| /* AArch64-specific support for NN-bit ELF. |
| Copyright (C) 2009-2014 Free Software Foundation, Inc. |
| Contributed by ARM Ltd. |
| |
| This file is part of BFD, the Binary File Descriptor library. |
| |
| This program is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 3 of the License, or |
| (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program; see the file COPYING3. If not, |
| see <http://www.gnu.org/licenses/>. */ |
| |
| /* Notes on implementation: |
| |
| Thread Local Store (TLS) |
| |
| Overview: |
| |
| The implementation currently supports both traditional TLS and TLS |
| descriptors, but only general dynamic (GD). |
| |
| For traditional TLS the assembler will present us with code |
| fragments of the form: |
| |
| adrp x0, :tlsgd:foo |
| R_AARCH64_TLSGD_ADR_PAGE21(foo) |
| add x0, :tlsgd_lo12:foo |
| R_AARCH64_TLSGD_ADD_LO12_NC(foo) |
| bl __tls_get_addr |
| nop |
| |
| For TLS descriptors the assembler will present us with code |
| fragments of the form: |
| |
| adrp x0, :tlsdesc:foo R_AARCH64_TLSDESC_ADR_PAGE21(foo) |
| ldr x1, [x0, #:tlsdesc_lo12:foo] R_AARCH64_TLSDESC_LD64_LO12(foo) |
| add x0, x0, #:tlsdesc_lo12:foo R_AARCH64_TLSDESC_ADD_LO12(foo) |
| .tlsdesccall foo |
| blr x1 R_AARCH64_TLSDESC_CALL(foo) |
| |
| The relocations R_AARCH64_TLSGD_{ADR_PREL21,ADD_LO12_NC} against foo |
| indicate that foo is thread local and should be accessed via the |
| traditional TLS mechanims. |
| |
| The relocations R_AARCH64_TLSDESC_{ADR_PAGE21,LD64_LO12_NC,ADD_LO12_NC} |
| against foo indicate that 'foo' is thread local and should be accessed |
| via a TLS descriptor mechanism. |
| |
| The precise instruction sequence is only relevant from the |
| perspective of linker relaxation which is currently not implemented. |
| |
| The static linker must detect that 'foo' is a TLS object and |
| allocate a double GOT entry. The GOT entry must be created for both |
| global and local TLS symbols. Note that this is different to none |
| TLS local objects which do not need a GOT entry. |
| |
| In the traditional TLS mechanism, the double GOT entry is used to |
| provide the tls_index structure, containing module and offset |
| entries. The static linker places the relocation R_AARCH64_TLS_DTPMOD |
| on the module entry. The loader will subsequently fixup this |
| relocation with the module identity. |
| |
| For global traditional TLS symbols the static linker places an |
| R_AARCH64_TLS_DTPREL relocation on the offset entry. The loader |
| will subsequently fixup the offset. For local TLS symbols the static |
| linker fixes up offset. |
| |
| In the TLS descriptor mechanism the double GOT entry is used to |
| provide the descriptor. The static linker places the relocation |
| R_AARCH64_TLSDESC on the first GOT slot. The loader will |
| subsequently fix this up. |
| |
| Implementation: |
| |
| The handling of TLS symbols is implemented across a number of |
| different backend functions. The following is a top level view of |
| what processing is performed where. |
| |
| The TLS implementation maintains state information for each TLS |
| symbol. The state information for local and global symbols is kept |
| in different places. Global symbols use generic BFD structures while |
| local symbols use backend specific structures that are allocated and |
| maintained entirely by the backend. |
| |
| The flow: |
| |
| elfNN_aarch64_check_relocs() |
| |
| This function is invoked for each relocation. |
| |
| The TLS relocations R_AARCH64_TLSGD_{ADR_PREL21,ADD_LO12_NC} and |
| R_AARCH64_TLSDESC_{ADR_PAGE21,LD64_LO12_NC,ADD_LO12_NC} are |
| spotted. One time creation of local symbol data structures are |
| created when the first local symbol is seen. |
| |
| The reference count for a symbol is incremented. The GOT type for |
| each symbol is marked as general dynamic. |
| |
| elfNN_aarch64_allocate_dynrelocs () |
| |
| For each global with positive reference count we allocate a double |
| GOT slot. For a traditional TLS symbol we allocate space for two |
| relocation entries on the GOT, for a TLS descriptor symbol we |
| allocate space for one relocation on the slot. Record the GOT offset |
| for this symbol. |
| |
| elfNN_aarch64_size_dynamic_sections () |
| |
| Iterate all input BFDS, look for in the local symbol data structure |
| constructed earlier for local TLS symbols and allocate them double |
| GOT slots along with space for a single GOT relocation. Update the |
| local symbol structure to record the GOT offset allocated. |
| |
| elfNN_aarch64_relocate_section () |
| |
| Calls elfNN_aarch64_final_link_relocate () |
| |
| Emit the relevant TLS relocations against the GOT for each TLS |
| symbol. For local TLS symbols emit the GOT offset directly. The GOT |
| relocations are emitted once the first time a TLS symbol is |
| encountered. The implementation uses the LSB of the GOT offset to |
| flag that the relevant GOT relocations for a symbol have been |
| emitted. All of the TLS code that uses the GOT offset needs to take |
| care to mask out this flag bit before using the offset. |
| |
| elfNN_aarch64_final_link_relocate () |
| |
| Fixup the R_AARCH64_TLSGD_{ADR_PREL21, ADD_LO12_NC} relocations. */ |
| |
| #include "sysdep.h" |
| #include "bfd.h" |
| #include "libiberty.h" |
| #include "libbfd.h" |
| #include "bfd_stdint.h" |
| #include "elf-bfd.h" |
| #include "bfdlink.h" |
| #include "objalloc.h" |
| #include "elf/aarch64.h" |
| #include "elfxx-aarch64.h" |
| |
| #define ARCH_SIZE NN |
| |
| #if ARCH_SIZE == 64 |
| #define AARCH64_R(NAME) R_AARCH64_ ## NAME |
| #define AARCH64_R_STR(NAME) "R_AARCH64_" #NAME |
| #define HOWTO64(...) HOWTO (__VA_ARGS__) |
| #define HOWTO32(...) EMPTY_HOWTO (0) |
| #define LOG_FILE_ALIGN 3 |
| #endif |
| |
| #if ARCH_SIZE == 32 |
| #define AARCH64_R(NAME) R_AARCH64_P32_ ## NAME |
| #define AARCH64_R_STR(NAME) "R_AARCH64_P32_" #NAME |
| #define HOWTO64(...) EMPTY_HOWTO (0) |
| #define HOWTO32(...) HOWTO (__VA_ARGS__) |
| #define LOG_FILE_ALIGN 2 |
| #endif |
| |
| #define IS_AARCH64_TLS_RELOC(R_TYPE) \ |
| ((R_TYPE) == BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21 \ |
| || (R_TYPE) == BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC \ |
| || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G1 \ |
| || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G0_NC \ |
| || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21 \ |
| || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC \ |
| || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC \ |
| || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19 \ |
| || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12 \ |
| || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12 \ |
| || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12_NC \ |
| || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2 \ |
| || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1 \ |
| || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC \ |
| || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0 \ |
| || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC \ |
| || (R_TYPE) == BFD_RELOC_AARCH64_TLS_DTPMOD \ |
| || (R_TYPE) == BFD_RELOC_AARCH64_TLS_DTPREL \ |
| || (R_TYPE) == BFD_RELOC_AARCH64_TLS_TPREL \ |
| || IS_AARCH64_TLSDESC_RELOC ((R_TYPE))) |
| |
| #define IS_AARCH64_TLSDESC_RELOC(R_TYPE) \ |
| ((R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_LD_PREL19 \ |
| || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21 \ |
| || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21 \ |
| || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC \ |
| || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_LD64_LO12_NC \ |
| || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC \ |
| || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_OFF_G1 \ |
| || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_OFF_G0_NC \ |
| || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_LDR \ |
| || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_ADD \ |
| || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_CALL \ |
| || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC) |
| |
| #define ELIMINATE_COPY_RELOCS 0 |
| |
| /* Return size of a relocation entry. HTAB is the bfd's |
| elf_aarch64_link_hash_entry. */ |
| #define RELOC_SIZE(HTAB) (sizeof (ElfNN_External_Rela)) |
| |
| /* GOT Entry size - 8 bytes in ELF64 and 4 bytes in ELF32. */ |
| #define GOT_ENTRY_SIZE (ARCH_SIZE / 8) |
| #define PLT_ENTRY_SIZE (32) |
| #define PLT_SMALL_ENTRY_SIZE (16) |
| #define PLT_TLSDESC_ENTRY_SIZE (32) |
| |
| /* Encoding of the nop instruction */ |
| #define INSN_NOP 0xd503201f |
| |
| #define aarch64_compute_jump_table_size(htab) \ |
| (((htab)->root.srelplt == NULL) ? 0 \ |
| : (htab)->root.srelplt->reloc_count * GOT_ENTRY_SIZE) |
| |
| /* The first entry in a procedure linkage table looks like this |
| if the distance between the PLTGOT and the PLT is < 4GB use |
| these PLT entries. Note that the dynamic linker gets &PLTGOT[2] |
| in x16 and needs to work out PLTGOT[1] by using an address of |
| [x16,#-GOT_ENTRY_SIZE]. */ |
| static const bfd_byte elfNN_aarch64_small_plt0_entry[PLT_ENTRY_SIZE] = |
| { |
| 0xf0, 0x7b, 0xbf, 0xa9, /* stp x16, x30, [sp, #-16]! */ |
| 0x10, 0x00, 0x00, 0x90, /* adrp x16, (GOT+16) */ |
| #if ARCH_SIZE == 64 |
| 0x11, 0x0A, 0x40, 0xf9, /* ldr x17, [x16, #PLT_GOT+0x10] */ |
| 0x10, 0x42, 0x00, 0x91, /* add x16, x16,#PLT_GOT+0x10 */ |
| #else |
| 0x11, 0x0A, 0x40, 0xb9, /* ldr w17, [x16, #PLT_GOT+0x8] */ |
| 0x10, 0x22, 0x00, 0x11, /* add w16, w16,#PLT_GOT+0x8 */ |
| #endif |
| 0x20, 0x02, 0x1f, 0xd6, /* br x17 */ |
| 0x1f, 0x20, 0x03, 0xd5, /* nop */ |
| 0x1f, 0x20, 0x03, 0xd5, /* nop */ |
| 0x1f, 0x20, 0x03, 0xd5, /* nop */ |
| }; |
| |
| /* Per function entry in a procedure linkage table looks like this |
| if the distance between the PLTGOT and the PLT is < 4GB use |
| these PLT entries. */ |
| static const bfd_byte elfNN_aarch64_small_plt_entry[PLT_SMALL_ENTRY_SIZE] = |
| { |
| 0x10, 0x00, 0x00, 0x90, /* adrp x16, PLTGOT + n * 8 */ |
| #if ARCH_SIZE == 64 |
| 0x11, 0x02, 0x40, 0xf9, /* ldr x17, [x16, PLTGOT + n * 8] */ |
| 0x10, 0x02, 0x00, 0x91, /* add x16, x16, :lo12:PLTGOT + n * 8 */ |
| #else |
| 0x11, 0x02, 0x40, 0xb9, /* ldr w17, [x16, PLTGOT + n * 4] */ |
| 0x10, 0x02, 0x00, 0x11, /* add w16, w16, :lo12:PLTGOT + n * 4 */ |
| #endif |
| 0x20, 0x02, 0x1f, 0xd6, /* br x17. */ |
| }; |
| |
| static const bfd_byte |
| elfNN_aarch64_tlsdesc_small_plt_entry[PLT_TLSDESC_ENTRY_SIZE] = |
| { |
| 0xe2, 0x0f, 0xbf, 0xa9, /* stp x2, x3, [sp, #-16]! */ |
| 0x02, 0x00, 0x00, 0x90, /* adrp x2, 0 */ |
| 0x03, 0x00, 0x00, 0x90, /* adrp x3, 0 */ |
| #if ARCH_SIZE == 64 |
| 0x42, 0x00, 0x40, 0xf9, /* ldr x2, [x2, #0] */ |
| 0x63, 0x00, 0x00, 0x91, /* add x3, x3, 0 */ |
| #else |
| 0x42, 0x00, 0x40, 0xb9, /* ldr w2, [x2, #0] */ |
| 0x63, 0x00, 0x00, 0x11, /* add w3, w3, 0 */ |
| #endif |
| 0x40, 0x00, 0x1f, 0xd6, /* br x2 */ |
| 0x1f, 0x20, 0x03, 0xd5, /* nop */ |
| 0x1f, 0x20, 0x03, 0xd5, /* nop */ |
| }; |
| |
| #define elf_info_to_howto elfNN_aarch64_info_to_howto |
| #define elf_info_to_howto_rel elfNN_aarch64_info_to_howto |
| |
| #define AARCH64_ELF_ABI_VERSION 0 |
| |
| /* In case we're on a 32-bit machine, construct a 64-bit "-1" value. */ |
| #define ALL_ONES (~ (bfd_vma) 0) |
| |
| /* Indexed by the bfd interal reloc enumerators. |
| Therefore, the table needs to be synced with BFD_RELOC_AARCH64_* |
| in reloc.c. */ |
| |
| static reloc_howto_type elfNN_aarch64_howto_table[] = |
| { |
| EMPTY_HOWTO (0), |
| |
| /* Basic data relocations. */ |
| |
| #if ARCH_SIZE == 64 |
| HOWTO (R_AARCH64_NULL, /* type */ |
| 0, /* rightshift */ |
| 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 0, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_AARCH64_NULL", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| #else |
| HOWTO (R_AARCH64_NONE, /* type */ |
| 0, /* rightshift */ |
| 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 0, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_AARCH64_NONE", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| #endif |
| |
| /* .xword: (S+A) */ |
| HOWTO64 (AARCH64_R (ABS64), /* type */ |
| 0, /* rightshift */ |
| 4, /* size (4 = long long) */ |
| 64, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_unsigned, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| AARCH64_R_STR (ABS64), /* name */ |
| FALSE, /* partial_inplace */ |
| ALL_ONES, /* src_mask */ |
| ALL_ONES, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* .word: (S+A) */ |
| HOWTO (AARCH64_R (ABS32), /* type */ |
| 0, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 32, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_unsigned, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| AARCH64_R_STR (ABS32), /* name */ |
| FALSE, /* partial_inplace */ |
| 0xffffffff, /* src_mask */ |
| 0xffffffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* .half: (S+A) */ |
| HOWTO (AARCH64_R (ABS16), /* type */ |
| 0, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_unsigned, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| AARCH64_R_STR (ABS16), /* name */ |
| FALSE, /* partial_inplace */ |
| 0xffff, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* .xword: (S+A-P) */ |
| HOWTO64 (AARCH64_R (PREL64), /* type */ |
| 0, /* rightshift */ |
| 4, /* size (4 = long long) */ |
| 64, /* bitsize */ |
| TRUE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_signed, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| AARCH64_R_STR (PREL64), /* name */ |
| FALSE, /* partial_inplace */ |
| ALL_ONES, /* src_mask */ |
| ALL_ONES, /* dst_mask */ |
| TRUE), /* pcrel_offset */ |
| |
| /* .word: (S+A-P) */ |
| HOWTO (AARCH64_R (PREL32), /* type */ |
| 0, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 32, /* bitsize */ |
| TRUE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_signed, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| AARCH64_R_STR (PREL32), /* name */ |
| FALSE, /* partial_inplace */ |
| 0xffffffff, /* src_mask */ |
| 0xffffffff, /* dst_mask */ |
| TRUE), /* pcrel_offset */ |
| |
| /* .half: (S+A-P) */ |
| HOWTO (AARCH64_R (PREL16), /* type */ |
| 0, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| TRUE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_signed, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| AARCH64_R_STR (PREL16), /* name */ |
| FALSE, /* partial_inplace */ |
| 0xffff, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| TRUE), /* pcrel_offset */ |
| |
| /* Group relocations to create a 16, 32, 48 or 64 bit |
| unsigned data or abs address inline. */ |
| |
| /* MOVZ: ((S+A) >> 0) & 0xffff */ |
| HOWTO (AARCH64_R (MOVW_UABS_G0), /* type */ |
| 0, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_unsigned, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| AARCH64_R_STR (MOVW_UABS_G0), /* name */ |
| FALSE, /* partial_inplace */ |
| 0xffff, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* MOVK: ((S+A) >> 0) & 0xffff [no overflow check] */ |
| HOWTO (AARCH64_R (MOVW_UABS_G0_NC), /* type */ |
| 0, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| AARCH64_R_STR (MOVW_UABS_G0_NC), /* name */ |
| FALSE, /* partial_inplace */ |
| 0xffff, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* MOVZ: ((S+A) >> 16) & 0xffff */ |
| HOWTO (AARCH64_R (MOVW_UABS_G1), /* type */ |
| 16, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_unsigned, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| AARCH64_R_STR (MOVW_UABS_G1), /* name */ |
| FALSE, /* partial_inplace */ |
| 0xffff, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* MOVK: ((S+A) >> 16) & 0xffff [no overflow check] */ |
| HOWTO64 (AARCH64_R (MOVW_UABS_G1_NC), /* type */ |
| 16, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| AARCH64_R_STR (MOVW_UABS_G1_NC), /* name */ |
| FALSE, /* partial_inplace */ |
| 0xffff, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* MOVZ: ((S+A) >> 32) & 0xffff */ |
| HOWTO64 (AARCH64_R (MOVW_UABS_G2), /* type */ |
| 32, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_unsigned, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| AARCH64_R_STR (MOVW_UABS_G2), /* name */ |
| FALSE, /* partial_inplace */ |
| 0xffff, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* MOVK: ((S+A) >> 32) & 0xffff [no overflow check] */ |
| HOWTO64 (AARCH64_R (MOVW_UABS_G2_NC), /* type */ |
| 32, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| AARCH64_R_STR (MOVW_UABS_G2_NC), /* name */ |
| FALSE, /* partial_inplace */ |
| 0xffff, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* MOVZ: ((S+A) >> 48) & 0xffff */ |
| HOWTO64 (AARCH64_R (MOVW_UABS_G3), /* type */ |
| 48, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_unsigned, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| AARCH64_R_STR (MOVW_UABS_G3), /* name */ |
| FALSE, /* partial_inplace */ |
| 0xffff, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Group relocations to create high part of a 16, 32, 48 or 64 bit |
| signed data or abs address inline. Will change instruction |
| to MOVN or MOVZ depending on sign of calculated value. */ |
| |
| /* MOV[ZN]: ((S+A) >> 0) & 0xffff */ |
| HOWTO (AARCH64_R (MOVW_SABS_G0), /* type */ |
| 0, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_signed, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| AARCH64_R_STR (MOVW_SABS_G0), /* name */ |
| FALSE, /* partial_inplace */ |
| 0xffff, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* MOV[ZN]: ((S+A) >> 16) & 0xffff */ |
| HOWTO64 (AARCH64_R (MOVW_SABS_G1), /* type */ |
| 16, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_signed, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| AARCH64_R_STR (MOVW_SABS_G1), /* name */ |
| FALSE, /* partial_inplace */ |
| 0xffff, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* MOV[ZN]: ((S+A) >> 32) & 0xffff */ |
| HOWTO64 (AARCH64_R (MOVW_SABS_G2), /* type */ |
| 32, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_signed, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| AARCH64_R_STR (MOVW_SABS_G2), /* name */ |
| FALSE, /* partial_inplace */ |
| 0xffff, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Relocations to generate 19, 21 and 33 bit PC-relative load/store |
| addresses: PG(x) is (x & ~0xfff). */ |
| |
| /* LD-lit: ((S+A-P) >> 2) & 0x7ffff */ |
| HOWTO (AARCH64_R (LD_PREL_LO19), /* type */ |
| 2, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 19, /* bitsize */ |
| TRUE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_signed, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| AARCH64_R_STR (LD_PREL_LO19), /* name */ |
| FALSE, /* partial_inplace */ |
| 0x7ffff, /* src_mask */ |
| 0x7ffff, /* dst_mask */ |
| TRUE), /* pcrel_offset */ |
| |
| /* ADR: (S+A-P) & 0x1fffff */ |
| HOWTO (AARCH64_R (ADR_PREL_LO21), /* type */ |
| 0, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 21, /* bitsize */ |
| TRUE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_signed, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| AARCH64_R_STR (ADR_PREL_LO21), /* name */ |
| FALSE, /* partial_inplace */ |
| 0x1fffff, /* src_mask */ |
| 0x1fffff, /* dst_mask */ |
| TRUE), /* pcrel_offset */ |
| |
| /* ADRP: ((PG(S+A)-PG(P)) >> 12) & 0x1fffff */ |
| HOWTO (AARCH64_R (ADR_PREL_PG_HI21), /* type */ |
| 12, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 21, /* bitsize */ |
| TRUE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_signed, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| AARCH64_R_STR (ADR_PREL_PG_HI21), /* name */ |
| FALSE, /* partial_inplace */ |
| 0x1fffff, /* src_mask */ |
| 0x1fffff, /* dst_mask */ |
| TRUE), /* pcrel_offset */ |
| |
| /* ADRP: ((PG(S+A)-PG(P)) >> 12) & 0x1fffff [no overflow check] */ |
| HOWTO64 (AARCH64_R (ADR_PREL_PG_HI21_NC), /* type */ |
| 12, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 21, /* bitsize */ |
| TRUE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| AARCH64_R_STR (ADR_PREL_PG_HI21_NC), /* name */ |
| FALSE, /* partial_inplace */ |
| 0x1fffff, /* src_mask */ |
| 0x1fffff, /* dst_mask */ |
| TRUE), /* pcrel_offset */ |
| |
| /* ADD: (S+A) & 0xfff [no overflow check] */ |
| HOWTO (AARCH64_R (ADD_ABS_LO12_NC), /* type */ |
| 0, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 12, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 10, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| AARCH64_R_STR (ADD_ABS_LO12_NC), /* name */ |
| FALSE, /* partial_inplace */ |
| 0x3ffc00, /* src_mask */ |
| 0x3ffc00, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* LD/ST8: (S+A) & 0xfff */ |
| HOWTO (AARCH64_R (LDST8_ABS_LO12_NC), /* type */ |
| 0, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 12, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| AARCH64_R_STR (LDST8_ABS_LO12_NC), /* name */ |
| FALSE, /* partial_inplace */ |
| 0xfff, /* src_mask */ |
| 0xfff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Relocations for control-flow instructions. */ |
| |
| /* TBZ/NZ: ((S+A-P) >> 2) & 0x3fff */ |
| HOWTO (AARCH64_R (TSTBR14), /* type */ |
| 2, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 14, /* bitsize */ |
| TRUE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_signed, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| AARCH64_R_STR (TSTBR14), /* name */ |
| FALSE, /* partial_inplace */ |
| 0x3fff, /* src_mask */ |
| 0x3fff, /* dst_mask */ |
| TRUE), /* pcrel_offset */ |
| |
| /* B.cond: ((S+A-P) >> 2) & 0x7ffff */ |
| HOWTO (AARCH64_R (CONDBR19), /* type */ |
| 2, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 19, /* bitsize */ |
| TRUE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_signed, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| AARCH64_R_STR (CONDBR19), /* name */ |
| FALSE, /* partial_inplace */ |
| 0x7ffff, /* src_mask */ |
| 0x7ffff, /* dst_mask */ |
| TRUE), /* pcrel_offset */ |
| |
| /* B: ((S+A-P) >> 2) & 0x3ffffff */ |
| HOWTO (AARCH64_R (JUMP26), /* type */ |
| 2, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 26, /* bitsize */ |
| TRUE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_signed, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| AARCH64_R_STR (JUMP26), /* name */ |
| FALSE, /* partial_inplace */ |
| 0x3ffffff, /* src_mask */ |
| 0x3ffffff, /* dst_mask */ |
| TRUE), /* pcrel_offset */ |
| |
| /* BL: ((S+A-P) >> 2) & 0x3ffffff */ |
| HOWTO (AARCH64_R (CALL26), /* type */ |
| 2, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 26, /* bitsize */ |
| TRUE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_signed, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| AARCH64_R_STR (CALL26), /* name */ |
| FALSE, /* partial_inplace */ |
| 0x3ffffff, /* src_mask */ |
| 0x3ffffff, /* dst_mask */ |
| TRUE), /* pcrel_offset */ |
| |
| /* LD/ST16: (S+A) & 0xffe */ |
| HOWTO (AARCH64_R (LDST16_ABS_LO12_NC), /* type */ |
| 1, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 12, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| AARCH64_R_STR (LDST16_ABS_LO12_NC), /* name */ |
| FALSE, /* partial_inplace */ |
| 0xffe, /* src_mask */ |
| 0xffe, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* LD/ST32: (S+A) & 0xffc */ |
| HOWTO (AARCH64_R (LDST32_ABS_LO12_NC), /* type */ |
| 2, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 12, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| AARCH64_R_STR (LDST32_ABS_LO12_NC), /* name */ |
| FALSE, /* partial_inplace */ |
| 0xffc, /* src_mask */ |
| 0xffc, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* LD/ST64: (S+A) & 0xff8 */ |
| HOWTO (AARCH64_R (LDST64_ABS_LO12_NC), /* type */ |
| 3, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 12, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| AARCH64_R_STR (LDST64_ABS_LO12_NC), /* name */ |
| FALSE, /* partial_inplace */ |
| 0xff8, /* src_mask */ |
| 0xff8, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* LD/ST128: (S+A) & 0xff0 */ |
| HOWTO (AARCH64_R (LDST128_ABS_LO12_NC), /* type */ |
| 4, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 12, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| AARCH64_R_STR (LDST128_ABS_LO12_NC), /* name */ |
| FALSE, /* partial_inplace */ |
| 0xff0, /* src_mask */ |
| 0xff0, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Set a load-literal immediate field to bits |
| 0x1FFFFC of G(S)-P */ |
| HOWTO (AARCH64_R (GOT_LD_PREL19), /* type */ |
| 2, /* rightshift */ |
| 2, /* size (0 = byte,1 = short,2 = long) */ |
| 19, /* bitsize */ |
| TRUE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_signed, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| AARCH64_R_STR (GOT_LD_PREL19), /* name */ |
| FALSE, /* partial_inplace */ |
| 0xffffe0, /* src_mask */ |
| 0xffffe0, /* dst_mask */ |
| TRUE), /* pcrel_offset */ |
| |
| /* Get to the page for the GOT entry for the symbol |
| (G(S) - P) using an ADRP instruction. */ |
| HOWTO (AARCH64_R (ADR_GOT_PAGE), /* type */ |
| 12, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 21, /* bitsize */ |
| TRUE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| AARCH64_R_STR (ADR_GOT_PAGE), /* name */ |
| FALSE, /* partial_inplace */ |
| 0x1fffff, /* src_mask */ |
| 0x1fffff, /* dst_mask */ |
| TRUE), /* pcrel_offset */ |
| |
| /* LD64: GOT offset G(S) & 0xff8 */ |
| HOWTO64 (AARCH64_R (LD64_GOT_LO12_NC), /* type */ |
| 3, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 12, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| AARCH64_R_STR (LD64_GOT_LO12_NC), /* name */ |
| FALSE, /* partial_inplace */ |
| 0xff8, /* src_mask */ |
| 0xff8, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* LD32: GOT offset G(S) & 0xffc */ |
| HOWTO32 (AARCH64_R (LD32_GOT_LO12_NC), /* type */ |
| 2, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 12, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| AARCH64_R_STR (LD32_GOT_LO12_NC), /* name */ |
| FALSE, /* partial_inplace */ |
| 0xffc, /* src_mask */ |
| 0xffc, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Get to the page for the GOT entry for the symbol |
| (G(S) - P) using an ADRP instruction. */ |
| HOWTO (AARCH64_R (TLSGD_ADR_PAGE21), /* type */ |
| 12, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 21, /* bitsize */ |
| TRUE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| AARCH64_R_STR (TLSGD_ADR_PAGE21), /* name */ |
| FALSE, /* partial_inplace */ |
| 0x1fffff, /* src_mask */ |
| 0x1fffff, /* dst_mask */ |
| TRUE), /* pcrel_offset */ |
| |
| /* ADD: GOT offset G(S) & 0xff8 [no overflow check] */ |
| HOWTO (AARCH64_R (TLSGD_ADD_LO12_NC), /* type */ |
| 0, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 12, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| AARCH64_R_STR (TLSGD_ADD_LO12_NC), /* name */ |
| FALSE, /* partial_inplace */ |
| 0xfff, /* src_mask */ |
| 0xfff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| HOWTO64 (AARCH64_R (TLSIE_MOVW_GOTTPREL_G1), /* type */ |
| 16, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| AARCH64_R_STR (TLSIE_MOVW_GOTTPREL_G1), /* name */ |
| FALSE, /* partial_inplace */ |
| 0xffff, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| HOWTO64 (AARCH64_R (TLSIE_MOVW_GOTTPREL_G0_NC), /* type */ |
| 0, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 32, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| AARCH64_R_STR (TLSIE_MOVW_GOTTPREL_G0_NC), /* name */ |
| FALSE, /* partial_inplace */ |
| 0xffff, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| HOWTO (AARCH64_R (TLSIE_ADR_GOTTPREL_PAGE21), /* type */ |
| 12, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 21, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| AARCH64_R_STR (TLSIE_ADR_GOTTPREL_PAGE21), /* name */ |
| FALSE, /* partial_inplace */ |
| 0x1fffff, /* src_mask */ |
| 0x1fffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| HOWTO64 (AARCH64_R (TLSIE_LD64_GOTTPREL_LO12_NC), /* type */ |
| 3, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 12, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| AARCH64_R_STR (TLSIE_LD64_GOTTPREL_LO12_NC), /* name */ |
| FALSE, /* partial_inplace */ |
| 0xff8, /* src_mask */ |
| 0xff8, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| HOWTO32 (AARCH64_R (TLSIE_LD32_GOTTPREL_LO12_NC), /* type */ |
| 2, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 12, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| AARCH64_R_STR (TLSIE_LD32_GOTTPREL_LO12_NC), /* name */ |
| FALSE, /* partial_inplace */ |
| 0xffc, /* src_mask */ |
| 0xffc, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| HOWTO (AARCH64_R (TLSIE_LD_GOTTPREL_PREL19), /* type */ |
| 2, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 21, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| AARCH64_R_STR (TLSIE_LD_GOTTPREL_PREL19), /* name */ |
| FALSE, /* partial_inplace */ |
| 0x1ffffc, /* src_mask */ |
| 0x1ffffc, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| HOWTO64 (AARCH64_R (TLSLE_MOVW_TPREL_G2), /* type */ |
| 32, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 12, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| AARCH64_R_STR (TLSLE_MOVW_TPREL_G2), /* name */ |
| FALSE, /* partial_inplace */ |
| 0xffff, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| HOWTO (AARCH64_R (TLSLE_MOVW_TPREL_G1), /* type */ |
| 16, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 12, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| AARCH64_R_STR (TLSLE_MOVW_TPREL_G1), /* name */ |
| FALSE, /* partial_inplace */ |
| 0xffff, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| HOWTO64 (AARCH64_R (TLSLE_MOVW_TPREL_G1_NC), /* type */ |
| 16, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 12, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| AARCH64_R_STR (TLSLE_MOVW_TPREL_G1_NC), /* name */ |
| FALSE, /* partial_inplace */ |
| 0xffff, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| HOWTO (AARCH64_R (TLSLE_MOVW_TPREL_G0), /* type */ |
| 0, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 12, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| AARCH64_R_STR (TLSLE_MOVW_TPREL_G0), /* name */ |
| FALSE, /* partial_inplace */ |
| 0xffff, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| HOWTO (AARCH64_R (TLSLE_MOVW_TPREL_G0_NC), /* type */ |
| 0, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 12, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| AARCH64_R_STR (TLSLE_MOVW_TPREL_G0_NC), /* name */ |
| FALSE, /* partial_inplace */ |
| 0xffff, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| HOWTO (AARCH64_R (TLSLE_ADD_TPREL_HI12), /* type */ |
| 12, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 12, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| AARCH64_R_STR (TLSLE_ADD_TPREL_HI12), /* name */ |
| FALSE, /* partial_inplace */ |
| 0xfff, /* src_mask */ |
| 0xfff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| HOWTO (AARCH64_R (TLSLE_ADD_TPREL_LO12), /* type */ |
| 0, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 12, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| AARCH64_R_STR (TLSLE_ADD_TPREL_LO12), /* name */ |
| FALSE, /* partial_inplace */ |
| 0xfff, /* src_mask */ |
| 0xfff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| HOWTO (AARCH64_R (TLSLE_ADD_TPREL_LO12_NC), /* type */ |
| 0, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 12, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| AARCH64_R_STR (TLSLE_ADD_TPREL_LO12_NC), /* name */ |
| FALSE, /* partial_inplace */ |
| 0xfff, /* src_mask */ |
| 0xfff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| HOWTO (AARCH64_R (TLSDESC_LD_PREL19), /* type */ |
| 2, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 21, /* bitsize */ |
| TRUE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| AARCH64_R_STR (TLSDESC_LD_PREL19), /* name */ |
| FALSE, /* partial_inplace */ |
| 0x1ffffc, /* src_mask */ |
| 0x1ffffc, /* dst_mask */ |
| TRUE), /* pcrel_offset */ |
| |
| HOWTO (AARCH64_R (TLSDESC_ADR_PREL21), /* type */ |
| 0, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 21, /* bitsize */ |
| TRUE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| AARCH64_R_STR (TLSDESC_ADR_PREL21), /* name */ |
| FALSE, /* partial_inplace */ |
| 0x1fffff, /* src_mask */ |
| 0x1fffff, /* dst_mask */ |
| TRUE), /* pcrel_offset */ |
| |
| /* Get to the page for the GOT entry for the symbol |
| (G(S) - P) using an ADRP instruction. */ |
| HOWTO (AARCH64_R (TLSDESC_ADR_PAGE21), /* type */ |
| 12, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 21, /* bitsize */ |
| TRUE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| AARCH64_R_STR (TLSDESC_ADR_PAGE21), /* name */ |
| FALSE, /* partial_inplace */ |
| 0x1fffff, /* src_mask */ |
| 0x1fffff, /* dst_mask */ |
| TRUE), /* pcrel_offset */ |
| |
| /* LD64: GOT offset G(S) & 0xff8. */ |
| HOWTO64 (AARCH64_R (TLSDESC_LD64_LO12_NC), /* type */ |
| 3, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 12, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| AARCH64_R_STR (TLSDESC_LD64_LO12_NC), /* name */ |
| FALSE, /* partial_inplace */ |
| 0xff8, /* src_mask */ |
| 0xff8, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* LD32: GOT offset G(S) & 0xffc. */ |
| HOWTO32 (AARCH64_R (TLSDESC_LD32_LO12_NC), /* type */ |
| 2, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 12, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| AARCH64_R_STR (TLSDESC_LD32_LO12_NC), /* name */ |
| FALSE, /* partial_inplace */ |
| 0xffc, /* src_mask */ |
| 0xffc, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* ADD: GOT offset G(S) & 0xfff. */ |
| HOWTO (AARCH64_R (TLSDESC_ADD_LO12_NC), /* type */ |
| 0, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 12, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| AARCH64_R_STR (TLSDESC_ADD_LO12_NC), /* name */ |
| FALSE, /* partial_inplace */ |
| 0xfff, /* src_mask */ |
| 0xfff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| HOWTO64 (AARCH64_R (TLSDESC_OFF_G1), /* type */ |
| 16, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 12, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| AARCH64_R_STR (TLSDESC_OFF_G1), /* name */ |
| FALSE, /* partial_inplace */ |
| 0xffff, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| HOWTO64 (AARCH64_R (TLSDESC_OFF_G0_NC), /* type */ |
| 0, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 12, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| AARCH64_R_STR (TLSDESC_OFF_G0_NC), /* name */ |
| FALSE, /* partial_inplace */ |
| 0xffff, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| HOWTO64 (AARCH64_R (TLSDESC_LDR), /* type */ |
| 0, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 12, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| AARCH64_R_STR (TLSDESC_LDR), /* name */ |
| FALSE, /* partial_inplace */ |
| 0x0, /* src_mask */ |
| 0x0, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| HOWTO64 (AARCH64_R (TLSDESC_ADD), /* type */ |
| 0, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 12, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| AARCH64_R_STR (TLSDESC_ADD), /* name */ |
| FALSE, /* partial_inplace */ |
| 0x0, /* src_mask */ |
| 0x0, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| HOWTO (AARCH64_R (TLSDESC_CALL), /* type */ |
| 0, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 12, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| AARCH64_R_STR (TLSDESC_CALL), /* name */ |
| FALSE, /* partial_inplace */ |
| 0x0, /* src_mask */ |
| 0x0, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| HOWTO (AARCH64_R (COPY), /* type */ |
| 0, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 64, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_bitfield, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| AARCH64_R_STR (COPY), /* name */ |
| TRUE, /* partial_inplace */ |
| 0xffffffff, /* src_mask */ |
| 0xffffffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| HOWTO (AARCH64_R (GLOB_DAT), /* type */ |
| 0, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 64, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_bitfield, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| AARCH64_R_STR (GLOB_DAT), /* name */ |
| TRUE, /* partial_inplace */ |
| 0xffffffff, /* src_mask */ |
| 0xffffffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| HOWTO (AARCH64_R (JUMP_SLOT), /* type */ |
| 0, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 64, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_bitfield, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| AARCH64_R_STR (JUMP_SLOT), /* name */ |
| TRUE, /* partial_inplace */ |
| 0xffffffff, /* src_mask */ |
| 0xffffffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| HOWTO (AARCH64_R (RELATIVE), /* type */ |
| 0, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 64, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_bitfield, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| AARCH64_R_STR (RELATIVE), /* name */ |
| TRUE, /* partial_inplace */ |
| ALL_ONES, /* src_mask */ |
| ALL_ONES, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| HOWTO (AARCH64_R (TLS_DTPMOD), /* type */ |
| 0, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 64, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| #if ARCH_SIZE == 64 |
| AARCH64_R_STR (TLS_DTPMOD64), /* name */ |
| #else |
| AARCH64_R_STR (TLS_DTPMOD), /* name */ |
| #endif |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| ALL_ONES, /* dst_mask */ |
| FALSE), /* pc_reloffset */ |
| |
| HOWTO (AARCH64_R (TLS_DTPREL), /* type */ |
| 0, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 64, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| #if ARCH_SIZE == 64 |
| AARCH64_R_STR (TLS_DTPREL64), /* name */ |
| #else |
| AARCH64_R_STR (TLS_DTPREL), /* name */ |
| #endif |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| ALL_ONES, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| HOWTO (AARCH64_R (TLS_TPREL), /* type */ |
| 0, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 64, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| #if ARCH_SIZE == 64 |
| AARCH64_R_STR (TLS_TPREL64), /* name */ |
| #else |
| AARCH64_R_STR (TLS_TPREL), /* name */ |
| #endif |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| ALL_ONES, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| HOWTO (AARCH64_R (TLSDESC), /* type */ |
| 0, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 64, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| AARCH64_R_STR (TLSDESC), /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| ALL_ONES, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| HOWTO (AARCH64_R (IRELATIVE), /* type */ |
| 0, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 64, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_bitfield, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| AARCH64_R_STR (IRELATIVE), /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| ALL_ONES, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| EMPTY_HOWTO (0), |
| }; |
| |
| static reloc_howto_type elfNN_aarch64_howto_none = |
| HOWTO (R_AARCH64_NONE, /* type */ |
| 0, /* rightshift */ |
| 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 0, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont,/* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_AARCH64_NONE", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0, /* dst_mask */ |
| FALSE); /* pcrel_offset */ |
| |
| /* Given HOWTO, return the bfd internal relocation enumerator. */ |
| |
| static bfd_reloc_code_real_type |
| elfNN_aarch64_bfd_reloc_from_howto (reloc_howto_type *howto) |
| { |
| const int size |
| = (int) ARRAY_SIZE (elfNN_aarch64_howto_table); |
| const ptrdiff_t offset |
| = howto - elfNN_aarch64_howto_table; |
| |
| if (offset > 0 && offset < size - 1) |
| return BFD_RELOC_AARCH64_RELOC_START + offset; |
| |
| if (howto == &elfNN_aarch64_howto_none) |
| return BFD_RELOC_AARCH64_NONE; |
| |
| return BFD_RELOC_AARCH64_RELOC_START; |
| } |
| |
| /* Given R_TYPE, return the bfd internal relocation enumerator. */ |
| |
| static bfd_reloc_code_real_type |
| elfNN_aarch64_bfd_reloc_from_type (unsigned int r_type) |
| { |
| static bfd_boolean initialized_p = FALSE; |
| /* Indexed by R_TYPE, values are offsets in the howto_table. */ |
| static unsigned int offsets[R_AARCH64_end]; |
| |
| if (initialized_p == FALSE) |
| { |
| unsigned int i; |
| |
| for (i = 1; i < ARRAY_SIZE (elfNN_aarch64_howto_table) - 1; ++i) |
| if (elfNN_aarch64_howto_table[i].type != 0) |
| offsets[elfNN_aarch64_howto_table[i].type] = i; |
| |
| initialized_p = TRUE; |
| } |
| |
| if (r_type == R_AARCH64_NONE || r_type == R_AARCH64_NULL) |
| return BFD_RELOC_AARCH64_NONE; |
| |
| return BFD_RELOC_AARCH64_RELOC_START + offsets[r_type]; |
| } |
| |
| struct elf_aarch64_reloc_map |
| { |
| bfd_reloc_code_real_type from; |
| bfd_reloc_code_real_type to; |
| }; |
| |
| /* Map bfd generic reloc to AArch64-specific reloc. */ |
| static const struct elf_aarch64_reloc_map elf_aarch64_reloc_map[] = |
| { |
| {BFD_RELOC_NONE, BFD_RELOC_AARCH64_NONE}, |
| |
| /* Basic data relocations. */ |
| {BFD_RELOC_CTOR, BFD_RELOC_AARCH64_NN}, |
| {BFD_RELOC_64, BFD_RELOC_AARCH64_64}, |
| {BFD_RELOC_32, BFD_RELOC_AARCH64_32}, |
| {BFD_RELOC_16, BFD_RELOC_AARCH64_16}, |
| {BFD_RELOC_64_PCREL, BFD_RELOC_AARCH64_64_PCREL}, |
| {BFD_RELOC_32_PCREL, BFD_RELOC_AARCH64_32_PCREL}, |
| {BFD_RELOC_16_PCREL, BFD_RELOC_AARCH64_16_PCREL}, |
| }; |
| |
| /* Given the bfd internal relocation enumerator in CODE, return the |
| corresponding howto entry. */ |
| |
| static reloc_howto_type * |
| elfNN_aarch64_howto_from_bfd_reloc (bfd_reloc_code_real_type code) |
| { |
| unsigned int i; |
| |
| /* Convert bfd generic reloc to AArch64-specific reloc. */ |
| if (code < BFD_RELOC_AARCH64_RELOC_START |
| || code > BFD_RELOC_AARCH64_RELOC_END) |
| for (i = 0; i < ARRAY_SIZE (elf_aarch64_reloc_map); i++) |
| if (elf_aarch64_reloc_map[i].from == code) |
| { |
| code = elf_aarch64_reloc_map[i].to; |
| break; |
| } |
| |
| if (code > BFD_RELOC_AARCH64_RELOC_START |
| && code < BFD_RELOC_AARCH64_RELOC_END) |
| if (elfNN_aarch64_howto_table[code - BFD_RELOC_AARCH64_RELOC_START].type) |
| return &elfNN_aarch64_howto_table[code - BFD_RELOC_AARCH64_RELOC_START]; |
| |
| if (code == BFD_RELOC_AARCH64_NONE) |
| return &elfNN_aarch64_howto_none; |
| |
| return NULL; |
| } |
| |
| static reloc_howto_type * |
| elfNN_aarch64_howto_from_type (unsigned int r_type) |
| { |
| bfd_reloc_code_real_type val; |
| reloc_howto_type *howto; |
| |
| #if ARCH_SIZE == 32 |
| if (r_type > 256) |
| { |
| bfd_set_error (bfd_error_bad_value); |
| return NULL; |
| } |
| #endif |
| |
| if (r_type == R_AARCH64_NONE) |
| return &elfNN_aarch64_howto_none; |
| |
| val = elfNN_aarch64_bfd_reloc_from_type (r_type); |
| howto = elfNN_aarch64_howto_from_bfd_reloc (val); |
| |
| if (howto != NULL) |
| return howto; |
| |
| bfd_set_error (bfd_error_bad_value); |
| return NULL; |
| } |
| |
| static void |
| elfNN_aarch64_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *bfd_reloc, |
| Elf_Internal_Rela *elf_reloc) |
| { |
| unsigned int r_type; |
| |
| r_type = ELFNN_R_TYPE (elf_reloc->r_info); |
| bfd_reloc->howto = elfNN_aarch64_howto_from_type (r_type); |
| } |
| |
| static reloc_howto_type * |
| elfNN_aarch64_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
| bfd_reloc_code_real_type code) |
| { |
| reloc_howto_type *howto = elfNN_aarch64_howto_from_bfd_reloc (code); |
| |
| if (howto != NULL) |
| return howto; |
| |
| bfd_set_error (bfd_error_bad_value); |
| return NULL; |
| } |
| |
| static reloc_howto_type * |
| elfNN_aarch64_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
| const char *r_name) |
| { |
| unsigned int i; |
| |
| for (i = 1; i < ARRAY_SIZE (elfNN_aarch64_howto_table) - 1; ++i) |
| if (elfNN_aarch64_howto_table[i].name != NULL |
| && strcasecmp (elfNN_aarch64_howto_table[i].name, r_name) == 0) |
| return &elfNN_aarch64_howto_table[i]; |
| |
| return NULL; |
| } |
| |
| #define TARGET_LITTLE_SYM aarch64_elfNN_le_vec |
| #define TARGET_LITTLE_NAME "elfNN-littleaarch64" |
| #define TARGET_BIG_SYM aarch64_elfNN_be_vec |
| #define TARGET_BIG_NAME "elfNN-bigaarch64" |
| |
| /* The linker script knows the section names for placement. |
| The entry_names are used to do simple name mangling on the stubs. |
| Given a function name, and its type, the stub can be found. The |
| name can be changed. The only requirement is the %s be present. */ |
| #define STUB_ENTRY_NAME "__%s_veneer" |
| |
| /* The name of the dynamic interpreter. This is put in the .interp |
| section. */ |
| #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1" |
| |
| #define AARCH64_MAX_FWD_BRANCH_OFFSET \ |
| (((1 << 25) - 1) << 2) |
| #define AARCH64_MAX_BWD_BRANCH_OFFSET \ |
| (-((1 << 25) << 2)) |
| |
| #define AARCH64_MAX_ADRP_IMM ((1 << 20) - 1) |
| #define AARCH64_MIN_ADRP_IMM (-(1 << 20)) |
| |
| static int |
| aarch64_valid_for_adrp_p (bfd_vma value, bfd_vma place) |
| { |
| bfd_signed_vma offset = (bfd_signed_vma) (PG (value) - PG (place)) >> 12; |
| return offset <= AARCH64_MAX_ADRP_IMM && offset >= AARCH64_MIN_ADRP_IMM; |
| } |
| |
| static int |
| aarch64_valid_branch_p (bfd_vma value, bfd_vma place) |
| { |
| bfd_signed_vma offset = (bfd_signed_vma) (value - place); |
| return (offset <= AARCH64_MAX_FWD_BRANCH_OFFSET |
| && offset >= AARCH64_MAX_BWD_BRANCH_OFFSET); |
| } |
| |
| static const uint32_t aarch64_adrp_branch_stub [] = |
| { |
| 0x90000010, /* adrp ip0, X */ |
| /* R_AARCH64_ADR_HI21_PCREL(X) */ |
| 0x91000210, /* add ip0, ip0, :lo12:X */ |
| /* R_AARCH64_ADD_ABS_LO12_NC(X) */ |
| 0xd61f0200, /* br ip0 */ |
| }; |
| |
| static const uint32_t aarch64_long_branch_stub[] = |
| { |
| #if ARCH_SIZE == 64 |
| 0x58000090, /* ldr ip0, 1f */ |
| #else |
| 0x18000090, /* ldr wip0, 1f */ |
| #endif |
| 0x10000011, /* adr ip1, #0 */ |
| 0x8b110210, /* add ip0, ip0, ip1 */ |
| 0xd61f0200, /* br ip0 */ |
| 0x00000000, /* 1: .xword or .word |
| R_AARCH64_PRELNN(X) + 12 |
| */ |
| 0x00000000, |
| }; |
| |
| static const uint32_t aarch64_erratum_835769_stub[] = |
| { |
| 0x00000000, /* Placeholder for multiply accumulate. */ |
| 0x14000000, /* b <label> */ |
| }; |
| |
| static const uint32_t aarch64_erratum_843419_stub[] = |
| { |
| 0x00000000, /* Placeholder for LDR instruction. */ |
| 0x14000000, /* b <label> */ |
| }; |
| |
| /* Section name for stubs is the associated section name plus this |
| string. */ |
| #define STUB_SUFFIX ".stub" |
| |
| enum elf_aarch64_stub_type |
| { |
| aarch64_stub_none, |
| aarch64_stub_adrp_branch, |
| aarch64_stub_long_branch, |
| aarch64_stub_erratum_835769_veneer, |
| aarch64_stub_erratum_843419_veneer, |
| }; |
| |
| struct elf_aarch64_stub_hash_entry |
| { |
| /* Base hash table entry structure. */ |
| struct bfd_hash_entry root; |
| |
| /* The stub section. */ |
| asection *stub_sec; |
| |
| /* Offset within stub_sec of the beginning of this stub. */ |
| bfd_vma stub_offset; |
| |
| /* Given the symbol's value and its section we can determine its final |
| value when building the stubs (so the stub knows where to jump). */ |
| bfd_vma target_value; |
| asection *target_section; |
| |
| enum elf_aarch64_stub_type stub_type; |
| |
| /* The symbol table entry, if any, that this was derived from. */ |
| struct elf_aarch64_link_hash_entry *h; |
| |
| /* Destination symbol type */ |
| unsigned char st_type; |
| |
| /* Where this stub is being called from, or, in the case of combined |
| stub sections, the first input section in the group. */ |
| asection *id_sec; |
| |
| /* The name for the local symbol at the start of this stub. The |
| stub name in the hash table has to be unique; this does not, so |
| it can be friendlier. */ |
| char *output_name; |
| |
| /* The instruction which caused this stub to be generated (only valid for |
| erratum 835769 workaround stubs at present). */ |
| uint32_t veneered_insn; |
| |
| /* In an erratum 843419 workaround stub, the ADRP instruction offset. */ |
| bfd_vma adrp_offset; |
| }; |
| |
| /* Used to build a map of a section. This is required for mixed-endian |
| code/data. */ |
| |
| typedef struct elf_elf_section_map |
| { |
| bfd_vma vma; |
| char type; |
| } |
| elf_aarch64_section_map; |
| |
| |
| typedef struct _aarch64_elf_section_data |
| { |
| struct bfd_elf_section_data elf; |
| unsigned int mapcount; |
| unsigned int mapsize; |
| elf_aarch64_section_map *map; |
| } |
| _aarch64_elf_section_data; |
| |
| #define elf_aarch64_section_data(sec) \ |
| ((_aarch64_elf_section_data *) elf_section_data (sec)) |
| |
| /* The size of the thread control block which is defined to be two pointers. */ |
| #define TCB_SIZE (ARCH_SIZE/8)*2 |
| |
| struct elf_aarch64_local_symbol |
| { |
| unsigned int got_type; |
| bfd_signed_vma got_refcount; |
| bfd_vma got_offset; |
| |
| /* Offset of the GOTPLT entry reserved for the TLS descriptor. The |
| offset is from the end of the jump table and reserved entries |
| within the PLTGOT. |
| |
| The magic value (bfd_vma) -1 indicates that an offset has not be |
| allocated. */ |
| bfd_vma tlsdesc_got_jump_table_offset; |
| }; |
| |
| struct elf_aarch64_obj_tdata |
| { |
| struct elf_obj_tdata root; |
| |
| /* local symbol descriptors */ |
| struct elf_aarch64_local_symbol *locals; |
| |
| /* Zero to warn when linking objects with incompatible enum sizes. */ |
| int no_enum_size_warning; |
| |
| /* Zero to warn when linking objects with incompatible wchar_t sizes. */ |
| int no_wchar_size_warning; |
| }; |
| |
| #define elf_aarch64_tdata(bfd) \ |
| ((struct elf_aarch64_obj_tdata *) (bfd)->tdata.any) |
| |
| #define elf_aarch64_locals(bfd) (elf_aarch64_tdata (bfd)->locals) |
| |
| #define is_aarch64_elf(bfd) \ |
| (bfd_get_flavour (bfd) == bfd_target_elf_flavour \ |
| && elf_tdata (bfd) != NULL \ |
| && elf_object_id (bfd) == AARCH64_ELF_DATA) |
| |
| static bfd_boolean |
| elfNN_aarch64_mkobject (bfd *abfd) |
| { |
| return bfd_elf_allocate_object (abfd, sizeof (struct elf_aarch64_obj_tdata), |
| AARCH64_ELF_DATA); |
| } |
| |
| #define elf_aarch64_hash_entry(ent) \ |
| ((struct elf_aarch64_link_hash_entry *)(ent)) |
| |
| #define GOT_UNKNOWN 0 |
| #define GOT_NORMAL 1 |
| #define GOT_TLS_GD 2 |
| #define GOT_TLS_IE 4 |
| #define GOT_TLSDESC_GD 8 |
| |
| #define GOT_TLS_GD_ANY_P(type) ((type & GOT_TLS_GD) || (type & GOT_TLSDESC_GD)) |
| |
| /* AArch64 ELF linker hash entry. */ |
| struct elf_aarch64_link_hash_entry |
| { |
| struct elf_link_hash_entry root; |
| |
| /* Track dynamic relocs copied for this symbol. */ |
| struct elf_dyn_relocs *dyn_relocs; |
| |
| /* Since PLT entries have variable size, we need to record the |
| index into .got.plt instead of recomputing it from the PLT |
| offset. */ |
| bfd_signed_vma plt_got_offset; |
| |
| /* Bit mask representing the type of GOT entry(s) if any required by |
| this symbol. */ |
| unsigned int got_type; |
| |
| /* A pointer to the most recently used stub hash entry against this |
| symbol. */ |
| struct elf_aarch64_stub_hash_entry *stub_cache; |
| |
| /* Offset of the GOTPLT entry reserved for the TLS descriptor. The offset |
| is from the end of the jump table and reserved entries within the PLTGOT. |
| |
| The magic value (bfd_vma) -1 indicates that an offset has not |
| be allocated. */ |
| bfd_vma tlsdesc_got_jump_table_offset; |
| }; |
| |
| static unsigned int |
| elfNN_aarch64_symbol_got_type (struct elf_link_hash_entry *h, |
| bfd *abfd, |
| unsigned long r_symndx) |
| { |
| if (h) |
| return elf_aarch64_hash_entry (h)->got_type; |
| |
| if (! elf_aarch64_locals (abfd)) |
| return GOT_UNKNOWN; |
| |
| return elf_aarch64_locals (abfd)[r_symndx].got_type; |
| } |
| |
| /* Get the AArch64 elf linker hash table from a link_info structure. */ |
| #define elf_aarch64_hash_table(info) \ |
| ((struct elf_aarch64_link_hash_table *) ((info)->hash)) |
| |
| #define aarch64_stub_hash_lookup(table, string, create, copy) \ |
| ((struct elf_aarch64_stub_hash_entry *) \ |
| bfd_hash_lookup ((table), (string), (create), (copy))) |
| |
| /* AArch64 ELF linker hash table. */ |
| struct elf_aarch64_link_hash_table |
| { |
| /* The main hash table. */ |
| struct elf_link_hash_table root; |
| |
| /* Nonzero to force PIC branch veneers. */ |
| int pic_veneer; |
| |
| /* Fix erratum 835769. */ |
| int fix_erratum_835769; |
| |
| /* Fix erratum 843419. */ |
| int fix_erratum_843419; |
| |
| /* Enable ADRP->ADR rewrite for erratum 843419 workaround. */ |
| int fix_erratum_843419_adr; |
| |
| /* The number of bytes in the initial entry in the PLT. */ |
| bfd_size_type plt_header_size; |
| |
| /* The number of bytes in the subsequent PLT etries. */ |
| bfd_size_type plt_entry_size; |
| |
| /* Short-cuts to get to dynamic linker sections. */ |
| asection *sdynbss; |
| asection *srelbss; |
| |
| /* Small local sym cache. */ |
| struct sym_cache sym_cache; |
| |
| /* For convenience in allocate_dynrelocs. */ |
| bfd *obfd; |
| |
| /* The amount of space used by the reserved portion of the sgotplt |
| section, plus whatever space is used by the jump slots. */ |
| bfd_vma sgotplt_jump_table_size; |
| |
| /* The stub hash table. */ |
| struct bfd_hash_table stub_hash_table; |
| |
| /* Linker stub bfd. */ |
| bfd *stub_bfd; |
| |
| /* Linker call-backs. */ |
| asection *(*add_stub_section) (const char *, asection *); |
| void (*layout_sections_again) (void); |
| |
| /* Array to keep track of which stub sections have been created, and |
| information on stub grouping. */ |
| struct map_stub |
| { |
| /* This is the section to which stubs in the group will be |
| attached. */ |
| asection *link_sec; |
| /* The stub section. */ |
| asection *stub_sec; |
| } *stub_group; |
| |
| /* Assorted information used by elfNN_aarch64_size_stubs. */ |
| unsigned int bfd_count; |
| int top_index; |
| asection **input_list; |
| |
| /* The offset into splt of the PLT entry for the TLS descriptor |
| resolver. Special values are 0, if not necessary (or not found |
| to be necessary yet), and -1 if needed but not determined |
| yet. */ |
| bfd_vma tlsdesc_plt; |
| |
| /* The GOT offset for the lazy trampoline. Communicated to the |
| loader via DT_TLSDESC_GOT. The magic value (bfd_vma) -1 |
| indicates an offset is not allocated. */ |
| bfd_vma dt_tlsdesc_got; |
| |
| /* Used by local STT_GNU_IFUNC symbols. */ |
| htab_t loc_hash_table; |
| void * loc_hash_memory; |
| }; |
| |
| /* Create an entry in an AArch64 ELF linker hash table. */ |
| |
| static struct bfd_hash_entry * |
| elfNN_aarch64_link_hash_newfunc (struct bfd_hash_entry *entry, |
| struct bfd_hash_table *table, |
| const char *string) |
| { |
| struct elf_aarch64_link_hash_entry *ret = |
| (struct elf_aarch64_link_hash_entry *) entry; |
| |
| /* Allocate the structure if it has not already been allocated by a |
| subclass. */ |
| if (ret == NULL) |
| ret = bfd_hash_allocate (table, |
| sizeof (struct elf_aarch64_link_hash_entry)); |
| if (ret == NULL) |
| return (struct bfd_hash_entry *) ret; |
| |
| /* Call the allocation method of the superclass. */ |
| ret = ((struct elf_aarch64_link_hash_entry *) |
| _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret, |
| table, string)); |
| if (ret != NULL) |
| { |
| ret->dyn_relocs = NULL; |
| ret->got_type = GOT_UNKNOWN; |
| ret->plt_got_offset = (bfd_vma) - 1; |
| ret->stub_cache = NULL; |
| ret->tlsdesc_got_jump_table_offset = (bfd_vma) - 1; |
| } |
| |
| return (struct bfd_hash_entry *) ret; |
| } |
| |
| /* Initialize an entry in the stub hash table. */ |
| |
| static struct bfd_hash_entry * |
| stub_hash_newfunc (struct bfd_hash_entry *entry, |
| struct bfd_hash_table *table, const char *string) |
| { |
| /* Allocate the structure if it has not already been allocated by a |
| subclass. */ |
| if (entry == NULL) |
| { |
| entry = bfd_hash_allocate (table, |
| sizeof (struct |
| elf_aarch64_stub_hash_entry)); |
| if (entry == NULL) |
| return entry; |
| } |
| |
| /* Call the allocation method of the superclass. */ |
| entry = bfd_hash_newfunc (entry, table, string); |
| if (entry != NULL) |
| { |
| struct elf_aarch64_stub_hash_entry *eh; |
| |
| /* Initialize the local fields. */ |
| eh = (struct elf_aarch64_stub_hash_entry *) entry; |
| eh->adrp_offset = 0; |
| eh->stub_sec = NULL; |
| eh->stub_offset = 0; |
| eh->target_value = 0; |
| eh->target_section = NULL; |
| eh->stub_type = aarch64_stub_none; |
| eh->h = NULL; |
| eh->id_sec = NULL; |
| } |
| |
| return entry; |
| } |
| |
| /* Compute a hash of a local hash entry. We use elf_link_hash_entry |
| for local symbol so that we can handle local STT_GNU_IFUNC symbols |
| as global symbol. We reuse indx and dynstr_index for local symbol |
| hash since they aren't used by global symbols in this backend. */ |
| |
| static hashval_t |
| elfNN_aarch64_local_htab_hash (const void *ptr) |
| { |
| struct elf_link_hash_entry *h |
| = (struct elf_link_hash_entry *) ptr; |
| return ELF_LOCAL_SYMBOL_HASH (h->indx, h->dynstr_index); |
| } |
| |
| /* Compare local hash entries. */ |
| |
| static int |
| elfNN_aarch64_local_htab_eq (const void *ptr1, const void *ptr2) |
| { |
| struct elf_link_hash_entry *h1 |
| = (struct elf_link_hash_entry *) ptr1; |
| struct elf_link_hash_entry *h2 |
| = (struct elf_link_hash_entry *) ptr2; |
| |
| return h1->indx == h2->indx && h1->dynstr_index == h2->dynstr_index; |
| } |
| |
| /* Find and/or create a hash entry for local symbol. */ |
| |
| static struct elf_link_hash_entry * |
| elfNN_aarch64_get_local_sym_hash (struct elf_aarch64_link_hash_table *htab, |
| bfd *abfd, const Elf_Internal_Rela *rel, |
| bfd_boolean create) |
| { |
| struct elf_aarch64_link_hash_entry e, *ret; |
| asection *sec = abfd->sections; |
| hashval_t h = ELF_LOCAL_SYMBOL_HASH (sec->id, |
| ELFNN_R_SYM (rel->r_info)); |
| void **slot; |
| |
| e.root.indx = sec->id; |
| e.root.dynstr_index = ELFNN_R_SYM (rel->r_info); |
| slot = htab_find_slot_with_hash (htab->loc_hash_table, &e, h, |
| create ? INSERT : NO_INSERT); |
| |
| if (!slot) |
| return NULL; |
| |
| if (*slot) |
| { |
| ret = (struct elf_aarch64_link_hash_entry *) *slot; |
| return &ret->root; |
| } |
| |
| ret = (struct elf_aarch64_link_hash_entry *) |
| objalloc_alloc ((struct objalloc *) htab->loc_hash_memory, |
| sizeof (struct elf_aarch64_link_hash_entry)); |
| if (ret) |
| { |
| memset (ret, 0, sizeof (*ret)); |
| ret->root.indx = sec->id; |
| ret->root.dynstr_index = ELFNN_R_SYM (rel->r_info); |
| ret->root.dynindx = -1; |
| *slot = ret; |
| } |
| return &ret->root; |
| } |
| |
| /* Copy the extra info we tack onto an elf_link_hash_entry. */ |
| |
| static void |
| elfNN_aarch64_copy_indirect_symbol (struct bfd_link_info *info, |
| struct elf_link_hash_entry *dir, |
| struct elf_link_hash_entry *ind) |
| { |
| struct elf_aarch64_link_hash_entry *edir, *eind; |
| |
| edir = (struct elf_aarch64_link_hash_entry *) dir; |
| eind = (struct elf_aarch64_link_hash_entry *) ind; |
| |
| if (eind->dyn_relocs != NULL) |
| { |
| if (edir->dyn_relocs != NULL) |
| { |
| struct elf_dyn_relocs **pp; |
| struct elf_dyn_relocs *p; |
| |
| /* Add reloc counts against the indirect sym to the direct sym |
| list. Merge any entries against the same section. */ |
| for (pp = &eind->dyn_relocs; (p = *pp) != NULL;) |
| { |
| struct elf_dyn_relocs *q; |
| |
| for (q = edir->dyn_relocs; q != NULL; q = q->next) |
| if (q->sec == p->sec) |
| { |
| q->pc_count += p->pc_count; |
| q->count += p->count; |
| *pp = p->next; |
| break; |
| } |
| if (q == NULL) |
| pp = &p->next; |
| } |
| *pp = edir->dyn_relocs; |
| } |
| |
| edir->dyn_relocs = eind->dyn_relocs; |
| eind->dyn_relocs = NULL; |
| } |
| |
| if (ind->root.type == bfd_link_hash_indirect) |
| { |
| /* Copy over PLT info. */ |
| if (dir->got.refcount <= 0) |
| { |
| edir->got_type = eind->got_type; |
| eind->got_type = GOT_UNKNOWN; |
| } |
| } |
| |
| _bfd_elf_link_hash_copy_indirect (info, dir, ind); |
| } |
| |
| /* Destroy an AArch64 elf linker hash table. */ |
| |
| static void |
| elfNN_aarch64_link_hash_table_free (bfd *obfd) |
| { |
| struct elf_aarch64_link_hash_table *ret |
| = (struct elf_aarch64_link_hash_table *) obfd->link.hash; |
| |
| if (ret->loc_hash_table) |
| htab_delete (ret->loc_hash_table); |
| if (ret->loc_hash_memory) |
| objalloc_free ((struct objalloc *) ret->loc_hash_memory); |
| |
| bfd_hash_table_free (&ret->stub_hash_table); |
| _bfd_elf_link_hash_table_free (obfd); |
| } |
| |
| /* Create an AArch64 elf linker hash table. */ |
| |
| static struct bfd_link_hash_table * |
| elfNN_aarch64_link_hash_table_create (bfd *abfd) |
| { |
| struct elf_aarch64_link_hash_table *ret; |
| bfd_size_type amt = sizeof (struct elf_aarch64_link_hash_table); |
| |
| ret = bfd_zmalloc (amt); |
| if (ret == NULL) |
| return NULL; |
| |
| if (!_bfd_elf_link_hash_table_init |
| (&ret->root, abfd, elfNN_aarch64_link_hash_newfunc, |
| sizeof (struct elf_aarch64_link_hash_entry), AARCH64_ELF_DATA)) |
| { |
| free (ret); |
| return NULL; |
| } |
| |
| ret->plt_header_size = PLT_ENTRY_SIZE; |
| ret->plt_entry_size = PLT_SMALL_ENTRY_SIZE; |
| ret->obfd = abfd; |
| ret->dt_tlsdesc_got = (bfd_vma) - 1; |
| |
| if (!bfd_hash_table_init (&ret->stub_hash_table, stub_hash_newfunc, |
| sizeof (struct elf_aarch64_stub_hash_entry))) |
| { |
| _bfd_elf_link_hash_table_free (abfd); |
| return NULL; |
| } |
| |
| ret->loc_hash_table = htab_try_create (1024, |
| elfNN_aarch64_local_htab_hash, |
| elfNN_aarch64_local_htab_eq, |
| NULL); |
| ret->loc_hash_memory = objalloc_create (); |
| if (!ret->loc_hash_table || !ret->loc_hash_memory) |
| { |
| elfNN_aarch64_link_hash_table_free (abfd); |
| return NULL; |
| } |
| ret->root.root.hash_table_free = elfNN_aarch64_link_hash_table_free; |
| |
| return &ret->root.root; |
| } |
| |
| static bfd_boolean |
| aarch64_relocate (unsigned int r_type, bfd *input_bfd, asection *input_section, |
| bfd_vma offset, bfd_vma value) |
| { |
| reloc_howto_type *howto; |
| bfd_vma place; |
| |
| howto = elfNN_aarch64_howto_from_type (r_type); |
| place = (input_section->output_section->vma + input_section->output_offset |
| + offset); |
| |
| r_type = elfNN_aarch64_bfd_reloc_from_type (r_type); |
| value = _bfd_aarch64_elf_resolve_relocation (r_type, place, value, 0, FALSE); |
| return _bfd_aarch64_elf_put_addend (input_bfd, |
| input_section->contents + offset, r_type, |
| howto, value); |
| } |
| |
| static enum elf_aarch64_stub_type |
| aarch64_select_branch_stub (bfd_vma value, bfd_vma place) |
| { |
| if (aarch64_valid_for_adrp_p (value, place)) |
| return aarch64_stub_adrp_branch; |
| return aarch64_stub_long_branch; |
| } |
| |
| /* Determine the type of stub needed, if any, for a call. */ |
| |
| static enum elf_aarch64_stub_type |
| aarch64_type_of_stub (struct bfd_link_info *info, |
| asection *input_sec, |
| const Elf_Internal_Rela *rel, |
| unsigned char st_type, |
| struct elf_aarch64_link_hash_entry *hash, |
| bfd_vma destination) |
| { |
| bfd_vma location; |
| bfd_signed_vma branch_offset; |
| unsigned int r_type; |
| struct elf_aarch64_link_hash_table *globals; |
| enum elf_aarch64_stub_type stub_type = aarch64_stub_none; |
| bfd_boolean via_plt_p; |
| |
| if (st_type != STT_FUNC) |
| return stub_type; |
| |
| globals = elf_aarch64_hash_table (info); |
| via_plt_p = (globals->root.splt != NULL && hash != NULL |
| && hash->root.plt.offset != (bfd_vma) - 1); |
| |
| if (via_plt_p) |
| return stub_type; |
| |
| /* Determine where the call point is. */ |
| location = (input_sec->output_offset |
| + input_sec->output_section->vma + rel->r_offset); |
| |
| branch_offset = (bfd_signed_vma) (destination - location); |
| |
| r_type = ELFNN_R_TYPE (rel->r_info); |
| |
| /* We don't want to redirect any old unconditional jump in this way, |
| only one which is being used for a sibcall, where it is |
| acceptable for the IP0 and IP1 registers to be clobbered. */ |
| if ((r_type == AARCH64_R (CALL26) || r_type == AARCH64_R (JUMP26)) |
| && (branch_offset > AARCH64_MAX_FWD_BRANCH_OFFSET |
| || branch_offset < AARCH64_MAX_BWD_BRANCH_OFFSET)) |
| { |
| stub_type = aarch64_stub_long_branch; |
| } |
| |
| return stub_type; |
| } |
| |
| /* Build a name for an entry in the stub hash table. */ |
| |
| static char * |
| elfNN_aarch64_stub_name (const asection *input_section, |
| const asection *sym_sec, |
| const struct elf_aarch64_link_hash_entry *hash, |
| const Elf_Internal_Rela *rel) |
| { |
| char *stub_name; |
| bfd_size_type len; |
| |
| if (hash) |
| { |
| len = 8 + 1 + strlen (hash->root.root.root.string) + 1 + 16 + 1; |
| stub_name = bfd_malloc (len); |
| if (stub_name != NULL) |
| snprintf (stub_name, len, "%08x_%s+%" BFD_VMA_FMT "x", |
| (unsigned int) input_section->id, |
| hash->root.root.root.string, |
| rel->r_addend); |
| } |
| else |
| { |
| len = 8 + 1 + 8 + 1 + 8 + 1 + 16 + 1; |
| stub_name = bfd_malloc (len); |
| if (stub_name != NULL) |
| snprintf (stub_name, len, "%08x_%x:%x+%" BFD_VMA_FMT "x", |
| (unsigned int) input_section->id, |
| (unsigned int) sym_sec->id, |
| (unsigned int) ELFNN_R_SYM (rel->r_info), |
| rel->r_addend); |
| } |
| |
| return stub_name; |
| } |
| |
| /* Look up an entry in the stub hash. Stub entries are cached because |
| creating the stub name takes a bit of time. */ |
| |
| static struct elf_aarch64_stub_hash_entry * |
| elfNN_aarch64_get_stub_entry (const asection *input_section, |
| const asection *sym_sec, |
| struct elf_link_hash_entry *hash, |
| const Elf_Internal_Rela *rel, |
| struct elf_aarch64_link_hash_table *htab) |
| { |
| struct elf_aarch64_stub_hash_entry *stub_entry; |
| struct elf_aarch64_link_hash_entry *h = |
| (struct elf_aarch64_link_hash_entry *) hash; |
| const asection *id_sec; |
| |
| if ((input_section->flags & SEC_CODE) == 0) |
| return NULL; |
| |
| /* If this input section is part of a group of sections sharing one |
| stub section, then use the id of the first section in the group. |
| Stub names need to include a section id, as there may well be |
| more than one stub used to reach say, printf, and we need to |
| distinguish between them. */ |
| id_sec = htab->stub_group[input_section->id].link_sec; |
| |
| if (h != NULL && h->stub_cache != NULL |
| && h->stub_cache->h == h && h->stub_cache->id_sec == id_sec) |
| { |
| stub_entry = h->stub_cache; |
| } |
| else |
| { |
| char *stub_name; |
| |
| stub_name = elfNN_aarch64_stub_name (id_sec, sym_sec, h, rel); |
| if (stub_name == NULL) |
| return NULL; |
| |
| stub_entry = aarch64_stub_hash_lookup (&htab->stub_hash_table, |
| stub_name, FALSE, FALSE); |
| if (h != NULL) |
| h->stub_cache = stub_entry; |
| |
| free (stub_name); |
| } |
| |
| return stub_entry; |
| } |
| |
| |
| /* Create a stub section. */ |
| |
| static asection * |
| _bfd_aarch64_create_stub_section (asection *section, |
| struct elf_aarch64_link_hash_table *htab) |
| { |
| size_t namelen; |
| bfd_size_type len; |
| char *s_name; |
| |
| namelen = strlen (section->name); |
| len = namelen + sizeof (STUB_SUFFIX); |
| s_name = bfd_alloc (htab->stub_bfd, len); |
| if (s_name == NULL) |
| return NULL; |
| |
| memcpy (s_name, section->name, namelen); |
| memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX)); |
| return (*htab->add_stub_section) (s_name, section); |
| } |
| |
| |
| /* Find or create a stub section for a link section. |
| |
| Fix or create the stub section used to collect stubs attached to |
| the specified link section. */ |
| |
| static asection * |
| _bfd_aarch64_get_stub_for_link_section (asection *link_section, |
| struct elf_aarch64_link_hash_table *htab) |
| { |
| if (htab->stub_group[link_section->id].stub_sec == NULL) |
| htab->stub_group[link_section->id].stub_sec |
| = _bfd_aarch64_create_stub_section (link_section, htab); |
| return htab->stub_group[link_section->id].stub_sec; |
| } |
| |
| |
| /* Find or create a stub section in the stub group for an input |
| section. */ |
| |
| static asection * |
| _bfd_aarch64_create_or_find_stub_sec (asection *section, |
| struct elf_aarch64_link_hash_table *htab) |
| { |
| asection *link_sec = htab->stub_group[section->id].link_sec; |
| return _bfd_aarch64_get_stub_for_link_section (link_sec, htab); |
| } |
| |
| |
| /* Add a new stub entry in the stub group associated with an input |
| section to the stub hash. Not all fields of the new stub entry are |
| initialised. */ |
| |
| static struct elf_aarch64_stub_hash_entry * |
| _bfd_aarch64_add_stub_entry_in_group (const char *stub_name, |
| asection *section, |
| struct elf_aarch64_link_hash_table *htab) |
| { |
| asection *link_sec; |
| asection *stub_sec; |
| struct elf_aarch64_stub_hash_entry *stub_entry; |
| |
| link_sec = htab->stub_group[section->id].link_sec; |
| stub_sec = _bfd_aarch64_create_or_find_stub_sec (section, htab); |
| |
| /* Enter this entry into the linker stub hash table. */ |
| stub_entry = aarch64_stub_hash_lookup (&htab->stub_hash_table, stub_name, |
| TRUE, FALSE); |
| if (stub_entry == NULL) |
| { |
| (*_bfd_error_handler) (_("%s: cannot create stub entry %s"), |
| section->owner, stub_name); |
| return NULL; |
| } |
| |
| stub_entry->stub_sec = stub_sec; |
| stub_entry->stub_offset = 0; |
| stub_entry->id_sec = link_sec; |
| |
| return stub_entry; |
| } |
| |
| /* Add a new stub entry in the final stub section to the stub hash. |
| Not all fields of the new stub entry are initialised. */ |
| |
| static struct elf_aarch64_stub_hash_entry * |
| _bfd_aarch64_add_stub_entry_after (const char *stub_name, |
| asection *link_section, |
| struct elf_aarch64_link_hash_table *htab) |
| { |
| asection *stub_sec; |
| struct elf_aarch64_stub_hash_entry *stub_entry; |
| |
| stub_sec = _bfd_aarch64_get_stub_for_link_section (link_section, htab); |
| stub_entry = aarch64_stub_hash_lookup (&htab->stub_hash_table, stub_name, |
| TRUE, FALSE); |
| if (stub_entry == NULL) |
| { |
| (*_bfd_error_handler) (_("cannot create stub entry %s"), stub_name); |
| return NULL; |
| } |
| |
| stub_entry->stub_sec = stub_sec; |
| stub_entry->stub_offset = 0; |
| stub_entry->id_sec = link_section; |
| |
| return stub_entry; |
| } |
| |
| |
| static bfd_boolean |
| aarch64_build_one_stub (struct bfd_hash_entry *gen_entry, |
| void *in_arg ATTRIBUTE_UNUSED) |
| { |
| struct elf_aarch64_stub_hash_entry *stub_entry; |
| asection *stub_sec; |
| bfd *stub_bfd; |
| bfd_byte *loc; |
| bfd_vma sym_value; |
| bfd_vma veneered_insn_loc; |
| bfd_vma veneer_entry_loc; |
| bfd_signed_vma branch_offset = 0; |
| unsigned int template_size; |
| const uint32_t *template; |
| unsigned int i; |
| |
| /* Massage our args to the form they really have. */ |
| stub_entry = (struct elf_aarch64_stub_hash_entry *) gen_entry; |
| |
| stub_sec = stub_entry->stub_sec; |
| |
| /* Make a note of the offset within the stubs for this entry. */ |
| stub_entry->stub_offset = stub_sec->size; |
| loc = stub_sec->contents + stub_entry->stub_offset; |
| |
| stub_bfd = stub_sec->owner; |
| |
| /* This is the address of the stub destination. */ |
| sym_value = (stub_entry->target_value |
| + stub_entry->target_section->output_offset |
| + stub_entry->target_section->output_section->vma); |
| |
| if (stub_entry->stub_type == aarch64_stub_long_branch) |
| { |
| bfd_vma place = (stub_entry->stub_offset + stub_sec->output_section->vma |
| + stub_sec->output_offset); |
| |
| /* See if we can relax the stub. */ |
| if (aarch64_valid_for_adrp_p (sym_value, place)) |
| stub_entry->stub_type = aarch64_select_branch_stub (sym_value, place); |
| } |
| |
| switch (stub_entry->stub_type) |
| { |
| case aarch64_stub_adrp_branch: |
| template = aarch64_adrp_branch_stub; |
| template_size = sizeof (aarch64_adrp_branch_stub); |
| break; |
| case aarch64_stub_long_branch: |
| template = aarch64_long_branch_stub; |
| template_size = sizeof (aarch64_long_branch_stub); |
| break; |
| case aarch64_stub_erratum_835769_veneer: |
| template = aarch64_erratum_835769_stub; |
| template_size = sizeof (aarch64_erratum_835769_stub); |
| break; |
| case aarch64_stub_erratum_843419_veneer: |
| template = aarch64_erratum_843419_stub; |
| template_size = sizeof (aarch64_erratum_843419_stub); |
| break; |
| default: |
| BFD_FAIL (); |
| return FALSE; |
| } |
| |
| for (i = 0; i < (template_size / sizeof template[0]); i++) |
| { |
| bfd_putl32 (template[i], loc); |
| loc += 4; |
| } |
| |
| template_size = (template_size + 7) & ~7; |
| stub_sec->size += template_size; |
| |
| switch (stub_entry->stub_type) |
| { |
| case aarch64_stub_adrp_branch: |
| if (aarch64_relocate (AARCH64_R (ADR_PREL_PG_HI21), stub_bfd, stub_sec, |
| stub_entry->stub_offset, sym_value)) |
| /* The stub would not have been relaxed if the offset was out |
| of range. */ |
| BFD_FAIL (); |
| |
| _bfd_final_link_relocate |
| (elfNN_aarch64_howto_from_type (AARCH64_R (ADD_ABS_LO12_NC)), |
| stub_bfd, |
| stub_sec, |
| stub_sec->contents, |
| stub_entry->stub_offset + 4, |
| sym_value, |
| 0); |
| break; |
| |
| case aarch64_stub_long_branch: |
| /* We want the value relative to the address 12 bytes back from the |
| value itself. */ |
| _bfd_final_link_relocate (elfNN_aarch64_howto_from_type |
| (AARCH64_R (PRELNN)), stub_bfd, stub_sec, |
| stub_sec->contents, |
| stub_entry->stub_offset + 16, |
| sym_value + 12, 0); |
| break; |
| |
| case aarch64_stub_erratum_835769_veneer: |
| veneered_insn_loc = stub_entry->target_section->output_section->vma |
| + stub_entry->target_section->output_offset |
| + stub_entry->target_value; |
| veneer_entry_loc = stub_entry->stub_sec->output_section->vma |
| + stub_entry->stub_sec->output_offset |
| + stub_entry->stub_offset; |
| branch_offset = veneered_insn_loc - veneer_entry_loc; |
| branch_offset >>= 2; |
| branch_offset &= 0x3ffffff; |
| bfd_putl32 (stub_entry->veneered_insn, |
| stub_sec->contents + stub_entry->stub_offset); |
| bfd_putl32 (template[1] | branch_offset, |
| stub_sec->contents + stub_entry->stub_offset + 4); |
| break; |
| |
| case aarch64_stub_erratum_843419_veneer: |
| if (aarch64_relocate (AARCH64_R (JUMP26), stub_bfd, stub_sec, |
| stub_entry->stub_offset + 4, sym_value + 4)) |
| BFD_FAIL (); |
| break; |
| |
| default: |
| break; |
| } |
| |
| return TRUE; |
| } |
| |
| /* As above, but don't actually build the stub. Just bump offset so |
| we know stub section sizes. */ |
| |
| static bfd_boolean |
| aarch64_size_one_stub (struct bfd_hash_entry *gen_entry, |
| void *in_arg ATTRIBUTE_UNUSED) |
| { |
| struct elf_aarch64_stub_hash_entry *stub_entry; |
| int size; |
| |
| /* Massage our args to the form they really have. */ |
| stub_entry = (struct elf_aarch64_stub_hash_entry *) gen_entry; |
| |
| switch (stub_entry->stub_type) |
| { |
| case aarch64_stub_adrp_branch: |
| size = sizeof (aarch64_adrp_branch_stub); |
| break; |
| case aarch64_stub_long_branch: |
| size = sizeof (aarch64_long_branch_stub); |
| break; |
| case aarch64_stub_erratum_835769_veneer: |
| size = sizeof (aarch64_erratum_835769_stub); |
| break; |
| case aarch64_stub_erratum_843419_veneer: |
| size = sizeof (aarch64_erratum_843419_stub); |
| break; |
| default: |
| BFD_FAIL (); |
| return FALSE; |
| break; |
| } |
| |
| size = (size + 7) & ~7; |
| stub_entry->stub_sec->size += size; |
| return TRUE; |
| } |
| |
| /* External entry points for sizing and building linker stubs. */ |
| |
| /* Set up various things so that we can make a list of input sections |
| for each output section included in the link. Returns -1 on error, |
| 0 when no stubs will be needed, and 1 on success. */ |
| |
| int |
| elfNN_aarch64_setup_section_lists (bfd *output_bfd, |
| struct bfd_link_info *info) |
| { |
| bfd *input_bfd; |
| unsigned int bfd_count; |
| int top_id, top_index; |
| asection *section; |
| asection **input_list, **list; |
| bfd_size_type amt; |
| struct elf_aarch64_link_hash_table *htab = |
| elf_aarch64_hash_table (info); |
| |
| if (!is_elf_hash_table (htab)) |
| return 0; |
| |
| /* Count the number of input BFDs and find the top input section id. */ |
| for (input_bfd = info->input_bfds, bfd_count = 0, top_id = 0; |
| input_bfd != NULL; input_bfd = input_bfd->link.next) |
| { |
| bfd_count += 1; |
| for (section = input_bfd->sections; |
| section != NULL; section = section->next) |
| { |
| if (top_id < section->id) |
| top_id = section->id; |
| } |
| } |
| htab->bfd_count = bfd_count; |
| |
| amt = sizeof (struct map_stub) * (top_id + 1); |
| htab->stub_group = bfd_zmalloc (amt); |
| if (htab->stub_group == NULL) |
| return -1; |
| |
| /* We can't use output_bfd->section_count here to find the top output |
| section index as some sections may have been removed, and |
| _bfd_strip_section_from_output doesn't renumber the indices. */ |
| for (section = output_bfd->sections, top_index = 0; |
| section != NULL; section = section->next) |
| { |
| if (top_index < section->index) |
| top_index = section->index; |
| } |
| |
| htab->top_index = top_index; |
| amt = sizeof (asection *) * (top_index + 1); |
| input_list = bfd_malloc (amt); |
| htab->input_list = input_list; |
| if (input_list == NULL) |
| return -1; |
| |
| /* For sections we aren't interested in, mark their entries with a |
| value we can check later. */ |
| list = input_list + top_index; |
| do |
| *list = bfd_abs_section_ptr; |
| while (list-- != input_list); |
| |
| for (section = output_bfd->sections; |
| section != NULL; section = section->next) |
| { |
| if ((section->flags & SEC_CODE) != 0) |
| input_list[section->index] = NULL; |
| } |
| |
| return 1; |
| } |
| |
| /* Used by elfNN_aarch64_next_input_section and group_sections. */ |
| #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec) |
| |
| /* The linker repeatedly calls this function for each input section, |
| in the order that input sections are linked into output sections. |
| Build lists of input sections to determine groupings between which |
| we may insert linker stubs. */ |
| |
| void |
| elfNN_aarch64_next_input_section (struct bfd_link_info *info, asection *isec) |
| { |
| struct elf_aarch64_link_hash_table *htab = |
| elf_aarch64_hash_table (info); |
| |
| if (isec->output_section->index <= htab->top_index) |
| { |
| asection **list = htab->input_list + isec->output_section->index; |
| |
| if (*list != bfd_abs_section_ptr) |
| { |
| /* Steal the link_sec pointer for our list. */ |
| /* This happens to make the list in reverse order, |
| which is what we want. */ |
| PREV_SEC (isec) = *list; |
| *list = isec; |
| } |
| } |
| } |
| |
| /* See whether we can group stub sections together. Grouping stub |
| sections may result in fewer stubs. More importantly, we need to |
| put all .init* and .fini* stubs at the beginning of the .init or |
| .fini output sections respectively, because glibc splits the |
| _init and _fini functions into multiple parts. Putting a stub in |
| the middle of a function is not a good idea. */ |
| |
| static void |
| group_sections (struct elf_aarch64_link_hash_table *htab, |
| bfd_size_type stub_group_size, |
| bfd_boolean stubs_always_before_branch) |
| { |
| asection **list = htab->input_list + htab->top_index; |
| |
| do |
| { |
| asection *tail = *list; |
| |
| if (tail == bfd_abs_section_ptr) |
| continue; |
| |
| while (tail != NULL) |
| { |
| asection *curr; |
| asection *prev; |
| bfd_size_type total; |
| |
| curr = tail; |
| total = tail->size; |
| while ((prev = PREV_SEC (curr)) != NULL |
| && ((total += curr->output_offset - prev->output_offset) |
| < stub_group_size)) |
| curr = prev; |
| |
| /* OK, the size from the start of CURR to the end is less |
| than stub_group_size and thus can be handled by one stub |
| section. (Or the tail section is itself larger than |
| stub_group_size, in which case we may be toast.) |
| We should really be keeping track of the total size of |
| stubs added here, as stubs contribute to the final output |
| section size. */ |
| do |
| { |
| prev = PREV_SEC (tail); |
| /* Set up this stub group. */ |
| htab->stub_group[tail->id].link_sec = curr; |
| } |
| while (tail != curr && (tail = prev) != NULL); |
| |
| /* But wait, there's more! Input sections up to stub_group_size |
| bytes before the stub section can be handled by it too. */ |
| if (!stubs_always_before_branch) |
| { |
| total = 0; |
| while (prev != NULL |
| && ((total += tail->output_offset - prev->output_offset) |
| < stub_group_size)) |
| { |
| tail = prev; |
| prev = PREV_SEC (tail); |
| htab->stub_group[tail->id].link_sec = curr; |
| } |
| } |
| tail = prev; |
| } |
| } |
| while (list-- != htab->input_list); |
| |
| free (htab->input_list); |
| } |
| |
| #undef PREV_SEC |
| |
| #define AARCH64_BITS(x, pos, n) (((x) >> (pos)) & ((1 << (n)) - 1)) |
| |
| #define AARCH64_RT(insn) AARCH64_BITS (insn, 0, 5) |
| #define AARCH64_RT2(insn) AARCH64_BITS (insn, 10, 5) |
| #define AARCH64_RA(insn) AARCH64_BITS (insn, 10, 5) |
| #define AARCH64_RD(insn) AARCH64_BITS (insn, 0, 5) |
| #define AARCH64_RN(insn) AARCH64_BITS (insn, 5, 5) |
| #define AARCH64_RM(insn) AARCH64_BITS (insn, 16, 5) |
| |
| #define AARCH64_MAC(insn) (((insn) & 0xff000000) == 0x9b000000) |
| #define AARCH64_BIT(insn, n) AARCH64_BITS (insn, n, 1) |
| #define AARCH64_OP31(insn) AARCH64_BITS (insn, 21, 3) |
| #define AARCH64_ZR 0x1f |
| |
| /* All ld/st ops. See C4-182 of the ARM ARM. The encoding space for |
| LD_PCREL, LDST_RO, LDST_UI and LDST_UIMM cover prefetch ops. */ |
| |
| #define AARCH64_LD(insn) (AARCH64_BIT (insn, 22) == 1) |
| #define AARCH64_LDST(insn) (((insn) & 0x0a000000) == 0x08000000) |
| #define AARCH64_LDST_EX(insn) (((insn) & 0x3f000000) == 0x08000000) |
| #define AARCH64_LDST_PCREL(insn) (((insn) & 0x3b000000) == 0x18000000) |
| #define AARCH64_LDST_NAP(insn) (((insn) & 0x3b800000) == 0x28000000) |
| #define AARCH64_LDSTP_PI(insn) (((insn) & 0x3b800000) == 0x28800000) |
| #define AARCH64_LDSTP_O(insn) (((insn) & 0x3b800000) == 0x29000000) |
| #define AARCH64_LDSTP_PRE(insn) (((insn) & 0x3b800000) == 0x29800000) |
| #define AARCH64_LDST_UI(insn) (((insn) & 0x3b200c00) == 0x38000000) |
| #define AARCH64_LDST_PIIMM(insn) (((insn) & 0x3b200c00) == 0x38000400) |
| #define AARCH64_LDST_U(insn) (((insn) & 0x3b200c00) == 0x38000800) |
| #define AARCH64_LDST_PREIMM(insn) (((insn) & 0x3b200c00) == 0x38000c00) |
| #define AARCH64_LDST_RO(insn) (((insn) & 0x3b200c00) == 0x38200800) |
| #define AARCH64_LDST_UIMM(insn) (((insn) & 0x3b000000) == 0x39000000) |
| #define AARCH64_LDST_SIMD_M(insn) (((insn) & 0xbfbf0000) == 0x0c000000) |
| #define AARCH64_LDST_SIMD_M_PI(insn) (((insn) & 0xbfa00000) == 0x0c800000) |
| #define AARCH64_LDST_SIMD_S(insn) (((insn) & 0xbf9f0000) == 0x0d000000) |
| #define AARCH64_LDST_SIMD_S_PI(insn) (((insn) & 0xbf800000) == 0x0d800000) |
| |
| /* Classify an INSN if it is indeed a load/store. Return TRUE if INSN |
| is a load/store along with the Rt and Rtn. Return FALSE if not a |
| load/store. */ |
| |
| static bfd_boolean |
| aarch64_mem_op_p (uint32_t insn, unsigned int *rt, unsigned int *rtn, |
| bfd_boolean *pair, bfd_boolean *load) |
| { |
| uint32_t opcode; |
| unsigned int r; |
| uint32_t opc = 0; |
| uint32_t v = 0; |
| uint32_t opc_v = 0; |
| |
| /* Bail out quickly if INSN doesn't fall into the the load-store |
| encoding space. */ |
| if (!AARCH64_LDST (insn)) |
| return FALSE; |
| |
| *pair = FALSE; |
| *load = FALSE; |
| if (AARCH64_LDST_EX (insn)) |
| { |
| *rt = AARCH64_RT (insn); |
| *rtn = *rt; |
| if (AARCH64_BIT (insn, 21) == 1) |
| { |
| *pair = TRUE; |
| *rtn = AARCH64_RT2 (insn); |
| } |
| *load = AARCH64_LD (insn); |
| return TRUE; |
| } |
| else if (AARCH64_LDST_NAP (insn) |
| || AARCH64_LDSTP_PI (insn) |
| || AARCH64_LDSTP_O (insn) |
| || AARCH64_LDSTP_PRE (insn)) |
| { |
| *pair = TRUE; |
| *rt = AARCH64_RT (insn); |
| *rtn = AARCH64_RT2 (insn); |
| *load = AARCH64_LD (insn); |
| return TRUE; |
| } |
| else if (AARCH64_LDST_PCREL (insn) |
| || AARCH64_LDST_UI (insn) |
| || AARCH64_LDST_PIIMM (insn) |
| || AARCH64_LDST_U (insn) |
| || AARCH64_LDST_PREIMM (insn) |
| || AARCH64_LDST_RO (insn) |
| || AARCH64_LDST_UIMM (insn)) |
| { |
| *rt = AARCH64_RT (insn); |
| *rtn = *rt; |
| if (AARCH64_LDST_PCREL (insn)) |
| *load = TRUE; |
| opc = AARCH64_BITS (insn, 22, 2); |
| v = AARCH64_BIT (insn, 26); |
| opc_v = opc | (v << 2); |
| *load = (opc_v == 1 || opc_v == 2 || opc_v == 3 |
| || opc_v == 5 || opc_v == 7); |
| return TRUE; |
| } |
| else if (AARCH64_LDST_SIMD_M (insn) |
| || AARCH64_LDST_SIMD_M_PI (insn)) |
| { |
| *rt = AARCH64_RT (insn); |
| *load = AARCH64_BIT (insn, 22); |
| opcode = (insn >> 12) & 0xf; |
| switch (opcode) |
| { |
| case 0: |
| case 2: |
| *rtn = *rt + 3; |
| break; |
| |
| case 4: |
| case 6: |
| *rtn = *rt + 2; |
| break; |
| |
| case 7: |
| *rtn = *rt; |
| break; |
| |
| case 8: |
| case 10: |
| *rtn = *rt + 1; |
| break; |
| |
| default: |
| return FALSE; |
| } |
| return TRUE; |
| } |
| else if (AARCH64_LDST_SIMD_S (insn) |
| || AARCH64_LDST_SIMD_S_PI (insn)) |
| { |
| *rt = AARCH64_RT (insn); |
| r = (insn >> 21) & 1; |
| *load = AARCH64_BIT (insn, 22); |
| opcode = (insn >> 13) & 0x7; |
| switch (opcode) |
| { |
| case 0: |
| case 2: |
| case 4: |
| *rtn = *rt + r; |
| break; |
| |
| case 1: |
| case 3: |
| case 5: |
| *rtn = *rt + (r == 0 ? 2 : 3); |
| break; |
| |
| case 6: |
| *rtn = *rt + r; |
| break; |
| |
| case 7: |
| *rtn = *rt + (r == 0 ? 2 : 3); |
| break; |
| |
| default: |
| return FALSE; |
| } |
| return TRUE; |
| } |
| |
| return FALSE; |
| } |
| |
| /* Return TRUE if INSN is multiply-accumulate. */ |
| |
| static bfd_boolean |
| aarch64_mlxl_p (uint32_t insn) |
| { |
| uint32_t op31 = AARCH64_OP31 (insn); |
| |
| if (AARCH64_MAC (insn) |
| && (op31 == 0 || op31 == 1 || op31 == 5) |
| /* Exclude MUL instructions which are encoded as a multiple accumulate |
| with RA = XZR. */ |
| && AARCH64_RA (insn) != AARCH64_ZR) |
| return TRUE; |
| |
| return FALSE; |
| } |
| |
| /* Some early revisions of the Cortex-A53 have an erratum (835769) whereby |
| it is possible for a 64-bit multiply-accumulate instruction to generate an |
| incorrect result. The details are quite complex and hard to |
| determine statically, since branches in the code may exist in some |
| circumstances, but all cases end with a memory (load, store, or |
| prefetch) instruction followed immediately by the multiply-accumulate |
| operation. We employ a linker patching technique, by moving the potentially |
| affected multiply-accumulate instruction into a patch region and replacing |
| the original instruction with a branch to the patch. This function checks |
| if INSN_1 is the memory operation followed by a multiply-accumulate |
| operation (INSN_2). Return TRUE if an erratum sequence is found, FALSE |
| if INSN_1 and INSN_2 are safe. */ |
| |
| static bfd_boolean |
| aarch64_erratum_sequence (uint32_t insn_1, uint32_t insn_2) |
| { |
| uint32_t rt; |
| uint32_t rtn; |
| uint32_t rn; |
| uint32_t rm; |
| uint32_t ra; |
| bfd_boolean pair; |
| bfd_boolean load; |
| |
| if (aarch64_mlxl_p (insn_2) |
| && aarch64_mem_op_p (insn_1, &rt, &rtn, &pair, &load)) |
| { |
| /* Any SIMD memory op is independent of the subsequent MLA |
| by definition of the erratum. */ |
| if (AARCH64_BIT (insn_1, 26)) |
| return TRUE; |
| |
| /* If not SIMD, check for integer memory ops and MLA relationship. */ |
| rn = AARCH64_RN (insn_2); |
| ra = AARCH64_RA (insn_2); |
| rm = AARCH64_RM (insn_2); |
| |
| /* If this is a load and there's a true(RAW) dependency, we are safe |
| and this is not an erratum sequence. */ |
| if (load && |
| (rt == rn || rt == rm || rt == ra |
| || (pair && (rtn == rn || rtn == rm || rtn == ra)))) |
| return FALSE; |
| |
| /* We conservatively put out stubs for all other cases (including |
| writebacks). */ |
| return TRUE; |
| } |
| |
| return FALSE; |
| } |
| |
| /* Used to order a list of mapping symbols by address. */ |
| |
| static int |
| elf_aarch64_compare_mapping (const void *a, const void *b) |
| { |
| const elf_aarch64_section_map *amap = (const elf_aarch64_section_map *) a; |
| const elf_aarch64_section_map *bmap = (const elf_aarch64_section_map *) b; |
| |
| if (amap->vma > bmap->vma) |
| return 1; |
| else if (amap->vma < bmap->vma) |
| return -1; |
| else if (amap->type > bmap->type) |
| /* Ensure results do not depend on the host qsort for objects with |
| multiple mapping symbols at the same address by sorting on type |
| after vma. */ |
| return 1; |
| else if (amap->type < bmap->type) |
| return -1; |
| else |
| return 0; |
| } |
| |
| |
| static char * |
| _bfd_aarch64_erratum_835769_stub_name (unsigned num_fixes) |
| { |
| char *stub_name = (char *) bfd_malloc |
| (strlen ("__erratum_835769_veneer_") + 16); |
| sprintf (stub_name,"__erratum_835769_veneer_%d", num_fixes); |
| return stub_name; |
| } |
| |
| /* Scan for Cortex-A53 erratum 835769 sequence. |
| |
| Return TRUE else FALSE on abnormal termination. */ |
| |
| static bfd_boolean |
| _bfd_aarch64_erratum_835769_scan (bfd *input_bfd, |
| struct bfd_link_info *info, |
| unsigned int *num_fixes_p) |
| { |
| asection *section; |
| struct elf_aarch64_link_hash_table *htab = elf_aarch64_hash_table (info); |
| unsigned int num_fixes = *num_fixes_p; |
| |
| if (htab == NULL) |
| return TRUE; |
| |
| for (section = input_bfd->sections; |
| section != NULL; |
| section = section->next) |
| { |
| bfd_byte *contents = NULL; |
| struct _aarch64_elf_section_data *sec_data; |
| unsigned int span; |
| |
| if (elf_section_type (section) != SHT_PROGBITS |
| || (elf_section_flags (section) & SHF_EXECINSTR) == 0 |
| || (section->flags & SEC_EXCLUDE) != 0 |
| || (section->sec_info_type == SEC_INFO_TYPE_JUST_SYMS) |
| || (section->output_section == bfd_abs_section_ptr)) |
| continue; |
| |
| if (elf_section_data (section)->this_hdr.contents != NULL) |
| contents = elf_section_data (section)->this_hdr.contents; |
| else if (! bfd_malloc_and_get_section (input_bfd, section, &contents)) |
| return FALSE; |
| |
| sec_data = elf_aarch64_section_data (section); |
| |
| qsort (sec_data->map, sec_data->mapcount, |
| sizeof (elf_aarch64_section_map), elf_aarch64_compare_mapping); |
| |
| for (span = 0; span < sec_data->mapcount; span++) |
| { |
| unsigned int span_start = sec_data->map[span].vma; |
| unsigned int span_end = ((span == sec_data->mapcount - 1) |
| ? sec_data->map[0].vma + section->size |
| : sec_data->map[span + 1].vma); |
| unsigned int i; |
| char span_type = sec_data->map[span].type; |
| |
| if (span_type == 'd') |
| continue; |
| |
| for (i = span_start; i + 4 < span_end; i += 4) |
| { |
| uint32_t insn_1 = bfd_getl32 (contents + i); |
| uint32_t insn_2 = bfd_getl32 (contents + i + 4); |
| |
| if (aarch64_erratum_sequence (insn_1, insn_2)) |
| { |
| struct elf_aarch64_stub_hash_entry *stub_entry; |
| char *stub_name = _bfd_aarch64_erratum_835769_stub_name (num_fixes); |
| if (! stub_name) |
| return FALSE; |
| |
| stub_entry = _bfd_aarch64_add_stub_entry_in_group (stub_name, |
| section, |
| htab); |
| if (! stub_entry) |
| return FALSE; |
| |
| stub_entry->stub_type = aarch64_stub_erratum_835769_veneer; |
| stub_entry->target_section = section; |
| stub_entry->target_value = i + 4; |
| stub_entry->veneered_insn = insn_2; |
| stub_entry->output_name = stub_name; |
| num_fixes++; |
| } |
| } |
| } |
| if (elf_section_data (section)->this_hdr.contents == NULL) |
| free (contents); |
| } |
| |
| *num_fixes_p = num_fixes; |
| |
| return TRUE; |
| } |
| |
| |
| /* Test if instruction INSN is ADRP. */ |
| |
| static bfd_boolean |
| _bfd_aarch64_adrp_p (uint32_t insn) |
| { |
| return ((insn & 0x9f000000) == 0x90000000); |
| } |
| |
| |
| /* Helper predicate to look for cortex-a53 erratum 843419 sequence 1. */ |
| |
| static bfd_boolean |
| _bfd_aarch64_erratum_843419_sequence_p (uint32_t insn_1, uint32_t insn_2, |
| uint32_t insn_3) |
| { |
| uint32_t rt; |
| uint32_t rt2; |
| bfd_boolean pair; |
| bfd_boolean load; |
| |
| return (aarch64_mem_op_p (insn_2, &rt, &rt2, &pair, &load) |
| && (!pair |
| || (pair && !load)) |
| && AARCH64_LDST_UIMM (insn_3) |
| && AARCH64_RN (insn_3) == AARCH64_RD (insn_1)); |
| } |
| |
| |
| /* Test for the presence of Cortex-A53 erratum 843419 instruction sequence. |
| |
| Return TRUE if section CONTENTS at offset I contains one of the |
| erratum 843419 sequences, otherwise return FALSE. If a sequence is |
| seen set P_VENEER_I to the offset of the final LOAD/STORE |
| instruction in the sequence. |
| */ |
| |
| static bfd_boolean |
| _bfd_aarch64_erratum_843419_p (bfd_byte *contents, bfd_vma vma, |
| bfd_vma i, bfd_vma span_end, |
| bfd_vma *p_veneer_i) |
| { |
| uint32_t insn_1 = bfd_getl32 (contents + i); |
| |
| if (!_bfd_aarch64_adrp_p (insn_1)) |
| return FALSE; |
| |
| if (span_end < i + 12) |
| return FALSE; |
| |
| uint32_t insn_2 = bfd_getl32 (contents + i + 4); |
| uint32_t insn_3 = bfd_getl32 (contents + i + 8); |
| |
| if ((vma & 0xfff) != 0xff8 && (vma & 0xfff) != 0xffc) |
| return FALSE; |
| |
| if (_bfd_aarch64_erratum_843419_sequence_p (insn_1, insn_2, insn_3)) |
| { |
| *p_veneer_i = i + 8; |
| return TRUE; |
| } |
| |
| if (span_end < i + 16) |
| return FALSE; |
| |
| uint32_t insn_4 = bfd_getl32 (contents + i + 12); |
| |
| if (_bfd_aarch64_erratum_843419_sequence_p (insn_1, insn_2, insn_4)) |
| { |
| *p_veneer_i = i + 12; |
| return TRUE; |
| } |
| |
| return FALSE; |
| } |
| |
| |
| /* Resize all stub sections. */ |
| |
| static void |
| _bfd_aarch64_resize_stubs (struct elf_aarch64_link_hash_table *htab) |
| { |
| asection *section; |
| |
| /* OK, we've added some stubs. Find out the new size of the |
| stub sections. */ |
| for (section = htab->stub_bfd->sections; |
| section != NULL; section = section->next) |
| { |
| /* Ignore non-stub sections. */ |
| if (!strstr (section->name, STUB_SUFFIX)) |
| continue; |
| section->size = 0; |
| } |
| |
| bfd_hash_traverse (&htab->stub_hash_table, aarch64_size_one_stub, htab); |
| |
| for (section = htab->stub_bfd->sections; |
| section != NULL; section = section->next) |
| { |
| if (!strstr (section->name, STUB_SUFFIX)) |
| continue; |
| |
| if (section->size) |
| section->size += 4; |
| |
| /* Ensure all stub sections have a size which is a multiple of |
| 4096. This is important in order to ensure that the insertion |
| of stub sections does not in itself move existing code around |
| in such a way that new errata sequences are created. */ |
| if (htab->fix_erratum_843419) |
| if (section->size) |
| section->size = BFD_ALIGN (section->size, 0x1000); |
| } |
| } |
| |
| |
| /* Construct an erratum 843419 workaround stub name. |
| */ |
| |
| static char * |
| _bfd_aarch64_erratum_843419_stub_name (asection *input_section, |
| bfd_vma offset) |
| { |
| const bfd_size_type len = 8 + 4 + 1 + 8 + 1 + 16 + 1; |
| char *stub_name = bfd_malloc (len); |
| |
| if (stub_name != NULL) |
| snprintf (stub_name, len, "e843419@%04x_%08x_%" BFD_VMA_FMT "x", |
| input_section->owner->id, |
| input_section->id, |
| offset); |
| return stub_name; |
| } |
| |
| /* Build a stub_entry structure describing an 843419 fixup. |
| |
| The stub_entry constructed is populated with the bit pattern INSN |
| of the instruction located at OFFSET within input SECTION. |
| |
| Returns TRUE on success. */ |
| |
| static bfd_boolean |
| _bfd_aarch64_erratum_843419_fixup (uint32_t insn, |
| bfd_vma adrp_offset, |
| bfd_vma ldst_offset, |
| asection *section, |
| struct bfd_link_info *info) |
| { |
| struct elf_aarch64_link_hash_table *htab = elf_aarch64_hash_table (info); |
| char *stub_name; |
| struct elf_aarch64_stub_hash_entry *stub_entry; |
| |
| stub_name = _bfd_aarch64_erratum_843419_stub_name (section, ldst_offset); |
| stub_entry = aarch64_stub_hash_lookup (&htab->stub_hash_table, stub_name, |
| FALSE, FALSE); |
| if (stub_entry) |
| { |
| free (stub_name); |
| return TRUE; |
| } |
| |
| /* We always place an 843419 workaround veneer in the stub section |
| attached to the input section in which an erratum sequence has |
| been found. This ensures that later in the link process (in |
| elfNN_aarch64_write_section) when we copy the veneered |
| instruction from the input section into the stub section the |
| copied instruction will have had any relocations applied to it. |
| If we placed workaround veneers in any other stub section then we |
| could not assume that all relocations have been processed on the |
| corresponding input section at the point we output the stub |
| section. |
| */ |
| |
| stub_entry = _bfd_aarch64_add_stub_entry_after (stub_name, section, htab); |
| if (stub_entry == NULL) |
| { |
| free (stub_name); |
| return FALSE; |
| } |
| |
| stub_entry->adrp_offset = adrp_offset; |
| stub_entry->target_value = ldst_offset; |
| stub_entry->target_section = section; |
| stub_entry->stub_type = aarch64_stub_erratum_843419_veneer; |
| stub_entry->veneered_insn = insn; |
| stub_entry->output_name = stub_name; |
| |
| return TRUE; |
| } |
| |
| |
| /* Scan an input section looking for the signature of erratum 843419. |
| |
| Scans input SECTION in INPUT_BFD looking for erratum 843419 |
| signatures, for each signature found a stub_entry is created |
| describing the location of the erratum for subsequent fixup. |
| |
| Return TRUE on successful scan, FALSE on failure to scan. |
| */ |
| |
| static bfd_boolean |
| _bfd_aarch64_erratum_843419_scan (bfd *input_bfd, asection *section, |
| struct bfd_link_info *info) |
| { |
| struct elf_aarch64_link_hash_table *htab = elf_aarch64_hash_table (info); |
| |
| if (htab == NULL) |
| return TRUE; |
| |
| if (elf_section_type (section) != SHT_PROGBITS |
| || (elf_section_flags (section) & SHF_EXECINSTR) == 0 |
| || (section->flags & SEC_EXCLUDE) != 0 |
| || (section->sec_info_type == SEC_INFO_TYPE_JUST_SYMS) |
| || (section->output_section == bfd_abs_section_ptr)) |
| return TRUE; |
| |
| do |
| { |
| bfd_byte *contents = NULL; |
| struct _aarch64_elf_section_data *sec_data; |
| unsigned int span; |
| |
| if (elf_section_data (section)->this_hdr.contents != NULL) |
| contents = elf_section_data (section)->this_hdr.contents; |
| else if (! bfd_malloc_and_get_section (input_bfd, section, &contents)) |
| return FALSE; |
| |
| sec_data = elf_aarch64_section_data (section); |
| |
| qsort (sec_data->map, sec_data->mapcount, |
| sizeof (elf_aarch64_section_map), elf_aarch64_compare_mapping); |
| |
| for (span = 0; span < sec_data->mapcount; span++) |
| { |
| unsigned int span_start = sec_data->map[span].vma; |
| unsigned int span_end = ((span == sec_data->mapcount - 1) |
| ? sec_data->map[0].vma + section->size |
| : sec_data->map[span + 1].vma); |
| unsigned int i; |
| char span_type = sec_data->map[span].type; |
| |
| if (span_type == 'd') |
| continue; |
| |
| for (i = span_start; i + 8 < span_end; i += 4) |
| { |
| bfd_vma vma = (section->output_section->vma |
| + section->output_offset |
| + i); |
| bfd_vma veneer_i; |
| |
| if (_bfd_aarch64_erratum_843419_p |
| (contents, vma, i, span_end, &veneer_i)) |
| { |
| uint32_t insn = bfd_getl32 (contents + veneer_i); |
| |
| if (!_bfd_aarch64_erratum_843419_fixup (insn, i, veneer_i, |
| section, info)) |
| return FALSE; |
| } |
| } |
| } |
| |
| if (elf_section_data (section)->this_hdr.contents == NULL) |
| free (contents); |
| } |
| while (0); |
| |
| return TRUE; |
| } |
| |
| |
| /* Determine and set the size of the stub section for a final link. |
| |
| The basic idea here is to examine all the relocations looking for |
| PC-relative calls to a target that is unreachable with a "bl" |
| instruction. */ |
| |
| bfd_boolean |
| elfNN_aarch64_size_stubs (bfd *output_bfd, |
| bfd *stub_bfd, |
| struct bfd_link_info *info, |
| bfd_signed_vma group_size, |
| asection * (*add_stub_section) (const char *, |
| asection *), |
| void (*layout_sections_again) (void)) |
| { |
| bfd_size_type stub_group_size; |
| bfd_boolean stubs_always_before_branch; |
| bfd_boolean stub_changed = FALSE; |
| struct elf_aarch64_link_hash_table *htab = elf_aarch64_hash_table (info); |
| unsigned int num_erratum_835769_fixes = 0; |
| |
| /* Propagate mach to stub bfd, because it may not have been |
| finalized when we created stub_bfd. */ |
| bfd_set_arch_mach (stub_bfd, bfd_get_arch (output_bfd), |
| bfd_get_mach (output_bfd)); |
| |
| /* Stash our params away. */ |
| htab->stub_bfd = stub_bfd; |
| htab->add_stub_section = add_stub_section; |
| htab->layout_sections_again = layout_sections_again; |
| stubs_always_before_branch = group_size < 0; |
| if (group_size < 0) |
| stub_group_size = -group_size; |
| else |
| stub_group_size = group_size; |
| |
| if (stub_group_size == 1) |
| { |
| /* Default values. */ |
| /* AArch64 branch range is +-128MB. The value used is 1MB less. */ |
| stub_group_size = 127 * 1024 * 1024; |
| } |
| |
| group_sections (htab, stub_group_size, stubs_always_before_branch); |
| |
| (*htab->layout_sections_again) (); |
| |
| if (htab->fix_erratum_835769) |
| { |
| bfd *input_bfd; |
| |
| for (input_bfd = info->input_bfds; |
| input_bfd != NULL; input_bfd = input_bfd->link.next) |
| if (!_bfd_aarch64_erratum_835769_scan (input_bfd, info, |
| &num_erratum_835769_fixes)) |
| return FALSE; |
| |
| _bfd_aarch64_resize_stubs (htab); |
| (*htab->layout_sections_again) (); |
| } |
| |
| if (htab->fix_erratum_843419) |
| { |
| bfd *input_bfd; |
| |
| for (input_bfd = info->input_bfds; |
| input_bfd != NULL; |
| input_bfd = input_bfd->link.next) |
| { |
| asection *section; |
| |
| for (section = input_bfd->sections; |
| section != NULL; |
| section = section->next) |
| if (!_bfd_aarch64_erratum_843419_scan (input_bfd, section, info)) |
| return FALSE; |
| } |
| |
| _bfd_aarch64_resize_stubs (htab); |
| (*htab->layout_sections_again) (); |
| } |
| |
| while (1) |
| { |
| bfd *input_bfd; |
| |
| for (input_bfd = info->input_bfds; |
| input_bfd != NULL; input_bfd = input_bfd->link.next) |
| { |
| Elf_Internal_Shdr *symtab_hdr; |
| asection *section; |
| Elf_Internal_Sym *local_syms = NULL; |
| |
| /* We'll need the symbol table in a second. */ |
| symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
| if (symtab_hdr->sh_info == 0) |
| continue; |
| |
| /* Walk over each section attached to the input bfd. */ |
| for (section = input_bfd->sections; |
| section != NULL; section = section->next) |
| { |
| Elf_Internal_Rela *internal_relocs, *irelaend, *irela; |
| |
| /* If there aren't any relocs, then there's nothing more |
| to do. */ |
| if ((section->flags & SEC_RELOC) == 0 |
| || section->reloc_count == 0 |
| || (section->flags & SEC_CODE) == 0) |
| continue; |
| |
| /* If this section is a link-once section that will be |
| discarded, then don't create any stubs. */ |
| if (section->output_section == NULL |
| || section->output_section->owner != output_bfd) |
| continue; |
| |
| /* Get the relocs. */ |
| internal_relocs |
| = _bfd_elf_link_read_relocs (input_bfd, section, NULL, |
| NULL, info->keep_memory); |
| if (internal_relocs == NULL) |
| goto error_ret_free_local; |
| |
| /* Now examine each relocation. */ |
| irela = internal_relocs; |
| irelaend = irela + section->reloc_count; |
| for (; irela < irelaend; irela++) |
| { |
| unsigned int r_type, r_indx; |
| enum elf_aarch64_stub_type stub_type; |
| struct elf_aarch64_stub_hash_entry *stub_entry; |
| asection *sym_sec; |
| bfd_vma sym_value; |
| bfd_vma destination; |
| struct elf_aarch64_link_hash_entry *hash; |
| const char *sym_name; |
| char *stub_name; |
| const asection *id_sec; |
| unsigned char st_type; |
| bfd_size_type len; |
| |
| r_type = ELFNN_R_TYPE (irela->r_info); |
| r_indx = ELFNN_R_SYM (irela->r_info); |
| |
| if (r_type >= (unsigned int) R_AARCH64_end) |
| { |
| bfd_set_error (bfd_error_bad_value); |
| error_ret_free_internal: |
| if (elf_section_data (section)->relocs == NULL) |
| free (internal_relocs); |
| goto error_ret_free_local; |
| } |
| |
| /* Only look for stubs on unconditional branch and |
| branch and link instructions. */ |
| if (r_type != (unsigned int) AARCH64_R (CALL26) |
| && r_type != (unsigned int) AARCH64_R (JUMP26)) |
| continue; |
| |
| /* Now determine the call target, its name, value, |
| section. */ |
| sym_sec = NULL; |
| sym_value = 0; |
| destination = 0; |
| hash = NULL; |
| sym_name = NULL; |
| if (r_indx < symtab_hdr->sh_info) |
| { |
| /* It's a local symbol. */ |
| Elf_Internal_Sym *sym; |
| Elf_Internal_Shdr *hdr; |
| |
| if (local_syms == NULL) |
| { |
| local_syms |
| = (Elf_Internal_Sym *) symtab_hdr->contents; |
| if (local_syms == NULL) |
| local_syms |
| = bfd_elf_get_elf_syms (input_bfd, symtab_hdr, |
| symtab_hdr->sh_info, 0, |
| NULL, NULL, NULL); |
| if (local_syms == NULL) |
| goto error_ret_free_internal; |
| } |
| |
| sym = local_syms + r_indx; |
| hdr = elf_elfsections (input_bfd)[sym->st_shndx]; |
| sym_sec = hdr->bfd_section; |
| if (!sym_sec) |
| /* This is an undefined symbol. It can never |
| be resolved. */ |
| continue; |
| |
| if (ELF_ST_TYPE (sym->st_info) != STT_SECTION) |
| sym_value = sym->st_value; |
| destination = (sym_value + irela->r_addend |
| + sym_sec->output_offset |
| + sym_sec->output_section->vma); |
| st_type = ELF_ST_TYPE (sym->st_info); |
| sym_name |
| = bfd_elf_string_from_elf_section (input_bfd, |
| symtab_hdr->sh_link, |
| sym->st_name); |
| } |
| else |
| { |
| int e_indx; |
| |
| e_indx = r_indx - symtab_hdr->sh_info; |
| hash = ((struct elf_aarch64_link_hash_entry *) |
| elf_sym_hashes (input_bfd)[e_indx]); |
| |
| while (hash->root.root.type == bfd_link_hash_indirect |
| || hash->root.root.type == bfd_link_hash_warning) |
| hash = ((struct elf_aarch64_link_hash_entry *) |
| hash->root.root.u.i.link); |
| |
| if (hash->root.root.type == bfd_link_hash_defined |
| || hash->root.root.type == bfd_link_hash_defweak) |
| { |
| struct elf_aarch64_link_hash_table *globals = |
| elf_aarch64_hash_table (info); |
| sym_sec = hash->root.root.u.def.section; |
| sym_value = hash->root.root.u.def.value; |
| /* For a destination in a shared library, |
| use the PLT stub as target address to |
| decide whether a branch stub is |
| needed. */ |
| if (globals->root.splt != NULL && hash != NULL |
| && hash->root.plt.offset != (bfd_vma) - 1) |
| { |
| sym_sec = globals->root.splt; |
| sym_value = hash->root.plt.offset; |
| if (sym_sec->output_section != NULL) |
| destination = (sym_value |
| + sym_sec->output_offset |
| + |
| sym_sec->output_section->vma); |
| } |
| else if (sym_sec->output_section != NULL) |
| destination = (sym_value + irela->r_addend |
| + sym_sec->output_offset |
| + sym_sec->output_section->vma); |
| } |
| else if (hash->root.root.type == bfd_link_hash_undefined |
| || (hash->root.root.type |
| == bfd_link_hash_undefweak)) |
| { |
| /* For a shared library, use the PLT stub as |
| target address to decide whether a long |
| branch stub is needed. |
| For absolute code, they cannot be handled. */ |
| struct elf_aarch64_link_hash_table *globals = |
| elf_aarch64_hash_table (info); |
| |
| if (globals->root.splt != NULL && hash != NULL |
| && hash->root.plt.offset != (bfd_vma) - 1) |
| { |
| sym_sec = globals->root.splt; |
| sym_value = hash->root.plt.offset; |
| if (sym_sec->output_section != NULL) |
| destination = (sym_value |
| + sym_sec->output_offset |
| + |
| sym_sec->output_section->vma); |
| } |
| else |
| continue; |
| } |
| else |
| { |
| bfd_set_error (bfd_error_bad_value); |
| goto error_ret_free_internal; |
| } |
| st_type = ELF_ST_TYPE (hash->root.type); |
| sym_name = hash->root.root.root.string; |
| } |
| |
| /* Determine what (if any) linker stub is needed. */ |
| stub_type = aarch64_type_of_stub |
| (info, section, irela, st_type, hash, destination); |
| if (stub_type == aarch64_stub_none) |
| continue; |
| |
| /* Support for grouping stub sections. */ |
| id_sec = htab->stub_group[section->id].link_sec; |
| |
| /* Get the name of this stub. */ |
| stub_name = elfNN_aarch64_stub_name (id_sec, sym_sec, hash, |
| irela); |
| if (!stub_name) |
| goto error_ret_free_internal; |
| |
| stub_entry = |
| aarch64_stub_hash_lookup (&htab->stub_hash_table, |
| stub_name, FALSE, FALSE); |
| if (stub_entry != NULL) |
| { |
| /* The proper stub has already been created. */ |
| free (stub_name); |
| continue; |
| } |
| |
| stub_entry = _bfd_aarch64_add_stub_entry_in_group |
| (stub_name, section, htab); |
| if (stub_entry == NULL) |
| { |
| free (stub_name); |
| goto error_ret_free_internal; |
| } |
| |
| stub_entry->target_value = sym_value; |
| stub_entry->target_section = sym_sec; |
| stub_entry->stub_type = stub_type; |
| stub_entry->h = hash; |
| stub_entry->st_type = st_type; |
| |
| if (sym_name == NULL) |
| sym_name = "unnamed"; |
| len = sizeof (STUB_ENTRY_NAME) + strlen (sym_name); |
| stub_entry->output_name = bfd_alloc (htab->stub_bfd, len); |
| if (stub_entry->output_name == NULL) |
| { |
| free (stub_name); |
| goto error_ret_free_internal; |
| } |
| |
| snprintf (stub_entry->output_name, len, STUB_ENTRY_NAME, |
| sym_name); |
| |
| stub_changed = TRUE; |
| } |
| |
| /* We're done with the internal relocs, free them. */ |
| if (elf_section_data (section)->relocs == NULL) |
| free (internal_relocs); |
| } |
| } |
| |
| if (!stub_changed) |
| break; |
| |
| _bfd_aarch64_resize_stubs (htab); |
| |
| /* Ask the linker to do its stuff. */ |
| (*htab->layout_sections_again) (); |
| stub_changed = FALSE; |
| } |
| |
| return TRUE; |
| |
| error_ret_free_local: |
| return FALSE; |
| } |
| |
| /* Build all the stubs associated with the current output file. The |
| stubs are kept in a hash table attached to the main linker hash |
| table. We also set up the .plt entries for statically linked PIC |
| functions here. This function is called via aarch64_elf_finish in the |
| linker. */ |
| |
| bfd_boolean |
| elfNN_aarch64_build_stubs (struct bfd_link_info *info) |
| { |
| asection *stub_sec; |
| struct bfd_hash_table *table; |
| struct elf_aarch64_link_hash_table *htab; |
| |
| htab = elf_aarch64_hash_table (info); |
| |
| for (stub_sec = htab->stub_bfd->sections; |
| stub_sec != NULL; stub_sec = stub_sec->next) |
| { |
| bfd_size_type size; |
| |
| /* Ignore non-stub sections. */ |
| if (!strstr (stub_sec->name, STUB_SUFFIX)) |
| continue; |
| |
| /* Allocate memory to hold the linker stubs. */ |
| size = stub_sec->size; |
| stub_sec->contents = bfd_zalloc (htab->stub_bfd, size); |
| if (stub_sec->contents == NULL && size != 0) |
| return FALSE; |
| stub_sec->size = 0; |
| |
| bfd_putl32 (0x14000000 | (size >> 2), stub_sec->contents); |
| stub_sec->size += 4; |
| } |
| |
| /* Build the stubs as directed by the stub hash table. */ |
| table = &htab->stub_hash_table; |
| bfd_hash_traverse (table, aarch64_build_one_stub, info); |
| |
| return TRUE; |
| } |
| |
| |
| /* Add an entry to the code/data map for section SEC. */ |
| |
| static void |
| elfNN_aarch64_section_map_add (asection *sec, char type, bfd_vma vma) |
| { |
| struct _aarch64_elf_section_data *sec_data = |
| elf_aarch64_section_data (sec); |
| unsigned int newidx; |
| |
| if (sec_data->map == NULL) |
| { |
| sec_data->map = bfd_malloc (sizeof (elf_aarch64_section_map)); |
| sec_data->mapcount = 0; |
| sec_data->mapsize = 1; |
| } |
| |
| newidx = sec_data->mapcount++; |
| |
| if (sec_data->mapcount > sec_data->mapsize) |
| { |
| sec_data->mapsize *= 2; |
| sec_data->map = bfd_realloc_or_free |
| (sec_data->map, sec_data->mapsize * sizeof (elf_aarch64_section_map)); |
| } |
| |
| if (sec_data->map) |
| { |
| sec_data->map[newidx].vma = vma; |
| sec_data->map[newidx].type = type; |
| } |
| } |
| |
| |
| /* Initialise maps of insn/data for input BFDs. */ |
| void |
| bfd_elfNN_aarch64_init_maps (bfd *abfd) |
| { |
| Elf_Internal_Sym *isymbuf; |
| Elf_Internal_Shdr *hdr; |
| unsigned int i, localsyms; |
| |
| /* Make sure that we are dealing with an AArch64 elf binary. */ |
| if (!is_aarch64_elf (abfd)) |
| return; |
| |
| if ((abfd->flags & DYNAMIC) != 0) |
| return; |
| |
| hdr = &elf_symtab_hdr (abfd); |
| localsyms = hdr->sh_info; |
| |
| /* Obtain a buffer full of symbols for this BFD. The hdr->sh_info field |
| should contain the number of local symbols, which should come before any |
| global symbols. Mapping symbols are always local. */ |
| isymbuf = bfd_elf_get_elf_syms (abfd, hdr, localsyms, 0, NULL, NULL, NULL); |
| |
| /* No internal symbols read? Skip this BFD. */ |
| if (isymbuf == NULL) |
| return; |
| |
| for (i = 0; i < localsyms; i++) |
| { |
| Elf_Internal_Sym *isym = &isymbuf[i]; |
| asection *sec = bfd_section_from_elf_index (abfd, isym->st_shndx); |
| const char *name; |
| |
| if (sec != NULL && ELF_ST_BIND (isym->st_info) == STB_LOCAL) |
| { |
| name = bfd_elf_string_from_elf_section (abfd, |
| hdr->sh_link, |
| isym->st_name); |
| |
| if (bfd_is_aarch64_special_symbol_name |
| (name, BFD_AARCH64_SPECIAL_SYM_TYPE_MAP)) |
| elfNN_aarch64_section_map_add (sec, name[1], isym->st_value); |
| } |
| } |
| } |
| |
| /* Set option values needed during linking. */ |
| void |
| bfd_elfNN_aarch64_set_options (struct bfd *output_bfd, |
| struct bfd_link_info *link_info, |
| int no_enum_warn, |
| int no_wchar_warn, int pic_veneer, |
| int fix_erratum_835769, |
| int fix_erratum_843419) |
| { |
| struct elf_aarch64_link_hash_table *globals; |
| |
| globals = elf_aarch64_hash_table (link_info); |
| globals->pic_veneer = pic_veneer; |
| globals->fix_erratum_835769 = fix_erratum_835769; |
| globals->fix_erratum_843419 = fix_erratum_843419; |
| globals->fix_erratum_843419_adr = TRUE; |
| |
| BFD_ASSERT (is_aarch64_elf (output_bfd)); |
| elf_aarch64_tdata (output_bfd)->no_enum_size_warning = no_enum_warn; |
| elf_aarch64_tdata (output_bfd)->no_wchar_size_warning = no_wchar_warn; |
| } |
| |
| static bfd_vma |
| aarch64_calculate_got_entry_vma (struct elf_link_hash_entry *h, |
| struct elf_aarch64_link_hash_table |
| *globals, struct bfd_link_info *info, |
| bfd_vma value, bfd *output_bfd, |
| bfd_boolean *unresolved_reloc_p) |
| { |
| bfd_vma off = (bfd_vma) - 1; |
| asection *basegot = globals->root.sgot; |
| bfd_boolean dyn = globals->root.dynamic_sections_created; |
| |
| if (h != NULL) |
| { |
| BFD_ASSERT (basegot != NULL); |
| off = h->got.offset; |
| BFD_ASSERT (off != (bfd_vma) - 1); |
| if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h) |
| || (info->shared |
| && SYMBOL_REFERENCES_LOCAL (info, h)) |
| || (ELF_ST_VISIBILITY (h->other) |
| && h->root.type == bfd_link_hash_undefweak)) |
| { |
| /* This is actually a static link, or it is a -Bsymbolic link |
| and the symbol is defined locally. We must initialize this |
| entry in the global offset table. Since the offset must |
| always be a multiple of 8 (4 in the case of ILP32), we use |
| the least significant bit to record whether we have |
| initialized it already. |
| When doing a dynamic link, we create a .rel(a).got relocation |
| entry to initialize the value. This is done in the |
| finish_dynamic_symbol routine. */ |
| if ((off & 1) != 0) |
| off &= ~1; |
| else |
| { |
| bfd_put_NN (output_bfd, value, basegot->contents + off); |
| h->got.offset |= 1; |
| } |
| } |
| else |
| *unresolved_reloc_p = FALSE; |
| |
| off = off + basegot->output_section->vma + basegot->output_offset; |
| } |
| |
| return off; |
| } |
| |
| /* Change R_TYPE to a more efficient access model where possible, |
| return the new reloc type. */ |
| |
| static bfd_reloc_code_real_type |
| aarch64_tls_transition_without_check (bfd_reloc_code_real_type r_type, |
| struct elf_link_hash_entry *h) |
| { |
| bfd_boolean is_local = h == NULL; |
| |
| switch (r_type) |
| { |
| case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21: |
| case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21: |
| return (is_local |
| ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1 |
| : BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21); |
| |
| case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC: |
| case BFD_RELOC_AARCH64_TLSDESC_LDNN_LO12_NC: |
| return (is_local |
| ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC |
| : BFD_RELOC_AARCH64_TLSIE_LDNN_GOTTPREL_LO12_NC); |
| |
| case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21: |
| return is_local ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1 : r_type; |
| |
| case BFD_RELOC_AARCH64_TLSIE_LDNN_GOTTPREL_LO12_NC: |
| return is_local ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC : r_type; |
| |
| case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC: |
| case BFD_RELOC_AARCH64_TLSDESC_CALL: |
| /* Instructions with these relocations will become NOPs. */ |
| return BFD_RELOC_AARCH64_NONE; |
| |
| default: |
| break; |
| } |
| |
| return r_type; |
| } |
| |
| static unsigned int |
| aarch64_reloc_got_type (bfd_reloc_code_real_type r_type) |
| { |
| switch (r_type) |
| { |
| case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC: |
| case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC: |
| case BFD_RELOC_AARCH64_ADR_GOT_PAGE: |
| case BFD_RELOC_AARCH64_GOT_LD_PREL19: |
| return GOT_NORMAL; |
| |
| case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21: |
| case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC: |
| return GOT_TLS_GD; |
| |
| case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC: |
| case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21: |
| case BFD_RELOC_AARCH64_TLSDESC_CALL: |
| case BFD_RELOC_AARCH64_TLSDESC_LD64_LO12_NC: |
| case BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC: |
| return GOT_TLSDESC_GD; |
| |
| case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21: |
| case BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC: |
| case BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC: |
| return GOT_TLS_IE; |
| |
| case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12: |
| case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12: |
| case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12_NC: |
| case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0: |
| case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC: |
| case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1: |
| case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC: |
| case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2: |
| return GOT_UNKNOWN; |
| |
| default: |
| break; |
| } |
| return GOT_UNKNOWN; |
| } |
| |
| static bfd_boolean |
| aarch64_can_relax_tls (bfd *input_bfd, |
| struct bfd_link_info *info, |
| bfd_reloc_code_real_type r_type, |
| struct elf_link_hash_entry *h, |
| unsigned long r_symndx) |
| { |
| unsigned int symbol_got_type; |
| unsigned int reloc_got_type; |
| |
| if (! IS_AARCH64_TLS_RELOC (r_type)) |
| return FALSE; |
| |
| symbol_got_type = elfNN_aarch64_symbol_got_type (h, input_bfd, r_symndx); |
| reloc_got_type = aarch64_reloc_got_type (r_type); |
| |
| if (symbol_got_type == GOT_TLS_IE && GOT_TLS_GD_ANY_P (reloc_got_type)) |
| return TRUE; |
| |
| if (info->shared) |
| return FALSE; |
| |
| if (h && h->root.type == bfd_link_hash_undefweak) |
| return FALSE; |
| |
| return TRUE; |
| } |
| |
| /* Given the relocation code R_TYPE, return the relaxed bfd reloc |
| enumerator. */ |
| |
| static bfd_reloc_code_real_type |
| aarch64_tls_transition (bfd *input_bfd, |
| struct bfd_link_info *info, |
| unsigned int r_type, |
| struct elf_link_hash_entry *h, |
| unsigned long r_symndx) |
| { |
| bfd_reloc_code_real_type bfd_r_type |
| = elfNN_aarch64_bfd_reloc_from_type (r_type); |
| |
| if (! aarch64_can_relax_tls (input_bfd, info, bfd_r_type, h, r_symndx)) |
| return bfd_r_type; |
| |
| return aarch64_tls_transition_without_check (bfd_r_type, h); |
| } |
| |
| /* Return the base VMA address which should be subtracted from real addresses |
| when resolving R_AARCH64_TLS_DTPREL relocation. */ |
| |
| static bfd_vma |
| dtpoff_base (struct bfd_link_info *info) |
| { |
| /* If tls_sec is NULL, we should have signalled an error already. */ |
| BFD_ASSERT (elf_hash_table (info)->tls_sec != NULL); |
| return elf_hash_table (info)->tls_sec->vma; |
| } |
| |
| /* Return the base VMA address which should be subtracted from real addresses |
| when resolving R_AARCH64_TLS_GOTTPREL64 relocations. */ |
| |
| static bfd_vma |
| tpoff_base (struct bfd_link_info *info) |
| { |
| struct elf_link_hash_table *htab = elf_hash_table (info); |
| |
| /* If tls_sec is NULL, we should have signalled an error already. */ |
| BFD_ASSERT (htab->tls_sec != NULL); |
| |
| bfd_vma base = align_power ((bfd_vma) TCB_SIZE, |
| htab->tls_sec->alignment_power); |
| return htab->tls_sec->vma - base; |
| } |
| |
| static bfd_vma * |
| symbol_got_offset_ref (bfd *input_bfd, struct elf_link_hash_entry *h, |
| unsigned long r_symndx) |
| { |
| /* Calculate the address of the GOT entry for symbol |
| referred to in h. */ |
| if (h != NULL) |
| return &h->got.offset; |
| else |
| { |
| /* local symbol */ |
| struct elf_aarch64_local_symbol *l; |
| |
| l = elf_aarch64_locals (input_bfd); |
| return &l[r_symndx].got_offset; |
| } |
| } |
| |
| static void |
| symbol_got_offset_mark (bfd *input_bfd, struct elf_link_hash_entry *h, |
| unsigned long r_symndx) |
| { |
| bfd_vma *p; |
| p = symbol_got_offset_ref (input_bfd, h, r_symndx); |
| *p |= 1; |
| } |
| |
| static int |
| symbol_got_offset_mark_p (bfd *input_bfd, struct elf_link_hash_entry *h, |
| unsigned long r_symndx) |
| { |
| bfd_vma value; |
| value = * symbol_got_offset_ref (input_bfd, h, r_symndx); |
| return value & 1; |
| } |
| |
| static bfd_vma |
| symbol_got_offset (bfd *input_bfd, struct elf_link_hash_entry *h, |
| unsigned long r_symndx) |
| { |
| bfd_vma value; |
| value = * symbol_got_offset_ref (input_bfd, h, r_symndx); |
| value &= ~1; |
| return value; |
| } |
| |
| static bfd_vma * |
| symbol_tlsdesc_got_offset_ref (bfd *input_bfd, struct elf_link_hash_entry *h, |
| unsigned long r_symndx) |
| { |
| /* Calculate the address of the GOT entry for symbol |
| referred to in h. */ |
| if (h != NULL) |
| { |
| struct elf_aarch64_link_hash_entry *eh; |
| eh = (struct elf_aarch64_link_hash_entry *) h; |
| return &eh->tlsdesc_got_jump_table_offset; |
| } |
| else |
| { |
| /* local symbol */ |
| struct elf_aarch64_local_symbol *l; |
| |
| l = elf_aarch64_locals (input_bfd); |
| return &l[r_symndx].tlsdesc_got_jump_table_offset; |
| } |
| } |
| |
| static void |
| symbol_tlsdesc_got_offset_mark (bfd *input_bfd, struct elf_link_hash_entry *h, |
| unsigned long r_symndx) |
| { |
| bfd_vma *p; |
| p = symbol_tlsdesc_got_offset_ref (input_bfd, h, r_symndx); |
| *p |= 1; |
| } |
| |
| static int |
| symbol_tlsdesc_got_offset_mark_p (bfd *input_bfd, |
| struct elf_link_hash_entry *h, |
| unsigned long r_symndx) |
| { |
| bfd_vma value; |
| value = * symbol_tlsdesc_got_offset_ref (input_bfd, h, r_symndx); |
| return value & 1; |
| } |
| |
| static bfd_vma |
| symbol_tlsdesc_got_offset (bfd *input_bfd, struct elf_link_hash_entry *h, |
| unsigned long r_symndx) |
| { |
| bfd_vma value; |
| value = * symbol_tlsdesc_got_offset_ref (input_bfd, h, r_symndx); |
| value &= ~1; |
| return value; |
| } |
| |
| /* Data for make_branch_to_erratum_835769_stub(). */ |
| |
| struct erratum_835769_branch_to_stub_data |
| { |
| struct bfd_link_info *info; |
| asection *output_section; |
| bfd_byte *contents; |
| }; |
| |
| /* Helper to insert branches to erratum 835769 stubs in the right |
| places for a particular section. */ |
| |
| static bfd_boolean |
| make_branch_to_erratum_835769_stub (struct bfd_hash_entry *gen_entry, |
| void *in_arg) |
| { |
| struct elf_aarch64_stub_hash_entry *stub_entry; |
| struct erratum_835769_branch_to_stub_data *data; |
| bfd_byte *contents; |
| unsigned long branch_insn = 0; |
| bfd_vma veneered_insn_loc, veneer_entry_loc; |
| bfd_signed_vma branch_offset; |
| unsigned int target; |
| bfd *abfd; |
| |
| stub_entry = (struct elf_aarch64_stub_hash_entry *) gen_entry; |
| data = (struct erratum_835769_branch_to_stub_data *) in_arg; |
| |
| if (stub_entry->target_section != data->output_section |
| || stub_entry->stub_type != aarch64_stub_erratum_835769_veneer) |
| return TRUE; |
| |
| contents = data->contents; |
| veneered_insn_loc = stub_entry->target_section->output_section->vma |
| + stub_entry->target_section->output_offset |
| + stub_entry->target_value; |
| veneer_entry_loc = stub_entry->stub_sec->output_section->vma |
| + stub_entry->stub_sec->output_offset |
| + stub_entry->stub_offset; |
| branch_offset = veneer_entry_loc - veneered_insn_loc; |
| |
| abfd = stub_entry->target_section->owner; |
| if (!aarch64_valid_branch_p (veneer_entry_loc, veneered_insn_loc)) |
| (*_bfd_error_handler) |
| (_("%B: error: Erratum 835769 stub out " |
| "of range (input file too large)"), abfd); |
| |
| target = stub_entry->target_value; |
| branch_insn = 0x14000000; |
| branch_offset >>= 2; |
| branch_offset &= 0x3ffffff; |
| branch_insn |= branch_offset; |
| bfd_putl32 (branch_insn, &contents[target]); |
| |
| return TRUE; |
| } |
| |
| |
| static bfd_boolean |
| _bfd_aarch64_erratum_843419_branch_to_stub (struct bfd_hash_entry *gen_entry, |
| void *in_arg) |
| { |
| struct elf_aarch64_stub_hash_entry *stub_entry |
| = (struct elf_aarch64_stub_hash_entry *) gen_entry; |
| struct erratum_835769_branch_to_stub_data *data |
| = (struct erratum_835769_branch_to_stub_data *) in_arg; |
| struct bfd_link_info *info; |
| struct elf_aarch64_link_hash_table *htab; |
| bfd_byte *contents; |
| asection *section; |
| bfd *abfd; |
| bfd_vma place; |
| uint32_t insn; |
| |
| info = data->info; |
| contents = data->contents; |
| section = data->output_section; |
| |
| htab = elf_aarch64_hash_table (info); |
| |
| if (stub_entry->target_section != section |
| || stub_entry->stub_type != aarch64_stub_erratum_843419_veneer) |
| return TRUE; |
| |
| insn = bfd_getl32 (contents + stub_entry->target_value); |
| bfd_putl32 (insn, |
| stub_entry->stub_sec->contents + stub_entry->stub_offset); |
| |
| place = (section->output_section->vma + section->output_offset |
| + stub_entry->adrp_offset); |
| insn = bfd_getl32 (contents + stub_entry->adrp_offset); |
| |
| if ((insn & AARCH64_ADRP_OP_MASK) != AARCH64_ADRP_OP) |
| abort (); |
| |
| bfd_signed_vma imm = |
| (_bfd_aarch64_sign_extend |
| ((bfd_vma) _bfd_aarch64_decode_adrp_imm (insn) << 12, 33) |
| - (place & 0xfff)); |
| |
| if (htab->fix_erratum_843419_adr |
| && (imm >= AARCH64_MIN_ADRP_IMM && imm <= AARCH64_MAX_ADRP_IMM)) |
| { |
| insn = (_bfd_aarch64_reencode_adr_imm (AARCH64_ADR_OP, imm) |
| | AARCH64_RT (insn)); |
| bfd_putl32 (insn, contents + stub_entry->adrp_offset); |
| } |
| else |
| { |
| bfd_vma veneered_insn_loc; |
| bfd_vma veneer_entry_loc; |
| bfd_signed_vma branch_offset; |
| uint32_t branch_insn; |
| |
| veneered_insn_loc = stub_entry->target_section->output_section->vma |
| + stub_entry->target_section->output_offset |
| + stub_entry->target_value; |
| veneer_entry_loc = stub_entry->stub_sec->output_section->vma |
| + stub_entry->stub_sec->output_offset |
| + stub_entry->stub_offset; |
| branch_offset = veneer_entry_loc - veneered_insn_loc; |
| |
| abfd = stub_entry->target_section->owner; |
| if (!aarch64_valid_branch_p (veneer_entry_loc, veneered_insn_loc)) |
| (*_bfd_error_handler) |
| (_("%B: error: Erratum 843419 stub out " |
| "of range (input file too large)"), abfd); |
| |
| branch_insn = 0x14000000; |
| branch_offset >>= 2; |
| branch_offset &= 0x3ffffff; |
| branch_insn |= branch_offset; |
| bfd_putl32 (branch_insn, contents + stub_entry->target_value); |
| } |
| return TRUE; |
| } |
| |
| |
| static bfd_boolean |
| elfNN_aarch64_write_section (bfd *output_bfd ATTRIBUTE_UNUSED, |
| struct bfd_link_info *link_info, |
| asection *sec, |
| bfd_byte *contents) |
| |
| { |
| struct elf_aarch64_link_hash_table *globals = |
| elf_aarch64_hash_table (link_info); |
| |
| if (globals == NULL) |
| return FALSE; |
| |
| /* Fix code to point to erratum 835769 stubs. */ |
| if (globals->fix_erratum_835769) |
| { |
| struct erratum_835769_branch_to_stub_data data; |
| |
| data.info = link_info; |
| data.output_section = sec; |
| data.contents = contents; |
| bfd_hash_traverse (&globals->stub_hash_table, |
| make_branch_to_erratum_835769_stub, &data); |
| } |
| |
| if (globals->fix_erratum_843419) |
| { |
| struct erratum_835769_branch_to_stub_data data; |
| |
| data.info = link_info; |
| data.output_section = sec; |
| data.contents = contents; |
| bfd_hash_traverse (&globals->stub_hash_table, |
| _bfd_aarch64_erratum_843419_branch_to_stub, &data); |
| } |
| |
| return FALSE; |
| } |
| |
| /* Perform a relocation as part of a final link. */ |
| static bfd_reloc_status_type |
| elfNN_aarch64_final_link_relocate (reloc_howto_type *howto, |
| bfd *input_bfd, |
| bfd *output_bfd, |
| asection *input_section, |
| bfd_byte *contents, |
| Elf_Internal_Rela *rel, |
| bfd_vma value, |
| struct bfd_link_info *info, |
| asection *sym_sec, |
| struct elf_link_hash_entry *h, |
| bfd_boolean *unresolved_reloc_p, |
| bfd_boolean save_addend, |
| bfd_vma *saved_addend, |
| Elf_Internal_Sym *sym) |
| { |
| Elf_Internal_Shdr *symtab_hdr; |
| unsigned int r_type = howto->type; |
| bfd_reloc_code_real_type bfd_r_type |
| = elfNN_aarch64_bfd_reloc_from_howto (howto); |
| bfd_reloc_code_real_type new_bfd_r_type; |
| unsigned long r_symndx; |
| bfd_byte *hit_data = contents + rel->r_offset; |
| bfd_vma place; |
| bfd_signed_vma signed_addend; |
| struct elf_aarch64_link_hash_table *globals; |
| bfd_boolean weak_undef_p; |
| |
| globals = elf_aarch64_hash_table (info); |
| |
| symtab_hdr = &elf_symtab_hdr (input_bfd); |
| |
| BFD_ASSERT (is_aarch64_elf (input_bfd)); |
| |
| r_symndx = ELFNN_R_SYM (rel->r_info); |
| |
| /* It is possible to have linker relaxations on some TLS access |
| models. Update our information here. */ |
| new_bfd_r_type = aarch64_tls_transition (input_bfd, info, r_type, h, r_symndx); |
| if (new_bfd_r_type != bfd_r_type) |
| { |
| bfd_r_type = new_bfd_r_type; |
| howto = elfNN_aarch64_howto_from_bfd_reloc (bfd_r_type); |
| BFD_ASSERT (howto != NULL); |
| r_type = howto->type; |
| } |
| |
| place = input_section->output_section->vma |
| + input_section->output_offset + rel->r_offset; |
| |
| /* Get addend, accumulating the addend for consecutive relocs |
| which refer to the same offset. */ |
| signed_addend = saved_addend ? *saved_addend : 0; |
| signed_addend += rel->r_addend; |
| |
| weak_undef_p = (h ? h->root.type == bfd_link_hash_undefweak |
| : bfd_is_und_section (sym_sec)); |
| |
| /* Since STT_GNU_IFUNC symbol must go through PLT, we handle |
| it here if it is defined in a non-shared object. */ |
| if (h != NULL |
| && h->type == STT_GNU_IFUNC |
| && h->def_regular) |
| { |
| asection *plt; |
| const char *name; |
| asection *base_got; |
| bfd_vma off; |
| |
| if ((input_section->flags & SEC_ALLOC) == 0 |
| || h->plt.offset == (bfd_vma) -1) |
| abort (); |
| |
| /* STT_GNU_IFUNC symbol must go through PLT. */ |
| plt = globals->root.splt ? globals->root.splt : globals->root.iplt; |
| value = (plt->output_section->vma + plt->output_offset + h->plt.offset); |
| |
| switch (bfd_r_type) |
| { |
| default: |
| if (h->root.root.string) |
| name = h->root.root.string; |
| else |
| name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, |
| NULL); |
| (*_bfd_error_handler) |
| (_("%B: relocation %s against STT_GNU_IFUNC " |
| "symbol `%s' isn't handled by %s"), input_bfd, |
| howto->name, name, __FUNCTION__); |
| bfd_set_error (bfd_error_bad_value); |
| return FALSE; |
| |
| case BFD_RELOC_AARCH64_NN: |
| if (rel->r_addend != 0) |
| { |
| if (h->root.root.string) |
| name = h->root.root.string; |
| else |
| name = bfd_elf_sym_name (input_bfd, symtab_hdr, |
| sym, NULL); |
| (*_bfd_error_handler) |
| (_("%B: relocation %s against STT_GNU_IFUNC " |
| "symbol `%s' has non-zero addend: %d"), |
| input_bfd, howto->name, name, rel->r_addend); |
| bfd_set_error (bfd_error_bad_value); |
| return FALSE; |
| } |
| |
| /* Generate dynamic relocation only when there is a |
| non-GOT reference in a shared object. */ |
| if (info->shared && h->non_got_ref) |
| { |
| Elf_Internal_Rela outrel; |
| asection *sreloc; |
| |
| /* Need a dynamic relocation to get the real function |
| address. */ |
| outrel.r_offset = _bfd_elf_section_offset (output_bfd, |
| info, |
| input_section, |
| rel->r_offset); |
| if (outrel.r_offset == (bfd_vma) -1 |
| || outrel.r_offset == (bfd_vma) -2) |
| abort (); |
| |
| outrel.r_offset += (input_section->output_section->vma |
| + input_section->output_offset); |
| |
| if (h->dynindx == -1 |
| || h->forced_local |
| || info->executable) |
| { |
| /* This symbol is resolved locally. */ |
| outrel.r_info = ELFNN_R_INFO (0, AARCH64_R (IRELATIVE)); |
| outrel.r_addend = (h->root.u.def.value |
| + h->root.u.def.section->output_section->vma |
| + h->root.u.def.section->output_offset); |
| } |
| else |
| { |
| outrel.r_info = ELFNN_R_INFO (h->dynindx, r_type); |
| outrel.r_addend = 0; |
| } |
| |
| sreloc = globals->root.irelifunc; |
| elf_append_rela (output_bfd, sreloc, &outrel); |
| |
| /* If this reloc is against an external symbol, we |
| do not want to fiddle with the addend. Otherwise, |
| we need to include the symbol value so that it |
| becomes an addend for the dynamic reloc. For an |
| internal symbol, we have updated addend. */ |
| return bfd_reloc_ok; |
| } |
| /* FALLTHROUGH */ |
| case BFD_RELOC_AARCH64_JUMP26: |
| case BFD_RELOC_AARCH64_CALL26: |
| value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value, |
| signed_addend, |
| weak_undef_p); |
| return _bfd_aarch64_elf_put_addend (input_bfd, hit_data, bfd_r_type, |
| howto, value); |
| case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC: |
| case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC: |
| case BFD_RELOC_AARCH64_ADR_GOT_PAGE: |
| case BFD_RELOC_AARCH64_GOT_LD_PREL19: |
| base_got = globals->root.sgot; |
| off = h->got.offset; |
| |
| if (base_got == NULL) |
| abort (); |
| |
| if (off == (bfd_vma) -1) |
| { |
| bfd_vma plt_index; |
| |
| /* We can't use h->got.offset here to save state, or |
| even just remember the offset, as finish_dynamic_symbol |
| would use that as offset into .got. */ |
| |
| if (globals->root.splt != NULL) |
| { |
| plt_index = ((h->plt.offset - globals->plt_header_size) / |
| globals->plt_entry_size); |
| off = (plt_index + 3) * GOT_ENTRY_SIZE; |
| base_got = globals->root.sgotplt; |
| } |
| else |
| { |
| plt_index = h->plt.offset / globals->plt_entry_size; |
| off = plt_index * GOT_ENTRY_SIZE; |
| base_got = globals->root.igotplt; |
| } |
| |
| if (h->dynindx == -1 |
| || h->forced_local |
| || info->symbolic) |
| { |
| /* This references the local definition. We must |
| initialize this entry in the global offset table. |
| Since the offset must always be a multiple of 8, |
| we use the least significant bit to record |
| whether we have initialized it already. |
| |
| When doing a dynamic link, we create a .rela.got |
| relocation entry to initialize the value. This |
| is done in the finish_dynamic_symbol routine. */ |
| if ((off & 1) != 0) |
| off &= ~1; |
| else |
| { |
| bfd_put_NN (output_bfd, value, |
| base_got->contents + off); |
| /* Note that this is harmless as -1 | 1 still is -1. */ |
| h->got.offset |= 1; |
| } |
| } |
| value = (base_got->output_section->vma |
| + base_got->output_offset + off); |
| } |
| else |
| value = aarch64_calculate_got_entry_vma (h, globals, info, |
| value, output_bfd, |
| unresolved_reloc_p); |
| value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value, |
| 0, weak_undef_p); |
| return _bfd_aarch64_elf_put_addend (input_bfd, hit_data, bfd_r_type, howto, value); |
| case BFD_RELOC_AARCH64_ADR_HI21_PCREL: |
| case BFD_RELOC_AARCH64_ADD_LO12: |
| break; |
| } |
| } |
| |
| switch (bfd_r_type) |
| { |
| case BFD_RELOC_AARCH64_NONE: |
| case BFD_RELOC_AARCH64_TLSDESC_CALL: |
| *unresolved_reloc_p = FALSE; |
| return bfd_reloc_ok; |
| |
| case BFD_RELOC_AARCH64_NN: |
| |
| /* When generating a shared object or relocatable executable, these |
| relocations are copied into the output file to be resolved at |
| run time. */ |
| if (((info->shared == TRUE) || globals->root.is_relocatable_executable) |
| && (input_section->flags & SEC_ALLOC) |
| && (h == NULL |
| || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
| || h->root.type != bfd_link_hash_undefweak)) |
| { |
| Elf_Internal_Rela outrel; |
| bfd_byte *loc; |
| bfd_boolean skip, relocate; |
| asection *sreloc; |
| |
| *unresolved_reloc_p = FALSE; |
| |
| skip = FALSE; |
| relocate = FALSE; |
| |
| outrel.r_addend = signed_addend; |
| outrel.r_offset = |
| _bfd_elf_section_offset (output_bfd, info, input_section, |
| rel->r_offset); |
| if (outrel.r_offset == (bfd_vma) - 1) |
| skip = TRUE; |
| else if (outrel.r_offset == (bfd_vma) - 2) |
| { |
| skip = TRUE; |
| relocate = TRUE; |
| } |
| |
| outrel.r_offset += (input_section->output_section->vma |
| + input_section->output_offset); |
| |
| if (skip) |
| memset (&outrel, 0, sizeof outrel); |
| else if (h != NULL |
| && h->dynindx != -1 |
| && (!info->shared || !info->symbolic || !h->def_regular)) |
| outrel.r_info = ELFNN_R_INFO (h->dynindx, r_type); |
| else |
| { |
| int symbol; |
| |
| /* On SVR4-ish systems, the dynamic loader cannot |
| relocate the text and data segments independently, |
| so the symbol does not matter. */ |
| symbol = 0; |
| outrel.r_info = ELFNN_R_INFO (symbol, AARCH64_R (RELATIVE)); |
| outrel.r_addend += value; |
| } |
| |
| sreloc = elf_section_data (input_section)->sreloc; |
| if (sreloc == NULL || sreloc->contents == NULL) |
| return bfd_reloc_notsupported; |
| |
| loc = sreloc->contents + sreloc->reloc_count++ * RELOC_SIZE (globals); |
| bfd_elfNN_swap_reloca_out (output_bfd, &outrel, loc); |
| |
| if (sreloc->reloc_count * RELOC_SIZE (globals) > sreloc->size) |
| { |
| /* Sanity to check that we have previously allocated |
| sufficient space in the relocation section for the |
| number of relocations we actually want to emit. */ |
| abort (); |
| } |
| |
| /* If this reloc is against an external symbol, we do not want to |
| fiddle with the addend. Otherwise, we need to include the symbol |
| value so that it becomes an addend for the dynamic reloc. */ |
| if (!relocate) |
| return bfd_reloc_ok; |
| |
| return _bfd_final_link_relocate (howto, input_bfd, input_section, |
| contents, rel->r_offset, value, |
| signed_addend); |
| } |
| else |
| value += signed_addend; |
| break; |
| |
| case BFD_RELOC_AARCH64_JUMP26: |
| case BFD_RELOC_AARCH64_CALL26: |
| { |
| asection *splt = globals->root.splt; |
| bfd_boolean via_plt_p = |
| splt != NULL && h != NULL && h->plt.offset != (bfd_vma) - 1; |
| |
| /* A call to an undefined weak symbol is converted to a jump to |
| the next instruction unless a PLT entry will be created. |
| The jump to the next instruction is optimized as a NOP. |
| Do the same for local undefined symbols. */ |
| if (weak_undef_p && ! via_plt_p) |
| { |
| bfd_putl32 (INSN_NOP, hit_data); |
| return bfd_reloc_ok; |
| } |
| |
| /* If the call goes through a PLT entry, make sure to |
| check distance to the right destination address. */ |
| if (via_plt_p) |
| { |
| value = (splt->output_section->vma |
| + splt->output_offset + h->plt.offset); |
| *unresolved_reloc_p = FALSE; |
| } |
| |
| /* If the target symbol is global and marked as a function the |
| relocation applies a function call or a tail call. In this |
| situation we can veneer out of range branches. The veneers |
| use IP0 and IP1 hence cannot be used arbitrary out of range |
| branches that occur within the body of a function. */ |
| if (h && h->type == STT_FUNC) |
| { |
| /* Check if a stub has to be inserted because the destination |
| is too far away. */ |
| if (! aarch64_valid_branch_p (value, place)) |
| { |
| /* The target is out of reach, so redirect the branch to |
| the local stub for this function. */ |
| struct elf_aarch64_stub_hash_entry *stub_entry; |
| stub_entry = elfNN_aarch64_get_stub_entry (input_section, |
| sym_sec, h, |
| rel, globals); |
| if (stub_entry != NULL) |
| value = (stub_entry->stub_offset |
| + stub_entry->stub_sec->output_offset |
| + stub_entry->stub_sec->output_section->vma); |
| } |
| } |
| } |
| value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value, |
| signed_addend, weak_undef_p); |
| break; |
| |
| case BFD_RELOC_AARCH64_16: |
| #if ARCH_SIZE == 64 |
| case BFD_RELOC_AARCH64_32: |
| #endif |
| case BFD_RELOC_AARCH64_ADD_LO12: |
| case BFD_RELOC_AARCH64_ADR_LO21_PCREL: |
| case BFD_RELOC_AARCH64_ADR_HI21_PCREL: |
| case BFD_RELOC_AARCH64_ADR_HI21_NC_PCREL: |
| case BFD_RELOC_AARCH64_BRANCH19: |
| case BFD_RELOC_AARCH64_LD_LO19_PCREL: |
| case BFD_RELOC_AARCH64_LDST8_LO12: |
| case BFD_RELOC_AARCH64_LDST16_LO12: |
| case BFD_RELOC_AARCH64_LDST32_LO12: |
| case BFD_RELOC_AARCH64_LDST64_LO12: |
| case BFD_RELOC_AARCH64_LDST128_LO12: |
| case BFD_RELOC_AARCH64_MOVW_G0_S: |
| case BFD_RELOC_AARCH64_MOVW_G1_S: |
| case BFD_RELOC_AARCH64_MOVW_G2_S: |
| case BFD_RELOC_AARCH64_MOVW_G0: |
| case BFD_RELOC_AARCH64_MOVW_G0_NC: |
| case BFD_RELOC_AARCH64_MOVW_G1: |
| case BFD_RELOC_AARCH64_MOVW_G1_NC: |
| case BFD_RELOC_AARCH64_MOVW_G2: |
| case BFD_RELOC_AARCH64_MOVW_G2_NC: |
| case BFD_RELOC_AARCH64_MOVW_G3: |
| case BFD_RELOC_AARCH64_16_PCREL: |
| case BFD_RELOC_AARCH64_32_PCREL: |
| case BFD_RELOC_AARCH64_64_PCREL: |
| case BFD_RELOC_AARCH64_TSTBR14: |
| value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value, |
| signed_addend, weak_undef_p); |
| break; |
| |
| case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC: |
| case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC: |
| case BFD_RELOC_AARCH64_ADR_GOT_PAGE: |
| case BFD_RELOC_AARCH64_GOT_LD_PREL19: |
| if (globals->root.sgot == NULL) |
| BFD_ASSERT (h != NULL); |
| |
| if (h != NULL) |
| { |
| value = aarch64_calculate_got_entry_vma (h, globals, info, value, |
| output_bfd, |
| unresolved_reloc_p); |
| value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value, |
| 0, weak_undef_p); |
| } |
| break; |
| |
| case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21: |
| case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC: |
| case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21: |
| case BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC: |
| case BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC: |
| if (globals->root.sgot == NULL) |
| return bfd_reloc_notsupported; |
| |
| value = (symbol_got_offset (input_bfd, h, r_symndx) |
| + globals->root.sgot->output_section->vma |
| + globals->root.sgot->output_offset); |
| |
| value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value, |
| 0, weak_undef_p); |
| *unresolved_reloc_p = FALSE; |
| break; |
| |
| case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12: |
| case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12: |
| case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12_NC: |
| case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0: |
| case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC: |
| case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1: |
| case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC: |
| case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2: |
| value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value, |
| signed_addend - tpoff_base (info), |
| weak_undef_p); |
| *unresolved_reloc_p = FALSE; |
| break; |
| |
| case BFD_RELOC_AARCH64_TLSDESC_ADD: |
| case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC: |
| case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21: |
| case BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC: |
| case BFD_RELOC_AARCH64_TLSDESC_LD64_LO12_NC: |
| case BFD_RELOC_AARCH64_TLSDESC_LDR: |
| if (globals->root.sgot == NULL) |
| return bfd_reloc_notsupported; |
| value = (symbol_tlsdesc_got_offset (input_bfd, h, r_symndx) |
| + globals->root.sgotplt->output_section->vma |
| + globals->root.sgotplt->output_offset |
| + globals->sgotplt_jump_table_size); |
| |
| value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value, |
| 0, weak_undef_p); |
| *unresolved_reloc_p = FALSE; |
| break; |
| |
| default: |
| return bfd_reloc_notsupported; |
| } |
| |
| if (saved_addend) |
| *saved_addend = value; |
| |
| /* Only apply the final relocation in a sequence. */ |
| if (save_addend) |
| return bfd_reloc_continue; |
| |
| return _bfd_aarch64_elf_put_addend (input_bfd, hit_data, bfd_r_type, |
| howto, value); |
| } |
| |
| /* Handle TLS relaxations. Relaxing is possible for symbols that use |
| R_AARCH64_TLSDESC_ADR_{PAGE, LD64_LO12_NC, ADD_LO12_NC} during a static |
| link. |
| |
| Return bfd_reloc_ok if we're done, bfd_reloc_continue if the caller |
| is to then call final_link_relocate. Return other values in the |
| case of error. */ |
| |
| static bfd_reloc_status_type |
| elfNN_aarch64_tls_relax (struct elf_aarch64_link_hash_table *globals, |
| bfd *input_bfd, bfd_byte *contents, |
| Elf_Internal_Rela *rel, struct elf_link_hash_entry *h) |
| { |
| bfd_boolean is_local = h == NULL; |
| unsigned int r_type = ELFNN_R_TYPE (rel->r_info); |
| unsigned long insn; |
| |
| BFD_ASSERT (globals && input_bfd && contents && rel); |
| |
| switch (elfNN_aarch64_bfd_reloc_from_type (r_type)) |
| { |
| case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21: |
| case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21: |
| if (is_local) |
| { |
| /* GD->LE relaxation: |
| adrp x0, :tlsgd:var => movz x0, :tprel_g1:var |
| or |
| adrp x0, :tlsdesc:var => movz x0, :tprel_g1:var |
| */ |
| bfd_putl32 (0xd2a00000, contents + rel->r_offset); |
| return bfd_reloc_continue; |
| } |
| else |
| { |
| /* GD->IE relaxation: |
| adrp x0, :tlsgd:var => adrp x0, :gottprel:var |
| or |
| adrp x0, :tlsdesc:var => adrp x0, :gottprel:var |
| */ |
| return bfd_reloc_continue; |
| } |
| |
| case BFD_RELOC_AARCH64_TLSDESC_LDNN_LO12_NC: |
| if (is_local) |
| { |
| /* GD->LE relaxation: |
| ldr xd, [x0, #:tlsdesc_lo12:var] => movk x0, :tprel_g0_nc:var |
| */ |
| bfd_putl32 (0xf2800000, contents + rel->r_offset); |
| return bfd_reloc_continue; |
| } |
| else |
| { |
| /* GD->IE relaxation: |
| ldr xd, [x0, #:tlsdesc_lo12:var] => ldr x0, [x0, #:gottprel_lo12:var] |
| */ |
| insn = bfd_getl32 (contents + rel->r_offset); |
| insn &= 0xffffffe0; |
| bfd_putl32 (insn, contents + rel->r_offset); |
| return bfd_reloc_continue; |
| } |
| |
| case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC: |
| if (is_local) |
| { |
| /* GD->LE relaxation |
| add x0, #:tlsgd_lo12:var => movk x0, :tprel_g0_nc:var |
| bl __tls_get_addr => mrs x1, tpidr_el0 |
| nop => add x0, x1, x0 |
| */ |
| |
| /* First kill the tls_get_addr reloc on the bl instruction. */ |
| BFD_ASSERT (rel->r_offset + 4 == rel[1].r_offset); |
| rel[1].r_info = ELFNN_R_INFO (STN_UNDEF, R_AARCH64_NONE); |
| |
| bfd_putl32 (0xf2800000, contents + rel->r_offset); |
| bfd_putl32 (0xd53bd041, contents + rel->r_offset + 4); |
| bfd_putl32 (0x8b000020, contents + rel->r_offset + 8); |
| return bfd_reloc_continue; |
| } |
| else |
| { |
| /* GD->IE relaxation |
| ADD x0, #:tlsgd_lo12:var => ldr x0, [x0, #:gottprel_lo12:var] |
| BL __tls_get_addr => mrs x1, tpidr_el0 |
| R_AARCH64_CALL26 |
| NOP => add x0, x1, x0 |
| */ |
| |
| BFD_ASSERT (ELFNN_R_TYPE (rel[1].r_info) == AARCH64_R (CALL26)); |
| |
| /* Remove the relocation on the BL instruction. */ |
| rel[1].r_info = ELFNN_R_INFO (STN_UNDEF, R_AARCH64_NONE); |
| |
| bfd_putl32 (0xf9400000, contents + rel->r_offset); |
| |
| /* We choose to fixup the BL and NOP instructions using the |
| offset from the second relocation to allow flexibility in |
| scheduling instructions between the ADD and BL. */ |
| bfd_putl32 (0xd53bd041, contents + rel[1].r_offset); |
| bfd_putl32 (0x8b000020, contents + rel[1].r_offset + 4); |
| return bfd_reloc_continue; |
| } |
| |
| case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC: |
| case BFD_RELOC_AARCH64_TLSDESC_CALL: |
| /* GD->IE/LE relaxation: |
| add x0, x0, #:tlsdesc_lo12:var => nop |
| blr xd => nop |
| */ |
| bfd_putl32 (INSN_NOP, contents + rel->r_offset); |
| return bfd_reloc_ok; |
| |
| case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21: |
| /* IE->LE relaxation: |
| adrp xd, :gottprel:var => movz xd, :tprel_g1:var |
| */ |
| if (is_local) |
| { |
| insn = bfd_getl32 (contents + rel->r_offset); |
| bfd_putl32 (0xd2a00000 | (insn & 0x1f), contents + rel->r_offset); |
| } |
| return bfd_reloc_continue; |
| |
| case BFD_RELOC_AARCH64_TLSIE_LDNN_GOTTPREL_LO12_NC: |
| /* IE->LE relaxation: |
| ldr xd, [xm, #:gottprel_lo12:var] => movk xd, :tprel_g0_nc:var |
| */ |
| if (is_local) |
| { |
| insn = bfd_getl32 (contents + rel->r_offset); |
| bfd_putl32 (0xf2800000 | (insn & 0x1f), contents + rel->r_offset); |
| } |
| return bfd_reloc_continue; |
| |
| default: |
| return bfd_reloc_continue; |
| } |
| |
| return bfd_reloc_ok; |
| } |
| |
| /* Relocate an AArch64 ELF section. */ |
| |
| static bfd_boolean |
| elfNN_aarch64_relocate_section (bfd *output_bfd, |
| struct bfd_link_info *info, |
| bfd *input_bfd, |
| asection *input_section, |
| bfd_byte *contents, |
| Elf_Internal_Rela *relocs, |
| Elf_Internal_Sym *local_syms, |
| asection **local_sections) |
| { |
| Elf_Internal_Shdr *symtab_hdr; |
| struct elf_link_hash_entry **sym_hashes; |
| Elf_Internal_Rela *rel; |
| Elf_Internal_Rela *relend; |
| const char *name; |
| struct elf_aarch64_link_hash_table *globals; |
| bfd_boolean save_addend = FALSE; |
| bfd_vma addend = 0; |
| |
| globals = elf_aarch64_hash_table (info); |
| |
| symtab_hdr = &elf_symtab_hdr (input_bfd); |
| sym_hashes = elf_sym_hashes (input_bfd); |
| |
| rel = relocs; |
| relend = relocs + input_section->reloc_count; |
| for (; rel < relend; rel++) |
| { |
| unsigned int r_type; |
| bfd_reloc_code_real_type bfd_r_type; |
| bfd_reloc_code_real_type relaxed_bfd_r_type; |
| reloc_howto_type *howto; |
| unsigned long r_symndx; |
| Elf_Internal_Sym *sym; |
| asection *sec; |
| struct elf_link_hash_entry *h; |
| bfd_vma relocation; |
| bfd_reloc_status_type r; |
| arelent bfd_reloc; |
| char sym_type; |
| bfd_boolean unresolved_reloc = FALSE; |
| char *error_message = NULL; |
| |
| r_symndx = ELFNN_R_SYM (rel->r_info); |
| r_type = ELFNN_R_TYPE (rel->r_info); |
| |
| bfd_reloc.howto = elfNN_aarch64_howto_from_type (r_type); |
| howto = bfd_reloc.howto; |
| |
| if (howto == NULL) |
| { |
| (*_bfd_error_handler) |
| (_("%B: unrecognized relocation (0x%x) in section `%A'"), |
| input_bfd, input_section, r_type); |
| return FALSE; |
| } |
| bfd_r_type = elfNN_aarch64_bfd_reloc_from_howto (howto); |
| |
| h = NULL; |
| sym = NULL; |
| sec = NULL; |
| |
| if (r_symndx < symtab_hdr->sh_info) |
| { |
| sym = local_syms + r_symndx; |
| sym_type = ELFNN_ST_TYPE (sym->st_info); |
| sec = local_sections[r_symndx]; |
| |
| /* An object file might have a reference to a local |
| undefined symbol. This is a daft object file, but we |
| should at least do something about it. */ |
| if (r_type != R_AARCH64_NONE && r_type != R_AARCH64_NULL |
| && bfd_is_und_section (sec) |
| && ELF_ST_BIND (sym->st_info) != STB_WEAK) |
| { |
| if (!info->callbacks->undefined_symbol |
| (info, bfd_elf_string_from_elf_section |
| (input_bfd, symtab_hdr->sh_link, sym->st_name), |
| input_bfd, input_section, rel->r_offset, TRUE)) |
| return FALSE; |
| } |
| |
| relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); |
| |
| /* Relocate against local STT_GNU_IFUNC symbol. */ |
| if (!info->relocatable |
| && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC) |
| { |
| h = elfNN_aarch64_get_local_sym_hash (globals, input_bfd, |
| rel, FALSE); |
| if (h == NULL) |
| abort (); |
| |
| /* Set STT_GNU_IFUNC symbol value. */ |
| h->root.u.def.value = sym->st_value; |
| h->root.u.def.section = sec; |
| } |
| } |
| else |
| { |
| bfd_boolean warned, ignored; |
| |
| RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
| r_symndx, symtab_hdr, sym_hashes, |
| h, sec, relocation, |
| unresolved_reloc, warned, ignored); |
| |
| sym_type = h->type; |
| } |
| |
| if (sec != NULL && discarded_section (sec)) |
| RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, |
| rel, 1, relend, howto, 0, contents); |
| |
| if (info->relocatable) |
| continue; |
| |
| if (h != NULL) |
| name = h->root.root.string; |
| else |
| { |
| name = (bfd_elf_string_from_elf_section |
| (input_bfd, symtab_hdr->sh_link, sym->st_name)); |
| if (name == NULL || *name == '\0') |
| name = bfd_section_name (input_bfd, sec); |
| } |
| |
| if (r_symndx != 0 |
| && r_type != R_AARCH64_NONE |
| && r_type != R_AARCH64_NULL |
| && (h == NULL |
| || h->root.type == bfd_link_hash_defined |
| || h->root.type == bfd_link_hash_defweak) |
| && IS_AARCH64_TLS_RELOC (bfd_r_type) != (sym_type == STT_TLS)) |
| { |
| (*_bfd_error_handler) |
| ((sym_type == STT_TLS |
| ? _("%B(%A+0x%lx): %s used with TLS symbol %s") |
| : _("%B(%A+0x%lx): %s used with non-TLS symbol %s")), |
| input_bfd, |
| input_section, (long) rel->r_offset, howto->name, name); |
| } |
| |
| /* We relax only if we can see that there can be a valid transition |
| from a reloc type to another. |
| We call elfNN_aarch64_final_link_relocate unless we're completely |
| done, i.e., the relaxation produced the final output we want. */ |
| |
| relaxed_bfd_r_type = aarch64_tls_transition (input_bfd, info, r_type, |
| h, r_symndx); |
| if (relaxed_bfd_r_type != bfd_r_type) |
| { |
| bfd_r_type = relaxed_bfd_r_type; |
| howto = elfNN_aarch64_howto_from_bfd_reloc (bfd_r_type); |
| BFD_ASSERT (howto != NULL); |
| r_type = howto->type; |
| r = elfNN_aarch64_tls_relax (globals, input_bfd, contents, rel, h); |
| unresolved_reloc = 0; |
| } |
| else |
| r = bfd_reloc_continue; |
| |
| /* There may be multiple consecutive relocations for the |
| same offset. In that case we are supposed to treat the |
| output of each relocation as the addend for the next. */ |
| if (rel + 1 < relend |
| && rel->r_offset == rel[1].r_offset |
| && ELFNN_R_TYPE (rel[1].r_info) != R_AARCH64_NONE |
| && ELFNN_R_TYPE (rel[1].r_info) != R_AARCH64_NULL) |
| save_addend = TRUE; |
| else |
| save_addend = FALSE; |
| |
| if (r == bfd_reloc_continue) |
| r = elfNN_aarch64_final_link_relocate (howto, input_bfd, output_bfd, |
| input_section, contents, rel, |
| relocation, info, sec, |
| h, &unresolved_reloc, |
| save_addend, &addend, sym); |
| |
| switch (elfNN_aarch64_bfd_reloc_from_type (r_type)) |
| { |
| case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21: |
| case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC: |
| if (! symbol_got_offset_mark_p (input_bfd, h, r_symndx)) |
| { |
| bfd_boolean need_relocs = FALSE; |
| bfd_byte *loc; |
| int indx; |
| bfd_vma off; |
| |
| off = symbol_got_offset (input_bfd, h, r_symndx); |
| indx = h && h->dynindx != -1 ? h->dynindx : 0; |
| |
| need_relocs = |
| (info->shared || indx != 0) && |
| (h == NULL |
| || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
| || h->root.type != bfd_link_hash_undefweak); |
| |
| BFD_ASSERT (globals->root.srelgot != NULL); |
| |
| if (need_relocs) |
| { |
| Elf_Internal_Rela rela; |
| rela.r_info = ELFNN_R_INFO (indx, AARCH64_R (TLS_DTPMOD)); |
| rela.r_addend = 0; |
| rela.r_offset = globals->root.sgot->output_section->vma + |
| globals->root.sgot->output_offset + off; |
| |
| |
| loc = globals->root.srelgot->contents; |
| loc += globals->root.srelgot->reloc_count++ |
| * RELOC_SIZE (htab); |
| bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc); |
| |
| if (indx == 0) |
| { |
| bfd_put_NN (output_bfd, |
| relocation - dtpoff_base (info), |
| globals->root.sgot->contents + off |
| + GOT_ENTRY_SIZE); |
| } |
| else |
| { |
| /* This TLS symbol is global. We emit a |
| relocation to fixup the tls offset at load |
| time. */ |
| rela.r_info = |
| ELFNN_R_INFO (indx, AARCH64_R (TLS_DTPREL)); |
| rela.r_addend = 0; |
| rela.r_offset = |
| (globals->root.sgot->output_section->vma |
| + globals->root.sgot->output_offset + off |
| + GOT_ENTRY_SIZE); |
| |
| loc = globals->root.srelgot->contents; |
| loc += globals->root.srelgot->reloc_count++ |
| * RELOC_SIZE (globals); |
| bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc); |
| bfd_put_NN (output_bfd, (bfd_vma) 0, |
| globals->root.sgot->contents + off |
| + GOT_ENTRY_SIZE); |
| } |
| } |
| else |
| { |
| bfd_put_NN (output_bfd, (bfd_vma) 1, |
| globals->root.sgot->contents + off); |
| bfd_put_NN (output_bfd, |
| relocation - dtpoff_base (info), |
| globals->root.sgot->contents + off |
| + GOT_ENTRY_SIZE); |
| } |
| |
| symbol_got_offset_mark (input_bfd, h, r_symndx); |
| } |
| break; |
| |
| case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21: |
| case BFD_RELOC_AARCH64_TLSIE_LDNN_GOTTPREL_LO12_NC: |
| if (! symbol_got_offset_mark_p (input_bfd, h, r_symndx)) |
| { |
| bfd_boolean need_relocs = FALSE; |
| bfd_byte *loc; |
| int indx; |
| bfd_vma off; |
| |
| off = symbol_got_offset (input_bfd, h, r_symndx); |
| |
| indx = h && h->dynindx != -1 ? h->dynindx : 0; |
| |
| need_relocs = |
| (info->shared || indx != 0) && |
| (h == NULL |
| || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
| || h->root.type != bfd_link_hash_undefweak); |
| |
| BFD_ASSERT (globals->root.srelgot != NULL); |
| |
| if (need_relocs) |
| { |
| Elf_Internal_Rela rela; |
| |
| if (indx == 0) |
| rela.r_addend = relocation - dtpoff_base (info); |
| else |
| rela.r_addend = 0; |
| |
| rela.r_info = ELFNN_R_INFO (indx, AARCH64_R (TLS_TPREL)); |
| rela.r_offset = globals->root.sgot->output_section->vma + |
| globals->root.sgot->output_offset + off; |
| |
| loc = globals->root.srelgot->contents; |
| loc += globals->root.srelgot->reloc_count++ |
| * RELOC_SIZE (htab); |
| |
| bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc); |
| |
| bfd_put_NN (output_bfd, rela.r_addend, |
| globals->root.sgot->contents + off); |
| } |
| else |
| bfd_put_NN (output_bfd, relocation - tpoff_base (info), |
| globals->root.sgot->contents + off); |
| |
| symbol_got_offset_mark (input_bfd, h, r_symndx); |
| } |
| break; |
| |
| case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12: |
| case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12: |
| case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12_NC: |
| case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2: |
| case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1: |
| case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC: |
| case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0: |
| case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC: |
| break; |
| |
| case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC: |
| case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21: |
| case BFD_RELOC_AARCH64_TLSDESC_LDNN_LO12_NC: |
| if (! symbol_tlsdesc_got_offset_mark_p (input_bfd, h, r_symndx)) |
| { |
| bfd_boolean need_relocs = FALSE; |
| int indx = h && h->dynindx != -1 ? h->dynindx : 0; |
| bfd_vma off = symbol_tlsdesc_got_offset (input_bfd, h, r_symndx); |
| |
| need_relocs = (h == NULL |
| || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
| || h->root.type != bfd_link_hash_undefweak); |
| |
| BFD_ASSERT (globals->root.srelgot != NULL); |
| BFD_ASSERT (globals->root.sgot != NULL); |
| |
| if (need_relocs) |
| { |
| bfd_byte *loc; |
| Elf_Internal_Rela rela; |
| rela.r_info = ELFNN_R_INFO (indx, AARCH64_R (TLSDESC)); |
| |
| rela.r_addend = 0; |
| rela.r_offset = (globals->root.sgotplt->output_section->vma |
| + globals->root.sgotplt->output_offset |
| + off + globals->sgotplt_jump_table_size); |
| |
| if (indx == 0) |
| rela.r_addend = relocation - dtpoff_base (info); |
| |
| /* Allocate the next available slot in the PLT reloc |
| section to hold our R_AARCH64_TLSDESC, the next |
| available slot is determined from reloc_count, |
| which we step. But note, reloc_count was |
| artifically moved down while allocating slots for |
| real PLT relocs such that all of the PLT relocs |
| will fit above the initial reloc_count and the |
| extra stuff will fit below. */ |
| loc = globals->root.srelplt->contents; |
| loc += globals->root.srelplt->reloc_count++ |
| * RELOC_SIZE (globals); |
| |
| bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc); |
| |
| bfd_put_NN (output_bfd, (bfd_vma) 0, |
| globals->root.sgotplt->contents + off + |
| globals->sgotplt_jump_table_size); |
| bfd_put_NN (output_bfd, (bfd_vma) 0, |
| globals->root.sgotplt->contents + off + |
| globals->sgotplt_jump_table_size + |
| GOT_ENTRY_SIZE); |
| } |
| |
| symbol_tlsdesc_got_offset_mark (input_bfd, h, r_symndx); |
| } |
| break; |
| default: |
| break; |
| } |
| |
| if (!save_addend) |
| addend = 0; |
| |
| |
| /* Dynamic relocs are not propagated for SEC_DEBUGGING sections |
| because such sections are not SEC_ALLOC and thus ld.so will |
| not process them. */ |
| if (unresolved_reloc |
| && !((input_section->flags & SEC_DEBUGGING) != 0 |
| && h->def_dynamic) |
| && _bfd_elf_section_offset (output_bfd, info, input_section, |
| +rel->r_offset) != (bfd_vma) - 1) |
| { |
| (*_bfd_error_handler) |
| (_ |
| ("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"), |
| input_bfd, input_section, (long) rel->r_offset, howto->name, |
| h->root.root.string); |
| return FALSE; |
| } |
| |
| if (r != bfd_reloc_ok && r != bfd_reloc_continue) |
| { |
| switch (r) |
| { |
| case bfd_reloc_overflow: |
| /* If the overflowing reloc was to an undefined symbol, |
| we have already printed one error message and there |
| is no point complaining again. */ |
| if ((!h || |
| h->root.type != bfd_link_hash_undefined) |
| && (!((*info->callbacks->reloc_overflow) |
| (info, (h ? &h->root : NULL), name, howto->name, |
| (bfd_vma) 0, input_bfd, input_section, |
| rel->r_offset)))) |
| return FALSE; |
| break; |
| |
| case bfd_reloc_undefined: |
| if (!((*info->callbacks->undefined_symbol) |
| (info, name, input_bfd, input_section, |
| rel->r_offset, TRUE))) |
| return FALSE; |
| break; |
| |
| case bfd_reloc_outofrange: |
| error_message = _("out of range"); |
| goto common_error; |
| |
| case bfd_reloc_notsupported: |
| error_message = _("unsupported relocation"); |
| goto common_error; |
| |
| case bfd_reloc_dangerous: |
| /* error_message should already be set. */ |
| goto common_error; |
| |
| default: |
| error_message = _("unknown error"); |
| /* Fall through. */ |
| |
| common_error: |
| BFD_ASSERT (error_message != NULL); |
| if (!((*info->callbacks->reloc_dangerous) |
| (info, error_message, input_bfd, input_section, |
| rel->r_offset))) |
| return FALSE; |
| break; |
| } |
| } |
| } |
| |
| return TRUE; |
| } |
| |
| /* Set the right machine number. */ |
| |
| static bfd_boolean |
| elfNN_aarch64_object_p (bfd *abfd) |
| { |
| #if ARCH_SIZE == 32 |
| bfd_default_set_arch_mach (abfd, bfd_arch_aarch64, bfd_mach_aarch64_ilp32); |
| #else |
| bfd_default_set_arch_mach (abfd, bfd_arch_aarch64, bfd_mach_aarch64); |
| #endif |
| return TRUE; |
| } |
| |
| /* Function to keep AArch64 specific flags in the ELF header. */ |
| |
| static bfd_boolean |
| elfNN_aarch64_set_private_flags (bfd *abfd, flagword flags) |
| { |
| if (elf_flags_init (abfd) && elf_elfheader (abfd)->e_flags != flags) |
| { |
| } |
| else |
| { |
| elf_elfheader (abfd)->e_flags = flags; |
| elf_flags_init (abfd) = TRUE; |
| } |
| |
| return TRUE; |
| } |
| |
| /* Merge backend specific data from an object file to the output |
| object file when linking. */ |
| |
| static bfd_boolean |
| elfNN_aarch64_merge_private_bfd_data (bfd *ibfd, bfd *obfd) |
| { |
| flagword out_flags; |
| flagword in_flags; |
| bfd_boolean flags_compatible = TRUE; |
| asection *sec; |
| |
| /* Check if we have the same endianess. */ |
| if (!_bfd_generic_verify_endian_match (ibfd, obfd)) |
| return FALSE; |
| |
| if (!is_aarch64_elf (ibfd) || !is_aarch64_elf (obfd)) |
| return TRUE; |
| |
| /* The input BFD must have had its flags initialised. */ |
| /* The following seems bogus to me -- The flags are initialized in |
| the assembler but I don't think an elf_flags_init field is |
| written into the object. */ |
| /* BFD_ASSERT (elf_flags_init (ibfd)); */ |
| |
| in_flags = elf_elfheader (ibfd)->e_flags; |
| out_flags = elf_elfheader (obfd)->e_flags; |
| |
| if (!elf_flags_init (obfd)) |
| { |
| /* If the input is the default architecture and had the default |
| flags then do not bother setting the flags for the output |
| architecture, instead allow future merges to do this. If no |
| future merges ever set these flags then they will retain their |
| uninitialised values, which surprise surprise, correspond |
| to the default values. */ |
| if (bfd_get_arch_info (ibfd)->the_default |
| && elf_elfheader (ibfd)->e_flags == 0) |
| return TRUE; |
| |
| elf_flags_init (obfd) = TRUE; |
| elf_elfheader (obfd)->e_flags = in_flags; |
| |
| if (bfd_get_arch (obfd) == bfd_get_arch (ibfd) |
| && bfd_get_arch_info (obfd)->the_default) |
| return bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), |
| bfd_get_mach (ibfd)); |
| |
| return TRUE; |
| } |
| |
| /* Identical flags must be compatible. */ |
| if (in_flags == out_flags) |
| return TRUE; |
| |
| /* Check to see if the input BFD actually contains any sections. If |
| not, its flags may not have been initialised either, but it |
| cannot actually cause any incompatiblity. Do not short-circuit |
| dynamic objects; their section list may be emptied by |
| elf_link_add_object_symbols. |
| |
| Also check to see if there are no code sections in the input. |
| In this case there is no need to check for code specific flags. |
| XXX - do we need to worry about floating-point format compatability |
| in data sections ? */ |
| if (!(ibfd->flags & DYNAMIC)) |
| { |
| bfd_boolean null_input_bfd = TRUE; |
| bfd_boolean only_data_sections = TRUE; |
| |
| for (sec = ibfd->sections; sec != NULL; sec = sec->next) |
| { |
| if ((bfd_get_section_flags (ibfd, sec) |
| & (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS)) |
| == (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS)) |
| only_data_sections = FALSE; |
| |
| null_input_bfd = FALSE; |
| break; |
| } |
| |
| if (null_input_bfd || only_data_sections) |
| return TRUE; |
| } |
| |
| return flags_compatible; |
| } |
| |
| /* Display the flags field. */ |
| |
| static bfd_boolean |
| elfNN_aarch64_print_private_bfd_data (bfd *abfd, void *ptr) |
| { |
| FILE *file = (FILE *) ptr; |
| unsigned long flags; |
| |
| BFD_ASSERT (abfd != NULL && ptr != NULL); |
| |
| /* Print normal ELF private data. */ |
| _bfd_elf_print_private_bfd_data (abfd, ptr); |
| |
| flags = elf_elfheader (abfd)->e_flags; |
| /* Ignore init flag - it may not be set, despite the flags field |
| containing valid data. */ |
| |
| /* xgettext:c-format */ |
| fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags); |
| |
| if (flags) |
| fprintf (file, _("<Unrecognised flag bits set>")); |
| |
| fputc ('\n', file); |
| |
| return TRUE; |
| } |
| |
| /* Update the got entry reference counts for the section being removed. */ |
| |
| static bfd_boolean |
| elfNN_aarch64_gc_sweep_hook (bfd *abfd, |
| struct bfd_link_info *info, |
| asection *sec, |
| const Elf_Internal_Rela * relocs) |
| { |
| struct elf_aarch64_link_hash_table *htab; |
| Elf_Internal_Shdr *symtab_hdr; |
| struct elf_link_hash_entry **sym_hashes; |
| struct elf_aarch64_local_symbol *locals; |
| const Elf_Internal_Rela *rel, *relend; |
| |
| if (info->relocatable) |
| return TRUE; |
| |
| htab = elf_aarch64_hash_table (info); |
| |
| if (htab == NULL) |
| return FALSE; |
| |
| elf_section_data (sec)->local_dynrel = NULL; |
| |
| symtab_hdr = &elf_symtab_hdr (abfd); |
| sym_hashes = elf_sym_hashes (abfd); |
| |
| locals = elf_aarch64_locals (abfd); |
| |
| relend = relocs + sec->reloc_count; |
| for (rel = relocs; rel < relend; rel++) |
| { |
| unsigned long r_symndx; |
| unsigned int r_type; |
| struct elf_link_hash_entry *h = NULL; |
| |
| r_symndx = ELFNN_R_SYM (rel->r_info); |
| |
| if (r_symndx >= symtab_hdr->sh_info) |
| { |
| |
| h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| while (h->root.type == bfd_link_hash_indirect |
| || h->root.type == bfd_link_hash_warning) |
| h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| } |
| else |
| { |
| Elf_Internal_Sym *isym; |
| |
| /* A local symbol. */ |
| isym = bfd_sym_from_r_symndx (&htab->sym_cache, |
| abfd, r_symndx); |
| |
| /* Check relocation against local STT_GNU_IFUNC symbol. */ |
| if (isym != NULL |
| && ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) |
| { |
| h = elfNN_aarch64_get_local_sym_hash (htab, abfd, rel, FALSE); |
| if (h == NULL) |
| abort (); |
| } |
| } |
| |
| if (h) |
| { |
| struct elf_aarch64_link_hash_entry *eh; |
| struct elf_dyn_relocs **pp; |
| struct elf_dyn_relocs *p; |
| |
| eh = (struct elf_aarch64_link_hash_entry *) h; |
| |
| for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next) |
| if (p->sec == sec) |
| { |
| /* Everything must go for SEC. */ |
| *pp = p->next; |
| break; |
| } |
| } |
| |
| r_type = ELFNN_R_TYPE (rel->r_info); |
| switch (aarch64_tls_transition (abfd,info, r_type, h ,r_symndx)) |
| { |
| case BFD_RELOC_AARCH64_ADR_GOT_PAGE: |
| case BFD_RELOC_AARCH64_GOT_LD_PREL19: |
| case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC: |
| case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC: |
| case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC: |
| case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21: |
| case BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC: |
| case BFD_RELOC_AARCH64_TLSDESC_LD64_LO12_NC: |
| case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC: |
| case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21: |
| case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21: |
| case BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC: |
| case BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC: |
| case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12: |
| case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12: |
| case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12_NC: |
| case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0: |
| case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC: |
| case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1: |
| case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC: |
| case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2: |
| if (h != NULL) |
| { |
| if (h->got.refcount > 0) |
| h->got.refcount -= 1; |
| |
| if (h->type == STT_GNU_IFUNC) |
| { |
| if (h->plt.refcount > 0) |
| h->plt.refcount -= 1; |
| } |
| } |
| else if (locals != NULL) |
| { |
| if (locals[r_symndx].got_refcount > 0) |
| locals[r_symndx].got_refcount -= 1; |
| } |
| break; |
| |
| case BFD_RELOC_AARCH64_CALL26: |
| case BFD_RELOC_AARCH64_JUMP26: |
| /* If this is a local symbol then we resolve it |
| directly without creating a PLT entry. */ |
| if (h == NULL) |
| continue; |
| |
| if (h->plt.refcount > 0) |
| h->plt.refcount -= 1; |
| break; |
| |
| case BFD_RELOC_AARCH64_MOVW_G0_NC: |
| case BFD_RELOC_AARCH64_MOVW_G1_NC: |
| case BFD_RELOC_AARCH64_MOVW_G2_NC: |
| case BFD_RELOC_AARCH64_MOVW_G3: |
| case BFD_RELOC_AARCH64_ADR_HI21_NC_PCREL: |
| case BFD_RELOC_AARCH64_ADR_HI21_PCREL: |
| case BFD_RELOC_AARCH64_ADR_LO21_PCREL: |
| case BFD_RELOC_AARCH64_NN: |
| if (h != NULL && info->executable) |
| { |
| if (h->plt.refcount > 0) |
| h->plt.refcount -= 1; |
| } |
| break; |
| |
| default: |
| break; |
| } |
| } |
| |
| return TRUE; |
| } |
| |
| /* Adjust a symbol defined by a dynamic object and referenced by a |
| regular object. The current definition is in some section of the |
| dynamic object, but we're not including those sections. We have to |
| change the definition to something the rest of the link can |
| understand. */ |
| |
| static bfd_boolean |
| elfNN_aarch64_adjust_dynamic_symbol (struct bfd_link_info *info, |
| struct elf_link_hash_entry *h) |
| { |
| struct elf_aarch64_link_hash_table *htab; |
| asection *s; |
| |
| /* If this is a function, put it in the procedure linkage table. We |
| will fill in the contents of the procedure linkage table later, |
| when we know the address of the .got section. */ |
| if (h->type == STT_FUNC || h->type == STT_GNU_IFUNC || h->needs_plt) |
| { |
| if (h->plt.refcount <= 0 |
| || (h->type != STT_GNU_IFUNC |
| && (SYMBOL_CALLS_LOCAL (info, h) |
| || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT |
| && h->root.type == bfd_link_hash_undefweak)))) |
| { |
| /* This case can occur if we saw a CALL26 reloc in |
| an input file, but the symbol wasn't referred to |
| by a dynamic object or all references were |
| garbage collected. In which case we can end up |
| resolving. */ |
| h->plt.offset = (bfd_vma) - 1; |
| h->needs_plt = 0; |
| } |
| |
| return TRUE; |
| } |
| else |
| /* It's possible that we incorrectly decided a .plt reloc was |
| needed for an R_X86_64_PC32 reloc to a non-function sym in |
| check_relocs. We can't decide accurately between function and |
| non-function syms in check-relocs; Objects loaded later in |
| the link may change h->type. So fix it now. */ |
| h->plt.offset = (bfd_vma) - 1; |
| |
| |
| /* If this is a weak symbol, and there is a real definition, the |
| processor independent code will have arranged for us to see the |
| real definition first, and we can just use the same value. */ |
| if (h->u.weakdef != NULL) |
| { |
| BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined |
| || h->u.weakdef->root.type == bfd_link_hash_defweak); |
| h->root.u.def.section = h->u.weakdef->root.u.def.section; |
| h->root.u.def.value = h->u.weakdef->root.u.def.value; |
| if (ELIMINATE_COPY_RELOCS || info->nocopyreloc) |
| h->non_got_ref = h->u.weakdef->non_got_ref; |
| return TRUE; |
| } |
| |
| /* If we are creating a shared library, we must presume that the |
| only references to the symbol are via the global offset table. |
| For such cases we need not do anything here; the relocations will |
| be handled correctly by relocate_section. */ |
| if (info->shared) |
| return TRUE; |
| |
| /* If there are no references to this symbol that do not use the |
| GOT, we don't need to generate a copy reloc. */ |
| if (!h->non_got_ref) |
| return TRUE; |
| |
| /* If -z nocopyreloc was given, we won't generate them either. */ |
| if (info->nocopyreloc) |
| { |
| h->non_got_ref = 0; |
| return TRUE; |
| } |
| |
| /* We must allocate the symbol in our .dynbss section, which will |
| become part of the .bss section of the executable. There will be |
| an entry for this symbol in the .dynsym section. The dynamic |
| object will contain position independent code, so all references |
| from the dynamic object to this symbol will go through the global |
| offset table. The dynamic linker will use the .dynsym entry to |
| determine the address it must put in the global offset table, so |
| both the dynamic object and the regular object will refer to the |
| same memory location for the variable. */ |
| |
| htab = elf_aarch64_hash_table (info); |
| |
| /* We must generate a R_AARCH64_COPY reloc to tell the dynamic linker |
| to copy the initial value out of the dynamic object and into the |
| runtime process image. */ |
| if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0) |
| { |
| htab->srelbss->size += RELOC_SIZE (htab); |
| h->needs_copy = 1; |
| } |
| |
| s = htab->sdynbss; |
| |
| return _bfd_elf_adjust_dynamic_copy (h, s); |
| |
| } |
| |
| static bfd_boolean |
| elfNN_aarch64_allocate_local_symbols (bfd *abfd, unsigned number) |
| { |
| struct elf_aarch64_local_symbol *locals; |
| locals = elf_aarch64_locals (abfd); |
| if (locals == NULL) |
| { |
| locals = (struct elf_aarch64_local_symbol *) |
| bfd_zalloc (abfd, number * sizeof (struct elf_aarch64_local_symbol)); |
| if (locals == NULL) |
| return FALSE; |
| elf_aarch64_locals (abfd) = locals; |
| } |
| return TRUE; |
| } |
| |
| /* Create the .got section to hold the global offset table. */ |
| |
| static bfd_boolean |
| aarch64_elf_create_got_section (bfd *abfd, struct bfd_link_info *info) |
| { |
| const struct elf_backend_data *bed = get_elf_backend_data (abfd); |
| flagword flags; |
| asection *s; |
| struct elf_link_hash_entry *h; |
| struct elf_link_hash_table *htab = elf_hash_table (info); |
| |
| /* This function may be called more than once. */ |
| s = bfd_get_linker_section (abfd, ".got"); |
| if (s != NULL) |
| return TRUE; |
| |
| flags = bed->dynamic_sec_flags; |
| |
| s = bfd_make_section_anyway_with_flags (abfd, |
| (bed->rela_plts_and_copies_p |
| ? ".rela.got" : ".rel.got"), |
| (bed->dynamic_sec_flags |
| | SEC_READONLY)); |
| if (s == NULL |
| || ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align)) |
| return FALSE; |
| htab->srelgot = s; |
| |
| s = bfd_make_section_anyway_with_flags (abfd, ".got", flags); |
| if (s == NULL |
| || !bfd_set_section_alignment (abfd, s, bed->s->log_file_align)) |
| return FALSE; |
| htab->sgot = s; |
| htab->sgot->size += GOT_ENTRY_SIZE; |
| |
| if (bed->want_got_sym) |
| { |
| /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the .got |
| (or .got.plt) section. We don't do this in the linker script |
| because we don't want to define the symbol if we are not creating |
| a global offset table. */ |
| h = _bfd_elf_define_linkage_sym (abfd, info, s, |
| "_GLOBAL_OFFSET_TABLE_"); |
| elf_hash_table (info)->hgot = h; |
| if (h == NULL) |
| return FALSE; |
| } |
| |
| if (bed->want_got_plt) |
| { |
| s = bfd_make_section_anyway_with_flags (abfd, ".got.plt", flags); |
| if (s == NULL |
| || !bfd_set_section_alignment (abfd, s, |
| bed->s->log_file_align)) |
| return FALSE; |
| htab->sgotplt = s; |
| } |
| |
| /* The first bit of the global offset table is the header. */ |
| s->size += bed->got_header_size; |
| |
| return TRUE; |
| } |
| |
| /* Look through the relocs for a section during the first phase. */ |
| |
| static bfd_boolean |
| elfNN_aarch64_check_relocs (bfd *abfd, struct bfd_link_info *info, |
| asection *sec, const Elf_Internal_Rela *relocs) |
| { |
| Elf_Internal_Shdr *symtab_hdr; |
| struct elf_link_hash_entry **sym_hashes; |
| const Elf_Internal_Rela *rel; |
| const Elf_Internal_Rela *rel_end; |
| asection *sreloc; |
| |
| struct elf_aarch64_link_hash_table *htab; |
| |
| if (info->relocatable) |
| return TRUE; |
| |
| BFD_ASSERT (is_aarch64_elf (abfd)); |
| |
| htab = elf_aarch64_hash_table (info); |
| sreloc = NULL; |
| |
| symtab_hdr = &elf_symtab_hdr (abfd); |
| sym_hashes = elf_sym_hashes (abfd); |
| |
| rel_end = relocs + sec->reloc_count; |
| for (rel = relocs; rel < rel_end; rel++) |
| { |
| struct elf_link_hash_entry *h; |
| unsigned long r_symndx; |
| unsigned int r_type; |
| bfd_reloc_code_real_type bfd_r_type; |
| Elf_Internal_Sym *isym; |
| |
| r_symndx = ELFNN_R_SYM (rel->r_info); |
| r_type = ELFNN_R_TYPE (rel->r_info); |
| |
| if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr)) |
| { |
| (*_bfd_error_handler) (_("%B: bad symbol index: %d"), abfd, |
| r_symndx); |
| return FALSE; |
| } |
| |
| if (r_symndx < symtab_hdr->sh_info) |
| { |
| /* A local symbol. */ |
| isym = bfd_sym_from_r_symndx (&htab->sym_cache, |
| abfd, r_symndx); |
| if (isym == NULL) |
| return FALSE; |
| |
| /* Check relocation against local STT_GNU_IFUNC symbol. */ |
| if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) |
| { |
| h = elfNN_aarch64_get_local_sym_hash (htab, abfd, rel, |
| TRUE); |
| if (h == NULL) |
| return FALSE; |
| |
| /* Fake a STT_GNU_IFUNC symbol. */ |
| h->type = STT_GNU_IFUNC; |
| h->def_regular = 1; |
| h->ref_regular = 1; |
| h->forced_local = 1; |
| h->root.type = bfd_link_hash_defined; |
| } |
| else |
| h = NULL; |
| } |
| else |
| { |
| h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| while (h->root.type == bfd_link_hash_indirect |
| || h->root.type == bfd_link_hash_warning) |
| h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| |
| /* PR15323, ref flags aren't set for references in the same |
| object. */ |
| h->root.non_ir_ref = 1; |
| } |
| |
| /* Could be done earlier, if h were already available. */ |
| bfd_r_type = aarch64_tls_transition (abfd, info, r_type, h, r_symndx); |
| |
| if (h != NULL) |
| { |
| /* Create the ifunc sections for static executables. If we |
| never see an indirect function symbol nor we are building |
| a static executable, those sections will be empty and |
| won't appear in output. */ |
| switch (bfd_r_type) |
| { |
| default: |
| break; |
| |
| case BFD_RELOC_AARCH64_NN: |
| case BFD_RELOC_AARCH64_CALL26: |
| case BFD_RELOC_AARCH64_JUMP26: |
| case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC: |
| case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC: |
| case BFD_RELOC_AARCH64_ADR_GOT_PAGE: |
| case BFD_RELOC_AARCH64_GOT_LD_PREL19: |
| case BFD_RELOC_AARCH64_ADR_HI21_PCREL: |
| case BFD_RELOC_AARCH64_ADD_LO12: |
| if (htab->root.dynobj == NULL) |
| htab->root.dynobj = abfd; |
| if (!_bfd_elf_create_ifunc_sections (htab->root.dynobj, info)) |
| return FALSE; |
| break; |
| } |
| |
| /* It is referenced by a non-shared object. */ |
| h->ref_regular = 1; |
| h->root.non_ir_ref = 1; |
| } |
| |
| switch (bfd_r_type) |
| { |
| case BFD_RELOC_AARCH64_NN: |
| |
| /* We don't need to handle relocs into sections not going into |
| the "real" output. */ |
| if ((sec->flags & SEC_ALLOC) == 0) |
| break; |
| |
| if (h != NULL) |
| { |
| if (!info->shared) |
| h->non_got_ref = 1; |
| |
| h->plt.refcount += 1; |
| h->pointer_equality_needed = 1; |
| } |
| |
| /* No need to do anything if we're not creating a shared |
| object. */ |
| if (! info->shared) |
| break; |
| |
| { |
| struct elf_dyn_relocs *p; |
| struct elf_dyn_relocs **head; |
| |
| /* We must copy these reloc types into the output file. |
| Create a reloc section in dynobj and make room for |
| this reloc. */ |
| if (sreloc == NULL) |
| { |
| if (htab->root.dynobj == NULL) |
| htab->root.dynobj = abfd; |
| |
| sreloc = _bfd_elf_make_dynamic_reloc_section |
| (sec, htab->root.dynobj, LOG_FILE_ALIGN, abfd, /*rela? */ TRUE); |
| |
| if (sreloc == NULL) |
| return FALSE; |
| } |
| |
| /* If this is a global symbol, we count the number of |
| relocations we need for this symbol. */ |
| if (h != NULL) |
| { |
| struct elf_aarch64_link_hash_entry *eh; |
| eh = (struct elf_aarch64_link_hash_entry *) h; |
| head = &eh->dyn_relocs; |
| } |
| else |
| { |
| /* Track dynamic relocs needed for local syms too. |
| We really need local syms available to do this |
| easily. Oh well. */ |
| |
| asection *s; |
| void **vpp; |
| |
| isym = bfd_sym_from_r_symndx (&htab->sym_cache, |
| abfd, r_symndx); |
| if (isym == NULL) |
| return FALSE; |
| |
| s = bfd_section_from_elf_index (abfd, isym->st_shndx); |
| if (s == NULL) |
| s = sec; |
| |
| /* Beware of type punned pointers vs strict aliasing |
| rules. */ |
| vpp = &(elf_section_data (s)->local_dynrel); |
| head = (struct elf_dyn_relocs **) vpp; |
| } |
| |
| p = *head; |
| if (p == NULL || p->sec != sec) |
| { |
| bfd_size_type amt = sizeof *p; |
| p = ((struct elf_dyn_relocs *) |
| bfd_zalloc (htab->root.dynobj, amt)); |
| if (p == NULL) |
| return FALSE; |
| p->next = *head; |
| *head = p; |
| p->sec = sec; |
| } |
| |
| p->count += 1; |
| |
| } |
| break; |
| |
| /* RR: We probably want to keep a consistency check that |
| there are no dangling GOT_PAGE relocs. */ |
| case BFD_RELOC_AARCH64_ADR_GOT_PAGE: |
| case BFD_RELOC_AARCH64_GOT_LD_PREL19: |
| case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC: |
| case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC: |
| case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC: |
| case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21: |
| case BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC: |
| case BFD_RELOC_AARCH64_TLSDESC_LD64_LO12_NC: |
| case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC: |
| case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21: |
| case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21: |
| case BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC: |
| case BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC: |
| case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12: |
| case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12: |
| case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12_NC: |
| case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0: |
| case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC: |
| case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1: |
| case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC: |
| case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2: |
| { |
| unsigned got_type; |
| unsigned old_got_type; |
| |
| got_type = aarch64_reloc_got_type (bfd_r_type); |
| |
| if (h) |
| { |
| h->got.refcount += 1; |
| old_got_type = elf_aarch64_hash_entry (h)->got_type; |
| } |
| else |
| { |
| struct elf_aarch64_local_symbol *locals; |
| |
| if (!elfNN_aarch64_allocate_local_symbols |
| (abfd, symtab_hdr->sh_info)) |
| return FALSE; |
| |
| locals = elf_aarch64_locals (abfd); |
| BFD_ASSERT (r_symndx < symtab_hdr->sh_info); |
| locals[r_symndx].got_refcount += 1; |
| old_got_type = locals[r_symndx].got_type; |
| } |
| |
| /* If a variable is accessed with both general dynamic TLS |
| methods, two slots may be created. */ |
| if (GOT_TLS_GD_ANY_P (old_got_type) && GOT_TLS_GD_ANY_P (got_type)) |
| got_type |= old_got_type; |
| |
| /* We will already have issued an error message if there |
| is a TLS/non-TLS mismatch, based on the symbol type. |
| So just combine any TLS types needed. */ |
| if (old_got_type != GOT_UNKNOWN && old_got_type != GOT_NORMAL |
| && got_type != GOT_NORMAL) |
| got_type |= old_got_type; |
| |
| /* If the symbol is accessed by both IE and GD methods, we |
| are able to relax. Turn off the GD flag, without |
| messing up with any other kind of TLS types that may be |
| involved. */ |
| if ((got_type & GOT_TLS_IE) && GOT_TLS_GD_ANY_P (got_type)) |
| got_type &= ~ (GOT_TLSDESC_GD | GOT_TLS_GD); |
| |
| if (old_got_type != got_type) |
| { |
| if (h != NULL) |
| elf_aarch64_hash_entry (h)->got_type = got_type; |
| else |
| { |
| struct elf_aarch64_local_symbol *locals; |
| locals = elf_aarch64_locals (abfd); |
| BFD_ASSERT (r_symndx < symtab_hdr->sh_info); |
| locals[r_symndx].got_type = got_type; |
| } |
| } |
| |
| if (htab->root.dynobj == NULL) |
| htab->root.dynobj = abfd; |
| if (! aarch64_elf_create_got_section (htab->root.dynobj, info)) |
| return FALSE; |
| break; |
| } |
| |
| case BFD_RELOC_AARCH64_MOVW_G0_NC: |
| case BFD_RELOC_AARCH64_MOVW_G1_NC: |
| case BFD_RELOC_AARCH64_MOVW_G2_NC: |
| case BFD_RELOC_AARCH64_MOVW_G3: |
| if (info->shared) |
| { |
| int howto_index = bfd_r_type - BFD_RELOC_AARCH64_RELOC_START; |
| (*_bfd_error_handler) |
| (_("%B: relocation %s against `%s' can not be used when making " |
| "a shared object; recompile with -fPIC"), |
| abfd, elfNN_aarch64_howto_table[howto_index].name, |
| (h) ? h->root.root.string : "a local symbol"); |
| bfd_set_error (bfd_error_bad_value); |
| return FALSE; |
| } |
| |
| case BFD_RELOC_AARCH64_ADR_HI21_NC_PCREL: |
| case BFD_RELOC_AARCH64_ADR_HI21_PCREL: |
| case BFD_RELOC_AARCH64_ADR_LO21_PCREL: |
| if (h != NULL && info->executable) |
| { |
| /* If this reloc is in a read-only section, we might |
| need a copy reloc. We can't check reliably at this |
| stage whether the section is read-only, as input |
| sections have not yet been mapped to output sections. |
| Tentatively set the flag for now, and correct in |
| adjust_dynamic_symbol. */ |
| h->non_got_ref = 1; |
| h->plt.refcount += 1; |
| h->pointer_equality_needed = 1; |
| } |
| /* FIXME:: RR need to handle these in shared libraries |
| and essentially bomb out as these being non-PIC |
| relocations in shared libraries. */ |
| break; |
| |
| case BFD_RELOC_AARCH64_CALL26: |
| case BFD_RELOC_AARCH64_JUMP26: |
| /* If this is a local symbol then we resolve it |
| directly without creating a PLT entry. */ |
| if (h == NULL) |
| continue; |
| |
| h->needs_plt = 1; |
| if (h->plt.refcount <= 0) |
| h->plt.refcount = 1; |
| else |
| h->plt.refcount += 1; |
| break; |
| |
| default: |
| break; |
| } |
| } |
| |
| return TRUE; |
| } |
| |
| /* Treat mapping symbols as special target symbols. */ |
| |
| static bfd_boolean |
| elfNN_aarch64_is_target_special_symbol (bfd *abfd ATTRIBUTE_UNUSED, |
| asymbol *sym) |
| { |
| return bfd_is_aarch64_special_symbol_name (sym->name, |
| BFD_AARCH64_SPECIAL_SYM_TYPE_ANY); |
| } |
| |
| /* This is a copy of elf_find_function () from elf.c except that |
| AArch64 mapping symbols are ignored when looking for function names. */ |
| |
| static bfd_boolean |
| aarch64_elf_find_function (bfd *abfd ATTRIBUTE_UNUSED, |
| asymbol **symbols, |
| asection *section, |
| bfd_vma offset, |
| const char **filename_ptr, |
| const char **functionname_ptr) |
| { |
| const char *filename = NULL; |
| asymbol *func = NULL; |
| bfd_vma low_func = 0; |
| asymbol **p; |
| |
| for (p = symbols; *p != NULL; p++) |
| { |
| elf_symbol_type *q; |
| |
| q = (elf_symbol_type *) * p; |
| |
| switch (ELF_ST_TYPE (q->internal_elf_sym.st_info)) |
| { |
| default: |
| break; |
| case STT_FILE: |
| filename = bfd_asymbol_name (&q->symbol); |
| break; |
| case STT_FUNC: |
| case STT_NOTYPE: |
| /* Skip mapping symbols. */ |
| if ((q->symbol.flags & BSF_LOCAL) |
| && (bfd_is_aarch64_special_symbol_name |
| (q->symbol.name, BFD_AARCH64_SPECIAL_SYM_TYPE_ANY))) |
| continue; |
| /* Fall through. */ |
| if (bfd_get_section (&q->symbol) == section |
| && q->symbol.value >= low_func && q->symbol.value <= offset) |
| { |
| func = (asymbol *) q; |
| low_func = q->symbol.value; |
| } |
| break; |
| } |
| } |
| |
| if (func == NULL) |
| return FALSE; |
| |
| if (filename_ptr) |
| *filename_ptr = filename; |
| if (functionname_ptr) |
| *functionname_ptr = bfd_asymbol_name (func); |
| |
| return TRUE; |
| } |
| |
| |
| /* Find the nearest line to a particular section and offset, for error |
| reporting. This code is a duplicate of the code in elf.c, except |
| that it uses aarch64_elf_find_function. */ |
| |
| static bfd_boolean |
| elfNN_aarch64_find_nearest_line (bfd *abfd, |
| asymbol **symbols, |
| asection *section, |
| bfd_vma offset, |
| const char **filename_ptr, |
| const char **functionname_ptr, |
| unsigned int *line_ptr, |
| unsigned int *discriminator_ptr) |
| { |
| bfd_boolean found = FALSE; |
| |
| if (_bfd_dwarf2_find_nearest_line (abfd, symbols, NULL, section, offset, |
| filename_ptr, functionname_ptr, |
| line_ptr, discriminator_ptr, |
| dwarf_debug_sections, 0, |
| &elf_tdata (abfd)->dwarf2_find_line_info)) |
| { |
| if (!*functionname_ptr) |
| aarch64_elf_find_function (abfd, symbols, section, offset, |
| *filename_ptr ? NULL : filename_ptr, |
| functionname_ptr); |
| |
| return TRUE; |
| } |
| |
| /* Skip _bfd_dwarf1_find_nearest_line since no known AArch64 |
| toolchain uses DWARF1. */ |
| |
| if (!_bfd_stab_section_find_nearest_line (abfd, symbols, section, offset, |
| &found, filename_ptr, |
| functionname_ptr, line_ptr, |
| &elf_tdata (abfd)->line_info)) |
| return FALSE; |
| |
| if (found && (*functionname_ptr || *line_ptr)) |
| return TRUE; |
| |
| if (symbols == NULL) |
| return FALSE; |
| |
| if (!aarch64_elf_find_function (abfd, symbols, section, offset, |
| filename_ptr, functionname_ptr)) |
| return FALSE; |
| |
| *line_ptr = 0; |
| return TRUE; |
| } |
| |
| static bfd_boolean |
| elfNN_aarch64_find_inliner_info (bfd *abfd, |
| const char **filename_ptr, |
| const char **functionname_ptr, |
| unsigned int *line_ptr) |
| { |
| bfd_boolean found; |
| found = _bfd_dwarf2_find_inliner_info |
| (abfd, filename_ptr, |
| functionname_ptr, line_ptr, &elf_tdata (abfd)->dwarf2_find_line_info); |
| return found; |
| } |
| |
| |
| static void |
| elfNN_aarch64_post_process_headers (bfd *abfd, |
| struct bfd_link_info *link_info) |
| { |
| Elf_Internal_Ehdr *i_ehdrp; /* ELF file header, internal form. */ |
| |
| i_ehdrp = elf_elfheader (abfd); |
| i_ehdrp->e_ident[EI_ABIVERSION] = AARCH64_ELF_ABI_VERSION; |
| |
| _bfd_elf_post_process_headers (abfd, link_info); |
| } |
| |
| static enum elf_reloc_type_class |
| elfNN_aarch64_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED, |
| const asection *rel_sec ATTRIBUTE_UNUSED, |
| const Elf_Internal_Rela *rela) |
| { |
| switch ((int) ELFNN_R_TYPE (rela->r_info)) |
| { |
| case AARCH64_R (RELATIVE): |
| return reloc_class_relative; |
| case AARCH64_R (JUMP_SLOT): |
| return reloc_class_plt; |
| case AARCH64_R (COPY): |
| return reloc_class_copy; |
| default: |
| return reloc_class_normal; |
| } |
| } |
| |
| /* Handle an AArch64 specific section when reading an object file. This is |
| called when bfd_section_from_shdr finds a section with an unknown |
| type. */ |
| |
| static bfd_boolean |
| elfNN_aarch64_section_from_shdr (bfd *abfd, |
| Elf_Internal_Shdr *hdr, |
| const char *name, int shindex) |
| { |
| /* There ought to be a place to keep ELF backend specific flags, but |
| at the moment there isn't one. We just keep track of the |
| sections by their name, instead. Fortunately, the ABI gives |
| names for all the AArch64 specific sections, so we will probably get |
| away with this. */ |
| switch (hdr->sh_type) |
| { |
| case SHT_AARCH64_ATTRIBUTES: |
| break; |
| |
| default: |
| return FALSE; |
| } |
| |
| if (!_bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex)) |
| return FALSE; |
| |
| return TRUE; |
| } |
| |
| /* A structure used to record a list of sections, independently |
| of the next and prev fields in the asection structure. */ |
| typedef struct section_list |
| { |
| asection *sec; |
| struct section_list *next; |
| struct section_list *prev; |
| } |
| section_list; |
| |
| /* Unfortunately we need to keep a list of sections for which |
| an _aarch64_elf_section_data structure has been allocated. This |
| is because it is possible for functions like elfNN_aarch64_write_section |
| to be called on a section which has had an elf_data_structure |
| allocated for it (and so the used_by_bfd field is valid) but |
| for which the AArch64 extended version of this structure - the |
| _aarch64_elf_section_data structure - has not been allocated. */ |
| static section_list *sections_with_aarch64_elf_section_data = NULL; |
| |
| static void |
| record_section_with_aarch64_elf_section_data (asection *sec) |
| { |
| struct section_list *entry; |
| |
| entry = bfd_malloc (sizeof (*entry)); |
| if (entry == NULL) |
| return; |
| entry->sec = sec; |
| entry->next = sections_with_aarch64_elf_section_data; |
| entry->prev = NULL; |
| if (entry->next != NULL) |
| entry->next->prev = entry; |
| sections_with_aarch64_elf_section_data = entry; |
| } |
| |
| static struct section_list * |
| find_aarch64_elf_section_entry (asection *sec) |
| { |
| struct section_list *entry; |
| static struct section_list *last_entry = NULL; |
| |
| /* This is a short cut for the typical case where the sections are added |
| to the sections_with_aarch64_elf_section_data list in forward order and |
| then looked up here in backwards order. This makes a real difference |
| to the ld-srec/sec64k.exp linker test. */ |
| entry = sections_with_aarch64_elf_section_data; |
| if (last_entry != NULL) |
| { |
| if (last_entry->sec == sec) |
| entry = last_entry; |
| else if (last_entry->next != NULL && last_entry->next->sec == sec) |
| entry = last_entry->next; |
| } |
| |
| for (; entry; entry = entry->next) |
| if (entry->sec == sec) |
| break; |
| |
| if (entry) |
| /* Record the entry prior to this one - it is the entry we are |
| most likely to want to locate next time. Also this way if we |
| have been called from |
| unrecord_section_with_aarch64_elf_section_data () we will not |
| be caching a pointer that is about to be freed. */ |
| last_entry = entry->prev; |
| |
| return entry; |
| } |
| |
| static void |
| unrecord_section_with_aarch64_elf_section_data (asection *sec) |
| { |
| struct section_list *entry; |
| |
| entry = find_aarch64_elf_section_entry (sec); |
| |
| if (entry) |
| { |
| if (entry->prev != NULL) |
| entry->prev->next = entry->next; |
| if (entry->next != NULL) |
| entry->next->prev = entry->prev; |
| if (entry == sections_with_aarch64_elf_section_data) |
| sections_with_aarch64_elf_section_data = entry->next; |
| free (entry); |
| } |
| } |
| |
| |
| typedef struct |
| { |
| void *finfo; |
| struct bfd_link_info *info; |
| asection *sec; |
| int sec_shndx; |
| int (*func) (void *, const char *, Elf_Internal_Sym *, |
| asection *, struct elf_link_hash_entry *); |
| } output_arch_syminfo; |
| |
| enum map_symbol_type |
| { |
| AARCH64_MAP_INSN, |
| AARCH64_MAP_DATA |
| }; |
| |
| |
| /* Output a single mapping symbol. */ |
| |
| static bfd_boolean |
| elfNN_aarch64_output_map_sym (output_arch_syminfo *osi, |
| enum map_symbol_type type, bfd_vma offset) |
| { |
| static const char *names[2] = { "$x", "$d" }; |
| Elf_Internal_Sym sym; |
| |
| sym.st_value = (osi->sec->output_section->vma |
| + osi->sec->output_offset + offset); |
| sym.st_size = 0; |
| sym.st_other = 0; |
| sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_NOTYPE); |
| sym.st_shndx = osi->sec_shndx; |
| return osi->func (osi->finfo, names[type], &sym, osi->sec, NULL) == 1; |
| } |
| |
| |
| |
| /* Output mapping symbols for PLT entries associated with H. */ |
| |
| static bfd_boolean |
| elfNN_aarch64_output_plt_map (struct elf_link_hash_entry *h, void *inf) |
| { |
| output_arch_syminfo *osi = (output_arch_syminfo *) inf; |
| bfd_vma addr; |
| |
| if (h->root.type == bfd_link_hash_indirect) |
| return TRUE; |
| |
| if (h->root.type == bfd_link_hash_warning) |
| /* When warning symbols are created, they **replace** the "real" |
| entry in the hash table, thus we never get to see the real |
| symbol in a hash traversal. So look at it now. */ |
| h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| |
| if (h->plt.offset == (bfd_vma) - 1) |
| return TRUE; |
| |
| addr = h->plt.offset; |
| if (addr == 32) |
| { |
| if (!elfNN_aarch64_output_map_sym (osi, AARCH64_MAP_INSN, addr)) |
| return FALSE; |
| } |
| return TRUE; |
| } |
| |
| |
| /* Output a single local symbol for a generated stub. */ |
| |
| static bfd_boolean |
| elfNN_aarch64_output_stub_sym (output_arch_syminfo *osi, const char *name, |
| bfd_vma offset, bfd_vma size) |
| { |
| Elf_Internal_Sym sym; |
| |
| sym.st_value = (osi->sec->output_section->vma |
| + osi->sec->output_offset + offset); |
| sym.st_size = size; |
| sym.st_other = 0; |
| sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FUNC); |
| sym.st_shndx = osi->sec_shndx; |
| return osi->func (osi->finfo, name, &sym, osi->sec, NULL) == 1; |
| } |
| |
| static bfd_boolean |
| aarch64_map_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg) |
| { |
| struct elf_aarch64_stub_hash_entry *stub_entry; |
| asection *stub_sec; |
| bfd_vma addr; |
| char *stub_name; |
| output_arch_syminfo *osi; |
| |
| /* Massage our args to the form they really have. */ |
| stub_entry = (struct elf_aarch64_stub_hash_entry *) gen_entry; |
| osi = (output_arch_syminfo *) in_arg; |
| |
| stub_sec = stub_entry->stub_sec; |
| |
| /* Ensure this stub is attached to the current section being |
| processed. */ |
| if (stub_sec != osi->sec) |
| return TRUE; |
| |
| addr = (bfd_vma) stub_entry->stub_offset; |
| |
| stub_name = stub_entry->output_name; |
| |
| switch (stub_entry->stub_type) |
| { |
| case aarch64_stub_adrp_branch: |
| if (!elfNN_aarch64_output_stub_sym (osi, stub_name, addr, |
| sizeof (aarch64_adrp_branch_stub))) |
| return FALSE; |
| if (!elfNN_aarch64_output_map_sym (osi, AARCH64_MAP_INSN, addr)) |
| return FALSE; |
| break; |
| case aarch64_stub_long_branch: |
| if (!elfNN_aarch64_output_stub_sym |
| (osi, stub_name, addr, sizeof (aarch64_long_branch_stub))) |
| return FALSE; |
| if (!elfNN_aarch64_output_map_sym (osi, AARCH64_MAP_INSN, addr)) |
| return FALSE; |
| if (!elfNN_aarch64_output_map_sym (osi, AARCH64_MAP_DATA, addr + 16)) |
| return FALSE; |
| break; |
| case aarch64_stub_erratum_835769_veneer: |
| if (!elfNN_aarch64_output_stub_sym (osi, stub_name, addr, |
| sizeof (aarch64_erratum_835769_stub))) |
| return FALSE; |
| if (!elfNN_aarch64_output_map_sym (osi, AARCH64_MAP_INSN, addr)) |
| return FALSE; |
| break; |
| case aarch64_stub_erratum_843419_veneer: |
| if (!elfNN_aarch64_output_stub_sym (osi, stub_name, addr, |
| sizeof (aarch64_erratum_843419_stub))) |
| return FALSE; |
| if (!elfNN_aarch64_output_map_sym (osi, AARCH64_MAP_INSN, addr)) |
| return FALSE; |
| break; |
| |
| default: |
| BFD_FAIL (); |
| } |
| |
| return TRUE; |
| } |
| |
| /* Output mapping symbols for linker generated sections. */ |
| |
| static bfd_boolean |
| elfNN_aarch64_output_arch_local_syms (bfd *output_bfd, |
| struct bfd_link_info *info, |
| void *finfo, |
| int (*func) (void *, const char *, |
| Elf_Internal_Sym *, |
| asection *, |
| struct elf_link_hash_entry |
| *)) |
| { |
| output_arch_syminfo osi; |
| struct elf_aarch64_link_hash_table *htab; |
| |
| htab = elf_aarch64_hash_table (info); |
| |
| osi.finfo = finfo; |
| osi.info = info; |
| osi.func = func; |
| |
| /* Long calls stubs. */ |
| if (htab->stub_bfd && htab->stub_bfd->sections) |
| { |
| asection *stub_sec; |
| |
| for (stub_sec = htab->stub_bfd->sections; |
| stub_sec != NULL; stub_sec = stub_sec->next) |
| { |
| /* Ignore non-stub sections. */ |
| if (!strstr (stub_sec->name, STUB_SUFFIX)) |
| continue; |
| |
| osi.sec = stub_sec; |
| |
| osi.sec_shndx = _bfd_elf_section_from_bfd_section |
| (output_bfd, osi.sec->output_section); |
| |
| /* The first instruction in a stub is always a branch. */ |
| if (!elfNN_aarch64_output_map_sym (&osi, AARCH64_MAP_INSN, 0)) |
| return FALSE; |
| |
| bfd_hash_traverse (&htab->stub_hash_table, aarch64_map_one_stub, |
| &osi); |
| } |
| } |
| |
| /* Finally, output mapping symbols for the PLT. */ |
| if (!htab->root.splt || htab->root.splt->size == 0) |
| return TRUE; |
| |
| /* For now live without mapping symbols for the plt. */ |
| osi.sec_shndx = _bfd_elf_section_from_bfd_section |
| (output_bfd, htab->root.splt->output_section); |
| osi.sec = htab->root.splt; |
| |
| elf_link_hash_traverse (&htab->root, elfNN_aarch64_output_plt_map, |
| (void *) &osi); |
| |
| return TRUE; |
| |
| } |
| |
| /* Allocate target specific section data. */ |
| |
| static bfd_boolean |
| elfNN_aarch64_new_section_hook (bfd *abfd, asection *sec) |
| { |
| if (!sec->used_by_bfd) |
| { |
| _aarch64_elf_section_data *sdata; |
| bfd_size_type amt = sizeof (*sdata); |
| |
| sdata = bfd_zalloc (abfd, amt); |
| if (sdata == NULL) |
| return FALSE; |
| sec->used_by_bfd = sdata; |
| } |
| |
| record_section_with_aarch64_elf_section_data (sec); |
| |
| return _bfd_elf_new_section_hook (abfd, sec); |
| } |
| |
| |
| static void |
| unrecord_section_via_map_over_sections (bfd *abfd ATTRIBUTE_UNUSED, |
| asection *sec, |
| void *ignore ATTRIBUTE_UNUSED) |
| { |
| unrecord_section_with_aarch64_elf_section_data (sec); |
| } |
| |
| static bfd_boolean |
| elfNN_aarch64_close_and_cleanup (bfd *abfd) |
| { |
| if (abfd->sections) |
| bfd_map_over_sections (abfd, |
| unrecord_section_via_map_over_sections, NULL); |
| |
| return _bfd_elf_close_and_cleanup (abfd); |
| } |
| |
| static bfd_boolean |
| elfNN_aarch64_bfd_free_cached_info (bfd *abfd) |
| { |
| if (abfd->sections) |
| bfd_map_over_sections (abfd, |
| unrecord_section_via_map_over_sections, NULL); |
| |
| return _bfd_free_cached_info (abfd); |
| } |
| |
| /* Create dynamic sections. This is different from the ARM backend in that |
| the got, plt, gotplt and their relocation sections are all created in the |
| standard part of the bfd elf backend. */ |
| |
| static bfd_boolean |
| elfNN_aarch64_create_dynamic_sections (bfd *dynobj, |
| struct bfd_link_info *info) |
| { |
| struct elf_aarch64_link_hash_table *htab; |
| |
| /* We need to create .got section. */ |
| if (!aarch64_elf_create_got_section (dynobj, info)) |
| return FALSE; |
| |
| if (!_bfd_elf_create_dynamic_sections (dynobj, info)) |
| return FALSE; |
| |
| htab = elf_aarch64_hash_table (info); |
| htab->sdynbss = bfd_get_linker_section (dynobj, ".dynbss"); |
| if (!info->shared) |
| htab->srelbss = bfd_get_linker_section (dynobj, ".rela.bss"); |
| |
| if (!htab->sdynbss || (!info->shared && !htab->srelbss)) |
| abort (); |
| |
| return TRUE; |
| } |
| |
| |
| /* Allocate space in .plt, .got and associated reloc sections for |
| dynamic relocs. */ |
| |
| static bfd_boolean |
| elfNN_aarch64_allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf) |
| { |
| struct bfd_link_info *info; |
| struct elf_aarch64_link_hash_table *htab; |
| struct elf_aarch64_link_hash_entry *eh; |
| struct elf_dyn_relocs *p; |
| |
| /* An example of a bfd_link_hash_indirect symbol is versioned |
| symbol. For example: __gxx_personality_v0(bfd_link_hash_indirect) |
| -> __gxx_personality_v0(bfd_link_hash_defined) |
| |
| There is no need to process bfd_link_hash_indirect symbols here |
| because we will also be presented with the concrete instance of |
| the symbol and elfNN_aarch64_copy_indirect_symbol () will have been |
| called to copy all relevant data from the generic to the concrete |
| symbol instance. |
| */ |
| if (h->root.type == bfd_link_hash_indirect) |
| return TRUE; |
| |
| if (h->root.type == bfd_link_hash_warning) |
| h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| |
| info = (struct bfd_link_info *) inf; |
| htab = elf_aarch64_hash_table (info); |
| |
| /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it |
| here if it is defined and referenced in a non-shared object. */ |
| if (h->type == STT_GNU_IFUNC |
| && h->def_regular) |
| return TRUE; |
| else if (htab->root.dynamic_sections_created && h->plt.refcount > 0) |
| { |
| /* Make sure this symbol is output as a dynamic symbol. |
| Undefined weak syms won't yet be marked as dynamic. */ |
| if (h->dynindx == -1 && !h->forced_local) |
| { |
| if (!bfd_elf_link_record_dynamic_symbol (info, h)) |
| return FALSE; |
| } |
| |
| if (info->shared || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h)) |
| { |
| asection *s = htab->root.splt; |
| |
| /* If this is the first .plt entry, make room for the special |
| first entry. */ |
| if (s->size == 0) |
| s->size += htab->plt_header_size; |
| |
| h->plt.offset = s->size; |
| |
| /* If this symbol is not defined in a regular file, and we are |
| not generating a shared library, then set the symbol to this |
| location in the .plt. This is required to make function |
| pointers compare as equal between the normal executable and |
| the shared library. */ |
| if (!info->shared && !h->def_regular) |
| { |
| h->root.u.def.section = s; |
| h->root.u.def.value = h->plt.offset; |
| } |
| |
| /* Make room for this entry. For now we only create the |
| small model PLT entries. We later need to find a way |
| of relaxing into these from the large model PLT entries. */ |
| s->size += PLT_SMALL_ENTRY_SIZE; |
| |
| /* We also need to make an entry in the .got.plt section, which |
| will be placed in the .got section by the linker script. */ |
| htab->root.sgotplt->size += GOT_ENTRY_SIZE; |
| |
| /* We also need to make an entry in the .rela.plt section. */ |
| htab->root.srelplt->size += RELOC_SIZE (htab); |
| |
| /* We need to ensure that all GOT entries that serve the PLT |
| are consecutive with the special GOT slots [0] [1] and |
| [2]. Any addtional relocations, such as |
| R_AARCH64_TLSDESC, must be placed after the PLT related |
| entries. We abuse the reloc_count such that during |
| sizing we adjust reloc_count to indicate the number of |
| PLT related reserved entries. In subsequent phases when |
| filling in the contents of the reloc entries, PLT related |
| entries are placed by computing their PLT index (0 |
| .. reloc_count). While other none PLT relocs are placed |
| at the slot indicated by reloc_count and reloc_count is |
| updated. */ |
| |
| htab->root.srelplt->reloc_count++; |
| } |
| else |
| { |
| h->plt.offset = (bfd_vma) - 1; |
| h->needs_plt = 0; |
| } |
| } |
| else |
| { |
| h->plt.offset = (bfd_vma) - 1; |
| h->needs_plt = 0; |
| } |
| |
| eh = (struct elf_aarch64_link_hash_entry *) h; |
| eh->tlsdesc_got_jump_table_offset = (bfd_vma) - 1; |
| |
| if (h->got.refcount > 0) |
| { |
| bfd_boolean dyn; |
| unsigned got_type = elf_aarch64_hash_entry (h)->got_type; |
| |
| h->got.offset = (bfd_vma) - 1; |
| |
| dyn = htab->root.dynamic_sections_created; |
| |
| /* Make sure this symbol is output as a dynamic symbol. |
| Undefined weak syms won't yet be marked as dynamic. */ |
| if (dyn && h->dynindx == -1 && !h->forced_local) |
| { |
| if (!bfd_elf_link_record_dynamic_symbol (info, h)) |
| return FALSE; |
| } |
| |
| if (got_type == GOT_UNKNOWN) |
| { |
| } |
| else if (got_type == GOT_NORMAL) |
| { |
| h->got.offset = htab->root.sgot->size; |
| htab->root.sgot->size += GOT_ENTRY_SIZE; |
| if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
| || h->root.type != bfd_link_hash_undefweak) |
| && (info->shared |
| || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))) |
| { |
| htab->root.srelgot->size += RELOC_SIZE (htab); |
| } |
| } |
| else |
| { |
| int indx; |
| if (got_type & GOT_TLSDESC_GD) |
| { |
| eh->tlsdesc_got_jump_table_offset = |
| (htab->root.sgotplt->size |
| - aarch64_compute_jump_table_size (htab)); |
| htab->root.sgotplt->size += GOT_ENTRY_SIZE * 2; |
| h->got.offset = (bfd_vma) - 2; |
| } |
| |
| if (got_type & GOT_TLS_GD) |
| { |
| h->got.offset = htab->root.sgot->size; |
| htab->root.sgot->size += GOT_ENTRY_SIZE * 2; |
| } |
| |
| if (got_type & GOT_TLS_IE) |
| { |
| h->got.offset = htab->root.sgot->size; |
| htab->root.sgot->size += GOT_ENTRY_SIZE; |
| } |
| |
| indx = h && h->dynindx != -1 ? h->dynindx : 0; |
| if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
| || h->root.type != bfd_link_hash_undefweak) |
| && (info->shared |
| || indx != 0 |
| || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))) |
| { |
| if (got_type & GOT_TLSDESC_GD) |
| { |
| htab->root.srelplt->size += RELOC_SIZE (htab); |
| /* Note reloc_count not incremented here! We have |
| already adjusted reloc_count for this relocation |
| type. */ |
| |
| /* TLSDESC PLT is now needed, but not yet determined. */ |
| htab->tlsdesc_plt = (bfd_vma) - 1; |
| } |
| |
| if (got_type & GOT_TLS_GD) |
| htab->root.srelgot->size += RELOC_SIZE (htab) * 2; |
| |
| if (got_type & GOT_TLS_IE) |
| htab->root.srelgot->size += RELOC_SIZE (htab); |
| } |
| } |
| } |
| else |
| { |
| h->got.offset = (bfd_vma) - 1; |
| } |
| |
| if (eh->dyn_relocs == NULL) |
| return TRUE; |
| |
| /* In the shared -Bsymbolic case, discard space allocated for |
| dynamic pc-relative relocs against symbols which turn out to be |
| defined in regular objects. For the normal shared case, discard |
| space for pc-relative relocs that have become local due to symbol |
| visibility changes. */ |
| |
| if (info->shared) |
| { |
| /* Relocs that use pc_count are those that appear on a call |
| insn, or certain REL relocs that can generated via assembly. |
| We want calls to protected symbols to resolve directly to the |
| function rather than going via the plt. If people want |
| function pointer comparisons to work as expected then they |
| should avoid writing weird assembly. */ |
| if (SYMBOL_CALLS_LOCAL (info, h)) |
| { |
| struct elf_dyn_relocs **pp; |
| |
| for (pp = &eh->dyn_relocs; (p = *pp) != NULL;) |
| { |
| p->count -= p->pc_count; |
| p->pc_count = 0; |
| if (p->count == 0) |
| *pp = p->next; |
| else |
| pp = &p->next; |
| } |
| } |
| |
| /* Also discard relocs on undefined weak syms with non-default |
| visibility. */ |
| if (eh->dyn_relocs != NULL && h->root.type == bfd_link_hash_undefweak) |
| { |
| if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) |
| eh->dyn_relocs = NULL; |
| |
| /* Make sure undefined weak symbols are output as a dynamic |
| symbol in PIEs. */ |
| else if (h->dynindx == -1 |
| && !h->forced_local |
| && !bfd_elf_link_record_dynamic_symbol (info, h)) |
| return FALSE; |
| } |
| |
| } |
| else if (ELIMINATE_COPY_RELOCS) |
| { |
| /* For the non-shared case, discard space for relocs against |
| symbols which turn out to need copy relocs or are not |
| dynamic. */ |
| |
| if (!h->non_got_ref |
| && ((h->def_dynamic |
| && !h->def_regular) |
| || (htab->root.dynamic_sections_created |
| && (h->root.type == bfd_link_hash_undefweak |
| || h->root.type == bfd_link_hash_undefined)))) |
| { |
| /* Make sure this symbol is output as a dynamic symbol. |
| Undefined weak syms won't yet be marked as dynamic. */ |
| if (h->dynindx == -1 |
| && !h->forced_local |
| && !bfd_elf_link_record_dynamic_symbol (info, h)) |
| return FALSE; |
| |
| /* If that succeeded, we know we'll be keeping all the |
| relocs. */ |
| if (h->dynindx != -1) |
| goto keep; |
| } |
| |
| eh->dyn_relocs = NULL; |
| |
| keep:; |
| } |
| |
| /* Finally, allocate space. */ |
| for (p = eh->dyn_relocs; p != NULL; p = p->next) |
| { |
| asection *sreloc; |
| |
| sreloc = elf_section_data (p->sec)->sreloc; |
| |
| BFD_ASSERT (sreloc != NULL); |
| |
| sreloc->size += p->count * RELOC_SIZE (htab); |
| } |
| |
| return TRUE; |
| } |
| |
| /* Allocate space in .plt, .got and associated reloc sections for |
| ifunc dynamic relocs. */ |
| |
| static bfd_boolean |
| elfNN_aarch64_allocate_ifunc_dynrelocs (struct elf_link_hash_entry *h, |
| void *inf) |
| { |
| struct bfd_link_info *info; |
| struct elf_aarch64_link_hash_table *htab; |
| struct elf_aarch64_link_hash_entry *eh; |
| |
| /* An example of a bfd_link_hash_indirect symbol is versioned |
| symbol. For example: __gxx_personality_v0(bfd_link_hash_indirect) |
| -> __gxx_personality_v0(bfd_link_hash_defined) |
| |
| There is no need to process bfd_link_hash_indirect symbols here |
| because we will also be presented with the concrete instance of |
| the symbol and elfNN_aarch64_copy_indirect_symbol () will have been |
| called to copy all relevant data from the generic to the concrete |
| symbol instance. |
| */ |
| if (h->root.type == bfd_link_hash_indirect) |
| return TRUE; |
| |
| if (h->root.type == bfd_link_hash_warning) |
| h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| |
| info = (struct bfd_link_info *) inf; |
| htab = elf_aarch64_hash_table (info); |
| |
| eh = (struct elf_aarch64_link_hash_entry *) h; |
| |
| /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it |
| here if it is defined and referenced in a non-shared object. */ |
| if (h->type == STT_GNU_IFUNC |
| && h->def_regular) |
| return _bfd_elf_allocate_ifunc_dyn_relocs (info, h, |
| &eh->dyn_relocs, |
| htab->plt_entry_size, |
| htab->plt_header_size, |
| GOT_ENTRY_SIZE); |
| return TRUE; |
| } |
| |
| /* Allocate space in .plt, .got and associated reloc sections for |
| local dynamic relocs. */ |
| |
| static bfd_boolean |
| elfNN_aarch64_allocate_local_dynrelocs (void **slot, void *inf) |
| { |
| struct elf_link_hash_entry *h |
| = (struct elf_link_hash_entry *) *slot; |
| |
| if (h->type != STT_GNU_IFUNC |
| || !h->def_regular |
| || !h->ref_regular |
| || !h->forced_local |
| || h->root.type != bfd_link_hash_defined) |
| abort (); |
| |
| return elfNN_aarch64_allocate_dynrelocs (h, inf); |
| } |
| |
| /* Allocate space in .plt, .got and associated reloc sections for |
| local ifunc dynamic relocs. */ |
| |
| static bfd_boolean |
| elfNN_aarch64_allocate_local_ifunc_dynrelocs (void **slot, void *inf) |
| { |
| struct elf_link_hash_entry *h |
| = (struct elf_link_hash_entry *) *slot; |
| |
| if (h->type != STT_GNU_IFUNC |
| || !h->def_regular |
| || !h->ref_regular |
| || !h->forced_local |
| || h->root.type != bfd_link_hash_defined) |
| abort (); |
| |
| return elfNN_aarch64_allocate_ifunc_dynrelocs (h, inf); |
| } |
| |
| /* This is the most important function of all . Innocuosly named |
| though ! */ |
| static bfd_boolean |
| elfNN_aarch64_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED, |
| struct bfd_link_info *info) |
| { |
| struct elf_aarch64_link_hash_table *htab; |
| bfd *dynobj; |
| asection *s; |
| bfd_boolean relocs; |
| bfd *ibfd; |
| |
| htab = elf_aarch64_hash_table ((info)); |
| dynobj = htab->root.dynobj; |
| |
| BFD_ASSERT (dynobj != NULL); |
| |
| if (htab->root.dynamic_sections_created) |
| { |
| if (info->executable) |
| { |
| s = bfd_get_linker_section (dynobj, ".interp"); |
| if (s == NULL) |
| abort (); |
| s->size = sizeof ELF_DYNAMIC_INTERPRETER; |
| s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; |
| } |
| } |
| |
| /* Set up .got offsets for local syms, and space for local dynamic |
| relocs. */ |
| for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
| { |
| struct elf_aarch64_local_symbol *locals = NULL; |
| Elf_Internal_Shdr *symtab_hdr; |
| asection *srel; |
| unsigned int i; |
| |
| if (!is_aarch64_elf (ibfd)) |
| continue; |
| |
| for (s = ibfd->sections; s != NULL; s = s->next) |
| { |
| struct elf_dyn_relocs *p; |
| |
| for (p = (struct elf_dyn_relocs *) |
| (elf_section_data (s)->local_dynrel); p != NULL; p = p->next) |
| { |
| if (!bfd_is_abs_section (p->sec) |
| && bfd_is_abs_section (p->sec->output_section)) |
| { |
| /* Input section has been discarded, either because |
| it is a copy of a linkonce section or due to |
| linker script /DISCARD/, so we'll be discarding |
| the relocs too. */ |
| } |
| else if (p->count != 0) |
| { |
| srel = elf_section_data (p->sec)->sreloc; |
| srel->size += p->count * RELOC_SIZE (htab); |
| if ((p->sec->output_section->flags & SEC_READONLY) != 0) |
| info->flags |= DF_TEXTREL; |
| } |
| } |
| } |
| |
| locals = elf_aarch64_locals (ibfd); |
| if (!locals) |
| continue; |
| |
| symtab_hdr = &elf_symtab_hdr (ibfd); |
| srel = htab->root.srelgot; |
| for (i = 0; i < symtab_hdr->sh_info; i++) |
| { |
| locals[i].got_offset = (bfd_vma) - 1; |
| locals[i].tlsdesc_got_jump_table_offset = (bfd_vma) - 1; |
| if (locals[i].got_refcount > 0) |
| { |
| unsigned got_type = locals[i].got_type; |
| if (got_type & GOT_TLSDESC_GD) |
| { |
| locals[i].tlsdesc_got_jump_table_offset = |
| (htab->root.sgotplt->size |
| - aarch64_compute_jump_table_size (htab)); |
| htab->root.sgotplt->size += GOT_ENTRY_SIZE * 2; |
| locals[i].got_offset = (bfd_vma) - 2; |
| } |
| |
| if (got_type & GOT_TLS_GD) |
| { |
| locals[i].got_offset = htab->root.sgot->size; |
| htab->root.sgot->size += GOT_ENTRY_SIZE * 2; |
| } |
| |
| if (got_type & GOT_TLS_IE) |
| { |
| locals[i].got_offset = htab->root.sgot->size; |
| htab->root.sgot->size += GOT_ENTRY_SIZE; |
| } |
| |
| if (got_type == GOT_UNKNOWN) |
| { |
| } |
| |
| if (got_type == GOT_NORMAL) |
| { |
| } |
| |
| if (info->shared) |
| { |
| if (got_type & GOT_TLSDESC_GD) |
| { |
| htab->root.srelplt->size += RELOC_SIZE (htab); |
| /* Note RELOC_COUNT not incremented here! */ |
| htab->tlsdesc_plt = (bfd_vma) - 1; |
| } |
| |
| if (got_type & GOT_TLS_GD) |
| htab->root.srelgot->size += RELOC_SIZE (htab) * 2; |
| |
| if (got_type & GOT_TLS_IE) |
| htab->root.srelgot->size += RELOC_SIZE (htab); |
| } |
| } |
| else |
| { |
| locals[i].got_refcount = (bfd_vma) - 1; |
| } |
| } |
| } |
| |
| |
| /* Allocate global sym .plt and .got entries, and space for global |
| sym dynamic relocs. */ |
| elf_link_hash_traverse (&htab->root, elfNN_aarch64_allocate_dynrelocs, |
| info); |
| |
| /* Allocate global ifunc sym .plt and .got entries, and space for global |
| ifunc sym dynamic relocs. */ |
| elf_link_hash_traverse (&htab->root, elfNN_aarch64_allocate_ifunc_dynrelocs, |
| info); |
| |
| /* Allocate .plt and .got entries, and space for local symbols. */ |
| htab_traverse (htab->loc_hash_table, |
| elfNN_aarch64_allocate_local_dynrelocs, |
| info); |
| |
| /* Allocate .plt and .got entries, and space for local ifunc symbols. */ |
| htab_traverse (htab->loc_hash_table, |
| elfNN_aarch64_allocate_local_ifunc_dynrelocs, |
| info); |
| |
| /* For every jump slot reserved in the sgotplt, reloc_count is |
| incremented. However, when we reserve space for TLS descriptors, |
| it's not incremented, so in order to compute the space reserved |
| for them, it suffices to multiply the reloc count by the jump |
| slot size. */ |
| |
| if (htab->root.srelplt) |
| htab->sgotplt_jump_table_size = aarch64_compute_jump_table_size (htab); |
| |
| if (htab->tlsdesc_plt) |
| { |
| if (htab->root.splt->size == 0) |
| htab->root.splt->size += PLT_ENTRY_SIZE; |
| |
| htab->tlsdesc_plt = htab->root.splt->size; |
| htab->root.splt->size += PLT_TLSDESC_ENTRY_SIZE; |
| |
| /* If we're not using lazy TLS relocations, don't generate the |
| GOT entry required. */ |
| if (!(info->flags & DF_BIND_NOW)) |
| { |
| htab->dt_tlsdesc_got = htab->root.sgot->size; |
| htab->root.sgot->size += GOT_ENTRY_SIZE; |
| } |
| } |
| |
| /* Init mapping symbols information to use later to distingush between |
| code and data while scanning for errata. */ |
| if (htab->fix_erratum_835769 || htab->fix_erratum_843419) |
| for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
| { |
| if (!is_aarch64_elf (ibfd)) |
| continue; |
| bfd_elfNN_aarch64_init_maps (ibfd); |
| } |
| |
| /* We now have determined the sizes of the various dynamic sections. |
| Allocate memory for them. */ |
| relocs = FALSE; |
| for (s = dynobj->sections; s != NULL; s = s->next) |
| { |
| if ((s->flags & SEC_LINKER_CREATED) == 0) |
| continue; |
| |
| if (s == htab->root.splt |
| || s == htab->root.sgot |
| || s == htab->root.sgotplt |
| || s == htab->root.iplt |
| || s == htab->root.igotplt || s == htab->sdynbss) |
| { |
| /* Strip this section if we don't need it; see the |
| comment below. */ |
| } |
| else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela")) |
| { |
| if (s->size != 0 && s != htab->root.srelplt) |
| relocs = TRUE; |
| |
| /* We use the reloc_count field as a counter if we need |
| to copy relocs into the output file. */ |
| if (s != htab->root.srelplt) |
| s->reloc_count = 0; |
| } |
| else |
| { |
| /* It's not one of our sections, so don't allocate space. */ |
| continue; |
| } |
| |
| if (s->size == 0) |
| { |
| /* If we don't need this section, strip it from the |
| output file. This is mostly to handle .rela.bss and |
| .rela.plt. We must create both sections in |
| create_dynamic_sections, because they must be created |
| before the linker maps input sections to output |
| sections. The linker does that before |
| adjust_dynamic_symbol is called, and it is that |
| function which decides whether anything needs to go |
| into these sections. */ |
| |
| s->flags |= SEC_EXCLUDE; |
| continue; |
| } |
| |
| if ((s->flags & SEC_HAS_CONTENTS) == 0) |
| continue; |
| |
| /* Allocate memory for the section contents. We use bfd_zalloc |
| here in case unused entries are not reclaimed before the |
| section's contents are written out. This should not happen, |
| but this way if it does, we get a R_AARCH64_NONE reloc instead |
| of garbage. */ |
| s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); |
| if (s->contents == NULL) |
| return FALSE; |
| } |
| |
| if (htab->root.dynamic_sections_created) |
| { |
| /* Add some entries to the .dynamic section. We fill in the |
| values later, in elfNN_aarch64_finish_dynamic_sections, but we |
| must add the entries now so that we get the correct size for |
| the .dynamic section. The DT_DEBUG entry is filled in by the |
| dynamic linker and used by the debugger. */ |
| #define add_dynamic_entry(TAG, VAL) \ |
| _bfd_elf_add_dynamic_entry (info, TAG, VAL) |
| |
| if (info->executable) |
| { |
| if (!add_dynamic_entry (DT_DEBUG, 0)) |
| return FALSE; |
| } |
| |
| if (htab->root.splt->size != 0) |
| { |
| if (!add_dynamic_entry (DT_PLTGOT, 0) |
| || !add_dynamic_entry (DT_PLTRELSZ, 0) |
| || !add_dynamic_entry (DT_PLTREL, DT_RELA) |
| || !add_dynamic_entry (DT_JMPREL, 0)) |
| return FALSE; |
| |
| if (htab->tlsdesc_plt |
| && (!add_dynamic_entry (DT_TLSDESC_PLT, 0) |
| || !add_dynamic_entry (DT_TLSDESC_GOT, 0))) |
| return FALSE; |
| } |
| |
| if (relocs) |
| { |
| if (!add_dynamic_entry (DT_RELA, 0) |
| || !add_dynamic_entry (DT_RELASZ, 0) |
| || !add_dynamic_entry (DT_RELAENT, RELOC_SIZE (htab))) |
| return FALSE; |
| |
| /* If any dynamic relocs apply to a read-only section, |
| then we need a DT_TEXTREL entry. */ |
| if ((info->flags & DF_TEXTREL) != 0) |
| { |
| if (!add_dynamic_entry (DT_TEXTREL, 0)) |
| return FALSE; |
| } |
| } |
| } |
| #undef add_dynamic_entry |
| |
| return TRUE; |
| } |
| |
| static inline void |
| elf_aarch64_update_plt_entry (bfd *output_bfd, |
| bfd_reloc_code_real_type r_type, |
| bfd_byte *plt_entry, bfd_vma value) |
| { |
| reloc_howto_type *howto = elfNN_aarch64_howto_from_bfd_reloc (r_type); |
| |
| _bfd_aarch64_elf_put_addend (output_bfd, plt_entry, r_type, howto, value); |
| } |
| |
| static void |
| elfNN_aarch64_create_small_pltn_entry (struct elf_link_hash_entry *h, |
| struct elf_aarch64_link_hash_table |
| *htab, bfd *output_bfd, |
| struct bfd_link_info *info) |
| { |
| bfd_byte *plt_entry; |
| bfd_vma plt_index; |
| bfd_vma got_offset; |
| bfd_vma gotplt_entry_address; |
| bfd_vma plt_entry_address; |
| Elf_Internal_Rela rela; |
| bfd_byte *loc; |
| asection *plt, *gotplt, *relplt; |
| |
| /* When building a static executable, use .iplt, .igot.plt and |
| .rela.iplt sections for STT_GNU_IFUNC symbols. */ |
| if (htab->root.splt != NULL) |
| { |
| plt = htab->root.splt; |
| gotplt = htab->root.sgotplt; |
| relplt = htab->root.srelplt; |
| } |
| else |
| { |
| plt = htab->root.iplt; |
| gotplt = htab->root.igotplt; |
| relplt = htab->root.irelplt; |
| } |
| |
| /* Get the index in the procedure linkage table which |
| corresponds to this symbol. This is the index of this symbol |
| in all the symbols for which we are making plt entries. The |
| first entry in the procedure linkage table is reserved. |
| |
| Get the offset into the .got table of the entry that |
| corresponds to this function. Each .got entry is GOT_ENTRY_SIZE |
| bytes. The first three are reserved for the dynamic linker. |
| |
| For static executables, we don't reserve anything. */ |
| |
| if (plt == htab->root.splt) |
| { |
| plt_index = (h->plt.offset - htab->plt_header_size) / htab->plt_entry_size; |
| got_offset = (plt_index + 3) * GOT_ENTRY_SIZE; |
| } |
| else |
| { |
| plt_index = h->plt.offset / htab->plt_entry_size; |
| got_offset = plt_index * GOT_ENTRY_SIZE; |
| } |
| |
| plt_entry = plt->contents + h->plt.offset; |
| plt_entry_address = plt->output_section->vma |
| + plt->output_offset + h->plt.offset; |
| gotplt_entry_address = gotplt->output_section->vma + |
| gotplt->output_offset + got_offset; |
| |
| /* Copy in the boiler-plate for the PLTn entry. */ |
| memcpy (plt_entry, elfNN_aarch64_small_plt_entry, PLT_SMALL_ENTRY_SIZE); |
| |
| /* Fill in the top 21 bits for this: ADRP x16, PLT_GOT + n * 8. |
| ADRP: ((PG(S+A)-PG(P)) >> 12) & 0x1fffff */ |
| elf_aarch64_update_plt_entry (output_bfd, BFD_RELOC_AARCH64_ADR_HI21_PCREL, |
| plt_entry, |
| PG (gotplt_entry_address) - |
| PG (plt_entry_address)); |
| |
| /* Fill in the lo12 bits for the load from the pltgot. */ |
| elf_aarch64_update_plt_entry (output_bfd, BFD_RELOC_AARCH64_LDSTNN_LO12, |
| plt_entry + 4, |
| PG_OFFSET (gotplt_entry_address)); |
| |
| /* Fill in the lo12 bits for the add from the pltgot entry. */ |
| elf_aarch64_update_plt_entry (output_bfd, BFD_RELOC_AARCH64_ADD_LO12, |
| plt_entry + 8, |
| PG_OFFSET (gotplt_entry_address)); |
| |
| /* All the GOTPLT Entries are essentially initialized to PLT0. */ |
| bfd_put_NN (output_bfd, |
| plt->output_section->vma + plt->output_offset, |
| gotplt->contents + got_offset); |
| |
| rela.r_offset = gotplt_entry_address; |
| |
| if (h->dynindx == -1 |
| || ((info->executable |
| || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) |
| && h->def_regular |
| && h->type == STT_GNU_IFUNC)) |
| { |
| /* If an STT_GNU_IFUNC symbol is locally defined, generate |
| R_AARCH64_IRELATIVE instead of R_AARCH64_JUMP_SLOT. */ |
| rela.r_info = ELFNN_R_INFO (0, AARCH64_R (IRELATIVE)); |
| rela.r_addend = (h->root.u.def.value |
| + h->root.u.def.section->output_section->vma |
| + h->root.u.def.section->output_offset); |
| } |
| else |
| { |
| /* Fill in the entry in the .rela.plt section. */ |
| rela.r_info = ELFNN_R_INFO (h->dynindx, AARCH64_R (JUMP_SLOT)); |
| rela.r_addend = 0; |
| } |
| |
| /* Compute the relocation entry to used based on PLT index and do |
| not adjust reloc_count. The reloc_count has already been adjusted |
| to account for this entry. */ |
| loc = relplt->contents + plt_index * RELOC_SIZE (htab); |
| bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc); |
| } |
| |
| /* Size sections even though they're not dynamic. We use it to setup |
| _TLS_MODULE_BASE_, if needed. */ |
| |
| static bfd_boolean |
| elfNN_aarch64_always_size_sections (bfd *output_bfd, |
| struct bfd_link_info *info) |
| { |
| asection *tls_sec; |
| |
| if (info->relocatable) |
| return TRUE; |
| |
| tls_sec = elf_hash_table (info)->tls_sec; |
| |
| if (tls_sec) |
| { |
| struct elf_link_hash_entry *tlsbase; |
| |
| tlsbase = elf_link_hash_lookup (elf_hash_table (info), |
| "_TLS_MODULE_BASE_", TRUE, TRUE, FALSE); |
| |
| if (tlsbase) |
| { |
| struct bfd_link_hash_entry *h = NULL; |
| const struct elf_backend_data *bed = |
| get_elf_backend_data (output_bfd); |
| |
| if (!(_bfd_generic_link_add_one_symbol |
| (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL, |
| tls_sec, 0, NULL, FALSE, bed->collect, &h))) |
| return FALSE; |
| |
| tlsbase->type = STT_TLS; |
| tlsbase = (struct elf_link_hash_entry *) h; |
| tlsbase->def_regular = 1; |
| tlsbase->other = STV_HIDDEN; |
| (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE); |
| } |
| } |
| |
| return TRUE; |
| } |
| |
| /* Finish up dynamic symbol handling. We set the contents of various |
| dynamic sections here. */ |
| static bfd_boolean |
| elfNN_aarch64_finish_dynamic_symbol (bfd *output_bfd, |
| struct bfd_link_info *info, |
| struct elf_link_hash_entry *h, |
| Elf_Internal_Sym *sym) |
| { |
| struct elf_aarch64_link_hash_table *htab; |
| htab = elf_aarch64_hash_table (info); |
| |
| if (h->plt.offset != (bfd_vma) - 1) |
| { |
| asection *plt, *gotplt, *relplt; |
| |
| /* This symbol has an entry in the procedure linkage table. Set |
| it up. */ |
| |
| /* When building a static executable, use .iplt, .igot.plt and |
| .rela.iplt sections for STT_GNU_IFUNC symbols. */ |
| if (htab->root.splt != NULL) |
| { |
| plt = htab->root.splt; |
| gotplt = htab->root.sgotplt; |
| relplt = htab->root.srelplt; |
| } |
| else |
| { |
| plt = htab->root.iplt; |
| gotplt = htab->root.igotplt; |
| relplt = htab->root.irelplt; |
| } |
| |
| /* This symbol has an entry in the procedure linkage table. Set |
| it up. */ |
| if ((h->dynindx == -1 |
| && !((h->forced_local || info->executable) |
| && h->def_regular |
| && h->type == STT_GNU_IFUNC)) |
| || plt == NULL |
| || gotplt == NULL |
| || relplt == NULL) |
| abort (); |
| |
| elfNN_aarch64_create_small_pltn_entry (h, htab, output_bfd, info); |
| if (!h->def_regular) |
| { |
| /* Mark the symbol as undefined, rather than as defined in |
| the .plt section. Leave the value alone. This is a clue |
| for the dynamic linker, to make function pointer |
| comparisons work between an application and shared |
| library. */ |
| sym->st_shndx = SHN_UNDEF; |
| } |
| } |
| |
| if (h->got.offset != (bfd_vma) - 1 |
| && elf_aarch64_hash_entry (h)->got_type == GOT_NORMAL) |
| { |
| Elf_Internal_Rela rela; |
| bfd_byte *loc; |
| |
| /* This symbol has an entry in the global offset table. Set it |
| up. */ |
| if (htab->root.sgot == NULL || htab->root.srelgot == NULL) |
| abort (); |
| |
| rela.r_offset = (htab->root.sgot->output_section->vma |
| + htab->root.sgot->output_offset |
| + (h->got.offset & ~(bfd_vma) 1)); |
| |
| if (h->def_regular |
| && h->type == STT_GNU_IFUNC) |
| { |
| if (info->shared) |
| { |
| /* Generate R_AARCH64_GLOB_DAT. */ |
| goto do_glob_dat; |
| } |
| else |
| { |
| asection *plt; |
| |
| if (!h->pointer_equality_needed) |
| abort (); |
| |
| /* For non-shared object, we can't use .got.plt, which |
| contains the real function address if we need pointer |
| equality. We load the GOT entry with the PLT entry. */ |
| plt = htab->root.splt ? htab->root.splt : htab->root.iplt; |
| bfd_put_NN (output_bfd, (plt->output_section->vma |
| + plt->output_offset |
| + h->plt.offset), |
| htab->root.sgot->contents |
| + (h->got.offset & ~(bfd_vma) 1)); |
| return TRUE; |
| } |
| } |
| else if (info->shared && SYMBOL_REFERENCES_LOCAL (info, h)) |
| { |
| if (!h->def_regular) |
| return FALSE; |
| |
| BFD_ASSERT ((h->got.offset & 1) != 0); |
| rela.r_info = ELFNN_R_INFO (0, AARCH64_R (RELATIVE)); |
| rela.r_addend = (h->root.u.def.value |
| + h->root.u.def.section->output_section->vma |
| + h->root.u.def.section->output_offset); |
| } |
| else |
| { |
| do_glob_dat: |
| BFD_ASSERT ((h->got.offset & 1) == 0); |
| bfd_put_NN (output_bfd, (bfd_vma) 0, |
| htab->root.sgot->contents + h->got.offset); |
| rela.r_info = ELFNN_R_INFO (h->dynindx, AARCH64_R (GLOB_DAT)); |
| rela.r_addend = 0; |
| } |
| |
| loc = htab->root.srelgot->contents; |
| loc += htab->root.srelgot->reloc_count++ * RELOC_SIZE (htab); |
| bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc); |
| } |
| |
| if (h->needs_copy) |
| { |
| Elf_Internal_Rela rela; |
| bfd_byte *loc; |
| |
| /* This symbol needs a copy reloc. Set it up. */ |
| |
| if (h->dynindx == -1 |
| || (h->root.type != bfd_link_hash_defined |
| && h->root.type != bfd_link_hash_defweak) |
| || htab->srelbss == NULL) |
| abort (); |
| |
| rela.r_offset = (h->root.u.def.value |
| + h->root.u.def.section->output_section->vma |
| + h->root.u.def.section->output_offset); |
| rela.r_info = ELFNN_R_INFO (h->dynindx, AARCH64_R (COPY)); |
| rela.r_addend = 0; |
| loc = htab->srelbss->contents; |
| loc += htab->srelbss->reloc_count++ * RELOC_SIZE (htab); |
| bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc); |
| } |
| |
| /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. SYM may |
| be NULL for local symbols. */ |
| if (sym != NULL |
| && (h == elf_hash_table (info)->hdynamic |
| || h == elf_hash_table (info)->hgot)) |
| sym->st_shndx = SHN_ABS; |
| |
| return TRUE; |
| } |
| |
| /* Finish up local dynamic symbol handling. We set the contents of |
| various dynamic sections here. */ |
| |
| static bfd_boolean |
| elfNN_aarch64_finish_local_dynamic_symbol (void **slot, void *inf) |
| { |
| struct elf_link_hash_entry *h |
| = (struct elf_link_hash_entry *) *slot; |
| struct bfd_link_info *info |
| = (struct bfd_link_info *) inf; |
| |
| return elfNN_aarch64_finish_dynamic_symbol (info->output_bfd, |
| info, h, NULL); |
| } |
| |
| static void |
| elfNN_aarch64_init_small_plt0_entry (bfd *output_bfd ATTRIBUTE_UNUSED, |
| struct elf_aarch64_link_hash_table |
| *htab) |
| { |
| /* Fill in PLT0. Fixme:RR Note this doesn't distinguish between |
| small and large plts and at the minute just generates |
| the small PLT. */ |
| |
| /* PLT0 of the small PLT looks like this in ELF64 - |
| stp x16, x30, [sp, #-16]! // Save the reloc and lr on stack. |
| adrp x16, PLT_GOT + 16 // Get the page base of the GOTPLT |
| ldr x17, [x16, #:lo12:PLT_GOT+16] // Load the address of the |
| // symbol resolver |
| add x16, x16, #:lo12:PLT_GOT+16 // Load the lo12 bits of the |
| // GOTPLT entry for this. |
| br x17 |
| PLT0 will be slightly different in ELF32 due to different got entry |
| size. |
| */ |
| bfd_vma plt_got_2nd_ent; /* Address of GOT[2]. */ |
| bfd_vma plt_base; |
| |
| |
| memcpy (htab->root.splt->contents, elfNN_aarch64_small_plt0_entry, |
| PLT_ENTRY_SIZE); |
| elf_section_data (htab->root.splt->output_section)->this_hdr.sh_entsize = |
| PLT_ENTRY_SIZE; |
| |
| plt_got_2nd_ent = (htab->root.sgotplt->output_section->vma |
| + htab->root.sgotplt->output_offset |
| + GOT_ENTRY_SIZE * 2); |
| |
| plt_base = htab->root.splt->output_section->vma + |
| htab->root.splt->output_offset; |
| |
| /* Fill in the top 21 bits for this: ADRP x16, PLT_GOT + n * 8. |
| ADRP: ((PG(S+A)-PG(P)) >> 12) & 0x1fffff */ |
| elf_aarch64_update_plt_entry (output_bfd, BFD_RELOC_AARCH64_ADR_HI21_PCREL, |
| htab->root.splt->contents + 4, |
| PG (plt_got_2nd_ent) - PG (plt_base + 4)); |
| |
| elf_aarch64_update_plt_entry (output_bfd, BFD_RELOC_AARCH64_LDSTNN_LO12, |
| htab->root.splt->contents + 8, |
| PG_OFFSET (plt_got_2nd_ent)); |
| |
| elf_aarch64_update_plt_entry (output_bfd, BFD_RELOC_AARCH64_ADD_LO12, |
| htab->root.splt->contents + 12, |
| PG_OFFSET (plt_got_2nd_ent)); |
| } |
| |
| static bfd_boolean |
| elfNN_aarch64_finish_dynamic_sections (bfd *output_bfd, |
| struct bfd_link_info *info) |
| { |
| struct elf_aarch64_link_hash_table *htab; |
| bfd *dynobj; |
| asection *sdyn; |
| |
| htab = elf_aarch64_hash_table (info); |
| dynobj = htab->root.dynobj; |
| sdyn = bfd_get_linker_section (dynobj, ".dynamic"); |
| |
| if (htab->root.dynamic_sections_created) |
| { |
| ElfNN_External_Dyn *dyncon, *dynconend; |
| |
| if (sdyn == NULL || htab->root.sgot == NULL) |
| abort (); |
| |
| dyncon = (ElfNN_External_Dyn *) sdyn->contents; |
| dynconend = (ElfNN_External_Dyn *) (sdyn->contents + sdyn->size); |
| for (; dyncon < dynconend; dyncon++) |
| { |
| Elf_Internal_Dyn dyn; |
| asection *s; |
| |
| bfd_elfNN_swap_dyn_in (dynobj, dyncon, &dyn); |
| |
| switch (dyn.d_tag) |
| { |
| default: |
| continue; |
| |
| case DT_PLTGOT: |
| s = htab->root.sgotplt; |
| dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; |
| break; |
| |
| case DT_JMPREL: |
| dyn.d_un.d_ptr = htab->root.srelplt->output_section->vma; |
| break; |
| |
| case DT_PLTRELSZ: |
| s = htab->root.srelplt; |
| dyn.d_un.d_val = s->size; |
| break; |
| |
| case DT_RELASZ: |
| /* The procedure linkage table relocs (DT_JMPREL) should |
| not be included in the overall relocs (DT_RELA). |
| Therefore, we override the DT_RELASZ entry here to |
| make it not include the JMPREL relocs. Since the |
| linker script arranges for .rela.plt to follow all |
| other relocation sections, we don't have to worry |
| about changing the DT_RELA entry. */ |
| if (htab->root.srelplt != NULL) |
| { |
| s = htab->root.srelplt; |
| dyn.d_un.d_val -= s->size; |
| } |
| break; |
| |
| case DT_TLSDESC_PLT: |
| s = htab->root.splt; |
| dyn.d_un.d_ptr = s->output_section->vma + s->output_offset |
| + htab->tlsdesc_plt; |
| break; |
| |
| case DT_TLSDESC_GOT: |
| s = htab->root.sgot; |
| dyn.d_un.d_ptr = s->output_section->vma + s->output_offset |
| + htab->dt_tlsdesc_got; |
| break; |
| } |
| |
| bfd_elfNN_swap_dyn_out (output_bfd, &dyn, dyncon); |
| } |
| |
| } |
| |
| /* Fill in the special first entry in the procedure linkage table. */ |
| if (htab->root.splt && htab->root.splt->size > 0) |
| { |
| elfNN_aarch64_init_small_plt0_entry (output_bfd, htab); |
| |
| elf_section_data (htab->root.splt->output_section)-> |
| this_hdr.sh_entsize = htab->plt_entry_size; |
| |
| |
| if (htab->tlsdesc_plt) |
| { |
| bfd_put_NN (output_bfd, (bfd_vma) 0, |
| htab->root.sgot->contents + htab->dt_tlsdesc_got); |
| |
| memcpy (htab->root.splt->contents + htab->tlsdesc_plt, |
| elfNN_aarch64_tlsdesc_small_plt_entry, |
| sizeof (elfNN_aarch64_tlsdesc_small_plt_entry)); |
| |
| { |
| bfd_vma adrp1_addr = |
| htab->root.splt->output_section->vma |
| + htab->root.splt->output_offset + htab->tlsdesc_plt + 4; |
| |
| bfd_vma adrp2_addr = adrp1_addr + 4; |
| |
| bfd_vma got_addr = |
| htab->root.sgot->output_section->vma |
| + htab->root.sgot->output_offset; |
| |
| bfd_vma pltgot_addr = |
| htab->root.sgotplt->output_section->vma |
| + htab->root.sgotplt->output_offset; |
| |
| bfd_vma dt_tlsdesc_got = got_addr + htab->dt_tlsdesc_got; |
| |
| bfd_byte *plt_entry = |
| htab->root.splt->contents + htab->tlsdesc_plt; |
| |
| /* adrp x2, DT_TLSDESC_GOT */ |
| elf_aarch64_update_plt_entry (output_bfd, |
| BFD_RELOC_AARCH64_ADR_HI21_PCREL, |
| plt_entry + 4, |
| (PG (dt_tlsdesc_got) |
| - PG (adrp1_addr))); |
| |
| /* adrp x3, 0 */ |
| elf_aarch64_update_plt_entry (output_bfd, |
| BFD_RELOC_AARCH64_ADR_HI21_PCREL, |
| plt_entry + 8, |
| (PG (pltgot_addr) |
| - PG (adrp2_addr))); |
| |
| /* ldr x2, [x2, #0] */ |
| elf_aarch64_update_plt_entry (output_bfd, |
| BFD_RELOC_AARCH64_LDSTNN_LO12, |
| plt_entry + 12, |
| PG_OFFSET (dt_tlsdesc_got)); |
| |
| /* add x3, x3, 0 */ |
| elf_aarch64_update_plt_entry (output_bfd, |
| BFD_RELOC_AARCH64_ADD_LO12, |
| plt_entry + 16, |
| PG_OFFSET (pltgot_addr)); |
| } |
| } |
| } |
| |
| if (htab->root.sgotplt) |
| { |
| if (bfd_is_abs_section (htab->root.sgotplt->output_section)) |
| { |
| (*_bfd_error_handler) |
| (_("discarded output section: `%A'"), htab->root.sgotplt); |
| return FALSE; |
| } |
| |
| /* Fill in the first three entries in the global offset table. */ |
| if (htab->root.sgotplt->size > 0) |
| { |
| bfd_put_NN (output_bfd, (bfd_vma) 0, htab->root.sgotplt->contents); |
| |
| /* Write GOT[1] and GOT[2], needed for the dynamic linker. */ |
| bfd_put_NN (output_bfd, |
| (bfd_vma) 0, |
| htab->root.sgotplt->contents + GOT_ENTRY_SIZE); |
| bfd_put_NN (output_bfd, |
| (bfd_vma) 0, |
| htab->root.sgotplt->contents + GOT_ENTRY_SIZE * 2); |
| } |
| |
| if (htab->root.sgot) |
| { |
| if (htab->root.sgot->size > 0) |
| { |
| bfd_vma addr = |
| sdyn ? sdyn->output_section->vma + sdyn->output_offset : 0; |
| bfd_put_NN (output_bfd, addr, htab->root.sgot->contents); |
| } |
| } |
| |
| elf_section_data (htab->root.sgotplt->output_section)-> |
| this_hdr.sh_entsize = GOT_ENTRY_SIZE; |
| } |
| |
| if (htab->root.sgot && htab->root.sgot->size > 0) |
| elf_section_data (htab->root.sgot->output_section)->this_hdr.sh_entsize |
| = GOT_ENTRY_SIZE; |
| |
| /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */ |
| htab_traverse (htab->loc_hash_table, |
| elfNN_aarch64_finish_local_dynamic_symbol, |
| info); |
| |
| return TRUE; |
| } |
| |
| /* Return address for Ith PLT stub in section PLT, for relocation REL |
| or (bfd_vma) -1 if it should not be included. */ |
| |
| static bfd_vma |
| elfNN_aarch64_plt_sym_val (bfd_vma i, const asection *plt, |
| const arelent *rel ATTRIBUTE_UNUSED) |
| { |
| return plt->vma + PLT_ENTRY_SIZE + i * PLT_SMALL_ENTRY_SIZE; |
| } |
| |
| |
| /* We use this so we can override certain functions |
| (though currently we don't). */ |
| |
| const struct elf_size_info elfNN_aarch64_size_info = |
| { |
| sizeof (ElfNN_External_Ehdr), |
| sizeof (ElfNN_External_Phdr), |
| sizeof (ElfNN_External_Shdr), |
| sizeof (ElfNN_External_Rel), |
| sizeof (ElfNN_External_Rela), |
| sizeof (ElfNN_External_Sym), |
| sizeof (ElfNN_External_Dyn), |
| sizeof (Elf_External_Note), |
| 4, /* Hash table entry size. */ |
| 1, /* Internal relocs per external relocs. */ |
| ARCH_SIZE, /* Arch size. */ |
| LOG_FILE_ALIGN, /* Log_file_align. */ |
| ELFCLASSNN, EV_CURRENT, |
| bfd_elfNN_write_out_phdrs, |
| bfd_elfNN_write_shdrs_and_ehdr, |
| bfd_elfNN_checksum_contents, |
| bfd_elfNN_write_relocs, |
| bfd_elfNN_swap_symbol_in, |
| bfd_elfNN_swap_symbol_out, |
| bfd_elfNN_slurp_reloc_table, |
| bfd_elfNN_slurp_symbol_table, |
| bfd_elfNN_swap_dyn_in, |
| bfd_elfNN_swap_dyn_out, |
| bfd_elfNN_swap_reloc_in, |
| bfd_elfNN_swap_reloc_out, |
| bfd_elfNN_swap_reloca_in, |
| bfd_elfNN_swap_reloca_out |
| }; |
| |
| #define ELF_ARCH bfd_arch_aarch64 |
| #define ELF_MACHINE_CODE EM_AARCH64 |
| #define ELF_MAXPAGESIZE 0x10000 |
| #define ELF_MINPAGESIZE 0x1000 |
| #define ELF_COMMONPAGESIZE 0x1000 |
| |
| #define bfd_elfNN_close_and_cleanup \ |
| elfNN_aarch64_close_and_cleanup |
| |
| #define bfd_elfNN_bfd_free_cached_info \ |
| elfNN_aarch64_bfd_free_cached_info |
| |
| #define bfd_elfNN_bfd_is_target_special_symbol \ |
| elfNN_aarch64_is_target_special_symbol |
| |
| #define bfd_elfNN_bfd_link_hash_table_create \ |
| elfNN_aarch64_link_hash_table_create |
| |
| #define bfd_elfNN_bfd_merge_private_bfd_data \ |
| elfNN_aarch64_merge_private_bfd_data |
| |
| #define bfd_elfNN_bfd_print_private_bfd_data \ |
| elfNN_aarch64_print_private_bfd_data |
| |
| #define bfd_elfNN_bfd_reloc_type_lookup \ |
| elfNN_aarch64_reloc_type_lookup |
| |
| #define bfd_elfNN_bfd_reloc_name_lookup \ |
| elfNN_aarch64_reloc_name_lookup |
| |
| #define bfd_elfNN_bfd_set_private_flags \ |
| elfNN_aarch64_set_private_flags |
| |
| #define bfd_elfNN_find_inliner_info \ |
| elfNN_aarch64_find_inliner_info |
| |
| #define bfd_elfNN_find_nearest_line \ |
| elfNN_aarch64_find_nearest_line |
| |
| #define bfd_elfNN_mkobject \ |
| elfNN_aarch64_mkobject |
| |
| #define bfd_elfNN_new_section_hook \ |
| elfNN_aarch64_new_section_hook |
| |
| #define elf_backend_adjust_dynamic_symbol \ |
| elfNN_aarch64_adjust_dynamic_symbol |
| |
| #define elf_backend_always_size_sections \ |
| elfNN_aarch64_always_size_sections |
| |
| #define elf_backend_check_relocs \ |
| elfNN_aarch64_check_relocs |
| |
| #define elf_backend_copy_indirect_symbol \ |
| elfNN_aarch64_copy_indirect_symbol |
| |
| /* Create .dynbss, and .rela.bss sections in DYNOBJ, and set up shortcuts |
| to them in our hash. */ |
| #define elf_backend_create_dynamic_sections \ |
| elfNN_aarch64_create_dynamic_sections |
| |
| #define elf_backend_init_index_section \ |
| _bfd_elf_init_2_index_sections |
| |
| #define elf_backend_finish_dynamic_sections \ |
| elfNN_aarch64_finish_dynamic_sections |
| |
| #define elf_backend_finish_dynamic_symbol \ |
| elfNN_aarch64_finish_dynamic_symbol |
| |
| #define elf_backend_gc_sweep_hook \ |
| elfNN_aarch64_gc_sweep_hook |
| |
| #define elf_backend_object_p \ |
| elfNN_aarch64_object_p |
| |
| #define elf_backend_output_arch_local_syms \ |
| elfNN_aarch64_output_arch_local_syms |
| |
| #define elf_backend_plt_sym_val \ |
| elfNN_aarch64_plt_sym_val |
| |
| #define elf_backend_post_process_headers \ |
| elfNN_aarch64_post_process_headers |
| |
| #define elf_backend_relocate_section \ |
| elfNN_aarch64_relocate_section |
| |
| #define elf_backend_reloc_type_class \ |
| elfNN_aarch64_reloc_type_class |
| |
| #define elf_backend_section_from_shdr \ |
| elfNN_aarch64_section_from_shdr |
| |
| #define elf_backend_size_dynamic_sections \ |
| elfNN_aarch64_size_dynamic_sections |
| |
| #define elf_backend_size_info \ |
| elfNN_aarch64_size_info |
| |
| #define elf_backend_write_section \ |
| elfNN_aarch64_write_section |
| |
| #define elf_backend_can_refcount 1 |
| #define elf_backend_can_gc_sections 1 |
| #define elf_backend_plt_readonly 1 |
| #define elf_backend_want_got_plt 1 |
| #define elf_backend_want_plt_sym 0 |
| #define elf_backend_may_use_rel_p 0 |
| #define elf_backend_may_use_rela_p 1 |
| #define elf_backend_default_use_rela_p 1 |
| #define elf_backend_rela_normal 1 |
| #define elf_backend_got_header_size (GOT_ENTRY_SIZE * 3) |
| #define elf_backend_default_execstack 0 |
| |
| #undef elf_backend_obj_attrs_section |
| #define elf_backend_obj_attrs_section ".ARM.attributes" |
| |
| #include "elfNN-target.h" |