| /* Target definitions for GCC for NativeClient using ELF |
| Copyright (C) 1988, 1991, 1995, 2000, 2001, 2002 |
| Free Software Foundation, Inc. |
| |
| Derived from sysv4.h written by Ron Guilmette (rfg@netcom.com). |
| |
| This file is part of GCC. |
| |
| GCC 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 2, or (at your option) |
| any later version. |
| |
| GCC 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 GCC; see the file COPYING. If not, write to |
| the Free Software Foundation, 59 Temple Place - Suite 330, |
| Boston, MA 02111-1307, USA. */ |
| |
| #define TARGET_NACL (flag_control_integrity) |
| |
| /* ??? Blah -- this macro is used directly by libobjc. Since it |
| supports no vector modes, cut out the complexity and fall back |
| on BIGGEST_FIELD_ALIGNMENT. NaCl uses x86-64 style alignment |
| in IA32 mode so we must redefine it. */ |
| #ifdef IN_TARGET_LIBS |
| #undef BIGGEST_FIELD_ALIGNMENT |
| #define BIGGEST_FIELD_ALIGNMENT 128 |
| #endif |
| |
| /* These definitions modify those in i386elf.h. */ |
| |
| #undef TARGET_VERSION |
| #define TARGET_VERSION fprintf (stderr, " (NativeClient)"); |
| |
| /* Don't enclose system header files in extern "C" {...}. */ |
| #define NO_IMPLICIT_EXTERN_C |
| |
| /* Provide a STARTFILE_SPEC. Here we add |
| the GNU/Linux magical crtbegin.o file (see crtstuff.c) which provides part of |
| the support for getting C++ file-scope static object constructed before |
| entering `main'. */ |
| |
| #undef STARTFILE_SPEC |
| #if defined HAVE_LD_PIE |
| #define STARTFILE_SPEC \ |
| "%{!shared: %{pg|p|profile:gcrt1.o%s;pie:Scrt1.o%s;:crt1.o%s}} \ |
| crti.o%s %{static:crtbeginT.o%s;shared|pie:crtbeginS.o%s;:crtbegin.o%s}" |
| #else |
| #define STARTFILE_SPEC \ |
| "%{!shared: %{pg|p|profile:gcrt1.o%s;:crt1.o%s}} \ |
| crti.o%s %{static:crtbeginT.o%s;shared|pie:crtbeginS.o%s;:crtbegin.o%s}" |
| #endif |
| |
| /* Provide a ENDFILE_SPEC. Here we tack on |
| the GNU/Linux magical crtend.o file (see crtstuff.c) which provides part of |
| the support for getting C++ file-scope static object constructed before |
| entering `main', followed by a normal GNU/Linux "finalizer" file, `crtn.o'. |
| TODO(pasko): add -ffast-math support to ENDFILE_SPEC. */ |
| |
| #undef ENDFILE_SPEC |
| #define ENDFILE_SPEC \ |
| "%{shared|pie:crtendS.o%s;:crtend.o%s} crtn.o%s" |
| |
| /* This is for -profile to use -lc_p instead of -lc. */ |
| #ifndef CC1_SPEC |
| #define CC1_SPEC "%{profile:-p}" |
| #endif |
| |
| /* The GNU C++ standard library requires that these macros be defined. */ |
| #undef CPLUSPLUS_CPP_SPEC |
| #define CPLUSPLUS_CPP_SPEC "-D_GNU_SOURCE %(cpp)" |
| |
| #undef LIB_SPEC |
| #define LIB_SPEC \ |
| "%{pthread:-lpthread} \ |
| %{shared:-lc} \ |
| %{!shared:%{mieee-fp:-lieee} %{profile:-lc_p}%{!profile:-lc}}" |
| |
| /* Pass the NativeClient specific options to the assembler. */ |
| #undef ASM_SPEC |
| #define ASM_SPEC \ |
| "%{v:-V} %{Qy:} %{!Qn:-Qy} %{n} %{T} " \ |
| "%{fnacl-library-mode:-nacl-library-mode} " \ |
| "%{fnacl-align-16:-nacl-align=4} " \ |
| "%{fnacl-align-32:-nacl-align=5} " \ |
| "%{Ym,*} %{Yd,*} %{Wa,*:%*} %{" SPEC_32 ":--32} %{" SPEC_64 ":--64} " \ |
| "%{!mno-sse2avx:%{mavx:-msse2avx}} %{msse2avx:%{!mavx:-msse2avx}}" |
| |
| #undef LIB_SPEC |
| #define LIB_SPEC \ |
| "%{pthread:-lpthread} \ |
| %{shared:-lc} \ |
| %{!shared:%{mieee-fp:-lieee} %{profile:-lc_p}%{!profile:-lc}}" |
| |
| /* Define this so we can compile MS code for use with WINE. */ |
| #define HANDLE_PRAGMA_PACK_PUSH_POP |
| |
| #if defined(HAVE_LD_EH_FRAME_HDR) |
| #define LINK_EH_SPEC "--no-add-needed %{!static:--eh-frame-hdr} " |
| #endif |
| |
| /* Use --as-needed -lgcc_s for eh support. */ |
| #ifdef HAVE_LD_AS_NEEDED |
| #define USE_LD_AS_NEEDED 1 |
| #endif |
| |
| #define NACL_DYNAMIC_LINKER32 "/lib/ld-nacl-x86-32.so.1" |
| #define NACL_DYNAMIC_LINKER64 "/lib64/ld-nacl-x86-64.so.1" |
| |
| /* Determine whether the entire c99 runtime |
| is present in the runtime library. */ |
| #define TARGET_C99_FUNCTIONS (OPTION_GLIBC) |
| |
| /* Whether we have sincos that follows the GNU extension. */ |
| #define TARGET_HAS_SINCOS (OPTION_GLIBC) |
| |
| #define TARGET_POSIX_IO |
| |
| #if TARGET_64BIT_DEFAULT |
| #define SPEC_32 "m32" |
| #define SPEC_64 "!m32" |
| #else |
| #define SPEC_32 "!m64" |
| #define SPEC_64 "m64" |
| #endif |
| |
| #undef LINK_SPEC |
| #define LINK_SPEC \ |
| "%{" SPEC_64 ":-m elf_x86_64_nacl} %{" SPEC_32 ":-m elf_i386_nacl} \ |
| %{shared:-shared} \ |
| %{!shared: \ |
| %{!static: \ |
| %{rdynamic:-export-dynamic} \ |
| %{" SPEC_32 ":%{!dynamic-linker:-dynamic-linker " NACL_DYNAMIC_LINKER32 "}} \ |
| %{" SPEC_64 ":%{!dynamic-linker:-dynamic-linker " NACL_DYNAMIC_LINKER64 "}}} \ |
| %{static:-static}}" |
| |
| #undef LINK_GCC_C_SEQUENCE_SPEC |
| #define LINK_GCC_C_SEQUENCE_SPEC \ |
| "%{static:--start-group} %G %L %{static:--end-group}%{!static:%G}" |
| |
| #if TARGET_64BIT_DEFAULT |
| #define MULTILIB_DEFAULTS { "m64" } |
| #else |
| #define MULTILIB_DEFAULTS { "m32" } |
| #endif |
| |
| #undef NEED_INDICATE_EXEC_STACK |
| #define NEED_INDICATE_EXEC_STACK 1 |
| |
| #define MD_UNWIND_SUPPORT "config/i386/linux-unwind.h" |
| |
| /* This macro may be overridden in i386/k*bsd-gnu.h. */ |
| #define REG_NAME(reg) reg |
| |
| #ifdef TARGET_LIBC_PROVIDES_SSP |
| /* i386 glibc provides __stack_chk_guard in %gs:0x14, |
| x86_64 glibc provides it in %fs:0x28. */ |
| #define TARGET_THREAD_SSP_OFFSET (TARGET_64BIT ? 0x28 : 0x14) |
| #endif |
| |
| /* Because of NaCl's use of segment registers, negative offsets from gs: will |
| not work. Hence we need to make TLS references explicitly compute the |
| tls base pointer and then indirect relative to it using the default |
| segment descriptor (DS). That is, instead of |
| movl gs:i@NTPOFF, %ecx |
| we use |
| movl %gs:0, %eax |
| movl i@NTPOFF(%eax), %ecx |
| There is a slight performance penalty for TLS accesses, but there does not |
| seem a way around it. */ |
| #undef TARGET_TLS_DIRECT_SEG_REFS_DEFAULT |
| #define TARGET_TLS_DIRECT_SEG_REFS_DEFAULT 0 |
| |
| #define LINUX_TARGET_OS_CPP_BUILTINS() \ |
| do { \ |
| builtin_define_std ("unix"); \ |
| builtin_assert ("system=unix"); \ |
| builtin_assert ("system=posix"); \ |
| } while (0) |
| |
| /* When running in Native Client all inode numbers are identical. |
| TODO(pasko): re-enable inode numbers once the relevant bug is fixed: |
| http://code.google.com/p/nativeclient/issues/detail?id=1555 */ |
| #ifdef __native_client__ |
| #define HOST_LACKS_INODE_NUMBERS 1 |
| #endif |
| |
| #undef TARGET_OS_CPP_BUILTINS |
| #define TARGET_OS_CPP_BUILTINS() \ |
| do \ |
| { \ |
| LINUX_TARGET_OS_CPP_BUILTINS(); \ |
| builtin_define ("__native_client__=1"); \ |
| builtin_define ("__LITTLE_ENDIAN__"); \ |
| } \ |
| while (0) |
| |
| /* NaCl uses are using ILP32 model even on x86-84. */ |
| #undef LONG_TYPE_SIZE |
| #define LONG_TYPE_SIZE 32 |
| #define POINTER_SIZE 32 |
| #define POINTERS_EXTEND_UNSIGNED 1 |
| #undef LONG_DOUBLE_TYPE_SIZE |
| #define LONG_DOUBLE_TYPE_SIZE 64 |
| |
| #undef TARGET_SUBTARGET_DEFAULT |
| #define TARGET_SUBTARGET_DEFAULT (MASK_IEEE_FP) |
| |
| #undef TARGET_SUBTARGET32_DEFAULT |
| #define TARGET_SUBTARGET32_DEFAULT (MASK_80387 | MASK_ALIGN_DOUBLE | MASK_FLOAT_RETURNS) |
| |
| #undef TARGET_SUBTARGET64_DEFAULT |
| #define TARGET_SUBTARGET64_DEFAULT 0 |
| |
| /* Configure script incorrectly detects this GAS capability on x86-64 and hence |
| forces JUMP_TABLES_IN_TEXT_SECTION which cannot validate in NaCl. */ |
| #undef HAVE_AS_GOTOFF_IN_DATA |
| #define HAVE_AS_GOTOFF_IN_DATA 1 |
| |
| /* Configure script incorrectly detects HAVE_GAS_CFI_DIRECTIVE when readelf is |
| not found in PATH. */ |
| #undef HAVE_GAS_CFI_DIRECTIVE |
| #define HAVE_GAS_CFI_DIRECTIVE 1 |
| |
| /* NaCl reserves R15 and makes RBP special in x86-64 mode. */ |
| #undef FIXED_REGISTERS |
| #define FIXED_REGISTERS \ |
| /*ax,dx,cx,bx,si,di,bp,sp,st,st1,st2,st3,st4,st5,st6,st7*/ \ |
| { 0, 0, 0, 0, 0, 0, 3, 1, 0, 0, 0, 0, 0, 0, 0, 0, \ |
| /*arg,flags,fpsr,fpcr,frame*/ \ |
| 1, 1, 1, 1, 1, \ |
| /*xmm0,xmm1,xmm2,xmm3,xmm4,xmm5,xmm6,xmm7*/ \ |
| 0, 0, 0, 0, 0, 0, 0, 0, \ |
| /* mm0, mm1, mm2, mm3, mm4, mm5, mm6, mm7*/ \ |
| 0, 0, 0, 0, 0, 0, 0, 0, \ |
| /* r8, r9, r10, r11, r12, r13, r14, r15*/ \ |
| 2, 2, 2, 2, 2, 2, 2, 1, \ |
| /*xmm8,xmm9,xmm10,xmm11,xmm12,xmm13,xmm14,xmm15*/ \ |
| 2, 2, 2, 2, 2, 2, 2, 2 } |
| #undef CALL_USED_REGISTERS |
| #define CALL_USED_REGISTERS \ |
| /*ax,dx,cx,bx,si,di,bp,sp,st,st1,st2,st3,st4,st5,st6,st7*/ \ |
| { 1, 1, 1, 0, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, \ |
| /*arg,flags,fpsr,fpcr,frame*/ \ |
| 1, 1, 1, 1, 1, \ |
| /*xmm0,xmm1,xmm2,xmm3,xmm4,xmm5,xmm6,xmm7*/ \ |
| 1, 1, 1, 1, 1, 1, 1, 1, \ |
| /* mm0, mm1, mm2, mm3, mm4, mm5, mm6, mm7*/ \ |
| 1, 1, 1, 1, 1, 1, 1, 1, \ |
| /* r8, r9, r10, r11, r12, r13, r14, r15*/ \ |
| 1, 1, 1, 1, 2, 2, 2, 1, \ |
| /*xmm8,xmm9,xmm10,xmm11,xmm12,xmm13,xmm14,xmm15*/ \ |
| 1, 1, 1, 1, 1, 1, 1, 1 } |
| /* Leave is forbidden in NaCl mode */ |
| #undef TARGET_USE_LEAVE |
| #define TARGET_USE_LEAVE (ix86_tune_features[X86_TUNE_USE_LEAVE] && !TARGET_NACL) |
| #undef TARGET_USE_BT |
| #define TARGET_USE_BT (ix86_tune_features[X86_TUNE_USE_BT] && !TARGET_NACL) |
| |
| #undef DBX_REGISTER_NUMBER |
| #define DBX_REGISTER_NUMBER(n) \ |
| (TARGET_64BIT ? dbx64_register_map[n] : svr4_dbx_register_map[n]) |
| |
| #define DWARF2_ADDR_SIZE \ |
| (TARGET_NACL ? (TARGET_64BIT ? 8 : 4) : \ |
| (POINTER_SIZE / BITS_PER_UNIT)) |
| |
| /* -Os is broken and we aren't putting the work into fixing it. |
| See http://code.google.com/p/nativeclient/issues/detail?id=2284 */ |
| #undef SUBTARGET_OVERRIDE_OPTIONS |
| #define SUBTARGET_OVERRIDE_OPTIONS \ |
| do { \ |
| if (TARGET_NACL && optimize_size) \ |
| error ("-Os is not supported by the Native Client compiler"); \ |
| } while (0) |
| |
| |
| /* Profile counters are not available under Native Client. */ |
| #define NO_PROFILE_COUNTERS 1 |
