| // Copyright 2013 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef COURGETTE_DISASSEMBLER_ELF_32_ARM_H_ |
| #define COURGETTE_DISASSEMBLER_ELF_32_ARM_H_ |
| |
| #include <stddef.h> |
| #include <stdint.h> |
| |
| #include "base/macros.h" |
| #include "courgette/disassembler_elf_32.h" |
| #include "courgette/memory_allocator.h" |
| #include "courgette/types_elf.h" |
| |
| namespace courgette { |
| |
| class AssemblyProgram; |
| |
| enum ARM_RVA { |
| ARM_OFF8, |
| ARM_OFF11, |
| ARM_OFF24, |
| ARM_OFF25, |
| ARM_OFF21, |
| }; |
| |
| class DisassemblerElf32ARM : public DisassemblerElf32 { |
| public: |
| class TypedRVAARM : public TypedRVA { |
| public: |
| TypedRVAARM(ARM_RVA type, RVA rva) : TypedRVA(rva), type_(type) { } |
| |
| uint16_t c_op() const { return c_op_; } |
| |
| virtual CheckBool ComputeRelativeTarget(const uint8_t* op_pointer); |
| |
| virtual CheckBool EmitInstruction(AssemblyProgram* program, |
| RVA target_rva); |
| |
| virtual uint16_t op_size() const; |
| |
| private: |
| ARM_RVA type_; |
| |
| uint16_t c_op_; // set by ComputeRelativeTarget() |
| const uint8_t* arm_op_; |
| }; |
| |
| explicit DisassemblerElf32ARM(const void* start, size_t length); |
| |
| virtual ExecutableType kind() { return EXE_ELF_32_ARM; } |
| |
| virtual e_machine_values ElfEM() { return EM_ARM; } |
| |
| static CheckBool Compress(ARM_RVA type, |
| uint32_t arm_op, |
| RVA rva, |
| uint16_t* c_op /* out */, |
| uint32_t* addr /* out */); |
| |
| static CheckBool Decompress(ARM_RVA type, |
| uint16_t c_op, |
| uint32_t addr, |
| uint32_t* arm_op /* out */); |
| |
| protected: |
| |
| virtual CheckBool RelToRVA(Elf32_Rel rel, RVA* result) |
| const WARN_UNUSED_RESULT; |
| |
| virtual CheckBool ParseRelocationSection( |
| const Elf32_Shdr *section_header, |
| AssemblyProgram* program) WARN_UNUSED_RESULT; |
| |
| virtual CheckBool ParseRel32RelocsFromSection( |
| const Elf32_Shdr* section) WARN_UNUSED_RESULT; |
| |
| #if COURGETTE_HISTOGRAM_TARGETS |
| std::map<RVA, int> rel32_target_rvas_; |
| #endif |
| |
| DISALLOW_COPY_AND_ASSIGN(DisassemblerElf32ARM); |
| }; |
| |
| } // namespace courgette |
| |
| #endif // COURGETTE_DISASSEMBLER_ELF_32_ARM_H_ |