1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef COURGETTE_DISASSEMBLER_ELF_32_X86_H_ 6 #define COURGETTE_DISASSEMBLER_ELF_32_X86_H_ 7 8 #include "base/basictypes.h" 9 #include "courgette/disassembler_elf_32.h" 10 #include "courgette/memory_allocator.h" 11 #include "courgette/types_elf.h" 12 13 namespace courgette { 14 15 class AssemblyProgram; 16 17 class DisassemblerElf32X86 : public DisassemblerElf32 { 18 public: 19 class TypedRVAX86 : public TypedRVA { 20 public: TypedRVAX86(RVA rva)21 explicit TypedRVAX86(RVA rva) : TypedRVA(rva) { 22 } 23 ComputeRelativeTarget(const uint8 * op_pointer)24 virtual CheckBool ComputeRelativeTarget(const uint8* op_pointer) OVERRIDE { 25 set_relative_target(Read32LittleEndian(op_pointer) + 4); 26 return true; 27 } 28 EmitInstruction(AssemblyProgram * program,RVA target_rva)29 virtual CheckBool EmitInstruction(AssemblyProgram* program, 30 RVA target_rva) OVERRIDE { 31 return program->EmitRel32(program->FindOrMakeRel32Label(target_rva)); 32 } 33 op_size()34 virtual uint16 op_size() const OVERRIDE { return 4; } 35 }; 36 37 explicit DisassemblerElf32X86(const void* start, size_t length); 38 kind()39 virtual ExecutableType kind() { return EXE_ELF_32_X86; } 40 ElfEM()41 virtual e_machine_values ElfEM() { return EM_386; } 42 43 protected: 44 virtual CheckBool RelToRVA(Elf32_Rel rel, RVA* result) 45 const WARN_UNUSED_RESULT; 46 47 virtual CheckBool ParseRelocationSection( 48 const Elf32_Shdr *section_header, 49 AssemblyProgram* program) WARN_UNUSED_RESULT; 50 51 virtual CheckBool ParseRel32RelocsFromSection( 52 const Elf32_Shdr* section) WARN_UNUSED_RESULT; 53 54 #if COURGETTE_HISTOGRAM_TARGETS 55 std::map<RVA, int> rel32_target_rvas_; 56 #endif 57 58 DISALLOW_COPY_AND_ASSIGN(DisassemblerElf32X86); 59 }; 60 61 } // namespace courgette 62 63 #endif // COURGETTE_DISASSEMBLER_ELF_32_X86_H_ 64