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| 1 // Copyright 2013 The Chromium Authors. All rights reserved. | 1 // Copyright 2013 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 | 4 |
| 5 #ifndef COURGETTE_DISASSEMBLER_ELF_32_H_ | 5 #ifndef COURGETTE_DISASSEMBLER_ELF_32_H_ |
| 6 #define COURGETTE_DISASSEMBLER_ELF_32_H_ | 6 #define COURGETTE_DISASSEMBLER_ELF_32_H_ |
| 7 | 7 |
| 8 #include "base/basictypes.h" | 8 #include <stddef.h> |
| 9 #include <stdint.h> |
| 10 |
| 11 #include "base/macros.h" |
| 9 #include "base/memory/scoped_vector.h" | 12 #include "base/memory/scoped_vector.h" |
| 10 #include "courgette/assembly_program.h" | 13 #include "courgette/assembly_program.h" |
| 11 #include "courgette/disassembler.h" | 14 #include "courgette/disassembler.h" |
| 12 #include "courgette/memory_allocator.h" | 15 #include "courgette/memory_allocator.h" |
| 13 #include "courgette/types_elf.h" | 16 #include "courgette/types_elf.h" |
| 14 | 17 |
| 15 namespace courgette { | 18 namespace courgette { |
| 16 | 19 |
| 17 class AssemblyProgram; | 20 class AssemblyProgram; |
| 18 | 21 |
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| 49 | 52 |
| 50 size_t get_offset() { | 53 size_t get_offset() { |
| 51 return offset_; | 54 return offset_; |
| 52 } | 55 } |
| 53 | 56 |
| 54 void set_offset(size_t offset) { | 57 void set_offset(size_t offset) { |
| 55 offset_ = offset; | 58 offset_ = offset; |
| 56 } | 59 } |
| 57 | 60 |
| 58 // Computes the relative jump's offset from the op in p. | 61 // Computes the relative jump's offset from the op in p. |
| 59 virtual CheckBool ComputeRelativeTarget(const uint8* op_pointer) = 0; | 62 virtual CheckBool ComputeRelativeTarget(const uint8_t* op_pointer) = 0; |
| 60 | 63 |
| 61 // Emits the courgette instruction corresponding to the RVA type. | 64 // Emits the courgette instruction corresponding to the RVA type. |
| 62 virtual CheckBool EmitInstruction(AssemblyProgram* program, | 65 virtual CheckBool EmitInstruction(AssemblyProgram* program, |
| 63 RVA target_rva) = 0; | 66 RVA target_rva) = 0; |
| 64 | 67 |
| 65 virtual uint16 op_size() const = 0; | 68 virtual uint16_t op_size() const = 0; |
| 66 | 69 |
| 67 static bool IsLessThan(TypedRVA *a, TypedRVA *b) { | 70 static bool IsLessThan(TypedRVA *a, TypedRVA *b) { |
| 68 return a->rva() < b->rva(); | 71 return a->rva() < b->rva(); |
| 69 } | 72 } |
| 70 | 73 |
| 71 private: | 74 private: |
| 72 const RVA rva_; | 75 const RVA rva_; |
| 73 RVA relative_target_; | 76 RVA relative_target_; |
| 74 size_t offset_; | 77 size_t offset_; |
| 75 }; | 78 }; |
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| 102 | 105 |
| 103 Elf32_Half SectionHeaderCount() const { | 106 Elf32_Half SectionHeaderCount() const { |
| 104 return section_header_table_size_; | 107 return section_header_table_size_; |
| 105 } | 108 } |
| 106 | 109 |
| 107 const Elf32_Shdr *SectionHeader(int id) const { | 110 const Elf32_Shdr *SectionHeader(int id) const { |
| 108 assert(id >= 0 && id < SectionHeaderCount()); | 111 assert(id >= 0 && id < SectionHeaderCount()); |
| 109 return section_header_table_ + id; | 112 return section_header_table_ + id; |
| 110 } | 113 } |
| 111 | 114 |
| 112 const uint8 *SectionBody(int id) const { | 115 const uint8_t* SectionBody(int id) const { |
| 113 return OffsetToPointer(SectionHeader(id)->sh_offset); | 116 return OffsetToPointer(SectionHeader(id)->sh_offset); |
| 114 } | 117 } |
| 115 | 118 |
| 116 Elf32_Word SectionBodySize(int id) const { | 119 Elf32_Word SectionBodySize(int id) const { |
| 117 return SectionHeader(id)->sh_size; | 120 return SectionHeader(id)->sh_size; |
| 118 } | 121 } |
| 119 | 122 |
| 120 // Misc Segment Helpers | 123 // Misc Segment Helpers |
| 121 | 124 |
| 122 Elf32_Half ProgramSegmentHeaderCount() const { | 125 Elf32_Half ProgramSegmentHeaderCount() const { |
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| 201 | 204 |
| 202 std::vector<RVA> abs32_locations_; | 205 std::vector<RVA> abs32_locations_; |
| 203 ScopedVector<TypedRVA> rel32_locations_; | 206 ScopedVector<TypedRVA> rel32_locations_; |
| 204 | 207 |
| 205 DISALLOW_COPY_AND_ASSIGN(DisassemblerElf32); | 208 DISALLOW_COPY_AND_ASSIGN(DisassemblerElf32); |
| 206 }; | 209 }; |
| 207 | 210 |
| 208 } // namespace courgette | 211 } // namespace courgette |
| 209 | 212 |
| 210 #endif // COURGETTE_DISASSEMBLER_ELF_32_H_ | 213 #endif // COURGETTE_DISASSEMBLER_ELF_32_H_ |
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