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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 "base/basictypes.h" |
| 9 #include "courgette/disassembler.h" | 9 #include "courgette/disassembler.h" |
| 10 #include "courgette/memory_allocator.h" | 10 #include "courgette/memory_allocator.h" |
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| 40 // Public for unittests only | 40 // Public for unittests only |
| 41 std::vector<RVA> &Abs32Locations() { return abs32_locations_; } | 41 std::vector<RVA> &Abs32Locations() { return abs32_locations_; } |
| 42 std::vector<RVA> &Rel32Locations() { return rel32_locations_; } | 42 std::vector<RVA> &Rel32Locations() { return rel32_locations_; } |
| 43 | 43 |
| 44 protected: | 44 protected: |
| 45 | 45 |
| 46 uint32 DiscoverLength(); | 46 uint32 DiscoverLength(); |
| 47 | 47 |
| 48 // Misc Section Helpers | 48 // Misc Section Helpers |
| 49 | 49 |
| 50 const Elf32_Half SectionHeaderCount() const { | 50 Elf32_Half SectionHeaderCount() const { |
| 51 return section_header_table_size_; | 51 return section_header_table_size_; |
| 52 } | 52 } |
| 53 | 53 |
| 54 const Elf32_Shdr *SectionHeader(int id) const { | 54 const Elf32_Shdr *SectionHeader(int id) const { |
| 55 assert(id >= 0 && id < SectionHeaderCount()); | 55 assert(id >= 0 && id < SectionHeaderCount()); |
| 56 return section_header_table_ + id; | 56 return section_header_table_ + id; |
| 57 } | 57 } |
| 58 | 58 |
| 59 const uint8 *SectionBody(int id) const { | 59 const uint8 *SectionBody(int id) const { |
| 60 return OffsetToPointer(SectionHeader(id)->sh_offset); | 60 return OffsetToPointer(SectionHeader(id)->sh_offset); |
| 61 } | 61 } |
| 62 | 62 |
| 63 const Elf32_Word SectionBodySize(int id) const { | 63 Elf32_Word SectionBodySize(int id) const { |
| 64 return SectionHeader(id)->sh_size; | 64 return SectionHeader(id)->sh_size; |
| 65 } | 65 } |
| 66 | 66 |
| 67 // Misc Segment Helpers | 67 // Misc Segment Helpers |
| 68 | 68 |
| 69 const Elf32_Half ProgramSegmentHeaderCount() const { | 69 Elf32_Half ProgramSegmentHeaderCount() const { |
| 70 return program_header_table_size_; | 70 return program_header_table_size_; |
| 71 } | 71 } |
| 72 | 72 |
| 73 const Elf32_Phdr *ProgramSegmentHeader(int id) const { | 73 const Elf32_Phdr *ProgramSegmentHeader(int id) const { |
| 74 assert(id >= 0 && id < ProgramSegmentHeaderCount()); | 74 assert(id >= 0 && id < ProgramSegmentHeaderCount()); |
| 75 return program_header_table_ + id; | 75 return program_header_table_ + id; |
| 76 } | 76 } |
| 77 | 77 |
| 78 // The virtual memory address at which this program segment will be loaded | 78 // The virtual memory address at which this program segment will be loaded |
| 79 const Elf32_Addr ProgramSegmentMemoryBegin(int id) const { | 79 Elf32_Addr ProgramSegmentMemoryBegin(int id) const { |
| 80 return ProgramSegmentHeader(id)->p_vaddr; | 80 return ProgramSegmentHeader(id)->p_vaddr; |
| 81 } | 81 } |
| 82 | 82 |
| 83 // The number of virtual memory bytes for this program segment | 83 // The number of virtual memory bytes for this program segment |
| 84 const Elf32_Word ProgramSegmentMemorySize(int id) const { | 84 Elf32_Word ProgramSegmentMemorySize(int id) const { |
| 85 return ProgramSegmentHeader(id)->p_memsz; | 85 return ProgramSegmentHeader(id)->p_memsz; |
| 86 } | 86 } |
| 87 | 87 |
| 88 // Pointer into the source file for this program segment | 88 // Pointer into the source file for this program segment |
| 89 const Elf32_Addr ProgramSegmentFileOffset(int id) const { | 89 Elf32_Addr ProgramSegmentFileOffset(int id) const { |
| 90 return ProgramSegmentHeader(id)->p_offset; | 90 return ProgramSegmentHeader(id)->p_offset; |
| 91 } | 91 } |
| 92 | 92 |
| 93 // Number of file bytes for this program segment. Is <= ProgramMemorySize. | 93 // Number of file bytes for this program segment. Is <= ProgramMemorySize. |
| 94 const Elf32_Word ProgramSegmentFileSize(int id) const { | 94 Elf32_Word ProgramSegmentFileSize(int id) const { |
| 95 return ProgramSegmentHeader(id)->p_filesz; | 95 return ProgramSegmentHeader(id)->p_filesz; |
| 96 } | 96 } |
| 97 | 97 |
| 98 // Misc address space helpers | 98 // Misc address space helpers |
| 99 | 99 |
| 100 CheckBool IsValidRVA(RVA rva) const WARN_UNUSED_RESULT; | 100 CheckBool IsValidRVA(RVA rva) const WARN_UNUSED_RESULT; |
| 101 | 101 |
| 102 // Convert an ELF relocation struction into an RVA | 102 // Convert an ELF relocation struction into an RVA |
| 103 virtual CheckBool RelToRVA(Elf32_Rel rel, RVA* result) | 103 virtual CheckBool RelToRVA(Elf32_Rel rel, RVA* result) |
| 104 const WARN_UNUSED_RESULT = 0; | 104 const WARN_UNUSED_RESULT = 0; |
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| 145 | 145 |
| 146 std::vector<RVA> abs32_locations_; | 146 std::vector<RVA> abs32_locations_; |
| 147 std::vector<RVA> rel32_locations_; | 147 std::vector<RVA> rel32_locations_; |
| 148 | 148 |
| 149 DISALLOW_COPY_AND_ASSIGN(DisassemblerElf32); | 149 DISALLOW_COPY_AND_ASSIGN(DisassemblerElf32); |
| 150 }; | 150 }; |
| 151 | 151 |
| 152 } // namespace courgette | 152 } // namespace courgette |
| 153 | 153 |
| 154 #endif // COURGETTE_DISASSEMBLER_ELF_32_H_ | 154 #endif // COURGETTE_DISASSEMBLER_ELF_32_H_ |
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