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Side by Side Diff: third_party/android_crazy_linker/src/src/crazy_linker_elf_relocations.h

Issue 340523003: Support for unpacked ARM packed relocations. (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@fork_switch
Patch Set: Tidy README.chromium Created 6 years, 6 months ago
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1 // Copyright 2014 The Chromium Authors. All rights reserved. 1 // Copyright 2014 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 CRAZY_LINKER_ELF_RELOCATIONS_H 5 #ifndef CRAZY_LINKER_ELF_RELOCATIONS_H
6 #define CRAZY_LINKER_ELF_RELOCATIONS_H 6 #define CRAZY_LINKER_ELF_RELOCATIONS_H
7 7
8 #include <string.h> 8 #include <string.h>
9 #include <unistd.h>
9 10
10 #include "elf_traits.h" 11 #include "elf_traits.h"
11 12
12 namespace crazy { 13 namespace crazy {
13 14
14 class ElfSymbols; 15 class ElfSymbols;
15 class ElfView; 16 class ElfView;
16 class Error; 17 class Error;
17 18
18 // An ElfRelocations instance holds information about relocations in a mapped 19 // An ElfRelocations instance holds information about relocations in a mapped
(...skipping 15 matching lines...) Expand all
34 virtual void* Lookup(const char* symbol_name) = 0; 35 virtual void* Lookup(const char* symbol_name) = 0;
35 }; 36 };
36 37
37 // Apply all relocations to the target mapped ELF binary. Must be called 38 // Apply all relocations to the target mapped ELF binary. Must be called
38 // after Init(). 39 // after Init().
39 // |symbols| maps to the symbol entries for the target library only. 40 // |symbols| maps to the symbol entries for the target library only.
40 // |resolver| can resolve symbols out of the current library. 41 // |resolver| can resolve symbols out of the current library.
41 // On error, return false and set |error| message. 42 // On error, return false and set |error| message.
42 bool ApplyAll(const ElfSymbols* symbols, 43 bool ApplyAll(const ElfSymbols* symbols,
43 SymbolResolver* resolver, 44 SymbolResolver* resolver,
45 const char* full_path,
44 Error* error); 46 Error* error);
45 47
46 // This function is used to adjust relocated addresses in a copy of an 48 // This function is used to adjust relocated addresses in a copy of an
47 // existing section of an ELF binary. I.e. |src_addr|...|src_addr + size| 49 // existing section of an ELF binary. I.e. |src_addr|...|src_addr + size|
48 // must be inside the mapped ELF binary, this function will first copy its 50 // must be inside the mapped ELF binary, this function will first copy its
49 // content into |dst_addr|...|dst_addr + size|, then adjust all relocated 51 // content into |dst_addr|...|dst_addr + size|, then adjust all relocated
50 // addresses inside the destination section as if it was loaded/mapped 52 // addresses inside the destination section as if it was loaded/mapped
51 // at |map_addr|...|map_addr + size|. Only relative relocations are processed, 53 // at |map_addr|...|map_addr + size|. Only relative relocations are processed,
52 // symbolic ones are ignored. 54 // symbolic ones are ignored.
53 void CopyAndRelocate(size_t src_addr, 55 void CopyAndRelocate(size_t src_addr,
(...skipping 33 matching lines...) Expand 10 before | Expand all | Expand 10 after
87 size_t map_delta); 89 size_t map_delta);
88 void RelocateRela(size_t src_addr, 90 void RelocateRela(size_t src_addr,
89 size_t dst_addr, 91 size_t dst_addr,
90 size_t map_addr, 92 size_t map_addr,
91 size_t size); 93 size_t size);
92 void RelocateRel(size_t src_addr, 94 void RelocateRel(size_t src_addr,
93 size_t dst_addr, 95 size_t dst_addr,
94 size_t map_addr, 96 size_t map_addr,
95 size_t size); 97 size_t size);
96 98
99 #if defined(__arm__)
100 bool ApplyArmPackedRelocs(const char* full_path,
101 Error* error);
102 #endif
103
97 #if defined(__mips__) 104 #if defined(__mips__)
98 bool RelocateMipsGot(const ElfSymbols* symbols, 105 bool RelocateMipsGot(const ElfSymbols* symbols,
99 SymbolResolver* resolver, 106 SymbolResolver* resolver,
100 Error* error); 107 Error* error);
101 #endif 108 #endif
102 109
103 const ELF::Phdr* phdr_; 110 const ELF::Phdr* phdr_;
104 size_t phdr_count_; 111 size_t phdr_count_;
105 size_t load_bias_; 112 size_t load_bias_;
106 113
107 ELF::Addr relocations_type_; 114 ELF::Addr relocations_type_;
108 ELF::Addr plt_relocations_; 115 ELF::Addr plt_relocations_;
109 size_t plt_relocations_size_; 116 size_t plt_relocations_size_;
110 ELF::Addr* plt_got_; 117 ELF::Addr* plt_got_;
111 118
112 ELF::Addr relocations_; 119 ELF::Addr relocations_;
113 size_t relocations_size_; 120 size_t relocations_size_;
114 121
122 #if defined(__arm__)
123 // ARM-specific data, supports decoding packed relocations.
124 off_t arm_packed_relocations_;
125 size_t arm_packed_relocations_size_;
126 #endif
127
115 #if defined(__mips__) 128 #if defined(__mips__)
116 // MIPS-specific relocation fields. 129 // MIPS-specific relocation fields.
117 ELF::Word mips_symtab_count_; 130 ELF::Word mips_symtab_count_;
118 ELF::Word mips_local_got_count_; 131 ELF::Word mips_local_got_count_;
119 ELF::Word mips_gotsym_; 132 ELF::Word mips_gotsym_;
120 #endif 133 #endif
121 134
122 bool has_text_relocations_; 135 bool has_text_relocations_;
123 bool has_symbolic_; 136 bool has_symbolic_;
124 }; 137 };
125 138
126 } // namespace crazy 139 } // namespace crazy
127 140
128 #endif // CRAZY_LINKER_ELF_RELOCATIONS_H 141 #endif // CRAZY_LINKER_ELF_RELOCATIONS_H
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