Dmitriy Ivanov | 87a0617 | 2015-02-06 10:56:28 -0800 | [diff] [blame^] | 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 |
| 3 | // found in the LICENSE file. |
| 4 | |
| 5 | // Target-specific ELF type traits. |
| 6 | |
| 7 | #ifndef TOOLS_RELOCATION_PACKER_SRC_ELF_TRAITS_H_ |
| 8 | #define TOOLS_RELOCATION_PACKER_SRC_ELF_TRAITS_H_ |
| 9 | |
| 10 | #include "elf.h" |
| 11 | #include "libelf.h" |
| 12 | |
| 13 | // The TARGET_ macro controls which Elf types we expect and handle. |
| 14 | // Either TARGET_ARM or TARGET_ARM64 must be defined, but not both. |
| 15 | |
| 16 | #if !defined(TARGET_ARM) && !defined(TARGET_ARM64) |
| 17 | # error "Unsupported target, define one of TARGET_ARM or TARGET_ARM64" |
| 18 | #elif defined(TARGET_ARM) && defined(TARGET_ARM64) |
| 19 | # error "Define one of TARGET_ARM or TARGET_ARM64, but not both" |
| 20 | #endif |
| 21 | |
| 22 | // TODO(simonb): Eliminate these once AARCH64 appears reliably in elf.h. |
| 23 | #ifndef EM_AARCH64 |
| 24 | #define EM_AARCH64 183 |
| 25 | #endif |
| 26 | #ifndef R_AARCH64_RELATIVE |
| 27 | #define R_AARCH64_RELATIVE 1027 |
| 28 | #endif |
| 29 | #ifndef R_AARCH64_NONE |
| 30 | #define R_AARCH64_NONE 0 |
| 31 | #endif |
| 32 | |
| 33 | // ELF is a traits structure used to provide convenient aliases for |
| 34 | // 32/64 bit Elf types and functions, depending on the target specified. |
| 35 | |
| 36 | #if defined(TARGET_ARM) |
| 37 | struct ELF { |
| 38 | typedef Elf32_Addr Addr; |
| 39 | typedef Elf32_Dyn Dyn; |
| 40 | typedef Elf32_Ehdr Ehdr; |
| 41 | typedef Elf32_Off Off; |
| 42 | typedef Elf32_Phdr Phdr; |
| 43 | typedef Elf32_Rel Rel; |
| 44 | typedef Elf32_Rela Rela; |
| 45 | typedef Elf32_Shdr Shdr; |
| 46 | typedef Elf32_Sword Sword; |
| 47 | typedef Elf32_Sxword Sxword; |
| 48 | typedef Elf32_Sym Sym; |
| 49 | typedef Elf32_Word Word; |
| 50 | typedef Elf32_Xword Xword; |
| 51 | |
| 52 | static inline Ehdr* getehdr(Elf* elf) { return elf32_getehdr(elf); } |
| 53 | static inline Phdr* getphdr(Elf* elf) { return elf32_getphdr(elf); } |
| 54 | static inline Shdr* getshdr(Elf_Scn* scn) { return elf32_getshdr(scn); } |
| 55 | |
| 56 | enum { kMachine = EM_ARM }; |
| 57 | enum { kFileClass = ELFCLASS32 }; |
| 58 | enum { kRelativeRelocationCode = R_ARM_RELATIVE }; |
| 59 | enum { kNoRelocationCode = R_ARM_NONE }; |
| 60 | enum { kGnuStackSegmentAlignment = 0 }; |
| 61 | |
| 62 | static inline const char* Machine() { return "ARM"; } |
| 63 | |
| 64 | # define ELF_R_SYM(val) ELF32_R_SYM(val) |
| 65 | # define ELF_R_TYPE(val) ELF32_R_TYPE(val) |
| 66 | # define ELF_R_INFO(sym, type) ELF32_R_INFO(sym, type) |
| 67 | # define ELF_ST_TYPE(val) ELF32_ST_TYPE(val) |
| 68 | }; |
| 69 | |
| 70 | #elif defined(TARGET_ARM64) |
| 71 | struct ELF { |
| 72 | typedef Elf64_Addr Addr; |
| 73 | typedef Elf64_Dyn Dyn; |
| 74 | typedef Elf64_Ehdr Ehdr; |
| 75 | typedef Elf64_Off Off; |
| 76 | typedef Elf64_Phdr Phdr; |
| 77 | typedef Elf64_Rel Rel; |
| 78 | typedef Elf64_Rela Rela; |
| 79 | typedef Elf64_Shdr Shdr; |
| 80 | typedef Elf64_Sword Sword; |
| 81 | typedef Elf64_Sxword Sxword; |
| 82 | typedef Elf64_Sym Sym; |
| 83 | typedef Elf64_Word Word; |
| 84 | typedef Elf64_Xword Xword; |
| 85 | |
| 86 | static inline Ehdr* getehdr(Elf* elf) { return elf64_getehdr(elf); } |
| 87 | static inline Phdr* getphdr(Elf* elf) { return elf64_getphdr(elf); } |
| 88 | static inline Shdr* getshdr(Elf_Scn* scn) { return elf64_getshdr(scn); } |
| 89 | |
| 90 | enum { kMachine = EM_AARCH64 }; |
| 91 | enum { kFileClass = ELFCLASS64 }; |
| 92 | enum { kRelativeRelocationCode = R_AARCH64_RELATIVE }; |
| 93 | enum { kNoRelocationCode = R_AARCH64_NONE }; |
| 94 | enum { kGnuStackSegmentAlignment = 16 }; |
| 95 | |
| 96 | static inline const char* Machine() { return "ARM64"; } |
| 97 | |
| 98 | # define ELF_R_SYM(val) ELF64_R_SYM(val) |
| 99 | # define ELF_R_TYPE(val) ELF64_R_TYPE(val) |
| 100 | # define ELF_R_INFO(sym, type) ELF64_R_INFO(sym, type) |
| 101 | # define ELF_ST_TYPE(val) ELF64_ST_TYPE(val) |
| 102 | }; |
| 103 | #endif |
| 104 | |
| 105 | #endif // TOOLS_RELOCATION_PACKER_SRC_ELF_TRAITS_H_ |