| // Copyright 2014 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| // Target-specific ELF type traits. |
| |
| #ifndef TOOLS_RELOCATION_PACKER_SRC_ELF_TRAITS_H_ |
| #define TOOLS_RELOCATION_PACKER_SRC_ELF_TRAITS_H_ |
| |
| #include "elf.h" |
| #include "libelf.h" |
| |
| // The TARGET_ macro controls which Elf types we expect and handle. |
| // Either TARGET_ARM or TARGET_ARM64 must be defined, but not both. |
| |
| #if !defined(TARGET_ARM) && !defined(TARGET_ARM64) |
| # error "Unsupported target, define one of TARGET_ARM or TARGET_ARM64" |
| #elif defined(TARGET_ARM) && defined(TARGET_ARM64) |
| # error "Define one of TARGET_ARM or TARGET_ARM64, but not both" |
| #endif |
| |
| // TODO(simonb): Eliminate these once AARCH64 appears reliably in elf.h. |
| #ifndef EM_AARCH64 |
| #define EM_AARCH64 183 |
| #endif |
| #ifndef R_AARCH64_RELATIVE |
| #define R_AARCH64_RELATIVE 1027 |
| #endif |
| #ifndef R_AARCH64_NONE |
| #define R_AARCH64_NONE 0 |
| #endif |
| |
| // ELF is a traits structure used to provide convenient aliases for |
| // 32/64 bit Elf types and functions, depending on the target specified. |
| |
| #if defined(TARGET_ARM) |
| struct ELF { |
| typedef Elf32_Addr Addr; |
| typedef Elf32_Dyn Dyn; |
| typedef Elf32_Ehdr Ehdr; |
| typedef Elf32_Off Off; |
| typedef Elf32_Phdr Phdr; |
| typedef Elf32_Rel Rel; |
| typedef Elf32_Rela Rela; |
| typedef Elf32_Shdr Shdr; |
| typedef Elf32_Sword Sword; |
| typedef Elf32_Sxword Sxword; |
| typedef Elf32_Sym Sym; |
| typedef Elf32_Word Word; |
| typedef Elf32_Xword Xword; |
| |
| static inline Ehdr* getehdr(Elf* elf) { return elf32_getehdr(elf); } |
| static inline Phdr* getphdr(Elf* elf) { return elf32_getphdr(elf); } |
| static inline Shdr* getshdr(Elf_Scn* scn) { return elf32_getshdr(scn); } |
| |
| enum { kMachine = EM_ARM }; |
| enum { kFileClass = ELFCLASS32 }; |
| enum { kRelativeRelocationCode = R_ARM_RELATIVE }; |
| enum { kNoRelocationCode = R_ARM_NONE }; |
| |
| static inline const char* Machine() { return "ARM"; } |
| |
| # define ELF_R_SYM(val) ELF32_R_SYM(val) |
| # define ELF_R_TYPE(val) ELF32_R_TYPE(val) |
| # define ELF_R_INFO(sym, type) ELF32_R_INFO(sym, type) |
| # define ELF_ST_TYPE(val) ELF32_ST_TYPE(val) |
| }; |
| |
| #elif defined(TARGET_ARM64) |
| struct ELF { |
| typedef Elf64_Addr Addr; |
| typedef Elf64_Dyn Dyn; |
| typedef Elf64_Ehdr Ehdr; |
| typedef Elf64_Off Off; |
| typedef Elf64_Phdr Phdr; |
| typedef Elf64_Rel Rel; |
| typedef Elf64_Rela Rela; |
| typedef Elf64_Shdr Shdr; |
| typedef Elf64_Sword Sword; |
| typedef Elf64_Sxword Sxword; |
| typedef Elf64_Sym Sym; |
| typedef Elf64_Word Word; |
| typedef Elf64_Xword Xword; |
| |
| static inline Ehdr* getehdr(Elf* elf) { return elf64_getehdr(elf); } |
| static inline Phdr* getphdr(Elf* elf) { return elf64_getphdr(elf); } |
| static inline Shdr* getshdr(Elf_Scn* scn) { return elf64_getshdr(scn); } |
| |
| enum { kMachine = EM_AARCH64 }; |
| enum { kFileClass = ELFCLASS64 }; |
| enum { kRelativeRelocationCode = R_AARCH64_RELATIVE }; |
| enum { kNoRelocationCode = R_AARCH64_NONE }; |
| |
| static inline const char* Machine() { return "ARM64"; } |
| |
| # define ELF_R_SYM(val) ELF64_R_SYM(val) |
| # define ELF_R_TYPE(val) ELF64_R_TYPE(val) |
| # define ELF_R_INFO(sym, type) ELF64_R_INFO(sym, type) |
| # define ELF_ST_TYPE(val) ELF64_ST_TYPE(val) |
| }; |
| #endif |
| |
| #endif // TOOLS_RELOCATION_PACKER_SRC_ELF_TRAITS_H_ |