365 lines
7.1 KiB
C
365 lines
7.1 KiB
C
/*
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* Copyright (c) 2010, 2014 Wind River Systems, Inc.
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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/* @file
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* @brief Executable and Linking Format (ELF) definitions
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*
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* The definitions in this header conform to the "Tool Interface Standard (TIS)
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* Executable and Linking Format (ELF) Specification Version 1.2"
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*/
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#ifndef _ELF_H
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#define _ELF_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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typedef unsigned int Elf32_Addr;
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typedef unsigned short Elf32_Half;
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typedef unsigned int Elf32_Off;
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typedef int Elf32_Sword;
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typedef unsigned int Elf32_Word;
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/*
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* Elf header
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*/
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#define EI_NIDENT 16
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typedef struct
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{
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unsigned char e_ident[EI_NIDENT];
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Elf32_Half e_type;
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Elf32_Half e_machine;
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Elf32_Word e_version;
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Elf32_Addr e_entry;
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Elf32_Off e_phoff;
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Elf32_Off e_shoff;
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Elf32_Word e_flags;
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Elf32_Half e_ehsize;
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Elf32_Half e_phentsize;
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Elf32_Half e_phnum;
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Elf32_Half e_shentsize;
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Elf32_Half e_shnum;
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Elf32_Half e_shstrndx;
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} Elf32_Ehdr;
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#define EHDRSZ sizeof(Elf32_Ehdr)
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/*
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* e_ident[] values
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*/
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#define EI_MAG0 0
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#define EI_MAG1 1
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#define EI_MAG2 2
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#define EI_MAG3 3
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#define EI_CLASS 4
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#define EI_DATA 5
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#define EI_VERSION 6
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#define EI_PAD 7
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#define ELFMAG0 0x7f
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#define ELFMAG1 'E'
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#define ELFMAG2 'L'
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#define ELFMAG3 'F'
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#define ELFMAG "\177ELF"
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#define SELFMAG 4
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/*
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* EI_CLASS
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*/
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#define ELFCLASSNONE 0
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#define ELFCLASS32 1
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#define ELFCLASS64 2
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/*
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* EI_DATA
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*/
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#define ELFDATANONE 0
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#define ELFDATA2LSB 1
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#define ELFDATA2MSB 2
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/*
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* e_type
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*/
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#define ET_NONE 0
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#define ET_REL 1
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#define ET_EXEC 2
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#define ET_DYN 3
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#define ET_CORE 4
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#define ET_LOPROC 0xff00
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#define ET_HIPROC 0xffff
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/*
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* e_machine
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*/
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#define EM_NONE 0 /* No machine */
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#define EM_M32 1 /* AT&T WE 32100 */
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#define EM_SPARC 2 /* SPARC */
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#define EM_386 3 /* Intel 80386 */
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#define EM_68K 4 /* Motorola 68000 */
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#define EM_88K 5 /* Motorola 88000 */
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#define EM_486 6 /* Intel 80486 */
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#define EM_860 7 /* Intel 80860 */
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#define EM_MIPS 8 /* MIPS RS3000 Big-Endian */
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#define EM_MIPS_RS4_BE 10 /* MIPS RS4000 Big-Endian */
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#define EM_PPC_OLD 17 /* PowerPC - old */
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#define EM_PPC 20 /* PowerPC */
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#define EM_RCE_OLD 25 /* RCE - old */
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#define EM_NEC_830 36 /* NEC 830 series */
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#define EM_RCE 39 /* RCE */
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#define EM_MCORE 39 /* MCORE */
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#define EM_ARM 40 /* ARM */
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#define EM_SH 42 /* SH */
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#define EM_COLDFIRE 52 /* Motorola ColdFire */
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#define EM_SC 58 /* SC */
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#define EM_M32R 36929 /* M32R */
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#define EM_NEC 36992 /* NEC 850 series */
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/*
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* e_flags
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*/
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#define EF_PPC_EMB 0x80000000
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#define EF_MIPS_NOREORDER 0x00000001
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#define EF_MIPS_PIC 0x00000002
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#define EF_MIPS_CPIC 0x00000004
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#define EF_MIPS_ARCH 0xf0000000
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#define EF_MIPS_ARCH_MIPS_2 0x10000000
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#define EF_MIPS_ARCH_MIPS_3 0x20000000
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/*
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* e_version and EI_VERSION
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*/
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#define EV_NONE 0
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#define EV_CURRENT 1
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/*
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* Special section indexes
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*/
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#define SHN_UNDEF 0
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#define SHN_LORESERVE 0xff00
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#define SHN_LOPROC 0xff00
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#define SHN_HIPROC 0xff1f
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#define SHN_ABS 0xfff1
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#define SHN_COMMON 0xfff2
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#define SHN_HIRESERVE 0xffff
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#define SHN_GHCOMMON 0xff00
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/*
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* Section header
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*/
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typedef struct
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{
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Elf32_Word sh_name;
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Elf32_Word sh_type; /* SHT_... */
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Elf32_Word sh_flags; /* SHF_... */
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Elf32_Addr sh_addr;
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Elf32_Off sh_offset;
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Elf32_Word sh_size;
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Elf32_Word sh_link;
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Elf32_Word sh_info;
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Elf32_Word sh_addralign;
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Elf32_Word sh_entsize;
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} Elf32_Shdr;
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#define SHDRSZ sizeof(Elf32_Shdr)
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/*
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* sh_type
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*/
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#define SHT_NULL 0
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#define SHT_PROGBITS 1
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#define SHT_SYMTAB 2
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#define SHT_STRTAB 3
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#define SHT_RELA 4
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#define SHT_HASH 5
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#define SHT_DYNAMIC 6
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#define SHT_NOTE 7
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#define SHT_NOBITS 8
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#define SHT_REL 9
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#define SHT_SHLIB 10
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#define SHT_DYNSYM 11
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#define SHT_COMDAT 12
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#define SHT_LOPROC 0x70000000
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#define SHT_HIPROC 0x7fffffff
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#define SHT_LOUSER 0x80000000
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#define SHT_HIUSER 0xffffffff
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#define SHT_INIT_ARRAY 14
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#define SHT_FINI_ARRAY 15
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#define SHT_PREINIT_ARRAY 16
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#define SHT_GROUP 17
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#define SHT_SYMTAB_SHNDX 18
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#define SHT_NUM 19
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/*
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* sh_flags
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*/
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#define SHF_WRITE 0x1
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#define SHF_ALLOC 0x2
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#define SHF_EXECINSTR 0x4
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#define SHF_MASKPROC 0xf0000000
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#define SHF_MERGE 0x10 /* not part of all ELF ABI docs */
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#define SHF_STRINGS 0x20 /* not part of all ELF ABI docs */
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#define SHF_INFO_LINK 0x40
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#define SHF_LINK_ORDER 0x80
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#define SHF_OS_NONCONFORMING 0x100
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#define SHF_GROUP 0x200
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#define SHF_TLS 0x400
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/*
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* Symbol table
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*/
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typedef struct
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{
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Elf32_Word st_name;
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Elf32_Addr st_value;
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Elf32_Word st_size;
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unsigned char st_info;
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unsigned char st_other;
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Elf32_Half st_shndx;
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} Elf32_Sym;
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#define STN_UNDEF 0
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#define STB_LOCAL 0
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#define STB_GLOBAL 1
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#define STB_WEAK 2
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#define STB_LOPROC 13
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#define STB_HIPROC 15
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#define STT_NOTYPE 0
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#define STT_OBJECT 1
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#define STT_FUNC 2
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#define STT_SECTION 3
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#define STT_FILE 4
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#define STT_COMMON 5
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#define STT_TLS 6
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#define STT_LOOS 10
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#define STT_HIOS 12
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#define STT_LOPROC 13
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#define STT_HIPROC 15
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#define ELF_ST_BIND(x) ((x) >> 4)
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#define ELF_ST_TYPE(x) (((unsigned int) x) & 0xf)
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#define ELF32_ST_BIND(x) ELF_ST_BIND(x)
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#define ELF32_ST_TYPE(x) ELF_ST_TYPE(x)
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/*
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* The STT_ARM_TFUNC type is used by the gnu compiler to mark Thumb
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* functions. The STT_ARM_16BIT type is the thumb equivalent of an
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* object. They are not part of the ARM ABI or EABI - they come from gnu.
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*/
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#define STT_ARM_TFUNC STT_LOPROC /* GNU Thumb function */
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#define STT_ARM_16BIT STT_HIPROC /* GNU Thumb label */
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/*
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* Relocation
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*/
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typedef struct
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{
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Elf32_Addr r_offset;
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Elf32_Word r_info;
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} Elf32_Rel;
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typedef struct
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{
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Elf32_Addr r_offset;
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Elf32_Word r_info;
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Elf32_Sword r_addend;
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} Elf32_Rela;
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#define ELF32_R_SYM(info) ((info)>>8)
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#define ELF32_R_TYPE(info) ((unsigned char)(info))
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#define ELF32_R_INFO(sym,type) (((sym)<<8)+(unsigned char)(type))
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/*
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* Program header
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*/
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typedef struct
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{
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Elf32_Word p_type;
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Elf32_Off p_offset;
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Elf32_Addr p_vaddr;
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Elf32_Addr p_paddr;
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Elf32_Word p_filesz;
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Elf32_Word p_memsz;
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Elf32_Word p_flags;
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Elf32_Word p_align;
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} Elf32_Phdr;
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#define PHDRSZ sizeof(Elf32_Phdr)
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/*
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* p_type
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*/
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#define PT_NULL 0
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#define PT_LOAD 1
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#define PT_DYNAMIC 2
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#define PT_INTERP 3
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#define PT_NOTE 4
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#define PT_SHLIB 5
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#define PT_PHDR 6
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#define PT_LOPROC 0x70000000
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#define PT_HIPROC 0x7fffffff
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/*
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* p_flags
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*/
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#define PF_X 0x1
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#define PF_W 0x2
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#define PF_R 0x4
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#define PF_MASKPROC 0xf0000000
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typedef struct
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{
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Elf32_Sword d_tag;
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union
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{
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Elf32_Word d_val;
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Elf32_Addr d_ptr;
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} d_un;
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} Elf32_Dyn;
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#define DT_NULL 0
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#define DT_NEEDED 1
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#define DT_PLTRELSZ 2
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#define DT_PLTGOT 3
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#define DT_HASH 4
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#define DT_STRTAB 5
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#define DT_SYMTAB 6
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#define DT_RELA 7
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#define DT_RELASZ 8
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#define DT_RELAENT 9
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#define DT_STRSZ 10
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#define DT_SYMENT 11
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#define DT_INIT 12
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#define DT_FINI 13
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#define DT_SONAME 14
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#define DT_RPATH 15
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#define DT_SYMBOLIC 16
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#define DT_REL 17
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#define DT_RELSZ 18
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#define DT_RELENT 19
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#define DT_PLTREL 20
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#define DT_DEBUG 21
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#define DT_TEXTREL 22
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#define DT_JMPREL 23
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#define DT_LOPROC 0x70000000
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#define DT_HIPROC 0x7fffffff
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#ifdef __cplusplus
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}
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#endif
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#endif /* _ELF_H */
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