| 1 | /* $Id: elf64.h 76585 2019-01-01 06:31:29Z vboxsync $ */
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| 2 | /** @file
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| 3 | * IPRT - ELF 64-bit header.
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Copyright (C) 2010-2019 Oracle Corporation
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| 8 | *
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| 9 | * This file is part of VirtualBox Open Source Edition (OSE), as
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| 10 | * available from http://www.virtualbox.org. This file is free software;
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| 11 | * you can redistribute it and/or modify it under the terms of the GNU
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| 12 | * General Public License (GPL) as published by the Free Software
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| 13 | * Foundation, in version 2 as it comes in the "COPYING" file of the
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| 14 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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| 15 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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| 16 | *
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| 17 | * The contents of this file may alternatively be used under the terms
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| 18 | * of the Common Development and Distribution License Version 1.0
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| 19 | * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
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| 20 | * VirtualBox OSE distribution, in which case the provisions of the
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| 21 | * CDDL are applicable instead of those of the GPL.
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| 22 | *
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| 23 | * You may elect to license modified versions of this file under the
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| 24 | * terms and conditions of either the GPL or the CDDL or both.
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| 25 | */
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| 26 |
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| 27 | #ifndef IPRT_INCLUDED_formats_elf64_h
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| 28 | #define IPRT_INCLUDED_formats_elf64_h
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| 29 | #ifndef RT_WITHOUT_PRAGMA_ONCE
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| 30 | # pragma once
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| 31 | #endif
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| 32 |
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| 33 | #include <iprt/assertcompile.h>
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| 34 | #include "elf-common.h"
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| 35 |
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| 36 | /*
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| 37 | * ELF 64 standard types.
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| 38 | */
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| 39 | typedef uint64_t Elf64_Addr;
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| 40 | typedef uint64_t Elf64_Off;
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| 41 | typedef uint16_t Elf64_Half;
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| 42 | typedef uint32_t Elf64_Word;
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| 43 | typedef int32_t Elf64_Sword;
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| 44 | typedef uint64_t Elf64_Xword;
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| 45 | typedef int64_t Elf64_Sxword;
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| 46 |
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| 47 | /*
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| 48 | * Ensure type size correctness in accordance to ELF-64 Object File Format, Version 1.5 Draft 2, p2.
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| 49 | */
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| 50 | AssertCompileSize(Elf64_Addr, 8);
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| 51 | AssertCompileSize(Elf64_Off, 8);
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| 52 | AssertCompileSize(Elf64_Half, 2);
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| 53 | AssertCompileSize(Elf64_Word, 4);
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| 54 | AssertCompileSize(Elf64_Sword, 4);
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| 55 | AssertCompileSize(Elf64_Xword, 8);
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| 56 | AssertCompileSize(Elf64_Sxword, 8);
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| 57 |
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| 58 | /*
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| 59 | * ELF 64 non-standard types for convenience.
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| 60 | */
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| 61 | typedef Elf64_Xword Elf64_Size;
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| 62 | typedef Elf64_Word Elf64_Hashelt;
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| 63 |
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| 64 | /*
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| 65 | * ELF Header.
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| 66 | */
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| 67 | typedef struct
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| 68 | {
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| 69 | unsigned char e_ident[16]; /* ELF identification. */
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| 70 | Elf64_Half e_type; /* Object file type. */
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| 71 | Elf64_Half e_machine; /* Machine type. */
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| 72 | Elf64_Word e_version; /* Object file version. */
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| 73 | Elf64_Addr e_entry; /* Entry point address. */
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| 74 | Elf64_Off e_phoff; /* Program header offset. */
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| 75 | Elf64_Off e_shoff; /* Section header offset. */
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| 76 | Elf64_Word e_flags; /* Processor-specific flags. */
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| 77 | Elf64_Half e_ehsize; /* ELF header size. */
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| 78 | Elf64_Half e_phentsize; /* Size of program header entry. */
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| 79 | Elf64_Half e_phnum; /* Number of program header entries. */
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| 80 | Elf64_Half e_shentsize; /* Size of section header entry. */
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| 81 | Elf64_Half e_shnum; /* Number of section header entries. */
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| 82 | Elf64_Half e_shstrndx; /* Section name string table index. */
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| 83 | } Elf64_Ehdr;
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| 84 |
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| 85 | /*
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| 86 | * Section header.
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| 87 | */
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| 88 | typedef struct
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| 89 | {
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| 90 | Elf64_Word sh_name; /* Section name. */
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| 91 | Elf64_Word sh_type; /* Section type. */
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| 92 | Elf64_Xword sh_flags; /* Section attributes. */
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| 93 | Elf64_Addr sh_addr; /* Virtual address in memory. */
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| 94 | Elf64_Off sh_offset; /* Offset in file. */
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| 95 | Elf64_Xword sh_size; /* Size of section. */
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| 96 | Elf64_Word sh_link; /* Link to other section. */
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| 97 | Elf64_Word sh_info; /* Miscellaneous information. */
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| 98 | Elf64_Xword sh_addralign; /* Address alignment boundary. */
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| 99 | Elf64_Xword sh_entsize; /* Size of entries, if section has table. */
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| 100 | } Elf64_Shdr;
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| 101 |
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| 102 | /*
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| 103 | * Program header.
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| 104 | */
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| 105 | typedef struct
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| 106 | {
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| 107 | Elf64_Word p_type; /* Type of segment. */
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| 108 | Elf64_Word p_flags; /* Segment attributes. */
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| 109 | Elf64_Off p_offset; /* Offset in file. */
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| 110 | Elf64_Addr p_vaddr; /* Virtual address in memory. */
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| 111 | Elf64_Addr p_paddr; /* Physical address (reserved). */
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| 112 | Elf64_Xword p_filesz; /* Size of segment in file. */
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| 113 | Elf64_Xword p_memsz; /* Size of segment in memory. */
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| 114 | Elf64_Xword p_align; /* Alignment of segment. */
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| 115 | } Elf64_Phdr;
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| 116 |
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| 117 | /*
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| 118 | * Note header.
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| 119 | */
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| 120 | typedef struct
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| 121 | {
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| 122 | Elf64_Word n_namesz; /* Length of note's name. */
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| 123 | Elf64_Word n_descsz; /* Length of note's description. */
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| 124 | Elf64_Word n_type; /* Type of note. */
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| 125 | } Elf64_Nhdr;
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| 126 |
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| 127 | /*
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| 128 | * Symbol table entry.
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| 129 | */
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| 130 | typedef struct
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| 131 | {
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| 132 | Elf64_Word st_name; /* Symbol name. */
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| 133 | unsigned char st_info; /* Type and binding attributes. */
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| 134 | unsigned char st_other; /* Reserved. */
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| 135 | Elf64_Half st_shndx; /* Section header table index. */
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| 136 | Elf64_Addr st_value; /* Symbol value. */
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| 137 | Elf64_Xword st_size; /* Size associated with symbol. */
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| 138 | } Elf64_Sym;
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| 139 |
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| 140 | /*
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| 141 | * Relocations.
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| 142 | */
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| 143 | typedef struct
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| 144 | {
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| 145 | Elf64_Addr r_offset; /* Location to be relocated. */
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| 146 | Elf64_Xword r_info; /* Symbol index and type of relocation. */
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| 147 | } Elf64_Rel;
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| 148 |
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| 149 | typedef struct
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| 150 | {
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| 151 | Elf64_Addr r_offset; /* Location to be relocated. */
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| 152 | Elf64_Xword r_info; /* Symbol index and type of relocation. */
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| 153 | Elf64_Sxword r_addend; /* Constant part of expression. */
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| 154 | } Elf64_Rela;
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| 155 |
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| 156 | /*
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| 157 | * Dynamic section entry.
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| 158 | * ".dynamic" section contains an array of this.
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| 159 | */
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| 160 | typedef struct
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| 161 | {
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| 162 | Elf64_Sxword d_tag; /* Type of entry. */
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| 163 | union
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| 164 | {
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| 165 | Elf64_Xword d_val; /* Integer value. */
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| 166 | Elf64_Addr d_ptr; /* Virtual address value. */
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| 167 | } d_un;
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| 168 | } Elf64_Dyn;
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| 169 |
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| 170 | /*
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| 171 | * Helper macros.
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| 172 | */
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| 173 | /** The symbol's type. */
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| 174 | #define ELF64_ST_TYPE(info) ((info) & 0xF)
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| 175 | /** The symbol's binding. */
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| 176 | #define ELF64_ST_BIND(info) ((info) >> 4)
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| 177 | /** Make st_info. given binding and type. */
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| 178 | #define ELF64_ST_INFO(bind, type) (((bind) << 4) + ((type) & 0xf))
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| 179 |
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| 180 | /** Relocation type. */
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| 181 | #define ELF64_R_TYPE(info) ((unsigned char)(info))
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| 182 | /** Relocation symbol index. */
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| 183 | #define ELF64_R_SYM(info) ((info) >> 32)
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| 184 | /** Make r_info given the symbol index and type. */
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| 185 | #define ELF64_R_INFO(sym, type) (((sym) << 32) + (unsigned char)(type))
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| 186 |
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| 187 |
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| 188 | #endif /* !IPRT_INCLUDED_formats_elf64_h */
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| 189 |
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