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Diffstat (limited to 'include/iprt/formats/elf64.h')
| -rw-r--r-- | include/iprt/formats/elf64.h | 199 |
1 files changed, 199 insertions, 0 deletions
diff --git a/include/iprt/formats/elf64.h b/include/iprt/formats/elf64.h new file mode 100644 index 00000000..63d4b1cb --- /dev/null +++ b/include/iprt/formats/elf64.h @@ -0,0 +1,199 @@ +/* $Id: elf64.h $ */ +/** @file + * IPRT - ELF 64-bit header. + */ + +/* + * Copyright (C) 2010-2022 Oracle and/or its affiliates. + * + * This file is part of VirtualBox base platform packages, as + * available from https://www.virtualbox.org. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation, in version 3 of the + * License. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, see <https://www.gnu.org/licenses>. + * + * The contents of this file may alternatively be used under the terms + * of the Common Development and Distribution License Version 1.0 + * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included + * in the VirtualBox distribution, in which case the provisions of the + * CDDL are applicable instead of those of the GPL. + * + * You may elect to license modified versions of this file under the + * terms and conditions of either the GPL or the CDDL or both. + * + * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0 + */ + +#ifndef IPRT_INCLUDED_formats_elf64_h +#define IPRT_INCLUDED_formats_elf64_h +#ifndef RT_WITHOUT_PRAGMA_ONCE +# pragma once +#endif + +#include <iprt/assertcompile.h> +#include "elf-common.h" + +/* + * ELF 64 standard types. + */ +typedef uint64_t Elf64_Addr; +typedef uint64_t Elf64_Off; +typedef uint16_t Elf64_Half; +typedef uint32_t Elf64_Word; +typedef int32_t Elf64_Sword; +typedef uint64_t Elf64_Xword; +typedef int64_t Elf64_Sxword; + +/* + * Ensure type size correctness in accordance to ELF-64 Object File Format, Version 1.5 Draft 2, p2. + */ +AssertCompileSize(Elf64_Addr, 8); +AssertCompileSize(Elf64_Off, 8); +AssertCompileSize(Elf64_Half, 2); +AssertCompileSize(Elf64_Word, 4); +AssertCompileSize(Elf64_Sword, 4); +AssertCompileSize(Elf64_Xword, 8); +AssertCompileSize(Elf64_Sxword, 8); + +/* + * ELF 64 non-standard types for convenience. + */ +typedef Elf64_Xword Elf64_Size; +typedef Elf64_Word Elf64_Hashelt; + +/* + * ELF Header. + */ +typedef struct +{ + unsigned char e_ident[16]; /* ELF identification. */ + Elf64_Half e_type; /* Object file type. */ + Elf64_Half e_machine; /* Machine type. */ + Elf64_Word e_version; /* Object file version. */ + Elf64_Addr e_entry; /* Entry point address. */ + Elf64_Off e_phoff; /* Program header offset. */ + Elf64_Off e_shoff; /* Section header offset. */ + Elf64_Word e_flags; /* Processor-specific flags. */ + Elf64_Half e_ehsize; /* ELF header size. */ + Elf64_Half e_phentsize; /* Size of program header entry. */ + Elf64_Half e_phnum; /* Number of program header entries. */ + Elf64_Half e_shentsize; /* Size of section header entry. */ + Elf64_Half e_shnum; /* Number of section header entries. */ + Elf64_Half e_shstrndx; /* Section name string table index. */ +} Elf64_Ehdr; + +/* + * Section header. + */ +typedef struct +{ + Elf64_Word sh_name; /* Section name. */ + Elf64_Word sh_type; /* Section type. */ + Elf64_Xword sh_flags; /* Section attributes. */ + Elf64_Addr sh_addr; /* Virtual address in memory. */ + Elf64_Off sh_offset; /* Offset in file. */ + Elf64_Xword sh_size; /* Size of section. */ + Elf64_Word sh_link; /* Link to other section. */ + Elf64_Word sh_info; /* Miscellaneous information. */ + Elf64_Xword sh_addralign; /* Address alignment boundary. */ + Elf64_Xword sh_entsize; /* Size of entries, if section has table. */ +} Elf64_Shdr; + +/* + * Program header. + */ +typedef struct +{ + Elf64_Word p_type; /* Type of segment. */ + Elf64_Word p_flags; /* Segment attributes. */ + Elf64_Off p_offset; /* Offset in file. */ + Elf64_Addr p_vaddr; /* Virtual address in memory. */ + Elf64_Addr p_paddr; /* Physical address (reserved). */ + Elf64_Xword p_filesz; /* Size of segment in file. */ + Elf64_Xword p_memsz; /* Size of segment in memory. */ + Elf64_Xword p_align; /* Alignment of segment. */ +} Elf64_Phdr; + +/* + * Note header. + */ +typedef struct +{ + Elf64_Word n_namesz; /* Length of note's name. */ + Elf64_Word n_descsz; /* Length of note's description. */ + Elf64_Word n_type; /* Type of note. */ +} Elf64_Nhdr; + +/* + * Symbol table entry. + */ +typedef struct +{ + Elf64_Word st_name; /* Symbol name. */ + unsigned char st_info; /* Type and binding attributes. */ + unsigned char st_other; /* Reserved. */ + Elf64_Half st_shndx; /* Section header table index. */ + Elf64_Addr st_value; /* Symbol value. */ + Elf64_Xword st_size; /* Size associated with symbol. */ +} Elf64_Sym; + +/* + * Relocations. + */ +typedef struct +{ + Elf64_Addr r_offset; /* Location to be relocated. */ + Elf64_Xword r_info; /* Symbol index and type of relocation. */ +} Elf64_Rel; + +typedef struct +{ + Elf64_Addr r_offset; /* Location to be relocated. */ + Elf64_Xword r_info; /* Symbol index and type of relocation. */ + Elf64_Sxword r_addend; /* Constant part of expression. */ +} Elf64_Rela; + +/* + * Dynamic section entry. + * ".dynamic" section contains an array of this. + */ +typedef struct +{ + Elf64_Sxword d_tag; /* Type of entry. */ + union + { + Elf64_Xword d_val; /* Integer value. */ + Elf64_Addr d_ptr; /* Virtual address value. */ + } d_un; +} Elf64_Dyn; + +/* + * Helper macros. + */ +/** The symbol's type. */ +#define ELF64_ST_TYPE(info) ((info) & 0xF) +/** The symbol's binding. */ +#define ELF64_ST_BIND(info) ((info) >> 4) +/** Make st_info. given binding and type. */ +#define ELF64_ST_INFO(bind, type) (((bind) << 4) + ((type) & 0xf)) + +/** Relocation type. */ +#define ELF64_R_TYPE(info) ((unsigned char)(info)) +/** Relocation symbol index. */ +#define ELF64_R_SYM(info) ((info) >> 32) +/** Make r_info given the symbol index and type. */ +#define ELF64_R_INFO(sym, type) (((sym) << 32) + (unsigned char)(type)) + + +#endif /* !IPRT_INCLUDED_formats_elf64_h */ + |