| 1 | /*-
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| 2 | * Copyright (c) 1998 John D. Polstra.
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| 3 | * All rights reserved.
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| 4 | *
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| 5 | * Redistribution and use in source and binary forms, with or without
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| 6 | * modification, are permitted provided that the following conditions
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| 7 | * are met:
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| 8 | * 1. Redistributions of source code must retain the above copyright
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| 9 | * notice, this list of conditions and the following disclaimer.
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| 10 | * 2. Redistributions in binary form must reproduce the above copyright
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| 11 | * notice, this list of conditions and the following disclaimer in the
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| 12 | * documentation and/or other materials provided with the distribution.
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| 13 | *
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| 14 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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| 15 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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| 16 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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| 17 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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| 18 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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| 19 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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| 20 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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| 21 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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| 22 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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| 23 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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| 24 | * SUCH DAMAGE.
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| 25 | */
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| 26 |
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| 27 | #ifndef __ldrELFCommon_h__
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| 28 | #define __ldrELFCommon_h__
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| 29 |
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| 30 | #include <iprt/stdint.h>
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| 31 |
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| 32 | /*
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| 33 | * ELF definitions that are independent of architecture or word size.
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| 34 | */
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| 35 |
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| 36 | /*
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| 37 | * Note header. The ".note" section contains an array of notes. Each
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| 38 | * begins with this header, aligned to a word boundary. Immediately
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| 39 | * following the note header is n_namesz bytes of name, padded to the
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| 40 | * next word boundary. Then comes n_descsz bytes of descriptor, again
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| 41 | * padded to a word boundary. The values of n_namesz and n_descsz do
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| 42 | * not include the padding.
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| 43 | */
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| 44 |
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| 45 | typedef struct {
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| 46 | uint32_t n_namesz; /* Length of name. */
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| 47 | uint32_t n_descsz; /* Length of descriptor. */
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| 48 | uint32_t n_type; /* Type of this note. */
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| 49 | } Elf_Note;
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| 50 |
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| 51 | /* Indexes into the e_ident array. Keep synced with
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| 52 | http://www.sco.com/developer/gabi/ch4.eheader.html */
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| 53 | #define EI_MAG0 0 /* Magic number, byte 0. */
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| 54 | #define EI_MAG1 1 /* Magic number, byte 1. */
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| 55 | #define EI_MAG2 2 /* Magic number, byte 2. */
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| 56 | #define EI_MAG3 3 /* Magic number, byte 3. */
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| 57 | #define EI_CLASS 4 /* Class of machine. */
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| 58 | #define EI_DATA 5 /* Data format. */
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| 59 | #define EI_VERSION 6 /* ELF format version. */
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| 60 | #define EI_OSABI 7 /* Operating system / ABI identification */
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| 61 | #define EI_ABIVERSION 8 /* ABI version */
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| 62 | #define OLD_EI_BRAND 8 /* Start of architecture identification. */
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| 63 | #define EI_PAD 9 /* Start of padding (per SVR4 ABI). */
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| 64 | #define EI_NIDENT 16 /* Size of e_ident array. */
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| 65 |
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| 66 | /* Values for the magic number bytes. */
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| 67 | #define ELFMAG0 0x7f
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| 68 | #define ELFMAG1 'E'
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| 69 | #define ELFMAG2 'L'
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| 70 | #define ELFMAG3 'F'
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| 71 | #define ELFMAG "\177ELF" /* magic string */
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| 72 | #define SELFMAG 4 /* magic string size */
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| 73 |
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| 74 | /* Values for e_ident[EI_VERSION] and e_version. */
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| 75 | #define EV_NONE 0
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| 76 | #define EV_CURRENT 1
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| 77 |
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| 78 | /* Values for e_ident[EI_CLASS]. */
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| 79 | #define ELFCLASSNONE 0 /* Unknown class. */
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| 80 | #define ELFCLASS32 1 /* 32-bit architecture. */
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| 81 | #define ELFCLASS64 2 /* 64-bit architecture. */
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| 82 |
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| 83 | /* Values for e_ident[EI_DATA]. */
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| 84 | #define ELFDATANONE 0 /* Unknown data format. */
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| 85 | #define ELFDATA2LSB 1 /* 2's complement little-endian. */
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| 86 | #define ELFDATA2MSB 2 /* 2's complement big-endian. */
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| 87 |
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| 88 | /* Values for e_ident[EI_OSABI]. */
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| 89 | #define ELFOSABI_SYSV 0 /* UNIX System V ABI */
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| 90 | #define ELFOSABI_NONE ELFOSABI_SYSV /* symbol used in old spec */
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| 91 | #define ELFOSABI_HPUX 1 /* HP-UX operating system */
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| 92 | #define ELFOSABI_NETBSD 2 /* NetBSD */
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| 93 | #define ELFOSABI_LINUX 3 /* GNU/Linux */
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| 94 | #define ELFOSABI_HURD 4 /* GNU/Hurd */
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| 95 | #define ELFOSABI_86OPEN 5 /* 86Open common IA32 ABI */
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| 96 | #define ELFOSABI_SOLARIS 6 /* Solaris */
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| 97 | #define ELFOSABI_MONTEREY 7 /* Monterey */
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| 98 | #define ELFOSABI_IRIX 8 /* IRIX */
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| 99 | #define ELFOSABI_FREEBSD 9 /* FreeBSD */
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| 100 | #define ELFOSABI_TRU64 10 /* TRU64 UNIX */
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| 101 | #define ELFOSABI_MODESTO 11 /* Novell Modesto */
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| 102 | #define ELFOSABI_OPENBSD 12 /* OpenBSD */
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| 103 | #define ELFOSABI_ARM 97 /* ARM */
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| 104 | #define ELFOSABI_STANDALONE 255 /* Standalone (embedded) application */
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| 105 |
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| 106 | /* e_ident */
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| 107 | #define IS_ELF(ehdr) ((ehdr).e_ident[EI_MAG0] == ELFMAG0 && \
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| 108 | (ehdr).e_ident[EI_MAG1] == ELFMAG1 && \
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| 109 | (ehdr).e_ident[EI_MAG2] == ELFMAG2 && \
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| 110 | (ehdr).e_ident[EI_MAG3] == ELFMAG3)
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| 111 |
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| 112 | /* Values for e_type. */
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| 113 | #define ET_NONE 0 /* Unknown type. */
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| 114 | #define ET_REL 1 /* Relocatable. */
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| 115 | #define ET_EXEC 2 /* Executable. */
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| 116 | #define ET_DYN 3 /* Shared object. */
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| 117 | #define ET_CORE 4 /* Core file. */
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| 118 |
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| 119 | /* Values for e_machine. */
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| 120 | #define EM_NONE 0 /* Unknown machine. */
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| 121 | #define EM_M32 1 /* AT&T WE32100. */
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| 122 | #define EM_SPARC 2 /* Sun SPARC. */
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| 123 | #define EM_386 3 /* Intel i386. */
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| 124 | #define EM_68K 4 /* Motorola 68000. */
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| 125 | #define EM_88K 5 /* Motorola 88000. */
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| 126 | #define EM_486 6 /* Intel i486. */
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| 127 | #define EM_860 7 /* Intel i860. */
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| 128 | #define EM_MIPS 8 /* MIPS R3000 Big-Endian only */
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| 129 |
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| 130 | /* Extensions. This list is not complete. */
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| 131 | #define EM_S370 9 /* IBM System/370 */
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| 132 | #define EM_MIPS_RS4_BE 10 /* MIPS R4000 Big-Endian */ /* Depreciated */
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| 133 | #define EM_PARISC 15 /* HPPA */
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| 134 | #define EM_SPARC32PLUS 18 /* SPARC v8plus */
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| 135 | #define EM_PPC 20 /* PowerPC 32-bit */
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| 136 | #define EM_PPC64 21 /* PowerPC 64-bit */
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| 137 | #define EM_ARM 40 /* ARM */
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| 138 | #define EM_SPARCV9 43 /* SPARC v9 64-bit */
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| 139 | #define EM_IA_64 50 /* Intel IA-64 Processor */
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| 140 | #define EM_X86_64 62 /* Advanced Micro Devices x86-64 */
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| 141 | #define EM_ALPHA 0x9026 /* Alpha (written in the absence of an ABI */
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| 142 |
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| 143 | /* Special section indexes. */
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| 144 | #define SHN_UNDEF 0 /* Undefined, missing, irrelevant. */
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| 145 | #define SHN_LORESERVE 0xff00 /* First of reserved range. */
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| 146 | #define SHN_LOPROC 0xff00 /* First processor-specific. */
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| 147 | #define SHN_HIPROC 0xff1f /* Last processor-specific. */
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| 148 | #define SHN_ABS 0xfff1 /* Absolute values. */
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| 149 | #define SHN_COMMON 0xfff2 /* Common data. */
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| 150 | #define SHN_HIRESERVE 0xffff /* Last of reserved range. */
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| 151 |
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| 152 | /* sh_type */
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| 153 | #define SHT_NULL 0 /* inactive */
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| 154 | #define SHT_PROGBITS 1 /* program defined information */
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| 155 | #define SHT_SYMTAB 2 /* symbol table section */
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| 156 | #define SHT_STRTAB 3 /* string table section */
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| 157 | #define SHT_RELA 4 /* relocation section with addends */
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| 158 | #define SHT_HASH 5 /* symbol hash table section */
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| 159 | #define SHT_DYNAMIC 6 /* dynamic section */
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| 160 | #define SHT_NOTE 7 /* note section */
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| 161 | #define SHT_NOBITS 8 /* no space section */
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| 162 | #define SHT_REL 9 /* relocation section - no addends */
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| 163 | #define SHT_SHLIB 10 /* reserved - purpose unknown */
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| 164 | #define SHT_DYNSYM 11 /* dynamic symbol table section */
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| 165 | #define SHT_NUM 12 /* number of section types */
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| 166 | #define SHT_LOOS 0x60000000 /* First of OS specific semantics */
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| 167 | #define SHT_HIOS 0x6fffffff /* Last of OS specific semantics */
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| 168 | #define SHT_LOPROC 0x70000000 /* reserved range for processor */
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| 169 | #define SHT_HIPROC 0x7fffffff /* specific section header types */
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| 170 | #define SHT_LOUSER 0x80000000 /* reserved range for application */
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| 171 | #define SHT_HIUSER 0xffffffff /* specific indexes */
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| 172 |
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| 173 | /* Flags for sh_flags. */
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| 174 | #define SHF_WRITE 0x1 /* Section contains writable data. */
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| 175 | #define SHF_ALLOC 0x2 /* Section occupies memory. */
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| 176 | #define SHF_EXECINSTR 0x4 /* Section contains instructions. */
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| 177 | #define SHF_TLS 0x400 /* Section contains TLS data. */
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| 178 | #define SHF_MASKPROC 0xf0000000 /* Reserved for processor-specific. */
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| 179 |
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| 180 | /* Values for p_type. */
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| 181 | #define PT_NULL 0 /* Unused entry. */
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| 182 | #define PT_LOAD 1 /* Loadable segment. */
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| 183 | #define PT_DYNAMIC 2 /* Dynamic linking information segment. */
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| 184 | #define PT_INTERP 3 /* Pathname of interpreter. */
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| 185 | #define PT_NOTE 4 /* Auxiliary information. */
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| 186 | #define PT_SHLIB 5 /* Reserved (not used). */
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| 187 | #define PT_PHDR 6 /* Location of program header itself. */
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| 188 | #define PT_TLS 7 /* Thread local storage segment */
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| 189 |
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| 190 | #define PT_COUNT 8 /* Number of defined p_type values. */
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| 191 |
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| 192 | #define PT_LOOS 0x60000000 /* OS-specific */
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| 193 | #define PT_HIOS 0x6fffffff /* OS-specific */
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| 194 | #define PT_LOPROC 0x70000000 /* First processor-specific type. */
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| 195 | #define PT_HIPROC 0x7fffffff /* Last processor-specific type. */
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| 196 |
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| 197 | /* Values for p_flags. */
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| 198 | #define PF_X 0x1 /* Executable. */
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| 199 | #define PF_W 0x2 /* Writable. */
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| 200 | #define PF_R 0x4 /* Readable. */
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| 201 |
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| 202 | /* Values for d_tag. */
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| 203 | #define DT_NULL 0 /* Terminating entry. */
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| 204 | #define DT_NEEDED 1 /* String table offset of a needed shared
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| 205 | library. */
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| 206 | #define DT_PLTRELSZ 2 /* Total size in bytes of PLT relocations. */
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| 207 | #define DT_PLTGOT 3 /* Processor-dependent address. */
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| 208 | #define DT_HASH 4 /* Address of symbol hash table. */
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| 209 | #define DT_STRTAB 5 /* Address of string table. */
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| 210 | #define DT_SYMTAB 6 /* Address of symbol table. */
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| 211 | #define DT_RELA 7 /* Address of ElfNN_Rela relocations. */
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| 212 | #define DT_RELASZ 8 /* Total size of ElfNN_Rela relocations. */
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| 213 | #define DT_RELAENT 9 /* Size of each ElfNN_Rela relocation entry. */
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| 214 | #define DT_STRSZ 10 /* Size of string table. */
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| 215 | #define DT_SYMENT 11 /* Size of each symbol table entry. */
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| 216 | #define DT_INIT 12 /* Address of initialization function. */
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| 217 | #define DT_FINI 13 /* Address of finalization function. */
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| 218 | #define DT_SONAME 14 /* String table offset of shared object
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| 219 | name. */
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| 220 | #define DT_RPATH 15 /* String table offset of library path. [sup] */
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| 221 | #define DT_SYMBOLIC 16 /* Indicates "symbolic" linking. [sup] */
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| 222 | #define DT_REL 17 /* Address of ElfNN_Rel relocations. */
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| 223 | #define DT_RELSZ 18 /* Total size of ElfNN_Rel relocations. */
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| 224 | #define DT_RELENT 19 /* Size of each ElfNN_Rel relocation. */
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| 225 | #define DT_PLTREL 20 /* Type of relocation used for PLT. */
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| 226 | #define DT_DEBUG 21 /* Reserved (not used). */
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| 227 | #define DT_TEXTREL 22 /* Indicates there may be relocations in
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| 228 | non-writable segments. [sup] */
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| 229 | #define DT_JMPREL 23 /* Address of PLT relocations. */
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| 230 | #define DT_BIND_NOW 24 /* [sup] */
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| 231 | #define DT_INIT_ARRAY 25 /* Address of the array of pointers to
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| 232 | initialization functions */
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| 233 | #define DT_FINI_ARRAY 26 /* Address of the array of pointers to
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| 234 | termination functions */
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| 235 | #define DT_INIT_ARRAYSZ 27 /* Size in bytes of the array of
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| 236 | initialization functions. */
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| 237 | #define DT_FINI_ARRAYSZ 28 /* Size in bytes of the array of
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| 238 | terminationfunctions. */
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| 239 | #define DT_RUNPATH 29 /* String table offset of a null-terminated
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| 240 | library search path string. */
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| 241 | #define DT_FLAGS 30 /* Object specific flag values. */
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| 242 | #define DT_ENCODING 32 /* Values greater than or equal to DT_ENCODING
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| 243 | and less than DT_LOOS follow the rules for
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| 244 | the interpretation of the d_un union
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| 245 | as follows: even == 'd_ptr', even == 'd_val'
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| 246 | or none */
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| 247 | #define DT_PREINIT_ARRAY 32 /* Address of the array of pointers to
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| 248 | pre-initialization functions. */
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| 249 | #define DT_PREINIT_ARRAYSZ 33 /* Size in bytes of the array of
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| 250 | pre-initialization functions. */
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| 251 |
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| 252 | #define DT_COUNT 33 /* Number of defined d_tag values. */
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| 253 |
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| 254 | #define DT_LOOS 0x6000000d /* First OS-specific */
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| 255 | #define DT_HIOS 0x6fff0000 /* Last OS-specific */
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| 256 | #define DT_LOPROC 0x70000000 /* First processor-specific type. */
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| 257 | #define DT_HIPROC 0x7fffffff /* Last processor-specific type. */
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| 258 |
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| 259 | /* Values for DT_FLAGS */
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| 260 | #define DF_ORIGIN 0x0001 /* Indicates that the object being loaded may
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| 261 | make reference to the $ORIGIN substitution
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| 262 | string */
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| 263 | #define DF_SYMBOLIC 0x0002 /* Indicates "symbolic" linking. */
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| 264 | #define DF_TEXTREL 0x0004 /* Indicates there may be relocations in
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| 265 | non-writable segments. */
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| 266 | #define DF_BIND_NOW 0x0008 /* Indicates that the dynamic linker should
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| 267 | process all relocations for the object
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| 268 | containing this entry before transferring
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| 269 | control to the program. */
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| 270 | #define DF_STATIC_TLS 0x0010 /* Indicates that the shared object or
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| 271 | executable contains code using a static
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| 272 | thread-local storage scheme. */
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| 273 |
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| 274 | /* Values for n_type. Used in core files. */
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| 275 | #define NT_PRSTATUS 1 /* Process status. */
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| 276 | #define NT_FPREGSET 2 /* Floating point registers. */
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| 277 | #define NT_PRPSINFO 3 /* Process state info. */
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| 278 |
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| 279 | /* Symbol Binding - ELFNN_ST_BIND - st_info */
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| 280 | #define STB_LOCAL 0 /* Local symbol */
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| 281 | #define STB_GLOBAL 1 /* Global symbol */
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| 282 | #define STB_WEAK 2 /* like global - lower precedence */
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| 283 | #define STB_LOPROC 13 /* reserved range for processor */
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| 284 | #define STB_HIPROC 15 /* specific symbol bindings */
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| 285 |
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| 286 | /* Symbol type - ELFNN_ST_TYPE - st_info */
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| 287 | #define STT_NOTYPE 0 /* Unspecified type. */
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| 288 | #define STT_OBJECT 1 /* Data object. */
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| 289 | #define STT_FUNC 2 /* Function. */
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| 290 | #define STT_SECTION 3 /* Section. */
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| 291 | #define STT_FILE 4 /* Source file. */
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| 292 | #define STT_TLS 6 /* TLS object. */
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| 293 | #define STT_LOPROC 13 /* reserved range for processor */
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| 294 | #define STT_HIPROC 15 /* specific symbol types */
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| 295 |
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| 296 | /* Special symbol table indexes. */
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| 297 | #define STN_UNDEF 0 /* Undefined symbol index. */
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| 298 |
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| 299 | #endif
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