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 ___internal_ldrELFCommon_h
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28 | #define ___internal_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_AMD64 EM_X86_64 /* SunOS compatibility (added by Ramshankar) */
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142 | #define EM_ALPHA 0x9026 /* Alpha (written in the absence of an ABI */
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143 |
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144 | /* Special section indexes. */
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145 | #define SHN_UNDEF 0 /* Undefined, missing, irrelevant. */
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146 | #define SHN_LORESERVE 0xff00 /* First of reserved range. */
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147 | #define SHN_LOPROC 0xff00 /* First processor-specific. */
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148 | #define SHN_HIPROC 0xff1f /* Last processor-specific. */
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149 | #define SHN_ABS 0xfff1 /* Absolute values. */
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150 | #define SHN_COMMON 0xfff2 /* Common data. */
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151 | #define SHN_HIRESERVE 0xffff /* Last of reserved range. */
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152 |
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153 | /* sh_type */
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154 | #define SHT_NULL 0 /* inactive */
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155 | #define SHT_PROGBITS 1 /* program defined information */
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156 | #define SHT_SYMTAB 2 /* symbol table section */
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157 | #define SHT_STRTAB 3 /* string table section */
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158 | #define SHT_RELA 4 /* relocation section with addends */
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159 | #define SHT_HASH 5 /* symbol hash table section */
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160 | #define SHT_DYNAMIC 6 /* dynamic section */
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161 | #define SHT_NOTE 7 /* note section */
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162 | #define SHT_NOBITS 8 /* no space section */
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163 | #define SHT_REL 9 /* relocation section - no addends */
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164 | #define SHT_SHLIB 10 /* reserved - purpose unknown */
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165 | #define SHT_DYNSYM 11 /* dynamic symbol table section */
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166 | #define SHT_NUM 12 /* number of section types */
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167 | #define SHT_LOOS 0x60000000 /* First of OS specific semantics */
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168 | #define SHT_HIOS 0x6fffffff /* Last of OS specific semantics */
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169 | #define SHT_LOPROC 0x70000000 /* reserved range for processor */
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170 | #define SHT_HIPROC 0x7fffffff /* specific section header types */
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171 | #define SHT_LOUSER 0x80000000 /* reserved range for application */
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172 | #define SHT_HIUSER 0xffffffff /* specific indexes */
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173 |
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174 | /* Flags for sh_flags. */
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175 | #define SHF_WRITE 0x1 /* Section contains writable data. */
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176 | #define SHF_ALLOC 0x2 /* Section occupies memory. */
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177 | #define SHF_EXECINSTR 0x4 /* Section contains instructions. */
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178 | #define SHF_TLS 0x400 /* Section contains TLS data. */
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179 | #define SHF_MASKPROC 0xf0000000 /* Reserved for processor-specific. */
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180 |
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181 | /* Values for p_type. */
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182 | #define PT_NULL 0 /* Unused entry. */
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183 | #define PT_LOAD 1 /* Loadable segment. */
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184 | #define PT_DYNAMIC 2 /* Dynamic linking information segment. */
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185 | #define PT_INTERP 3 /* Pathname of interpreter. */
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186 | #define PT_NOTE 4 /* Auxiliary information. */
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187 | #define PT_SHLIB 5 /* Reserved (not used). */
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188 | #define PT_PHDR 6 /* Location of program header itself. */
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189 | #define PT_TLS 7 /* Thread local storage segment */
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190 |
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191 | #define PT_COUNT 8 /* Number of defined p_type values. */
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192 |
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193 | #define PT_LOOS 0x60000000 /* OS-specific */
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194 | #define PT_HIOS 0x6fffffff /* OS-specific */
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195 | #define PT_LOPROC 0x70000000 /* First processor-specific type. */
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196 | #define PT_HIPROC 0x7fffffff /* Last processor-specific type. */
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197 |
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198 | /* Values for p_flags. */
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199 | #define PF_X 0x1 /* Executable. */
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200 | #define PF_W 0x2 /* Writable. */
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201 | #define PF_R 0x4 /* Readable. */
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202 |
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203 | /* Values for d_tag. */
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204 | #define DT_NULL 0 /* Terminating entry. */
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205 | #define DT_NEEDED 1 /* String table offset of a needed shared
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206 | library. */
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207 | #define DT_PLTRELSZ 2 /* Total size in bytes of PLT relocations. */
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208 | #define DT_PLTGOT 3 /* Processor-dependent address. */
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209 | #define DT_HASH 4 /* Address of symbol hash table. */
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210 | #define DT_STRTAB 5 /* Address of string table. */
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211 | #define DT_SYMTAB 6 /* Address of symbol table. */
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212 | #define DT_RELA 7 /* Address of ElfNN_Rela relocations. */
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213 | #define DT_RELASZ 8 /* Total size of ElfNN_Rela relocations. */
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214 | #define DT_RELAENT 9 /* Size of each ElfNN_Rela relocation entry. */
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215 | #define DT_STRSZ 10 /* Size of string table. */
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216 | #define DT_SYMENT 11 /* Size of each symbol table entry. */
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217 | #define DT_INIT 12 /* Address of initialization function. */
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218 | #define DT_FINI 13 /* Address of finalization function. */
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219 | #define DT_SONAME 14 /* String table offset of shared object
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220 | name. */
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221 | #define DT_RPATH 15 /* String table offset of library path. [sup] */
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222 | #define DT_SYMBOLIC 16 /* Indicates "symbolic" linking. [sup] */
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223 | #define DT_REL 17 /* Address of ElfNN_Rel relocations. */
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224 | #define DT_RELSZ 18 /* Total size of ElfNN_Rel relocations. */
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225 | #define DT_RELENT 19 /* Size of each ElfNN_Rel relocation. */
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226 | #define DT_PLTREL 20 /* Type of relocation used for PLT. */
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227 | #define DT_DEBUG 21 /* Reserved (not used). */
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228 | #define DT_TEXTREL 22 /* Indicates there may be relocations in
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229 | non-writable segments. [sup] */
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230 | #define DT_JMPREL 23 /* Address of PLT relocations. */
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231 | #define DT_BIND_NOW 24 /* [sup] */
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232 | #define DT_INIT_ARRAY 25 /* Address of the array of pointers to
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233 | initialization functions */
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234 | #define DT_FINI_ARRAY 26 /* Address of the array of pointers to
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235 | termination functions */
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236 | #define DT_INIT_ARRAYSZ 27 /* Size in bytes of the array of
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237 | initialization functions. */
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238 | #define DT_FINI_ARRAYSZ 28 /* Size in bytes of the array of
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239 | terminationfunctions. */
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240 | #define DT_RUNPATH 29 /* String table offset of a null-terminated
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241 | library search path string. */
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242 | #define DT_FLAGS 30 /* Object specific flag values. */
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243 | #define DT_ENCODING 32 /* Values greater than or equal to DT_ENCODING
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244 | and less than DT_LOOS follow the rules for
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245 | the interpretation of the d_un union
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246 | as follows: even == 'd_ptr', even == 'd_val'
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247 | or none */
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248 | #define DT_PREINIT_ARRAY 32 /* Address of the array of pointers to
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249 | pre-initialization functions. */
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250 | #define DT_PREINIT_ARRAYSZ 33 /* Size in bytes of the array of
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251 | pre-initialization functions. */
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252 |
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253 | #define DT_COUNT 33 /* Number of defined d_tag values. */
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254 |
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255 | #define DT_LOOS 0x6000000d /* First OS-specific */
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256 | #define DT_HIOS 0x6fff0000 /* Last OS-specific */
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257 | #define DT_LOPROC 0x70000000 /* First processor-specific type. */
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258 | #define DT_HIPROC 0x7fffffff /* Last processor-specific type. */
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259 |
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260 | /* Values for DT_FLAGS */
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261 | #define DF_ORIGIN 0x0001 /* Indicates that the object being loaded may
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262 | make reference to the $ORIGIN substitution
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263 | string */
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264 | #define DF_SYMBOLIC 0x0002 /* Indicates "symbolic" linking. */
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265 | #define DF_TEXTREL 0x0004 /* Indicates there may be relocations in
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266 | non-writable segments. */
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267 | #define DF_BIND_NOW 0x0008 /* Indicates that the dynamic linker should
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268 | process all relocations for the object
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269 | containing this entry before transferring
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270 | control to the program. */
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271 | #define DF_STATIC_TLS 0x0010 /* Indicates that the shared object or
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272 | executable contains code using a static
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273 | thread-local storage scheme. */
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274 |
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275 | /* Values for n_type. Used in core files. */
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276 | #if defined(RT_OS_FREEBSD) /* (added by Ramshankar) */
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277 | #define NT_PRSTATUS 1 /* Process status. */
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278 | #define NT_FPREGSET 2 /* Floating point registers. */
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279 | #define NT_PRPSINFO 3 /* Process state info. */
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280 | #elif defined(RT_OS_SOLARIS) /* (added by Ramshankar) */
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281 | #define NT_PRSTATUS 1 /* prstatus_t <sys/old_procfs.h> */
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282 | #define NT_PRFPREG 2 /* prfpregset_t <sys/old_procfs.h> */
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283 | #define NT_PRPSINFO 3 /* prpsinfo_t <sys/old_procfs.h> */
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284 | #define NT_PRXREG 4 /* prxregset_t <sys/procfs.h> */
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285 | #define NT_PLATFORM 5 /* string from sysinfo(SI_PLATFORM) */
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286 | #define NT_AUXV 6 /* auxv_t array <sys/auxv.h> */
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287 | #define NT_LDT 9 /* ssd array <sys/sysi86.h> IA32 only */
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288 | #define NT_PSTATUS 10 /* pstatus_t <sys/procfs.h> */
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289 | #define NT_PSINFO 13 /* psinfo_t <sys/procfs.h> */
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290 | #define NT_PRCRED 14 /* prcred_t <sys/procfs.h> */
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291 | #define NT_UTSNAME 15 /* struct utsname <sys/utsname.h> */
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292 | #define NT_LWPSTATUS 16 /* lwpstatus_t <sys/procfs.h> */
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293 | #define NT_LWPSINFO 17 /* lwpsinfo_t <sys/procfs.h> */
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294 | #define NT_PRPRIV 18 /* prpriv_t <sys/procfs.h> */
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295 | #define NT_PRPRIVINFO 19 /* priv_impl_info_t <sys/priv.h> */
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296 | #define NT_CONTENT 20 /* core_content_t <sys/corectl.h> */
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297 | #define NT_ZONENAME 21 /* string from getzonenamebyid(3C) */
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298 | #define PF_SUNW_FAILURE 0x00100000 /* mapping absent due to failure */
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299 | #define PN_XNUM 0xffff /* extended program header index */
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300 | #elif defined(RT_OS_LINUX) /* (added by Ramshankar) */
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301 | #define NT_PRSTATUS 1 /* Process status. */
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302 | #define NT_PRFPREG 2 /* Floating point registers. */
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303 | #define NT_PRPSINFO 3 /* Process state info. */
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304 | #define NT_TASKSTRUCT 4 /* Task info. */
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305 | #define NT_AUXV 6 /* Process auxiliary vectors. */
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306 | #define NT_PRXFPREG 0x46e62b7f /* from gdb5.1/include/elf/common.h */
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307 | #endif
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308 |
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309 | /* VirtualBox specific NOTE sections (added by Ramshankar) */
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310 | #ifdef VBOX
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311 | #define NT_VBOXCORE 0xb00
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312 | #define NT_VBOXCPU 0xb01
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313 | #endif
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314 |
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315 | /* Symbol Binding - ELFNN_ST_BIND - st_info */
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316 | #define STB_LOCAL 0 /* Local symbol */
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317 | #define STB_GLOBAL 1 /* Global symbol */
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318 | #define STB_WEAK 2 /* like global - lower precedence */
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319 | #define STB_LOPROC 13 /* reserved range for processor */
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320 | #define STB_HIPROC 15 /* specific symbol bindings */
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321 |
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322 | /* Symbol type - ELFNN_ST_TYPE - st_info */
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323 | #define STT_NOTYPE 0 /* Unspecified type. */
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324 | #define STT_OBJECT 1 /* Data object. */
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325 | #define STT_FUNC 2 /* Function. */
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326 | #define STT_SECTION 3 /* Section. */
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327 | #define STT_FILE 4 /* Source file. */
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328 | #define STT_TLS 6 /* TLS object. */
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329 | #define STT_NUM 7 /* Number of generic symbol types. */
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330 | #define STT_LOPROC 13 /* reserved range for processor */
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331 | #define STT_HIPROC 15 /* specific symbol types */
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332 |
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333 | /* Special symbol table indexes. */
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334 | #define STN_UNDEF 0 /* Undefined symbol index. */
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335 |
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336 | #endif
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