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854 | bondari | 1 | /* |
2 | * Copyright (C) 2006 Sergey Bondari |
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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 | * |
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9 | * - Redistributions of source code must retain the above copyright |
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10 | * notice, this list of conditions and the following disclaimer. |
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11 | * - Redistributions in binary form must reproduce the above copyright |
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12 | * notice, this list of conditions and the following disclaimer in the |
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13 | * documentation and/or other materials provided with the distribution. |
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14 | * - The name of the author may not be used to endorse or promote products |
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15 | * derived from this software without specific prior written permission. |
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16 | * |
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17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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27 | */ |
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28 | |||
29 | #ifndef __ELF32_H__ |
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30 | #define __ELF32_H__ |
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31 | |||
32 | #include <arch/types.h> |
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33 | #include <mm/as.h> |
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34 | |||
35 | /** |
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36 | * current ELF version |
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37 | */ |
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38 | #define EV_CURRENT 1 |
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39 | |||
40 | /** |
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41 | * ELF types |
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42 | */ |
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43 | #define ET_NONE 0 // No type |
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44 | #define ET_REL 1 // Relocatable file |
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45 | #define ET_EXEC 2 // Executable |
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46 | #define ET_DYN 3 // Shared object |
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47 | #define ET_CORE 4 // Core |
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48 | #define ET_LOPROC 0xff00 // Processor specific |
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49 | #define ET_HIPROC 0xffff // Processor specific |
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50 | |||
51 | /** |
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52 | * ELF machine types |
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53 | */ |
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54 | #define EM_NO 0 // No machine |
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55 | #define EM_M32 1 // AT&T WE 32100 |
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56 | #define EM_SPARC 2 // SPARC |
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57 | #define EM_386 3 // i386 |
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58 | #define EM_68K 4 // Motorola 68000 |
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59 | #define EM_88K 5 // Motorola 88000 |
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60 | #define EM_860 7 // i80860 |
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61 | #define EM_MIPS 8 // MIPS RS3000 |
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62 | |||
63 | /** |
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64 | * ELF identification indexes |
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65 | */ |
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66 | #define EI_MAG0 0 |
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67 | #define EI_MAG1 1 |
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68 | #define EI_MAG2 2 |
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69 | #define EI_MAG3 3 |
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70 | #define EI_CLASS 4 // File class |
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71 | #define EI_DATA 5 // Data encoding |
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72 | #define EI_VERSION 6 // File version |
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73 | #define EI_PAD 7 // Start of padding bytes |
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74 | #define EI_NIDENT 16 // ELF identification table size |
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75 | |||
76 | /** |
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77 | * ELF magic number |
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78 | */ |
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79 | #define ELFMAG0 0x7f |
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80 | #define ELFMAG1 'E' |
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81 | #define ELFMAG2 'L' |
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82 | #define ELFMAG3 'F' |
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83 | |||
84 | /** |
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85 | * ELF file classes |
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86 | */ |
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87 | #define ELFCLASSNONE 0 |
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88 | #define ELFCLASS32 1 |
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89 | #define ELFCLASS64 2 |
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90 | |||
91 | /** |
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92 | * ELF data encoding types |
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93 | */ |
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94 | #define ELFDATANONE 0 |
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95 | #define ELFDATA2LSB 1 // Least significant byte first (little endian) |
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96 | #define ELFDATA2MSB 2 // Most signigicant byte first (Big endian) |
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97 | |||
98 | /** |
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99 | * ELF error return codes |
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100 | */ |
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101 | #define EE_OK 0 // No error |
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102 | #define EE_INVALID 1 // invalid ELF image |
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103 | #define EE_MEMORY 2 // cannot allocate address space |
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104 | #define EE_INCOMPATIBLE 3 // ELF image is not compatible with current architecture |
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105 | #define EE_UNSUPPORTED 4 // Non-supported ELF (e.g. dynamic ELFs) |
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106 | |||
107 | |||
855 | bondari | 108 | /** |
109 | * ELF section types |
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110 | */ |
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111 | #define SHT_NULL 0 |
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112 | #define SHT_PROGBITS 1 |
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113 | #define SHT_SYMTAB 2 |
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114 | #define SHT_STRTAB 3 |
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115 | #define SHT_RELA 4 |
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116 | #define SHT_HASH 5 |
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117 | #define SHT_DYNAMIC 6 |
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118 | #define SHT_NOTE 7 |
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119 | #define SHT_NOBITS 8 |
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120 | #define SHT_REL 9 |
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121 | #define SHT_SHLIB 10 |
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122 | #define SHT_DYNSYM 11 |
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123 | #define SHT_LOPROC 0x70000000 |
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124 | #define SHT_HIPROC 0x7fffffff |
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125 | #define SHT_LOUSER 0x80000000 |
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126 | #define SHT_HIUSER 0xffffffff |
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127 | |||
128 | /** |
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129 | * ELF section flags |
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130 | */ |
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131 | #define SHF_WRITE 0x1 |
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132 | #define SHF_ALLOC 0x2 |
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133 | #define SHF_EXECINSTR 0x4 |
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134 | #define SHF_MASKPROC 0xf0000000 |
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135 | |||
136 | /** |
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854 | bondari | 137 | * 32-bit ELF data types |
138 | */ |
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139 | typedef __u32 elf32_addr; |
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140 | typedef __u16 elf32_half; |
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141 | typedef __u32 elf32_off; |
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142 | typedef int elf32_sword; |
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143 | typedef __u32 elf32_word; |
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144 | |||
855 | bondari | 145 | /** |
854 | bondari | 146 | * 32-bit ELF header |
147 | */ |
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148 | struct elf32_header { |
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149 | __u8 e_ident[EI_NIDENT]; |
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150 | elf32_half e_type; |
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151 | elf32_half e_machine; |
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152 | elf32_word e_version; |
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153 | elf32_addr e_entry; |
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154 | elf32_off e_phoff; |
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155 | elf32_off e_shoff; |
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156 | elf32_word e_flags; |
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157 | elf32_half e_ehsize; |
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158 | elf32_half e_phentsize; |
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159 | elf32_half e_phnum; |
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160 | elf32_half e_shentsize; |
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161 | elf32_half e_shnum; |
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162 | elf32_half e_shstrndx; |
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163 | }; |
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164 | |||
855 | bondari | 165 | |
166 | /* |
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167 | * 32-bit ELF section header |
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168 | */ |
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169 | struct elf32_section_header { |
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170 | elf32_word sh_name; |
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171 | elf32_word sh_type; |
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172 | elf32_word sh_flags; |
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173 | elf32_addr sh_addr; |
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174 | elf32_off sh_offset; |
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175 | elf32_word sh_size; |
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176 | elf32_word sh_link; |
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177 | elf32_word sh_info; |
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178 | elf32_word sh_addralign; |
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179 | elf32_word sh_entsize; |
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856 | bondari | 180 | }; |
855 | bondari | 181 | |
182 | |||
183 | typedef struct elf32_header elf32_header_t; |
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184 | typedef struct elf32_section_header elf32_section_header_t; |
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185 | |||
186 | |||
854 | bondari | 187 | extern int elf32_load(__address header, as_t * as); |
188 | |||
189 | #endif |