1 #ifndef _LINUX_ELF_H 2 #define _LINUX_ELF_H 3 4 #include <linux/types.h> 5 #include <linux/auxvec.h> 6 #include <linux/elf-em.h> 7 #include <asm/elf.h> 8 9 #ifndef elf_read_implies_exec 10 /* Executables for which elf_read_implies_exec() returns TRUE will 11 have the READ_IMPLIES_EXEC personality flag set automatically. 12 Override in asm/elf.h as needed. */ 13 # define elf_read_implies_exec(ex, have_pt_gnu_stack) 0 14 #endif 15 16 /* 32-bit ELF base types. */ 17 typedef __u32 Elf32_Addr; 18 typedef __u16 Elf32_Half; 19 typedef __u32 Elf32_Off; 20 typedef __s32 Elf32_Sword; 21 typedef __u32 Elf32_Word; 22 23 /* 64-bit ELF base types. */ 24 typedef __u64 Elf64_Addr; 25 typedef __u16 Elf64_Half; 26 typedef __s16 Elf64_SHalf; 27 typedef __u64 Elf64_Off; 28 typedef __s32 Elf64_Sword; 29 typedef __u32 Elf64_Word; 30 typedef __u64 Elf64_Xword; 31 typedef __s64 Elf64_Sxword; 32 33 /* These constants are for the segment types stored in the image headers */ 34 #define PT_NULL 0 35 #define PT_LOAD 1 36 #define PT_DYNAMIC 2 37 #define PT_INTERP 3 38 #define PT_NOTE 4 39 #define PT_SHLIB 5 40 #define PT_PHDR 6 41 #define PT_TLS 7 /* Thread local storage segment */ 42 #define PT_LOOS 0x60000000 /* OS-specific */ 43 #define PT_HIOS 0x6fffffff /* OS-specific */ 44 #define PT_LOPROC 0x70000000 45 #define PT_HIPROC 0x7fffffff 46 #define PT_GNU_EH_FRAME 0x6474e550 47 48 #define PT_GNU_STACK (PT_LOOS + 0x474e551) 49 50 /* These constants define the different elf file types */ 51 #define ET_NONE 0 52 #define ET_REL 1 53 #define ET_EXEC 2 54 #define ET_DYN 3 55 #define ET_CORE 4 56 #define ET_LOPROC 0xff00 57 #define ET_HIPROC 0xffff 58 59 /* This is the info that is needed to parse the dynamic section of the file */ 60 #define DT_NULL 0 61 #define DT_NEEDED 1 62 #define DT_PLTRELSZ 2 63 #define DT_PLTGOT 3 64 #define DT_HASH 4 65 #define DT_STRTAB 5 66 #define DT_SYMTAB 6 67 #define DT_RELA 7 68 #define DT_RELASZ 8 69 #define DT_RELAENT 9 70 #define DT_STRSZ 10 71 #define DT_SYMENT 11 72 #define DT_INIT 12 73 #define DT_FINI 13 74 #define DT_SONAME 14 75 #define DT_RPATH 15 76 #define DT_SYMBOLIC 16 77 #define DT_REL 17 78 #define DT_RELSZ 18 79 #define DT_RELENT 19 80 #define DT_PLTREL 20 81 #define DT_DEBUG 21 82 #define DT_TEXTREL 22 83 #define DT_JMPREL 23 84 #define DT_LOPROC 0x70000000 85 #define DT_HIPROC 0x7fffffff 86 87 /* This info is needed when parsing the symbol table */ 88 #define STB_LOCAL 0 89 #define STB_GLOBAL 1 90 #define STB_WEAK 2 91 92 #define STT_NOTYPE 0 93 #define STT_OBJECT 1 94 #define STT_FUNC 2 95 #define STT_SECTION 3 96 #define STT_FILE 4 97 #define STT_COMMON 5 98 #define STT_TLS 6 99 100 #define ELF_ST_BIND(x) ((x) >> 4) 101 #define ELF_ST_TYPE(x) (((unsigned int) x) & 0xf) 102 #define ELF32_ST_BIND(x) ELF_ST_BIND(x) 103 #define ELF32_ST_TYPE(x) ELF_ST_TYPE(x) 104 #define ELF64_ST_BIND(x) ELF_ST_BIND(x) 105 #define ELF64_ST_TYPE(x) ELF_ST_TYPE(x) 106 107 typedef struct dynamic{ 108 Elf32_Sword d_tag; 109 union{ 110 Elf32_Sword d_val; 111 Elf32_Addr d_ptr; 112 } d_un; 113 } Elf32_Dyn; 114 115 typedef struct { 116 Elf64_Sxword d_tag; /* entry tag value */ 117 union { 118 Elf64_Xword d_val; 119 Elf64_Addr d_ptr; 120 } d_un; 121 } Elf64_Dyn; 122 123 /* The following are used with relocations */ 124 #define ELF32_R_SYM(x) ((x) >> 8) 125 #define ELF32_R_TYPE(x) ((x) & 0xff) 126 127 #define ELF64_R_SYM(i) ((i) >> 32) 128 #define ELF64_R_TYPE(i) ((i) & 0xffffffff) 129 130 typedef struct elf32_rel { 131 Elf32_Addr r_offset; 132 Elf32_Word r_info; 133 } Elf32_Rel; 134 135 typedef struct elf64_rel { 136 Elf64_Addr r_offset; /* Location at which to apply the action */ 137 Elf64_Xword r_info; /* index and type of relocation */ 138 } Elf64_Rel; 139 140 typedef struct elf32_rela{ 141 Elf32_Addr r_offset; 142 Elf32_Word r_info; 143 Elf32_Sword r_addend; 144 } Elf32_Rela; 145 146 typedef struct elf64_rela { 147 Elf64_Addr r_offset; /* Location at which to apply the action */ 148 Elf64_Xword r_info; /* index and type of relocation */ 149 Elf64_Sxword r_addend; /* Constant addend used to compute value */ 150 } Elf64_Rela; 151 152 typedef struct elf32_sym{ 153 Elf32_Word st_name; 154 Elf32_Addr st_value; 155 Elf32_Word st_size; 156 unsigned char st_info; 157 unsigned char st_other; 158 Elf32_Half st_shndx; 159 } Elf32_Sym; 160 161 typedef struct elf64_sym { 162 Elf64_Word st_name; /* Symbol name, index in string tbl */ 163 unsigned char st_info; /* Type and binding attributes */ 164 unsigned char st_other; /* No defined meaning, 0 */ 165 Elf64_Half st_shndx; /* Associated section index */ 166 Elf64_Addr st_value; /* Value of the symbol */ 167 Elf64_Xword st_size; /* Associated symbol size */ 168 } Elf64_Sym; 169 170 171 #define EI_NIDENT 16 172 173 typedef struct elf32_hdr{ 174 unsigned char e_ident[EI_NIDENT]; 175 Elf32_Half e_type; 176 Elf32_Half e_machine; 177 Elf32_Word e_version; 178 Elf32_Addr e_entry; /* Entry point */ 179 Elf32_Off e_phoff; 180 Elf32_Off e_shoff; 181 Elf32_Word e_flags; 182 Elf32_Half e_ehsize; 183 Elf32_Half e_phentsize; 184 Elf32_Half e_phnum; 185 Elf32_Half e_shentsize; 186 Elf32_Half e_shnum; 187 Elf32_Half e_shstrndx; 188 } Elf32_Ehdr; 189 190 typedef struct elf64_hdr { 191 unsigned char e_ident[16]; /* ELF "magic number" */ 192 Elf64_Half e_type; 193 Elf64_Half e_machine; 194 Elf64_Word e_version; 195 Elf64_Addr e_entry; /* Entry point virtual address */ 196 Elf64_Off e_phoff; /* Program header table file offset */ 197 Elf64_Off e_shoff; /* Section header table file offset */ 198 Elf64_Word e_flags; 199 Elf64_Half e_ehsize; 200 Elf64_Half e_phentsize; 201 Elf64_Half e_phnum; 202 Elf64_Half e_shentsize; 203 Elf64_Half e_shnum; 204 Elf64_Half e_shstrndx; 205 } Elf64_Ehdr; 206 207 /* These constants define the permissions on sections in the program 208 header, p_flags. */ 209 #define PF_R 0x4 210 #define PF_W 0x2 211 #define PF_X 0x1 212 213 typedef struct elf32_phdr{ 214 Elf32_Word p_type; 215 Elf32_Off p_offset; 216 Elf32_Addr p_vaddr; 217 Elf32_Addr p_paddr; 218 Elf32_Word p_filesz; 219 Elf32_Word p_memsz; 220 Elf32_Word p_flags; 221 Elf32_Word p_align; 222 } Elf32_Phdr; 223 224 typedef struct elf64_phdr { 225 Elf64_Word p_type; 226 Elf64_Word p_flags; 227 Elf64_Off p_offset; /* Segment file offset */ 228 Elf64_Addr p_vaddr; /* Segment virtual address */ 229 Elf64_Addr p_paddr; /* Segment physical address */ 230 Elf64_Xword p_filesz; /* Segment size in file */ 231 Elf64_Xword p_memsz; /* Segment size in memory */ 232 Elf64_Xword p_align; /* Segment alignment, file & memory */ 233 } Elf64_Phdr; 234 235 /* sh_type */ 236 #define SHT_NULL 0 237 #define SHT_PROGBITS 1 238 #define SHT_SYMTAB 2 239 #define SHT_STRTAB 3 240 #define SHT_RELA 4 241 #define SHT_HASH 5 242 #define SHT_DYNAMIC 6 243 #define SHT_NOTE 7 244 #define SHT_NOBITS 8 245 #define SHT_REL 9 246 #define SHT_SHLIB 10 247 #define SHT_DYNSYM 11 248 #define SHT_NUM 12 249 #define SHT_LOPROC 0x70000000 250 #define SHT_HIPROC 0x7fffffff 251 #define SHT_LOUSER 0x80000000 252 #define SHT_HIUSER 0xffffffff 253 254 /* sh_flags */ 255 #define SHF_WRITE 0x1 256 #define SHF_ALLOC 0x2 257 #define SHF_EXECINSTR 0x4 258 #define SHF_MASKPROC 0xf0000000 259 260 /* special section indexes */ 261 #define SHN_UNDEF 0 262 #define SHN_LORESERVE 0xff00 263 #define SHN_LOPROC 0xff00 264 #define SHN_HIPROC 0xff1f 265 #define SHN_ABS 0xfff1 266 #define SHN_COMMON 0xfff2 267 #define SHN_HIRESERVE 0xffff 268 269 typedef struct { 270 Elf32_Word sh_name; 271 Elf32_Word sh_type; 272 Elf32_Word sh_flags; 273 Elf32_Addr sh_addr; 274 Elf32_Off sh_offset; 275 Elf32_Word sh_size; 276 Elf32_Word sh_link; 277 Elf32_Word sh_info; 278 Elf32_Word sh_addralign; 279 Elf32_Word sh_entsize; 280 } Elf32_Shdr; 281 282 typedef struct elf64_shdr { 283 Elf64_Word sh_name; /* Section name, index in string tbl */ 284 Elf64_Word sh_type; /* Type of section */ 285 Elf64_Xword sh_flags; /* Miscellaneous section attributes */ 286 Elf64_Addr sh_addr; /* Section virtual addr at execution */ 287 Elf64_Off sh_offset; /* Section file offset */ 288 Elf64_Xword sh_size; /* Size of section in bytes */ 289 Elf64_Word sh_link; /* Index of another section */ 290 Elf64_Word sh_info; /* Additional section information */ 291 Elf64_Xword sh_addralign; /* Section alignment */ 292 Elf64_Xword sh_entsize; /* Entry size if section holds table */ 293 } Elf64_Shdr; 294 295 #define EI_MAG0 0 /* e_ident[] indexes */ 296 #define EI_MAG1 1 297 #define EI_MAG2 2 298 #define EI_MAG3 3 299 #define EI_CLASS 4 300 #define EI_DATA 5 301 #define EI_VERSION 6 302 #define EI_OSABI 7 303 #define EI_PAD 8 304 305 #define ELFMAG0 0x7f /* EI_MAG */ 306 #define ELFMAG1 'E' 307 #define ELFMAG2 'L' 308 #define ELFMAG3 'F' 309 #define ELFMAG "\177ELF" 310 #define SELFMAG 4 311 312 #define ELFCLASSNONE 0 /* EI_CLASS */ 313 #define ELFCLASS32 1 314 #define ELFCLASS64 2 315 #define ELFCLASSNUM 3 316 317 #define ELFDATANONE 0 /* e_ident[EI_DATA] */ 318 #define ELFDATA2LSB 1 319 #define ELFDATA2MSB 2 320 321 #define EV_NONE 0 /* e_version, EI_VERSION */ 322 #define EV_CURRENT 1 323 #define EV_NUM 2 324 325 #define ELFOSABI_NONE 0 326 #define ELFOSABI_LINUX 3 327 328 #ifndef ELF_OSABI 329 #define ELF_OSABI ELFOSABI_NONE 330 #endif 331 332 /* Notes used in ET_CORE */ 333 #define NT_PRSTATUS 1 334 #define NT_PRFPREG 2 335 #define NT_PRPSINFO 3 336 #define NT_TASKSTRUCT 4 337 #define NT_AUXV 6 338 #define NT_PRXFPREG 0x46e62b7f /* copied from gdb5.1/include/elf/common.h */ 339 340 341 /* Note header in a PT_NOTE section */ 342 typedef struct elf32_note { 343 Elf32_Word n_namesz; /* Name size */ 344 Elf32_Word n_descsz; /* Content size */ 345 Elf32_Word n_type; /* Content type */ 346 } Elf32_Nhdr; 347 348 /* Note header in a PT_NOTE section */ 349 typedef struct elf64_note { 350 Elf64_Word n_namesz; /* Name size */ 351 Elf64_Word n_descsz; /* Content size */ 352 Elf64_Word n_type; /* Content type */ 353 } Elf64_Nhdr; 354 355 #if ELF_CLASS == ELFCLASS32 356 357 extern Elf32_Dyn _DYNAMIC []; 358 #define elfhdr elf32_hdr 359 #define elf_phdr elf32_phdr 360 #define elf_note elf32_note 361 362 #else 363 364 extern Elf64_Dyn _DYNAMIC []; 365 #define elfhdr elf64_hdr 366 #define elf_phdr elf64_phdr 367 #define elf_note elf64_note 368 369 #endif 370 371 372 #endif /* _LINUX_ELF_H */ 373