1 #ifndef _LINUX_ELF_H 2 #define _LINUX_ELF_H 3 4 #include <linux/types.h> 5 #include <linux/elf-em.h> 6 #include <asm/elf.h> 7 8 struct file; 9 10 #ifndef elf_read_implies_exec 11 /* Executables for which elf_read_implies_exec() returns TRUE will 12 have the READ_IMPLIES_EXEC personality flag set automatically. 13 Override in asm/elf.h as needed. */ 14 # define elf_read_implies_exec(ex, have_pt_gnu_stack) 0 15 #endif 16 17 /* 32-bit ELF base types. */ 18 typedef __u32 Elf32_Addr; 19 typedef __u16 Elf32_Half; 20 typedef __u32 Elf32_Off; 21 typedef __s32 Elf32_Sword; 22 typedef __u32 Elf32_Word; 23 24 /* 64-bit ELF base types. */ 25 typedef __u64 Elf64_Addr; 26 typedef __u16 Elf64_Half; 27 typedef __s16 Elf64_SHalf; 28 typedef __u64 Elf64_Off; 29 typedef __s32 Elf64_Sword; 30 typedef __u32 Elf64_Word; 31 typedef __u64 Elf64_Xword; 32 typedef __s64 Elf64_Sxword; 33 34 /* These constants are for the segment types stored in the image headers */ 35 #define PT_NULL 0 36 #define PT_LOAD 1 37 #define PT_DYNAMIC 2 38 #define PT_INTERP 3 39 #define PT_NOTE 4 40 #define PT_SHLIB 5 41 #define PT_PHDR 6 42 #define PT_TLS 7 /* Thread local storage segment */ 43 #define PT_LOOS 0x60000000 /* OS-specific */ 44 #define PT_HIOS 0x6fffffff /* OS-specific */ 45 #define PT_LOPROC 0x70000000 46 #define PT_HIPROC 0x7fffffff 47 #define PT_GNU_EH_FRAME 0x6474e550 48 49 #define PT_GNU_STACK (PT_LOOS + 0x474e551) 50 51 /* These constants define the different elf file types */ 52 #define ET_NONE 0 53 #define ET_REL 1 54 #define ET_EXEC 2 55 #define ET_DYN 3 56 #define ET_CORE 4 57 #define ET_LOPROC 0xff00 58 #define ET_HIPROC 0xffff 59 60 /* This is the info that is needed to parse the dynamic section of the file */ 61 #define DT_NULL 0 62 #define DT_NEEDED 1 63 #define DT_PLTRELSZ 2 64 #define DT_PLTGOT 3 65 #define DT_HASH 4 66 #define DT_STRTAB 5 67 #define DT_SYMTAB 6 68 #define DT_RELA 7 69 #define DT_RELASZ 8 70 #define DT_RELAENT 9 71 #define DT_STRSZ 10 72 #define DT_SYMENT 11 73 #define DT_INIT 12 74 #define DT_FINI 13 75 #define DT_SONAME 14 76 #define DT_RPATH 15 77 #define DT_SYMBOLIC 16 78 #define DT_REL 17 79 #define DT_RELSZ 18 80 #define DT_RELENT 19 81 #define DT_PLTREL 20 82 #define DT_DEBUG 21 83 #define DT_TEXTREL 22 84 #define DT_JMPREL 23 85 #define DT_ENCODING 32 86 #define OLD_DT_LOOS 0x60000000 87 #define DT_LOOS 0x6000000d 88 #define DT_HIOS 0x6ffff000 89 #define DT_VALRNGLO 0x6ffffd00 90 #define DT_VALRNGHI 0x6ffffdff 91 #define DT_ADDRRNGLO 0x6ffffe00 92 #define DT_ADDRRNGHI 0x6ffffeff 93 #define DT_VERSYM 0x6ffffff0 94 #define DT_RELACOUNT 0x6ffffff9 95 #define DT_RELCOUNT 0x6ffffffa 96 #define DT_FLAGS_1 0x6ffffffb 97 #define DT_VERDEF 0x6ffffffc 98 #define DT_VERDEFNUM 0x6ffffffd 99 #define DT_VERNEED 0x6ffffffe 100 #define DT_VERNEEDNUM 0x6fffffff 101 #define OLD_DT_HIOS 0x6fffffff 102 #define DT_LOPROC 0x70000000 103 #define DT_HIPROC 0x7fffffff 104 105 /* This info is needed when parsing the symbol table */ 106 #define STB_LOCAL 0 107 #define STB_GLOBAL 1 108 #define STB_WEAK 2 109 110 #define STT_NOTYPE 0 111 #define STT_OBJECT 1 112 #define STT_FUNC 2 113 #define STT_SECTION 3 114 #define STT_FILE 4 115 #define STT_COMMON 5 116 #define STT_TLS 6 117 118 #define ELF_ST_BIND(x) ((x) >> 4) 119 #define ELF_ST_TYPE(x) (((unsigned int) x) & 0xf) 120 #define ELF32_ST_BIND(x) ELF_ST_BIND(x) 121 #define ELF32_ST_TYPE(x) ELF_ST_TYPE(x) 122 #define ELF64_ST_BIND(x) ELF_ST_BIND(x) 123 #define ELF64_ST_TYPE(x) ELF_ST_TYPE(x) 124 125 typedef struct dynamic{ 126 Elf32_Sword d_tag; 127 union{ 128 Elf32_Sword d_val; 129 Elf32_Addr d_ptr; 130 } d_un; 131 } Elf32_Dyn; 132 133 typedef struct { 134 Elf64_Sxword d_tag; /* entry tag value */ 135 union { 136 Elf64_Xword d_val; 137 Elf64_Addr d_ptr; 138 } d_un; 139 } Elf64_Dyn; 140 141 /* The following are used with relocations */ 142 #define ELF32_R_SYM(x) ((x) >> 8) 143 #define ELF32_R_TYPE(x) ((x) & 0xff) 144 145 #define ELF64_R_SYM(i) ((i) >> 32) 146 #define ELF64_R_TYPE(i) ((i) & 0xffffffff) 147 148 typedef struct elf32_rel { 149 Elf32_Addr r_offset; 150 Elf32_Word r_info; 151 } Elf32_Rel; 152 153 typedef struct elf64_rel { 154 Elf64_Addr r_offset; /* Location at which to apply the action */ 155 Elf64_Xword r_info; /* index and type of relocation */ 156 } Elf64_Rel; 157 158 typedef struct elf32_rela{ 159 Elf32_Addr r_offset; 160 Elf32_Word r_info; 161 Elf32_Sword r_addend; 162 } Elf32_Rela; 163 164 typedef struct elf64_rela { 165 Elf64_Addr r_offset; /* Location at which to apply the action */ 166 Elf64_Xword r_info; /* index and type of relocation */ 167 Elf64_Sxword r_addend; /* Constant addend used to compute value */ 168 } Elf64_Rela; 169 170 typedef struct elf32_sym{ 171 Elf32_Word st_name; 172 Elf32_Addr st_value; 173 Elf32_Word st_size; 174 unsigned char st_info; 175 unsigned char st_other; 176 Elf32_Half st_shndx; 177 } Elf32_Sym; 178 179 typedef struct elf64_sym { 180 Elf64_Word st_name; /* Symbol name, index in string tbl */ 181 unsigned char st_info; /* Type and binding attributes */ 182 unsigned char st_other; /* No defined meaning, 0 */ 183 Elf64_Half st_shndx; /* Associated section index */ 184 Elf64_Addr st_value; /* Value of the symbol */ 185 Elf64_Xword st_size; /* Associated symbol size */ 186 } Elf64_Sym; 187 188 189 #define EI_NIDENT 16 190 191 typedef struct elf32_hdr{ 192 unsigned char e_ident[EI_NIDENT]; 193 Elf32_Half e_type; 194 Elf32_Half e_machine; 195 Elf32_Word e_version; 196 Elf32_Addr e_entry; /* Entry point */ 197 Elf32_Off e_phoff; 198 Elf32_Off e_shoff; 199 Elf32_Word e_flags; 200 Elf32_Half e_ehsize; 201 Elf32_Half e_phentsize; 202 Elf32_Half e_phnum; 203 Elf32_Half e_shentsize; 204 Elf32_Half e_shnum; 205 Elf32_Half e_shstrndx; 206 } Elf32_Ehdr; 207 208 typedef struct elf64_hdr { 209 unsigned char e_ident[16]; /* ELF "magic number" */ 210 Elf64_Half e_type; 211 Elf64_Half e_machine; 212 Elf64_Word e_version; 213 Elf64_Addr e_entry; /* Entry point virtual address */ 214 Elf64_Off e_phoff; /* Program header table file offset */ 215 Elf64_Off e_shoff; /* Section header table file offset */ 216 Elf64_Word e_flags; 217 Elf64_Half e_ehsize; 218 Elf64_Half e_phentsize; 219 Elf64_Half e_phnum; 220 Elf64_Half e_shentsize; 221 Elf64_Half e_shnum; 222 Elf64_Half e_shstrndx; 223 } Elf64_Ehdr; 224 225 /* These constants define the permissions on sections in the program 226 header, p_flags. */ 227 #define PF_R 0x4 228 #define PF_W 0x2 229 #define PF_X 0x1 230 231 typedef struct elf32_phdr{ 232 Elf32_Word p_type; 233 Elf32_Off p_offset; 234 Elf32_Addr p_vaddr; 235 Elf32_Addr p_paddr; 236 Elf32_Word p_filesz; 237 Elf32_Word p_memsz; 238 Elf32_Word p_flags; 239 Elf32_Word p_align; 240 } Elf32_Phdr; 241 242 typedef struct elf64_phdr { 243 Elf64_Word p_type; 244 Elf64_Word p_flags; 245 Elf64_Off p_offset; /* Segment file offset */ 246 Elf64_Addr p_vaddr; /* Segment virtual address */ 247 Elf64_Addr p_paddr; /* Segment physical address */ 248 Elf64_Xword p_filesz; /* Segment size in file */ 249 Elf64_Xword p_memsz; /* Segment size in memory */ 250 Elf64_Xword p_align; /* Segment alignment, file & memory */ 251 } Elf64_Phdr; 252 253 /* sh_type */ 254 #define SHT_NULL 0 255 #define SHT_PROGBITS 1 256 #define SHT_SYMTAB 2 257 #define SHT_STRTAB 3 258 #define SHT_RELA 4 259 #define SHT_HASH 5 260 #define SHT_DYNAMIC 6 261 #define SHT_NOTE 7 262 #define SHT_NOBITS 8 263 #define SHT_REL 9 264 #define SHT_SHLIB 10 265 #define SHT_DYNSYM 11 266 #define SHT_NUM 12 267 #define SHT_LOPROC 0x70000000 268 #define SHT_HIPROC 0x7fffffff 269 #define SHT_LOUSER 0x80000000 270 #define SHT_HIUSER 0xffffffff 271 272 /* sh_flags */ 273 #define SHF_WRITE 0x1 274 #define SHF_ALLOC 0x2 275 #define SHF_EXECINSTR 0x4 276 #define SHF_MASKPROC 0xf0000000 277 278 /* special section indexes */ 279 #define SHN_UNDEF 0 280 #define SHN_LORESERVE 0xff00 281 #define SHN_LOPROC 0xff00 282 #define SHN_HIPROC 0xff1f 283 #define SHN_ABS 0xfff1 284 #define SHN_COMMON 0xfff2 285 #define SHN_HIRESERVE 0xffff 286 287 typedef struct { 288 Elf32_Word sh_name; 289 Elf32_Word sh_type; 290 Elf32_Word sh_flags; 291 Elf32_Addr sh_addr; 292 Elf32_Off sh_offset; 293 Elf32_Word sh_size; 294 Elf32_Word sh_link; 295 Elf32_Word sh_info; 296 Elf32_Word sh_addralign; 297 Elf32_Word sh_entsize; 298 } Elf32_Shdr; 299 300 typedef struct elf64_shdr { 301 Elf64_Word sh_name; /* Section name, index in string tbl */ 302 Elf64_Word sh_type; /* Type of section */ 303 Elf64_Xword sh_flags; /* Miscellaneous section attributes */ 304 Elf64_Addr sh_addr; /* Section virtual addr at execution */ 305 Elf64_Off sh_offset; /* Section file offset */ 306 Elf64_Xword sh_size; /* Size of section in bytes */ 307 Elf64_Word sh_link; /* Index of another section */ 308 Elf64_Word sh_info; /* Additional section information */ 309 Elf64_Xword sh_addralign; /* Section alignment */ 310 Elf64_Xword sh_entsize; /* Entry size if section holds table */ 311 } Elf64_Shdr; 312 313 #define EI_MAG0 0 /* e_ident[] indexes */ 314 #define EI_MAG1 1 315 #define EI_MAG2 2 316 #define EI_MAG3 3 317 #define EI_CLASS 4 318 #define EI_DATA 5 319 #define EI_VERSION 6 320 #define EI_OSABI 7 321 #define EI_PAD 8 322 323 #define ELFMAG0 0x7f /* EI_MAG */ 324 #define ELFMAG1 'E' 325 #define ELFMAG2 'L' 326 #define ELFMAG3 'F' 327 #define ELFMAG "\177ELF" 328 #define SELFMAG 4 329 330 #define ELFCLASSNONE 0 /* EI_CLASS */ 331 #define ELFCLASS32 1 332 #define ELFCLASS64 2 333 #define ELFCLASSNUM 3 334 335 #define ELFDATANONE 0 /* e_ident[EI_DATA] */ 336 #define ELFDATA2LSB 1 337 #define ELFDATA2MSB 2 338 339 #define EV_NONE 0 /* e_version, EI_VERSION */ 340 #define EV_CURRENT 1 341 #define EV_NUM 2 342 343 #define ELFOSABI_NONE 0 344 #define ELFOSABI_LINUX 3 345 346 #ifndef ELF_OSABI 347 #define ELF_OSABI ELFOSABI_NONE 348 #endif 349 350 /* Notes used in ET_CORE */ 351 #define NT_PRSTATUS 1 352 #define NT_PRFPREG 2 353 #define NT_PRPSINFO 3 354 #define NT_TASKSTRUCT 4 355 #define NT_AUXV 6 356 #define NT_PRXFPREG 0x46e62b7f /* copied from gdb5.1/include/elf/common.h */ 357 #define NT_PPC_VMX 0x100 /* PowerPC Altivec/VMX registers */ 358 359 360 /* Note header in a PT_NOTE section */ 361 typedef struct elf32_note { 362 Elf32_Word n_namesz; /* Name size */ 363 Elf32_Word n_descsz; /* Content size */ 364 Elf32_Word n_type; /* Content type */ 365 } Elf32_Nhdr; 366 367 /* Note header in a PT_NOTE section */ 368 typedef struct elf64_note { 369 Elf64_Word n_namesz; /* Name size */ 370 Elf64_Word n_descsz; /* Content size */ 371 Elf64_Word n_type; /* Content type */ 372 } Elf64_Nhdr; 373 374 #if ELF_CLASS == ELFCLASS32 375 376 extern Elf32_Dyn _DYNAMIC []; 377 #define elfhdr elf32_hdr 378 #define elf_phdr elf32_phdr 379 #define elf_note elf32_note 380 #define elf_addr_t Elf32_Off 381 382 #else 383 384 extern Elf64_Dyn _DYNAMIC []; 385 #define elfhdr elf64_hdr 386 #define elf_phdr elf64_phdr 387 #define elf_note elf64_note 388 #define elf_addr_t Elf64_Off 389 390 #endif 391 392 /* Optional callbacks to write extra ELF notes. */ 393 #ifndef ARCH_HAVE_EXTRA_ELF_NOTES 394 static inline int elf_coredump_extra_notes_size(void) { return 0; } 395 static inline int elf_coredump_extra_notes_write(struct file *file, 396 loff_t *foffset) { return 0; } 397 #else 398 extern int elf_coredump_extra_notes_size(void); 399 extern int elf_coredump_extra_notes_write(struct file *file, loff_t *foffset); 400 #endif 401 402 #endif /* _LINUX_ELF_H */ 403