1 #ifndef _LINUX_ELF_H 2 #define _LINUX_ELF_H 3 4 #include <linux/types.h> 5 #include <linux/elf-em.h> 6 #ifdef __KERNEL__ 7 #include <asm/elf.h> 8 #endif 9 10 struct file; 11 12 #ifndef elf_read_implies_exec 13 /* Executables for which elf_read_implies_exec() returns TRUE will 14 have the READ_IMPLIES_EXEC personality flag set automatically. 15 Override in asm/elf.h as needed. */ 16 # define elf_read_implies_exec(ex, have_pt_gnu_stack) 0 17 #endif 18 19 /* 32-bit ELF base types. */ 20 typedef __u32 Elf32_Addr; 21 typedef __u16 Elf32_Half; 22 typedef __u32 Elf32_Off; 23 typedef __s32 Elf32_Sword; 24 typedef __u32 Elf32_Word; 25 26 /* 64-bit ELF base types. */ 27 typedef __u64 Elf64_Addr; 28 typedef __u16 Elf64_Half; 29 typedef __s16 Elf64_SHalf; 30 typedef __u64 Elf64_Off; 31 typedef __s32 Elf64_Sword; 32 typedef __u32 Elf64_Word; 33 typedef __u64 Elf64_Xword; 34 typedef __s64 Elf64_Sxword; 35 36 /* These constants are for the segment types stored in the image headers */ 37 #define PT_NULL 0 38 #define PT_LOAD 1 39 #define PT_DYNAMIC 2 40 #define PT_INTERP 3 41 #define PT_NOTE 4 42 #define PT_SHLIB 5 43 #define PT_PHDR 6 44 #define PT_TLS 7 /* Thread local storage segment */ 45 #define PT_LOOS 0x60000000 /* OS-specific */ 46 #define PT_HIOS 0x6fffffff /* OS-specific */ 47 #define PT_LOPROC 0x70000000 48 #define PT_HIPROC 0x7fffffff 49 #define PT_GNU_EH_FRAME 0x6474e550 50 51 #define PT_GNU_STACK (PT_LOOS + 0x474e551) 52 53 /* These constants define the different elf file types */ 54 #define ET_NONE 0 55 #define ET_REL 1 56 #define ET_EXEC 2 57 #define ET_DYN 3 58 #define ET_CORE 4 59 #define ET_LOPROC 0xff00 60 #define ET_HIPROC 0xffff 61 62 /* This is the info that is needed to parse the dynamic section of the file */ 63 #define DT_NULL 0 64 #define DT_NEEDED 1 65 #define DT_PLTRELSZ 2 66 #define DT_PLTGOT 3 67 #define DT_HASH 4 68 #define DT_STRTAB 5 69 #define DT_SYMTAB 6 70 #define DT_RELA 7 71 #define DT_RELASZ 8 72 #define DT_RELAENT 9 73 #define DT_STRSZ 10 74 #define DT_SYMENT 11 75 #define DT_INIT 12 76 #define DT_FINI 13 77 #define DT_SONAME 14 78 #define DT_RPATH 15 79 #define DT_SYMBOLIC 16 80 #define DT_REL 17 81 #define DT_RELSZ 18 82 #define DT_RELENT 19 83 #define DT_PLTREL 20 84 #define DT_DEBUG 21 85 #define DT_TEXTREL 22 86 #define DT_JMPREL 23 87 #define DT_ENCODING 32 88 #define OLD_DT_LOOS 0x60000000 89 #define DT_LOOS 0x6000000d 90 #define DT_HIOS 0x6ffff000 91 #define DT_VALRNGLO 0x6ffffd00 92 #define DT_VALRNGHI 0x6ffffdff 93 #define DT_ADDRRNGLO 0x6ffffe00 94 #define DT_ADDRRNGHI 0x6ffffeff 95 #define DT_VERSYM 0x6ffffff0 96 #define DT_RELACOUNT 0x6ffffff9 97 #define DT_RELCOUNT 0x6ffffffa 98 #define DT_FLAGS_1 0x6ffffffb 99 #define DT_VERDEF 0x6ffffffc 100 #define DT_VERDEFNUM 0x6ffffffd 101 #define DT_VERNEED 0x6ffffffe 102 #define DT_VERNEEDNUM 0x6fffffff 103 #define OLD_DT_HIOS 0x6fffffff 104 #define DT_LOPROC 0x70000000 105 #define DT_HIPROC 0x7fffffff 106 107 /* This info is needed when parsing the symbol table */ 108 #define STB_LOCAL 0 109 #define STB_GLOBAL 1 110 #define STB_WEAK 2 111 112 #define STT_NOTYPE 0 113 #define STT_OBJECT 1 114 #define STT_FUNC 2 115 #define STT_SECTION 3 116 #define STT_FILE 4 117 #define STT_COMMON 5 118 #define STT_TLS 6 119 120 #define ELF_ST_BIND(x) ((x) >> 4) 121 #define ELF_ST_TYPE(x) (((unsigned int) x) & 0xf) 122 #define ELF32_ST_BIND(x) ELF_ST_BIND(x) 123 #define ELF32_ST_TYPE(x) ELF_ST_TYPE(x) 124 #define ELF64_ST_BIND(x) ELF_ST_BIND(x) 125 #define ELF64_ST_TYPE(x) ELF_ST_TYPE(x) 126 127 typedef struct dynamic{ 128 Elf32_Sword d_tag; 129 union{ 130 Elf32_Sword d_val; 131 Elf32_Addr d_ptr; 132 } d_un; 133 } Elf32_Dyn; 134 135 typedef struct { 136 Elf64_Sxword d_tag; /* entry tag value */ 137 union { 138 Elf64_Xword d_val; 139 Elf64_Addr d_ptr; 140 } d_un; 141 } Elf64_Dyn; 142 143 /* The following are used with relocations */ 144 #define ELF32_R_SYM(x) ((x) >> 8) 145 #define ELF32_R_TYPE(x) ((x) & 0xff) 146 147 #define ELF64_R_SYM(i) ((i) >> 32) 148 #define ELF64_R_TYPE(i) ((i) & 0xffffffff) 149 150 typedef struct elf32_rel { 151 Elf32_Addr r_offset; 152 Elf32_Word r_info; 153 } Elf32_Rel; 154 155 typedef struct elf64_rel { 156 Elf64_Addr r_offset; /* Location at which to apply the action */ 157 Elf64_Xword r_info; /* index and type of relocation */ 158 } Elf64_Rel; 159 160 typedef struct elf32_rela{ 161 Elf32_Addr r_offset; 162 Elf32_Word r_info; 163 Elf32_Sword r_addend; 164 } Elf32_Rela; 165 166 typedef struct elf64_rela { 167 Elf64_Addr r_offset; /* Location at which to apply the action */ 168 Elf64_Xword r_info; /* index and type of relocation */ 169 Elf64_Sxword r_addend; /* Constant addend used to compute value */ 170 } Elf64_Rela; 171 172 typedef struct elf32_sym{ 173 Elf32_Word st_name; 174 Elf32_Addr st_value; 175 Elf32_Word st_size; 176 unsigned char st_info; 177 unsigned char st_other; 178 Elf32_Half st_shndx; 179 } Elf32_Sym; 180 181 typedef struct elf64_sym { 182 Elf64_Word st_name; /* Symbol name, index in string tbl */ 183 unsigned char st_info; /* Type and binding attributes */ 184 unsigned char st_other; /* No defined meaning, 0 */ 185 Elf64_Half st_shndx; /* Associated section index */ 186 Elf64_Addr st_value; /* Value of the symbol */ 187 Elf64_Xword st_size; /* Associated symbol size */ 188 } Elf64_Sym; 189 190 191 #define EI_NIDENT 16 192 193 typedef struct elf32_hdr{ 194 unsigned char e_ident[EI_NIDENT]; 195 Elf32_Half e_type; 196 Elf32_Half e_machine; 197 Elf32_Word e_version; 198 Elf32_Addr e_entry; /* Entry point */ 199 Elf32_Off e_phoff; 200 Elf32_Off e_shoff; 201 Elf32_Word e_flags; 202 Elf32_Half e_ehsize; 203 Elf32_Half e_phentsize; 204 Elf32_Half e_phnum; 205 Elf32_Half e_shentsize; 206 Elf32_Half e_shnum; 207 Elf32_Half e_shstrndx; 208 } Elf32_Ehdr; 209 210 typedef struct elf64_hdr { 211 unsigned char e_ident[EI_NIDENT]; /* ELF "magic number" */ 212 Elf64_Half e_type; 213 Elf64_Half e_machine; 214 Elf64_Word e_version; 215 Elf64_Addr e_entry; /* Entry point virtual address */ 216 Elf64_Off e_phoff; /* Program header table file offset */ 217 Elf64_Off e_shoff; /* Section header table file offset */ 218 Elf64_Word e_flags; 219 Elf64_Half e_ehsize; 220 Elf64_Half e_phentsize; 221 Elf64_Half e_phnum; 222 Elf64_Half e_shentsize; 223 Elf64_Half e_shnum; 224 Elf64_Half e_shstrndx; 225 } Elf64_Ehdr; 226 227 /* These constants define the permissions on sections in the program 228 header, p_flags. */ 229 #define PF_R 0x4 230 #define PF_W 0x2 231 #define PF_X 0x1 232 233 typedef struct elf32_phdr{ 234 Elf32_Word p_type; 235 Elf32_Off p_offset; 236 Elf32_Addr p_vaddr; 237 Elf32_Addr p_paddr; 238 Elf32_Word p_filesz; 239 Elf32_Word p_memsz; 240 Elf32_Word p_flags; 241 Elf32_Word p_align; 242 } Elf32_Phdr; 243 244 typedef struct elf64_phdr { 245 Elf64_Word p_type; 246 Elf64_Word p_flags; 247 Elf64_Off p_offset; /* Segment file offset */ 248 Elf64_Addr p_vaddr; /* Segment virtual address */ 249 Elf64_Addr p_paddr; /* Segment physical address */ 250 Elf64_Xword p_filesz; /* Segment size in file */ 251 Elf64_Xword p_memsz; /* Segment size in memory */ 252 Elf64_Xword p_align; /* Segment alignment, file & memory */ 253 } Elf64_Phdr; 254 255 /* sh_type */ 256 #define SHT_NULL 0 257 #define SHT_PROGBITS 1 258 #define SHT_SYMTAB 2 259 #define SHT_STRTAB 3 260 #define SHT_RELA 4 261 #define SHT_HASH 5 262 #define SHT_DYNAMIC 6 263 #define SHT_NOTE 7 264 #define SHT_NOBITS 8 265 #define SHT_REL 9 266 #define SHT_SHLIB 10 267 #define SHT_DYNSYM 11 268 #define SHT_NUM 12 269 #define SHT_LOPROC 0x70000000 270 #define SHT_HIPROC 0x7fffffff 271 #define SHT_LOUSER 0x80000000 272 #define SHT_HIUSER 0xffffffff 273 274 /* sh_flags */ 275 #define SHF_WRITE 0x1 276 #define SHF_ALLOC 0x2 277 #define SHF_EXECINSTR 0x4 278 #define SHF_MASKPROC 0xf0000000 279 280 /* special section indexes */ 281 #define SHN_UNDEF 0 282 #define SHN_LORESERVE 0xff00 283 #define SHN_LOPROC 0xff00 284 #define SHN_HIPROC 0xff1f 285 #define SHN_ABS 0xfff1 286 #define SHN_COMMON 0xfff2 287 #define SHN_HIRESERVE 0xffff 288 289 typedef struct { 290 Elf32_Word sh_name; 291 Elf32_Word sh_type; 292 Elf32_Word sh_flags; 293 Elf32_Addr sh_addr; 294 Elf32_Off sh_offset; 295 Elf32_Word sh_size; 296 Elf32_Word sh_link; 297 Elf32_Word sh_info; 298 Elf32_Word sh_addralign; 299 Elf32_Word sh_entsize; 300 } Elf32_Shdr; 301 302 typedef struct elf64_shdr { 303 Elf64_Word sh_name; /* Section name, index in string tbl */ 304 Elf64_Word sh_type; /* Type of section */ 305 Elf64_Xword sh_flags; /* Miscellaneous section attributes */ 306 Elf64_Addr sh_addr; /* Section virtual addr at execution */ 307 Elf64_Off sh_offset; /* Section file offset */ 308 Elf64_Xword sh_size; /* Size of section in bytes */ 309 Elf64_Word sh_link; /* Index of another section */ 310 Elf64_Word sh_info; /* Additional section information */ 311 Elf64_Xword sh_addralign; /* Section alignment */ 312 Elf64_Xword sh_entsize; /* Entry size if section holds table */ 313 } Elf64_Shdr; 314 315 #define EI_MAG0 0 /* e_ident[] indexes */ 316 #define EI_MAG1 1 317 #define EI_MAG2 2 318 #define EI_MAG3 3 319 #define EI_CLASS 4 320 #define EI_DATA 5 321 #define EI_VERSION 6 322 #define EI_OSABI 7 323 #define EI_PAD 8 324 325 #define ELFMAG0 0x7f /* EI_MAG */ 326 #define ELFMAG1 'E' 327 #define ELFMAG2 'L' 328 #define ELFMAG3 'F' 329 #define ELFMAG "\177ELF" 330 #define SELFMAG 4 331 332 #define ELFCLASSNONE 0 /* EI_CLASS */ 333 #define ELFCLASS32 1 334 #define ELFCLASS64 2 335 #define ELFCLASSNUM 3 336 337 #define ELFDATANONE 0 /* e_ident[EI_DATA] */ 338 #define ELFDATA2LSB 1 339 #define ELFDATA2MSB 2 340 341 #define EV_NONE 0 /* e_version, EI_VERSION */ 342 #define EV_CURRENT 1 343 #define EV_NUM 2 344 345 #define ELFOSABI_NONE 0 346 #define ELFOSABI_LINUX 3 347 348 #ifndef ELF_OSABI 349 #define ELF_OSABI ELFOSABI_NONE 350 #endif 351 352 /* Notes used in ET_CORE */ 353 #define NT_PRSTATUS 1 354 #define NT_PRFPREG 2 355 #define NT_PRPSINFO 3 356 #define NT_TASKSTRUCT 4 357 #define NT_AUXV 6 358 #define NT_PRXFPREG 0x46e62b7f /* copied from gdb5.1/include/elf/common.h */ 359 #define NT_PPC_VMX 0x100 /* PowerPC Altivec/VMX registers */ 360 #define NT_PPC_SPE 0x101 /* PowerPC SPE/EVR registers */ 361 #define NT_PPC_VSX 0x102 /* PowerPC VSX registers */ 362 #define NT_386_TLS 0x200 /* i386 TLS slots (struct user_desc) */ 363 #define NT_386_IOPERM 0x201 /* x86 io permission bitmap (1=deny) */ 364 365 366 /* Note header in a PT_NOTE section */ 367 typedef struct elf32_note { 368 Elf32_Word n_namesz; /* Name size */ 369 Elf32_Word n_descsz; /* Content size */ 370 Elf32_Word n_type; /* Content type */ 371 } Elf32_Nhdr; 372 373 /* Note header in a PT_NOTE section */ 374 typedef struct elf64_note { 375 Elf64_Word n_namesz; /* Name size */ 376 Elf64_Word n_descsz; /* Content size */ 377 Elf64_Word n_type; /* Content type */ 378 } Elf64_Nhdr; 379 380 #ifdef __KERNEL__ 381 #if ELF_CLASS == ELFCLASS32 382 383 extern Elf32_Dyn _DYNAMIC []; 384 #define elfhdr elf32_hdr 385 #define elf_phdr elf32_phdr 386 #define elf_note elf32_note 387 #define elf_addr_t Elf32_Off 388 389 #else 390 391 extern Elf64_Dyn _DYNAMIC []; 392 #define elfhdr elf64_hdr 393 #define elf_phdr elf64_phdr 394 #define elf_note elf64_note 395 #define elf_addr_t Elf64_Off 396 397 #endif 398 399 /* Optional callbacks to write extra ELF notes. */ 400 #ifndef ARCH_HAVE_EXTRA_ELF_NOTES 401 static inline int elf_coredump_extra_notes_size(void) { return 0; } 402 static inline int elf_coredump_extra_notes_write(struct file *file, 403 loff_t *foffset) { return 0; } 404 #else 405 extern int elf_coredump_extra_notes_size(void); 406 extern int elf_coredump_extra_notes_write(struct file *file, loff_t *foffset); 407 #endif 408 #endif /* __KERNEL__ */ 409 #endif /* _LINUX_ELF_H */ 410