1 /* 2 * This file is subject to the terms and conditions of the GNU General Public 3 * License. See the file "COPYING" in the main directory of this archive 4 * for more details. 5 * 6 * Much of this is taken from binutils and GNU libc ... 7 */ 8 #ifndef _ASM_ELF_H 9 #define _ASM_ELF_H 10 11 #include <linux/fs.h> 12 #include <uapi/linux/elf.h> 13 14 /* ELF header e_flags defines. */ 15 /* MIPS architecture level. */ 16 #define EF_MIPS_ARCH_1 0x00000000 /* -mips1 code. */ 17 #define EF_MIPS_ARCH_2 0x10000000 /* -mips2 code. */ 18 #define EF_MIPS_ARCH_3 0x20000000 /* -mips3 code. */ 19 #define EF_MIPS_ARCH_4 0x30000000 /* -mips4 code. */ 20 #define EF_MIPS_ARCH_5 0x40000000 /* -mips5 code. */ 21 #define EF_MIPS_ARCH_32 0x50000000 /* MIPS32 code. */ 22 #define EF_MIPS_ARCH_64 0x60000000 /* MIPS64 code. */ 23 #define EF_MIPS_ARCH_32R2 0x70000000 /* MIPS32 R2 code. */ 24 #define EF_MIPS_ARCH_64R2 0x80000000 /* MIPS64 R2 code. */ 25 26 /* The ABI of a file. */ 27 #define EF_MIPS_ABI_O32 0x00001000 /* O32 ABI. */ 28 #define EF_MIPS_ABI_O64 0x00002000 /* O32 extended for 64 bit. */ 29 30 #define PT_MIPS_REGINFO 0x70000000 31 #define PT_MIPS_RTPROC 0x70000001 32 #define PT_MIPS_OPTIONS 0x70000002 33 #define PT_MIPS_ABIFLAGS 0x70000003 34 35 /* Flags in the e_flags field of the header */ 36 #define EF_MIPS_NOREORDER 0x00000001 37 #define EF_MIPS_PIC 0x00000002 38 #define EF_MIPS_CPIC 0x00000004 39 #define EF_MIPS_ABI2 0x00000020 40 #define EF_MIPS_OPTIONS_FIRST 0x00000080 41 #define EF_MIPS_32BITMODE 0x00000100 42 #define EF_MIPS_FP64 0x00000200 43 #define EF_MIPS_ABI 0x0000f000 44 #define EF_MIPS_ARCH 0xf0000000 45 46 #define DT_MIPS_RLD_VERSION 0x70000001 47 #define DT_MIPS_TIME_STAMP 0x70000002 48 #define DT_MIPS_ICHECKSUM 0x70000003 49 #define DT_MIPS_IVERSION 0x70000004 50 #define DT_MIPS_FLAGS 0x70000005 51 #define RHF_NONE 0x00000000 52 #define RHF_HARDWAY 0x00000001 53 #define RHF_NOTPOT 0x00000002 54 #define RHF_SGI_ONLY 0x00000010 55 #define DT_MIPS_BASE_ADDRESS 0x70000006 56 #define DT_MIPS_CONFLICT 0x70000008 57 #define DT_MIPS_LIBLIST 0x70000009 58 #define DT_MIPS_LOCAL_GOTNO 0x7000000a 59 #define DT_MIPS_CONFLICTNO 0x7000000b 60 #define DT_MIPS_LIBLISTNO 0x70000010 61 #define DT_MIPS_SYMTABNO 0x70000011 62 #define DT_MIPS_UNREFEXTNO 0x70000012 63 #define DT_MIPS_GOTSYM 0x70000013 64 #define DT_MIPS_HIPAGENO 0x70000014 65 #define DT_MIPS_RLD_MAP 0x70000016 66 67 #define R_MIPS_NONE 0 68 #define R_MIPS_16 1 69 #define R_MIPS_32 2 70 #define R_MIPS_REL32 3 71 #define R_MIPS_26 4 72 #define R_MIPS_HI16 5 73 #define R_MIPS_LO16 6 74 #define R_MIPS_GPREL16 7 75 #define R_MIPS_LITERAL 8 76 #define R_MIPS_GOT16 9 77 #define R_MIPS_PC16 10 78 #define R_MIPS_CALL16 11 79 #define R_MIPS_GPREL32 12 80 /* The remaining relocs are defined on Irix, although they are not 81 in the MIPS ELF ABI. */ 82 #define R_MIPS_UNUSED1 13 83 #define R_MIPS_UNUSED2 14 84 #define R_MIPS_UNUSED3 15 85 #define R_MIPS_SHIFT5 16 86 #define R_MIPS_SHIFT6 17 87 #define R_MIPS_64 18 88 #define R_MIPS_GOT_DISP 19 89 #define R_MIPS_GOT_PAGE 20 90 #define R_MIPS_GOT_OFST 21 91 /* 92 * The following two relocation types are specified in the MIPS ABI 93 * conformance guide version 1.2 but not yet in the psABI. 94 */ 95 #define R_MIPS_GOTHI16 22 96 #define R_MIPS_GOTLO16 23 97 #define R_MIPS_SUB 24 98 #define R_MIPS_INSERT_A 25 99 #define R_MIPS_INSERT_B 26 100 #define R_MIPS_DELETE 27 101 #define R_MIPS_HIGHER 28 102 #define R_MIPS_HIGHEST 29 103 /* 104 * The following two relocation types are specified in the MIPS ABI 105 * conformance guide version 1.2 but not yet in the psABI. 106 */ 107 #define R_MIPS_CALLHI16 30 108 #define R_MIPS_CALLLO16 31 109 /* 110 * This range is reserved for vendor specific relocations. 111 */ 112 #define R_MIPS_LOVENDOR 100 113 #define R_MIPS_HIVENDOR 127 114 115 #define SHN_MIPS_ACCOMON 0xff00 /* Allocated common symbols */ 116 #define SHN_MIPS_TEXT 0xff01 /* Allocated test symbols. */ 117 #define SHN_MIPS_DATA 0xff02 /* Allocated data symbols. */ 118 #define SHN_MIPS_SCOMMON 0xff03 /* Small common symbols */ 119 #define SHN_MIPS_SUNDEFINED 0xff04 /* Small undefined symbols */ 120 121 #define SHT_MIPS_LIST 0x70000000 122 #define SHT_MIPS_CONFLICT 0x70000002 123 #define SHT_MIPS_GPTAB 0x70000003 124 #define SHT_MIPS_UCODE 0x70000004 125 #define SHT_MIPS_DEBUG 0x70000005 126 #define SHT_MIPS_REGINFO 0x70000006 127 #define SHT_MIPS_PACKAGE 0x70000007 128 #define SHT_MIPS_PACKSYM 0x70000008 129 #define SHT_MIPS_RELD 0x70000009 130 #define SHT_MIPS_IFACE 0x7000000b 131 #define SHT_MIPS_CONTENT 0x7000000c 132 #define SHT_MIPS_OPTIONS 0x7000000d 133 #define SHT_MIPS_SHDR 0x70000010 134 #define SHT_MIPS_FDESC 0x70000011 135 #define SHT_MIPS_EXTSYM 0x70000012 136 #define SHT_MIPS_DENSE 0x70000013 137 #define SHT_MIPS_PDESC 0x70000014 138 #define SHT_MIPS_LOCSYM 0x70000015 139 #define SHT_MIPS_AUXSYM 0x70000016 140 #define SHT_MIPS_OPTSYM 0x70000017 141 #define SHT_MIPS_LOCSTR 0x70000018 142 #define SHT_MIPS_LINE 0x70000019 143 #define SHT_MIPS_RFDESC 0x7000001a 144 #define SHT_MIPS_DELTASYM 0x7000001b 145 #define SHT_MIPS_DELTAINST 0x7000001c 146 #define SHT_MIPS_DELTACLASS 0x7000001d 147 #define SHT_MIPS_DWARF 0x7000001e 148 #define SHT_MIPS_DELTADECL 0x7000001f 149 #define SHT_MIPS_SYMBOL_LIB 0x70000020 150 #define SHT_MIPS_EVENTS 0x70000021 151 #define SHT_MIPS_TRANSLATE 0x70000022 152 #define SHT_MIPS_PIXIE 0x70000023 153 #define SHT_MIPS_XLATE 0x70000024 154 #define SHT_MIPS_XLATE_DEBUG 0x70000025 155 #define SHT_MIPS_WHIRL 0x70000026 156 #define SHT_MIPS_EH_REGION 0x70000027 157 #define SHT_MIPS_XLATE_OLD 0x70000028 158 #define SHT_MIPS_PDR_EXCEPTION 0x70000029 159 160 #define SHF_MIPS_GPREL 0x10000000 161 #define SHF_MIPS_MERGE 0x20000000 162 #define SHF_MIPS_ADDR 0x40000000 163 #define SHF_MIPS_STRING 0x80000000 164 #define SHF_MIPS_NOSTRIP 0x08000000 165 #define SHF_MIPS_LOCAL 0x04000000 166 #define SHF_MIPS_NAMES 0x02000000 167 #define SHF_MIPS_NODUPES 0x01000000 168 169 #ifndef ELF_ARCH 170 /* ELF register definitions */ 171 #define ELF_NGREG 45 172 #define ELF_NFPREG 33 173 174 typedef unsigned long elf_greg_t; 175 typedef elf_greg_t elf_gregset_t[ELF_NGREG]; 176 177 typedef double elf_fpreg_t; 178 typedef elf_fpreg_t elf_fpregset_t[ELF_NFPREG]; 179 180 struct mips_elf_abiflags_v0 { 181 uint16_t version; /* Version of flags structure */ 182 uint8_t isa_level; /* The level of the ISA: 1-5, 32, 64 */ 183 uint8_t isa_rev; /* The revision of ISA: 0 for MIPS V and below, 184 1-n otherwise */ 185 uint8_t gpr_size; /* The size of general purpose registers */ 186 uint8_t cpr1_size; /* The size of co-processor 1 registers */ 187 uint8_t cpr2_size; /* The size of co-processor 2 registers */ 188 uint8_t fp_abi; /* The floating-point ABI */ 189 uint32_t isa_ext; /* Mask of processor-specific extensions */ 190 uint32_t ases; /* Mask of ASEs used */ 191 uint32_t flags1; /* Mask of general flags */ 192 uint32_t flags2; 193 }; 194 195 #define MIPS_ABI_FP_ANY 0 /* FP ABI doesn't matter */ 196 #define MIPS_ABI_FP_DOUBLE 1 /* -mdouble-float */ 197 #define MIPS_ABI_FP_SINGLE 2 /* -msingle-float */ 198 #define MIPS_ABI_FP_SOFT 3 /* -msoft-float */ 199 #define MIPS_ABI_FP_OLD_64 4 /* -mips32r2 -mfp64 */ 200 #define MIPS_ABI_FP_XX 5 /* -mfpxx */ 201 #define MIPS_ABI_FP_64 6 /* -mips32r2 -mfp64 */ 202 #define MIPS_ABI_FP_64A 7 /* -mips32r2 -mfp64 -mno-odd-spreg */ 203 204 #ifdef CONFIG_32BIT 205 206 /* 207 * In order to be sure that we don't attempt to execute an O32 binary which 208 * requires 64 bit FP (FR=1) on a system which does not support it we refuse 209 * to execute any binary which has bits specified by the following macro set 210 * in its ELF header flags. 211 */ 212 #ifdef CONFIG_MIPS_O32_FP64_SUPPORT 213 # define __MIPS_O32_FP64_MUST_BE_ZERO 0 214 #else 215 # define __MIPS_O32_FP64_MUST_BE_ZERO EF_MIPS_FP64 216 #endif 217 218 /* 219 * This is used to ensure we don't load something for the wrong architecture. 220 */ 221 #define elf_check_arch(hdr) \ 222 ({ \ 223 int __res = 1; \ 224 struct elfhdr *__h = (hdr); \ 225 \ 226 if (__h->e_machine != EM_MIPS) \ 227 __res = 0; \ 228 if (__h->e_ident[EI_CLASS] != ELFCLASS32) \ 229 __res = 0; \ 230 if ((__h->e_flags & EF_MIPS_ABI2) != 0) \ 231 __res = 0; \ 232 if (((__h->e_flags & EF_MIPS_ABI) != 0) && \ 233 ((__h->e_flags & EF_MIPS_ABI) != EF_MIPS_ABI_O32)) \ 234 __res = 0; \ 235 if (__h->e_flags & __MIPS_O32_FP64_MUST_BE_ZERO) \ 236 __res = 0; \ 237 \ 238 __res; \ 239 }) 240 241 /* 242 * These are used to set parameters in the core dumps. 243 */ 244 #define ELF_CLASS ELFCLASS32 245 246 #endif /* CONFIG_32BIT */ 247 248 #ifdef CONFIG_64BIT 249 /* 250 * This is used to ensure we don't load something for the wrong architecture. 251 */ 252 #define elf_check_arch(hdr) \ 253 ({ \ 254 int __res = 1; \ 255 struct elfhdr *__h = (hdr); \ 256 \ 257 if (__h->e_machine != EM_MIPS) \ 258 __res = 0; \ 259 if (__h->e_ident[EI_CLASS] != ELFCLASS64) \ 260 __res = 0; \ 261 \ 262 __res; \ 263 }) 264 265 /* 266 * These are used to set parameters in the core dumps. 267 */ 268 #define ELF_CLASS ELFCLASS64 269 270 #endif /* CONFIG_64BIT */ 271 272 /* 273 * These are used to set parameters in the core dumps. 274 */ 275 #ifdef __MIPSEB__ 276 #define ELF_DATA ELFDATA2MSB 277 #elif defined(__MIPSEL__) 278 #define ELF_DATA ELFDATA2LSB 279 #endif 280 #define ELF_ARCH EM_MIPS 281 282 #endif /* !defined(ELF_ARCH) */ 283 284 struct mips_abi; 285 286 extern struct mips_abi mips_abi; 287 extern struct mips_abi mips_abi_32; 288 extern struct mips_abi mips_abi_n32; 289 290 #ifdef CONFIG_32BIT 291 292 #define SET_PERSONALITY2(ex, state) \ 293 do { \ 294 if (personality(current->personality) != PER_LINUX) \ 295 set_personality(PER_LINUX); \ 296 \ 297 mips_set_personality_fp(state); \ 298 \ 299 current->thread.abi = &mips_abi; \ 300 } while (0) 301 302 #endif /* CONFIG_32BIT */ 303 304 #ifdef CONFIG_64BIT 305 306 #ifdef CONFIG_MIPS32_N32 307 #define __SET_PERSONALITY32_N32() \ 308 do { \ 309 set_thread_flag(TIF_32BIT_ADDR); \ 310 current->thread.abi = &mips_abi_n32; \ 311 } while (0) 312 #else 313 #define __SET_PERSONALITY32_N32() \ 314 do { } while (0) 315 #endif 316 317 #ifdef CONFIG_MIPS32_O32 318 #define __SET_PERSONALITY32_O32(ex, state) \ 319 do { \ 320 set_thread_flag(TIF_32BIT_REGS); \ 321 set_thread_flag(TIF_32BIT_ADDR); \ 322 \ 323 mips_set_personality_fp(state); \ 324 \ 325 current->thread.abi = &mips_abi_32; \ 326 } while (0) 327 #else 328 #define __SET_PERSONALITY32_O32(ex, state) \ 329 do { } while (0) 330 #endif 331 332 #ifdef CONFIG_MIPS32_COMPAT 333 #define __SET_PERSONALITY32(ex, state) \ 334 do { \ 335 if ((((ex).e_flags & EF_MIPS_ABI2) != 0) && \ 336 ((ex).e_flags & EF_MIPS_ABI) == 0) \ 337 __SET_PERSONALITY32_N32(); \ 338 else \ 339 __SET_PERSONALITY32_O32(ex, state); \ 340 } while (0) 341 #else 342 #define __SET_PERSONALITY32(ex, state) do { } while (0) 343 #endif 344 345 #define SET_PERSONALITY2(ex, state) \ 346 do { \ 347 unsigned int p; \ 348 \ 349 clear_thread_flag(TIF_32BIT_REGS); \ 350 clear_thread_flag(TIF_32BIT_FPREGS); \ 351 clear_thread_flag(TIF_HYBRID_FPREGS); \ 352 clear_thread_flag(TIF_32BIT_ADDR); \ 353 \ 354 if ((ex).e_ident[EI_CLASS] == ELFCLASS32) \ 355 __SET_PERSONALITY32(ex, state); \ 356 else \ 357 current->thread.abi = &mips_abi; \ 358 \ 359 p = personality(current->personality); \ 360 if (p != PER_LINUX32 && p != PER_LINUX) \ 361 set_personality(PER_LINUX); \ 362 } while (0) 363 364 #endif /* CONFIG_64BIT */ 365 366 #define CORE_DUMP_USE_REGSET 367 #define ELF_EXEC_PAGESIZE PAGE_SIZE 368 369 /* This yields a mask that user programs can use to figure out what 370 instruction set this cpu supports. This could be done in userspace, 371 but it's not easy, and we've already done it here. */ 372 373 #define ELF_HWCAP (0) 374 375 /* 376 * This yields a string that ld.so will use to load implementation 377 * specific libraries for optimization. This is more specific in 378 * intent than poking at uname or /proc/cpuinfo. 379 */ 380 381 #define ELF_PLATFORM __elf_platform 382 extern const char *__elf_platform; 383 384 /* 385 * See comments in asm-alpha/elf.h, this is the same thing 386 * on the MIPS. 387 */ 388 #define ELF_PLAT_INIT(_r, load_addr) do { \ 389 _r->regs[1] = _r->regs[2] = _r->regs[3] = _r->regs[4] = 0; \ 390 _r->regs[5] = _r->regs[6] = _r->regs[7] = _r->regs[8] = 0; \ 391 _r->regs[9] = _r->regs[10] = _r->regs[11] = _r->regs[12] = 0; \ 392 _r->regs[13] = _r->regs[14] = _r->regs[15] = _r->regs[16] = 0; \ 393 _r->regs[17] = _r->regs[18] = _r->regs[19] = _r->regs[20] = 0; \ 394 _r->regs[21] = _r->regs[22] = _r->regs[23] = _r->regs[24] = 0; \ 395 _r->regs[25] = _r->regs[26] = _r->regs[27] = _r->regs[28] = 0; \ 396 _r->regs[30] = _r->regs[31] = 0; \ 397 } while (0) 398 399 /* This is the location that an ET_DYN program is loaded if exec'ed. Typical 400 use of this is to invoke "./ld.so someprog" to test out a new version of 401 the loader. We need to make sure that it is out of the way of the program 402 that it will "exec", and that there is sufficient room for the brk. */ 403 404 #ifndef ELF_ET_DYN_BASE 405 #define ELF_ET_DYN_BASE (TASK_SIZE / 3 * 2) 406 #endif 407 408 #define ARCH_HAS_SETUP_ADDITIONAL_PAGES 1 409 struct linux_binprm; 410 extern int arch_setup_additional_pages(struct linux_binprm *bprm, 411 int uses_interp); 412 413 struct mm_struct; 414 extern unsigned long arch_randomize_brk(struct mm_struct *mm); 415 #define arch_randomize_brk arch_randomize_brk 416 417 struct arch_elf_state { 418 int fp_abi; 419 int interp_fp_abi; 420 int overall_fp_mode; 421 }; 422 423 #define MIPS_ABI_FP_UNKNOWN (-1) /* Unknown FP ABI (kernel internal) */ 424 425 #define INIT_ARCH_ELF_STATE { \ 426 .fp_abi = MIPS_ABI_FP_UNKNOWN, \ 427 .interp_fp_abi = MIPS_ABI_FP_UNKNOWN, \ 428 .overall_fp_mode = -1, \ 429 } 430 431 extern int arch_elf_pt_proc(void *ehdr, void *phdr, struct file *elf, 432 bool is_interp, struct arch_elf_state *state); 433 434 extern int arch_check_elf(void *ehdr, bool has_interpreter, 435 struct arch_elf_state *state); 436 437 extern void mips_set_personality_fp(struct arch_elf_state *state); 438 439 #endif /* _ASM_ELF_H */ 440