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 #define EF_MIPS_ARCH_32R6 0x90000000 /* MIPS32 R6 code. */ 26 #define EF_MIPS_ARCH_64R6 0xa0000000 /* MIPS64 R6 code. */ 27 28 /* The ABI of a file. */ 29 #define EF_MIPS_ABI_O32 0x00001000 /* O32 ABI. */ 30 #define EF_MIPS_ABI_O64 0x00002000 /* O32 extended for 64 bit. */ 31 32 #define PT_MIPS_REGINFO 0x70000000 33 #define PT_MIPS_RTPROC 0x70000001 34 #define PT_MIPS_OPTIONS 0x70000002 35 #define PT_MIPS_ABIFLAGS 0x70000003 36 37 /* Flags in the e_flags field of the header */ 38 #define EF_MIPS_NOREORDER 0x00000001 39 #define EF_MIPS_PIC 0x00000002 40 #define EF_MIPS_CPIC 0x00000004 41 #define EF_MIPS_ABI2 0x00000020 42 #define EF_MIPS_OPTIONS_FIRST 0x00000080 43 #define EF_MIPS_32BITMODE 0x00000100 44 #define EF_MIPS_32BITMODE_FP64 0x00000200 45 #define EF_MIPS_ABI 0x0000f000 46 #define EF_MIPS_ARCH 0xf0000000 47 48 #define DT_MIPS_RLD_VERSION 0x70000001 49 #define DT_MIPS_TIME_STAMP 0x70000002 50 #define DT_MIPS_ICHECKSUM 0x70000003 51 #define DT_MIPS_IVERSION 0x70000004 52 #define DT_MIPS_FLAGS 0x70000005 53 #define RHF_NONE 0x00000000 54 #define RHF_HARDWAY 0x00000001 55 #define RHF_NOTPOT 0x00000002 56 #define RHF_SGI_ONLY 0x00000010 57 #define DT_MIPS_BASE_ADDRESS 0x70000006 58 #define DT_MIPS_CONFLICT 0x70000008 59 #define DT_MIPS_LIBLIST 0x70000009 60 #define DT_MIPS_LOCAL_GOTNO 0x7000000a 61 #define DT_MIPS_CONFLICTNO 0x7000000b 62 #define DT_MIPS_LIBLISTNO 0x70000010 63 #define DT_MIPS_SYMTABNO 0x70000011 64 #define DT_MIPS_UNREFEXTNO 0x70000012 65 #define DT_MIPS_GOTSYM 0x70000013 66 #define DT_MIPS_HIPAGENO 0x70000014 67 #define DT_MIPS_RLD_MAP 0x70000016 68 69 #define R_MIPS_NONE 0 70 #define R_MIPS_16 1 71 #define R_MIPS_32 2 72 #define R_MIPS_REL32 3 73 #define R_MIPS_26 4 74 #define R_MIPS_HI16 5 75 #define R_MIPS_LO16 6 76 #define R_MIPS_GPREL16 7 77 #define R_MIPS_LITERAL 8 78 #define R_MIPS_GOT16 9 79 #define R_MIPS_PC16 10 80 #define R_MIPS_CALL16 11 81 #define R_MIPS_GPREL32 12 82 /* The remaining relocs are defined on Irix, although they are not 83 in the MIPS ELF ABI. */ 84 #define R_MIPS_UNUSED1 13 85 #define R_MIPS_UNUSED2 14 86 #define R_MIPS_UNUSED3 15 87 #define R_MIPS_SHIFT5 16 88 #define R_MIPS_SHIFT6 17 89 #define R_MIPS_64 18 90 #define R_MIPS_GOT_DISP 19 91 #define R_MIPS_GOT_PAGE 20 92 #define R_MIPS_GOT_OFST 21 93 /* 94 * The following two relocation types are specified in the MIPS ABI 95 * conformance guide version 1.2 but not yet in the psABI. 96 */ 97 #define R_MIPS_GOTHI16 22 98 #define R_MIPS_GOTLO16 23 99 #define R_MIPS_SUB 24 100 #define R_MIPS_INSERT_A 25 101 #define R_MIPS_INSERT_B 26 102 #define R_MIPS_DELETE 27 103 #define R_MIPS_HIGHER 28 104 #define R_MIPS_HIGHEST 29 105 /* 106 * The following two relocation types are specified in the MIPS ABI 107 * conformance guide version 1.2 but not yet in the psABI. 108 */ 109 #define R_MIPS_CALLHI16 30 110 #define R_MIPS_CALLLO16 31 111 /* 112 * This range is reserved for vendor specific relocations. 113 */ 114 #define R_MIPS_LOVENDOR 100 115 #define R_MIPS_HIVENDOR 127 116 117 #define SHN_MIPS_ACCOMON 0xff00 /* Allocated common symbols */ 118 #define SHN_MIPS_TEXT 0xff01 /* Allocated test symbols. */ 119 #define SHN_MIPS_DATA 0xff02 /* Allocated data symbols. */ 120 #define SHN_MIPS_SCOMMON 0xff03 /* Small common symbols */ 121 #define SHN_MIPS_SUNDEFINED 0xff04 /* Small undefined symbols */ 122 123 #define SHT_MIPS_LIST 0x70000000 124 #define SHT_MIPS_CONFLICT 0x70000002 125 #define SHT_MIPS_GPTAB 0x70000003 126 #define SHT_MIPS_UCODE 0x70000004 127 #define SHT_MIPS_DEBUG 0x70000005 128 #define SHT_MIPS_REGINFO 0x70000006 129 #define SHT_MIPS_PACKAGE 0x70000007 130 #define SHT_MIPS_PACKSYM 0x70000008 131 #define SHT_MIPS_RELD 0x70000009 132 #define SHT_MIPS_IFACE 0x7000000b 133 #define SHT_MIPS_CONTENT 0x7000000c 134 #define SHT_MIPS_OPTIONS 0x7000000d 135 #define SHT_MIPS_SHDR 0x70000010 136 #define SHT_MIPS_FDESC 0x70000011 137 #define SHT_MIPS_EXTSYM 0x70000012 138 #define SHT_MIPS_DENSE 0x70000013 139 #define SHT_MIPS_PDESC 0x70000014 140 #define SHT_MIPS_LOCSYM 0x70000015 141 #define SHT_MIPS_AUXSYM 0x70000016 142 #define SHT_MIPS_OPTSYM 0x70000017 143 #define SHT_MIPS_LOCSTR 0x70000018 144 #define SHT_MIPS_LINE 0x70000019 145 #define SHT_MIPS_RFDESC 0x7000001a 146 #define SHT_MIPS_DELTASYM 0x7000001b 147 #define SHT_MIPS_DELTAINST 0x7000001c 148 #define SHT_MIPS_DELTACLASS 0x7000001d 149 #define SHT_MIPS_DWARF 0x7000001e 150 #define SHT_MIPS_DELTADECL 0x7000001f 151 #define SHT_MIPS_SYMBOL_LIB 0x70000020 152 #define SHT_MIPS_EVENTS 0x70000021 153 #define SHT_MIPS_TRANSLATE 0x70000022 154 #define SHT_MIPS_PIXIE 0x70000023 155 #define SHT_MIPS_XLATE 0x70000024 156 #define SHT_MIPS_XLATE_DEBUG 0x70000025 157 #define SHT_MIPS_WHIRL 0x70000026 158 #define SHT_MIPS_EH_REGION 0x70000027 159 #define SHT_MIPS_XLATE_OLD 0x70000028 160 #define SHT_MIPS_PDR_EXCEPTION 0x70000029 161 162 #define SHF_MIPS_GPREL 0x10000000 163 #define SHF_MIPS_MERGE 0x20000000 164 #define SHF_MIPS_ADDR 0x40000000 165 #define SHF_MIPS_STRING 0x80000000 166 #define SHF_MIPS_NOSTRIP 0x08000000 167 #define SHF_MIPS_LOCAL 0x04000000 168 #define SHF_MIPS_NAMES 0x02000000 169 #define SHF_MIPS_NODUPES 0x01000000 170 171 #ifndef ELF_ARCH 172 /* ELF register definitions */ 173 #define ELF_NGREG 45 174 #define ELF_NFPREG 33 175 176 typedef unsigned long elf_greg_t; 177 typedef elf_greg_t elf_gregset_t[ELF_NGREG]; 178 179 typedef double elf_fpreg_t; 180 typedef elf_fpreg_t elf_fpregset_t[ELF_NFPREG]; 181 182 struct mips_elf_abiflags_v0 { 183 uint16_t version; /* Version of flags structure */ 184 uint8_t isa_level; /* The level of the ISA: 1-5, 32, 64 */ 185 uint8_t isa_rev; /* The revision of ISA: 0 for MIPS V and below, 186 1-n otherwise */ 187 uint8_t gpr_size; /* The size of general purpose registers */ 188 uint8_t cpr1_size; /* The size of co-processor 1 registers */ 189 uint8_t cpr2_size; /* The size of co-processor 2 registers */ 190 uint8_t fp_abi; /* The floating-point ABI */ 191 uint32_t isa_ext; /* Mask of processor-specific extensions */ 192 uint32_t ases; /* Mask of ASEs used */ 193 uint32_t flags1; /* Mask of general flags */ 194 uint32_t flags2; 195 }; 196 197 #define MIPS_ABI_FP_UNKNOWN (-1) /* Unknown FP ABI (kernel internal) */ 198 #define MIPS_ABI_FP_NXX (-2) /* any nXX ABI */ 199 #define FP_DOUBLE_64A (-3) /* DOUBLE + 64A */ 200 #define FP_ERROR (-4) /* ERROR in match */ 201 202 #define MIPS_ABI_FP_ANY 0 /* FP ABI doesn't matter */ 203 #define MIPS_ABI_FP_DOUBLE 1 /* -mdouble-float */ 204 #define MIPS_ABI_FP_SINGLE 2 /* -msingle-float */ 205 #define MIPS_ABI_FP_SOFT 3 /* -msoft-float */ 206 #define MIPS_ABI_FP_OLD_64 4 /* -mips32r2 -mfp64 */ 207 #define MIPS_ABI_FP_XX 5 /* -mfpxx */ 208 #define MIPS_ABI_FP_64 6 /* -mips32r2 -mfp64 */ 209 #define MIPS_ABI_FP_64A 7 /* -mips32r2 -mfp64 -mno-odd-spreg */ 210 #define MIPS_ABI_FP_MAX 8 211 212 #ifdef CONFIG_32BIT 213 214 /* 215 * This is used to ensure we don't load something for the wrong architecture. 216 */ 217 #define elf_check_arch(hdr) \ 218 ({ \ 219 int __res = 1; \ 220 struct elfhdr *__h = (hdr); \ 221 \ 222 if (__h->e_machine != EM_MIPS) \ 223 __res = 0; \ 224 if (__h->e_ident[EI_CLASS] != ELFCLASS32) \ 225 __res = 0; \ 226 if ((__h->e_flags & EF_MIPS_ABI2) != 0) \ 227 __res = 0; \ 228 if (((__h->e_flags & EF_MIPS_ABI) != 0) && \ 229 ((__h->e_flags & EF_MIPS_ABI) != EF_MIPS_ABI_O32)) \ 230 __res = 0; \ 231 \ 232 __res; \ 233 }) 234 235 /* 236 * These are used to set parameters in the core dumps. 237 */ 238 #define ELF_CLASS ELFCLASS32 239 240 #endif /* CONFIG_32BIT */ 241 242 #ifdef CONFIG_64BIT 243 /* 244 * This is used to ensure we don't load something for the wrong architecture. 245 */ 246 #define elf_check_arch(hdr) \ 247 ({ \ 248 int __res = 1; \ 249 struct elfhdr *__h = (hdr); \ 250 \ 251 if (__h->e_machine != EM_MIPS) \ 252 __res = 0; \ 253 if (__h->e_ident[EI_CLASS] != ELFCLASS64) \ 254 __res = 0; \ 255 \ 256 __res; \ 257 }) 258 259 /* 260 * These are used to set parameters in the core dumps. 261 */ 262 #define ELF_CLASS ELFCLASS64 263 264 #endif /* CONFIG_64BIT */ 265 266 /* 267 * Ensure we don't load the incompatible architecture lib via uselib() - 268 * - verify FPU model. 269 */ 270 #define elf_lib_check_arch(hdr) \ 271 ({ \ 272 int __res = 1; \ 273 struct elfhdr *__h = (hdr); \ 274 \ 275 if (!test_thread_local_flags(LTIF_FPU_FR)) { \ 276 if ((__h->e_flags & EF_MIPS_ABI2) != 0) \ 277 __res = 0; \ 278 if (((__h->e_flags & EF_MIPS_ABI) != 0) && \ 279 ((__h->e_flags & EF_MIPS_ABI) != EF_MIPS_ABI_O32)) \ 280 __res = 0; \ 281 if (__h->e_flags & EF_MIPS_32BITMODE_FP64) \ 282 __res = 0; \ 283 } else { \ 284 if (((__h->e_flags & EF_MIPS_ABI) == 0) || \ 285 ((__h->e_flags & EF_MIPS_ABI) == EF_MIPS_ABI_O32)) \ 286 if (!(__h->e_flags & EF_MIPS_32BITMODE_FP64)) \ 287 __res = 0; \ 288 } \ 289 __res; \ 290 }) 291 292 /* 293 * These are used to set parameters in the core dumps. 294 */ 295 #ifdef __MIPSEB__ 296 #define ELF_DATA ELFDATA2MSB 297 #elif defined(__MIPSEL__) 298 #define ELF_DATA ELFDATA2LSB 299 #endif 300 #define ELF_ARCH EM_MIPS 301 302 #endif /* !defined(ELF_ARCH) */ 303 304 struct mips_abi; 305 306 extern struct mips_abi mips_abi; 307 extern struct mips_abi mips_abi_32; 308 extern struct mips_abi mips_abi_n32; 309 310 #ifdef CONFIG_32BIT 311 312 #define SET_PERSONALITY2(ex, state) \ 313 do { \ 314 if (personality(current->personality) != PER_LINUX) \ 315 set_personality(PER_LINUX); \ 316 \ 317 mips_set_personality_fp(state); \ 318 \ 319 current->thread.abi = &mips_abi; \ 320 } while (0) 321 322 #endif /* CONFIG_32BIT */ 323 324 #ifdef CONFIG_64BIT 325 326 #ifdef CONFIG_MIPS32_N32 327 #define __SET_PERSONALITY32_N32() \ 328 do { \ 329 set_thread_local_flags(LTIF_FPU_FR); \ 330 clear_thread_local_flags(LTIF_FPU_FRE); \ 331 clear_thread_flag(TIF_32BIT_REGS); \ 332 set_thread_flag(TIF_32BIT_ADDR); \ 333 current->thread.abi = &mips_abi_n32; \ 334 } while (0) 335 #else 336 #define __SET_PERSONALITY32_N32() \ 337 do { } while (0) 338 #endif 339 340 #ifdef CONFIG_MIPS32_O32 341 #define __SET_PERSONALITY32_O32(ex, state) \ 342 do { \ 343 if ((ex).e_flags & EF_MIPS_32BITMODE_FP64) \ 344 set_thread_local_flags(LTIF_FPU_FR); \ 345 else \ 346 clear_thread_local_flags(LTIF_FPU_FR); \ 347 clear_thread_local_flags(LTIF_FPU_FRE); \ 348 \ 349 set_thread_flag(TIF_32BIT_REGS); \ 350 set_thread_flag(TIF_32BIT_ADDR); \ 351 \ 352 mips_set_personality_fp(state); \ 353 \ 354 current->thread.abi = &mips_abi_32; \ 355 } while (0) 356 #else 357 #define __SET_PERSONALITY32_O32(ex, state) \ 358 do { } while (0) 359 #endif 360 361 #ifdef CONFIG_MIPS32_COMPAT 362 #define __SET_PERSONALITY32(ex, state) \ 363 do { \ 364 if ((((ex).e_flags & EF_MIPS_ABI2) != 0) && \ 365 ((ex).e_flags & EF_MIPS_ABI) == 0) \ 366 __SET_PERSONALITY32_N32(); \ 367 else \ 368 __SET_PERSONALITY32_O32(ex, state); \ 369 } while (0) 370 #else 371 #define __SET_PERSONALITY32(ex, state) do { } while (0) 372 #endif 373 374 #define SET_PERSONALITY2(ex, state) \ 375 do { \ 376 unsigned int p; \ 377 \ 378 set_thread_local_flags(LTIF_FPU_FR); \ 379 clear_thread_local_flags(LTIF_FPU_FRE); \ 380 clear_thread_flag(TIF_32BIT_REGS); \ 381 clear_thread_flag(TIF_32BIT_ADDR); \ 382 \ 383 if ((ex).e_ident[EI_CLASS] == ELFCLASS32) \ 384 __SET_PERSONALITY32(ex, state); \ 385 else \ 386 current->thread.abi = &mips_abi; \ 387 \ 388 p = personality(current->personality); \ 389 if (p != PER_LINUX32 && p != PER_LINUX) \ 390 set_personality(PER_LINUX); \ 391 } while (0) 392 393 #endif /* CONFIG_64BIT */ 394 395 #define CORE_DUMP_USE_REGSET 396 #define ELF_EXEC_PAGESIZE PAGE_SIZE 397 398 /* This yields a mask that user programs can use to figure out what 399 instruction set this cpu supports. This could be done in userspace, 400 but it's not easy, and we've already done it here. */ 401 402 #define ELF_HWCAP (elf_hwcap) 403 extern unsigned int elf_hwcap; 404 #include <asm/hwcap.h> 405 406 /* 407 * This yields a string that ld.so will use to load implementation 408 * specific libraries for optimization. This is more specific in 409 * intent than poking at uname or /proc/cpuinfo. 410 */ 411 412 #define ELF_PLATFORM __elf_platform 413 extern const char *__elf_platform; 414 415 /* 416 * See comments in asm-alpha/elf.h, this is the same thing 417 * on the MIPS. 418 */ 419 #define ELF_PLAT_INIT(_r, load_addr) do { \ 420 _r->regs[1] = _r->regs[2] = _r->regs[3] = _r->regs[4] = 0; \ 421 _r->regs[5] = _r->regs[6] = _r->regs[7] = _r->regs[8] = 0; \ 422 _r->regs[9] = _r->regs[10] = _r->regs[11] = _r->regs[12] = 0; \ 423 _r->regs[13] = _r->regs[14] = _r->regs[15] = _r->regs[16] = 0; \ 424 _r->regs[17] = _r->regs[18] = _r->regs[19] = _r->regs[20] = 0; \ 425 _r->regs[21] = _r->regs[22] = _r->regs[23] = _r->regs[24] = 0; \ 426 _r->regs[25] = _r->regs[26] = _r->regs[27] = _r->regs[28] = 0; \ 427 _r->regs[30] = _r->regs[31] = 0; \ 428 } while (0) 429 430 /* This is the location that an ET_DYN program is loaded if exec'ed. Typical 431 use of this is to invoke "./ld.so someprog" to test out a new version of 432 the loader. We need to make sure that it is out of the way of the program 433 that it will "exec", and that there is sufficient room for the brk. */ 434 435 #ifndef ELF_ET_DYN_BASE 436 #define ELF_ET_DYN_BASE (TASK_SIZE / 3 * 2) 437 #endif 438 439 #define ARCH_HAS_SETUP_ADDITIONAL_PAGES 1 440 struct linux_binprm; 441 extern int arch_setup_additional_pages(struct linux_binprm *bprm, 442 int uses_interp); 443 444 struct mm_struct; 445 extern unsigned long arch_randomize_brk(struct mm_struct *mm); 446 #define arch_randomize_brk arch_randomize_brk 447 448 /* duplicate */ 449 #define MIPS_ABI_FP_UNKNOWN (-1) /* Unknown FP ABI (kernel internal) */ 450 451 struct arch_elf_state { 452 int fp_abi; 453 int interp_fp_abi; 454 int overall_abi; 455 }; 456 457 #define INIT_ARCH_ELF_STATE { \ 458 .fp_abi = MIPS_ABI_FP_UNKNOWN, \ 459 .interp_fp_abi = MIPS_ABI_FP_UNKNOWN, \ 460 .overall_abi = MIPS_ABI_FP_UNKNOWN, \ 461 } 462 463 extern int arch_elf_pt_proc(void *ehdr, void *phdr, struct file *elf, 464 bool is_interp, struct arch_elf_state *state); 465 466 extern int arch_check_elf(void *ehdr, bool has_interpreter, 467 struct arch_elf_state *state); 468 469 extern void mips_set_personality_fp(struct arch_elf_state *state); 470 471 #endif /* _ASM_ELF_H */ 472