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/auxvec.h> 12 #include <linux/fs.h> 13 #include <linux/mm_types.h> 14 15 #include <uapi/linux/elf.h> 16 17 #include <asm/current.h> 18 19 /* ELF header e_flags defines. */ 20 /* MIPS architecture level. */ 21 #define EF_MIPS_ARCH_1 0x00000000 /* -mips1 code. */ 22 #define EF_MIPS_ARCH_2 0x10000000 /* -mips2 code. */ 23 #define EF_MIPS_ARCH_3 0x20000000 /* -mips3 code. */ 24 #define EF_MIPS_ARCH_4 0x30000000 /* -mips4 code. */ 25 #define EF_MIPS_ARCH_5 0x40000000 /* -mips5 code. */ 26 #define EF_MIPS_ARCH_32 0x50000000 /* MIPS32 code. */ 27 #define EF_MIPS_ARCH_64 0x60000000 /* MIPS64 code. */ 28 #define EF_MIPS_ARCH_32R2 0x70000000 /* MIPS32 R2 code. */ 29 #define EF_MIPS_ARCH_64R2 0x80000000 /* MIPS64 R2 code. */ 30 31 /* The ABI of a file. */ 32 #define EF_MIPS_ABI_O32 0x00001000 /* O32 ABI. */ 33 #define EF_MIPS_ABI_O64 0x00002000 /* O32 extended for 64 bit. */ 34 35 #define PT_MIPS_REGINFO 0x70000000 36 #define PT_MIPS_RTPROC 0x70000001 37 #define PT_MIPS_OPTIONS 0x70000002 38 #define PT_MIPS_ABIFLAGS 0x70000003 39 40 /* Flags in the e_flags field of the header */ 41 #define EF_MIPS_NOREORDER 0x00000001 42 #define EF_MIPS_PIC 0x00000002 43 #define EF_MIPS_CPIC 0x00000004 44 #define EF_MIPS_ABI2 0x00000020 45 #define EF_MIPS_OPTIONS_FIRST 0x00000080 46 #define EF_MIPS_32BITMODE 0x00000100 47 #define EF_MIPS_FP64 0x00000200 48 #define EF_MIPS_NAN2008 0x00000400 49 #define EF_MIPS_ABI 0x0000f000 50 #define EF_MIPS_ARCH 0xf0000000 51 52 #define DT_MIPS_RLD_VERSION 0x70000001 53 #define DT_MIPS_TIME_STAMP 0x70000002 54 #define DT_MIPS_ICHECKSUM 0x70000003 55 #define DT_MIPS_IVERSION 0x70000004 56 #define DT_MIPS_FLAGS 0x70000005 57 #define RHF_NONE 0x00000000 58 #define RHF_HARDWAY 0x00000001 59 #define RHF_NOTPOT 0x00000002 60 #define RHF_SGI_ONLY 0x00000010 61 #define DT_MIPS_BASE_ADDRESS 0x70000006 62 #define DT_MIPS_CONFLICT 0x70000008 63 #define DT_MIPS_LIBLIST 0x70000009 64 #define DT_MIPS_LOCAL_GOTNO 0x7000000a 65 #define DT_MIPS_CONFLICTNO 0x7000000b 66 #define DT_MIPS_LIBLISTNO 0x70000010 67 #define DT_MIPS_SYMTABNO 0x70000011 68 #define DT_MIPS_UNREFEXTNO 0x70000012 69 #define DT_MIPS_GOTSYM 0x70000013 70 #define DT_MIPS_HIPAGENO 0x70000014 71 #define DT_MIPS_RLD_MAP 0x70000016 72 73 #define R_MIPS_NONE 0 74 #define R_MIPS_16 1 75 #define R_MIPS_32 2 76 #define R_MIPS_REL32 3 77 #define R_MIPS_26 4 78 #define R_MIPS_HI16 5 79 #define R_MIPS_LO16 6 80 #define R_MIPS_GPREL16 7 81 #define R_MIPS_LITERAL 8 82 #define R_MIPS_GOT16 9 83 #define R_MIPS_PC16 10 84 #define R_MIPS_CALL16 11 85 #define R_MIPS_GPREL32 12 86 /* The remaining relocs are defined on Irix, although they are not 87 in the MIPS ELF ABI. */ 88 #define R_MIPS_UNUSED1 13 89 #define R_MIPS_UNUSED2 14 90 #define R_MIPS_UNUSED3 15 91 #define R_MIPS_SHIFT5 16 92 #define R_MIPS_SHIFT6 17 93 #define R_MIPS_64 18 94 #define R_MIPS_GOT_DISP 19 95 #define R_MIPS_GOT_PAGE 20 96 #define R_MIPS_GOT_OFST 21 97 /* 98 * The following two relocation types are specified in the MIPS ABI 99 * conformance guide version 1.2 but not yet in the psABI. 100 */ 101 #define R_MIPS_GOTHI16 22 102 #define R_MIPS_GOTLO16 23 103 #define R_MIPS_SUB 24 104 #define R_MIPS_INSERT_A 25 105 #define R_MIPS_INSERT_B 26 106 #define R_MIPS_DELETE 27 107 #define R_MIPS_HIGHER 28 108 #define R_MIPS_HIGHEST 29 109 /* 110 * The following two relocation types are specified in the MIPS ABI 111 * conformance guide version 1.2 but not yet in the psABI. 112 */ 113 #define R_MIPS_CALLHI16 30 114 #define R_MIPS_CALLLO16 31 115 /* 116 * Introduced for MIPSr6. 117 */ 118 #define R_MIPS_PC21_S2 60 119 #define R_MIPS_PC26_S2 61 120 /* 121 * This range is reserved for vendor specific relocations. 122 */ 123 #define R_MIPS_LOVENDOR 100 124 #define R_MIPS_HIVENDOR 127 125 126 #define R_MIPS_PC32 248 127 128 #define SHN_MIPS_ACCOMON 0xff00 /* Allocated common symbols */ 129 #define SHN_MIPS_TEXT 0xff01 /* Allocated test symbols. */ 130 #define SHN_MIPS_DATA 0xff02 /* Allocated data symbols. */ 131 #define SHN_MIPS_SCOMMON 0xff03 /* Small common symbols */ 132 #define SHN_MIPS_SUNDEFINED 0xff04 /* Small undefined symbols */ 133 134 #define SHT_MIPS_LIST 0x70000000 135 #define SHT_MIPS_CONFLICT 0x70000002 136 #define SHT_MIPS_GPTAB 0x70000003 137 #define SHT_MIPS_UCODE 0x70000004 138 #define SHT_MIPS_DEBUG 0x70000005 139 #define SHT_MIPS_REGINFO 0x70000006 140 #define SHT_MIPS_PACKAGE 0x70000007 141 #define SHT_MIPS_PACKSYM 0x70000008 142 #define SHT_MIPS_RELD 0x70000009 143 #define SHT_MIPS_IFACE 0x7000000b 144 #define SHT_MIPS_CONTENT 0x7000000c 145 #define SHT_MIPS_OPTIONS 0x7000000d 146 #define SHT_MIPS_SHDR 0x70000010 147 #define SHT_MIPS_FDESC 0x70000011 148 #define SHT_MIPS_EXTSYM 0x70000012 149 #define SHT_MIPS_DENSE 0x70000013 150 #define SHT_MIPS_PDESC 0x70000014 151 #define SHT_MIPS_LOCSYM 0x70000015 152 #define SHT_MIPS_AUXSYM 0x70000016 153 #define SHT_MIPS_OPTSYM 0x70000017 154 #define SHT_MIPS_LOCSTR 0x70000018 155 #define SHT_MIPS_LINE 0x70000019 156 #define SHT_MIPS_RFDESC 0x7000001a 157 #define SHT_MIPS_DELTASYM 0x7000001b 158 #define SHT_MIPS_DELTAINST 0x7000001c 159 #define SHT_MIPS_DELTACLASS 0x7000001d 160 #define SHT_MIPS_DWARF 0x7000001e 161 #define SHT_MIPS_DELTADECL 0x7000001f 162 #define SHT_MIPS_SYMBOL_LIB 0x70000020 163 #define SHT_MIPS_EVENTS 0x70000021 164 #define SHT_MIPS_TRANSLATE 0x70000022 165 #define SHT_MIPS_PIXIE 0x70000023 166 #define SHT_MIPS_XLATE 0x70000024 167 #define SHT_MIPS_XLATE_DEBUG 0x70000025 168 #define SHT_MIPS_WHIRL 0x70000026 169 #define SHT_MIPS_EH_REGION 0x70000027 170 #define SHT_MIPS_XLATE_OLD 0x70000028 171 #define SHT_MIPS_PDR_EXCEPTION 0x70000029 172 173 #define SHF_MIPS_GPREL 0x10000000 174 #define SHF_MIPS_MERGE 0x20000000 175 #define SHF_MIPS_ADDR 0x40000000 176 #define SHF_MIPS_STRING 0x80000000 177 #define SHF_MIPS_NOSTRIP 0x08000000 178 #define SHF_MIPS_LOCAL 0x04000000 179 #define SHF_MIPS_NAMES 0x02000000 180 #define SHF_MIPS_NODUPES 0x01000000 181 182 #define MIPS_ABI_FP_ANY 0 /* FP ABI doesn't matter */ 183 #define MIPS_ABI_FP_DOUBLE 1 /* -mdouble-float */ 184 #define MIPS_ABI_FP_SINGLE 2 /* -msingle-float */ 185 #define MIPS_ABI_FP_SOFT 3 /* -msoft-float */ 186 #define MIPS_ABI_FP_OLD_64 4 /* -mips32r2 -mfp64 */ 187 #define MIPS_ABI_FP_XX 5 /* -mfpxx */ 188 #define MIPS_ABI_FP_64 6 /* -mips32r2 -mfp64 */ 189 #define MIPS_ABI_FP_64A 7 /* -mips32r2 -mfp64 -mno-odd-spreg */ 190 191 struct mips_elf_abiflags_v0 { 192 uint16_t version; /* Version of flags structure */ 193 uint8_t isa_level; /* The level of the ISA: 1-5, 32, 64 */ 194 uint8_t isa_rev; /* The revision of ISA: 0 for MIPS V and below, 195 1-n otherwise */ 196 uint8_t gpr_size; /* The size of general purpose registers */ 197 uint8_t cpr1_size; /* The size of co-processor 1 registers */ 198 uint8_t cpr2_size; /* The size of co-processor 2 registers */ 199 uint8_t fp_abi; /* The floating-point ABI */ 200 uint32_t isa_ext; /* Mask of processor-specific extensions */ 201 uint32_t ases; /* Mask of ASEs used */ 202 uint32_t flags1; /* Mask of general flags */ 203 uint32_t flags2; 204 }; 205 206 /* ELF register definitions */ 207 #define ELF_NGREG 45 208 #define ELF_NFPREG 33 209 210 typedef unsigned long elf_greg_t; 211 typedef elf_greg_t elf_gregset_t[ELF_NGREG]; 212 213 typedef double elf_fpreg_t; 214 typedef elf_fpreg_t elf_fpregset_t[ELF_NFPREG]; 215 216 void mips_dump_regs32(u32 *uregs, const struct pt_regs *regs); 217 void mips_dump_regs64(u64 *uregs, const struct pt_regs *regs); 218 219 #ifdef CONFIG_32BIT 220 /* 221 * This is used to ensure we don't load something for the wrong architecture. 222 */ 223 #define elf_check_arch elf32_check_arch 224 225 /* 226 * These are used to set parameters in the core dumps. 227 */ 228 #define ELF_CLASS ELFCLASS32 229 230 #define ELF_CORE_COPY_REGS(dest, regs) \ 231 mips_dump_regs32((u32 *)&(dest), (regs)); 232 233 #endif /* CONFIG_32BIT */ 234 235 #ifdef CONFIG_64BIT 236 /* 237 * This is used to ensure we don't load something for the wrong architecture. 238 */ 239 #define elf_check_arch elf64_check_arch 240 #define compat_elf_check_arch elf32_check_arch 241 242 /* 243 * These are used to set parameters in the core dumps. 244 */ 245 #define ELF_CLASS ELFCLASS64 246 247 #define ELF_CORE_COPY_REGS(dest, regs) \ 248 mips_dump_regs64((u64 *)&(dest), (regs)); 249 250 #endif /* CONFIG_64BIT */ 251 252 /* 253 * These are used to set parameters in the core dumps. 254 */ 255 #ifdef __MIPSEB__ 256 #define ELF_DATA ELFDATA2MSB 257 #elif defined(__MIPSEL__) 258 #define ELF_DATA ELFDATA2LSB 259 #endif 260 #define ELF_ARCH EM_MIPS 261 262 /* 263 * In order to be sure that we don't attempt to execute an O32 binary which 264 * requires 64 bit FP (FR=1) on a system which does not support it we refuse 265 * to execute any binary which has bits specified by the following macro set 266 * in its ELF header flags. 267 */ 268 #ifdef CONFIG_MIPS_O32_FP64_SUPPORT 269 # define __MIPS_O32_FP64_MUST_BE_ZERO 0 270 #else 271 # define __MIPS_O32_FP64_MUST_BE_ZERO EF_MIPS_FP64 272 #endif 273 274 #define mips_elf_check_machine(x) ((x)->e_machine == EM_MIPS) 275 276 #define vmcore_elf32_check_arch mips_elf_check_machine 277 #define vmcore_elf64_check_arch mips_elf_check_machine 278 279 /* 280 * Return non-zero if HDR identifies an o32 or n32 ELF binary. 281 */ 282 #define elf32_check_arch(hdr) \ 283 ({ \ 284 int __res = 1; \ 285 struct elfhdr *__h = (hdr); \ 286 \ 287 if (!mips_elf_check_machine(__h)) \ 288 __res = 0; \ 289 if (__h->e_ident[EI_CLASS] != ELFCLASS32) \ 290 __res = 0; \ 291 if ((__h->e_flags & EF_MIPS_ABI2) != 0) { \ 292 if (!IS_ENABLED(CONFIG_MIPS32_N32) || \ 293 (__h->e_flags & EF_MIPS_ABI)) \ 294 __res = 0; \ 295 } else { \ 296 if (IS_ENABLED(CONFIG_64BIT) && !IS_ENABLED(CONFIG_MIPS32_O32)) \ 297 __res = 0; \ 298 if (((__h->e_flags & EF_MIPS_ABI) != 0) && \ 299 ((__h->e_flags & EF_MIPS_ABI) != EF_MIPS_ABI_O32)) \ 300 __res = 0; \ 301 if (__h->e_flags & __MIPS_O32_FP64_MUST_BE_ZERO) \ 302 __res = 0; \ 303 } \ 304 __res; \ 305 }) 306 307 /* 308 * Return non-zero if HDR identifies an n64 ELF binary. 309 */ 310 #define elf64_check_arch(hdr) \ 311 ({ \ 312 int __res = 1; \ 313 struct elfhdr *__h = (hdr); \ 314 \ 315 if (!mips_elf_check_machine(__h)) \ 316 __res = 0; \ 317 if (__h->e_ident[EI_CLASS] != ELFCLASS64) \ 318 __res = 0; \ 319 \ 320 __res; \ 321 }) 322 323 struct mips_abi; 324 325 extern struct mips_abi mips_abi; 326 extern struct mips_abi mips_abi_32; 327 extern struct mips_abi mips_abi_n32; 328 329 #ifdef CONFIG_32BIT 330 331 #define SET_PERSONALITY2(ex, state) \ 332 do { \ 333 clear_thread_flag(TIF_HYBRID_FPREGS); \ 334 set_thread_flag(TIF_32BIT_FPREGS); \ 335 \ 336 current->thread.abi = &mips_abi; \ 337 \ 338 mips_set_personality_fp(state); \ 339 mips_set_personality_nan(state); \ 340 \ 341 if (personality(current->personality) != PER_LINUX) \ 342 set_personality(PER_LINUX); \ 343 } while (0) 344 345 #endif /* CONFIG_32BIT */ 346 347 #ifdef CONFIG_64BIT 348 349 #ifdef CONFIG_MIPS32_N32 350 #define __SET_PERSONALITY32_N32() \ 351 do { \ 352 set_thread_flag(TIF_32BIT_ADDR); \ 353 \ 354 current->thread.abi = &mips_abi_n32; \ 355 } while (0) 356 #else 357 #define __SET_PERSONALITY32_N32() \ 358 do { } while (0) 359 #endif 360 361 #ifdef CONFIG_MIPS32_O32 362 #define __SET_PERSONALITY32_O32(ex, state) \ 363 do { \ 364 set_thread_flag(TIF_32BIT_REGS); \ 365 set_thread_flag(TIF_32BIT_ADDR); \ 366 clear_thread_flag(TIF_HYBRID_FPREGS); \ 367 set_thread_flag(TIF_32BIT_FPREGS); \ 368 \ 369 current->thread.abi = &mips_abi_32; \ 370 \ 371 mips_set_personality_fp(state); \ 372 } while (0) 373 #else 374 #define __SET_PERSONALITY32_O32(ex, state) \ 375 do { } while (0) 376 #endif 377 378 #ifdef CONFIG_MIPS32_COMPAT 379 #define __SET_PERSONALITY32(ex, state) \ 380 do { \ 381 if ((((ex).e_flags & EF_MIPS_ABI2) != 0) && \ 382 ((ex).e_flags & EF_MIPS_ABI) == 0) \ 383 __SET_PERSONALITY32_N32(); \ 384 else \ 385 __SET_PERSONALITY32_O32(ex, state); \ 386 } while (0) 387 #else 388 #define __SET_PERSONALITY32(ex, state) do { } while (0) 389 #endif 390 391 #define SET_PERSONALITY2(ex, state) \ 392 do { \ 393 unsigned int p; \ 394 \ 395 clear_thread_flag(TIF_32BIT_REGS); \ 396 clear_thread_flag(TIF_32BIT_FPREGS); \ 397 clear_thread_flag(TIF_HYBRID_FPREGS); \ 398 clear_thread_flag(TIF_32BIT_ADDR); \ 399 current->personality &= ~READ_IMPLIES_EXEC; \ 400 \ 401 if ((ex).e_ident[EI_CLASS] == ELFCLASS32) \ 402 __SET_PERSONALITY32(ex, state); \ 403 else \ 404 current->thread.abi = &mips_abi; \ 405 \ 406 mips_set_personality_nan(state); \ 407 \ 408 p = personality(current->personality); \ 409 if (p != PER_LINUX32 && p != PER_LINUX) \ 410 set_personality(PER_LINUX); \ 411 } while (0) 412 413 #endif /* CONFIG_64BIT */ 414 415 #define CORE_DUMP_USE_REGSET 416 #define ELF_EXEC_PAGESIZE PAGE_SIZE 417 418 /* This yields a mask that user programs can use to figure out what 419 instruction set this cpu supports. This could be done in userspace, 420 but it's not easy, and we've already done it here. */ 421 422 #define ELF_HWCAP (elf_hwcap) 423 extern unsigned int elf_hwcap; 424 #include <asm/hwcap.h> 425 426 /* 427 * This yields a string that ld.so will use to load implementation 428 * specific libraries for optimization. This is more specific in 429 * intent than poking at uname or /proc/cpuinfo. 430 */ 431 432 #define ELF_PLATFORM __elf_platform 433 extern const char *__elf_platform; 434 435 #define ELF_BASE_PLATFORM __elf_base_platform 436 extern const char *__elf_base_platform; 437 438 /* 439 * See comments in asm-alpha/elf.h, this is the same thing 440 * on the MIPS. 441 */ 442 #define ELF_PLAT_INIT(_r, load_addr) do { \ 443 _r->regs[1] = _r->regs[2] = _r->regs[3] = _r->regs[4] = 0; \ 444 _r->regs[5] = _r->regs[6] = _r->regs[7] = _r->regs[8] = 0; \ 445 _r->regs[9] = _r->regs[10] = _r->regs[11] = _r->regs[12] = 0; \ 446 _r->regs[13] = _r->regs[14] = _r->regs[15] = _r->regs[16] = 0; \ 447 _r->regs[17] = _r->regs[18] = _r->regs[19] = _r->regs[20] = 0; \ 448 _r->regs[21] = _r->regs[22] = _r->regs[23] = _r->regs[24] = 0; \ 449 _r->regs[25] = _r->regs[26] = _r->regs[27] = _r->regs[28] = 0; \ 450 _r->regs[30] = _r->regs[31] = 0; \ 451 } while (0) 452 453 /* This is the location that an ET_DYN program is loaded if exec'ed. Typical 454 use of this is to invoke "./ld.so someprog" to test out a new version of 455 the loader. We need to make sure that it is out of the way of the program 456 that it will "exec", and that there is sufficient room for the brk. */ 457 458 #define ELF_ET_DYN_BASE (TASK_SIZE / 3 * 2) 459 460 /* update AT_VECTOR_SIZE_ARCH if the number of NEW_AUX_ENT entries changes */ 461 #define ARCH_DLINFO \ 462 do { \ 463 NEW_AUX_ENT(AT_SYSINFO_EHDR, \ 464 (unsigned long)current->mm->context.vdso); \ 465 } while (0) 466 467 #define ARCH_HAS_SETUP_ADDITIONAL_PAGES 1 468 struct linux_binprm; 469 extern int arch_setup_additional_pages(struct linux_binprm *bprm, 470 int uses_interp); 471 472 #ifdef CONFIG_MIPS_FP_SUPPORT 473 474 struct arch_elf_state { 475 int nan_2008; 476 int fp_abi; 477 int interp_fp_abi; 478 int overall_fp_mode; 479 }; 480 481 #define MIPS_ABI_FP_UNKNOWN (-1) /* Unknown FP ABI (kernel internal) */ 482 483 #define INIT_ARCH_ELF_STATE { \ 484 .nan_2008 = -1, \ 485 .fp_abi = MIPS_ABI_FP_UNKNOWN, \ 486 .interp_fp_abi = MIPS_ABI_FP_UNKNOWN, \ 487 .overall_fp_mode = -1, \ 488 } 489 490 extern int arch_elf_pt_proc(void *ehdr, void *phdr, struct file *elf, 491 bool is_interp, struct arch_elf_state *state); 492 493 extern int arch_check_elf(void *ehdr, bool has_interpreter, void *interp_ehdr, 494 struct arch_elf_state *state); 495 496 /* Whether to accept legacy-NaN and 2008-NaN user binaries. */ 497 extern bool mips_use_nan_legacy; 498 extern bool mips_use_nan_2008; 499 500 extern void mips_set_personality_nan(struct arch_elf_state *state); 501 extern void mips_set_personality_fp(struct arch_elf_state *state); 502 503 #else /* !CONFIG_MIPS_FP_SUPPORT */ 504 505 struct arch_elf_state; 506 507 static inline void mips_set_personality_nan(struct arch_elf_state *state) 508 { 509 /* no-op */ 510 } 511 512 static inline void mips_set_personality_fp(struct arch_elf_state *state) 513 { 514 /* no-op */ 515 } 516 517 #endif /* !CONFIG_MIPS_FP_SUPPORT */ 518 519 #define elf_read_implies_exec(ex, stk) mips_elf_read_implies_exec(&(ex), stk) 520 extern int mips_elf_read_implies_exec(void *elf_ex, int exstack); 521 522 #endif /* _ASM_ELF_H */ 523