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