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 * This range is reserved for vendor specific relocations. 115 */ 116 #define R_MIPS_LOVENDOR 100 117 #define R_MIPS_HIVENDOR 127 118 119 #define SHN_MIPS_ACCOMON 0xff00 /* Allocated common symbols */ 120 #define SHN_MIPS_TEXT 0xff01 /* Allocated test symbols. */ 121 #define SHN_MIPS_DATA 0xff02 /* Allocated data symbols. */ 122 #define SHN_MIPS_SCOMMON 0xff03 /* Small common symbols */ 123 #define SHN_MIPS_SUNDEFINED 0xff04 /* Small undefined symbols */ 124 125 #define SHT_MIPS_LIST 0x70000000 126 #define SHT_MIPS_CONFLICT 0x70000002 127 #define SHT_MIPS_GPTAB 0x70000003 128 #define SHT_MIPS_UCODE 0x70000004 129 #define SHT_MIPS_DEBUG 0x70000005 130 #define SHT_MIPS_REGINFO 0x70000006 131 #define SHT_MIPS_PACKAGE 0x70000007 132 #define SHT_MIPS_PACKSYM 0x70000008 133 #define SHT_MIPS_RELD 0x70000009 134 #define SHT_MIPS_IFACE 0x7000000b 135 #define SHT_MIPS_CONTENT 0x7000000c 136 #define SHT_MIPS_OPTIONS 0x7000000d 137 #define SHT_MIPS_SHDR 0x70000010 138 #define SHT_MIPS_FDESC 0x70000011 139 #define SHT_MIPS_EXTSYM 0x70000012 140 #define SHT_MIPS_DENSE 0x70000013 141 #define SHT_MIPS_PDESC 0x70000014 142 #define SHT_MIPS_LOCSYM 0x70000015 143 #define SHT_MIPS_AUXSYM 0x70000016 144 #define SHT_MIPS_OPTSYM 0x70000017 145 #define SHT_MIPS_LOCSTR 0x70000018 146 #define SHT_MIPS_LINE 0x70000019 147 #define SHT_MIPS_RFDESC 0x7000001a 148 #define SHT_MIPS_DELTASYM 0x7000001b 149 #define SHT_MIPS_DELTAINST 0x7000001c 150 #define SHT_MIPS_DELTACLASS 0x7000001d 151 #define SHT_MIPS_DWARF 0x7000001e 152 #define SHT_MIPS_DELTADECL 0x7000001f 153 #define SHT_MIPS_SYMBOL_LIB 0x70000020 154 #define SHT_MIPS_EVENTS 0x70000021 155 #define SHT_MIPS_TRANSLATE 0x70000022 156 #define SHT_MIPS_PIXIE 0x70000023 157 #define SHT_MIPS_XLATE 0x70000024 158 #define SHT_MIPS_XLATE_DEBUG 0x70000025 159 #define SHT_MIPS_WHIRL 0x70000026 160 #define SHT_MIPS_EH_REGION 0x70000027 161 #define SHT_MIPS_XLATE_OLD 0x70000028 162 #define SHT_MIPS_PDR_EXCEPTION 0x70000029 163 164 #define SHF_MIPS_GPREL 0x10000000 165 #define SHF_MIPS_MERGE 0x20000000 166 #define SHF_MIPS_ADDR 0x40000000 167 #define SHF_MIPS_STRING 0x80000000 168 #define SHF_MIPS_NOSTRIP 0x08000000 169 #define SHF_MIPS_LOCAL 0x04000000 170 #define SHF_MIPS_NAMES 0x02000000 171 #define SHF_MIPS_NODUPES 0x01000000 172 173 #ifndef ELF_ARCH 174 /* ELF register definitions */ 175 #define ELF_NGREG 45 176 #define ELF_NFPREG 33 177 178 typedef unsigned long elf_greg_t; 179 typedef elf_greg_t elf_gregset_t[ELF_NGREG]; 180 181 typedef double elf_fpreg_t; 182 typedef elf_fpreg_t elf_fpregset_t[ELF_NFPREG]; 183 184 struct mips_elf_abiflags_v0 { 185 uint16_t version; /* Version of flags structure */ 186 uint8_t isa_level; /* The level of the ISA: 1-5, 32, 64 */ 187 uint8_t isa_rev; /* The revision of ISA: 0 for MIPS V and below, 188 1-n otherwise */ 189 uint8_t gpr_size; /* The size of general purpose registers */ 190 uint8_t cpr1_size; /* The size of co-processor 1 registers */ 191 uint8_t cpr2_size; /* The size of co-processor 2 registers */ 192 uint8_t fp_abi; /* The floating-point ABI */ 193 uint32_t isa_ext; /* Mask of processor-specific extensions */ 194 uint32_t ases; /* Mask of ASEs used */ 195 uint32_t flags1; /* Mask of general flags */ 196 uint32_t flags2; 197 }; 198 199 #define MIPS_ABI_FP_ANY 0 /* FP ABI doesn't matter */ 200 #define MIPS_ABI_FP_DOUBLE 1 /* -mdouble-float */ 201 #define MIPS_ABI_FP_SINGLE 2 /* -msingle-float */ 202 #define MIPS_ABI_FP_SOFT 3 /* -msoft-float */ 203 #define MIPS_ABI_FP_OLD_64 4 /* -mips32r2 -mfp64 */ 204 #define MIPS_ABI_FP_XX 5 /* -mfpxx */ 205 #define MIPS_ABI_FP_64 6 /* -mips32r2 -mfp64 */ 206 #define MIPS_ABI_FP_64A 7 /* -mips32r2 -mfp64 -mno-odd-spreg */ 207 208 #ifdef CONFIG_32BIT 209 210 /* 211 * In order to be sure that we don't attempt to execute an O32 binary which 212 * requires 64 bit FP (FR=1) on a system which does not support it we refuse 213 * to execute any binary which has bits specified by the following macro set 214 * in its ELF header flags. 215 */ 216 #ifdef CONFIG_MIPS_O32_FP64_SUPPORT 217 # define __MIPS_O32_FP64_MUST_BE_ZERO 0 218 #else 219 # define __MIPS_O32_FP64_MUST_BE_ZERO EF_MIPS_FP64 220 #endif 221 222 /* 223 * This is used to ensure we don't load something for the wrong architecture. 224 */ 225 #define elf_check_arch(hdr) \ 226 ({ \ 227 int __res = 1; \ 228 struct elfhdr *__h = (hdr); \ 229 \ 230 if (!mips_elf_check_machine(__h)) \ 231 __res = 0; \ 232 if (__h->e_ident[EI_CLASS] != ELFCLASS32) \ 233 __res = 0; \ 234 if ((__h->e_flags & EF_MIPS_ABI2) != 0) \ 235 __res = 0; \ 236 if (((__h->e_flags & EF_MIPS_ABI) != 0) && \ 237 ((__h->e_flags & EF_MIPS_ABI) != EF_MIPS_ABI_O32)) \ 238 __res = 0; \ 239 if (__h->e_flags & __MIPS_O32_FP64_MUST_BE_ZERO) \ 240 __res = 0; \ 241 \ 242 __res; \ 243 }) 244 245 /* 246 * These are used to set parameters in the core dumps. 247 */ 248 #define ELF_CLASS ELFCLASS32 249 250 #endif /* CONFIG_32BIT */ 251 252 #ifdef CONFIG_64BIT 253 /* 254 * This is used to ensure we don't load something for the wrong architecture. 255 */ 256 #define elf_check_arch(hdr) \ 257 ({ \ 258 int __res = 1; \ 259 struct elfhdr *__h = (hdr); \ 260 \ 261 if (!mips_elf_check_machine(__h)) \ 262 __res = 0; \ 263 if (__h->e_ident[EI_CLASS] != ELFCLASS64) \ 264 __res = 0; \ 265 \ 266 __res; \ 267 }) 268 269 /* 270 * These are used to set parameters in the core dumps. 271 */ 272 #define ELF_CLASS ELFCLASS64 273 274 #endif /* CONFIG_64BIT */ 275 276 /* 277 * These are used to set parameters in the core dumps. 278 */ 279 #ifdef __MIPSEB__ 280 #define ELF_DATA ELFDATA2MSB 281 #elif defined(__MIPSEL__) 282 #define ELF_DATA ELFDATA2LSB 283 #endif 284 #define ELF_ARCH EM_MIPS 285 286 #endif /* !defined(ELF_ARCH) */ 287 288 #define mips_elf_check_machine(x) ((x)->e_machine == EM_MIPS) 289 290 #define vmcore_elf32_check_arch mips_elf_check_machine 291 #define vmcore_elf64_check_arch mips_elf_check_machine 292 293 struct mips_abi; 294 295 extern struct mips_abi mips_abi; 296 extern struct mips_abi mips_abi_32; 297 extern struct mips_abi mips_abi_n32; 298 299 #ifdef CONFIG_32BIT 300 301 #define SET_PERSONALITY2(ex, state) \ 302 do { \ 303 if (personality(current->personality) != PER_LINUX) \ 304 set_personality(PER_LINUX); \ 305 \ 306 clear_thread_flag(TIF_HYBRID_FPREGS); \ 307 set_thread_flag(TIF_32BIT_FPREGS); \ 308 \ 309 mips_set_personality_fp(state); \ 310 \ 311 current->thread.abi = &mips_abi; \ 312 \ 313 mips_set_personality_nan(state); \ 314 } while (0) 315 316 #endif /* CONFIG_32BIT */ 317 318 #ifdef CONFIG_64BIT 319 320 #ifdef CONFIG_MIPS32_N32 321 #define __SET_PERSONALITY32_N32() \ 322 do { \ 323 set_thread_flag(TIF_32BIT_ADDR); \ 324 current->thread.abi = &mips_abi_n32; \ 325 } while (0) 326 #else 327 #define __SET_PERSONALITY32_N32() \ 328 do { } while (0) 329 #endif 330 331 #ifdef CONFIG_MIPS32_O32 332 #define __SET_PERSONALITY32_O32(ex, state) \ 333 do { \ 334 set_thread_flag(TIF_32BIT_REGS); \ 335 set_thread_flag(TIF_32BIT_ADDR); \ 336 clear_thread_flag(TIF_HYBRID_FPREGS); \ 337 set_thread_flag(TIF_32BIT_FPREGS); \ 338 \ 339 mips_set_personality_fp(state); \ 340 \ 341 current->thread.abi = &mips_abi_32; \ 342 } while (0) 343 #else 344 #define __SET_PERSONALITY32_O32(ex, state) \ 345 do { } while (0) 346 #endif 347 348 #ifdef CONFIG_MIPS32_COMPAT 349 #define __SET_PERSONALITY32(ex, state) \ 350 do { \ 351 if ((((ex).e_flags & EF_MIPS_ABI2) != 0) && \ 352 ((ex).e_flags & EF_MIPS_ABI) == 0) \ 353 __SET_PERSONALITY32_N32(); \ 354 else \ 355 __SET_PERSONALITY32_O32(ex, state); \ 356 } while (0) 357 #else 358 #define __SET_PERSONALITY32(ex, state) do { } while (0) 359 #endif 360 361 #define SET_PERSONALITY2(ex, state) \ 362 do { \ 363 unsigned int p; \ 364 \ 365 clear_thread_flag(TIF_32BIT_REGS); \ 366 clear_thread_flag(TIF_32BIT_FPREGS); \ 367 clear_thread_flag(TIF_HYBRID_FPREGS); \ 368 clear_thread_flag(TIF_32BIT_ADDR); \ 369 \ 370 if ((ex).e_ident[EI_CLASS] == ELFCLASS32) \ 371 __SET_PERSONALITY32(ex, state); \ 372 else \ 373 current->thread.abi = &mips_abi; \ 374 \ 375 mips_set_personality_nan(state); \ 376 \ 377 p = personality(current->personality); \ 378 if (p != PER_LINUX32 && p != PER_LINUX) \ 379 set_personality(PER_LINUX); \ 380 } while (0) 381 382 #endif /* CONFIG_64BIT */ 383 384 #define CORE_DUMP_USE_REGSET 385 #define ELF_EXEC_PAGESIZE PAGE_SIZE 386 387 /* This yields a mask that user programs can use to figure out what 388 instruction set this cpu supports. This could be done in userspace, 389 but it's not easy, and we've already done it here. */ 390 391 #define ELF_HWCAP (elf_hwcap) 392 extern unsigned int elf_hwcap; 393 #include <asm/hwcap.h> 394 395 /* 396 * This yields a string that ld.so will use to load implementation 397 * specific libraries for optimization. This is more specific in 398 * intent than poking at uname or /proc/cpuinfo. 399 */ 400 401 #define ELF_PLATFORM __elf_platform 402 extern const char *__elf_platform; 403 404 /* 405 * See comments in asm-alpha/elf.h, this is the same thing 406 * on the MIPS. 407 */ 408 #define ELF_PLAT_INIT(_r, load_addr) do { \ 409 _r->regs[1] = _r->regs[2] = _r->regs[3] = _r->regs[4] = 0; \ 410 _r->regs[5] = _r->regs[6] = _r->regs[7] = _r->regs[8] = 0; \ 411 _r->regs[9] = _r->regs[10] = _r->regs[11] = _r->regs[12] = 0; \ 412 _r->regs[13] = _r->regs[14] = _r->regs[15] = _r->regs[16] = 0; \ 413 _r->regs[17] = _r->regs[18] = _r->regs[19] = _r->regs[20] = 0; \ 414 _r->regs[21] = _r->regs[22] = _r->regs[23] = _r->regs[24] = 0; \ 415 _r->regs[25] = _r->regs[26] = _r->regs[27] = _r->regs[28] = 0; \ 416 _r->regs[30] = _r->regs[31] = 0; \ 417 } while (0) 418 419 /* This is the location that an ET_DYN program is loaded if exec'ed. Typical 420 use of this is to invoke "./ld.so someprog" to test out a new version of 421 the loader. We need to make sure that it is out of the way of the program 422 that it will "exec", and that there is sufficient room for the brk. */ 423 424 #ifndef ELF_ET_DYN_BASE 425 #define ELF_ET_DYN_BASE (TASK_SIZE / 3 * 2) 426 #endif 427 428 #define ARCH_DLINFO \ 429 do { \ 430 NEW_AUX_ENT(AT_SYSINFO_EHDR, \ 431 (unsigned long)current->mm->context.vdso); \ 432 } while (0) 433 434 #define ARCH_HAS_SETUP_ADDITIONAL_PAGES 1 435 struct linux_binprm; 436 extern int arch_setup_additional_pages(struct linux_binprm *bprm, 437 int uses_interp); 438 439 struct arch_elf_state { 440 int nan_2008; 441 int fp_abi; 442 int interp_fp_abi; 443 int overall_fp_mode; 444 }; 445 446 #define MIPS_ABI_FP_UNKNOWN (-1) /* Unknown FP ABI (kernel internal) */ 447 448 #define INIT_ARCH_ELF_STATE { \ 449 .nan_2008 = -1, \ 450 .fp_abi = MIPS_ABI_FP_UNKNOWN, \ 451 .interp_fp_abi = MIPS_ABI_FP_UNKNOWN, \ 452 .overall_fp_mode = -1, \ 453 } 454 455 /* Whether to accept legacy-NaN and 2008-NaN user binaries. */ 456 extern bool mips_use_nan_legacy; 457 extern bool mips_use_nan_2008; 458 459 extern int arch_elf_pt_proc(void *ehdr, void *phdr, struct file *elf, 460 bool is_interp, struct arch_elf_state *state); 461 462 extern int arch_check_elf(void *ehdr, bool has_interpreter, void *interp_ehdr, 463 struct arch_elf_state *state); 464 465 extern void mips_set_personality_nan(struct arch_elf_state *state); 466 extern void mips_set_personality_fp(struct arch_elf_state *state); 467 468 #endif /* _ASM_ELF_H */ 469