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/cpu-info.h> 16 #include <asm/current.h> 17 18 /* ELF header e_flags defines. */ 19 /* MIPS architecture level. */ 20 #define EF_MIPS_ARCH_1 0x00000000 /* -mips1 code. */ 21 #define EF_MIPS_ARCH_2 0x10000000 /* -mips2 code. */ 22 #define EF_MIPS_ARCH_3 0x20000000 /* -mips3 code. */ 23 #define EF_MIPS_ARCH_4 0x30000000 /* -mips4 code. */ 24 #define EF_MIPS_ARCH_5 0x40000000 /* -mips5 code. */ 25 #define EF_MIPS_ARCH_32 0x50000000 /* MIPS32 code. */ 26 #define EF_MIPS_ARCH_64 0x60000000 /* MIPS64 code. */ 27 #define EF_MIPS_ARCH_32R2 0x70000000 /* MIPS32 R2 code. */ 28 #define EF_MIPS_ARCH_64R2 0x80000000 /* MIPS64 R2 code. */ 29 30 /* The ABI of a file. */ 31 #define EF_MIPS_ABI_O32 0x00001000 /* O32 ABI. */ 32 #define EF_MIPS_ABI_O64 0x00002000 /* O32 extended for 64 bit. */ 33 34 #define PT_MIPS_REGINFO 0x70000000 35 #define PT_MIPS_RTPROC 0x70000001 36 #define PT_MIPS_OPTIONS 0x70000002 37 #define PT_MIPS_ABIFLAGS 0x70000003 38 39 /* Flags in the e_flags field of the header */ 40 #define EF_MIPS_NOREORDER 0x00000001 41 #define EF_MIPS_PIC 0x00000002 42 #define EF_MIPS_CPIC 0x00000004 43 #define EF_MIPS_ABI2 0x00000020 44 #define EF_MIPS_OPTIONS_FIRST 0x00000080 45 #define EF_MIPS_32BITMODE 0x00000100 46 #define EF_MIPS_FP64 0x00000200 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 (__h->e_machine != EM_MIPS) \ 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 (__h->e_machine != EM_MIPS) \ 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 struct mips_abi; 289 290 extern struct mips_abi mips_abi; 291 extern struct mips_abi mips_abi_32; 292 extern struct mips_abi mips_abi_n32; 293 294 #ifdef CONFIG_32BIT 295 296 #define SET_PERSONALITY2(ex, state) \ 297 do { \ 298 if (personality(current->personality) != PER_LINUX) \ 299 set_personality(PER_LINUX); \ 300 \ 301 clear_thread_flag(TIF_HYBRID_FPREGS); \ 302 set_thread_flag(TIF_32BIT_FPREGS); \ 303 \ 304 mips_set_personality_fp(state); \ 305 \ 306 current->thread.abi = &mips_abi; \ 307 \ 308 current->thread.fpu.fcr31 = boot_cpu_data.fpu_csr31; \ 309 } while (0) 310 311 #endif /* CONFIG_32BIT */ 312 313 #ifdef CONFIG_64BIT 314 315 #ifdef CONFIG_MIPS32_N32 316 #define __SET_PERSONALITY32_N32() \ 317 do { \ 318 set_thread_flag(TIF_32BIT_ADDR); \ 319 current->thread.abi = &mips_abi_n32; \ 320 } while (0) 321 #else 322 #define __SET_PERSONALITY32_N32() \ 323 do { } while (0) 324 #endif 325 326 #ifdef CONFIG_MIPS32_O32 327 #define __SET_PERSONALITY32_O32(ex, state) \ 328 do { \ 329 set_thread_flag(TIF_32BIT_REGS); \ 330 set_thread_flag(TIF_32BIT_ADDR); \ 331 clear_thread_flag(TIF_HYBRID_FPREGS); \ 332 set_thread_flag(TIF_32BIT_FPREGS); \ 333 \ 334 mips_set_personality_fp(state); \ 335 \ 336 current->thread.abi = &mips_abi_32; \ 337 } while (0) 338 #else 339 #define __SET_PERSONALITY32_O32(ex, state) \ 340 do { } while (0) 341 #endif 342 343 #ifdef CONFIG_MIPS32_COMPAT 344 #define __SET_PERSONALITY32(ex, state) \ 345 do { \ 346 if ((((ex).e_flags & EF_MIPS_ABI2) != 0) && \ 347 ((ex).e_flags & EF_MIPS_ABI) == 0) \ 348 __SET_PERSONALITY32_N32(); \ 349 else \ 350 __SET_PERSONALITY32_O32(ex, state); \ 351 } while (0) 352 #else 353 #define __SET_PERSONALITY32(ex, state) do { } while (0) 354 #endif 355 356 #define SET_PERSONALITY2(ex, state) \ 357 do { \ 358 unsigned int p; \ 359 \ 360 clear_thread_flag(TIF_32BIT_REGS); \ 361 clear_thread_flag(TIF_32BIT_FPREGS); \ 362 clear_thread_flag(TIF_HYBRID_FPREGS); \ 363 clear_thread_flag(TIF_32BIT_ADDR); \ 364 \ 365 if ((ex).e_ident[EI_CLASS] == ELFCLASS32) \ 366 __SET_PERSONALITY32(ex, state); \ 367 else \ 368 current->thread.abi = &mips_abi; \ 369 \ 370 current->thread.fpu.fcr31 = boot_cpu_data.fpu_csr31; \ 371 \ 372 p = personality(current->personality); \ 373 if (p != PER_LINUX32 && p != PER_LINUX) \ 374 set_personality(PER_LINUX); \ 375 } while (0) 376 377 #endif /* CONFIG_64BIT */ 378 379 #define CORE_DUMP_USE_REGSET 380 #define ELF_EXEC_PAGESIZE PAGE_SIZE 381 382 /* This yields a mask that user programs can use to figure out what 383 instruction set this cpu supports. This could be done in userspace, 384 but it's not easy, and we've already done it here. */ 385 386 #define ELF_HWCAP (elf_hwcap) 387 extern unsigned int elf_hwcap; 388 #include <asm/hwcap.h> 389 390 /* 391 * This yields a string that ld.so will use to load implementation 392 * specific libraries for optimization. This is more specific in 393 * intent than poking at uname or /proc/cpuinfo. 394 */ 395 396 #define ELF_PLATFORM __elf_platform 397 extern const char *__elf_platform; 398 399 /* 400 * See comments in asm-alpha/elf.h, this is the same thing 401 * on the MIPS. 402 */ 403 #define ELF_PLAT_INIT(_r, load_addr) do { \ 404 _r->regs[1] = _r->regs[2] = _r->regs[3] = _r->regs[4] = 0; \ 405 _r->regs[5] = _r->regs[6] = _r->regs[7] = _r->regs[8] = 0; \ 406 _r->regs[9] = _r->regs[10] = _r->regs[11] = _r->regs[12] = 0; \ 407 _r->regs[13] = _r->regs[14] = _r->regs[15] = _r->regs[16] = 0; \ 408 _r->regs[17] = _r->regs[18] = _r->regs[19] = _r->regs[20] = 0; \ 409 _r->regs[21] = _r->regs[22] = _r->regs[23] = _r->regs[24] = 0; \ 410 _r->regs[25] = _r->regs[26] = _r->regs[27] = _r->regs[28] = 0; \ 411 _r->regs[30] = _r->regs[31] = 0; \ 412 } while (0) 413 414 /* This is the location that an ET_DYN program is loaded if exec'ed. Typical 415 use of this is to invoke "./ld.so someprog" to test out a new version of 416 the loader. We need to make sure that it is out of the way of the program 417 that it will "exec", and that there is sufficient room for the brk. */ 418 419 #ifndef ELF_ET_DYN_BASE 420 #define ELF_ET_DYN_BASE (TASK_SIZE / 3 * 2) 421 #endif 422 423 #define ARCH_DLINFO \ 424 do { \ 425 NEW_AUX_ENT(AT_SYSINFO_EHDR, \ 426 (unsigned long)current->mm->context.vdso); \ 427 } while (0) 428 429 #define ARCH_HAS_SETUP_ADDITIONAL_PAGES 1 430 struct linux_binprm; 431 extern int arch_setup_additional_pages(struct linux_binprm *bprm, 432 int uses_interp); 433 434 struct arch_elf_state { 435 int fp_abi; 436 int interp_fp_abi; 437 int overall_fp_mode; 438 }; 439 440 #define MIPS_ABI_FP_UNKNOWN (-1) /* Unknown FP ABI (kernel internal) */ 441 442 #define INIT_ARCH_ELF_STATE { \ 443 .fp_abi = MIPS_ABI_FP_UNKNOWN, \ 444 .interp_fp_abi = MIPS_ABI_FP_UNKNOWN, \ 445 .overall_fp_mode = -1, \ 446 } 447 448 extern int arch_elf_pt_proc(void *ehdr, void *phdr, struct file *elf, 449 bool is_interp, struct arch_elf_state *state); 450 451 extern int arch_check_elf(void *ehdr, bool has_interpreter, 452 struct arch_elf_state *state); 453 454 extern void mips_set_personality_fp(struct arch_elf_state *state); 455 456 #endif /* _ASM_ELF_H */ 457