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#include <asm/cpu-info.h> 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_ABI 0x0000f000 47#define EF_MIPS_ARCH 0xf0000000 48 49#define DT_MIPS_RLD_VERSION 0x70000001 50#define DT_MIPS_TIME_STAMP 0x70000002 51#define DT_MIPS_ICHECKSUM 0x70000003 52#define DT_MIPS_IVERSION 0x70000004 53#define DT_MIPS_FLAGS 0x70000005 54 #define RHF_NONE 0x00000000 55 #define RHF_HARDWAY 0x00000001 56 #define RHF_NOTPOT 0x00000002 57 #define RHF_SGI_ONLY 0x00000010 58#define DT_MIPS_BASE_ADDRESS 0x70000006 59#define DT_MIPS_CONFLICT 0x70000008 60#define DT_MIPS_LIBLIST 0x70000009 61#define DT_MIPS_LOCAL_GOTNO 0x7000000a 62#define DT_MIPS_CONFLICTNO 0x7000000b 63#define DT_MIPS_LIBLISTNO 0x70000010 64#define DT_MIPS_SYMTABNO 0x70000011 65#define DT_MIPS_UNREFEXTNO 0x70000012 66#define DT_MIPS_GOTSYM 0x70000013 67#define DT_MIPS_HIPAGENO 0x70000014 68#define DT_MIPS_RLD_MAP 0x70000016 69 70#define R_MIPS_NONE 0 71#define R_MIPS_16 1 72#define R_MIPS_32 2 73#define R_MIPS_REL32 3 74#define R_MIPS_26 4 75#define R_MIPS_HI16 5 76#define R_MIPS_LO16 6 77#define R_MIPS_GPREL16 7 78#define R_MIPS_LITERAL 8 79#define R_MIPS_GOT16 9 80#define R_MIPS_PC16 10 81#define R_MIPS_CALL16 11 82#define R_MIPS_GPREL32 12 83/* The remaining relocs are defined on Irix, although they are not 84 in the MIPS ELF ABI. */ 85#define R_MIPS_UNUSED1 13 86#define R_MIPS_UNUSED2 14 87#define R_MIPS_UNUSED3 15 88#define R_MIPS_SHIFT5 16 89#define R_MIPS_SHIFT6 17 90#define R_MIPS_64 18 91#define R_MIPS_GOT_DISP 19 92#define R_MIPS_GOT_PAGE 20 93#define R_MIPS_GOT_OFST 21 94/* 95 * The following two relocation types are specified in the MIPS ABI 96 * conformance guide version 1.2 but not yet in the psABI. 97 */ 98#define R_MIPS_GOTHI16 22 99#define R_MIPS_GOTLO16 23 100#define R_MIPS_SUB 24 101#define R_MIPS_INSERT_A 25 102#define R_MIPS_INSERT_B 26 103#define R_MIPS_DELETE 27 104#define R_MIPS_HIGHER 28 105#define R_MIPS_HIGHEST 29 106/* 107 * The following two relocation types are specified in the MIPS ABI 108 * conformance guide version 1.2 but not yet in the psABI. 109 */ 110#define R_MIPS_CALLHI16 30 111#define R_MIPS_CALLLO16 31 112/* 113 * This range is reserved for vendor specific relocations. 114 */ 115#define R_MIPS_LOVENDOR 100 116#define R_MIPS_HIVENDOR 127 117 118#define SHN_MIPS_ACCOMON 0xff00 /* Allocated common symbols */ 119#define SHN_MIPS_TEXT 0xff01 /* Allocated test symbols. */ 120#define SHN_MIPS_DATA 0xff02 /* Allocated data symbols. */ 121#define SHN_MIPS_SCOMMON 0xff03 /* Small common symbols */ 122#define SHN_MIPS_SUNDEFINED 0xff04 /* Small undefined symbols */ 123 124#define SHT_MIPS_LIST 0x70000000 125#define SHT_MIPS_CONFLICT 0x70000002 126#define SHT_MIPS_GPTAB 0x70000003 127#define SHT_MIPS_UCODE 0x70000004 128#define SHT_MIPS_DEBUG 0x70000005 129#define SHT_MIPS_REGINFO 0x70000006 130#define SHT_MIPS_PACKAGE 0x70000007 131#define SHT_MIPS_PACKSYM 0x70000008 132#define SHT_MIPS_RELD 0x70000009 133#define SHT_MIPS_IFACE 0x7000000b 134#define SHT_MIPS_CONTENT 0x7000000c 135#define SHT_MIPS_OPTIONS 0x7000000d 136#define SHT_MIPS_SHDR 0x70000010 137#define SHT_MIPS_FDESC 0x70000011 138#define SHT_MIPS_EXTSYM 0x70000012 139#define SHT_MIPS_DENSE 0x70000013 140#define SHT_MIPS_PDESC 0x70000014 141#define SHT_MIPS_LOCSYM 0x70000015 142#define SHT_MIPS_AUXSYM 0x70000016 143#define SHT_MIPS_OPTSYM 0x70000017 144#define SHT_MIPS_LOCSTR 0x70000018 145#define SHT_MIPS_LINE 0x70000019 146#define SHT_MIPS_RFDESC 0x7000001a 147#define SHT_MIPS_DELTASYM 0x7000001b 148#define SHT_MIPS_DELTAINST 0x7000001c 149#define SHT_MIPS_DELTACLASS 0x7000001d 150#define SHT_MIPS_DWARF 0x7000001e 151#define SHT_MIPS_DELTADECL 0x7000001f 152#define SHT_MIPS_SYMBOL_LIB 0x70000020 153#define SHT_MIPS_EVENTS 0x70000021 154#define SHT_MIPS_TRANSLATE 0x70000022 155#define SHT_MIPS_PIXIE 0x70000023 156#define SHT_MIPS_XLATE 0x70000024 157#define SHT_MIPS_XLATE_DEBUG 0x70000025 158#define SHT_MIPS_WHIRL 0x70000026 159#define SHT_MIPS_EH_REGION 0x70000027 160#define SHT_MIPS_XLATE_OLD 0x70000028 161#define SHT_MIPS_PDR_EXCEPTION 0x70000029 162 163#define SHF_MIPS_GPREL 0x10000000 164#define SHF_MIPS_MERGE 0x20000000 165#define SHF_MIPS_ADDR 0x40000000 166#define SHF_MIPS_STRING 0x80000000 167#define SHF_MIPS_NOSTRIP 0x08000000 168#define SHF_MIPS_LOCAL 0x04000000 169#define SHF_MIPS_NAMES 0x02000000 170#define SHF_MIPS_NODUPES 0x01000000 171 172#ifndef ELF_ARCH 173/* ELF register definitions */ 174#define ELF_NGREG 45 175#define ELF_NFPREG 33 176 177typedef unsigned long elf_greg_t; 178typedef elf_greg_t elf_gregset_t[ELF_NGREG]; 179 180typedef double elf_fpreg_t; 181typedef elf_fpreg_t elf_fpregset_t[ELF_NFPREG]; 182 183struct mips_elf_abiflags_v0 { 184 uint16_t version; /* Version of flags structure */ 185 uint8_t isa_level; /* The level of the ISA: 1-5, 32, 64 */ 186 uint8_t isa_rev; /* The revision of ISA: 0 for MIPS V and below, 187 1-n otherwise */ 188 uint8_t gpr_size; /* The size of general purpose registers */ 189 uint8_t cpr1_size; /* The size of co-processor 1 registers */ 190 uint8_t cpr2_size; /* The size of co-processor 2 registers */ 191 uint8_t fp_abi; /* The floating-point ABI */ 192 uint32_t isa_ext; /* Mask of processor-specific extensions */ 193 uint32_t ases; /* Mask of ASEs used */ 194 uint32_t flags1; /* Mask of general flags */ 195 uint32_t flags2; 196}; 197 198#define MIPS_ABI_FP_ANY 0 /* FP ABI doesn't matter */ 199#define MIPS_ABI_FP_DOUBLE 1 /* -mdouble-float */ 200#define MIPS_ABI_FP_SINGLE 2 /* -msingle-float */ 201#define MIPS_ABI_FP_SOFT 3 /* -msoft-float */ 202#define MIPS_ABI_FP_OLD_64 4 /* -mips32r2 -mfp64 */ 203#define MIPS_ABI_FP_XX 5 /* -mfpxx */ 204#define MIPS_ABI_FP_64 6 /* -mips32r2 -mfp64 */ 205#define MIPS_ABI_FP_64A 7 /* -mips32r2 -mfp64 -mno-odd-spreg */ 206 207#ifdef CONFIG_32BIT 208 209/* 210 * In order to be sure that we don't attempt to execute an O32 binary which 211 * requires 64 bit FP (FR=1) on a system which does not support it we refuse 212 * to execute any binary which has bits specified by the following macro set 213 * in its ELF header flags. 214 */ 215#ifdef CONFIG_MIPS_O32_FP64_SUPPORT 216# define __MIPS_O32_FP64_MUST_BE_ZERO 0 217#else 218# define __MIPS_O32_FP64_MUST_BE_ZERO EF_MIPS_FP64 219#endif 220 221/* 222 * This is used to ensure we don't load something for the wrong architecture. 223 */ 224#define elf_check_arch(hdr) \ 225({ \ 226 int __res = 1; \ 227 struct elfhdr *__h = (hdr); \ 228 \ 229 if (__h->e_machine != EM_MIPS) \ 230 __res = 0; \ 231 if (__h->e_ident[EI_CLASS] != ELFCLASS32) \ 232 __res = 0; \ 233 if ((__h->e_flags & EF_MIPS_ABI2) != 0) \ 234 __res = 0; \ 235 if (((__h->e_flags & EF_MIPS_ABI) != 0) && \ 236 ((__h->e_flags & EF_MIPS_ABI) != EF_MIPS_ABI_O32)) \ 237 __res = 0; \ 238 if (__h->e_flags & __MIPS_O32_FP64_MUST_BE_ZERO) \ 239 __res = 0; \ 240 \ 241 __res; \ 242}) 243 244/* 245 * These are used to set parameters in the core dumps. 246 */ 247#define ELF_CLASS ELFCLASS32 248 249#endif /* CONFIG_32BIT */ 250 251#ifdef CONFIG_64BIT 252/* 253 * This is used to ensure we don't load something for the wrong architecture. 254 */ 255#define elf_check_arch(hdr) \ 256({ \ 257 int __res = 1; \ 258 struct elfhdr *__h = (hdr); \ 259 \ 260 if (__h->e_machine != EM_MIPS) \ 261 __res = 0; \ 262 if (__h->e_ident[EI_CLASS] != ELFCLASS64) \ 263 __res = 0; \ 264 \ 265 __res; \ 266}) 267 268/* 269 * These are used to set parameters in the core dumps. 270 */ 271#define ELF_CLASS ELFCLASS64 272 273#endif /* CONFIG_64BIT */ 274 275/* 276 * These are used to set parameters in the core dumps. 277 */ 278#ifdef __MIPSEB__ 279#define ELF_DATA ELFDATA2MSB 280#elif defined(__MIPSEL__) 281#define ELF_DATA ELFDATA2LSB 282#endif 283#define ELF_ARCH EM_MIPS 284 285#endif /* !defined(ELF_ARCH) */ 286 287struct mips_abi; 288 289extern struct mips_abi mips_abi; 290extern struct mips_abi mips_abi_32; 291extern struct mips_abi mips_abi_n32; 292 293#ifdef CONFIG_32BIT 294 295#define SET_PERSONALITY2(ex, state) \ 296do { \ 297 if (personality(current->personality) != PER_LINUX) \ 298 set_personality(PER_LINUX); \ 299 \ 300 clear_thread_flag(TIF_HYBRID_FPREGS); \ 301 set_thread_flag(TIF_32BIT_FPREGS); \ 302 \ 303 mips_set_personality_fp(state); \ 304 \ 305 current->thread.abi = &mips_abi; \ 306 \ 307 current->thread.fpu.fcr31 = boot_cpu_data.fpu_csr31; \ 308} while (0) 309 310#endif /* CONFIG_32BIT */ 311 312#ifdef CONFIG_64BIT 313 314#ifdef CONFIG_MIPS32_N32 315#define __SET_PERSONALITY32_N32() \ 316 do { \ 317 set_thread_flag(TIF_32BIT_ADDR); \ 318 current->thread.abi = &mips_abi_n32; \ 319 } while (0) 320#else 321#define __SET_PERSONALITY32_N32() \ 322 do { } while (0) 323#endif 324 325#ifdef CONFIG_MIPS32_O32 326#define __SET_PERSONALITY32_O32(ex, state) \ 327 do { \ 328 set_thread_flag(TIF_32BIT_REGS); \ 329 set_thread_flag(TIF_32BIT_ADDR); \ 330 clear_thread_flag(TIF_HYBRID_FPREGS); \ 331 set_thread_flag(TIF_32BIT_FPREGS); \ 332 \ 333 mips_set_personality_fp(state); \ 334 \ 335 current->thread.abi = &mips_abi_32; \ 336 } while (0) 337#else 338#define __SET_PERSONALITY32_O32(ex, state) \ 339 do { } while (0) 340#endif 341 342#ifdef CONFIG_MIPS32_COMPAT 343#define __SET_PERSONALITY32(ex, state) \ 344do { \ 345 if ((((ex).e_flags & EF_MIPS_ABI2) != 0) && \ 346 ((ex).e_flags & EF_MIPS_ABI) == 0) \ 347 __SET_PERSONALITY32_N32(); \ 348 else \ 349 __SET_PERSONALITY32_O32(ex, state); \ 350} while (0) 351#else 352#define __SET_PERSONALITY32(ex, state) do { } while (0) 353#endif 354 355#define SET_PERSONALITY2(ex, state) \ 356do { \ 357 unsigned int p; \ 358 \ 359 clear_thread_flag(TIF_32BIT_REGS); \ 360 clear_thread_flag(TIF_32BIT_FPREGS); \ 361 clear_thread_flag(TIF_HYBRID_FPREGS); \ 362 clear_thread_flag(TIF_32BIT_ADDR); \ 363 \ 364 if ((ex).e_ident[EI_CLASS] == ELFCLASS32) \ 365 __SET_PERSONALITY32(ex, state); \ 366 else \ 367 current->thread.abi = &mips_abi; \ 368 \ 369 current->thread.fpu.fcr31 = boot_cpu_data.fpu_csr31; \ 370 \ 371 p = personality(current->personality); \ 372 if (p != PER_LINUX32 && p != PER_LINUX) \ 373 set_personality(PER_LINUX); \ 374} while (0) 375 376#endif /* CONFIG_64BIT */ 377 378#define CORE_DUMP_USE_REGSET 379#define ELF_EXEC_PAGESIZE PAGE_SIZE 380 381/* This yields a mask that user programs can use to figure out what 382 instruction set this cpu supports. This could be done in userspace, 383 but it's not easy, and we've already done it here. */ 384 385#define ELF_HWCAP (0) 386 387/* 388 * This yields a string that ld.so will use to load implementation 389 * specific libraries for optimization. This is more specific in 390 * intent than poking at uname or /proc/cpuinfo. 391 */ 392 393#define ELF_PLATFORM __elf_platform 394extern const char *__elf_platform; 395 396/* 397 * See comments in asm-alpha/elf.h, this is the same thing 398 * on the MIPS. 399 */ 400#define ELF_PLAT_INIT(_r, load_addr) do { \ 401 _r->regs[1] = _r->regs[2] = _r->regs[3] = _r->regs[4] = 0; \ 402 _r->regs[5] = _r->regs[6] = _r->regs[7] = _r->regs[8] = 0; \ 403 _r->regs[9] = _r->regs[10] = _r->regs[11] = _r->regs[12] = 0; \ 404 _r->regs[13] = _r->regs[14] = _r->regs[15] = _r->regs[16] = 0; \ 405 _r->regs[17] = _r->regs[18] = _r->regs[19] = _r->regs[20] = 0; \ 406 _r->regs[21] = _r->regs[22] = _r->regs[23] = _r->regs[24] = 0; \ 407 _r->regs[25] = _r->regs[26] = _r->regs[27] = _r->regs[28] = 0; \ 408 _r->regs[30] = _r->regs[31] = 0; \ 409} while (0) 410 411/* This is the location that an ET_DYN program is loaded if exec'ed. Typical 412 use of this is to invoke "./ld.so someprog" to test out a new version of 413 the loader. We need to make sure that it is out of the way of the program 414 that it will "exec", and that there is sufficient room for the brk. */ 415 416#ifndef ELF_ET_DYN_BASE 417#define ELF_ET_DYN_BASE (TASK_SIZE / 3 * 2) 418#endif 419 420#define ARCH_HAS_SETUP_ADDITIONAL_PAGES 1 421struct linux_binprm; 422extern int arch_setup_additional_pages(struct linux_binprm *bprm, 423 int uses_interp); 424 425struct arch_elf_state { 426 int fp_abi; 427 int interp_fp_abi; 428 int overall_fp_mode; 429}; 430 431#define MIPS_ABI_FP_UNKNOWN (-1) /* Unknown FP ABI (kernel internal) */ 432 433#define INIT_ARCH_ELF_STATE { \ 434 .fp_abi = MIPS_ABI_FP_UNKNOWN, \ 435 .interp_fp_abi = MIPS_ABI_FP_UNKNOWN, \ 436 .overall_fp_mode = -1, \ 437} 438 439extern int arch_elf_pt_proc(void *ehdr, void *phdr, struct file *elf, 440 bool is_interp, struct arch_elf_state *state); 441 442extern int arch_check_elf(void *ehdr, bool has_interpreter, 443 struct arch_elf_state *state); 444 445extern void mips_set_personality_fp(struct arch_elf_state *state); 446 447#endif /* _ASM_ELF_H */ 448