arch/mips/include/asm/elf.h

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