include/asm-mips/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 #include <linux/config.h>
  12
  13 /* ELF header e_flags defines. */
  14 /* MIPS architecture level. */
  15 #define EF_MIPS_ARCH_1          0x00000000      /* -mips1 code.  */
  16 #define EF_MIPS_ARCH_2          0x10000000      /* -mips2 code.  */
  17 #define EF_MIPS_ARCH_3          0x20000000      /* -mips3 code.  */
  18 #define EF_MIPS_ARCH_4          0x30000000      /* -mips4 code.  */
  19 #define EF_MIPS_ARCH_5          0x40000000      /* -mips5 code.  */
  20 #define EF_MIPS_ARCH_32         0x50000000      /* MIPS32 code.  */
  21 #define EF_MIPS_ARCH_64         0x60000000      /* MIPS64 code.  */
  22 #define EF_MIPS_ARCH_32R2       0x70000000      /* MIPS32 R2 code.  */
  23 #define EF_MIPS_ARCH_64R2       0x80000000      /* MIPS64 R2 code.  */
  24
  25 /* The ABI of a file. */
  26 #define EF_MIPS_ABI_O32         0x00001000      /* O32 ABI.  */
  27 #define EF_MIPS_ABI_O64         0x00002000      /* O32 extended for 64 bit.  */
  28
  29 #define PT_MIPS_REGINFO         0x70000000
  30 #define PT_MIPS_RTPROC          0x70000001
  31 #define PT_MIPS_OPTIONS         0x70000002
  32
  33 /* Flags in the e_flags field of the header */
  34 #define EF_MIPS_NOREORDER       0x00000001
  35 #define EF_MIPS_PIC             0x00000002
  36 #define EF_MIPS_CPIC            0x00000004
  37 #define EF_MIPS_ABI2            0x00000020
  38 #define EF_MIPS_OPTIONS_FIRST   0x00000080
  39 #define EF_MIPS_32BITMODE       0x00000100
  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  * This is used to ensure we don't load something for the wrong architecture.
 181  */
 182 #define elf_check_arch(hdr)                                             \
 183 ({                                                                      \
 184         int __res = 1;                                                  \
 185         struct elfhdr *__h = (hdr);                                     \
 186                                                                         \
 187         if (__h->e_machine != EM_MIPS)                                  \
 188                 __res = 0;                                              \
 189         if (__h->e_ident[EI_CLASS] != ELFCLASS32)                       \
 190                 __res = 0;                                              \
 191         if ((__h->e_flags & EF_MIPS_ABI2) != 0)                         \
 192                 __res = 0;                                              \
 193         if (((__h->e_flags & EF_MIPS_ABI) != 0) &&                      \
 194             ((__h->e_flags & EF_MIPS_ABI) != EF_MIPS_ABI_O32))          \
 195                 __res = 0;                                              \
 196                                                                         \
 197         __res;                                                          \
 198 })
 199
 200 /*
 201  * These are used to set parameters in the core dumps.
 202  */
 203 #define ELF_CLASS       ELFCLASS32
 204
 205 #endif /* CONFIG_32BIT */
 206
 207 #ifdef CONFIG_64BIT
 208 /*
 209  * This is used to ensure we don't load something for the wrong architecture.
 210  */
 211 #define elf_check_arch(hdr)                                             \
 212 ({                                                                      \
 213         int __res = 1;                                                  \
 214         struct elfhdr *__h = (hdr);                                     \
 215                                                                         \
 216         if (__h->e_machine != EM_MIPS)                                  \
 217                 __res = 0;                                              \
 218         if (__h->e_ident[EI_CLASS] != ELFCLASS64)                       \
 219                 __res = 0;                                              \
 220                                                                         \
 221         __res;                                                          \
 222 })
 223
 224 /*
 225  * These are used to set parameters in the core dumps.
 226  */
 227 #define ELF_CLASS       ELFCLASS64
 228
 229 #endif /* CONFIG_64BIT */
 230
 231 /*
 232  * These are used to set parameters in the core dumps.
 233  */
 234 #ifdef __MIPSEB__
 235 #define ELF_DATA        ELFDATA2MSB
 236 #elif __MIPSEL__
 237 #define ELF_DATA        ELFDATA2LSB
 238 #endif
 239 #define ELF_ARCH        EM_MIPS
 240
 241 #endif /* !defined(ELF_ARCH) */
 242
 243 #ifdef __KERNEL__
 244
 245 struct mips_abi;
 246
 247 extern struct mips_abi mips_abi;
 248 extern struct mips_abi mips_abi_32;
 249 extern struct mips_abi mips_abi_n32;
 250
 251 #ifdef CONFIG_32BIT
 252
 253 #define SET_PERSONALITY(ex, ibcs2)                                      \
 254 do {                                                                    \
 255         if (ibcs2)                                                      \
 256                 set_personality(PER_SVR4);                              \
 257         set_personality(PER_LINUX);                                     \
 258                                                                         \
 259         current->thread.abi = &mips_abi;                                \
 260 } while (0)
 261
 262 #endif /* CONFIG_32BIT */
 263
 264 #ifdef CONFIG_64BIT
 265
 266 #ifdef CONFIG_MIPS32_N32
 267 #define __SET_PERSONALITY32_N32()                                       \
 268         do {                                                            \
 269                 current->thread.mflags |= MF_N32;                       \
 270                 current->thread.abi = &mips_abi_n32;                    \
 271         } while (0)
 272 #else
 273 #define __SET_PERSONALITY32_N32()                                       \
 274         do { } while (0)
 275 #endif
 276
 277 #ifdef CONFIG_MIPS32_O32
 278 #define __SET_PERSONALITY32_O32()                                       \
 279         do {                                                            \
 280                 current->thread.mflags |= MF_O32;                       \
 281                 current->thread.abi = &mips_abi_32;                     \
 282         } while (0)
 283 #else
 284 #define __SET_PERSONALITY32_O32()                                       \
 285         do { } while (0)
 286 #endif
 287
 288 #ifdef CONFIG_MIPS32_COMPAT
 289 #define __SET_PERSONALITY32(ex)                                         \
 290 do {                                                                    \
 291         if ((((ex).e_flags & EF_MIPS_ABI2) != 0) &&                     \
 292              ((ex).e_flags & EF_MIPS_ABI) == 0)                         \
 293                 __SET_PERSONALITY32_N32();                              \
 294         else                                                            \
 295                 __SET_PERSONALITY32_O32();                              \
 296 } while (0)
 297 #else
 298 #define __SET_PERSONALITY32(ex) do { } while (0)
 299 #endif
 300
 301 #define SET_PERSONALITY(ex, ibcs2)                                      \
 302 do {                                                                    \
 303         current->thread.mflags &= ~MF_ABI_MASK;                         \
 304         if ((ex).e_ident[EI_CLASS] == ELFCLASS32)                       \
 305                 __SET_PERSONALITY32(ex);                                \
 306         else {                                                          \
 307                 current->thread.mflags |= MF_N64;                       \
 308                 current->thread.abi = &mips_abi;                        \
 309         }                                                               \
 310                                                                         \
 311         if (ibcs2)                                                      \
 312                 set_personality(PER_SVR4);                              \
 313         else if (current->personality != PER_LINUX32)                   \
 314                 set_personality(PER_LINUX);                             \
 315 } while (0)
 316
 317 #endif /* CONFIG_64BIT */
 318
 319 struct task_struct;
 320
 321 extern void elf_dump_regs(elf_greg_t *, struct pt_regs *regs);
 322 extern int dump_task_regs (struct task_struct *, elf_gregset_t *);
 323 extern int dump_task_fpu(struct task_struct *, elf_fpregset_t *);
 324
 325 #define ELF_CORE_COPY_REGS(elf_regs, regs)                      \
 326         elf_dump_regs((elf_greg_t *)&(elf_regs), regs);
 327 #define ELF_CORE_COPY_TASK_REGS(tsk, elf_regs) dump_task_regs(tsk, elf_regs)
 328 #define ELF_CORE_COPY_FPREGS(tsk, elf_fpregs)                   \
 329         dump_task_fpu(tsk, elf_fpregs)
 330
 331 #endif /* __KERNEL__ */
 332
 333 #define USE_ELF_CORE_DUMP
 334 #define ELF_EXEC_PAGESIZE       PAGE_SIZE
 335
 336 /* This yields a mask that user programs can use to figure out what
 337    instruction set this cpu supports.  This could be done in userspace,
 338    but it's not easy, and we've already done it here.  */
 339
 340 #define ELF_HWCAP       (0)
 341
 342 /* This yields a string that ld.so will use to load implementation
 343    specific libraries for optimization.  This is more specific in
 344    intent than poking at uname or /proc/cpuinfo.
 345
 346    For the moment, we have only optimizations for the Intel generations,
 347    but that could change... */
 348
 349 #define ELF_PLATFORM  (NULL)
 350
 351 /*
 352  * See comments in asm-alpha/elf.h, this is the same thing
 353  * on the MIPS.
 354  */
 355 #define ELF_PLAT_INIT(_r, load_addr)    do { \
 356         _r->regs[1] = _r->regs[2] = _r->regs[3] = _r->regs[4] = 0;      \
 357         _r->regs[5] = _r->regs[6] = _r->regs[7] = _r->regs[8] = 0;      \
 358         _r->regs[9] = _r->regs[10] = _r->regs[11] = _r->regs[12] = 0;   \
 359         _r->regs[13] = _r->regs[14] = _r->regs[15] = _r->regs[16] = 0;  \
 360         _r->regs[17] = _r->regs[18] = _r->regs[19] = _r->regs[20] = 0;  \
 361         _r->regs[21] = _r->regs[22] = _r->regs[23] = _r->regs[24] = 0;  \
 362         _r->regs[25] = _r->regs[26] = _r->regs[27] = _r->regs[28] = 0;  \
 363         _r->regs[30] = _r->regs[31] = 0;                                \
 364 } while (0)
 365
 366 /* This is the location that an ET_DYN program is loaded if exec'ed.  Typical
 367    use of this is to invoke "./ld.so someprog" to test out a new version of
 368    the loader.  We need to make sure that it is out of the way of the program
 369    that it will "exec", and that there is sufficient room for the brk.  */
 370
 371 #ifndef ELF_ET_DYN_BASE
 372 #define ELF_ET_DYN_BASE         (TASK_SIZE / 3 * 2)
 373 #endif
 374
 375 #endif /* _ASM_ELF_H */