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   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_ABI             0x0000f000
  40 #define EF_MIPS_ARCH            0xf0000000
  41
  42 #define DT_MIPS_RLD_VERSION     0x70000001
  43 #define DT_MIPS_TIME_STAMP      0x70000002
  44 #define DT_MIPS_ICHECKSUM       0x70000003
  45 #define DT_MIPS_IVERSION        0x70000004
  46 #define DT_MIPS_FLAGS           0x70000005
  47         #define RHF_NONE        0x00000000
  48         #define RHF_HARDWAY     0x00000001
  49         #define RHF_NOTPOT      0x00000002
  50         #define RHF_SGI_ONLY    0x00000010
  51 #define DT_MIPS_BASE_ADDRESS    0x70000006
  52 #define DT_MIPS_CONFLICT        0x70000008
  53 #define DT_MIPS_LIBLIST         0x70000009
  54 #define DT_MIPS_LOCAL_GOTNO     0x7000000a
  55 #define DT_MIPS_CONFLICTNO      0x7000000b
  56 #define DT_MIPS_LIBLISTNO       0x70000010
  57 #define DT_MIPS_SYMTABNO        0x70000011
  58 #define DT_MIPS_UNREFEXTNO      0x70000012
  59 #define DT_MIPS_GOTSYM          0x70000013
  60 #define DT_MIPS_HIPAGENO        0x70000014
  61 #define DT_MIPS_RLD_MAP         0x70000016
  62
  63 #define R_MIPS_NONE             0
  64 #define R_MIPS_16               1
  65 #define R_MIPS_32               2
  66 #define R_MIPS_REL32            3
  67 #define R_MIPS_26               4
  68 #define R_MIPS_HI16             5
  69 #define R_MIPS_LO16             6
  70 #define R_MIPS_GPREL16          7
  71 #define R_MIPS_LITERAL          8
  72 #define R_MIPS_GOT16            9
  73 #define R_MIPS_PC16             10
  74 #define R_MIPS_CALL16           11
  75 #define R_MIPS_GPREL32          12
  76 /* The remaining relocs are defined on Irix, although they are not
  77    in the MIPS ELF ABI.  */
  78 #define R_MIPS_UNUSED1          13
  79 #define R_MIPS_UNUSED2          14
  80 #define R_MIPS_UNUSED3          15
  81 #define R_MIPS_SHIFT5           16
  82 #define R_MIPS_SHIFT6           17
  83 #define R_MIPS_64               18
  84 #define R_MIPS_GOT_DISP         19
  85 #define R_MIPS_GOT_PAGE         20
  86 #define R_MIPS_GOT_OFST         21
  87 /*
  88  * The following two relocation types are specified in the MIPS ABI
  89  * conformance guide version 1.2 but not yet in the psABI.
  90  */
  91 #define R_MIPS_GOTHI16          22
  92 #define R_MIPS_GOTLO16          23
  93 #define R_MIPS_SUB              24
  94 #define R_MIPS_INSERT_A         25
  95 #define R_MIPS_INSERT_B         26
  96 #define R_MIPS_DELETE           27
  97 #define R_MIPS_HIGHER           28
  98 #define R_MIPS_HIGHEST          29
  99 /*
 100  * The following two relocation types are specified in the MIPS ABI
 101  * conformance guide version 1.2 but not yet in the psABI.
 102  */
 103 #define R_MIPS_CALLHI16         30
 104 #define R_MIPS_CALLLO16         31
 105 /*
 106  * This range is reserved for vendor specific relocations.
 107  */
 108 #define R_MIPS_LOVENDOR         100
 109 #define R_MIPS_HIVENDOR         127
 110
 111 #define SHN_MIPS_ACCOMON        0xff00          /* Allocated common symbols */
 112 #define SHN_MIPS_TEXT           0xff01          /* Allocated test symbols.  */
 113 #define SHN_MIPS_DATA           0xff02          /* Allocated data symbols.  */
 114 #define SHN_MIPS_SCOMMON        0xff03          /* Small common symbols */
 115 #define SHN_MIPS_SUNDEFINED     0xff04          /* Small undefined symbols */
 116
 117 #define SHT_MIPS_LIST           0x70000000
 118 #define SHT_MIPS_CONFLICT       0x70000002
 119 #define SHT_MIPS_GPTAB          0x70000003
 120 #define SHT_MIPS_UCODE          0x70000004
 121 #define SHT_MIPS_DEBUG          0x70000005
 122 #define SHT_MIPS_REGINFO        0x70000006
 123 #define SHT_MIPS_PACKAGE        0x70000007
 124 #define SHT_MIPS_PACKSYM        0x70000008
 125 #define SHT_MIPS_RELD           0x70000009
 126 #define SHT_MIPS_IFACE          0x7000000b
 127 #define SHT_MIPS_CONTENT        0x7000000c
 128 #define SHT_MIPS_OPTIONS        0x7000000d
 129 #define SHT_MIPS_SHDR           0x70000010
 130 #define SHT_MIPS_FDESC          0x70000011
 131 #define SHT_MIPS_EXTSYM         0x70000012
 132 #define SHT_MIPS_DENSE          0x70000013
 133 #define SHT_MIPS_PDESC          0x70000014
 134 #define SHT_MIPS_LOCSYM         0x70000015
 135 #define SHT_MIPS_AUXSYM         0x70000016
 136 #define SHT_MIPS_OPTSYM         0x70000017
 137 #define SHT_MIPS_LOCSTR         0x70000018
 138 #define SHT_MIPS_LINE           0x70000019
 139 #define SHT_MIPS_RFDESC         0x7000001a
 140 #define SHT_MIPS_DELTASYM       0x7000001b
 141 #define SHT_MIPS_DELTAINST      0x7000001c
 142 #define SHT_MIPS_DELTACLASS     0x7000001d
 143 #define SHT_MIPS_DWARF          0x7000001e
 144 #define SHT_MIPS_DELTADECL      0x7000001f
 145 #define SHT_MIPS_SYMBOL_LIB     0x70000020
 146 #define SHT_MIPS_EVENTS         0x70000021
 147 #define SHT_MIPS_TRANSLATE      0x70000022
 148 #define SHT_MIPS_PIXIE          0x70000023
 149 #define SHT_MIPS_XLATE          0x70000024
 150 #define SHT_MIPS_XLATE_DEBUG    0x70000025
 151 #define SHT_MIPS_WHIRL          0x70000026
 152 #define SHT_MIPS_EH_REGION      0x70000027
 153 #define SHT_MIPS_XLATE_OLD      0x70000028
 154 #define SHT_MIPS_PDR_EXCEPTION  0x70000029
 155
 156 #define SHF_MIPS_GPREL          0x10000000
 157 #define SHF_MIPS_MERGE          0x20000000
 158 #define SHF_MIPS_ADDR           0x40000000
 159 #define SHF_MIPS_STRING         0x80000000
 160 #define SHF_MIPS_NOSTRIP        0x08000000
 161 #define SHF_MIPS_LOCAL          0x04000000
 162 #define SHF_MIPS_NAMES          0x02000000
 163 #define SHF_MIPS_NODUPES        0x01000000
 164
 165 #ifndef ELF_ARCH
 166 /* ELF register definitions */
 167 #define ELF_NGREG       45
 168 #define ELF_NFPREG      33
 169
 170 typedef unsigned long elf_greg_t;
 171 typedef elf_greg_t elf_gregset_t[ELF_NGREG];
 172
 173 typedef double elf_fpreg_t;
 174 typedef elf_fpreg_t elf_fpregset_t[ELF_NFPREG];
 175
 176 #ifdef CONFIG_32BIT
 177
 178 /*
 179  * This is used to ensure we don't load something for the wrong architecture.
 180  */
 181 #define elf_check_arch(hdr)                                             \
 182 ({                                                                      \
 183         int __res = 1;                                                  \
 184         struct elfhdr *__h = (hdr);                                     \
 185                                                                         \
 186         if (__h->e_machine != EM_MIPS)                                  \
 187                 __res = 0;                                              \
 188         if (__h->e_ident[EI_CLASS] != ELFCLASS32)                       \
 189                 __res = 0;                                              \
 190         if ((__h->e_flags & EF_MIPS_ABI2) != 0)                         \
 191                 __res = 0;                                              \
 192         if (((__h->e_flags & EF_MIPS_ABI) != 0) &&                      \
 193             ((__h->e_flags & EF_MIPS_ABI) != EF_MIPS_ABI_O32))          \
 194                 __res = 0;                                              \
 195                                                                         \
 196         __res;                                                          \
 197 })
 198
 199 /*
 200  * These are used to set parameters in the core dumps.
 201  */
 202 #define ELF_CLASS       ELFCLASS32
 203
 204 #endif /* CONFIG_32BIT */
 205
 206 #ifdef CONFIG_64BIT
 207 /*
 208  * This is used to ensure we don't load something for the wrong architecture.
 209  */
 210 #define elf_check_arch(hdr)                                             \
 211 ({                                                                      \
 212         int __res = 1;                                                  \
 213         struct elfhdr *__h = (hdr);                                     \
 214                                                                         \
 215         if (__h->e_machine != EM_MIPS)                                  \
 216                 __res = 0;                                              \
 217         if (__h->e_ident[EI_CLASS] != ELFCLASS64)                       \
 218                 __res = 0;                                              \
 219                                                                         \
 220         __res;                                                          \
 221 })
 222
 223 /*
 224  * These are used to set parameters in the core dumps.
 225  */
 226 #define ELF_CLASS       ELFCLASS64
 227
 228 #endif /* CONFIG_64BIT */
 229
 230 /*
 231  * These are used to set parameters in the core dumps.
 232  */
 233 #ifdef __MIPSEB__
 234 #define ELF_DATA        ELFDATA2MSB
 235 #elif __MIPSEL__
 236 #define ELF_DATA        ELFDATA2LSB
 237 #endif
 238 #define ELF_ARCH        EM_MIPS
 239
 240 #endif /* !defined(ELF_ARCH) */
 241
 242 struct mips_abi;
 243
 244 extern struct mips_abi mips_abi;
 245 extern struct mips_abi mips_abi_32;
 246 extern struct mips_abi mips_abi_n32;
 247
 248 #ifdef CONFIG_32BIT
 249
 250 #define SET_PERSONALITY(ex, ibcs2)                                      \
 251 do {                                                                    \
 252         if (ibcs2)                                                      \
 253                 set_personality(PER_SVR4);                              \
 254         set_personality(PER_LINUX);                                     \
 255                                                                         \
 256         current->thread.abi = &mips_abi;                                \
 257 } while (0)
 258
 259 #endif /* CONFIG_32BIT */
 260
 261 #ifdef CONFIG_64BIT
 262
 263 #ifdef CONFIG_MIPS32_N32
 264 #define __SET_PERSONALITY32_N32()                                       \
 265         do {                                                            \
 266                 set_thread_flag(TIF_32BIT_ADDR);                        \
 267                 current->thread.abi = &mips_abi_n32;                    \
 268         } while (0)
 269 #else
 270 #define __SET_PERSONALITY32_N32()                                       \
 271         do { } while (0)
 272 #endif
 273
 274 #ifdef CONFIG_MIPS32_O32
 275 #define __SET_PERSONALITY32_O32()                                       \
 276         do {                                                            \
 277                 set_thread_flag(TIF_32BIT_REGS);                        \
 278                 set_thread_flag(TIF_32BIT_ADDR);                        \
 279                 current->thread.abi = &mips_abi_32;                     \
 280         } while (0)
 281 #else
 282 #define __SET_PERSONALITY32_O32()                                       \
 283         do { } while (0)
 284 #endif
 285
 286 #ifdef CONFIG_MIPS32_COMPAT
 287 #define __SET_PERSONALITY32(ex)                                         \
 288 do {                                                                    \
 289         if ((((ex).e_flags & EF_MIPS_ABI2) != 0) &&                     \
 290              ((ex).e_flags & EF_MIPS_ABI) == 0)                         \
 291                 __SET_PERSONALITY32_N32();                              \
 292         else                                                            \
 293                 __SET_PERSONALITY32_O32();                              \
 294 } while (0)
 295 #else
 296 #define __SET_PERSONALITY32(ex) do { } while (0)
 297 #endif
 298
 299 #define SET_PERSONALITY(ex, ibcs2)                                      \
 300 do {                                                                    \
 301         clear_thread_flag(TIF_32BIT_REGS);                              \
 302         clear_thread_flag(TIF_32BIT_ADDR);                              \
 303                                                                         \
 304         if ((ex).e_ident[EI_CLASS] == ELFCLASS32)                       \
 305                 __SET_PERSONALITY32(ex);                                \
 306         else                                                            \
 307                 current->thread.abi = &mips_abi;                        \
 308                                                                         \
 309         if (ibcs2)                                                      \
 310                 set_personality(PER_SVR4);                              \
 311         else if (current->personality != PER_LINUX32)                   \
 312                 set_personality(PER_LINUX);                             \
 313 } while (0)
 314
 315 #endif /* CONFIG_64BIT */
 316
 317 struct task_struct;
 318
 319 extern void elf_dump_regs(elf_greg_t *, struct pt_regs *regs);
 320 extern int dump_task_regs(struct task_struct *, elf_gregset_t *);
 321 extern int dump_task_fpu(struct task_struct *, elf_fpregset_t *);
 322
 323 #define ELF_CORE_COPY_REGS(elf_regs, regs)                      \
 324         elf_dump_regs((elf_greg_t *)&(elf_regs), regs);
 325 #define ELF_CORE_COPY_TASK_REGS(tsk, elf_regs) dump_task_regs(tsk, elf_regs)
 326 #define ELF_CORE_COPY_FPREGS(tsk, elf_fpregs)                   \
 327         dump_task_fpu(tsk, elf_fpregs)
 328
 329 #define USE_ELF_CORE_DUMP
 330 #define ELF_EXEC_PAGESIZE       PAGE_SIZE
 331
 332 /* This yields a mask that user programs can use to figure out what
 333    instruction set this cpu supports.  This could be done in userspace,
 334    but it's not easy, and we've already done it here.  */
 335
 336 #define ELF_HWCAP       (0)
 337
 338 /* This yields a string that ld.so will use to load implementation
 339    specific libraries for optimization.  This is more specific in
 340    intent than poking at uname or /proc/cpuinfo.
 341
 342    For the moment, we have only optimizations for the Intel generations,
 343    but that could change... */
 344
 345 #define ELF_PLATFORM  (NULL)
 346
 347 /*
 348  * See comments in asm-alpha/elf.h, this is the same thing
 349  * on the MIPS.
 350  */
 351 #define ELF_PLAT_INIT(_r, load_addr)    do { \
 352         _r->regs[1] = _r->regs[2] = _r->regs[3] = _r->regs[4] = 0;      \
 353         _r->regs[5] = _r->regs[6] = _r->regs[7] = _r->regs[8] = 0;      \
 354         _r->regs[9] = _r->regs[10] = _r->regs[11] = _r->regs[12] = 0;   \
 355         _r->regs[13] = _r->regs[14] = _r->regs[15] = _r->regs[16] = 0;  \
 356         _r->regs[17] = _r->regs[18] = _r->regs[19] = _r->regs[20] = 0;  \
 357         _r->regs[21] = _r->regs[22] = _r->regs[23] = _r->regs[24] = 0;  \
 358         _r->regs[25] = _r->regs[26] = _r->regs[27] = _r->regs[28] = 0;  \
 359         _r->regs[30] = _r->regs[31] = 0;                                \
 360 } while (0)
 361
 362 /* This is the location that an ET_DYN program is loaded if exec'ed.  Typical
 363    use of this is to invoke "./ld.so someprog" to test out a new version of
 364    the loader.  We need to make sure that it is out of the way of the program
 365    that it will "exec", and that there is sufficient room for the brk.  */
 366
 367 #ifndef ELF_ET_DYN_BASE
 368 #define ELF_ET_DYN_BASE         (TASK_SIZE / 3 * 2)
 369 #endif
 370
 371 #endif /* _ASM_ELF_H */