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
 123 #define SHF_MIPS_GPREL  0x10000000
 124
 125 #ifndef ELF_ARCH
 126 /* ELF register definitions */
 127 #define ELF_NGREG       45
 128 #define ELF_NFPREG      33
 129
 130 typedef unsigned long elf_greg_t;
 131 typedef elf_greg_t elf_gregset_t[ELF_NGREG];
 132
 133 typedef double elf_fpreg_t;
 134 typedef elf_fpreg_t elf_fpregset_t[ELF_NFPREG];
 135
 136 #ifdef CONFIG_32BIT
 137
 138 /*
 139  * This is used to ensure we don't load something for the wrong architecture.
 140  */
 141 #define elf_check_arch(hdr)                                             \
 142 ({                                                                      \
 143         int __res = 1;                                                  \
 144         struct elfhdr *__h = (hdr);                                     \
 145                                                                         \
 146         if (__h->e_machine != EM_MIPS)                                  \
 147                 __res = 0;                                              \
 148         if (__h->e_ident[EI_CLASS] != ELFCLASS32)                       \
 149                 __res = 0;                                              \
 150         if ((__h->e_flags & EF_MIPS_ABI2) != 0)                         \
 151                 __res = 0;                                              \
 152         if (((__h->e_flags & EF_MIPS_ABI) != 0) &&                      \
 153             ((__h->e_flags & EF_MIPS_ABI) != EF_MIPS_ABI_O32))          \
 154                 __res = 0;                                              \
 155                                                                         \
 156         __res;                                                          \
 157 })
 158
 159 /*
 160  * These are used to set parameters in the core dumps.
 161  */
 162 #define ELF_CLASS       ELFCLASS32
 163
 164 #endif /* CONFIG_32BIT */
 165
 166 #ifdef CONFIG_64BIT
 167 /*
 168  * This is used to ensure we don't load something for the wrong architecture.
 169  */
 170 #define elf_check_arch(hdr)                                             \
 171 ({                                                                      \
 172         int __res = 1;                                                  \
 173         struct elfhdr *__h = (hdr);                                     \
 174                                                                         \
 175         if (__h->e_machine != EM_MIPS)                                  \
 176                 __res = 0;                                              \
 177         if (__h->e_ident[EI_CLASS] != ELFCLASS64)                       \
 178                 __res = 0;                                              \
 179                                                                         \
 180         __res;                                                          \
 181 })
 182
 183 /*
 184  * These are used to set parameters in the core dumps.
 185  */
 186 #define ELF_CLASS       ELFCLASS64
 187
 188 #endif /* CONFIG_64BIT */
 189
 190 /*
 191  * These are used to set parameters in the core dumps.
 192  */
 193 #ifdef __MIPSEB__
 194 #define ELF_DATA        ELFDATA2MSB
 195 #elif __MIPSEL__
 196 #define ELF_DATA        ELFDATA2LSB
 197 #endif
 198 #define ELF_ARCH        EM_MIPS
 199
 200 #endif /* !defined(ELF_ARCH) */
 201
 202 #ifdef __KERNEL__
 203
 204 struct mips_abi;
 205
 206 extern struct mips_abi mips_abi;
 207 extern struct mips_abi mips_abi_32;
 208 extern struct mips_abi mips_abi_n32;
 209
 210 #ifdef CONFIG_32BIT
 211
 212 #define SET_PERSONALITY(ex, ibcs2)                                      \
 213 do {                                                                    \
 214         if (ibcs2)                                                      \
 215                 set_personality(PER_SVR4);                              \
 216         set_personality(PER_LINUX);                                     \
 217                                                                         \
 218         current->thread.abi = &mips_abi;                                \
 219 } while (0)
 220
 221 #endif /* CONFIG_32BIT */
 222
 223 #ifdef CONFIG_64BIT
 224
 225 #ifdef CONFIG_MIPS32_N32
 226 #define __SET_PERSONALITY32_N32()                                       \
 227         do {                                                            \
 228                 current->thread.mflags |= MF_N32;                       \
 229                 current->thread.abi = &mips_abi_n32;                    \
 230         } while (0)
 231 #else
 232 #define __SET_PERSONALITY32_N32()                                       \
 233         do { } while (0)
 234 #endif
 235
 236 #ifdef CONFIG_MIPS32_O32
 237 #define __SET_PERSONALITY32_O32()                                       \
 238         do {                                                            \
 239                 current->thread.mflags |= MF_O32;                       \
 240                 current->thread.abi = &mips_abi_32;                     \
 241         } while (0)
 242 #else
 243 #define __SET_PERSONALITY32_O32()                                       \
 244         do { } while (0)
 245 #endif
 246
 247 #ifdef CONFIG_MIPS32_COMPAT
 248 #define __SET_PERSONALITY32(ex)                                         \
 249 do {                                                                    \
 250         if ((((ex).e_flags & EF_MIPS_ABI2) != 0) &&                     \
 251              ((ex).e_flags & EF_MIPS_ABI) == 0)                         \
 252                 __SET_PERSONALITY32_N32();                              \
 253         else                                                            \
 254                 __SET_PERSONALITY32_O32();                              \
 255 } while (0)
 256 #else
 257 #define __SET_PERSONALITY32(ex) do { } while (0)
 258 #endif
 259
 260 #define SET_PERSONALITY(ex, ibcs2)                                      \
 261 do {                                                                    \
 262         current->thread.mflags &= ~MF_ABI_MASK;                         \
 263         if ((ex).e_ident[EI_CLASS] == ELFCLASS32)                       \
 264                 __SET_PERSONALITY32(ex);                                \
 265         else {                                                          \
 266                 current->thread.mflags |= MF_N64;                       \
 267                 current->thread.abi = &mips_abi;                        \
 268         }                                                               \
 269                                                                         \
 270         if (ibcs2)                                                      \
 271                 set_personality(PER_SVR4);                              \
 272         else if (current->personality != PER_LINUX32)                   \
 273                 set_personality(PER_LINUX);                             \
 274 } while (0)
 275
 276 #endif /* CONFIG_64BIT */
 277
 278 struct task_struct;
 279
 280 extern void elf_dump_regs(elf_greg_t *, struct pt_regs *regs);
 281 extern int dump_task_regs (struct task_struct *, elf_gregset_t *);
 282 extern int dump_task_fpu(struct task_struct *, elf_fpregset_t *);
 283
 284 #define ELF_CORE_COPY_REGS(elf_regs, regs)                      \
 285         elf_dump_regs((elf_greg_t *)&(elf_regs), regs);
 286 #define ELF_CORE_COPY_TASK_REGS(tsk, elf_regs) dump_task_regs(tsk, elf_regs)
 287 #define ELF_CORE_COPY_FPREGS(tsk, elf_fpregs)                   \
 288         dump_task_fpu(tsk, elf_fpregs)
 289
 290 #endif /* __KERNEL__ */
 291
 292 #define USE_ELF_CORE_DUMP
 293 #define ELF_EXEC_PAGESIZE       PAGE_SIZE
 294
 295 /* This yields a mask that user programs can use to figure out what
 296    instruction set this cpu supports.  This could be done in userspace,
 297    but it's not easy, and we've already done it here.  */
 298
 299 #define ELF_HWCAP       (0)
 300
 301 /* This yields a string that ld.so will use to load implementation
 302    specific libraries for optimization.  This is more specific in
 303    intent than poking at uname or /proc/cpuinfo.
 304
 305    For the moment, we have only optimizations for the Intel generations,
 306    but that could change... */
 307
 308 #define ELF_PLATFORM  (NULL)
 309
 310 /*
 311  * See comments in asm-alpha/elf.h, this is the same thing
 312  * on the MIPS.
 313  */
 314 #define ELF_PLAT_INIT(_r, load_addr)    do { \
 315         _r->regs[1] = _r->regs[2] = _r->regs[3] = _r->regs[4] = 0;      \
 316         _r->regs[5] = _r->regs[6] = _r->regs[7] = _r->regs[8] = 0;      \
 317         _r->regs[9] = _r->regs[10] = _r->regs[11] = _r->regs[12] = 0;   \
 318         _r->regs[13] = _r->regs[14] = _r->regs[15] = _r->regs[16] = 0;  \
 319         _r->regs[17] = _r->regs[18] = _r->regs[19] = _r->regs[20] = 0;  \
 320         _r->regs[21] = _r->regs[22] = _r->regs[23] = _r->regs[24] = 0;  \
 321         _r->regs[25] = _r->regs[26] = _r->regs[27] = _r->regs[28] = 0;  \
 322         _r->regs[30] = _r->regs[31] = 0;                                \
 323 } while (0)
 324
 325 /* This is the location that an ET_DYN program is loaded if exec'ed.  Typical
 326    use of this is to invoke "./ld.so someprog" to test out a new version of
 327    the loader.  We need to make sure that it is out of the way of the program
 328    that it will "exec", and that there is sufficient room for the brk.  */
 329
 330 #ifndef ELF_ET_DYN_BASE
 331 #define ELF_ET_DYN_BASE         (TASK_SIZE / 3 * 2)
 332 #endif
 333
 334 #endif /* _ASM_ELF_H */