include/asm-alpha/elf.h

   1 #ifndef __ASM_ALPHA_ELF_H
   2 #define __ASM_ALPHA_ELF_H
   3
   4 /*
   5  * ELF register definitions..
   6  */
   7
   8 /*
   9  * The OSF/1 version of <sys/procfs.h> makes gregset_t 46 entries long.
  10  * I have no idea why that is so.  For now, we just leave it at 33
  11  * (32 general regs + processor status word).
  12  */
  13 #define ELF_NGREG       33
  14 #define ELF_NFPREG      32
  15
  16 typedef unsigned long elf_greg_t;
  17 typedef elf_greg_t elf_gregset_t[ELF_NGREG];
  18
  19 typedef double elf_fpreg_t;
  20 typedef elf_fpreg_t elf_fpregset_t[ELF_NFPREG];
  21
  22 /*
  23  * This is used to ensure we don't load something for the wrong architecture.
  24  */
  25 #define elf_check_arch(x) ((x) == EM_ALPHA)
  26
  27 /*
  28  * These are used to set parameters in the core dumps.
  29  */
  30 #define ELF_CLASS       ELFCLASS64
  31 #define ELF_DATA        ELFDATA2LSB
  32 #define ELF_ARCH        EM_ALPHA
  33
  34 #define USE_ELF_CORE_DUMP
  35 #define ELF_EXEC_PAGESIZE       8192
  36
  37 /* This is the location that an ET_DYN program is loaded if exec'ed.  Typical
  38    use of this is to invoke "./ld.so someprog" to test out a new version of
  39    the loader.  We need to make sure that it is out of the way of the program
  40    that it will "exec", and that there is sufficient room for the brk.  */
  41
  42 #define ELF_ET_DYN_BASE         (TASK_UNMAPPED_BASE + 0x1000000)
  43
  44 /* $0 is set by ld.so to a pointer to a function which might be
  45    registered using atexit.  This provides a mean for the dynamic
  46    linker to call DT_FINI functions for shared libraries that have
  47    been loaded before the code runs.
  48
  49    So that we can use the same startup file with static executables,
  50    we start programs with a value of 0 to indicate that there is no
  51    such function.  */
  52
  53 #define ELF_PLAT_INIT(_r)       _r->r0 = 0
  54
  55 /* Use the same format as the OSF/1 procfs interface.  The register
  56    layout is sane.  However, since dump_thread() creates the funky
  57    layout that ECOFF coredumps want, we need to undo that layout here.
  58    Eventually, it would be nice if the ECOFF core-dump had to do the
  59    translation, then ELF_CORE_COPY_REGS() would become trivial and
  60    faster.  */
  61 #define ELF_CORE_COPY_REGS(_dest,_regs)                         \
  62 {                                                               \
  63         struct user _dump;                                      \
  64                                                                 \
  65         dump_thread(_regs, &_dump);                             \
  66         _dest[ 0] = _dump.regs[EF_V0];                          \
  67         _dest[ 1] = _dump.regs[EF_T0];                          \
  68         _dest[ 2] = _dump.regs[EF_T1];                          \
  69         _dest[ 3] = _dump.regs[EF_T2];                          \
  70         _dest[ 4] = _dump.regs[EF_T3];                          \
  71         _dest[ 5] = _dump.regs[EF_T4];                          \
  72         _dest[ 6] = _dump.regs[EF_T5];                          \
  73         _dest[ 7] = _dump.regs[EF_T6];                          \
  74         _dest[ 8] = _dump.regs[EF_T7];                          \
  75         _dest[ 9] = _dump.regs[EF_S0];                          \
  76         _dest[10] = _dump.regs[EF_S1];                          \
  77         _dest[11] = _dump.regs[EF_S2];                          \
  78         _dest[12] = _dump.regs[EF_S3];                          \
  79         _dest[13] = _dump.regs[EF_S4];                          \
  80         _dest[14] = _dump.regs[EF_S5];                          \
  81         _dest[15] = _dump.regs[EF_S6];                          \
  82         _dest[16] = _dump.regs[EF_A0];                          \
  83         _dest[17] = _dump.regs[EF_A1];                          \
  84         _dest[18] = _dump.regs[EF_A2];                          \
  85         _dest[19] = _dump.regs[EF_A3];                          \
  86         _dest[20] = _dump.regs[EF_A4];                          \
  87         _dest[21] = _dump.regs[EF_A5];                          \
  88         _dest[22] = _dump.regs[EF_T8];                          \
  89         _dest[23] = _dump.regs[EF_T9];                          \
  90         _dest[24] = _dump.regs[EF_T10];                         \
  91         _dest[25] = _dump.regs[EF_T11];                         \
  92         _dest[26] = _dump.regs[EF_RA];                          \
  93         _dest[27] = _dump.regs[EF_T12];                         \
  94         _dest[28] = _dump.regs[EF_AT];                          \
  95         _dest[29] = _dump.regs[EF_GP];                          \
  96         _dest[30] = _dump.regs[EF_SP];                          \
  97         _dest[31] = _dump.regs[EF_PC];  /* store PC here */     \
  98         _dest[32] = _dump.regs[EF_PS];                          \
  99 }
 100
 101 /* This yields a mask that user programs can use to figure out what
 102    instruction set this CPU supports.  This is trivial on Alpha,
 103    but not so on other machines. */
 104
 105 #define ELF_HWCAP                                                       \
 106 ({                                                                      \
 107         /* Sadly, most folks don't yet have assemblers that know about  \
 108            amask.  This is "amask v0, v0" */                            \
 109         register long _v0 __asm("$0") = -1;                             \
 110         __asm(".long 0x47e00c20" : "=r"(_v0) : "0"(_v0));               \
 111         ~_v0;                                                           \
 112 })
 113
 114 /* This yields a string that ld.so will use to load implementation
 115    specific libraries for optimization.  This is more specific in
 116    intent than poking at uname or /proc/cpuinfo.
 117
 118    This might do with checking bwx simultaneously...  */
 119
 120 #define ELF_PLATFORM                            \
 121 ({                                              \
 122         /* Or "implver v0" ... */               \
 123         register long _v0 __asm("$0");          \
 124         __asm(".long 0x47e03d80" : "=r"(_v0));  \
 125         _v0 == 0 ? "ev4" : "ev5";               \
 126 })
 127
 128 #ifdef __KERNEL__
 129 #define SET_PERSONALITY(EX, IBCS2)                              \
 130         current->personality =                                  \
 131           ((EX).e_flags & EF_ALPHA_32BIT                        \
 132            ? PER_LINUX_32BIT : (IBCS2) ? PER_SVR4 : PER_LINUX)
 133 #endif
 134
 135 #endif