LXR linux-old/include/asm-ppc/elf.h

   1#ifndef __PPC_ELF_H
   2#define __PPC_ELF_H
   3
   4/*
   5 * ELF register definitions..
   6 */
   7#include <asm/types.h>
   8#include <asm/ptrace.h>
   9#include <asm/cputable.h>
  10
  11#define ELF_NGREG       48      /* includes nip, msr, lr, etc. */
  12#define ELF_NFPREG      33      /* includes fpscr */
  13#define ELF_NVRREG      33      /* includes vscr */
  14
  15/*
  16 * These are used to set parameters in the core dumps.
  17 */
  18#define ELF_ARCH        EM_PPC
  19#define ELF_CLASS       ELFCLASS32
  20#define ELF_DATA        ELFDATA2MSB
  21
  22/* General registers */
  23typedef unsigned long elf_greg_t;
  24typedef elf_greg_t elf_gregset_t[ELF_NGREG];
  25
  26/* Floating point registers */
  27typedef double elf_fpreg_t;
  28typedef elf_fpreg_t elf_fpregset_t[ELF_NFPREG];
  29
  30/* Altivec registers */
  31typedef __vector128 elf_vrreg_t;
  32typedef elf_vrreg_t elf_vrregset_t[ELF_NVRREG];
  33
  34#ifdef __KERNEL__
  35
  36/*
  37 * This is used to ensure we don't load something for the wrong architecture.
  38 */
  39
  40#define elf_check_arch(x) ((x)->e_machine == EM_PPC)
  41
  42/* This is the location that an ET_DYN program is loaded if exec'ed.  Typical
  43   use of this is to invoke "./ld.so someprog" to test out a new version of
  44   the loader.  We need to make sure that it is out of the way of the program
  45   that it will "exec", and that there is sufficient room for the brk.  */
  46
  47#define ELF_ET_DYN_BASE         (0x08000000)
  48
  49#define USE_ELF_CORE_DUMP
  50#define ELF_EXEC_PAGESIZE       4096
  51
  52#define ELF_CORE_COPY_REGS(gregs, regs) \
  53        memcpy(gregs, regs, \
  54               sizeof(struct pt_regs) < sizeof(elf_gregset_t)? \
  55               sizeof(struct pt_regs): sizeof(elf_gregset_t));
  56
  57
  58/* This yields a mask that user programs can use to figure out what
  59   instruction set this cpu supports.  This could be done in userspace,
  60   but it's not easy, and we've already done it here.  */
  61
  62#define ELF_HWCAP       (cur_cpu_spec[0]->cpu_user_features)
  63
  64/* This yields a string that ld.so will use to load implementation
  65   specific libraries for optimization.  This is more specific in
  66   intent than poking at uname or /proc/cpuinfo.
  67
  68   For the moment, we have only optimizations for the Intel generations,
  69   but that could change... */
  70
  71#define ELF_PLATFORM    (NULL)
  72
  73#define SET_PERSONALITY(ex, ibcs2) set_personality((ibcs2)?PER_SVR4:PER_LINUX)
  74
  75/*
  76 * We need to put in some extra aux table entries to tell glibc what
  77 * the cache block size is, so it can use the dcbz instruction safely.
  78 */
  79#define AT_DCACHEBSIZE          19
  80#define AT_ICACHEBSIZE          20
  81#define AT_UCACHEBSIZE          21
  82/* A special ignored type value for PPC, for glibc compatibility.  */
  83#define AT_IGNOREPPC            22
  84
  85extern int dcache_bsize;
  86extern int icache_bsize;
  87extern int ucache_bsize;
  88
  89/*
  90 * The requirements here are:
  91 * - keep the final alignment of sp (sp & 0xf)
  92 * - make sure the 32-bit value at the first 16 byte aligned position of
  93 *   AUXV is greater than 16 for glibc compatibility.
  94 *   AT_IGNOREPPC is used for that.
  95 * - for compatibility with glibc ARCH_DLINFO must always be defined on PPC,
  96 *   even if DLINFO_ARCH_ITEMS goes to zero or is undefined.
  97 */
  98#define DLINFO_ARCH_ITEMS       3
  99#define ARCH_DLINFO                                                     \
 100do {                                                                    \
 101        sp -= DLINFO_ARCH_ITEMS * 2;                                    \
 102        NEW_AUX_ENT(0, AT_DCACHEBSIZE, dcache_bsize);                   \
 103        NEW_AUX_ENT(1, AT_ICACHEBSIZE, icache_bsize);                   \
 104        NEW_AUX_ENT(2, AT_UCACHEBSIZE, ucache_bsize);                   \
 105        /*                                                              \
 106         * Now handle glibc compatibility.                              \
 107         */                                                             \
 108        sp -= 2*2;                                                      \
 109        NEW_AUX_ENT(0, AT_IGNOREPPC, AT_IGNOREPPC);                     \
 110        NEW_AUX_ENT(1, AT_IGNOREPPC, AT_IGNOREPPC);                     \
 111 } while (0)
 112
 113#endif /* __KERNEL__ */
 114#endif
 115