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 #include <asm/auxvec.h>
  11
  12 /* PowerPC relocations defined by the ABIs */
  13 #define R_PPC_NONE              0
  14 #define R_PPC_ADDR32            1       /* 32bit absolute address */
  15 #define R_PPC_ADDR24            2       /* 26bit address, 2 bits ignored.  */
  16 #define R_PPC_ADDR16            3       /* 16bit absolute address */
  17 #define R_PPC_ADDR16_LO         4       /* lower 16bit of absolute address */
  18 #define R_PPC_ADDR16_HI         5       /* high 16bit of absolute address */
  19 #define R_PPC_ADDR16_HA         6       /* adjusted high 16bit */
  20 #define R_PPC_ADDR14            7       /* 16bit address, 2 bits ignored */
  21 #define R_PPC_ADDR14_BRTAKEN    8
  22 #define R_PPC_ADDR14_BRNTAKEN   9
  23 #define R_PPC_REL24             10      /* PC relative 26 bit */
  24 #define R_PPC_REL14             11      /* PC relative 16 bit */
  25 #define R_PPC_REL14_BRTAKEN     12
  26 #define R_PPC_REL14_BRNTAKEN    13
  27 #define R_PPC_GOT16             14
  28 #define R_PPC_GOT16_LO          15
  29 #define R_PPC_GOT16_HI          16
  30 #define R_PPC_GOT16_HA          17
  31 #define R_PPC_PLTREL24          18
  32 #define R_PPC_COPY              19
  33 #define R_PPC_GLOB_DAT          20
  34 #define R_PPC_JMP_SLOT          21
  35 #define R_PPC_RELATIVE          22
  36 #define R_PPC_LOCAL24PC         23
  37 #define R_PPC_UADDR32           24
  38 #define R_PPC_UADDR16           25
  39 #define R_PPC_REL32             26
  40 #define R_PPC_PLT32             27
  41 #define R_PPC_PLTREL32          28
  42 #define R_PPC_PLT16_LO          29
  43 #define R_PPC_PLT16_HI          30
  44 #define R_PPC_PLT16_HA          31
  45 #define R_PPC_SDAREL16          32
  46 #define R_PPC_SECTOFF           33
  47 #define R_PPC_SECTOFF_LO        34
  48 #define R_PPC_SECTOFF_HI        35
  49 #define R_PPC_SECTOFF_HA        36
  50 /* Keep this the last entry.  */
  51 #define R_PPC_NUM               37
  52
  53 #define ELF_NGREG       48      /* includes nip, msr, lr, etc. */
  54 #define ELF_NFPREG      33      /* includes fpscr */
  55 #define ELF_NVRREG      33      /* includes vscr */
  56 #define ELF_NEVRREG     34      /* includes acc (as 2) */
  57
  58 /*
  59  * These are used to set parameters in the core dumps.
  60  */
  61 #define ELF_ARCH        EM_PPC
  62 #define ELF_CLASS       ELFCLASS32
  63 #define ELF_DATA        ELFDATA2MSB
  64
  65 /* General registers */
  66 typedef unsigned long elf_greg_t;
  67 typedef elf_greg_t elf_gregset_t[ELF_NGREG];
  68
  69 /* Floating point registers */
  70 typedef double elf_fpreg_t;
  71 typedef elf_fpreg_t elf_fpregset_t[ELF_NFPREG];
  72
  73 /* Altivec registers */
  74 typedef __vector128 elf_vrreg_t;
  75 typedef elf_vrreg_t elf_vrregset_t[ELF_NVRREG];
  76
  77 #ifdef __KERNEL__
  78
  79 struct task_struct;
  80
  81 /*
  82  * This is used to ensure we don't load something for the wrong architecture.
  83  */
  84
  85 #define elf_check_arch(x) ((x)->e_machine == EM_PPC)
  86
  87 /* This is the location that an ET_DYN program is loaded if exec'ed.  Typical
  88    use of this is to invoke "./ld.so someprog" to test out a new version of
  89    the loader.  We need to make sure that it is out of the way of the program
  90    that it will "exec", and that there is sufficient room for the brk.  */
  91
  92 #define ELF_ET_DYN_BASE         (0x08000000)
  93
  94 #define USE_ELF_CORE_DUMP
  95 #define ELF_EXEC_PAGESIZE       4096
  96
  97 #define ELF_CORE_COPY_REGS(gregs, regs)                         \
  98         memcpy((gregs), (regs), sizeof(struct pt_regs));        \
  99         memset((char *)(gregs) + sizeof(struct pt_regs), 0,     \
 100                sizeof(elf_gregset_t) - sizeof(struct pt_regs));
 101
 102 #define ELF_CORE_COPY_TASK_REGS(t, elfregs)                     \
 103         ((t)->thread.regs?                                      \
 104          ({ ELF_CORE_COPY_REGS((elfregs), (t)->thread.regs); 1; }): 0)
 105
 106 extern int dump_task_fpu(struct task_struct *t, elf_fpregset_t *fpu);
 107 #define ELF_CORE_COPY_FPREGS(t, fpu)    dump_task_fpu((t), (fpu))
 108
 109 /* This yields a mask that user programs can use to figure out what
 110    instruction set this cpu supports.  This could be done in userspace,
 111    but it's not easy, and we've already done it here.  */
 112
 113 #define ELF_HWCAP       (cur_cpu_spec[0]->cpu_user_features)
 114
 115 /* This yields a string that ld.so will use to load implementation
 116    specific libraries for optimization.  This is more specific in
 117    intent than poking at uname or /proc/cpuinfo.
 118
 119    For the moment, we have only optimizations for the Intel generations,
 120    but that could change... */
 121
 122 #define ELF_PLATFORM    (NULL)
 123
 124 #define SET_PERSONALITY(ex, ibcs2) set_personality((ibcs2)?PER_SVR4:PER_LINUX)
 125
 126 extern int dcache_bsize;
 127 extern int icache_bsize;
 128 extern int ucache_bsize;
 129
 130 /*
 131  * The requirements here are:
 132  * - keep the final alignment of sp (sp & 0xf)
 133  * - make sure the 32-bit value at the first 16 byte aligned position of
 134  *   AUXV is greater than 16 for glibc compatibility.
 135  *   AT_IGNOREPPC is used for that.
 136  * - for compatibility with glibc ARCH_DLINFO must always be defined on PPC,
 137  *   even if DLINFO_ARCH_ITEMS goes to zero or is undefined.
 138  */
 139 #define ARCH_DLINFO                                                     \
 140 do {                                                                    \
 141         /* Handle glibc compatibility. */                               \
 142         NEW_AUX_ENT(AT_IGNOREPPC, AT_IGNOREPPC);                        \
 143         NEW_AUX_ENT(AT_IGNOREPPC, AT_IGNOREPPC);                        \
 144         /* Cache size items */                                          \
 145         NEW_AUX_ENT(AT_DCACHEBSIZE, dcache_bsize);                      \
 146         NEW_AUX_ENT(AT_ICACHEBSIZE, icache_bsize);                      \
 147         NEW_AUX_ENT(AT_UCACHEBSIZE, ucache_bsize);                      \
 148  } while (0)
 149
 150 #endif /* __KERNEL__ */
 151 #endif