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 /* PowerPC relocations defined by the ABIs */
  12 #define R_PPC_NONE              0
  13 #define R_PPC_ADDR32            1       /* 32bit absolute address */
  14 #define R_PPC_ADDR24            2       /* 26bit address, 2 bits ignored.  */
  15 #define R_PPC_ADDR16            3       /* 16bit absolute address */
  16 #define R_PPC_ADDR16_LO         4       /* lower 16bit of absolute address */
  17 #define R_PPC_ADDR16_HI         5       /* high 16bit of absolute address */
  18 #define R_PPC_ADDR16_HA         6       /* adjusted high 16bit */
  19 #define R_PPC_ADDR14            7       /* 16bit address, 2 bits ignored */
  20 #define R_PPC_ADDR14_BRTAKEN    8
  21 #define R_PPC_ADDR14_BRNTAKEN   9
  22 #define R_PPC_REL24             10      /* PC relative 26 bit */
  23 #define R_PPC_REL14             11      /* PC relative 16 bit */
  24 #define R_PPC_REL14_BRTAKEN     12
  25 #define R_PPC_REL14_BRNTAKEN    13
  26 #define R_PPC_GOT16             14
  27 #define R_PPC_GOT16_LO          15
  28 #define R_PPC_GOT16_HI          16
  29 #define R_PPC_GOT16_HA          17
  30 #define R_PPC_PLTREL24          18
  31 #define R_PPC_COPY              19
  32 #define R_PPC_GLOB_DAT          20
  33 #define R_PPC_JMP_SLOT          21
  34 #define R_PPC_RELATIVE          22
  35 #define R_PPC_LOCAL24PC         23
  36 #define R_PPC_UADDR32           24
  37 #define R_PPC_UADDR16           25
  38 #define R_PPC_REL32             26
  39 #define R_PPC_PLT32             27
  40 #define R_PPC_PLTREL32          28
  41 #define R_PPC_PLT16_LO          29
  42 #define R_PPC_PLT16_HI          30
  43 #define R_PPC_PLT16_HA          31
  44 #define R_PPC_SDAREL16          32
  45 #define R_PPC_SECTOFF           33
  46 #define R_PPC_SECTOFF_LO        34
  47 #define R_PPC_SECTOFF_HI        35
  48 #define R_PPC_SECTOFF_HA        36
  49 /* Keep this the last entry.  */
  50 #define R_PPC_NUM               37
  51
  52 #define ELF_NGREG       48      /* includes nip, msr, lr, etc. */
  53 #define ELF_NFPREG      33      /* includes fpscr */
  54 #define ELF_NVRREG      33      /* includes vscr */
  55 #define ELF_NEVRREG     34      /* includes acc (as 2) */
  56
  57 /*
  58  * These are used to set parameters in the core dumps.
  59  */
  60 #define ELF_ARCH        EM_PPC
  61 #define ELF_CLASS       ELFCLASS32
  62 #define ELF_DATA        ELFDATA2MSB
  63
  64 /* General registers */
  65 typedef unsigned long elf_greg_t;
  66 typedef elf_greg_t elf_gregset_t[ELF_NGREG];
  67
  68 /* Floating point registers */
  69 typedef double elf_fpreg_t;
  70 typedef elf_fpreg_t elf_fpregset_t[ELF_NFPREG];
  71
  72 /* Altivec registers */
  73 typedef __vector128 elf_vrreg_t;
  74 typedef elf_vrreg_t elf_vrregset_t[ELF_NVRREG];
  75
  76 #ifdef __KERNEL__
  77
  78 struct task_struct;
  79
  80 /*
  81  * This is used to ensure we don't load something for the wrong architecture.
  82  */
  83
  84 #define elf_check_arch(x) ((x)->e_machine == EM_PPC)
  85
  86 /* This is the location that an ET_DYN program is loaded if exec'ed.  Typical
  87    use of this is to invoke "./ld.so someprog" to test out a new version of
  88    the loader.  We need to make sure that it is out of the way of the program
  89    that it will "exec", and that there is sufficient room for the brk.  */
  90
  91 #define ELF_ET_DYN_BASE         (0x08000000)
  92
  93 #define USE_ELF_CORE_DUMP
  94 #define ELF_EXEC_PAGESIZE       4096
  95
  96 #define ELF_CORE_COPY_REGS(gregs, regs)                         \
  97         memcpy((gregs), (regs), sizeof(struct pt_regs));        \
  98         memset((char *)(gregs) + sizeof(struct pt_regs), 0,     \
  99                sizeof(elf_gregset_t) - sizeof(struct pt_regs));
 100
 101 #define ELF_CORE_COPY_TASK_REGS(t, elfregs)                     \
 102         ((t)->thread.regs?                                      \
 103          ({ ELF_CORE_COPY_REGS((elfregs), (t)->thread.regs); 1; }): 0)
 104
 105 extern int dump_task_fpu(struct task_struct *t, elf_fpregset_t *fpu);
 106 #define ELF_CORE_COPY_FPREGS(t, fpu)    dump_task_fpu((t), (fpu))
 107
 108 /* This yields a mask that user programs can use to figure out what
 109    instruction set this cpu supports.  This could be done in userspace,
 110    but it's not easy, and we've already done it here.  */
 111
 112 #define ELF_HWCAP       (cur_cpu_spec[0]->cpu_user_features)
 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    For the moment, we have only optimizations for the Intel generations,
 119    but that could change... */
 120
 121 #define ELF_PLATFORM    (NULL)
 122
 123 #define SET_PERSONALITY(ex, ibcs2) set_personality((ibcs2)?PER_SVR4:PER_LINUX)
 124
 125 /*
 126  * We need to put in some extra aux table entries to tell glibc what
 127  * the cache block size is, so it can use the dcbz instruction safely.
 128  */
 129 #define AT_DCACHEBSIZE          19
 130 #define AT_ICACHEBSIZE          20
 131 #define AT_UCACHEBSIZE          21
 132 /* A special ignored type value for PPC, for glibc compatibility.  */
 133 #define AT_IGNOREPPC            22
 134
 135 extern int dcache_bsize;
 136 extern int icache_bsize;
 137 extern int ucache_bsize;
 138
 139 /*
 140  * The requirements here are:
 141  * - keep the final alignment of sp (sp & 0xf)
 142  * - make sure the 32-bit value at the first 16 byte aligned position of
 143  *   AUXV is greater than 16 for glibc compatibility.
 144  *   AT_IGNOREPPC is used for that.
 145  * - for compatibility with glibc ARCH_DLINFO must always be defined on PPC,
 146  *   even if DLINFO_ARCH_ITEMS goes to zero or is undefined.
 147  */
 148 #define ARCH_DLINFO                                                     \
 149 do {                                                                    \
 150         /* Handle glibc compatibility. */                               \
 151         NEW_AUX_ENT(AT_IGNOREPPC, AT_IGNOREPPC);                        \
 152         NEW_AUX_ENT(AT_IGNOREPPC, AT_IGNOREPPC);                        \
 153         /* Cache size items */                                          \
 154         NEW_AUX_ENT(AT_DCACHEBSIZE, dcache_bsize);                      \
 155         NEW_AUX_ENT(AT_ICACHEBSIZE, icache_bsize);                      \
 156         NEW_AUX_ENT(AT_UCACHEBSIZE, ucache_bsize);                      \
 157  } while (0)
 158
 159 #endif /* __KERNEL__ */
 160 #endif