arch/c6x/include/asm/elf.h

   1 /*
   2  *  Port on Texas Instruments TMS320C6x architecture
   3  *
   4  *  Copyright (C) 2004, 2009, 2010 Texas Instruments Incorporated
   5  *  Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com)
   6  *
   7  *  This program is free software; you can redistribute it and/or modify
   8  *  it under the terms of the GNU General Public License version 2 as
   9  *  published by the Free Software Foundation.
  10  */
  11 #ifndef _ASM_C6X_ELF_H
  12 #define _ASM_C6X_ELF_H
  13
  14 /*
  15  * ELF register definitions..
  16  */
  17 #include <asm/ptrace.h>
  18
  19 typedef unsigned long elf_greg_t;
  20 typedef unsigned long elf_fpreg_t;
  21
  22 #define ELF_NGREG  58
  23 #define ELF_NFPREG 1
  24
  25 typedef elf_greg_t elf_gregset_t[ELF_NGREG];
  26 typedef elf_fpreg_t elf_fpregset_t[ELF_NFPREG];
  27
  28 /*
  29  * This is used to ensure we don't load something for the wrong architecture.
  30  */
  31 #define elf_check_arch(x) ((x)->e_machine == EM_TI_C6000)
  32
  33 #define elf_check_fdpic(x) (1)
  34 #define elf_check_const_displacement(x) (0)
  35
  36 #define ELF_FDPIC_PLAT_INIT(_regs, _exec_map, _interp_map, _dynamic_addr) \
  37 do {                                                            \
  38         _regs->b4       = (_exec_map);                          \
  39         _regs->a6       = (_interp_map);                        \
  40         _regs->b6       = (_dynamic_addr);                      \
  41 } while (0)
  42
  43 #define ELF_FDPIC_CORE_EFLAGS   0
  44
  45 #define ELF_CORE_COPY_FPREGS(...) 0 /* No FPU regs to copy */
  46
  47 /*
  48  * These are used to set parameters in the core dumps.
  49  */
  50 #ifdef __LITTLE_ENDIAN__
  51 #define ELF_DATA        ELFDATA2LSB
  52 #else
  53 #define ELF_DATA        ELFDATA2MSB
  54 #endif
  55
  56 #define ELF_CLASS       ELFCLASS32
  57 #define ELF_ARCH        EM_TI_C6000
  58
  59 /* Nothing for now. Need to setup DP... */
  60 #define ELF_PLAT_INIT(_r)
  61
  62 #define USE_ELF_CORE_DUMP
  63 #define ELF_EXEC_PAGESIZE       4096
  64
  65 #define ELF_CORE_COPY_REGS(_dest, _regs)                \
  66         memcpy((char *) &_dest, (char *) _regs,         \
  67         sizeof(struct pt_regs));
  68
  69 /* This yields a mask that user programs can use to figure out what
  70    instruction set this cpu supports.  */
  71
  72 #define ELF_HWCAP       (0)
  73
  74 /* This yields a string that ld.so will use to load implementation
  75    specific libraries for optimization.  This is more specific in
  76    intent than poking at uname or /proc/cpuinfo.  */
  77
  78 #define ELF_PLATFORM  (NULL)
  79
  80 /* C6X specific section types */
  81 #define SHT_C6000_UNWIND        0x70000001
  82 #define SHT_C6000_PREEMPTMAP    0x70000002
  83 #define SHT_C6000_ATTRIBUTES    0x70000003
  84
  85 /* C6X specific DT_ tags */
  86 #define DT_C6000_DSBT_BASE      0x70000000
  87 #define DT_C6000_DSBT_SIZE      0x70000001
  88 #define DT_C6000_PREEMPTMAP     0x70000002
  89 #define DT_C6000_DSBT_INDEX     0x70000003
  90
  91 /* C6X specific relocs */
  92 #define R_C6000_NONE            0
  93 #define R_C6000_ABS32           1
  94 #define R_C6000_ABS16           2
  95 #define R_C6000_ABS8            3
  96 #define R_C6000_PCR_S21         4
  97 #define R_C6000_PCR_S12         5
  98 #define R_C6000_PCR_S10         6
  99 #define R_C6000_PCR_S7          7
 100 #define R_C6000_ABS_S16         8
 101 #define R_C6000_ABS_L16         9
 102 #define R_C6000_ABS_H16         10
 103 #define R_C6000_SBR_U15_B       11
 104 #define R_C6000_SBR_U15_H       12
 105 #define R_C6000_SBR_U15_W       13
 106 #define R_C6000_SBR_S16         14
 107 #define R_C6000_SBR_L16_B       15
 108 #define R_C6000_SBR_L16_H       16
 109 #define R_C6000_SBR_L16_W       17
 110 #define R_C6000_SBR_H16_B       18
 111 #define R_C6000_SBR_H16_H       19
 112 #define R_C6000_SBR_H16_W       20
 113 #define R_C6000_SBR_GOT_U15_W   21
 114 #define R_C6000_SBR_GOT_L16_W   22
 115 #define R_C6000_SBR_GOT_H16_W   23
 116 #define R_C6000_DSBT_INDEX      24
 117 #define R_C6000_PREL31          25
 118 #define R_C6000_COPY            26
 119 #define R_C6000_ALIGN           253
 120 #define R_C6000_FPHEAD          254
 121 #define R_C6000_NOCMP           255
 122
 123 #endif /*_ASM_C6X_ELF_H */