arch/c6x/include/asm/elf.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  *  Port on Texas Instruments TMS320C6x architecture
   4  *
   5  *  Copyright (C) 2004, 2009, 2010 Texas Instruments Incorporated
   6  *  Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com)
   7  */
   8 #ifndef _ASM_C6X_ELF_H
   9 #define _ASM_C6X_ELF_H
  10
  11 /*
  12  * ELF register definitions..
  13  */
  14 #include <asm/ptrace.h>
  15
  16 typedef unsigned long elf_greg_t;
  17 typedef unsigned long elf_fpreg_t;
  18
  19 #define ELF_NGREG  58
  20 #define ELF_NFPREG 1
  21
  22 typedef elf_greg_t elf_gregset_t[ELF_NGREG];
  23 typedef elf_fpreg_t elf_fpregset_t[ELF_NFPREG];
  24
  25 /*
  26  * This is used to ensure we don't load something for the wrong architecture.
  27  */
  28 #define elf_check_arch(x) ((x)->e_machine == EM_TI_C6000)
  29
  30 #define elf_check_fdpic(x) (1)
  31 #define elf_check_const_displacement(x) (0)
  32
  33 #define ELF_FDPIC_PLAT_INIT(_regs, _exec_map, _interp_map, _dynamic_addr) \
  34 do {                                                            \
  35         _regs->b4       = (_exec_map);                          \
  36         _regs->a6       = (_interp_map);                        \
  37         _regs->b6       = (_dynamic_addr);                      \
  38 } while (0)
  39
  40 #define ELF_FDPIC_CORE_EFLAGS   0
  41
  42 /*
  43  * These are used to set parameters in the core dumps.
  44  */
  45 #ifdef __LITTLE_ENDIAN__
  46 #define ELF_DATA        ELFDATA2LSB
  47 #else
  48 #define ELF_DATA        ELFDATA2MSB
  49 #endif
  50
  51 #define ELF_CLASS       ELFCLASS32
  52 #define ELF_ARCH        EM_TI_C6000
  53
  54 /* Nothing for now. Need to setup DP... */
  55 #define ELF_PLAT_INIT(_r)
  56
  57 #define ELF_EXEC_PAGESIZE       4096
  58
  59 #define ELF_CORE_COPY_REGS(_dest, _regs)                \
  60         memcpy((char *) &_dest, (char *) _regs,         \
  61         sizeof(struct pt_regs));
  62
  63 /* This yields a mask that user programs can use to figure out what
  64    instruction set this cpu supports.  */
  65
  66 #define ELF_HWCAP       (0)
  67
  68 /* This yields a string that ld.so will use to load implementation
  69    specific libraries for optimization.  This is more specific in
  70    intent than poking at uname or /proc/cpuinfo.  */
  71
  72 #define ELF_PLATFORM  (NULL)
  73
  74 /* C6X specific section types */
  75 #define SHT_C6000_UNWIND        0x70000001
  76 #define SHT_C6000_PREEMPTMAP    0x70000002
  77 #define SHT_C6000_ATTRIBUTES    0x70000003
  78
  79 /* C6X specific DT_ tags */
  80 #define DT_C6000_DSBT_BASE      0x70000000
  81 #define DT_C6000_DSBT_SIZE      0x70000001
  82 #define DT_C6000_PREEMPTMAP     0x70000002
  83 #define DT_C6000_DSBT_INDEX     0x70000003
  84
  85 /* C6X specific relocs */
  86 #define R_C6000_NONE            0
  87 #define R_C6000_ABS32           1
  88 #define R_C6000_ABS16           2
  89 #define R_C6000_ABS8            3
  90 #define R_C6000_PCR_S21         4
  91 #define R_C6000_PCR_S12         5
  92 #define R_C6000_PCR_S10         6
  93 #define R_C6000_PCR_S7          7
  94 #define R_C6000_ABS_S16         8
  95 #define R_C6000_ABS_L16         9
  96 #define R_C6000_ABS_H16         10
  97 #define R_C6000_SBR_U15_B       11
  98 #define R_C6000_SBR_U15_H       12
  99 #define R_C6000_SBR_U15_W       13
 100 #define R_C6000_SBR_S16         14
 101 #define R_C6000_SBR_L16_B       15
 102 #define R_C6000_SBR_L16_H       16
 103 #define R_C6000_SBR_L16_W       17
 104 #define R_C6000_SBR_H16_B       18
 105 #define R_C6000_SBR_H16_H       19
 106 #define R_C6000_SBR_H16_W       20
 107 #define R_C6000_SBR_GOT_U15_W   21
 108 #define R_C6000_SBR_GOT_L16_W   22
 109 #define R_C6000_SBR_GOT_H16_W   23
 110 #define R_C6000_DSBT_INDEX      24
 111 #define R_C6000_PREL31          25
 112 #define R_C6000_COPY            26
 113 #define R_C6000_ALIGN           253
 114 #define R_C6000_FPHEAD          254
 115 #define R_C6000_NOCMP           255
 116
 117 #endif /*_ASM_C6X_ELF_H */