bfd/elf32-d10v.c

   1 /* D10V-specific support for 32-bit ELF
   2    Copyright (C) 1996 Free Software Foundation, Inc.
   3    Contributed by Martin Hunt (hunt@cygnus.com).
   4
   5 This file is part of BFD, the Binary File Descriptor library.
   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 as published by
   9 the Free Software Foundation; either version 2 of the License, or
  10 (at your option) any later version.
  11
  12 This program is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with this program; if not, write to the Free Software
  19 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  20
  21 #include "bfd.h"
  22 #include "sysdep.h"
  23 #include "libbfd.h"
  24 #include "elf-bfd.h"
  25 /* #include "elf/d10v.h" */
  26
  27 static reloc_howto_type *bfd_elf32_bfd_reloc_type_lookup
  28   PARAMS ((bfd *abfd, bfd_reloc_code_real_type code));
  29 static void d10v_info_to_howto_rel
  30   PARAMS ((bfd *, arelent *, Elf32_Internal_Rel *));
  31
  32
  33 /* Use REL instead of RELA to save space */
  34 #define USE_REL
  35
  36 enum reloc_type
  37 {
  38   R_D10V_NONE = 0,
  39   R_D10V_10_PCREL_R,
  40   R_D10V_10_PCREL_L,
  41   R_D10V_16,
  42   R_D10V_18,
  43   R_D10V_18_PCREL,
  44   R_D10V_max
  45 };
  46
  47 static reloc_howto_type elf_d10v_howto_table[] =
  48 {
  49   /* This reloc does nothing.  */
  50   HOWTO (R_D10V_NONE,           /* type */
  51          0,                     /* rightshift */
  52          2,                     /* size (0 = byte, 1 = short, 2 = long) */
  53          32,                    /* bitsize */
  54          false,                 /* pc_relative */
  55          0,                     /* bitpos */
  56          complain_overflow_bitfield, /* complain_on_overflow */
  57          bfd_elf_generic_reloc, /* special_function */
  58          "R_D10V_NONE",         /* name */
  59          false,                 /* partial_inplace */
  60          0,                     /* src_mask */
  61          0,                     /* dst_mask */
  62          false),                /* pcrel_offset */
  63
  64   /* An PC Relative 10-bit relocation, shifted by 2  */
  65   /* right container */
  66   HOWTO (R_D10V_10_PCREL_R,     /* type */
  67          2,                     /* rightshift */
  68          2,                     /* size (0 = byte, 1 = short, 2 = long) */
  69          10,                    /* bitsize */
  70          true,                  /* pc_relative */
  71          0,                     /* bitpos */
  72          complain_overflow_bitfield, /* complain_on_overflow */
  73          bfd_elf_generic_reloc, /* special_function */
  74          "R_D10V_10_PCREL_R",   /* name */
  75          false,                 /* partial_inplace */
  76          0xff,                  /* src_mask */
  77          0xff,                  /* dst_mask */
  78          true),                 /* pcrel_offset */
  79
  80   /* An PC Relative 10-bit relocation, shifted by 2  */
  81   /* left container */
  82   HOWTO (R_D10V_10_PCREL_L,     /* type */
  83          2,                     /* rightshift */
  84          2,                     /* size (0 = byte, 1 = short, 2 = long) */
  85          10,                    /* bitsize */
  86          true,                  /* pc_relative */
  87          15,                    /* bitpos */
  88          complain_overflow_bitfield, /* complain_on_overflow */
  89          bfd_elf_generic_reloc, /* special_function */
  90          "R_D10V_10_PCREL_L",   /* name */
  91          false,                 /* partial_inplace */
  92          0x07f8000,                     /* src_mask */
  93          0x07f8000,             /* dst_mask */
  94          true),                 /* pcrel_offset */
  95
  96   /* A 16 bit absolute relocation */
  97   HOWTO (R_D10V_16,             /* type */
  98          0,                     /* rightshift */
  99          2,                     /* size (0 = byte, 1 = short, 2 = long) */
 100          16,                    /* bitsize */
 101          false,                 /* pc_relative */
 102          0,                     /* bitpos */
 103          complain_overflow_bitfield, /* complain_on_overflow */
 104          bfd_elf_generic_reloc, /* special_function */
 105          "R_D10V_16",           /* name */
 106          false,                 /* partial_inplace */
 107          0xffff,                /* src_mask */
 108          0xffff,                /* dst_mask */
 109          false),                /* pcrel_offset */
 110
 111   /* An 18 bit absolute relocation, right shifted 2 */
 112   HOWTO (R_D10V_18,             /* type */
 113          2,                     /* rightshift */
 114          2,                     /* size (0 = byte, 1 = short, 2 = long) */
 115          18,                    /* bitsize */
 116          false,                 /* pc_relative */
 117          0,                     /* bitpos */
 118          complain_overflow_bitfield, /* complain_on_overflow */
 119          bfd_elf_generic_reloc, /* special_function */
 120          "R_D10V_18",           /* name */
 121          false,                 /* partial_inplace */
 122          0xffff,                /* src_mask */
 123          0xffff,                /* dst_mask */
 124          false),                /* pcrel_offset */
 125
 126   /* A relative 18 bit relocation, right shifted by 2  */
 127   HOWTO (R_D10V_18_PCREL,       /* type */
 128          2,                     /* rightshift */
 129          2,                     /* size (0 = byte, 1 = short, 2 = long) */
 130          18,                    /* bitsize */
 131          true,                  /* pc_relative */
 132          0,                     /* bitpos */
 133          complain_overflow_signed, /* complain_on_overflow */
 134          bfd_elf_generic_reloc, /* special_function */
 135          "R_D10V_18_PCREL",     /* name */
 136          false,                 /* partial_inplace */
 137          0xffff,                /* src_mask */
 138          0xffff,                /* dst_mask */
 139          true),                 /* pcrel_offset */
 140
 141 };
 142
 143 /* Map BFD reloc types to D10V ELF reloc types.  */
 144
 145 struct d10v_reloc_map
 146 {
 147   unsigned char bfd_reloc_val;
 148   unsigned char elf_reloc_val;
 149 };
 150
 151  static const struct d10v_reloc_map d10v_reloc_map[] =
 152 {
 153   { BFD_RELOC_NONE, R_D10V_NONE, },
 154   { BFD_RELOC_D10V_10_PCREL_R, R_D10V_10_PCREL_R },
 155   { BFD_RELOC_D10V_10_PCREL_L, R_D10V_10_PCREL_L },
 156   { BFD_RELOC_16, R_D10V_16 },
 157   { BFD_RELOC_D10V_18, R_D10V_18 },
 158   { BFD_RELOC_D10V_18_PCREL, R_D10V_18_PCREL },
 159 };
 160
 161 static reloc_howto_type *
 162 bfd_elf32_bfd_reloc_type_lookup (abfd, code)
 163      bfd *abfd;
 164      bfd_reloc_code_real_type code;
 165 {
 166   unsigned int i;
 167
 168   for (i = 0;
 169        i < sizeof (d10v_reloc_map) / sizeof (struct d10v_reloc_map);
 170        i++)
 171     {
 172       if (d10v_reloc_map[i].bfd_reloc_val == code)
 173         return &elf_d10v_howto_table[d10v_reloc_map[i].elf_reloc_val];
 174     }
 175
 176   return NULL;
 177 }
 178
 179 /* Set the howto pointer for an D10V ELF reloc.  */
 180
 181 static void
 182 d10v_info_to_howto_rel (abfd, cache_ptr, dst)
 183      bfd *abfd;
 184      arelent *cache_ptr;
 185      Elf32_Internal_Rel *dst;
 186 {
 187   unsigned int r_type;
 188
 189   r_type = ELF32_R_TYPE (dst->r_info);
 190   BFD_ASSERT (r_type < (unsigned int) R_D10V_max);
 191   cache_ptr->howto = &elf_d10v_howto_table[r_type];
 192 }
 193
 194 #define ELF_ARCH                bfd_arch_d10v
 195 #define ELF_MACHINE_CODE        EM_CYGNUS_D10V
 196 #define ELF_MAXPAGESIZE         0x1000
 197
 198 #define TARGET_BIG_SYM          bfd_elf32_d10v_vec
 199 #define TARGET_BIG_NAME         "elf32-d10v"
 200
 201 #define elf_info_to_howto       0
 202 #define elf_info_to_howto_rel   d10v_info_to_howto_rel
 203 #define elf_backend_object_p    0
 204 #define elf_backend_final_write_processing      0
 205
 206 #include "elf32-target.h"