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[/] [or1k/] [trunk/] [insight/] [bfd/] [elf32-m68hc12.c] - Blame information for rev 1776

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1 578 markom
/* Motorola 68HC12-specific support for 32-bit ELF
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   Copyright 1999, 2000 Free Software Foundation, Inc.
3
   Contributed by Stephane Carrez (stcarrez@worldnet.fr)
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   (Heavily copied from the D10V port by Martin Hunt (hunt@cygnus.com))
5
 
6
This file is part of BFD, the Binary File Descriptor library.
7
 
8
This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
12
 
13
This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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GNU General Public License for more details.
17
 
18
You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
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22
#include "bfd.h"
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#include "sysdep.h"
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#include "libbfd.h"
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#include "elf-bfd.h"
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#include "elf/m68hc11.h"
27
 
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static reloc_howto_type *bfd_elf32_bfd_reloc_type_lookup
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PARAMS ((bfd * abfd, bfd_reloc_code_real_type code));
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static void m68hc11_info_to_howto_rel
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PARAMS ((bfd *, arelent *, Elf32_Internal_Rel *));
32
 
33
/* Use REL instead of RELA to save space */
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#define USE_REL
35
 
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/* The Motorola 68HC11 microcontroler only addresses 64Kb.
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   We must handle 8 and 16-bit relocations.  The 32-bit relocation
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   is defined but not used except by gas when -gstabs is used (which
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   is wrong).
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   The 3-bit and 16-bit PC rel relocation is only used by 68HC12.  */
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static reloc_howto_type elf_m68hc11_howto_table[] = {
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  /* This reloc does nothing.  */
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  HOWTO (R_M68HC11_NONE,        /* type */
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         0,                      /* rightshift */
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         2,                     /* size (0 = byte, 1 = short, 2 = long) */
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         32,                    /* bitsize */
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         false,                 /* pc_relative */
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         0,                      /* bitpos */
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         complain_overflow_bitfield,    /* complain_on_overflow */
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         bfd_elf_generic_reloc, /* special_function */
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         "R_M68HC11_NONE",      /* name */
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         false,                 /* partial_inplace */
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         0,                      /* src_mask */
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         0,                      /* dst_mask */
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         false),                /* pcrel_offset */
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57
  /* A 8 bit absolute relocation */
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  HOWTO (R_M68HC11_8,           /* type */
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         0,                      /* rightshift */
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         0,                      /* size (0 = byte, 1 = short, 2 = long) */
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         8,                     /* bitsize */
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         false,                 /* pc_relative */
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         0,                      /* bitpos */
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         complain_overflow_bitfield,    /* complain_on_overflow */
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         bfd_elf_generic_reloc, /* special_function */
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         "R_M68HC11_8",         /* name */
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         false,                 /* partial_inplace */
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         0x00ff,                /* src_mask */
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         0x00ff,                /* dst_mask */
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         false),                /* pcrel_offset */
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72
  /* A 8 bit absolute relocation (upper address) */
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  HOWTO (R_M68HC11_HI8,         /* type */
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         8,                     /* rightshift */
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         0,                      /* size (0 = byte, 1 = short, 2 = long) */
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         8,                     /* bitsize */
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         false,                 /* pc_relative */
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         0,                      /* bitpos */
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         complain_overflow_bitfield,    /* complain_on_overflow */
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         bfd_elf_generic_reloc, /* special_function */
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         "R_M68HC11_HI8",       /* name */
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         false,                 /* partial_inplace */
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         0x00ff,                /* src_mask */
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         0x00ff,                /* dst_mask */
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         false),                /* pcrel_offset */
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87
  /* A 8 bit absolute relocation (upper address) */
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  HOWTO (R_M68HC11_LO8,         /* type */
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         0,                      /* rightshift */
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         0,                      /* size (0 = byte, 1 = short, 2 = long) */
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         8,                     /* bitsize */
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         false,                 /* pc_relative */
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         0,                      /* bitpos */
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         complain_overflow_dont,        /* complain_on_overflow */
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         bfd_elf_generic_reloc, /* special_function */
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         "R_M68HC11_LO8",       /* name */
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         false,                 /* partial_inplace */
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         0x00ff,                /* src_mask */
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         0x00ff,                /* dst_mask */
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         false),                /* pcrel_offset */
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102
  /* A 8 bit PC-rel relocation */
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  HOWTO (R_M68HC11_PCREL_8,     /* type */
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         0,                      /* rightshift */
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         0,                      /* size (0 = byte, 1 = short, 2 = long) */
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         8,                     /* bitsize */
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         true,                  /* pc_relative */
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         0,                      /* bitpos */
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         complain_overflow_bitfield,    /* complain_on_overflow */
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         bfd_elf_generic_reloc, /* special_function */
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         "R_M68HC11_PCREL_8",   /* name */
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         false,                 /* partial_inplace */
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         0x0,                   /* src_mask */
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         0x00ff,                /* dst_mask */
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         false),                /* pcrel_offset */
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117
  /* A 16 bit absolute relocation */
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  HOWTO (R_M68HC11_16,          /* type */
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         0,                      /* rightshift */
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         1,                     /* size (0 = byte, 1 = short, 2 = long) */
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         16,                    /* bitsize */
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         false,                 /* pc_relative */
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         0,                      /* bitpos */
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         complain_overflow_dont /*bitfield */ , /* complain_on_overflow */
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         bfd_elf_generic_reloc, /* special_function */
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         "R_M68HC11_16",        /* name */
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         false,                 /* partial_inplace */
128
         0xffff,                /* src_mask */
129
         0xffff,                /* dst_mask */
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         false),                /* pcrel_offset */
131
 
132
  /* A 32 bit absolute relocation.  This one is never used for the
133
     code relocation.  It's used by gas for -gstabs generation.  */
134
  HOWTO (R_M68HC11_32,          /* type */
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         0,                      /* rightshift */
136
         2,                     /* size (0 = byte, 1 = short, 2 = long) */
137
         32,                    /* bitsize */
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         false,                 /* pc_relative */
139
         0,                      /* bitpos */
140
         complain_overflow_bitfield,    /* complain_on_overflow */
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         bfd_elf_generic_reloc, /* special_function */
142
         "R_M68HC11_32",        /* name */
143
         false,                 /* partial_inplace */
144
         0xffffffff,            /* src_mask */
145
         0xffffffff,            /* dst_mask */
146
         false),                /* pcrel_offset */
147
 
148
  /* A 3 bit absolute relocation */
149
  HOWTO (R_M68HC11_3B,          /* type */
150
         0,                      /* rightshift */
151
         0,                      /* size (0 = byte, 1 = short, 2 = long) */
152
         3,                     /* bitsize */
153
         false,                 /* pc_relative */
154
         0,                      /* bitpos */
155
         complain_overflow_bitfield,    /* complain_on_overflow */
156
         bfd_elf_generic_reloc, /* special_function */
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         "R_M68HC11_4B",        /* name */
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         false,                 /* partial_inplace */
159
         0x003,                 /* src_mask */
160
         0x003,                 /* dst_mask */
161
         false),                /* pcrel_offset */
162
 
163
  /* A 16 bit PC-rel relocation */
164
  HOWTO (R_M68HC11_PCREL_16,    /* type */
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         0,                      /* rightshift */
166
         1,                     /* size (0 = byte, 1 = short, 2 = long) */
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         16,                    /* bitsize */
168
         true,                  /* pc_relative */
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         0,                      /* bitpos */
170
         complain_overflow_dont,        /* complain_on_overflow */
171
         bfd_elf_generic_reloc, /* special_function */
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         "R_M68HC11_PCREL_16",  /* name */
173
         false,                 /* partial_inplace */
174
         0x0,                   /* src_mask */
175
         0xffff,                /* dst_mask */
176
         false),                /* pcrel_offset */
177
 
178
  /* GNU extension to record C++ vtable hierarchy */
179
  HOWTO (R_M68HC11_GNU_VTINHERIT,       /* type */
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         0,                      /* rightshift */
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         1,                     /* size (0 = byte, 1 = short, 2 = long) */
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         0,                      /* bitsize */
183
         false,                 /* pc_relative */
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         0,                      /* bitpos */
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         complain_overflow_dont,        /* complain_on_overflow */
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         NULL,                  /* special_function */
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         "R_M68HC11_GNU_VTINHERIT",     /* name */
188
         false,                 /* partial_inplace */
189
         0,                      /* src_mask */
190
         0,                      /* dst_mask */
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         false),                /* pcrel_offset */
192
 
193
  /* GNU extension to record C++ vtable member usage */
194
  HOWTO (R_M68HC11_GNU_VTENTRY, /* type */
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         0,                      /* rightshift */
196
         1,                     /* size (0 = byte, 1 = short, 2 = long) */
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         0,                      /* bitsize */
198
         false,                 /* pc_relative */
199
         0,                      /* bitpos */
200
         complain_overflow_dont,        /* complain_on_overflow */
201
         _bfd_elf_rel_vtable_reloc_fn,  /* special_function */
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         "R_M68HC11_GNU_VTENTRY",       /* name */
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         false,                 /* partial_inplace */
204
         0,                      /* src_mask */
205
         0,                      /* dst_mask */
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         false),                /* pcrel_offset */
207
};
208
 
209
/* Map BFD reloc types to M68HC11 ELF reloc types.  */
210
 
211
struct m68hc11_reloc_map
212
{
213
  bfd_reloc_code_real_type bfd_reloc_val;
214
  unsigned char elf_reloc_val;
215
};
216
 
217
static const struct m68hc11_reloc_map m68hc11_reloc_map[] = {
218
  {BFD_RELOC_NONE, R_M68HC11_NONE,},
219
  {BFD_RELOC_8, R_M68HC11_8},
220
  {BFD_RELOC_M68HC11_HI8, R_M68HC11_HI8},
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  {BFD_RELOC_M68HC11_LO8, R_M68HC11_LO8},
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  {BFD_RELOC_8_PCREL, R_M68HC11_PCREL_8},
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  {BFD_RELOC_16_PCREL, R_M68HC11_PCREL_16},
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  {BFD_RELOC_16, R_M68HC11_16},
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  {BFD_RELOC_32, R_M68HC11_32},
226
  {BFD_RELOC_M68HC11_3B, R_M68HC11_3B},
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228
  /* The following relocs are defined but they probably don't work yet.  */
229
  {BFD_RELOC_VTABLE_INHERIT, R_M68HC11_GNU_VTINHERIT},
230
  {BFD_RELOC_VTABLE_ENTRY, R_M68HC11_GNU_VTENTRY},
231
};
232
 
233
static reloc_howto_type *
234
bfd_elf32_bfd_reloc_type_lookup (abfd, code)
235
     bfd *abfd ATTRIBUTE_UNUSED;
236
     bfd_reloc_code_real_type code;
237
{
238
  unsigned int i;
239
 
240
  for (i = 0;
241
       i < sizeof (m68hc11_reloc_map) / sizeof (struct m68hc11_reloc_map);
242
       i++)
243
    {
244
      if (m68hc11_reloc_map[i].bfd_reloc_val == code)
245
        return &elf_m68hc11_howto_table[m68hc11_reloc_map[i].elf_reloc_val];
246
    }
247
 
248
  return NULL;
249
}
250
 
251
/* Set the howto pointer for an M68HC11 ELF reloc.  */
252
 
253
static void
254
m68hc11_info_to_howto_rel (abfd, cache_ptr, dst)
255
     bfd *abfd ATTRIBUTE_UNUSED;
256
     arelent *cache_ptr;
257
     Elf32_Internal_Rel *dst;
258
{
259
  unsigned int r_type;
260
 
261
  r_type = ELF32_R_TYPE (dst->r_info);
262
  BFD_ASSERT (r_type < (unsigned int) R_M68HC11_max);
263
  cache_ptr->howto = &elf_m68hc11_howto_table[r_type];
264
}
265
 
266
/* Below is the only difference between elf32-m68hc12.c and elf32-m68hc11.c.
267
   The Motorola spec says to use a different Elf machine code.  */
268
#define ELF_ARCH                bfd_arch_m68hc12
269
#define ELF_MACHINE_CODE        EM_68HC12
270
#define ELF_MAXPAGESIZE         0x1000
271
 
272
#define TARGET_BIG_SYM          bfd_elf32_m68hc12_vec
273
#define TARGET_BIG_NAME         "elf32-m68hc12"
274
 
275
#define elf_info_to_howto       0
276
#define elf_info_to_howto_rel   m68hc11_info_to_howto_rel
277
#define elf_backend_object_p    0
278
#define elf_backend_final_write_processing      0
279
 
280
#include "elf32-target.h"

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