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[/] [openrisc/] [trunk/] [gnu-src/] [gdb-6.8/] [bfd/] [coff-z80.c] - Blame information for rev 157

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1 24 jeremybenn
/* BFD back-end for Zilog Z80 COFF binaries.
2
   Copyright 2005, 2007 Free Software Foundation, Inc.
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   Contributed by Arnold Metselaar <arnold_m@operamail.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
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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 3 of the License, or
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   (at your option) any later version.
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12
   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.
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17
   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., 51 Franklin Street - Fifth Floor, Boston,
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   MA 02110-1301, USA.  */
21
 
22
#include "sysdep.h"
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#include "bfd.h"
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#include "libbfd.h"
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#include "bfdlink.h"
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#include "coff/z80.h"
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#include "coff/internal.h"
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#include "libcoff.h"
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30
#define COFF_DEFAULT_SECTION_ALIGNMENT_POWER 0
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32
static reloc_howto_type r_imm32 =
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HOWTO (R_IMM32, 0, 1, 32, FALSE, 0,
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       complain_overflow_dont, 0, "r_imm32", TRUE, 0xffffffff, 0xffffffff,
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       FALSE);
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static reloc_howto_type r_imm24 =
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HOWTO (R_IMM24, 0, 1, 24, FALSE, 0,
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       complain_overflow_dont, 0, "r_imm24", TRUE, 0x00ffffff, 0x00ffffff,
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       FALSE);
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static reloc_howto_type r_imm16 =
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HOWTO (R_IMM16, 0, 1, 16, FALSE, 0,
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       complain_overflow_dont, 0, "r_imm16", TRUE, 0x0000ffff, 0x0000ffff,
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       FALSE);
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static reloc_howto_type r_imm8 =
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HOWTO (R_IMM8, 0, 0, 8, FALSE, 0,
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       complain_overflow_bitfield, 0, "r_imm8", TRUE, 0x000000ff, 0x000000ff,
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       FALSE);
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52
static reloc_howto_type r_jr =
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HOWTO (R_JR, 0, 0, 8, TRUE, 0,
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       complain_overflow_signed, 0, "r_jr", FALSE, 0, 0xFF,
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       FALSE);
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static reloc_howto_type r_off8 =
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HOWTO (R_OFF8, 0, 0, 8, FALSE, 0,
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       complain_overflow_signed, 0,"r_off8", FALSE, 0, 0xff,
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       FALSE);
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62
 
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#define BADMAG(x) Z80BADMAG(x)
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#define Z80 1                   /* Customize coffcode.h.  */
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#define __A_MAGIC_SET__
66
 
67
/* Code to swap in the reloc.  */
68
 
69
#define SWAP_IN_RELOC_OFFSET    H_GET_32
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#define SWAP_OUT_RELOC_OFFSET   H_PUT_32
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72
#define SWAP_OUT_RELOC_EXTRA(abfd, src, dst) \
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  dst->r_stuff[0] = 'S'; \
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  dst->r_stuff[1] = 'C';
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76
/* Code to turn a r_type into a howto ptr, uses the above howto table.  */
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78
static void
79
rtype2howto (arelent *internal, struct internal_reloc *dst)
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{
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  switch (dst->r_type)
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    {
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    default:
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      abort ();
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      break;
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    case R_IMM8:
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      internal->howto = &r_imm8;
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      break;
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    case R_IMM16:
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      internal->howto = &r_imm16;
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      break;
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    case R_IMM24:
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      internal->howto = &r_imm24;
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      break;
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    case R_IMM32:
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      internal->howto = &r_imm32;
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      break;
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    case R_JR:
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      internal->howto = &r_jr;
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      break;
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    case R_OFF8:
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      internal->howto = &r_off8;
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      break;
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    }
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}
106
 
107
#define RTYPE2HOWTO(internal, relocentry) rtype2howto (internal, relocentry)
108
 
109
static reloc_howto_type *
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coff_z80_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
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                            bfd_reloc_code_real_type code)
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{
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  switch (code)
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    {
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    case BFD_RELOC_8:           return & r_imm8;
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    case BFD_RELOC_16:          return & r_imm16;
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    case BFD_RELOC_24:          return & r_imm24;
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    case BFD_RELOC_32:          return & r_imm32;
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    case BFD_RELOC_8_PCREL:     return & r_jr;
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    case BFD_RELOC_Z80_DISP8:   return & r_off8;
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    default:                    BFD_FAIL ();
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      return NULL;
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    }
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}
125
 
126
static reloc_howto_type *
127
coff_z80_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
128
                            const char *r_name)
129
{
130
  if (strcasecmp (r_imm8.name, r_name) == 0)
131
    return &r_imm8;
132
  if (strcasecmp (r_imm16.name, r_name) == 0)
133
    return &r_imm16;
134
  if (strcasecmp (r_imm24.name, r_name) == 0)
135
    return &r_imm24;
136
  if (strcasecmp (r_imm32.name, r_name) == 0)
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    return &r_imm32;
138
  if (strcasecmp (r_jr.name, r_name) == 0)
139
    return &r_jr;
140
  if (strcasecmp (r_off8.name, r_name) == 0)
141
    return &r_off8;
142
 
143
  return NULL;
144
}
145
 
146
/* Perform any necessary magic to the addend in a reloc entry.  */
147
 
148
#define CALC_ADDEND(abfd, symbol, ext_reloc, cache_ptr) \
149
 cache_ptr->addend =  ext_reloc.r_offset;
150
 
151
#define RELOC_PROCESSING(relent,reloc,symbols,abfd,section) \
152
 reloc_processing(relent, reloc, symbols, abfd, section)
153
 
154
static void
155
reloc_processing (arelent *relent,
156
                  struct internal_reloc *reloc,
157
                  asymbol **symbols,
158
                  bfd *abfd,
159
                  asection *section)
160
{
161
  relent->address = reloc->r_vaddr;
162
  rtype2howto (relent, reloc);
163
 
164
  if (reloc->r_symndx > 0)
165
    relent->sym_ptr_ptr = symbols + obj_convert (abfd)[reloc->r_symndx];
166
  else
167
    relent->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;
168
 
169
  relent->addend = reloc->r_offset;
170
  relent->address -= section->vma;
171
}
172
 
173
static void
174
extra_case (bfd *in_abfd,
175
            struct bfd_link_info *link_info,
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            struct bfd_link_order *link_order,
177
            arelent *reloc,
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            bfd_byte *data,
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            unsigned int *src_ptr,
180
            unsigned int *dst_ptr)
181
{
182
  asection * input_section = link_order->u.indirect.section;
183
  int val;
184
 
185
  switch (reloc->howto->type)
186
    {
187
    case R_OFF8:
188
        val = bfd_coff_reloc16_get_value (reloc, link_info,
189
                                           input_section);
190
        if (val>127 || val<-128) /* Test for overflow.  */
191
          {
192
            if (! ((*link_info->callbacks->reloc_overflow)
193
                   (link_info, NULL,
194
                    bfd_asymbol_name (*reloc->sym_ptr_ptr),
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                    reloc->howto->name, reloc->addend, input_section->owner,
196
                    input_section, reloc->address)))
197
              abort ();
198
          }
199
        bfd_put_8 (in_abfd, val, data + *dst_ptr);
200
        (*dst_ptr) += 1;
201
        (*src_ptr) += 1;
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      break;
203
 
204
    case R_IMM8:
205
      val = bfd_get_8 ( in_abfd, data+*src_ptr)
206
        + bfd_coff_reloc16_get_value (reloc, link_info, input_section);
207
      bfd_put_8 (in_abfd, val, data + *dst_ptr);
208
      (*dst_ptr) += 1;
209
      (*src_ptr) += 1;
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      break;
211
 
212
    case R_IMM16:
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      val = bfd_get_16 ( in_abfd, data+*src_ptr)
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        + bfd_coff_reloc16_get_value (reloc, link_info, input_section);
215
      bfd_put_16 (in_abfd, val, data + *dst_ptr);
216
      (*dst_ptr) += 2;
217
      (*src_ptr) += 2;
218
      break;
219
 
220
    case R_IMM24:
221
      val = bfd_get_16 ( in_abfd, data+*src_ptr)
222
        + (bfd_get_8 ( in_abfd, data+*src_ptr+2) << 16)
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        + bfd_coff_reloc16_get_value (reloc, link_info, input_section);
224
      bfd_put_16 (in_abfd, val, data + *dst_ptr);
225
      bfd_put_8 (in_abfd, val >> 16, data + *dst_ptr+2);
226
      (*dst_ptr) += 3;
227
      (*src_ptr) += 3;
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      break;
229
 
230
    case R_IMM32:
231
      val = bfd_get_32 ( in_abfd, data+*src_ptr)
232
        + bfd_coff_reloc16_get_value (reloc, link_info, input_section);
233
      bfd_put_32 (in_abfd, val, data + *dst_ptr);
234
      (*dst_ptr) += 4;
235
      (*src_ptr) += 4;
236
      break;
237
 
238
    case R_JR:
239
      {
240
        bfd_vma dst = bfd_coff_reloc16_get_value (reloc, link_info,
241
                                                  input_section);
242
        bfd_vma dot = (*dst_ptr
243
                       + input_section->output_offset
244
                       + input_section->output_section->vma);
245
        int gap = dst - dot - 1;  /* -1, Since the offset is relative
246
                                     to the value of PC after reading
247
                                     the offset.  */
248
 
249
        if (gap >= 128 || gap < -128)
250
          {
251
            if (! ((*link_info->callbacks->reloc_overflow)
252
                   (link_info, NULL,
253
                    bfd_asymbol_name (*reloc->sym_ptr_ptr),
254
                    reloc->howto->name, reloc->addend, input_section->owner,
255
                    input_section, reloc->address)))
256
              abort ();
257
          }
258
        bfd_put_8 (in_abfd, gap, data + *dst_ptr);
259
        (*dst_ptr)++;
260
        (*src_ptr)++;
261
        break;
262
      }
263
 
264
    default:
265
      abort ();
266
    }
267
}
268
 
269
#define coff_reloc16_extra_cases    extra_case
270
#define coff_bfd_reloc_type_lookup  coff_z80_reloc_type_lookup
271
#define coff_bfd_reloc_name_lookup coff_z80_reloc_name_lookup
272
 
273
#include "coffcode.h"
274
 
275
#undef  coff_bfd_get_relocated_section_contents
276
#define coff_bfd_get_relocated_section_contents \
277
  bfd_coff_reloc16_get_relocated_section_contents
278
 
279
#undef  coff_bfd_relax_section
280
#define coff_bfd_relax_section bfd_coff_reloc16_relax_section
281
 
282
CREATE_LITTLE_COFF_TARGET_VEC (z80coff_vec, "coff-z80", 0, 0, '\0', NULL,
283
                               COFF_SWAP_TABLE)
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