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[/] [openrisc/] [trunk/] [gnu-src/] [gdb-6.8/] [bfd/] [coff-tic4x.c] - Blame information for rev 225

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1 24 jeremybenn
/* BFD back-end for TMS320C4X coff binaries.
2 225 jeremybenn
   Copyright 1996, 1997, 1998, 1999, 2000, 2002, 2003, 2005, 2007,
3
   2008  Free Software Foundation, Inc.
4 24 jeremybenn
 
5
   Contributed by Michael Hayes (m.hayes@elec.canterbury.ac.nz)
6
 
7
   This file is part of BFD, the Binary File Descriptor library.
8
 
9
   This program is free software; you can redistribute it and/or modify
10
   it under the terms of the GNU General Public License as published by
11
   the Free Software Foundation; either version 3 of the License, or
12
   (at your option) any later version.
13
 
14
   This program is distributed in the hope that it will be useful,
15
   but WITHOUT ANY WARRANTY; without even the implied warranty of
16
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17
   GNU General Public License for more details.
18
 
19
   You should have received a copy of the GNU General Public License
20
   along with this program; if not, write to the Free Software
21
   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
22
   02110-1301, USA.  */
23
 
24
#include "sysdep.h"
25
#include "bfd.h"
26
#include "libbfd.h"
27
#include "bfdlink.h"
28
#include "coff/tic4x.h"
29
#include "coff/internal.h"
30
#include "libcoff.h"
31
 
32
#undef  F_LSYMS
33
#define F_LSYMS         F_LSYMS_TICOFF
34
 
35
static bfd_boolean ticoff_bfd_is_local_label_name
36
    PARAMS ((bfd *, const char *));
37
static bfd_reloc_status_type tic4x_relocation
38
    PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char ** ));
39
static reloc_howto_type *tic4x_coff_reloc_type_lookup
40
    PARAMS ((bfd *, bfd_reloc_code_real_type ));
41
static void tic4x_lookup_howto
42
    PARAMS ((arelent *, struct internal_reloc * ));
43
static reloc_howto_type *coff_tic4x_rtype_to_howto
44
    PARAMS ((bfd *, asection *, struct internal_reloc *, struct coff_link_hash_entry *, struct internal_syment *, bfd_vma * ));
45
static void tic4x_reloc_processing
46
    PARAMS ((arelent *, struct internal_reloc *, asymbol **, bfd *, asection * ));
47
 
48
 
49
/* Replace the stock _bfd_coff_is_local_label_name to recognize TI COFF local
50
   labels.  */
51
static bfd_boolean
52
ticoff_bfd_is_local_label_name (abfd, name)
53
  bfd *abfd ATTRIBUTE_UNUSED;
54
  const char *name;
55
{
56
  if (TICOFF_LOCAL_LABEL_P(name))
57
    return TRUE;
58
  return FALSE;
59
}
60
 
61
#define coff_bfd_is_local_label_name ticoff_bfd_is_local_label_name
62
 
63
#define RELOC_PROCESSING(RELENT,RELOC,SYMS,ABFD,SECT)\
64
 tic4x_reloc_processing (RELENT,RELOC,SYMS,ABFD,SECT)
65
 
66
/* Customize coffcode.h; the default coff_ functions are set up to use
67
   COFF2; coff_bad_format_hook uses BADMAG, so set that for COFF2.
68
   The COFF1 and COFF0 vectors use custom _bad_format_hook procs
69
   instead of setting BADMAG.  */
70
#define BADMAG(x) COFF2_BADMAG(x)
71
 
72 225 jeremybenn
#undef  coff_rtype_to_howto
73
#define coff_rtype_to_howto     coff_tic4x_rtype_to_howto
74 24 jeremybenn
 
75 225 jeremybenn
#ifndef bfd_pe_print_pdata
76
#define bfd_pe_print_pdata      NULL
77
#endif
78
 
79 24 jeremybenn
#include "coffcode.h"
80
 
81
static bfd_reloc_status_type
82
tic4x_relocation (abfd, reloc_entry, symbol, data, input_section,
83
                  output_bfd, error_message)
84
  bfd *abfd ATTRIBUTE_UNUSED;
85
  arelent *reloc_entry;
86
  asymbol *symbol ATTRIBUTE_UNUSED;
87
  PTR data ATTRIBUTE_UNUSED;
88
  asection *input_section;
89
  bfd *output_bfd;
90
  char **error_message ATTRIBUTE_UNUSED;
91
{
92
  if (output_bfd != (bfd *) NULL)
93
    {
94
      /* This is a partial relocation, and we want to apply the
95
         relocation to the reloc entry rather than the raw data.
96
         Modify the reloc inplace to reflect what we now know.  */
97
      reloc_entry->address += input_section->output_offset;
98
      return bfd_reloc_ok;
99
    }
100
  return bfd_reloc_continue;
101
}
102
 
103
reloc_howto_type tic4x_howto_table[] =
104
{
105
    HOWTO(R_RELWORD,     0,  2, 16, FALSE, 0, complain_overflow_signed,   tic4x_relocation, "RELWORD",   TRUE, 0x0000ffff, 0x0000ffff, FALSE),
106
    HOWTO(R_REL24,       0,  2, 24, FALSE, 0, complain_overflow_bitfield, tic4x_relocation, "REL24",     TRUE, 0x00ffffff, 0x00ffffff, FALSE),
107
    HOWTO(R_RELLONG,     0,  2, 32, FALSE, 0, complain_overflow_dont,     tic4x_relocation, "RELLONG",   TRUE, 0xffffffff, 0xffffffff, FALSE),
108
    HOWTO(R_PCRWORD,     0,  2, 16, TRUE,  0, complain_overflow_signed,   tic4x_relocation, "PCRWORD",   TRUE, 0x0000ffff, 0x0000ffff, FALSE),
109
    HOWTO(R_PCR24,       0,  2, 24, TRUE,  0, complain_overflow_signed,   tic4x_relocation, "PCR24",     TRUE, 0x00ffffff, 0x00ffffff, FALSE),
110
    HOWTO(R_PARTLS16,    0,  2, 16, FALSE, 0, complain_overflow_dont,     tic4x_relocation, "PARTLS16",  TRUE, 0x0000ffff, 0x0000ffff, FALSE),
111
    HOWTO(R_PARTMS8,    16,  2, 16, FALSE, 0, complain_overflow_dont,     tic4x_relocation, "PARTMS8",   TRUE, 0x0000ffff, 0x0000ffff, FALSE),
112
    HOWTO(R_RELWORD,     0,  2, 16, FALSE, 0, complain_overflow_signed,   tic4x_relocation, "ARELWORD",  TRUE, 0x0000ffff, 0x0000ffff, FALSE),
113
    HOWTO(R_REL24,       0,  2, 24, FALSE, 0, complain_overflow_signed,   tic4x_relocation, "AREL24",    TRUE, 0x00ffffff, 0x00ffffff, FALSE),
114
    HOWTO(R_RELLONG,     0,  2, 32, FALSE, 0, complain_overflow_signed,   tic4x_relocation, "ARELLONG",  TRUE, 0xffffffff, 0xffffffff, FALSE),
115
    HOWTO(R_PCRWORD,     0,  2, 16, TRUE,  0, complain_overflow_signed,   tic4x_relocation, "APCRWORD",  TRUE, 0x0000ffff, 0x0000ffff, FALSE),
116
    HOWTO(R_PCR24,       0,  2, 24, TRUE,  0, complain_overflow_signed,   tic4x_relocation, "APCR24",    TRUE, 0x00ffffff, 0x00ffffff, FALSE),
117
    HOWTO(R_PARTLS16,    0,  2, 16, FALSE, 0, complain_overflow_dont,     tic4x_relocation, "APARTLS16", TRUE, 0x0000ffff, 0x0000ffff, FALSE),
118
    HOWTO(R_PARTMS8,    16,  2, 16, FALSE, 0, complain_overflow_dont,     tic4x_relocation, "APARTMS8",  TRUE, 0x0000ffff, 0x0000ffff, FALSE),
119
};
120
#define HOWTO_SIZE (sizeof(tic4x_howto_table) / sizeof(tic4x_howto_table[0]))
121
 
122
#undef coff_bfd_reloc_type_lookup
123
#define coff_bfd_reloc_type_lookup tic4x_coff_reloc_type_lookup
124
#undef coff_bfd_reloc_name_lookup
125
#define coff_bfd_reloc_name_lookup tic4x_coff_reloc_name_lookup
126
 
127
/* For the case statement use the code values used tc_gen_reloc (defined in
128
   bfd/reloc.c) to map to the howto table entries.  */
129
 
130
static reloc_howto_type *
131
tic4x_coff_reloc_type_lookup (abfd, code)
132
    bfd *abfd ATTRIBUTE_UNUSED;
133
    bfd_reloc_code_real_type code;
134
{
135
  unsigned int type;
136
  unsigned int i;
137
 
138
  switch (code)
139
    {
140
    case BFD_RELOC_32:          type = R_RELLONG; break;
141
    case BFD_RELOC_24:          type = R_REL24; break;
142
    case BFD_RELOC_16:          type = R_RELWORD; break;
143
    case BFD_RELOC_24_PCREL:    type = R_PCR24; break;
144
    case BFD_RELOC_16_PCREL:    type = R_PCRWORD; break;
145
    case BFD_RELOC_HI16:        type = R_PARTMS8; break;
146
    case BFD_RELOC_LO16:        type = R_PARTLS16; break;
147
    default:
148
      return NULL;
149
    }
150
 
151
  for (i = 0; i < HOWTO_SIZE; i++)
152
    {
153
      if (tic4x_howto_table[i].type == type)
154
        return tic4x_howto_table + i;
155
    }
156
  return NULL;
157
}
158
 
159
static reloc_howto_type *
160
tic4x_coff_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
161
                              const char *r_name)
162
{
163
  unsigned int i;
164
 
165
  for (i = 0;
166
       i < sizeof (tic4x_howto_table) / sizeof (tic4x_howto_table[0]);
167
       i++)
168
    if (tic4x_howto_table[i].name != NULL
169
        && strcasecmp (tic4x_howto_table[i].name, r_name) == 0)
170
      return &tic4x_howto_table[i];
171
 
172
  return NULL;
173
}
174
 
175
/* Code to turn a r_type into a howto ptr, uses the above howto table.
176
   Called after some initial checking by the tic4x_rtype_to_howto fn
177
   below.  */
178
static void
179
tic4x_lookup_howto (internal, dst)
180
     arelent *internal;
181
     struct internal_reloc *dst;
182
{
183
  unsigned int i;
184
  int bank = (dst->r_symndx == -1) ? HOWTO_BANK : 0;
185
 
186
  for (i = 0; i < HOWTO_SIZE; i++)
187
    {
188
      if (tic4x_howto_table[i].type == dst->r_type)
189
        {
190
          internal->howto = tic4x_howto_table + i + bank;
191
          return;
192
        }
193
    }
194
 
195
  (*_bfd_error_handler) (_("Unrecognized reloc type 0x%x"),
196
                         (unsigned int) dst->r_type);
197
  abort();
198
}
199
 
200
static reloc_howto_type *
201
coff_tic4x_rtype_to_howto (abfd, sec, rel, h, sym, addendp)
202
     bfd *abfd ATTRIBUTE_UNUSED;
203
     asection *sec;
204
     struct internal_reloc *rel;
205
     struct coff_link_hash_entry *h ATTRIBUTE_UNUSED;
206
     struct internal_syment *sym ATTRIBUTE_UNUSED;
207
     bfd_vma *addendp;
208
{
209
  arelent genrel;
210
 
211
  if (rel->r_symndx == -1 && addendp != NULL)
212
    /* This is a TI "internal relocation", which means that the relocation
213
       amount is the amount by which the current section is being relocated
214
       in the output section.  */
215
    *addendp = (sec->output_section->vma + sec->output_offset) - sec->vma;
216
 
217
  tic4x_lookup_howto (&genrel, rel);
218
 
219
  return genrel.howto;
220
}
221
 
222
 
223
static void
224
tic4x_reloc_processing (relent, reloc, symbols, abfd, section)
225
     arelent *relent;
226
     struct internal_reloc *reloc;
227
     asymbol **symbols;
228
     bfd *abfd;
229
     asection *section;
230
{
231
  asymbol *ptr;
232
 
233
  relent->address = reloc->r_vaddr;
234
 
235
  if (reloc->r_symndx != -1)
236
    {
237
      if (reloc->r_symndx < 0 || reloc->r_symndx >= obj_conv_table_size (abfd))
238
        {
239
          (*_bfd_error_handler)
240
            (_("%s: warning: illegal symbol index %ld in relocs"),
241
             bfd_get_filename (abfd), reloc->r_symndx);
242
          relent->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;
243
          ptr = NULL;
244
        }
245
      else
246
        {
247
          relent->sym_ptr_ptr = (symbols
248
                                 + obj_convert (abfd)[reloc->r_symndx]);
249
          ptr = *(relent->sym_ptr_ptr);
250
        }
251
    }
252
  else
253
    {
254
      relent->sym_ptr_ptr = section->symbol_ptr_ptr;
255
      ptr = *(relent->sym_ptr_ptr);
256
    }
257
 
258
  /* The symbols definitions that we have read in have been relocated
259
     as if their sections started at 0.  But the offsets refering to
260
     the symbols in the raw data have not been modified, so we have to
261
     have a negative addend to compensate.
262
 
263
     Note that symbols which used to be common must be left alone.  */
264
 
265
  /* Calculate any reloc addend by looking at the symbol.  */
266
  CALC_ADDEND (abfd, ptr, *reloc, relent);
267
 
268
  relent->address -= section->vma;
269
  /* !!     relent->section = (asection *) NULL;  */
270
 
271
  /* Fill in the relent->howto field from reloc->r_type.  */
272
  tic4x_lookup_howto (relent, reloc);
273
}
274
 
275
 
276
/* TI COFF v0, DOS tools (little-endian headers).  */
277
CREATE_LITTLE_COFF_TARGET_VEC(tic4x_coff0_vec, "coff0-tic4x", HAS_LOAD_PAGE, 0, '_', NULL, (PTR)&ticoff0_swap_table);
278
 
279
/* TI COFF v0, SPARC tools (big-endian headers).  */
280
CREATE_BIGHDR_COFF_TARGET_VEC(tic4x_coff0_beh_vec, "coff0-beh-tic4x", HAS_LOAD_PAGE, 0, '_', &tic4x_coff0_vec, (PTR)&ticoff0_swap_table);
281
 
282
/* TI COFF v1, DOS tools (little-endian headers).  */
283
CREATE_LITTLE_COFF_TARGET_VEC(tic4x_coff1_vec, "coff1-tic4x", HAS_LOAD_PAGE, 0, '_', &tic4x_coff0_beh_vec, (PTR)&ticoff1_swap_table);
284
 
285
/* TI COFF v1, SPARC tools (big-endian headers).  */
286
CREATE_BIGHDR_COFF_TARGET_VEC(tic4x_coff1_beh_vec, "coff1-beh-tic4x", HAS_LOAD_PAGE, 0, '_', &tic4x_coff1_vec, (PTR)&ticoff1_swap_table);
287
 
288
/* TI COFF v2, TI DOS tools output (little-endian headers).  */
289
CREATE_LITTLE_COFF_TARGET_VEC(tic4x_coff2_vec, "coff2-tic4x", HAS_LOAD_PAGE, 0, '_', &tic4x_coff1_beh_vec, COFF_SWAP_TABLE);
290
 
291
/* TI COFF v2, TI SPARC tools output (big-endian headers).  */
292
CREATE_BIGHDR_COFF_TARGET_VEC(tic4x_coff2_beh_vec, "coff2-beh-tic4x", HAS_LOAD_PAGE, 0, '_', &tic4x_coff2_vec, COFF_SWAP_TABLE);

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