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[/] [openrisc/] [trunk/] [gnu-old/] [gdb-6.8/] [bfd/] [elf32-pj.c] - Blame information for rev 853

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1 24 jeremybenn
/* picoJava specific support for 32-bit ELF
2
   Copyright 1999, 2000, 2001, 2002, 2005, 2007
3
   Free Software Foundation, Inc.
4
   Contributed by Steve Chamberlan of Transmeta (sac@pobox.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
9
   it under the terms of the GNU General Public License as published by
10
   the Free Software Foundation; either version 3 of the License, or
11
   (at your option) any later version.
12
 
13
   This program is distributed in the hope that it will be useful,
14
   but WITHOUT ANY WARRANTY; without even the implied warranty of
15
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16
   GNU General Public License for more details.
17
 
18
   You should have received a copy of the GNU General Public License
19
   along with this program; if not, write to the Free Software
20
   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
21
   MA 02110-1301, USA.  */
22
 
23
#include "sysdep.h"
24
#include "bfd.h"
25
#include "bfdlink.h"
26
#include "libbfd.h"
27
#include "elf-bfd.h"
28
#include "elf/pj.h"
29
 
30
/* This function is used for normal relocs.  This is like the COFF
31
   function, and is almost certainly incorrect for other ELF targets.  */
32
 
33
static bfd_reloc_status_type
34
pj_elf_reloc (bfd *abfd,
35
              arelent *reloc_entry,
36
              asymbol *symbol_in,
37
              void * data,
38
              asection *input_section,
39
              bfd *output_bfd,
40
              char **error_message ATTRIBUTE_UNUSED)
41
{
42
  unsigned long insn;
43
  bfd_vma sym_value;
44
  enum elf_pj_reloc_type r_type;
45
  bfd_vma addr = reloc_entry->address;
46
  bfd_byte *hit_data = addr + (bfd_byte *) data;
47
 
48
  r_type = (enum elf_pj_reloc_type) reloc_entry->howto->type;
49
 
50
  if (output_bfd != NULL)
51
    {
52
      /* Partial linking--do nothing.  */
53
      reloc_entry->address += input_section->output_offset;
54
      return bfd_reloc_ok;
55
    }
56
 
57
  if (symbol_in != NULL
58
      && bfd_is_und_section (symbol_in->section))
59
    return bfd_reloc_undefined;
60
 
61
  if (bfd_is_com_section (symbol_in->section))
62
    sym_value = 0;
63
  else
64
    sym_value = (symbol_in->value +
65
                 symbol_in->section->output_section->vma +
66
                 symbol_in->section->output_offset);
67
 
68
  switch (r_type)
69
    {
70
    case R_PJ_DATA_DIR32:
71
      insn = bfd_get_32 (abfd, hit_data);
72
      insn += sym_value + reloc_entry->addend;
73
      bfd_put_32 (abfd, (bfd_vma) insn, hit_data);
74
      break;
75
 
76
      /* Relocations in code are always bigendian, no matter what the
77
         data endianness is.  */
78
 
79
    case R_PJ_CODE_DIR32:
80
      insn = bfd_getb32 (hit_data);
81
      insn += sym_value + reloc_entry->addend;
82
      bfd_putb32 ((bfd_vma) insn, hit_data);
83
      break;
84
 
85
    case R_PJ_CODE_REL16:
86
      insn = bfd_getb16 (hit_data);
87
      insn += sym_value + reloc_entry->addend
88
        -  (input_section->output_section->vma
89
            + input_section->output_offset);
90
      bfd_putb16 ((bfd_vma) insn, hit_data);
91
      break;
92
    case R_PJ_CODE_LO16:
93
      insn = bfd_getb16 (hit_data);
94
      insn += sym_value + reloc_entry->addend;
95
      bfd_putb16 ((bfd_vma) insn, hit_data);
96
      break;
97
 
98
    case R_PJ_CODE_HI16:
99
      insn = bfd_getb16 (hit_data);
100
      insn += (sym_value + reloc_entry->addend) >> 16;
101
      bfd_putb16 ((bfd_vma) insn, hit_data);
102
      break;
103
 
104
    default:
105
      abort ();
106
      break;
107
    }
108
 
109
  return bfd_reloc_ok;
110
}
111
 
112
static reloc_howto_type pj_elf_howto_table[] =
113
{
114
  /* No relocation.  */
115
  HOWTO (R_PJ_NONE,             /* type */
116
         0,                      /* rightshift */
117
         0,                      /* size (0 = byte, 1 = short, 2 = long) */
118
         0,                      /* bitsize */
119
         FALSE,                 /* pc_relative */
120
         0,                      /* bitpos */
121
         complain_overflow_dont, /* complain_on_overflow */
122
         pj_elf_reloc,          /* special_function */
123
         "R_PJ_NONE",           /* name */
124
         FALSE,                 /* partial_inplace */
125
         0,                      /* src_mask */
126
         0,                      /* dst_mask */
127
         FALSE),                /* pcrel_offset */
128
 
129
  /* 32 bit absolute relocation.  Setting partial_inplace to TRUE and
130
     src_mask to a non-zero value is similar to the COFF toolchain.  */
131
  HOWTO (R_PJ_DATA_DIR32,       /* type */
132
         0,                      /* rightshift */
133
         2,                     /* size (0 = byte, 1 = short, 2 = long) */
134
         32,                    /* bitsize */
135
         FALSE,                 /* pc_relative */
136
         0,                      /* bitpos */
137
         complain_overflow_bitfield, /* complain_on_overflow */
138
         pj_elf_reloc,          /* special_function */
139
         "R_PJ_DIR32",          /* name */
140
         TRUE,                  /* partial_inplace */
141
         0xffffffff,            /* src_mask */
142
         0xffffffff,            /* dst_mask */
143
         FALSE),                /* pcrel_offset */
144
 
145
  /* 32 bit PC relative relocation.  */
146
  HOWTO (R_PJ_CODE_REL32,       /* type */
147
         0,                      /* rightshift */
148
         2,                     /* size (0 = byte, 1 = short, 2 = long) */
149
         32,                    /* bitsize */
150
         TRUE,                  /* pc_relative */
151
         0,                      /* bitpos */
152
         complain_overflow_signed, /* complain_on_overflow */
153
         pj_elf_reloc,          /* special_function */
154
         "R_PJ_REL32",          /* name */
155
         FALSE,                 /* partial_inplace */
156
         0,                      /* src_mask */
157
         0xffffffff,            /* dst_mask */
158
         TRUE),                 /* pcrel_offset */
159
 
160
/* 16 bit PC relative relocation.  */
161
  HOWTO (R_PJ_CODE_REL16,       /* type */
162
         0,                      /* rightshift */
163
         1,                     /* size (0 = byte, 1 = short, 2 = long) */
164
         16,                    /* bitsize */
165
         TRUE,                  /* pc_relative */
166
         0,                      /* bitpos */
167
         complain_overflow_signed, /* complain_on_overf6w */
168
         pj_elf_reloc,          /* special_function */
169
         "R_PJ_REL16",          /* name */
170
         FALSE,                 /* partial_inplace */
171
         0xffff,                /* src_mask */
172
         0xffff,                /* dst_mask */
173
         TRUE),                 /* pcrel_offset */
174
  EMPTY_HOWTO (4),
175
  EMPTY_HOWTO (5),
176
  HOWTO (R_PJ_CODE_DIR32,       /* type */
177
         0,                      /* rightshift */
178
         2,                     /* size (0 = byte, 1 = short, 2 = long) */
179
         32,                    /* bitsize */
180
         FALSE,                 /* pc_relative */
181
         0,                      /* bitpos */
182
         complain_overflow_bitfield, /* complain_on_overflow */
183
         pj_elf_reloc,          /* special_function */
184
         "R_PJ_CODE_DIR32",     /* name */
185
         TRUE,                  /* partial_inplace */
186
         0xffffffff,            /* src_mask */
187
         0xffffffff,            /* dst_mask */
188
         FALSE),                /* pcrel_offset */
189
 
190
  EMPTY_HOWTO (7),
191
  EMPTY_HOWTO (8),
192
  EMPTY_HOWTO (9),
193
  EMPTY_HOWTO (10),
194
  EMPTY_HOWTO (11),
195
  EMPTY_HOWTO (12),
196
 
197
  HOWTO (R_PJ_CODE_LO16,        /* type */
198
         0,                      /* rightshift */
199
         1,                     /* size (0 = byte, 1 = short, 2 = long) */
200
         16,                    /* bitsize */
201
         FALSE,                 /* pc_relative */
202
         0,                      /* bitpos */
203
         complain_overflow_unsigned, /* complain_on_overflow */
204
         pj_elf_reloc,          /* special_function */
205
         "R_PJ_LO16",           /* name */
206
         FALSE,                 /* partial_inplace */
207
         0xffff,                /* src_mask */
208
         0xffff,                /* dst_mask */
209
         TRUE),                 /* pcrel_offset */
210
 
211
    HOWTO (R_PJ_CODE_HI16,      /* type */
212
         16,                    /* rightshift */
213
         1,                     /* size (0 = byte, 1 = short, 2 = long) */
214
         16,                    /* bitsize */
215
         FALSE,                 /* pc_relative */
216
         0,                      /* bitpos */
217
         complain_overflow_unsigned, /* complain_on_overflow */
218
         pj_elf_reloc,          /* special_function */
219
         "R_PJ_HI16",           /* name */
220
         FALSE,                 /* partial_inplace */
221
         0xffff,                /* src_mask */
222
         0xffff,                /* dst_mask */
223
         TRUE),                 /* pcrel_offset */
224
 
225
  /* GNU extension to record C++ vtable hierarchy.  */
226
  HOWTO (R_PJ_GNU_VTINHERIT,    /* type */
227
         0,                     /* rightshift */
228
         2,                     /* size (0 = byte, 1 = short, 2 = long) */
229
         0,                     /* bitsize */
230
         FALSE,                 /* pc_relative */
231
         0,                     /* bitpos */
232
         complain_overflow_dont, /* complain_on_overflow */
233
         NULL,                  /* special_function */
234
         "R_PJ_GNU_VTINHERIT",  /* name */
235
         FALSE,                 /* partial_inplace */
236
         0,                     /* src_mask */
237
         0,                     /* dst_mask */
238
         FALSE),                /* pcrel_offset */
239
 
240
  /* GNU extension to record C++ vtable member usage.  */
241
  HOWTO (R_PJ_GNU_VTENTRY,     /* type */
242
         0,                     /* rightshift */
243
         2,                     /* size (0 = byte, 1 = short, 2 = long) */
244
         0,                     /* bitsize */
245
         FALSE,                 /* pc_relative */
246
         0,                     /* bitpos */
247
         complain_overflow_dont, /* complain_on_overflow */
248
         _bfd_elf_rel_vtable_reloc_fn,  /* special_function */
249
         "R_PJ_GNU_VTENTRY",   /* name */
250
         FALSE,                 /* partial_inplace */
251
         0,                     /* src_mask */
252
         0,                     /* dst_mask */
253
         FALSE),                /* pcrel_offset */
254
};
255
 
256
/* This structure is used to map BFD reloc codes to PJ ELF relocs.  */
257
 
258
struct elf_reloc_map
259
{
260
  bfd_reloc_code_real_type bfd_reloc_val;
261
  unsigned char elf_reloc_val;
262
};
263
 
264
/* An array mapping BFD reloc codes to PJ ELF relocs.  */
265
 
266
static const struct elf_reloc_map pj_reloc_map[] =
267
{
268
    { BFD_RELOC_NONE,           R_PJ_NONE          },
269
    { BFD_RELOC_32,             R_PJ_DATA_DIR32    },
270
    { BFD_RELOC_PJ_CODE_DIR16,  R_PJ_CODE_DIR16    },
271
    { BFD_RELOC_PJ_CODE_DIR32,  R_PJ_CODE_DIR32    },
272
    { BFD_RELOC_PJ_CODE_LO16,   R_PJ_CODE_LO16     },
273
    { BFD_RELOC_PJ_CODE_HI16,   R_PJ_CODE_HI16     },
274
    { BFD_RELOC_PJ_CODE_REL32,  R_PJ_CODE_REL32    },
275
    { BFD_RELOC_PJ_CODE_REL16,  R_PJ_CODE_REL16    },
276
    { BFD_RELOC_VTABLE_INHERIT, R_PJ_GNU_VTINHERIT },
277
    { BFD_RELOC_VTABLE_ENTRY,   R_PJ_GNU_VTENTRY   },
278
};
279
 
280
/* Given a BFD reloc code, return the howto structure for the
281
   corresponding PJ ELf reloc.  */
282
 
283
static reloc_howto_type *
284
pj_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
285
                          bfd_reloc_code_real_type code)
286
{
287
  unsigned int i;
288
 
289
  for (i = 0; i < sizeof (pj_reloc_map) / sizeof (struct elf_reloc_map); i++)
290
    if (pj_reloc_map[i].bfd_reloc_val == code)
291
      return & pj_elf_howto_table[(int) pj_reloc_map[i].elf_reloc_val];
292
 
293
  return NULL;
294
}
295
 
296
static reloc_howto_type *
297
pj_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
298
                          const char *r_name)
299
{
300
  unsigned int i;
301
 
302
  for (i = 0;
303
       i < sizeof (pj_elf_howto_table) / sizeof (pj_elf_howto_table[0]);
304
       i++)
305
    if (pj_elf_howto_table[i].name != NULL
306
        && strcasecmp (pj_elf_howto_table[i].name, r_name) == 0)
307
      return &pj_elf_howto_table[i];
308
 
309
  return NULL;
310
}
311
 
312
/* Given an ELF reloc, fill in the howto field of a relent.  */
313
 
314
static void
315
pj_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
316
                      arelent *cache_ptr,
317
                      Elf_Internal_Rela *dst)
318
{
319
  unsigned int r;
320
 
321
  r = ELF32_R_TYPE (dst->r_info);
322
 
323
  BFD_ASSERT (r < (unsigned int) R_PJ_max);
324
 
325
  cache_ptr->howto = &pj_elf_howto_table[r];
326
}
327
 
328
/* Take this moment to fill in the special picoJava bits in the
329
   e_flags field.  */
330
 
331
static void
332
pj_elf_final_write_processing (bfd *abfd,
333
                               bfd_boolean linker ATTRIBUTE_UNUSED)
334
{
335
  elf_elfheader (abfd)->e_flags |= EF_PICOJAVA_ARCH;
336
  elf_elfheader (abfd)->e_flags |= EF_PICOJAVA_GNUCALLS;
337
}
338
 
339
#define TARGET_BIG_SYM          bfd_elf32_pj_vec
340
#define TARGET_BIG_NAME         "elf32-pj"
341
#define TARGET_LITTLE_SYM       bfd_elf32_pjl_vec
342
#define TARGET_LITTLE_NAME      "elf32-pjl"
343
#define ELF_ARCH                bfd_arch_pj
344
#define ELF_MACHINE_CODE        EM_PJ
345
#define ELF_MACHINE_ALT1        EM_PJ_OLD
346
#define ELF_MAXPAGESIZE         0x1000
347
#define bfd_elf32_bfd_get_relocated_section_contents \
348
  bfd_generic_get_relocated_section_contents
349
#define bfd_elf32_bfd_reloc_type_lookup         pj_elf_reloc_type_lookup
350
#define bfd_elf32_bfd_reloc_name_lookup   pj_elf_reloc_name_lookup
351
#define elf_backend_final_write_processing      pj_elf_final_write_processing
352
#define elf_info_to_howto                       pj_elf_info_to_howto
353
#include "elf32-target.h"

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