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[/] [openrisc/] [trunk/] [gnu-src/] [gdb-6.8/] [bfd/] [elf32-i370.c] - Blame information for rev 225

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1 24 jeremybenn
/* i370-specific support for 32-bit ELF
2
   Copyright 1994, 1995, 1996, 1997, 1998, 2000, 2001, 2002, 2003, 2004,
3 225 jeremybenn
   2005, 2006, 2007, 2008  Free Software Foundation, Inc.
4 24 jeremybenn
   Written by Ian Lance Taylor, Cygnus Support.
5
   Hacked by Linas Vepstas for i370 linas@linas.org
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,
22
   MA 02110-1301, USA.  */
23
 
24
/* This file is based on a preliminary PowerPC ELF ABI.
25
   But its been hacked on for the IBM 360/370 architectures.
26
   Basically, the 31bit relocation works, and just about everything
27
   else is a wild card.  In particular, don't expect shared libs or
28
   dynamic loading to work ...  its never been tested.  */
29
 
30
#include "sysdep.h"
31
#include "bfd.h"
32
#include "bfdlink.h"
33
#include "libbfd.h"
34
#include "elf-bfd.h"
35
#include "elf/i370.h"
36
 
37
static reloc_howto_type *i370_elf_howto_table[ (int)R_I370_max ];
38
 
39
static reloc_howto_type i370_elf_howto_raw[] =
40
{
41
  /* This reloc does nothing.  */
42
  HOWTO (R_I370_NONE,           /* type */
43
         0,                      /* rightshift */
44
         2,                     /* size (0 = byte, 1 = short, 2 = long) */
45
         32,                    /* bitsize */
46
         FALSE,                 /* pc_relative */
47
         0,                      /* bitpos */
48
         complain_overflow_bitfield, /* complain_on_overflow */
49
         bfd_elf_generic_reloc, /* special_function */
50
         "R_I370_NONE",         /* name */
51
         FALSE,                 /* partial_inplace */
52
         0,                      /* src_mask */
53
         0,                      /* dst_mask */
54
         FALSE),                /* pcrel_offset */
55
 
56
  /* A standard 31 bit relocation.  */
57
  HOWTO (R_I370_ADDR31,         /* type */
58
         0,                      /* rightshift */
59
         2,                     /* size (0 = byte, 1 = short, 2 = long) */
60
         31,                    /* bitsize */
61
         FALSE,                 /* pc_relative */
62
         0,                      /* bitpos */
63
         complain_overflow_bitfield, /* complain_on_overflow */
64
         bfd_elf_generic_reloc, /* special_function */
65
         "R_I370_ADDR31",       /* name */
66
         FALSE,                 /* partial_inplace */
67
         0,                      /* src_mask */
68
         0x7fffffff,            /* dst_mask */
69
         FALSE),                /* pcrel_offset */
70
 
71
  /* A standard 32 bit relocation.  */
72
  HOWTO (R_I370_ADDR32,         /* type */
73
         0,                      /* rightshift */
74
         2,                     /* size (0 = byte, 1 = short, 2 = long) */
75
         32,                    /* bitsize */
76
         FALSE,                 /* pc_relative */
77
         0,                      /* bitpos */
78
         complain_overflow_bitfield, /* complain_on_overflow */
79
         bfd_elf_generic_reloc, /* special_function */
80
         "R_I370_ADDR32",       /* name */
81
         FALSE,                 /* partial_inplace */
82
         0,                      /* src_mask */
83
         0xffffffff,            /* dst_mask */
84
         FALSE),                /* pcrel_offset */
85
 
86
  /* A standard 16 bit relocation.  */
87
  HOWTO (R_I370_ADDR16,         /* type */
88
         0,                      /* rightshift */
89
         1,                     /* size (0 = byte, 1 = short, 2 = long) */
90
         16,                    /* bitsize */
91
         FALSE,                 /* pc_relative */
92
         0,                      /* bitpos */
93
         complain_overflow_bitfield, /* complain_on_overflow */
94
         bfd_elf_generic_reloc, /* special_function */
95
         "R_I370_ADDR16",       /* name */
96
         FALSE,                 /* partial_inplace */
97
         0,                      /* src_mask */
98
         0xffff,                /* dst_mask */
99
         FALSE),                /* pcrel_offset */
100
 
101
  /* 31-bit PC relative.  */
102
  HOWTO (R_I370_REL31,          /* type */
103
         0,                      /* rightshift */
104
         2,                     /* size (0 = byte, 1 = short, 2 = long) */
105
         31,                    /* bitsize */
106
         TRUE,                  /* pc_relative */
107
         0,                      /* bitpos */
108
         complain_overflow_bitfield, /* complain_on_overflow */
109
         bfd_elf_generic_reloc, /* special_function */
110
         "R_I370_REL31",        /* name */
111
         FALSE,                 /* partial_inplace */
112
         0,                      /* src_mask */
113
         0x7fffffff,            /* dst_mask */
114
         TRUE),                 /* pcrel_offset */
115
 
116
  /* 32-bit PC relative.  */
117
  HOWTO (R_I370_REL32,          /* type */
118
         0,                      /* rightshift */
119
         2,                     /* size (0 = byte, 1 = short, 2 = long) */
120
         32,                    /* bitsize */
121
         TRUE,                  /* pc_relative */
122
         0,                      /* bitpos */
123
         complain_overflow_bitfield, /* complain_on_overflow */
124
         bfd_elf_generic_reloc, /* special_function */
125
         "R_I370_REL32",        /* name */
126
         FALSE,                 /* partial_inplace */
127
         0,                      /* src_mask */
128
         0xffffffff,            /* dst_mask */
129
         TRUE),                 /* pcrel_offset */
130
 
131
  /* A standard 12 bit relocation.  */
132
  HOWTO (R_I370_ADDR12,         /* type */
133
         0,                      /* rightshift */
134
         1,                     /* size (0 = byte, 1 = short, 2 = long) */
135
         12,                    /* bitsize */
136
         FALSE,                 /* pc_relative */
137
         0,                      /* bitpos */
138
         complain_overflow_bitfield, /* complain_on_overflow */
139
         bfd_elf_generic_reloc, /* special_function */
140
         "R_I370_ADDR12",       /* name */
141
         FALSE,                 /* partial_inplace */
142
         0,                      /* src_mask */
143
         0xfff,                 /* dst_mask */
144
         FALSE),                /* pcrel_offset */
145
 
146
  /* 12-bit PC relative.  */
147
  HOWTO (R_I370_REL12,          /* type */
148
         0,                      /* rightshift */
149
         1,                     /* size (0 = byte, 1 = short, 2 = long) */
150
         12,                    /* bitsize */
151
         TRUE,                  /* pc_relative */
152
         0,                      /* bitpos */
153
         complain_overflow_bitfield, /* complain_on_overflow */
154
         bfd_elf_generic_reloc, /* special_function */
155
         "R_I370_REL12",        /* name */
156
         FALSE,                 /* partial_inplace */
157
         0,                      /* src_mask */
158
         0xfff,                 /* dst_mask */
159
         TRUE),                 /* pcrel_offset */
160
 
161
  /* A standard 8 bit relocation.  */
162
  HOWTO (R_I370_ADDR8,          /* type */
163
         0,                      /* rightshift */
164
         0,                      /* size (0 = byte, 1 = short, 2 = long) */
165
         8,                     /* bitsize */
166
         FALSE,                 /* pc_relative */
167
         0,                      /* bitpos */
168
         complain_overflow_bitfield, /* complain_on_overflow */
169
         bfd_elf_generic_reloc, /* special_function */
170
         "R_I370_ADDR8",        /* name */
171
         FALSE,                 /* partial_inplace */
172
         0,                      /* src_mask */
173
         0xff,                  /* dst_mask */
174
         FALSE),                /* pcrel_offset */
175
 
176
  /* 8-bit PC relative.  */
177
  HOWTO (R_I370_REL8,           /* type */
178
         0,                      /* rightshift */
179
         0,                      /* size (0 = byte, 1 = short, 2 = long) */
180
         8,                     /* bitsize */
181
         TRUE,                  /* pc_relative */
182
         0,                      /* bitpos */
183
         complain_overflow_bitfield, /* complain_on_overflow */
184
         bfd_elf_generic_reloc, /* special_function */
185
         "R_I370_REL8",         /* name */
186
         FALSE,                 /* partial_inplace */
187
         0,                      /* src_mask */
188
         0xff,                  /* dst_mask */
189
         TRUE),                 /* pcrel_offset */
190
 
191
  /* This is used only by the dynamic linker.  The symbol should exist
192
     both in the object being run and in some shared library.  The
193
     dynamic linker copies the data addressed by the symbol from the
194
     shared library into the object, because the object being
195
     run has to have the data at some particular address.  */
196
  HOWTO (R_I370_COPY,           /* type */
197
         0,                      /* rightshift */
198
         2,                     /* size (0 = byte, 1 = short, 2 = long) */
199
         32,                    /* bitsize */
200
         FALSE,                 /* pc_relative */
201
         0,                      /* bitpos */
202
         complain_overflow_bitfield, /* complain_on_overflow */
203
         bfd_elf_generic_reloc,  /* special_function */
204
         "R_I370_COPY",         /* name */
205
         FALSE,                 /* partial_inplace */
206
         0,                      /* src_mask */
207
         0,                      /* dst_mask */
208
         FALSE),                /* pcrel_offset */
209
 
210
  /* Used only by the dynamic linker.  When the object is run, this
211
     longword is set to the load address of the object, plus the
212
     addend.  */
213
  HOWTO (R_I370_RELATIVE,       /* type */
214
         0,                      /* rightshift */
215
         2,                     /* size (0 = byte, 1 = short, 2 = long) */
216
         32,                    /* bitsize */
217
         FALSE,                 /* pc_relative */
218
         0,                      /* bitpos */
219
         complain_overflow_bitfield, /* complain_on_overflow */
220
         bfd_elf_generic_reloc,  /* special_function */
221
         "R_I370_RELATIVE",     /* name */
222
         FALSE,                 /* partial_inplace */
223
         0,                      /* src_mask */
224
         0xffffffff,            /* dst_mask */
225
         FALSE),                /* pcrel_offset */
226
 
227
};
228
 
229
/* Initialize the i370_elf_howto_table, so that linear accesses can be done.  */
230
 
231
static void
232
i370_elf_howto_init (void)
233
{
234
  unsigned int i, type;
235
 
236
  for (i = 0; i < sizeof (i370_elf_howto_raw) / sizeof (i370_elf_howto_raw[0]); i++)
237
    {
238
      type = i370_elf_howto_raw[i].type;
239
      BFD_ASSERT (type < sizeof (i370_elf_howto_table) / sizeof (i370_elf_howto_table[0]));
240
      i370_elf_howto_table[type] = &i370_elf_howto_raw[i];
241
    }
242
}
243
 
244
static reloc_howto_type *
245
i370_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
246
                            bfd_reloc_code_real_type code)
247
{
248
  enum i370_reloc_type i370_reloc = R_I370_NONE;
249
 
250
  if (!i370_elf_howto_table[ R_I370_ADDR31 ])
251
    /* Initialize howto table if needed.  */
252
    i370_elf_howto_init ();
253
 
254
  switch ((int) code)
255
    {
256
    default:
257
      return NULL;
258
 
259
    case BFD_RELOC_NONE:        i370_reloc = R_I370_NONE;       break;
260
    case BFD_RELOC_32:          i370_reloc = R_I370_ADDR31;     break;
261
    case BFD_RELOC_16:          i370_reloc = R_I370_ADDR16;     break;
262
    case BFD_RELOC_32_PCREL:    i370_reloc = R_I370_REL31;      break;
263
    case BFD_RELOC_CTOR:        i370_reloc = R_I370_ADDR31;     break;
264
    case BFD_RELOC_I370_D12:    i370_reloc = R_I370_ADDR12;     break;
265
    }
266
 
267
  return i370_elf_howto_table[ (int)i370_reloc ];
268
};
269
 
270
static reloc_howto_type *
271
i370_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
272
                            const char *r_name)
273
{
274
  unsigned int i;
275
 
276
  for (i = 0;
277
       i < sizeof (i370_elf_howto_raw) / sizeof (i370_elf_howto_raw[0]);
278
       i++)
279
    if (i370_elf_howto_raw[i].name != NULL
280
        && strcasecmp (i370_elf_howto_raw[i].name, r_name) == 0)
281
      return &i370_elf_howto_raw[i];
282
 
283
  return NULL;
284
}
285
 
286
/* The name of the dynamic interpreter.  This is put in the .interp
287
    section.  */
288
 
289
#define ELF_DYNAMIC_INTERPRETER "/lib/ld.so"
290
 
291
/* Set the howto pointer for an i370 ELF reloc.  */
292
 
293
static void
294
i370_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
295
                        arelent *cache_ptr,
296
                        Elf_Internal_Rela *dst)
297
{
298
  if (!i370_elf_howto_table[ R_I370_ADDR31 ])
299
    /* Initialize howto table.  */
300
    i370_elf_howto_init ();
301
 
302
  BFD_ASSERT (ELF32_R_TYPE (dst->r_info) < (unsigned int) R_I370_max);
303
  cache_ptr->howto = i370_elf_howto_table[ELF32_R_TYPE (dst->r_info)];
304
}
305
 
306
/* Hack alert --  the following several routines look generic to me ...
307
   why are we bothering with them ?  */
308
/* Function to set whether a module needs the -mrelocatable bit set.  */
309
 
310
static bfd_boolean
311
i370_elf_set_private_flags (bfd *abfd, flagword flags)
312
{
313
  BFD_ASSERT (!elf_flags_init (abfd)
314
              || elf_elfheader (abfd)->e_flags == flags);
315
 
316
  elf_elfheader (abfd)->e_flags = flags;
317
  elf_flags_init (abfd) = TRUE;
318
  return TRUE;
319
}
320
 
321
/* Merge backend specific data from an object file to the output
322
   object file when linking.  */
323
 
324
static bfd_boolean
325
i370_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
326
{
327
  flagword old_flags;
328
  flagword new_flags;
329
 
330
  if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
331
      || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
332
    return TRUE;
333
 
334
  new_flags = elf_elfheader (ibfd)->e_flags;
335
  old_flags = elf_elfheader (obfd)->e_flags;
336
  if (!elf_flags_init (obfd))   /* First call, no flags set.  */
337
    {
338
      elf_flags_init (obfd) = TRUE;
339
      elf_elfheader (obfd)->e_flags = new_flags;
340
    }
341
 
342
  else if (new_flags == old_flags)      /* Compatible flags are ok.  */
343
    ;
344
 
345
  else                                  /* Incompatible flags.  */
346
    {
347
      (*_bfd_error_handler)
348
        ("%B: uses different e_flags (0x%lx) fields than previous modules (0x%lx)",
349
         ibfd, (long) new_flags, (long) old_flags);
350
 
351
      bfd_set_error (bfd_error_bad_value);
352
      return FALSE;
353
    }
354
 
355
  return TRUE;
356
}
357
 
358
/* Handle an i370 specific section when reading an object file.  This
359
   is called when elfcode.h finds a section with an unknown type.  */
360
/* XXX hack alert bogus This routine is mostly all junk and almost
361
   certainly does the wrong thing.  Its here simply because it does
362
   just enough to allow glibc-2.1 ld.so to compile & link.  */
363
 
364
static bfd_boolean
365
i370_elf_section_from_shdr (bfd *abfd,
366
                            Elf_Internal_Shdr *hdr,
367
                            const char *name,
368
                            int shindex)
369
{
370
  asection *newsect;
371
  flagword flags;
372
 
373
  if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
374
    return FALSE;
375
 
376
  newsect = hdr->bfd_section;
377
  flags = bfd_get_section_flags (abfd, newsect);
378
  if (hdr->sh_flags & SHF_EXCLUDE)
379
    flags |= SEC_EXCLUDE;
380
 
381
  if (hdr->sh_type == SHT_ORDERED)
382
    flags |= SEC_SORT_ENTRIES;
383
 
384
  bfd_set_section_flags (abfd, newsect, flags);
385
  return TRUE;
386
}
387
 
388
/* Set up any other section flags and such that may be necessary.  */
389
/* XXX hack alert bogus This routine is mostly all junk and almost
390
   certainly does the wrong thing.  Its here simply because it does
391
   just enough to allow glibc-2.1 ld.so to compile & link.  */
392
 
393
static bfd_boolean
394
i370_elf_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
395
                        Elf_Internal_Shdr *shdr,
396
                        asection *asect)
397
{
398
  if ((asect->flags & (SEC_GROUP | SEC_EXCLUDE)) == SEC_EXCLUDE)
399
    shdr->sh_flags |= SHF_EXCLUDE;
400
 
401
  if ((asect->flags & SEC_SORT_ENTRIES) != 0)
402
    shdr->sh_type = SHT_ORDERED;
403
 
404
  return TRUE;
405
}
406
 
407
/* We have to create .dynsbss and .rela.sbss here so that they get mapped
408
   to output sections (just like _bfd_elf_create_dynamic_sections has
409
   to create .dynbss and .rela.bss).  */
410
/* XXX hack alert bogus This routine is mostly all junk and almost
411
   certainly does the wrong thing.  Its here simply because it does
412
   just enough to allow glibc-2.1 ld.so to compile & link.  */
413
 
414
static bfd_boolean
415
i370_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
416
{
417
  asection *s;
418
  flagword flags;
419
 
420
  if (!_bfd_elf_create_dynamic_sections(abfd, info))
421
    return FALSE;
422
 
423
  flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
424
           | SEC_LINKER_CREATED);
425
 
426
  s = bfd_make_section_with_flags (abfd, ".dynsbss",
427
                                   SEC_ALLOC | SEC_LINKER_CREATED);
428
  if (s == NULL)
429
    return FALSE;
430
 
431
  if (! info->shared)
432
    {
433
      s = bfd_make_section_with_flags (abfd, ".rela.sbss",
434
                                       flags | SEC_READONLY);
435
      if (s == NULL
436
          || ! bfd_set_section_alignment (abfd, s, 2))
437
        return FALSE;
438
    }
439
 
440
   /* XXX beats me, seem to need a rela.text ...  */
441
   s = bfd_make_section_with_flags (abfd, ".rela.text",
442
                                    flags | SEC_READONLY);
443
   if (s == NULL
444
      || ! bfd_set_section_alignment (abfd, s, 2))
445
    return FALSE;
446
  return TRUE;
447
}
448
 
449
/* Adjust a symbol defined by a dynamic object and referenced by a
450
   regular object.  The current definition is in some section of the
451
   dynamic object, but we're not including those sections.  We have to
452
   change the definition to something the rest of the link can
453
   understand.  */
454
/* XXX hack alert bogus This routine is mostly all junk and almost
455
   certainly does the wrong thing.  Its here simply because it does
456
   just enough to allow glibc-2.1 ld.so to compile & link.  */
457
 
458
static bfd_boolean
459
i370_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
460
                                struct elf_link_hash_entry *h)
461
{
462
  bfd *dynobj = elf_hash_table (info)->dynobj;
463
  asection *s;
464
 
465
#ifdef DEBUG
466
  fprintf (stderr, "i370_elf_adjust_dynamic_symbol called for %s\n",
467
           h->root.root.string);
468
#endif
469
 
470
  /* Make sure we know what is going on here.  */
471
  BFD_ASSERT (dynobj != NULL
472
              && (h->needs_plt
473
                  || h->u.weakdef != NULL
474
                  || (h->def_dynamic
475
                      && h->ref_regular
476
                      && !h->def_regular)));
477
 
478
  s = bfd_get_section_by_name (dynobj, ".rela.text");
479
  BFD_ASSERT (s != NULL);
480
  s->size += sizeof (Elf32_External_Rela);
481
 
482
  /* If this is a weak symbol, and there is a real definition, the
483
     processor independent code will have arranged for us to see the
484
     real definition first, and we can just use the same value.  */
485
  if (h->u.weakdef != NULL)
486
    {
487
      BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
488
                  || h->u.weakdef->root.type == bfd_link_hash_defweak);
489
      h->root.u.def.section = h->u.weakdef->root.u.def.section;
490
      h->root.u.def.value = h->u.weakdef->root.u.def.value;
491
      return TRUE;
492
    }
493
 
494
  /* This is a reference to a symbol defined by a dynamic object which
495
     is not a function.  */
496
 
497
  /* If we are creating a shared library, we must presume that the
498
     only references to the symbol are via the global offset table.
499
     For such cases we need not do anything here; the relocations will
500
     be handled correctly by relocate_section.  */
501
  if (info->shared)
502
    return TRUE;
503
 
504
  if (h->size == 0)
505
    {
506
      (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
507
                             h->root.root.string);
508
      return TRUE;
509
    }
510
 
511
  /* We must allocate the symbol in our .dynbss section, which will
512
     become part of the .bss section of the executable.  There will be
513
     an entry for this symbol in the .dynsym section.  The dynamic
514
     object will contain position independent code, so all references
515
     from the dynamic object to this symbol will go through the global
516
     offset table.  The dynamic linker will use the .dynsym entry to
517
     determine the address it must put in the global offset table, so
518
     both the dynamic object and the regular object will refer to the
519
     same memory location for the variable.
520
 
521
     Of course, if the symbol is sufficiently small, we must instead
522
     allocate it in .sbss.  FIXME: It would be better to do this if and
523
     only if there were actually SDAREL relocs for that symbol.  */
524
 
525
  if (h->size <= elf_gp_size (dynobj))
526
    s = bfd_get_section_by_name (dynobj, ".dynsbss");
527
  else
528
    s = bfd_get_section_by_name (dynobj, ".dynbss");
529
  BFD_ASSERT (s != NULL);
530
 
531
  /* We must generate a R_I370_COPY reloc to tell the dynamic linker to
532
     copy the initial value out of the dynamic object and into the
533
     runtime process image.  We need to remember the offset into the
534
     .rela.bss section we are going to use.  */
535
  if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
536
    {
537
      asection *srel;
538
 
539
      if (h->size <= elf_gp_size (dynobj))
540
        srel = bfd_get_section_by_name (dynobj, ".rela.sbss");
541
      else
542
        srel = bfd_get_section_by_name (dynobj, ".rela.bss");
543
      BFD_ASSERT (srel != NULL);
544
      srel->size += sizeof (Elf32_External_Rela);
545
      h->needs_copy = 1;
546
    }
547
 
548
  return _bfd_elf_adjust_dynamic_copy (h, s);
549
}
550
 
551
/* Increment the index of a dynamic symbol by a given amount.  Called
552
   via elf_link_hash_traverse.  */
553
/* XXX hack alert bogus This routine is mostly all junk and almost
554
   certainly does the wrong thing.  Its here simply because it does
555
   just enough to allow glibc-2.1 ld.so to compile & link.  */
556
 
557
static bfd_boolean
558
i370_elf_adjust_dynindx (struct elf_link_hash_entry *h, void * cparg)
559
{
560
  int *cp = (int *) cparg;
561
 
562
#ifdef DEBUG
563
  fprintf (stderr,
564
           "i370_elf_adjust_dynindx called, h->dynindx = %ld, *cp = %d\n",
565
           h->dynindx, *cp);
566
#endif
567
 
568
  if (h->root.type == bfd_link_hash_warning)
569
    h = (struct elf_link_hash_entry *) h->root.u.i.link;
570
 
571
  if (h->dynindx != -1)
572
    h->dynindx += *cp;
573
 
574
  return TRUE;
575
}
576
 
577
/* Set the sizes of the dynamic sections.  */
578
/* XXX hack alert bogus This routine is mostly all junk and almost
579
   certainly does the wrong thing.  Its here simply because it does
580
   just enough to allow glibc-2.1 ld.so to compile & link.  */
581
 
582
static bfd_boolean
583
i370_elf_size_dynamic_sections (bfd *output_bfd,
584
                                struct bfd_link_info *info)
585
{
586
  bfd *dynobj;
587
  asection *s;
588
  bfd_boolean plt;
589
  bfd_boolean relocs;
590
  bfd_boolean reltext;
591
 
592
#ifdef DEBUG
593
  fprintf (stderr, "i370_elf_size_dynamic_sections called\n");
594
#endif
595
 
596
  dynobj = elf_hash_table (info)->dynobj;
597
  BFD_ASSERT (dynobj != NULL);
598
 
599
  if (elf_hash_table (info)->dynamic_sections_created)
600
    {
601
      /* Set the contents of the .interp section to the interpreter.  */
602
      if (info->executable)
603
        {
604
          s = bfd_get_section_by_name (dynobj, ".interp");
605
          BFD_ASSERT (s != NULL);
606
          s->size = sizeof ELF_DYNAMIC_INTERPRETER;
607
          s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
608
        }
609
    }
610
  else
611
    {
612
      /* We may have created entries in the .rela.got, .rela.sdata, and
613
         .rela.sdata2 sections.  However, if we are not creating the
614
         dynamic sections, we will not actually use these entries.  Reset
615
         the size of .rela.got, et al, which will cause it to get
616
         stripped from the output file below.  */
617
      static char *rela_sections[] = { ".rela.got", ".rela.sdata",
618
                                       ".rela.sdata2", ".rela.sbss",
619
                                       NULL };
620
      char **p;
621
 
622
      for (p = rela_sections; *p != NULL; p++)
623
        {
624
          s = bfd_get_section_by_name (dynobj, *p);
625
          if (s != NULL)
626
            s->size = 0;
627
        }
628
    }
629
 
630
  /* The check_relocs and adjust_dynamic_symbol entry points have
631
     determined the sizes of the various dynamic sections.  Allocate
632
     memory for them.  */
633
  plt = FALSE;
634
  relocs = FALSE;
635
  reltext = FALSE;
636
  for (s = dynobj->sections; s != NULL; s = s->next)
637
    {
638
      const char *name;
639
 
640
      if ((s->flags & SEC_LINKER_CREATED) == 0)
641
        continue;
642
 
643
      /* It's OK to base decisions on the section name, because none
644
         of the dynobj section names depend upon the input files.  */
645
      name = bfd_get_section_name (dynobj, s);
646
 
647
      if (strcmp (name, ".plt") == 0)
648
        {
649
          /* Remember whether there is a PLT.  */
650
          plt = s->size != 0;
651
        }
652
      else if (CONST_STRNEQ (name, ".rela"))
653
        {
654
          if (s->size != 0)
655
            {
656
              asection *target;
657
              const char *outname;
658
 
659
              /* Remember whether there are any relocation sections.  */
660
              relocs = TRUE;
661
 
662
              /* If this relocation section applies to a read only
663
                 section, then we probably need a DT_TEXTREL entry.  */
664
              outname = bfd_get_section_name (output_bfd,
665
                                              s->output_section);
666
              target = bfd_get_section_by_name (output_bfd, outname + 5);
667
              if (target != NULL
668
                  && (target->flags & SEC_READONLY) != 0
669
                  && (target->flags & SEC_ALLOC) != 0)
670
                reltext = TRUE;
671
 
672
              /* We use the reloc_count field as a counter if we need
673
                 to copy relocs into the output file.  */
674
              s->reloc_count = 0;
675
            }
676
        }
677
      else if (strcmp (name, ".got") != 0
678
               && strcmp (name, ".sdata") != 0
679
               && strcmp (name, ".sdata2") != 0
680
               && strcmp (name, ".dynbss") != 0
681
               && strcmp (name, ".dynsbss") != 0)
682
        {
683
          /* It's not one of our sections, so don't allocate space.  */
684
          continue;
685
        }
686
 
687
      if (s->size == 0)
688
        {
689
          /* If we don't need this section, strip it from the
690
             output file.  This is mostly to handle .rela.bss and
691
             .rela.plt.  We must create both sections in
692
             create_dynamic_sections, because they must be created
693
             before the linker maps input sections to output
694
             sections.  The linker does that before
695
             adjust_dynamic_symbol is called, and it is that
696
             function which decides whether anything needs to go
697
             into these sections.  */
698
          s->flags |= SEC_EXCLUDE;
699
          continue;
700
        }
701
 
702
      if ((s->flags & SEC_HAS_CONTENTS) == 0)
703
        continue;
704
 
705
      /* Allocate memory for the section contents.  */
706
      s->contents = bfd_zalloc (dynobj, s->size);
707
      if (s->contents == NULL)
708
        return FALSE;
709
    }
710
 
711
  if (elf_hash_table (info)->dynamic_sections_created)
712
    {
713
      /* Add some entries to the .dynamic section.  We fill in the
714
         values later, in i370_elf_finish_dynamic_sections, but we
715
         must add the entries now so that we get the correct size for
716
         the .dynamic section.  The DT_DEBUG entry is filled in by the
717
         dynamic linker and used by the debugger.  */
718
#define add_dynamic_entry(TAG, VAL) \
719
  _bfd_elf_add_dynamic_entry (info, TAG, VAL)
720
 
721
      if (!info->shared)
722
        {
723
          if (!add_dynamic_entry (DT_DEBUG, 0))
724
            return FALSE;
725
        }
726
 
727
      if (plt)
728
        {
729
          if (!add_dynamic_entry (DT_PLTGOT, 0)
730
              || !add_dynamic_entry (DT_PLTRELSZ, 0)
731
              || !add_dynamic_entry (DT_PLTREL, DT_RELA)
732
              || !add_dynamic_entry (DT_JMPREL, 0))
733
            return FALSE;
734
        }
735
 
736
      if (relocs)
737
        {
738
          if (!add_dynamic_entry (DT_RELA, 0)
739
              || !add_dynamic_entry (DT_RELASZ, 0)
740
              || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
741
            return FALSE;
742
        }
743
 
744
      if (reltext)
745
        {
746
          if (!add_dynamic_entry (DT_TEXTREL, 0))
747
            return FALSE;
748
          info->flags |= DF_TEXTREL;
749
        }
750
    }
751
#undef add_dynamic_entry
752
 
753
  /* If we are generating a shared library, we generate a section
754
     symbol for each output section.  These are local symbols, which
755
     means that they must come first in the dynamic symbol table.
756
     That means we must increment the dynamic symbol index of every
757
     other dynamic symbol.
758
 
759
     FIXME: We assume that there will never be relocations to
760
     locations in linker-created sections that do not have
761
     externally-visible names. Instead, we should work out precisely
762
     which sections relocations are targeted at.  */
763
  if (info->shared)
764
    {
765
      int c;
766
 
767
      for (c = 0, s = output_bfd->sections; s != NULL; s = s->next)
768
        {
769
          if ((s->flags & SEC_LINKER_CREATED) != 0
770
              || (s->flags & SEC_ALLOC) == 0)
771
            {
772
              elf_section_data (s)->dynindx = -1;
773
              continue;
774
            }
775
 
776
          /* These symbols will have no names, so we don't need to
777
             fiddle with dynstr_index.  */
778
 
779
          elf_section_data (s)->dynindx = c + 1;
780
 
781
          c++;
782
        }
783
 
784
      elf_link_hash_traverse (elf_hash_table (info),
785
                              i370_elf_adjust_dynindx, & c);
786
      elf_hash_table (info)->dynsymcount += c;
787
    }
788
 
789
  return TRUE;
790
}
791
 
792
/* Look through the relocs for a section during the first phase, and
793
   allocate space in the global offset table or procedure linkage
794
   table.  */
795
/* XXX hack alert bogus This routine is mostly all junk and almost
796
   certainly does the wrong thing.  Its here simply because it does
797
   just enough to allow glibc-2.1 ld.so to compile & link.  */
798
 
799
static bfd_boolean
800
i370_elf_check_relocs (bfd *abfd,
801
                       struct bfd_link_info *info,
802
                       asection *sec,
803
                       const Elf_Internal_Rela *relocs)
804
{
805
  bfd *dynobj;
806
  Elf_Internal_Shdr *symtab_hdr;
807
  struct elf_link_hash_entry **sym_hashes;
808
  const Elf_Internal_Rela *rel;
809
  const Elf_Internal_Rela *rel_end;
810
  bfd_vma *local_got_offsets;
811
  asection *sreloc;
812
 
813
  if (info->relocatable)
814
    return TRUE;
815
 
816
#ifdef DEBUG
817
  _bfd_error_handler ("i370_elf_check_relocs called for section %A in %B",
818
                      sec, abfd);
819
#endif
820
 
821
  dynobj = elf_hash_table (info)->dynobj;
822
  symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
823
  sym_hashes = elf_sym_hashes (abfd);
824
  local_got_offsets = elf_local_got_offsets (abfd);
825
 
826
  sreloc = NULL;
827
 
828
  rel_end = relocs + sec->reloc_count;
829
  for (rel = relocs; rel < rel_end; rel++)
830
    {
831
      unsigned long r_symndx;
832
      struct elf_link_hash_entry *h;
833
 
834
      r_symndx = ELF32_R_SYM (rel->r_info);
835
      if (r_symndx < symtab_hdr->sh_info)
836
        h = NULL;
837
      else
838
        {
839
          h = sym_hashes[r_symndx - symtab_hdr->sh_info];
840
          while (h->root.type == bfd_link_hash_indirect
841
                 || h->root.type == bfd_link_hash_warning)
842
            h = (struct elf_link_hash_entry *) h->root.u.i.link;
843
        }
844
 
845
      if (info->shared)
846
        {
847
#ifdef DEBUG
848
          fprintf (stderr,
849
                   "i370_elf_check_relocs needs to create relocation for %s\n",
850
                   (h && h->root.root.string)
851
                   ? h->root.root.string : "<unknown>");
852
#endif
853
          if (sreloc == NULL)
854
            {
855 225 jeremybenn
              sreloc = _bfd_elf_make_dynamic_reloc_section
856
                (sec, dynobj, 2, abfd, /*rela?*/ TRUE);
857 24 jeremybenn
 
858 225 jeremybenn
              if (sreloc == NULL)
859 24 jeremybenn
                return FALSE;
860
            }
861
 
862
          sreloc->size += sizeof (Elf32_External_Rela);
863
 
864
          /* FIXME: We should here do what the m68k and i386
865
             backends do: if the reloc is pc-relative, record it
866
             in case it turns out that the reloc is unnecessary
867
             because the symbol is forced local by versioning or
868
             we are linking with -Bdynamic.  Fortunately this
869
             case is not frequent.  */
870
        }
871
    }
872
 
873
  return TRUE;
874
}
875
 
876
/* Finish up the dynamic sections.  */
877
/* XXX hack alert bogus This routine is mostly all junk and almost
878
   certainly does the wrong thing.  Its here simply because it does
879
   just enough to allow glibc-2.1 ld.so to compile & link.  */
880
 
881
static bfd_boolean
882
i370_elf_finish_dynamic_sections (bfd *output_bfd,
883
                                  struct bfd_link_info *info)
884
{
885
  asection *sdyn;
886
  bfd *dynobj = elf_hash_table (info)->dynobj;
887
  asection *sgot = bfd_get_section_by_name (dynobj, ".got");
888
 
889
#ifdef DEBUG
890
  fprintf (stderr, "i370_elf_finish_dynamic_sections called\n");
891
#endif
892
 
893
  sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
894
 
895
  if (elf_hash_table (info)->dynamic_sections_created)
896
    {
897
      asection *splt;
898
      Elf32_External_Dyn *dyncon, *dynconend;
899
 
900
      splt = bfd_get_section_by_name (dynobj, ".plt");
901
      BFD_ASSERT (splt != NULL && sdyn != NULL);
902
 
903
      dyncon = (Elf32_External_Dyn *) sdyn->contents;
904
      dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
905
      for (; dyncon < dynconend; dyncon++)
906
        {
907
          Elf_Internal_Dyn dyn;
908
          const char *name;
909
          bfd_boolean size;
910
 
911
          bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
912
 
913
          switch (dyn.d_tag)
914
            {
915
            case DT_PLTGOT:   name = ".plt";      size = FALSE; break;
916
            case DT_PLTRELSZ: name = ".rela.plt"; size = TRUE;  break;
917
            case DT_JMPREL:   name = ".rela.plt"; size = FALSE; break;
918
            default:          name = NULL;        size = FALSE; break;
919
            }
920
 
921
          if (name != NULL)
922
            {
923
              asection *s;
924
 
925
              s = bfd_get_section_by_name (output_bfd, name);
926
              if (s == NULL)
927
                dyn.d_un.d_val = 0;
928
              else
929
                {
930
                  if (! size)
931
                    dyn.d_un.d_ptr = s->vma;
932
                  else
933
                    dyn.d_un.d_val = s->size;
934
                }
935
              bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
936
            }
937
        }
938
    }
939
 
940
  if (sgot && sgot->size != 0)
941
    {
942
      unsigned char *contents = sgot->contents;
943
 
944
      if (sdyn == NULL)
945
        bfd_put_32 (output_bfd, (bfd_vma) 0, contents);
946
      else
947
        bfd_put_32 (output_bfd,
948
                    sdyn->output_section->vma + sdyn->output_offset,
949
                    contents);
950
 
951
      elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
952
    }
953
 
954
  if (info->shared)
955
    {
956
      asection *sdynsym;
957
      asection *s;
958
      Elf_Internal_Sym sym;
959
      int maxdindx = 0;
960
 
961
      /* Set up the section symbols for the output sections.  */
962
 
963
      sdynsym = bfd_get_section_by_name (dynobj, ".dynsym");
964
      BFD_ASSERT (sdynsym != NULL);
965
 
966
      sym.st_size = 0;
967
      sym.st_name = 0;
968
      sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION);
969
      sym.st_other = 0;
970
 
971
      for (s = output_bfd->sections; s != NULL; s = s->next)
972
        {
973
          int indx, dindx;
974
          Elf32_External_Sym *esym;
975
 
976
          sym.st_value = s->vma;
977
 
978
          indx = elf_section_data (s)->this_idx;
979
          dindx = elf_section_data (s)->dynindx;
980
          if (dindx != -1)
981
            {
982
              BFD_ASSERT(indx > 0);
983
              BFD_ASSERT(dindx > 0);
984
 
985
              if (dindx > maxdindx)
986
                maxdindx = dindx;
987
 
988
              sym.st_shndx = indx;
989
 
990
              esym = (Elf32_External_Sym *) sdynsym->contents + dindx;
991
              bfd_elf32_swap_symbol_out (output_bfd, &sym, esym, NULL);
992
            }
993
        }
994
 
995
      /* Set the sh_info field of the output .dynsym section to the
996
         index of the first global symbol.  */
997
      elf_section_data (sdynsym->output_section)->this_hdr.sh_info =
998
        maxdindx + 1;
999
    }
1000
 
1001
  return TRUE;
1002
}
1003
 
1004
/* The RELOCATE_SECTION function is called by the ELF backend linker
1005
   to handle the relocations for a section.
1006
 
1007
   The relocs are always passed as Rela structures; if the section
1008
   actually uses Rel structures, the r_addend field will always be
1009
   zero.
1010
 
1011
   This function is responsible for adjust the section contents as
1012
   necessary, and (if using Rela relocs and generating a
1013
   relocatable output file) adjusting the reloc addend as
1014
   necessary.
1015
 
1016
   This function does not have to worry about setting the reloc
1017
   address or the reloc symbol index.
1018
 
1019
   LOCAL_SYMS is a pointer to the swapped in local symbols.
1020
 
1021
   LOCAL_SECTIONS is an array giving the section in the input file
1022
   corresponding to the st_shndx field of each local symbol.
1023
 
1024
   The global hash table entry for the global symbols can be found
1025
   via elf_sym_hashes (input_bfd).
1026
 
1027
   When generating relocatable output, this function must handle
1028
   STB_LOCAL/STT_SECTION symbols specially.  The output symbol is
1029
   going to be the section symbol corresponding to the output
1030
   section, which means that the addend must be adjusted
1031
   accordingly.  */
1032
 
1033
static bfd_boolean
1034
i370_elf_relocate_section (bfd *output_bfd,
1035
                           struct bfd_link_info *info,
1036
                           bfd *input_bfd,
1037
                           asection *input_section,
1038
                           bfd_byte *contents,
1039
                           Elf_Internal_Rela *relocs,
1040
                           Elf_Internal_Sym *local_syms,
1041
                           asection **local_sections)
1042
{
1043
  Elf_Internal_Shdr *symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
1044
  struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (input_bfd);
1045
  Elf_Internal_Rela *rel = relocs;
1046
  Elf_Internal_Rela *relend = relocs + input_section->reloc_count;
1047
  asection *sreloc = NULL;
1048
  bfd_vma *local_got_offsets;
1049
  bfd_boolean ret = TRUE;
1050
 
1051
#ifdef DEBUG
1052
  _bfd_error_handler ("i370_elf_relocate_section called for %B section %A, %ld relocations%s",
1053
                      input_bfd, input_section,
1054
                      (long) input_section->reloc_count,
1055
                      (info->relocatable) ? " (relocatable)" : "");
1056
#endif
1057
 
1058
  if (!i370_elf_howto_table[ R_I370_ADDR31 ])
1059
    /* Initialize howto table if needed.  */
1060
    i370_elf_howto_init ();
1061
 
1062
  local_got_offsets = elf_local_got_offsets (input_bfd);
1063
 
1064
  for (; rel < relend; rel++)
1065
    {
1066
      enum i370_reloc_type r_type    = (enum i370_reloc_type) ELF32_R_TYPE (rel->r_info);
1067
      bfd_vma offset                 = rel->r_offset;
1068
      bfd_vma addend                 = rel->r_addend;
1069
      bfd_reloc_status_type r        = bfd_reloc_other;
1070
      Elf_Internal_Sym *sym          = NULL;
1071
      asection *sec                  = NULL;
1072
      struct elf_link_hash_entry * h = NULL;
1073
      const char *sym_name           = NULL;
1074
      reloc_howto_type *howto;
1075
      unsigned long r_symndx;
1076
      bfd_vma relocation;
1077
 
1078
      /* Unknown relocation handling.  */
1079
      if ((unsigned) r_type >= (unsigned) R_I370_max
1080
          || !i370_elf_howto_table[(int)r_type])
1081
        {
1082
          (*_bfd_error_handler) ("%B: unknown relocation type %d",
1083
                                 input_bfd,
1084
                                 (int) r_type);
1085
 
1086
          bfd_set_error (bfd_error_bad_value);
1087
          ret = FALSE;
1088
          continue;
1089
        }
1090
 
1091
      howto = i370_elf_howto_table[(int) r_type];
1092
      r_symndx = ELF32_R_SYM (rel->r_info);
1093
      relocation = 0;
1094
 
1095
      if (r_symndx < symtab_hdr->sh_info)
1096
        {
1097
          sym = local_syms + r_symndx;
1098
          sec = local_sections[r_symndx];
1099
          sym_name = "<local symbol>";
1100
 
1101
          relocation = _bfd_elf_rela_local_sym (output_bfd, sym, & sec, rel);
1102
          addend = rel->r_addend;
1103
        }
1104
      else
1105
        {
1106
          h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1107
          while (h->root.type == bfd_link_hash_indirect
1108
                 || h->root.type == bfd_link_hash_warning)
1109
            h = (struct elf_link_hash_entry *) h->root.u.i.link;
1110
          sym_name = h->root.root.string;
1111
          if (h->root.type == bfd_link_hash_defined
1112
              || h->root.type == bfd_link_hash_defweak)
1113
            {
1114
              sec = h->root.u.def.section;
1115
              if (info->shared
1116
                  && ((! info->symbolic && h->dynindx != -1)
1117
                      || !h->def_regular)
1118
                  && (input_section->flags & SEC_ALLOC) != 0
1119
                  && (r_type == R_I370_ADDR31
1120
                      || r_type == R_I370_COPY
1121
                      || r_type == R_I370_ADDR16
1122
                      || r_type == R_I370_RELATIVE))
1123
                /* In these cases, we don't need the relocation
1124
                   value.  We check specially because in some
1125
                   obscure cases sec->output_section will be NULL.  */
1126
                ;
1127
              else
1128
                relocation = (h->root.u.def.value
1129
                              + sec->output_section->vma
1130
                              + sec->output_offset);
1131
            }
1132
          else if (h->root.type == bfd_link_hash_undefweak)
1133
            ;
1134
          else if (info->unresolved_syms_in_objects == RM_IGNORE
1135
                   && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
1136
            ;
1137
          else if (!info->relocatable)
1138
            {
1139
              if ((*info->callbacks->undefined_symbol)
1140
                  (info, h->root.root.string, input_bfd,
1141
                   input_section, rel->r_offset,
1142
                   (info->unresolved_syms_in_objects == RM_GENERATE_ERROR
1143
                    || ELF_ST_VISIBILITY (h->other))))
1144
                {
1145
                  ret = FALSE;
1146
                  continue;
1147
                }
1148
            }
1149
        }
1150
 
1151
      if (sec != NULL && elf_discarded_section (sec))
1152
        {
1153
          /* For relocs against symbols from removed linkonce sections,
1154
             or sections discarded by a linker script, we just want the
1155
             section contents zeroed.  Avoid any special processing.  */
1156
          _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
1157
          rel->r_info = 0;
1158
          rel->r_addend = 0;
1159
          continue;
1160
        }
1161
 
1162
      if (info->relocatable)
1163
        continue;
1164
 
1165
      switch ((int) r_type)
1166
        {
1167
        default:
1168
          (*_bfd_error_handler)
1169
            ("%B: unknown relocation type %d for symbol %s",
1170
             input_bfd, (int) r_type, sym_name);
1171
 
1172
          bfd_set_error (bfd_error_bad_value);
1173
          ret = FALSE;
1174
          continue;
1175
 
1176
        case (int) R_I370_NONE:
1177
          continue;
1178
 
1179
        /* Relocations that may need to be propagated if this is a shared
1180
           object.  */
1181
        case (int) R_I370_REL31:
1182
          /* If these relocations are not to a named symbol, they can be
1183
             handled right here, no need to bother the dynamic linker.  */
1184
          if (h == NULL
1185
              || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
1186
            break;
1187
        /* Fall through.  */
1188
 
1189
        /* Relocations that always need to be propagated if this is a shared
1190
           object.  */
1191
        case (int) R_I370_ADDR31:
1192
        case (int) R_I370_ADDR16:
1193
          if (info->shared
1194
              && r_symndx != 0)
1195
            {
1196
              Elf_Internal_Rela outrel;
1197
              bfd_byte *loc;
1198
              int skip;
1199
 
1200
#ifdef DEBUG
1201
              fprintf (stderr,
1202
                       "i370_elf_relocate_section needs to create relocation for %s\n",
1203
                       (h && h->root.root.string) ? h->root.root.string : "<unknown>");
1204
#endif
1205
 
1206
              /* When generating a shared object, these relocations
1207
                 are copied into the output file to be resolved at run
1208
                 time.  */
1209
 
1210
              if (sreloc == NULL)
1211
                {
1212 225 jeremybenn
                  sreloc = _bfd_elf_get_dynamic_reloc_section
1213
                    (input_bfd, input_section, /*rela?*/ TRUE);
1214
                  if (sreloc == NULL)
1215 24 jeremybenn
                    return FALSE;
1216
                }
1217
 
1218
              skip = 0;
1219
 
1220
              outrel.r_offset =
1221
                _bfd_elf_section_offset (output_bfd, info, input_section,
1222
                                         rel->r_offset);
1223
              if (outrel.r_offset == (bfd_vma) -1
1224
                  || outrel.r_offset == (bfd_vma) -2)
1225
                skip = (int) outrel.r_offset;
1226
              outrel.r_offset += (input_section->output_section->vma
1227
                                  + input_section->output_offset);
1228
 
1229
              if (skip)
1230
                memset (&outrel, 0, sizeof outrel);
1231
              /* h->dynindx may be -1 if this symbol was marked to
1232
                 become local.  */
1233
              else if (h != NULL
1234
                       && ((! info->symbolic && h->dynindx != -1)
1235
                           || !h->def_regular))
1236
                {
1237
                  BFD_ASSERT (h->dynindx != -1);
1238
                  outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
1239
                  outrel.r_addend = rel->r_addend;
1240
                }
1241
              else
1242
                {
1243
                  if (r_type == R_I370_ADDR31)
1244
                    {
1245
                      outrel.r_info = ELF32_R_INFO (0, R_I370_RELATIVE);
1246
                      outrel.r_addend = relocation + rel->r_addend;
1247
                    }
1248
                  else
1249
                    {
1250
                      long indx;
1251
 
1252
                      if (bfd_is_abs_section (sec))
1253
                        indx = 0;
1254
                      else if (sec == NULL || sec->owner == NULL)
1255
                        {
1256
                          bfd_set_error (bfd_error_bad_value);
1257
                          return FALSE;
1258
                        }
1259
                      else
1260
                        {
1261
                          asection *osec;
1262
 
1263
                          /* We are turning this relocation into one
1264
                             against a section symbol.  It would be
1265
                             proper to subtract the symbol's value,
1266
                             osec->vma, from the emitted reloc addend,
1267
                             but ld.so expects buggy relocs.  */
1268
                          osec = sec->output_section;
1269
                          indx = elf_section_data (osec)->dynindx;
1270
                          if (indx == 0)
1271
                            {
1272
                              struct elf_link_hash_table *htab;
1273
                              htab = elf_hash_table (info);
1274
                              osec = htab->text_index_section;
1275
                              indx = elf_section_data (osec)->dynindx;
1276
                            }
1277
                          BFD_ASSERT (indx != 0);
1278
#ifdef DEBUG
1279
                          if (indx <= 0)
1280
                            {
1281
                              printf ("indx=%ld section=%s flags=%08x name=%s\n",
1282
                                      indx, osec->name, osec->flags,
1283
                                      h->root.root.string);
1284
                            }
1285
#endif
1286
                        }
1287
 
1288
                      outrel.r_info = ELF32_R_INFO (indx, r_type);
1289
                      outrel.r_addend = relocation + rel->r_addend;
1290
                    }
1291
                }
1292
 
1293
              loc = sreloc->contents;
1294
              loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
1295
              bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1296
 
1297
              /* This reloc will be computed at runtime, so there's no
1298
                 need to do anything now, unless this is a RELATIVE
1299
                 reloc in an unallocated section.  */
1300
              if (skip == -1
1301
                  || (input_section->flags & SEC_ALLOC) != 0
1302
                  || ELF32_R_TYPE (outrel.r_info) != R_I370_RELATIVE)
1303
                continue;
1304
            }
1305
          break;
1306
 
1307
        case (int) R_I370_COPY:
1308
        case (int) R_I370_RELATIVE:
1309
          (*_bfd_error_handler)
1310
            ("%B: Relocation %s is not yet supported for symbol %s.",
1311
             input_bfd,
1312
             i370_elf_howto_table[(int) r_type]->name,
1313
             sym_name);
1314
 
1315
          bfd_set_error (bfd_error_invalid_operation);
1316
          ret = FALSE;
1317
          continue;
1318
        }
1319
 
1320
#ifdef DEBUG
1321
      fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, offset = %ld, addend = %ld\n",
1322
               howto->name,
1323
               (int)r_type,
1324
               sym_name,
1325
               r_symndx,
1326
               (long) offset,
1327
               (long) addend);
1328
#endif
1329
 
1330
      r = _bfd_final_link_relocate (howto, input_bfd, input_section, contents,
1331
                                    offset, relocation, addend);
1332
 
1333
      if (r != bfd_reloc_ok)
1334
        {
1335
          ret = FALSE;
1336
          switch (r)
1337
            {
1338
            default:
1339
              break;
1340
 
1341
            case bfd_reloc_overflow:
1342
              {
1343
                const char *name;
1344
 
1345
                if (h != NULL)
1346
                  name = NULL;
1347
                else
1348
                  {
1349
                    name = bfd_elf_string_from_elf_section (input_bfd,
1350
                                                            symtab_hdr->sh_link,
1351
                                                            sym->st_name);
1352
                    if (name == NULL)
1353
                      break;
1354
 
1355
                    if (*name == '\0')
1356
                      name = bfd_section_name (input_bfd, sec);
1357
                  }
1358
 
1359
                (*info->callbacks->reloc_overflow) (info,
1360
                                                    (h ? &h->root : NULL),
1361
                                                    name,
1362
                                                    howto->name,
1363
                                                    (bfd_vma) 0,
1364
                                                    input_bfd,
1365
                                                    input_section,
1366
                                                    offset);
1367
              }
1368
              break;
1369
            }
1370
        }
1371
    }
1372
 
1373
#ifdef DEBUG
1374
  fprintf (stderr, "\n");
1375
#endif
1376
 
1377
  return ret;
1378
}
1379
 
1380
#define TARGET_BIG_SYM          bfd_elf32_i370_vec
1381
#define TARGET_BIG_NAME         "elf32-i370"
1382
#define ELF_ARCH                bfd_arch_i370
1383
#define ELF_MACHINE_CODE        EM_S370
1384
#ifdef EM_I370_OLD
1385
#define ELF_MACHINE_ALT1        EM_I370_OLD
1386
#endif
1387
#define ELF_MAXPAGESIZE         0x1000
1388
#define ELF_OSABI               ELFOSABI_LINUX
1389
 
1390
#define elf_info_to_howto       i370_elf_info_to_howto
1391
 
1392
#define elf_backend_plt_not_loaded 1
1393
#define elf_backend_rela_normal    1
1394
 
1395
#define bfd_elf32_bfd_reloc_type_lookup         i370_elf_reloc_type_lookup
1396
#define bfd_elf32_bfd_reloc_name_lookup i370_elf_reloc_name_lookup
1397
#define bfd_elf32_bfd_set_private_flags         i370_elf_set_private_flags
1398
#define bfd_elf32_bfd_merge_private_bfd_data    i370_elf_merge_private_bfd_data
1399
#define elf_backend_relocate_section            i370_elf_relocate_section
1400
 
1401
/* Dynamic loader support is mostly broken; just enough here to be able to
1402
   link glibc's ld.so without errors.  */
1403
#define elf_backend_create_dynamic_sections     i370_elf_create_dynamic_sections
1404
#define elf_backend_size_dynamic_sections       i370_elf_size_dynamic_sections
1405
#define elf_backend_init_index_section          _bfd_elf_init_1_index_section
1406
#define elf_backend_finish_dynamic_sections     i370_elf_finish_dynamic_sections
1407
#define elf_backend_fake_sections               i370_elf_fake_sections
1408
#define elf_backend_section_from_shdr           i370_elf_section_from_shdr
1409
#define elf_backend_adjust_dynamic_symbol       i370_elf_adjust_dynamic_symbol
1410
#define elf_backend_check_relocs                i370_elf_check_relocs
1411
#define elf_backend_post_process_headers        _bfd_elf_set_osabi
1412
 
1413
static int
1414
i370_noop (void)
1415
{
1416
  return 1;
1417
}
1418
 
1419
#define elf_backend_finish_dynamic_symbol \
1420
  (bfd_boolean (*) \
1421
     (bfd *, struct bfd_link_info *, struct elf_link_hash_entry *, \
1422
      Elf_Internal_Sym *)) i370_noop
1423
 
1424
#include "elf32-target.h"

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