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2007-05-15 H.J. Lu <hongjiu.lu@intel.com>
[deliverable/binutils-gdb.git] / bfd / elf32-i370.c
1 /* i370-specific support for 32-bit ELF
2 Copyright 1994, 1995, 1996, 1997, 1998, 2000, 2001, 2002, 2003, 2004,
3 2005, 2006, 2007 Free Software Foundation, Inc.
4 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 2 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 \f
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 \f
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 \f
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 \f
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 \f
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 \f
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 \f
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 const char *name;
856
857 name = (bfd_elf_string_from_elf_section
858 (abfd,
859 elf_elfheader (abfd)->e_shstrndx,
860 elf_section_data (sec)->rel_hdr.sh_name));
861 if (name == NULL)
862 return FALSE;
863
864 BFD_ASSERT (CONST_STRNEQ (name, ".rela")
865 && strcmp (bfd_get_section_name (abfd, sec), name + 5) == 0);
866
867 sreloc = bfd_get_section_by_name (dynobj, name);
868 if (sreloc == NULL)
869 {
870 flagword flags;
871
872 flags = (SEC_HAS_CONTENTS | SEC_READONLY
873 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
874 if ((sec->flags & SEC_ALLOC) != 0)
875 flags |= SEC_ALLOC | SEC_LOAD;
876 sreloc = bfd_make_section_with_flags (dynobj, name,
877 flags);
878 if (sreloc == NULL
879 || ! bfd_set_section_alignment (dynobj, sreloc, 2))
880 return FALSE;
881 }
882 }
883
884 sreloc->size += sizeof (Elf32_External_Rela);
885
886 /* FIXME: We should here do what the m68k and i386
887 backends do: if the reloc is pc-relative, record it
888 in case it turns out that the reloc is unnecessary
889 because the symbol is forced local by versioning or
890 we are linking with -Bdynamic. Fortunately this
891 case is not frequent. */
892 }
893 }
894
895 return TRUE;
896 }
897 \f
898 /* Finish up the dynamic sections. */
899 /* XXX hack alert bogus This routine is mostly all junk and almost
900 certainly does the wrong thing. Its here simply because it does
901 just enough to allow glibc-2.1 ld.so to compile & link. */
902
903 static bfd_boolean
904 i370_elf_finish_dynamic_sections (bfd *output_bfd,
905 struct bfd_link_info *info)
906 {
907 asection *sdyn;
908 bfd *dynobj = elf_hash_table (info)->dynobj;
909 asection *sgot = bfd_get_section_by_name (dynobj, ".got");
910
911 #ifdef DEBUG
912 fprintf (stderr, "i370_elf_finish_dynamic_sections called\n");
913 #endif
914
915 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
916
917 if (elf_hash_table (info)->dynamic_sections_created)
918 {
919 asection *splt;
920 Elf32_External_Dyn *dyncon, *dynconend;
921
922 splt = bfd_get_section_by_name (dynobj, ".plt");
923 BFD_ASSERT (splt != NULL && sdyn != NULL);
924
925 dyncon = (Elf32_External_Dyn *) sdyn->contents;
926 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
927 for (; dyncon < dynconend; dyncon++)
928 {
929 Elf_Internal_Dyn dyn;
930 const char *name;
931 bfd_boolean size;
932
933 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
934
935 switch (dyn.d_tag)
936 {
937 case DT_PLTGOT: name = ".plt"; size = FALSE; break;
938 case DT_PLTRELSZ: name = ".rela.plt"; size = TRUE; break;
939 case DT_JMPREL: name = ".rela.plt"; size = FALSE; break;
940 default: name = NULL; size = FALSE; break;
941 }
942
943 if (name != NULL)
944 {
945 asection *s;
946
947 s = bfd_get_section_by_name (output_bfd, name);
948 if (s == NULL)
949 dyn.d_un.d_val = 0;
950 else
951 {
952 if (! size)
953 dyn.d_un.d_ptr = s->vma;
954 else
955 dyn.d_un.d_val = s->size;
956 }
957 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
958 }
959 }
960 }
961
962 if (sgot && sgot->size != 0)
963 {
964 unsigned char *contents = sgot->contents;
965
966 if (sdyn == NULL)
967 bfd_put_32 (output_bfd, (bfd_vma) 0, contents);
968 else
969 bfd_put_32 (output_bfd,
970 sdyn->output_section->vma + sdyn->output_offset,
971 contents);
972
973 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
974 }
975
976 if (info->shared)
977 {
978 asection *sdynsym;
979 asection *s;
980 Elf_Internal_Sym sym;
981 int maxdindx = 0;
982
983 /* Set up the section symbols for the output sections. */
984
985 sdynsym = bfd_get_section_by_name (dynobj, ".dynsym");
986 BFD_ASSERT (sdynsym != NULL);
987
988 sym.st_size = 0;
989 sym.st_name = 0;
990 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION);
991 sym.st_other = 0;
992
993 for (s = output_bfd->sections; s != NULL; s = s->next)
994 {
995 int indx, dindx;
996 Elf32_External_Sym *esym;
997
998 sym.st_value = s->vma;
999
1000 indx = elf_section_data (s)->this_idx;
1001 dindx = elf_section_data (s)->dynindx;
1002 if (dindx != -1)
1003 {
1004 BFD_ASSERT(indx > 0);
1005 BFD_ASSERT(dindx > 0);
1006
1007 if (dindx > maxdindx)
1008 maxdindx = dindx;
1009
1010 sym.st_shndx = indx;
1011
1012 esym = (Elf32_External_Sym *) sdynsym->contents + dindx;
1013 bfd_elf32_swap_symbol_out (output_bfd, &sym, esym, NULL);
1014 }
1015 }
1016
1017 /* Set the sh_info field of the output .dynsym section to the
1018 index of the first global symbol. */
1019 elf_section_data (sdynsym->output_section)->this_hdr.sh_info =
1020 maxdindx + 1;
1021 }
1022
1023 return TRUE;
1024 }
1025 \f
1026 /* The RELOCATE_SECTION function is called by the ELF backend linker
1027 to handle the relocations for a section.
1028
1029 The relocs are always passed as Rela structures; if the section
1030 actually uses Rel structures, the r_addend field will always be
1031 zero.
1032
1033 This function is responsible for adjust the section contents as
1034 necessary, and (if using Rela relocs and generating a
1035 relocatable output file) adjusting the reloc addend as
1036 necessary.
1037
1038 This function does not have to worry about setting the reloc
1039 address or the reloc symbol index.
1040
1041 LOCAL_SYMS is a pointer to the swapped in local symbols.
1042
1043 LOCAL_SECTIONS is an array giving the section in the input file
1044 corresponding to the st_shndx field of each local symbol.
1045
1046 The global hash table entry for the global symbols can be found
1047 via elf_sym_hashes (input_bfd).
1048
1049 When generating relocatable output, this function must handle
1050 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
1051 going to be the section symbol corresponding to the output
1052 section, which means that the addend must be adjusted
1053 accordingly. */
1054
1055 static bfd_boolean
1056 i370_elf_relocate_section (bfd *output_bfd,
1057 struct bfd_link_info *info,
1058 bfd *input_bfd,
1059 asection *input_section,
1060 bfd_byte *contents,
1061 Elf_Internal_Rela *relocs,
1062 Elf_Internal_Sym *local_syms,
1063 asection **local_sections)
1064 {
1065 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
1066 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (input_bfd);
1067 bfd *dynobj = elf_hash_table (info)->dynobj;
1068 Elf_Internal_Rela *rel = relocs;
1069 Elf_Internal_Rela *relend = relocs + input_section->reloc_count;
1070 asection *sreloc = NULL;
1071 bfd_vma *local_got_offsets;
1072 bfd_boolean ret = TRUE;
1073
1074 #ifdef DEBUG
1075 _bfd_error_handler ("i370_elf_relocate_section called for %B section %A, %ld relocations%s",
1076 input_bfd, input_section,
1077 (long) input_section->reloc_count,
1078 (info->relocatable) ? " (relocatable)" : "");
1079 #endif
1080
1081 if (!i370_elf_howto_table[ R_I370_ADDR31 ])
1082 /* Initialize howto table if needed. */
1083 i370_elf_howto_init ();
1084
1085 local_got_offsets = elf_local_got_offsets (input_bfd);
1086
1087 for (; rel < relend; rel++)
1088 {
1089 enum i370_reloc_type r_type = (enum i370_reloc_type) ELF32_R_TYPE (rel->r_info);
1090 bfd_vma offset = rel->r_offset;
1091 bfd_vma addend = rel->r_addend;
1092 bfd_reloc_status_type r = bfd_reloc_other;
1093 Elf_Internal_Sym *sym = NULL;
1094 asection *sec = NULL;
1095 struct elf_link_hash_entry * h = NULL;
1096 const char *sym_name = NULL;
1097 reloc_howto_type *howto;
1098 unsigned long r_symndx;
1099 bfd_vma relocation;
1100
1101 /* Unknown relocation handling. */
1102 if ((unsigned) r_type >= (unsigned) R_I370_max
1103 || !i370_elf_howto_table[(int)r_type])
1104 {
1105 (*_bfd_error_handler) ("%B: unknown relocation type %d",
1106 input_bfd,
1107 (int) r_type);
1108
1109 bfd_set_error (bfd_error_bad_value);
1110 ret = FALSE;
1111 continue;
1112 }
1113
1114 howto = i370_elf_howto_table[(int) r_type];
1115 r_symndx = ELF32_R_SYM (rel->r_info);
1116 relocation = 0;
1117
1118 if (r_symndx < symtab_hdr->sh_info)
1119 {
1120 sym = local_syms + r_symndx;
1121 sec = local_sections[r_symndx];
1122 sym_name = "<local symbol>";
1123
1124 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, & sec, rel);
1125 addend = rel->r_addend;
1126 }
1127 else
1128 {
1129 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1130 while (h->root.type == bfd_link_hash_indirect
1131 || h->root.type == bfd_link_hash_warning)
1132 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1133 sym_name = h->root.root.string;
1134 if (h->root.type == bfd_link_hash_defined
1135 || h->root.type == bfd_link_hash_defweak)
1136 {
1137 sec = h->root.u.def.section;
1138 if (info->shared
1139 && ((! info->symbolic && h->dynindx != -1)
1140 || !h->def_regular)
1141 && (input_section->flags & SEC_ALLOC) != 0
1142 && (r_type == R_I370_ADDR31
1143 || r_type == R_I370_COPY
1144 || r_type == R_I370_ADDR16
1145 || r_type == R_I370_RELATIVE))
1146 /* In these cases, we don't need the relocation
1147 value. We check specially because in some
1148 obscure cases sec->output_section will be NULL. */
1149 ;
1150 else
1151 relocation = (h->root.u.def.value
1152 + sec->output_section->vma
1153 + sec->output_offset);
1154 }
1155 else if (h->root.type == bfd_link_hash_undefweak)
1156 ;
1157 else if (info->unresolved_syms_in_objects == RM_IGNORE
1158 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
1159 ;
1160 else if (!info->relocatable)
1161 {
1162 if ((*info->callbacks->undefined_symbol)
1163 (info, h->root.root.string, input_bfd,
1164 input_section, rel->r_offset,
1165 (info->unresolved_syms_in_objects == RM_GENERATE_ERROR
1166 || ELF_ST_VISIBILITY (h->other))))
1167 {
1168 ret = FALSE;
1169 continue;
1170 }
1171 }
1172 }
1173
1174 if (sec != NULL && elf_discarded_section (sec))
1175 {
1176 /* For relocs against symbols from removed linkonce sections,
1177 or sections discarded by a linker script, we just want the
1178 section contents zeroed. Avoid any special processing. */
1179 _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
1180 rel->r_info = 0;
1181 rel->r_addend = 0;
1182 continue;
1183 }
1184
1185 if (info->relocatable)
1186 continue;
1187
1188 switch ((int) r_type)
1189 {
1190 default:
1191 (*_bfd_error_handler)
1192 ("%B: unknown relocation type %d for symbol %s",
1193 input_bfd, (int) r_type, sym_name);
1194
1195 bfd_set_error (bfd_error_bad_value);
1196 ret = FALSE;
1197 continue;
1198
1199 case (int) R_I370_NONE:
1200 continue;
1201
1202 /* Relocations that may need to be propagated if this is a shared
1203 object. */
1204 case (int) R_I370_REL31:
1205 /* If these relocations are not to a named symbol, they can be
1206 handled right here, no need to bother the dynamic linker. */
1207 if (h == NULL
1208 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
1209 break;
1210 /* Fall through. */
1211
1212 /* Relocations that always need to be propagated if this is a shared
1213 object. */
1214 case (int) R_I370_ADDR31:
1215 case (int) R_I370_ADDR16:
1216 if (info->shared
1217 && r_symndx != 0)
1218 {
1219 Elf_Internal_Rela outrel;
1220 bfd_byte *loc;
1221 int skip;
1222
1223 #ifdef DEBUG
1224 fprintf (stderr,
1225 "i370_elf_relocate_section needs to create relocation for %s\n",
1226 (h && h->root.root.string) ? h->root.root.string : "<unknown>");
1227 #endif
1228
1229 /* When generating a shared object, these relocations
1230 are copied into the output file to be resolved at run
1231 time. */
1232
1233 if (sreloc == NULL)
1234 {
1235 const char *name;
1236
1237 name = (bfd_elf_string_from_elf_section
1238 (input_bfd,
1239 elf_elfheader (input_bfd)->e_shstrndx,
1240 elf_section_data (input_section)->rel_hdr.sh_name));
1241 if (name == NULL)
1242 return FALSE;
1243
1244 BFD_ASSERT (CONST_STRNEQ (name, ".rela")
1245 && strcmp (bfd_get_section_name (input_bfd,
1246 input_section),
1247 name + 5) == 0);
1248
1249 sreloc = bfd_get_section_by_name (dynobj, name);
1250 BFD_ASSERT (sreloc != NULL);
1251 }
1252
1253 skip = 0;
1254
1255 outrel.r_offset =
1256 _bfd_elf_section_offset (output_bfd, info, input_section,
1257 rel->r_offset);
1258 if (outrel.r_offset == (bfd_vma) -1
1259 || outrel.r_offset == (bfd_vma) -2)
1260 skip = (int) outrel.r_offset;
1261 outrel.r_offset += (input_section->output_section->vma
1262 + input_section->output_offset);
1263
1264 if (skip)
1265 memset (&outrel, 0, sizeof outrel);
1266 /* h->dynindx may be -1 if this symbol was marked to
1267 become local. */
1268 else if (h != NULL
1269 && ((! info->symbolic && h->dynindx != -1)
1270 || !h->def_regular))
1271 {
1272 BFD_ASSERT (h->dynindx != -1);
1273 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
1274 outrel.r_addend = rel->r_addend;
1275 }
1276 else
1277 {
1278 if (r_type == R_I370_ADDR31)
1279 {
1280 outrel.r_info = ELF32_R_INFO (0, R_I370_RELATIVE);
1281 outrel.r_addend = relocation + rel->r_addend;
1282 }
1283 else
1284 {
1285 long indx;
1286
1287 if (bfd_is_abs_section (sec))
1288 indx = 0;
1289 else if (sec == NULL || sec->owner == NULL)
1290 {
1291 bfd_set_error (bfd_error_bad_value);
1292 return FALSE;
1293 }
1294 else
1295 {
1296 asection *osec;
1297
1298 /* We are turning this relocation into one
1299 against a section symbol. It would be
1300 proper to subtract the symbol's value,
1301 osec->vma, from the emitted reloc addend,
1302 but ld.so expects buggy relocs. */
1303 osec = sec->output_section;
1304 indx = elf_section_data (osec)->dynindx;
1305 if (indx == 0)
1306 {
1307 struct elf_link_hash_table *htab;
1308 htab = elf_hash_table (info);
1309 osec = htab->text_index_section;
1310 indx = elf_section_data (osec)->dynindx;
1311 }
1312 BFD_ASSERT (indx != 0);
1313 #ifdef DEBUG
1314 if (indx <= 0)
1315 {
1316 printf ("indx=%ld section=%s flags=%08x name=%s\n",
1317 indx, osec->name, osec->flags,
1318 h->root.root.string);
1319 }
1320 #endif
1321 }
1322
1323 outrel.r_info = ELF32_R_INFO (indx, r_type);
1324 outrel.r_addend = relocation + rel->r_addend;
1325 }
1326 }
1327
1328 loc = sreloc->contents;
1329 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
1330 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1331
1332 /* This reloc will be computed at runtime, so there's no
1333 need to do anything now, unless this is a RELATIVE
1334 reloc in an unallocated section. */
1335 if (skip == -1
1336 || (input_section->flags & SEC_ALLOC) != 0
1337 || ELF32_R_TYPE (outrel.r_info) != R_I370_RELATIVE)
1338 continue;
1339 }
1340 break;
1341
1342 case (int) R_I370_COPY:
1343 case (int) R_I370_RELATIVE:
1344 (*_bfd_error_handler)
1345 ("%B: Relocation %s is not yet supported for symbol %s.",
1346 input_bfd,
1347 i370_elf_howto_table[(int) r_type]->name,
1348 sym_name);
1349
1350 bfd_set_error (bfd_error_invalid_operation);
1351 ret = FALSE;
1352 continue;
1353 }
1354
1355 #ifdef DEBUG
1356 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, offset = %ld, addend = %ld\n",
1357 howto->name,
1358 (int)r_type,
1359 sym_name,
1360 r_symndx,
1361 (long) offset,
1362 (long) addend);
1363 #endif
1364
1365 r = _bfd_final_link_relocate (howto, input_bfd, input_section, contents,
1366 offset, relocation, addend);
1367
1368 if (r != bfd_reloc_ok)
1369 {
1370 ret = FALSE;
1371 switch (r)
1372 {
1373 default:
1374 break;
1375
1376 case bfd_reloc_overflow:
1377 {
1378 const char *name;
1379
1380 if (h != NULL)
1381 name = NULL;
1382 else
1383 {
1384 name = bfd_elf_string_from_elf_section (input_bfd,
1385 symtab_hdr->sh_link,
1386 sym->st_name);
1387 if (name == NULL)
1388 break;
1389
1390 if (*name == '\0')
1391 name = bfd_section_name (input_bfd, sec);
1392 }
1393
1394 (*info->callbacks->reloc_overflow) (info,
1395 (h ? &h->root : NULL),
1396 name,
1397 howto->name,
1398 (bfd_vma) 0,
1399 input_bfd,
1400 input_section,
1401 offset);
1402 }
1403 break;
1404 }
1405 }
1406 }
1407
1408 #ifdef DEBUG
1409 fprintf (stderr, "\n");
1410 #endif
1411
1412 return ret;
1413 }
1414 \f
1415 #define TARGET_BIG_SYM bfd_elf32_i370_vec
1416 #define TARGET_BIG_NAME "elf32-i370"
1417 #define ELF_ARCH bfd_arch_i370
1418 #define ELF_MACHINE_CODE EM_S370
1419 #ifdef EM_I370_OLD
1420 #define ELF_MACHINE_ALT1 EM_I370_OLD
1421 #endif
1422 #define ELF_MAXPAGESIZE 0x1000
1423 #define ELF_OSABI ELFOSABI_LINUX
1424
1425 #define elf_info_to_howto i370_elf_info_to_howto
1426
1427 #define elf_backend_plt_not_loaded 1
1428 #define elf_backend_rela_normal 1
1429
1430 #define bfd_elf32_bfd_reloc_type_lookup i370_elf_reloc_type_lookup
1431 #define bfd_elf32_bfd_reloc_name_lookup i370_elf_reloc_name_lookup
1432 #define bfd_elf32_bfd_set_private_flags i370_elf_set_private_flags
1433 #define bfd_elf32_bfd_merge_private_bfd_data i370_elf_merge_private_bfd_data
1434 #define elf_backend_relocate_section i370_elf_relocate_section
1435
1436 /* Dynamic loader support is mostly broken; just enough here to be able to
1437 link glibc's ld.so without errors. */
1438 #define elf_backend_create_dynamic_sections i370_elf_create_dynamic_sections
1439 #define elf_backend_size_dynamic_sections i370_elf_size_dynamic_sections
1440 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
1441 #define elf_backend_finish_dynamic_sections i370_elf_finish_dynamic_sections
1442 #define elf_backend_fake_sections i370_elf_fake_sections
1443 #define elf_backend_section_from_shdr i370_elf_section_from_shdr
1444 #define elf_backend_adjust_dynamic_symbol i370_elf_adjust_dynamic_symbol
1445 #define elf_backend_check_relocs i370_elf_check_relocs
1446 #define elf_backend_post_process_headers _bfd_elf_set_osabi
1447
1448 static int
1449 i370_noop (void)
1450 {
1451 return 1;
1452 }
1453
1454 #define elf_backend_finish_dynamic_symbol \
1455 (bfd_boolean (*) \
1456 (bfd *, struct bfd_link_info *, struct elf_link_hash_entry *, \
1457 Elf_Internal_Sym *)) i370_noop
1458
1459 #include "elf32-target.h"
GDB Binutils - Deliverables
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