Annotation of src/external/gpl3/binutils.old/dist/bfd/cofflink.c, Revision 1.1.1.3
1.1 christos 1: /* COFF specific linker code.
1.1.1.3 ! christos 2: Copyright (C) 1994-2016 Free Software Foundation, Inc.
1.1 christos 3: Written by Ian Lance Taylor, Cygnus Support.
4:
5: This file is part of BFD, the Binary File Descriptor library.
6:
7: This program is free software; you can redistribute it and/or modify
8: it under the terms of the GNU General Public License as published by
9: the Free Software Foundation; either version 3 of the License, or
10: (at your option) any later version.
11:
12: This program is distributed in the hope that it will be useful,
13: but WITHOUT ANY WARRANTY; without even the implied warranty of
14: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15: GNU General Public License for more details.
16:
17: You should have received a copy of the GNU General Public License
18: along with this program; if not, write to the Free Software
19: Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
20: MA 02110-1301, USA. */
21:
22: /* This file contains the COFF backend linker code. */
23:
24: #include "sysdep.h"
25: #include "bfd.h"
26: #include "bfdlink.h"
27: #include "libbfd.h"
28: #include "coff/internal.h"
29: #include "libcoff.h"
30: #include "safe-ctype.h"
31:
1.1.1.2 christos 32: static bfd_boolean coff_link_add_object_symbols (bfd *, struct bfd_link_info *);
33: static bfd_boolean coff_link_check_archive_element
34: (bfd *, struct bfd_link_info *, struct bfd_link_hash_entry *, const char *,
35: bfd_boolean *);
36: static bfd_boolean coff_link_add_symbols (bfd *, struct bfd_link_info *);
1.1 christos 37:
38: /* Return TRUE if SYM is a weak, external symbol. */
39: #define IS_WEAK_EXTERNAL(abfd, sym) \
40: ((sym).n_sclass == C_WEAKEXT \
41: || (obj_pe (abfd) && (sym).n_sclass == C_NT_WEAK))
42:
43: /* Return TRUE if SYM is an external symbol. */
44: #define IS_EXTERNAL(abfd, sym) \
45: ((sym).n_sclass == C_EXT || IS_WEAK_EXTERNAL (abfd, sym))
46:
47: /* Define macros so that the ISFCN, et. al., macros work correctly.
48: These macros are defined in include/coff/internal.h in terms of
49: N_TMASK, etc. These definitions require a user to define local
50: variables with the appropriate names, and with values from the
51: coff_data (abfd) structure. */
52:
53: #define N_TMASK n_tmask
54: #define N_BTSHFT n_btshft
55: #define N_BTMASK n_btmask
56:
57: /* Create an entry in a COFF linker hash table. */
58:
59: struct bfd_hash_entry *
60: _bfd_coff_link_hash_newfunc (struct bfd_hash_entry *entry,
61: struct bfd_hash_table *table,
62: const char *string)
63: {
64: struct coff_link_hash_entry *ret = (struct coff_link_hash_entry *) entry;
65:
66: /* Allocate the structure if it has not already been allocated by a
67: subclass. */
68: if (ret == (struct coff_link_hash_entry *) NULL)
69: ret = ((struct coff_link_hash_entry *)
70: bfd_hash_allocate (table, sizeof (struct coff_link_hash_entry)));
71: if (ret == (struct coff_link_hash_entry *) NULL)
72: return (struct bfd_hash_entry *) ret;
73:
74: /* Call the allocation method of the superclass. */
75: ret = ((struct coff_link_hash_entry *)
76: _bfd_link_hash_newfunc ((struct bfd_hash_entry *) ret,
77: table, string));
78: if (ret != (struct coff_link_hash_entry *) NULL)
79: {
80: /* Set local fields. */
81: ret->indx = -1;
82: ret->type = T_NULL;
83: ret->symbol_class = C_NULL;
84: ret->numaux = 0;
85: ret->auxbfd = NULL;
86: ret->aux = NULL;
87: }
88:
89: return (struct bfd_hash_entry *) ret;
90: }
91:
92: /* Initialize a COFF linker hash table. */
93:
94: bfd_boolean
95: _bfd_coff_link_hash_table_init (struct coff_link_hash_table *table,
96: bfd *abfd,
97: struct bfd_hash_entry *(*newfunc) (struct bfd_hash_entry *,
98: struct bfd_hash_table *,
99: const char *),
100: unsigned int entsize)
101: {
102: memset (&table->stab_info, 0, sizeof (table->stab_info));
103: return _bfd_link_hash_table_init (&table->root, abfd, newfunc, entsize);
104: }
105:
106: /* Create a COFF linker hash table. */
107:
108: struct bfd_link_hash_table *
109: _bfd_coff_link_hash_table_create (bfd *abfd)
110: {
111: struct coff_link_hash_table *ret;
112: bfd_size_type amt = sizeof (struct coff_link_hash_table);
113:
114: ret = (struct coff_link_hash_table *) bfd_malloc (amt);
115: if (ret == NULL)
116: return NULL;
117:
118: if (! _bfd_coff_link_hash_table_init (ret, abfd,
119: _bfd_coff_link_hash_newfunc,
120: sizeof (struct coff_link_hash_entry)))
121: {
122: free (ret);
123: return (struct bfd_link_hash_table *) NULL;
124: }
125: return &ret->root;
126: }
127:
128: /* Create an entry in a COFF debug merge hash table. */
129:
130: struct bfd_hash_entry *
131: _bfd_coff_debug_merge_hash_newfunc (struct bfd_hash_entry *entry,
132: struct bfd_hash_table *table,
133: const char *string)
134: {
135: struct coff_debug_merge_hash_entry *ret =
136: (struct coff_debug_merge_hash_entry *) entry;
137:
138: /* Allocate the structure if it has not already been allocated by a
139: subclass. */
140: if (ret == (struct coff_debug_merge_hash_entry *) NULL)
141: ret = ((struct coff_debug_merge_hash_entry *)
142: bfd_hash_allocate (table,
143: sizeof (struct coff_debug_merge_hash_entry)));
144: if (ret == (struct coff_debug_merge_hash_entry *) NULL)
145: return (struct bfd_hash_entry *) ret;
146:
147: /* Call the allocation method of the superclass. */
148: ret = ((struct coff_debug_merge_hash_entry *)
149: bfd_hash_newfunc ((struct bfd_hash_entry *) ret, table, string));
150: if (ret != (struct coff_debug_merge_hash_entry *) NULL)
151: {
152: /* Set local fields. */
153: ret->types = NULL;
154: }
155:
156: return (struct bfd_hash_entry *) ret;
157: }
158:
159: /* Given a COFF BFD, add symbols to the global hash table as
160: appropriate. */
161:
162: bfd_boolean
163: _bfd_coff_link_add_symbols (bfd *abfd, struct bfd_link_info *info)
164: {
165: switch (bfd_get_format (abfd))
166: {
167: case bfd_object:
168: return coff_link_add_object_symbols (abfd, info);
169: case bfd_archive:
170: return _bfd_generic_link_add_archive_symbols
171: (abfd, info, coff_link_check_archive_element);
172: default:
173: bfd_set_error (bfd_error_wrong_format);
174: return FALSE;
175: }
176: }
177:
178: /* Add symbols from a COFF object file. */
179:
180: static bfd_boolean
181: coff_link_add_object_symbols (bfd *abfd, struct bfd_link_info *info)
182: {
183: if (! _bfd_coff_get_external_symbols (abfd))
184: return FALSE;
185: if (! coff_link_add_symbols (abfd, info))
186: return FALSE;
187:
188: if (! info->keep_memory
189: && ! _bfd_coff_free_symbols (abfd))
190: return FALSE;
191:
192: return TRUE;
193: }
194:
195: /* Check a single archive element to see if we need to include it in
196: the link. *PNEEDED is set according to whether this element is
197: needed in the link or not. This is called via
198: _bfd_generic_link_add_archive_symbols. */
199:
200: static bfd_boolean
201: coff_link_check_archive_element (bfd *abfd,
202: struct bfd_link_info *info,
1.1.1.2 christos 203: struct bfd_link_hash_entry *h,
204: const char *name,
1.1 christos 205: bfd_boolean *pneeded)
206: {
1.1.1.2 christos 207: *pneeded = FALSE;
1.1 christos 208:
1.1.1.2 christos 209: /* We are only interested in symbols that are currently undefined.
210: If a symbol is currently known to be common, COFF linkers do not
211: bring in an object file which defines it. */
212: if (h->type != bfd_link_hash_undefined)
213: return TRUE;
1.1 christos 214:
1.1.1.3 ! christos 215: /* Include this element? */
1.1.1.2 christos 216: if (!(*info->callbacks->add_archive_element) (info, abfd, name, &abfd))
1.1.1.3 ! christos 217: return TRUE;
1.1.1.2 christos 218: *pneeded = TRUE;
1.1 christos 219:
1.1.1.2 christos 220: return coff_link_add_object_symbols (abfd, info);
1.1 christos 221: }
222:
223: /* Add all the symbols from an object file to the hash table. */
224:
225: static bfd_boolean
226: coff_link_add_symbols (bfd *abfd,
227: struct bfd_link_info *info)
228: {
229: unsigned int n_tmask = coff_data (abfd)->local_n_tmask;
230: unsigned int n_btshft = coff_data (abfd)->local_n_btshft;
231: unsigned int n_btmask = coff_data (abfd)->local_n_btmask;
232: bfd_boolean keep_syms;
233: bfd_boolean default_copy;
234: bfd_size_type symcount;
235: struct coff_link_hash_entry **sym_hash;
236: bfd_size_type symesz;
237: bfd_byte *esym;
238: bfd_byte *esym_end;
239: bfd_size_type amt;
240:
241: symcount = obj_raw_syment_count (abfd);
242:
243: if (symcount == 0)
244: return TRUE; /* Nothing to do. */
245:
246: /* Keep the symbols during this function, in case the linker needs
247: to read the generic symbols in order to report an error message. */
248: keep_syms = obj_coff_keep_syms (abfd);
249: obj_coff_keep_syms (abfd) = TRUE;
250:
251: if (info->keep_memory)
252: default_copy = FALSE;
253: else
254: default_copy = TRUE;
255:
256: /* We keep a list of the linker hash table entries that correspond
257: to particular symbols. */
258: amt = symcount * sizeof (struct coff_link_hash_entry *);
259: sym_hash = (struct coff_link_hash_entry **) bfd_zalloc (abfd, amt);
260: if (sym_hash == NULL)
261: goto error_return;
262: obj_coff_sym_hashes (abfd) = sym_hash;
263:
264: symesz = bfd_coff_symesz (abfd);
265: BFD_ASSERT (symesz == bfd_coff_auxesz (abfd));
266: esym = (bfd_byte *) obj_coff_external_syms (abfd);
267: esym_end = esym + symcount * symesz;
268: while (esym < esym_end)
269: {
270: struct internal_syment sym;
271: enum coff_symbol_classification classification;
272: bfd_boolean copy;
273:
274: bfd_coff_swap_sym_in (abfd, esym, &sym);
275:
276: classification = bfd_coff_classify_symbol (abfd, &sym);
277: if (classification != COFF_SYMBOL_LOCAL)
278: {
279: const char *name;
280: char buf[SYMNMLEN + 1];
281: flagword flags;
282: asection *section;
283: bfd_vma value;
284: bfd_boolean addit;
285:
286: /* This symbol is externally visible. */
287:
288: name = _bfd_coff_internal_syment_name (abfd, &sym, buf);
289: if (name == NULL)
290: goto error_return;
291:
292: /* We must copy the name into memory if we got it from the
293: syment itself, rather than the string table. */
294: copy = default_copy;
295: if (sym._n._n_n._n_zeroes != 0
296: || sym._n._n_n._n_offset == 0)
297: copy = TRUE;
298:
299: value = sym.n_value;
300:
301: switch (classification)
302: {
303: default:
304: abort ();
305:
306: case COFF_SYMBOL_GLOBAL:
307: flags = BSF_EXPORT | BSF_GLOBAL;
308: section = coff_section_from_bfd_index (abfd, sym.n_scnum);
309: if (! obj_pe (abfd))
310: value -= section->vma;
311: break;
312:
313: case COFF_SYMBOL_UNDEFINED:
314: flags = 0;
315: section = bfd_und_section_ptr;
316: break;
317:
318: case COFF_SYMBOL_COMMON:
319: flags = BSF_GLOBAL;
320: section = bfd_com_section_ptr;
321: break;
322:
323: case COFF_SYMBOL_PE_SECTION:
324: flags = BSF_SECTION_SYM | BSF_GLOBAL;
325: section = coff_section_from_bfd_index (abfd, sym.n_scnum);
326: break;
327: }
328:
329: if (IS_WEAK_EXTERNAL (abfd, sym))
330: flags = BSF_WEAK;
331:
332: addit = TRUE;
333:
334: /* In the PE format, section symbols actually refer to the
335: start of the output section. We handle them specially
336: here. */
337: if (obj_pe (abfd) && (flags & BSF_SECTION_SYM) != 0)
338: {
339: *sym_hash = coff_link_hash_lookup (coff_hash_table (info),
340: name, FALSE, copy, FALSE);
341: if (*sym_hash != NULL)
342: {
343: if (((*sym_hash)->coff_link_hash_flags
344: & COFF_LINK_HASH_PE_SECTION_SYMBOL) == 0
345: && (*sym_hash)->root.type != bfd_link_hash_undefined
346: && (*sym_hash)->root.type != bfd_link_hash_undefweak)
347: (*_bfd_error_handler)
348: ("Warning: symbol `%s' is both section and non-section",
349: name);
350:
351: addit = FALSE;
352: }
353: }
354:
355: /* The Microsoft Visual C compiler does string pooling by
356: hashing the constants to an internal symbol name, and
357: relying on the linker comdat support to discard
358: duplicate names. However, if one string is a literal and
359: one is a data initializer, one will end up in the .data
360: section and one will end up in the .rdata section. The
361: Microsoft linker will combine them into the .data
362: section, which seems to be wrong since it might cause the
363: literal to change.
364:
365: As long as there are no external references to the
366: symbols, which there shouldn't be, we can treat the .data
367: and .rdata instances as separate symbols. The comdat
368: code in the linker will do the appropriate merging. Here
369: we avoid getting a multiple definition error for one of
370: these special symbols.
371:
372: FIXME: I don't think this will work in the case where
373: there are two object files which use the constants as a
374: literal and two object files which use it as a data
375: initializer. One or the other of the second object files
376: is going to wind up with an inappropriate reference. */
377: if (obj_pe (abfd)
378: && (classification == COFF_SYMBOL_GLOBAL
379: || classification == COFF_SYMBOL_PE_SECTION)
380: && coff_section_data (abfd, section) != NULL
381: && coff_section_data (abfd, section)->comdat != NULL
382: && CONST_STRNEQ (name, "??_")
383: && strcmp (name, coff_section_data (abfd, section)->comdat->name) == 0)
384: {
385: if (*sym_hash == NULL)
386: *sym_hash = coff_link_hash_lookup (coff_hash_table (info),
387: name, FALSE, copy, FALSE);
388: if (*sym_hash != NULL
389: && (*sym_hash)->root.type == bfd_link_hash_defined
390: && coff_section_data (abfd, (*sym_hash)->root.u.def.section)->comdat != NULL
391: && strcmp (coff_section_data (abfd, (*sym_hash)->root.u.def.section)->comdat->name,
392: coff_section_data (abfd, section)->comdat->name) == 0)
393: addit = FALSE;
394: }
395:
396: if (addit)
397: {
398: if (! (bfd_coff_link_add_one_symbol
399: (info, abfd, name, flags, section, value,
400: (const char *) NULL, copy, FALSE,
401: (struct bfd_link_hash_entry **) sym_hash)))
402: goto error_return;
403: }
404:
405: if (obj_pe (abfd) && (flags & BSF_SECTION_SYM) != 0)
406: (*sym_hash)->coff_link_hash_flags |=
407: COFF_LINK_HASH_PE_SECTION_SYMBOL;
408:
409: /* Limit the alignment of a common symbol to the possible
410: alignment of a section. There is no point to permitting
411: a higher alignment for a common symbol: we can not
412: guarantee it, and it may cause us to allocate extra space
413: in the common section. */
414: if (section == bfd_com_section_ptr
415: && (*sym_hash)->root.type == bfd_link_hash_common
416: && ((*sym_hash)->root.u.c.p->alignment_power
417: > bfd_coff_default_section_alignment_power (abfd)))
418: (*sym_hash)->root.u.c.p->alignment_power
419: = bfd_coff_default_section_alignment_power (abfd);
420:
421: if (bfd_get_flavour (info->output_bfd) == bfd_get_flavour (abfd))
422: {
423: /* If we don't have any symbol information currently in
424: the hash table, or if we are looking at a symbol
425: definition, then update the symbol class and type in
426: the hash table. */
427: if (((*sym_hash)->symbol_class == C_NULL
428: && (*sym_hash)->type == T_NULL)
429: || sym.n_scnum != 0
430: || (sym.n_value != 0
431: && (*sym_hash)->root.type != bfd_link_hash_defined
432: && (*sym_hash)->root.type != bfd_link_hash_defweak))
433: {
434: (*sym_hash)->symbol_class = sym.n_sclass;
435: if (sym.n_type != T_NULL)
436: {
437: /* We want to warn if the type changed, but not
438: if it changed from an unspecified type.
439: Testing the whole type byte may work, but the
440: change from (e.g.) a function of unspecified
441: type to function of known type also wants to
442: skip the warning. */
443: if ((*sym_hash)->type != T_NULL
444: && (*sym_hash)->type != sym.n_type
445: && !(DTYPE ((*sym_hash)->type) == DTYPE (sym.n_type)
446: && (BTYPE ((*sym_hash)->type) == T_NULL
447: || BTYPE (sym.n_type) == T_NULL)))
448: (*_bfd_error_handler)
449: (_("Warning: type of symbol `%s' changed from %d to %d in %B"),
450: abfd, name, (*sym_hash)->type, sym.n_type);
451:
452: /* We don't want to change from a meaningful
453: base type to a null one, but if we know
454: nothing, take what little we might now know. */
455: if (BTYPE (sym.n_type) != T_NULL
456: || (*sym_hash)->type == T_NULL)
457: (*sym_hash)->type = sym.n_type;
458: }
459: (*sym_hash)->auxbfd = abfd;
460: if (sym.n_numaux != 0)
461: {
462: union internal_auxent *alloc;
463: unsigned int i;
464: bfd_byte *eaux;
465: union internal_auxent *iaux;
466:
467: (*sym_hash)->numaux = sym.n_numaux;
468: alloc = ((union internal_auxent *)
469: bfd_hash_allocate (&info->hash->table,
470: (sym.n_numaux
471: * sizeof (*alloc))));
472: if (alloc == NULL)
473: goto error_return;
474: for (i = 0, eaux = esym + symesz, iaux = alloc;
475: i < sym.n_numaux;
476: i++, eaux += symesz, iaux++)
477: bfd_coff_swap_aux_in (abfd, eaux, sym.n_type,
478: sym.n_sclass, (int) i,
479: sym.n_numaux, iaux);
480: (*sym_hash)->aux = alloc;
481: }
482: }
483: }
484:
485: if (classification == COFF_SYMBOL_PE_SECTION
486: && (*sym_hash)->numaux != 0)
487: {
488: /* Some PE sections (such as .bss) have a zero size in
489: the section header, but a non-zero size in the AUX
490: record. Correct that here.
491:
492: FIXME: This is not at all the right place to do this.
493: For example, it won't help objdump. This needs to be
494: done when we swap in the section header. */
495: BFD_ASSERT ((*sym_hash)->numaux == 1);
496: if (section->size == 0)
497: section->size = (*sym_hash)->aux[0].x_scn.x_scnlen;
498:
499: /* FIXME: We could test whether the section sizes
500: matches the size in the aux entry, but apparently
501: that sometimes fails unexpectedly. */
502: }
503: }
504:
505: esym += (sym.n_numaux + 1) * symesz;
506: sym_hash += sym.n_numaux + 1;
507: }
508:
509: /* If this is a non-traditional, non-relocatable link, try to
510: optimize the handling of any .stab/.stabstr sections. */
1.1.1.2 christos 511: if (! bfd_link_relocatable (info)
1.1 christos 512: && ! info->traditional_format
513: && bfd_get_flavour (info->output_bfd) == bfd_get_flavour (abfd)
514: && (info->strip != strip_all && info->strip != strip_debugger))
515: {
516: asection *stabstr;
517:
518: stabstr = bfd_get_section_by_name (abfd, ".stabstr");
519:
520: if (stabstr != NULL)
521: {
522: bfd_size_type string_offset = 0;
523: asection *stab;
1.1.1.2 christos 524:
1.1 christos 525: for (stab = abfd->sections; stab; stab = stab->next)
526: if (CONST_STRNEQ (stab->name, ".stab")
527: && (!stab->name[5]
528: || (stab->name[5] == '.' && ISDIGIT (stab->name[6]))))
529: {
530: struct coff_link_hash_table *table;
531: struct coff_section_tdata *secdata
532: = coff_section_data (abfd, stab);
1.1.1.2 christos 533:
1.1 christos 534: if (secdata == NULL)
535: {
536: amt = sizeof (struct coff_section_tdata);
537: stab->used_by_bfd = bfd_zalloc (abfd, amt);
538: if (stab->used_by_bfd == NULL)
539: goto error_return;
540: secdata = coff_section_data (abfd, stab);
541: }
542:
543: table = coff_hash_table (info);
544:
545: if (! _bfd_link_section_stabs (abfd, &table->stab_info,
546: stab, stabstr,
547: &secdata->stab_info,
548: &string_offset))
549: goto error_return;
550: }
551: }
552: }
553:
554: obj_coff_keep_syms (abfd) = keep_syms;
555:
556: return TRUE;
557:
558: error_return:
559: obj_coff_keep_syms (abfd) = keep_syms;
560: return FALSE;
561: }
562:
563: /* Do the final link step. */
564:
565: bfd_boolean
566: _bfd_coff_final_link (bfd *abfd,
567: struct bfd_link_info *info)
568: {
569: bfd_size_type symesz;
570: struct coff_final_link_info flaginfo;
571: bfd_boolean debug_merge_allocated;
572: bfd_boolean long_section_names;
573: asection *o;
574: struct bfd_link_order *p;
575: bfd_size_type max_sym_count;
576: bfd_size_type max_lineno_count;
577: bfd_size_type max_reloc_count;
578: bfd_size_type max_output_reloc_count;
579: bfd_size_type max_contents_size;
580: file_ptr rel_filepos;
581: unsigned int relsz;
582: file_ptr line_filepos;
583: unsigned int linesz;
584: bfd *sub;
585: bfd_byte *external_relocs = NULL;
586: char strbuf[STRING_SIZE_SIZE];
587: bfd_size_type amt;
588:
589: symesz = bfd_coff_symesz (abfd);
590:
591: flaginfo.info = info;
592: flaginfo.output_bfd = abfd;
593: flaginfo.strtab = NULL;
594: flaginfo.section_info = NULL;
595: flaginfo.last_file_index = -1;
596: flaginfo.last_bf_index = -1;
597: flaginfo.internal_syms = NULL;
598: flaginfo.sec_ptrs = NULL;
599: flaginfo.sym_indices = NULL;
600: flaginfo.outsyms = NULL;
601: flaginfo.linenos = NULL;
602: flaginfo.contents = NULL;
603: flaginfo.external_relocs = NULL;
604: flaginfo.internal_relocs = NULL;
605: flaginfo.global_to_static = FALSE;
606: debug_merge_allocated = FALSE;
607:
608: coff_data (abfd)->link_info = info;
609:
610: flaginfo.strtab = _bfd_stringtab_init ();
611: if (flaginfo.strtab == NULL)
612: goto error_return;
613:
614: if (! coff_debug_merge_hash_table_init (&flaginfo.debug_merge))
615: goto error_return;
616: debug_merge_allocated = TRUE;
617:
618: /* Compute the file positions for all the sections. */
619: if (! abfd->output_has_begun)
620: {
621: if (! bfd_coff_compute_section_file_positions (abfd))
622: goto error_return;
623: }
624:
625: /* Count the line numbers and relocation entries required for the
626: output file. Set the file positions for the relocs. */
627: rel_filepos = obj_relocbase (abfd);
628: relsz = bfd_coff_relsz (abfd);
629: max_contents_size = 0;
630: max_lineno_count = 0;
631: max_reloc_count = 0;
632:
633: long_section_names = FALSE;
634: for (o = abfd->sections; o != NULL; o = o->next)
635: {
636: o->reloc_count = 0;
637: o->lineno_count = 0;
638: for (p = o->map_head.link_order; p != NULL; p = p->next)
639: {
640: if (p->type == bfd_indirect_link_order)
641: {
642: asection *sec;
643:
644: sec = p->u.indirect.section;
645:
646: /* Mark all sections which are to be included in the
647: link. This will normally be every section. We need
648: to do this so that we can identify any sections which
649: the linker has decided to not include. */
650: sec->linker_mark = TRUE;
651:
652: if (info->strip == strip_none
653: || info->strip == strip_some)
654: o->lineno_count += sec->lineno_count;
655:
1.1.1.2 christos 656: if (bfd_link_relocatable (info))
1.1 christos 657: o->reloc_count += sec->reloc_count;
658:
659: if (sec->rawsize > max_contents_size)
660: max_contents_size = sec->rawsize;
661: if (sec->size > max_contents_size)
662: max_contents_size = sec->size;
663: if (sec->lineno_count > max_lineno_count)
664: max_lineno_count = sec->lineno_count;
665: if (sec->reloc_count > max_reloc_count)
666: max_reloc_count = sec->reloc_count;
667: }
1.1.1.2 christos 668: else if (bfd_link_relocatable (info)
1.1 christos 669: && (p->type == bfd_section_reloc_link_order
670: || p->type == bfd_symbol_reloc_link_order))
671: ++o->reloc_count;
672: }
673: if (o->reloc_count == 0)
674: o->rel_filepos = 0;
675: else
676: {
677: o->flags |= SEC_RELOC;
678: o->rel_filepos = rel_filepos;
679: rel_filepos += o->reloc_count * relsz;
680: /* In PE COFF, if there are at least 0xffff relocations an
681: extra relocation will be written out to encode the count. */
682: if (obj_pe (abfd) && o->reloc_count >= 0xffff)
683: rel_filepos += relsz;
684: }
685:
686: if (bfd_coff_long_section_names (abfd)
687: && strlen (o->name) > SCNNMLEN)
688: {
689: /* This section has a long name which must go in the string
690: table. This must correspond to the code in
691: coff_write_object_contents which puts the string index
692: into the s_name field of the section header. That is why
693: we pass hash as FALSE. */
694: if (_bfd_stringtab_add (flaginfo.strtab, o->name, FALSE, FALSE)
695: == (bfd_size_type) -1)
696: goto error_return;
697: long_section_names = TRUE;
698: }
699: }
700:
701: /* If doing a relocatable link, allocate space for the pointers we
702: need to keep. */
1.1.1.2 christos 703: if (bfd_link_relocatable (info))
1.1 christos 704: {
705: unsigned int i;
706:
707: /* We use section_count + 1, rather than section_count, because
708: the target_index fields are 1 based. */
709: amt = abfd->section_count + 1;
710: amt *= sizeof (struct coff_link_section_info);
711: flaginfo.section_info = (struct coff_link_section_info *) bfd_malloc (amt);
712: if (flaginfo.section_info == NULL)
713: goto error_return;
714: for (i = 0; i <= abfd->section_count; i++)
715: {
716: flaginfo.section_info[i].relocs = NULL;
717: flaginfo.section_info[i].rel_hashes = NULL;
718: }
719: }
720:
721: /* We now know the size of the relocs, so we can determine the file
722: positions of the line numbers. */
723: line_filepos = rel_filepos;
724: linesz = bfd_coff_linesz (abfd);
725: max_output_reloc_count = 0;
726: for (o = abfd->sections; o != NULL; o = o->next)
727: {
728: if (o->lineno_count == 0)
729: o->line_filepos = 0;
730: else
731: {
732: o->line_filepos = line_filepos;
733: line_filepos += o->lineno_count * linesz;
734: }
735:
736: if (o->reloc_count != 0)
737: {
738: /* We don't know the indices of global symbols until we have
739: written out all the local symbols. For each section in
740: the output file, we keep an array of pointers to hash
741: table entries. Each entry in the array corresponds to a
742: reloc. When we find a reloc against a global symbol, we
743: set the corresponding entry in this array so that we can
744: fix up the symbol index after we have written out all the
745: local symbols.
746:
747: Because of this problem, we also keep the relocs in
748: memory until the end of the link. This wastes memory,
749: but only when doing a relocatable link, which is not the
750: common case. */
1.1.1.2 christos 751: BFD_ASSERT (bfd_link_relocatable (info));
1.1 christos 752: amt = o->reloc_count;
753: amt *= sizeof (struct internal_reloc);
754: flaginfo.section_info[o->target_index].relocs =
755: (struct internal_reloc *) bfd_malloc (amt);
756: amt = o->reloc_count;
757: amt *= sizeof (struct coff_link_hash_entry *);
758: flaginfo.section_info[o->target_index].rel_hashes =
759: (struct coff_link_hash_entry **) bfd_malloc (amt);
760: if (flaginfo.section_info[o->target_index].relocs == NULL
761: || flaginfo.section_info[o->target_index].rel_hashes == NULL)
762: goto error_return;
763:
764: if (o->reloc_count > max_output_reloc_count)
765: max_output_reloc_count = o->reloc_count;
766: }
767:
768: /* Reset the reloc and lineno counts, so that we can use them to
769: count the number of entries we have output so far. */
770: o->reloc_count = 0;
771: o->lineno_count = 0;
772: }
773:
774: obj_sym_filepos (abfd) = line_filepos;
775:
776: /* Figure out the largest number of symbols in an input BFD. Take
777: the opportunity to clear the output_has_begun fields of all the
778: input BFD's. */
779: max_sym_count = 0;
1.1.1.2 christos 780: for (sub = info->input_bfds; sub != NULL; sub = sub->link.next)
1.1 christos 781: {
782: size_t sz;
783:
784: sub->output_has_begun = FALSE;
785: sz = bfd_family_coff (sub) ? obj_raw_syment_count (sub) : 2;
786: if (sz > max_sym_count)
787: max_sym_count = sz;
788: }
789:
790: /* Allocate some buffers used while linking. */
791: amt = max_sym_count * sizeof (struct internal_syment);
792: flaginfo.internal_syms = (struct internal_syment *) bfd_malloc (amt);
793: amt = max_sym_count * sizeof (asection *);
794: flaginfo.sec_ptrs = (asection **) bfd_malloc (amt);
795: amt = max_sym_count * sizeof (long);
796: flaginfo.sym_indices = (long int *) bfd_malloc (amt);
797: flaginfo.outsyms = (bfd_byte *) bfd_malloc ((max_sym_count + 1) * symesz);
798: amt = max_lineno_count * bfd_coff_linesz (abfd);
799: flaginfo.linenos = (bfd_byte *) bfd_malloc (amt);
800: flaginfo.contents = (bfd_byte *) bfd_malloc (max_contents_size);
801: amt = max_reloc_count * relsz;
802: flaginfo.external_relocs = (bfd_byte *) bfd_malloc (amt);
1.1.1.2 christos 803: if (! bfd_link_relocatable (info))
1.1 christos 804: {
805: amt = max_reloc_count * sizeof (struct internal_reloc);
806: flaginfo.internal_relocs = (struct internal_reloc *) bfd_malloc (amt);
807: }
808: if ((flaginfo.internal_syms == NULL && max_sym_count > 0)
809: || (flaginfo.sec_ptrs == NULL && max_sym_count > 0)
810: || (flaginfo.sym_indices == NULL && max_sym_count > 0)
811: || flaginfo.outsyms == NULL
812: || (flaginfo.linenos == NULL && max_lineno_count > 0)
813: || (flaginfo.contents == NULL && max_contents_size > 0)
814: || (flaginfo.external_relocs == NULL && max_reloc_count > 0)
1.1.1.2 christos 815: || (! bfd_link_relocatable (info)
1.1 christos 816: && flaginfo.internal_relocs == NULL
817: && max_reloc_count > 0))
818: goto error_return;
819:
820: /* We now know the position of everything in the file, except that
821: we don't know the size of the symbol table and therefore we don't
822: know where the string table starts. We just build the string
823: table in memory as we go along. We process all the relocations
824: for a single input file at once. */
825: obj_raw_syment_count (abfd) = 0;
826:
827: if (coff_backend_info (abfd)->_bfd_coff_start_final_link)
828: {
829: if (! bfd_coff_start_final_link (abfd, info))
830: goto error_return;
831: }
832:
833: for (o = abfd->sections; o != NULL; o = o->next)
834: {
835: for (p = o->map_head.link_order; p != NULL; p = p->next)
836: {
837: if (p->type == bfd_indirect_link_order
838: && bfd_family_coff (p->u.indirect.section->owner))
839: {
840: sub = p->u.indirect.section->owner;
841: if (! bfd_coff_link_output_has_begun (sub, & flaginfo))
842: {
843: if (! _bfd_coff_link_input_bfd (&flaginfo, sub))
844: goto error_return;
845: sub->output_has_begun = TRUE;
846: }
847: }
848: else if (p->type == bfd_section_reloc_link_order
849: || p->type == bfd_symbol_reloc_link_order)
850: {
851: if (! _bfd_coff_reloc_link_order (abfd, &flaginfo, o, p))
852: goto error_return;
853: }
854: else
855: {
856: if (! _bfd_default_link_order (abfd, info, o, p))
857: goto error_return;
858: }
859: }
860: }
861:
862: if (flaginfo.info->strip != strip_all && flaginfo.info->discard != discard_all)
863: {
864: /* Add local symbols from foreign inputs. */
1.1.1.2 christos 865: for (sub = info->input_bfds; sub != NULL; sub = sub->link.next)
1.1 christos 866: {
867: unsigned int i;
868:
869: if (bfd_family_coff (sub) || ! bfd_get_outsymbols (sub))
870: continue;
871: for (i = 0; i < bfd_get_symcount (sub); ++i)
872: {
873: asymbol *sym = bfd_get_outsymbols (sub) [i];
874: file_ptr pos;
875: struct internal_syment isym;
1.1.1.3 ! christos 876: union internal_auxent iaux;
! 877: bfd_size_type string_size = 0, indx;
1.1 christos 878: bfd_vma written = 0;
1.1.1.3 ! christos 879: bfd_boolean rewrite = FALSE, hash;
1.1 christos 880:
881: if (! (sym->flags & BSF_LOCAL)
882: || (sym->flags & (BSF_SECTION_SYM | BSF_DEBUGGING_RELOC
883: | BSF_THREAD_LOCAL | BSF_RELC | BSF_SRELC
884: | BSF_SYNTHETIC))
885: || ((sym->flags & BSF_DEBUGGING)
886: && ! (sym->flags & BSF_FILE)))
887: continue;
888:
889: /* See if we are discarding symbols with this name. */
890: if ((flaginfo.info->strip == strip_some
891: && (bfd_hash_lookup (flaginfo.info->keep_hash,
892: bfd_asymbol_name(sym), FALSE, FALSE)
893: == NULL))
894: || (((flaginfo.info->discard == discard_sec_merge
895: && (bfd_get_section (sym)->flags & SEC_MERGE)
1.1.1.2 christos 896: && ! bfd_link_relocatable (flaginfo.info))
1.1 christos 897: || flaginfo.info->discard == discard_l)
898: && bfd_is_local_label_name (sub, bfd_asymbol_name(sym))))
899: continue;
900:
901: pos = obj_sym_filepos (abfd) + obj_raw_syment_count (abfd)
902: * symesz;
903: if (bfd_seek (abfd, pos, SEEK_SET) != 0)
904: goto error_return;
1.1.1.3 ! christos 905: if (! coff_write_alien_symbol(abfd, sym, &isym, &iaux, &written,
1.1 christos 906: &string_size, NULL, NULL))
907: goto error_return;
908:
1.1.1.3 ! christos 909: hash = !flaginfo.info->traditional_format;
! 910:
! 911: if (string_size >= 6 && isym.n_sclass == C_FILE
! 912: && ! isym._n._n_n._n_zeroes && isym.n_numaux)
1.1 christos 913: {
1.1.1.3 ! christos 914: indx = _bfd_stringtab_add (flaginfo.strtab, ".file", hash,
! 915: FALSE);
! 916: if (indx == (bfd_size_type) -1)
! 917: goto error_return;
! 918: isym._n._n_n._n_offset = STRING_SIZE_SIZE + indx;
! 919: bfd_coff_swap_sym_out (abfd, &isym, flaginfo.outsyms);
! 920: if (bfd_seek (abfd, pos, SEEK_SET) != 0
! 921: || bfd_bwrite (flaginfo.outsyms, symesz,
! 922: abfd) != symesz)
! 923: goto error_return;
! 924: string_size -= 6;
! 925: }
1.1 christos 926:
1.1.1.3 ! christos 927: if (string_size)
! 928: {
1.1 christos 929: indx = _bfd_stringtab_add (flaginfo.strtab,
930: bfd_asymbol_name (sym), hash,
931: FALSE);
932: if (indx == (bfd_size_type) -1)
933: goto error_return;
1.1.1.3 ! christos 934: if (isym.n_sclass != C_FILE)
! 935: {
! 936: isym._n._n_n._n_offset = STRING_SIZE_SIZE + indx;
! 937: bfd_coff_swap_sym_out (abfd, &isym, flaginfo.outsyms);
! 938: rewrite = TRUE;
! 939: }
! 940: else
! 941: {
! 942: BFD_ASSERT (isym.n_numaux == 1);
! 943: iaux.x_file.x_n.x_offset = STRING_SIZE_SIZE + indx;
! 944: bfd_coff_swap_aux_out (abfd, &iaux, isym.n_type, C_FILE,
! 945: 0, 1, flaginfo.outsyms + symesz);
! 946: if (bfd_seek (abfd, pos + symesz, SEEK_SET) != 0
! 947: || bfd_bwrite (flaginfo.outsyms + symesz, symesz,
! 948: abfd) != symesz)
! 949: goto error_return;
! 950: }
1.1 christos 951: }
952:
953: if (isym.n_sclass == C_FILE)
954: {
955: if (flaginfo.last_file_index != -1)
956: {
957: flaginfo.last_file.n_value = obj_raw_syment_count (abfd);
958: bfd_coff_swap_sym_out (abfd, &flaginfo.last_file,
959: flaginfo.outsyms);
960: pos = obj_sym_filepos (abfd) + flaginfo.last_file_index
961: * symesz;
962: rewrite = TRUE;
963: }
964: flaginfo.last_file_index = obj_raw_syment_count (abfd);
965: flaginfo.last_file = isym;
966: }
967:
968: if (rewrite
969: && (bfd_seek (abfd, pos, SEEK_SET) != 0
970: || bfd_bwrite (flaginfo.outsyms, symesz, abfd) != symesz))
971: goto error_return;
972:
973: obj_raw_syment_count (abfd) += written;
974: }
975: }
976: }
977:
978: if (! bfd_coff_final_link_postscript (abfd, & flaginfo))
979: goto error_return;
980:
981: /* Free up the buffers used by _bfd_coff_link_input_bfd. */
982:
983: coff_debug_merge_hash_table_free (&flaginfo.debug_merge);
984: debug_merge_allocated = FALSE;
985:
986: if (flaginfo.internal_syms != NULL)
987: {
988: free (flaginfo.internal_syms);
989: flaginfo.internal_syms = NULL;
990: }
991: if (flaginfo.sec_ptrs != NULL)
992: {
993: free (flaginfo.sec_ptrs);
994: flaginfo.sec_ptrs = NULL;
995: }
996: if (flaginfo.sym_indices != NULL)
997: {
998: free (flaginfo.sym_indices);
999: flaginfo.sym_indices = NULL;
1000: }
1001: if (flaginfo.linenos != NULL)
1002: {
1003: free (flaginfo.linenos);
1004: flaginfo.linenos = NULL;
1005: }
1006: if (flaginfo.contents != NULL)
1007: {
1008: free (flaginfo.contents);
1009: flaginfo.contents = NULL;
1010: }
1011: if (flaginfo.external_relocs != NULL)
1012: {
1013: free (flaginfo.external_relocs);
1014: flaginfo.external_relocs = NULL;
1015: }
1016: if (flaginfo.internal_relocs != NULL)
1017: {
1018: free (flaginfo.internal_relocs);
1019: flaginfo.internal_relocs = NULL;
1020: }
1021:
1022: /* The value of the last C_FILE symbol is supposed to be the symbol
1023: index of the first external symbol. Write it out again if
1024: necessary. */
1025: if (flaginfo.last_file_index != -1
1026: && (unsigned int) flaginfo.last_file.n_value != obj_raw_syment_count (abfd))
1027: {
1028: file_ptr pos;
1029:
1030: flaginfo.last_file.n_value = obj_raw_syment_count (abfd);
1031: bfd_coff_swap_sym_out (abfd, &flaginfo.last_file,
1032: flaginfo.outsyms);
1033:
1034: pos = obj_sym_filepos (abfd) + flaginfo.last_file_index * symesz;
1035: if (bfd_seek (abfd, pos, SEEK_SET) != 0
1036: || bfd_bwrite (flaginfo.outsyms, symesz, abfd) != symesz)
1037: return FALSE;
1038: }
1039:
1040: /* If doing task linking (ld --task-link) then make a pass through the
1041: global symbols, writing out any that are defined, and making them
1042: static. */
1043: if (info->task_link)
1044: {
1045: flaginfo.failed = FALSE;
1046: coff_link_hash_traverse (coff_hash_table (info),
1047: _bfd_coff_write_task_globals, &flaginfo);
1048: if (flaginfo.failed)
1049: goto error_return;
1050: }
1051:
1052: /* Write out the global symbols. */
1053: flaginfo.failed = FALSE;
1054: bfd_hash_traverse (&info->hash->table, _bfd_coff_write_global_sym, &flaginfo);
1055: if (flaginfo.failed)
1056: goto error_return;
1057:
1058: /* The outsyms buffer is used by _bfd_coff_write_global_sym. */
1059: if (flaginfo.outsyms != NULL)
1060: {
1061: free (flaginfo.outsyms);
1062: flaginfo.outsyms = NULL;
1063: }
1064:
1.1.1.2 christos 1065: if (bfd_link_relocatable (info) && max_output_reloc_count > 0)
1.1 christos 1066: {
1067: /* Now that we have written out all the global symbols, we know
1068: the symbol indices to use for relocs against them, and we can
1069: finally write out the relocs. */
1070: amt = max_output_reloc_count * relsz;
1071: external_relocs = (bfd_byte *) bfd_malloc (amt);
1072: if (external_relocs == NULL)
1073: goto error_return;
1074:
1075: for (o = abfd->sections; o != NULL; o = o->next)
1076: {
1077: struct internal_reloc *irel;
1078: struct internal_reloc *irelend;
1079: struct coff_link_hash_entry **rel_hash;
1080: bfd_byte *erel;
1081:
1082: if (o->reloc_count == 0)
1083: continue;
1084:
1085: irel = flaginfo.section_info[o->target_index].relocs;
1086: irelend = irel + o->reloc_count;
1087: rel_hash = flaginfo.section_info[o->target_index].rel_hashes;
1088: erel = external_relocs;
1089: for (; irel < irelend; irel++, rel_hash++, erel += relsz)
1090: {
1091: if (*rel_hash != NULL)
1092: {
1093: BFD_ASSERT ((*rel_hash)->indx >= 0);
1094: irel->r_symndx = (*rel_hash)->indx;
1095: }
1096: bfd_coff_swap_reloc_out (abfd, irel, erel);
1097: }
1098:
1099: if (bfd_seek (abfd, o->rel_filepos, SEEK_SET) != 0)
1100: goto error_return;
1101: if (obj_pe (abfd) && o->reloc_count >= 0xffff)
1102: {
1103: /* In PE COFF, write the count of relocs as the first
1104: reloc. The header overflow bit will be set
1105: elsewhere. */
1106: struct internal_reloc incount;
1107: bfd_byte *excount = (bfd_byte *)bfd_malloc (relsz);
1.1.1.2 christos 1108:
1.1 christos 1109: memset (&incount, 0, sizeof (incount));
1110: incount.r_vaddr = o->reloc_count + 1;
1111: bfd_coff_swap_reloc_out (abfd, &incount, excount);
1112: if (bfd_bwrite (excount, relsz, abfd) != relsz)
1113: /* We'll leak, but it's an error anyway. */
1114: goto error_return;
1115: free (excount);
1116: }
1117: if (bfd_bwrite (external_relocs,
1118: (bfd_size_type) relsz * o->reloc_count, abfd)
1119: != (bfd_size_type) relsz * o->reloc_count)
1120: goto error_return;
1121: }
1122:
1123: free (external_relocs);
1124: external_relocs = NULL;
1125: }
1126:
1127: /* Free up the section information. */
1128: if (flaginfo.section_info != NULL)
1129: {
1130: unsigned int i;
1131:
1132: for (i = 0; i < abfd->section_count; i++)
1133: {
1134: if (flaginfo.section_info[i].relocs != NULL)
1135: free (flaginfo.section_info[i].relocs);
1136: if (flaginfo.section_info[i].rel_hashes != NULL)
1137: free (flaginfo.section_info[i].rel_hashes);
1138: }
1139: free (flaginfo.section_info);
1140: flaginfo.section_info = NULL;
1141: }
1142:
1143: /* If we have optimized stabs strings, output them. */
1144: if (coff_hash_table (info)->stab_info.stabstr != NULL)
1145: {
1146: if (! _bfd_write_stab_strings (abfd, &coff_hash_table (info)->stab_info))
1147: return FALSE;
1148: }
1149:
1150: /* Write out the string table. */
1151: if (obj_raw_syment_count (abfd) != 0 || long_section_names)
1152: {
1153: file_ptr pos;
1154:
1155: pos = obj_sym_filepos (abfd) + obj_raw_syment_count (abfd) * symesz;
1156: if (bfd_seek (abfd, pos, SEEK_SET) != 0)
1157: return FALSE;
1158:
1159: #if STRING_SIZE_SIZE == 4
1160: H_PUT_32 (abfd,
1161: _bfd_stringtab_size (flaginfo.strtab) + STRING_SIZE_SIZE,
1162: strbuf);
1163: #else
1164: #error Change H_PUT_32 above
1165: #endif
1166:
1167: if (bfd_bwrite (strbuf, (bfd_size_type) STRING_SIZE_SIZE, abfd)
1168: != STRING_SIZE_SIZE)
1169: return FALSE;
1170:
1171: if (! _bfd_stringtab_emit (abfd, flaginfo.strtab))
1172: return FALSE;
1173:
1174: obj_coff_strings_written (abfd) = TRUE;
1175: }
1176:
1177: _bfd_stringtab_free (flaginfo.strtab);
1178:
1179: /* Setting bfd_get_symcount to 0 will cause write_object_contents to
1180: not try to write out the symbols. */
1181: bfd_get_symcount (abfd) = 0;
1182:
1183: return TRUE;
1184:
1185: error_return:
1186: if (debug_merge_allocated)
1187: coff_debug_merge_hash_table_free (&flaginfo.debug_merge);
1188: if (flaginfo.strtab != NULL)
1189: _bfd_stringtab_free (flaginfo.strtab);
1190: if (flaginfo.section_info != NULL)
1191: {
1192: unsigned int i;
1193:
1194: for (i = 0; i < abfd->section_count; i++)
1195: {
1196: if (flaginfo.section_info[i].relocs != NULL)
1197: free (flaginfo.section_info[i].relocs);
1198: if (flaginfo.section_info[i].rel_hashes != NULL)
1199: free (flaginfo.section_info[i].rel_hashes);
1200: }
1201: free (flaginfo.section_info);
1202: }
1203: if (flaginfo.internal_syms != NULL)
1204: free (flaginfo.internal_syms);
1205: if (flaginfo.sec_ptrs != NULL)
1206: free (flaginfo.sec_ptrs);
1207: if (flaginfo.sym_indices != NULL)
1208: free (flaginfo.sym_indices);
1209: if (flaginfo.outsyms != NULL)
1210: free (flaginfo.outsyms);
1211: if (flaginfo.linenos != NULL)
1212: free (flaginfo.linenos);
1213: if (flaginfo.contents != NULL)
1214: free (flaginfo.contents);
1215: if (flaginfo.external_relocs != NULL)
1216: free (flaginfo.external_relocs);
1217: if (flaginfo.internal_relocs != NULL)
1218: free (flaginfo.internal_relocs);
1219: if (external_relocs != NULL)
1220: free (external_relocs);
1221: return FALSE;
1222: }
1223:
1224: /* Parse out a -heap <reserved>,<commit> line. */
1225:
1226: static char *
1227: dores_com (char *ptr, bfd *output_bfd, int heap)
1228: {
1229: if (coff_data(output_bfd)->pe)
1230: {
1231: int val = strtoul (ptr, &ptr, 0);
1232:
1233: if (heap)
1234: pe_data(output_bfd)->pe_opthdr.SizeOfHeapReserve = val;
1235: else
1236: pe_data(output_bfd)->pe_opthdr.SizeOfStackReserve = val;
1237:
1238: if (ptr[0] == ',')
1239: {
1240: val = strtoul (ptr+1, &ptr, 0);
1241: if (heap)
1242: pe_data(output_bfd)->pe_opthdr.SizeOfHeapCommit = val;
1243: else
1244: pe_data(output_bfd)->pe_opthdr.SizeOfStackCommit = val;
1245: }
1246: }
1247: return ptr;
1248: }
1249:
1250: static char *
1251: get_name (char *ptr, char **dst)
1252: {
1253: while (*ptr == ' ')
1254: ptr++;
1255: *dst = ptr;
1256: while (*ptr && *ptr != ' ')
1257: ptr++;
1258: *ptr = 0;
1259: return ptr+1;
1260: }
1261:
1262: /* Process any magic embedded commands in a section called .drectve. */
1263:
1264: static int
1265: process_embedded_commands (bfd *output_bfd,
1266: struct bfd_link_info *info ATTRIBUTE_UNUSED,
1267: bfd *abfd)
1268: {
1269: asection *sec = bfd_get_section_by_name (abfd, ".drectve");
1270: char *s;
1271: char *e;
1272: bfd_byte *copy;
1273:
1274: if (!sec)
1275: return 1;
1276:
1277: if (!bfd_malloc_and_get_section (abfd, sec, ©))
1278: {
1279: if (copy != NULL)
1280: free (copy);
1281: return 0;
1282: }
1283: e = (char *) copy + sec->size;
1284:
1285: for (s = (char *) copy; s < e ; )
1286: {
1287: if (s[0] != '-')
1288: {
1289: s++;
1290: continue;
1291: }
1292: if (CONST_STRNEQ (s, "-attr"))
1293: {
1294: char *name;
1295: char *attribs;
1296: asection *asec;
1297: int loop = 1;
1298: int had_write = 0;
1299: int had_exec= 0;
1300:
1301: s += 5;
1302: s = get_name (s, &name);
1303: s = get_name (s, &attribs);
1304:
1305: while (loop)
1306: {
1307: switch (*attribs++)
1308: {
1309: case 'W':
1310: had_write = 1;
1311: break;
1312: case 'R':
1313: break;
1314: case 'S':
1315: break;
1316: case 'X':
1317: had_exec = 1;
1318: break;
1319: default:
1320: loop = 0;
1321: }
1322: }
1323: asec = bfd_get_section_by_name (abfd, name);
1324: if (asec)
1325: {
1326: if (had_exec)
1327: asec->flags |= SEC_CODE;
1328: if (!had_write)
1329: asec->flags |= SEC_READONLY;
1330: }
1331: }
1332: else if (CONST_STRNEQ (s, "-heap"))
1333: s = dores_com (s + 5, output_bfd, 1);
1334:
1335: else if (CONST_STRNEQ (s, "-stack"))
1336: s = dores_com (s + 6, output_bfd, 0);
1337:
1338: /* GNU extension for aligned commons. */
1339: else if (CONST_STRNEQ (s, "-aligncomm:"))
1340: {
1341: /* Common symbols must be aligned on reading, as it
1342: is too late to do anything here, after they have
1343: already been allocated, so just skip the directive. */
1344: s += 11;
1345: }
1346:
1347: else
1348: s++;
1349: }
1350: free (copy);
1351: return 1;
1352: }
1353:
1354: /* Place a marker against all symbols which are used by relocations.
1355: This marker can be picked up by the 'do we skip this symbol ?'
1356: loop in _bfd_coff_link_input_bfd() and used to prevent skipping
1357: that symbol. */
1358:
1359: static void
1360: mark_relocs (struct coff_final_link_info *flaginfo, bfd *input_bfd)
1361: {
1362: asection * a;
1363:
1364: if ((bfd_get_file_flags (input_bfd) & HAS_SYMS) == 0)
1365: return;
1366:
1367: for (a = input_bfd->sections; a != (asection *) NULL; a = a->next)
1368: {
1369: struct internal_reloc * internal_relocs;
1370: struct internal_reloc * irel;
1371: struct internal_reloc * irelend;
1372:
1.1.1.2 christos 1373: if ((a->flags & SEC_RELOC) == 0 || a->reloc_count < 1
1374: || a->linker_mark == 0)
1.1 christos 1375: continue;
1376: /* Don't mark relocs in excluded sections. */
1377: if (a->output_section == bfd_abs_section_ptr)
1378: continue;
1379:
1380: /* Read in the relocs. */
1381: internal_relocs = _bfd_coff_read_internal_relocs
1382: (input_bfd, a, FALSE,
1383: flaginfo->external_relocs,
1.1.1.2 christos 1384: bfd_link_relocatable (flaginfo->info),
1385: (bfd_link_relocatable (flaginfo->info)
1.1 christos 1386: ? (flaginfo->section_info[ a->output_section->target_index ].relocs + a->output_section->reloc_count)
1387: : flaginfo->internal_relocs)
1388: );
1389:
1390: if (internal_relocs == NULL)
1391: continue;
1392:
1393: irel = internal_relocs;
1394: irelend = irel + a->reloc_count;
1395:
1396: /* Place a mark in the sym_indices array (whose entries have
1397: been initialised to 0) for all of the symbols that are used
1398: in the relocation table. This will then be picked up in the
1399: skip/don't-skip pass. */
1400: for (; irel < irelend; irel++)
1401: flaginfo->sym_indices[ irel->r_symndx ] = -1;
1402: }
1403: }
1404:
1405: /* Link an input file into the linker output file. This function
1406: handles all the sections and relocations of the input file at once. */
1407:
1408: bfd_boolean
1409: _bfd_coff_link_input_bfd (struct coff_final_link_info *flaginfo, bfd *input_bfd)
1410: {
1411: unsigned int n_tmask = coff_data (input_bfd)->local_n_tmask;
1412: unsigned int n_btshft = coff_data (input_bfd)->local_n_btshft;
1413: bfd_boolean (*adjust_symndx)
1414: (bfd *, struct bfd_link_info *, bfd *, asection *,
1415: struct internal_reloc *, bfd_boolean *);
1416: bfd *output_bfd;
1417: const char *strings;
1418: bfd_size_type syment_base;
1419: bfd_boolean copy, hash;
1420: bfd_size_type isymesz;
1421: bfd_size_type osymesz;
1422: bfd_size_type linesz;
1423: bfd_byte *esym;
1424: bfd_byte *esym_end;
1425: struct internal_syment *isymp;
1426: asection **secpp;
1427: long *indexp;
1428: unsigned long output_index;
1429: bfd_byte *outsym;
1430: struct coff_link_hash_entry **sym_hash;
1431: asection *o;
1432:
1433: /* Move all the symbols to the output file. */
1434:
1435: output_bfd = flaginfo->output_bfd;
1436: strings = NULL;
1437: syment_base = obj_raw_syment_count (output_bfd);
1438: isymesz = bfd_coff_symesz (input_bfd);
1439: osymesz = bfd_coff_symesz (output_bfd);
1440: linesz = bfd_coff_linesz (input_bfd);
1441: BFD_ASSERT (linesz == bfd_coff_linesz (output_bfd));
1442:
1443: copy = FALSE;
1444: if (! flaginfo->info->keep_memory)
1445: copy = TRUE;
1446: hash = TRUE;
1.1.1.3 ! christos 1447: if (flaginfo->info->traditional_format)
1.1 christos 1448: hash = FALSE;
1449:
1450: if (! _bfd_coff_get_external_symbols (input_bfd))
1451: return FALSE;
1452:
1453: esym = (bfd_byte *) obj_coff_external_syms (input_bfd);
1454: esym_end = esym + obj_raw_syment_count (input_bfd) * isymesz;
1455: isymp = flaginfo->internal_syms;
1456: secpp = flaginfo->sec_ptrs;
1457: indexp = flaginfo->sym_indices;
1458: output_index = syment_base;
1459: outsym = flaginfo->outsyms;
1460:
1461: if (coff_data (output_bfd)->pe
1462: && ! process_embedded_commands (output_bfd, flaginfo->info, input_bfd))
1463: return FALSE;
1464:
1465: /* If we are going to perform relocations and also strip/discard some
1466: symbols then we must make sure that we do not strip/discard those
1467: symbols that are going to be involved in the relocations. */
1468: if (( flaginfo->info->strip != strip_none
1469: || flaginfo->info->discard != discard_none)
1.1.1.2 christos 1470: && bfd_link_relocatable (flaginfo->info))
1.1 christos 1471: {
1472: /* Mark the symbol array as 'not-used'. */
1473: memset (indexp, 0, obj_raw_syment_count (input_bfd) * sizeof * indexp);
1474:
1475: mark_relocs (flaginfo, input_bfd);
1476: }
1477:
1478: while (esym < esym_end)
1479: {
1480: struct internal_syment isym;
1481: enum coff_symbol_classification classification;
1482: bfd_boolean skip;
1483: bfd_boolean global;
1484: bfd_boolean dont_skip_symbol;
1485: int add;
1486:
1487: bfd_coff_swap_sym_in (input_bfd, esym, isymp);
1488:
1489: /* Make a copy of *isymp so that the relocate_section function
1490: always sees the original values. This is more reliable than
1491: always recomputing the symbol value even if we are stripping
1492: the symbol. */
1493: isym = *isymp;
1494:
1495: classification = bfd_coff_classify_symbol (input_bfd, &isym);
1496: switch (classification)
1497: {
1498: default:
1499: abort ();
1500: case COFF_SYMBOL_GLOBAL:
1501: case COFF_SYMBOL_PE_SECTION:
1502: case COFF_SYMBOL_LOCAL:
1503: *secpp = coff_section_from_bfd_index (input_bfd, isym.n_scnum);
1504: break;
1505: case COFF_SYMBOL_COMMON:
1506: *secpp = bfd_com_section_ptr;
1507: break;
1508: case COFF_SYMBOL_UNDEFINED:
1509: *secpp = bfd_und_section_ptr;
1510: break;
1511: }
1512:
1513: /* Extract the flag indicating if this symbol is used by a
1514: relocation. */
1515: if ((flaginfo->info->strip != strip_none
1516: || flaginfo->info->discard != discard_none)
1.1.1.2 christos 1517: && bfd_link_relocatable (flaginfo->info))
1.1 christos 1518: dont_skip_symbol = *indexp;
1519: else
1520: dont_skip_symbol = FALSE;
1521:
1522: *indexp = -1;
1523:
1524: skip = FALSE;
1525: global = FALSE;
1526: add = 1 + isym.n_numaux;
1527:
1528: /* If we are stripping all symbols, we want to skip this one. */
1529: if (flaginfo->info->strip == strip_all && ! dont_skip_symbol)
1530: skip = TRUE;
1531:
1532: if (! skip)
1533: {
1534: switch (classification)
1535: {
1536: default:
1537: abort ();
1538: case COFF_SYMBOL_GLOBAL:
1539: case COFF_SYMBOL_COMMON:
1540: case COFF_SYMBOL_PE_SECTION:
1541: /* This is a global symbol. Global symbols come at the
1542: end of the symbol table, so skip them for now.
1543: Locally defined function symbols, however, are an
1544: exception, and are not moved to the end. */
1545: global = TRUE;
1546: if (! ISFCN (isym.n_type))
1547: skip = TRUE;
1548: break;
1549:
1550: case COFF_SYMBOL_UNDEFINED:
1551: /* Undefined symbols are left for the end. */
1552: global = TRUE;
1553: skip = TRUE;
1554: break;
1555:
1556: case COFF_SYMBOL_LOCAL:
1557: /* This is a local symbol. Skip it if we are discarding
1558: local symbols. */
1559: if (flaginfo->info->discard == discard_all && ! dont_skip_symbol)
1560: skip = TRUE;
1561: break;
1562: }
1563: }
1564:
1565: #ifndef COFF_WITH_PE
1566: /* Skip section symbols for sections which are not going to be
1567: emitted. */
1568: if (!skip
1569: && !dont_skip_symbol
1570: && isym.n_sclass == C_STAT
1571: && isym.n_type == T_NULL
1572: && isym.n_numaux > 0
1573: && ((*secpp)->output_section == bfd_abs_section_ptr
1574: || bfd_section_removed_from_list (output_bfd,
1575: (*secpp)->output_section)))
1576: skip = TRUE;
1577: #endif
1578:
1579: /* If we stripping debugging symbols, and this is a debugging
1580: symbol, then skip it. FIXME: gas sets the section to N_ABS
1581: for some types of debugging symbols; I don't know if this is
1582: a bug or not. In any case, we handle it here. */
1583: if (! skip
1584: && flaginfo->info->strip == strip_debugger
1585: && ! dont_skip_symbol
1586: && (isym.n_scnum == N_DEBUG
1587: || (isym.n_scnum == N_ABS
1588: && (isym.n_sclass == C_AUTO
1589: || isym.n_sclass == C_REG
1590: || isym.n_sclass == C_MOS
1591: || isym.n_sclass == C_MOE
1592: || isym.n_sclass == C_MOU
1593: || isym.n_sclass == C_ARG
1594: || isym.n_sclass == C_REGPARM
1595: || isym.n_sclass == C_FIELD
1596: || isym.n_sclass == C_EOS))))
1597: skip = TRUE;
1598:
1599: /* If some symbols are stripped based on the name, work out the
1600: name and decide whether to skip this symbol. */
1601: if (! skip
1602: && (flaginfo->info->strip == strip_some
1603: || flaginfo->info->discard == discard_l))
1604: {
1605: const char *name;
1606: char buf[SYMNMLEN + 1];
1607:
1608: name = _bfd_coff_internal_syment_name (input_bfd, &isym, buf);
1609: if (name == NULL)
1610: return FALSE;
1611:
1612: if (! dont_skip_symbol
1613: && ((flaginfo->info->strip == strip_some
1614: && (bfd_hash_lookup (flaginfo->info->keep_hash, name, FALSE,
1615: FALSE) == NULL))
1616: || (! global
1617: && flaginfo->info->discard == discard_l
1618: && bfd_is_local_label_name (input_bfd, name))))
1619: skip = TRUE;
1620: }
1621:
1622: /* If this is an enum, struct, or union tag, see if we have
1623: already output an identical type. */
1624: if (! skip
1.1.1.3 ! christos 1625: && !flaginfo->info->traditional_format
1.1 christos 1626: && (isym.n_sclass == C_ENTAG
1627: || isym.n_sclass == C_STRTAG
1628: || isym.n_sclass == C_UNTAG)
1629: && isym.n_numaux == 1)
1630: {
1631: const char *name;
1632: char buf[SYMNMLEN + 1];
1633: struct coff_debug_merge_hash_entry *mh;
1634: struct coff_debug_merge_type *mt;
1635: union internal_auxent aux;
1636: struct coff_debug_merge_element **epp;
1637: bfd_byte *esl, *eslend;
1638: struct internal_syment *islp;
1639: bfd_size_type amt;
1640:
1641: name = _bfd_coff_internal_syment_name (input_bfd, &isym, buf);
1642: if (name == NULL)
1643: return FALSE;
1644:
1645: /* Ignore fake names invented by compiler; treat them all as
1646: the same name. */
1647: if (*name == '~' || *name == '.' || *name == '$'
1648: || (*name == bfd_get_symbol_leading_char (input_bfd)
1649: && (name[1] == '~' || name[1] == '.' || name[1] == '$')))
1650: name = "";
1651:
1652: mh = coff_debug_merge_hash_lookup (&flaginfo->debug_merge, name,
1653: TRUE, TRUE);
1654: if (mh == NULL)
1655: return FALSE;
1656:
1657: /* Allocate memory to hold type information. If this turns
1658: out to be a duplicate, we pass this address to
1659: bfd_release. */
1660: amt = sizeof (struct coff_debug_merge_type);
1661: mt = (struct coff_debug_merge_type *) bfd_alloc (input_bfd, amt);
1662: if (mt == NULL)
1663: return FALSE;
1664: mt->type_class = isym.n_sclass;
1665:
1666: /* Pick up the aux entry, which points to the end of the tag
1667: entries. */
1668: bfd_coff_swap_aux_in (input_bfd, (esym + isymesz),
1669: isym.n_type, isym.n_sclass, 0, isym.n_numaux,
1670: &aux);
1671:
1672: /* Gather the elements. */
1673: epp = &mt->elements;
1674: mt->elements = NULL;
1675: islp = isymp + 2;
1676: esl = esym + 2 * isymesz;
1677: eslend = ((bfd_byte *) obj_coff_external_syms (input_bfd)
1678: + aux.x_sym.x_fcnary.x_fcn.x_endndx.l * isymesz);
1679: while (esl < eslend)
1680: {
1681: const char *elename;
1682: char elebuf[SYMNMLEN + 1];
1683: char *name_copy;
1684:
1685: bfd_coff_swap_sym_in (input_bfd, esl, islp);
1686:
1687: amt = sizeof (struct coff_debug_merge_element);
1688: *epp = (struct coff_debug_merge_element *)
1689: bfd_alloc (input_bfd, amt);
1690: if (*epp == NULL)
1691: return FALSE;
1692:
1693: elename = _bfd_coff_internal_syment_name (input_bfd, islp,
1694: elebuf);
1695: if (elename == NULL)
1696: return FALSE;
1697:
1698: amt = strlen (elename) + 1;
1699: name_copy = (char *) bfd_alloc (input_bfd, amt);
1700: if (name_copy == NULL)
1701: return FALSE;
1702: strcpy (name_copy, elename);
1703:
1704: (*epp)->name = name_copy;
1705: (*epp)->type = islp->n_type;
1706: (*epp)->tagndx = 0;
1707: if (islp->n_numaux >= 1
1708: && islp->n_type != T_NULL
1709: && islp->n_sclass != C_EOS)
1710: {
1711: union internal_auxent eleaux;
1712: long indx;
1713:
1714: bfd_coff_swap_aux_in (input_bfd, (esl + isymesz),
1715: islp->n_type, islp->n_sclass, 0,
1716: islp->n_numaux, &eleaux);
1717: indx = eleaux.x_sym.x_tagndx.l;
1718:
1719: /* FIXME: If this tagndx entry refers to a symbol
1720: defined later in this file, we just ignore it.
1721: Handling this correctly would be tedious, and may
1722: not be required. */
1723: if (indx > 0
1724: && (indx
1725: < ((esym -
1726: (bfd_byte *) obj_coff_external_syms (input_bfd))
1727: / (long) isymesz)))
1728: {
1729: (*epp)->tagndx = flaginfo->sym_indices[indx];
1730: if ((*epp)->tagndx < 0)
1731: (*epp)->tagndx = 0;
1732: }
1733: }
1734: epp = &(*epp)->next;
1735: *epp = NULL;
1736:
1737: esl += (islp->n_numaux + 1) * isymesz;
1738: islp += islp->n_numaux + 1;
1739: }
1740:
1741: /* See if we already have a definition which matches this
1742: type. We always output the type if it has no elements,
1743: for simplicity. */
1744: if (mt->elements == NULL)
1745: bfd_release (input_bfd, mt);
1746: else
1747: {
1748: struct coff_debug_merge_type *mtl;
1749:
1750: for (mtl = mh->types; mtl != NULL; mtl = mtl->next)
1751: {
1752: struct coff_debug_merge_element *me, *mel;
1753:
1754: if (mtl->type_class != mt->type_class)
1755: continue;
1756:
1757: for (me = mt->elements, mel = mtl->elements;
1758: me != NULL && mel != NULL;
1759: me = me->next, mel = mel->next)
1760: {
1761: if (strcmp (me->name, mel->name) != 0
1762: || me->type != mel->type
1763: || me->tagndx != mel->tagndx)
1764: break;
1765: }
1766:
1767: if (me == NULL && mel == NULL)
1768: break;
1769: }
1770:
1771: if (mtl == NULL || (bfd_size_type) mtl->indx >= syment_base)
1772: {
1773: /* This is the first definition of this type. */
1774: mt->indx = output_index;
1775: mt->next = mh->types;
1776: mh->types = mt;
1777: }
1778: else
1779: {
1780: /* This is a redefinition which can be merged. */
1781: bfd_release (input_bfd, mt);
1782: *indexp = mtl->indx;
1783: add = (eslend - esym) / isymesz;
1784: skip = TRUE;
1785: }
1786: }
1787: }
1788:
1789: /* We now know whether we are to skip this symbol or not. */
1790: if (! skip)
1791: {
1792: /* Adjust the symbol in order to output it. */
1793:
1794: if (isym._n._n_n._n_zeroes == 0
1795: && isym._n._n_n._n_offset != 0)
1796: {
1797: const char *name;
1798: bfd_size_type indx;
1799:
1800: /* This symbol has a long name. Enter it in the string
1801: table we are building. Note that we do not check
1802: bfd_coff_symname_in_debug. That is only true for
1803: XCOFF, and XCOFF requires different linking code
1804: anyhow. */
1805: name = _bfd_coff_internal_syment_name (input_bfd, &isym, NULL);
1806: if (name == NULL)
1807: return FALSE;
1808: indx = _bfd_stringtab_add (flaginfo->strtab, name, hash, copy);
1809: if (indx == (bfd_size_type) -1)
1810: return FALSE;
1811: isym._n._n_n._n_offset = STRING_SIZE_SIZE + indx;
1812: }
1813:
1814: switch (isym.n_sclass)
1815: {
1816: case C_AUTO:
1817: case C_MOS:
1818: case C_EOS:
1819: case C_MOE:
1820: case C_MOU:
1821: case C_UNTAG:
1822: case C_STRTAG:
1823: case C_ENTAG:
1824: case C_TPDEF:
1825: case C_ARG:
1826: case C_USTATIC:
1827: case C_REG:
1828: case C_REGPARM:
1829: case C_FIELD:
1830: /* The symbol value should not be modified. */
1831: break;
1832:
1833: case C_FCN:
1834: if (obj_pe (input_bfd)
1835: && strcmp (isym.n_name, ".bf") != 0
1836: && isym.n_scnum > 0)
1837: {
1838: /* For PE, .lf and .ef get their value left alone,
1839: while .bf gets relocated. However, they all have
1840: "real" section numbers, and need to be moved into
1841: the new section. */
1842: isym.n_scnum = (*secpp)->output_section->target_index;
1843: break;
1844: }
1845: /* Fall through. */
1846: default:
1847: case C_LABEL: /* Not completely sure about these 2 */
1848: case C_EXTDEF:
1849: case C_BLOCK:
1850: case C_EFCN:
1851: case C_NULL:
1852: case C_EXT:
1853: case C_STAT:
1854: case C_SECTION:
1855: case C_NT_WEAK:
1856: /* Compute new symbol location. */
1857: if (isym.n_scnum > 0)
1858: {
1859: isym.n_scnum = (*secpp)->output_section->target_index;
1860: isym.n_value += (*secpp)->output_offset;
1861: if (! obj_pe (input_bfd))
1862: isym.n_value -= (*secpp)->vma;
1863: if (! obj_pe (flaginfo->output_bfd))
1864: isym.n_value += (*secpp)->output_section->vma;
1865: }
1866: break;
1867:
1868: case C_FILE:
1869: /* The value of a C_FILE symbol is the symbol index of
1870: the next C_FILE symbol. The value of the last C_FILE
1871: symbol is the symbol index to the first external
1872: symbol (actually, coff_renumber_symbols does not get
1873: this right--it just sets the value of the last C_FILE
1874: symbol to zero--and nobody has ever complained about
1875: it). We try to get this right, below, just before we
1876: write the symbols out, but in the general case we may
1877: have to write the symbol out twice. */
1878: if (flaginfo->last_file_index != -1
1879: && flaginfo->last_file.n_value != (bfd_vma) output_index)
1880: {
1881: /* We must correct the value of the last C_FILE
1882: entry. */
1883: flaginfo->last_file.n_value = output_index;
1884: if ((bfd_size_type) flaginfo->last_file_index >= syment_base)
1885: {
1886: /* The last C_FILE symbol is in this input file. */
1887: bfd_coff_swap_sym_out (output_bfd,
1888: &flaginfo->last_file,
1889: (flaginfo->outsyms
1890: + ((flaginfo->last_file_index
1891: - syment_base)
1892: * osymesz)));
1893: }
1894: else
1895: {
1896: file_ptr pos;
1897:
1898: /* We have already written out the last C_FILE
1899: symbol. We need to write it out again. We
1900: borrow *outsym temporarily. */
1901: bfd_coff_swap_sym_out (output_bfd,
1902: &flaginfo->last_file, outsym);
1903: pos = obj_sym_filepos (output_bfd);
1904: pos += flaginfo->last_file_index * osymesz;
1905: if (bfd_seek (output_bfd, pos, SEEK_SET) != 0
1906: || bfd_bwrite (outsym, osymesz, output_bfd) != osymesz)
1907: return FALSE;
1908: }
1909: }
1910:
1911: flaginfo->last_file_index = output_index;
1912: flaginfo->last_file = isym;
1913: break;
1914: }
1915:
1916: /* If doing task linking, convert normal global function symbols to
1917: static functions. */
1918: if (flaginfo->info->task_link && IS_EXTERNAL (input_bfd, isym))
1919: isym.n_sclass = C_STAT;
1920:
1921: /* Output the symbol. */
1922: bfd_coff_swap_sym_out (output_bfd, &isym, outsym);
1923:
1924: *indexp = output_index;
1925:
1926: if (global)
1927: {
1928: long indx;
1929: struct coff_link_hash_entry *h;
1930:
1931: indx = ((esym - (bfd_byte *) obj_coff_external_syms (input_bfd))
1932: / isymesz);
1933: h = obj_coff_sym_hashes (input_bfd)[indx];
1934: if (h == NULL)
1935: {
1936: /* This can happen if there were errors earlier in
1937: the link. */
1938: bfd_set_error (bfd_error_bad_value);
1939: return FALSE;
1940: }
1941: h->indx = output_index;
1942: }
1943:
1944: output_index += add;
1945: outsym += add * osymesz;
1946: }
1947:
1948: esym += add * isymesz;
1949: isymp += add;
1950: ++secpp;
1951: ++indexp;
1952: for (--add; add > 0; --add)
1953: {
1954: *secpp++ = NULL;
1955: *indexp++ = -1;
1956: }
1957: }
1958:
1959: /* Fix up the aux entries. This must be done in a separate pass,
1960: because we don't know the correct symbol indices until we have
1961: already decided which symbols we are going to keep. */
1962: esym = (bfd_byte *) obj_coff_external_syms (input_bfd);
1963: esym_end = esym + obj_raw_syment_count (input_bfd) * isymesz;
1964: isymp = flaginfo->internal_syms;
1965: indexp = flaginfo->sym_indices;
1966: sym_hash = obj_coff_sym_hashes (input_bfd);
1967: outsym = flaginfo->outsyms;
1968:
1969: while (esym < esym_end)
1970: {
1971: int add;
1972:
1973: add = 1 + isymp->n_numaux;
1974:
1975: if ((*indexp < 0
1976: || (bfd_size_type) *indexp < syment_base)
1977: && (*sym_hash == NULL
1978: || (*sym_hash)->auxbfd != input_bfd))
1979: esym += add * isymesz;
1980: else
1981: {
1982: struct coff_link_hash_entry *h;
1983: int i;
1984:
1985: h = NULL;
1986: if (*indexp < 0)
1987: {
1988: h = *sym_hash;
1989:
1990: /* The m68k-motorola-sysv assembler will sometimes
1991: generate two symbols with the same name, but only one
1992: will have aux entries. */
1993: BFD_ASSERT (isymp->n_numaux == 0
1994: || h->numaux == 0
1995: || h->numaux == isymp->n_numaux);
1996: }
1997:
1998: esym += isymesz;
1999:
2000: if (h == NULL)
2001: outsym += osymesz;
2002:
2003: /* Handle the aux entries. This handling is based on
2004: coff_pointerize_aux. I don't know if it always correct. */
2005: for (i = 0; i < isymp->n_numaux && esym < esym_end; i++)
2006: {
2007: union internal_auxent aux;
2008: union internal_auxent *auxp;
2009:
2010: if (h != NULL && h->aux != NULL && (h->numaux > i))
2011: auxp = h->aux + i;
2012: else
2013: {
2014: bfd_coff_swap_aux_in (input_bfd, esym, isymp->n_type,
2015: isymp->n_sclass, i, isymp->n_numaux, &aux);
2016: auxp = &aux;
2017: }
2018:
2019: if (isymp->n_sclass == C_FILE)
2020: {
2021: /* If this is a long filename, we must put it in the
2022: string table. */
2023: if (auxp->x_file.x_n.x_zeroes == 0
2024: && auxp->x_file.x_n.x_offset != 0)
2025: {
2026: const char *filename;
2027: bfd_size_type indx;
2028:
2029: BFD_ASSERT (auxp->x_file.x_n.x_offset
2030: >= STRING_SIZE_SIZE);
2031: if (strings == NULL)
2032: {
2033: strings = _bfd_coff_read_string_table (input_bfd);
2034: if (strings == NULL)
2035: return FALSE;
2036: }
1.1.1.2 christos 2037: if ((bfd_size_type) auxp->x_file.x_n.x_offset >= obj_coff_strings_len (input_bfd))
2038: filename = _("<corrupt>");
2039: else
2040: filename = strings + auxp->x_file.x_n.x_offset;
1.1 christos 2041: indx = _bfd_stringtab_add (flaginfo->strtab, filename,
2042: hash, copy);
2043: if (indx == (bfd_size_type) -1)
2044: return FALSE;
2045: auxp->x_file.x_n.x_offset = STRING_SIZE_SIZE + indx;
2046: }
2047: }
2048: else if ((isymp->n_sclass != C_STAT || isymp->n_type != T_NULL)
2049: && isymp->n_sclass != C_NT_WEAK)
2050: {
2051: unsigned long indx;
2052:
2053: if (ISFCN (isymp->n_type)
2054: || ISTAG (isymp->n_sclass)
2055: || isymp->n_sclass == C_BLOCK
2056: || isymp->n_sclass == C_FCN)
2057: {
2058: indx = auxp->x_sym.x_fcnary.x_fcn.x_endndx.l;
2059: if (indx > 0
2060: && indx < obj_raw_syment_count (input_bfd))
2061: {
2062: /* We look forward through the symbol for
2063: the index of the next symbol we are going
2064: to include. I don't know if this is
2065: entirely right. */
2066: while ((flaginfo->sym_indices[indx] < 0
2067: || ((bfd_size_type) flaginfo->sym_indices[indx]
2068: < syment_base))
2069: && indx < obj_raw_syment_count (input_bfd))
2070: ++indx;
2071: if (indx >= obj_raw_syment_count (input_bfd))
2072: indx = output_index;
2073: else
2074: indx = flaginfo->sym_indices[indx];
2075: auxp->x_sym.x_fcnary.x_fcn.x_endndx.l = indx;
2076: }
2077: }
2078:
2079: indx = auxp->x_sym.x_tagndx.l;
2080: if (indx > 0 && indx < obj_raw_syment_count (input_bfd))
2081: {
2082: long symindx;
2083:
2084: symindx = flaginfo->sym_indices[indx];
2085: if (symindx < 0)
2086: auxp->x_sym.x_tagndx.l = 0;
2087: else
2088: auxp->x_sym.x_tagndx.l = symindx;
2089: }
2090:
2091: /* The .bf symbols are supposed to be linked through
2092: the endndx field. We need to carry this list
2093: across object files. */
2094: if (i == 0
2095: && h == NULL
2096: && isymp->n_sclass == C_FCN
2097: && (isymp->_n._n_n._n_zeroes != 0
2098: || isymp->_n._n_n._n_offset == 0)
2099: && isymp->_n._n_name[0] == '.'
2100: && isymp->_n._n_name[1] == 'b'
2101: && isymp->_n._n_name[2] == 'f'
2102: && isymp->_n._n_name[3] == '\0')
2103: {
2104: if (flaginfo->last_bf_index != -1)
2105: {
2106: flaginfo->last_bf.x_sym.x_fcnary.x_fcn.x_endndx.l =
2107: *indexp;
2108:
2109: if ((bfd_size_type) flaginfo->last_bf_index
2110: >= syment_base)
2111: {
2112: void *auxout;
2113:
2114: /* The last .bf symbol is in this input
2115: file. This will only happen if the
2116: assembler did not set up the .bf
2117: endndx symbols correctly. */
2118: auxout = (flaginfo->outsyms
2119: + ((flaginfo->last_bf_index
2120: - syment_base)
2121: * osymesz));
2122:
2123: bfd_coff_swap_aux_out (output_bfd,
2124: &flaginfo->last_bf,
2125: isymp->n_type,
2126: isymp->n_sclass,
2127: 0, isymp->n_numaux,
2128: auxout);
2129: }
2130: else
2131: {
2132: file_ptr pos;
2133:
2134: /* We have already written out the last
2135: .bf aux entry. We need to write it
2136: out again. We borrow *outsym
2137: temporarily. FIXME: This case should
2138: be made faster. */
2139: bfd_coff_swap_aux_out (output_bfd,
2140: &flaginfo->last_bf,
2141: isymp->n_type,
2142: isymp->n_sclass,
2143: 0, isymp->n_numaux,
2144: outsym);
2145: pos = obj_sym_filepos (output_bfd);
2146: pos += flaginfo->last_bf_index * osymesz;
2147: if (bfd_seek (output_bfd, pos, SEEK_SET) != 0
2148: || (bfd_bwrite (outsym, osymesz, output_bfd)
2149: != osymesz))
2150: return FALSE;
2151: }
2152: }
2153:
2154: if (auxp->x_sym.x_fcnary.x_fcn.x_endndx.l != 0)
2155: flaginfo->last_bf_index = -1;
2156: else
2157: {
2158: /* The endndx field of this aux entry must
2159: be updated with the symbol number of the
2160: next .bf symbol. */
2161: flaginfo->last_bf = *auxp;
2162: flaginfo->last_bf_index = (((outsym - flaginfo->outsyms)
2163: / osymesz)
2164: + syment_base);
2165: }
2166: }
2167: }
2168:
2169: if (h == NULL)
2170: {
2171: bfd_coff_swap_aux_out (output_bfd, auxp, isymp->n_type,
2172: isymp->n_sclass, i, isymp->n_numaux,
2173: outsym);
2174: outsym += osymesz;
2175: }
2176:
2177: esym += isymesz;
2178: }
2179: }
2180:
2181: indexp += add;
2182: isymp += add;
2183: sym_hash += add;
2184: }
2185:
2186: /* Relocate the line numbers, unless we are stripping them. */
2187: if (flaginfo->info->strip == strip_none
2188: || flaginfo->info->strip == strip_some)
2189: {
2190: for (o = input_bfd->sections; o != NULL; o = o->next)
2191: {
2192: bfd_vma offset;
2193: bfd_byte *eline;
2194: bfd_byte *elineend;
2195: bfd_byte *oeline;
2196: bfd_boolean skipping;
2197: file_ptr pos;
2198: bfd_size_type amt;
2199:
2200: /* FIXME: If SEC_HAS_CONTENTS is not for the section, then
2201: build_link_order in ldwrite.c will not have created a
2202: link order, which means that we will not have seen this
2203: input section in _bfd_coff_final_link, which means that
2204: we will not have allocated space for the line numbers of
2205: this section. I don't think line numbers can be
2206: meaningful for a section which does not have
2207: SEC_HAS_CONTENTS set, but, if they do, this must be
2208: changed. */
2209: if (o->lineno_count == 0
2210: || (o->output_section->flags & SEC_HAS_CONTENTS) == 0)
2211: continue;
2212:
2213: if (bfd_seek (input_bfd, o->line_filepos, SEEK_SET) != 0
2214: || bfd_bread (flaginfo->linenos, linesz * o->lineno_count,
2215: input_bfd) != linesz * o->lineno_count)
2216: return FALSE;
2217:
2218: offset = o->output_section->vma + o->output_offset - o->vma;
2219: eline = flaginfo->linenos;
2220: oeline = flaginfo->linenos;
2221: elineend = eline + linesz * o->lineno_count;
2222: skipping = FALSE;
2223: for (; eline < elineend; eline += linesz)
2224: {
2225: struct internal_lineno iline;
2226:
2227: bfd_coff_swap_lineno_in (input_bfd, eline, &iline);
2228:
2229: if (iline.l_lnno != 0)
2230: iline.l_addr.l_paddr += offset;
2231: else if (iline.l_addr.l_symndx >= 0
2232: && ((unsigned long) iline.l_addr.l_symndx
2233: < obj_raw_syment_count (input_bfd)))
2234: {
2235: long indx;
2236:
2237: indx = flaginfo->sym_indices[iline.l_addr.l_symndx];
2238:
2239: if (indx < 0)
2240: {
2241: /* These line numbers are attached to a symbol
2242: which we are stripping. We must discard the
2243: line numbers because reading them back with
2244: no associated symbol (or associating them all
2245: with symbol #0) will fail. We can't regain
2246: the space in the output file, but at least
2247: they're dense. */
2248: skipping = TRUE;
2249: }
2250: else
2251: {
2252: struct internal_syment is;
2253: union internal_auxent ia;
2254:
2255: /* Fix up the lnnoptr field in the aux entry of
2256: the symbol. It turns out that we can't do
2257: this when we modify the symbol aux entries,
2258: because gas sometimes screws up the lnnoptr
2259: field and makes it an offset from the start
2260: of the line numbers rather than an absolute
2261: file index. */
2262: bfd_coff_swap_sym_in (output_bfd,
2263: (flaginfo->outsyms
2264: + ((indx - syment_base)
2265: * osymesz)), &is);
2266: if ((ISFCN (is.n_type)
2267: || is.n_sclass == C_BLOCK)
2268: && is.n_numaux >= 1)
2269: {
2270: void *auxptr;
2271:
2272: auxptr = (flaginfo->outsyms
2273: + ((indx - syment_base + 1)
2274: * osymesz));
2275: bfd_coff_swap_aux_in (output_bfd, auxptr,
2276: is.n_type, is.n_sclass,
2277: 0, is.n_numaux, &ia);
2278: ia.x_sym.x_fcnary.x_fcn.x_lnnoptr =
2279: (o->output_section->line_filepos
2280: + o->output_section->lineno_count * linesz
2281: + eline - flaginfo->linenos);
2282: bfd_coff_swap_aux_out (output_bfd, &ia,
2283: is.n_type, is.n_sclass, 0,
2284: is.n_numaux, auxptr);
2285: }
2286:
2287: skipping = FALSE;
2288: }
2289:
2290: iline.l_addr.l_symndx = indx;
2291: }
2292:
2293: if (!skipping)
2294: {
2295: bfd_coff_swap_lineno_out (output_bfd, &iline, oeline);
2296: oeline += linesz;
2297: }
2298: }
2299:
2300: pos = o->output_section->line_filepos;
2301: pos += o->output_section->lineno_count * linesz;
2302: amt = oeline - flaginfo->linenos;
2303: if (bfd_seek (output_bfd, pos, SEEK_SET) != 0
2304: || bfd_bwrite (flaginfo->linenos, amt, output_bfd) != amt)
2305: return FALSE;
2306:
2307: o->output_section->lineno_count += amt / linesz;
2308: }
2309: }
2310:
2311: /* If we swapped out a C_FILE symbol, guess that the next C_FILE
2312: symbol will be the first symbol in the next input file. In the
2313: normal case, this will save us from writing out the C_FILE symbol
2314: again. */
2315: if (flaginfo->last_file_index != -1
2316: && (bfd_size_type) flaginfo->last_file_index >= syment_base)
2317: {
2318: flaginfo->last_file.n_value = output_index;
2319: bfd_coff_swap_sym_out (output_bfd, &flaginfo->last_file,
2320: (flaginfo->outsyms
2321: + ((flaginfo->last_file_index - syment_base)
2322: * osymesz)));
2323: }
2324:
2325: /* Write the modified symbols to the output file. */
2326: if (outsym > flaginfo->outsyms)
2327: {
2328: file_ptr pos;
2329: bfd_size_type amt;
2330:
2331: pos = obj_sym_filepos (output_bfd) + syment_base * osymesz;
2332: amt = outsym - flaginfo->outsyms;
2333: if (bfd_seek (output_bfd, pos, SEEK_SET) != 0
2334: || bfd_bwrite (flaginfo->outsyms, amt, output_bfd) != amt)
2335: return FALSE;
2336:
2337: BFD_ASSERT ((obj_raw_syment_count (output_bfd)
2338: + (outsym - flaginfo->outsyms) / osymesz)
2339: == output_index);
2340:
2341: obj_raw_syment_count (output_bfd) = output_index;
2342: }
2343:
2344: /* Relocate the contents of each section. */
2345: adjust_symndx = coff_backend_info (input_bfd)->_bfd_coff_adjust_symndx;
2346: for (o = input_bfd->sections; o != NULL; o = o->next)
2347: {
2348: bfd_byte *contents;
2349: struct coff_section_tdata *secdata;
2350:
2351: if (! o->linker_mark)
2352: /* This section was omitted from the link. */
2353: continue;
2354:
2355: if ((o->flags & SEC_LINKER_CREATED) != 0)
2356: continue;
2357:
2358: if ((o->flags & SEC_HAS_CONTENTS) == 0
2359: || (o->size == 0 && (o->flags & SEC_RELOC) == 0))
2360: {
2361: if ((o->flags & SEC_RELOC) != 0
2362: && o->reloc_count != 0)
2363: {
2364: (*_bfd_error_handler)
2365: (_("%B: relocs in section `%A', but it has no contents"),
2366: input_bfd, o);
2367: bfd_set_error (bfd_error_no_contents);
2368: return FALSE;
2369: }
2370:
2371: continue;
2372: }
2373:
2374: secdata = coff_section_data (input_bfd, o);
2375: if (secdata != NULL && secdata->contents != NULL)
2376: contents = secdata->contents;
2377: else
2378: {
2379: contents = flaginfo->contents;
1.1.1.2 christos 2380: if (! bfd_get_full_section_contents (input_bfd, o, &contents))
2381: return FALSE;
1.1 christos 2382: }
2383:
2384: if ((o->flags & SEC_RELOC) != 0)
2385: {
2386: int target_index;
2387: struct internal_reloc *internal_relocs;
2388: struct internal_reloc *irel;
2389:
2390: /* Read in the relocs. */
2391: target_index = o->output_section->target_index;
2392: internal_relocs = (_bfd_coff_read_internal_relocs
2393: (input_bfd, o, FALSE, flaginfo->external_relocs,
1.1.1.2 christos 2394: bfd_link_relocatable (flaginfo->info),
2395: (bfd_link_relocatable (flaginfo->info)
1.1 christos 2396: ? (flaginfo->section_info[target_index].relocs
2397: + o->output_section->reloc_count)
2398: : flaginfo->internal_relocs)));
1.1.1.2 christos 2399: if (internal_relocs == NULL
2400: && o->reloc_count > 0)
1.1 christos 2401: return FALSE;
2402:
2403: /* Run through the relocs looking for relocs against symbols
2404: coming from discarded sections and complain about them. */
2405: irel = internal_relocs;
2406: for (; irel < &internal_relocs[o->reloc_count]; irel++)
2407: {
2408: struct coff_link_hash_entry *h;
2409: asection *ps = NULL;
2410: long symndx = irel->r_symndx;
2411: if (symndx < 0)
2412: continue;
2413: h = obj_coff_sym_hashes (input_bfd)[symndx];
2414: if (h == NULL)
2415: continue;
2416: while (h->root.type == bfd_link_hash_indirect
2417: || h->root.type == bfd_link_hash_warning)
2418: h = (struct coff_link_hash_entry *) h->root.u.i.link;
2419: if (h->root.type == bfd_link_hash_defined
2420: || h->root.type == bfd_link_hash_defweak)
2421: ps = h->root.u.def.section;
2422: if (ps == NULL)
2423: continue;
2424: /* Complain if definition comes from an excluded section. */
2425: if (ps->flags & SEC_EXCLUDE)
2426: (*flaginfo->info->callbacks->einfo)
2427: (_("%X`%s' referenced in section `%A' of %B: "
2428: "defined in discarded section `%A' of %B\n"),
2429: h->root.root.string, o, input_bfd, ps, ps->owner);
2430: }
2431:
2432: /* Call processor specific code to relocate the section
2433: contents. */
2434: if (! bfd_coff_relocate_section (output_bfd, flaginfo->info,
2435: input_bfd, o,
2436: contents,
2437: internal_relocs,
2438: flaginfo->internal_syms,
2439: flaginfo->sec_ptrs))
2440: return FALSE;
2441:
1.1.1.2 christos 2442: if (bfd_link_relocatable (flaginfo->info))
1.1 christos 2443: {
2444: bfd_vma offset;
2445: struct internal_reloc *irelend;
2446: struct coff_link_hash_entry **rel_hash;
2447:
2448: offset = o->output_section->vma + o->output_offset - o->vma;
2449: irel = internal_relocs;
2450: irelend = irel + o->reloc_count;
2451: rel_hash = (flaginfo->section_info[target_index].rel_hashes
2452: + o->output_section->reloc_count);
2453: for (; irel < irelend; irel++, rel_hash++)
2454: {
2455: struct coff_link_hash_entry *h;
2456: bfd_boolean adjusted;
2457:
2458: *rel_hash = NULL;
2459:
2460: /* Adjust the reloc address and symbol index. */
2461: irel->r_vaddr += offset;
2462:
2463: if (irel->r_symndx == -1)
2464: continue;
2465:
2466: if (adjust_symndx)
2467: {
2468: if (! (*adjust_symndx) (output_bfd, flaginfo->info,
2469: input_bfd, o, irel,
2470: &adjusted))
2471: return FALSE;
2472: if (adjusted)
2473: continue;
2474: }
2475:
2476: h = obj_coff_sym_hashes (input_bfd)[irel->r_symndx];
2477: if (h != NULL)
2478: {
2479: /* This is a global symbol. */
2480: if (h->indx >= 0)
2481: irel->r_symndx = h->indx;
2482: else
2483: {
2484: /* This symbol is being written at the end
2485: of the file, and we do not yet know the
2486: symbol index. We save the pointer to the
2487: hash table entry in the rel_hash list.
2488: We set the indx field to -2 to indicate
2489: that this symbol must not be stripped. */
2490: *rel_hash = h;
2491: h->indx = -2;
2492: }
2493: }
2494: else
2495: {
2496: long indx;
2497:
2498: indx = flaginfo->sym_indices[irel->r_symndx];
2499: if (indx != -1)
2500: irel->r_symndx = indx;
2501: else
2502: {
2503: struct internal_syment *is;
2504: const char *name;
2505: char buf[SYMNMLEN + 1];
2506:
2507: /* This reloc is against a symbol we are
2508: stripping. This should have been handled
2509: by the 'dont_skip_symbol' code in the while
2510: loop at the top of this function. */
2511: is = flaginfo->internal_syms + irel->r_symndx;
2512:
2513: name = (_bfd_coff_internal_syment_name
2514: (input_bfd, is, buf));
2515: if (name == NULL)
2516: return FALSE;
2517:
1.1.1.3 ! christos 2518: (*flaginfo->info->callbacks->unattached_reloc)
! 2519: (flaginfo->info, name, input_bfd, o, irel->r_vaddr);
1.1 christos 2520: }
2521: }
2522: }
2523:
2524: o->output_section->reloc_count += o->reloc_count;
2525: }
2526: }
2527:
2528: /* Write out the modified section contents. */
2529: if (secdata == NULL || secdata->stab_info == NULL)
2530: {
2531: file_ptr loc = o->output_offset * bfd_octets_per_byte (output_bfd);
2532: if (! bfd_set_section_contents (output_bfd, o->output_section,
2533: contents, loc, o->size))
2534: return FALSE;
2535: }
2536: else
2537: {
2538: if (! (_bfd_write_section_stabs
2539: (output_bfd, &coff_hash_table (flaginfo->info)->stab_info,
2540: o, &secdata->stab_info, contents)))
2541: return FALSE;
2542: }
2543: }
2544:
2545: if (! flaginfo->info->keep_memory
2546: && ! _bfd_coff_free_symbols (input_bfd))
2547: return FALSE;
2548:
2549: return TRUE;
2550: }
2551:
2552: /* Write out a global symbol. Called via bfd_hash_traverse. */
2553:
2554: bfd_boolean
2555: _bfd_coff_write_global_sym (struct bfd_hash_entry *bh, void *data)
2556: {
2557: struct coff_link_hash_entry *h = (struct coff_link_hash_entry *) bh;
2558: struct coff_final_link_info *flaginfo = (struct coff_final_link_info *) data;
2559: bfd *output_bfd;
2560: struct internal_syment isym;
2561: bfd_size_type symesz;
2562: unsigned int i;
2563: file_ptr pos;
2564:
2565: output_bfd = flaginfo->output_bfd;
2566:
2567: if (h->root.type == bfd_link_hash_warning)
2568: {
2569: h = (struct coff_link_hash_entry *) h->root.u.i.link;
2570: if (h->root.type == bfd_link_hash_new)
2571: return TRUE;
2572: }
2573:
2574: if (h->indx >= 0)
2575: return TRUE;
2576:
2577: if (h->indx != -2
2578: && (flaginfo->info->strip == strip_all
2579: || (flaginfo->info->strip == strip_some
2580: && (bfd_hash_lookup (flaginfo->info->keep_hash,
2581: h->root.root.string, FALSE, FALSE)
2582: == NULL))))
2583: return TRUE;
2584:
2585: switch (h->root.type)
2586: {
2587: default:
2588: case bfd_link_hash_new:
2589: case bfd_link_hash_warning:
2590: abort ();
2591: return FALSE;
2592:
2593: case bfd_link_hash_undefined:
2594: case bfd_link_hash_undefweak:
2595: isym.n_scnum = N_UNDEF;
2596: isym.n_value = 0;
2597: break;
2598:
2599: case bfd_link_hash_defined:
2600: case bfd_link_hash_defweak:
2601: {
2602: asection *sec;
2603:
2604: sec = h->root.u.def.section->output_section;
2605: if (bfd_is_abs_section (sec))
2606: isym.n_scnum = N_ABS;
2607: else
2608: isym.n_scnum = sec->target_index;
2609: isym.n_value = (h->root.u.def.value
2610: + h->root.u.def.section->output_offset);
2611: if (! obj_pe (flaginfo->output_bfd))
2612: isym.n_value += sec->vma;
2613: }
2614: break;
2615:
2616: case bfd_link_hash_common:
2617: isym.n_scnum = N_UNDEF;
2618: isym.n_value = h->root.u.c.size;
2619: break;
2620:
2621: case bfd_link_hash_indirect:
2622: /* Just ignore these. They can't be handled anyhow. */
2623: return TRUE;
2624: }
2625:
2626: if (strlen (h->root.root.string) <= SYMNMLEN)
2627: strncpy (isym._n._n_name, h->root.root.string, SYMNMLEN);
2628: else
2629: {
2630: bfd_boolean hash;
2631: bfd_size_type indx;
2632:
2633: hash = TRUE;
1.1.1.3 ! christos 2634: if (flaginfo->info->traditional_format)
1.1 christos 2635: hash = FALSE;
2636: indx = _bfd_stringtab_add (flaginfo->strtab, h->root.root.string, hash,
2637: FALSE);
2638: if (indx == (bfd_size_type) -1)
2639: {
2640: flaginfo->failed = TRUE;
2641: return FALSE;
2642: }
2643: isym._n._n_n._n_zeroes = 0;
2644: isym._n._n_n._n_offset = STRING_SIZE_SIZE + indx;
2645: }
2646:
2647: isym.n_sclass = h->symbol_class;
2648: isym.n_type = h->type;
2649:
2650: if (isym.n_sclass == C_NULL)
2651: isym.n_sclass = C_EXT;
2652:
2653: /* If doing task linking and this is the pass where we convert
2654: defined globals to statics, then do that conversion now. If the
2655: symbol is not being converted, just ignore it and it will be
2656: output during a later pass. */
2657: if (flaginfo->global_to_static)
2658: {
2659: if (! IS_EXTERNAL (output_bfd, isym))
2660: return TRUE;
2661:
2662: isym.n_sclass = C_STAT;
2663: }
2664:
2665: /* When a weak symbol is not overridden by a strong one,
2666: turn it into an external symbol when not building a
2667: shared or relocatable object. */
1.1.1.2 christos 2668: if (! bfd_link_pic (flaginfo->info)
2669: && ! bfd_link_relocatable (flaginfo->info)
1.1 christos 2670: && IS_WEAK_EXTERNAL (flaginfo->output_bfd, isym))
2671: isym.n_sclass = C_EXT;
2672:
2673: isym.n_numaux = h->numaux;
2674:
2675: bfd_coff_swap_sym_out (output_bfd, &isym, flaginfo->outsyms);
2676:
2677: symesz = bfd_coff_symesz (output_bfd);
2678:
2679: pos = obj_sym_filepos (output_bfd);
2680: pos += obj_raw_syment_count (output_bfd) * symesz;
2681: if (bfd_seek (output_bfd, pos, SEEK_SET) != 0
2682: || bfd_bwrite (flaginfo->outsyms, symesz, output_bfd) != symesz)
2683: {
2684: flaginfo->failed = TRUE;
2685: return FALSE;
2686: }
2687:
2688: h->indx = obj_raw_syment_count (output_bfd);
2689:
2690: ++obj_raw_syment_count (output_bfd);
2691:
2692: /* Write out any associated aux entries. Most of the aux entries
2693: will have been modified in _bfd_coff_link_input_bfd. We have to
2694: handle section aux entries here, now that we have the final
2695: relocation and line number counts. */
2696: for (i = 0; i < isym.n_numaux; i++)
2697: {
2698: union internal_auxent *auxp;
2699:
2700: auxp = h->aux + i;
2701:
2702: /* Look for a section aux entry here using the same tests that
2703: coff_swap_aux_out uses. */
2704: if (i == 0
2705: && (isym.n_sclass == C_STAT
2706: || isym.n_sclass == C_HIDDEN)
2707: && isym.n_type == T_NULL
2708: && (h->root.type == bfd_link_hash_defined
2709: || h->root.type == bfd_link_hash_defweak))
2710: {
2711: asection *sec;
2712:
2713: sec = h->root.u.def.section->output_section;
2714: if (sec != NULL)
2715: {
2716: auxp->x_scn.x_scnlen = sec->size;
2717:
2718: /* For PE, an overflow on the final link reportedly does
2719: not matter. FIXME: Why not? */
2720: if (sec->reloc_count > 0xffff
2721: && (! obj_pe (output_bfd)
1.1.1.2 christos 2722: || bfd_link_relocatable (flaginfo->info)))
1.1 christos 2723: (*_bfd_error_handler)
2724: (_("%s: %s: reloc overflow: 0x%lx > 0xffff"),
2725: bfd_get_filename (output_bfd),
2726: bfd_get_section_name (output_bfd, sec),
2727: sec->reloc_count);
2728:
2729: if (sec->lineno_count > 0xffff
2730: && (! obj_pe (output_bfd)
1.1.1.2 christos 2731: || bfd_link_relocatable (flaginfo->info)))
1.1 christos 2732: (*_bfd_error_handler)
2733: (_("%s: warning: %s: line number overflow: 0x%lx > 0xffff"),
2734: bfd_get_filename (output_bfd),
2735: bfd_get_section_name (output_bfd, sec),
2736: sec->lineno_count);
2737:
2738: auxp->x_scn.x_nreloc = sec->reloc_count;
2739: auxp->x_scn.x_nlinno = sec->lineno_count;
2740: auxp->x_scn.x_checksum = 0;
2741: auxp->x_scn.x_associated = 0;
2742: auxp->x_scn.x_comdat = 0;
2743: }
2744: }
2745:
2746: bfd_coff_swap_aux_out (output_bfd, auxp, isym.n_type,
2747: isym.n_sclass, (int) i, isym.n_numaux,
2748: flaginfo->outsyms);
2749: if (bfd_bwrite (flaginfo->outsyms, symesz, output_bfd) != symesz)
2750: {
2751: flaginfo->failed = TRUE;
2752: return FALSE;
2753: }
2754: ++obj_raw_syment_count (output_bfd);
2755: }
2756:
2757: return TRUE;
2758: }
2759:
2760: /* Write out task global symbols, converting them to statics. Called
2761: via coff_link_hash_traverse. Calls bfd_coff_write_global_sym to do
2762: the dirty work, if the symbol we are processing needs conversion. */
2763:
2764: bfd_boolean
2765: _bfd_coff_write_task_globals (struct coff_link_hash_entry *h, void *data)
2766: {
2767: struct coff_final_link_info *flaginfo = (struct coff_final_link_info *) data;
2768: bfd_boolean rtnval = TRUE;
2769: bfd_boolean save_global_to_static;
2770:
2771: if (h->root.type == bfd_link_hash_warning)
2772: h = (struct coff_link_hash_entry *) h->root.u.i.link;
2773:
2774: if (h->indx < 0)
2775: {
2776: switch (h->root.type)
2777: {
2778: case bfd_link_hash_defined:
2779: case bfd_link_hash_defweak:
2780: save_global_to_static = flaginfo->global_to_static;
2781: flaginfo->global_to_static = TRUE;
2782: rtnval = _bfd_coff_write_global_sym (&h->root.root, data);
2783: flaginfo->global_to_static = save_global_to_static;
2784: break;
2785: default:
2786: break;
2787: }
2788: }
2789: return (rtnval);
2790: }
2791:
2792: /* Handle a link order which is supposed to generate a reloc. */
2793:
2794: bfd_boolean
2795: _bfd_coff_reloc_link_order (bfd *output_bfd,
2796: struct coff_final_link_info *flaginfo,
2797: asection *output_section,
2798: struct bfd_link_order *link_order)
2799: {
2800: reloc_howto_type *howto;
2801: struct internal_reloc *irel;
2802: struct coff_link_hash_entry **rel_hash_ptr;
2803:
2804: howto = bfd_reloc_type_lookup (output_bfd, link_order->u.reloc.p->reloc);
2805: if (howto == NULL)
2806: {
2807: bfd_set_error (bfd_error_bad_value);
2808: return FALSE;
2809: }
2810:
2811: if (link_order->u.reloc.p->addend != 0)
2812: {
2813: bfd_size_type size;
2814: bfd_byte *buf;
2815: bfd_reloc_status_type rstat;
2816: bfd_boolean ok;
2817: file_ptr loc;
2818:
2819: size = bfd_get_reloc_size (howto);
2820: buf = (bfd_byte *) bfd_zmalloc (size);
1.1.1.2 christos 2821: if (buf == NULL && size != 0)
1.1 christos 2822: return FALSE;
2823:
2824: rstat = _bfd_relocate_contents (howto, output_bfd,
2825: (bfd_vma) link_order->u.reloc.p->addend,\
2826: buf);
2827: switch (rstat)
2828: {
2829: case bfd_reloc_ok:
2830: break;
2831: default:
2832: case bfd_reloc_outofrange:
2833: abort ();
2834: case bfd_reloc_overflow:
1.1.1.3 ! christos 2835: (*flaginfo->info->callbacks->reloc_overflow)
! 2836: (flaginfo->info, NULL,
! 2837: (link_order->type == bfd_section_reloc_link_order
! 2838: ? bfd_section_name (output_bfd,
! 2839: link_order->u.reloc.p->u.section)
! 2840: : link_order->u.reloc.p->u.name),
! 2841: howto->name, link_order->u.reloc.p->addend,
! 2842: (bfd *) NULL, (asection *) NULL, (bfd_vma) 0);
1.1 christos 2843: break;
2844: }
2845: loc = link_order->offset * bfd_octets_per_byte (output_bfd);
2846: ok = bfd_set_section_contents (output_bfd, output_section, buf,
2847: loc, size);
2848: free (buf);
2849: if (! ok)
2850: return FALSE;
2851: }
2852:
2853: /* Store the reloc information in the right place. It will get
2854: swapped and written out at the end of the final_link routine. */
2855: irel = (flaginfo->section_info[output_section->target_index].relocs
2856: + output_section->reloc_count);
2857: rel_hash_ptr = (flaginfo->section_info[output_section->target_index].rel_hashes
2858: + output_section->reloc_count);
2859:
2860: memset (irel, 0, sizeof (struct internal_reloc));
2861: *rel_hash_ptr = NULL;
2862:
2863: irel->r_vaddr = output_section->vma + link_order->offset;
2864:
2865: if (link_order->type == bfd_section_reloc_link_order)
2866: {
2867: /* We need to somehow locate a symbol in the right section. The
2868: symbol must either have a value of zero, or we must adjust
2869: the addend by the value of the symbol. FIXME: Write this
2870: when we need it. The old linker couldn't handle this anyhow. */
2871: abort ();
2872: *rel_hash_ptr = NULL;
2873: irel->r_symndx = 0;
2874: }
2875: else
2876: {
2877: struct coff_link_hash_entry *h;
2878:
2879: h = ((struct coff_link_hash_entry *)
2880: bfd_wrapped_link_hash_lookup (output_bfd, flaginfo->info,
2881: link_order->u.reloc.p->u.name,
2882: FALSE, FALSE, TRUE));
2883: if (h != NULL)
2884: {
2885: if (h->indx >= 0)
2886: irel->r_symndx = h->indx;
2887: else
2888: {
2889: /* Set the index to -2 to force this symbol to get
2890: written out. */
2891: h->indx = -2;
2892: *rel_hash_ptr = h;
2893: irel->r_symndx = 0;
2894: }
2895: }
2896: else
2897: {
1.1.1.3 ! christos 2898: (*flaginfo->info->callbacks->unattached_reloc)
! 2899: (flaginfo->info, link_order->u.reloc.p->u.name,
! 2900: (bfd *) NULL, (asection *) NULL, (bfd_vma) 0);
1.1 christos 2901: irel->r_symndx = 0;
2902: }
2903: }
2904:
2905: /* FIXME: Is this always right? */
2906: irel->r_type = howto->type;
2907:
2908: /* r_size is only used on the RS/6000, which needs its own linker
2909: routines anyhow. r_extern is only used for ECOFF. */
2910:
2911: /* FIXME: What is the right value for r_offset? Is zero OK? */
2912: ++output_section->reloc_count;
2913:
2914: return TRUE;
2915: }
2916:
2917: /* A basic reloc handling routine which may be used by processors with
2918: simple relocs. */
2919:
2920: bfd_boolean
2921: _bfd_coff_generic_relocate_section (bfd *output_bfd,
2922: struct bfd_link_info *info,
2923: bfd *input_bfd,
2924: asection *input_section,
2925: bfd_byte *contents,
2926: struct internal_reloc *relocs,
2927: struct internal_syment *syms,
2928: asection **sections)
2929: {
2930: struct internal_reloc *rel;
2931: struct internal_reloc *relend;
2932:
2933: rel = relocs;
2934: relend = rel + input_section->reloc_count;
2935: for (; rel < relend; rel++)
2936: {
2937: long symndx;
2938: struct coff_link_hash_entry *h;
2939: struct internal_syment *sym;
2940: bfd_vma addend;
2941: bfd_vma val;
1.1.1.2 christos 2942: asection *sec;
1.1 christos 2943: reloc_howto_type *howto;
2944: bfd_reloc_status_type rstat;
2945:
2946: symndx = rel->r_symndx;
2947:
2948: if (symndx == -1)
2949: {
2950: h = NULL;
2951: sym = NULL;
2952: }
2953: else if (symndx < 0
2954: || (unsigned long) symndx >= obj_raw_syment_count (input_bfd))
2955: {
2956: (*_bfd_error_handler)
2957: ("%B: illegal symbol index %ld in relocs", input_bfd, symndx);
2958: return FALSE;
2959: }
2960: else
2961: {
2962: h = obj_coff_sym_hashes (input_bfd)[symndx];
2963: sym = syms + symndx;
2964: }
2965:
2966: /* COFF treats common symbols in one of two ways. Either the
2967: size of the symbol is included in the section contents, or it
2968: is not. We assume that the size is not included, and force
2969: the rtype_to_howto function to adjust the addend as needed. */
2970: if (sym != NULL && sym->n_scnum != 0)
2971: addend = - sym->n_value;
2972: else
2973: addend = 0;
2974:
2975: howto = bfd_coff_rtype_to_howto (input_bfd, input_section, rel, h,
2976: sym, &addend);
2977: if (howto == NULL)
2978: return FALSE;
2979:
2980: /* If we are doing a relocatable link, then we can just ignore
2981: a PC relative reloc that is pcrel_offset. It will already
2982: have the correct value. If this is not a relocatable link,
2983: then we should ignore the symbol value. */
2984: if (howto->pc_relative && howto->pcrel_offset)
2985: {
1.1.1.2 christos 2986: if (bfd_link_relocatable (info))
1.1 christos 2987: continue;
2988: if (sym != NULL && sym->n_scnum != 0)
2989: addend += sym->n_value;
2990: }
2991:
2992: val = 0;
1.1.1.2 christos 2993: sec = NULL;
1.1 christos 2994: if (h == NULL)
2995: {
2996: if (symndx == -1)
2997: {
2998: sec = bfd_abs_section_ptr;
2999: val = 0;
3000: }
3001: else
3002: {
3003: sec = sections[symndx];
1.1.1.2 christos 3004:
3005: /* PR 19623: Relocations against symbols in
3006: the absolute sections should ignored. */
3007: if (bfd_is_abs_section (sec))
3008: continue;
3009:
1.1 christos 3010: val = (sec->output_section->vma
3011: + sec->output_offset
3012: + sym->n_value);
3013: if (! obj_pe (input_bfd))
3014: val -= sec->vma;
3015: }
3016: }
3017: else
3018: {
3019: if (h->root.type == bfd_link_hash_defined
3020: || h->root.type == bfd_link_hash_defweak)
3021: {
3022: /* Defined weak symbols are a GNU extension. */
3023: sec = h->root.u.def.section;
3024: val = (h->root.u.def.value
3025: + sec->output_section->vma
3026: + sec->output_offset);
3027: }
3028:
3029: else if (h->root.type == bfd_link_hash_undefweak)
3030: {
3031: if (h->symbol_class == C_NT_WEAK && h->numaux == 1)
3032: {
3033: /* See _Microsoft Portable Executable and Common Object
3034: File Format Specification_, section 5.5.3.
3035: Note that weak symbols without aux records are a GNU
3036: extension.
3037: FIXME: All weak externals are treated as having
3038: characteristic IMAGE_WEAK_EXTERN_SEARCH_NOLIBRARY (1).
3039: These behave as per SVR4 ABI: A library member
3040: will resolve a weak external only if a normal
3041: external causes the library member to be linked.
3042: See also linker.c: generic_link_check_archive_element. */
3043: struct coff_link_hash_entry *h2 =
3044: h->auxbfd->tdata.coff_obj_data->sym_hashes[
3045: h->aux->x_sym.x_tagndx.l];
3046:
3047: if (!h2 || h2->root.type == bfd_link_hash_undefined)
3048: {
3049: sec = bfd_abs_section_ptr;
3050: val = 0;
3051: }
3052: else
3053: {
3054: sec = h2->root.u.def.section;
3055: val = h2->root.u.def.value
3056: + sec->output_section->vma + sec->output_offset;
3057: }
3058: }
3059: else
3060: /* This is a GNU extension. */
3061: val = 0;
3062: }
3063:
1.1.1.2 christos 3064: else if (! bfd_link_relocatable (info))
1.1.1.3 ! christos 3065: (*info->callbacks->undefined_symbol)
! 3066: (info, h->root.root.string, input_bfd, input_section,
! 3067: rel->r_vaddr - input_section->vma, TRUE);
1.1 christos 3068: }
3069:
1.1.1.2 christos 3070: /* If the input section defining the symbol has been discarded
3071: then zero this reloc field. */
3072: if (sec != NULL && discarded_section (sec))
3073: {
3074: _bfd_clear_contents (howto, input_bfd, input_section,
3075: contents + (rel->r_vaddr - input_section->vma));
3076: continue;
3077: }
3078:
1.1 christos 3079: if (info->base_file)
3080: {
3081: /* Emit a reloc if the backend thinks it needs it. */
3082: if (sym && pe_data (output_bfd)->in_reloc_p (output_bfd, howto))
3083: {
3084: /* Relocation to a symbol in a section which isn't
3085: absolute. We output the address here to a file.
3086: This file is then read by dlltool when generating the
3087: reloc section. Note that the base file is not
3088: portable between systems. We write out a bfd_vma here,
3089: and dlltool reads in a bfd_vma. */
3090: bfd_vma addr = (rel->r_vaddr
3091: - input_section->vma
3092: + input_section->output_offset
3093: + input_section->output_section->vma);
3094: if (coff_data (output_bfd)->pe)
3095: addr -= pe_data(output_bfd)->pe_opthdr.ImageBase;
3096: if (fwrite (&addr, 1, sizeof (bfd_vma), (FILE *) info->base_file)
3097: != sizeof (bfd_vma))
3098: {
3099: bfd_set_error (bfd_error_system_call);
3100: return FALSE;
3101: }
3102: }
3103: }
3104:
3105: rstat = _bfd_final_link_relocate (howto, input_bfd, input_section,
3106: contents,
3107: rel->r_vaddr - input_section->vma,
3108: val, addend);
3109:
3110: switch (rstat)
3111: {
3112: default:
3113: abort ();
3114: case bfd_reloc_ok:
3115: break;
3116: case bfd_reloc_outofrange:
3117: (*_bfd_error_handler)
3118: (_("%B: bad reloc address 0x%lx in section `%A'"),
3119: input_bfd, input_section, (unsigned long) rel->r_vaddr);
3120: return FALSE;
3121: case bfd_reloc_overflow:
3122: {
3123: const char *name;
3124: char buf[SYMNMLEN + 1];
3125:
3126: if (symndx == -1)
3127: name = "*ABS*";
3128: else if (h != NULL)
3129: name = NULL;
3130: else
3131: {
3132: name = _bfd_coff_internal_syment_name (input_bfd, sym, buf);
3133: if (name == NULL)
3134: return FALSE;
3135: }
3136:
1.1.1.3 ! christos 3137: (*info->callbacks->reloc_overflow)
! 3138: (info, (h ? &h->root : NULL), name, howto->name,
! 3139: (bfd_vma) 0, input_bfd, input_section,
! 3140: rel->r_vaddr - input_section->vma);
1.1 christos 3141: }
3142: }
3143: }
3144: return TRUE;
3145: }
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