1 /* POWER/PowerPC XCOFF linker support.
2 Copyright 1995, 1996 Free Software Foundation, Inc.
3 Written by Ian Lance Taylor <ian@cygnus.com>, Cygnus Support.
5 This file is part of BFD, the Binary File Descriptor library.
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 2 of the License, or
10 (at your option) any later version.
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.
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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
25 #include "coff/internal.h"
28 /* This file holds the XCOFF linker code. */
30 #define STRING_SIZE_SIZE (4)
32 /* In order to support linking different object file formats into an
33 XCOFF format, we need to be able to determine whether a particular
34 bfd_target is an XCOFF vector. FIXME: We need to rethink this
36 #define XCOFF_XVECP(xv) \
37 (strcmp ((xv)->name, "aixcoff-rs6000") == 0 \
38 || strcmp ((xv)->name, "xcoff-powermac") == 0)
40 /* Get the XCOFF hash table entries for a BFD. */
41 #define obj_xcoff_sym_hashes(bfd) \
42 ((struct xcoff_link_hash_entry **) obj_coff_sym_hashes (bfd))
44 /* XCOFF relocation types. These probably belong in a header file
45 somewhere. The relocations are described in the function
46 _bfd_ppc_xcoff_relocate_section in this file. */
62 #define R_RRTBI (0x14)
63 #define R_RRTBA (0x15)
71 /* The first word of global linkage code. This must be modified by
72 filling in the correct TOC offset. */
74 #define XCOFF_GLINK_FIRST (0x81820000) /* lwz r12,0(r2) */
76 /* The remaining words of global linkage code. */
78 static unsigned long xcoff_glink_code[] =
80 0x90410014, /* stw r2,20(r1) */
81 0x800c0000, /* lwz r0,0(r12) */
82 0x804c0004, /* lwz r2,4(r12) */
83 0x7c0903a6, /* mtctr r0 */
84 0x4e800420, /* bctr */
85 0x0, /* start of traceback table */
86 0x000c8000, /* traceback table */
87 0x0 /* traceback table */
90 #define XCOFF_GLINK_SIZE \
91 (((sizeof xcoff_glink_code / sizeof xcoff_glink_code[0]) * 4) + 4)
93 /* We reuse the SEC_ROM flag as a mark flag for garbage collection.
94 This flag will only be used on input sections. */
96 #define SEC_MARK (SEC_ROM)
98 /* The ldhdr structure. This appears at the start of the .loader
101 struct internal_ldhdr
103 /* The version number: currently always 1. */
104 unsigned long l_version;
105 /* The number of symbol table entries. */
106 bfd_size_type l_nsyms;
107 /* The number of relocation table entries. */
108 bfd_size_type l_nreloc;
109 /* The length of the import file string table. */
110 bfd_size_type l_istlen;
111 /* The number of import files. */
112 bfd_size_type l_nimpid;
113 /* The offset from the start of the .loader section to the first
114 entry in the import file table. */
115 bfd_size_type l_impoff;
116 /* The length of the string table. */
117 bfd_size_type l_stlen;
118 /* The offset from the start of the .loader section to the first
119 entry in the string table. */
120 bfd_size_type l_stoff;
123 struct external_ldhdr
125 bfd_byte l_version[4];
127 bfd_byte l_nreloc[4];
128 bfd_byte l_istlen[4];
129 bfd_byte l_nimpid[4];
130 bfd_byte l_impoff[4];
135 #define LDHDRSZ (8 * 4)
137 /* The ldsym structure. This is used to represent a symbol in the
140 struct internal_ldsym
144 /* The symbol name if <= SYMNMLEN characters. */
145 char _l_name[SYMNMLEN];
148 /* Zero if the symbol name is more than SYMNMLEN characters. */
150 /* The offset in the string table if the symbol name is more
151 than SYMNMLEN characters. */
155 /* The symbol value. */
157 /* The symbol section number. */
159 /* The symbol type and flags. */
161 /* The symbol storage class. */
163 /* The import file ID. */
164 bfd_size_type l_ifile;
165 /* Offset to the parameter type check string. */
166 bfd_size_type l_parm;
169 struct external_ldsym
173 bfd_byte _l_name[SYMNMLEN];
176 bfd_byte _l_zeroes[4];
177 bfd_byte _l_offset[4];
182 bfd_byte l_smtype[1];
183 bfd_byte l_smclas[1];
188 #define LDSYMSZ (8 + 3 * 4 + 2 + 2)
190 /* These flags are for the l_smtype field (the lower three bits are an
193 /* Imported symbol. */
194 #define L_IMPORT (0x40)
196 #define L_ENTRY (0x20)
197 /* Exported symbol. */
198 #define L_EXPORT (0x10)
200 /* The ldrel structure. This is used to represent a reloc in the
203 struct internal_ldrel
205 /* The reloc address. */
207 /* The symbol table index in the .loader section symbol table. */
208 bfd_size_type l_symndx;
209 /* The relocation type and size. */
211 /* The section number this relocation applies to. */
215 struct external_ldrel
218 bfd_byte l_symndx[4];
220 bfd_byte l_rsecnm[2];
223 #define LDRELSZ (2 * 4 + 2 * 2)
225 /* The list of import files. */
227 struct xcoff_import_file
229 /* The next entry in the list. */
230 struct xcoff_import_file *next;
235 /* The member name. */
239 /* An entry in the XCOFF linker hash table. */
241 struct xcoff_link_hash_entry
243 struct bfd_link_hash_entry root;
245 /* Symbol index in output file. Set to -1 initially. Set to -2 if
246 there is a reloc against this symbol. */
249 /* If we have created a TOC entry for this symbol, this is the .tc
250 section which holds it. */
251 asection *toc_section;
255 /* If we have created a TOC entry (the XCOFF_SET_TOC flag is
256 set), this is the offset in toc_section. */
258 /* If the TOC entry comes from an input file, this is set to the
259 symbol index of the C_HIDEXT XMC_TC or XMC_TD symbol. */
263 /* If this symbol is a function entry point which is called, this
264 field holds a pointer to the function descriptor. If this symbol
265 is a function descriptor, this field holds a pointer to the
266 function entry point. */
267 struct xcoff_link_hash_entry *descriptor;
269 /* The .loader symbol table entry, if there is one. */
270 struct internal_ldsym *ldsym;
272 /* The .loader symbol table index. */
275 /* Some linker flags. */
276 unsigned short flags;
277 /* Symbol is referenced by a regular object. */
278 #define XCOFF_REF_REGULAR (01)
279 /* Symbol is defined by a regular object. */
280 #define XCOFF_DEF_REGULAR (02)
281 /* Symbol is defined by a dynamic object. */
282 #define XCOFF_DEF_DYNAMIC (04)
283 /* Symbol is used in a reloc being copied into the .loader section. */
284 #define XCOFF_LDREL (010)
285 /* Symbol is the entry point. */
286 #define XCOFF_ENTRY (020)
287 /* Symbol is called; this is, it appears in a R_BR reloc. */
288 #define XCOFF_CALLED (040)
289 /* Symbol needs the TOC entry filled in. */
290 #define XCOFF_SET_TOC (0100)
291 /* Symbol is explicitly imported. */
292 #define XCOFF_IMPORT (0200)
293 /* Symbol is explicitly exported. */
294 #define XCOFF_EXPORT (0400)
295 /* Symbol has been processed by xcoff_build_ldsyms. */
296 #define XCOFF_BUILT_LDSYM (01000)
297 /* Symbol is mentioned by a section which was not garbage collected. */
298 #define XCOFF_MARK (02000)
299 /* Symbol size is recorded in size_list list from hash table. */
300 #define XCOFF_HAS_SIZE (04000)
301 /* Symbol is a function descriptor. */
302 #define XCOFF_DESCRIPTOR (010000)
304 /* The storage mapping class. */
305 unsigned char smclas;
308 /* The XCOFF linker hash table. */
310 struct xcoff_link_hash_table
312 struct bfd_link_hash_table root;
314 /* The .debug string hash table. We need to compute this while
315 reading the input files, so that we know how large the .debug
316 section will be before we assign section positions. */
317 struct bfd_strtab_hash *debug_strtab;
319 /* The .debug section we will use for the final output. */
320 asection *debug_section;
322 /* The .loader section we will use for the final output. */
323 asection *loader_section;
325 /* A count of non TOC relative relocs which will need to be
326 allocated in the .loader section. */
329 /* The .loader section header. */
330 struct internal_ldhdr ldhdr;
332 /* The .gl section we use to hold global linkage code. */
333 asection *linkage_section;
335 /* The .tc section we use to hold toc entries we build for global
337 asection *toc_section;
339 /* The .ds section we use to hold function descriptors which we
340 create for exported symbols. */
341 asection *descriptor_section;
343 /* The list of import files. */
344 struct xcoff_import_file *imports;
346 /* Required alignment of sections within the output file. */
347 unsigned long file_align;
349 /* Whether the .text section must be read-only. */
352 /* Whether garbage collection was done. */
355 /* A linked list of symbols for which we have size information. */
356 struct xcoff_link_size_list
358 struct xcoff_link_size_list *next;
359 struct xcoff_link_hash_entry *h;
363 /* Magic sections: _text, _etext, _data, _edata, _end, end. */
364 asection *special_sections[6];
367 /* Information we keep for each section in the output file during the
370 struct xcoff_link_section_info
372 /* The relocs to be output. */
373 struct internal_reloc *relocs;
374 /* For each reloc against a global symbol whose index was not known
375 when the reloc was handled, the global hash table entry. */
376 struct xcoff_link_hash_entry **rel_hashes;
377 /* If there is a TOC relative reloc against a global symbol, and the
378 index of the TOC symbol is not known when the reloc was handled,
379 an entry is added to this linked list. This is not an array,
380 like rel_hashes, because this case is quite uncommon. */
381 struct xcoff_toc_rel_hash
383 struct xcoff_toc_rel_hash *next;
384 struct xcoff_link_hash_entry *h;
385 struct internal_reloc *rel;
389 /* Information that we pass around while doing the final link step. */
391 struct xcoff_final_link_info
393 /* General link information. */
394 struct bfd_link_info *info;
397 /* Hash table for long symbol names. */
398 struct bfd_strtab_hash *strtab;
399 /* Array of information kept for each output section, indexed by the
400 target_index field. */
401 struct xcoff_link_section_info *section_info;
402 /* Symbol index of last C_FILE symbol (-1 if none). */
403 long last_file_index;
404 /* Contents of last C_FILE symbol. */
405 struct internal_syment last_file;
406 /* Symbol index of TOC symbol. */
408 /* Start of .loader symbols. */
409 struct external_ldsym *ldsym;
410 /* Next .loader reloc to swap out. */
411 struct external_ldrel *ldrel;
412 /* File position of start of line numbers. */
413 file_ptr line_filepos;
414 /* Buffer large enough to hold swapped symbols of any input file. */
415 struct internal_syment *internal_syms;
416 /* Buffer large enough to hold output indices of symbols of any
419 /* Buffer large enough to hold output symbols for any input file. */
421 /* Buffer large enough to hold external line numbers for any input
424 /* Buffer large enough to hold any input section. */
426 /* Buffer large enough to hold external relocs of any input section. */
427 bfd_byte *external_relocs;
430 static void xcoff_swap_ldhdr_in
431 PARAMS ((bfd *, const struct external_ldhdr *, struct internal_ldhdr *));
432 static void xcoff_swap_ldhdr_out
433 PARAMS ((bfd *, const struct internal_ldhdr *, struct external_ldhdr *));
434 static void xcoff_swap_ldsym_in
435 PARAMS ((bfd *, const struct external_ldsym *, struct internal_ldsym *));
436 static void xcoff_swap_ldsym_out
437 PARAMS ((bfd *, const struct internal_ldsym *, struct external_ldsym *));
438 static void xcoff_swap_ldrel_in
439 PARAMS ((bfd *, const struct external_ldrel *, struct internal_ldrel *));
440 static void xcoff_swap_ldrel_out
441 PARAMS ((bfd *, const struct internal_ldrel *, struct external_ldrel *));
442 static struct bfd_hash_entry *xcoff_link_hash_newfunc
443 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
444 static struct internal_reloc *xcoff_read_internal_relocs
445 PARAMS ((bfd *, asection *, boolean, bfd_byte *, boolean,
446 struct internal_reloc *));
447 static boolean xcoff_link_add_object_symbols
448 PARAMS ((bfd *, struct bfd_link_info *));
449 static boolean xcoff_link_check_archive_element
450 PARAMS ((bfd *, struct bfd_link_info *, boolean *));
451 static boolean xcoff_link_check_ar_symbols
452 PARAMS ((bfd *, struct bfd_link_info *, boolean *));
453 static boolean xcoff_link_check_dynamic_ar_symbols
454 PARAMS ((bfd *, struct bfd_link_info *, boolean *));
455 static bfd_size_type xcoff_find_reloc
456 PARAMS ((struct internal_reloc *, bfd_size_type, bfd_vma));
457 static boolean xcoff_link_add_symbols PARAMS ((bfd *, struct bfd_link_info *));
458 static boolean xcoff_link_add_dynamic_symbols
459 PARAMS ((bfd *, struct bfd_link_info *));
460 static boolean xcoff_mark PARAMS ((struct bfd_link_info *, asection *));
461 static void xcoff_sweep PARAMS ((struct bfd_link_info *));
462 static boolean xcoff_build_ldsyms
463 PARAMS ((struct xcoff_link_hash_entry *, PTR));
464 static boolean xcoff_link_input_bfd
465 PARAMS ((struct xcoff_final_link_info *, bfd *));
466 static boolean xcoff_write_global_symbol
467 PARAMS ((struct xcoff_link_hash_entry *, PTR));
468 static boolean xcoff_reloc_link_order
469 PARAMS ((bfd *, struct xcoff_final_link_info *, asection *,
470 struct bfd_link_order *));
471 static int xcoff_sort_relocs PARAMS ((const PTR, const PTR));
473 /* Routines to swap information in the XCOFF .loader section. If we
474 ever need to write an XCOFF loader, this stuff will need to be
475 moved to another file shared by the linker (which XCOFF calls the
476 ``binder'') and the loader. */
478 /* Swap in the ldhdr structure. */
481 xcoff_swap_ldhdr_in (abfd, src, dst)
483 const struct external_ldhdr *src;
484 struct internal_ldhdr *dst;
486 dst->l_version = bfd_get_32 (abfd, src->l_version);
487 dst->l_nsyms = bfd_get_32 (abfd, src->l_nsyms);
488 dst->l_nreloc = bfd_get_32 (abfd, src->l_nreloc);
489 dst->l_istlen = bfd_get_32 (abfd, src->l_istlen);
490 dst->l_nimpid = bfd_get_32 (abfd, src->l_nimpid);
491 dst->l_impoff = bfd_get_32 (abfd, src->l_impoff);
492 dst->l_stlen = bfd_get_32 (abfd, src->l_stlen);
493 dst->l_stoff = bfd_get_32 (abfd, src->l_stoff);
496 /* Swap out the ldhdr structure. */
499 xcoff_swap_ldhdr_out (abfd, src, dst)
501 const struct internal_ldhdr *src;
502 struct external_ldhdr *dst;
504 bfd_put_32 (abfd, src->l_version, dst->l_version);
505 bfd_put_32 (abfd, src->l_nsyms, dst->l_nsyms);
506 bfd_put_32 (abfd, src->l_nreloc, dst->l_nreloc);
507 bfd_put_32 (abfd, src->l_istlen, dst->l_istlen);
508 bfd_put_32 (abfd, src->l_nimpid, dst->l_nimpid);
509 bfd_put_32 (abfd, src->l_impoff, dst->l_impoff);
510 bfd_put_32 (abfd, src->l_stlen, dst->l_stlen);
511 bfd_put_32 (abfd, src->l_stoff, dst->l_stoff);
514 /* Swap in the ldsym structure. */
517 xcoff_swap_ldsym_in (abfd, src, dst)
519 const struct external_ldsym *src;
520 struct internal_ldsym *dst;
522 if (bfd_get_32 (abfd, src->_l._l_l._l_zeroes) != 0)
523 memcpy (dst->_l._l_name, src->_l._l_name, SYMNMLEN);
526 dst->_l._l_l._l_zeroes = 0;
527 dst->_l._l_l._l_offset = bfd_get_32 (abfd, src->_l._l_l._l_offset);
529 dst->l_value = bfd_get_32 (abfd, src->l_value);
530 dst->l_scnum = bfd_get_16 (abfd, src->l_scnum);
531 dst->l_smtype = bfd_get_8 (abfd, src->l_smtype);
532 dst->l_smclas = bfd_get_8 (abfd, src->l_smclas);
533 dst->l_ifile = bfd_get_32 (abfd, src->l_ifile);
534 dst->l_parm = bfd_get_32 (abfd, src->l_parm);
537 /* Swap out the ldsym structure. */
540 xcoff_swap_ldsym_out (abfd, src, dst)
542 const struct internal_ldsym *src;
543 struct external_ldsym *dst;
545 if (src->_l._l_l._l_zeroes != 0)
546 memcpy (dst->_l._l_name, src->_l._l_name, SYMNMLEN);
549 bfd_put_32 (abfd, 0, dst->_l._l_l._l_zeroes);
550 bfd_put_32 (abfd, src->_l._l_l._l_offset, dst->_l._l_l._l_offset);
552 bfd_put_32 (abfd, src->l_value, dst->l_value);
553 bfd_put_16 (abfd, src->l_scnum, dst->l_scnum);
554 bfd_put_8 (abfd, src->l_smtype, dst->l_smtype);
555 bfd_put_8 (abfd, src->l_smclas, dst->l_smclas);
556 bfd_put_32 (abfd, src->l_ifile, dst->l_ifile);
557 bfd_put_32 (abfd, src->l_parm, dst->l_parm);
560 /* Swap in the ldrel structure. */
563 xcoff_swap_ldrel_in (abfd, src, dst)
565 const struct external_ldrel *src;
566 struct internal_ldrel *dst;
568 dst->l_vaddr = bfd_get_32 (abfd, src->l_vaddr);
569 dst->l_symndx = bfd_get_32 (abfd, src->l_symndx);
570 dst->l_rtype = bfd_get_16 (abfd, src->l_rtype);
571 dst->l_rsecnm = bfd_get_16 (abfd, src->l_rsecnm);
574 /* Swap out the ldrel structure. */
577 xcoff_swap_ldrel_out (abfd, src, dst)
579 const struct internal_ldrel *src;
580 struct external_ldrel *dst;
582 bfd_put_32 (abfd, src->l_vaddr, dst->l_vaddr);
583 bfd_put_32 (abfd, src->l_symndx, dst->l_symndx);
584 bfd_put_16 (abfd, src->l_rtype, dst->l_rtype);
585 bfd_put_16 (abfd, src->l_rsecnm, dst->l_rsecnm);
588 /* Routines to read XCOFF dynamic information. This don't really
589 belong here, but we already have the ldsym manipulation routines
592 /* Read the contents of a section. */
595 xcoff_get_section_contents (abfd, sec)
599 if (coff_section_data (abfd, sec) == NULL)
601 sec->used_by_bfd = bfd_zalloc (abfd,
602 sizeof (struct coff_section_tdata));
603 if (sec->used_by_bfd == NULL)
607 if (coff_section_data (abfd, sec)->contents == NULL)
609 coff_section_data (abfd, sec)->contents = bfd_malloc (sec->_raw_size);
610 if (coff_section_data (abfd, sec)->contents == NULL)
613 if (! bfd_get_section_contents (abfd, sec,
614 coff_section_data (abfd, sec)->contents,
615 (file_ptr) 0, sec->_raw_size))
622 /* Get the size required to hold the dynamic symbols. */
625 _bfd_xcoff_get_dynamic_symtab_upper_bound (abfd)
630 struct internal_ldhdr ldhdr;
632 if ((abfd->flags & DYNAMIC) == 0)
634 bfd_set_error (bfd_error_invalid_operation);
638 lsec = bfd_get_section_by_name (abfd, ".loader");
641 bfd_set_error (bfd_error_no_symbols);
645 if (! xcoff_get_section_contents (abfd, lsec))
647 contents = coff_section_data (abfd, lsec)->contents;
649 xcoff_swap_ldhdr_in (abfd, (struct external_ldhdr *) contents, &ldhdr);
651 return (ldhdr.l_nsyms + 1) * sizeof (asymbol *);
654 /* Get the dynamic symbols. */
657 _bfd_xcoff_canonicalize_dynamic_symtab (abfd, psyms)
663 struct internal_ldhdr ldhdr;
665 struct external_ldsym *elsym, *elsymend;
666 coff_symbol_type *symbuf;
668 if ((abfd->flags & DYNAMIC) == 0)
670 bfd_set_error (bfd_error_invalid_operation);
674 lsec = bfd_get_section_by_name (abfd, ".loader");
677 bfd_set_error (bfd_error_no_symbols);
681 if (! xcoff_get_section_contents (abfd, lsec))
683 contents = coff_section_data (abfd, lsec)->contents;
685 coff_section_data (abfd, lsec)->keep_contents = true;
687 xcoff_swap_ldhdr_in (abfd, (struct external_ldhdr *) contents, &ldhdr);
689 strings = (char *) contents + ldhdr.l_stoff;
691 symbuf = ((coff_symbol_type *)
692 bfd_zalloc (abfd, ldhdr.l_nsyms * sizeof (coff_symbol_type)));
696 elsym = (struct external_ldsym *) (contents + LDHDRSZ);
697 elsymend = elsym + ldhdr.l_nsyms;
698 for (; elsym < elsymend; elsym++, symbuf++, psyms++)
700 struct internal_ldsym ldsym;
702 xcoff_swap_ldsym_in (abfd, elsym, &ldsym);
704 symbuf->symbol.the_bfd = abfd;
706 if (ldsym._l._l_l._l_zeroes == 0)
707 symbuf->symbol.name = strings + ldsym._l._l_l._l_offset;
712 for (i = 0; i < SYMNMLEN; i++)
713 if (ldsym._l._l_name[i] == '\0')
716 symbuf->symbol.name = elsym->_l._l_name;
721 c = bfd_alloc (abfd, SYMNMLEN + 1);
724 memcpy (c, ldsym._l._l_name, SYMNMLEN);
726 symbuf->symbol.name = c;
730 if (ldsym.l_smclas == XMC_XO)
731 symbuf->symbol.section = bfd_abs_section_ptr;
733 symbuf->symbol.section = coff_section_from_bfd_index (abfd,
735 symbuf->symbol.value = ldsym.l_value - symbuf->symbol.section->vma;
737 symbuf->symbol.flags = BSF_NO_FLAGS;
738 if ((ldsym.l_smtype & L_EXPORT) != 0)
739 symbuf->symbol.flags |= BSF_GLOBAL;
741 /* FIXME: We have no way to record the other information stored
742 with the loader symbol. */
744 *psyms = (asymbol *) symbuf;
749 return ldhdr.l_nsyms;
752 /* Get the size required to hold the dynamic relocs. */
755 _bfd_xcoff_get_dynamic_reloc_upper_bound (abfd)
760 struct internal_ldhdr ldhdr;
762 if ((abfd->flags & DYNAMIC) == 0)
764 bfd_set_error (bfd_error_invalid_operation);
768 lsec = bfd_get_section_by_name (abfd, ".loader");
771 bfd_set_error (bfd_error_no_symbols);
775 if (! xcoff_get_section_contents (abfd, lsec))
777 contents = coff_section_data (abfd, lsec)->contents;
779 xcoff_swap_ldhdr_in (abfd, (struct external_ldhdr *) contents, &ldhdr);
781 return (ldhdr.l_nreloc + 1) * sizeof (arelent *);
784 /* The typical dynamic reloc. */
786 static reloc_howto_type xcoff_dynamic_reloc =
789 2, /* size (0 = byte, 1 = short, 2 = long) */
791 false, /* pc_relative */
793 complain_overflow_bitfield, /* complain_on_overflow */
794 0, /* special_function */
796 true, /* partial_inplace */
797 0xffffffff, /* src_mask */
798 0xffffffff, /* dst_mask */
799 false); /* pcrel_offset */
801 /* Get the dynamic relocs. */
804 _bfd_xcoff_canonicalize_dynamic_reloc (abfd, prelocs, syms)
811 struct internal_ldhdr ldhdr;
813 struct external_ldrel *elrel, *elrelend;
815 if ((abfd->flags & DYNAMIC) == 0)
817 bfd_set_error (bfd_error_invalid_operation);
821 lsec = bfd_get_section_by_name (abfd, ".loader");
824 bfd_set_error (bfd_error_no_symbols);
828 if (! xcoff_get_section_contents (abfd, lsec))
830 contents = coff_section_data (abfd, lsec)->contents;
832 xcoff_swap_ldhdr_in (abfd, (struct external_ldhdr *) contents, &ldhdr);
834 relbuf = (arelent *) bfd_alloc (abfd, ldhdr.l_nreloc * sizeof (arelent));
838 elrel = ((struct external_ldrel *)
839 (contents + LDHDRSZ + ldhdr.l_nsyms * LDSYMSZ));
840 elrelend = elrel + ldhdr.l_nreloc;
841 for (; elrel < elrelend; elrel++, relbuf++, prelocs++)
843 struct internal_ldrel ldrel;
845 xcoff_swap_ldrel_in (abfd, elrel, &ldrel);
847 if (ldrel.l_symndx >= 3)
848 relbuf->sym_ptr_ptr = syms + (ldrel.l_symndx - 3);
854 switch (ldrel.l_symndx)
870 sec = bfd_get_section_by_name (abfd, name);
873 bfd_set_error (bfd_error_bad_value);
877 relbuf->sym_ptr_ptr = sec->symbol_ptr_ptr;
880 relbuf->address = ldrel.l_vaddr;
883 /* Most dynamic relocs have the same type. FIXME: This is only
884 correct if ldrel.l_rtype == 0. In other cases, we should use
885 a different howto. */
886 relbuf->howto = &xcoff_dynamic_reloc;
888 /* FIXME: We have no way to record the l_rsecnm field. */
895 return ldhdr.l_nreloc;
898 /* Routine to create an entry in an XCOFF link hash table. */
900 static struct bfd_hash_entry *
901 xcoff_link_hash_newfunc (entry, table, string)
902 struct bfd_hash_entry *entry;
903 struct bfd_hash_table *table;
906 struct xcoff_link_hash_entry *ret = (struct xcoff_link_hash_entry *) entry;
908 /* Allocate the structure if it has not already been allocated by a
910 if (ret == (struct xcoff_link_hash_entry *) NULL)
911 ret = ((struct xcoff_link_hash_entry *)
912 bfd_hash_allocate (table, sizeof (struct xcoff_link_hash_entry)));
913 if (ret == (struct xcoff_link_hash_entry *) NULL)
914 return (struct bfd_hash_entry *) ret;
916 /* Call the allocation method of the superclass. */
917 ret = ((struct xcoff_link_hash_entry *)
918 _bfd_link_hash_newfunc ((struct bfd_hash_entry *) ret,
922 /* Set local fields. */
924 ret->toc_section = NULL;
925 ret->u.toc_indx = -1;
926 ret->descriptor = NULL;
930 ret->smclas = XMC_UA;
933 return (struct bfd_hash_entry *) ret;
936 /* Create a XCOFF link hash table. */
938 struct bfd_link_hash_table *
939 _bfd_xcoff_bfd_link_hash_table_create (abfd)
942 struct xcoff_link_hash_table *ret;
944 ret = ((struct xcoff_link_hash_table *)
945 bfd_alloc (abfd, sizeof (struct xcoff_link_hash_table)));
946 if (ret == (struct xcoff_link_hash_table *) NULL)
947 return (struct bfd_link_hash_table *) NULL;
948 if (! _bfd_link_hash_table_init (&ret->root, abfd, xcoff_link_hash_newfunc))
950 bfd_release (abfd, ret);
951 return (struct bfd_link_hash_table *) NULL;
954 ret->debug_strtab = _bfd_xcoff_stringtab_init ();
955 ret->debug_section = NULL;
956 ret->loader_section = NULL;
957 ret->ldrel_count = 0;
958 memset (&ret->ldhdr, 0, sizeof (struct internal_ldhdr));
959 ret->linkage_section = NULL;
960 ret->toc_section = NULL;
961 ret->descriptor_section = NULL;
966 memset (ret->special_sections, 0, sizeof ret->special_sections);
968 /* The linker will always generate a full a.out header. We need to
969 record that fact now, before the sizeof_headers routine could be
971 xcoff_data (abfd)->full_aouthdr = true;
976 /* Look up an entry in an XCOFF link hash table. */
978 #define xcoff_link_hash_lookup(table, string, create, copy, follow) \
979 ((struct xcoff_link_hash_entry *) \
980 bfd_link_hash_lookup (&(table)->root, (string), (create), (copy),\
983 /* Traverse an XCOFF link hash table. */
985 #define xcoff_link_hash_traverse(table, func, info) \
986 (bfd_link_hash_traverse \
988 (boolean (*) PARAMS ((struct bfd_link_hash_entry *, PTR))) (func), \
991 /* Get the XCOFF link hash table from the info structure. This is
994 #define xcoff_hash_table(p) ((struct xcoff_link_hash_table *) ((p)->hash))
996 /* Read internal relocs for an XCOFF csect. This is a wrapper around
997 _bfd_coff_read_internal_relocs which tries to take advantage of any
998 relocs which may have been cached for the enclosing section. */
1000 static struct internal_reloc *
1001 xcoff_read_internal_relocs (abfd, sec, cache, external_relocs,
1002 require_internal, internal_relocs)
1006 bfd_byte *external_relocs;
1007 boolean require_internal;
1008 struct internal_reloc *internal_relocs;
1010 if (coff_section_data (abfd, sec) != NULL
1011 && coff_section_data (abfd, sec)->relocs == NULL
1012 && xcoff_section_data (abfd, sec) != NULL)
1014 asection *enclosing;
1016 enclosing = xcoff_section_data (abfd, sec)->enclosing;
1018 if (enclosing != NULL
1019 && (coff_section_data (abfd, enclosing) == NULL
1020 || coff_section_data (abfd, enclosing)->relocs == NULL)
1022 && enclosing->reloc_count > 0)
1024 if (_bfd_coff_read_internal_relocs (abfd, enclosing, true,
1025 external_relocs, false,
1026 (struct internal_reloc *) NULL)
1031 if (enclosing != NULL
1032 && coff_section_data (abfd, enclosing) != NULL
1033 && coff_section_data (abfd, enclosing)->relocs != NULL)
1037 off = ((sec->rel_filepos - enclosing->rel_filepos)
1038 / bfd_coff_relsz (abfd));
1039 if (! require_internal)
1040 return coff_section_data (abfd, enclosing)->relocs + off;
1041 memcpy (internal_relocs,
1042 coff_section_data (abfd, enclosing)->relocs + off,
1043 sec->reloc_count * sizeof (struct internal_reloc));
1044 return internal_relocs;
1048 return _bfd_coff_read_internal_relocs (abfd, sec, cache, external_relocs,
1049 require_internal, internal_relocs);
1052 /* Given an XCOFF BFD, add symbols to the global hash table as
1056 _bfd_xcoff_bfd_link_add_symbols (abfd, info)
1058 struct bfd_link_info *info;
1060 switch (bfd_get_format (abfd))
1063 return xcoff_link_add_object_symbols (abfd, info);
1066 /* If the archive has a map, do the usual search. We then need
1067 to check the archive for stripped dynamic objects, because
1068 they will not appear in the archive map even though they
1069 should, perhaps, be included. If the archive has no map, we
1070 just consider each object file in turn, since that apparently
1071 is what the AIX native linker does. */
1072 if (bfd_has_map (abfd))
1074 if (! (_bfd_generic_link_add_archive_symbols
1075 (abfd, info, xcoff_link_check_archive_element)))
1082 member = bfd_openr_next_archived_file (abfd, (bfd *) NULL);
1083 while (member != NULL)
1085 if (bfd_check_format (member, bfd_object)
1086 && (! bfd_has_map (abfd)
1087 || ((member->flags & DYNAMIC) != 0
1088 && (member->flags & HAS_SYMS) == 0)))
1092 if (! xcoff_link_check_archive_element (member, info, &needed))
1095 member->archive_pass = -1;
1097 member = bfd_openr_next_archived_file (abfd, member);
1104 bfd_set_error (bfd_error_wrong_format);
1109 /* Add symbols from an XCOFF object file. */
1112 xcoff_link_add_object_symbols (abfd, info)
1114 struct bfd_link_info *info;
1116 if (! _bfd_coff_get_external_symbols (abfd))
1118 if (! xcoff_link_add_symbols (abfd, info))
1120 if (! info->keep_memory)
1122 if (! _bfd_coff_free_symbols (abfd))
1128 /* Check a single archive element to see if we need to include it in
1129 the link. *PNEEDED is set according to whether this element is
1130 needed in the link or not. This is called via
1131 _bfd_generic_link_add_archive_symbols. */
1134 xcoff_link_check_archive_element (abfd, info, pneeded)
1136 struct bfd_link_info *info;
1139 if (! _bfd_coff_get_external_symbols (abfd))
1142 if (! xcoff_link_check_ar_symbols (abfd, info, pneeded))
1147 if (! xcoff_link_add_symbols (abfd, info))
1151 if (! info->keep_memory || ! *pneeded)
1153 if (! _bfd_coff_free_symbols (abfd))
1160 /* Look through the symbols to see if this object file should be
1161 included in the link. */
1164 xcoff_link_check_ar_symbols (abfd, info, pneeded)
1166 struct bfd_link_info *info;
1169 bfd_size_type symesz;
1175 if ((abfd->flags & DYNAMIC) != 0
1176 && ! info->static_link
1177 && info->hash->creator == abfd->xvec)
1178 return xcoff_link_check_dynamic_ar_symbols (abfd, info, pneeded);
1180 symesz = bfd_coff_symesz (abfd);
1181 esym = (bfd_byte *) obj_coff_external_syms (abfd);
1182 esym_end = esym + obj_raw_syment_count (abfd) * symesz;
1183 while (esym < esym_end)
1185 struct internal_syment sym;
1187 bfd_coff_swap_sym_in (abfd, (PTR) esym, (PTR) &sym);
1189 if (sym.n_sclass == C_EXT && sym.n_scnum != N_UNDEF)
1192 char buf[SYMNMLEN + 1];
1193 struct bfd_link_hash_entry *h;
1195 /* This symbol is externally visible, and is defined by this
1198 name = _bfd_coff_internal_syment_name (abfd, &sym, buf);
1201 h = bfd_link_hash_lookup (info->hash, name, false, false, true);
1203 /* We are only interested in symbols that are currently
1204 undefined. If a symbol is currently known to be common,
1205 XCOFF linkers do not bring in an object file which
1206 defines it. We also don't bring in symbols to satisfy
1207 undefined references in shared objects. */
1208 if (h != (struct bfd_link_hash_entry *) NULL
1209 && h->type == bfd_link_hash_undefined
1210 && (info->hash->creator != abfd->xvec
1211 || (((struct xcoff_link_hash_entry *) h)->flags
1212 & XCOFF_DEF_DYNAMIC) == 0))
1214 if (! (*info->callbacks->add_archive_element) (info, abfd, name))
1221 esym += (sym.n_numaux + 1) * symesz;
1224 /* We do not need this object file. */
1228 /* Look through the loader symbols to see if this dynamic object
1229 should be included in the link. The native linker uses the loader
1230 symbols, not the normal symbol table, so we do too. */
1233 xcoff_link_check_dynamic_ar_symbols (abfd, info, pneeded)
1235 struct bfd_link_info *info;
1240 struct internal_ldhdr ldhdr;
1241 const char *strings;
1242 struct external_ldsym *elsym, *elsymend;
1246 lsec = bfd_get_section_by_name (abfd, ".loader");
1249 /* There are no symbols, so don't try to include it. */
1253 if (! xcoff_get_section_contents (abfd, lsec))
1255 buf = coff_section_data (abfd, lsec)->contents;
1257 xcoff_swap_ldhdr_in (abfd, (struct external_ldhdr *) buf, &ldhdr);
1259 strings = (char *) buf + ldhdr.l_stoff;
1261 elsym = (struct external_ldsym *) (buf + LDHDRSZ);
1262 elsymend = elsym + ldhdr.l_nsyms;
1263 for (; elsym < elsymend; elsym++)
1265 struct internal_ldsym ldsym;
1266 char nambuf[SYMNMLEN + 1];
1268 struct bfd_link_hash_entry *h;
1270 xcoff_swap_ldsym_in (abfd, elsym, &ldsym);
1272 /* We are only interested in exported symbols. */
1273 if ((ldsym.l_smtype & L_EXPORT) == 0)
1276 if (ldsym._l._l_l._l_zeroes == 0)
1277 name = strings + ldsym._l._l_l._l_offset;
1280 memcpy (nambuf, ldsym._l._l_name, SYMNMLEN);
1281 nambuf[SYMNMLEN] = '\0';
1285 h = bfd_link_hash_lookup (info->hash, name, false, false, true);
1287 /* We are only interested in symbols that are currently
1288 undefined. At this point we know that we are using an XCOFF
1291 && h->type == bfd_link_hash_undefined
1292 && (((struct xcoff_link_hash_entry *) h)->flags
1293 & XCOFF_DEF_DYNAMIC) == 0)
1295 if (! (*info->callbacks->add_archive_element) (info, abfd, name))
1302 /* We do not need this shared object. */
1304 if (buf != NULL && ! coff_section_data (abfd, lsec)->keep_contents)
1306 free (coff_section_data (abfd, lsec)->contents);
1307 coff_section_data (abfd, lsec)->contents = NULL;
1313 /* Returns the index of reloc in RELOCS with the least address greater
1314 than or equal to ADDRESS. The relocs are sorted by address. */
1316 static bfd_size_type
1317 xcoff_find_reloc (relocs, count, address)
1318 struct internal_reloc *relocs;
1319 bfd_size_type count;
1322 bfd_size_type min, max, this;
1326 if (count == 1 && relocs[0].r_vaddr < address)
1335 /* Do a binary search over (min,max]. */
1336 while (min + 1 < max)
1340 this = (max + min) / 2;
1341 raddr = relocs[this].r_vaddr;
1342 if (raddr > address)
1344 else if (raddr < address)
1353 if (relocs[min].r_vaddr < address)
1357 && relocs[min - 1].r_vaddr == address)
1363 /* Add all the symbols from an object file to the hash table.
1365 XCOFF is a weird format. A normal XCOFF .o files will have three
1366 COFF sections--.text, .data, and .bss--but each COFF section will
1367 contain many csects. These csects are described in the symbol
1368 table. From the linker's point of view, each csect must be
1369 considered a section in its own right. For example, a TOC entry is
1370 handled as a small XMC_TC csect. The linker must be able to merge
1371 different TOC entries together, which means that it must be able to
1372 extract the XMC_TC csects from the .data section of the input .o
1375 From the point of view of our linker, this is, of course, a hideous
1376 nightmare. We cope by actually creating sections for each csect,
1377 and discarding the original sections. We then have to handle the
1378 relocation entries carefully, since the only way to tell which
1379 csect they belong to is to examine the address. */
1382 xcoff_link_add_symbols (abfd, info)
1384 struct bfd_link_info *info;
1386 unsigned int n_tmask;
1387 unsigned int n_btshft;
1388 boolean default_copy;
1389 bfd_size_type symcount;
1390 struct xcoff_link_hash_entry **sym_hash;
1391 asection **csect_cache;
1392 bfd_size_type linesz;
1394 asection *last_real;
1397 unsigned int csect_index;
1398 asection *first_csect;
1399 bfd_size_type symesz;
1402 struct reloc_info_struct
1404 struct internal_reloc *relocs;
1407 } *reloc_info = NULL;
1409 if ((abfd->flags & DYNAMIC) != 0
1410 && ! info->static_link)
1412 if (! xcoff_link_add_dynamic_symbols (abfd, info))
1416 if (info->hash->creator == abfd->xvec)
1418 /* We need to build a .loader section, so we do it here. This
1419 won't work if we're producing an XCOFF output file with no
1420 XCOFF input files. FIXME. */
1421 if (xcoff_hash_table (info)->loader_section == NULL)
1425 lsec = bfd_make_section_anyway (abfd, ".loader");
1428 xcoff_hash_table (info)->loader_section = lsec;
1429 lsec->flags |= SEC_HAS_CONTENTS | SEC_IN_MEMORY;
1431 /* Likewise for the linkage section. */
1432 if (xcoff_hash_table (info)->linkage_section == NULL)
1436 lsec = bfd_make_section_anyway (abfd, ".gl");
1439 xcoff_hash_table (info)->linkage_section = lsec;
1440 lsec->flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
1442 lsec->alignment_power = 2;
1444 /* Likewise for the TOC section. */
1445 if (xcoff_hash_table (info)->toc_section == NULL)
1449 tsec = bfd_make_section_anyway (abfd, ".tc");
1452 xcoff_hash_table (info)->toc_section = tsec;
1453 tsec->flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
1455 tsec->alignment_power = 2;
1457 /* Likewise for the descriptor section. */
1458 if (xcoff_hash_table (info)->descriptor_section == NULL)
1462 dsec = bfd_make_section_anyway (abfd, ".ds");
1465 xcoff_hash_table (info)->descriptor_section = dsec;
1466 dsec->flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
1468 dsec->alignment_power = 2;
1470 /* Likewise for the .debug section. */
1471 if (xcoff_hash_table (info)->debug_section == NULL)
1475 dsec = bfd_make_section_anyway (abfd, ".debug");
1478 xcoff_hash_table (info)->debug_section = dsec;
1479 dsec->flags |= SEC_HAS_CONTENTS | SEC_IN_MEMORY;
1483 if ((abfd->flags & DYNAMIC) != 0
1484 && ! info->static_link)
1487 n_tmask = coff_data (abfd)->local_n_tmask;
1488 n_btshft = coff_data (abfd)->local_n_btshft;
1490 /* Define macros so that ISFCN, et. al., macros work correctly. */
1491 #define N_TMASK n_tmask
1492 #define N_BTSHFT n_btshft
1494 if (info->keep_memory)
1495 default_copy = false;
1497 default_copy = true;
1499 symcount = obj_raw_syment_count (abfd);
1501 /* We keep a list of the linker hash table entries that correspond
1502 to each external symbol. */
1503 sym_hash = ((struct xcoff_link_hash_entry **)
1506 * sizeof (struct xcoff_link_hash_entry *))));
1507 if (sym_hash == NULL && symcount != 0)
1509 coff_data (abfd)->sym_hashes = (struct coff_link_hash_entry **) sym_hash;
1510 memset (sym_hash, 0,
1511 (size_t) symcount * sizeof (struct xcoff_link_hash_entry *));
1513 /* Because of the weird stuff we are doing with XCOFF csects, we can
1514 not easily determine which section a symbol is in, so we store
1515 the information in the tdata for the input file. */
1516 csect_cache = ((asection **)
1517 bfd_alloc (abfd, symcount * sizeof (asection *)));
1518 if (csect_cache == NULL && symcount != 0)
1520 xcoff_data (abfd)->csects = csect_cache;
1521 memset (csect_cache, 0, (size_t) symcount * sizeof (asection *));
1523 /* While splitting sections into csects, we need to assign the
1524 relocs correctly. The relocs and the csects must both be in
1525 order by VMA within a given section, so we handle this by
1526 scanning along the relocs as we process the csects. We index
1527 into reloc_info using the section target_index. */
1528 reloc_info = ((struct reloc_info_struct *)
1529 bfd_malloc ((abfd->section_count + 1)
1530 * sizeof (struct reloc_info_struct)));
1531 if (reloc_info == NULL)
1533 memset ((PTR) reloc_info, 0,
1534 (abfd->section_count + 1) * sizeof (struct reloc_info_struct));
1536 /* Read in the relocs and line numbers for each section. */
1537 linesz = bfd_coff_linesz (abfd);
1539 for (o = abfd->sections; o != NULL; o = o->next)
1542 if ((o->flags & SEC_RELOC) != 0)
1544 reloc_info[o->target_index].relocs =
1545 xcoff_read_internal_relocs (abfd, o, true, (bfd_byte *) NULL,
1546 false, (struct internal_reloc *) NULL);
1547 reloc_info[o->target_index].csects =
1548 (asection **) bfd_malloc (o->reloc_count * sizeof (asection *));
1549 if (reloc_info[o->target_index].csects == NULL)
1551 memset (reloc_info[o->target_index].csects, 0,
1552 o->reloc_count * sizeof (asection *));
1555 if ((info->strip == strip_none || info->strip == strip_some)
1556 && o->lineno_count > 0)
1560 linenos = (bfd_byte *) bfd_malloc (o->lineno_count * linesz);
1561 if (linenos == NULL)
1563 reloc_info[o->target_index].linenos = linenos;
1564 if (bfd_seek (abfd, o->line_filepos, SEEK_SET) != 0
1565 || (bfd_read (linenos, linesz, o->lineno_count, abfd)
1566 != linesz * o->lineno_count))
1571 /* Don't let the linker relocation routines discard the symbols. */
1572 keep_syms = obj_coff_keep_syms (abfd);
1573 obj_coff_keep_syms (abfd) = true;
1579 symesz = bfd_coff_symesz (abfd);
1580 BFD_ASSERT (symesz == bfd_coff_auxesz (abfd));
1581 esym = (bfd_byte *) obj_coff_external_syms (abfd);
1582 esym_end = esym + symcount * symesz;
1583 while (esym < esym_end)
1585 struct internal_syment sym;
1586 union internal_auxent aux;
1588 char buf[SYMNMLEN + 1];
1593 struct xcoff_link_hash_entry *set_toc;
1595 bfd_coff_swap_sym_in (abfd, (PTR) esym, (PTR) &sym);
1597 /* In this pass we are only interested in symbols with csect
1599 if (sym.n_sclass != C_EXT && sym.n_sclass != C_HIDEXT)
1601 if (sym.n_sclass == C_FILE && csect != NULL)
1603 xcoff_section_data (abfd, csect)->last_symndx =
1605 - (bfd_byte *) obj_coff_external_syms (abfd))
1611 *csect_cache = csect;
1612 else if (first_csect == NULL || sym.n_sclass == C_FILE)
1613 *csect_cache = coff_section_from_bfd_index (abfd, sym.n_scnum);
1615 *csect_cache = NULL;
1616 esym += (sym.n_numaux + 1) * symesz;
1617 sym_hash += sym.n_numaux + 1;
1618 csect_cache += sym.n_numaux + 1;
1622 name = _bfd_coff_internal_syment_name (abfd, &sym, buf);
1626 /* If this symbol has line number information attached to it,
1627 and we're not stripping it, count the number of entries and
1628 add them to the count for this csect. In the final link pass
1629 we are going to attach line number information by symbol,
1630 rather than by section, in order to more easily handle
1631 garbage collection. */
1632 if ((info->strip == strip_none || info->strip == strip_some)
1635 && ISFCN (sym.n_type))
1637 union internal_auxent auxlin;
1639 bfd_coff_swap_aux_in (abfd, (PTR) (esym + symesz),
1640 sym.n_type, sym.n_sclass,
1641 0, sym.n_numaux, (PTR) &auxlin);
1642 if (auxlin.x_sym.x_fcnary.x_fcn.x_lnnoptr != 0)
1644 asection *enclosing;
1645 bfd_size_type linoff;
1647 enclosing = xcoff_section_data (abfd, csect)->enclosing;
1648 if (enclosing == NULL)
1650 (*_bfd_error_handler)
1651 ("%s: `%s' has line numbers but no enclosing section",
1652 bfd_get_filename (abfd), name);
1653 bfd_set_error (bfd_error_bad_value);
1656 linoff = (auxlin.x_sym.x_fcnary.x_fcn.x_lnnoptr
1657 - enclosing->line_filepos);
1658 if (linoff < enclosing->lineno_count * linesz)
1660 struct internal_lineno lin;
1661 bfd_byte *linpstart;
1663 linpstart = (reloc_info[enclosing->target_index].linenos
1665 bfd_coff_swap_lineno_in (abfd, (PTR) linpstart, (PTR) &lin);
1667 && ((bfd_size_type) lin.l_addr.l_symndx
1669 - (bfd_byte *) obj_coff_external_syms (abfd))
1672 bfd_byte *linpend, *linp;
1674 linpend = (reloc_info[enclosing->target_index].linenos
1675 + enclosing->lineno_count * linesz);
1676 for (linp = linpstart + linesz;
1680 bfd_coff_swap_lineno_in (abfd, (PTR) linp,
1682 if (lin.l_lnno == 0)
1685 csect->lineno_count += (linp - linpstart) / linesz;
1686 /* The setting of line_filepos will only be
1687 useful if all the line number entries for a
1688 csect are contiguous; this only matters for
1690 if (csect->line_filepos == 0)
1691 csect->line_filepos =
1692 auxlin.x_sym.x_fcnary.x_fcn.x_lnnoptr;
1698 /* Pick up the csect auxiliary information. */
1700 if (sym.n_numaux == 0)
1702 (*_bfd_error_handler)
1703 ("%s: class %d symbol `%s' has no aux entries",
1704 bfd_get_filename (abfd), sym.n_sclass, name);
1705 bfd_set_error (bfd_error_bad_value);
1709 bfd_coff_swap_aux_in (abfd,
1710 (PTR) (esym + symesz * sym.n_numaux),
1711 sym.n_type, sym.n_sclass,
1712 sym.n_numaux - 1, sym.n_numaux,
1715 smtyp = SMTYP_SMTYP (aux.x_csect.x_smtyp);
1725 (*_bfd_error_handler)
1726 ("%s: symbol `%s' has unrecognized csect type %d",
1727 bfd_get_filename (abfd), name, smtyp);
1728 bfd_set_error (bfd_error_bad_value);
1732 /* This is an external reference. */
1733 if (sym.n_sclass == C_HIDEXT
1734 || sym.n_scnum != N_UNDEF
1735 || aux.x_csect.x_scnlen.l != 0)
1737 (*_bfd_error_handler)
1738 ("%s: bad XTY_ER symbol `%s': class %d scnum %d scnlen %d",
1739 bfd_get_filename (abfd), name, sym.n_sclass, sym.n_scnum,
1740 aux.x_csect.x_scnlen.l);
1741 bfd_set_error (bfd_error_bad_value);
1745 /* An XMC_XO external reference is actually a reference to
1746 an absolute location. */
1747 if (aux.x_csect.x_smclas != XMC_XO)
1748 section = bfd_und_section_ptr;
1751 section = bfd_abs_section_ptr;
1752 value = sym.n_value;
1757 /* This is a csect definition. */
1761 xcoff_section_data (abfd, csect)->last_symndx =
1763 - (bfd_byte *) obj_coff_external_syms (abfd))
1770 /* When we see a TOC anchor, we record the TOC value. */
1771 if (aux.x_csect.x_smclas == XMC_TC0)
1773 if (sym.n_sclass != C_HIDEXT
1774 || aux.x_csect.x_scnlen.l != 0)
1776 (*_bfd_error_handler)
1777 ("%s: XMC_TC0 symbol `%s' is class %d scnlen %d",
1778 bfd_get_filename (abfd), name, sym.n_sclass,
1779 aux.x_csect.x_scnlen.l);
1780 bfd_set_error (bfd_error_bad_value);
1783 xcoff_data (abfd)->toc = sym.n_value;
1786 /* We must merge TOC entries for the same symbol. We can
1787 merge two TOC entries if they are both C_HIDEXT, they
1788 both have the same name, they are both 4 bytes long, and
1789 they both have a relocation table entry for an external
1790 symbol with the same name. Unfortunately, this means
1791 that we must look through the relocations. Ick. */
1792 if (aux.x_csect.x_smclas == XMC_TC
1793 && sym.n_sclass == C_HIDEXT
1794 && aux.x_csect.x_scnlen.l == 4
1795 && info->hash->creator == abfd->xvec)
1797 asection *enclosing;
1798 struct internal_reloc *relocs;
1799 bfd_size_type relindx;
1800 struct internal_reloc *rel;
1802 enclosing = coff_section_from_bfd_index (abfd, sym.n_scnum);
1803 if (enclosing == NULL)
1806 relocs = reloc_info[enclosing->target_index].relocs;
1807 relindx = xcoff_find_reloc (relocs, enclosing->reloc_count,
1809 rel = relocs + relindx;
1810 if (relindx < enclosing->reloc_count
1811 && rel->r_vaddr == (bfd_vma) sym.n_value
1812 && rel->r_size == 31
1813 && rel->r_type == R_POS)
1816 struct internal_syment relsym;
1818 erelsym = ((bfd_byte *) obj_coff_external_syms (abfd)
1819 + rel->r_symndx * symesz);
1820 bfd_coff_swap_sym_in (abfd, (PTR) erelsym, (PTR) &relsym);
1821 if (relsym.n_sclass == C_EXT)
1823 const char *relname;
1824 char relbuf[SYMNMLEN + 1];
1826 struct xcoff_link_hash_entry *h;
1828 /* At this point we know that the TOC entry is
1829 for an externally visible symbol. */
1830 relname = _bfd_coff_internal_syment_name (abfd, &relsym,
1832 if (relname == NULL)
1835 /* We only merge TOC entries if the TC name is
1836 the same as the symbol name. This handles
1837 the normal case, but not common cases like
1838 SYM.P4 which gcc generates to store SYM + 4
1839 in the TOC. FIXME. */
1840 if (strcmp (name, relname) == 0)
1842 copy = (! info->keep_memory
1843 || relsym._n._n_n._n_zeroes != 0
1844 || relsym._n._n_n._n_offset == 0);
1845 h = xcoff_link_hash_lookup (xcoff_hash_table (info),
1846 relname, true, copy,
1851 /* At this point h->root.type could be
1852 bfd_link_hash_new. That should be OK,
1853 since we know for sure that we will come
1854 across this symbol as we step through the
1857 /* We store h in *sym_hash for the
1858 convenience of the relocate_section
1862 if (h->toc_section != NULL)
1864 asection **rel_csects;
1866 /* We already have a TOC entry for this
1867 symbol, so we can just ignore this
1870 reloc_info[enclosing->target_index].csects;
1871 rel_csects[relindx] = bfd_und_section_ptr;
1875 /* We are about to create a TOC entry for
1883 /* We need to create a new section. We get the name from
1884 the csect storage mapping class, so that the linker can
1885 accumulate similar csects together. */
1887 static const char *csect_name_by_class[] =
1889 ".pr", ".ro", ".db", ".tc", ".ua", ".rw", ".gl", ".xo",
1890 ".sv", ".bs", ".ds", ".uc", ".ti", ".tb", NULL, ".tc0",
1893 const char *csect_name;
1894 asection *enclosing;
1896 if ((aux.x_csect.x_smclas >=
1897 sizeof csect_name_by_class / sizeof csect_name_by_class[0])
1898 || csect_name_by_class[aux.x_csect.x_smclas] == NULL)
1900 (*_bfd_error_handler)
1901 ("%s: symbol `%s' has unrecognized smclas %d",
1902 bfd_get_filename (abfd), name, aux.x_csect.x_smclas);
1903 bfd_set_error (bfd_error_bad_value);
1907 csect_name = csect_name_by_class[aux.x_csect.x_smclas];
1908 csect = bfd_make_section_anyway (abfd, csect_name);
1911 enclosing = coff_section_from_bfd_index (abfd, sym.n_scnum);
1912 if (enclosing == NULL)
1914 if (! bfd_is_abs_section (enclosing)
1915 && ((bfd_vma) sym.n_value < enclosing->vma
1916 || ((bfd_vma) sym.n_value + aux.x_csect.x_scnlen.l
1917 > enclosing->vma + enclosing->_raw_size)))
1919 (*_bfd_error_handler)
1920 ("%s: csect `%s' not in enclosing section",
1921 bfd_get_filename (abfd), name);
1922 bfd_set_error (bfd_error_bad_value);
1925 csect->vma = sym.n_value;
1926 csect->filepos = (enclosing->filepos
1929 csect->_raw_size = aux.x_csect.x_scnlen.l;
1930 csect->flags |= SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS;
1931 csect->alignment_power = SMTYP_ALIGN (aux.x_csect.x_smtyp);
1933 /* Record the enclosing section in the tdata for this new
1935 csect->used_by_bfd =
1936 ((struct coff_section_tdata *)
1937 bfd_zalloc (abfd, sizeof (struct coff_section_tdata)));
1938 if (csect->used_by_bfd == NULL)
1940 coff_section_data (abfd, csect)->tdata =
1941 bfd_zalloc (abfd, sizeof (struct xcoff_section_tdata));
1942 if (coff_section_data (abfd, csect)->tdata == NULL)
1944 xcoff_section_data (abfd, csect)->enclosing = enclosing;
1945 xcoff_section_data (abfd, csect)->lineno_count =
1946 enclosing->lineno_count;
1948 if (enclosing->owner == abfd)
1950 struct internal_reloc *relocs;
1951 bfd_size_type relindx;
1952 struct internal_reloc *rel;
1953 asection **rel_csect;
1955 relocs = reloc_info[enclosing->target_index].relocs;
1956 relindx = xcoff_find_reloc (relocs, enclosing->reloc_count,
1958 rel = relocs + relindx;
1959 rel_csect = (reloc_info[enclosing->target_index].csects
1961 csect->rel_filepos = (enclosing->rel_filepos
1962 + relindx * bfd_coff_relsz (abfd));
1963 while (relindx < enclosing->reloc_count
1964 && *rel_csect == NULL
1965 && rel->r_vaddr < csect->vma + csect->_raw_size)
1968 csect->flags |= SEC_RELOC;
1969 ++csect->reloc_count;
1976 /* There are a number of other fields and section flags
1977 which we do not bother to set. */
1979 csect_index = ((esym
1980 - (bfd_byte *) obj_coff_external_syms (abfd))
1983 xcoff_section_data (abfd, csect)->first_symndx = csect_index;
1985 if (first_csect == NULL)
1986 first_csect = csect;
1988 /* If this symbol is C_EXT, we treat it as starting at the
1989 beginning of the newly created section. */
1990 if (sym.n_sclass == C_EXT)
1996 /* If this is a TOC section for a symbol, record it. */
1997 if (set_toc != NULL)
1998 set_toc->toc_section = csect;
2003 /* This is a label definition. The x_scnlen field is the
2004 symbol index of the csect. I believe that this must
2005 always follow the appropriate XTY_SD symbol, so I will
2011 if (aux.x_csect.x_scnlen.l < 0
2012 || (aux.x_csect.x_scnlen.l
2013 >= esym - (bfd_byte *) obj_coff_external_syms (abfd)))
2017 section = xcoff_data (abfd)->csects[aux.x_csect.x_scnlen.l];
2019 || (section->flags & SEC_HAS_CONTENTS) == 0)
2024 (*_bfd_error_handler)
2025 ("%s: misplaced XTY_LD `%s'",
2026 bfd_get_filename (abfd), name);
2027 bfd_set_error (bfd_error_bad_value);
2031 value = sym.n_value - csect->vma;
2036 /* This is an unitialized csect. We could base the name on
2037 the storage mapping class, but we don't bother. If this
2038 csect is externally visible, it is a common symbol. */
2042 xcoff_section_data (abfd, csect)->last_symndx =
2044 - (bfd_byte *) obj_coff_external_syms (abfd))
2048 csect = bfd_make_section_anyway (abfd, ".bss");
2051 csect->vma = sym.n_value;
2052 csect->_raw_size = aux.x_csect.x_scnlen.l;
2053 csect->flags |= SEC_ALLOC;
2054 csect->alignment_power = SMTYP_ALIGN (aux.x_csect.x_smtyp);
2055 /* There are a number of other fields and section flags
2056 which we do not bother to set. */
2058 csect_index = ((esym
2059 - (bfd_byte *) obj_coff_external_syms (abfd))
2062 csect->used_by_bfd =
2063 ((struct coff_section_tdata *)
2064 bfd_zalloc (abfd, sizeof (struct coff_section_tdata)));
2065 if (csect->used_by_bfd == NULL)
2067 coff_section_data (abfd, csect)->tdata =
2068 bfd_zalloc (abfd, sizeof (struct xcoff_section_tdata));
2069 if (coff_section_data (abfd, csect)->tdata == NULL)
2071 xcoff_section_data (abfd, csect)->first_symndx = csect_index;
2073 if (first_csect == NULL)
2074 first_csect = csect;
2076 if (sym.n_sclass == C_EXT)
2078 csect->flags |= SEC_IS_COMMON;
2079 csect->_raw_size = 0;
2081 value = aux.x_csect.x_scnlen.l;
2087 /* Check for magic symbol names. */
2088 if ((smtyp == XTY_SD || smtyp == XTY_CM)
2089 && aux.x_csect.x_smclas != XMC_TC
2090 && aux.x_csect.x_smclas != XMC_TD)
2097 if (strcmp (name, "_text") == 0)
2099 else if (strcmp (name, "_etext") == 0)
2101 else if (strcmp (name, "_data") == 0)
2103 else if (strcmp (name, "_edata") == 0)
2105 else if (strcmp (name, "_end") == 0)
2108 else if (name[0] == 'e' && strcmp (name, "end") == 0)
2112 xcoff_hash_table (info)->special_sections[i] = csect;
2115 /* Now we have enough information to add the symbol to the
2116 linker hash table. */
2118 if (sym.n_sclass == C_EXT)
2122 BFD_ASSERT (section != NULL);
2124 /* We must copy the name into memory if we got it from the
2125 syment itself, rather than the string table. */
2126 copy = default_copy;
2127 if (sym._n._n_n._n_zeroes != 0
2128 || sym._n._n_n._n_offset == 0)
2131 if (info->hash->creator == abfd->xvec)
2133 /* If we are statically linking a shared object, it is
2134 OK for symbol redefinitions to occur. I can't figure
2135 out just what the XCOFF linker is doing, but
2136 something like this is required for -bnso to work. */
2137 if (! bfd_is_und_section (section))
2138 *sym_hash = xcoff_link_hash_lookup (xcoff_hash_table (info),
2139 name, true, copy, false);
2141 *sym_hash = ((struct xcoff_link_hash_entry *)
2142 bfd_wrapped_link_hash_lookup (abfd, info, name,
2143 true, copy, false));
2144 if (*sym_hash == NULL)
2146 if (((*sym_hash)->root.type == bfd_link_hash_defined
2147 || (*sym_hash)->root.type == bfd_link_hash_defweak)
2148 && ! bfd_is_und_section (section)
2149 && ! bfd_is_com_section (section))
2151 /* If the existing symbol is to global linkage code,
2152 and this symbol is not global linkage code, then
2153 replace the existing symbol. */
2154 if ((abfd->flags & DYNAMIC) != 0
2155 && ((*sym_hash)->smclas != XMC_GL
2156 || aux.x_csect.x_smclas == XMC_GL
2157 || ((*sym_hash)->root.u.def.section->owner->flags
2160 section = bfd_und_section_ptr;
2163 else if (((*sym_hash)->root.u.def.section->owner->flags
2166 (*sym_hash)->root.type = bfd_link_hash_undefined;
2167 (*sym_hash)->root.u.undef.abfd =
2168 (*sym_hash)->root.u.def.section->owner;
2173 /* _bfd_generic_link_add_one_symbol may call the linker to
2174 generate an error message, and the linker may try to read
2175 the symbol table to give a good error. Right now, the
2176 line numbers are in an inconsistent state, since they are
2177 counted both in the real sections and in the new csects.
2178 We need to leave the count in the real sections so that
2179 the linker can report the line number of the error
2180 correctly, so temporarily clobber the link to the csects
2181 so that the linker will not try to read the line numbers
2182 a second time from the csects. */
2183 BFD_ASSERT (last_real->next == first_csect);
2184 last_real->next = NULL;
2185 if (! (_bfd_generic_link_add_one_symbol
2186 (info, abfd, name, flags, section, value,
2187 (const char *) NULL, copy, true,
2188 (struct bfd_link_hash_entry **) sym_hash)))
2190 last_real->next = first_csect;
2192 if (smtyp == XTY_CM)
2194 if ((*sym_hash)->root.type != bfd_link_hash_common
2195 || (*sym_hash)->root.u.c.p->section != csect)
2197 /* We don't need the common csect we just created. */
2198 csect->_raw_size = 0;
2202 (*sym_hash)->root.u.c.p->alignment_power
2203 = csect->alignment_power;
2207 if (info->hash->creator == abfd->xvec)
2211 if (smtyp == XTY_ER || smtyp == XTY_CM)
2212 flag = XCOFF_REF_REGULAR;
2214 flag = XCOFF_DEF_REGULAR;
2215 (*sym_hash)->flags |= flag;
2217 if ((*sym_hash)->smclas == XMC_UA
2218 || flag == XCOFF_DEF_REGULAR)
2219 (*sym_hash)->smclas = aux.x_csect.x_smclas;
2223 *csect_cache = csect;
2225 esym += (sym.n_numaux + 1) * symesz;
2226 sym_hash += sym.n_numaux + 1;
2227 csect_cache += sym.n_numaux + 1;
2230 BFD_ASSERT (last_real == NULL || last_real->next == first_csect);
2232 /* Make sure that we have seen all the relocs. */
2233 for (o = abfd->sections; o != first_csect; o = o->next)
2235 /* Reset the section size and the line number count, since the
2236 data is now attached to the csects. Don't reset the size of
2237 the .debug section, since we need to read it below in
2238 bfd_xcoff_size_dynamic_sections. */
2239 if (strcmp (bfd_get_section_name (abfd, o), ".debug") != 0)
2241 o->lineno_count = 0;
2243 if ((o->flags & SEC_RELOC) != 0)
2246 struct internal_reloc *rel;
2247 asection **rel_csect;
2249 rel = reloc_info[o->target_index].relocs;
2250 rel_csect = reloc_info[o->target_index].csects;
2251 for (i = 0; i < o->reloc_count; i++, rel++, rel_csect++)
2253 if (*rel_csect == NULL)
2255 (*_bfd_error_handler)
2256 ("%s: reloc %s:%d not in csect",
2257 bfd_get_filename (abfd), o->name, i);
2258 bfd_set_error (bfd_error_bad_value);
2262 /* We identify all symbols which are called, so that we
2263 can create glue code for calls to functions imported
2264 from dynamic objects. */
2265 if (info->hash->creator == abfd->xvec
2266 && *rel_csect != bfd_und_section_ptr
2267 && (rel->r_type == R_BR
2268 || rel->r_type == R_RBR)
2269 && obj_xcoff_sym_hashes (abfd)[rel->r_symndx] != NULL)
2271 struct xcoff_link_hash_entry *h;
2273 h = obj_xcoff_sym_hashes (abfd)[rel->r_symndx];
2274 h->flags |= XCOFF_CALLED;
2275 /* If the symbol name starts with a period, it is
2276 the code of a function. If the symbol is
2277 currently undefined, then add an undefined symbol
2278 for the function descriptor. This should do no
2279 harm, because any regular object that defines the
2280 function should also define the function
2281 descriptor. It helps, because it means that we
2282 will identify the function descriptor with a
2283 dynamic object if a dynamic object defines it. */
2284 if (h->root.root.string[0] == '.'
2285 && h->descriptor == NULL)
2287 struct xcoff_link_hash_entry *hds;
2289 hds = xcoff_link_hash_lookup (xcoff_hash_table (info),
2290 h->root.root.string + 1,
2294 if (hds->root.type == bfd_link_hash_new)
2296 if (! (_bfd_generic_link_add_one_symbol
2297 (info, abfd, hds->root.root.string,
2298 (flagword) 0, bfd_und_section_ptr,
2299 (bfd_vma) 0, (const char *) NULL, false,
2301 (struct bfd_link_hash_entry **) &hds)))
2304 hds->flags |= XCOFF_DESCRIPTOR;
2305 BFD_ASSERT ((hds->flags & XCOFF_CALLED) == 0
2306 && (h->flags & XCOFF_DESCRIPTOR) == 0);
2307 hds->descriptor = h;
2308 h->descriptor = hds;
2313 free (reloc_info[o->target_index].csects);
2314 reloc_info[o->target_index].csects = NULL;
2316 /* Reset SEC_RELOC and the reloc_count, since the reloc
2317 information is now attached to the csects. */
2318 o->flags &=~ SEC_RELOC;
2321 /* If we are not keeping memory, free the reloc information. */
2322 if (! info->keep_memory
2323 && coff_section_data (abfd, o) != NULL
2324 && coff_section_data (abfd, o)->relocs != NULL
2325 && ! coff_section_data (abfd, o)->keep_relocs)
2327 free (coff_section_data (abfd, o)->relocs);
2328 coff_section_data (abfd, o)->relocs = NULL;
2332 /* Free up the line numbers. FIXME: We could cache these
2333 somewhere for the final link, to avoid reading them again. */
2334 if (reloc_info[o->target_index].linenos != NULL)
2336 free (reloc_info[o->target_index].linenos);
2337 reloc_info[o->target_index].linenos = NULL;
2343 obj_coff_keep_syms (abfd) = keep_syms;
2348 if (reloc_info != NULL)
2350 for (o = abfd->sections; o != NULL; o = o->next)
2352 if (reloc_info[o->target_index].csects != NULL)
2353 free (reloc_info[o->target_index].csects);
2354 if (reloc_info[o->target_index].linenos != NULL)
2355 free (reloc_info[o->target_index].linenos);
2359 obj_coff_keep_syms (abfd) = keep_syms;
2366 /* This function is used to add symbols from a dynamic object to the
2367 global symbol table. */
2370 xcoff_link_add_dynamic_symbols (abfd, info)
2372 struct bfd_link_info *info;
2376 struct internal_ldhdr ldhdr;
2377 const char *strings;
2378 struct external_ldsym *elsym, *elsymend;
2379 struct xcoff_import_file *n;
2384 struct xcoff_import_file **pp;
2386 /* We can only handle a dynamic object if we are generating an XCOFF
2388 if (info->hash->creator != abfd->xvec)
2390 (*_bfd_error_handler)
2391 ("%s: XCOFF shared object when not producing XCOFF output",
2392 bfd_get_filename (abfd));
2393 bfd_set_error (bfd_error_invalid_operation);
2397 /* The symbols we use from a dynamic object are not the symbols in
2398 the normal symbol table, but, rather, the symbols in the export
2399 table. If there is a global symbol in a dynamic object which is
2400 not in the export table, the loader will not be able to find it,
2401 so we don't want to find it either. Also, on AIX 4.1.3, shr.o in
2402 libc.a has symbols in the export table which are not in the
2405 /* Read in the .loader section. FIXME: We should really use the
2406 o_snloader field in the a.out header, rather than grabbing the
2408 lsec = bfd_get_section_by_name (abfd, ".loader");
2411 (*_bfd_error_handler)
2412 ("%s: dynamic object with no .loader section",
2413 bfd_get_filename (abfd));
2414 bfd_set_error (bfd_error_no_symbols);
2418 if (! xcoff_get_section_contents (abfd, lsec))
2420 buf = coff_section_data (abfd, lsec)->contents;
2422 /* Remove the sections from this object, so that they do not get
2423 included in the link. */
2424 abfd->sections = NULL;
2426 xcoff_swap_ldhdr_in (abfd, (struct external_ldhdr *) buf, &ldhdr);
2428 strings = (char *) buf + ldhdr.l_stoff;
2430 elsym = (struct external_ldsym *) (buf + LDHDRSZ);
2431 elsymend = elsym + ldhdr.l_nsyms;
2432 BFD_ASSERT (sizeof (struct external_ldsym) == LDSYMSZ);
2433 for (; elsym < elsymend; elsym++)
2435 struct internal_ldsym ldsym;
2436 char nambuf[SYMNMLEN + 1];
2438 struct xcoff_link_hash_entry *h;
2440 xcoff_swap_ldsym_in (abfd, elsym, &ldsym);
2442 /* We are only interested in exported symbols. */
2443 if ((ldsym.l_smtype & L_EXPORT) == 0)
2446 if (ldsym._l._l_l._l_zeroes == 0)
2447 name = strings + ldsym._l._l_l._l_offset;
2450 memcpy (nambuf, ldsym._l._l_name, SYMNMLEN);
2451 nambuf[SYMNMLEN] = '\0';
2455 /* Normally we could not call xcoff_link_hash_lookup in an add
2456 symbols routine, since we might not be using an XCOFF hash
2457 table. However, we verified above that we are using an XCOFF
2460 h = xcoff_link_hash_lookup (xcoff_hash_table (info), name, true,
2465 h->flags |= XCOFF_DEF_DYNAMIC;
2467 /* If the symbol is undefined, and the BFD it was found in is
2468 not a dynamic object, change the BFD to this dynamic object,
2469 so that we can get the correct import file ID. */
2470 if ((h->root.type == bfd_link_hash_undefined
2471 || h->root.type == bfd_link_hash_undefweak)
2472 && (h->root.u.undef.abfd == NULL
2473 || (h->root.u.undef.abfd->flags & DYNAMIC) == 0))
2474 h->root.u.undef.abfd = abfd;
2476 if (h->root.type == bfd_link_hash_new)
2478 h->root.type = bfd_link_hash_undefined;
2479 h->root.u.undef.abfd = abfd;
2480 /* We do not want to add this to the undefined symbol list. */
2483 if (h->smclas == XMC_UA
2484 || h->root.type == bfd_link_hash_undefined
2485 || h->root.type == bfd_link_hash_undefweak)
2486 h->smclas = ldsym.l_smclas;
2488 /* Unless this is an XMC_XO symbol, we don't bother to actually
2489 define it, since we don't have a section to put it in anyhow.
2490 Instead, the relocation routines handle the DEF_DYNAMIC flag
2493 if (h->smclas == XMC_XO
2494 && (h->root.type == bfd_link_hash_undefined
2495 || h->root.type == bfd_link_hash_undefweak))
2497 /* This symbol has an absolute value. */
2498 h->root.type = bfd_link_hash_defined;
2499 h->root.u.def.section = bfd_abs_section_ptr;
2500 h->root.u.def.value = ldsym.l_value;
2504 if (buf != NULL && ! coff_section_data (abfd, lsec)->keep_contents)
2506 free (coff_section_data (abfd, lsec)->contents);
2507 coff_section_data (abfd, lsec)->contents = NULL;
2510 /* Record this file in the import files. */
2512 n = ((struct xcoff_import_file *)
2513 bfd_alloc (abfd, sizeof (struct xcoff_import_file)));
2518 /* For some reason, the path entry in the import file list for a
2519 shared object appears to always be empty. The file name is the
2522 if (abfd->my_archive == NULL)
2524 bname = bfd_get_filename (abfd);
2529 bname = bfd_get_filename (abfd->my_archive);
2530 mname = bfd_get_filename (abfd);
2532 s = strrchr (bname, '/');
2538 /* We start c at 1 because the first import file number is reserved
2540 for (pp = &xcoff_hash_table (info)->imports, c = 1;
2542 pp = &(*pp)->next, ++c)
2546 xcoff_data (abfd)->import_file_id = c;
2551 /* Routines that are called after all the input files have been
2552 handled, but before the sections are laid out in memory. */
2554 /* Mark a symbol as not being garbage, including the section in which
2557 static INLINE boolean
2558 xcoff_mark_symbol (info, h)
2559 struct bfd_link_info *info;
2560 struct xcoff_link_hash_entry *h;
2562 if ((h->flags & XCOFF_MARK) != 0)
2565 h->flags |= XCOFF_MARK;
2566 if (h->root.type == bfd_link_hash_defined
2567 || h->root.type == bfd_link_hash_defweak)
2571 hsec = h->root.u.def.section;
2572 if ((hsec->flags & SEC_MARK) == 0)
2574 if (! xcoff_mark (info, hsec))
2579 if (h->toc_section != NULL
2580 && (h->toc_section->flags & SEC_MARK) == 0)
2582 if (! xcoff_mark (info, h->toc_section))
2589 /* The mark phase of garbage collection. For a given section, mark
2590 it, and all the sections which define symbols to which it refers.
2591 Because this function needs to look at the relocs, we also count
2592 the number of relocs which need to be copied into the .loader
2596 xcoff_mark (info, sec)
2597 struct bfd_link_info *info;
2600 if ((sec->flags & SEC_MARK) != 0)
2603 sec->flags |= SEC_MARK;
2605 if (sec->owner->xvec == info->hash->creator
2606 && coff_section_data (sec->owner, sec) != NULL
2607 && xcoff_section_data (sec->owner, sec) != NULL)
2609 register struct xcoff_link_hash_entry **hp, **hpend;
2610 struct internal_reloc *rel, *relend;
2612 /* Mark all the symbols in this section. */
2614 hp = (obj_xcoff_sym_hashes (sec->owner)
2615 + xcoff_section_data (sec->owner, sec)->first_symndx);
2616 hpend = (obj_xcoff_sym_hashes (sec->owner)
2617 + xcoff_section_data (sec->owner, sec)->last_symndx);
2618 for (; hp < hpend; hp++)
2620 register struct xcoff_link_hash_entry *h;
2624 && (h->flags & XCOFF_MARK) == 0)
2626 if (! xcoff_mark_symbol (info, h))
2631 /* Look through the section relocs. */
2633 if ((sec->flags & SEC_RELOC) != 0
2634 && sec->reloc_count > 0)
2636 rel = xcoff_read_internal_relocs (sec->owner, sec, true,
2637 (bfd_byte *) NULL, false,
2638 (struct internal_reloc *) NULL);
2641 relend = rel + sec->reloc_count;
2642 for (; rel < relend; rel++)
2645 struct xcoff_link_hash_entry *h;
2647 if ((unsigned int) rel->r_symndx
2648 > obj_raw_syment_count (sec->owner))
2651 h = obj_xcoff_sym_hashes (sec->owner)[rel->r_symndx];
2653 && (h->flags & XCOFF_MARK) == 0)
2655 if (! xcoff_mark_symbol (info, h))
2659 rsec = xcoff_data (sec->owner)->csects[rel->r_symndx];
2661 && (rsec->flags & SEC_MARK) == 0)
2663 if (! xcoff_mark (info, rsec))
2667 /* See if this reloc needs to be copied into the .loader
2669 switch (rel->r_type)
2673 || h->root.type == bfd_link_hash_defined
2674 || h->root.type == bfd_link_hash_defweak
2675 || h->root.type == bfd_link_hash_common
2676 || ((h->flags & XCOFF_CALLED) != 0
2677 && (h->root.type == bfd_link_hash_undefined
2678 || h->root.type == bfd_link_hash_undefweak)
2679 && h->root.root.string[0] == '.'
2680 && h->descriptor != NULL
2681 && ((h->descriptor->flags & XCOFF_DEF_DYNAMIC) != 0
2683 || ((h->descriptor->flags & XCOFF_IMPORT) != 0
2684 && (h->descriptor->flags
2685 & XCOFF_DEF_REGULAR) == 0))))
2692 ++xcoff_hash_table (info)->ldrel_count;
2694 h->flags |= XCOFF_LDREL;
2701 /* We should never need a .loader reloc for a TOC
2707 if (! info->keep_memory
2708 && coff_section_data (sec->owner, sec) != NULL
2709 && coff_section_data (sec->owner, sec)->relocs != NULL
2710 && ! coff_section_data (sec->owner, sec)->keep_relocs)
2712 free (coff_section_data (sec->owner, sec)->relocs);
2713 coff_section_data (sec->owner, sec)->relocs = NULL;
2721 /* The sweep phase of garbage collection. Remove all garbage
2726 struct bfd_link_info *info;
2730 for (sub = info->input_bfds; sub != NULL; sub = sub->link_next)
2734 for (o = sub->sections; o != NULL; o = o->next)
2736 if ((o->flags & SEC_MARK) == 0)
2738 /* Keep all sections from non-XCOFF input files. Keep
2739 special sections. Keep .debug sections for the
2741 if (sub->xvec != info->hash->creator
2742 || o == xcoff_hash_table (info)->debug_section
2743 || o == xcoff_hash_table (info)->loader_section
2744 || o == xcoff_hash_table (info)->linkage_section
2745 || o == xcoff_hash_table (info)->toc_section
2746 || o == xcoff_hash_table (info)->descriptor_section
2747 || strcmp (o->name, ".debug") == 0)
2748 o->flags |= SEC_MARK;
2753 o->lineno_count = 0;
2760 /* Record the number of elements in a set. This is used to output the
2761 correct csect length. */
2764 bfd_xcoff_link_record_set (output_bfd, info, harg, size)
2766 struct bfd_link_info *info;
2767 struct bfd_link_hash_entry *harg;
2770 struct xcoff_link_hash_entry *h = (struct xcoff_link_hash_entry *) harg;
2771 struct xcoff_link_size_list *n;
2773 if (! XCOFF_XVECP (output_bfd->xvec))
2776 /* This will hardly ever be called. I don't want to burn four bytes
2777 per global symbol, so instead the size is kept on a linked list
2778 attached to the hash table. */
2780 n = ((struct xcoff_link_size_list *)
2781 bfd_alloc (output_bfd, sizeof (struct xcoff_link_size_list)));
2784 n->next = xcoff_hash_table (info)->size_list;
2787 xcoff_hash_table (info)->size_list = n;
2789 h->flags |= XCOFF_HAS_SIZE;
2794 /* Import a symbol. */
2797 bfd_xcoff_import_symbol (output_bfd, info, harg, val, imppath, impfile,
2800 struct bfd_link_info *info;
2801 struct bfd_link_hash_entry *harg;
2803 const char *imppath;
2804 const char *impfile;
2805 const char *impmember;
2807 struct xcoff_link_hash_entry *h = (struct xcoff_link_hash_entry *) harg;
2809 if (! XCOFF_XVECP (output_bfd->xvec))
2812 h->flags |= XCOFF_IMPORT;
2814 if (val != (bfd_vma) -1)
2816 if (h->root.type == bfd_link_hash_defined
2817 && (! bfd_is_abs_section (h->root.u.def.section)
2818 || h->root.u.def.value != val))
2820 if (! ((*info->callbacks->multiple_definition)
2821 (info, h->root.root.string, h->root.u.def.section->owner,
2822 h->root.u.def.section, h->root.u.def.value,
2823 output_bfd, bfd_abs_section_ptr, val)))
2827 h->root.type = bfd_link_hash_defined;
2828 h->root.u.def.section = bfd_abs_section_ptr;
2829 h->root.u.def.value = val;
2832 if (h->ldsym == NULL)
2834 h->ldsym = ((struct internal_ldsym *)
2835 bfd_zalloc (output_bfd, sizeof (struct internal_ldsym)));
2836 if (h->ldsym == NULL)
2840 if (imppath == NULL)
2841 h->ldsym->l_ifile = (bfd_size_type) -1;
2845 struct xcoff_import_file **pp;
2847 /* We start c at 1 because the first entry in the import list is
2848 reserved for the library search path. */
2849 for (pp = &xcoff_hash_table (info)->imports, c = 1;
2851 pp = &(*pp)->next, ++c)
2853 if (strcmp ((*pp)->path, imppath) == 0
2854 && strcmp ((*pp)->file, impfile) == 0
2855 && strcmp ((*pp)->member, impmember) == 0)
2861 struct xcoff_import_file *n;
2863 n = ((struct xcoff_import_file *)
2864 bfd_alloc (output_bfd, sizeof (struct xcoff_import_file)));
2870 n->member = impmember;
2874 h->ldsym->l_ifile = c;
2880 /* Export a symbol. */
2883 bfd_xcoff_export_symbol (output_bfd, info, harg, syscall)
2885 struct bfd_link_info *info;
2886 struct bfd_link_hash_entry *harg;
2889 struct xcoff_link_hash_entry *h = (struct xcoff_link_hash_entry *) harg;
2891 if (! XCOFF_XVECP (output_bfd->xvec))
2894 h->flags |= XCOFF_EXPORT;
2896 /* FIXME: I'm not at all sure what syscall is supposed to mean, so
2897 I'm just going to ignore it until somebody explains it. */
2899 /* See if this is a function descriptor. It may be one even though
2900 it is not so marked. */
2901 if ((h->flags & XCOFF_DESCRIPTOR) == 0
2902 && h->root.root.string[0] != '.')
2905 struct xcoff_link_hash_entry *hfn;
2907 fnname = (char *) bfd_malloc (strlen (h->root.root.string) + 2);
2911 strcpy (fnname + 1, h->root.root.string);
2912 hfn = xcoff_link_hash_lookup (xcoff_hash_table (info),
2913 fnname, false, false, true);
2916 && hfn->smclas == XMC_PR
2917 && (hfn->root.type == bfd_link_hash_defined
2918 || hfn->root.type == bfd_link_hash_defweak))
2920 h->flags |= XCOFF_DESCRIPTOR;
2921 h->descriptor = hfn;
2922 hfn->descriptor = h;
2926 /* Make sure we don't garbage collect this symbol. */
2927 if (! xcoff_mark_symbol (info, h))
2930 /* If this is a function descriptor, make sure we don't garbage
2931 collect the associated function code. We normally don't have to
2932 worry about this, because the descriptor will be attached to a
2933 section with relocs, but if we are creating the descriptor
2934 ourselves those relocs will not be visible to the mark code. */
2935 if ((h->flags & XCOFF_DESCRIPTOR) != 0)
2937 if (! xcoff_mark_symbol (info, h->descriptor))
2944 /* Count a reloc against a symbol. This is called for relocs
2945 generated by the linker script, typically for global constructors
2949 bfd_xcoff_link_count_reloc (output_bfd, info, name)
2951 struct bfd_link_info *info;
2954 struct xcoff_link_hash_entry *h;
2956 if (! XCOFF_XVECP (output_bfd->xvec))
2959 h = ((struct xcoff_link_hash_entry *)
2960 bfd_wrapped_link_hash_lookup (output_bfd, info, name, false, false,
2964 (*_bfd_error_handler) ("%s: no such symbol", name);
2965 bfd_set_error (bfd_error_no_symbols);
2969 h->flags |= XCOFF_REF_REGULAR | XCOFF_LDREL;
2970 ++xcoff_hash_table (info)->ldrel_count;
2972 /* Mark the symbol to avoid garbage collection. */
2973 if (! xcoff_mark_symbol (info, h))
2979 /* This function is called for each symbol to which the linker script
2983 bfd_xcoff_record_link_assignment (output_bfd, info, name)
2985 struct bfd_link_info *info;
2988 struct xcoff_link_hash_entry *h;
2990 if (! XCOFF_XVECP (output_bfd->xvec))
2993 h = xcoff_link_hash_lookup (xcoff_hash_table (info), name, true, true,
2998 h->flags |= XCOFF_DEF_REGULAR;
3003 /* This structure is used to pass information through
3004 xcoff_link_hash_traverse. */
3006 struct xcoff_loader_info
3008 /* Set if a problem occurred. */
3012 /* Link information structure. */
3013 struct bfd_link_info *info;
3014 /* Whether all defined symbols should be exported. */
3015 boolean export_defineds;
3016 /* Number of ldsym structures. */
3018 /* Size of string table. */
3022 /* Allocated size of string table. */
3026 /* Build the .loader section. This is called by the XCOFF linker
3027 emulation before_allocation routine. We must set the size of the
3028 .loader section before the linker lays out the output file.
3029 LIBPATH is the library path to search for shared objects; this is
3030 normally built from the -L arguments passed to the linker. ENTRY
3031 is the name of the entry point symbol (the -e linker option).
3032 FILE_ALIGN is the alignment to use for sections within the file
3033 (the -H linker option). MAXSTACK is the maximum stack size (the
3034 -bmaxstack linker option). MAXDATA is the maximum data size (the
3035 -bmaxdata linker option). GC is whether to do garbage collection
3036 (the -bgc linker option). MODTYPE is the module type (the
3037 -bmodtype linker option). TEXTRO is whether the text section must
3038 be read only (the -btextro linker option). EXPORT_DEFINEDS is
3039 whether all defined symbols should be exported (the -unix linker
3040 option). SPECIAL_SECTIONS is set by this routine to csects with
3041 magic names like _end. */
3044 bfd_xcoff_size_dynamic_sections (output_bfd, info, libpath, entry,
3045 file_align, maxstack, maxdata, gc,
3046 modtype, textro, export_defineds,
3049 struct bfd_link_info *info;
3050 const char *libpath;
3052 unsigned long file_align;
3053 unsigned long maxstack;
3054 unsigned long maxdata;
3058 boolean export_defineds;
3059 asection **special_sections;
3061 struct xcoff_link_hash_entry *hentry;
3063 struct xcoff_loader_info ldinfo;
3065 size_t impsize, impcount;
3066 struct xcoff_import_file *fl;
3067 struct internal_ldhdr *ldhdr;
3068 bfd_size_type stoff;
3072 struct bfd_strtab_hash *debug_strtab;
3073 bfd_byte *debug_contents = NULL;
3075 if (! XCOFF_XVECP (output_bfd->xvec))
3077 for (i = 0; i < 6; i++)
3078 special_sections[i] = NULL;
3082 ldinfo.failed = false;
3083 ldinfo.output_bfd = output_bfd;
3085 ldinfo.export_defineds = export_defineds;
3086 ldinfo.ldsym_count = 0;
3087 ldinfo.string_size = 0;
3088 ldinfo.strings = NULL;
3089 ldinfo.string_alc = 0;
3091 xcoff_data (output_bfd)->maxstack = maxstack;
3092 xcoff_data (output_bfd)->maxdata = maxdata;
3093 xcoff_data (output_bfd)->modtype = modtype;
3095 xcoff_hash_table (info)->file_align = file_align;
3096 xcoff_hash_table (info)->textro = textro;
3098 hentry = xcoff_link_hash_lookup (xcoff_hash_table (info), entry,
3099 false, false, true);
3101 hentry->flags |= XCOFF_ENTRY;
3103 /* Garbage collect unused sections. */
3104 if (info->relocateable
3107 || (hentry->root.type != bfd_link_hash_defined
3108 && hentry->root.type != bfd_link_hash_defweak))
3111 xcoff_hash_table (info)->gc = false;
3113 /* We still need to call xcoff_mark, in order to set ldrel_count
3115 for (sub = info->input_bfds; sub != NULL; sub = sub->link_next)
3119 for (o = sub->sections; o != NULL; o = o->next)
3121 if ((o->flags & SEC_MARK) == 0)
3123 if (! xcoff_mark (info, o))
3131 if (! xcoff_mark (info, hentry->root.u.def.section))
3134 xcoff_hash_table (info)->gc = true;
3137 /* Return special sections to the caller. */
3138 for (i = 0; i < 6; i++)
3142 sec = xcoff_hash_table (info)->special_sections[i];
3145 && (sec->flags & SEC_MARK) == 0)
3147 special_sections[i] = sec;
3150 if (info->input_bfds == NULL)
3152 /* I'm not sure what to do in this bizarre case. */
3156 xcoff_link_hash_traverse (xcoff_hash_table (info), xcoff_build_ldsyms,
3161 /* Work out the size of the import file names. Each import file ID
3162 consists of three null terminated strings: the path, the file
3163 name, and the archive member name. The first entry in the list
3164 of names is the path to use to find objects, which the linker has
3165 passed in as the libpath argument. For some reason, the path
3166 entry in the other import file names appears to always be empty. */
3167 impsize = strlen (libpath) + 3;
3169 for (fl = xcoff_hash_table (info)->imports; fl != NULL; fl = fl->next)
3172 impsize += (strlen (fl->path)
3174 + strlen (fl->member)
3178 /* Set up the .loader section header. */
3179 ldhdr = &xcoff_hash_table (info)->ldhdr;
3180 ldhdr->l_version = 1;
3181 ldhdr->l_nsyms = ldinfo.ldsym_count;
3182 ldhdr->l_nreloc = xcoff_hash_table (info)->ldrel_count;
3183 ldhdr->l_istlen = impsize;
3184 ldhdr->l_nimpid = impcount;
3185 ldhdr->l_impoff = (LDHDRSZ
3186 + ldhdr->l_nsyms * LDSYMSZ
3187 + ldhdr->l_nreloc * LDRELSZ);
3188 ldhdr->l_stlen = ldinfo.string_size;
3189 stoff = ldhdr->l_impoff + impsize;
3190 if (ldinfo.string_size == 0)
3193 ldhdr->l_stoff = stoff;
3195 /* We now know the final size of the .loader section. Allocate
3197 lsec = xcoff_hash_table (info)->loader_section;
3198 lsec->_raw_size = stoff + ldhdr->l_stlen;
3199 lsec->contents = (bfd_byte *) bfd_zalloc (output_bfd, lsec->_raw_size);
3200 if (lsec->contents == NULL)
3203 /* Set up the header. */
3204 xcoff_swap_ldhdr_out (output_bfd, ldhdr,
3205 (struct external_ldhdr *) lsec->contents);
3207 /* Set up the import file names. */
3208 out = (char *) lsec->contents + ldhdr->l_impoff;
3209 strcpy (out, libpath);
3210 out += strlen (libpath) + 1;
3213 for (fl = xcoff_hash_table (info)->imports; fl != NULL; fl = fl->next)
3215 register const char *s;
3218 while ((*out++ = *s++) != '\0')
3221 while ((*out++ = *s++) != '\0')
3224 while ((*out++ = *s++) != '\0')
3228 BFD_ASSERT ((bfd_size_type) ((bfd_byte *) out - lsec->contents) == stoff);
3230 /* Set up the symbol string table. */
3231 if (ldinfo.string_size > 0)
3233 memcpy (out, ldinfo.strings, ldinfo.string_size);
3234 free (ldinfo.strings);
3235 ldinfo.strings = NULL;
3238 /* We can't set up the symbol table or the relocs yet, because we
3239 don't yet know the final position of the various sections. The
3240 .loader symbols are written out when the corresponding normal
3241 symbols are written out in xcoff_link_input_bfd or
3242 xcoff_write_global_symbol. The .loader relocs are written out
3243 when the corresponding normal relocs are handled in
3244 xcoff_link_input_bfd. */
3246 /* Allocate space for the magic sections. */
3247 sec = xcoff_hash_table (info)->linkage_section;
3248 if (sec->_raw_size > 0)
3250 sec->contents = (bfd_byte *) bfd_zalloc (output_bfd, sec->_raw_size);
3251 if (sec->contents == NULL)
3254 sec = xcoff_hash_table (info)->toc_section;
3255 if (sec->_raw_size > 0)
3257 sec->contents = (bfd_byte *) bfd_zalloc (output_bfd, sec->_raw_size);
3258 if (sec->contents == NULL)
3261 sec = xcoff_hash_table (info)->descriptor_section;
3262 if (sec->_raw_size > 0)
3264 sec->contents = (bfd_byte *) bfd_zalloc (output_bfd, sec->_raw_size);
3265 if (sec->contents == NULL)
3269 /* Now that we've done garbage collection, figure out the contents
3270 of the .debug section. */
3271 debug_strtab = xcoff_hash_table (info)->debug_strtab;
3273 for (sub = info->input_bfds; sub != NULL; sub = sub->link_next)
3276 bfd_size_type symcount;
3277 unsigned long *debug_index;
3279 bfd_byte *esym, *esymend;
3280 bfd_size_type symesz;
3282 if (sub->xvec != info->hash->creator)
3284 subdeb = bfd_get_section_by_name (sub, ".debug");
3285 if (subdeb == NULL || subdeb->_raw_size == 0)
3288 if (info->strip == strip_all
3289 || info->strip == strip_debugger
3290 || info->discard == discard_all)
3292 subdeb->_raw_size = 0;
3296 if (! _bfd_coff_get_external_symbols (sub))
3299 symcount = obj_raw_syment_count (sub);
3300 debug_index = ((unsigned long *)
3301 bfd_zalloc (sub, symcount * sizeof (unsigned long)));
3302 if (debug_index == NULL)
3304 xcoff_data (sub)->debug_indices = debug_index;
3306 /* Grab the contents of the .debug section. We use malloc and
3307 copy the neams into the debug stringtab, rather than
3308 bfd_alloc, because I expect that, when linking many files
3309 together, many of the strings will be the same. Storing the
3310 strings in the hash table should save space in this case. */
3311 debug_contents = (bfd_byte *) bfd_malloc (subdeb->_raw_size);
3312 if (debug_contents == NULL)
3314 if (! bfd_get_section_contents (sub, subdeb, (PTR) debug_contents,
3315 (file_ptr) 0, subdeb->_raw_size))
3318 csectpp = xcoff_data (sub)->csects;
3320 symesz = bfd_coff_symesz (sub);
3321 esym = (bfd_byte *) obj_coff_external_syms (sub);
3322 esymend = esym + symcount * symesz;
3323 while (esym < esymend)
3325 struct internal_syment sym;
3327 bfd_coff_swap_sym_in (sub, (PTR) esym, (PTR) &sym);
3329 *debug_index = (unsigned long) -1;
3331 if (sym._n._n_n._n_zeroes == 0
3334 || ((*csectpp)->flags & SEC_MARK) != 0
3335 || *csectpp == bfd_abs_section_ptr)
3336 && bfd_coff_symname_in_debug (sub, &sym))
3341 name = (char *) debug_contents + sym._n._n_n._n_offset;
3342 indx = _bfd_stringtab_add (debug_strtab, name, true, true);
3343 if (indx == (bfd_size_type) -1)
3345 *debug_index = indx;
3348 esym += (sym.n_numaux + 1) * symesz;
3349 csectpp += sym.n_numaux + 1;
3350 debug_index += sym.n_numaux + 1;
3353 free (debug_contents);
3354 debug_contents = NULL;
3356 /* Clear the size of subdeb, so that it is not included directly
3357 in the output file. */
3358 subdeb->_raw_size = 0;
3360 if (! info->keep_memory)
3362 if (! _bfd_coff_free_symbols (sub))
3367 xcoff_hash_table (info)->debug_section->_raw_size =
3368 _bfd_stringtab_size (debug_strtab);
3373 if (ldinfo.strings != NULL)
3374 free (ldinfo.strings);
3375 if (debug_contents != NULL)
3376 free (debug_contents);
3380 /* Add a symbol to the .loader symbols, if necessary. */
3383 xcoff_build_ldsyms (h, p)
3384 struct xcoff_link_hash_entry *h;
3387 struct xcoff_loader_info *ldinfo = (struct xcoff_loader_info *) p;
3390 /* If this is a final link, and the symbol was defined as a common
3391 symbol in a regular object file, and there was no definition in
3392 any dynamic object, then the linker will have allocated space for
3393 the symbol in a common section but the XCOFF_DEF_REGULAR flag
3394 will not have been set. */
3395 if (h->root.type == bfd_link_hash_defined
3396 && (h->flags & XCOFF_DEF_REGULAR) == 0
3397 && (h->flags & XCOFF_REF_REGULAR) != 0
3398 && (h->flags & XCOFF_DEF_DYNAMIC) == 0
3399 && (h->root.u.def.section->owner->flags & DYNAMIC) == 0)
3400 h->flags |= XCOFF_DEF_REGULAR;
3402 /* If all defined symbols should be exported, mark them now. We
3403 don't want to export the actual functions, just the function
3405 if (ldinfo->export_defineds
3406 && (h->flags & XCOFF_DEF_REGULAR) != 0
3407 && h->root.root.string[0] != '.')
3408 h->flags |= XCOFF_EXPORT;
3410 /* We don't want to garbage collect symbols which are not defined in
3411 XCOFF files. This is a convenient place to mark them. */
3412 if (xcoff_hash_table (ldinfo->info)->gc
3413 && (h->flags & XCOFF_MARK) == 0
3414 && (h->root.type == bfd_link_hash_defined
3415 || h->root.type == bfd_link_hash_defweak)
3416 && (h->root.u.def.section->owner == NULL
3417 || (h->root.u.def.section->owner->xvec
3418 != ldinfo->info->hash->creator)))
3419 h->flags |= XCOFF_MARK;
3421 /* If this symbol is called and defined in a dynamic object, or not
3422 defined at all when building a shared object, or imported, then
3423 we need to set up global linkage code for it. (Unless we did
3424 garbage collection and we didn't need this symbol.) */
3425 if ((h->flags & XCOFF_CALLED) != 0
3426 && (h->root.type == bfd_link_hash_undefined
3427 || h->root.type == bfd_link_hash_undefweak)
3428 && h->root.root.string[0] == '.'
3429 && h->descriptor != NULL
3430 && ((h->descriptor->flags & XCOFF_DEF_DYNAMIC) != 0
3431 || ldinfo->info->shared
3432 || ((h->descriptor->flags & XCOFF_IMPORT) != 0
3433 && (h->descriptor->flags & XCOFF_DEF_REGULAR) == 0))
3434 && (! xcoff_hash_table (ldinfo->info)->gc
3435 || (h->flags & XCOFF_MARK) != 0))
3438 struct xcoff_link_hash_entry *hds;
3440 sec = xcoff_hash_table (ldinfo->info)->linkage_section;
3441 h->root.type = bfd_link_hash_defined;
3442 h->root.u.def.section = sec;
3443 h->root.u.def.value = sec->_raw_size;
3445 h->flags |= XCOFF_DEF_REGULAR;
3446 sec->_raw_size += XCOFF_GLINK_SIZE;
3448 /* The global linkage code requires a TOC entry for the
3450 hds = h->descriptor;
3451 BFD_ASSERT ((hds->root.type == bfd_link_hash_undefined
3452 || hds->root.type == bfd_link_hash_undefweak)
3453 && (hds->flags & XCOFF_DEF_REGULAR) == 0);
3454 hds->flags |= XCOFF_MARK;
3455 if (hds->toc_section == NULL)
3457 hds->toc_section = xcoff_hash_table (ldinfo->info)->toc_section;
3458 hds->u.toc_offset = hds->toc_section->_raw_size;
3459 hds->toc_section->_raw_size += 4;
3460 ++xcoff_hash_table (ldinfo->info)->ldrel_count;
3461 ++hds->toc_section->reloc_count;
3463 hds->flags |= XCOFF_SET_TOC | XCOFF_LDREL;
3465 /* We need to call xcoff_build_ldsyms recursively here,
3466 because we may already have passed hds on the traversal. */
3467 xcoff_build_ldsyms (hds, p);
3471 /* If this symbol is exported, but not defined, we need to try to
3473 if ((h->flags & XCOFF_EXPORT) != 0
3474 && (h->flags & XCOFF_IMPORT) == 0
3475 && (h->flags & XCOFF_DEF_REGULAR) == 0
3476 && (h->flags & XCOFF_DEF_DYNAMIC) == 0
3477 && (h->root.type == bfd_link_hash_undefined
3478 || h->root.type == bfd_link_hash_undefweak))
3480 if ((h->flags & XCOFF_DESCRIPTOR) != 0
3481 && (h->descriptor->root.type == bfd_link_hash_defined
3482 || h->descriptor->root.type == bfd_link_hash_defweak))
3486 /* This is an undefined function descriptor associated with
3487 a defined entry point. We can build up a function
3488 descriptor ourselves. Believe it or not, the AIX linker
3489 actually does this, and there are cases where we need to
3491 sec = xcoff_hash_table (ldinfo->info)->descriptor_section;
3492 h->root.type = bfd_link_hash_defined;
3493 h->root.u.def.section = sec;
3494 h->root.u.def.value = sec->_raw_size;
3496 h->flags |= XCOFF_DEF_REGULAR;
3497 sec->_raw_size += 12;
3499 /* A function descriptor uses two relocs: one for the
3500 associated code, and one for the TOC address. */
3501 xcoff_hash_table (ldinfo->info)->ldrel_count += 2;
3502 sec->reloc_count += 2;
3504 /* We handle writing out the contents of the descriptor in
3505 xcoff_write_global_symbol. */
3509 (*_bfd_error_handler)
3510 ("warning: attempt to export undefined symbol `%s'",
3511 h->root.root.string);
3517 /* If this is still a common symbol, and it wasn't garbage
3518 collected, we need to actually allocate space for it in the .bss
3520 if (h->root.type == bfd_link_hash_common
3521 && (! xcoff_hash_table (ldinfo->info)->gc
3522 || (h->flags & XCOFF_MARK) != 0)
3523 && h->root.u.c.p->section->_raw_size == 0)
3525 BFD_ASSERT (bfd_is_com_section (h->root.u.c.p->section));
3526 h->root.u.c.p->section->_raw_size = h->root.u.c.size;
3529 /* We need to add a symbol to the .loader section if it is mentioned
3530 in a reloc which we are copying to the .loader section and it was
3531 not defined or common, or if it is the entry point, or if it is
3534 if (((h->flags & XCOFF_LDREL) == 0
3535 || h->root.type == bfd_link_hash_defined
3536 || h->root.type == bfd_link_hash_defweak
3537 || h->root.type == bfd_link_hash_common)
3538 && (h->flags & XCOFF_ENTRY) == 0
3539 && (h->flags & XCOFF_EXPORT) == 0)
3545 /* We don't need to add this symbol if we did garbage collection and
3546 we did not mark this symbol. */
3547 if (xcoff_hash_table (ldinfo->info)->gc
3548 && (h->flags & XCOFF_MARK) == 0)
3554 /* We may have already processed this symbol due to the recursive
3556 if ((h->flags & XCOFF_BUILT_LDSYM) != 0)
3559 /* We need to add this symbol to the .loader symbols. */
3561 /* h->ldsym will already have been allocated for an explicitly
3563 if (h->ldsym == NULL)
3565 h->ldsym = ((struct internal_ldsym *)
3566 bfd_zalloc (ldinfo->output_bfd,
3567 sizeof (struct internal_ldsym)));
3568 if (h->ldsym == NULL)
3570 ldinfo->failed = true;
3575 /* The first 3 symbol table indices are reserved to indicate the
3577 h->ldindx = ldinfo->ldsym_count + 3;
3579 ++ldinfo->ldsym_count;
3581 len = strlen (h->root.root.string);
3582 if (len <= SYMNMLEN)
3583 strncpy (h->ldsym->_l._l_name, h->root.root.string, SYMNMLEN);
3586 if (ldinfo->string_size + len + 3 > ldinfo->string_alc)
3589 bfd_byte *newstrings;
3591 newalc = ldinfo->string_alc * 2;
3594 while (ldinfo->string_size + len + 3 > newalc)
3597 newstrings = ((bfd_byte *)
3598 bfd_realloc ((PTR) ldinfo->strings, newalc));
3599 if (newstrings == NULL)
3601 ldinfo->failed = true;
3604 ldinfo->string_alc = newalc;
3605 ldinfo->strings = newstrings;
3608 bfd_put_16 (ldinfo->output_bfd, len + 1,
3609 ldinfo->strings + ldinfo->string_size);
3610 strcpy (ldinfo->strings + ldinfo->string_size + 2, h->root.root.string);
3611 h->ldsym->_l._l_l._l_zeroes = 0;
3612 h->ldsym->_l._l_l._l_offset = ldinfo->string_size + 2;
3613 ldinfo->string_size += len + 3;
3616 h->flags |= XCOFF_BUILT_LDSYM;
3621 /* Do the final link step. */
3624 _bfd_xcoff_bfd_final_link (abfd, info)
3626 struct bfd_link_info *info;
3628 bfd_size_type symesz;
3629 struct xcoff_final_link_info finfo;
3631 struct bfd_link_order *p;
3632 size_t max_contents_size;
3633 size_t max_sym_count;
3634 size_t max_lineno_count;
3635 size_t max_reloc_count;
3636 size_t max_output_reloc_count;
3637 file_ptr rel_filepos;
3639 file_ptr line_filepos;
3640 unsigned int linesz;
3642 bfd_byte *external_relocs = NULL;
3643 char strbuf[STRING_SIZE_SIZE];
3646 abfd->flags |= DYNAMIC;
3648 symesz = bfd_coff_symesz (abfd);
3651 finfo.output_bfd = abfd;
3652 finfo.strtab = NULL;
3653 finfo.section_info = NULL;
3654 finfo.last_file_index = -1;
3655 finfo.toc_symindx = -1;
3656 finfo.internal_syms = NULL;
3657 finfo.sym_indices = NULL;
3658 finfo.outsyms = NULL;
3659 finfo.linenos = NULL;
3660 finfo.contents = NULL;
3661 finfo.external_relocs = NULL;
3663 finfo.ldsym = ((struct external_ldsym *)
3664 (xcoff_hash_table (info)->loader_section->contents
3666 finfo.ldrel = ((struct external_ldrel *)
3667 (xcoff_hash_table (info)->loader_section->contents
3669 + xcoff_hash_table (info)->ldhdr.l_nsyms * LDSYMSZ));
3671 xcoff_data (abfd)->coff.link_info = info;
3673 finfo.strtab = _bfd_stringtab_init ();
3674 if (finfo.strtab == NULL)
3677 /* Count the line number and relocation entries required for the
3678 output file. Determine a few maximum sizes. */
3679 max_contents_size = 0;
3680 max_lineno_count = 0;
3681 max_reloc_count = 0;
3682 for (o = abfd->sections; o != NULL; o = o->next)
3685 o->lineno_count = 0;
3686 for (p = o->link_order_head; p != NULL; p = p->next)
3688 if (p->type == bfd_indirect_link_order)
3692 sec = p->u.indirect.section;
3694 /* Mark all sections which are to be included in the
3695 link. This will normally be every section. We need
3696 to do this so that we can identify any sections which
3697 the linker has decided to not include. */
3698 sec->linker_mark = true;
3700 if (info->strip == strip_none
3701 || info->strip == strip_some)
3702 o->lineno_count += sec->lineno_count;
3704 o->reloc_count += sec->reloc_count;
3706 if (sec->_raw_size > max_contents_size)
3707 max_contents_size = sec->_raw_size;
3708 if (sec->lineno_count > max_lineno_count)
3709 max_lineno_count = sec->lineno_count;
3710 if (coff_section_data (sec->owner, sec) != NULL
3711 && xcoff_section_data (sec->owner, sec) != NULL
3712 && (xcoff_section_data (sec->owner, sec)->lineno_count
3713 > max_lineno_count))
3715 xcoff_section_data (sec->owner, sec)->lineno_count;
3716 if (sec->reloc_count > max_reloc_count)
3717 max_reloc_count = sec->reloc_count;
3719 else if (p->type == bfd_section_reloc_link_order
3720 || p->type == bfd_symbol_reloc_link_order)
3725 /* Compute the file positions for all the sections. */
3726 if (abfd->output_has_begun)
3728 if (xcoff_hash_table (info)->file_align != 0)
3735 file_align = xcoff_hash_table (info)->file_align;
3736 if (file_align != 0)
3738 boolean saw_contents;
3743 /* Insert .pad sections before every section which has
3744 contents and is loaded, if it is preceded by some other
3745 section which has contents and is loaded. */
3746 saw_contents = true;
3747 for (op = &abfd->sections; *op != NULL; op = &(*op)->next)
3749 (*op)->target_index = indx;
3750 if (strcmp ((*op)->name, ".pad") == 0)
3751 saw_contents = false;
3752 else if (((*op)->flags & SEC_HAS_CONTENTS) != 0
3753 && ((*op)->flags & SEC_LOAD) != 0)
3756 saw_contents = true;
3763 n = bfd_make_section_anyway (abfd, ".pad");
3764 BFD_ASSERT (*op == n);
3766 n->flags = SEC_HAS_CONTENTS;
3767 n->alignment_power = 0;
3768 saw_contents = false;
3773 /* Reset the section indices after inserting the new
3776 for (o = abfd->sections; o != NULL; o = o->next)
3779 o->target_index = indx;
3781 BFD_ASSERT ((unsigned int) indx == abfd->section_count);
3783 /* Work out appropriate sizes for the .pad sections to force
3784 each section to land on a page boundary. This bit of
3785 code knows what compute_section_file_positions is going
3787 sofar = bfd_coff_filhsz (abfd);
3788 sofar += bfd_coff_aoutsz (abfd);
3789 sofar += abfd->section_count * bfd_coff_scnhsz (abfd);
3790 for (o = abfd->sections; o != NULL; o = o->next)
3791 if (o->reloc_count >= 0xffff || o->lineno_count >= 0xffff)
3792 sofar += bfd_coff_scnhsz (abfd);
3794 for (o = abfd->sections; o != NULL; o = o->next)
3796 if (strcmp (o->name, ".pad") == 0)
3800 BFD_ASSERT (o->_raw_size == 0);
3801 pageoff = sofar & (file_align - 1);
3804 o->_raw_size = file_align - pageoff;
3805 sofar += file_align - pageoff;
3806 o->flags |= SEC_HAS_CONTENTS;
3811 if ((o->flags & SEC_HAS_CONTENTS) != 0)
3812 sofar += BFD_ALIGN (o->_raw_size,
3813 1 << o->alignment_power);
3818 bfd_coff_compute_section_file_positions (abfd);
3821 /* Allocate space for the pointers we need to keep for the relocs. */
3825 /* We use section_count + 1, rather than section_count, because
3826 the target_index fields are 1 based. */
3827 finfo.section_info =
3828 ((struct xcoff_link_section_info *)
3829 bfd_malloc ((abfd->section_count + 1)
3830 * sizeof (struct xcoff_link_section_info)));
3831 if (finfo.section_info == NULL)
3833 for (i = 0; i <= abfd->section_count; i++)
3835 finfo.section_info[i].relocs = NULL;
3836 finfo.section_info[i].rel_hashes = NULL;
3837 finfo.section_info[i].toc_rel_hashes = NULL;
3841 /* Set the file positions for the relocs. */
3842 rel_filepos = obj_relocbase (abfd);
3843 relsz = bfd_coff_relsz (abfd);
3844 max_output_reloc_count = 0;
3845 for (o = abfd->sections; o != NULL; o = o->next)
3847 if (o->reloc_count == 0)
3851 o->flags |= SEC_RELOC;
3852 o->rel_filepos = rel_filepos;
3853 rel_filepos += o->reloc_count * relsz;
3855 /* We don't know the indices of global symbols until we have
3856 written out all the local symbols. For each section in
3857 the output file, we keep an array of pointers to hash
3858 table entries. Each entry in the array corresponds to a
3859 reloc. When we find a reloc against a global symbol, we
3860 set the corresponding entry in this array so that we can
3861 fix up the symbol index after we have written out all the
3864 Because of this problem, we also keep the relocs in
3865 memory until the end of the link. This wastes memory.
3866 We could backpatch the file later, I suppose, although it
3868 finfo.section_info[o->target_index].relocs =
3869 ((struct internal_reloc *)
3870 bfd_malloc (o->reloc_count * sizeof (struct internal_reloc)));
3871 finfo.section_info[o->target_index].rel_hashes =
3872 ((struct xcoff_link_hash_entry **)
3873 bfd_malloc (o->reloc_count
3874 * sizeof (struct xcoff_link_hash_entry *)));
3875 if (finfo.section_info[o->target_index].relocs == NULL
3876 || finfo.section_info[o->target_index].rel_hashes == NULL)
3879 if (o->reloc_count > max_output_reloc_count)
3880 max_output_reloc_count = o->reloc_count;
3884 /* We now know the size of the relocs, so we can determine the file
3885 positions of the line numbers. */
3886 line_filepos = rel_filepos;
3887 finfo.line_filepos = line_filepos;
3888 linesz = bfd_coff_linesz (abfd);
3889 for (o = abfd->sections; o != NULL; o = o->next)
3891 if (o->lineno_count == 0)
3892 o->line_filepos = 0;
3895 o->line_filepos = line_filepos;
3896 line_filepos += o->lineno_count * linesz;
3899 /* Reset the reloc and lineno counts, so that we can use them to
3900 count the number of entries we have output so far. */
3902 o->lineno_count = 0;
3905 obj_sym_filepos (abfd) = line_filepos;
3907 /* Figure out the largest number of symbols in an input BFD. Take
3908 the opportunity to clear the output_has_begun fields of all the
3909 input BFD's. We want at least 4 symbols, since that is the
3910 number which xcoff_write_global_symbol may need. */
3912 for (sub = info->input_bfds; sub != NULL; sub = sub->link_next)
3916 sub->output_has_begun = false;
3917 sz = obj_raw_syment_count (sub);
3918 if (sz > max_sym_count)
3922 /* Allocate some buffers used while linking. */
3923 finfo.internal_syms = ((struct internal_syment *)
3924 bfd_malloc (max_sym_count
3925 * sizeof (struct internal_syment)));
3926 finfo.sym_indices = (long *) bfd_malloc (max_sym_count * sizeof (long));
3927 finfo.outsyms = ((bfd_byte *)
3928 bfd_malloc ((size_t) ((max_sym_count + 1) * symesz)));
3929 finfo.linenos = (bfd_byte *) bfd_malloc (max_lineno_count
3930 * bfd_coff_linesz (abfd));
3931 finfo.contents = (bfd_byte *) bfd_malloc (max_contents_size);
3932 finfo.external_relocs = (bfd_byte *) bfd_malloc (max_reloc_count * relsz);
3933 if ((finfo.internal_syms == NULL && max_sym_count > 0)
3934 || (finfo.sym_indices == NULL && max_sym_count > 0)
3935 || finfo.outsyms == NULL
3936 || (finfo.linenos == NULL && max_lineno_count > 0)
3937 || (finfo.contents == NULL && max_contents_size > 0)
3938 || (finfo.external_relocs == NULL && max_reloc_count > 0))
3941 obj_raw_syment_count (abfd) = 0;
3942 xcoff_data (abfd)->toc = (bfd_vma) -1;
3944 /* We now know the position of everything in the file, except that
3945 we don't know the size of the symbol table and therefore we don't
3946 know where the string table starts. We just build the string
3947 table in memory as we go along. We process all the relocations
3948 for a single input file at once. */
3949 for (o = abfd->sections; o != NULL; o = o->next)
3951 for (p = o->link_order_head; p != NULL; p = p->next)
3953 if (p->type == bfd_indirect_link_order
3954 && p->u.indirect.section->owner->xvec == abfd->xvec)
3956 sub = p->u.indirect.section->owner;
3957 if (! sub->output_has_begun)
3959 if (! xcoff_link_input_bfd (&finfo, sub))
3961 sub->output_has_begun = true;
3964 else if (p->type == bfd_section_reloc_link_order
3965 || p->type == bfd_symbol_reloc_link_order)
3967 if (! xcoff_reloc_link_order (abfd, &finfo, o, p))
3972 if (! _bfd_default_link_order (abfd, info, o, p))
3978 /* Free up the buffers used by xcoff_link_input_bfd. */
3980 if (finfo.internal_syms != NULL)
3982 free (finfo.internal_syms);
3983 finfo.internal_syms = NULL;
3985 if (finfo.sym_indices != NULL)
3987 free (finfo.sym_indices);
3988 finfo.sym_indices = NULL;
3990 if (finfo.linenos != NULL)
3992 free (finfo.linenos);
3993 finfo.linenos = NULL;
3995 if (finfo.contents != NULL)
3997 free (finfo.contents);
3998 finfo.contents = NULL;
4000 if (finfo.external_relocs != NULL)
4002 free (finfo.external_relocs);
4003 finfo.external_relocs = NULL;
4006 /* The value of the last C_FILE symbol is supposed to be -1. Write
4008 if (finfo.last_file_index != -1)
4010 finfo.last_file.n_value = -1;
4011 bfd_coff_swap_sym_out (abfd, (PTR) &finfo.last_file,
4012 (PTR) finfo.outsyms);
4014 (obj_sym_filepos (abfd)
4015 + finfo.last_file_index * symesz),
4017 || bfd_write (finfo.outsyms, symesz, 1, abfd) != symesz)
4021 /* Write out all the global symbols which do not come from XCOFF
4023 xcoff_link_hash_traverse (xcoff_hash_table (info),
4024 xcoff_write_global_symbol,
4027 if (finfo.outsyms != NULL)
4029 free (finfo.outsyms);
4030 finfo.outsyms = NULL;
4033 /* Now that we have written out all the global symbols, we know the
4034 symbol indices to use for relocs against them, and we can finally
4035 write out the relocs. */
4036 external_relocs = (bfd_byte *) malloc (max_output_reloc_count * relsz);
4037 if (external_relocs == NULL && max_output_reloc_count != 0)
4039 bfd_set_error (bfd_error_no_memory);
4043 for (o = abfd->sections; o != NULL; o = o->next)
4045 struct internal_reloc *irel;
4046 struct internal_reloc *irelend;
4047 struct xcoff_link_hash_entry **rel_hash;
4048 struct xcoff_toc_rel_hash *toc_rel_hash;
4051 if (o->reloc_count == 0)
4054 irel = finfo.section_info[o->target_index].relocs;
4055 irelend = irel + o->reloc_count;
4056 rel_hash = finfo.section_info[o->target_index].rel_hashes;
4057 for (; irel < irelend; irel++, rel_hash++, erel += relsz)
4059 if (*rel_hash != NULL)
4061 if ((*rel_hash)->indx < 0)
4063 if (! ((*info->callbacks->unattached_reloc)
4064 (info, (*rel_hash)->root.root.string,
4065 (bfd *) NULL, o, irel->r_vaddr)))
4067 (*rel_hash)->indx = 0;
4069 irel->r_symndx = (*rel_hash)->indx;
4073 for (toc_rel_hash = finfo.section_info[o->target_index].toc_rel_hashes;
4074 toc_rel_hash != NULL;
4075 toc_rel_hash = toc_rel_hash->next)
4077 if (toc_rel_hash->h->u.toc_indx < 0)
4079 if (! ((*info->callbacks->unattached_reloc)
4080 (info, toc_rel_hash->h->root.root.string,
4081 (bfd *) NULL, o, toc_rel_hash->rel->r_vaddr)))
4083 toc_rel_hash->h->u.toc_indx = 0;
4085 toc_rel_hash->rel->r_symndx = toc_rel_hash->h->u.toc_indx;
4088 /* XCOFF requires that the relocs be sorted by address. We tend
4089 to produce them in the order in which their containing csects
4090 appear in the symbol table, which is not necessarily by
4091 address. So we sort them here. There may be a better way to
4093 qsort ((PTR) finfo.section_info[o->target_index].relocs,
4094 o->reloc_count, sizeof (struct internal_reloc),
4097 irel = finfo.section_info[o->target_index].relocs;
4098 irelend = irel + o->reloc_count;
4099 erel = external_relocs;
4100 for (; irel < irelend; irel++, rel_hash++, erel += relsz)
4101 bfd_coff_swap_reloc_out (abfd, (PTR) irel, (PTR) erel);
4103 if (bfd_seek (abfd, o->rel_filepos, SEEK_SET) != 0
4104 || bfd_write ((PTR) external_relocs, relsz, o->reloc_count,
4105 abfd) != relsz * o->reloc_count)
4109 if (external_relocs != NULL)
4111 free (external_relocs);
4112 external_relocs = NULL;
4115 /* Free up the section information. */
4116 if (finfo.section_info != NULL)
4120 for (i = 0; i < abfd->section_count; i++)
4122 if (finfo.section_info[i].relocs != NULL)
4123 free (finfo.section_info[i].relocs);
4124 if (finfo.section_info[i].rel_hashes != NULL)
4125 free (finfo.section_info[i].rel_hashes);
4127 free (finfo.section_info);
4128 finfo.section_info = NULL;
4131 /* Write out the loader section contents. */
4132 BFD_ASSERT ((bfd_byte *) finfo.ldrel
4133 == (xcoff_hash_table (info)->loader_section->contents
4134 + xcoff_hash_table (info)->ldhdr.l_impoff));
4135 o = xcoff_hash_table (info)->loader_section;
4136 if (! bfd_set_section_contents (abfd, o->output_section,
4137 o->contents, o->output_offset,
4141 /* Write out the magic sections. */
4142 o = xcoff_hash_table (info)->linkage_section;
4143 if (o->_raw_size > 0
4144 && ! bfd_set_section_contents (abfd, o->output_section, o->contents,
4145 o->output_offset, o->_raw_size))
4147 o = xcoff_hash_table (info)->toc_section;
4148 if (o->_raw_size > 0
4149 && ! bfd_set_section_contents (abfd, o->output_section, o->contents,
4150 o->output_offset, o->_raw_size))
4152 o = xcoff_hash_table (info)->descriptor_section;
4153 if (o->_raw_size > 0
4154 && ! bfd_set_section_contents (abfd, o->output_section, o->contents,
4155 o->output_offset, o->_raw_size))
4158 /* Write out the string table. */
4160 (obj_sym_filepos (abfd)
4161 + obj_raw_syment_count (abfd) * symesz),
4165 _bfd_stringtab_size (finfo.strtab) + STRING_SIZE_SIZE,
4166 (bfd_byte *) strbuf);
4167 if (bfd_write (strbuf, 1, STRING_SIZE_SIZE, abfd) != STRING_SIZE_SIZE)
4169 if (! _bfd_stringtab_emit (abfd, finfo.strtab))
4172 _bfd_stringtab_free (finfo.strtab);
4174 /* Write out the debugging string table. */
4175 o = xcoff_hash_table (info)->debug_section;
4178 struct bfd_strtab_hash *debug_strtab;
4180 debug_strtab = xcoff_hash_table (info)->debug_strtab;
4181 BFD_ASSERT (o->output_section->_raw_size - o->output_offset
4182 >= _bfd_stringtab_size (debug_strtab));
4184 o->output_section->filepos + o->output_offset,
4187 if (! _bfd_stringtab_emit (abfd, debug_strtab))
4191 /* Setting bfd_get_symcount to 0 will cause write_object_contents to
4192 not try to write out the symbols. */
4193 bfd_get_symcount (abfd) = 0;
4198 if (finfo.strtab != NULL)
4199 _bfd_stringtab_free (finfo.strtab);
4200 if (finfo.section_info != NULL)
4204 for (i = 0; i < abfd->section_count; i++)
4206 if (finfo.section_info[i].relocs != NULL)
4207 free (finfo.section_info[i].relocs);
4208 if (finfo.section_info[i].rel_hashes != NULL)
4209 free (finfo.section_info[i].rel_hashes);
4211 free (finfo.section_info);
4213 if (finfo.internal_syms != NULL)
4214 free (finfo.internal_syms);
4215 if (finfo.sym_indices != NULL)
4216 free (finfo.sym_indices);
4217 if (finfo.outsyms != NULL)
4218 free (finfo.outsyms);
4219 if (finfo.linenos != NULL)
4220 free (finfo.linenos);
4221 if (finfo.contents != NULL)
4222 free (finfo.contents);
4223 if (finfo.external_relocs != NULL)
4224 free (finfo.external_relocs);
4225 if (external_relocs != NULL)
4226 free (external_relocs);
4230 /* Link an input file into the linker output file. This function
4231 handles all the sections and relocations of the input file at once. */
4234 xcoff_link_input_bfd (finfo, input_bfd)
4235 struct xcoff_final_link_info *finfo;
4239 const char *strings;
4240 bfd_size_type syment_base;
4241 unsigned int n_tmask;
4242 unsigned int n_btshft;
4244 bfd_size_type isymesz;
4245 bfd_size_type osymesz;
4246 bfd_size_type linesz;
4249 struct xcoff_link_hash_entry **sym_hash;
4250 struct internal_syment *isymp;
4252 unsigned long *debug_index;
4254 unsigned long output_index;
4261 /* We can just skip DYNAMIC files, unless this is a static link. */
4262 if ((input_bfd->flags & DYNAMIC) != 0
4263 && ! finfo->info->static_link)
4266 /* Move all the symbols to the output file. */
4268 output_bfd = finfo->output_bfd;
4270 syment_base = obj_raw_syment_count (output_bfd);
4271 isymesz = bfd_coff_symesz (input_bfd);
4272 osymesz = bfd_coff_symesz (output_bfd);
4273 linesz = bfd_coff_linesz (input_bfd);
4274 BFD_ASSERT (linesz == bfd_coff_linesz (output_bfd));
4276 n_tmask = coff_data (input_bfd)->local_n_tmask;
4277 n_btshft = coff_data (input_bfd)->local_n_btshft;
4279 /* Define macros so that ISFCN, et. al., macros work correctly. */
4280 #define N_TMASK n_tmask
4281 #define N_BTSHFT n_btshft
4284 if (! finfo->info->keep_memory)
4287 if ((output_bfd->flags & BFD_TRADITIONAL_FORMAT) != 0)
4290 if (! _bfd_coff_get_external_symbols (input_bfd))
4293 esym = (bfd_byte *) obj_coff_external_syms (input_bfd);
4294 esym_end = esym + obj_raw_syment_count (input_bfd) * isymesz;
4295 sym_hash = obj_xcoff_sym_hashes (input_bfd);
4296 csectpp = xcoff_data (input_bfd)->csects;
4297 debug_index = xcoff_data (input_bfd)->debug_indices;
4298 isymp = finfo->internal_syms;
4299 indexp = finfo->sym_indices;
4300 output_index = syment_base;
4301 outsym = finfo->outsyms;
4305 while (esym < esym_end)
4307 struct internal_syment isym;
4308 union internal_auxent aux;
4314 bfd_coff_swap_sym_in (input_bfd, (PTR) esym, (PTR) isymp);
4316 /* If this is a C_EXT or C_HIDEXT symbol, we need the csect
4318 if (isymp->n_sclass == C_EXT || isymp->n_sclass == C_HIDEXT)
4320 BFD_ASSERT (isymp->n_numaux > 0);
4321 bfd_coff_swap_aux_in (input_bfd,
4322 (PTR) (esym + isymesz * isymp->n_numaux),
4323 isymp->n_type, isymp->n_sclass,
4324 isymp->n_numaux - 1, isymp->n_numaux,
4326 smtyp = SMTYP_SMTYP (aux.x_csect.x_smtyp);
4329 /* Make a copy of *isymp so that the relocate_section function
4330 always sees the original values. This is more reliable than
4331 always recomputing the symbol value even if we are stripping
4335 /* If this symbol is in the .loader section, swap out the
4336 .loader symbol information. If this is an external symbol
4337 reference to a defined symbol, though, then wait until we get
4338 to the definition. */
4339 if (isym.n_sclass == C_EXT
4340 && *sym_hash != NULL
4341 && (*sym_hash)->ldsym != NULL
4343 || (*sym_hash)->root.type == bfd_link_hash_undefined))
4345 struct xcoff_link_hash_entry *h;
4346 struct internal_ldsym *ldsym;
4350 if (isym.n_scnum > 0)
4352 ldsym->l_scnum = (*csectpp)->output_section->target_index;
4353 ldsym->l_value = (isym.n_value
4354 + (*csectpp)->output_section->vma
4355 + (*csectpp)->output_offset
4360 ldsym->l_scnum = isym.n_scnum;
4361 ldsym->l_value = isym.n_value;
4364 ldsym->l_smtype = smtyp;
4365 if (((h->flags & XCOFF_DEF_REGULAR) == 0
4366 && (h->flags & XCOFF_DEF_DYNAMIC) != 0)
4367 || (h->flags & XCOFF_IMPORT) != 0)
4368 ldsym->l_smtype |= L_IMPORT;
4369 if (((h->flags & XCOFF_DEF_REGULAR) != 0
4370 && (h->flags & XCOFF_DEF_DYNAMIC) != 0)
4371 || (h->flags & XCOFF_EXPORT) != 0)
4372 ldsym->l_smtype |= L_EXPORT;
4373 if ((h->flags & XCOFF_ENTRY) != 0)
4374 ldsym->l_smtype |= L_ENTRY;
4376 ldsym->l_smclas = aux.x_csect.x_smclas;
4378 if (ldsym->l_ifile == (bfd_size_type) -1)
4380 else if (ldsym->l_ifile == 0)
4382 if ((ldsym->l_smtype & L_IMPORT) == 0)
4388 if (h->root.type == bfd_link_hash_defined
4389 || h->root.type == bfd_link_hash_defweak)
4390 impbfd = h->root.u.def.section->owner;
4391 else if (h->root.type == bfd_link_hash_undefined
4392 || h->root.type == bfd_link_hash_undefweak)
4393 impbfd = h->root.u.undef.abfd;
4401 BFD_ASSERT (impbfd->xvec == finfo->output_bfd->xvec);
4402 ldsym->l_ifile = xcoff_data (impbfd)->import_file_id;
4409 BFD_ASSERT (h->ldindx >= 0);
4410 BFD_ASSERT (LDSYMSZ == sizeof (struct external_ldsym));
4411 xcoff_swap_ldsym_out (finfo->output_bfd, ldsym,
4412 finfo->ldsym + h->ldindx - 3);
4415 /* Fill in snentry now that we know the target_index. */
4416 if ((h->flags & XCOFF_ENTRY) != 0
4417 && (h->root.type == bfd_link_hash_defined
4418 || h->root.type == bfd_link_hash_defweak))
4419 xcoff_data (output_bfd)->snentry =
4420 h->root.u.def.section->output_section->target_index;
4427 add = 1 + isym.n_numaux;
4429 /* If we are skipping this csect, we want to skip this symbol. */
4430 if (*csectpp == NULL)
4433 /* If we garbage collected this csect, we want to skip this
4436 && xcoff_hash_table (finfo->info)->gc
4437 && ((*csectpp)->flags & SEC_MARK) == 0
4438 && *csectpp != bfd_abs_section_ptr)
4441 /* An XCOFF linker always skips C_STAT symbols. */
4443 && isymp->n_sclass == C_STAT)
4446 /* We skip all but the first TOC anchor. */
4448 && isymp->n_sclass == C_HIDEXT
4449 && aux.x_csect.x_smclas == XMC_TC0)
4451 if (finfo->toc_symindx != -1)
4455 bfd_vma tocval, tocend;
4457 tocval = ((*csectpp)->output_section->vma
4458 + (*csectpp)->output_offset
4461 /* We want to find out if tocval is a good value to use
4462 as the TOC anchor--that is, whether we can access all
4463 of the TOC using a 16 bit offset from tocval. This
4464 test assumes that the TOC comes at the end of the
4465 output section, as it does in the default linker
4468 tocend = ((*csectpp)->output_section->vma
4469 + (*csectpp)->output_section->_raw_size);
4471 if (tocval + 0x10000 < tocend)
4473 (*_bfd_error_handler)
4474 ("TOC overflow: 0x%lx > 0x10000; try -mminimal-toc when compiling",
4475 (unsigned long) (tocend - tocval));
4476 bfd_set_error (bfd_error_file_too_big);
4480 if (tocval + 0x8000 < tocend)
4484 tocadd = tocend - (tocval + 0x8000);
4486 isym.n_value += tocadd;
4489 finfo->toc_symindx = output_index;
4490 xcoff_data (finfo->output_bfd)->toc = tocval;
4491 xcoff_data (finfo->output_bfd)->sntoc =
4492 (*csectpp)->output_section->target_index;
4497 /* If we are stripping all symbols, we want to skip this one. */
4499 && finfo->info->strip == strip_all)
4502 /* We can skip resolved external references. */
4504 && isym.n_sclass == C_EXT
4506 && (*sym_hash)->root.type != bfd_link_hash_undefined)
4509 /* We can skip common symbols if they got defined somewhere
4512 && isym.n_sclass == C_EXT
4514 && ((*sym_hash)->root.type != bfd_link_hash_common
4515 || (*sym_hash)->root.u.c.p->section != *csectpp)
4516 && ((*sym_hash)->root.type != bfd_link_hash_defined
4517 || (*sym_hash)->root.u.def.section != *csectpp))
4520 /* Skip local symbols if we are discarding them. */
4522 && finfo->info->discard == discard_all
4523 && isym.n_sclass != C_EXT
4524 && (isym.n_sclass != C_HIDEXT
4525 || smtyp != XTY_SD))
4528 /* If we stripping debugging symbols, and this is a debugging
4529 symbol, then skip it. */
4531 && finfo->info->strip == strip_debugger
4532 && isym.n_scnum == N_DEBUG)
4535 /* If some symbols are stripped based on the name, work out the
4536 name and decide whether to skip this symbol. We don't handle
4537 this correctly for symbols whose names are in the .debug
4538 section; to get it right we would need a new bfd_strtab_hash
4539 function to return the string given the index. */
4541 && (finfo->info->strip == strip_some
4542 || finfo->info->discard == discard_l)
4543 && (debug_index == NULL || *debug_index == (unsigned long) -1))
4546 char buf[SYMNMLEN + 1];
4548 name = _bfd_coff_internal_syment_name (input_bfd, &isym, buf);
4552 if ((finfo->info->strip == strip_some
4553 && (bfd_hash_lookup (finfo->info->keep_hash, name, false,
4555 || (finfo->info->discard == discard_l
4556 && (isym.n_sclass != C_EXT
4557 && (isym.n_sclass != C_HIDEXT
4558 || smtyp != XTY_SD))
4559 && strncmp (name, finfo->info->lprefix,
4560 finfo->info->lprefix_len) == 0))
4564 /* We can not skip the first TOC anchor. */
4567 && finfo->info->strip != strip_all)
4570 /* We now know whether we are to skip this symbol or not. */
4573 /* Adjust the symbol in order to output it. */
4575 if (isym._n._n_n._n_zeroes == 0
4576 && isym._n._n_n._n_offset != 0)
4578 /* This symbol has a long name. Enter it in the string
4579 table we are building. If *debug_index != -1, the
4580 name has already been entered in the .debug section. */
4581 if (debug_index != NULL && *debug_index != (unsigned long) -1)
4582 isym._n._n_n._n_offset = *debug_index;
4588 name = _bfd_coff_internal_syment_name (input_bfd, &isym,
4592 indx = _bfd_stringtab_add (finfo->strtab, name, hash, copy);
4593 if (indx == (bfd_size_type) -1)
4595 isym._n._n_n._n_offset = STRING_SIZE_SIZE + indx;
4599 if (isym.n_sclass != C_BSTAT
4600 && isym.n_sclass != C_ESTAT
4601 && isym.n_sclass != C_DECL
4602 && isym.n_scnum > 0)
4604 isym.n_scnum = (*csectpp)->output_section->target_index;
4605 isym.n_value += ((*csectpp)->output_section->vma
4606 + (*csectpp)->output_offset
4610 /* The value of a C_FILE symbol is the symbol index of the
4611 next C_FILE symbol. The value of the last C_FILE symbol
4612 is -1. We try to get this right, below, just before we
4613 write the symbols out, but in the general case we may
4614 have to write the symbol out twice. */
4615 if (isym.n_sclass == C_FILE)
4617 if (finfo->last_file_index != -1
4618 && finfo->last_file.n_value != (long) output_index)
4620 /* We must correct the value of the last C_FILE entry. */
4621 finfo->last_file.n_value = output_index;
4622 if ((bfd_size_type) finfo->last_file_index >= syment_base)
4624 /* The last C_FILE symbol is in this input file. */
4625 bfd_coff_swap_sym_out (output_bfd,
4626 (PTR) &finfo->last_file,
4627 (PTR) (finfo->outsyms
4628 + ((finfo->last_file_index
4634 /* We have already written out the last C_FILE
4635 symbol. We need to write it out again. We
4636 borrow *outsym temporarily. */
4637 bfd_coff_swap_sym_out (output_bfd,
4638 (PTR) &finfo->last_file,
4640 if (bfd_seek (output_bfd,
4641 (obj_sym_filepos (output_bfd)
4642 + finfo->last_file_index * osymesz),
4644 || (bfd_write (outsym, osymesz, 1, output_bfd)
4650 finfo->last_file_index = output_index;
4651 finfo->last_file = isym;
4654 /* The value of a C_BINCL or C_EINCL symbol is a file offset
4655 into the line numbers. We update the symbol values when
4656 we handle the line numbers. */
4657 if (isym.n_sclass == C_BINCL
4658 || isym.n_sclass == C_EINCL)
4660 isym.n_value = finfo->line_filepos;
4664 /* Output the symbol. */
4666 bfd_coff_swap_sym_out (output_bfd, (PTR) &isym, (PTR) outsym);
4668 *indexp = output_index;
4670 if (isym.n_sclass == C_EXT)
4673 struct xcoff_link_hash_entry *h;
4675 indx = ((esym - (bfd_byte *) obj_coff_external_syms (input_bfd))
4677 h = obj_xcoff_sym_hashes (input_bfd)[indx];
4678 BFD_ASSERT (h != NULL);
4679 h->indx = output_index;
4682 /* If this is a symbol in the TOC which we may have merged
4683 (class XMC_TC), remember the symbol index of the TOC
4685 if (isym.n_sclass == C_HIDEXT
4686 && aux.x_csect.x_smclas == XMC_TC
4687 && *sym_hash != NULL)
4689 BFD_ASSERT (((*sym_hash)->flags & XCOFF_SET_TOC) == 0);
4690 BFD_ASSERT ((*sym_hash)->toc_section != NULL);
4691 (*sym_hash)->u.toc_indx = output_index;
4694 output_index += add;
4695 outsym += add * osymesz;
4698 esym += add * isymesz;
4702 if (debug_index != NULL)
4705 for (--add; add > 0; --add)
4709 /* Fix up the aux entries and the C_BSTAT symbols. This must be
4710 done in a separate pass, because we don't know the correct symbol
4711 indices until we have already decided which symbols we are going
4714 esym = (bfd_byte *) obj_coff_external_syms (input_bfd);
4715 esym_end = esym + obj_raw_syment_count (input_bfd) * isymesz;
4716 isymp = finfo->internal_syms;
4717 indexp = finfo->sym_indices;
4718 csectpp = xcoff_data (input_bfd)->csects;
4719 outsym = finfo->outsyms;
4720 while (esym < esym_end)
4724 add = 1 + isymp->n_numaux;
4727 esym += add * isymesz;
4732 if (isymp->n_sclass == C_BSTAT)
4734 struct internal_syment isym;
4737 /* The value of a C_BSTAT symbol is the symbol table
4738 index of the containing csect. */
4739 bfd_coff_swap_sym_in (output_bfd, (PTR) outsym, (PTR) &isym);
4740 indx = isym.n_value;
4741 if (indx < obj_raw_syment_count (input_bfd))
4745 symindx = finfo->sym_indices[indx];
4749 isym.n_value = symindx;
4750 bfd_coff_swap_sym_out (output_bfd, (PTR) &isym,
4758 for (i = 0; i < isymp->n_numaux && esym < esym_end; i++)
4760 union internal_auxent aux;
4762 bfd_coff_swap_aux_in (input_bfd, (PTR) esym, isymp->n_type,
4763 isymp->n_sclass, i, isymp->n_numaux,
4766 if (isymp->n_sclass == C_FILE)
4768 /* This is the file name (or some comment put in by
4769 the compiler). If it is long, we must put it in
4770 the string table. */
4771 if (aux.x_file.x_n.x_zeroes == 0
4772 && aux.x_file.x_n.x_offset != 0)
4774 const char *filename;
4777 BFD_ASSERT (aux.x_file.x_n.x_offset
4778 >= STRING_SIZE_SIZE);
4779 if (strings == NULL)
4781 strings = _bfd_coff_read_string_table (input_bfd);
4782 if (strings == NULL)
4785 filename = strings + aux.x_file.x_n.x_offset;
4786 indx = _bfd_stringtab_add (finfo->strtab, filename,
4788 if (indx == (bfd_size_type) -1)
4790 aux.x_file.x_n.x_offset = STRING_SIZE_SIZE + indx;
4793 else if ((isymp->n_sclass == C_EXT
4794 || isymp->n_sclass == C_HIDEXT)
4795 && i + 1 == isymp->n_numaux)
4797 /* We don't support type checking. I don't know if
4799 aux.x_csect.x_parmhash = 0;
4800 /* I don't think anybody uses these fields, but we'd
4801 better clobber them just in case. */
4802 aux.x_csect.x_stab = 0;
4803 aux.x_csect.x_snstab = 0;
4804 if (SMTYP_SMTYP (aux.x_csect.x_smtyp) == XTY_LD)
4808 indx = aux.x_csect.x_scnlen.l;
4809 if (indx < obj_raw_syment_count (input_bfd))
4813 symindx = finfo->sym_indices[indx];
4815 aux.x_sym.x_tagndx.l = 0;
4817 aux.x_sym.x_tagndx.l = symindx;
4821 else if (isymp->n_sclass != C_STAT || isymp->n_type != T_NULL)
4825 if (ISFCN (isymp->n_type)
4826 || ISTAG (isymp->n_sclass)
4827 || isymp->n_sclass == C_BLOCK
4828 || isymp->n_sclass == C_FCN)
4830 indx = aux.x_sym.x_fcnary.x_fcn.x_endndx.l;
4832 && indx < obj_raw_syment_count (input_bfd))
4834 /* We look forward through the symbol for
4835 the index of the next symbol we are going
4836 to include. I don't know if this is
4838 while (finfo->sym_indices[indx] < 0
4839 && indx < obj_raw_syment_count (input_bfd))
4841 if (indx >= obj_raw_syment_count (input_bfd))
4842 indx = output_index;
4844 indx = finfo->sym_indices[indx];
4845 aux.x_sym.x_fcnary.x_fcn.x_endndx.l = indx;
4849 indx = aux.x_sym.x_tagndx.l;
4850 if (indx > 0 && indx < obj_raw_syment_count (input_bfd))
4854 symindx = finfo->sym_indices[indx];
4856 aux.x_sym.x_tagndx.l = 0;
4858 aux.x_sym.x_tagndx.l = symindx;
4862 /* Copy over the line numbers, unless we are stripping
4863 them. We do this on a symbol by symbol basis in
4864 order to more easily handle garbage collection. */
4865 if ((isymp->n_sclass == C_EXT
4866 || isymp->n_sclass == C_HIDEXT)
4868 && isymp->n_numaux > 1
4869 && ISFCN (isymp->n_type)
4870 && aux.x_sym.x_fcnary.x_fcn.x_lnnoptr != 0)
4872 if (finfo->info->strip != strip_none
4873 && finfo->info->strip != strip_some)
4874 aux.x_sym.x_fcnary.x_fcn.x_lnnoptr = 0;
4877 asection *enclosing;
4878 unsigned int enc_count;
4879 bfd_size_type linoff;
4880 struct internal_lineno lin;
4883 enclosing = xcoff_section_data (abfd, o)->enclosing;
4884 enc_count = xcoff_section_data (abfd, o)->lineno_count;
4885 if (oline != enclosing)
4887 if (bfd_seek (input_bfd,
4888 enclosing->line_filepos,
4890 || (bfd_read (finfo->linenos, linesz,
4891 enc_count, input_bfd)
4892 != linesz * enc_count))
4897 linoff = (aux.x_sym.x_fcnary.x_fcn.x_lnnoptr
4898 - enclosing->line_filepos);
4900 bfd_coff_swap_lineno_in (input_bfd,
4901 (PTR) (finfo->linenos + linoff),
4904 || ((bfd_size_type) lin.l_addr.l_symndx
4908 obj_coff_external_syms (input_bfd)))
4910 aux.x_sym.x_fcnary.x_fcn.x_lnnoptr = 0;
4913 bfd_byte *linpend, *linp;
4915 bfd_size_type count;
4917 lin.l_addr.l_symndx = *indexp;
4918 bfd_coff_swap_lineno_out (output_bfd, (PTR) &lin,
4919 (PTR) (finfo->linenos
4922 linpend = (finfo->linenos
4923 + enc_count * linesz);
4924 offset = (o->output_section->vma
4927 for (linp = finfo->linenos + linoff + linesz;
4931 bfd_coff_swap_lineno_in (input_bfd, (PTR) linp,
4933 if (lin.l_lnno == 0)
4935 lin.l_addr.l_paddr += offset;
4936 bfd_coff_swap_lineno_out (output_bfd,
4941 count = (linp - (finfo->linenos + linoff)) / linesz;
4943 aux.x_sym.x_fcnary.x_fcn.x_lnnoptr =
4944 (o->output_section->line_filepos
4945 + o->output_section->lineno_count * linesz);
4947 if (bfd_seek (output_bfd,
4948 aux.x_sym.x_fcnary.x_fcn.x_lnnoptr,
4950 || (bfd_write (finfo->linenos + linoff,
4951 linesz, count, output_bfd)
4955 o->output_section->lineno_count += count;
4959 struct internal_syment *iisp, *iispend;
4964 /* Update any C_BINCL or C_EINCL symbols
4965 that refer to a line number in the
4966 range we just output. */
4967 iisp = finfo->internal_syms;
4969 + obj_raw_syment_count (input_bfd));
4970 iindp = finfo->sym_indices;
4971 oos = finfo->outsyms;
4972 while (iisp < iispend)
4975 && (iisp->n_sclass == C_BINCL
4976 || iisp->n_sclass == C_EINCL)
4977 && ((bfd_size_type) iisp->n_value
4978 >= enclosing->line_filepos + linoff)
4979 && ((bfd_size_type) iisp->n_value
4980 < (enclosing->line_filepos
4981 + enc_count * linesz)))
4983 struct internal_syment iis;
4985 bfd_coff_swap_sym_in (output_bfd,
4990 - enclosing->line_filepos
4992 + aux.x_sym.x_fcnary.x_fcn.x_lnnoptr);
4993 bfd_coff_swap_sym_out (output_bfd,
4999 iiadd = 1 + iisp->n_numaux;
5001 oos += iiadd * osymesz;
5010 bfd_coff_swap_aux_out (output_bfd, (PTR) &aux, isymp->n_type,
5011 isymp->n_sclass, i, isymp->n_numaux,
5023 /* If we swapped out a C_FILE symbol, guess that the next C_FILE
5024 symbol will be the first symbol in the next input file. In the
5025 normal case, this will save us from writing out the C_FILE symbol
5027 if (finfo->last_file_index != -1
5028 && (bfd_size_type) finfo->last_file_index >= syment_base)
5030 finfo->last_file.n_value = output_index;
5031 bfd_coff_swap_sym_out (output_bfd, (PTR) &finfo->last_file,
5032 (PTR) (finfo->outsyms
5033 + ((finfo->last_file_index - syment_base)
5037 /* Write the modified symbols to the output file. */
5038 if (outsym > finfo->outsyms)
5040 if (bfd_seek (output_bfd,
5041 obj_sym_filepos (output_bfd) + syment_base * osymesz,
5043 || (bfd_write (finfo->outsyms, outsym - finfo->outsyms, 1,
5045 != (bfd_size_type) (outsym - finfo->outsyms)))
5048 BFD_ASSERT ((obj_raw_syment_count (output_bfd)
5049 + (outsym - finfo->outsyms) / osymesz)
5052 obj_raw_syment_count (output_bfd) = output_index;
5055 /* Don't let the linker relocation routines discard the symbols. */
5056 keep_syms = obj_coff_keep_syms (input_bfd);
5057 obj_coff_keep_syms (input_bfd) = true;
5059 /* Relocate the contents of each section. */
5060 for (o = input_bfd->sections; o != NULL; o = o->next)
5064 if (! o->linker_mark)
5066 /* This section was omitted from the link. */
5070 if ((o->flags & SEC_HAS_CONTENTS) == 0
5071 || o->_raw_size == 0
5072 || (o->flags & SEC_IN_MEMORY) != 0)
5075 /* We have set filepos correctly for the sections we created to
5076 represent csects, so bfd_get_section_contents should work. */
5077 if (coff_section_data (input_bfd, o) != NULL
5078 && coff_section_data (input_bfd, o)->contents != NULL)
5079 contents = coff_section_data (input_bfd, o)->contents;
5082 if (! bfd_get_section_contents (input_bfd, o, finfo->contents,
5083 (file_ptr) 0, o->_raw_size))
5085 contents = finfo->contents;
5088 if ((o->flags & SEC_RELOC) != 0)
5091 struct internal_reloc *internal_relocs;
5092 struct internal_reloc *irel;
5094 struct internal_reloc *irelend;
5095 struct xcoff_link_hash_entry **rel_hash;
5098 /* Read in the relocs. */
5099 target_index = o->output_section->target_index;
5100 internal_relocs = (xcoff_read_internal_relocs
5101 (input_bfd, o, false, finfo->external_relocs,
5103 (finfo->section_info[target_index].relocs
5104 + o->output_section->reloc_count)));
5105 if (internal_relocs == NULL)
5108 /* Call processor specific code to relocate the section
5110 if (! bfd_coff_relocate_section (output_bfd, finfo->info,
5114 finfo->internal_syms,
5115 xcoff_data (input_bfd)->csects))
5118 offset = o->output_section->vma + o->output_offset - o->vma;
5119 irel = internal_relocs;
5120 irelend = irel + o->reloc_count;
5121 rel_hash = (finfo->section_info[target_index].rel_hashes
5122 + o->output_section->reloc_count);
5123 for (; irel < irelend; irel++, rel_hash++)
5125 struct xcoff_link_hash_entry *h = NULL;
5126 struct internal_ldrel ldrel;
5130 /* Adjust the reloc address and symbol index. */
5132 irel->r_vaddr += offset;
5134 r_symndx = irel->r_symndx;
5138 h = obj_xcoff_sym_hashes (input_bfd)[r_symndx];
5140 && h->smclas != XMC_TD
5141 && (irel->r_type == R_TOC
5142 || irel->r_type == R_GL
5143 || irel->r_type == R_TCL
5144 || irel->r_type == R_TRL
5145 || irel->r_type == R_TRLA))
5147 /* This is a TOC relative reloc with a symbol
5148 attached. The symbol should be the one which
5149 this reloc is for. We want to make this
5150 reloc against the TOC address of the symbol,
5151 not the symbol itself. */
5152 BFD_ASSERT (h->toc_section != NULL);
5153 BFD_ASSERT ((h->flags & XCOFF_SET_TOC) == 0);
5154 if (h->u.toc_indx != -1)
5155 irel->r_symndx = h->u.toc_indx;
5158 struct xcoff_toc_rel_hash *n;
5159 struct xcoff_link_section_info *si;
5161 n = ((struct xcoff_toc_rel_hash *)
5162 bfd_alloc (finfo->output_bfd,
5163 sizeof (struct xcoff_toc_rel_hash)));
5166 si = finfo->section_info + target_index;
5167 n->next = si->toc_rel_hashes;
5170 si->toc_rel_hashes = n;
5175 /* This is a global symbol. */
5177 irel->r_symndx = h->indx;
5180 /* This symbol is being written at the end
5181 of the file, and we do not yet know the
5182 symbol index. We save the pointer to the
5183 hash table entry in the rel_hash list.
5184 We set the indx field to -2 to indicate
5185 that this symbol must not be stripped. */
5194 indx = finfo->sym_indices[r_symndx];
5198 struct internal_syment *is;
5200 /* Relocations against a TC0 TOC anchor are
5201 automatically transformed to be against
5202 the TOC anchor in the output file. */
5203 is = finfo->internal_syms + r_symndx;
5204 if (is->n_sclass == C_HIDEXT
5205 && is->n_numaux > 0)
5208 union internal_auxent aux;
5212 obj_coff_external_syms (input_bfd))
5213 + ((r_symndx + is->n_numaux)
5215 bfd_coff_swap_aux_in (input_bfd, auxptr,
5216 is->n_type, is->n_sclass,
5220 if (SMTYP_SMTYP (aux.x_csect.x_smtyp) == XTY_SD
5221 && aux.x_csect.x_smclas == XMC_TC0)
5222 indx = finfo->toc_symindx;
5227 irel->r_symndx = indx;
5230 struct internal_syment *is;
5232 char buf[SYMNMLEN + 1];
5234 /* This reloc is against a symbol we are
5235 stripping. It would be possible to handle
5236 this case, but I don't think it's worth it. */
5237 is = finfo->internal_syms + r_symndx;
5239 name = (_bfd_coff_internal_syment_name
5240 (input_bfd, is, buf));
5244 if (! ((*finfo->info->callbacks->unattached_reloc)
5245 (finfo->info, name, input_bfd, o,
5252 switch (irel->r_type)
5256 || h->root.type == bfd_link_hash_defined
5257 || h->root.type == bfd_link_hash_defweak
5258 || h->root.type == bfd_link_hash_common)
5265 /* This reloc needs to be copied into the .loader
5267 ldrel.l_vaddr = irel->r_vaddr;
5269 ldrel.l_symndx = -1;
5271 || (h->root.type == bfd_link_hash_defined
5272 || h->root.type == bfd_link_hash_defweak
5273 || h->root.type == bfd_link_hash_common))
5278 sec = xcoff_data (input_bfd)->csects[r_symndx];
5279 else if (h->root.type == bfd_link_hash_common)
5280 sec = h->root.u.c.p->section;
5282 sec = h->root.u.def.section;
5283 sec = sec->output_section;
5285 if (strcmp (sec->name, ".text") == 0)
5287 else if (strcmp (sec->name, ".data") == 0)
5289 else if (strcmp (sec->name, ".bss") == 0)
5293 (*_bfd_error_handler)
5294 ("%s: loader reloc in unrecognized section `%s'",
5295 bfd_get_filename (input_bfd),
5297 bfd_set_error (bfd_error_nonrepresentable_section);
5305 (*_bfd_error_handler)
5306 ("%s: `%s' in loader reloc but not loader sym",
5307 bfd_get_filename (input_bfd),
5308 h->root.root.string);
5309 bfd_set_error (bfd_error_bad_value);
5312 ldrel.l_symndx = h->ldindx;
5314 ldrel.l_rtype = (irel->r_size << 8) | irel->r_type;
5315 ldrel.l_rsecnm = o->output_section->target_index;
5316 if (xcoff_hash_table (finfo->info)->textro
5317 && strcmp (o->output_section->name, ".text") == 0)
5319 (*_bfd_error_handler)
5320 ("%s: loader reloc in read-only section %s",
5321 bfd_get_filename (input_bfd),
5322 bfd_get_section_name (finfo->output_bfd,
5323 o->output_section));
5324 bfd_set_error (bfd_error_invalid_operation);
5327 xcoff_swap_ldrel_out (output_bfd, &ldrel,
5329 BFD_ASSERT (sizeof (struct external_ldrel) == LDRELSZ);
5338 /* We should never need a .loader reloc for a TOC
5344 o->output_section->reloc_count += o->reloc_count;
5347 /* Write out the modified section contents. */
5348 if (! bfd_set_section_contents (output_bfd, o->output_section,
5349 contents, o->output_offset,
5350 (o->_cooked_size != 0
5356 obj_coff_keep_syms (input_bfd) = keep_syms;
5358 if (! finfo->info->keep_memory)
5360 if (! _bfd_coff_free_symbols (input_bfd))
5370 /* Write out a non-XCOFF global symbol. */
5373 xcoff_write_global_symbol (h, p)
5374 struct xcoff_link_hash_entry *h;
5377 struct xcoff_final_link_info *finfo = (struct xcoff_final_link_info *) p;
5380 struct internal_syment isym;
5381 union internal_auxent aux;
5383 output_bfd = finfo->output_bfd;
5385 /* If this symbol was garbage collected, just skip it. */
5386 if (xcoff_hash_table (finfo->info)->gc
5387 && (h->flags & XCOFF_MARK) == 0)
5390 /* If we need a .loader section entry, write it out. */
5391 if (h->ldsym != NULL)
5393 struct internal_ldsym *ldsym;
5398 if (h->root.type == bfd_link_hash_undefined
5399 || h->root.type == bfd_link_hash_undefweak)
5402 ldsym->l_scnum = N_UNDEF;
5403 ldsym->l_smtype = XTY_ER;
5404 impbfd = h->root.u.undef.abfd;
5406 else if (h->root.type == bfd_link_hash_defined
5407 || h->root.type == bfd_link_hash_defweak)
5411 sec = h->root.u.def.section;
5412 ldsym->l_value = (sec->output_section->vma
5413 + sec->output_offset
5414 + h->root.u.def.value);
5415 ldsym->l_scnum = sec->output_section->target_index;
5416 ldsym->l_smtype = XTY_SD;
5417 impbfd = sec->owner;
5422 if (((h->flags & XCOFF_DEF_REGULAR) == 0
5423 && (h->flags & XCOFF_DEF_DYNAMIC) != 0)
5424 || (h->flags & XCOFF_IMPORT) != 0)
5425 ldsym->l_smtype |= L_IMPORT;
5426 if (((h->flags & XCOFF_DEF_REGULAR) != 0
5427 && (h->flags & XCOFF_DEF_DYNAMIC) != 0)
5428 || (h->flags & XCOFF_EXPORT) != 0)
5429 ldsym->l_smtype |= L_EXPORT;
5430 if ((h->flags & XCOFF_ENTRY) != 0)
5431 ldsym->l_smtype |= L_ENTRY;
5433 ldsym->l_smclas = h->smclas;
5435 if (ldsym->l_ifile == (bfd_size_type) -1)
5437 else if (ldsym->l_ifile == 0)
5439 if ((ldsym->l_smtype & L_IMPORT) == 0)
5441 else if (impbfd == NULL)
5445 BFD_ASSERT (impbfd->xvec == output_bfd->xvec);
5446 ldsym->l_ifile = xcoff_data (impbfd)->import_file_id;
5452 BFD_ASSERT (h->ldindx >= 0);
5453 BFD_ASSERT (LDSYMSZ == sizeof (struct external_ldsym));
5454 xcoff_swap_ldsym_out (output_bfd, ldsym, finfo->ldsym + h->ldindx - 3);
5458 /* If this symbol needs global linkage code, write it out. */
5459 if (h->root.type == bfd_link_hash_defined
5460 && (h->root.u.def.section
5461 == xcoff_hash_table (finfo->info)->linkage_section))
5467 p = h->root.u.def.section->contents + h->root.u.def.value;
5469 /* The first instruction in the global linkage code loads a
5470 specific TOC element. */
5471 tocoff = (h->descriptor->toc_section->output_section->vma
5472 + h->descriptor->toc_section->output_offset
5473 - xcoff_data (output_bfd)->toc);
5474 if ((h->descriptor->flags & XCOFF_SET_TOC) != 0)
5475 tocoff += h->descriptor->u.toc_offset;
5476 bfd_put_32 (output_bfd, XCOFF_GLINK_FIRST | (tocoff & 0xffff), p);
5478 i < sizeof xcoff_glink_code / sizeof xcoff_glink_code[0];
5480 bfd_put_32 (output_bfd, xcoff_glink_code[i], p);
5483 /* If we created a TOC entry for this symbol, write out the required
5485 if ((h->flags & XCOFF_SET_TOC) != 0)
5490 struct internal_reloc *irel;
5491 struct internal_ldrel ldrel;
5493 tocsec = h->toc_section;
5494 osec = tocsec->output_section;
5495 oindx = osec->target_index;
5496 irel = finfo->section_info[oindx].relocs + osec->reloc_count;
5497 irel->r_vaddr = (osec->vma
5498 + tocsec->output_offset
5501 irel->r_symndx = h->indx;
5505 irel->r_symndx = obj_raw_syment_count (output_bfd);
5507 irel->r_type = R_POS;
5509 finfo->section_info[oindx].rel_hashes[osec->reloc_count] = NULL;
5510 ++osec->reloc_count;
5512 BFD_ASSERT (h->ldindx >= 0);
5513 ldrel.l_vaddr = irel->r_vaddr;
5514 ldrel.l_symndx = h->ldindx;
5515 ldrel.l_rtype = (31 << 8) | R_POS;
5516 ldrel.l_rsecnm = oindx;
5517 xcoff_swap_ldrel_out (output_bfd, &ldrel, finfo->ldrel);
5521 /* If this symbol is a specially defined function descriptor, write
5522 it out. The first word is the address of the function code
5523 itself, the second word is the address of the TOC, and the third
5525 if ((h->flags & XCOFF_DESCRIPTOR) != 0
5526 && h->root.type == bfd_link_hash_defined
5527 && (h->root.u.def.section
5528 == xcoff_hash_table (finfo->info)->descriptor_section))
5534 struct xcoff_link_hash_entry *hentry;
5536 struct internal_reloc *irel;
5537 struct internal_ldrel ldrel;
5540 sec = h->root.u.def.section;
5541 osec = sec->output_section;
5542 oindx = osec->target_index;
5543 p = sec->contents + h->root.u.def.value;
5545 hentry = h->descriptor;
5546 BFD_ASSERT (hentry != NULL
5547 && (hentry->root.type == bfd_link_hash_defined
5548 || hentry->root.type == bfd_link_hash_defweak));
5549 esec = hentry->root.u.def.section;
5550 bfd_put_32 (output_bfd,
5551 (esec->output_section->vma
5552 + esec->output_offset
5553 + hentry->root.u.def.value),
5556 irel = finfo->section_info[oindx].relocs + osec->reloc_count;
5557 irel->r_vaddr = (osec->vma
5558 + sec->output_offset
5559 + h->root.u.def.value);
5560 irel->r_symndx = esec->output_section->target_index;
5561 irel->r_type = R_POS;
5563 finfo->section_info[oindx].rel_hashes[osec->reloc_count] = NULL;
5564 ++osec->reloc_count;
5566 ldrel.l_vaddr = irel->r_vaddr;
5567 if (strcmp (esec->output_section->name, ".text") == 0)
5569 else if (strcmp (esec->output_section->name, ".data") == 0)
5571 else if (strcmp (esec->output_section->name, ".bss") == 0)
5575 (*_bfd_error_handler)
5576 ("%s: loader reloc in unrecognized section `%s'",
5577 bfd_get_filename (output_bfd),
5578 esec->output_section->name);
5579 bfd_set_error (bfd_error_nonrepresentable_section);
5582 ldrel.l_rtype = (31 << 8) | R_POS;
5583 ldrel.l_rsecnm = oindx;
5584 xcoff_swap_ldrel_out (output_bfd, &ldrel, finfo->ldrel);
5587 bfd_put_32 (output_bfd, xcoff_data (output_bfd)->toc, p + 4);
5589 tsec = coff_section_from_bfd_index (output_bfd,
5590 xcoff_data (output_bfd)->sntoc);
5593 irel->r_vaddr = (osec->vma
5594 + sec->output_offset
5595 + h->root.u.def.value
5597 irel->r_symndx = tsec->output_section->target_index;
5598 irel->r_type = R_POS;
5600 finfo->section_info[oindx].rel_hashes[osec->reloc_count] = NULL;
5601 ++osec->reloc_count;
5603 ldrel.l_vaddr = irel->r_vaddr;
5604 if (strcmp (tsec->output_section->name, ".text") == 0)
5606 else if (strcmp (tsec->output_section->name, ".data") == 0)
5608 else if (strcmp (tsec->output_section->name, ".bss") == 0)
5612 (*_bfd_error_handler)
5613 ("%s: loader reloc in unrecognized section `%s'",
5614 bfd_get_filename (output_bfd),
5615 tsec->output_section->name);
5616 bfd_set_error (bfd_error_nonrepresentable_section);
5619 ldrel.l_rtype = (31 << 8) | R_POS;
5620 ldrel.l_rsecnm = oindx;
5621 xcoff_swap_ldrel_out (output_bfd, &ldrel, finfo->ldrel);
5629 && (finfo->info->strip == strip_all
5630 || (finfo->info->strip == strip_some
5631 && (bfd_hash_lookup (finfo->info->keep_hash,
5632 h->root.root.string, false, false)
5637 && (h->flags & (XCOFF_REF_REGULAR | XCOFF_DEF_REGULAR)) == 0)
5640 outsym = finfo->outsyms;
5642 memset (&aux, 0, sizeof aux);
5644 h->indx = obj_raw_syment_count (output_bfd);
5646 if (strlen (h->root.root.string) <= SYMNMLEN)
5647 strncpy (isym._n._n_name, h->root.root.string, SYMNMLEN);
5654 if ((output_bfd->flags & BFD_TRADITIONAL_FORMAT) != 0)
5656 indx = _bfd_stringtab_add (finfo->strtab, h->root.root.string, hash,
5658 if (indx == (bfd_size_type) -1)
5660 isym._n._n_n._n_zeroes = 0;
5661 isym._n._n_n._n_offset = STRING_SIZE_SIZE + indx;
5664 if (h->root.type == bfd_link_hash_undefined
5665 || h->root.type == bfd_link_hash_undefweak)
5668 isym.n_scnum = N_UNDEF;
5669 isym.n_sclass = C_EXT;
5670 aux.x_csect.x_smtyp = XTY_ER;
5672 else if (h->root.type == bfd_link_hash_defined
5673 || h->root.type == bfd_link_hash_defweak)
5675 struct xcoff_link_size_list *l;
5677 isym.n_value = (h->root.u.def.section->output_section->vma
5678 + h->root.u.def.section->output_offset
5679 + h->root.u.def.value);
5680 isym.n_scnum = h->root.u.def.section->output_section->target_index;
5681 isym.n_sclass = C_HIDEXT;
5682 aux.x_csect.x_smtyp = XTY_SD;
5684 if ((h->flags & XCOFF_HAS_SIZE) != 0)
5686 for (l = xcoff_hash_table (finfo->info)->size_list;
5692 aux.x_csect.x_scnlen.l = l->size;
5698 else if (h->root.type == bfd_link_hash_common)
5700 isym.n_value = (h->root.u.c.p->section->output_section->vma
5701 + h->root.u.c.p->section->output_offset);
5702 isym.n_scnum = h->root.u.c.p->section->output_section->target_index;
5703 isym.n_sclass = C_EXT;
5704 aux.x_csect.x_smtyp = XTY_CM;
5705 aux.x_csect.x_scnlen.l = h->root.u.c.size;
5710 isym.n_type = T_NULL;
5713 bfd_coff_swap_sym_out (output_bfd, (PTR) &isym, (PTR) outsym);
5714 outsym += bfd_coff_symesz (output_bfd);
5716 aux.x_csect.x_smclas = h->smclas;
5718 bfd_coff_swap_aux_out (output_bfd, (PTR) &aux, T_NULL, isym.n_sclass, 0, 1,
5720 outsym += bfd_coff_auxesz (output_bfd);
5722 if (h->root.type == bfd_link_hash_defined
5723 || h->root.type == bfd_link_hash_defweak)
5725 /* We just output an SD symbol. Now output an LD symbol. */
5729 isym.n_sclass = C_EXT;
5730 bfd_coff_swap_sym_out (output_bfd, (PTR) &isym, (PTR) outsym);
5731 outsym += bfd_coff_symesz (output_bfd);
5733 aux.x_csect.x_smtyp = XTY_LD;
5734 aux.x_csect.x_scnlen.l = obj_raw_syment_count (output_bfd);
5736 bfd_coff_swap_aux_out (output_bfd, (PTR) &aux, T_NULL, C_EXT, 0, 1,
5738 outsym += bfd_coff_auxesz (output_bfd);
5741 if (bfd_seek (output_bfd,
5742 (obj_sym_filepos (output_bfd)
5743 + (obj_raw_syment_count (output_bfd)
5744 * bfd_coff_symesz (output_bfd))),
5746 || (bfd_write (finfo->outsyms, outsym - finfo->outsyms, 1, output_bfd)
5747 != (bfd_size_type) (outsym - finfo->outsyms)))
5749 obj_raw_syment_count (output_bfd) +=
5750 (outsym - finfo->outsyms) / bfd_coff_symesz (output_bfd);
5755 /* Handle a link order which is supposed to generate a reloc. */
5758 xcoff_reloc_link_order (output_bfd, finfo, output_section, link_order)
5760 struct xcoff_final_link_info *finfo;
5761 asection *output_section;
5762 struct bfd_link_order *link_order;
5764 reloc_howto_type *howto;
5765 struct xcoff_link_hash_entry *h;
5769 struct internal_reloc *irel;
5770 struct xcoff_link_hash_entry **rel_hash_ptr;
5771 struct internal_ldrel ldrel;
5773 if (link_order->type == bfd_section_reloc_link_order)
5775 /* We need to somehow locate a symbol in the right section. The
5776 symbol must either have a value of zero, or we must adjust
5777 the addend by the value of the symbol. FIXME: Write this
5778 when we need it. The old linker couldn't handle this anyhow. */
5782 howto = bfd_reloc_type_lookup (output_bfd, link_order->u.reloc.p->reloc);
5785 bfd_set_error (bfd_error_bad_value);
5789 h = ((struct xcoff_link_hash_entry *)
5790 bfd_wrapped_link_hash_lookup (output_bfd, finfo->info,
5791 link_order->u.reloc.p->u.name,
5792 false, false, true));
5795 if (! ((*finfo->info->callbacks->unattached_reloc)
5796 (finfo->info, link_order->u.reloc.p->u.name, (bfd *) NULL,
5797 (asection *) NULL, (bfd_vma) 0)))
5802 if (h->root.type == bfd_link_hash_common)
5804 hsec = h->root.u.c.p->section;
5807 else if (h->root.type == bfd_link_hash_defined
5808 || h->root.type == bfd_link_hash_defweak)
5810 hsec = h->root.u.def.section;
5811 hval = h->root.u.def.value;
5819 addend = link_order->u.reloc.p->addend;
5821 addend += (hsec->output_section->vma
5822 + hsec->output_offset
5829 bfd_reloc_status_type rstat;
5832 size = bfd_get_reloc_size (howto);
5833 buf = (bfd_byte *) bfd_zmalloc (size);
5837 rstat = _bfd_relocate_contents (howto, output_bfd, addend, buf);
5843 case bfd_reloc_outofrange:
5845 case bfd_reloc_overflow:
5846 if (! ((*finfo->info->callbacks->reloc_overflow)
5847 (finfo->info, link_order->u.reloc.p->u.name,
5848 howto->name, addend, (bfd *) NULL, (asection *) NULL,
5856 ok = bfd_set_section_contents (output_bfd, output_section, (PTR) buf,
5857 (file_ptr) link_order->offset, size);
5863 /* Store the reloc information in the right place. It will get
5864 swapped and written out at the end of the final_link routine. */
5866 irel = (finfo->section_info[output_section->target_index].relocs
5867 + output_section->reloc_count);
5868 rel_hash_ptr = (finfo->section_info[output_section->target_index].rel_hashes
5869 + output_section->reloc_count);
5871 memset (irel, 0, sizeof (struct internal_reloc));
5872 *rel_hash_ptr = NULL;
5874 irel->r_vaddr = output_section->vma + link_order->offset;
5877 irel->r_symndx = h->indx;
5880 /* Set the index to -2 to force this symbol to get written out. */
5886 irel->r_type = howto->type;
5887 irel->r_size = howto->bitsize - 1;
5888 if (howto->complain_on_overflow == complain_overflow_signed)
5889 irel->r_size |= 0x80;
5891 ++output_section->reloc_count;
5893 /* Now output the reloc to the .loader section. */
5895 ldrel.l_vaddr = irel->r_vaddr;
5899 const char *secname;
5901 secname = hsec->output_section->name;
5903 if (strcmp (secname, ".text") == 0)
5905 else if (strcmp (secname, ".data") == 0)
5907 else if (strcmp (secname, ".bss") == 0)
5911 (*_bfd_error_handler)
5912 ("%s: loader reloc in unrecognized section `%s'",
5913 bfd_get_filename (output_bfd), secname);
5914 bfd_set_error (bfd_error_nonrepresentable_section);
5922 (*_bfd_error_handler)
5923 ("%s: `%s' in loader reloc but not loader sym",
5924 bfd_get_filename (output_bfd),
5925 h->root.root.string);
5926 bfd_set_error (bfd_error_bad_value);
5929 ldrel.l_symndx = h->ldindx;
5932 ldrel.l_rtype = (irel->r_size << 8) | irel->r_type;
5933 ldrel.l_rsecnm = output_section->target_index;
5934 xcoff_swap_ldrel_out (output_bfd, &ldrel, finfo->ldrel);
5940 /* Sort relocs by VMA. This is called via qsort. */
5943 xcoff_sort_relocs (p1, p2)
5947 const struct internal_reloc *r1 = (const struct internal_reloc *) p1;
5948 const struct internal_reloc *r2 = (const struct internal_reloc *) p2;
5950 if (r1->r_vaddr > r2->r_vaddr)
5952 else if (r1->r_vaddr < r2->r_vaddr)
5958 /* This is the relocation function for the RS/6000/POWER/PowerPC.
5959 This is currently the only processor which uses XCOFF; I hope that
5960 will never change. */
5963 _bfd_ppc_xcoff_relocate_section (output_bfd, info, input_bfd,
5964 input_section, contents, relocs, syms,
5967 struct bfd_link_info *info;
5969 asection *input_section;
5971 struct internal_reloc *relocs;
5972 struct internal_syment *syms;
5973 asection **sections;
5975 struct internal_reloc *rel;
5976 struct internal_reloc *relend;
5979 relend = rel + input_section->reloc_count;
5980 for (; rel < relend; rel++)
5983 struct xcoff_link_hash_entry *h;
5984 struct internal_syment *sym;
5987 struct reloc_howto_struct howto;
5988 bfd_reloc_status_type rstat;
5990 /* Relocation type R_REF is a special relocation type which is
5991 merely used to prevent garbage collection from occurring for
5992 the csect including the symbol which it references. */
5993 if (rel->r_type == R_REF)
5996 symndx = rel->r_symndx;
6006 h = obj_xcoff_sym_hashes (input_bfd)[symndx];
6007 sym = syms + symndx;
6008 addend = - sym->n_value;
6011 /* We build the howto information on the fly. */
6013 howto.type = rel->r_type;
6014 howto.rightshift = 0;
6016 howto.bitsize = (rel->r_size & 0x1f) + 1;
6017 howto.pc_relative = false;
6019 if ((rel->r_size & 0x80) != 0)
6020 howto.complain_on_overflow = complain_overflow_signed;
6022 howto.complain_on_overflow = complain_overflow_bitfield;
6023 howto.special_function = NULL;
6024 howto.name = "internal";
6025 howto.partial_inplace = true;
6026 if (howto.bitsize == 32)
6027 howto.src_mask = howto.dst_mask = 0xffffffff;
6030 howto.src_mask = howto.dst_mask = (1 << howto.bitsize) - 1;
6031 if (howto.bitsize == 16)
6034 howto.pcrel_offset = false;
6044 sec = bfd_abs_section_ptr;
6049 sec = sections[symndx];
6050 /* Hack to make sure we use the right TOC anchor value
6051 if this reloc is against the TOC anchor. */
6052 if (sec->name[3] == '0'
6053 && strcmp (sec->name, ".tc0") == 0)
6054 val = xcoff_data (output_bfd)->toc;
6056 val = (sec->output_section->vma
6057 + sec->output_offset
6064 if (h->root.type == bfd_link_hash_defined
6065 || h->root.type == bfd_link_hash_defweak)
6069 sec = h->root.u.def.section;
6070 val = (h->root.u.def.value
6071 + sec->output_section->vma
6072 + sec->output_offset);
6074 else if (h->root.type == bfd_link_hash_common)
6078 sec = h->root.u.c.p->section;
6079 val = (sec->output_section->vma
6080 + sec->output_offset);
6082 else if ((h->flags & XCOFF_DEF_DYNAMIC) != 0
6083 || (h->flags & XCOFF_IMPORT) != 0)
6085 /* Every symbol in a shared object is defined somewhere. */
6088 else if (! info->relocateable)
6090 if (! ((*info->callbacks->undefined_symbol)
6091 (info, h->root.root.string, input_bfd, input_section,
6092 rel->r_vaddr - input_section->vma)))
6097 /* I took the relocation type definitions from two documents:
6098 the PowerPC AIX Version 4 Application Binary Interface, First
6099 Edition (April 1992), and the PowerOpen ABI, Big-Endian
6100 32-Bit Hardware Implementation (June 30, 1994). Differences
6101 between the documents are noted below. */
6103 switch (rel->r_type)
6108 /* These relocs are defined by the PowerPC ABI to be
6109 relative branches which use half of the difference
6110 between the symbol and the program counter. I can't
6111 quite figure out when this is useful. These relocs are
6112 not defined by the PowerOpen ABI. */
6114 (*_bfd_error_handler)
6115 ("%s: unsupported relocation type 0x%02x",
6116 bfd_get_filename (input_bfd), (unsigned int) rel->r_type);
6117 bfd_set_error (bfd_error_bad_value);
6120 /* Simple positive relocation. */
6123 /* Simple negative relocation. */
6127 /* Simple PC relative relocation. */
6128 howto.pc_relative = true;
6131 /* TOC relative relocation. The value in the instruction in
6132 the input file is the offset from the input file TOC to
6133 the desired location. We want the offset from the final
6134 TOC to the desired location. We have:
6139 so we must change insn by on - in.
6142 /* Global linkage relocation. The value of this relocation
6143 is the address of the entry in the TOC section. */
6145 /* Local object TOC address. I can't figure out the
6146 difference between this and case R_GL. */
6148 /* TOC relative relocation. A TOC relative load instruction
6149 which may be changed to a load address instruction.
6150 FIXME: We don't currently implement this optimization. */
6152 /* TOC relative relocation. This is a TOC relative load
6153 address instruction which may be changed to a load
6154 instruction. FIXME: I don't know if this is the correct
6156 if (h != NULL && h->smclas != XMC_TD)
6158 if (h->toc_section == NULL)
6160 (*_bfd_error_handler)
6161 ("%s: TOC reloc at 0x%x to symbol `%s' with no TOC entry",
6162 bfd_get_filename (input_bfd), rel->r_vaddr,
6163 h->root.root.string);
6164 bfd_set_error (bfd_error_bad_value);
6168 BFD_ASSERT ((h->flags & XCOFF_SET_TOC) == 0);
6169 val = (h->toc_section->output_section->vma
6170 + h->toc_section->output_offset);
6173 val = ((val - xcoff_data (output_bfd)->toc)
6174 - (sym->n_value - xcoff_data (input_bfd)->toc));
6178 /* Absolute branch. We don't want to mess with the lower
6179 two bits of the instruction. */
6181 /* The PowerPC ABI defines this as an absolute call which
6182 may be modified to become a relative call. The PowerOpen
6183 ABI does not define this relocation type. */
6185 /* Absolute branch which may be modified to become a
6188 /* The PowerPC ABI defines this as an absolute branch to a
6189 fixed address which may be modified to an absolute branch
6190 to a symbol. The PowerOpen ABI does not define this
6193 /* The PowerPC ABI defines this as an absolute branch to a
6194 fixed address which may be modified to a relative branch.
6195 The PowerOpen ABI does not define this relocation type. */
6196 howto.src_mask &= ~3;
6197 howto.dst_mask = howto.src_mask;
6200 /* Relative branch. We don't want to mess with the lower
6201 two bits of the instruction. */
6203 /* The PowerPC ABI defines this as a relative call which may
6204 be modified to become an absolute call. The PowerOpen
6205 ABI does not define this relocation type. */
6207 /* A relative branch which may be modified to become an
6208 absolute branch. FIXME: We don't implement this,
6209 although we should for symbols of storage mapping class
6211 howto.pc_relative = true;
6212 howto.src_mask &= ~3;
6213 howto.dst_mask = howto.src_mask;
6216 /* The PowerPC AIX ABI describes this as a load which may be
6217 changed to a load address. The PowerOpen ABI says this
6218 is the same as case R_POS. */
6221 /* The PowerPC AIX ABI describes this as a load address
6222 which may be changed to a load. The PowerOpen ABI says
6223 this is the same as R_POS. */
6227 /* If we see an R_BR or R_RBR reloc which is jumping to global
6228 linkage code, and it is followed by an appropriate cror nop
6229 instruction, we replace the cror with lwz r2,20(r1). This
6230 restores the TOC after the glink code. Contrariwise, if the
6231 call is followed by a lwz r2,20(r1), but the call is not
6232 going to global linkage code, we can replace the load with a
6234 if ((rel->r_type == R_BR || rel->r_type == R_RBR)
6236 && h->root.type == bfd_link_hash_defined
6237 && (rel->r_vaddr - input_section->vma + 8
6238 <= input_section->_cooked_size))
6243 pnext = contents + (rel->r_vaddr - input_section->vma) + 4;
6244 next = bfd_get_32 (input_bfd, pnext);
6246 /* The _ptrgl function is magic. It is used by the AIX
6247 compiler to call a function through a pointer. */
6248 if (h->smclas == XMC_GL
6249 || strcmp (h->root.root.string, "._ptrgl") == 0)
6251 if (next == 0x4def7b82 /* cror 15,15,15 */
6252 || next == 0x4ffffb82) /* cror 31,31,31 */
6253 bfd_put_32 (input_bfd, 0x80410014, pnext); /* lwz r1,20(r1) */
6257 if (next == 0x80410014) /* lwz r1,20(r1) */
6258 bfd_put_32 (input_bfd, 0x4ffffb82, pnext); /* cror 31,31,31 */
6262 /* A PC relative reloc includes the section address. */
6263 if (howto.pc_relative)
6264 addend += input_section->vma;
6266 rstat = _bfd_final_link_relocate (&howto, input_bfd, input_section,
6268 rel->r_vaddr - input_section->vma,
6277 case bfd_reloc_overflow:
6280 char buf[SYMNMLEN + 1];
6281 char howto_name[10];
6286 name = h->root.root.string;
6289 name = _bfd_coff_internal_syment_name (input_bfd, sym, buf);
6293 sprintf (howto_name, "0x%02x", rel->r_type);
6295 if (! ((*info->callbacks->reloc_overflow)
6296 (info, name, howto_name, (bfd_vma) 0, input_bfd,
6297 input_section, rel->r_vaddr - input_section->vma)))