1 /* Support for the generic parts of COFF, for BFD.
2 Copyright 1990, 1991, 1992, 1993, 1994 Free Software Foundation, Inc.
3 Written by 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., 675 Mass Ave, Cambridge, MA 02139, USA. */
24 /* This file contains COFF code that is not dependent on any
25 particular COFF target. There is only one version of this file in
26 libbfd.a, so no target specific code may be put in here. Or, to
29 ********** DO NOT PUT TARGET SPECIFIC CODE IN THIS FILE **********
31 If you need to add some target specific behaviour, add a new hook
32 function to bfd_coff_backend_data.
34 Some of these functions are also called by the ECOFF routines.
35 Those functions may not use any COFF specific information, such as
41 #include "coff/internal.h"
44 static boolean coff_write_symbol PARAMS ((bfd *, asymbol *,
45 combined_entry_type *,
47 static boolean coff_write_alien_symbol PARAMS ((bfd *, asymbol *,
49 static boolean coff_write_native_symbol PARAMS ((bfd *, coff_symbol_type *,
52 static asection bfd_debug_section = { "*DEBUG*" };
54 #define STRING_SIZE_SIZE (4)
56 /* Take a section header read from a coff file (in HOST byte order),
57 and make a BFD "section" out of it. This is used by ECOFF. */
59 make_a_section_from_file (abfd, hdr, target_index)
61 struct internal_scnhdr *hdr;
62 unsigned int target_index;
64 asection *return_section;
67 /* Assorted wastage to null-terminate the name, thanks AT&T! */
68 name = bfd_alloc(abfd, sizeof (hdr->s_name)+1);
70 bfd_set_error (bfd_error_no_memory);
73 strncpy(name, (char *) &hdr->s_name[0], sizeof (hdr->s_name));
74 name[sizeof (hdr->s_name)] = 0;
76 return_section = bfd_make_section(abfd, name);
77 if (return_section == NULL)
78 return_section = bfd_coff_make_section_hook (abfd, name);
80 /* Handle several sections of the same name. For example, if an executable
81 has two .bss sections, GDB better be able to find both of them
83 if (return_section == NULL)
84 return_section = bfd_make_section_anyway (abfd, name);
86 if (return_section == NULL)
89 /* s_paddr is presumed to be = to s_vaddr */
91 return_section->vma = hdr->s_vaddr;
92 return_section->_raw_size = hdr->s_size;
93 return_section->filepos = hdr->s_scnptr;
94 return_section->rel_filepos = hdr->s_relptr;
95 return_section->reloc_count = hdr->s_nreloc;
97 bfd_coff_set_alignment_hook (abfd, return_section, hdr);
99 return_section->line_filepos = hdr->s_lnnoptr;
101 return_section->lineno_count = hdr->s_nlnno;
102 return_section->userdata = NULL;
103 return_section->next = (asection *) NULL;
104 return_section->flags = bfd_coff_styp_to_sec_flags_hook (abfd, hdr, name);
106 return_section->target_index = target_index;
108 /* At least on i386-coff, the line number count for a shared library
109 section must be ignored. */
110 if ((return_section->flags & SEC_COFF_SHARED_LIBRARY) != 0)
111 return_section->lineno_count = 0;
113 if (hdr->s_nreloc != 0)
114 return_section->flags |= SEC_RELOC;
115 /* FIXME: should this check 'hdr->s_size > 0' */
116 if (hdr->s_scnptr != 0)
117 return_section->flags |= SEC_HAS_CONTENTS;
121 /* Read in a COFF object and make it into a BFD. This is used by
124 static const bfd_target *
125 coff_real_object_p (abfd, nscns, internal_f, internal_a)
128 struct internal_filehdr *internal_f;
129 struct internal_aouthdr *internal_a;
132 size_t readsize; /* length of file_info */
134 char *external_sections;
136 /* Build a play area */
137 tdata = bfd_coff_mkobject_hook (abfd, (PTR) internal_f, (PTR) internal_a);
141 scnhsz = bfd_coff_scnhsz (abfd);
142 readsize = nscns * scnhsz;
143 external_sections = (char *)bfd_alloc(abfd, readsize);
144 if (!external_sections)
146 bfd_set_error (bfd_error_no_memory);
150 if (bfd_read((PTR)external_sections, 1, readsize, abfd) != readsize) {
154 /* Now copy data as required; construct all asections etc */
157 for (i = 0; i < nscns; i++) {
158 struct internal_scnhdr tmp;
159 bfd_coff_swap_scnhdr_in(abfd, (PTR) (external_sections + i * scnhsz),
161 make_a_section_from_file(abfd,&tmp, i+1);
165 /* make_abs_section(abfd);*/
167 if (bfd_coff_set_arch_mach_hook (abfd, (PTR) internal_f) == false)
170 if (!(internal_f->f_flags & F_RELFLG))
171 abfd->flags |= HAS_RELOC;
172 if ((internal_f->f_flags & F_EXEC))
173 abfd->flags |= EXEC_P;
174 if (!(internal_f->f_flags & F_LNNO))
175 abfd->flags |= HAS_LINENO;
176 if (!(internal_f->f_flags & F_LSYMS))
177 abfd->flags |= HAS_LOCALS;
179 /* FIXME: How can we set D_PAGED correctly? */
180 if ((internal_f->f_flags & F_EXEC) != 0)
181 abfd->flags |= D_PAGED;
183 bfd_get_symcount(abfd) = internal_f->f_nsyms;
184 if (internal_f->f_nsyms)
185 abfd->flags |= HAS_SYMS;
187 if (internal_a != (struct internal_aouthdr *) NULL)
188 bfd_get_start_address (abfd) = internal_a->entry;
190 bfd_get_start_address (abfd) = 0;
194 bfd_release(abfd, tdata);
195 return (const bfd_target *)NULL;
198 /* Turn a COFF file into a BFD, but fail with bfd_error_wrong_format if it is
199 not a COFF file. This is also used by ECOFF. */
209 struct internal_filehdr internal_f;
210 struct internal_aouthdr internal_a;
212 /* figure out how much to read */
213 filhsz = bfd_coff_filhsz (abfd);
214 aoutsz = bfd_coff_aoutsz (abfd);
216 filehdr = bfd_alloc (abfd, filhsz);
219 if (bfd_read(filehdr, 1, filhsz, abfd) != filhsz)
221 if (bfd_get_error () != bfd_error_system_call)
222 bfd_set_error (bfd_error_wrong_format);
225 bfd_coff_swap_filehdr_in(abfd, filehdr, &internal_f);
226 bfd_release (abfd, filehdr);
228 if (bfd_coff_bad_format_hook (abfd, &internal_f) == false) {
229 bfd_set_error (bfd_error_wrong_format);
232 nscns =internal_f.f_nscns;
234 if (internal_f.f_opthdr) {
237 opthdr = bfd_alloc (abfd, aoutsz);
240 if (bfd_read(opthdr, 1,aoutsz, abfd) != aoutsz) {
243 bfd_coff_swap_aouthdr_in(abfd, opthdr, (PTR)&internal_a);
246 /* Seek past the opt hdr stuff */
247 if (bfd_seek(abfd, (file_ptr) (internal_f.f_opthdr + filhsz), SEEK_SET)
251 return coff_real_object_p(abfd, nscns, &internal_f,
252 (internal_f.f_opthdr != 0
254 : (struct internal_aouthdr *) NULL));
257 /* Get the BFD section from a COFF symbol section number. */
260 coff_section_from_bfd_index (abfd, index)
264 struct sec *answer = abfd->sections;
268 return bfd_abs_section_ptr;
270 if (index == N_UNDEF)
272 return bfd_und_section_ptr;
276 return &bfd_debug_section;
281 if (answer->target_index == index)
283 answer = answer->next;
286 /* We should not reach this point, but the SCO 3.2v4 /lib/libc_s.a
287 has a bad symbol table in biglitpow.o. */
288 return bfd_und_section_ptr;
291 /* Get the upper bound of a COFF symbol table. */
294 coff_get_symtab_upper_bound(abfd)
297 if (!bfd_coff_slurp_symbol_table(abfd))
300 return (bfd_get_symcount(abfd) + 1) * (sizeof(coff_symbol_type *));
304 /* Canonicalize a COFF symbol table. */
307 coff_get_symtab (abfd, alocation)
311 unsigned int counter;
312 coff_symbol_type *symbase;
313 coff_symbol_type **location = (coff_symbol_type **) alocation;
315 if (! bfd_coff_slurp_symbol_table (abfd))
318 symbase = obj_symbols (abfd);
319 counter = bfd_get_symcount (abfd);
320 while (counter-- > 0)
321 *location++ = symbase++;
325 return bfd_get_symcount (abfd);
328 /* Set lineno_count for the output sections of a COFF file. */
331 coff_count_linenumbers (abfd)
334 unsigned int limit = bfd_get_symcount(abfd);
342 /* This may be from the backend linker, in which case the
343 lineno_count in the sections is correct. */
344 for (s = abfd->sections; s != NULL; s = s->next)
345 total += s->lineno_count;
349 for (s = abfd->sections; s != NULL; s = s->next)
350 BFD_ASSERT (s->lineno_count == 0);
352 for (p = abfd->outsymbols, i = 0; i < limit; i++, p++)
354 asymbol *q_maybe = *p;
356 if (bfd_asymbol_flavour (q_maybe) == bfd_target_coff_flavour)
358 coff_symbol_type *q = coffsymbol (q_maybe);
360 if (q->lineno != NULL)
362 /* This symbol has line numbers. Increment the owning
363 section's linenumber count. */
364 alent *l = q->lineno;
366 ++q->symbol.section->output_section->lineno_count;
369 while (l->line_number != 0)
372 ++q->symbol.section->output_section->lineno_count;
382 /* Takes a bfd and a symbol, returns a pointer to the coff specific
383 area of the symbol if there is one. */
387 coff_symbol_from (ignore_abfd, symbol)
391 if (bfd_asymbol_flavour(symbol) != bfd_target_coff_flavour)
392 return (coff_symbol_type *)NULL;
394 if (bfd_asymbol_bfd(symbol)->tdata.coff_obj_data == (coff_data_type*)NULL)
395 return (coff_symbol_type *)NULL;
397 return (coff_symbol_type *) symbol;
401 fixup_symbol_value (coff_symbol_ptr, syment)
402 coff_symbol_type *coff_symbol_ptr;
403 struct internal_syment *syment;
406 /* Normalize the symbol flags */
407 if (bfd_is_com_section (coff_symbol_ptr->symbol.section)) {
408 /* a common symbol is undefined with a value */
409 syment->n_scnum = N_UNDEF;
410 syment->n_value = coff_symbol_ptr->symbol.value;
412 else if (coff_symbol_ptr->symbol.flags & BSF_DEBUGGING) {
413 syment->n_value = coff_symbol_ptr->symbol.value;
415 else if (bfd_is_und_section (coff_symbol_ptr->symbol.section)) {
416 syment->n_scnum = N_UNDEF;
420 if (coff_symbol_ptr->symbol.section) {
422 coff_symbol_ptr->symbol.section->output_section->target_index;
425 coff_symbol_ptr->symbol.value +
426 coff_symbol_ptr->symbol.section->output_offset +
427 coff_symbol_ptr->symbol.section->output_section->vma;
432 syment->n_scnum = N_ABS;
433 syment->n_value = coff_symbol_ptr->symbol.value;
438 /* run through all the symbols in the symbol table and work out what
439 their indexes into the symbol table will be when output
441 Coff requires that each C_FILE symbol points to the next one in the
442 chain, and that the last one points to the first external symbol. We
447 coff_renumber_symbols (bfd_ptr)
450 unsigned int symbol_count = bfd_get_symcount(bfd_ptr);
451 asymbol **symbol_ptr_ptr = bfd_ptr->outsymbols;
452 unsigned int native_index = 0;
453 struct internal_syment *last_file = (struct internal_syment *)NULL;
454 unsigned int symbol_index;
456 /* COFF demands that undefined symbols come after all other symbols.
457 Since we don't need to impose this extra knowledge on all our client
458 programs, deal with that here. Sort the symbol table; just move the
459 undefined symbols to the end, leaving the rest alone. */
460 /* @@ Do we have some condition we could test for, so we don't always
461 have to do this? I don't think relocatability is quite right, but
462 I'm not certain. [raeburn:19920508.1711EST] */
467 newsyms = (asymbol **) bfd_alloc_by_size_t (bfd_ptr,
469 * (symbol_count + 1));
472 bfd_set_error (bfd_error_no_memory);
475 bfd_ptr->outsymbols = newsyms;
476 for (i = 0; i < symbol_count; i++)
477 if (! bfd_is_und_section (symbol_ptr_ptr[i]->section))
478 *newsyms++ = symbol_ptr_ptr[i];
479 for (i = 0; i < symbol_count; i++)
480 if (bfd_is_und_section (symbol_ptr_ptr[i]->section))
481 *newsyms++ = symbol_ptr_ptr[i];
482 *newsyms = (asymbol *) NULL;
483 symbol_ptr_ptr = bfd_ptr->outsymbols;
486 for (symbol_index = 0; symbol_index < symbol_count; symbol_index++)
488 coff_symbol_type *coff_symbol_ptr = coff_symbol_from(bfd_ptr, symbol_ptr_ptr[symbol_index]);
489 if (coff_symbol_ptr && coff_symbol_ptr->native) {
490 combined_entry_type *s = coff_symbol_ptr->native;
493 if (s->u.syment.n_sclass == C_FILE)
495 if (last_file != (struct internal_syment *)NULL) {
496 last_file->n_value = native_index;
498 last_file = &(s->u.syment);
502 /* Modify the symbol values according to their section and
505 fixup_symbol_value(coff_symbol_ptr, &(s->u.syment));
507 for (i = 0; i < s->u.syment.n_numaux + 1; i++) {
508 s[i].offset = native_index ++;
515 obj_conv_table_size (bfd_ptr) = native_index;
520 Run thorough the symbol table again, and fix it so that all pointers to
521 entries are changed to the entries' index in the output symbol table.
525 coff_mangle_symbols (bfd_ptr)
528 unsigned int symbol_count = bfd_get_symcount (bfd_ptr);
529 asymbol **symbol_ptr_ptr = bfd_ptr->outsymbols;
530 unsigned int symbol_index;
532 for (symbol_index = 0; symbol_index < symbol_count; symbol_index++)
534 coff_symbol_type *coff_symbol_ptr =
535 coff_symbol_from (bfd_ptr, symbol_ptr_ptr[symbol_index]);
537 if (coff_symbol_ptr && coff_symbol_ptr->native)
540 combined_entry_type *s = coff_symbol_ptr->native;
544 /* FIXME: We should use a union here. */
545 s->u.syment.n_value =
546 ((combined_entry_type *) s->u.syment.n_value)->offset;
549 for (i = 0; i < s->u.syment.n_numaux ; i++)
551 combined_entry_type *a = s + i + 1;
554 a->u.auxent.x_sym.x_tagndx.l =
555 a->u.auxent.x_sym.x_tagndx.p->offset;
560 a->u.auxent.x_sym.x_fcnary.x_fcn.x_endndx.l =
561 a->u.auxent.x_sym.x_fcnary.x_fcn.x_endndx.p->offset;
566 a->u.auxent.x_csect.x_scnlen.l =
567 a->u.auxent.x_csect.x_scnlen.p->offset;
575 static bfd_size_type string_size;
576 static bfd_size_type debug_string_size;
577 static asection *debug_string_section;
580 coff_fix_symbol_name (abfd, symbol, native)
583 combined_entry_type *native;
585 unsigned int name_length;
586 union internal_auxent *auxent;
587 char * name = ( char *)(symbol->name);
589 if (name == (char *) NULL) {
590 /* coff symbols always have names, so we'll make one up */
591 symbol->name = "strange";
592 name = (char *)symbol->name;
594 name_length = strlen(name);
596 if (native->u.syment.n_sclass == C_FILE) {
597 strncpy(native->u.syment._n._n_name, ".file", SYMNMLEN);
598 auxent = &(native+1)->u.auxent;
600 if (bfd_coff_long_filenames (abfd)) {
601 if (name_length <= FILNMLEN) {
602 strncpy(auxent->x_file.x_fname, name, FILNMLEN);
605 auxent->x_file.x_n.x_offset = string_size + STRING_SIZE_SIZE;
606 auxent->x_file.x_n.x_zeroes = 0;
607 string_size += name_length + 1;
611 strncpy(auxent->x_file.x_fname, name, FILNMLEN);
612 if (name_length > FILNMLEN) {
613 name[FILNMLEN] = '\0';
618 { /* NOT A C_FILE SYMBOL */
619 if (name_length <= SYMNMLEN)
621 /* This name will fit into the symbol neatly */
622 strncpy(native->u.syment._n._n_name, symbol->name, SYMNMLEN);
624 else if (! bfd_coff_symname_in_debug (abfd, &native->u.syment))
626 native->u.syment._n._n_n._n_offset = string_size + STRING_SIZE_SIZE;
627 native->u.syment._n._n_n._n_zeroes = 0;
628 string_size += name_length + 1;
635 /* This name should be written into the .debug section. For
636 some reason each name is preceded by a two byte length
637 and also followed by a null byte. FIXME: We assume that
638 the .debug section has already been created, and that it
640 if (debug_string_section == (asection *) NULL)
641 debug_string_section = bfd_get_section_by_name (abfd, ".debug");
642 filepos = bfd_tell (abfd);
643 bfd_put_16 (abfd, name_length + 1, buf);
644 if (! bfd_set_section_contents (abfd,
645 debug_string_section,
647 (file_ptr) debug_string_size,
649 || ! bfd_set_section_contents (abfd,
650 debug_string_section,
652 (file_ptr) debug_string_size + 2,
653 (bfd_size_type) name_length + 1))
655 if (bfd_seek (abfd, filepos, SEEK_SET) != 0)
657 native->u.syment._n._n_n._n_offset = debug_string_size + 2;
658 native->u.syment._n._n_n._n_zeroes = 0;
659 debug_string_size += name_length + 3;
664 /* We need to keep track of the symbol index so that when we write out
665 the relocs we can get the index for a symbol. This method is a
668 #define set_index(symbol, idx) ((symbol)->udata.i = (idx))
670 /* Write a symbol out to a COFF file. */
673 coff_write_symbol (abfd, symbol, native, written)
676 combined_entry_type *native;
677 unsigned int *written;
679 unsigned int numaux = native->u.syment.n_numaux;
680 int type = native->u.syment.n_type;
681 int class = native->u.syment.n_sclass;
683 bfd_size_type symesz;
685 /* @@ bfd_debug_section isn't accessible outside this file, but we
686 know that C_FILE symbols belong there. So move them. */
687 if (native->u.syment.n_sclass == C_FILE)
688 symbol->section = &bfd_debug_section;
690 if (bfd_is_abs_section (symbol->section))
692 native->u.syment.n_scnum = N_ABS;
694 else if (symbol->section == &bfd_debug_section)
696 native->u.syment.n_scnum = N_DEBUG;
698 else if (bfd_is_und_section (symbol->section))
700 native->u.syment.n_scnum = N_UNDEF;
704 native->u.syment.n_scnum =
705 symbol->section->output_section->target_index;
708 coff_fix_symbol_name (abfd, symbol, native);
710 symesz = bfd_coff_symesz (abfd);
711 buf = bfd_alloc (abfd, symesz);
714 bfd_set_error (bfd_error_no_memory);
717 bfd_coff_swap_sym_out (abfd, &native->u.syment, buf);
718 if (bfd_write (buf, 1, symesz, abfd) != symesz)
720 bfd_release (abfd, buf);
722 if (native->u.syment.n_numaux > 0)
724 bfd_size_type auxesz;
727 auxesz = bfd_coff_auxesz (abfd);
728 buf = bfd_alloc (abfd, auxesz);
731 bfd_set_error (bfd_error_no_memory);
734 for (j = 0; j < native->u.syment.n_numaux; j++)
736 bfd_coff_swap_aux_out (abfd,
737 &((native + j + 1)->u.auxent),
741 native->u.syment.n_numaux,
743 if (bfd_write (buf, 1, auxesz, abfd)!= auxesz)
746 bfd_release (abfd, buf);
749 /* Store the index for use when we write out the relocs. */
750 set_index (symbol, *written);
752 *written += numaux + 1;
756 /* Write out a symbol to a COFF file that does not come from a COFF
757 file originally. This symbol may have been created by the linker,
758 or we may be linking a non COFF file to a COFF file. */
761 coff_write_alien_symbol (abfd, symbol, written)
764 unsigned int *written;
766 combined_entry_type *native;
767 combined_entry_type dummy;
770 native->u.syment.n_type = T_NULL;
771 native->u.syment.n_flags = 0;
772 if (bfd_is_und_section (symbol->section))
774 native->u.syment.n_scnum = N_UNDEF;
775 native->u.syment.n_value = symbol->value;
777 else if (bfd_is_com_section (symbol->section))
779 native->u.syment.n_scnum = N_UNDEF;
780 native->u.syment.n_value = symbol->value;
782 else if (symbol->flags & BSF_DEBUGGING)
784 /* There isn't much point to writing out a debugging symbol
785 unless we are prepared to convert it into COFF debugging
786 format. So, we just ignore them. We must clobber the symbol
787 name to keep it from being put in the string table. */
793 native->u.syment.n_scnum =
794 symbol->section->output_section->target_index;
795 native->u.syment.n_value = (symbol->value
796 + symbol->section->output_section->vma
797 + symbol->section->output_offset);
799 /* Copy the any flags from the the file header into the symbol.
802 coff_symbol_type *c = coff_symbol_from (abfd, symbol);
803 if (c != (coff_symbol_type *) NULL)
804 native->u.syment.n_flags = bfd_asymbol_bfd (&c->symbol)->flags;
808 native->u.syment.n_type = 0;
809 if (symbol->flags & BSF_LOCAL)
810 native->u.syment.n_sclass = C_STAT;
812 native->u.syment.n_sclass = C_EXT;
813 native->u.syment.n_numaux = 0;
815 return coff_write_symbol (abfd, symbol, native, written);
818 /* Write a native symbol to a COFF file. */
821 coff_write_native_symbol (abfd, symbol, written)
823 coff_symbol_type *symbol;
824 unsigned int *written;
826 combined_entry_type *native = symbol->native;
827 alent *lineno = symbol->lineno;
829 /* If this symbol has an associated line number, we must store the
830 symbol index in the line number field. We also tag the auxent to
831 point to the right place in the lineno table. */
832 if (lineno && !symbol->done_lineno)
834 unsigned int count = 0;
835 lineno[count].u.offset = *written;
836 if (native->u.syment.n_numaux)
838 union internal_auxent *a = &((native+1)->u.auxent);
840 a->x_sym.x_fcnary.x_fcn.x_lnnoptr =
841 symbol->symbol.section->output_section->moving_line_filepos;
844 /* Count and relocate all other linenumbers. */
846 while (lineno[count].line_number != 0)
850 I've been told this, but still need proof:
851 > The second bug is also in `bfd/coffcode.h'. This bug
852 > causes the linker to screw up the pc-relocations for
853 > all the line numbers in COFF code. This bug isn't only
854 > specific to A29K implementations, but affects all
855 > systems using COFF format binaries. Note that in COFF
856 > object files, the line number core offsets output by
857 > the assembler are relative to the start of each
858 > procedure, not to the start of the .text section. This
859 > patch relocates the line numbers relative to the
860 > `native->u.syment.n_value' instead of the section
864 lineno[count].u.offset += native->u.syment.n_value;
866 lineno[count].u.offset +=
867 (symbol->symbol.section->output_section->vma
868 + symbol->symbol.section->output_offset);
872 symbol->done_lineno = true;
874 symbol->symbol.section->output_section->moving_line_filepos +=
875 count * bfd_coff_linesz (abfd);
878 return coff_write_symbol (abfd, &(symbol->symbol), native, written);
881 /* Write out the COFF symbols. */
884 coff_write_symbols (abfd)
888 unsigned int limit = bfd_get_symcount(abfd);
889 unsigned int written = 0;
893 debug_string_size = 0;
895 /* Seek to the right place */
896 if (bfd_seek (abfd, obj_sym_filepos(abfd), SEEK_SET) != 0)
899 /* Output all the symbols we have */
902 for (p = abfd->outsymbols, i = 0; i < limit; i++, p++)
904 asymbol *symbol = *p;
905 coff_symbol_type *c_symbol = coff_symbol_from (abfd, symbol);
907 if (c_symbol == (coff_symbol_type *) NULL
908 || c_symbol->native == (combined_entry_type *)NULL)
910 if (! coff_write_alien_symbol (abfd, symbol, &written))
915 if (! coff_write_native_symbol (abfd, c_symbol, &written))
920 obj_raw_syment_count (abfd) = written;
922 /* Now write out strings */
924 if (string_size != 0)
926 unsigned int size = string_size + STRING_SIZE_SIZE;
927 bfd_byte buffer[STRING_SIZE_SIZE];
929 #if STRING_SIZE_SIZE == 4
930 bfd_h_put_32 (abfd, size, buffer);
932 #error Change bfd_h_put_32
934 if (bfd_write ((PTR) buffer, 1, sizeof (buffer), abfd) != sizeof (buffer))
936 for (p = abfd->outsymbols, i = 0;
941 size_t name_length = strlen (q->name);
942 coff_symbol_type *c_symbol = coff_symbol_from (abfd, q);
945 /* Figure out whether the symbol name should go in the string
946 table. Symbol names that are short enough are stored
947 directly in the syment structure. File names permit a
948 different, longer, length in the syment structure. On
949 XCOFF, some symbol names are stored in the .debug section
950 rather than in the string table. */
953 || c_symbol->native == NULL)
955 /* This is not a COFF symbol, so it certainly is not a
956 file name, nor does it go in the .debug section. */
959 else if (bfd_coff_symname_in_debug (abfd,
960 &c_symbol->native->u.syment))
962 /* This symbol name is in the XCOFF .debug section.
963 Don't write it into the string table. */
964 maxlen = name_length;
966 else if (c_symbol->native->u.syment.n_sclass == C_FILE)
971 if (name_length > maxlen)
973 if (bfd_write ((PTR) (q->name), 1, name_length + 1, abfd)
981 /* We would normally not write anything here, but we'll write
982 out 4 so that any stupid coff reader which tries to read the
983 string table even when there isn't one won't croak. */
984 unsigned int size = STRING_SIZE_SIZE;
985 bfd_byte buffer[STRING_SIZE_SIZE];
987 #if STRING_SIZE_SIZE == 4
988 bfd_h_put_32 (abfd, size, buffer);
990 #error Change bfd_h_put_32
992 if (bfd_write ((PTR) buffer, 1, STRING_SIZE_SIZE, abfd)
997 /* Make sure the .debug section was created to be the correct size.
998 We should create it ourselves on the fly, but we don't because
999 BFD won't let us write to any section until we know how large all
1000 the sections are. We could still do it by making another pass
1001 over the symbols. FIXME. */
1002 BFD_ASSERT (debug_string_size == 0
1003 || (debug_string_section != (asection *) NULL
1004 && (BFD_ALIGN (debug_string_size,
1005 1 << debug_string_section->alignment_power)
1006 == bfd_section_size (abfd, debug_string_section))));
1012 coff_write_linenumbers (abfd)
1016 bfd_size_type linesz;
1019 linesz = bfd_coff_linesz (abfd);
1020 buff = bfd_alloc (abfd, linesz);
1023 bfd_set_error (bfd_error_no_memory);
1026 for (s = abfd->sections; s != (asection *) NULL; s = s->next) {
1027 if (s->lineno_count) {
1028 asymbol **q = abfd->outsymbols;
1029 if (bfd_seek(abfd, s->line_filepos, SEEK_SET) != 0)
1031 /* Find all the linenumbers in this section */
1034 if (p->section->output_section == s) {
1036 BFD_SEND(bfd_asymbol_bfd(p), _get_lineno, (bfd_asymbol_bfd(p), p));
1038 /* Found a linenumber entry, output */
1039 struct internal_lineno out;
1040 memset( (PTR)&out, 0, sizeof(out));
1042 out.l_addr.l_symndx = l->u.offset;
1043 bfd_coff_swap_lineno_out(abfd, &out, buff);
1044 if (bfd_write(buff, 1, linesz, abfd) != linesz)
1047 while (l->line_number) {
1048 out.l_lnno = l->line_number;
1049 out.l_addr.l_symndx = l->u.offset;
1050 bfd_coff_swap_lineno_out(abfd, &out, buff);
1051 if (bfd_write(buff, 1, linesz, abfd) != linesz)
1061 bfd_release (abfd, buff);
1067 coff_get_lineno (ignore_abfd, symbol)
1071 return coffsymbol(symbol)->lineno;
1075 coff_section_symbol (abfd, name)
1079 asection *sec = bfd_make_section_old_way (abfd, name);
1081 combined_entry_type *csym;
1084 csym = coff_symbol_from (abfd, sym)->native;
1085 /* Make sure back-end COFF stuff is there. */
1089 coff_symbol_type sym;
1090 /* @@FIXME This shouldn't use a fixed size!! */
1091 combined_entry_type e[10];
1094 f = (struct foo *) bfd_alloc_by_size_t (abfd, sizeof (*f));
1097 bfd_set_error (bfd_error_no_error);
1100 memset ((char *) f, 0, sizeof (*f));
1101 coff_symbol_from (abfd, sym)->native = csym = f->e;
1103 csym[0].u.syment.n_sclass = C_STAT;
1104 csym[0].u.syment.n_numaux = 1;
1105 /* SF_SET_STATICS (sym); @@ ??? */
1106 csym[1].u.auxent.x_scn.x_scnlen = sec->_raw_size;
1107 csym[1].u.auxent.x_scn.x_nreloc = sec->reloc_count;
1108 csym[1].u.auxent.x_scn.x_nlinno = sec->lineno_count;
1110 if (sec->output_section == NULL)
1112 sec->output_section = sec;
1113 sec->output_offset = 0;
1119 /* This function transforms the offsets into the symbol table into
1120 pointers to syments. */
1123 coff_pointerize_aux (abfd, table_base, type, class, auxent)
1125 combined_entry_type *table_base;
1128 combined_entry_type *auxent;
1130 /* Don't bother if this is a file or a section */
1131 if (class == C_STAT && type == T_NULL) return;
1132 if (class == C_FILE) return;
1134 /* Otherwise patch up */
1135 #define N_TMASK coff_data (abfd)->local_n_tmask
1136 #define N_BTSHFT coff_data (abfd)->local_n_btshft
1137 if ((ISFCN(type) || ISTAG(class) || class == C_BLOCK)
1138 && auxent->u.auxent.x_sym.x_fcnary.x_fcn.x_endndx.l > 0)
1140 auxent->u.auxent.x_sym.x_fcnary.x_fcn.x_endndx.p =
1142 + auxent->u.auxent.x_sym.x_fcnary.x_fcn.x_endndx.l);
1143 auxent->fix_end = 1;
1145 /* A negative tagndx is meaningless, but the SCO 3.2v4 cc can
1146 generate one, so we must be careful to ignore it. */
1147 if (auxent->u.auxent.x_sym.x_tagndx.l > 0) {
1148 auxent->u.auxent.x_sym.x_tagndx.p =
1149 table_base + auxent->u.auxent.x_sym.x_tagndx.l;
1150 auxent->fix_tag = 1;
1155 build_string_table (abfd)
1158 char string_table_size_buffer[STRING_SIZE_SIZE];
1159 unsigned int string_table_size;
1162 /* At this point we should be "seek"'d to the end of the
1163 symbols === the symbol table size. */
1164 if (bfd_read((char *) string_table_size_buffer,
1165 sizeof(string_table_size_buffer),
1166 1, abfd) != sizeof(string_table_size))
1169 #if STRING_SIZE_SIZE == 4
1170 string_table_size = bfd_h_get_32(abfd, (bfd_byte *) string_table_size_buffer);
1172 #error Change bfd_h_get_32
1175 if ((string_table = (PTR) bfd_alloc(abfd,
1176 string_table_size -= STRING_SIZE_SIZE))
1179 bfd_set_error (bfd_error_no_memory);
1181 } /* on mallocation error */
1182 if (bfd_read(string_table, string_table_size, 1, abfd) != string_table_size)
1184 return string_table;
1187 /* Allocate space for the ".debug" section, and read it.
1188 We did not read the debug section until now, because
1189 we didn't want to go to the trouble until someone needed it. */
1192 build_debug_section (abfd)
1195 char *debug_section;
1198 asection *sect = bfd_get_section_by_name (abfd, ".debug");
1201 bfd_set_error (bfd_error_no_debug_section);
1205 debug_section = (PTR) bfd_alloc (abfd,
1206 bfd_get_section_size_before_reloc (sect));
1207 if (debug_section == NULL) {
1208 bfd_set_error (bfd_error_no_memory);
1212 /* Seek to the beginning of the `.debug' section and read it.
1213 Save the current position first; it is needed by our caller.
1214 Then read debug section and reset the file pointer. */
1216 position = bfd_tell (abfd);
1217 if (bfd_seek (abfd, sect->filepos, SEEK_SET) != 0
1218 || (bfd_read (debug_section,
1219 bfd_get_section_size_before_reloc (sect), 1, abfd)
1220 != bfd_get_section_size_before_reloc(sect))
1221 || bfd_seek (abfd, position, SEEK_SET) != 0)
1223 return debug_section;
1227 /* Return a pointer to a malloc'd copy of 'name'. 'name' may not be
1228 \0-terminated, but will not exceed 'maxlen' characters. The copy *will*
1229 be \0-terminated. */
1231 copy_name (abfd, name, maxlen)
1239 for (len = 0; len < maxlen; ++len) {
1240 if (name[len] == '\0') {
1245 if ((newname = (PTR) bfd_alloc(abfd, len+1)) == NULL) {
1246 bfd_set_error (bfd_error_no_memory);
1249 strncpy(newname, name, len);
1250 newname[len] = '\0';
1254 /* Read a symbol table into freshly bfd_allocated memory, swap it, and
1255 knit the symbol names into a normalized form. By normalized here I
1256 mean that all symbols have an n_offset pointer that points to a null-
1257 terminated string. */
1259 combined_entry_type *
1260 coff_get_normalized_symtab (abfd)
1263 combined_entry_type *internal;
1264 combined_entry_type *internal_ptr;
1265 combined_entry_type *symbol_ptr;
1266 combined_entry_type *internal_end;
1267 bfd_size_type symesz;
1271 char *string_table = NULL;
1272 char *debug_section = NULL;
1274 unsigned int raw_size;
1276 if (obj_raw_syments (abfd) != NULL)
1277 return obj_raw_syments (abfd);
1279 size = obj_raw_syment_count (abfd) * sizeof (combined_entry_type);
1280 internal = (combined_entry_type *) bfd_alloc (abfd, size);
1281 if (internal == NULL && size != 0)
1283 bfd_set_error (bfd_error_no_memory);
1286 internal_end = internal + obj_raw_syment_count (abfd);
1288 symesz = bfd_coff_symesz (abfd);
1289 raw_size = obj_raw_syment_count (abfd) * symesz;
1290 raw = bfd_alloc (abfd, raw_size);
1291 if (raw == NULL && raw_size != 0)
1293 bfd_set_error (bfd_error_no_memory);
1297 if (bfd_seek (abfd, obj_sym_filepos (abfd), SEEK_SET) == -1
1298 || bfd_read (raw, raw_size, 1, abfd) != raw_size)
1301 /* mark the end of the symbols */
1302 raw_end = (char *) raw + obj_raw_syment_count (abfd) * symesz;
1305 FIXME SOMEDAY. A string table size of zero is very weird, but
1306 probably possible. If one shows up, it will probably kill us.
1309 /* Swap all the raw entries */
1310 for (raw_src = (char *) raw, internal_ptr = internal;
1312 raw_src += symesz, internal_ptr++) {
1315 bfd_coff_swap_sym_in(abfd, (PTR)raw_src, (PTR)&internal_ptr->u.syment);
1316 internal_ptr->fix_value = 0;
1317 internal_ptr->fix_tag = 0;
1318 internal_ptr->fix_end = 0;
1319 internal_ptr->fix_scnlen = 0;
1320 symbol_ptr = internal_ptr;
1323 i < symbol_ptr->u.syment.n_numaux;
1329 internal_ptr->fix_value = 0;
1330 internal_ptr->fix_tag = 0;
1331 internal_ptr->fix_end = 0;
1332 internal_ptr->fix_scnlen = 0;
1333 bfd_coff_swap_aux_in(abfd, (PTR) raw_src,
1334 symbol_ptr->u.syment.n_type,
1335 symbol_ptr->u.syment.n_sclass,
1336 i, symbol_ptr->u.syment.n_numaux,
1337 &(internal_ptr->u.auxent));
1338 /* Remember that bal entries arn't pointerized */
1339 if (i != 1 || symbol_ptr->u.syment.n_sclass != C_LEAFPROC)
1342 coff_pointerize_aux(abfd,
1344 symbol_ptr->u.syment.n_type,
1345 symbol_ptr->u.syment.n_sclass,
1352 /* Free all the raw stuff */
1354 bfd_release (abfd, raw);
1356 for (internal_ptr = internal; internal_ptr < internal_end;
1359 if (internal_ptr->u.syment.n_sclass == C_FILE
1360 && internal_ptr->u.syment.n_numaux > 0) {
1361 /* make a file symbol point to the name in the auxent, since
1362 the text ".file" is redundant */
1363 if ((internal_ptr+1)->u.auxent.x_file.x_n.x_zeroes == 0) {
1364 /* the filename is a long one, point into the string table */
1365 if (string_table == NULL) {
1366 string_table = build_string_table(abfd);
1369 internal_ptr->u.syment._n._n_n._n_offset =
1370 (long) (string_table - STRING_SIZE_SIZE +
1371 (internal_ptr+1)->u.auxent.x_file.x_n.x_offset);
1374 /* ordinary short filename, put into memory anyway */
1375 internal_ptr->u.syment._n._n_n._n_offset = (long)
1376 copy_name(abfd, (internal_ptr+1)->u.auxent.x_file.x_fname,
1381 if (internal_ptr->u.syment._n._n_n._n_zeroes != 0) {
1382 /* This is a "short" name. Make it long. */
1383 unsigned long i = 0;
1384 char *newstring = NULL;
1386 /* find the length of this string without walking into memory
1388 for (i = 0; i < 8; ++i) {
1389 if (internal_ptr->u.syment._n._n_name[i] == '\0') {
1391 } /* if end of string */
1392 } /* possible lengths of this string. */
1394 if ((newstring = (PTR) bfd_alloc(abfd, ++i)) == NULL) {
1395 bfd_set_error (bfd_error_no_memory);
1398 memset(newstring, 0, i);
1399 strncpy(newstring, internal_ptr->u.syment._n._n_name, i-1);
1400 internal_ptr->u.syment._n._n_n._n_offset = (long int) newstring;
1401 internal_ptr->u.syment._n._n_n._n_zeroes = 0;
1403 else if (internal_ptr->u.syment._n._n_n._n_offset == 0)
1404 internal_ptr->u.syment._n._n_n._n_offset = (long int) "";
1405 else if (!bfd_coff_symname_in_debug(abfd, &internal_ptr->u.syment)) {
1406 /* Long name already. Point symbol at the string in the table. */
1407 if (string_table == NULL) {
1408 string_table = build_string_table(abfd);
1410 internal_ptr->u.syment._n._n_n._n_offset = (long int)
1413 + internal_ptr->u.syment._n._n_n._n_offset);
1416 /* Long name in debug section. Very similar. */
1417 if (debug_section == NULL) {
1418 debug_section = build_debug_section(abfd);
1420 internal_ptr->u.syment._n._n_n._n_offset = (long int)
1421 (debug_section + internal_ptr->u.syment._n._n_n._n_offset);
1424 internal_ptr += internal_ptr->u.syment.n_numaux;
1427 obj_raw_syments(abfd) = internal;
1428 BFD_ASSERT (obj_raw_syment_count (abfd) == internal_ptr - internal);
1431 } /* coff_get_normalized_symtab() */
1434 coff_get_reloc_upper_bound (abfd, asect)
1438 if (bfd_get_format(abfd) != bfd_object) {
1439 bfd_set_error (bfd_error_invalid_operation);
1442 return (asect->reloc_count + 1) * sizeof(arelent *);
1446 coff_make_empty_symbol (abfd)
1449 coff_symbol_type *new = (coff_symbol_type *) bfd_alloc(abfd, sizeof(coff_symbol_type));
1451 bfd_set_error (bfd_error_no_memory);
1454 memset (new, 0, sizeof *new);
1455 new->symbol.section = 0;
1457 new->lineno = (alent *) NULL;
1458 new->done_lineno = false;
1459 new->symbol.the_bfd = abfd;
1460 return &new->symbol;
1463 /* Make a debugging symbol. */
1466 coff_bfd_make_debug_symbol (abfd, ptr, sz)
1471 coff_symbol_type *new = (coff_symbol_type *) bfd_alloc(abfd, sizeof(coff_symbol_type));
1473 bfd_set_error (bfd_error_no_memory);
1476 /* @@ This shouldn't be using a constant multiplier. */
1477 new->native = (combined_entry_type *) bfd_zalloc (abfd, sizeof (combined_entry_type) * 10);
1480 bfd_set_error (bfd_error_no_memory);
1483 new->symbol.section = &bfd_debug_section;
1484 new->lineno = (alent *) NULL;
1485 new->done_lineno = false;
1486 new->symbol.the_bfd = abfd;
1487 return &new->symbol;
1492 coff_get_symbol_info (abfd, symbol, ret)
1497 bfd_symbol_info (symbol, ret);
1500 /* Print out information about COFF symbol. */
1503 coff_print_symbol (abfd, filep, symbol, how)
1507 bfd_print_symbol_type how;
1509 FILE *file = (FILE *) filep;
1513 case bfd_print_symbol_name:
1514 fprintf (file, "%s", symbol->name);
1517 case bfd_print_symbol_more:
1518 fprintf (file, "coff %s %s",
1519 coffsymbol(symbol)->native ? "n" : "g",
1520 coffsymbol(symbol)->lineno ? "l" : " ");
1523 case bfd_print_symbol_all:
1524 if (coffsymbol(symbol)->native)
1527 combined_entry_type *combined = coffsymbol (symbol)->native;
1528 combined_entry_type *root = obj_raw_syments (abfd);
1529 struct lineno_cache_entry *l = coffsymbol(symbol)->lineno;
1531 fprintf (file,"[%3ld]", (long) (combined - root));
1534 "(sc %2d)(fl 0x%02x)(ty %3x)(sc %3d) (nx %d) 0x%08lx %s",
1535 combined->u.syment.n_scnum,
1536 combined->u.syment.n_flags,
1537 combined->u.syment.n_type,
1538 combined->u.syment.n_sclass,
1539 combined->u.syment.n_numaux,
1540 (unsigned long) combined->u.syment.n_value,
1543 for (aux = 0; aux < combined->u.syment.n_numaux; aux++)
1545 combined_entry_type *auxp = combined + aux + 1;
1549 tagndx = auxp->u.auxent.x_sym.x_tagndx.p - root;
1551 tagndx = auxp->u.auxent.x_sym.x_tagndx.l;
1553 fprintf (file, "\n");
1554 switch (combined->u.syment.n_sclass)
1557 fprintf (file, "File ");
1561 if (combined->u.syment.n_type == T_NULL)
1562 /* probably a section symbol? */
1564 fprintf (file, "AUX scnlen 0x%lx nreloc %d nlnno %d",
1565 (long) auxp->u.auxent.x_scn.x_scnlen,
1566 auxp->u.auxent.x_scn.x_nreloc,
1567 auxp->u.auxent.x_scn.x_nlinno);
1570 /* else fall through */
1573 fprintf (file, "AUX lnno %d size 0x%x tagndx %ld",
1574 auxp->u.auxent.x_sym.x_misc.x_lnsz.x_lnno,
1575 auxp->u.auxent.x_sym.x_misc.x_lnsz.x_size,
1578 fprintf (file, " endndx %ld",
1580 (auxp->u.auxent.x_sym.x_fcnary.x_fcn.x_endndx.p
1588 fprintf (file, "\n%s :", l->u.sym->name);
1590 while (l->line_number)
1592 fprintf (file, "\n%4d : 0x%lx",
1595 (l->u.offset + symbol->section->vma)));
1602 bfd_print_symbol_vandf ((PTR) file, symbol);
1603 fprintf (file, " %-5s %s %s %s",
1604 symbol->section->name,
1605 coffsymbol(symbol)->native ? "n" : "g",
1606 coffsymbol(symbol)->lineno ? "l" : " ",
1612 /* Provided a BFD, a section and an offset into the section, calculate
1613 and return the name of the source file and the line nearest to the
1618 coff_find_nearest_line (abfd, section, ignore_symbols, offset, filename_ptr,
1619 functionname_ptr, line_ptr)
1622 asymbol **ignore_symbols;
1624 CONST char **filename_ptr;
1625 CONST char **functionname_ptr;
1626 unsigned int *line_ptr;
1628 static bfd *cache_abfd;
1629 static asection *cache_section;
1630 static bfd_vma cache_offset;
1631 static unsigned int cache_i;
1632 static CONST char *cache_function;
1633 static unsigned int line_base = 0;
1636 coff_data_type *cof = coff_data(abfd);
1637 /* Run through the raw syments if available */
1638 combined_entry_type *p;
1639 combined_entry_type *pend;
1644 *functionname_ptr = 0;
1647 /* Don't try and find line numbers in a non coff file */
1648 if (abfd->xvec->flavour != bfd_target_coff_flavour)
1654 /* Find the first C_FILE symbol. */
1655 p = cof->raw_syments;
1656 pend = p + cof->raw_syment_count;
1659 if (p->u.syment.n_sclass == C_FILE)
1661 p += 1 + p->u.syment.n_numaux;
1668 /* Look through the C_FILE symbols to find the best one. */
1669 *filename_ptr = (char *) p->u.syment._n._n_n._n_offset;
1670 maxdiff = (bfd_vma) 0 - (bfd_vma) 1;
1673 combined_entry_type *p2;
1675 for (p2 = p + 1 + p->u.syment.n_numaux;
1677 p2 += 1 + p2->u.syment.n_numaux)
1679 if (p2->u.syment.n_scnum > 0
1681 == coff_section_from_bfd_index (abfd,
1682 p2->u.syment.n_scnum)))
1684 if (p2->u.syment.n_sclass == C_FILE)
1692 && offset >= p2->u.syment.n_value
1693 && offset - p2->u.syment.n_value < maxdiff)
1695 *filename_ptr = (char *) p->u.syment._n._n_n._n_offset;
1696 maxdiff = offset - p2->u.syment.n_value;
1699 /* Avoid endless loops on erroneous files by ensuring that
1700 we always move forward in the file. */
1701 if (p - cof->raw_syments >= p->u.syment.n_value)
1704 p = cof->raw_syments + p->u.syment.n_value;
1705 if (p > pend || p->u.syment.n_sclass != C_FILE)
1710 /* Now wander though the raw linenumbers of the section */
1712 If this is the same BFD as we were previously called with and this is
1713 the same section, and the offset we want is further down then we can
1714 prime the lookup loop
1716 if (abfd == cache_abfd &&
1717 section == cache_section &&
1718 offset >= cache_offset) {
1720 *functionname_ptr = cache_function;
1725 l = §ion->lineno[i];
1727 for (; i < section->lineno_count; i++) {
1728 if (l->line_number == 0) {
1729 /* Get the symbol this line number points at */
1730 coff_symbol_type *coff = (coff_symbol_type *) (l->u.sym);
1731 if (coff->symbol.value > offset)
1733 *functionname_ptr = coff->symbol.name;
1735 combined_entry_type *s = coff->native;
1736 s = s + 1 + s->u.syment.n_numaux;
1738 /* In XCOFF a debugging symbol can follow the function
1740 if (s->u.syment.n_scnum == N_DEBUG)
1741 s = s + 1 + s->u.syment.n_numaux;
1744 S should now point to the .bf of the function
1746 if (s->u.syment.n_numaux) {
1748 The linenumber is stored in the auxent
1750 union internal_auxent *a = &((s + 1)->u.auxent);
1751 line_base = a->x_sym.x_misc.x_lnsz.x_lnno;
1752 *line_ptr = line_base;
1757 if (l->u.offset + bfd_get_section_vma (abfd, section) > offset)
1759 *line_ptr = l->line_number + line_base - 1;
1765 cache_section = section;
1766 cache_offset = offset;
1768 cache_function = *functionname_ptr;
1774 coff_sizeof_headers (abfd, reloc)
1780 if (reloc == false) {
1781 size = bfd_coff_filhsz (abfd) + bfd_coff_aoutsz (abfd);
1784 size = bfd_coff_filhsz (abfd);
1787 size += abfd->section_count * bfd_coff_scnhsz (abfd);