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[binutils-gdb.git] / gas / config / obj-coffbfd.c
1 /* coff object file format with bfd
2 Copyright (C) 1989, 1990, 1991 Free Software Foundation, Inc.
3
4 This file is part of GAS.
5
6 GAS is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2, or (at your option)
9 any later version.
10
11 GAS is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with GAS; see the file COPYING. If not, write to
18 the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
19
20 /*
21
22 How does this releate to the rest of GAS ?
23
24 Well, all the other files in gas are more or less a black box. It
25 takes care of opening files, parsing command lines, stripping blanks
26 etc etc. This module gets a chance to register what it wants to do by
27 saying that it is interested in various pseduo ops. The other big
28 change is write_object_file. This runs through all the data
29 structures that gas builds, and outputs the file in the format of our
30 choice.
31
32 Hacked for BFDness by steve chamberlain
33
34 This object module now supports the Hitachi H8/300 and the AMD 29k
35
36 sac@cygnus.com
37 */
38
39 #include "as.h"
40 #include "obstack.h"
41 #include "subsegs.h"
42 #include "frags.h"
43 #include "../bfd/libbfd.h"
44 #include "../bfd/libcoff.h"
45
46 /* The NOP_OPCODE is for the alignment fill value. Fill with nop so
47 that we can stick sections together without causing trouble. */
48 #ifndef NOP_OPCODE
49 #define NOP_OPCODE 0x00
50 #endif
51
52 #define MIN(a,b) ((a) < (b)? (a) : (b))
53 /* This vector is used to turn an internal segment into a section #
54 suitable for insertion into a coff symbol table
55 */
56
57 const short seg_N_TYPE[] =
58 { /* in: segT out: N_TYPE bits */
59 C_ABS_SECTION,
60 1,
61 2,
62 3,
63 4,
64 5,
65 6,
66 7,
67 8,
68 9,
69 10,
70 C_UNDEF_SECTION, /* SEG_UNKNOWN */
71 C_UNDEF_SECTION, /* SEG_ABSENT */
72 C_UNDEF_SECTION, /* SEG_PASS1 */
73 C_UNDEF_SECTION, /* SEG_GOOF */
74 C_UNDEF_SECTION, /* SEG_BIG */
75 C_UNDEF_SECTION, /* SEG_DIFFERENCE */
76 C_DEBUG_SECTION, /* SEG_DEBUG */
77 C_NTV_SECTION, /* SEG_NTV */
78 C_PTV_SECTION, /* SEG_PTV */
79 C_REGISTER_SECTION, /* SEG_REGISTER */
80 };
81
82
83 int function_lineoff = -1; /* Offset in line#s where the last function
84 started (the odd entry for line #0) */
85
86
87 static symbolS *last_line_symbol;
88
89 /* Add 4 to the real value to get the index and compensate the
90 negatives. This vector is used by S_GET_SEGMENT to turn a coff
91 section number into a segment number
92 */
93 static symbolS *previous_file_symbol = NULL;
94 void c_symbol_merge ();
95 static int line_base;
96
97 symbolS *c_section_symbol ();
98 bfd *abfd;
99 void EXFUN (bfd_as_write_hook, (struct internal_filehdr *,
100 bfd * abfd));
101
102 static void EXFUN (fixup_segment, (segment_info_type *segP,
103 segT this_segment_type));
104
105
106 static void EXFUN (fixup_mdeps, (fragS *,
107 object_headers *,
108 segT));
109
110
111 static void EXFUN (fill_section, (bfd * abfd,
112 object_headers *,
113 unsigned long *));
114
115
116 char *EXFUN (s_get_name, (symbolS * s));
117 static symbolS *EXFUN (tag_find_or_make, (char *name));
118 static symbolS *EXFUN (tag_find, (char *name));
119
120
121 static int
122 EXFUN (c_line_new, (
123 symbolS * symbol,
124 long paddr,
125 unsigned short line_number,
126 fragS * frag));
127
128
129 static void EXFUN (w_symbols,
130 (bfd * abfd,
131 char *where,
132 symbolS * symbol_rootP));
133
134
135
136 static void EXFUN (obj_coff_def, (int what));
137 static void EXFUN (obj_coff_lcomm, (void));
138 static void EXFUN (obj_coff_dim, (void));
139 static void EXFUN (obj_coff_text, (void));
140 static void EXFUN (obj_coff_data, (void));
141 static void EXFUN( obj_coff_bss,(void));
142 static void EXFUN( obj_coff_ident,(void));
143 static void EXFUN (obj_coff_endef, (void));
144 static void EXFUN (obj_coff_line, (void));
145 static void EXFUN (obj_coff_ln, (void));
146 static void EXFUN (obj_coff_scl, (void));
147 static void EXFUN (obj_coff_size, (void));
148 static void EXFUN (obj_coff_tag, (void));
149 static void EXFUN (obj_coff_type, (void));
150 static void EXFUN (obj_coff_val, (void));
151 void EXFUN (obj_coff_section, (void));
152 static void EXFUN (tag_init, (void));
153 static void EXFUN (tag_insert, (char *name, symbolS * symbolP));
154
155
156 static struct hash_control *tag_hash;
157 static symbolS *def_symbol_in_progress = NULL;
158
159 const pseudo_typeS obj_pseudo_table[] =
160 {
161 {"def", obj_coff_def, 0},
162 {"dim", obj_coff_dim, 0},
163 {"endef", obj_coff_endef, 0},
164 {"line", obj_coff_line, 0},
165 {"ln", obj_coff_ln, 0},
166 {"scl", obj_coff_scl, 0},
167 {"size", obj_coff_size, 0},
168 {"tag", obj_coff_tag, 0},
169 {"type", obj_coff_type, 0},
170 {"val", obj_coff_val, 0},
171 {"section", obj_coff_section, 0},
172 {"use", obj_coff_section, 0},
173 {"sect", obj_coff_section, 0},
174 {"text", obj_coff_text, 0},
175 {"data", obj_coff_data, 0},
176 {"bss", obj_coff_bss, 0},
177 {"ident", obj_coff_ident, 0},
178 {"ABORT", s_abort, 0},
179 {"lcomm", obj_coff_lcomm, 0},
180 {NULL} /* end sentinel */
181 }; /* obj_pseudo_table */
182
183
184
185 /* Section stuff
186
187 We allow more than just the standard 3 sections, infact, we allow
188 10 sections, (though the usual three have to be there).
189
190 This structure performs the mappings for us:
191
192 */
193
194 /* OBS stuff
195 static struct internal_scnhdr bss_section_header;
196 struct internal_scnhdr data_section_header;
197 struct internal_scnhdr text_section_header;
198
199 const segT N_TYPE_seg [32] =
200 {
201
202 };
203
204 */
205
206 #define N_SEG 32
207 typedef struct
208 {
209 segT seg_t;
210 int i;
211 } seg_info_type;
212
213 seg_info_type seg_info_off_by_4[N_SEG] =
214 {
215 {SEG_PTV, },
216 {SEG_NTV, },
217 {SEG_DEBUG, },
218 {SEG_ABSOLUTE, },
219 {SEG_UNKNOWN, },
220 {SEG_E0},
221 {SEG_E1},
222 {SEG_E2},
223 {SEG_E3},
224 {SEG_E4},
225 {SEG_E5},
226 {SEG_E6},
227 {SEG_E7},
228 {SEG_E8},
229 {SEG_E9},
230 {(segT)15},
231 {(segT)16},
232 {(segT)17},
233 {(segT)18},
234 {(segT)19},
235 {(segT)20},
236 {(segT)0},
237 {(segT)0},
238 {(segT)0},
239 {SEG_REGISTER}
240 };
241
242
243
244 #define SEG_INFO_FROM_SECTION_NUMBER(x) (seg_info_off_by_4[(x)+4])
245 #define SEG_INFO_FROM_SEG_NUMBER(x) (seg_info_off_by_4[(x)])
246
247
248 relax_addressT
249 DEFUN (relax_align, (address, alignment),
250 register relax_addressT address AND
251 register long alignment)
252 {
253 relax_addressT mask;
254 relax_addressT new_address;
255
256 mask = ~((~0) << alignment);
257 new_address = (address + mask) & (~mask);
258 return (new_address - address);
259 } /* relax_align() */
260
261
262 segT
263 DEFUN (s_get_segment, (x),
264 symbolS * x)
265 {
266 return SEG_INFO_FROM_SECTION_NUMBER (x->sy_symbol.ost_entry.n_scnum).seg_t;
267 }
268
269
270
271 /* calculate the size of the frag chain and fill in the section header
272 to contain all of it, also fill in the addr of the sections */
273 static unsigned int
274 DEFUN (size_section, (abfd, idx),
275 bfd * abfd AND
276 unsigned int idx)
277 {
278
279 unsigned int size = 0;
280 fragS *frag = segment_info[idx].frchainP->frch_root;
281 while (frag)
282 {
283 size = frag->fr_address;
284 if (frag->fr_address != size)
285 {
286 printf ("Out of step\n");
287 size = frag->fr_address;
288 }
289
290 switch (frag->fr_type)
291 {
292 #ifdef TC_COFF_SIZEMACHDEP
293 case rs_machine_dependent:
294 size += TC_COFF_SIZEMACHDEP (frag);
295 break;
296 #endif
297 case rs_fill:
298 case rs_org:
299 size += frag->fr_fix;
300 size += frag->fr_offset * frag->fr_var;
301 break;
302 case rs_align:
303 size += frag->fr_fix;
304 size += relax_align (size, frag->fr_offset);
305 }
306 frag = frag->fr_next;
307 }
308 segment_info[idx].scnhdr.s_size = size;
309 return size;
310 }
311
312
313 static unsigned int
314 DEFUN (count_entries_in_chain, (idx),
315 unsigned int idx)
316 {
317 unsigned int nrelocs;
318 fixS *fixup_ptr;
319
320 /* Count the relocations */
321 fixup_ptr = segment_info[idx].fix_root;
322 nrelocs = 0;
323 while (fixup_ptr != (fixS *) NULL)
324 {
325 if (TC_COUNT_RELOC (fixup_ptr))
326 {
327
328 #ifdef TC_A29K
329
330 if (fixup_ptr->fx_r_type == RELOC_CONSTH)
331 nrelocs += 2;
332 else
333 nrelocs++;
334 #else
335 nrelocs++;
336 #endif
337 }
338
339 fixup_ptr = fixup_ptr->fx_next;
340 }
341 return nrelocs;
342 }
343
344 /* output all the relocations for a section */
345 void
346 DEFUN (do_relocs_for, (abfd, h, file_cursor),
347 bfd * abfd AND
348 object_headers * h AND
349 unsigned long *file_cursor)
350 {
351 unsigned int nrelocs;
352 unsigned int idx;
353 unsigned long reloc_start = *file_cursor;
354
355 for (idx = SEG_E0; idx < SEG_E9; idx++)
356 {
357 if (segment_info[idx].scnhdr.s_name[0])
358 {
359 struct external_reloc *ext_ptr;
360 struct external_reloc *external_reloc_vec;
361 unsigned int external_reloc_size;
362 unsigned int count = 0;
363 unsigned int base = segment_info[idx].scnhdr.s_paddr;
364 fixS *fix_ptr = segment_info[idx].fix_root;
365 nrelocs = count_entries_in_chain (idx);
366
367 external_reloc_size = nrelocs * RELSZ;
368 external_reloc_vec =
369 (struct external_reloc *) malloc (external_reloc_size);
370
371 ext_ptr = external_reloc_vec;
372
373 /* Fill in the internal coff style reloc struct from the
374 internal fix list. */
375 while (fix_ptr)
376 {
377 symbolS *symbol_ptr;
378 struct internal_reloc intr;
379
380 /* Only output some of the relocations */
381 if (TC_COUNT_RELOC (fix_ptr))
382 {
383 #ifdef TC_RELOC_MANGLE
384 TC_RELOC_MANGLE (fix_ptr, &intr, base);
385
386 #else
387 symbolS *dot;
388 symbol_ptr = fix_ptr->fx_addsy;
389
390 intr.r_type = TC_COFF_FIX2RTYPE (fix_ptr);
391 intr.r_vaddr =
392 base + fix_ptr->fx_frag->fr_address + fix_ptr->fx_where;
393
394 intr.r_offset = fix_ptr->fx_offset;
395
396 intr.r_offset = 0;
397
398 /* Turn the segment of the symbol into an offset. */
399 if (symbol_ptr)
400 {
401 dot = segment_info[S_GET_SEGMENT (symbol_ptr)].dot;
402 if (dot)
403 {
404 intr.r_symndx = dot->sy_number;
405 }
406 else
407 {
408 intr.r_symndx = symbol_ptr->sy_number;
409 }
410
411 }
412 else
413 {
414 intr.r_symndx = -1;
415 }
416 #endif
417
418 (void) bfd_coff_swap_reloc_out (abfd, &intr, ext_ptr);
419 ext_ptr++;
420
421 #if defined(TC_A29K)
422
423 /* The 29k has a special kludge for the high 16 bit
424 reloc. Two relocations are emited, R_IHIHALF,
425 and R_IHCONST. The second one doesn't contain a
426 symbol, but uses the value for offset. */
427
428 if (intr.r_type == R_IHIHALF)
429 {
430 /* now emit the second bit */
431 intr.r_type = R_IHCONST;
432 intr.r_symndx = fix_ptr->fx_addnumber;
433
434 /* The offset to the segment holding the symbol
435 has already been counted in the R_IHIHALF.
436 We don't want to add it in again for the
437 R_IHCONST. */
438 if (symbol_ptr)
439 intr.r_symndx -=
440 segment_info[S_GET_SEGMENT (symbol_ptr)].scnhdr.s_paddr;
441 (void) bfd_coff_swap_reloc_out (abfd, &intr, ext_ptr);
442 ext_ptr++;
443 }
444 #endif
445 }
446
447 fix_ptr = fix_ptr->fx_next;
448 }
449
450 /* Write out the reloc table */
451 segment_info[idx].scnhdr.s_relptr = nrelocs ? *file_cursor : 0;
452 segment_info[idx].scnhdr.s_nreloc = nrelocs;
453 bfd_write ((PTR) external_reloc_vec, 1, external_reloc_size, abfd);
454 *file_cursor += external_reloc_size;
455 free (external_reloc_vec);
456 }
457 }
458 /* Set relocation_size field in file headers */
459 H_SET_RELOCATION_SIZE (h, *file_cursor - reloc_start, 0);
460 }
461
462
463 /* run through a frag chain and write out the data to go with it, fill
464 in the scnhdrs with the info on the file postions
465 */
466 static void
467 DEFUN (fill_section, (abfd, h, file_cursor),
468 bfd * abfd AND
469 object_headers *h AND
470 unsigned long *file_cursor)
471 {
472
473 unsigned int i;
474 unsigned int paddr = 0;
475
476 for (i = SEG_E0; i < SEG_UNKNOWN; i++)
477 {
478 unsigned int offset = 0;
479
480 struct internal_scnhdr *s = &(segment_info[i].scnhdr);
481
482 if (s->s_name[0])
483 {
484 fragS *frag = segment_info[i].frchainP->frch_root;
485 char *buffer;
486
487 if (s->s_size == 0)
488 s->s_scnptr = 0;
489 else
490 {
491 buffer = xmalloc (s->s_size);
492 s->s_scnptr = *file_cursor;
493 }
494 know (s->s_paddr == paddr);
495 s->s_vaddr = paddr;
496
497 s->s_flags = STYP_REG;
498 if (strcmp (s->s_name, ".text") == 0)
499 s->s_flags |= STYP_TEXT;
500 else if (strcmp (s->s_name, ".data") == 0)
501 s->s_flags |= STYP_DATA;
502 else if (strcmp (s->s_name, ".bss") == 0)
503 {
504 s->s_scnptr = 0;
505 s->s_flags |= STYP_BSS;
506 #ifndef TC_I386
507 /* Apparently the SVR3 linker is confused by noload
508 sections. */
509 s->s_flags |= STYP_NOLOAD;
510 #endif
511 }
512 else if (strcmp (s->s_name, ".lit") == 0)
513 s->s_flags = STYP_LIT | STYP_TEXT;
514 else if (strcmp (s->s_name, ".init") == 0)
515 s->s_flags |= STYP_TEXT;
516 else if (strcmp (s->s_name, ".fini") == 0)
517 s->s_flags |= STYP_TEXT;
518 else if (strncmp (s->s_name, ".comment", 8) == 0)
519 s->s_flags |= STYP_INFO;
520
521 while (frag)
522 {
523 unsigned int fill_size;
524 switch (frag->fr_type)
525 {
526 case rs_machine_dependent:
527 if (frag->fr_fix)
528 {
529 memcpy (buffer + frag->fr_address,
530 frag->fr_literal,
531 frag->fr_fix);
532 offset += frag->fr_fix;
533 }
534
535 break;
536 case rs_fill:
537 case rs_align:
538 case rs_org:
539 if (frag->fr_fix)
540 {
541 memcpy (buffer + frag->fr_address,
542 frag->fr_literal,
543 frag->fr_fix);
544 offset += frag->fr_fix;
545 }
546
547 fill_size = frag->fr_var;
548 if (fill_size)
549 {
550 unsigned int count;
551 unsigned int off = frag->fr_fix;
552 for (count = frag->fr_offset; count; count--)
553 {
554 if (fill_size < s->s_size)
555 {
556 memcpy (buffer + frag->fr_address + off,
557 frag->fr_literal + frag->fr_fix,
558 fill_size);
559 off += fill_size;
560 offset += fill_size;
561 }
562 }
563 }
564 break;
565 case rs_broken_word:
566 break;
567 default:
568 abort ();
569 }
570 frag = frag->fr_next;
571 }
572
573 if (s->s_size != 0)
574 {
575 if (s->s_scnptr != 0)
576 {
577 bfd_write (buffer, s->s_size, 1, abfd);
578 *file_cursor += s->s_size;
579 }
580 free (buffer);
581 }
582 paddr += s->s_size;
583 }
584 }
585 }
586
587 /* Coff file generation & utilities */
588
589 static void
590 DEFUN (coff_header_append, (abfd, h),
591 bfd * abfd AND
592 object_headers * h)
593 {
594 unsigned int i;
595 char buffer[1000];
596 char buffero[1000];
597
598 bfd_seek (abfd, 0, 0);
599
600 #ifndef OBJ_COFF_OMIT_OPTIONAL_HEADER
601 H_SET_MAGIC_NUMBER (h, COFF_MAGIC);
602 H_SET_VERSION_STAMP (h, 0);
603 H_SET_ENTRY_POINT (h, 0);
604 H_SET_TEXT_START (h, segment_info[SEG_E0].frchainP->frch_root->fr_address);
605 H_SET_DATA_START (h, segment_info[SEG_E1].frchainP->frch_root->fr_address);
606 H_SET_SIZEOF_OPTIONAL_HEADER (h, bfd_coff_swap_aouthdr_out(abfd, &h->aouthdr,
607 buffero));
608 #else /* defined (OBJ_COFF_OMIT_OPTIONAL_HEADER) */
609 H_SET_SIZEOF_OPTIONAL_HEADER (h, 0);
610 #endif /* defined (OBJ_COFF_OMIT_OPTIONAL_HEADER) */
611
612 i = bfd_coff_swap_filehdr_out (abfd, &h->filehdr, buffer);
613
614 bfd_write (buffer, i, 1, abfd);
615 bfd_write (buffero, H_GET_SIZEOF_OPTIONAL_HEADER (h), 1, abfd);
616
617 for (i = SEG_E0; i < SEG_E9; i++)
618 {
619 if (segment_info[i].scnhdr.s_name[0])
620 {
621 unsigned int size =
622 bfd_coff_swap_scnhdr_out (abfd,
623 &(segment_info[i].scnhdr),
624 buffer);
625 bfd_write (buffer, size, 1, abfd);
626 }
627 }
628 }
629
630
631 char *
632 DEFUN (symbol_to_chars, (abfd, where, symbolP),
633 bfd * abfd AND
634 char *where AND
635 symbolS * symbolP)
636 {
637 unsigned int numaux = symbolP->sy_symbol.ost_entry.n_numaux;
638 unsigned int i;
639
640 /* Turn any symbols with register attributes into abs symbols */
641 if (S_GET_SEGMENT (symbolP) == SEG_REGISTER)
642 {
643 S_SET_SEGMENT (symbolP, SEG_ABSOLUTE);
644 }
645 /* At the same time, relocate all symbols to their output value */
646
647 S_SET_VALUE (symbolP,
648 segment_info[S_GET_SEGMENT (symbolP)].scnhdr.s_paddr
649 + S_GET_VALUE (symbolP));
650
651 where += bfd_coff_swap_sym_out (abfd, &symbolP->sy_symbol.ost_entry,
652 where);
653
654 for (i = 0; i < numaux; i++)
655 {
656 where += bfd_coff_swap_aux_out (abfd,
657 &symbolP->sy_symbol.ost_auxent[i],
658 S_GET_DATA_TYPE (symbolP),
659 S_GET_STORAGE_CLASS (symbolP),
660 where);
661 }
662 return where;
663
664 }
665
666
667
668
669 void
670 obj_symbol_new_hook (symbolP)
671 symbolS *symbolP;
672 {
673 char underscore = 0; /* Symbol has leading _ */
674
675 /* Effective symbol */
676 /* Store the pointer in the offset. */
677 S_SET_ZEROES (symbolP, 0L);
678 S_SET_DATA_TYPE (symbolP, T_NULL);
679 S_SET_STORAGE_CLASS (symbolP, 0);
680 S_SET_NUMBER_AUXILIARY (symbolP, 0);
681 /* Additional information */
682 symbolP->sy_symbol.ost_flags = 0;
683 /* Auxiliary entries */
684 bzero ((char *) &symbolP->sy_symbol.ost_auxent[0], AUXESZ);
685
686 #ifdef STRIP_UNDERSCORE
687 /* Remove leading underscore at the beginning of the symbol.
688 * This is to be compatible with the standard librairies.
689 */
690 if (*S_GET_NAME (symbolP) == '_')
691 {
692 underscore = 1;
693 S_SET_NAME (symbolP, S_GET_NAME (symbolP) + 1);
694 } /* strip underscore */
695 #endif /* STRIP_UNDERSCORE */
696
697 if (S_IS_STRING (symbolP))
698 SF_SET_STRING (symbolP);
699 if (!underscore && S_IS_LOCAL (symbolP))
700 SF_SET_LOCAL (symbolP);
701
702 return;
703 } /* obj_symbol_new_hook() */
704
705 /* stack stuff */
706 stack *
707 stack_init (chunk_size, element_size)
708 unsigned long chunk_size;
709 unsigned long element_size;
710 {
711 stack *st;
712
713 if ((st = (stack *) malloc (sizeof (stack))) == (stack *) 0)
714 return (stack *) 0;
715 if ((st->data = malloc (chunk_size)) == (char *) 0)
716 {
717 free (st);
718 return (stack *) 0;
719 }
720 st->pointer = 0;
721 st->size = chunk_size;
722 st->chunk_size = chunk_size;
723 st->element_size = element_size;
724 return st;
725 } /* stack_init() */
726
727 void
728 stack_delete (st)
729 stack *st;
730 {
731 free (st->data);
732 free (st);
733 }
734
735 char *
736 stack_push (st, element)
737 stack *st;
738 char *element;
739 {
740 if (st->pointer + st->element_size >= st->size)
741 {
742 st->size += st->chunk_size;
743 if ((st->data = xrealloc (st->data, st->size)) == (char *) 0)
744 return (char *) 0;
745 }
746 memcpy (st->data + st->pointer, element, st->element_size);
747 st->pointer += st->element_size;
748 return st->data + st->pointer;
749 } /* stack_push() */
750
751 char *
752 stack_pop (st)
753 stack *st;
754 {
755 if ((st->pointer -= st->element_size) < 0)
756 {
757 st->pointer = 0;
758 return (char *) 0;
759 }
760
761 return st->data + st->pointer;
762 }
763
764 char *
765 stack_top (st)
766 stack *st;
767 {
768 return st->data + st->pointer - st->element_size;
769 }
770
771
772 /*
773 * Handle .ln directives.
774 */
775
776 static void
777 obj_coff_ln ()
778 {
779 int l;
780
781 if (def_symbol_in_progress != NULL)
782 {
783 as_warn (".ln pseudo-op inside .def/.endef: ignored.");
784 demand_empty_rest_of_line ();
785 return;
786 } /* wrong context */
787
788 c_line_new (0,
789 obstack_next_free (&frags) - frag_now->fr_literal,
790 l = get_absolute_expression (),
791 frag_now);
792 #ifndef NO_LISTING
793 {
794 extern int listing;
795
796 if (listing)
797 {
798 listing_source_line (l + line_base - 1);
799 }
800
801 }
802 #endif
803 demand_empty_rest_of_line ();
804 return;
805 } /* obj_coff_line() */
806
807 /*
808 * def()
809 *
810 * Handle .def directives.
811 *
812 * One might ask : why can't we symbol_new if the symbol does not
813 * already exist and fill it with debug information. Because of
814 * the C_EFCN special symbol. It would clobber the value of the
815 * function symbol before we have a chance to notice that it is
816 * a C_EFCN. And a second reason is that the code is more clear this
817 * way. (at least I think it is :-).
818 *
819 */
820
821 #define SKIP_SEMI_COLON() while (*input_line_pointer++ != ';')
822 #define SKIP_WHITESPACES() while (*input_line_pointer == ' ' || \
823 *input_line_pointer == '\t') \
824 input_line_pointer++;
825
826 static void
827 DEFUN (obj_coff_def, (what),
828 int what)
829 {
830 char name_end; /* Char after the end of name */
831 char *symbol_name; /* Name of the debug symbol */
832 char *symbol_name_copy; /* Temporary copy of the name */
833 unsigned int symbol_name_length;
834 /*$char* directiveP;$ *//* Name of the pseudo opcode */
835 /*$char directive[MAX_DIRECTIVE];$ *//* Backup of the directive */
836 /*$char end = 0;$ *//* If 1, stop parsing */
837
838 if (def_symbol_in_progress != NULL)
839 {
840 as_warn (".def pseudo-op used inside of .def/.endef: ignored.");
841 demand_empty_rest_of_line ();
842 return;
843 } /* if not inside .def/.endef */
844
845 SKIP_WHITESPACES ();
846
847 def_symbol_in_progress = (symbolS *) obstack_alloc (&notes, sizeof (*def_symbol_in_progress));
848 bzero (def_symbol_in_progress, sizeof (*def_symbol_in_progress));
849
850 symbol_name = input_line_pointer;
851 name_end = get_symbol_end ();
852 symbol_name_length = strlen (symbol_name);
853 symbol_name_copy = xmalloc (symbol_name_length + 1);
854 strcpy (symbol_name_copy, symbol_name);
855
856 /* Initialize the new symbol */
857 #ifdef STRIP_UNDERSCORE
858 S_SET_NAME (def_symbol_in_progress, (*symbol_name_copy == '_'
859 ? symbol_name_copy + 1
860 : symbol_name_copy));
861 #else /* STRIP_UNDERSCORE */
862 S_SET_NAME (def_symbol_in_progress, symbol_name_copy);
863 #endif /* STRIP_UNDERSCORE */
864 /* free(symbol_name_copy); */
865 def_symbol_in_progress->sy_name_offset = ~0;
866 def_symbol_in_progress->sy_number = ~0;
867 def_symbol_in_progress->sy_frag = &zero_address_frag;
868
869 if (S_IS_STRING (def_symbol_in_progress))
870 {
871 SF_SET_STRING (def_symbol_in_progress);
872 } /* "long" name */
873
874 *input_line_pointer = name_end;
875
876 demand_empty_rest_of_line ();
877 return;
878 } /* obj_coff_def() */
879
880 unsigned int dim_index;
881 static void
882 DEFUN_VOID (obj_coff_endef)
883 {
884 symbolS *symbolP = 0;
885 /* DIM BUG FIX sac@cygnus.com */
886 dim_index = 0;
887 if (def_symbol_in_progress == NULL)
888 {
889 as_warn (".endef pseudo-op used outside of .def/.endef: ignored.");
890 demand_empty_rest_of_line ();
891 return;
892 } /* if not inside .def/.endef */
893
894 /* Set the section number according to storage class. */
895 switch (S_GET_STORAGE_CLASS (def_symbol_in_progress))
896 {
897 case C_STRTAG:
898 case C_ENTAG:
899 case C_UNTAG:
900 SF_SET_TAG (def_symbol_in_progress);
901 /* intentional fallthrough */
902 case C_FILE:
903 case C_TPDEF:
904 SF_SET_DEBUG (def_symbol_in_progress);
905 S_SET_SEGMENT (def_symbol_in_progress, SEG_DEBUG);
906 break;
907
908 case C_EFCN:
909 SF_SET_LOCAL (def_symbol_in_progress); /* Do not emit this symbol. */
910 /* intentional fallthrough */
911 case C_BLOCK:
912 SF_SET_PROCESS (def_symbol_in_progress); /* Will need processing before writing */
913 /* intentional fallthrough */
914 case C_FCN:
915 S_SET_SEGMENT (def_symbol_in_progress, SEG_E0);
916
917 if (strcmp (def_symbol_in_progress->sy_symbol.ost_entry._n._n_nptr,
918 ".bf") == 0)
919 { /* .bf */
920 if (function_lineoff < 0)
921 {
922 fprintf (stderr, "`.bf' symbol without preceding function\n");
923 } /* missing function symbol */
924 SA_GET_SYM_LNNOPTR (last_line_symbol) = function_lineoff;
925
926 SF_SET_PROCESS (last_line_symbol);
927 function_lineoff = -1;
928 }
929 break;
930
931 #ifdef C_AUTOARG
932 case C_AUTOARG:
933 #endif /* C_AUTOARG */
934 case C_AUTO:
935 case C_REG:
936 case C_MOS:
937 case C_MOE:
938 case C_MOU:
939 case C_ARG:
940 case C_REGPARM:
941 case C_FIELD:
942 case C_EOS:
943 SF_SET_DEBUG (def_symbol_in_progress);
944 S_SET_SEGMENT (def_symbol_in_progress, SEG_ABSOLUTE);
945 break;
946
947 case C_EXT:
948 case C_STAT:
949 case C_LABEL:
950 /* Valid but set somewhere else (s_comm, s_lcomm, colon) */
951 break;
952
953 case C_USTATIC:
954 case C_EXTDEF:
955 case C_ULABEL:
956 as_warn ("unexpected storage class %d", S_GET_STORAGE_CLASS (def_symbol_in_progress));
957 break;
958 } /* switch on storage class */
959
960 /* Now that we have built a debug symbol, try to find if
961 we should merge with an existing symbol or not. If a
962 symbol is C_EFCN or SEG_ABSOLUTE or untagged
963 SEG_DEBUG it never merges. We also don't merge
964 labels, which are in a different namespace, nor
965 symbols which have not yet been defined since they
966 are typically unique, nor do we merge tags with
967 non-tags. */
968
969 /* Two cases for functions. Either debug followed
970 by definition or definition followed by debug.
971 For definition first, we will merge the debug
972 symbol into the definition. For debug first, the
973 lineno entry MUST point to the definition
974 function or else it will point off into space
975 when crawl_symbols() merges the debug
976 symbol into the real symbol. Therefor, let's
977 presume the debug symbol is a real function
978 reference. */
979
980 /* FIXME-SOON If for some reason the definition
981 label/symbol is never seen, this will probably
982 leave an undefined symbol at link time. */
983
984 if (S_GET_STORAGE_CLASS (def_symbol_in_progress) == C_EFCN
985 || S_GET_STORAGE_CLASS (def_symbol_in_progress) == C_LABEL
986 || (S_GET_SEGMENT (def_symbol_in_progress) == SEG_DEBUG
987 && !SF_GET_TAG (def_symbol_in_progress))
988 || S_GET_SEGMENT (def_symbol_in_progress) == SEG_ABSOLUTE
989 || def_symbol_in_progress->sy_forward != NULL
990 || (symbolP = symbol_find_base (S_GET_NAME (def_symbol_in_progress), DO_NOT_STRIP)) == NULL
991 || (SF_GET_TAG (def_symbol_in_progress) != SF_GET_TAG (symbolP)))
992 {
993
994 symbol_append (def_symbol_in_progress, symbol_lastP, &symbol_rootP, &symbol_lastP);
995
996 }
997 else
998 {
999 /* This symbol already exists, merge the
1000 newly created symbol into the old one.
1001 This is not mandatory. The linker can
1002 handle duplicate symbols correctly. But I
1003 guess that it save a *lot* of space if
1004 the assembly file defines a lot of
1005 symbols. [loic] */
1006
1007 /* The debug entry (def_symbol_in_progress)
1008 is merged into the previous definition. */
1009
1010 c_symbol_merge (def_symbol_in_progress, symbolP);
1011 /* FIXME-SOON Should *def_symbol_in_progress be free'd? xoxorich. */
1012 def_symbol_in_progress = symbolP;
1013
1014 if (SF_GET_FUNCTION (def_symbol_in_progress)
1015 || SF_GET_TAG (def_symbol_in_progress))
1016 {
1017 /* For functions, and tags, the symbol *must* be where the debug symbol
1018 appears. Move the existing symbol to the current place. */
1019 /* If it already is at the end of the symbol list, do nothing */
1020 if (def_symbol_in_progress != symbol_lastP)
1021 {
1022 symbol_remove (def_symbol_in_progress, &symbol_rootP, &symbol_lastP);
1023 symbol_append (def_symbol_in_progress, symbol_lastP, &symbol_rootP, &symbol_lastP);
1024 } /* if not already in place */
1025 } /* if function */
1026 } /* normal or mergable */
1027
1028 if (SF_GET_TAG (def_symbol_in_progress)
1029 && symbol_find_base (S_GET_NAME (def_symbol_in_progress), DO_NOT_STRIP) == NULL)
1030 {
1031 tag_insert (S_GET_NAME (def_symbol_in_progress), def_symbol_in_progress);
1032 } /* If symbol is a {structure,union} tag, associate symbol to its name. */
1033
1034 if (SF_GET_FUNCTION (def_symbol_in_progress))
1035 {
1036 know (sizeof (def_symbol_in_progress) <= sizeof (long));
1037 function_lineoff
1038 = c_line_new (def_symbol_in_progress, 0, 0, &zero_address_frag);
1039
1040
1041
1042 SF_SET_PROCESS (def_symbol_in_progress);
1043
1044 if (symbolP == NULL)
1045 {
1046 /* That is, if this is the first
1047 time we've seen the function... */
1048 symbol_table_insert (def_symbol_in_progress);
1049 } /* definition follows debug */
1050 } /* Create the line number entry pointing to the function being defined */
1051
1052 def_symbol_in_progress = NULL;
1053 demand_empty_rest_of_line ();
1054 return;
1055 } /* obj_coff_endef() */
1056
1057 static void
1058 DEFUN_VOID (obj_coff_dim)
1059 {
1060 register int dim_index;
1061
1062 if (def_symbol_in_progress == NULL)
1063 {
1064 as_warn (".dim pseudo-op used outside of .def/.endef: ignored.");
1065 demand_empty_rest_of_line ();
1066 return;
1067 } /* if not inside .def/.endef */
1068
1069 S_SET_NUMBER_AUXILIARY (def_symbol_in_progress, 1);
1070
1071 for (dim_index = 0; dim_index < DIMNUM; dim_index++)
1072 {
1073 SKIP_WHITESPACES ();
1074 SA_SET_SYM_DIMEN (def_symbol_in_progress, dim_index, get_absolute_expression ());
1075
1076 switch (*input_line_pointer)
1077 {
1078
1079 case ',':
1080 input_line_pointer++;
1081 break;
1082
1083 default:
1084 as_warn ("badly formed .dim directive ignored");
1085 /* intentional fallthrough */
1086 case '\n':
1087 case ';':
1088 dim_index = DIMNUM;
1089 break;
1090 } /* switch on following character */
1091 } /* for each dimension */
1092
1093 demand_empty_rest_of_line ();
1094 return;
1095 } /* obj_coff_dim() */
1096
1097 static void
1098 obj_coff_line ()
1099 {
1100 int this_base;
1101
1102 if (def_symbol_in_progress == NULL)
1103 {
1104 obj_coff_ln ();
1105 return;
1106 } /* if it looks like a stabs style line */
1107
1108 this_base = get_absolute_expression ();
1109 if (this_base > line_base)
1110 {
1111 line_base = this_base;
1112 }
1113
1114
1115 #ifndef NO_LISTING
1116 {
1117 extern int listing;
1118 if (listing && 0)
1119 {
1120 listing_source_line (line_base);
1121 }
1122 }
1123 #endif
1124 S_SET_NUMBER_AUXILIARY (def_symbol_in_progress, 1);
1125 SA_SET_SYM_LNNO (def_symbol_in_progress, line_base);
1126
1127 demand_empty_rest_of_line ();
1128 return;
1129 } /* obj_coff_line() */
1130
1131 static void
1132 obj_coff_size ()
1133 {
1134 if (def_symbol_in_progress == NULL)
1135 {
1136 as_warn (".size pseudo-op used outside of .def/.endef ignored.");
1137 demand_empty_rest_of_line ();
1138 return;
1139 } /* if not inside .def/.endef */
1140
1141 S_SET_NUMBER_AUXILIARY (def_symbol_in_progress, 1);
1142 SA_SET_SYM_SIZE (def_symbol_in_progress, get_absolute_expression ());
1143 demand_empty_rest_of_line ();
1144 return;
1145 } /* obj_coff_size() */
1146
1147 static void
1148 obj_coff_scl ()
1149 {
1150 if (def_symbol_in_progress == NULL)
1151 {
1152 as_warn (".scl pseudo-op used outside of .def/.endef ignored.");
1153 demand_empty_rest_of_line ();
1154 return;
1155 } /* if not inside .def/.endef */
1156
1157 S_SET_STORAGE_CLASS (def_symbol_in_progress, get_absolute_expression ());
1158 demand_empty_rest_of_line ();
1159 return;
1160 } /* obj_coff_scl() */
1161
1162 static void
1163 obj_coff_tag ()
1164 {
1165 char *symbol_name;
1166 char name_end;
1167
1168 if (def_symbol_in_progress == NULL)
1169 {
1170 as_warn (".tag pseudo-op used outside of .def/.endef ignored.");
1171 demand_empty_rest_of_line ();
1172 return;
1173 } /* if not inside .def/.endef */
1174
1175 S_SET_NUMBER_AUXILIARY (def_symbol_in_progress, 1);
1176 symbol_name = input_line_pointer;
1177 name_end = get_symbol_end ();
1178
1179 /* Assume that the symbol referred to by .tag is always defined. */
1180 /* This was a bad assumption. I've added find_or_make. xoxorich. */
1181 SA_SET_SYM_TAGNDX (def_symbol_in_progress, (long) tag_find_or_make (symbol_name));
1182 if (SA_GET_SYM_TAGNDX (def_symbol_in_progress) == 0L)
1183 {
1184 as_warn ("tag not found for .tag %s", symbol_name);
1185 } /* not defined */
1186
1187 SF_SET_TAGGED (def_symbol_in_progress);
1188 *input_line_pointer = name_end;
1189
1190 demand_empty_rest_of_line ();
1191 return;
1192 } /* obj_coff_tag() */
1193
1194 static void
1195 obj_coff_type ()
1196 {
1197 if (def_symbol_in_progress == NULL)
1198 {
1199 as_warn (".type pseudo-op used outside of .def/.endef ignored.");
1200 demand_empty_rest_of_line ();
1201 return;
1202 } /* if not inside .def/.endef */
1203
1204 S_SET_DATA_TYPE (def_symbol_in_progress, get_absolute_expression ());
1205
1206 if (ISFCN (S_GET_DATA_TYPE (def_symbol_in_progress)) &&
1207 S_GET_STORAGE_CLASS (def_symbol_in_progress) != C_TPDEF)
1208 {
1209 SF_SET_FUNCTION (def_symbol_in_progress);
1210 } /* is a function */
1211
1212 demand_empty_rest_of_line ();
1213 return;
1214 } /* obj_coff_type() */
1215
1216 static void
1217 obj_coff_val ()
1218 {
1219 if (def_symbol_in_progress == NULL)
1220 {
1221 as_warn (".val pseudo-op used outside of .def/.endef ignored.");
1222 demand_empty_rest_of_line ();
1223 return;
1224 } /* if not inside .def/.endef */
1225
1226 if (is_name_beginner (*input_line_pointer))
1227 {
1228 char *symbol_name = input_line_pointer;
1229 char name_end = get_symbol_end ();
1230
1231 if (!strcmp (symbol_name, "."))
1232 {
1233 def_symbol_in_progress->sy_frag = frag_now;
1234 S_SET_VALUE (def_symbol_in_progress, obstack_next_free (&frags) - frag_now->fr_literal);
1235 /* If the .val is != from the .def (e.g. statics) */
1236 }
1237 else if (strcmp (S_GET_NAME (def_symbol_in_progress), symbol_name))
1238 {
1239 def_symbol_in_progress->sy_forward = symbol_find_or_make (symbol_name);
1240
1241 /* If the segment is undefined when the forward
1242 reference is solved, then copy the segment id
1243 from the forward symbol. */
1244 SF_SET_GET_SEGMENT (def_symbol_in_progress);
1245
1246 /* FIXME: gcc can generate address expressions
1247 here in unusual cases (search for "obscure"
1248 in sdbout.c). We just ignore the offset
1249 here, thus generating incorrect debugging
1250 information. We ignore the rest of the
1251 line just below. */
1252 }
1253 /* Otherwise, it is the name of a non debug symbol and
1254 its value will be calculated later. */
1255 *input_line_pointer = name_end;
1256
1257 /* FIXME: this is to avoid an error message in the
1258 FIXME case mentioned just above. */
1259 while (! is_end_of_line[*input_line_pointer])
1260 ++input_line_pointer;
1261 }
1262 else
1263 {
1264 S_SET_VALUE (def_symbol_in_progress, get_absolute_expression ());
1265 } /* if symbol based */
1266
1267 demand_empty_rest_of_line ();
1268 return;
1269 } /* obj_coff_val() */
1270
1271 /*
1272 * Maintain a list of the tagnames of the structres.
1273 */
1274
1275 static void
1276 tag_init ()
1277 {
1278 tag_hash = hash_new ();
1279 return;
1280 } /* tag_init() */
1281
1282 static void
1283 tag_insert (name, symbolP)
1284 char *name;
1285 symbolS *symbolP;
1286 {
1287 register char *error_string;
1288
1289 if (*(error_string = hash_jam (tag_hash, name, (char *) symbolP)))
1290 {
1291 as_fatal ("Inserting \"%s\" into structure table failed: %s",
1292 name, error_string);
1293 }
1294 return;
1295 } /* tag_insert() */
1296
1297 static symbolS *
1298 tag_find_or_make (name)
1299 char *name;
1300 {
1301 symbolS *symbolP;
1302
1303 if ((symbolP = tag_find (name)) == NULL)
1304 {
1305 symbolP = symbol_new (name,
1306 SEG_UNKNOWN,
1307 0,
1308 &zero_address_frag);
1309
1310 tag_insert (S_GET_NAME (symbolP), symbolP);
1311 } /* not found */
1312
1313 return (symbolP);
1314 } /* tag_find_or_make() */
1315
1316 static symbolS *
1317 tag_find (name)
1318 char *name;
1319 {
1320 #ifdef STRIP_UNDERSCORE
1321 if (*name == '_')
1322 name++;
1323 #endif /* STRIP_UNDERSCORE */
1324 return ((symbolS *) hash_find (tag_hash, name));
1325 } /* tag_find() */
1326
1327 void
1328 obj_read_begin_hook ()
1329 {
1330 /* These had better be the same. Usually 18 bytes. */
1331 #ifndef BFD_HEADERS
1332 know (sizeof (SYMENT) == sizeof (AUXENT));
1333 know (SYMESZ == AUXESZ);
1334 #endif
1335 tag_init ();
1336
1337 return;
1338 } /* obj_read_begin_hook() */
1339
1340 /* This function runs through the symbol table and puts all the
1341 externals onto another chain */
1342
1343 /* The chain of externals */
1344 symbolS *symbol_externP = NULL;
1345 symbolS *symbol_extern_lastP = NULL;
1346
1347 stack *block_stack;
1348 symbolS *last_functionP = NULL;
1349 symbolS *last_tagP;
1350
1351
1352 static unsigned int
1353 DEFUN_VOID (yank_symbols)
1354 {
1355 symbolS *symbolP;
1356 unsigned int symbol_number = 0;
1357
1358 for (symbolP = symbol_rootP;
1359 symbolP;
1360 symbolP = symbolP ? symbol_next (symbolP) : symbol_rootP)
1361 {
1362 if (!SF_GET_DEBUG (symbolP))
1363 {
1364 /* Debug symbols do not need all this rubbish */
1365 symbolS *real_symbolP;
1366
1367 /* L* and C_EFCN symbols never merge. */
1368 if (!SF_GET_LOCAL (symbolP)
1369 && S_GET_STORAGE_CLASS (symbolP) != C_LABEL
1370 && (real_symbolP = symbol_find_base (S_GET_NAME (symbolP), DO_NOT_STRIP))
1371 && real_symbolP != symbolP)
1372 {
1373 /* FIXME-SOON: where do dups come from?
1374 Maybe tag references before definitions? xoxorich. */
1375 /* Move the debug data from the debug symbol to the
1376 real symbol. Do NOT do the oposite (i.e. move from
1377 real symbol to debug symbol and remove real symbol from the
1378 list.) Because some pointers refer to the real symbol
1379 whereas no pointers refer to the debug symbol. */
1380 c_symbol_merge (symbolP, real_symbolP);
1381 /* Replace the current symbol by the real one */
1382 /* The symbols will never be the last or the first
1383 because : 1st symbol is .file and 3 last symbols are
1384 .text, .data, .bss */
1385 symbol_remove (real_symbolP, &symbol_rootP, &symbol_lastP);
1386 symbol_insert (real_symbolP, symbolP, &symbol_rootP, &symbol_lastP);
1387 symbol_remove (symbolP, &symbol_rootP, &symbol_lastP);
1388 symbolP = real_symbolP;
1389 } /* if not local but dup'd */
1390
1391 if (flagseen['R'] && (S_GET_SEGMENT (symbolP) == SEG_E1))
1392 {
1393 S_SET_SEGMENT (symbolP, SEG_E0);
1394 } /* push data into text */
1395
1396 S_SET_VALUE (symbolP,
1397 S_GET_VALUE (symbolP) + symbolP->sy_frag->fr_address);
1398
1399 if (!S_IS_DEFINED (symbolP) && !SF_GET_LOCAL (symbolP))
1400 {
1401 S_SET_EXTERNAL (symbolP);
1402 }
1403 else if (S_GET_STORAGE_CLASS (symbolP) == C_NULL)
1404 {
1405 if (S_GET_SEGMENT (symbolP) == SEG_E0)
1406 {
1407 S_SET_STORAGE_CLASS (symbolP, C_LABEL);
1408 }
1409 else
1410 {
1411 S_SET_STORAGE_CLASS (symbolP, C_STAT);
1412 }
1413 }
1414
1415 /* Mainly to speed up if not -g */
1416 if (SF_GET_PROCESS (symbolP))
1417 {
1418 /* Handle the nested blocks auxiliary info. */
1419 if (S_GET_STORAGE_CLASS (symbolP) == C_BLOCK)
1420 {
1421 if (!strcmp (S_GET_NAME (symbolP), ".bb"))
1422 stack_push (block_stack, (char *) &symbolP);
1423 else
1424 { /* .eb */
1425 register symbolS *begin_symbolP;
1426 begin_symbolP = *(symbolS **) stack_pop (block_stack);
1427 if (begin_symbolP == (symbolS *) 0)
1428 as_warn ("mismatched .eb");
1429 else
1430 SA_SET_SYM_ENDNDX (begin_symbolP, symbol_number + 2);
1431 }
1432 }
1433 /* If we are able to identify the type of a function, and we
1434 are out of a function (last_functionP == 0) then, the
1435 function symbol will be associated with an auxiliary
1436 entry. */
1437 if (last_functionP == (symbolS *) 0 &&
1438 SF_GET_FUNCTION (symbolP))
1439 {
1440 last_functionP = symbolP;
1441
1442 if (S_GET_NUMBER_AUXILIARY (symbolP) < 1)
1443 {
1444 S_SET_NUMBER_AUXILIARY (symbolP, 1);
1445 } /* make it at least 1 */
1446
1447 /* Clobber possible stale .dim information. */
1448 #if 0
1449 /* Iffed out by steve - this fries the lnnoptr info too */
1450 bzero (symbolP->sy_symbol.ost_auxent[0].x_sym.x_fcnary.x_ary.x_dimen,
1451 sizeof (symbolP->sy_symbol.ost_auxent[0].x_sym.x_fcnary.x_ary.x_dimen));
1452 #endif
1453 }
1454 /* The C_FCN doesn't need any additional information.
1455 I don't even know if this is needed for sdb. But the
1456 standard assembler generates it, so...
1457 */
1458 if (S_GET_STORAGE_CLASS (symbolP) == C_EFCN)
1459 {
1460 if (last_functionP == (symbolS *) 0)
1461 as_fatal ("C_EFCN symbol out of scope");
1462 SA_SET_SYM_FSIZE (last_functionP,
1463 (long) (S_GET_VALUE (symbolP) -
1464 S_GET_VALUE (last_functionP)));
1465 SA_SET_SYM_ENDNDX (last_functionP, symbol_number);
1466 last_functionP = (symbolS *) 0;
1467 }
1468 }
1469 }
1470 else if (SF_GET_TAG (symbolP))
1471 {
1472 /* First descriptor of a structure must point to
1473 the first slot after the structure description. */
1474 last_tagP = symbolP;
1475
1476 }
1477 else if (S_GET_STORAGE_CLASS (symbolP) == C_EOS)
1478 {
1479 /* +2 take in account the current symbol */
1480 SA_SET_SYM_ENDNDX (last_tagP, symbol_number + 2);
1481 }
1482 else if (S_GET_STORAGE_CLASS (symbolP) == C_FILE)
1483 {
1484 if (S_GET_VALUE (symbolP))
1485 {
1486 S_SET_VALUE ((symbolS *) S_GET_VALUE (symbolP), symbol_number);
1487 S_SET_VALUE (symbolP, 0);
1488 } /* no one points at the first .file symbol */
1489 } /* if debug or tag or eos or file */
1490
1491 /* We must put the external symbols apart. The loader
1492 does not bomb if we do not. But the references in
1493 the endndx field for a .bb symbol are not corrected
1494 if an external symbol is removed between .bb and .be.
1495 I.e in the following case :
1496 [20] .bb endndx = 22
1497 [21] foo external
1498 [22] .be
1499 ld will move the symbol 21 to the end of the list but
1500 endndx will still be 22 instead of 21. */
1501
1502
1503 if (SF_GET_LOCAL (symbolP))
1504 {
1505 /* remove C_EFCN and LOCAL (L...) symbols */
1506 /* next pointer remains valid */
1507 symbol_remove (symbolP, &symbol_rootP, &symbol_lastP);
1508
1509 }
1510 else if (!S_IS_DEFINED (symbolP)
1511 && !S_IS_DEBUG (symbolP)
1512 && !SF_GET_STATICS (symbolP) &&
1513 S_GET_STORAGE_CLASS (symbolP) == C_EXT)
1514 { /* C_EXT && !SF_GET_FUNCTION(symbolP)) */
1515 /* if external, Remove from the list */
1516 symbolS *hold = symbol_previous (symbolP);
1517
1518 symbol_remove (symbolP, &symbol_rootP, &symbol_lastP);
1519 symbol_clear_list_pointers (symbolP);
1520 symbol_append (symbolP, symbol_extern_lastP, &symbol_externP, &symbol_extern_lastP);
1521 symbolP = hold;
1522 }
1523 else
1524 {
1525 if (SF_GET_STRING (symbolP))
1526 {
1527 symbolP->sy_name_offset = string_byte_count;
1528 string_byte_count += strlen (S_GET_NAME (symbolP)) + 1;
1529 }
1530 else
1531 {
1532 symbolP->sy_name_offset = 0;
1533 } /* fix "long" names */
1534
1535 symbolP->sy_number = symbol_number;
1536 symbol_number += 1 + S_GET_NUMBER_AUXILIARY (symbolP);
1537 } /* if local symbol */
1538 } /* traverse the symbol list */
1539 return symbol_number;
1540
1541 }
1542
1543
1544 static unsigned int
1545 DEFUN_VOID (glue_symbols)
1546 {
1547 unsigned int symbol_number = 0;
1548 symbolS *symbolP;
1549 for (symbolP = symbol_externP; symbol_externP;)
1550 {
1551 symbolS *tmp = symbol_externP;
1552
1553 /* append */
1554 symbol_remove (tmp, &symbol_externP, &symbol_extern_lastP);
1555 symbol_append (tmp, symbol_lastP, &symbol_rootP, &symbol_lastP);
1556
1557 /* and process */
1558 if (SF_GET_STRING (tmp))
1559 {
1560 tmp->sy_name_offset = string_byte_count;
1561 string_byte_count += strlen (S_GET_NAME (tmp)) + 1;
1562 }
1563 else
1564 {
1565 tmp->sy_name_offset = 0;
1566 } /* fix "long" names */
1567
1568 tmp->sy_number = symbol_number;
1569 symbol_number += 1 + S_GET_NUMBER_AUXILIARY (tmp);
1570 } /* append the entire extern chain */
1571 return symbol_number;
1572
1573 }
1574
1575 static unsigned int
1576 DEFUN_VOID (tie_tags)
1577 {
1578 unsigned int symbol_number = 0;
1579
1580 symbolS *symbolP;
1581 for (symbolP = symbol_rootP; symbolP; symbolP =
1582 symbol_next (symbolP))
1583 {
1584 symbolP->sy_number = symbol_number;
1585
1586
1587
1588 if (SF_GET_TAGGED (symbolP))
1589 {
1590 SA_SET_SYM_TAGNDX
1591 (symbolP,
1592 ((symbolS *) SA_GET_SYM_TAGNDX (symbolP))->sy_number);
1593 }
1594
1595 symbol_number += 1 + S_GET_NUMBER_AUXILIARY (symbolP);
1596 }
1597 return symbol_number;
1598
1599 }
1600
1601 static void
1602 DEFUN (crawl_symbols, (h, abfd),
1603 object_headers *h AND
1604 bfd * abfd)
1605 {
1606
1607 unsigned int i;
1608 unsigned int ptr = 0;
1609
1610
1611 symbolS *symbolP;
1612
1613 /* Initialize the stack used to keep track of the matching .bb .be */
1614
1615 block_stack = stack_init (512, sizeof (symbolS *));
1616 /* JF deal with forward references first... */
1617 for (symbolP = symbol_rootP;
1618 symbolP;
1619 symbolP = symbol_next (symbolP))
1620 {
1621
1622 if (symbolP->sy_forward)
1623 {
1624 S_SET_VALUE (symbolP, (S_GET_VALUE (symbolP)
1625 + S_GET_VALUE (symbolP->sy_forward)
1626 + symbolP->sy_forward->sy_frag->fr_address));
1627
1628 if (SF_GET_GET_SEGMENT (symbolP))
1629 {
1630 S_SET_SEGMENT (symbolP, S_GET_SEGMENT (symbolP->sy_forward));
1631 } /* forward segment also */
1632
1633 symbolP->sy_forward = 0;
1634 } /* if it has a forward reference */
1635 } /* walk the symbol chain */
1636
1637
1638 /* The symbol list should be ordered according to the following sequence
1639 * order :
1640 * . .file symbol
1641 * . debug entries for functions
1642 * . fake symbols for the sections, including.text .data and .bss
1643 * . defined symbols
1644 * . undefined symbols
1645 * But this is not mandatory. The only important point is to put the
1646 * undefined symbols at the end of the list.
1647 */
1648
1649 if (symbol_rootP == NULL
1650 || S_GET_STORAGE_CLASS (symbol_rootP) != C_FILE)
1651 {
1652 c_dot_file_symbol ("fake");
1653 }
1654 /* Is there a .file symbol ? If not insert one at the beginning. */
1655
1656 /*
1657 * Build up static symbols for the sections, they are filled in later
1658 */
1659
1660
1661 for (i = SEG_E0; i < SEG_E9; i++)
1662 {
1663 if (segment_info[i].scnhdr.s_name[0])
1664 {
1665 char name[9];
1666
1667 strncpy (name, segment_info[i].scnhdr.s_name, 8);
1668 name[8] = '\0';
1669 segment_info[i].dot = c_section_symbol (name, i - SEG_E0 + 1);
1670 }
1671 }
1672
1673
1674 /* Take all the externals out and put them into another chain */
1675 H_SET_SYMBOL_TABLE_SIZE (h, yank_symbols ());
1676 /* Take the externals and glue them onto the end.*/
1677 H_SET_SYMBOL_TABLE_SIZE (h, H_GET_SYMBOL_COUNT (h) + glue_symbols ());
1678
1679 H_SET_SYMBOL_TABLE_SIZE (h, tie_tags ());
1680 know (symbol_externP == NULL);
1681 know (symbol_extern_lastP == NULL);
1682
1683 return;
1684 }
1685
1686 /*
1687 * Find strings by crawling along symbol table chain.
1688 */
1689
1690 void
1691 DEFUN (w_strings, (where),
1692 char *where)
1693 {
1694 symbolS *symbolP;
1695
1696 /* Gotta do md_ byte-ordering stuff for string_byte_count first - KWK */
1697 md_number_to_chars (where, string_byte_count, sizeof (string_byte_count));
1698 where += sizeof (string_byte_count);
1699 for (symbolP = symbol_rootP;
1700 symbolP;
1701 symbolP = symbol_next (symbolP))
1702 {
1703 unsigned int size;
1704
1705 if (SF_GET_STRING (symbolP))
1706 {
1707 size = strlen (S_GET_NAME (symbolP)) + 1;
1708
1709 memcpy (where, S_GET_NAME (symbolP), size);
1710 where += size;
1711
1712 }
1713 }
1714
1715 }
1716
1717 static void
1718 DEFUN (do_linenos_for, (abfd, h, file_cursor),
1719 bfd * abfd AND
1720 object_headers * h AND
1721 unsigned long *file_cursor)
1722 {
1723 unsigned int idx;
1724 unsigned long start = *file_cursor;
1725
1726 for (idx = SEG_E0; idx < SEG_E9; idx++)
1727 {
1728 segment_info_type *s = segment_info + idx;
1729
1730
1731 if (s->scnhdr.s_nlnno != 0)
1732 {
1733 struct lineno_list *line_ptr;
1734
1735 struct external_lineno *buffer =
1736 (struct external_lineno *) xmalloc (s->scnhdr.s_nlnno * LINESZ);
1737
1738 struct external_lineno *dst = buffer;
1739
1740 /* Run through the table we've built and turn it into its external
1741 form, take this chance to remove duplicates */
1742
1743 for (line_ptr = s->lineno_list_head;
1744 line_ptr != (struct lineno_list *) NULL;
1745 line_ptr = line_ptr->next)
1746 {
1747
1748 if (line_ptr->line.l_lnno == 0)
1749 {
1750 /* Turn a pointer to a symbol into the symbols' index */
1751 line_ptr->line.l_addr.l_symndx =
1752 ((symbolS *) line_ptr->line.l_addr.l_symndx)->sy_number;
1753 }
1754 else
1755 {
1756 line_ptr->line.l_addr.l_paddr += ((struct frag *) (line_ptr->frag))->fr_address;
1757 }
1758
1759
1760 (void) bfd_coff_swap_lineno_out (abfd, &(line_ptr->line), dst);
1761 dst++;
1762
1763 }
1764
1765 s->scnhdr.s_lnnoptr = *file_cursor;
1766
1767 bfd_write (buffer, 1, s->scnhdr.s_nlnno * LINESZ, abfd);
1768 free (buffer);
1769
1770 *file_cursor += s->scnhdr.s_nlnno * LINESZ;
1771 }
1772 }
1773 H_SET_LINENO_SIZE (h, *file_cursor - start);
1774 }
1775
1776
1777 /* Now we run through the list of frag chains in a segment and
1778 make all the subsegment frags appear at the end of the
1779 list, as if the seg 0 was extra long */
1780
1781 static void
1782 DEFUN_VOID (remove_subsegs)
1783 {
1784 unsigned int i;
1785
1786 for (i = SEG_E0; i < SEG_UNKNOWN; i++)
1787 {
1788 frchainS *head = segment_info[i].frchainP;
1789 fragS dummy;
1790 fragS *prev_frag = &dummy;
1791
1792 while (head && head->frch_seg == i)
1793 {
1794 prev_frag->fr_next = head->frch_root;
1795 prev_frag = head->frch_last;
1796 head = head->frch_next;
1797 }
1798 prev_frag->fr_next = 0;
1799 }
1800 }
1801
1802 int machine;
1803 int coff_flags;
1804 extern void
1805 DEFUN_VOID (write_object_file)
1806 {
1807 int i;
1808 struct frchain *frchain_ptr;
1809
1810 object_headers headers;
1811 unsigned long file_cursor;
1812 bfd *abfd;
1813 unsigned int addr;
1814 abfd = bfd_openw (out_file_name, TARGET_FORMAT);
1815
1816
1817 if (abfd == 0)
1818 {
1819 as_perror ("FATAL: Can't create %s", out_file_name);
1820 exit (42);
1821 }
1822 bfd_set_format (abfd, bfd_object);
1823 bfd_set_arch_mach (abfd, BFD_ARCH, machine);
1824
1825 string_byte_count = 4;
1826
1827 for (frchain_ptr = frchain_root;
1828 frchain_ptr != (struct frchain *) NULL;
1829 frchain_ptr = frchain_ptr->frch_next)
1830 {
1831 /* Run through all the sub-segments and align them up. Also close any
1832 open frags. We tack a .fill onto the end of the frag chain so
1833 that any .align's size can be worked by looking at the next
1834 frag */
1835
1836 subseg_new (frchain_ptr->frch_seg, frchain_ptr->frch_subseg);
1837 #ifndef SUB_SEGMENT_ALIGN
1838 #define SUB_SEGMENT_ALIGN 1
1839 #endif
1840 frag_align (SUB_SEGMENT_ALIGN, NOP_OPCODE);
1841 frag_wane (frag_now);
1842 frag_now->fr_fix = 0;
1843 know (frag_now->fr_next == NULL);
1844 }
1845
1846
1847 remove_subsegs ();
1848
1849
1850 for (i = SEG_E0; i < SEG_UNKNOWN; i++)
1851 {
1852 relax_segment (segment_info[i].frchainP->frch_root, i);
1853 }
1854
1855 H_SET_NUMBER_OF_SECTIONS (&headers, 0);
1856
1857 /* Find out how big the sections are, and set the addresses. */
1858 addr = 0;
1859 for (i = SEG_E0; i < SEG_UNKNOWN; i++)
1860 {
1861 long size;
1862
1863 segment_info[i].scnhdr.s_paddr = addr;
1864
1865 if (segment_info[i].scnhdr.s_name[0])
1866 {
1867 H_SET_NUMBER_OF_SECTIONS (&headers,
1868 H_GET_NUMBER_OF_SECTIONS (&headers) + 1);
1869 }
1870
1871 size = size_section (abfd, i);
1872 addr += size;
1873
1874 if (i == SEG_E0)
1875 H_SET_TEXT_SIZE (&headers, size);
1876 else if (i == SEG_E1)
1877 H_SET_DATA_SIZE (&headers, size);
1878 else if (i == SEG_E2)
1879 H_SET_BSS_SIZE (&headers, size);
1880 }
1881
1882 /* Turn the gas native symbol table shape into a coff symbol table */
1883 crawl_symbols (&headers, abfd);
1884
1885 if (string_byte_count == 4)
1886 string_byte_count = 0;
1887
1888 H_SET_STRING_SIZE (&headers, string_byte_count);
1889
1890 #if !defined(TC_H8300) && !defined(TC_Z8K)
1891 for (i = SEG_E0; i < SEG_UNKNOWN; i++)
1892 {
1893 fixup_mdeps (segment_info[i].frchainP->frch_root, &headers, i);
1894 fixup_segment (&segment_info[i], i);
1895 }
1896 #endif
1897
1898 file_cursor = H_GET_TEXT_FILE_OFFSET (&headers);
1899
1900 bfd_seek (abfd, file_cursor, 0);
1901
1902 /* Plant the data */
1903
1904 fill_section (abfd, &headers, &file_cursor);
1905
1906 do_relocs_for (abfd, &headers, &file_cursor);
1907
1908 do_linenos_for (abfd, &headers, &file_cursor);
1909
1910 H_SET_FILE_MAGIC_NUMBER (&headers, COFF_MAGIC);
1911 #ifndef OBJ_COFF_OMIT_TIMESTAMP
1912 H_SET_TIME_STAMP (&headers, (long)time((long*)0));
1913 #else
1914 H_SET_TIME_STAMP (&headers, 0);
1915 #endif
1916
1917 #ifdef KEEP_RELOC_INFO
1918 H_SET_FLAGS (&headers, ((H_GET_LINENO_SIZE(&headers) ? 0 : F_LNNO) |
1919 COFF_FLAGS | coff_flags));
1920 #else
1921 H_SET_FLAGS (&headers, ((H_GET_LINENO_SIZE(&headers) ? 0 : F_LNNO) |
1922 (H_GET_RELOCATION_SIZE(&headers) ? 0 : F_RELFLG) |
1923 COFF_FLAGS | coff_flags));
1924 #endif
1925
1926 {
1927 unsigned int symtable_size = H_GET_SYMBOL_TABLE_SIZE (&headers);
1928 char *buffer1 = xmalloc (symtable_size + string_byte_count + 1);
1929 char *ptr = buffer1;
1930 H_SET_SYMBOL_TABLE_POINTER (&headers, bfd_tell (abfd));
1931 w_symbols (abfd, buffer1, symbol_rootP);
1932 if (string_byte_count > 0)
1933 w_strings (buffer1 + symtable_size);
1934 bfd_write (buffer1, 1, symtable_size + string_byte_count, abfd);
1935 free (buffer1);
1936 }
1937
1938 coff_header_append (abfd, &headers);
1939
1940 if (bfd_close_all_done (abfd) == false)
1941 as_fatal ("Can't close %s: %s", out_file_name,
1942 bfd_errmsg (bfd_error));
1943 }
1944
1945
1946 static void
1947 DEFUN (change_to_section, (name, len, exp),
1948 char *name AND
1949 unsigned int len AND
1950 unsigned int exp)
1951 {
1952 unsigned int i;
1953 /* Find out if we've already got a section of this name etc */
1954 for (i = SEG_E0; i < SEG_E9 && segment_info[i].scnhdr.s_name[0]; i++)
1955 {
1956 if (strncmp (segment_info[i].scnhdr.s_name, name, len) == 0)
1957 {
1958 subseg_new (i, exp);
1959 return;
1960
1961 }
1962 }
1963 /* No section, add one */
1964 strncpy (segment_info[i].scnhdr.s_name, name, 8);
1965 subseg_new (i, exp);
1966 }
1967
1968 /*
1969 * implement the .section pseudo op:
1970 * .section name {, "flags"}
1971 * ^ ^
1972 * | +--- optional flags: 'b' for bss
1973 * | 'i' for info
1974 * +-- section name 'l' for lib
1975 * 'n' for noload
1976 * 'o' for over
1977 * 'w' for data
1978 * 'x' for text
1979 * But if the argument is not a quoted string, treat it as a
1980 * subsegment number.
1981 */
1982
1983 void
1984 DEFUN_VOID (obj_coff_section)
1985 {
1986 /* Strip out the section name */
1987 char *section_name;
1988 char *section_name_end;
1989 char c;
1990 int argp;
1991 unsigned int len;
1992 unsigned int exp;
1993 long flags;
1994
1995 section_name = input_line_pointer;
1996 c = get_symbol_end ();
1997 section_name_end = input_line_pointer;
1998
1999 len = section_name_end - section_name;
2000 input_line_pointer++;
2001 SKIP_WHITESPACE ();
2002
2003 argp = 0;
2004 if (c == ',')
2005 argp = 1;
2006 else if (*input_line_pointer == ',')
2007 {
2008 argp = 1;
2009 ++input_line_pointer;
2010 SKIP_WHITESPACE ();
2011 }
2012
2013 exp = 0;
2014 flags = 0;
2015 if (argp)
2016 {
2017 if (*input_line_pointer != '"')
2018 exp = get_absolute_expression ();
2019 else
2020 {
2021 ++input_line_pointer;
2022 while (*input_line_pointer != '"'
2023 && ! is_end_of_line[*input_line_pointer])
2024 {
2025 switch (*input_line_pointer)
2026 {
2027 case 'b': flags |= STYP_BSS; break;
2028 case 'i': flags |= STYP_INFO; break;
2029 case 'l': flags |= STYP_LIB; break;
2030 case 'n': flags |= STYP_NOLOAD; break;
2031 case 'o': flags |= STYP_OVER; break;
2032 case 'w': flags |= STYP_DATA; break;
2033 case 'x': flags |= STYP_TEXT; break;
2034 default:
2035 as_warn("unknown section attribute '%c'",
2036 *input_line_pointer);
2037 break;
2038 }
2039 ++input_line_pointer;
2040 }
2041 if (*input_line_pointer == '"')
2042 ++input_line_pointer;
2043 }
2044 }
2045
2046 change_to_section (section_name, len, exp);
2047
2048 segment_info[now_seg].scnhdr.s_flags |= flags;
2049
2050 *section_name_end = c;
2051 }
2052
2053
2054 static void
2055 obj_coff_text ()
2056 {
2057 change_to_section (".text", 5, get_absolute_expression ());
2058 }
2059
2060
2061 static void
2062 obj_coff_data ()
2063 {
2064 change_to_section (".data", 5, get_absolute_expression ());
2065 }
2066
2067 static void
2068 obj_coff_bss()
2069 {
2070 if (*input_line_pointer == '\n') /* .bss */
2071 change_to_section(".bss",4, get_absolute_expression());
2072 else /* .bss id,expr */
2073 obj_coff_lcomm();
2074 }
2075
2076 static void
2077 obj_coff_ident()
2078 {
2079 segT current_seg = now_seg; /* save current seg */
2080 subsegT current_subseg = now_subseg;
2081 change_to_section (".comment", 8, 0); /* .comment seg */
2082 stringer (1); /* read string */
2083 subseg_new (current_seg, current_subseg); /* restore current seg */
2084 }
2085
2086 void
2087 c_symbol_merge (debug, normal)
2088 symbolS *debug;
2089 symbolS *normal;
2090 {
2091 S_SET_DATA_TYPE (normal, S_GET_DATA_TYPE (debug));
2092 S_SET_STORAGE_CLASS (normal, S_GET_STORAGE_CLASS (debug));
2093
2094 if (S_GET_NUMBER_AUXILIARY (debug) > S_GET_NUMBER_AUXILIARY (normal))
2095 {
2096 S_SET_NUMBER_AUXILIARY (normal, S_GET_NUMBER_AUXILIARY (debug));
2097 } /* take the most we have */
2098
2099 if (S_GET_NUMBER_AUXILIARY (debug) > 0)
2100 {
2101 memcpy ((char *) &normal->sy_symbol.ost_auxent[0], (char *) &debug->sy_symbol.ost_auxent[0], S_GET_NUMBER_AUXILIARY (debug) * AUXESZ);
2102 } /* Move all the auxiliary information */
2103
2104 /* Move the debug flags. */
2105 SF_SET_DEBUG_FIELD (normal, SF_GET_DEBUG_FIELD (debug));
2106 } /* c_symbol_merge() */
2107
2108 static int
2109 DEFUN (c_line_new, (symbol, paddr, line_number, frag),
2110 symbolS * symbol AND
2111 long paddr AND
2112 unsigned short line_number AND
2113 fragS * frag)
2114 {
2115 struct lineno_list *new_line =
2116 (struct lineno_list *) xmalloc (sizeof (struct lineno_list));
2117
2118 segment_info_type *s = segment_info + now_seg;
2119 new_line->line.l_lnno = line_number;
2120
2121 if (line_number == 0)
2122 {
2123 last_line_symbol = symbol;
2124 new_line->line.l_addr.l_symndx = (long) symbol;
2125 }
2126 else
2127 {
2128 new_line->line.l_addr.l_paddr = paddr;
2129 }
2130
2131 new_line->frag = (char *) frag;
2132 new_line->next = (struct lineno_list *) NULL;
2133
2134
2135 if (s->lineno_list_head == (struct lineno_list *) NULL)
2136 {
2137 s->lineno_list_head = new_line;
2138 }
2139 else
2140 {
2141 s->lineno_list_tail->next = new_line;
2142 }
2143 s->lineno_list_tail = new_line;
2144 return LINESZ * s->scnhdr.s_nlnno++;
2145 }
2146
2147 void
2148 c_dot_file_symbol (filename)
2149 char *filename;
2150 {
2151 symbolS *symbolP;
2152
2153 symbolP = symbol_new (".file",
2154 SEG_DEBUG,
2155 0,
2156 &zero_address_frag);
2157
2158 S_SET_STORAGE_CLASS (symbolP, C_FILE);
2159 S_SET_NUMBER_AUXILIARY (symbolP, 1);
2160 SA_SET_FILE_FNAME (symbolP, filename);
2161 #ifndef NO_LISTING
2162 {
2163 extern int listing;
2164 if (listing)
2165 {
2166 listing_source_file (filename);
2167 }
2168
2169 }
2170
2171 #endif
2172 SF_SET_DEBUG (symbolP);
2173 S_SET_VALUE (symbolP, (long) previous_file_symbol);
2174
2175 previous_file_symbol = symbolP;
2176
2177 /* Make sure that the symbol is first on the symbol chain */
2178 if (symbol_rootP != symbolP)
2179 {
2180 if (symbolP == symbol_lastP)
2181 {
2182 symbol_lastP = symbol_lastP->sy_previous;
2183 } /* if it was the last thing on the list */
2184
2185 symbol_remove (symbolP, &symbol_rootP, &symbol_lastP);
2186 symbol_insert (symbolP, symbol_rootP, &symbol_rootP, &symbol_lastP);
2187 symbol_rootP = symbolP;
2188 } /* if not first on the list */
2189
2190 } /* c_dot_file_symbol() */
2191
2192 /*
2193 * Build a 'section static' symbol.
2194 */
2195
2196 symbolS *
2197 c_section_symbol (name, idx)
2198 char *name;
2199 int idx;
2200 {
2201 symbolS *symbolP;
2202
2203 symbolP = symbol_new (name, idx,
2204 0,
2205 &zero_address_frag);
2206
2207 S_SET_STORAGE_CLASS (symbolP, C_STAT);
2208 S_SET_NUMBER_AUXILIARY (symbolP, 1);
2209
2210 SF_SET_STATICS (symbolP);
2211
2212 return symbolP;
2213 } /* c_section_symbol() */
2214
2215 static void
2216 DEFUN (w_symbols, (abfd, where, symbol_rootP),
2217 bfd * abfd AND
2218 char *where AND
2219 symbolS * symbol_rootP)
2220 {
2221 symbolS *symbolP;
2222 unsigned int i;
2223
2224 /* First fill in those values we have only just worked out */
2225 for (i = SEG_E0; i < SEG_E9; i++)
2226 {
2227 symbolP = segment_info[i].dot;
2228 if (symbolP)
2229 {
2230
2231 SA_SET_SCN_SCNLEN (symbolP, segment_info[i].scnhdr.s_size);
2232 SA_SET_SCN_NRELOC (symbolP, segment_info[i].scnhdr.s_nreloc);
2233 SA_SET_SCN_NLINNO (symbolP, segment_info[i].scnhdr.s_nlnno);
2234
2235 }
2236 }
2237
2238 /*
2239 * Emit all symbols left in the symbol chain.
2240 */
2241 for (symbolP = symbol_rootP; symbolP; symbolP = symbol_next (symbolP))
2242 {
2243 /* Used to save the offset of the name. It is used to point
2244 to the string in memory but must be a file offset. */
2245 register char *temp;
2246
2247 tc_coff_symbol_emit_hook (symbolP);
2248
2249 temp = S_GET_NAME (symbolP);
2250 if (SF_GET_STRING (symbolP))
2251 {
2252 S_SET_OFFSET (symbolP, symbolP->sy_name_offset);
2253 S_SET_ZEROES (symbolP, 0);
2254 }
2255 else
2256 {
2257 bzero (symbolP->sy_symbol.ost_entry.n_name, SYMNMLEN);
2258 strncpy (symbolP->sy_symbol.ost_entry.n_name, temp, SYMNMLEN);
2259 }
2260 where = symbol_to_chars (abfd, where, symbolP);
2261 S_SET_NAME (symbolP, temp);
2262 }
2263
2264 } /* w_symbols() */
2265
2266 static void
2267 DEFUN_VOID (obj_coff_lcomm)
2268 {
2269 char *name;
2270 char c;
2271 int temp;
2272 char *p;
2273
2274 symbolS *symbolP;
2275 name = input_line_pointer;
2276
2277 c = get_symbol_end ();
2278 p = input_line_pointer;
2279 *p = c;
2280 SKIP_WHITESPACE ();
2281 if (*input_line_pointer != ',')
2282 {
2283 as_bad ("Expected comma after name");
2284 ignore_rest_of_line ();
2285 return;
2286 }
2287 if (*input_line_pointer == '\n')
2288 {
2289 as_bad ("Missing size expression");
2290 return;
2291 }
2292 input_line_pointer++;
2293 if ((temp = get_absolute_expression ()) < 0)
2294 {
2295 as_warn ("lcomm length (%d.) <0! Ignored.", temp);
2296 ignore_rest_of_line ();
2297 return;
2298 }
2299 *p = 0;
2300
2301 symbolP = symbol_find_or_make(name);
2302
2303 if (S_GET_SEGMENT(symbolP) == SEG_UNKNOWN &&
2304 S_GET_VALUE(symbolP) == 0)
2305 {
2306 if (! need_pass_2)
2307 {
2308 char *p;
2309 segT current_seg = now_seg; /* save current seg */
2310 subsegT current_subseg = now_subseg;
2311
2312 subseg_new (SEG_E2, 1);
2313 symbolP->sy_frag = frag_now;
2314 p = frag_var(rs_org, 1, 1, (relax_substateT)0, symbolP,
2315 temp, (char *)0);
2316 *p = 0;
2317 subseg_new (current_seg, current_subseg); /* restore current seg */
2318 S_SET_SEGMENT(symbolP, SEG_E2);
2319 S_SET_STORAGE_CLASS(symbolP, C_STAT);
2320 }
2321 }
2322 else
2323 as_bad("Symbol %s already defined", name);
2324
2325 demand_empty_rest_of_line();
2326 }
2327
2328 static void
2329 DEFUN (fixup_mdeps, (frags, h, this_segment),
2330 fragS * frags AND
2331 object_headers * h AND
2332 segT this_segment)
2333 {
2334 subseg_change (this_segment, 0);
2335 while (frags)
2336 {
2337 switch (frags->fr_type)
2338 {
2339 case rs_align:
2340 case rs_org:
2341 frags->fr_type = rs_fill;
2342 frags->fr_offset =
2343 (frags->fr_next->fr_address - frags->fr_address - frags->fr_fix);
2344 break;
2345 case rs_machine_dependent:
2346 md_convert_frag (h, frags);
2347 frag_wane (frags);
2348 break;
2349 default:
2350 ;
2351 }
2352 frags = frags->fr_next;
2353 }
2354 }
2355
2356 #if 1
2357 static void
2358 DEFUN (fixup_segment, (segP, this_segment_type),
2359 segment_info_type * segP AND
2360 segT this_segment_type)
2361 {
2362 register fixS * fixP;
2363 register symbolS *add_symbolP;
2364 register symbolS *sub_symbolP;
2365 register long add_number;
2366 register int size;
2367 register char *place;
2368 register long where;
2369 register char pcrel;
2370 register fragS *fragP;
2371 register segT add_symbol_segment = SEG_ABSOLUTE;
2372
2373
2374 for (fixP = segP->fix_root; fixP; fixP = fixP->fx_next)
2375 {
2376 fragP = fixP->fx_frag;
2377 know (fragP);
2378 where = fixP->fx_where;
2379 place = fragP->fr_literal + where;
2380 size = fixP->fx_size;
2381 add_symbolP = fixP->fx_addsy;
2382 #ifdef TC_I960
2383 if (fixP->fx_callj && TC_S_IS_CALLNAME (add_symbolP))
2384 {
2385 /* Relocation should be done via the
2386 associated 'bal' entry point
2387 symbol. */
2388
2389 if (!TC_S_IS_BALNAME (tc_get_bal_of_call (add_symbolP)))
2390 {
2391 as_bad ("No 'bal' entry point for leafproc %s",
2392 S_GET_NAME (add_symbolP));
2393 continue;
2394 }
2395 fixP->fx_addsy = add_symbolP = tc_get_bal_of_call (add_symbolP);
2396 } /* callj relocation */
2397 #endif
2398 sub_symbolP = fixP->fx_subsy;
2399 add_number = fixP->fx_offset;
2400 pcrel = fixP->fx_pcrel;
2401
2402 if (add_symbolP)
2403 {
2404 add_symbol_segment = S_GET_SEGMENT (add_symbolP);
2405 } /* if there is an addend */
2406
2407 if (sub_symbolP)
2408 {
2409 if (!add_symbolP)
2410 {
2411 /* Its just -sym */
2412 if (S_GET_SEGMENT (sub_symbolP) != SEG_ABSOLUTE)
2413 {
2414 as_bad ("Negative of non-absolute symbol %s", S_GET_NAME (sub_symbolP));
2415 } /* not absolute */
2416
2417 add_number -= S_GET_VALUE (sub_symbolP);
2418 fixP->fx_subsy = 0;
2419
2420 /* if sub_symbol is in the same segment that add_symbol
2421 and add_symbol is either in DATA, TEXT, BSS or ABSOLUTE */
2422 }
2423 else if ((S_GET_SEGMENT (sub_symbolP) == add_symbol_segment)
2424 && (SEG_NORMAL (add_symbol_segment)
2425 || (add_symbol_segment == SEG_ABSOLUTE)))
2426 {
2427 /* Difference of 2 symbols from same segment. */
2428 /* Can't make difference of 2 undefineds: 'value' means */
2429 /* something different for N_UNDF. */
2430 #ifdef TC_I960
2431 /* Makes no sense to use the difference of 2 arbitrary symbols
2432 as the target of a call instruction. */
2433 if (fixP->fx_callj)
2434 {
2435 as_bad ("callj to difference of 2 symbols");
2436 }
2437 #endif /* TC_I960 */
2438 add_number += S_GET_VALUE (add_symbolP) -
2439 S_GET_VALUE (sub_symbolP);
2440
2441 add_symbolP = NULL;
2442 fixP->fx_addsy = NULL;
2443 }
2444 else
2445 {
2446 /* Different segments in subtraction. */
2447 know (!(S_IS_EXTERNAL (sub_symbolP) && (S_GET_SEGMENT (sub_symbolP) == SEG_ABSOLUTE)));
2448
2449 if ((S_GET_SEGMENT (sub_symbolP) == SEG_ABSOLUTE))
2450 {
2451 add_number -= S_GET_VALUE (sub_symbolP);
2452 }
2453 else
2454 {
2455 as_bad ("Can't emit reloc {- %s-seg symbol \"%s\"} @ file address %d.",
2456 segment_name (S_GET_SEGMENT (sub_symbolP)),
2457 S_GET_NAME (sub_symbolP), fragP->fr_address + where);
2458 } /* if absolute */
2459 }
2460 } /* if sub_symbolP */
2461
2462 if (add_symbolP)
2463 {
2464 if (add_symbol_segment == this_segment_type && pcrel)
2465 {
2466 /*
2467 * This fixup was made when the symbol's segment was
2468 * SEG_UNKNOWN, but it is now in the local segment.
2469 * So we know how to do the address without relocation.
2470 */
2471 #ifdef TC_I960
2472 /* reloc_callj() may replace a 'call' with a 'calls' or a 'bal',
2473 * in which cases it modifies *fixP as appropriate. In the case
2474 * of a 'calls', no further work is required, and *fixP has been
2475 * set up to make the rest of the code below a no-op.
2476 */
2477 reloc_callj (fixP);
2478 #endif /* TC_I960 */
2479
2480 add_number += S_GET_VALUE (add_symbolP);
2481 add_number -= md_pcrel_from (fixP);
2482 #ifdef TC_I386
2483 /* On the 386 we must adjust by the segment
2484 vaddr as well. Ian Taylor. */
2485 add_number -= segP->scnhdr.s_vaddr;
2486 #endif
2487 pcrel = 0; /* Lie. Don't want further pcrel processing. */
2488 fixP->fx_addsy = NULL; /* No relocations please. */
2489 }
2490 else
2491 {
2492 switch (add_symbol_segment)
2493 {
2494 case SEG_ABSOLUTE:
2495 #ifdef TC_I960
2496 reloc_callj (fixP); /* See comment about reloc_callj() above*/
2497 #endif /* TC_I960 */
2498 add_number += S_GET_VALUE (add_symbolP);
2499 fixP->fx_addsy = NULL;
2500 add_symbolP = NULL;
2501 break;
2502 default:
2503
2504 add_number += S_GET_VALUE (add_symbolP) +
2505 segment_info[S_GET_SEGMENT (add_symbolP)].scnhdr.s_paddr;
2506 break;
2507
2508 case SEG_UNKNOWN:
2509 #ifdef TC_I960
2510 if ((int) fixP->fx_bit_fixP == 13)
2511 {
2512 /* This is a COBR instruction. They have only a
2513 * 13-bit displacement and are only to be used
2514 * for local branches: flag as error, don't generate
2515 * relocation.
2516 */
2517 as_bad ("can't use COBR format with external label");
2518 fixP->fx_addsy = NULL; /* No relocations please. */
2519 continue;
2520 } /* COBR */
2521 #endif /* TC_I960 */
2522 #ifdef TC_I386
2523 /* 386 COFF uses a peculiar format in
2524 which the value of a common symbol is
2525 stored in the .text segment (I've
2526 checked this on SVR3.2 and SCO 3.2.2)
2527 Ian Taylor <ian@cygnus.com>. */
2528 if (S_IS_COMMON (add_symbolP))
2529 add_number += S_GET_VALUE (add_symbolP);
2530 #endif
2531 break;
2532
2533
2534 } /* switch on symbol seg */
2535 } /* if not in local seg */
2536 } /* if there was a + symbol */
2537
2538 if (pcrel)
2539 {
2540 add_number -= md_pcrel_from (fixP);
2541 if (add_symbolP == 0)
2542 {
2543 fixP->fx_addsy = &abs_symbol;
2544 } /* if there's an add_symbol */
2545 #ifdef TC_I386
2546 /* On the 386 we must adjust by the segment vaddr
2547 as well. Ian Taylor. */
2548 add_number -= segP->scnhdr.s_vaddr;
2549 #endif
2550 } /* if pcrel */
2551
2552 if (!fixP->fx_bit_fixP)
2553 {
2554 if ((size == 1 &&
2555 (add_number & ~0xFF) && ((add_number & ~0xFF) != (-1 & ~0xFF))) ||
2556 (size == 2 &&
2557 (add_number & ~0xFFFF) && ((add_number & ~0xFFFF) != (-1 & ~0xFFFF))))
2558 {
2559 as_bad ("Value of %d too large for field of %d bytes at 0x%x",
2560 add_number, size, fragP->fr_address + where);
2561 } /* generic error checking */
2562 #ifdef WARN_SIGNED_OVERFLOW_WORD
2563 /* Warn if a .word value is too large when treated as
2564 a signed number. We already know it is not too
2565 negative. This is to catch over-large switches
2566 generated by gcc on the 68k. */
2567 if (!flagseen['J']
2568 && size == 2
2569 && add_number > 0x7fff)
2570 as_bad ("Signed .word overflow; switch may be too large; %d at 0x%x",
2571 add_number, fragP->fr_address + where);
2572 #endif
2573 } /* not a bit fix */
2574 /* once this fix has been applied, we don't have to output anything
2575 nothing more need be done -*/
2576 md_apply_fix (fixP, add_number);
2577 } /* For each fixS in this segment. */
2578 } /* fixup_segment() */
2579
2580 #endif