Commit | Line | Data |
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fecd2382 | 1 | /* write.c - emit .o file |
43ca9aa6 | 2 | Copyright (C) 1986, 1987, 1990, 1991, 1992, 1993 Free Software Foundation, Inc. |
6efd877d | 3 | |
a39116f1 | 4 | This file is part of GAS, the GNU Assembler. |
6efd877d | 5 | |
a39116f1 RP |
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. | |
6efd877d | 10 | |
a39116f1 RP |
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. | |
6efd877d | 15 | |
a39116f1 RP |
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. */ | |
fecd2382 | 19 | |
c593cf41 | 20 | /* This thing should be set up to do byteordering correctly. But... */ |
fecd2382 RP |
21 | |
22 | #include "as.h" | |
fecd2382 RP |
23 | #include "subsegs.h" |
24 | #include "obstack.h" | |
25 | #include "output-file.h" | |
26 | ||
43ca9aa6 KR |
27 | /* The NOP_OPCODE is for the alignment fill value. Fill it with a nop |
28 | instruction so that the disassembler does not choke on it. */ | |
6d5460ab RP |
29 | #ifndef NOP_OPCODE |
30 | #define NOP_OPCODE 0x00 | |
31 | #endif | |
32 | ||
43ca9aa6 KR |
33 | #ifndef WORKING_DOT_WORD |
34 | extern CONST int md_short_jump_size; | |
35 | extern CONST int md_long_jump_size; | |
36 | #endif | |
37 | ||
38 | #ifndef BFD_ASSEMBLER | |
39 | ||
45432836 | 40 | #ifndef MANY_SEGMENTS |
09952cd9 KR |
41 | struct frag *text_frag_root; |
42 | struct frag *data_frag_root; | |
43 | struct frag *bss_frag_root; | |
fecd2382 | 44 | |
09952cd9 KR |
45 | struct frag *text_last_frag; /* Last frag in segment. */ |
46 | struct frag *data_last_frag; /* Last frag in segment. */ | |
65bfcf2e | 47 | static struct frag *bss_last_frag; /* Last frag in segment. */ |
45432836 | 48 | #endif |
fecd2382 RP |
49 | |
50 | static object_headers headers; | |
fecd2382 | 51 | long string_byte_count; |
fecd2382 | 52 | static char *the_object_file; |
fecd2382 RP |
53 | char *next_object_file_charP; /* Tracks object file bytes. */ |
54 | ||
3eb802b5 | 55 | #ifndef OBJ_VMS |
fecd2382 | 56 | int magic_number_for_object_file = DEFAULT_MAGIC_NUMBER_FOR_OBJECT_FILE; |
3eb802b5 | 57 | #endif |
fecd2382 | 58 | |
43ca9aa6 KR |
59 | #endif /* BFD_ASSEMBLER */ |
60 | ||
6efd877d | 61 | static long fixup_segment PARAMS ((fixS * fixP, segT this_segment_type)); |
d5364748 | 62 | static relax_addressT relax_align PARAMS ((relax_addressT addr, int align)); |
6efd877d | 63 | void relax_segment PARAMS ((struct frag * seg_frag_root, segT seg_type)); |
fecd2382 RP |
64 | |
65 | /* | |
66 | * fix_new() | |
67 | * | |
68 | * Create a fixS in obstack 'notes'. | |
69 | */ | |
6efd877d KR |
70 | fixS * |
71 | fix_new (frag, where, size, add_symbol, sub_symbol, offset, pcrel, r_type) | |
72 | fragS *frag; /* Which frag? */ | |
73 | int where; /* Where in that frag? */ | |
74 | short int size; /* 1, 2, or 4 usually. */ | |
75 | symbolS *add_symbol; /* X_add_symbol. */ | |
76 | symbolS *sub_symbol; /* X_subtract_symbol. */ | |
d5364748 | 77 | offsetT offset; /* X_add_number. */ |
6efd877d | 78 | int pcrel; /* TRUE if PC-relative relocation. */ |
43ca9aa6 KR |
79 | #ifdef BFD_ASSEMBLER |
80 | bfd_reloc_code_real_type r_type; /* Relocation type */ | |
81 | #else | |
6efd877d | 82 | int r_type; /* Relocation type */ |
43ca9aa6 | 83 | #endif |
fecd2382 | 84 | { |
6efd877d KR |
85 | fixS *fixP; |
86 | ||
87 | fixP = (fixS *) obstack_alloc (¬es, sizeof (fixS)); | |
88 | ||
89 | fixP->fx_frag = frag; | |
90 | fixP->fx_where = where; | |
91 | fixP->fx_size = size; | |
92 | fixP->fx_addsy = add_symbol; | |
93 | fixP->fx_subsy = sub_symbol; | |
94 | fixP->fx_offset = offset; | |
95 | fixP->fx_pcrel = pcrel; | |
43ca9aa6 | 96 | #if defined(NEED_FX_R_TYPE) || defined (BFD_ASSEMBLER) |
6efd877d | 97 | fixP->fx_r_type = r_type; |
c593cf41 | 98 | #endif |
6efd877d KR |
99 | fixP->fx_im_disp = 0; |
100 | fixP->fx_pcrel_adjust = 0; | |
6efd877d | 101 | fixP->fx_bit_fixP = 0; |
43ca9aa6 KR |
102 | fixP->fx_addnumber = 0; |
103 | ||
104 | #ifdef TC_something | |
105 | fixP->fx_bsr = 0; | |
106 | #endif | |
107 | #ifdef TC_I960 | |
108 | fixP->fx_callj = 0; | |
109 | #endif | |
110 | ||
111 | /* Usually, we want relocs sorted numerically, but while | |
112 | comparing to older versions of gas that have relocs | |
113 | reverse sorted, it is convenient to have this compile | |
114 | time option. xoxorich. */ | |
115 | ||
116 | { | |
6efd877d | 117 | |
43ca9aa6 KR |
118 | #ifdef BFD_ASSEMBLER |
119 | fixS **seg_fix_rootP = & (seg_info (now_seg)->fix_root); | |
120 | fixS **seg_fix_tailP = & (seg_info (now_seg)->fix_tail); | |
121 | #endif | |
09952cd9 | 122 | |
f6e504fe | 123 | #ifdef REVERSE_SORT_RELOCS |
6efd877d | 124 | |
43ca9aa6 KR |
125 | fixP->fx_next = *seg_fix_rootP; |
126 | *seg_fix_rootP = fixP; | |
6efd877d | 127 | |
f6e504fe | 128 | #else /* REVERSE_SORT_RELOCS */ |
6efd877d | 129 | |
43ca9aa6 | 130 | fixP->fx_next = NULL; |
6efd877d | 131 | |
43ca9aa6 KR |
132 | if (*seg_fix_tailP) |
133 | (*seg_fix_tailP)->fx_next = fixP; | |
134 | else | |
135 | *seg_fix_rootP = fixP; | |
136 | *seg_fix_tailP = fixP; | |
6efd877d | 137 | |
f6e504fe | 138 | #endif /* REVERSE_SORT_RELOCS */ |
6efd877d | 139 | |
43ca9aa6 KR |
140 | } |
141 | ||
142 | return fixP; | |
143 | } | |
144 | ||
145 | /* Append a string onto another string, bumping the pointer along. */ | |
146 | void | |
147 | append (charPP, fromP, length) | |
148 | char **charPP; | |
149 | char *fromP; | |
150 | unsigned long length; | |
151 | { | |
152 | /* Don't trust memcpy() of 0 chars. */ | |
153 | if (length == 0) | |
154 | return; | |
155 | ||
156 | memcpy (*charPP, fromP, (int) length); | |
157 | *charPP += length; | |
158 | } | |
159 | ||
160 | #ifndef BFD_ASSEMBLER | |
161 | int section_alignment[SEG_MAXIMUM_ORDINAL]; | |
162 | #endif | |
163 | ||
164 | /* | |
165 | * This routine records the largest alignment seen for each segment. | |
166 | * If the beginning of the segment is aligned on the worst-case | |
167 | * boundary, all of the other alignments within it will work. At | |
168 | * least one object format really uses this info. | |
169 | */ | |
170 | void | |
171 | record_alignment (seg, align) | |
172 | /* Segment to which alignment pertains */ | |
173 | segT seg; | |
174 | /* Alignment, as a power of 2 (e.g., 1 => 2-byte boundary, 2 => 4-byte | |
175 | boundary, etc.) */ | |
176 | int align; | |
177 | { | |
178 | #ifdef BFD_ASSEMBLER | |
179 | if (align > bfd_get_section_alignment (stdoutput, seg)) | |
180 | bfd_set_section_alignment (stdoutput, seg, align); | |
181 | #else | |
182 | if (align > section_alignment[(int) seg]) | |
183 | section_alignment[(int) seg] = align; | |
184 | #endif | |
185 | } | |
186 | ||
187 | #if defined (BFD_ASSEMBLER) || ! defined (BFD) | |
188 | ||
189 | static fragS * | |
190 | chain_frchains_together_1 (section, frchp) | |
191 | segT section; | |
192 | struct frchain *frchp; | |
193 | { | |
194 | fragS dummy, *prev_frag = &dummy; | |
195 | for (; frchp && frchp->frch_seg == section; frchp = frchp->frch_next) | |
196 | { | |
197 | prev_frag->fr_next = frchp->frch_root; | |
198 | prev_frag = frchp->frch_last; | |
199 | } | |
200 | prev_frag->fr_next = 0; | |
201 | return prev_frag; | |
202 | } | |
203 | ||
204 | #endif | |
205 | ||
206 | #ifdef BFD_ASSEMBLER | |
207 | ||
208 | static void | |
209 | chain_frchains_together (abfd, section, xxx) | |
210 | bfd *abfd; /* unused */ | |
211 | segT section; | |
212 | char *xxx; /* unused */ | |
213 | { | |
f2f7d044 ILT |
214 | segment_info_type *info; |
215 | ||
216 | /* BFD may have introduced its own sections without using | |
217 | subseg_new, so it is possible that seg_info is NULL. */ | |
218 | info = seg_info (section); | |
219 | if (info != (segment_info_type *) NULL) | |
220 | chain_frchains_together_1 (section, info->frchainP); | |
43ca9aa6 KR |
221 | } |
222 | ||
223 | #endif | |
542e1629 | 224 | |
d5364748 | 225 | #if !defined (BFD) && !defined (BFD_ASSEMBLER) |
65bfcf2e | 226 | |
6efd877d KR |
227 | void |
228 | remove_subsegs (head, seg, root, last) | |
229 | frchainS *head; | |
230 | int seg; | |
231 | fragS **root; | |
232 | fragS **last; | |
65bfcf2e | 233 | { |
65bfcf2e | 234 | *root = head->frch_root; |
43ca9aa6 KR |
235 | *last = chain_frchains_together_1 (seg, head); |
236 | } | |
237 | ||
238 | #endif /* BFD */ | |
239 | ||
43ca9aa6 KR |
240 | static void |
241 | cvt_frag_to_fill (x, fragP) | |
242 | #ifdef BFD_ASSEMBLER | |
243 | segT x; | |
244 | #else | |
245 | object_headers *x; | |
246 | #endif | |
247 | fragS *fragP; | |
248 | { | |
249 | #ifdef BFD_ASSEMBLER | |
250 | segT sec = x; | |
251 | #else | |
252 | object_headers *headers = x; | |
253 | #endif | |
254 | ||
255 | switch (fragP->fr_type) | |
6efd877d | 256 | { |
43ca9aa6 KR |
257 | case rs_align: |
258 | case rs_org: | |
259 | #ifdef HANDLE_ALIGN | |
260 | HANDLE_ALIGN (fragP); | |
261 | #endif | |
262 | fragP->fr_type = rs_fill; | |
263 | know (fragP->fr_var == 1); | |
264 | know (fragP->fr_next != NULL); | |
265 | ||
266 | fragP->fr_offset = (fragP->fr_next->fr_address | |
267 | - fragP->fr_address | |
268 | - fragP->fr_fix); | |
269 | break; | |
65bfcf2e | 270 | |
43ca9aa6 KR |
271 | case rs_fill: |
272 | break; | |
273 | ||
274 | case rs_machine_dependent: | |
275 | #ifdef BFD_ASSEMBLER | |
276 | md_convert_frag (stdoutput, sec, fragP); | |
277 | #else | |
278 | md_convert_frag (headers, fragP); | |
279 | #endif | |
280 | ||
d5364748 | 281 | assert (fragP->fr_next == NULL || (fragP->fr_next->fr_address - fragP->fr_address == fragP->fr_fix)); |
43ca9aa6 KR |
282 | |
283 | /* | |
284 | * After md_convert_frag, we make the frag into a ".space 0". | |
285 | * Md_convert_frag() should set up any fixSs and constants | |
286 | * required. | |
287 | */ | |
288 | frag_wane (fragP); | |
289 | break; | |
290 | ||
291 | #ifndef WORKING_DOT_WORD | |
292 | case rs_broken_word: | |
293 | { | |
294 | struct broken_word *lie; | |
295 | ||
296 | if (fragP->fr_subtype) | |
297 | { | |
298 | fragP->fr_fix += md_short_jump_size; | |
299 | for (lie = (struct broken_word *) (fragP->fr_symbol); | |
300 | lie && lie->dispfrag == fragP; | |
301 | lie = lie->next_broken_word) | |
302 | if (lie->added == 1) | |
303 | fragP->fr_fix += md_long_jump_size; | |
304 | } | |
305 | frag_wane (fragP); | |
306 | } | |
307 | break; | |
308 | #endif | |
309 | ||
310 | default: | |
311 | BAD_CASE (fragP->fr_type); | |
312 | break; | |
6efd877d | 313 | } |
65bfcf2e | 314 | } |
6efd877d | 315 | |
43ca9aa6 KR |
316 | #ifdef BFD_ASSEMBLER |
317 | static void | |
318 | relax_and_size_seg (abfd, sec, xxx) | |
319 | bfd *abfd; | |
320 | asection *sec; | |
321 | char *xxx; | |
322 | { | |
323 | flagword flags; | |
324 | ||
325 | flags = bfd_get_section_flags (abfd, sec); | |
326 | ||
d5364748 | 327 | if (/*flags & SEC_ALLOC*/ 1) |
43ca9aa6 KR |
328 | { |
329 | fragS *fragp; | |
330 | segment_info_type *seginfo; | |
331 | int x; | |
d5364748 | 332 | valueT size, newsize; |
43ca9aa6 KR |
333 | |
334 | seginfo = (segment_info_type *) bfd_get_section_userdata (abfd, sec); | |
d5364748 KR |
335 | if (seginfo && seginfo->frchainP) |
336 | { | |
337 | relax_segment (seginfo->frchainP->frch_root, sec); | |
338 | for (fragp = seginfo->frchainP->frch_root; fragp; fragp = fragp->fr_next) | |
339 | cvt_frag_to_fill (sec, fragp); | |
340 | for (fragp = seginfo->frchainP->frch_root; | |
341 | fragp->fr_next; | |
342 | fragp = fragp->fr_next) | |
343 | /* walk to last elt */; | |
344 | size = fragp->fr_address + fragp->fr_fix; | |
345 | } | |
346 | else | |
347 | size = 0; | |
43ca9aa6 KR |
348 | if (size > 0) |
349 | { | |
350 | flags |= SEC_HAS_CONTENTS; | |
351 | /* @@ This is just an approximation. */ | |
352 | if (seginfo->fix_root) | |
353 | flags |= SEC_RELOC; | |
d5364748 KR |
354 | else |
355 | flags &= ~SEC_RELOC; | |
43ca9aa6 KR |
356 | x = bfd_set_section_flags (abfd, sec, flags); |
357 | assert (x == true); | |
358 | } | |
359 | size = md_section_align (sec, size); | |
360 | x = bfd_set_section_size (abfd, sec, size); | |
361 | assert (x == true); | |
362 | ||
363 | /* If the size had to be rounded up, add some padding in the last | |
364 | non-empty frag. */ | |
365 | newsize = bfd_get_section_size_before_reloc (sec); | |
366 | assert (newsize >= size); | |
367 | if (size != newsize) | |
368 | { | |
369 | fragS *last = seginfo->frchainP->frch_last; | |
370 | fragp = seginfo->frchainP->frch_root; | |
371 | while (fragp->fr_next != last) | |
372 | fragp = fragp->fr_next; | |
373 | last->fr_address = size; | |
374 | fragp->fr_offset += newsize - size; | |
375 | } | |
376 | } | |
377 | #ifdef tc_frob_section | |
378 | tc_frob_section (sec); | |
379 | #endif | |
380 | #ifdef obj_frob_section | |
381 | obj_frob_section (sec); | |
382 | #endif | |
383 | } | |
384 | ||
d5364748 KR |
385 | #ifdef DEBUG2 |
386 | static void | |
387 | dump_section_relocs (abfd, sec, stream_) | |
388 | bfd *abfd; | |
389 | asection *sec; | |
390 | char *stream_; | |
391 | { | |
392 | FILE *stream = (FILE *) stream_; | |
393 | segment_info_type *seginfo = seg_info (sec); | |
394 | fixS *fixp = seginfo->fix_root; | |
395 | ||
396 | if (!fixp) | |
397 | return; | |
398 | ||
399 | fprintf (stream, "sec %s relocs:\n", sec->name); | |
400 | while (fixp) | |
401 | { | |
402 | symbolS *s = fixp->fx_addsy; | |
403 | if (s) | |
404 | fprintf (stream, " %08x: %s(%s+%x)+%x\n", fixp, | |
405 | S_GET_NAME (s), s->bsym->section->name, | |
406 | S_GET_VALUE (s), fixp->fx_offset); | |
407 | else | |
408 | fprintf (stream, " %08x: type %d no sym\n", fixp, fixp->fx_r_type); | |
409 | fixp = fixp->fx_next; | |
410 | } | |
411 | } | |
412 | #else | |
413 | #define dump_section_relocs(ABFD,SEC,STREAM) (void)(ABFD,SEC,STREAM) | |
414 | #endif | |
415 | ||
416 | static void | |
417 | adjust_reloc_syms (abfd, sec, xxx) | |
418 | bfd *abfd; | |
419 | asection *sec; | |
420 | char *xxx; | |
421 | { | |
422 | segment_info_type *seginfo = seg_info (sec); | |
423 | fixS *fixp; | |
424 | ||
425 | if (seginfo == NULL) | |
426 | return; | |
427 | ||
428 | dump_section_relocs (abfd, sec, stderr); | |
429 | ||
430 | for (fixp = seginfo->fix_root; fixp; fixp = fixp->fx_next) | |
431 | if (fixp->fx_addsy) | |
432 | { | |
433 | symbolS *sym = fixp->fx_addsy; | |
434 | asection *symsec = sym->bsym->section; | |
435 | segment_info_type *symseginfo = seg_info (symsec); | |
436 | ||
437 | /* If it's one of these sections, assume the symbol is definitely | |
438 | going to be output. */ | |
439 | if (symsec == &bfd_und_section | |
440 | || symsec == &bfd_abs_section | |
441 | || bfd_is_com_section (symsec)) | |
442 | continue; | |
443 | ||
444 | /* Since we're reducing to section symbols, don't attempt to reduce | |
445 | anything that's already using one. */ | |
446 | if (sym->bsym == symsec->symbol) | |
447 | continue; | |
448 | ||
449 | /* Is there some other reason we can't adjust this one? (E.g., | |
450 | call/bal links in i960-bout symbols.) */ | |
451 | #ifdef obj_fix_adjustable | |
452 | if (! obj_fix_adjustable (fixp)) | |
453 | continue; | |
454 | #endif | |
455 | /* If the section symbol isn't going to be output, the relocs | |
456 | at least should still work. If not, figure out what to do | |
457 | when we run into that case. */ | |
458 | fixp->fx_offset += S_GET_VALUE (sym); | |
459 | if (sym->sy_frag) | |
460 | fixp->fx_offset += sym->sy_frag->fr_address; | |
461 | if (symseginfo->sym) | |
462 | fixp->fx_addsy = symseginfo->sym; | |
463 | else | |
464 | { | |
465 | fixp->fx_addsy = symbol_find (symsec->name); | |
466 | if (!fixp->fx_addsy) | |
467 | { | |
468 | fixp->fx_addsy = symbol_make (symsec->name); | |
469 | fixp->fx_addsy->bsym = symsec->symbol; | |
470 | } | |
471 | symseginfo->sym = fixp->fx_addsy; | |
472 | } | |
473 | } | |
474 | ||
475 | dump_section_relocs (abfd, sec, stderr); | |
476 | } | |
477 | ||
43ca9aa6 KR |
478 | static void |
479 | write_contents (abfd, sec, xxx) | |
480 | bfd *abfd; | |
481 | asection *sec; | |
482 | char *xxx; | |
483 | { | |
484 | segment_info_type *seginfo = seg_info (sec); | |
485 | unsigned long offset = 0; | |
486 | fragS *frags; | |
487 | int i, n; | |
488 | arelent **relocs; | |
489 | fixS *fixp; | |
490 | ||
d5364748 KR |
491 | /* If seginfo is NULL, we did not create this section; don't do |
492 | anything with it. */ | |
493 | if (seginfo == NULL) | |
43ca9aa6 KR |
494 | return; |
495 | ||
496 | fixup_segment (seginfo->fix_root, sec); | |
497 | ||
3d3c5039 | 498 | n = 0; |
d5364748 KR |
499 | for (fixp = seginfo->fix_root; fixp; fixp = fixp->fx_next) |
500 | n++; | |
43ca9aa6 | 501 | |
d5364748 | 502 | #ifndef RELOC_EXPANSION_POSSIBLE |
43ca9aa6 | 503 | /* Set up reloc information as well. */ |
43ca9aa6 KR |
504 | relocs = (arelent **) bfd_alloc_by_size_t (stdoutput, |
505 | n * sizeof (arelent *)); | |
d5364748 | 506 | bzero ((char*)relocs, n * sizeof (arelent*)); |
43ca9aa6 | 507 | |
3d3c5039 ILT |
508 | i = 0; |
509 | for (fixp = seginfo->fix_root; fixp != (fixS *) NULL; fixp = fixp->fx_next) | |
510 | { | |
511 | arelent *reloc; | |
512 | extern arelent *tc_gen_reloc (); | |
513 | char *data; | |
514 | bfd_reloc_status_type s; | |
515 | ||
516 | if (fixp->fx_addsy == 0) | |
517 | { | |
518 | /* @@ Need some other flag to indicate which have already | |
519 | been performed... */ | |
520 | n--; | |
521 | continue; | |
522 | } | |
523 | reloc = tc_gen_reloc (sec, fixp); | |
524 | if (!reloc) | |
525 | { | |
526 | n--; | |
527 | continue; | |
528 | } | |
529 | data = fixp->fx_frag->fr_literal + fixp->fx_where; | |
530 | if (fixp->fx_where + 4 | |
531 | > fixp->fx_frag->fr_fix + fixp->fx_frag->fr_offset) | |
532 | abort (); | |
d5364748 KR |
533 | /* Pass bogus address so that when bfd_perform_relocation adds |
534 | `address' back in, it'll come up with `data', which is where | |
535 | we want it to operate. */ | |
3d3c5039 ILT |
536 | s = bfd_perform_relocation (stdoutput, reloc, data - reloc->address, |
537 | sec, stdoutput); | |
538 | switch (s) | |
539 | { | |
540 | case bfd_reloc_ok: | |
541 | break; | |
542 | default: | |
543 | as_fatal ("bad return from bfd_perform_relocation"); | |
544 | } | |
545 | relocs[i++] = reloc; | |
546 | } | |
d5364748 KR |
547 | #else |
548 | n = n * MAX_RELOC_EXPANSION; | |
549 | /* Set up reloc information as well. */ | |
550 | relocs = (arelent **) bfd_alloc_by_size_t (stdoutput, | |
551 | n * sizeof (arelent *)); | |
552 | ||
553 | i = 0; | |
554 | for (fixp = seginfo->fix_root; fixp != (fixS *) NULL; fixp = fixp->fx_next) | |
555 | { | |
556 | arelent **reloc; | |
557 | extern arelent *tc_gen_reloc (); | |
558 | char *data; | |
559 | bfd_reloc_status_type s; | |
560 | int j; | |
561 | ||
562 | if (fixp->fx_addsy == 0) | |
563 | { | |
564 | /* @@ Need some other flag to indicate which have already | |
565 | been performed... */ | |
566 | n--; | |
567 | continue; | |
568 | } | |
569 | reloc = tc_gen_reloc (sec, fixp); | |
570 | ||
571 | for (j = 0; reloc[j]; j++) | |
572 | { | |
573 | relocs[i++] = reloc[j]; | |
574 | assert(i <= n); | |
575 | } | |
576 | data = fixp->fx_frag->fr_literal + fixp->fx_where; | |
577 | if (fixp->fx_where + 4 | |
578 | > fixp->fx_frag->fr_fix + fixp->fx_frag->fr_offset) | |
579 | abort (); | |
580 | for (j = 0; reloc[j]; j++) | |
581 | { | |
582 | s = bfd_perform_relocation (stdoutput, reloc[j], data - reloc[j]->address, | |
583 | sec, stdoutput); | |
584 | switch (s) | |
585 | { | |
586 | case bfd_reloc_ok: | |
587 | break; | |
588 | default: | |
589 | as_fatal ("bad return from bfd_perform_relocation"); | |
590 | } | |
591 | } | |
592 | } | |
593 | n = i; | |
594 | #endif | |
595 | ||
3d3c5039 ILT |
596 | if (n) |
597 | bfd_set_reloc (stdoutput, sec, relocs, n); | |
d5364748 KR |
598 | else |
599 | bfd_set_section_flags (abfd, sec, | |
600 | bfd_get_section_flags (abfd, sec) & ~SEC_RELOC); | |
601 | #ifdef DEBUG2 | |
602 | { | |
603 | int i; | |
604 | arelent *r; | |
605 | asymbol *s; | |
606 | fprintf (stderr, "relocs for sec %s\n", sec->name); | |
607 | for (i = 0; i < n; i++) | |
608 | { | |
609 | r = relocs[i]; | |
610 | s = *r->sym_ptr_ptr; | |
611 | fprintf (stderr, " reloc %2d @%08x off %4x : sym %-10s addend %x\n", | |
612 | i, r, r->address, s->name, r->addend); | |
613 | } | |
614 | } | |
615 | #endif | |
616 | ||
617 | /* Force calculations (size, vma) to get done. */ | |
618 | bfd_set_section_contents (stdoutput, sec, "", 0, (addressT) 0); | |
3d3c5039 ILT |
619 | |
620 | /* Write out the frags. */ | |
d5364748 KR |
621 | if (! (bfd_get_section_flags (abfd, sec) & SEC_HAS_CONTENTS)) |
622 | return; | |
623 | ||
3d3c5039 | 624 | for (frags = seginfo->frchainP->frch_root; |
43ca9aa6 KR |
625 | frags; |
626 | frags = frags->fr_next) | |
627 | { | |
628 | int x; | |
629 | unsigned long fill_size; | |
630 | char *fill_literal; | |
631 | long count; | |
632 | ||
633 | assert (frags->fr_type == rs_fill); | |
43ca9aa6 KR |
634 | if (frags->fr_fix) |
635 | { | |
636 | x = bfd_set_section_contents (stdoutput, sec, | |
637 | frags->fr_literal, offset, | |
638 | frags->fr_fix); | |
639 | assert (x == true); | |
640 | offset += frags->fr_fix; | |
641 | } | |
642 | fill_literal = frags->fr_literal + frags->fr_fix; | |
643 | fill_size = frags->fr_var; | |
644 | count = frags->fr_offset; | |
645 | assert (count >= 0); | |
646 | if (fill_size && count) | |
647 | while (count--) | |
648 | { | |
649 | x = bfd_set_section_contents (stdoutput, sec, | |
d5364748 KR |
650 | fill_literal, offset, |
651 | (bfd_size_type) fill_size); | |
43ca9aa6 KR |
652 | assert (x == true); |
653 | offset += fill_size; | |
654 | } | |
655 | } | |
43ca9aa6 KR |
656 | } |
657 | #endif | |
658 | ||
d5364748 KR |
659 | #if defined (BFD_ASSEMBLER) || !defined (BFD) |
660 | ||
6efd877d KR |
661 | void |
662 | write_object_file () | |
45432836 | 663 | { |
6efd877d KR |
664 | register struct frchain *frchainP; /* Track along all frchains. */ |
665 | register fragS *fragP; /* Track along all frags. */ | |
6efd877d | 666 | |
d5364748 | 667 | #if !defined (BFD_ASSEMBLER) && !defined (OBJ_VMS) |
6efd877d | 668 | long object_file_size; |
d5364748 | 669 | #endif |
6efd877d | 670 | |
43ca9aa6 KR |
671 | /* Do we really want to write it? */ |
672 | { | |
673 | int n_warns, n_errs; | |
674 | n_warns = had_warnings (); | |
675 | n_errs = had_errors (); | |
676 | /* The -Z flag indicates that an object file should be generated, | |
677 | regardless of warnings and errors. */ | |
678 | if (flagseen['Z']) | |
679 | { | |
680 | if (n_warns || n_errs) | |
681 | as_warn ("%d error%s, %d warning%s, generating bad object file.\n", | |
682 | n_errs, n_errs == 1 ? "" : "s", | |
683 | n_warns, n_warns == 1 ? "" : "s"); | |
684 | } | |
685 | else | |
686 | { | |
687 | if (n_errs) | |
688 | as_fatal ("%d error%s, %d warning%s, no object file generated.\n", | |
689 | n_errs, n_errs == 1 ? "" : "s", | |
690 | n_warns, n_warns == 1 ? "" : "s"); | |
691 | } | |
692 | } | |
693 | ||
3eb802b5 | 694 | #ifdef OBJ_VMS |
6efd877d | 695 | /* |
3eb802b5 ILT |
696 | * Under VMS we try to be compatible with VAX-11 "C". Thus, we |
697 | * call a routine to check for the definition of the procedure | |
698 | * "_main", and if so -- fix it up so that it can be program | |
699 | * entry point. | |
700 | */ | |
6efd877d | 701 | VMS_Check_For_Main (); |
fecd2382 | 702 | #endif /* VMS */ |
43ca9aa6 KR |
703 | |
704 | /* After every sub-segment, we fake an ".align ...". This conforms to | |
705 | BSD4.2 brane-damage. We then fake ".fill 0" because that is the kind of | |
706 | frag that requires least thought. ".align" frags like to have a | |
707 | following frag since that makes calculating their intended length | |
708 | trivial. | |
709 | ||
710 | @@ Is this really necessary?? */ | |
3eb802b5 | 711 | #ifndef SUB_SEGMENT_ALIGN |
43ca9aa6 | 712 | #ifdef BFD_ASSEMBLER |
f2f7d044 | 713 | #define SUB_SEGMENT_ALIGN(SEG) (0) |
43ca9aa6 | 714 | #else |
f2f7d044 | 715 | #define SUB_SEGMENT_ALIGN(SEG) (2) |
43ca9aa6 | 716 | #endif |
3eb802b5 | 717 | #endif |
6efd877d KR |
718 | for (frchainP = frchain_root; frchainP; frchainP = frchainP->frch_next) |
719 | { | |
43ca9aa6 KR |
720 | #ifdef BFD_ASSEMBLER |
721 | subseg_set (frchainP->frch_seg, frchainP->frch_subseg); | |
722 | #else | |
6efd877d | 723 | subseg_new (frchainP->frch_seg, frchainP->frch_subseg); |
43ca9aa6 | 724 | #endif |
f2f7d044 | 725 | frag_align (SUB_SEGMENT_ALIGN (now_seg), NOP_OPCODE); |
43ca9aa6 KR |
726 | /* frag_align will have left a new frag. |
727 | Use this last frag for an empty ".fill". | |
728 | ||
729 | For this segment ... | |
730 | Create a last frag. Do not leave a "being filled in frag". */ | |
6efd877d KR |
731 | frag_wane (frag_now); |
732 | frag_now->fr_fix = 0; | |
733 | know (frag_now->fr_next == NULL); | |
734 | /* know( frags . obstack_c_base == frags . obstack_c_next_free ); */ | |
735 | /* Above shows we haven't left a half-completed object on obstack. */ | |
43ca9aa6 | 736 | } |
6efd877d | 737 | |
43ca9aa6 KR |
738 | /* From now on, we don't care about sub-segments. Build one frag chain |
739 | for each segment. Linked thru fr_next. */ | |
65bfcf2e | 740 | |
43ca9aa6 KR |
741 | #ifdef BFD_ASSEMBLER |
742 | /* Remove the sections created by gas for its own purposes. */ | |
743 | { | |
744 | asection **seclist, *sec; | |
745 | seclist = &stdoutput->sections; | |
746 | while (seclist && *seclist) | |
747 | { | |
748 | sec = *seclist; | |
749 | while (sec == big_section | |
750 | || sec == reg_section | |
751 | || sec == pass1_section | |
752 | || sec == diff_section | |
753 | || sec == absent_section) | |
754 | { | |
755 | sec = sec->next; | |
756 | *seclist = sec; | |
757 | stdoutput->section_count--; | |
758 | if (!sec) | |
759 | break; | |
760 | } | |
761 | if (*seclist) | |
762 | seclist = &(*seclist)->next; | |
763 | } | |
764 | } | |
765 | ||
766 | bfd_map_over_sections (stdoutput, chain_frchains_together, (char *) 0); | |
767 | #else | |
6efd877d KR |
768 | remove_subsegs (frchain_root, SEG_TEXT, &text_frag_root, &text_last_frag); |
769 | remove_subsegs (data0_frchainP, SEG_DATA, &data_frag_root, &data_last_frag); | |
770 | remove_subsegs (bss0_frchainP, SEG_BSS, &bss_frag_root, &bss_last_frag); | |
43ca9aa6 | 771 | #endif |
6efd877d | 772 | |
43ca9aa6 KR |
773 | /* We have two segments. If user gave -R flag, then we must put the |
774 | data frags into the text segment. Do this before relaxing so | |
775 | we know to take advantage of -R and make shorter addresses. */ | |
776 | #if !defined (OBJ_AOUT) || defined (BFD_ASSEMBLER) | |
6efd877d KR |
777 | if (flagseen['R']) |
778 | { | |
43ca9aa6 KR |
779 | #ifdef BFD_ASSEMBLER |
780 | seg_info (text_section)->frchainP->frch_last->fr_next = | |
781 | seg_info (data_section)->frchainP->frch_root; | |
782 | seg_info (text_section)->frchainP->frch_last = | |
783 | seg_info (data_section)->frchainP->frch_last; | |
784 | seg_info (data_section)->frchainP = 0; | |
785 | #else | |
6efd877d KR |
786 | fixS *tmp; |
787 | ||
788 | text_last_frag->fr_next = data_frag_root; | |
789 | text_last_frag = data_last_frag; | |
790 | data_last_frag = NULL; | |
791 | data_frag_root = NULL; | |
792 | if (text_fix_root) | |
793 | { | |
794 | for (tmp = text_fix_root; tmp->fx_next; tmp = tmp->fx_next);; | |
795 | tmp->fx_next = data_fix_root; | |
796 | text_fix_tail = data_fix_tail; | |
a39116f1 | 797 | } |
6efd877d KR |
798 | else |
799 | text_fix_root = data_fix_root; | |
800 | data_fix_root = NULL; | |
43ca9aa6 | 801 | #endif |
6efd877d KR |
802 | } |
803 | #endif | |
43ca9aa6 KR |
804 | |
805 | #ifdef BFD_ASSEMBLER | |
d5364748 | 806 | |
43ca9aa6 KR |
807 | bfd_map_over_sections (stdoutput, relax_and_size_seg, (char *) 0); |
808 | #else | |
6efd877d KR |
809 | relax_segment (text_frag_root, SEG_TEXT); |
810 | relax_segment (data_frag_root, SEG_DATA); | |
811 | relax_segment (bss_frag_root, SEG_BSS); | |
812 | /* | |
7f2cb270 KR |
813 | * Now the addresses of frags are correct within the segment. |
814 | */ | |
6efd877d KR |
815 | |
816 | know (text_last_frag->fr_type == rs_fill && text_last_frag->fr_offset == 0); | |
817 | H_SET_TEXT_SIZE (&headers, text_last_frag->fr_address); | |
818 | text_last_frag->fr_address = H_GET_TEXT_SIZE (&headers); | |
819 | ||
820 | /* | |
7f2cb270 KR |
821 | * Join the 2 segments into 1 huge segment. |
822 | * To do this, re-compute every rn_address in the SEG_DATA frags. | |
823 | * Then join the data frags after the text frags. | |
824 | * | |
825 | * Determine a_data [length of data segment]. | |
826 | */ | |
6efd877d KR |
827 | if (data_frag_root) |
828 | { | |
829 | register relax_addressT slide; | |
830 | ||
831 | know ((text_last_frag->fr_type == rs_fill) && (text_last_frag->fr_offset == 0)); | |
832 | ||
833 | H_SET_DATA_SIZE (&headers, data_last_frag->fr_address); | |
834 | data_last_frag->fr_address = H_GET_DATA_SIZE (&headers); | |
835 | slide = H_GET_TEXT_SIZE (&headers); /* & in file of the data segment. */ | |
ebfb4167 MT |
836 | #ifdef OBJ_BOUT |
837 | #define RoundUp(N,S) (((N)+(S)-1)&-(S)) | |
6efd877d | 838 | /* For b.out: If the data section has a strict alignment |
7f2cb270 KR |
839 | requirement, its load address in the .o file will be |
840 | rounded up from the size of the text section. These | |
841 | two values are *not* the same! Similarly for the bss | |
842 | section.... */ | |
6efd877d | 843 | slide = RoundUp (slide, 1 << section_alignment[SEG_DATA]); |
ebfb4167 MT |
844 | #endif |
845 | ||
6efd877d KR |
846 | for (fragP = data_frag_root; fragP; fragP = fragP->fr_next) |
847 | { | |
848 | fragP->fr_address += slide; | |
849 | } /* for each data frag */ | |
850 | ||
851 | know (text_last_frag != 0); | |
852 | text_last_frag->fr_next = data_frag_root; | |
853 | } | |
854 | else | |
855 | { | |
856 | H_SET_DATA_SIZE (&headers, 0); | |
6efd877d | 857 | } |
ebfb4167 MT |
858 | |
859 | #ifdef OBJ_BOUT | |
6efd877d KR |
860 | /* See above comments on b.out data section address. */ |
861 | { | |
862 | long bss_vma; | |
863 | if (data_last_frag == 0) | |
864 | bss_vma = H_GET_TEXT_SIZE (&headers); | |
865 | else | |
866 | bss_vma = data_last_frag->fr_address; | |
867 | bss_vma = RoundUp (bss_vma, 1 << section_alignment[SEG_BSS]); | |
868 | bss_address_frag.fr_address = bss_vma; | |
869 | } | |
43ca9aa6 | 870 | #else /* ! OBJ_BOUT */ |
6efd877d KR |
871 | bss_address_frag.fr_address = (H_GET_TEXT_SIZE (&headers) + |
872 | H_GET_DATA_SIZE (&headers)); | |
873 | ||
65bfcf2e | 874 | |
6efd877d KR |
875 | /* Slide all the frags */ |
876 | if (bss_frag_root) | |
877 | { | |
85825401 | 878 | relax_addressT slide = bss_address_frag.fr_address; |
09952cd9 | 879 | |
6efd877d | 880 | for (fragP = bss_frag_root; fragP; fragP = fragP->fr_next) |
65bfcf2e | 881 | { |
6efd877d KR |
882 | fragP->fr_address += slide; |
883 | } /* for each bss frag */ | |
884 | } | |
65bfcf2e | 885 | |
43ca9aa6 | 886 | #endif /* ! OBJ_BOUT */ |
85825401 | 887 | |
6efd877d | 888 | if (bss_last_frag) |
85825401 ILT |
889 | H_SET_BSS_SIZE (&headers, |
890 | bss_last_frag->fr_address - bss_frag_root->fr_address); | |
891 | else | |
892 | H_SET_BSS_SIZE (&headers, 0); | |
43ca9aa6 | 893 | #endif /* BFD_ASSEMBLER */ |
65bfcf2e | 894 | |
43ca9aa6 | 895 | #ifndef BFD_ASSEMBLER |
6efd877d | 896 | /* |
7f2cb270 KR |
897 | * |
898 | * Crawl the symbol chain. | |
899 | * | |
900 | * For each symbol whose value depends on a frag, take the address of | |
901 | * that frag and subsume it into the value of the symbol. | |
902 | * After this, there is just one way to lookup a symbol value. | |
903 | * Values are left in their final state for object file emission. | |
904 | * We adjust the values of 'L' local symbols, even if we do | |
905 | * not intend to emit them to the object file, because their values | |
906 | * are needed for fix-ups. | |
907 | * | |
908 | * Unless we saw a -L flag, remove all symbols that begin with 'L' | |
909 | * from the symbol chain. (They are still pointed to by the fixes.) | |
910 | * | |
911 | * Count the remaining symbols. | |
912 | * Assign a symbol number to each symbol. | |
913 | * Count the number of string-table chars we will emit. | |
914 | * Put this info into the headers as appropriate. | |
915 | * | |
916 | */ | |
6efd877d KR |
917 | know (zero_address_frag.fr_address == 0); |
918 | string_byte_count = sizeof (string_byte_count); | |
919 | ||
920 | obj_crawl_symbol_chain (&headers); | |
921 | ||
922 | if (string_byte_count == sizeof (string_byte_count)) | |
43ca9aa6 | 923 | string_byte_count = 0; |
6efd877d KR |
924 | |
925 | H_SET_STRING_SIZE (&headers, string_byte_count); | |
926 | ||
927 | /* | |
7f2cb270 KR |
928 | * Addresses of frags now reflect addresses we use in the object file. |
929 | * Symbol values are correct. | |
930 | * Scan the frags, converting any ".org"s and ".align"s to ".fill"s. | |
931 | * Also converting any machine-dependent frags using md_convert_frag(); | |
932 | */ | |
6efd877d KR |
933 | subseg_change (SEG_TEXT, 0); |
934 | ||
935 | for (fragP = text_frag_root; fragP; fragP = fragP->fr_next) | |
936 | { | |
43ca9aa6 | 937 | cvt_frag_to_fill (&headers, fragP); |
6efd877d | 938 | |
43ca9aa6 KR |
939 | /* Some assert macros don't work with # directives mixed in. */ |
940 | #ifndef NDEBUG | |
941 | if (!(fragP->fr_next == NULL | |
ebfb4167 | 942 | #ifdef OBJ_BOUT |
43ca9aa6 | 943 | || fragP->fr_next == data_frag_root |
ebfb4167 | 944 | #endif |
6efd877d | 945 | || ((fragP->fr_next->fr_address - fragP->fr_address) |
43ca9aa6 KR |
946 | == (fragP->fr_fix + fragP->fr_offset * fragP->fr_var)))) |
947 | abort (); | |
948 | #endif | |
949 | } | |
950 | #endif /* ! BFD_ASSEMBLER */ | |
6efd877d | 951 | |
fecd2382 | 952 | #ifndef WORKING_DOT_WORD |
6efd877d KR |
953 | { |
954 | struct broken_word *lie; | |
955 | struct broken_word **prevP; | |
956 | ||
957 | prevP = &broken_words; | |
958 | for (lie = broken_words; lie; lie = lie->next_broken_word) | |
959 | if (!lie->added) | |
a39116f1 | 960 | { |
43ca9aa6 KR |
961 | #ifdef BFD_ASSEMBLER |
962 | fix_new (lie->frag, lie->word_goes_here - lie->frag->fr_literal, | |
d5364748 KR |
963 | 2, lie->add, lie->sub, lie->addnum, 0, |
964 | BFD_RELOC_NONE); | |
43ca9aa6 KR |
965 | #else |
966 | #if defined(TC_SPARC) || defined(TC_A29K) || defined(NEED_FX_R_TYPE) | |
967 | fix_new (lie->frag, lie->word_goes_here - lie->frag->fr_literal, | |
968 | 2, lie->add, | |
969 | lie->sub, lie->addnum, | |
970 | 0, NO_RELOC); | |
971 | #else | |
fecd2382 | 972 | #ifdef TC_NS32K |
6efd877d KR |
973 | fix_new_ns32k (lie->frag, |
974 | lie->word_goes_here - lie->frag->fr_literal, | |
975 | 2, | |
976 | lie->add, | |
977 | lie->sub, | |
978 | lie->addnum, | |
979 | 0, 0, 2, 0, 0); | |
343fb08d | 980 | #else |
6efd877d KR |
981 | fix_new (lie->frag, lie->word_goes_here - lie->frag->fr_literal, |
982 | 2, lie->add, | |
983 | lie->sub, lie->addnum, | |
984 | 0, 0); | |
fecd2382 | 985 | #endif /* TC_NS32K */ |
43ca9aa6 KR |
986 | #endif /* TC_SPARC|TC_A29K|NEED_FX_R_TYPE */ |
987 | #endif /* BFD_ASSEMBLER */ | |
6efd877d | 988 | *prevP = lie->next_broken_word; |
a39116f1 | 989 | } |
6efd877d KR |
990 | else |
991 | prevP = &(lie->next_broken_word); | |
992 | ||
993 | for (lie = broken_words; lie;) | |
994 | { | |
995 | struct broken_word *untruth; | |
996 | char *table_ptr; | |
d5364748 KR |
997 | addressT table_addr; |
998 | addressT from_addr, to_addr; | |
6efd877d KR |
999 | int n, m; |
1000 | ||
6efd877d KR |
1001 | fragP = lie->dispfrag; |
1002 | ||
43ca9aa6 | 1003 | /* Find out how many broken_words go here. */ |
6efd877d KR |
1004 | n = 0; |
1005 | for (untruth = lie; untruth && untruth->dispfrag == fragP; untruth = untruth->next_broken_word) | |
1006 | if (untruth->added == 1) | |
1007 | n++; | |
1008 | ||
1009 | table_ptr = lie->dispfrag->fr_opcode; | |
1010 | table_addr = lie->dispfrag->fr_address + (table_ptr - lie->dispfrag->fr_literal); | |
43ca9aa6 KR |
1011 | /* Create the jump around the long jumps. This is a short |
1012 | jump from table_ptr+0 to table_ptr+n*long_jump_size. */ | |
6efd877d KR |
1013 | from_addr = table_addr; |
1014 | to_addr = table_addr + md_short_jump_size + n * md_long_jump_size; | |
1015 | md_create_short_jump (table_ptr, from_addr, to_addr, lie->dispfrag, lie->add); | |
1016 | table_ptr += md_short_jump_size; | |
1017 | table_addr += md_short_jump_size; | |
1018 | ||
1019 | for (m = 0; lie && lie->dispfrag == fragP; m++, lie = lie->next_broken_word) | |
1020 | { | |
1021 | if (lie->added == 2) | |
1022 | continue; | |
1023 | /* Patch the jump table */ | |
1024 | /* This is the offset from ??? to table_ptr+0 */ | |
d5364748 | 1025 | to_addr = table_addr - S_GET_VALUE (lie->sub); |
6efd877d KR |
1026 | md_number_to_chars (lie->word_goes_here, to_addr, 2); |
1027 | for (untruth = lie->next_broken_word; untruth && untruth->dispfrag == fragP; untruth = untruth->next_broken_word) | |
1028 | { | |
1029 | if (untruth->use_jump == lie) | |
1030 | md_number_to_chars (untruth->word_goes_here, to_addr, 2); | |
1031 | } | |
1032 | ||
1033 | /* Install the long jump */ | |
1034 | /* this is a long jump from table_ptr+0 to the final target */ | |
1035 | from_addr = table_addr; | |
1036 | to_addr = S_GET_VALUE (lie->add) + lie->addnum; | |
1037 | md_create_long_jump (table_ptr, from_addr, to_addr, lie->dispfrag, lie->add); | |
1038 | table_ptr += md_long_jump_size; | |
1039 | table_addr += md_long_jump_size; | |
1040 | } | |
1041 | } | |
1042 | } | |
fecd2382 | 1043 | #endif /* not WORKING_DOT_WORD */ |
6efd877d | 1044 | |
43ca9aa6 | 1045 | #ifndef BFD_ASSEMBLER |
3eb802b5 | 1046 | #ifndef OBJ_VMS |
6efd877d KR |
1047 | { /* not vms */ |
1048 | /* | |
3eb802b5 ILT |
1049 | * Scan every FixS performing fixups. We had to wait until now to do |
1050 | * this because md_convert_frag() may have made some fixSs. | |
1051 | */ | |
6efd877d KR |
1052 | int trsize, drsize; |
1053 | ||
1054 | subseg_change (SEG_TEXT, 0); | |
d5364748 | 1055 | trsize = md_reloc_size * fixup_segment (text_fix_root, SEG_TEXT); |
6efd877d | 1056 | subseg_change (SEG_DATA, 0); |
d5364748 | 1057 | drsize = md_reloc_size * fixup_segment (data_fix_root, SEG_DATA); |
6efd877d KR |
1058 | H_SET_RELOCATION_SIZE (&headers, trsize, drsize); |
1059 | ||
1060 | /* FIXME move this stuff into the pre-write-hook */ | |
1061 | H_SET_MAGIC_NUMBER (&headers, magic_number_for_object_file); | |
1062 | H_SET_ENTRY_POINT (&headers, 0); | |
1063 | ||
1064 | obj_pre_write_hook (&headers); /* extra coff stuff */ | |
6efd877d KR |
1065 | |
1066 | object_file_size = H_GET_FILE_SIZE (&headers); | |
1067 | next_object_file_charP = the_object_file = xmalloc (object_file_size); | |
1068 | ||
1069 | output_file_create (out_file_name); | |
1070 | ||
1071 | obj_header_append (&next_object_file_charP, &headers); | |
1072 | ||
1073 | know ((next_object_file_charP - the_object_file) == H_GET_HEADER_SIZE (&headers)); | |
1074 | ||
1075 | /* | |
43ca9aa6 KR |
1076 | * Emit code. |
1077 | */ | |
6efd877d KR |
1078 | for (fragP = text_frag_root; fragP; fragP = fragP->fr_next) |
1079 | { | |
1080 | register long count; | |
1081 | register char *fill_literal; | |
1082 | register long fill_size; | |
1083 | ||
1084 | know (fragP->fr_type == rs_fill); | |
1085 | append (&next_object_file_charP, fragP->fr_literal, (unsigned long) fragP->fr_fix); | |
1086 | fill_literal = fragP->fr_literal + fragP->fr_fix; | |
1087 | fill_size = fragP->fr_var; | |
1088 | know (fragP->fr_offset >= 0); | |
1089 | ||
1090 | for (count = fragP->fr_offset; count; count--) | |
1091 | { | |
1092 | append (&next_object_file_charP, fill_literal, (unsigned long) fill_size); | |
1093 | } /* for each */ | |
1094 | ||
1095 | } /* for each code frag. */ | |
1096 | ||
1097 | know ((next_object_file_charP - the_object_file) == (H_GET_HEADER_SIZE (&headers) + H_GET_TEXT_SIZE (&headers) + H_GET_DATA_SIZE (&headers))); | |
1098 | ||
1099 | /* | |
43ca9aa6 KR |
1100 | * Emit relocations. |
1101 | */ | |
6efd877d KR |
1102 | obj_emit_relocations (&next_object_file_charP, text_fix_root, (relax_addressT) 0); |
1103 | know ((next_object_file_charP - the_object_file) == (H_GET_HEADER_SIZE (&headers) + H_GET_TEXT_SIZE (&headers) + H_GET_DATA_SIZE (&headers) + H_GET_TEXT_RELOCATION_SIZE (&headers))); | |
fecd2382 | 1104 | #ifdef TC_I960 |
6efd877d | 1105 | /* Make addresses in data relocation directives relative to beginning of |
43ca9aa6 KR |
1106 | * first data fragment, not end of last text fragment: alignment of the |
1107 | * start of the data segment may place a gap between the segments. | |
1108 | */ | |
6efd877d | 1109 | obj_emit_relocations (&next_object_file_charP, data_fix_root, data0_frchainP->frch_root->fr_address); |
fecd2382 | 1110 | #else /* TC_I960 */ |
6efd877d | 1111 | obj_emit_relocations (&next_object_file_charP, data_fix_root, text_last_frag->fr_address); |
fecd2382 | 1112 | #endif /* TC_I960 */ |
6efd877d KR |
1113 | |
1114 | know ((next_object_file_charP - the_object_file) == (H_GET_HEADER_SIZE (&headers) + H_GET_TEXT_SIZE (&headers) + H_GET_DATA_SIZE (&headers) + H_GET_TEXT_RELOCATION_SIZE (&headers) + H_GET_DATA_RELOCATION_SIZE (&headers))); | |
1115 | ||
1116 | /* | |
43ca9aa6 KR |
1117 | * Emit line number entries. |
1118 | */ | |
6efd877d KR |
1119 | OBJ_EMIT_LINENO (&next_object_file_charP, lineno_rootP, the_object_file); |
1120 | know ((next_object_file_charP - the_object_file) == (H_GET_HEADER_SIZE (&headers) + H_GET_TEXT_SIZE (&headers) + H_GET_DATA_SIZE (&headers) + H_GET_TEXT_RELOCATION_SIZE (&headers) + H_GET_DATA_RELOCATION_SIZE (&headers) + H_GET_LINENO_SIZE (&headers))); | |
1121 | ||
1122 | /* | |
3eb802b5 ILT |
1123 | * Emit symbols. |
1124 | */ | |
6efd877d KR |
1125 | obj_emit_symbols (&next_object_file_charP, symbol_rootP); |
1126 | know ((next_object_file_charP - the_object_file) == (H_GET_HEADER_SIZE (&headers) + H_GET_TEXT_SIZE (&headers) + H_GET_DATA_SIZE (&headers) + H_GET_TEXT_RELOCATION_SIZE (&headers) + H_GET_DATA_RELOCATION_SIZE (&headers) + H_GET_LINENO_SIZE (&headers) + H_GET_SYMBOL_TABLE_SIZE (&headers))); | |
1127 | ||
1128 | /* | |
3eb802b5 ILT |
1129 | * Emit strings. |
1130 | */ | |
6efd877d KR |
1131 | |
1132 | if (string_byte_count > 0) | |
1133 | { | |
1134 | obj_emit_strings (&next_object_file_charP); | |
1135 | } /* only if we have a string table */ | |
1136 | ||
45432836 | 1137 | #ifdef BFD_HEADERS |
6efd877d KR |
1138 | bfd_seek (stdoutput, 0, 0); |
1139 | bfd_write (the_object_file, 1, object_file_size, stdoutput); | |
45432836 | 1140 | #else |
6efd877d KR |
1141 | |
1142 | /* Write the data to the file */ | |
1143 | output_file_append (the_object_file, object_file_size, out_file_name); | |
45432836 | 1144 | #endif |
6efd877d KR |
1145 | |
1146 | output_file_close (out_file_name); | |
1147 | } /* non vms output */ | |
1148 | #else /* VMS */ | |
1149 | /* | |
3eb802b5 ILT |
1150 | * Now do the VMS-dependent part of writing the object file |
1151 | */ | |
85825401 ILT |
1152 | VMS_write_object_file (H_GET_TEXT_SIZE (&headers), |
1153 | H_GET_DATA_SIZE (&headers), | |
1154 | H_GET_BSS_SIZE (&headers), | |
3eb802b5 | 1155 | text_frag_root, data_frag_root); |
6efd877d | 1156 | #endif /* VMS */ |
43ca9aa6 | 1157 | #else /* BFD_ASSEMBLER */ |
6efd877d | 1158 | |
d5364748 KR |
1159 | #ifdef obj_check_file_symbols |
1160 | obj_check_file_symbols (); | |
1161 | #endif | |
1162 | ||
1163 | bfd_map_over_sections (stdoutput, adjust_reloc_syms, (char *)0); | |
1164 | ||
43ca9aa6 KR |
1165 | /* Set up symbol table, and write it out. */ |
1166 | if (symbol_rootP) | |
1167 | { | |
1168 | int i = 0, n; | |
1169 | symbolS *symp; | |
1170 | ||
1171 | for (symp = symbol_rootP; symp; symp = symbol_next (symp)) | |
1172 | { | |
d5364748 KR |
1173 | int keep = 0; |
1174 | ||
43ca9aa6 KR |
1175 | S_SET_VALUE (symp, S_GET_VALUE (symp) + symp->sy_frag->fr_address); |
1176 | /* So far, common symbols have been treated like undefined symbols. | |
1177 | Put them in the common section now. */ | |
1178 | if (S_IS_DEFINED (symp) == 0 | |
1179 | && S_GET_VALUE (symp) != 0) | |
1180 | S_SET_SEGMENT (symp, &bfd_com_section); | |
1181 | #if 0 | |
d5364748 | 1182 | printf ("symbol `%s'\n\t@%x: value=%d flags=%x forward=%x seg=%s\n", |
43ca9aa6 KR |
1183 | S_GET_NAME (symp), symp, |
1184 | S_GET_VALUE (symp), | |
d5364748 | 1185 | symp->bsym->flags, |
43ca9aa6 KR |
1186 | symp->sy_forward, |
1187 | segment_name (symp->bsym->section)); | |
1188 | #endif | |
1189 | { | |
1190 | int punt = 0; | |
1191 | #ifdef obj_frob_symbol | |
1192 | obj_frob_symbol (symp, punt); | |
1193 | if (punt) | |
1194 | goto punt_it; | |
1195 | #endif | |
1196 | #ifdef tc_frob_symbol | |
1197 | tc_frob_symbol (symp, punt); | |
1198 | if (punt) | |
1199 | goto punt_it; | |
1200 | #endif | |
1201 | } | |
1202 | /* If we don't want to keep this symbol, splice it out of the | |
1203 | chain now. */ | |
1204 | if (S_IS_LOCAL (symp)) | |
1205 | { | |
1206 | symbolS *prev, *next; | |
1207 | punt_it: | |
1208 | prev = symbol_previous (symp); | |
1209 | next = symbol_next (symp); | |
1210 | #ifdef DEBUG | |
d5364748 | 1211 | verify_symbol_chain_2 (symp); |
43ca9aa6 KR |
1212 | #endif |
1213 | if (prev) | |
1214 | { | |
1215 | symbol_next (prev) = next; | |
1216 | symp = prev; | |
1217 | } | |
d5364748 KR |
1218 | else if (symp == symbol_rootP) |
1219 | symbol_rootP = next; | |
43ca9aa6 KR |
1220 | else |
1221 | abort (); | |
1222 | if (next) | |
1223 | symbol_previous (next) = prev; | |
1224 | else | |
1225 | symbol_lastP = prev; | |
1226 | #ifdef DEBUG | |
d5364748 KR |
1227 | if (prev) |
1228 | verify_symbol_chain_2 (prev); | |
1229 | else if (next) | |
1230 | verify_symbol_chain_2 (next); | |
45432836 | 1231 | #endif |
43ca9aa6 KR |
1232 | continue; |
1233 | } | |
85051959 ILT |
1234 | |
1235 | /* Set the value into the BFD symbol. Up til now the value | |
1236 | has only been kept in the gas symbolS struct. */ | |
1237 | symp->bsym->value = S_GET_VALUE (symp); | |
1238 | ||
43ca9aa6 KR |
1239 | i++; |
1240 | } | |
1241 | n = i; | |
1242 | if (n) | |
1243 | { | |
1244 | asymbol **asympp; | |
1245 | boolean result; | |
d5364748 | 1246 | extern PTR bfd_alloc PARAMS ((bfd *, size_t)); |
43ca9aa6 | 1247 | |
d5364748 KR |
1248 | asympp = (asymbol **) bfd_alloc (stdoutput, |
1249 | n * sizeof (asymbol *)); | |
43ca9aa6 KR |
1250 | symp = symbol_rootP; |
1251 | for (i = 0; i < n; i++, symp = symbol_next (symp)) | |
1252 | { | |
1253 | asympp[i] = symp->bsym; | |
1254 | symp->written = 1; | |
1255 | } | |
1256 | result = bfd_set_symtab (stdoutput, asympp, n); | |
1257 | assert (result == true); | |
1258 | } | |
1259 | } | |
1260 | ||
d5364748 | 1261 | |
f2f7d044 | 1262 | #ifdef obj_frob_file |
85051959 ILT |
1263 | /* If obj_frob_file changes the symbol value at this point, it is |
1264 | responsible for moving the changed value into symp->bsym->value | |
1265 | as well. Hopefully all symbol value changing can be done in | |
1266 | {obj,tc}_frob_symbol. */ | |
f2f7d044 ILT |
1267 | obj_frob_file (); |
1268 | #endif | |
1269 | ||
43ca9aa6 KR |
1270 | /* Now that all the sizes are known, and contents correct, we can |
1271 | start writing the file. */ | |
1272 | bfd_map_over_sections (stdoutput, write_contents, (char *) 0); | |
1273 | ||
1274 | output_file_close (out_file_name); | |
1275 | #endif /* BFD_ASSEMBLER */ | |
1276 | } | |
d5364748 | 1277 | #endif /* ! BFD */ |
fecd2382 RP |
1278 | |
1279 | /* | |
1280 | * relax_segment() | |
1281 | * | |
1282 | * Now we have a segment, not a crowd of sub-segments, we can make fr_address | |
1283 | * values. | |
1284 | * | |
1285 | * Relax the frags. | |
1286 | * | |
1287 | * After this, all frags in this segment have addresses that are correct | |
1288 | * within the segment. Since segments live in different file addresses, | |
1289 | * these frag addresses may not be the same as final object-file addresses. | |
1290 | */ | |
45432836 | 1291 | |
d5364748 | 1292 | /* Subroutines of relax_segment. */ |
43ca9aa6 KR |
1293 | static int |
1294 | is_dnrange (f1, f2) | |
1295 | struct frag *f1; | |
1296 | struct frag *f2; | |
1297 | { | |
1298 | for (; f1; f1 = f1->fr_next) | |
1299 | if (f1->fr_next == f2) | |
1300 | return 1; | |
1301 | return 0; | |
1302 | } | |
1303 | ||
1304 | /* Relax_align. Advance location counter to next address that has 'alignment' | |
d5364748 | 1305 | lowest order bits all 0s, return size of adjustment made. */ |
43ca9aa6 KR |
1306 | static relax_addressT |
1307 | relax_align (address, alignment) | |
1308 | register relax_addressT address; /* Address now. */ | |
d5364748 | 1309 | register int alignment; /* Alignment (binary). */ |
43ca9aa6 KR |
1310 | { |
1311 | relax_addressT mask; | |
1312 | relax_addressT new_address; | |
1313 | ||
1314 | mask = ~((~0) << alignment); | |
1315 | new_address = (address + mask) & (~mask); | |
1316 | if (linkrelax) | |
1317 | /* We must provide lots of padding, so the linker can discard it | |
1318 | when needed. The linker will not add extra space, ever. */ | |
1319 | new_address += (1 << alignment); | |
1320 | return (new_address - address); | |
1321 | } | |
45432836 | 1322 | |
6efd877d KR |
1323 | void |
1324 | relax_segment (segment_frag_root, segment) | |
1325 | struct frag *segment_frag_root; | |
43ca9aa6 | 1326 | segT segment; |
fecd2382 | 1327 | { |
6efd877d KR |
1328 | register struct frag *fragP; |
1329 | register relax_addressT address; | |
43ca9aa6 | 1330 | #if !defined (MANY_SEGMENTS) && !defined (BFD_ASSEMBLER) |
6efd877d | 1331 | know (segment == SEG_DATA || segment == SEG_TEXT || segment == SEG_BSS); |
45432836 | 1332 | #endif |
6efd877d KR |
1333 | /* In case md_estimate_size_before_relax() wants to make fixSs. */ |
1334 | subseg_change (segment, 0); | |
1335 | ||
7f2cb270 KR |
1336 | /* For each frag in segment: count and store (a 1st guess of) |
1337 | fr_address. */ | |
6efd877d KR |
1338 | address = 0; |
1339 | for (fragP = segment_frag_root; fragP; fragP = fragP->fr_next) | |
1340 | { | |
1341 | fragP->fr_address = address; | |
1342 | address += fragP->fr_fix; | |
1343 | ||
1344 | switch (fragP->fr_type) | |
1345 | { | |
1346 | case rs_fill: | |
1347 | address += fragP->fr_offset * fragP->fr_var; | |
1348 | break; | |
1349 | ||
1350 | case rs_align: | |
d5364748 | 1351 | address += relax_align (address, (int) fragP->fr_offset); |
6efd877d KR |
1352 | break; |
1353 | ||
1354 | case rs_org: | |
7f2cb270 | 1355 | /* Assume .org is nugatory. It will grow with 1st relax. */ |
6efd877d KR |
1356 | break; |
1357 | ||
1358 | case rs_machine_dependent: | |
1359 | address += md_estimate_size_before_relax (fragP, segment); | |
1360 | break; | |
1361 | ||
fecd2382 | 1362 | #ifndef WORKING_DOT_WORD |
6efd877d KR |
1363 | /* Broken words don't concern us yet */ |
1364 | case rs_broken_word: | |
1365 | break; | |
fecd2382 | 1366 | #endif |
6efd877d KR |
1367 | |
1368 | default: | |
1369 | BAD_CASE (fragP->fr_type); | |
1370 | break; | |
1371 | } /* switch(fr_type) */ | |
1372 | } /* for each frag in the segment */ | |
1373 | ||
7f2cb270 | 1374 | /* Do relax(). */ |
6efd877d | 1375 | { |
7f2cb270 | 1376 | long stretch; /* May be any size, 0 or negative. */ |
6efd877d KR |
1377 | /* Cumulative number of addresses we have */ |
1378 | /* relaxed this pass. */ | |
1379 | /* We may have relaxed more than one address. */ | |
7f2cb270 KR |
1380 | long stretched; /* Have we stretched on this pass? */ |
1381 | /* This is 'cuz stretch may be zero, when, in fact some piece of code | |
1382 | grew, and another shrank. If a branch instruction doesn't fit anymore, | |
1383 | we could be scrod. */ | |
6efd877d KR |
1384 | |
1385 | do | |
1386 | { | |
1387 | stretch = stretched = 0; | |
1388 | for (fragP = segment_frag_root; fragP; fragP = fragP->fr_next) | |
1389 | { | |
7f2cb270 KR |
1390 | long growth = 0; |
1391 | unsigned long was_address; | |
1392 | long offset; | |
1393 | symbolS *symbolP; | |
1394 | long target; | |
1395 | long after; | |
1396 | long aim; | |
6efd877d KR |
1397 | |
1398 | was_address = fragP->fr_address; | |
1399 | address = fragP->fr_address += stretch; | |
1400 | symbolP = fragP->fr_symbol; | |
1401 | offset = fragP->fr_offset; | |
6efd877d KR |
1402 | |
1403 | switch (fragP->fr_type) | |
1404 | { | |
1405 | case rs_fill: /* .fill never relaxes. */ | |
1406 | growth = 0; | |
1407 | break; | |
1408 | ||
fecd2382 | 1409 | #ifndef WORKING_DOT_WORD |
6efd877d | 1410 | /* JF: This is RMS's idea. I do *NOT* want to be blamed |
7f2cb270 KR |
1411 | for it I do not want to write it. I do not want to have |
1412 | anything to do with it. This is not the proper way to | |
1413 | implement this misfeature. */ | |
6efd877d KR |
1414 | case rs_broken_word: |
1415 | { | |
1416 | struct broken_word *lie; | |
1417 | struct broken_word *untruth; | |
6efd877d KR |
1418 | |
1419 | /* Yes this is ugly (storing the broken_word pointer | |
7f2cb270 KR |
1420 | in the symbol slot). Still, this whole chunk of |
1421 | code is ugly, and I don't feel like doing anything | |
1422 | about it. Think of it as stubbornness in action. */ | |
6efd877d KR |
1423 | growth = 0; |
1424 | for (lie = (struct broken_word *) (fragP->fr_symbol); | |
1425 | lie && lie->dispfrag == fragP; | |
1426 | lie = lie->next_broken_word) | |
1427 | { | |
1428 | ||
1429 | if (lie->added) | |
1430 | continue; | |
1431 | ||
7f2cb270 KR |
1432 | offset = (lie->add->sy_frag->fr_address |
1433 | + S_GET_VALUE (lie->add) | |
1434 | + lie->addnum | |
1435 | - (lie->sub->sy_frag->fr_address | |
1436 | + S_GET_VALUE (lie->sub))); | |
6efd877d KR |
1437 | if (offset <= -32768 || offset >= 32767) |
1438 | { | |
1439 | if (flagseen['K']) | |
d5364748 KR |
1440 | { |
1441 | char buf[50]; | |
1442 | sprint_value (buf, lie->addnum); | |
1443 | as_warn (".word %s-%s+%s didn't fit", | |
1444 | S_GET_NAME (lie->add), | |
1445 | S_GET_NAME (lie->sub), | |
1446 | buf); | |
1447 | } | |
6efd877d KR |
1448 | lie->added = 1; |
1449 | if (fragP->fr_subtype == 0) | |
1450 | { | |
1451 | fragP->fr_subtype++; | |
1452 | growth += md_short_jump_size; | |
1453 | } | |
7f2cb270 KR |
1454 | for (untruth = lie->next_broken_word; |
1455 | untruth && untruth->dispfrag == lie->dispfrag; | |
1456 | untruth = untruth->next_broken_word) | |
6efd877d KR |
1457 | if ((untruth->add->sy_frag == lie->add->sy_frag) |
1458 | && S_GET_VALUE (untruth->add) == S_GET_VALUE (lie->add)) | |
1459 | { | |
1460 | untruth->added = 2; | |
1461 | untruth->use_jump = lie; | |
1462 | } | |
1463 | growth += md_long_jump_size; | |
1464 | } | |
1465 | } | |
1466 | ||
1467 | break; | |
1468 | } /* case rs_broken_word */ | |
fecd2382 | 1469 | #endif |
6efd877d | 1470 | case rs_align: |
43ca9aa6 KR |
1471 | growth = (relax_align ((relax_addressT) (address |
1472 | + fragP->fr_fix), | |
d5364748 | 1473 | (int) offset) |
43ca9aa6 KR |
1474 | - relax_align ((relax_addressT) (was_address |
1475 | + fragP->fr_fix), | |
d5364748 | 1476 | (int) offset)); |
6efd877d KR |
1477 | break; |
1478 | ||
1479 | case rs_org: | |
1480 | target = offset; | |
1481 | ||
1482 | if (symbolP) | |
1483 | { | |
43ca9aa6 KR |
1484 | #if !defined (MANY_SEGMENTS) && !defined (BFD_ASSEMBLER) |
1485 | know ((S_GET_SEGMENT (symbolP) == SEG_ABSOLUTE) | |
1486 | || (S_GET_SEGMENT (symbolP) == SEG_DATA) | |
1487 | || (S_GET_SEGMENT (symbolP) == SEG_TEXT) | |
1488 | || S_GET_SEGMENT (symbolP) == SEG_BSS); | |
6efd877d | 1489 | know (symbolP->sy_frag); |
43ca9aa6 KR |
1490 | know (!(S_GET_SEGMENT (symbolP) == SEG_ABSOLUTE) |
1491 | || (symbolP->sy_frag == &zero_address_frag)); | |
45432836 | 1492 | #endif |
6efd877d KR |
1493 | target += S_GET_VALUE (symbolP) |
1494 | + symbolP->sy_frag->fr_address; | |
1495 | } /* if we have a symbol */ | |
1496 | ||
1497 | know (fragP->fr_next); | |
1498 | after = fragP->fr_next->fr_address; | |
1499 | growth = ((target - after) > 0) ? (target - after) : 0; | |
43ca9aa6 KR |
1500 | /* Growth may be negative, but variable part of frag |
1501 | cannot have fewer than 0 chars. That is, we can't | |
1502 | .org backwards. */ | |
6efd877d KR |
1503 | |
1504 | growth -= stretch; /* This is an absolute growth factor */ | |
1505 | break; | |
1506 | ||
1507 | case rs_machine_dependent: | |
1508 | { | |
7f2cb270 KR |
1509 | const relax_typeS *this_type; |
1510 | const relax_typeS *start_type; | |
1511 | relax_substateT next_state; | |
1512 | relax_substateT this_state; | |
6efd877d | 1513 | |
7f2cb270 KR |
1514 | this_state = fragP->fr_subtype; |
1515 | start_type = this_type = md_relax_table + this_state; | |
6efd877d KR |
1516 | target = offset; |
1517 | ||
1518 | if (symbolP) | |
1519 | { | |
43ca9aa6 KR |
1520 | #if !defined (MANY_SEGMENTS) && !defined (BFD_ASSEMBLER) |
1521 | know ((S_GET_SEGMENT (symbolP) == SEG_ABSOLUTE) | |
1522 | || (S_GET_SEGMENT (symbolP) == SEG_DATA) | |
1523 | || (S_GET_SEGMENT (symbolP) == SEG_BSS) | |
1524 | || (S_GET_SEGMENT (symbolP) == SEG_TEXT)); | |
45432836 | 1525 | #endif |
6efd877d | 1526 | know (symbolP->sy_frag); |
43ca9aa6 KR |
1527 | know (!(S_GET_SEGMENT (symbolP) == absolute_section) |
1528 | || symbolP->sy_frag == &zero_address_frag); | |
6efd877d KR |
1529 | target += |
1530 | S_GET_VALUE (symbolP) | |
1531 | + symbolP->sy_frag->fr_address; | |
1532 | ||
1533 | /* If frag has yet to be reached on this pass, | |
7f2cb270 KR |
1534 | assume it will move by STRETCH just as we did. |
1535 | If this is not so, it will be because some frag | |
d5364748 KR |
1536 | between grows, and that will force another pass. |
1537 | ||
1538 | Beware zero-length frags. | |
1539 | ||
1540 | There should be a faster way to do this. */ | |
6efd877d KR |
1541 | |
1542 | if (symbolP->sy_frag->fr_address >= was_address | |
1543 | && is_dnrange (fragP, symbolP->sy_frag)) | |
1544 | { | |
1545 | target += stretch; | |
7f2cb270 | 1546 | } |
d5364748 | 1547 | } |
6efd877d KR |
1548 | |
1549 | aim = target - address - fragP->fr_fix; | |
1550 | /* The displacement is affected by the instruction size | |
7f2cb270 KR |
1551 | for the 32k architecture. I think we ought to be able |
1552 | to add fragP->fr_pcrel_adjust in all cases (it should be | |
1553 | zero if not used), but just in case it breaks something | |
1554 | else we'll put this inside #ifdef NS32K ... #endif */ | |
d5364748 KR |
1555 | #ifndef TC_NS32K |
1556 | if (fragP->fr_pcrel_adjust) | |
1557 | abort (); | |
1558 | #endif | |
6efd877d | 1559 | aim += fragP->fr_pcrel_adjust; |
6efd877d KR |
1560 | |
1561 | if (aim < 0) | |
1562 | { | |
1563 | /* Look backwards. */ | |
1564 | for (next_state = this_type->rlx_more; next_state;) | |
7f2cb270 KR |
1565 | if (aim >= this_type->rlx_backward) |
1566 | next_state = 0; | |
1567 | else | |
1568 | { | |
1569 | /* Grow to next state. */ | |
1570 | this_state = next_state; | |
1571 | this_type = md_relax_table + this_state; | |
1572 | next_state = this_type->rlx_more; | |
1573 | } | |
6efd877d KR |
1574 | } |
1575 | else | |
1576 | { | |
a39116f1 | 1577 | #ifdef M68K_AIM_KLUDGE |
6efd877d | 1578 | M68K_AIM_KLUDGE (aim, this_state, this_type); |
fecd2382 | 1579 | #endif |
6efd877d KR |
1580 | /* Look forwards. */ |
1581 | for (next_state = this_type->rlx_more; next_state;) | |
7f2cb270 KR |
1582 | if (aim <= this_type->rlx_forward) |
1583 | next_state = 0; | |
1584 | else | |
1585 | { | |
1586 | /* Grow to next state. */ | |
1587 | this_state = next_state; | |
1588 | this_type = md_relax_table + this_state; | |
1589 | next_state = this_type->rlx_more; | |
1590 | } | |
6efd877d KR |
1591 | } |
1592 | ||
7f2cb270 KR |
1593 | growth = this_type->rlx_length - start_type->rlx_length; |
1594 | if (growth != 0) | |
6efd877d | 1595 | fragP->fr_subtype = this_state; |
7f2cb270 KR |
1596 | } |
1597 | break; | |
6efd877d KR |
1598 | |
1599 | default: | |
1600 | BAD_CASE (fragP->fr_type); | |
1601 | break; | |
1602 | } | |
1603 | if (growth) | |
1604 | { | |
1605 | stretch += growth; | |
1606 | stretched++; | |
1607 | } | |
1608 | } /* For each frag in the segment. */ | |
1609 | } | |
1610 | while (stretched); /* Until nothing further to relax. */ | |
1611 | } /* do_relax */ | |
1612 | ||
1613 | /* | |
7f2cb270 KR |
1614 | * We now have valid fr_address'es for each frag. |
1615 | */ | |
6efd877d KR |
1616 | |
1617 | /* | |
7f2cb270 KR |
1618 | * All fr_address's are correct, relative to their own segment. |
1619 | * We have made all the fixS we will ever make. | |
1620 | */ | |
6efd877d | 1621 | } /* relax_segment() */ |
fecd2382 | 1622 | |
fecd2382 | 1623 | /* fixup_segment() |
6efd877d | 1624 | |
fecd2382 RP |
1625 | Go through all the fixS's in a segment and see which ones can be |
1626 | handled now. (These consist of fixS where we have since discovered | |
1627 | the value of a symbol, or the address of the frag involved.) | |
1628 | For each one, call md_apply_fix to put the fix into the frag data. | |
6efd877d | 1629 | |
fecd2382 RP |
1630 | Result is a count of how many relocation structs will be needed to |
1631 | handle the remaining fixS's that we couldn't completely handle here. | |
1632 | These will be output later by emit_relocations(). */ | |
1633 | ||
09952cd9 | 1634 | static long |
6efd877d | 1635 | fixup_segment (fixP, this_segment_type) |
09952cd9 | 1636 | register fixS *fixP; |
6efd877d | 1637 | segT this_segment_type; /* N_TYPE bits for segment. */ |
fecd2382 | 1638 | { |
6efd877d KR |
1639 | register long seg_reloc_count; |
1640 | register symbolS *add_symbolP; | |
1641 | register symbolS *sub_symbolP; | |
d5364748 | 1642 | valueT add_number; |
6efd877d KR |
1643 | register int size; |
1644 | register char *place; | |
1645 | register long where; | |
1646 | register char pcrel; | |
1647 | register fragS *fragP; | |
43ca9aa6 | 1648 | register segT add_symbol_segment = absolute_section; |
6efd877d | 1649 | |
6efd877d | 1650 | seg_reloc_count = 0; |
6efd877d KR |
1651 | /* If the linker is doing the relaxing, we must not do any fixups */ |
1652 | if (linkrelax) | |
43ca9aa6 KR |
1653 | for (; fixP; fixP = fixP->fx_next) |
1654 | seg_reloc_count++; | |
6efd877d | 1655 | else |
6efd877d KR |
1656 | for (; fixP; fixP = fixP->fx_next) |
1657 | { | |
1658 | fragP = fixP->fx_frag; | |
1659 | know (fragP); | |
1660 | where = fixP->fx_where; | |
1661 | place = fragP->fr_literal + where; | |
1662 | size = fixP->fx_size; | |
1663 | add_symbolP = fixP->fx_addsy; | |
fecd2382 | 1664 | #ifdef TC_I960 |
6efd877d KR |
1665 | if (fixP->fx_callj && TC_S_IS_CALLNAME (add_symbolP)) |
1666 | { | |
43ca9aa6 KR |
1667 | /* Relocation should be done via the associated 'bal' |
1668 | entry point symbol. */ | |
6efd877d KR |
1669 | |
1670 | if (!TC_S_IS_BALNAME (tc_get_bal_of_call (add_symbolP))) | |
1671 | { | |
1672 | as_bad ("No 'bal' entry point for leafproc %s", | |
1673 | S_GET_NAME (add_symbolP)); | |
1674 | continue; | |
1675 | } | |
1676 | fixP->fx_addsy = add_symbolP = tc_get_bal_of_call (add_symbolP); | |
43ca9aa6 | 1677 | } |
fecd2382 | 1678 | #endif |
6efd877d KR |
1679 | sub_symbolP = fixP->fx_subsy; |
1680 | add_number = fixP->fx_offset; | |
1681 | pcrel = fixP->fx_pcrel; | |
1682 | ||
1683 | if (add_symbolP) | |
43ca9aa6 | 1684 | add_symbol_segment = S_GET_SEGMENT (add_symbolP); |
6efd877d KR |
1685 | |
1686 | if (sub_symbolP) | |
1687 | { | |
1688 | if (!add_symbolP) | |
1689 | { | |
1690 | /* Its just -sym */ | |
43ca9aa6 KR |
1691 | if (S_GET_SEGMENT (sub_symbolP) != absolute_section) |
1692 | as_bad ("Negative of non-absolute symbol %s", | |
1693 | S_GET_NAME (sub_symbolP)); | |
6efd877d KR |
1694 | |
1695 | add_number -= S_GET_VALUE (sub_symbolP); | |
6efd877d KR |
1696 | } |
1697 | else if ((S_GET_SEGMENT (sub_symbolP) == add_symbol_segment) | |
1698 | && (SEG_NORMAL (add_symbol_segment) | |
43ca9aa6 | 1699 | || (add_symbol_segment == absolute_section))) |
6efd877d | 1700 | { |
43ca9aa6 KR |
1701 | /* Difference of 2 symbols from same segment. |
1702 | Can't make difference of 2 undefineds: 'value' means | |
1703 | something different for N_UNDF. */ | |
fecd2382 | 1704 | #ifdef TC_I960 |
6efd877d | 1705 | /* Makes no sense to use the difference of 2 arbitrary symbols |
43ca9aa6 | 1706 | as the target of a call instruction. */ |
6efd877d KR |
1707 | if (fixP->fx_callj) |
1708 | { | |
1709 | as_bad ("callj to difference of 2 symbols"); | |
1710 | } | |
1711 | #endif /* TC_I960 */ | |
1712 | add_number += S_GET_VALUE (add_symbolP) - | |
1713 | S_GET_VALUE (sub_symbolP); | |
1714 | ||
1715 | add_symbolP = NULL; | |
1716 | fixP->fx_addsy = NULL; | |
1717 | } | |
1718 | else | |
1719 | { | |
1720 | /* Different segments in subtraction. */ | |
43ca9aa6 KR |
1721 | know (!(S_IS_EXTERNAL (sub_symbolP) |
1722 | && (S_GET_SEGMENT (sub_symbolP) == absolute_section))); | |
6efd877d | 1723 | |
43ca9aa6 | 1724 | if ((S_GET_SEGMENT (sub_symbolP) == absolute_section)) |
6efd877d KR |
1725 | { |
1726 | add_number -= S_GET_VALUE (sub_symbolP); | |
1727 | } | |
1728 | else | |
1729 | { | |
d5364748 KR |
1730 | char buf[50]; |
1731 | sprint_value (buf, fragP->fr_address + where); | |
1732 | as_bad ("Can't emit reloc {- %s-seg symbol \"%s\"} @ file address %s.", | |
6efd877d | 1733 | segment_name (S_GET_SEGMENT (sub_symbolP)), |
d5364748 KR |
1734 | S_GET_NAME (sub_symbolP), buf); |
1735 | } | |
6efd877d | 1736 | } |
d5364748 | 1737 | } |
6efd877d KR |
1738 | |
1739 | if (add_symbolP) | |
1740 | { | |
1741 | if (add_symbol_segment == this_segment_type && pcrel) | |
1742 | { | |
1743 | /* | |
43ca9aa6 KR |
1744 | * This fixup was made when the symbol's segment was |
1745 | * SEG_UNKNOWN, but it is now in the local segment. | |
1746 | * So we know how to do the address without relocation. | |
1747 | */ | |
fecd2382 | 1748 | #ifdef TC_I960 |
43ca9aa6 KR |
1749 | /* reloc_callj() may replace a 'call' with a 'calls' or a |
1750 | 'bal', in which cases it modifies *fixP as appropriate. | |
1751 | In the case of a 'calls', no further work is required, | |
1752 | and *fixP has been set up to make the rest of the code | |
1753 | below a no-op. */ | |
6efd877d | 1754 | reloc_callj (fixP); |
fecd2382 | 1755 | #endif /* TC_I960 */ |
6efd877d KR |
1756 | |
1757 | add_number += S_GET_VALUE (add_symbolP); | |
1758 | add_number -= md_pcrel_from (fixP); | |
1759 | pcrel = 0; /* Lie. Don't want further pcrel processing. */ | |
1760 | fixP->fx_addsy = NULL; /* No relocations please. */ | |
1761 | } | |
1762 | else | |
1763 | { | |
43ca9aa6 | 1764 | if (add_symbol_segment == absolute_section) |
6efd877d | 1765 | { |
fecd2382 | 1766 | #ifdef TC_I960 |
43ca9aa6 KR |
1767 | /* See comment about reloc_callj() above. */ |
1768 | reloc_callj (fixP); | |
fecd2382 | 1769 | #endif /* TC_I960 */ |
6efd877d KR |
1770 | add_number += S_GET_VALUE (add_symbolP); |
1771 | fixP->fx_addsy = NULL; | |
1772 | add_symbolP = NULL; | |
43ca9aa6 KR |
1773 | } |
1774 | else if (add_symbol_segment == undefined_section | |
1775 | #ifdef BFD_ASSEMBLER | |
1776 | || add_symbol_segment == &bfd_com_section | |
1777 | #endif | |
1778 | ) | |
1779 | { | |
fecd2382 | 1780 | #ifdef TC_I960 |
6efd877d KR |
1781 | if ((int) fixP->fx_bit_fixP == 13) |
1782 | { | |
1783 | /* This is a COBR instruction. They have only a | |
43ca9aa6 KR |
1784 | * 13-bit displacement and are only to be used |
1785 | * for local branches: flag as error, don't generate | |
1786 | * relocation. | |
1787 | */ | |
6efd877d KR |
1788 | as_bad ("can't use COBR format with external label"); |
1789 | fixP->fx_addsy = NULL; /* No relocations please. */ | |
1790 | continue; | |
1791 | } /* COBR */ | |
fecd2382 | 1792 | #endif /* TC_I960 */ |
6d5460ab | 1793 | |
fecd2382 | 1794 | #ifdef OBJ_COFF |
c593cf41 | 1795 | #ifdef TE_I386AIX |
6efd877d KR |
1796 | if (S_IS_COMMON (add_symbolP)) |
1797 | add_number += S_GET_VALUE (add_symbolP); | |
c593cf41 | 1798 | #endif /* TE_I386AIX */ |
fecd2382 | 1799 | #endif /* OBJ_COFF */ |
6efd877d | 1800 | ++seg_reloc_count; |
43ca9aa6 KR |
1801 | } |
1802 | else | |
1803 | { | |
1804 | seg_reloc_count++; | |
1805 | add_number += S_GET_VALUE (add_symbolP); | |
1806 | } | |
6efd877d KR |
1807 | } /* if not in local seg */ |
1808 | } /* if there was a + symbol */ | |
1809 | ||
1810 | if (pcrel) | |
1811 | { | |
1812 | add_number -= md_pcrel_from (fixP); | |
1813 | if (add_symbolP == 0) | |
1814 | { | |
1815 | fixP->fx_addsy = &abs_symbol; | |
1816 | ++seg_reloc_count; | |
1817 | } /* if there's an add_symbol */ | |
1818 | } /* if pcrel */ | |
1819 | ||
1820 | if (!fixP->fx_bit_fixP) | |
1821 | { | |
d5364748 KR |
1822 | if ((size == 1 |
1823 | && (add_number & ~0xFF) | |
43ca9aa6 KR |
1824 | && ((add_number & ~0xFF) != (-1 & ~0xFF))) |
1825 | || (size == 2 | |
1826 | && (add_number & ~0xFFFF) | |
d5364748 KR |
1827 | && ((add_number & ~0xFFFF) != (-1 & ~0xFFFF))) |
1828 | || (size == 4 | |
1829 | && (add_number & ~(valueT)0xFFFFFFFF) | |
1830 | && ((add_number & ~(valueT)0xFFFFFFFF) != (-1 & ~(valueT)0xFFFFFFFF))) | |
1831 | ) | |
6efd877d | 1832 | { |
d5364748 KR |
1833 | char buf[50]; |
1834 | sprint_value (buf, fragP->fr_address + where); | |
1835 | as_bad ("Value of %d too large for field of %d bytes at %s", | |
1836 | add_number, size, buf); | |
6efd877d KR |
1837 | } /* generic error checking */ |
1838 | #ifdef WARN_SIGNED_OVERFLOW_WORD | |
43ca9aa6 KR |
1839 | /* Warn if a .word value is too large when treated as a signed |
1840 | number. We already know it is not too negative. This is to | |
1841 | catch over-large switches generated by gcc on the 68k. */ | |
6efd877d KR |
1842 | if (!flagseen['J'] |
1843 | && size == 2 | |
1844 | && add_number > 0x7fff) | |
1845 | as_bad ("Signed .word overflow; switch may be too large; %d at 0x%x", | |
1846 | add_number, fragP->fr_address + where); | |
1847 | #endif | |
1848 | } /* not a bit fix */ | |
1849 | ||
43ca9aa6 KR |
1850 | #ifdef BFD_ASSEMBLER |
1851 | md_apply_fix (fixP, &add_number); | |
1852 | #else | |
6efd877d | 1853 | md_apply_fix (fixP, add_number); |
43ca9aa6 | 1854 | #endif |
6efd877d KR |
1855 | } /* For each fixS in this segment. */ |
1856 | ||
fecd2382 RP |
1857 | #ifdef OBJ_COFF |
1858 | #ifdef TC_I960 | |
6efd877d KR |
1859 | { |
1860 | fixS *topP = fixP; | |
1861 | ||
1862 | /* two relocs per callj under coff. */ | |
1863 | for (fixP = topP; fixP; fixP = fixP->fx_next) | |
1864 | { | |
1865 | if (fixP->fx_callj && fixP->fx_addsy != 0) | |
1866 | { | |
1867 | ++seg_reloc_count; | |
1868 | } /* if callj and not already fixed. */ | |
1869 | } /* for each fix */ | |
1870 | } | |
fecd2382 | 1871 | #endif /* TC_I960 */ |
6efd877d | 1872 | |
fecd2382 | 1873 | #endif /* OBJ_COFF */ |
6efd877d | 1874 | return (seg_reloc_count); |
d5364748 | 1875 | } |
fecd2382 | 1876 | |
fecd2382 | 1877 | /* end of write.c */ |