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 | ||
5ac34ac3 ILT |
61 | static fixS *fix_new_internal PARAMS ((fragS *, int where, short int size, |
62 | symbolS *add, symbolS *sub, | |
63 | offsetT offset, int pcrel, | |
64 | #ifdef BFD_ASSEMBLER | |
65 | bfd_reloc_code_real_type r_type | |
66 | #else | |
67 | int r_type | |
68 | #endif | |
69 | )); | |
6efd877d | 70 | static long fixup_segment PARAMS ((fixS * fixP, segT this_segment_type)); |
d5364748 | 71 | static relax_addressT relax_align PARAMS ((relax_addressT addr, int align)); |
6efd877d | 72 | void relax_segment PARAMS ((struct frag * seg_frag_root, segT seg_type)); |
fecd2382 RP |
73 | |
74 | /* | |
75 | * fix_new() | |
76 | * | |
77 | * Create a fixS in obstack 'notes'. | |
78 | */ | |
5ac34ac3 ILT |
79 | static fixS * |
80 | fix_new_internal (frag, where, size, add_symbol, sub_symbol, offset, pcrel, | |
81 | r_type) | |
6efd877d KR |
82 | fragS *frag; /* Which frag? */ |
83 | int where; /* Where in that frag? */ | |
84 | short int size; /* 1, 2, or 4 usually. */ | |
85 | symbolS *add_symbol; /* X_add_symbol. */ | |
5ac34ac3 | 86 | symbolS *sub_symbol; /* X_op_symbol. */ |
d5364748 | 87 | offsetT offset; /* X_add_number. */ |
6efd877d | 88 | int pcrel; /* TRUE if PC-relative relocation. */ |
43ca9aa6 KR |
89 | #ifdef BFD_ASSEMBLER |
90 | bfd_reloc_code_real_type r_type; /* Relocation type */ | |
91 | #else | |
6efd877d | 92 | int r_type; /* Relocation type */ |
43ca9aa6 | 93 | #endif |
fecd2382 | 94 | { |
6efd877d KR |
95 | fixS *fixP; |
96 | ||
97 | fixP = (fixS *) obstack_alloc (¬es, sizeof (fixS)); | |
98 | ||
99 | fixP->fx_frag = frag; | |
100 | fixP->fx_where = where; | |
101 | fixP->fx_size = size; | |
102 | fixP->fx_addsy = add_symbol; | |
103 | fixP->fx_subsy = sub_symbol; | |
104 | fixP->fx_offset = offset; | |
105 | fixP->fx_pcrel = pcrel; | |
43ca9aa6 | 106 | #if defined(NEED_FX_R_TYPE) || defined (BFD_ASSEMBLER) |
6efd877d | 107 | fixP->fx_r_type = r_type; |
c593cf41 | 108 | #endif |
6efd877d KR |
109 | fixP->fx_im_disp = 0; |
110 | fixP->fx_pcrel_adjust = 0; | |
6efd877d | 111 | fixP->fx_bit_fixP = 0; |
43ca9aa6 KR |
112 | fixP->fx_addnumber = 0; |
113 | ||
114 | #ifdef TC_something | |
115 | fixP->fx_bsr = 0; | |
116 | #endif | |
117 | #ifdef TC_I960 | |
118 | fixP->fx_callj = 0; | |
119 | #endif | |
120 | ||
121 | /* Usually, we want relocs sorted numerically, but while | |
122 | comparing to older versions of gas that have relocs | |
123 | reverse sorted, it is convenient to have this compile | |
124 | time option. xoxorich. */ | |
125 | ||
126 | { | |
6efd877d | 127 | |
43ca9aa6 KR |
128 | #ifdef BFD_ASSEMBLER |
129 | fixS **seg_fix_rootP = & (seg_info (now_seg)->fix_root); | |
130 | fixS **seg_fix_tailP = & (seg_info (now_seg)->fix_tail); | |
131 | #endif | |
09952cd9 | 132 | |
f6e504fe | 133 | #ifdef REVERSE_SORT_RELOCS |
6efd877d | 134 | |
43ca9aa6 KR |
135 | fixP->fx_next = *seg_fix_rootP; |
136 | *seg_fix_rootP = fixP; | |
6efd877d | 137 | |
f6e504fe | 138 | #else /* REVERSE_SORT_RELOCS */ |
6efd877d | 139 | |
43ca9aa6 | 140 | fixP->fx_next = NULL; |
6efd877d | 141 | |
43ca9aa6 KR |
142 | if (*seg_fix_tailP) |
143 | (*seg_fix_tailP)->fx_next = fixP; | |
144 | else | |
145 | *seg_fix_rootP = fixP; | |
146 | *seg_fix_tailP = fixP; | |
6efd877d | 147 | |
f6e504fe | 148 | #endif /* REVERSE_SORT_RELOCS */ |
6efd877d | 149 | |
43ca9aa6 KR |
150 | } |
151 | ||
152 | return fixP; | |
153 | } | |
154 | ||
5ac34ac3 ILT |
155 | /* Create a fixup relative to a symbol (plus a constant). */ |
156 | ||
157 | fixS * | |
158 | fix_new (frag, where, size, add_symbol, offset, pcrel, r_type) | |
159 | fragS *frag; /* Which frag? */ | |
160 | int where; /* Where in that frag? */ | |
161 | short int size; /* 1, 2, or 4 usually. */ | |
162 | symbolS *add_symbol; /* X_add_symbol. */ | |
163 | offsetT offset; /* X_add_number. */ | |
164 | int pcrel; /* TRUE if PC-relative relocation. */ | |
165 | #ifdef BFD_ASSEMBLER | |
166 | bfd_reloc_code_real_type r_type; /* Relocation type */ | |
167 | #else | |
168 | int r_type; /* Relocation type */ | |
169 | #endif | |
170 | { | |
171 | return fix_new_internal (frag, where, size, add_symbol, | |
172 | (symbolS *) NULL, offset, pcrel, r_type); | |
173 | } | |
174 | ||
175 | /* Create a fixup for an expression. Currently we only support fixups | |
176 | for difference expressions. That is itself more than most object | |
177 | file formats support anyhow. */ | |
178 | ||
179 | fixS * | |
180 | fix_new_exp (frag, where, size, exp, pcrel, r_type) | |
181 | fragS *frag; /* Which frag? */ | |
182 | int where; /* Where in that frag? */ | |
183 | short int size; /* 1, 2, or 4 usually. */ | |
184 | expressionS *exp; /* Expression. */ | |
185 | int pcrel; /* TRUE if PC-relative relocation. */ | |
186 | #ifdef BFD_ASSEMBLER | |
187 | bfd_reloc_code_real_type r_type; /* Relocation type */ | |
188 | #else | |
189 | int r_type; /* Relocation type */ | |
190 | #endif | |
191 | { | |
192 | symbolS *add = NULL; | |
193 | symbolS *sub = NULL; | |
194 | offsetT off = 0; | |
195 | ||
196 | switch (exp->X_op) | |
197 | { | |
198 | case O_absent: | |
199 | break; | |
200 | ||
201 | case O_subtract: | |
202 | sub = exp->X_op_symbol; | |
203 | /* Fall through. */ | |
204 | case O_symbol: | |
205 | add = exp->X_add_symbol; | |
206 | /* Fall through. */ | |
207 | case O_constant: | |
208 | off = exp->X_add_number; | |
209 | break; | |
210 | ||
211 | default: | |
212 | as_bad ("expression too complex for fixup"); | |
213 | } | |
214 | ||
215 | return fix_new_internal (frag, where, size, add, sub, off, | |
216 | pcrel, r_type); | |
217 | } | |
218 | ||
43ca9aa6 KR |
219 | /* Append a string onto another string, bumping the pointer along. */ |
220 | void | |
221 | append (charPP, fromP, length) | |
222 | char **charPP; | |
223 | char *fromP; | |
224 | unsigned long length; | |
225 | { | |
226 | /* Don't trust memcpy() of 0 chars. */ | |
227 | if (length == 0) | |
228 | return; | |
229 | ||
230 | memcpy (*charPP, fromP, (int) length); | |
231 | *charPP += length; | |
232 | } | |
233 | ||
234 | #ifndef BFD_ASSEMBLER | |
235 | int section_alignment[SEG_MAXIMUM_ORDINAL]; | |
236 | #endif | |
237 | ||
238 | /* | |
239 | * This routine records the largest alignment seen for each segment. | |
240 | * If the beginning of the segment is aligned on the worst-case | |
241 | * boundary, all of the other alignments within it will work. At | |
242 | * least one object format really uses this info. | |
243 | */ | |
244 | void | |
245 | record_alignment (seg, align) | |
246 | /* Segment to which alignment pertains */ | |
247 | segT seg; | |
248 | /* Alignment, as a power of 2 (e.g., 1 => 2-byte boundary, 2 => 4-byte | |
249 | boundary, etc.) */ | |
250 | int align; | |
251 | { | |
252 | #ifdef BFD_ASSEMBLER | |
253 | if (align > bfd_get_section_alignment (stdoutput, seg)) | |
254 | bfd_set_section_alignment (stdoutput, seg, align); | |
255 | #else | |
256 | if (align > section_alignment[(int) seg]) | |
257 | section_alignment[(int) seg] = align; | |
258 | #endif | |
259 | } | |
260 | ||
261 | #if defined (BFD_ASSEMBLER) || ! defined (BFD) | |
262 | ||
263 | static fragS * | |
264 | chain_frchains_together_1 (section, frchp) | |
265 | segT section; | |
266 | struct frchain *frchp; | |
267 | { | |
268 | fragS dummy, *prev_frag = &dummy; | |
269 | for (; frchp && frchp->frch_seg == section; frchp = frchp->frch_next) | |
270 | { | |
271 | prev_frag->fr_next = frchp->frch_root; | |
272 | prev_frag = frchp->frch_last; | |
273 | } | |
274 | prev_frag->fr_next = 0; | |
275 | return prev_frag; | |
276 | } | |
277 | ||
278 | #endif | |
279 | ||
280 | #ifdef BFD_ASSEMBLER | |
281 | ||
282 | static void | |
283 | chain_frchains_together (abfd, section, xxx) | |
284 | bfd *abfd; /* unused */ | |
285 | segT section; | |
286 | char *xxx; /* unused */ | |
287 | { | |
f2f7d044 ILT |
288 | segment_info_type *info; |
289 | ||
290 | /* BFD may have introduced its own sections without using | |
291 | subseg_new, so it is possible that seg_info is NULL. */ | |
292 | info = seg_info (section); | |
293 | if (info != (segment_info_type *) NULL) | |
294 | chain_frchains_together_1 (section, info->frchainP); | |
43ca9aa6 KR |
295 | } |
296 | ||
297 | #endif | |
542e1629 | 298 | |
d5364748 | 299 | #if !defined (BFD) && !defined (BFD_ASSEMBLER) |
65bfcf2e | 300 | |
6efd877d KR |
301 | void |
302 | remove_subsegs (head, seg, root, last) | |
303 | frchainS *head; | |
304 | int seg; | |
305 | fragS **root; | |
306 | fragS **last; | |
65bfcf2e | 307 | { |
65bfcf2e | 308 | *root = head->frch_root; |
43ca9aa6 KR |
309 | *last = chain_frchains_together_1 (seg, head); |
310 | } | |
311 | ||
312 | #endif /* BFD */ | |
313 | ||
43ca9aa6 KR |
314 | static void |
315 | cvt_frag_to_fill (x, fragP) | |
316 | #ifdef BFD_ASSEMBLER | |
317 | segT x; | |
318 | #else | |
319 | object_headers *x; | |
320 | #endif | |
321 | fragS *fragP; | |
322 | { | |
323 | #ifdef BFD_ASSEMBLER | |
324 | segT sec = x; | |
325 | #else | |
326 | object_headers *headers = x; | |
327 | #endif | |
328 | ||
329 | switch (fragP->fr_type) | |
6efd877d | 330 | { |
43ca9aa6 KR |
331 | case rs_align: |
332 | case rs_org: | |
333 | #ifdef HANDLE_ALIGN | |
334 | HANDLE_ALIGN (fragP); | |
335 | #endif | |
336 | fragP->fr_type = rs_fill; | |
337 | know (fragP->fr_var == 1); | |
338 | know (fragP->fr_next != NULL); | |
339 | ||
340 | fragP->fr_offset = (fragP->fr_next->fr_address | |
341 | - fragP->fr_address | |
342 | - fragP->fr_fix); | |
343 | break; | |
65bfcf2e | 344 | |
43ca9aa6 KR |
345 | case rs_fill: |
346 | break; | |
347 | ||
348 | case rs_machine_dependent: | |
349 | #ifdef BFD_ASSEMBLER | |
350 | md_convert_frag (stdoutput, sec, fragP); | |
351 | #else | |
352 | md_convert_frag (headers, fragP); | |
353 | #endif | |
354 | ||
d5364748 | 355 | assert (fragP->fr_next == NULL || (fragP->fr_next->fr_address - fragP->fr_address == fragP->fr_fix)); |
43ca9aa6 KR |
356 | |
357 | /* | |
358 | * After md_convert_frag, we make the frag into a ".space 0". | |
359 | * Md_convert_frag() should set up any fixSs and constants | |
360 | * required. | |
361 | */ | |
362 | frag_wane (fragP); | |
363 | break; | |
364 | ||
365 | #ifndef WORKING_DOT_WORD | |
366 | case rs_broken_word: | |
367 | { | |
368 | struct broken_word *lie; | |
369 | ||
370 | if (fragP->fr_subtype) | |
371 | { | |
372 | fragP->fr_fix += md_short_jump_size; | |
373 | for (lie = (struct broken_word *) (fragP->fr_symbol); | |
374 | lie && lie->dispfrag == fragP; | |
375 | lie = lie->next_broken_word) | |
376 | if (lie->added == 1) | |
377 | fragP->fr_fix += md_long_jump_size; | |
378 | } | |
379 | frag_wane (fragP); | |
380 | } | |
381 | break; | |
382 | #endif | |
383 | ||
384 | default: | |
385 | BAD_CASE (fragP->fr_type); | |
386 | break; | |
6efd877d | 387 | } |
65bfcf2e | 388 | } |
6efd877d | 389 | |
43ca9aa6 KR |
390 | #ifdef BFD_ASSEMBLER |
391 | static void | |
392 | relax_and_size_seg (abfd, sec, xxx) | |
393 | bfd *abfd; | |
394 | asection *sec; | |
395 | char *xxx; | |
396 | { | |
397 | flagword flags; | |
398 | ||
399 | flags = bfd_get_section_flags (abfd, sec); | |
400 | ||
d5364748 | 401 | if (/*flags & SEC_ALLOC*/ 1) |
43ca9aa6 KR |
402 | { |
403 | fragS *fragp; | |
404 | segment_info_type *seginfo; | |
405 | int x; | |
d5364748 | 406 | valueT size, newsize; |
43ca9aa6 KR |
407 | |
408 | seginfo = (segment_info_type *) bfd_get_section_userdata (abfd, sec); | |
d5364748 KR |
409 | if (seginfo && seginfo->frchainP) |
410 | { | |
411 | relax_segment (seginfo->frchainP->frch_root, sec); | |
412 | for (fragp = seginfo->frchainP->frch_root; fragp; fragp = fragp->fr_next) | |
413 | cvt_frag_to_fill (sec, fragp); | |
414 | for (fragp = seginfo->frchainP->frch_root; | |
415 | fragp->fr_next; | |
416 | fragp = fragp->fr_next) | |
417 | /* walk to last elt */; | |
418 | size = fragp->fr_address + fragp->fr_fix; | |
419 | } | |
420 | else | |
421 | size = 0; | |
43ca9aa6 KR |
422 | if (size > 0) |
423 | { | |
424 | flags |= SEC_HAS_CONTENTS; | |
425 | /* @@ This is just an approximation. */ | |
426 | if (seginfo->fix_root) | |
427 | flags |= SEC_RELOC; | |
d5364748 KR |
428 | else |
429 | flags &= ~SEC_RELOC; | |
43ca9aa6 KR |
430 | x = bfd_set_section_flags (abfd, sec, flags); |
431 | assert (x == true); | |
432 | } | |
433 | size = md_section_align (sec, size); | |
434 | x = bfd_set_section_size (abfd, sec, size); | |
435 | assert (x == true); | |
436 | ||
437 | /* If the size had to be rounded up, add some padding in the last | |
438 | non-empty frag. */ | |
439 | newsize = bfd_get_section_size_before_reloc (sec); | |
440 | assert (newsize >= size); | |
441 | if (size != newsize) | |
442 | { | |
443 | fragS *last = seginfo->frchainP->frch_last; | |
444 | fragp = seginfo->frchainP->frch_root; | |
445 | while (fragp->fr_next != last) | |
446 | fragp = fragp->fr_next; | |
447 | last->fr_address = size; | |
448 | fragp->fr_offset += newsize - size; | |
449 | } | |
450 | } | |
451 | #ifdef tc_frob_section | |
452 | tc_frob_section (sec); | |
453 | #endif | |
454 | #ifdef obj_frob_section | |
455 | obj_frob_section (sec); | |
456 | #endif | |
457 | } | |
458 | ||
d5364748 KR |
459 | #ifdef DEBUG2 |
460 | static void | |
461 | dump_section_relocs (abfd, sec, stream_) | |
462 | bfd *abfd; | |
463 | asection *sec; | |
464 | char *stream_; | |
465 | { | |
466 | FILE *stream = (FILE *) stream_; | |
467 | segment_info_type *seginfo = seg_info (sec); | |
468 | fixS *fixp = seginfo->fix_root; | |
469 | ||
470 | if (!fixp) | |
471 | return; | |
472 | ||
473 | fprintf (stream, "sec %s relocs:\n", sec->name); | |
474 | while (fixp) | |
475 | { | |
476 | symbolS *s = fixp->fx_addsy; | |
477 | if (s) | |
478 | fprintf (stream, " %08x: %s(%s+%x)+%x\n", fixp, | |
479 | S_GET_NAME (s), s->bsym->section->name, | |
480 | S_GET_VALUE (s), fixp->fx_offset); | |
481 | else | |
482 | fprintf (stream, " %08x: type %d no sym\n", fixp, fixp->fx_r_type); | |
483 | fixp = fixp->fx_next; | |
484 | } | |
485 | } | |
486 | #else | |
487 | #define dump_section_relocs(ABFD,SEC,STREAM) (void)(ABFD,SEC,STREAM) | |
488 | #endif | |
489 | ||
490 | static void | |
491 | adjust_reloc_syms (abfd, sec, xxx) | |
492 | bfd *abfd; | |
493 | asection *sec; | |
494 | char *xxx; | |
495 | { | |
496 | segment_info_type *seginfo = seg_info (sec); | |
497 | fixS *fixp; | |
498 | ||
499 | if (seginfo == NULL) | |
500 | return; | |
501 | ||
502 | dump_section_relocs (abfd, sec, stderr); | |
503 | ||
504 | for (fixp = seginfo->fix_root; fixp; fixp = fixp->fx_next) | |
505 | if (fixp->fx_addsy) | |
506 | { | |
507 | symbolS *sym = fixp->fx_addsy; | |
508 | asection *symsec = sym->bsym->section; | |
509 | segment_info_type *symseginfo = seg_info (symsec); | |
510 | ||
511 | /* If it's one of these sections, assume the symbol is definitely | |
512 | going to be output. */ | |
513 | if (symsec == &bfd_und_section | |
514 | || symsec == &bfd_abs_section | |
515 | || bfd_is_com_section (symsec)) | |
516 | continue; | |
517 | ||
518 | /* Since we're reducing to section symbols, don't attempt to reduce | |
519 | anything that's already using one. */ | |
520 | if (sym->bsym == symsec->symbol) | |
521 | continue; | |
522 | ||
523 | /* Is there some other reason we can't adjust this one? (E.g., | |
524 | call/bal links in i960-bout symbols.) */ | |
525 | #ifdef obj_fix_adjustable | |
526 | if (! obj_fix_adjustable (fixp)) | |
527 | continue; | |
528 | #endif | |
529 | /* If the section symbol isn't going to be output, the relocs | |
530 | at least should still work. If not, figure out what to do | |
531 | when we run into that case. */ | |
532 | fixp->fx_offset += S_GET_VALUE (sym); | |
533 | if (sym->sy_frag) | |
534 | fixp->fx_offset += sym->sy_frag->fr_address; | |
535 | if (symseginfo->sym) | |
536 | fixp->fx_addsy = symseginfo->sym; | |
537 | else | |
538 | { | |
539 | fixp->fx_addsy = symbol_find (symsec->name); | |
540 | if (!fixp->fx_addsy) | |
541 | { | |
542 | fixp->fx_addsy = symbol_make (symsec->name); | |
543 | fixp->fx_addsy->bsym = symsec->symbol; | |
544 | } | |
545 | symseginfo->sym = fixp->fx_addsy; | |
546 | } | |
547 | } | |
548 | ||
549 | dump_section_relocs (abfd, sec, stderr); | |
550 | } | |
551 | ||
43ca9aa6 | 552 | static void |
8d6c34a1 | 553 | write_relocs (abfd, sec, xxx) |
43ca9aa6 KR |
554 | bfd *abfd; |
555 | asection *sec; | |
556 | char *xxx; | |
557 | { | |
558 | segment_info_type *seginfo = seg_info (sec); | |
559 | unsigned long offset = 0; | |
560 | fragS *frags; | |
561 | int i, n; | |
562 | arelent **relocs; | |
563 | fixS *fixp; | |
564 | ||
d5364748 KR |
565 | /* If seginfo is NULL, we did not create this section; don't do |
566 | anything with it. */ | |
567 | if (seginfo == NULL) | |
43ca9aa6 KR |
568 | return; |
569 | ||
570 | fixup_segment (seginfo->fix_root, sec); | |
571 | ||
3d3c5039 | 572 | n = 0; |
d5364748 KR |
573 | for (fixp = seginfo->fix_root; fixp; fixp = fixp->fx_next) |
574 | n++; | |
43ca9aa6 | 575 | |
d5364748 | 576 | #ifndef RELOC_EXPANSION_POSSIBLE |
43ca9aa6 | 577 | /* Set up reloc information as well. */ |
43ca9aa6 KR |
578 | relocs = (arelent **) bfd_alloc_by_size_t (stdoutput, |
579 | n * sizeof (arelent *)); | |
8d6c34a1 | 580 | memset ((char*)relocs, 0, n * sizeof (arelent*)); |
43ca9aa6 | 581 | |
3d3c5039 ILT |
582 | i = 0; |
583 | for (fixp = seginfo->fix_root; fixp != (fixS *) NULL; fixp = fixp->fx_next) | |
584 | { | |
585 | arelent *reloc; | |
586 | extern arelent *tc_gen_reloc (); | |
587 | char *data; | |
588 | bfd_reloc_status_type s; | |
589 | ||
590 | if (fixp->fx_addsy == 0) | |
591 | { | |
592 | /* @@ Need some other flag to indicate which have already | |
593 | been performed... */ | |
594 | n--; | |
595 | continue; | |
596 | } | |
597 | reloc = tc_gen_reloc (sec, fixp); | |
598 | if (!reloc) | |
599 | { | |
600 | n--; | |
601 | continue; | |
602 | } | |
603 | data = fixp->fx_frag->fr_literal + fixp->fx_where; | |
8d6c34a1 | 604 | /* @@ Assumes max size of reloc is 4. */ |
3d3c5039 ILT |
605 | if (fixp->fx_where + 4 |
606 | > fixp->fx_frag->fr_fix + fixp->fx_frag->fr_offset) | |
607 | abort (); | |
d5364748 KR |
608 | /* Pass bogus address so that when bfd_perform_relocation adds |
609 | `address' back in, it'll come up with `data', which is where | |
610 | we want it to operate. */ | |
3d3c5039 ILT |
611 | s = bfd_perform_relocation (stdoutput, reloc, data - reloc->address, |
612 | sec, stdoutput); | |
613 | switch (s) | |
614 | { | |
615 | case bfd_reloc_ok: | |
616 | break; | |
617 | default: | |
618 | as_fatal ("bad return from bfd_perform_relocation"); | |
619 | } | |
620 | relocs[i++] = reloc; | |
621 | } | |
d5364748 KR |
622 | #else |
623 | n = n * MAX_RELOC_EXPANSION; | |
624 | /* Set up reloc information as well. */ | |
625 | relocs = (arelent **) bfd_alloc_by_size_t (stdoutput, | |
626 | n * sizeof (arelent *)); | |
627 | ||
628 | i = 0; | |
629 | for (fixp = seginfo->fix_root; fixp != (fixS *) NULL; fixp = fixp->fx_next) | |
630 | { | |
631 | arelent **reloc; | |
632 | extern arelent *tc_gen_reloc (); | |
633 | char *data; | |
634 | bfd_reloc_status_type s; | |
635 | int j; | |
636 | ||
637 | if (fixp->fx_addsy == 0) | |
638 | { | |
639 | /* @@ Need some other flag to indicate which have already | |
640 | been performed... */ | |
641 | n--; | |
642 | continue; | |
643 | } | |
644 | reloc = tc_gen_reloc (sec, fixp); | |
645 | ||
646 | for (j = 0; reloc[j]; j++) | |
647 | { | |
648 | relocs[i++] = reloc[j]; | |
649 | assert(i <= n); | |
650 | } | |
651 | data = fixp->fx_frag->fr_literal + fixp->fx_where; | |
652 | if (fixp->fx_where + 4 | |
653 | > fixp->fx_frag->fr_fix + fixp->fx_frag->fr_offset) | |
654 | abort (); | |
655 | for (j = 0; reloc[j]; j++) | |
656 | { | |
657 | s = bfd_perform_relocation (stdoutput, reloc[j], data - reloc[j]->address, | |
658 | sec, stdoutput); | |
659 | switch (s) | |
660 | { | |
661 | case bfd_reloc_ok: | |
662 | break; | |
663 | default: | |
664 | as_fatal ("bad return from bfd_perform_relocation"); | |
665 | } | |
666 | } | |
667 | } | |
668 | n = i; | |
669 | #endif | |
670 | ||
3d3c5039 ILT |
671 | if (n) |
672 | bfd_set_reloc (stdoutput, sec, relocs, n); | |
d5364748 KR |
673 | else |
674 | bfd_set_section_flags (abfd, sec, | |
675 | bfd_get_section_flags (abfd, sec) & ~SEC_RELOC); | |
676 | #ifdef DEBUG2 | |
677 | { | |
678 | int i; | |
679 | arelent *r; | |
680 | asymbol *s; | |
681 | fprintf (stderr, "relocs for sec %s\n", sec->name); | |
682 | for (i = 0; i < n; i++) | |
683 | { | |
684 | r = relocs[i]; | |
685 | s = *r->sym_ptr_ptr; | |
686 | fprintf (stderr, " reloc %2d @%08x off %4x : sym %-10s addend %x\n", | |
687 | i, r, r->address, s->name, r->addend); | |
688 | } | |
689 | } | |
690 | #endif | |
8d6c34a1 | 691 | } |
d5364748 | 692 | |
8d6c34a1 KR |
693 | static void |
694 | write_contents (abfd, sec, xxx) | |
695 | bfd *abfd; | |
696 | asection *sec; | |
697 | char *xxx; | |
698 | { | |
699 | segment_info_type *seginfo = seg_info (sec); | |
700 | unsigned long offset = 0; | |
701 | fragS *frags; | |
702 | int i, n; | |
703 | arelent **relocs; | |
704 | fixS *fixp; | |
3d3c5039 ILT |
705 | |
706 | /* Write out the frags. */ | |
d5364748 KR |
707 | if (! (bfd_get_section_flags (abfd, sec) & SEC_HAS_CONTENTS)) |
708 | return; | |
709 | ||
8d6c34a1 KR |
710 | #if 0 /* Who cares? Let the first call, below, do it. */ |
711 | /* Force calculations (size, vma) to get done. */ | |
712 | bfd_set_section_contents (stdoutput, sec, "", 0, (addressT) 0); | |
713 | #endif | |
714 | ||
3d3c5039 | 715 | for (frags = seginfo->frchainP->frch_root; |
43ca9aa6 KR |
716 | frags; |
717 | frags = frags->fr_next) | |
718 | { | |
719 | int x; | |
720 | unsigned long fill_size; | |
721 | char *fill_literal; | |
722 | long count; | |
723 | ||
724 | assert (frags->fr_type == rs_fill); | |
43ca9aa6 KR |
725 | if (frags->fr_fix) |
726 | { | |
727 | x = bfd_set_section_contents (stdoutput, sec, | |
728 | frags->fr_literal, offset, | |
729 | frags->fr_fix); | |
730 | assert (x == true); | |
731 | offset += frags->fr_fix; | |
732 | } | |
733 | fill_literal = frags->fr_literal + frags->fr_fix; | |
734 | fill_size = frags->fr_var; | |
735 | count = frags->fr_offset; | |
736 | assert (count >= 0); | |
737 | if (fill_size && count) | |
738 | while (count--) | |
739 | { | |
740 | x = bfd_set_section_contents (stdoutput, sec, | |
d5364748 KR |
741 | fill_literal, offset, |
742 | (bfd_size_type) fill_size); | |
43ca9aa6 KR |
743 | assert (x == true); |
744 | offset += fill_size; | |
745 | } | |
746 | } | |
43ca9aa6 KR |
747 | } |
748 | #endif | |
749 | ||
d5364748 KR |
750 | #if defined (BFD_ASSEMBLER) || !defined (BFD) |
751 | ||
6efd877d KR |
752 | void |
753 | write_object_file () | |
45432836 | 754 | { |
6efd877d KR |
755 | register struct frchain *frchainP; /* Track along all frchains. */ |
756 | register fragS *fragP; /* Track along all frags. */ | |
6efd877d | 757 | |
d5364748 | 758 | #if !defined (BFD_ASSEMBLER) && !defined (OBJ_VMS) |
6efd877d | 759 | long object_file_size; |
d5364748 | 760 | #endif |
6efd877d | 761 | |
43ca9aa6 KR |
762 | /* Do we really want to write it? */ |
763 | { | |
764 | int n_warns, n_errs; | |
765 | n_warns = had_warnings (); | |
766 | n_errs = had_errors (); | |
767 | /* The -Z flag indicates that an object file should be generated, | |
768 | regardless of warnings and errors. */ | |
769 | if (flagseen['Z']) | |
770 | { | |
771 | if (n_warns || n_errs) | |
772 | as_warn ("%d error%s, %d warning%s, generating bad object file.\n", | |
773 | n_errs, n_errs == 1 ? "" : "s", | |
774 | n_warns, n_warns == 1 ? "" : "s"); | |
775 | } | |
776 | else | |
777 | { | |
778 | if (n_errs) | |
779 | as_fatal ("%d error%s, %d warning%s, no object file generated.\n", | |
780 | n_errs, n_errs == 1 ? "" : "s", | |
781 | n_warns, n_warns == 1 ? "" : "s"); | |
782 | } | |
783 | } | |
784 | ||
3eb802b5 | 785 | #ifdef OBJ_VMS |
6efd877d | 786 | /* |
3eb802b5 ILT |
787 | * Under VMS we try to be compatible with VAX-11 "C". Thus, we |
788 | * call a routine to check for the definition of the procedure | |
789 | * "_main", and if so -- fix it up so that it can be program | |
790 | * entry point. | |
791 | */ | |
6efd877d | 792 | VMS_Check_For_Main (); |
fecd2382 | 793 | #endif /* VMS */ |
43ca9aa6 KR |
794 | |
795 | /* After every sub-segment, we fake an ".align ...". This conforms to | |
796 | BSD4.2 brane-damage. We then fake ".fill 0" because that is the kind of | |
797 | frag that requires least thought. ".align" frags like to have a | |
798 | following frag since that makes calculating their intended length | |
799 | trivial. | |
800 | ||
801 | @@ Is this really necessary?? */ | |
3eb802b5 | 802 | #ifndef SUB_SEGMENT_ALIGN |
43ca9aa6 | 803 | #ifdef BFD_ASSEMBLER |
f2f7d044 | 804 | #define SUB_SEGMENT_ALIGN(SEG) (0) |
43ca9aa6 | 805 | #else |
f2f7d044 | 806 | #define SUB_SEGMENT_ALIGN(SEG) (2) |
43ca9aa6 | 807 | #endif |
3eb802b5 | 808 | #endif |
6efd877d KR |
809 | for (frchainP = frchain_root; frchainP; frchainP = frchainP->frch_next) |
810 | { | |
43ca9aa6 KR |
811 | #ifdef BFD_ASSEMBLER |
812 | subseg_set (frchainP->frch_seg, frchainP->frch_subseg); | |
813 | #else | |
6efd877d | 814 | subseg_new (frchainP->frch_seg, frchainP->frch_subseg); |
43ca9aa6 | 815 | #endif |
f2f7d044 | 816 | frag_align (SUB_SEGMENT_ALIGN (now_seg), NOP_OPCODE); |
43ca9aa6 KR |
817 | /* frag_align will have left a new frag. |
818 | Use this last frag for an empty ".fill". | |
819 | ||
820 | For this segment ... | |
821 | Create a last frag. Do not leave a "being filled in frag". */ | |
6efd877d KR |
822 | frag_wane (frag_now); |
823 | frag_now->fr_fix = 0; | |
824 | know (frag_now->fr_next == NULL); | |
825 | /* know( frags . obstack_c_base == frags . obstack_c_next_free ); */ | |
826 | /* Above shows we haven't left a half-completed object on obstack. */ | |
43ca9aa6 | 827 | } |
6efd877d | 828 | |
43ca9aa6 KR |
829 | /* From now on, we don't care about sub-segments. Build one frag chain |
830 | for each segment. Linked thru fr_next. */ | |
65bfcf2e | 831 | |
43ca9aa6 KR |
832 | #ifdef BFD_ASSEMBLER |
833 | /* Remove the sections created by gas for its own purposes. */ | |
834 | { | |
835 | asection **seclist, *sec; | |
836 | seclist = &stdoutput->sections; | |
837 | while (seclist && *seclist) | |
838 | { | |
839 | sec = *seclist; | |
5ac34ac3 | 840 | while (sec == reg_section || sec == expr_section) |
43ca9aa6 KR |
841 | { |
842 | sec = sec->next; | |
843 | *seclist = sec; | |
844 | stdoutput->section_count--; | |
845 | if (!sec) | |
846 | break; | |
847 | } | |
848 | if (*seclist) | |
849 | seclist = &(*seclist)->next; | |
850 | } | |
851 | } | |
852 | ||
853 | bfd_map_over_sections (stdoutput, chain_frchains_together, (char *) 0); | |
854 | #else | |
6efd877d KR |
855 | remove_subsegs (frchain_root, SEG_TEXT, &text_frag_root, &text_last_frag); |
856 | remove_subsegs (data0_frchainP, SEG_DATA, &data_frag_root, &data_last_frag); | |
857 | remove_subsegs (bss0_frchainP, SEG_BSS, &bss_frag_root, &bss_last_frag); | |
43ca9aa6 | 858 | #endif |
6efd877d | 859 | |
43ca9aa6 KR |
860 | /* We have two segments. If user gave -R flag, then we must put the |
861 | data frags into the text segment. Do this before relaxing so | |
862 | we know to take advantage of -R and make shorter addresses. */ | |
863 | #if !defined (OBJ_AOUT) || defined (BFD_ASSEMBLER) | |
6efd877d KR |
864 | if (flagseen['R']) |
865 | { | |
43ca9aa6 KR |
866 | #ifdef BFD_ASSEMBLER |
867 | seg_info (text_section)->frchainP->frch_last->fr_next = | |
868 | seg_info (data_section)->frchainP->frch_root; | |
869 | seg_info (text_section)->frchainP->frch_last = | |
870 | seg_info (data_section)->frchainP->frch_last; | |
871 | seg_info (data_section)->frchainP = 0; | |
872 | #else | |
6efd877d KR |
873 | fixS *tmp; |
874 | ||
875 | text_last_frag->fr_next = data_frag_root; | |
876 | text_last_frag = data_last_frag; | |
877 | data_last_frag = NULL; | |
878 | data_frag_root = NULL; | |
879 | if (text_fix_root) | |
880 | { | |
881 | for (tmp = text_fix_root; tmp->fx_next; tmp = tmp->fx_next);; | |
882 | tmp->fx_next = data_fix_root; | |
883 | text_fix_tail = data_fix_tail; | |
a39116f1 | 884 | } |
6efd877d KR |
885 | else |
886 | text_fix_root = data_fix_root; | |
887 | data_fix_root = NULL; | |
43ca9aa6 | 888 | #endif |
6efd877d KR |
889 | } |
890 | #endif | |
43ca9aa6 KR |
891 | |
892 | #ifdef BFD_ASSEMBLER | |
d5364748 | 893 | |
43ca9aa6 KR |
894 | bfd_map_over_sections (stdoutput, relax_and_size_seg, (char *) 0); |
895 | #else | |
6efd877d KR |
896 | relax_segment (text_frag_root, SEG_TEXT); |
897 | relax_segment (data_frag_root, SEG_DATA); | |
898 | relax_segment (bss_frag_root, SEG_BSS); | |
899 | /* | |
7f2cb270 KR |
900 | * Now the addresses of frags are correct within the segment. |
901 | */ | |
6efd877d KR |
902 | |
903 | know (text_last_frag->fr_type == rs_fill && text_last_frag->fr_offset == 0); | |
904 | H_SET_TEXT_SIZE (&headers, text_last_frag->fr_address); | |
905 | text_last_frag->fr_address = H_GET_TEXT_SIZE (&headers); | |
906 | ||
907 | /* | |
7f2cb270 KR |
908 | * Join the 2 segments into 1 huge segment. |
909 | * To do this, re-compute every rn_address in the SEG_DATA frags. | |
910 | * Then join the data frags after the text frags. | |
911 | * | |
912 | * Determine a_data [length of data segment]. | |
913 | */ | |
6efd877d KR |
914 | if (data_frag_root) |
915 | { | |
916 | register relax_addressT slide; | |
917 | ||
918 | know ((text_last_frag->fr_type == rs_fill) && (text_last_frag->fr_offset == 0)); | |
919 | ||
920 | H_SET_DATA_SIZE (&headers, data_last_frag->fr_address); | |
921 | data_last_frag->fr_address = H_GET_DATA_SIZE (&headers); | |
922 | slide = H_GET_TEXT_SIZE (&headers); /* & in file of the data segment. */ | |
ebfb4167 MT |
923 | #ifdef OBJ_BOUT |
924 | #define RoundUp(N,S) (((N)+(S)-1)&-(S)) | |
6efd877d | 925 | /* For b.out: If the data section has a strict alignment |
7f2cb270 KR |
926 | requirement, its load address in the .o file will be |
927 | rounded up from the size of the text section. These | |
928 | two values are *not* the same! Similarly for the bss | |
929 | section.... */ | |
6efd877d | 930 | slide = RoundUp (slide, 1 << section_alignment[SEG_DATA]); |
ebfb4167 MT |
931 | #endif |
932 | ||
6efd877d KR |
933 | for (fragP = data_frag_root; fragP; fragP = fragP->fr_next) |
934 | { | |
935 | fragP->fr_address += slide; | |
936 | } /* for each data frag */ | |
937 | ||
938 | know (text_last_frag != 0); | |
939 | text_last_frag->fr_next = data_frag_root; | |
940 | } | |
941 | else | |
942 | { | |
943 | H_SET_DATA_SIZE (&headers, 0); | |
6efd877d | 944 | } |
ebfb4167 MT |
945 | |
946 | #ifdef OBJ_BOUT | |
6efd877d KR |
947 | /* See above comments on b.out data section address. */ |
948 | { | |
949 | long bss_vma; | |
950 | if (data_last_frag == 0) | |
951 | bss_vma = H_GET_TEXT_SIZE (&headers); | |
952 | else | |
953 | bss_vma = data_last_frag->fr_address; | |
954 | bss_vma = RoundUp (bss_vma, 1 << section_alignment[SEG_BSS]); | |
955 | bss_address_frag.fr_address = bss_vma; | |
956 | } | |
43ca9aa6 | 957 | #else /* ! OBJ_BOUT */ |
6efd877d KR |
958 | bss_address_frag.fr_address = (H_GET_TEXT_SIZE (&headers) + |
959 | H_GET_DATA_SIZE (&headers)); | |
960 | ||
65bfcf2e | 961 | |
6efd877d KR |
962 | /* Slide all the frags */ |
963 | if (bss_frag_root) | |
964 | { | |
85825401 | 965 | relax_addressT slide = bss_address_frag.fr_address; |
09952cd9 | 966 | |
6efd877d | 967 | for (fragP = bss_frag_root; fragP; fragP = fragP->fr_next) |
65bfcf2e | 968 | { |
6efd877d KR |
969 | fragP->fr_address += slide; |
970 | } /* for each bss frag */ | |
971 | } | |
65bfcf2e | 972 | |
43ca9aa6 | 973 | #endif /* ! OBJ_BOUT */ |
85825401 | 974 | |
6efd877d | 975 | if (bss_last_frag) |
85825401 ILT |
976 | H_SET_BSS_SIZE (&headers, |
977 | bss_last_frag->fr_address - bss_frag_root->fr_address); | |
978 | else | |
979 | H_SET_BSS_SIZE (&headers, 0); | |
43ca9aa6 | 980 | #endif /* BFD_ASSEMBLER */ |
65bfcf2e | 981 | |
43ca9aa6 | 982 | #ifndef BFD_ASSEMBLER |
6efd877d | 983 | /* |
7f2cb270 KR |
984 | * |
985 | * Crawl the symbol chain. | |
986 | * | |
987 | * For each symbol whose value depends on a frag, take the address of | |
988 | * that frag and subsume it into the value of the symbol. | |
989 | * After this, there is just one way to lookup a symbol value. | |
990 | * Values are left in their final state for object file emission. | |
991 | * We adjust the values of 'L' local symbols, even if we do | |
992 | * not intend to emit them to the object file, because their values | |
993 | * are needed for fix-ups. | |
994 | * | |
995 | * Unless we saw a -L flag, remove all symbols that begin with 'L' | |
996 | * from the symbol chain. (They are still pointed to by the fixes.) | |
997 | * | |
998 | * Count the remaining symbols. | |
999 | * Assign a symbol number to each symbol. | |
1000 | * Count the number of string-table chars we will emit. | |
1001 | * Put this info into the headers as appropriate. | |
1002 | * | |
1003 | */ | |
6efd877d KR |
1004 | know (zero_address_frag.fr_address == 0); |
1005 | string_byte_count = sizeof (string_byte_count); | |
1006 | ||
1007 | obj_crawl_symbol_chain (&headers); | |
1008 | ||
1009 | if (string_byte_count == sizeof (string_byte_count)) | |
43ca9aa6 | 1010 | string_byte_count = 0; |
6efd877d KR |
1011 | |
1012 | H_SET_STRING_SIZE (&headers, string_byte_count); | |
1013 | ||
1014 | /* | |
7f2cb270 KR |
1015 | * Addresses of frags now reflect addresses we use in the object file. |
1016 | * Symbol values are correct. | |
1017 | * Scan the frags, converting any ".org"s and ".align"s to ".fill"s. | |
1018 | * Also converting any machine-dependent frags using md_convert_frag(); | |
1019 | */ | |
6efd877d KR |
1020 | subseg_change (SEG_TEXT, 0); |
1021 | ||
1022 | for (fragP = text_frag_root; fragP; fragP = fragP->fr_next) | |
1023 | { | |
43ca9aa6 | 1024 | cvt_frag_to_fill (&headers, fragP); |
6efd877d | 1025 | |
43ca9aa6 KR |
1026 | /* Some assert macros don't work with # directives mixed in. */ |
1027 | #ifndef NDEBUG | |
1028 | if (!(fragP->fr_next == NULL | |
ebfb4167 | 1029 | #ifdef OBJ_BOUT |
43ca9aa6 | 1030 | || fragP->fr_next == data_frag_root |
ebfb4167 | 1031 | #endif |
6efd877d | 1032 | || ((fragP->fr_next->fr_address - fragP->fr_address) |
43ca9aa6 KR |
1033 | == (fragP->fr_fix + fragP->fr_offset * fragP->fr_var)))) |
1034 | abort (); | |
1035 | #endif | |
1036 | } | |
1037 | #endif /* ! BFD_ASSEMBLER */ | |
6efd877d | 1038 | |
fecd2382 | 1039 | #ifndef WORKING_DOT_WORD |
6efd877d KR |
1040 | { |
1041 | struct broken_word *lie; | |
1042 | struct broken_word **prevP; | |
1043 | ||
1044 | prevP = &broken_words; | |
1045 | for (lie = broken_words; lie; lie = lie->next_broken_word) | |
1046 | if (!lie->added) | |
a39116f1 | 1047 | { |
5ac34ac3 ILT |
1048 | expressionS exp; |
1049 | ||
1050 | exp.X_op = O_subtract; | |
1051 | exp.X_add_symbol = lie->add; | |
1052 | exp.X_op_symbol = lie->sub; | |
1053 | exp.X_add_number = lie->addnum; | |
43ca9aa6 | 1054 | #ifdef BFD_ASSEMBLER |
5ac34ac3 ILT |
1055 | fix_new_exp (lie->frag, |
1056 | lie->word_goes_here - lie->frag->fr_literal, | |
1057 | 2, &exp, 0, BFD_RELOC_NONE); | |
43ca9aa6 KR |
1058 | #else |
1059 | #if defined(TC_SPARC) || defined(TC_A29K) || defined(NEED_FX_R_TYPE) | |
5ac34ac3 ILT |
1060 | fix_new_exp (lie->frag, |
1061 | lie->word_goes_here - lie->frag->fr_literal, | |
1062 | 2, &exp, 0, NO_RELOC); | |
43ca9aa6 | 1063 | #else |
fecd2382 | 1064 | #ifdef TC_NS32K |
5ac34ac3 ILT |
1065 | fix_new_ns32k_exp (lie->frag, |
1066 | lie->word_goes_here - lie->frag->fr_literal, | |
1067 | 2, &exp, 0, 0, 2, 0, 0); | |
343fb08d | 1068 | #else |
5ac34ac3 ILT |
1069 | fix_new_exp (lie->frag, |
1070 | lie->word_goes_here - lie->frag->fr_literal, | |
1071 | 2, &exp, 0, 0); | |
fecd2382 | 1072 | #endif /* TC_NS32K */ |
43ca9aa6 KR |
1073 | #endif /* TC_SPARC|TC_A29K|NEED_FX_R_TYPE */ |
1074 | #endif /* BFD_ASSEMBLER */ | |
6efd877d | 1075 | *prevP = lie->next_broken_word; |
a39116f1 | 1076 | } |
6efd877d KR |
1077 | else |
1078 | prevP = &(lie->next_broken_word); | |
1079 | ||
1080 | for (lie = broken_words; lie;) | |
1081 | { | |
1082 | struct broken_word *untruth; | |
1083 | char *table_ptr; | |
d5364748 KR |
1084 | addressT table_addr; |
1085 | addressT from_addr, to_addr; | |
6efd877d KR |
1086 | int n, m; |
1087 | ||
6efd877d KR |
1088 | fragP = lie->dispfrag; |
1089 | ||
43ca9aa6 | 1090 | /* Find out how many broken_words go here. */ |
6efd877d KR |
1091 | n = 0; |
1092 | for (untruth = lie; untruth && untruth->dispfrag == fragP; untruth = untruth->next_broken_word) | |
1093 | if (untruth->added == 1) | |
1094 | n++; | |
1095 | ||
1096 | table_ptr = lie->dispfrag->fr_opcode; | |
1097 | table_addr = lie->dispfrag->fr_address + (table_ptr - lie->dispfrag->fr_literal); | |
43ca9aa6 KR |
1098 | /* Create the jump around the long jumps. This is a short |
1099 | jump from table_ptr+0 to table_ptr+n*long_jump_size. */ | |
6efd877d KR |
1100 | from_addr = table_addr; |
1101 | to_addr = table_addr + md_short_jump_size + n * md_long_jump_size; | |
1102 | md_create_short_jump (table_ptr, from_addr, to_addr, lie->dispfrag, lie->add); | |
1103 | table_ptr += md_short_jump_size; | |
1104 | table_addr += md_short_jump_size; | |
1105 | ||
1106 | for (m = 0; lie && lie->dispfrag == fragP; m++, lie = lie->next_broken_word) | |
1107 | { | |
1108 | if (lie->added == 2) | |
1109 | continue; | |
1110 | /* Patch the jump table */ | |
1111 | /* This is the offset from ??? to table_ptr+0 */ | |
d5364748 | 1112 | to_addr = table_addr - S_GET_VALUE (lie->sub); |
6efd877d KR |
1113 | md_number_to_chars (lie->word_goes_here, to_addr, 2); |
1114 | for (untruth = lie->next_broken_word; untruth && untruth->dispfrag == fragP; untruth = untruth->next_broken_word) | |
1115 | { | |
1116 | if (untruth->use_jump == lie) | |
1117 | md_number_to_chars (untruth->word_goes_here, to_addr, 2); | |
1118 | } | |
1119 | ||
1120 | /* Install the long jump */ | |
1121 | /* this is a long jump from table_ptr+0 to the final target */ | |
1122 | from_addr = table_addr; | |
1123 | to_addr = S_GET_VALUE (lie->add) + lie->addnum; | |
1124 | md_create_long_jump (table_ptr, from_addr, to_addr, lie->dispfrag, lie->add); | |
1125 | table_ptr += md_long_jump_size; | |
1126 | table_addr += md_long_jump_size; | |
1127 | } | |
1128 | } | |
1129 | } | |
fecd2382 | 1130 | #endif /* not WORKING_DOT_WORD */ |
6efd877d | 1131 | |
43ca9aa6 | 1132 | #ifndef BFD_ASSEMBLER |
3eb802b5 | 1133 | #ifndef OBJ_VMS |
6efd877d KR |
1134 | { /* not vms */ |
1135 | /* | |
3eb802b5 ILT |
1136 | * Scan every FixS performing fixups. We had to wait until now to do |
1137 | * this because md_convert_frag() may have made some fixSs. | |
1138 | */ | |
6efd877d KR |
1139 | int trsize, drsize; |
1140 | ||
1141 | subseg_change (SEG_TEXT, 0); | |
d5364748 | 1142 | trsize = md_reloc_size * fixup_segment (text_fix_root, SEG_TEXT); |
6efd877d | 1143 | subseg_change (SEG_DATA, 0); |
d5364748 | 1144 | drsize = md_reloc_size * fixup_segment (data_fix_root, SEG_DATA); |
6efd877d KR |
1145 | H_SET_RELOCATION_SIZE (&headers, trsize, drsize); |
1146 | ||
1147 | /* FIXME move this stuff into the pre-write-hook */ | |
1148 | H_SET_MAGIC_NUMBER (&headers, magic_number_for_object_file); | |
1149 | H_SET_ENTRY_POINT (&headers, 0); | |
1150 | ||
1151 | obj_pre_write_hook (&headers); /* extra coff stuff */ | |
6efd877d KR |
1152 | |
1153 | object_file_size = H_GET_FILE_SIZE (&headers); | |
1154 | next_object_file_charP = the_object_file = xmalloc (object_file_size); | |
1155 | ||
1156 | output_file_create (out_file_name); | |
1157 | ||
1158 | obj_header_append (&next_object_file_charP, &headers); | |
1159 | ||
1160 | know ((next_object_file_charP - the_object_file) == H_GET_HEADER_SIZE (&headers)); | |
1161 | ||
1162 | /* | |
43ca9aa6 KR |
1163 | * Emit code. |
1164 | */ | |
6efd877d KR |
1165 | for (fragP = text_frag_root; fragP; fragP = fragP->fr_next) |
1166 | { | |
1167 | register long count; | |
1168 | register char *fill_literal; | |
1169 | register long fill_size; | |
1170 | ||
1171 | know (fragP->fr_type == rs_fill); | |
1172 | append (&next_object_file_charP, fragP->fr_literal, (unsigned long) fragP->fr_fix); | |
1173 | fill_literal = fragP->fr_literal + fragP->fr_fix; | |
1174 | fill_size = fragP->fr_var; | |
1175 | know (fragP->fr_offset >= 0); | |
1176 | ||
1177 | for (count = fragP->fr_offset; count; count--) | |
1178 | { | |
1179 | append (&next_object_file_charP, fill_literal, (unsigned long) fill_size); | |
1180 | } /* for each */ | |
1181 | ||
1182 | } /* for each code frag. */ | |
1183 | ||
1184 | know ((next_object_file_charP - the_object_file) == (H_GET_HEADER_SIZE (&headers) + H_GET_TEXT_SIZE (&headers) + H_GET_DATA_SIZE (&headers))); | |
1185 | ||
1186 | /* | |
43ca9aa6 KR |
1187 | * Emit relocations. |
1188 | */ | |
6efd877d KR |
1189 | obj_emit_relocations (&next_object_file_charP, text_fix_root, (relax_addressT) 0); |
1190 | 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 | 1191 | #ifdef TC_I960 |
6efd877d | 1192 | /* Make addresses in data relocation directives relative to beginning of |
43ca9aa6 KR |
1193 | * first data fragment, not end of last text fragment: alignment of the |
1194 | * start of the data segment may place a gap between the segments. | |
1195 | */ | |
6efd877d | 1196 | obj_emit_relocations (&next_object_file_charP, data_fix_root, data0_frchainP->frch_root->fr_address); |
fecd2382 | 1197 | #else /* TC_I960 */ |
6efd877d | 1198 | obj_emit_relocations (&next_object_file_charP, data_fix_root, text_last_frag->fr_address); |
fecd2382 | 1199 | #endif /* TC_I960 */ |
6efd877d KR |
1200 | |
1201 | 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))); | |
1202 | ||
1203 | /* | |
43ca9aa6 KR |
1204 | * Emit line number entries. |
1205 | */ | |
6efd877d KR |
1206 | OBJ_EMIT_LINENO (&next_object_file_charP, lineno_rootP, the_object_file); |
1207 | 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))); | |
1208 | ||
1209 | /* | |
3eb802b5 ILT |
1210 | * Emit symbols. |
1211 | */ | |
6efd877d KR |
1212 | obj_emit_symbols (&next_object_file_charP, symbol_rootP); |
1213 | 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))); | |
1214 | ||
1215 | /* | |
3eb802b5 ILT |
1216 | * Emit strings. |
1217 | */ | |
6efd877d KR |
1218 | |
1219 | if (string_byte_count > 0) | |
1220 | { | |
1221 | obj_emit_strings (&next_object_file_charP); | |
1222 | } /* only if we have a string table */ | |
1223 | ||
45432836 | 1224 | #ifdef BFD_HEADERS |
6efd877d KR |
1225 | bfd_seek (stdoutput, 0, 0); |
1226 | bfd_write (the_object_file, 1, object_file_size, stdoutput); | |
45432836 | 1227 | #else |
6efd877d KR |
1228 | |
1229 | /* Write the data to the file */ | |
1230 | output_file_append (the_object_file, object_file_size, out_file_name); | |
45432836 | 1231 | #endif |
6efd877d KR |
1232 | |
1233 | output_file_close (out_file_name); | |
1234 | } /* non vms output */ | |
1235 | #else /* VMS */ | |
1236 | /* | |
3eb802b5 ILT |
1237 | * Now do the VMS-dependent part of writing the object file |
1238 | */ | |
85825401 ILT |
1239 | VMS_write_object_file (H_GET_TEXT_SIZE (&headers), |
1240 | H_GET_DATA_SIZE (&headers), | |
1241 | H_GET_BSS_SIZE (&headers), | |
3eb802b5 | 1242 | text_frag_root, data_frag_root); |
6efd877d | 1243 | #endif /* VMS */ |
43ca9aa6 | 1244 | #else /* BFD_ASSEMBLER */ |
6efd877d | 1245 | |
d5364748 KR |
1246 | #ifdef obj_check_file_symbols |
1247 | obj_check_file_symbols (); | |
1248 | #endif | |
1249 | ||
1250 | bfd_map_over_sections (stdoutput, adjust_reloc_syms, (char *)0); | |
1251 | ||
43ca9aa6 KR |
1252 | /* Set up symbol table, and write it out. */ |
1253 | if (symbol_rootP) | |
1254 | { | |
1255 | int i = 0, n; | |
1256 | symbolS *symp; | |
1257 | ||
1258 | for (symp = symbol_rootP; symp; symp = symbol_next (symp)) | |
1259 | { | |
d5364748 KR |
1260 | int keep = 0; |
1261 | ||
5868b1fe ILT |
1262 | if (! symp->sy_resolved) |
1263 | { | |
5ac34ac3 | 1264 | if (symp->sy_value.X_op == O_constant) |
5868b1fe ILT |
1265 | { |
1266 | /* This is the normal case; skip the call. */ | |
1267 | S_SET_VALUE (symp, | |
1268 | (S_GET_VALUE (symp) | |
1269 | + symp->sy_frag->fr_address)); | |
1270 | symp->sy_resolved = 1; | |
1271 | } | |
1272 | else | |
1273 | resolve_symbol_value (symp); | |
1274 | } | |
1275 | ||
43ca9aa6 KR |
1276 | /* So far, common symbols have been treated like undefined symbols. |
1277 | Put them in the common section now. */ | |
1278 | if (S_IS_DEFINED (symp) == 0 | |
1279 | && S_GET_VALUE (symp) != 0) | |
1280 | S_SET_SEGMENT (symp, &bfd_com_section); | |
1281 | #if 0 | |
5868b1fe | 1282 | printf ("symbol `%s'\n\t@%x: value=%d flags=%x seg=%s\n", |
43ca9aa6 KR |
1283 | S_GET_NAME (symp), symp, |
1284 | S_GET_VALUE (symp), | |
d5364748 | 1285 | symp->bsym->flags, |
43ca9aa6 KR |
1286 | segment_name (symp->bsym->section)); |
1287 | #endif | |
1288 | { | |
1289 | int punt = 0; | |
1290 | #ifdef obj_frob_symbol | |
1291 | obj_frob_symbol (symp, punt); | |
1292 | if (punt) | |
1293 | goto punt_it; | |
1294 | #endif | |
1295 | #ifdef tc_frob_symbol | |
1296 | tc_frob_symbol (symp, punt); | |
1297 | if (punt) | |
1298 | goto punt_it; | |
1299 | #endif | |
1300 | } | |
1301 | /* If we don't want to keep this symbol, splice it out of the | |
1302 | chain now. */ | |
1303 | if (S_IS_LOCAL (symp)) | |
1304 | { | |
1305 | symbolS *prev, *next; | |
1306 | punt_it: | |
1307 | prev = symbol_previous (symp); | |
1308 | next = symbol_next (symp); | |
1309 | #ifdef DEBUG | |
d5364748 | 1310 | verify_symbol_chain_2 (symp); |
43ca9aa6 KR |
1311 | #endif |
1312 | if (prev) | |
1313 | { | |
1314 | symbol_next (prev) = next; | |
1315 | symp = prev; | |
1316 | } | |
d5364748 KR |
1317 | else if (symp == symbol_rootP) |
1318 | symbol_rootP = next; | |
43ca9aa6 KR |
1319 | else |
1320 | abort (); | |
1321 | if (next) | |
1322 | symbol_previous (next) = prev; | |
1323 | else | |
1324 | symbol_lastP = prev; | |
1325 | #ifdef DEBUG | |
d5364748 KR |
1326 | if (prev) |
1327 | verify_symbol_chain_2 (prev); | |
1328 | else if (next) | |
1329 | verify_symbol_chain_2 (next); | |
45432836 | 1330 | #endif |
43ca9aa6 KR |
1331 | continue; |
1332 | } | |
85051959 ILT |
1333 | |
1334 | /* Set the value into the BFD symbol. Up til now the value | |
1335 | has only been kept in the gas symbolS struct. */ | |
1336 | symp->bsym->value = S_GET_VALUE (symp); | |
1337 | ||
43ca9aa6 KR |
1338 | i++; |
1339 | } | |
1340 | n = i; | |
1341 | if (n) | |
1342 | { | |
1343 | asymbol **asympp; | |
1344 | boolean result; | |
d5364748 | 1345 | extern PTR bfd_alloc PARAMS ((bfd *, size_t)); |
43ca9aa6 | 1346 | |
d5364748 KR |
1347 | asympp = (asymbol **) bfd_alloc (stdoutput, |
1348 | n * sizeof (asymbol *)); | |
43ca9aa6 KR |
1349 | symp = symbol_rootP; |
1350 | for (i = 0; i < n; i++, symp = symbol_next (symp)) | |
1351 | { | |
1352 | asympp[i] = symp->bsym; | |
1353 | symp->written = 1; | |
1354 | } | |
1355 | result = bfd_set_symtab (stdoutput, asympp, n); | |
1356 | assert (result == true); | |
1357 | } | |
1358 | } | |
1359 | ||
d5364748 | 1360 | |
f2f7d044 | 1361 | #ifdef obj_frob_file |
85051959 ILT |
1362 | /* If obj_frob_file changes the symbol value at this point, it is |
1363 | responsible for moving the changed value into symp->bsym->value | |
1364 | as well. Hopefully all symbol value changing can be done in | |
1365 | {obj,tc}_frob_symbol. */ | |
f2f7d044 ILT |
1366 | obj_frob_file (); |
1367 | #endif | |
1368 | ||
43ca9aa6 KR |
1369 | /* Now that all the sizes are known, and contents correct, we can |
1370 | start writing the file. */ | |
8d6c34a1 KR |
1371 | bfd_map_over_sections (stdoutput, write_relocs, (char *) 0); |
1372 | ||
43ca9aa6 KR |
1373 | bfd_map_over_sections (stdoutput, write_contents, (char *) 0); |
1374 | ||
1375 | output_file_close (out_file_name); | |
1376 | #endif /* BFD_ASSEMBLER */ | |
1377 | } | |
d5364748 | 1378 | #endif /* ! BFD */ |
fecd2382 RP |
1379 | |
1380 | /* | |
1381 | * relax_segment() | |
1382 | * | |
1383 | * Now we have a segment, not a crowd of sub-segments, we can make fr_address | |
1384 | * values. | |
1385 | * | |
1386 | * Relax the frags. | |
1387 | * | |
1388 | * After this, all frags in this segment have addresses that are correct | |
1389 | * within the segment. Since segments live in different file addresses, | |
1390 | * these frag addresses may not be the same as final object-file addresses. | |
1391 | */ | |
45432836 | 1392 | |
d5364748 | 1393 | /* Subroutines of relax_segment. */ |
43ca9aa6 KR |
1394 | static int |
1395 | is_dnrange (f1, f2) | |
1396 | struct frag *f1; | |
1397 | struct frag *f2; | |
1398 | { | |
1399 | for (; f1; f1 = f1->fr_next) | |
1400 | if (f1->fr_next == f2) | |
1401 | return 1; | |
1402 | return 0; | |
1403 | } | |
1404 | ||
1405 | /* Relax_align. Advance location counter to next address that has 'alignment' | |
d5364748 | 1406 | lowest order bits all 0s, return size of adjustment made. */ |
43ca9aa6 KR |
1407 | static relax_addressT |
1408 | relax_align (address, alignment) | |
1409 | register relax_addressT address; /* Address now. */ | |
d5364748 | 1410 | register int alignment; /* Alignment (binary). */ |
43ca9aa6 KR |
1411 | { |
1412 | relax_addressT mask; | |
1413 | relax_addressT new_address; | |
1414 | ||
1415 | mask = ~((~0) << alignment); | |
1416 | new_address = (address + mask) & (~mask); | |
1417 | if (linkrelax) | |
1418 | /* We must provide lots of padding, so the linker can discard it | |
1419 | when needed. The linker will not add extra space, ever. */ | |
1420 | new_address += (1 << alignment); | |
1421 | return (new_address - address); | |
1422 | } | |
45432836 | 1423 | |
6efd877d KR |
1424 | void |
1425 | relax_segment (segment_frag_root, segment) | |
1426 | struct frag *segment_frag_root; | |
43ca9aa6 | 1427 | segT segment; |
fecd2382 | 1428 | { |
6efd877d KR |
1429 | register struct frag *fragP; |
1430 | register relax_addressT address; | |
43ca9aa6 | 1431 | #if !defined (MANY_SEGMENTS) && !defined (BFD_ASSEMBLER) |
6efd877d | 1432 | know (segment == SEG_DATA || segment == SEG_TEXT || segment == SEG_BSS); |
45432836 | 1433 | #endif |
6efd877d KR |
1434 | /* In case md_estimate_size_before_relax() wants to make fixSs. */ |
1435 | subseg_change (segment, 0); | |
1436 | ||
7f2cb270 KR |
1437 | /* For each frag in segment: count and store (a 1st guess of) |
1438 | fr_address. */ | |
6efd877d KR |
1439 | address = 0; |
1440 | for (fragP = segment_frag_root; fragP; fragP = fragP->fr_next) | |
1441 | { | |
1442 | fragP->fr_address = address; | |
1443 | address += fragP->fr_fix; | |
1444 | ||
1445 | switch (fragP->fr_type) | |
1446 | { | |
1447 | case rs_fill: | |
1448 | address += fragP->fr_offset * fragP->fr_var; | |
1449 | break; | |
1450 | ||
1451 | case rs_align: | |
d5364748 | 1452 | address += relax_align (address, (int) fragP->fr_offset); |
6efd877d KR |
1453 | break; |
1454 | ||
1455 | case rs_org: | |
7f2cb270 | 1456 | /* Assume .org is nugatory. It will grow with 1st relax. */ |
6efd877d KR |
1457 | break; |
1458 | ||
1459 | case rs_machine_dependent: | |
1460 | address += md_estimate_size_before_relax (fragP, segment); | |
1461 | break; | |
1462 | ||
fecd2382 | 1463 | #ifndef WORKING_DOT_WORD |
6efd877d KR |
1464 | /* Broken words don't concern us yet */ |
1465 | case rs_broken_word: | |
1466 | break; | |
fecd2382 | 1467 | #endif |
6efd877d KR |
1468 | |
1469 | default: | |
1470 | BAD_CASE (fragP->fr_type); | |
1471 | break; | |
1472 | } /* switch(fr_type) */ | |
1473 | } /* for each frag in the segment */ | |
1474 | ||
7f2cb270 | 1475 | /* Do relax(). */ |
6efd877d | 1476 | { |
7f2cb270 | 1477 | long stretch; /* May be any size, 0 or negative. */ |
6efd877d KR |
1478 | /* Cumulative number of addresses we have */ |
1479 | /* relaxed this pass. */ | |
1480 | /* We may have relaxed more than one address. */ | |
7f2cb270 KR |
1481 | long stretched; /* Have we stretched on this pass? */ |
1482 | /* This is 'cuz stretch may be zero, when, in fact some piece of code | |
1483 | grew, and another shrank. If a branch instruction doesn't fit anymore, | |
1484 | we could be scrod. */ | |
6efd877d KR |
1485 | |
1486 | do | |
1487 | { | |
1488 | stretch = stretched = 0; | |
1489 | for (fragP = segment_frag_root; fragP; fragP = fragP->fr_next) | |
1490 | { | |
7f2cb270 KR |
1491 | long growth = 0; |
1492 | unsigned long was_address; | |
1493 | long offset; | |
1494 | symbolS *symbolP; | |
1495 | long target; | |
1496 | long after; | |
1497 | long aim; | |
6efd877d KR |
1498 | |
1499 | was_address = fragP->fr_address; | |
1500 | address = fragP->fr_address += stretch; | |
1501 | symbolP = fragP->fr_symbol; | |
1502 | offset = fragP->fr_offset; | |
6efd877d KR |
1503 | |
1504 | switch (fragP->fr_type) | |
1505 | { | |
1506 | case rs_fill: /* .fill never relaxes. */ | |
1507 | growth = 0; | |
1508 | break; | |
1509 | ||
fecd2382 | 1510 | #ifndef WORKING_DOT_WORD |
6efd877d | 1511 | /* JF: This is RMS's idea. I do *NOT* want to be blamed |
7f2cb270 KR |
1512 | for it I do not want to write it. I do not want to have |
1513 | anything to do with it. This is not the proper way to | |
1514 | implement this misfeature. */ | |
6efd877d KR |
1515 | case rs_broken_word: |
1516 | { | |
1517 | struct broken_word *lie; | |
1518 | struct broken_word *untruth; | |
6efd877d KR |
1519 | |
1520 | /* Yes this is ugly (storing the broken_word pointer | |
7f2cb270 KR |
1521 | in the symbol slot). Still, this whole chunk of |
1522 | code is ugly, and I don't feel like doing anything | |
1523 | about it. Think of it as stubbornness in action. */ | |
6efd877d KR |
1524 | growth = 0; |
1525 | for (lie = (struct broken_word *) (fragP->fr_symbol); | |
1526 | lie && lie->dispfrag == fragP; | |
1527 | lie = lie->next_broken_word) | |
1528 | { | |
1529 | ||
1530 | if (lie->added) | |
1531 | continue; | |
1532 | ||
7f2cb270 KR |
1533 | offset = (lie->add->sy_frag->fr_address |
1534 | + S_GET_VALUE (lie->add) | |
1535 | + lie->addnum | |
1536 | - (lie->sub->sy_frag->fr_address | |
1537 | + S_GET_VALUE (lie->sub))); | |
6efd877d KR |
1538 | if (offset <= -32768 || offset >= 32767) |
1539 | { | |
1540 | if (flagseen['K']) | |
d5364748 KR |
1541 | { |
1542 | char buf[50]; | |
1543 | sprint_value (buf, lie->addnum); | |
1544 | as_warn (".word %s-%s+%s didn't fit", | |
1545 | S_GET_NAME (lie->add), | |
1546 | S_GET_NAME (lie->sub), | |
1547 | buf); | |
1548 | } | |
6efd877d KR |
1549 | lie->added = 1; |
1550 | if (fragP->fr_subtype == 0) | |
1551 | { | |
1552 | fragP->fr_subtype++; | |
1553 | growth += md_short_jump_size; | |
1554 | } | |
7f2cb270 KR |
1555 | for (untruth = lie->next_broken_word; |
1556 | untruth && untruth->dispfrag == lie->dispfrag; | |
1557 | untruth = untruth->next_broken_word) | |
6efd877d KR |
1558 | if ((untruth->add->sy_frag == lie->add->sy_frag) |
1559 | && S_GET_VALUE (untruth->add) == S_GET_VALUE (lie->add)) | |
1560 | { | |
1561 | untruth->added = 2; | |
1562 | untruth->use_jump = lie; | |
1563 | } | |
1564 | growth += md_long_jump_size; | |
1565 | } | |
1566 | } | |
1567 | ||
1568 | break; | |
1569 | } /* case rs_broken_word */ | |
fecd2382 | 1570 | #endif |
6efd877d | 1571 | case rs_align: |
43ca9aa6 KR |
1572 | growth = (relax_align ((relax_addressT) (address |
1573 | + fragP->fr_fix), | |
d5364748 | 1574 | (int) offset) |
43ca9aa6 KR |
1575 | - relax_align ((relax_addressT) (was_address |
1576 | + fragP->fr_fix), | |
d5364748 | 1577 | (int) offset)); |
6efd877d KR |
1578 | break; |
1579 | ||
1580 | case rs_org: | |
1581 | target = offset; | |
1582 | ||
1583 | if (symbolP) | |
1584 | { | |
43ca9aa6 KR |
1585 | #if !defined (MANY_SEGMENTS) && !defined (BFD_ASSEMBLER) |
1586 | know ((S_GET_SEGMENT (symbolP) == SEG_ABSOLUTE) | |
1587 | || (S_GET_SEGMENT (symbolP) == SEG_DATA) | |
1588 | || (S_GET_SEGMENT (symbolP) == SEG_TEXT) | |
1589 | || S_GET_SEGMENT (symbolP) == SEG_BSS); | |
6efd877d | 1590 | know (symbolP->sy_frag); |
43ca9aa6 KR |
1591 | know (!(S_GET_SEGMENT (symbolP) == SEG_ABSOLUTE) |
1592 | || (symbolP->sy_frag == &zero_address_frag)); | |
45432836 | 1593 | #endif |
6efd877d KR |
1594 | target += S_GET_VALUE (symbolP) |
1595 | + symbolP->sy_frag->fr_address; | |
1596 | } /* if we have a symbol */ | |
1597 | ||
1598 | know (fragP->fr_next); | |
1599 | after = fragP->fr_next->fr_address; | |
1600 | growth = ((target - after) > 0) ? (target - after) : 0; | |
43ca9aa6 KR |
1601 | /* Growth may be negative, but variable part of frag |
1602 | cannot have fewer than 0 chars. That is, we can't | |
1603 | .org backwards. */ | |
6efd877d KR |
1604 | |
1605 | growth -= stretch; /* This is an absolute growth factor */ | |
1606 | break; | |
1607 | ||
1608 | case rs_machine_dependent: | |
1609 | { | |
7f2cb270 KR |
1610 | const relax_typeS *this_type; |
1611 | const relax_typeS *start_type; | |
1612 | relax_substateT next_state; | |
1613 | relax_substateT this_state; | |
6efd877d | 1614 | |
7f2cb270 KR |
1615 | this_state = fragP->fr_subtype; |
1616 | start_type = this_type = md_relax_table + this_state; | |
6efd877d KR |
1617 | target = offset; |
1618 | ||
1619 | if (symbolP) | |
1620 | { | |
43ca9aa6 KR |
1621 | #if !defined (MANY_SEGMENTS) && !defined (BFD_ASSEMBLER) |
1622 | know ((S_GET_SEGMENT (symbolP) == SEG_ABSOLUTE) | |
1623 | || (S_GET_SEGMENT (symbolP) == SEG_DATA) | |
1624 | || (S_GET_SEGMENT (symbolP) == SEG_BSS) | |
1625 | || (S_GET_SEGMENT (symbolP) == SEG_TEXT)); | |
45432836 | 1626 | #endif |
6efd877d | 1627 | know (symbolP->sy_frag); |
43ca9aa6 KR |
1628 | know (!(S_GET_SEGMENT (symbolP) == absolute_section) |
1629 | || symbolP->sy_frag == &zero_address_frag); | |
6efd877d KR |
1630 | target += |
1631 | S_GET_VALUE (symbolP) | |
1632 | + symbolP->sy_frag->fr_address; | |
1633 | ||
1634 | /* If frag has yet to be reached on this pass, | |
7f2cb270 KR |
1635 | assume it will move by STRETCH just as we did. |
1636 | If this is not so, it will be because some frag | |
d5364748 KR |
1637 | between grows, and that will force another pass. |
1638 | ||
1639 | Beware zero-length frags. | |
1640 | ||
1641 | There should be a faster way to do this. */ | |
6efd877d KR |
1642 | |
1643 | if (symbolP->sy_frag->fr_address >= was_address | |
1644 | && is_dnrange (fragP, symbolP->sy_frag)) | |
1645 | { | |
1646 | target += stretch; | |
7f2cb270 | 1647 | } |
d5364748 | 1648 | } |
6efd877d KR |
1649 | |
1650 | aim = target - address - fragP->fr_fix; | |
1651 | /* The displacement is affected by the instruction size | |
7f2cb270 KR |
1652 | for the 32k architecture. I think we ought to be able |
1653 | to add fragP->fr_pcrel_adjust in all cases (it should be | |
1654 | zero if not used), but just in case it breaks something | |
1655 | else we'll put this inside #ifdef NS32K ... #endif */ | |
d5364748 KR |
1656 | #ifndef TC_NS32K |
1657 | if (fragP->fr_pcrel_adjust) | |
1658 | abort (); | |
1659 | #endif | |
6efd877d | 1660 | aim += fragP->fr_pcrel_adjust; |
6efd877d KR |
1661 | |
1662 | if (aim < 0) | |
1663 | { | |
1664 | /* Look backwards. */ | |
1665 | for (next_state = this_type->rlx_more; next_state;) | |
7f2cb270 KR |
1666 | if (aim >= this_type->rlx_backward) |
1667 | next_state = 0; | |
1668 | else | |
1669 | { | |
1670 | /* Grow to next state. */ | |
1671 | this_state = next_state; | |
1672 | this_type = md_relax_table + this_state; | |
1673 | next_state = this_type->rlx_more; | |
1674 | } | |
6efd877d KR |
1675 | } |
1676 | else | |
1677 | { | |
a39116f1 | 1678 | #ifdef M68K_AIM_KLUDGE |
6efd877d | 1679 | M68K_AIM_KLUDGE (aim, this_state, this_type); |
fecd2382 | 1680 | #endif |
6efd877d KR |
1681 | /* Look forwards. */ |
1682 | for (next_state = this_type->rlx_more; next_state;) | |
7f2cb270 KR |
1683 | if (aim <= this_type->rlx_forward) |
1684 | next_state = 0; | |
1685 | else | |
1686 | { | |
1687 | /* Grow to next state. */ | |
1688 | this_state = next_state; | |
1689 | this_type = md_relax_table + this_state; | |
1690 | next_state = this_type->rlx_more; | |
1691 | } | |
6efd877d KR |
1692 | } |
1693 | ||
7f2cb270 KR |
1694 | growth = this_type->rlx_length - start_type->rlx_length; |
1695 | if (growth != 0) | |
6efd877d | 1696 | fragP->fr_subtype = this_state; |
7f2cb270 KR |
1697 | } |
1698 | break; | |
6efd877d KR |
1699 | |
1700 | default: | |
1701 | BAD_CASE (fragP->fr_type); | |
1702 | break; | |
1703 | } | |
1704 | if (growth) | |
1705 | { | |
1706 | stretch += growth; | |
1707 | stretched++; | |
1708 | } | |
1709 | } /* For each frag in the segment. */ | |
1710 | } | |
1711 | while (stretched); /* Until nothing further to relax. */ | |
1712 | } /* do_relax */ | |
1713 | ||
1714 | /* | |
7f2cb270 KR |
1715 | * We now have valid fr_address'es for each frag. |
1716 | */ | |
6efd877d KR |
1717 | |
1718 | /* | |
7f2cb270 KR |
1719 | * All fr_address's are correct, relative to their own segment. |
1720 | * We have made all the fixS we will ever make. | |
1721 | */ | |
6efd877d | 1722 | } /* relax_segment() */ |
fecd2382 | 1723 | |
fecd2382 | 1724 | /* fixup_segment() |
6efd877d | 1725 | |
fecd2382 RP |
1726 | Go through all the fixS's in a segment and see which ones can be |
1727 | handled now. (These consist of fixS where we have since discovered | |
1728 | the value of a symbol, or the address of the frag involved.) | |
1729 | For each one, call md_apply_fix to put the fix into the frag data. | |
6efd877d | 1730 | |
fecd2382 RP |
1731 | Result is a count of how many relocation structs will be needed to |
1732 | handle the remaining fixS's that we couldn't completely handle here. | |
1733 | These will be output later by emit_relocations(). */ | |
1734 | ||
09952cd9 | 1735 | static long |
6efd877d | 1736 | fixup_segment (fixP, this_segment_type) |
09952cd9 | 1737 | register fixS *fixP; |
6efd877d | 1738 | segT this_segment_type; /* N_TYPE bits for segment. */ |
fecd2382 | 1739 | { |
6efd877d KR |
1740 | register long seg_reloc_count; |
1741 | register symbolS *add_symbolP; | |
1742 | register symbolS *sub_symbolP; | |
d5364748 | 1743 | valueT add_number; |
6efd877d KR |
1744 | register int size; |
1745 | register char *place; | |
1746 | register long where; | |
1747 | register char pcrel; | |
1748 | register fragS *fragP; | |
43ca9aa6 | 1749 | register segT add_symbol_segment = absolute_section; |
6efd877d | 1750 | |
6efd877d | 1751 | seg_reloc_count = 0; |
6efd877d KR |
1752 | /* If the linker is doing the relaxing, we must not do any fixups */ |
1753 | if (linkrelax) | |
43ca9aa6 KR |
1754 | for (; fixP; fixP = fixP->fx_next) |
1755 | seg_reloc_count++; | |
6efd877d | 1756 | else |
6efd877d KR |
1757 | for (; fixP; fixP = fixP->fx_next) |
1758 | { | |
1759 | fragP = fixP->fx_frag; | |
1760 | know (fragP); | |
1761 | where = fixP->fx_where; | |
1762 | place = fragP->fr_literal + where; | |
1763 | size = fixP->fx_size; | |
1764 | add_symbolP = fixP->fx_addsy; | |
fecd2382 | 1765 | #ifdef TC_I960 |
6efd877d KR |
1766 | if (fixP->fx_callj && TC_S_IS_CALLNAME (add_symbolP)) |
1767 | { | |
43ca9aa6 KR |
1768 | /* Relocation should be done via the associated 'bal' |
1769 | entry point symbol. */ | |
6efd877d KR |
1770 | |
1771 | if (!TC_S_IS_BALNAME (tc_get_bal_of_call (add_symbolP))) | |
1772 | { | |
1773 | as_bad ("No 'bal' entry point for leafproc %s", | |
1774 | S_GET_NAME (add_symbolP)); | |
1775 | continue; | |
1776 | } | |
1777 | fixP->fx_addsy = add_symbolP = tc_get_bal_of_call (add_symbolP); | |
43ca9aa6 | 1778 | } |
fecd2382 | 1779 | #endif |
6efd877d KR |
1780 | sub_symbolP = fixP->fx_subsy; |
1781 | add_number = fixP->fx_offset; | |
1782 | pcrel = fixP->fx_pcrel; | |
1783 | ||
1784 | if (add_symbolP) | |
43ca9aa6 | 1785 | add_symbol_segment = S_GET_SEGMENT (add_symbolP); |
6efd877d KR |
1786 | |
1787 | if (sub_symbolP) | |
1788 | { | |
1789 | if (!add_symbolP) | |
1790 | { | |
1791 | /* Its just -sym */ | |
43ca9aa6 KR |
1792 | if (S_GET_SEGMENT (sub_symbolP) != absolute_section) |
1793 | as_bad ("Negative of non-absolute symbol %s", | |
1794 | S_GET_NAME (sub_symbolP)); | |
6efd877d KR |
1795 | |
1796 | add_number -= S_GET_VALUE (sub_symbolP); | |
6efd877d KR |
1797 | } |
1798 | else if ((S_GET_SEGMENT (sub_symbolP) == add_symbol_segment) | |
1799 | && (SEG_NORMAL (add_symbol_segment) | |
43ca9aa6 | 1800 | || (add_symbol_segment == absolute_section))) |
6efd877d | 1801 | { |
43ca9aa6 KR |
1802 | /* Difference of 2 symbols from same segment. |
1803 | Can't make difference of 2 undefineds: 'value' means | |
1804 | something different for N_UNDF. */ | |
fecd2382 | 1805 | #ifdef TC_I960 |
6efd877d | 1806 | /* Makes no sense to use the difference of 2 arbitrary symbols |
43ca9aa6 | 1807 | as the target of a call instruction. */ |
6efd877d KR |
1808 | if (fixP->fx_callj) |
1809 | { | |
1810 | as_bad ("callj to difference of 2 symbols"); | |
1811 | } | |
1812 | #endif /* TC_I960 */ | |
1813 | add_number += S_GET_VALUE (add_symbolP) - | |
1814 | S_GET_VALUE (sub_symbolP); | |
1815 | ||
1816 | add_symbolP = NULL; | |
1817 | fixP->fx_addsy = NULL; | |
1818 | } | |
1819 | else | |
1820 | { | |
1821 | /* Different segments in subtraction. */ | |
43ca9aa6 KR |
1822 | know (!(S_IS_EXTERNAL (sub_symbolP) |
1823 | && (S_GET_SEGMENT (sub_symbolP) == absolute_section))); | |
6efd877d | 1824 | |
43ca9aa6 | 1825 | if ((S_GET_SEGMENT (sub_symbolP) == absolute_section)) |
6efd877d KR |
1826 | { |
1827 | add_number -= S_GET_VALUE (sub_symbolP); | |
1828 | } | |
1829 | else | |
1830 | { | |
d5364748 KR |
1831 | char buf[50]; |
1832 | sprint_value (buf, fragP->fr_address + where); | |
1833 | as_bad ("Can't emit reloc {- %s-seg symbol \"%s\"} @ file address %s.", | |
6efd877d | 1834 | segment_name (S_GET_SEGMENT (sub_symbolP)), |
d5364748 KR |
1835 | S_GET_NAME (sub_symbolP), buf); |
1836 | } | |
6efd877d | 1837 | } |
d5364748 | 1838 | } |
6efd877d KR |
1839 | |
1840 | if (add_symbolP) | |
1841 | { | |
1842 | if (add_symbol_segment == this_segment_type && pcrel) | |
1843 | { | |
1844 | /* | |
43ca9aa6 KR |
1845 | * This fixup was made when the symbol's segment was |
1846 | * SEG_UNKNOWN, but it is now in the local segment. | |
1847 | * So we know how to do the address without relocation. | |
1848 | */ | |
fecd2382 | 1849 | #ifdef TC_I960 |
43ca9aa6 KR |
1850 | /* reloc_callj() may replace a 'call' with a 'calls' or a |
1851 | 'bal', in which cases it modifies *fixP as appropriate. | |
1852 | In the case of a 'calls', no further work is required, | |
1853 | and *fixP has been set up to make the rest of the code | |
1854 | below a no-op. */ | |
6efd877d | 1855 | reloc_callj (fixP); |
fecd2382 | 1856 | #endif /* TC_I960 */ |
6efd877d KR |
1857 | |
1858 | add_number += S_GET_VALUE (add_symbolP); | |
1859 | add_number -= md_pcrel_from (fixP); | |
1860 | pcrel = 0; /* Lie. Don't want further pcrel processing. */ | |
1861 | fixP->fx_addsy = NULL; /* No relocations please. */ | |
1862 | } | |
1863 | else | |
1864 | { | |
43ca9aa6 | 1865 | if (add_symbol_segment == absolute_section) |
6efd877d | 1866 | { |
fecd2382 | 1867 | #ifdef TC_I960 |
43ca9aa6 KR |
1868 | /* See comment about reloc_callj() above. */ |
1869 | reloc_callj (fixP); | |
fecd2382 | 1870 | #endif /* TC_I960 */ |
6efd877d KR |
1871 | add_number += S_GET_VALUE (add_symbolP); |
1872 | fixP->fx_addsy = NULL; | |
1873 | add_symbolP = NULL; | |
43ca9aa6 KR |
1874 | } |
1875 | else if (add_symbol_segment == undefined_section | |
1876 | #ifdef BFD_ASSEMBLER | |
1877 | || add_symbol_segment == &bfd_com_section | |
1878 | #endif | |
1879 | ) | |
1880 | { | |
fecd2382 | 1881 | #ifdef TC_I960 |
6efd877d KR |
1882 | if ((int) fixP->fx_bit_fixP == 13) |
1883 | { | |
1884 | /* This is a COBR instruction. They have only a | |
43ca9aa6 KR |
1885 | * 13-bit displacement and are only to be used |
1886 | * for local branches: flag as error, don't generate | |
1887 | * relocation. | |
1888 | */ | |
6efd877d KR |
1889 | as_bad ("can't use COBR format with external label"); |
1890 | fixP->fx_addsy = NULL; /* No relocations please. */ | |
1891 | continue; | |
1892 | } /* COBR */ | |
fecd2382 | 1893 | #endif /* TC_I960 */ |
6d5460ab | 1894 | |
fecd2382 | 1895 | #ifdef OBJ_COFF |
c593cf41 | 1896 | #ifdef TE_I386AIX |
6efd877d KR |
1897 | if (S_IS_COMMON (add_symbolP)) |
1898 | add_number += S_GET_VALUE (add_symbolP); | |
c593cf41 | 1899 | #endif /* TE_I386AIX */ |
fecd2382 | 1900 | #endif /* OBJ_COFF */ |
6efd877d | 1901 | ++seg_reloc_count; |
43ca9aa6 KR |
1902 | } |
1903 | else | |
1904 | { | |
1905 | seg_reloc_count++; | |
1906 | add_number += S_GET_VALUE (add_symbolP); | |
1907 | } | |
6efd877d KR |
1908 | } /* if not in local seg */ |
1909 | } /* if there was a + symbol */ | |
1910 | ||
1911 | if (pcrel) | |
1912 | { | |
1913 | add_number -= md_pcrel_from (fixP); | |
1914 | if (add_symbolP == 0) | |
1915 | { | |
1916 | fixP->fx_addsy = &abs_symbol; | |
1917 | ++seg_reloc_count; | |
1918 | } /* if there's an add_symbol */ | |
1919 | } /* if pcrel */ | |
1920 | ||
1921 | if (!fixP->fx_bit_fixP) | |
1922 | { | |
d5364748 KR |
1923 | if ((size == 1 |
1924 | && (add_number & ~0xFF) | |
43ca9aa6 KR |
1925 | && ((add_number & ~0xFF) != (-1 & ~0xFF))) |
1926 | || (size == 2 | |
1927 | && (add_number & ~0xFFFF) | |
d5364748 KR |
1928 | && ((add_number & ~0xFFFF) != (-1 & ~0xFFFF))) |
1929 | || (size == 4 | |
1930 | && (add_number & ~(valueT)0xFFFFFFFF) | |
1931 | && ((add_number & ~(valueT)0xFFFFFFFF) != (-1 & ~(valueT)0xFFFFFFFF))) | |
1932 | ) | |
6efd877d | 1933 | { |
d5364748 KR |
1934 | char buf[50]; |
1935 | sprint_value (buf, fragP->fr_address + where); | |
1936 | as_bad ("Value of %d too large for field of %d bytes at %s", | |
1937 | add_number, size, buf); | |
6efd877d KR |
1938 | } /* generic error checking */ |
1939 | #ifdef WARN_SIGNED_OVERFLOW_WORD | |
43ca9aa6 KR |
1940 | /* Warn if a .word value is too large when treated as a signed |
1941 | number. We already know it is not too negative. This is to | |
1942 | catch over-large switches generated by gcc on the 68k. */ | |
6efd877d KR |
1943 | if (!flagseen['J'] |
1944 | && size == 2 | |
1945 | && add_number > 0x7fff) | |
1946 | as_bad ("Signed .word overflow; switch may be too large; %d at 0x%x", | |
1947 | add_number, fragP->fr_address + where); | |
1948 | #endif | |
1949 | } /* not a bit fix */ | |
1950 | ||
43ca9aa6 KR |
1951 | #ifdef BFD_ASSEMBLER |
1952 | md_apply_fix (fixP, &add_number); | |
1953 | #else | |
6efd877d | 1954 | md_apply_fix (fixP, add_number); |
43ca9aa6 | 1955 | #endif |
6efd877d KR |
1956 | } /* For each fixS in this segment. */ |
1957 | ||
fecd2382 RP |
1958 | #ifdef OBJ_COFF |
1959 | #ifdef TC_I960 | |
6efd877d KR |
1960 | { |
1961 | fixS *topP = fixP; | |
1962 | ||
1963 | /* two relocs per callj under coff. */ | |
1964 | for (fixP = topP; fixP; fixP = fixP->fx_next) | |
1965 | { | |
1966 | if (fixP->fx_callj && fixP->fx_addsy != 0) | |
1967 | { | |
1968 | ++seg_reloc_count; | |
1969 | } /* if callj and not already fixed. */ | |
1970 | } /* for each fix */ | |
1971 | } | |
fecd2382 | 1972 | #endif /* TC_I960 */ |
6efd877d | 1973 | |
fecd2382 | 1974 | #endif /* OBJ_COFF */ |
6efd877d | 1975 | return (seg_reloc_count); |
d5364748 | 1976 | } |
fecd2382 | 1977 | |
fecd2382 | 1978 | /* end of write.c */ |