Commit | Line | Data |
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fecd2382 | 1 | /* write.c - emit .o file |
98c6bbbe | 2 | Copyright (C) 1986, 87, 90, 91, 92, 93, 1994 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 | ||
f5c32424 KR |
33 | #ifndef TC_ADJUST_RELOC_COUNT |
34 | #define TC_ADJUST_RELOC_COUNT(FIXP,COUNT) | |
35 | #endif | |
36 | ||
335d35c8 JL |
37 | #ifndef TC_FORCE_RELOCATION |
38 | #define TC_FORCE_RELOCATION(FIXP) 0 | |
39 | #endif | |
40 | ||
43ca9aa6 KR |
41 | #ifndef WORKING_DOT_WORD |
42 | extern CONST int md_short_jump_size; | |
43 | extern CONST int md_long_jump_size; | |
44 | #endif | |
45 | ||
46 | #ifndef BFD_ASSEMBLER | |
47 | ||
45432836 | 48 | #ifndef MANY_SEGMENTS |
09952cd9 KR |
49 | struct frag *text_frag_root; |
50 | struct frag *data_frag_root; | |
51 | struct frag *bss_frag_root; | |
fecd2382 | 52 | |
09952cd9 KR |
53 | struct frag *text_last_frag; /* Last frag in segment. */ |
54 | struct frag *data_last_frag; /* Last frag in segment. */ | |
65bfcf2e | 55 | static struct frag *bss_last_frag; /* Last frag in segment. */ |
45432836 | 56 | #endif |
fecd2382 | 57 | |
80aab579 | 58 | #if ! defined (BFD_ASSEMBLER) && ! defined (BFD) |
fecd2382 | 59 | static object_headers headers; |
fecd2382 | 60 | static char *the_object_file; |
80aab579 ILT |
61 | #endif |
62 | ||
63 | long string_byte_count; | |
fecd2382 RP |
64 | char *next_object_file_charP; /* Tracks object file bytes. */ |
65 | ||
3eb802b5 | 66 | #ifndef OBJ_VMS |
fecd2382 | 67 | int magic_number_for_object_file = DEFAULT_MAGIC_NUMBER_FOR_OBJECT_FILE; |
3eb802b5 | 68 | #endif |
fecd2382 | 69 | |
43ca9aa6 KR |
70 | #endif /* BFD_ASSEMBLER */ |
71 | ||
7a0405b9 | 72 | #ifdef BFD_ASSEMBLER |
b23f6743 | 73 | static fixS *fix_new_internal PARAMS ((fragS *, int where, int size, |
5ac34ac3 ILT |
74 | symbolS *add, symbolS *sub, |
75 | offsetT offset, int pcrel, | |
7a0405b9 | 76 | bfd_reloc_code_real_type r_type)); |
5ac34ac3 | 77 | #else |
b23f6743 | 78 | static fixS *fix_new_internal PARAMS ((fragS *, int where, int size, |
7a0405b9 ILT |
79 | symbolS *add, symbolS *sub, |
80 | offsetT offset, int pcrel, | |
81 | int r_type)); | |
5ac34ac3 | 82 | #endif |
80aab579 | 83 | #if defined (BFD_ASSEMBLER) || !defined (BFD) |
6efd877d | 84 | static long fixup_segment PARAMS ((fixS * fixP, segT this_segment_type)); |
80aab579 | 85 | #endif |
d5364748 | 86 | static relax_addressT relax_align PARAMS ((relax_addressT addr, int align)); |
fecd2382 RP |
87 | |
88 | /* | |
89 | * fix_new() | |
90 | * | |
91 | * Create a fixS in obstack 'notes'. | |
92 | */ | |
5ac34ac3 ILT |
93 | static fixS * |
94 | fix_new_internal (frag, where, size, add_symbol, sub_symbol, offset, pcrel, | |
95 | r_type) | |
6efd877d KR |
96 | fragS *frag; /* Which frag? */ |
97 | int where; /* Where in that frag? */ | |
b23f6743 | 98 | int size; /* 1, 2, or 4 usually. */ |
6efd877d | 99 | symbolS *add_symbol; /* X_add_symbol. */ |
5ac34ac3 | 100 | symbolS *sub_symbol; /* X_op_symbol. */ |
d5364748 | 101 | offsetT offset; /* X_add_number. */ |
6efd877d | 102 | int pcrel; /* TRUE if PC-relative relocation. */ |
43ca9aa6 KR |
103 | #ifdef BFD_ASSEMBLER |
104 | bfd_reloc_code_real_type r_type; /* Relocation type */ | |
105 | #else | |
6efd877d | 106 | int r_type; /* Relocation type */ |
43ca9aa6 | 107 | #endif |
fecd2382 | 108 | { |
6efd877d KR |
109 | fixS *fixP; |
110 | ||
111 | fixP = (fixS *) obstack_alloc (¬es, sizeof (fixS)); | |
112 | ||
113 | fixP->fx_frag = frag; | |
114 | fixP->fx_where = where; | |
115 | fixP->fx_size = size; | |
116 | fixP->fx_addsy = add_symbol; | |
117 | fixP->fx_subsy = sub_symbol; | |
118 | fixP->fx_offset = offset; | |
119 | fixP->fx_pcrel = pcrel; | |
43ca9aa6 | 120 | #if defined(NEED_FX_R_TYPE) || defined (BFD_ASSEMBLER) |
6efd877d | 121 | fixP->fx_r_type = r_type; |
c593cf41 | 122 | #endif |
6efd877d KR |
123 | fixP->fx_im_disp = 0; |
124 | fixP->fx_pcrel_adjust = 0; | |
6efd877d | 125 | fixP->fx_bit_fixP = 0; |
43ca9aa6 | 126 | fixP->fx_addnumber = 0; |
20b39b6f | 127 | fixP->tc_fix_data = NULL; |
a58374d7 | 128 | fixP->fx_tcbit = 0; |
98c6bbbe | 129 | fixP->fx_done = 0; |
43ca9aa6 KR |
130 | |
131 | #ifdef TC_something | |
132 | fixP->fx_bsr = 0; | |
133 | #endif | |
43ca9aa6 | 134 | |
84fa9814 KR |
135 | as_where (&fixP->fx_file, &fixP->fx_line); |
136 | ||
43ca9aa6 KR |
137 | /* Usually, we want relocs sorted numerically, but while |
138 | comparing to older versions of gas that have relocs | |
139 | reverse sorted, it is convenient to have this compile | |
140 | time option. xoxorich. */ | |
141 | ||
142 | { | |
6efd877d | 143 | |
43ca9aa6 KR |
144 | #ifdef BFD_ASSEMBLER |
145 | fixS **seg_fix_rootP = & (seg_info (now_seg)->fix_root); | |
146 | fixS **seg_fix_tailP = & (seg_info (now_seg)->fix_tail); | |
147 | #endif | |
09952cd9 | 148 | |
f6e504fe | 149 | #ifdef REVERSE_SORT_RELOCS |
6efd877d | 150 | |
43ca9aa6 KR |
151 | fixP->fx_next = *seg_fix_rootP; |
152 | *seg_fix_rootP = fixP; | |
6efd877d | 153 | |
f6e504fe | 154 | #else /* REVERSE_SORT_RELOCS */ |
6efd877d | 155 | |
43ca9aa6 | 156 | fixP->fx_next = NULL; |
6efd877d | 157 | |
43ca9aa6 KR |
158 | if (*seg_fix_tailP) |
159 | (*seg_fix_tailP)->fx_next = fixP; | |
160 | else | |
161 | *seg_fix_rootP = fixP; | |
162 | *seg_fix_tailP = fixP; | |
6efd877d | 163 | |
f6e504fe | 164 | #endif /* REVERSE_SORT_RELOCS */ |
6efd877d | 165 | |
43ca9aa6 KR |
166 | } |
167 | ||
168 | return fixP; | |
169 | } | |
170 | ||
5ac34ac3 ILT |
171 | /* Create a fixup relative to a symbol (plus a constant). */ |
172 | ||
173 | fixS * | |
174 | fix_new (frag, where, size, add_symbol, offset, pcrel, r_type) | |
175 | fragS *frag; /* Which frag? */ | |
176 | int where; /* Where in that frag? */ | |
177 | short int size; /* 1, 2, or 4 usually. */ | |
178 | symbolS *add_symbol; /* X_add_symbol. */ | |
179 | offsetT offset; /* X_add_number. */ | |
180 | int pcrel; /* TRUE if PC-relative relocation. */ | |
181 | #ifdef BFD_ASSEMBLER | |
182 | bfd_reloc_code_real_type r_type; /* Relocation type */ | |
183 | #else | |
184 | int r_type; /* Relocation type */ | |
185 | #endif | |
186 | { | |
187 | return fix_new_internal (frag, where, size, add_symbol, | |
188 | (symbolS *) NULL, offset, pcrel, r_type); | |
189 | } | |
190 | ||
191 | /* Create a fixup for an expression. Currently we only support fixups | |
192 | for difference expressions. That is itself more than most object | |
193 | file formats support anyhow. */ | |
194 | ||
195 | fixS * | |
196 | fix_new_exp (frag, where, size, exp, pcrel, r_type) | |
197 | fragS *frag; /* Which frag? */ | |
198 | int where; /* Where in that frag? */ | |
199 | short int size; /* 1, 2, or 4 usually. */ | |
200 | expressionS *exp; /* Expression. */ | |
201 | int pcrel; /* TRUE if PC-relative relocation. */ | |
202 | #ifdef BFD_ASSEMBLER | |
203 | bfd_reloc_code_real_type r_type; /* Relocation type */ | |
204 | #else | |
205 | int r_type; /* Relocation type */ | |
206 | #endif | |
207 | { | |
208 | symbolS *add = NULL; | |
209 | symbolS *sub = NULL; | |
210 | offsetT off = 0; | |
211 | ||
212 | switch (exp->X_op) | |
213 | { | |
214 | case O_absent: | |
215 | break; | |
216 | ||
b23f6743 KR |
217 | case O_uminus: |
218 | sub = exp->X_add_symbol; | |
219 | off = exp->X_add_number; | |
220 | break; | |
221 | ||
5ac34ac3 ILT |
222 | case O_subtract: |
223 | sub = exp->X_op_symbol; | |
224 | /* Fall through. */ | |
225 | case O_symbol: | |
226 | add = exp->X_add_symbol; | |
227 | /* Fall through. */ | |
228 | case O_constant: | |
229 | off = exp->X_add_number; | |
230 | break; | |
231 | ||
232 | default: | |
233 | as_bad ("expression too complex for fixup"); | |
234 | } | |
235 | ||
236 | return fix_new_internal (frag, where, size, add, sub, off, | |
237 | pcrel, r_type); | |
238 | } | |
239 | ||
43ca9aa6 KR |
240 | /* Append a string onto another string, bumping the pointer along. */ |
241 | void | |
242 | append (charPP, fromP, length) | |
243 | char **charPP; | |
244 | char *fromP; | |
245 | unsigned long length; | |
246 | { | |
247 | /* Don't trust memcpy() of 0 chars. */ | |
248 | if (length == 0) | |
249 | return; | |
250 | ||
80aab579 | 251 | memcpy (*charPP, fromP, length); |
43ca9aa6 KR |
252 | *charPP += length; |
253 | } | |
254 | ||
255 | #ifndef BFD_ASSEMBLER | |
256 | int section_alignment[SEG_MAXIMUM_ORDINAL]; | |
257 | #endif | |
258 | ||
259 | /* | |
260 | * This routine records the largest alignment seen for each segment. | |
261 | * If the beginning of the segment is aligned on the worst-case | |
262 | * boundary, all of the other alignments within it will work. At | |
263 | * least one object format really uses this info. | |
264 | */ | |
265 | void | |
266 | record_alignment (seg, align) | |
267 | /* Segment to which alignment pertains */ | |
268 | segT seg; | |
269 | /* Alignment, as a power of 2 (e.g., 1 => 2-byte boundary, 2 => 4-byte | |
270 | boundary, etc.) */ | |
271 | int align; | |
272 | { | |
273 | #ifdef BFD_ASSEMBLER | |
274 | if (align > bfd_get_section_alignment (stdoutput, seg)) | |
275 | bfd_set_section_alignment (stdoutput, seg, align); | |
276 | #else | |
277 | if (align > section_alignment[(int) seg]) | |
278 | section_alignment[(int) seg] = align; | |
279 | #endif | |
280 | } | |
281 | ||
282 | #if defined (BFD_ASSEMBLER) || ! defined (BFD) | |
283 | ||
284 | static fragS * | |
285 | chain_frchains_together_1 (section, frchp) | |
286 | segT section; | |
287 | struct frchain *frchp; | |
288 | { | |
289 | fragS dummy, *prev_frag = &dummy; | |
290 | for (; frchp && frchp->frch_seg == section; frchp = frchp->frch_next) | |
291 | { | |
292 | prev_frag->fr_next = frchp->frch_root; | |
293 | prev_frag = frchp->frch_last; | |
294 | } | |
295 | prev_frag->fr_next = 0; | |
296 | return prev_frag; | |
297 | } | |
298 | ||
299 | #endif | |
300 | ||
301 | #ifdef BFD_ASSEMBLER | |
302 | ||
303 | static void | |
304 | chain_frchains_together (abfd, section, xxx) | |
305 | bfd *abfd; /* unused */ | |
306 | segT section; | |
a58374d7 | 307 | PTR xxx; /* unused */ |
43ca9aa6 | 308 | { |
f2f7d044 ILT |
309 | segment_info_type *info; |
310 | ||
311 | /* BFD may have introduced its own sections without using | |
312 | subseg_new, so it is possible that seg_info is NULL. */ | |
313 | info = seg_info (section); | |
314 | if (info != (segment_info_type *) NULL) | |
0f894895 JL |
315 | info->frchainP->frch_last |
316 | = chain_frchains_together_1 (section, info->frchainP); | |
43ca9aa6 KR |
317 | } |
318 | ||
319 | #endif | |
542e1629 | 320 | |
d5364748 | 321 | #if !defined (BFD) && !defined (BFD_ASSEMBLER) |
65bfcf2e | 322 | |
6efd877d KR |
323 | void |
324 | remove_subsegs (head, seg, root, last) | |
325 | frchainS *head; | |
326 | int seg; | |
327 | fragS **root; | |
328 | fragS **last; | |
65bfcf2e | 329 | { |
65bfcf2e | 330 | *root = head->frch_root; |
43ca9aa6 KR |
331 | *last = chain_frchains_together_1 (seg, head); |
332 | } | |
333 | ||
334 | #endif /* BFD */ | |
335 | ||
80aab579 ILT |
336 | #if defined (BFD_ASSEMBLER) || !defined (BFD) |
337 | ||
43ca9aa6 | 338 | #ifdef BFD_ASSEMBLER |
58d4951d ILT |
339 | static void |
340 | cvt_frag_to_fill (sec, fragP) | |
341 | segT sec; | |
43ca9aa6 | 342 | fragS *fragP; |
43ca9aa6 | 343 | #else |
58d4951d ILT |
344 | static void |
345 | cvt_frag_to_fill (headers, fragP) | |
346 | object_headers *headers; | |
347 | fragS *fragP; | |
43ca9aa6 | 348 | #endif |
58d4951d | 349 | { |
43ca9aa6 | 350 | switch (fragP->fr_type) |
6efd877d | 351 | { |
43ca9aa6 KR |
352 | case rs_align: |
353 | case rs_org: | |
354 | #ifdef HANDLE_ALIGN | |
355 | HANDLE_ALIGN (fragP); | |
356 | #endif | |
357 | fragP->fr_type = rs_fill; | |
43ca9aa6 | 358 | know (fragP->fr_next != NULL); |
43ca9aa6 KR |
359 | fragP->fr_offset = (fragP->fr_next->fr_address |
360 | - fragP->fr_address | |
98c6bbbe | 361 | - fragP->fr_fix) / fragP->fr_var; |
43ca9aa6 | 362 | break; |
65bfcf2e | 363 | |
43ca9aa6 KR |
364 | case rs_fill: |
365 | break; | |
366 | ||
367 | case rs_machine_dependent: | |
368 | #ifdef BFD_ASSEMBLER | |
369 | md_convert_frag (stdoutput, sec, fragP); | |
370 | #else | |
371 | md_convert_frag (headers, fragP); | |
372 | #endif | |
373 | ||
d5364748 | 374 | assert (fragP->fr_next == NULL || (fragP->fr_next->fr_address - fragP->fr_address == fragP->fr_fix)); |
43ca9aa6 KR |
375 | |
376 | /* | |
377 | * After md_convert_frag, we make the frag into a ".space 0". | |
378 | * Md_convert_frag() should set up any fixSs and constants | |
379 | * required. | |
380 | */ | |
381 | frag_wane (fragP); | |
382 | break; | |
383 | ||
384 | #ifndef WORKING_DOT_WORD | |
385 | case rs_broken_word: | |
386 | { | |
387 | struct broken_word *lie; | |
388 | ||
389 | if (fragP->fr_subtype) | |
390 | { | |
391 | fragP->fr_fix += md_short_jump_size; | |
392 | for (lie = (struct broken_word *) (fragP->fr_symbol); | |
393 | lie && lie->dispfrag == fragP; | |
394 | lie = lie->next_broken_word) | |
395 | if (lie->added == 1) | |
396 | fragP->fr_fix += md_long_jump_size; | |
397 | } | |
398 | frag_wane (fragP); | |
399 | } | |
400 | break; | |
401 | #endif | |
402 | ||
403 | default: | |
404 | BAD_CASE (fragP->fr_type); | |
405 | break; | |
6efd877d | 406 | } |
65bfcf2e | 407 | } |
6efd877d | 408 | |
80aab579 ILT |
409 | #endif /* defined (BFD_ASSEMBLER) || !defined (BFD) */ |
410 | ||
43ca9aa6 KR |
411 | #ifdef BFD_ASSEMBLER |
412 | static void | |
413 | relax_and_size_seg (abfd, sec, xxx) | |
414 | bfd *abfd; | |
415 | asection *sec; | |
a58374d7 | 416 | PTR xxx; |
43ca9aa6 KR |
417 | { |
418 | flagword flags; | |
13e9182d KR |
419 | fragS *fragp; |
420 | segment_info_type *seginfo; | |
421 | int x; | |
422 | valueT size, newsize; | |
43ca9aa6 KR |
423 | |
424 | flags = bfd_get_section_flags (abfd, sec); | |
425 | ||
13e9182d KR |
426 | seginfo = (segment_info_type *) bfd_get_section_userdata (abfd, sec); |
427 | if (seginfo && seginfo->frchainP) | |
43ca9aa6 | 428 | { |
13e9182d KR |
429 | relax_segment (seginfo->frchainP->frch_root, sec); |
430 | for (fragp = seginfo->frchainP->frch_root; fragp; fragp = fragp->fr_next) | |
431 | cvt_frag_to_fill (sec, fragp); | |
432 | for (fragp = seginfo->frchainP->frch_root; | |
433 | fragp->fr_next; | |
434 | fragp = fragp->fr_next) | |
435 | /* walk to last elt */; | |
436 | size = fragp->fr_address + fragp->fr_fix; | |
437 | } | |
438 | else | |
439 | size = 0; | |
a58374d7 ILT |
440 | |
441 | if (size > 0 && ! seginfo->bss) | |
442 | flags |= SEC_HAS_CONTENTS; | |
443 | ||
444 | /* @@ This is just an approximation. */ | |
5f6efd5a | 445 | if (seginfo && seginfo->fix_root) |
a58374d7 ILT |
446 | flags |= SEC_RELOC; |
447 | else | |
448 | flags &= ~SEC_RELOC; | |
449 | x = bfd_set_section_flags (abfd, sec, flags); | |
450 | assert (x == true); | |
451 | ||
20b39b6f JL |
452 | newsize = md_section_align (sec, size); |
453 | x = bfd_set_section_size (abfd, sec, newsize); | |
13e9182d KR |
454 | assert (x == true); |
455 | ||
456 | /* If the size had to be rounded up, add some padding in the last | |
457 | non-empty frag. */ | |
13e9182d KR |
458 | assert (newsize >= size); |
459 | if (size != newsize) | |
460 | { | |
461 | fragS *last = seginfo->frchainP->frch_last; | |
462 | fragp = seginfo->frchainP->frch_root; | |
463 | while (fragp->fr_next != last) | |
464 | fragp = fragp->fr_next; | |
465 | last->fr_address = size; | |
466 | fragp->fr_offset += newsize - size; | |
467 | } | |
468 | ||
43ca9aa6 KR |
469 | #ifdef tc_frob_section |
470 | tc_frob_section (sec); | |
471 | #endif | |
472 | #ifdef obj_frob_section | |
473 | obj_frob_section (sec); | |
474 | #endif | |
475 | } | |
476 | ||
d5364748 KR |
477 | #ifdef DEBUG2 |
478 | static void | |
479 | dump_section_relocs (abfd, sec, stream_) | |
480 | bfd *abfd; | |
481 | asection *sec; | |
482 | char *stream_; | |
483 | { | |
484 | FILE *stream = (FILE *) stream_; | |
485 | segment_info_type *seginfo = seg_info (sec); | |
486 | fixS *fixp = seginfo->fix_root; | |
487 | ||
488 | if (!fixp) | |
489 | return; | |
490 | ||
491 | fprintf (stream, "sec %s relocs:\n", sec->name); | |
492 | while (fixp) | |
493 | { | |
494 | symbolS *s = fixp->fx_addsy; | |
495 | if (s) | |
496 | fprintf (stream, " %08x: %s(%s+%x)+%x\n", fixp, | |
497 | S_GET_NAME (s), s->bsym->section->name, | |
498 | S_GET_VALUE (s), fixp->fx_offset); | |
499 | else | |
500 | fprintf (stream, " %08x: type %d no sym\n", fixp, fixp->fx_r_type); | |
501 | fixp = fixp->fx_next; | |
502 | } | |
503 | } | |
504 | #else | |
505 | #define dump_section_relocs(ABFD,SEC,STREAM) (void)(ABFD,SEC,STREAM) | |
506 | #endif | |
507 | ||
98c6bbbe KR |
508 | #ifndef EMIT_SECTION_SYMBOLS |
509 | #define EMIT_SECTION_SYMBOLS 1 | |
510 | #endif | |
511 | ||
d5364748 KR |
512 | static void |
513 | adjust_reloc_syms (abfd, sec, xxx) | |
514 | bfd *abfd; | |
515 | asection *sec; | |
a58374d7 | 516 | PTR xxx; |
d5364748 KR |
517 | { |
518 | segment_info_type *seginfo = seg_info (sec); | |
519 | fixS *fixp; | |
520 | ||
521 | if (seginfo == NULL) | |
522 | return; | |
523 | ||
524 | dump_section_relocs (abfd, sec, stderr); | |
525 | ||
526 | for (fixp = seginfo->fix_root; fixp; fixp = fixp->fx_next) | |
98c6bbbe KR |
527 | if (fixp->fx_done) |
528 | /* ignore it */; | |
529 | else if (fixp->fx_addsy) | |
d5364748 KR |
530 | { |
531 | symbolS *sym = fixp->fx_addsy; | |
532 | asection *symsec = sym->bsym->section; | |
d5364748 | 533 | |
a58374d7 ILT |
534 | /* If it's one of these sections, assume the symbol is |
535 | definitely going to be output. The code in | |
536 | md_estimate_size_before_relax in tc-mips.c uses this test | |
537 | as well, so if you change this code you should look at that | |
538 | code. */ | |
d5364748 KR |
539 | if (symsec == &bfd_und_section |
540 | || symsec == &bfd_abs_section | |
541 | || bfd_is_com_section (symsec)) | |
80aab579 ILT |
542 | { |
543 | fixp->fx_addsy->sy_used_in_reloc = 1; | |
544 | continue; | |
545 | } | |
d5364748 KR |
546 | |
547 | /* Since we're reducing to section symbols, don't attempt to reduce | |
548 | anything that's already using one. */ | |
98c6bbbe | 549 | if (sym->bsym->flags & BSF_SECTION_SYM) |
80aab579 ILT |
550 | { |
551 | fixp->fx_addsy->sy_used_in_reloc = 1; | |
552 | continue; | |
553 | } | |
d5364748 KR |
554 | |
555 | /* Is there some other reason we can't adjust this one? (E.g., | |
556 | call/bal links in i960-bout symbols.) */ | |
557 | #ifdef obj_fix_adjustable | |
558 | if (! obj_fix_adjustable (fixp)) | |
80aab579 ILT |
559 | { |
560 | fixp->fx_addsy->sy_used_in_reloc = 1; | |
561 | continue; | |
562 | } | |
d5364748 | 563 | #endif |
efa0c22e KR |
564 | |
565 | /* Is there some other (target cpu dependent) reason we can't adjust | |
566 | this one? (E.g. relocations involving function addresses on | |
567 | the PA. */ | |
568 | #ifdef tc_fix_adjustable | |
569 | if (! tc_fix_adjustable (fixp)) | |
20b39b6f JL |
570 | { |
571 | fixp->fx_addsy->sy_used_in_reloc = 1; | |
572 | continue; | |
573 | } | |
efa0c22e KR |
574 | #endif |
575 | ||
d5364748 KR |
576 | /* If the section symbol isn't going to be output, the relocs |
577 | at least should still work. If not, figure out what to do | |
578 | when we run into that case. */ | |
579 | fixp->fx_offset += S_GET_VALUE (sym); | |
580 | if (sym->sy_frag) | |
581 | fixp->fx_offset += sym->sy_frag->fr_address; | |
6868afe6 | 582 | fixp->fx_addsy = section_symbol (symsec); |
80aab579 | 583 | fixp->fx_addsy->sy_used_in_reloc = 1; |
d5364748 | 584 | } |
e67a0640 KR |
585 | #ifdef RELOC_REQUIRES_SYMBOL |
586 | else | |
587 | { | |
588 | /* There was no symbol required by this relocation. However, | |
589 | BFD doesn't really handle relocations without symbols well. | |
590 | (At least, the COFF support doesn't.) So for now we fake up | |
591 | a local symbol in the absolute section. */ | |
592 | static symbolS *abs_sym; | |
593 | if (!abs_sym) | |
594 | { | |
98c6bbbe | 595 | abs_sym = section_symbol (absolute_section); |
e67a0640 KR |
596 | abs_sym->sy_used_in_reloc = 1; |
597 | } | |
598 | fixp->fx_addsy = abs_sym; | |
599 | } | |
600 | #endif | |
d5364748 KR |
601 | |
602 | dump_section_relocs (abfd, sec, stderr); | |
603 | } | |
604 | ||
43ca9aa6 | 605 | static void |
8d6c34a1 | 606 | write_relocs (abfd, sec, xxx) |
43ca9aa6 KR |
607 | bfd *abfd; |
608 | asection *sec; | |
a58374d7 | 609 | PTR xxx; |
43ca9aa6 KR |
610 | { |
611 | segment_info_type *seginfo = seg_info (sec); | |
80aab579 ILT |
612 | int i; |
613 | unsigned int n; | |
43ca9aa6 KR |
614 | arelent **relocs; |
615 | fixS *fixp; | |
98c6bbbe | 616 | char *err; |
43ca9aa6 | 617 | |
d5364748 KR |
618 | /* If seginfo is NULL, we did not create this section; don't do |
619 | anything with it. */ | |
620 | if (seginfo == NULL) | |
43ca9aa6 KR |
621 | return; |
622 | ||
623 | fixup_segment (seginfo->fix_root, sec); | |
624 | ||
3d3c5039 | 625 | n = 0; |
d5364748 KR |
626 | for (fixp = seginfo->fix_root; fixp; fixp = fixp->fx_next) |
627 | n++; | |
43ca9aa6 | 628 | |
d5364748 | 629 | #ifndef RELOC_EXPANSION_POSSIBLE |
43ca9aa6 | 630 | /* Set up reloc information as well. */ |
43ca9aa6 KR |
631 | relocs = (arelent **) bfd_alloc_by_size_t (stdoutput, |
632 | n * sizeof (arelent *)); | |
8d6c34a1 | 633 | memset ((char*)relocs, 0, n * sizeof (arelent*)); |
43ca9aa6 | 634 | |
3d3c5039 ILT |
635 | i = 0; |
636 | for (fixp = seginfo->fix_root; fixp != (fixS *) NULL; fixp = fixp->fx_next) | |
637 | { | |
638 | arelent *reloc; | |
3d3c5039 ILT |
639 | char *data; |
640 | bfd_reloc_status_type s; | |
641 | ||
98c6bbbe | 642 | if (fixp->fx_done) |
3d3c5039 | 643 | { |
3d3c5039 ILT |
644 | n--; |
645 | continue; | |
646 | } | |
647 | reloc = tc_gen_reloc (sec, fixp); | |
648 | if (!reloc) | |
649 | { | |
650 | n--; | |
651 | continue; | |
652 | } | |
653 | data = fixp->fx_frag->fr_literal + fixp->fx_where; | |
c43d56f7 | 654 | if (fixp->fx_where + fixp->fx_size |
3d3c5039 ILT |
655 | > fixp->fx_frag->fr_fix + fixp->fx_frag->fr_offset) |
656 | abort (); | |
335d35c8 | 657 | |
84fa9814 KR |
658 | if (reloc->howto->partial_inplace == false |
659 | && reloc->howto->pcrel_offset == true | |
660 | && reloc->howto->pc_relative == true) | |
661 | { | |
662 | /* bfd_perform_relocation screws this up */ | |
663 | reloc->addend += reloc->address; | |
664 | } | |
335d35c8 | 665 | /* Pass bogus address so that when bfd_perform_relocation adds |
f5c32424 KR |
666 | `reloc->address' back in, it'll come up with `data', which is where |
667 | we want it to operate. We can't just do it by fudging reloc->address, | |
668 | since that might be used in the calculations(?). */ | |
3d3c5039 | 669 | s = bfd_perform_relocation (stdoutput, reloc, data - reloc->address, |
98c6bbbe | 670 | sec, stdoutput, &err); |
3d3c5039 ILT |
671 | switch (s) |
672 | { | |
673 | case bfd_reloc_ok: | |
674 | break; | |
675 | default: | |
676 | as_fatal ("bad return from bfd_perform_relocation"); | |
677 | } | |
678 | relocs[i++] = reloc; | |
679 | } | |
d5364748 KR |
680 | #else |
681 | n = n * MAX_RELOC_EXPANSION; | |
682 | /* Set up reloc information as well. */ | |
683 | relocs = (arelent **) bfd_alloc_by_size_t (stdoutput, | |
684 | n * sizeof (arelent *)); | |
685 | ||
686 | i = 0; | |
687 | for (fixp = seginfo->fix_root; fixp != (fixS *) NULL; fixp = fixp->fx_next) | |
688 | { | |
689 | arelent **reloc; | |
d5364748 KR |
690 | char *data; |
691 | bfd_reloc_status_type s; | |
692 | int j; | |
693 | ||
98c6bbbe | 694 | if (fixp->fx_done) |
d5364748 | 695 | { |
d5364748 KR |
696 | n--; |
697 | continue; | |
698 | } | |
699 | reloc = tc_gen_reloc (sec, fixp); | |
700 | ||
701 | for (j = 0; reloc[j]; j++) | |
702 | { | |
703 | relocs[i++] = reloc[j]; | |
704 | assert(i <= n); | |
705 | } | |
706 | data = fixp->fx_frag->fr_literal + fixp->fx_where; | |
c43d56f7 | 707 | if (fixp->fx_where + fixp->fx_size |
d5364748 KR |
708 | > fixp->fx_frag->fr_fix + fixp->fx_frag->fr_offset) |
709 | abort (); | |
710 | for (j = 0; reloc[j]; j++) | |
711 | { | |
98c6bbbe | 712 | s = bfd_perform_relocation (stdoutput, reloc[j], |
a58374d7 | 713 | data - reloc[0]->address, |
98c6bbbe | 714 | sec, stdoutput, &err); |
d5364748 KR |
715 | switch (s) |
716 | { | |
98c6bbbe KR |
717 | case bfd_reloc_ok: |
718 | break; | |
719 | default: | |
720 | as_fatal ("bad return from bfd_perform_relocation"); | |
d5364748 KR |
721 | } |
722 | } | |
723 | } | |
724 | n = i; | |
725 | #endif | |
726 | ||
3d3c5039 ILT |
727 | if (n) |
728 | bfd_set_reloc (stdoutput, sec, relocs, n); | |
d5364748 KR |
729 | else |
730 | bfd_set_section_flags (abfd, sec, | |
80aab579 ILT |
731 | (bfd_get_section_flags (abfd, sec) |
732 | & (flagword) ~SEC_RELOC)); | |
98c6bbbe KR |
733 | |
734 | #ifdef DEBUG3 | |
d5364748 KR |
735 | { |
736 | int i; | |
737 | arelent *r; | |
738 | asymbol *s; | |
739 | fprintf (stderr, "relocs for sec %s\n", sec->name); | |
740 | for (i = 0; i < n; i++) | |
741 | { | |
742 | r = relocs[i]; | |
743 | s = *r->sym_ptr_ptr; | |
744 | fprintf (stderr, " reloc %2d @%08x off %4x : sym %-10s addend %x\n", | |
745 | i, r, r->address, s->name, r->addend); | |
746 | } | |
747 | } | |
748 | #endif | |
8d6c34a1 | 749 | } |
d5364748 | 750 | |
8d6c34a1 KR |
751 | static void |
752 | write_contents (abfd, sec, xxx) | |
753 | bfd *abfd; | |
754 | asection *sec; | |
a58374d7 | 755 | PTR xxx; |
8d6c34a1 KR |
756 | { |
757 | segment_info_type *seginfo = seg_info (sec); | |
758 | unsigned long offset = 0; | |
80aab579 | 759 | fragS *f; |
3d3c5039 ILT |
760 | |
761 | /* Write out the frags. */ | |
f37449aa ILT |
762 | if (seginfo == NULL |
763 | || ! (bfd_get_section_flags (abfd, sec) & SEC_HAS_CONTENTS)) | |
d5364748 KR |
764 | return; |
765 | ||
80aab579 ILT |
766 | for (f = seginfo->frchainP->frch_root; |
767 | f; | |
768 | f = f->fr_next) | |
43ca9aa6 KR |
769 | { |
770 | int x; | |
771 | unsigned long fill_size; | |
772 | char *fill_literal; | |
773 | long count; | |
774 | ||
80aab579 ILT |
775 | assert (f->fr_type == rs_fill); |
776 | if (f->fr_fix) | |
43ca9aa6 KR |
777 | { |
778 | x = bfd_set_section_contents (stdoutput, sec, | |
80aab579 ILT |
779 | f->fr_literal, (file_ptr) offset, |
780 | (bfd_size_type) f->fr_fix); | |
43ca9aa6 | 781 | assert (x == true); |
80aab579 | 782 | offset += f->fr_fix; |
43ca9aa6 | 783 | } |
80aab579 ILT |
784 | fill_literal = f->fr_literal + f->fr_fix; |
785 | fill_size = f->fr_var; | |
786 | count = f->fr_offset; | |
43ca9aa6 KR |
787 | assert (count >= 0); |
788 | if (fill_size && count) | |
789 | while (count--) | |
790 | { | |
791 | x = bfd_set_section_contents (stdoutput, sec, | |
80aab579 | 792 | fill_literal, (file_ptr) offset, |
d5364748 | 793 | (bfd_size_type) fill_size); |
43ca9aa6 KR |
794 | assert (x == true); |
795 | offset += fill_size; | |
796 | } | |
797 | } | |
43ca9aa6 KR |
798 | } |
799 | #endif | |
800 | ||
80aab579 | 801 | #if defined(BFD_ASSEMBLER) || (!defined (BFD) && !defined(OBJ_AOUT)) |
b23f6743 KR |
802 | static void |
803 | merge_data_into_text () | |
804 | { | |
4064305e | 805 | #if defined(BFD_ASSEMBLER) || defined(MANY_SEGMENTS) |
b23f6743 KR |
806 | seg_info (text_section)->frchainP->frch_last->fr_next = |
807 | seg_info (data_section)->frchainP->frch_root; | |
808 | seg_info (text_section)->frchainP->frch_last = | |
809 | seg_info (data_section)->frchainP->frch_last; | |
810 | seg_info (data_section)->frchainP = 0; | |
811 | #else | |
812 | fixS *tmp; | |
813 | ||
814 | text_last_frag->fr_next = data_frag_root; | |
815 | text_last_frag = data_last_frag; | |
816 | data_last_frag = NULL; | |
817 | data_frag_root = NULL; | |
818 | if (text_fix_root) | |
819 | { | |
820 | for (tmp = text_fix_root; tmp->fx_next; tmp = tmp->fx_next);; | |
821 | tmp->fx_next = data_fix_root; | |
822 | text_fix_tail = data_fix_tail; | |
823 | } | |
824 | else | |
825 | text_fix_root = data_fix_root; | |
826 | data_fix_root = NULL; | |
827 | #endif | |
828 | } | |
80aab579 | 829 | #endif /* BFD_ASSEMBLER || (! BFD && ! OBJ_AOUT) */ |
b23f6743 KR |
830 | |
831 | #if !defined (BFD_ASSEMBLER) && !defined (BFD) | |
832 | static void | |
833 | relax_and_size_all_segments () | |
834 | { | |
13e9182d KR |
835 | fragS *fragP; |
836 | ||
b23f6743 KR |
837 | relax_segment (text_frag_root, SEG_TEXT); |
838 | relax_segment (data_frag_root, SEG_DATA); | |
839 | relax_segment (bss_frag_root, SEG_BSS); | |
840 | /* | |
841 | * Now the addresses of frags are correct within the segment. | |
842 | */ | |
843 | ||
844 | know (text_last_frag->fr_type == rs_fill && text_last_frag->fr_offset == 0); | |
845 | H_SET_TEXT_SIZE (&headers, text_last_frag->fr_address); | |
846 | text_last_frag->fr_address = H_GET_TEXT_SIZE (&headers); | |
847 | ||
848 | /* | |
849 | * Join the 2 segments into 1 huge segment. | |
850 | * To do this, re-compute every rn_address in the SEG_DATA frags. | |
851 | * Then join the data frags after the text frags. | |
852 | * | |
853 | * Determine a_data [length of data segment]. | |
854 | */ | |
855 | if (data_frag_root) | |
856 | { | |
857 | register relax_addressT slide; | |
858 | ||
859 | know ((text_last_frag->fr_type == rs_fill) && (text_last_frag->fr_offset == 0)); | |
860 | ||
861 | H_SET_DATA_SIZE (&headers, data_last_frag->fr_address); | |
862 | data_last_frag->fr_address = H_GET_DATA_SIZE (&headers); | |
863 | slide = H_GET_TEXT_SIZE (&headers); /* & in file of the data segment. */ | |
864 | #ifdef OBJ_BOUT | |
865 | #define RoundUp(N,S) (((N)+(S)-1)&-(S)) | |
866 | /* For b.out: If the data section has a strict alignment | |
867 | requirement, its load address in the .o file will be | |
868 | rounded up from the size of the text section. These | |
869 | two values are *not* the same! Similarly for the bss | |
870 | section.... */ | |
871 | slide = RoundUp (slide, 1 << section_alignment[SEG_DATA]); | |
872 | #endif | |
873 | ||
874 | for (fragP = data_frag_root; fragP; fragP = fragP->fr_next) | |
875 | { | |
876 | fragP->fr_address += slide; | |
877 | } /* for each data frag */ | |
878 | ||
879 | know (text_last_frag != 0); | |
880 | text_last_frag->fr_next = data_frag_root; | |
881 | } | |
882 | else | |
883 | { | |
884 | H_SET_DATA_SIZE (&headers, 0); | |
885 | } | |
886 | ||
887 | #ifdef OBJ_BOUT | |
888 | /* See above comments on b.out data section address. */ | |
889 | { | |
890 | long bss_vma; | |
891 | if (data_last_frag == 0) | |
892 | bss_vma = H_GET_TEXT_SIZE (&headers); | |
893 | else | |
894 | bss_vma = data_last_frag->fr_address; | |
895 | bss_vma = RoundUp (bss_vma, 1 << section_alignment[SEG_BSS]); | |
896 | bss_address_frag.fr_address = bss_vma; | |
897 | } | |
898 | #else /* ! OBJ_BOUT */ | |
899 | bss_address_frag.fr_address = (H_GET_TEXT_SIZE (&headers) + | |
900 | H_GET_DATA_SIZE (&headers)); | |
901 | ||
efa0c22e | 902 | #endif /* ! OBJ_BOUT */ |
b23f6743 KR |
903 | |
904 | /* Slide all the frags */ | |
905 | if (bss_frag_root) | |
906 | { | |
907 | relax_addressT slide = bss_address_frag.fr_address; | |
908 | ||
909 | for (fragP = bss_frag_root; fragP; fragP = fragP->fr_next) | |
910 | { | |
911 | fragP->fr_address += slide; | |
912 | } /* for each bss frag */ | |
913 | } | |
914 | ||
b23f6743 KR |
915 | if (bss_last_frag) |
916 | H_SET_BSS_SIZE (&headers, | |
917 | bss_last_frag->fr_address - bss_frag_root->fr_address); | |
918 | else | |
919 | H_SET_BSS_SIZE (&headers, 0); | |
920 | } | |
921 | #endif /* ! BFD_ASSEMBLER && ! BFD */ | |
922 | ||
d5364748 KR |
923 | #if defined (BFD_ASSEMBLER) || !defined (BFD) |
924 | ||
6efd877d KR |
925 | void |
926 | write_object_file () | |
45432836 | 927 | { |
6efd877d | 928 | register struct frchain *frchainP; /* Track along all frchains. */ |
58d4951d | 929 | #if ! defined (BFD_ASSEMBLER) || ! defined (WORKING_DOT_WORD) |
6efd877d | 930 | register fragS *fragP; /* Track along all frags. */ |
58d4951d | 931 | #endif |
d5364748 | 932 | #if !defined (BFD_ASSEMBLER) && !defined (OBJ_VMS) |
6efd877d | 933 | long object_file_size; |
d5364748 | 934 | #endif |
6efd877d | 935 | |
43ca9aa6 KR |
936 | /* Do we really want to write it? */ |
937 | { | |
938 | int n_warns, n_errs; | |
939 | n_warns = had_warnings (); | |
940 | n_errs = had_errors (); | |
941 | /* The -Z flag indicates that an object file should be generated, | |
942 | regardless of warnings and errors. */ | |
943 | if (flagseen['Z']) | |
944 | { | |
945 | if (n_warns || n_errs) | |
946 | as_warn ("%d error%s, %d warning%s, generating bad object file.\n", | |
947 | n_errs, n_errs == 1 ? "" : "s", | |
948 | n_warns, n_warns == 1 ? "" : "s"); | |
949 | } | |
950 | else | |
951 | { | |
952 | if (n_errs) | |
953 | as_fatal ("%d error%s, %d warning%s, no object file generated.\n", | |
954 | n_errs, n_errs == 1 ? "" : "s", | |
955 | n_warns, n_warns == 1 ? "" : "s"); | |
956 | } | |
957 | } | |
958 | ||
3eb802b5 | 959 | #ifdef OBJ_VMS |
6efd877d | 960 | /* |
3eb802b5 ILT |
961 | * Under VMS we try to be compatible with VAX-11 "C". Thus, we |
962 | * call a routine to check for the definition of the procedure | |
963 | * "_main", and if so -- fix it up so that it can be program | |
964 | * entry point. | |
965 | */ | |
6efd877d | 966 | VMS_Check_For_Main (); |
fecd2382 | 967 | #endif /* VMS */ |
43ca9aa6 KR |
968 | |
969 | /* After every sub-segment, we fake an ".align ...". This conforms to | |
970 | BSD4.2 brane-damage. We then fake ".fill 0" because that is the kind of | |
971 | frag that requires least thought. ".align" frags like to have a | |
972 | following frag since that makes calculating their intended length | |
973 | trivial. | |
974 | ||
975 | @@ Is this really necessary?? */ | |
3eb802b5 | 976 | #ifndef SUB_SEGMENT_ALIGN |
43ca9aa6 | 977 | #ifdef BFD_ASSEMBLER |
f2f7d044 | 978 | #define SUB_SEGMENT_ALIGN(SEG) (0) |
43ca9aa6 | 979 | #else |
f2f7d044 | 980 | #define SUB_SEGMENT_ALIGN(SEG) (2) |
43ca9aa6 | 981 | #endif |
3eb802b5 | 982 | #endif |
6efd877d KR |
983 | for (frchainP = frchain_root; frchainP; frchainP = frchainP->frch_next) |
984 | { | |
43ca9aa6 | 985 | subseg_set (frchainP->frch_seg, frchainP->frch_subseg); |
f2f7d044 | 986 | frag_align (SUB_SEGMENT_ALIGN (now_seg), NOP_OPCODE); |
43ca9aa6 KR |
987 | /* frag_align will have left a new frag. |
988 | Use this last frag for an empty ".fill". | |
989 | ||
990 | For this segment ... | |
991 | Create a last frag. Do not leave a "being filled in frag". */ | |
6efd877d KR |
992 | frag_wane (frag_now); |
993 | frag_now->fr_fix = 0; | |
994 | know (frag_now->fr_next == NULL); | |
43ca9aa6 | 995 | } |
6efd877d | 996 | |
43ca9aa6 KR |
997 | /* From now on, we don't care about sub-segments. Build one frag chain |
998 | for each segment. Linked thru fr_next. */ | |
65bfcf2e | 999 | |
43ca9aa6 KR |
1000 | #ifdef BFD_ASSEMBLER |
1001 | /* Remove the sections created by gas for its own purposes. */ | |
1002 | { | |
1003 | asection **seclist, *sec; | |
1004 | seclist = &stdoutput->sections; | |
1005 | while (seclist && *seclist) | |
1006 | { | |
1007 | sec = *seclist; | |
5ac34ac3 | 1008 | while (sec == reg_section || sec == expr_section) |
43ca9aa6 KR |
1009 | { |
1010 | sec = sec->next; | |
1011 | *seclist = sec; | |
1012 | stdoutput->section_count--; | |
1013 | if (!sec) | |
1014 | break; | |
1015 | } | |
1016 | if (*seclist) | |
1017 | seclist = &(*seclist)->next; | |
1018 | } | |
1019 | } | |
1020 | ||
1021 | bfd_map_over_sections (stdoutput, chain_frchains_together, (char *) 0); | |
1022 | #else | |
6efd877d KR |
1023 | remove_subsegs (frchain_root, SEG_TEXT, &text_frag_root, &text_last_frag); |
1024 | remove_subsegs (data0_frchainP, SEG_DATA, &data_frag_root, &data_last_frag); | |
1025 | remove_subsegs (bss0_frchainP, SEG_BSS, &bss_frag_root, &bss_last_frag); | |
43ca9aa6 | 1026 | #endif |
6efd877d | 1027 | |
43ca9aa6 KR |
1028 | /* We have two segments. If user gave -R flag, then we must put the |
1029 | data frags into the text segment. Do this before relaxing so | |
1030 | we know to take advantage of -R and make shorter addresses. */ | |
1031 | #if !defined (OBJ_AOUT) || defined (BFD_ASSEMBLER) | |
6efd877d KR |
1032 | if (flagseen['R']) |
1033 | { | |
b23f6743 | 1034 | merge_data_into_text (); |
6efd877d KR |
1035 | } |
1036 | #endif | |
43ca9aa6 KR |
1037 | |
1038 | #ifdef BFD_ASSEMBLER | |
1039 | bfd_map_over_sections (stdoutput, relax_and_size_seg, (char *) 0); | |
1040 | #else | |
b23f6743 | 1041 | relax_and_size_all_segments (); |
43ca9aa6 | 1042 | #endif /* BFD_ASSEMBLER */ |
65bfcf2e | 1043 | |
43ca9aa6 | 1044 | #ifndef BFD_ASSEMBLER |
6efd877d | 1045 | /* |
7f2cb270 KR |
1046 | * |
1047 | * Crawl the symbol chain. | |
1048 | * | |
1049 | * For each symbol whose value depends on a frag, take the address of | |
1050 | * that frag and subsume it into the value of the symbol. | |
1051 | * After this, there is just one way to lookup a symbol value. | |
1052 | * Values are left in their final state for object file emission. | |
1053 | * We adjust the values of 'L' local symbols, even if we do | |
1054 | * not intend to emit them to the object file, because their values | |
1055 | * are needed for fix-ups. | |
1056 | * | |
1057 | * Unless we saw a -L flag, remove all symbols that begin with 'L' | |
1058 | * from the symbol chain. (They are still pointed to by the fixes.) | |
1059 | * | |
1060 | * Count the remaining symbols. | |
1061 | * Assign a symbol number to each symbol. | |
1062 | * Count the number of string-table chars we will emit. | |
1063 | * Put this info into the headers as appropriate. | |
1064 | * | |
1065 | */ | |
6efd877d KR |
1066 | know (zero_address_frag.fr_address == 0); |
1067 | string_byte_count = sizeof (string_byte_count); | |
1068 | ||
1069 | obj_crawl_symbol_chain (&headers); | |
1070 | ||
1071 | if (string_byte_count == sizeof (string_byte_count)) | |
43ca9aa6 | 1072 | string_byte_count = 0; |
6efd877d KR |
1073 | |
1074 | H_SET_STRING_SIZE (&headers, string_byte_count); | |
1075 | ||
1076 | /* | |
7f2cb270 KR |
1077 | * Addresses of frags now reflect addresses we use in the object file. |
1078 | * Symbol values are correct. | |
1079 | * Scan the frags, converting any ".org"s and ".align"s to ".fill"s. | |
1080 | * Also converting any machine-dependent frags using md_convert_frag(); | |
1081 | */ | |
6efd877d KR |
1082 | subseg_change (SEG_TEXT, 0); |
1083 | ||
1084 | for (fragP = text_frag_root; fragP; fragP = fragP->fr_next) | |
1085 | { | |
43ca9aa6 | 1086 | cvt_frag_to_fill (&headers, fragP); |
6efd877d | 1087 | |
43ca9aa6 KR |
1088 | /* Some assert macros don't work with # directives mixed in. */ |
1089 | #ifndef NDEBUG | |
1090 | if (!(fragP->fr_next == NULL | |
ebfb4167 | 1091 | #ifdef OBJ_BOUT |
43ca9aa6 | 1092 | || fragP->fr_next == data_frag_root |
ebfb4167 | 1093 | #endif |
6efd877d | 1094 | || ((fragP->fr_next->fr_address - fragP->fr_address) |
43ca9aa6 KR |
1095 | == (fragP->fr_fix + fragP->fr_offset * fragP->fr_var)))) |
1096 | abort (); | |
1097 | #endif | |
1098 | } | |
1099 | #endif /* ! BFD_ASSEMBLER */ | |
6efd877d | 1100 | |
fecd2382 | 1101 | #ifndef WORKING_DOT_WORD |
6efd877d KR |
1102 | { |
1103 | struct broken_word *lie; | |
1104 | struct broken_word **prevP; | |
1105 | ||
1106 | prevP = &broken_words; | |
1107 | for (lie = broken_words; lie; lie = lie->next_broken_word) | |
1108 | if (!lie->added) | |
a39116f1 | 1109 | { |
5ac34ac3 ILT |
1110 | expressionS exp; |
1111 | ||
1112 | exp.X_op = O_subtract; | |
1113 | exp.X_add_symbol = lie->add; | |
1114 | exp.X_op_symbol = lie->sub; | |
1115 | exp.X_add_number = lie->addnum; | |
43ca9aa6 | 1116 | #ifdef BFD_ASSEMBLER |
5ac34ac3 ILT |
1117 | fix_new_exp (lie->frag, |
1118 | lie->word_goes_here - lie->frag->fr_literal, | |
1119 | 2, &exp, 0, BFD_RELOC_NONE); | |
43ca9aa6 KR |
1120 | #else |
1121 | #if defined(TC_SPARC) || defined(TC_A29K) || defined(NEED_FX_R_TYPE) | |
5ac34ac3 ILT |
1122 | fix_new_exp (lie->frag, |
1123 | lie->word_goes_here - lie->frag->fr_literal, | |
1124 | 2, &exp, 0, NO_RELOC); | |
43ca9aa6 | 1125 | #else |
fecd2382 | 1126 | #ifdef TC_NS32K |
5ac34ac3 ILT |
1127 | fix_new_ns32k_exp (lie->frag, |
1128 | lie->word_goes_here - lie->frag->fr_literal, | |
1129 | 2, &exp, 0, 0, 2, 0, 0); | |
343fb08d | 1130 | #else |
5ac34ac3 ILT |
1131 | fix_new_exp (lie->frag, |
1132 | lie->word_goes_here - lie->frag->fr_literal, | |
1133 | 2, &exp, 0, 0); | |
fecd2382 | 1134 | #endif /* TC_NS32K */ |
43ca9aa6 KR |
1135 | #endif /* TC_SPARC|TC_A29K|NEED_FX_R_TYPE */ |
1136 | #endif /* BFD_ASSEMBLER */ | |
6efd877d | 1137 | *prevP = lie->next_broken_word; |
a39116f1 | 1138 | } |
6efd877d KR |
1139 | else |
1140 | prevP = &(lie->next_broken_word); | |
1141 | ||
1142 | for (lie = broken_words; lie;) | |
1143 | { | |
1144 | struct broken_word *untruth; | |
1145 | char *table_ptr; | |
d5364748 KR |
1146 | addressT table_addr; |
1147 | addressT from_addr, to_addr; | |
6efd877d KR |
1148 | int n, m; |
1149 | ||
6efd877d KR |
1150 | fragP = lie->dispfrag; |
1151 | ||
43ca9aa6 | 1152 | /* Find out how many broken_words go here. */ |
6efd877d KR |
1153 | n = 0; |
1154 | for (untruth = lie; untruth && untruth->dispfrag == fragP; untruth = untruth->next_broken_word) | |
1155 | if (untruth->added == 1) | |
1156 | n++; | |
1157 | ||
1158 | table_ptr = lie->dispfrag->fr_opcode; | |
1159 | table_addr = lie->dispfrag->fr_address + (table_ptr - lie->dispfrag->fr_literal); | |
43ca9aa6 KR |
1160 | /* Create the jump around the long jumps. This is a short |
1161 | jump from table_ptr+0 to table_ptr+n*long_jump_size. */ | |
6efd877d KR |
1162 | from_addr = table_addr; |
1163 | to_addr = table_addr + md_short_jump_size + n * md_long_jump_size; | |
1164 | md_create_short_jump (table_ptr, from_addr, to_addr, lie->dispfrag, lie->add); | |
1165 | table_ptr += md_short_jump_size; | |
1166 | table_addr += md_short_jump_size; | |
1167 | ||
1168 | for (m = 0; lie && lie->dispfrag == fragP; m++, lie = lie->next_broken_word) | |
1169 | { | |
1170 | if (lie->added == 2) | |
1171 | continue; | |
1172 | /* Patch the jump table */ | |
1173 | /* This is the offset from ??? to table_ptr+0 */ | |
d5364748 | 1174 | to_addr = table_addr - S_GET_VALUE (lie->sub); |
6efd877d KR |
1175 | md_number_to_chars (lie->word_goes_here, to_addr, 2); |
1176 | for (untruth = lie->next_broken_word; untruth && untruth->dispfrag == fragP; untruth = untruth->next_broken_word) | |
1177 | { | |
1178 | if (untruth->use_jump == lie) | |
1179 | md_number_to_chars (untruth->word_goes_here, to_addr, 2); | |
1180 | } | |
1181 | ||
1182 | /* Install the long jump */ | |
1183 | /* this is a long jump from table_ptr+0 to the final target */ | |
1184 | from_addr = table_addr; | |
1185 | to_addr = S_GET_VALUE (lie->add) + lie->addnum; | |
1186 | md_create_long_jump (table_ptr, from_addr, to_addr, lie->dispfrag, lie->add); | |
1187 | table_ptr += md_long_jump_size; | |
1188 | table_addr += md_long_jump_size; | |
1189 | } | |
1190 | } | |
1191 | } | |
fecd2382 | 1192 | #endif /* not WORKING_DOT_WORD */ |
6efd877d | 1193 | |
43ca9aa6 | 1194 | #ifndef BFD_ASSEMBLER |
3eb802b5 | 1195 | #ifndef OBJ_VMS |
6efd877d KR |
1196 | { /* not vms */ |
1197 | /* | |
3eb802b5 ILT |
1198 | * Scan every FixS performing fixups. We had to wait until now to do |
1199 | * this because md_convert_frag() may have made some fixSs. | |
1200 | */ | |
6efd877d KR |
1201 | int trsize, drsize; |
1202 | ||
1203 | subseg_change (SEG_TEXT, 0); | |
d5364748 | 1204 | trsize = md_reloc_size * fixup_segment (text_fix_root, SEG_TEXT); |
6efd877d | 1205 | subseg_change (SEG_DATA, 0); |
d5364748 | 1206 | drsize = md_reloc_size * fixup_segment (data_fix_root, SEG_DATA); |
6efd877d KR |
1207 | H_SET_RELOCATION_SIZE (&headers, trsize, drsize); |
1208 | ||
1209 | /* FIXME move this stuff into the pre-write-hook */ | |
1210 | H_SET_MAGIC_NUMBER (&headers, magic_number_for_object_file); | |
1211 | H_SET_ENTRY_POINT (&headers, 0); | |
1212 | ||
1213 | obj_pre_write_hook (&headers); /* extra coff stuff */ | |
6efd877d KR |
1214 | |
1215 | object_file_size = H_GET_FILE_SIZE (&headers); | |
1216 | next_object_file_charP = the_object_file = xmalloc (object_file_size); | |
1217 | ||
1218 | output_file_create (out_file_name); | |
1219 | ||
1220 | obj_header_append (&next_object_file_charP, &headers); | |
1221 | ||
1222 | know ((next_object_file_charP - the_object_file) == H_GET_HEADER_SIZE (&headers)); | |
1223 | ||
1224 | /* | |
43ca9aa6 KR |
1225 | * Emit code. |
1226 | */ | |
6efd877d KR |
1227 | for (fragP = text_frag_root; fragP; fragP = fragP->fr_next) |
1228 | { | |
1229 | register long count; | |
1230 | register char *fill_literal; | |
1231 | register long fill_size; | |
1232 | ||
1233 | know (fragP->fr_type == rs_fill); | |
1234 | append (&next_object_file_charP, fragP->fr_literal, (unsigned long) fragP->fr_fix); | |
1235 | fill_literal = fragP->fr_literal + fragP->fr_fix; | |
1236 | fill_size = fragP->fr_var; | |
1237 | know (fragP->fr_offset >= 0); | |
1238 | ||
1239 | for (count = fragP->fr_offset; count; count--) | |
1240 | { | |
1241 | append (&next_object_file_charP, fill_literal, (unsigned long) fill_size); | |
1242 | } /* for each */ | |
1243 | ||
1244 | } /* for each code frag. */ | |
1245 | ||
1246 | know ((next_object_file_charP - the_object_file) == (H_GET_HEADER_SIZE (&headers) + H_GET_TEXT_SIZE (&headers) + H_GET_DATA_SIZE (&headers))); | |
1247 | ||
1248 | /* | |
43ca9aa6 KR |
1249 | * Emit relocations. |
1250 | */ | |
6efd877d KR |
1251 | obj_emit_relocations (&next_object_file_charP, text_fix_root, (relax_addressT) 0); |
1252 | 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 | 1253 | #ifdef TC_I960 |
6efd877d | 1254 | /* Make addresses in data relocation directives relative to beginning of |
43ca9aa6 KR |
1255 | * first data fragment, not end of last text fragment: alignment of the |
1256 | * start of the data segment may place a gap between the segments. | |
1257 | */ | |
6efd877d | 1258 | obj_emit_relocations (&next_object_file_charP, data_fix_root, data0_frchainP->frch_root->fr_address); |
fecd2382 | 1259 | #else /* TC_I960 */ |
6efd877d | 1260 | obj_emit_relocations (&next_object_file_charP, data_fix_root, text_last_frag->fr_address); |
fecd2382 | 1261 | #endif /* TC_I960 */ |
6efd877d KR |
1262 | |
1263 | 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))); | |
1264 | ||
1265 | /* | |
43ca9aa6 KR |
1266 | * Emit line number entries. |
1267 | */ | |
6efd877d KR |
1268 | OBJ_EMIT_LINENO (&next_object_file_charP, lineno_rootP, the_object_file); |
1269 | 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))); | |
1270 | ||
1271 | /* | |
3eb802b5 ILT |
1272 | * Emit symbols. |
1273 | */ | |
6efd877d KR |
1274 | obj_emit_symbols (&next_object_file_charP, symbol_rootP); |
1275 | 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))); | |
1276 | ||
1277 | /* | |
3eb802b5 ILT |
1278 | * Emit strings. |
1279 | */ | |
6efd877d KR |
1280 | |
1281 | if (string_byte_count > 0) | |
1282 | { | |
1283 | obj_emit_strings (&next_object_file_charP); | |
1284 | } /* only if we have a string table */ | |
1285 | ||
45432836 | 1286 | #ifdef BFD_HEADERS |
6efd877d KR |
1287 | bfd_seek (stdoutput, 0, 0); |
1288 | bfd_write (the_object_file, 1, object_file_size, stdoutput); | |
45432836 | 1289 | #else |
6efd877d KR |
1290 | |
1291 | /* Write the data to the file */ | |
1292 | output_file_append (the_object_file, object_file_size, out_file_name); | |
45432836 | 1293 | #endif |
6efd877d KR |
1294 | } /* non vms output */ |
1295 | #else /* VMS */ | |
1296 | /* | |
3eb802b5 ILT |
1297 | * Now do the VMS-dependent part of writing the object file |
1298 | */ | |
85825401 ILT |
1299 | VMS_write_object_file (H_GET_TEXT_SIZE (&headers), |
1300 | H_GET_DATA_SIZE (&headers), | |
1301 | H_GET_BSS_SIZE (&headers), | |
3eb802b5 | 1302 | text_frag_root, data_frag_root); |
6efd877d | 1303 | #endif /* VMS */ |
43ca9aa6 | 1304 | #else /* BFD_ASSEMBLER */ |
6efd877d | 1305 | |
d5364748 KR |
1306 | bfd_map_over_sections (stdoutput, adjust_reloc_syms, (char *)0); |
1307 | ||
43ca9aa6 KR |
1308 | /* Set up symbol table, and write it out. */ |
1309 | if (symbol_rootP) | |
1310 | { | |
80aab579 ILT |
1311 | unsigned int i = 0; |
1312 | unsigned int n; | |
43ca9aa6 KR |
1313 | symbolS *symp; |
1314 | ||
1315 | for (symp = symbol_rootP; symp; symp = symbol_next (symp)) | |
1316 | { | |
5868b1fe ILT |
1317 | if (! symp->sy_resolved) |
1318 | { | |
5ac34ac3 | 1319 | if (symp->sy_value.X_op == O_constant) |
5868b1fe ILT |
1320 | { |
1321 | /* This is the normal case; skip the call. */ | |
1322 | S_SET_VALUE (symp, | |
1323 | (S_GET_VALUE (symp) | |
1324 | + symp->sy_frag->fr_address)); | |
1325 | symp->sy_resolved = 1; | |
1326 | } | |
1327 | else | |
1328 | resolve_symbol_value (symp); | |
1329 | } | |
1330 | ||
43ca9aa6 KR |
1331 | /* So far, common symbols have been treated like undefined symbols. |
1332 | Put them in the common section now. */ | |
1333 | if (S_IS_DEFINED (symp) == 0 | |
1334 | && S_GET_VALUE (symp) != 0) | |
1335 | S_SET_SEGMENT (symp, &bfd_com_section); | |
1336 | #if 0 | |
5868b1fe | 1337 | printf ("symbol `%s'\n\t@%x: value=%d flags=%x seg=%s\n", |
43ca9aa6 KR |
1338 | S_GET_NAME (symp), symp, |
1339 | S_GET_VALUE (symp), | |
d5364748 | 1340 | symp->bsym->flags, |
43ca9aa6 KR |
1341 | segment_name (symp->bsym->section)); |
1342 | #endif | |
335d35c8 | 1343 | |
80aab579 | 1344 | #ifdef obj_frob_symbol |
335d35c8 JL |
1345 | { |
1346 | int punt = 0; | |
1347 | obj_frob_symbol (symp, punt); | |
1348 | if (punt) | |
98c6bbbe | 1349 | goto punt_it_if_unused; |
335d35c8 | 1350 | } |
43ca9aa6 KR |
1351 | #endif |
1352 | #ifdef tc_frob_symbol | |
335d35c8 JL |
1353 | { |
1354 | int punt = 0; | |
1355 | tc_frob_symbol (symp, punt); | |
1356 | if (punt) | |
98c6bbbe | 1357 | goto punt_it_if_unused; |
335d35c8 | 1358 | } |
43ca9aa6 | 1359 | #endif |
80aab579 | 1360 | |
98c6bbbe KR |
1361 | if (! EMIT_SECTION_SYMBOLS |
1362 | && (symp->bsym->flags & BSF_SECTION_SYM)) | |
1363 | goto punt_it; | |
1364 | ||
43ca9aa6 KR |
1365 | /* If we don't want to keep this symbol, splice it out of the |
1366 | chain now. */ | |
335d35c8 | 1367 | if (S_IS_LOCAL (symp)) |
43ca9aa6 | 1368 | { |
98c6bbbe KR |
1369 | #if defined (obj_frob_symbol) || defined (tc_frob_symbol) |
1370 | punt_it_if_unused: | |
1371 | #endif | |
335d35c8 JL |
1372 | if (! symp->sy_used_in_reloc) |
1373 | { | |
1374 | symbolS *prev, *next; | |
98c6bbbe | 1375 | punt_it: |
335d35c8 JL |
1376 | prev = symbol_previous (symp); |
1377 | next = symbol_next (symp); | |
b23f6743 | 1378 | #ifdef DEBUG_SYMS |
335d35c8 | 1379 | verify_symbol_chain_2 (symp); |
43ca9aa6 | 1380 | #endif |
335d35c8 JL |
1381 | if (prev) |
1382 | { | |
1383 | symbol_next (prev) = next; | |
1384 | symp = prev; | |
1385 | } | |
1386 | else if (symp == symbol_rootP) | |
1387 | symbol_rootP = next; | |
1388 | else | |
1389 | abort (); | |
1390 | if (next) | |
1391 | symbol_previous (next) = prev; | |
1392 | else | |
1393 | symbol_lastP = prev; | |
b23f6743 | 1394 | #ifdef DEBUG_SYMS |
335d35c8 JL |
1395 | if (prev) |
1396 | verify_symbol_chain_2 (prev); | |
1397 | else if (next) | |
1398 | verify_symbol_chain_2 (next); | |
45432836 | 1399 | #endif |
335d35c8 JL |
1400 | continue; |
1401 | } | |
43ca9aa6 | 1402 | } |
85051959 | 1403 | |
80aab579 ILT |
1404 | /* Make sure we really got a value for the symbol. */ |
1405 | if (! symp->sy_resolved) | |
1406 | { | |
1407 | as_bad ("can't resolve value for symbol \"%s\"", | |
1408 | S_GET_NAME (symp)); | |
1409 | symp->sy_resolved = 1; | |
1410 | } | |
1411 | ||
85051959 ILT |
1412 | /* Set the value into the BFD symbol. Up til now the value |
1413 | has only been kept in the gas symbolS struct. */ | |
1414 | symp->bsym->value = S_GET_VALUE (symp); | |
1415 | ||
43ca9aa6 KR |
1416 | i++; |
1417 | } | |
1418 | n = i; | |
1419 | if (n) | |
1420 | { | |
1421 | asymbol **asympp; | |
1422 | boolean result; | |
d5364748 | 1423 | extern PTR bfd_alloc PARAMS ((bfd *, size_t)); |
43ca9aa6 | 1424 | |
d5364748 KR |
1425 | asympp = (asymbol **) bfd_alloc (stdoutput, |
1426 | n * sizeof (asymbol *)); | |
43ca9aa6 KR |
1427 | symp = symbol_rootP; |
1428 | for (i = 0; i < n; i++, symp = symbol_next (symp)) | |
1429 | { | |
1430 | asympp[i] = symp->bsym; | |
1431 | symp->written = 1; | |
1432 | } | |
1433 | result = bfd_set_symtab (stdoutput, asympp, n); | |
1434 | assert (result == true); | |
1435 | } | |
1436 | } | |
1437 | ||
f2f7d044 | 1438 | #ifdef obj_frob_file |
85051959 ILT |
1439 | /* If obj_frob_file changes the symbol value at this point, it is |
1440 | responsible for moving the changed value into symp->bsym->value | |
1441 | as well. Hopefully all symbol value changing can be done in | |
1442 | {obj,tc}_frob_symbol. */ | |
f2f7d044 ILT |
1443 | obj_frob_file (); |
1444 | #endif | |
1445 | ||
43ca9aa6 KR |
1446 | /* Now that all the sizes are known, and contents correct, we can |
1447 | start writing the file. */ | |
8d6c34a1 KR |
1448 | bfd_map_over_sections (stdoutput, write_relocs, (char *) 0); |
1449 | ||
43ca9aa6 | 1450 | bfd_map_over_sections (stdoutput, write_contents, (char *) 0); |
43ca9aa6 KR |
1451 | #endif /* BFD_ASSEMBLER */ |
1452 | } | |
d5364748 | 1453 | #endif /* ! BFD */ |
fecd2382 RP |
1454 | |
1455 | /* | |
1456 | * relax_segment() | |
1457 | * | |
1458 | * Now we have a segment, not a crowd of sub-segments, we can make fr_address | |
1459 | * values. | |
1460 | * | |
1461 | * Relax the frags. | |
1462 | * | |
1463 | * After this, all frags in this segment have addresses that are correct | |
1464 | * within the segment. Since segments live in different file addresses, | |
1465 | * these frag addresses may not be the same as final object-file addresses. | |
1466 | */ | |
45432836 | 1467 | |
a58374d7 ILT |
1468 | #ifndef md_relax_frag |
1469 | ||
d5364748 | 1470 | /* Subroutines of relax_segment. */ |
43ca9aa6 KR |
1471 | static int |
1472 | is_dnrange (f1, f2) | |
1473 | struct frag *f1; | |
1474 | struct frag *f2; | |
1475 | { | |
1476 | for (; f1; f1 = f1->fr_next) | |
1477 | if (f1->fr_next == f2) | |
1478 | return 1; | |
1479 | return 0; | |
1480 | } | |
1481 | ||
a58374d7 ILT |
1482 | #endif /* ! defined (md_relax_frag) */ |
1483 | ||
43ca9aa6 | 1484 | /* Relax_align. Advance location counter to next address that has 'alignment' |
d5364748 | 1485 | lowest order bits all 0s, return size of adjustment made. */ |
43ca9aa6 KR |
1486 | static relax_addressT |
1487 | relax_align (address, alignment) | |
1488 | register relax_addressT address; /* Address now. */ | |
d5364748 | 1489 | register int alignment; /* Alignment (binary). */ |
43ca9aa6 KR |
1490 | { |
1491 | relax_addressT mask; | |
1492 | relax_addressT new_address; | |
1493 | ||
1494 | mask = ~((~0) << alignment); | |
1495 | new_address = (address + mask) & (~mask); | |
1496 | if (linkrelax) | |
1497 | /* We must provide lots of padding, so the linker can discard it | |
1498 | when needed. The linker will not add extra space, ever. */ | |
1499 | new_address += (1 << alignment); | |
1500 | return (new_address - address); | |
1501 | } | |
45432836 | 1502 | |
6efd877d KR |
1503 | void |
1504 | relax_segment (segment_frag_root, segment) | |
1505 | struct frag *segment_frag_root; | |
43ca9aa6 | 1506 | segT segment; |
fecd2382 | 1507 | { |
6efd877d KR |
1508 | register struct frag *fragP; |
1509 | register relax_addressT address; | |
43ca9aa6 | 1510 | #if !defined (MANY_SEGMENTS) && !defined (BFD_ASSEMBLER) |
6efd877d | 1511 | know (segment == SEG_DATA || segment == SEG_TEXT || segment == SEG_BSS); |
45432836 | 1512 | #endif |
6efd877d KR |
1513 | /* In case md_estimate_size_before_relax() wants to make fixSs. */ |
1514 | subseg_change (segment, 0); | |
1515 | ||
7f2cb270 KR |
1516 | /* For each frag in segment: count and store (a 1st guess of) |
1517 | fr_address. */ | |
6efd877d KR |
1518 | address = 0; |
1519 | for (fragP = segment_frag_root; fragP; fragP = fragP->fr_next) | |
1520 | { | |
1521 | fragP->fr_address = address; | |
1522 | address += fragP->fr_fix; | |
1523 | ||
1524 | switch (fragP->fr_type) | |
1525 | { | |
1526 | case rs_fill: | |
1527 | address += fragP->fr_offset * fragP->fr_var; | |
1528 | break; | |
1529 | ||
1530 | case rs_align: | |
98c6bbbe KR |
1531 | { |
1532 | int offset = relax_align (address, (int) fragP->fr_offset); | |
1533 | if (offset % fragP->fr_var != 0) | |
1534 | { | |
1535 | as_bad ("alignment padding (%d bytes) not a multiple of %d", | |
1536 | offset, fragP->fr_var); | |
1537 | offset -= (offset % fragP->fr_var); | |
1538 | } | |
1539 | address += offset; | |
1540 | } | |
6efd877d KR |
1541 | break; |
1542 | ||
1543 | case rs_org: | |
7f2cb270 | 1544 | /* Assume .org is nugatory. It will grow with 1st relax. */ |
6efd877d KR |
1545 | break; |
1546 | ||
1547 | case rs_machine_dependent: | |
1548 | address += md_estimate_size_before_relax (fragP, segment); | |
1549 | break; | |
1550 | ||
fecd2382 | 1551 | #ifndef WORKING_DOT_WORD |
6efd877d KR |
1552 | /* Broken words don't concern us yet */ |
1553 | case rs_broken_word: | |
1554 | break; | |
fecd2382 | 1555 | #endif |
6efd877d KR |
1556 | |
1557 | default: | |
1558 | BAD_CASE (fragP->fr_type); | |
1559 | break; | |
1560 | } /* switch(fr_type) */ | |
1561 | } /* for each frag in the segment */ | |
1562 | ||
7f2cb270 | 1563 | /* Do relax(). */ |
6efd877d | 1564 | { |
7f2cb270 | 1565 | long stretch; /* May be any size, 0 or negative. */ |
6efd877d KR |
1566 | /* Cumulative number of addresses we have */ |
1567 | /* relaxed this pass. */ | |
1568 | /* We may have relaxed more than one address. */ | |
7f2cb270 KR |
1569 | long stretched; /* Have we stretched on this pass? */ |
1570 | /* This is 'cuz stretch may be zero, when, in fact some piece of code | |
1571 | grew, and another shrank. If a branch instruction doesn't fit anymore, | |
1572 | we could be scrod. */ | |
6efd877d KR |
1573 | |
1574 | do | |
1575 | { | |
1576 | stretch = stretched = 0; | |
1577 | for (fragP = segment_frag_root; fragP; fragP = fragP->fr_next) | |
1578 | { | |
7f2cb270 KR |
1579 | long growth = 0; |
1580 | unsigned long was_address; | |
1581 | long offset; | |
1582 | symbolS *symbolP; | |
1583 | long target; | |
1584 | long after; | |
6efd877d KR |
1585 | |
1586 | was_address = fragP->fr_address; | |
1587 | address = fragP->fr_address += stretch; | |
1588 | symbolP = fragP->fr_symbol; | |
1589 | offset = fragP->fr_offset; | |
6efd877d KR |
1590 | |
1591 | switch (fragP->fr_type) | |
1592 | { | |
1593 | case rs_fill: /* .fill never relaxes. */ | |
1594 | growth = 0; | |
1595 | break; | |
1596 | ||
fecd2382 | 1597 | #ifndef WORKING_DOT_WORD |
6efd877d | 1598 | /* JF: This is RMS's idea. I do *NOT* want to be blamed |
7f2cb270 KR |
1599 | for it I do not want to write it. I do not want to have |
1600 | anything to do with it. This is not the proper way to | |
1601 | implement this misfeature. */ | |
6efd877d KR |
1602 | case rs_broken_word: |
1603 | { | |
1604 | struct broken_word *lie; | |
1605 | struct broken_word *untruth; | |
6efd877d KR |
1606 | |
1607 | /* Yes this is ugly (storing the broken_word pointer | |
7f2cb270 KR |
1608 | in the symbol slot). Still, this whole chunk of |
1609 | code is ugly, and I don't feel like doing anything | |
1610 | about it. Think of it as stubbornness in action. */ | |
6efd877d KR |
1611 | growth = 0; |
1612 | for (lie = (struct broken_word *) (fragP->fr_symbol); | |
1613 | lie && lie->dispfrag == fragP; | |
1614 | lie = lie->next_broken_word) | |
1615 | { | |
1616 | ||
1617 | if (lie->added) | |
1618 | continue; | |
1619 | ||
7f2cb270 KR |
1620 | offset = (lie->add->sy_frag->fr_address |
1621 | + S_GET_VALUE (lie->add) | |
1622 | + lie->addnum | |
1623 | - (lie->sub->sy_frag->fr_address | |
1624 | + S_GET_VALUE (lie->sub))); | |
6efd877d KR |
1625 | if (offset <= -32768 || offset >= 32767) |
1626 | { | |
1627 | if (flagseen['K']) | |
d5364748 KR |
1628 | { |
1629 | char buf[50]; | |
80aab579 | 1630 | sprint_value (buf, (addressT) lie->addnum); |
d5364748 KR |
1631 | as_warn (".word %s-%s+%s didn't fit", |
1632 | S_GET_NAME (lie->add), | |
1633 | S_GET_NAME (lie->sub), | |
1634 | buf); | |
1635 | } | |
6efd877d KR |
1636 | lie->added = 1; |
1637 | if (fragP->fr_subtype == 0) | |
1638 | { | |
1639 | fragP->fr_subtype++; | |
1640 | growth += md_short_jump_size; | |
1641 | } | |
7f2cb270 KR |
1642 | for (untruth = lie->next_broken_word; |
1643 | untruth && untruth->dispfrag == lie->dispfrag; | |
1644 | untruth = untruth->next_broken_word) | |
6efd877d KR |
1645 | if ((untruth->add->sy_frag == lie->add->sy_frag) |
1646 | && S_GET_VALUE (untruth->add) == S_GET_VALUE (lie->add)) | |
1647 | { | |
1648 | untruth->added = 2; | |
1649 | untruth->use_jump = lie; | |
1650 | } | |
1651 | growth += md_long_jump_size; | |
1652 | } | |
1653 | } | |
1654 | ||
1655 | break; | |
1656 | } /* case rs_broken_word */ | |
fecd2382 | 1657 | #endif |
6efd877d | 1658 | case rs_align: |
43ca9aa6 KR |
1659 | growth = (relax_align ((relax_addressT) (address |
1660 | + fragP->fr_fix), | |
d5364748 | 1661 | (int) offset) |
43ca9aa6 KR |
1662 | - relax_align ((relax_addressT) (was_address |
1663 | + fragP->fr_fix), | |
d5364748 | 1664 | (int) offset)); |
6efd877d KR |
1665 | break; |
1666 | ||
1667 | case rs_org: | |
1668 | target = offset; | |
1669 | ||
1670 | if (symbolP) | |
1671 | { | |
43ca9aa6 KR |
1672 | #if !defined (MANY_SEGMENTS) && !defined (BFD_ASSEMBLER) |
1673 | know ((S_GET_SEGMENT (symbolP) == SEG_ABSOLUTE) | |
1674 | || (S_GET_SEGMENT (symbolP) == SEG_DATA) | |
1675 | || (S_GET_SEGMENT (symbolP) == SEG_TEXT) | |
1676 | || S_GET_SEGMENT (symbolP) == SEG_BSS); | |
6efd877d | 1677 | know (symbolP->sy_frag); |
43ca9aa6 KR |
1678 | know (!(S_GET_SEGMENT (symbolP) == SEG_ABSOLUTE) |
1679 | || (symbolP->sy_frag == &zero_address_frag)); | |
45432836 | 1680 | #endif |
6efd877d KR |
1681 | target += S_GET_VALUE (symbolP) |
1682 | + symbolP->sy_frag->fr_address; | |
1683 | } /* if we have a symbol */ | |
1684 | ||
1685 | know (fragP->fr_next); | |
1686 | after = fragP->fr_next->fr_address; | |
1687 | growth = ((target - after) > 0) ? (target - after) : 0; | |
43ca9aa6 KR |
1688 | /* Growth may be negative, but variable part of frag |
1689 | cannot have fewer than 0 chars. That is, we can't | |
1690 | .org backwards. */ | |
6efd877d KR |
1691 | |
1692 | growth -= stretch; /* This is an absolute growth factor */ | |
1693 | break; | |
1694 | ||
1695 | case rs_machine_dependent: | |
a58374d7 ILT |
1696 | #ifdef md_relax_frag |
1697 | growth = md_relax_frag (fragP, stretch); | |
1698 | #else | |
1699 | /* The default way to relax a frag is to look through | |
1700 | md_relax_table. */ | |
6efd877d | 1701 | { |
7f2cb270 KR |
1702 | const relax_typeS *this_type; |
1703 | const relax_typeS *start_type; | |
1704 | relax_substateT next_state; | |
1705 | relax_substateT this_state; | |
80aab579 | 1706 | long aim; |
6efd877d | 1707 | |
7f2cb270 KR |
1708 | this_state = fragP->fr_subtype; |
1709 | start_type = this_type = md_relax_table + this_state; | |
6efd877d KR |
1710 | target = offset; |
1711 | ||
1712 | if (symbolP) | |
1713 | { | |
80aab579 | 1714 | #ifndef DIFF_EXPR_OK |
43ca9aa6 KR |
1715 | #if !defined (MANY_SEGMENTS) && !defined (BFD_ASSEMBLER) |
1716 | know ((S_GET_SEGMENT (symbolP) == SEG_ABSOLUTE) | |
1717 | || (S_GET_SEGMENT (symbolP) == SEG_DATA) | |
1718 | || (S_GET_SEGMENT (symbolP) == SEG_BSS) | |
1719 | || (S_GET_SEGMENT (symbolP) == SEG_TEXT)); | |
45432836 | 1720 | #endif |
6efd877d | 1721 | know (symbolP->sy_frag); |
80aab579 | 1722 | #endif |
43ca9aa6 KR |
1723 | know (!(S_GET_SEGMENT (symbolP) == absolute_section) |
1724 | || symbolP->sy_frag == &zero_address_frag); | |
6efd877d KR |
1725 | target += |
1726 | S_GET_VALUE (symbolP) | |
1727 | + symbolP->sy_frag->fr_address; | |
1728 | ||
1729 | /* If frag has yet to be reached on this pass, | |
7f2cb270 KR |
1730 | assume it will move by STRETCH just as we did. |
1731 | If this is not so, it will be because some frag | |
d5364748 KR |
1732 | between grows, and that will force another pass. |
1733 | ||
1734 | Beware zero-length frags. | |
1735 | ||
1736 | There should be a faster way to do this. */ | |
6efd877d KR |
1737 | |
1738 | if (symbolP->sy_frag->fr_address >= was_address | |
1739 | && is_dnrange (fragP, symbolP->sy_frag)) | |
1740 | { | |
1741 | target += stretch; | |
7f2cb270 | 1742 | } |
d5364748 | 1743 | } |
6efd877d KR |
1744 | |
1745 | aim = target - address - fragP->fr_fix; | |
1746 | /* The displacement is affected by the instruction size | |
7f2cb270 KR |
1747 | for the 32k architecture. I think we ought to be able |
1748 | to add fragP->fr_pcrel_adjust in all cases (it should be | |
1749 | zero if not used), but just in case it breaks something | |
1750 | else we'll put this inside #ifdef NS32K ... #endif */ | |
d5364748 KR |
1751 | #ifndef TC_NS32K |
1752 | if (fragP->fr_pcrel_adjust) | |
1753 | abort (); | |
1754 | #endif | |
6efd877d | 1755 | aim += fragP->fr_pcrel_adjust; |
6efd877d KR |
1756 | |
1757 | if (aim < 0) | |
1758 | { | |
1759 | /* Look backwards. */ | |
1760 | for (next_state = this_type->rlx_more; next_state;) | |
7f2cb270 KR |
1761 | if (aim >= this_type->rlx_backward) |
1762 | next_state = 0; | |
1763 | else | |
1764 | { | |
1765 | /* Grow to next state. */ | |
1766 | this_state = next_state; | |
1767 | this_type = md_relax_table + this_state; | |
1768 | next_state = this_type->rlx_more; | |
1769 | } | |
6efd877d KR |
1770 | } |
1771 | else | |
1772 | { | |
a39116f1 | 1773 | #ifdef M68K_AIM_KLUDGE |
6efd877d | 1774 | M68K_AIM_KLUDGE (aim, this_state, this_type); |
fecd2382 | 1775 | #endif |
6efd877d KR |
1776 | /* Look forwards. */ |
1777 | for (next_state = this_type->rlx_more; next_state;) | |
7f2cb270 KR |
1778 | if (aim <= this_type->rlx_forward) |
1779 | next_state = 0; | |
1780 | else | |
1781 | { | |
1782 | /* Grow to next state. */ | |
1783 | this_state = next_state; | |
1784 | this_type = md_relax_table + this_state; | |
1785 | next_state = this_type->rlx_more; | |
1786 | } | |
6efd877d KR |
1787 | } |
1788 | ||
7f2cb270 KR |
1789 | growth = this_type->rlx_length - start_type->rlx_length; |
1790 | if (growth != 0) | |
6efd877d | 1791 | fragP->fr_subtype = this_state; |
7f2cb270 | 1792 | } |
a58374d7 | 1793 | #endif |
7f2cb270 | 1794 | break; |
6efd877d KR |
1795 | |
1796 | default: | |
1797 | BAD_CASE (fragP->fr_type); | |
1798 | break; | |
1799 | } | |
1800 | if (growth) | |
1801 | { | |
1802 | stretch += growth; | |
1803 | stretched++; | |
1804 | } | |
1805 | } /* For each frag in the segment. */ | |
1806 | } | |
1807 | while (stretched); /* Until nothing further to relax. */ | |
1808 | } /* do_relax */ | |
1809 | ||
1810 | /* | |
7f2cb270 KR |
1811 | * We now have valid fr_address'es for each frag. |
1812 | */ | |
6efd877d KR |
1813 | |
1814 | /* | |
7f2cb270 KR |
1815 | * All fr_address's are correct, relative to their own segment. |
1816 | * We have made all the fixS we will ever make. | |
1817 | */ | |
6efd877d | 1818 | } /* relax_segment() */ |
fecd2382 | 1819 | |
80aab579 ILT |
1820 | #if defined (BFD_ASSEMBLER) || !defined (BFD) |
1821 | ||
fecd2382 | 1822 | /* fixup_segment() |
6efd877d | 1823 | |
fecd2382 RP |
1824 | Go through all the fixS's in a segment and see which ones can be |
1825 | handled now. (These consist of fixS where we have since discovered | |
1826 | the value of a symbol, or the address of the frag involved.) | |
1827 | For each one, call md_apply_fix to put the fix into the frag data. | |
6efd877d | 1828 | |
fecd2382 RP |
1829 | Result is a count of how many relocation structs will be needed to |
1830 | handle the remaining fixS's that we couldn't completely handle here. | |
1831 | These will be output later by emit_relocations(). */ | |
1832 | ||
09952cd9 | 1833 | static long |
6efd877d | 1834 | fixup_segment (fixP, this_segment_type) |
09952cd9 | 1835 | register fixS *fixP; |
6efd877d | 1836 | segT this_segment_type; /* N_TYPE bits for segment. */ |
fecd2382 | 1837 | { |
f5c32424 KR |
1838 | long seg_reloc_count = 0; |
1839 | symbolS *add_symbolP; | |
1840 | symbolS *sub_symbolP; | |
d5364748 | 1841 | valueT add_number; |
f5c32424 KR |
1842 | int size; |
1843 | char *place; | |
1844 | long where; | |
1845 | char pcrel; | |
1846 | fragS *fragP; | |
1847 | segT add_symbol_segment = absolute_section; | |
1848 | ||
1849 | /* If the linker is doing the relaxing, we must not do any fixups. | |
1850 | ||
1851 | Well, strictly speaking that's not true -- we could do any that are | |
1852 | PC-relative and don't cross regions that could change size. And for the | |
1853 | i960 (the only machine for which we've got a relaxing linker right now), | |
1854 | we might be able to turn callx/callj into bal anyways in cases where we | |
1855 | know the maximum displacement. */ | |
6efd877d | 1856 | if (linkrelax) |
f5c32424 KR |
1857 | { |
1858 | for (; fixP; fixP = fixP->fx_next) | |
1859 | seg_reloc_count++; | |
1860 | TC_ADJUST_RELOC_COUNT (fixP, seg_reloc_count); | |
1861 | return seg_reloc_count; | |
1862 | } | |
6efd877d | 1863 | |
f5c32424 KR |
1864 | for (; fixP; fixP = fixP->fx_next) |
1865 | { | |
1866 | fragP = fixP->fx_frag; | |
1867 | know (fragP); | |
1868 | where = fixP->fx_where; | |
1869 | place = fragP->fr_literal + where; | |
1870 | size = fixP->fx_size; | |
1871 | add_symbolP = fixP->fx_addsy; | |
1872 | #ifdef TC_VALIDATE_FIX | |
1873 | TC_VALIDATE_FIX (fixP, this_segment_type, skip); | |
fecd2382 | 1874 | #endif |
f5c32424 KR |
1875 | sub_symbolP = fixP->fx_subsy; |
1876 | add_number = fixP->fx_offset; | |
1877 | pcrel = fixP->fx_pcrel; | |
1878 | ||
1879 | if (add_symbolP) | |
1880 | add_symbol_segment = S_GET_SEGMENT (add_symbolP); | |
1881 | ||
1882 | if (sub_symbolP) | |
1883 | { | |
1884 | if (!add_symbolP) | |
1885 | { | |
1886 | /* Its just -sym */ | |
1887 | if (S_GET_SEGMENT (sub_symbolP) == absolute_section) | |
6efd877d | 1888 | add_number -= S_GET_VALUE (sub_symbolP); |
f5c32424 KR |
1889 | else if (pcrel |
1890 | && S_GET_SEGMENT (sub_symbolP) == this_segment_type) | |
1891 | { | |
1892 | /* Should try converting to a constant. */ | |
1893 | goto bad_sub_reloc; | |
1894 | } | |
1895 | else | |
1896 | bad_sub_reloc: | |
1897 | as_bad ("Negative of non-absolute symbol %s", | |
1898 | S_GET_NAME (sub_symbolP)); | |
1899 | } | |
1900 | else if ((S_GET_SEGMENT (sub_symbolP) == add_symbol_segment) | |
1901 | && (SEG_NORMAL (add_symbol_segment) | |
1902 | || (add_symbol_segment == absolute_section))) | |
1903 | { | |
1904 | /* Difference of 2 symbols from same segment. | |
1905 | Can't make difference of 2 undefineds: 'value' means | |
1906 | something different for N_UNDF. */ | |
fecd2382 | 1907 | #ifdef TC_I960 |
f5c32424 KR |
1908 | /* Makes no sense to use the difference of 2 arbitrary symbols |
1909 | as the target of a call instruction. */ | |
1910 | if (fixP->fx_tcbit) | |
1911 | as_bad ("callj to difference of 2 symbols"); | |
6efd877d | 1912 | #endif /* TC_I960 */ |
f5c32424 KR |
1913 | add_number += S_GET_VALUE (add_symbolP) - |
1914 | S_GET_VALUE (sub_symbolP); | |
6efd877d | 1915 | |
f5c32424 | 1916 | add_symbolP = NULL; |
335d35c8 | 1917 | |
f5c32424 KR |
1918 | /* Let the target machine make the final determination |
1919 | as to whether or not a relocation will be needed to | |
1920 | handle this fixup. */ | |
1921 | if (!TC_FORCE_RELOCATION (fixP)) | |
98c6bbbe KR |
1922 | { |
1923 | fixP->fx_addsy = NULL; | |
1924 | } | |
f5c32424 KR |
1925 | } |
1926 | else | |
1927 | { | |
1928 | /* Different segments in subtraction. */ | |
1929 | know (!(S_IS_EXTERNAL (sub_symbolP) | |
1930 | && (S_GET_SEGMENT (sub_symbolP) == absolute_section))); | |
1931 | ||
1932 | if ((S_GET_SEGMENT (sub_symbolP) == absolute_section)) | |
1933 | add_number -= S_GET_VALUE (sub_symbolP); | |
6efd877d | 1934 | |
80aab579 | 1935 | #ifdef DIFF_EXPR_OK |
f5c32424 KR |
1936 | else if (S_GET_SEGMENT (sub_symbolP) == this_segment_type |
1937 | #if 0 /* Do this even if it's already described as pc-relative. For example, | |
1938 | on the m68k, an operand of "pc@(foo-.-2)" should address "foo" in a | |
1939 | pc-relative mode. */ | |
1940 | && pcrel | |
0f894895 | 1941 | #endif |
f5c32424 KR |
1942 | ) |
1943 | { | |
1944 | /* Make it pc-relative. */ | |
1945 | add_number += (md_pcrel_from (fixP) | |
1946 | - S_GET_VALUE (sub_symbolP)); | |
1947 | pcrel = 1; | |
1948 | fixP->fx_pcrel = 1; | |
1949 | sub_symbolP = 0; | |
1950 | fixP->fx_subsy = 0; | |
1951 | } | |
98c6bbbe KR |
1952 | #endif |
1953 | #ifdef BFD_ASSEMBLER | |
1954 | else if (fixP->fx_r_type == BFD_RELOC_GPREL32 | |
1955 | || fixP->fx_r_type == BFD_RELOC_GPREL16) | |
1956 | { | |
1957 | /* Leave it alone. */ | |
1958 | } | |
80aab579 | 1959 | #endif |
f5c32424 KR |
1960 | else |
1961 | { | |
1962 | char buf[50]; | |
1963 | sprint_value (buf, fragP->fr_address + where); | |
1964 | as_bad ("Can't emit reloc {- %s-seg symbol \"%s\"} @ file address %s.", | |
1965 | segment_name (S_GET_SEGMENT (sub_symbolP)), | |
1966 | S_GET_NAME (sub_symbolP), buf); | |
1967 | } | |
1968 | } | |
1969 | } | |
6efd877d | 1970 | |
f5c32424 KR |
1971 | if (add_symbolP) |
1972 | { | |
1973 | if (add_symbol_segment == this_segment_type && pcrel) | |
1974 | { | |
1975 | /* | |
1976 | * This fixup was made when the symbol's segment was | |
1977 | * SEG_UNKNOWN, but it is now in the local segment. | |
1978 | * So we know how to do the address without relocation. | |
1979 | */ | |
fecd2382 | 1980 | #ifdef TC_I960 |
f5c32424 KR |
1981 | /* reloc_callj() may replace a 'call' with a 'calls' or a |
1982 | 'bal', in which cases it modifies *fixP as appropriate. | |
1983 | In the case of a 'calls', no further work is required, | |
1984 | and *fixP has been set up to make the rest of the code | |
1985 | below a no-op. */ | |
1986 | reloc_callj (fixP); | |
fecd2382 | 1987 | #endif /* TC_I960 */ |
6efd877d | 1988 | |
f5c32424 KR |
1989 | add_number += S_GET_VALUE (add_symbolP); |
1990 | add_number -= md_pcrel_from (fixP); | |
1991 | pcrel = 0; /* Lie. Don't want further pcrel processing. */ | |
1992 | ||
1993 | /* Let the target machine make the final determination | |
1994 | as to whether or not a relocation will be needed to | |
1995 | handle this fixup. */ | |
1996 | if (!TC_FORCE_RELOCATION (fixP)) | |
98c6bbbe KR |
1997 | { |
1998 | fixP->fx_pcrel = 0; | |
1999 | fixP->fx_addsy = NULL; | |
2000 | } | |
f5c32424 KR |
2001 | } |
2002 | else | |
2003 | { | |
2004 | if (add_symbol_segment == absolute_section) | |
2005 | { | |
fecd2382 | 2006 | #ifdef TC_I960 |
f5c32424 KR |
2007 | /* See comment about reloc_callj() above. */ |
2008 | reloc_callj (fixP); | |
fecd2382 | 2009 | #endif /* TC_I960 */ |
f5c32424 KR |
2010 | add_number += S_GET_VALUE (add_symbolP); |
2011 | ||
2012 | /* Let the target machine make the final determination | |
2013 | as to whether or not a relocation will be needed to | |
2014 | handle this fixup. */ | |
2015 | if (!TC_FORCE_RELOCATION (fixP)) | |
e67a0640 KR |
2016 | { |
2017 | fixP->fx_addsy = NULL; | |
2018 | add_symbolP = NULL; | |
2019 | } | |
f5c32424 KR |
2020 | } |
2021 | else if (add_symbol_segment == undefined_section | |
43ca9aa6 | 2022 | #ifdef BFD_ASSEMBLER |
f5c32424 | 2023 | || bfd_is_com_section (add_symbol_segment) |
43ca9aa6 | 2024 | #endif |
f5c32424 KR |
2025 | ) |
2026 | { | |
fecd2382 | 2027 | #ifdef TC_I960 |
f5c32424 KR |
2028 | if ((int) fixP->fx_bit_fixP == 13) |
2029 | { | |
2030 | /* This is a COBR instruction. They have only a | |
2031 | * 13-bit displacement and are only to be used | |
2032 | * for local branches: flag as error, don't generate | |
2033 | * relocation. | |
2034 | */ | |
2035 | as_bad ("can't use COBR format with external label"); | |
98c6bbbe KR |
2036 | fixP->fx_addsy = NULL; |
2037 | fixP->fx_done = 1; | |
f5c32424 KR |
2038 | continue; |
2039 | } /* COBR */ | |
fecd2382 | 2040 | #endif /* TC_I960 */ |
f5c32424 | 2041 | |
fecd2382 | 2042 | #ifdef OBJ_COFF |
c593cf41 | 2043 | #ifdef TE_I386AIX |
f5c32424 KR |
2044 | if (S_IS_COMMON (add_symbolP)) |
2045 | add_number += S_GET_VALUE (add_symbolP); | |
c593cf41 | 2046 | #endif /* TE_I386AIX */ |
fecd2382 | 2047 | #endif /* OBJ_COFF */ |
f5c32424 KR |
2048 | ++seg_reloc_count; |
2049 | } | |
2050 | else | |
2051 | { | |
2052 | seg_reloc_count++; | |
2053 | add_number += S_GET_VALUE (add_symbolP); | |
2054 | } | |
2055 | } | |
2056 | } | |
6efd877d | 2057 | |
f5c32424 KR |
2058 | if (pcrel) |
2059 | { | |
2060 | add_number -= md_pcrel_from (fixP); | |
2061 | if (add_symbolP == 0) | |
2062 | { | |
2063 | fixP->fx_addsy = &abs_symbol; | |
2064 | ++seg_reloc_count; | |
98c6bbbe KR |
2065 | } |
2066 | } | |
6efd877d | 2067 | |
f5c32424 KR |
2068 | if (!fixP->fx_bit_fixP && size > 0) |
2069 | { | |
2070 | valueT mask = 0; | |
2071 | /* set all bits to one */ | |
2072 | mask--; | |
98c6bbbe KR |
2073 | /* Technically, combining these produces an undefined result |
2074 | if size is sizeof (valueT), though I think these two | |
2075 | half-way operations should both be defined. And the | |
2076 | compiler should be able to combine them if it's valid on | |
2077 | the host architecture. */ | |
f5c32424 KR |
2078 | mask <<= size * 4; |
2079 | mask <<= size * 4; | |
2080 | if ((add_number & mask) != 0 | |
2081 | && (add_number & mask) != mask) | |
2082 | { | |
2083 | char buf[50], buf2[50]; | |
2084 | sprint_value (buf, fragP->fr_address + where); | |
2085 | if (add_number > 1000) | |
2086 | sprint_value (buf2, add_number); | |
2087 | else | |
2088 | sprintf (buf2, "%ld", (long) add_number); | |
84fa9814 | 2089 | as_bad_where (fixP->fx_file, fixP->fx_line, |
f5c32424 KR |
2090 | "Value of %s too large for field of %d bytes at %s", |
2091 | buf2, size, buf); | |
2092 | } /* generic error checking */ | |
2093 | #ifdef WARN_SIGNED_OVERFLOW_WORD | |
2094 | /* Warn if a .word value is too large when treated as a signed | |
2095 | number. We already know it is not too negative. This is to | |
2096 | catch over-large switches generated by gcc on the 68k. */ | |
2097 | if (!flagseen['J'] | |
2098 | && size == 2 | |
2099 | && add_number > 0x7fff) | |
2100 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
2101 | "Signed .word overflow; switch may be too large; %ld at 0x%lx", | |
2102 | (long) add_number, | |
2103 | (unsigned long) (fragP->fr_address + where)); | |
6efd877d | 2104 | #endif |
f5c32424 | 2105 | } /* not a bit fix */ |
6efd877d | 2106 | |
98c6bbbe KR |
2107 | if (!fixP->fx_done) |
2108 | { | |
43ca9aa6 | 2109 | #ifdef BFD_ASSEMBLER |
98c6bbbe | 2110 | md_apply_fix (fixP, &add_number); |
43ca9aa6 | 2111 | #else |
98c6bbbe KR |
2112 | md_apply_fix (fixP, add_number); |
2113 | #endif | |
2114 | ||
2115 | #ifndef TC_HANDLES_FX_DONE | |
2116 | /* If the tc-* files haven't been converted, assume it's handling | |
2117 | it the old way, where a null fx_addsy means that the fix has | |
2118 | been applied completely, and no further work is needed. */ | |
2119 | if (fixP->fx_addsy == 0 && fixP->fx_pcrel == 0) | |
2120 | fixP->fx_done = 1; | |
43ca9aa6 | 2121 | #endif |
98c6bbbe KR |
2122 | } |
2123 | #ifdef TC_VALIDATE_FIX | |
f5c32424 | 2124 | skip: |
98c6bbbe | 2125 | #endif |
f5c32424 KR |
2126 | ; |
2127 | } /* For each fixS in this segment. */ | |
6efd877d | 2128 | |
f5c32424 KR |
2129 | TC_ADJUST_RELOC_COUNT (fixP, seg_reloc_count); |
2130 | return seg_reloc_count; | |
2131 | } | |
6efd877d | 2132 | |
f5c32424 | 2133 | #endif /* defined (BFD_ASSEMBLER) || !defined (BFD) */ |
6efd877d | 2134 | |
f5c32424 KR |
2135 | void |
2136 | number_to_chars_bigendian (buf, val, n) | |
2137 | char *buf; | |
2138 | valueT val; | |
2139 | int n; | |
2140 | { | |
2141 | if (n > sizeof (val)|| n <= 0) | |
2142 | abort (); | |
2143 | while (n--) | |
2144 | { | |
2145 | buf[n] = val & 0xff; | |
2146 | val >>= 8; | |
2147 | } | |
d5364748 | 2148 | } |
fecd2382 | 2149 | |
f5c32424 KR |
2150 | void |
2151 | number_to_chars_littleendian (buf, val, n) | |
2152 | char *buf; | |
2153 | valueT val; | |
2154 | int n; | |
2155 | { | |
2156 | if (n > sizeof (val) || n <= 0) | |
2157 | abort (); | |
2158 | while (n--) | |
2159 | { | |
2160 | *buf++ = val & 0xff; | |
2161 | val >>= 8; | |
2162 | } | |
2163 | } | |
80aab579 | 2164 | |
fecd2382 | 2165 | /* end of write.c */ |