Commit | Line | Data |
---|---|---|
252b5132 | 1 | /* write.c - emit .o file |
f7e42eb4 NC |
2 | Copyright 1986, 1987, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, |
3 | 1998, 1999, 2000, 2001 | |
252b5132 RH |
4 | Free Software Foundation, Inc. |
5 | ||
6 | This file is part of GAS, the GNU Assembler. | |
7 | ||
8 | GAS is free software; you can redistribute it and/or modify | |
9 | it under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 2, or (at your option) | |
11 | any later version. | |
12 | ||
13 | GAS is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with GAS; see the file COPYING. If not, write to the Free | |
20 | Software Foundation, 59 Temple Place - Suite 330, Boston, MA | |
21 | 02111-1307, USA. */ | |
22 | ||
efaf0ba4 | 23 | /* This thing should be set up to do byteordering correctly. But... */ |
252b5132 RH |
24 | |
25 | #include "as.h" | |
26 | #include "subsegs.h" | |
27 | #include "obstack.h" | |
28 | #include "output-file.h" | |
220e750f | 29 | #include "dwarf2dbg.h" |
252b5132 RH |
30 | |
31 | /* This looks like a good idea. Let's try turning it on always, for now. */ | |
32 | #undef BFD_FAST_SECTION_FILL | |
33 | #define BFD_FAST_SECTION_FILL | |
34 | ||
252b5132 RH |
35 | #ifndef TC_ADJUST_RELOC_COUNT |
36 | #define TC_ADJUST_RELOC_COUNT(FIXP,COUNT) | |
37 | #endif | |
38 | ||
39 | #ifndef TC_FORCE_RELOCATION | |
40 | #define TC_FORCE_RELOCATION(FIXP) 0 | |
41 | #endif | |
42 | ||
43 | #ifndef TC_FORCE_RELOCATION_SECTION | |
44 | #define TC_FORCE_RELOCATION_SECTION(FIXP,SEG) TC_FORCE_RELOCATION(FIXP) | |
45 | #endif | |
46 | ||
58a77e41 EC |
47 | #ifndef TC_LINKRELAX_FIXUP |
48 | #define TC_LINKRELAX_FIXUP(SEG) 1 | |
49 | #endif | |
50 | ||
8f36cd18 AO |
51 | #ifndef TC_FIX_ADJUSTABLE |
52 | #define TC_FIX_ADJUSTABLE(fix) 1 | |
53 | #endif | |
ef99799a | 54 | |
87548816 NC |
55 | #ifndef TC_FINALIZE_SYMS_BEFORE_SIZE_SEG |
56 | #define TC_FINALIZE_SYMS_BEFORE_SIZE_SEG 1 | |
57 | #endif | |
58 | ||
252b5132 RH |
59 | #ifndef MD_PCREL_FROM_SECTION |
60 | #define MD_PCREL_FROM_SECTION(FIXP, SEC) md_pcrel_from(FIXP) | |
61 | #endif | |
62 | ||
63 | #ifndef WORKING_DOT_WORD | |
64 | extern CONST int md_short_jump_size; | |
65 | extern CONST int md_long_jump_size; | |
66 | #endif | |
67 | ||
6386f3a7 AM |
68 | /* Used to control final evaluation of expressions. */ |
69 | int finalize_syms = 0; | |
e46d99eb | 70 | |
252b5132 RH |
71 | int symbol_table_frozen; |
72 | void print_fixup PARAMS ((fixS *)); | |
73 | ||
74 | #ifdef BFD_ASSEMBLER | |
75 | static void renumber_sections PARAMS ((bfd *, asection *, PTR)); | |
76 | ||
77 | /* We generally attach relocs to frag chains. However, after we have | |
78 | chained these all together into a segment, any relocs we add after | |
79 | that must be attached to a segment. This will include relocs added | |
80 | in md_estimate_size_for_relax, for example. */ | |
81 | static int frags_chained = 0; | |
82 | #endif | |
83 | ||
84 | #ifndef BFD_ASSEMBLER | |
85 | ||
86 | #ifndef MANY_SEGMENTS | |
87 | struct frag *text_frag_root; | |
88 | struct frag *data_frag_root; | |
89 | struct frag *bss_frag_root; | |
90 | ||
efaf0ba4 NC |
91 | struct frag *text_last_frag; /* Last frag in segment. */ |
92 | struct frag *data_last_frag; /* Last frag in segment. */ | |
93 | static struct frag *bss_last_frag; /* Last frag in segment. */ | |
252b5132 RH |
94 | #endif |
95 | ||
96 | #ifndef BFD | |
97 | static object_headers headers; | |
98 | #endif | |
99 | ||
100 | long string_byte_count; | |
efaf0ba4 | 101 | char *next_object_file_charP; /* Tracks object file bytes. */ |
252b5132 RH |
102 | |
103 | #ifndef OBJ_VMS | |
104 | int magic_number_for_object_file = DEFAULT_MAGIC_NUMBER_FOR_OBJECT_FILE; | |
105 | #endif | |
106 | ||
efaf0ba4 | 107 | #endif /* BFD_ASSEMBLER */ |
252b5132 RH |
108 | |
109 | static int n_fixups; | |
110 | ||
111 | #ifdef BFD_ASSEMBLER | |
112 | static fixS *fix_new_internal PARAMS ((fragS *, int where, int size, | |
113 | symbolS *add, symbolS *sub, | |
114 | offsetT offset, int pcrel, | |
115 | bfd_reloc_code_real_type r_type)); | |
116 | #else | |
117 | static fixS *fix_new_internal PARAMS ((fragS *, int where, int size, | |
118 | symbolS *add, symbolS *sub, | |
119 | offsetT offset, int pcrel, | |
120 | int r_type)); | |
121 | #endif | |
122 | #if defined (BFD_ASSEMBLER) || (!defined (BFD) && !defined (OBJ_VMS)) | |
123 | static long fixup_segment PARAMS ((fixS * fixP, segT this_segment_type)); | |
124 | #endif | |
125 | static relax_addressT relax_align PARAMS ((relax_addressT addr, int align)); | |
126 | #if defined (BFD_ASSEMBLER) || ! defined (BFD) | |
127 | static fragS *chain_frchains_together_1 PARAMS ((segT, struct frchain *)); | |
128 | #endif | |
129 | #ifdef BFD_ASSEMBLER | |
130 | static void chain_frchains_together PARAMS ((bfd *, segT, PTR)); | |
131 | static void cvt_frag_to_fill PARAMS ((segT, fragS *)); | |
252b5132 RH |
132 | static void adjust_reloc_syms PARAMS ((bfd *, asection *, PTR)); |
133 | static void write_relocs PARAMS ((bfd *, asection *, PTR)); | |
134 | static void write_contents PARAMS ((bfd *, asection *, PTR)); | |
135 | static void set_symtab PARAMS ((void)); | |
136 | #endif | |
137 | #if defined (BFD_ASSEMBLER) || (! defined (BFD) && ! defined (OBJ_AOUT)) | |
138 | static void merge_data_into_text PARAMS ((void)); | |
139 | #endif | |
140 | #if ! defined (BFD_ASSEMBLER) && ! defined (BFD) | |
141 | static void cvt_frag_to_fill PARAMS ((object_headers *, segT, fragS *)); | |
142 | static void remove_subsegs PARAMS ((frchainS *, int, fragS **, fragS **)); | |
143 | static void relax_and_size_all_segments PARAMS ((void)); | |
144 | #endif | |
6aa4f516 | 145 | #if defined (BFD_ASSEMBLER) && defined (OBJ_COFF) && defined (TE_GO32) |
dbddefbf NC |
146 | static void set_segment_vma PARAMS ((bfd *, asection *, PTR)); |
147 | #endif | |
252b5132 | 148 | |
efaf0ba4 NC |
149 | /* Create a fixS in obstack 'notes'. */ |
150 | ||
252b5132 RH |
151 | static fixS * |
152 | fix_new_internal (frag, where, size, add_symbol, sub_symbol, offset, pcrel, | |
153 | r_type) | |
efaf0ba4 NC |
154 | fragS *frag; /* Which frag? */ |
155 | int where; /* Where in that frag? */ | |
156 | int size; /* 1, 2, or 4 usually. */ | |
157 | symbolS *add_symbol; /* X_add_symbol. */ | |
158 | symbolS *sub_symbol; /* X_op_symbol. */ | |
159 | offsetT offset; /* X_add_number. */ | |
160 | int pcrel; /* TRUE if PC-relative relocation. */ | |
252b5132 | 161 | #ifdef BFD_ASSEMBLER |
efaf0ba4 | 162 | bfd_reloc_code_real_type r_type; /* Relocation type. */ |
252b5132 | 163 | #else |
efaf0ba4 | 164 | int r_type; /* Relocation type. */ |
252b5132 RH |
165 | #endif |
166 | { | |
167 | fixS *fixP; | |
168 | ||
169 | n_fixups++; | |
170 | ||
171 | fixP = (fixS *) obstack_alloc (¬es, sizeof (fixS)); | |
172 | ||
173 | fixP->fx_frag = frag; | |
174 | fixP->fx_where = where; | |
175 | fixP->fx_size = size; | |
176 | /* We've made fx_size a narrow field; check that it's wide enough. */ | |
177 | if (fixP->fx_size != size) | |
178 | { | |
179 | as_bad (_("field fx_size too small to hold %d"), size); | |
180 | abort (); | |
181 | } | |
182 | fixP->fx_addsy = add_symbol; | |
183 | fixP->fx_subsy = sub_symbol; | |
184 | fixP->fx_offset = offset; | |
185 | fixP->fx_pcrel = pcrel; | |
186 | fixP->fx_plt = 0; | |
187 | #if defined(NEED_FX_R_TYPE) || defined (BFD_ASSEMBLER) | |
188 | fixP->fx_r_type = r_type; | |
189 | #endif | |
190 | fixP->fx_im_disp = 0; | |
191 | fixP->fx_pcrel_adjust = 0; | |
192 | fixP->fx_bit_fixP = 0; | |
193 | fixP->fx_addnumber = 0; | |
194 | fixP->fx_tcbit = 0; | |
195 | fixP->fx_done = 0; | |
196 | fixP->fx_no_overflow = 0; | |
197 | fixP->fx_signed = 0; | |
198 | ||
199 | #ifdef USING_CGEN | |
200 | fixP->fx_cgen.insn = NULL; | |
201 | fixP->fx_cgen.opinfo = 0; | |
202 | #endif | |
203 | ||
204 | #ifdef TC_FIX_TYPE | |
efaf0ba4 | 205 | TC_INIT_FIX_DATA (fixP); |
252b5132 RH |
206 | #endif |
207 | ||
208 | as_where (&fixP->fx_file, &fixP->fx_line); | |
209 | ||
210 | /* Usually, we want relocs sorted numerically, but while | |
211 | comparing to older versions of gas that have relocs | |
212 | reverse sorted, it is convenient to have this compile | |
efaf0ba4 | 213 | time option. xoxorich. */ |
252b5132 RH |
214 | { |
215 | ||
216 | #ifdef BFD_ASSEMBLER | |
217 | fixS **seg_fix_rootP = (frags_chained | |
218 | ? &seg_info (now_seg)->fix_root | |
219 | : &frchain_now->fix_root); | |
220 | fixS **seg_fix_tailP = (frags_chained | |
221 | ? &seg_info (now_seg)->fix_tail | |
222 | : &frchain_now->fix_tail); | |
223 | #endif | |
224 | ||
225 | #ifdef REVERSE_SORT_RELOCS | |
226 | ||
227 | fixP->fx_next = *seg_fix_rootP; | |
228 | *seg_fix_rootP = fixP; | |
229 | ||
efaf0ba4 | 230 | #else /* REVERSE_SORT_RELOCS */ |
252b5132 RH |
231 | |
232 | fixP->fx_next = NULL; | |
233 | ||
234 | if (*seg_fix_tailP) | |
235 | (*seg_fix_tailP)->fx_next = fixP; | |
236 | else | |
237 | *seg_fix_rootP = fixP; | |
238 | *seg_fix_tailP = fixP; | |
239 | ||
efaf0ba4 | 240 | #endif /* REVERSE_SORT_RELOCS */ |
252b5132 RH |
241 | } |
242 | ||
243 | return fixP; | |
244 | } | |
245 | ||
246 | /* Create a fixup relative to a symbol (plus a constant). */ | |
247 | ||
248 | fixS * | |
249 | fix_new (frag, where, size, add_symbol, offset, pcrel, r_type) | |
efaf0ba4 NC |
250 | fragS *frag; /* Which frag? */ |
251 | int where; /* Where in that frag? */ | |
252 | int size; /* 1, 2, or 4 usually. */ | |
253 | symbolS *add_symbol; /* X_add_symbol. */ | |
254 | offsetT offset; /* X_add_number. */ | |
255 | int pcrel; /* TRUE if PC-relative relocation. */ | |
252b5132 | 256 | #ifdef BFD_ASSEMBLER |
efaf0ba4 | 257 | bfd_reloc_code_real_type r_type; /* Relocation type. */ |
252b5132 | 258 | #else |
efaf0ba4 | 259 | int r_type; /* Relocation type. */ |
252b5132 RH |
260 | #endif |
261 | { | |
262 | return fix_new_internal (frag, where, size, add_symbol, | |
263 | (symbolS *) NULL, offset, pcrel, r_type); | |
264 | } | |
265 | ||
266 | /* Create a fixup for an expression. Currently we only support fixups | |
267 | for difference expressions. That is itself more than most object | |
268 | file formats support anyhow. */ | |
269 | ||
270 | fixS * | |
271 | fix_new_exp (frag, where, size, exp, pcrel, r_type) | |
efaf0ba4 NC |
272 | fragS *frag; /* Which frag? */ |
273 | int where; /* Where in that frag? */ | |
274 | int size; /* 1, 2, or 4 usually. */ | |
252b5132 | 275 | expressionS *exp; /* Expression. */ |
efaf0ba4 | 276 | int pcrel; /* TRUE if PC-relative relocation. */ |
252b5132 | 277 | #ifdef BFD_ASSEMBLER |
efaf0ba4 | 278 | bfd_reloc_code_real_type r_type; /* Relocation type. */ |
252b5132 | 279 | #else |
efaf0ba4 | 280 | int r_type; /* Relocation type. */ |
252b5132 RH |
281 | #endif |
282 | { | |
283 | symbolS *add = NULL; | |
284 | symbolS *sub = NULL; | |
285 | offsetT off = 0; | |
286 | ||
287 | switch (exp->X_op) | |
288 | { | |
289 | case O_absent: | |
290 | break; | |
291 | ||
37006e43 NC |
292 | case O_register: |
293 | as_bad (_("register value used as expression")); | |
294 | break; | |
295 | ||
252b5132 RH |
296 | case O_add: |
297 | /* This comes up when _GLOBAL_OFFSET_TABLE_+(.-L0) is read, if | |
298 | the difference expression cannot immediately be reduced. */ | |
299 | { | |
300 | symbolS *stmp = make_expr_symbol (exp); | |
58a77e41 | 301 | |
252b5132 RH |
302 | exp->X_op = O_symbol; |
303 | exp->X_op_symbol = 0; | |
304 | exp->X_add_symbol = stmp; | |
305 | exp->X_add_number = 0; | |
58a77e41 | 306 | |
252b5132 RH |
307 | return fix_new_exp (frag, where, size, exp, pcrel, r_type); |
308 | } | |
309 | ||
310 | case O_symbol_rva: | |
311 | add = exp->X_add_symbol; | |
312 | off = exp->X_add_number; | |
313 | ||
314 | #if defined(BFD_ASSEMBLER) | |
315 | r_type = BFD_RELOC_RVA; | |
316 | #else | |
317 | #if defined(TC_RVA_RELOC) | |
318 | r_type = TC_RVA_RELOC; | |
319 | #else | |
efaf0ba4 | 320 | as_fatal (_("rva not supported")); |
252b5132 RH |
321 | #endif |
322 | #endif | |
323 | break; | |
324 | ||
325 | case O_uminus: | |
326 | sub = exp->X_add_symbol; | |
327 | off = exp->X_add_number; | |
328 | break; | |
329 | ||
330 | case O_subtract: | |
331 | sub = exp->X_op_symbol; | |
332 | /* Fall through. */ | |
333 | case O_symbol: | |
334 | add = exp->X_add_symbol; | |
efaf0ba4 | 335 | /* Fall through. */ |
252b5132 RH |
336 | case O_constant: |
337 | off = exp->X_add_number; | |
338 | break; | |
339 | ||
340 | default: | |
341 | add = make_expr_symbol (exp); | |
342 | break; | |
343 | } | |
344 | ||
efaf0ba4 | 345 | return fix_new_internal (frag, where, size, add, sub, off, pcrel, r_type); |
252b5132 RH |
346 | } |
347 | ||
348 | /* Append a string onto another string, bumping the pointer along. */ | |
349 | void | |
350 | append (charPP, fromP, length) | |
351 | char **charPP; | |
352 | char *fromP; | |
353 | unsigned long length; | |
354 | { | |
efaf0ba4 | 355 | /* Don't trust memcpy() of 0 chars. */ |
252b5132 RH |
356 | if (length == 0) |
357 | return; | |
358 | ||
359 | memcpy (*charPP, fromP, length); | |
360 | *charPP += length; | |
361 | } | |
362 | ||
363 | #ifndef BFD_ASSEMBLER | |
364 | int section_alignment[SEG_MAXIMUM_ORDINAL]; | |
365 | #endif | |
366 | ||
efaf0ba4 NC |
367 | /* This routine records the largest alignment seen for each segment. |
368 | If the beginning of the segment is aligned on the worst-case | |
369 | boundary, all of the other alignments within it will work. At | |
370 | least one object format really uses this info. */ | |
371 | ||
252b5132 RH |
372 | void |
373 | record_alignment (seg, align) | |
efaf0ba4 | 374 | /* Segment to which alignment pertains. */ |
252b5132 RH |
375 | segT seg; |
376 | /* Alignment, as a power of 2 (e.g., 1 => 2-byte boundary, 2 => 4-byte | |
377 | boundary, etc.) */ | |
378 | int align; | |
379 | { | |
380 | if (seg == absolute_section) | |
381 | return; | |
382 | #ifdef BFD_ASSEMBLER | |
383 | if ((unsigned int) align > bfd_get_section_alignment (stdoutput, seg)) | |
384 | bfd_set_section_alignment (stdoutput, seg, align); | |
385 | #else | |
386 | if (align > section_alignment[(int) seg]) | |
387 | section_alignment[(int) seg] = align; | |
388 | #endif | |
389 | } | |
390 | ||
0a9ef439 RH |
391 | int |
392 | get_recorded_alignment (seg) | |
393 | segT seg; | |
394 | { | |
395 | if (seg == absolute_section) | |
396 | return 0; | |
397 | #ifdef BFD_ASSEMBLER | |
398 | return bfd_get_section_alignment (stdoutput, seg); | |
399 | #else | |
400 | return section_alignment[(int) seg]; | |
401 | #endif | |
402 | } | |
403 | ||
252b5132 RH |
404 | #ifdef BFD_ASSEMBLER |
405 | ||
406 | /* Reset the section indices after removing the gas created sections. */ | |
407 | ||
408 | static void | |
409 | renumber_sections (abfd, sec, countparg) | |
ab9da554 | 410 | bfd *abfd ATTRIBUTE_UNUSED; |
252b5132 RH |
411 | asection *sec; |
412 | PTR countparg; | |
413 | { | |
414 | int *countp = (int *) countparg; | |
415 | ||
416 | sec->index = *countp; | |
417 | ++*countp; | |
418 | } | |
419 | ||
efaf0ba4 | 420 | #endif /* defined (BFD_ASSEMBLER) */ |
252b5132 RH |
421 | |
422 | #if defined (BFD_ASSEMBLER) || ! defined (BFD) | |
423 | ||
424 | static fragS * | |
425 | chain_frchains_together_1 (section, frchp) | |
426 | segT section; | |
427 | struct frchain *frchp; | |
428 | { | |
429 | fragS dummy, *prev_frag = &dummy; | |
430 | #ifdef BFD_ASSEMBLER | |
431 | fixS fix_dummy, *prev_fix = &fix_dummy; | |
432 | #endif | |
433 | ||
434 | for (; frchp && frchp->frch_seg == section; frchp = frchp->frch_next) | |
435 | { | |
436 | prev_frag->fr_next = frchp->frch_root; | |
437 | prev_frag = frchp->frch_last; | |
438 | assert (prev_frag->fr_type != 0); | |
439 | #ifdef BFD_ASSEMBLER | |
440 | if (frchp->fix_root != (fixS *) NULL) | |
441 | { | |
442 | if (seg_info (section)->fix_root == (fixS *) NULL) | |
443 | seg_info (section)->fix_root = frchp->fix_root; | |
444 | prev_fix->fx_next = frchp->fix_root; | |
445 | seg_info (section)->fix_tail = frchp->fix_tail; | |
446 | prev_fix = frchp->fix_tail; | |
447 | } | |
448 | #endif | |
449 | } | |
450 | assert (prev_frag->fr_type != 0); | |
451 | prev_frag->fr_next = 0; | |
452 | return prev_frag; | |
453 | } | |
454 | ||
455 | #endif | |
456 | ||
457 | #ifdef BFD_ASSEMBLER | |
458 | ||
459 | static void | |
460 | chain_frchains_together (abfd, section, xxx) | |
ab9da554 | 461 | bfd *abfd ATTRIBUTE_UNUSED; |
252b5132 | 462 | segT section; |
ab9da554 | 463 | PTR xxx ATTRIBUTE_UNUSED; |
252b5132 RH |
464 | { |
465 | segment_info_type *info; | |
466 | ||
467 | /* BFD may have introduced its own sections without using | |
468 | subseg_new, so it is possible that seg_info is NULL. */ | |
469 | info = seg_info (section); | |
470 | if (info != (segment_info_type *) NULL) | |
efaf0ba4 NC |
471 | info->frchainP->frch_last |
472 | = chain_frchains_together_1 (section, info->frchainP); | |
252b5132 RH |
473 | |
474 | /* Now that we've chained the frags together, we must add new fixups | |
475 | to the segment, not to the frag chain. */ | |
476 | frags_chained = 1; | |
477 | } | |
478 | ||
479 | #endif | |
480 | ||
481 | #if !defined (BFD) && !defined (BFD_ASSEMBLER) | |
482 | ||
483 | static void | |
484 | remove_subsegs (head, seg, root, last) | |
485 | frchainS *head; | |
486 | int seg; | |
487 | fragS **root; | |
488 | fragS **last; | |
489 | { | |
490 | *root = head->frch_root; | |
491 | *last = chain_frchains_together_1 (seg, head); | |
492 | } | |
493 | ||
efaf0ba4 | 494 | #endif /* BFD */ |
252b5132 RH |
495 | |
496 | #if defined (BFD_ASSEMBLER) || !defined (BFD) | |
497 | ||
498 | #ifdef BFD_ASSEMBLER | |
499 | static void | |
500 | cvt_frag_to_fill (sec, fragP) | |
efaf0ba4 | 501 | segT sec ATTRIBUTE_UNUSED; |
252b5132 RH |
502 | fragS *fragP; |
503 | #else | |
504 | static void | |
505 | cvt_frag_to_fill (headersP, sec, fragP) | |
506 | object_headers *headersP; | |
507 | segT sec; | |
508 | fragS *fragP; | |
509 | #endif | |
510 | { | |
511 | switch (fragP->fr_type) | |
512 | { | |
513 | case rs_align: | |
514 | case rs_align_code: | |
0a9ef439 | 515 | case rs_align_test: |
252b5132 RH |
516 | case rs_org: |
517 | case rs_space: | |
518 | #ifdef HANDLE_ALIGN | |
519 | HANDLE_ALIGN (fragP); | |
520 | #endif | |
521 | know (fragP->fr_next != NULL); | |
522 | fragP->fr_offset = (fragP->fr_next->fr_address | |
523 | - fragP->fr_address | |
524 | - fragP->fr_fix) / fragP->fr_var; | |
525 | if (fragP->fr_offset < 0) | |
526 | { | |
14ad458a ILT |
527 | as_bad_where (fragP->fr_file, fragP->fr_line, |
528 | _("attempt to .org/.space backwards? (%ld)"), | |
529 | (long) fragP->fr_offset); | |
252b5132 RH |
530 | } |
531 | fragP->fr_type = rs_fill; | |
532 | break; | |
533 | ||
534 | case rs_fill: | |
535 | break; | |
536 | ||
537 | case rs_leb128: | |
538 | { | |
539 | valueT value = S_GET_VALUE (fragP->fr_symbol); | |
540 | int size; | |
541 | ||
542 | size = output_leb128 (fragP->fr_literal + fragP->fr_fix, value, | |
543 | fragP->fr_subtype); | |
544 | ||
545 | fragP->fr_fix += size; | |
546 | fragP->fr_type = rs_fill; | |
547 | fragP->fr_var = 0; | |
548 | fragP->fr_offset = 0; | |
549 | fragP->fr_symbol = NULL; | |
550 | } | |
551 | break; | |
552 | ||
553 | case rs_cfa: | |
554 | eh_frame_convert_frag (fragP); | |
555 | break; | |
556 | ||
220e750f RH |
557 | case rs_dwarf2dbg: |
558 | dwarf2dbg_convert_frag (fragP); | |
559 | break; | |
560 | ||
252b5132 RH |
561 | case rs_machine_dependent: |
562 | #ifdef BFD_ASSEMBLER | |
563 | md_convert_frag (stdoutput, sec, fragP); | |
564 | #else | |
565 | md_convert_frag (headersP, sec, fragP); | |
566 | #endif | |
567 | ||
568 | assert (fragP->fr_next == NULL | |
569 | || ((offsetT) (fragP->fr_next->fr_address - fragP->fr_address) | |
570 | == fragP->fr_fix)); | |
571 | ||
efaf0ba4 NC |
572 | /* After md_convert_frag, we make the frag into a ".space 0". |
573 | md_convert_frag() should set up any fixSs and constants | |
574 | required. */ | |
252b5132 RH |
575 | frag_wane (fragP); |
576 | break; | |
577 | ||
578 | #ifndef WORKING_DOT_WORD | |
579 | case rs_broken_word: | |
580 | { | |
581 | struct broken_word *lie; | |
582 | ||
583 | if (fragP->fr_subtype) | |
584 | { | |
585 | fragP->fr_fix += md_short_jump_size; | |
586 | for (lie = (struct broken_word *) (fragP->fr_symbol); | |
587 | lie && lie->dispfrag == fragP; | |
588 | lie = lie->next_broken_word) | |
589 | if (lie->added == 1) | |
590 | fragP->fr_fix += md_long_jump_size; | |
591 | } | |
592 | frag_wane (fragP); | |
593 | } | |
594 | break; | |
595 | #endif | |
596 | ||
597 | default: | |
598 | BAD_CASE (fragP->fr_type); | |
599 | break; | |
600 | } | |
601 | } | |
602 | ||
efaf0ba4 | 603 | #endif /* defined (BFD_ASSEMBLER) || !defined (BFD) */ |
252b5132 RH |
604 | |
605 | #ifdef BFD_ASSEMBLER | |
e46d99eb | 606 | static void relax_seg PARAMS ((bfd *, asection *, PTR)); |
252b5132 | 607 | static void |
e46d99eb AM |
608 | relax_seg (abfd, sec, xxx) |
609 | bfd *abfd ATTRIBUTE_UNUSED; | |
610 | asection *sec; | |
611 | PTR xxx; | |
612 | { | |
613 | segment_info_type *seginfo = seg_info (sec); | |
614 | ||
615 | if (seginfo && seginfo->frchainP | |
616 | && relax_segment (seginfo->frchainP->frch_root, sec)) | |
617 | { | |
618 | int *result = (int *) xxx; | |
619 | *result = 1; | |
620 | } | |
621 | } | |
622 | ||
623 | static void size_seg PARAMS ((bfd *, asection *, PTR)); | |
624 | static void | |
625 | size_seg (abfd, sec, xxx) | |
252b5132 RH |
626 | bfd *abfd; |
627 | asection *sec; | |
ab9da554 | 628 | PTR xxx ATTRIBUTE_UNUSED; |
252b5132 RH |
629 | { |
630 | flagword flags; | |
631 | fragS *fragp; | |
632 | segment_info_type *seginfo; | |
633 | int x; | |
634 | valueT size, newsize; | |
635 | ||
636 | subseg_change (sec, 0); | |
637 | ||
252b5132 RH |
638 | seginfo = seg_info (sec); |
639 | if (seginfo && seginfo->frchainP) | |
640 | { | |
252b5132 RH |
641 | for (fragp = seginfo->frchainP->frch_root; fragp; fragp = fragp->fr_next) |
642 | cvt_frag_to_fill (sec, fragp); | |
643 | for (fragp = seginfo->frchainP->frch_root; | |
644 | fragp->fr_next; | |
645 | fragp = fragp->fr_next) | |
efaf0ba4 NC |
646 | /* Walk to last elt. */ |
647 | ; | |
252b5132 RH |
648 | size = fragp->fr_address + fragp->fr_fix; |
649 | } | |
650 | else | |
651 | size = 0; | |
652 | ||
e46d99eb AM |
653 | flags = bfd_get_section_flags (abfd, sec); |
654 | ||
252b5132 RH |
655 | if (size > 0 && ! seginfo->bss) |
656 | flags |= SEC_HAS_CONTENTS; | |
657 | ||
658 | /* @@ This is just an approximation. */ | |
659 | if (seginfo && seginfo->fix_root) | |
660 | flags |= SEC_RELOC; | |
661 | else | |
662 | flags &= ~SEC_RELOC; | |
663 | x = bfd_set_section_flags (abfd, sec, flags); | |
664 | assert (x == true); | |
665 | ||
666 | newsize = md_section_align (sec, size); | |
667 | x = bfd_set_section_size (abfd, sec, newsize); | |
668 | assert (x == true); | |
669 | ||
670 | /* If the size had to be rounded up, add some padding in the last | |
671 | non-empty frag. */ | |
672 | assert (newsize >= size); | |
673 | if (size != newsize) | |
674 | { | |
675 | fragS *last = seginfo->frchainP->frch_last; | |
676 | fragp = seginfo->frchainP->frch_root; | |
677 | while (fragp->fr_next != last) | |
678 | fragp = fragp->fr_next; | |
679 | last->fr_address = size; | |
680 | fragp->fr_offset += newsize - size; | |
681 | } | |
682 | ||
683 | #ifdef tc_frob_section | |
684 | tc_frob_section (sec); | |
685 | #endif | |
686 | #ifdef obj_frob_section | |
687 | obj_frob_section (sec); | |
688 | #endif | |
689 | } | |
690 | ||
691 | #ifdef DEBUG2 | |
692 | static void | |
693 | dump_section_relocs (abfd, sec, stream_) | |
e723ef7c | 694 | bfd *abfd ATTRIBUTE_UNUSED; |
252b5132 RH |
695 | asection *sec; |
696 | char *stream_; | |
697 | { | |
698 | FILE *stream = (FILE *) stream_; | |
699 | segment_info_type *seginfo = seg_info (sec); | |
700 | fixS *fixp = seginfo->fix_root; | |
701 | ||
702 | if (!fixp) | |
703 | return; | |
704 | ||
705 | fprintf (stream, "sec %s relocs:\n", sec->name); | |
706 | while (fixp) | |
707 | { | |
708 | symbolS *s = fixp->fx_addsy; | |
e723ef7c ILT |
709 | |
710 | fprintf (stream, " %08lx: type %d ", (unsigned long) fixp, | |
711 | (int) fixp->fx_r_type); | |
712 | if (s == NULL) | |
713 | fprintf (stream, "no sym\n"); | |
714 | else | |
252b5132 | 715 | { |
e723ef7c ILT |
716 | print_symbol_value_1 (stream, s); |
717 | fprintf (stream, "\n"); | |
252b5132 | 718 | } |
252b5132 RH |
719 | fixp = fixp->fx_next; |
720 | } | |
721 | } | |
722 | #else | |
723 | #define dump_section_relocs(ABFD,SEC,STREAM) ((void) 0) | |
724 | #endif | |
725 | ||
726 | #ifndef EMIT_SECTION_SYMBOLS | |
727 | #define EMIT_SECTION_SYMBOLS 1 | |
728 | #endif | |
729 | ||
730 | static void | |
731 | adjust_reloc_syms (abfd, sec, xxx) | |
ab9da554 | 732 | bfd *abfd ATTRIBUTE_UNUSED; |
252b5132 | 733 | asection *sec; |
ab9da554 | 734 | PTR xxx ATTRIBUTE_UNUSED; |
252b5132 RH |
735 | { |
736 | segment_info_type *seginfo = seg_info (sec); | |
737 | fixS *fixp; | |
738 | ||
739 | if (seginfo == NULL) | |
740 | return; | |
741 | ||
742 | dump_section_relocs (abfd, sec, stderr); | |
743 | ||
744 | for (fixp = seginfo->fix_root; fixp; fixp = fixp->fx_next) | |
745 | if (fixp->fx_done) | |
efaf0ba4 NC |
746 | /* Ignore it. */ |
747 | ; | |
252b5132 RH |
748 | else if (fixp->fx_addsy) |
749 | { | |
750 | symbolS *sym; | |
751 | asection *symsec; | |
752 | ||
753 | #ifdef DEBUG5 | |
754 | fprintf (stderr, "\n\nadjusting fixup:\n"); | |
755 | print_fixup (fixp); | |
756 | #endif | |
757 | ||
758 | sym = fixp->fx_addsy; | |
759 | ||
760 | /* All symbols should have already been resolved at this | |
761 | point. It is possible to see unresolved expression | |
762 | symbols, though, since they are not in the regular symbol | |
763 | table. */ | |
49309057 | 764 | if (sym != NULL) |
6386f3a7 | 765 | resolve_symbol_value (sym); |
efaf0ba4 | 766 | |
49309057 | 767 | if (fixp->fx_subsy != NULL) |
6386f3a7 | 768 | resolve_symbol_value (fixp->fx_subsy); |
252b5132 RH |
769 | |
770 | /* If this symbol is equated to an undefined symbol, convert | |
771 | the fixup to being against that symbol. */ | |
e0890092 | 772 | if (sym != NULL && symbol_equated_reloc_p (sym)) |
252b5132 | 773 | { |
49309057 ILT |
774 | fixp->fx_offset += symbol_get_value_expression (sym)->X_add_number; |
775 | sym = symbol_get_value_expression (sym)->X_add_symbol; | |
252b5132 RH |
776 | fixp->fx_addsy = sym; |
777 | } | |
778 | ||
49309057 | 779 | if (sym != NULL && symbol_mri_common_p (sym)) |
252b5132 RH |
780 | { |
781 | /* These symbols are handled specially in fixup_segment. */ | |
782 | goto done; | |
783 | } | |
784 | ||
785 | symsec = S_GET_SEGMENT (sym); | |
786 | ||
787 | if (symsec == NULL) | |
788 | abort (); | |
efaf0ba4 | 789 | |
252b5132 RH |
790 | if (bfd_is_abs_section (symsec)) |
791 | { | |
792 | /* The fixup_segment routine will not use this symbol in a | |
793 | relocation unless TC_FORCE_RELOCATION returns 1. */ | |
794 | if (TC_FORCE_RELOCATION (fixp)) | |
795 | { | |
49309057 | 796 | symbol_mark_used_in_reloc (fixp->fx_addsy); |
252b5132 RH |
797 | #ifdef UNDEFINED_DIFFERENCE_OK |
798 | if (fixp->fx_subsy != NULL) | |
49309057 | 799 | symbol_mark_used_in_reloc (fixp->fx_subsy); |
252b5132 RH |
800 | #endif |
801 | } | |
802 | goto done; | |
803 | } | |
804 | ||
805 | /* If it's one of these sections, assume the symbol is | |
806 | definitely going to be output. The code in | |
807 | md_estimate_size_before_relax in tc-mips.c uses this test | |
808 | as well, so if you change this code you should look at that | |
809 | code. */ | |
810 | if (bfd_is_und_section (symsec) | |
811 | || bfd_is_com_section (symsec)) | |
812 | { | |
49309057 | 813 | symbol_mark_used_in_reloc (fixp->fx_addsy); |
252b5132 RH |
814 | #ifdef UNDEFINED_DIFFERENCE_OK |
815 | /* We have the difference of an undefined symbol and some | |
816 | other symbol. Make sure to mark the other symbol as used | |
817 | in a relocation so that it will always be output. */ | |
818 | if (fixp->fx_subsy) | |
49309057 | 819 | symbol_mark_used_in_reloc (fixp->fx_subsy); |
252b5132 RH |
820 | #endif |
821 | goto done; | |
822 | } | |
823 | ||
7565ed77 ILT |
824 | /* Don't try to reduce relocs which refer to non-local symbols |
825 | in .linkonce sections. It can lead to confusion when a | |
826 | debugging section refers to a .linkonce section. I hope | |
827 | this will always be correct. */ | |
828 | if (symsec != sec && ! S_IS_LOCAL (sym)) | |
252b5132 RH |
829 | { |
830 | boolean linkonce; | |
831 | ||
832 | linkonce = false; | |
833 | #ifdef BFD_ASSEMBLER | |
834 | if ((bfd_get_section_flags (stdoutput, symsec) & SEC_LINK_ONCE) | |
835 | != 0) | |
836 | linkonce = true; | |
837 | #endif | |
838 | #ifdef OBJ_ELF | |
839 | /* The GNU toolchain uses an extension for ELF: a section | |
840 | beginning with the magic string .gnu.linkonce is a | |
841 | linkonce section. */ | |
842 | if (strncmp (segment_name (symsec), ".gnu.linkonce", | |
843 | sizeof ".gnu.linkonce" - 1) == 0) | |
844 | linkonce = true; | |
845 | #endif | |
846 | ||
847 | if (linkonce) | |
848 | { | |
49309057 | 849 | symbol_mark_used_in_reloc (fixp->fx_addsy); |
252b5132 RH |
850 | #ifdef UNDEFINED_DIFFERENCE_OK |
851 | if (fixp->fx_subsy != NULL) | |
49309057 | 852 | symbol_mark_used_in_reloc (fixp->fx_subsy); |
252b5132 RH |
853 | #endif |
854 | goto done; | |
855 | } | |
856 | } | |
857 | ||
858 | /* Since we're reducing to section symbols, don't attempt to reduce | |
859 | anything that's already using one. */ | |
49309057 | 860 | if (symbol_section_p (sym)) |
252b5132 | 861 | { |
49309057 | 862 | symbol_mark_used_in_reloc (fixp->fx_addsy); |
252b5132 RH |
863 | goto done; |
864 | } | |
865 | ||
866 | #ifdef BFD_ASSEMBLER | |
867 | /* We can never adjust a reloc against a weak symbol. If we | |
868 | did, and the weak symbol was overridden by a real symbol | |
869 | somewhere else, then our relocation would be pointing at | |
870 | the wrong area of memory. */ | |
871 | if (S_IS_WEAK (sym)) | |
872 | { | |
49309057 | 873 | symbol_mark_used_in_reloc (fixp->fx_addsy); |
252b5132 RH |
874 | goto done; |
875 | } | |
f5fa8ca2 JJ |
876 | |
877 | /* Never adjust a reloc against local symbol in a merge section. */ | |
878 | if (symsec->flags & SEC_MERGE) | |
879 | { | |
880 | symbol_mark_used_in_reloc (fixp->fx_addsy); | |
881 | goto done; | |
882 | } | |
252b5132 RH |
883 | #endif |
884 | ||
885 | /* Is there some other reason we can't adjust this one? (E.g., | |
886 | call/bal links in i960-bout symbols.) */ | |
887 | #ifdef obj_fix_adjustable | |
888 | if (! obj_fix_adjustable (fixp)) | |
889 | { | |
49309057 | 890 | symbol_mark_used_in_reloc (fixp->fx_addsy); |
252b5132 RH |
891 | goto done; |
892 | } | |
893 | #endif | |
894 | ||
895 | /* Is there some other (target cpu dependent) reason we can't adjust | |
896 | this one? (E.g. relocations involving function addresses on | |
897 | the PA. */ | |
898 | #ifdef tc_fix_adjustable | |
899 | if (! tc_fix_adjustable (fixp)) | |
900 | { | |
49309057 | 901 | symbol_mark_used_in_reloc (fixp->fx_addsy); |
252b5132 RH |
902 | goto done; |
903 | } | |
904 | #endif | |
905 | ||
906 | /* If the section symbol isn't going to be output, the relocs | |
907 | at least should still work. If not, figure out what to do | |
908 | when we run into that case. | |
909 | ||
910 | We refetch the segment when calling section_symbol, rather | |
911 | than using symsec, because S_GET_VALUE may wind up changing | |
efaf0ba4 | 912 | the section when it calls resolve_symbol_value. */ |
252b5132 RH |
913 | fixp->fx_offset += S_GET_VALUE (sym); |
914 | fixp->fx_addsy = section_symbol (S_GET_SEGMENT (sym)); | |
49309057 | 915 | symbol_mark_used_in_reloc (fixp->fx_addsy); |
e723ef7c ILT |
916 | #ifdef DEBUG5 |
917 | fprintf (stderr, "\nadjusted fixup:\n"); | |
918 | print_fixup (fixp); | |
919 | #endif | |
252b5132 RH |
920 | |
921 | done: | |
922 | ; | |
923 | } | |
efaf0ba4 | 924 | #if 1 /* def RELOC_REQUIRES_SYMBOL */ |
252b5132 RH |
925 | else |
926 | { | |
927 | /* There was no symbol required by this relocation. However, | |
928 | BFD doesn't really handle relocations without symbols well. | |
929 | (At least, the COFF support doesn't.) So for now we fake up | |
930 | a local symbol in the absolute section. */ | |
931 | ||
932 | fixp->fx_addsy = section_symbol (absolute_section); | |
efaf0ba4 NC |
933 | #if 0 |
934 | fixp->fx_addsy->sy_used_in_reloc = 1; | |
935 | #endif | |
252b5132 RH |
936 | } |
937 | #endif | |
938 | ||
939 | dump_section_relocs (abfd, sec, stderr); | |
940 | } | |
941 | ||
942 | static void | |
943 | write_relocs (abfd, sec, xxx) | |
944 | bfd *abfd; | |
945 | asection *sec; | |
ab9da554 | 946 | PTR xxx ATTRIBUTE_UNUSED; |
252b5132 RH |
947 | { |
948 | segment_info_type *seginfo = seg_info (sec); | |
927781e2 | 949 | unsigned int i; |
252b5132 RH |
950 | unsigned int n; |
951 | arelent **relocs; | |
952 | fixS *fixp; | |
953 | char *err; | |
954 | ||
955 | /* If seginfo is NULL, we did not create this section; don't do | |
956 | anything with it. */ | |
957 | if (seginfo == NULL) | |
958 | return; | |
959 | ||
960 | fixup_segment (seginfo->fix_root, sec); | |
961 | ||
962 | n = 0; | |
963 | for (fixp = seginfo->fix_root; fixp; fixp = fixp->fx_next) | |
964 | n++; | |
965 | ||
966 | #ifndef RELOC_EXPANSION_POSSIBLE | |
967 | /* Set up reloc information as well. */ | |
968 | relocs = (arelent **) xmalloc (n * sizeof (arelent *)); | |
efaf0ba4 | 969 | memset ((char *) relocs, 0, n * sizeof (arelent *)); |
252b5132 RH |
970 | |
971 | i = 0; | |
972 | for (fixp = seginfo->fix_root; fixp != (fixS *) NULL; fixp = fixp->fx_next) | |
973 | { | |
974 | arelent *reloc; | |
975 | bfd_reloc_status_type s; | |
976 | symbolS *sym; | |
977 | ||
978 | if (fixp->fx_done) | |
979 | { | |
980 | n--; | |
981 | continue; | |
982 | } | |
983 | ||
984 | /* If this is an undefined symbol which was equated to another | |
e0890092 | 985 | symbol, then generate the reloc against the latter symbol |
252b5132 RH |
986 | rather than the former. */ |
987 | sym = fixp->fx_addsy; | |
e0890092 | 988 | while (symbol_equated_reloc_p (sym)) |
252b5132 RH |
989 | { |
990 | symbolS *n; | |
991 | ||
992 | /* We must avoid looping, as that can occur with a badly | |
993 | written program. */ | |
49309057 | 994 | n = symbol_get_value_expression (sym)->X_add_symbol; |
252b5132 RH |
995 | if (n == sym) |
996 | break; | |
49309057 | 997 | fixp->fx_offset += symbol_get_value_expression (sym)->X_add_number; |
252b5132 RH |
998 | sym = n; |
999 | } | |
1000 | fixp->fx_addsy = sym; | |
1001 | ||
1002 | reloc = tc_gen_reloc (sec, fixp); | |
1003 | if (!reloc) | |
1004 | { | |
1005 | n--; | |
1006 | continue; | |
1007 | } | |
1008 | ||
1009 | #if 0 | |
1010 | /* This test is triggered inappropriately for the SH. */ | |
1011 | if (fixp->fx_where + fixp->fx_size | |
1012 | > fixp->fx_frag->fr_fix + fixp->fx_frag->fr_offset) | |
1013 | abort (); | |
1014 | #endif | |
1015 | ||
1016 | s = bfd_install_relocation (stdoutput, reloc, | |
1017 | fixp->fx_frag->fr_literal, | |
1018 | fixp->fx_frag->fr_address, | |
1019 | sec, &err); | |
1020 | switch (s) | |
1021 | { | |
1022 | case bfd_reloc_ok: | |
1023 | break; | |
1024 | case bfd_reloc_overflow: | |
1025 | as_bad_where (fixp->fx_file, fixp->fx_line, _("relocation overflow")); | |
1026 | break; | |
1027 | case bfd_reloc_outofrange: | |
1028 | as_bad_where (fixp->fx_file, fixp->fx_line, _("relocation out of range")); | |
1029 | break; | |
1030 | default: | |
1031 | as_fatal (_("%s:%u: bad return from bfd_install_relocation: %x"), | |
1032 | fixp->fx_file, fixp->fx_line, s); | |
1033 | } | |
1034 | relocs[i++] = reloc; | |
1035 | } | |
1036 | #else | |
1037 | n = n * MAX_RELOC_EXPANSION; | |
1038 | /* Set up reloc information as well. */ | |
1039 | relocs = (arelent **) xmalloc (n * sizeof (arelent *)); | |
1040 | ||
1041 | i = 0; | |
1042 | for (fixp = seginfo->fix_root; fixp != (fixS *) NULL; fixp = fixp->fx_next) | |
1043 | { | |
1044 | arelent **reloc; | |
1045 | char *data; | |
1046 | bfd_reloc_status_type s; | |
1047 | symbolS *sym; | |
1048 | int j; | |
1049 | ||
1050 | if (fixp->fx_done) | |
1051 | { | |
1052 | n--; | |
1053 | continue; | |
1054 | } | |
1055 | ||
1056 | /* If this is an undefined symbol which was equated to another | |
44852b19 | 1057 | symbol, then generate the reloc against the latter symbol |
252b5132 RH |
1058 | rather than the former. */ |
1059 | sym = fixp->fx_addsy; | |
e0890092 | 1060 | while (symbol_equated_reloc_p (sym)) |
49309057 | 1061 | sym = symbol_get_value_expression (sym)->X_add_symbol; |
252b5132 RH |
1062 | fixp->fx_addsy = sym; |
1063 | ||
1064 | reloc = tc_gen_reloc (sec, fixp); | |
1065 | ||
1066 | for (j = 0; reloc[j]; j++) | |
1067 | { | |
efaf0ba4 NC |
1068 | relocs[i++] = reloc[j]; |
1069 | assert (i <= n); | |
252b5132 RH |
1070 | } |
1071 | data = fixp->fx_frag->fr_literal + fixp->fx_where; | |
1072 | if (fixp->fx_where + fixp->fx_size | |
1073 | > fixp->fx_frag->fr_fix + fixp->fx_frag->fr_offset) | |
1074 | as_bad_where (fixp->fx_file, fixp->fx_line, | |
1075 | _("internal error: fixup not contained within frag")); | |
1076 | for (j = 0; reloc[j]; j++) | |
efaf0ba4 | 1077 | { |
252b5132 RH |
1078 | s = bfd_install_relocation (stdoutput, reloc[j], |
1079 | fixp->fx_frag->fr_literal, | |
1080 | fixp->fx_frag->fr_address, | |
1081 | sec, &err); | |
efaf0ba4 | 1082 | switch (s) |
252b5132 RH |
1083 | { |
1084 | case bfd_reloc_ok: | |
1085 | break; | |
1086 | case bfd_reloc_overflow: | |
1087 | as_bad_where (fixp->fx_file, fixp->fx_line, | |
1088 | _("relocation overflow")); | |
1089 | break; | |
1090 | default: | |
1091 | as_fatal (_("%s:%u: bad return from bfd_install_relocation"), | |
1092 | fixp->fx_file, fixp->fx_line); | |
1093 | } | |
efaf0ba4 | 1094 | } |
252b5132 RH |
1095 | } |
1096 | n = i; | |
1097 | #endif | |
1098 | ||
1099 | #ifdef DEBUG4 | |
1100 | { | |
1101 | int i, j, nsyms; | |
1102 | asymbol **sympp; | |
1103 | sympp = bfd_get_outsymbols (stdoutput); | |
1104 | nsyms = bfd_get_symcount (stdoutput); | |
1105 | for (i = 0; i < n; i++) | |
1106 | if (((*relocs[i]->sym_ptr_ptr)->flags & BSF_SECTION_SYM) == 0) | |
1107 | { | |
1108 | for (j = 0; j < nsyms; j++) | |
1109 | if (sympp[j] == *relocs[i]->sym_ptr_ptr) | |
1110 | break; | |
1111 | if (j == nsyms) | |
1112 | abort (); | |
1113 | } | |
1114 | } | |
1115 | #endif | |
1116 | ||
1117 | if (n) | |
1118 | bfd_set_reloc (stdoutput, sec, relocs, n); | |
1119 | else | |
1120 | bfd_set_section_flags (abfd, sec, | |
1121 | (bfd_get_section_flags (abfd, sec) | |
1122 | & (flagword) ~SEC_RELOC)); | |
1123 | ||
945a1a6b ILT |
1124 | #ifdef SET_SECTION_RELOCS |
1125 | SET_SECTION_RELOCS (sec, relocs, n); | |
1126 | #endif | |
1127 | ||
252b5132 RH |
1128 | #ifdef DEBUG3 |
1129 | { | |
1130 | int i; | |
1131 | arelent *r; | |
1132 | asymbol *s; | |
1133 | fprintf (stderr, "relocs for sec %s\n", sec->name); | |
1134 | for (i = 0; i < n; i++) | |
1135 | { | |
1136 | r = relocs[i]; | |
1137 | s = *r->sym_ptr_ptr; | |
1138 | fprintf (stderr, " reloc %2d @%08x off %4x : sym %-10s addend %x\n", | |
1139 | i, r, r->address, s->name, r->addend); | |
1140 | } | |
1141 | } | |
1142 | #endif | |
1143 | } | |
1144 | ||
1145 | static void | |
1146 | write_contents (abfd, sec, xxx) | |
ab9da554 | 1147 | bfd *abfd ATTRIBUTE_UNUSED; |
252b5132 | 1148 | asection *sec; |
ab9da554 | 1149 | PTR xxx ATTRIBUTE_UNUSED; |
252b5132 RH |
1150 | { |
1151 | segment_info_type *seginfo = seg_info (sec); | |
1152 | unsigned long offset = 0; | |
1153 | fragS *f; | |
1154 | ||
1155 | /* Write out the frags. */ | |
1156 | if (seginfo == NULL | |
efaf0ba4 | 1157 | || !(bfd_get_section_flags (abfd, sec) & SEC_HAS_CONTENTS)) |
252b5132 RH |
1158 | return; |
1159 | ||
1160 | for (f = seginfo->frchainP->frch_root; | |
1161 | f; | |
1162 | f = f->fr_next) | |
1163 | { | |
1164 | int x; | |
1165 | unsigned long fill_size; | |
1166 | char *fill_literal; | |
1167 | long count; | |
1168 | ||
1169 | assert (f->fr_type == rs_fill); | |
1170 | if (f->fr_fix) | |
1171 | { | |
1172 | x = bfd_set_section_contents (stdoutput, sec, | |
1173 | f->fr_literal, (file_ptr) offset, | |
1174 | (bfd_size_type) f->fr_fix); | |
1175 | if (x == false) | |
1176 | { | |
1177 | bfd_perror (stdoutput->filename); | |
1178 | as_perror (_("FATAL: Can't write %s"), stdoutput->filename); | |
1179 | exit (EXIT_FAILURE); | |
1180 | } | |
1181 | offset += f->fr_fix; | |
1182 | } | |
1183 | fill_literal = f->fr_literal + f->fr_fix; | |
1184 | fill_size = f->fr_var; | |
1185 | count = f->fr_offset; | |
1186 | assert (count >= 0); | |
1187 | if (fill_size && count) | |
1188 | { | |
1189 | char buf[256]; | |
efaf0ba4 | 1190 | if (fill_size > sizeof (buf)) |
252b5132 | 1191 | { |
efaf0ba4 | 1192 | /* Do it the old way. Can this ever happen? */ |
252b5132 RH |
1193 | while (count--) |
1194 | { | |
1195 | x = bfd_set_section_contents (stdoutput, sec, | |
1196 | fill_literal, | |
1197 | (file_ptr) offset, | |
1198 | (bfd_size_type) fill_size); | |
1199 | if (x == false) | |
1200 | { | |
1201 | bfd_perror (stdoutput->filename); | |
efaf0ba4 NC |
1202 | as_perror (_("FATAL: Can't write %s"), |
1203 | stdoutput->filename); | |
252b5132 RH |
1204 | exit (EXIT_FAILURE); |
1205 | } | |
1206 | offset += fill_size; | |
1207 | } | |
1208 | } | |
1209 | else | |
1210 | { | |
1211 | /* Build a buffer full of fill objects and output it as | |
1212 | often as necessary. This saves on the overhead of | |
1213 | potentially lots of bfd_set_section_contents calls. */ | |
1214 | int n_per_buf, i; | |
1215 | if (fill_size == 1) | |
1216 | { | |
1217 | n_per_buf = sizeof (buf); | |
1218 | memset (buf, *fill_literal, n_per_buf); | |
1219 | } | |
1220 | else | |
1221 | { | |
1222 | char *bufp; | |
efaf0ba4 | 1223 | n_per_buf = sizeof (buf) / fill_size; |
252b5132 | 1224 | for (i = n_per_buf, bufp = buf; i; i--, bufp += fill_size) |
efaf0ba4 | 1225 | memcpy (bufp, fill_literal, fill_size); |
252b5132 RH |
1226 | } |
1227 | for (; count > 0; count -= n_per_buf) | |
1228 | { | |
1229 | n_per_buf = n_per_buf > count ? count : n_per_buf; | |
efaf0ba4 NC |
1230 | x = bfd_set_section_contents |
1231 | (stdoutput, sec, buf, (file_ptr) offset, | |
1232 | (bfd_size_type) n_per_buf * fill_size); | |
252b5132 | 1233 | if (x != true) |
0e389e77 | 1234 | as_fatal (_("cannot write to output file")); |
252b5132 RH |
1235 | offset += n_per_buf * fill_size; |
1236 | } | |
1237 | } | |
1238 | } | |
1239 | } | |
1240 | } | |
1241 | #endif | |
1242 | ||
1243 | #if defined(BFD_ASSEMBLER) || (!defined (BFD) && !defined(OBJ_AOUT)) | |
1244 | static void | |
1245 | merge_data_into_text () | |
1246 | { | |
1247 | #if defined(BFD_ASSEMBLER) || defined(MANY_SEGMENTS) | |
1248 | seg_info (text_section)->frchainP->frch_last->fr_next = | |
1249 | seg_info (data_section)->frchainP->frch_root; | |
1250 | seg_info (text_section)->frchainP->frch_last = | |
1251 | seg_info (data_section)->frchainP->frch_last; | |
1252 | seg_info (data_section)->frchainP = 0; | |
1253 | #else | |
1254 | fixS *tmp; | |
1255 | ||
1256 | text_last_frag->fr_next = data_frag_root; | |
1257 | text_last_frag = data_last_frag; | |
1258 | data_last_frag = NULL; | |
1259 | data_frag_root = NULL; | |
1260 | if (text_fix_root) | |
1261 | { | |
1262 | for (tmp = text_fix_root; tmp->fx_next; tmp = tmp->fx_next);; | |
1263 | tmp->fx_next = data_fix_root; | |
1264 | text_fix_tail = data_fix_tail; | |
1265 | } | |
1266 | else | |
1267 | text_fix_root = data_fix_root; | |
1268 | data_fix_root = NULL; | |
1269 | #endif | |
1270 | } | |
efaf0ba4 | 1271 | #endif /* BFD_ASSEMBLER || (! BFD && ! OBJ_AOUT) */ |
252b5132 RH |
1272 | |
1273 | #if !defined (BFD_ASSEMBLER) && !defined (BFD) | |
1274 | static void | |
1275 | relax_and_size_all_segments () | |
1276 | { | |
1277 | fragS *fragP; | |
1278 | ||
1279 | relax_segment (text_frag_root, SEG_TEXT); | |
1280 | relax_segment (data_frag_root, SEG_DATA); | |
1281 | relax_segment (bss_frag_root, SEG_BSS); | |
252b5132 | 1282 | |
efaf0ba4 | 1283 | /* Now the addresses of frags are correct within the segment. */ |
252b5132 RH |
1284 | know (text_last_frag->fr_type == rs_fill && text_last_frag->fr_offset == 0); |
1285 | H_SET_TEXT_SIZE (&headers, text_last_frag->fr_address); | |
1286 | text_last_frag->fr_address = H_GET_TEXT_SIZE (&headers); | |
1287 | ||
efaf0ba4 NC |
1288 | /* Join the 2 segments into 1 huge segment. |
1289 | To do this, re-compute every rn_address in the SEG_DATA frags. | |
1290 | Then join the data frags after the text frags. | |
58a77e41 | 1291 | |
efaf0ba4 | 1292 | Determine a_data [length of data segment]. */ |
252b5132 RH |
1293 | if (data_frag_root) |
1294 | { | |
1295 | register relax_addressT slide; | |
1296 | ||
efaf0ba4 NC |
1297 | know ((text_last_frag->fr_type == rs_fill) |
1298 | && (text_last_frag->fr_offset == 0)); | |
252b5132 RH |
1299 | |
1300 | H_SET_DATA_SIZE (&headers, data_last_frag->fr_address); | |
1301 | data_last_frag->fr_address = H_GET_DATA_SIZE (&headers); | |
efaf0ba4 | 1302 | slide = H_GET_TEXT_SIZE (&headers); /* & in file of the data segment. */ |
252b5132 RH |
1303 | #ifdef OBJ_BOUT |
1304 | #define RoundUp(N,S) (((N)+(S)-1)&-(S)) | |
1305 | /* For b.out: If the data section has a strict alignment | |
1306 | requirement, its load address in the .o file will be | |
1307 | rounded up from the size of the text section. These | |
1308 | two values are *not* the same! Similarly for the bss | |
1309 | section.... */ | |
1310 | slide = RoundUp (slide, 1 << section_alignment[SEG_DATA]); | |
1311 | #endif | |
1312 | ||
1313 | for (fragP = data_frag_root; fragP; fragP = fragP->fr_next) | |
efaf0ba4 | 1314 | fragP->fr_address += slide; |
252b5132 RH |
1315 | |
1316 | know (text_last_frag != 0); | |
1317 | text_last_frag->fr_next = data_frag_root; | |
1318 | } | |
1319 | else | |
1320 | { | |
1321 | H_SET_DATA_SIZE (&headers, 0); | |
1322 | } | |
1323 | ||
1324 | #ifdef OBJ_BOUT | |
1325 | /* See above comments on b.out data section address. */ | |
1326 | { | |
1327 | long bss_vma; | |
1328 | if (data_last_frag == 0) | |
1329 | bss_vma = H_GET_TEXT_SIZE (&headers); | |
1330 | else | |
1331 | bss_vma = data_last_frag->fr_address; | |
1332 | bss_vma = RoundUp (bss_vma, 1 << section_alignment[SEG_BSS]); | |
1333 | bss_address_frag.fr_address = bss_vma; | |
1334 | } | |
efaf0ba4 | 1335 | #else /* ! OBJ_BOUT */ |
252b5132 RH |
1336 | bss_address_frag.fr_address = (H_GET_TEXT_SIZE (&headers) + |
1337 | H_GET_DATA_SIZE (&headers)); | |
1338 | ||
efaf0ba4 | 1339 | #endif /* ! OBJ_BOUT */ |
252b5132 | 1340 | |
efaf0ba4 | 1341 | /* Slide all the frags. */ |
252b5132 RH |
1342 | if (bss_frag_root) |
1343 | { | |
1344 | relax_addressT slide = bss_address_frag.fr_address; | |
1345 | ||
1346 | for (fragP = bss_frag_root; fragP; fragP = fragP->fr_next) | |
efaf0ba4 | 1347 | fragP->fr_address += slide; |
252b5132 RH |
1348 | } |
1349 | ||
1350 | if (bss_last_frag) | |
1351 | H_SET_BSS_SIZE (&headers, | |
1352 | bss_last_frag->fr_address - bss_frag_root->fr_address); | |
1353 | else | |
1354 | H_SET_BSS_SIZE (&headers, 0); | |
1355 | } | |
efaf0ba4 | 1356 | #endif /* ! BFD_ASSEMBLER && ! BFD */ |
252b5132 RH |
1357 | |
1358 | #if defined (BFD_ASSEMBLER) || !defined (BFD) | |
1359 | ||
1360 | #ifdef BFD_ASSEMBLER | |
1361 | static void | |
1362 | set_symtab () | |
1363 | { | |
1364 | int nsyms; | |
1365 | asymbol **asympp; | |
1366 | symbolS *symp; | |
1367 | boolean result; | |
0e1a166b | 1368 | extern PTR bfd_alloc PARAMS ((bfd *, bfd_size_type)); |
252b5132 RH |
1369 | |
1370 | /* Count symbols. We can't rely on a count made by the loop in | |
1371 | write_object_file, because *_frob_file may add a new symbol or | |
1372 | two. */ | |
1373 | nsyms = 0; | |
1374 | for (symp = symbol_rootP; symp; symp = symbol_next (symp)) | |
1375 | nsyms++; | |
1376 | ||
1377 | if (nsyms) | |
1378 | { | |
1379 | int i; | |
0e1a166b | 1380 | bfd_size_type amt = (bfd_size_type) nsyms * sizeof (asymbol *); |
252b5132 | 1381 | |
0e1a166b | 1382 | asympp = (asymbol **) bfd_alloc (stdoutput, amt); |
252b5132 RH |
1383 | symp = symbol_rootP; |
1384 | for (i = 0; i < nsyms; i++, symp = symbol_next (symp)) | |
1385 | { | |
49309057 ILT |
1386 | asympp[i] = symbol_get_bfdsym (symp); |
1387 | symbol_mark_written (symp); | |
252b5132 RH |
1388 | } |
1389 | } | |
1390 | else | |
1391 | asympp = 0; | |
1392 | result = bfd_set_symtab (stdoutput, asympp, nsyms); | |
1393 | assert (result == true); | |
1394 | symbol_table_frozen = 1; | |
1395 | } | |
1396 | #endif | |
1397 | ||
6aa4f516 | 1398 | #if defined (BFD_ASSEMBLER) && defined (OBJ_COFF) && defined (TE_GO32) |
dbddefbf NC |
1399 | static void |
1400 | set_segment_vma (abfd, sec, xxx) | |
1401 | bfd *abfd; | |
1402 | asection *sec; | |
1403 | PTR xxx ATTRIBUTE_UNUSED; | |
1404 | { | |
1405 | static bfd_vma addr = 0; | |
efaf0ba4 | 1406 | |
dbddefbf NC |
1407 | bfd_set_section_vma (abfd, sec, addr); |
1408 | addr += bfd_section_size (abfd, sec); | |
1409 | } | |
efaf0ba4 | 1410 | #endif /* BFD_ASSEMBLER && OBJ_COFF && !TE_PE */ |
dbddefbf | 1411 | |
252b5132 RH |
1412 | /* Finish the subsegments. After every sub-segment, we fake an |
1413 | ".align ...". This conforms to BSD4.2 brane-damage. We then fake | |
1414 | ".fill 0" because that is the kind of frag that requires least | |
1415 | thought. ".align" frags like to have a following frag since that | |
1416 | makes calculating their intended length trivial. */ | |
1417 | ||
1418 | #ifndef SUB_SEGMENT_ALIGN | |
1419 | #ifdef BFD_ASSEMBLER | |
1420 | #define SUB_SEGMENT_ALIGN(SEG) (0) | |
1421 | #else | |
1422 | #define SUB_SEGMENT_ALIGN(SEG) (2) | |
1423 | #endif | |
1424 | #endif | |
1425 | ||
1426 | void | |
1427 | subsegs_finish () | |
1428 | { | |
1429 | struct frchain *frchainP; | |
1430 | ||
1431 | for (frchainP = frchain_root; frchainP; frchainP = frchainP->frch_next) | |
1432 | { | |
0a9ef439 RH |
1433 | int alignment; |
1434 | ||
252b5132 RH |
1435 | subseg_set (frchainP->frch_seg, frchainP->frch_subseg); |
1436 | ||
1437 | /* This now gets called even if we had errors. In that case, | |
1438 | any alignment is meaningless, and, moreover, will look weird | |
1439 | if we are generating a listing. */ | |
0a9ef439 RH |
1440 | alignment = had_errors () ? 0 : SUB_SEGMENT_ALIGN (now_seg); |
1441 | ||
1442 | /* The last subsegment gets an aligment corresponding to the | |
1443 | alignment of the section. This allows proper nop-filling | |
1444 | at the end of code-bearing sections. */ | |
1445 | if (!frchainP->frch_next || frchainP->frch_next->frch_seg != now_seg) | |
1446 | alignment = get_recorded_alignment (now_seg); | |
1447 | ||
799051fc RH |
1448 | if (subseg_text_p (now_seg)) |
1449 | frag_align_code (alignment, 0); | |
1450 | else | |
1451 | frag_align (alignment, 0, 0); | |
252b5132 RH |
1452 | |
1453 | /* frag_align will have left a new frag. | |
1454 | Use this last frag for an empty ".fill". | |
1455 | ||
1456 | For this segment ... | |
1457 | Create a last frag. Do not leave a "being filled in frag". */ | |
252b5132 RH |
1458 | frag_wane (frag_now); |
1459 | frag_now->fr_fix = 0; | |
1460 | know (frag_now->fr_next == NULL); | |
1461 | } | |
1462 | } | |
1463 | ||
1464 | /* Write the object file. */ | |
1465 | ||
1466 | void | |
1467 | write_object_file () | |
1468 | { | |
1469 | #if ! defined (BFD_ASSEMBLER) || ! defined (WORKING_DOT_WORD) | |
efaf0ba4 | 1470 | fragS *fragP; /* Track along all frags. */ |
252b5132 RH |
1471 | #endif |
1472 | ||
1473 | /* Do we really want to write it? */ | |
1474 | { | |
1475 | int n_warns, n_errs; | |
1476 | n_warns = had_warnings (); | |
1477 | n_errs = had_errors (); | |
1478 | /* The -Z flag indicates that an object file should be generated, | |
1479 | regardless of warnings and errors. */ | |
1480 | if (flag_always_generate_output) | |
1481 | { | |
1482 | if (n_warns || n_errs) | |
0e389e77 | 1483 | as_warn (_("%d error%s, %d warning%s, generating bad object file"), |
252b5132 RH |
1484 | n_errs, n_errs == 1 ? "" : "s", |
1485 | n_warns, n_warns == 1 ? "" : "s"); | |
1486 | } | |
1487 | else | |
1488 | { | |
1489 | if (n_errs) | |
0e389e77 | 1490 | as_fatal (_("%d error%s, %d warning%s, no object file generated"), |
252b5132 RH |
1491 | n_errs, n_errs == 1 ? "" : "s", |
1492 | n_warns, n_warns == 1 ? "" : "s"); | |
1493 | } | |
1494 | } | |
1495 | ||
1496 | #ifdef OBJ_VMS | |
1497 | /* Under VMS we try to be compatible with VAX-11 "C". Thus, we call | |
1498 | a routine to check for the definition of the procedure "_main", | |
efaf0ba4 | 1499 | and if so -- fix it up so that it can be program entry point. */ |
252b5132 | 1500 | vms_check_for_main (); |
efaf0ba4 | 1501 | #endif /* OBJ_VMS */ |
252b5132 RH |
1502 | |
1503 | /* From now on, we don't care about sub-segments. Build one frag chain | |
1504 | for each segment. Linked thru fr_next. */ | |
1505 | ||
1506 | #ifdef BFD_ASSEMBLER | |
1507 | /* Remove the sections created by gas for its own purposes. */ | |
1508 | { | |
1509 | asection **seclist, *sec; | |
1510 | int i; | |
1511 | ||
1512 | seclist = &stdoutput->sections; | |
1513 | while (seclist && *seclist) | |
1514 | { | |
1515 | sec = *seclist; | |
1516 | while (sec == reg_section || sec == expr_section) | |
1517 | { | |
1518 | sec = sec->next; | |
1519 | *seclist = sec; | |
1520 | stdoutput->section_count--; | |
1521 | if (!sec) | |
1522 | break; | |
1523 | } | |
1524 | if (*seclist) | |
1525 | seclist = &(*seclist)->next; | |
1526 | } | |
1527 | i = 0; | |
1528 | bfd_map_over_sections (stdoutput, renumber_sections, &i); | |
1529 | } | |
1530 | ||
1531 | bfd_map_over_sections (stdoutput, chain_frchains_together, (char *) 0); | |
1532 | #else | |
1533 | remove_subsegs (frchain_root, SEG_TEXT, &text_frag_root, &text_last_frag); | |
1534 | remove_subsegs (data0_frchainP, SEG_DATA, &data_frag_root, &data_last_frag); | |
1535 | remove_subsegs (bss0_frchainP, SEG_BSS, &bss_frag_root, &bss_last_frag); | |
1536 | #endif | |
1537 | ||
1538 | /* We have two segments. If user gave -R flag, then we must put the | |
1539 | data frags into the text segment. Do this before relaxing so | |
1540 | we know to take advantage of -R and make shorter addresses. */ | |
1541 | #if !defined (OBJ_AOUT) || defined (BFD_ASSEMBLER) | |
1542 | if (flag_readonly_data_in_text) | |
1543 | { | |
1544 | merge_data_into_text (); | |
1545 | } | |
1546 | #endif | |
1547 | ||
1548 | #ifdef BFD_ASSEMBLER | |
e46d99eb AM |
1549 | while (1) |
1550 | { | |
1551 | int changed; | |
1552 | ||
aacb5251 HPN |
1553 | #ifndef WORKING_DOT_WORD |
1554 | /* We need to reset the markers in the broken word list and | |
1555 | associated frags between calls to relax_segment (via | |
1556 | relax_seg). Since the broken word list is global, we do it | |
1557 | once per round, rather than locally in relax_segment for each | |
1558 | segment. */ | |
1559 | struct broken_word *brokp; | |
1560 | ||
1561 | for (brokp = broken_words; | |
1562 | brokp != (struct broken_word *) NULL; | |
1563 | brokp = brokp->next_broken_word) | |
1564 | { | |
1565 | brokp->added = 0; | |
1566 | ||
1567 | if (brokp->dispfrag != (fragS *) NULL | |
1568 | && brokp->dispfrag->fr_type == rs_broken_word) | |
1569 | brokp->dispfrag->fr_subtype = 0; | |
1570 | } | |
1571 | #endif | |
1572 | ||
e46d99eb AM |
1573 | changed = 0; |
1574 | bfd_map_over_sections (stdoutput, relax_seg, &changed); | |
1575 | if (!changed) | |
1576 | break; | |
1577 | } | |
e027f3e8 | 1578 | |
87548816 NC |
1579 | /* Note - Most ports will use the default value of |
1580 | TC_FINALIZE_SYMS_BEFORE_SIZE_SEG, which 1. This will force | |
1581 | local symbols to be resolved, removing their frag information. | |
1582 | Some ports however, will not have finished relaxing all of | |
1583 | their frags and will still need the local symbol frag | |
1584 | information. These ports can set | |
1585 | TC_FINALIZE_SYMS_BEFORE_SIZE_SEG to 0. */ | |
1586 | finalize_syms = TC_FINALIZE_SYMS_BEFORE_SIZE_SEG; | |
1587 | ||
e46d99eb | 1588 | bfd_map_over_sections (stdoutput, size_seg, (char *) 0); |
252b5132 RH |
1589 | #else |
1590 | relax_and_size_all_segments (); | |
e027f3e8 | 1591 | #endif /* BFD_ASSEMBLER */ |
e46d99eb | 1592 | |
38b87a1b NC |
1593 | /* Relaxation has completed. Freeze all syms. */ |
1594 | finalize_syms = 1; | |
1595 | ||
6aa4f516 | 1596 | #if defined (BFD_ASSEMBLER) && defined (OBJ_COFF) && defined (TE_GO32) |
dbddefbf | 1597 | /* Now that the segments have their final sizes, run through the |
6aa4f516 NC |
1598 | sections and set their vma and lma. !BFD gas sets them, and BFD gas |
1599 | should too. Currently, only DJGPP uses this code, but other | |
1600 | COFF targets may need to execute this too. */ | |
dbddefbf NC |
1601 | bfd_map_over_sections (stdoutput, set_segment_vma, (char *) 0); |
1602 | #endif | |
1603 | ||
252b5132 | 1604 | #ifndef BFD_ASSEMBLER |
efaf0ba4 | 1605 | /* Crawl the symbol chain. |
58a77e41 | 1606 | |
efaf0ba4 NC |
1607 | For each symbol whose value depends on a frag, take the address of |
1608 | that frag and subsume it into the value of the symbol. | |
1609 | After this, there is just one way to lookup a symbol value. | |
1610 | Values are left in their final state for object file emission. | |
1611 | We adjust the values of 'L' local symbols, even if we do | |
1612 | not intend to emit them to the object file, because their values | |
1613 | are needed for fix-ups. | |
58a77e41 | 1614 | |
efaf0ba4 NC |
1615 | Unless we saw a -L flag, remove all symbols that begin with 'L' |
1616 | from the symbol chain. (They are still pointed to by the fixes.) | |
58a77e41 | 1617 | |
efaf0ba4 NC |
1618 | Count the remaining symbols. |
1619 | Assign a symbol number to each symbol. | |
1620 | Count the number of string-table chars we will emit. | |
1621 | Put this info into the headers as appropriate. */ | |
252b5132 RH |
1622 | know (zero_address_frag.fr_address == 0); |
1623 | string_byte_count = sizeof (string_byte_count); | |
1624 | ||
1625 | obj_crawl_symbol_chain (&headers); | |
1626 | ||
1627 | if (string_byte_count == sizeof (string_byte_count)) | |
1628 | string_byte_count = 0; | |
1629 | ||
1630 | H_SET_STRING_SIZE (&headers, string_byte_count); | |
1631 | ||
efaf0ba4 NC |
1632 | /* Addresses of frags now reflect addresses we use in the object file. |
1633 | Symbol values are correct. | |
1634 | Scan the frags, converting any ".org"s and ".align"s to ".fill"s. | |
1635 | Also converting any machine-dependent frags using md_convert_frag(); */ | |
252b5132 RH |
1636 | subseg_change (SEG_TEXT, 0); |
1637 | ||
1638 | for (fragP = text_frag_root; fragP; fragP = fragP->fr_next) | |
1639 | { | |
1640 | /* At this point we have linked all the frags into a single | |
1641 | chain. However, cvt_frag_to_fill may call md_convert_frag | |
1642 | which may call fix_new. We need to ensure that fix_new adds | |
1643 | the fixup to the right section. */ | |
1644 | if (fragP == data_frag_root) | |
1645 | subseg_change (SEG_DATA, 0); | |
1646 | ||
1647 | cvt_frag_to_fill (&headers, SEG_TEXT, fragP); | |
1648 | ||
1649 | /* Some assert macros don't work with # directives mixed in. */ | |
1650 | #ifndef NDEBUG | |
1651 | if (!(fragP->fr_next == NULL | |
1652 | #ifdef OBJ_BOUT | |
1653 | || fragP->fr_next == data_frag_root | |
1654 | #endif | |
1655 | || ((fragP->fr_next->fr_address - fragP->fr_address) | |
1656 | == (fragP->fr_fix + fragP->fr_offset * fragP->fr_var)))) | |
1657 | abort (); | |
1658 | #endif | |
1659 | } | |
efaf0ba4 | 1660 | #endif /* ! BFD_ASSEMBLER */ |
252b5132 RH |
1661 | |
1662 | #ifndef WORKING_DOT_WORD | |
1663 | { | |
1664 | struct broken_word *lie; | |
1665 | struct broken_word **prevP; | |
1666 | ||
1667 | prevP = &broken_words; | |
1668 | for (lie = broken_words; lie; lie = lie->next_broken_word) | |
1669 | if (!lie->added) | |
1670 | { | |
1671 | expressionS exp; | |
1672 | ||
1673 | subseg_change (lie->seg, lie->subseg); | |
1674 | exp.X_op = O_subtract; | |
1675 | exp.X_add_symbol = lie->add; | |
1676 | exp.X_op_symbol = lie->sub; | |
1677 | exp.X_add_number = lie->addnum; | |
1678 | #ifdef BFD_ASSEMBLER | |
1679 | #ifdef TC_CONS_FIX_NEW | |
1680 | TC_CONS_FIX_NEW (lie->frag, | |
efaf0ba4 NC |
1681 | lie->word_goes_here - lie->frag->fr_literal, |
1682 | 2, &exp); | |
252b5132 RH |
1683 | #else |
1684 | fix_new_exp (lie->frag, | |
1685 | lie->word_goes_here - lie->frag->fr_literal, | |
1686 | 2, &exp, 0, BFD_RELOC_16); | |
1687 | #endif | |
1688 | #else | |
1689 | #if defined(TC_SPARC) || defined(TC_A29K) || defined(NEED_FX_R_TYPE) | |
1690 | fix_new_exp (lie->frag, | |
1691 | lie->word_goes_here - lie->frag->fr_literal, | |
1692 | 2, &exp, 0, NO_RELOC); | |
1693 | #else | |
1694 | #ifdef TC_NS32K | |
1695 | fix_new_ns32k_exp (lie->frag, | |
1696 | lie->word_goes_here - lie->frag->fr_literal, | |
1697 | 2, &exp, 0, 0, 2, 0, 0); | |
1698 | #else | |
1699 | fix_new_exp (lie->frag, | |
1700 | lie->word_goes_here - lie->frag->fr_literal, | |
1701 | 2, &exp, 0, 0); | |
efaf0ba4 NC |
1702 | #endif /* TC_NS32K */ |
1703 | #endif /* TC_SPARC|TC_A29K|NEED_FX_R_TYPE */ | |
1704 | #endif /* BFD_ASSEMBLER */ | |
252b5132 RH |
1705 | *prevP = lie->next_broken_word; |
1706 | } | |
1707 | else | |
1708 | prevP = &(lie->next_broken_word); | |
1709 | ||
1710 | for (lie = broken_words; lie;) | |
1711 | { | |
1712 | struct broken_word *untruth; | |
1713 | char *table_ptr; | |
1714 | addressT table_addr; | |
1715 | addressT from_addr, to_addr; | |
1716 | int n, m; | |
1717 | ||
1718 | subseg_change (lie->seg, lie->subseg); | |
1719 | fragP = lie->dispfrag; | |
1720 | ||
1721 | /* Find out how many broken_words go here. */ | |
1722 | n = 0; | |
efaf0ba4 NC |
1723 | for (untruth = lie; |
1724 | untruth && untruth->dispfrag == fragP; | |
1725 | untruth = untruth->next_broken_word) | |
252b5132 RH |
1726 | if (untruth->added == 1) |
1727 | n++; | |
1728 | ||
1729 | table_ptr = lie->dispfrag->fr_opcode; | |
efaf0ba4 NC |
1730 | table_addr = (lie->dispfrag->fr_address |
1731 | + (table_ptr - lie->dispfrag->fr_literal)); | |
252b5132 RH |
1732 | /* Create the jump around the long jumps. This is a short |
1733 | jump from table_ptr+0 to table_ptr+n*long_jump_size. */ | |
1734 | from_addr = table_addr; | |
1735 | to_addr = table_addr + md_short_jump_size + n * md_long_jump_size; | |
efaf0ba4 NC |
1736 | md_create_short_jump (table_ptr, from_addr, to_addr, lie->dispfrag, |
1737 | lie->add); | |
252b5132 RH |
1738 | table_ptr += md_short_jump_size; |
1739 | table_addr += md_short_jump_size; | |
1740 | ||
efaf0ba4 NC |
1741 | for (m = 0; |
1742 | lie && lie->dispfrag == fragP; | |
1743 | m++, lie = lie->next_broken_word) | |
252b5132 RH |
1744 | { |
1745 | if (lie->added == 2) | |
1746 | continue; | |
efaf0ba4 NC |
1747 | /* Patch the jump table. */ |
1748 | /* This is the offset from ??? to table_ptr+0. */ | |
252b5132 | 1749 | to_addr = table_addr - S_GET_VALUE (lie->sub); |
753f6b12 HPN |
1750 | #ifdef TC_CHECK_ADJUSTED_BROKEN_DOT_WORD |
1751 | TC_CHECK_ADJUSTED_BROKEN_DOT_WORD (to_addr, lie); | |
252b5132 RH |
1752 | #endif |
1753 | md_number_to_chars (lie->word_goes_here, to_addr, 2); | |
efaf0ba4 NC |
1754 | for (untruth = lie->next_broken_word; |
1755 | untruth && untruth->dispfrag == fragP; | |
1756 | untruth = untruth->next_broken_word) | |
252b5132 RH |
1757 | { |
1758 | if (untruth->use_jump == lie) | |
1759 | md_number_to_chars (untruth->word_goes_here, to_addr, 2); | |
1760 | } | |
1761 | ||
efaf0ba4 NC |
1762 | /* Install the long jump. */ |
1763 | /* This is a long jump from table_ptr+0 to the final target. */ | |
252b5132 RH |
1764 | from_addr = table_addr; |
1765 | to_addr = S_GET_VALUE (lie->add) + lie->addnum; | |
efaf0ba4 NC |
1766 | md_create_long_jump (table_ptr, from_addr, to_addr, lie->dispfrag, |
1767 | lie->add); | |
252b5132 RH |
1768 | table_ptr += md_long_jump_size; |
1769 | table_addr += md_long_jump_size; | |
1770 | } | |
1771 | } | |
1772 | } | |
efaf0ba4 | 1773 | #endif /* not WORKING_DOT_WORD */ |
252b5132 RH |
1774 | |
1775 | #ifndef BFD_ASSEMBLER | |
1776 | #ifndef OBJ_VMS | |
efaf0ba4 | 1777 | { /* not vms */ |
252b5132 RH |
1778 | char *the_object_file; |
1779 | long object_file_size; | |
efaf0ba4 NC |
1780 | /* Scan every FixS performing fixups. We had to wait until now to |
1781 | do this because md_convert_frag() may have made some fixSs. */ | |
252b5132 RH |
1782 | int trsize, drsize; |
1783 | ||
1784 | subseg_change (SEG_TEXT, 0); | |
1785 | trsize = md_reloc_size * fixup_segment (text_fix_root, SEG_TEXT); | |
1786 | subseg_change (SEG_DATA, 0); | |
1787 | drsize = md_reloc_size * fixup_segment (data_fix_root, SEG_DATA); | |
1788 | H_SET_RELOCATION_SIZE (&headers, trsize, drsize); | |
1789 | ||
efaf0ba4 | 1790 | /* FIXME: Move this stuff into the pre-write-hook. */ |
252b5132 RH |
1791 | H_SET_MAGIC_NUMBER (&headers, magic_number_for_object_file); |
1792 | H_SET_ENTRY_POINT (&headers, 0); | |
1793 | ||
efaf0ba4 | 1794 | obj_pre_write_hook (&headers); /* Extra coff stuff. */ |
252b5132 RH |
1795 | |
1796 | object_file_size = H_GET_FILE_SIZE (&headers); | |
1797 | next_object_file_charP = the_object_file = xmalloc (object_file_size); | |
1798 | ||
1799 | output_file_create (out_file_name); | |
1800 | ||
1801 | obj_header_append (&next_object_file_charP, &headers); | |
1802 | ||
efaf0ba4 NC |
1803 | know ((next_object_file_charP - the_object_file) |
1804 | == H_GET_HEADER_SIZE (&headers)); | |
252b5132 | 1805 | |
efaf0ba4 | 1806 | /* Emit code. */ |
252b5132 RH |
1807 | for (fragP = text_frag_root; fragP; fragP = fragP->fr_next) |
1808 | { | |
1809 | register long count; | |
1810 | register char *fill_literal; | |
1811 | register long fill_size; | |
1812 | ||
1813 | PROGRESS (1); | |
1814 | know (fragP->fr_type == rs_fill); | |
efaf0ba4 NC |
1815 | append (&next_object_file_charP, fragP->fr_literal, |
1816 | (unsigned long) fragP->fr_fix); | |
252b5132 RH |
1817 | fill_literal = fragP->fr_literal + fragP->fr_fix; |
1818 | fill_size = fragP->fr_var; | |
1819 | know (fragP->fr_offset >= 0); | |
1820 | ||
1821 | for (count = fragP->fr_offset; count; count--) | |
efaf0ba4 NC |
1822 | append (&next_object_file_charP, fill_literal, |
1823 | (unsigned long) fill_size); | |
1824 | } | |
252b5132 | 1825 | |
efaf0ba4 NC |
1826 | know ((next_object_file_charP - the_object_file) |
1827 | == (H_GET_HEADER_SIZE (&headers) | |
1828 | + H_GET_TEXT_SIZE (&headers) | |
1829 | + H_GET_DATA_SIZE (&headers))); | |
1830 | ||
1831 | /* Emit relocations. */ | |
1832 | obj_emit_relocations (&next_object_file_charP, text_fix_root, | |
1833 | (relax_addressT) 0); | |
1834 | know ((next_object_file_charP - the_object_file) | |
1835 | == (H_GET_HEADER_SIZE (&headers) | |
1836 | + H_GET_TEXT_SIZE (&headers) | |
1837 | + H_GET_DATA_SIZE (&headers) | |
1838 | + H_GET_TEXT_RELOCATION_SIZE (&headers))); | |
252b5132 RH |
1839 | #ifdef TC_I960 |
1840 | /* Make addresses in data relocation directives relative to beginning of | |
efaf0ba4 NC |
1841 | first data fragment, not end of last text fragment: alignment of the |
1842 | start of the data segment may place a gap between the segments. */ | |
1843 | obj_emit_relocations (&next_object_file_charP, data_fix_root, | |
1844 | data0_frchainP->frch_root->fr_address); | |
1845 | #else /* TC_I960 */ | |
1846 | obj_emit_relocations (&next_object_file_charP, data_fix_root, | |
1847 | text_last_frag->fr_address); | |
1848 | #endif /* TC_I960 */ | |
1849 | ||
1850 | know ((next_object_file_charP - the_object_file) | |
1851 | == (H_GET_HEADER_SIZE (&headers) | |
1852 | + H_GET_TEXT_SIZE (&headers) | |
1853 | + H_GET_DATA_SIZE (&headers) | |
1854 | + H_GET_TEXT_RELOCATION_SIZE (&headers) | |
1855 | + H_GET_DATA_RELOCATION_SIZE (&headers))); | |
1856 | ||
1857 | /* Emit line number entries. */ | |
252b5132 | 1858 | OBJ_EMIT_LINENO (&next_object_file_charP, lineno_rootP, the_object_file); |
efaf0ba4 NC |
1859 | know ((next_object_file_charP - the_object_file) |
1860 | == (H_GET_HEADER_SIZE (&headers) | |
1861 | + H_GET_TEXT_SIZE (&headers) | |
1862 | + H_GET_DATA_SIZE (&headers) | |
1863 | + H_GET_TEXT_RELOCATION_SIZE (&headers) | |
1864 | + H_GET_DATA_RELOCATION_SIZE (&headers) | |
1865 | + H_GET_LINENO_SIZE (&headers))); | |
1866 | ||
1867 | /* Emit symbols. */ | |
252b5132 | 1868 | obj_emit_symbols (&next_object_file_charP, symbol_rootP); |
efaf0ba4 NC |
1869 | know ((next_object_file_charP - the_object_file) |
1870 | == (H_GET_HEADER_SIZE (&headers) | |
1871 | + H_GET_TEXT_SIZE (&headers) | |
1872 | + H_GET_DATA_SIZE (&headers) | |
1873 | + H_GET_TEXT_RELOCATION_SIZE (&headers) | |
1874 | + H_GET_DATA_RELOCATION_SIZE (&headers) | |
1875 | + H_GET_LINENO_SIZE (&headers) | |
1876 | + H_GET_SYMBOL_TABLE_SIZE (&headers))); | |
1877 | ||
1878 | /* Emit strings. */ | |
252b5132 | 1879 | if (string_byte_count > 0) |
efaf0ba4 | 1880 | obj_emit_strings (&next_object_file_charP); |
252b5132 RH |
1881 | |
1882 | #ifdef BFD_HEADERS | |
0e1a166b AM |
1883 | bfd_seek (stdoutput, (file_ptr) 0, 0); |
1884 | bfd_bwrite (the_object_file, (bfd_size_type) object_file_size, stdoutput); | |
252b5132 RH |
1885 | #else |
1886 | ||
efaf0ba4 | 1887 | /* Write the data to the file. */ |
252b5132 RH |
1888 | output_file_append (the_object_file, object_file_size, out_file_name); |
1889 | free (the_object_file); | |
1890 | #endif | |
efaf0ba4 NC |
1891 | } |
1892 | #else /* OBJ_VMS */ | |
1893 | /* Now do the VMS-dependent part of writing the object file. */ | |
252b5132 RH |
1894 | vms_write_object_file (H_GET_TEXT_SIZE (&headers), |
1895 | H_GET_DATA_SIZE (&headers), | |
1896 | H_GET_BSS_SIZE (&headers), | |
1897 | text_frag_root, data_frag_root); | |
efaf0ba4 NC |
1898 | #endif /* OBJ_VMS */ |
1899 | #else /* BFD_ASSEMBLER */ | |
252b5132 RH |
1900 | |
1901 | /* Resolve symbol values. This needs to be done before processing | |
1902 | the relocations. */ | |
1903 | if (symbol_rootP) | |
1904 | { | |
1905 | symbolS *symp; | |
1906 | ||
1907 | for (symp = symbol_rootP; symp; symp = symbol_next (symp)) | |
6386f3a7 | 1908 | resolve_symbol_value (symp); |
252b5132 | 1909 | } |
49309057 | 1910 | resolve_local_symbol_values (); |
252b5132 RH |
1911 | |
1912 | PROGRESS (1); | |
1913 | ||
1914 | #ifdef tc_frob_file_before_adjust | |
1915 | tc_frob_file_before_adjust (); | |
1916 | #endif | |
1917 | #ifdef obj_frob_file_before_adjust | |
1918 | obj_frob_file_before_adjust (); | |
1919 | #endif | |
1920 | ||
efaf0ba4 | 1921 | bfd_map_over_sections (stdoutput, adjust_reloc_syms, (char *) 0); |
252b5132 RH |
1922 | |
1923 | /* Set up symbol table, and write it out. */ | |
1924 | if (symbol_rootP) | |
1925 | { | |
1926 | symbolS *symp; | |
1927 | ||
1928 | for (symp = symbol_rootP; symp; symp = symbol_next (symp)) | |
1929 | { | |
1930 | int punt = 0; | |
1931 | const char *name; | |
1932 | ||
49309057 | 1933 | if (symbol_mri_common_p (symp)) |
252b5132 RH |
1934 | { |
1935 | if (S_IS_EXTERNAL (symp)) | |
1936 | as_bad (_("%s: global symbols not supported in common sections"), | |
1937 | S_GET_NAME (symp)); | |
1938 | symbol_remove (symp, &symbol_rootP, &symbol_lastP); | |
1939 | continue; | |
1940 | } | |
1941 | ||
1942 | name = S_GET_NAME (symp); | |
1943 | if (name) | |
1944 | { | |
efaf0ba4 NC |
1945 | const char *name2 = |
1946 | decode_local_label_name ((char *) S_GET_NAME (symp)); | |
252b5132 RH |
1947 | /* They only differ if `name' is a fb or dollar local |
1948 | label name. */ | |
1949 | if (name2 != name && ! S_IS_DEFINED (symp)) | |
0e389e77 | 1950 | as_bad (_("local label `%s' is not defined"), name2); |
252b5132 RH |
1951 | } |
1952 | ||
1953 | /* Do it again, because adjust_reloc_syms might introduce | |
1954 | more symbols. They'll probably only be section symbols, | |
1955 | but they'll still need to have the values computed. */ | |
6386f3a7 | 1956 | resolve_symbol_value (symp); |
252b5132 RH |
1957 | |
1958 | /* Skip symbols which were equated to undefined or common | |
1959 | symbols. */ | |
e0890092 | 1960 | if (symbol_equated_reloc_p (symp)) |
252b5132 RH |
1961 | { |
1962 | symbol_remove (symp, &symbol_rootP, &symbol_lastP); | |
1963 | continue; | |
1964 | } | |
1965 | ||
1966 | /* So far, common symbols have been treated like undefined symbols. | |
1967 | Put them in the common section now. */ | |
1968 | if (S_IS_DEFINED (symp) == 0 | |
1969 | && S_GET_VALUE (symp) != 0) | |
1970 | S_SET_SEGMENT (symp, bfd_com_section_ptr); | |
1971 | #if 0 | |
1972 | printf ("symbol `%s'\n\t@%x: value=%d flags=%x seg=%s\n", | |
1973 | S_GET_NAME (symp), symp, | |
1974 | S_GET_VALUE (symp), | |
49309057 ILT |
1975 | symbol_get_bfdsym (symp)->flags, |
1976 | segment_name (S_GET_SEGMENT (symp))); | |
252b5132 RH |
1977 | #endif |
1978 | ||
1979 | #ifdef obj_frob_symbol | |
1980 | obj_frob_symbol (symp, punt); | |
1981 | #endif | |
1982 | #ifdef tc_frob_symbol | |
49309057 | 1983 | if (! punt || symbol_used_in_reloc_p (symp)) |
252b5132 RH |
1984 | tc_frob_symbol (symp, punt); |
1985 | #endif | |
1986 | ||
1987 | /* If we don't want to keep this symbol, splice it out of | |
1988 | the chain now. If EMIT_SECTION_SYMBOLS is 0, we never | |
1989 | want section symbols. Otherwise, we skip local symbols | |
1990 | and symbols that the frob_symbol macros told us to punt, | |
1991 | but we keep such symbols if they are used in relocs. */ | |
1992 | if ((! EMIT_SECTION_SYMBOLS | |
49309057 | 1993 | && symbol_section_p (symp)) |
252b5132 RH |
1994 | /* Note that S_IS_EXTERN and S_IS_LOCAL are not always |
1995 | opposites. Sometimes the former checks flags and the | |
1996 | latter examines the name... */ | |
1997 | || (!S_IS_EXTERN (symp) | |
1998 | && (S_IS_LOCAL (symp) || punt) | |
49309057 | 1999 | && ! symbol_used_in_reloc_p (symp))) |
252b5132 RH |
2000 | { |
2001 | symbol_remove (symp, &symbol_rootP, &symbol_lastP); | |
efaf0ba4 | 2002 | |
252b5132 RH |
2003 | /* After symbol_remove, symbol_next(symp) still returns |
2004 | the one that came after it in the chain. So we don't | |
2005 | need to do any extra cleanup work here. */ | |
252b5132 RH |
2006 | continue; |
2007 | } | |
2008 | ||
2009 | /* Make sure we really got a value for the symbol. */ | |
49309057 | 2010 | if (! symbol_resolved_p (symp)) |
252b5132 | 2011 | { |
0e389e77 | 2012 | as_bad (_("can't resolve value for symbol `%s'"), |
252b5132 | 2013 | S_GET_NAME (symp)); |
49309057 | 2014 | symbol_mark_resolved (symp); |
252b5132 RH |
2015 | } |
2016 | ||
2017 | /* Set the value into the BFD symbol. Up til now the value | |
2018 | has only been kept in the gas symbolS struct. */ | |
49309057 | 2019 | symbol_get_bfdsym (symp)->value = S_GET_VALUE (symp); |
252b5132 RH |
2020 | } |
2021 | } | |
2022 | ||
2023 | PROGRESS (1); | |
2024 | ||
2025 | /* Now do any format-specific adjustments to the symbol table, such | |
2026 | as adding file symbols. */ | |
2027 | #ifdef tc_adjust_symtab | |
2028 | tc_adjust_symtab (); | |
2029 | #endif | |
2030 | #ifdef obj_adjust_symtab | |
2031 | obj_adjust_symtab (); | |
2032 | #endif | |
2033 | ||
2034 | /* Now that all the sizes are known, and contents correct, we can | |
2035 | start writing to the file. */ | |
2036 | set_symtab (); | |
2037 | ||
2038 | /* If *_frob_file changes the symbol value at this point, it is | |
2039 | responsible for moving the changed value into symp->bsym->value | |
2040 | as well. Hopefully all symbol value changing can be done in | |
2041 | *_frob_symbol. */ | |
2042 | #ifdef tc_frob_file | |
2043 | tc_frob_file (); | |
2044 | #endif | |
2045 | #ifdef obj_frob_file | |
2046 | obj_frob_file (); | |
2047 | #endif | |
2048 | ||
2049 | bfd_map_over_sections (stdoutput, write_relocs, (char *) 0); | |
2050 | ||
2051 | #ifdef tc_frob_file_after_relocs | |
2052 | tc_frob_file_after_relocs (); | |
2053 | #endif | |
2054 | #ifdef obj_frob_file_after_relocs | |
2055 | obj_frob_file_after_relocs (); | |
2056 | #endif | |
2057 | ||
2058 | bfd_map_over_sections (stdoutput, write_contents, (char *) 0); | |
efaf0ba4 | 2059 | #endif /* BFD_ASSEMBLER */ |
252b5132 | 2060 | } |
efaf0ba4 | 2061 | #endif /* ! BFD */ |
252b5132 RH |
2062 | |
2063 | #ifdef TC_GENERIC_RELAX_TABLE | |
2064 | ||
252b5132 RH |
2065 | /* Relax a fragment by scanning TC_GENERIC_RELAX_TABLE. */ |
2066 | ||
2067 | long | |
c842b53a ILT |
2068 | relax_frag (segment, fragP, stretch) |
2069 | segT segment; | |
252b5132 RH |
2070 | fragS *fragP; |
2071 | long stretch; | |
2072 | { | |
2073 | const relax_typeS *this_type; | |
2074 | const relax_typeS *start_type; | |
2075 | relax_substateT next_state; | |
2076 | relax_substateT this_state; | |
38686296 AM |
2077 | long growth; |
2078 | offsetT aim; | |
2079 | addressT target; | |
2080 | addressT address; | |
2081 | symbolS *symbolP; | |
2082 | const relax_typeS *table; | |
2083 | ||
2084 | target = fragP->fr_offset; | |
2085 | address = fragP->fr_address; | |
2086 | table = TC_GENERIC_RELAX_TABLE; | |
252b5132 RH |
2087 | this_state = fragP->fr_subtype; |
2088 | start_type = this_type = table + this_state; | |
38686296 | 2089 | symbolP = fragP->fr_symbol; |
252b5132 RH |
2090 | |
2091 | if (symbolP) | |
2092 | { | |
c842b53a ILT |
2093 | fragS *sym_frag; |
2094 | ||
2095 | sym_frag = symbol_get_frag (symbolP); | |
2096 | ||
252b5132 RH |
2097 | #ifndef DIFF_EXPR_OK |
2098 | #if !defined (MANY_SEGMENTS) && !defined (BFD_ASSEMBLER) | |
2099 | know ((S_GET_SEGMENT (symbolP) == SEG_ABSOLUTE) | |
2100 | || (S_GET_SEGMENT (symbolP) == SEG_DATA) | |
2101 | || (S_GET_SEGMENT (symbolP) == SEG_BSS) | |
2102 | || (S_GET_SEGMENT (symbolP) == SEG_TEXT)); | |
2103 | #endif | |
c842b53a | 2104 | know (sym_frag != NULL); |
252b5132 RH |
2105 | #endif |
2106 | know (!(S_GET_SEGMENT (symbolP) == absolute_section) | |
c842b53a | 2107 | || sym_frag == &zero_address_frag); |
ac62c346 | 2108 | target += S_GET_VALUE (symbolP); |
252b5132 RH |
2109 | |
2110 | /* If frag has yet to be reached on this pass, | |
2111 | assume it will move by STRETCH just as we did. | |
2112 | If this is not so, it will be because some frag | |
38686296 | 2113 | between grows, and that will force another pass. */ |
252b5132 | 2114 | |
c842b53a | 2115 | if (stretch != 0 |
38686296 AM |
2116 | && sym_frag->relax_marker != fragP->relax_marker |
2117 | && S_GET_SEGMENT (symbolP) == segment) | |
252b5132 RH |
2118 | { |
2119 | target += stretch; | |
2120 | } | |
2121 | } | |
2122 | ||
2123 | aim = target - address - fragP->fr_fix; | |
2124 | #ifdef TC_PCREL_ADJUST | |
efaf0ba4 NC |
2125 | /* Currently only the ns32k family needs this. */ |
2126 | aim += TC_PCREL_ADJUST (fragP); | |
2127 | /* #else */ | |
252b5132 RH |
2128 | /* This machine doesn't want to use pcrel_adjust. |
2129 | In that case, pcrel_adjust should be zero. */ | |
efaf0ba4 NC |
2130 | #if 0 |
2131 | assert (fragP->fr_targ.ns32k.pcrel_adjust == 0); | |
252b5132 | 2132 | #endif |
efaf0ba4 NC |
2133 | #endif |
2134 | #ifdef md_prepare_relax_scan /* formerly called M68K_AIM_KLUDGE */ | |
252b5132 RH |
2135 | md_prepare_relax_scan (fragP, address, aim, this_state, this_type); |
2136 | #endif | |
2137 | ||
2138 | if (aim < 0) | |
2139 | { | |
efaf0ba4 | 2140 | /* Look backwards. */ |
252b5132 RH |
2141 | for (next_state = this_type->rlx_more; next_state;) |
2142 | if (aim >= this_type->rlx_backward) | |
2143 | next_state = 0; | |
2144 | else | |
2145 | { | |
efaf0ba4 | 2146 | /* Grow to next state. */ |
252b5132 RH |
2147 | this_state = next_state; |
2148 | this_type = table + this_state; | |
2149 | next_state = this_type->rlx_more; | |
2150 | } | |
2151 | } | |
2152 | else | |
2153 | { | |
efaf0ba4 | 2154 | /* Look forwards. */ |
252b5132 RH |
2155 | for (next_state = this_type->rlx_more; next_state;) |
2156 | if (aim <= this_type->rlx_forward) | |
2157 | next_state = 0; | |
2158 | else | |
2159 | { | |
efaf0ba4 | 2160 | /* Grow to next state. */ |
252b5132 RH |
2161 | this_state = next_state; |
2162 | this_type = table + this_state; | |
2163 | next_state = this_type->rlx_more; | |
2164 | } | |
2165 | } | |
2166 | ||
2167 | growth = this_type->rlx_length - start_type->rlx_length; | |
2168 | if (growth != 0) | |
2169 | fragP->fr_subtype = this_state; | |
2170 | return growth; | |
2171 | } | |
2172 | ||
efaf0ba4 | 2173 | #endif /* defined (TC_GENERIC_RELAX_TABLE) */ |
252b5132 RH |
2174 | |
2175 | /* Relax_align. Advance location counter to next address that has 'alignment' | |
2176 | lowest order bits all 0s, return size of adjustment made. */ | |
2177 | static relax_addressT | |
2178 | relax_align (address, alignment) | |
efaf0ba4 NC |
2179 | register relax_addressT address; /* Address now. */ |
2180 | register int alignment; /* Alignment (binary). */ | |
252b5132 RH |
2181 | { |
2182 | relax_addressT mask; | |
2183 | relax_addressT new_address; | |
2184 | ||
2185 | mask = ~((~0) << alignment); | |
2186 | new_address = (address + mask) & (~mask); | |
2187 | #ifdef LINKER_RELAXING_SHRINKS_ONLY | |
2188 | if (linkrelax) | |
2189 | /* We must provide lots of padding, so the linker can discard it | |
2190 | when needed. The linker will not add extra space, ever. */ | |
2191 | new_address += (1 << alignment); | |
2192 | #endif | |
2193 | return (new_address - address); | |
2194 | } | |
2195 | ||
efaf0ba4 NC |
2196 | /* Now we have a segment, not a crowd of sub-segments, we can make |
2197 | fr_address values. | |
58a77e41 | 2198 | |
efaf0ba4 | 2199 | Relax the frags. |
58a77e41 | 2200 | |
efaf0ba4 NC |
2201 | After this, all frags in this segment have addresses that are correct |
2202 | within the segment. Since segments live in different file addresses, | |
2203 | these frag addresses may not be the same as final object-file | |
2204 | addresses. */ | |
2205 | ||
e46d99eb | 2206 | int |
252b5132 RH |
2207 | relax_segment (segment_frag_root, segment) |
2208 | struct frag *segment_frag_root; | |
2209 | segT segment; | |
2210 | { | |
2211 | register struct frag *fragP; | |
2212 | register relax_addressT address; | |
e46d99eb AM |
2213 | int ret; |
2214 | ||
252b5132 RH |
2215 | #if !defined (MANY_SEGMENTS) && !defined (BFD_ASSEMBLER) |
2216 | know (segment == SEG_DATA || segment == SEG_TEXT || segment == SEG_BSS); | |
2217 | #endif | |
efaf0ba4 | 2218 | /* In case md_estimate_size_before_relax() wants to make fixSs. */ |
252b5132 RH |
2219 | subseg_change (segment, 0); |
2220 | ||
2221 | /* For each frag in segment: count and store (a 1st guess of) | |
2222 | fr_address. */ | |
2223 | address = 0; | |
2224 | for (fragP = segment_frag_root; fragP; fragP = fragP->fr_next) | |
2225 | { | |
38686296 | 2226 | fragP->relax_marker = 0; |
252b5132 RH |
2227 | fragP->fr_address = address; |
2228 | address += fragP->fr_fix; | |
2229 | ||
2230 | switch (fragP->fr_type) | |
2231 | { | |
2232 | case rs_fill: | |
2233 | address += fragP->fr_offset * fragP->fr_var; | |
2234 | break; | |
2235 | ||
2236 | case rs_align: | |
2237 | case rs_align_code: | |
0a9ef439 | 2238 | case rs_align_test: |
252b5132 RH |
2239 | { |
2240 | addressT offset = relax_align (address, (int) fragP->fr_offset); | |
2241 | ||
2242 | if (fragP->fr_subtype != 0 && offset > fragP->fr_subtype) | |
2243 | offset = 0; | |
2244 | ||
2245 | if (offset % fragP->fr_var != 0) | |
2246 | { | |
54d3cad9 AM |
2247 | as_bad_where (fragP->fr_file, fragP->fr_line, |
2248 | _("alignment padding (%lu bytes) not a multiple of %ld"), | |
2249 | (unsigned long) offset, (long) fragP->fr_var); | |
252b5132 RH |
2250 | offset -= (offset % fragP->fr_var); |
2251 | } | |
2252 | ||
2253 | address += offset; | |
2254 | } | |
2255 | break; | |
2256 | ||
2257 | case rs_org: | |
2258 | case rs_space: | |
2259 | /* Assume .org is nugatory. It will grow with 1st relax. */ | |
2260 | break; | |
2261 | ||
2262 | case rs_machine_dependent: | |
e0890092 AM |
2263 | /* If fr_symbol is an expression, this call to |
2264 | resolve_symbol_value sets up the correct segment, which will | |
2265 | likely be needed in md_estimate_size_before_relax. */ | |
2266 | if (fragP->fr_symbol) | |
2267 | resolve_symbol_value (fragP->fr_symbol); | |
2268 | ||
252b5132 RH |
2269 | address += md_estimate_size_before_relax (fragP, segment); |
2270 | break; | |
2271 | ||
2272 | #ifndef WORKING_DOT_WORD | |
efaf0ba4 | 2273 | /* Broken words don't concern us yet. */ |
252b5132 RH |
2274 | case rs_broken_word: |
2275 | break; | |
2276 | #endif | |
2277 | ||
2278 | case rs_leb128: | |
efaf0ba4 | 2279 | /* Initial guess is always 1; doing otherwise can result in |
252b5132 RH |
2280 | stable solutions that are larger than the minimum. */ |
2281 | address += fragP->fr_offset = 1; | |
2282 | break; | |
2283 | ||
2284 | case rs_cfa: | |
2285 | address += eh_frame_estimate_size_before_relax (fragP); | |
2286 | break; | |
2287 | ||
220e750f RH |
2288 | case rs_dwarf2dbg: |
2289 | address += dwarf2dbg_estimate_size_before_relax (fragP); | |
2290 | break; | |
2291 | ||
252b5132 RH |
2292 | default: |
2293 | BAD_CASE (fragP->fr_type); | |
2294 | break; | |
efaf0ba4 NC |
2295 | } |
2296 | } | |
252b5132 RH |
2297 | |
2298 | /* Do relax(). */ | |
2299 | { | |
efaf0ba4 NC |
2300 | long stretch; /* May be any size, 0 or negative. */ |
2301 | /* Cumulative number of addresses we have relaxed this pass. | |
2302 | We may have relaxed more than one address. */ | |
e46d99eb | 2303 | int stretched; /* Have we stretched on this pass? */ |
252b5132 RH |
2304 | /* This is 'cuz stretch may be zero, when, in fact some piece of code |
2305 | grew, and another shrank. If a branch instruction doesn't fit anymore, | |
2306 | we could be scrod. */ | |
2307 | ||
2308 | do | |
2309 | { | |
e46d99eb AM |
2310 | stretch = 0; |
2311 | stretched = 0; | |
58a77e41 | 2312 | |
252b5132 RH |
2313 | for (fragP = segment_frag_root; fragP; fragP = fragP->fr_next) |
2314 | { | |
2315 | long growth = 0; | |
2316 | addressT was_address; | |
2317 | offsetT offset; | |
2318 | symbolS *symbolP; | |
2319 | ||
38686296 | 2320 | fragP->relax_marker ^= 1; |
252b5132 RH |
2321 | was_address = fragP->fr_address; |
2322 | address = fragP->fr_address += stretch; | |
2323 | symbolP = fragP->fr_symbol; | |
2324 | offset = fragP->fr_offset; | |
2325 | ||
2326 | switch (fragP->fr_type) | |
2327 | { | |
efaf0ba4 | 2328 | case rs_fill: /* .fill never relaxes. */ |
252b5132 RH |
2329 | growth = 0; |
2330 | break; | |
2331 | ||
2332 | #ifndef WORKING_DOT_WORD | |
2333 | /* JF: This is RMS's idea. I do *NOT* want to be blamed | |
2334 | for it I do not want to write it. I do not want to have | |
2335 | anything to do with it. This is not the proper way to | |
2336 | implement this misfeature. */ | |
2337 | case rs_broken_word: | |
2338 | { | |
2339 | struct broken_word *lie; | |
2340 | struct broken_word *untruth; | |
2341 | ||
2342 | /* Yes this is ugly (storing the broken_word pointer | |
2343 | in the symbol slot). Still, this whole chunk of | |
2344 | code is ugly, and I don't feel like doing anything | |
2345 | about it. Think of it as stubbornness in action. */ | |
2346 | growth = 0; | |
2347 | for (lie = (struct broken_word *) (fragP->fr_symbol); | |
2348 | lie && lie->dispfrag == fragP; | |
2349 | lie = lie->next_broken_word) | |
2350 | { | |
2351 | ||
2352 | if (lie->added) | |
2353 | continue; | |
2354 | ||
ac62c346 | 2355 | offset = (S_GET_VALUE (lie->add) |
252b5132 | 2356 | + lie->addnum |
ac62c346 | 2357 | - S_GET_VALUE (lie->sub)); |
252b5132 RH |
2358 | if (offset <= -32768 || offset >= 32767) |
2359 | { | |
2360 | if (flag_warn_displacement) | |
2361 | { | |
2362 | char buf[50]; | |
2363 | sprint_value (buf, (addressT) lie->addnum); | |
54d3cad9 AM |
2364 | as_warn_where (fragP->fr_file, fragP->fr_line, |
2365 | _(".word %s-%s+%s didn't fit"), | |
2366 | S_GET_NAME (lie->add), | |
2367 | S_GET_NAME (lie->sub), | |
2368 | buf); | |
252b5132 RH |
2369 | } |
2370 | lie->added = 1; | |
2371 | if (fragP->fr_subtype == 0) | |
2372 | { | |
2373 | fragP->fr_subtype++; | |
2374 | growth += md_short_jump_size; | |
2375 | } | |
2376 | for (untruth = lie->next_broken_word; | |
2377 | untruth && untruth->dispfrag == lie->dispfrag; | |
2378 | untruth = untruth->next_broken_word) | |
49309057 ILT |
2379 | if ((symbol_get_frag (untruth->add) |
2380 | == symbol_get_frag (lie->add)) | |
2381 | && (S_GET_VALUE (untruth->add) | |
2382 | == S_GET_VALUE (lie->add))) | |
252b5132 RH |
2383 | { |
2384 | untruth->added = 2; | |
2385 | untruth->use_jump = lie; | |
2386 | } | |
2387 | growth += md_long_jump_size; | |
2388 | } | |
2389 | } | |
2390 | ||
2391 | break; | |
efaf0ba4 | 2392 | } /* case rs_broken_word */ |
252b5132 RH |
2393 | #endif |
2394 | case rs_align: | |
2395 | case rs_align_code: | |
0a9ef439 | 2396 | case rs_align_test: |
252b5132 RH |
2397 | { |
2398 | addressT oldoff, newoff; | |
2399 | ||
2400 | oldoff = relax_align (was_address + fragP->fr_fix, | |
2401 | (int) offset); | |
2402 | newoff = relax_align (address + fragP->fr_fix, | |
2403 | (int) offset); | |
2404 | ||
2405 | if (fragP->fr_subtype != 0) | |
2406 | { | |
2407 | if (oldoff > fragP->fr_subtype) | |
2408 | oldoff = 0; | |
2409 | if (newoff > fragP->fr_subtype) | |
2410 | newoff = 0; | |
2411 | } | |
2412 | ||
2413 | growth = newoff - oldoff; | |
2414 | } | |
2415 | break; | |
2416 | ||
2417 | case rs_org: | |
2418 | { | |
e46d99eb AM |
2419 | addressT target = offset; |
2420 | addressT after; | |
252b5132 RH |
2421 | |
2422 | if (symbolP) | |
2423 | { | |
2424 | #if !defined (MANY_SEGMENTS) && !defined (BFD_ASSEMBLER) | |
2425 | know ((S_GET_SEGMENT (symbolP) == SEG_ABSOLUTE) | |
2426 | || (S_GET_SEGMENT (symbolP) == SEG_DATA) | |
2427 | || (S_GET_SEGMENT (symbolP) == SEG_TEXT) | |
2428 | || S_GET_SEGMENT (symbolP) == SEG_BSS); | |
2429 | know (symbolP->sy_frag); | |
2430 | know (!(S_GET_SEGMENT (symbolP) == SEG_ABSOLUTE) | |
2431 | || (symbolP->sy_frag == &zero_address_frag)); | |
2432 | #endif | |
ac62c346 AM |
2433 | target += S_GET_VALUE (symbolP); |
2434 | } | |
252b5132 RH |
2435 | |
2436 | know (fragP->fr_next); | |
2437 | after = fragP->fr_next->fr_address; | |
2438 | growth = target - after; | |
2439 | if (growth < 0) | |
2440 | { | |
2441 | /* Growth may be negative, but variable part of frag | |
2442 | cannot have fewer than 0 chars. That is, we can't | |
efaf0ba4 | 2443 | .org backwards. */ |
14ad458a | 2444 | as_bad_where (fragP->fr_file, fragP->fr_line, |
0e389e77 | 2445 | _("attempt to .org backwards")); |
14ad458a ILT |
2446 | |
2447 | /* We've issued an error message. Change the | |
2448 | frag to avoid cascading errors. */ | |
2449 | fragP->fr_type = rs_align; | |
2450 | fragP->fr_subtype = 0; | |
2451 | fragP->fr_offset = 0; | |
2452 | fragP->fr_fix = after - address; | |
2453 | growth = stretch; | |
252b5132 RH |
2454 | } |
2455 | ||
efaf0ba4 NC |
2456 | /* This is an absolute growth factor */ |
2457 | growth -= stretch; | |
252b5132 RH |
2458 | break; |
2459 | } | |
2460 | ||
2461 | case rs_space: | |
54d3cad9 | 2462 | growth = 0; |
252b5132 RH |
2463 | if (symbolP) |
2464 | { | |
766c03c9 AM |
2465 | offsetT amount; |
2466 | ||
2467 | amount = S_GET_VALUE (symbolP); | |
9e40345d | 2468 | if (S_GET_SEGMENT (symbolP) != absolute_section |
252b5132 RH |
2469 | || S_IS_COMMON (symbolP) |
2470 | || ! S_IS_DEFINED (symbolP)) | |
252b5132 | 2471 | { |
54d3cad9 AM |
2472 | as_bad_where (fragP->fr_file, fragP->fr_line, |
2473 | _(".space specifies non-absolute value")); | |
2474 | /* Prevent repeat of this error message. */ | |
2475 | fragP->fr_symbol = 0; | |
2476 | } | |
2477 | else if (amount < 0) | |
2478 | { | |
2479 | as_warn_where (fragP->fr_file, fragP->fr_line, | |
2480 | _(".space or .fill with negative value, ignored")); | |
766c03c9 | 2481 | fragP->fr_symbol = 0; |
252b5132 | 2482 | } |
54d3cad9 | 2483 | else |
050be34e | 2484 | growth = (was_address + fragP->fr_fix + amount |
54d3cad9 | 2485 | - fragP->fr_next->fr_address); |
252b5132 | 2486 | } |
252b5132 RH |
2487 | break; |
2488 | ||
2489 | case rs_machine_dependent: | |
2490 | #ifdef md_relax_frag | |
c842b53a | 2491 | growth = md_relax_frag (segment, fragP, stretch); |
252b5132 RH |
2492 | #else |
2493 | #ifdef TC_GENERIC_RELAX_TABLE | |
2494 | /* The default way to relax a frag is to look through | |
2495 | TC_GENERIC_RELAX_TABLE. */ | |
c842b53a | 2496 | growth = relax_frag (segment, fragP, stretch); |
efaf0ba4 | 2497 | #endif /* TC_GENERIC_RELAX_TABLE */ |
252b5132 RH |
2498 | #endif |
2499 | break; | |
2500 | ||
2501 | case rs_leb128: | |
2502 | { | |
2503 | valueT value; | |
2504 | int size; | |
2505 | ||
6386f3a7 | 2506 | value = resolve_symbol_value (fragP->fr_symbol); |
252b5132 RH |
2507 | size = sizeof_leb128 (value, fragP->fr_subtype); |
2508 | growth = size - fragP->fr_offset; | |
2509 | fragP->fr_offset = size; | |
2510 | } | |
2511 | break; | |
2512 | ||
2513 | case rs_cfa: | |
2514 | growth = eh_frame_relax_frag (fragP); | |
2515 | break; | |
2516 | ||
220e750f RH |
2517 | case rs_dwarf2dbg: |
2518 | growth = dwarf2dbg_relax_frag (fragP); | |
2519 | break; | |
2520 | ||
252b5132 RH |
2521 | default: |
2522 | BAD_CASE (fragP->fr_type); | |
2523 | break; | |
2524 | } | |
2525 | if (growth) | |
2526 | { | |
2527 | stretch += growth; | |
e46d99eb | 2528 | stretched = 1; |
252b5132 | 2529 | } |
efaf0ba4 | 2530 | } /* For each frag in the segment. */ |
252b5132 | 2531 | } |
efaf0ba4 NC |
2532 | while (stretched); /* Until nothing further to relax. */ |
2533 | } /* do_relax */ | |
252b5132 | 2534 | |
e46d99eb AM |
2535 | ret = 0; |
2536 | for (fragP = segment_frag_root; fragP; fragP = fragP->fr_next) | |
2537 | if (fragP->last_fr_address != fragP->fr_address) | |
2538 | { | |
2539 | fragP->last_fr_address = fragP->fr_address; | |
2540 | ret = 1; | |
2541 | } | |
2542 | return ret; | |
efaf0ba4 | 2543 | } |
252b5132 RH |
2544 | |
2545 | #if defined (BFD_ASSEMBLER) || (!defined (BFD) && !defined (OBJ_VMS)) | |
2546 | ||
2547 | #ifndef TC_RELOC_RTSYM_LOC_FIXUP | |
2548 | #define TC_RELOC_RTSYM_LOC_FIXUP(X) (1) | |
2549 | #endif | |
2550 | ||
2551 | /* fixup_segment() | |
2552 | ||
2553 | Go through all the fixS's in a segment and see which ones can be | |
2554 | handled now. (These consist of fixS where we have since discovered | |
2555 | the value of a symbol, or the address of the frag involved.) | |
2556 | For each one, call md_apply_fix to put the fix into the frag data. | |
2557 | ||
2558 | Result is a count of how many relocation structs will be needed to | |
2559 | handle the remaining fixS's that we couldn't completely handle here. | |
2560 | These will be output later by emit_relocations(). */ | |
2561 | ||
2562 | static long | |
2563 | fixup_segment (fixP, this_segment_type) | |
2564 | register fixS *fixP; | |
efaf0ba4 | 2565 | segT this_segment_type; /* N_TYPE bits for segment. */ |
252b5132 RH |
2566 | { |
2567 | long seg_reloc_count = 0; | |
2568 | symbolS *add_symbolP; | |
2569 | symbolS *sub_symbolP; | |
2570 | valueT add_number; | |
2571 | int size; | |
2572 | char *place; | |
2573 | long where; | |
2574 | int pcrel, plt; | |
2575 | fragS *fragP; | |
2576 | segT add_symbol_segment = absolute_section; | |
2577 | ||
2578 | /* If the linker is doing the relaxing, we must not do any fixups. | |
2579 | ||
2580 | Well, strictly speaking that's not true -- we could do any that are | |
2581 | PC-relative and don't cross regions that could change size. And for the | |
2582 | i960 (the only machine for which we've got a relaxing linker right now), | |
2583 | we might be able to turn callx/callj into bal anyways in cases where we | |
2584 | know the maximum displacement. */ | |
58a77e41 | 2585 | if (linkrelax && TC_LINKRELAX_FIXUP (this_segment_type)) |
252b5132 RH |
2586 | { |
2587 | for (; fixP; fixP = fixP->fx_next) | |
2588 | seg_reloc_count++; | |
2589 | TC_ADJUST_RELOC_COUNT (fixP, seg_reloc_count); | |
2590 | return seg_reloc_count; | |
2591 | } | |
2592 | ||
2593 | for (; fixP; fixP = fixP->fx_next) | |
2594 | { | |
252b5132 RH |
2595 | #ifdef DEBUG5 |
2596 | fprintf (stderr, "\nprocessing fixup:\n"); | |
2597 | print_fixup (fixP); | |
2598 | #endif | |
2599 | ||
252b5132 RH |
2600 | fragP = fixP->fx_frag; |
2601 | know (fragP); | |
2602 | where = fixP->fx_where; | |
2603 | place = fragP->fr_literal + where; | |
2604 | size = fixP->fx_size; | |
2605 | add_symbolP = fixP->fx_addsy; | |
2606 | #ifdef TC_VALIDATE_FIX | |
2607 | TC_VALIDATE_FIX (fixP, this_segment_type, skip); | |
2608 | #endif | |
2609 | sub_symbolP = fixP->fx_subsy; | |
2610 | add_number = fixP->fx_offset; | |
2611 | pcrel = fixP->fx_pcrel; | |
2612 | plt = fixP->fx_plt; | |
2613 | ||
2614 | if (add_symbolP != NULL | |
49309057 | 2615 | && symbol_mri_common_p (add_symbolP)) |
252b5132 RH |
2616 | { |
2617 | know (add_symbolP->sy_value.X_op == O_symbol); | |
2618 | add_number += S_GET_VALUE (add_symbolP); | |
2619 | fixP->fx_offset = add_number; | |
49309057 ILT |
2620 | add_symbolP = fixP->fx_addsy = |
2621 | symbol_get_value_expression (add_symbolP)->X_add_symbol; | |
252b5132 RH |
2622 | } |
2623 | ||
2624 | if (add_symbolP) | |
2625 | add_symbol_segment = S_GET_SEGMENT (add_symbolP); | |
2626 | ||
2627 | if (sub_symbolP) | |
2628 | { | |
6386f3a7 | 2629 | resolve_symbol_value (sub_symbolP); |
252b5132 RH |
2630 | if (add_symbolP == NULL || add_symbol_segment == absolute_section) |
2631 | { | |
2632 | if (add_symbolP != NULL) | |
2633 | { | |
2634 | add_number += S_GET_VALUE (add_symbolP); | |
2635 | add_symbolP = NULL; | |
2636 | fixP->fx_addsy = NULL; | |
2637 | } | |
2638 | ||
efaf0ba4 | 2639 | /* It's just -sym. */ |
252b5132 RH |
2640 | if (S_GET_SEGMENT (sub_symbolP) == absolute_section) |
2641 | { | |
2642 | add_number -= S_GET_VALUE (sub_symbolP); | |
2643 | fixP->fx_subsy = NULL; | |
2644 | } | |
2645 | else if (pcrel | |
2646 | && S_GET_SEGMENT (sub_symbolP) == this_segment_type) | |
2647 | { | |
2648 | /* Should try converting to a constant. */ | |
2649 | goto bad_sub_reloc; | |
2650 | } | |
2651 | else | |
2652 | bad_sub_reloc: | |
2653 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
0e389e77 | 2654 | _("negative of non-absolute symbol `%s'"), |
252b5132 RH |
2655 | S_GET_NAME (sub_symbolP)); |
2656 | } | |
2657 | else if (S_GET_SEGMENT (sub_symbolP) == add_symbol_segment | |
2658 | && SEG_NORMAL (add_symbol_segment)) | |
2659 | { | |
2660 | /* Difference of 2 symbols from same segment. | |
2661 | Can't make difference of 2 undefineds: 'value' means | |
efaf0ba4 | 2662 | something different for N_UNDF. */ |
252b5132 RH |
2663 | #ifdef TC_I960 |
2664 | /* Makes no sense to use the difference of 2 arbitrary symbols | |
2665 | as the target of a call instruction. */ | |
2666 | if (fixP->fx_tcbit) | |
2667 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
0e389e77 | 2668 | _("callj to difference of two symbols")); |
efaf0ba4 | 2669 | #endif /* TC_I960 */ |
d48019e0 AM |
2670 | add_number += (S_GET_VALUE (add_symbolP) |
2671 | - S_GET_VALUE (sub_symbolP)); | |
1a16aca4 AM |
2672 | if (1 |
2673 | #ifdef TC_M68K | |
2674 | /* See the comment below about 68k weirdness. */ | |
2675 | && 0 | |
2676 | #endif | |
2677 | && pcrel) | |
d48019e0 | 2678 | add_number -= MD_PCREL_FROM_SECTION (fixP, this_segment_type); |
252b5132 RH |
2679 | |
2680 | add_symbolP = NULL; | |
efaf0ba4 | 2681 | pcrel = 0; /* No further pcrel processing. */ |
252b5132 RH |
2682 | |
2683 | /* Let the target machine make the final determination | |
2684 | as to whether or not a relocation will be needed to | |
2685 | handle this fixup. */ | |
2686 | if (!TC_FORCE_RELOCATION_SECTION (fixP, this_segment_type)) | |
2687 | { | |
2688 | fixP->fx_pcrel = 0; | |
2689 | fixP->fx_addsy = NULL; | |
2690 | fixP->fx_subsy = NULL; | |
2691 | } | |
2692 | } | |
2693 | else | |
2694 | { | |
efaf0ba4 | 2695 | /* Different segments in subtraction. */ |
252b5132 RH |
2696 | know (!(S_IS_EXTERNAL (sub_symbolP) |
2697 | && (S_GET_SEGMENT (sub_symbolP) == absolute_section))); | |
2698 | ||
2699 | if ((S_GET_SEGMENT (sub_symbolP) == absolute_section)) | |
2700 | add_number -= S_GET_VALUE (sub_symbolP); | |
2701 | ||
2702 | #ifdef DIFF_EXPR_OK | |
1a16aca4 | 2703 | else if (S_GET_SEGMENT (sub_symbolP) == this_segment_type) |
252b5132 RH |
2704 | { |
2705 | /* Make it pc-relative. */ | |
1a16aca4 AM |
2706 | if (0 |
2707 | #ifdef TC_M68K | |
2708 | /* Do this for m68k even if it's already described | |
2709 | as pc-relative. On the m68k, an operand of | |
2710 | "pc@(foo-.-2)" should address "foo" in a | |
2711 | pc-relative mode. */ | |
2712 | || 1 | |
2713 | #endif | |
2714 | || !pcrel) | |
2715 | { | |
2716 | add_number += MD_PCREL_FROM_SECTION (fixP, | |
2717 | this_segment_type); | |
2718 | pcrel = 1; | |
2719 | fixP->fx_pcrel = 1; | |
2720 | } | |
2721 | ||
2722 | add_number -= S_GET_VALUE (sub_symbolP); | |
252b5132 RH |
2723 | sub_symbolP = 0; |
2724 | fixP->fx_subsy = 0; | |
2725 | } | |
2726 | #endif | |
2727 | #ifdef UNDEFINED_DIFFERENCE_OK | |
2728 | /* The PA needs this for PIC code generation. We basically | |
2729 | don't want to do anything if we have the difference of two | |
2730 | symbols at this point. */ | |
2731 | else if (1) | |
2732 | { | |
2733 | /* Leave it alone. */ | |
2734 | } | |
2735 | #endif | |
2736 | #ifdef BFD_ASSEMBLER | |
2737 | else if (fixP->fx_r_type == BFD_RELOC_GPREL32 | |
2738 | || fixP->fx_r_type == BFD_RELOC_GPREL16) | |
2739 | { | |
2740 | /* Leave it alone. */ | |
2741 | } | |
2742 | #endif | |
2743 | else | |
2744 | { | |
2745 | char buf[50]; | |
2746 | sprint_value (buf, fragP->fr_address + where); | |
2747 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
0e389e77 | 2748 | _("subtraction of two symbols in different sections `%s' {%s section} - `%s' {%s section} at file address %s"), |
252b5132 RH |
2749 | S_GET_NAME (add_symbolP), |
2750 | segment_name (S_GET_SEGMENT (add_symbolP)), | |
2751 | S_GET_NAME (sub_symbolP), | |
2752 | segment_name (S_GET_SEGMENT (sub_symbolP)), | |
2753 | buf); | |
2754 | } | |
2755 | } | |
2756 | } | |
2757 | ||
2758 | if (add_symbolP) | |
2759 | { | |
2760 | if (add_symbol_segment == this_segment_type && pcrel && !plt | |
2761 | && TC_RELOC_RTSYM_LOC_FIXUP (fixP)) | |
2762 | { | |
efaf0ba4 NC |
2763 | /* This fixup was made when the symbol's segment was |
2764 | SEG_UNKNOWN, but it is now in the local segment. | |
2765 | So we know how to do the address without relocation. */ | |
252b5132 RH |
2766 | #ifdef TC_I960 |
2767 | /* reloc_callj() may replace a 'call' with a 'calls' or a | |
2768 | 'bal', in which cases it modifies *fixP as appropriate. | |
2769 | In the case of a 'calls', no further work is required, | |
2770 | and *fixP has been set up to make the rest of the code | |
efaf0ba4 | 2771 | below a no-op. */ |
252b5132 | 2772 | reloc_callj (fixP); |
efaf0ba4 | 2773 | #endif /* TC_I960 */ |
252b5132 RH |
2774 | |
2775 | add_number += S_GET_VALUE (add_symbolP); | |
2776 | add_number -= MD_PCREL_FROM_SECTION (fixP, this_segment_type); | |
efaf0ba4 NC |
2777 | /* Lie. Don't want further pcrel processing. */ |
2778 | pcrel = 0; | |
252b5132 RH |
2779 | |
2780 | /* Let the target machine make the final determination | |
2781 | as to whether or not a relocation will be needed to | |
2782 | handle this fixup. */ | |
2783 | if (!TC_FORCE_RELOCATION (fixP)) | |
2784 | { | |
2785 | fixP->fx_pcrel = 0; | |
2786 | fixP->fx_addsy = NULL; | |
2787 | } | |
2788 | } | |
2789 | else | |
2790 | { | |
2791 | if (add_symbol_segment == absolute_section | |
2792 | && ! pcrel) | |
2793 | { | |
2794 | #ifdef TC_I960 | |
2795 | /* See comment about reloc_callj() above. */ | |
2796 | reloc_callj (fixP); | |
efaf0ba4 | 2797 | #endif /* TC_I960 */ |
252b5132 RH |
2798 | add_number += S_GET_VALUE (add_symbolP); |
2799 | ||
2800 | /* Let the target machine make the final determination | |
2801 | as to whether or not a relocation will be needed to | |
2802 | handle this fixup. */ | |
2803 | ||
2804 | if (!TC_FORCE_RELOCATION (fixP)) | |
2805 | { | |
2806 | fixP->fx_addsy = NULL; | |
2807 | add_symbolP = NULL; | |
2808 | } | |
2809 | } | |
2810 | else if (add_symbol_segment == undefined_section | |
2811 | #ifdef BFD_ASSEMBLER | |
2812 | || bfd_is_com_section (add_symbol_segment) | |
7e9250a3 HPN |
2813 | || (bfd_get_section_flags (stdoutput, |
2814 | add_symbol_segment) | |
2815 | & SEC_MERGE) != 0 | |
252b5132 RH |
2816 | #endif |
2817 | ) | |
2818 | { | |
2819 | #ifdef TC_I960 | |
2820 | if ((int) fixP->fx_bit_fixP == 13) | |
2821 | { | |
2822 | /* This is a COBR instruction. They have only a | |
efaf0ba4 NC |
2823 | 13-bit displacement and are only to be used |
2824 | for local branches: flag as error, don't generate | |
2825 | relocation. */ | |
252b5132 RH |
2826 | as_bad_where (fixP->fx_file, fixP->fx_line, |
2827 | _("can't use COBR format with external label")); | |
2828 | fixP->fx_addsy = NULL; | |
2829 | fixP->fx_done = 1; | |
2830 | continue; | |
efaf0ba4 NC |
2831 | } /* COBR. */ |
2832 | #endif /* TC_I960 */ | |
252b5132 RH |
2833 | |
2834 | #ifdef OBJ_COFF | |
2835 | #ifdef TE_I386AIX | |
2836 | if (S_IS_COMMON (add_symbolP)) | |
2837 | add_number += S_GET_VALUE (add_symbolP); | |
efaf0ba4 NC |
2838 | #endif /* TE_I386AIX */ |
2839 | #endif /* OBJ_COFF */ | |
252b5132 RH |
2840 | ++seg_reloc_count; |
2841 | } | |
2842 | else | |
2843 | { | |
2844 | seg_reloc_count++; | |
8f36cd18 | 2845 | if (TC_FIX_ADJUSTABLE (fixP)) |
02198638 | 2846 | add_number += S_GET_VALUE (add_symbolP); |
252b5132 RH |
2847 | } |
2848 | } | |
2849 | } | |
2850 | ||
2851 | if (pcrel) | |
2852 | { | |
2853 | add_number -= MD_PCREL_FROM_SECTION (fixP, this_segment_type); | |
2854 | if (add_symbolP == 0) | |
2855 | { | |
2856 | #ifndef BFD_ASSEMBLER | |
2857 | fixP->fx_addsy = &abs_symbol; | |
2858 | #else | |
2859 | fixP->fx_addsy = section_symbol (absolute_section); | |
2860 | #endif | |
49309057 | 2861 | symbol_mark_used_in_reloc (fixP->fx_addsy); |
252b5132 RH |
2862 | ++seg_reloc_count; |
2863 | } | |
2864 | } | |
2865 | ||
6d4d30bb AM |
2866 | if (!fixP->fx_done) |
2867 | { | |
2868 | #ifdef MD_APPLY_FIX3 | |
2869 | md_apply_fix3 (fixP, &add_number, this_segment_type); | |
2870 | #else | |
2871 | #ifdef BFD_ASSEMBLER | |
2872 | md_apply_fix (fixP, &add_number); | |
2873 | #else | |
2874 | md_apply_fix (fixP, add_number); | |
2875 | #endif | |
2876 | #endif | |
2877 | ||
2878 | #ifndef TC_HANDLES_FX_DONE | |
2879 | /* If the tc-* files haven't been converted, assume it's handling | |
2880 | it the old way, where a null fx_addsy means that the fix has | |
2881 | been applied completely, and no further work is needed. */ | |
2882 | if (fixP->fx_addsy == 0 && fixP->fx_pcrel == 0) | |
2883 | fixP->fx_done = 1; | |
2884 | #endif | |
2885 | } | |
2886 | ||
252b5132 RH |
2887 | if (!fixP->fx_bit_fixP && !fixP->fx_no_overflow && size > 0) |
2888 | { | |
2889 | if ((size_t) size < sizeof (valueT)) | |
2890 | { | |
b77ad1d4 | 2891 | valueT mask; |
252b5132 | 2892 | |
252b5132 | 2893 | mask = 0; |
efaf0ba4 | 2894 | mask--; /* Set all bits to one. */ |
b77ad1d4 AM |
2895 | mask <<= size * 8 - (fixP->fx_signed ? 1 : 0); |
2896 | if ((add_number & mask) != 0 && (add_number & mask) != mask) | |
252b5132 RH |
2897 | { |
2898 | char buf[50], buf2[50]; | |
2899 | sprint_value (buf, fragP->fr_address + where); | |
2900 | if (add_number > 1000) | |
2901 | sprint_value (buf2, add_number); | |
2902 | else | |
2903 | sprintf (buf2, "%ld", (long) add_number); | |
2904 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
0e389e77 | 2905 | _("value of %s too large for field of %d bytes at %s"), |
252b5132 | 2906 | buf2, size, buf); |
efaf0ba4 | 2907 | } /* Generic error checking. */ |
252b5132 RH |
2908 | } |
2909 | #ifdef WARN_SIGNED_OVERFLOW_WORD | |
2910 | /* Warn if a .word value is too large when treated as a signed | |
2911 | number. We already know it is not too negative. This is to | |
2912 | catch over-large switches generated by gcc on the 68k. */ | |
2913 | if (!flag_signed_overflow_ok | |
2914 | && size == 2 | |
2915 | && add_number > 0x7fff) | |
2916 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
0e389e77 | 2917 | _("signed .word overflow; switch may be too large; %ld at 0x%lx"), |
252b5132 RH |
2918 | (long) add_number, |
2919 | (unsigned long) (fragP->fr_address + where)); | |
2920 | #endif | |
efaf0ba4 | 2921 | } /* Not a bit fix. */ |
252b5132 | 2922 | |
252b5132 | 2923 | #ifdef TC_VALIDATE_FIX |
ab9da554 ILT |
2924 | skip: ATTRIBUTE_UNUSED_LABEL |
2925 | ; | |
252b5132 RH |
2926 | #endif |
2927 | #ifdef DEBUG5 | |
2928 | fprintf (stderr, "result:\n"); | |
2929 | print_fixup (fixP); | |
2930 | #endif | |
efaf0ba4 | 2931 | } /* For each fixS in this segment. */ |
252b5132 RH |
2932 | |
2933 | TC_ADJUST_RELOC_COUNT (fixP, seg_reloc_count); | |
2934 | return seg_reloc_count; | |
2935 | } | |
2936 | ||
2937 | #endif /* defined (BFD_ASSEMBLER) || (!defined (BFD) && !defined (OBJ_VMS)) */ | |
2938 | ||
2939 | void | |
2940 | number_to_chars_bigendian (buf, val, n) | |
2941 | char *buf; | |
2942 | valueT val; | |
2943 | int n; | |
2944 | { | |
2945 | if ((size_t) n > sizeof (val) || n <= 0) | |
2946 | abort (); | |
2947 | while (n--) | |
2948 | { | |
2949 | buf[n] = val & 0xff; | |
2950 | val >>= 8; | |
2951 | } | |
2952 | } | |
2953 | ||
2954 | void | |
2955 | number_to_chars_littleendian (buf, val, n) | |
2956 | char *buf; | |
2957 | valueT val; | |
2958 | int n; | |
2959 | { | |
2960 | if ((size_t) n > sizeof (val) || n <= 0) | |
2961 | abort (); | |
2962 | while (n--) | |
2963 | { | |
2964 | *buf++ = val & 0xff; | |
2965 | val >>= 8; | |
2966 | } | |
2967 | } | |
2968 | ||
2969 | void | |
2970 | write_print_statistics (file) | |
2971 | FILE *file; | |
2972 | { | |
6d4d30bb | 2973 | fprintf (file, "fixups: %d\n", n_fixups); |
252b5132 RH |
2974 | } |
2975 | ||
efaf0ba4 | 2976 | /* For debugging. */ |
252b5132 RH |
2977 | extern int indent_level; |
2978 | ||
2979 | void | |
2980 | print_fixup (fixp) | |
2981 | fixS *fixp; | |
2982 | { | |
2983 | indent_level = 1; | |
2984 | fprintf (stderr, "fix %lx %s:%d", (long) fixp, fixp->fx_file, fixp->fx_line); | |
2985 | if (fixp->fx_pcrel) | |
2986 | fprintf (stderr, " pcrel"); | |
2987 | if (fixp->fx_pcrel_adjust) | |
2988 | fprintf (stderr, " pcrel_adjust=%d", fixp->fx_pcrel_adjust); | |
2989 | if (fixp->fx_im_disp) | |
2990 | { | |
2991 | #ifdef TC_NS32K | |
2992 | fprintf (stderr, " im_disp=%d", fixp->fx_im_disp); | |
2993 | #else | |
2994 | fprintf (stderr, " im_disp"); | |
2995 | #endif | |
2996 | } | |
2997 | if (fixp->fx_tcbit) | |
2998 | fprintf (stderr, " tcbit"); | |
2999 | if (fixp->fx_done) | |
3000 | fprintf (stderr, " done"); | |
3001 | fprintf (stderr, "\n size=%d frag=%lx where=%ld offset=%lx addnumber=%lx", | |
3002 | fixp->fx_size, (long) fixp->fx_frag, (long) fixp->fx_where, | |
3003 | (long) fixp->fx_offset, (long) fixp->fx_addnumber); | |
3004 | #ifdef BFD_ASSEMBLER | |
3005 | fprintf (stderr, "\n %s (%d)", bfd_get_reloc_code_name (fixp->fx_r_type), | |
3006 | fixp->fx_r_type); | |
3007 | #else | |
3008 | #ifdef NEED_FX_R_TYPE | |
3009 | fprintf (stderr, " r_type=%d", fixp->fx_r_type); | |
3010 | #endif | |
3011 | #endif | |
3012 | if (fixp->fx_addsy) | |
3013 | { | |
3014 | fprintf (stderr, "\n +<"); | |
3015 | print_symbol_value_1 (stderr, fixp->fx_addsy); | |
3016 | fprintf (stderr, ">"); | |
3017 | } | |
3018 | if (fixp->fx_subsy) | |
3019 | { | |
3020 | fprintf (stderr, "\n -<"); | |
3021 | print_symbol_value_1 (stderr, fixp->fx_subsy); | |
3022 | fprintf (stderr, ">"); | |
3023 | } | |
3024 | fprintf (stderr, "\n"); | |
3025 | #ifdef TC_FIX_DATA_PRINT | |
3026 | TC_FIX_DATA_PRINT (stderr, fixp); | |
3027 | #endif | |
3028 | } |