Commit | Line | Data |
---|---|---|
fecd2382 | 1 | /* write.c - emit .o file |
98c6bbbe | 2 | Copyright (C) 1986, 87, 90, 91, 92, 93, 1994 Free Software Foundation, Inc. |
6efd877d | 3 | |
a39116f1 | 4 | This file is part of GAS, the GNU Assembler. |
6efd877d | 5 | |
a39116f1 RP |
6 | GAS is free software; you can redistribute it and/or modify |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 2, or (at your option) | |
9 | any later version. | |
6efd877d | 10 | |
a39116f1 RP |
11 | GAS is distributed in the hope that it will be useful, |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
6efd877d | 15 | |
a39116f1 RP |
16 | You should have received a copy of the GNU General Public License |
17 | along with GAS; see the file COPYING. If not, write to | |
18 | the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
fecd2382 | 19 | |
c593cf41 | 20 | /* This thing should be set up to do byteordering correctly. But... */ |
fecd2382 RP |
21 | |
22 | #include "as.h" | |
fecd2382 RP |
23 | #include "subsegs.h" |
24 | #include "obstack.h" | |
25 | #include "output-file.h" | |
26 | ||
d9d6f094 KR |
27 | /* This looks like a good idea. Let's try turning it on always, for now. */ |
28 | #undef BFD_FAST_SECTION_FILL | |
29 | #define BFD_FAST_SECTION_FILL | |
30 | ||
43ca9aa6 KR |
31 | /* The NOP_OPCODE is for the alignment fill value. Fill it with a nop |
32 | instruction so that the disassembler does not choke on it. */ | |
6d5460ab RP |
33 | #ifndef NOP_OPCODE |
34 | #define NOP_OPCODE 0x00 | |
35 | #endif | |
36 | ||
f5c32424 KR |
37 | #ifndef TC_ADJUST_RELOC_COUNT |
38 | #define TC_ADJUST_RELOC_COUNT(FIXP,COUNT) | |
39 | #endif | |
40 | ||
335d35c8 JL |
41 | #ifndef TC_FORCE_RELOCATION |
42 | #define TC_FORCE_RELOCATION(FIXP) 0 | |
43 | #endif | |
44 | ||
43ca9aa6 KR |
45 | #ifndef WORKING_DOT_WORD |
46 | extern CONST int md_short_jump_size; | |
47 | extern CONST int md_long_jump_size; | |
48 | #endif | |
49 | ||
1cf7548e | 50 | int symbol_table_frozen; |
a55774a1 | 51 | void print_fixup PARAMS ((fixS *)); |
1cf7548e | 52 | |
1b96bdce | 53 | #ifdef BFD_ASSEMBLER |
a55774a1 KR |
54 | static void renumber_sections PARAMS ((bfd *, asection *, PTR)); |
55 | ||
1b96bdce ILT |
56 | /* We generally attach relocs to frag chains. However, after we have |
57 | chained these all together into a segment, any relocs we add after | |
58 | that must be attached to a segment. This will include relocs added | |
59 | in md_estimate_size_for_relax, for example. */ | |
60 | static int frags_chained = 0; | |
61 | #endif | |
62 | ||
43ca9aa6 KR |
63 | #ifndef BFD_ASSEMBLER |
64 | ||
45432836 | 65 | #ifndef MANY_SEGMENTS |
09952cd9 KR |
66 | struct frag *text_frag_root; |
67 | struct frag *data_frag_root; | |
68 | struct frag *bss_frag_root; | |
fecd2382 | 69 | |
09952cd9 KR |
70 | struct frag *text_last_frag; /* Last frag in segment. */ |
71 | struct frag *data_last_frag; /* Last frag in segment. */ | |
65bfcf2e | 72 | static struct frag *bss_last_frag; /* Last frag in segment. */ |
45432836 | 73 | #endif |
fecd2382 | 74 | |
1cf7548e | 75 | #ifndef BFD |
fecd2382 | 76 | static object_headers headers; |
fecd2382 | 77 | static char *the_object_file; |
80aab579 ILT |
78 | #endif |
79 | ||
80 | long string_byte_count; | |
fecd2382 RP |
81 | char *next_object_file_charP; /* Tracks object file bytes. */ |
82 | ||
3eb802b5 | 83 | #ifndef OBJ_VMS |
fecd2382 | 84 | int magic_number_for_object_file = DEFAULT_MAGIC_NUMBER_FOR_OBJECT_FILE; |
3eb802b5 | 85 | #endif |
fecd2382 | 86 | |
43ca9aa6 KR |
87 | #endif /* BFD_ASSEMBLER */ |
88 | ||
7a0405b9 | 89 | #ifdef BFD_ASSEMBLER |
b23f6743 | 90 | static fixS *fix_new_internal PARAMS ((fragS *, int where, int size, |
5ac34ac3 ILT |
91 | symbolS *add, symbolS *sub, |
92 | offsetT offset, int pcrel, | |
7a0405b9 | 93 | bfd_reloc_code_real_type r_type)); |
5ac34ac3 | 94 | #else |
b23f6743 | 95 | static fixS *fix_new_internal PARAMS ((fragS *, int where, int size, |
7a0405b9 ILT |
96 | symbolS *add, symbolS *sub, |
97 | offsetT offset, int pcrel, | |
98 | int r_type)); | |
5ac34ac3 | 99 | #endif |
80aab579 | 100 | #if defined (BFD_ASSEMBLER) || !defined (BFD) |
6efd877d | 101 | static long fixup_segment PARAMS ((fixS * fixP, segT this_segment_type)); |
80aab579 | 102 | #endif |
d5364748 | 103 | static relax_addressT relax_align PARAMS ((relax_addressT addr, int align)); |
fecd2382 RP |
104 | |
105 | /* | |
106 | * fix_new() | |
107 | * | |
108 | * Create a fixS in obstack 'notes'. | |
109 | */ | |
5ac34ac3 ILT |
110 | static fixS * |
111 | fix_new_internal (frag, where, size, add_symbol, sub_symbol, offset, pcrel, | |
112 | r_type) | |
6efd877d KR |
113 | fragS *frag; /* Which frag? */ |
114 | int where; /* Where in that frag? */ | |
b23f6743 | 115 | int size; /* 1, 2, or 4 usually. */ |
6efd877d | 116 | symbolS *add_symbol; /* X_add_symbol. */ |
5ac34ac3 | 117 | symbolS *sub_symbol; /* X_op_symbol. */ |
d5364748 | 118 | offsetT offset; /* X_add_number. */ |
6efd877d | 119 | int pcrel; /* TRUE if PC-relative relocation. */ |
43ca9aa6 KR |
120 | #ifdef BFD_ASSEMBLER |
121 | bfd_reloc_code_real_type r_type; /* Relocation type */ | |
122 | #else | |
6efd877d | 123 | int r_type; /* Relocation type */ |
43ca9aa6 | 124 | #endif |
fecd2382 | 125 | { |
6efd877d KR |
126 | fixS *fixP; |
127 | ||
128 | fixP = (fixS *) obstack_alloc (¬es, sizeof (fixS)); | |
129 | ||
130 | fixP->fx_frag = frag; | |
131 | fixP->fx_where = where; | |
132 | fixP->fx_size = size; | |
133 | fixP->fx_addsy = add_symbol; | |
134 | fixP->fx_subsy = sub_symbol; | |
135 | fixP->fx_offset = offset; | |
136 | fixP->fx_pcrel = pcrel; | |
a55774a1 | 137 | fixP->fx_plt = 0; |
43ca9aa6 | 138 | #if defined(NEED_FX_R_TYPE) || defined (BFD_ASSEMBLER) |
6efd877d | 139 | fixP->fx_r_type = r_type; |
c593cf41 | 140 | #endif |
6efd877d KR |
141 | fixP->fx_im_disp = 0; |
142 | fixP->fx_pcrel_adjust = 0; | |
6efd877d | 143 | fixP->fx_bit_fixP = 0; |
43ca9aa6 | 144 | fixP->fx_addnumber = 0; |
20b39b6f | 145 | fixP->tc_fix_data = NULL; |
a58374d7 | 146 | fixP->fx_tcbit = 0; |
98c6bbbe | 147 | fixP->fx_done = 0; |
43ca9aa6 KR |
148 | |
149 | #ifdef TC_something | |
150 | fixP->fx_bsr = 0; | |
151 | #endif | |
43ca9aa6 | 152 | |
84fa9814 KR |
153 | as_where (&fixP->fx_file, &fixP->fx_line); |
154 | ||
43ca9aa6 KR |
155 | /* Usually, we want relocs sorted numerically, but while |
156 | comparing to older versions of gas that have relocs | |
157 | reverse sorted, it is convenient to have this compile | |
158 | time option. xoxorich. */ | |
159 | ||
160 | { | |
6efd877d | 161 | |
43ca9aa6 | 162 | #ifdef BFD_ASSEMBLER |
1b96bdce ILT |
163 | fixS **seg_fix_rootP = (frags_chained |
164 | ? &seg_info (now_seg)->fix_root | |
165 | : &frchain_now->fix_root); | |
166 | fixS **seg_fix_tailP = (frags_chained | |
167 | ? &seg_info (now_seg)->fix_tail | |
168 | : &frchain_now->fix_tail); | |
43ca9aa6 | 169 | #endif |
09952cd9 | 170 | |
f6e504fe | 171 | #ifdef REVERSE_SORT_RELOCS |
6efd877d | 172 | |
43ca9aa6 KR |
173 | fixP->fx_next = *seg_fix_rootP; |
174 | *seg_fix_rootP = fixP; | |
6efd877d | 175 | |
f6e504fe | 176 | #else /* REVERSE_SORT_RELOCS */ |
6efd877d | 177 | |
43ca9aa6 | 178 | fixP->fx_next = NULL; |
6efd877d | 179 | |
43ca9aa6 KR |
180 | if (*seg_fix_tailP) |
181 | (*seg_fix_tailP)->fx_next = fixP; | |
182 | else | |
183 | *seg_fix_rootP = fixP; | |
184 | *seg_fix_tailP = fixP; | |
6efd877d | 185 | |
f6e504fe | 186 | #endif /* REVERSE_SORT_RELOCS */ |
6efd877d | 187 | |
43ca9aa6 KR |
188 | } |
189 | ||
190 | return fixP; | |
191 | } | |
192 | ||
5ac34ac3 ILT |
193 | /* Create a fixup relative to a symbol (plus a constant). */ |
194 | ||
195 | fixS * | |
196 | fix_new (frag, where, size, add_symbol, offset, pcrel, r_type) | |
197 | fragS *frag; /* Which frag? */ | |
198 | int where; /* Where in that frag? */ | |
199 | short int size; /* 1, 2, or 4 usually. */ | |
200 | symbolS *add_symbol; /* X_add_symbol. */ | |
201 | offsetT offset; /* X_add_number. */ | |
202 | int pcrel; /* TRUE if PC-relative relocation. */ | |
203 | #ifdef BFD_ASSEMBLER | |
204 | bfd_reloc_code_real_type r_type; /* Relocation type */ | |
205 | #else | |
206 | int r_type; /* Relocation type */ | |
207 | #endif | |
208 | { | |
209 | return fix_new_internal (frag, where, size, add_symbol, | |
210 | (symbolS *) NULL, offset, pcrel, r_type); | |
211 | } | |
212 | ||
213 | /* Create a fixup for an expression. Currently we only support fixups | |
214 | for difference expressions. That is itself more than most object | |
215 | file formats support anyhow. */ | |
216 | ||
217 | fixS * | |
218 | fix_new_exp (frag, where, size, exp, pcrel, r_type) | |
219 | fragS *frag; /* Which frag? */ | |
220 | int where; /* Where in that frag? */ | |
221 | short int size; /* 1, 2, or 4 usually. */ | |
222 | expressionS *exp; /* Expression. */ | |
223 | int pcrel; /* TRUE if PC-relative relocation. */ | |
224 | #ifdef BFD_ASSEMBLER | |
225 | bfd_reloc_code_real_type r_type; /* Relocation type */ | |
226 | #else | |
227 | int r_type; /* Relocation type */ | |
228 | #endif | |
229 | { | |
230 | symbolS *add = NULL; | |
231 | symbolS *sub = NULL; | |
232 | offsetT off = 0; | |
233 | ||
234 | switch (exp->X_op) | |
235 | { | |
236 | case O_absent: | |
237 | break; | |
238 | ||
4acf8c78 KR |
239 | case O_add: |
240 | /* This comes up when _GLOBAL_OFFSET_TABLE_+(.-L0) is read, if | |
241 | the difference expression cannot immediately be reduced. */ | |
242 | { | |
243 | extern symbolS *make_expr_symbol (); | |
244 | symbolS *stmp = make_expr_symbol (exp); | |
245 | exp->X_op = O_symbol; | |
246 | exp->X_op_symbol = 0; | |
247 | exp->X_add_symbol = stmp; | |
248 | exp->X_add_number = 0; | |
249 | return fix_new_exp (frag, where, size, exp, pcrel, r_type); | |
250 | } | |
251 | ||
b23f6743 KR |
252 | case O_uminus: |
253 | sub = exp->X_add_symbol; | |
254 | off = exp->X_add_number; | |
255 | break; | |
256 | ||
5ac34ac3 ILT |
257 | case O_subtract: |
258 | sub = exp->X_op_symbol; | |
259 | /* Fall through. */ | |
260 | case O_symbol: | |
261 | add = exp->X_add_symbol; | |
262 | /* Fall through. */ | |
263 | case O_constant: | |
264 | off = exp->X_add_number; | |
265 | break; | |
266 | ||
267 | default: | |
268 | as_bad ("expression too complex for fixup"); | |
269 | } | |
270 | ||
271 | return fix_new_internal (frag, where, size, add, sub, off, | |
272 | pcrel, r_type); | |
273 | } | |
274 | ||
43ca9aa6 KR |
275 | /* Append a string onto another string, bumping the pointer along. */ |
276 | void | |
277 | append (charPP, fromP, length) | |
278 | char **charPP; | |
279 | char *fromP; | |
280 | unsigned long length; | |
281 | { | |
282 | /* Don't trust memcpy() of 0 chars. */ | |
283 | if (length == 0) | |
284 | return; | |
285 | ||
80aab579 | 286 | memcpy (*charPP, fromP, length); |
43ca9aa6 KR |
287 | *charPP += length; |
288 | } | |
289 | ||
290 | #ifndef BFD_ASSEMBLER | |
291 | int section_alignment[SEG_MAXIMUM_ORDINAL]; | |
292 | #endif | |
293 | ||
294 | /* | |
295 | * This routine records the largest alignment seen for each segment. | |
296 | * If the beginning of the segment is aligned on the worst-case | |
297 | * boundary, all of the other alignments within it will work. At | |
298 | * least one object format really uses this info. | |
299 | */ | |
300 | void | |
301 | record_alignment (seg, align) | |
302 | /* Segment to which alignment pertains */ | |
303 | segT seg; | |
304 | /* Alignment, as a power of 2 (e.g., 1 => 2-byte boundary, 2 => 4-byte | |
305 | boundary, etc.) */ | |
306 | int align; | |
307 | { | |
308 | #ifdef BFD_ASSEMBLER | |
309 | if (align > bfd_get_section_alignment (stdoutput, seg)) | |
310 | bfd_set_section_alignment (stdoutput, seg, align); | |
311 | #else | |
312 | if (align > section_alignment[(int) seg]) | |
313 | section_alignment[(int) seg] = align; | |
314 | #endif | |
315 | } | |
316 | ||
a55774a1 KR |
317 | #ifdef BFD_ASSEMBLER |
318 | ||
319 | /* Reset the section indices after removing the gas created sections. */ | |
320 | ||
321 | static void | |
322 | renumber_sections (abfd, sec, countparg) | |
323 | bfd *abfd; | |
324 | asection *sec; | |
325 | PTR countparg; | |
326 | { | |
327 | int *countp = (int *) countparg; | |
328 | ||
329 | sec->index = *countp; | |
330 | ++*countp; | |
331 | } | |
332 | ||
333 | #endif /* defined (BFD_ASSEMBLER) */ | |
334 | ||
43ca9aa6 KR |
335 | #if defined (BFD_ASSEMBLER) || ! defined (BFD) |
336 | ||
337 | static fragS * | |
338 | chain_frchains_together_1 (section, frchp) | |
339 | segT section; | |
340 | struct frchain *frchp; | |
341 | { | |
342 | fragS dummy, *prev_frag = &dummy; | |
262b22cd ILT |
343 | fixS fix_dummy, *prev_fix = &fix_dummy; |
344 | ||
43ca9aa6 KR |
345 | for (; frchp && frchp->frch_seg == section; frchp = frchp->frch_next) |
346 | { | |
347 | prev_frag->fr_next = frchp->frch_root; | |
348 | prev_frag = frchp->frch_last; | |
3a0e38ee | 349 | #ifdef BFD_ASSEMBLER |
262b22cd ILT |
350 | if (frchp->fix_root != (fixS *) NULL) |
351 | { | |
352 | if (seg_info (section)->fix_root == (fixS *) NULL) | |
353 | seg_info (section)->fix_root = frchp->fix_root; | |
354 | prev_fix->fx_next = frchp->fix_root; | |
1b96bdce | 355 | seg_info (section)->fix_tail = frchp->fix_tail; |
262b22cd ILT |
356 | prev_fix = frchp->fix_tail; |
357 | } | |
3a0e38ee | 358 | #endif |
43ca9aa6 KR |
359 | } |
360 | prev_frag->fr_next = 0; | |
361 | return prev_frag; | |
362 | } | |
363 | ||
364 | #endif | |
365 | ||
366 | #ifdef BFD_ASSEMBLER | |
367 | ||
368 | static void | |
369 | chain_frchains_together (abfd, section, xxx) | |
370 | bfd *abfd; /* unused */ | |
371 | segT section; | |
a58374d7 | 372 | PTR xxx; /* unused */ |
43ca9aa6 | 373 | { |
f2f7d044 ILT |
374 | segment_info_type *info; |
375 | ||
376 | /* BFD may have introduced its own sections without using | |
377 | subseg_new, so it is possible that seg_info is NULL. */ | |
378 | info = seg_info (section); | |
379 | if (info != (segment_info_type *) NULL) | |
0f894895 JL |
380 | info->frchainP->frch_last |
381 | = chain_frchains_together_1 (section, info->frchainP); | |
1b96bdce ILT |
382 | |
383 | /* Now that we've chained the frags together, we must add new fixups | |
384 | to the segment, not to the frag chain. */ | |
385 | frags_chained = 1; | |
43ca9aa6 KR |
386 | } |
387 | ||
388 | #endif | |
542e1629 | 389 | |
d5364748 | 390 | #if !defined (BFD) && !defined (BFD_ASSEMBLER) |
65bfcf2e | 391 | |
6efd877d KR |
392 | void |
393 | remove_subsegs (head, seg, root, last) | |
394 | frchainS *head; | |
395 | int seg; | |
396 | fragS **root; | |
397 | fragS **last; | |
65bfcf2e | 398 | { |
65bfcf2e | 399 | *root = head->frch_root; |
43ca9aa6 KR |
400 | *last = chain_frchains_together_1 (seg, head); |
401 | } | |
402 | ||
403 | #endif /* BFD */ | |
404 | ||
80aab579 ILT |
405 | #if defined (BFD_ASSEMBLER) || !defined (BFD) |
406 | ||
43ca9aa6 | 407 | #ifdef BFD_ASSEMBLER |
58d4951d ILT |
408 | static void |
409 | cvt_frag_to_fill (sec, fragP) | |
410 | segT sec; | |
43ca9aa6 | 411 | fragS *fragP; |
43ca9aa6 | 412 | #else |
58d4951d ILT |
413 | static void |
414 | cvt_frag_to_fill (headers, fragP) | |
415 | object_headers *headers; | |
416 | fragS *fragP; | |
43ca9aa6 | 417 | #endif |
58d4951d | 418 | { |
43ca9aa6 | 419 | switch (fragP->fr_type) |
6efd877d | 420 | { |
43ca9aa6 | 421 | case rs_align: |
cd3b81bd | 422 | case rs_align_code: |
43ca9aa6 | 423 | case rs_org: |
cd3b81bd | 424 | case rs_space: |
43ca9aa6 KR |
425 | #ifdef HANDLE_ALIGN |
426 | HANDLE_ALIGN (fragP); | |
427 | #endif | |
43ca9aa6 | 428 | know (fragP->fr_next != NULL); |
43ca9aa6 KR |
429 | fragP->fr_offset = (fragP->fr_next->fr_address |
430 | - fragP->fr_address | |
98c6bbbe | 431 | - fragP->fr_fix) / fragP->fr_var; |
cd3b81bd KR |
432 | assert (fragP->fr_offset >= 0); |
433 | fragP->fr_type = rs_fill; | |
43ca9aa6 | 434 | break; |
65bfcf2e | 435 | |
43ca9aa6 KR |
436 | case rs_fill: |
437 | break; | |
438 | ||
439 | case rs_machine_dependent: | |
440 | #ifdef BFD_ASSEMBLER | |
441 | md_convert_frag (stdoutput, sec, fragP); | |
442 | #else | |
443 | md_convert_frag (headers, fragP); | |
444 | #endif | |
445 | ||
d5364748 | 446 | assert (fragP->fr_next == NULL || (fragP->fr_next->fr_address - fragP->fr_address == fragP->fr_fix)); |
43ca9aa6 KR |
447 | |
448 | /* | |
449 | * After md_convert_frag, we make the frag into a ".space 0". | |
450 | * Md_convert_frag() should set up any fixSs and constants | |
451 | * required. | |
452 | */ | |
453 | frag_wane (fragP); | |
454 | break; | |
455 | ||
456 | #ifndef WORKING_DOT_WORD | |
457 | case rs_broken_word: | |
458 | { | |
459 | struct broken_word *lie; | |
460 | ||
461 | if (fragP->fr_subtype) | |
462 | { | |
463 | fragP->fr_fix += md_short_jump_size; | |
464 | for (lie = (struct broken_word *) (fragP->fr_symbol); | |
465 | lie && lie->dispfrag == fragP; | |
466 | lie = lie->next_broken_word) | |
467 | if (lie->added == 1) | |
468 | fragP->fr_fix += md_long_jump_size; | |
469 | } | |
470 | frag_wane (fragP); | |
471 | } | |
472 | break; | |
473 | #endif | |
474 | ||
475 | default: | |
476 | BAD_CASE (fragP->fr_type); | |
477 | break; | |
6efd877d | 478 | } |
65bfcf2e | 479 | } |
6efd877d | 480 | |
80aab579 ILT |
481 | #endif /* defined (BFD_ASSEMBLER) || !defined (BFD) */ |
482 | ||
43ca9aa6 KR |
483 | #ifdef BFD_ASSEMBLER |
484 | static void | |
485 | relax_and_size_seg (abfd, sec, xxx) | |
486 | bfd *abfd; | |
487 | asection *sec; | |
a58374d7 | 488 | PTR xxx; |
43ca9aa6 KR |
489 | { |
490 | flagword flags; | |
13e9182d KR |
491 | fragS *fragp; |
492 | segment_info_type *seginfo; | |
493 | int x; | |
494 | valueT size, newsize; | |
43ca9aa6 KR |
495 | |
496 | flags = bfd_get_section_flags (abfd, sec); | |
497 | ||
d9d6f094 | 498 | seginfo = seg_info (sec); |
13e9182d | 499 | if (seginfo && seginfo->frchainP) |
43ca9aa6 | 500 | { |
13e9182d KR |
501 | relax_segment (seginfo->frchainP->frch_root, sec); |
502 | for (fragp = seginfo->frchainP->frch_root; fragp; fragp = fragp->fr_next) | |
503 | cvt_frag_to_fill (sec, fragp); | |
504 | for (fragp = seginfo->frchainP->frch_root; | |
505 | fragp->fr_next; | |
506 | fragp = fragp->fr_next) | |
507 | /* walk to last elt */; | |
508 | size = fragp->fr_address + fragp->fr_fix; | |
509 | } | |
510 | else | |
511 | size = 0; | |
a58374d7 ILT |
512 | |
513 | if (size > 0 && ! seginfo->bss) | |
514 | flags |= SEC_HAS_CONTENTS; | |
515 | ||
516 | /* @@ This is just an approximation. */ | |
5f6efd5a | 517 | if (seginfo && seginfo->fix_root) |
a58374d7 ILT |
518 | flags |= SEC_RELOC; |
519 | else | |
520 | flags &= ~SEC_RELOC; | |
521 | x = bfd_set_section_flags (abfd, sec, flags); | |
522 | assert (x == true); | |
523 | ||
20b39b6f JL |
524 | newsize = md_section_align (sec, size); |
525 | x = bfd_set_section_size (abfd, sec, newsize); | |
13e9182d KR |
526 | assert (x == true); |
527 | ||
528 | /* If the size had to be rounded up, add some padding in the last | |
529 | non-empty frag. */ | |
13e9182d KR |
530 | assert (newsize >= size); |
531 | if (size != newsize) | |
532 | { | |
533 | fragS *last = seginfo->frchainP->frch_last; | |
534 | fragp = seginfo->frchainP->frch_root; | |
535 | while (fragp->fr_next != last) | |
536 | fragp = fragp->fr_next; | |
537 | last->fr_address = size; | |
538 | fragp->fr_offset += newsize - size; | |
539 | } | |
540 | ||
43ca9aa6 KR |
541 | #ifdef tc_frob_section |
542 | tc_frob_section (sec); | |
543 | #endif | |
544 | #ifdef obj_frob_section | |
545 | obj_frob_section (sec); | |
546 | #endif | |
547 | } | |
548 | ||
d5364748 KR |
549 | #ifdef DEBUG2 |
550 | static void | |
551 | dump_section_relocs (abfd, sec, stream_) | |
552 | bfd *abfd; | |
553 | asection *sec; | |
554 | char *stream_; | |
555 | { | |
556 | FILE *stream = (FILE *) stream_; | |
557 | segment_info_type *seginfo = seg_info (sec); | |
558 | fixS *fixp = seginfo->fix_root; | |
559 | ||
560 | if (!fixp) | |
561 | return; | |
562 | ||
563 | fprintf (stream, "sec %s relocs:\n", sec->name); | |
564 | while (fixp) | |
565 | { | |
566 | symbolS *s = fixp->fx_addsy; | |
567 | if (s) | |
1cf7548e KR |
568 | { |
569 | fprintf (stream, " %08x: %s(%s", fixp, S_GET_NAME (s), | |
570 | s->bsym->section->name); | |
571 | if (s->bsym->flags & BSF_SECTION_SYM) | |
572 | { | |
573 | fprintf (stream, " section sym"); | |
574 | if (S_GET_VALUE (s)) | |
575 | fprintf (stream, "+%x", S_GET_VALUE (s)); | |
576 | } | |
577 | else | |
578 | fprintf (stream, "+%x", S_GET_VALUE (s)); | |
579 | fprintf (stream, ")+%x\n", fixp->fx_offset); | |
580 | } | |
d5364748 KR |
581 | else |
582 | fprintf (stream, " %08x: type %d no sym\n", fixp, fixp->fx_r_type); | |
583 | fixp = fixp->fx_next; | |
584 | } | |
585 | } | |
586 | #else | |
587 | #define dump_section_relocs(ABFD,SEC,STREAM) (void)(ABFD,SEC,STREAM) | |
588 | #endif | |
589 | ||
98c6bbbe KR |
590 | #ifndef EMIT_SECTION_SYMBOLS |
591 | #define EMIT_SECTION_SYMBOLS 1 | |
592 | #endif | |
593 | ||
d5364748 KR |
594 | static void |
595 | adjust_reloc_syms (abfd, sec, xxx) | |
596 | bfd *abfd; | |
597 | asection *sec; | |
a58374d7 | 598 | PTR xxx; |
d5364748 KR |
599 | { |
600 | segment_info_type *seginfo = seg_info (sec); | |
601 | fixS *fixp; | |
602 | ||
603 | if (seginfo == NULL) | |
604 | return; | |
605 | ||
606 | dump_section_relocs (abfd, sec, stderr); | |
607 | ||
608 | for (fixp = seginfo->fix_root; fixp; fixp = fixp->fx_next) | |
98c6bbbe KR |
609 | if (fixp->fx_done) |
610 | /* ignore it */; | |
611 | else if (fixp->fx_addsy) | |
d5364748 | 612 | { |
a55774a1 | 613 | symbolS *sym; |
4acf8c78 KR |
614 | asection *symsec; |
615 | ||
616 | reduce_fixup: | |
617 | ||
a55774a1 KR |
618 | #ifdef DEBUG5 |
619 | fprintf (stderr, "\n\nadjusting fixup:\n"); | |
620 | print_fixup (fixp); | |
621 | #endif | |
622 | ||
623 | sym = fixp->fx_addsy; | |
4acf8c78 | 624 | symsec = sym->bsym->section; |
d5364748 | 625 | |
a58374d7 ILT |
626 | /* If it's one of these sections, assume the symbol is |
627 | definitely going to be output. The code in | |
628 | md_estimate_size_before_relax in tc-mips.c uses this test | |
629 | as well, so if you change this code you should look at that | |
630 | code. */ | |
cd3b81bd KR |
631 | if (bfd_is_und_section (symsec) |
632 | || bfd_is_abs_section (symsec) | |
d5364748 | 633 | || bfd_is_com_section (symsec)) |
80aab579 ILT |
634 | { |
635 | fixp->fx_addsy->sy_used_in_reloc = 1; | |
a55774a1 | 636 | goto done; |
80aab579 | 637 | } |
d5364748 KR |
638 | |
639 | /* Since we're reducing to section symbols, don't attempt to reduce | |
640 | anything that's already using one. */ | |
98c6bbbe | 641 | if (sym->bsym->flags & BSF_SECTION_SYM) |
80aab579 ILT |
642 | { |
643 | fixp->fx_addsy->sy_used_in_reloc = 1; | |
a55774a1 | 644 | goto done; |
80aab579 | 645 | } |
d5364748 KR |
646 | |
647 | /* Is there some other reason we can't adjust this one? (E.g., | |
648 | call/bal links in i960-bout symbols.) */ | |
649 | #ifdef obj_fix_adjustable | |
650 | if (! obj_fix_adjustable (fixp)) | |
80aab579 ILT |
651 | { |
652 | fixp->fx_addsy->sy_used_in_reloc = 1; | |
a55774a1 | 653 | goto done; |
80aab579 | 654 | } |
d5364748 | 655 | #endif |
efa0c22e KR |
656 | |
657 | /* Is there some other (target cpu dependent) reason we can't adjust | |
658 | this one? (E.g. relocations involving function addresses on | |
659 | the PA. */ | |
660 | #ifdef tc_fix_adjustable | |
661 | if (! tc_fix_adjustable (fixp)) | |
20b39b6f JL |
662 | { |
663 | fixp->fx_addsy->sy_used_in_reloc = 1; | |
a55774a1 | 664 | goto done; |
20b39b6f | 665 | } |
efa0c22e KR |
666 | #endif |
667 | ||
4acf8c78 KR |
668 | /* For PIC support: We may get expressions like |
669 | "_GLOBAL_OFFSET_TABLE_+(.-L5)" where "." and "L5" may not | |
670 | necessarily have had a fixed difference initially. But now | |
671 | it should be a known constant, so we can reduce it. Since | |
672 | we can't easily handle a symbol value that looks like | |
673 | someUndefinedSymbol+const, though, we convert the fixup to | |
674 | access the undefined symbol directly, and discard the | |
675 | intermediate symbol. */ | |
676 | if (S_GET_SEGMENT (sym) == expr_section | |
677 | && sym->sy_value.X_op == O_add | |
678 | && (resolve_symbol_value (sym->sy_value.X_add_symbol), | |
679 | S_GET_SEGMENT (sym->sy_value.X_add_symbol) == undefined_section) | |
680 | && (resolve_symbol_value (sym->sy_value.X_op_symbol), | |
681 | S_GET_SEGMENT (sym->sy_value.X_op_symbol) == absolute_section)) | |
682 | { | |
683 | fixp->fx_offset += S_GET_VALUE (sym->sy_value.X_op_symbol); | |
684 | fixp->fx_offset += sym->sy_value.X_add_number; | |
a55774a1 | 685 | fixp->fx_addsy = sym->sy_value.X_add_symbol; |
4acf8c78 KR |
686 | goto reduce_fixup; |
687 | } | |
688 | ||
d5364748 KR |
689 | /* If the section symbol isn't going to be output, the relocs |
690 | at least should still work. If not, figure out what to do | |
691 | when we run into that case. */ | |
692 | fixp->fx_offset += S_GET_VALUE (sym); | |
6868afe6 | 693 | fixp->fx_addsy = section_symbol (symsec); |
80aab579 | 694 | fixp->fx_addsy->sy_used_in_reloc = 1; |
a55774a1 KR |
695 | |
696 | done: | |
697 | ; | |
d5364748 | 698 | } |
1cf7548e | 699 | #if 1/*def RELOC_REQUIRES_SYMBOL*/ |
e67a0640 KR |
700 | else |
701 | { | |
702 | /* There was no symbol required by this relocation. However, | |
703 | BFD doesn't really handle relocations without symbols well. | |
704 | (At least, the COFF support doesn't.) So for now we fake up | |
705 | a local symbol in the absolute section. */ | |
e8501a72 | 706 | |
1cf7548e | 707 | fixp->fx_addsy = section_symbol (absolute_section); |
a55774a1 | 708 | /* fixp->fx_addsy->sy_used_in_reloc = 1; */ |
e67a0640 KR |
709 | } |
710 | #endif | |
d5364748 KR |
711 | |
712 | dump_section_relocs (abfd, sec, stderr); | |
713 | } | |
714 | ||
43ca9aa6 | 715 | static void |
8d6c34a1 | 716 | write_relocs (abfd, sec, xxx) |
43ca9aa6 KR |
717 | bfd *abfd; |
718 | asection *sec; | |
a58374d7 | 719 | PTR xxx; |
43ca9aa6 KR |
720 | { |
721 | segment_info_type *seginfo = seg_info (sec); | |
80aab579 ILT |
722 | int i; |
723 | unsigned int n; | |
43ca9aa6 KR |
724 | arelent **relocs; |
725 | fixS *fixp; | |
98c6bbbe | 726 | char *err; |
43ca9aa6 | 727 | |
d5364748 KR |
728 | /* If seginfo is NULL, we did not create this section; don't do |
729 | anything with it. */ | |
730 | if (seginfo == NULL) | |
43ca9aa6 KR |
731 | return; |
732 | ||
733 | fixup_segment (seginfo->fix_root, sec); | |
734 | ||
3d3c5039 | 735 | n = 0; |
d5364748 KR |
736 | for (fixp = seginfo->fix_root; fixp; fixp = fixp->fx_next) |
737 | n++; | |
43ca9aa6 | 738 | |
d5364748 | 739 | #ifndef RELOC_EXPANSION_POSSIBLE |
43ca9aa6 | 740 | /* Set up reloc information as well. */ |
43ca9aa6 KR |
741 | relocs = (arelent **) bfd_alloc_by_size_t (stdoutput, |
742 | n * sizeof (arelent *)); | |
8d6c34a1 | 743 | memset ((char*)relocs, 0, n * sizeof (arelent*)); |
43ca9aa6 | 744 | |
3d3c5039 ILT |
745 | i = 0; |
746 | for (fixp = seginfo->fix_root; fixp != (fixS *) NULL; fixp = fixp->fx_next) | |
747 | { | |
748 | arelent *reloc; | |
3d3c5039 ILT |
749 | bfd_reloc_status_type s; |
750 | ||
98c6bbbe | 751 | if (fixp->fx_done) |
3d3c5039 | 752 | { |
3d3c5039 ILT |
753 | n--; |
754 | continue; | |
755 | } | |
756 | reloc = tc_gen_reloc (sec, fixp); | |
757 | if (!reloc) | |
758 | { | |
759 | n--; | |
760 | continue; | |
761 | } | |
c43d56f7 | 762 | if (fixp->fx_where + fixp->fx_size |
3d3c5039 ILT |
763 | > fixp->fx_frag->fr_fix + fixp->fx_frag->fr_offset) |
764 | abort (); | |
335d35c8 | 765 | |
4acf8c78 KR |
766 | s = bfd_install_relocation (stdoutput, reloc, |
767 | fixp->fx_frag->fr_literal, | |
768 | fixp->fx_frag->fr_address, | |
769 | sec, &err); | |
3d3c5039 ILT |
770 | switch (s) |
771 | { | |
772 | case bfd_reloc_ok: | |
773 | break; | |
df44a852 KR |
774 | case bfd_reloc_overflow: |
775 | as_bad_where (fixp->fx_file, fixp->fx_line, "relocation overflow"); | |
776 | break; | |
3d3c5039 | 777 | default: |
4acf8c78 KR |
778 | as_fatal ("%s:%u: bad return from bfd_perform_relocation", |
779 | fixp->fx_file, fixp->fx_line); | |
3d3c5039 ILT |
780 | } |
781 | relocs[i++] = reloc; | |
782 | } | |
d5364748 KR |
783 | #else |
784 | n = n * MAX_RELOC_EXPANSION; | |
785 | /* Set up reloc information as well. */ | |
786 | relocs = (arelent **) bfd_alloc_by_size_t (stdoutput, | |
787 | n * sizeof (arelent *)); | |
788 | ||
789 | i = 0; | |
790 | for (fixp = seginfo->fix_root; fixp != (fixS *) NULL; fixp = fixp->fx_next) | |
791 | { | |
792 | arelent **reloc; | |
d5364748 KR |
793 | char *data; |
794 | bfd_reloc_status_type s; | |
795 | int j; | |
796 | ||
98c6bbbe | 797 | if (fixp->fx_done) |
d5364748 | 798 | { |
d5364748 KR |
799 | n--; |
800 | continue; | |
801 | } | |
802 | reloc = tc_gen_reloc (sec, fixp); | |
803 | ||
804 | for (j = 0; reloc[j]; j++) | |
805 | { | |
806 | relocs[i++] = reloc[j]; | |
807 | assert(i <= n); | |
808 | } | |
809 | data = fixp->fx_frag->fr_literal + fixp->fx_where; | |
c43d56f7 | 810 | if (fixp->fx_where + fixp->fx_size |
d5364748 KR |
811 | > fixp->fx_frag->fr_fix + fixp->fx_frag->fr_offset) |
812 | abort (); | |
813 | for (j = 0; reloc[j]; j++) | |
814 | { | |
a55774a1 KR |
815 | s = bfd_install_relocation (stdoutput, reloc[j], |
816 | fixp->fx_frag->fr_literal, | |
817 | fixp->fx_frag->fr_address, | |
818 | sec, &err); | |
d5364748 KR |
819 | switch (s) |
820 | { | |
98c6bbbe KR |
821 | case bfd_reloc_ok: |
822 | break; | |
4acf8c78 KR |
823 | case bfd_reloc_overflow: |
824 | as_bad_where (fixp->fx_file, fixp->fx_line, | |
825 | "relocation overflow"); | |
826 | break; | |
98c6bbbe | 827 | default: |
4acf8c78 KR |
828 | as_fatal ("%s:%u: bad return from bfd_perform_relocation", |
829 | fixp->fx_file, fixp->fx_line); | |
d5364748 KR |
830 | } |
831 | } | |
832 | } | |
833 | n = i; | |
834 | #endif | |
835 | ||
1cf7548e KR |
836 | #ifdef DEBUG4 |
837 | { | |
838 | int i, j, nsyms; | |
839 | asymbol **sympp; | |
840 | sympp = bfd_get_outsymbols (stdoutput); | |
841 | nsyms = bfd_get_symcount (stdoutput); | |
842 | for (i = 0; i < n; i++) | |
843 | if (((*relocs[i]->sym_ptr_ptr)->flags & BSF_SECTION_SYM) == 0) | |
844 | { | |
845 | for (j = 0; j < nsyms; j++) | |
846 | if (sympp[j] == *relocs[i]->sym_ptr_ptr) | |
847 | break; | |
848 | if (j == nsyms) | |
849 | abort (); | |
850 | } | |
851 | } | |
852 | #endif | |
853 | ||
3d3c5039 ILT |
854 | if (n) |
855 | bfd_set_reloc (stdoutput, sec, relocs, n); | |
d5364748 KR |
856 | else |
857 | bfd_set_section_flags (abfd, sec, | |
80aab579 ILT |
858 | (bfd_get_section_flags (abfd, sec) |
859 | & (flagword) ~SEC_RELOC)); | |
98c6bbbe KR |
860 | |
861 | #ifdef DEBUG3 | |
d5364748 KR |
862 | { |
863 | int i; | |
864 | arelent *r; | |
865 | asymbol *s; | |
866 | fprintf (stderr, "relocs for sec %s\n", sec->name); | |
867 | for (i = 0; i < n; i++) | |
868 | { | |
869 | r = relocs[i]; | |
870 | s = *r->sym_ptr_ptr; | |
871 | fprintf (stderr, " reloc %2d @%08x off %4x : sym %-10s addend %x\n", | |
872 | i, r, r->address, s->name, r->addend); | |
873 | } | |
874 | } | |
875 | #endif | |
8d6c34a1 | 876 | } |
d5364748 | 877 | |
8d6c34a1 KR |
878 | static void |
879 | write_contents (abfd, sec, xxx) | |
880 | bfd *abfd; | |
881 | asection *sec; | |
a58374d7 | 882 | PTR xxx; |
8d6c34a1 KR |
883 | { |
884 | segment_info_type *seginfo = seg_info (sec); | |
885 | unsigned long offset = 0; | |
80aab579 | 886 | fragS *f; |
3d3c5039 ILT |
887 | |
888 | /* Write out the frags. */ | |
f37449aa ILT |
889 | if (seginfo == NULL |
890 | || ! (bfd_get_section_flags (abfd, sec) & SEC_HAS_CONTENTS)) | |
d5364748 KR |
891 | return; |
892 | ||
80aab579 ILT |
893 | for (f = seginfo->frchainP->frch_root; |
894 | f; | |
895 | f = f->fr_next) | |
43ca9aa6 KR |
896 | { |
897 | int x; | |
898 | unsigned long fill_size; | |
899 | char *fill_literal; | |
900 | long count; | |
901 | ||
80aab579 ILT |
902 | assert (f->fr_type == rs_fill); |
903 | if (f->fr_fix) | |
43ca9aa6 KR |
904 | { |
905 | x = bfd_set_section_contents (stdoutput, sec, | |
80aab579 ILT |
906 | f->fr_literal, (file_ptr) offset, |
907 | (bfd_size_type) f->fr_fix); | |
1cf7548e KR |
908 | if (x == false) |
909 | { | |
910 | bfd_perror (stdoutput->filename); | |
911 | as_perror ("FATAL: Can't write %s", stdoutput->filename); | |
4acf8c78 | 912 | exit (EXIT_FAILURE); |
1cf7548e | 913 | } |
80aab579 | 914 | offset += f->fr_fix; |
43ca9aa6 | 915 | } |
80aab579 ILT |
916 | fill_literal = f->fr_literal + f->fr_fix; |
917 | fill_size = f->fr_var; | |
918 | count = f->fr_offset; | |
43ca9aa6 KR |
919 | assert (count >= 0); |
920 | if (fill_size && count) | |
d9d6f094 KR |
921 | #ifdef BFD_FAST_SECTION_FILL |
922 | { | |
923 | char buf[256]; | |
924 | if (fill_size > sizeof(buf)) { | |
925 | /* Do it the old way. Can this ever happen? */ | |
43ca9aa6 KR |
926 | while (count--) |
927 | { | |
928 | x = bfd_set_section_contents (stdoutput, sec, | |
80aab579 | 929 | fill_literal, (file_ptr) offset, |
d5364748 | 930 | (bfd_size_type) fill_size); |
1cf7548e KR |
931 | if (x == false) |
932 | { | |
933 | bfd_perror (stdoutput->filename); | |
934 | as_perror ("FATAL: Can't write %s", stdoutput->filename); | |
4acf8c78 | 935 | exit (EXIT_FAILURE); |
1cf7548e | 936 | } |
43ca9aa6 KR |
937 | offset += fill_size; |
938 | } | |
d9d6f094 KR |
939 | } |
940 | else { | |
941 | /* Build a buffer full of fill objects and output it as | |
942 | * often as necessary. This saves on the overhead of potentially | |
943 | * lots of bfd_set_section_contents calls. | |
944 | */ | |
945 | int n_per_buf, bytes, i; | |
946 | if (fill_size == 1) | |
947 | { | |
948 | n_per_buf = sizeof (buf); | |
949 | memset (buf, *fill_literal, n_per_buf); | |
950 | } | |
951 | else | |
952 | { | |
953 | char *bufp; | |
954 | n_per_buf = sizeof(buf)/fill_size; | |
955 | for (i = n_per_buf, bufp = buf; i; i--, bufp += fill_size) | |
956 | memcpy(bufp, fill_literal, fill_size); | |
957 | } | |
958 | for (; count > 0; count -= n_per_buf) | |
959 | { | |
960 | n_per_buf = n_per_buf > count ? count : n_per_buf; | |
961 | x = bfd_set_section_contents (stdoutput, sec, | |
962 | buf, (file_ptr) offset, | |
963 | (bfd_size_type) n_per_buf * fill_size); | |
964 | assert (x == true); | |
965 | offset += n_per_buf * fill_size; | |
966 | } | |
967 | } | |
968 | } | |
969 | #else | |
970 | while (count--) | |
971 | { | |
972 | x = bfd_set_section_contents (stdoutput, sec, | |
973 | fill_literal, (file_ptr) offset, | |
974 | (bfd_size_type) fill_size); | |
975 | assert (x == true); | |
976 | offset += fill_size; | |
977 | } | |
978 | #endif | |
43ca9aa6 | 979 | } |
43ca9aa6 KR |
980 | } |
981 | #endif | |
982 | ||
80aab579 | 983 | #if defined(BFD_ASSEMBLER) || (!defined (BFD) && !defined(OBJ_AOUT)) |
b23f6743 KR |
984 | static void |
985 | merge_data_into_text () | |
986 | { | |
4064305e | 987 | #if defined(BFD_ASSEMBLER) || defined(MANY_SEGMENTS) |
b23f6743 KR |
988 | seg_info (text_section)->frchainP->frch_last->fr_next = |
989 | seg_info (data_section)->frchainP->frch_root; | |
990 | seg_info (text_section)->frchainP->frch_last = | |
991 | seg_info (data_section)->frchainP->frch_last; | |
992 | seg_info (data_section)->frchainP = 0; | |
993 | #else | |
994 | fixS *tmp; | |
995 | ||
996 | text_last_frag->fr_next = data_frag_root; | |
997 | text_last_frag = data_last_frag; | |
998 | data_last_frag = NULL; | |
999 | data_frag_root = NULL; | |
1000 | if (text_fix_root) | |
1001 | { | |
1002 | for (tmp = text_fix_root; tmp->fx_next; tmp = tmp->fx_next);; | |
1003 | tmp->fx_next = data_fix_root; | |
1004 | text_fix_tail = data_fix_tail; | |
1005 | } | |
1006 | else | |
1007 | text_fix_root = data_fix_root; | |
1008 | data_fix_root = NULL; | |
1009 | #endif | |
1010 | } | |
80aab579 | 1011 | #endif /* BFD_ASSEMBLER || (! BFD && ! OBJ_AOUT) */ |
b23f6743 KR |
1012 | |
1013 | #if !defined (BFD_ASSEMBLER) && !defined (BFD) | |
1014 | static void | |
1015 | relax_and_size_all_segments () | |
1016 | { | |
13e9182d KR |
1017 | fragS *fragP; |
1018 | ||
b23f6743 KR |
1019 | relax_segment (text_frag_root, SEG_TEXT); |
1020 | relax_segment (data_frag_root, SEG_DATA); | |
1021 | relax_segment (bss_frag_root, SEG_BSS); | |
1022 | /* | |
1023 | * Now the addresses of frags are correct within the segment. | |
1024 | */ | |
1025 | ||
1026 | know (text_last_frag->fr_type == rs_fill && text_last_frag->fr_offset == 0); | |
1027 | H_SET_TEXT_SIZE (&headers, text_last_frag->fr_address); | |
1028 | text_last_frag->fr_address = H_GET_TEXT_SIZE (&headers); | |
1029 | ||
1030 | /* | |
1031 | * Join the 2 segments into 1 huge segment. | |
1032 | * To do this, re-compute every rn_address in the SEG_DATA frags. | |
1033 | * Then join the data frags after the text frags. | |
1034 | * | |
1035 | * Determine a_data [length of data segment]. | |
1036 | */ | |
1037 | if (data_frag_root) | |
1038 | { | |
1039 | register relax_addressT slide; | |
1040 | ||
1041 | know ((text_last_frag->fr_type == rs_fill) && (text_last_frag->fr_offset == 0)); | |
1042 | ||
1043 | H_SET_DATA_SIZE (&headers, data_last_frag->fr_address); | |
1044 | data_last_frag->fr_address = H_GET_DATA_SIZE (&headers); | |
1045 | slide = H_GET_TEXT_SIZE (&headers); /* & in file of the data segment. */ | |
1046 | #ifdef OBJ_BOUT | |
1047 | #define RoundUp(N,S) (((N)+(S)-1)&-(S)) | |
1048 | /* For b.out: If the data section has a strict alignment | |
1049 | requirement, its load address in the .o file will be | |
1050 | rounded up from the size of the text section. These | |
1051 | two values are *not* the same! Similarly for the bss | |
1052 | section.... */ | |
1053 | slide = RoundUp (slide, 1 << section_alignment[SEG_DATA]); | |
1054 | #endif | |
1055 | ||
1056 | for (fragP = data_frag_root; fragP; fragP = fragP->fr_next) | |
1057 | { | |
1058 | fragP->fr_address += slide; | |
1059 | } /* for each data frag */ | |
1060 | ||
1061 | know (text_last_frag != 0); | |
1062 | text_last_frag->fr_next = data_frag_root; | |
1063 | } | |
1064 | else | |
1065 | { | |
1066 | H_SET_DATA_SIZE (&headers, 0); | |
1067 | } | |
1068 | ||
1069 | #ifdef OBJ_BOUT | |
1070 | /* See above comments on b.out data section address. */ | |
1071 | { | |
1072 | long bss_vma; | |
1073 | if (data_last_frag == 0) | |
1074 | bss_vma = H_GET_TEXT_SIZE (&headers); | |
1075 | else | |
1076 | bss_vma = data_last_frag->fr_address; | |
1077 | bss_vma = RoundUp (bss_vma, 1 << section_alignment[SEG_BSS]); | |
1078 | bss_address_frag.fr_address = bss_vma; | |
1079 | } | |
1080 | #else /* ! OBJ_BOUT */ | |
1081 | bss_address_frag.fr_address = (H_GET_TEXT_SIZE (&headers) + | |
1082 | H_GET_DATA_SIZE (&headers)); | |
1083 | ||
efa0c22e | 1084 | #endif /* ! OBJ_BOUT */ |
b23f6743 KR |
1085 | |
1086 | /* Slide all the frags */ | |
1087 | if (bss_frag_root) | |
1088 | { | |
1089 | relax_addressT slide = bss_address_frag.fr_address; | |
1090 | ||
1091 | for (fragP = bss_frag_root; fragP; fragP = fragP->fr_next) | |
1092 | { | |
1093 | fragP->fr_address += slide; | |
1094 | } /* for each bss frag */ | |
1095 | } | |
1096 | ||
b23f6743 KR |
1097 | if (bss_last_frag) |
1098 | H_SET_BSS_SIZE (&headers, | |
1099 | bss_last_frag->fr_address - bss_frag_root->fr_address); | |
1100 | else | |
1101 | H_SET_BSS_SIZE (&headers, 0); | |
1102 | } | |
1103 | #endif /* ! BFD_ASSEMBLER && ! BFD */ | |
1104 | ||
d5364748 KR |
1105 | #if defined (BFD_ASSEMBLER) || !defined (BFD) |
1106 | ||
1b96bdce | 1107 | #ifdef BFD_ASSEMBLER |
1cf7548e KR |
1108 | static void |
1109 | set_symtab () | |
1110 | { | |
1111 | int nsyms; | |
1112 | asymbol **asympp; | |
1113 | symbolS *symp; | |
1114 | boolean result; | |
1115 | extern PTR bfd_alloc PARAMS ((bfd *, size_t)); | |
1116 | ||
1117 | /* Count symbols. We can't rely on a count made by the loop in | |
1118 | write_object_file, because *_frob_file may add a new symbol or | |
1119 | two. */ | |
1120 | nsyms = 0; | |
1121 | for (symp = symbol_rootP; symp; symp = symbol_next (symp)) | |
1122 | nsyms++; | |
1123 | ||
1124 | if (nsyms) | |
1125 | { | |
1126 | int i; | |
1127 | ||
1128 | asympp = (asymbol **) bfd_alloc (stdoutput, | |
1129 | nsyms * sizeof (asymbol *)); | |
1130 | symp = symbol_rootP; | |
1131 | for (i = 0; i < nsyms; i++, symp = symbol_next (symp)) | |
1132 | { | |
1133 | asympp[i] = symp->bsym; | |
1134 | symp->written = 1; | |
1135 | } | |
1136 | } | |
1137 | else | |
1138 | asympp = 0; | |
1139 | result = bfd_set_symtab (stdoutput, asympp, nsyms); | |
1140 | assert (result == true); | |
1141 | symbol_table_frozen = 1; | |
1142 | } | |
1b96bdce | 1143 | #endif |
1cf7548e | 1144 | |
6efd877d KR |
1145 | void |
1146 | write_object_file () | |
45432836 | 1147 | { |
741f4d66 | 1148 | struct frchain *frchainP; /* Track along all frchains. */ |
58d4951d | 1149 | #if ! defined (BFD_ASSEMBLER) || ! defined (WORKING_DOT_WORD) |
741f4d66 | 1150 | fragS *fragP; /* Track along all frags. */ |
58d4951d | 1151 | #endif |
6efd877d | 1152 | |
43ca9aa6 KR |
1153 | /* Do we really want to write it? */ |
1154 | { | |
1155 | int n_warns, n_errs; | |
1156 | n_warns = had_warnings (); | |
1157 | n_errs = had_errors (); | |
1158 | /* The -Z flag indicates that an object file should be generated, | |
1159 | regardless of warnings and errors. */ | |
def66e24 | 1160 | if (flag_always_generate_output) |
43ca9aa6 KR |
1161 | { |
1162 | if (n_warns || n_errs) | |
1163 | as_warn ("%d error%s, %d warning%s, generating bad object file.\n", | |
1164 | n_errs, n_errs == 1 ? "" : "s", | |
1165 | n_warns, n_warns == 1 ? "" : "s"); | |
1166 | } | |
1167 | else | |
1168 | { | |
1169 | if (n_errs) | |
1170 | as_fatal ("%d error%s, %d warning%s, no object file generated.\n", | |
1171 | n_errs, n_errs == 1 ? "" : "s", | |
1172 | n_warns, n_warns == 1 ? "" : "s"); | |
1173 | } | |
1174 | } | |
1175 | ||
3eb802b5 | 1176 | #ifdef OBJ_VMS |
1cf7548e KR |
1177 | /* Under VMS we try to be compatible with VAX-11 "C". Thus, we call |
1178 | a routine to check for the definition of the procedure "_main", | |
1179 | and if so -- fix it up so that it can be program entry point. */ | |
6efd877d | 1180 | VMS_Check_For_Main (); |
fecd2382 | 1181 | #endif /* VMS */ |
43ca9aa6 KR |
1182 | |
1183 | /* After every sub-segment, we fake an ".align ...". This conforms to | |
1184 | BSD4.2 brane-damage. We then fake ".fill 0" because that is the kind of | |
1185 | frag that requires least thought. ".align" frags like to have a | |
1186 | following frag since that makes calculating their intended length | |
1187 | trivial. | |
1188 | ||
1189 | @@ Is this really necessary?? */ | |
3eb802b5 | 1190 | #ifndef SUB_SEGMENT_ALIGN |
43ca9aa6 | 1191 | #ifdef BFD_ASSEMBLER |
f2f7d044 | 1192 | #define SUB_SEGMENT_ALIGN(SEG) (0) |
43ca9aa6 | 1193 | #else |
f2f7d044 | 1194 | #define SUB_SEGMENT_ALIGN(SEG) (2) |
43ca9aa6 | 1195 | #endif |
3eb802b5 | 1196 | #endif |
6efd877d KR |
1197 | for (frchainP = frchain_root; frchainP; frchainP = frchainP->frch_next) |
1198 | { | |
43ca9aa6 | 1199 | subseg_set (frchainP->frch_seg, frchainP->frch_subseg); |
f2f7d044 | 1200 | frag_align (SUB_SEGMENT_ALIGN (now_seg), NOP_OPCODE); |
43ca9aa6 KR |
1201 | /* frag_align will have left a new frag. |
1202 | Use this last frag for an empty ".fill". | |
1203 | ||
1204 | For this segment ... | |
1205 | Create a last frag. Do not leave a "being filled in frag". */ | |
6efd877d KR |
1206 | frag_wane (frag_now); |
1207 | frag_now->fr_fix = 0; | |
1208 | know (frag_now->fr_next == NULL); | |
43ca9aa6 | 1209 | } |
6efd877d | 1210 | |
43ca9aa6 KR |
1211 | /* From now on, we don't care about sub-segments. Build one frag chain |
1212 | for each segment. Linked thru fr_next. */ | |
65bfcf2e | 1213 | |
43ca9aa6 KR |
1214 | #ifdef BFD_ASSEMBLER |
1215 | /* Remove the sections created by gas for its own purposes. */ | |
1216 | { | |
1217 | asection **seclist, *sec; | |
a55774a1 KR |
1218 | int i; |
1219 | ||
43ca9aa6 KR |
1220 | seclist = &stdoutput->sections; |
1221 | while (seclist && *seclist) | |
1222 | { | |
1223 | sec = *seclist; | |
5ac34ac3 | 1224 | while (sec == reg_section || sec == expr_section) |
43ca9aa6 KR |
1225 | { |
1226 | sec = sec->next; | |
1227 | *seclist = sec; | |
1228 | stdoutput->section_count--; | |
1229 | if (!sec) | |
1230 | break; | |
1231 | } | |
1232 | if (*seclist) | |
1233 | seclist = &(*seclist)->next; | |
1234 | } | |
a55774a1 KR |
1235 | i = 0; |
1236 | bfd_map_over_sections (stdoutput, renumber_sections, &i); | |
43ca9aa6 KR |
1237 | } |
1238 | ||
1239 | bfd_map_over_sections (stdoutput, chain_frchains_together, (char *) 0); | |
1240 | #else | |
6efd877d KR |
1241 | remove_subsegs (frchain_root, SEG_TEXT, &text_frag_root, &text_last_frag); |
1242 | remove_subsegs (data0_frchainP, SEG_DATA, &data_frag_root, &data_last_frag); | |
1243 | remove_subsegs (bss0_frchainP, SEG_BSS, &bss_frag_root, &bss_last_frag); | |
43ca9aa6 | 1244 | #endif |
6efd877d | 1245 | |
43ca9aa6 KR |
1246 | /* We have two segments. If user gave -R flag, then we must put the |
1247 | data frags into the text segment. Do this before relaxing so | |
1248 | we know to take advantage of -R and make shorter addresses. */ | |
1249 | #if !defined (OBJ_AOUT) || defined (BFD_ASSEMBLER) | |
def66e24 | 1250 | if (flag_readonly_data_in_text) |
6efd877d | 1251 | { |
b23f6743 | 1252 | merge_data_into_text (); |
6efd877d KR |
1253 | } |
1254 | #endif | |
43ca9aa6 KR |
1255 | |
1256 | #ifdef BFD_ASSEMBLER | |
1257 | bfd_map_over_sections (stdoutput, relax_and_size_seg, (char *) 0); | |
1258 | #else | |
b23f6743 | 1259 | relax_and_size_all_segments (); |
43ca9aa6 | 1260 | #endif /* BFD_ASSEMBLER */ |
65bfcf2e | 1261 | |
43ca9aa6 | 1262 | #ifndef BFD_ASSEMBLER |
6efd877d | 1263 | /* |
7f2cb270 KR |
1264 | * |
1265 | * Crawl the symbol chain. | |
1266 | * | |
1267 | * For each symbol whose value depends on a frag, take the address of | |
1268 | * that frag and subsume it into the value of the symbol. | |
1269 | * After this, there is just one way to lookup a symbol value. | |
1270 | * Values are left in their final state for object file emission. | |
1271 | * We adjust the values of 'L' local symbols, even if we do | |
1272 | * not intend to emit them to the object file, because their values | |
1273 | * are needed for fix-ups. | |
1274 | * | |
1275 | * Unless we saw a -L flag, remove all symbols that begin with 'L' | |
1276 | * from the symbol chain. (They are still pointed to by the fixes.) | |
1277 | * | |
1278 | * Count the remaining symbols. | |
1279 | * Assign a symbol number to each symbol. | |
1280 | * Count the number of string-table chars we will emit. | |
1281 | * Put this info into the headers as appropriate. | |
1282 | * | |
1283 | */ | |
6efd877d KR |
1284 | know (zero_address_frag.fr_address == 0); |
1285 | string_byte_count = sizeof (string_byte_count); | |
1286 | ||
1287 | obj_crawl_symbol_chain (&headers); | |
1288 | ||
1289 | if (string_byte_count == sizeof (string_byte_count)) | |
43ca9aa6 | 1290 | string_byte_count = 0; |
6efd877d KR |
1291 | |
1292 | H_SET_STRING_SIZE (&headers, string_byte_count); | |
1293 | ||
1294 | /* | |
7f2cb270 KR |
1295 | * Addresses of frags now reflect addresses we use in the object file. |
1296 | * Symbol values are correct. | |
1297 | * Scan the frags, converting any ".org"s and ".align"s to ".fill"s. | |
1298 | * Also converting any machine-dependent frags using md_convert_frag(); | |
1299 | */ | |
6efd877d KR |
1300 | subseg_change (SEG_TEXT, 0); |
1301 | ||
1302 | for (fragP = text_frag_root; fragP; fragP = fragP->fr_next) | |
1303 | { | |
43ca9aa6 | 1304 | cvt_frag_to_fill (&headers, fragP); |
6efd877d | 1305 | |
43ca9aa6 KR |
1306 | /* Some assert macros don't work with # directives mixed in. */ |
1307 | #ifndef NDEBUG | |
1308 | if (!(fragP->fr_next == NULL | |
ebfb4167 | 1309 | #ifdef OBJ_BOUT |
43ca9aa6 | 1310 | || fragP->fr_next == data_frag_root |
ebfb4167 | 1311 | #endif |
6efd877d | 1312 | || ((fragP->fr_next->fr_address - fragP->fr_address) |
43ca9aa6 KR |
1313 | == (fragP->fr_fix + fragP->fr_offset * fragP->fr_var)))) |
1314 | abort (); | |
1315 | #endif | |
1316 | } | |
1317 | #endif /* ! BFD_ASSEMBLER */ | |
6efd877d | 1318 | |
fecd2382 | 1319 | #ifndef WORKING_DOT_WORD |
6efd877d KR |
1320 | { |
1321 | struct broken_word *lie; | |
1322 | struct broken_word **prevP; | |
1323 | ||
1324 | prevP = &broken_words; | |
1325 | for (lie = broken_words; lie; lie = lie->next_broken_word) | |
1326 | if (!lie->added) | |
a39116f1 | 1327 | { |
5ac34ac3 ILT |
1328 | expressionS exp; |
1329 | ||
1330 | exp.X_op = O_subtract; | |
1331 | exp.X_add_symbol = lie->add; | |
1332 | exp.X_op_symbol = lie->sub; | |
1333 | exp.X_add_number = lie->addnum; | |
43ca9aa6 | 1334 | #ifdef BFD_ASSEMBLER |
d9d6f094 KR |
1335 | #ifdef TC_CONS_FIX_NEW |
1336 | TC_CONS_FIX_NEW (lie->frag, | |
1337 | lie->word_goes_here - lie->frag->fr_literal, | |
1338 | 2, &exp); | |
1339 | #else | |
5ac34ac3 ILT |
1340 | fix_new_exp (lie->frag, |
1341 | lie->word_goes_here - lie->frag->fr_literal, | |
1342 | 2, &exp, 0, BFD_RELOC_NONE); | |
d9d6f094 | 1343 | #endif |
43ca9aa6 KR |
1344 | #else |
1345 | #if defined(TC_SPARC) || defined(TC_A29K) || defined(NEED_FX_R_TYPE) | |
5ac34ac3 ILT |
1346 | fix_new_exp (lie->frag, |
1347 | lie->word_goes_here - lie->frag->fr_literal, | |
1348 | 2, &exp, 0, NO_RELOC); | |
43ca9aa6 | 1349 | #else |
fecd2382 | 1350 | #ifdef TC_NS32K |
5ac34ac3 ILT |
1351 | fix_new_ns32k_exp (lie->frag, |
1352 | lie->word_goes_here - lie->frag->fr_literal, | |
1353 | 2, &exp, 0, 0, 2, 0, 0); | |
343fb08d | 1354 | #else |
5ac34ac3 ILT |
1355 | fix_new_exp (lie->frag, |
1356 | lie->word_goes_here - lie->frag->fr_literal, | |
1357 | 2, &exp, 0, 0); | |
fecd2382 | 1358 | #endif /* TC_NS32K */ |
43ca9aa6 KR |
1359 | #endif /* TC_SPARC|TC_A29K|NEED_FX_R_TYPE */ |
1360 | #endif /* BFD_ASSEMBLER */ | |
6efd877d | 1361 | *prevP = lie->next_broken_word; |
a39116f1 | 1362 | } |
6efd877d KR |
1363 | else |
1364 | prevP = &(lie->next_broken_word); | |
1365 | ||
1366 | for (lie = broken_words; lie;) | |
1367 | { | |
1368 | struct broken_word *untruth; | |
1369 | char *table_ptr; | |
d5364748 KR |
1370 | addressT table_addr; |
1371 | addressT from_addr, to_addr; | |
6efd877d KR |
1372 | int n, m; |
1373 | ||
6efd877d KR |
1374 | fragP = lie->dispfrag; |
1375 | ||
43ca9aa6 | 1376 | /* Find out how many broken_words go here. */ |
6efd877d KR |
1377 | n = 0; |
1378 | for (untruth = lie; untruth && untruth->dispfrag == fragP; untruth = untruth->next_broken_word) | |
1379 | if (untruth->added == 1) | |
1380 | n++; | |
1381 | ||
1382 | table_ptr = lie->dispfrag->fr_opcode; | |
1383 | table_addr = lie->dispfrag->fr_address + (table_ptr - lie->dispfrag->fr_literal); | |
43ca9aa6 KR |
1384 | /* Create the jump around the long jumps. This is a short |
1385 | jump from table_ptr+0 to table_ptr+n*long_jump_size. */ | |
6efd877d KR |
1386 | from_addr = table_addr; |
1387 | to_addr = table_addr + md_short_jump_size + n * md_long_jump_size; | |
1388 | md_create_short_jump (table_ptr, from_addr, to_addr, lie->dispfrag, lie->add); | |
1389 | table_ptr += md_short_jump_size; | |
1390 | table_addr += md_short_jump_size; | |
1391 | ||
1392 | for (m = 0; lie && lie->dispfrag == fragP; m++, lie = lie->next_broken_word) | |
1393 | { | |
1394 | if (lie->added == 2) | |
1395 | continue; | |
1396 | /* Patch the jump table */ | |
1397 | /* This is the offset from ??? to table_ptr+0 */ | |
d5364748 | 1398 | to_addr = table_addr - S_GET_VALUE (lie->sub); |
d9d6f094 KR |
1399 | #ifdef BFD_ASSEMBLER |
1400 | to_addr -= lie->sub->sy_frag->fr_address; | |
1401 | #endif | |
6efd877d KR |
1402 | md_number_to_chars (lie->word_goes_here, to_addr, 2); |
1403 | for (untruth = lie->next_broken_word; untruth && untruth->dispfrag == fragP; untruth = untruth->next_broken_word) | |
1404 | { | |
1405 | if (untruth->use_jump == lie) | |
1406 | md_number_to_chars (untruth->word_goes_here, to_addr, 2); | |
1407 | } | |
1408 | ||
1409 | /* Install the long jump */ | |
1410 | /* this is a long jump from table_ptr+0 to the final target */ | |
1411 | from_addr = table_addr; | |
1412 | to_addr = S_GET_VALUE (lie->add) + lie->addnum; | |
d9d6f094 KR |
1413 | #ifdef BFD_ASSEMBLER |
1414 | to_addr += lie->add->sy_frag->fr_address; | |
1415 | #endif | |
6efd877d KR |
1416 | md_create_long_jump (table_ptr, from_addr, to_addr, lie->dispfrag, lie->add); |
1417 | table_ptr += md_long_jump_size; | |
1418 | table_addr += md_long_jump_size; | |
1419 | } | |
1420 | } | |
1421 | } | |
fecd2382 | 1422 | #endif /* not WORKING_DOT_WORD */ |
6efd877d | 1423 | |
43ca9aa6 | 1424 | #ifndef BFD_ASSEMBLER |
3eb802b5 | 1425 | #ifndef OBJ_VMS |
6efd877d | 1426 | { /* not vms */ |
1cf7548e | 1427 | long object_file_size; |
6efd877d | 1428 | /* |
3eb802b5 ILT |
1429 | * Scan every FixS performing fixups. We had to wait until now to do |
1430 | * this because md_convert_frag() may have made some fixSs. | |
1431 | */ | |
6efd877d KR |
1432 | int trsize, drsize; |
1433 | ||
1434 | subseg_change (SEG_TEXT, 0); | |
d5364748 | 1435 | trsize = md_reloc_size * fixup_segment (text_fix_root, SEG_TEXT); |
6efd877d | 1436 | subseg_change (SEG_DATA, 0); |
d5364748 | 1437 | drsize = md_reloc_size * fixup_segment (data_fix_root, SEG_DATA); |
6efd877d KR |
1438 | H_SET_RELOCATION_SIZE (&headers, trsize, drsize); |
1439 | ||
1440 | /* FIXME move this stuff into the pre-write-hook */ | |
1441 | H_SET_MAGIC_NUMBER (&headers, magic_number_for_object_file); | |
1442 | H_SET_ENTRY_POINT (&headers, 0); | |
1443 | ||
1444 | obj_pre_write_hook (&headers); /* extra coff stuff */ | |
6efd877d KR |
1445 | |
1446 | object_file_size = H_GET_FILE_SIZE (&headers); | |
1447 | next_object_file_charP = the_object_file = xmalloc (object_file_size); | |
1448 | ||
1449 | output_file_create (out_file_name); | |
1450 | ||
1451 | obj_header_append (&next_object_file_charP, &headers); | |
1452 | ||
1453 | know ((next_object_file_charP - the_object_file) == H_GET_HEADER_SIZE (&headers)); | |
1454 | ||
1455 | /* | |
43ca9aa6 KR |
1456 | * Emit code. |
1457 | */ | |
6efd877d KR |
1458 | for (fragP = text_frag_root; fragP; fragP = fragP->fr_next) |
1459 | { | |
1460 | register long count; | |
1461 | register char *fill_literal; | |
1462 | register long fill_size; | |
1463 | ||
1464 | know (fragP->fr_type == rs_fill); | |
1465 | append (&next_object_file_charP, fragP->fr_literal, (unsigned long) fragP->fr_fix); | |
1466 | fill_literal = fragP->fr_literal + fragP->fr_fix; | |
1467 | fill_size = fragP->fr_var; | |
1468 | know (fragP->fr_offset >= 0); | |
1469 | ||
1470 | for (count = fragP->fr_offset; count; count--) | |
1471 | { | |
1472 | append (&next_object_file_charP, fill_literal, (unsigned long) fill_size); | |
1473 | } /* for each */ | |
1474 | ||
1475 | } /* for each code frag. */ | |
1476 | ||
1477 | know ((next_object_file_charP - the_object_file) == (H_GET_HEADER_SIZE (&headers) + H_GET_TEXT_SIZE (&headers) + H_GET_DATA_SIZE (&headers))); | |
1478 | ||
1479 | /* | |
43ca9aa6 KR |
1480 | * Emit relocations. |
1481 | */ | |
6efd877d KR |
1482 | obj_emit_relocations (&next_object_file_charP, text_fix_root, (relax_addressT) 0); |
1483 | know ((next_object_file_charP - the_object_file) == (H_GET_HEADER_SIZE (&headers) + H_GET_TEXT_SIZE (&headers) + H_GET_DATA_SIZE (&headers) + H_GET_TEXT_RELOCATION_SIZE (&headers))); | |
fecd2382 | 1484 | #ifdef TC_I960 |
6efd877d | 1485 | /* Make addresses in data relocation directives relative to beginning of |
43ca9aa6 KR |
1486 | * first data fragment, not end of last text fragment: alignment of the |
1487 | * start of the data segment may place a gap between the segments. | |
1488 | */ | |
6efd877d | 1489 | obj_emit_relocations (&next_object_file_charP, data_fix_root, data0_frchainP->frch_root->fr_address); |
fecd2382 | 1490 | #else /* TC_I960 */ |
6efd877d | 1491 | obj_emit_relocations (&next_object_file_charP, data_fix_root, text_last_frag->fr_address); |
fecd2382 | 1492 | #endif /* TC_I960 */ |
6efd877d KR |
1493 | |
1494 | know ((next_object_file_charP - the_object_file) == (H_GET_HEADER_SIZE (&headers) + H_GET_TEXT_SIZE (&headers) + H_GET_DATA_SIZE (&headers) + H_GET_TEXT_RELOCATION_SIZE (&headers) + H_GET_DATA_RELOCATION_SIZE (&headers))); | |
1495 | ||
1496 | /* | |
43ca9aa6 KR |
1497 | * Emit line number entries. |
1498 | */ | |
6efd877d KR |
1499 | OBJ_EMIT_LINENO (&next_object_file_charP, lineno_rootP, the_object_file); |
1500 | know ((next_object_file_charP - the_object_file) == (H_GET_HEADER_SIZE (&headers) + H_GET_TEXT_SIZE (&headers) + H_GET_DATA_SIZE (&headers) + H_GET_TEXT_RELOCATION_SIZE (&headers) + H_GET_DATA_RELOCATION_SIZE (&headers) + H_GET_LINENO_SIZE (&headers))); | |
1501 | ||
1502 | /* | |
3eb802b5 ILT |
1503 | * Emit symbols. |
1504 | */ | |
6efd877d KR |
1505 | obj_emit_symbols (&next_object_file_charP, symbol_rootP); |
1506 | know ((next_object_file_charP - the_object_file) == (H_GET_HEADER_SIZE (&headers) + H_GET_TEXT_SIZE (&headers) + H_GET_DATA_SIZE (&headers) + H_GET_TEXT_RELOCATION_SIZE (&headers) + H_GET_DATA_RELOCATION_SIZE (&headers) + H_GET_LINENO_SIZE (&headers) + H_GET_SYMBOL_TABLE_SIZE (&headers))); | |
1507 | ||
1508 | /* | |
3eb802b5 ILT |
1509 | * Emit strings. |
1510 | */ | |
6efd877d KR |
1511 | |
1512 | if (string_byte_count > 0) | |
1513 | { | |
1514 | obj_emit_strings (&next_object_file_charP); | |
1515 | } /* only if we have a string table */ | |
1516 | ||
45432836 | 1517 | #ifdef BFD_HEADERS |
6efd877d KR |
1518 | bfd_seek (stdoutput, 0, 0); |
1519 | bfd_write (the_object_file, 1, object_file_size, stdoutput); | |
45432836 | 1520 | #else |
6efd877d KR |
1521 | |
1522 | /* Write the data to the file */ | |
1523 | output_file_append (the_object_file, object_file_size, out_file_name); | |
45432836 | 1524 | #endif |
6efd877d KR |
1525 | } /* non vms output */ |
1526 | #else /* VMS */ | |
1527 | /* | |
3eb802b5 ILT |
1528 | * Now do the VMS-dependent part of writing the object file |
1529 | */ | |
85825401 ILT |
1530 | VMS_write_object_file (H_GET_TEXT_SIZE (&headers), |
1531 | H_GET_DATA_SIZE (&headers), | |
1532 | H_GET_BSS_SIZE (&headers), | |
3eb802b5 | 1533 | text_frag_root, data_frag_root); |
6efd877d | 1534 | #endif /* VMS */ |
43ca9aa6 | 1535 | #else /* BFD_ASSEMBLER */ |
6efd877d | 1536 | |
4acf8c78 KR |
1537 | /* Resolve symbol values. This needs to be done before processing |
1538 | the relocations. */ | |
1539 | if (symbol_rootP) | |
1540 | { | |
1541 | symbolS *symp; | |
1542 | ||
1543 | for (symp = symbol_rootP; symp; symp = symbol_next (symp)) | |
1544 | if (!symp->sy_resolved) | |
1545 | resolve_symbol_value (symp); | |
1546 | } | |
1547 | ||
d5364748 KR |
1548 | bfd_map_over_sections (stdoutput, adjust_reloc_syms, (char *)0); |
1549 | ||
43ca9aa6 KR |
1550 | /* Set up symbol table, and write it out. */ |
1551 | if (symbol_rootP) | |
1552 | { | |
43ca9aa6 KR |
1553 | symbolS *symp; |
1554 | ||
1555 | for (symp = symbol_rootP; symp; symp = symbol_next (symp)) | |
1556 | { | |
262b22cd ILT |
1557 | int punt = 0; |
1558 | ||
4acf8c78 KR |
1559 | /* Do it again, because adjust_reloc_syms might introduce |
1560 | more symbols. They'll probably only be section symbols, | |
1561 | but they'll still need to have the values computed. */ | |
5868b1fe ILT |
1562 | if (! symp->sy_resolved) |
1563 | { | |
5ac34ac3 | 1564 | if (symp->sy_value.X_op == O_constant) |
5868b1fe ILT |
1565 | { |
1566 | /* This is the normal case; skip the call. */ | |
1567 | S_SET_VALUE (symp, | |
1568 | (S_GET_VALUE (symp) | |
1569 | + symp->sy_frag->fr_address)); | |
1570 | symp->sy_resolved = 1; | |
1571 | } | |
1572 | else | |
1573 | resolve_symbol_value (symp); | |
1574 | } | |
1575 | ||
43ca9aa6 KR |
1576 | /* So far, common symbols have been treated like undefined symbols. |
1577 | Put them in the common section now. */ | |
1578 | if (S_IS_DEFINED (symp) == 0 | |
1579 | && S_GET_VALUE (symp) != 0) | |
d9d6f094 | 1580 | S_SET_SEGMENT (symp, bfd_com_section_ptr); |
43ca9aa6 | 1581 | #if 0 |
5868b1fe | 1582 | printf ("symbol `%s'\n\t@%x: value=%d flags=%x seg=%s\n", |
43ca9aa6 KR |
1583 | S_GET_NAME (symp), symp, |
1584 | S_GET_VALUE (symp), | |
d5364748 | 1585 | symp->bsym->flags, |
43ca9aa6 KR |
1586 | segment_name (symp->bsym->section)); |
1587 | #endif | |
335d35c8 | 1588 | |
80aab579 | 1589 | #ifdef obj_frob_symbol |
262b22cd | 1590 | obj_frob_symbol (symp, punt); |
43ca9aa6 KR |
1591 | #endif |
1592 | #ifdef tc_frob_symbol | |
262b22cd | 1593 | if (! punt || symp->sy_used_in_reloc) |
335d35c8 | 1594 | tc_frob_symbol (symp, punt); |
43ca9aa6 | 1595 | #endif |
80aab579 | 1596 | |
262b22cd ILT |
1597 | /* If we don't want to keep this symbol, splice it out of |
1598 | the chain now. If EMIT_SECTION_SYMBOLS is 0, we never | |
1599 | want section symbols. Otherwise, we skip local symbols | |
1600 | and symbols that the frob_symbol macros told us to punt, | |
1601 | but we keep such symbols if they are used in relocs. */ | |
1602 | if ((! EMIT_SECTION_SYMBOLS | |
1603 | && (symp->bsym->flags & BSF_SECTION_SYM) != 0) | |
1cf7548e KR |
1604 | /* Note that S_IS_EXTERN and S_IS_LOCAL are not always |
1605 | opposites. Sometimes the former checks flags and the | |
1606 | latter examines the name... */ | |
1607 | || (!S_IS_EXTERN (symp) | |
1608 | && (S_IS_LOCAL (symp) || punt) | |
262b22cd | 1609 | && ! symp->sy_used_in_reloc)) |
43ca9aa6 | 1610 | { |
1cf7548e KR |
1611 | symbol_remove (symp, &symbol_rootP, &symbol_lastP); |
1612 | /* After symbol_remove, symbol_next(symp) still returns | |
1613 | the one that came after it in the chain. So we don't | |
1614 | need to do any extra cleanup work here. */ | |
262b22cd | 1615 | |
262b22cd | 1616 | continue; |
43ca9aa6 | 1617 | } |
85051959 | 1618 | |
80aab579 ILT |
1619 | /* Make sure we really got a value for the symbol. */ |
1620 | if (! symp->sy_resolved) | |
1621 | { | |
1622 | as_bad ("can't resolve value for symbol \"%s\"", | |
1623 | S_GET_NAME (symp)); | |
1624 | symp->sy_resolved = 1; | |
1625 | } | |
1626 | ||
85051959 ILT |
1627 | /* Set the value into the BFD symbol. Up til now the value |
1628 | has only been kept in the gas symbolS struct. */ | |
1629 | symp->bsym->value = S_GET_VALUE (symp); | |
43ca9aa6 KR |
1630 | } |
1631 | } | |
1632 | ||
def66e24 DM |
1633 | /* Now do any format-specific adjustments to the symbol table, such |
1634 | as adding file symbols. */ | |
1635 | #ifdef obj_adjust_symtab | |
1636 | obj_adjust_symtab (); | |
1637 | #endif | |
1638 | ||
1639 | /* Now that all the sizes are known, and contents correct, we can | |
1640 | start writing to the file. */ | |
1641 | set_symtab (); | |
1642 | ||
1cf7548e KR |
1643 | /* If *_frob_file changes the symbol value at this point, it is |
1644 | responsible for moving the changed value into symp->bsym->value | |
1645 | as well. Hopefully all symbol value changing can be done in | |
1646 | *_frob_symbol. */ | |
c79e67a3 KR |
1647 | #ifdef tc_frob_file |
1648 | tc_frob_file (); | |
1649 | #endif | |
f2f7d044 ILT |
1650 | #ifdef obj_frob_file |
1651 | obj_frob_file (); | |
1652 | #endif | |
1653 | ||
8d6c34a1 KR |
1654 | bfd_map_over_sections (stdoutput, write_relocs, (char *) 0); |
1655 | ||
43ca9aa6 | 1656 | bfd_map_over_sections (stdoutput, write_contents, (char *) 0); |
43ca9aa6 KR |
1657 | #endif /* BFD_ASSEMBLER */ |
1658 | } | |
d5364748 | 1659 | #endif /* ! BFD */ |
fecd2382 RP |
1660 | |
1661 | /* | |
1662 | * relax_segment() | |
1663 | * | |
1664 | * Now we have a segment, not a crowd of sub-segments, we can make fr_address | |
1665 | * values. | |
1666 | * | |
1667 | * Relax the frags. | |
1668 | * | |
1669 | * After this, all frags in this segment have addresses that are correct | |
1670 | * within the segment. Since segments live in different file addresses, | |
1671 | * these frag addresses may not be the same as final object-file addresses. | |
1672 | */ | |
45432836 | 1673 | |
a58374d7 ILT |
1674 | #ifndef md_relax_frag |
1675 | ||
d5364748 | 1676 | /* Subroutines of relax_segment. */ |
43ca9aa6 KR |
1677 | static int |
1678 | is_dnrange (f1, f2) | |
1679 | struct frag *f1; | |
1680 | struct frag *f2; | |
1681 | { | |
1682 | for (; f1; f1 = f1->fr_next) | |
1683 | if (f1->fr_next == f2) | |
1684 | return 1; | |
1685 | return 0; | |
1686 | } | |
1687 | ||
a58374d7 ILT |
1688 | #endif /* ! defined (md_relax_frag) */ |
1689 | ||
43ca9aa6 | 1690 | /* Relax_align. Advance location counter to next address that has 'alignment' |
d5364748 | 1691 | lowest order bits all 0s, return size of adjustment made. */ |
43ca9aa6 KR |
1692 | static relax_addressT |
1693 | relax_align (address, alignment) | |
1694 | register relax_addressT address; /* Address now. */ | |
d5364748 | 1695 | register int alignment; /* Alignment (binary). */ |
43ca9aa6 KR |
1696 | { |
1697 | relax_addressT mask; | |
1698 | relax_addressT new_address; | |
1699 | ||
1700 | mask = ~((~0) << alignment); | |
1701 | new_address = (address + mask) & (~mask); | |
1702 | if (linkrelax) | |
1703 | /* We must provide lots of padding, so the linker can discard it | |
1704 | when needed. The linker will not add extra space, ever. */ | |
1705 | new_address += (1 << alignment); | |
1706 | return (new_address - address); | |
1707 | } | |
45432836 | 1708 | |
6efd877d KR |
1709 | void |
1710 | relax_segment (segment_frag_root, segment) | |
1711 | struct frag *segment_frag_root; | |
43ca9aa6 | 1712 | segT segment; |
fecd2382 | 1713 | { |
6efd877d KR |
1714 | register struct frag *fragP; |
1715 | register relax_addressT address; | |
43ca9aa6 | 1716 | #if !defined (MANY_SEGMENTS) && !defined (BFD_ASSEMBLER) |
6efd877d | 1717 | know (segment == SEG_DATA || segment == SEG_TEXT || segment == SEG_BSS); |
45432836 | 1718 | #endif |
6efd877d KR |
1719 | /* In case md_estimate_size_before_relax() wants to make fixSs. */ |
1720 | subseg_change (segment, 0); | |
1721 | ||
7f2cb270 KR |
1722 | /* For each frag in segment: count and store (a 1st guess of) |
1723 | fr_address. */ | |
6efd877d KR |
1724 | address = 0; |
1725 | for (fragP = segment_frag_root; fragP; fragP = fragP->fr_next) | |
1726 | { | |
1727 | fragP->fr_address = address; | |
1728 | address += fragP->fr_fix; | |
1729 | ||
1730 | switch (fragP->fr_type) | |
1731 | { | |
1732 | case rs_fill: | |
1733 | address += fragP->fr_offset * fragP->fr_var; | |
1734 | break; | |
1735 | ||
1736 | case rs_align: | |
cd3b81bd | 1737 | case rs_align_code: |
98c6bbbe KR |
1738 | { |
1739 | int offset = relax_align (address, (int) fragP->fr_offset); | |
1740 | if (offset % fragP->fr_var != 0) | |
1741 | { | |
262b22cd ILT |
1742 | as_bad ("alignment padding (%d bytes) not a multiple of %ld", |
1743 | offset, (long) fragP->fr_var); | |
98c6bbbe KR |
1744 | offset -= (offset % fragP->fr_var); |
1745 | } | |
1746 | address += offset; | |
1747 | } | |
6efd877d KR |
1748 | break; |
1749 | ||
1750 | case rs_org: | |
cd3b81bd | 1751 | case rs_space: |
7f2cb270 | 1752 | /* Assume .org is nugatory. It will grow with 1st relax. */ |
6efd877d KR |
1753 | break; |
1754 | ||
1755 | case rs_machine_dependent: | |
1756 | address += md_estimate_size_before_relax (fragP, segment); | |
1757 | break; | |
1758 | ||
fecd2382 | 1759 | #ifndef WORKING_DOT_WORD |
6efd877d KR |
1760 | /* Broken words don't concern us yet */ |
1761 | case rs_broken_word: | |
1762 | break; | |
fecd2382 | 1763 | #endif |
6efd877d KR |
1764 | |
1765 | default: | |
1766 | BAD_CASE (fragP->fr_type); | |
1767 | break; | |
1768 | } /* switch(fr_type) */ | |
1769 | } /* for each frag in the segment */ | |
1770 | ||
7f2cb270 | 1771 | /* Do relax(). */ |
6efd877d | 1772 | { |
7f2cb270 | 1773 | long stretch; /* May be any size, 0 or negative. */ |
6efd877d KR |
1774 | /* Cumulative number of addresses we have */ |
1775 | /* relaxed this pass. */ | |
1776 | /* We may have relaxed more than one address. */ | |
7f2cb270 KR |
1777 | long stretched; /* Have we stretched on this pass? */ |
1778 | /* This is 'cuz stretch may be zero, when, in fact some piece of code | |
1779 | grew, and another shrank. If a branch instruction doesn't fit anymore, | |
1780 | we could be scrod. */ | |
6efd877d KR |
1781 | |
1782 | do | |
1783 | { | |
1784 | stretch = stretched = 0; | |
1785 | for (fragP = segment_frag_root; fragP; fragP = fragP->fr_next) | |
1786 | { | |
7f2cb270 KR |
1787 | long growth = 0; |
1788 | unsigned long was_address; | |
1789 | long offset; | |
1790 | symbolS *symbolP; | |
1791 | long target; | |
1792 | long after; | |
6efd877d KR |
1793 | |
1794 | was_address = fragP->fr_address; | |
1795 | address = fragP->fr_address += stretch; | |
1796 | symbolP = fragP->fr_symbol; | |
1797 | offset = fragP->fr_offset; | |
6efd877d KR |
1798 | |
1799 | switch (fragP->fr_type) | |
1800 | { | |
1801 | case rs_fill: /* .fill never relaxes. */ | |
1802 | growth = 0; | |
1803 | break; | |
1804 | ||
fecd2382 | 1805 | #ifndef WORKING_DOT_WORD |
6efd877d | 1806 | /* JF: This is RMS's idea. I do *NOT* want to be blamed |
7f2cb270 KR |
1807 | for it I do not want to write it. I do not want to have |
1808 | anything to do with it. This is not the proper way to | |
1809 | implement this misfeature. */ | |
6efd877d KR |
1810 | case rs_broken_word: |
1811 | { | |
1812 | struct broken_word *lie; | |
1813 | struct broken_word *untruth; | |
6efd877d KR |
1814 | |
1815 | /* Yes this is ugly (storing the broken_word pointer | |
7f2cb270 KR |
1816 | in the symbol slot). Still, this whole chunk of |
1817 | code is ugly, and I don't feel like doing anything | |
1818 | about it. Think of it as stubbornness in action. */ | |
6efd877d KR |
1819 | growth = 0; |
1820 | for (lie = (struct broken_word *) (fragP->fr_symbol); | |
1821 | lie && lie->dispfrag == fragP; | |
1822 | lie = lie->next_broken_word) | |
1823 | { | |
1824 | ||
1825 | if (lie->added) | |
1826 | continue; | |
1827 | ||
7f2cb270 KR |
1828 | offset = (lie->add->sy_frag->fr_address |
1829 | + S_GET_VALUE (lie->add) | |
1830 | + lie->addnum | |
1831 | - (lie->sub->sy_frag->fr_address | |
1832 | + S_GET_VALUE (lie->sub))); | |
6efd877d KR |
1833 | if (offset <= -32768 || offset >= 32767) |
1834 | { | |
def66e24 | 1835 | if (flag_warn_displacement) |
d5364748 KR |
1836 | { |
1837 | char buf[50]; | |
80aab579 | 1838 | sprint_value (buf, (addressT) lie->addnum); |
d5364748 KR |
1839 | as_warn (".word %s-%s+%s didn't fit", |
1840 | S_GET_NAME (lie->add), | |
1841 | S_GET_NAME (lie->sub), | |
1842 | buf); | |
1843 | } | |
6efd877d KR |
1844 | lie->added = 1; |
1845 | if (fragP->fr_subtype == 0) | |
1846 | { | |
1847 | fragP->fr_subtype++; | |
1848 | growth += md_short_jump_size; | |
1849 | } | |
7f2cb270 KR |
1850 | for (untruth = lie->next_broken_word; |
1851 | untruth && untruth->dispfrag == lie->dispfrag; | |
1852 | untruth = untruth->next_broken_word) | |
6efd877d KR |
1853 | if ((untruth->add->sy_frag == lie->add->sy_frag) |
1854 | && S_GET_VALUE (untruth->add) == S_GET_VALUE (lie->add)) | |
1855 | { | |
1856 | untruth->added = 2; | |
1857 | untruth->use_jump = lie; | |
1858 | } | |
1859 | growth += md_long_jump_size; | |
1860 | } | |
1861 | } | |
1862 | ||
1863 | break; | |
1864 | } /* case rs_broken_word */ | |
fecd2382 | 1865 | #endif |
6efd877d | 1866 | case rs_align: |
cd3b81bd | 1867 | case rs_align_code: |
43ca9aa6 KR |
1868 | growth = (relax_align ((relax_addressT) (address |
1869 | + fragP->fr_fix), | |
d5364748 | 1870 | (int) offset) |
43ca9aa6 KR |
1871 | - relax_align ((relax_addressT) (was_address |
1872 | + fragP->fr_fix), | |
d5364748 | 1873 | (int) offset)); |
6efd877d KR |
1874 | break; |
1875 | ||
1876 | case rs_org: | |
1877 | target = offset; | |
1878 | ||
1879 | if (symbolP) | |
1880 | { | |
43ca9aa6 KR |
1881 | #if !defined (MANY_SEGMENTS) && !defined (BFD_ASSEMBLER) |
1882 | know ((S_GET_SEGMENT (symbolP) == SEG_ABSOLUTE) | |
1883 | || (S_GET_SEGMENT (symbolP) == SEG_DATA) | |
1884 | || (S_GET_SEGMENT (symbolP) == SEG_TEXT) | |
1885 | || S_GET_SEGMENT (symbolP) == SEG_BSS); | |
6efd877d | 1886 | know (symbolP->sy_frag); |
43ca9aa6 KR |
1887 | know (!(S_GET_SEGMENT (symbolP) == SEG_ABSOLUTE) |
1888 | || (symbolP->sy_frag == &zero_address_frag)); | |
45432836 | 1889 | #endif |
6efd877d KR |
1890 | target += S_GET_VALUE (symbolP) |
1891 | + symbolP->sy_frag->fr_address; | |
1892 | } /* if we have a symbol */ | |
1893 | ||
1894 | know (fragP->fr_next); | |
1895 | after = fragP->fr_next->fr_address; | |
1896 | growth = ((target - after) > 0) ? (target - after) : 0; | |
43ca9aa6 KR |
1897 | /* Growth may be negative, but variable part of frag |
1898 | cannot have fewer than 0 chars. That is, we can't | |
1899 | .org backwards. */ | |
6efd877d KR |
1900 | |
1901 | growth -= stretch; /* This is an absolute growth factor */ | |
1902 | break; | |
1903 | ||
cd3b81bd KR |
1904 | case rs_space: |
1905 | if (symbolP) | |
1906 | { | |
1907 | growth = S_GET_VALUE (symbolP); | |
1908 | if (symbolP->sy_frag != &zero_address_frag) | |
1909 | as_bad (".space specifies non-absolute value"); | |
1910 | fragP->fr_symbol = 0; | |
1911 | if (growth < 0) | |
1912 | { | |
1913 | as_warn (".space or .fill with negative value, ignored"); | |
1914 | growth = 0; | |
1915 | } | |
1916 | } | |
1917 | else | |
1918 | growth = 0; | |
1919 | break; | |
1920 | ||
6efd877d | 1921 | case rs_machine_dependent: |
a58374d7 ILT |
1922 | #ifdef md_relax_frag |
1923 | growth = md_relax_frag (fragP, stretch); | |
1924 | #else | |
1925 | /* The default way to relax a frag is to look through | |
1926 | md_relax_table. */ | |
6efd877d | 1927 | { |
7f2cb270 KR |
1928 | const relax_typeS *this_type; |
1929 | const relax_typeS *start_type; | |
1930 | relax_substateT next_state; | |
1931 | relax_substateT this_state; | |
80aab579 | 1932 | long aim; |
6efd877d | 1933 | |
7f2cb270 KR |
1934 | this_state = fragP->fr_subtype; |
1935 | start_type = this_type = md_relax_table + this_state; | |
6efd877d KR |
1936 | target = offset; |
1937 | ||
1938 | if (symbolP) | |
1939 | { | |
80aab579 | 1940 | #ifndef DIFF_EXPR_OK |
43ca9aa6 KR |
1941 | #if !defined (MANY_SEGMENTS) && !defined (BFD_ASSEMBLER) |
1942 | know ((S_GET_SEGMENT (symbolP) == SEG_ABSOLUTE) | |
1943 | || (S_GET_SEGMENT (symbolP) == SEG_DATA) | |
1944 | || (S_GET_SEGMENT (symbolP) == SEG_BSS) | |
1945 | || (S_GET_SEGMENT (symbolP) == SEG_TEXT)); | |
45432836 | 1946 | #endif |
6efd877d | 1947 | know (symbolP->sy_frag); |
80aab579 | 1948 | #endif |
43ca9aa6 KR |
1949 | know (!(S_GET_SEGMENT (symbolP) == absolute_section) |
1950 | || symbolP->sy_frag == &zero_address_frag); | |
6efd877d KR |
1951 | target += |
1952 | S_GET_VALUE (symbolP) | |
1953 | + symbolP->sy_frag->fr_address; | |
1954 | ||
1955 | /* If frag has yet to be reached on this pass, | |
7f2cb270 KR |
1956 | assume it will move by STRETCH just as we did. |
1957 | If this is not so, it will be because some frag | |
d5364748 KR |
1958 | between grows, and that will force another pass. |
1959 | ||
1960 | Beware zero-length frags. | |
1961 | ||
1962 | There should be a faster way to do this. */ | |
6efd877d KR |
1963 | |
1964 | if (symbolP->sy_frag->fr_address >= was_address | |
1965 | && is_dnrange (fragP, symbolP->sy_frag)) | |
1966 | { | |
1967 | target += stretch; | |
7f2cb270 | 1968 | } |
d5364748 | 1969 | } |
6efd877d KR |
1970 | |
1971 | aim = target - address - fragP->fr_fix; | |
d9d6f094 KR |
1972 | #ifdef TC_PCREL_ADJUST |
1973 | /* Currently only the ns32k family needs this */ | |
1974 | aim += TC_PCREL_ADJUST(fragP); | |
1975 | #else | |
1976 | /* This machine doesn't want to use pcrel_adjust. | |
1977 | In that case, pcrel_adjust should be zero. */ | |
1978 | assert (fragP->fr_pcrel_adjust == 0); | |
d5364748 | 1979 | #endif |
6efd877d KR |
1980 | |
1981 | if (aim < 0) | |
1982 | { | |
1983 | /* Look backwards. */ | |
1984 | for (next_state = this_type->rlx_more; next_state;) | |
7f2cb270 KR |
1985 | if (aim >= this_type->rlx_backward) |
1986 | next_state = 0; | |
1987 | else | |
1988 | { | |
1989 | /* Grow to next state. */ | |
1990 | this_state = next_state; | |
1991 | this_type = md_relax_table + this_state; | |
1992 | next_state = this_type->rlx_more; | |
1993 | } | |
6efd877d KR |
1994 | } |
1995 | else | |
1996 | { | |
a39116f1 | 1997 | #ifdef M68K_AIM_KLUDGE |
6efd877d | 1998 | M68K_AIM_KLUDGE (aim, this_state, this_type); |
fecd2382 | 1999 | #endif |
6efd877d KR |
2000 | /* Look forwards. */ |
2001 | for (next_state = this_type->rlx_more; next_state;) | |
7f2cb270 KR |
2002 | if (aim <= this_type->rlx_forward) |
2003 | next_state = 0; | |
2004 | else | |
2005 | { | |
2006 | /* Grow to next state. */ | |
2007 | this_state = next_state; | |
2008 | this_type = md_relax_table + this_state; | |
2009 | next_state = this_type->rlx_more; | |
2010 | } | |
6efd877d KR |
2011 | } |
2012 | ||
7f2cb270 KR |
2013 | growth = this_type->rlx_length - start_type->rlx_length; |
2014 | if (growth != 0) | |
6efd877d | 2015 | fragP->fr_subtype = this_state; |
7f2cb270 | 2016 | } |
a58374d7 | 2017 | #endif |
7f2cb270 | 2018 | break; |
6efd877d KR |
2019 | |
2020 | default: | |
2021 | BAD_CASE (fragP->fr_type); | |
2022 | break; | |
2023 | } | |
2024 | if (growth) | |
2025 | { | |
2026 | stretch += growth; | |
2027 | stretched++; | |
2028 | } | |
2029 | } /* For each frag in the segment. */ | |
2030 | } | |
2031 | while (stretched); /* Until nothing further to relax. */ | |
2032 | } /* do_relax */ | |
2033 | ||
2034 | /* | |
7f2cb270 KR |
2035 | * We now have valid fr_address'es for each frag. |
2036 | */ | |
6efd877d KR |
2037 | |
2038 | /* | |
7f2cb270 KR |
2039 | * All fr_address's are correct, relative to their own segment. |
2040 | * We have made all the fixS we will ever make. | |
2041 | */ | |
6efd877d | 2042 | } /* relax_segment() */ |
fecd2382 | 2043 | |
80aab579 ILT |
2044 | #if defined (BFD_ASSEMBLER) || !defined (BFD) |
2045 | ||
d9d6f094 KR |
2046 | #ifndef TC_RELOC_RTSYM_LOC_FIXUP |
2047 | #define TC_RELOC_RTSYM_LOC_FIXUP(X) (1) | |
2048 | #endif | |
2049 | ||
fecd2382 | 2050 | /* fixup_segment() |
6efd877d | 2051 | |
fecd2382 RP |
2052 | Go through all the fixS's in a segment and see which ones can be |
2053 | handled now. (These consist of fixS where we have since discovered | |
2054 | the value of a symbol, or the address of the frag involved.) | |
2055 | For each one, call md_apply_fix to put the fix into the frag data. | |
6efd877d | 2056 | |
fecd2382 RP |
2057 | Result is a count of how many relocation structs will be needed to |
2058 | handle the remaining fixS's that we couldn't completely handle here. | |
2059 | These will be output later by emit_relocations(). */ | |
2060 | ||
09952cd9 | 2061 | static long |
6efd877d | 2062 | fixup_segment (fixP, this_segment_type) |
09952cd9 | 2063 | register fixS *fixP; |
6efd877d | 2064 | segT this_segment_type; /* N_TYPE bits for segment. */ |
fecd2382 | 2065 | { |
f5c32424 KR |
2066 | long seg_reloc_count = 0; |
2067 | symbolS *add_symbolP; | |
2068 | symbolS *sub_symbolP; | |
d5364748 | 2069 | valueT add_number; |
f5c32424 KR |
2070 | int size; |
2071 | char *place; | |
2072 | long where; | |
a55774a1 | 2073 | int pcrel, plt; |
f5c32424 KR |
2074 | fragS *fragP; |
2075 | segT add_symbol_segment = absolute_section; | |
2076 | ||
2077 | /* If the linker is doing the relaxing, we must not do any fixups. | |
2078 | ||
2079 | Well, strictly speaking that's not true -- we could do any that are | |
2080 | PC-relative and don't cross regions that could change size. And for the | |
2081 | i960 (the only machine for which we've got a relaxing linker right now), | |
2082 | we might be able to turn callx/callj into bal anyways in cases where we | |
2083 | know the maximum displacement. */ | |
6efd877d | 2084 | if (linkrelax) |
f5c32424 KR |
2085 | { |
2086 | for (; fixP; fixP = fixP->fx_next) | |
2087 | seg_reloc_count++; | |
2088 | TC_ADJUST_RELOC_COUNT (fixP, seg_reloc_count); | |
2089 | return seg_reloc_count; | |
2090 | } | |
6efd877d | 2091 | |
f5c32424 KR |
2092 | for (; fixP; fixP = fixP->fx_next) |
2093 | { | |
a55774a1 KR |
2094 | #ifdef DEBUG5 |
2095 | fprintf (stderr, "\nprocessing fixup:\n"); | |
2096 | print_fixup (fixP); | |
2097 | #endif | |
2098 | ||
f5c32424 KR |
2099 | fragP = fixP->fx_frag; |
2100 | know (fragP); | |
2101 | where = fixP->fx_where; | |
2102 | place = fragP->fr_literal + where; | |
2103 | size = fixP->fx_size; | |
2104 | add_symbolP = fixP->fx_addsy; | |
2105 | #ifdef TC_VALIDATE_FIX | |
2106 | TC_VALIDATE_FIX (fixP, this_segment_type, skip); | |
fecd2382 | 2107 | #endif |
f5c32424 KR |
2108 | sub_symbolP = fixP->fx_subsy; |
2109 | add_number = fixP->fx_offset; | |
2110 | pcrel = fixP->fx_pcrel; | |
a55774a1 KR |
2111 | plt = fixP->fx_plt; |
2112 | ||
f5c32424 KR |
2113 | if (add_symbolP) |
2114 | add_symbol_segment = S_GET_SEGMENT (add_symbolP); | |
2115 | ||
2116 | if (sub_symbolP) | |
2117 | { | |
2118 | if (!add_symbolP) | |
2119 | { | |
2120 | /* Its just -sym */ | |
2121 | if (S_GET_SEGMENT (sub_symbolP) == absolute_section) | |
6efd877d | 2122 | add_number -= S_GET_VALUE (sub_symbolP); |
f5c32424 KR |
2123 | else if (pcrel |
2124 | && S_GET_SEGMENT (sub_symbolP) == this_segment_type) | |
2125 | { | |
2126 | /* Should try converting to a constant. */ | |
2127 | goto bad_sub_reloc; | |
2128 | } | |
2129 | else | |
2130 | bad_sub_reloc: | |
741f4d66 KR |
2131 | as_bad_where (fixP->fx_file, fixP->fx_line, |
2132 | "Negative of non-absolute symbol %s", | |
2133 | S_GET_NAME (sub_symbolP)); | |
f5c32424 KR |
2134 | } |
2135 | else if ((S_GET_SEGMENT (sub_symbolP) == add_symbol_segment) | |
2136 | && (SEG_NORMAL (add_symbol_segment) | |
2137 | || (add_symbol_segment == absolute_section))) | |
2138 | { | |
2139 | /* Difference of 2 symbols from same segment. | |
2140 | Can't make difference of 2 undefineds: 'value' means | |
2141 | something different for N_UNDF. */ | |
fecd2382 | 2142 | #ifdef TC_I960 |
f5c32424 KR |
2143 | /* Makes no sense to use the difference of 2 arbitrary symbols |
2144 | as the target of a call instruction. */ | |
2145 | if (fixP->fx_tcbit) | |
741f4d66 KR |
2146 | as_bad_where (fixP->fx_file, fixP->fx_line, |
2147 | "callj to difference of 2 symbols"); | |
6efd877d | 2148 | #endif /* TC_I960 */ |
f5c32424 KR |
2149 | add_number += S_GET_VALUE (add_symbolP) - |
2150 | S_GET_VALUE (sub_symbolP); | |
6efd877d | 2151 | |
f5c32424 | 2152 | add_symbolP = NULL; |
335d35c8 | 2153 | |
f5c32424 KR |
2154 | /* Let the target machine make the final determination |
2155 | as to whether or not a relocation will be needed to | |
2156 | handle this fixup. */ | |
2157 | if (!TC_FORCE_RELOCATION (fixP)) | |
98c6bbbe KR |
2158 | { |
2159 | fixP->fx_addsy = NULL; | |
2160 | } | |
f5c32424 KR |
2161 | } |
2162 | else | |
2163 | { | |
2164 | /* Different segments in subtraction. */ | |
2165 | know (!(S_IS_EXTERNAL (sub_symbolP) | |
2166 | && (S_GET_SEGMENT (sub_symbolP) == absolute_section))); | |
2167 | ||
2168 | if ((S_GET_SEGMENT (sub_symbolP) == absolute_section)) | |
2169 | add_number -= S_GET_VALUE (sub_symbolP); | |
6efd877d | 2170 | |
80aab579 | 2171 | #ifdef DIFF_EXPR_OK |
f5c32424 KR |
2172 | else if (S_GET_SEGMENT (sub_symbolP) == this_segment_type |
2173 | #if 0 /* Do this even if it's already described as pc-relative. For example, | |
2174 | on the m68k, an operand of "pc@(foo-.-2)" should address "foo" in a | |
2175 | pc-relative mode. */ | |
2176 | && pcrel | |
0f894895 | 2177 | #endif |
f5c32424 KR |
2178 | ) |
2179 | { | |
2180 | /* Make it pc-relative. */ | |
2181 | add_number += (md_pcrel_from (fixP) | |
2182 | - S_GET_VALUE (sub_symbolP)); | |
2183 | pcrel = 1; | |
2184 | fixP->fx_pcrel = 1; | |
2185 | sub_symbolP = 0; | |
2186 | fixP->fx_subsy = 0; | |
2187 | } | |
98c6bbbe KR |
2188 | #endif |
2189 | #ifdef BFD_ASSEMBLER | |
2190 | else if (fixP->fx_r_type == BFD_RELOC_GPREL32 | |
2191 | || fixP->fx_r_type == BFD_RELOC_GPREL16) | |
2192 | { | |
2193 | /* Leave it alone. */ | |
2194 | } | |
80aab579 | 2195 | #endif |
f5c32424 KR |
2196 | else |
2197 | { | |
2198 | char buf[50]; | |
2199 | sprint_value (buf, fragP->fr_address + where); | |
741f4d66 KR |
2200 | as_bad_where (fixP->fx_file, fixP->fx_line, |
2201 | "Can't emit reloc {- %s-seg symbol \"%s\"} @ file address %s.", | |
2202 | segment_name (S_GET_SEGMENT (sub_symbolP)), | |
2203 | S_GET_NAME (sub_symbolP), buf); | |
f5c32424 KR |
2204 | } |
2205 | } | |
2206 | } | |
6efd877d | 2207 | |
f5c32424 KR |
2208 | if (add_symbolP) |
2209 | { | |
a55774a1 | 2210 | if (add_symbol_segment == this_segment_type && pcrel && !plt |
d9d6f094 | 2211 | && TC_RELOC_RTSYM_LOC_FIXUP (fixP->fx_r_type)) |
f5c32424 KR |
2212 | { |
2213 | /* | |
2214 | * This fixup was made when the symbol's segment was | |
2215 | * SEG_UNKNOWN, but it is now in the local segment. | |
2216 | * So we know how to do the address without relocation. | |
2217 | */ | |
fecd2382 | 2218 | #ifdef TC_I960 |
f5c32424 KR |
2219 | /* reloc_callj() may replace a 'call' with a 'calls' or a |
2220 | 'bal', in which cases it modifies *fixP as appropriate. | |
2221 | In the case of a 'calls', no further work is required, | |
2222 | and *fixP has been set up to make the rest of the code | |
2223 | below a no-op. */ | |
2224 | reloc_callj (fixP); | |
fecd2382 | 2225 | #endif /* TC_I960 */ |
6efd877d | 2226 | |
f5c32424 KR |
2227 | add_number += S_GET_VALUE (add_symbolP); |
2228 | add_number -= md_pcrel_from (fixP); | |
2229 | pcrel = 0; /* Lie. Don't want further pcrel processing. */ | |
2230 | ||
2231 | /* Let the target machine make the final determination | |
2232 | as to whether or not a relocation will be needed to | |
2233 | handle this fixup. */ | |
2234 | if (!TC_FORCE_RELOCATION (fixP)) | |
98c6bbbe KR |
2235 | { |
2236 | fixP->fx_pcrel = 0; | |
2237 | fixP->fx_addsy = NULL; | |
2238 | } | |
f5c32424 KR |
2239 | } |
2240 | else | |
2241 | { | |
2242 | if (add_symbol_segment == absolute_section) | |
2243 | { | |
fecd2382 | 2244 | #ifdef TC_I960 |
f5c32424 KR |
2245 | /* See comment about reloc_callj() above. */ |
2246 | reloc_callj (fixP); | |
fecd2382 | 2247 | #endif /* TC_I960 */ |
f5c32424 KR |
2248 | add_number += S_GET_VALUE (add_symbolP); |
2249 | ||
2250 | /* Let the target machine make the final determination | |
2251 | as to whether or not a relocation will be needed to | |
2252 | handle this fixup. */ | |
2253 | if (!TC_FORCE_RELOCATION (fixP)) | |
e67a0640 KR |
2254 | { |
2255 | fixP->fx_addsy = NULL; | |
2256 | add_symbolP = NULL; | |
2257 | } | |
f5c32424 KR |
2258 | } |
2259 | else if (add_symbol_segment == undefined_section | |
43ca9aa6 | 2260 | #ifdef BFD_ASSEMBLER |
f5c32424 | 2261 | || bfd_is_com_section (add_symbol_segment) |
43ca9aa6 | 2262 | #endif |
f5c32424 KR |
2263 | ) |
2264 | { | |
fecd2382 | 2265 | #ifdef TC_I960 |
f5c32424 KR |
2266 | if ((int) fixP->fx_bit_fixP == 13) |
2267 | { | |
2268 | /* This is a COBR instruction. They have only a | |
2269 | * 13-bit displacement and are only to be used | |
2270 | * for local branches: flag as error, don't generate | |
2271 | * relocation. | |
2272 | */ | |
741f4d66 KR |
2273 | as_bad_where (fixP->fx_file, fixP->fx_line, |
2274 | "can't use COBR format with external label"); | |
98c6bbbe KR |
2275 | fixP->fx_addsy = NULL; |
2276 | fixP->fx_done = 1; | |
f5c32424 KR |
2277 | continue; |
2278 | } /* COBR */ | |
fecd2382 | 2279 | #endif /* TC_I960 */ |
f5c32424 | 2280 | |
fecd2382 | 2281 | #ifdef OBJ_COFF |
c593cf41 | 2282 | #ifdef TE_I386AIX |
f5c32424 KR |
2283 | if (S_IS_COMMON (add_symbolP)) |
2284 | add_number += S_GET_VALUE (add_symbolP); | |
c593cf41 | 2285 | #endif /* TE_I386AIX */ |
fecd2382 | 2286 | #endif /* OBJ_COFF */ |
f5c32424 KR |
2287 | ++seg_reloc_count; |
2288 | } | |
2289 | else | |
2290 | { | |
2291 | seg_reloc_count++; | |
a55774a1 | 2292 | #if !defined (TC_I386) || !(defined (OBJ_ELF) || defined (OBJ_COFF)) |
f5c32424 | 2293 | add_number += S_GET_VALUE (add_symbolP); |
a55774a1 | 2294 | #endif |
f5c32424 KR |
2295 | } |
2296 | } | |
2297 | } | |
6efd877d | 2298 | |
f5c32424 KR |
2299 | if (pcrel) |
2300 | { | |
2301 | add_number -= md_pcrel_from (fixP); | |
2302 | if (add_symbolP == 0) | |
2303 | { | |
1cf7548e | 2304 | #ifndef BFD_ASSEMBLER |
f5c32424 | 2305 | fixP->fx_addsy = &abs_symbol; |
1cf7548e KR |
2306 | #else |
2307 | fixP->fx_addsy = section_symbol (absolute_section); | |
2308 | #endif | |
2309 | fixP->fx_addsy->sy_used_in_reloc = 1; | |
f5c32424 | 2310 | ++seg_reloc_count; |
98c6bbbe KR |
2311 | } |
2312 | } | |
6efd877d | 2313 | |
f5c32424 KR |
2314 | if (!fixP->fx_bit_fixP && size > 0) |
2315 | { | |
2316 | valueT mask = 0; | |
df44a852 | 2317 | if (size < sizeof (mask)) |
f5c32424 | 2318 | { |
df44a852 KR |
2319 | /* set all bits to one */ |
2320 | mask--; | |
2321 | /* Technically, combining these produces an undefined result | |
2322 | if size is sizeof (valueT), though I think these two | |
2323 | half-way operations should both be defined. And the | |
2324 | compiler should be able to combine them if it's valid on | |
2325 | the host architecture. */ | |
2326 | mask <<= size * 4; | |
2327 | mask <<= size * 4; | |
2328 | if ((add_number & mask) != 0 | |
2329 | && (add_number & mask) != mask) | |
2330 | { | |
2331 | char buf[50], buf2[50]; | |
2332 | sprint_value (buf, fragP->fr_address + where); | |
2333 | if (add_number > 1000) | |
2334 | sprint_value (buf2, add_number); | |
2335 | else | |
2336 | sprintf (buf2, "%ld", (long) add_number); | |
2337 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
2338 | "Value of %s too large for field of %d bytes at %s", | |
2339 | buf2, size, buf); | |
2340 | } /* generic error checking */ | |
2341 | } | |
f5c32424 KR |
2342 | #ifdef WARN_SIGNED_OVERFLOW_WORD |
2343 | /* Warn if a .word value is too large when treated as a signed | |
2344 | number. We already know it is not too negative. This is to | |
2345 | catch over-large switches generated by gcc on the 68k. */ | |
def66e24 | 2346 | if (!flag_signed_overflow_ok |
f5c32424 KR |
2347 | && size == 2 |
2348 | && add_number > 0x7fff) | |
2349 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
2350 | "Signed .word overflow; switch may be too large; %ld at 0x%lx", | |
2351 | (long) add_number, | |
2352 | (unsigned long) (fragP->fr_address + where)); | |
6efd877d | 2353 | #endif |
f5c32424 | 2354 | } /* not a bit fix */ |
6efd877d | 2355 | |
98c6bbbe KR |
2356 | if (!fixP->fx_done) |
2357 | { | |
43ca9aa6 | 2358 | #ifdef BFD_ASSEMBLER |
98c6bbbe | 2359 | md_apply_fix (fixP, &add_number); |
43ca9aa6 | 2360 | #else |
98c6bbbe KR |
2361 | md_apply_fix (fixP, add_number); |
2362 | #endif | |
2363 | ||
2364 | #ifndef TC_HANDLES_FX_DONE | |
2365 | /* If the tc-* files haven't been converted, assume it's handling | |
2366 | it the old way, where a null fx_addsy means that the fix has | |
2367 | been applied completely, and no further work is needed. */ | |
2368 | if (fixP->fx_addsy == 0 && fixP->fx_pcrel == 0) | |
2369 | fixP->fx_done = 1; | |
43ca9aa6 | 2370 | #endif |
98c6bbbe KR |
2371 | } |
2372 | #ifdef TC_VALIDATE_FIX | |
a55774a1 KR |
2373 | skip: ; |
2374 | #endif | |
2375 | #ifdef DEBUG5 | |
2376 | fprintf (stderr, "result:\n"); | |
2377 | print_fixup (fixP); | |
98c6bbbe | 2378 | #endif |
f5c32424 | 2379 | } /* For each fixS in this segment. */ |
6efd877d | 2380 | |
f5c32424 KR |
2381 | TC_ADJUST_RELOC_COUNT (fixP, seg_reloc_count); |
2382 | return seg_reloc_count; | |
2383 | } | |
6efd877d | 2384 | |
f5c32424 | 2385 | #endif /* defined (BFD_ASSEMBLER) || !defined (BFD) */ |
6efd877d | 2386 | |
f5c32424 KR |
2387 | void |
2388 | number_to_chars_bigendian (buf, val, n) | |
2389 | char *buf; | |
2390 | valueT val; | |
2391 | int n; | |
2392 | { | |
2393 | if (n > sizeof (val)|| n <= 0) | |
2394 | abort (); | |
2395 | while (n--) | |
2396 | { | |
2397 | buf[n] = val & 0xff; | |
2398 | val >>= 8; | |
2399 | } | |
d5364748 | 2400 | } |
fecd2382 | 2401 | |
f5c32424 KR |
2402 | void |
2403 | number_to_chars_littleendian (buf, val, n) | |
2404 | char *buf; | |
2405 | valueT val; | |
2406 | int n; | |
2407 | { | |
2408 | if (n > sizeof (val) || n <= 0) | |
2409 | abort (); | |
2410 | while (n--) | |
2411 | { | |
2412 | *buf++ = val & 0xff; | |
2413 | val >>= 8; | |
2414 | } | |
2415 | } | |
80aab579 | 2416 | |
4acf8c78 KR |
2417 | /* for debugging */ |
2418 | extern int indent_level; | |
2419 | ||
2420 | void | |
2421 | print_fixup (fixp) | |
2422 | fixS *fixp; | |
2423 | { | |
2424 | indent_level = 1; | |
a55774a1 | 2425 | fprintf (stderr, "fix %lx %s:%d", (long) fixp, fixp->fx_file, fixp->fx_line); |
4acf8c78 KR |
2426 | if (fixp->fx_pcrel) |
2427 | fprintf (stderr, " pcrel"); | |
2428 | if (fixp->fx_pcrel_adjust) | |
2429 | fprintf (stderr, " pcrel_adjust=%d", fixp->fx_pcrel_adjust); | |
2430 | if (fixp->fx_im_disp) | |
2431 | { | |
2432 | #ifdef TC_NS32K | |
2433 | fprintf (stderr, " im_disp=%d", fixp->fx_im_disp); | |
2434 | #else | |
2435 | fprintf (stderr, " im_disp"); | |
2436 | #endif | |
2437 | } | |
2438 | if (fixp->fx_tcbit) | |
2439 | fprintf (stderr, " tcbit"); | |
2440 | if (fixp->fx_done) | |
2441 | fprintf (stderr, " done"); | |
a55774a1 KR |
2442 | fprintf (stderr, "\n size=%d frag=%lx where=%ld offset=%lx addnumber=%lx", |
2443 | fixp->fx_size, (long) fixp->fx_frag, (long) fixp->fx_where, | |
2444 | (long) fixp->fx_offset, (long) fixp->fx_addnumber); | |
9dc6c00f KR |
2445 | #ifdef BFD_ASSEMBLER |
2446 | fprintf (stderr, "\n %s (%d)", bfd_get_reloc_code_name (fixp->fx_r_type), | |
2447 | fixp->fx_r_type); | |
2448 | #else | |
a55774a1 | 2449 | #ifdef NEED_FX_R_TYPE |
9dc6c00f | 2450 | fprintf (stderr, " r_type=%d", fixp->fx_r_type); |
a55774a1 | 2451 | #endif |
9dc6c00f KR |
2452 | #endif |
2453 | if (fixp->fx_addsy) | |
2454 | { | |
a55774a1 | 2455 | fprintf (stderr, "\n +<"); |
9dc6c00f KR |
2456 | print_symbol_value_1 (stderr, fixp->fx_addsy); |
2457 | fprintf (stderr, ">"); | |
2458 | } | |
a55774a1 KR |
2459 | if (fixp->fx_subsy) |
2460 | { | |
2461 | fprintf (stderr, "\n -<"); | |
2462 | print_symbol_value_1 (stderr, fixp->fx_subsy); | |
2463 | fprintf (stderr, ">"); | |
2464 | } | |
9dc6c00f | 2465 | fprintf (stderr, "\n"); |
4acf8c78 KR |
2466 | } |
2467 | ||
fecd2382 | 2468 | /* end of write.c */ |