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252b5132 | 1 | /* write.c - emit .o file |
f7e42eb4 | 2 | Copyright 1986, 1987, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, |
5a38dc70 | 3 | 1998, 1999, 2000, 2001, 2002 |
252b5132 RH |
4 | Free Software Foundation, Inc. |
5 | ||
6 | This file is part of GAS, the GNU Assembler. | |
7 | ||
8 | GAS is free software; you can redistribute it and/or modify | |
9 | it under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 2, or (at your option) | |
11 | any later version. | |
12 | ||
13 | GAS is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with GAS; see the file COPYING. If not, write to the Free | |
20 | Software Foundation, 59 Temple Place - Suite 330, Boston, MA | |
21 | 02111-1307, USA. */ | |
22 | ||
efaf0ba4 | 23 | /* This thing should be set up to do byteordering correctly. But... */ |
252b5132 RH |
24 | |
25 | #include "as.h" | |
26 | #include "subsegs.h" | |
27 | #include "obstack.h" | |
28 | #include "output-file.h" | |
220e750f | 29 | #include "dwarf2dbg.h" |
252b5132 | 30 | |
252b5132 | 31 | #ifndef TC_ADJUST_RELOC_COUNT |
df44284e | 32 | #define TC_ADJUST_RELOC_COUNT(FIX, COUNT) |
252b5132 RH |
33 | #endif |
34 | ||
35 | #ifndef TC_FORCE_RELOCATION | |
a161fe53 AM |
36 | #define TC_FORCE_RELOCATION(FIX) \ |
37 | (S_FORCE_RELOC ((FIX)->fx_addsy)) | |
252b5132 RH |
38 | #endif |
39 | ||
a161fe53 AM |
40 | #ifndef TC_FORCE_RELOCATION_ABS |
41 | #define TC_FORCE_RELOCATION_ABS(FIX) \ | |
42 | (TC_FORCE_RELOCATION (FIX)) | |
43 | #endif | |
44 | ||
45 | #ifndef TC_FORCE_RELOCATION_LOCAL | |
46 | #define TC_FORCE_RELOCATION_LOCAL(FIX) \ | |
47 | (!(FIX)->fx_pcrel \ | |
48 | || (FIX)->fx_plt \ | |
49 | || TC_FORCE_RELOCATION (FIX)) | |
50 | #endif | |
51 | ||
52 | #ifndef TC_FORCE_RELOCATION_SUB_SAME | |
53 | #define TC_FORCE_RELOCATION_SUB_SAME(FIX, SEG) \ | |
54 | (! SEG_NORMAL (SEG)) | |
55 | #endif | |
56 | ||
57 | #ifndef TC_FORCE_RELOCATION_SUB_ABS | |
58 | #define TC_FORCE_RELOCATION_SUB_ABS(FIX) \ | |
59 | (S_FORCE_RELOC ((FIX)->fx_subsy)) | |
60 | #endif | |
61 | ||
62 | #ifndef TC_FORCE_RELOCATION_SUB_LOCAL | |
63 | #ifdef DIFF_EXPR_OK | |
64 | #define TC_FORCE_RELOCATION_SUB_LOCAL(FIX) \ | |
65 | (S_FORCE_RELOC ((FIX)->fx_subsy)) | |
66 | #else | |
67 | #define TC_FORCE_RELOCATION_SUB_LOCAL(FIX) 1 | |
68 | #endif | |
69 | #endif | |
70 | ||
71 | #ifndef TC_VALIDATE_FIX_SUB | |
72 | #ifdef UNDEFINED_DIFFERENCE_OK | |
73 | /* The PA needs this for PIC code generation. */ | |
74 | #define TC_VALIDATE_FIX_SUB(FIX) 1 | |
75 | #else | |
76 | #ifdef BFD_ASSEMBLER | |
77 | #define TC_VALIDATE_FIX_SUB(FIX) \ | |
78 | ((FIX)->fx_r_type == BFD_RELOC_GPREL32 \ | |
79 | || (FIX)->fx_r_type == BFD_RELOC_GPREL16) | |
80 | #else | |
81 | #define TC_VALIDATE_FIX_SUB(FIX) 0 | |
82 | #endif | |
83 | #endif | |
252b5132 RH |
84 | #endif |
85 | ||
58a77e41 EC |
86 | #ifndef TC_LINKRELAX_FIXUP |
87 | #define TC_LINKRELAX_FIXUP(SEG) 1 | |
88 | #endif | |
89 | ||
a161fe53 AM |
90 | #ifndef MD_APPLY_SYM_VALUE |
91 | #define MD_APPLY_SYM_VALUE(FIX) 1 | |
8f36cd18 | 92 | #endif |
ef99799a | 93 | |
87548816 NC |
94 | #ifndef TC_FINALIZE_SYMS_BEFORE_SIZE_SEG |
95 | #define TC_FINALIZE_SYMS_BEFORE_SIZE_SEG 1 | |
96 | #endif | |
97 | ||
252b5132 | 98 | #ifndef MD_PCREL_FROM_SECTION |
df44284e | 99 | #define MD_PCREL_FROM_SECTION(FIX, SEC) md_pcrel_from (FIX) |
252b5132 RH |
100 | #endif |
101 | ||
102 | #ifndef WORKING_DOT_WORD | |
5a38dc70 AM |
103 | extern const int md_short_jump_size; |
104 | extern const int md_long_jump_size; | |
252b5132 RH |
105 | #endif |
106 | ||
6386f3a7 AM |
107 | /* Used to control final evaluation of expressions. */ |
108 | int finalize_syms = 0; | |
e46d99eb | 109 | |
252b5132 | 110 | int symbol_table_frozen; |
a161fe53 AM |
111 | |
112 | symbolS *abs_section_sym; | |
113 | ||
26346241 AM |
114 | /* Remember the value of dot when parsing expressions. */ |
115 | addressT dot_value; | |
116 | ||
252b5132 RH |
117 | void print_fixup PARAMS ((fixS *)); |
118 | ||
119 | #ifdef BFD_ASSEMBLER | |
120 | static void renumber_sections PARAMS ((bfd *, asection *, PTR)); | |
121 | ||
122 | /* We generally attach relocs to frag chains. However, after we have | |
123 | chained these all together into a segment, any relocs we add after | |
124 | that must be attached to a segment. This will include relocs added | |
125 | in md_estimate_size_for_relax, for example. */ | |
126 | static int frags_chained = 0; | |
127 | #endif | |
128 | ||
129 | #ifndef BFD_ASSEMBLER | |
130 | ||
131 | #ifndef MANY_SEGMENTS | |
132 | struct frag *text_frag_root; | |
133 | struct frag *data_frag_root; | |
134 | struct frag *bss_frag_root; | |
135 | ||
efaf0ba4 NC |
136 | struct frag *text_last_frag; /* Last frag in segment. */ |
137 | struct frag *data_last_frag; /* Last frag in segment. */ | |
138 | static struct frag *bss_last_frag; /* Last frag in segment. */ | |
252b5132 RH |
139 | #endif |
140 | ||
141 | #ifndef BFD | |
142 | static object_headers headers; | |
143 | #endif | |
144 | ||
145 | long string_byte_count; | |
efaf0ba4 | 146 | char *next_object_file_charP; /* Tracks object file bytes. */ |
252b5132 RH |
147 | |
148 | #ifndef OBJ_VMS | |
149 | int magic_number_for_object_file = DEFAULT_MAGIC_NUMBER_FOR_OBJECT_FILE; | |
150 | #endif | |
151 | ||
efaf0ba4 | 152 | #endif /* BFD_ASSEMBLER */ |
252b5132 RH |
153 | |
154 | static int n_fixups; | |
155 | ||
156 | #ifdef BFD_ASSEMBLER | |
df44284e | 157 | #define RELOC_ENUM enum bfd_reloc_code_real |
252b5132 | 158 | #else |
df44284e AM |
159 | #define RELOC_ENUM int |
160 | #endif | |
161 | ||
252b5132 RH |
162 | static fixS *fix_new_internal PARAMS ((fragS *, int where, int size, |
163 | symbolS *add, symbolS *sub, | |
164 | offsetT offset, int pcrel, | |
df44284e | 165 | RELOC_ENUM r_type)); |
252b5132 | 166 | #if defined (BFD_ASSEMBLER) || (!defined (BFD) && !defined (OBJ_VMS)) |
df44284e | 167 | static long fixup_segment PARAMS ((fixS *, segT)); |
252b5132 RH |
168 | #endif |
169 | static relax_addressT relax_align PARAMS ((relax_addressT addr, int align)); | |
170 | #if defined (BFD_ASSEMBLER) || ! defined (BFD) | |
171 | static fragS *chain_frchains_together_1 PARAMS ((segT, struct frchain *)); | |
172 | #endif | |
173 | #ifdef BFD_ASSEMBLER | |
174 | static void chain_frchains_together PARAMS ((bfd *, segT, PTR)); | |
175 | static void cvt_frag_to_fill PARAMS ((segT, fragS *)); | |
252b5132 | 176 | static void adjust_reloc_syms PARAMS ((bfd *, asection *, PTR)); |
a161fe53 | 177 | static void fix_segment PARAMS ((bfd *, asection *, PTR)); |
252b5132 RH |
178 | static void write_relocs PARAMS ((bfd *, asection *, PTR)); |
179 | static void write_contents PARAMS ((bfd *, asection *, PTR)); | |
180 | static void set_symtab PARAMS ((void)); | |
181 | #endif | |
182 | #if defined (BFD_ASSEMBLER) || (! defined (BFD) && ! defined (OBJ_AOUT)) | |
183 | static void merge_data_into_text PARAMS ((void)); | |
184 | #endif | |
185 | #if ! defined (BFD_ASSEMBLER) && ! defined (BFD) | |
186 | static void cvt_frag_to_fill PARAMS ((object_headers *, segT, fragS *)); | |
187 | static void remove_subsegs PARAMS ((frchainS *, int, fragS **, fragS **)); | |
188 | static void relax_and_size_all_segments PARAMS ((void)); | |
189 | #endif | |
6aa4f516 | 190 | #if defined (BFD_ASSEMBLER) && defined (OBJ_COFF) && defined (TE_GO32) |
dbddefbf NC |
191 | static void set_segment_vma PARAMS ((bfd *, asection *, PTR)); |
192 | #endif | |
252b5132 | 193 | |
efaf0ba4 NC |
194 | /* Create a fixS in obstack 'notes'. */ |
195 | ||
252b5132 RH |
196 | static fixS * |
197 | fix_new_internal (frag, where, size, add_symbol, sub_symbol, offset, pcrel, | |
198 | r_type) | |
efaf0ba4 NC |
199 | fragS *frag; /* Which frag? */ |
200 | int where; /* Where in that frag? */ | |
201 | int size; /* 1, 2, or 4 usually. */ | |
202 | symbolS *add_symbol; /* X_add_symbol. */ | |
203 | symbolS *sub_symbol; /* X_op_symbol. */ | |
204 | offsetT offset; /* X_add_number. */ | |
205 | int pcrel; /* TRUE if PC-relative relocation. */ | |
df44284e | 206 | RELOC_ENUM r_type ATTRIBUTE_UNUSED; /* Relocation type. */ |
252b5132 RH |
207 | { |
208 | fixS *fixP; | |
209 | ||
210 | n_fixups++; | |
211 | ||
212 | fixP = (fixS *) obstack_alloc (¬es, sizeof (fixS)); | |
213 | ||
214 | fixP->fx_frag = frag; | |
215 | fixP->fx_where = where; | |
216 | fixP->fx_size = size; | |
217 | /* We've made fx_size a narrow field; check that it's wide enough. */ | |
218 | if (fixP->fx_size != size) | |
219 | { | |
220 | as_bad (_("field fx_size too small to hold %d"), size); | |
221 | abort (); | |
222 | } | |
223 | fixP->fx_addsy = add_symbol; | |
224 | fixP->fx_subsy = sub_symbol; | |
225 | fixP->fx_offset = offset; | |
26346241 | 226 | fixP->fx_dot_value = dot_value; |
252b5132 RH |
227 | fixP->fx_pcrel = pcrel; |
228 | fixP->fx_plt = 0; | |
229 | #if defined(NEED_FX_R_TYPE) || defined (BFD_ASSEMBLER) | |
230 | fixP->fx_r_type = r_type; | |
231 | #endif | |
232 | fixP->fx_im_disp = 0; | |
233 | fixP->fx_pcrel_adjust = 0; | |
234 | fixP->fx_bit_fixP = 0; | |
235 | fixP->fx_addnumber = 0; | |
236 | fixP->fx_tcbit = 0; | |
237 | fixP->fx_done = 0; | |
238 | fixP->fx_no_overflow = 0; | |
239 | fixP->fx_signed = 0; | |
240 | ||
241 | #ifdef USING_CGEN | |
242 | fixP->fx_cgen.insn = NULL; | |
243 | fixP->fx_cgen.opinfo = 0; | |
244 | #endif | |
245 | ||
246 | #ifdef TC_FIX_TYPE | |
efaf0ba4 | 247 | TC_INIT_FIX_DATA (fixP); |
252b5132 RH |
248 | #endif |
249 | ||
250 | as_where (&fixP->fx_file, &fixP->fx_line); | |
251 | ||
252 | /* Usually, we want relocs sorted numerically, but while | |
253 | comparing to older versions of gas that have relocs | |
254 | reverse sorted, it is convenient to have this compile | |
efaf0ba4 | 255 | time option. xoxorich. */ |
252b5132 RH |
256 | { |
257 | ||
258 | #ifdef BFD_ASSEMBLER | |
259 | fixS **seg_fix_rootP = (frags_chained | |
260 | ? &seg_info (now_seg)->fix_root | |
261 | : &frchain_now->fix_root); | |
262 | fixS **seg_fix_tailP = (frags_chained | |
263 | ? &seg_info (now_seg)->fix_tail | |
264 | : &frchain_now->fix_tail); | |
265 | #endif | |
266 | ||
267 | #ifdef REVERSE_SORT_RELOCS | |
268 | ||
269 | fixP->fx_next = *seg_fix_rootP; | |
270 | *seg_fix_rootP = fixP; | |
271 | ||
efaf0ba4 | 272 | #else /* REVERSE_SORT_RELOCS */ |
252b5132 RH |
273 | |
274 | fixP->fx_next = NULL; | |
275 | ||
276 | if (*seg_fix_tailP) | |
277 | (*seg_fix_tailP)->fx_next = fixP; | |
278 | else | |
279 | *seg_fix_rootP = fixP; | |
280 | *seg_fix_tailP = fixP; | |
281 | ||
efaf0ba4 | 282 | #endif /* REVERSE_SORT_RELOCS */ |
252b5132 RH |
283 | } |
284 | ||
285 | return fixP; | |
286 | } | |
287 | ||
288 | /* Create a fixup relative to a symbol (plus a constant). */ | |
289 | ||
290 | fixS * | |
291 | fix_new (frag, where, size, add_symbol, offset, pcrel, r_type) | |
efaf0ba4 NC |
292 | fragS *frag; /* Which frag? */ |
293 | int where; /* Where in that frag? */ | |
294 | int size; /* 1, 2, or 4 usually. */ | |
295 | symbolS *add_symbol; /* X_add_symbol. */ | |
296 | offsetT offset; /* X_add_number. */ | |
297 | int pcrel; /* TRUE if PC-relative relocation. */ | |
df44284e | 298 | RELOC_ENUM r_type; /* Relocation type. */ |
252b5132 RH |
299 | { |
300 | return fix_new_internal (frag, where, size, add_symbol, | |
301 | (symbolS *) NULL, offset, pcrel, r_type); | |
302 | } | |
303 | ||
304 | /* Create a fixup for an expression. Currently we only support fixups | |
305 | for difference expressions. That is itself more than most object | |
306 | file formats support anyhow. */ | |
307 | ||
308 | fixS * | |
309 | fix_new_exp (frag, where, size, exp, pcrel, r_type) | |
efaf0ba4 NC |
310 | fragS *frag; /* Which frag? */ |
311 | int where; /* Where in that frag? */ | |
312 | int size; /* 1, 2, or 4 usually. */ | |
252b5132 | 313 | expressionS *exp; /* Expression. */ |
efaf0ba4 | 314 | int pcrel; /* TRUE if PC-relative relocation. */ |
df44284e | 315 | RELOC_ENUM r_type; /* Relocation type. */ |
252b5132 RH |
316 | { |
317 | symbolS *add = NULL; | |
318 | symbolS *sub = NULL; | |
319 | offsetT off = 0; | |
320 | ||
321 | switch (exp->X_op) | |
322 | { | |
323 | case O_absent: | |
324 | break; | |
325 | ||
37006e43 NC |
326 | case O_register: |
327 | as_bad (_("register value used as expression")); | |
328 | break; | |
329 | ||
252b5132 RH |
330 | case O_add: |
331 | /* This comes up when _GLOBAL_OFFSET_TABLE_+(.-L0) is read, if | |
332 | the difference expression cannot immediately be reduced. */ | |
333 | { | |
334 | symbolS *stmp = make_expr_symbol (exp); | |
58a77e41 | 335 | |
252b5132 RH |
336 | exp->X_op = O_symbol; |
337 | exp->X_op_symbol = 0; | |
338 | exp->X_add_symbol = stmp; | |
339 | exp->X_add_number = 0; | |
58a77e41 | 340 | |
252b5132 RH |
341 | return fix_new_exp (frag, where, size, exp, pcrel, r_type); |
342 | } | |
343 | ||
344 | case O_symbol_rva: | |
345 | add = exp->X_add_symbol; | |
346 | off = exp->X_add_number; | |
347 | ||
348 | #if defined(BFD_ASSEMBLER) | |
349 | r_type = BFD_RELOC_RVA; | |
350 | #else | |
351 | #if defined(TC_RVA_RELOC) | |
352 | r_type = TC_RVA_RELOC; | |
353 | #else | |
efaf0ba4 | 354 | as_fatal (_("rva not supported")); |
252b5132 RH |
355 | #endif |
356 | #endif | |
357 | break; | |
358 | ||
359 | case O_uminus: | |
360 | sub = exp->X_add_symbol; | |
361 | off = exp->X_add_number; | |
362 | break; | |
363 | ||
364 | case O_subtract: | |
365 | sub = exp->X_op_symbol; | |
366 | /* Fall through. */ | |
367 | case O_symbol: | |
368 | add = exp->X_add_symbol; | |
efaf0ba4 | 369 | /* Fall through. */ |
252b5132 RH |
370 | case O_constant: |
371 | off = exp->X_add_number; | |
372 | break; | |
373 | ||
374 | default: | |
375 | add = make_expr_symbol (exp); | |
376 | break; | |
377 | } | |
378 | ||
efaf0ba4 | 379 | return fix_new_internal (frag, where, size, add, sub, off, pcrel, r_type); |
252b5132 RH |
380 | } |
381 | ||
382 | /* Append a string onto another string, bumping the pointer along. */ | |
383 | void | |
384 | append (charPP, fromP, length) | |
385 | char **charPP; | |
386 | char *fromP; | |
387 | unsigned long length; | |
388 | { | |
efaf0ba4 | 389 | /* Don't trust memcpy() of 0 chars. */ |
252b5132 RH |
390 | if (length == 0) |
391 | return; | |
392 | ||
393 | memcpy (*charPP, fromP, length); | |
394 | *charPP += length; | |
395 | } | |
396 | ||
397 | #ifndef BFD_ASSEMBLER | |
398 | int section_alignment[SEG_MAXIMUM_ORDINAL]; | |
399 | #endif | |
400 | ||
efaf0ba4 NC |
401 | /* This routine records the largest alignment seen for each segment. |
402 | If the beginning of the segment is aligned on the worst-case | |
403 | boundary, all of the other alignments within it will work. At | |
404 | least one object format really uses this info. */ | |
405 | ||
252b5132 RH |
406 | void |
407 | record_alignment (seg, align) | |
efaf0ba4 | 408 | /* Segment to which alignment pertains. */ |
252b5132 RH |
409 | segT seg; |
410 | /* Alignment, as a power of 2 (e.g., 1 => 2-byte boundary, 2 => 4-byte | |
411 | boundary, etc.) */ | |
412 | int align; | |
413 | { | |
414 | if (seg == absolute_section) | |
415 | return; | |
416 | #ifdef BFD_ASSEMBLER | |
417 | if ((unsigned int) align > bfd_get_section_alignment (stdoutput, seg)) | |
418 | bfd_set_section_alignment (stdoutput, seg, align); | |
419 | #else | |
420 | if (align > section_alignment[(int) seg]) | |
421 | section_alignment[(int) seg] = align; | |
422 | #endif | |
423 | } | |
424 | ||
0a9ef439 RH |
425 | int |
426 | get_recorded_alignment (seg) | |
427 | segT seg; | |
428 | { | |
429 | if (seg == absolute_section) | |
430 | return 0; | |
431 | #ifdef BFD_ASSEMBLER | |
432 | return bfd_get_section_alignment (stdoutput, seg); | |
433 | #else | |
434 | return section_alignment[(int) seg]; | |
435 | #endif | |
436 | } | |
437 | ||
252b5132 RH |
438 | #ifdef BFD_ASSEMBLER |
439 | ||
440 | /* Reset the section indices after removing the gas created sections. */ | |
441 | ||
442 | static void | |
443 | renumber_sections (abfd, sec, countparg) | |
ab9da554 | 444 | bfd *abfd ATTRIBUTE_UNUSED; |
252b5132 RH |
445 | asection *sec; |
446 | PTR countparg; | |
447 | { | |
448 | int *countp = (int *) countparg; | |
449 | ||
450 | sec->index = *countp; | |
451 | ++*countp; | |
452 | } | |
453 | ||
efaf0ba4 | 454 | #endif /* defined (BFD_ASSEMBLER) */ |
252b5132 RH |
455 | |
456 | #if defined (BFD_ASSEMBLER) || ! defined (BFD) | |
457 | ||
458 | static fragS * | |
459 | chain_frchains_together_1 (section, frchp) | |
460 | segT section; | |
461 | struct frchain *frchp; | |
462 | { | |
463 | fragS dummy, *prev_frag = &dummy; | |
464 | #ifdef BFD_ASSEMBLER | |
465 | fixS fix_dummy, *prev_fix = &fix_dummy; | |
466 | #endif | |
467 | ||
468 | for (; frchp && frchp->frch_seg == section; frchp = frchp->frch_next) | |
469 | { | |
470 | prev_frag->fr_next = frchp->frch_root; | |
471 | prev_frag = frchp->frch_last; | |
472 | assert (prev_frag->fr_type != 0); | |
473 | #ifdef BFD_ASSEMBLER | |
474 | if (frchp->fix_root != (fixS *) NULL) | |
475 | { | |
476 | if (seg_info (section)->fix_root == (fixS *) NULL) | |
477 | seg_info (section)->fix_root = frchp->fix_root; | |
478 | prev_fix->fx_next = frchp->fix_root; | |
479 | seg_info (section)->fix_tail = frchp->fix_tail; | |
480 | prev_fix = frchp->fix_tail; | |
481 | } | |
482 | #endif | |
483 | } | |
484 | assert (prev_frag->fr_type != 0); | |
485 | prev_frag->fr_next = 0; | |
486 | return prev_frag; | |
487 | } | |
488 | ||
489 | #endif | |
490 | ||
491 | #ifdef BFD_ASSEMBLER | |
492 | ||
493 | static void | |
494 | chain_frchains_together (abfd, section, xxx) | |
ab9da554 | 495 | bfd *abfd ATTRIBUTE_UNUSED; |
252b5132 | 496 | segT section; |
ab9da554 | 497 | PTR xxx ATTRIBUTE_UNUSED; |
252b5132 RH |
498 | { |
499 | segment_info_type *info; | |
500 | ||
501 | /* BFD may have introduced its own sections without using | |
502 | subseg_new, so it is possible that seg_info is NULL. */ | |
503 | info = seg_info (section); | |
504 | if (info != (segment_info_type *) NULL) | |
efaf0ba4 NC |
505 | info->frchainP->frch_last |
506 | = chain_frchains_together_1 (section, info->frchainP); | |
252b5132 RH |
507 | |
508 | /* Now that we've chained the frags together, we must add new fixups | |
509 | to the segment, not to the frag chain. */ | |
510 | frags_chained = 1; | |
511 | } | |
512 | ||
513 | #endif | |
514 | ||
515 | #if !defined (BFD) && !defined (BFD_ASSEMBLER) | |
516 | ||
517 | static void | |
518 | remove_subsegs (head, seg, root, last) | |
519 | frchainS *head; | |
520 | int seg; | |
521 | fragS **root; | |
522 | fragS **last; | |
523 | { | |
524 | *root = head->frch_root; | |
525 | *last = chain_frchains_together_1 (seg, head); | |
526 | } | |
527 | ||
efaf0ba4 | 528 | #endif /* BFD */ |
252b5132 RH |
529 | |
530 | #if defined (BFD_ASSEMBLER) || !defined (BFD) | |
531 | ||
532 | #ifdef BFD_ASSEMBLER | |
533 | static void | |
534 | cvt_frag_to_fill (sec, fragP) | |
efaf0ba4 | 535 | segT sec ATTRIBUTE_UNUSED; |
252b5132 RH |
536 | fragS *fragP; |
537 | #else | |
538 | static void | |
539 | cvt_frag_to_fill (headersP, sec, fragP) | |
540 | object_headers *headersP; | |
541 | segT sec; | |
542 | fragS *fragP; | |
543 | #endif | |
544 | { | |
545 | switch (fragP->fr_type) | |
546 | { | |
547 | case rs_align: | |
548 | case rs_align_code: | |
0a9ef439 | 549 | case rs_align_test: |
252b5132 RH |
550 | case rs_org: |
551 | case rs_space: | |
552 | #ifdef HANDLE_ALIGN | |
553 | HANDLE_ALIGN (fragP); | |
554 | #endif | |
555 | know (fragP->fr_next != NULL); | |
556 | fragP->fr_offset = (fragP->fr_next->fr_address | |
557 | - fragP->fr_address | |
558 | - fragP->fr_fix) / fragP->fr_var; | |
559 | if (fragP->fr_offset < 0) | |
560 | { | |
14ad458a ILT |
561 | as_bad_where (fragP->fr_file, fragP->fr_line, |
562 | _("attempt to .org/.space backwards? (%ld)"), | |
563 | (long) fragP->fr_offset); | |
3f3cdb03 | 564 | fragP->fr_offset = 0; |
252b5132 RH |
565 | } |
566 | fragP->fr_type = rs_fill; | |
567 | break; | |
568 | ||
569 | case rs_fill: | |
570 | break; | |
571 | ||
572 | case rs_leb128: | |
573 | { | |
574 | valueT value = S_GET_VALUE (fragP->fr_symbol); | |
575 | int size; | |
576 | ||
577 | size = output_leb128 (fragP->fr_literal + fragP->fr_fix, value, | |
578 | fragP->fr_subtype); | |
579 | ||
580 | fragP->fr_fix += size; | |
581 | fragP->fr_type = rs_fill; | |
582 | fragP->fr_var = 0; | |
583 | fragP->fr_offset = 0; | |
584 | fragP->fr_symbol = NULL; | |
585 | } | |
586 | break; | |
587 | ||
588 | case rs_cfa: | |
589 | eh_frame_convert_frag (fragP); | |
590 | break; | |
591 | ||
220e750f RH |
592 | case rs_dwarf2dbg: |
593 | dwarf2dbg_convert_frag (fragP); | |
594 | break; | |
595 | ||
252b5132 RH |
596 | case rs_machine_dependent: |
597 | #ifdef BFD_ASSEMBLER | |
598 | md_convert_frag (stdoutput, sec, fragP); | |
599 | #else | |
600 | md_convert_frag (headersP, sec, fragP); | |
601 | #endif | |
602 | ||
603 | assert (fragP->fr_next == NULL | |
604 | || ((offsetT) (fragP->fr_next->fr_address - fragP->fr_address) | |
605 | == fragP->fr_fix)); | |
606 | ||
efaf0ba4 NC |
607 | /* After md_convert_frag, we make the frag into a ".space 0". |
608 | md_convert_frag() should set up any fixSs and constants | |
609 | required. */ | |
252b5132 RH |
610 | frag_wane (fragP); |
611 | break; | |
612 | ||
613 | #ifndef WORKING_DOT_WORD | |
614 | case rs_broken_word: | |
615 | { | |
616 | struct broken_word *lie; | |
617 | ||
618 | if (fragP->fr_subtype) | |
619 | { | |
620 | fragP->fr_fix += md_short_jump_size; | |
621 | for (lie = (struct broken_word *) (fragP->fr_symbol); | |
622 | lie && lie->dispfrag == fragP; | |
623 | lie = lie->next_broken_word) | |
624 | if (lie->added == 1) | |
625 | fragP->fr_fix += md_long_jump_size; | |
626 | } | |
627 | frag_wane (fragP); | |
628 | } | |
629 | break; | |
630 | #endif | |
631 | ||
632 | default: | |
633 | BAD_CASE (fragP->fr_type); | |
634 | break; | |
635 | } | |
636 | } | |
637 | ||
efaf0ba4 | 638 | #endif /* defined (BFD_ASSEMBLER) || !defined (BFD) */ |
252b5132 RH |
639 | |
640 | #ifdef BFD_ASSEMBLER | |
e46d99eb | 641 | static void relax_seg PARAMS ((bfd *, asection *, PTR)); |
252b5132 | 642 | static void |
e46d99eb AM |
643 | relax_seg (abfd, sec, xxx) |
644 | bfd *abfd ATTRIBUTE_UNUSED; | |
645 | asection *sec; | |
646 | PTR xxx; | |
647 | { | |
648 | segment_info_type *seginfo = seg_info (sec); | |
649 | ||
650 | if (seginfo && seginfo->frchainP | |
651 | && relax_segment (seginfo->frchainP->frch_root, sec)) | |
652 | { | |
653 | int *result = (int *) xxx; | |
654 | *result = 1; | |
655 | } | |
656 | } | |
657 | ||
658 | static void size_seg PARAMS ((bfd *, asection *, PTR)); | |
659 | static void | |
660 | size_seg (abfd, sec, xxx) | |
252b5132 RH |
661 | bfd *abfd; |
662 | asection *sec; | |
ab9da554 | 663 | PTR xxx ATTRIBUTE_UNUSED; |
252b5132 RH |
664 | { |
665 | flagword flags; | |
666 | fragS *fragp; | |
667 | segment_info_type *seginfo; | |
668 | int x; | |
669 | valueT size, newsize; | |
670 | ||
671 | subseg_change (sec, 0); | |
672 | ||
252b5132 RH |
673 | seginfo = seg_info (sec); |
674 | if (seginfo && seginfo->frchainP) | |
675 | { | |
252b5132 RH |
676 | for (fragp = seginfo->frchainP->frch_root; fragp; fragp = fragp->fr_next) |
677 | cvt_frag_to_fill (sec, fragp); | |
678 | for (fragp = seginfo->frchainP->frch_root; | |
679 | fragp->fr_next; | |
680 | fragp = fragp->fr_next) | |
efaf0ba4 NC |
681 | /* Walk to last elt. */ |
682 | ; | |
252b5132 RH |
683 | size = fragp->fr_address + fragp->fr_fix; |
684 | } | |
685 | else | |
686 | size = 0; | |
687 | ||
e46d99eb AM |
688 | flags = bfd_get_section_flags (abfd, sec); |
689 | ||
252b5132 RH |
690 | if (size > 0 && ! seginfo->bss) |
691 | flags |= SEC_HAS_CONTENTS; | |
692 | ||
693 | /* @@ This is just an approximation. */ | |
694 | if (seginfo && seginfo->fix_root) | |
695 | flags |= SEC_RELOC; | |
696 | else | |
697 | flags &= ~SEC_RELOC; | |
698 | x = bfd_set_section_flags (abfd, sec, flags); | |
699 | assert (x == true); | |
700 | ||
701 | newsize = md_section_align (sec, size); | |
702 | x = bfd_set_section_size (abfd, sec, newsize); | |
703 | assert (x == true); | |
704 | ||
705 | /* If the size had to be rounded up, add some padding in the last | |
706 | non-empty frag. */ | |
707 | assert (newsize >= size); | |
708 | if (size != newsize) | |
709 | { | |
710 | fragS *last = seginfo->frchainP->frch_last; | |
711 | fragp = seginfo->frchainP->frch_root; | |
712 | while (fragp->fr_next != last) | |
713 | fragp = fragp->fr_next; | |
714 | last->fr_address = size; | |
18e1d487 AM |
715 | if ((newsize - size) % fragp->fr_var == 0) |
716 | fragp->fr_offset += (newsize - size) / fragp->fr_var; | |
717 | else | |
718 | /* If we hit this abort, it's likely due to subsegs_finish not | |
719 | providing sufficient alignment on the last frag, and the | |
720 | machine dependent code using alignment frags with fr_var | |
721 | greater than 1. */ | |
722 | abort (); | |
252b5132 RH |
723 | } |
724 | ||
725 | #ifdef tc_frob_section | |
726 | tc_frob_section (sec); | |
727 | #endif | |
728 | #ifdef obj_frob_section | |
729 | obj_frob_section (sec); | |
730 | #endif | |
731 | } | |
732 | ||
733 | #ifdef DEBUG2 | |
734 | static void | |
735 | dump_section_relocs (abfd, sec, stream_) | |
e723ef7c | 736 | bfd *abfd ATTRIBUTE_UNUSED; |
252b5132 RH |
737 | asection *sec; |
738 | char *stream_; | |
739 | { | |
740 | FILE *stream = (FILE *) stream_; | |
741 | segment_info_type *seginfo = seg_info (sec); | |
742 | fixS *fixp = seginfo->fix_root; | |
743 | ||
744 | if (!fixp) | |
745 | return; | |
746 | ||
747 | fprintf (stream, "sec %s relocs:\n", sec->name); | |
748 | while (fixp) | |
749 | { | |
750 | symbolS *s = fixp->fx_addsy; | |
e723ef7c ILT |
751 | |
752 | fprintf (stream, " %08lx: type %d ", (unsigned long) fixp, | |
753 | (int) fixp->fx_r_type); | |
754 | if (s == NULL) | |
755 | fprintf (stream, "no sym\n"); | |
756 | else | |
252b5132 | 757 | { |
e723ef7c ILT |
758 | print_symbol_value_1 (stream, s); |
759 | fprintf (stream, "\n"); | |
252b5132 | 760 | } |
252b5132 RH |
761 | fixp = fixp->fx_next; |
762 | } | |
763 | } | |
764 | #else | |
765 | #define dump_section_relocs(ABFD,SEC,STREAM) ((void) 0) | |
766 | #endif | |
767 | ||
768 | #ifndef EMIT_SECTION_SYMBOLS | |
769 | #define EMIT_SECTION_SYMBOLS 1 | |
770 | #endif | |
771 | ||
df44284e AM |
772 | /* This pass over fixups decides whether symbols can be replaced with |
773 | section symbols. */ | |
774 | ||
252b5132 RH |
775 | static void |
776 | adjust_reloc_syms (abfd, sec, xxx) | |
ab9da554 | 777 | bfd *abfd ATTRIBUTE_UNUSED; |
252b5132 | 778 | asection *sec; |
ab9da554 | 779 | PTR xxx ATTRIBUTE_UNUSED; |
252b5132 RH |
780 | { |
781 | segment_info_type *seginfo = seg_info (sec); | |
782 | fixS *fixp; | |
783 | ||
784 | if (seginfo == NULL) | |
785 | return; | |
786 | ||
787 | dump_section_relocs (abfd, sec, stderr); | |
788 | ||
789 | for (fixp = seginfo->fix_root; fixp; fixp = fixp->fx_next) | |
790 | if (fixp->fx_done) | |
efaf0ba4 NC |
791 | /* Ignore it. */ |
792 | ; | |
252b5132 RH |
793 | else if (fixp->fx_addsy) |
794 | { | |
795 | symbolS *sym; | |
796 | asection *symsec; | |
797 | ||
798 | #ifdef DEBUG5 | |
799 | fprintf (stderr, "\n\nadjusting fixup:\n"); | |
800 | print_fixup (fixp); | |
801 | #endif | |
802 | ||
803 | sym = fixp->fx_addsy; | |
804 | ||
805 | /* All symbols should have already been resolved at this | |
806 | point. It is possible to see unresolved expression | |
807 | symbols, though, since they are not in the regular symbol | |
808 | table. */ | |
df44284e | 809 | resolve_symbol_value (sym); |
efaf0ba4 | 810 | |
49309057 | 811 | if (fixp->fx_subsy != NULL) |
6386f3a7 | 812 | resolve_symbol_value (fixp->fx_subsy); |
252b5132 RH |
813 | |
814 | /* If this symbol is equated to an undefined symbol, convert | |
815 | the fixup to being against that symbol. */ | |
df44284e | 816 | if (symbol_equated_reloc_p (sym)) |
252b5132 | 817 | { |
49309057 ILT |
818 | fixp->fx_offset += symbol_get_value_expression (sym)->X_add_number; |
819 | sym = symbol_get_value_expression (sym)->X_add_symbol; | |
252b5132 RH |
820 | fixp->fx_addsy = sym; |
821 | } | |
822 | ||
df44284e | 823 | if (symbol_mri_common_p (sym)) |
252b5132 RH |
824 | { |
825 | /* These symbols are handled specially in fixup_segment. */ | |
df44284e | 826 | continue; |
252b5132 RH |
827 | } |
828 | ||
a161fe53 AM |
829 | /* If the symbol is undefined, common, weak, or global (ELF |
830 | shared libs), we can't replace it with the section symbol. */ | |
831 | if (S_FORCE_RELOC (fixp->fx_addsy)) | |
832 | continue; | |
833 | ||
834 | /* Is there some other (target cpu dependent) reason we can't adjust | |
835 | this one? (E.g. relocations involving function addresses on | |
836 | the PA. */ | |
837 | #ifdef tc_fix_adjustable | |
838 | if (! tc_fix_adjustable (fixp)) | |
839 | continue; | |
840 | #endif | |
841 | ||
842 | /* Since we're reducing to section symbols, don't attempt to reduce | |
843 | anything that's already using one. */ | |
844 | if (symbol_section_p (sym)) | |
845 | continue; | |
846 | ||
252b5132 | 847 | symsec = S_GET_SEGMENT (sym); |
252b5132 RH |
848 | if (symsec == NULL) |
849 | abort (); | |
efaf0ba4 | 850 | |
252b5132 RH |
851 | if (bfd_is_abs_section (symsec)) |
852 | { | |
a161fe53 AM |
853 | /* The fixup_segment routine normally will not use this |
854 | symbol in a relocation. */ | |
df44284e | 855 | continue; |
252b5132 RH |
856 | } |
857 | ||
7565ed77 ILT |
858 | /* Don't try to reduce relocs which refer to non-local symbols |
859 | in .linkonce sections. It can lead to confusion when a | |
860 | debugging section refers to a .linkonce section. I hope | |
861 | this will always be correct. */ | |
862 | if (symsec != sec && ! S_IS_LOCAL (sym)) | |
252b5132 | 863 | { |
a161fe53 AM |
864 | if ((symsec->flags & SEC_LINK_ONCE) != 0 |
865 | || (IS_ELF | |
866 | /* The GNU toolchain uses an extension for ELF: a | |
867 | section beginning with the magic string | |
868 | .gnu.linkonce is a linkonce section. */ | |
869 | && strncmp (segment_name (symsec), ".gnu.linkonce", | |
870 | sizeof ".gnu.linkonce" - 1) == 0)) | |
871 | continue; | |
252b5132 | 872 | } |
f7460f5f JJ |
873 | |
874 | /* Never adjust a reloc against local symbol in a merge section | |
875 | with non-zero addend. */ | |
df44284e | 876 | if ((symsec->flags & SEC_MERGE) != 0 && fixp->fx_offset != 0) |
a161fe53 | 877 | continue; |
13ae64f3 JJ |
878 | |
879 | /* Never adjust a reloc against TLS local symbol. */ | |
df44284e | 880 | if ((symsec->flags & SEC_THREAD_LOCAL) != 0) |
a161fe53 | 881 | continue; |
252b5132 | 882 | |
a161fe53 | 883 | /* We refetch the segment when calling section_symbol, rather |
252b5132 | 884 | than using symsec, because S_GET_VALUE may wind up changing |
efaf0ba4 | 885 | the section when it calls resolve_symbol_value. */ |
252b5132 RH |
886 | fixp->fx_offset += S_GET_VALUE (sym); |
887 | fixp->fx_addsy = section_symbol (S_GET_SEGMENT (sym)); | |
e723ef7c ILT |
888 | #ifdef DEBUG5 |
889 | fprintf (stderr, "\nadjusted fixup:\n"); | |
890 | print_fixup (fixp); | |
891 | #endif | |
252b5132 | 892 | } |
252b5132 RH |
893 | |
894 | dump_section_relocs (abfd, sec, stderr); | |
895 | } | |
896 | ||
a161fe53 AM |
897 | static void |
898 | fix_segment (abfd, sec, xxx) | |
899 | bfd *abfd ATTRIBUTE_UNUSED; | |
900 | asection *sec; | |
901 | PTR xxx ATTRIBUTE_UNUSED; | |
902 | { | |
903 | segment_info_type *seginfo = seg_info (sec); | |
904 | ||
905 | fixup_segment (seginfo->fix_root, sec); | |
906 | } | |
907 | ||
252b5132 RH |
908 | static void |
909 | write_relocs (abfd, sec, xxx) | |
910 | bfd *abfd; | |
911 | asection *sec; | |
ab9da554 | 912 | PTR xxx ATTRIBUTE_UNUSED; |
252b5132 RH |
913 | { |
914 | segment_info_type *seginfo = seg_info (sec); | |
927781e2 | 915 | unsigned int i; |
252b5132 RH |
916 | unsigned int n; |
917 | arelent **relocs; | |
918 | fixS *fixp; | |
919 | char *err; | |
920 | ||
921 | /* If seginfo is NULL, we did not create this section; don't do | |
922 | anything with it. */ | |
923 | if (seginfo == NULL) | |
924 | return; | |
925 | ||
252b5132 RH |
926 | n = 0; |
927 | for (fixp = seginfo->fix_root; fixp; fixp = fixp->fx_next) | |
928 | n++; | |
929 | ||
930 | #ifndef RELOC_EXPANSION_POSSIBLE | |
931 | /* Set up reloc information as well. */ | |
932 | relocs = (arelent **) xmalloc (n * sizeof (arelent *)); | |
efaf0ba4 | 933 | memset ((char *) relocs, 0, n * sizeof (arelent *)); |
252b5132 RH |
934 | |
935 | i = 0; | |
936 | for (fixp = seginfo->fix_root; fixp != (fixS *) NULL; fixp = fixp->fx_next) | |
937 | { | |
938 | arelent *reloc; | |
939 | bfd_reloc_status_type s; | |
940 | symbolS *sym; | |
941 | ||
942 | if (fixp->fx_done) | |
943 | { | |
944 | n--; | |
945 | continue; | |
946 | } | |
947 | ||
948 | /* If this is an undefined symbol which was equated to another | |
e0890092 | 949 | symbol, then generate the reloc against the latter symbol |
252b5132 RH |
950 | rather than the former. */ |
951 | sym = fixp->fx_addsy; | |
e0890092 | 952 | while (symbol_equated_reloc_p (sym)) |
252b5132 RH |
953 | { |
954 | symbolS *n; | |
955 | ||
956 | /* We must avoid looping, as that can occur with a badly | |
957 | written program. */ | |
49309057 | 958 | n = symbol_get_value_expression (sym)->X_add_symbol; |
252b5132 RH |
959 | if (n == sym) |
960 | break; | |
49309057 | 961 | fixp->fx_offset += symbol_get_value_expression (sym)->X_add_number; |
252b5132 RH |
962 | sym = n; |
963 | } | |
964 | fixp->fx_addsy = sym; | |
965 | ||
966 | reloc = tc_gen_reloc (sec, fixp); | |
967 | if (!reloc) | |
968 | { | |
969 | n--; | |
970 | continue; | |
971 | } | |
972 | ||
973 | #if 0 | |
974 | /* This test is triggered inappropriately for the SH. */ | |
975 | if (fixp->fx_where + fixp->fx_size | |
976 | > fixp->fx_frag->fr_fix + fixp->fx_frag->fr_offset) | |
977 | abort (); | |
978 | #endif | |
979 | ||
980 | s = bfd_install_relocation (stdoutput, reloc, | |
981 | fixp->fx_frag->fr_literal, | |
982 | fixp->fx_frag->fr_address, | |
983 | sec, &err); | |
984 | switch (s) | |
985 | { | |
986 | case bfd_reloc_ok: | |
987 | break; | |
988 | case bfd_reloc_overflow: | |
df44284e AM |
989 | as_bad_where (fixp->fx_file, fixp->fx_line, |
990 | _("relocation overflow")); | |
252b5132 RH |
991 | break; |
992 | case bfd_reloc_outofrange: | |
df44284e AM |
993 | as_bad_where (fixp->fx_file, fixp->fx_line, |
994 | _("relocation out of range")); | |
252b5132 RH |
995 | break; |
996 | default: | |
997 | as_fatal (_("%s:%u: bad return from bfd_install_relocation: %x"), | |
998 | fixp->fx_file, fixp->fx_line, s); | |
999 | } | |
1000 | relocs[i++] = reloc; | |
1001 | } | |
1002 | #else | |
1003 | n = n * MAX_RELOC_EXPANSION; | |
1004 | /* Set up reloc information as well. */ | |
1005 | relocs = (arelent **) xmalloc (n * sizeof (arelent *)); | |
1006 | ||
1007 | i = 0; | |
1008 | for (fixp = seginfo->fix_root; fixp != (fixS *) NULL; fixp = fixp->fx_next) | |
1009 | { | |
1010 | arelent **reloc; | |
1011 | char *data; | |
1012 | bfd_reloc_status_type s; | |
1013 | symbolS *sym; | |
1014 | int j; | |
1015 | ||
1016 | if (fixp->fx_done) | |
1017 | { | |
1018 | n--; | |
1019 | continue; | |
1020 | } | |
1021 | ||
1022 | /* If this is an undefined symbol which was equated to another | |
44852b19 | 1023 | symbol, then generate the reloc against the latter symbol |
252b5132 RH |
1024 | rather than the former. */ |
1025 | sym = fixp->fx_addsy; | |
e0890092 | 1026 | while (symbol_equated_reloc_p (sym)) |
df44284e AM |
1027 | { |
1028 | symbolS *n; | |
1029 | ||
1030 | /* We must avoid looping, as that can occur with a badly | |
1031 | written program. */ | |
1032 | n = symbol_get_value_expression (sym)->X_add_symbol; | |
1033 | if (n == sym) | |
1034 | break; | |
1035 | fixp->fx_offset += symbol_get_value_expression (sym)->X_add_number; | |
1036 | sym = n; | |
1037 | } | |
252b5132 RH |
1038 | fixp->fx_addsy = sym; |
1039 | ||
1040 | reloc = tc_gen_reloc (sec, fixp); | |
1041 | ||
1042 | for (j = 0; reloc[j]; j++) | |
1043 | { | |
efaf0ba4 NC |
1044 | relocs[i++] = reloc[j]; |
1045 | assert (i <= n); | |
252b5132 RH |
1046 | } |
1047 | data = fixp->fx_frag->fr_literal + fixp->fx_where; | |
1048 | if (fixp->fx_where + fixp->fx_size | |
1049 | > fixp->fx_frag->fr_fix + fixp->fx_frag->fr_offset) | |
1050 | as_bad_where (fixp->fx_file, fixp->fx_line, | |
1051 | _("internal error: fixup not contained within frag")); | |
1052 | for (j = 0; reloc[j]; j++) | |
efaf0ba4 | 1053 | { |
252b5132 RH |
1054 | s = bfd_install_relocation (stdoutput, reloc[j], |
1055 | fixp->fx_frag->fr_literal, | |
1056 | fixp->fx_frag->fr_address, | |
1057 | sec, &err); | |
efaf0ba4 | 1058 | switch (s) |
252b5132 RH |
1059 | { |
1060 | case bfd_reloc_ok: | |
1061 | break; | |
1062 | case bfd_reloc_overflow: | |
1063 | as_bad_where (fixp->fx_file, fixp->fx_line, | |
1064 | _("relocation overflow")); | |
1065 | break; | |
df44284e AM |
1066 | case bfd_reloc_outofrange: |
1067 | as_bad_where (fixp->fx_file, fixp->fx_line, | |
1068 | _("relocation out of range")); | |
1069 | break; | |
252b5132 | 1070 | default: |
df44284e AM |
1071 | as_fatal (_("%s:%u: bad return from bfd_install_relocation: %x"), |
1072 | fixp->fx_file, fixp->fx_line, s); | |
252b5132 | 1073 | } |
efaf0ba4 | 1074 | } |
252b5132 RH |
1075 | } |
1076 | n = i; | |
1077 | #endif | |
1078 | ||
1079 | #ifdef DEBUG4 | |
1080 | { | |
1081 | int i, j, nsyms; | |
1082 | asymbol **sympp; | |
1083 | sympp = bfd_get_outsymbols (stdoutput); | |
1084 | nsyms = bfd_get_symcount (stdoutput); | |
1085 | for (i = 0; i < n; i++) | |
1086 | if (((*relocs[i]->sym_ptr_ptr)->flags & BSF_SECTION_SYM) == 0) | |
1087 | { | |
1088 | for (j = 0; j < nsyms; j++) | |
1089 | if (sympp[j] == *relocs[i]->sym_ptr_ptr) | |
1090 | break; | |
1091 | if (j == nsyms) | |
1092 | abort (); | |
1093 | } | |
1094 | } | |
1095 | #endif | |
1096 | ||
1097 | if (n) | |
1098 | bfd_set_reloc (stdoutput, sec, relocs, n); | |
1099 | else | |
1100 | bfd_set_section_flags (abfd, sec, | |
1101 | (bfd_get_section_flags (abfd, sec) | |
1102 | & (flagword) ~SEC_RELOC)); | |
1103 | ||
945a1a6b ILT |
1104 | #ifdef SET_SECTION_RELOCS |
1105 | SET_SECTION_RELOCS (sec, relocs, n); | |
1106 | #endif | |
1107 | ||
252b5132 RH |
1108 | #ifdef DEBUG3 |
1109 | { | |
1110 | int i; | |
1111 | arelent *r; | |
1112 | asymbol *s; | |
1113 | fprintf (stderr, "relocs for sec %s\n", sec->name); | |
1114 | for (i = 0; i < n; i++) | |
1115 | { | |
1116 | r = relocs[i]; | |
1117 | s = *r->sym_ptr_ptr; | |
1118 | fprintf (stderr, " reloc %2d @%08x off %4x : sym %-10s addend %x\n", | |
1119 | i, r, r->address, s->name, r->addend); | |
1120 | } | |
1121 | } | |
1122 | #endif | |
1123 | } | |
1124 | ||
1125 | static void | |
1126 | write_contents (abfd, sec, xxx) | |
ab9da554 | 1127 | bfd *abfd ATTRIBUTE_UNUSED; |
252b5132 | 1128 | asection *sec; |
ab9da554 | 1129 | PTR xxx ATTRIBUTE_UNUSED; |
252b5132 RH |
1130 | { |
1131 | segment_info_type *seginfo = seg_info (sec); | |
1132 | unsigned long offset = 0; | |
1133 | fragS *f; | |
1134 | ||
1135 | /* Write out the frags. */ | |
1136 | if (seginfo == NULL | |
efaf0ba4 | 1137 | || !(bfd_get_section_flags (abfd, sec) & SEC_HAS_CONTENTS)) |
252b5132 RH |
1138 | return; |
1139 | ||
1140 | for (f = seginfo->frchainP->frch_root; | |
1141 | f; | |
1142 | f = f->fr_next) | |
1143 | { | |
1144 | int x; | |
1145 | unsigned long fill_size; | |
1146 | char *fill_literal; | |
1147 | long count; | |
1148 | ||
1149 | assert (f->fr_type == rs_fill); | |
1150 | if (f->fr_fix) | |
1151 | { | |
1152 | x = bfd_set_section_contents (stdoutput, sec, | |
1153 | f->fr_literal, (file_ptr) offset, | |
1154 | (bfd_size_type) f->fr_fix); | |
1155 | if (x == false) | |
1156 | { | |
1157 | bfd_perror (stdoutput->filename); | |
1158 | as_perror (_("FATAL: Can't write %s"), stdoutput->filename); | |
1159 | exit (EXIT_FAILURE); | |
1160 | } | |
1161 | offset += f->fr_fix; | |
1162 | } | |
1163 | fill_literal = f->fr_literal + f->fr_fix; | |
1164 | fill_size = f->fr_var; | |
1165 | count = f->fr_offset; | |
1166 | assert (count >= 0); | |
1167 | if (fill_size && count) | |
1168 | { | |
1169 | char buf[256]; | |
efaf0ba4 | 1170 | if (fill_size > sizeof (buf)) |
252b5132 | 1171 | { |
efaf0ba4 | 1172 | /* Do it the old way. Can this ever happen? */ |
252b5132 RH |
1173 | while (count--) |
1174 | { | |
1175 | x = bfd_set_section_contents (stdoutput, sec, | |
1176 | fill_literal, | |
1177 | (file_ptr) offset, | |
1178 | (bfd_size_type) fill_size); | |
1179 | if (x == false) | |
1180 | { | |
1181 | bfd_perror (stdoutput->filename); | |
efaf0ba4 NC |
1182 | as_perror (_("FATAL: Can't write %s"), |
1183 | stdoutput->filename); | |
252b5132 RH |
1184 | exit (EXIT_FAILURE); |
1185 | } | |
1186 | offset += fill_size; | |
1187 | } | |
1188 | } | |
1189 | else | |
1190 | { | |
1191 | /* Build a buffer full of fill objects and output it as | |
1192 | often as necessary. This saves on the overhead of | |
1193 | potentially lots of bfd_set_section_contents calls. */ | |
1194 | int n_per_buf, i; | |
1195 | if (fill_size == 1) | |
1196 | { | |
1197 | n_per_buf = sizeof (buf); | |
1198 | memset (buf, *fill_literal, n_per_buf); | |
1199 | } | |
1200 | else | |
1201 | { | |
1202 | char *bufp; | |
efaf0ba4 | 1203 | n_per_buf = sizeof (buf) / fill_size; |
252b5132 | 1204 | for (i = n_per_buf, bufp = buf; i; i--, bufp += fill_size) |
efaf0ba4 | 1205 | memcpy (bufp, fill_literal, fill_size); |
252b5132 RH |
1206 | } |
1207 | for (; count > 0; count -= n_per_buf) | |
1208 | { | |
1209 | n_per_buf = n_per_buf > count ? count : n_per_buf; | |
efaf0ba4 NC |
1210 | x = bfd_set_section_contents |
1211 | (stdoutput, sec, buf, (file_ptr) offset, | |
1212 | (bfd_size_type) n_per_buf * fill_size); | |
252b5132 | 1213 | if (x != true) |
0e389e77 | 1214 | as_fatal (_("cannot write to output file")); |
252b5132 RH |
1215 | offset += n_per_buf * fill_size; |
1216 | } | |
1217 | } | |
1218 | } | |
1219 | } | |
1220 | } | |
1221 | #endif | |
1222 | ||
1223 | #if defined(BFD_ASSEMBLER) || (!defined (BFD) && !defined(OBJ_AOUT)) | |
1224 | static void | |
1225 | merge_data_into_text () | |
1226 | { | |
1227 | #if defined(BFD_ASSEMBLER) || defined(MANY_SEGMENTS) | |
1228 | seg_info (text_section)->frchainP->frch_last->fr_next = | |
1229 | seg_info (data_section)->frchainP->frch_root; | |
1230 | seg_info (text_section)->frchainP->frch_last = | |
1231 | seg_info (data_section)->frchainP->frch_last; | |
1232 | seg_info (data_section)->frchainP = 0; | |
1233 | #else | |
1234 | fixS *tmp; | |
1235 | ||
1236 | text_last_frag->fr_next = data_frag_root; | |
1237 | text_last_frag = data_last_frag; | |
1238 | data_last_frag = NULL; | |
1239 | data_frag_root = NULL; | |
1240 | if (text_fix_root) | |
1241 | { | |
1242 | for (tmp = text_fix_root; tmp->fx_next; tmp = tmp->fx_next);; | |
1243 | tmp->fx_next = data_fix_root; | |
1244 | text_fix_tail = data_fix_tail; | |
1245 | } | |
1246 | else | |
1247 | text_fix_root = data_fix_root; | |
1248 | data_fix_root = NULL; | |
1249 | #endif | |
1250 | } | |
efaf0ba4 | 1251 | #endif /* BFD_ASSEMBLER || (! BFD && ! OBJ_AOUT) */ |
252b5132 RH |
1252 | |
1253 | #if !defined (BFD_ASSEMBLER) && !defined (BFD) | |
1254 | static void | |
1255 | relax_and_size_all_segments () | |
1256 | { | |
1257 | fragS *fragP; | |
1258 | ||
1259 | relax_segment (text_frag_root, SEG_TEXT); | |
1260 | relax_segment (data_frag_root, SEG_DATA); | |
1261 | relax_segment (bss_frag_root, SEG_BSS); | |
252b5132 | 1262 | |
efaf0ba4 | 1263 | /* Now the addresses of frags are correct within the segment. */ |
252b5132 RH |
1264 | know (text_last_frag->fr_type == rs_fill && text_last_frag->fr_offset == 0); |
1265 | H_SET_TEXT_SIZE (&headers, text_last_frag->fr_address); | |
1266 | text_last_frag->fr_address = H_GET_TEXT_SIZE (&headers); | |
1267 | ||
efaf0ba4 NC |
1268 | /* Join the 2 segments into 1 huge segment. |
1269 | To do this, re-compute every rn_address in the SEG_DATA frags. | |
1270 | Then join the data frags after the text frags. | |
58a77e41 | 1271 | |
efaf0ba4 | 1272 | Determine a_data [length of data segment]. */ |
252b5132 RH |
1273 | if (data_frag_root) |
1274 | { | |
1275 | register relax_addressT slide; | |
1276 | ||
efaf0ba4 NC |
1277 | know ((text_last_frag->fr_type == rs_fill) |
1278 | && (text_last_frag->fr_offset == 0)); | |
252b5132 RH |
1279 | |
1280 | H_SET_DATA_SIZE (&headers, data_last_frag->fr_address); | |
1281 | data_last_frag->fr_address = H_GET_DATA_SIZE (&headers); | |
efaf0ba4 | 1282 | slide = H_GET_TEXT_SIZE (&headers); /* & in file of the data segment. */ |
252b5132 RH |
1283 | #ifdef OBJ_BOUT |
1284 | #define RoundUp(N,S) (((N)+(S)-1)&-(S)) | |
1285 | /* For b.out: If the data section has a strict alignment | |
1286 | requirement, its load address in the .o file will be | |
1287 | rounded up from the size of the text section. These | |
1288 | two values are *not* the same! Similarly for the bss | |
1289 | section.... */ | |
1290 | slide = RoundUp (slide, 1 << section_alignment[SEG_DATA]); | |
1291 | #endif | |
1292 | ||
1293 | for (fragP = data_frag_root; fragP; fragP = fragP->fr_next) | |
efaf0ba4 | 1294 | fragP->fr_address += slide; |
252b5132 RH |
1295 | |
1296 | know (text_last_frag != 0); | |
1297 | text_last_frag->fr_next = data_frag_root; | |
1298 | } | |
1299 | else | |
1300 | { | |
1301 | H_SET_DATA_SIZE (&headers, 0); | |
1302 | } | |
1303 | ||
1304 | #ifdef OBJ_BOUT | |
1305 | /* See above comments on b.out data section address. */ | |
1306 | { | |
1307 | long bss_vma; | |
1308 | if (data_last_frag == 0) | |
1309 | bss_vma = H_GET_TEXT_SIZE (&headers); | |
1310 | else | |
1311 | bss_vma = data_last_frag->fr_address; | |
1312 | bss_vma = RoundUp (bss_vma, 1 << section_alignment[SEG_BSS]); | |
1313 | bss_address_frag.fr_address = bss_vma; | |
1314 | } | |
efaf0ba4 | 1315 | #else /* ! OBJ_BOUT */ |
252b5132 RH |
1316 | bss_address_frag.fr_address = (H_GET_TEXT_SIZE (&headers) + |
1317 | H_GET_DATA_SIZE (&headers)); | |
1318 | ||
efaf0ba4 | 1319 | #endif /* ! OBJ_BOUT */ |
252b5132 | 1320 | |
efaf0ba4 | 1321 | /* Slide all the frags. */ |
252b5132 RH |
1322 | if (bss_frag_root) |
1323 | { | |
1324 | relax_addressT slide = bss_address_frag.fr_address; | |
1325 | ||
1326 | for (fragP = bss_frag_root; fragP; fragP = fragP->fr_next) | |
efaf0ba4 | 1327 | fragP->fr_address += slide; |
252b5132 RH |
1328 | } |
1329 | ||
1330 | if (bss_last_frag) | |
1331 | H_SET_BSS_SIZE (&headers, | |
1332 | bss_last_frag->fr_address - bss_frag_root->fr_address); | |
1333 | else | |
1334 | H_SET_BSS_SIZE (&headers, 0); | |
1335 | } | |
efaf0ba4 | 1336 | #endif /* ! BFD_ASSEMBLER && ! BFD */ |
252b5132 RH |
1337 | |
1338 | #if defined (BFD_ASSEMBLER) || !defined (BFD) | |
1339 | ||
1340 | #ifdef BFD_ASSEMBLER | |
1341 | static void | |
1342 | set_symtab () | |
1343 | { | |
1344 | int nsyms; | |
1345 | asymbol **asympp; | |
1346 | symbolS *symp; | |
1347 | boolean result; | |
0e1a166b | 1348 | extern PTR bfd_alloc PARAMS ((bfd *, bfd_size_type)); |
252b5132 RH |
1349 | |
1350 | /* Count symbols. We can't rely on a count made by the loop in | |
1351 | write_object_file, because *_frob_file may add a new symbol or | |
1352 | two. */ | |
1353 | nsyms = 0; | |
1354 | for (symp = symbol_rootP; symp; symp = symbol_next (symp)) | |
1355 | nsyms++; | |
1356 | ||
1357 | if (nsyms) | |
1358 | { | |
1359 | int i; | |
0e1a166b | 1360 | bfd_size_type amt = (bfd_size_type) nsyms * sizeof (asymbol *); |
252b5132 | 1361 | |
0e1a166b | 1362 | asympp = (asymbol **) bfd_alloc (stdoutput, amt); |
252b5132 RH |
1363 | symp = symbol_rootP; |
1364 | for (i = 0; i < nsyms; i++, symp = symbol_next (symp)) | |
1365 | { | |
49309057 ILT |
1366 | asympp[i] = symbol_get_bfdsym (symp); |
1367 | symbol_mark_written (symp); | |
252b5132 RH |
1368 | } |
1369 | } | |
1370 | else | |
1371 | asympp = 0; | |
1372 | result = bfd_set_symtab (stdoutput, asympp, nsyms); | |
1373 | assert (result == true); | |
1374 | symbol_table_frozen = 1; | |
1375 | } | |
1376 | #endif | |
1377 | ||
6aa4f516 | 1378 | #if defined (BFD_ASSEMBLER) && defined (OBJ_COFF) && defined (TE_GO32) |
dbddefbf NC |
1379 | static void |
1380 | set_segment_vma (abfd, sec, xxx) | |
1381 | bfd *abfd; | |
1382 | asection *sec; | |
1383 | PTR xxx ATTRIBUTE_UNUSED; | |
1384 | { | |
1385 | static bfd_vma addr = 0; | |
efaf0ba4 | 1386 | |
dbddefbf NC |
1387 | bfd_set_section_vma (abfd, sec, addr); |
1388 | addr += bfd_section_size (abfd, sec); | |
1389 | } | |
efaf0ba4 | 1390 | #endif /* BFD_ASSEMBLER && OBJ_COFF && !TE_PE */ |
dbddefbf | 1391 | |
252b5132 RH |
1392 | /* Finish the subsegments. After every sub-segment, we fake an |
1393 | ".align ...". This conforms to BSD4.2 brane-damage. We then fake | |
1394 | ".fill 0" because that is the kind of frag that requires least | |
1395 | thought. ".align" frags like to have a following frag since that | |
1396 | makes calculating their intended length trivial. */ | |
1397 | ||
1398 | #ifndef SUB_SEGMENT_ALIGN | |
18e1d487 AM |
1399 | #ifdef HANDLE_ALIGN |
1400 | /* The last subsegment gets an aligment corresponding to the alignment | |
1401 | of the section. This allows proper nop-filling at the end of | |
1402 | code-bearing sections. */ | |
1403 | #define SUB_SEGMENT_ALIGN(SEG, FRCHAIN) \ | |
1404 | (!(FRCHAIN)->frch_next || (FRCHAIN)->frch_next->frch_seg != (SEG) \ | |
1405 | ? get_recorded_alignment (SEG) : 0) | |
1406 | #else | |
252b5132 | 1407 | #ifdef BFD_ASSEMBLER |
18e1d487 | 1408 | #define SUB_SEGMENT_ALIGN(SEG, FRCHAIN) 0 |
252b5132 | 1409 | #else |
18e1d487 AM |
1410 | #define SUB_SEGMENT_ALIGN(SEG, FRCHAIN) 2 |
1411 | #endif | |
252b5132 RH |
1412 | #endif |
1413 | #endif | |
1414 | ||
1415 | void | |
1416 | subsegs_finish () | |
1417 | { | |
1418 | struct frchain *frchainP; | |
1419 | ||
1420 | for (frchainP = frchain_root; frchainP; frchainP = frchainP->frch_next) | |
1421 | { | |
18e1d487 | 1422 | int alignment = 0; |
0a9ef439 | 1423 | |
252b5132 RH |
1424 | subseg_set (frchainP->frch_seg, frchainP->frch_subseg); |
1425 | ||
1426 | /* This now gets called even if we had errors. In that case, | |
1427 | any alignment is meaningless, and, moreover, will look weird | |
1428 | if we are generating a listing. */ | |
18e1d487 AM |
1429 | if (!had_errors ()) |
1430 | alignment = SUB_SEGMENT_ALIGN (now_seg, frchainP); | |
0a9ef439 | 1431 | |
799051fc RH |
1432 | if (subseg_text_p (now_seg)) |
1433 | frag_align_code (alignment, 0); | |
1434 | else | |
1435 | frag_align (alignment, 0, 0); | |
252b5132 RH |
1436 | |
1437 | /* frag_align will have left a new frag. | |
1438 | Use this last frag for an empty ".fill". | |
1439 | ||
1440 | For this segment ... | |
1441 | Create a last frag. Do not leave a "being filled in frag". */ | |
252b5132 RH |
1442 | frag_wane (frag_now); |
1443 | frag_now->fr_fix = 0; | |
1444 | know (frag_now->fr_next == NULL); | |
1445 | } | |
1446 | } | |
1447 | ||
1448 | /* Write the object file. */ | |
1449 | ||
1450 | void | |
1451 | write_object_file () | |
1452 | { | |
1453 | #if ! defined (BFD_ASSEMBLER) || ! defined (WORKING_DOT_WORD) | |
efaf0ba4 | 1454 | fragS *fragP; /* Track along all frags. */ |
252b5132 RH |
1455 | #endif |
1456 | ||
1457 | /* Do we really want to write it? */ | |
1458 | { | |
1459 | int n_warns, n_errs; | |
1460 | n_warns = had_warnings (); | |
1461 | n_errs = had_errors (); | |
1462 | /* The -Z flag indicates that an object file should be generated, | |
1463 | regardless of warnings and errors. */ | |
1464 | if (flag_always_generate_output) | |
1465 | { | |
1466 | if (n_warns || n_errs) | |
0e389e77 | 1467 | as_warn (_("%d error%s, %d warning%s, generating bad object file"), |
252b5132 RH |
1468 | n_errs, n_errs == 1 ? "" : "s", |
1469 | n_warns, n_warns == 1 ? "" : "s"); | |
1470 | } | |
1471 | else | |
1472 | { | |
1473 | if (n_errs) | |
0e389e77 | 1474 | as_fatal (_("%d error%s, %d warning%s, no object file generated"), |
252b5132 RH |
1475 | n_errs, n_errs == 1 ? "" : "s", |
1476 | n_warns, n_warns == 1 ? "" : "s"); | |
1477 | } | |
1478 | } | |
1479 | ||
1480 | #ifdef OBJ_VMS | |
1481 | /* Under VMS we try to be compatible with VAX-11 "C". Thus, we call | |
1482 | a routine to check for the definition of the procedure "_main", | |
efaf0ba4 | 1483 | and if so -- fix it up so that it can be program entry point. */ |
252b5132 | 1484 | vms_check_for_main (); |
efaf0ba4 | 1485 | #endif /* OBJ_VMS */ |
252b5132 RH |
1486 | |
1487 | /* From now on, we don't care about sub-segments. Build one frag chain | |
1488 | for each segment. Linked thru fr_next. */ | |
1489 | ||
1490 | #ifdef BFD_ASSEMBLER | |
1491 | /* Remove the sections created by gas for its own purposes. */ | |
1492 | { | |
7c6beb69 | 1493 | asection **seclist; |
252b5132 RH |
1494 | int i; |
1495 | ||
1496 | seclist = &stdoutput->sections; | |
7c6beb69 | 1497 | while (*seclist) |
252b5132 | 1498 | { |
7c6beb69 | 1499 | if (*seclist == reg_section || *seclist == expr_section) |
252b5132 | 1500 | { |
7c6beb69 | 1501 | bfd_section_list_remove (stdoutput, seclist); |
252b5132 | 1502 | stdoutput->section_count--; |
252b5132 | 1503 | } |
7c6beb69 | 1504 | else |
252b5132 RH |
1505 | seclist = &(*seclist)->next; |
1506 | } | |
1507 | i = 0; | |
1508 | bfd_map_over_sections (stdoutput, renumber_sections, &i); | |
1509 | } | |
1510 | ||
1511 | bfd_map_over_sections (stdoutput, chain_frchains_together, (char *) 0); | |
1512 | #else | |
1513 | remove_subsegs (frchain_root, SEG_TEXT, &text_frag_root, &text_last_frag); | |
1514 | remove_subsegs (data0_frchainP, SEG_DATA, &data_frag_root, &data_last_frag); | |
1515 | remove_subsegs (bss0_frchainP, SEG_BSS, &bss_frag_root, &bss_last_frag); | |
1516 | #endif | |
1517 | ||
1518 | /* We have two segments. If user gave -R flag, then we must put the | |
1519 | data frags into the text segment. Do this before relaxing so | |
1520 | we know to take advantage of -R and make shorter addresses. */ | |
1521 | #if !defined (OBJ_AOUT) || defined (BFD_ASSEMBLER) | |
1522 | if (flag_readonly_data_in_text) | |
1523 | { | |
1524 | merge_data_into_text (); | |
1525 | } | |
1526 | #endif | |
1527 | ||
1528 | #ifdef BFD_ASSEMBLER | |
e46d99eb AM |
1529 | while (1) |
1530 | { | |
1531 | int changed; | |
1532 | ||
aacb5251 HPN |
1533 | #ifndef WORKING_DOT_WORD |
1534 | /* We need to reset the markers in the broken word list and | |
1535 | associated frags between calls to relax_segment (via | |
1536 | relax_seg). Since the broken word list is global, we do it | |
1537 | once per round, rather than locally in relax_segment for each | |
1538 | segment. */ | |
1539 | struct broken_word *brokp; | |
1540 | ||
1541 | for (brokp = broken_words; | |
1542 | brokp != (struct broken_word *) NULL; | |
1543 | brokp = brokp->next_broken_word) | |
1544 | { | |
1545 | brokp->added = 0; | |
1546 | ||
1547 | if (brokp->dispfrag != (fragS *) NULL | |
1548 | && brokp->dispfrag->fr_type == rs_broken_word) | |
1549 | brokp->dispfrag->fr_subtype = 0; | |
1550 | } | |
1551 | #endif | |
1552 | ||
e46d99eb AM |
1553 | changed = 0; |
1554 | bfd_map_over_sections (stdoutput, relax_seg, &changed); | |
1555 | if (!changed) | |
1556 | break; | |
1557 | } | |
e027f3e8 | 1558 | |
87548816 NC |
1559 | /* Note - Most ports will use the default value of |
1560 | TC_FINALIZE_SYMS_BEFORE_SIZE_SEG, which 1. This will force | |
1561 | local symbols to be resolved, removing their frag information. | |
1562 | Some ports however, will not have finished relaxing all of | |
1563 | their frags and will still need the local symbol frag | |
1564 | information. These ports can set | |
1565 | TC_FINALIZE_SYMS_BEFORE_SIZE_SEG to 0. */ | |
1566 | finalize_syms = TC_FINALIZE_SYMS_BEFORE_SIZE_SEG; | |
1567 | ||
e46d99eb | 1568 | bfd_map_over_sections (stdoutput, size_seg, (char *) 0); |
252b5132 RH |
1569 | #else |
1570 | relax_and_size_all_segments (); | |
e027f3e8 | 1571 | #endif /* BFD_ASSEMBLER */ |
e46d99eb | 1572 | |
38b87a1b NC |
1573 | /* Relaxation has completed. Freeze all syms. */ |
1574 | finalize_syms = 1; | |
1575 | ||
6aa4f516 | 1576 | #if defined (BFD_ASSEMBLER) && defined (OBJ_COFF) && defined (TE_GO32) |
dbddefbf | 1577 | /* Now that the segments have their final sizes, run through the |
6aa4f516 NC |
1578 | sections and set their vma and lma. !BFD gas sets them, and BFD gas |
1579 | should too. Currently, only DJGPP uses this code, but other | |
1580 | COFF targets may need to execute this too. */ | |
dbddefbf NC |
1581 | bfd_map_over_sections (stdoutput, set_segment_vma, (char *) 0); |
1582 | #endif | |
1583 | ||
252b5132 | 1584 | #ifndef BFD_ASSEMBLER |
efaf0ba4 | 1585 | /* Crawl the symbol chain. |
58a77e41 | 1586 | |
efaf0ba4 NC |
1587 | For each symbol whose value depends on a frag, take the address of |
1588 | that frag and subsume it into the value of the symbol. | |
1589 | After this, there is just one way to lookup a symbol value. | |
1590 | Values are left in their final state for object file emission. | |
1591 | We adjust the values of 'L' local symbols, even if we do | |
1592 | not intend to emit them to the object file, because their values | |
1593 | are needed for fix-ups. | |
58a77e41 | 1594 | |
efaf0ba4 NC |
1595 | Unless we saw a -L flag, remove all symbols that begin with 'L' |
1596 | from the symbol chain. (They are still pointed to by the fixes.) | |
58a77e41 | 1597 | |
efaf0ba4 NC |
1598 | Count the remaining symbols. |
1599 | Assign a symbol number to each symbol. | |
1600 | Count the number of string-table chars we will emit. | |
1601 | Put this info into the headers as appropriate. */ | |
252b5132 RH |
1602 | know (zero_address_frag.fr_address == 0); |
1603 | string_byte_count = sizeof (string_byte_count); | |
1604 | ||
1605 | obj_crawl_symbol_chain (&headers); | |
1606 | ||
1607 | if (string_byte_count == sizeof (string_byte_count)) | |
1608 | string_byte_count = 0; | |
1609 | ||
1610 | H_SET_STRING_SIZE (&headers, string_byte_count); | |
1611 | ||
efaf0ba4 NC |
1612 | /* Addresses of frags now reflect addresses we use in the object file. |
1613 | Symbol values are correct. | |
1614 | Scan the frags, converting any ".org"s and ".align"s to ".fill"s. | |
1615 | Also converting any machine-dependent frags using md_convert_frag(); */ | |
252b5132 RH |
1616 | subseg_change (SEG_TEXT, 0); |
1617 | ||
1618 | for (fragP = text_frag_root; fragP; fragP = fragP->fr_next) | |
1619 | { | |
1620 | /* At this point we have linked all the frags into a single | |
1621 | chain. However, cvt_frag_to_fill may call md_convert_frag | |
1622 | which may call fix_new. We need to ensure that fix_new adds | |
1623 | the fixup to the right section. */ | |
1624 | if (fragP == data_frag_root) | |
1625 | subseg_change (SEG_DATA, 0); | |
1626 | ||
1627 | cvt_frag_to_fill (&headers, SEG_TEXT, fragP); | |
1628 | ||
1629 | /* Some assert macros don't work with # directives mixed in. */ | |
1630 | #ifndef NDEBUG | |
1631 | if (!(fragP->fr_next == NULL | |
1632 | #ifdef OBJ_BOUT | |
1633 | || fragP->fr_next == data_frag_root | |
1634 | #endif | |
1635 | || ((fragP->fr_next->fr_address - fragP->fr_address) | |
1636 | == (fragP->fr_fix + fragP->fr_offset * fragP->fr_var)))) | |
1637 | abort (); | |
1638 | #endif | |
1639 | } | |
efaf0ba4 | 1640 | #endif /* ! BFD_ASSEMBLER */ |
252b5132 RH |
1641 | |
1642 | #ifndef WORKING_DOT_WORD | |
1643 | { | |
1644 | struct broken_word *lie; | |
1645 | struct broken_word **prevP; | |
1646 | ||
1647 | prevP = &broken_words; | |
1648 | for (lie = broken_words; lie; lie = lie->next_broken_word) | |
1649 | if (!lie->added) | |
1650 | { | |
1651 | expressionS exp; | |
1652 | ||
1653 | subseg_change (lie->seg, lie->subseg); | |
1654 | exp.X_op = O_subtract; | |
1655 | exp.X_add_symbol = lie->add; | |
1656 | exp.X_op_symbol = lie->sub; | |
1657 | exp.X_add_number = lie->addnum; | |
1658 | #ifdef BFD_ASSEMBLER | |
1659 | #ifdef TC_CONS_FIX_NEW | |
1660 | TC_CONS_FIX_NEW (lie->frag, | |
efaf0ba4 NC |
1661 | lie->word_goes_here - lie->frag->fr_literal, |
1662 | 2, &exp); | |
252b5132 RH |
1663 | #else |
1664 | fix_new_exp (lie->frag, | |
1665 | lie->word_goes_here - lie->frag->fr_literal, | |
1666 | 2, &exp, 0, BFD_RELOC_16); | |
1667 | #endif | |
1668 | #else | |
1669 | #if defined(TC_SPARC) || defined(TC_A29K) || defined(NEED_FX_R_TYPE) | |
1670 | fix_new_exp (lie->frag, | |
1671 | lie->word_goes_here - lie->frag->fr_literal, | |
1672 | 2, &exp, 0, NO_RELOC); | |
1673 | #else | |
1674 | #ifdef TC_NS32K | |
1675 | fix_new_ns32k_exp (lie->frag, | |
1676 | lie->word_goes_here - lie->frag->fr_literal, | |
1677 | 2, &exp, 0, 0, 2, 0, 0); | |
1678 | #else | |
1679 | fix_new_exp (lie->frag, | |
1680 | lie->word_goes_here - lie->frag->fr_literal, | |
1681 | 2, &exp, 0, 0); | |
efaf0ba4 NC |
1682 | #endif /* TC_NS32K */ |
1683 | #endif /* TC_SPARC|TC_A29K|NEED_FX_R_TYPE */ | |
1684 | #endif /* BFD_ASSEMBLER */ | |
252b5132 RH |
1685 | *prevP = lie->next_broken_word; |
1686 | } | |
1687 | else | |
1688 | prevP = &(lie->next_broken_word); | |
1689 | ||
1690 | for (lie = broken_words; lie;) | |
1691 | { | |
1692 | struct broken_word *untruth; | |
1693 | char *table_ptr; | |
1694 | addressT table_addr; | |
1695 | addressT from_addr, to_addr; | |
1696 | int n, m; | |
1697 | ||
1698 | subseg_change (lie->seg, lie->subseg); | |
1699 | fragP = lie->dispfrag; | |
1700 | ||
1701 | /* Find out how many broken_words go here. */ | |
1702 | n = 0; | |
efaf0ba4 NC |
1703 | for (untruth = lie; |
1704 | untruth && untruth->dispfrag == fragP; | |
1705 | untruth = untruth->next_broken_word) | |
252b5132 RH |
1706 | if (untruth->added == 1) |
1707 | n++; | |
1708 | ||
1709 | table_ptr = lie->dispfrag->fr_opcode; | |
efaf0ba4 NC |
1710 | table_addr = (lie->dispfrag->fr_address |
1711 | + (table_ptr - lie->dispfrag->fr_literal)); | |
252b5132 RH |
1712 | /* Create the jump around the long jumps. This is a short |
1713 | jump from table_ptr+0 to table_ptr+n*long_jump_size. */ | |
1714 | from_addr = table_addr; | |
1715 | to_addr = table_addr + md_short_jump_size + n * md_long_jump_size; | |
efaf0ba4 NC |
1716 | md_create_short_jump (table_ptr, from_addr, to_addr, lie->dispfrag, |
1717 | lie->add); | |
252b5132 RH |
1718 | table_ptr += md_short_jump_size; |
1719 | table_addr += md_short_jump_size; | |
1720 | ||
efaf0ba4 NC |
1721 | for (m = 0; |
1722 | lie && lie->dispfrag == fragP; | |
1723 | m++, lie = lie->next_broken_word) | |
252b5132 RH |
1724 | { |
1725 | if (lie->added == 2) | |
1726 | continue; | |
efaf0ba4 NC |
1727 | /* Patch the jump table. */ |
1728 | /* This is the offset from ??? to table_ptr+0. */ | |
252b5132 | 1729 | to_addr = table_addr - S_GET_VALUE (lie->sub); |
753f6b12 HPN |
1730 | #ifdef TC_CHECK_ADJUSTED_BROKEN_DOT_WORD |
1731 | TC_CHECK_ADJUSTED_BROKEN_DOT_WORD (to_addr, lie); | |
252b5132 RH |
1732 | #endif |
1733 | md_number_to_chars (lie->word_goes_here, to_addr, 2); | |
efaf0ba4 NC |
1734 | for (untruth = lie->next_broken_word; |
1735 | untruth && untruth->dispfrag == fragP; | |
1736 | untruth = untruth->next_broken_word) | |
252b5132 RH |
1737 | { |
1738 | if (untruth->use_jump == lie) | |
1739 | md_number_to_chars (untruth->word_goes_here, to_addr, 2); | |
1740 | } | |
1741 | ||
efaf0ba4 NC |
1742 | /* Install the long jump. */ |
1743 | /* This is a long jump from table_ptr+0 to the final target. */ | |
252b5132 RH |
1744 | from_addr = table_addr; |
1745 | to_addr = S_GET_VALUE (lie->add) + lie->addnum; | |
efaf0ba4 NC |
1746 | md_create_long_jump (table_ptr, from_addr, to_addr, lie->dispfrag, |
1747 | lie->add); | |
252b5132 RH |
1748 | table_ptr += md_long_jump_size; |
1749 | table_addr += md_long_jump_size; | |
1750 | } | |
1751 | } | |
1752 | } | |
efaf0ba4 | 1753 | #endif /* not WORKING_DOT_WORD */ |
252b5132 RH |
1754 | |
1755 | #ifndef BFD_ASSEMBLER | |
1756 | #ifndef OBJ_VMS | |
efaf0ba4 | 1757 | { /* not vms */ |
252b5132 RH |
1758 | char *the_object_file; |
1759 | long object_file_size; | |
efaf0ba4 NC |
1760 | /* Scan every FixS performing fixups. We had to wait until now to |
1761 | do this because md_convert_frag() may have made some fixSs. */ | |
252b5132 RH |
1762 | int trsize, drsize; |
1763 | ||
1764 | subseg_change (SEG_TEXT, 0); | |
1765 | trsize = md_reloc_size * fixup_segment (text_fix_root, SEG_TEXT); | |
1766 | subseg_change (SEG_DATA, 0); | |
1767 | drsize = md_reloc_size * fixup_segment (data_fix_root, SEG_DATA); | |
1768 | H_SET_RELOCATION_SIZE (&headers, trsize, drsize); | |
1769 | ||
efaf0ba4 | 1770 | /* FIXME: Move this stuff into the pre-write-hook. */ |
252b5132 RH |
1771 | H_SET_MAGIC_NUMBER (&headers, magic_number_for_object_file); |
1772 | H_SET_ENTRY_POINT (&headers, 0); | |
1773 | ||
efaf0ba4 | 1774 | obj_pre_write_hook (&headers); /* Extra coff stuff. */ |
252b5132 RH |
1775 | |
1776 | object_file_size = H_GET_FILE_SIZE (&headers); | |
1777 | next_object_file_charP = the_object_file = xmalloc (object_file_size); | |
1778 | ||
1779 | output_file_create (out_file_name); | |
1780 | ||
1781 | obj_header_append (&next_object_file_charP, &headers); | |
1782 | ||
efaf0ba4 NC |
1783 | know ((next_object_file_charP - the_object_file) |
1784 | == H_GET_HEADER_SIZE (&headers)); | |
252b5132 | 1785 | |
efaf0ba4 | 1786 | /* Emit code. */ |
252b5132 RH |
1787 | for (fragP = text_frag_root; fragP; fragP = fragP->fr_next) |
1788 | { | |
1789 | register long count; | |
1790 | register char *fill_literal; | |
1791 | register long fill_size; | |
1792 | ||
1793 | PROGRESS (1); | |
1794 | know (fragP->fr_type == rs_fill); | |
efaf0ba4 NC |
1795 | append (&next_object_file_charP, fragP->fr_literal, |
1796 | (unsigned long) fragP->fr_fix); | |
252b5132 RH |
1797 | fill_literal = fragP->fr_literal + fragP->fr_fix; |
1798 | fill_size = fragP->fr_var; | |
1799 | know (fragP->fr_offset >= 0); | |
1800 | ||
1801 | for (count = fragP->fr_offset; count; count--) | |
efaf0ba4 NC |
1802 | append (&next_object_file_charP, fill_literal, |
1803 | (unsigned long) fill_size); | |
1804 | } | |
252b5132 | 1805 | |
efaf0ba4 NC |
1806 | know ((next_object_file_charP - the_object_file) |
1807 | == (H_GET_HEADER_SIZE (&headers) | |
1808 | + H_GET_TEXT_SIZE (&headers) | |
1809 | + H_GET_DATA_SIZE (&headers))); | |
1810 | ||
1811 | /* Emit relocations. */ | |
1812 | obj_emit_relocations (&next_object_file_charP, text_fix_root, | |
1813 | (relax_addressT) 0); | |
1814 | know ((next_object_file_charP - the_object_file) | |
1815 | == (H_GET_HEADER_SIZE (&headers) | |
1816 | + H_GET_TEXT_SIZE (&headers) | |
1817 | + H_GET_DATA_SIZE (&headers) | |
1818 | + H_GET_TEXT_RELOCATION_SIZE (&headers))); | |
252b5132 RH |
1819 | #ifdef TC_I960 |
1820 | /* Make addresses in data relocation directives relative to beginning of | |
efaf0ba4 NC |
1821 | first data fragment, not end of last text fragment: alignment of the |
1822 | start of the data segment may place a gap between the segments. */ | |
1823 | obj_emit_relocations (&next_object_file_charP, data_fix_root, | |
1824 | data0_frchainP->frch_root->fr_address); | |
1825 | #else /* TC_I960 */ | |
1826 | obj_emit_relocations (&next_object_file_charP, data_fix_root, | |
1827 | text_last_frag->fr_address); | |
1828 | #endif /* TC_I960 */ | |
1829 | ||
1830 | know ((next_object_file_charP - the_object_file) | |
1831 | == (H_GET_HEADER_SIZE (&headers) | |
1832 | + H_GET_TEXT_SIZE (&headers) | |
1833 | + H_GET_DATA_SIZE (&headers) | |
1834 | + H_GET_TEXT_RELOCATION_SIZE (&headers) | |
1835 | + H_GET_DATA_RELOCATION_SIZE (&headers))); | |
1836 | ||
1837 | /* Emit line number entries. */ | |
252b5132 | 1838 | OBJ_EMIT_LINENO (&next_object_file_charP, lineno_rootP, the_object_file); |
efaf0ba4 NC |
1839 | know ((next_object_file_charP - the_object_file) |
1840 | == (H_GET_HEADER_SIZE (&headers) | |
1841 | + H_GET_TEXT_SIZE (&headers) | |
1842 | + H_GET_DATA_SIZE (&headers) | |
1843 | + H_GET_TEXT_RELOCATION_SIZE (&headers) | |
1844 | + H_GET_DATA_RELOCATION_SIZE (&headers) | |
1845 | + H_GET_LINENO_SIZE (&headers))); | |
1846 | ||
1847 | /* Emit symbols. */ | |
252b5132 | 1848 | obj_emit_symbols (&next_object_file_charP, symbol_rootP); |
efaf0ba4 NC |
1849 | know ((next_object_file_charP - the_object_file) |
1850 | == (H_GET_HEADER_SIZE (&headers) | |
1851 | + H_GET_TEXT_SIZE (&headers) | |
1852 | + H_GET_DATA_SIZE (&headers) | |
1853 | + H_GET_TEXT_RELOCATION_SIZE (&headers) | |
1854 | + H_GET_DATA_RELOCATION_SIZE (&headers) | |
1855 | + H_GET_LINENO_SIZE (&headers) | |
1856 | + H_GET_SYMBOL_TABLE_SIZE (&headers))); | |
1857 | ||
1858 | /* Emit strings. */ | |
252b5132 | 1859 | if (string_byte_count > 0) |
efaf0ba4 | 1860 | obj_emit_strings (&next_object_file_charP); |
252b5132 RH |
1861 | |
1862 | #ifdef BFD_HEADERS | |
0e1a166b AM |
1863 | bfd_seek (stdoutput, (file_ptr) 0, 0); |
1864 | bfd_bwrite (the_object_file, (bfd_size_type) object_file_size, stdoutput); | |
252b5132 RH |
1865 | #else |
1866 | ||
efaf0ba4 | 1867 | /* Write the data to the file. */ |
252b5132 RH |
1868 | output_file_append (the_object_file, object_file_size, out_file_name); |
1869 | free (the_object_file); | |
1870 | #endif | |
efaf0ba4 NC |
1871 | } |
1872 | #else /* OBJ_VMS */ | |
1873 | /* Now do the VMS-dependent part of writing the object file. */ | |
252b5132 RH |
1874 | vms_write_object_file (H_GET_TEXT_SIZE (&headers), |
1875 | H_GET_DATA_SIZE (&headers), | |
1876 | H_GET_BSS_SIZE (&headers), | |
1877 | text_frag_root, data_frag_root); | |
efaf0ba4 NC |
1878 | #endif /* OBJ_VMS */ |
1879 | #else /* BFD_ASSEMBLER */ | |
252b5132 RH |
1880 | |
1881 | /* Resolve symbol values. This needs to be done before processing | |
1882 | the relocations. */ | |
1883 | if (symbol_rootP) | |
1884 | { | |
1885 | symbolS *symp; | |
1886 | ||
1887 | for (symp = symbol_rootP; symp; symp = symbol_next (symp)) | |
6386f3a7 | 1888 | resolve_symbol_value (symp); |
252b5132 | 1889 | } |
49309057 | 1890 | resolve_local_symbol_values (); |
252b5132 RH |
1891 | |
1892 | PROGRESS (1); | |
1893 | ||
1894 | #ifdef tc_frob_file_before_adjust | |
1895 | tc_frob_file_before_adjust (); | |
1896 | #endif | |
1897 | #ifdef obj_frob_file_before_adjust | |
1898 | obj_frob_file_before_adjust (); | |
1899 | #endif | |
1900 | ||
efaf0ba4 | 1901 | bfd_map_over_sections (stdoutput, adjust_reloc_syms, (char *) 0); |
252b5132 | 1902 | |
a161fe53 AM |
1903 | #ifdef tc_frob_file_before_fix |
1904 | tc_frob_file_before_fix (); | |
1905 | #endif | |
1906 | #ifdef obj_frob_file_before_fix | |
1907 | obj_frob_file_before_fix (); | |
1908 | #endif | |
1909 | ||
1910 | bfd_map_over_sections (stdoutput, fix_segment, (char *) 0); | |
1911 | ||
252b5132 RH |
1912 | /* Set up symbol table, and write it out. */ |
1913 | if (symbol_rootP) | |
1914 | { | |
1915 | symbolS *symp; | |
1916 | ||
1917 | for (symp = symbol_rootP; symp; symp = symbol_next (symp)) | |
1918 | { | |
1919 | int punt = 0; | |
1920 | const char *name; | |
1921 | ||
49309057 | 1922 | if (symbol_mri_common_p (symp)) |
252b5132 RH |
1923 | { |
1924 | if (S_IS_EXTERNAL (symp)) | |
1925 | as_bad (_("%s: global symbols not supported in common sections"), | |
1926 | S_GET_NAME (symp)); | |
1927 | symbol_remove (symp, &symbol_rootP, &symbol_lastP); | |
1928 | continue; | |
1929 | } | |
1930 | ||
1931 | name = S_GET_NAME (symp); | |
1932 | if (name) | |
1933 | { | |
efaf0ba4 NC |
1934 | const char *name2 = |
1935 | decode_local_label_name ((char *) S_GET_NAME (symp)); | |
252b5132 RH |
1936 | /* They only differ if `name' is a fb or dollar local |
1937 | label name. */ | |
1938 | if (name2 != name && ! S_IS_DEFINED (symp)) | |
0e389e77 | 1939 | as_bad (_("local label `%s' is not defined"), name2); |
252b5132 RH |
1940 | } |
1941 | ||
1942 | /* Do it again, because adjust_reloc_syms might introduce | |
1943 | more symbols. They'll probably only be section symbols, | |
1944 | but they'll still need to have the values computed. */ | |
6386f3a7 | 1945 | resolve_symbol_value (symp); |
252b5132 RH |
1946 | |
1947 | /* Skip symbols which were equated to undefined or common | |
1948 | symbols. */ | |
e0890092 | 1949 | if (symbol_equated_reloc_p (symp)) |
252b5132 RH |
1950 | { |
1951 | symbol_remove (symp, &symbol_rootP, &symbol_lastP); | |
1952 | continue; | |
1953 | } | |
1954 | ||
1955 | /* So far, common symbols have been treated like undefined symbols. | |
1956 | Put them in the common section now. */ | |
1957 | if (S_IS_DEFINED (symp) == 0 | |
1958 | && S_GET_VALUE (symp) != 0) | |
1959 | S_SET_SEGMENT (symp, bfd_com_section_ptr); | |
1960 | #if 0 | |
1961 | printf ("symbol `%s'\n\t@%x: value=%d flags=%x seg=%s\n", | |
1962 | S_GET_NAME (symp), symp, | |
1963 | S_GET_VALUE (symp), | |
49309057 ILT |
1964 | symbol_get_bfdsym (symp)->flags, |
1965 | segment_name (S_GET_SEGMENT (symp))); | |
252b5132 RH |
1966 | #endif |
1967 | ||
1968 | #ifdef obj_frob_symbol | |
1969 | obj_frob_symbol (symp, punt); | |
1970 | #endif | |
1971 | #ifdef tc_frob_symbol | |
49309057 | 1972 | if (! punt || symbol_used_in_reloc_p (symp)) |
252b5132 RH |
1973 | tc_frob_symbol (symp, punt); |
1974 | #endif | |
1975 | ||
1976 | /* If we don't want to keep this symbol, splice it out of | |
1977 | the chain now. If EMIT_SECTION_SYMBOLS is 0, we never | |
1978 | want section symbols. Otherwise, we skip local symbols | |
1979 | and symbols that the frob_symbol macros told us to punt, | |
1980 | but we keep such symbols if they are used in relocs. */ | |
a161fe53 AM |
1981 | if (symp == abs_section_sym |
1982 | || (! EMIT_SECTION_SYMBOLS | |
1983 | && symbol_section_p (symp)) | |
252b5132 RH |
1984 | /* Note that S_IS_EXTERN and S_IS_LOCAL are not always |
1985 | opposites. Sometimes the former checks flags and the | |
1986 | latter examines the name... */ | |
1987 | || (!S_IS_EXTERN (symp) | |
a161fe53 | 1988 | && (punt || S_IS_LOCAL (symp)) |
49309057 | 1989 | && ! symbol_used_in_reloc_p (symp))) |
252b5132 RH |
1990 | { |
1991 | symbol_remove (symp, &symbol_rootP, &symbol_lastP); | |
efaf0ba4 | 1992 | |
252b5132 RH |
1993 | /* After symbol_remove, symbol_next(symp) still returns |
1994 | the one that came after it in the chain. So we don't | |
1995 | need to do any extra cleanup work here. */ | |
252b5132 RH |
1996 | continue; |
1997 | } | |
1998 | ||
1999 | /* Make sure we really got a value for the symbol. */ | |
49309057 | 2000 | if (! symbol_resolved_p (symp)) |
252b5132 | 2001 | { |
0e389e77 | 2002 | as_bad (_("can't resolve value for symbol `%s'"), |
252b5132 | 2003 | S_GET_NAME (symp)); |
49309057 | 2004 | symbol_mark_resolved (symp); |
252b5132 RH |
2005 | } |
2006 | ||
2007 | /* Set the value into the BFD symbol. Up til now the value | |
2008 | has only been kept in the gas symbolS struct. */ | |
49309057 | 2009 | symbol_get_bfdsym (symp)->value = S_GET_VALUE (symp); |
252b5132 RH |
2010 | } |
2011 | } | |
2012 | ||
2013 | PROGRESS (1); | |
2014 | ||
2015 | /* Now do any format-specific adjustments to the symbol table, such | |
2016 | as adding file symbols. */ | |
2017 | #ifdef tc_adjust_symtab | |
2018 | tc_adjust_symtab (); | |
2019 | #endif | |
2020 | #ifdef obj_adjust_symtab | |
2021 | obj_adjust_symtab (); | |
2022 | #endif | |
2023 | ||
2024 | /* Now that all the sizes are known, and contents correct, we can | |
2025 | start writing to the file. */ | |
2026 | set_symtab (); | |
2027 | ||
2028 | /* If *_frob_file changes the symbol value at this point, it is | |
2029 | responsible for moving the changed value into symp->bsym->value | |
2030 | as well. Hopefully all symbol value changing can be done in | |
2031 | *_frob_symbol. */ | |
2032 | #ifdef tc_frob_file | |
2033 | tc_frob_file (); | |
2034 | #endif | |
2035 | #ifdef obj_frob_file | |
2036 | obj_frob_file (); | |
2037 | #endif | |
2038 | ||
2039 | bfd_map_over_sections (stdoutput, write_relocs, (char *) 0); | |
2040 | ||
2041 | #ifdef tc_frob_file_after_relocs | |
2042 | tc_frob_file_after_relocs (); | |
2043 | #endif | |
2044 | #ifdef obj_frob_file_after_relocs | |
2045 | obj_frob_file_after_relocs (); | |
2046 | #endif | |
2047 | ||
2048 | bfd_map_over_sections (stdoutput, write_contents, (char *) 0); | |
efaf0ba4 | 2049 | #endif /* BFD_ASSEMBLER */ |
252b5132 | 2050 | } |
efaf0ba4 | 2051 | #endif /* ! BFD */ |
252b5132 RH |
2052 | |
2053 | #ifdef TC_GENERIC_RELAX_TABLE | |
2054 | ||
252b5132 RH |
2055 | /* Relax a fragment by scanning TC_GENERIC_RELAX_TABLE. */ |
2056 | ||
2057 | long | |
c842b53a ILT |
2058 | relax_frag (segment, fragP, stretch) |
2059 | segT segment; | |
252b5132 RH |
2060 | fragS *fragP; |
2061 | long stretch; | |
2062 | { | |
2063 | const relax_typeS *this_type; | |
2064 | const relax_typeS *start_type; | |
2065 | relax_substateT next_state; | |
2066 | relax_substateT this_state; | |
38686296 AM |
2067 | long growth; |
2068 | offsetT aim; | |
2069 | addressT target; | |
2070 | addressT address; | |
2071 | symbolS *symbolP; | |
2072 | const relax_typeS *table; | |
2073 | ||
2074 | target = fragP->fr_offset; | |
2075 | address = fragP->fr_address; | |
2076 | table = TC_GENERIC_RELAX_TABLE; | |
252b5132 RH |
2077 | this_state = fragP->fr_subtype; |
2078 | start_type = this_type = table + this_state; | |
38686296 | 2079 | symbolP = fragP->fr_symbol; |
252b5132 RH |
2080 | |
2081 | if (symbolP) | |
2082 | { | |
c842b53a ILT |
2083 | fragS *sym_frag; |
2084 | ||
2085 | sym_frag = symbol_get_frag (symbolP); | |
2086 | ||
252b5132 RH |
2087 | #ifndef DIFF_EXPR_OK |
2088 | #if !defined (MANY_SEGMENTS) && !defined (BFD_ASSEMBLER) | |
2089 | know ((S_GET_SEGMENT (symbolP) == SEG_ABSOLUTE) | |
2090 | || (S_GET_SEGMENT (symbolP) == SEG_DATA) | |
2091 | || (S_GET_SEGMENT (symbolP) == SEG_BSS) | |
2092 | || (S_GET_SEGMENT (symbolP) == SEG_TEXT)); | |
2093 | #endif | |
c842b53a | 2094 | know (sym_frag != NULL); |
252b5132 | 2095 | #endif |
a161fe53 | 2096 | know (S_GET_SEGMENT (symbolP) != absolute_section |
c842b53a | 2097 | || sym_frag == &zero_address_frag); |
ac62c346 | 2098 | target += S_GET_VALUE (symbolP); |
252b5132 RH |
2099 | |
2100 | /* If frag has yet to be reached on this pass, | |
2101 | assume it will move by STRETCH just as we did. | |
2102 | If this is not so, it will be because some frag | |
38686296 | 2103 | between grows, and that will force another pass. */ |
252b5132 | 2104 | |
c842b53a | 2105 | if (stretch != 0 |
38686296 AM |
2106 | && sym_frag->relax_marker != fragP->relax_marker |
2107 | && S_GET_SEGMENT (symbolP) == segment) | |
252b5132 RH |
2108 | { |
2109 | target += stretch; | |
2110 | } | |
2111 | } | |
2112 | ||
2113 | aim = target - address - fragP->fr_fix; | |
2114 | #ifdef TC_PCREL_ADJUST | |
efaf0ba4 NC |
2115 | /* Currently only the ns32k family needs this. */ |
2116 | aim += TC_PCREL_ADJUST (fragP); | |
2117 | /* #else */ | |
252b5132 RH |
2118 | /* This machine doesn't want to use pcrel_adjust. |
2119 | In that case, pcrel_adjust should be zero. */ | |
efaf0ba4 NC |
2120 | #if 0 |
2121 | assert (fragP->fr_targ.ns32k.pcrel_adjust == 0); | |
252b5132 | 2122 | #endif |
efaf0ba4 NC |
2123 | #endif |
2124 | #ifdef md_prepare_relax_scan /* formerly called M68K_AIM_KLUDGE */ | |
252b5132 RH |
2125 | md_prepare_relax_scan (fragP, address, aim, this_state, this_type); |
2126 | #endif | |
2127 | ||
2128 | if (aim < 0) | |
2129 | { | |
efaf0ba4 | 2130 | /* Look backwards. */ |
252b5132 RH |
2131 | for (next_state = this_type->rlx_more; next_state;) |
2132 | if (aim >= this_type->rlx_backward) | |
2133 | next_state = 0; | |
2134 | else | |
2135 | { | |
efaf0ba4 | 2136 | /* Grow to next state. */ |
252b5132 RH |
2137 | this_state = next_state; |
2138 | this_type = table + this_state; | |
2139 | next_state = this_type->rlx_more; | |
2140 | } | |
2141 | } | |
2142 | else | |
2143 | { | |
efaf0ba4 | 2144 | /* Look forwards. */ |
252b5132 RH |
2145 | for (next_state = this_type->rlx_more; next_state;) |
2146 | if (aim <= this_type->rlx_forward) | |
2147 | next_state = 0; | |
2148 | else | |
2149 | { | |
efaf0ba4 | 2150 | /* Grow to next state. */ |
252b5132 RH |
2151 | this_state = next_state; |
2152 | this_type = table + this_state; | |
2153 | next_state = this_type->rlx_more; | |
2154 | } | |
2155 | } | |
2156 | ||
2157 | growth = this_type->rlx_length - start_type->rlx_length; | |
2158 | if (growth != 0) | |
2159 | fragP->fr_subtype = this_state; | |
2160 | return growth; | |
2161 | } | |
2162 | ||
efaf0ba4 | 2163 | #endif /* defined (TC_GENERIC_RELAX_TABLE) */ |
252b5132 RH |
2164 | |
2165 | /* Relax_align. Advance location counter to next address that has 'alignment' | |
2166 | lowest order bits all 0s, return size of adjustment made. */ | |
2167 | static relax_addressT | |
2168 | relax_align (address, alignment) | |
efaf0ba4 NC |
2169 | register relax_addressT address; /* Address now. */ |
2170 | register int alignment; /* Alignment (binary). */ | |
252b5132 RH |
2171 | { |
2172 | relax_addressT mask; | |
2173 | relax_addressT new_address; | |
2174 | ||
2175 | mask = ~((~0) << alignment); | |
2176 | new_address = (address + mask) & (~mask); | |
2177 | #ifdef LINKER_RELAXING_SHRINKS_ONLY | |
2178 | if (linkrelax) | |
2179 | /* We must provide lots of padding, so the linker can discard it | |
2180 | when needed. The linker will not add extra space, ever. */ | |
2181 | new_address += (1 << alignment); | |
2182 | #endif | |
2183 | return (new_address - address); | |
2184 | } | |
2185 | ||
efaf0ba4 NC |
2186 | /* Now we have a segment, not a crowd of sub-segments, we can make |
2187 | fr_address values. | |
58a77e41 | 2188 | |
efaf0ba4 | 2189 | Relax the frags. |
58a77e41 | 2190 | |
efaf0ba4 NC |
2191 | After this, all frags in this segment have addresses that are correct |
2192 | within the segment. Since segments live in different file addresses, | |
2193 | these frag addresses may not be the same as final object-file | |
2194 | addresses. */ | |
2195 | ||
e46d99eb | 2196 | int |
252b5132 RH |
2197 | relax_segment (segment_frag_root, segment) |
2198 | struct frag *segment_frag_root; | |
2199 | segT segment; | |
2200 | { | |
2201 | register struct frag *fragP; | |
2202 | register relax_addressT address; | |
e46d99eb AM |
2203 | int ret; |
2204 | ||
252b5132 RH |
2205 | #if !defined (MANY_SEGMENTS) && !defined (BFD_ASSEMBLER) |
2206 | know (segment == SEG_DATA || segment == SEG_TEXT || segment == SEG_BSS); | |
2207 | #endif | |
efaf0ba4 | 2208 | /* In case md_estimate_size_before_relax() wants to make fixSs. */ |
252b5132 RH |
2209 | subseg_change (segment, 0); |
2210 | ||
2211 | /* For each frag in segment: count and store (a 1st guess of) | |
2212 | fr_address. */ | |
2213 | address = 0; | |
2214 | for (fragP = segment_frag_root; fragP; fragP = fragP->fr_next) | |
2215 | { | |
38686296 | 2216 | fragP->relax_marker = 0; |
252b5132 RH |
2217 | fragP->fr_address = address; |
2218 | address += fragP->fr_fix; | |
2219 | ||
2220 | switch (fragP->fr_type) | |
2221 | { | |
2222 | case rs_fill: | |
2223 | address += fragP->fr_offset * fragP->fr_var; | |
2224 | break; | |
2225 | ||
2226 | case rs_align: | |
2227 | case rs_align_code: | |
0a9ef439 | 2228 | case rs_align_test: |
252b5132 RH |
2229 | { |
2230 | addressT offset = relax_align (address, (int) fragP->fr_offset); | |
2231 | ||
2232 | if (fragP->fr_subtype != 0 && offset > fragP->fr_subtype) | |
2233 | offset = 0; | |
2234 | ||
2235 | if (offset % fragP->fr_var != 0) | |
2236 | { | |
54d3cad9 AM |
2237 | as_bad_where (fragP->fr_file, fragP->fr_line, |
2238 | _("alignment padding (%lu bytes) not a multiple of %ld"), | |
2239 | (unsigned long) offset, (long) fragP->fr_var); | |
252b5132 RH |
2240 | offset -= (offset % fragP->fr_var); |
2241 | } | |
2242 | ||
2243 | address += offset; | |
2244 | } | |
2245 | break; | |
2246 | ||
2247 | case rs_org: | |
2248 | case rs_space: | |
2249 | /* Assume .org is nugatory. It will grow with 1st relax. */ | |
2250 | break; | |
2251 | ||
2252 | case rs_machine_dependent: | |
e0890092 AM |
2253 | /* If fr_symbol is an expression, this call to |
2254 | resolve_symbol_value sets up the correct segment, which will | |
2255 | likely be needed in md_estimate_size_before_relax. */ | |
2256 | if (fragP->fr_symbol) | |
2257 | resolve_symbol_value (fragP->fr_symbol); | |
2258 | ||
252b5132 RH |
2259 | address += md_estimate_size_before_relax (fragP, segment); |
2260 | break; | |
2261 | ||
2262 | #ifndef WORKING_DOT_WORD | |
efaf0ba4 | 2263 | /* Broken words don't concern us yet. */ |
252b5132 RH |
2264 | case rs_broken_word: |
2265 | break; | |
2266 | #endif | |
2267 | ||
2268 | case rs_leb128: | |
efaf0ba4 | 2269 | /* Initial guess is always 1; doing otherwise can result in |
252b5132 RH |
2270 | stable solutions that are larger than the minimum. */ |
2271 | address += fragP->fr_offset = 1; | |
2272 | break; | |
2273 | ||
2274 | case rs_cfa: | |
2275 | address += eh_frame_estimate_size_before_relax (fragP); | |
2276 | break; | |
2277 | ||
220e750f RH |
2278 | case rs_dwarf2dbg: |
2279 | address += dwarf2dbg_estimate_size_before_relax (fragP); | |
2280 | break; | |
2281 | ||
252b5132 RH |
2282 | default: |
2283 | BAD_CASE (fragP->fr_type); | |
2284 | break; | |
efaf0ba4 NC |
2285 | } |
2286 | } | |
252b5132 RH |
2287 | |
2288 | /* Do relax(). */ | |
2289 | { | |
efaf0ba4 NC |
2290 | long stretch; /* May be any size, 0 or negative. */ |
2291 | /* Cumulative number of addresses we have relaxed this pass. | |
2292 | We may have relaxed more than one address. */ | |
e46d99eb | 2293 | int stretched; /* Have we stretched on this pass? */ |
252b5132 RH |
2294 | /* This is 'cuz stretch may be zero, when, in fact some piece of code |
2295 | grew, and another shrank. If a branch instruction doesn't fit anymore, | |
2296 | we could be scrod. */ | |
2297 | ||
2298 | do | |
2299 | { | |
e46d99eb AM |
2300 | stretch = 0; |
2301 | stretched = 0; | |
58a77e41 | 2302 | |
252b5132 RH |
2303 | for (fragP = segment_frag_root; fragP; fragP = fragP->fr_next) |
2304 | { | |
2305 | long growth = 0; | |
2306 | addressT was_address; | |
2307 | offsetT offset; | |
2308 | symbolS *symbolP; | |
2309 | ||
38686296 | 2310 | fragP->relax_marker ^= 1; |
252b5132 RH |
2311 | was_address = fragP->fr_address; |
2312 | address = fragP->fr_address += stretch; | |
2313 | symbolP = fragP->fr_symbol; | |
2314 | offset = fragP->fr_offset; | |
2315 | ||
2316 | switch (fragP->fr_type) | |
2317 | { | |
efaf0ba4 | 2318 | case rs_fill: /* .fill never relaxes. */ |
252b5132 RH |
2319 | growth = 0; |
2320 | break; | |
2321 | ||
2322 | #ifndef WORKING_DOT_WORD | |
2323 | /* JF: This is RMS's idea. I do *NOT* want to be blamed | |
2324 | for it I do not want to write it. I do not want to have | |
2325 | anything to do with it. This is not the proper way to | |
2326 | implement this misfeature. */ | |
2327 | case rs_broken_word: | |
2328 | { | |
2329 | struct broken_word *lie; | |
2330 | struct broken_word *untruth; | |
2331 | ||
2332 | /* Yes this is ugly (storing the broken_word pointer | |
2333 | in the symbol slot). Still, this whole chunk of | |
2334 | code is ugly, and I don't feel like doing anything | |
2335 | about it. Think of it as stubbornness in action. */ | |
2336 | growth = 0; | |
2337 | for (lie = (struct broken_word *) (fragP->fr_symbol); | |
2338 | lie && lie->dispfrag == fragP; | |
2339 | lie = lie->next_broken_word) | |
2340 | { | |
2341 | ||
2342 | if (lie->added) | |
2343 | continue; | |
2344 | ||
ac62c346 | 2345 | offset = (S_GET_VALUE (lie->add) |
252b5132 | 2346 | + lie->addnum |
ac62c346 | 2347 | - S_GET_VALUE (lie->sub)); |
252b5132 RH |
2348 | if (offset <= -32768 || offset >= 32767) |
2349 | { | |
2350 | if (flag_warn_displacement) | |
2351 | { | |
2352 | char buf[50]; | |
2353 | sprint_value (buf, (addressT) lie->addnum); | |
54d3cad9 AM |
2354 | as_warn_where (fragP->fr_file, fragP->fr_line, |
2355 | _(".word %s-%s+%s didn't fit"), | |
2356 | S_GET_NAME (lie->add), | |
2357 | S_GET_NAME (lie->sub), | |
2358 | buf); | |
252b5132 RH |
2359 | } |
2360 | lie->added = 1; | |
2361 | if (fragP->fr_subtype == 0) | |
2362 | { | |
2363 | fragP->fr_subtype++; | |
2364 | growth += md_short_jump_size; | |
2365 | } | |
2366 | for (untruth = lie->next_broken_word; | |
2367 | untruth && untruth->dispfrag == lie->dispfrag; | |
2368 | untruth = untruth->next_broken_word) | |
49309057 ILT |
2369 | if ((symbol_get_frag (untruth->add) |
2370 | == symbol_get_frag (lie->add)) | |
2371 | && (S_GET_VALUE (untruth->add) | |
2372 | == S_GET_VALUE (lie->add))) | |
252b5132 RH |
2373 | { |
2374 | untruth->added = 2; | |
2375 | untruth->use_jump = lie; | |
2376 | } | |
2377 | growth += md_long_jump_size; | |
2378 | } | |
2379 | } | |
2380 | ||
2381 | break; | |
efaf0ba4 | 2382 | } /* case rs_broken_word */ |
252b5132 RH |
2383 | #endif |
2384 | case rs_align: | |
2385 | case rs_align_code: | |
0a9ef439 | 2386 | case rs_align_test: |
252b5132 RH |
2387 | { |
2388 | addressT oldoff, newoff; | |
2389 | ||
2390 | oldoff = relax_align (was_address + fragP->fr_fix, | |
2391 | (int) offset); | |
2392 | newoff = relax_align (address + fragP->fr_fix, | |
2393 | (int) offset); | |
2394 | ||
2395 | if (fragP->fr_subtype != 0) | |
2396 | { | |
2397 | if (oldoff > fragP->fr_subtype) | |
2398 | oldoff = 0; | |
2399 | if (newoff > fragP->fr_subtype) | |
2400 | newoff = 0; | |
2401 | } | |
2402 | ||
2403 | growth = newoff - oldoff; | |
2404 | } | |
2405 | break; | |
2406 | ||
2407 | case rs_org: | |
2408 | { | |
e46d99eb AM |
2409 | addressT target = offset; |
2410 | addressT after; | |
252b5132 RH |
2411 | |
2412 | if (symbolP) | |
2413 | { | |
2414 | #if !defined (MANY_SEGMENTS) && !defined (BFD_ASSEMBLER) | |
2415 | know ((S_GET_SEGMENT (symbolP) == SEG_ABSOLUTE) | |
2416 | || (S_GET_SEGMENT (symbolP) == SEG_DATA) | |
2417 | || (S_GET_SEGMENT (symbolP) == SEG_TEXT) | |
2418 | || S_GET_SEGMENT (symbolP) == SEG_BSS); | |
2419 | know (symbolP->sy_frag); | |
2420 | know (!(S_GET_SEGMENT (symbolP) == SEG_ABSOLUTE) | |
2421 | || (symbolP->sy_frag == &zero_address_frag)); | |
2422 | #endif | |
6e917903 TW |
2423 | /* Convert from an actual address to an octet offset |
2424 | into the section. Here it is assumed that the | |
2425 | section's VMA is zero, and can omit subtracting it | |
2426 | from the symbol's value to get the address offset. */ | |
2427 | know (S_GET_SECTION (symbolP)->vma == 0); | |
2428 | target += S_GET_VALUE (symbolP) * OCTETS_PER_BYTE; | |
ac62c346 | 2429 | } |
252b5132 RH |
2430 | |
2431 | know (fragP->fr_next); | |
2432 | after = fragP->fr_next->fr_address; | |
2433 | growth = target - after; | |
2434 | if (growth < 0) | |
2435 | { | |
2436 | /* Growth may be negative, but variable part of frag | |
2437 | cannot have fewer than 0 chars. That is, we can't | |
efaf0ba4 | 2438 | .org backwards. */ |
14ad458a | 2439 | as_bad_where (fragP->fr_file, fragP->fr_line, |
0e389e77 | 2440 | _("attempt to .org backwards")); |
14ad458a ILT |
2441 | |
2442 | /* We've issued an error message. Change the | |
2443 | frag to avoid cascading errors. */ | |
2444 | fragP->fr_type = rs_align; | |
2445 | fragP->fr_subtype = 0; | |
2446 | fragP->fr_offset = 0; | |
2447 | fragP->fr_fix = after - address; | |
2448 | growth = stretch; | |
252b5132 RH |
2449 | } |
2450 | ||
efaf0ba4 NC |
2451 | /* This is an absolute growth factor */ |
2452 | growth -= stretch; | |
252b5132 RH |
2453 | break; |
2454 | } | |
2455 | ||
2456 | case rs_space: | |
54d3cad9 | 2457 | growth = 0; |
252b5132 RH |
2458 | if (symbolP) |
2459 | { | |
766c03c9 AM |
2460 | offsetT amount; |
2461 | ||
2462 | amount = S_GET_VALUE (symbolP); | |
9e40345d | 2463 | if (S_GET_SEGMENT (symbolP) != absolute_section |
252b5132 RH |
2464 | || S_IS_COMMON (symbolP) |
2465 | || ! S_IS_DEFINED (symbolP)) | |
252b5132 | 2466 | { |
54d3cad9 AM |
2467 | as_bad_where (fragP->fr_file, fragP->fr_line, |
2468 | _(".space specifies non-absolute value")); | |
2469 | /* Prevent repeat of this error message. */ | |
2470 | fragP->fr_symbol = 0; | |
2471 | } | |
2472 | else if (amount < 0) | |
2473 | { | |
2474 | as_warn_where (fragP->fr_file, fragP->fr_line, | |
2475 | _(".space or .fill with negative value, ignored")); | |
766c03c9 | 2476 | fragP->fr_symbol = 0; |
252b5132 | 2477 | } |
54d3cad9 | 2478 | else |
050be34e | 2479 | growth = (was_address + fragP->fr_fix + amount |
54d3cad9 | 2480 | - fragP->fr_next->fr_address); |
252b5132 | 2481 | } |
252b5132 RH |
2482 | break; |
2483 | ||
2484 | case rs_machine_dependent: | |
2485 | #ifdef md_relax_frag | |
c842b53a | 2486 | growth = md_relax_frag (segment, fragP, stretch); |
252b5132 RH |
2487 | #else |
2488 | #ifdef TC_GENERIC_RELAX_TABLE | |
2489 | /* The default way to relax a frag is to look through | |
2490 | TC_GENERIC_RELAX_TABLE. */ | |
c842b53a | 2491 | growth = relax_frag (segment, fragP, stretch); |
efaf0ba4 | 2492 | #endif /* TC_GENERIC_RELAX_TABLE */ |
252b5132 RH |
2493 | #endif |
2494 | break; | |
2495 | ||
2496 | case rs_leb128: | |
2497 | { | |
2498 | valueT value; | |
2499 | int size; | |
2500 | ||
6386f3a7 | 2501 | value = resolve_symbol_value (fragP->fr_symbol); |
252b5132 RH |
2502 | size = sizeof_leb128 (value, fragP->fr_subtype); |
2503 | growth = size - fragP->fr_offset; | |
2504 | fragP->fr_offset = size; | |
2505 | } | |
2506 | break; | |
2507 | ||
2508 | case rs_cfa: | |
2509 | growth = eh_frame_relax_frag (fragP); | |
2510 | break; | |
2511 | ||
220e750f RH |
2512 | case rs_dwarf2dbg: |
2513 | growth = dwarf2dbg_relax_frag (fragP); | |
2514 | break; | |
2515 | ||
252b5132 RH |
2516 | default: |
2517 | BAD_CASE (fragP->fr_type); | |
2518 | break; | |
2519 | } | |
2520 | if (growth) | |
2521 | { | |
2522 | stretch += growth; | |
e46d99eb | 2523 | stretched = 1; |
252b5132 | 2524 | } |
efaf0ba4 | 2525 | } /* For each frag in the segment. */ |
252b5132 | 2526 | } |
efaf0ba4 NC |
2527 | while (stretched); /* Until nothing further to relax. */ |
2528 | } /* do_relax */ | |
252b5132 | 2529 | |
e46d99eb AM |
2530 | ret = 0; |
2531 | for (fragP = segment_frag_root; fragP; fragP = fragP->fr_next) | |
2532 | if (fragP->last_fr_address != fragP->fr_address) | |
2533 | { | |
2534 | fragP->last_fr_address = fragP->fr_address; | |
2535 | ret = 1; | |
2536 | } | |
2537 | return ret; | |
efaf0ba4 | 2538 | } |
252b5132 RH |
2539 | |
2540 | #if defined (BFD_ASSEMBLER) || (!defined (BFD) && !defined (OBJ_VMS)) | |
2541 | ||
252b5132 RH |
2542 | /* fixup_segment() |
2543 | ||
2544 | Go through all the fixS's in a segment and see which ones can be | |
2545 | handled now. (These consist of fixS where we have since discovered | |
2546 | the value of a symbol, or the address of the frag involved.) | |
94f592af | 2547 | For each one, call md_apply_fix3 to put the fix into the frag data. |
252b5132 RH |
2548 | |
2549 | Result is a count of how many relocation structs will be needed to | |
2550 | handle the remaining fixS's that we couldn't completely handle here. | |
2551 | These will be output later by emit_relocations(). */ | |
2552 | ||
2553 | static long | |
df44284e AM |
2554 | fixup_segment (fixP, this_segment) |
2555 | fixS *fixP; | |
2556 | segT this_segment; | |
252b5132 RH |
2557 | { |
2558 | long seg_reloc_count = 0; | |
252b5132 | 2559 | valueT add_number; |
252b5132 RH |
2560 | fragS *fragP; |
2561 | segT add_symbol_segment = absolute_section; | |
2562 | ||
a161fe53 AM |
2563 | if (fixP != NULL && abs_section_sym == NULL) |
2564 | { | |
2565 | #ifndef BFD_ASSEMBLER | |
2566 | abs_section_sym = &abs_symbol; | |
2567 | #else | |
2568 | abs_section_sym = section_symbol (absolute_section); | |
2569 | #endif | |
2570 | } | |
2571 | ||
252b5132 RH |
2572 | /* If the linker is doing the relaxing, we must not do any fixups. |
2573 | ||
df44284e AM |
2574 | Well, strictly speaking that's not true -- we could do any that |
2575 | are PC-relative and don't cross regions that could change size. | |
2576 | And for the i960 we might be able to turn callx/callj into bal | |
2577 | anyways in cases where we know the maximum displacement. */ | |
2578 | if (linkrelax && TC_LINKRELAX_FIXUP (this_segment)) | |
252b5132 RH |
2579 | { |
2580 | for (; fixP; fixP = fixP->fx_next) | |
a161fe53 AM |
2581 | if (!fixP->fx_done) |
2582 | { | |
2583 | if (fixP->fx_addsy == NULL) | |
2584 | { | |
2585 | /* There was no symbol required by this relocation. | |
2586 | However, BFD doesn't really handle relocations | |
2587 | without symbols well. So fake up a local symbol in | |
2588 | the absolute section. */ | |
2589 | fixP->fx_addsy = abs_section_sym; | |
2590 | } | |
2591 | symbol_mark_used_in_reloc (fixP->fx_addsy); | |
2592 | if (fixP->fx_subsy != NULL) | |
2593 | symbol_mark_used_in_reloc (fixP->fx_subsy); | |
2594 | seg_reloc_count++; | |
2595 | } | |
252b5132 RH |
2596 | TC_ADJUST_RELOC_COUNT (fixP, seg_reloc_count); |
2597 | return seg_reloc_count; | |
2598 | } | |
2599 | ||
2600 | for (; fixP; fixP = fixP->fx_next) | |
2601 | { | |
252b5132 RH |
2602 | #ifdef DEBUG5 |
2603 | fprintf (stderr, "\nprocessing fixup:\n"); | |
2604 | print_fixup (fixP); | |
2605 | #endif | |
2606 | ||
252b5132 RH |
2607 | fragP = fixP->fx_frag; |
2608 | know (fragP); | |
252b5132 | 2609 | #ifdef TC_VALIDATE_FIX |
df44284e | 2610 | TC_VALIDATE_FIX (fixP, this_segment, skip); |
252b5132 | 2611 | #endif |
252b5132 | 2612 | add_number = fixP->fx_offset; |
252b5132 | 2613 | |
a161fe53 AM |
2614 | if (fixP->fx_addsy != NULL |
2615 | && symbol_mri_common_p (fixP->fx_addsy)) | |
252b5132 | 2616 | { |
a161fe53 AM |
2617 | know (fixP->fx_addsy->sy_value.X_op == O_symbol); |
2618 | add_number += S_GET_VALUE (fixP->fx_addsy); | |
252b5132 | 2619 | fixP->fx_offset = add_number; |
a161fe53 AM |
2620 | fixP->fx_addsy |
2621 | = symbol_get_value_expression (fixP->fx_addsy)->X_add_symbol; | |
252b5132 RH |
2622 | } |
2623 | ||
a161fe53 AM |
2624 | if (fixP->fx_addsy != NULL) |
2625 | add_symbol_segment = S_GET_SEGMENT (fixP->fx_addsy); | |
252b5132 | 2626 | |
a161fe53 | 2627 | if (fixP->fx_subsy != NULL) |
252b5132 | 2628 | { |
a161fe53 AM |
2629 | segT sub_symbol_segment; |
2630 | resolve_symbol_value (fixP->fx_subsy); | |
2631 | sub_symbol_segment = S_GET_SEGMENT (fixP->fx_subsy); | |
2632 | if (fixP->fx_addsy != NULL | |
2633 | && sub_symbol_segment == add_symbol_segment | |
2634 | && !TC_FORCE_RELOCATION_SUB_SAME (fixP, add_symbol_segment)) | |
252b5132 | 2635 | { |
a161fe53 AM |
2636 | add_number += S_GET_VALUE (fixP->fx_addsy); |
2637 | add_number -= S_GET_VALUE (fixP->fx_subsy); | |
2638 | fixP->fx_offset = add_number; | |
2639 | /* If the back-end code has selected a pc-relative | |
2640 | reloc, adjust the value to be pc-relative. */ | |
1a16aca4 AM |
2641 | if (1 |
2642 | #ifdef TC_M68K | |
2643 | /* See the comment below about 68k weirdness. */ | |
2644 | && 0 | |
2645 | #endif | |
a161fe53 AM |
2646 | && fixP->fx_pcrel) |
2647 | add_number -= MD_PCREL_FROM_SECTION (fixP, this_segment); | |
2648 | fixP->fx_addsy = NULL; | |
2649 | fixP->fx_subsy = NULL; | |
2650 | fixP->fx_pcrel = 0; | |
252b5132 | 2651 | } |
a161fe53 AM |
2652 | else if (sub_symbol_segment == absolute_section |
2653 | && !TC_FORCE_RELOCATION_SUB_ABS (fixP)) | |
252b5132 | 2654 | { |
a161fe53 AM |
2655 | add_number -= S_GET_VALUE (fixP->fx_subsy); |
2656 | fixP->fx_offset = add_number; | |
2657 | fixP->fx_subsy = NULL; | |
2658 | } | |
2659 | else if (sub_symbol_segment == this_segment | |
2660 | && !TC_FORCE_RELOCATION_SUB_LOCAL (fixP)) | |
2661 | { | |
2662 | add_number -= S_GET_VALUE (fixP->fx_subsy); | |
26346241 AM |
2663 | fixP->fx_offset = (add_number + fixP->fx_dot_value |
2664 | + fixP->fx_frag->fr_address); | |
252b5132 | 2665 | |
a161fe53 AM |
2666 | /* Make it pc-relative. If the back-end code has not |
2667 | selected a pc-relative reloc, cancel the adjustment | |
2668 | we do later on all pc-relative relocs. */ | |
2669 | if (0 | |
1a16aca4 | 2670 | #ifdef TC_M68K |
a161fe53 AM |
2671 | /* Do this for m68k even if it's already described |
2672 | as pc-relative. On the m68k, an operand of | |
2673 | "pc@(foo-.-2)" should address "foo" in a | |
2674 | pc-relative mode. */ | |
2675 | || 1 | |
2676 | #endif | |
2677 | || !fixP->fx_pcrel) | |
2678 | add_number += MD_PCREL_FROM_SECTION (fixP, this_segment); | |
2679 | fixP->fx_subsy = NULL; | |
2680 | fixP->fx_pcrel = 1; | |
2681 | } | |
2682 | else if (!TC_VALIDATE_FIX_SUB (fixP)) | |
2683 | { | |
2684 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
2685 | _("can't resolve `%s' {%s section} - `%s' {%s section}"), | |
2686 | fixP->fx_addsy ? S_GET_NAME (fixP->fx_addsy) : "0", | |
2687 | segment_name (add_symbol_segment), | |
2688 | S_GET_NAME (fixP->fx_subsy), | |
2689 | segment_name (sub_symbol_segment)); | |
252b5132 RH |
2690 | } |
2691 | } | |
2692 | ||
a161fe53 | 2693 | if (fixP->fx_addsy) |
252b5132 | 2694 | { |
a161fe53 AM |
2695 | if (add_symbol_segment == this_segment |
2696 | && !TC_FORCE_RELOCATION_LOCAL (fixP)) | |
252b5132 | 2697 | { |
efaf0ba4 NC |
2698 | /* This fixup was made when the symbol's segment was |
2699 | SEG_UNKNOWN, but it is now in the local segment. | |
2700 | So we know how to do the address without relocation. */ | |
a161fe53 AM |
2701 | add_number += S_GET_VALUE (fixP->fx_addsy); |
2702 | fixP->fx_offset = add_number; | |
2703 | if (fixP->fx_pcrel) | |
2704 | add_number -= MD_PCREL_FROM_SECTION (fixP, this_segment); | |
2705 | fixP->fx_addsy = NULL; | |
2706 | fixP->fx_pcrel = 0; | |
252b5132 | 2707 | } |
a161fe53 AM |
2708 | else if (add_symbol_segment == absolute_section |
2709 | && !TC_FORCE_RELOCATION_ABS (fixP)) | |
252b5132 | 2710 | { |
a161fe53 AM |
2711 | add_number += S_GET_VALUE (fixP->fx_addsy); |
2712 | fixP->fx_offset = add_number; | |
2713 | fixP->fx_addsy = NULL; | |
2714 | } | |
2715 | else if (add_symbol_segment != undefined_section | |
252b5132 | 2716 | #ifdef BFD_ASSEMBLER |
a161fe53 | 2717 | && ! bfd_is_com_section (add_symbol_segment) |
252b5132 | 2718 | #endif |
a161fe53 AM |
2719 | && MD_APPLY_SYM_VALUE (fixP)) |
2720 | add_number += S_GET_VALUE (fixP->fx_addsy); | |
252b5132 RH |
2721 | } |
2722 | ||
a161fe53 | 2723 | if (fixP->fx_pcrel) |
252b5132 | 2724 | { |
df44284e | 2725 | add_number -= MD_PCREL_FROM_SECTION (fixP, this_segment); |
a161fe53 | 2726 | if (!fixP->fx_done && fixP->fx_addsy == NULL) |
252b5132 | 2727 | { |
a161fe53 AM |
2728 | /* There was no symbol required by this relocation. |
2729 | However, BFD doesn't really handle relocations | |
2730 | without symbols well. So fake up a local symbol in | |
2731 | the absolute section. */ | |
2732 | fixP->fx_addsy = abs_section_sym; | |
252b5132 RH |
2733 | } |
2734 | } | |
2735 | ||
6d4d30bb | 2736 | if (!fixP->fx_done) |
df44284e | 2737 | md_apply_fix3 (fixP, &add_number, this_segment); |
6d4d30bb | 2738 | |
a161fe53 AM |
2739 | if (!fixP->fx_done) |
2740 | { | |
2741 | ++seg_reloc_count; | |
2742 | if (fixP->fx_addsy == NULL) | |
2743 | fixP->fx_addsy = abs_section_sym; | |
2744 | symbol_mark_used_in_reloc (fixP->fx_addsy); | |
2745 | if (fixP->fx_subsy != NULL) | |
2746 | symbol_mark_used_in_reloc (fixP->fx_subsy); | |
2747 | } | |
2748 | ||
df44284e | 2749 | if (!fixP->fx_bit_fixP && !fixP->fx_no_overflow && fixP->fx_size != 0) |
252b5132 | 2750 | { |
df44284e | 2751 | if (fixP->fx_size < sizeof (valueT)) |
252b5132 | 2752 | { |
b77ad1d4 | 2753 | valueT mask; |
252b5132 | 2754 | |
252b5132 | 2755 | mask = 0; |
efaf0ba4 | 2756 | mask--; /* Set all bits to one. */ |
df44284e | 2757 | mask <<= fixP->fx_size * 8 - (fixP->fx_signed ? 1 : 0); |
b77ad1d4 | 2758 | if ((add_number & mask) != 0 && (add_number & mask) != mask) |
252b5132 RH |
2759 | { |
2760 | char buf[50], buf2[50]; | |
df44284e | 2761 | sprint_value (buf, fragP->fr_address + fixP->fx_where); |
252b5132 RH |
2762 | if (add_number > 1000) |
2763 | sprint_value (buf2, add_number); | |
2764 | else | |
2765 | sprintf (buf2, "%ld", (long) add_number); | |
2766 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
0e389e77 | 2767 | _("value of %s too large for field of %d bytes at %s"), |
df44284e | 2768 | buf2, fixP->fx_size, buf); |
efaf0ba4 | 2769 | } /* Generic error checking. */ |
252b5132 RH |
2770 | } |
2771 | #ifdef WARN_SIGNED_OVERFLOW_WORD | |
2772 | /* Warn if a .word value is too large when treated as a signed | |
2773 | number. We already know it is not too negative. This is to | |
2774 | catch over-large switches generated by gcc on the 68k. */ | |
2775 | if (!flag_signed_overflow_ok | |
df44284e | 2776 | && fixP->fx_size == 2 |
252b5132 RH |
2777 | && add_number > 0x7fff) |
2778 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
0e389e77 | 2779 | _("signed .word overflow; switch may be too large; %ld at 0x%lx"), |
252b5132 | 2780 | (long) add_number, |
df44284e | 2781 | (long) (fragP->fr_address + fixP->fx_where)); |
252b5132 | 2782 | #endif |
efaf0ba4 | 2783 | } /* Not a bit fix. */ |
252b5132 | 2784 | |
252b5132 | 2785 | #ifdef TC_VALIDATE_FIX |
ab9da554 ILT |
2786 | skip: ATTRIBUTE_UNUSED_LABEL |
2787 | ; | |
252b5132 RH |
2788 | #endif |
2789 | #ifdef DEBUG5 | |
2790 | fprintf (stderr, "result:\n"); | |
2791 | print_fixup (fixP); | |
2792 | #endif | |
efaf0ba4 | 2793 | } /* For each fixS in this segment. */ |
252b5132 RH |
2794 | |
2795 | TC_ADJUST_RELOC_COUNT (fixP, seg_reloc_count); | |
2796 | return seg_reloc_count; | |
2797 | } | |
2798 | ||
2799 | #endif /* defined (BFD_ASSEMBLER) || (!defined (BFD) && !defined (OBJ_VMS)) */ | |
2800 | ||
2801 | void | |
2802 | number_to_chars_bigendian (buf, val, n) | |
2803 | char *buf; | |
2804 | valueT val; | |
2805 | int n; | |
2806 | { | |
937149dd | 2807 | if (n <= 0) |
252b5132 RH |
2808 | abort (); |
2809 | while (n--) | |
2810 | { | |
2811 | buf[n] = val & 0xff; | |
2812 | val >>= 8; | |
2813 | } | |
2814 | } | |
2815 | ||
2816 | void | |
2817 | number_to_chars_littleendian (buf, val, n) | |
2818 | char *buf; | |
2819 | valueT val; | |
2820 | int n; | |
2821 | { | |
937149dd | 2822 | if (n <= 0) |
252b5132 RH |
2823 | abort (); |
2824 | while (n--) | |
2825 | { | |
2826 | *buf++ = val & 0xff; | |
2827 | val >>= 8; | |
2828 | } | |
2829 | } | |
2830 | ||
2831 | void | |
2832 | write_print_statistics (file) | |
2833 | FILE *file; | |
2834 | { | |
6d4d30bb | 2835 | fprintf (file, "fixups: %d\n", n_fixups); |
252b5132 RH |
2836 | } |
2837 | ||
efaf0ba4 | 2838 | /* For debugging. */ |
252b5132 RH |
2839 | extern int indent_level; |
2840 | ||
2841 | void | |
2842 | print_fixup (fixp) | |
2843 | fixS *fixp; | |
2844 | { | |
2845 | indent_level = 1; | |
2846 | fprintf (stderr, "fix %lx %s:%d", (long) fixp, fixp->fx_file, fixp->fx_line); | |
2847 | if (fixp->fx_pcrel) | |
2848 | fprintf (stderr, " pcrel"); | |
2849 | if (fixp->fx_pcrel_adjust) | |
2850 | fprintf (stderr, " pcrel_adjust=%d", fixp->fx_pcrel_adjust); | |
2851 | if (fixp->fx_im_disp) | |
2852 | { | |
2853 | #ifdef TC_NS32K | |
2854 | fprintf (stderr, " im_disp=%d", fixp->fx_im_disp); | |
2855 | #else | |
2856 | fprintf (stderr, " im_disp"); | |
2857 | #endif | |
2858 | } | |
2859 | if (fixp->fx_tcbit) | |
2860 | fprintf (stderr, " tcbit"); | |
2861 | if (fixp->fx_done) | |
2862 | fprintf (stderr, " done"); | |
2863 | fprintf (stderr, "\n size=%d frag=%lx where=%ld offset=%lx addnumber=%lx", | |
2864 | fixp->fx_size, (long) fixp->fx_frag, (long) fixp->fx_where, | |
2865 | (long) fixp->fx_offset, (long) fixp->fx_addnumber); | |
2866 | #ifdef BFD_ASSEMBLER | |
2867 | fprintf (stderr, "\n %s (%d)", bfd_get_reloc_code_name (fixp->fx_r_type), | |
2868 | fixp->fx_r_type); | |
2869 | #else | |
2870 | #ifdef NEED_FX_R_TYPE | |
2871 | fprintf (stderr, " r_type=%d", fixp->fx_r_type); | |
2872 | #endif | |
2873 | #endif | |
2874 | if (fixp->fx_addsy) | |
2875 | { | |
2876 | fprintf (stderr, "\n +<"); | |
2877 | print_symbol_value_1 (stderr, fixp->fx_addsy); | |
2878 | fprintf (stderr, ">"); | |
2879 | } | |
2880 | if (fixp->fx_subsy) | |
2881 | { | |
2882 | fprintf (stderr, "\n -<"); | |
2883 | print_symbol_value_1 (stderr, fixp->fx_subsy); | |
2884 | fprintf (stderr, ">"); | |
2885 | } | |
2886 | fprintf (stderr, "\n"); | |
2887 | #ifdef TC_FIX_DATA_PRINT | |
2888 | TC_FIX_DATA_PRINT (stderr, fixp); | |
2889 | #endif | |
2890 | } |