Commit | Line | Data |
---|---|---|
252b5132 | 1 | /* write.c - emit .o file |
f7e42eb4 | 2 | Copyright 1986, 1987, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, |
ae6063d4 | 3 | 1998, 1999, 2000, 2001, 2002, 2003 |
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 | 36 | #define TC_FORCE_RELOCATION(FIX) \ |
ae6063d4 | 37 | (generic_force_reloc (FIX)) |
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) \ | |
426318c5 | 54 | (! SEG_NORMAL (SEG)) |
a161fe53 AM |
55 | #endif |
56 | ||
57 | #ifndef TC_FORCE_RELOCATION_SUB_ABS | |
4f3cafa2 | 58 | #define TC_FORCE_RELOCATION_SUB_ABS(FIX) 0 |
a161fe53 AM |
59 | #endif |
60 | ||
61 | #ifndef TC_FORCE_RELOCATION_SUB_LOCAL | |
62 | #ifdef DIFF_EXPR_OK | |
4f3cafa2 | 63 | #define TC_FORCE_RELOCATION_SUB_LOCAL(FIX) 0 |
a161fe53 | 64 | #else |
4f3cafa2 | 65 | #define TC_FORCE_RELOCATION_SUB_LOCAL(FIX) 1 |
a161fe53 AM |
66 | #endif |
67 | #endif | |
68 | ||
69 | #ifndef TC_VALIDATE_FIX_SUB | |
70 | #ifdef UNDEFINED_DIFFERENCE_OK | |
71 | /* The PA needs this for PIC code generation. */ | |
72 | #define TC_VALIDATE_FIX_SUB(FIX) 1 | |
73 | #else | |
74 | #ifdef BFD_ASSEMBLER | |
75 | #define TC_VALIDATE_FIX_SUB(FIX) \ | |
76 | ((FIX)->fx_r_type == BFD_RELOC_GPREL32 \ | |
77 | || (FIX)->fx_r_type == BFD_RELOC_GPREL16) | |
78 | #else | |
79 | #define TC_VALIDATE_FIX_SUB(FIX) 0 | |
80 | #endif | |
81 | #endif | |
252b5132 RH |
82 | #endif |
83 | ||
58a77e41 EC |
84 | #ifndef TC_LINKRELAX_FIXUP |
85 | #define TC_LINKRELAX_FIXUP(SEG) 1 | |
86 | #endif | |
87 | ||
a161fe53 AM |
88 | #ifndef MD_APPLY_SYM_VALUE |
89 | #define MD_APPLY_SYM_VALUE(FIX) 1 | |
8f36cd18 | 90 | #endif |
ef99799a | 91 | |
87548816 NC |
92 | #ifndef TC_FINALIZE_SYMS_BEFORE_SIZE_SEG |
93 | #define TC_FINALIZE_SYMS_BEFORE_SIZE_SEG 1 | |
94 | #endif | |
95 | ||
252b5132 | 96 | #ifndef MD_PCREL_FROM_SECTION |
df44284e | 97 | #define MD_PCREL_FROM_SECTION(FIX, SEC) md_pcrel_from (FIX) |
252b5132 RH |
98 | #endif |
99 | ||
100 | #ifndef WORKING_DOT_WORD | |
5a38dc70 AM |
101 | extern const int md_short_jump_size; |
102 | extern const int md_long_jump_size; | |
252b5132 RH |
103 | #endif |
104 | ||
6386f3a7 AM |
105 | /* Used to control final evaluation of expressions. */ |
106 | int finalize_syms = 0; | |
e46d99eb | 107 | |
252b5132 | 108 | int symbol_table_frozen; |
a161fe53 AM |
109 | |
110 | symbolS *abs_section_sym; | |
111 | ||
26346241 AM |
112 | /* Remember the value of dot when parsing expressions. */ |
113 | addressT dot_value; | |
114 | ||
d7342424 | 115 | void print_fixup (fixS *); |
252b5132 RH |
116 | |
117 | #ifdef BFD_ASSEMBLER | |
d7342424 | 118 | static void renumber_sections (bfd *, asection *, PTR); |
252b5132 RH |
119 | |
120 | /* We generally attach relocs to frag chains. However, after we have | |
121 | chained these all together into a segment, any relocs we add after | |
122 | that must be attached to a segment. This will include relocs added | |
123 | in md_estimate_size_for_relax, for example. */ | |
124 | static int frags_chained = 0; | |
125 | #endif | |
126 | ||
127 | #ifndef BFD_ASSEMBLER | |
128 | ||
129 | #ifndef MANY_SEGMENTS | |
130 | struct frag *text_frag_root; | |
131 | struct frag *data_frag_root; | |
132 | struct frag *bss_frag_root; | |
133 | ||
efaf0ba4 NC |
134 | struct frag *text_last_frag; /* Last frag in segment. */ |
135 | struct frag *data_last_frag; /* Last frag in segment. */ | |
136 | static struct frag *bss_last_frag; /* Last frag in segment. */ | |
252b5132 RH |
137 | #endif |
138 | ||
139 | #ifndef BFD | |
140 | static object_headers headers; | |
141 | #endif | |
142 | ||
143 | long string_byte_count; | |
efaf0ba4 | 144 | char *next_object_file_charP; /* Tracks object file bytes. */ |
252b5132 RH |
145 | |
146 | #ifndef OBJ_VMS | |
147 | int magic_number_for_object_file = DEFAULT_MAGIC_NUMBER_FOR_OBJECT_FILE; | |
148 | #endif | |
149 | ||
efaf0ba4 | 150 | #endif /* BFD_ASSEMBLER */ |
252b5132 RH |
151 | |
152 | static int n_fixups; | |
153 | ||
154 | #ifdef BFD_ASSEMBLER | |
df44284e | 155 | #define RELOC_ENUM enum bfd_reloc_code_real |
252b5132 | 156 | #else |
df44284e AM |
157 | #define RELOC_ENUM int |
158 | #endif | |
159 | ||
d7342424 KH |
160 | static fixS *fix_new_internal (fragS *, int where, int size, |
161 | symbolS *add, symbolS *sub, | |
162 | offsetT offset, int pcrel, | |
163 | RELOC_ENUM r_type); | |
252b5132 | 164 | #if defined (BFD_ASSEMBLER) || (!defined (BFD) && !defined (OBJ_VMS)) |
d7342424 | 165 | static long fixup_segment (fixS *, segT); |
252b5132 | 166 | #endif |
d7342424 | 167 | static relax_addressT relax_align (relax_addressT addr, int align); |
252b5132 | 168 | #if defined (BFD_ASSEMBLER) || ! defined (BFD) |
d7342424 | 169 | static fragS *chain_frchains_together_1 (segT, struct frchain *); |
252b5132 RH |
170 | #endif |
171 | #ifdef BFD_ASSEMBLER | |
d7342424 KH |
172 | static void chain_frchains_together (bfd *, segT, PTR); |
173 | static void cvt_frag_to_fill (segT, fragS *); | |
174 | static void adjust_reloc_syms (bfd *, asection *, PTR); | |
175 | static void fix_segment (bfd *, asection *, PTR); | |
176 | static void write_relocs (bfd *, asection *, PTR); | |
177 | static void write_contents (bfd *, asection *, PTR); | |
178 | static void set_symtab (void); | |
252b5132 RH |
179 | #endif |
180 | #if defined (BFD_ASSEMBLER) || (! defined (BFD) && ! defined (OBJ_AOUT)) | |
d7342424 | 181 | static void merge_data_into_text (void); |
252b5132 RH |
182 | #endif |
183 | #if ! defined (BFD_ASSEMBLER) && ! defined (BFD) | |
d7342424 KH |
184 | static void cvt_frag_to_fill (object_headers *, segT, fragS *); |
185 | static void remove_subsegs (frchainS *, int, fragS **, fragS **); | |
186 | static void relax_and_size_all_segments (void); | |
252b5132 RH |
187 | #endif |
188 | ||
efaf0ba4 NC |
189 | /* Create a fixS in obstack 'notes'. */ |
190 | ||
252b5132 | 191 | static fixS * |
d7342424 KH |
192 | fix_new_internal (fragS *frag, /* Which frag? */ |
193 | int where, /* Where in that frag? */ | |
194 | int size, /* 1, 2, or 4 usually. */ | |
195 | symbolS *add_symbol, /* X_add_symbol. */ | |
196 | symbolS *sub_symbol, /* X_op_symbol. */ | |
197 | offsetT offset, /* X_add_number. */ | |
198 | int pcrel, /* TRUE if PC-relative relocation. */ | |
199 | RELOC_ENUM r_type ATTRIBUTE_UNUSED /* Relocation type. */) | |
252b5132 RH |
200 | { |
201 | fixS *fixP; | |
202 | ||
203 | n_fixups++; | |
204 | ||
205 | fixP = (fixS *) obstack_alloc (¬es, sizeof (fixS)); | |
206 | ||
207 | fixP->fx_frag = frag; | |
208 | fixP->fx_where = where; | |
209 | fixP->fx_size = size; | |
210 | /* We've made fx_size a narrow field; check that it's wide enough. */ | |
211 | if (fixP->fx_size != size) | |
212 | { | |
213 | as_bad (_("field fx_size too small to hold %d"), size); | |
214 | abort (); | |
215 | } | |
216 | fixP->fx_addsy = add_symbol; | |
217 | fixP->fx_subsy = sub_symbol; | |
218 | fixP->fx_offset = offset; | |
26346241 | 219 | fixP->fx_dot_value = dot_value; |
252b5132 RH |
220 | fixP->fx_pcrel = pcrel; |
221 | fixP->fx_plt = 0; | |
222 | #if defined(NEED_FX_R_TYPE) || defined (BFD_ASSEMBLER) | |
223 | fixP->fx_r_type = r_type; | |
224 | #endif | |
225 | fixP->fx_im_disp = 0; | |
226 | fixP->fx_pcrel_adjust = 0; | |
227 | fixP->fx_bit_fixP = 0; | |
228 | fixP->fx_addnumber = 0; | |
229 | fixP->fx_tcbit = 0; | |
230 | fixP->fx_done = 0; | |
231 | fixP->fx_no_overflow = 0; | |
232 | fixP->fx_signed = 0; | |
233 | ||
234 | #ifdef USING_CGEN | |
235 | fixP->fx_cgen.insn = NULL; | |
236 | fixP->fx_cgen.opinfo = 0; | |
237 | #endif | |
238 | ||
239 | #ifdef TC_FIX_TYPE | |
efaf0ba4 | 240 | TC_INIT_FIX_DATA (fixP); |
252b5132 RH |
241 | #endif |
242 | ||
243 | as_where (&fixP->fx_file, &fixP->fx_line); | |
244 | ||
245 | /* Usually, we want relocs sorted numerically, but while | |
246 | comparing to older versions of gas that have relocs | |
247 | reverse sorted, it is convenient to have this compile | |
efaf0ba4 | 248 | time option. xoxorich. */ |
252b5132 RH |
249 | { |
250 | ||
251 | #ifdef BFD_ASSEMBLER | |
252 | fixS **seg_fix_rootP = (frags_chained | |
253 | ? &seg_info (now_seg)->fix_root | |
254 | : &frchain_now->fix_root); | |
255 | fixS **seg_fix_tailP = (frags_chained | |
256 | ? &seg_info (now_seg)->fix_tail | |
257 | : &frchain_now->fix_tail); | |
258 | #endif | |
259 | ||
260 | #ifdef REVERSE_SORT_RELOCS | |
261 | ||
262 | fixP->fx_next = *seg_fix_rootP; | |
263 | *seg_fix_rootP = fixP; | |
264 | ||
efaf0ba4 | 265 | #else /* REVERSE_SORT_RELOCS */ |
252b5132 RH |
266 | |
267 | fixP->fx_next = NULL; | |
268 | ||
269 | if (*seg_fix_tailP) | |
270 | (*seg_fix_tailP)->fx_next = fixP; | |
271 | else | |
272 | *seg_fix_rootP = fixP; | |
273 | *seg_fix_tailP = fixP; | |
274 | ||
efaf0ba4 | 275 | #endif /* REVERSE_SORT_RELOCS */ |
252b5132 RH |
276 | } |
277 | ||
278 | return fixP; | |
279 | } | |
280 | ||
281 | /* Create a fixup relative to a symbol (plus a constant). */ | |
282 | ||
283 | fixS * | |
d7342424 KH |
284 | fix_new (fragS *frag, /* Which frag? */ |
285 | int where, /* Where in that frag? */ | |
286 | int size, /* 1, 2, or 4 usually. */ | |
287 | symbolS *add_symbol, /* X_add_symbol. */ | |
288 | offsetT offset, /* X_add_number. */ | |
289 | int pcrel, /* TRUE if PC-relative relocation. */ | |
290 | RELOC_ENUM r_type /* Relocation type. */) | |
252b5132 RH |
291 | { |
292 | return fix_new_internal (frag, where, size, add_symbol, | |
293 | (symbolS *) NULL, offset, pcrel, r_type); | |
294 | } | |
295 | ||
296 | /* Create a fixup for an expression. Currently we only support fixups | |
297 | for difference expressions. That is itself more than most object | |
298 | file formats support anyhow. */ | |
299 | ||
300 | fixS * | |
d7342424 KH |
301 | fix_new_exp (fragS *frag, /* Which frag? */ |
302 | int where, /* Where in that frag? */ | |
303 | int size, /* 1, 2, or 4 usually. */ | |
304 | expressionS *exp, /* Expression. */ | |
305 | int pcrel, /* TRUE if PC-relative relocation. */ | |
306 | RELOC_ENUM r_type /* Relocation type. */) | |
252b5132 RH |
307 | { |
308 | symbolS *add = NULL; | |
309 | symbolS *sub = NULL; | |
310 | offsetT off = 0; | |
311 | ||
312 | switch (exp->X_op) | |
313 | { | |
314 | case O_absent: | |
315 | break; | |
316 | ||
37006e43 NC |
317 | case O_register: |
318 | as_bad (_("register value used as expression")); | |
319 | break; | |
320 | ||
252b5132 RH |
321 | case O_add: |
322 | /* This comes up when _GLOBAL_OFFSET_TABLE_+(.-L0) is read, if | |
323 | the difference expression cannot immediately be reduced. */ | |
324 | { | |
325 | symbolS *stmp = make_expr_symbol (exp); | |
58a77e41 | 326 | |
252b5132 RH |
327 | exp->X_op = O_symbol; |
328 | exp->X_op_symbol = 0; | |
329 | exp->X_add_symbol = stmp; | |
330 | exp->X_add_number = 0; | |
58a77e41 | 331 | |
252b5132 RH |
332 | return fix_new_exp (frag, where, size, exp, pcrel, r_type); |
333 | } | |
334 | ||
335 | case O_symbol_rva: | |
336 | add = exp->X_add_symbol; | |
337 | off = exp->X_add_number; | |
338 | ||
339 | #if defined(BFD_ASSEMBLER) | |
340 | r_type = BFD_RELOC_RVA; | |
341 | #else | |
342 | #if defined(TC_RVA_RELOC) | |
343 | r_type = TC_RVA_RELOC; | |
344 | #else | |
efaf0ba4 | 345 | as_fatal (_("rva not supported")); |
252b5132 RH |
346 | #endif |
347 | #endif | |
348 | break; | |
349 | ||
350 | case O_uminus: | |
351 | sub = exp->X_add_symbol; | |
352 | off = exp->X_add_number; | |
353 | break; | |
354 | ||
355 | case O_subtract: | |
356 | sub = exp->X_op_symbol; | |
357 | /* Fall through. */ | |
358 | case O_symbol: | |
359 | add = exp->X_add_symbol; | |
efaf0ba4 | 360 | /* Fall through. */ |
252b5132 RH |
361 | case O_constant: |
362 | off = exp->X_add_number; | |
363 | break; | |
364 | ||
365 | default: | |
366 | add = make_expr_symbol (exp); | |
367 | break; | |
368 | } | |
369 | ||
efaf0ba4 | 370 | return fix_new_internal (frag, where, size, add, sub, off, pcrel, r_type); |
252b5132 RH |
371 | } |
372 | ||
ae6063d4 AM |
373 | /* Generic function to determine whether a fixup requires a relocation. */ |
374 | int | |
d7342424 | 375 | generic_force_reloc (fixS *fix) |
ae6063d4 AM |
376 | { |
377 | #ifdef BFD_ASSEMBLER | |
378 | if (fix->fx_r_type == BFD_RELOC_VTABLE_INHERIT | |
379 | || fix->fx_r_type == BFD_RELOC_VTABLE_ENTRY) | |
380 | return 1; | |
381 | #endif | |
382 | return S_FORCE_RELOC (fix->fx_addsy, fix->fx_subsy == NULL); | |
383 | } | |
384 | ||
252b5132 RH |
385 | /* Append a string onto another string, bumping the pointer along. */ |
386 | void | |
d7342424 | 387 | append (char **charPP, char *fromP, unsigned long length) |
252b5132 | 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 | 406 | void |
d7342424 KH |
407 | record_alignment (/* Segment to which alignment pertains. */ |
408 | segT seg, | |
409 | /* Alignment, as a power of 2 (e.g., 1 => 2-byte | |
410 | boundary, 2 => 4-byte boundary, etc.) */ | |
411 | int align) | |
252b5132 RH |
412 | { |
413 | if (seg == absolute_section) | |
414 | return; | |
415 | #ifdef BFD_ASSEMBLER | |
416 | if ((unsigned int) align > bfd_get_section_alignment (stdoutput, seg)) | |
417 | bfd_set_section_alignment (stdoutput, seg, align); | |
418 | #else | |
419 | if (align > section_alignment[(int) seg]) | |
420 | section_alignment[(int) seg] = align; | |
421 | #endif | |
422 | } | |
423 | ||
0a9ef439 | 424 | int |
d7342424 | 425 | get_recorded_alignment (segT seg) |
0a9ef439 RH |
426 | { |
427 | if (seg == absolute_section) | |
428 | return 0; | |
429 | #ifdef BFD_ASSEMBLER | |
430 | return bfd_get_section_alignment (stdoutput, seg); | |
431 | #else | |
432 | return section_alignment[(int) seg]; | |
433 | #endif | |
434 | } | |
435 | ||
252b5132 RH |
436 | #ifdef BFD_ASSEMBLER |
437 | ||
438 | /* Reset the section indices after removing the gas created sections. */ | |
439 | ||
440 | static void | |
d7342424 | 441 | renumber_sections (bfd *abfd ATTRIBUTE_UNUSED, asection *sec, PTR countparg) |
252b5132 RH |
442 | { |
443 | int *countp = (int *) countparg; | |
444 | ||
445 | sec->index = *countp; | |
446 | ++*countp; | |
447 | } | |
448 | ||
efaf0ba4 | 449 | #endif /* defined (BFD_ASSEMBLER) */ |
252b5132 RH |
450 | |
451 | #if defined (BFD_ASSEMBLER) || ! defined (BFD) | |
452 | ||
453 | static fragS * | |
d7342424 | 454 | chain_frchains_together_1 (segT section, struct frchain *frchp) |
252b5132 RH |
455 | { |
456 | fragS dummy, *prev_frag = &dummy; | |
457 | #ifdef BFD_ASSEMBLER | |
458 | fixS fix_dummy, *prev_fix = &fix_dummy; | |
459 | #endif | |
460 | ||
461 | for (; frchp && frchp->frch_seg == section; frchp = frchp->frch_next) | |
462 | { | |
463 | prev_frag->fr_next = frchp->frch_root; | |
464 | prev_frag = frchp->frch_last; | |
465 | assert (prev_frag->fr_type != 0); | |
466 | #ifdef BFD_ASSEMBLER | |
467 | if (frchp->fix_root != (fixS *) NULL) | |
468 | { | |
469 | if (seg_info (section)->fix_root == (fixS *) NULL) | |
470 | seg_info (section)->fix_root = frchp->fix_root; | |
471 | prev_fix->fx_next = frchp->fix_root; | |
472 | seg_info (section)->fix_tail = frchp->fix_tail; | |
473 | prev_fix = frchp->fix_tail; | |
474 | } | |
475 | #endif | |
476 | } | |
477 | assert (prev_frag->fr_type != 0); | |
478 | prev_frag->fr_next = 0; | |
479 | return prev_frag; | |
480 | } | |
481 | ||
482 | #endif | |
483 | ||
484 | #ifdef BFD_ASSEMBLER | |
485 | ||
486 | static void | |
d7342424 KH |
487 | chain_frchains_together (bfd *abfd ATTRIBUTE_UNUSED, |
488 | segT section, | |
489 | PTR xxx ATTRIBUTE_UNUSED) | |
252b5132 RH |
490 | { |
491 | segment_info_type *info; | |
492 | ||
493 | /* BFD may have introduced its own sections without using | |
494 | subseg_new, so it is possible that seg_info is NULL. */ | |
495 | info = seg_info (section); | |
496 | if (info != (segment_info_type *) NULL) | |
efaf0ba4 NC |
497 | info->frchainP->frch_last |
498 | = chain_frchains_together_1 (section, info->frchainP); | |
252b5132 RH |
499 | |
500 | /* Now that we've chained the frags together, we must add new fixups | |
501 | to the segment, not to the frag chain. */ | |
502 | frags_chained = 1; | |
503 | } | |
504 | ||
505 | #endif | |
506 | ||
507 | #if !defined (BFD) && !defined (BFD_ASSEMBLER) | |
508 | ||
509 | static void | |
d7342424 | 510 | remove_subsegs (frchainS *head, int seg, fragS **root, fragS **last) |
252b5132 RH |
511 | { |
512 | *root = head->frch_root; | |
513 | *last = chain_frchains_together_1 (seg, head); | |
514 | } | |
515 | ||
efaf0ba4 | 516 | #endif /* BFD */ |
252b5132 RH |
517 | |
518 | #if defined (BFD_ASSEMBLER) || !defined (BFD) | |
519 | ||
520 | #ifdef BFD_ASSEMBLER | |
521 | static void | |
d7342424 | 522 | cvt_frag_to_fill (segT sec ATTRIBUTE_UNUSED, fragS *fragP) |
252b5132 RH |
523 | #else |
524 | static void | |
d7342424 | 525 | cvt_frag_to_fill (object_headers *headersP, segT sec, fragS *fragP) |
252b5132 RH |
526 | #endif |
527 | { | |
528 | switch (fragP->fr_type) | |
529 | { | |
530 | case rs_align: | |
531 | case rs_align_code: | |
0a9ef439 | 532 | case rs_align_test: |
252b5132 RH |
533 | case rs_org: |
534 | case rs_space: | |
535 | #ifdef HANDLE_ALIGN | |
536 | HANDLE_ALIGN (fragP); | |
537 | #endif | |
538 | know (fragP->fr_next != NULL); | |
539 | fragP->fr_offset = (fragP->fr_next->fr_address | |
540 | - fragP->fr_address | |
541 | - fragP->fr_fix) / fragP->fr_var; | |
542 | if (fragP->fr_offset < 0) | |
543 | { | |
14ad458a ILT |
544 | as_bad_where (fragP->fr_file, fragP->fr_line, |
545 | _("attempt to .org/.space backwards? (%ld)"), | |
546 | (long) fragP->fr_offset); | |
3f3cdb03 | 547 | fragP->fr_offset = 0; |
252b5132 RH |
548 | } |
549 | fragP->fr_type = rs_fill; | |
550 | break; | |
551 | ||
552 | case rs_fill: | |
553 | break; | |
554 | ||
555 | case rs_leb128: | |
556 | { | |
557 | valueT value = S_GET_VALUE (fragP->fr_symbol); | |
558 | int size; | |
559 | ||
560 | size = output_leb128 (fragP->fr_literal + fragP->fr_fix, value, | |
561 | fragP->fr_subtype); | |
562 | ||
563 | fragP->fr_fix += size; | |
564 | fragP->fr_type = rs_fill; | |
565 | fragP->fr_var = 0; | |
566 | fragP->fr_offset = 0; | |
567 | fragP->fr_symbol = NULL; | |
568 | } | |
569 | break; | |
570 | ||
571 | case rs_cfa: | |
572 | eh_frame_convert_frag (fragP); | |
573 | break; | |
574 | ||
220e750f RH |
575 | case rs_dwarf2dbg: |
576 | dwarf2dbg_convert_frag (fragP); | |
577 | break; | |
578 | ||
252b5132 RH |
579 | case rs_machine_dependent: |
580 | #ifdef BFD_ASSEMBLER | |
581 | md_convert_frag (stdoutput, sec, fragP); | |
582 | #else | |
583 | md_convert_frag (headersP, sec, fragP); | |
584 | #endif | |
585 | ||
586 | assert (fragP->fr_next == NULL | |
587 | || ((offsetT) (fragP->fr_next->fr_address - fragP->fr_address) | |
588 | == fragP->fr_fix)); | |
589 | ||
efaf0ba4 NC |
590 | /* After md_convert_frag, we make the frag into a ".space 0". |
591 | md_convert_frag() should set up any fixSs and constants | |
592 | required. */ | |
252b5132 RH |
593 | frag_wane (fragP); |
594 | break; | |
595 | ||
596 | #ifndef WORKING_DOT_WORD | |
597 | case rs_broken_word: | |
598 | { | |
599 | struct broken_word *lie; | |
600 | ||
601 | if (fragP->fr_subtype) | |
602 | { | |
603 | fragP->fr_fix += md_short_jump_size; | |
604 | for (lie = (struct broken_word *) (fragP->fr_symbol); | |
605 | lie && lie->dispfrag == fragP; | |
606 | lie = lie->next_broken_word) | |
607 | if (lie->added == 1) | |
608 | fragP->fr_fix += md_long_jump_size; | |
609 | } | |
610 | frag_wane (fragP); | |
611 | } | |
612 | break; | |
613 | #endif | |
614 | ||
615 | default: | |
616 | BAD_CASE (fragP->fr_type); | |
617 | break; | |
618 | } | |
619 | } | |
620 | ||
efaf0ba4 | 621 | #endif /* defined (BFD_ASSEMBLER) || !defined (BFD) */ |
252b5132 RH |
622 | |
623 | #ifdef BFD_ASSEMBLER | |
d7342424 KH |
624 | static void relax_seg (bfd *, asection *, PTR); |
625 | ||
252b5132 | 626 | static void |
d7342424 | 627 | relax_seg (bfd *abfd ATTRIBUTE_UNUSED, asection *sec, PTR xxx) |
e46d99eb AM |
628 | { |
629 | segment_info_type *seginfo = seg_info (sec); | |
630 | ||
631 | if (seginfo && seginfo->frchainP | |
632 | && relax_segment (seginfo->frchainP->frch_root, sec)) | |
633 | { | |
634 | int *result = (int *) xxx; | |
635 | *result = 1; | |
636 | } | |
637 | } | |
638 | ||
d7342424 KH |
639 | static void size_seg (bfd *, asection *, PTR); |
640 | ||
e46d99eb | 641 | static void |
d7342424 | 642 | size_seg (bfd *abfd, asection *sec, PTR xxx ATTRIBUTE_UNUSED) |
252b5132 RH |
643 | { |
644 | flagword flags; | |
645 | fragS *fragp; | |
646 | segment_info_type *seginfo; | |
647 | int x; | |
648 | valueT size, newsize; | |
649 | ||
650 | subseg_change (sec, 0); | |
651 | ||
252b5132 RH |
652 | seginfo = seg_info (sec); |
653 | if (seginfo && seginfo->frchainP) | |
654 | { | |
252b5132 RH |
655 | for (fragp = seginfo->frchainP->frch_root; fragp; fragp = fragp->fr_next) |
656 | cvt_frag_to_fill (sec, fragp); | |
657 | for (fragp = seginfo->frchainP->frch_root; | |
658 | fragp->fr_next; | |
659 | fragp = fragp->fr_next) | |
efaf0ba4 NC |
660 | /* Walk to last elt. */ |
661 | ; | |
252b5132 RH |
662 | size = fragp->fr_address + fragp->fr_fix; |
663 | } | |
664 | else | |
665 | size = 0; | |
666 | ||
e46d99eb AM |
667 | flags = bfd_get_section_flags (abfd, sec); |
668 | ||
252b5132 RH |
669 | if (size > 0 && ! seginfo->bss) |
670 | flags |= SEC_HAS_CONTENTS; | |
671 | ||
672 | /* @@ This is just an approximation. */ | |
673 | if (seginfo && seginfo->fix_root) | |
674 | flags |= SEC_RELOC; | |
675 | else | |
676 | flags &= ~SEC_RELOC; | |
677 | x = bfd_set_section_flags (abfd, sec, flags); | |
b34976b6 | 678 | assert (x); |
252b5132 RH |
679 | |
680 | newsize = md_section_align (sec, size); | |
681 | x = bfd_set_section_size (abfd, sec, newsize); | |
b34976b6 | 682 | assert (x); |
252b5132 RH |
683 | |
684 | /* If the size had to be rounded up, add some padding in the last | |
685 | non-empty frag. */ | |
686 | assert (newsize >= size); | |
687 | if (size != newsize) | |
688 | { | |
689 | fragS *last = seginfo->frchainP->frch_last; | |
690 | fragp = seginfo->frchainP->frch_root; | |
691 | while (fragp->fr_next != last) | |
692 | fragp = fragp->fr_next; | |
693 | last->fr_address = size; | |
18e1d487 AM |
694 | if ((newsize - size) % fragp->fr_var == 0) |
695 | fragp->fr_offset += (newsize - size) / fragp->fr_var; | |
696 | else | |
697 | /* If we hit this abort, it's likely due to subsegs_finish not | |
698 | providing sufficient alignment on the last frag, and the | |
699 | machine dependent code using alignment frags with fr_var | |
700 | greater than 1. */ | |
701 | abort (); | |
252b5132 RH |
702 | } |
703 | ||
704 | #ifdef tc_frob_section | |
705 | tc_frob_section (sec); | |
706 | #endif | |
707 | #ifdef obj_frob_section | |
708 | obj_frob_section (sec); | |
709 | #endif | |
710 | } | |
711 | ||
712 | #ifdef DEBUG2 | |
713 | static void | |
714 | dump_section_relocs (abfd, sec, stream_) | |
e723ef7c | 715 | bfd *abfd ATTRIBUTE_UNUSED; |
252b5132 RH |
716 | asection *sec; |
717 | char *stream_; | |
718 | { | |
719 | FILE *stream = (FILE *) stream_; | |
720 | segment_info_type *seginfo = seg_info (sec); | |
721 | fixS *fixp = seginfo->fix_root; | |
722 | ||
723 | if (!fixp) | |
724 | return; | |
725 | ||
726 | fprintf (stream, "sec %s relocs:\n", sec->name); | |
727 | while (fixp) | |
728 | { | |
729 | symbolS *s = fixp->fx_addsy; | |
e723ef7c ILT |
730 | |
731 | fprintf (stream, " %08lx: type %d ", (unsigned long) fixp, | |
732 | (int) fixp->fx_r_type); | |
733 | if (s == NULL) | |
734 | fprintf (stream, "no sym\n"); | |
735 | else | |
252b5132 | 736 | { |
e723ef7c ILT |
737 | print_symbol_value_1 (stream, s); |
738 | fprintf (stream, "\n"); | |
252b5132 | 739 | } |
252b5132 RH |
740 | fixp = fixp->fx_next; |
741 | } | |
742 | } | |
743 | #else | |
744 | #define dump_section_relocs(ABFD,SEC,STREAM) ((void) 0) | |
745 | #endif | |
746 | ||
747 | #ifndef EMIT_SECTION_SYMBOLS | |
748 | #define EMIT_SECTION_SYMBOLS 1 | |
749 | #endif | |
750 | ||
df44284e AM |
751 | /* This pass over fixups decides whether symbols can be replaced with |
752 | section symbols. */ | |
753 | ||
252b5132 | 754 | static void |
d7342424 KH |
755 | adjust_reloc_syms (bfd *abfd ATTRIBUTE_UNUSED, |
756 | asection *sec, | |
757 | PTR xxx ATTRIBUTE_UNUSED) | |
252b5132 RH |
758 | { |
759 | segment_info_type *seginfo = seg_info (sec); | |
760 | fixS *fixp; | |
761 | ||
762 | if (seginfo == NULL) | |
763 | return; | |
764 | ||
765 | dump_section_relocs (abfd, sec, stderr); | |
766 | ||
767 | for (fixp = seginfo->fix_root; fixp; fixp = fixp->fx_next) | |
768 | if (fixp->fx_done) | |
efaf0ba4 NC |
769 | /* Ignore it. */ |
770 | ; | |
252b5132 RH |
771 | else if (fixp->fx_addsy) |
772 | { | |
773 | symbolS *sym; | |
774 | asection *symsec; | |
775 | ||
776 | #ifdef DEBUG5 | |
777 | fprintf (stderr, "\n\nadjusting fixup:\n"); | |
778 | print_fixup (fixp); | |
779 | #endif | |
780 | ||
781 | sym = fixp->fx_addsy; | |
782 | ||
783 | /* All symbols should have already been resolved at this | |
784 | point. It is possible to see unresolved expression | |
785 | symbols, though, since they are not in the regular symbol | |
786 | table. */ | |
df44284e | 787 | resolve_symbol_value (sym); |
efaf0ba4 | 788 | |
49309057 | 789 | if (fixp->fx_subsy != NULL) |
6386f3a7 | 790 | resolve_symbol_value (fixp->fx_subsy); |
252b5132 RH |
791 | |
792 | /* If this symbol is equated to an undefined symbol, convert | |
793 | the fixup to being against that symbol. */ | |
df44284e | 794 | if (symbol_equated_reloc_p (sym)) |
252b5132 | 795 | { |
49309057 ILT |
796 | fixp->fx_offset += symbol_get_value_expression (sym)->X_add_number; |
797 | sym = symbol_get_value_expression (sym)->X_add_symbol; | |
252b5132 RH |
798 | fixp->fx_addsy = sym; |
799 | } | |
800 | ||
df44284e | 801 | if (symbol_mri_common_p (sym)) |
252b5132 RH |
802 | { |
803 | /* These symbols are handled specially in fixup_segment. */ | |
df44284e | 804 | continue; |
252b5132 RH |
805 | } |
806 | ||
a161fe53 AM |
807 | /* If the symbol is undefined, common, weak, or global (ELF |
808 | shared libs), we can't replace it with the section symbol. */ | |
ae6063d4 | 809 | if (S_FORCE_RELOC (fixp->fx_addsy, 1)) |
a161fe53 AM |
810 | continue; |
811 | ||
812 | /* Is there some other (target cpu dependent) reason we can't adjust | |
813 | this one? (E.g. relocations involving function addresses on | |
814 | the PA. */ | |
815 | #ifdef tc_fix_adjustable | |
816 | if (! tc_fix_adjustable (fixp)) | |
817 | continue; | |
818 | #endif | |
819 | ||
820 | /* Since we're reducing to section symbols, don't attempt to reduce | |
821 | anything that's already using one. */ | |
822 | if (symbol_section_p (sym)) | |
823 | continue; | |
824 | ||
252b5132 | 825 | symsec = S_GET_SEGMENT (sym); |
252b5132 RH |
826 | if (symsec == NULL) |
827 | abort (); | |
efaf0ba4 | 828 | |
252b5132 RH |
829 | if (bfd_is_abs_section (symsec)) |
830 | { | |
a161fe53 AM |
831 | /* The fixup_segment routine normally will not use this |
832 | symbol in a relocation. */ | |
df44284e | 833 | continue; |
252b5132 RH |
834 | } |
835 | ||
7565ed77 ILT |
836 | /* Don't try to reduce relocs which refer to non-local symbols |
837 | in .linkonce sections. It can lead to confusion when a | |
838 | debugging section refers to a .linkonce section. I hope | |
839 | this will always be correct. */ | |
840 | if (symsec != sec && ! S_IS_LOCAL (sym)) | |
252b5132 | 841 | { |
a161fe53 AM |
842 | if ((symsec->flags & SEC_LINK_ONCE) != 0 |
843 | || (IS_ELF | |
844 | /* The GNU toolchain uses an extension for ELF: a | |
845 | section beginning with the magic string | |
846 | .gnu.linkonce is a linkonce section. */ | |
847 | && strncmp (segment_name (symsec), ".gnu.linkonce", | |
848 | sizeof ".gnu.linkonce" - 1) == 0)) | |
849 | continue; | |
252b5132 | 850 | } |
f7460f5f JJ |
851 | |
852 | /* Never adjust a reloc against local symbol in a merge section | |
853 | with non-zero addend. */ | |
5045ec7a AM |
854 | if ((symsec->flags & SEC_MERGE) != 0 |
855 | && (fixp->fx_offset != 0 || fixp->fx_subsy != NULL)) | |
a161fe53 | 856 | continue; |
13ae64f3 JJ |
857 | |
858 | /* Never adjust a reloc against TLS local symbol. */ | |
df44284e | 859 | if ((symsec->flags & SEC_THREAD_LOCAL) != 0) |
a161fe53 | 860 | continue; |
252b5132 | 861 | |
a161fe53 | 862 | /* We refetch the segment when calling section_symbol, rather |
252b5132 | 863 | than using symsec, because S_GET_VALUE may wind up changing |
efaf0ba4 | 864 | the section when it calls resolve_symbol_value. */ |
252b5132 RH |
865 | fixp->fx_offset += S_GET_VALUE (sym); |
866 | fixp->fx_addsy = section_symbol (S_GET_SEGMENT (sym)); | |
e723ef7c ILT |
867 | #ifdef DEBUG5 |
868 | fprintf (stderr, "\nadjusted fixup:\n"); | |
869 | print_fixup (fixp); | |
870 | #endif | |
252b5132 | 871 | } |
252b5132 RH |
872 | |
873 | dump_section_relocs (abfd, sec, stderr); | |
874 | } | |
875 | ||
a161fe53 | 876 | static void |
d7342424 KH |
877 | fix_segment (bfd *abfd ATTRIBUTE_UNUSED, |
878 | asection *sec, | |
879 | PTR xxx ATTRIBUTE_UNUSED) | |
a161fe53 AM |
880 | { |
881 | segment_info_type *seginfo = seg_info (sec); | |
882 | ||
883 | fixup_segment (seginfo->fix_root, sec); | |
884 | } | |
885 | ||
252b5132 | 886 | static void |
d7342424 | 887 | write_relocs (bfd *abfd, asection *sec, PTR xxx ATTRIBUTE_UNUSED) |
252b5132 RH |
888 | { |
889 | segment_info_type *seginfo = seg_info (sec); | |
927781e2 | 890 | unsigned int i; |
252b5132 RH |
891 | unsigned int n; |
892 | arelent **relocs; | |
893 | fixS *fixp; | |
894 | char *err; | |
895 | ||
896 | /* If seginfo is NULL, we did not create this section; don't do | |
897 | anything with it. */ | |
898 | if (seginfo == NULL) | |
899 | return; | |
900 | ||
252b5132 RH |
901 | n = 0; |
902 | for (fixp = seginfo->fix_root; fixp; fixp = fixp->fx_next) | |
903 | n++; | |
904 | ||
905 | #ifndef RELOC_EXPANSION_POSSIBLE | |
906 | /* Set up reloc information as well. */ | |
d25d759d | 907 | relocs = (arelent **) xcalloc (n, sizeof (arelent *)); |
252b5132 RH |
908 | |
909 | i = 0; | |
910 | for (fixp = seginfo->fix_root; fixp != (fixS *) NULL; fixp = fixp->fx_next) | |
911 | { | |
912 | arelent *reloc; | |
913 | bfd_reloc_status_type s; | |
914 | symbolS *sym; | |
915 | ||
916 | if (fixp->fx_done) | |
917 | { | |
918 | n--; | |
919 | continue; | |
920 | } | |
921 | ||
922 | /* If this is an undefined symbol which was equated to another | |
e0890092 | 923 | symbol, then generate the reloc against the latter symbol |
252b5132 RH |
924 | rather than the former. */ |
925 | sym = fixp->fx_addsy; | |
e0890092 | 926 | while (symbol_equated_reloc_p (sym)) |
252b5132 RH |
927 | { |
928 | symbolS *n; | |
929 | ||
930 | /* We must avoid looping, as that can occur with a badly | |
931 | written program. */ | |
49309057 | 932 | n = symbol_get_value_expression (sym)->X_add_symbol; |
252b5132 RH |
933 | if (n == sym) |
934 | break; | |
49309057 | 935 | fixp->fx_offset += symbol_get_value_expression (sym)->X_add_number; |
252b5132 RH |
936 | sym = n; |
937 | } | |
938 | fixp->fx_addsy = sym; | |
939 | ||
940 | reloc = tc_gen_reloc (sec, fixp); | |
941 | if (!reloc) | |
942 | { | |
943 | n--; | |
944 | continue; | |
945 | } | |
946 | ||
947 | #if 0 | |
948 | /* This test is triggered inappropriately for the SH. */ | |
949 | if (fixp->fx_where + fixp->fx_size | |
950 | > fixp->fx_frag->fr_fix + fixp->fx_frag->fr_offset) | |
951 | abort (); | |
952 | #endif | |
953 | ||
954 | s = bfd_install_relocation (stdoutput, reloc, | |
955 | fixp->fx_frag->fr_literal, | |
956 | fixp->fx_frag->fr_address, | |
957 | sec, &err); | |
958 | switch (s) | |
959 | { | |
960 | case bfd_reloc_ok: | |
961 | break; | |
962 | case bfd_reloc_overflow: | |
df44284e AM |
963 | as_bad_where (fixp->fx_file, fixp->fx_line, |
964 | _("relocation overflow")); | |
252b5132 RH |
965 | break; |
966 | case bfd_reloc_outofrange: | |
df44284e AM |
967 | as_bad_where (fixp->fx_file, fixp->fx_line, |
968 | _("relocation out of range")); | |
252b5132 RH |
969 | break; |
970 | default: | |
971 | as_fatal (_("%s:%u: bad return from bfd_install_relocation: %x"), | |
972 | fixp->fx_file, fixp->fx_line, s); | |
973 | } | |
974 | relocs[i++] = reloc; | |
975 | } | |
976 | #else | |
977 | n = n * MAX_RELOC_EXPANSION; | |
978 | /* Set up reloc information as well. */ | |
d25d759d | 979 | relocs = (arelent **) xcalloc (n, sizeof (arelent *)); |
252b5132 RH |
980 | |
981 | i = 0; | |
982 | for (fixp = seginfo->fix_root; fixp != (fixS *) NULL; fixp = fixp->fx_next) | |
983 | { | |
984 | arelent **reloc; | |
252b5132 RH |
985 | bfd_reloc_status_type s; |
986 | symbolS *sym; | |
987 | int j; | |
988 | ||
989 | if (fixp->fx_done) | |
990 | { | |
991 | n--; | |
992 | continue; | |
993 | } | |
994 | ||
995 | /* If this is an undefined symbol which was equated to another | |
44852b19 | 996 | symbol, then generate the reloc against the latter symbol |
252b5132 RH |
997 | rather than the former. */ |
998 | sym = fixp->fx_addsy; | |
e0890092 | 999 | while (symbol_equated_reloc_p (sym)) |
df44284e AM |
1000 | { |
1001 | symbolS *n; | |
1002 | ||
1003 | /* We must avoid looping, as that can occur with a badly | |
1004 | written program. */ | |
1005 | n = symbol_get_value_expression (sym)->X_add_symbol; | |
1006 | if (n == sym) | |
1007 | break; | |
1008 | fixp->fx_offset += symbol_get_value_expression (sym)->X_add_number; | |
1009 | sym = n; | |
1010 | } | |
252b5132 RH |
1011 | fixp->fx_addsy = sym; |
1012 | ||
1013 | reloc = tc_gen_reloc (sec, fixp); | |
1014 | ||
1015 | for (j = 0; reloc[j]; j++) | |
1016 | { | |
efaf0ba4 NC |
1017 | relocs[i++] = reloc[j]; |
1018 | assert (i <= n); | |
252b5132 | 1019 | } |
252b5132 RH |
1020 | if (fixp->fx_where + fixp->fx_size |
1021 | > fixp->fx_frag->fr_fix + fixp->fx_frag->fr_offset) | |
1022 | as_bad_where (fixp->fx_file, fixp->fx_line, | |
1023 | _("internal error: fixup not contained within frag")); | |
1024 | for (j = 0; reloc[j]; j++) | |
efaf0ba4 | 1025 | { |
252b5132 RH |
1026 | s = bfd_install_relocation (stdoutput, reloc[j], |
1027 | fixp->fx_frag->fr_literal, | |
1028 | fixp->fx_frag->fr_address, | |
1029 | sec, &err); | |
efaf0ba4 | 1030 | switch (s) |
252b5132 RH |
1031 | { |
1032 | case bfd_reloc_ok: | |
1033 | break; | |
1034 | case bfd_reloc_overflow: | |
1035 | as_bad_where (fixp->fx_file, fixp->fx_line, | |
1036 | _("relocation overflow")); | |
1037 | break; | |
df44284e AM |
1038 | case bfd_reloc_outofrange: |
1039 | as_bad_where (fixp->fx_file, fixp->fx_line, | |
1040 | _("relocation out of range")); | |
1041 | break; | |
252b5132 | 1042 | default: |
df44284e AM |
1043 | as_fatal (_("%s:%u: bad return from bfd_install_relocation: %x"), |
1044 | fixp->fx_file, fixp->fx_line, s); | |
252b5132 | 1045 | } |
efaf0ba4 | 1046 | } |
252b5132 RH |
1047 | } |
1048 | n = i; | |
1049 | #endif | |
1050 | ||
1051 | #ifdef DEBUG4 | |
1052 | { | |
1053 | int i, j, nsyms; | |
1054 | asymbol **sympp; | |
1055 | sympp = bfd_get_outsymbols (stdoutput); | |
1056 | nsyms = bfd_get_symcount (stdoutput); | |
1057 | for (i = 0; i < n; i++) | |
1058 | if (((*relocs[i]->sym_ptr_ptr)->flags & BSF_SECTION_SYM) == 0) | |
1059 | { | |
1060 | for (j = 0; j < nsyms; j++) | |
1061 | if (sympp[j] == *relocs[i]->sym_ptr_ptr) | |
1062 | break; | |
1063 | if (j == nsyms) | |
1064 | abort (); | |
1065 | } | |
1066 | } | |
1067 | #endif | |
1068 | ||
1069 | if (n) | |
1070 | bfd_set_reloc (stdoutput, sec, relocs, n); | |
1071 | else | |
1072 | bfd_set_section_flags (abfd, sec, | |
1073 | (bfd_get_section_flags (abfd, sec) | |
1074 | & (flagword) ~SEC_RELOC)); | |
1075 | ||
945a1a6b ILT |
1076 | #ifdef SET_SECTION_RELOCS |
1077 | SET_SECTION_RELOCS (sec, relocs, n); | |
1078 | #endif | |
1079 | ||
252b5132 RH |
1080 | #ifdef DEBUG3 |
1081 | { | |
1082 | int i; | |
1083 | arelent *r; | |
1084 | asymbol *s; | |
1085 | fprintf (stderr, "relocs for sec %s\n", sec->name); | |
1086 | for (i = 0; i < n; i++) | |
1087 | { | |
1088 | r = relocs[i]; | |
1089 | s = *r->sym_ptr_ptr; | |
1090 | fprintf (stderr, " reloc %2d @%08x off %4x : sym %-10s addend %x\n", | |
1091 | i, r, r->address, s->name, r->addend); | |
1092 | } | |
1093 | } | |
1094 | #endif | |
1095 | } | |
1096 | ||
1097 | static void | |
d7342424 KH |
1098 | write_contents (bfd *abfd ATTRIBUTE_UNUSED, |
1099 | asection *sec, | |
1100 | PTR xxx ATTRIBUTE_UNUSED) | |
252b5132 RH |
1101 | { |
1102 | segment_info_type *seginfo = seg_info (sec); | |
685736be | 1103 | addressT offset = 0; |
252b5132 RH |
1104 | fragS *f; |
1105 | ||
1106 | /* Write out the frags. */ | |
1107 | if (seginfo == NULL | |
efaf0ba4 | 1108 | || !(bfd_get_section_flags (abfd, sec) & SEC_HAS_CONTENTS)) |
252b5132 RH |
1109 | return; |
1110 | ||
1111 | for (f = seginfo->frchainP->frch_root; | |
1112 | f; | |
1113 | f = f->fr_next) | |
1114 | { | |
1115 | int x; | |
685736be | 1116 | addressT fill_size; |
252b5132 | 1117 | char *fill_literal; |
685736be | 1118 | offsetT count; |
252b5132 RH |
1119 | |
1120 | assert (f->fr_type == rs_fill); | |
1121 | if (f->fr_fix) | |
1122 | { | |
1123 | x = bfd_set_section_contents (stdoutput, sec, | |
1124 | f->fr_literal, (file_ptr) offset, | |
1125 | (bfd_size_type) f->fr_fix); | |
b34976b6 | 1126 | if (!x) |
252b5132 RH |
1127 | { |
1128 | bfd_perror (stdoutput->filename); | |
1129 | as_perror (_("FATAL: Can't write %s"), stdoutput->filename); | |
1130 | exit (EXIT_FAILURE); | |
1131 | } | |
1132 | offset += f->fr_fix; | |
1133 | } | |
1134 | fill_literal = f->fr_literal + f->fr_fix; | |
1135 | fill_size = f->fr_var; | |
1136 | count = f->fr_offset; | |
1137 | assert (count >= 0); | |
1138 | if (fill_size && count) | |
1139 | { | |
1140 | char buf[256]; | |
efaf0ba4 | 1141 | if (fill_size > sizeof (buf)) |
252b5132 | 1142 | { |
efaf0ba4 | 1143 | /* Do it the old way. Can this ever happen? */ |
252b5132 RH |
1144 | while (count--) |
1145 | { | |
1146 | x = bfd_set_section_contents (stdoutput, sec, | |
1147 | fill_literal, | |
1148 | (file_ptr) offset, | |
1149 | (bfd_size_type) fill_size); | |
b34976b6 | 1150 | if (!x) |
252b5132 RH |
1151 | { |
1152 | bfd_perror (stdoutput->filename); | |
efaf0ba4 NC |
1153 | as_perror (_("FATAL: Can't write %s"), |
1154 | stdoutput->filename); | |
252b5132 RH |
1155 | exit (EXIT_FAILURE); |
1156 | } | |
1157 | offset += fill_size; | |
1158 | } | |
1159 | } | |
1160 | else | |
1161 | { | |
1162 | /* Build a buffer full of fill objects and output it as | |
1163 | often as necessary. This saves on the overhead of | |
1164 | potentially lots of bfd_set_section_contents calls. */ | |
1165 | int n_per_buf, i; | |
1166 | if (fill_size == 1) | |
1167 | { | |
1168 | n_per_buf = sizeof (buf); | |
1169 | memset (buf, *fill_literal, n_per_buf); | |
1170 | } | |
1171 | else | |
1172 | { | |
1173 | char *bufp; | |
efaf0ba4 | 1174 | n_per_buf = sizeof (buf) / fill_size; |
252b5132 | 1175 | for (i = n_per_buf, bufp = buf; i; i--, bufp += fill_size) |
efaf0ba4 | 1176 | memcpy (bufp, fill_literal, fill_size); |
252b5132 RH |
1177 | } |
1178 | for (; count > 0; count -= n_per_buf) | |
1179 | { | |
1180 | n_per_buf = n_per_buf > count ? count : n_per_buf; | |
efaf0ba4 NC |
1181 | x = bfd_set_section_contents |
1182 | (stdoutput, sec, buf, (file_ptr) offset, | |
1183 | (bfd_size_type) n_per_buf * fill_size); | |
b34976b6 | 1184 | if (!x) |
0e389e77 | 1185 | as_fatal (_("cannot write to output file")); |
252b5132 RH |
1186 | offset += n_per_buf * fill_size; |
1187 | } | |
1188 | } | |
1189 | } | |
1190 | } | |
1191 | } | |
1192 | #endif | |
1193 | ||
1194 | #if defined(BFD_ASSEMBLER) || (!defined (BFD) && !defined(OBJ_AOUT)) | |
1195 | static void | |
d7342424 | 1196 | merge_data_into_text (void) |
252b5132 RH |
1197 | { |
1198 | #if defined(BFD_ASSEMBLER) || defined(MANY_SEGMENTS) | |
1199 | seg_info (text_section)->frchainP->frch_last->fr_next = | |
1200 | seg_info (data_section)->frchainP->frch_root; | |
1201 | seg_info (text_section)->frchainP->frch_last = | |
1202 | seg_info (data_section)->frchainP->frch_last; | |
1203 | seg_info (data_section)->frchainP = 0; | |
1204 | #else | |
1205 | fixS *tmp; | |
1206 | ||
1207 | text_last_frag->fr_next = data_frag_root; | |
1208 | text_last_frag = data_last_frag; | |
1209 | data_last_frag = NULL; | |
1210 | data_frag_root = NULL; | |
1211 | if (text_fix_root) | |
1212 | { | |
1213 | for (tmp = text_fix_root; tmp->fx_next; tmp = tmp->fx_next);; | |
1214 | tmp->fx_next = data_fix_root; | |
1215 | text_fix_tail = data_fix_tail; | |
1216 | } | |
1217 | else | |
1218 | text_fix_root = data_fix_root; | |
1219 | data_fix_root = NULL; | |
1220 | #endif | |
1221 | } | |
efaf0ba4 | 1222 | #endif /* BFD_ASSEMBLER || (! BFD && ! OBJ_AOUT) */ |
252b5132 RH |
1223 | |
1224 | #if !defined (BFD_ASSEMBLER) && !defined (BFD) | |
1225 | static void | |
1226 | relax_and_size_all_segments () | |
1227 | { | |
1228 | fragS *fragP; | |
1229 | ||
1230 | relax_segment (text_frag_root, SEG_TEXT); | |
1231 | relax_segment (data_frag_root, SEG_DATA); | |
1232 | relax_segment (bss_frag_root, SEG_BSS); | |
252b5132 | 1233 | |
efaf0ba4 | 1234 | /* Now the addresses of frags are correct within the segment. */ |
252b5132 RH |
1235 | know (text_last_frag->fr_type == rs_fill && text_last_frag->fr_offset == 0); |
1236 | H_SET_TEXT_SIZE (&headers, text_last_frag->fr_address); | |
1237 | text_last_frag->fr_address = H_GET_TEXT_SIZE (&headers); | |
1238 | ||
efaf0ba4 NC |
1239 | /* Join the 2 segments into 1 huge segment. |
1240 | To do this, re-compute every rn_address in the SEG_DATA frags. | |
1241 | Then join the data frags after the text frags. | |
58a77e41 | 1242 | |
efaf0ba4 | 1243 | Determine a_data [length of data segment]. */ |
252b5132 RH |
1244 | if (data_frag_root) |
1245 | { | |
1246 | register relax_addressT slide; | |
1247 | ||
efaf0ba4 NC |
1248 | know ((text_last_frag->fr_type == rs_fill) |
1249 | && (text_last_frag->fr_offset == 0)); | |
252b5132 RH |
1250 | |
1251 | H_SET_DATA_SIZE (&headers, data_last_frag->fr_address); | |
1252 | data_last_frag->fr_address = H_GET_DATA_SIZE (&headers); | |
efaf0ba4 | 1253 | slide = H_GET_TEXT_SIZE (&headers); /* & in file of the data segment. */ |
252b5132 RH |
1254 | #ifdef OBJ_BOUT |
1255 | #define RoundUp(N,S) (((N)+(S)-1)&-(S)) | |
1256 | /* For b.out: If the data section has a strict alignment | |
1257 | requirement, its load address in the .o file will be | |
1258 | rounded up from the size of the text section. These | |
1259 | two values are *not* the same! Similarly for the bss | |
1260 | section.... */ | |
1261 | slide = RoundUp (slide, 1 << section_alignment[SEG_DATA]); | |
1262 | #endif | |
1263 | ||
1264 | for (fragP = data_frag_root; fragP; fragP = fragP->fr_next) | |
efaf0ba4 | 1265 | fragP->fr_address += slide; |
252b5132 RH |
1266 | |
1267 | know (text_last_frag != 0); | |
1268 | text_last_frag->fr_next = data_frag_root; | |
1269 | } | |
1270 | else | |
1271 | { | |
1272 | H_SET_DATA_SIZE (&headers, 0); | |
1273 | } | |
1274 | ||
1275 | #ifdef OBJ_BOUT | |
1276 | /* See above comments on b.out data section address. */ | |
1277 | { | |
685736be | 1278 | addressT bss_vma; |
252b5132 RH |
1279 | if (data_last_frag == 0) |
1280 | bss_vma = H_GET_TEXT_SIZE (&headers); | |
1281 | else | |
1282 | bss_vma = data_last_frag->fr_address; | |
1283 | bss_vma = RoundUp (bss_vma, 1 << section_alignment[SEG_BSS]); | |
1284 | bss_address_frag.fr_address = bss_vma; | |
1285 | } | |
efaf0ba4 | 1286 | #else /* ! OBJ_BOUT */ |
252b5132 RH |
1287 | bss_address_frag.fr_address = (H_GET_TEXT_SIZE (&headers) + |
1288 | H_GET_DATA_SIZE (&headers)); | |
1289 | ||
efaf0ba4 | 1290 | #endif /* ! OBJ_BOUT */ |
252b5132 | 1291 | |
efaf0ba4 | 1292 | /* Slide all the frags. */ |
252b5132 RH |
1293 | if (bss_frag_root) |
1294 | { | |
1295 | relax_addressT slide = bss_address_frag.fr_address; | |
1296 | ||
1297 | for (fragP = bss_frag_root; fragP; fragP = fragP->fr_next) | |
efaf0ba4 | 1298 | fragP->fr_address += slide; |
252b5132 RH |
1299 | } |
1300 | ||
1301 | if (bss_last_frag) | |
1302 | H_SET_BSS_SIZE (&headers, | |
1303 | bss_last_frag->fr_address - bss_frag_root->fr_address); | |
1304 | else | |
1305 | H_SET_BSS_SIZE (&headers, 0); | |
1306 | } | |
efaf0ba4 | 1307 | #endif /* ! BFD_ASSEMBLER && ! BFD */ |
252b5132 RH |
1308 | |
1309 | #if defined (BFD_ASSEMBLER) || !defined (BFD) | |
1310 | ||
1311 | #ifdef BFD_ASSEMBLER | |
1312 | static void | |
d7342424 | 1313 | set_symtab (void) |
252b5132 RH |
1314 | { |
1315 | int nsyms; | |
1316 | asymbol **asympp; | |
1317 | symbolS *symp; | |
b34976b6 | 1318 | bfd_boolean result; |
d7342424 | 1319 | extern PTR bfd_alloc (bfd *, bfd_size_type); |
252b5132 RH |
1320 | |
1321 | /* Count symbols. We can't rely on a count made by the loop in | |
1322 | write_object_file, because *_frob_file may add a new symbol or | |
1323 | two. */ | |
1324 | nsyms = 0; | |
1325 | for (symp = symbol_rootP; symp; symp = symbol_next (symp)) | |
1326 | nsyms++; | |
1327 | ||
1328 | if (nsyms) | |
1329 | { | |
1330 | int i; | |
0e1a166b | 1331 | bfd_size_type amt = (bfd_size_type) nsyms * sizeof (asymbol *); |
252b5132 | 1332 | |
0e1a166b | 1333 | asympp = (asymbol **) bfd_alloc (stdoutput, amt); |
252b5132 RH |
1334 | symp = symbol_rootP; |
1335 | for (i = 0; i < nsyms; i++, symp = symbol_next (symp)) | |
1336 | { | |
49309057 ILT |
1337 | asympp[i] = symbol_get_bfdsym (symp); |
1338 | symbol_mark_written (symp); | |
252b5132 RH |
1339 | } |
1340 | } | |
1341 | else | |
1342 | asympp = 0; | |
1343 | result = bfd_set_symtab (stdoutput, asympp, nsyms); | |
b34976b6 | 1344 | assert (result); |
252b5132 RH |
1345 | symbol_table_frozen = 1; |
1346 | } | |
1347 | #endif | |
1348 | ||
1349 | /* Finish the subsegments. After every sub-segment, we fake an | |
1350 | ".align ...". This conforms to BSD4.2 brane-damage. We then fake | |
1351 | ".fill 0" because that is the kind of frag that requires least | |
1352 | thought. ".align" frags like to have a following frag since that | |
1353 | makes calculating their intended length trivial. */ | |
1354 | ||
1355 | #ifndef SUB_SEGMENT_ALIGN | |
18e1d487 | 1356 | #ifdef HANDLE_ALIGN |
436d9e46 | 1357 | /* The last subsegment gets an alignment corresponding to the alignment |
18e1d487 AM |
1358 | of the section. This allows proper nop-filling at the end of |
1359 | code-bearing sections. */ | |
1360 | #define SUB_SEGMENT_ALIGN(SEG, FRCHAIN) \ | |
1361 | (!(FRCHAIN)->frch_next || (FRCHAIN)->frch_next->frch_seg != (SEG) \ | |
1362 | ? get_recorded_alignment (SEG) : 0) | |
1363 | #else | |
252b5132 | 1364 | #ifdef BFD_ASSEMBLER |
18e1d487 | 1365 | #define SUB_SEGMENT_ALIGN(SEG, FRCHAIN) 0 |
252b5132 | 1366 | #else |
18e1d487 AM |
1367 | #define SUB_SEGMENT_ALIGN(SEG, FRCHAIN) 2 |
1368 | #endif | |
252b5132 RH |
1369 | #endif |
1370 | #endif | |
1371 | ||
1372 | void | |
d7342424 | 1373 | subsegs_finish (void) |
252b5132 RH |
1374 | { |
1375 | struct frchain *frchainP; | |
1376 | ||
1377 | for (frchainP = frchain_root; frchainP; frchainP = frchainP->frch_next) | |
1378 | { | |
18e1d487 | 1379 | int alignment = 0; |
0a9ef439 | 1380 | |
252b5132 RH |
1381 | subseg_set (frchainP->frch_seg, frchainP->frch_subseg); |
1382 | ||
1383 | /* This now gets called even if we had errors. In that case, | |
1384 | any alignment is meaningless, and, moreover, will look weird | |
1385 | if we are generating a listing. */ | |
18e1d487 | 1386 | if (!had_errors ()) |
381a1ab3 JJ |
1387 | { |
1388 | alignment = SUB_SEGMENT_ALIGN (now_seg, frchainP); | |
1389 | #ifdef BFD_ASSEMBLER | |
1390 | if ((bfd_get_section_flags (now_seg->owner, now_seg) & SEC_MERGE) | |
1391 | && now_seg->entsize) | |
1392 | { | |
1393 | unsigned int entsize = now_seg->entsize; | |
1394 | int entalign = 0; | |
1395 | ||
1396 | while ((entsize & 1) == 0) | |
1397 | { | |
1398 | ++entalign; | |
1399 | entsize >>= 1; | |
1400 | } | |
1401 | if (entalign > alignment) | |
1402 | alignment = entalign; | |
1403 | } | |
1404 | #endif | |
1405 | } | |
0a9ef439 | 1406 | |
799051fc RH |
1407 | if (subseg_text_p (now_seg)) |
1408 | frag_align_code (alignment, 0); | |
1409 | else | |
1410 | frag_align (alignment, 0, 0); | |
252b5132 RH |
1411 | |
1412 | /* frag_align will have left a new frag. | |
1413 | Use this last frag for an empty ".fill". | |
1414 | ||
1415 | For this segment ... | |
1416 | Create a last frag. Do not leave a "being filled in frag". */ | |
252b5132 RH |
1417 | frag_wane (frag_now); |
1418 | frag_now->fr_fix = 0; | |
1419 | know (frag_now->fr_next == NULL); | |
1420 | } | |
1421 | } | |
1422 | ||
1423 | /* Write the object file. */ | |
1424 | ||
1425 | void | |
d7342424 | 1426 | write_object_file (void) |
252b5132 RH |
1427 | { |
1428 | #if ! defined (BFD_ASSEMBLER) || ! defined (WORKING_DOT_WORD) | |
efaf0ba4 | 1429 | fragS *fragP; /* Track along all frags. */ |
252b5132 RH |
1430 | #endif |
1431 | ||
1432 | /* Do we really want to write it? */ | |
1433 | { | |
1434 | int n_warns, n_errs; | |
1435 | n_warns = had_warnings (); | |
1436 | n_errs = had_errors (); | |
1437 | /* The -Z flag indicates that an object file should be generated, | |
1438 | regardless of warnings and errors. */ | |
1439 | if (flag_always_generate_output) | |
1440 | { | |
1441 | if (n_warns || n_errs) | |
0e389e77 | 1442 | as_warn (_("%d error%s, %d warning%s, generating bad object file"), |
252b5132 RH |
1443 | n_errs, n_errs == 1 ? "" : "s", |
1444 | n_warns, n_warns == 1 ? "" : "s"); | |
1445 | } | |
1446 | else | |
1447 | { | |
1448 | if (n_errs) | |
0e389e77 | 1449 | as_fatal (_("%d error%s, %d warning%s, no object file generated"), |
252b5132 RH |
1450 | n_errs, n_errs == 1 ? "" : "s", |
1451 | n_warns, n_warns == 1 ? "" : "s"); | |
1452 | } | |
1453 | } | |
1454 | ||
1455 | #ifdef OBJ_VMS | |
1456 | /* Under VMS we try to be compatible with VAX-11 "C". Thus, we call | |
1457 | a routine to check for the definition of the procedure "_main", | |
efaf0ba4 | 1458 | and if so -- fix it up so that it can be program entry point. */ |
252b5132 | 1459 | vms_check_for_main (); |
efaf0ba4 | 1460 | #endif /* OBJ_VMS */ |
252b5132 RH |
1461 | |
1462 | /* From now on, we don't care about sub-segments. Build one frag chain | |
1463 | for each segment. Linked thru fr_next. */ | |
1464 | ||
1465 | #ifdef BFD_ASSEMBLER | |
1466 | /* Remove the sections created by gas for its own purposes. */ | |
1467 | { | |
7c6beb69 | 1468 | asection **seclist; |
252b5132 RH |
1469 | int i; |
1470 | ||
1471 | seclist = &stdoutput->sections; | |
7c6beb69 | 1472 | while (*seclist) |
252b5132 | 1473 | { |
7c6beb69 | 1474 | if (*seclist == reg_section || *seclist == expr_section) |
252b5132 | 1475 | { |
7c6beb69 | 1476 | bfd_section_list_remove (stdoutput, seclist); |
252b5132 | 1477 | stdoutput->section_count--; |
252b5132 | 1478 | } |
7c6beb69 | 1479 | else |
252b5132 RH |
1480 | seclist = &(*seclist)->next; |
1481 | } | |
1482 | i = 0; | |
1483 | bfd_map_over_sections (stdoutput, renumber_sections, &i); | |
1484 | } | |
1485 | ||
1486 | bfd_map_over_sections (stdoutput, chain_frchains_together, (char *) 0); | |
1487 | #else | |
1488 | remove_subsegs (frchain_root, SEG_TEXT, &text_frag_root, &text_last_frag); | |
1489 | remove_subsegs (data0_frchainP, SEG_DATA, &data_frag_root, &data_last_frag); | |
1490 | remove_subsegs (bss0_frchainP, SEG_BSS, &bss_frag_root, &bss_last_frag); | |
1491 | #endif | |
1492 | ||
1493 | /* We have two segments. If user gave -R flag, then we must put the | |
1494 | data frags into the text segment. Do this before relaxing so | |
1495 | we know to take advantage of -R and make shorter addresses. */ | |
1496 | #if !defined (OBJ_AOUT) || defined (BFD_ASSEMBLER) | |
1497 | if (flag_readonly_data_in_text) | |
1498 | { | |
1499 | merge_data_into_text (); | |
1500 | } | |
1501 | #endif | |
1502 | ||
1503 | #ifdef BFD_ASSEMBLER | |
e46d99eb AM |
1504 | while (1) |
1505 | { | |
1506 | int changed; | |
1507 | ||
aacb5251 HPN |
1508 | #ifndef WORKING_DOT_WORD |
1509 | /* We need to reset the markers in the broken word list and | |
1510 | associated frags between calls to relax_segment (via | |
1511 | relax_seg). Since the broken word list is global, we do it | |
1512 | once per round, rather than locally in relax_segment for each | |
1513 | segment. */ | |
1514 | struct broken_word *brokp; | |
1515 | ||
1516 | for (brokp = broken_words; | |
1517 | brokp != (struct broken_word *) NULL; | |
1518 | brokp = brokp->next_broken_word) | |
1519 | { | |
1520 | brokp->added = 0; | |
1521 | ||
1522 | if (brokp->dispfrag != (fragS *) NULL | |
1523 | && brokp->dispfrag->fr_type == rs_broken_word) | |
1524 | brokp->dispfrag->fr_subtype = 0; | |
1525 | } | |
1526 | #endif | |
1527 | ||
e46d99eb AM |
1528 | changed = 0; |
1529 | bfd_map_over_sections (stdoutput, relax_seg, &changed); | |
1530 | if (!changed) | |
1531 | break; | |
1532 | } | |
e027f3e8 | 1533 | |
87548816 NC |
1534 | /* Note - Most ports will use the default value of |
1535 | TC_FINALIZE_SYMS_BEFORE_SIZE_SEG, which 1. This will force | |
1536 | local symbols to be resolved, removing their frag information. | |
1537 | Some ports however, will not have finished relaxing all of | |
1538 | their frags and will still need the local symbol frag | |
1539 | information. These ports can set | |
1540 | TC_FINALIZE_SYMS_BEFORE_SIZE_SEG to 0. */ | |
1541 | finalize_syms = TC_FINALIZE_SYMS_BEFORE_SIZE_SEG; | |
1542 | ||
e46d99eb | 1543 | bfd_map_over_sections (stdoutput, size_seg, (char *) 0); |
252b5132 RH |
1544 | #else |
1545 | relax_and_size_all_segments (); | |
e027f3e8 | 1546 | #endif /* BFD_ASSEMBLER */ |
e46d99eb | 1547 | |
38b87a1b NC |
1548 | /* Relaxation has completed. Freeze all syms. */ |
1549 | finalize_syms = 1; | |
1550 | ||
e0001a05 NC |
1551 | #ifdef md_post_relax_hook |
1552 | md_post_relax_hook; | |
1553 | #endif | |
1554 | ||
252b5132 | 1555 | #ifndef BFD_ASSEMBLER |
efaf0ba4 | 1556 | /* Crawl the symbol chain. |
58a77e41 | 1557 | |
efaf0ba4 NC |
1558 | For each symbol whose value depends on a frag, take the address of |
1559 | that frag and subsume it into the value of the symbol. | |
1560 | After this, there is just one way to lookup a symbol value. | |
1561 | Values are left in their final state for object file emission. | |
1562 | We adjust the values of 'L' local symbols, even if we do | |
1563 | not intend to emit them to the object file, because their values | |
1564 | are needed for fix-ups. | |
58a77e41 | 1565 | |
efaf0ba4 NC |
1566 | Unless we saw a -L flag, remove all symbols that begin with 'L' |
1567 | from the symbol chain. (They are still pointed to by the fixes.) | |
58a77e41 | 1568 | |
efaf0ba4 NC |
1569 | Count the remaining symbols. |
1570 | Assign a symbol number to each symbol. | |
1571 | Count the number of string-table chars we will emit. | |
1572 | Put this info into the headers as appropriate. */ | |
252b5132 RH |
1573 | know (zero_address_frag.fr_address == 0); |
1574 | string_byte_count = sizeof (string_byte_count); | |
1575 | ||
1576 | obj_crawl_symbol_chain (&headers); | |
1577 | ||
1578 | if (string_byte_count == sizeof (string_byte_count)) | |
1579 | string_byte_count = 0; | |
1580 | ||
1581 | H_SET_STRING_SIZE (&headers, string_byte_count); | |
1582 | ||
efaf0ba4 NC |
1583 | /* Addresses of frags now reflect addresses we use in the object file. |
1584 | Symbol values are correct. | |
1585 | Scan the frags, converting any ".org"s and ".align"s to ".fill"s. | |
1586 | Also converting any machine-dependent frags using md_convert_frag(); */ | |
252b5132 RH |
1587 | subseg_change (SEG_TEXT, 0); |
1588 | ||
1589 | for (fragP = text_frag_root; fragP; fragP = fragP->fr_next) | |
1590 | { | |
1591 | /* At this point we have linked all the frags into a single | |
1592 | chain. However, cvt_frag_to_fill may call md_convert_frag | |
1593 | which may call fix_new. We need to ensure that fix_new adds | |
1594 | the fixup to the right section. */ | |
1595 | if (fragP == data_frag_root) | |
1596 | subseg_change (SEG_DATA, 0); | |
1597 | ||
1598 | cvt_frag_to_fill (&headers, SEG_TEXT, fragP); | |
1599 | ||
1600 | /* Some assert macros don't work with # directives mixed in. */ | |
1601 | #ifndef NDEBUG | |
1602 | if (!(fragP->fr_next == NULL | |
1603 | #ifdef OBJ_BOUT | |
1604 | || fragP->fr_next == data_frag_root | |
1605 | #endif | |
17fc154e | 1606 | || ((offsetT) (fragP->fr_next->fr_address - fragP->fr_address) |
252b5132 RH |
1607 | == (fragP->fr_fix + fragP->fr_offset * fragP->fr_var)))) |
1608 | abort (); | |
1609 | #endif | |
1610 | } | |
efaf0ba4 | 1611 | #endif /* ! BFD_ASSEMBLER */ |
252b5132 RH |
1612 | |
1613 | #ifndef WORKING_DOT_WORD | |
1614 | { | |
1615 | struct broken_word *lie; | |
1616 | struct broken_word **prevP; | |
1617 | ||
1618 | prevP = &broken_words; | |
1619 | for (lie = broken_words; lie; lie = lie->next_broken_word) | |
1620 | if (!lie->added) | |
1621 | { | |
1622 | expressionS exp; | |
1623 | ||
1624 | subseg_change (lie->seg, lie->subseg); | |
1625 | exp.X_op = O_subtract; | |
1626 | exp.X_add_symbol = lie->add; | |
1627 | exp.X_op_symbol = lie->sub; | |
1628 | exp.X_add_number = lie->addnum; | |
1629 | #ifdef BFD_ASSEMBLER | |
1630 | #ifdef TC_CONS_FIX_NEW | |
1631 | TC_CONS_FIX_NEW (lie->frag, | |
efaf0ba4 NC |
1632 | lie->word_goes_here - lie->frag->fr_literal, |
1633 | 2, &exp); | |
252b5132 RH |
1634 | #else |
1635 | fix_new_exp (lie->frag, | |
1636 | lie->word_goes_here - lie->frag->fr_literal, | |
1637 | 2, &exp, 0, BFD_RELOC_16); | |
1638 | #endif | |
1639 | #else | |
1640 | #if defined(TC_SPARC) || defined(TC_A29K) || defined(NEED_FX_R_TYPE) | |
1641 | fix_new_exp (lie->frag, | |
1642 | lie->word_goes_here - lie->frag->fr_literal, | |
1643 | 2, &exp, 0, NO_RELOC); | |
1644 | #else | |
1645 | #ifdef TC_NS32K | |
1646 | fix_new_ns32k_exp (lie->frag, | |
1647 | lie->word_goes_here - lie->frag->fr_literal, | |
1648 | 2, &exp, 0, 0, 2, 0, 0); | |
1649 | #else | |
1650 | fix_new_exp (lie->frag, | |
1651 | lie->word_goes_here - lie->frag->fr_literal, | |
1652 | 2, &exp, 0, 0); | |
efaf0ba4 NC |
1653 | #endif /* TC_NS32K */ |
1654 | #endif /* TC_SPARC|TC_A29K|NEED_FX_R_TYPE */ | |
1655 | #endif /* BFD_ASSEMBLER */ | |
252b5132 RH |
1656 | *prevP = lie->next_broken_word; |
1657 | } | |
1658 | else | |
1659 | prevP = &(lie->next_broken_word); | |
1660 | ||
1661 | for (lie = broken_words; lie;) | |
1662 | { | |
1663 | struct broken_word *untruth; | |
1664 | char *table_ptr; | |
1665 | addressT table_addr; | |
1666 | addressT from_addr, to_addr; | |
1667 | int n, m; | |
1668 | ||
1669 | subseg_change (lie->seg, lie->subseg); | |
1670 | fragP = lie->dispfrag; | |
1671 | ||
1672 | /* Find out how many broken_words go here. */ | |
1673 | n = 0; | |
efaf0ba4 NC |
1674 | for (untruth = lie; |
1675 | untruth && untruth->dispfrag == fragP; | |
1676 | untruth = untruth->next_broken_word) | |
252b5132 RH |
1677 | if (untruth->added == 1) |
1678 | n++; | |
1679 | ||
1680 | table_ptr = lie->dispfrag->fr_opcode; | |
efaf0ba4 NC |
1681 | table_addr = (lie->dispfrag->fr_address |
1682 | + (table_ptr - lie->dispfrag->fr_literal)); | |
252b5132 RH |
1683 | /* Create the jump around the long jumps. This is a short |
1684 | jump from table_ptr+0 to table_ptr+n*long_jump_size. */ | |
1685 | from_addr = table_addr; | |
1686 | to_addr = table_addr + md_short_jump_size + n * md_long_jump_size; | |
efaf0ba4 NC |
1687 | md_create_short_jump (table_ptr, from_addr, to_addr, lie->dispfrag, |
1688 | lie->add); | |
252b5132 RH |
1689 | table_ptr += md_short_jump_size; |
1690 | table_addr += md_short_jump_size; | |
1691 | ||
efaf0ba4 NC |
1692 | for (m = 0; |
1693 | lie && lie->dispfrag == fragP; | |
1694 | m++, lie = lie->next_broken_word) | |
252b5132 RH |
1695 | { |
1696 | if (lie->added == 2) | |
1697 | continue; | |
efaf0ba4 NC |
1698 | /* Patch the jump table. */ |
1699 | /* This is the offset from ??? to table_ptr+0. */ | |
252b5132 | 1700 | to_addr = table_addr - S_GET_VALUE (lie->sub); |
753f6b12 HPN |
1701 | #ifdef TC_CHECK_ADJUSTED_BROKEN_DOT_WORD |
1702 | TC_CHECK_ADJUSTED_BROKEN_DOT_WORD (to_addr, lie); | |
252b5132 RH |
1703 | #endif |
1704 | md_number_to_chars (lie->word_goes_here, to_addr, 2); | |
efaf0ba4 NC |
1705 | for (untruth = lie->next_broken_word; |
1706 | untruth && untruth->dispfrag == fragP; | |
1707 | untruth = untruth->next_broken_word) | |
252b5132 RH |
1708 | { |
1709 | if (untruth->use_jump == lie) | |
1710 | md_number_to_chars (untruth->word_goes_here, to_addr, 2); | |
1711 | } | |
1712 | ||
efaf0ba4 NC |
1713 | /* Install the long jump. */ |
1714 | /* This is a long jump from table_ptr+0 to the final target. */ | |
252b5132 RH |
1715 | from_addr = table_addr; |
1716 | to_addr = S_GET_VALUE (lie->add) + lie->addnum; | |
efaf0ba4 NC |
1717 | md_create_long_jump (table_ptr, from_addr, to_addr, lie->dispfrag, |
1718 | lie->add); | |
252b5132 RH |
1719 | table_ptr += md_long_jump_size; |
1720 | table_addr += md_long_jump_size; | |
1721 | } | |
1722 | } | |
1723 | } | |
efaf0ba4 | 1724 | #endif /* not WORKING_DOT_WORD */ |
252b5132 RH |
1725 | |
1726 | #ifndef BFD_ASSEMBLER | |
1727 | #ifndef OBJ_VMS | |
efaf0ba4 | 1728 | { /* not vms */ |
252b5132 RH |
1729 | char *the_object_file; |
1730 | long object_file_size; | |
efaf0ba4 NC |
1731 | /* Scan every FixS performing fixups. We had to wait until now to |
1732 | do this because md_convert_frag() may have made some fixSs. */ | |
252b5132 RH |
1733 | int trsize, drsize; |
1734 | ||
1735 | subseg_change (SEG_TEXT, 0); | |
1736 | trsize = md_reloc_size * fixup_segment (text_fix_root, SEG_TEXT); | |
1737 | subseg_change (SEG_DATA, 0); | |
1738 | drsize = md_reloc_size * fixup_segment (data_fix_root, SEG_DATA); | |
1739 | H_SET_RELOCATION_SIZE (&headers, trsize, drsize); | |
1740 | ||
efaf0ba4 | 1741 | /* FIXME: Move this stuff into the pre-write-hook. */ |
252b5132 RH |
1742 | H_SET_MAGIC_NUMBER (&headers, magic_number_for_object_file); |
1743 | H_SET_ENTRY_POINT (&headers, 0); | |
1744 | ||
efaf0ba4 | 1745 | obj_pre_write_hook (&headers); /* Extra coff stuff. */ |
252b5132 RH |
1746 | |
1747 | object_file_size = H_GET_FILE_SIZE (&headers); | |
1748 | next_object_file_charP = the_object_file = xmalloc (object_file_size); | |
1749 | ||
1750 | output_file_create (out_file_name); | |
1751 | ||
1752 | obj_header_append (&next_object_file_charP, &headers); | |
1753 | ||
efaf0ba4 NC |
1754 | know ((next_object_file_charP - the_object_file) |
1755 | == H_GET_HEADER_SIZE (&headers)); | |
252b5132 | 1756 | |
efaf0ba4 | 1757 | /* Emit code. */ |
252b5132 RH |
1758 | for (fragP = text_frag_root; fragP; fragP = fragP->fr_next) |
1759 | { | |
1760 | register long count; | |
1761 | register char *fill_literal; | |
1762 | register long fill_size; | |
1763 | ||
1764 | PROGRESS (1); | |
1765 | know (fragP->fr_type == rs_fill); | |
efaf0ba4 NC |
1766 | append (&next_object_file_charP, fragP->fr_literal, |
1767 | (unsigned long) fragP->fr_fix); | |
252b5132 RH |
1768 | fill_literal = fragP->fr_literal + fragP->fr_fix; |
1769 | fill_size = fragP->fr_var; | |
1770 | know (fragP->fr_offset >= 0); | |
1771 | ||
1772 | for (count = fragP->fr_offset; count; count--) | |
efaf0ba4 NC |
1773 | append (&next_object_file_charP, fill_literal, |
1774 | (unsigned long) fill_size); | |
1775 | } | |
252b5132 | 1776 | |
efaf0ba4 NC |
1777 | know ((next_object_file_charP - the_object_file) |
1778 | == (H_GET_HEADER_SIZE (&headers) | |
1779 | + H_GET_TEXT_SIZE (&headers) | |
1780 | + H_GET_DATA_SIZE (&headers))); | |
1781 | ||
1782 | /* Emit relocations. */ | |
1783 | obj_emit_relocations (&next_object_file_charP, text_fix_root, | |
1784 | (relax_addressT) 0); | |
1785 | know ((next_object_file_charP - the_object_file) | |
1786 | == (H_GET_HEADER_SIZE (&headers) | |
1787 | + H_GET_TEXT_SIZE (&headers) | |
1788 | + H_GET_DATA_SIZE (&headers) | |
1789 | + H_GET_TEXT_RELOCATION_SIZE (&headers))); | |
252b5132 RH |
1790 | #ifdef TC_I960 |
1791 | /* Make addresses in data relocation directives relative to beginning of | |
efaf0ba4 NC |
1792 | first data fragment, not end of last text fragment: alignment of the |
1793 | start of the data segment may place a gap between the segments. */ | |
1794 | obj_emit_relocations (&next_object_file_charP, data_fix_root, | |
1795 | data0_frchainP->frch_root->fr_address); | |
1796 | #else /* TC_I960 */ | |
1797 | obj_emit_relocations (&next_object_file_charP, data_fix_root, | |
1798 | text_last_frag->fr_address); | |
1799 | #endif /* TC_I960 */ | |
1800 | ||
1801 | know ((next_object_file_charP - the_object_file) | |
1802 | == (H_GET_HEADER_SIZE (&headers) | |
1803 | + H_GET_TEXT_SIZE (&headers) | |
1804 | + H_GET_DATA_SIZE (&headers) | |
1805 | + H_GET_TEXT_RELOCATION_SIZE (&headers) | |
1806 | + H_GET_DATA_RELOCATION_SIZE (&headers))); | |
1807 | ||
1808 | /* Emit line number entries. */ | |
252b5132 | 1809 | OBJ_EMIT_LINENO (&next_object_file_charP, lineno_rootP, the_object_file); |
efaf0ba4 NC |
1810 | know ((next_object_file_charP - the_object_file) |
1811 | == (H_GET_HEADER_SIZE (&headers) | |
1812 | + H_GET_TEXT_SIZE (&headers) | |
1813 | + H_GET_DATA_SIZE (&headers) | |
1814 | + H_GET_TEXT_RELOCATION_SIZE (&headers) | |
1815 | + H_GET_DATA_RELOCATION_SIZE (&headers) | |
1816 | + H_GET_LINENO_SIZE (&headers))); | |
1817 | ||
1818 | /* Emit symbols. */ | |
252b5132 | 1819 | obj_emit_symbols (&next_object_file_charP, symbol_rootP); |
efaf0ba4 NC |
1820 | know ((next_object_file_charP - the_object_file) |
1821 | == (H_GET_HEADER_SIZE (&headers) | |
1822 | + H_GET_TEXT_SIZE (&headers) | |
1823 | + H_GET_DATA_SIZE (&headers) | |
1824 | + H_GET_TEXT_RELOCATION_SIZE (&headers) | |
1825 | + H_GET_DATA_RELOCATION_SIZE (&headers) | |
1826 | + H_GET_LINENO_SIZE (&headers) | |
1827 | + H_GET_SYMBOL_TABLE_SIZE (&headers))); | |
1828 | ||
1829 | /* Emit strings. */ | |
252b5132 | 1830 | if (string_byte_count > 0) |
efaf0ba4 | 1831 | obj_emit_strings (&next_object_file_charP); |
252b5132 RH |
1832 | |
1833 | #ifdef BFD_HEADERS | |
0e1a166b AM |
1834 | bfd_seek (stdoutput, (file_ptr) 0, 0); |
1835 | bfd_bwrite (the_object_file, (bfd_size_type) object_file_size, stdoutput); | |
252b5132 RH |
1836 | #else |
1837 | ||
efaf0ba4 | 1838 | /* Write the data to the file. */ |
252b5132 RH |
1839 | output_file_append (the_object_file, object_file_size, out_file_name); |
1840 | free (the_object_file); | |
1841 | #endif | |
efaf0ba4 NC |
1842 | } |
1843 | #else /* OBJ_VMS */ | |
1844 | /* Now do the VMS-dependent part of writing the object file. */ | |
252b5132 RH |
1845 | vms_write_object_file (H_GET_TEXT_SIZE (&headers), |
1846 | H_GET_DATA_SIZE (&headers), | |
1847 | H_GET_BSS_SIZE (&headers), | |
1848 | text_frag_root, data_frag_root); | |
efaf0ba4 NC |
1849 | #endif /* OBJ_VMS */ |
1850 | #else /* BFD_ASSEMBLER */ | |
252b5132 RH |
1851 | |
1852 | /* Resolve symbol values. This needs to be done before processing | |
1853 | the relocations. */ | |
1854 | if (symbol_rootP) | |
1855 | { | |
1856 | symbolS *symp; | |
1857 | ||
1858 | for (symp = symbol_rootP; symp; symp = symbol_next (symp)) | |
6386f3a7 | 1859 | resolve_symbol_value (symp); |
252b5132 | 1860 | } |
49309057 | 1861 | resolve_local_symbol_values (); |
252b5132 RH |
1862 | |
1863 | PROGRESS (1); | |
1864 | ||
1865 | #ifdef tc_frob_file_before_adjust | |
1866 | tc_frob_file_before_adjust (); | |
1867 | #endif | |
1868 | #ifdef obj_frob_file_before_adjust | |
1869 | obj_frob_file_before_adjust (); | |
1870 | #endif | |
1871 | ||
efaf0ba4 | 1872 | bfd_map_over_sections (stdoutput, adjust_reloc_syms, (char *) 0); |
252b5132 | 1873 | |
a161fe53 AM |
1874 | #ifdef tc_frob_file_before_fix |
1875 | tc_frob_file_before_fix (); | |
1876 | #endif | |
1877 | #ifdef obj_frob_file_before_fix | |
1878 | obj_frob_file_before_fix (); | |
1879 | #endif | |
1880 | ||
1881 | bfd_map_over_sections (stdoutput, fix_segment, (char *) 0); | |
1882 | ||
252b5132 RH |
1883 | /* Set up symbol table, and write it out. */ |
1884 | if (symbol_rootP) | |
1885 | { | |
1886 | symbolS *symp; | |
1887 | ||
1888 | for (symp = symbol_rootP; symp; symp = symbol_next (symp)) | |
1889 | { | |
1890 | int punt = 0; | |
1891 | const char *name; | |
1892 | ||
49309057 | 1893 | if (symbol_mri_common_p (symp)) |
252b5132 RH |
1894 | { |
1895 | if (S_IS_EXTERNAL (symp)) | |
1896 | as_bad (_("%s: global symbols not supported in common sections"), | |
1897 | S_GET_NAME (symp)); | |
1898 | symbol_remove (symp, &symbol_rootP, &symbol_lastP); | |
1899 | continue; | |
1900 | } | |
1901 | ||
1902 | name = S_GET_NAME (symp); | |
1903 | if (name) | |
1904 | { | |
efaf0ba4 NC |
1905 | const char *name2 = |
1906 | decode_local_label_name ((char *) S_GET_NAME (symp)); | |
252b5132 RH |
1907 | /* They only differ if `name' is a fb or dollar local |
1908 | label name. */ | |
1909 | if (name2 != name && ! S_IS_DEFINED (symp)) | |
0e389e77 | 1910 | as_bad (_("local label `%s' is not defined"), name2); |
252b5132 RH |
1911 | } |
1912 | ||
1913 | /* Do it again, because adjust_reloc_syms might introduce | |
1914 | more symbols. They'll probably only be section symbols, | |
1915 | but they'll still need to have the values computed. */ | |
6386f3a7 | 1916 | resolve_symbol_value (symp); |
252b5132 RH |
1917 | |
1918 | /* Skip symbols which were equated to undefined or common | |
1919 | symbols. */ | |
e0890092 | 1920 | if (symbol_equated_reloc_p (symp)) |
252b5132 RH |
1921 | { |
1922 | symbol_remove (symp, &symbol_rootP, &symbol_lastP); | |
1923 | continue; | |
1924 | } | |
1925 | ||
1926 | /* So far, common symbols have been treated like undefined symbols. | |
1927 | Put them in the common section now. */ | |
1928 | if (S_IS_DEFINED (symp) == 0 | |
1929 | && S_GET_VALUE (symp) != 0) | |
1930 | S_SET_SEGMENT (symp, bfd_com_section_ptr); | |
1931 | #if 0 | |
1932 | printf ("symbol `%s'\n\t@%x: value=%d flags=%x seg=%s\n", | |
1933 | S_GET_NAME (symp), symp, | |
1934 | S_GET_VALUE (symp), | |
49309057 ILT |
1935 | symbol_get_bfdsym (symp)->flags, |
1936 | segment_name (S_GET_SEGMENT (symp))); | |
252b5132 RH |
1937 | #endif |
1938 | ||
1939 | #ifdef obj_frob_symbol | |
1940 | obj_frob_symbol (symp, punt); | |
1941 | #endif | |
1942 | #ifdef tc_frob_symbol | |
49309057 | 1943 | if (! punt || symbol_used_in_reloc_p (symp)) |
252b5132 RH |
1944 | tc_frob_symbol (symp, punt); |
1945 | #endif | |
1946 | ||
1947 | /* If we don't want to keep this symbol, splice it out of | |
1948 | the chain now. If EMIT_SECTION_SYMBOLS is 0, we never | |
1949 | want section symbols. Otherwise, we skip local symbols | |
1950 | and symbols that the frob_symbol macros told us to punt, | |
1951 | but we keep such symbols if they are used in relocs. */ | |
a161fe53 AM |
1952 | if (symp == abs_section_sym |
1953 | || (! EMIT_SECTION_SYMBOLS | |
1954 | && symbol_section_p (symp)) | |
252b5132 RH |
1955 | /* Note that S_IS_EXTERN and S_IS_LOCAL are not always |
1956 | opposites. Sometimes the former checks flags and the | |
1957 | latter examines the name... */ | |
1958 | || (!S_IS_EXTERN (symp) | |
a161fe53 | 1959 | && (punt || S_IS_LOCAL (symp)) |
49309057 | 1960 | && ! symbol_used_in_reloc_p (symp))) |
252b5132 RH |
1961 | { |
1962 | symbol_remove (symp, &symbol_rootP, &symbol_lastP); | |
efaf0ba4 | 1963 | |
252b5132 RH |
1964 | /* After symbol_remove, symbol_next(symp) still returns |
1965 | the one that came after it in the chain. So we don't | |
1966 | need to do any extra cleanup work here. */ | |
252b5132 RH |
1967 | continue; |
1968 | } | |
1969 | ||
1970 | /* Make sure we really got a value for the symbol. */ | |
49309057 | 1971 | if (! symbol_resolved_p (symp)) |
252b5132 | 1972 | { |
0e389e77 | 1973 | as_bad (_("can't resolve value for symbol `%s'"), |
252b5132 | 1974 | S_GET_NAME (symp)); |
49309057 | 1975 | symbol_mark_resolved (symp); |
252b5132 RH |
1976 | } |
1977 | ||
1978 | /* Set the value into the BFD symbol. Up til now the value | |
1979 | has only been kept in the gas symbolS struct. */ | |
49309057 | 1980 | symbol_get_bfdsym (symp)->value = S_GET_VALUE (symp); |
252b5132 RH |
1981 | } |
1982 | } | |
1983 | ||
1984 | PROGRESS (1); | |
1985 | ||
1986 | /* Now do any format-specific adjustments to the symbol table, such | |
1987 | as adding file symbols. */ | |
1988 | #ifdef tc_adjust_symtab | |
1989 | tc_adjust_symtab (); | |
1990 | #endif | |
1991 | #ifdef obj_adjust_symtab | |
1992 | obj_adjust_symtab (); | |
1993 | #endif | |
1994 | ||
1995 | /* Now that all the sizes are known, and contents correct, we can | |
1996 | start writing to the file. */ | |
1997 | set_symtab (); | |
1998 | ||
1999 | /* If *_frob_file changes the symbol value at this point, it is | |
2000 | responsible for moving the changed value into symp->bsym->value | |
2001 | as well. Hopefully all symbol value changing can be done in | |
2002 | *_frob_symbol. */ | |
2003 | #ifdef tc_frob_file | |
2004 | tc_frob_file (); | |
2005 | #endif | |
2006 | #ifdef obj_frob_file | |
2007 | obj_frob_file (); | |
2008 | #endif | |
2009 | ||
2010 | bfd_map_over_sections (stdoutput, write_relocs, (char *) 0); | |
2011 | ||
2012 | #ifdef tc_frob_file_after_relocs | |
2013 | tc_frob_file_after_relocs (); | |
2014 | #endif | |
2015 | #ifdef obj_frob_file_after_relocs | |
2016 | obj_frob_file_after_relocs (); | |
2017 | #endif | |
2018 | ||
2019 | bfd_map_over_sections (stdoutput, write_contents, (char *) 0); | |
efaf0ba4 | 2020 | #endif /* BFD_ASSEMBLER */ |
252b5132 | 2021 | } |
efaf0ba4 | 2022 | #endif /* ! BFD */ |
252b5132 RH |
2023 | |
2024 | #ifdef TC_GENERIC_RELAX_TABLE | |
2025 | ||
252b5132 RH |
2026 | /* Relax a fragment by scanning TC_GENERIC_RELAX_TABLE. */ |
2027 | ||
2028 | long | |
d7342424 | 2029 | relax_frag (segT segment, fragS *fragP, long stretch) |
252b5132 RH |
2030 | { |
2031 | const relax_typeS *this_type; | |
2032 | const relax_typeS *start_type; | |
2033 | relax_substateT next_state; | |
2034 | relax_substateT this_state; | |
685736be | 2035 | offsetT growth; |
38686296 AM |
2036 | offsetT aim; |
2037 | addressT target; | |
2038 | addressT address; | |
2039 | symbolS *symbolP; | |
2040 | const relax_typeS *table; | |
2041 | ||
2042 | target = fragP->fr_offset; | |
2043 | address = fragP->fr_address; | |
2044 | table = TC_GENERIC_RELAX_TABLE; | |
252b5132 RH |
2045 | this_state = fragP->fr_subtype; |
2046 | start_type = this_type = table + this_state; | |
38686296 | 2047 | symbolP = fragP->fr_symbol; |
252b5132 RH |
2048 | |
2049 | if (symbolP) | |
2050 | { | |
c842b53a ILT |
2051 | fragS *sym_frag; |
2052 | ||
2053 | sym_frag = symbol_get_frag (symbolP); | |
2054 | ||
252b5132 RH |
2055 | #ifndef DIFF_EXPR_OK |
2056 | #if !defined (MANY_SEGMENTS) && !defined (BFD_ASSEMBLER) | |
2057 | know ((S_GET_SEGMENT (symbolP) == SEG_ABSOLUTE) | |
2058 | || (S_GET_SEGMENT (symbolP) == SEG_DATA) | |
2059 | || (S_GET_SEGMENT (symbolP) == SEG_BSS) | |
2060 | || (S_GET_SEGMENT (symbolP) == SEG_TEXT)); | |
2061 | #endif | |
c842b53a | 2062 | know (sym_frag != NULL); |
252b5132 | 2063 | #endif |
a161fe53 | 2064 | know (S_GET_SEGMENT (symbolP) != absolute_section |
c842b53a | 2065 | || sym_frag == &zero_address_frag); |
ac62c346 | 2066 | target += S_GET_VALUE (symbolP); |
252b5132 RH |
2067 | |
2068 | /* If frag has yet to be reached on this pass, | |
2069 | assume it will move by STRETCH just as we did. | |
2070 | If this is not so, it will be because some frag | |
38686296 | 2071 | between grows, and that will force another pass. */ |
252b5132 | 2072 | |
c842b53a | 2073 | if (stretch != 0 |
38686296 AM |
2074 | && sym_frag->relax_marker != fragP->relax_marker |
2075 | && S_GET_SEGMENT (symbolP) == segment) | |
252b5132 RH |
2076 | { |
2077 | target += stretch; | |
2078 | } | |
2079 | } | |
2080 | ||
2081 | aim = target - address - fragP->fr_fix; | |
2082 | #ifdef TC_PCREL_ADJUST | |
efaf0ba4 NC |
2083 | /* Currently only the ns32k family needs this. */ |
2084 | aim += TC_PCREL_ADJUST (fragP); | |
2085 | /* #else */ | |
252b5132 RH |
2086 | /* This machine doesn't want to use pcrel_adjust. |
2087 | In that case, pcrel_adjust should be zero. */ | |
efaf0ba4 NC |
2088 | #if 0 |
2089 | assert (fragP->fr_targ.ns32k.pcrel_adjust == 0); | |
252b5132 | 2090 | #endif |
efaf0ba4 NC |
2091 | #endif |
2092 | #ifdef md_prepare_relax_scan /* formerly called M68K_AIM_KLUDGE */ | |
252b5132 RH |
2093 | md_prepare_relax_scan (fragP, address, aim, this_state, this_type); |
2094 | #endif | |
2095 | ||
2096 | if (aim < 0) | |
2097 | { | |
efaf0ba4 | 2098 | /* Look backwards. */ |
252b5132 RH |
2099 | for (next_state = this_type->rlx_more; next_state;) |
2100 | if (aim >= this_type->rlx_backward) | |
2101 | next_state = 0; | |
2102 | else | |
2103 | { | |
efaf0ba4 | 2104 | /* Grow to next state. */ |
252b5132 RH |
2105 | this_state = next_state; |
2106 | this_type = table + this_state; | |
2107 | next_state = this_type->rlx_more; | |
2108 | } | |
2109 | } | |
2110 | else | |
2111 | { | |
efaf0ba4 | 2112 | /* Look forwards. */ |
252b5132 RH |
2113 | for (next_state = this_type->rlx_more; next_state;) |
2114 | if (aim <= this_type->rlx_forward) | |
2115 | next_state = 0; | |
2116 | else | |
2117 | { | |
efaf0ba4 | 2118 | /* Grow to next state. */ |
252b5132 RH |
2119 | this_state = next_state; |
2120 | this_type = table + this_state; | |
2121 | next_state = this_type->rlx_more; | |
2122 | } | |
2123 | } | |
2124 | ||
2125 | growth = this_type->rlx_length - start_type->rlx_length; | |
2126 | if (growth != 0) | |
2127 | fragP->fr_subtype = this_state; | |
2128 | return growth; | |
2129 | } | |
2130 | ||
efaf0ba4 | 2131 | #endif /* defined (TC_GENERIC_RELAX_TABLE) */ |
252b5132 RH |
2132 | |
2133 | /* Relax_align. Advance location counter to next address that has 'alignment' | |
2134 | lowest order bits all 0s, return size of adjustment made. */ | |
2135 | static relax_addressT | |
d7342424 KH |
2136 | relax_align (register relax_addressT address, /* Address now. */ |
2137 | register int alignment /* Alignment (binary). */) | |
252b5132 RH |
2138 | { |
2139 | relax_addressT mask; | |
2140 | relax_addressT new_address; | |
2141 | ||
2142 | mask = ~((~0) << alignment); | |
2143 | new_address = (address + mask) & (~mask); | |
2144 | #ifdef LINKER_RELAXING_SHRINKS_ONLY | |
2145 | if (linkrelax) | |
2146 | /* We must provide lots of padding, so the linker can discard it | |
2147 | when needed. The linker will not add extra space, ever. */ | |
2148 | new_address += (1 << alignment); | |
2149 | #endif | |
2150 | return (new_address - address); | |
2151 | } | |
2152 | ||
efaf0ba4 NC |
2153 | /* Now we have a segment, not a crowd of sub-segments, we can make |
2154 | fr_address values. | |
58a77e41 | 2155 | |
efaf0ba4 | 2156 | Relax the frags. |
58a77e41 | 2157 | |
efaf0ba4 NC |
2158 | After this, all frags in this segment have addresses that are correct |
2159 | within the segment. Since segments live in different file addresses, | |
2160 | these frag addresses may not be the same as final object-file | |
2161 | addresses. */ | |
2162 | ||
e46d99eb | 2163 | int |
d7342424 | 2164 | relax_segment (struct frag *segment_frag_root, segT segment) |
252b5132 RH |
2165 | { |
2166 | register struct frag *fragP; | |
2167 | register relax_addressT address; | |
e46d99eb AM |
2168 | int ret; |
2169 | ||
252b5132 RH |
2170 | #if !defined (MANY_SEGMENTS) && !defined (BFD_ASSEMBLER) |
2171 | know (segment == SEG_DATA || segment == SEG_TEXT || segment == SEG_BSS); | |
2172 | #endif | |
efaf0ba4 | 2173 | /* In case md_estimate_size_before_relax() wants to make fixSs. */ |
252b5132 RH |
2174 | subseg_change (segment, 0); |
2175 | ||
2176 | /* For each frag in segment: count and store (a 1st guess of) | |
2177 | fr_address. */ | |
2178 | address = 0; | |
2179 | for (fragP = segment_frag_root; fragP; fragP = fragP->fr_next) | |
2180 | { | |
38686296 | 2181 | fragP->relax_marker = 0; |
252b5132 RH |
2182 | fragP->fr_address = address; |
2183 | address += fragP->fr_fix; | |
2184 | ||
2185 | switch (fragP->fr_type) | |
2186 | { | |
2187 | case rs_fill: | |
2188 | address += fragP->fr_offset * fragP->fr_var; | |
2189 | break; | |
2190 | ||
2191 | case rs_align: | |
2192 | case rs_align_code: | |
0a9ef439 | 2193 | case rs_align_test: |
252b5132 RH |
2194 | { |
2195 | addressT offset = relax_align (address, (int) fragP->fr_offset); | |
2196 | ||
2197 | if (fragP->fr_subtype != 0 && offset > fragP->fr_subtype) | |
2198 | offset = 0; | |
2199 | ||
2200 | if (offset % fragP->fr_var != 0) | |
2201 | { | |
54d3cad9 AM |
2202 | as_bad_where (fragP->fr_file, fragP->fr_line, |
2203 | _("alignment padding (%lu bytes) not a multiple of %ld"), | |
2204 | (unsigned long) offset, (long) fragP->fr_var); | |
252b5132 RH |
2205 | offset -= (offset % fragP->fr_var); |
2206 | } | |
2207 | ||
2208 | address += offset; | |
2209 | } | |
2210 | break; | |
2211 | ||
2212 | case rs_org: | |
2213 | case rs_space: | |
2214 | /* Assume .org is nugatory. It will grow with 1st relax. */ | |
2215 | break; | |
2216 | ||
2217 | case rs_machine_dependent: | |
e0890092 AM |
2218 | /* If fr_symbol is an expression, this call to |
2219 | resolve_symbol_value sets up the correct segment, which will | |
2220 | likely be needed in md_estimate_size_before_relax. */ | |
2221 | if (fragP->fr_symbol) | |
2222 | resolve_symbol_value (fragP->fr_symbol); | |
2223 | ||
252b5132 RH |
2224 | address += md_estimate_size_before_relax (fragP, segment); |
2225 | break; | |
2226 | ||
2227 | #ifndef WORKING_DOT_WORD | |
efaf0ba4 | 2228 | /* Broken words don't concern us yet. */ |
252b5132 RH |
2229 | case rs_broken_word: |
2230 | break; | |
2231 | #endif | |
2232 | ||
2233 | case rs_leb128: | |
efaf0ba4 | 2234 | /* Initial guess is always 1; doing otherwise can result in |
252b5132 RH |
2235 | stable solutions that are larger than the minimum. */ |
2236 | address += fragP->fr_offset = 1; | |
2237 | break; | |
2238 | ||
2239 | case rs_cfa: | |
2240 | address += eh_frame_estimate_size_before_relax (fragP); | |
2241 | break; | |
2242 | ||
220e750f RH |
2243 | case rs_dwarf2dbg: |
2244 | address += dwarf2dbg_estimate_size_before_relax (fragP); | |
2245 | break; | |
2246 | ||
252b5132 RH |
2247 | default: |
2248 | BAD_CASE (fragP->fr_type); | |
2249 | break; | |
efaf0ba4 NC |
2250 | } |
2251 | } | |
252b5132 RH |
2252 | |
2253 | /* Do relax(). */ | |
2254 | { | |
685736be | 2255 | offsetT stretch; /* May be any size, 0 or negative. */ |
efaf0ba4 NC |
2256 | /* Cumulative number of addresses we have relaxed this pass. |
2257 | We may have relaxed more than one address. */ | |
e46d99eb | 2258 | int stretched; /* Have we stretched on this pass? */ |
252b5132 RH |
2259 | /* This is 'cuz stretch may be zero, when, in fact some piece of code |
2260 | grew, and another shrank. If a branch instruction doesn't fit anymore, | |
2261 | we could be scrod. */ | |
2262 | ||
2263 | do | |
2264 | { | |
e46d99eb AM |
2265 | stretch = 0; |
2266 | stretched = 0; | |
58a77e41 | 2267 | |
252b5132 RH |
2268 | for (fragP = segment_frag_root; fragP; fragP = fragP->fr_next) |
2269 | { | |
685736be | 2270 | offsetT growth = 0; |
252b5132 RH |
2271 | addressT was_address; |
2272 | offsetT offset; | |
2273 | symbolS *symbolP; | |
2274 | ||
38686296 | 2275 | fragP->relax_marker ^= 1; |
252b5132 RH |
2276 | was_address = fragP->fr_address; |
2277 | address = fragP->fr_address += stretch; | |
2278 | symbolP = fragP->fr_symbol; | |
2279 | offset = fragP->fr_offset; | |
2280 | ||
2281 | switch (fragP->fr_type) | |
2282 | { | |
efaf0ba4 | 2283 | case rs_fill: /* .fill never relaxes. */ |
252b5132 RH |
2284 | growth = 0; |
2285 | break; | |
2286 | ||
2287 | #ifndef WORKING_DOT_WORD | |
2288 | /* JF: This is RMS's idea. I do *NOT* want to be blamed | |
2289 | for it I do not want to write it. I do not want to have | |
2290 | anything to do with it. This is not the proper way to | |
2291 | implement this misfeature. */ | |
2292 | case rs_broken_word: | |
2293 | { | |
2294 | struct broken_word *lie; | |
2295 | struct broken_word *untruth; | |
2296 | ||
2297 | /* Yes this is ugly (storing the broken_word pointer | |
2298 | in the symbol slot). Still, this whole chunk of | |
2299 | code is ugly, and I don't feel like doing anything | |
2300 | about it. Think of it as stubbornness in action. */ | |
2301 | growth = 0; | |
2302 | for (lie = (struct broken_word *) (fragP->fr_symbol); | |
2303 | lie && lie->dispfrag == fragP; | |
2304 | lie = lie->next_broken_word) | |
2305 | { | |
2306 | ||
2307 | if (lie->added) | |
2308 | continue; | |
2309 | ||
ac62c346 | 2310 | offset = (S_GET_VALUE (lie->add) |
252b5132 | 2311 | + lie->addnum |
ac62c346 | 2312 | - S_GET_VALUE (lie->sub)); |
252b5132 RH |
2313 | if (offset <= -32768 || offset >= 32767) |
2314 | { | |
2315 | if (flag_warn_displacement) | |
2316 | { | |
2317 | char buf[50]; | |
2318 | sprint_value (buf, (addressT) lie->addnum); | |
54d3cad9 AM |
2319 | as_warn_where (fragP->fr_file, fragP->fr_line, |
2320 | _(".word %s-%s+%s didn't fit"), | |
2321 | S_GET_NAME (lie->add), | |
2322 | S_GET_NAME (lie->sub), | |
2323 | buf); | |
252b5132 RH |
2324 | } |
2325 | lie->added = 1; | |
2326 | if (fragP->fr_subtype == 0) | |
2327 | { | |
2328 | fragP->fr_subtype++; | |
2329 | growth += md_short_jump_size; | |
2330 | } | |
2331 | for (untruth = lie->next_broken_word; | |
2332 | untruth && untruth->dispfrag == lie->dispfrag; | |
2333 | untruth = untruth->next_broken_word) | |
49309057 ILT |
2334 | if ((symbol_get_frag (untruth->add) |
2335 | == symbol_get_frag (lie->add)) | |
2336 | && (S_GET_VALUE (untruth->add) | |
2337 | == S_GET_VALUE (lie->add))) | |
252b5132 RH |
2338 | { |
2339 | untruth->added = 2; | |
2340 | untruth->use_jump = lie; | |
2341 | } | |
2342 | growth += md_long_jump_size; | |
2343 | } | |
2344 | } | |
2345 | ||
2346 | break; | |
efaf0ba4 | 2347 | } /* case rs_broken_word */ |
252b5132 RH |
2348 | #endif |
2349 | case rs_align: | |
2350 | case rs_align_code: | |
0a9ef439 | 2351 | case rs_align_test: |
252b5132 RH |
2352 | { |
2353 | addressT oldoff, newoff; | |
2354 | ||
2355 | oldoff = relax_align (was_address + fragP->fr_fix, | |
2356 | (int) offset); | |
2357 | newoff = relax_align (address + fragP->fr_fix, | |
2358 | (int) offset); | |
2359 | ||
2360 | if (fragP->fr_subtype != 0) | |
2361 | { | |
2362 | if (oldoff > fragP->fr_subtype) | |
2363 | oldoff = 0; | |
2364 | if (newoff > fragP->fr_subtype) | |
2365 | newoff = 0; | |
2366 | } | |
2367 | ||
2368 | growth = newoff - oldoff; | |
2369 | } | |
2370 | break; | |
2371 | ||
2372 | case rs_org: | |
2373 | { | |
e46d99eb AM |
2374 | addressT target = offset; |
2375 | addressT after; | |
252b5132 RH |
2376 | |
2377 | if (symbolP) | |
2378 | { | |
2379 | #if !defined (MANY_SEGMENTS) && !defined (BFD_ASSEMBLER) | |
2380 | know ((S_GET_SEGMENT (symbolP) == SEG_ABSOLUTE) | |
2381 | || (S_GET_SEGMENT (symbolP) == SEG_DATA) | |
2382 | || (S_GET_SEGMENT (symbolP) == SEG_TEXT) | |
2383 | || S_GET_SEGMENT (symbolP) == SEG_BSS); | |
2384 | know (symbolP->sy_frag); | |
2385 | know (!(S_GET_SEGMENT (symbolP) == SEG_ABSOLUTE) | |
2386 | || (symbolP->sy_frag == &zero_address_frag)); | |
2387 | #endif | |
6e917903 TW |
2388 | /* Convert from an actual address to an octet offset |
2389 | into the section. Here it is assumed that the | |
2390 | section's VMA is zero, and can omit subtracting it | |
2391 | from the symbol's value to get the address offset. */ | |
2392 | know (S_GET_SECTION (symbolP)->vma == 0); | |
2393 | target += S_GET_VALUE (symbolP) * OCTETS_PER_BYTE; | |
ac62c346 | 2394 | } |
252b5132 RH |
2395 | |
2396 | know (fragP->fr_next); | |
2397 | after = fragP->fr_next->fr_address; | |
2398 | growth = target - after; | |
2399 | if (growth < 0) | |
2400 | { | |
2401 | /* Growth may be negative, but variable part of frag | |
2402 | cannot have fewer than 0 chars. That is, we can't | |
efaf0ba4 | 2403 | .org backwards. */ |
14ad458a | 2404 | as_bad_where (fragP->fr_file, fragP->fr_line, |
685736be | 2405 | _("attempt to move .org backwards")); |
14ad458a ILT |
2406 | |
2407 | /* We've issued an error message. Change the | |
2408 | frag to avoid cascading errors. */ | |
2409 | fragP->fr_type = rs_align; | |
2410 | fragP->fr_subtype = 0; | |
2411 | fragP->fr_offset = 0; | |
2412 | fragP->fr_fix = after - address; | |
2413 | growth = stretch; | |
252b5132 RH |
2414 | } |
2415 | ||
efaf0ba4 NC |
2416 | /* This is an absolute growth factor */ |
2417 | growth -= stretch; | |
252b5132 RH |
2418 | break; |
2419 | } | |
2420 | ||
2421 | case rs_space: | |
54d3cad9 | 2422 | growth = 0; |
252b5132 RH |
2423 | if (symbolP) |
2424 | { | |
766c03c9 AM |
2425 | offsetT amount; |
2426 | ||
2427 | amount = S_GET_VALUE (symbolP); | |
9e40345d | 2428 | if (S_GET_SEGMENT (symbolP) != absolute_section |
252b5132 RH |
2429 | || S_IS_COMMON (symbolP) |
2430 | || ! S_IS_DEFINED (symbolP)) | |
252b5132 | 2431 | { |
54d3cad9 AM |
2432 | as_bad_where (fragP->fr_file, fragP->fr_line, |
2433 | _(".space specifies non-absolute value")); | |
2434 | /* Prevent repeat of this error message. */ | |
2435 | fragP->fr_symbol = 0; | |
2436 | } | |
2437 | else if (amount < 0) | |
2438 | { | |
2439 | as_warn_where (fragP->fr_file, fragP->fr_line, | |
2440 | _(".space or .fill with negative value, ignored")); | |
766c03c9 | 2441 | fragP->fr_symbol = 0; |
252b5132 | 2442 | } |
54d3cad9 | 2443 | else |
050be34e | 2444 | growth = (was_address + fragP->fr_fix + amount |
54d3cad9 | 2445 | - fragP->fr_next->fr_address); |
252b5132 | 2446 | } |
252b5132 RH |
2447 | break; |
2448 | ||
2449 | case rs_machine_dependent: | |
2450 | #ifdef md_relax_frag | |
c842b53a | 2451 | growth = md_relax_frag (segment, fragP, stretch); |
252b5132 RH |
2452 | #else |
2453 | #ifdef TC_GENERIC_RELAX_TABLE | |
2454 | /* The default way to relax a frag is to look through | |
2455 | TC_GENERIC_RELAX_TABLE. */ | |
c842b53a | 2456 | growth = relax_frag (segment, fragP, stretch); |
efaf0ba4 | 2457 | #endif /* TC_GENERIC_RELAX_TABLE */ |
252b5132 RH |
2458 | #endif |
2459 | break; | |
2460 | ||
2461 | case rs_leb128: | |
2462 | { | |
2463 | valueT value; | |
685736be | 2464 | offsetT size; |
252b5132 | 2465 | |
6386f3a7 | 2466 | value = resolve_symbol_value (fragP->fr_symbol); |
252b5132 RH |
2467 | size = sizeof_leb128 (value, fragP->fr_subtype); |
2468 | growth = size - fragP->fr_offset; | |
2469 | fragP->fr_offset = size; | |
2470 | } | |
2471 | break; | |
2472 | ||
2473 | case rs_cfa: | |
2474 | growth = eh_frame_relax_frag (fragP); | |
2475 | break; | |
2476 | ||
220e750f RH |
2477 | case rs_dwarf2dbg: |
2478 | growth = dwarf2dbg_relax_frag (fragP); | |
2479 | break; | |
2480 | ||
252b5132 RH |
2481 | default: |
2482 | BAD_CASE (fragP->fr_type); | |
2483 | break; | |
2484 | } | |
2485 | if (growth) | |
2486 | { | |
2487 | stretch += growth; | |
e46d99eb | 2488 | stretched = 1; |
252b5132 | 2489 | } |
efaf0ba4 | 2490 | } /* For each frag in the segment. */ |
252b5132 | 2491 | } |
efaf0ba4 NC |
2492 | while (stretched); /* Until nothing further to relax. */ |
2493 | } /* do_relax */ | |
252b5132 | 2494 | |
e46d99eb AM |
2495 | ret = 0; |
2496 | for (fragP = segment_frag_root; fragP; fragP = fragP->fr_next) | |
2497 | if (fragP->last_fr_address != fragP->fr_address) | |
2498 | { | |
2499 | fragP->last_fr_address = fragP->fr_address; | |
2500 | ret = 1; | |
2501 | } | |
2502 | return ret; | |
efaf0ba4 | 2503 | } |
252b5132 RH |
2504 | |
2505 | #if defined (BFD_ASSEMBLER) || (!defined (BFD) && !defined (OBJ_VMS)) | |
2506 | ||
252b5132 RH |
2507 | /* fixup_segment() |
2508 | ||
2509 | Go through all the fixS's in a segment and see which ones can be | |
2510 | handled now. (These consist of fixS where we have since discovered | |
2511 | the value of a symbol, or the address of the frag involved.) | |
94f592af | 2512 | For each one, call md_apply_fix3 to put the fix into the frag data. |
252b5132 RH |
2513 | |
2514 | Result is a count of how many relocation structs will be needed to | |
2515 | handle the remaining fixS's that we couldn't completely handle here. | |
2516 | These will be output later by emit_relocations(). */ | |
2517 | ||
2518 | static long | |
d7342424 | 2519 | fixup_segment (fixS *fixP, segT this_segment) |
252b5132 RH |
2520 | { |
2521 | long seg_reloc_count = 0; | |
252b5132 | 2522 | valueT add_number; |
252b5132 RH |
2523 | fragS *fragP; |
2524 | segT add_symbol_segment = absolute_section; | |
2525 | ||
a161fe53 AM |
2526 | if (fixP != NULL && abs_section_sym == NULL) |
2527 | { | |
2528 | #ifndef BFD_ASSEMBLER | |
2529 | abs_section_sym = &abs_symbol; | |
2530 | #else | |
2531 | abs_section_sym = section_symbol (absolute_section); | |
2532 | #endif | |
2533 | } | |
2534 | ||
252b5132 RH |
2535 | /* If the linker is doing the relaxing, we must not do any fixups. |
2536 | ||
df44284e AM |
2537 | Well, strictly speaking that's not true -- we could do any that |
2538 | are PC-relative and don't cross regions that could change size. | |
2539 | And for the i960 we might be able to turn callx/callj into bal | |
2540 | anyways in cases where we know the maximum displacement. */ | |
2541 | if (linkrelax && TC_LINKRELAX_FIXUP (this_segment)) | |
252b5132 RH |
2542 | { |
2543 | for (; fixP; fixP = fixP->fx_next) | |
a161fe53 AM |
2544 | if (!fixP->fx_done) |
2545 | { | |
2546 | if (fixP->fx_addsy == NULL) | |
2547 | { | |
2548 | /* There was no symbol required by this relocation. | |
2549 | However, BFD doesn't really handle relocations | |
2550 | without symbols well. So fake up a local symbol in | |
2551 | the absolute section. */ | |
2552 | fixP->fx_addsy = abs_section_sym; | |
2553 | } | |
2554 | symbol_mark_used_in_reloc (fixP->fx_addsy); | |
2555 | if (fixP->fx_subsy != NULL) | |
2556 | symbol_mark_used_in_reloc (fixP->fx_subsy); | |
2557 | seg_reloc_count++; | |
2558 | } | |
252b5132 RH |
2559 | TC_ADJUST_RELOC_COUNT (fixP, seg_reloc_count); |
2560 | return seg_reloc_count; | |
2561 | } | |
2562 | ||
2563 | for (; fixP; fixP = fixP->fx_next) | |
2564 | { | |
252b5132 RH |
2565 | #ifdef DEBUG5 |
2566 | fprintf (stderr, "\nprocessing fixup:\n"); | |
2567 | print_fixup (fixP); | |
2568 | #endif | |
2569 | ||
252b5132 RH |
2570 | fragP = fixP->fx_frag; |
2571 | know (fragP); | |
252b5132 | 2572 | #ifdef TC_VALIDATE_FIX |
df44284e | 2573 | TC_VALIDATE_FIX (fixP, this_segment, skip); |
252b5132 | 2574 | #endif |
252b5132 | 2575 | add_number = fixP->fx_offset; |
252b5132 | 2576 | |
a161fe53 AM |
2577 | if (fixP->fx_addsy != NULL |
2578 | && symbol_mri_common_p (fixP->fx_addsy)) | |
252b5132 | 2579 | { |
a161fe53 AM |
2580 | know (fixP->fx_addsy->sy_value.X_op == O_symbol); |
2581 | add_number += S_GET_VALUE (fixP->fx_addsy); | |
252b5132 | 2582 | fixP->fx_offset = add_number; |
a161fe53 AM |
2583 | fixP->fx_addsy |
2584 | = symbol_get_value_expression (fixP->fx_addsy)->X_add_symbol; | |
252b5132 RH |
2585 | } |
2586 | ||
a161fe53 AM |
2587 | if (fixP->fx_addsy != NULL) |
2588 | add_symbol_segment = S_GET_SEGMENT (fixP->fx_addsy); | |
252b5132 | 2589 | |
a161fe53 | 2590 | if (fixP->fx_subsy != NULL) |
252b5132 | 2591 | { |
a161fe53 AM |
2592 | segT sub_symbol_segment; |
2593 | resolve_symbol_value (fixP->fx_subsy); | |
2594 | sub_symbol_segment = S_GET_SEGMENT (fixP->fx_subsy); | |
2595 | if (fixP->fx_addsy != NULL | |
2596 | && sub_symbol_segment == add_symbol_segment | |
2597 | && !TC_FORCE_RELOCATION_SUB_SAME (fixP, add_symbol_segment)) | |
252b5132 | 2598 | { |
a161fe53 AM |
2599 | add_number += S_GET_VALUE (fixP->fx_addsy); |
2600 | add_number -= S_GET_VALUE (fixP->fx_subsy); | |
2601 | fixP->fx_offset = add_number; | |
a161fe53 AM |
2602 | fixP->fx_addsy = NULL; |
2603 | fixP->fx_subsy = NULL; | |
1a317472 AM |
2604 | #ifdef TC_M68K |
2605 | /* See the comment below about 68k weirdness. */ | |
a161fe53 | 2606 | fixP->fx_pcrel = 0; |
1a317472 | 2607 | #endif |
252b5132 | 2608 | } |
a161fe53 AM |
2609 | else if (sub_symbol_segment == absolute_section |
2610 | && !TC_FORCE_RELOCATION_SUB_ABS (fixP)) | |
252b5132 | 2611 | { |
a161fe53 AM |
2612 | add_number -= S_GET_VALUE (fixP->fx_subsy); |
2613 | fixP->fx_offset = add_number; | |
2614 | fixP->fx_subsy = NULL; | |
2615 | } | |
2616 | else if (sub_symbol_segment == this_segment | |
2617 | && !TC_FORCE_RELOCATION_SUB_LOCAL (fixP)) | |
2618 | { | |
2619 | add_number -= S_GET_VALUE (fixP->fx_subsy); | |
26346241 AM |
2620 | fixP->fx_offset = (add_number + fixP->fx_dot_value |
2621 | + fixP->fx_frag->fr_address); | |
252b5132 | 2622 | |
a161fe53 AM |
2623 | /* Make it pc-relative. If the back-end code has not |
2624 | selected a pc-relative reloc, cancel the adjustment | |
2625 | we do later on all pc-relative relocs. */ | |
2626 | if (0 | |
1a16aca4 | 2627 | #ifdef TC_M68K |
a161fe53 AM |
2628 | /* Do this for m68k even if it's already described |
2629 | as pc-relative. On the m68k, an operand of | |
2630 | "pc@(foo-.-2)" should address "foo" in a | |
2631 | pc-relative mode. */ | |
2632 | || 1 | |
2633 | #endif | |
2634 | || !fixP->fx_pcrel) | |
2635 | add_number += MD_PCREL_FROM_SECTION (fixP, this_segment); | |
2636 | fixP->fx_subsy = NULL; | |
2637 | fixP->fx_pcrel = 1; | |
2638 | } | |
2639 | else if (!TC_VALIDATE_FIX_SUB (fixP)) | |
2640 | { | |
2641 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
2642 | _("can't resolve `%s' {%s section} - `%s' {%s section}"), | |
2643 | fixP->fx_addsy ? S_GET_NAME (fixP->fx_addsy) : "0", | |
2644 | segment_name (add_symbol_segment), | |
2645 | S_GET_NAME (fixP->fx_subsy), | |
2646 | segment_name (sub_symbol_segment)); | |
252b5132 RH |
2647 | } |
2648 | } | |
2649 | ||
a161fe53 | 2650 | if (fixP->fx_addsy) |
252b5132 | 2651 | { |
a161fe53 AM |
2652 | if (add_symbol_segment == this_segment |
2653 | && !TC_FORCE_RELOCATION_LOCAL (fixP)) | |
252b5132 | 2654 | { |
efaf0ba4 NC |
2655 | /* This fixup was made when the symbol's segment was |
2656 | SEG_UNKNOWN, but it is now in the local segment. | |
2657 | So we know how to do the address without relocation. */ | |
a161fe53 AM |
2658 | add_number += S_GET_VALUE (fixP->fx_addsy); |
2659 | fixP->fx_offset = add_number; | |
2660 | if (fixP->fx_pcrel) | |
2661 | add_number -= MD_PCREL_FROM_SECTION (fixP, this_segment); | |
2662 | fixP->fx_addsy = NULL; | |
2663 | fixP->fx_pcrel = 0; | |
252b5132 | 2664 | } |
a161fe53 AM |
2665 | else if (add_symbol_segment == absolute_section |
2666 | && !TC_FORCE_RELOCATION_ABS (fixP)) | |
252b5132 | 2667 | { |
a161fe53 AM |
2668 | add_number += S_GET_VALUE (fixP->fx_addsy); |
2669 | fixP->fx_offset = add_number; | |
2670 | fixP->fx_addsy = NULL; | |
2671 | } | |
2672 | else if (add_symbol_segment != undefined_section | |
252b5132 | 2673 | #ifdef BFD_ASSEMBLER |
a161fe53 | 2674 | && ! bfd_is_com_section (add_symbol_segment) |
252b5132 | 2675 | #endif |
a161fe53 AM |
2676 | && MD_APPLY_SYM_VALUE (fixP)) |
2677 | add_number += S_GET_VALUE (fixP->fx_addsy); | |
252b5132 RH |
2678 | } |
2679 | ||
a161fe53 | 2680 | if (fixP->fx_pcrel) |
252b5132 | 2681 | { |
df44284e | 2682 | add_number -= MD_PCREL_FROM_SECTION (fixP, this_segment); |
a161fe53 | 2683 | if (!fixP->fx_done && fixP->fx_addsy == NULL) |
252b5132 | 2684 | { |
a161fe53 AM |
2685 | /* There was no symbol required by this relocation. |
2686 | However, BFD doesn't really handle relocations | |
2687 | without symbols well. So fake up a local symbol in | |
2688 | the absolute section. */ | |
2689 | fixP->fx_addsy = abs_section_sym; | |
252b5132 RH |
2690 | } |
2691 | } | |
2692 | ||
6d4d30bb | 2693 | if (!fixP->fx_done) |
df44284e | 2694 | md_apply_fix3 (fixP, &add_number, this_segment); |
6d4d30bb | 2695 | |
a161fe53 AM |
2696 | if (!fixP->fx_done) |
2697 | { | |
2698 | ++seg_reloc_count; | |
2699 | if (fixP->fx_addsy == NULL) | |
2700 | fixP->fx_addsy = abs_section_sym; | |
2701 | symbol_mark_used_in_reloc (fixP->fx_addsy); | |
2702 | if (fixP->fx_subsy != NULL) | |
2703 | symbol_mark_used_in_reloc (fixP->fx_subsy); | |
2704 | } | |
2705 | ||
df44284e | 2706 | if (!fixP->fx_bit_fixP && !fixP->fx_no_overflow && fixP->fx_size != 0) |
252b5132 | 2707 | { |
df44284e | 2708 | if (fixP->fx_size < sizeof (valueT)) |
252b5132 | 2709 | { |
b77ad1d4 | 2710 | valueT mask; |
252b5132 | 2711 | |
252b5132 | 2712 | mask = 0; |
efaf0ba4 | 2713 | mask--; /* Set all bits to one. */ |
df44284e | 2714 | mask <<= fixP->fx_size * 8 - (fixP->fx_signed ? 1 : 0); |
b77ad1d4 | 2715 | if ((add_number & mask) != 0 && (add_number & mask) != mask) |
252b5132 RH |
2716 | { |
2717 | char buf[50], buf2[50]; | |
df44284e | 2718 | sprint_value (buf, fragP->fr_address + fixP->fx_where); |
252b5132 RH |
2719 | if (add_number > 1000) |
2720 | sprint_value (buf2, add_number); | |
2721 | else | |
2722 | sprintf (buf2, "%ld", (long) add_number); | |
2723 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
0e389e77 | 2724 | _("value of %s too large for field of %d bytes at %s"), |
df44284e | 2725 | buf2, fixP->fx_size, buf); |
efaf0ba4 | 2726 | } /* Generic error checking. */ |
252b5132 RH |
2727 | } |
2728 | #ifdef WARN_SIGNED_OVERFLOW_WORD | |
2729 | /* Warn if a .word value is too large when treated as a signed | |
2730 | number. We already know it is not too negative. This is to | |
2731 | catch over-large switches generated by gcc on the 68k. */ | |
2732 | if (!flag_signed_overflow_ok | |
df44284e | 2733 | && fixP->fx_size == 2 |
252b5132 RH |
2734 | && add_number > 0x7fff) |
2735 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
0e389e77 | 2736 | _("signed .word overflow; switch may be too large; %ld at 0x%lx"), |
252b5132 | 2737 | (long) add_number, |
df44284e | 2738 | (long) (fragP->fr_address + fixP->fx_where)); |
252b5132 | 2739 | #endif |
efaf0ba4 | 2740 | } /* Not a bit fix. */ |
252b5132 | 2741 | |
252b5132 | 2742 | #ifdef TC_VALIDATE_FIX |
ab9da554 ILT |
2743 | skip: ATTRIBUTE_UNUSED_LABEL |
2744 | ; | |
252b5132 RH |
2745 | #endif |
2746 | #ifdef DEBUG5 | |
2747 | fprintf (stderr, "result:\n"); | |
2748 | print_fixup (fixP); | |
2749 | #endif | |
efaf0ba4 | 2750 | } /* For each fixS in this segment. */ |
252b5132 RH |
2751 | |
2752 | TC_ADJUST_RELOC_COUNT (fixP, seg_reloc_count); | |
2753 | return seg_reloc_count; | |
2754 | } | |
2755 | ||
2756 | #endif /* defined (BFD_ASSEMBLER) || (!defined (BFD) && !defined (OBJ_VMS)) */ | |
2757 | ||
2758 | void | |
d7342424 | 2759 | number_to_chars_bigendian (char *buf, valueT val, int n) |
252b5132 | 2760 | { |
937149dd | 2761 | if (n <= 0) |
252b5132 RH |
2762 | abort (); |
2763 | while (n--) | |
2764 | { | |
2765 | buf[n] = val & 0xff; | |
2766 | val >>= 8; | |
2767 | } | |
2768 | } | |
2769 | ||
2770 | void | |
d7342424 | 2771 | number_to_chars_littleendian (char *buf, valueT val, int n) |
252b5132 | 2772 | { |
937149dd | 2773 | if (n <= 0) |
252b5132 RH |
2774 | abort (); |
2775 | while (n--) | |
2776 | { | |
2777 | *buf++ = val & 0xff; | |
2778 | val >>= 8; | |
2779 | } | |
2780 | } | |
2781 | ||
2782 | void | |
d7342424 | 2783 | write_print_statistics (FILE *file) |
252b5132 | 2784 | { |
6d4d30bb | 2785 | fprintf (file, "fixups: %d\n", n_fixups); |
252b5132 RH |
2786 | } |
2787 | ||
efaf0ba4 | 2788 | /* For debugging. */ |
252b5132 RH |
2789 | extern int indent_level; |
2790 | ||
2791 | void | |
d7342424 | 2792 | print_fixup (fixS *fixp) |
252b5132 RH |
2793 | { |
2794 | indent_level = 1; | |
2795 | fprintf (stderr, "fix %lx %s:%d", (long) fixp, fixp->fx_file, fixp->fx_line); | |
2796 | if (fixp->fx_pcrel) | |
2797 | fprintf (stderr, " pcrel"); | |
2798 | if (fixp->fx_pcrel_adjust) | |
2799 | fprintf (stderr, " pcrel_adjust=%d", fixp->fx_pcrel_adjust); | |
2800 | if (fixp->fx_im_disp) | |
2801 | { | |
2802 | #ifdef TC_NS32K | |
2803 | fprintf (stderr, " im_disp=%d", fixp->fx_im_disp); | |
2804 | #else | |
2805 | fprintf (stderr, " im_disp"); | |
2806 | #endif | |
2807 | } | |
2808 | if (fixp->fx_tcbit) | |
2809 | fprintf (stderr, " tcbit"); | |
2810 | if (fixp->fx_done) | |
2811 | fprintf (stderr, " done"); | |
2812 | fprintf (stderr, "\n size=%d frag=%lx where=%ld offset=%lx addnumber=%lx", | |
2813 | fixp->fx_size, (long) fixp->fx_frag, (long) fixp->fx_where, | |
2814 | (long) fixp->fx_offset, (long) fixp->fx_addnumber); | |
2815 | #ifdef BFD_ASSEMBLER | |
2816 | fprintf (stderr, "\n %s (%d)", bfd_get_reloc_code_name (fixp->fx_r_type), | |
2817 | fixp->fx_r_type); | |
2818 | #else | |
2819 | #ifdef NEED_FX_R_TYPE | |
2820 | fprintf (stderr, " r_type=%d", fixp->fx_r_type); | |
2821 | #endif | |
2822 | #endif | |
2823 | if (fixp->fx_addsy) | |
2824 | { | |
2825 | fprintf (stderr, "\n +<"); | |
2826 | print_symbol_value_1 (stderr, fixp->fx_addsy); | |
2827 | fprintf (stderr, ">"); | |
2828 | } | |
2829 | if (fixp->fx_subsy) | |
2830 | { | |
2831 | fprintf (stderr, "\n -<"); | |
2832 | print_symbol_value_1 (stderr, fixp->fx_subsy); | |
2833 | fprintf (stderr, ">"); | |
2834 | } | |
2835 | fprintf (stderr, "\n"); | |
2836 | #ifdef TC_FIX_DATA_PRINT | |
2837 | TC_FIX_DATA_PRINT (stderr, fixp); | |
2838 | #endif | |
2839 | } |