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252b5132 | 1 | /* write.c - emit .o file |
250d07de | 2 | Copyright (C) 1986-2021 Free Software Foundation, Inc. |
252b5132 RH |
3 | |
4 | This file is part of GAS, the GNU Assembler. | |
5 | ||
6 | GAS is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
ec2655a6 | 8 | the Free Software Foundation; either version 3, or (at your option) |
252b5132 RH |
9 | any later version. |
10 | ||
11 | GAS is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with GAS; see the file COPYING. If not, write to the Free | |
4b4da160 NC |
18 | Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA |
19 | 02110-1301, USA. */ | |
252b5132 | 20 | |
33eaf5de | 21 | /* This thing should be set up to do byte ordering correctly. But... */ |
252b5132 RH |
22 | |
23 | #include "as.h" | |
24 | #include "subsegs.h" | |
25 | #include "obstack.h" | |
26 | #include "output-file.h" | |
220e750f | 27 | #include "dwarf2dbg.h" |
0acf065b | 28 | #include "compress-debug.h" |
252b5132 | 29 | |
252b5132 | 30 | #ifndef TC_FORCE_RELOCATION |
a161fe53 | 31 | #define TC_FORCE_RELOCATION(FIX) \ |
ae6063d4 | 32 | (generic_force_reloc (FIX)) |
252b5132 RH |
33 | #endif |
34 | ||
a161fe53 AM |
35 | #ifndef TC_FORCE_RELOCATION_ABS |
36 | #define TC_FORCE_RELOCATION_ABS(FIX) \ | |
37 | (TC_FORCE_RELOCATION (FIX)) | |
38 | #endif | |
39 | ||
91cb9803 | 40 | #define GENERIC_FORCE_RELOCATION_LOCAL(FIX) \ |
a161fe53 | 41 | (!(FIX)->fx_pcrel \ |
a161fe53 | 42 | || TC_FORCE_RELOCATION (FIX)) |
91cb9803 AM |
43 | #ifndef TC_FORCE_RELOCATION_LOCAL |
44 | #define TC_FORCE_RELOCATION_LOCAL GENERIC_FORCE_RELOCATION_LOCAL | |
a161fe53 AM |
45 | #endif |
46 | ||
91cb9803 AM |
47 | #define GENERIC_FORCE_RELOCATION_SUB_SAME(FIX, SEG) \ |
48 | (!SEG_NORMAL (SEG)) | |
a161fe53 | 49 | #ifndef TC_FORCE_RELOCATION_SUB_SAME |
91cb9803 | 50 | #define TC_FORCE_RELOCATION_SUB_SAME GENERIC_FORCE_RELOCATION_SUB_SAME |
a161fe53 AM |
51 | #endif |
52 | ||
9a97a5d7 AM |
53 | #ifndef md_register_arithmetic |
54 | # define md_register_arithmetic 1 | |
55 | #endif | |
56 | ||
a161fe53 | 57 | #ifndef TC_FORCE_RELOCATION_SUB_ABS |
9a97a5d7 AM |
58 | #define TC_FORCE_RELOCATION_SUB_ABS(FIX, SEG) \ |
59 | (!md_register_arithmetic && (SEG) == reg_section) | |
a161fe53 AM |
60 | #endif |
61 | ||
62 | #ifndef TC_FORCE_RELOCATION_SUB_LOCAL | |
63 | #ifdef DIFF_EXPR_OK | |
5db484ff AM |
64 | #define TC_FORCE_RELOCATION_SUB_LOCAL(FIX, SEG) \ |
65 | (!md_register_arithmetic && (SEG) == reg_section) | |
a161fe53 | 66 | #else |
5db484ff | 67 | #define TC_FORCE_RELOCATION_SUB_LOCAL(FIX, SEG) 1 |
a161fe53 AM |
68 | #endif |
69 | #endif | |
70 | ||
71 | #ifndef TC_VALIDATE_FIX_SUB | |
72 | #ifdef UNDEFINED_DIFFERENCE_OK | |
73 | /* The PA needs this for PIC code generation. */ | |
5db484ff AM |
74 | #define TC_VALIDATE_FIX_SUB(FIX, SEG) \ |
75 | (md_register_arithmetic || (SEG) != reg_section) | |
a161fe53 | 76 | #else |
5db484ff AM |
77 | #define TC_VALIDATE_FIX_SUB(FIX, SEG) \ |
78 | ((md_register_arithmetic || (SEG) != reg_section) \ | |
79 | && ((FIX)->fx_r_type == BFD_RELOC_GPREL32 \ | |
80 | || (FIX)->fx_r_type == BFD_RELOC_GPREL16)) | |
a161fe53 | 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 | ||
c9cd7160 L |
100 | #ifndef TC_FAKE_LABEL |
101 | #define TC_FAKE_LABEL(NAME) (strcmp ((NAME), FAKE_LABEL_NAME) == 0) | |
102 | #endif | |
103 | ||
d31f0f6d AM |
104 | /* Positive values of TC_FX_SIZE_SLACK allow a target to define |
105 | fixups that far past the end of a frag. Having such fixups | |
106 | is of course most most likely a bug in setting fx_size correctly. | |
107 | A negative value disables the fixup check entirely, which is | |
108 | appropriate for something like the Renesas / SuperH SH_COUNT | |
109 | reloc. */ | |
110 | #ifndef TC_FX_SIZE_SLACK | |
111 | #define TC_FX_SIZE_SLACK(FIX) 0 | |
112 | #endif | |
113 | ||
6386f3a7 AM |
114 | /* Used to control final evaluation of expressions. */ |
115 | int finalize_syms = 0; | |
e46d99eb | 116 | |
252b5132 | 117 | int symbol_table_frozen; |
a161fe53 AM |
118 | |
119 | symbolS *abs_section_sym; | |
120 | ||
26346241 AM |
121 | /* Remember the value of dot when parsing expressions. */ |
122 | addressT dot_value; | |
123 | ||
8e723a10 CLT |
124 | /* The frag that dot_value is based from. */ |
125 | fragS *dot_frag; | |
126 | ||
05e9452c AM |
127 | /* Relocs generated by ".reloc" pseudo. */ |
128 | struct reloc_list* reloc_list; | |
129 | ||
d7342424 | 130 | void print_fixup (fixS *); |
252b5132 | 131 | |
252b5132 RH |
132 | /* We generally attach relocs to frag chains. However, after we have |
133 | chained these all together into a segment, any relocs we add after | |
134 | that must be attached to a segment. This will include relocs added | |
135 | in md_estimate_size_for_relax, for example. */ | |
136 | static int frags_chained = 0; | |
252b5132 RH |
137 | |
138 | static int n_fixups; | |
139 | ||
df44284e | 140 | #define RELOC_ENUM enum bfd_reloc_code_real |
df44284e | 141 | |
efaf0ba4 NC |
142 | /* Create a fixS in obstack 'notes'. */ |
143 | ||
252b5132 | 144 | static fixS * |
d7342424 | 145 | fix_new_internal (fragS *frag, /* Which frag? */ |
90bd3c90 AM |
146 | unsigned long where, /* Where in that frag? */ |
147 | unsigned long size, /* 1, 2, or 4 usually. */ | |
d7342424 KH |
148 | symbolS *add_symbol, /* X_add_symbol. */ |
149 | symbolS *sub_symbol, /* X_op_symbol. */ | |
150 | offsetT offset, /* X_add_number. */ | |
151 | int pcrel, /* TRUE if PC-relative relocation. */ | |
032fbb7a | 152 | RELOC_ENUM r_type /* Relocation type. */, |
c865e45b | 153 | int at_beginning) /* Add to the start of the list? */ |
252b5132 RH |
154 | { |
155 | fixS *fixP; | |
156 | ||
157 | n_fixups++; | |
158 | ||
1e9cc1c2 | 159 | fixP = (fixS *) obstack_alloc (¬es, sizeof (fixS)); |
252b5132 RH |
160 | |
161 | fixP->fx_frag = frag; | |
162 | fixP->fx_where = where; | |
163 | fixP->fx_size = size; | |
164 | /* We've made fx_size a narrow field; check that it's wide enough. */ | |
165 | if (fixP->fx_size != size) | |
166 | { | |
90bd3c90 | 167 | as_bad (_("field fx_size too small to hold %lu"), size); |
252b5132 RH |
168 | abort (); |
169 | } | |
170 | fixP->fx_addsy = add_symbol; | |
171 | fixP->fx_subsy = sub_symbol; | |
172 | fixP->fx_offset = offset; | |
26346241 | 173 | fixP->fx_dot_value = dot_value; |
8e723a10 | 174 | fixP->fx_dot_frag = dot_frag; |
252b5132 | 175 | fixP->fx_pcrel = pcrel; |
252b5132 | 176 | fixP->fx_r_type = r_type; |
252b5132 | 177 | fixP->fx_pcrel_adjust = 0; |
252b5132 RH |
178 | fixP->fx_addnumber = 0; |
179 | fixP->fx_tcbit = 0; | |
20ee54e8 | 180 | fixP->fx_tcbit2 = 0; |
252b5132 RH |
181 | fixP->fx_done = 0; |
182 | fixP->fx_no_overflow = 0; | |
183 | fixP->fx_signed = 0; | |
184 | ||
185 | #ifdef USING_CGEN | |
186 | fixP->fx_cgen.insn = NULL; | |
187 | fixP->fx_cgen.opinfo = 0; | |
188 | #endif | |
189 | ||
190 | #ifdef TC_FIX_TYPE | |
efaf0ba4 | 191 | TC_INIT_FIX_DATA (fixP); |
252b5132 RH |
192 | #endif |
193 | ||
3b4dbbbf | 194 | fixP->fx_file = as_where (&fixP->fx_line); |
252b5132 | 195 | |
252b5132 RH |
196 | { |
197 | ||
252b5132 RH |
198 | fixS **seg_fix_rootP = (frags_chained |
199 | ? &seg_info (now_seg)->fix_root | |
200 | : &frchain_now->fix_root); | |
201 | fixS **seg_fix_tailP = (frags_chained | |
202 | ? &seg_info (now_seg)->fix_tail | |
203 | : &frchain_now->fix_tail); | |
252b5132 | 204 | |
c865e45b RS |
205 | if (at_beginning) |
206 | { | |
207 | fixP->fx_next = *seg_fix_rootP; | |
208 | *seg_fix_rootP = fixP; | |
209 | if (fixP->fx_next == NULL) | |
210 | *seg_fix_tailP = fixP; | |
211 | } | |
252b5132 | 212 | else |
c865e45b RS |
213 | { |
214 | fixP->fx_next = NULL; | |
215 | if (*seg_fix_tailP) | |
216 | (*seg_fix_tailP)->fx_next = fixP; | |
217 | else | |
218 | *seg_fix_rootP = fixP; | |
219 | *seg_fix_tailP = fixP; | |
220 | } | |
252b5132 RH |
221 | } |
222 | ||
223 | return fixP; | |
224 | } | |
225 | ||
226 | /* Create a fixup relative to a symbol (plus a constant). */ | |
227 | ||
228 | fixS * | |
90bd3c90 AM |
229 | fix_new (fragS *frag, /* Which frag? */ |
230 | unsigned long where, /* Where in that frag? */ | |
231 | unsigned long size, /* 1, 2, or 4 usually. */ | |
232 | symbolS *add_symbol, /* X_add_symbol. */ | |
d7342424 KH |
233 | offsetT offset, /* X_add_number. */ |
234 | int pcrel, /* TRUE if PC-relative relocation. */ | |
235 | RELOC_ENUM r_type /* Relocation type. */) | |
252b5132 RH |
236 | { |
237 | return fix_new_internal (frag, where, size, add_symbol, | |
c865e45b | 238 | (symbolS *) NULL, offset, pcrel, r_type, FALSE); |
252b5132 RH |
239 | } |
240 | ||
241 | /* Create a fixup for an expression. Currently we only support fixups | |
242 | for difference expressions. That is itself more than most object | |
243 | file formats support anyhow. */ | |
244 | ||
245 | fixS * | |
d7342424 | 246 | fix_new_exp (fragS *frag, /* Which frag? */ |
90bd3c90 AM |
247 | unsigned long where, /* Where in that frag? */ |
248 | unsigned long size, /* 1, 2, or 4 usually. */ | |
d7342424 KH |
249 | expressionS *exp, /* Expression. */ |
250 | int pcrel, /* TRUE if PC-relative relocation. */ | |
251 | RELOC_ENUM r_type /* Relocation type. */) | |
252b5132 RH |
252 | { |
253 | symbolS *add = NULL; | |
254 | symbolS *sub = NULL; | |
255 | offsetT off = 0; | |
256 | ||
257 | switch (exp->X_op) | |
258 | { | |
259 | case O_absent: | |
260 | break; | |
261 | ||
37006e43 NC |
262 | case O_register: |
263 | as_bad (_("register value used as expression")); | |
264 | break; | |
265 | ||
252b5132 RH |
266 | case O_add: |
267 | /* This comes up when _GLOBAL_OFFSET_TABLE_+(.-L0) is read, if | |
268 | the difference expression cannot immediately be reduced. */ | |
269 | { | |
270 | symbolS *stmp = make_expr_symbol (exp); | |
58a77e41 | 271 | |
252b5132 RH |
272 | exp->X_op = O_symbol; |
273 | exp->X_op_symbol = 0; | |
274 | exp->X_add_symbol = stmp; | |
275 | exp->X_add_number = 0; | |
58a77e41 | 276 | |
252b5132 RH |
277 | return fix_new_exp (frag, where, size, exp, pcrel, r_type); |
278 | } | |
279 | ||
280 | case O_symbol_rva: | |
281 | add = exp->X_add_symbol; | |
282 | off = exp->X_add_number; | |
252b5132 | 283 | r_type = BFD_RELOC_RVA; |
252b5132 RH |
284 | break; |
285 | ||
286 | case O_uminus: | |
287 | sub = exp->X_add_symbol; | |
288 | off = exp->X_add_number; | |
289 | break; | |
290 | ||
291 | case O_subtract: | |
292 | sub = exp->X_op_symbol; | |
293 | /* Fall through. */ | |
294 | case O_symbol: | |
295 | add = exp->X_add_symbol; | |
efaf0ba4 | 296 | /* Fall through. */ |
252b5132 RH |
297 | case O_constant: |
298 | off = exp->X_add_number; | |
299 | break; | |
300 | ||
301 | default: | |
302 | add = make_expr_symbol (exp); | |
303 | break; | |
304 | } | |
305 | ||
c865e45b RS |
306 | return fix_new_internal (frag, where, size, add, sub, off, pcrel, |
307 | r_type, FALSE); | |
308 | } | |
309 | ||
310 | /* Create a fixup at the beginning of FRAG. The arguments are the same | |
311 | as for fix_new, except that WHERE is implicitly 0. */ | |
312 | ||
313 | fixS * | |
90bd3c90 | 314 | fix_at_start (fragS *frag, unsigned long size, symbolS *add_symbol, |
c865e45b RS |
315 | offsetT offset, int pcrel, RELOC_ENUM r_type) |
316 | { | |
317 | return fix_new_internal (frag, 0, size, add_symbol, | |
318 | (symbolS *) NULL, offset, pcrel, r_type, TRUE); | |
252b5132 RH |
319 | } |
320 | ||
ae6063d4 AM |
321 | /* Generic function to determine whether a fixup requires a relocation. */ |
322 | int | |
d7342424 | 323 | generic_force_reloc (fixS *fix) |
ae6063d4 | 324 | { |
ae6063d4 AM |
325 | if (fix->fx_r_type == BFD_RELOC_VTABLE_INHERIT |
326 | || fix->fx_r_type == BFD_RELOC_VTABLE_ENTRY) | |
327 | return 1; | |
7be1c489 | 328 | |
61e192bf NC |
329 | if (fix->fx_addsy == NULL) |
330 | return 0; | |
331 | ||
ae6063d4 AM |
332 | return S_FORCE_RELOC (fix->fx_addsy, fix->fx_subsy == NULL); |
333 | } | |
334 | ||
252b5132 RH |
335 | /* Append a string onto another string, bumping the pointer along. */ |
336 | void | |
d7342424 | 337 | append (char **charPP, char *fromP, unsigned long length) |
252b5132 | 338 | { |
efaf0ba4 | 339 | /* Don't trust memcpy() of 0 chars. */ |
252b5132 RH |
340 | if (length == 0) |
341 | return; | |
342 | ||
343 | memcpy (*charPP, fromP, length); | |
344 | *charPP += length; | |
345 | } | |
346 | ||
efaf0ba4 NC |
347 | /* This routine records the largest alignment seen for each segment. |
348 | If the beginning of the segment is aligned on the worst-case | |
349 | boundary, all of the other alignments within it will work. At | |
350 | least one object format really uses this info. */ | |
351 | ||
252b5132 | 352 | void |
d7342424 KH |
353 | record_alignment (/* Segment to which alignment pertains. */ |
354 | segT seg, | |
355 | /* Alignment, as a power of 2 (e.g., 1 => 2-byte | |
356 | boundary, 2 => 4-byte boundary, etc.) */ | |
9136aa49 | 357 | unsigned int align) |
252b5132 RH |
358 | { |
359 | if (seg == absolute_section) | |
360 | return; | |
7be1c489 | 361 | |
fd361982 AM |
362 | if (align > bfd_section_alignment (seg)) |
363 | bfd_set_section_alignment (seg, align); | |
252b5132 RH |
364 | } |
365 | ||
0a9ef439 | 366 | int |
d7342424 | 367 | get_recorded_alignment (segT seg) |
0a9ef439 RH |
368 | { |
369 | if (seg == absolute_section) | |
370 | return 0; | |
7be1c489 | 371 | |
fd361982 | 372 | return bfd_section_alignment (seg); |
0a9ef439 RH |
373 | } |
374 | ||
252b5132 RH |
375 | /* Reset the section indices after removing the gas created sections. */ |
376 | ||
377 | static void | |
e7ff5c73 | 378 | renumber_sections (bfd *abfd ATTRIBUTE_UNUSED, asection *sec, void *countparg) |
252b5132 RH |
379 | { |
380 | int *countp = (int *) countparg; | |
381 | ||
382 | sec->index = *countp; | |
383 | ++*countp; | |
384 | } | |
385 | ||
252b5132 | 386 | static fragS * |
d7342424 | 387 | chain_frchains_together_1 (segT section, struct frchain *frchp) |
252b5132 RH |
388 | { |
389 | fragS dummy, *prev_frag = &dummy; | |
252b5132 | 390 | fixS fix_dummy, *prev_fix = &fix_dummy; |
252b5132 | 391 | |
c9049d30 | 392 | for (; frchp; frchp = frchp->frch_next) |
252b5132 RH |
393 | { |
394 | prev_frag->fr_next = frchp->frch_root; | |
395 | prev_frag = frchp->frch_last; | |
9c2799c2 | 396 | gas_assert (prev_frag->fr_type != 0); |
252b5132 RH |
397 | if (frchp->fix_root != (fixS *) NULL) |
398 | { | |
399 | if (seg_info (section)->fix_root == (fixS *) NULL) | |
400 | seg_info (section)->fix_root = frchp->fix_root; | |
401 | prev_fix->fx_next = frchp->fix_root; | |
402 | seg_info (section)->fix_tail = frchp->fix_tail; | |
403 | prev_fix = frchp->fix_tail; | |
404 | } | |
252b5132 | 405 | } |
4fc0b46e AM |
406 | gas_assert (prev_frag != &dummy |
407 | && prev_frag->fr_type != 0); | |
252b5132 RH |
408 | prev_frag->fr_next = 0; |
409 | return prev_frag; | |
410 | } | |
411 | ||
252b5132 | 412 | static void |
d7342424 KH |
413 | chain_frchains_together (bfd *abfd ATTRIBUTE_UNUSED, |
414 | segT section, | |
e7ff5c73 | 415 | void *xxx ATTRIBUTE_UNUSED) |
252b5132 RH |
416 | { |
417 | segment_info_type *info; | |
418 | ||
419 | /* BFD may have introduced its own sections without using | |
420 | subseg_new, so it is possible that seg_info is NULL. */ | |
421 | info = seg_info (section); | |
422 | if (info != (segment_info_type *) NULL) | |
efaf0ba4 NC |
423 | info->frchainP->frch_last |
424 | = chain_frchains_together_1 (section, info->frchainP); | |
252b5132 RH |
425 | |
426 | /* Now that we've chained the frags together, we must add new fixups | |
427 | to the segment, not to the frag chain. */ | |
428 | frags_chained = 1; | |
429 | } | |
430 | ||
252b5132 | 431 | static void |
d7342424 | 432 | cvt_frag_to_fill (segT sec ATTRIBUTE_UNUSED, fragS *fragP) |
252b5132 RH |
433 | { |
434 | switch (fragP->fr_type) | |
435 | { | |
62a02d25 L |
436 | case rs_space_nop: |
437 | goto skip_align; | |
252b5132 RH |
438 | case rs_align: |
439 | case rs_align_code: | |
0a9ef439 | 440 | case rs_align_test: |
252b5132 RH |
441 | case rs_org: |
442 | case rs_space: | |
443 | #ifdef HANDLE_ALIGN | |
444 | HANDLE_ALIGN (fragP); | |
445 | #endif | |
dc1e8a47 | 446 | skip_align: |
252b5132 RH |
447 | know (fragP->fr_next != NULL); |
448 | fragP->fr_offset = (fragP->fr_next->fr_address | |
449 | - fragP->fr_address | |
450 | - fragP->fr_fix) / fragP->fr_var; | |
451 | if (fragP->fr_offset < 0) | |
452 | { | |
14ad458a | 453 | as_bad_where (fragP->fr_file, fragP->fr_line, |
8f065d3b | 454 | _("attempt to .org/.space/.nops backwards? (%ld)"), |
14ad458a | 455 | (long) fragP->fr_offset); |
3f3cdb03 | 456 | fragP->fr_offset = 0; |
252b5132 | 457 | } |
62a02d25 L |
458 | if (fragP->fr_type == rs_space_nop) |
459 | fragP->fr_type = rs_fill_nop; | |
460 | else | |
461 | fragP->fr_type = rs_fill; | |
252b5132 RH |
462 | break; |
463 | ||
464 | case rs_fill: | |
62a02d25 | 465 | case rs_fill_nop: |
252b5132 RH |
466 | break; |
467 | ||
468 | case rs_leb128: | |
469 | { | |
470 | valueT value = S_GET_VALUE (fragP->fr_symbol); | |
471 | int size; | |
472 | ||
ba8826a8 AO |
473 | if (!S_IS_DEFINED (fragP->fr_symbol)) |
474 | { | |
475 | as_bad_where (fragP->fr_file, fragP->fr_line, | |
476 | _("leb128 operand is an undefined symbol: %s"), | |
477 | S_GET_NAME (fragP->fr_symbol)); | |
478 | } | |
479 | ||
252b5132 RH |
480 | size = output_leb128 (fragP->fr_literal + fragP->fr_fix, value, |
481 | fragP->fr_subtype); | |
482 | ||
483 | fragP->fr_fix += size; | |
484 | fragP->fr_type = rs_fill; | |
485 | fragP->fr_var = 0; | |
486 | fragP->fr_offset = 0; | |
487 | fragP->fr_symbol = NULL; | |
488 | } | |
489 | break; | |
490 | ||
491 | case rs_cfa: | |
492 | eh_frame_convert_frag (fragP); | |
493 | break; | |
494 | ||
220e750f RH |
495 | case rs_dwarf2dbg: |
496 | dwarf2dbg_convert_frag (fragP); | |
497 | break; | |
498 | ||
252b5132 | 499 | case rs_machine_dependent: |
252b5132 | 500 | md_convert_frag (stdoutput, sec, fragP); |
252b5132 | 501 | |
9c2799c2 | 502 | gas_assert (fragP->fr_next == NULL |
871a6bd2 AM |
503 | || (fragP->fr_next->fr_address - fragP->fr_address |
504 | == fragP->fr_fix)); | |
252b5132 | 505 | |
efaf0ba4 NC |
506 | /* After md_convert_frag, we make the frag into a ".space 0". |
507 | md_convert_frag() should set up any fixSs and constants | |
508 | required. */ | |
252b5132 RH |
509 | frag_wane (fragP); |
510 | break; | |
511 | ||
512 | #ifndef WORKING_DOT_WORD | |
513 | case rs_broken_word: | |
514 | { | |
515 | struct broken_word *lie; | |
516 | ||
517 | if (fragP->fr_subtype) | |
518 | { | |
519 | fragP->fr_fix += md_short_jump_size; | |
520 | for (lie = (struct broken_word *) (fragP->fr_symbol); | |
521 | lie && lie->dispfrag == fragP; | |
522 | lie = lie->next_broken_word) | |
523 | if (lie->added == 1) | |
524 | fragP->fr_fix += md_long_jump_size; | |
525 | } | |
526 | frag_wane (fragP); | |
527 | } | |
528 | break; | |
529 | #endif | |
530 | ||
531 | default: | |
532 | BAD_CASE (fragP->fr_type); | |
533 | break; | |
534 | } | |
09b935ac AM |
535 | #ifdef md_frag_check |
536 | md_frag_check (fragP); | |
537 | #endif | |
252b5132 RH |
538 | } |
539 | ||
32638454 AM |
540 | struct relax_seg_info |
541 | { | |
542 | int pass; | |
543 | int changed; | |
544 | }; | |
d7342424 | 545 | |
252b5132 | 546 | static void |
32638454 | 547 | relax_seg (bfd *abfd ATTRIBUTE_UNUSED, asection *sec, void *xxx) |
e46d99eb AM |
548 | { |
549 | segment_info_type *seginfo = seg_info (sec); | |
32638454 | 550 | struct relax_seg_info *info = (struct relax_seg_info *) xxx; |
e46d99eb AM |
551 | |
552 | if (seginfo && seginfo->frchainP | |
32638454 AM |
553 | && relax_segment (seginfo->frchainP->frch_root, sec, info->pass)) |
554 | info->changed = 1; | |
e46d99eb AM |
555 | } |
556 | ||
e46d99eb | 557 | static void |
fd361982 | 558 | size_seg (bfd *abfd ATTRIBUTE_UNUSED, asection *sec, void *xxx ATTRIBUTE_UNUSED) |
252b5132 RH |
559 | { |
560 | flagword flags; | |
561 | fragS *fragp; | |
562 | segment_info_type *seginfo; | |
563 | int x; | |
564 | valueT size, newsize; | |
565 | ||
566 | subseg_change (sec, 0); | |
567 | ||
252b5132 RH |
568 | seginfo = seg_info (sec); |
569 | if (seginfo && seginfo->frchainP) | |
570 | { | |
252b5132 RH |
571 | for (fragp = seginfo->frchainP->frch_root; fragp; fragp = fragp->fr_next) |
572 | cvt_frag_to_fill (sec, fragp); | |
573 | for (fragp = seginfo->frchainP->frch_root; | |
574 | fragp->fr_next; | |
575 | fragp = fragp->fr_next) | |
efaf0ba4 NC |
576 | /* Walk to last elt. */ |
577 | ; | |
252b5132 RH |
578 | size = fragp->fr_address + fragp->fr_fix; |
579 | } | |
580 | else | |
581 | size = 0; | |
582 | ||
fd361982 AM |
583 | flags = bfd_section_flags (sec); |
584 | if (size == 0 && bfd_section_size (sec) != 0 && | |
f3d2b04b KT |
585 | (flags & SEC_HAS_CONTENTS) != 0) |
586 | return; | |
e46d99eb | 587 | |
252b5132 RH |
588 | if (size > 0 && ! seginfo->bss) |
589 | flags |= SEC_HAS_CONTENTS; | |
590 | ||
e5435dec | 591 | flags &= ~SEC_RELOC; |
fd361982 | 592 | x = bfd_set_section_flags (sec, flags); |
9c2799c2 | 593 | gas_assert (x); |
252b5132 | 594 | |
2edb36e7 NC |
595 | /* If permitted, allow the backend to pad out the section |
596 | to some alignment boundary. */ | |
597 | if (do_not_pad_sections_to_alignment) | |
598 | newsize = size; | |
599 | else | |
600 | newsize = md_section_align (sec, size); | |
fd361982 | 601 | x = bfd_set_section_size (sec, newsize); |
9c2799c2 | 602 | gas_assert (x); |
252b5132 RH |
603 | |
604 | /* If the size had to be rounded up, add some padding in the last | |
605 | non-empty frag. */ | |
9c2799c2 | 606 | gas_assert (newsize >= size); |
252b5132 RH |
607 | if (size != newsize) |
608 | { | |
609 | fragS *last = seginfo->frchainP->frch_last; | |
610 | fragp = seginfo->frchainP->frch_root; | |
611 | while (fragp->fr_next != last) | |
612 | fragp = fragp->fr_next; | |
613 | last->fr_address = size; | |
18e1d487 AM |
614 | if ((newsize - size) % fragp->fr_var == 0) |
615 | fragp->fr_offset += (newsize - size) / fragp->fr_var; | |
616 | else | |
617 | /* If we hit this abort, it's likely due to subsegs_finish not | |
618 | providing sufficient alignment on the last frag, and the | |
619 | machine dependent code using alignment frags with fr_var | |
620 | greater than 1. */ | |
621 | abort (); | |
252b5132 RH |
622 | } |
623 | ||
624 | #ifdef tc_frob_section | |
625 | tc_frob_section (sec); | |
626 | #endif | |
627 | #ifdef obj_frob_section | |
628 | obj_frob_section (sec); | |
629 | #endif | |
630 | } | |
631 | ||
632 | #ifdef DEBUG2 | |
633 | static void | |
988392e2 | 634 | dump_section_relocs (bfd *abfd ATTRIBUTE_UNUSED, asection *sec, FILE *stream) |
252b5132 | 635 | { |
252b5132 RH |
636 | segment_info_type *seginfo = seg_info (sec); |
637 | fixS *fixp = seginfo->fix_root; | |
638 | ||
639 | if (!fixp) | |
640 | return; | |
641 | ||
642 | fprintf (stream, "sec %s relocs:\n", sec->name); | |
643 | while (fixp) | |
644 | { | |
645 | symbolS *s = fixp->fx_addsy; | |
e723ef7c ILT |
646 | |
647 | fprintf (stream, " %08lx: type %d ", (unsigned long) fixp, | |
648 | (int) fixp->fx_r_type); | |
649 | if (s == NULL) | |
650 | fprintf (stream, "no sym\n"); | |
651 | else | |
252b5132 | 652 | { |
e723ef7c ILT |
653 | print_symbol_value_1 (stream, s); |
654 | fprintf (stream, "\n"); | |
252b5132 | 655 | } |
252b5132 RH |
656 | fixp = fixp->fx_next; |
657 | } | |
658 | } | |
659 | #else | |
660 | #define dump_section_relocs(ABFD,SEC,STREAM) ((void) 0) | |
661 | #endif | |
662 | ||
663 | #ifndef EMIT_SECTION_SYMBOLS | |
664 | #define EMIT_SECTION_SYMBOLS 1 | |
665 | #endif | |
666 | ||
05e9452c AM |
667 | /* Resolve U.A.OFFSET_SYM and U.A.SYM fields of RELOC_LIST entries, |
668 | and check for validity. Convert RELOC_LIST from using U.A fields | |
669 | to U.B fields. */ | |
670 | static void | |
671 | resolve_reloc_expr_symbols (void) | |
672 | { | |
080f9e4f | 673 | bfd_vma addr_mask = 1; |
05e9452c AM |
674 | struct reloc_list *r; |
675 | ||
080f9e4f MR |
676 | /* Avoid a shift by the width of type. */ |
677 | addr_mask <<= bfd_arch_bits_per_address (stdoutput) - 1; | |
678 | addr_mask <<= 1; | |
679 | addr_mask -= 1; | |
680 | ||
05e9452c AM |
681 | for (r = reloc_list; r; r = r->next) |
682 | { | |
080f9e4f | 683 | reloc_howto_type *howto = r->u.a.howto; |
05e9452c AM |
684 | expressionS *symval; |
685 | symbolS *sym; | |
686 | bfd_vma offset, addend; | |
687 | asection *sec; | |
05e9452c AM |
688 | |
689 | resolve_symbol_value (r->u.a.offset_sym); | |
690 | symval = symbol_get_value_expression (r->u.a.offset_sym); | |
691 | ||
692 | offset = 0; | |
693 | sym = NULL; | |
694 | if (symval->X_op == O_constant) | |
695 | sym = r->u.a.offset_sym; | |
696 | else if (symval->X_op == O_symbol) | |
697 | { | |
698 | sym = symval->X_add_symbol; | |
699 | offset = symval->X_add_number; | |
700 | symval = symbol_get_value_expression (symval->X_add_symbol); | |
701 | } | |
702 | if (sym == NULL | |
703 | || symval->X_op != O_constant | |
704 | || (sec = S_GET_SEGMENT (sym)) == NULL | |
705 | || !SEG_NORMAL (sec)) | |
706 | { | |
707 | as_bad_where (r->file, r->line, _("invalid offset expression")); | |
708 | sec = NULL; | |
709 | } | |
710 | else | |
711 | offset += S_GET_VALUE (sym); | |
712 | ||
713 | sym = NULL; | |
714 | addend = r->u.a.addend; | |
715 | if (r->u.a.sym != NULL) | |
716 | { | |
717 | resolve_symbol_value (r->u.a.sym); | |
718 | symval = symbol_get_value_expression (r->u.a.sym); | |
719 | if (symval->X_op == O_constant) | |
720 | sym = r->u.a.sym; | |
721 | else if (symval->X_op == O_symbol) | |
722 | { | |
723 | sym = symval->X_add_symbol; | |
724 | addend += symval->X_add_number; | |
725 | symval = symbol_get_value_expression (symval->X_add_symbol); | |
726 | } | |
727 | if (symval->X_op != O_constant) | |
728 | { | |
729 | as_bad_where (r->file, r->line, _("invalid reloc expression")); | |
730 | sec = NULL; | |
731 | } | |
2578f2f3 | 732 | else if (sym != NULL && sec != NULL) |
7230378d | 733 | { |
080f9e4f MR |
734 | /* Convert relocs against local symbols to refer to the |
735 | corresponding section symbol plus offset instead. Keep | |
736 | PC-relative relocs of the REL variety intact though to | |
737 | prevent the offset from overflowing the relocated field, | |
738 | unless it has enough bits to cover the whole address | |
739 | space. */ | |
740 | if (S_IS_LOCAL (sym) && !symbol_section_p (sym) | |
d6101ac2 MR |
741 | && (sec->use_rela_p |
742 | || (howto->partial_inplace | |
743 | && (!howto->pc_relative | |
744 | || howto->src_mask == addr_mask)))) | |
7230378d AM |
745 | { |
746 | asection *symsec = S_GET_SEGMENT (sym); | |
747 | if (!(((symsec->flags & SEC_MERGE) != 0 | |
748 | && addend != 0) | |
749 | || (symsec->flags & SEC_THREAD_LOCAL) != 0)) | |
750 | { | |
751 | addend += S_GET_VALUE (sym); | |
752 | sym = section_symbol (symsec); | |
753 | } | |
754 | } | |
755 | symbol_mark_used_in_reloc (sym); | |
756 | } | |
05e9452c AM |
757 | } |
758 | if (sym == NULL) | |
759 | { | |
760 | if (abs_section_sym == NULL) | |
761 | abs_section_sym = section_symbol (absolute_section); | |
762 | sym = abs_section_sym; | |
763 | } | |
764 | ||
05e9452c AM |
765 | r->u.b.sec = sec; |
766 | r->u.b.s = symbol_get_bfdsym (sym); | |
767 | r->u.b.r.sym_ptr_ptr = &r->u.b.s; | |
768 | r->u.b.r.address = offset; | |
769 | r->u.b.r.addend = addend; | |
770 | r->u.b.r.howto = howto; | |
771 | } | |
772 | } | |
773 | ||
df44284e AM |
774 | /* This pass over fixups decides whether symbols can be replaced with |
775 | section symbols. */ | |
776 | ||
252b5132 | 777 | static void |
d7342424 KH |
778 | adjust_reloc_syms (bfd *abfd ATTRIBUTE_UNUSED, |
779 | asection *sec, | |
e7ff5c73 | 780 | void *xxx ATTRIBUTE_UNUSED) |
252b5132 RH |
781 | { |
782 | segment_info_type *seginfo = seg_info (sec); | |
783 | fixS *fixp; | |
784 | ||
785 | if (seginfo == NULL) | |
786 | return; | |
787 | ||
788 | dump_section_relocs (abfd, sec, stderr); | |
789 | ||
790 | for (fixp = seginfo->fix_root; fixp; fixp = fixp->fx_next) | |
791 | if (fixp->fx_done) | |
efaf0ba4 NC |
792 | /* Ignore it. */ |
793 | ; | |
252b5132 RH |
794 | else if (fixp->fx_addsy) |
795 | { | |
796 | symbolS *sym; | |
797 | asection *symsec; | |
798 | ||
799 | #ifdef DEBUG5 | |
800 | fprintf (stderr, "\n\nadjusting fixup:\n"); | |
801 | print_fixup (fixp); | |
802 | #endif | |
803 | ||
804 | sym = fixp->fx_addsy; | |
805 | ||
806 | /* All symbols should have already been resolved at this | |
807 | point. It is possible to see unresolved expression | |
808 | symbols, though, since they are not in the regular symbol | |
809 | table. */ | |
df44284e | 810 | resolve_symbol_value (sym); |
efaf0ba4 | 811 | |
49309057 | 812 | if (fixp->fx_subsy != NULL) |
6386f3a7 | 813 | resolve_symbol_value (fixp->fx_subsy); |
252b5132 | 814 | |
60938e80 L |
815 | /* If this symbol is equated to an undefined or common symbol, |
816 | convert the fixup to being against that symbol. */ | |
b4b24b79 AM |
817 | while (symbol_equated_reloc_p (sym) |
818 | || S_IS_WEAKREFR (sym)) | |
252b5132 | 819 | { |
b4b24b79 AM |
820 | symbolS *newsym = symbol_get_value_expression (sym)->X_add_symbol; |
821 | if (sym == newsym) | |
822 | break; | |
49309057 | 823 | fixp->fx_offset += symbol_get_value_expression (sym)->X_add_number; |
b4b24b79 AM |
824 | fixp->fx_addsy = newsym; |
825 | sym = newsym; | |
252b5132 RH |
826 | } |
827 | ||
df44284e | 828 | if (symbol_mri_common_p (sym)) |
252b5132 | 829 | { |
b4b24b79 AM |
830 | fixp->fx_offset += S_GET_VALUE (sym); |
831 | fixp->fx_addsy = symbol_get_value_expression (sym)->X_add_symbol; | |
df44284e | 832 | continue; |
252b5132 RH |
833 | } |
834 | ||
a161fe53 AM |
835 | /* If the symbol is undefined, common, weak, or global (ELF |
836 | shared libs), we can't replace it with the section symbol. */ | |
ae6063d4 | 837 | if (S_FORCE_RELOC (fixp->fx_addsy, 1)) |
a161fe53 AM |
838 | continue; |
839 | ||
840 | /* Is there some other (target cpu dependent) reason we can't adjust | |
841 | this one? (E.g. relocations involving function addresses on | |
842 | the PA. */ | |
843 | #ifdef tc_fix_adjustable | |
844 | if (! tc_fix_adjustable (fixp)) | |
845 | continue; | |
846 | #endif | |
847 | ||
848 | /* Since we're reducing to section symbols, don't attempt to reduce | |
849 | anything that's already using one. */ | |
850 | if (symbol_section_p (sym)) | |
d1bcae83 L |
851 | { |
852 | /* Mark the section symbol used in relocation so that it will | |
853 | be included in the symbol table. */ | |
854 | symbol_mark_used_in_reloc (sym); | |
855 | continue; | |
856 | } | |
a161fe53 | 857 | |
252b5132 | 858 | symsec = S_GET_SEGMENT (sym); |
252b5132 RH |
859 | if (symsec == NULL) |
860 | abort (); | |
efaf0ba4 | 861 | |
a841bdf5 AM |
862 | if (bfd_is_abs_section (symsec) |
863 | || symsec == reg_section) | |
252b5132 | 864 | { |
a161fe53 | 865 | /* The fixup_segment routine normally will not use this |
b4b24b79 | 866 | symbol in a relocation. */ |
df44284e | 867 | continue; |
252b5132 RH |
868 | } |
869 | ||
7565ed77 | 870 | /* Don't try to reduce relocs which refer to non-local symbols |
b4b24b79 AM |
871 | in .linkonce sections. It can lead to confusion when a |
872 | debugging section refers to a .linkonce section. I hope | |
873 | this will always be correct. */ | |
7565ed77 | 874 | if (symsec != sec && ! S_IS_LOCAL (sym)) |
252b5132 | 875 | { |
a161fe53 AM |
876 | if ((symsec->flags & SEC_LINK_ONCE) != 0 |
877 | || (IS_ELF | |
878 | /* The GNU toolchain uses an extension for ELF: a | |
879 | section beginning with the magic string | |
880 | .gnu.linkonce is a linkonce section. */ | |
881 | && strncmp (segment_name (symsec), ".gnu.linkonce", | |
882 | sizeof ".gnu.linkonce" - 1) == 0)) | |
883 | continue; | |
252b5132 | 884 | } |
f7460f5f JJ |
885 | |
886 | /* Never adjust a reloc against local symbol in a merge section | |
887 | with non-zero addend. */ | |
5045ec7a AM |
888 | if ((symsec->flags & SEC_MERGE) != 0 |
889 | && (fixp->fx_offset != 0 || fixp->fx_subsy != NULL)) | |
a161fe53 | 890 | continue; |
13ae64f3 JJ |
891 | |
892 | /* Never adjust a reloc against TLS local symbol. */ | |
df44284e | 893 | if ((symsec->flags & SEC_THREAD_LOCAL) != 0) |
a161fe53 | 894 | continue; |
252b5132 | 895 | |
a161fe53 | 896 | /* We refetch the segment when calling section_symbol, rather |
252b5132 | 897 | than using symsec, because S_GET_VALUE may wind up changing |
efaf0ba4 | 898 | the section when it calls resolve_symbol_value. */ |
252b5132 RH |
899 | fixp->fx_offset += S_GET_VALUE (sym); |
900 | fixp->fx_addsy = section_symbol (S_GET_SEGMENT (sym)); | |
e723ef7c ILT |
901 | #ifdef DEBUG5 |
902 | fprintf (stderr, "\nadjusted fixup:\n"); | |
903 | print_fixup (fixp); | |
904 | #endif | |
252b5132 | 905 | } |
252b5132 RH |
906 | |
907 | dump_section_relocs (abfd, sec, stderr); | |
908 | } | |
909 | ||
e7ff5c73 AM |
910 | /* fixup_segment() |
911 | ||
912 | Go through all the fixS's in a segment and see which ones can be | |
913 | handled now. (These consist of fixS where we have since discovered | |
914 | the value of a symbol, or the address of the frag involved.) | |
915 | For each one, call md_apply_fix to put the fix into the frag data. | |
89d67ed9 AM |
916 | Ones that we couldn't completely handle here will be output later |
917 | by emit_relocations. */ | |
e7ff5c73 | 918 | |
89d67ed9 | 919 | static void |
e7ff5c73 AM |
920 | fixup_segment (fixS *fixP, segT this_segment) |
921 | { | |
e7ff5c73 AM |
922 | valueT add_number; |
923 | fragS *fragP; | |
924 | segT add_symbol_segment = absolute_section; | |
925 | ||
926 | if (fixP != NULL && abs_section_sym == NULL) | |
927 | abs_section_sym = section_symbol (absolute_section); | |
928 | ||
929 | /* If the linker is doing the relaxing, we must not do any fixups. | |
930 | ||
931 | Well, strictly speaking that's not true -- we could do any that | |
a8eb42a8 | 932 | are PC-relative and don't cross regions that could change size. */ |
e7ff5c73 AM |
933 | if (linkrelax && TC_LINKRELAX_FIXUP (this_segment)) |
934 | { | |
935 | for (; fixP; fixP = fixP->fx_next) | |
936 | if (!fixP->fx_done) | |
937 | { | |
938 | if (fixP->fx_addsy == NULL) | |
939 | { | |
940 | /* There was no symbol required by this relocation. | |
941 | However, BFD doesn't really handle relocations | |
942 | without symbols well. So fake up a local symbol in | |
943 | the absolute section. */ | |
944 | fixP->fx_addsy = abs_section_sym; | |
945 | } | |
946 | symbol_mark_used_in_reloc (fixP->fx_addsy); | |
947 | if (fixP->fx_subsy != NULL) | |
948 | symbol_mark_used_in_reloc (fixP->fx_subsy); | |
e7ff5c73 | 949 | } |
89d67ed9 | 950 | return; |
e7ff5c73 AM |
951 | } |
952 | ||
953 | for (; fixP; fixP = fixP->fx_next) | |
954 | { | |
955 | #ifdef DEBUG5 | |
956 | fprintf (stderr, "\nprocessing fixup:\n"); | |
957 | print_fixup (fixP); | |
958 | #endif | |
959 | ||
960 | fragP = fixP->fx_frag; | |
961 | know (fragP); | |
962 | #ifdef TC_VALIDATE_FIX | |
963 | TC_VALIDATE_FIX (fixP, this_segment, skip); | |
964 | #endif | |
965 | add_number = fixP->fx_offset; | |
966 | ||
e7ff5c73 AM |
967 | if (fixP->fx_addsy != NULL) |
968 | add_symbol_segment = S_GET_SEGMENT (fixP->fx_addsy); | |
969 | ||
970 | if (fixP->fx_subsy != NULL) | |
971 | { | |
972 | segT sub_symbol_segment; | |
973 | resolve_symbol_value (fixP->fx_subsy); | |
974 | sub_symbol_segment = S_GET_SEGMENT (fixP->fx_subsy); | |
975 | if (fixP->fx_addsy != NULL | |
976 | && sub_symbol_segment == add_symbol_segment | |
c969da64 RS |
977 | && !S_FORCE_RELOC (fixP->fx_addsy, 0) |
978 | && !S_FORCE_RELOC (fixP->fx_subsy, 0) | |
e7ff5c73 AM |
979 | && !TC_FORCE_RELOCATION_SUB_SAME (fixP, add_symbol_segment)) |
980 | { | |
981 | add_number += S_GET_VALUE (fixP->fx_addsy); | |
982 | add_number -= S_GET_VALUE (fixP->fx_subsy); | |
983 | fixP->fx_offset = add_number; | |
984 | fixP->fx_addsy = NULL; | |
985 | fixP->fx_subsy = NULL; | |
986 | #ifdef TC_M68K | |
987 | /* See the comment below about 68k weirdness. */ | |
988 | fixP->fx_pcrel = 0; | |
989 | #endif | |
990 | } | |
991 | else if (sub_symbol_segment == absolute_section | |
c969da64 | 992 | && !S_FORCE_RELOC (fixP->fx_subsy, 0) |
9a97a5d7 | 993 | && !TC_FORCE_RELOCATION_SUB_ABS (fixP, add_symbol_segment)) |
e7ff5c73 AM |
994 | { |
995 | add_number -= S_GET_VALUE (fixP->fx_subsy); | |
996 | fixP->fx_offset = add_number; | |
997 | fixP->fx_subsy = NULL; | |
998 | } | |
999 | else if (sub_symbol_segment == this_segment | |
c969da64 | 1000 | && !S_FORCE_RELOC (fixP->fx_subsy, 0) |
5db484ff | 1001 | && !TC_FORCE_RELOCATION_SUB_LOCAL (fixP, add_symbol_segment)) |
e7ff5c73 AM |
1002 | { |
1003 | add_number -= S_GET_VALUE (fixP->fx_subsy); | |
1004 | fixP->fx_offset = (add_number + fixP->fx_dot_value | |
8e723a10 | 1005 | + fixP->fx_dot_frag->fr_address); |
e7ff5c73 AM |
1006 | |
1007 | /* Make it pc-relative. If the back-end code has not | |
1008 | selected a pc-relative reloc, cancel the adjustment | |
1009 | we do later on all pc-relative relocs. */ | |
1010 | if (0 | |
1011 | #ifdef TC_M68K | |
1012 | /* Do this for m68k even if it's already described | |
1013 | as pc-relative. On the m68k, an operand of | |
1014 | "pc@(foo-.-2)" should address "foo" in a | |
1015 | pc-relative mode. */ | |
1016 | || 1 | |
1017 | #endif | |
1018 | || !fixP->fx_pcrel) | |
1019 | add_number += MD_PCREL_FROM_SECTION (fixP, this_segment); | |
1020 | fixP->fx_subsy = NULL; | |
1021 | fixP->fx_pcrel = 1; | |
1022 | } | |
586ec8c1 | 1023 | else if (!TC_VALIDATE_FIX_SUB (fixP, add_symbol_segment)) |
e7ff5c73 | 1024 | { |
9a97a5d7 AM |
1025 | if (!md_register_arithmetic |
1026 | && (add_symbol_segment == reg_section | |
1027 | || sub_symbol_segment == reg_section)) | |
1028 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
1029 | _("register value used as expression")); | |
1030 | else | |
1031 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
1032 | _("can't resolve `%s' {%s section} - `%s' {%s section}"), | |
1033 | fixP->fx_addsy ? S_GET_NAME (fixP->fx_addsy) : "0", | |
1034 | segment_name (add_symbol_segment), | |
1035 | S_GET_NAME (fixP->fx_subsy), | |
1036 | segment_name (sub_symbol_segment)); | |
e7ff5c73 | 1037 | } |
586ec8c1 NC |
1038 | else if (sub_symbol_segment != undefined_section |
1039 | && ! bfd_is_com_section (sub_symbol_segment) | |
1040 | && MD_APPLY_SYM_VALUE (fixP)) | |
1041 | add_number -= S_GET_VALUE (fixP->fx_subsy); | |
e7ff5c73 AM |
1042 | } |
1043 | ||
1044 | if (fixP->fx_addsy) | |
1045 | { | |
1fc5d88e | 1046 | if (add_symbol_segment == this_segment |
c969da64 | 1047 | && !S_FORCE_RELOC (fixP->fx_addsy, 0) |
e7ff5c73 AM |
1048 | && !TC_FORCE_RELOCATION_LOCAL (fixP)) |
1049 | { | |
1050 | /* This fixup was made when the symbol's segment was | |
1051 | SEG_UNKNOWN, but it is now in the local segment. | |
1052 | So we know how to do the address without relocation. */ | |
1053 | add_number += S_GET_VALUE (fixP->fx_addsy); | |
1054 | fixP->fx_offset = add_number; | |
1055 | if (fixP->fx_pcrel) | |
1056 | add_number -= MD_PCREL_FROM_SECTION (fixP, this_segment); | |
1057 | fixP->fx_addsy = NULL; | |
1058 | fixP->fx_pcrel = 0; | |
1059 | } | |
1060 | else if (add_symbol_segment == absolute_section | |
c969da64 | 1061 | && !S_FORCE_RELOC (fixP->fx_addsy, 0) |
e7ff5c73 AM |
1062 | && !TC_FORCE_RELOCATION_ABS (fixP)) |
1063 | { | |
1064 | add_number += S_GET_VALUE (fixP->fx_addsy); | |
1065 | fixP->fx_offset = add_number; | |
1066 | fixP->fx_addsy = NULL; | |
1067 | } | |
1068 | else if (add_symbol_segment != undefined_section | |
1069 | && ! bfd_is_com_section (add_symbol_segment) | |
1070 | && MD_APPLY_SYM_VALUE (fixP)) | |
1071 | add_number += S_GET_VALUE (fixP->fx_addsy); | |
1072 | } | |
1073 | ||
1074 | if (fixP->fx_pcrel) | |
1075 | { | |
1076 | add_number -= MD_PCREL_FROM_SECTION (fixP, this_segment); | |
1077 | if (!fixP->fx_done && fixP->fx_addsy == NULL) | |
1078 | { | |
1079 | /* There was no symbol required by this relocation. | |
1080 | However, BFD doesn't really handle relocations | |
1081 | without symbols well. So fake up a local symbol in | |
1082 | the absolute section. */ | |
1083 | fixP->fx_addsy = abs_section_sym; | |
1084 | } | |
1085 | } | |
1086 | ||
1087 | if (!fixP->fx_done) | |
1088 | md_apply_fix (fixP, &add_number, this_segment); | |
1089 | ||
1090 | if (!fixP->fx_done) | |
1091 | { | |
e7ff5c73 AM |
1092 | if (fixP->fx_addsy == NULL) |
1093 | fixP->fx_addsy = abs_section_sym; | |
1094 | symbol_mark_used_in_reloc (fixP->fx_addsy); | |
1095 | if (fixP->fx_subsy != NULL) | |
1096 | symbol_mark_used_in_reloc (fixP->fx_subsy); | |
1097 | } | |
1098 | ||
5bc11336 | 1099 | if (!fixP->fx_no_overflow && fixP->fx_size != 0) |
e7ff5c73 AM |
1100 | { |
1101 | if (fixP->fx_size < sizeof (valueT)) | |
1102 | { | |
1103 | valueT mask; | |
1104 | ||
1105 | mask = 0; | |
1106 | mask--; /* Set all bits to one. */ | |
1107 | mask <<= fixP->fx_size * 8 - (fixP->fx_signed ? 1 : 0); | |
1108 | if ((add_number & mask) != 0 && (add_number & mask) != mask) | |
1109 | { | |
1110 | char buf[50], buf2[50]; | |
1111 | sprint_value (buf, fragP->fr_address + fixP->fx_where); | |
1112 | if (add_number > 1000) | |
1113 | sprint_value (buf2, add_number); | |
1114 | else | |
1115 | sprintf (buf2, "%ld", (long) add_number); | |
1116 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
992a06ee AM |
1117 | ngettext ("value of %s too large for field " |
1118 | "of %d byte at %s", | |
1119 | "value of %s too large for field " | |
1120 | "of %d bytes at %s", | |
1121 | fixP->fx_size), | |
e7ff5c73 AM |
1122 | buf2, fixP->fx_size, buf); |
1123 | } /* Generic error checking. */ | |
1124 | } | |
1125 | #ifdef WARN_SIGNED_OVERFLOW_WORD | |
1126 | /* Warn if a .word value is too large when treated as a signed | |
1127 | number. We already know it is not too negative. This is to | |
1128 | catch over-large switches generated by gcc on the 68k. */ | |
1129 | if (!flag_signed_overflow_ok | |
1130 | && fixP->fx_size == 2 | |
1131 | && add_number > 0x7fff) | |
1132 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
1133 | _("signed .word overflow; switch may be too large; %ld at 0x%lx"), | |
1134 | (long) add_number, | |
1135 | (long) (fragP->fr_address + fixP->fx_where)); | |
1136 | #endif | |
5bc11336 | 1137 | } |
e7ff5c73 AM |
1138 | |
1139 | #ifdef TC_VALIDATE_FIX | |
1140 | skip: ATTRIBUTE_UNUSED_LABEL | |
1141 | ; | |
1142 | #endif | |
1143 | #ifdef DEBUG5 | |
1144 | fprintf (stderr, "result:\n"); | |
1145 | print_fixup (fixP); | |
1146 | #endif | |
1147 | } /* For each fixS in this segment. */ | |
e7ff5c73 AM |
1148 | } |
1149 | ||
a161fe53 | 1150 | static void |
d7342424 KH |
1151 | fix_segment (bfd *abfd ATTRIBUTE_UNUSED, |
1152 | asection *sec, | |
e7ff5c73 | 1153 | void *xxx ATTRIBUTE_UNUSED) |
a161fe53 AM |
1154 | { |
1155 | segment_info_type *seginfo = seg_info (sec); | |
1156 | ||
1157 | fixup_segment (seginfo->fix_root, sec); | |
1158 | } | |
1159 | ||
e5435dec AM |
1160 | static void |
1161 | install_reloc (asection *sec, arelent *reloc, fragS *fragp, | |
3b4dbbbf | 1162 | const char *file, unsigned int line) |
e5435dec AM |
1163 | { |
1164 | char *err; | |
1165 | bfd_reloc_status_type s; | |
76d12939 AM |
1166 | asymbol *sym; |
1167 | ||
1168 | if (reloc->sym_ptr_ptr != NULL | |
1169 | && (sym = *reloc->sym_ptr_ptr) != NULL | |
1170 | && (sym->flags & BSF_KEEP) == 0 | |
1171 | && ((sym->flags & BSF_SECTION_SYM) == 0 | |
55f8b826 AM |
1172 | || (EMIT_SECTION_SYMBOLS |
1173 | && !bfd_is_abs_section (sym->section)))) | |
76d12939 | 1174 | as_bad_where (file, line, _("redefined symbol cannot be used on reloc")); |
e5435dec AM |
1175 | |
1176 | s = bfd_install_relocation (stdoutput, reloc, | |
1177 | fragp->fr_literal, fragp->fr_address, | |
1178 | sec, &err); | |
1179 | switch (s) | |
1180 | { | |
1181 | case bfd_reloc_ok: | |
1182 | break; | |
1183 | case bfd_reloc_overflow: | |
1184 | as_bad_where (file, line, _("relocation overflow")); | |
1185 | break; | |
1186 | case bfd_reloc_outofrange: | |
1187 | as_bad_where (file, line, _("relocation out of range")); | |
1188 | break; | |
1189 | default: | |
1190 | as_fatal (_("%s:%u: bad return from bfd_install_relocation: %x"), | |
1191 | file, line, s); | |
1192 | } | |
1193 | } | |
1194 | ||
7230378d AM |
1195 | static fragS * |
1196 | get_frag_for_reloc (fragS *last_frag, | |
1197 | const segment_info_type *seginfo, | |
1198 | const struct reloc_list *r) | |
1199 | { | |
1200 | fragS *f; | |
34bca508 | 1201 | |
7230378d AM |
1202 | for (f = last_frag; f != NULL; f = f->fr_next) |
1203 | if (f->fr_address <= r->u.b.r.address | |
1204 | && r->u.b.r.address < f->fr_address + f->fr_fix) | |
1205 | return f; | |
1206 | ||
1207 | for (f = seginfo->frchainP->frch_root; f != NULL; f = f->fr_next) | |
1208 | if (f->fr_address <= r->u.b.r.address | |
1209 | && r->u.b.r.address < f->fr_address + f->fr_fix) | |
1210 | return f; | |
1211 | ||
740bdc67 AM |
1212 | for (f = seginfo->frchainP->frch_root; f != NULL; f = f->fr_next) |
1213 | if (f->fr_address <= r->u.b.r.address | |
1214 | && r->u.b.r.address <= f->fr_address + f->fr_fix) | |
1215 | return f; | |
1216 | ||
7230378d AM |
1217 | as_bad_where (r->file, r->line, |
1218 | _("reloc not within (fixed part of) section")); | |
1219 | return NULL; | |
1220 | } | |
1221 | ||
252b5132 | 1222 | static void |
fd361982 AM |
1223 | write_relocs (bfd *abfd ATTRIBUTE_UNUSED, asection *sec, |
1224 | void *xxx ATTRIBUTE_UNUSED) | |
252b5132 RH |
1225 | { |
1226 | segment_info_type *seginfo = seg_info (sec); | |
252b5132 | 1227 | unsigned int n; |
05e9452c | 1228 | struct reloc_list *my_reloc_list, **rp, *r; |
252b5132 RH |
1229 | arelent **relocs; |
1230 | fixS *fixp; | |
7230378d | 1231 | fragS *last_frag; |
252b5132 RH |
1232 | |
1233 | /* If seginfo is NULL, we did not create this section; don't do | |
1234 | anything with it. */ | |
1235 | if (seginfo == NULL) | |
1236 | return; | |
1237 | ||
252b5132 RH |
1238 | n = 0; |
1239 | for (fixp = seginfo->fix_root; fixp; fixp = fixp->fx_next) | |
e5435dec AM |
1240 | if (!fixp->fx_done) |
1241 | n++; | |
1242 | ||
1243 | #ifdef RELOC_EXPANSION_POSSIBLE | |
1244 | n *= MAX_RELOC_EXPANSION; | |
1245 | #endif | |
252b5132 | 1246 | |
05e9452c AM |
1247 | /* Extract relocs for this section from reloc_list. */ |
1248 | rp = &reloc_list; | |
269b4ded | 1249 | |
05e9452c AM |
1250 | my_reloc_list = NULL; |
1251 | while ((r = *rp) != NULL) | |
1252 | { | |
1253 | if (r->u.b.sec == sec) | |
1254 | { | |
1255 | *rp = r->next; | |
1256 | r->next = my_reloc_list; | |
1257 | my_reloc_list = r; | |
1258 | n++; | |
1259 | } | |
1260 | else | |
1261 | rp = &r->next; | |
1262 | } | |
1263 | ||
add39d23 | 1264 | relocs = XCNEWVEC (arelent *, n); |
252b5132 | 1265 | |
7230378d AM |
1266 | n = 0; |
1267 | r = my_reloc_list; | |
1268 | last_frag = NULL; | |
252b5132 RH |
1269 | for (fixp = seginfo->fix_root; fixp != (fixS *) NULL; fixp = fixp->fx_next) |
1270 | { | |
d31f0f6d | 1271 | int fx_size, slack; |
871a6bd2 | 1272 | valueT loc; |
7230378d AM |
1273 | arelent **reloc; |
1274 | #ifndef RELOC_EXPANSION_POSSIBLE | |
1275 | arelent *rel; | |
1276 | ||
1277 | reloc = &rel; | |
1278 | #endif | |
252b5132 RH |
1279 | |
1280 | if (fixp->fx_done) | |
e5435dec | 1281 | continue; |
252b5132 | 1282 | |
d31f0f6d AM |
1283 | fx_size = fixp->fx_size; |
1284 | slack = TC_FX_SIZE_SLACK (fixp); | |
1285 | if (slack > 0) | |
1286 | fx_size = fx_size > slack ? fx_size - slack : 0; | |
1287 | loc = fixp->fx_where + fx_size; | |
e5435dec | 1288 | if (slack >= 0 && loc > fixp->fx_frag->fr_fix) |
d31f0f6d AM |
1289 | as_bad_where (fixp->fx_file, fixp->fx_line, |
1290 | _("internal error: fixup not contained within frag")); | |
252b5132 | 1291 | |
e5435dec | 1292 | #ifndef RELOC_EXPANSION_POSSIBLE |
7230378d | 1293 | *reloc = tc_gen_reloc (sec, fixp); |
e5435dec | 1294 | #else |
7230378d AM |
1295 | reloc = tc_gen_reloc (sec, fixp); |
1296 | #endif | |
252b5132 | 1297 | |
7230378d AM |
1298 | while (*reloc) |
1299 | { | |
1300 | while (r != NULL && r->u.b.r.address < (*reloc)->address) | |
1301 | { | |
1302 | fragS *f = get_frag_for_reloc (last_frag, seginfo, r); | |
1303 | if (f != NULL) | |
1304 | { | |
1305 | last_frag = f; | |
1306 | relocs[n++] = &r->u.b.r; | |
1307 | install_reloc (sec, &r->u.b.r, f, r->file, r->line); | |
1308 | } | |
1309 | r = r->next; | |
1310 | } | |
1311 | relocs[n++] = *reloc; | |
1312 | install_reloc (sec, *reloc, fixp->fx_frag, | |
1313 | fixp->fx_file, fixp->fx_line); | |
1314 | #ifndef RELOC_EXPANSION_POSSIBLE | |
1315 | break; | |
1316 | #else | |
1317 | reloc++; | |
e5435dec | 1318 | #endif |
7230378d AM |
1319 | } |
1320 | } | |
d31f0f6d | 1321 | |
7230378d AM |
1322 | while (r != NULL) |
1323 | { | |
1324 | fragS *f = get_frag_for_reloc (last_frag, seginfo, r); | |
1325 | if (f != NULL) | |
1326 | { | |
1327 | last_frag = f; | |
1328 | relocs[n++] = &r->u.b.r; | |
1329 | install_reloc (sec, &r->u.b.r, f, r->file, r->line); | |
1330 | } | |
1331 | r = r->next; | |
252b5132 | 1332 | } |
252b5132 RH |
1333 | |
1334 | #ifdef DEBUG4 | |
1335 | { | |
1596988d | 1336 | unsigned int k, j, nsyms; |
252b5132 RH |
1337 | asymbol **sympp; |
1338 | sympp = bfd_get_outsymbols (stdoutput); | |
1339 | nsyms = bfd_get_symcount (stdoutput); | |
1596988d TG |
1340 | for (k = 0; k < n; k++) |
1341 | if (((*relocs[k]->sym_ptr_ptr)->flags & BSF_SECTION_SYM) == 0) | |
252b5132 RH |
1342 | { |
1343 | for (j = 0; j < nsyms; j++) | |
1596988d | 1344 | if (sympp[j] == *relocs[k]->sym_ptr_ptr) |
252b5132 RH |
1345 | break; |
1346 | if (j == nsyms) | |
1347 | abort (); | |
1348 | } | |
1349 | } | |
1350 | #endif | |
1351 | ||
1352 | if (n) | |
e5435dec | 1353 | { |
fd361982 | 1354 | flagword flags = bfd_section_flags (sec); |
e5435dec | 1355 | flags |= SEC_RELOC; |
fd361982 | 1356 | bfd_set_section_flags (sec, flags); |
e5435dec AM |
1357 | bfd_set_reloc (stdoutput, sec, relocs, n); |
1358 | } | |
252b5132 | 1359 | |
945a1a6b ILT |
1360 | #ifdef SET_SECTION_RELOCS |
1361 | SET_SECTION_RELOCS (sec, relocs, n); | |
1362 | #endif | |
1363 | ||
252b5132 RH |
1364 | #ifdef DEBUG3 |
1365 | { | |
1596988d TG |
1366 | unsigned int k; |
1367 | ||
252b5132 | 1368 | fprintf (stderr, "relocs for sec %s\n", sec->name); |
1596988d | 1369 | for (k = 0; k < n; k++) |
252b5132 | 1370 | { |
1596988d TG |
1371 | arelent *rel = relocs[k]; |
1372 | asymbol *s = *rel->sym_ptr_ptr; | |
988392e2 | 1373 | fprintf (stderr, " reloc %2d @%p off %4lx : sym %-10s addend %lx\n", |
1596988d TG |
1374 | k, rel, (unsigned long)rel->address, s->name, |
1375 | (unsigned long)rel->addend); | |
252b5132 RH |
1376 | } |
1377 | } | |
1378 | #endif | |
1379 | } | |
1380 | ||
0acf065b CC |
1381 | static int |
1382 | compress_frag (struct z_stream_s *strm, const char *contents, int in_size, | |
1383 | fragS **last_newf, struct obstack *ob) | |
1384 | { | |
1385 | int out_size; | |
1386 | int total_out_size = 0; | |
1387 | fragS *f = *last_newf; | |
1388 | char *next_out; | |
1389 | int avail_out; | |
1390 | ||
1391 | /* Call the compression routine repeatedly until it has finished | |
1392 | processing the frag. */ | |
1393 | while (in_size > 0) | |
1394 | { | |
1395 | /* Reserve all the space available in the current chunk. | |
1396 | If none is available, start a new frag. */ | |
1397 | avail_out = obstack_room (ob); | |
1398 | if (avail_out <= 0) | |
1399 | { | |
1400 | obstack_finish (ob); | |
1401 | f = frag_alloc (ob); | |
1402 | f->fr_type = rs_fill; | |
1403 | (*last_newf)->fr_next = f; | |
1404 | *last_newf = f; | |
1405 | avail_out = obstack_room (ob); | |
1406 | } | |
1407 | if (avail_out <= 0) | |
1408 | as_fatal (_("can't extend frag")); | |
1409 | next_out = obstack_next_free (ob); | |
1410 | obstack_blank_fast (ob, avail_out); | |
1411 | out_size = compress_data (strm, &contents, &in_size, | |
1412 | &next_out, &avail_out); | |
1413 | if (out_size < 0) | |
1414 | return -1; | |
1415 | ||
1416 | f->fr_fix += out_size; | |
1417 | total_out_size += out_size; | |
1418 | ||
1419 | /* Return unused space. */ | |
1420 | if (avail_out > 0) | |
1421 | obstack_blank_fast (ob, -avail_out); | |
1422 | } | |
1423 | ||
1424 | return total_out_size; | |
1425 | } | |
1426 | ||
1427 | static void | |
1428 | compress_debug (bfd *abfd, asection *sec, void *xxx ATTRIBUTE_UNUSED) | |
1429 | { | |
1430 | segment_info_type *seginfo = seg_info (sec); | |
1431 | fragS *f; | |
1432 | fragS *first_newf; | |
1433 | fragS *last_newf; | |
1434 | struct obstack *ob = &seginfo->frchainP->frch_obstack; | |
1435 | bfd_size_type uncompressed_size = (bfd_size_type) sec->size; | |
1436 | bfd_size_type compressed_size; | |
1437 | const char *section_name; | |
1438 | char *compressed_name; | |
1439 | char *header; | |
1440 | struct z_stream_s *strm; | |
1441 | int x; | |
fd361982 | 1442 | flagword flags = bfd_section_flags (sec); |
151411f8 | 1443 | unsigned int header_size, compression_header_size; |
0acf065b CC |
1444 | |
1445 | if (seginfo == NULL | |
6ac88ef3 | 1446 | || sec->size < 32 |
4a114e3e | 1447 | || (flags & (SEC_ALLOC | SEC_HAS_CONTENTS)) == SEC_ALLOC) |
0acf065b CC |
1448 | return; |
1449 | ||
fd361982 | 1450 | section_name = bfd_section_name (sec); |
0acf065b CC |
1451 | if (strncmp (section_name, ".debug_", 7) != 0) |
1452 | return; | |
1453 | ||
1454 | strm = compress_init (); | |
1455 | if (strm == NULL) | |
1456 | return; | |
1457 | ||
151411f8 | 1458 | if (flag_compress_debug == COMPRESS_DEBUG_GABI_ZLIB) |
dab394de | 1459 | { |
dab394de L |
1460 | compression_header_size |
1461 | = bfd_get_compression_header_size (stdoutput, NULL); | |
1462 | header_size = compression_header_size; | |
1463 | } | |
151411f8 | 1464 | else |
dab394de | 1465 | { |
dab394de L |
1466 | compression_header_size = 0; |
1467 | header_size = 12; | |
1468 | } | |
151411f8 | 1469 | |
dab394de | 1470 | /* Create a new frag to contain the compression header. */ |
0acf065b | 1471 | first_newf = frag_alloc (ob); |
151411f8 | 1472 | if (obstack_room (ob) < header_size) |
0acf065b | 1473 | first_newf = frag_alloc (ob); |
151411f8 | 1474 | if (obstack_room (ob) < header_size) |
992a06ee AM |
1475 | as_fatal (ngettext ("can't extend frag %lu char", |
1476 | "can't extend frag %lu chars", | |
1477 | (unsigned long) header_size), | |
1478 | (unsigned long) header_size); | |
0acf065b | 1479 | last_newf = first_newf; |
151411f8 | 1480 | obstack_blank_fast (ob, header_size); |
0acf065b | 1481 | last_newf->fr_type = rs_fill; |
151411f8 | 1482 | last_newf->fr_fix = header_size; |
0acf065b | 1483 | header = last_newf->fr_literal; |
151411f8 | 1484 | compressed_size = header_size; |
0acf065b CC |
1485 | |
1486 | /* Stream the frags through the compression engine, adding new frags | |
2b0f3761 | 1487 | as necessary to accommodate the compressed output. */ |
0acf065b CC |
1488 | for (f = seginfo->frchainP->frch_root; |
1489 | f; | |
1490 | f = f->fr_next) | |
1491 | { | |
1492 | offsetT fill_size; | |
1493 | char *fill_literal; | |
1494 | offsetT count; | |
1495 | int out_size; | |
1496 | ||
1497 | gas_assert (f->fr_type == rs_fill); | |
1498 | if (f->fr_fix) | |
1499 | { | |
1500 | out_size = compress_frag (strm, f->fr_literal, f->fr_fix, | |
1501 | &last_newf, ob); | |
1502 | if (out_size < 0) | |
1503 | return; | |
1504 | compressed_size += out_size; | |
1505 | } | |
1506 | fill_literal = f->fr_literal + f->fr_fix; | |
1507 | fill_size = f->fr_var; | |
1508 | count = f->fr_offset; | |
1509 | gas_assert (count >= 0); | |
1510 | if (fill_size && count) | |
1511 | { | |
1512 | while (count--) | |
1513 | { | |
1514 | out_size = compress_frag (strm, fill_literal, (int) fill_size, | |
1515 | &last_newf, ob); | |
1516 | if (out_size < 0) | |
1517 | return; | |
1518 | compressed_size += out_size; | |
1519 | } | |
1520 | } | |
1521 | } | |
1522 | ||
1523 | /* Flush the compression state. */ | |
1524 | for (;;) | |
1525 | { | |
1526 | int avail_out; | |
1527 | char *next_out; | |
1528 | int out_size; | |
1529 | ||
1530 | /* Reserve all the space available in the current chunk. | |
1531 | If none is available, start a new frag. */ | |
1532 | avail_out = obstack_room (ob); | |
1533 | if (avail_out <= 0) | |
1534 | { | |
1535 | fragS *newf; | |
1536 | ||
1537 | obstack_finish (ob); | |
1538 | newf = frag_alloc (ob); | |
1539 | newf->fr_type = rs_fill; | |
1540 | last_newf->fr_next = newf; | |
1541 | last_newf = newf; | |
1542 | avail_out = obstack_room (ob); | |
1543 | } | |
1544 | if (avail_out <= 0) | |
1545 | as_fatal (_("can't extend frag")); | |
1546 | next_out = obstack_next_free (ob); | |
1547 | obstack_blank_fast (ob, avail_out); | |
1548 | x = compress_finish (strm, &next_out, &avail_out, &out_size); | |
1549 | if (x < 0) | |
1550 | return; | |
1551 | ||
1552 | last_newf->fr_fix += out_size; | |
1553 | compressed_size += out_size; | |
1554 | ||
1555 | /* Return unused space. */ | |
1556 | if (avail_out > 0) | |
1557 | obstack_blank_fast (ob, -avail_out); | |
1558 | ||
1559 | if (x == 0) | |
1560 | break; | |
1561 | } | |
1562 | ||
b422eb49 L |
1563 | /* PR binutils/18087: If compression didn't make the section smaller, |
1564 | just keep it uncompressed. */ | |
317974f6 | 1565 | if (compressed_size >= uncompressed_size) |
273a4985 | 1566 | return; |
d94077e2 | 1567 | |
0acf065b CC |
1568 | /* Replace the uncompressed frag list with the compressed frag list. */ |
1569 | seginfo->frchainP->frch_root = first_newf; | |
1570 | seginfo->frchainP->frch_last = last_newf; | |
1571 | ||
1572 | /* Update the section size and its name. */ | |
151411f8 | 1573 | bfd_update_compression_header (abfd, (bfd_byte *) header, sec); |
fd361982 | 1574 | x = bfd_set_section_size (sec, compressed_size); |
0acf065b | 1575 | gas_assert (x); |
151411f8 L |
1576 | if (!compression_header_size) |
1577 | { | |
29a2809e | 1578 | compressed_name = concat (".z", section_name + 1, (char *) NULL); |
fd361982 | 1579 | bfd_rename_section (sec, compressed_name); |
151411f8 | 1580 | } |
0acf065b CC |
1581 | } |
1582 | ||
62a02d25 L |
1583 | #ifndef md_generate_nops |
1584 | /* Genenerate COUNT bytes of no-op instructions to WHERE. A target | |
1585 | backend must override this with proper no-op instructions. */ | |
1586 | ||
1587 | static void | |
1588 | md_generate_nops (fragS *f ATTRIBUTE_UNUSED, | |
1589 | char *where ATTRIBUTE_UNUSED, | |
1590 | offsetT count ATTRIBUTE_UNUSED, | |
1591 | int control ATTRIBUTE_UNUSED) | |
1592 | { | |
8f065d3b | 1593 | as_bad (_("unimplemented .nops directive")); |
62a02d25 L |
1594 | } |
1595 | #endif | |
1596 | ||
252b5132 | 1597 | static void |
d7342424 KH |
1598 | write_contents (bfd *abfd ATTRIBUTE_UNUSED, |
1599 | asection *sec, | |
e7ff5c73 | 1600 | void *xxx ATTRIBUTE_UNUSED) |
252b5132 RH |
1601 | { |
1602 | segment_info_type *seginfo = seg_info (sec); | |
685736be | 1603 | addressT offset = 0; |
252b5132 RH |
1604 | fragS *f; |
1605 | ||
1606 | /* Write out the frags. */ | |
1607 | if (seginfo == NULL | |
fd361982 | 1608 | || !(bfd_section_flags (sec) & SEC_HAS_CONTENTS)) |
252b5132 RH |
1609 | return; |
1610 | ||
1611 | for (f = seginfo->frchainP->frch_root; | |
1612 | f; | |
1613 | f = f->fr_next) | |
1614 | { | |
1615 | int x; | |
685736be | 1616 | addressT fill_size; |
252b5132 | 1617 | char *fill_literal; |
685736be | 1618 | offsetT count; |
252b5132 | 1619 | |
62a02d25 | 1620 | gas_assert (f->fr_type == rs_fill || f->fr_type == rs_fill_nop); |
252b5132 RH |
1621 | if (f->fr_fix) |
1622 | { | |
1623 | x = bfd_set_section_contents (stdoutput, sec, | |
1624 | f->fr_literal, (file_ptr) offset, | |
1625 | (bfd_size_type) f->fr_fix); | |
b34976b6 | 1626 | if (!x) |
992a06ee AM |
1627 | as_fatal (ngettext ("can't write %ld byte " |
1628 | "to section %s of %s: '%s'", | |
1629 | "can't write %ld bytes " | |
1630 | "to section %s of %s: '%s'", | |
1631 | (long) f->fr_fix), | |
1632 | (long) f->fr_fix, | |
69f57659 | 1633 | bfd_section_name (sec), bfd_get_filename (stdoutput), |
885afe7b | 1634 | bfd_errmsg (bfd_get_error ())); |
252b5132 RH |
1635 | offset += f->fr_fix; |
1636 | } | |
62a02d25 | 1637 | |
252b5132 RH |
1638 | fill_size = f->fr_var; |
1639 | count = f->fr_offset; | |
62a02d25 L |
1640 | fill_literal = f->fr_literal + f->fr_fix; |
1641 | ||
1642 | if (f->fr_type == rs_fill_nop) | |
1643 | { | |
1644 | gas_assert (count >= 0 && fill_size == 1); | |
1645 | if (count > 0) | |
1646 | { | |
1647 | char *buf = xmalloc (count); | |
1648 | md_generate_nops (f, buf, count, *fill_literal); | |
1649 | x = bfd_set_section_contents | |
1650 | (stdoutput, sec, buf, (file_ptr) offset, | |
1651 | (bfd_size_type) count); | |
1652 | if (!x) | |
1653 | as_fatal (ngettext ("can't fill %ld byte " | |
1654 | "in section %s of %s: '%s'", | |
1655 | "can't fill %ld bytes " | |
1656 | "in section %s of %s: '%s'", | |
69f57659 AM |
1657 | (long) count), |
1658 | (long) count, | |
1659 | bfd_section_name (sec), | |
1660 | bfd_get_filename (stdoutput), | |
1661 | bfd_errmsg (bfd_get_error ())); | |
62a02d25 L |
1662 | offset += count; |
1663 | free (buf); | |
1664 | } | |
1665 | continue; | |
1666 | } | |
1667 | ||
9c2799c2 | 1668 | gas_assert (count >= 0); |
252b5132 RH |
1669 | if (fill_size && count) |
1670 | { | |
1671 | char buf[256]; | |
efaf0ba4 | 1672 | if (fill_size > sizeof (buf)) |
252b5132 | 1673 | { |
efaf0ba4 | 1674 | /* Do it the old way. Can this ever happen? */ |
252b5132 RH |
1675 | while (count--) |
1676 | { | |
1677 | x = bfd_set_section_contents (stdoutput, sec, | |
1678 | fill_literal, | |
1679 | (file_ptr) offset, | |
1680 | (bfd_size_type) fill_size); | |
b34976b6 | 1681 | if (!x) |
992a06ee AM |
1682 | as_fatal (ngettext ("can't fill %ld byte " |
1683 | "in section %s of %s: '%s'", | |
1684 | "can't fill %ld bytes " | |
1685 | "in section %s of %s: '%s'", | |
1686 | (long) fill_size), | |
1687 | (long) fill_size, | |
69f57659 AM |
1688 | bfd_section_name (sec), |
1689 | bfd_get_filename (stdoutput), | |
885afe7b | 1690 | bfd_errmsg (bfd_get_error ())); |
252b5132 RH |
1691 | offset += fill_size; |
1692 | } | |
1693 | } | |
1694 | else | |
1695 | { | |
1696 | /* Build a buffer full of fill objects and output it as | |
1697 | often as necessary. This saves on the overhead of | |
1698 | potentially lots of bfd_set_section_contents calls. */ | |
1699 | int n_per_buf, i; | |
1700 | if (fill_size == 1) | |
1701 | { | |
1702 | n_per_buf = sizeof (buf); | |
1703 | memset (buf, *fill_literal, n_per_buf); | |
1704 | } | |
1705 | else | |
1706 | { | |
1707 | char *bufp; | |
efaf0ba4 | 1708 | n_per_buf = sizeof (buf) / fill_size; |
252b5132 | 1709 | for (i = n_per_buf, bufp = buf; i; i--, bufp += fill_size) |
efaf0ba4 | 1710 | memcpy (bufp, fill_literal, fill_size); |
252b5132 RH |
1711 | } |
1712 | for (; count > 0; count -= n_per_buf) | |
1713 | { | |
1714 | n_per_buf = n_per_buf > count ? count : n_per_buf; | |
efaf0ba4 NC |
1715 | x = bfd_set_section_contents |
1716 | (stdoutput, sec, buf, (file_ptr) offset, | |
1717 | (bfd_size_type) n_per_buf * fill_size); | |
b34976b6 | 1718 | if (!x) |
992a06ee AM |
1719 | as_fatal (ngettext ("can't fill %ld byte " |
1720 | "in section %s of %s: '%s'", | |
1721 | "can't fill %ld bytes " | |
1722 | "in section %s of %s: '%s'", | |
1723 | (long) (n_per_buf * fill_size)), | |
1724 | (long) (n_per_buf * fill_size), | |
69f57659 AM |
1725 | bfd_section_name (sec), |
1726 | bfd_get_filename (stdoutput), | |
a22429b9 | 1727 | bfd_errmsg (bfd_get_error ())); |
252b5132 RH |
1728 | offset += n_per_buf * fill_size; |
1729 | } | |
1730 | } | |
1731 | } | |
1732 | } | |
1733 | } | |
252b5132 | 1734 | |
252b5132 | 1735 | static void |
d7342424 | 1736 | merge_data_into_text (void) |
252b5132 | 1737 | { |
252b5132 RH |
1738 | seg_info (text_section)->frchainP->frch_last->fr_next = |
1739 | seg_info (data_section)->frchainP->frch_root; | |
1740 | seg_info (text_section)->frchainP->frch_last = | |
1741 | seg_info (data_section)->frchainP->frch_last; | |
1742 | seg_info (data_section)->frchainP = 0; | |
252b5132 | 1743 | } |
252b5132 | 1744 | |
252b5132 | 1745 | static void |
d7342424 | 1746 | set_symtab (void) |
252b5132 RH |
1747 | { |
1748 | int nsyms; | |
1749 | asymbol **asympp; | |
1750 | symbolS *symp; | |
b34976b6 | 1751 | bfd_boolean result; |
252b5132 RH |
1752 | |
1753 | /* Count symbols. We can't rely on a count made by the loop in | |
1754 | write_object_file, because *_frob_file may add a new symbol or | |
d1bcae83 | 1755 | two. Generate unused section symbols only if needed. */ |
252b5132 RH |
1756 | nsyms = 0; |
1757 | for (symp = symbol_rootP; symp; symp = symbol_next (symp)) | |
d1bcae83 L |
1758 | if (bfd_keep_unused_section_symbols (stdoutput) |
1759 | || !symbol_section_p (symp) | |
1760 | || symbol_used_in_reloc_p (symp)) | |
1761 | nsyms++; | |
252b5132 RH |
1762 | |
1763 | if (nsyms) | |
1764 | { | |
1765 | int i; | |
0e1a166b | 1766 | bfd_size_type amt = (bfd_size_type) nsyms * sizeof (asymbol *); |
252b5132 | 1767 | |
1e9cc1c2 | 1768 | asympp = (asymbol **) bfd_alloc (stdoutput, amt); |
252b5132 | 1769 | symp = symbol_rootP; |
d1bcae83 L |
1770 | for (i = 0; i < nsyms; symp = symbol_next (symp)) |
1771 | if (bfd_keep_unused_section_symbols (stdoutput) | |
1772 | || !symbol_section_p (symp) | |
1773 | || symbol_used_in_reloc_p (symp)) | |
1774 | { | |
1775 | asympp[i] = symbol_get_bfdsym (symp); | |
1776 | if (asympp[i]->flags != BSF_SECTION_SYM | |
1777 | || !(bfd_is_const_section (asympp[i]->section) | |
1778 | && asympp[i]->section->symbol == asympp[i])) | |
1779 | asympp[i]->flags |= BSF_KEEP; | |
1780 | symbol_mark_written (symp); | |
1781 | /* Include this section symbol in the symbol table. */ | |
1782 | if (symbol_section_p (symp)) | |
1783 | asympp[i]->flags |= BSF_SECTION_SYM_USED; | |
1784 | i++; | |
1785 | } | |
252b5132 RH |
1786 | } |
1787 | else | |
1788 | asympp = 0; | |
1789 | result = bfd_set_symtab (stdoutput, asympp, nsyms); | |
9c2799c2 | 1790 | gas_assert (result); |
252b5132 RH |
1791 | symbol_table_frozen = 1; |
1792 | } | |
252b5132 RH |
1793 | |
1794 | /* Finish the subsegments. After every sub-segment, we fake an | |
2edb36e7 | 1795 | ".align ...". This conforms to BSD4.2 brain-damage. We then fake |
252b5132 RH |
1796 | ".fill 0" because that is the kind of frag that requires least |
1797 | thought. ".align" frags like to have a following frag since that | |
1798 | makes calculating their intended length trivial. */ | |
1799 | ||
1800 | #ifndef SUB_SEGMENT_ALIGN | |
18e1d487 | 1801 | #ifdef HANDLE_ALIGN |
436d9e46 | 1802 | /* The last subsegment gets an alignment corresponding to the alignment |
18e1d487 AM |
1803 | of the section. This allows proper nop-filling at the end of |
1804 | code-bearing sections. */ | |
1805 | #define SUB_SEGMENT_ALIGN(SEG, FRCHAIN) \ | |
9028d943 | 1806 | (!(FRCHAIN)->frch_next && subseg_text_p (SEG) \ |
2edb36e7 | 1807 | && !do_not_pad_sections_to_alignment \ |
9028d943 AM |
1808 | ? get_recorded_alignment (SEG) \ |
1809 | : 0) | |
18e1d487 | 1810 | #else |
18e1d487 | 1811 | #define SUB_SEGMENT_ALIGN(SEG, FRCHAIN) 0 |
252b5132 RH |
1812 | #endif |
1813 | #endif | |
1814 | ||
85024cd8 | 1815 | static void |
d98b0e2b | 1816 | subsegs_finish_section (asection *s) |
252b5132 RH |
1817 | { |
1818 | struct frchain *frchainP; | |
d98b0e2b TG |
1819 | segment_info_type *seginfo = seg_info (s); |
1820 | if (!seginfo) | |
1821 | return; | |
252b5132 | 1822 | |
d98b0e2b TG |
1823 | for (frchainP = seginfo->frchainP; |
1824 | frchainP != NULL; | |
1825 | frchainP = frchainP->frch_next) | |
252b5132 | 1826 | { |
93a24ba7 | 1827 | int alignment; |
0a9ef439 | 1828 | |
d98b0e2b | 1829 | subseg_set (s, frchainP->frch_subseg); |
381a1ab3 | 1830 | |
d98b0e2b TG |
1831 | /* This now gets called even if we had errors. In that case, |
1832 | any alignment is meaningless, and, moreover, will look weird | |
1833 | if we are generating a listing. */ | |
93a24ba7 MR |
1834 | if (had_errors ()) |
1835 | do_not_pad_sections_to_alignment = 1; | |
c9049d30 | 1836 | |
93a24ba7 | 1837 | alignment = SUB_SEGMENT_ALIGN (now_seg, frchainP); |
fd361982 | 1838 | if ((bfd_section_flags (now_seg) & SEC_MERGE) |
93a24ba7 MR |
1839 | && now_seg->entsize) |
1840 | { | |
1841 | unsigned int entsize = now_seg->entsize; | |
1842 | int entalign = 0; | |
d98b0e2b | 1843 | |
93a24ba7 MR |
1844 | while ((entsize & 1) == 0) |
1845 | { | |
1846 | ++entalign; | |
1847 | entsize >>= 1; | |
381a1ab3 | 1848 | } |
93a24ba7 MR |
1849 | |
1850 | if (entalign > alignment) | |
1851 | alignment = entalign; | |
d98b0e2b | 1852 | } |
0a9ef439 | 1853 | |
d98b0e2b TG |
1854 | if (subseg_text_p (now_seg)) |
1855 | frag_align_code (alignment, 0); | |
1856 | else | |
1857 | frag_align (alignment, 0, 0); | |
252b5132 | 1858 | |
d98b0e2b TG |
1859 | /* frag_align will have left a new frag. |
1860 | Use this last frag for an empty ".fill". | |
252b5132 | 1861 | |
d98b0e2b TG |
1862 | For this segment ... |
1863 | Create a last frag. Do not leave a "being filled in frag". */ | |
1864 | frag_wane (frag_now); | |
1865 | frag_now->fr_fix = 0; | |
1866 | know (frag_now->fr_next == NULL); | |
252b5132 RH |
1867 | } |
1868 | } | |
1869 | ||
d98b0e2b TG |
1870 | static void |
1871 | subsegs_finish (void) | |
1872 | { | |
1873 | asection *s; | |
1874 | ||
1875 | for (s = stdoutput->sections; s; s = s->next) | |
1876 | subsegs_finish_section (s); | |
1877 | } | |
1878 | ||
1879 | #ifdef OBJ_ELF | |
1880 | static void | |
1881 | create_obj_attrs_section (void) | |
1882 | { | |
1883 | segT s; | |
1884 | char *p; | |
1885 | offsetT size; | |
1886 | const char *name; | |
1887 | ||
1888 | size = bfd_elf_obj_attr_size (stdoutput); | |
0df8ad28 NC |
1889 | if (size == 0) |
1890 | return; | |
1891 | ||
1892 | name = get_elf_backend_data (stdoutput)->obj_attrs_section; | |
1893 | if (!name) | |
1894 | name = ".gnu.attributes"; | |
1895 | s = subseg_new (name, 0); | |
1896 | elf_section_type (s) | |
1897 | = get_elf_backend_data (stdoutput)->obj_attrs_section_type; | |
fd361982 | 1898 | bfd_set_section_flags (s, SEC_READONLY | SEC_DATA); |
0df8ad28 NC |
1899 | frag_now_fix (); |
1900 | p = frag_more (size); | |
1901 | bfd_elf_set_obj_attr_contents (stdoutput, (bfd_byte *)p, size); | |
1902 | ||
1903 | subsegs_finish_section (s); | |
1904 | relax_segment (seg_info (s)->frchainP->frch_root, s, 0); | |
1905 | size_seg (stdoutput, s, NULL); | |
1906 | } | |
1907 | ||
0df8ad28 NC |
1908 | /* Create a relocation against an entry in a GNU Build attribute section. */ |
1909 | ||
1910 | static void | |
1911 | create_note_reloc (segT sec, | |
1912 | symbolS * sym, | |
269b4ded NC |
1913 | bfd_size_type note_offset, |
1914 | bfd_size_type desc2_offset, | |
56c1b507 | 1915 | offsetT desc2_size, |
0df8ad28 NC |
1916 | int reloc_type, |
1917 | bfd_vma addend, | |
1918 | char * note) | |
1919 | { | |
1920 | struct reloc_list * reloc; | |
1921 | ||
1922 | reloc = XNEW (struct reloc_list); | |
1923 | ||
1924 | /* We create a .b type reloc as resolve_reloc_expr_symbols() has already been called. */ | |
269b4ded NC |
1925 | reloc->u.b.sec = sec; |
1926 | reloc->u.b.s = symbol_get_bfdsym (sym); | |
0df8ad28 | 1927 | reloc->u.b.r.sym_ptr_ptr = & reloc->u.b.s; |
269b4ded | 1928 | reloc->u.b.r.address = note_offset + desc2_offset; |
0df8ad28 NC |
1929 | reloc->u.b.r.addend = addend; |
1930 | reloc->u.b.r.howto = bfd_reloc_type_lookup (stdoutput, reloc_type); | |
1931 | ||
1932 | if (reloc->u.b.r.howto == NULL) | |
d98b0e2b | 1933 | { |
0df8ad28 NC |
1934 | as_bad (_("unable to create reloc for build note")); |
1935 | return; | |
1936 | } | |
1937 | ||
1938 | reloc->file = N_("<gnu build note>"); | |
1939 | reloc->line = 0; | |
1940 | ||
1941 | reloc->next = reloc_list; | |
1942 | reloc_list = reloc; | |
1943 | ||
1944 | /* For REL relocs, store the addend in the section. */ | |
1945 | if (! sec->use_rela_p | |
1946 | /* The SH target is a special case that uses RELA relocs | |
1947 | but still stores the addend in the word being relocated. */ | |
1948 | || strstr (bfd_get_target (stdoutput), "-sh") != NULL) | |
1949 | { | |
56c1b507 NC |
1950 | offsetT i; |
1951 | ||
1952 | /* Zero out the addend, since it is now stored in the note. */ | |
1953 | reloc->u.b.r.addend = 0; | |
1954 | ||
0df8ad28 NC |
1955 | if (target_big_endian) |
1956 | { | |
56c1b507 NC |
1957 | for (i = desc2_size; addend != 0 && i > 0; addend >>= 8, i--) |
1958 | note[desc2_offset + i - 1] = (addend & 0xff); | |
0df8ad28 NC |
1959 | } |
1960 | else | |
56c1b507 NC |
1961 | { |
1962 | for (i = 0; addend != 0 && i < desc2_size; addend >>= 8, i++) | |
1963 | note[desc2_offset + i] = (addend & 0xff); | |
1964 | } | |
d98b0e2b TG |
1965 | } |
1966 | } | |
0df8ad28 NC |
1967 | |
1968 | static void | |
1969 | maybe_generate_build_notes (void) | |
1970 | { | |
1971 | segT sec; | |
1972 | char * note; | |
1973 | offsetT note_size; | |
864bb26c | 1974 | offsetT total_size; |
0df8ad28 NC |
1975 | offsetT desc_size; |
1976 | offsetT desc2_offset; | |
1977 | int desc_reloc; | |
1978 | symbolS * sym; | |
8d1015a8 | 1979 | asymbol * bsym; |
0df8ad28 NC |
1980 | |
1981 | if (! flag_generate_build_notes | |
1982 | || bfd_get_section_by_name (stdoutput, | |
1983 | GNU_BUILD_ATTRS_SECTION_NAME) != NULL) | |
1984 | return; | |
1985 | ||
1986 | /* Create a GNU Build Attribute section. */ | |
1987 | sec = subseg_new (GNU_BUILD_ATTRS_SECTION_NAME, FALSE); | |
1988 | elf_section_type (sec) = SHT_NOTE; | |
61826503 CE |
1989 | bfd_set_section_flags (sec, (SEC_READONLY | SEC_HAS_CONTENTS | SEC_DATA |
1990 | | SEC_OCTETS)); | |
fd361982 | 1991 | bfd_set_section_alignment (sec, 2); |
0df8ad28 | 1992 | |
864bb26c NC |
1993 | /* Work out the size of the notes that we will create, |
1994 | and the relocation we should use. */ | |
0df8ad28 NC |
1995 | if (bfd_arch_bits_per_address (stdoutput) <= 32) |
1996 | { | |
1997 | note_size = 28; | |
1998 | desc_size = 8; /* Two 4-byte offsets. */ | |
1999 | desc2_offset = 24; | |
2000 | ||
2001 | /* FIXME: The BFD backend for the CRX target does not support the | |
2002 | BFD_RELOC_32, even though it really should. Likewise for the | |
2003 | CR16 target. So we have special case code here... */ | |
2004 | if (strstr (bfd_get_target (stdoutput), "-crx") != NULL) | |
2005 | desc_reloc = BFD_RELOC_CRX_NUM32; | |
2006 | else if (strstr (bfd_get_target (stdoutput), "-cr16") != NULL) | |
2007 | desc_reloc = BFD_RELOC_CR16_NUM32; | |
2008 | else | |
2009 | desc_reloc = BFD_RELOC_32; | |
2010 | } | |
2011 | else | |
2012 | { | |
2013 | note_size = 36; | |
2014 | desc_size = 16; /* Two 8-byte offsets. */ | |
2015 | desc2_offset = 28; | |
2016 | /* FIXME: The BFD backend for the IA64 target does not support the | |
2017 | BFD_RELOC_64, even though it really should. The HPPA backend | |
2018 | has a similar issue, although it does not support BFD_RELOCs at | |
2019 | all! So we have special case code to handle these targets. */ | |
2020 | if (strstr (bfd_get_target (stdoutput), "-ia64") != NULL) | |
2021 | desc_reloc = target_big_endian ? BFD_RELOC_IA64_DIR32MSB : BFD_RELOC_IA64_DIR32LSB; | |
2022 | else if (strstr (bfd_get_target (stdoutput), "-hppa") != NULL) | |
2023 | desc_reloc = 80; /* R_PARISC_DIR64. */ | |
2024 | else | |
2025 | desc_reloc = BFD_RELOC_64; | |
2026 | } | |
2027 | ||
864bb26c NC |
2028 | /* We have to create a note for *each* code section. |
2029 | Linker garbage collection might discard some. */ | |
2030 | total_size = 0; | |
2031 | note = NULL; | |
0df8ad28 | 2032 | |
8d1015a8 AM |
2033 | for (sym = symbol_rootP; sym != NULL; sym = symbol_next (sym)) |
2034 | if ((bsym = symbol_get_bfdsym (sym)) != NULL | |
2035 | && bsym->flags & BSF_SECTION_SYM | |
2036 | && bsym->section != NULL | |
2e48456f | 2037 | /* Skip linkonce sections - we cannot use these section symbols as they may disappear. */ |
8d1015a8 | 2038 | && (bsym->section->flags & (SEC_CODE | SEC_LINK_ONCE)) == SEC_CODE |
864bb26c NC |
2039 | /* Not all linkonce sections are flagged... */ |
2040 | && strncmp (S_GET_NAME (sym), ".gnu.linkonce", sizeof ".gnu.linkonce" - 1) != 0) | |
0df8ad28 | 2041 | { |
864bb26c NC |
2042 | /* Create a version note. */ |
2043 | frag_now_fix (); | |
2044 | note = frag_more (note_size); | |
2045 | memset (note, 0, note_size); | |
0df8ad28 | 2046 | |
864bb26c | 2047 | if (target_big_endian) |
0df8ad28 | 2048 | { |
864bb26c | 2049 | note[3] = 8; /* strlen (name) + 1. */ |
56c1b507 | 2050 | note[7] = desc_size; /* Two N-byte offsets. */ |
864bb26c NC |
2051 | note[10] = NT_GNU_BUILD_ATTRIBUTE_OPEN >> 8; |
2052 | note[11] = NT_GNU_BUILD_ATTRIBUTE_OPEN & 0xff; | |
2053 | } | |
2054 | else | |
2055 | { | |
2056 | note[0] = 8; /* strlen (name) + 1. */ | |
56c1b507 | 2057 | note[4] = desc_size; /* Two N-byte offsets. */ |
864bb26c NC |
2058 | note[8] = NT_GNU_BUILD_ATTRIBUTE_OPEN & 0xff; |
2059 | note[9] = NT_GNU_BUILD_ATTRIBUTE_OPEN >> 8; | |
0df8ad28 | 2060 | } |
0df8ad28 | 2061 | |
864bb26c NC |
2062 | /* The a1 version number indicates that this note was |
2063 | generated by the assembler and not the gcc annobin plugin. */ | |
2064 | memcpy (note + 12, "GA$\ 13a1", 8); | |
2065 | ||
2066 | /* Create a relocation to install the start address of the note... */ | |
56c1b507 | 2067 | create_note_reloc (sec, sym, total_size, 20, desc_size / 2, desc_reloc, 0, note); |
864bb26c NC |
2068 | |
2069 | /* ...and another one to install the end address. */ | |
56c1b507 NC |
2070 | create_note_reloc (sec, sym, total_size, desc2_offset, |
2071 | desc_size / 2, | |
2072 | desc_reloc, | |
fd361982 | 2073 | bfd_section_size (bsym->section), |
864bb26c NC |
2074 | note); |
2075 | ||
d1bcae83 L |
2076 | /* Mark the section symbol used in relocation so that it will be |
2077 | included in the symbol table. */ | |
2078 | symbol_mark_used_in_reloc (sym); | |
2079 | ||
864bb26c NC |
2080 | total_size += note_size; |
2081 | /* FIXME: Maybe add a note recording the assembler command line and version ? */ | |
2082 | } | |
0df8ad28 NC |
2083 | |
2084 | /* Install the note(s) into the section. */ | |
864bb26c NC |
2085 | if (total_size) |
2086 | bfd_set_section_contents (stdoutput, sec, (bfd_byte *) note, 0, total_size); | |
0df8ad28 NC |
2087 | subsegs_finish_section (sec); |
2088 | relax_segment (seg_info (sec)->frchainP->frch_root, sec, 0); | |
2089 | size_seg (stdoutput, sec, NULL); | |
2090 | } | |
2091 | #endif /* OBJ_ELF */ | |
d98b0e2b | 2092 | |
252b5132 RH |
2093 | /* Write the object file. */ |
2094 | ||
2095 | void | |
d7342424 | 2096 | write_object_file (void) |
252b5132 | 2097 | { |
32638454 | 2098 | struct relax_seg_info rsi; |
7be1c489 | 2099 | #ifndef WORKING_DOT_WORD |
efaf0ba4 | 2100 | fragS *fragP; /* Track along all frags. */ |
252b5132 RH |
2101 | #endif |
2102 | ||
85024cd8 AM |
2103 | subsegs_finish (); |
2104 | ||
16a87420 IS |
2105 | #ifdef md_pre_output_hook |
2106 | md_pre_output_hook; | |
2107 | #endif | |
2108 | ||
cdaa5616 IS |
2109 | #ifdef md_pre_relax_hook |
2110 | md_pre_relax_hook; | |
2111 | #endif | |
2112 | ||
252b5132 | 2113 | /* From now on, we don't care about sub-segments. Build one frag chain |
2b0f3761 | 2114 | for each segment. Linked through fr_next. */ |
252b5132 | 2115 | |
252b5132 RH |
2116 | /* Remove the sections created by gas for its own purposes. */ |
2117 | { | |
252b5132 RH |
2118 | int i; |
2119 | ||
5daa8fe7 L |
2120 | bfd_section_list_remove (stdoutput, reg_section); |
2121 | bfd_section_list_remove (stdoutput, expr_section); | |
2122 | stdoutput->section_count -= 2; | |
252b5132 RH |
2123 | i = 0; |
2124 | bfd_map_over_sections (stdoutput, renumber_sections, &i); | |
2125 | } | |
2126 | ||
2127 | bfd_map_over_sections (stdoutput, chain_frchains_together, (char *) 0); | |
252b5132 RH |
2128 | |
2129 | /* We have two segments. If user gave -R flag, then we must put the | |
2130 | data frags into the text segment. Do this before relaxing so | |
2131 | we know to take advantage of -R and make shorter addresses. */ | |
252b5132 RH |
2132 | if (flag_readonly_data_in_text) |
2133 | { | |
2134 | merge_data_into_text (); | |
2135 | } | |
252b5132 | 2136 | |
32638454 | 2137 | rsi.pass = 0; |
e46d99eb AM |
2138 | while (1) |
2139 | { | |
aacb5251 HPN |
2140 | #ifndef WORKING_DOT_WORD |
2141 | /* We need to reset the markers in the broken word list and | |
2142 | associated frags between calls to relax_segment (via | |
2143 | relax_seg). Since the broken word list is global, we do it | |
2144 | once per round, rather than locally in relax_segment for each | |
2145 | segment. */ | |
2146 | struct broken_word *brokp; | |
2147 | ||
2148 | for (brokp = broken_words; | |
2149 | brokp != (struct broken_word *) NULL; | |
2150 | brokp = brokp->next_broken_word) | |
2151 | { | |
2152 | brokp->added = 0; | |
2153 | ||
2154 | if (brokp->dispfrag != (fragS *) NULL | |
2155 | && brokp->dispfrag->fr_type == rs_broken_word) | |
2156 | brokp->dispfrag->fr_subtype = 0; | |
2157 | } | |
2158 | #endif | |
2159 | ||
32638454 AM |
2160 | rsi.changed = 0; |
2161 | bfd_map_over_sections (stdoutput, relax_seg, &rsi); | |
2162 | rsi.pass++; | |
2163 | if (!rsi.changed) | |
e46d99eb AM |
2164 | break; |
2165 | } | |
e027f3e8 | 2166 | |
87548816 NC |
2167 | /* Note - Most ports will use the default value of |
2168 | TC_FINALIZE_SYMS_BEFORE_SIZE_SEG, which 1. This will force | |
2169 | local symbols to be resolved, removing their frag information. | |
2170 | Some ports however, will not have finished relaxing all of | |
2171 | their frags and will still need the local symbol frag | |
2172 | information. These ports can set | |
2173 | TC_FINALIZE_SYMS_BEFORE_SIZE_SEG to 0. */ | |
2174 | finalize_syms = TC_FINALIZE_SYMS_BEFORE_SIZE_SEG; | |
2175 | ||
e46d99eb | 2176 | bfd_map_over_sections (stdoutput, size_seg, (char *) 0); |
e46d99eb | 2177 | |
38b87a1b NC |
2178 | /* Relaxation has completed. Freeze all syms. */ |
2179 | finalize_syms = 1; | |
2180 | ||
ba8826a8 AO |
2181 | dwarf2dbg_final_check (); |
2182 | ||
e0001a05 NC |
2183 | #ifdef md_post_relax_hook |
2184 | md_post_relax_hook; | |
2185 | #endif | |
2186 | ||
d98b0e2b TG |
2187 | #ifdef OBJ_ELF |
2188 | if (IS_ELF) | |
2189 | create_obj_attrs_section (); | |
2190 | #endif | |
2191 | ||
252b5132 RH |
2192 | #ifndef WORKING_DOT_WORD |
2193 | { | |
2194 | struct broken_word *lie; | |
2195 | struct broken_word **prevP; | |
2196 | ||
2197 | prevP = &broken_words; | |
2198 | for (lie = broken_words; lie; lie = lie->next_broken_word) | |
2199 | if (!lie->added) | |
2200 | { | |
2201 | expressionS exp; | |
2202 | ||
2203 | subseg_change (lie->seg, lie->subseg); | |
2204 | exp.X_op = O_subtract; | |
2205 | exp.X_add_symbol = lie->add; | |
2206 | exp.X_op_symbol = lie->sub; | |
2207 | exp.X_add_number = lie->addnum; | |
252b5132 RH |
2208 | #ifdef TC_CONS_FIX_NEW |
2209 | TC_CONS_FIX_NEW (lie->frag, | |
efaf0ba4 | 2210 | lie->word_goes_here - lie->frag->fr_literal, |
62ebcb5c | 2211 | 2, &exp, TC_PARSE_CONS_RETURN_NONE); |
252b5132 RH |
2212 | #else |
2213 | fix_new_exp (lie->frag, | |
2214 | lie->word_goes_here - lie->frag->fr_literal, | |
2215 | 2, &exp, 0, BFD_RELOC_16); | |
2216 | #endif | |
252b5132 RH |
2217 | *prevP = lie->next_broken_word; |
2218 | } | |
2219 | else | |
2220 | prevP = &(lie->next_broken_word); | |
2221 | ||
2222 | for (lie = broken_words; lie;) | |
2223 | { | |
2224 | struct broken_word *untruth; | |
2225 | char *table_ptr; | |
2226 | addressT table_addr; | |
2227 | addressT from_addr, to_addr; | |
2228 | int n, m; | |
2229 | ||
2230 | subseg_change (lie->seg, lie->subseg); | |
2231 | fragP = lie->dispfrag; | |
2232 | ||
2233 | /* Find out how many broken_words go here. */ | |
2234 | n = 0; | |
efaf0ba4 NC |
2235 | for (untruth = lie; |
2236 | untruth && untruth->dispfrag == fragP; | |
2237 | untruth = untruth->next_broken_word) | |
252b5132 RH |
2238 | if (untruth->added == 1) |
2239 | n++; | |
2240 | ||
2241 | table_ptr = lie->dispfrag->fr_opcode; | |
efaf0ba4 NC |
2242 | table_addr = (lie->dispfrag->fr_address |
2243 | + (table_ptr - lie->dispfrag->fr_literal)); | |
252b5132 RH |
2244 | /* Create the jump around the long jumps. This is a short |
2245 | jump from table_ptr+0 to table_ptr+n*long_jump_size. */ | |
2246 | from_addr = table_addr; | |
2247 | to_addr = table_addr + md_short_jump_size + n * md_long_jump_size; | |
efaf0ba4 NC |
2248 | md_create_short_jump (table_ptr, from_addr, to_addr, lie->dispfrag, |
2249 | lie->add); | |
252b5132 RH |
2250 | table_ptr += md_short_jump_size; |
2251 | table_addr += md_short_jump_size; | |
2252 | ||
efaf0ba4 NC |
2253 | for (m = 0; |
2254 | lie && lie->dispfrag == fragP; | |
2255 | m++, lie = lie->next_broken_word) | |
252b5132 RH |
2256 | { |
2257 | if (lie->added == 2) | |
2258 | continue; | |
efaf0ba4 | 2259 | /* Patch the jump table. */ |
187af7df | 2260 | for (untruth = (struct broken_word *) (fragP->fr_symbol); |
efaf0ba4 NC |
2261 | untruth && untruth->dispfrag == fragP; |
2262 | untruth = untruth->next_broken_word) | |
252b5132 RH |
2263 | { |
2264 | if (untruth->use_jump == lie) | |
187af7df HPN |
2265 | { |
2266 | /* This is the offset from ??? to table_ptr+0. | |
2267 | The target is the same for all users of this | |
2268 | md_long_jump, but the "sub" bases (and hence the | |
2269 | offsets) may be different. */ | |
2270 | addressT to_word = table_addr - S_GET_VALUE (untruth->sub); | |
2271 | #ifdef TC_CHECK_ADJUSTED_BROKEN_DOT_WORD | |
2272 | TC_CHECK_ADJUSTED_BROKEN_DOT_WORD (to_word, untruth); | |
2273 | #endif | |
2274 | md_number_to_chars (untruth->word_goes_here, to_word, 2); | |
2275 | } | |
252b5132 RH |
2276 | } |
2277 | ||
efaf0ba4 NC |
2278 | /* Install the long jump. */ |
2279 | /* This is a long jump from table_ptr+0 to the final target. */ | |
252b5132 RH |
2280 | from_addr = table_addr; |
2281 | to_addr = S_GET_VALUE (lie->add) + lie->addnum; | |
efaf0ba4 NC |
2282 | md_create_long_jump (table_ptr, from_addr, to_addr, lie->dispfrag, |
2283 | lie->add); | |
252b5132 RH |
2284 | table_ptr += md_long_jump_size; |
2285 | table_addr += md_long_jump_size; | |
2286 | } | |
2287 | } | |
2288 | } | |
efaf0ba4 | 2289 | #endif /* not WORKING_DOT_WORD */ |
252b5132 | 2290 | |
252b5132 RH |
2291 | /* Resolve symbol values. This needs to be done before processing |
2292 | the relocations. */ | |
2293 | if (symbol_rootP) | |
2294 | { | |
2295 | symbolS *symp; | |
2296 | ||
2297 | for (symp = symbol_rootP; symp; symp = symbol_next (symp)) | |
6386f3a7 | 2298 | resolve_symbol_value (symp); |
252b5132 | 2299 | } |
49309057 | 2300 | resolve_local_symbol_values (); |
05e9452c | 2301 | resolve_reloc_expr_symbols (); |
252b5132 | 2302 | |
0df8ad28 NC |
2303 | #ifdef OBJ_ELF |
2304 | if (IS_ELF) | |
2305 | maybe_generate_build_notes (); | |
2306 | #endif | |
269b4ded | 2307 | |
252b5132 RH |
2308 | PROGRESS (1); |
2309 | ||
2310 | #ifdef tc_frob_file_before_adjust | |
2311 | tc_frob_file_before_adjust (); | |
2312 | #endif | |
2313 | #ifdef obj_frob_file_before_adjust | |
2314 | obj_frob_file_before_adjust (); | |
2315 | #endif | |
2316 | ||
efaf0ba4 | 2317 | bfd_map_over_sections (stdoutput, adjust_reloc_syms, (char *) 0); |
252b5132 | 2318 | |
a161fe53 AM |
2319 | #ifdef tc_frob_file_before_fix |
2320 | tc_frob_file_before_fix (); | |
2321 | #endif | |
2322 | #ifdef obj_frob_file_before_fix | |
2323 | obj_frob_file_before_fix (); | |
2324 | #endif | |
2325 | ||
2326 | bfd_map_over_sections (stdoutput, fix_segment, (char *) 0); | |
2327 | ||
252b5132 RH |
2328 | /* Set up symbol table, and write it out. */ |
2329 | if (symbol_rootP) | |
2330 | { | |
2331 | symbolS *symp; | |
aaac53f5 | 2332 | bfd_boolean skip_next_symbol = FALSE; |
252b5132 RH |
2333 | |
2334 | for (symp = symbol_rootP; symp; symp = symbol_next (symp)) | |
2335 | { | |
2336 | int punt = 0; | |
2337 | const char *name; | |
2338 | ||
aaac53f5 HPN |
2339 | if (skip_next_symbol) |
2340 | { | |
2341 | /* Don't do anything besides moving the value of the | |
2342 | symbol from the GAS value-field to the BFD value-field. */ | |
2343 | symbol_get_bfdsym (symp)->value = S_GET_VALUE (symp); | |
2344 | skip_next_symbol = FALSE; | |
2345 | continue; | |
2346 | } | |
2347 | ||
49309057 | 2348 | if (symbol_mri_common_p (symp)) |
252b5132 RH |
2349 | { |
2350 | if (S_IS_EXTERNAL (symp)) | |
2351 | as_bad (_("%s: global symbols not supported in common sections"), | |
2352 | S_GET_NAME (symp)); | |
2353 | symbol_remove (symp, &symbol_rootP, &symbol_lastP); | |
2354 | continue; | |
2355 | } | |
2356 | ||
2357 | name = S_GET_NAME (symp); | |
2358 | if (name) | |
2359 | { | |
efaf0ba4 NC |
2360 | const char *name2 = |
2361 | decode_local_label_name ((char *) S_GET_NAME (symp)); | |
252b5132 RH |
2362 | /* They only differ if `name' is a fb or dollar local |
2363 | label name. */ | |
2364 | if (name2 != name && ! S_IS_DEFINED (symp)) | |
0e389e77 | 2365 | as_bad (_("local label `%s' is not defined"), name2); |
252b5132 RH |
2366 | } |
2367 | ||
2368 | /* Do it again, because adjust_reloc_syms might introduce | |
2369 | more symbols. They'll probably only be section symbols, | |
2370 | but they'll still need to have the values computed. */ | |
6386f3a7 | 2371 | resolve_symbol_value (symp); |
252b5132 RH |
2372 | |
2373 | /* Skip symbols which were equated to undefined or common | |
b4b24b79 | 2374 | symbols. */ |
06e77878 AO |
2375 | if (symbol_equated_reloc_p (symp) |
2376 | || S_IS_WEAKREFR (symp)) | |
252b5132 | 2377 | { |
91d6fa6a NC |
2378 | const char *sname = S_GET_NAME (symp); |
2379 | ||
60938e80 | 2380 | if (S_IS_COMMON (symp) |
91d6fa6a | 2381 | && !TC_FAKE_LABEL (sname) |
76db0a2e | 2382 | && !S_IS_WEAKREFR (symp)) |
60938e80 L |
2383 | { |
2384 | expressionS *e = symbol_get_value_expression (symp); | |
91d6fa6a | 2385 | |
76db0a2e | 2386 | as_bad (_("`%s' can't be equated to common symbol `%s'"), |
91d6fa6a | 2387 | sname, S_GET_NAME (e->X_add_symbol)); |
60938e80 | 2388 | } |
d0548f34 L |
2389 | if (S_GET_SEGMENT (symp) == reg_section) |
2390 | { | |
2391 | /* Report error only if we know the symbol name. */ | |
2392 | if (S_GET_NAME (symp) != reg_section->name) | |
2393 | as_bad (_("can't make global register symbol `%s'"), | |
91d6fa6a | 2394 | sname); |
d0548f34 | 2395 | } |
252b5132 RH |
2396 | symbol_remove (symp, &symbol_rootP, &symbol_lastP); |
2397 | continue; | |
2398 | } | |
2399 | ||
252b5132 RH |
2400 | #ifdef obj_frob_symbol |
2401 | obj_frob_symbol (symp, punt); | |
2402 | #endif | |
2403 | #ifdef tc_frob_symbol | |
49309057 | 2404 | if (! punt || symbol_used_in_reloc_p (symp)) |
252b5132 RH |
2405 | tc_frob_symbol (symp, punt); |
2406 | #endif | |
2407 | ||
2408 | /* If we don't want to keep this symbol, splice it out of | |
2409 | the chain now. If EMIT_SECTION_SYMBOLS is 0, we never | |
2410 | want section symbols. Otherwise, we skip local symbols | |
2411 | and symbols that the frob_symbol macros told us to punt, | |
2412 | but we keep such symbols if they are used in relocs. */ | |
a161fe53 AM |
2413 | if (symp == abs_section_sym |
2414 | || (! EMIT_SECTION_SYMBOLS | |
2415 | && symbol_section_p (symp)) | |
e97b3f28 | 2416 | /* Note that S_IS_EXTERNAL and S_IS_LOCAL are not always |
252b5132 RH |
2417 | opposites. Sometimes the former checks flags and the |
2418 | latter examines the name... */ | |
e97b3f28 | 2419 | || (!S_IS_EXTERNAL (symp) |
461b725f AO |
2420 | && (punt || S_IS_LOCAL (symp) || |
2421 | (S_IS_WEAKREFD (symp) && ! symbol_used_p (symp))) | |
49309057 | 2422 | && ! symbol_used_in_reloc_p (symp))) |
252b5132 RH |
2423 | { |
2424 | symbol_remove (symp, &symbol_rootP, &symbol_lastP); | |
efaf0ba4 | 2425 | |
252b5132 RH |
2426 | /* After symbol_remove, symbol_next(symp) still returns |
2427 | the one that came after it in the chain. So we don't | |
2428 | need to do any extra cleanup work here. */ | |
252b5132 RH |
2429 | continue; |
2430 | } | |
2431 | ||
2432 | /* Make sure we really got a value for the symbol. */ | |
49309057 | 2433 | if (! symbol_resolved_p (symp)) |
252b5132 | 2434 | { |
0e389e77 | 2435 | as_bad (_("can't resolve value for symbol `%s'"), |
252b5132 | 2436 | S_GET_NAME (symp)); |
49309057 | 2437 | symbol_mark_resolved (symp); |
252b5132 RH |
2438 | } |
2439 | ||
2440 | /* Set the value into the BFD symbol. Up til now the value | |
2441 | has only been kept in the gas symbolS struct. */ | |
49309057 | 2442 | symbol_get_bfdsym (symp)->value = S_GET_VALUE (symp); |
aaac53f5 HPN |
2443 | |
2444 | /* A warning construct is a warning symbol followed by the | |
2445 | symbol warned about. Don't let anything object-format or | |
2446 | target-specific muck with it; it's ready for output. */ | |
2447 | if (symbol_get_bfdsym (symp)->flags & BSF_WARNING) | |
2448 | skip_next_symbol = TRUE; | |
252b5132 RH |
2449 | } |
2450 | } | |
2451 | ||
2452 | PROGRESS (1); | |
2453 | ||
2454 | /* Now do any format-specific adjustments to the symbol table, such | |
2455 | as adding file symbols. */ | |
2456 | #ifdef tc_adjust_symtab | |
2457 | tc_adjust_symtab (); | |
2458 | #endif | |
2459 | #ifdef obj_adjust_symtab | |
2460 | obj_adjust_symtab (); | |
2461 | #endif | |
2462 | ||
d0548f34 | 2463 | /* Stop if there is an error. */ |
82194874 | 2464 | if (!flag_always_generate_output && had_errors ()) |
d0548f34 L |
2465 | return; |
2466 | ||
252b5132 RH |
2467 | /* Now that all the sizes are known, and contents correct, we can |
2468 | start writing to the file. */ | |
2ae08483 | 2469 | set_symtab (); |
252b5132 RH |
2470 | |
2471 | /* If *_frob_file changes the symbol value at this point, it is | |
2472 | responsible for moving the changed value into symp->bsym->value | |
2473 | as well. Hopefully all symbol value changing can be done in | |
2474 | *_frob_symbol. */ | |
2475 | #ifdef tc_frob_file | |
2476 | tc_frob_file (); | |
2477 | #endif | |
2478 | #ifdef obj_frob_file | |
2479 | obj_frob_file (); | |
2480 | #endif | |
f3d2b04b KT |
2481 | #ifdef obj_coff_generate_pdata |
2482 | obj_coff_generate_pdata (); | |
2483 | #endif | |
0df8ad28 | 2484 | |
252b5132 RH |
2485 | bfd_map_over_sections (stdoutput, write_relocs, (char *) 0); |
2486 | ||
f1c2d4af | 2487 | #ifdef tc_frob_file_after_relocs |
252b5132 RH |
2488 | tc_frob_file_after_relocs (); |
2489 | #endif | |
2490 | #ifdef obj_frob_file_after_relocs | |
2491 | obj_frob_file_after_relocs (); | |
2492 | #endif | |
f1c2d4af | 2493 | |
b8871f35 L |
2494 | #if defined OBJ_ELF || defined OBJ_MAYBE_ELF |
2495 | if (IS_ELF && flag_use_elf_stt_common) | |
2496 | stdoutput->flags |= BFD_CONVERT_ELF_COMMON | BFD_USE_ELF_STT_COMMON; | |
2497 | #endif | |
2498 | ||
0acf065b CC |
2499 | /* Once all relocations have been written, we can compress the |
2500 | contents of the debug sections. This needs to be done before | |
2501 | we start writing any sections, because it will affect the file | |
2502 | layout, which is fixed once we start writing contents. */ | |
2503 | if (flag_compress_debug) | |
8ecb73dd L |
2504 | { |
2505 | if (flag_compress_debug == COMPRESS_DEBUG_GABI_ZLIB) | |
2506 | stdoutput->flags |= BFD_COMPRESS | BFD_COMPRESS_GABI; | |
2507 | else | |
2508 | stdoutput->flags |= BFD_COMPRESS; | |
2509 | bfd_map_over_sections (stdoutput, compress_debug, (char *) 0); | |
2510 | } | |
0acf065b | 2511 | |
252b5132 | 2512 | bfd_map_over_sections (stdoutput, write_contents, (char *) 0); |
252b5132 | 2513 | } |
252b5132 RH |
2514 | |
2515 | #ifdef TC_GENERIC_RELAX_TABLE | |
b65d68b8 L |
2516 | #ifndef md_generic_table_relax_frag |
2517 | #define md_generic_table_relax_frag relax_frag | |
2518 | #endif | |
2519 | ||
252b5132 RH |
2520 | /* Relax a fragment by scanning TC_GENERIC_RELAX_TABLE. */ |
2521 | ||
2522 | long | |
d7342424 | 2523 | relax_frag (segT segment, fragS *fragP, long stretch) |
252b5132 RH |
2524 | { |
2525 | const relax_typeS *this_type; | |
2526 | const relax_typeS *start_type; | |
2527 | relax_substateT next_state; | |
2528 | relax_substateT this_state; | |
685736be | 2529 | offsetT growth; |
38686296 AM |
2530 | offsetT aim; |
2531 | addressT target; | |
2532 | addressT address; | |
2533 | symbolS *symbolP; | |
2534 | const relax_typeS *table; | |
2535 | ||
2536 | target = fragP->fr_offset; | |
37a58883 | 2537 | address = fragP->fr_address + fragP->fr_fix; |
38686296 | 2538 | table = TC_GENERIC_RELAX_TABLE; |
252b5132 RH |
2539 | this_state = fragP->fr_subtype; |
2540 | start_type = this_type = table + this_state; | |
38686296 | 2541 | symbolP = fragP->fr_symbol; |
252b5132 RH |
2542 | |
2543 | if (symbolP) | |
2544 | { | |
c842b53a ILT |
2545 | fragS *sym_frag; |
2546 | ||
2547 | sym_frag = symbol_get_frag (symbolP); | |
2548 | ||
252b5132 | 2549 | #ifndef DIFF_EXPR_OK |
c842b53a | 2550 | know (sym_frag != NULL); |
252b5132 | 2551 | #endif |
a161fe53 | 2552 | know (S_GET_SEGMENT (symbolP) != absolute_section |
c842b53a | 2553 | || sym_frag == &zero_address_frag); |
ac62c346 | 2554 | target += S_GET_VALUE (symbolP); |
252b5132 | 2555 | |
e35a414d AM |
2556 | /* If SYM_FRAG has yet to be reached on this pass, assume it |
2557 | will move by STRETCH just as we did, unless there is an | |
2558 | alignment frag between here and SYM_FRAG. An alignment may | |
2559 | well absorb any STRETCH, and we don't want to choose a larger | |
2560 | branch insn by overestimating the needed reach of this | |
2561 | branch. It isn't critical to calculate TARGET exactly; We | |
2562 | know we'll be doing another pass if STRETCH is non-zero. */ | |
252b5132 | 2563 | |
c842b53a | 2564 | if (stretch != 0 |
38686296 AM |
2565 | && sym_frag->relax_marker != fragP->relax_marker |
2566 | && S_GET_SEGMENT (symbolP) == segment) | |
252b5132 | 2567 | { |
e35a414d AM |
2568 | if (stretch < 0 |
2569 | || sym_frag->region == fragP->region) | |
2570 | target += stretch; | |
e5940dff AM |
2571 | /* If we get here we know we have a forward branch. This |
2572 | relax pass may have stretched previous instructions so | |
2573 | far that omitting STRETCH would make the branch | |
2574 | negative. Don't allow this in case the negative reach is | |
2575 | large enough to require a larger branch instruction. */ | |
2576 | else if (target < address) | |
37a58883 | 2577 | return 0; |
252b5132 RH |
2578 | } |
2579 | } | |
2580 | ||
37a58883 | 2581 | aim = target - address; |
252b5132 | 2582 | #ifdef TC_PCREL_ADJUST |
37a58883 | 2583 | /* Currently only the ns32k and arc needs this. */ |
efaf0ba4 | 2584 | aim += TC_PCREL_ADJUST (fragP); |
efaf0ba4 | 2585 | #endif |
59c871b4 BE |
2586 | |
2587 | #ifdef md_prepare_relax_scan | |
2588 | /* Formerly called M68K_AIM_KLUDGE. */ | |
252b5132 RH |
2589 | md_prepare_relax_scan (fragP, address, aim, this_state, this_type); |
2590 | #endif | |
2591 | ||
2592 | if (aim < 0) | |
2593 | { | |
efaf0ba4 | 2594 | /* Look backwards. */ |
252b5132 RH |
2595 | for (next_state = this_type->rlx_more; next_state;) |
2596 | if (aim >= this_type->rlx_backward) | |
2597 | next_state = 0; | |
2598 | else | |
2599 | { | |
efaf0ba4 | 2600 | /* Grow to next state. */ |
252b5132 RH |
2601 | this_state = next_state; |
2602 | this_type = table + this_state; | |
2603 | next_state = this_type->rlx_more; | |
2604 | } | |
2605 | } | |
2606 | else | |
2607 | { | |
efaf0ba4 | 2608 | /* Look forwards. */ |
252b5132 RH |
2609 | for (next_state = this_type->rlx_more; next_state;) |
2610 | if (aim <= this_type->rlx_forward) | |
2611 | next_state = 0; | |
2612 | else | |
2613 | { | |
efaf0ba4 | 2614 | /* Grow to next state. */ |
252b5132 RH |
2615 | this_state = next_state; |
2616 | this_type = table + this_state; | |
2617 | next_state = this_type->rlx_more; | |
2618 | } | |
2619 | } | |
2620 | ||
2621 | growth = this_type->rlx_length - start_type->rlx_length; | |
2622 | if (growth != 0) | |
2623 | fragP->fr_subtype = this_state; | |
2624 | return growth; | |
2625 | } | |
2626 | ||
efaf0ba4 | 2627 | #endif /* defined (TC_GENERIC_RELAX_TABLE) */ |
252b5132 RH |
2628 | |
2629 | /* Relax_align. Advance location counter to next address that has 'alignment' | |
2630 | lowest order bits all 0s, return size of adjustment made. */ | |
2631 | static relax_addressT | |
ed9e98c2 AM |
2632 | relax_align (relax_addressT address, /* Address now. */ |
2633 | int alignment /* Alignment (binary). */) | |
252b5132 RH |
2634 | { |
2635 | relax_addressT mask; | |
2636 | relax_addressT new_address; | |
2637 | ||
65879393 | 2638 | mask = ~((relax_addressT) ~0 << alignment); |
252b5132 RH |
2639 | new_address = (address + mask) & (~mask); |
2640 | #ifdef LINKER_RELAXING_SHRINKS_ONLY | |
2641 | if (linkrelax) | |
2642 | /* We must provide lots of padding, so the linker can discard it | |
2643 | when needed. The linker will not add extra space, ever. */ | |
2644 | new_address += (1 << alignment); | |
2645 | #endif | |
2646 | return (new_address - address); | |
2647 | } | |
2648 | ||
efaf0ba4 NC |
2649 | /* Now we have a segment, not a crowd of sub-segments, we can make |
2650 | fr_address values. | |
58a77e41 | 2651 | |
efaf0ba4 | 2652 | Relax the frags. |
58a77e41 | 2653 | |
efaf0ba4 NC |
2654 | After this, all frags in this segment have addresses that are correct |
2655 | within the segment. Since segments live in different file addresses, | |
2656 | these frag addresses may not be the same as final object-file | |
2657 | addresses. */ | |
2658 | ||
e46d99eb | 2659 | int |
32638454 | 2660 | relax_segment (struct frag *segment_frag_root, segT segment, int pass) |
252b5132 | 2661 | { |
4111faa5 NC |
2662 | unsigned long frag_count; |
2663 | struct frag *fragP; | |
2664 | relax_addressT address; | |
e35a414d | 2665 | int region; |
e46d99eb AM |
2666 | int ret; |
2667 | ||
efaf0ba4 | 2668 | /* In case md_estimate_size_before_relax() wants to make fixSs. */ |
252b5132 RH |
2669 | subseg_change (segment, 0); |
2670 | ||
2671 | /* For each frag in segment: count and store (a 1st guess of) | |
2672 | fr_address. */ | |
2673 | address = 0; | |
e35a414d | 2674 | region = 0; |
4111faa5 NC |
2675 | for (frag_count = 0, fragP = segment_frag_root; |
2676 | fragP; | |
2677 | fragP = fragP->fr_next, frag_count ++) | |
252b5132 | 2678 | { |
e35a414d | 2679 | fragP->region = region; |
38686296 | 2680 | fragP->relax_marker = 0; |
252b5132 RH |
2681 | fragP->fr_address = address; |
2682 | address += fragP->fr_fix; | |
2683 | ||
2684 | switch (fragP->fr_type) | |
2685 | { | |
2686 | case rs_fill: | |
2687 | address += fragP->fr_offset * fragP->fr_var; | |
2688 | break; | |
2689 | ||
2690 | case rs_align: | |
2691 | case rs_align_code: | |
0a9ef439 | 2692 | case rs_align_test: |
252b5132 RH |
2693 | { |
2694 | addressT offset = relax_align (address, (int) fragP->fr_offset); | |
2695 | ||
2696 | if (fragP->fr_subtype != 0 && offset > fragP->fr_subtype) | |
2697 | offset = 0; | |
2698 | ||
2699 | if (offset % fragP->fr_var != 0) | |
2700 | { | |
54d3cad9 | 2701 | as_bad_where (fragP->fr_file, fragP->fr_line, |
992a06ee AM |
2702 | ngettext ("alignment padding (%lu byte) " |
2703 | "not a multiple of %ld", | |
2704 | "alignment padding (%lu bytes) " | |
2705 | "not a multiple of %ld", | |
2706 | (unsigned long) offset), | |
54d3cad9 | 2707 | (unsigned long) offset, (long) fragP->fr_var); |
252b5132 RH |
2708 | offset -= (offset % fragP->fr_var); |
2709 | } | |
2710 | ||
2711 | address += offset; | |
e35a414d | 2712 | region += 1; |
252b5132 RH |
2713 | } |
2714 | break; | |
2715 | ||
2716 | case rs_org: | |
252b5132 | 2717 | /* Assume .org is nugatory. It will grow with 1st relax. */ |
e35a414d AM |
2718 | region += 1; |
2719 | break; | |
2720 | ||
2721 | case rs_space: | |
62a02d25 | 2722 | case rs_space_nop: |
252b5132 RH |
2723 | break; |
2724 | ||
2725 | case rs_machine_dependent: | |
e0890092 AM |
2726 | /* If fr_symbol is an expression, this call to |
2727 | resolve_symbol_value sets up the correct segment, which will | |
2728 | likely be needed in md_estimate_size_before_relax. */ | |
2729 | if (fragP->fr_symbol) | |
2730 | resolve_symbol_value (fragP->fr_symbol); | |
2731 | ||
252b5132 RH |
2732 | address += md_estimate_size_before_relax (fragP, segment); |
2733 | break; | |
2734 | ||
2735 | #ifndef WORKING_DOT_WORD | |
efaf0ba4 | 2736 | /* Broken words don't concern us yet. */ |
252b5132 RH |
2737 | case rs_broken_word: |
2738 | break; | |
2739 | #endif | |
2740 | ||
2741 | case rs_leb128: | |
efaf0ba4 | 2742 | /* Initial guess is always 1; doing otherwise can result in |
252b5132 RH |
2743 | stable solutions that are larger than the minimum. */ |
2744 | address += fragP->fr_offset = 1; | |
2745 | break; | |
2746 | ||
2747 | case rs_cfa: | |
2748 | address += eh_frame_estimate_size_before_relax (fragP); | |
2749 | break; | |
2750 | ||
220e750f RH |
2751 | case rs_dwarf2dbg: |
2752 | address += dwarf2dbg_estimate_size_before_relax (fragP); | |
2753 | break; | |
2754 | ||
252b5132 RH |
2755 | default: |
2756 | BAD_CASE (fragP->fr_type); | |
2757 | break; | |
efaf0ba4 NC |
2758 | } |
2759 | } | |
252b5132 RH |
2760 | |
2761 | /* Do relax(). */ | |
2762 | { | |
4111faa5 | 2763 | unsigned long max_iterations; |
d1c5f158 AM |
2764 | |
2765 | /* Cumulative address adjustment. */ | |
2766 | offsetT stretch; | |
2767 | ||
2768 | /* Have we made any adjustment this pass? We can't just test | |
2769 | stretch because one piece of code may have grown and another | |
2770 | shrank. */ | |
2771 | int stretched; | |
2772 | ||
2773 | /* Most horrible, but gcc may give us some exception data that | |
2774 | is impossible to assemble, of the form | |
2775 | ||
2776 | .align 4 | |
2777 | .byte 0, 0 | |
2778 | .uleb128 end - start | |
2779 | start: | |
2780 | .space 128*128 - 1 | |
2781 | .align 4 | |
2782 | end: | |
2783 | ||
2784 | If the leb128 is two bytes in size, then end-start is 128*128, | |
2785 | which requires a three byte leb128. If the leb128 is three | |
2786 | bytes in size, then end-start is 128*128-1, which requires a | |
2787 | two byte leb128. We work around this dilemma by inserting | |
2788 | an extra 4 bytes of alignment just after the .align. This | |
2789 | works because the data after the align is accessed relative to | |
2790 | the end label. | |
2791 | ||
2792 | This counter is used in a tiny state machine to detect | |
2793 | whether a leb128 followed by an align is impossible to | |
2794 | relax. */ | |
2795 | int rs_leb128_fudge = 0; | |
252b5132 | 2796 | |
4111faa5 NC |
2797 | /* We want to prevent going into an infinite loop where one frag grows |
2798 | depending upon the location of a symbol which is in turn moved by | |
2799 | the growing frag. eg: | |
2800 | ||
b4b24b79 AM |
2801 | foo = . |
2802 | .org foo+16 | |
2803 | foo = . | |
4111faa5 | 2804 | |
b4b24b79 | 2805 | So we dictate that this algorithm can be at most O2. */ |
4111faa5 NC |
2806 | max_iterations = frag_count * frag_count; |
2807 | /* Check for overflow. */ | |
2808 | if (max_iterations < frag_count) | |
2809 | max_iterations = frag_count; | |
2810 | ||
32638454 | 2811 | ret = 0; |
252b5132 RH |
2812 | do |
2813 | { | |
e46d99eb AM |
2814 | stretch = 0; |
2815 | stretched = 0; | |
58a77e41 | 2816 | |
252b5132 RH |
2817 | for (fragP = segment_frag_root; fragP; fragP = fragP->fr_next) |
2818 | { | |
685736be | 2819 | offsetT growth = 0; |
252b5132 RH |
2820 | addressT was_address; |
2821 | offsetT offset; | |
2822 | symbolS *symbolP; | |
2823 | ||
38686296 | 2824 | fragP->relax_marker ^= 1; |
252b5132 RH |
2825 | was_address = fragP->fr_address; |
2826 | address = fragP->fr_address += stretch; | |
2827 | symbolP = fragP->fr_symbol; | |
2828 | offset = fragP->fr_offset; | |
2829 | ||
2830 | switch (fragP->fr_type) | |
2831 | { | |
efaf0ba4 | 2832 | case rs_fill: /* .fill never relaxes. */ |
252b5132 RH |
2833 | growth = 0; |
2834 | break; | |
2835 | ||
2836 | #ifndef WORKING_DOT_WORD | |
2837 | /* JF: This is RMS's idea. I do *NOT* want to be blamed | |
2838 | for it I do not want to write it. I do not want to have | |
2839 | anything to do with it. This is not the proper way to | |
2840 | implement this misfeature. */ | |
2841 | case rs_broken_word: | |
2842 | { | |
2843 | struct broken_word *lie; | |
2844 | struct broken_word *untruth; | |
2845 | ||
2846 | /* Yes this is ugly (storing the broken_word pointer | |
2847 | in the symbol slot). Still, this whole chunk of | |
2848 | code is ugly, and I don't feel like doing anything | |
2849 | about it. Think of it as stubbornness in action. */ | |
2850 | growth = 0; | |
2851 | for (lie = (struct broken_word *) (fragP->fr_symbol); | |
2852 | lie && lie->dispfrag == fragP; | |
2853 | lie = lie->next_broken_word) | |
2854 | { | |
2855 | ||
2856 | if (lie->added) | |
2857 | continue; | |
2858 | ||
ac62c346 | 2859 | offset = (S_GET_VALUE (lie->add) |
252b5132 | 2860 | + lie->addnum |
ac62c346 | 2861 | - S_GET_VALUE (lie->sub)); |
252b5132 RH |
2862 | if (offset <= -32768 || offset >= 32767) |
2863 | { | |
2864 | if (flag_warn_displacement) | |
2865 | { | |
2866 | char buf[50]; | |
2867 | sprint_value (buf, (addressT) lie->addnum); | |
54d3cad9 AM |
2868 | as_warn_where (fragP->fr_file, fragP->fr_line, |
2869 | _(".word %s-%s+%s didn't fit"), | |
2870 | S_GET_NAME (lie->add), | |
2871 | S_GET_NAME (lie->sub), | |
2872 | buf); | |
252b5132 | 2873 | } |
252b5132 RH |
2874 | if (fragP->fr_subtype == 0) |
2875 | { | |
2876 | fragP->fr_subtype++; | |
2877 | growth += md_short_jump_size; | |
2878 | } | |
187af7df HPN |
2879 | |
2880 | /* Redirect *all* words of this table with the same | |
2881 | target, lest we have to handle the case where the | |
2882 | same target but with a offset that fits on this | |
2883 | round overflows at the next relaxation round. */ | |
2884 | for (untruth = (struct broken_word *) (fragP->fr_symbol); | |
252b5132 RH |
2885 | untruth && untruth->dispfrag == lie->dispfrag; |
2886 | untruth = untruth->next_broken_word) | |
49309057 ILT |
2887 | if ((symbol_get_frag (untruth->add) |
2888 | == symbol_get_frag (lie->add)) | |
2889 | && (S_GET_VALUE (untruth->add) | |
2890 | == S_GET_VALUE (lie->add))) | |
252b5132 RH |
2891 | { |
2892 | untruth->added = 2; | |
2893 | untruth->use_jump = lie; | |
2894 | } | |
187af7df HPN |
2895 | |
2896 | lie->added = 1; | |
252b5132 RH |
2897 | growth += md_long_jump_size; |
2898 | } | |
2899 | } | |
2900 | ||
2901 | break; | |
efaf0ba4 | 2902 | } /* case rs_broken_word */ |
252b5132 RH |
2903 | #endif |
2904 | case rs_align: | |
2905 | case rs_align_code: | |
0a9ef439 | 2906 | case rs_align_test: |
252b5132 RH |
2907 | { |
2908 | addressT oldoff, newoff; | |
2909 | ||
2910 | oldoff = relax_align (was_address + fragP->fr_fix, | |
2911 | (int) offset); | |
2912 | newoff = relax_align (address + fragP->fr_fix, | |
2913 | (int) offset); | |
2914 | ||
2915 | if (fragP->fr_subtype != 0) | |
2916 | { | |
2917 | if (oldoff > fragP->fr_subtype) | |
2918 | oldoff = 0; | |
2919 | if (newoff > fragP->fr_subtype) | |
2920 | newoff = 0; | |
2921 | } | |
2922 | ||
2923 | growth = newoff - oldoff; | |
d1c5f158 AM |
2924 | |
2925 | /* If this align happens to follow a leb128 and | |
2926 | we have determined that the leb128 is bouncing | |
2927 | in size, then break the cycle by inserting an | |
2928 | extra alignment. */ | |
2929 | if (growth < 0 | |
2930 | && (rs_leb128_fudge & 16) != 0 | |
2931 | && (rs_leb128_fudge & 15) >= 2) | |
2932 | { | |
2933 | segment_info_type *seginfo = seg_info (segment); | |
2934 | struct obstack *ob = &seginfo->frchainP->frch_obstack; | |
2935 | struct frag *newf; | |
2936 | ||
2937 | newf = frag_alloc (ob); | |
2938 | obstack_blank_fast (ob, fragP->fr_var); | |
2939 | obstack_finish (ob); | |
2940 | memcpy (newf, fragP, SIZEOF_STRUCT_FRAG); | |
2941 | memcpy (newf->fr_literal, | |
2942 | fragP->fr_literal + fragP->fr_fix, | |
2943 | fragP->fr_var); | |
2944 | newf->fr_type = rs_fill; | |
20f5cfbd | 2945 | newf->fr_address = address + fragP->fr_fix + newoff; |
d1c5f158 AM |
2946 | newf->fr_fix = 0; |
2947 | newf->fr_offset = (((offsetT) 1 << fragP->fr_offset) | |
2948 | / fragP->fr_var); | |
2949 | if (newf->fr_offset * newf->fr_var | |
2950 | != (offsetT) 1 << fragP->fr_offset) | |
2951 | { | |
2952 | newf->fr_offset = (offsetT) 1 << fragP->fr_offset; | |
2953 | newf->fr_var = 1; | |
2954 | } | |
20f5cfbd | 2955 | /* Include size of new frag in GROWTH. */ |
d1c5f158 | 2956 | growth += newf->fr_offset * newf->fr_var; |
20f5cfbd AM |
2957 | /* Adjust the new frag address for the amount |
2958 | we'll add when we process the new frag. */ | |
2959 | newf->fr_address -= stretch + growth; | |
d1c5f158 AM |
2960 | newf->relax_marker ^= 1; |
2961 | fragP->fr_next = newf; | |
2962 | #ifdef DEBUG | |
2963 | as_warn (_("padding added")); | |
2964 | #endif | |
2965 | } | |
252b5132 RH |
2966 | } |
2967 | break; | |
2968 | ||
2969 | case rs_org: | |
2970 | { | |
c39c821c | 2971 | offsetT target = offset; |
e46d99eb | 2972 | addressT after; |
252b5132 RH |
2973 | |
2974 | if (symbolP) | |
2975 | { | |
b4b24b79 AM |
2976 | /* Convert from an actual address to an octet offset |
2977 | into the section. Here it is assumed that the | |
2978 | section's VMA is zero, and can omit subtracting it | |
2979 | from the symbol's value to get the address offset. */ | |
2980 | know (S_GET_SEGMENT (symbolP)->vma == 0); | |
6e917903 | 2981 | target += S_GET_VALUE (symbolP) * OCTETS_PER_BYTE; |
ac62c346 | 2982 | } |
252b5132 RH |
2983 | |
2984 | know (fragP->fr_next); | |
6afe8e98 | 2985 | after = fragP->fr_next->fr_address + stretch; |
252b5132 | 2986 | growth = target - after; |
9875b365 MR |
2987 | |
2988 | /* Growth may be negative, but variable part of frag | |
2989 | cannot have fewer than 0 chars. That is, we can't | |
2990 | .org backwards. */ | |
c39c821c | 2991 | if ((offsetT) (address + fragP->fr_fix) > target) |
252b5132 | 2992 | { |
32638454 AM |
2993 | growth = 0; |
2994 | ||
2995 | /* Don't error on first few frag relax passes. | |
2996 | The symbol might be an expression involving | |
2997 | symbol values from other sections. If those | |
2998 | sections have not yet been processed their | |
2999 | frags will all have zero addresses, so we | |
3000 | will calculate incorrect values for them. The | |
3001 | number of passes we allow before giving an | |
3002 | error is somewhat arbitrary. It should be at | |
3003 | least one, with larger values requiring | |
3004 | increasingly contrived dependencies between | |
3005 | frags to trigger a false error. */ | |
3006 | if (pass < 2) | |
3007 | { | |
3008 | /* Force another pass. */ | |
3009 | ret = 1; | |
3010 | break; | |
3011 | } | |
3012 | ||
14ad458a | 3013 | as_bad_where (fragP->fr_file, fragP->fr_line, |
685736be | 3014 | _("attempt to move .org backwards")); |
14ad458a ILT |
3015 | |
3016 | /* We've issued an error message. Change the | |
b4b24b79 | 3017 | frag to avoid cascading errors. */ |
14ad458a ILT |
3018 | fragP->fr_type = rs_align; |
3019 | fragP->fr_subtype = 0; | |
3020 | fragP->fr_offset = 0; | |
6afe8e98 | 3021 | fragP->fr_fix = after - address; |
252b5132 | 3022 | } |
252b5132 | 3023 | } |
6afe8e98 | 3024 | break; |
252b5132 RH |
3025 | |
3026 | case rs_space: | |
62a02d25 | 3027 | case rs_space_nop: |
54d3cad9 | 3028 | growth = 0; |
252b5132 RH |
3029 | if (symbolP) |
3030 | { | |
766c03c9 AM |
3031 | offsetT amount; |
3032 | ||
3033 | amount = S_GET_VALUE (symbolP); | |
9e40345d | 3034 | if (S_GET_SEGMENT (symbolP) != absolute_section |
252b5132 RH |
3035 | || S_IS_COMMON (symbolP) |
3036 | || ! S_IS_DEFINED (symbolP)) | |
252b5132 | 3037 | { |
54d3cad9 | 3038 | as_bad_where (fragP->fr_file, fragP->fr_line, |
b1766e7c | 3039 | _(".space, .nops or .fill specifies non-absolute value")); |
54d3cad9 AM |
3040 | /* Prevent repeat of this error message. */ |
3041 | fragP->fr_symbol = 0; | |
3042 | } | |
3043 | else if (amount < 0) | |
3044 | { | |
32638454 AM |
3045 | /* Don't error on first few frag relax passes. |
3046 | See rs_org comment for a longer explanation. */ | |
3047 | if (pass < 2) | |
3048 | { | |
3049 | ret = 1; | |
3050 | break; | |
3051 | } | |
3052 | ||
54d3cad9 | 3053 | as_warn_where (fragP->fr_file, fragP->fr_line, |
8f065d3b | 3054 | _(".space, .nops or .fill with negative value, ignored")); |
766c03c9 | 3055 | fragP->fr_symbol = 0; |
252b5132 | 3056 | } |
54d3cad9 | 3057 | else |
050be34e | 3058 | growth = (was_address + fragP->fr_fix + amount |
54d3cad9 | 3059 | - fragP->fr_next->fr_address); |
252b5132 | 3060 | } |
252b5132 RH |
3061 | break; |
3062 | ||
3063 | case rs_machine_dependent: | |
3064 | #ifdef md_relax_frag | |
c842b53a | 3065 | growth = md_relax_frag (segment, fragP, stretch); |
252b5132 RH |
3066 | #else |
3067 | #ifdef TC_GENERIC_RELAX_TABLE | |
3068 | /* The default way to relax a frag is to look through | |
3069 | TC_GENERIC_RELAX_TABLE. */ | |
b65d68b8 L |
3070 | growth = md_generic_table_relax_frag (segment, fragP, |
3071 | stretch); | |
efaf0ba4 | 3072 | #endif /* TC_GENERIC_RELAX_TABLE */ |
252b5132 RH |
3073 | #endif |
3074 | break; | |
3075 | ||
3076 | case rs_leb128: | |
3077 | { | |
3078 | valueT value; | |
685736be | 3079 | offsetT size; |
252b5132 | 3080 | |
6386f3a7 | 3081 | value = resolve_symbol_value (fragP->fr_symbol); |
252b5132 RH |
3082 | size = sizeof_leb128 (value, fragP->fr_subtype); |
3083 | growth = size - fragP->fr_offset; | |
3084 | fragP->fr_offset = size; | |
3085 | } | |
3086 | break; | |
3087 | ||
3088 | case rs_cfa: | |
3089 | growth = eh_frame_relax_frag (fragP); | |
3090 | break; | |
3091 | ||
220e750f RH |
3092 | case rs_dwarf2dbg: |
3093 | growth = dwarf2dbg_relax_frag (fragP); | |
3094 | break; | |
3095 | ||
252b5132 RH |
3096 | default: |
3097 | BAD_CASE (fragP->fr_type); | |
3098 | break; | |
3099 | } | |
3100 | if (growth) | |
3101 | { | |
3102 | stretch += growth; | |
e46d99eb | 3103 | stretched = 1; |
d1c5f158 AM |
3104 | if (fragP->fr_type == rs_leb128) |
3105 | rs_leb128_fudge += 16; | |
3106 | else if (fragP->fr_type == rs_align | |
3107 | && (rs_leb128_fudge & 16) != 0 | |
3108 | && stretch == 0) | |
3109 | rs_leb128_fudge += 16; | |
3110 | else | |
3111 | rs_leb128_fudge = 0; | |
252b5132 | 3112 | } |
4111faa5 | 3113 | } |
d1c5f158 AM |
3114 | |
3115 | if (stretch == 0 | |
3116 | && (rs_leb128_fudge & 16) == 0 | |
3117 | && (rs_leb128_fudge & -16) != 0) | |
3118 | rs_leb128_fudge += 1; | |
3119 | else | |
3120 | rs_leb128_fudge = 0; | |
252b5132 | 3121 | } |
4111faa5 NC |
3122 | /* Until nothing further to relax. */ |
3123 | while (stretched && -- max_iterations); | |
3124 | ||
3125 | if (stretched) | |
3126 | as_fatal (_("Infinite loop encountered whilst attempting to compute the addresses of symbols in section %s"), | |
3127 | segment_name (segment)); | |
3128 | } | |
252b5132 | 3129 | |
e46d99eb AM |
3130 | for (fragP = segment_frag_root; fragP; fragP = fragP->fr_next) |
3131 | if (fragP->last_fr_address != fragP->fr_address) | |
3132 | { | |
3133 | fragP->last_fr_address = fragP->fr_address; | |
3134 | ret = 1; | |
3135 | } | |
3136 | return ret; | |
efaf0ba4 | 3137 | } |
252b5132 | 3138 | |
252b5132 | 3139 | void |
d7342424 | 3140 | number_to_chars_bigendian (char *buf, valueT val, int n) |
252b5132 | 3141 | { |
937149dd | 3142 | if (n <= 0) |
252b5132 RH |
3143 | abort (); |
3144 | while (n--) | |
3145 | { | |
3146 | buf[n] = val & 0xff; | |
3147 | val >>= 8; | |
3148 | } | |
3149 | } | |
3150 | ||
3151 | void | |
d7342424 | 3152 | number_to_chars_littleendian (char *buf, valueT val, int n) |
252b5132 | 3153 | { |
937149dd | 3154 | if (n <= 0) |
252b5132 RH |
3155 | abort (); |
3156 | while (n--) | |
3157 | { | |
3158 | *buf++ = val & 0xff; | |
3159 | val >>= 8; | |
3160 | } | |
3161 | } | |
3162 | ||
3163 | void | |
d7342424 | 3164 | write_print_statistics (FILE *file) |
252b5132 | 3165 | { |
6d4d30bb | 3166 | fprintf (file, "fixups: %d\n", n_fixups); |
252b5132 RH |
3167 | } |
3168 | ||
efaf0ba4 | 3169 | /* For debugging. */ |
252b5132 RH |
3170 | extern int indent_level; |
3171 | ||
3172 | void | |
d7342424 | 3173 | print_fixup (fixS *fixp) |
252b5132 RH |
3174 | { |
3175 | indent_level = 1; | |
d2df793a NC |
3176 | fprintf (stderr, "fix "); |
3177 | fprintf_vma (stderr, (bfd_vma)((bfd_hostptr_t) fixp)); | |
3178 | fprintf (stderr, " %s:%d",fixp->fx_file, fixp->fx_line); | |
252b5132 RH |
3179 | if (fixp->fx_pcrel) |
3180 | fprintf (stderr, " pcrel"); | |
3181 | if (fixp->fx_pcrel_adjust) | |
3182 | fprintf (stderr, " pcrel_adjust=%d", fixp->fx_pcrel_adjust); | |
252b5132 RH |
3183 | if (fixp->fx_tcbit) |
3184 | fprintf (stderr, " tcbit"); | |
3185 | if (fixp->fx_done) | |
3186 | fprintf (stderr, " done"); | |
d2df793a NC |
3187 | fprintf (stderr, "\n size=%d frag=", fixp->fx_size); |
3188 | fprintf_vma (stderr, (bfd_vma) ((bfd_hostptr_t) fixp->fx_frag)); | |
3189 | fprintf (stderr, " where=%ld offset=%lx addnumber=%lx", | |
3190 | (long) fixp->fx_where, | |
0af1713e AM |
3191 | (unsigned long) fixp->fx_offset, |
3192 | (unsigned long) fixp->fx_addnumber); | |
252b5132 RH |
3193 | fprintf (stderr, "\n %s (%d)", bfd_get_reloc_code_name (fixp->fx_r_type), |
3194 | fixp->fx_r_type); | |
252b5132 RH |
3195 | if (fixp->fx_addsy) |
3196 | { | |
3197 | fprintf (stderr, "\n +<"); | |
3198 | print_symbol_value_1 (stderr, fixp->fx_addsy); | |
3199 | fprintf (stderr, ">"); | |
3200 | } | |
3201 | if (fixp->fx_subsy) | |
3202 | { | |
3203 | fprintf (stderr, "\n -<"); | |
3204 | print_symbol_value_1 (stderr, fixp->fx_subsy); | |
3205 | fprintf (stderr, ">"); | |
3206 | } | |
3207 | fprintf (stderr, "\n"); | |
3208 | #ifdef TC_FIX_DATA_PRINT | |
3209 | TC_FIX_DATA_PRINT (stderr, fixp); | |
3210 | #endif | |
3211 | } |