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Commit | Line | Data |
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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 | |
9cce9fab | 72 | #define TC_VALIDATE_FIX_SUB(FIX, SEG) 0 |
252b5132 RH |
73 | #endif |
74 | ||
58a77e41 EC |
75 | #ifndef TC_LINKRELAX_FIXUP |
76 | #define TC_LINKRELAX_FIXUP(SEG) 1 | |
77 | #endif | |
78 | ||
a161fe53 AM |
79 | #ifndef MD_APPLY_SYM_VALUE |
80 | #define MD_APPLY_SYM_VALUE(FIX) 1 | |
8f36cd18 | 81 | #endif |
ef99799a | 82 | |
87548816 NC |
83 | #ifndef TC_FINALIZE_SYMS_BEFORE_SIZE_SEG |
84 | #define TC_FINALIZE_SYMS_BEFORE_SIZE_SEG 1 | |
85 | #endif | |
86 | ||
252b5132 | 87 | #ifndef MD_PCREL_FROM_SECTION |
df44284e | 88 | #define MD_PCREL_FROM_SECTION(FIX, SEC) md_pcrel_from (FIX) |
252b5132 RH |
89 | #endif |
90 | ||
c9cd7160 L |
91 | #ifndef TC_FAKE_LABEL |
92 | #define TC_FAKE_LABEL(NAME) (strcmp ((NAME), FAKE_LABEL_NAME) == 0) | |
93 | #endif | |
94 | ||
d31f0f6d AM |
95 | /* Positive values of TC_FX_SIZE_SLACK allow a target to define |
96 | fixups that far past the end of a frag. Having such fixups | |
97 | is of course most most likely a bug in setting fx_size correctly. | |
98 | A negative value disables the fixup check entirely, which is | |
99 | appropriate for something like the Renesas / SuperH SH_COUNT | |
100 | reloc. */ | |
101 | #ifndef TC_FX_SIZE_SLACK | |
102 | #define TC_FX_SIZE_SLACK(FIX) 0 | |
103 | #endif | |
104 | ||
6386f3a7 AM |
105 | /* Used to control final evaluation of expressions. */ |
106 | int finalize_syms = 0; | |
e46d99eb | 107 | |
252b5132 | 108 | int symbol_table_frozen; |
a161fe53 AM |
109 | |
110 | symbolS *abs_section_sym; | |
111 | ||
26346241 AM |
112 | /* Remember the value of dot when parsing expressions. */ |
113 | addressT dot_value; | |
114 | ||
8e723a10 CLT |
115 | /* The frag that dot_value is based from. */ |
116 | fragS *dot_frag; | |
117 | ||
05e9452c AM |
118 | /* Relocs generated by ".reloc" pseudo. */ |
119 | struct reloc_list* reloc_list; | |
120 | ||
d7342424 | 121 | void print_fixup (fixS *); |
252b5132 | 122 | |
252b5132 RH |
123 | /* We generally attach relocs to frag chains. However, after we have |
124 | chained these all together into a segment, any relocs we add after | |
125 | that must be attached to a segment. This will include relocs added | |
126 | in md_estimate_size_for_relax, for example. */ | |
127 | static int frags_chained = 0; | |
252b5132 RH |
128 | |
129 | static int n_fixups; | |
130 | ||
df44284e | 131 | #define RELOC_ENUM enum bfd_reloc_code_real |
df44284e | 132 | |
efaf0ba4 NC |
133 | /* Create a fixS in obstack 'notes'. */ |
134 | ||
252b5132 | 135 | static fixS * |
d7342424 | 136 | fix_new_internal (fragS *frag, /* Which frag? */ |
90bd3c90 AM |
137 | unsigned long where, /* Where in that frag? */ |
138 | unsigned long size, /* 1, 2, or 4 usually. */ | |
d7342424 KH |
139 | symbolS *add_symbol, /* X_add_symbol. */ |
140 | symbolS *sub_symbol, /* X_op_symbol. */ | |
141 | offsetT offset, /* X_add_number. */ | |
142 | int pcrel, /* TRUE if PC-relative relocation. */ | |
032fbb7a | 143 | RELOC_ENUM r_type /* Relocation type. */, |
c865e45b | 144 | int at_beginning) /* Add to the start of the list? */ |
252b5132 RH |
145 | { |
146 | fixS *fixP; | |
147 | ||
148 | n_fixups++; | |
149 | ||
1e9cc1c2 | 150 | fixP = (fixS *) obstack_alloc (¬es, sizeof (fixS)); |
252b5132 RH |
151 | |
152 | fixP->fx_frag = frag; | |
153 | fixP->fx_where = where; | |
154 | fixP->fx_size = size; | |
155 | /* We've made fx_size a narrow field; check that it's wide enough. */ | |
156 | if (fixP->fx_size != size) | |
157 | { | |
90bd3c90 | 158 | as_bad (_("field fx_size too small to hold %lu"), size); |
252b5132 RH |
159 | abort (); |
160 | } | |
161 | fixP->fx_addsy = add_symbol; | |
162 | fixP->fx_subsy = sub_symbol; | |
163 | fixP->fx_offset = offset; | |
26346241 | 164 | fixP->fx_dot_value = dot_value; |
8e723a10 | 165 | fixP->fx_dot_frag = dot_frag; |
252b5132 | 166 | fixP->fx_pcrel = pcrel; |
252b5132 | 167 | fixP->fx_r_type = r_type; |
252b5132 | 168 | fixP->fx_pcrel_adjust = 0; |
252b5132 RH |
169 | fixP->fx_addnumber = 0; |
170 | fixP->fx_tcbit = 0; | |
20ee54e8 | 171 | fixP->fx_tcbit2 = 0; |
252b5132 RH |
172 | fixP->fx_done = 0; |
173 | fixP->fx_no_overflow = 0; | |
174 | fixP->fx_signed = 0; | |
175 | ||
176 | #ifdef USING_CGEN | |
177 | fixP->fx_cgen.insn = NULL; | |
178 | fixP->fx_cgen.opinfo = 0; | |
179 | #endif | |
180 | ||
181 | #ifdef TC_FIX_TYPE | |
efaf0ba4 | 182 | TC_INIT_FIX_DATA (fixP); |
252b5132 RH |
183 | #endif |
184 | ||
3b4dbbbf | 185 | fixP->fx_file = as_where (&fixP->fx_line); |
252b5132 | 186 | |
252b5132 RH |
187 | { |
188 | ||
252b5132 RH |
189 | fixS **seg_fix_rootP = (frags_chained |
190 | ? &seg_info (now_seg)->fix_root | |
191 | : &frchain_now->fix_root); | |
192 | fixS **seg_fix_tailP = (frags_chained | |
193 | ? &seg_info (now_seg)->fix_tail | |
194 | : &frchain_now->fix_tail); | |
252b5132 | 195 | |
c865e45b RS |
196 | if (at_beginning) |
197 | { | |
198 | fixP->fx_next = *seg_fix_rootP; | |
199 | *seg_fix_rootP = fixP; | |
200 | if (fixP->fx_next == NULL) | |
201 | *seg_fix_tailP = fixP; | |
202 | } | |
252b5132 | 203 | else |
c865e45b RS |
204 | { |
205 | fixP->fx_next = NULL; | |
206 | if (*seg_fix_tailP) | |
207 | (*seg_fix_tailP)->fx_next = fixP; | |
208 | else | |
209 | *seg_fix_rootP = fixP; | |
210 | *seg_fix_tailP = fixP; | |
211 | } | |
252b5132 RH |
212 | } |
213 | ||
214 | return fixP; | |
215 | } | |
216 | ||
217 | /* Create a fixup relative to a symbol (plus a constant). */ | |
218 | ||
219 | fixS * | |
90bd3c90 AM |
220 | fix_new (fragS *frag, /* Which frag? */ |
221 | unsigned long where, /* Where in that frag? */ | |
222 | unsigned long size, /* 1, 2, or 4 usually. */ | |
223 | symbolS *add_symbol, /* X_add_symbol. */ | |
d7342424 KH |
224 | offsetT offset, /* X_add_number. */ |
225 | int pcrel, /* TRUE if PC-relative relocation. */ | |
226 | RELOC_ENUM r_type /* Relocation type. */) | |
252b5132 RH |
227 | { |
228 | return fix_new_internal (frag, where, size, add_symbol, | |
5b7c81bd | 229 | (symbolS *) NULL, offset, pcrel, r_type, false); |
252b5132 RH |
230 | } |
231 | ||
232 | /* Create a fixup for an expression. Currently we only support fixups | |
233 | for difference expressions. That is itself more than most object | |
234 | file formats support anyhow. */ | |
235 | ||
236 | fixS * | |
d7342424 | 237 | fix_new_exp (fragS *frag, /* Which frag? */ |
90bd3c90 AM |
238 | unsigned long where, /* Where in that frag? */ |
239 | unsigned long size, /* 1, 2, or 4 usually. */ | |
d7342424 KH |
240 | expressionS *exp, /* Expression. */ |
241 | int pcrel, /* TRUE if PC-relative relocation. */ | |
242 | RELOC_ENUM r_type /* Relocation type. */) | |
252b5132 RH |
243 | { |
244 | symbolS *add = NULL; | |
245 | symbolS *sub = NULL; | |
246 | offsetT off = 0; | |
247 | ||
248 | switch (exp->X_op) | |
249 | { | |
250 | case O_absent: | |
251 | break; | |
252 | ||
37006e43 NC |
253 | case O_register: |
254 | as_bad (_("register value used as expression")); | |
255 | break; | |
256 | ||
252b5132 RH |
257 | case O_add: |
258 | /* This comes up when _GLOBAL_OFFSET_TABLE_+(.-L0) is read, if | |
259 | the difference expression cannot immediately be reduced. */ | |
260 | { | |
261 | symbolS *stmp = make_expr_symbol (exp); | |
58a77e41 | 262 | |
252b5132 RH |
263 | exp->X_op = O_symbol; |
264 | exp->X_op_symbol = 0; | |
265 | exp->X_add_symbol = stmp; | |
266 | exp->X_add_number = 0; | |
58a77e41 | 267 | |
252b5132 RH |
268 | return fix_new_exp (frag, where, size, exp, pcrel, r_type); |
269 | } | |
270 | ||
271 | case O_symbol_rva: | |
272 | add = exp->X_add_symbol; | |
273 | off = exp->X_add_number; | |
252b5132 | 274 | r_type = BFD_RELOC_RVA; |
252b5132 RH |
275 | break; |
276 | ||
277 | case O_uminus: | |
278 | sub = exp->X_add_symbol; | |
279 | off = exp->X_add_number; | |
280 | break; | |
281 | ||
282 | case O_subtract: | |
283 | sub = exp->X_op_symbol; | |
284 | /* Fall through. */ | |
285 | case O_symbol: | |
286 | add = exp->X_add_symbol; | |
efaf0ba4 | 287 | /* Fall through. */ |
252b5132 RH |
288 | case O_constant: |
289 | off = exp->X_add_number; | |
290 | break; | |
291 | ||
292 | default: | |
293 | add = make_expr_symbol (exp); | |
294 | break; | |
295 | } | |
296 | ||
c865e45b | 297 | return fix_new_internal (frag, where, size, add, sub, off, pcrel, |
5b7c81bd | 298 | r_type, false); |
c865e45b RS |
299 | } |
300 | ||
301 | /* Create a fixup at the beginning of FRAG. The arguments are the same | |
302 | as for fix_new, except that WHERE is implicitly 0. */ | |
303 | ||
304 | fixS * | |
90bd3c90 | 305 | fix_at_start (fragS *frag, unsigned long size, symbolS *add_symbol, |
c865e45b RS |
306 | offsetT offset, int pcrel, RELOC_ENUM r_type) |
307 | { | |
308 | return fix_new_internal (frag, 0, size, add_symbol, | |
5b7c81bd | 309 | (symbolS *) NULL, offset, pcrel, r_type, true); |
252b5132 RH |
310 | } |
311 | ||
ae6063d4 AM |
312 | /* Generic function to determine whether a fixup requires a relocation. */ |
313 | int | |
d7342424 | 314 | generic_force_reloc (fixS *fix) |
ae6063d4 | 315 | { |
ae6063d4 AM |
316 | if (fix->fx_r_type == BFD_RELOC_VTABLE_INHERIT |
317 | || fix->fx_r_type == BFD_RELOC_VTABLE_ENTRY) | |
318 | return 1; | |
7be1c489 | 319 | |
61e192bf NC |
320 | if (fix->fx_addsy == NULL) |
321 | return 0; | |
322 | ||
ae6063d4 AM |
323 | return S_FORCE_RELOC (fix->fx_addsy, fix->fx_subsy == NULL); |
324 | } | |
325 | ||
252b5132 RH |
326 | /* Append a string onto another string, bumping the pointer along. */ |
327 | void | |
d7342424 | 328 | append (char **charPP, char *fromP, unsigned long length) |
252b5132 | 329 | { |
efaf0ba4 | 330 | /* Don't trust memcpy() of 0 chars. */ |
252b5132 RH |
331 | if (length == 0) |
332 | return; | |
333 | ||
334 | memcpy (*charPP, fromP, length); | |
335 | *charPP += length; | |
336 | } | |
337 | ||
efaf0ba4 NC |
338 | /* This routine records the largest alignment seen for each segment. |
339 | If the beginning of the segment is aligned on the worst-case | |
340 | boundary, all of the other alignments within it will work. At | |
341 | least one object format really uses this info. */ | |
342 | ||
252b5132 | 343 | void |
d7342424 KH |
344 | record_alignment (/* Segment to which alignment pertains. */ |
345 | segT seg, | |
346 | /* Alignment, as a power of 2 (e.g., 1 => 2-byte | |
347 | boundary, 2 => 4-byte boundary, etc.) */ | |
9136aa49 | 348 | unsigned int align) |
252b5132 RH |
349 | { |
350 | if (seg == absolute_section) | |
351 | return; | |
7be1c489 | 352 | |
fd361982 AM |
353 | if (align > bfd_section_alignment (seg)) |
354 | bfd_set_section_alignment (seg, align); | |
252b5132 RH |
355 | } |
356 | ||
0a9ef439 | 357 | int |
d7342424 | 358 | get_recorded_alignment (segT seg) |
0a9ef439 RH |
359 | { |
360 | if (seg == absolute_section) | |
361 | return 0; | |
7be1c489 | 362 | |
fd361982 | 363 | return bfd_section_alignment (seg); |
0a9ef439 RH |
364 | } |
365 | ||
252b5132 RH |
366 | /* Reset the section indices after removing the gas created sections. */ |
367 | ||
368 | static void | |
e7ff5c73 | 369 | renumber_sections (bfd *abfd ATTRIBUTE_UNUSED, asection *sec, void *countparg) |
252b5132 RH |
370 | { |
371 | int *countp = (int *) countparg; | |
372 | ||
373 | sec->index = *countp; | |
374 | ++*countp; | |
375 | } | |
376 | ||
252b5132 | 377 | static fragS * |
d7342424 | 378 | chain_frchains_together_1 (segT section, struct frchain *frchp) |
252b5132 RH |
379 | { |
380 | fragS dummy, *prev_frag = &dummy; | |
252b5132 | 381 | fixS fix_dummy, *prev_fix = &fix_dummy; |
252b5132 | 382 | |
c9049d30 | 383 | for (; frchp; frchp = frchp->frch_next) |
252b5132 RH |
384 | { |
385 | prev_frag->fr_next = frchp->frch_root; | |
386 | prev_frag = frchp->frch_last; | |
9c2799c2 | 387 | gas_assert (prev_frag->fr_type != 0); |
252b5132 RH |
388 | if (frchp->fix_root != (fixS *) NULL) |
389 | { | |
390 | if (seg_info (section)->fix_root == (fixS *) NULL) | |
391 | seg_info (section)->fix_root = frchp->fix_root; | |
392 | prev_fix->fx_next = frchp->fix_root; | |
393 | seg_info (section)->fix_tail = frchp->fix_tail; | |
394 | prev_fix = frchp->fix_tail; | |
395 | } | |
252b5132 | 396 | } |
4fc0b46e AM |
397 | gas_assert (prev_frag != &dummy |
398 | && prev_frag->fr_type != 0); | |
252b5132 RH |
399 | prev_frag->fr_next = 0; |
400 | return prev_frag; | |
401 | } | |
402 | ||
252b5132 | 403 | static void |
d7342424 KH |
404 | chain_frchains_together (bfd *abfd ATTRIBUTE_UNUSED, |
405 | segT section, | |
e7ff5c73 | 406 | void *xxx ATTRIBUTE_UNUSED) |
252b5132 RH |
407 | { |
408 | segment_info_type *info; | |
409 | ||
410 | /* BFD may have introduced its own sections without using | |
411 | subseg_new, so it is possible that seg_info is NULL. */ | |
412 | info = seg_info (section); | |
413 | if (info != (segment_info_type *) NULL) | |
efaf0ba4 NC |
414 | info->frchainP->frch_last |
415 | = chain_frchains_together_1 (section, info->frchainP); | |
252b5132 RH |
416 | |
417 | /* Now that we've chained the frags together, we must add new fixups | |
418 | to the segment, not to the frag chain. */ | |
419 | frags_chained = 1; | |
420 | } | |
421 | ||
252b5132 | 422 | static void |
d7342424 | 423 | cvt_frag_to_fill (segT sec ATTRIBUTE_UNUSED, fragS *fragP) |
252b5132 RH |
424 | { |
425 | switch (fragP->fr_type) | |
426 | { | |
62a02d25 L |
427 | case rs_space_nop: |
428 | goto skip_align; | |
252b5132 RH |
429 | case rs_align: |
430 | case rs_align_code: | |
0a9ef439 | 431 | case rs_align_test: |
252b5132 RH |
432 | case rs_org: |
433 | case rs_space: | |
434 | #ifdef HANDLE_ALIGN | |
435 | HANDLE_ALIGN (fragP); | |
436 | #endif | |
dc1e8a47 | 437 | skip_align: |
252b5132 RH |
438 | know (fragP->fr_next != NULL); |
439 | fragP->fr_offset = (fragP->fr_next->fr_address | |
440 | - fragP->fr_address | |
441 | - fragP->fr_fix) / fragP->fr_var; | |
442 | if (fragP->fr_offset < 0) | |
443 | { | |
14ad458a | 444 | as_bad_where (fragP->fr_file, fragP->fr_line, |
8f065d3b | 445 | _("attempt to .org/.space/.nops backwards? (%ld)"), |
14ad458a | 446 | (long) fragP->fr_offset); |
3f3cdb03 | 447 | fragP->fr_offset = 0; |
252b5132 | 448 | } |
62a02d25 L |
449 | if (fragP->fr_type == rs_space_nop) |
450 | fragP->fr_type = rs_fill_nop; | |
451 | else | |
452 | fragP->fr_type = rs_fill; | |
252b5132 RH |
453 | break; |
454 | ||
455 | case rs_fill: | |
62a02d25 | 456 | case rs_fill_nop: |
252b5132 RH |
457 | break; |
458 | ||
459 | case rs_leb128: | |
460 | { | |
461 | valueT value = S_GET_VALUE (fragP->fr_symbol); | |
462 | int size; | |
463 | ||
ba8826a8 AO |
464 | if (!S_IS_DEFINED (fragP->fr_symbol)) |
465 | { | |
466 | as_bad_where (fragP->fr_file, fragP->fr_line, | |
467 | _("leb128 operand is an undefined symbol: %s"), | |
468 | S_GET_NAME (fragP->fr_symbol)); | |
469 | } | |
470 | ||
252b5132 RH |
471 | size = output_leb128 (fragP->fr_literal + fragP->fr_fix, value, |
472 | fragP->fr_subtype); | |
473 | ||
474 | fragP->fr_fix += size; | |
475 | fragP->fr_type = rs_fill; | |
476 | fragP->fr_var = 0; | |
477 | fragP->fr_offset = 0; | |
478 | fragP->fr_symbol = NULL; | |
479 | } | |
480 | break; | |
481 | ||
482 | case rs_cfa: | |
483 | eh_frame_convert_frag (fragP); | |
484 | break; | |
485 | ||
220e750f RH |
486 | case rs_dwarf2dbg: |
487 | dwarf2dbg_convert_frag (fragP); | |
488 | break; | |
489 | ||
252b5132 | 490 | case rs_machine_dependent: |
252b5132 | 491 | md_convert_frag (stdoutput, sec, fragP); |
252b5132 | 492 | |
9c2799c2 | 493 | gas_assert (fragP->fr_next == NULL |
871a6bd2 AM |
494 | || (fragP->fr_next->fr_address - fragP->fr_address |
495 | == fragP->fr_fix)); | |
252b5132 | 496 | |
efaf0ba4 NC |
497 | /* After md_convert_frag, we make the frag into a ".space 0". |
498 | md_convert_frag() should set up any fixSs and constants | |
499 | required. */ | |
252b5132 RH |
500 | frag_wane (fragP); |
501 | break; | |
502 | ||
503 | #ifndef WORKING_DOT_WORD | |
504 | case rs_broken_word: | |
505 | { | |
506 | struct broken_word *lie; | |
507 | ||
508 | if (fragP->fr_subtype) | |
509 | { | |
510 | fragP->fr_fix += md_short_jump_size; | |
511 | for (lie = (struct broken_word *) (fragP->fr_symbol); | |
512 | lie && lie->dispfrag == fragP; | |
513 | lie = lie->next_broken_word) | |
514 | if (lie->added == 1) | |
515 | fragP->fr_fix += md_long_jump_size; | |
516 | } | |
517 | frag_wane (fragP); | |
518 | } | |
519 | break; | |
520 | #endif | |
521 | ||
522 | default: | |
523 | BAD_CASE (fragP->fr_type); | |
524 | break; | |
525 | } | |
09b935ac AM |
526 | #ifdef md_frag_check |
527 | md_frag_check (fragP); | |
528 | #endif | |
252b5132 RH |
529 | } |
530 | ||
32638454 AM |
531 | struct relax_seg_info |
532 | { | |
533 | int pass; | |
534 | int changed; | |
535 | }; | |
d7342424 | 536 | |
252b5132 | 537 | static void |
32638454 | 538 | relax_seg (bfd *abfd ATTRIBUTE_UNUSED, asection *sec, void *xxx) |
e46d99eb AM |
539 | { |
540 | segment_info_type *seginfo = seg_info (sec); | |
32638454 | 541 | struct relax_seg_info *info = (struct relax_seg_info *) xxx; |
e46d99eb AM |
542 | |
543 | if (seginfo && seginfo->frchainP | |
32638454 AM |
544 | && relax_segment (seginfo->frchainP->frch_root, sec, info->pass)) |
545 | info->changed = 1; | |
e46d99eb AM |
546 | } |
547 | ||
e46d99eb | 548 | static void |
fd361982 | 549 | size_seg (bfd *abfd ATTRIBUTE_UNUSED, asection *sec, void *xxx ATTRIBUTE_UNUSED) |
252b5132 RH |
550 | { |
551 | flagword flags; | |
552 | fragS *fragp; | |
553 | segment_info_type *seginfo; | |
554 | int x; | |
555 | valueT size, newsize; | |
556 | ||
557 | subseg_change (sec, 0); | |
558 | ||
252b5132 RH |
559 | seginfo = seg_info (sec); |
560 | if (seginfo && seginfo->frchainP) | |
561 | { | |
252b5132 RH |
562 | for (fragp = seginfo->frchainP->frch_root; fragp; fragp = fragp->fr_next) |
563 | cvt_frag_to_fill (sec, fragp); | |
564 | for (fragp = seginfo->frchainP->frch_root; | |
565 | fragp->fr_next; | |
566 | fragp = fragp->fr_next) | |
efaf0ba4 NC |
567 | /* Walk to last elt. */ |
568 | ; | |
252b5132 RH |
569 | size = fragp->fr_address + fragp->fr_fix; |
570 | } | |
571 | else | |
572 | size = 0; | |
573 | ||
fd361982 AM |
574 | flags = bfd_section_flags (sec); |
575 | if (size == 0 && bfd_section_size (sec) != 0 && | |
f3d2b04b KT |
576 | (flags & SEC_HAS_CONTENTS) != 0) |
577 | return; | |
e46d99eb | 578 | |
252b5132 RH |
579 | if (size > 0 && ! seginfo->bss) |
580 | flags |= SEC_HAS_CONTENTS; | |
581 | ||
e5435dec | 582 | flags &= ~SEC_RELOC; |
fd361982 | 583 | x = bfd_set_section_flags (sec, flags); |
9c2799c2 | 584 | gas_assert (x); |
252b5132 | 585 | |
2edb36e7 NC |
586 | /* If permitted, allow the backend to pad out the section |
587 | to some alignment boundary. */ | |
588 | if (do_not_pad_sections_to_alignment) | |
589 | newsize = size; | |
590 | else | |
591 | newsize = md_section_align (sec, size); | |
fd361982 | 592 | x = bfd_set_section_size (sec, newsize); |
9c2799c2 | 593 | gas_assert (x); |
252b5132 RH |
594 | |
595 | /* If the size had to be rounded up, add some padding in the last | |
596 | non-empty frag. */ | |
9c2799c2 | 597 | gas_assert (newsize >= size); |
252b5132 RH |
598 | if (size != newsize) |
599 | { | |
600 | fragS *last = seginfo->frchainP->frch_last; | |
601 | fragp = seginfo->frchainP->frch_root; | |
602 | while (fragp->fr_next != last) | |
603 | fragp = fragp->fr_next; | |
604 | last->fr_address = size; | |
18e1d487 AM |
605 | if ((newsize - size) % fragp->fr_var == 0) |
606 | fragp->fr_offset += (newsize - size) / fragp->fr_var; | |
607 | else | |
608 | /* If we hit this abort, it's likely due to subsegs_finish not | |
609 | providing sufficient alignment on the last frag, and the | |
610 | machine dependent code using alignment frags with fr_var | |
611 | greater than 1. */ | |
612 | abort (); | |
252b5132 RH |
613 | } |
614 | ||
615 | #ifdef tc_frob_section | |
616 | tc_frob_section (sec); | |
617 | #endif | |
618 | #ifdef obj_frob_section | |
619 | obj_frob_section (sec); | |
620 | #endif | |
621 | } | |
622 | ||
623 | #ifdef DEBUG2 | |
624 | static void | |
988392e2 | 625 | dump_section_relocs (bfd *abfd ATTRIBUTE_UNUSED, asection *sec, FILE *stream) |
252b5132 | 626 | { |
252b5132 RH |
627 | segment_info_type *seginfo = seg_info (sec); |
628 | fixS *fixp = seginfo->fix_root; | |
629 | ||
630 | if (!fixp) | |
631 | return; | |
632 | ||
633 | fprintf (stream, "sec %s relocs:\n", sec->name); | |
634 | while (fixp) | |
635 | { | |
636 | symbolS *s = fixp->fx_addsy; | |
e723ef7c ILT |
637 | |
638 | fprintf (stream, " %08lx: type %d ", (unsigned long) fixp, | |
639 | (int) fixp->fx_r_type); | |
640 | if (s == NULL) | |
641 | fprintf (stream, "no sym\n"); | |
642 | else | |
252b5132 | 643 | { |
e723ef7c ILT |
644 | print_symbol_value_1 (stream, s); |
645 | fprintf (stream, "\n"); | |
252b5132 | 646 | } |
252b5132 RH |
647 | fixp = fixp->fx_next; |
648 | } | |
649 | } | |
650 | #else | |
651 | #define dump_section_relocs(ABFD,SEC,STREAM) ((void) 0) | |
652 | #endif | |
653 | ||
654 | #ifndef EMIT_SECTION_SYMBOLS | |
655 | #define EMIT_SECTION_SYMBOLS 1 | |
656 | #endif | |
657 | ||
05e9452c AM |
658 | /* Resolve U.A.OFFSET_SYM and U.A.SYM fields of RELOC_LIST entries, |
659 | and check for validity. Convert RELOC_LIST from using U.A fields | |
660 | to U.B fields. */ | |
661 | static void | |
662 | resolve_reloc_expr_symbols (void) | |
663 | { | |
080f9e4f | 664 | bfd_vma addr_mask = 1; |
05e9452c AM |
665 | struct reloc_list *r; |
666 | ||
080f9e4f MR |
667 | /* Avoid a shift by the width of type. */ |
668 | addr_mask <<= bfd_arch_bits_per_address (stdoutput) - 1; | |
669 | addr_mask <<= 1; | |
670 | addr_mask -= 1; | |
671 | ||
05e9452c AM |
672 | for (r = reloc_list; r; r = r->next) |
673 | { | |
080f9e4f | 674 | reloc_howto_type *howto = r->u.a.howto; |
05e9452c AM |
675 | expressionS *symval; |
676 | symbolS *sym; | |
677 | bfd_vma offset, addend; | |
678 | asection *sec; | |
05e9452c AM |
679 | |
680 | resolve_symbol_value (r->u.a.offset_sym); | |
681 | symval = symbol_get_value_expression (r->u.a.offset_sym); | |
682 | ||
683 | offset = 0; | |
684 | sym = NULL; | |
685 | if (symval->X_op == O_constant) | |
686 | sym = r->u.a.offset_sym; | |
687 | else if (symval->X_op == O_symbol) | |
688 | { | |
689 | sym = symval->X_add_symbol; | |
690 | offset = symval->X_add_number; | |
691 | symval = symbol_get_value_expression (symval->X_add_symbol); | |
692 | } | |
693 | if (sym == NULL | |
694 | || symval->X_op != O_constant | |
695 | || (sec = S_GET_SEGMENT (sym)) == NULL | |
696 | || !SEG_NORMAL (sec)) | |
697 | { | |
698 | as_bad_where (r->file, r->line, _("invalid offset expression")); | |
699 | sec = NULL; | |
700 | } | |
701 | else | |
702 | offset += S_GET_VALUE (sym); | |
703 | ||
704 | sym = NULL; | |
705 | addend = r->u.a.addend; | |
706 | if (r->u.a.sym != NULL) | |
707 | { | |
708 | resolve_symbol_value (r->u.a.sym); | |
709 | symval = symbol_get_value_expression (r->u.a.sym); | |
710 | if (symval->X_op == O_constant) | |
711 | sym = r->u.a.sym; | |
712 | else if (symval->X_op == O_symbol) | |
713 | { | |
714 | sym = symval->X_add_symbol; | |
715 | addend += symval->X_add_number; | |
716 | symval = symbol_get_value_expression (symval->X_add_symbol); | |
717 | } | |
718 | if (symval->X_op != O_constant) | |
719 | { | |
720 | as_bad_where (r->file, r->line, _("invalid reloc expression")); | |
721 | sec = NULL; | |
722 | } | |
2578f2f3 | 723 | else if (sym != NULL && sec != NULL) |
7230378d | 724 | { |
080f9e4f MR |
725 | /* Convert relocs against local symbols to refer to the |
726 | corresponding section symbol plus offset instead. Keep | |
727 | PC-relative relocs of the REL variety intact though to | |
728 | prevent the offset from overflowing the relocated field, | |
729 | unless it has enough bits to cover the whole address | |
730 | space. */ | |
68fcee4f AM |
731 | if (S_IS_LOCAL (sym) |
732 | && S_IS_DEFINED (sym) | |
733 | && !symbol_section_p (sym) | |
d6101ac2 MR |
734 | && (sec->use_rela_p |
735 | || (howto->partial_inplace | |
736 | && (!howto->pc_relative | |
737 | || howto->src_mask == addr_mask)))) | |
7230378d AM |
738 | { |
739 | asection *symsec = S_GET_SEGMENT (sym); | |
740 | if (!(((symsec->flags & SEC_MERGE) != 0 | |
741 | && addend != 0) | |
742 | || (symsec->flags & SEC_THREAD_LOCAL) != 0)) | |
743 | { | |
744 | addend += S_GET_VALUE (sym); | |
745 | sym = section_symbol (symsec); | |
746 | } | |
747 | } | |
748 | symbol_mark_used_in_reloc (sym); | |
749 | } | |
05e9452c AM |
750 | } |
751 | if (sym == NULL) | |
752 | { | |
753 | if (abs_section_sym == NULL) | |
754 | abs_section_sym = section_symbol (absolute_section); | |
755 | sym = abs_section_sym; | |
756 | } | |
757 | ||
05e9452c AM |
758 | r->u.b.sec = sec; |
759 | r->u.b.s = symbol_get_bfdsym (sym); | |
760 | r->u.b.r.sym_ptr_ptr = &r->u.b.s; | |
761 | r->u.b.r.address = offset; | |
762 | r->u.b.r.addend = addend; | |
763 | r->u.b.r.howto = howto; | |
764 | } | |
765 | } | |
766 | ||
df44284e AM |
767 | /* This pass over fixups decides whether symbols can be replaced with |
768 | section symbols. */ | |
769 | ||
252b5132 | 770 | static void |
d7342424 KH |
771 | adjust_reloc_syms (bfd *abfd ATTRIBUTE_UNUSED, |
772 | asection *sec, | |
e7ff5c73 | 773 | void *xxx ATTRIBUTE_UNUSED) |
252b5132 RH |
774 | { |
775 | segment_info_type *seginfo = seg_info (sec); | |
776 | fixS *fixp; | |
777 | ||
778 | if (seginfo == NULL) | |
779 | return; | |
780 | ||
781 | dump_section_relocs (abfd, sec, stderr); | |
782 | ||
783 | for (fixp = seginfo->fix_root; fixp; fixp = fixp->fx_next) | |
784 | if (fixp->fx_done) | |
efaf0ba4 NC |
785 | /* Ignore it. */ |
786 | ; | |
252b5132 RH |
787 | else if (fixp->fx_addsy) |
788 | { | |
789 | symbolS *sym; | |
790 | asection *symsec; | |
791 | ||
792 | #ifdef DEBUG5 | |
793 | fprintf (stderr, "\n\nadjusting fixup:\n"); | |
794 | print_fixup (fixp); | |
795 | #endif | |
796 | ||
797 | sym = fixp->fx_addsy; | |
798 | ||
799 | /* All symbols should have already been resolved at this | |
800 | point. It is possible to see unresolved expression | |
801 | symbols, though, since they are not in the regular symbol | |
802 | table. */ | |
df44284e | 803 | resolve_symbol_value (sym); |
efaf0ba4 | 804 | |
49309057 | 805 | if (fixp->fx_subsy != NULL) |
6386f3a7 | 806 | resolve_symbol_value (fixp->fx_subsy); |
252b5132 | 807 | |
60938e80 L |
808 | /* If this symbol is equated to an undefined or common symbol, |
809 | convert the fixup to being against that symbol. */ | |
b4b24b79 AM |
810 | while (symbol_equated_reloc_p (sym) |
811 | || S_IS_WEAKREFR (sym)) | |
252b5132 | 812 | { |
b4b24b79 AM |
813 | symbolS *newsym = symbol_get_value_expression (sym)->X_add_symbol; |
814 | if (sym == newsym) | |
815 | break; | |
49309057 | 816 | fixp->fx_offset += symbol_get_value_expression (sym)->X_add_number; |
b4b24b79 AM |
817 | fixp->fx_addsy = newsym; |
818 | sym = newsym; | |
252b5132 RH |
819 | } |
820 | ||
df44284e | 821 | if (symbol_mri_common_p (sym)) |
252b5132 | 822 | { |
b4b24b79 AM |
823 | fixp->fx_offset += S_GET_VALUE (sym); |
824 | fixp->fx_addsy = symbol_get_value_expression (sym)->X_add_symbol; | |
df44284e | 825 | continue; |
252b5132 RH |
826 | } |
827 | ||
a161fe53 AM |
828 | /* If the symbol is undefined, common, weak, or global (ELF |
829 | shared libs), we can't replace it with the section symbol. */ | |
ae6063d4 | 830 | if (S_FORCE_RELOC (fixp->fx_addsy, 1)) |
a161fe53 AM |
831 | continue; |
832 | ||
833 | /* Is there some other (target cpu dependent) reason we can't adjust | |
834 | this one? (E.g. relocations involving function addresses on | |
835 | the PA. */ | |
836 | #ifdef tc_fix_adjustable | |
837 | if (! tc_fix_adjustable (fixp)) | |
838 | continue; | |
839 | #endif | |
840 | ||
841 | /* Since we're reducing to section symbols, don't attempt to reduce | |
842 | anything that's already using one. */ | |
843 | if (symbol_section_p (sym)) | |
d1bcae83 L |
844 | { |
845 | /* Mark the section symbol used in relocation so that it will | |
846 | be included in the symbol table. */ | |
847 | symbol_mark_used_in_reloc (sym); | |
848 | continue; | |
849 | } | |
a161fe53 | 850 | |
252b5132 | 851 | symsec = S_GET_SEGMENT (sym); |
252b5132 RH |
852 | if (symsec == NULL) |
853 | abort (); | |
efaf0ba4 | 854 | |
a841bdf5 AM |
855 | if (bfd_is_abs_section (symsec) |
856 | || symsec == reg_section) | |
252b5132 | 857 | { |
a161fe53 | 858 | /* The fixup_segment routine normally will not use this |
b4b24b79 | 859 | symbol in a relocation. */ |
df44284e | 860 | continue; |
252b5132 RH |
861 | } |
862 | ||
7565ed77 | 863 | /* Don't try to reduce relocs which refer to non-local symbols |
b4b24b79 AM |
864 | in .linkonce sections. It can lead to confusion when a |
865 | debugging section refers to a .linkonce section. I hope | |
866 | this will always be correct. */ | |
7565ed77 | 867 | if (symsec != sec && ! S_IS_LOCAL (sym)) |
252b5132 | 868 | { |
a161fe53 AM |
869 | if ((symsec->flags & SEC_LINK_ONCE) != 0 |
870 | || (IS_ELF | |
871 | /* The GNU toolchain uses an extension for ELF: a | |
872 | section beginning with the magic string | |
873 | .gnu.linkonce is a linkonce section. */ | |
d34049e8 | 874 | && startswith (segment_name (symsec), ".gnu.linkonce"))) |
a161fe53 | 875 | continue; |
252b5132 | 876 | } |
f7460f5f JJ |
877 | |
878 | /* Never adjust a reloc against local symbol in a merge section | |
879 | with non-zero addend. */ | |
5045ec7a AM |
880 | if ((symsec->flags & SEC_MERGE) != 0 |
881 | && (fixp->fx_offset != 0 || fixp->fx_subsy != NULL)) | |
a161fe53 | 882 | continue; |
13ae64f3 JJ |
883 | |
884 | /* Never adjust a reloc against TLS local symbol. */ | |
df44284e | 885 | if ((symsec->flags & SEC_THREAD_LOCAL) != 0) |
a161fe53 | 886 | continue; |
252b5132 | 887 | |
a161fe53 | 888 | /* We refetch the segment when calling section_symbol, rather |
252b5132 | 889 | than using symsec, because S_GET_VALUE may wind up changing |
efaf0ba4 | 890 | the section when it calls resolve_symbol_value. */ |
252b5132 RH |
891 | fixp->fx_offset += S_GET_VALUE (sym); |
892 | fixp->fx_addsy = section_symbol (S_GET_SEGMENT (sym)); | |
e723ef7c ILT |
893 | #ifdef DEBUG5 |
894 | fprintf (stderr, "\nadjusted fixup:\n"); | |
895 | print_fixup (fixp); | |
896 | #endif | |
252b5132 | 897 | } |
252b5132 RH |
898 | |
899 | dump_section_relocs (abfd, sec, stderr); | |
900 | } | |
901 | ||
e7ff5c73 AM |
902 | /* fixup_segment() |
903 | ||
904 | Go through all the fixS's in a segment and see which ones can be | |
905 | handled now. (These consist of fixS where we have since discovered | |
906 | the value of a symbol, or the address of the frag involved.) | |
907 | For each one, call md_apply_fix to put the fix into the frag data. | |
89d67ed9 AM |
908 | Ones that we couldn't completely handle here will be output later |
909 | by emit_relocations. */ | |
e7ff5c73 | 910 | |
89d67ed9 | 911 | static void |
e7ff5c73 AM |
912 | fixup_segment (fixS *fixP, segT this_segment) |
913 | { | |
e7ff5c73 AM |
914 | valueT add_number; |
915 | fragS *fragP; | |
e7ff5c73 AM |
916 | |
917 | if (fixP != NULL && abs_section_sym == NULL) | |
918 | abs_section_sym = section_symbol (absolute_section); | |
919 | ||
920 | /* If the linker is doing the relaxing, we must not do any fixups. | |
921 | ||
922 | Well, strictly speaking that's not true -- we could do any that | |
a8eb42a8 | 923 | are PC-relative and don't cross regions that could change size. */ |
e7ff5c73 AM |
924 | if (linkrelax && TC_LINKRELAX_FIXUP (this_segment)) |
925 | { | |
926 | for (; fixP; fixP = fixP->fx_next) | |
927 | if (!fixP->fx_done) | |
928 | { | |
929 | if (fixP->fx_addsy == NULL) | |
930 | { | |
931 | /* There was no symbol required by this relocation. | |
932 | However, BFD doesn't really handle relocations | |
933 | without symbols well. So fake up a local symbol in | |
934 | the absolute section. */ | |
935 | fixP->fx_addsy = abs_section_sym; | |
936 | } | |
937 | symbol_mark_used_in_reloc (fixP->fx_addsy); | |
938 | if (fixP->fx_subsy != NULL) | |
939 | symbol_mark_used_in_reloc (fixP->fx_subsy); | |
e7ff5c73 | 940 | } |
89d67ed9 | 941 | return; |
e7ff5c73 AM |
942 | } |
943 | ||
944 | for (; fixP; fixP = fixP->fx_next) | |
945 | { | |
da0835ae JB |
946 | segT add_symbol_segment = absolute_section; |
947 | ||
e7ff5c73 AM |
948 | #ifdef DEBUG5 |
949 | fprintf (stderr, "\nprocessing fixup:\n"); | |
950 | print_fixup (fixP); | |
951 | #endif | |
952 | ||
953 | fragP = fixP->fx_frag; | |
954 | know (fragP); | |
955 | #ifdef TC_VALIDATE_FIX | |
956 | TC_VALIDATE_FIX (fixP, this_segment, skip); | |
957 | #endif | |
958 | add_number = fixP->fx_offset; | |
959 | ||
e7ff5c73 AM |
960 | if (fixP->fx_addsy != NULL) |
961 | add_symbol_segment = S_GET_SEGMENT (fixP->fx_addsy); | |
962 | ||
963 | if (fixP->fx_subsy != NULL) | |
964 | { | |
965 | segT sub_symbol_segment; | |
966 | resolve_symbol_value (fixP->fx_subsy); | |
967 | sub_symbol_segment = S_GET_SEGMENT (fixP->fx_subsy); | |
968 | if (fixP->fx_addsy != NULL | |
969 | && sub_symbol_segment == add_symbol_segment | |
c969da64 RS |
970 | && !S_FORCE_RELOC (fixP->fx_addsy, 0) |
971 | && !S_FORCE_RELOC (fixP->fx_subsy, 0) | |
e7ff5c73 AM |
972 | && !TC_FORCE_RELOCATION_SUB_SAME (fixP, add_symbol_segment)) |
973 | { | |
974 | add_number += S_GET_VALUE (fixP->fx_addsy); | |
975 | add_number -= S_GET_VALUE (fixP->fx_subsy); | |
976 | fixP->fx_offset = add_number; | |
977 | fixP->fx_addsy = NULL; | |
978 | fixP->fx_subsy = NULL; | |
979 | #ifdef TC_M68K | |
980 | /* See the comment below about 68k weirdness. */ | |
981 | fixP->fx_pcrel = 0; | |
982 | #endif | |
983 | } | |
984 | else if (sub_symbol_segment == absolute_section | |
c969da64 | 985 | && !S_FORCE_RELOC (fixP->fx_subsy, 0) |
9a97a5d7 | 986 | && !TC_FORCE_RELOCATION_SUB_ABS (fixP, add_symbol_segment)) |
e7ff5c73 AM |
987 | { |
988 | add_number -= S_GET_VALUE (fixP->fx_subsy); | |
989 | fixP->fx_offset = add_number; | |
990 | fixP->fx_subsy = NULL; | |
991 | } | |
992 | else if (sub_symbol_segment == this_segment | |
c969da64 | 993 | && !S_FORCE_RELOC (fixP->fx_subsy, 0) |
5db484ff | 994 | && !TC_FORCE_RELOCATION_SUB_LOCAL (fixP, add_symbol_segment)) |
e7ff5c73 AM |
995 | { |
996 | add_number -= S_GET_VALUE (fixP->fx_subsy); | |
997 | fixP->fx_offset = (add_number + fixP->fx_dot_value | |
8e723a10 | 998 | + fixP->fx_dot_frag->fr_address); |
e7ff5c73 AM |
999 | |
1000 | /* Make it pc-relative. If the back-end code has not | |
1001 | selected a pc-relative reloc, cancel the adjustment | |
1002 | we do later on all pc-relative relocs. */ | |
1003 | if (0 | |
1004 | #ifdef TC_M68K | |
1005 | /* Do this for m68k even if it's already described | |
1006 | as pc-relative. On the m68k, an operand of | |
1007 | "pc@(foo-.-2)" should address "foo" in a | |
1008 | pc-relative mode. */ | |
1009 | || 1 | |
1010 | #endif | |
1011 | || !fixP->fx_pcrel) | |
1012 | add_number += MD_PCREL_FROM_SECTION (fixP, this_segment); | |
1013 | fixP->fx_subsy = NULL; | |
1014 | fixP->fx_pcrel = 1; | |
1015 | } | |
586ec8c1 | 1016 | else if (!TC_VALIDATE_FIX_SUB (fixP, add_symbol_segment)) |
e7ff5c73 | 1017 | { |
9a97a5d7 AM |
1018 | if (!md_register_arithmetic |
1019 | && (add_symbol_segment == reg_section | |
1020 | || sub_symbol_segment == reg_section)) | |
1021 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
1022 | _("register value used as expression")); | |
1023 | else | |
1024 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
1025 | _("can't resolve `%s' {%s section} - `%s' {%s section}"), | |
1026 | fixP->fx_addsy ? S_GET_NAME (fixP->fx_addsy) : "0", | |
1027 | segment_name (add_symbol_segment), | |
1028 | S_GET_NAME (fixP->fx_subsy), | |
1029 | segment_name (sub_symbol_segment)); | |
e7ff5c73 | 1030 | } |
586ec8c1 NC |
1031 | else if (sub_symbol_segment != undefined_section |
1032 | && ! bfd_is_com_section (sub_symbol_segment) | |
1033 | && MD_APPLY_SYM_VALUE (fixP)) | |
1034 | add_number -= S_GET_VALUE (fixP->fx_subsy); | |
e7ff5c73 AM |
1035 | } |
1036 | ||
1037 | if (fixP->fx_addsy) | |
1038 | { | |
1fc5d88e | 1039 | if (add_symbol_segment == this_segment |
c969da64 | 1040 | && !S_FORCE_RELOC (fixP->fx_addsy, 0) |
e7ff5c73 AM |
1041 | && !TC_FORCE_RELOCATION_LOCAL (fixP)) |
1042 | { | |
1043 | /* This fixup was made when the symbol's segment was | |
1044 | SEG_UNKNOWN, but it is now in the local segment. | |
1045 | So we know how to do the address without relocation. */ | |
1046 | add_number += S_GET_VALUE (fixP->fx_addsy); | |
1047 | fixP->fx_offset = add_number; | |
1048 | if (fixP->fx_pcrel) | |
1049 | add_number -= MD_PCREL_FROM_SECTION (fixP, this_segment); | |
1050 | fixP->fx_addsy = NULL; | |
1051 | fixP->fx_pcrel = 0; | |
1052 | } | |
1053 | else if (add_symbol_segment == absolute_section | |
c969da64 | 1054 | && !S_FORCE_RELOC (fixP->fx_addsy, 0) |
e7ff5c73 AM |
1055 | && !TC_FORCE_RELOCATION_ABS (fixP)) |
1056 | { | |
1057 | add_number += S_GET_VALUE (fixP->fx_addsy); | |
1058 | fixP->fx_offset = add_number; | |
1059 | fixP->fx_addsy = NULL; | |
1060 | } | |
1061 | else if (add_symbol_segment != undefined_section | |
1062 | && ! bfd_is_com_section (add_symbol_segment) | |
1063 | && MD_APPLY_SYM_VALUE (fixP)) | |
1064 | add_number += S_GET_VALUE (fixP->fx_addsy); | |
1065 | } | |
1066 | ||
1067 | if (fixP->fx_pcrel) | |
1068 | { | |
1069 | add_number -= MD_PCREL_FROM_SECTION (fixP, this_segment); | |
1070 | if (!fixP->fx_done && fixP->fx_addsy == NULL) | |
1071 | { | |
1072 | /* There was no symbol required by this relocation. | |
1073 | However, BFD doesn't really handle relocations | |
1074 | without symbols well. So fake up a local symbol in | |
1075 | the absolute section. */ | |
1076 | fixP->fx_addsy = abs_section_sym; | |
1077 | } | |
1078 | } | |
1079 | ||
1080 | if (!fixP->fx_done) | |
1081 | md_apply_fix (fixP, &add_number, this_segment); | |
1082 | ||
1083 | if (!fixP->fx_done) | |
1084 | { | |
e7ff5c73 AM |
1085 | if (fixP->fx_addsy == NULL) |
1086 | fixP->fx_addsy = abs_section_sym; | |
1087 | symbol_mark_used_in_reloc (fixP->fx_addsy); | |
1088 | if (fixP->fx_subsy != NULL) | |
1089 | symbol_mark_used_in_reloc (fixP->fx_subsy); | |
1090 | } | |
1091 | ||
5bc11336 | 1092 | if (!fixP->fx_no_overflow && fixP->fx_size != 0) |
e7ff5c73 AM |
1093 | { |
1094 | if (fixP->fx_size < sizeof (valueT)) | |
1095 | { | |
1096 | valueT mask; | |
1097 | ||
1098 | mask = 0; | |
1099 | mask--; /* Set all bits to one. */ | |
1100 | mask <<= fixP->fx_size * 8 - (fixP->fx_signed ? 1 : 0); | |
4504a634 JB |
1101 | if ((add_number & mask) != 0 |
1102 | && (fixP->fx_signed | |
1103 | ? (add_number & mask) != mask | |
1104 | : (-add_number & mask) != 0)) | |
e7ff5c73 AM |
1105 | { |
1106 | char buf[50], buf2[50]; | |
9a8041fd | 1107 | bfd_sprintf_vma (stdoutput, buf, fragP->fr_address + fixP->fx_where); |
e7ff5c73 | 1108 | if (add_number > 1000) |
9a8041fd | 1109 | bfd_sprintf_vma (stdoutput, buf2, add_number); |
e7ff5c73 AM |
1110 | else |
1111 | sprintf (buf2, "%ld", (long) add_number); | |
1112 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
992a06ee AM |
1113 | ngettext ("value of %s too large for field " |
1114 | "of %d byte at %s", | |
1115 | "value of %s too large for field " | |
1116 | "of %d bytes at %s", | |
1117 | fixP->fx_size), | |
e7ff5c73 AM |
1118 | buf2, fixP->fx_size, buf); |
1119 | } /* Generic error checking. */ | |
1120 | } | |
1121 | #ifdef WARN_SIGNED_OVERFLOW_WORD | |
1122 | /* Warn if a .word value is too large when treated as a signed | |
1123 | number. We already know it is not too negative. This is to | |
1124 | catch over-large switches generated by gcc on the 68k. */ | |
1125 | if (!flag_signed_overflow_ok | |
1126 | && fixP->fx_size == 2 | |
1127 | && add_number > 0x7fff) | |
1128 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
1129 | _("signed .word overflow; switch may be too large; %ld at 0x%lx"), | |
1130 | (long) add_number, | |
1131 | (long) (fragP->fr_address + fixP->fx_where)); | |
1132 | #endif | |
5bc11336 | 1133 | } |
e7ff5c73 AM |
1134 | |
1135 | #ifdef TC_VALIDATE_FIX | |
1136 | skip: ATTRIBUTE_UNUSED_LABEL | |
1137 | ; | |
1138 | #endif | |
1139 | #ifdef DEBUG5 | |
1140 | fprintf (stderr, "result:\n"); | |
1141 | print_fixup (fixP); | |
1142 | #endif | |
1143 | } /* For each fixS in this segment. */ | |
e7ff5c73 AM |
1144 | } |
1145 | ||
a161fe53 | 1146 | static void |
d7342424 KH |
1147 | fix_segment (bfd *abfd ATTRIBUTE_UNUSED, |
1148 | asection *sec, | |
e7ff5c73 | 1149 | void *xxx ATTRIBUTE_UNUSED) |
a161fe53 AM |
1150 | { |
1151 | segment_info_type *seginfo = seg_info (sec); | |
1152 | ||
1153 | fixup_segment (seginfo->fix_root, sec); | |
1154 | } | |
1155 | ||
e5435dec AM |
1156 | static void |
1157 | install_reloc (asection *sec, arelent *reloc, fragS *fragp, | |
3b4dbbbf | 1158 | const char *file, unsigned int line) |
e5435dec AM |
1159 | { |
1160 | char *err; | |
1161 | bfd_reloc_status_type s; | |
76d12939 AM |
1162 | asymbol *sym; |
1163 | ||
1164 | if (reloc->sym_ptr_ptr != NULL | |
1165 | && (sym = *reloc->sym_ptr_ptr) != NULL | |
1166 | && (sym->flags & BSF_KEEP) == 0 | |
1167 | && ((sym->flags & BSF_SECTION_SYM) == 0 | |
55f8b826 AM |
1168 | || (EMIT_SECTION_SYMBOLS |
1169 | && !bfd_is_abs_section (sym->section)))) | |
76d12939 | 1170 | as_bad_where (file, line, _("redefined symbol cannot be used on reloc")); |
e5435dec AM |
1171 | |
1172 | s = bfd_install_relocation (stdoutput, reloc, | |
1173 | fragp->fr_literal, fragp->fr_address, | |
1174 | sec, &err); | |
1175 | switch (s) | |
1176 | { | |
1177 | case bfd_reloc_ok: | |
1178 | break; | |
1179 | case bfd_reloc_overflow: | |
1180 | as_bad_where (file, line, _("relocation overflow")); | |
1181 | break; | |
1182 | case bfd_reloc_outofrange: | |
1183 | as_bad_where (file, line, _("relocation out of range")); | |
1184 | break; | |
1185 | default: | |
1186 | as_fatal (_("%s:%u: bad return from bfd_install_relocation: %x"), | |
1187 | file, line, s); | |
1188 | } | |
1189 | } | |
1190 | ||
7230378d AM |
1191 | static fragS * |
1192 | get_frag_for_reloc (fragS *last_frag, | |
1193 | const segment_info_type *seginfo, | |
1194 | const struct reloc_list *r) | |
1195 | { | |
1196 | fragS *f; | |
34bca508 | 1197 | |
7230378d AM |
1198 | for (f = last_frag; f != NULL; f = f->fr_next) |
1199 | if (f->fr_address <= r->u.b.r.address | |
1200 | && r->u.b.r.address < f->fr_address + f->fr_fix) | |
1201 | return f; | |
1202 | ||
1203 | for (f = seginfo->frchainP->frch_root; f != NULL; f = f->fr_next) | |
1204 | if (f->fr_address <= r->u.b.r.address | |
1205 | && r->u.b.r.address < f->fr_address + f->fr_fix) | |
1206 | return f; | |
1207 | ||
740bdc67 AM |
1208 | for (f = seginfo->frchainP->frch_root; f != NULL; f = f->fr_next) |
1209 | if (f->fr_address <= r->u.b.r.address | |
1210 | && r->u.b.r.address <= f->fr_address + f->fr_fix) | |
1211 | return f; | |
1212 | ||
7230378d AM |
1213 | as_bad_where (r->file, r->line, |
1214 | _("reloc not within (fixed part of) section")); | |
1215 | return NULL; | |
1216 | } | |
1217 | ||
252b5132 | 1218 | static void |
fd361982 AM |
1219 | write_relocs (bfd *abfd ATTRIBUTE_UNUSED, asection *sec, |
1220 | void *xxx ATTRIBUTE_UNUSED) | |
252b5132 RH |
1221 | { |
1222 | segment_info_type *seginfo = seg_info (sec); | |
252b5132 | 1223 | unsigned int n; |
05e9452c | 1224 | struct reloc_list *my_reloc_list, **rp, *r; |
252b5132 RH |
1225 | arelent **relocs; |
1226 | fixS *fixp; | |
7230378d | 1227 | fragS *last_frag; |
252b5132 RH |
1228 | |
1229 | /* If seginfo is NULL, we did not create this section; don't do | |
1230 | anything with it. */ | |
1231 | if (seginfo == NULL) | |
1232 | return; | |
1233 | ||
252b5132 RH |
1234 | n = 0; |
1235 | for (fixp = seginfo->fix_root; fixp; fixp = fixp->fx_next) | |
e5435dec AM |
1236 | if (!fixp->fx_done) |
1237 | n++; | |
1238 | ||
1239 | #ifdef RELOC_EXPANSION_POSSIBLE | |
1240 | n *= MAX_RELOC_EXPANSION; | |
1241 | #endif | |
252b5132 | 1242 | |
05e9452c AM |
1243 | /* Extract relocs for this section from reloc_list. */ |
1244 | rp = &reloc_list; | |
269b4ded | 1245 | |
05e9452c AM |
1246 | my_reloc_list = NULL; |
1247 | while ((r = *rp) != NULL) | |
1248 | { | |
1249 | if (r->u.b.sec == sec) | |
1250 | { | |
1251 | *rp = r->next; | |
1252 | r->next = my_reloc_list; | |
1253 | my_reloc_list = r; | |
1254 | n++; | |
1255 | } | |
1256 | else | |
1257 | rp = &r->next; | |
1258 | } | |
1259 | ||
add39d23 | 1260 | relocs = XCNEWVEC (arelent *, n); |
252b5132 | 1261 | |
7230378d AM |
1262 | n = 0; |
1263 | r = my_reloc_list; | |
1264 | last_frag = NULL; | |
252b5132 RH |
1265 | for (fixp = seginfo->fix_root; fixp != (fixS *) NULL; fixp = fixp->fx_next) |
1266 | { | |
d31f0f6d | 1267 | int fx_size, slack; |
871a6bd2 | 1268 | valueT loc; |
7230378d AM |
1269 | arelent **reloc; |
1270 | #ifndef RELOC_EXPANSION_POSSIBLE | |
1271 | arelent *rel; | |
1272 | ||
1273 | reloc = &rel; | |
1274 | #endif | |
252b5132 RH |
1275 | |
1276 | if (fixp->fx_done) | |
e5435dec | 1277 | continue; |
252b5132 | 1278 | |
d31f0f6d AM |
1279 | fx_size = fixp->fx_size; |
1280 | slack = TC_FX_SIZE_SLACK (fixp); | |
1281 | if (slack > 0) | |
1282 | fx_size = fx_size > slack ? fx_size - slack : 0; | |
1283 | loc = fixp->fx_where + fx_size; | |
e5435dec | 1284 | if (slack >= 0 && loc > fixp->fx_frag->fr_fix) |
d31f0f6d AM |
1285 | as_bad_where (fixp->fx_file, fixp->fx_line, |
1286 | _("internal error: fixup not contained within frag")); | |
252b5132 | 1287 | |
e5435dec | 1288 | #ifndef RELOC_EXPANSION_POSSIBLE |
7230378d | 1289 | *reloc = tc_gen_reloc (sec, fixp); |
e5435dec | 1290 | #else |
7230378d AM |
1291 | reloc = tc_gen_reloc (sec, fixp); |
1292 | #endif | |
252b5132 | 1293 | |
7230378d AM |
1294 | while (*reloc) |
1295 | { | |
1296 | while (r != NULL && r->u.b.r.address < (*reloc)->address) | |
1297 | { | |
1298 | fragS *f = get_frag_for_reloc (last_frag, seginfo, r); | |
1299 | if (f != NULL) | |
1300 | { | |
1301 | last_frag = f; | |
1302 | relocs[n++] = &r->u.b.r; | |
1303 | install_reloc (sec, &r->u.b.r, f, r->file, r->line); | |
1304 | } | |
1305 | r = r->next; | |
1306 | } | |
1307 | relocs[n++] = *reloc; | |
1308 | install_reloc (sec, *reloc, fixp->fx_frag, | |
1309 | fixp->fx_file, fixp->fx_line); | |
1310 | #ifndef RELOC_EXPANSION_POSSIBLE | |
1311 | break; | |
1312 | #else | |
1313 | reloc++; | |
e5435dec | 1314 | #endif |
7230378d AM |
1315 | } |
1316 | } | |
d31f0f6d | 1317 | |
7230378d AM |
1318 | while (r != NULL) |
1319 | { | |
1320 | fragS *f = get_frag_for_reloc (last_frag, seginfo, r); | |
1321 | if (f != NULL) | |
1322 | { | |
1323 | last_frag = f; | |
1324 | relocs[n++] = &r->u.b.r; | |
1325 | install_reloc (sec, &r->u.b.r, f, r->file, r->line); | |
1326 | } | |
1327 | r = r->next; | |
252b5132 | 1328 | } |
252b5132 RH |
1329 | |
1330 | #ifdef DEBUG4 | |
1331 | { | |
1596988d | 1332 | unsigned int k, j, nsyms; |
252b5132 RH |
1333 | asymbol **sympp; |
1334 | sympp = bfd_get_outsymbols (stdoutput); | |
1335 | nsyms = bfd_get_symcount (stdoutput); | |
1596988d TG |
1336 | for (k = 0; k < n; k++) |
1337 | if (((*relocs[k]->sym_ptr_ptr)->flags & BSF_SECTION_SYM) == 0) | |
252b5132 RH |
1338 | { |
1339 | for (j = 0; j < nsyms; j++) | |
1596988d | 1340 | if (sympp[j] == *relocs[k]->sym_ptr_ptr) |
252b5132 RH |
1341 | break; |
1342 | if (j == nsyms) | |
1343 | abort (); | |
1344 | } | |
1345 | } | |
1346 | #endif | |
1347 | ||
1348 | if (n) | |
e5435dec | 1349 | { |
fd361982 | 1350 | flagword flags = bfd_section_flags (sec); |
e5435dec | 1351 | flags |= SEC_RELOC; |
fd361982 | 1352 | bfd_set_section_flags (sec, flags); |
e5435dec AM |
1353 | bfd_set_reloc (stdoutput, sec, relocs, n); |
1354 | } | |
252b5132 | 1355 | |
945a1a6b ILT |
1356 | #ifdef SET_SECTION_RELOCS |
1357 | SET_SECTION_RELOCS (sec, relocs, n); | |
1358 | #endif | |
1359 | ||
252b5132 RH |
1360 | #ifdef DEBUG3 |
1361 | { | |
1596988d TG |
1362 | unsigned int k; |
1363 | ||
252b5132 | 1364 | fprintf (stderr, "relocs for sec %s\n", sec->name); |
1596988d | 1365 | for (k = 0; k < n; k++) |
252b5132 | 1366 | { |
1596988d TG |
1367 | arelent *rel = relocs[k]; |
1368 | asymbol *s = *rel->sym_ptr_ptr; | |
988392e2 | 1369 | fprintf (stderr, " reloc %2d @%p off %4lx : sym %-10s addend %lx\n", |
1596988d TG |
1370 | k, rel, (unsigned long)rel->address, s->name, |
1371 | (unsigned long)rel->addend); | |
252b5132 RH |
1372 | } |
1373 | } | |
1374 | #endif | |
1375 | } | |
1376 | ||
0acf065b CC |
1377 | static int |
1378 | compress_frag (struct z_stream_s *strm, const char *contents, int in_size, | |
1379 | fragS **last_newf, struct obstack *ob) | |
1380 | { | |
1381 | int out_size; | |
1382 | int total_out_size = 0; | |
1383 | fragS *f = *last_newf; | |
1384 | char *next_out; | |
1385 | int avail_out; | |
1386 | ||
1387 | /* Call the compression routine repeatedly until it has finished | |
1388 | processing the frag. */ | |
1389 | while (in_size > 0) | |
1390 | { | |
1391 | /* Reserve all the space available in the current chunk. | |
1392 | If none is available, start a new frag. */ | |
1393 | avail_out = obstack_room (ob); | |
1394 | if (avail_out <= 0) | |
1395 | { | |
1396 | obstack_finish (ob); | |
1397 | f = frag_alloc (ob); | |
1398 | f->fr_type = rs_fill; | |
1399 | (*last_newf)->fr_next = f; | |
1400 | *last_newf = f; | |
1401 | avail_out = obstack_room (ob); | |
1402 | } | |
1403 | if (avail_out <= 0) | |
1404 | as_fatal (_("can't extend frag")); | |
1405 | next_out = obstack_next_free (ob); | |
1406 | obstack_blank_fast (ob, avail_out); | |
1407 | out_size = compress_data (strm, &contents, &in_size, | |
1408 | &next_out, &avail_out); | |
1409 | if (out_size < 0) | |
1410 | return -1; | |
1411 | ||
1412 | f->fr_fix += out_size; | |
1413 | total_out_size += out_size; | |
1414 | ||
1415 | /* Return unused space. */ | |
1416 | if (avail_out > 0) | |
1417 | obstack_blank_fast (ob, -avail_out); | |
1418 | } | |
1419 | ||
1420 | return total_out_size; | |
1421 | } | |
1422 | ||
1423 | static void | |
1424 | compress_debug (bfd *abfd, asection *sec, void *xxx ATTRIBUTE_UNUSED) | |
1425 | { | |
1426 | segment_info_type *seginfo = seg_info (sec); | |
1427 | fragS *f; | |
1428 | fragS *first_newf; | |
1429 | fragS *last_newf; | |
1430 | struct obstack *ob = &seginfo->frchainP->frch_obstack; | |
1431 | bfd_size_type uncompressed_size = (bfd_size_type) sec->size; | |
1432 | bfd_size_type compressed_size; | |
1433 | const char *section_name; | |
1434 | char *compressed_name; | |
1435 | char *header; | |
1436 | struct z_stream_s *strm; | |
1437 | int x; | |
fd361982 | 1438 | flagword flags = bfd_section_flags (sec); |
151411f8 | 1439 | unsigned int header_size, compression_header_size; |
0acf065b CC |
1440 | |
1441 | if (seginfo == NULL | |
6ac88ef3 | 1442 | || sec->size < 32 |
4a114e3e | 1443 | || (flags & (SEC_ALLOC | SEC_HAS_CONTENTS)) == SEC_ALLOC) |
0acf065b CC |
1444 | return; |
1445 | ||
fd361982 | 1446 | section_name = bfd_section_name (sec); |
d34049e8 | 1447 | if (!startswith (section_name, ".debug_")) |
0acf065b CC |
1448 | return; |
1449 | ||
1450 | strm = compress_init (); | |
1451 | if (strm == NULL) | |
1452 | return; | |
1453 | ||
151411f8 | 1454 | if (flag_compress_debug == COMPRESS_DEBUG_GABI_ZLIB) |
dab394de | 1455 | { |
dab394de L |
1456 | compression_header_size |
1457 | = bfd_get_compression_header_size (stdoutput, NULL); | |
1458 | header_size = compression_header_size; | |
1459 | } | |
151411f8 | 1460 | else |
dab394de | 1461 | { |
dab394de L |
1462 | compression_header_size = 0; |
1463 | header_size = 12; | |
1464 | } | |
151411f8 | 1465 | |
dab394de | 1466 | /* Create a new frag to contain the compression header. */ |
0acf065b | 1467 | first_newf = frag_alloc (ob); |
151411f8 | 1468 | if (obstack_room (ob) < header_size) |
0acf065b | 1469 | first_newf = frag_alloc (ob); |
151411f8 | 1470 | if (obstack_room (ob) < header_size) |
992a06ee AM |
1471 | as_fatal (ngettext ("can't extend frag %lu char", |
1472 | "can't extend frag %lu chars", | |
1473 | (unsigned long) header_size), | |
1474 | (unsigned long) header_size); | |
0acf065b | 1475 | last_newf = first_newf; |
151411f8 | 1476 | obstack_blank_fast (ob, header_size); |
0acf065b | 1477 | last_newf->fr_type = rs_fill; |
151411f8 | 1478 | last_newf->fr_fix = header_size; |
0acf065b | 1479 | header = last_newf->fr_literal; |
151411f8 | 1480 | compressed_size = header_size; |
0acf065b CC |
1481 | |
1482 | /* Stream the frags through the compression engine, adding new frags | |
2b0f3761 | 1483 | as necessary to accommodate the compressed output. */ |
0acf065b CC |
1484 | for (f = seginfo->frchainP->frch_root; |
1485 | f; | |
1486 | f = f->fr_next) | |
1487 | { | |
1488 | offsetT fill_size; | |
1489 | char *fill_literal; | |
1490 | offsetT count; | |
1491 | int out_size; | |
1492 | ||
1493 | gas_assert (f->fr_type == rs_fill); | |
1494 | if (f->fr_fix) | |
1495 | { | |
1496 | out_size = compress_frag (strm, f->fr_literal, f->fr_fix, | |
1497 | &last_newf, ob); | |
1498 | if (out_size < 0) | |
1499 | return; | |
1500 | compressed_size += out_size; | |
1501 | } | |
1502 | fill_literal = f->fr_literal + f->fr_fix; | |
1503 | fill_size = f->fr_var; | |
1504 | count = f->fr_offset; | |
1505 | gas_assert (count >= 0); | |
1506 | if (fill_size && count) | |
1507 | { | |
1508 | while (count--) | |
1509 | { | |
1510 | out_size = compress_frag (strm, fill_literal, (int) fill_size, | |
1511 | &last_newf, ob); | |
1512 | if (out_size < 0) | |
1513 | return; | |
1514 | compressed_size += out_size; | |
1515 | } | |
1516 | } | |
1517 | } | |
1518 | ||
1519 | /* Flush the compression state. */ | |
1520 | for (;;) | |
1521 | { | |
1522 | int avail_out; | |
1523 | char *next_out; | |
1524 | int out_size; | |
1525 | ||
1526 | /* Reserve all the space available in the current chunk. | |
1527 | If none is available, start a new frag. */ | |
1528 | avail_out = obstack_room (ob); | |
1529 | if (avail_out <= 0) | |
1530 | { | |
1531 | fragS *newf; | |
1532 | ||
1533 | obstack_finish (ob); | |
1534 | newf = frag_alloc (ob); | |
1535 | newf->fr_type = rs_fill; | |
1536 | last_newf->fr_next = newf; | |
1537 | last_newf = newf; | |
1538 | avail_out = obstack_room (ob); | |
1539 | } | |
1540 | if (avail_out <= 0) | |
1541 | as_fatal (_("can't extend frag")); | |
1542 | next_out = obstack_next_free (ob); | |
1543 | obstack_blank_fast (ob, avail_out); | |
1544 | x = compress_finish (strm, &next_out, &avail_out, &out_size); | |
1545 | if (x < 0) | |
1546 | return; | |
1547 | ||
1548 | last_newf->fr_fix += out_size; | |
1549 | compressed_size += out_size; | |
1550 | ||
1551 | /* Return unused space. */ | |
1552 | if (avail_out > 0) | |
1553 | obstack_blank_fast (ob, -avail_out); | |
1554 | ||
1555 | if (x == 0) | |
1556 | break; | |
1557 | } | |
1558 | ||
b422eb49 L |
1559 | /* PR binutils/18087: If compression didn't make the section smaller, |
1560 | just keep it uncompressed. */ | |
317974f6 | 1561 | if (compressed_size >= uncompressed_size) |
273a4985 | 1562 | return; |
d94077e2 | 1563 | |
0acf065b CC |
1564 | /* Replace the uncompressed frag list with the compressed frag list. */ |
1565 | seginfo->frchainP->frch_root = first_newf; | |
1566 | seginfo->frchainP->frch_last = last_newf; | |
1567 | ||
1568 | /* Update the section size and its name. */ | |
151411f8 | 1569 | bfd_update_compression_header (abfd, (bfd_byte *) header, sec); |
fd361982 | 1570 | x = bfd_set_section_size (sec, compressed_size); |
0acf065b | 1571 | gas_assert (x); |
151411f8 L |
1572 | if (!compression_header_size) |
1573 | { | |
29a2809e | 1574 | compressed_name = concat (".z", section_name + 1, (char *) NULL); |
fd361982 | 1575 | bfd_rename_section (sec, compressed_name); |
151411f8 | 1576 | } |
0acf065b CC |
1577 | } |
1578 | ||
62a02d25 L |
1579 | #ifndef md_generate_nops |
1580 | /* Genenerate COUNT bytes of no-op instructions to WHERE. A target | |
1581 | backend must override this with proper no-op instructions. */ | |
1582 | ||
1583 | static void | |
1584 | md_generate_nops (fragS *f ATTRIBUTE_UNUSED, | |
1585 | char *where ATTRIBUTE_UNUSED, | |
1586 | offsetT count ATTRIBUTE_UNUSED, | |
1587 | int control ATTRIBUTE_UNUSED) | |
1588 | { | |
8f065d3b | 1589 | as_bad (_("unimplemented .nops directive")); |
62a02d25 L |
1590 | } |
1591 | #endif | |
1592 | ||
252b5132 | 1593 | static void |
d7342424 KH |
1594 | write_contents (bfd *abfd ATTRIBUTE_UNUSED, |
1595 | asection *sec, | |
e7ff5c73 | 1596 | void *xxx ATTRIBUTE_UNUSED) |
252b5132 RH |
1597 | { |
1598 | segment_info_type *seginfo = seg_info (sec); | |
685736be | 1599 | addressT offset = 0; |
252b5132 RH |
1600 | fragS *f; |
1601 | ||
1602 | /* Write out the frags. */ | |
1603 | if (seginfo == NULL | |
fd361982 | 1604 | || !(bfd_section_flags (sec) & SEC_HAS_CONTENTS)) |
252b5132 RH |
1605 | return; |
1606 | ||
1607 | for (f = seginfo->frchainP->frch_root; | |
1608 | f; | |
1609 | f = f->fr_next) | |
1610 | { | |
1611 | int x; | |
685736be | 1612 | addressT fill_size; |
252b5132 | 1613 | char *fill_literal; |
685736be | 1614 | offsetT count; |
252b5132 | 1615 | |
62a02d25 | 1616 | gas_assert (f->fr_type == rs_fill || f->fr_type == rs_fill_nop); |
252b5132 RH |
1617 | if (f->fr_fix) |
1618 | { | |
1619 | x = bfd_set_section_contents (stdoutput, sec, | |
1620 | f->fr_literal, (file_ptr) offset, | |
1621 | (bfd_size_type) f->fr_fix); | |
b34976b6 | 1622 | if (!x) |
992a06ee AM |
1623 | as_fatal (ngettext ("can't write %ld byte " |
1624 | "to section %s of %s: '%s'", | |
1625 | "can't write %ld bytes " | |
1626 | "to section %s of %s: '%s'", | |
1627 | (long) f->fr_fix), | |
1628 | (long) f->fr_fix, | |
69f57659 | 1629 | bfd_section_name (sec), bfd_get_filename (stdoutput), |
885afe7b | 1630 | bfd_errmsg (bfd_get_error ())); |
252b5132 RH |
1631 | offset += f->fr_fix; |
1632 | } | |
62a02d25 | 1633 | |
252b5132 RH |
1634 | fill_size = f->fr_var; |
1635 | count = f->fr_offset; | |
62a02d25 L |
1636 | fill_literal = f->fr_literal + f->fr_fix; |
1637 | ||
1638 | if (f->fr_type == rs_fill_nop) | |
1639 | { | |
1640 | gas_assert (count >= 0 && fill_size == 1); | |
1641 | if (count > 0) | |
1642 | { | |
1643 | char *buf = xmalloc (count); | |
1644 | md_generate_nops (f, buf, count, *fill_literal); | |
1645 | x = bfd_set_section_contents | |
1646 | (stdoutput, sec, buf, (file_ptr) offset, | |
1647 | (bfd_size_type) count); | |
1648 | if (!x) | |
1649 | as_fatal (ngettext ("can't fill %ld byte " | |
1650 | "in section %s of %s: '%s'", | |
1651 | "can't fill %ld bytes " | |
1652 | "in section %s of %s: '%s'", | |
69f57659 AM |
1653 | (long) count), |
1654 | (long) count, | |
1655 | bfd_section_name (sec), | |
1656 | bfd_get_filename (stdoutput), | |
1657 | bfd_errmsg (bfd_get_error ())); | |
62a02d25 L |
1658 | offset += count; |
1659 | free (buf); | |
1660 | } | |
1661 | continue; | |
1662 | } | |
1663 | ||
9c2799c2 | 1664 | gas_assert (count >= 0); |
252b5132 RH |
1665 | if (fill_size && count) |
1666 | { | |
1667 | char buf[256]; | |
efaf0ba4 | 1668 | if (fill_size > sizeof (buf)) |
252b5132 | 1669 | { |
efaf0ba4 | 1670 | /* Do it the old way. Can this ever happen? */ |
252b5132 RH |
1671 | while (count--) |
1672 | { | |
1673 | x = bfd_set_section_contents (stdoutput, sec, | |
1674 | fill_literal, | |
1675 | (file_ptr) offset, | |
1676 | (bfd_size_type) fill_size); | |
b34976b6 | 1677 | if (!x) |
992a06ee AM |
1678 | as_fatal (ngettext ("can't fill %ld byte " |
1679 | "in section %s of %s: '%s'", | |
1680 | "can't fill %ld bytes " | |
1681 | "in section %s of %s: '%s'", | |
1682 | (long) fill_size), | |
1683 | (long) fill_size, | |
69f57659 AM |
1684 | bfd_section_name (sec), |
1685 | bfd_get_filename (stdoutput), | |
885afe7b | 1686 | bfd_errmsg (bfd_get_error ())); |
252b5132 RH |
1687 | offset += fill_size; |
1688 | } | |
1689 | } | |
1690 | else | |
1691 | { | |
1692 | /* Build a buffer full of fill objects and output it as | |
1693 | often as necessary. This saves on the overhead of | |
1694 | potentially lots of bfd_set_section_contents calls. */ | |
1695 | int n_per_buf, i; | |
1696 | if (fill_size == 1) | |
1697 | { | |
1698 | n_per_buf = sizeof (buf); | |
1699 | memset (buf, *fill_literal, n_per_buf); | |
1700 | } | |
1701 | else | |
1702 | { | |
1703 | char *bufp; | |
efaf0ba4 | 1704 | n_per_buf = sizeof (buf) / fill_size; |
252b5132 | 1705 | for (i = n_per_buf, bufp = buf; i; i--, bufp += fill_size) |
efaf0ba4 | 1706 | memcpy (bufp, fill_literal, fill_size); |
252b5132 RH |
1707 | } |
1708 | for (; count > 0; count -= n_per_buf) | |
1709 | { | |
1710 | n_per_buf = n_per_buf > count ? count : n_per_buf; | |
efaf0ba4 NC |
1711 | x = bfd_set_section_contents |
1712 | (stdoutput, sec, buf, (file_ptr) offset, | |
1713 | (bfd_size_type) n_per_buf * fill_size); | |
b34976b6 | 1714 | if (!x) |
992a06ee AM |
1715 | as_fatal (ngettext ("can't fill %ld byte " |
1716 | "in section %s of %s: '%s'", | |
1717 | "can't fill %ld bytes " | |
1718 | "in section %s of %s: '%s'", | |
1719 | (long) (n_per_buf * fill_size)), | |
1720 | (long) (n_per_buf * fill_size), | |
69f57659 AM |
1721 | bfd_section_name (sec), |
1722 | bfd_get_filename (stdoutput), | |
a22429b9 | 1723 | bfd_errmsg (bfd_get_error ())); |
252b5132 RH |
1724 | offset += n_per_buf * fill_size; |
1725 | } | |
1726 | } | |
1727 | } | |
1728 | } | |
1729 | } | |
252b5132 | 1730 | |
252b5132 | 1731 | static void |
d7342424 | 1732 | merge_data_into_text (void) |
252b5132 | 1733 | { |
252b5132 RH |
1734 | seg_info (text_section)->frchainP->frch_last->fr_next = |
1735 | seg_info (data_section)->frchainP->frch_root; | |
1736 | seg_info (text_section)->frchainP->frch_last = | |
1737 | seg_info (data_section)->frchainP->frch_last; | |
1738 | seg_info (data_section)->frchainP = 0; | |
252b5132 | 1739 | } |
252b5132 | 1740 | |
252b5132 | 1741 | static void |
d7342424 | 1742 | set_symtab (void) |
252b5132 RH |
1743 | { |
1744 | int nsyms; | |
1745 | asymbol **asympp; | |
1746 | symbolS *symp; | |
5b7c81bd | 1747 | bool result; |
252b5132 RH |
1748 | |
1749 | /* Count symbols. We can't rely on a count made by the loop in | |
1750 | write_object_file, because *_frob_file may add a new symbol or | |
d1bcae83 | 1751 | two. Generate unused section symbols only if needed. */ |
252b5132 RH |
1752 | nsyms = 0; |
1753 | for (symp = symbol_rootP; symp; symp = symbol_next (symp)) | |
d1bcae83 L |
1754 | if (bfd_keep_unused_section_symbols (stdoutput) |
1755 | || !symbol_section_p (symp) | |
1756 | || symbol_used_in_reloc_p (symp)) | |
1757 | nsyms++; | |
252b5132 RH |
1758 | |
1759 | if (nsyms) | |
1760 | { | |
1761 | int i; | |
0e1a166b | 1762 | bfd_size_type amt = (bfd_size_type) nsyms * sizeof (asymbol *); |
252b5132 | 1763 | |
1e9cc1c2 | 1764 | asympp = (asymbol **) bfd_alloc (stdoutput, amt); |
252b5132 | 1765 | symp = symbol_rootP; |
d1bcae83 L |
1766 | for (i = 0; i < nsyms; symp = symbol_next (symp)) |
1767 | if (bfd_keep_unused_section_symbols (stdoutput) | |
1768 | || !symbol_section_p (symp) | |
1769 | || symbol_used_in_reloc_p (symp)) | |
1770 | { | |
1771 | asympp[i] = symbol_get_bfdsym (symp); | |
1772 | if (asympp[i]->flags != BSF_SECTION_SYM | |
1773 | || !(bfd_is_const_section (asympp[i]->section) | |
1774 | && asympp[i]->section->symbol == asympp[i])) | |
1775 | asympp[i]->flags |= BSF_KEEP; | |
1776 | symbol_mark_written (symp); | |
1777 | /* Include this section symbol in the symbol table. */ | |
1778 | if (symbol_section_p (symp)) | |
1779 | asympp[i]->flags |= BSF_SECTION_SYM_USED; | |
1780 | i++; | |
1781 | } | |
252b5132 RH |
1782 | } |
1783 | else | |
1784 | asympp = 0; | |
1785 | result = bfd_set_symtab (stdoutput, asympp, nsyms); | |
9c2799c2 | 1786 | gas_assert (result); |
252b5132 RH |
1787 | symbol_table_frozen = 1; |
1788 | } | |
252b5132 RH |
1789 | |
1790 | /* Finish the subsegments. After every sub-segment, we fake an | |
2edb36e7 | 1791 | ".align ...". This conforms to BSD4.2 brain-damage. We then fake |
252b5132 RH |
1792 | ".fill 0" because that is the kind of frag that requires least |
1793 | thought. ".align" frags like to have a following frag since that | |
1794 | makes calculating their intended length trivial. */ | |
1795 | ||
1796 | #ifndef SUB_SEGMENT_ALIGN | |
18e1d487 | 1797 | #ifdef HANDLE_ALIGN |
436d9e46 | 1798 | /* The last subsegment gets an alignment corresponding to the alignment |
18e1d487 AM |
1799 | of the section. This allows proper nop-filling at the end of |
1800 | code-bearing sections. */ | |
1801 | #define SUB_SEGMENT_ALIGN(SEG, FRCHAIN) \ | |
9028d943 | 1802 | (!(FRCHAIN)->frch_next && subseg_text_p (SEG) \ |
2edb36e7 | 1803 | && !do_not_pad_sections_to_alignment \ |
9028d943 AM |
1804 | ? get_recorded_alignment (SEG) \ |
1805 | : 0) | |
18e1d487 | 1806 | #else |
18e1d487 | 1807 | #define SUB_SEGMENT_ALIGN(SEG, FRCHAIN) 0 |
252b5132 RH |
1808 | #endif |
1809 | #endif | |
1810 | ||
85024cd8 | 1811 | static void |
d98b0e2b | 1812 | subsegs_finish_section (asection *s) |
252b5132 RH |
1813 | { |
1814 | struct frchain *frchainP; | |
d98b0e2b TG |
1815 | segment_info_type *seginfo = seg_info (s); |
1816 | if (!seginfo) | |
1817 | return; | |
252b5132 | 1818 | |
d98b0e2b TG |
1819 | for (frchainP = seginfo->frchainP; |
1820 | frchainP != NULL; | |
1821 | frchainP = frchainP->frch_next) | |
252b5132 | 1822 | { |
93a24ba7 | 1823 | int alignment; |
0a9ef439 | 1824 | |
d98b0e2b | 1825 | subseg_set (s, frchainP->frch_subseg); |
381a1ab3 | 1826 | |
d98b0e2b TG |
1827 | /* This now gets called even if we had errors. In that case, |
1828 | any alignment is meaningless, and, moreover, will look weird | |
1829 | if we are generating a listing. */ | |
93a24ba7 MR |
1830 | if (had_errors ()) |
1831 | do_not_pad_sections_to_alignment = 1; | |
c9049d30 | 1832 | |
93a24ba7 | 1833 | alignment = SUB_SEGMENT_ALIGN (now_seg, frchainP); |
fd361982 | 1834 | if ((bfd_section_flags (now_seg) & SEC_MERGE) |
93a24ba7 MR |
1835 | && now_seg->entsize) |
1836 | { | |
1837 | unsigned int entsize = now_seg->entsize; | |
1838 | int entalign = 0; | |
d98b0e2b | 1839 | |
93a24ba7 MR |
1840 | while ((entsize & 1) == 0) |
1841 | { | |
1842 | ++entalign; | |
1843 | entsize >>= 1; | |
381a1ab3 | 1844 | } |
93a24ba7 MR |
1845 | |
1846 | if (entalign > alignment) | |
1847 | alignment = entalign; | |
d98b0e2b | 1848 | } |
0a9ef439 | 1849 | |
d98b0e2b TG |
1850 | if (subseg_text_p (now_seg)) |
1851 | frag_align_code (alignment, 0); | |
1852 | else | |
1853 | frag_align (alignment, 0, 0); | |
252b5132 | 1854 | |
d98b0e2b TG |
1855 | /* frag_align will have left a new frag. |
1856 | Use this last frag for an empty ".fill". | |
252b5132 | 1857 | |
d98b0e2b TG |
1858 | For this segment ... |
1859 | Create a last frag. Do not leave a "being filled in frag". */ | |
1860 | frag_wane (frag_now); | |
1861 | frag_now->fr_fix = 0; | |
1862 | know (frag_now->fr_next == NULL); | |
252b5132 RH |
1863 | } |
1864 | } | |
1865 | ||
d98b0e2b TG |
1866 | static void |
1867 | subsegs_finish (void) | |
1868 | { | |
1869 | asection *s; | |
1870 | ||
1871 | for (s = stdoutput->sections; s; s = s->next) | |
1872 | subsegs_finish_section (s); | |
1873 | } | |
1874 | ||
1875 | #ifdef OBJ_ELF | |
1876 | static void | |
1877 | create_obj_attrs_section (void) | |
1878 | { | |
1879 | segT s; | |
1880 | char *p; | |
1881 | offsetT size; | |
1882 | const char *name; | |
1883 | ||
1884 | size = bfd_elf_obj_attr_size (stdoutput); | |
0df8ad28 NC |
1885 | if (size == 0) |
1886 | return; | |
1887 | ||
1888 | name = get_elf_backend_data (stdoutput)->obj_attrs_section; | |
1889 | if (!name) | |
1890 | name = ".gnu.attributes"; | |
1891 | s = subseg_new (name, 0); | |
1892 | elf_section_type (s) | |
1893 | = get_elf_backend_data (stdoutput)->obj_attrs_section_type; | |
fd361982 | 1894 | bfd_set_section_flags (s, SEC_READONLY | SEC_DATA); |
0df8ad28 NC |
1895 | frag_now_fix (); |
1896 | p = frag_more (size); | |
1897 | bfd_elf_set_obj_attr_contents (stdoutput, (bfd_byte *)p, size); | |
1898 | ||
1899 | subsegs_finish_section (s); | |
1900 | relax_segment (seg_info (s)->frchainP->frch_root, s, 0); | |
1901 | size_seg (stdoutput, s, NULL); | |
1902 | } | |
1903 | ||
0df8ad28 NC |
1904 | /* Create a relocation against an entry in a GNU Build attribute section. */ |
1905 | ||
1906 | static void | |
1907 | create_note_reloc (segT sec, | |
1908 | symbolS * sym, | |
269b4ded NC |
1909 | bfd_size_type note_offset, |
1910 | bfd_size_type desc2_offset, | |
56c1b507 | 1911 | offsetT desc2_size, |
0df8ad28 NC |
1912 | int reloc_type, |
1913 | bfd_vma addend, | |
1914 | char * note) | |
1915 | { | |
1916 | struct reloc_list * reloc; | |
1917 | ||
1918 | reloc = XNEW (struct reloc_list); | |
1919 | ||
1920 | /* We create a .b type reloc as resolve_reloc_expr_symbols() has already been called. */ | |
269b4ded NC |
1921 | reloc->u.b.sec = sec; |
1922 | reloc->u.b.s = symbol_get_bfdsym (sym); | |
0df8ad28 | 1923 | reloc->u.b.r.sym_ptr_ptr = & reloc->u.b.s; |
269b4ded | 1924 | reloc->u.b.r.address = note_offset + desc2_offset; |
0df8ad28 NC |
1925 | reloc->u.b.r.addend = addend; |
1926 | reloc->u.b.r.howto = bfd_reloc_type_lookup (stdoutput, reloc_type); | |
1927 | ||
1928 | if (reloc->u.b.r.howto == NULL) | |
d98b0e2b | 1929 | { |
0df8ad28 NC |
1930 | as_bad (_("unable to create reloc for build note")); |
1931 | return; | |
1932 | } | |
1933 | ||
1934 | reloc->file = N_("<gnu build note>"); | |
1935 | reloc->line = 0; | |
1936 | ||
1937 | reloc->next = reloc_list; | |
1938 | reloc_list = reloc; | |
1939 | ||
1940 | /* For REL relocs, store the addend in the section. */ | |
1941 | if (! sec->use_rela_p | |
1942 | /* The SH target is a special case that uses RELA relocs | |
1943 | but still stores the addend in the word being relocated. */ | |
1944 | || strstr (bfd_get_target (stdoutput), "-sh") != NULL) | |
1945 | { | |
56c1b507 NC |
1946 | offsetT i; |
1947 | ||
1948 | /* Zero out the addend, since it is now stored in the note. */ | |
1949 | reloc->u.b.r.addend = 0; | |
1950 | ||
0df8ad28 NC |
1951 | if (target_big_endian) |
1952 | { | |
56c1b507 NC |
1953 | for (i = desc2_size; addend != 0 && i > 0; addend >>= 8, i--) |
1954 | note[desc2_offset + i - 1] = (addend & 0xff); | |
0df8ad28 NC |
1955 | } |
1956 | else | |
56c1b507 NC |
1957 | { |
1958 | for (i = 0; addend != 0 && i < desc2_size; addend >>= 8, i++) | |
1959 | note[desc2_offset + i] = (addend & 0xff); | |
1960 | } | |
d98b0e2b TG |
1961 | } |
1962 | } | |
0df8ad28 NC |
1963 | |
1964 | static void | |
1965 | maybe_generate_build_notes (void) | |
1966 | { | |
1967 | segT sec; | |
1968 | char * note; | |
1969 | offsetT note_size; | |
864bb26c | 1970 | offsetT total_size; |
0df8ad28 NC |
1971 | offsetT desc_size; |
1972 | offsetT desc2_offset; | |
1973 | int desc_reloc; | |
1974 | symbolS * sym; | |
8d1015a8 | 1975 | asymbol * bsym; |
0df8ad28 NC |
1976 | |
1977 | if (! flag_generate_build_notes | |
1978 | || bfd_get_section_by_name (stdoutput, | |
1979 | GNU_BUILD_ATTRS_SECTION_NAME) != NULL) | |
1980 | return; | |
1981 | ||
1982 | /* Create a GNU Build Attribute section. */ | |
5b7c81bd | 1983 | sec = subseg_new (GNU_BUILD_ATTRS_SECTION_NAME, false); |
0df8ad28 | 1984 | elf_section_type (sec) = SHT_NOTE; |
61826503 CE |
1985 | bfd_set_section_flags (sec, (SEC_READONLY | SEC_HAS_CONTENTS | SEC_DATA |
1986 | | SEC_OCTETS)); | |
fd361982 | 1987 | bfd_set_section_alignment (sec, 2); |
0df8ad28 | 1988 | |
864bb26c NC |
1989 | /* Work out the size of the notes that we will create, |
1990 | and the relocation we should use. */ | |
0df8ad28 NC |
1991 | if (bfd_arch_bits_per_address (stdoutput) <= 32) |
1992 | { | |
1993 | note_size = 28; | |
1994 | desc_size = 8; /* Two 4-byte offsets. */ | |
1995 | desc2_offset = 24; | |
1996 | ||
1997 | /* FIXME: The BFD backend for the CRX target does not support the | |
1998 | BFD_RELOC_32, even though it really should. Likewise for the | |
1999 | CR16 target. So we have special case code here... */ | |
2000 | if (strstr (bfd_get_target (stdoutput), "-crx") != NULL) | |
2001 | desc_reloc = BFD_RELOC_CRX_NUM32; | |
2002 | else if (strstr (bfd_get_target (stdoutput), "-cr16") != NULL) | |
2003 | desc_reloc = BFD_RELOC_CR16_NUM32; | |
2004 | else | |
2005 | desc_reloc = BFD_RELOC_32; | |
2006 | } | |
2007 | else | |
2008 | { | |
2009 | note_size = 36; | |
2010 | desc_size = 16; /* Two 8-byte offsets. */ | |
2011 | desc2_offset = 28; | |
2012 | /* FIXME: The BFD backend for the IA64 target does not support the | |
2013 | BFD_RELOC_64, even though it really should. The HPPA backend | |
2014 | has a similar issue, although it does not support BFD_RELOCs at | |
2015 | all! So we have special case code to handle these targets. */ | |
2016 | if (strstr (bfd_get_target (stdoutput), "-ia64") != NULL) | |
2017 | desc_reloc = target_big_endian ? BFD_RELOC_IA64_DIR32MSB : BFD_RELOC_IA64_DIR32LSB; | |
2018 | else if (strstr (bfd_get_target (stdoutput), "-hppa") != NULL) | |
2019 | desc_reloc = 80; /* R_PARISC_DIR64. */ | |
2020 | else | |
2021 | desc_reloc = BFD_RELOC_64; | |
2022 | } | |
2023 | ||
864bb26c NC |
2024 | /* We have to create a note for *each* code section. |
2025 | Linker garbage collection might discard some. */ | |
2026 | total_size = 0; | |
2027 | note = NULL; | |
0df8ad28 | 2028 | |
8d1015a8 AM |
2029 | for (sym = symbol_rootP; sym != NULL; sym = symbol_next (sym)) |
2030 | if ((bsym = symbol_get_bfdsym (sym)) != NULL | |
2031 | && bsym->flags & BSF_SECTION_SYM | |
2032 | && bsym->section != NULL | |
2e48456f | 2033 | /* Skip linkonce sections - we cannot use these section symbols as they may disappear. */ |
8d1015a8 | 2034 | && (bsym->section->flags & (SEC_CODE | SEC_LINK_ONCE)) == SEC_CODE |
864bb26c | 2035 | /* Not all linkonce sections are flagged... */ |
d34049e8 | 2036 | && !startswith (S_GET_NAME (sym), ".gnu.linkonce")) |
0df8ad28 | 2037 | { |
864bb26c NC |
2038 | /* Create a version note. */ |
2039 | frag_now_fix (); | |
2040 | note = frag_more (note_size); | |
2041 | memset (note, 0, note_size); | |
0df8ad28 | 2042 | |
864bb26c | 2043 | if (target_big_endian) |
0df8ad28 | 2044 | { |
864bb26c | 2045 | note[3] = 8; /* strlen (name) + 1. */ |
56c1b507 | 2046 | note[7] = desc_size; /* Two N-byte offsets. */ |
864bb26c NC |
2047 | note[10] = NT_GNU_BUILD_ATTRIBUTE_OPEN >> 8; |
2048 | note[11] = NT_GNU_BUILD_ATTRIBUTE_OPEN & 0xff; | |
2049 | } | |
2050 | else | |
2051 | { | |
2052 | note[0] = 8; /* strlen (name) + 1. */ | |
56c1b507 | 2053 | note[4] = desc_size; /* Two N-byte offsets. */ |
864bb26c NC |
2054 | note[8] = NT_GNU_BUILD_ATTRIBUTE_OPEN & 0xff; |
2055 | note[9] = NT_GNU_BUILD_ATTRIBUTE_OPEN >> 8; | |
0df8ad28 | 2056 | } |
0df8ad28 | 2057 | |
864bb26c NC |
2058 | /* The a1 version number indicates that this note was |
2059 | generated by the assembler and not the gcc annobin plugin. */ | |
2060 | memcpy (note + 12, "GA$\ 13a1", 8); | |
2061 | ||
2062 | /* Create a relocation to install the start address of the note... */ | |
56c1b507 | 2063 | create_note_reloc (sec, sym, total_size, 20, desc_size / 2, desc_reloc, 0, note); |
864bb26c NC |
2064 | |
2065 | /* ...and another one to install the end address. */ | |
56c1b507 NC |
2066 | create_note_reloc (sec, sym, total_size, desc2_offset, |
2067 | desc_size / 2, | |
2068 | desc_reloc, | |
fd361982 | 2069 | bfd_section_size (bsym->section), |
864bb26c NC |
2070 | note); |
2071 | ||
d1bcae83 L |
2072 | /* Mark the section symbol used in relocation so that it will be |
2073 | included in the symbol table. */ | |
2074 | symbol_mark_used_in_reloc (sym); | |
2075 | ||
864bb26c NC |
2076 | total_size += note_size; |
2077 | /* FIXME: Maybe add a note recording the assembler command line and version ? */ | |
2078 | } | |
0df8ad28 NC |
2079 | |
2080 | /* Install the note(s) into the section. */ | |
864bb26c NC |
2081 | if (total_size) |
2082 | bfd_set_section_contents (stdoutput, sec, (bfd_byte *) note, 0, total_size); | |
0df8ad28 NC |
2083 | subsegs_finish_section (sec); |
2084 | relax_segment (seg_info (sec)->frchainP->frch_root, sec, 0); | |
2085 | size_seg (stdoutput, sec, NULL); | |
2086 | } | |
2087 | #endif /* OBJ_ELF */ | |
d98b0e2b | 2088 | |
252b5132 RH |
2089 | /* Write the object file. */ |
2090 | ||
2091 | void | |
d7342424 | 2092 | write_object_file (void) |
252b5132 | 2093 | { |
32638454 | 2094 | struct relax_seg_info rsi; |
7be1c489 | 2095 | #ifndef WORKING_DOT_WORD |
efaf0ba4 | 2096 | fragS *fragP; /* Track along all frags. */ |
252b5132 RH |
2097 | #endif |
2098 | ||
85024cd8 AM |
2099 | subsegs_finish (); |
2100 | ||
16a87420 IS |
2101 | #ifdef md_pre_output_hook |
2102 | md_pre_output_hook; | |
2103 | #endif | |
2104 | ||
cdaa5616 IS |
2105 | #ifdef md_pre_relax_hook |
2106 | md_pre_relax_hook; | |
2107 | #endif | |
2108 | ||
252b5132 | 2109 | /* From now on, we don't care about sub-segments. Build one frag chain |
2b0f3761 | 2110 | for each segment. Linked through fr_next. */ |
252b5132 | 2111 | |
252b5132 RH |
2112 | /* Remove the sections created by gas for its own purposes. */ |
2113 | { | |
252b5132 RH |
2114 | int i; |
2115 | ||
5daa8fe7 L |
2116 | bfd_section_list_remove (stdoutput, reg_section); |
2117 | bfd_section_list_remove (stdoutput, expr_section); | |
2118 | stdoutput->section_count -= 2; | |
252b5132 RH |
2119 | i = 0; |
2120 | bfd_map_over_sections (stdoutput, renumber_sections, &i); | |
2121 | } | |
2122 | ||
2123 | bfd_map_over_sections (stdoutput, chain_frchains_together, (char *) 0); | |
252b5132 RH |
2124 | |
2125 | /* We have two segments. If user gave -R flag, then we must put the | |
2126 | data frags into the text segment. Do this before relaxing so | |
2127 | we know to take advantage of -R and make shorter addresses. */ | |
252b5132 RH |
2128 | if (flag_readonly_data_in_text) |
2129 | { | |
2130 | merge_data_into_text (); | |
2131 | } | |
252b5132 | 2132 | |
32638454 | 2133 | rsi.pass = 0; |
e46d99eb AM |
2134 | while (1) |
2135 | { | |
aacb5251 HPN |
2136 | #ifndef WORKING_DOT_WORD |
2137 | /* We need to reset the markers in the broken word list and | |
2138 | associated frags between calls to relax_segment (via | |
2139 | relax_seg). Since the broken word list is global, we do it | |
2140 | once per round, rather than locally in relax_segment for each | |
2141 | segment. */ | |
2142 | struct broken_word *brokp; | |
2143 | ||
2144 | for (brokp = broken_words; | |
2145 | brokp != (struct broken_word *) NULL; | |
2146 | brokp = brokp->next_broken_word) | |
2147 | { | |
2148 | brokp->added = 0; | |
2149 | ||
2150 | if (brokp->dispfrag != (fragS *) NULL | |
2151 | && brokp->dispfrag->fr_type == rs_broken_word) | |
2152 | brokp->dispfrag->fr_subtype = 0; | |
2153 | } | |
2154 | #endif | |
2155 | ||
32638454 AM |
2156 | rsi.changed = 0; |
2157 | bfd_map_over_sections (stdoutput, relax_seg, &rsi); | |
2158 | rsi.pass++; | |
2159 | if (!rsi.changed) | |
e46d99eb AM |
2160 | break; |
2161 | } | |
e027f3e8 | 2162 | |
87548816 NC |
2163 | /* Note - Most ports will use the default value of |
2164 | TC_FINALIZE_SYMS_BEFORE_SIZE_SEG, which 1. This will force | |
2165 | local symbols to be resolved, removing their frag information. | |
2166 | Some ports however, will not have finished relaxing all of | |
2167 | their frags and will still need the local symbol frag | |
2168 | information. These ports can set | |
2169 | TC_FINALIZE_SYMS_BEFORE_SIZE_SEG to 0. */ | |
2170 | finalize_syms = TC_FINALIZE_SYMS_BEFORE_SIZE_SEG; | |
2171 | ||
e46d99eb | 2172 | bfd_map_over_sections (stdoutput, size_seg, (char *) 0); |
e46d99eb | 2173 | |
38b87a1b NC |
2174 | /* Relaxation has completed. Freeze all syms. */ |
2175 | finalize_syms = 1; | |
2176 | ||
ba8826a8 AO |
2177 | dwarf2dbg_final_check (); |
2178 | ||
e0001a05 NC |
2179 | #ifdef md_post_relax_hook |
2180 | md_post_relax_hook; | |
2181 | #endif | |
2182 | ||
d98b0e2b TG |
2183 | #ifdef OBJ_ELF |
2184 | if (IS_ELF) | |
2185 | create_obj_attrs_section (); | |
2186 | #endif | |
2187 | ||
252b5132 RH |
2188 | #ifndef WORKING_DOT_WORD |
2189 | { | |
2190 | struct broken_word *lie; | |
2191 | struct broken_word **prevP; | |
2192 | ||
2193 | prevP = &broken_words; | |
2194 | for (lie = broken_words; lie; lie = lie->next_broken_word) | |
2195 | if (!lie->added) | |
2196 | { | |
2197 | expressionS exp; | |
2198 | ||
2199 | subseg_change (lie->seg, lie->subseg); | |
2200 | exp.X_op = O_subtract; | |
2201 | exp.X_add_symbol = lie->add; | |
2202 | exp.X_op_symbol = lie->sub; | |
2203 | exp.X_add_number = lie->addnum; | |
252b5132 RH |
2204 | #ifdef TC_CONS_FIX_NEW |
2205 | TC_CONS_FIX_NEW (lie->frag, | |
efaf0ba4 | 2206 | lie->word_goes_here - lie->frag->fr_literal, |
62ebcb5c | 2207 | 2, &exp, TC_PARSE_CONS_RETURN_NONE); |
252b5132 RH |
2208 | #else |
2209 | fix_new_exp (lie->frag, | |
2210 | lie->word_goes_here - lie->frag->fr_literal, | |
2211 | 2, &exp, 0, BFD_RELOC_16); | |
2212 | #endif | |
252b5132 RH |
2213 | *prevP = lie->next_broken_word; |
2214 | } | |
2215 | else | |
2216 | prevP = &(lie->next_broken_word); | |
2217 | ||
2218 | for (lie = broken_words; lie;) | |
2219 | { | |
2220 | struct broken_word *untruth; | |
2221 | char *table_ptr; | |
2222 | addressT table_addr; | |
2223 | addressT from_addr, to_addr; | |
2224 | int n, m; | |
2225 | ||
2226 | subseg_change (lie->seg, lie->subseg); | |
2227 | fragP = lie->dispfrag; | |
2228 | ||
2229 | /* Find out how many broken_words go here. */ | |
2230 | n = 0; | |
efaf0ba4 NC |
2231 | for (untruth = lie; |
2232 | untruth && untruth->dispfrag == fragP; | |
2233 | untruth = untruth->next_broken_word) | |
252b5132 RH |
2234 | if (untruth->added == 1) |
2235 | n++; | |
2236 | ||
2237 | table_ptr = lie->dispfrag->fr_opcode; | |
efaf0ba4 NC |
2238 | table_addr = (lie->dispfrag->fr_address |
2239 | + (table_ptr - lie->dispfrag->fr_literal)); | |
252b5132 RH |
2240 | /* Create the jump around the long jumps. This is a short |
2241 | jump from table_ptr+0 to table_ptr+n*long_jump_size. */ | |
2242 | from_addr = table_addr; | |
2243 | to_addr = table_addr + md_short_jump_size + n * md_long_jump_size; | |
efaf0ba4 NC |
2244 | md_create_short_jump (table_ptr, from_addr, to_addr, lie->dispfrag, |
2245 | lie->add); | |
252b5132 RH |
2246 | table_ptr += md_short_jump_size; |
2247 | table_addr += md_short_jump_size; | |
2248 | ||
efaf0ba4 NC |
2249 | for (m = 0; |
2250 | lie && lie->dispfrag == fragP; | |
2251 | m++, lie = lie->next_broken_word) | |
252b5132 RH |
2252 | { |
2253 | if (lie->added == 2) | |
2254 | continue; | |
efaf0ba4 | 2255 | /* Patch the jump table. */ |
187af7df | 2256 | for (untruth = (struct broken_word *) (fragP->fr_symbol); |
efaf0ba4 NC |
2257 | untruth && untruth->dispfrag == fragP; |
2258 | untruth = untruth->next_broken_word) | |
252b5132 RH |
2259 | { |
2260 | if (untruth->use_jump == lie) | |
187af7df HPN |
2261 | { |
2262 | /* This is the offset from ??? to table_ptr+0. | |
2263 | The target is the same for all users of this | |
2264 | md_long_jump, but the "sub" bases (and hence the | |
2265 | offsets) may be different. */ | |
2266 | addressT to_word = table_addr - S_GET_VALUE (untruth->sub); | |
2267 | #ifdef TC_CHECK_ADJUSTED_BROKEN_DOT_WORD | |
2268 | TC_CHECK_ADJUSTED_BROKEN_DOT_WORD (to_word, untruth); | |
2269 | #endif | |
2270 | md_number_to_chars (untruth->word_goes_here, to_word, 2); | |
2271 | } | |
252b5132 RH |
2272 | } |
2273 | ||
efaf0ba4 NC |
2274 | /* Install the long jump. */ |
2275 | /* This is a long jump from table_ptr+0 to the final target. */ | |
252b5132 RH |
2276 | from_addr = table_addr; |
2277 | to_addr = S_GET_VALUE (lie->add) + lie->addnum; | |
efaf0ba4 NC |
2278 | md_create_long_jump (table_ptr, from_addr, to_addr, lie->dispfrag, |
2279 | lie->add); | |
252b5132 RH |
2280 | table_ptr += md_long_jump_size; |
2281 | table_addr += md_long_jump_size; | |
2282 | } | |
2283 | } | |
2284 | } | |
efaf0ba4 | 2285 | #endif /* not WORKING_DOT_WORD */ |
252b5132 | 2286 | |
252b5132 RH |
2287 | /* Resolve symbol values. This needs to be done before processing |
2288 | the relocations. */ | |
2289 | if (symbol_rootP) | |
2290 | { | |
2291 | symbolS *symp; | |
2292 | ||
2293 | for (symp = symbol_rootP; symp; symp = symbol_next (symp)) | |
6386f3a7 | 2294 | resolve_symbol_value (symp); |
252b5132 | 2295 | } |
49309057 | 2296 | resolve_local_symbol_values (); |
05e9452c | 2297 | resolve_reloc_expr_symbols (); |
252b5132 | 2298 | |
0df8ad28 NC |
2299 | #ifdef OBJ_ELF |
2300 | if (IS_ELF) | |
2301 | maybe_generate_build_notes (); | |
2302 | #endif | |
269b4ded | 2303 | |
252b5132 RH |
2304 | PROGRESS (1); |
2305 | ||
2306 | #ifdef tc_frob_file_before_adjust | |
2307 | tc_frob_file_before_adjust (); | |
2308 | #endif | |
2309 | #ifdef obj_frob_file_before_adjust | |
2310 | obj_frob_file_before_adjust (); | |
2311 | #endif | |
2312 | ||
efaf0ba4 | 2313 | bfd_map_over_sections (stdoutput, adjust_reloc_syms, (char *) 0); |
252b5132 | 2314 | |
a161fe53 AM |
2315 | #ifdef tc_frob_file_before_fix |
2316 | tc_frob_file_before_fix (); | |
2317 | #endif | |
2318 | #ifdef obj_frob_file_before_fix | |
2319 | obj_frob_file_before_fix (); | |
2320 | #endif | |
2321 | ||
2322 | bfd_map_over_sections (stdoutput, fix_segment, (char *) 0); | |
2323 | ||
252b5132 RH |
2324 | /* Set up symbol table, and write it out. */ |
2325 | if (symbol_rootP) | |
2326 | { | |
2327 | symbolS *symp; | |
5b7c81bd | 2328 | bool skip_next_symbol = false; |
252b5132 RH |
2329 | |
2330 | for (symp = symbol_rootP; symp; symp = symbol_next (symp)) | |
2331 | { | |
2332 | int punt = 0; | |
2333 | const char *name; | |
2334 | ||
aaac53f5 HPN |
2335 | if (skip_next_symbol) |
2336 | { | |
2337 | /* Don't do anything besides moving the value of the | |
2338 | symbol from the GAS value-field to the BFD value-field. */ | |
2339 | symbol_get_bfdsym (symp)->value = S_GET_VALUE (symp); | |
5b7c81bd | 2340 | skip_next_symbol = false; |
aaac53f5 HPN |
2341 | continue; |
2342 | } | |
2343 | ||
49309057 | 2344 | if (symbol_mri_common_p (symp)) |
252b5132 RH |
2345 | { |
2346 | if (S_IS_EXTERNAL (symp)) | |
2347 | as_bad (_("%s: global symbols not supported in common sections"), | |
2348 | S_GET_NAME (symp)); | |
2349 | symbol_remove (symp, &symbol_rootP, &symbol_lastP); | |
2350 | continue; | |
2351 | } | |
2352 | ||
2353 | name = S_GET_NAME (symp); | |
2354 | if (name) | |
2355 | { | |
efaf0ba4 NC |
2356 | const char *name2 = |
2357 | decode_local_label_name ((char *) S_GET_NAME (symp)); | |
252b5132 RH |
2358 | /* They only differ if `name' is a fb or dollar local |
2359 | label name. */ | |
2360 | if (name2 != name && ! S_IS_DEFINED (symp)) | |
0e389e77 | 2361 | as_bad (_("local label `%s' is not defined"), name2); |
252b5132 RH |
2362 | } |
2363 | ||
2364 | /* Do it again, because adjust_reloc_syms might introduce | |
2365 | more symbols. They'll probably only be section symbols, | |
2366 | but they'll still need to have the values computed. */ | |
6386f3a7 | 2367 | resolve_symbol_value (symp); |
252b5132 RH |
2368 | |
2369 | /* Skip symbols which were equated to undefined or common | |
b4b24b79 | 2370 | symbols. */ |
06e77878 AO |
2371 | if (symbol_equated_reloc_p (symp) |
2372 | || S_IS_WEAKREFR (symp)) | |
252b5132 | 2373 | { |
91d6fa6a NC |
2374 | const char *sname = S_GET_NAME (symp); |
2375 | ||
60938e80 | 2376 | if (S_IS_COMMON (symp) |
91d6fa6a | 2377 | && !TC_FAKE_LABEL (sname) |
76db0a2e | 2378 | && !S_IS_WEAKREFR (symp)) |
60938e80 L |
2379 | { |
2380 | expressionS *e = symbol_get_value_expression (symp); | |
91d6fa6a | 2381 | |
76db0a2e | 2382 | as_bad (_("`%s' can't be equated to common symbol `%s'"), |
91d6fa6a | 2383 | sname, S_GET_NAME (e->X_add_symbol)); |
60938e80 | 2384 | } |
d0548f34 L |
2385 | if (S_GET_SEGMENT (symp) == reg_section) |
2386 | { | |
2387 | /* Report error only if we know the symbol name. */ | |
2388 | if (S_GET_NAME (symp) != reg_section->name) | |
2389 | as_bad (_("can't make global register symbol `%s'"), | |
91d6fa6a | 2390 | sname); |
d0548f34 | 2391 | } |
252b5132 RH |
2392 | symbol_remove (symp, &symbol_rootP, &symbol_lastP); |
2393 | continue; | |
2394 | } | |
2395 | ||
252b5132 RH |
2396 | #ifdef obj_frob_symbol |
2397 | obj_frob_symbol (symp, punt); | |
2398 | #endif | |
2399 | #ifdef tc_frob_symbol | |
49309057 | 2400 | if (! punt || symbol_used_in_reloc_p (symp)) |
252b5132 RH |
2401 | tc_frob_symbol (symp, punt); |
2402 | #endif | |
2403 | ||
2404 | /* If we don't want to keep this symbol, splice it out of | |
2405 | the chain now. If EMIT_SECTION_SYMBOLS is 0, we never | |
2406 | want section symbols. Otherwise, we skip local symbols | |
2407 | and symbols that the frob_symbol macros told us to punt, | |
2408 | but we keep such symbols if they are used in relocs. */ | |
a161fe53 AM |
2409 | if (symp == abs_section_sym |
2410 | || (! EMIT_SECTION_SYMBOLS | |
2411 | && symbol_section_p (symp)) | |
e97b3f28 | 2412 | /* Note that S_IS_EXTERNAL and S_IS_LOCAL are not always |
252b5132 RH |
2413 | opposites. Sometimes the former checks flags and the |
2414 | latter examines the name... */ | |
e97b3f28 | 2415 | || (!S_IS_EXTERNAL (symp) |
461b725f AO |
2416 | && (punt || S_IS_LOCAL (symp) || |
2417 | (S_IS_WEAKREFD (symp) && ! symbol_used_p (symp))) | |
49309057 | 2418 | && ! symbol_used_in_reloc_p (symp))) |
252b5132 RH |
2419 | { |
2420 | symbol_remove (symp, &symbol_rootP, &symbol_lastP); | |
efaf0ba4 | 2421 | |
252b5132 RH |
2422 | /* After symbol_remove, symbol_next(symp) still returns |
2423 | the one that came after it in the chain. So we don't | |
2424 | need to do any extra cleanup work here. */ | |
252b5132 RH |
2425 | continue; |
2426 | } | |
2427 | ||
2428 | /* Make sure we really got a value for the symbol. */ | |
49309057 | 2429 | if (! symbol_resolved_p (symp)) |
252b5132 | 2430 | { |
0e389e77 | 2431 | as_bad (_("can't resolve value for symbol `%s'"), |
252b5132 | 2432 | S_GET_NAME (symp)); |
49309057 | 2433 | symbol_mark_resolved (symp); |
252b5132 RH |
2434 | } |
2435 | ||
2436 | /* Set the value into the BFD symbol. Up til now the value | |
2437 | has only been kept in the gas symbolS struct. */ | |
49309057 | 2438 | symbol_get_bfdsym (symp)->value = S_GET_VALUE (symp); |
aaac53f5 HPN |
2439 | |
2440 | /* A warning construct is a warning symbol followed by the | |
2441 | symbol warned about. Don't let anything object-format or | |
2442 | target-specific muck with it; it's ready for output. */ | |
2443 | if (symbol_get_bfdsym (symp)->flags & BSF_WARNING) | |
5b7c81bd | 2444 | skip_next_symbol = true; |
252b5132 RH |
2445 | } |
2446 | } | |
2447 | ||
2448 | PROGRESS (1); | |
2449 | ||
2450 | /* Now do any format-specific adjustments to the symbol table, such | |
2451 | as adding file symbols. */ | |
2452 | #ifdef tc_adjust_symtab | |
2453 | tc_adjust_symtab (); | |
2454 | #endif | |
2455 | #ifdef obj_adjust_symtab | |
2456 | obj_adjust_symtab (); | |
2457 | #endif | |
2458 | ||
d0548f34 | 2459 | /* Stop if there is an error. */ |
82194874 | 2460 | if (!flag_always_generate_output && had_errors ()) |
d0548f34 L |
2461 | return; |
2462 | ||
252b5132 RH |
2463 | /* Now that all the sizes are known, and contents correct, we can |
2464 | start writing to the file. */ | |
2ae08483 | 2465 | set_symtab (); |
252b5132 RH |
2466 | |
2467 | /* If *_frob_file changes the symbol value at this point, it is | |
2468 | responsible for moving the changed value into symp->bsym->value | |
2469 | as well. Hopefully all symbol value changing can be done in | |
2470 | *_frob_symbol. */ | |
2471 | #ifdef tc_frob_file | |
2472 | tc_frob_file (); | |
2473 | #endif | |
2474 | #ifdef obj_frob_file | |
2475 | obj_frob_file (); | |
2476 | #endif | |
f3d2b04b KT |
2477 | #ifdef obj_coff_generate_pdata |
2478 | obj_coff_generate_pdata (); | |
2479 | #endif | |
0df8ad28 | 2480 | |
252b5132 RH |
2481 | bfd_map_over_sections (stdoutput, write_relocs, (char *) 0); |
2482 | ||
f1c2d4af | 2483 | #ifdef tc_frob_file_after_relocs |
252b5132 RH |
2484 | tc_frob_file_after_relocs (); |
2485 | #endif | |
2486 | #ifdef obj_frob_file_after_relocs | |
2487 | obj_frob_file_after_relocs (); | |
2488 | #endif | |
f1c2d4af | 2489 | |
b8871f35 L |
2490 | #if defined OBJ_ELF || defined OBJ_MAYBE_ELF |
2491 | if (IS_ELF && flag_use_elf_stt_common) | |
2492 | stdoutput->flags |= BFD_CONVERT_ELF_COMMON | BFD_USE_ELF_STT_COMMON; | |
2493 | #endif | |
2494 | ||
0acf065b CC |
2495 | /* Once all relocations have been written, we can compress the |
2496 | contents of the debug sections. This needs to be done before | |
2497 | we start writing any sections, because it will affect the file | |
2498 | layout, which is fixed once we start writing contents. */ | |
2499 | if (flag_compress_debug) | |
8ecb73dd L |
2500 | { |
2501 | if (flag_compress_debug == COMPRESS_DEBUG_GABI_ZLIB) | |
2502 | stdoutput->flags |= BFD_COMPRESS | BFD_COMPRESS_GABI; | |
2503 | else | |
2504 | stdoutput->flags |= BFD_COMPRESS; | |
2505 | bfd_map_over_sections (stdoutput, compress_debug, (char *) 0); | |
2506 | } | |
0acf065b | 2507 | |
252b5132 | 2508 | bfd_map_over_sections (stdoutput, write_contents, (char *) 0); |
252b5132 | 2509 | } |
252b5132 RH |
2510 | |
2511 | #ifdef TC_GENERIC_RELAX_TABLE | |
b65d68b8 L |
2512 | #ifndef md_generic_table_relax_frag |
2513 | #define md_generic_table_relax_frag relax_frag | |
2514 | #endif | |
2515 | ||
252b5132 RH |
2516 | /* Relax a fragment by scanning TC_GENERIC_RELAX_TABLE. */ |
2517 | ||
2518 | long | |
d7342424 | 2519 | relax_frag (segT segment, fragS *fragP, long stretch) |
252b5132 RH |
2520 | { |
2521 | const relax_typeS *this_type; | |
2522 | const relax_typeS *start_type; | |
2523 | relax_substateT next_state; | |
2524 | relax_substateT this_state; | |
685736be | 2525 | offsetT growth; |
38686296 AM |
2526 | offsetT aim; |
2527 | addressT target; | |
2528 | addressT address; | |
2529 | symbolS *symbolP; | |
2530 | const relax_typeS *table; | |
2531 | ||
2532 | target = fragP->fr_offset; | |
37a58883 | 2533 | address = fragP->fr_address + fragP->fr_fix; |
38686296 | 2534 | table = TC_GENERIC_RELAX_TABLE; |
252b5132 RH |
2535 | this_state = fragP->fr_subtype; |
2536 | start_type = this_type = table + this_state; | |
38686296 | 2537 | symbolP = fragP->fr_symbol; |
252b5132 RH |
2538 | |
2539 | if (symbolP) | |
2540 | { | |
c842b53a ILT |
2541 | fragS *sym_frag; |
2542 | ||
2543 | sym_frag = symbol_get_frag (symbolP); | |
2544 | ||
252b5132 | 2545 | #ifndef DIFF_EXPR_OK |
c842b53a | 2546 | know (sym_frag != NULL); |
252b5132 | 2547 | #endif |
a161fe53 | 2548 | know (S_GET_SEGMENT (symbolP) != absolute_section |
c842b53a | 2549 | || sym_frag == &zero_address_frag); |
ac62c346 | 2550 | target += S_GET_VALUE (symbolP); |
252b5132 | 2551 | |
e35a414d AM |
2552 | /* If SYM_FRAG has yet to be reached on this pass, assume it |
2553 | will move by STRETCH just as we did, unless there is an | |
2554 | alignment frag between here and SYM_FRAG. An alignment may | |
2555 | well absorb any STRETCH, and we don't want to choose a larger | |
2556 | branch insn by overestimating the needed reach of this | |
2557 | branch. It isn't critical to calculate TARGET exactly; We | |
2558 | know we'll be doing another pass if STRETCH is non-zero. */ | |
252b5132 | 2559 | |
c842b53a | 2560 | if (stretch != 0 |
38686296 AM |
2561 | && sym_frag->relax_marker != fragP->relax_marker |
2562 | && S_GET_SEGMENT (symbolP) == segment) | |
252b5132 | 2563 | { |
e35a414d AM |
2564 | if (stretch < 0 |
2565 | || sym_frag->region == fragP->region) | |
2566 | target += stretch; | |
e5940dff AM |
2567 | /* If we get here we know we have a forward branch. This |
2568 | relax pass may have stretched previous instructions so | |
2569 | far that omitting STRETCH would make the branch | |
2570 | negative. Don't allow this in case the negative reach is | |
2571 | large enough to require a larger branch instruction. */ | |
2572 | else if (target < address) | |
37a58883 | 2573 | return 0; |
252b5132 RH |
2574 | } |
2575 | } | |
2576 | ||
37a58883 | 2577 | aim = target - address; |
252b5132 | 2578 | #ifdef TC_PCREL_ADJUST |
37a58883 | 2579 | /* Currently only the ns32k and arc needs this. */ |
efaf0ba4 | 2580 | aim += TC_PCREL_ADJUST (fragP); |
efaf0ba4 | 2581 | #endif |
59c871b4 BE |
2582 | |
2583 | #ifdef md_prepare_relax_scan | |
2584 | /* Formerly called M68K_AIM_KLUDGE. */ | |
252b5132 RH |
2585 | md_prepare_relax_scan (fragP, address, aim, this_state, this_type); |
2586 | #endif | |
2587 | ||
2588 | if (aim < 0) | |
2589 | { | |
efaf0ba4 | 2590 | /* Look backwards. */ |
252b5132 RH |
2591 | for (next_state = this_type->rlx_more; next_state;) |
2592 | if (aim >= this_type->rlx_backward) | |
2593 | next_state = 0; | |
2594 | else | |
2595 | { | |
efaf0ba4 | 2596 | /* Grow to next state. */ |
252b5132 RH |
2597 | this_state = next_state; |
2598 | this_type = table + this_state; | |
2599 | next_state = this_type->rlx_more; | |
2600 | } | |
2601 | } | |
2602 | else | |
2603 | { | |
efaf0ba4 | 2604 | /* Look forwards. */ |
252b5132 RH |
2605 | for (next_state = this_type->rlx_more; next_state;) |
2606 | if (aim <= this_type->rlx_forward) | |
2607 | next_state = 0; | |
2608 | else | |
2609 | { | |
efaf0ba4 | 2610 | /* Grow to next state. */ |
252b5132 RH |
2611 | this_state = next_state; |
2612 | this_type = table + this_state; | |
2613 | next_state = this_type->rlx_more; | |
2614 | } | |
2615 | } | |
2616 | ||
2617 | growth = this_type->rlx_length - start_type->rlx_length; | |
2618 | if (growth != 0) | |
2619 | fragP->fr_subtype = this_state; | |
2620 | return growth; | |
2621 | } | |
2622 | ||
efaf0ba4 | 2623 | #endif /* defined (TC_GENERIC_RELAX_TABLE) */ |
252b5132 RH |
2624 | |
2625 | /* Relax_align. Advance location counter to next address that has 'alignment' | |
2626 | lowest order bits all 0s, return size of adjustment made. */ | |
2627 | static relax_addressT | |
ed9e98c2 AM |
2628 | relax_align (relax_addressT address, /* Address now. */ |
2629 | int alignment /* Alignment (binary). */) | |
252b5132 RH |
2630 | { |
2631 | relax_addressT mask; | |
2632 | relax_addressT new_address; | |
2633 | ||
65879393 | 2634 | mask = ~((relax_addressT) ~0 << alignment); |
252b5132 RH |
2635 | new_address = (address + mask) & (~mask); |
2636 | #ifdef LINKER_RELAXING_SHRINKS_ONLY | |
2637 | if (linkrelax) | |
2638 | /* We must provide lots of padding, so the linker can discard it | |
2639 | when needed. The linker will not add extra space, ever. */ | |
2640 | new_address += (1 << alignment); | |
2641 | #endif | |
2642 | return (new_address - address); | |
2643 | } | |
2644 | ||
efaf0ba4 NC |
2645 | /* Now we have a segment, not a crowd of sub-segments, we can make |
2646 | fr_address values. | |
58a77e41 | 2647 | |
efaf0ba4 | 2648 | Relax the frags. |
58a77e41 | 2649 | |
efaf0ba4 NC |
2650 | After this, all frags in this segment have addresses that are correct |
2651 | within the segment. Since segments live in different file addresses, | |
2652 | these frag addresses may not be the same as final object-file | |
2653 | addresses. */ | |
2654 | ||
e46d99eb | 2655 | int |
32638454 | 2656 | relax_segment (struct frag *segment_frag_root, segT segment, int pass) |
252b5132 | 2657 | { |
4111faa5 NC |
2658 | unsigned long frag_count; |
2659 | struct frag *fragP; | |
2660 | relax_addressT address; | |
e35a414d | 2661 | int region; |
e46d99eb AM |
2662 | int ret; |
2663 | ||
efaf0ba4 | 2664 | /* In case md_estimate_size_before_relax() wants to make fixSs. */ |
252b5132 RH |
2665 | subseg_change (segment, 0); |
2666 | ||
2667 | /* For each frag in segment: count and store (a 1st guess of) | |
2668 | fr_address. */ | |
2669 | address = 0; | |
e35a414d | 2670 | region = 0; |
4111faa5 NC |
2671 | for (frag_count = 0, fragP = segment_frag_root; |
2672 | fragP; | |
2673 | fragP = fragP->fr_next, frag_count ++) | |
252b5132 | 2674 | { |
e35a414d | 2675 | fragP->region = region; |
38686296 | 2676 | fragP->relax_marker = 0; |
252b5132 RH |
2677 | fragP->fr_address = address; |
2678 | address += fragP->fr_fix; | |
2679 | ||
2680 | switch (fragP->fr_type) | |
2681 | { | |
2682 | case rs_fill: | |
2683 | address += fragP->fr_offset * fragP->fr_var; | |
2684 | break; | |
2685 | ||
2686 | case rs_align: | |
2687 | case rs_align_code: | |
0a9ef439 | 2688 | case rs_align_test: |
252b5132 RH |
2689 | { |
2690 | addressT offset = relax_align (address, (int) fragP->fr_offset); | |
2691 | ||
2692 | if (fragP->fr_subtype != 0 && offset > fragP->fr_subtype) | |
2693 | offset = 0; | |
2694 | ||
2695 | if (offset % fragP->fr_var != 0) | |
2696 | { | |
54d3cad9 | 2697 | as_bad_where (fragP->fr_file, fragP->fr_line, |
992a06ee AM |
2698 | ngettext ("alignment padding (%lu byte) " |
2699 | "not a multiple of %ld", | |
2700 | "alignment padding (%lu bytes) " | |
2701 | "not a multiple of %ld", | |
2702 | (unsigned long) offset), | |
54d3cad9 | 2703 | (unsigned long) offset, (long) fragP->fr_var); |
252b5132 RH |
2704 | offset -= (offset % fragP->fr_var); |
2705 | } | |
2706 | ||
2707 | address += offset; | |
e35a414d | 2708 | region += 1; |
252b5132 RH |
2709 | } |
2710 | break; | |
2711 | ||
2712 | case rs_org: | |
252b5132 | 2713 | /* Assume .org is nugatory. It will grow with 1st relax. */ |
e35a414d AM |
2714 | region += 1; |
2715 | break; | |
2716 | ||
2717 | case rs_space: | |
62a02d25 | 2718 | case rs_space_nop: |
252b5132 RH |
2719 | break; |
2720 | ||
2721 | case rs_machine_dependent: | |
e0890092 AM |
2722 | /* If fr_symbol is an expression, this call to |
2723 | resolve_symbol_value sets up the correct segment, which will | |
2724 | likely be needed in md_estimate_size_before_relax. */ | |
2725 | if (fragP->fr_symbol) | |
2726 | resolve_symbol_value (fragP->fr_symbol); | |
2727 | ||
252b5132 RH |
2728 | address += md_estimate_size_before_relax (fragP, segment); |
2729 | break; | |
2730 | ||
2731 | #ifndef WORKING_DOT_WORD | |
efaf0ba4 | 2732 | /* Broken words don't concern us yet. */ |
252b5132 RH |
2733 | case rs_broken_word: |
2734 | break; | |
2735 | #endif | |
2736 | ||
2737 | case rs_leb128: | |
efaf0ba4 | 2738 | /* Initial guess is always 1; doing otherwise can result in |
252b5132 RH |
2739 | stable solutions that are larger than the minimum. */ |
2740 | address += fragP->fr_offset = 1; | |
2741 | break; | |
2742 | ||
2743 | case rs_cfa: | |
2744 | address += eh_frame_estimate_size_before_relax (fragP); | |
2745 | break; | |
2746 | ||
220e750f RH |
2747 | case rs_dwarf2dbg: |
2748 | address += dwarf2dbg_estimate_size_before_relax (fragP); | |
2749 | break; | |
2750 | ||
252b5132 RH |
2751 | default: |
2752 | BAD_CASE (fragP->fr_type); | |
2753 | break; | |
efaf0ba4 NC |
2754 | } |
2755 | } | |
252b5132 RH |
2756 | |
2757 | /* Do relax(). */ | |
2758 | { | |
4111faa5 | 2759 | unsigned long max_iterations; |
d1c5f158 AM |
2760 | |
2761 | /* Cumulative address adjustment. */ | |
2762 | offsetT stretch; | |
2763 | ||
2764 | /* Have we made any adjustment this pass? We can't just test | |
2765 | stretch because one piece of code may have grown and another | |
2766 | shrank. */ | |
2767 | int stretched; | |
2768 | ||
2769 | /* Most horrible, but gcc may give us some exception data that | |
2770 | is impossible to assemble, of the form | |
2771 | ||
2772 | .align 4 | |
2773 | .byte 0, 0 | |
2774 | .uleb128 end - start | |
2775 | start: | |
2776 | .space 128*128 - 1 | |
2777 | .align 4 | |
2778 | end: | |
2779 | ||
2780 | If the leb128 is two bytes in size, then end-start is 128*128, | |
2781 | which requires a three byte leb128. If the leb128 is three | |
2782 | bytes in size, then end-start is 128*128-1, which requires a | |
2783 | two byte leb128. We work around this dilemma by inserting | |
2784 | an extra 4 bytes of alignment just after the .align. This | |
2785 | works because the data after the align is accessed relative to | |
2786 | the end label. | |
2787 | ||
2788 | This counter is used in a tiny state machine to detect | |
2789 | whether a leb128 followed by an align is impossible to | |
2790 | relax. */ | |
2791 | int rs_leb128_fudge = 0; | |
252b5132 | 2792 | |
4111faa5 NC |
2793 | /* We want to prevent going into an infinite loop where one frag grows |
2794 | depending upon the location of a symbol which is in turn moved by | |
2795 | the growing frag. eg: | |
2796 | ||
b4b24b79 AM |
2797 | foo = . |
2798 | .org foo+16 | |
2799 | foo = . | |
4111faa5 | 2800 | |
b4b24b79 | 2801 | So we dictate that this algorithm can be at most O2. */ |
4111faa5 NC |
2802 | max_iterations = frag_count * frag_count; |
2803 | /* Check for overflow. */ | |
2804 | if (max_iterations < frag_count) | |
2805 | max_iterations = frag_count; | |
2806 | ||
32638454 | 2807 | ret = 0; |
252b5132 RH |
2808 | do |
2809 | { | |
e46d99eb AM |
2810 | stretch = 0; |
2811 | stretched = 0; | |
58a77e41 | 2812 | |
252b5132 RH |
2813 | for (fragP = segment_frag_root; fragP; fragP = fragP->fr_next) |
2814 | { | |
685736be | 2815 | offsetT growth = 0; |
252b5132 RH |
2816 | addressT was_address; |
2817 | offsetT offset; | |
2818 | symbolS *symbolP; | |
2819 | ||
38686296 | 2820 | fragP->relax_marker ^= 1; |
252b5132 RH |
2821 | was_address = fragP->fr_address; |
2822 | address = fragP->fr_address += stretch; | |
2823 | symbolP = fragP->fr_symbol; | |
2824 | offset = fragP->fr_offset; | |
2825 | ||
2826 | switch (fragP->fr_type) | |
2827 | { | |
efaf0ba4 | 2828 | case rs_fill: /* .fill never relaxes. */ |
252b5132 RH |
2829 | growth = 0; |
2830 | break; | |
2831 | ||
2832 | #ifndef WORKING_DOT_WORD | |
2833 | /* JF: This is RMS's idea. I do *NOT* want to be blamed | |
2834 | for it I do not want to write it. I do not want to have | |
2835 | anything to do with it. This is not the proper way to | |
2836 | implement this misfeature. */ | |
2837 | case rs_broken_word: | |
2838 | { | |
2839 | struct broken_word *lie; | |
2840 | struct broken_word *untruth; | |
2841 | ||
2842 | /* Yes this is ugly (storing the broken_word pointer | |
2843 | in the symbol slot). Still, this whole chunk of | |
2844 | code is ugly, and I don't feel like doing anything | |
2845 | about it. Think of it as stubbornness in action. */ | |
2846 | growth = 0; | |
2847 | for (lie = (struct broken_word *) (fragP->fr_symbol); | |
2848 | lie && lie->dispfrag == fragP; | |
2849 | lie = lie->next_broken_word) | |
2850 | { | |
2851 | ||
2852 | if (lie->added) | |
2853 | continue; | |
2854 | ||
ac62c346 | 2855 | offset = (S_GET_VALUE (lie->add) |
252b5132 | 2856 | + lie->addnum |
ac62c346 | 2857 | - S_GET_VALUE (lie->sub)); |
252b5132 RH |
2858 | if (offset <= -32768 || offset >= 32767) |
2859 | { | |
2860 | if (flag_warn_displacement) | |
2861 | { | |
2862 | char buf[50]; | |
9a8041fd JB |
2863 | |
2864 | bfd_sprintf_vma (stdoutput, buf, | |
2865 | (addressT) lie->addnum); | |
54d3cad9 AM |
2866 | as_warn_where (fragP->fr_file, fragP->fr_line, |
2867 | _(".word %s-%s+%s didn't fit"), | |
2868 | S_GET_NAME (lie->add), | |
2869 | S_GET_NAME (lie->sub), | |
2870 | buf); | |
252b5132 | 2871 | } |
252b5132 RH |
2872 | if (fragP->fr_subtype == 0) |
2873 | { | |
2874 | fragP->fr_subtype++; | |
2875 | growth += md_short_jump_size; | |
2876 | } | |
187af7df HPN |
2877 | |
2878 | /* Redirect *all* words of this table with the same | |
2879 | target, lest we have to handle the case where the | |
2880 | same target but with a offset that fits on this | |
2881 | round overflows at the next relaxation round. */ | |
2882 | for (untruth = (struct broken_word *) (fragP->fr_symbol); | |
252b5132 RH |
2883 | untruth && untruth->dispfrag == lie->dispfrag; |
2884 | untruth = untruth->next_broken_word) | |
49309057 ILT |
2885 | if ((symbol_get_frag (untruth->add) |
2886 | == symbol_get_frag (lie->add)) | |
2887 | && (S_GET_VALUE (untruth->add) | |
2888 | == S_GET_VALUE (lie->add))) | |
252b5132 RH |
2889 | { |
2890 | untruth->added = 2; | |
2891 | untruth->use_jump = lie; | |
2892 | } | |
187af7df HPN |
2893 | |
2894 | lie->added = 1; | |
252b5132 RH |
2895 | growth += md_long_jump_size; |
2896 | } | |
2897 | } | |
2898 | ||
2899 | break; | |
efaf0ba4 | 2900 | } /* case rs_broken_word */ |
252b5132 RH |
2901 | #endif |
2902 | case rs_align: | |
2903 | case rs_align_code: | |
0a9ef439 | 2904 | case rs_align_test: |
252b5132 RH |
2905 | { |
2906 | addressT oldoff, newoff; | |
2907 | ||
2908 | oldoff = relax_align (was_address + fragP->fr_fix, | |
2909 | (int) offset); | |
2910 | newoff = relax_align (address + fragP->fr_fix, | |
2911 | (int) offset); | |
2912 | ||
2913 | if (fragP->fr_subtype != 0) | |
2914 | { | |
2915 | if (oldoff > fragP->fr_subtype) | |
2916 | oldoff = 0; | |
2917 | if (newoff > fragP->fr_subtype) | |
2918 | newoff = 0; | |
2919 | } | |
2920 | ||
2921 | growth = newoff - oldoff; | |
d1c5f158 AM |
2922 | |
2923 | /* If this align happens to follow a leb128 and | |
2924 | we have determined that the leb128 is bouncing | |
2925 | in size, then break the cycle by inserting an | |
2926 | extra alignment. */ | |
2927 | if (growth < 0 | |
2928 | && (rs_leb128_fudge & 16) != 0 | |
2929 | && (rs_leb128_fudge & 15) >= 2) | |
2930 | { | |
2931 | segment_info_type *seginfo = seg_info (segment); | |
2932 | struct obstack *ob = &seginfo->frchainP->frch_obstack; | |
2933 | struct frag *newf; | |
2934 | ||
2935 | newf = frag_alloc (ob); | |
2936 | obstack_blank_fast (ob, fragP->fr_var); | |
2937 | obstack_finish (ob); | |
2938 | memcpy (newf, fragP, SIZEOF_STRUCT_FRAG); | |
2939 | memcpy (newf->fr_literal, | |
2940 | fragP->fr_literal + fragP->fr_fix, | |
2941 | fragP->fr_var); | |
2942 | newf->fr_type = rs_fill; | |
20f5cfbd | 2943 | newf->fr_address = address + fragP->fr_fix + newoff; |
d1c5f158 AM |
2944 | newf->fr_fix = 0; |
2945 | newf->fr_offset = (((offsetT) 1 << fragP->fr_offset) | |
2946 | / fragP->fr_var); | |
2947 | if (newf->fr_offset * newf->fr_var | |
2948 | != (offsetT) 1 << fragP->fr_offset) | |
2949 | { | |
2950 | newf->fr_offset = (offsetT) 1 << fragP->fr_offset; | |
2951 | newf->fr_var = 1; | |
2952 | } | |
20f5cfbd | 2953 | /* Include size of new frag in GROWTH. */ |
d1c5f158 | 2954 | growth += newf->fr_offset * newf->fr_var; |
20f5cfbd AM |
2955 | /* Adjust the new frag address for the amount |
2956 | we'll add when we process the new frag. */ | |
2957 | newf->fr_address -= stretch + growth; | |
d1c5f158 AM |
2958 | newf->relax_marker ^= 1; |
2959 | fragP->fr_next = newf; | |
2960 | #ifdef DEBUG | |
2961 | as_warn (_("padding added")); | |
2962 | #endif | |
2963 | } | |
252b5132 RH |
2964 | } |
2965 | break; | |
2966 | ||
2967 | case rs_org: | |
2968 | { | |
c39c821c | 2969 | offsetT target = offset; |
e46d99eb | 2970 | addressT after; |
252b5132 RH |
2971 | |
2972 | if (symbolP) | |
2973 | { | |
b4b24b79 AM |
2974 | /* Convert from an actual address to an octet offset |
2975 | into the section. Here it is assumed that the | |
2976 | section's VMA is zero, and can omit subtracting it | |
2977 | from the symbol's value to get the address offset. */ | |
2978 | know (S_GET_SEGMENT (symbolP)->vma == 0); | |
6e917903 | 2979 | target += S_GET_VALUE (symbolP) * OCTETS_PER_BYTE; |
ac62c346 | 2980 | } |
252b5132 RH |
2981 | |
2982 | know (fragP->fr_next); | |
6afe8e98 | 2983 | after = fragP->fr_next->fr_address + stretch; |
252b5132 | 2984 | growth = target - after; |
9875b365 MR |
2985 | |
2986 | /* Growth may be negative, but variable part of frag | |
2987 | cannot have fewer than 0 chars. That is, we can't | |
2988 | .org backwards. */ | |
c39c821c | 2989 | if ((offsetT) (address + fragP->fr_fix) > target) |
252b5132 | 2990 | { |
32638454 AM |
2991 | growth = 0; |
2992 | ||
2993 | /* Don't error on first few frag relax passes. | |
2994 | The symbol might be an expression involving | |
2995 | symbol values from other sections. If those | |
2996 | sections have not yet been processed their | |
2997 | frags will all have zero addresses, so we | |
2998 | will calculate incorrect values for them. The | |
2999 | number of passes we allow before giving an | |
3000 | error is somewhat arbitrary. It should be at | |
3001 | least one, with larger values requiring | |
3002 | increasingly contrived dependencies between | |
3003 | frags to trigger a false error. */ | |
3004 | if (pass < 2) | |
3005 | { | |
3006 | /* Force another pass. */ | |
3007 | ret = 1; | |
3008 | break; | |
3009 | } | |
3010 | ||
14ad458a | 3011 | as_bad_where (fragP->fr_file, fragP->fr_line, |
685736be | 3012 | _("attempt to move .org backwards")); |
14ad458a ILT |
3013 | |
3014 | /* We've issued an error message. Change the | |
b4b24b79 | 3015 | frag to avoid cascading errors. */ |
14ad458a ILT |
3016 | fragP->fr_type = rs_align; |
3017 | fragP->fr_subtype = 0; | |
3018 | fragP->fr_offset = 0; | |
6afe8e98 | 3019 | fragP->fr_fix = after - address; |
252b5132 | 3020 | } |
252b5132 | 3021 | } |
6afe8e98 | 3022 | break; |
252b5132 RH |
3023 | |
3024 | case rs_space: | |
62a02d25 | 3025 | case rs_space_nop: |
54d3cad9 | 3026 | growth = 0; |
252b5132 RH |
3027 | if (symbolP) |
3028 | { | |
766c03c9 AM |
3029 | offsetT amount; |
3030 | ||
3031 | amount = S_GET_VALUE (symbolP); | |
9e40345d | 3032 | if (S_GET_SEGMENT (symbolP) != absolute_section |
252b5132 RH |
3033 | || S_IS_COMMON (symbolP) |
3034 | || ! S_IS_DEFINED (symbolP)) | |
252b5132 | 3035 | { |
54d3cad9 | 3036 | as_bad_where (fragP->fr_file, fragP->fr_line, |
b1766e7c | 3037 | _(".space, .nops or .fill specifies non-absolute value")); |
54d3cad9 AM |
3038 | /* Prevent repeat of this error message. */ |
3039 | fragP->fr_symbol = 0; | |
3040 | } | |
3041 | else if (amount < 0) | |
3042 | { | |
32638454 AM |
3043 | /* Don't error on first few frag relax passes. |
3044 | See rs_org comment for a longer explanation. */ | |
3045 | if (pass < 2) | |
3046 | { | |
3047 | ret = 1; | |
3048 | break; | |
3049 | } | |
3050 | ||
54d3cad9 | 3051 | as_warn_where (fragP->fr_file, fragP->fr_line, |
8f065d3b | 3052 | _(".space, .nops or .fill with negative value, ignored")); |
766c03c9 | 3053 | fragP->fr_symbol = 0; |
252b5132 | 3054 | } |
54d3cad9 | 3055 | else |
050be34e | 3056 | growth = (was_address + fragP->fr_fix + amount |
54d3cad9 | 3057 | - fragP->fr_next->fr_address); |
252b5132 | 3058 | } |
252b5132 RH |
3059 | break; |
3060 | ||
3061 | case rs_machine_dependent: | |
3062 | #ifdef md_relax_frag | |
c842b53a | 3063 | growth = md_relax_frag (segment, fragP, stretch); |
252b5132 RH |
3064 | #else |
3065 | #ifdef TC_GENERIC_RELAX_TABLE | |
3066 | /* The default way to relax a frag is to look through | |
3067 | TC_GENERIC_RELAX_TABLE. */ | |
b65d68b8 L |
3068 | growth = md_generic_table_relax_frag (segment, fragP, |
3069 | stretch); | |
efaf0ba4 | 3070 | #endif /* TC_GENERIC_RELAX_TABLE */ |
252b5132 RH |
3071 | #endif |
3072 | break; | |
3073 | ||
3074 | case rs_leb128: | |
3075 | { | |
3076 | valueT value; | |
685736be | 3077 | offsetT size; |
252b5132 | 3078 | |
6386f3a7 | 3079 | value = resolve_symbol_value (fragP->fr_symbol); |
252b5132 RH |
3080 | size = sizeof_leb128 (value, fragP->fr_subtype); |
3081 | growth = size - fragP->fr_offset; | |
3082 | fragP->fr_offset = size; | |
3083 | } | |
3084 | break; | |
3085 | ||
3086 | case rs_cfa: | |
3087 | growth = eh_frame_relax_frag (fragP); | |
3088 | break; | |
3089 | ||
220e750f RH |
3090 | case rs_dwarf2dbg: |
3091 | growth = dwarf2dbg_relax_frag (fragP); | |
3092 | break; | |
3093 | ||
252b5132 RH |
3094 | default: |
3095 | BAD_CASE (fragP->fr_type); | |
3096 | break; | |
3097 | } | |
3098 | if (growth) | |
3099 | { | |
3100 | stretch += growth; | |
e46d99eb | 3101 | stretched = 1; |
d1c5f158 AM |
3102 | if (fragP->fr_type == rs_leb128) |
3103 | rs_leb128_fudge += 16; | |
3104 | else if (fragP->fr_type == rs_align | |
3105 | && (rs_leb128_fudge & 16) != 0 | |
3106 | && stretch == 0) | |
3107 | rs_leb128_fudge += 16; | |
3108 | else | |
3109 | rs_leb128_fudge = 0; | |
252b5132 | 3110 | } |
4111faa5 | 3111 | } |
d1c5f158 AM |
3112 | |
3113 | if (stretch == 0 | |
3114 | && (rs_leb128_fudge & 16) == 0 | |
3115 | && (rs_leb128_fudge & -16) != 0) | |
3116 | rs_leb128_fudge += 1; | |
3117 | else | |
3118 | rs_leb128_fudge = 0; | |
252b5132 | 3119 | } |
4111faa5 NC |
3120 | /* Until nothing further to relax. */ |
3121 | while (stretched && -- max_iterations); | |
3122 | ||
3123 | if (stretched) | |
3124 | as_fatal (_("Infinite loop encountered whilst attempting to compute the addresses of symbols in section %s"), | |
3125 | segment_name (segment)); | |
3126 | } | |
252b5132 | 3127 | |
e46d99eb AM |
3128 | for (fragP = segment_frag_root; fragP; fragP = fragP->fr_next) |
3129 | if (fragP->last_fr_address != fragP->fr_address) | |
3130 | { | |
3131 | fragP->last_fr_address = fragP->fr_address; | |
3132 | ret = 1; | |
3133 | } | |
3134 | return ret; | |
efaf0ba4 | 3135 | } |
252b5132 | 3136 | |
252b5132 | 3137 | void |
d7342424 | 3138 | number_to_chars_bigendian (char *buf, valueT val, int n) |
252b5132 | 3139 | { |
937149dd | 3140 | if (n <= 0) |
252b5132 RH |
3141 | abort (); |
3142 | while (n--) | |
3143 | { | |
3144 | buf[n] = val & 0xff; | |
3145 | val >>= 8; | |
3146 | } | |
3147 | } | |
3148 | ||
3149 | void | |
d7342424 | 3150 | number_to_chars_littleendian (char *buf, valueT val, int n) |
252b5132 | 3151 | { |
937149dd | 3152 | if (n <= 0) |
252b5132 RH |
3153 | abort (); |
3154 | while (n--) | |
3155 | { | |
3156 | *buf++ = val & 0xff; | |
3157 | val >>= 8; | |
3158 | } | |
3159 | } | |
3160 | ||
3161 | void | |
d7342424 | 3162 | write_print_statistics (FILE *file) |
252b5132 | 3163 | { |
6d4d30bb | 3164 | fprintf (file, "fixups: %d\n", n_fixups); |
252b5132 RH |
3165 | } |
3166 | ||
efaf0ba4 | 3167 | /* For debugging. */ |
252b5132 RH |
3168 | extern int indent_level; |
3169 | ||
3170 | void | |
d7342424 | 3171 | print_fixup (fixS *fixp) |
252b5132 RH |
3172 | { |
3173 | indent_level = 1; | |
d2df793a NC |
3174 | fprintf (stderr, "fix "); |
3175 | fprintf_vma (stderr, (bfd_vma)((bfd_hostptr_t) fixp)); | |
3176 | fprintf (stderr, " %s:%d",fixp->fx_file, fixp->fx_line); | |
252b5132 RH |
3177 | if (fixp->fx_pcrel) |
3178 | fprintf (stderr, " pcrel"); | |
3179 | if (fixp->fx_pcrel_adjust) | |
3180 | fprintf (stderr, " pcrel_adjust=%d", fixp->fx_pcrel_adjust); | |
252b5132 RH |
3181 | if (fixp->fx_tcbit) |
3182 | fprintf (stderr, " tcbit"); | |
3183 | if (fixp->fx_done) | |
3184 | fprintf (stderr, " done"); | |
d2df793a NC |
3185 | fprintf (stderr, "\n size=%d frag=", fixp->fx_size); |
3186 | fprintf_vma (stderr, (bfd_vma) ((bfd_hostptr_t) fixp->fx_frag)); | |
3187 | fprintf (stderr, " where=%ld offset=%lx addnumber=%lx", | |
3188 | (long) fixp->fx_where, | |
0af1713e AM |
3189 | (unsigned long) fixp->fx_offset, |
3190 | (unsigned long) fixp->fx_addnumber); | |
252b5132 RH |
3191 | fprintf (stderr, "\n %s (%d)", bfd_get_reloc_code_name (fixp->fx_r_type), |
3192 | fixp->fx_r_type); | |
252b5132 RH |
3193 | if (fixp->fx_addsy) |
3194 | { | |
3195 | fprintf (stderr, "\n +<"); | |
3196 | print_symbol_value_1 (stderr, fixp->fx_addsy); | |
3197 | fprintf (stderr, ">"); | |
3198 | } | |
3199 | if (fixp->fx_subsy) | |
3200 | { | |
3201 | fprintf (stderr, "\n -<"); | |
3202 | print_symbol_value_1 (stderr, fixp->fx_subsy); | |
3203 | fprintf (stderr, ">"); | |
3204 | } | |
3205 | fprintf (stderr, "\n"); | |
3206 | #ifdef TC_FIX_DATA_PRINT | |
3207 | TC_FIX_DATA_PRINT (stderr, fixp); | |
3208 | #endif | |
3209 | } |