Commit | Line | Data |
---|---|---|
252b5132 | 1 | /* write.c - emit .o file |
250d07de | 2 | Copyright (C) 1986-2021 Free Software Foundation, Inc. |
252b5132 RH |
3 | |
4 | This file is part of GAS, the GNU Assembler. | |
5 | ||
6 | GAS is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
ec2655a6 | 8 | the Free Software Foundation; either version 3, or (at your option) |
252b5132 RH |
9 | any later version. |
10 | ||
11 | GAS is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with GAS; see the file COPYING. If not, write to the Free | |
4b4da160 NC |
18 | Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA |
19 | 02110-1301, USA. */ | |
252b5132 | 20 | |
33eaf5de | 21 | /* This thing should be set up to do byte ordering correctly. But... */ |
252b5132 RH |
22 | |
23 | #include "as.h" | |
24 | #include "subsegs.h" | |
25 | #include "obstack.h" | |
26 | #include "output-file.h" | |
220e750f | 27 | #include "dwarf2dbg.h" |
0acf065b | 28 | #include "compress-debug.h" |
252b5132 | 29 | |
252b5132 | 30 | #ifndef TC_FORCE_RELOCATION |
a161fe53 | 31 | #define TC_FORCE_RELOCATION(FIX) \ |
ae6063d4 | 32 | (generic_force_reloc (FIX)) |
252b5132 RH |
33 | #endif |
34 | ||
a161fe53 AM |
35 | #ifndef TC_FORCE_RELOCATION_ABS |
36 | #define TC_FORCE_RELOCATION_ABS(FIX) \ | |
37 | (TC_FORCE_RELOCATION (FIX)) | |
38 | #endif | |
39 | ||
91cb9803 | 40 | #define GENERIC_FORCE_RELOCATION_LOCAL(FIX) \ |
a161fe53 | 41 | (!(FIX)->fx_pcrel \ |
a161fe53 | 42 | || TC_FORCE_RELOCATION (FIX)) |
91cb9803 AM |
43 | #ifndef TC_FORCE_RELOCATION_LOCAL |
44 | #define TC_FORCE_RELOCATION_LOCAL GENERIC_FORCE_RELOCATION_LOCAL | |
a161fe53 AM |
45 | #endif |
46 | ||
91cb9803 AM |
47 | #define GENERIC_FORCE_RELOCATION_SUB_SAME(FIX, SEG) \ |
48 | (!SEG_NORMAL (SEG)) | |
a161fe53 | 49 | #ifndef TC_FORCE_RELOCATION_SUB_SAME |
91cb9803 | 50 | #define TC_FORCE_RELOCATION_SUB_SAME GENERIC_FORCE_RELOCATION_SUB_SAME |
a161fe53 AM |
51 | #endif |
52 | ||
9a97a5d7 AM |
53 | #ifndef md_register_arithmetic |
54 | # define md_register_arithmetic 1 | |
55 | #endif | |
56 | ||
a161fe53 | 57 | #ifndef TC_FORCE_RELOCATION_SUB_ABS |
9a97a5d7 AM |
58 | #define TC_FORCE_RELOCATION_SUB_ABS(FIX, SEG) \ |
59 | (!md_register_arithmetic && (SEG) == reg_section) | |
a161fe53 AM |
60 | #endif |
61 | ||
62 | #ifndef TC_FORCE_RELOCATION_SUB_LOCAL | |
63 | #ifdef DIFF_EXPR_OK | |
5db484ff AM |
64 | #define TC_FORCE_RELOCATION_SUB_LOCAL(FIX, SEG) \ |
65 | (!md_register_arithmetic && (SEG) == reg_section) | |
a161fe53 | 66 | #else |
5db484ff | 67 | #define TC_FORCE_RELOCATION_SUB_LOCAL(FIX, SEG) 1 |
a161fe53 AM |
68 | #endif |
69 | #endif | |
70 | ||
71 | #ifndef TC_VALIDATE_FIX_SUB | |
72 | #ifdef UNDEFINED_DIFFERENCE_OK | |
73 | /* The PA needs this for PIC code generation. */ | |
5db484ff AM |
74 | #define TC_VALIDATE_FIX_SUB(FIX, SEG) \ |
75 | (md_register_arithmetic || (SEG) != reg_section) | |
a161fe53 | 76 | #else |
5db484ff AM |
77 | #define TC_VALIDATE_FIX_SUB(FIX, SEG) \ |
78 | ((md_register_arithmetic || (SEG) != reg_section) \ | |
79 | && ((FIX)->fx_r_type == BFD_RELOC_GPREL32 \ | |
80 | || (FIX)->fx_r_type == BFD_RELOC_GPREL16)) | |
a161fe53 | 81 | #endif |
252b5132 RH |
82 | #endif |
83 | ||
58a77e41 EC |
84 | #ifndef TC_LINKRELAX_FIXUP |
85 | #define TC_LINKRELAX_FIXUP(SEG) 1 | |
86 | #endif | |
87 | ||
a161fe53 AM |
88 | #ifndef MD_APPLY_SYM_VALUE |
89 | #define MD_APPLY_SYM_VALUE(FIX) 1 | |
8f36cd18 | 90 | #endif |
ef99799a | 91 | |
87548816 NC |
92 | #ifndef TC_FINALIZE_SYMS_BEFORE_SIZE_SEG |
93 | #define TC_FINALIZE_SYMS_BEFORE_SIZE_SEG 1 | |
94 | #endif | |
95 | ||
252b5132 | 96 | #ifndef MD_PCREL_FROM_SECTION |
df44284e | 97 | #define MD_PCREL_FROM_SECTION(FIX, SEC) md_pcrel_from (FIX) |
252b5132 RH |
98 | #endif |
99 | ||
c9cd7160 L |
100 | #ifndef TC_FAKE_LABEL |
101 | #define TC_FAKE_LABEL(NAME) (strcmp ((NAME), FAKE_LABEL_NAME) == 0) | |
102 | #endif | |
103 | ||
d31f0f6d AM |
104 | /* Positive values of TC_FX_SIZE_SLACK allow a target to define |
105 | fixups that far past the end of a frag. Having such fixups | |
106 | is of course most most likely a bug in setting fx_size correctly. | |
107 | A negative value disables the fixup check entirely, which is | |
108 | appropriate for something like the Renesas / SuperH SH_COUNT | |
109 | reloc. */ | |
110 | #ifndef TC_FX_SIZE_SLACK | |
111 | #define TC_FX_SIZE_SLACK(FIX) 0 | |
112 | #endif | |
113 | ||
6386f3a7 AM |
114 | /* Used to control final evaluation of expressions. */ |
115 | int finalize_syms = 0; | |
e46d99eb | 116 | |
252b5132 | 117 | int symbol_table_frozen; |
a161fe53 AM |
118 | |
119 | symbolS *abs_section_sym; | |
120 | ||
26346241 AM |
121 | /* Remember the value of dot when parsing expressions. */ |
122 | addressT dot_value; | |
123 | ||
8e723a10 CLT |
124 | /* The frag that dot_value is based from. */ |
125 | fragS *dot_frag; | |
126 | ||
05e9452c AM |
127 | /* Relocs generated by ".reloc" pseudo. */ |
128 | struct reloc_list* reloc_list; | |
129 | ||
d7342424 | 130 | void print_fixup (fixS *); |
252b5132 | 131 | |
252b5132 RH |
132 | /* We generally attach relocs to frag chains. However, after we have |
133 | chained these all together into a segment, any relocs we add after | |
134 | that must be attached to a segment. This will include relocs added | |
135 | in md_estimate_size_for_relax, for example. */ | |
136 | static int frags_chained = 0; | |
252b5132 RH |
137 | |
138 | static int n_fixups; | |
139 | ||
df44284e | 140 | #define RELOC_ENUM enum bfd_reloc_code_real |
df44284e | 141 | |
efaf0ba4 NC |
142 | /* Create a fixS in obstack 'notes'. */ |
143 | ||
252b5132 | 144 | static fixS * |
d7342424 | 145 | fix_new_internal (fragS *frag, /* Which frag? */ |
90bd3c90 AM |
146 | unsigned long where, /* Where in that frag? */ |
147 | unsigned long size, /* 1, 2, or 4 usually. */ | |
d7342424 KH |
148 | symbolS *add_symbol, /* X_add_symbol. */ |
149 | symbolS *sub_symbol, /* X_op_symbol. */ | |
150 | offsetT offset, /* X_add_number. */ | |
151 | int pcrel, /* TRUE if PC-relative relocation. */ | |
032fbb7a | 152 | RELOC_ENUM r_type /* Relocation type. */, |
c865e45b | 153 | int at_beginning) /* Add to the start of the list? */ |
252b5132 RH |
154 | { |
155 | fixS *fixP; | |
156 | ||
157 | n_fixups++; | |
158 | ||
1e9cc1c2 | 159 | fixP = (fixS *) obstack_alloc (¬es, sizeof (fixS)); |
252b5132 RH |
160 | |
161 | fixP->fx_frag = frag; | |
162 | fixP->fx_where = where; | |
163 | fixP->fx_size = size; | |
164 | /* We've made fx_size a narrow field; check that it's wide enough. */ | |
165 | if (fixP->fx_size != size) | |
166 | { | |
90bd3c90 | 167 | as_bad (_("field fx_size too small to hold %lu"), size); |
252b5132 RH |
168 | abort (); |
169 | } | |
170 | fixP->fx_addsy = add_symbol; | |
171 | fixP->fx_subsy = sub_symbol; | |
172 | fixP->fx_offset = offset; | |
26346241 | 173 | fixP->fx_dot_value = dot_value; |
8e723a10 | 174 | fixP->fx_dot_frag = dot_frag; |
252b5132 | 175 | fixP->fx_pcrel = pcrel; |
252b5132 | 176 | fixP->fx_r_type = r_type; |
252b5132 | 177 | fixP->fx_pcrel_adjust = 0; |
252b5132 RH |
178 | fixP->fx_addnumber = 0; |
179 | fixP->fx_tcbit = 0; | |
20ee54e8 | 180 | fixP->fx_tcbit2 = 0; |
252b5132 RH |
181 | fixP->fx_done = 0; |
182 | fixP->fx_no_overflow = 0; | |
183 | fixP->fx_signed = 0; | |
184 | ||
185 | #ifdef USING_CGEN | |
186 | fixP->fx_cgen.insn = NULL; | |
187 | fixP->fx_cgen.opinfo = 0; | |
188 | #endif | |
189 | ||
190 | #ifdef TC_FIX_TYPE | |
efaf0ba4 | 191 | TC_INIT_FIX_DATA (fixP); |
252b5132 RH |
192 | #endif |
193 | ||
3b4dbbbf | 194 | fixP->fx_file = as_where (&fixP->fx_line); |
252b5132 | 195 | |
252b5132 RH |
196 | { |
197 | ||
252b5132 RH |
198 | fixS **seg_fix_rootP = (frags_chained |
199 | ? &seg_info (now_seg)->fix_root | |
200 | : &frchain_now->fix_root); | |
201 | fixS **seg_fix_tailP = (frags_chained | |
202 | ? &seg_info (now_seg)->fix_tail | |
203 | : &frchain_now->fix_tail); | |
252b5132 | 204 | |
c865e45b RS |
205 | if (at_beginning) |
206 | { | |
207 | fixP->fx_next = *seg_fix_rootP; | |
208 | *seg_fix_rootP = fixP; | |
209 | if (fixP->fx_next == NULL) | |
210 | *seg_fix_tailP = fixP; | |
211 | } | |
252b5132 | 212 | else |
c865e45b RS |
213 | { |
214 | fixP->fx_next = NULL; | |
215 | if (*seg_fix_tailP) | |
216 | (*seg_fix_tailP)->fx_next = fixP; | |
217 | else | |
218 | *seg_fix_rootP = fixP; | |
219 | *seg_fix_tailP = fixP; | |
220 | } | |
252b5132 RH |
221 | } |
222 | ||
223 | return fixP; | |
224 | } | |
225 | ||
226 | /* Create a fixup relative to a symbol (plus a constant). */ | |
227 | ||
228 | fixS * | |
90bd3c90 AM |
229 | fix_new (fragS *frag, /* Which frag? */ |
230 | unsigned long where, /* Where in that frag? */ | |
231 | unsigned long size, /* 1, 2, or 4 usually. */ | |
232 | symbolS *add_symbol, /* X_add_symbol. */ | |
d7342424 KH |
233 | offsetT offset, /* X_add_number. */ |
234 | int pcrel, /* TRUE if PC-relative relocation. */ | |
235 | RELOC_ENUM r_type /* Relocation type. */) | |
252b5132 RH |
236 | { |
237 | return fix_new_internal (frag, where, size, add_symbol, | |
5b7c81bd | 238 | (symbolS *) NULL, offset, pcrel, r_type, false); |
252b5132 RH |
239 | } |
240 | ||
241 | /* Create a fixup for an expression. Currently we only support fixups | |
242 | for difference expressions. That is itself more than most object | |
243 | file formats support anyhow. */ | |
244 | ||
245 | fixS * | |
d7342424 | 246 | fix_new_exp (fragS *frag, /* Which frag? */ |
90bd3c90 AM |
247 | unsigned long where, /* Where in that frag? */ |
248 | unsigned long size, /* 1, 2, or 4 usually. */ | |
d7342424 KH |
249 | expressionS *exp, /* Expression. */ |
250 | int pcrel, /* TRUE if PC-relative relocation. */ | |
251 | RELOC_ENUM r_type /* Relocation type. */) | |
252b5132 RH |
252 | { |
253 | symbolS *add = NULL; | |
254 | symbolS *sub = NULL; | |
255 | offsetT off = 0; | |
256 | ||
257 | switch (exp->X_op) | |
258 | { | |
259 | case O_absent: | |
260 | break; | |
261 | ||
37006e43 NC |
262 | case O_register: |
263 | as_bad (_("register value used as expression")); | |
264 | break; | |
265 | ||
252b5132 RH |
266 | case O_add: |
267 | /* This comes up when _GLOBAL_OFFSET_TABLE_+(.-L0) is read, if | |
268 | the difference expression cannot immediately be reduced. */ | |
269 | { | |
270 | symbolS *stmp = make_expr_symbol (exp); | |
58a77e41 | 271 | |
252b5132 RH |
272 | exp->X_op = O_symbol; |
273 | exp->X_op_symbol = 0; | |
274 | exp->X_add_symbol = stmp; | |
275 | exp->X_add_number = 0; | |
58a77e41 | 276 | |
252b5132 RH |
277 | return fix_new_exp (frag, where, size, exp, pcrel, r_type); |
278 | } | |
279 | ||
280 | case O_symbol_rva: | |
281 | add = exp->X_add_symbol; | |
282 | off = exp->X_add_number; | |
252b5132 | 283 | r_type = BFD_RELOC_RVA; |
252b5132 RH |
284 | break; |
285 | ||
286 | case O_uminus: | |
287 | sub = exp->X_add_symbol; | |
288 | off = exp->X_add_number; | |
289 | break; | |
290 | ||
291 | case O_subtract: | |
292 | sub = exp->X_op_symbol; | |
293 | /* Fall through. */ | |
294 | case O_symbol: | |
295 | add = exp->X_add_symbol; | |
efaf0ba4 | 296 | /* Fall through. */ |
252b5132 RH |
297 | case O_constant: |
298 | off = exp->X_add_number; | |
299 | break; | |
300 | ||
301 | default: | |
302 | add = make_expr_symbol (exp); | |
303 | break; | |
304 | } | |
305 | ||
c865e45b | 306 | return fix_new_internal (frag, where, size, add, sub, off, pcrel, |
5b7c81bd | 307 | r_type, false); |
c865e45b RS |
308 | } |
309 | ||
310 | /* Create a fixup at the beginning of FRAG. The arguments are the same | |
311 | as for fix_new, except that WHERE is implicitly 0. */ | |
312 | ||
313 | fixS * | |
90bd3c90 | 314 | fix_at_start (fragS *frag, unsigned long size, symbolS *add_symbol, |
c865e45b RS |
315 | offsetT offset, int pcrel, RELOC_ENUM r_type) |
316 | { | |
317 | return fix_new_internal (frag, 0, size, add_symbol, | |
5b7c81bd | 318 | (symbolS *) NULL, offset, pcrel, r_type, true); |
252b5132 RH |
319 | } |
320 | ||
ae6063d4 AM |
321 | /* Generic function to determine whether a fixup requires a relocation. */ |
322 | int | |
d7342424 | 323 | generic_force_reloc (fixS *fix) |
ae6063d4 | 324 | { |
ae6063d4 AM |
325 | if (fix->fx_r_type == BFD_RELOC_VTABLE_INHERIT |
326 | || fix->fx_r_type == BFD_RELOC_VTABLE_ENTRY) | |
327 | return 1; | |
7be1c489 | 328 | |
61e192bf NC |
329 | if (fix->fx_addsy == NULL) |
330 | return 0; | |
331 | ||
ae6063d4 AM |
332 | return S_FORCE_RELOC (fix->fx_addsy, fix->fx_subsy == NULL); |
333 | } | |
334 | ||
252b5132 RH |
335 | /* Append a string onto another string, bumping the pointer along. */ |
336 | void | |
d7342424 | 337 | append (char **charPP, char *fromP, unsigned long length) |
252b5132 | 338 | { |
efaf0ba4 | 339 | /* Don't trust memcpy() of 0 chars. */ |
252b5132 RH |
340 | if (length == 0) |
341 | return; | |
342 | ||
343 | memcpy (*charPP, fromP, length); | |
344 | *charPP += length; | |
345 | } | |
346 | ||
efaf0ba4 NC |
347 | /* This routine records the largest alignment seen for each segment. |
348 | If the beginning of the segment is aligned on the worst-case | |
349 | boundary, all of the other alignments within it will work. At | |
350 | least one object format really uses this info. */ | |
351 | ||
252b5132 | 352 | void |
d7342424 KH |
353 | record_alignment (/* Segment to which alignment pertains. */ |
354 | segT seg, | |
355 | /* Alignment, as a power of 2 (e.g., 1 => 2-byte | |
356 | boundary, 2 => 4-byte boundary, etc.) */ | |
9136aa49 | 357 | unsigned int align) |
252b5132 RH |
358 | { |
359 | if (seg == absolute_section) | |
360 | return; | |
7be1c489 | 361 | |
fd361982 AM |
362 | if (align > bfd_section_alignment (seg)) |
363 | bfd_set_section_alignment (seg, align); | |
252b5132 RH |
364 | } |
365 | ||
0a9ef439 | 366 | int |
d7342424 | 367 | get_recorded_alignment (segT seg) |
0a9ef439 RH |
368 | { |
369 | if (seg == absolute_section) | |
370 | return 0; | |
7be1c489 | 371 | |
fd361982 | 372 | return bfd_section_alignment (seg); |
0a9ef439 RH |
373 | } |
374 | ||
252b5132 RH |
375 | /* Reset the section indices after removing the gas created sections. */ |
376 | ||
377 | static void | |
e7ff5c73 | 378 | renumber_sections (bfd *abfd ATTRIBUTE_UNUSED, asection *sec, void *countparg) |
252b5132 RH |
379 | { |
380 | int *countp = (int *) countparg; | |
381 | ||
382 | sec->index = *countp; | |
383 | ++*countp; | |
384 | } | |
385 | ||
252b5132 | 386 | static fragS * |
d7342424 | 387 | chain_frchains_together_1 (segT section, struct frchain *frchp) |
252b5132 RH |
388 | { |
389 | fragS dummy, *prev_frag = &dummy; | |
252b5132 | 390 | fixS fix_dummy, *prev_fix = &fix_dummy; |
252b5132 | 391 | |
c9049d30 | 392 | for (; frchp; frchp = frchp->frch_next) |
252b5132 RH |
393 | { |
394 | prev_frag->fr_next = frchp->frch_root; | |
395 | prev_frag = frchp->frch_last; | |
9c2799c2 | 396 | gas_assert (prev_frag->fr_type != 0); |
252b5132 RH |
397 | if (frchp->fix_root != (fixS *) NULL) |
398 | { | |
399 | if (seg_info (section)->fix_root == (fixS *) NULL) | |
400 | seg_info (section)->fix_root = frchp->fix_root; | |
401 | prev_fix->fx_next = frchp->fix_root; | |
402 | seg_info (section)->fix_tail = frchp->fix_tail; | |
403 | prev_fix = frchp->fix_tail; | |
404 | } | |
252b5132 | 405 | } |
4fc0b46e AM |
406 | gas_assert (prev_frag != &dummy |
407 | && prev_frag->fr_type != 0); | |
252b5132 RH |
408 | prev_frag->fr_next = 0; |
409 | return prev_frag; | |
410 | } | |
411 | ||
252b5132 | 412 | static void |
d7342424 KH |
413 | chain_frchains_together (bfd *abfd ATTRIBUTE_UNUSED, |
414 | segT section, | |
e7ff5c73 | 415 | void *xxx ATTRIBUTE_UNUSED) |
252b5132 RH |
416 | { |
417 | segment_info_type *info; | |
418 | ||
419 | /* BFD may have introduced its own sections without using | |
420 | subseg_new, so it is possible that seg_info is NULL. */ | |
421 | info = seg_info (section); | |
422 | if (info != (segment_info_type *) NULL) | |
efaf0ba4 NC |
423 | info->frchainP->frch_last |
424 | = chain_frchains_together_1 (section, info->frchainP); | |
252b5132 RH |
425 | |
426 | /* Now that we've chained the frags together, we must add new fixups | |
427 | to the segment, not to the frag chain. */ | |
428 | frags_chained = 1; | |
429 | } | |
430 | ||
252b5132 | 431 | static void |
d7342424 | 432 | cvt_frag_to_fill (segT sec ATTRIBUTE_UNUSED, fragS *fragP) |
252b5132 RH |
433 | { |
434 | switch (fragP->fr_type) | |
435 | { | |
62a02d25 L |
436 | case rs_space_nop: |
437 | goto skip_align; | |
252b5132 RH |
438 | case rs_align: |
439 | case rs_align_code: | |
0a9ef439 | 440 | case rs_align_test: |
252b5132 RH |
441 | case rs_org: |
442 | case rs_space: | |
443 | #ifdef HANDLE_ALIGN | |
444 | HANDLE_ALIGN (fragP); | |
445 | #endif | |
dc1e8a47 | 446 | skip_align: |
252b5132 RH |
447 | know (fragP->fr_next != NULL); |
448 | fragP->fr_offset = (fragP->fr_next->fr_address | |
449 | - fragP->fr_address | |
450 | - fragP->fr_fix) / fragP->fr_var; | |
451 | if (fragP->fr_offset < 0) | |
452 | { | |
14ad458a | 453 | as_bad_where (fragP->fr_file, fragP->fr_line, |
8f065d3b | 454 | _("attempt to .org/.space/.nops backwards? (%ld)"), |
14ad458a | 455 | (long) fragP->fr_offset); |
3f3cdb03 | 456 | fragP->fr_offset = 0; |
252b5132 | 457 | } |
62a02d25 L |
458 | if (fragP->fr_type == rs_space_nop) |
459 | fragP->fr_type = rs_fill_nop; | |
460 | else | |
461 | fragP->fr_type = rs_fill; | |
252b5132 RH |
462 | break; |
463 | ||
464 | case rs_fill: | |
62a02d25 | 465 | case rs_fill_nop: |
252b5132 RH |
466 | break; |
467 | ||
468 | case rs_leb128: | |
469 | { | |
470 | valueT value = S_GET_VALUE (fragP->fr_symbol); | |
471 | int size; | |
472 | ||
ba8826a8 AO |
473 | if (!S_IS_DEFINED (fragP->fr_symbol)) |
474 | { | |
475 | as_bad_where (fragP->fr_file, fragP->fr_line, | |
476 | _("leb128 operand is an undefined symbol: %s"), | |
477 | S_GET_NAME (fragP->fr_symbol)); | |
478 | } | |
479 | ||
252b5132 RH |
480 | size = output_leb128 (fragP->fr_literal + fragP->fr_fix, value, |
481 | fragP->fr_subtype); | |
482 | ||
483 | fragP->fr_fix += size; | |
484 | fragP->fr_type = rs_fill; | |
485 | fragP->fr_var = 0; | |
486 | fragP->fr_offset = 0; | |
487 | fragP->fr_symbol = NULL; | |
488 | } | |
489 | break; | |
490 | ||
491 | case rs_cfa: | |
492 | eh_frame_convert_frag (fragP); | |
493 | break; | |
494 | ||
220e750f RH |
495 | case rs_dwarf2dbg: |
496 | dwarf2dbg_convert_frag (fragP); | |
497 | break; | |
498 | ||
252b5132 | 499 | case rs_machine_dependent: |
252b5132 | 500 | md_convert_frag (stdoutput, sec, fragP); |
252b5132 | 501 | |
9c2799c2 | 502 | gas_assert (fragP->fr_next == NULL |
871a6bd2 AM |
503 | || (fragP->fr_next->fr_address - fragP->fr_address |
504 | == fragP->fr_fix)); | |
252b5132 | 505 | |
efaf0ba4 NC |
506 | /* After md_convert_frag, we make the frag into a ".space 0". |
507 | md_convert_frag() should set up any fixSs and constants | |
508 | required. */ | |
252b5132 RH |
509 | frag_wane (fragP); |
510 | break; | |
511 | ||
512 | #ifndef WORKING_DOT_WORD | |
513 | case rs_broken_word: | |
514 | { | |
515 | struct broken_word *lie; | |
516 | ||
517 | if (fragP->fr_subtype) | |
518 | { | |
519 | fragP->fr_fix += md_short_jump_size; | |
520 | for (lie = (struct broken_word *) (fragP->fr_symbol); | |
521 | lie && lie->dispfrag == fragP; | |
522 | lie = lie->next_broken_word) | |
523 | if (lie->added == 1) | |
524 | fragP->fr_fix += md_long_jump_size; | |
525 | } | |
526 | frag_wane (fragP); | |
527 | } | |
528 | break; | |
529 | #endif | |
530 | ||
531 | default: | |
532 | BAD_CASE (fragP->fr_type); | |
533 | break; | |
534 | } | |
09b935ac AM |
535 | #ifdef md_frag_check |
536 | md_frag_check (fragP); | |
537 | #endif | |
252b5132 RH |
538 | } |
539 | ||
32638454 AM |
540 | struct relax_seg_info |
541 | { | |
542 | int pass; | |
543 | int changed; | |
544 | }; | |
d7342424 | 545 | |
252b5132 | 546 | static void |
32638454 | 547 | relax_seg (bfd *abfd ATTRIBUTE_UNUSED, asection *sec, void *xxx) |
e46d99eb AM |
548 | { |
549 | segment_info_type *seginfo = seg_info (sec); | |
32638454 | 550 | struct relax_seg_info *info = (struct relax_seg_info *) xxx; |
e46d99eb AM |
551 | |
552 | if (seginfo && seginfo->frchainP | |
32638454 AM |
553 | && relax_segment (seginfo->frchainP->frch_root, sec, info->pass)) |
554 | info->changed = 1; | |
e46d99eb AM |
555 | } |
556 | ||
e46d99eb | 557 | static void |
fd361982 | 558 | size_seg (bfd *abfd ATTRIBUTE_UNUSED, asection *sec, void *xxx ATTRIBUTE_UNUSED) |
252b5132 RH |
559 | { |
560 | flagword flags; | |
561 | fragS *fragp; | |
562 | segment_info_type *seginfo; | |
563 | int x; | |
564 | valueT size, newsize; | |
565 | ||
566 | subseg_change (sec, 0); | |
567 | ||
252b5132 RH |
568 | seginfo = seg_info (sec); |
569 | if (seginfo && seginfo->frchainP) | |
570 | { | |
252b5132 RH |
571 | for (fragp = seginfo->frchainP->frch_root; fragp; fragp = fragp->fr_next) |
572 | cvt_frag_to_fill (sec, fragp); | |
573 | for (fragp = seginfo->frchainP->frch_root; | |
574 | fragp->fr_next; | |
575 | fragp = fragp->fr_next) | |
efaf0ba4 NC |
576 | /* Walk to last elt. */ |
577 | ; | |
252b5132 RH |
578 | size = fragp->fr_address + fragp->fr_fix; |
579 | } | |
580 | else | |
581 | size = 0; | |
582 | ||
fd361982 AM |
583 | flags = bfd_section_flags (sec); |
584 | if (size == 0 && bfd_section_size (sec) != 0 && | |
f3d2b04b KT |
585 | (flags & SEC_HAS_CONTENTS) != 0) |
586 | return; | |
e46d99eb | 587 | |
252b5132 RH |
588 | if (size > 0 && ! seginfo->bss) |
589 | flags |= SEC_HAS_CONTENTS; | |
590 | ||
e5435dec | 591 | flags &= ~SEC_RELOC; |
fd361982 | 592 | x = bfd_set_section_flags (sec, flags); |
9c2799c2 | 593 | gas_assert (x); |
252b5132 | 594 | |
2edb36e7 NC |
595 | /* If permitted, allow the backend to pad out the section |
596 | to some alignment boundary. */ | |
597 | if (do_not_pad_sections_to_alignment) | |
598 | newsize = size; | |
599 | else | |
600 | newsize = md_section_align (sec, size); | |
fd361982 | 601 | x = bfd_set_section_size (sec, newsize); |
9c2799c2 | 602 | gas_assert (x); |
252b5132 RH |
603 | |
604 | /* If the size had to be rounded up, add some padding in the last | |
605 | non-empty frag. */ | |
9c2799c2 | 606 | gas_assert (newsize >= size); |
252b5132 RH |
607 | if (size != newsize) |
608 | { | |
609 | fragS *last = seginfo->frchainP->frch_last; | |
610 | fragp = seginfo->frchainP->frch_root; | |
611 | while (fragp->fr_next != last) | |
612 | fragp = fragp->fr_next; | |
613 | last->fr_address = size; | |
18e1d487 AM |
614 | if ((newsize - size) % fragp->fr_var == 0) |
615 | fragp->fr_offset += (newsize - size) / fragp->fr_var; | |
616 | else | |
617 | /* If we hit this abort, it's likely due to subsegs_finish not | |
618 | providing sufficient alignment on the last frag, and the | |
619 | machine dependent code using alignment frags with fr_var | |
620 | greater than 1. */ | |
621 | abort (); | |
252b5132 RH |
622 | } |
623 | ||
624 | #ifdef tc_frob_section | |
625 | tc_frob_section (sec); | |
626 | #endif | |
627 | #ifdef obj_frob_section | |
628 | obj_frob_section (sec); | |
629 | #endif | |
630 | } | |
631 | ||
632 | #ifdef DEBUG2 | |
633 | static void | |
988392e2 | 634 | dump_section_relocs (bfd *abfd ATTRIBUTE_UNUSED, asection *sec, FILE *stream) |
252b5132 | 635 | { |
252b5132 RH |
636 | segment_info_type *seginfo = seg_info (sec); |
637 | fixS *fixp = seginfo->fix_root; | |
638 | ||
639 | if (!fixp) | |
640 | return; | |
641 | ||
642 | fprintf (stream, "sec %s relocs:\n", sec->name); | |
643 | while (fixp) | |
644 | { | |
645 | symbolS *s = fixp->fx_addsy; | |
e723ef7c ILT |
646 | |
647 | fprintf (stream, " %08lx: type %d ", (unsigned long) fixp, | |
648 | (int) fixp->fx_r_type); | |
649 | if (s == NULL) | |
650 | fprintf (stream, "no sym\n"); | |
651 | else | |
252b5132 | 652 | { |
e723ef7c ILT |
653 | print_symbol_value_1 (stream, s); |
654 | fprintf (stream, "\n"); | |
252b5132 | 655 | } |
252b5132 RH |
656 | fixp = fixp->fx_next; |
657 | } | |
658 | } | |
659 | #else | |
660 | #define dump_section_relocs(ABFD,SEC,STREAM) ((void) 0) | |
661 | #endif | |
662 | ||
663 | #ifndef EMIT_SECTION_SYMBOLS | |
664 | #define EMIT_SECTION_SYMBOLS 1 | |
665 | #endif | |
666 | ||
05e9452c AM |
667 | /* Resolve U.A.OFFSET_SYM and U.A.SYM fields of RELOC_LIST entries, |
668 | and check for validity. Convert RELOC_LIST from using U.A fields | |
669 | to U.B fields. */ | |
670 | static void | |
671 | resolve_reloc_expr_symbols (void) | |
672 | { | |
080f9e4f | 673 | bfd_vma addr_mask = 1; |
05e9452c AM |
674 | struct reloc_list *r; |
675 | ||
080f9e4f MR |
676 | /* Avoid a shift by the width of type. */ |
677 | addr_mask <<= bfd_arch_bits_per_address (stdoutput) - 1; | |
678 | addr_mask <<= 1; | |
679 | addr_mask -= 1; | |
680 | ||
05e9452c AM |
681 | for (r = reloc_list; r; r = r->next) |
682 | { | |
080f9e4f | 683 | reloc_howto_type *howto = r->u.a.howto; |
05e9452c AM |
684 | expressionS *symval; |
685 | symbolS *sym; | |
686 | bfd_vma offset, addend; | |
687 | asection *sec; | |
05e9452c AM |
688 | |
689 | resolve_symbol_value (r->u.a.offset_sym); | |
690 | symval = symbol_get_value_expression (r->u.a.offset_sym); | |
691 | ||
692 | offset = 0; | |
693 | sym = NULL; | |
694 | if (symval->X_op == O_constant) | |
695 | sym = r->u.a.offset_sym; | |
696 | else if (symval->X_op == O_symbol) | |
697 | { | |
698 | sym = symval->X_add_symbol; | |
699 | offset = symval->X_add_number; | |
700 | symval = symbol_get_value_expression (symval->X_add_symbol); | |
701 | } | |
702 | if (sym == NULL | |
703 | || symval->X_op != O_constant | |
704 | || (sec = S_GET_SEGMENT (sym)) == NULL | |
705 | || !SEG_NORMAL (sec)) | |
706 | { | |
707 | as_bad_where (r->file, r->line, _("invalid offset expression")); | |
708 | sec = NULL; | |
709 | } | |
710 | else | |
711 | offset += S_GET_VALUE (sym); | |
712 | ||
713 | sym = NULL; | |
714 | addend = r->u.a.addend; | |
715 | if (r->u.a.sym != NULL) | |
716 | { | |
717 | resolve_symbol_value (r->u.a.sym); | |
718 | symval = symbol_get_value_expression (r->u.a.sym); | |
719 | if (symval->X_op == O_constant) | |
720 | sym = r->u.a.sym; | |
721 | else if (symval->X_op == O_symbol) | |
722 | { | |
723 | sym = symval->X_add_symbol; | |
724 | addend += symval->X_add_number; | |
725 | symval = symbol_get_value_expression (symval->X_add_symbol); | |
726 | } | |
727 | if (symval->X_op != O_constant) | |
728 | { | |
729 | as_bad_where (r->file, r->line, _("invalid reloc expression")); | |
730 | sec = NULL; | |
731 | } | |
2578f2f3 | 732 | else if (sym != NULL && sec != NULL) |
7230378d | 733 | { |
080f9e4f MR |
734 | /* Convert relocs against local symbols to refer to the |
735 | corresponding section symbol plus offset instead. Keep | |
736 | PC-relative relocs of the REL variety intact though to | |
737 | prevent the offset from overflowing the relocated field, | |
738 | unless it has enough bits to cover the whole address | |
739 | space. */ | |
68fcee4f AM |
740 | if (S_IS_LOCAL (sym) |
741 | && S_IS_DEFINED (sym) | |
742 | && !symbol_section_p (sym) | |
d6101ac2 MR |
743 | && (sec->use_rela_p |
744 | || (howto->partial_inplace | |
745 | && (!howto->pc_relative | |
746 | || howto->src_mask == addr_mask)))) | |
7230378d AM |
747 | { |
748 | asection *symsec = S_GET_SEGMENT (sym); | |
749 | if (!(((symsec->flags & SEC_MERGE) != 0 | |
750 | && addend != 0) | |
751 | || (symsec->flags & SEC_THREAD_LOCAL) != 0)) | |
752 | { | |
753 | addend += S_GET_VALUE (sym); | |
754 | sym = section_symbol (symsec); | |
755 | } | |
756 | } | |
757 | symbol_mark_used_in_reloc (sym); | |
758 | } | |
05e9452c AM |
759 | } |
760 | if (sym == NULL) | |
761 | { | |
762 | if (abs_section_sym == NULL) | |
763 | abs_section_sym = section_symbol (absolute_section); | |
764 | sym = abs_section_sym; | |
765 | } | |
766 | ||
05e9452c AM |
767 | r->u.b.sec = sec; |
768 | r->u.b.s = symbol_get_bfdsym (sym); | |
769 | r->u.b.r.sym_ptr_ptr = &r->u.b.s; | |
770 | r->u.b.r.address = offset; | |
771 | r->u.b.r.addend = addend; | |
772 | r->u.b.r.howto = howto; | |
773 | } | |
774 | } | |
775 | ||
df44284e AM |
776 | /* This pass over fixups decides whether symbols can be replaced with |
777 | section symbols. */ | |
778 | ||
252b5132 | 779 | static void |
d7342424 KH |
780 | adjust_reloc_syms (bfd *abfd ATTRIBUTE_UNUSED, |
781 | asection *sec, | |
e7ff5c73 | 782 | void *xxx ATTRIBUTE_UNUSED) |
252b5132 RH |
783 | { |
784 | segment_info_type *seginfo = seg_info (sec); | |
785 | fixS *fixp; | |
786 | ||
787 | if (seginfo == NULL) | |
788 | return; | |
789 | ||
790 | dump_section_relocs (abfd, sec, stderr); | |
791 | ||
792 | for (fixp = seginfo->fix_root; fixp; fixp = fixp->fx_next) | |
793 | if (fixp->fx_done) | |
efaf0ba4 NC |
794 | /* Ignore it. */ |
795 | ; | |
252b5132 RH |
796 | else if (fixp->fx_addsy) |
797 | { | |
798 | symbolS *sym; | |
799 | asection *symsec; | |
800 | ||
801 | #ifdef DEBUG5 | |
802 | fprintf (stderr, "\n\nadjusting fixup:\n"); | |
803 | print_fixup (fixp); | |
804 | #endif | |
805 | ||
806 | sym = fixp->fx_addsy; | |
807 | ||
808 | /* All symbols should have already been resolved at this | |
809 | point. It is possible to see unresolved expression | |
810 | symbols, though, since they are not in the regular symbol | |
811 | table. */ | |
df44284e | 812 | resolve_symbol_value (sym); |
efaf0ba4 | 813 | |
49309057 | 814 | if (fixp->fx_subsy != NULL) |
6386f3a7 | 815 | resolve_symbol_value (fixp->fx_subsy); |
252b5132 | 816 | |
60938e80 L |
817 | /* If this symbol is equated to an undefined or common symbol, |
818 | convert the fixup to being against that symbol. */ | |
b4b24b79 AM |
819 | while (symbol_equated_reloc_p (sym) |
820 | || S_IS_WEAKREFR (sym)) | |
252b5132 | 821 | { |
b4b24b79 AM |
822 | symbolS *newsym = symbol_get_value_expression (sym)->X_add_symbol; |
823 | if (sym == newsym) | |
824 | break; | |
49309057 | 825 | fixp->fx_offset += symbol_get_value_expression (sym)->X_add_number; |
b4b24b79 AM |
826 | fixp->fx_addsy = newsym; |
827 | sym = newsym; | |
252b5132 RH |
828 | } |
829 | ||
df44284e | 830 | if (symbol_mri_common_p (sym)) |
252b5132 | 831 | { |
b4b24b79 AM |
832 | fixp->fx_offset += S_GET_VALUE (sym); |
833 | fixp->fx_addsy = symbol_get_value_expression (sym)->X_add_symbol; | |
df44284e | 834 | continue; |
252b5132 RH |
835 | } |
836 | ||
a161fe53 AM |
837 | /* If the symbol is undefined, common, weak, or global (ELF |
838 | shared libs), we can't replace it with the section symbol. */ | |
ae6063d4 | 839 | if (S_FORCE_RELOC (fixp->fx_addsy, 1)) |
a161fe53 AM |
840 | continue; |
841 | ||
842 | /* Is there some other (target cpu dependent) reason we can't adjust | |
843 | this one? (E.g. relocations involving function addresses on | |
844 | the PA. */ | |
845 | #ifdef tc_fix_adjustable | |
846 | if (! tc_fix_adjustable (fixp)) | |
847 | continue; | |
848 | #endif | |
849 | ||
850 | /* Since we're reducing to section symbols, don't attempt to reduce | |
851 | anything that's already using one. */ | |
852 | if (symbol_section_p (sym)) | |
d1bcae83 L |
853 | { |
854 | /* Mark the section symbol used in relocation so that it will | |
855 | be included in the symbol table. */ | |
856 | symbol_mark_used_in_reloc (sym); | |
857 | continue; | |
858 | } | |
a161fe53 | 859 | |
252b5132 | 860 | symsec = S_GET_SEGMENT (sym); |
252b5132 RH |
861 | if (symsec == NULL) |
862 | abort (); | |
efaf0ba4 | 863 | |
a841bdf5 AM |
864 | if (bfd_is_abs_section (symsec) |
865 | || symsec == reg_section) | |
252b5132 | 866 | { |
a161fe53 | 867 | /* The fixup_segment routine normally will not use this |
b4b24b79 | 868 | symbol in a relocation. */ |
df44284e | 869 | continue; |
252b5132 RH |
870 | } |
871 | ||
7565ed77 | 872 | /* Don't try to reduce relocs which refer to non-local symbols |
b4b24b79 AM |
873 | in .linkonce sections. It can lead to confusion when a |
874 | debugging section refers to a .linkonce section. I hope | |
875 | this will always be correct. */ | |
7565ed77 | 876 | if (symsec != sec && ! S_IS_LOCAL (sym)) |
252b5132 | 877 | { |
a161fe53 AM |
878 | if ((symsec->flags & SEC_LINK_ONCE) != 0 |
879 | || (IS_ELF | |
880 | /* The GNU toolchain uses an extension for ELF: a | |
881 | section beginning with the magic string | |
882 | .gnu.linkonce is a linkonce section. */ | |
d34049e8 | 883 | && startswith (segment_name (symsec), ".gnu.linkonce"))) |
a161fe53 | 884 | continue; |
252b5132 | 885 | } |
f7460f5f JJ |
886 | |
887 | /* Never adjust a reloc against local symbol in a merge section | |
888 | with non-zero addend. */ | |
5045ec7a AM |
889 | if ((symsec->flags & SEC_MERGE) != 0 |
890 | && (fixp->fx_offset != 0 || fixp->fx_subsy != NULL)) | |
a161fe53 | 891 | continue; |
13ae64f3 JJ |
892 | |
893 | /* Never adjust a reloc against TLS local symbol. */ | |
df44284e | 894 | if ((symsec->flags & SEC_THREAD_LOCAL) != 0) |
a161fe53 | 895 | continue; |
252b5132 | 896 | |
a161fe53 | 897 | /* We refetch the segment when calling section_symbol, rather |
252b5132 | 898 | than using symsec, because S_GET_VALUE may wind up changing |
efaf0ba4 | 899 | the section when it calls resolve_symbol_value. */ |
252b5132 RH |
900 | fixp->fx_offset += S_GET_VALUE (sym); |
901 | fixp->fx_addsy = section_symbol (S_GET_SEGMENT (sym)); | |
e723ef7c ILT |
902 | #ifdef DEBUG5 |
903 | fprintf (stderr, "\nadjusted fixup:\n"); | |
904 | print_fixup (fixp); | |
905 | #endif | |
252b5132 | 906 | } |
252b5132 RH |
907 | |
908 | dump_section_relocs (abfd, sec, stderr); | |
909 | } | |
910 | ||
e7ff5c73 AM |
911 | /* fixup_segment() |
912 | ||
913 | Go through all the fixS's in a segment and see which ones can be | |
914 | handled now. (These consist of fixS where we have since discovered | |
915 | the value of a symbol, or the address of the frag involved.) | |
916 | For each one, call md_apply_fix to put the fix into the frag data. | |
89d67ed9 AM |
917 | Ones that we couldn't completely handle here will be output later |
918 | by emit_relocations. */ | |
e7ff5c73 | 919 | |
89d67ed9 | 920 | static void |
e7ff5c73 AM |
921 | fixup_segment (fixS *fixP, segT this_segment) |
922 | { | |
e7ff5c73 AM |
923 | valueT add_number; |
924 | fragS *fragP; | |
e7ff5c73 AM |
925 | |
926 | if (fixP != NULL && abs_section_sym == NULL) | |
927 | abs_section_sym = section_symbol (absolute_section); | |
928 | ||
929 | /* If the linker is doing the relaxing, we must not do any fixups. | |
930 | ||
931 | Well, strictly speaking that's not true -- we could do any that | |
a8eb42a8 | 932 | are PC-relative and don't cross regions that could change size. */ |
e7ff5c73 AM |
933 | if (linkrelax && TC_LINKRELAX_FIXUP (this_segment)) |
934 | { | |
935 | for (; fixP; fixP = fixP->fx_next) | |
936 | if (!fixP->fx_done) | |
937 | { | |
938 | if (fixP->fx_addsy == NULL) | |
939 | { | |
940 | /* There was no symbol required by this relocation. | |
941 | However, BFD doesn't really handle relocations | |
942 | without symbols well. So fake up a local symbol in | |
943 | the absolute section. */ | |
944 | fixP->fx_addsy = abs_section_sym; | |
945 | } | |
946 | symbol_mark_used_in_reloc (fixP->fx_addsy); | |
947 | if (fixP->fx_subsy != NULL) | |
948 | symbol_mark_used_in_reloc (fixP->fx_subsy); | |
e7ff5c73 | 949 | } |
89d67ed9 | 950 | return; |
e7ff5c73 AM |
951 | } |
952 | ||
953 | for (; fixP; fixP = fixP->fx_next) | |
954 | { | |
da0835ae JB |
955 | segT add_symbol_segment = absolute_section; |
956 | ||
e7ff5c73 AM |
957 | #ifdef DEBUG5 |
958 | fprintf (stderr, "\nprocessing fixup:\n"); | |
959 | print_fixup (fixP); | |
960 | #endif | |
961 | ||
962 | fragP = fixP->fx_frag; | |
963 | know (fragP); | |
964 | #ifdef TC_VALIDATE_FIX | |
965 | TC_VALIDATE_FIX (fixP, this_segment, skip); | |
966 | #endif | |
967 | add_number = fixP->fx_offset; | |
968 | ||
e7ff5c73 AM |
969 | if (fixP->fx_addsy != NULL) |
970 | add_symbol_segment = S_GET_SEGMENT (fixP->fx_addsy); | |
971 | ||
972 | if (fixP->fx_subsy != NULL) | |
973 | { | |
974 | segT sub_symbol_segment; | |
975 | resolve_symbol_value (fixP->fx_subsy); | |
976 | sub_symbol_segment = S_GET_SEGMENT (fixP->fx_subsy); | |
977 | if (fixP->fx_addsy != NULL | |
978 | && sub_symbol_segment == add_symbol_segment | |
c969da64 RS |
979 | && !S_FORCE_RELOC (fixP->fx_addsy, 0) |
980 | && !S_FORCE_RELOC (fixP->fx_subsy, 0) | |
e7ff5c73 AM |
981 | && !TC_FORCE_RELOCATION_SUB_SAME (fixP, add_symbol_segment)) |
982 | { | |
983 | add_number += S_GET_VALUE (fixP->fx_addsy); | |
984 | add_number -= S_GET_VALUE (fixP->fx_subsy); | |
985 | fixP->fx_offset = add_number; | |
986 | fixP->fx_addsy = NULL; | |
987 | fixP->fx_subsy = NULL; | |
988 | #ifdef TC_M68K | |
989 | /* See the comment below about 68k weirdness. */ | |
990 | fixP->fx_pcrel = 0; | |
991 | #endif | |
992 | } | |
993 | else if (sub_symbol_segment == absolute_section | |
c969da64 | 994 | && !S_FORCE_RELOC (fixP->fx_subsy, 0) |
9a97a5d7 | 995 | && !TC_FORCE_RELOCATION_SUB_ABS (fixP, add_symbol_segment)) |
e7ff5c73 AM |
996 | { |
997 | add_number -= S_GET_VALUE (fixP->fx_subsy); | |
998 | fixP->fx_offset = add_number; | |
999 | fixP->fx_subsy = NULL; | |
1000 | } | |
1001 | else if (sub_symbol_segment == this_segment | |
c969da64 | 1002 | && !S_FORCE_RELOC (fixP->fx_subsy, 0) |
5db484ff | 1003 | && !TC_FORCE_RELOCATION_SUB_LOCAL (fixP, add_symbol_segment)) |
e7ff5c73 AM |
1004 | { |
1005 | add_number -= S_GET_VALUE (fixP->fx_subsy); | |
1006 | fixP->fx_offset = (add_number + fixP->fx_dot_value | |
8e723a10 | 1007 | + fixP->fx_dot_frag->fr_address); |
e7ff5c73 AM |
1008 | |
1009 | /* Make it pc-relative. If the back-end code has not | |
1010 | selected a pc-relative reloc, cancel the adjustment | |
1011 | we do later on all pc-relative relocs. */ | |
1012 | if (0 | |
1013 | #ifdef TC_M68K | |
1014 | /* Do this for m68k even if it's already described | |
1015 | as pc-relative. On the m68k, an operand of | |
1016 | "pc@(foo-.-2)" should address "foo" in a | |
1017 | pc-relative mode. */ | |
1018 | || 1 | |
1019 | #endif | |
1020 | || !fixP->fx_pcrel) | |
1021 | add_number += MD_PCREL_FROM_SECTION (fixP, this_segment); | |
1022 | fixP->fx_subsy = NULL; | |
1023 | fixP->fx_pcrel = 1; | |
1024 | } | |
586ec8c1 | 1025 | else if (!TC_VALIDATE_FIX_SUB (fixP, add_symbol_segment)) |
e7ff5c73 | 1026 | { |
9a97a5d7 AM |
1027 | if (!md_register_arithmetic |
1028 | && (add_symbol_segment == reg_section | |
1029 | || sub_symbol_segment == reg_section)) | |
1030 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
1031 | _("register value used as expression")); | |
1032 | else | |
1033 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
1034 | _("can't resolve `%s' {%s section} - `%s' {%s section}"), | |
1035 | fixP->fx_addsy ? S_GET_NAME (fixP->fx_addsy) : "0", | |
1036 | segment_name (add_symbol_segment), | |
1037 | S_GET_NAME (fixP->fx_subsy), | |
1038 | segment_name (sub_symbol_segment)); | |
e7ff5c73 | 1039 | } |
586ec8c1 NC |
1040 | else if (sub_symbol_segment != undefined_section |
1041 | && ! bfd_is_com_section (sub_symbol_segment) | |
1042 | && MD_APPLY_SYM_VALUE (fixP)) | |
1043 | add_number -= S_GET_VALUE (fixP->fx_subsy); | |
e7ff5c73 AM |
1044 | } |
1045 | ||
1046 | if (fixP->fx_addsy) | |
1047 | { | |
1fc5d88e | 1048 | if (add_symbol_segment == this_segment |
c969da64 | 1049 | && !S_FORCE_RELOC (fixP->fx_addsy, 0) |
e7ff5c73 AM |
1050 | && !TC_FORCE_RELOCATION_LOCAL (fixP)) |
1051 | { | |
1052 | /* This fixup was made when the symbol's segment was | |
1053 | SEG_UNKNOWN, but it is now in the local segment. | |
1054 | So we know how to do the address without relocation. */ | |
1055 | add_number += S_GET_VALUE (fixP->fx_addsy); | |
1056 | fixP->fx_offset = add_number; | |
1057 | if (fixP->fx_pcrel) | |
1058 | add_number -= MD_PCREL_FROM_SECTION (fixP, this_segment); | |
1059 | fixP->fx_addsy = NULL; | |
1060 | fixP->fx_pcrel = 0; | |
1061 | } | |
1062 | else if (add_symbol_segment == absolute_section | |
c969da64 | 1063 | && !S_FORCE_RELOC (fixP->fx_addsy, 0) |
e7ff5c73 AM |
1064 | && !TC_FORCE_RELOCATION_ABS (fixP)) |
1065 | { | |
1066 | add_number += S_GET_VALUE (fixP->fx_addsy); | |
1067 | fixP->fx_offset = add_number; | |
1068 | fixP->fx_addsy = NULL; | |
1069 | } | |
1070 | else if (add_symbol_segment != undefined_section | |
1071 | && ! bfd_is_com_section (add_symbol_segment) | |
1072 | && MD_APPLY_SYM_VALUE (fixP)) | |
1073 | add_number += S_GET_VALUE (fixP->fx_addsy); | |
1074 | } | |
1075 | ||
1076 | if (fixP->fx_pcrel) | |
1077 | { | |
1078 | add_number -= MD_PCREL_FROM_SECTION (fixP, this_segment); | |
1079 | if (!fixP->fx_done && fixP->fx_addsy == NULL) | |
1080 | { | |
1081 | /* There was no symbol required by this relocation. | |
1082 | However, BFD doesn't really handle relocations | |
1083 | without symbols well. So fake up a local symbol in | |
1084 | the absolute section. */ | |
1085 | fixP->fx_addsy = abs_section_sym; | |
1086 | } | |
1087 | } | |
1088 | ||
1089 | if (!fixP->fx_done) | |
1090 | md_apply_fix (fixP, &add_number, this_segment); | |
1091 | ||
1092 | if (!fixP->fx_done) | |
1093 | { | |
e7ff5c73 AM |
1094 | if (fixP->fx_addsy == NULL) |
1095 | fixP->fx_addsy = abs_section_sym; | |
1096 | symbol_mark_used_in_reloc (fixP->fx_addsy); | |
1097 | if (fixP->fx_subsy != NULL) | |
1098 | symbol_mark_used_in_reloc (fixP->fx_subsy); | |
1099 | } | |
1100 | ||
5bc11336 | 1101 | if (!fixP->fx_no_overflow && fixP->fx_size != 0) |
e7ff5c73 AM |
1102 | { |
1103 | if (fixP->fx_size < sizeof (valueT)) | |
1104 | { | |
1105 | valueT mask; | |
1106 | ||
1107 | mask = 0; | |
1108 | mask--; /* Set all bits to one. */ | |
1109 | mask <<= fixP->fx_size * 8 - (fixP->fx_signed ? 1 : 0); | |
4504a634 JB |
1110 | if ((add_number & mask) != 0 |
1111 | && (fixP->fx_signed | |
1112 | ? (add_number & mask) != mask | |
1113 | : (-add_number & mask) != 0)) | |
e7ff5c73 AM |
1114 | { |
1115 | char buf[50], buf2[50]; | |
9a8041fd | 1116 | bfd_sprintf_vma (stdoutput, buf, fragP->fr_address + fixP->fx_where); |
e7ff5c73 | 1117 | if (add_number > 1000) |
9a8041fd | 1118 | bfd_sprintf_vma (stdoutput, buf2, add_number); |
e7ff5c73 AM |
1119 | else |
1120 | sprintf (buf2, "%ld", (long) add_number); | |
1121 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
992a06ee AM |
1122 | ngettext ("value of %s too large for field " |
1123 | "of %d byte at %s", | |
1124 | "value of %s too large for field " | |
1125 | "of %d bytes at %s", | |
1126 | fixP->fx_size), | |
e7ff5c73 AM |
1127 | buf2, fixP->fx_size, buf); |
1128 | } /* Generic error checking. */ | |
1129 | } | |
1130 | #ifdef WARN_SIGNED_OVERFLOW_WORD | |
1131 | /* Warn if a .word value is too large when treated as a signed | |
1132 | number. We already know it is not too negative. This is to | |
1133 | catch over-large switches generated by gcc on the 68k. */ | |
1134 | if (!flag_signed_overflow_ok | |
1135 | && fixP->fx_size == 2 | |
1136 | && add_number > 0x7fff) | |
1137 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
1138 | _("signed .word overflow; switch may be too large; %ld at 0x%lx"), | |
1139 | (long) add_number, | |
1140 | (long) (fragP->fr_address + fixP->fx_where)); | |
1141 | #endif | |
5bc11336 | 1142 | } |
e7ff5c73 AM |
1143 | |
1144 | #ifdef TC_VALIDATE_FIX | |
1145 | skip: ATTRIBUTE_UNUSED_LABEL | |
1146 | ; | |
1147 | #endif | |
1148 | #ifdef DEBUG5 | |
1149 | fprintf (stderr, "result:\n"); | |
1150 | print_fixup (fixP); | |
1151 | #endif | |
1152 | } /* For each fixS in this segment. */ | |
e7ff5c73 AM |
1153 | } |
1154 | ||
a161fe53 | 1155 | static void |
d7342424 KH |
1156 | fix_segment (bfd *abfd ATTRIBUTE_UNUSED, |
1157 | asection *sec, | |
e7ff5c73 | 1158 | void *xxx ATTRIBUTE_UNUSED) |
a161fe53 AM |
1159 | { |
1160 | segment_info_type *seginfo = seg_info (sec); | |
1161 | ||
1162 | fixup_segment (seginfo->fix_root, sec); | |
1163 | } | |
1164 | ||
e5435dec AM |
1165 | static void |
1166 | install_reloc (asection *sec, arelent *reloc, fragS *fragp, | |
3b4dbbbf | 1167 | const char *file, unsigned int line) |
e5435dec AM |
1168 | { |
1169 | char *err; | |
1170 | bfd_reloc_status_type s; | |
76d12939 AM |
1171 | asymbol *sym; |
1172 | ||
1173 | if (reloc->sym_ptr_ptr != NULL | |
1174 | && (sym = *reloc->sym_ptr_ptr) != NULL | |
1175 | && (sym->flags & BSF_KEEP) == 0 | |
1176 | && ((sym->flags & BSF_SECTION_SYM) == 0 | |
55f8b826 AM |
1177 | || (EMIT_SECTION_SYMBOLS |
1178 | && !bfd_is_abs_section (sym->section)))) | |
76d12939 | 1179 | as_bad_where (file, line, _("redefined symbol cannot be used on reloc")); |
e5435dec AM |
1180 | |
1181 | s = bfd_install_relocation (stdoutput, reloc, | |
1182 | fragp->fr_literal, fragp->fr_address, | |
1183 | sec, &err); | |
1184 | switch (s) | |
1185 | { | |
1186 | case bfd_reloc_ok: | |
1187 | break; | |
1188 | case bfd_reloc_overflow: | |
1189 | as_bad_where (file, line, _("relocation overflow")); | |
1190 | break; | |
1191 | case bfd_reloc_outofrange: | |
1192 | as_bad_where (file, line, _("relocation out of range")); | |
1193 | break; | |
1194 | default: | |
1195 | as_fatal (_("%s:%u: bad return from bfd_install_relocation: %x"), | |
1196 | file, line, s); | |
1197 | } | |
1198 | } | |
1199 | ||
7230378d AM |
1200 | static fragS * |
1201 | get_frag_for_reloc (fragS *last_frag, | |
1202 | const segment_info_type *seginfo, | |
1203 | const struct reloc_list *r) | |
1204 | { | |
1205 | fragS *f; | |
34bca508 | 1206 | |
7230378d AM |
1207 | for (f = last_frag; f != NULL; f = f->fr_next) |
1208 | if (f->fr_address <= r->u.b.r.address | |
1209 | && r->u.b.r.address < f->fr_address + f->fr_fix) | |
1210 | return f; | |
1211 | ||
1212 | for (f = seginfo->frchainP->frch_root; f != NULL; f = f->fr_next) | |
1213 | if (f->fr_address <= r->u.b.r.address | |
1214 | && r->u.b.r.address < f->fr_address + f->fr_fix) | |
1215 | return f; | |
1216 | ||
740bdc67 AM |
1217 | for (f = seginfo->frchainP->frch_root; f != NULL; f = f->fr_next) |
1218 | if (f->fr_address <= r->u.b.r.address | |
1219 | && r->u.b.r.address <= f->fr_address + f->fr_fix) | |
1220 | return f; | |
1221 | ||
7230378d AM |
1222 | as_bad_where (r->file, r->line, |
1223 | _("reloc not within (fixed part of) section")); | |
1224 | return NULL; | |
1225 | } | |
1226 | ||
252b5132 | 1227 | static void |
fd361982 AM |
1228 | write_relocs (bfd *abfd ATTRIBUTE_UNUSED, asection *sec, |
1229 | void *xxx ATTRIBUTE_UNUSED) | |
252b5132 RH |
1230 | { |
1231 | segment_info_type *seginfo = seg_info (sec); | |
252b5132 | 1232 | unsigned int n; |
05e9452c | 1233 | struct reloc_list *my_reloc_list, **rp, *r; |
252b5132 RH |
1234 | arelent **relocs; |
1235 | fixS *fixp; | |
7230378d | 1236 | fragS *last_frag; |
252b5132 RH |
1237 | |
1238 | /* If seginfo is NULL, we did not create this section; don't do | |
1239 | anything with it. */ | |
1240 | if (seginfo == NULL) | |
1241 | return; | |
1242 | ||
252b5132 RH |
1243 | n = 0; |
1244 | for (fixp = seginfo->fix_root; fixp; fixp = fixp->fx_next) | |
e5435dec AM |
1245 | if (!fixp->fx_done) |
1246 | n++; | |
1247 | ||
1248 | #ifdef RELOC_EXPANSION_POSSIBLE | |
1249 | n *= MAX_RELOC_EXPANSION; | |
1250 | #endif | |
252b5132 | 1251 | |
05e9452c AM |
1252 | /* Extract relocs for this section from reloc_list. */ |
1253 | rp = &reloc_list; | |
269b4ded | 1254 | |
05e9452c AM |
1255 | my_reloc_list = NULL; |
1256 | while ((r = *rp) != NULL) | |
1257 | { | |
1258 | if (r->u.b.sec == sec) | |
1259 | { | |
1260 | *rp = r->next; | |
1261 | r->next = my_reloc_list; | |
1262 | my_reloc_list = r; | |
1263 | n++; | |
1264 | } | |
1265 | else | |
1266 | rp = &r->next; | |
1267 | } | |
1268 | ||
add39d23 | 1269 | relocs = XCNEWVEC (arelent *, n); |
252b5132 | 1270 | |
7230378d AM |
1271 | n = 0; |
1272 | r = my_reloc_list; | |
1273 | last_frag = NULL; | |
252b5132 RH |
1274 | for (fixp = seginfo->fix_root; fixp != (fixS *) NULL; fixp = fixp->fx_next) |
1275 | { | |
d31f0f6d | 1276 | int fx_size, slack; |
871a6bd2 | 1277 | valueT loc; |
7230378d AM |
1278 | arelent **reloc; |
1279 | #ifndef RELOC_EXPANSION_POSSIBLE | |
1280 | arelent *rel; | |
1281 | ||
1282 | reloc = &rel; | |
1283 | #endif | |
252b5132 RH |
1284 | |
1285 | if (fixp->fx_done) | |
e5435dec | 1286 | continue; |
252b5132 | 1287 | |
d31f0f6d AM |
1288 | fx_size = fixp->fx_size; |
1289 | slack = TC_FX_SIZE_SLACK (fixp); | |
1290 | if (slack > 0) | |
1291 | fx_size = fx_size > slack ? fx_size - slack : 0; | |
1292 | loc = fixp->fx_where + fx_size; | |
e5435dec | 1293 | if (slack >= 0 && loc > fixp->fx_frag->fr_fix) |
d31f0f6d AM |
1294 | as_bad_where (fixp->fx_file, fixp->fx_line, |
1295 | _("internal error: fixup not contained within frag")); | |
252b5132 | 1296 | |
e5435dec | 1297 | #ifndef RELOC_EXPANSION_POSSIBLE |
7230378d | 1298 | *reloc = tc_gen_reloc (sec, fixp); |
e5435dec | 1299 | #else |
7230378d AM |
1300 | reloc = tc_gen_reloc (sec, fixp); |
1301 | #endif | |
252b5132 | 1302 | |
7230378d AM |
1303 | while (*reloc) |
1304 | { | |
1305 | while (r != NULL && r->u.b.r.address < (*reloc)->address) | |
1306 | { | |
1307 | fragS *f = get_frag_for_reloc (last_frag, seginfo, r); | |
1308 | if (f != NULL) | |
1309 | { | |
1310 | last_frag = f; | |
1311 | relocs[n++] = &r->u.b.r; | |
1312 | install_reloc (sec, &r->u.b.r, f, r->file, r->line); | |
1313 | } | |
1314 | r = r->next; | |
1315 | } | |
1316 | relocs[n++] = *reloc; | |
1317 | install_reloc (sec, *reloc, fixp->fx_frag, | |
1318 | fixp->fx_file, fixp->fx_line); | |
1319 | #ifndef RELOC_EXPANSION_POSSIBLE | |
1320 | break; | |
1321 | #else | |
1322 | reloc++; | |
e5435dec | 1323 | #endif |
7230378d AM |
1324 | } |
1325 | } | |
d31f0f6d | 1326 | |
7230378d AM |
1327 | while (r != NULL) |
1328 | { | |
1329 | fragS *f = get_frag_for_reloc (last_frag, seginfo, r); | |
1330 | if (f != NULL) | |
1331 | { | |
1332 | last_frag = f; | |
1333 | relocs[n++] = &r->u.b.r; | |
1334 | install_reloc (sec, &r->u.b.r, f, r->file, r->line); | |
1335 | } | |
1336 | r = r->next; | |
252b5132 | 1337 | } |
252b5132 RH |
1338 | |
1339 | #ifdef DEBUG4 | |
1340 | { | |
1596988d | 1341 | unsigned int k, j, nsyms; |
252b5132 RH |
1342 | asymbol **sympp; |
1343 | sympp = bfd_get_outsymbols (stdoutput); | |
1344 | nsyms = bfd_get_symcount (stdoutput); | |
1596988d TG |
1345 | for (k = 0; k < n; k++) |
1346 | if (((*relocs[k]->sym_ptr_ptr)->flags & BSF_SECTION_SYM) == 0) | |
252b5132 RH |
1347 | { |
1348 | for (j = 0; j < nsyms; j++) | |
1596988d | 1349 | if (sympp[j] == *relocs[k]->sym_ptr_ptr) |
252b5132 RH |
1350 | break; |
1351 | if (j == nsyms) | |
1352 | abort (); | |
1353 | } | |
1354 | } | |
1355 | #endif | |
1356 | ||
1357 | if (n) | |
e5435dec | 1358 | { |
fd361982 | 1359 | flagword flags = bfd_section_flags (sec); |
e5435dec | 1360 | flags |= SEC_RELOC; |
fd361982 | 1361 | bfd_set_section_flags (sec, flags); |
e5435dec AM |
1362 | bfd_set_reloc (stdoutput, sec, relocs, n); |
1363 | } | |
252b5132 | 1364 | |
945a1a6b ILT |
1365 | #ifdef SET_SECTION_RELOCS |
1366 | SET_SECTION_RELOCS (sec, relocs, n); | |
1367 | #endif | |
1368 | ||
252b5132 RH |
1369 | #ifdef DEBUG3 |
1370 | { | |
1596988d TG |
1371 | unsigned int k; |
1372 | ||
252b5132 | 1373 | fprintf (stderr, "relocs for sec %s\n", sec->name); |
1596988d | 1374 | for (k = 0; k < n; k++) |
252b5132 | 1375 | { |
1596988d TG |
1376 | arelent *rel = relocs[k]; |
1377 | asymbol *s = *rel->sym_ptr_ptr; | |
988392e2 | 1378 | fprintf (stderr, " reloc %2d @%p off %4lx : sym %-10s addend %lx\n", |
1596988d TG |
1379 | k, rel, (unsigned long)rel->address, s->name, |
1380 | (unsigned long)rel->addend); | |
252b5132 RH |
1381 | } |
1382 | } | |
1383 | #endif | |
1384 | } | |
1385 | ||
0acf065b CC |
1386 | static int |
1387 | compress_frag (struct z_stream_s *strm, const char *contents, int in_size, | |
1388 | fragS **last_newf, struct obstack *ob) | |
1389 | { | |
1390 | int out_size; | |
1391 | int total_out_size = 0; | |
1392 | fragS *f = *last_newf; | |
1393 | char *next_out; | |
1394 | int avail_out; | |
1395 | ||
1396 | /* Call the compression routine repeatedly until it has finished | |
1397 | processing the frag. */ | |
1398 | while (in_size > 0) | |
1399 | { | |
1400 | /* Reserve all the space available in the current chunk. | |
1401 | If none is available, start a new frag. */ | |
1402 | avail_out = obstack_room (ob); | |
1403 | if (avail_out <= 0) | |
1404 | { | |
1405 | obstack_finish (ob); | |
1406 | f = frag_alloc (ob); | |
1407 | f->fr_type = rs_fill; | |
1408 | (*last_newf)->fr_next = f; | |
1409 | *last_newf = f; | |
1410 | avail_out = obstack_room (ob); | |
1411 | } | |
1412 | if (avail_out <= 0) | |
1413 | as_fatal (_("can't extend frag")); | |
1414 | next_out = obstack_next_free (ob); | |
1415 | obstack_blank_fast (ob, avail_out); | |
1416 | out_size = compress_data (strm, &contents, &in_size, | |
1417 | &next_out, &avail_out); | |
1418 | if (out_size < 0) | |
1419 | return -1; | |
1420 | ||
1421 | f->fr_fix += out_size; | |
1422 | total_out_size += out_size; | |
1423 | ||
1424 | /* Return unused space. */ | |
1425 | if (avail_out > 0) | |
1426 | obstack_blank_fast (ob, -avail_out); | |
1427 | } | |
1428 | ||
1429 | return total_out_size; | |
1430 | } | |
1431 | ||
1432 | static void | |
1433 | compress_debug (bfd *abfd, asection *sec, void *xxx ATTRIBUTE_UNUSED) | |
1434 | { | |
1435 | segment_info_type *seginfo = seg_info (sec); | |
1436 | fragS *f; | |
1437 | fragS *first_newf; | |
1438 | fragS *last_newf; | |
1439 | struct obstack *ob = &seginfo->frchainP->frch_obstack; | |
1440 | bfd_size_type uncompressed_size = (bfd_size_type) sec->size; | |
1441 | bfd_size_type compressed_size; | |
1442 | const char *section_name; | |
1443 | char *compressed_name; | |
1444 | char *header; | |
1445 | struct z_stream_s *strm; | |
1446 | int x; | |
fd361982 | 1447 | flagword flags = bfd_section_flags (sec); |
151411f8 | 1448 | unsigned int header_size, compression_header_size; |
0acf065b CC |
1449 | |
1450 | if (seginfo == NULL | |
6ac88ef3 | 1451 | || sec->size < 32 |
4a114e3e | 1452 | || (flags & (SEC_ALLOC | SEC_HAS_CONTENTS)) == SEC_ALLOC) |
0acf065b CC |
1453 | return; |
1454 | ||
fd361982 | 1455 | section_name = bfd_section_name (sec); |
d34049e8 | 1456 | if (!startswith (section_name, ".debug_")) |
0acf065b CC |
1457 | return; |
1458 | ||
1459 | strm = compress_init (); | |
1460 | if (strm == NULL) | |
1461 | return; | |
1462 | ||
151411f8 | 1463 | if (flag_compress_debug == COMPRESS_DEBUG_GABI_ZLIB) |
dab394de | 1464 | { |
dab394de L |
1465 | compression_header_size |
1466 | = bfd_get_compression_header_size (stdoutput, NULL); | |
1467 | header_size = compression_header_size; | |
1468 | } | |
151411f8 | 1469 | else |
dab394de | 1470 | { |
dab394de L |
1471 | compression_header_size = 0; |
1472 | header_size = 12; | |
1473 | } | |
151411f8 | 1474 | |
dab394de | 1475 | /* Create a new frag to contain the compression header. */ |
0acf065b | 1476 | first_newf = frag_alloc (ob); |
151411f8 | 1477 | if (obstack_room (ob) < header_size) |
0acf065b | 1478 | first_newf = frag_alloc (ob); |
151411f8 | 1479 | if (obstack_room (ob) < header_size) |
992a06ee AM |
1480 | as_fatal (ngettext ("can't extend frag %lu char", |
1481 | "can't extend frag %lu chars", | |
1482 | (unsigned long) header_size), | |
1483 | (unsigned long) header_size); | |
0acf065b | 1484 | last_newf = first_newf; |
151411f8 | 1485 | obstack_blank_fast (ob, header_size); |
0acf065b | 1486 | last_newf->fr_type = rs_fill; |
151411f8 | 1487 | last_newf->fr_fix = header_size; |
0acf065b | 1488 | header = last_newf->fr_literal; |
151411f8 | 1489 | compressed_size = header_size; |
0acf065b CC |
1490 | |
1491 | /* Stream the frags through the compression engine, adding new frags | |
2b0f3761 | 1492 | as necessary to accommodate the compressed output. */ |
0acf065b CC |
1493 | for (f = seginfo->frchainP->frch_root; |
1494 | f; | |
1495 | f = f->fr_next) | |
1496 | { | |
1497 | offsetT fill_size; | |
1498 | char *fill_literal; | |
1499 | offsetT count; | |
1500 | int out_size; | |
1501 | ||
1502 | gas_assert (f->fr_type == rs_fill); | |
1503 | if (f->fr_fix) | |
1504 | { | |
1505 | out_size = compress_frag (strm, f->fr_literal, f->fr_fix, | |
1506 | &last_newf, ob); | |
1507 | if (out_size < 0) | |
1508 | return; | |
1509 | compressed_size += out_size; | |
1510 | } | |
1511 | fill_literal = f->fr_literal + f->fr_fix; | |
1512 | fill_size = f->fr_var; | |
1513 | count = f->fr_offset; | |
1514 | gas_assert (count >= 0); | |
1515 | if (fill_size && count) | |
1516 | { | |
1517 | while (count--) | |
1518 | { | |
1519 | out_size = compress_frag (strm, fill_literal, (int) fill_size, | |
1520 | &last_newf, ob); | |
1521 | if (out_size < 0) | |
1522 | return; | |
1523 | compressed_size += out_size; | |
1524 | } | |
1525 | } | |
1526 | } | |
1527 | ||
1528 | /* Flush the compression state. */ | |
1529 | for (;;) | |
1530 | { | |
1531 | int avail_out; | |
1532 | char *next_out; | |
1533 | int out_size; | |
1534 | ||
1535 | /* Reserve all the space available in the current chunk. | |
1536 | If none is available, start a new frag. */ | |
1537 | avail_out = obstack_room (ob); | |
1538 | if (avail_out <= 0) | |
1539 | { | |
1540 | fragS *newf; | |
1541 | ||
1542 | obstack_finish (ob); | |
1543 | newf = frag_alloc (ob); | |
1544 | newf->fr_type = rs_fill; | |
1545 | last_newf->fr_next = newf; | |
1546 | last_newf = newf; | |
1547 | avail_out = obstack_room (ob); | |
1548 | } | |
1549 | if (avail_out <= 0) | |
1550 | as_fatal (_("can't extend frag")); | |
1551 | next_out = obstack_next_free (ob); | |
1552 | obstack_blank_fast (ob, avail_out); | |
1553 | x = compress_finish (strm, &next_out, &avail_out, &out_size); | |
1554 | if (x < 0) | |
1555 | return; | |
1556 | ||
1557 | last_newf->fr_fix += out_size; | |
1558 | compressed_size += out_size; | |
1559 | ||
1560 | /* Return unused space. */ | |
1561 | if (avail_out > 0) | |
1562 | obstack_blank_fast (ob, -avail_out); | |
1563 | ||
1564 | if (x == 0) | |
1565 | break; | |
1566 | } | |
1567 | ||
b422eb49 L |
1568 | /* PR binutils/18087: If compression didn't make the section smaller, |
1569 | just keep it uncompressed. */ | |
317974f6 | 1570 | if (compressed_size >= uncompressed_size) |
273a4985 | 1571 | return; |
d94077e2 | 1572 | |
0acf065b CC |
1573 | /* Replace the uncompressed frag list with the compressed frag list. */ |
1574 | seginfo->frchainP->frch_root = first_newf; | |
1575 | seginfo->frchainP->frch_last = last_newf; | |
1576 | ||
1577 | /* Update the section size and its name. */ | |
151411f8 | 1578 | bfd_update_compression_header (abfd, (bfd_byte *) header, sec); |
fd361982 | 1579 | x = bfd_set_section_size (sec, compressed_size); |
0acf065b | 1580 | gas_assert (x); |
151411f8 L |
1581 | if (!compression_header_size) |
1582 | { | |
29a2809e | 1583 | compressed_name = concat (".z", section_name + 1, (char *) NULL); |
fd361982 | 1584 | bfd_rename_section (sec, compressed_name); |
151411f8 | 1585 | } |
0acf065b CC |
1586 | } |
1587 | ||
62a02d25 L |
1588 | #ifndef md_generate_nops |
1589 | /* Genenerate COUNT bytes of no-op instructions to WHERE. A target | |
1590 | backend must override this with proper no-op instructions. */ | |
1591 | ||
1592 | static void | |
1593 | md_generate_nops (fragS *f ATTRIBUTE_UNUSED, | |
1594 | char *where ATTRIBUTE_UNUSED, | |
1595 | offsetT count ATTRIBUTE_UNUSED, | |
1596 | int control ATTRIBUTE_UNUSED) | |
1597 | { | |
8f065d3b | 1598 | as_bad (_("unimplemented .nops directive")); |
62a02d25 L |
1599 | } |
1600 | #endif | |
1601 | ||
252b5132 | 1602 | static void |
d7342424 KH |
1603 | write_contents (bfd *abfd ATTRIBUTE_UNUSED, |
1604 | asection *sec, | |
e7ff5c73 | 1605 | void *xxx ATTRIBUTE_UNUSED) |
252b5132 RH |
1606 | { |
1607 | segment_info_type *seginfo = seg_info (sec); | |
685736be | 1608 | addressT offset = 0; |
252b5132 RH |
1609 | fragS *f; |
1610 | ||
1611 | /* Write out the frags. */ | |
1612 | if (seginfo == NULL | |
fd361982 | 1613 | || !(bfd_section_flags (sec) & SEC_HAS_CONTENTS)) |
252b5132 RH |
1614 | return; |
1615 | ||
1616 | for (f = seginfo->frchainP->frch_root; | |
1617 | f; | |
1618 | f = f->fr_next) | |
1619 | { | |
1620 | int x; | |
685736be | 1621 | addressT fill_size; |
252b5132 | 1622 | char *fill_literal; |
685736be | 1623 | offsetT count; |
252b5132 | 1624 | |
62a02d25 | 1625 | gas_assert (f->fr_type == rs_fill || f->fr_type == rs_fill_nop); |
252b5132 RH |
1626 | if (f->fr_fix) |
1627 | { | |
1628 | x = bfd_set_section_contents (stdoutput, sec, | |
1629 | f->fr_literal, (file_ptr) offset, | |
1630 | (bfd_size_type) f->fr_fix); | |
b34976b6 | 1631 | if (!x) |
992a06ee AM |
1632 | as_fatal (ngettext ("can't write %ld byte " |
1633 | "to section %s of %s: '%s'", | |
1634 | "can't write %ld bytes " | |
1635 | "to section %s of %s: '%s'", | |
1636 | (long) f->fr_fix), | |
1637 | (long) f->fr_fix, | |
69f57659 | 1638 | bfd_section_name (sec), bfd_get_filename (stdoutput), |
885afe7b | 1639 | bfd_errmsg (bfd_get_error ())); |
252b5132 RH |
1640 | offset += f->fr_fix; |
1641 | } | |
62a02d25 | 1642 | |
252b5132 RH |
1643 | fill_size = f->fr_var; |
1644 | count = f->fr_offset; | |
62a02d25 L |
1645 | fill_literal = f->fr_literal + f->fr_fix; |
1646 | ||
1647 | if (f->fr_type == rs_fill_nop) | |
1648 | { | |
1649 | gas_assert (count >= 0 && fill_size == 1); | |
1650 | if (count > 0) | |
1651 | { | |
1652 | char *buf = xmalloc (count); | |
1653 | md_generate_nops (f, buf, count, *fill_literal); | |
1654 | x = bfd_set_section_contents | |
1655 | (stdoutput, sec, buf, (file_ptr) offset, | |
1656 | (bfd_size_type) count); | |
1657 | if (!x) | |
1658 | as_fatal (ngettext ("can't fill %ld byte " | |
1659 | "in section %s of %s: '%s'", | |
1660 | "can't fill %ld bytes " | |
1661 | "in section %s of %s: '%s'", | |
69f57659 AM |
1662 | (long) count), |
1663 | (long) count, | |
1664 | bfd_section_name (sec), | |
1665 | bfd_get_filename (stdoutput), | |
1666 | bfd_errmsg (bfd_get_error ())); | |
62a02d25 L |
1667 | offset += count; |
1668 | free (buf); | |
1669 | } | |
1670 | continue; | |
1671 | } | |
1672 | ||
9c2799c2 | 1673 | gas_assert (count >= 0); |
252b5132 RH |
1674 | if (fill_size && count) |
1675 | { | |
1676 | char buf[256]; | |
efaf0ba4 | 1677 | if (fill_size > sizeof (buf)) |
252b5132 | 1678 | { |
efaf0ba4 | 1679 | /* Do it the old way. Can this ever happen? */ |
252b5132 RH |
1680 | while (count--) |
1681 | { | |
1682 | x = bfd_set_section_contents (stdoutput, sec, | |
1683 | fill_literal, | |
1684 | (file_ptr) offset, | |
1685 | (bfd_size_type) fill_size); | |
b34976b6 | 1686 | if (!x) |
992a06ee AM |
1687 | as_fatal (ngettext ("can't fill %ld byte " |
1688 | "in section %s of %s: '%s'", | |
1689 | "can't fill %ld bytes " | |
1690 | "in section %s of %s: '%s'", | |
1691 | (long) fill_size), | |
1692 | (long) fill_size, | |
69f57659 AM |
1693 | bfd_section_name (sec), |
1694 | bfd_get_filename (stdoutput), | |
885afe7b | 1695 | bfd_errmsg (bfd_get_error ())); |
252b5132 RH |
1696 | offset += fill_size; |
1697 | } | |
1698 | } | |
1699 | else | |
1700 | { | |
1701 | /* Build a buffer full of fill objects and output it as | |
1702 | often as necessary. This saves on the overhead of | |
1703 | potentially lots of bfd_set_section_contents calls. */ | |
1704 | int n_per_buf, i; | |
1705 | if (fill_size == 1) | |
1706 | { | |
1707 | n_per_buf = sizeof (buf); | |
1708 | memset (buf, *fill_literal, n_per_buf); | |
1709 | } | |
1710 | else | |
1711 | { | |
1712 | char *bufp; | |
efaf0ba4 | 1713 | n_per_buf = sizeof (buf) / fill_size; |
252b5132 | 1714 | for (i = n_per_buf, bufp = buf; i; i--, bufp += fill_size) |
efaf0ba4 | 1715 | memcpy (bufp, fill_literal, fill_size); |
252b5132 RH |
1716 | } |
1717 | for (; count > 0; count -= n_per_buf) | |
1718 | { | |
1719 | n_per_buf = n_per_buf > count ? count : n_per_buf; | |
efaf0ba4 NC |
1720 | x = bfd_set_section_contents |
1721 | (stdoutput, sec, buf, (file_ptr) offset, | |
1722 | (bfd_size_type) n_per_buf * fill_size); | |
b34976b6 | 1723 | if (!x) |
992a06ee AM |
1724 | as_fatal (ngettext ("can't fill %ld byte " |
1725 | "in section %s of %s: '%s'", | |
1726 | "can't fill %ld bytes " | |
1727 | "in section %s of %s: '%s'", | |
1728 | (long) (n_per_buf * fill_size)), | |
1729 | (long) (n_per_buf * fill_size), | |
69f57659 AM |
1730 | bfd_section_name (sec), |
1731 | bfd_get_filename (stdoutput), | |
a22429b9 | 1732 | bfd_errmsg (bfd_get_error ())); |
252b5132 RH |
1733 | offset += n_per_buf * fill_size; |
1734 | } | |
1735 | } | |
1736 | } | |
1737 | } | |
1738 | } | |
252b5132 | 1739 | |
252b5132 | 1740 | static void |
d7342424 | 1741 | merge_data_into_text (void) |
252b5132 | 1742 | { |
252b5132 RH |
1743 | seg_info (text_section)->frchainP->frch_last->fr_next = |
1744 | seg_info (data_section)->frchainP->frch_root; | |
1745 | seg_info (text_section)->frchainP->frch_last = | |
1746 | seg_info (data_section)->frchainP->frch_last; | |
1747 | seg_info (data_section)->frchainP = 0; | |
252b5132 | 1748 | } |
252b5132 | 1749 | |
252b5132 | 1750 | static void |
d7342424 | 1751 | set_symtab (void) |
252b5132 RH |
1752 | { |
1753 | int nsyms; | |
1754 | asymbol **asympp; | |
1755 | symbolS *symp; | |
5b7c81bd | 1756 | bool result; |
252b5132 RH |
1757 | |
1758 | /* Count symbols. We can't rely on a count made by the loop in | |
1759 | write_object_file, because *_frob_file may add a new symbol or | |
d1bcae83 | 1760 | two. Generate unused section symbols only if needed. */ |
252b5132 RH |
1761 | nsyms = 0; |
1762 | for (symp = symbol_rootP; symp; symp = symbol_next (symp)) | |
d1bcae83 L |
1763 | if (bfd_keep_unused_section_symbols (stdoutput) |
1764 | || !symbol_section_p (symp) | |
1765 | || symbol_used_in_reloc_p (symp)) | |
1766 | nsyms++; | |
252b5132 RH |
1767 | |
1768 | if (nsyms) | |
1769 | { | |
1770 | int i; | |
0e1a166b | 1771 | bfd_size_type amt = (bfd_size_type) nsyms * sizeof (asymbol *); |
252b5132 | 1772 | |
1e9cc1c2 | 1773 | asympp = (asymbol **) bfd_alloc (stdoutput, amt); |
252b5132 | 1774 | symp = symbol_rootP; |
d1bcae83 L |
1775 | for (i = 0; i < nsyms; symp = symbol_next (symp)) |
1776 | if (bfd_keep_unused_section_symbols (stdoutput) | |
1777 | || !symbol_section_p (symp) | |
1778 | || symbol_used_in_reloc_p (symp)) | |
1779 | { | |
1780 | asympp[i] = symbol_get_bfdsym (symp); | |
1781 | if (asympp[i]->flags != BSF_SECTION_SYM | |
1782 | || !(bfd_is_const_section (asympp[i]->section) | |
1783 | && asympp[i]->section->symbol == asympp[i])) | |
1784 | asympp[i]->flags |= BSF_KEEP; | |
1785 | symbol_mark_written (symp); | |
1786 | /* Include this section symbol in the symbol table. */ | |
1787 | if (symbol_section_p (symp)) | |
1788 | asympp[i]->flags |= BSF_SECTION_SYM_USED; | |
1789 | i++; | |
1790 | } | |
252b5132 RH |
1791 | } |
1792 | else | |
1793 | asympp = 0; | |
1794 | result = bfd_set_symtab (stdoutput, asympp, nsyms); | |
9c2799c2 | 1795 | gas_assert (result); |
252b5132 RH |
1796 | symbol_table_frozen = 1; |
1797 | } | |
252b5132 RH |
1798 | |
1799 | /* Finish the subsegments. After every sub-segment, we fake an | |
2edb36e7 | 1800 | ".align ...". This conforms to BSD4.2 brain-damage. We then fake |
252b5132 RH |
1801 | ".fill 0" because that is the kind of frag that requires least |
1802 | thought. ".align" frags like to have a following frag since that | |
1803 | makes calculating their intended length trivial. */ | |
1804 | ||
1805 | #ifndef SUB_SEGMENT_ALIGN | |
18e1d487 | 1806 | #ifdef HANDLE_ALIGN |
436d9e46 | 1807 | /* The last subsegment gets an alignment corresponding to the alignment |
18e1d487 AM |
1808 | of the section. This allows proper nop-filling at the end of |
1809 | code-bearing sections. */ | |
1810 | #define SUB_SEGMENT_ALIGN(SEG, FRCHAIN) \ | |
9028d943 | 1811 | (!(FRCHAIN)->frch_next && subseg_text_p (SEG) \ |
2edb36e7 | 1812 | && !do_not_pad_sections_to_alignment \ |
9028d943 AM |
1813 | ? get_recorded_alignment (SEG) \ |
1814 | : 0) | |
18e1d487 | 1815 | #else |
18e1d487 | 1816 | #define SUB_SEGMENT_ALIGN(SEG, FRCHAIN) 0 |
252b5132 RH |
1817 | #endif |
1818 | #endif | |
1819 | ||
85024cd8 | 1820 | static void |
d98b0e2b | 1821 | subsegs_finish_section (asection *s) |
252b5132 RH |
1822 | { |
1823 | struct frchain *frchainP; | |
d98b0e2b TG |
1824 | segment_info_type *seginfo = seg_info (s); |
1825 | if (!seginfo) | |
1826 | return; | |
252b5132 | 1827 | |
d98b0e2b TG |
1828 | for (frchainP = seginfo->frchainP; |
1829 | frchainP != NULL; | |
1830 | frchainP = frchainP->frch_next) | |
252b5132 | 1831 | { |
93a24ba7 | 1832 | int alignment; |
0a9ef439 | 1833 | |
d98b0e2b | 1834 | subseg_set (s, frchainP->frch_subseg); |
381a1ab3 | 1835 | |
d98b0e2b TG |
1836 | /* This now gets called even if we had errors. In that case, |
1837 | any alignment is meaningless, and, moreover, will look weird | |
1838 | if we are generating a listing. */ | |
93a24ba7 MR |
1839 | if (had_errors ()) |
1840 | do_not_pad_sections_to_alignment = 1; | |
c9049d30 | 1841 | |
93a24ba7 | 1842 | alignment = SUB_SEGMENT_ALIGN (now_seg, frchainP); |
fd361982 | 1843 | if ((bfd_section_flags (now_seg) & SEC_MERGE) |
93a24ba7 MR |
1844 | && now_seg->entsize) |
1845 | { | |
1846 | unsigned int entsize = now_seg->entsize; | |
1847 | int entalign = 0; | |
d98b0e2b | 1848 | |
93a24ba7 MR |
1849 | while ((entsize & 1) == 0) |
1850 | { | |
1851 | ++entalign; | |
1852 | entsize >>= 1; | |
381a1ab3 | 1853 | } |
93a24ba7 MR |
1854 | |
1855 | if (entalign > alignment) | |
1856 | alignment = entalign; | |
d98b0e2b | 1857 | } |
0a9ef439 | 1858 | |
d98b0e2b TG |
1859 | if (subseg_text_p (now_seg)) |
1860 | frag_align_code (alignment, 0); | |
1861 | else | |
1862 | frag_align (alignment, 0, 0); | |
252b5132 | 1863 | |
d98b0e2b TG |
1864 | /* frag_align will have left a new frag. |
1865 | Use this last frag for an empty ".fill". | |
252b5132 | 1866 | |
d98b0e2b TG |
1867 | For this segment ... |
1868 | Create a last frag. Do not leave a "being filled in frag". */ | |
1869 | frag_wane (frag_now); | |
1870 | frag_now->fr_fix = 0; | |
1871 | know (frag_now->fr_next == NULL); | |
252b5132 RH |
1872 | } |
1873 | } | |
1874 | ||
d98b0e2b TG |
1875 | static void |
1876 | subsegs_finish (void) | |
1877 | { | |
1878 | asection *s; | |
1879 | ||
1880 | for (s = stdoutput->sections; s; s = s->next) | |
1881 | subsegs_finish_section (s); | |
1882 | } | |
1883 | ||
1884 | #ifdef OBJ_ELF | |
1885 | static void | |
1886 | create_obj_attrs_section (void) | |
1887 | { | |
1888 | segT s; | |
1889 | char *p; | |
1890 | offsetT size; | |
1891 | const char *name; | |
1892 | ||
1893 | size = bfd_elf_obj_attr_size (stdoutput); | |
0df8ad28 NC |
1894 | if (size == 0) |
1895 | return; | |
1896 | ||
1897 | name = get_elf_backend_data (stdoutput)->obj_attrs_section; | |
1898 | if (!name) | |
1899 | name = ".gnu.attributes"; | |
1900 | s = subseg_new (name, 0); | |
1901 | elf_section_type (s) | |
1902 | = get_elf_backend_data (stdoutput)->obj_attrs_section_type; | |
fd361982 | 1903 | bfd_set_section_flags (s, SEC_READONLY | SEC_DATA); |
0df8ad28 NC |
1904 | frag_now_fix (); |
1905 | p = frag_more (size); | |
1906 | bfd_elf_set_obj_attr_contents (stdoutput, (bfd_byte *)p, size); | |
1907 | ||
1908 | subsegs_finish_section (s); | |
1909 | relax_segment (seg_info (s)->frchainP->frch_root, s, 0); | |
1910 | size_seg (stdoutput, s, NULL); | |
1911 | } | |
1912 | ||
0df8ad28 NC |
1913 | /* Create a relocation against an entry in a GNU Build attribute section. */ |
1914 | ||
1915 | static void | |
1916 | create_note_reloc (segT sec, | |
1917 | symbolS * sym, | |
269b4ded NC |
1918 | bfd_size_type note_offset, |
1919 | bfd_size_type desc2_offset, | |
56c1b507 | 1920 | offsetT desc2_size, |
0df8ad28 NC |
1921 | int reloc_type, |
1922 | bfd_vma addend, | |
1923 | char * note) | |
1924 | { | |
1925 | struct reloc_list * reloc; | |
1926 | ||
1927 | reloc = XNEW (struct reloc_list); | |
1928 | ||
1929 | /* We create a .b type reloc as resolve_reloc_expr_symbols() has already been called. */ | |
269b4ded NC |
1930 | reloc->u.b.sec = sec; |
1931 | reloc->u.b.s = symbol_get_bfdsym (sym); | |
0df8ad28 | 1932 | reloc->u.b.r.sym_ptr_ptr = & reloc->u.b.s; |
269b4ded | 1933 | reloc->u.b.r.address = note_offset + desc2_offset; |
0df8ad28 NC |
1934 | reloc->u.b.r.addend = addend; |
1935 | reloc->u.b.r.howto = bfd_reloc_type_lookup (stdoutput, reloc_type); | |
1936 | ||
1937 | if (reloc->u.b.r.howto == NULL) | |
d98b0e2b | 1938 | { |
0df8ad28 NC |
1939 | as_bad (_("unable to create reloc for build note")); |
1940 | return; | |
1941 | } | |
1942 | ||
1943 | reloc->file = N_("<gnu build note>"); | |
1944 | reloc->line = 0; | |
1945 | ||
1946 | reloc->next = reloc_list; | |
1947 | reloc_list = reloc; | |
1948 | ||
1949 | /* For REL relocs, store the addend in the section. */ | |
1950 | if (! sec->use_rela_p | |
1951 | /* The SH target is a special case that uses RELA relocs | |
1952 | but still stores the addend in the word being relocated. */ | |
1953 | || strstr (bfd_get_target (stdoutput), "-sh") != NULL) | |
1954 | { | |
56c1b507 NC |
1955 | offsetT i; |
1956 | ||
1957 | /* Zero out the addend, since it is now stored in the note. */ | |
1958 | reloc->u.b.r.addend = 0; | |
1959 | ||
0df8ad28 NC |
1960 | if (target_big_endian) |
1961 | { | |
56c1b507 NC |
1962 | for (i = desc2_size; addend != 0 && i > 0; addend >>= 8, i--) |
1963 | note[desc2_offset + i - 1] = (addend & 0xff); | |
0df8ad28 NC |
1964 | } |
1965 | else | |
56c1b507 NC |
1966 | { |
1967 | for (i = 0; addend != 0 && i < desc2_size; addend >>= 8, i++) | |
1968 | note[desc2_offset + i] = (addend & 0xff); | |
1969 | } | |
d98b0e2b TG |
1970 | } |
1971 | } | |
0df8ad28 NC |
1972 | |
1973 | static void | |
1974 | maybe_generate_build_notes (void) | |
1975 | { | |
1976 | segT sec; | |
1977 | char * note; | |
1978 | offsetT note_size; | |
864bb26c | 1979 | offsetT total_size; |
0df8ad28 NC |
1980 | offsetT desc_size; |
1981 | offsetT desc2_offset; | |
1982 | int desc_reloc; | |
1983 | symbolS * sym; | |
8d1015a8 | 1984 | asymbol * bsym; |
0df8ad28 NC |
1985 | |
1986 | if (! flag_generate_build_notes | |
1987 | || bfd_get_section_by_name (stdoutput, | |
1988 | GNU_BUILD_ATTRS_SECTION_NAME) != NULL) | |
1989 | return; | |
1990 | ||
1991 | /* Create a GNU Build Attribute section. */ | |
5b7c81bd | 1992 | sec = subseg_new (GNU_BUILD_ATTRS_SECTION_NAME, false); |
0df8ad28 | 1993 | elf_section_type (sec) = SHT_NOTE; |
61826503 CE |
1994 | bfd_set_section_flags (sec, (SEC_READONLY | SEC_HAS_CONTENTS | SEC_DATA |
1995 | | SEC_OCTETS)); | |
fd361982 | 1996 | bfd_set_section_alignment (sec, 2); |
0df8ad28 | 1997 | |
864bb26c NC |
1998 | /* Work out the size of the notes that we will create, |
1999 | and the relocation we should use. */ | |
0df8ad28 NC |
2000 | if (bfd_arch_bits_per_address (stdoutput) <= 32) |
2001 | { | |
2002 | note_size = 28; | |
2003 | desc_size = 8; /* Two 4-byte offsets. */ | |
2004 | desc2_offset = 24; | |
2005 | ||
2006 | /* FIXME: The BFD backend for the CRX target does not support the | |
2007 | BFD_RELOC_32, even though it really should. Likewise for the | |
2008 | CR16 target. So we have special case code here... */ | |
2009 | if (strstr (bfd_get_target (stdoutput), "-crx") != NULL) | |
2010 | desc_reloc = BFD_RELOC_CRX_NUM32; | |
2011 | else if (strstr (bfd_get_target (stdoutput), "-cr16") != NULL) | |
2012 | desc_reloc = BFD_RELOC_CR16_NUM32; | |
2013 | else | |
2014 | desc_reloc = BFD_RELOC_32; | |
2015 | } | |
2016 | else | |
2017 | { | |
2018 | note_size = 36; | |
2019 | desc_size = 16; /* Two 8-byte offsets. */ | |
2020 | desc2_offset = 28; | |
2021 | /* FIXME: The BFD backend for the IA64 target does not support the | |
2022 | BFD_RELOC_64, even though it really should. The HPPA backend | |
2023 | has a similar issue, although it does not support BFD_RELOCs at | |
2024 | all! So we have special case code to handle these targets. */ | |
2025 | if (strstr (bfd_get_target (stdoutput), "-ia64") != NULL) | |
2026 | desc_reloc = target_big_endian ? BFD_RELOC_IA64_DIR32MSB : BFD_RELOC_IA64_DIR32LSB; | |
2027 | else if (strstr (bfd_get_target (stdoutput), "-hppa") != NULL) | |
2028 | desc_reloc = 80; /* R_PARISC_DIR64. */ | |
2029 | else | |
2030 | desc_reloc = BFD_RELOC_64; | |
2031 | } | |
2032 | ||
864bb26c NC |
2033 | /* We have to create a note for *each* code section. |
2034 | Linker garbage collection might discard some. */ | |
2035 | total_size = 0; | |
2036 | note = NULL; | |
0df8ad28 | 2037 | |
8d1015a8 AM |
2038 | for (sym = symbol_rootP; sym != NULL; sym = symbol_next (sym)) |
2039 | if ((bsym = symbol_get_bfdsym (sym)) != NULL | |
2040 | && bsym->flags & BSF_SECTION_SYM | |
2041 | && bsym->section != NULL | |
2e48456f | 2042 | /* Skip linkonce sections - we cannot use these section symbols as they may disappear. */ |
8d1015a8 | 2043 | && (bsym->section->flags & (SEC_CODE | SEC_LINK_ONCE)) == SEC_CODE |
864bb26c | 2044 | /* Not all linkonce sections are flagged... */ |
d34049e8 | 2045 | && !startswith (S_GET_NAME (sym), ".gnu.linkonce")) |
0df8ad28 | 2046 | { |
864bb26c NC |
2047 | /* Create a version note. */ |
2048 | frag_now_fix (); | |
2049 | note = frag_more (note_size); | |
2050 | memset (note, 0, note_size); | |
0df8ad28 | 2051 | |
864bb26c | 2052 | if (target_big_endian) |
0df8ad28 | 2053 | { |
864bb26c | 2054 | note[3] = 8; /* strlen (name) + 1. */ |
56c1b507 | 2055 | note[7] = desc_size; /* Two N-byte offsets. */ |
864bb26c NC |
2056 | note[10] = NT_GNU_BUILD_ATTRIBUTE_OPEN >> 8; |
2057 | note[11] = NT_GNU_BUILD_ATTRIBUTE_OPEN & 0xff; | |
2058 | } | |
2059 | else | |
2060 | { | |
2061 | note[0] = 8; /* strlen (name) + 1. */ | |
56c1b507 | 2062 | note[4] = desc_size; /* Two N-byte offsets. */ |
864bb26c NC |
2063 | note[8] = NT_GNU_BUILD_ATTRIBUTE_OPEN & 0xff; |
2064 | note[9] = NT_GNU_BUILD_ATTRIBUTE_OPEN >> 8; | |
0df8ad28 | 2065 | } |
0df8ad28 | 2066 | |
864bb26c NC |
2067 | /* The a1 version number indicates that this note was |
2068 | generated by the assembler and not the gcc annobin plugin. */ | |
2069 | memcpy (note + 12, "GA$\ 13a1", 8); | |
2070 | ||
2071 | /* Create a relocation to install the start address of the note... */ | |
56c1b507 | 2072 | create_note_reloc (sec, sym, total_size, 20, desc_size / 2, desc_reloc, 0, note); |
864bb26c NC |
2073 | |
2074 | /* ...and another one to install the end address. */ | |
56c1b507 NC |
2075 | create_note_reloc (sec, sym, total_size, desc2_offset, |
2076 | desc_size / 2, | |
2077 | desc_reloc, | |
fd361982 | 2078 | bfd_section_size (bsym->section), |
864bb26c NC |
2079 | note); |
2080 | ||
d1bcae83 L |
2081 | /* Mark the section symbol used in relocation so that it will be |
2082 | included in the symbol table. */ | |
2083 | symbol_mark_used_in_reloc (sym); | |
2084 | ||
864bb26c NC |
2085 | total_size += note_size; |
2086 | /* FIXME: Maybe add a note recording the assembler command line and version ? */ | |
2087 | } | |
0df8ad28 NC |
2088 | |
2089 | /* Install the note(s) into the section. */ | |
864bb26c NC |
2090 | if (total_size) |
2091 | bfd_set_section_contents (stdoutput, sec, (bfd_byte *) note, 0, total_size); | |
0df8ad28 NC |
2092 | subsegs_finish_section (sec); |
2093 | relax_segment (seg_info (sec)->frchainP->frch_root, sec, 0); | |
2094 | size_seg (stdoutput, sec, NULL); | |
2095 | } | |
2096 | #endif /* OBJ_ELF */ | |
d98b0e2b | 2097 | |
252b5132 RH |
2098 | /* Write the object file. */ |
2099 | ||
2100 | void | |
d7342424 | 2101 | write_object_file (void) |
252b5132 | 2102 | { |
32638454 | 2103 | struct relax_seg_info rsi; |
7be1c489 | 2104 | #ifndef WORKING_DOT_WORD |
efaf0ba4 | 2105 | fragS *fragP; /* Track along all frags. */ |
252b5132 RH |
2106 | #endif |
2107 | ||
85024cd8 AM |
2108 | subsegs_finish (); |
2109 | ||
16a87420 IS |
2110 | #ifdef md_pre_output_hook |
2111 | md_pre_output_hook; | |
2112 | #endif | |
2113 | ||
cdaa5616 IS |
2114 | #ifdef md_pre_relax_hook |
2115 | md_pre_relax_hook; | |
2116 | #endif | |
2117 | ||
252b5132 | 2118 | /* From now on, we don't care about sub-segments. Build one frag chain |
2b0f3761 | 2119 | for each segment. Linked through fr_next. */ |
252b5132 | 2120 | |
252b5132 RH |
2121 | /* Remove the sections created by gas for its own purposes. */ |
2122 | { | |
252b5132 RH |
2123 | int i; |
2124 | ||
5daa8fe7 L |
2125 | bfd_section_list_remove (stdoutput, reg_section); |
2126 | bfd_section_list_remove (stdoutput, expr_section); | |
2127 | stdoutput->section_count -= 2; | |
252b5132 RH |
2128 | i = 0; |
2129 | bfd_map_over_sections (stdoutput, renumber_sections, &i); | |
2130 | } | |
2131 | ||
2132 | bfd_map_over_sections (stdoutput, chain_frchains_together, (char *) 0); | |
252b5132 RH |
2133 | |
2134 | /* We have two segments. If user gave -R flag, then we must put the | |
2135 | data frags into the text segment. Do this before relaxing so | |
2136 | we know to take advantage of -R and make shorter addresses. */ | |
252b5132 RH |
2137 | if (flag_readonly_data_in_text) |
2138 | { | |
2139 | merge_data_into_text (); | |
2140 | } | |
252b5132 | 2141 | |
32638454 | 2142 | rsi.pass = 0; |
e46d99eb AM |
2143 | while (1) |
2144 | { | |
aacb5251 HPN |
2145 | #ifndef WORKING_DOT_WORD |
2146 | /* We need to reset the markers in the broken word list and | |
2147 | associated frags between calls to relax_segment (via | |
2148 | relax_seg). Since the broken word list is global, we do it | |
2149 | once per round, rather than locally in relax_segment for each | |
2150 | segment. */ | |
2151 | struct broken_word *brokp; | |
2152 | ||
2153 | for (brokp = broken_words; | |
2154 | brokp != (struct broken_word *) NULL; | |
2155 | brokp = brokp->next_broken_word) | |
2156 | { | |
2157 | brokp->added = 0; | |
2158 | ||
2159 | if (brokp->dispfrag != (fragS *) NULL | |
2160 | && brokp->dispfrag->fr_type == rs_broken_word) | |
2161 | brokp->dispfrag->fr_subtype = 0; | |
2162 | } | |
2163 | #endif | |
2164 | ||
32638454 AM |
2165 | rsi.changed = 0; |
2166 | bfd_map_over_sections (stdoutput, relax_seg, &rsi); | |
2167 | rsi.pass++; | |
2168 | if (!rsi.changed) | |
e46d99eb AM |
2169 | break; |
2170 | } | |
e027f3e8 | 2171 | |
87548816 NC |
2172 | /* Note - Most ports will use the default value of |
2173 | TC_FINALIZE_SYMS_BEFORE_SIZE_SEG, which 1. This will force | |
2174 | local symbols to be resolved, removing their frag information. | |
2175 | Some ports however, will not have finished relaxing all of | |
2176 | their frags and will still need the local symbol frag | |
2177 | information. These ports can set | |
2178 | TC_FINALIZE_SYMS_BEFORE_SIZE_SEG to 0. */ | |
2179 | finalize_syms = TC_FINALIZE_SYMS_BEFORE_SIZE_SEG; | |
2180 | ||
e46d99eb | 2181 | bfd_map_over_sections (stdoutput, size_seg, (char *) 0); |
e46d99eb | 2182 | |
38b87a1b NC |
2183 | /* Relaxation has completed. Freeze all syms. */ |
2184 | finalize_syms = 1; | |
2185 | ||
ba8826a8 AO |
2186 | dwarf2dbg_final_check (); |
2187 | ||
e0001a05 NC |
2188 | #ifdef md_post_relax_hook |
2189 | md_post_relax_hook; | |
2190 | #endif | |
2191 | ||
d98b0e2b TG |
2192 | #ifdef OBJ_ELF |
2193 | if (IS_ELF) | |
2194 | create_obj_attrs_section (); | |
2195 | #endif | |
2196 | ||
252b5132 RH |
2197 | #ifndef WORKING_DOT_WORD |
2198 | { | |
2199 | struct broken_word *lie; | |
2200 | struct broken_word **prevP; | |
2201 | ||
2202 | prevP = &broken_words; | |
2203 | for (lie = broken_words; lie; lie = lie->next_broken_word) | |
2204 | if (!lie->added) | |
2205 | { | |
2206 | expressionS exp; | |
2207 | ||
2208 | subseg_change (lie->seg, lie->subseg); | |
2209 | exp.X_op = O_subtract; | |
2210 | exp.X_add_symbol = lie->add; | |
2211 | exp.X_op_symbol = lie->sub; | |
2212 | exp.X_add_number = lie->addnum; | |
252b5132 RH |
2213 | #ifdef TC_CONS_FIX_NEW |
2214 | TC_CONS_FIX_NEW (lie->frag, | |
efaf0ba4 | 2215 | lie->word_goes_here - lie->frag->fr_literal, |
62ebcb5c | 2216 | 2, &exp, TC_PARSE_CONS_RETURN_NONE); |
252b5132 RH |
2217 | #else |
2218 | fix_new_exp (lie->frag, | |
2219 | lie->word_goes_here - lie->frag->fr_literal, | |
2220 | 2, &exp, 0, BFD_RELOC_16); | |
2221 | #endif | |
252b5132 RH |
2222 | *prevP = lie->next_broken_word; |
2223 | } | |
2224 | else | |
2225 | prevP = &(lie->next_broken_word); | |
2226 | ||
2227 | for (lie = broken_words; lie;) | |
2228 | { | |
2229 | struct broken_word *untruth; | |
2230 | char *table_ptr; | |
2231 | addressT table_addr; | |
2232 | addressT from_addr, to_addr; | |
2233 | int n, m; | |
2234 | ||
2235 | subseg_change (lie->seg, lie->subseg); | |
2236 | fragP = lie->dispfrag; | |
2237 | ||
2238 | /* Find out how many broken_words go here. */ | |
2239 | n = 0; | |
efaf0ba4 NC |
2240 | for (untruth = lie; |
2241 | untruth && untruth->dispfrag == fragP; | |
2242 | untruth = untruth->next_broken_word) | |
252b5132 RH |
2243 | if (untruth->added == 1) |
2244 | n++; | |
2245 | ||
2246 | table_ptr = lie->dispfrag->fr_opcode; | |
efaf0ba4 NC |
2247 | table_addr = (lie->dispfrag->fr_address |
2248 | + (table_ptr - lie->dispfrag->fr_literal)); | |
252b5132 RH |
2249 | /* Create the jump around the long jumps. This is a short |
2250 | jump from table_ptr+0 to table_ptr+n*long_jump_size. */ | |
2251 | from_addr = table_addr; | |
2252 | to_addr = table_addr + md_short_jump_size + n * md_long_jump_size; | |
efaf0ba4 NC |
2253 | md_create_short_jump (table_ptr, from_addr, to_addr, lie->dispfrag, |
2254 | lie->add); | |
252b5132 RH |
2255 | table_ptr += md_short_jump_size; |
2256 | table_addr += md_short_jump_size; | |
2257 | ||
efaf0ba4 NC |
2258 | for (m = 0; |
2259 | lie && lie->dispfrag == fragP; | |
2260 | m++, lie = lie->next_broken_word) | |
252b5132 RH |
2261 | { |
2262 | if (lie->added == 2) | |
2263 | continue; | |
efaf0ba4 | 2264 | /* Patch the jump table. */ |
187af7df | 2265 | for (untruth = (struct broken_word *) (fragP->fr_symbol); |
efaf0ba4 NC |
2266 | untruth && untruth->dispfrag == fragP; |
2267 | untruth = untruth->next_broken_word) | |
252b5132 RH |
2268 | { |
2269 | if (untruth->use_jump == lie) | |
187af7df HPN |
2270 | { |
2271 | /* This is the offset from ??? to table_ptr+0. | |
2272 | The target is the same for all users of this | |
2273 | md_long_jump, but the "sub" bases (and hence the | |
2274 | offsets) may be different. */ | |
2275 | addressT to_word = table_addr - S_GET_VALUE (untruth->sub); | |
2276 | #ifdef TC_CHECK_ADJUSTED_BROKEN_DOT_WORD | |
2277 | TC_CHECK_ADJUSTED_BROKEN_DOT_WORD (to_word, untruth); | |
2278 | #endif | |
2279 | md_number_to_chars (untruth->word_goes_here, to_word, 2); | |
2280 | } | |
252b5132 RH |
2281 | } |
2282 | ||
efaf0ba4 NC |
2283 | /* Install the long jump. */ |
2284 | /* This is a long jump from table_ptr+0 to the final target. */ | |
252b5132 RH |
2285 | from_addr = table_addr; |
2286 | to_addr = S_GET_VALUE (lie->add) + lie->addnum; | |
efaf0ba4 NC |
2287 | md_create_long_jump (table_ptr, from_addr, to_addr, lie->dispfrag, |
2288 | lie->add); | |
252b5132 RH |
2289 | table_ptr += md_long_jump_size; |
2290 | table_addr += md_long_jump_size; | |
2291 | } | |
2292 | } | |
2293 | } | |
efaf0ba4 | 2294 | #endif /* not WORKING_DOT_WORD */ |
252b5132 | 2295 | |
252b5132 RH |
2296 | /* Resolve symbol values. This needs to be done before processing |
2297 | the relocations. */ | |
2298 | if (symbol_rootP) | |
2299 | { | |
2300 | symbolS *symp; | |
2301 | ||
2302 | for (symp = symbol_rootP; symp; symp = symbol_next (symp)) | |
6386f3a7 | 2303 | resolve_symbol_value (symp); |
252b5132 | 2304 | } |
49309057 | 2305 | resolve_local_symbol_values (); |
05e9452c | 2306 | resolve_reloc_expr_symbols (); |
252b5132 | 2307 | |
0df8ad28 NC |
2308 | #ifdef OBJ_ELF |
2309 | if (IS_ELF) | |
2310 | maybe_generate_build_notes (); | |
2311 | #endif | |
269b4ded | 2312 | |
252b5132 RH |
2313 | PROGRESS (1); |
2314 | ||
2315 | #ifdef tc_frob_file_before_adjust | |
2316 | tc_frob_file_before_adjust (); | |
2317 | #endif | |
2318 | #ifdef obj_frob_file_before_adjust | |
2319 | obj_frob_file_before_adjust (); | |
2320 | #endif | |
2321 | ||
efaf0ba4 | 2322 | bfd_map_over_sections (stdoutput, adjust_reloc_syms, (char *) 0); |
252b5132 | 2323 | |
a161fe53 AM |
2324 | #ifdef tc_frob_file_before_fix |
2325 | tc_frob_file_before_fix (); | |
2326 | #endif | |
2327 | #ifdef obj_frob_file_before_fix | |
2328 | obj_frob_file_before_fix (); | |
2329 | #endif | |
2330 | ||
2331 | bfd_map_over_sections (stdoutput, fix_segment, (char *) 0); | |
2332 | ||
252b5132 RH |
2333 | /* Set up symbol table, and write it out. */ |
2334 | if (symbol_rootP) | |
2335 | { | |
2336 | symbolS *symp; | |
5b7c81bd | 2337 | bool skip_next_symbol = false; |
252b5132 RH |
2338 | |
2339 | for (symp = symbol_rootP; symp; symp = symbol_next (symp)) | |
2340 | { | |
2341 | int punt = 0; | |
2342 | const char *name; | |
2343 | ||
aaac53f5 HPN |
2344 | if (skip_next_symbol) |
2345 | { | |
2346 | /* Don't do anything besides moving the value of the | |
2347 | symbol from the GAS value-field to the BFD value-field. */ | |
2348 | symbol_get_bfdsym (symp)->value = S_GET_VALUE (symp); | |
5b7c81bd | 2349 | skip_next_symbol = false; |
aaac53f5 HPN |
2350 | continue; |
2351 | } | |
2352 | ||
49309057 | 2353 | if (symbol_mri_common_p (symp)) |
252b5132 RH |
2354 | { |
2355 | if (S_IS_EXTERNAL (symp)) | |
2356 | as_bad (_("%s: global symbols not supported in common sections"), | |
2357 | S_GET_NAME (symp)); | |
2358 | symbol_remove (symp, &symbol_rootP, &symbol_lastP); | |
2359 | continue; | |
2360 | } | |
2361 | ||
2362 | name = S_GET_NAME (symp); | |
2363 | if (name) | |
2364 | { | |
efaf0ba4 NC |
2365 | const char *name2 = |
2366 | decode_local_label_name ((char *) S_GET_NAME (symp)); | |
252b5132 RH |
2367 | /* They only differ if `name' is a fb or dollar local |
2368 | label name. */ | |
2369 | if (name2 != name && ! S_IS_DEFINED (symp)) | |
0e389e77 | 2370 | as_bad (_("local label `%s' is not defined"), name2); |
252b5132 RH |
2371 | } |
2372 | ||
2373 | /* Do it again, because adjust_reloc_syms might introduce | |
2374 | more symbols. They'll probably only be section symbols, | |
2375 | but they'll still need to have the values computed. */ | |
6386f3a7 | 2376 | resolve_symbol_value (symp); |
252b5132 RH |
2377 | |
2378 | /* Skip symbols which were equated to undefined or common | |
b4b24b79 | 2379 | symbols. */ |
06e77878 AO |
2380 | if (symbol_equated_reloc_p (symp) |
2381 | || S_IS_WEAKREFR (symp)) | |
252b5132 | 2382 | { |
91d6fa6a NC |
2383 | const char *sname = S_GET_NAME (symp); |
2384 | ||
60938e80 | 2385 | if (S_IS_COMMON (symp) |
91d6fa6a | 2386 | && !TC_FAKE_LABEL (sname) |
76db0a2e | 2387 | && !S_IS_WEAKREFR (symp)) |
60938e80 L |
2388 | { |
2389 | expressionS *e = symbol_get_value_expression (symp); | |
91d6fa6a | 2390 | |
76db0a2e | 2391 | as_bad (_("`%s' can't be equated to common symbol `%s'"), |
91d6fa6a | 2392 | sname, S_GET_NAME (e->X_add_symbol)); |
60938e80 | 2393 | } |
d0548f34 L |
2394 | if (S_GET_SEGMENT (symp) == reg_section) |
2395 | { | |
2396 | /* Report error only if we know the symbol name. */ | |
2397 | if (S_GET_NAME (symp) != reg_section->name) | |
2398 | as_bad (_("can't make global register symbol `%s'"), | |
91d6fa6a | 2399 | sname); |
d0548f34 | 2400 | } |
252b5132 RH |
2401 | symbol_remove (symp, &symbol_rootP, &symbol_lastP); |
2402 | continue; | |
2403 | } | |
2404 | ||
252b5132 RH |
2405 | #ifdef obj_frob_symbol |
2406 | obj_frob_symbol (symp, punt); | |
2407 | #endif | |
2408 | #ifdef tc_frob_symbol | |
49309057 | 2409 | if (! punt || symbol_used_in_reloc_p (symp)) |
252b5132 RH |
2410 | tc_frob_symbol (symp, punt); |
2411 | #endif | |
2412 | ||
2413 | /* If we don't want to keep this symbol, splice it out of | |
2414 | the chain now. If EMIT_SECTION_SYMBOLS is 0, we never | |
2415 | want section symbols. Otherwise, we skip local symbols | |
2416 | and symbols that the frob_symbol macros told us to punt, | |
2417 | but we keep such symbols if they are used in relocs. */ | |
a161fe53 AM |
2418 | if (symp == abs_section_sym |
2419 | || (! EMIT_SECTION_SYMBOLS | |
2420 | && symbol_section_p (symp)) | |
e97b3f28 | 2421 | /* Note that S_IS_EXTERNAL and S_IS_LOCAL are not always |
252b5132 RH |
2422 | opposites. Sometimes the former checks flags and the |
2423 | latter examines the name... */ | |
e97b3f28 | 2424 | || (!S_IS_EXTERNAL (symp) |
461b725f AO |
2425 | && (punt || S_IS_LOCAL (symp) || |
2426 | (S_IS_WEAKREFD (symp) && ! symbol_used_p (symp))) | |
49309057 | 2427 | && ! symbol_used_in_reloc_p (symp))) |
252b5132 RH |
2428 | { |
2429 | symbol_remove (symp, &symbol_rootP, &symbol_lastP); | |
efaf0ba4 | 2430 | |
252b5132 RH |
2431 | /* After symbol_remove, symbol_next(symp) still returns |
2432 | the one that came after it in the chain. So we don't | |
2433 | need to do any extra cleanup work here. */ | |
252b5132 RH |
2434 | continue; |
2435 | } | |
2436 | ||
2437 | /* Make sure we really got a value for the symbol. */ | |
49309057 | 2438 | if (! symbol_resolved_p (symp)) |
252b5132 | 2439 | { |
0e389e77 | 2440 | as_bad (_("can't resolve value for symbol `%s'"), |
252b5132 | 2441 | S_GET_NAME (symp)); |
49309057 | 2442 | symbol_mark_resolved (symp); |
252b5132 RH |
2443 | } |
2444 | ||
2445 | /* Set the value into the BFD symbol. Up til now the value | |
2446 | has only been kept in the gas symbolS struct. */ | |
49309057 | 2447 | symbol_get_bfdsym (symp)->value = S_GET_VALUE (symp); |
aaac53f5 HPN |
2448 | |
2449 | /* A warning construct is a warning symbol followed by the | |
2450 | symbol warned about. Don't let anything object-format or | |
2451 | target-specific muck with it; it's ready for output. */ | |
2452 | if (symbol_get_bfdsym (symp)->flags & BSF_WARNING) | |
5b7c81bd | 2453 | skip_next_symbol = true; |
252b5132 RH |
2454 | } |
2455 | } | |
2456 | ||
2457 | PROGRESS (1); | |
2458 | ||
2459 | /* Now do any format-specific adjustments to the symbol table, such | |
2460 | as adding file symbols. */ | |
2461 | #ifdef tc_adjust_symtab | |
2462 | tc_adjust_symtab (); | |
2463 | #endif | |
2464 | #ifdef obj_adjust_symtab | |
2465 | obj_adjust_symtab (); | |
2466 | #endif | |
2467 | ||
d0548f34 | 2468 | /* Stop if there is an error. */ |
82194874 | 2469 | if (!flag_always_generate_output && had_errors ()) |
d0548f34 L |
2470 | return; |
2471 | ||
252b5132 RH |
2472 | /* Now that all the sizes are known, and contents correct, we can |
2473 | start writing to the file. */ | |
2ae08483 | 2474 | set_symtab (); |
252b5132 RH |
2475 | |
2476 | /* If *_frob_file changes the symbol value at this point, it is | |
2477 | responsible for moving the changed value into symp->bsym->value | |
2478 | as well. Hopefully all symbol value changing can be done in | |
2479 | *_frob_symbol. */ | |
2480 | #ifdef tc_frob_file | |
2481 | tc_frob_file (); | |
2482 | #endif | |
2483 | #ifdef obj_frob_file | |
2484 | obj_frob_file (); | |
2485 | #endif | |
f3d2b04b KT |
2486 | #ifdef obj_coff_generate_pdata |
2487 | obj_coff_generate_pdata (); | |
2488 | #endif | |
0df8ad28 | 2489 | |
252b5132 RH |
2490 | bfd_map_over_sections (stdoutput, write_relocs, (char *) 0); |
2491 | ||
f1c2d4af | 2492 | #ifdef tc_frob_file_after_relocs |
252b5132 RH |
2493 | tc_frob_file_after_relocs (); |
2494 | #endif | |
2495 | #ifdef obj_frob_file_after_relocs | |
2496 | obj_frob_file_after_relocs (); | |
2497 | #endif | |
f1c2d4af | 2498 | |
b8871f35 L |
2499 | #if defined OBJ_ELF || defined OBJ_MAYBE_ELF |
2500 | if (IS_ELF && flag_use_elf_stt_common) | |
2501 | stdoutput->flags |= BFD_CONVERT_ELF_COMMON | BFD_USE_ELF_STT_COMMON; | |
2502 | #endif | |
2503 | ||
0acf065b CC |
2504 | /* Once all relocations have been written, we can compress the |
2505 | contents of the debug sections. This needs to be done before | |
2506 | we start writing any sections, because it will affect the file | |
2507 | layout, which is fixed once we start writing contents. */ | |
2508 | if (flag_compress_debug) | |
8ecb73dd L |
2509 | { |
2510 | if (flag_compress_debug == COMPRESS_DEBUG_GABI_ZLIB) | |
2511 | stdoutput->flags |= BFD_COMPRESS | BFD_COMPRESS_GABI; | |
2512 | else | |
2513 | stdoutput->flags |= BFD_COMPRESS; | |
2514 | bfd_map_over_sections (stdoutput, compress_debug, (char *) 0); | |
2515 | } | |
0acf065b | 2516 | |
252b5132 | 2517 | bfd_map_over_sections (stdoutput, write_contents, (char *) 0); |
252b5132 | 2518 | } |
252b5132 RH |
2519 | |
2520 | #ifdef TC_GENERIC_RELAX_TABLE | |
b65d68b8 L |
2521 | #ifndef md_generic_table_relax_frag |
2522 | #define md_generic_table_relax_frag relax_frag | |
2523 | #endif | |
2524 | ||
252b5132 RH |
2525 | /* Relax a fragment by scanning TC_GENERIC_RELAX_TABLE. */ |
2526 | ||
2527 | long | |
d7342424 | 2528 | relax_frag (segT segment, fragS *fragP, long stretch) |
252b5132 RH |
2529 | { |
2530 | const relax_typeS *this_type; | |
2531 | const relax_typeS *start_type; | |
2532 | relax_substateT next_state; | |
2533 | relax_substateT this_state; | |
685736be | 2534 | offsetT growth; |
38686296 AM |
2535 | offsetT aim; |
2536 | addressT target; | |
2537 | addressT address; | |
2538 | symbolS *symbolP; | |
2539 | const relax_typeS *table; | |
2540 | ||
2541 | target = fragP->fr_offset; | |
37a58883 | 2542 | address = fragP->fr_address + fragP->fr_fix; |
38686296 | 2543 | table = TC_GENERIC_RELAX_TABLE; |
252b5132 RH |
2544 | this_state = fragP->fr_subtype; |
2545 | start_type = this_type = table + this_state; | |
38686296 | 2546 | symbolP = fragP->fr_symbol; |
252b5132 RH |
2547 | |
2548 | if (symbolP) | |
2549 | { | |
c842b53a ILT |
2550 | fragS *sym_frag; |
2551 | ||
2552 | sym_frag = symbol_get_frag (symbolP); | |
2553 | ||
252b5132 | 2554 | #ifndef DIFF_EXPR_OK |
c842b53a | 2555 | know (sym_frag != NULL); |
252b5132 | 2556 | #endif |
a161fe53 | 2557 | know (S_GET_SEGMENT (symbolP) != absolute_section |
c842b53a | 2558 | || sym_frag == &zero_address_frag); |
ac62c346 | 2559 | target += S_GET_VALUE (symbolP); |
252b5132 | 2560 | |
e35a414d AM |
2561 | /* If SYM_FRAG has yet to be reached on this pass, assume it |
2562 | will move by STRETCH just as we did, unless there is an | |
2563 | alignment frag between here and SYM_FRAG. An alignment may | |
2564 | well absorb any STRETCH, and we don't want to choose a larger | |
2565 | branch insn by overestimating the needed reach of this | |
2566 | branch. It isn't critical to calculate TARGET exactly; We | |
2567 | know we'll be doing another pass if STRETCH is non-zero. */ | |
252b5132 | 2568 | |
c842b53a | 2569 | if (stretch != 0 |
38686296 AM |
2570 | && sym_frag->relax_marker != fragP->relax_marker |
2571 | && S_GET_SEGMENT (symbolP) == segment) | |
252b5132 | 2572 | { |
e35a414d AM |
2573 | if (stretch < 0 |
2574 | || sym_frag->region == fragP->region) | |
2575 | target += stretch; | |
e5940dff AM |
2576 | /* If we get here we know we have a forward branch. This |
2577 | relax pass may have stretched previous instructions so | |
2578 | far that omitting STRETCH would make the branch | |
2579 | negative. Don't allow this in case the negative reach is | |
2580 | large enough to require a larger branch instruction. */ | |
2581 | else if (target < address) | |
37a58883 | 2582 | return 0; |
252b5132 RH |
2583 | } |
2584 | } | |
2585 | ||
37a58883 | 2586 | aim = target - address; |
252b5132 | 2587 | #ifdef TC_PCREL_ADJUST |
37a58883 | 2588 | /* Currently only the ns32k and arc needs this. */ |
efaf0ba4 | 2589 | aim += TC_PCREL_ADJUST (fragP); |
efaf0ba4 | 2590 | #endif |
59c871b4 BE |
2591 | |
2592 | #ifdef md_prepare_relax_scan | |
2593 | /* Formerly called M68K_AIM_KLUDGE. */ | |
252b5132 RH |
2594 | md_prepare_relax_scan (fragP, address, aim, this_state, this_type); |
2595 | #endif | |
2596 | ||
2597 | if (aim < 0) | |
2598 | { | |
efaf0ba4 | 2599 | /* Look backwards. */ |
252b5132 RH |
2600 | for (next_state = this_type->rlx_more; next_state;) |
2601 | if (aim >= this_type->rlx_backward) | |
2602 | next_state = 0; | |
2603 | else | |
2604 | { | |
efaf0ba4 | 2605 | /* Grow to next state. */ |
252b5132 RH |
2606 | this_state = next_state; |
2607 | this_type = table + this_state; | |
2608 | next_state = this_type->rlx_more; | |
2609 | } | |
2610 | } | |
2611 | else | |
2612 | { | |
efaf0ba4 | 2613 | /* Look forwards. */ |
252b5132 RH |
2614 | for (next_state = this_type->rlx_more; next_state;) |
2615 | if (aim <= this_type->rlx_forward) | |
2616 | next_state = 0; | |
2617 | else | |
2618 | { | |
efaf0ba4 | 2619 | /* Grow to next state. */ |
252b5132 RH |
2620 | this_state = next_state; |
2621 | this_type = table + this_state; | |
2622 | next_state = this_type->rlx_more; | |
2623 | } | |
2624 | } | |
2625 | ||
2626 | growth = this_type->rlx_length - start_type->rlx_length; | |
2627 | if (growth != 0) | |
2628 | fragP->fr_subtype = this_state; | |
2629 | return growth; | |
2630 | } | |
2631 | ||
efaf0ba4 | 2632 | #endif /* defined (TC_GENERIC_RELAX_TABLE) */ |
252b5132 RH |
2633 | |
2634 | /* Relax_align. Advance location counter to next address that has 'alignment' | |
2635 | lowest order bits all 0s, return size of adjustment made. */ | |
2636 | static relax_addressT | |
ed9e98c2 AM |
2637 | relax_align (relax_addressT address, /* Address now. */ |
2638 | int alignment /* Alignment (binary). */) | |
252b5132 RH |
2639 | { |
2640 | relax_addressT mask; | |
2641 | relax_addressT new_address; | |
2642 | ||
65879393 | 2643 | mask = ~((relax_addressT) ~0 << alignment); |
252b5132 RH |
2644 | new_address = (address + mask) & (~mask); |
2645 | #ifdef LINKER_RELAXING_SHRINKS_ONLY | |
2646 | if (linkrelax) | |
2647 | /* We must provide lots of padding, so the linker can discard it | |
2648 | when needed. The linker will not add extra space, ever. */ | |
2649 | new_address += (1 << alignment); | |
2650 | #endif | |
2651 | return (new_address - address); | |
2652 | } | |
2653 | ||
efaf0ba4 NC |
2654 | /* Now we have a segment, not a crowd of sub-segments, we can make |
2655 | fr_address values. | |
58a77e41 | 2656 | |
efaf0ba4 | 2657 | Relax the frags. |
58a77e41 | 2658 | |
efaf0ba4 NC |
2659 | After this, all frags in this segment have addresses that are correct |
2660 | within the segment. Since segments live in different file addresses, | |
2661 | these frag addresses may not be the same as final object-file | |
2662 | addresses. */ | |
2663 | ||
e46d99eb | 2664 | int |
32638454 | 2665 | relax_segment (struct frag *segment_frag_root, segT segment, int pass) |
252b5132 | 2666 | { |
4111faa5 NC |
2667 | unsigned long frag_count; |
2668 | struct frag *fragP; | |
2669 | relax_addressT address; | |
e35a414d | 2670 | int region; |
e46d99eb AM |
2671 | int ret; |
2672 | ||
efaf0ba4 | 2673 | /* In case md_estimate_size_before_relax() wants to make fixSs. */ |
252b5132 RH |
2674 | subseg_change (segment, 0); |
2675 | ||
2676 | /* For each frag in segment: count and store (a 1st guess of) | |
2677 | fr_address. */ | |
2678 | address = 0; | |
e35a414d | 2679 | region = 0; |
4111faa5 NC |
2680 | for (frag_count = 0, fragP = segment_frag_root; |
2681 | fragP; | |
2682 | fragP = fragP->fr_next, frag_count ++) | |
252b5132 | 2683 | { |
e35a414d | 2684 | fragP->region = region; |
38686296 | 2685 | fragP->relax_marker = 0; |
252b5132 RH |
2686 | fragP->fr_address = address; |
2687 | address += fragP->fr_fix; | |
2688 | ||
2689 | switch (fragP->fr_type) | |
2690 | { | |
2691 | case rs_fill: | |
2692 | address += fragP->fr_offset * fragP->fr_var; | |
2693 | break; | |
2694 | ||
2695 | case rs_align: | |
2696 | case rs_align_code: | |
0a9ef439 | 2697 | case rs_align_test: |
252b5132 RH |
2698 | { |
2699 | addressT offset = relax_align (address, (int) fragP->fr_offset); | |
2700 | ||
2701 | if (fragP->fr_subtype != 0 && offset > fragP->fr_subtype) | |
2702 | offset = 0; | |
2703 | ||
2704 | if (offset % fragP->fr_var != 0) | |
2705 | { | |
54d3cad9 | 2706 | as_bad_where (fragP->fr_file, fragP->fr_line, |
992a06ee AM |
2707 | ngettext ("alignment padding (%lu byte) " |
2708 | "not a multiple of %ld", | |
2709 | "alignment padding (%lu bytes) " | |
2710 | "not a multiple of %ld", | |
2711 | (unsigned long) offset), | |
54d3cad9 | 2712 | (unsigned long) offset, (long) fragP->fr_var); |
252b5132 RH |
2713 | offset -= (offset % fragP->fr_var); |
2714 | } | |
2715 | ||
2716 | address += offset; | |
e35a414d | 2717 | region += 1; |
252b5132 RH |
2718 | } |
2719 | break; | |
2720 | ||
2721 | case rs_org: | |
252b5132 | 2722 | /* Assume .org is nugatory. It will grow with 1st relax. */ |
e35a414d AM |
2723 | region += 1; |
2724 | break; | |
2725 | ||
2726 | case rs_space: | |
62a02d25 | 2727 | case rs_space_nop: |
252b5132 RH |
2728 | break; |
2729 | ||
2730 | case rs_machine_dependent: | |
e0890092 AM |
2731 | /* If fr_symbol is an expression, this call to |
2732 | resolve_symbol_value sets up the correct segment, which will | |
2733 | likely be needed in md_estimate_size_before_relax. */ | |
2734 | if (fragP->fr_symbol) | |
2735 | resolve_symbol_value (fragP->fr_symbol); | |
2736 | ||
252b5132 RH |
2737 | address += md_estimate_size_before_relax (fragP, segment); |
2738 | break; | |
2739 | ||
2740 | #ifndef WORKING_DOT_WORD | |
efaf0ba4 | 2741 | /* Broken words don't concern us yet. */ |
252b5132 RH |
2742 | case rs_broken_word: |
2743 | break; | |
2744 | #endif | |
2745 | ||
2746 | case rs_leb128: | |
efaf0ba4 | 2747 | /* Initial guess is always 1; doing otherwise can result in |
252b5132 RH |
2748 | stable solutions that are larger than the minimum. */ |
2749 | address += fragP->fr_offset = 1; | |
2750 | break; | |
2751 | ||
2752 | case rs_cfa: | |
2753 | address += eh_frame_estimate_size_before_relax (fragP); | |
2754 | break; | |
2755 | ||
220e750f RH |
2756 | case rs_dwarf2dbg: |
2757 | address += dwarf2dbg_estimate_size_before_relax (fragP); | |
2758 | break; | |
2759 | ||
252b5132 RH |
2760 | default: |
2761 | BAD_CASE (fragP->fr_type); | |
2762 | break; | |
efaf0ba4 NC |
2763 | } |
2764 | } | |
252b5132 RH |
2765 | |
2766 | /* Do relax(). */ | |
2767 | { | |
4111faa5 | 2768 | unsigned long max_iterations; |
d1c5f158 AM |
2769 | |
2770 | /* Cumulative address adjustment. */ | |
2771 | offsetT stretch; | |
2772 | ||
2773 | /* Have we made any adjustment this pass? We can't just test | |
2774 | stretch because one piece of code may have grown and another | |
2775 | shrank. */ | |
2776 | int stretched; | |
2777 | ||
2778 | /* Most horrible, but gcc may give us some exception data that | |
2779 | is impossible to assemble, of the form | |
2780 | ||
2781 | .align 4 | |
2782 | .byte 0, 0 | |
2783 | .uleb128 end - start | |
2784 | start: | |
2785 | .space 128*128 - 1 | |
2786 | .align 4 | |
2787 | end: | |
2788 | ||
2789 | If the leb128 is two bytes in size, then end-start is 128*128, | |
2790 | which requires a three byte leb128. If the leb128 is three | |
2791 | bytes in size, then end-start is 128*128-1, which requires a | |
2792 | two byte leb128. We work around this dilemma by inserting | |
2793 | an extra 4 bytes of alignment just after the .align. This | |
2794 | works because the data after the align is accessed relative to | |
2795 | the end label. | |
2796 | ||
2797 | This counter is used in a tiny state machine to detect | |
2798 | whether a leb128 followed by an align is impossible to | |
2799 | relax. */ | |
2800 | int rs_leb128_fudge = 0; | |
252b5132 | 2801 | |
4111faa5 NC |
2802 | /* We want to prevent going into an infinite loop where one frag grows |
2803 | depending upon the location of a symbol which is in turn moved by | |
2804 | the growing frag. eg: | |
2805 | ||
b4b24b79 AM |
2806 | foo = . |
2807 | .org foo+16 | |
2808 | foo = . | |
4111faa5 | 2809 | |
b4b24b79 | 2810 | So we dictate that this algorithm can be at most O2. */ |
4111faa5 NC |
2811 | max_iterations = frag_count * frag_count; |
2812 | /* Check for overflow. */ | |
2813 | if (max_iterations < frag_count) | |
2814 | max_iterations = frag_count; | |
2815 | ||
32638454 | 2816 | ret = 0; |
252b5132 RH |
2817 | do |
2818 | { | |
e46d99eb AM |
2819 | stretch = 0; |
2820 | stretched = 0; | |
58a77e41 | 2821 | |
252b5132 RH |
2822 | for (fragP = segment_frag_root; fragP; fragP = fragP->fr_next) |
2823 | { | |
685736be | 2824 | offsetT growth = 0; |
252b5132 RH |
2825 | addressT was_address; |
2826 | offsetT offset; | |
2827 | symbolS *symbolP; | |
2828 | ||
38686296 | 2829 | fragP->relax_marker ^= 1; |
252b5132 RH |
2830 | was_address = fragP->fr_address; |
2831 | address = fragP->fr_address += stretch; | |
2832 | symbolP = fragP->fr_symbol; | |
2833 | offset = fragP->fr_offset; | |
2834 | ||
2835 | switch (fragP->fr_type) | |
2836 | { | |
efaf0ba4 | 2837 | case rs_fill: /* .fill never relaxes. */ |
252b5132 RH |
2838 | growth = 0; |
2839 | break; | |
2840 | ||
2841 | #ifndef WORKING_DOT_WORD | |
2842 | /* JF: This is RMS's idea. I do *NOT* want to be blamed | |
2843 | for it I do not want to write it. I do not want to have | |
2844 | anything to do with it. This is not the proper way to | |
2845 | implement this misfeature. */ | |
2846 | case rs_broken_word: | |
2847 | { | |
2848 | struct broken_word *lie; | |
2849 | struct broken_word *untruth; | |
2850 | ||
2851 | /* Yes this is ugly (storing the broken_word pointer | |
2852 | in the symbol slot). Still, this whole chunk of | |
2853 | code is ugly, and I don't feel like doing anything | |
2854 | about it. Think of it as stubbornness in action. */ | |
2855 | growth = 0; | |
2856 | for (lie = (struct broken_word *) (fragP->fr_symbol); | |
2857 | lie && lie->dispfrag == fragP; | |
2858 | lie = lie->next_broken_word) | |
2859 | { | |
2860 | ||
2861 | if (lie->added) | |
2862 | continue; | |
2863 | ||
ac62c346 | 2864 | offset = (S_GET_VALUE (lie->add) |
252b5132 | 2865 | + lie->addnum |
ac62c346 | 2866 | - S_GET_VALUE (lie->sub)); |
252b5132 RH |
2867 | if (offset <= -32768 || offset >= 32767) |
2868 | { | |
2869 | if (flag_warn_displacement) | |
2870 | { | |
2871 | char buf[50]; | |
9a8041fd JB |
2872 | |
2873 | bfd_sprintf_vma (stdoutput, buf, | |
2874 | (addressT) lie->addnum); | |
54d3cad9 AM |
2875 | as_warn_where (fragP->fr_file, fragP->fr_line, |
2876 | _(".word %s-%s+%s didn't fit"), | |
2877 | S_GET_NAME (lie->add), | |
2878 | S_GET_NAME (lie->sub), | |
2879 | buf); | |
252b5132 | 2880 | } |
252b5132 RH |
2881 | if (fragP->fr_subtype == 0) |
2882 | { | |
2883 | fragP->fr_subtype++; | |
2884 | growth += md_short_jump_size; | |
2885 | } | |
187af7df HPN |
2886 | |
2887 | /* Redirect *all* words of this table with the same | |
2888 | target, lest we have to handle the case where the | |
2889 | same target but with a offset that fits on this | |
2890 | round overflows at the next relaxation round. */ | |
2891 | for (untruth = (struct broken_word *) (fragP->fr_symbol); | |
252b5132 RH |
2892 | untruth && untruth->dispfrag == lie->dispfrag; |
2893 | untruth = untruth->next_broken_word) | |
49309057 ILT |
2894 | if ((symbol_get_frag (untruth->add) |
2895 | == symbol_get_frag (lie->add)) | |
2896 | && (S_GET_VALUE (untruth->add) | |
2897 | == S_GET_VALUE (lie->add))) | |
252b5132 RH |
2898 | { |
2899 | untruth->added = 2; | |
2900 | untruth->use_jump = lie; | |
2901 | } | |
187af7df HPN |
2902 | |
2903 | lie->added = 1; | |
252b5132 RH |
2904 | growth += md_long_jump_size; |
2905 | } | |
2906 | } | |
2907 | ||
2908 | break; | |
efaf0ba4 | 2909 | } /* case rs_broken_word */ |
252b5132 RH |
2910 | #endif |
2911 | case rs_align: | |
2912 | case rs_align_code: | |
0a9ef439 | 2913 | case rs_align_test: |
252b5132 RH |
2914 | { |
2915 | addressT oldoff, newoff; | |
2916 | ||
2917 | oldoff = relax_align (was_address + fragP->fr_fix, | |
2918 | (int) offset); | |
2919 | newoff = relax_align (address + fragP->fr_fix, | |
2920 | (int) offset); | |
2921 | ||
2922 | if (fragP->fr_subtype != 0) | |
2923 | { | |
2924 | if (oldoff > fragP->fr_subtype) | |
2925 | oldoff = 0; | |
2926 | if (newoff > fragP->fr_subtype) | |
2927 | newoff = 0; | |
2928 | } | |
2929 | ||
2930 | growth = newoff - oldoff; | |
d1c5f158 AM |
2931 | |
2932 | /* If this align happens to follow a leb128 and | |
2933 | we have determined that the leb128 is bouncing | |
2934 | in size, then break the cycle by inserting an | |
2935 | extra alignment. */ | |
2936 | if (growth < 0 | |
2937 | && (rs_leb128_fudge & 16) != 0 | |
2938 | && (rs_leb128_fudge & 15) >= 2) | |
2939 | { | |
2940 | segment_info_type *seginfo = seg_info (segment); | |
2941 | struct obstack *ob = &seginfo->frchainP->frch_obstack; | |
2942 | struct frag *newf; | |
2943 | ||
2944 | newf = frag_alloc (ob); | |
2945 | obstack_blank_fast (ob, fragP->fr_var); | |
2946 | obstack_finish (ob); | |
2947 | memcpy (newf, fragP, SIZEOF_STRUCT_FRAG); | |
2948 | memcpy (newf->fr_literal, | |
2949 | fragP->fr_literal + fragP->fr_fix, | |
2950 | fragP->fr_var); | |
2951 | newf->fr_type = rs_fill; | |
20f5cfbd | 2952 | newf->fr_address = address + fragP->fr_fix + newoff; |
d1c5f158 AM |
2953 | newf->fr_fix = 0; |
2954 | newf->fr_offset = (((offsetT) 1 << fragP->fr_offset) | |
2955 | / fragP->fr_var); | |
2956 | if (newf->fr_offset * newf->fr_var | |
2957 | != (offsetT) 1 << fragP->fr_offset) | |
2958 | { | |
2959 | newf->fr_offset = (offsetT) 1 << fragP->fr_offset; | |
2960 | newf->fr_var = 1; | |
2961 | } | |
20f5cfbd | 2962 | /* Include size of new frag in GROWTH. */ |
d1c5f158 | 2963 | growth += newf->fr_offset * newf->fr_var; |
20f5cfbd AM |
2964 | /* Adjust the new frag address for the amount |
2965 | we'll add when we process the new frag. */ | |
2966 | newf->fr_address -= stretch + growth; | |
d1c5f158 AM |
2967 | newf->relax_marker ^= 1; |
2968 | fragP->fr_next = newf; | |
2969 | #ifdef DEBUG | |
2970 | as_warn (_("padding added")); | |
2971 | #endif | |
2972 | } | |
252b5132 RH |
2973 | } |
2974 | break; | |
2975 | ||
2976 | case rs_org: | |
2977 | { | |
c39c821c | 2978 | offsetT target = offset; |
e46d99eb | 2979 | addressT after; |
252b5132 RH |
2980 | |
2981 | if (symbolP) | |
2982 | { | |
b4b24b79 AM |
2983 | /* Convert from an actual address to an octet offset |
2984 | into the section. Here it is assumed that the | |
2985 | section's VMA is zero, and can omit subtracting it | |
2986 | from the symbol's value to get the address offset. */ | |
2987 | know (S_GET_SEGMENT (symbolP)->vma == 0); | |
6e917903 | 2988 | target += S_GET_VALUE (symbolP) * OCTETS_PER_BYTE; |
ac62c346 | 2989 | } |
252b5132 RH |
2990 | |
2991 | know (fragP->fr_next); | |
6afe8e98 | 2992 | after = fragP->fr_next->fr_address + stretch; |
252b5132 | 2993 | growth = target - after; |
9875b365 MR |
2994 | |
2995 | /* Growth may be negative, but variable part of frag | |
2996 | cannot have fewer than 0 chars. That is, we can't | |
2997 | .org backwards. */ | |
c39c821c | 2998 | if ((offsetT) (address + fragP->fr_fix) > target) |
252b5132 | 2999 | { |
32638454 AM |
3000 | growth = 0; |
3001 | ||
3002 | /* Don't error on first few frag relax passes. | |
3003 | The symbol might be an expression involving | |
3004 | symbol values from other sections. If those | |
3005 | sections have not yet been processed their | |
3006 | frags will all have zero addresses, so we | |
3007 | will calculate incorrect values for them. The | |
3008 | number of passes we allow before giving an | |
3009 | error is somewhat arbitrary. It should be at | |
3010 | least one, with larger values requiring | |
3011 | increasingly contrived dependencies between | |
3012 | frags to trigger a false error. */ | |
3013 | if (pass < 2) | |
3014 | { | |
3015 | /* Force another pass. */ | |
3016 | ret = 1; | |
3017 | break; | |
3018 | } | |
3019 | ||
14ad458a | 3020 | as_bad_where (fragP->fr_file, fragP->fr_line, |
685736be | 3021 | _("attempt to move .org backwards")); |
14ad458a ILT |
3022 | |
3023 | /* We've issued an error message. Change the | |
b4b24b79 | 3024 | frag to avoid cascading errors. */ |
14ad458a ILT |
3025 | fragP->fr_type = rs_align; |
3026 | fragP->fr_subtype = 0; | |
3027 | fragP->fr_offset = 0; | |
6afe8e98 | 3028 | fragP->fr_fix = after - address; |
252b5132 | 3029 | } |
252b5132 | 3030 | } |
6afe8e98 | 3031 | break; |
252b5132 RH |
3032 | |
3033 | case rs_space: | |
62a02d25 | 3034 | case rs_space_nop: |
54d3cad9 | 3035 | growth = 0; |
252b5132 RH |
3036 | if (symbolP) |
3037 | { | |
766c03c9 AM |
3038 | offsetT amount; |
3039 | ||
3040 | amount = S_GET_VALUE (symbolP); | |
9e40345d | 3041 | if (S_GET_SEGMENT (symbolP) != absolute_section |
252b5132 RH |
3042 | || S_IS_COMMON (symbolP) |
3043 | || ! S_IS_DEFINED (symbolP)) | |
252b5132 | 3044 | { |
54d3cad9 | 3045 | as_bad_where (fragP->fr_file, fragP->fr_line, |
b1766e7c | 3046 | _(".space, .nops or .fill specifies non-absolute value")); |
54d3cad9 AM |
3047 | /* Prevent repeat of this error message. */ |
3048 | fragP->fr_symbol = 0; | |
3049 | } | |
3050 | else if (amount < 0) | |
3051 | { | |
32638454 AM |
3052 | /* Don't error on first few frag relax passes. |
3053 | See rs_org comment for a longer explanation. */ | |
3054 | if (pass < 2) | |
3055 | { | |
3056 | ret = 1; | |
3057 | break; | |
3058 | } | |
3059 | ||
54d3cad9 | 3060 | as_warn_where (fragP->fr_file, fragP->fr_line, |
8f065d3b | 3061 | _(".space, .nops or .fill with negative value, ignored")); |
766c03c9 | 3062 | fragP->fr_symbol = 0; |
252b5132 | 3063 | } |
54d3cad9 | 3064 | else |
050be34e | 3065 | growth = (was_address + fragP->fr_fix + amount |
54d3cad9 | 3066 | - fragP->fr_next->fr_address); |
252b5132 | 3067 | } |
252b5132 RH |
3068 | break; |
3069 | ||
3070 | case rs_machine_dependent: | |
3071 | #ifdef md_relax_frag | |
c842b53a | 3072 | growth = md_relax_frag (segment, fragP, stretch); |
252b5132 RH |
3073 | #else |
3074 | #ifdef TC_GENERIC_RELAX_TABLE | |
3075 | /* The default way to relax a frag is to look through | |
3076 | TC_GENERIC_RELAX_TABLE. */ | |
b65d68b8 L |
3077 | growth = md_generic_table_relax_frag (segment, fragP, |
3078 | stretch); | |
efaf0ba4 | 3079 | #endif /* TC_GENERIC_RELAX_TABLE */ |
252b5132 RH |
3080 | #endif |
3081 | break; | |
3082 | ||
3083 | case rs_leb128: | |
3084 | { | |
3085 | valueT value; | |
685736be | 3086 | offsetT size; |
252b5132 | 3087 | |
6386f3a7 | 3088 | value = resolve_symbol_value (fragP->fr_symbol); |
252b5132 RH |
3089 | size = sizeof_leb128 (value, fragP->fr_subtype); |
3090 | growth = size - fragP->fr_offset; | |
3091 | fragP->fr_offset = size; | |
3092 | } | |
3093 | break; | |
3094 | ||
3095 | case rs_cfa: | |
3096 | growth = eh_frame_relax_frag (fragP); | |
3097 | break; | |
3098 | ||
220e750f RH |
3099 | case rs_dwarf2dbg: |
3100 | growth = dwarf2dbg_relax_frag (fragP); | |
3101 | break; | |
3102 | ||
252b5132 RH |
3103 | default: |
3104 | BAD_CASE (fragP->fr_type); | |
3105 | break; | |
3106 | } | |
3107 | if (growth) | |
3108 | { | |
3109 | stretch += growth; | |
e46d99eb | 3110 | stretched = 1; |
d1c5f158 AM |
3111 | if (fragP->fr_type == rs_leb128) |
3112 | rs_leb128_fudge += 16; | |
3113 | else if (fragP->fr_type == rs_align | |
3114 | && (rs_leb128_fudge & 16) != 0 | |
3115 | && stretch == 0) | |
3116 | rs_leb128_fudge += 16; | |
3117 | else | |
3118 | rs_leb128_fudge = 0; | |
252b5132 | 3119 | } |
4111faa5 | 3120 | } |
d1c5f158 AM |
3121 | |
3122 | if (stretch == 0 | |
3123 | && (rs_leb128_fudge & 16) == 0 | |
3124 | && (rs_leb128_fudge & -16) != 0) | |
3125 | rs_leb128_fudge += 1; | |
3126 | else | |
3127 | rs_leb128_fudge = 0; | |
252b5132 | 3128 | } |
4111faa5 NC |
3129 | /* Until nothing further to relax. */ |
3130 | while (stretched && -- max_iterations); | |
3131 | ||
3132 | if (stretched) | |
3133 | as_fatal (_("Infinite loop encountered whilst attempting to compute the addresses of symbols in section %s"), | |
3134 | segment_name (segment)); | |
3135 | } | |
252b5132 | 3136 | |
e46d99eb AM |
3137 | for (fragP = segment_frag_root; fragP; fragP = fragP->fr_next) |
3138 | if (fragP->last_fr_address != fragP->fr_address) | |
3139 | { | |
3140 | fragP->last_fr_address = fragP->fr_address; | |
3141 | ret = 1; | |
3142 | } | |
3143 | return ret; | |
efaf0ba4 | 3144 | } |
252b5132 | 3145 | |
252b5132 | 3146 | void |
d7342424 | 3147 | number_to_chars_bigendian (char *buf, valueT val, int n) |
252b5132 | 3148 | { |
937149dd | 3149 | if (n <= 0) |
252b5132 RH |
3150 | abort (); |
3151 | while (n--) | |
3152 | { | |
3153 | buf[n] = val & 0xff; | |
3154 | val >>= 8; | |
3155 | } | |
3156 | } | |
3157 | ||
3158 | void | |
d7342424 | 3159 | number_to_chars_littleendian (char *buf, valueT val, int n) |
252b5132 | 3160 | { |
937149dd | 3161 | if (n <= 0) |
252b5132 RH |
3162 | abort (); |
3163 | while (n--) | |
3164 | { | |
3165 | *buf++ = val & 0xff; | |
3166 | val >>= 8; | |
3167 | } | |
3168 | } | |
3169 | ||
3170 | void | |
d7342424 | 3171 | write_print_statistics (FILE *file) |
252b5132 | 3172 | { |
6d4d30bb | 3173 | fprintf (file, "fixups: %d\n", n_fixups); |
252b5132 RH |
3174 | } |
3175 | ||
efaf0ba4 | 3176 | /* For debugging. */ |
252b5132 RH |
3177 | extern int indent_level; |
3178 | ||
3179 | void | |
d7342424 | 3180 | print_fixup (fixS *fixp) |
252b5132 RH |
3181 | { |
3182 | indent_level = 1; | |
d2df793a NC |
3183 | fprintf (stderr, "fix "); |
3184 | fprintf_vma (stderr, (bfd_vma)((bfd_hostptr_t) fixp)); | |
3185 | fprintf (stderr, " %s:%d",fixp->fx_file, fixp->fx_line); | |
252b5132 RH |
3186 | if (fixp->fx_pcrel) |
3187 | fprintf (stderr, " pcrel"); | |
3188 | if (fixp->fx_pcrel_adjust) | |
3189 | fprintf (stderr, " pcrel_adjust=%d", fixp->fx_pcrel_adjust); | |
252b5132 RH |
3190 | if (fixp->fx_tcbit) |
3191 | fprintf (stderr, " tcbit"); | |
3192 | if (fixp->fx_done) | |
3193 | fprintf (stderr, " done"); | |
d2df793a NC |
3194 | fprintf (stderr, "\n size=%d frag=", fixp->fx_size); |
3195 | fprintf_vma (stderr, (bfd_vma) ((bfd_hostptr_t) fixp->fx_frag)); | |
3196 | fprintf (stderr, " where=%ld offset=%lx addnumber=%lx", | |
3197 | (long) fixp->fx_where, | |
0af1713e AM |
3198 | (unsigned long) fixp->fx_offset, |
3199 | (unsigned long) fixp->fx_addnumber); | |
252b5132 RH |
3200 | fprintf (stderr, "\n %s (%d)", bfd_get_reloc_code_name (fixp->fx_r_type), |
3201 | fixp->fx_r_type); | |
252b5132 RH |
3202 | if (fixp->fx_addsy) |
3203 | { | |
3204 | fprintf (stderr, "\n +<"); | |
3205 | print_symbol_value_1 (stderr, fixp->fx_addsy); | |
3206 | fprintf (stderr, ">"); | |
3207 | } | |
3208 | if (fixp->fx_subsy) | |
3209 | { | |
3210 | fprintf (stderr, "\n -<"); | |
3211 | print_symbol_value_1 (stderr, fixp->fx_subsy); | |
3212 | fprintf (stderr, ">"); | |
3213 | } | |
3214 | fprintf (stderr, "\n"); | |
3215 | #ifdef TC_FIX_DATA_PRINT | |
3216 | TC_FIX_DATA_PRINT (stderr, fixp); | |
3217 | #endif | |
3218 | } |