Commit | Line | Data |
---|---|---|
252b5132 | 1 | /* write.c - emit .o file |
2571583a | 2 | Copyright (C) 1986-2017 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 KH |
145 | fix_new_internal (fragS *frag, /* Which frag? */ |
146 | int where, /* Where in that frag? */ | |
147 | int size, /* 1, 2, or 4 usually. */ | |
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 | { | |
167 | as_bad (_("field fx_size too small to hold %d"), size); | |
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 RH |
177 | fixP->fx_im_disp = 0; |
178 | fixP->fx_pcrel_adjust = 0; | |
179 | fixP->fx_bit_fixP = 0; | |
180 | fixP->fx_addnumber = 0; | |
181 | fixP->fx_tcbit = 0; | |
20ee54e8 | 182 | fixP->fx_tcbit2 = 0; |
252b5132 RH |
183 | fixP->fx_done = 0; |
184 | fixP->fx_no_overflow = 0; | |
185 | fixP->fx_signed = 0; | |
186 | ||
187 | #ifdef USING_CGEN | |
188 | fixP->fx_cgen.insn = NULL; | |
189 | fixP->fx_cgen.opinfo = 0; | |
190 | #endif | |
191 | ||
192 | #ifdef TC_FIX_TYPE | |
efaf0ba4 | 193 | TC_INIT_FIX_DATA (fixP); |
252b5132 RH |
194 | #endif |
195 | ||
3b4dbbbf | 196 | fixP->fx_file = as_where (&fixP->fx_line); |
252b5132 | 197 | |
252b5132 RH |
198 | { |
199 | ||
252b5132 RH |
200 | fixS **seg_fix_rootP = (frags_chained |
201 | ? &seg_info (now_seg)->fix_root | |
202 | : &frchain_now->fix_root); | |
203 | fixS **seg_fix_tailP = (frags_chained | |
204 | ? &seg_info (now_seg)->fix_tail | |
205 | : &frchain_now->fix_tail); | |
252b5132 | 206 | |
c865e45b RS |
207 | if (at_beginning) |
208 | { | |
209 | fixP->fx_next = *seg_fix_rootP; | |
210 | *seg_fix_rootP = fixP; | |
211 | if (fixP->fx_next == NULL) | |
212 | *seg_fix_tailP = fixP; | |
213 | } | |
252b5132 | 214 | else |
c865e45b RS |
215 | { |
216 | fixP->fx_next = NULL; | |
217 | if (*seg_fix_tailP) | |
218 | (*seg_fix_tailP)->fx_next = fixP; | |
219 | else | |
220 | *seg_fix_rootP = fixP; | |
221 | *seg_fix_tailP = fixP; | |
222 | } | |
252b5132 RH |
223 | } |
224 | ||
225 | return fixP; | |
226 | } | |
227 | ||
228 | /* Create a fixup relative to a symbol (plus a constant). */ | |
229 | ||
230 | fixS * | |
d7342424 KH |
231 | fix_new (fragS *frag, /* Which frag? */ |
232 | int where, /* Where in that frag? */ | |
233 | int size, /* 1, 2, or 4 usually. */ | |
234 | symbolS *add_symbol, /* X_add_symbol. */ | |
235 | offsetT offset, /* X_add_number. */ | |
236 | int pcrel, /* TRUE if PC-relative relocation. */ | |
237 | RELOC_ENUM r_type /* Relocation type. */) | |
252b5132 RH |
238 | { |
239 | return fix_new_internal (frag, where, size, add_symbol, | |
c865e45b | 240 | (symbolS *) NULL, offset, pcrel, r_type, FALSE); |
252b5132 RH |
241 | } |
242 | ||
243 | /* Create a fixup for an expression. Currently we only support fixups | |
244 | for difference expressions. That is itself more than most object | |
245 | file formats support anyhow. */ | |
246 | ||
247 | fixS * | |
d7342424 KH |
248 | fix_new_exp (fragS *frag, /* Which frag? */ |
249 | int where, /* Where in that frag? */ | |
250 | int size, /* 1, 2, or 4 usually. */ | |
251 | expressionS *exp, /* Expression. */ | |
252 | int pcrel, /* TRUE if PC-relative relocation. */ | |
253 | RELOC_ENUM r_type /* Relocation type. */) | |
252b5132 RH |
254 | { |
255 | symbolS *add = NULL; | |
256 | symbolS *sub = NULL; | |
257 | offsetT off = 0; | |
258 | ||
259 | switch (exp->X_op) | |
260 | { | |
261 | case O_absent: | |
262 | break; | |
263 | ||
37006e43 NC |
264 | case O_register: |
265 | as_bad (_("register value used as expression")); | |
266 | break; | |
267 | ||
252b5132 RH |
268 | case O_add: |
269 | /* This comes up when _GLOBAL_OFFSET_TABLE_+(.-L0) is read, if | |
270 | the difference expression cannot immediately be reduced. */ | |
271 | { | |
272 | symbolS *stmp = make_expr_symbol (exp); | |
58a77e41 | 273 | |
252b5132 RH |
274 | exp->X_op = O_symbol; |
275 | exp->X_op_symbol = 0; | |
276 | exp->X_add_symbol = stmp; | |
277 | exp->X_add_number = 0; | |
58a77e41 | 278 | |
252b5132 RH |
279 | return fix_new_exp (frag, where, size, exp, pcrel, r_type); |
280 | } | |
281 | ||
282 | case O_symbol_rva: | |
283 | add = exp->X_add_symbol; | |
284 | off = exp->X_add_number; | |
252b5132 | 285 | r_type = BFD_RELOC_RVA; |
252b5132 RH |
286 | break; |
287 | ||
288 | case O_uminus: | |
289 | sub = exp->X_add_symbol; | |
290 | off = exp->X_add_number; | |
291 | break; | |
292 | ||
293 | case O_subtract: | |
294 | sub = exp->X_op_symbol; | |
295 | /* Fall through. */ | |
296 | case O_symbol: | |
297 | add = exp->X_add_symbol; | |
efaf0ba4 | 298 | /* Fall through. */ |
252b5132 RH |
299 | case O_constant: |
300 | off = exp->X_add_number; | |
301 | break; | |
302 | ||
303 | default: | |
304 | add = make_expr_symbol (exp); | |
305 | break; | |
306 | } | |
307 | ||
c865e45b RS |
308 | return fix_new_internal (frag, where, size, add, sub, off, pcrel, |
309 | r_type, FALSE); | |
310 | } | |
311 | ||
312 | /* Create a fixup at the beginning of FRAG. The arguments are the same | |
313 | as for fix_new, except that WHERE is implicitly 0. */ | |
314 | ||
315 | fixS * | |
316 | fix_at_start (fragS *frag, int size, symbolS *add_symbol, | |
317 | offsetT offset, int pcrel, RELOC_ENUM r_type) | |
318 | { | |
319 | return fix_new_internal (frag, 0, size, add_symbol, | |
320 | (symbolS *) NULL, offset, pcrel, r_type, TRUE); | |
252b5132 RH |
321 | } |
322 | ||
ae6063d4 AM |
323 | /* Generic function to determine whether a fixup requires a relocation. */ |
324 | int | |
d7342424 | 325 | generic_force_reloc (fixS *fix) |
ae6063d4 | 326 | { |
ae6063d4 AM |
327 | if (fix->fx_r_type == BFD_RELOC_VTABLE_INHERIT |
328 | || fix->fx_r_type == BFD_RELOC_VTABLE_ENTRY) | |
329 | return 1; | |
7be1c489 | 330 | |
61e192bf NC |
331 | if (fix->fx_addsy == NULL) |
332 | return 0; | |
333 | ||
ae6063d4 AM |
334 | return S_FORCE_RELOC (fix->fx_addsy, fix->fx_subsy == NULL); |
335 | } | |
336 | ||
252b5132 RH |
337 | /* Append a string onto another string, bumping the pointer along. */ |
338 | void | |
d7342424 | 339 | append (char **charPP, char *fromP, unsigned long length) |
252b5132 | 340 | { |
efaf0ba4 | 341 | /* Don't trust memcpy() of 0 chars. */ |
252b5132 RH |
342 | if (length == 0) |
343 | return; | |
344 | ||
345 | memcpy (*charPP, fromP, length); | |
346 | *charPP += length; | |
347 | } | |
348 | ||
efaf0ba4 NC |
349 | /* This routine records the largest alignment seen for each segment. |
350 | If the beginning of the segment is aligned on the worst-case | |
351 | boundary, all of the other alignments within it will work. At | |
352 | least one object format really uses this info. */ | |
353 | ||
252b5132 | 354 | void |
d7342424 KH |
355 | record_alignment (/* Segment to which alignment pertains. */ |
356 | segT seg, | |
357 | /* Alignment, as a power of 2 (e.g., 1 => 2-byte | |
358 | boundary, 2 => 4-byte boundary, etc.) */ | |
9136aa49 | 359 | unsigned int align) |
252b5132 RH |
360 | { |
361 | if (seg == absolute_section) | |
362 | return; | |
7be1c489 | 363 | |
9136aa49 | 364 | if (align > bfd_get_section_alignment (stdoutput, seg)) |
252b5132 | 365 | bfd_set_section_alignment (stdoutput, seg, align); |
252b5132 RH |
366 | } |
367 | ||
0a9ef439 | 368 | int |
d7342424 | 369 | get_recorded_alignment (segT seg) |
0a9ef439 RH |
370 | { |
371 | if (seg == absolute_section) | |
372 | return 0; | |
7be1c489 | 373 | |
0a9ef439 | 374 | return bfd_get_section_alignment (stdoutput, seg); |
0a9ef439 RH |
375 | } |
376 | ||
252b5132 RH |
377 | /* Reset the section indices after removing the gas created sections. */ |
378 | ||
379 | static void | |
e7ff5c73 | 380 | renumber_sections (bfd *abfd ATTRIBUTE_UNUSED, asection *sec, void *countparg) |
252b5132 RH |
381 | { |
382 | int *countp = (int *) countparg; | |
383 | ||
384 | sec->index = *countp; | |
385 | ++*countp; | |
386 | } | |
387 | ||
252b5132 | 388 | static fragS * |
d7342424 | 389 | chain_frchains_together_1 (segT section, struct frchain *frchp) |
252b5132 RH |
390 | { |
391 | fragS dummy, *prev_frag = &dummy; | |
252b5132 | 392 | fixS fix_dummy, *prev_fix = &fix_dummy; |
252b5132 | 393 | |
c9049d30 | 394 | for (; frchp; frchp = frchp->frch_next) |
252b5132 RH |
395 | { |
396 | prev_frag->fr_next = frchp->frch_root; | |
397 | prev_frag = frchp->frch_last; | |
9c2799c2 | 398 | gas_assert (prev_frag->fr_type != 0); |
252b5132 RH |
399 | if (frchp->fix_root != (fixS *) NULL) |
400 | { | |
401 | if (seg_info (section)->fix_root == (fixS *) NULL) | |
402 | seg_info (section)->fix_root = frchp->fix_root; | |
403 | prev_fix->fx_next = frchp->fix_root; | |
404 | seg_info (section)->fix_tail = frchp->fix_tail; | |
405 | prev_fix = frchp->fix_tail; | |
406 | } | |
252b5132 | 407 | } |
4fc0b46e AM |
408 | gas_assert (prev_frag != &dummy |
409 | && prev_frag->fr_type != 0); | |
252b5132 RH |
410 | prev_frag->fr_next = 0; |
411 | return prev_frag; | |
412 | } | |
413 | ||
252b5132 | 414 | static void |
d7342424 KH |
415 | chain_frchains_together (bfd *abfd ATTRIBUTE_UNUSED, |
416 | segT section, | |
e7ff5c73 | 417 | void *xxx ATTRIBUTE_UNUSED) |
252b5132 RH |
418 | { |
419 | segment_info_type *info; | |
420 | ||
421 | /* BFD may have introduced its own sections without using | |
422 | subseg_new, so it is possible that seg_info is NULL. */ | |
423 | info = seg_info (section); | |
424 | if (info != (segment_info_type *) NULL) | |
efaf0ba4 NC |
425 | info->frchainP->frch_last |
426 | = chain_frchains_together_1 (section, info->frchainP); | |
252b5132 RH |
427 | |
428 | /* Now that we've chained the frags together, we must add new fixups | |
429 | to the segment, not to the frag chain. */ | |
430 | frags_chained = 1; | |
431 | } | |
432 | ||
252b5132 | 433 | static void |
d7342424 | 434 | cvt_frag_to_fill (segT sec ATTRIBUTE_UNUSED, fragS *fragP) |
252b5132 RH |
435 | { |
436 | switch (fragP->fr_type) | |
437 | { | |
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 | |
446 | know (fragP->fr_next != NULL); | |
447 | fragP->fr_offset = (fragP->fr_next->fr_address | |
448 | - fragP->fr_address | |
449 | - fragP->fr_fix) / fragP->fr_var; | |
450 | if (fragP->fr_offset < 0) | |
451 | { | |
14ad458a ILT |
452 | as_bad_where (fragP->fr_file, fragP->fr_line, |
453 | _("attempt to .org/.space backwards? (%ld)"), | |
454 | (long) fragP->fr_offset); | |
3f3cdb03 | 455 | fragP->fr_offset = 0; |
252b5132 RH |
456 | } |
457 | fragP->fr_type = rs_fill; | |
458 | break; | |
459 | ||
460 | case rs_fill: | |
461 | break; | |
462 | ||
463 | case rs_leb128: | |
464 | { | |
465 | valueT value = S_GET_VALUE (fragP->fr_symbol); | |
466 | int size; | |
467 | ||
ba8826a8 AO |
468 | if (!S_IS_DEFINED (fragP->fr_symbol)) |
469 | { | |
470 | as_bad_where (fragP->fr_file, fragP->fr_line, | |
471 | _("leb128 operand is an undefined symbol: %s"), | |
472 | S_GET_NAME (fragP->fr_symbol)); | |
473 | } | |
474 | ||
252b5132 RH |
475 | size = output_leb128 (fragP->fr_literal + fragP->fr_fix, value, |
476 | fragP->fr_subtype); | |
477 | ||
478 | fragP->fr_fix += size; | |
479 | fragP->fr_type = rs_fill; | |
480 | fragP->fr_var = 0; | |
481 | fragP->fr_offset = 0; | |
482 | fragP->fr_symbol = NULL; | |
483 | } | |
484 | break; | |
485 | ||
486 | case rs_cfa: | |
487 | eh_frame_convert_frag (fragP); | |
488 | break; | |
489 | ||
220e750f RH |
490 | case rs_dwarf2dbg: |
491 | dwarf2dbg_convert_frag (fragP); | |
492 | break; | |
493 | ||
252b5132 | 494 | case rs_machine_dependent: |
252b5132 | 495 | md_convert_frag (stdoutput, sec, fragP); |
252b5132 | 496 | |
9c2799c2 | 497 | gas_assert (fragP->fr_next == NULL |
252b5132 RH |
498 | || ((offsetT) (fragP->fr_next->fr_address - fragP->fr_address) |
499 | == fragP->fr_fix)); | |
500 | ||
efaf0ba4 NC |
501 | /* After md_convert_frag, we make the frag into a ".space 0". |
502 | md_convert_frag() should set up any fixSs and constants | |
503 | required. */ | |
252b5132 RH |
504 | frag_wane (fragP); |
505 | break; | |
506 | ||
507 | #ifndef WORKING_DOT_WORD | |
508 | case rs_broken_word: | |
509 | { | |
510 | struct broken_word *lie; | |
511 | ||
512 | if (fragP->fr_subtype) | |
513 | { | |
514 | fragP->fr_fix += md_short_jump_size; | |
515 | for (lie = (struct broken_word *) (fragP->fr_symbol); | |
516 | lie && lie->dispfrag == fragP; | |
517 | lie = lie->next_broken_word) | |
518 | if (lie->added == 1) | |
519 | fragP->fr_fix += md_long_jump_size; | |
520 | } | |
521 | frag_wane (fragP); | |
522 | } | |
523 | break; | |
524 | #endif | |
525 | ||
526 | default: | |
527 | BAD_CASE (fragP->fr_type); | |
528 | break; | |
529 | } | |
09b935ac AM |
530 | #ifdef md_frag_check |
531 | md_frag_check (fragP); | |
532 | #endif | |
252b5132 RH |
533 | } |
534 | ||
32638454 AM |
535 | struct relax_seg_info |
536 | { | |
537 | int pass; | |
538 | int changed; | |
539 | }; | |
d7342424 | 540 | |
252b5132 | 541 | static void |
32638454 | 542 | relax_seg (bfd *abfd ATTRIBUTE_UNUSED, asection *sec, void *xxx) |
e46d99eb AM |
543 | { |
544 | segment_info_type *seginfo = seg_info (sec); | |
32638454 | 545 | struct relax_seg_info *info = (struct relax_seg_info *) xxx; |
e46d99eb AM |
546 | |
547 | if (seginfo && seginfo->frchainP | |
32638454 AM |
548 | && relax_segment (seginfo->frchainP->frch_root, sec, info->pass)) |
549 | info->changed = 1; | |
e46d99eb AM |
550 | } |
551 | ||
e46d99eb | 552 | static void |
e7ff5c73 | 553 | size_seg (bfd *abfd, asection *sec, void *xxx ATTRIBUTE_UNUSED) |
252b5132 RH |
554 | { |
555 | flagword flags; | |
556 | fragS *fragp; | |
557 | segment_info_type *seginfo; | |
558 | int x; | |
559 | valueT size, newsize; | |
560 | ||
561 | subseg_change (sec, 0); | |
562 | ||
252b5132 RH |
563 | seginfo = seg_info (sec); |
564 | if (seginfo && seginfo->frchainP) | |
565 | { | |
252b5132 RH |
566 | for (fragp = seginfo->frchainP->frch_root; fragp; fragp = fragp->fr_next) |
567 | cvt_frag_to_fill (sec, fragp); | |
568 | for (fragp = seginfo->frchainP->frch_root; | |
569 | fragp->fr_next; | |
570 | fragp = fragp->fr_next) | |
efaf0ba4 NC |
571 | /* Walk to last elt. */ |
572 | ; | |
252b5132 RH |
573 | size = fragp->fr_address + fragp->fr_fix; |
574 | } | |
575 | else | |
576 | size = 0; | |
577 | ||
e46d99eb | 578 | flags = bfd_get_section_flags (abfd, sec); |
f3d2b04b KT |
579 | if (size == 0 && bfd_get_section_size (sec) != 0 && |
580 | (flags & SEC_HAS_CONTENTS) != 0) | |
581 | return; | |
e46d99eb | 582 | |
252b5132 RH |
583 | if (size > 0 && ! seginfo->bss) |
584 | flags |= SEC_HAS_CONTENTS; | |
585 | ||
e5435dec | 586 | flags &= ~SEC_RELOC; |
252b5132 | 587 | x = bfd_set_section_flags (abfd, sec, flags); |
9c2799c2 | 588 | gas_assert (x); |
252b5132 | 589 | |
2edb36e7 NC |
590 | /* If permitted, allow the backend to pad out the section |
591 | to some alignment boundary. */ | |
592 | if (do_not_pad_sections_to_alignment) | |
593 | newsize = size; | |
594 | else | |
595 | newsize = md_section_align (sec, size); | |
252b5132 | 596 | x = bfd_set_section_size (abfd, sec, newsize); |
9c2799c2 | 597 | gas_assert (x); |
252b5132 RH |
598 | |
599 | /* If the size had to be rounded up, add some padding in the last | |
600 | non-empty frag. */ | |
9c2799c2 | 601 | gas_assert (newsize >= size); |
252b5132 RH |
602 | if (size != newsize) |
603 | { | |
604 | fragS *last = seginfo->frchainP->frch_last; | |
605 | fragp = seginfo->frchainP->frch_root; | |
606 | while (fragp->fr_next != last) | |
607 | fragp = fragp->fr_next; | |
608 | last->fr_address = size; | |
18e1d487 AM |
609 | if ((newsize - size) % fragp->fr_var == 0) |
610 | fragp->fr_offset += (newsize - size) / fragp->fr_var; | |
611 | else | |
612 | /* If we hit this abort, it's likely due to subsegs_finish not | |
613 | providing sufficient alignment on the last frag, and the | |
614 | machine dependent code using alignment frags with fr_var | |
615 | greater than 1. */ | |
616 | abort (); | |
252b5132 RH |
617 | } |
618 | ||
619 | #ifdef tc_frob_section | |
620 | tc_frob_section (sec); | |
621 | #endif | |
622 | #ifdef obj_frob_section | |
623 | obj_frob_section (sec); | |
624 | #endif | |
625 | } | |
626 | ||
627 | #ifdef DEBUG2 | |
628 | static void | |
988392e2 | 629 | dump_section_relocs (bfd *abfd ATTRIBUTE_UNUSED, asection *sec, FILE *stream) |
252b5132 | 630 | { |
252b5132 RH |
631 | segment_info_type *seginfo = seg_info (sec); |
632 | fixS *fixp = seginfo->fix_root; | |
633 | ||
634 | if (!fixp) | |
635 | return; | |
636 | ||
637 | fprintf (stream, "sec %s relocs:\n", sec->name); | |
638 | while (fixp) | |
639 | { | |
640 | symbolS *s = fixp->fx_addsy; | |
e723ef7c ILT |
641 | |
642 | fprintf (stream, " %08lx: type %d ", (unsigned long) fixp, | |
643 | (int) fixp->fx_r_type); | |
644 | if (s == NULL) | |
645 | fprintf (stream, "no sym\n"); | |
646 | else | |
252b5132 | 647 | { |
e723ef7c ILT |
648 | print_symbol_value_1 (stream, s); |
649 | fprintf (stream, "\n"); | |
252b5132 | 650 | } |
252b5132 RH |
651 | fixp = fixp->fx_next; |
652 | } | |
653 | } | |
654 | #else | |
655 | #define dump_section_relocs(ABFD,SEC,STREAM) ((void) 0) | |
656 | #endif | |
657 | ||
658 | #ifndef EMIT_SECTION_SYMBOLS | |
659 | #define EMIT_SECTION_SYMBOLS 1 | |
660 | #endif | |
661 | ||
05e9452c AM |
662 | /* Resolve U.A.OFFSET_SYM and U.A.SYM fields of RELOC_LIST entries, |
663 | and check for validity. Convert RELOC_LIST from using U.A fields | |
664 | to U.B fields. */ | |
665 | static void | |
666 | resolve_reloc_expr_symbols (void) | |
667 | { | |
080f9e4f | 668 | bfd_vma addr_mask = 1; |
05e9452c AM |
669 | struct reloc_list *r; |
670 | ||
080f9e4f MR |
671 | /* Avoid a shift by the width of type. */ |
672 | addr_mask <<= bfd_arch_bits_per_address (stdoutput) - 1; | |
673 | addr_mask <<= 1; | |
674 | addr_mask -= 1; | |
675 | ||
05e9452c AM |
676 | for (r = reloc_list; r; r = r->next) |
677 | { | |
080f9e4f | 678 | reloc_howto_type *howto = r->u.a.howto; |
05e9452c AM |
679 | expressionS *symval; |
680 | symbolS *sym; | |
681 | bfd_vma offset, addend; | |
682 | asection *sec; | |
05e9452c AM |
683 | |
684 | resolve_symbol_value (r->u.a.offset_sym); | |
685 | symval = symbol_get_value_expression (r->u.a.offset_sym); | |
686 | ||
687 | offset = 0; | |
688 | sym = NULL; | |
689 | if (symval->X_op == O_constant) | |
690 | sym = r->u.a.offset_sym; | |
691 | else if (symval->X_op == O_symbol) | |
692 | { | |
693 | sym = symval->X_add_symbol; | |
694 | offset = symval->X_add_number; | |
695 | symval = symbol_get_value_expression (symval->X_add_symbol); | |
696 | } | |
697 | if (sym == NULL | |
698 | || symval->X_op != O_constant | |
699 | || (sec = S_GET_SEGMENT (sym)) == NULL | |
700 | || !SEG_NORMAL (sec)) | |
701 | { | |
702 | as_bad_where (r->file, r->line, _("invalid offset expression")); | |
703 | sec = NULL; | |
704 | } | |
705 | else | |
706 | offset += S_GET_VALUE (sym); | |
707 | ||
708 | sym = NULL; | |
709 | addend = r->u.a.addend; | |
710 | if (r->u.a.sym != NULL) | |
711 | { | |
712 | resolve_symbol_value (r->u.a.sym); | |
713 | symval = symbol_get_value_expression (r->u.a.sym); | |
714 | if (symval->X_op == O_constant) | |
715 | sym = r->u.a.sym; | |
716 | else if (symval->X_op == O_symbol) | |
717 | { | |
718 | sym = symval->X_add_symbol; | |
719 | addend += symval->X_add_number; | |
720 | symval = symbol_get_value_expression (symval->X_add_symbol); | |
721 | } | |
722 | if (symval->X_op != O_constant) | |
723 | { | |
724 | as_bad_where (r->file, r->line, _("invalid reloc expression")); | |
725 | sec = NULL; | |
726 | } | |
727 | else if (sym != NULL) | |
7230378d | 728 | { |
080f9e4f MR |
729 | /* Convert relocs against local symbols to refer to the |
730 | corresponding section symbol plus offset instead. Keep | |
731 | PC-relative relocs of the REL variety intact though to | |
732 | prevent the offset from overflowing the relocated field, | |
733 | unless it has enough bits to cover the whole address | |
734 | space. */ | |
735 | if (S_IS_LOCAL (sym) && !symbol_section_p (sym) | |
d6101ac2 MR |
736 | && (sec->use_rela_p |
737 | || (howto->partial_inplace | |
738 | && (!howto->pc_relative | |
739 | || howto->src_mask == addr_mask)))) | |
7230378d AM |
740 | { |
741 | asection *symsec = S_GET_SEGMENT (sym); | |
742 | if (!(((symsec->flags & SEC_MERGE) != 0 | |
743 | && addend != 0) | |
744 | || (symsec->flags & SEC_THREAD_LOCAL) != 0)) | |
745 | { | |
746 | addend += S_GET_VALUE (sym); | |
747 | sym = section_symbol (symsec); | |
748 | } | |
749 | } | |
750 | symbol_mark_used_in_reloc (sym); | |
751 | } | |
05e9452c AM |
752 | } |
753 | if (sym == NULL) | |
754 | { | |
755 | if (abs_section_sym == NULL) | |
756 | abs_section_sym = section_symbol (absolute_section); | |
757 | sym = abs_section_sym; | |
758 | } | |
759 | ||
05e9452c AM |
760 | r->u.b.sec = sec; |
761 | r->u.b.s = symbol_get_bfdsym (sym); | |
762 | r->u.b.r.sym_ptr_ptr = &r->u.b.s; | |
763 | r->u.b.r.address = offset; | |
764 | r->u.b.r.addend = addend; | |
765 | r->u.b.r.howto = howto; | |
766 | } | |
767 | } | |
768 | ||
df44284e AM |
769 | /* This pass over fixups decides whether symbols can be replaced with |
770 | section symbols. */ | |
771 | ||
252b5132 | 772 | static void |
d7342424 KH |
773 | adjust_reloc_syms (bfd *abfd ATTRIBUTE_UNUSED, |
774 | asection *sec, | |
e7ff5c73 | 775 | void *xxx ATTRIBUTE_UNUSED) |
252b5132 RH |
776 | { |
777 | segment_info_type *seginfo = seg_info (sec); | |
778 | fixS *fixp; | |
779 | ||
780 | if (seginfo == NULL) | |
781 | return; | |
782 | ||
783 | dump_section_relocs (abfd, sec, stderr); | |
784 | ||
785 | for (fixp = seginfo->fix_root; fixp; fixp = fixp->fx_next) | |
786 | if (fixp->fx_done) | |
efaf0ba4 NC |
787 | /* Ignore it. */ |
788 | ; | |
252b5132 RH |
789 | else if (fixp->fx_addsy) |
790 | { | |
791 | symbolS *sym; | |
792 | asection *symsec; | |
793 | ||
794 | #ifdef DEBUG5 | |
795 | fprintf (stderr, "\n\nadjusting fixup:\n"); | |
796 | print_fixup (fixp); | |
797 | #endif | |
798 | ||
799 | sym = fixp->fx_addsy; | |
800 | ||
801 | /* All symbols should have already been resolved at this | |
802 | point. It is possible to see unresolved expression | |
803 | symbols, though, since they are not in the regular symbol | |
804 | table. */ | |
df44284e | 805 | resolve_symbol_value (sym); |
efaf0ba4 | 806 | |
49309057 | 807 | if (fixp->fx_subsy != NULL) |
6386f3a7 | 808 | resolve_symbol_value (fixp->fx_subsy); |
252b5132 | 809 | |
60938e80 L |
810 | /* If this symbol is equated to an undefined or common symbol, |
811 | convert the fixup to being against that symbol. */ | |
b4b24b79 AM |
812 | while (symbol_equated_reloc_p (sym) |
813 | || S_IS_WEAKREFR (sym)) | |
252b5132 | 814 | { |
b4b24b79 AM |
815 | symbolS *newsym = symbol_get_value_expression (sym)->X_add_symbol; |
816 | if (sym == newsym) | |
817 | break; | |
49309057 | 818 | fixp->fx_offset += symbol_get_value_expression (sym)->X_add_number; |
b4b24b79 AM |
819 | fixp->fx_addsy = newsym; |
820 | sym = newsym; | |
252b5132 RH |
821 | } |
822 | ||
df44284e | 823 | if (symbol_mri_common_p (sym)) |
252b5132 | 824 | { |
b4b24b79 AM |
825 | fixp->fx_offset += S_GET_VALUE (sym); |
826 | fixp->fx_addsy = symbol_get_value_expression (sym)->X_add_symbol; | |
df44284e | 827 | continue; |
252b5132 RH |
828 | } |
829 | ||
a161fe53 AM |
830 | /* If the symbol is undefined, common, weak, or global (ELF |
831 | shared libs), we can't replace it with the section symbol. */ | |
ae6063d4 | 832 | if (S_FORCE_RELOC (fixp->fx_addsy, 1)) |
a161fe53 AM |
833 | continue; |
834 | ||
835 | /* Is there some other (target cpu dependent) reason we can't adjust | |
836 | this one? (E.g. relocations involving function addresses on | |
837 | the PA. */ | |
838 | #ifdef tc_fix_adjustable | |
839 | if (! tc_fix_adjustable (fixp)) | |
840 | continue; | |
841 | #endif | |
842 | ||
843 | /* Since we're reducing to section symbols, don't attempt to reduce | |
844 | anything that's already using one. */ | |
845 | if (symbol_section_p (sym)) | |
846 | continue; | |
847 | ||
252b5132 | 848 | symsec = S_GET_SEGMENT (sym); |
252b5132 RH |
849 | if (symsec == NULL) |
850 | abort (); | |
efaf0ba4 | 851 | |
a841bdf5 AM |
852 | if (bfd_is_abs_section (symsec) |
853 | || symsec == reg_section) | |
252b5132 | 854 | { |
a161fe53 | 855 | /* The fixup_segment routine normally will not use this |
b4b24b79 | 856 | symbol in a relocation. */ |
df44284e | 857 | continue; |
252b5132 RH |
858 | } |
859 | ||
7565ed77 | 860 | /* Don't try to reduce relocs which refer to non-local symbols |
b4b24b79 AM |
861 | in .linkonce sections. It can lead to confusion when a |
862 | debugging section refers to a .linkonce section. I hope | |
863 | this will always be correct. */ | |
7565ed77 | 864 | if (symsec != sec && ! S_IS_LOCAL (sym)) |
252b5132 | 865 | { |
a161fe53 AM |
866 | if ((symsec->flags & SEC_LINK_ONCE) != 0 |
867 | || (IS_ELF | |
868 | /* The GNU toolchain uses an extension for ELF: a | |
869 | section beginning with the magic string | |
870 | .gnu.linkonce is a linkonce section. */ | |
871 | && strncmp (segment_name (symsec), ".gnu.linkonce", | |
872 | sizeof ".gnu.linkonce" - 1) == 0)) | |
873 | continue; | |
252b5132 | 874 | } |
f7460f5f JJ |
875 | |
876 | /* Never adjust a reloc against local symbol in a merge section | |
877 | with non-zero addend. */ | |
5045ec7a AM |
878 | if ((symsec->flags & SEC_MERGE) != 0 |
879 | && (fixp->fx_offset != 0 || fixp->fx_subsy != NULL)) | |
a161fe53 | 880 | continue; |
13ae64f3 JJ |
881 | |
882 | /* Never adjust a reloc against TLS local symbol. */ | |
df44284e | 883 | if ((symsec->flags & SEC_THREAD_LOCAL) != 0) |
a161fe53 | 884 | continue; |
252b5132 | 885 | |
a161fe53 | 886 | /* We refetch the segment when calling section_symbol, rather |
252b5132 | 887 | than using symsec, because S_GET_VALUE may wind up changing |
efaf0ba4 | 888 | the section when it calls resolve_symbol_value. */ |
252b5132 RH |
889 | fixp->fx_offset += S_GET_VALUE (sym); |
890 | fixp->fx_addsy = section_symbol (S_GET_SEGMENT (sym)); | |
e723ef7c ILT |
891 | #ifdef DEBUG5 |
892 | fprintf (stderr, "\nadjusted fixup:\n"); | |
893 | print_fixup (fixp); | |
894 | #endif | |
252b5132 | 895 | } |
252b5132 RH |
896 | |
897 | dump_section_relocs (abfd, sec, stderr); | |
898 | } | |
899 | ||
e7ff5c73 AM |
900 | /* fixup_segment() |
901 | ||
902 | Go through all the fixS's in a segment and see which ones can be | |
903 | handled now. (These consist of fixS where we have since discovered | |
904 | the value of a symbol, or the address of the frag involved.) | |
905 | For each one, call md_apply_fix to put the fix into the frag data. | |
89d67ed9 AM |
906 | Ones that we couldn't completely handle here will be output later |
907 | by emit_relocations. */ | |
e7ff5c73 | 908 | |
89d67ed9 | 909 | static void |
e7ff5c73 AM |
910 | fixup_segment (fixS *fixP, segT this_segment) |
911 | { | |
e7ff5c73 AM |
912 | valueT add_number; |
913 | fragS *fragP; | |
914 | segT add_symbol_segment = absolute_section; | |
915 | ||
916 | if (fixP != NULL && abs_section_sym == NULL) | |
917 | abs_section_sym = section_symbol (absolute_section); | |
918 | ||
919 | /* If the linker is doing the relaxing, we must not do any fixups. | |
920 | ||
921 | Well, strictly speaking that's not true -- we could do any that | |
922 | are PC-relative and don't cross regions that could change size. | |
923 | And for the i960 we might be able to turn callx/callj into bal | |
924 | anyways in cases where we know the maximum displacement. */ | |
925 | if (linkrelax && TC_LINKRELAX_FIXUP (this_segment)) | |
926 | { | |
927 | for (; fixP; fixP = fixP->fx_next) | |
928 | if (!fixP->fx_done) | |
929 | { | |
930 | if (fixP->fx_addsy == NULL) | |
931 | { | |
932 | /* There was no symbol required by this relocation. | |
933 | However, BFD doesn't really handle relocations | |
934 | without symbols well. So fake up a local symbol in | |
935 | the absolute section. */ | |
936 | fixP->fx_addsy = abs_section_sym; | |
937 | } | |
938 | symbol_mark_used_in_reloc (fixP->fx_addsy); | |
939 | if (fixP->fx_subsy != NULL) | |
940 | symbol_mark_used_in_reloc (fixP->fx_subsy); | |
e7ff5c73 | 941 | } |
89d67ed9 | 942 | return; |
e7ff5c73 AM |
943 | } |
944 | ||
945 | for (; fixP; fixP = fixP->fx_next) | |
946 | { | |
947 | #ifdef DEBUG5 | |
948 | fprintf (stderr, "\nprocessing fixup:\n"); | |
949 | print_fixup (fixP); | |
950 | #endif | |
951 | ||
952 | fragP = fixP->fx_frag; | |
953 | know (fragP); | |
954 | #ifdef TC_VALIDATE_FIX | |
955 | TC_VALIDATE_FIX (fixP, this_segment, skip); | |
956 | #endif | |
957 | add_number = fixP->fx_offset; | |
958 | ||
e7ff5c73 AM |
959 | if (fixP->fx_addsy != NULL) |
960 | add_symbol_segment = S_GET_SEGMENT (fixP->fx_addsy); | |
961 | ||
962 | if (fixP->fx_subsy != NULL) | |
963 | { | |
964 | segT sub_symbol_segment; | |
965 | resolve_symbol_value (fixP->fx_subsy); | |
966 | sub_symbol_segment = S_GET_SEGMENT (fixP->fx_subsy); | |
967 | if (fixP->fx_addsy != NULL | |
968 | && sub_symbol_segment == add_symbol_segment | |
c969da64 RS |
969 | && !S_FORCE_RELOC (fixP->fx_addsy, 0) |
970 | && !S_FORCE_RELOC (fixP->fx_subsy, 0) | |
e7ff5c73 AM |
971 | && !TC_FORCE_RELOCATION_SUB_SAME (fixP, add_symbol_segment)) |
972 | { | |
973 | add_number += S_GET_VALUE (fixP->fx_addsy); | |
974 | add_number -= S_GET_VALUE (fixP->fx_subsy); | |
975 | fixP->fx_offset = add_number; | |
976 | fixP->fx_addsy = NULL; | |
977 | fixP->fx_subsy = NULL; | |
978 | #ifdef TC_M68K | |
979 | /* See the comment below about 68k weirdness. */ | |
980 | fixP->fx_pcrel = 0; | |
981 | #endif | |
982 | } | |
983 | else if (sub_symbol_segment == absolute_section | |
c969da64 | 984 | && !S_FORCE_RELOC (fixP->fx_subsy, 0) |
9a97a5d7 | 985 | && !TC_FORCE_RELOCATION_SUB_ABS (fixP, add_symbol_segment)) |
e7ff5c73 AM |
986 | { |
987 | add_number -= S_GET_VALUE (fixP->fx_subsy); | |
988 | fixP->fx_offset = add_number; | |
989 | fixP->fx_subsy = NULL; | |
990 | } | |
991 | else if (sub_symbol_segment == this_segment | |
c969da64 | 992 | && !S_FORCE_RELOC (fixP->fx_subsy, 0) |
5db484ff | 993 | && !TC_FORCE_RELOCATION_SUB_LOCAL (fixP, add_symbol_segment)) |
e7ff5c73 AM |
994 | { |
995 | add_number -= S_GET_VALUE (fixP->fx_subsy); | |
996 | fixP->fx_offset = (add_number + fixP->fx_dot_value | |
8e723a10 | 997 | + fixP->fx_dot_frag->fr_address); |
e7ff5c73 AM |
998 | |
999 | /* Make it pc-relative. If the back-end code has not | |
1000 | selected a pc-relative reloc, cancel the adjustment | |
1001 | we do later on all pc-relative relocs. */ | |
1002 | if (0 | |
1003 | #ifdef TC_M68K | |
1004 | /* Do this for m68k even if it's already described | |
1005 | as pc-relative. On the m68k, an operand of | |
1006 | "pc@(foo-.-2)" should address "foo" in a | |
1007 | pc-relative mode. */ | |
1008 | || 1 | |
1009 | #endif | |
1010 | || !fixP->fx_pcrel) | |
1011 | add_number += MD_PCREL_FROM_SECTION (fixP, this_segment); | |
1012 | fixP->fx_subsy = NULL; | |
1013 | fixP->fx_pcrel = 1; | |
1014 | } | |
586ec8c1 | 1015 | else if (!TC_VALIDATE_FIX_SUB (fixP, add_symbol_segment)) |
e7ff5c73 | 1016 | { |
9a97a5d7 AM |
1017 | if (!md_register_arithmetic |
1018 | && (add_symbol_segment == reg_section | |
1019 | || sub_symbol_segment == reg_section)) | |
1020 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
1021 | _("register value used as expression")); | |
1022 | else | |
1023 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
1024 | _("can't resolve `%s' {%s section} - `%s' {%s section}"), | |
1025 | fixP->fx_addsy ? S_GET_NAME (fixP->fx_addsy) : "0", | |
1026 | segment_name (add_symbol_segment), | |
1027 | S_GET_NAME (fixP->fx_subsy), | |
1028 | segment_name (sub_symbol_segment)); | |
e7ff5c73 | 1029 | } |
586ec8c1 NC |
1030 | else if (sub_symbol_segment != undefined_section |
1031 | && ! bfd_is_com_section (sub_symbol_segment) | |
1032 | && MD_APPLY_SYM_VALUE (fixP)) | |
1033 | add_number -= S_GET_VALUE (fixP->fx_subsy); | |
e7ff5c73 AM |
1034 | } |
1035 | ||
1036 | if (fixP->fx_addsy) | |
1037 | { | |
1fc5d88e | 1038 | if (add_symbol_segment == this_segment |
c969da64 | 1039 | && !S_FORCE_RELOC (fixP->fx_addsy, 0) |
e7ff5c73 AM |
1040 | && !TC_FORCE_RELOCATION_LOCAL (fixP)) |
1041 | { | |
1042 | /* This fixup was made when the symbol's segment was | |
1043 | SEG_UNKNOWN, but it is now in the local segment. | |
1044 | So we know how to do the address without relocation. */ | |
1045 | add_number += S_GET_VALUE (fixP->fx_addsy); | |
1046 | fixP->fx_offset = add_number; | |
1047 | if (fixP->fx_pcrel) | |
1048 | add_number -= MD_PCREL_FROM_SECTION (fixP, this_segment); | |
1049 | fixP->fx_addsy = NULL; | |
1050 | fixP->fx_pcrel = 0; | |
1051 | } | |
1052 | else if (add_symbol_segment == absolute_section | |
c969da64 | 1053 | && !S_FORCE_RELOC (fixP->fx_addsy, 0) |
e7ff5c73 AM |
1054 | && !TC_FORCE_RELOCATION_ABS (fixP)) |
1055 | { | |
1056 | add_number += S_GET_VALUE (fixP->fx_addsy); | |
1057 | fixP->fx_offset = add_number; | |
1058 | fixP->fx_addsy = NULL; | |
1059 | } | |
1060 | else if (add_symbol_segment != undefined_section | |
1061 | && ! bfd_is_com_section (add_symbol_segment) | |
1062 | && MD_APPLY_SYM_VALUE (fixP)) | |
1063 | add_number += S_GET_VALUE (fixP->fx_addsy); | |
1064 | } | |
1065 | ||
1066 | if (fixP->fx_pcrel) | |
1067 | { | |
1068 | add_number -= MD_PCREL_FROM_SECTION (fixP, this_segment); | |
1069 | if (!fixP->fx_done && fixP->fx_addsy == NULL) | |
1070 | { | |
1071 | /* There was no symbol required by this relocation. | |
1072 | However, BFD doesn't really handle relocations | |
1073 | without symbols well. So fake up a local symbol in | |
1074 | the absolute section. */ | |
1075 | fixP->fx_addsy = abs_section_sym; | |
1076 | } | |
1077 | } | |
1078 | ||
1079 | if (!fixP->fx_done) | |
1080 | md_apply_fix (fixP, &add_number, this_segment); | |
1081 | ||
1082 | if (!fixP->fx_done) | |
1083 | { | |
e7ff5c73 AM |
1084 | if (fixP->fx_addsy == NULL) |
1085 | fixP->fx_addsy = abs_section_sym; | |
1086 | symbol_mark_used_in_reloc (fixP->fx_addsy); | |
1087 | if (fixP->fx_subsy != NULL) | |
1088 | symbol_mark_used_in_reloc (fixP->fx_subsy); | |
1089 | } | |
1090 | ||
1091 | if (!fixP->fx_bit_fixP && !fixP->fx_no_overflow && fixP->fx_size != 0) | |
1092 | { | |
1093 | if (fixP->fx_size < sizeof (valueT)) | |
1094 | { | |
1095 | valueT mask; | |
1096 | ||
1097 | mask = 0; | |
1098 | mask--; /* Set all bits to one. */ | |
1099 | mask <<= fixP->fx_size * 8 - (fixP->fx_signed ? 1 : 0); | |
1100 | if ((add_number & mask) != 0 && (add_number & mask) != mask) | |
1101 | { | |
1102 | char buf[50], buf2[50]; | |
1103 | sprint_value (buf, fragP->fr_address + fixP->fx_where); | |
1104 | if (add_number > 1000) | |
1105 | sprint_value (buf2, add_number); | |
1106 | else | |
1107 | sprintf (buf2, "%ld", (long) add_number); | |
1108 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
1109 | _("value of %s too large for field of %d bytes at %s"), | |
1110 | buf2, fixP->fx_size, buf); | |
1111 | } /* Generic error checking. */ | |
1112 | } | |
1113 | #ifdef WARN_SIGNED_OVERFLOW_WORD | |
1114 | /* Warn if a .word value is too large when treated as a signed | |
1115 | number. We already know it is not too negative. This is to | |
1116 | catch over-large switches generated by gcc on the 68k. */ | |
1117 | if (!flag_signed_overflow_ok | |
1118 | && fixP->fx_size == 2 | |
1119 | && add_number > 0x7fff) | |
1120 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
1121 | _("signed .word overflow; switch may be too large; %ld at 0x%lx"), | |
1122 | (long) add_number, | |
1123 | (long) (fragP->fr_address + fixP->fx_where)); | |
1124 | #endif | |
1125 | } /* Not a bit fix. */ | |
1126 | ||
1127 | #ifdef TC_VALIDATE_FIX | |
1128 | skip: ATTRIBUTE_UNUSED_LABEL | |
1129 | ; | |
1130 | #endif | |
1131 | #ifdef DEBUG5 | |
1132 | fprintf (stderr, "result:\n"); | |
1133 | print_fixup (fixP); | |
1134 | #endif | |
1135 | } /* For each fixS in this segment. */ | |
e7ff5c73 AM |
1136 | } |
1137 | ||
a161fe53 | 1138 | static void |
d7342424 KH |
1139 | fix_segment (bfd *abfd ATTRIBUTE_UNUSED, |
1140 | asection *sec, | |
e7ff5c73 | 1141 | void *xxx ATTRIBUTE_UNUSED) |
a161fe53 AM |
1142 | { |
1143 | segment_info_type *seginfo = seg_info (sec); | |
1144 | ||
1145 | fixup_segment (seginfo->fix_root, sec); | |
1146 | } | |
1147 | ||
e5435dec AM |
1148 | static void |
1149 | install_reloc (asection *sec, arelent *reloc, fragS *fragp, | |
3b4dbbbf | 1150 | const char *file, unsigned int line) |
e5435dec AM |
1151 | { |
1152 | char *err; | |
1153 | bfd_reloc_status_type s; | |
76d12939 AM |
1154 | asymbol *sym; |
1155 | ||
1156 | if (reloc->sym_ptr_ptr != NULL | |
1157 | && (sym = *reloc->sym_ptr_ptr) != NULL | |
1158 | && (sym->flags & BSF_KEEP) == 0 | |
1159 | && ((sym->flags & BSF_SECTION_SYM) == 0 | |
55f8b826 AM |
1160 | || (EMIT_SECTION_SYMBOLS |
1161 | && !bfd_is_abs_section (sym->section)))) | |
76d12939 | 1162 | as_bad_where (file, line, _("redefined symbol cannot be used on reloc")); |
e5435dec AM |
1163 | |
1164 | s = bfd_install_relocation (stdoutput, reloc, | |
1165 | fragp->fr_literal, fragp->fr_address, | |
1166 | sec, &err); | |
1167 | switch (s) | |
1168 | { | |
1169 | case bfd_reloc_ok: | |
1170 | break; | |
1171 | case bfd_reloc_overflow: | |
1172 | as_bad_where (file, line, _("relocation overflow")); | |
1173 | break; | |
1174 | case bfd_reloc_outofrange: | |
1175 | as_bad_where (file, line, _("relocation out of range")); | |
1176 | break; | |
1177 | default: | |
1178 | as_fatal (_("%s:%u: bad return from bfd_install_relocation: %x"), | |
1179 | file, line, s); | |
1180 | } | |
1181 | } | |
1182 | ||
7230378d AM |
1183 | static fragS * |
1184 | get_frag_for_reloc (fragS *last_frag, | |
1185 | const segment_info_type *seginfo, | |
1186 | const struct reloc_list *r) | |
1187 | { | |
1188 | fragS *f; | |
34bca508 | 1189 | |
7230378d AM |
1190 | for (f = last_frag; f != NULL; f = f->fr_next) |
1191 | if (f->fr_address <= r->u.b.r.address | |
1192 | && r->u.b.r.address < f->fr_address + f->fr_fix) | |
1193 | return f; | |
1194 | ||
1195 | for (f = seginfo->frchainP->frch_root; f != NULL; f = f->fr_next) | |
1196 | if (f->fr_address <= r->u.b.r.address | |
1197 | && r->u.b.r.address < f->fr_address + f->fr_fix) | |
1198 | return f; | |
1199 | ||
740bdc67 AM |
1200 | for (f = seginfo->frchainP->frch_root; f != NULL; f = f->fr_next) |
1201 | if (f->fr_address <= r->u.b.r.address | |
1202 | && r->u.b.r.address <= f->fr_address + f->fr_fix) | |
1203 | return f; | |
1204 | ||
7230378d AM |
1205 | as_bad_where (r->file, r->line, |
1206 | _("reloc not within (fixed part of) section")); | |
1207 | return NULL; | |
1208 | } | |
1209 | ||
252b5132 | 1210 | static void |
e7ff5c73 | 1211 | write_relocs (bfd *abfd, asection *sec, void *xxx ATTRIBUTE_UNUSED) |
252b5132 RH |
1212 | { |
1213 | segment_info_type *seginfo = seg_info (sec); | |
252b5132 | 1214 | unsigned int n; |
05e9452c | 1215 | struct reloc_list *my_reloc_list, **rp, *r; |
252b5132 RH |
1216 | arelent **relocs; |
1217 | fixS *fixp; | |
7230378d | 1218 | fragS *last_frag; |
252b5132 RH |
1219 | |
1220 | /* If seginfo is NULL, we did not create this section; don't do | |
1221 | anything with it. */ | |
1222 | if (seginfo == NULL) | |
1223 | return; | |
1224 | ||
252b5132 RH |
1225 | n = 0; |
1226 | for (fixp = seginfo->fix_root; fixp; fixp = fixp->fx_next) | |
e5435dec AM |
1227 | if (!fixp->fx_done) |
1228 | n++; | |
1229 | ||
1230 | #ifdef RELOC_EXPANSION_POSSIBLE | |
1231 | n *= MAX_RELOC_EXPANSION; | |
1232 | #endif | |
252b5132 | 1233 | |
05e9452c AM |
1234 | /* Extract relocs for this section from reloc_list. */ |
1235 | rp = &reloc_list; | |
1236 | my_reloc_list = NULL; | |
1237 | while ((r = *rp) != NULL) | |
1238 | { | |
1239 | if (r->u.b.sec == sec) | |
1240 | { | |
1241 | *rp = r->next; | |
1242 | r->next = my_reloc_list; | |
1243 | my_reloc_list = r; | |
1244 | n++; | |
1245 | } | |
1246 | else | |
1247 | rp = &r->next; | |
1248 | } | |
1249 | ||
add39d23 | 1250 | relocs = XCNEWVEC (arelent *, n); |
252b5132 | 1251 | |
7230378d AM |
1252 | n = 0; |
1253 | r = my_reloc_list; | |
1254 | last_frag = NULL; | |
252b5132 RH |
1255 | for (fixp = seginfo->fix_root; fixp != (fixS *) NULL; fixp = fixp->fx_next) |
1256 | { | |
d31f0f6d AM |
1257 | int fx_size, slack; |
1258 | offsetT loc; | |
7230378d AM |
1259 | arelent **reloc; |
1260 | #ifndef RELOC_EXPANSION_POSSIBLE | |
1261 | arelent *rel; | |
1262 | ||
1263 | reloc = &rel; | |
1264 | #endif | |
252b5132 RH |
1265 | |
1266 | if (fixp->fx_done) | |
e5435dec | 1267 | continue; |
252b5132 | 1268 | |
d31f0f6d AM |
1269 | fx_size = fixp->fx_size; |
1270 | slack = TC_FX_SIZE_SLACK (fixp); | |
1271 | if (slack > 0) | |
1272 | fx_size = fx_size > slack ? fx_size - slack : 0; | |
1273 | loc = fixp->fx_where + fx_size; | |
e5435dec | 1274 | if (slack >= 0 && loc > fixp->fx_frag->fr_fix) |
d31f0f6d AM |
1275 | as_bad_where (fixp->fx_file, fixp->fx_line, |
1276 | _("internal error: fixup not contained within frag")); | |
252b5132 | 1277 | |
e5435dec | 1278 | #ifndef RELOC_EXPANSION_POSSIBLE |
7230378d | 1279 | *reloc = tc_gen_reloc (sec, fixp); |
e5435dec | 1280 | #else |
7230378d AM |
1281 | reloc = tc_gen_reloc (sec, fixp); |
1282 | #endif | |
252b5132 | 1283 | |
7230378d AM |
1284 | while (*reloc) |
1285 | { | |
1286 | while (r != NULL && r->u.b.r.address < (*reloc)->address) | |
1287 | { | |
1288 | fragS *f = get_frag_for_reloc (last_frag, seginfo, r); | |
1289 | if (f != NULL) | |
1290 | { | |
1291 | last_frag = f; | |
1292 | relocs[n++] = &r->u.b.r; | |
1293 | install_reloc (sec, &r->u.b.r, f, r->file, r->line); | |
1294 | } | |
1295 | r = r->next; | |
1296 | } | |
1297 | relocs[n++] = *reloc; | |
1298 | install_reloc (sec, *reloc, fixp->fx_frag, | |
1299 | fixp->fx_file, fixp->fx_line); | |
1300 | #ifndef RELOC_EXPANSION_POSSIBLE | |
1301 | break; | |
1302 | #else | |
1303 | reloc++; | |
e5435dec | 1304 | #endif |
7230378d AM |
1305 | } |
1306 | } | |
d31f0f6d | 1307 | |
7230378d AM |
1308 | while (r != NULL) |
1309 | { | |
1310 | fragS *f = get_frag_for_reloc (last_frag, seginfo, r); | |
1311 | if (f != NULL) | |
1312 | { | |
1313 | last_frag = f; | |
1314 | relocs[n++] = &r->u.b.r; | |
1315 | install_reloc (sec, &r->u.b.r, f, r->file, r->line); | |
1316 | } | |
1317 | r = r->next; | |
252b5132 | 1318 | } |
252b5132 RH |
1319 | |
1320 | #ifdef DEBUG4 | |
1321 | { | |
1596988d | 1322 | unsigned int k, j, nsyms; |
252b5132 RH |
1323 | asymbol **sympp; |
1324 | sympp = bfd_get_outsymbols (stdoutput); | |
1325 | nsyms = bfd_get_symcount (stdoutput); | |
1596988d TG |
1326 | for (k = 0; k < n; k++) |
1327 | if (((*relocs[k]->sym_ptr_ptr)->flags & BSF_SECTION_SYM) == 0) | |
252b5132 RH |
1328 | { |
1329 | for (j = 0; j < nsyms; j++) | |
1596988d | 1330 | if (sympp[j] == *relocs[k]->sym_ptr_ptr) |
252b5132 RH |
1331 | break; |
1332 | if (j == nsyms) | |
1333 | abort (); | |
1334 | } | |
1335 | } | |
1336 | #endif | |
1337 | ||
1338 | if (n) | |
e5435dec AM |
1339 | { |
1340 | flagword flags = bfd_get_section_flags (abfd, sec); | |
1341 | flags |= SEC_RELOC; | |
1342 | bfd_set_section_flags (abfd, sec, flags); | |
1343 | bfd_set_reloc (stdoutput, sec, relocs, n); | |
1344 | } | |
252b5132 | 1345 | |
945a1a6b ILT |
1346 | #ifdef SET_SECTION_RELOCS |
1347 | SET_SECTION_RELOCS (sec, relocs, n); | |
1348 | #endif | |
1349 | ||
252b5132 RH |
1350 | #ifdef DEBUG3 |
1351 | { | |
1596988d TG |
1352 | unsigned int k; |
1353 | ||
252b5132 | 1354 | fprintf (stderr, "relocs for sec %s\n", sec->name); |
1596988d | 1355 | for (k = 0; k < n; k++) |
252b5132 | 1356 | { |
1596988d TG |
1357 | arelent *rel = relocs[k]; |
1358 | asymbol *s = *rel->sym_ptr_ptr; | |
988392e2 | 1359 | fprintf (stderr, " reloc %2d @%p off %4lx : sym %-10s addend %lx\n", |
1596988d TG |
1360 | k, rel, (unsigned long)rel->address, s->name, |
1361 | (unsigned long)rel->addend); | |
252b5132 RH |
1362 | } |
1363 | } | |
1364 | #endif | |
1365 | } | |
1366 | ||
0acf065b CC |
1367 | static int |
1368 | compress_frag (struct z_stream_s *strm, const char *contents, int in_size, | |
1369 | fragS **last_newf, struct obstack *ob) | |
1370 | { | |
1371 | int out_size; | |
1372 | int total_out_size = 0; | |
1373 | fragS *f = *last_newf; | |
1374 | char *next_out; | |
1375 | int avail_out; | |
1376 | ||
1377 | /* Call the compression routine repeatedly until it has finished | |
1378 | processing the frag. */ | |
1379 | while (in_size > 0) | |
1380 | { | |
1381 | /* Reserve all the space available in the current chunk. | |
1382 | If none is available, start a new frag. */ | |
1383 | avail_out = obstack_room (ob); | |
1384 | if (avail_out <= 0) | |
1385 | { | |
1386 | obstack_finish (ob); | |
1387 | f = frag_alloc (ob); | |
1388 | f->fr_type = rs_fill; | |
1389 | (*last_newf)->fr_next = f; | |
1390 | *last_newf = f; | |
1391 | avail_out = obstack_room (ob); | |
1392 | } | |
1393 | if (avail_out <= 0) | |
1394 | as_fatal (_("can't extend frag")); | |
1395 | next_out = obstack_next_free (ob); | |
1396 | obstack_blank_fast (ob, avail_out); | |
1397 | out_size = compress_data (strm, &contents, &in_size, | |
1398 | &next_out, &avail_out); | |
1399 | if (out_size < 0) | |
1400 | return -1; | |
1401 | ||
1402 | f->fr_fix += out_size; | |
1403 | total_out_size += out_size; | |
1404 | ||
1405 | /* Return unused space. */ | |
1406 | if (avail_out > 0) | |
1407 | obstack_blank_fast (ob, -avail_out); | |
1408 | } | |
1409 | ||
1410 | return total_out_size; | |
1411 | } | |
1412 | ||
1413 | static void | |
1414 | compress_debug (bfd *abfd, asection *sec, void *xxx ATTRIBUTE_UNUSED) | |
1415 | { | |
1416 | segment_info_type *seginfo = seg_info (sec); | |
1417 | fragS *f; | |
1418 | fragS *first_newf; | |
1419 | fragS *last_newf; | |
1420 | struct obstack *ob = &seginfo->frchainP->frch_obstack; | |
1421 | bfd_size_type uncompressed_size = (bfd_size_type) sec->size; | |
1422 | bfd_size_type compressed_size; | |
1423 | const char *section_name; | |
1424 | char *compressed_name; | |
1425 | char *header; | |
1426 | struct z_stream_s *strm; | |
1427 | int x; | |
4a114e3e | 1428 | flagword flags = bfd_get_section_flags (abfd, sec); |
151411f8 | 1429 | unsigned int header_size, compression_header_size; |
0acf065b CC |
1430 | |
1431 | if (seginfo == NULL | |
6ac88ef3 | 1432 | || sec->size < 32 |
4a114e3e | 1433 | || (flags & (SEC_ALLOC | SEC_HAS_CONTENTS)) == SEC_ALLOC) |
0acf065b CC |
1434 | return; |
1435 | ||
1436 | section_name = bfd_get_section_name (stdoutput, sec); | |
1437 | if (strncmp (section_name, ".debug_", 7) != 0) | |
1438 | return; | |
1439 | ||
1440 | strm = compress_init (); | |
1441 | if (strm == NULL) | |
1442 | return; | |
1443 | ||
151411f8 | 1444 | if (flag_compress_debug == COMPRESS_DEBUG_GABI_ZLIB) |
dab394de | 1445 | { |
dab394de L |
1446 | compression_header_size |
1447 | = bfd_get_compression_header_size (stdoutput, NULL); | |
1448 | header_size = compression_header_size; | |
1449 | } | |
151411f8 | 1450 | else |
dab394de | 1451 | { |
dab394de L |
1452 | compression_header_size = 0; |
1453 | header_size = 12; | |
1454 | } | |
151411f8 | 1455 | |
dab394de | 1456 | /* Create a new frag to contain the compression header. */ |
0acf065b | 1457 | first_newf = frag_alloc (ob); |
151411f8 | 1458 | if (obstack_room (ob) < header_size) |
0acf065b | 1459 | first_newf = frag_alloc (ob); |
151411f8 L |
1460 | if (obstack_room (ob) < header_size) |
1461 | as_fatal (_("can't extend frag %u chars"), header_size); | |
0acf065b | 1462 | last_newf = first_newf; |
151411f8 | 1463 | obstack_blank_fast (ob, header_size); |
0acf065b | 1464 | last_newf->fr_type = rs_fill; |
151411f8 | 1465 | last_newf->fr_fix = header_size; |
0acf065b | 1466 | header = last_newf->fr_literal; |
151411f8 | 1467 | compressed_size = header_size; |
0acf065b CC |
1468 | |
1469 | /* Stream the frags through the compression engine, adding new frags | |
2b0f3761 | 1470 | as necessary to accommodate the compressed output. */ |
0acf065b CC |
1471 | for (f = seginfo->frchainP->frch_root; |
1472 | f; | |
1473 | f = f->fr_next) | |
1474 | { | |
1475 | offsetT fill_size; | |
1476 | char *fill_literal; | |
1477 | offsetT count; | |
1478 | int out_size; | |
1479 | ||
1480 | gas_assert (f->fr_type == rs_fill); | |
1481 | if (f->fr_fix) | |
1482 | { | |
1483 | out_size = compress_frag (strm, f->fr_literal, f->fr_fix, | |
1484 | &last_newf, ob); | |
1485 | if (out_size < 0) | |
1486 | return; | |
1487 | compressed_size += out_size; | |
1488 | } | |
1489 | fill_literal = f->fr_literal + f->fr_fix; | |
1490 | fill_size = f->fr_var; | |
1491 | count = f->fr_offset; | |
1492 | gas_assert (count >= 0); | |
1493 | if (fill_size && count) | |
1494 | { | |
1495 | while (count--) | |
1496 | { | |
1497 | out_size = compress_frag (strm, fill_literal, (int) fill_size, | |
1498 | &last_newf, ob); | |
1499 | if (out_size < 0) | |
1500 | return; | |
1501 | compressed_size += out_size; | |
1502 | } | |
1503 | } | |
1504 | } | |
1505 | ||
1506 | /* Flush the compression state. */ | |
1507 | for (;;) | |
1508 | { | |
1509 | int avail_out; | |
1510 | char *next_out; | |
1511 | int out_size; | |
1512 | ||
1513 | /* Reserve all the space available in the current chunk. | |
1514 | If none is available, start a new frag. */ | |
1515 | avail_out = obstack_room (ob); | |
1516 | if (avail_out <= 0) | |
1517 | { | |
1518 | fragS *newf; | |
1519 | ||
1520 | obstack_finish (ob); | |
1521 | newf = frag_alloc (ob); | |
1522 | newf->fr_type = rs_fill; | |
1523 | last_newf->fr_next = newf; | |
1524 | last_newf = newf; | |
1525 | avail_out = obstack_room (ob); | |
1526 | } | |
1527 | if (avail_out <= 0) | |
1528 | as_fatal (_("can't extend frag")); | |
1529 | next_out = obstack_next_free (ob); | |
1530 | obstack_blank_fast (ob, avail_out); | |
1531 | x = compress_finish (strm, &next_out, &avail_out, &out_size); | |
1532 | if (x < 0) | |
1533 | return; | |
1534 | ||
1535 | last_newf->fr_fix += out_size; | |
1536 | compressed_size += out_size; | |
1537 | ||
1538 | /* Return unused space. */ | |
1539 | if (avail_out > 0) | |
1540 | obstack_blank_fast (ob, -avail_out); | |
1541 | ||
1542 | if (x == 0) | |
1543 | break; | |
1544 | } | |
1545 | ||
b422eb49 L |
1546 | /* PR binutils/18087: If compression didn't make the section smaller, |
1547 | just keep it uncompressed. */ | |
317974f6 | 1548 | if (compressed_size >= uncompressed_size) |
273a4985 | 1549 | return; |
d94077e2 | 1550 | |
0acf065b CC |
1551 | /* Replace the uncompressed frag list with the compressed frag list. */ |
1552 | seginfo->frchainP->frch_root = first_newf; | |
1553 | seginfo->frchainP->frch_last = last_newf; | |
1554 | ||
1555 | /* Update the section size and its name. */ | |
151411f8 | 1556 | bfd_update_compression_header (abfd, (bfd_byte *) header, sec); |
0acf065b CC |
1557 | x = bfd_set_section_size (abfd, sec, compressed_size); |
1558 | gas_assert (x); | |
151411f8 L |
1559 | if (!compression_header_size) |
1560 | { | |
29a2809e | 1561 | compressed_name = concat (".z", section_name + 1, (char *) NULL); |
151411f8 L |
1562 | bfd_section_name (stdoutput, sec) = compressed_name; |
1563 | } | |
0acf065b CC |
1564 | } |
1565 | ||
252b5132 | 1566 | static void |
d7342424 KH |
1567 | write_contents (bfd *abfd ATTRIBUTE_UNUSED, |
1568 | asection *sec, | |
e7ff5c73 | 1569 | void *xxx ATTRIBUTE_UNUSED) |
252b5132 RH |
1570 | { |
1571 | segment_info_type *seginfo = seg_info (sec); | |
685736be | 1572 | addressT offset = 0; |
252b5132 RH |
1573 | fragS *f; |
1574 | ||
1575 | /* Write out the frags. */ | |
1576 | if (seginfo == NULL | |
efaf0ba4 | 1577 | || !(bfd_get_section_flags (abfd, sec) & SEC_HAS_CONTENTS)) |
252b5132 RH |
1578 | return; |
1579 | ||
1580 | for (f = seginfo->frchainP->frch_root; | |
1581 | f; | |
1582 | f = f->fr_next) | |
1583 | { | |
1584 | int x; | |
685736be | 1585 | addressT fill_size; |
252b5132 | 1586 | char *fill_literal; |
685736be | 1587 | offsetT count; |
252b5132 | 1588 | |
9c2799c2 | 1589 | gas_assert (f->fr_type == rs_fill); |
252b5132 RH |
1590 | if (f->fr_fix) |
1591 | { | |
1592 | x = bfd_set_section_contents (stdoutput, sec, | |
1593 | f->fr_literal, (file_ptr) offset, | |
1594 | (bfd_size_type) f->fr_fix); | |
b34976b6 | 1595 | if (!x) |
ba592044 AM |
1596 | as_fatal (_("can't write %ld bytes to section %s of %s because: '%s'"), |
1597 | (long) f->fr_fix, sec->name, | |
1598 | stdoutput->filename, | |
885afe7b | 1599 | bfd_errmsg (bfd_get_error ())); |
252b5132 RH |
1600 | offset += f->fr_fix; |
1601 | } | |
1602 | fill_literal = f->fr_literal + f->fr_fix; | |
1603 | fill_size = f->fr_var; | |
1604 | count = f->fr_offset; | |
9c2799c2 | 1605 | gas_assert (count >= 0); |
252b5132 RH |
1606 | if (fill_size && count) |
1607 | { | |
1608 | char buf[256]; | |
efaf0ba4 | 1609 | if (fill_size > sizeof (buf)) |
252b5132 | 1610 | { |
efaf0ba4 | 1611 | /* Do it the old way. Can this ever happen? */ |
252b5132 RH |
1612 | while (count--) |
1613 | { | |
1614 | x = bfd_set_section_contents (stdoutput, sec, | |
1615 | fill_literal, | |
1616 | (file_ptr) offset, | |
1617 | (bfd_size_type) fill_size); | |
b34976b6 | 1618 | if (!x) |
ba592044 AM |
1619 | as_fatal (_("can't fill %ld bytes in section %s of %s because '%s'"), |
1620 | (long) fill_size, sec->name, | |
1621 | stdoutput->filename, | |
885afe7b | 1622 | bfd_errmsg (bfd_get_error ())); |
252b5132 RH |
1623 | offset += fill_size; |
1624 | } | |
1625 | } | |
1626 | else | |
1627 | { | |
1628 | /* Build a buffer full of fill objects and output it as | |
1629 | often as necessary. This saves on the overhead of | |
1630 | potentially lots of bfd_set_section_contents calls. */ | |
1631 | int n_per_buf, i; | |
1632 | if (fill_size == 1) | |
1633 | { | |
1634 | n_per_buf = sizeof (buf); | |
1635 | memset (buf, *fill_literal, n_per_buf); | |
1636 | } | |
1637 | else | |
1638 | { | |
1639 | char *bufp; | |
efaf0ba4 | 1640 | n_per_buf = sizeof (buf) / fill_size; |
252b5132 | 1641 | for (i = n_per_buf, bufp = buf; i; i--, bufp += fill_size) |
efaf0ba4 | 1642 | memcpy (bufp, fill_literal, fill_size); |
252b5132 RH |
1643 | } |
1644 | for (; count > 0; count -= n_per_buf) | |
1645 | { | |
1646 | n_per_buf = n_per_buf > count ? count : n_per_buf; | |
efaf0ba4 NC |
1647 | x = bfd_set_section_contents |
1648 | (stdoutput, sec, buf, (file_ptr) offset, | |
1649 | (bfd_size_type) n_per_buf * fill_size); | |
b34976b6 | 1650 | if (!x) |
ba592044 AM |
1651 | as_fatal (_("cannot fill %ld bytes in section %s of %s because: '%s'"), |
1652 | (long)(n_per_buf * fill_size), sec->name, | |
a22429b9 NC |
1653 | stdoutput->filename, |
1654 | bfd_errmsg (bfd_get_error ())); | |
252b5132 RH |
1655 | offset += n_per_buf * fill_size; |
1656 | } | |
1657 | } | |
1658 | } | |
1659 | } | |
1660 | } | |
252b5132 | 1661 | |
252b5132 | 1662 | static void |
d7342424 | 1663 | merge_data_into_text (void) |
252b5132 | 1664 | { |
252b5132 RH |
1665 | seg_info (text_section)->frchainP->frch_last->fr_next = |
1666 | seg_info (data_section)->frchainP->frch_root; | |
1667 | seg_info (text_section)->frchainP->frch_last = | |
1668 | seg_info (data_section)->frchainP->frch_last; | |
1669 | seg_info (data_section)->frchainP = 0; | |
252b5132 | 1670 | } |
252b5132 | 1671 | |
252b5132 | 1672 | static void |
d7342424 | 1673 | set_symtab (void) |
252b5132 RH |
1674 | { |
1675 | int nsyms; | |
1676 | asymbol **asympp; | |
1677 | symbolS *symp; | |
b34976b6 | 1678 | bfd_boolean result; |
252b5132 RH |
1679 | |
1680 | /* Count symbols. We can't rely on a count made by the loop in | |
1681 | write_object_file, because *_frob_file may add a new symbol or | |
1682 | two. */ | |
1683 | nsyms = 0; | |
1684 | for (symp = symbol_rootP; symp; symp = symbol_next (symp)) | |
1685 | nsyms++; | |
1686 | ||
1687 | if (nsyms) | |
1688 | { | |
1689 | int i; | |
0e1a166b | 1690 | bfd_size_type amt = (bfd_size_type) nsyms * sizeof (asymbol *); |
252b5132 | 1691 | |
1e9cc1c2 | 1692 | asympp = (asymbol **) bfd_alloc (stdoutput, amt); |
252b5132 RH |
1693 | symp = symbol_rootP; |
1694 | for (i = 0; i < nsyms; i++, symp = symbol_next (symp)) | |
1695 | { | |
49309057 | 1696 | asympp[i] = symbol_get_bfdsym (symp); |
76d12939 AM |
1697 | if (asympp[i]->flags != BSF_SECTION_SYM |
1698 | || !(bfd_is_const_section (asympp[i]->section) | |
1699 | && asympp[i]->section->symbol == asympp[i])) | |
1700 | asympp[i]->flags |= BSF_KEEP; | |
49309057 | 1701 | symbol_mark_written (symp); |
252b5132 RH |
1702 | } |
1703 | } | |
1704 | else | |
1705 | asympp = 0; | |
1706 | result = bfd_set_symtab (stdoutput, asympp, nsyms); | |
9c2799c2 | 1707 | gas_assert (result); |
252b5132 RH |
1708 | symbol_table_frozen = 1; |
1709 | } | |
252b5132 RH |
1710 | |
1711 | /* Finish the subsegments. After every sub-segment, we fake an | |
2edb36e7 | 1712 | ".align ...". This conforms to BSD4.2 brain-damage. We then fake |
252b5132 RH |
1713 | ".fill 0" because that is the kind of frag that requires least |
1714 | thought. ".align" frags like to have a following frag since that | |
1715 | makes calculating their intended length trivial. */ | |
1716 | ||
1717 | #ifndef SUB_SEGMENT_ALIGN | |
18e1d487 | 1718 | #ifdef HANDLE_ALIGN |
436d9e46 | 1719 | /* The last subsegment gets an alignment corresponding to the alignment |
18e1d487 AM |
1720 | of the section. This allows proper nop-filling at the end of |
1721 | code-bearing sections. */ | |
1722 | #define SUB_SEGMENT_ALIGN(SEG, FRCHAIN) \ | |
9028d943 | 1723 | (!(FRCHAIN)->frch_next && subseg_text_p (SEG) \ |
2edb36e7 | 1724 | && !do_not_pad_sections_to_alignment \ |
9028d943 AM |
1725 | ? get_recorded_alignment (SEG) \ |
1726 | : 0) | |
18e1d487 | 1727 | #else |
18e1d487 | 1728 | #define SUB_SEGMENT_ALIGN(SEG, FRCHAIN) 0 |
252b5132 RH |
1729 | #endif |
1730 | #endif | |
1731 | ||
85024cd8 | 1732 | static void |
d98b0e2b | 1733 | subsegs_finish_section (asection *s) |
252b5132 RH |
1734 | { |
1735 | struct frchain *frchainP; | |
d98b0e2b TG |
1736 | segment_info_type *seginfo = seg_info (s); |
1737 | if (!seginfo) | |
1738 | return; | |
252b5132 | 1739 | |
d98b0e2b TG |
1740 | for (frchainP = seginfo->frchainP; |
1741 | frchainP != NULL; | |
1742 | frchainP = frchainP->frch_next) | |
252b5132 | 1743 | { |
93a24ba7 | 1744 | int alignment; |
0a9ef439 | 1745 | |
d98b0e2b | 1746 | subseg_set (s, frchainP->frch_subseg); |
381a1ab3 | 1747 | |
d98b0e2b TG |
1748 | /* This now gets called even if we had errors. In that case, |
1749 | any alignment is meaningless, and, moreover, will look weird | |
1750 | if we are generating a listing. */ | |
93a24ba7 MR |
1751 | if (had_errors ()) |
1752 | do_not_pad_sections_to_alignment = 1; | |
c9049d30 | 1753 | |
93a24ba7 MR |
1754 | alignment = SUB_SEGMENT_ALIGN (now_seg, frchainP); |
1755 | if ((bfd_get_section_flags (now_seg->owner, now_seg) & SEC_MERGE) | |
1756 | && now_seg->entsize) | |
1757 | { | |
1758 | unsigned int entsize = now_seg->entsize; | |
1759 | int entalign = 0; | |
d98b0e2b | 1760 | |
93a24ba7 MR |
1761 | while ((entsize & 1) == 0) |
1762 | { | |
1763 | ++entalign; | |
1764 | entsize >>= 1; | |
381a1ab3 | 1765 | } |
93a24ba7 MR |
1766 | |
1767 | if (entalign > alignment) | |
1768 | alignment = entalign; | |
d98b0e2b | 1769 | } |
0a9ef439 | 1770 | |
d98b0e2b TG |
1771 | if (subseg_text_p (now_seg)) |
1772 | frag_align_code (alignment, 0); | |
1773 | else | |
1774 | frag_align (alignment, 0, 0); | |
252b5132 | 1775 | |
d98b0e2b TG |
1776 | /* frag_align will have left a new frag. |
1777 | Use this last frag for an empty ".fill". | |
252b5132 | 1778 | |
d98b0e2b TG |
1779 | For this segment ... |
1780 | Create a last frag. Do not leave a "being filled in frag". */ | |
1781 | frag_wane (frag_now); | |
1782 | frag_now->fr_fix = 0; | |
1783 | know (frag_now->fr_next == NULL); | |
252b5132 RH |
1784 | } |
1785 | } | |
1786 | ||
d98b0e2b TG |
1787 | static void |
1788 | subsegs_finish (void) | |
1789 | { | |
1790 | asection *s; | |
1791 | ||
1792 | for (s = stdoutput->sections; s; s = s->next) | |
1793 | subsegs_finish_section (s); | |
1794 | } | |
1795 | ||
1796 | #ifdef OBJ_ELF | |
1797 | static void | |
1798 | create_obj_attrs_section (void) | |
1799 | { | |
1800 | segT s; | |
1801 | char *p; | |
1802 | offsetT size; | |
1803 | const char *name; | |
1804 | ||
1805 | size = bfd_elf_obj_attr_size (stdoutput); | |
1806 | if (size) | |
1807 | { | |
1808 | name = get_elf_backend_data (stdoutput)->obj_attrs_section; | |
1809 | if (!name) | |
1810 | name = ".gnu.attributes"; | |
1811 | s = subseg_new (name, 0); | |
1812 | elf_section_type (s) | |
1813 | = get_elf_backend_data (stdoutput)->obj_attrs_section_type; | |
1814 | bfd_set_section_flags (stdoutput, s, SEC_READONLY | SEC_DATA); | |
1815 | frag_now_fix (); | |
1816 | p = frag_more (size); | |
1817 | bfd_elf_set_obj_attr_contents (stdoutput, (bfd_byte *)p, size); | |
1818 | ||
1819 | subsegs_finish_section (s); | |
1820 | relax_segment (seg_info (s)->frchainP->frch_root, s, 0); | |
1821 | size_seg (stdoutput, s, NULL); | |
1822 | } | |
1823 | } | |
1824 | #endif | |
1825 | ||
252b5132 RH |
1826 | /* Write the object file. */ |
1827 | ||
1828 | void | |
d7342424 | 1829 | write_object_file (void) |
252b5132 | 1830 | { |
32638454 | 1831 | struct relax_seg_info rsi; |
7be1c489 | 1832 | #ifndef WORKING_DOT_WORD |
efaf0ba4 | 1833 | fragS *fragP; /* Track along all frags. */ |
252b5132 RH |
1834 | #endif |
1835 | ||
85024cd8 AM |
1836 | subsegs_finish (); |
1837 | ||
16a87420 IS |
1838 | #ifdef md_pre_output_hook |
1839 | md_pre_output_hook; | |
1840 | #endif | |
1841 | ||
cdaa5616 IS |
1842 | #ifdef md_pre_relax_hook |
1843 | md_pre_relax_hook; | |
1844 | #endif | |
1845 | ||
252b5132 | 1846 | /* From now on, we don't care about sub-segments. Build one frag chain |
2b0f3761 | 1847 | for each segment. Linked through fr_next. */ |
252b5132 | 1848 | |
252b5132 RH |
1849 | /* Remove the sections created by gas for its own purposes. */ |
1850 | { | |
252b5132 RH |
1851 | int i; |
1852 | ||
5daa8fe7 L |
1853 | bfd_section_list_remove (stdoutput, reg_section); |
1854 | bfd_section_list_remove (stdoutput, expr_section); | |
1855 | stdoutput->section_count -= 2; | |
252b5132 RH |
1856 | i = 0; |
1857 | bfd_map_over_sections (stdoutput, renumber_sections, &i); | |
1858 | } | |
1859 | ||
1860 | bfd_map_over_sections (stdoutput, chain_frchains_together, (char *) 0); | |
252b5132 RH |
1861 | |
1862 | /* We have two segments. If user gave -R flag, then we must put the | |
1863 | data frags into the text segment. Do this before relaxing so | |
1864 | we know to take advantage of -R and make shorter addresses. */ | |
252b5132 RH |
1865 | if (flag_readonly_data_in_text) |
1866 | { | |
1867 | merge_data_into_text (); | |
1868 | } | |
252b5132 | 1869 | |
32638454 | 1870 | rsi.pass = 0; |
e46d99eb AM |
1871 | while (1) |
1872 | { | |
aacb5251 HPN |
1873 | #ifndef WORKING_DOT_WORD |
1874 | /* We need to reset the markers in the broken word list and | |
1875 | associated frags between calls to relax_segment (via | |
1876 | relax_seg). Since the broken word list is global, we do it | |
1877 | once per round, rather than locally in relax_segment for each | |
1878 | segment. */ | |
1879 | struct broken_word *brokp; | |
1880 | ||
1881 | for (brokp = broken_words; | |
1882 | brokp != (struct broken_word *) NULL; | |
1883 | brokp = brokp->next_broken_word) | |
1884 | { | |
1885 | brokp->added = 0; | |
1886 | ||
1887 | if (brokp->dispfrag != (fragS *) NULL | |
1888 | && brokp->dispfrag->fr_type == rs_broken_word) | |
1889 | brokp->dispfrag->fr_subtype = 0; | |
1890 | } | |
1891 | #endif | |
1892 | ||
32638454 AM |
1893 | rsi.changed = 0; |
1894 | bfd_map_over_sections (stdoutput, relax_seg, &rsi); | |
1895 | rsi.pass++; | |
1896 | if (!rsi.changed) | |
e46d99eb AM |
1897 | break; |
1898 | } | |
e027f3e8 | 1899 | |
87548816 NC |
1900 | /* Note - Most ports will use the default value of |
1901 | TC_FINALIZE_SYMS_BEFORE_SIZE_SEG, which 1. This will force | |
1902 | local symbols to be resolved, removing their frag information. | |
1903 | Some ports however, will not have finished relaxing all of | |
1904 | their frags and will still need the local symbol frag | |
1905 | information. These ports can set | |
1906 | TC_FINALIZE_SYMS_BEFORE_SIZE_SEG to 0. */ | |
1907 | finalize_syms = TC_FINALIZE_SYMS_BEFORE_SIZE_SEG; | |
1908 | ||
e46d99eb | 1909 | bfd_map_over_sections (stdoutput, size_seg, (char *) 0); |
e46d99eb | 1910 | |
38b87a1b NC |
1911 | /* Relaxation has completed. Freeze all syms. */ |
1912 | finalize_syms = 1; | |
1913 | ||
ba8826a8 AO |
1914 | dwarf2dbg_final_check (); |
1915 | ||
e0001a05 NC |
1916 | #ifdef md_post_relax_hook |
1917 | md_post_relax_hook; | |
1918 | #endif | |
1919 | ||
d98b0e2b TG |
1920 | #ifdef OBJ_ELF |
1921 | if (IS_ELF) | |
1922 | create_obj_attrs_section (); | |
1923 | #endif | |
1924 | ||
252b5132 RH |
1925 | #ifndef WORKING_DOT_WORD |
1926 | { | |
1927 | struct broken_word *lie; | |
1928 | struct broken_word **prevP; | |
1929 | ||
1930 | prevP = &broken_words; | |
1931 | for (lie = broken_words; lie; lie = lie->next_broken_word) | |
1932 | if (!lie->added) | |
1933 | { | |
1934 | expressionS exp; | |
1935 | ||
1936 | subseg_change (lie->seg, lie->subseg); | |
1937 | exp.X_op = O_subtract; | |
1938 | exp.X_add_symbol = lie->add; | |
1939 | exp.X_op_symbol = lie->sub; | |
1940 | exp.X_add_number = lie->addnum; | |
252b5132 RH |
1941 | #ifdef TC_CONS_FIX_NEW |
1942 | TC_CONS_FIX_NEW (lie->frag, | |
efaf0ba4 | 1943 | lie->word_goes_here - lie->frag->fr_literal, |
62ebcb5c | 1944 | 2, &exp, TC_PARSE_CONS_RETURN_NONE); |
252b5132 RH |
1945 | #else |
1946 | fix_new_exp (lie->frag, | |
1947 | lie->word_goes_here - lie->frag->fr_literal, | |
1948 | 2, &exp, 0, BFD_RELOC_16); | |
1949 | #endif | |
252b5132 RH |
1950 | *prevP = lie->next_broken_word; |
1951 | } | |
1952 | else | |
1953 | prevP = &(lie->next_broken_word); | |
1954 | ||
1955 | for (lie = broken_words; lie;) | |
1956 | { | |
1957 | struct broken_word *untruth; | |
1958 | char *table_ptr; | |
1959 | addressT table_addr; | |
1960 | addressT from_addr, to_addr; | |
1961 | int n, m; | |
1962 | ||
1963 | subseg_change (lie->seg, lie->subseg); | |
1964 | fragP = lie->dispfrag; | |
1965 | ||
1966 | /* Find out how many broken_words go here. */ | |
1967 | n = 0; | |
efaf0ba4 NC |
1968 | for (untruth = lie; |
1969 | untruth && untruth->dispfrag == fragP; | |
1970 | untruth = untruth->next_broken_word) | |
252b5132 RH |
1971 | if (untruth->added == 1) |
1972 | n++; | |
1973 | ||
1974 | table_ptr = lie->dispfrag->fr_opcode; | |
efaf0ba4 NC |
1975 | table_addr = (lie->dispfrag->fr_address |
1976 | + (table_ptr - lie->dispfrag->fr_literal)); | |
252b5132 RH |
1977 | /* Create the jump around the long jumps. This is a short |
1978 | jump from table_ptr+0 to table_ptr+n*long_jump_size. */ | |
1979 | from_addr = table_addr; | |
1980 | to_addr = table_addr + md_short_jump_size + n * md_long_jump_size; | |
efaf0ba4 NC |
1981 | md_create_short_jump (table_ptr, from_addr, to_addr, lie->dispfrag, |
1982 | lie->add); | |
252b5132 RH |
1983 | table_ptr += md_short_jump_size; |
1984 | table_addr += md_short_jump_size; | |
1985 | ||
efaf0ba4 NC |
1986 | for (m = 0; |
1987 | lie && lie->dispfrag == fragP; | |
1988 | m++, lie = lie->next_broken_word) | |
252b5132 RH |
1989 | { |
1990 | if (lie->added == 2) | |
1991 | continue; | |
efaf0ba4 | 1992 | /* Patch the jump table. */ |
187af7df | 1993 | for (untruth = (struct broken_word *) (fragP->fr_symbol); |
efaf0ba4 NC |
1994 | untruth && untruth->dispfrag == fragP; |
1995 | untruth = untruth->next_broken_word) | |
252b5132 RH |
1996 | { |
1997 | if (untruth->use_jump == lie) | |
187af7df HPN |
1998 | { |
1999 | /* This is the offset from ??? to table_ptr+0. | |
2000 | The target is the same for all users of this | |
2001 | md_long_jump, but the "sub" bases (and hence the | |
2002 | offsets) may be different. */ | |
2003 | addressT to_word = table_addr - S_GET_VALUE (untruth->sub); | |
2004 | #ifdef TC_CHECK_ADJUSTED_BROKEN_DOT_WORD | |
2005 | TC_CHECK_ADJUSTED_BROKEN_DOT_WORD (to_word, untruth); | |
2006 | #endif | |
2007 | md_number_to_chars (untruth->word_goes_here, to_word, 2); | |
2008 | } | |
252b5132 RH |
2009 | } |
2010 | ||
efaf0ba4 NC |
2011 | /* Install the long jump. */ |
2012 | /* This is a long jump from table_ptr+0 to the final target. */ | |
252b5132 RH |
2013 | from_addr = table_addr; |
2014 | to_addr = S_GET_VALUE (lie->add) + lie->addnum; | |
efaf0ba4 NC |
2015 | md_create_long_jump (table_ptr, from_addr, to_addr, lie->dispfrag, |
2016 | lie->add); | |
252b5132 RH |
2017 | table_ptr += md_long_jump_size; |
2018 | table_addr += md_long_jump_size; | |
2019 | } | |
2020 | } | |
2021 | } | |
efaf0ba4 | 2022 | #endif /* not WORKING_DOT_WORD */ |
252b5132 | 2023 | |
252b5132 RH |
2024 | /* Resolve symbol values. This needs to be done before processing |
2025 | the relocations. */ | |
2026 | if (symbol_rootP) | |
2027 | { | |
2028 | symbolS *symp; | |
2029 | ||
2030 | for (symp = symbol_rootP; symp; symp = symbol_next (symp)) | |
6386f3a7 | 2031 | resolve_symbol_value (symp); |
252b5132 | 2032 | } |
49309057 | 2033 | resolve_local_symbol_values (); |
05e9452c | 2034 | resolve_reloc_expr_symbols (); |
252b5132 RH |
2035 | |
2036 | PROGRESS (1); | |
2037 | ||
2038 | #ifdef tc_frob_file_before_adjust | |
2039 | tc_frob_file_before_adjust (); | |
2040 | #endif | |
2041 | #ifdef obj_frob_file_before_adjust | |
2042 | obj_frob_file_before_adjust (); | |
2043 | #endif | |
2044 | ||
efaf0ba4 | 2045 | bfd_map_over_sections (stdoutput, adjust_reloc_syms, (char *) 0); |
252b5132 | 2046 | |
a161fe53 AM |
2047 | #ifdef tc_frob_file_before_fix |
2048 | tc_frob_file_before_fix (); | |
2049 | #endif | |
2050 | #ifdef obj_frob_file_before_fix | |
2051 | obj_frob_file_before_fix (); | |
2052 | #endif | |
2053 | ||
2054 | bfd_map_over_sections (stdoutput, fix_segment, (char *) 0); | |
2055 | ||
252b5132 RH |
2056 | /* Set up symbol table, and write it out. */ |
2057 | if (symbol_rootP) | |
2058 | { | |
2059 | symbolS *symp; | |
aaac53f5 | 2060 | bfd_boolean skip_next_symbol = FALSE; |
252b5132 RH |
2061 | |
2062 | for (symp = symbol_rootP; symp; symp = symbol_next (symp)) | |
2063 | { | |
2064 | int punt = 0; | |
2065 | const char *name; | |
2066 | ||
aaac53f5 HPN |
2067 | if (skip_next_symbol) |
2068 | { | |
2069 | /* Don't do anything besides moving the value of the | |
2070 | symbol from the GAS value-field to the BFD value-field. */ | |
2071 | symbol_get_bfdsym (symp)->value = S_GET_VALUE (symp); | |
2072 | skip_next_symbol = FALSE; | |
2073 | continue; | |
2074 | } | |
2075 | ||
49309057 | 2076 | if (symbol_mri_common_p (symp)) |
252b5132 RH |
2077 | { |
2078 | if (S_IS_EXTERNAL (symp)) | |
2079 | as_bad (_("%s: global symbols not supported in common sections"), | |
2080 | S_GET_NAME (symp)); | |
2081 | symbol_remove (symp, &symbol_rootP, &symbol_lastP); | |
2082 | continue; | |
2083 | } | |
2084 | ||
2085 | name = S_GET_NAME (symp); | |
2086 | if (name) | |
2087 | { | |
efaf0ba4 NC |
2088 | const char *name2 = |
2089 | decode_local_label_name ((char *) S_GET_NAME (symp)); | |
252b5132 RH |
2090 | /* They only differ if `name' is a fb or dollar local |
2091 | label name. */ | |
2092 | if (name2 != name && ! S_IS_DEFINED (symp)) | |
0e389e77 | 2093 | as_bad (_("local label `%s' is not defined"), name2); |
252b5132 RH |
2094 | } |
2095 | ||
2096 | /* Do it again, because adjust_reloc_syms might introduce | |
2097 | more symbols. They'll probably only be section symbols, | |
2098 | but they'll still need to have the values computed. */ | |
6386f3a7 | 2099 | resolve_symbol_value (symp); |
252b5132 RH |
2100 | |
2101 | /* Skip symbols which were equated to undefined or common | |
b4b24b79 | 2102 | symbols. */ |
06e77878 AO |
2103 | if (symbol_equated_reloc_p (symp) |
2104 | || S_IS_WEAKREFR (symp)) | |
252b5132 | 2105 | { |
91d6fa6a NC |
2106 | const char *sname = S_GET_NAME (symp); |
2107 | ||
60938e80 | 2108 | if (S_IS_COMMON (symp) |
91d6fa6a | 2109 | && !TC_FAKE_LABEL (sname) |
76db0a2e | 2110 | && !S_IS_WEAKREFR (symp)) |
60938e80 L |
2111 | { |
2112 | expressionS *e = symbol_get_value_expression (symp); | |
91d6fa6a | 2113 | |
76db0a2e | 2114 | as_bad (_("`%s' can't be equated to common symbol `%s'"), |
91d6fa6a | 2115 | sname, S_GET_NAME (e->X_add_symbol)); |
60938e80 | 2116 | } |
d0548f34 L |
2117 | if (S_GET_SEGMENT (symp) == reg_section) |
2118 | { | |
2119 | /* Report error only if we know the symbol name. */ | |
2120 | if (S_GET_NAME (symp) != reg_section->name) | |
2121 | as_bad (_("can't make global register symbol `%s'"), | |
91d6fa6a | 2122 | sname); |
d0548f34 | 2123 | } |
252b5132 RH |
2124 | symbol_remove (symp, &symbol_rootP, &symbol_lastP); |
2125 | continue; | |
2126 | } | |
2127 | ||
252b5132 RH |
2128 | #ifdef obj_frob_symbol |
2129 | obj_frob_symbol (symp, punt); | |
2130 | #endif | |
2131 | #ifdef tc_frob_symbol | |
49309057 | 2132 | if (! punt || symbol_used_in_reloc_p (symp)) |
252b5132 RH |
2133 | tc_frob_symbol (symp, punt); |
2134 | #endif | |
2135 | ||
2136 | /* If we don't want to keep this symbol, splice it out of | |
2137 | the chain now. If EMIT_SECTION_SYMBOLS is 0, we never | |
2138 | want section symbols. Otherwise, we skip local symbols | |
2139 | and symbols that the frob_symbol macros told us to punt, | |
2140 | but we keep such symbols if they are used in relocs. */ | |
a161fe53 AM |
2141 | if (symp == abs_section_sym |
2142 | || (! EMIT_SECTION_SYMBOLS | |
2143 | && symbol_section_p (symp)) | |
e97b3f28 | 2144 | /* Note that S_IS_EXTERNAL and S_IS_LOCAL are not always |
252b5132 RH |
2145 | opposites. Sometimes the former checks flags and the |
2146 | latter examines the name... */ | |
e97b3f28 | 2147 | || (!S_IS_EXTERNAL (symp) |
461b725f AO |
2148 | && (punt || S_IS_LOCAL (symp) || |
2149 | (S_IS_WEAKREFD (symp) && ! symbol_used_p (symp))) | |
49309057 | 2150 | && ! symbol_used_in_reloc_p (symp))) |
252b5132 RH |
2151 | { |
2152 | symbol_remove (symp, &symbol_rootP, &symbol_lastP); | |
efaf0ba4 | 2153 | |
252b5132 RH |
2154 | /* After symbol_remove, symbol_next(symp) still returns |
2155 | the one that came after it in the chain. So we don't | |
2156 | need to do any extra cleanup work here. */ | |
252b5132 RH |
2157 | continue; |
2158 | } | |
2159 | ||
2160 | /* Make sure we really got a value for the symbol. */ | |
49309057 | 2161 | if (! symbol_resolved_p (symp)) |
252b5132 | 2162 | { |
0e389e77 | 2163 | as_bad (_("can't resolve value for symbol `%s'"), |
252b5132 | 2164 | S_GET_NAME (symp)); |
49309057 | 2165 | symbol_mark_resolved (symp); |
252b5132 RH |
2166 | } |
2167 | ||
2168 | /* Set the value into the BFD symbol. Up til now the value | |
2169 | has only been kept in the gas symbolS struct. */ | |
49309057 | 2170 | symbol_get_bfdsym (symp)->value = S_GET_VALUE (symp); |
aaac53f5 HPN |
2171 | |
2172 | /* A warning construct is a warning symbol followed by the | |
2173 | symbol warned about. Don't let anything object-format or | |
2174 | target-specific muck with it; it's ready for output. */ | |
2175 | if (symbol_get_bfdsym (symp)->flags & BSF_WARNING) | |
2176 | skip_next_symbol = TRUE; | |
252b5132 RH |
2177 | } |
2178 | } | |
2179 | ||
2180 | PROGRESS (1); | |
2181 | ||
2182 | /* Now do any format-specific adjustments to the symbol table, such | |
2183 | as adding file symbols. */ | |
2184 | #ifdef tc_adjust_symtab | |
2185 | tc_adjust_symtab (); | |
2186 | #endif | |
2187 | #ifdef obj_adjust_symtab | |
2188 | obj_adjust_symtab (); | |
2189 | #endif | |
2190 | ||
d0548f34 L |
2191 | /* Stop if there is an error. */ |
2192 | if (had_errors ()) | |
2193 | return; | |
2194 | ||
252b5132 RH |
2195 | /* Now that all the sizes are known, and contents correct, we can |
2196 | start writing to the file. */ | |
2ae08483 | 2197 | set_symtab (); |
252b5132 RH |
2198 | |
2199 | /* If *_frob_file changes the symbol value at this point, it is | |
2200 | responsible for moving the changed value into symp->bsym->value | |
2201 | as well. Hopefully all symbol value changing can be done in | |
2202 | *_frob_symbol. */ | |
2203 | #ifdef tc_frob_file | |
2204 | tc_frob_file (); | |
2205 | #endif | |
2206 | #ifdef obj_frob_file | |
2207 | obj_frob_file (); | |
2208 | #endif | |
f3d2b04b KT |
2209 | #ifdef obj_coff_generate_pdata |
2210 | obj_coff_generate_pdata (); | |
2211 | #endif | |
252b5132 RH |
2212 | bfd_map_over_sections (stdoutput, write_relocs, (char *) 0); |
2213 | ||
f1c2d4af | 2214 | #ifdef tc_frob_file_after_relocs |
252b5132 RH |
2215 | tc_frob_file_after_relocs (); |
2216 | #endif | |
2217 | #ifdef obj_frob_file_after_relocs | |
2218 | obj_frob_file_after_relocs (); | |
2219 | #endif | |
f1c2d4af | 2220 | |
b8871f35 L |
2221 | #if defined OBJ_ELF || defined OBJ_MAYBE_ELF |
2222 | if (IS_ELF && flag_use_elf_stt_common) | |
2223 | stdoutput->flags |= BFD_CONVERT_ELF_COMMON | BFD_USE_ELF_STT_COMMON; | |
2224 | #endif | |
2225 | ||
0acf065b CC |
2226 | /* Once all relocations have been written, we can compress the |
2227 | contents of the debug sections. This needs to be done before | |
2228 | we start writing any sections, because it will affect the file | |
2229 | layout, which is fixed once we start writing contents. */ | |
2230 | if (flag_compress_debug) | |
8ecb73dd L |
2231 | { |
2232 | if (flag_compress_debug == COMPRESS_DEBUG_GABI_ZLIB) | |
2233 | stdoutput->flags |= BFD_COMPRESS | BFD_COMPRESS_GABI; | |
2234 | else | |
2235 | stdoutput->flags |= BFD_COMPRESS; | |
2236 | bfd_map_over_sections (stdoutput, compress_debug, (char *) 0); | |
2237 | } | |
0acf065b | 2238 | |
252b5132 | 2239 | bfd_map_over_sections (stdoutput, write_contents, (char *) 0); |
252b5132 | 2240 | } |
252b5132 RH |
2241 | |
2242 | #ifdef TC_GENERIC_RELAX_TABLE | |
252b5132 RH |
2243 | /* Relax a fragment by scanning TC_GENERIC_RELAX_TABLE. */ |
2244 | ||
2245 | long | |
d7342424 | 2246 | relax_frag (segT segment, fragS *fragP, long stretch) |
252b5132 RH |
2247 | { |
2248 | const relax_typeS *this_type; | |
2249 | const relax_typeS *start_type; | |
2250 | relax_substateT next_state; | |
2251 | relax_substateT this_state; | |
685736be | 2252 | offsetT growth; |
38686296 AM |
2253 | offsetT aim; |
2254 | addressT target; | |
2255 | addressT address; | |
2256 | symbolS *symbolP; | |
2257 | const relax_typeS *table; | |
2258 | ||
2259 | target = fragP->fr_offset; | |
2260 | address = fragP->fr_address; | |
2261 | table = TC_GENERIC_RELAX_TABLE; | |
252b5132 RH |
2262 | this_state = fragP->fr_subtype; |
2263 | start_type = this_type = table + this_state; | |
38686296 | 2264 | symbolP = fragP->fr_symbol; |
252b5132 RH |
2265 | |
2266 | if (symbolP) | |
2267 | { | |
c842b53a ILT |
2268 | fragS *sym_frag; |
2269 | ||
2270 | sym_frag = symbol_get_frag (symbolP); | |
2271 | ||
252b5132 | 2272 | #ifndef DIFF_EXPR_OK |
c842b53a | 2273 | know (sym_frag != NULL); |
252b5132 | 2274 | #endif |
a161fe53 | 2275 | know (S_GET_SEGMENT (symbolP) != absolute_section |
c842b53a | 2276 | || sym_frag == &zero_address_frag); |
ac62c346 | 2277 | target += S_GET_VALUE (symbolP); |
252b5132 | 2278 | |
e35a414d AM |
2279 | /* If SYM_FRAG has yet to be reached on this pass, assume it |
2280 | will move by STRETCH just as we did, unless there is an | |
2281 | alignment frag between here and SYM_FRAG. An alignment may | |
2282 | well absorb any STRETCH, and we don't want to choose a larger | |
2283 | branch insn by overestimating the needed reach of this | |
2284 | branch. It isn't critical to calculate TARGET exactly; We | |
2285 | know we'll be doing another pass if STRETCH is non-zero. */ | |
252b5132 | 2286 | |
c842b53a | 2287 | if (stretch != 0 |
38686296 AM |
2288 | && sym_frag->relax_marker != fragP->relax_marker |
2289 | && S_GET_SEGMENT (symbolP) == segment) | |
252b5132 | 2290 | { |
e35a414d AM |
2291 | if (stretch < 0 |
2292 | || sym_frag->region == fragP->region) | |
2293 | target += stretch; | |
e5940dff AM |
2294 | /* If we get here we know we have a forward branch. This |
2295 | relax pass may have stretched previous instructions so | |
2296 | far that omitting STRETCH would make the branch | |
2297 | negative. Don't allow this in case the negative reach is | |
2298 | large enough to require a larger branch instruction. */ | |
2299 | else if (target < address) | |
2300 | target = fragP->fr_next->fr_address + stretch; | |
252b5132 RH |
2301 | } |
2302 | } | |
2303 | ||
2304 | aim = target - address - fragP->fr_fix; | |
2305 | #ifdef TC_PCREL_ADJUST | |
efaf0ba4 NC |
2306 | /* Currently only the ns32k family needs this. */ |
2307 | aim += TC_PCREL_ADJUST (fragP); | |
efaf0ba4 | 2308 | #endif |
59c871b4 BE |
2309 | |
2310 | #ifdef md_prepare_relax_scan | |
2311 | /* Formerly called M68K_AIM_KLUDGE. */ | |
252b5132 RH |
2312 | md_prepare_relax_scan (fragP, address, aim, this_state, this_type); |
2313 | #endif | |
2314 | ||
2315 | if (aim < 0) | |
2316 | { | |
efaf0ba4 | 2317 | /* Look backwards. */ |
252b5132 RH |
2318 | for (next_state = this_type->rlx_more; next_state;) |
2319 | if (aim >= this_type->rlx_backward) | |
2320 | next_state = 0; | |
2321 | else | |
2322 | { | |
efaf0ba4 | 2323 | /* Grow to next state. */ |
252b5132 RH |
2324 | this_state = next_state; |
2325 | this_type = table + this_state; | |
2326 | next_state = this_type->rlx_more; | |
2327 | } | |
2328 | } | |
2329 | else | |
2330 | { | |
efaf0ba4 | 2331 | /* Look forwards. */ |
252b5132 RH |
2332 | for (next_state = this_type->rlx_more; next_state;) |
2333 | if (aim <= this_type->rlx_forward) | |
2334 | next_state = 0; | |
2335 | else | |
2336 | { | |
efaf0ba4 | 2337 | /* Grow to next state. */ |
252b5132 RH |
2338 | this_state = next_state; |
2339 | this_type = table + this_state; | |
2340 | next_state = this_type->rlx_more; | |
2341 | } | |
2342 | } | |
2343 | ||
2344 | growth = this_type->rlx_length - start_type->rlx_length; | |
2345 | if (growth != 0) | |
2346 | fragP->fr_subtype = this_state; | |
2347 | return growth; | |
2348 | } | |
2349 | ||
efaf0ba4 | 2350 | #endif /* defined (TC_GENERIC_RELAX_TABLE) */ |
252b5132 RH |
2351 | |
2352 | /* Relax_align. Advance location counter to next address that has 'alignment' | |
2353 | lowest order bits all 0s, return size of adjustment made. */ | |
2354 | static relax_addressT | |
ed9e98c2 AM |
2355 | relax_align (relax_addressT address, /* Address now. */ |
2356 | int alignment /* Alignment (binary). */) | |
252b5132 RH |
2357 | { |
2358 | relax_addressT mask; | |
2359 | relax_addressT new_address; | |
2360 | ||
65879393 | 2361 | mask = ~((relax_addressT) ~0 << alignment); |
252b5132 RH |
2362 | new_address = (address + mask) & (~mask); |
2363 | #ifdef LINKER_RELAXING_SHRINKS_ONLY | |
2364 | if (linkrelax) | |
2365 | /* We must provide lots of padding, so the linker can discard it | |
2366 | when needed. The linker will not add extra space, ever. */ | |
2367 | new_address += (1 << alignment); | |
2368 | #endif | |
2369 | return (new_address - address); | |
2370 | } | |
2371 | ||
efaf0ba4 NC |
2372 | /* Now we have a segment, not a crowd of sub-segments, we can make |
2373 | fr_address values. | |
58a77e41 | 2374 | |
efaf0ba4 | 2375 | Relax the frags. |
58a77e41 | 2376 | |
efaf0ba4 NC |
2377 | After this, all frags in this segment have addresses that are correct |
2378 | within the segment. Since segments live in different file addresses, | |
2379 | these frag addresses may not be the same as final object-file | |
2380 | addresses. */ | |
2381 | ||
e46d99eb | 2382 | int |
32638454 | 2383 | relax_segment (struct frag *segment_frag_root, segT segment, int pass) |
252b5132 | 2384 | { |
4111faa5 NC |
2385 | unsigned long frag_count; |
2386 | struct frag *fragP; | |
2387 | relax_addressT address; | |
e35a414d | 2388 | int region; |
e46d99eb AM |
2389 | int ret; |
2390 | ||
efaf0ba4 | 2391 | /* In case md_estimate_size_before_relax() wants to make fixSs. */ |
252b5132 RH |
2392 | subseg_change (segment, 0); |
2393 | ||
2394 | /* For each frag in segment: count and store (a 1st guess of) | |
2395 | fr_address. */ | |
2396 | address = 0; | |
e35a414d | 2397 | region = 0; |
4111faa5 NC |
2398 | for (frag_count = 0, fragP = segment_frag_root; |
2399 | fragP; | |
2400 | fragP = fragP->fr_next, frag_count ++) | |
252b5132 | 2401 | { |
e35a414d | 2402 | fragP->region = region; |
38686296 | 2403 | fragP->relax_marker = 0; |
252b5132 RH |
2404 | fragP->fr_address = address; |
2405 | address += fragP->fr_fix; | |
2406 | ||
2407 | switch (fragP->fr_type) | |
2408 | { | |
2409 | case rs_fill: | |
2410 | address += fragP->fr_offset * fragP->fr_var; | |
2411 | break; | |
2412 | ||
2413 | case rs_align: | |
2414 | case rs_align_code: | |
0a9ef439 | 2415 | case rs_align_test: |
252b5132 RH |
2416 | { |
2417 | addressT offset = relax_align (address, (int) fragP->fr_offset); | |
2418 | ||
2419 | if (fragP->fr_subtype != 0 && offset > fragP->fr_subtype) | |
2420 | offset = 0; | |
2421 | ||
2422 | if (offset % fragP->fr_var != 0) | |
2423 | { | |
54d3cad9 AM |
2424 | as_bad_where (fragP->fr_file, fragP->fr_line, |
2425 | _("alignment padding (%lu bytes) not a multiple of %ld"), | |
2426 | (unsigned long) offset, (long) fragP->fr_var); | |
252b5132 RH |
2427 | offset -= (offset % fragP->fr_var); |
2428 | } | |
2429 | ||
2430 | address += offset; | |
e35a414d | 2431 | region += 1; |
252b5132 RH |
2432 | } |
2433 | break; | |
2434 | ||
2435 | case rs_org: | |
252b5132 | 2436 | /* Assume .org is nugatory. It will grow with 1st relax. */ |
e35a414d AM |
2437 | region += 1; |
2438 | break; | |
2439 | ||
2440 | case rs_space: | |
252b5132 RH |
2441 | break; |
2442 | ||
2443 | case rs_machine_dependent: | |
e0890092 AM |
2444 | /* If fr_symbol is an expression, this call to |
2445 | resolve_symbol_value sets up the correct segment, which will | |
2446 | likely be needed in md_estimate_size_before_relax. */ | |
2447 | if (fragP->fr_symbol) | |
2448 | resolve_symbol_value (fragP->fr_symbol); | |
2449 | ||
252b5132 RH |
2450 | address += md_estimate_size_before_relax (fragP, segment); |
2451 | break; | |
2452 | ||
2453 | #ifndef WORKING_DOT_WORD | |
efaf0ba4 | 2454 | /* Broken words don't concern us yet. */ |
252b5132 RH |
2455 | case rs_broken_word: |
2456 | break; | |
2457 | #endif | |
2458 | ||
2459 | case rs_leb128: | |
efaf0ba4 | 2460 | /* Initial guess is always 1; doing otherwise can result in |
252b5132 RH |
2461 | stable solutions that are larger than the minimum. */ |
2462 | address += fragP->fr_offset = 1; | |
2463 | break; | |
2464 | ||
2465 | case rs_cfa: | |
2466 | address += eh_frame_estimate_size_before_relax (fragP); | |
2467 | break; | |
2468 | ||
220e750f RH |
2469 | case rs_dwarf2dbg: |
2470 | address += dwarf2dbg_estimate_size_before_relax (fragP); | |
2471 | break; | |
2472 | ||
252b5132 RH |
2473 | default: |
2474 | BAD_CASE (fragP->fr_type); | |
2475 | break; | |
efaf0ba4 NC |
2476 | } |
2477 | } | |
252b5132 RH |
2478 | |
2479 | /* Do relax(). */ | |
2480 | { | |
4111faa5 | 2481 | unsigned long max_iterations; |
d1c5f158 AM |
2482 | |
2483 | /* Cumulative address adjustment. */ | |
2484 | offsetT stretch; | |
2485 | ||
2486 | /* Have we made any adjustment this pass? We can't just test | |
2487 | stretch because one piece of code may have grown and another | |
2488 | shrank. */ | |
2489 | int stretched; | |
2490 | ||
2491 | /* Most horrible, but gcc may give us some exception data that | |
2492 | is impossible to assemble, of the form | |
2493 | ||
2494 | .align 4 | |
2495 | .byte 0, 0 | |
2496 | .uleb128 end - start | |
2497 | start: | |
2498 | .space 128*128 - 1 | |
2499 | .align 4 | |
2500 | end: | |
2501 | ||
2502 | If the leb128 is two bytes in size, then end-start is 128*128, | |
2503 | which requires a three byte leb128. If the leb128 is three | |
2504 | bytes in size, then end-start is 128*128-1, which requires a | |
2505 | two byte leb128. We work around this dilemma by inserting | |
2506 | an extra 4 bytes of alignment just after the .align. This | |
2507 | works because the data after the align is accessed relative to | |
2508 | the end label. | |
2509 | ||
2510 | This counter is used in a tiny state machine to detect | |
2511 | whether a leb128 followed by an align is impossible to | |
2512 | relax. */ | |
2513 | int rs_leb128_fudge = 0; | |
252b5132 | 2514 | |
4111faa5 NC |
2515 | /* We want to prevent going into an infinite loop where one frag grows |
2516 | depending upon the location of a symbol which is in turn moved by | |
2517 | the growing frag. eg: | |
2518 | ||
b4b24b79 AM |
2519 | foo = . |
2520 | .org foo+16 | |
2521 | foo = . | |
4111faa5 | 2522 | |
b4b24b79 | 2523 | So we dictate that this algorithm can be at most O2. */ |
4111faa5 NC |
2524 | max_iterations = frag_count * frag_count; |
2525 | /* Check for overflow. */ | |
2526 | if (max_iterations < frag_count) | |
2527 | max_iterations = frag_count; | |
2528 | ||
32638454 | 2529 | ret = 0; |
252b5132 RH |
2530 | do |
2531 | { | |
e46d99eb AM |
2532 | stretch = 0; |
2533 | stretched = 0; | |
58a77e41 | 2534 | |
252b5132 RH |
2535 | for (fragP = segment_frag_root; fragP; fragP = fragP->fr_next) |
2536 | { | |
685736be | 2537 | offsetT growth = 0; |
252b5132 RH |
2538 | addressT was_address; |
2539 | offsetT offset; | |
2540 | symbolS *symbolP; | |
2541 | ||
38686296 | 2542 | fragP->relax_marker ^= 1; |
252b5132 RH |
2543 | was_address = fragP->fr_address; |
2544 | address = fragP->fr_address += stretch; | |
2545 | symbolP = fragP->fr_symbol; | |
2546 | offset = fragP->fr_offset; | |
2547 | ||
2548 | switch (fragP->fr_type) | |
2549 | { | |
efaf0ba4 | 2550 | case rs_fill: /* .fill never relaxes. */ |
252b5132 RH |
2551 | growth = 0; |
2552 | break; | |
2553 | ||
2554 | #ifndef WORKING_DOT_WORD | |
2555 | /* JF: This is RMS's idea. I do *NOT* want to be blamed | |
2556 | for it I do not want to write it. I do not want to have | |
2557 | anything to do with it. This is not the proper way to | |
2558 | implement this misfeature. */ | |
2559 | case rs_broken_word: | |
2560 | { | |
2561 | struct broken_word *lie; | |
2562 | struct broken_word *untruth; | |
2563 | ||
2564 | /* Yes this is ugly (storing the broken_word pointer | |
2565 | in the symbol slot). Still, this whole chunk of | |
2566 | code is ugly, and I don't feel like doing anything | |
2567 | about it. Think of it as stubbornness in action. */ | |
2568 | growth = 0; | |
2569 | for (lie = (struct broken_word *) (fragP->fr_symbol); | |
2570 | lie && lie->dispfrag == fragP; | |
2571 | lie = lie->next_broken_word) | |
2572 | { | |
2573 | ||
2574 | if (lie->added) | |
2575 | continue; | |
2576 | ||
ac62c346 | 2577 | offset = (S_GET_VALUE (lie->add) |
252b5132 | 2578 | + lie->addnum |
ac62c346 | 2579 | - S_GET_VALUE (lie->sub)); |
252b5132 RH |
2580 | if (offset <= -32768 || offset >= 32767) |
2581 | { | |
2582 | if (flag_warn_displacement) | |
2583 | { | |
2584 | char buf[50]; | |
2585 | sprint_value (buf, (addressT) lie->addnum); | |
54d3cad9 AM |
2586 | as_warn_where (fragP->fr_file, fragP->fr_line, |
2587 | _(".word %s-%s+%s didn't fit"), | |
2588 | S_GET_NAME (lie->add), | |
2589 | S_GET_NAME (lie->sub), | |
2590 | buf); | |
252b5132 | 2591 | } |
252b5132 RH |
2592 | if (fragP->fr_subtype == 0) |
2593 | { | |
2594 | fragP->fr_subtype++; | |
2595 | growth += md_short_jump_size; | |
2596 | } | |
187af7df HPN |
2597 | |
2598 | /* Redirect *all* words of this table with the same | |
2599 | target, lest we have to handle the case where the | |
2600 | same target but with a offset that fits on this | |
2601 | round overflows at the next relaxation round. */ | |
2602 | for (untruth = (struct broken_word *) (fragP->fr_symbol); | |
252b5132 RH |
2603 | untruth && untruth->dispfrag == lie->dispfrag; |
2604 | untruth = untruth->next_broken_word) | |
49309057 ILT |
2605 | if ((symbol_get_frag (untruth->add) |
2606 | == symbol_get_frag (lie->add)) | |
2607 | && (S_GET_VALUE (untruth->add) | |
2608 | == S_GET_VALUE (lie->add))) | |
252b5132 RH |
2609 | { |
2610 | untruth->added = 2; | |
2611 | untruth->use_jump = lie; | |
2612 | } | |
187af7df HPN |
2613 | |
2614 | lie->added = 1; | |
252b5132 RH |
2615 | growth += md_long_jump_size; |
2616 | } | |
2617 | } | |
2618 | ||
2619 | break; | |
efaf0ba4 | 2620 | } /* case rs_broken_word */ |
252b5132 RH |
2621 | #endif |
2622 | case rs_align: | |
2623 | case rs_align_code: | |
0a9ef439 | 2624 | case rs_align_test: |
252b5132 RH |
2625 | { |
2626 | addressT oldoff, newoff; | |
2627 | ||
2628 | oldoff = relax_align (was_address + fragP->fr_fix, | |
2629 | (int) offset); | |
2630 | newoff = relax_align (address + fragP->fr_fix, | |
2631 | (int) offset); | |
2632 | ||
2633 | if (fragP->fr_subtype != 0) | |
2634 | { | |
2635 | if (oldoff > fragP->fr_subtype) | |
2636 | oldoff = 0; | |
2637 | if (newoff > fragP->fr_subtype) | |
2638 | newoff = 0; | |
2639 | } | |
2640 | ||
2641 | growth = newoff - oldoff; | |
d1c5f158 AM |
2642 | |
2643 | /* If this align happens to follow a leb128 and | |
2644 | we have determined that the leb128 is bouncing | |
2645 | in size, then break the cycle by inserting an | |
2646 | extra alignment. */ | |
2647 | if (growth < 0 | |
2648 | && (rs_leb128_fudge & 16) != 0 | |
2649 | && (rs_leb128_fudge & 15) >= 2) | |
2650 | { | |
2651 | segment_info_type *seginfo = seg_info (segment); | |
2652 | struct obstack *ob = &seginfo->frchainP->frch_obstack; | |
2653 | struct frag *newf; | |
2654 | ||
2655 | newf = frag_alloc (ob); | |
2656 | obstack_blank_fast (ob, fragP->fr_var); | |
2657 | obstack_finish (ob); | |
2658 | memcpy (newf, fragP, SIZEOF_STRUCT_FRAG); | |
2659 | memcpy (newf->fr_literal, | |
2660 | fragP->fr_literal + fragP->fr_fix, | |
2661 | fragP->fr_var); | |
2662 | newf->fr_type = rs_fill; | |
20f5cfbd | 2663 | newf->fr_address = address + fragP->fr_fix + newoff; |
d1c5f158 AM |
2664 | newf->fr_fix = 0; |
2665 | newf->fr_offset = (((offsetT) 1 << fragP->fr_offset) | |
2666 | / fragP->fr_var); | |
2667 | if (newf->fr_offset * newf->fr_var | |
2668 | != (offsetT) 1 << fragP->fr_offset) | |
2669 | { | |
2670 | newf->fr_offset = (offsetT) 1 << fragP->fr_offset; | |
2671 | newf->fr_var = 1; | |
2672 | } | |
20f5cfbd | 2673 | /* Include size of new frag in GROWTH. */ |
d1c5f158 | 2674 | growth += newf->fr_offset * newf->fr_var; |
20f5cfbd AM |
2675 | /* Adjust the new frag address for the amount |
2676 | we'll add when we process the new frag. */ | |
2677 | newf->fr_address -= stretch + growth; | |
d1c5f158 AM |
2678 | newf->relax_marker ^= 1; |
2679 | fragP->fr_next = newf; | |
2680 | #ifdef DEBUG | |
2681 | as_warn (_("padding added")); | |
2682 | #endif | |
2683 | } | |
252b5132 RH |
2684 | } |
2685 | break; | |
2686 | ||
2687 | case rs_org: | |
2688 | { | |
e46d99eb AM |
2689 | addressT target = offset; |
2690 | addressT after; | |
252b5132 RH |
2691 | |
2692 | if (symbolP) | |
2693 | { | |
b4b24b79 AM |
2694 | /* Convert from an actual address to an octet offset |
2695 | into the section. Here it is assumed that the | |
2696 | section's VMA is zero, and can omit subtracting it | |
2697 | from the symbol's value to get the address offset. */ | |
2698 | know (S_GET_SEGMENT (symbolP)->vma == 0); | |
6e917903 | 2699 | target += S_GET_VALUE (symbolP) * OCTETS_PER_BYTE; |
ac62c346 | 2700 | } |
252b5132 RH |
2701 | |
2702 | know (fragP->fr_next); | |
6afe8e98 | 2703 | after = fragP->fr_next->fr_address + stretch; |
252b5132 | 2704 | growth = target - after; |
9875b365 MR |
2705 | |
2706 | /* Growth may be negative, but variable part of frag | |
2707 | cannot have fewer than 0 chars. That is, we can't | |
2708 | .org backwards. */ | |
2709 | if (address + fragP->fr_fix > target) | |
252b5132 | 2710 | { |
32638454 AM |
2711 | growth = 0; |
2712 | ||
2713 | /* Don't error on first few frag relax passes. | |
2714 | The symbol might be an expression involving | |
2715 | symbol values from other sections. If those | |
2716 | sections have not yet been processed their | |
2717 | frags will all have zero addresses, so we | |
2718 | will calculate incorrect values for them. The | |
2719 | number of passes we allow before giving an | |
2720 | error is somewhat arbitrary. It should be at | |
2721 | least one, with larger values requiring | |
2722 | increasingly contrived dependencies between | |
2723 | frags to trigger a false error. */ | |
2724 | if (pass < 2) | |
2725 | { | |
2726 | /* Force another pass. */ | |
2727 | ret = 1; | |
2728 | break; | |
2729 | } | |
2730 | ||
14ad458a | 2731 | as_bad_where (fragP->fr_file, fragP->fr_line, |
685736be | 2732 | _("attempt to move .org backwards")); |
14ad458a ILT |
2733 | |
2734 | /* We've issued an error message. Change the | |
b4b24b79 | 2735 | frag to avoid cascading errors. */ |
14ad458a ILT |
2736 | fragP->fr_type = rs_align; |
2737 | fragP->fr_subtype = 0; | |
2738 | fragP->fr_offset = 0; | |
6afe8e98 | 2739 | fragP->fr_fix = after - address; |
252b5132 | 2740 | } |
252b5132 | 2741 | } |
6afe8e98 | 2742 | break; |
252b5132 RH |
2743 | |
2744 | case rs_space: | |
54d3cad9 | 2745 | growth = 0; |
252b5132 RH |
2746 | if (symbolP) |
2747 | { | |
766c03c9 AM |
2748 | offsetT amount; |
2749 | ||
2750 | amount = S_GET_VALUE (symbolP); | |
9e40345d | 2751 | if (S_GET_SEGMENT (symbolP) != absolute_section |
252b5132 RH |
2752 | || S_IS_COMMON (symbolP) |
2753 | || ! S_IS_DEFINED (symbolP)) | |
252b5132 | 2754 | { |
54d3cad9 AM |
2755 | as_bad_where (fragP->fr_file, fragP->fr_line, |
2756 | _(".space specifies non-absolute value")); | |
2757 | /* Prevent repeat of this error message. */ | |
2758 | fragP->fr_symbol = 0; | |
2759 | } | |
2760 | else if (amount < 0) | |
2761 | { | |
32638454 AM |
2762 | /* Don't error on first few frag relax passes. |
2763 | See rs_org comment for a longer explanation. */ | |
2764 | if (pass < 2) | |
2765 | { | |
2766 | ret = 1; | |
2767 | break; | |
2768 | } | |
2769 | ||
54d3cad9 AM |
2770 | as_warn_where (fragP->fr_file, fragP->fr_line, |
2771 | _(".space or .fill with negative value, ignored")); | |
766c03c9 | 2772 | fragP->fr_symbol = 0; |
252b5132 | 2773 | } |
54d3cad9 | 2774 | else |
050be34e | 2775 | growth = (was_address + fragP->fr_fix + amount |
54d3cad9 | 2776 | - fragP->fr_next->fr_address); |
252b5132 | 2777 | } |
252b5132 RH |
2778 | break; |
2779 | ||
2780 | case rs_machine_dependent: | |
2781 | #ifdef md_relax_frag | |
c842b53a | 2782 | growth = md_relax_frag (segment, fragP, stretch); |
252b5132 RH |
2783 | #else |
2784 | #ifdef TC_GENERIC_RELAX_TABLE | |
2785 | /* The default way to relax a frag is to look through | |
2786 | TC_GENERIC_RELAX_TABLE. */ | |
c842b53a | 2787 | growth = relax_frag (segment, fragP, stretch); |
efaf0ba4 | 2788 | #endif /* TC_GENERIC_RELAX_TABLE */ |
252b5132 RH |
2789 | #endif |
2790 | break; | |
2791 | ||
2792 | case rs_leb128: | |
2793 | { | |
2794 | valueT value; | |
685736be | 2795 | offsetT size; |
252b5132 | 2796 | |
6386f3a7 | 2797 | value = resolve_symbol_value (fragP->fr_symbol); |
252b5132 RH |
2798 | size = sizeof_leb128 (value, fragP->fr_subtype); |
2799 | growth = size - fragP->fr_offset; | |
2800 | fragP->fr_offset = size; | |
2801 | } | |
2802 | break; | |
2803 | ||
2804 | case rs_cfa: | |
2805 | growth = eh_frame_relax_frag (fragP); | |
2806 | break; | |
2807 | ||
220e750f RH |
2808 | case rs_dwarf2dbg: |
2809 | growth = dwarf2dbg_relax_frag (fragP); | |
2810 | break; | |
2811 | ||
252b5132 RH |
2812 | default: |
2813 | BAD_CASE (fragP->fr_type); | |
2814 | break; | |
2815 | } | |
2816 | if (growth) | |
2817 | { | |
2818 | stretch += growth; | |
e46d99eb | 2819 | stretched = 1; |
d1c5f158 AM |
2820 | if (fragP->fr_type == rs_leb128) |
2821 | rs_leb128_fudge += 16; | |
2822 | else if (fragP->fr_type == rs_align | |
2823 | && (rs_leb128_fudge & 16) != 0 | |
2824 | && stretch == 0) | |
2825 | rs_leb128_fudge += 16; | |
2826 | else | |
2827 | rs_leb128_fudge = 0; | |
252b5132 | 2828 | } |
4111faa5 | 2829 | } |
d1c5f158 AM |
2830 | |
2831 | if (stretch == 0 | |
2832 | && (rs_leb128_fudge & 16) == 0 | |
2833 | && (rs_leb128_fudge & -16) != 0) | |
2834 | rs_leb128_fudge += 1; | |
2835 | else | |
2836 | rs_leb128_fudge = 0; | |
252b5132 | 2837 | } |
4111faa5 NC |
2838 | /* Until nothing further to relax. */ |
2839 | while (stretched && -- max_iterations); | |
2840 | ||
2841 | if (stretched) | |
2842 | as_fatal (_("Infinite loop encountered whilst attempting to compute the addresses of symbols in section %s"), | |
2843 | segment_name (segment)); | |
2844 | } | |
252b5132 | 2845 | |
e46d99eb AM |
2846 | for (fragP = segment_frag_root; fragP; fragP = fragP->fr_next) |
2847 | if (fragP->last_fr_address != fragP->fr_address) | |
2848 | { | |
2849 | fragP->last_fr_address = fragP->fr_address; | |
2850 | ret = 1; | |
2851 | } | |
2852 | return ret; | |
efaf0ba4 | 2853 | } |
252b5132 | 2854 | |
252b5132 | 2855 | void |
d7342424 | 2856 | number_to_chars_bigendian (char *buf, valueT val, int n) |
252b5132 | 2857 | { |
937149dd | 2858 | if (n <= 0) |
252b5132 RH |
2859 | abort (); |
2860 | while (n--) | |
2861 | { | |
2862 | buf[n] = val & 0xff; | |
2863 | val >>= 8; | |
2864 | } | |
2865 | } | |
2866 | ||
2867 | void | |
d7342424 | 2868 | number_to_chars_littleendian (char *buf, valueT val, int n) |
252b5132 | 2869 | { |
937149dd | 2870 | if (n <= 0) |
252b5132 RH |
2871 | abort (); |
2872 | while (n--) | |
2873 | { | |
2874 | *buf++ = val & 0xff; | |
2875 | val >>= 8; | |
2876 | } | |
2877 | } | |
2878 | ||
2879 | void | |
d7342424 | 2880 | write_print_statistics (FILE *file) |
252b5132 | 2881 | { |
6d4d30bb | 2882 | fprintf (file, "fixups: %d\n", n_fixups); |
252b5132 RH |
2883 | } |
2884 | ||
efaf0ba4 | 2885 | /* For debugging. */ |
252b5132 RH |
2886 | extern int indent_level; |
2887 | ||
2888 | void | |
d7342424 | 2889 | print_fixup (fixS *fixp) |
252b5132 RH |
2890 | { |
2891 | indent_level = 1; | |
d2df793a NC |
2892 | fprintf (stderr, "fix "); |
2893 | fprintf_vma (stderr, (bfd_vma)((bfd_hostptr_t) fixp)); | |
2894 | fprintf (stderr, " %s:%d",fixp->fx_file, fixp->fx_line); | |
252b5132 RH |
2895 | if (fixp->fx_pcrel) |
2896 | fprintf (stderr, " pcrel"); | |
2897 | if (fixp->fx_pcrel_adjust) | |
2898 | fprintf (stderr, " pcrel_adjust=%d", fixp->fx_pcrel_adjust); | |
2899 | if (fixp->fx_im_disp) | |
2900 | { | |
2901 | #ifdef TC_NS32K | |
2902 | fprintf (stderr, " im_disp=%d", fixp->fx_im_disp); | |
2903 | #else | |
2904 | fprintf (stderr, " im_disp"); | |
2905 | #endif | |
2906 | } | |
2907 | if (fixp->fx_tcbit) | |
2908 | fprintf (stderr, " tcbit"); | |
2909 | if (fixp->fx_done) | |
2910 | fprintf (stderr, " done"); | |
d2df793a NC |
2911 | fprintf (stderr, "\n size=%d frag=", fixp->fx_size); |
2912 | fprintf_vma (stderr, (bfd_vma) ((bfd_hostptr_t) fixp->fx_frag)); | |
2913 | fprintf (stderr, " where=%ld offset=%lx addnumber=%lx", | |
2914 | (long) fixp->fx_where, | |
0af1713e AM |
2915 | (unsigned long) fixp->fx_offset, |
2916 | (unsigned long) fixp->fx_addnumber); | |
252b5132 RH |
2917 | fprintf (stderr, "\n %s (%d)", bfd_get_reloc_code_name (fixp->fx_r_type), |
2918 | fixp->fx_r_type); | |
252b5132 RH |
2919 | if (fixp->fx_addsy) |
2920 | { | |
2921 | fprintf (stderr, "\n +<"); | |
2922 | print_symbol_value_1 (stderr, fixp->fx_addsy); | |
2923 | fprintf (stderr, ">"); | |
2924 | } | |
2925 | if (fixp->fx_subsy) | |
2926 | { | |
2927 | fprintf (stderr, "\n -<"); | |
2928 | print_symbol_value_1 (stderr, fixp->fx_subsy); | |
2929 | fprintf (stderr, ">"); | |
2930 | } | |
2931 | fprintf (stderr, "\n"); | |
2932 | #ifdef TC_FIX_DATA_PRINT | |
2933 | TC_FIX_DATA_PRINT (stderr, fixp); | |
2934 | #endif | |
2935 | } |