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 | } | |
2578f2f3 | 727 | else if (sym != NULL && sec != 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, | |
992a06ee AM |
1109 | ngettext ("value of %s too large for field " |
1110 | "of %d byte at %s", | |
1111 | "value of %s too large for field " | |
1112 | "of %d bytes at %s", | |
1113 | fixP->fx_size), | |
e7ff5c73 AM |
1114 | buf2, fixP->fx_size, buf); |
1115 | } /* Generic error checking. */ | |
1116 | } | |
1117 | #ifdef WARN_SIGNED_OVERFLOW_WORD | |
1118 | /* Warn if a .word value is too large when treated as a signed | |
1119 | number. We already know it is not too negative. This is to | |
1120 | catch over-large switches generated by gcc on the 68k. */ | |
1121 | if (!flag_signed_overflow_ok | |
1122 | && fixP->fx_size == 2 | |
1123 | && add_number > 0x7fff) | |
1124 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
1125 | _("signed .word overflow; switch may be too large; %ld at 0x%lx"), | |
1126 | (long) add_number, | |
1127 | (long) (fragP->fr_address + fixP->fx_where)); | |
1128 | #endif | |
1129 | } /* Not a bit fix. */ | |
1130 | ||
1131 | #ifdef TC_VALIDATE_FIX | |
1132 | skip: ATTRIBUTE_UNUSED_LABEL | |
1133 | ; | |
1134 | #endif | |
1135 | #ifdef DEBUG5 | |
1136 | fprintf (stderr, "result:\n"); | |
1137 | print_fixup (fixP); | |
1138 | #endif | |
1139 | } /* For each fixS in this segment. */ | |
e7ff5c73 AM |
1140 | } |
1141 | ||
a161fe53 | 1142 | static void |
d7342424 KH |
1143 | fix_segment (bfd *abfd ATTRIBUTE_UNUSED, |
1144 | asection *sec, | |
e7ff5c73 | 1145 | void *xxx ATTRIBUTE_UNUSED) |
a161fe53 AM |
1146 | { |
1147 | segment_info_type *seginfo = seg_info (sec); | |
1148 | ||
1149 | fixup_segment (seginfo->fix_root, sec); | |
1150 | } | |
1151 | ||
e5435dec AM |
1152 | static void |
1153 | install_reloc (asection *sec, arelent *reloc, fragS *fragp, | |
3b4dbbbf | 1154 | const char *file, unsigned int line) |
e5435dec AM |
1155 | { |
1156 | char *err; | |
1157 | bfd_reloc_status_type s; | |
76d12939 AM |
1158 | asymbol *sym; |
1159 | ||
1160 | if (reloc->sym_ptr_ptr != NULL | |
1161 | && (sym = *reloc->sym_ptr_ptr) != NULL | |
1162 | && (sym->flags & BSF_KEEP) == 0 | |
1163 | && ((sym->flags & BSF_SECTION_SYM) == 0 | |
55f8b826 AM |
1164 | || (EMIT_SECTION_SYMBOLS |
1165 | && !bfd_is_abs_section (sym->section)))) | |
76d12939 | 1166 | as_bad_where (file, line, _("redefined symbol cannot be used on reloc")); |
e5435dec AM |
1167 | |
1168 | s = bfd_install_relocation (stdoutput, reloc, | |
1169 | fragp->fr_literal, fragp->fr_address, | |
1170 | sec, &err); | |
1171 | switch (s) | |
1172 | { | |
1173 | case bfd_reloc_ok: | |
1174 | break; | |
1175 | case bfd_reloc_overflow: | |
1176 | as_bad_where (file, line, _("relocation overflow")); | |
1177 | break; | |
1178 | case bfd_reloc_outofrange: | |
1179 | as_bad_where (file, line, _("relocation out of range")); | |
1180 | break; | |
1181 | default: | |
1182 | as_fatal (_("%s:%u: bad return from bfd_install_relocation: %x"), | |
1183 | file, line, s); | |
1184 | } | |
1185 | } | |
1186 | ||
7230378d AM |
1187 | static fragS * |
1188 | get_frag_for_reloc (fragS *last_frag, | |
1189 | const segment_info_type *seginfo, | |
1190 | const struct reloc_list *r) | |
1191 | { | |
1192 | fragS *f; | |
34bca508 | 1193 | |
7230378d AM |
1194 | for (f = last_frag; f != NULL; f = f->fr_next) |
1195 | if (f->fr_address <= r->u.b.r.address | |
1196 | && r->u.b.r.address < f->fr_address + f->fr_fix) | |
1197 | return f; | |
1198 | ||
1199 | for (f = seginfo->frchainP->frch_root; f != NULL; f = f->fr_next) | |
1200 | if (f->fr_address <= r->u.b.r.address | |
1201 | && r->u.b.r.address < f->fr_address + f->fr_fix) | |
1202 | return f; | |
1203 | ||
740bdc67 AM |
1204 | for (f = seginfo->frchainP->frch_root; f != NULL; f = f->fr_next) |
1205 | if (f->fr_address <= r->u.b.r.address | |
1206 | && r->u.b.r.address <= f->fr_address + f->fr_fix) | |
1207 | return f; | |
1208 | ||
7230378d AM |
1209 | as_bad_where (r->file, r->line, |
1210 | _("reloc not within (fixed part of) section")); | |
1211 | return NULL; | |
1212 | } | |
1213 | ||
252b5132 | 1214 | static void |
e7ff5c73 | 1215 | write_relocs (bfd *abfd, asection *sec, void *xxx ATTRIBUTE_UNUSED) |
252b5132 RH |
1216 | { |
1217 | segment_info_type *seginfo = seg_info (sec); | |
252b5132 | 1218 | unsigned int n; |
05e9452c | 1219 | struct reloc_list *my_reloc_list, **rp, *r; |
252b5132 RH |
1220 | arelent **relocs; |
1221 | fixS *fixp; | |
7230378d | 1222 | fragS *last_frag; |
252b5132 RH |
1223 | |
1224 | /* If seginfo is NULL, we did not create this section; don't do | |
1225 | anything with it. */ | |
1226 | if (seginfo == NULL) | |
1227 | return; | |
1228 | ||
252b5132 RH |
1229 | n = 0; |
1230 | for (fixp = seginfo->fix_root; fixp; fixp = fixp->fx_next) | |
e5435dec AM |
1231 | if (!fixp->fx_done) |
1232 | n++; | |
1233 | ||
1234 | #ifdef RELOC_EXPANSION_POSSIBLE | |
1235 | n *= MAX_RELOC_EXPANSION; | |
1236 | #endif | |
252b5132 | 1237 | |
05e9452c AM |
1238 | /* Extract relocs for this section from reloc_list. */ |
1239 | rp = &reloc_list; | |
1240 | my_reloc_list = NULL; | |
1241 | while ((r = *rp) != NULL) | |
1242 | { | |
1243 | if (r->u.b.sec == sec) | |
1244 | { | |
1245 | *rp = r->next; | |
1246 | r->next = my_reloc_list; | |
1247 | my_reloc_list = r; | |
1248 | n++; | |
1249 | } | |
1250 | else | |
1251 | rp = &r->next; | |
1252 | } | |
1253 | ||
add39d23 | 1254 | relocs = XCNEWVEC (arelent *, n); |
252b5132 | 1255 | |
7230378d AM |
1256 | n = 0; |
1257 | r = my_reloc_list; | |
1258 | last_frag = NULL; | |
252b5132 RH |
1259 | for (fixp = seginfo->fix_root; fixp != (fixS *) NULL; fixp = fixp->fx_next) |
1260 | { | |
d31f0f6d AM |
1261 | int fx_size, slack; |
1262 | offsetT loc; | |
7230378d AM |
1263 | arelent **reloc; |
1264 | #ifndef RELOC_EXPANSION_POSSIBLE | |
1265 | arelent *rel; | |
1266 | ||
1267 | reloc = &rel; | |
1268 | #endif | |
252b5132 RH |
1269 | |
1270 | if (fixp->fx_done) | |
e5435dec | 1271 | continue; |
252b5132 | 1272 | |
d31f0f6d AM |
1273 | fx_size = fixp->fx_size; |
1274 | slack = TC_FX_SIZE_SLACK (fixp); | |
1275 | if (slack > 0) | |
1276 | fx_size = fx_size > slack ? fx_size - slack : 0; | |
1277 | loc = fixp->fx_where + fx_size; | |
e5435dec | 1278 | if (slack >= 0 && loc > fixp->fx_frag->fr_fix) |
d31f0f6d AM |
1279 | as_bad_where (fixp->fx_file, fixp->fx_line, |
1280 | _("internal error: fixup not contained within frag")); | |
252b5132 | 1281 | |
e5435dec | 1282 | #ifndef RELOC_EXPANSION_POSSIBLE |
7230378d | 1283 | *reloc = tc_gen_reloc (sec, fixp); |
e5435dec | 1284 | #else |
7230378d AM |
1285 | reloc = tc_gen_reloc (sec, fixp); |
1286 | #endif | |
252b5132 | 1287 | |
7230378d AM |
1288 | while (*reloc) |
1289 | { | |
1290 | while (r != NULL && r->u.b.r.address < (*reloc)->address) | |
1291 | { | |
1292 | fragS *f = get_frag_for_reloc (last_frag, seginfo, r); | |
1293 | if (f != NULL) | |
1294 | { | |
1295 | last_frag = f; | |
1296 | relocs[n++] = &r->u.b.r; | |
1297 | install_reloc (sec, &r->u.b.r, f, r->file, r->line); | |
1298 | } | |
1299 | r = r->next; | |
1300 | } | |
1301 | relocs[n++] = *reloc; | |
1302 | install_reloc (sec, *reloc, fixp->fx_frag, | |
1303 | fixp->fx_file, fixp->fx_line); | |
1304 | #ifndef RELOC_EXPANSION_POSSIBLE | |
1305 | break; | |
1306 | #else | |
1307 | reloc++; | |
e5435dec | 1308 | #endif |
7230378d AM |
1309 | } |
1310 | } | |
d31f0f6d | 1311 | |
7230378d AM |
1312 | while (r != NULL) |
1313 | { | |
1314 | fragS *f = get_frag_for_reloc (last_frag, seginfo, r); | |
1315 | if (f != NULL) | |
1316 | { | |
1317 | last_frag = f; | |
1318 | relocs[n++] = &r->u.b.r; | |
1319 | install_reloc (sec, &r->u.b.r, f, r->file, r->line); | |
1320 | } | |
1321 | r = r->next; | |
252b5132 | 1322 | } |
252b5132 RH |
1323 | |
1324 | #ifdef DEBUG4 | |
1325 | { | |
1596988d | 1326 | unsigned int k, j, nsyms; |
252b5132 RH |
1327 | asymbol **sympp; |
1328 | sympp = bfd_get_outsymbols (stdoutput); | |
1329 | nsyms = bfd_get_symcount (stdoutput); | |
1596988d TG |
1330 | for (k = 0; k < n; k++) |
1331 | if (((*relocs[k]->sym_ptr_ptr)->flags & BSF_SECTION_SYM) == 0) | |
252b5132 RH |
1332 | { |
1333 | for (j = 0; j < nsyms; j++) | |
1596988d | 1334 | if (sympp[j] == *relocs[k]->sym_ptr_ptr) |
252b5132 RH |
1335 | break; |
1336 | if (j == nsyms) | |
1337 | abort (); | |
1338 | } | |
1339 | } | |
1340 | #endif | |
1341 | ||
1342 | if (n) | |
e5435dec AM |
1343 | { |
1344 | flagword flags = bfd_get_section_flags (abfd, sec); | |
1345 | flags |= SEC_RELOC; | |
1346 | bfd_set_section_flags (abfd, sec, flags); | |
1347 | bfd_set_reloc (stdoutput, sec, relocs, n); | |
1348 | } | |
252b5132 | 1349 | |
945a1a6b ILT |
1350 | #ifdef SET_SECTION_RELOCS |
1351 | SET_SECTION_RELOCS (sec, relocs, n); | |
1352 | #endif | |
1353 | ||
252b5132 RH |
1354 | #ifdef DEBUG3 |
1355 | { | |
1596988d TG |
1356 | unsigned int k; |
1357 | ||
252b5132 | 1358 | fprintf (stderr, "relocs for sec %s\n", sec->name); |
1596988d | 1359 | for (k = 0; k < n; k++) |
252b5132 | 1360 | { |
1596988d TG |
1361 | arelent *rel = relocs[k]; |
1362 | asymbol *s = *rel->sym_ptr_ptr; | |
988392e2 | 1363 | fprintf (stderr, " reloc %2d @%p off %4lx : sym %-10s addend %lx\n", |
1596988d TG |
1364 | k, rel, (unsigned long)rel->address, s->name, |
1365 | (unsigned long)rel->addend); | |
252b5132 RH |
1366 | } |
1367 | } | |
1368 | #endif | |
1369 | } | |
1370 | ||
0acf065b CC |
1371 | static int |
1372 | compress_frag (struct z_stream_s *strm, const char *contents, int in_size, | |
1373 | fragS **last_newf, struct obstack *ob) | |
1374 | { | |
1375 | int out_size; | |
1376 | int total_out_size = 0; | |
1377 | fragS *f = *last_newf; | |
1378 | char *next_out; | |
1379 | int avail_out; | |
1380 | ||
1381 | /* Call the compression routine repeatedly until it has finished | |
1382 | processing the frag. */ | |
1383 | while (in_size > 0) | |
1384 | { | |
1385 | /* Reserve all the space available in the current chunk. | |
1386 | If none is available, start a new frag. */ | |
1387 | avail_out = obstack_room (ob); | |
1388 | if (avail_out <= 0) | |
1389 | { | |
1390 | obstack_finish (ob); | |
1391 | f = frag_alloc (ob); | |
1392 | f->fr_type = rs_fill; | |
1393 | (*last_newf)->fr_next = f; | |
1394 | *last_newf = f; | |
1395 | avail_out = obstack_room (ob); | |
1396 | } | |
1397 | if (avail_out <= 0) | |
1398 | as_fatal (_("can't extend frag")); | |
1399 | next_out = obstack_next_free (ob); | |
1400 | obstack_blank_fast (ob, avail_out); | |
1401 | out_size = compress_data (strm, &contents, &in_size, | |
1402 | &next_out, &avail_out); | |
1403 | if (out_size < 0) | |
1404 | return -1; | |
1405 | ||
1406 | f->fr_fix += out_size; | |
1407 | total_out_size += out_size; | |
1408 | ||
1409 | /* Return unused space. */ | |
1410 | if (avail_out > 0) | |
1411 | obstack_blank_fast (ob, -avail_out); | |
1412 | } | |
1413 | ||
1414 | return total_out_size; | |
1415 | } | |
1416 | ||
1417 | static void | |
1418 | compress_debug (bfd *abfd, asection *sec, void *xxx ATTRIBUTE_UNUSED) | |
1419 | { | |
1420 | segment_info_type *seginfo = seg_info (sec); | |
1421 | fragS *f; | |
1422 | fragS *first_newf; | |
1423 | fragS *last_newf; | |
1424 | struct obstack *ob = &seginfo->frchainP->frch_obstack; | |
1425 | bfd_size_type uncompressed_size = (bfd_size_type) sec->size; | |
1426 | bfd_size_type compressed_size; | |
1427 | const char *section_name; | |
1428 | char *compressed_name; | |
1429 | char *header; | |
1430 | struct z_stream_s *strm; | |
1431 | int x; | |
4a114e3e | 1432 | flagword flags = bfd_get_section_flags (abfd, sec); |
151411f8 | 1433 | unsigned int header_size, compression_header_size; |
0acf065b CC |
1434 | |
1435 | if (seginfo == NULL | |
6ac88ef3 | 1436 | || sec->size < 32 |
4a114e3e | 1437 | || (flags & (SEC_ALLOC | SEC_HAS_CONTENTS)) == SEC_ALLOC) |
0acf065b CC |
1438 | return; |
1439 | ||
1440 | section_name = bfd_get_section_name (stdoutput, sec); | |
1441 | if (strncmp (section_name, ".debug_", 7) != 0) | |
1442 | return; | |
1443 | ||
1444 | strm = compress_init (); | |
1445 | if (strm == NULL) | |
1446 | return; | |
1447 | ||
151411f8 | 1448 | if (flag_compress_debug == COMPRESS_DEBUG_GABI_ZLIB) |
dab394de | 1449 | { |
dab394de L |
1450 | compression_header_size |
1451 | = bfd_get_compression_header_size (stdoutput, NULL); | |
1452 | header_size = compression_header_size; | |
1453 | } | |
151411f8 | 1454 | else |
dab394de | 1455 | { |
dab394de L |
1456 | compression_header_size = 0; |
1457 | header_size = 12; | |
1458 | } | |
151411f8 | 1459 | |
dab394de | 1460 | /* Create a new frag to contain the compression header. */ |
0acf065b | 1461 | first_newf = frag_alloc (ob); |
151411f8 | 1462 | if (obstack_room (ob) < header_size) |
0acf065b | 1463 | first_newf = frag_alloc (ob); |
151411f8 | 1464 | if (obstack_room (ob) < header_size) |
992a06ee AM |
1465 | as_fatal (ngettext ("can't extend frag %lu char", |
1466 | "can't extend frag %lu chars", | |
1467 | (unsigned long) header_size), | |
1468 | (unsigned long) header_size); | |
0acf065b | 1469 | last_newf = first_newf; |
151411f8 | 1470 | obstack_blank_fast (ob, header_size); |
0acf065b | 1471 | last_newf->fr_type = rs_fill; |
151411f8 | 1472 | last_newf->fr_fix = header_size; |
0acf065b | 1473 | header = last_newf->fr_literal; |
151411f8 | 1474 | compressed_size = header_size; |
0acf065b CC |
1475 | |
1476 | /* Stream the frags through the compression engine, adding new frags | |
2b0f3761 | 1477 | as necessary to accommodate the compressed output. */ |
0acf065b CC |
1478 | for (f = seginfo->frchainP->frch_root; |
1479 | f; | |
1480 | f = f->fr_next) | |
1481 | { | |
1482 | offsetT fill_size; | |
1483 | char *fill_literal; | |
1484 | offsetT count; | |
1485 | int out_size; | |
1486 | ||
1487 | gas_assert (f->fr_type == rs_fill); | |
1488 | if (f->fr_fix) | |
1489 | { | |
1490 | out_size = compress_frag (strm, f->fr_literal, f->fr_fix, | |
1491 | &last_newf, ob); | |
1492 | if (out_size < 0) | |
1493 | return; | |
1494 | compressed_size += out_size; | |
1495 | } | |
1496 | fill_literal = f->fr_literal + f->fr_fix; | |
1497 | fill_size = f->fr_var; | |
1498 | count = f->fr_offset; | |
1499 | gas_assert (count >= 0); | |
1500 | if (fill_size && count) | |
1501 | { | |
1502 | while (count--) | |
1503 | { | |
1504 | out_size = compress_frag (strm, fill_literal, (int) fill_size, | |
1505 | &last_newf, ob); | |
1506 | if (out_size < 0) | |
1507 | return; | |
1508 | compressed_size += out_size; | |
1509 | } | |
1510 | } | |
1511 | } | |
1512 | ||
1513 | /* Flush the compression state. */ | |
1514 | for (;;) | |
1515 | { | |
1516 | int avail_out; | |
1517 | char *next_out; | |
1518 | int out_size; | |
1519 | ||
1520 | /* Reserve all the space available in the current chunk. | |
1521 | If none is available, start a new frag. */ | |
1522 | avail_out = obstack_room (ob); | |
1523 | if (avail_out <= 0) | |
1524 | { | |
1525 | fragS *newf; | |
1526 | ||
1527 | obstack_finish (ob); | |
1528 | newf = frag_alloc (ob); | |
1529 | newf->fr_type = rs_fill; | |
1530 | last_newf->fr_next = newf; | |
1531 | last_newf = newf; | |
1532 | avail_out = obstack_room (ob); | |
1533 | } | |
1534 | if (avail_out <= 0) | |
1535 | as_fatal (_("can't extend frag")); | |
1536 | next_out = obstack_next_free (ob); | |
1537 | obstack_blank_fast (ob, avail_out); | |
1538 | x = compress_finish (strm, &next_out, &avail_out, &out_size); | |
1539 | if (x < 0) | |
1540 | return; | |
1541 | ||
1542 | last_newf->fr_fix += out_size; | |
1543 | compressed_size += out_size; | |
1544 | ||
1545 | /* Return unused space. */ | |
1546 | if (avail_out > 0) | |
1547 | obstack_blank_fast (ob, -avail_out); | |
1548 | ||
1549 | if (x == 0) | |
1550 | break; | |
1551 | } | |
1552 | ||
b422eb49 L |
1553 | /* PR binutils/18087: If compression didn't make the section smaller, |
1554 | just keep it uncompressed. */ | |
317974f6 | 1555 | if (compressed_size >= uncompressed_size) |
273a4985 | 1556 | return; |
d94077e2 | 1557 | |
0acf065b CC |
1558 | /* Replace the uncompressed frag list with the compressed frag list. */ |
1559 | seginfo->frchainP->frch_root = first_newf; | |
1560 | seginfo->frchainP->frch_last = last_newf; | |
1561 | ||
1562 | /* Update the section size and its name. */ | |
151411f8 | 1563 | bfd_update_compression_header (abfd, (bfd_byte *) header, sec); |
0acf065b CC |
1564 | x = bfd_set_section_size (abfd, sec, compressed_size); |
1565 | gas_assert (x); | |
151411f8 L |
1566 | if (!compression_header_size) |
1567 | { | |
29a2809e | 1568 | compressed_name = concat (".z", section_name + 1, (char *) NULL); |
151411f8 L |
1569 | bfd_section_name (stdoutput, sec) = compressed_name; |
1570 | } | |
0acf065b CC |
1571 | } |
1572 | ||
252b5132 | 1573 | static void |
d7342424 KH |
1574 | write_contents (bfd *abfd ATTRIBUTE_UNUSED, |
1575 | asection *sec, | |
e7ff5c73 | 1576 | void *xxx ATTRIBUTE_UNUSED) |
252b5132 RH |
1577 | { |
1578 | segment_info_type *seginfo = seg_info (sec); | |
685736be | 1579 | addressT offset = 0; |
252b5132 RH |
1580 | fragS *f; |
1581 | ||
1582 | /* Write out the frags. */ | |
1583 | if (seginfo == NULL | |
efaf0ba4 | 1584 | || !(bfd_get_section_flags (abfd, sec) & SEC_HAS_CONTENTS)) |
252b5132 RH |
1585 | return; |
1586 | ||
1587 | for (f = seginfo->frchainP->frch_root; | |
1588 | f; | |
1589 | f = f->fr_next) | |
1590 | { | |
1591 | int x; | |
685736be | 1592 | addressT fill_size; |
252b5132 | 1593 | char *fill_literal; |
685736be | 1594 | offsetT count; |
252b5132 | 1595 | |
9c2799c2 | 1596 | gas_assert (f->fr_type == rs_fill); |
252b5132 RH |
1597 | if (f->fr_fix) |
1598 | { | |
1599 | x = bfd_set_section_contents (stdoutput, sec, | |
1600 | f->fr_literal, (file_ptr) offset, | |
1601 | (bfd_size_type) f->fr_fix); | |
b34976b6 | 1602 | if (!x) |
992a06ee AM |
1603 | as_fatal (ngettext ("can't write %ld byte " |
1604 | "to section %s of %s: '%s'", | |
1605 | "can't write %ld bytes " | |
1606 | "to section %s of %s: '%s'", | |
1607 | (long) f->fr_fix), | |
1608 | (long) f->fr_fix, | |
1609 | sec->name, stdoutput->filename, | |
885afe7b | 1610 | bfd_errmsg (bfd_get_error ())); |
252b5132 RH |
1611 | offset += f->fr_fix; |
1612 | } | |
1613 | fill_literal = f->fr_literal + f->fr_fix; | |
1614 | fill_size = f->fr_var; | |
1615 | count = f->fr_offset; | |
9c2799c2 | 1616 | gas_assert (count >= 0); |
252b5132 RH |
1617 | if (fill_size && count) |
1618 | { | |
1619 | char buf[256]; | |
efaf0ba4 | 1620 | if (fill_size > sizeof (buf)) |
252b5132 | 1621 | { |
efaf0ba4 | 1622 | /* Do it the old way. Can this ever happen? */ |
252b5132 RH |
1623 | while (count--) |
1624 | { | |
1625 | x = bfd_set_section_contents (stdoutput, sec, | |
1626 | fill_literal, | |
1627 | (file_ptr) offset, | |
1628 | (bfd_size_type) fill_size); | |
b34976b6 | 1629 | if (!x) |
992a06ee AM |
1630 | as_fatal (ngettext ("can't fill %ld byte " |
1631 | "in section %s of %s: '%s'", | |
1632 | "can't fill %ld bytes " | |
1633 | "in section %s of %s: '%s'", | |
1634 | (long) fill_size), | |
1635 | (long) fill_size, | |
1636 | sec->name, stdoutput->filename, | |
885afe7b | 1637 | bfd_errmsg (bfd_get_error ())); |
252b5132 RH |
1638 | offset += fill_size; |
1639 | } | |
1640 | } | |
1641 | else | |
1642 | { | |
1643 | /* Build a buffer full of fill objects and output it as | |
1644 | often as necessary. This saves on the overhead of | |
1645 | potentially lots of bfd_set_section_contents calls. */ | |
1646 | int n_per_buf, i; | |
1647 | if (fill_size == 1) | |
1648 | { | |
1649 | n_per_buf = sizeof (buf); | |
1650 | memset (buf, *fill_literal, n_per_buf); | |
1651 | } | |
1652 | else | |
1653 | { | |
1654 | char *bufp; | |
efaf0ba4 | 1655 | n_per_buf = sizeof (buf) / fill_size; |
252b5132 | 1656 | for (i = n_per_buf, bufp = buf; i; i--, bufp += fill_size) |
efaf0ba4 | 1657 | memcpy (bufp, fill_literal, fill_size); |
252b5132 RH |
1658 | } |
1659 | for (; count > 0; count -= n_per_buf) | |
1660 | { | |
1661 | n_per_buf = n_per_buf > count ? count : n_per_buf; | |
efaf0ba4 NC |
1662 | x = bfd_set_section_contents |
1663 | (stdoutput, sec, buf, (file_ptr) offset, | |
1664 | (bfd_size_type) n_per_buf * fill_size); | |
b34976b6 | 1665 | if (!x) |
992a06ee AM |
1666 | as_fatal (ngettext ("can't fill %ld byte " |
1667 | "in section %s of %s: '%s'", | |
1668 | "can't fill %ld bytes " | |
1669 | "in section %s of %s: '%s'", | |
1670 | (long) (n_per_buf * fill_size)), | |
1671 | (long) (n_per_buf * fill_size), | |
1672 | sec->name, stdoutput->filename, | |
a22429b9 | 1673 | bfd_errmsg (bfd_get_error ())); |
252b5132 RH |
1674 | offset += n_per_buf * fill_size; |
1675 | } | |
1676 | } | |
1677 | } | |
1678 | } | |
1679 | } | |
252b5132 | 1680 | |
252b5132 | 1681 | static void |
d7342424 | 1682 | merge_data_into_text (void) |
252b5132 | 1683 | { |
252b5132 RH |
1684 | seg_info (text_section)->frchainP->frch_last->fr_next = |
1685 | seg_info (data_section)->frchainP->frch_root; | |
1686 | seg_info (text_section)->frchainP->frch_last = | |
1687 | seg_info (data_section)->frchainP->frch_last; | |
1688 | seg_info (data_section)->frchainP = 0; | |
252b5132 | 1689 | } |
252b5132 | 1690 | |
252b5132 | 1691 | static void |
d7342424 | 1692 | set_symtab (void) |
252b5132 RH |
1693 | { |
1694 | int nsyms; | |
1695 | asymbol **asympp; | |
1696 | symbolS *symp; | |
b34976b6 | 1697 | bfd_boolean result; |
252b5132 RH |
1698 | |
1699 | /* Count symbols. We can't rely on a count made by the loop in | |
1700 | write_object_file, because *_frob_file may add a new symbol or | |
1701 | two. */ | |
1702 | nsyms = 0; | |
1703 | for (symp = symbol_rootP; symp; symp = symbol_next (symp)) | |
1704 | nsyms++; | |
1705 | ||
1706 | if (nsyms) | |
1707 | { | |
1708 | int i; | |
0e1a166b | 1709 | bfd_size_type amt = (bfd_size_type) nsyms * sizeof (asymbol *); |
252b5132 | 1710 | |
1e9cc1c2 | 1711 | asympp = (asymbol **) bfd_alloc (stdoutput, amt); |
252b5132 RH |
1712 | symp = symbol_rootP; |
1713 | for (i = 0; i < nsyms; i++, symp = symbol_next (symp)) | |
1714 | { | |
49309057 | 1715 | asympp[i] = symbol_get_bfdsym (symp); |
76d12939 AM |
1716 | if (asympp[i]->flags != BSF_SECTION_SYM |
1717 | || !(bfd_is_const_section (asympp[i]->section) | |
1718 | && asympp[i]->section->symbol == asympp[i])) | |
1719 | asympp[i]->flags |= BSF_KEEP; | |
49309057 | 1720 | symbol_mark_written (symp); |
252b5132 RH |
1721 | } |
1722 | } | |
1723 | else | |
1724 | asympp = 0; | |
1725 | result = bfd_set_symtab (stdoutput, asympp, nsyms); | |
9c2799c2 | 1726 | gas_assert (result); |
252b5132 RH |
1727 | symbol_table_frozen = 1; |
1728 | } | |
252b5132 RH |
1729 | |
1730 | /* Finish the subsegments. After every sub-segment, we fake an | |
2edb36e7 | 1731 | ".align ...". This conforms to BSD4.2 brain-damage. We then fake |
252b5132 RH |
1732 | ".fill 0" because that is the kind of frag that requires least |
1733 | thought. ".align" frags like to have a following frag since that | |
1734 | makes calculating their intended length trivial. */ | |
1735 | ||
1736 | #ifndef SUB_SEGMENT_ALIGN | |
18e1d487 | 1737 | #ifdef HANDLE_ALIGN |
436d9e46 | 1738 | /* The last subsegment gets an alignment corresponding to the alignment |
18e1d487 AM |
1739 | of the section. This allows proper nop-filling at the end of |
1740 | code-bearing sections. */ | |
1741 | #define SUB_SEGMENT_ALIGN(SEG, FRCHAIN) \ | |
9028d943 | 1742 | (!(FRCHAIN)->frch_next && subseg_text_p (SEG) \ |
2edb36e7 | 1743 | && !do_not_pad_sections_to_alignment \ |
9028d943 AM |
1744 | ? get_recorded_alignment (SEG) \ |
1745 | : 0) | |
18e1d487 | 1746 | #else |
18e1d487 | 1747 | #define SUB_SEGMENT_ALIGN(SEG, FRCHAIN) 0 |
252b5132 RH |
1748 | #endif |
1749 | #endif | |
1750 | ||
85024cd8 | 1751 | static void |
d98b0e2b | 1752 | subsegs_finish_section (asection *s) |
252b5132 RH |
1753 | { |
1754 | struct frchain *frchainP; | |
d98b0e2b TG |
1755 | segment_info_type *seginfo = seg_info (s); |
1756 | if (!seginfo) | |
1757 | return; | |
252b5132 | 1758 | |
d98b0e2b TG |
1759 | for (frchainP = seginfo->frchainP; |
1760 | frchainP != NULL; | |
1761 | frchainP = frchainP->frch_next) | |
252b5132 | 1762 | { |
93a24ba7 | 1763 | int alignment; |
0a9ef439 | 1764 | |
d98b0e2b | 1765 | subseg_set (s, frchainP->frch_subseg); |
381a1ab3 | 1766 | |
d98b0e2b TG |
1767 | /* This now gets called even if we had errors. In that case, |
1768 | any alignment is meaningless, and, moreover, will look weird | |
1769 | if we are generating a listing. */ | |
93a24ba7 MR |
1770 | if (had_errors ()) |
1771 | do_not_pad_sections_to_alignment = 1; | |
c9049d30 | 1772 | |
93a24ba7 MR |
1773 | alignment = SUB_SEGMENT_ALIGN (now_seg, frchainP); |
1774 | if ((bfd_get_section_flags (now_seg->owner, now_seg) & SEC_MERGE) | |
1775 | && now_seg->entsize) | |
1776 | { | |
1777 | unsigned int entsize = now_seg->entsize; | |
1778 | int entalign = 0; | |
d98b0e2b | 1779 | |
93a24ba7 MR |
1780 | while ((entsize & 1) == 0) |
1781 | { | |
1782 | ++entalign; | |
1783 | entsize >>= 1; | |
381a1ab3 | 1784 | } |
93a24ba7 MR |
1785 | |
1786 | if (entalign > alignment) | |
1787 | alignment = entalign; | |
d98b0e2b | 1788 | } |
0a9ef439 | 1789 | |
d98b0e2b TG |
1790 | if (subseg_text_p (now_seg)) |
1791 | frag_align_code (alignment, 0); | |
1792 | else | |
1793 | frag_align (alignment, 0, 0); | |
252b5132 | 1794 | |
d98b0e2b TG |
1795 | /* frag_align will have left a new frag. |
1796 | Use this last frag for an empty ".fill". | |
252b5132 | 1797 | |
d98b0e2b TG |
1798 | For this segment ... |
1799 | Create a last frag. Do not leave a "being filled in frag". */ | |
1800 | frag_wane (frag_now); | |
1801 | frag_now->fr_fix = 0; | |
1802 | know (frag_now->fr_next == NULL); | |
252b5132 RH |
1803 | } |
1804 | } | |
1805 | ||
d98b0e2b TG |
1806 | static void |
1807 | subsegs_finish (void) | |
1808 | { | |
1809 | asection *s; | |
1810 | ||
1811 | for (s = stdoutput->sections; s; s = s->next) | |
1812 | subsegs_finish_section (s); | |
1813 | } | |
1814 | ||
1815 | #ifdef OBJ_ELF | |
1816 | static void | |
1817 | create_obj_attrs_section (void) | |
1818 | { | |
1819 | segT s; | |
1820 | char *p; | |
1821 | offsetT size; | |
1822 | const char *name; | |
1823 | ||
1824 | size = bfd_elf_obj_attr_size (stdoutput); | |
1825 | if (size) | |
1826 | { | |
1827 | name = get_elf_backend_data (stdoutput)->obj_attrs_section; | |
1828 | if (!name) | |
1829 | name = ".gnu.attributes"; | |
1830 | s = subseg_new (name, 0); | |
1831 | elf_section_type (s) | |
1832 | = get_elf_backend_data (stdoutput)->obj_attrs_section_type; | |
1833 | bfd_set_section_flags (stdoutput, s, SEC_READONLY | SEC_DATA); | |
1834 | frag_now_fix (); | |
1835 | p = frag_more (size); | |
1836 | bfd_elf_set_obj_attr_contents (stdoutput, (bfd_byte *)p, size); | |
1837 | ||
1838 | subsegs_finish_section (s); | |
1839 | relax_segment (seg_info (s)->frchainP->frch_root, s, 0); | |
1840 | size_seg (stdoutput, s, NULL); | |
1841 | } | |
1842 | } | |
1843 | #endif | |
1844 | ||
252b5132 RH |
1845 | /* Write the object file. */ |
1846 | ||
1847 | void | |
d7342424 | 1848 | write_object_file (void) |
252b5132 | 1849 | { |
32638454 | 1850 | struct relax_seg_info rsi; |
7be1c489 | 1851 | #ifndef WORKING_DOT_WORD |
efaf0ba4 | 1852 | fragS *fragP; /* Track along all frags. */ |
252b5132 RH |
1853 | #endif |
1854 | ||
85024cd8 AM |
1855 | subsegs_finish (); |
1856 | ||
16a87420 IS |
1857 | #ifdef md_pre_output_hook |
1858 | md_pre_output_hook; | |
1859 | #endif | |
1860 | ||
cdaa5616 IS |
1861 | #ifdef md_pre_relax_hook |
1862 | md_pre_relax_hook; | |
1863 | #endif | |
1864 | ||
252b5132 | 1865 | /* From now on, we don't care about sub-segments. Build one frag chain |
2b0f3761 | 1866 | for each segment. Linked through fr_next. */ |
252b5132 | 1867 | |
252b5132 RH |
1868 | /* Remove the sections created by gas for its own purposes. */ |
1869 | { | |
252b5132 RH |
1870 | int i; |
1871 | ||
5daa8fe7 L |
1872 | bfd_section_list_remove (stdoutput, reg_section); |
1873 | bfd_section_list_remove (stdoutput, expr_section); | |
1874 | stdoutput->section_count -= 2; | |
252b5132 RH |
1875 | i = 0; |
1876 | bfd_map_over_sections (stdoutput, renumber_sections, &i); | |
1877 | } | |
1878 | ||
1879 | bfd_map_over_sections (stdoutput, chain_frchains_together, (char *) 0); | |
252b5132 RH |
1880 | |
1881 | /* We have two segments. If user gave -R flag, then we must put the | |
1882 | data frags into the text segment. Do this before relaxing so | |
1883 | we know to take advantage of -R and make shorter addresses. */ | |
252b5132 RH |
1884 | if (flag_readonly_data_in_text) |
1885 | { | |
1886 | merge_data_into_text (); | |
1887 | } | |
252b5132 | 1888 | |
32638454 | 1889 | rsi.pass = 0; |
e46d99eb AM |
1890 | while (1) |
1891 | { | |
aacb5251 HPN |
1892 | #ifndef WORKING_DOT_WORD |
1893 | /* We need to reset the markers in the broken word list and | |
1894 | associated frags between calls to relax_segment (via | |
1895 | relax_seg). Since the broken word list is global, we do it | |
1896 | once per round, rather than locally in relax_segment for each | |
1897 | segment. */ | |
1898 | struct broken_word *brokp; | |
1899 | ||
1900 | for (brokp = broken_words; | |
1901 | brokp != (struct broken_word *) NULL; | |
1902 | brokp = brokp->next_broken_word) | |
1903 | { | |
1904 | brokp->added = 0; | |
1905 | ||
1906 | if (brokp->dispfrag != (fragS *) NULL | |
1907 | && brokp->dispfrag->fr_type == rs_broken_word) | |
1908 | brokp->dispfrag->fr_subtype = 0; | |
1909 | } | |
1910 | #endif | |
1911 | ||
32638454 AM |
1912 | rsi.changed = 0; |
1913 | bfd_map_over_sections (stdoutput, relax_seg, &rsi); | |
1914 | rsi.pass++; | |
1915 | if (!rsi.changed) | |
e46d99eb AM |
1916 | break; |
1917 | } | |
e027f3e8 | 1918 | |
87548816 NC |
1919 | /* Note - Most ports will use the default value of |
1920 | TC_FINALIZE_SYMS_BEFORE_SIZE_SEG, which 1. This will force | |
1921 | local symbols to be resolved, removing their frag information. | |
1922 | Some ports however, will not have finished relaxing all of | |
1923 | their frags and will still need the local symbol frag | |
1924 | information. These ports can set | |
1925 | TC_FINALIZE_SYMS_BEFORE_SIZE_SEG to 0. */ | |
1926 | finalize_syms = TC_FINALIZE_SYMS_BEFORE_SIZE_SEG; | |
1927 | ||
e46d99eb | 1928 | bfd_map_over_sections (stdoutput, size_seg, (char *) 0); |
e46d99eb | 1929 | |
38b87a1b NC |
1930 | /* Relaxation has completed. Freeze all syms. */ |
1931 | finalize_syms = 1; | |
1932 | ||
ba8826a8 AO |
1933 | dwarf2dbg_final_check (); |
1934 | ||
e0001a05 NC |
1935 | #ifdef md_post_relax_hook |
1936 | md_post_relax_hook; | |
1937 | #endif | |
1938 | ||
d98b0e2b TG |
1939 | #ifdef OBJ_ELF |
1940 | if (IS_ELF) | |
1941 | create_obj_attrs_section (); | |
1942 | #endif | |
1943 | ||
252b5132 RH |
1944 | #ifndef WORKING_DOT_WORD |
1945 | { | |
1946 | struct broken_word *lie; | |
1947 | struct broken_word **prevP; | |
1948 | ||
1949 | prevP = &broken_words; | |
1950 | for (lie = broken_words; lie; lie = lie->next_broken_word) | |
1951 | if (!lie->added) | |
1952 | { | |
1953 | expressionS exp; | |
1954 | ||
1955 | subseg_change (lie->seg, lie->subseg); | |
1956 | exp.X_op = O_subtract; | |
1957 | exp.X_add_symbol = lie->add; | |
1958 | exp.X_op_symbol = lie->sub; | |
1959 | exp.X_add_number = lie->addnum; | |
252b5132 RH |
1960 | #ifdef TC_CONS_FIX_NEW |
1961 | TC_CONS_FIX_NEW (lie->frag, | |
efaf0ba4 | 1962 | lie->word_goes_here - lie->frag->fr_literal, |
62ebcb5c | 1963 | 2, &exp, TC_PARSE_CONS_RETURN_NONE); |
252b5132 RH |
1964 | #else |
1965 | fix_new_exp (lie->frag, | |
1966 | lie->word_goes_here - lie->frag->fr_literal, | |
1967 | 2, &exp, 0, BFD_RELOC_16); | |
1968 | #endif | |
252b5132 RH |
1969 | *prevP = lie->next_broken_word; |
1970 | } | |
1971 | else | |
1972 | prevP = &(lie->next_broken_word); | |
1973 | ||
1974 | for (lie = broken_words; lie;) | |
1975 | { | |
1976 | struct broken_word *untruth; | |
1977 | char *table_ptr; | |
1978 | addressT table_addr; | |
1979 | addressT from_addr, to_addr; | |
1980 | int n, m; | |
1981 | ||
1982 | subseg_change (lie->seg, lie->subseg); | |
1983 | fragP = lie->dispfrag; | |
1984 | ||
1985 | /* Find out how many broken_words go here. */ | |
1986 | n = 0; | |
efaf0ba4 NC |
1987 | for (untruth = lie; |
1988 | untruth && untruth->dispfrag == fragP; | |
1989 | untruth = untruth->next_broken_word) | |
252b5132 RH |
1990 | if (untruth->added == 1) |
1991 | n++; | |
1992 | ||
1993 | table_ptr = lie->dispfrag->fr_opcode; | |
efaf0ba4 NC |
1994 | table_addr = (lie->dispfrag->fr_address |
1995 | + (table_ptr - lie->dispfrag->fr_literal)); | |
252b5132 RH |
1996 | /* Create the jump around the long jumps. This is a short |
1997 | jump from table_ptr+0 to table_ptr+n*long_jump_size. */ | |
1998 | from_addr = table_addr; | |
1999 | to_addr = table_addr + md_short_jump_size + n * md_long_jump_size; | |
efaf0ba4 NC |
2000 | md_create_short_jump (table_ptr, from_addr, to_addr, lie->dispfrag, |
2001 | lie->add); | |
252b5132 RH |
2002 | table_ptr += md_short_jump_size; |
2003 | table_addr += md_short_jump_size; | |
2004 | ||
efaf0ba4 NC |
2005 | for (m = 0; |
2006 | lie && lie->dispfrag == fragP; | |
2007 | m++, lie = lie->next_broken_word) | |
252b5132 RH |
2008 | { |
2009 | if (lie->added == 2) | |
2010 | continue; | |
efaf0ba4 | 2011 | /* Patch the jump table. */ |
187af7df | 2012 | for (untruth = (struct broken_word *) (fragP->fr_symbol); |
efaf0ba4 NC |
2013 | untruth && untruth->dispfrag == fragP; |
2014 | untruth = untruth->next_broken_word) | |
252b5132 RH |
2015 | { |
2016 | if (untruth->use_jump == lie) | |
187af7df HPN |
2017 | { |
2018 | /* This is the offset from ??? to table_ptr+0. | |
2019 | The target is the same for all users of this | |
2020 | md_long_jump, but the "sub" bases (and hence the | |
2021 | offsets) may be different. */ | |
2022 | addressT to_word = table_addr - S_GET_VALUE (untruth->sub); | |
2023 | #ifdef TC_CHECK_ADJUSTED_BROKEN_DOT_WORD | |
2024 | TC_CHECK_ADJUSTED_BROKEN_DOT_WORD (to_word, untruth); | |
2025 | #endif | |
2026 | md_number_to_chars (untruth->word_goes_here, to_word, 2); | |
2027 | } | |
252b5132 RH |
2028 | } |
2029 | ||
efaf0ba4 NC |
2030 | /* Install the long jump. */ |
2031 | /* This is a long jump from table_ptr+0 to the final target. */ | |
252b5132 RH |
2032 | from_addr = table_addr; |
2033 | to_addr = S_GET_VALUE (lie->add) + lie->addnum; | |
efaf0ba4 NC |
2034 | md_create_long_jump (table_ptr, from_addr, to_addr, lie->dispfrag, |
2035 | lie->add); | |
252b5132 RH |
2036 | table_ptr += md_long_jump_size; |
2037 | table_addr += md_long_jump_size; | |
2038 | } | |
2039 | } | |
2040 | } | |
efaf0ba4 | 2041 | #endif /* not WORKING_DOT_WORD */ |
252b5132 | 2042 | |
252b5132 RH |
2043 | /* Resolve symbol values. This needs to be done before processing |
2044 | the relocations. */ | |
2045 | if (symbol_rootP) | |
2046 | { | |
2047 | symbolS *symp; | |
2048 | ||
2049 | for (symp = symbol_rootP; symp; symp = symbol_next (symp)) | |
6386f3a7 | 2050 | resolve_symbol_value (symp); |
252b5132 | 2051 | } |
49309057 | 2052 | resolve_local_symbol_values (); |
05e9452c | 2053 | resolve_reloc_expr_symbols (); |
252b5132 RH |
2054 | |
2055 | PROGRESS (1); | |
2056 | ||
2057 | #ifdef tc_frob_file_before_adjust | |
2058 | tc_frob_file_before_adjust (); | |
2059 | #endif | |
2060 | #ifdef obj_frob_file_before_adjust | |
2061 | obj_frob_file_before_adjust (); | |
2062 | #endif | |
2063 | ||
efaf0ba4 | 2064 | bfd_map_over_sections (stdoutput, adjust_reloc_syms, (char *) 0); |
252b5132 | 2065 | |
a161fe53 AM |
2066 | #ifdef tc_frob_file_before_fix |
2067 | tc_frob_file_before_fix (); | |
2068 | #endif | |
2069 | #ifdef obj_frob_file_before_fix | |
2070 | obj_frob_file_before_fix (); | |
2071 | #endif | |
2072 | ||
2073 | bfd_map_over_sections (stdoutput, fix_segment, (char *) 0); | |
2074 | ||
252b5132 RH |
2075 | /* Set up symbol table, and write it out. */ |
2076 | if (symbol_rootP) | |
2077 | { | |
2078 | symbolS *symp; | |
aaac53f5 | 2079 | bfd_boolean skip_next_symbol = FALSE; |
252b5132 RH |
2080 | |
2081 | for (symp = symbol_rootP; symp; symp = symbol_next (symp)) | |
2082 | { | |
2083 | int punt = 0; | |
2084 | const char *name; | |
2085 | ||
aaac53f5 HPN |
2086 | if (skip_next_symbol) |
2087 | { | |
2088 | /* Don't do anything besides moving the value of the | |
2089 | symbol from the GAS value-field to the BFD value-field. */ | |
2090 | symbol_get_bfdsym (symp)->value = S_GET_VALUE (symp); | |
2091 | skip_next_symbol = FALSE; | |
2092 | continue; | |
2093 | } | |
2094 | ||
49309057 | 2095 | if (symbol_mri_common_p (symp)) |
252b5132 RH |
2096 | { |
2097 | if (S_IS_EXTERNAL (symp)) | |
2098 | as_bad (_("%s: global symbols not supported in common sections"), | |
2099 | S_GET_NAME (symp)); | |
2100 | symbol_remove (symp, &symbol_rootP, &symbol_lastP); | |
2101 | continue; | |
2102 | } | |
2103 | ||
2104 | name = S_GET_NAME (symp); | |
2105 | if (name) | |
2106 | { | |
efaf0ba4 NC |
2107 | const char *name2 = |
2108 | decode_local_label_name ((char *) S_GET_NAME (symp)); | |
252b5132 RH |
2109 | /* They only differ if `name' is a fb or dollar local |
2110 | label name. */ | |
2111 | if (name2 != name && ! S_IS_DEFINED (symp)) | |
0e389e77 | 2112 | as_bad (_("local label `%s' is not defined"), name2); |
252b5132 RH |
2113 | } |
2114 | ||
2115 | /* Do it again, because adjust_reloc_syms might introduce | |
2116 | more symbols. They'll probably only be section symbols, | |
2117 | but they'll still need to have the values computed. */ | |
6386f3a7 | 2118 | resolve_symbol_value (symp); |
252b5132 RH |
2119 | |
2120 | /* Skip symbols which were equated to undefined or common | |
b4b24b79 | 2121 | symbols. */ |
06e77878 AO |
2122 | if (symbol_equated_reloc_p (symp) |
2123 | || S_IS_WEAKREFR (symp)) | |
252b5132 | 2124 | { |
91d6fa6a NC |
2125 | const char *sname = S_GET_NAME (symp); |
2126 | ||
60938e80 | 2127 | if (S_IS_COMMON (symp) |
91d6fa6a | 2128 | && !TC_FAKE_LABEL (sname) |
76db0a2e | 2129 | && !S_IS_WEAKREFR (symp)) |
60938e80 L |
2130 | { |
2131 | expressionS *e = symbol_get_value_expression (symp); | |
91d6fa6a | 2132 | |
76db0a2e | 2133 | as_bad (_("`%s' can't be equated to common symbol `%s'"), |
91d6fa6a | 2134 | sname, S_GET_NAME (e->X_add_symbol)); |
60938e80 | 2135 | } |
d0548f34 L |
2136 | if (S_GET_SEGMENT (symp) == reg_section) |
2137 | { | |
2138 | /* Report error only if we know the symbol name. */ | |
2139 | if (S_GET_NAME (symp) != reg_section->name) | |
2140 | as_bad (_("can't make global register symbol `%s'"), | |
91d6fa6a | 2141 | sname); |
d0548f34 | 2142 | } |
252b5132 RH |
2143 | symbol_remove (symp, &symbol_rootP, &symbol_lastP); |
2144 | continue; | |
2145 | } | |
2146 | ||
252b5132 RH |
2147 | #ifdef obj_frob_symbol |
2148 | obj_frob_symbol (symp, punt); | |
2149 | #endif | |
2150 | #ifdef tc_frob_symbol | |
49309057 | 2151 | if (! punt || symbol_used_in_reloc_p (symp)) |
252b5132 RH |
2152 | tc_frob_symbol (symp, punt); |
2153 | #endif | |
2154 | ||
2155 | /* If we don't want to keep this symbol, splice it out of | |
2156 | the chain now. If EMIT_SECTION_SYMBOLS is 0, we never | |
2157 | want section symbols. Otherwise, we skip local symbols | |
2158 | and symbols that the frob_symbol macros told us to punt, | |
2159 | but we keep such symbols if they are used in relocs. */ | |
a161fe53 AM |
2160 | if (symp == abs_section_sym |
2161 | || (! EMIT_SECTION_SYMBOLS | |
2162 | && symbol_section_p (symp)) | |
e97b3f28 | 2163 | /* Note that S_IS_EXTERNAL and S_IS_LOCAL are not always |
252b5132 RH |
2164 | opposites. Sometimes the former checks flags and the |
2165 | latter examines the name... */ | |
e97b3f28 | 2166 | || (!S_IS_EXTERNAL (symp) |
461b725f AO |
2167 | && (punt || S_IS_LOCAL (symp) || |
2168 | (S_IS_WEAKREFD (symp) && ! symbol_used_p (symp))) | |
49309057 | 2169 | && ! symbol_used_in_reloc_p (symp))) |
252b5132 RH |
2170 | { |
2171 | symbol_remove (symp, &symbol_rootP, &symbol_lastP); | |
efaf0ba4 | 2172 | |
252b5132 RH |
2173 | /* After symbol_remove, symbol_next(symp) still returns |
2174 | the one that came after it in the chain. So we don't | |
2175 | need to do any extra cleanup work here. */ | |
252b5132 RH |
2176 | continue; |
2177 | } | |
2178 | ||
2179 | /* Make sure we really got a value for the symbol. */ | |
49309057 | 2180 | if (! symbol_resolved_p (symp)) |
252b5132 | 2181 | { |
0e389e77 | 2182 | as_bad (_("can't resolve value for symbol `%s'"), |
252b5132 | 2183 | S_GET_NAME (symp)); |
49309057 | 2184 | symbol_mark_resolved (symp); |
252b5132 RH |
2185 | } |
2186 | ||
2187 | /* Set the value into the BFD symbol. Up til now the value | |
2188 | has only been kept in the gas symbolS struct. */ | |
49309057 | 2189 | symbol_get_bfdsym (symp)->value = S_GET_VALUE (symp); |
aaac53f5 HPN |
2190 | |
2191 | /* A warning construct is a warning symbol followed by the | |
2192 | symbol warned about. Don't let anything object-format or | |
2193 | target-specific muck with it; it's ready for output. */ | |
2194 | if (symbol_get_bfdsym (symp)->flags & BSF_WARNING) | |
2195 | skip_next_symbol = TRUE; | |
252b5132 RH |
2196 | } |
2197 | } | |
2198 | ||
2199 | PROGRESS (1); | |
2200 | ||
2201 | /* Now do any format-specific adjustments to the symbol table, such | |
2202 | as adding file symbols. */ | |
2203 | #ifdef tc_adjust_symtab | |
2204 | tc_adjust_symtab (); | |
2205 | #endif | |
2206 | #ifdef obj_adjust_symtab | |
2207 | obj_adjust_symtab (); | |
2208 | #endif | |
2209 | ||
d0548f34 L |
2210 | /* Stop if there is an error. */ |
2211 | if (had_errors ()) | |
2212 | return; | |
2213 | ||
252b5132 RH |
2214 | /* Now that all the sizes are known, and contents correct, we can |
2215 | start writing to the file. */ | |
2ae08483 | 2216 | set_symtab (); |
252b5132 RH |
2217 | |
2218 | /* If *_frob_file changes the symbol value at this point, it is | |
2219 | responsible for moving the changed value into symp->bsym->value | |
2220 | as well. Hopefully all symbol value changing can be done in | |
2221 | *_frob_symbol. */ | |
2222 | #ifdef tc_frob_file | |
2223 | tc_frob_file (); | |
2224 | #endif | |
2225 | #ifdef obj_frob_file | |
2226 | obj_frob_file (); | |
2227 | #endif | |
f3d2b04b KT |
2228 | #ifdef obj_coff_generate_pdata |
2229 | obj_coff_generate_pdata (); | |
2230 | #endif | |
252b5132 RH |
2231 | bfd_map_over_sections (stdoutput, write_relocs, (char *) 0); |
2232 | ||
f1c2d4af | 2233 | #ifdef tc_frob_file_after_relocs |
252b5132 RH |
2234 | tc_frob_file_after_relocs (); |
2235 | #endif | |
2236 | #ifdef obj_frob_file_after_relocs | |
2237 | obj_frob_file_after_relocs (); | |
2238 | #endif | |
f1c2d4af | 2239 | |
b8871f35 L |
2240 | #if defined OBJ_ELF || defined OBJ_MAYBE_ELF |
2241 | if (IS_ELF && flag_use_elf_stt_common) | |
2242 | stdoutput->flags |= BFD_CONVERT_ELF_COMMON | BFD_USE_ELF_STT_COMMON; | |
2243 | #endif | |
2244 | ||
0acf065b CC |
2245 | /* Once all relocations have been written, we can compress the |
2246 | contents of the debug sections. This needs to be done before | |
2247 | we start writing any sections, because it will affect the file | |
2248 | layout, which is fixed once we start writing contents. */ | |
2249 | if (flag_compress_debug) | |
8ecb73dd L |
2250 | { |
2251 | if (flag_compress_debug == COMPRESS_DEBUG_GABI_ZLIB) | |
2252 | stdoutput->flags |= BFD_COMPRESS | BFD_COMPRESS_GABI; | |
2253 | else | |
2254 | stdoutput->flags |= BFD_COMPRESS; | |
2255 | bfd_map_over_sections (stdoutput, compress_debug, (char *) 0); | |
2256 | } | |
0acf065b | 2257 | |
252b5132 | 2258 | bfd_map_over_sections (stdoutput, write_contents, (char *) 0); |
252b5132 | 2259 | } |
252b5132 RH |
2260 | |
2261 | #ifdef TC_GENERIC_RELAX_TABLE | |
252b5132 RH |
2262 | /* Relax a fragment by scanning TC_GENERIC_RELAX_TABLE. */ |
2263 | ||
2264 | long | |
d7342424 | 2265 | relax_frag (segT segment, fragS *fragP, long stretch) |
252b5132 RH |
2266 | { |
2267 | const relax_typeS *this_type; | |
2268 | const relax_typeS *start_type; | |
2269 | relax_substateT next_state; | |
2270 | relax_substateT this_state; | |
685736be | 2271 | offsetT growth; |
38686296 AM |
2272 | offsetT aim; |
2273 | addressT target; | |
2274 | addressT address; | |
2275 | symbolS *symbolP; | |
2276 | const relax_typeS *table; | |
2277 | ||
2278 | target = fragP->fr_offset; | |
2279 | address = fragP->fr_address; | |
2280 | table = TC_GENERIC_RELAX_TABLE; | |
252b5132 RH |
2281 | this_state = fragP->fr_subtype; |
2282 | start_type = this_type = table + this_state; | |
38686296 | 2283 | symbolP = fragP->fr_symbol; |
252b5132 RH |
2284 | |
2285 | if (symbolP) | |
2286 | { | |
c842b53a ILT |
2287 | fragS *sym_frag; |
2288 | ||
2289 | sym_frag = symbol_get_frag (symbolP); | |
2290 | ||
252b5132 | 2291 | #ifndef DIFF_EXPR_OK |
c842b53a | 2292 | know (sym_frag != NULL); |
252b5132 | 2293 | #endif |
a161fe53 | 2294 | know (S_GET_SEGMENT (symbolP) != absolute_section |
c842b53a | 2295 | || sym_frag == &zero_address_frag); |
ac62c346 | 2296 | target += S_GET_VALUE (symbolP); |
252b5132 | 2297 | |
e35a414d AM |
2298 | /* If SYM_FRAG has yet to be reached on this pass, assume it |
2299 | will move by STRETCH just as we did, unless there is an | |
2300 | alignment frag between here and SYM_FRAG. An alignment may | |
2301 | well absorb any STRETCH, and we don't want to choose a larger | |
2302 | branch insn by overestimating the needed reach of this | |
2303 | branch. It isn't critical to calculate TARGET exactly; We | |
2304 | know we'll be doing another pass if STRETCH is non-zero. */ | |
252b5132 | 2305 | |
c842b53a | 2306 | if (stretch != 0 |
38686296 AM |
2307 | && sym_frag->relax_marker != fragP->relax_marker |
2308 | && S_GET_SEGMENT (symbolP) == segment) | |
252b5132 | 2309 | { |
e35a414d AM |
2310 | if (stretch < 0 |
2311 | || sym_frag->region == fragP->region) | |
2312 | target += stretch; | |
e5940dff AM |
2313 | /* If we get here we know we have a forward branch. This |
2314 | relax pass may have stretched previous instructions so | |
2315 | far that omitting STRETCH would make the branch | |
2316 | negative. Don't allow this in case the negative reach is | |
2317 | large enough to require a larger branch instruction. */ | |
2318 | else if (target < address) | |
2319 | target = fragP->fr_next->fr_address + stretch; | |
252b5132 RH |
2320 | } |
2321 | } | |
2322 | ||
2323 | aim = target - address - fragP->fr_fix; | |
2324 | #ifdef TC_PCREL_ADJUST | |
efaf0ba4 NC |
2325 | /* Currently only the ns32k family needs this. */ |
2326 | aim += TC_PCREL_ADJUST (fragP); | |
efaf0ba4 | 2327 | #endif |
59c871b4 BE |
2328 | |
2329 | #ifdef md_prepare_relax_scan | |
2330 | /* Formerly called M68K_AIM_KLUDGE. */ | |
252b5132 RH |
2331 | md_prepare_relax_scan (fragP, address, aim, this_state, this_type); |
2332 | #endif | |
2333 | ||
2334 | if (aim < 0) | |
2335 | { | |
efaf0ba4 | 2336 | /* Look backwards. */ |
252b5132 RH |
2337 | for (next_state = this_type->rlx_more; next_state;) |
2338 | if (aim >= this_type->rlx_backward) | |
2339 | next_state = 0; | |
2340 | else | |
2341 | { | |
efaf0ba4 | 2342 | /* Grow to next state. */ |
252b5132 RH |
2343 | this_state = next_state; |
2344 | this_type = table + this_state; | |
2345 | next_state = this_type->rlx_more; | |
2346 | } | |
2347 | } | |
2348 | else | |
2349 | { | |
efaf0ba4 | 2350 | /* Look forwards. */ |
252b5132 RH |
2351 | for (next_state = this_type->rlx_more; next_state;) |
2352 | if (aim <= this_type->rlx_forward) | |
2353 | next_state = 0; | |
2354 | else | |
2355 | { | |
efaf0ba4 | 2356 | /* Grow to next state. */ |
252b5132 RH |
2357 | this_state = next_state; |
2358 | this_type = table + this_state; | |
2359 | next_state = this_type->rlx_more; | |
2360 | } | |
2361 | } | |
2362 | ||
2363 | growth = this_type->rlx_length - start_type->rlx_length; | |
2364 | if (growth != 0) | |
2365 | fragP->fr_subtype = this_state; | |
2366 | return growth; | |
2367 | } | |
2368 | ||
efaf0ba4 | 2369 | #endif /* defined (TC_GENERIC_RELAX_TABLE) */ |
252b5132 RH |
2370 | |
2371 | /* Relax_align. Advance location counter to next address that has 'alignment' | |
2372 | lowest order bits all 0s, return size of adjustment made. */ | |
2373 | static relax_addressT | |
ed9e98c2 AM |
2374 | relax_align (relax_addressT address, /* Address now. */ |
2375 | int alignment /* Alignment (binary). */) | |
252b5132 RH |
2376 | { |
2377 | relax_addressT mask; | |
2378 | relax_addressT new_address; | |
2379 | ||
65879393 | 2380 | mask = ~((relax_addressT) ~0 << alignment); |
252b5132 RH |
2381 | new_address = (address + mask) & (~mask); |
2382 | #ifdef LINKER_RELAXING_SHRINKS_ONLY | |
2383 | if (linkrelax) | |
2384 | /* We must provide lots of padding, so the linker can discard it | |
2385 | when needed. The linker will not add extra space, ever. */ | |
2386 | new_address += (1 << alignment); | |
2387 | #endif | |
2388 | return (new_address - address); | |
2389 | } | |
2390 | ||
efaf0ba4 NC |
2391 | /* Now we have a segment, not a crowd of sub-segments, we can make |
2392 | fr_address values. | |
58a77e41 | 2393 | |
efaf0ba4 | 2394 | Relax the frags. |
58a77e41 | 2395 | |
efaf0ba4 NC |
2396 | After this, all frags in this segment have addresses that are correct |
2397 | within the segment. Since segments live in different file addresses, | |
2398 | these frag addresses may not be the same as final object-file | |
2399 | addresses. */ | |
2400 | ||
e46d99eb | 2401 | int |
32638454 | 2402 | relax_segment (struct frag *segment_frag_root, segT segment, int pass) |
252b5132 | 2403 | { |
4111faa5 NC |
2404 | unsigned long frag_count; |
2405 | struct frag *fragP; | |
2406 | relax_addressT address; | |
e35a414d | 2407 | int region; |
e46d99eb AM |
2408 | int ret; |
2409 | ||
efaf0ba4 | 2410 | /* In case md_estimate_size_before_relax() wants to make fixSs. */ |
252b5132 RH |
2411 | subseg_change (segment, 0); |
2412 | ||
2413 | /* For each frag in segment: count and store (a 1st guess of) | |
2414 | fr_address. */ | |
2415 | address = 0; | |
e35a414d | 2416 | region = 0; |
4111faa5 NC |
2417 | for (frag_count = 0, fragP = segment_frag_root; |
2418 | fragP; | |
2419 | fragP = fragP->fr_next, frag_count ++) | |
252b5132 | 2420 | { |
e35a414d | 2421 | fragP->region = region; |
38686296 | 2422 | fragP->relax_marker = 0; |
252b5132 RH |
2423 | fragP->fr_address = address; |
2424 | address += fragP->fr_fix; | |
2425 | ||
2426 | switch (fragP->fr_type) | |
2427 | { | |
2428 | case rs_fill: | |
2429 | address += fragP->fr_offset * fragP->fr_var; | |
2430 | break; | |
2431 | ||
2432 | case rs_align: | |
2433 | case rs_align_code: | |
0a9ef439 | 2434 | case rs_align_test: |
252b5132 RH |
2435 | { |
2436 | addressT offset = relax_align (address, (int) fragP->fr_offset); | |
2437 | ||
2438 | if (fragP->fr_subtype != 0 && offset > fragP->fr_subtype) | |
2439 | offset = 0; | |
2440 | ||
2441 | if (offset % fragP->fr_var != 0) | |
2442 | { | |
54d3cad9 | 2443 | as_bad_where (fragP->fr_file, fragP->fr_line, |
992a06ee AM |
2444 | ngettext ("alignment padding (%lu byte) " |
2445 | "not a multiple of %ld", | |
2446 | "alignment padding (%lu bytes) " | |
2447 | "not a multiple of %ld", | |
2448 | (unsigned long) offset), | |
54d3cad9 | 2449 | (unsigned long) offset, (long) fragP->fr_var); |
252b5132 RH |
2450 | offset -= (offset % fragP->fr_var); |
2451 | } | |
2452 | ||
2453 | address += offset; | |
e35a414d | 2454 | region += 1; |
252b5132 RH |
2455 | } |
2456 | break; | |
2457 | ||
2458 | case rs_org: | |
252b5132 | 2459 | /* Assume .org is nugatory. It will grow with 1st relax. */ |
e35a414d AM |
2460 | region += 1; |
2461 | break; | |
2462 | ||
2463 | case rs_space: | |
252b5132 RH |
2464 | break; |
2465 | ||
2466 | case rs_machine_dependent: | |
e0890092 AM |
2467 | /* If fr_symbol is an expression, this call to |
2468 | resolve_symbol_value sets up the correct segment, which will | |
2469 | likely be needed in md_estimate_size_before_relax. */ | |
2470 | if (fragP->fr_symbol) | |
2471 | resolve_symbol_value (fragP->fr_symbol); | |
2472 | ||
252b5132 RH |
2473 | address += md_estimate_size_before_relax (fragP, segment); |
2474 | break; | |
2475 | ||
2476 | #ifndef WORKING_DOT_WORD | |
efaf0ba4 | 2477 | /* Broken words don't concern us yet. */ |
252b5132 RH |
2478 | case rs_broken_word: |
2479 | break; | |
2480 | #endif | |
2481 | ||
2482 | case rs_leb128: | |
efaf0ba4 | 2483 | /* Initial guess is always 1; doing otherwise can result in |
252b5132 RH |
2484 | stable solutions that are larger than the minimum. */ |
2485 | address += fragP->fr_offset = 1; | |
2486 | break; | |
2487 | ||
2488 | case rs_cfa: | |
2489 | address += eh_frame_estimate_size_before_relax (fragP); | |
2490 | break; | |
2491 | ||
220e750f RH |
2492 | case rs_dwarf2dbg: |
2493 | address += dwarf2dbg_estimate_size_before_relax (fragP); | |
2494 | break; | |
2495 | ||
252b5132 RH |
2496 | default: |
2497 | BAD_CASE (fragP->fr_type); | |
2498 | break; | |
efaf0ba4 NC |
2499 | } |
2500 | } | |
252b5132 RH |
2501 | |
2502 | /* Do relax(). */ | |
2503 | { | |
4111faa5 | 2504 | unsigned long max_iterations; |
d1c5f158 AM |
2505 | |
2506 | /* Cumulative address adjustment. */ | |
2507 | offsetT stretch; | |
2508 | ||
2509 | /* Have we made any adjustment this pass? We can't just test | |
2510 | stretch because one piece of code may have grown and another | |
2511 | shrank. */ | |
2512 | int stretched; | |
2513 | ||
2514 | /* Most horrible, but gcc may give us some exception data that | |
2515 | is impossible to assemble, of the form | |
2516 | ||
2517 | .align 4 | |
2518 | .byte 0, 0 | |
2519 | .uleb128 end - start | |
2520 | start: | |
2521 | .space 128*128 - 1 | |
2522 | .align 4 | |
2523 | end: | |
2524 | ||
2525 | If the leb128 is two bytes in size, then end-start is 128*128, | |
2526 | which requires a three byte leb128. If the leb128 is three | |
2527 | bytes in size, then end-start is 128*128-1, which requires a | |
2528 | two byte leb128. We work around this dilemma by inserting | |
2529 | an extra 4 bytes of alignment just after the .align. This | |
2530 | works because the data after the align is accessed relative to | |
2531 | the end label. | |
2532 | ||
2533 | This counter is used in a tiny state machine to detect | |
2534 | whether a leb128 followed by an align is impossible to | |
2535 | relax. */ | |
2536 | int rs_leb128_fudge = 0; | |
252b5132 | 2537 | |
4111faa5 NC |
2538 | /* We want to prevent going into an infinite loop where one frag grows |
2539 | depending upon the location of a symbol which is in turn moved by | |
2540 | the growing frag. eg: | |
2541 | ||
b4b24b79 AM |
2542 | foo = . |
2543 | .org foo+16 | |
2544 | foo = . | |
4111faa5 | 2545 | |
b4b24b79 | 2546 | So we dictate that this algorithm can be at most O2. */ |
4111faa5 NC |
2547 | max_iterations = frag_count * frag_count; |
2548 | /* Check for overflow. */ | |
2549 | if (max_iterations < frag_count) | |
2550 | max_iterations = frag_count; | |
2551 | ||
32638454 | 2552 | ret = 0; |
252b5132 RH |
2553 | do |
2554 | { | |
e46d99eb AM |
2555 | stretch = 0; |
2556 | stretched = 0; | |
58a77e41 | 2557 | |
252b5132 RH |
2558 | for (fragP = segment_frag_root; fragP; fragP = fragP->fr_next) |
2559 | { | |
685736be | 2560 | offsetT growth = 0; |
252b5132 RH |
2561 | addressT was_address; |
2562 | offsetT offset; | |
2563 | symbolS *symbolP; | |
2564 | ||
38686296 | 2565 | fragP->relax_marker ^= 1; |
252b5132 RH |
2566 | was_address = fragP->fr_address; |
2567 | address = fragP->fr_address += stretch; | |
2568 | symbolP = fragP->fr_symbol; | |
2569 | offset = fragP->fr_offset; | |
2570 | ||
2571 | switch (fragP->fr_type) | |
2572 | { | |
efaf0ba4 | 2573 | case rs_fill: /* .fill never relaxes. */ |
252b5132 RH |
2574 | growth = 0; |
2575 | break; | |
2576 | ||
2577 | #ifndef WORKING_DOT_WORD | |
2578 | /* JF: This is RMS's idea. I do *NOT* want to be blamed | |
2579 | for it I do not want to write it. I do not want to have | |
2580 | anything to do with it. This is not the proper way to | |
2581 | implement this misfeature. */ | |
2582 | case rs_broken_word: | |
2583 | { | |
2584 | struct broken_word *lie; | |
2585 | struct broken_word *untruth; | |
2586 | ||
2587 | /* Yes this is ugly (storing the broken_word pointer | |
2588 | in the symbol slot). Still, this whole chunk of | |
2589 | code is ugly, and I don't feel like doing anything | |
2590 | about it. Think of it as stubbornness in action. */ | |
2591 | growth = 0; | |
2592 | for (lie = (struct broken_word *) (fragP->fr_symbol); | |
2593 | lie && lie->dispfrag == fragP; | |
2594 | lie = lie->next_broken_word) | |
2595 | { | |
2596 | ||
2597 | if (lie->added) | |
2598 | continue; | |
2599 | ||
ac62c346 | 2600 | offset = (S_GET_VALUE (lie->add) |
252b5132 | 2601 | + lie->addnum |
ac62c346 | 2602 | - S_GET_VALUE (lie->sub)); |
252b5132 RH |
2603 | if (offset <= -32768 || offset >= 32767) |
2604 | { | |
2605 | if (flag_warn_displacement) | |
2606 | { | |
2607 | char buf[50]; | |
2608 | sprint_value (buf, (addressT) lie->addnum); | |
54d3cad9 AM |
2609 | as_warn_where (fragP->fr_file, fragP->fr_line, |
2610 | _(".word %s-%s+%s didn't fit"), | |
2611 | S_GET_NAME (lie->add), | |
2612 | S_GET_NAME (lie->sub), | |
2613 | buf); | |
252b5132 | 2614 | } |
252b5132 RH |
2615 | if (fragP->fr_subtype == 0) |
2616 | { | |
2617 | fragP->fr_subtype++; | |
2618 | growth += md_short_jump_size; | |
2619 | } | |
187af7df HPN |
2620 | |
2621 | /* Redirect *all* words of this table with the same | |
2622 | target, lest we have to handle the case where the | |
2623 | same target but with a offset that fits on this | |
2624 | round overflows at the next relaxation round. */ | |
2625 | for (untruth = (struct broken_word *) (fragP->fr_symbol); | |
252b5132 RH |
2626 | untruth && untruth->dispfrag == lie->dispfrag; |
2627 | untruth = untruth->next_broken_word) | |
49309057 ILT |
2628 | if ((symbol_get_frag (untruth->add) |
2629 | == symbol_get_frag (lie->add)) | |
2630 | && (S_GET_VALUE (untruth->add) | |
2631 | == S_GET_VALUE (lie->add))) | |
252b5132 RH |
2632 | { |
2633 | untruth->added = 2; | |
2634 | untruth->use_jump = lie; | |
2635 | } | |
187af7df HPN |
2636 | |
2637 | lie->added = 1; | |
252b5132 RH |
2638 | growth += md_long_jump_size; |
2639 | } | |
2640 | } | |
2641 | ||
2642 | break; | |
efaf0ba4 | 2643 | } /* case rs_broken_word */ |
252b5132 RH |
2644 | #endif |
2645 | case rs_align: | |
2646 | case rs_align_code: | |
0a9ef439 | 2647 | case rs_align_test: |
252b5132 RH |
2648 | { |
2649 | addressT oldoff, newoff; | |
2650 | ||
2651 | oldoff = relax_align (was_address + fragP->fr_fix, | |
2652 | (int) offset); | |
2653 | newoff = relax_align (address + fragP->fr_fix, | |
2654 | (int) offset); | |
2655 | ||
2656 | if (fragP->fr_subtype != 0) | |
2657 | { | |
2658 | if (oldoff > fragP->fr_subtype) | |
2659 | oldoff = 0; | |
2660 | if (newoff > fragP->fr_subtype) | |
2661 | newoff = 0; | |
2662 | } | |
2663 | ||
2664 | growth = newoff - oldoff; | |
d1c5f158 AM |
2665 | |
2666 | /* If this align happens to follow a leb128 and | |
2667 | we have determined that the leb128 is bouncing | |
2668 | in size, then break the cycle by inserting an | |
2669 | extra alignment. */ | |
2670 | if (growth < 0 | |
2671 | && (rs_leb128_fudge & 16) != 0 | |
2672 | && (rs_leb128_fudge & 15) >= 2) | |
2673 | { | |
2674 | segment_info_type *seginfo = seg_info (segment); | |
2675 | struct obstack *ob = &seginfo->frchainP->frch_obstack; | |
2676 | struct frag *newf; | |
2677 | ||
2678 | newf = frag_alloc (ob); | |
2679 | obstack_blank_fast (ob, fragP->fr_var); | |
2680 | obstack_finish (ob); | |
2681 | memcpy (newf, fragP, SIZEOF_STRUCT_FRAG); | |
2682 | memcpy (newf->fr_literal, | |
2683 | fragP->fr_literal + fragP->fr_fix, | |
2684 | fragP->fr_var); | |
2685 | newf->fr_type = rs_fill; | |
20f5cfbd | 2686 | newf->fr_address = address + fragP->fr_fix + newoff; |
d1c5f158 AM |
2687 | newf->fr_fix = 0; |
2688 | newf->fr_offset = (((offsetT) 1 << fragP->fr_offset) | |
2689 | / fragP->fr_var); | |
2690 | if (newf->fr_offset * newf->fr_var | |
2691 | != (offsetT) 1 << fragP->fr_offset) | |
2692 | { | |
2693 | newf->fr_offset = (offsetT) 1 << fragP->fr_offset; | |
2694 | newf->fr_var = 1; | |
2695 | } | |
20f5cfbd | 2696 | /* Include size of new frag in GROWTH. */ |
d1c5f158 | 2697 | growth += newf->fr_offset * newf->fr_var; |
20f5cfbd AM |
2698 | /* Adjust the new frag address for the amount |
2699 | we'll add when we process the new frag. */ | |
2700 | newf->fr_address -= stretch + growth; | |
d1c5f158 AM |
2701 | newf->relax_marker ^= 1; |
2702 | fragP->fr_next = newf; | |
2703 | #ifdef DEBUG | |
2704 | as_warn (_("padding added")); | |
2705 | #endif | |
2706 | } | |
252b5132 RH |
2707 | } |
2708 | break; | |
2709 | ||
2710 | case rs_org: | |
2711 | { | |
e46d99eb AM |
2712 | addressT target = offset; |
2713 | addressT after; | |
252b5132 RH |
2714 | |
2715 | if (symbolP) | |
2716 | { | |
b4b24b79 AM |
2717 | /* Convert from an actual address to an octet offset |
2718 | into the section. Here it is assumed that the | |
2719 | section's VMA is zero, and can omit subtracting it | |
2720 | from the symbol's value to get the address offset. */ | |
2721 | know (S_GET_SEGMENT (symbolP)->vma == 0); | |
6e917903 | 2722 | target += S_GET_VALUE (symbolP) * OCTETS_PER_BYTE; |
ac62c346 | 2723 | } |
252b5132 RH |
2724 | |
2725 | know (fragP->fr_next); | |
6afe8e98 | 2726 | after = fragP->fr_next->fr_address + stretch; |
252b5132 | 2727 | growth = target - after; |
9875b365 MR |
2728 | |
2729 | /* Growth may be negative, but variable part of frag | |
2730 | cannot have fewer than 0 chars. That is, we can't | |
2731 | .org backwards. */ | |
2732 | if (address + fragP->fr_fix > target) | |
252b5132 | 2733 | { |
32638454 AM |
2734 | growth = 0; |
2735 | ||
2736 | /* Don't error on first few frag relax passes. | |
2737 | The symbol might be an expression involving | |
2738 | symbol values from other sections. If those | |
2739 | sections have not yet been processed their | |
2740 | frags will all have zero addresses, so we | |
2741 | will calculate incorrect values for them. The | |
2742 | number of passes we allow before giving an | |
2743 | error is somewhat arbitrary. It should be at | |
2744 | least one, with larger values requiring | |
2745 | increasingly contrived dependencies between | |
2746 | frags to trigger a false error. */ | |
2747 | if (pass < 2) | |
2748 | { | |
2749 | /* Force another pass. */ | |
2750 | ret = 1; | |
2751 | break; | |
2752 | } | |
2753 | ||
14ad458a | 2754 | as_bad_where (fragP->fr_file, fragP->fr_line, |
685736be | 2755 | _("attempt to move .org backwards")); |
14ad458a ILT |
2756 | |
2757 | /* We've issued an error message. Change the | |
b4b24b79 | 2758 | frag to avoid cascading errors. */ |
14ad458a ILT |
2759 | fragP->fr_type = rs_align; |
2760 | fragP->fr_subtype = 0; | |
2761 | fragP->fr_offset = 0; | |
6afe8e98 | 2762 | fragP->fr_fix = after - address; |
252b5132 | 2763 | } |
252b5132 | 2764 | } |
6afe8e98 | 2765 | break; |
252b5132 RH |
2766 | |
2767 | case rs_space: | |
54d3cad9 | 2768 | growth = 0; |
252b5132 RH |
2769 | if (symbolP) |
2770 | { | |
766c03c9 AM |
2771 | offsetT amount; |
2772 | ||
2773 | amount = S_GET_VALUE (symbolP); | |
9e40345d | 2774 | if (S_GET_SEGMENT (symbolP) != absolute_section |
252b5132 RH |
2775 | || S_IS_COMMON (symbolP) |
2776 | || ! S_IS_DEFINED (symbolP)) | |
252b5132 | 2777 | { |
54d3cad9 AM |
2778 | as_bad_where (fragP->fr_file, fragP->fr_line, |
2779 | _(".space specifies non-absolute value")); | |
2780 | /* Prevent repeat of this error message. */ | |
2781 | fragP->fr_symbol = 0; | |
2782 | } | |
2783 | else if (amount < 0) | |
2784 | { | |
32638454 AM |
2785 | /* Don't error on first few frag relax passes. |
2786 | See rs_org comment for a longer explanation. */ | |
2787 | if (pass < 2) | |
2788 | { | |
2789 | ret = 1; | |
2790 | break; | |
2791 | } | |
2792 | ||
54d3cad9 AM |
2793 | as_warn_where (fragP->fr_file, fragP->fr_line, |
2794 | _(".space or .fill with negative value, ignored")); | |
766c03c9 | 2795 | fragP->fr_symbol = 0; |
252b5132 | 2796 | } |
54d3cad9 | 2797 | else |
050be34e | 2798 | growth = (was_address + fragP->fr_fix + amount |
54d3cad9 | 2799 | - fragP->fr_next->fr_address); |
252b5132 | 2800 | } |
252b5132 RH |
2801 | break; |
2802 | ||
2803 | case rs_machine_dependent: | |
2804 | #ifdef md_relax_frag | |
c842b53a | 2805 | growth = md_relax_frag (segment, fragP, stretch); |
252b5132 RH |
2806 | #else |
2807 | #ifdef TC_GENERIC_RELAX_TABLE | |
2808 | /* The default way to relax a frag is to look through | |
2809 | TC_GENERIC_RELAX_TABLE. */ | |
c842b53a | 2810 | growth = relax_frag (segment, fragP, stretch); |
efaf0ba4 | 2811 | #endif /* TC_GENERIC_RELAX_TABLE */ |
252b5132 RH |
2812 | #endif |
2813 | break; | |
2814 | ||
2815 | case rs_leb128: | |
2816 | { | |
2817 | valueT value; | |
685736be | 2818 | offsetT size; |
252b5132 | 2819 | |
6386f3a7 | 2820 | value = resolve_symbol_value (fragP->fr_symbol); |
252b5132 RH |
2821 | size = sizeof_leb128 (value, fragP->fr_subtype); |
2822 | growth = size - fragP->fr_offset; | |
2823 | fragP->fr_offset = size; | |
2824 | } | |
2825 | break; | |
2826 | ||
2827 | case rs_cfa: | |
2828 | growth = eh_frame_relax_frag (fragP); | |
2829 | break; | |
2830 | ||
220e750f RH |
2831 | case rs_dwarf2dbg: |
2832 | growth = dwarf2dbg_relax_frag (fragP); | |
2833 | break; | |
2834 | ||
252b5132 RH |
2835 | default: |
2836 | BAD_CASE (fragP->fr_type); | |
2837 | break; | |
2838 | } | |
2839 | if (growth) | |
2840 | { | |
2841 | stretch += growth; | |
e46d99eb | 2842 | stretched = 1; |
d1c5f158 AM |
2843 | if (fragP->fr_type == rs_leb128) |
2844 | rs_leb128_fudge += 16; | |
2845 | else if (fragP->fr_type == rs_align | |
2846 | && (rs_leb128_fudge & 16) != 0 | |
2847 | && stretch == 0) | |
2848 | rs_leb128_fudge += 16; | |
2849 | else | |
2850 | rs_leb128_fudge = 0; | |
252b5132 | 2851 | } |
4111faa5 | 2852 | } |
d1c5f158 AM |
2853 | |
2854 | if (stretch == 0 | |
2855 | && (rs_leb128_fudge & 16) == 0 | |
2856 | && (rs_leb128_fudge & -16) != 0) | |
2857 | rs_leb128_fudge += 1; | |
2858 | else | |
2859 | rs_leb128_fudge = 0; | |
252b5132 | 2860 | } |
4111faa5 NC |
2861 | /* Until nothing further to relax. */ |
2862 | while (stretched && -- max_iterations); | |
2863 | ||
2864 | if (stretched) | |
2865 | as_fatal (_("Infinite loop encountered whilst attempting to compute the addresses of symbols in section %s"), | |
2866 | segment_name (segment)); | |
2867 | } | |
252b5132 | 2868 | |
e46d99eb AM |
2869 | for (fragP = segment_frag_root; fragP; fragP = fragP->fr_next) |
2870 | if (fragP->last_fr_address != fragP->fr_address) | |
2871 | { | |
2872 | fragP->last_fr_address = fragP->fr_address; | |
2873 | ret = 1; | |
2874 | } | |
2875 | return ret; | |
efaf0ba4 | 2876 | } |
252b5132 | 2877 | |
252b5132 | 2878 | void |
d7342424 | 2879 | number_to_chars_bigendian (char *buf, valueT val, int n) |
252b5132 | 2880 | { |
937149dd | 2881 | if (n <= 0) |
252b5132 RH |
2882 | abort (); |
2883 | while (n--) | |
2884 | { | |
2885 | buf[n] = val & 0xff; | |
2886 | val >>= 8; | |
2887 | } | |
2888 | } | |
2889 | ||
2890 | void | |
d7342424 | 2891 | number_to_chars_littleendian (char *buf, valueT val, int n) |
252b5132 | 2892 | { |
937149dd | 2893 | if (n <= 0) |
252b5132 RH |
2894 | abort (); |
2895 | while (n--) | |
2896 | { | |
2897 | *buf++ = val & 0xff; | |
2898 | val >>= 8; | |
2899 | } | |
2900 | } | |
2901 | ||
2902 | void | |
d7342424 | 2903 | write_print_statistics (FILE *file) |
252b5132 | 2904 | { |
6d4d30bb | 2905 | fprintf (file, "fixups: %d\n", n_fixups); |
252b5132 RH |
2906 | } |
2907 | ||
efaf0ba4 | 2908 | /* For debugging. */ |
252b5132 RH |
2909 | extern int indent_level; |
2910 | ||
2911 | void | |
d7342424 | 2912 | print_fixup (fixS *fixp) |
252b5132 RH |
2913 | { |
2914 | indent_level = 1; | |
d2df793a NC |
2915 | fprintf (stderr, "fix "); |
2916 | fprintf_vma (stderr, (bfd_vma)((bfd_hostptr_t) fixp)); | |
2917 | fprintf (stderr, " %s:%d",fixp->fx_file, fixp->fx_line); | |
252b5132 RH |
2918 | if (fixp->fx_pcrel) |
2919 | fprintf (stderr, " pcrel"); | |
2920 | if (fixp->fx_pcrel_adjust) | |
2921 | fprintf (stderr, " pcrel_adjust=%d", fixp->fx_pcrel_adjust); | |
2922 | if (fixp->fx_im_disp) | |
2923 | { | |
2924 | #ifdef TC_NS32K | |
2925 | fprintf (stderr, " im_disp=%d", fixp->fx_im_disp); | |
2926 | #else | |
2927 | fprintf (stderr, " im_disp"); | |
2928 | #endif | |
2929 | } | |
2930 | if (fixp->fx_tcbit) | |
2931 | fprintf (stderr, " tcbit"); | |
2932 | if (fixp->fx_done) | |
2933 | fprintf (stderr, " done"); | |
d2df793a NC |
2934 | fprintf (stderr, "\n size=%d frag=", fixp->fx_size); |
2935 | fprintf_vma (stderr, (bfd_vma) ((bfd_hostptr_t) fixp->fx_frag)); | |
2936 | fprintf (stderr, " where=%ld offset=%lx addnumber=%lx", | |
2937 | (long) fixp->fx_where, | |
0af1713e AM |
2938 | (unsigned long) fixp->fx_offset, |
2939 | (unsigned long) fixp->fx_addnumber); | |
252b5132 RH |
2940 | fprintf (stderr, "\n %s (%d)", bfd_get_reloc_code_name (fixp->fx_r_type), |
2941 | fixp->fx_r_type); | |
252b5132 RH |
2942 | if (fixp->fx_addsy) |
2943 | { | |
2944 | fprintf (stderr, "\n +<"); | |
2945 | print_symbol_value_1 (stderr, fixp->fx_addsy); | |
2946 | fprintf (stderr, ">"); | |
2947 | } | |
2948 | if (fixp->fx_subsy) | |
2949 | { | |
2950 | fprintf (stderr, "\n -<"); | |
2951 | print_symbol_value_1 (stderr, fixp->fx_subsy); | |
2952 | fprintf (stderr, ">"); | |
2953 | } | |
2954 | fprintf (stderr, "\n"); | |
2955 | #ifdef TC_FIX_DATA_PRINT | |
2956 | TC_FIX_DATA_PRINT (stderr, fixp); | |
2957 | #endif | |
2958 | } |