Commit | Line | Data |
---|---|---|
252b5132 | 1 | /* write.c - emit .o file |
219d1afa | 2 | Copyright (C) 1986-2018 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 | { | |
62a02d25 L |
438 | case rs_space_nop: |
439 | goto skip_align; | |
252b5132 RH |
440 | case rs_align: |
441 | case rs_align_code: | |
0a9ef439 | 442 | case rs_align_test: |
252b5132 RH |
443 | case rs_org: |
444 | case rs_space: | |
445 | #ifdef HANDLE_ALIGN | |
446 | HANDLE_ALIGN (fragP); | |
447 | #endif | |
62a02d25 | 448 | skip_align: |
252b5132 RH |
449 | know (fragP->fr_next != NULL); |
450 | fragP->fr_offset = (fragP->fr_next->fr_address | |
451 | - fragP->fr_address | |
452 | - fragP->fr_fix) / fragP->fr_var; | |
453 | if (fragP->fr_offset < 0) | |
454 | { | |
14ad458a | 455 | as_bad_where (fragP->fr_file, fragP->fr_line, |
8f065d3b | 456 | _("attempt to .org/.space/.nops backwards? (%ld)"), |
14ad458a | 457 | (long) fragP->fr_offset); |
3f3cdb03 | 458 | fragP->fr_offset = 0; |
252b5132 | 459 | } |
62a02d25 L |
460 | if (fragP->fr_type == rs_space_nop) |
461 | fragP->fr_type = rs_fill_nop; | |
462 | else | |
463 | fragP->fr_type = rs_fill; | |
252b5132 RH |
464 | break; |
465 | ||
466 | case rs_fill: | |
62a02d25 | 467 | case rs_fill_nop: |
252b5132 RH |
468 | break; |
469 | ||
470 | case rs_leb128: | |
471 | { | |
472 | valueT value = S_GET_VALUE (fragP->fr_symbol); | |
473 | int size; | |
474 | ||
ba8826a8 AO |
475 | if (!S_IS_DEFINED (fragP->fr_symbol)) |
476 | { | |
477 | as_bad_where (fragP->fr_file, fragP->fr_line, | |
478 | _("leb128 operand is an undefined symbol: %s"), | |
479 | S_GET_NAME (fragP->fr_symbol)); | |
480 | } | |
481 | ||
252b5132 RH |
482 | size = output_leb128 (fragP->fr_literal + fragP->fr_fix, value, |
483 | fragP->fr_subtype); | |
484 | ||
485 | fragP->fr_fix += size; | |
486 | fragP->fr_type = rs_fill; | |
487 | fragP->fr_var = 0; | |
488 | fragP->fr_offset = 0; | |
489 | fragP->fr_symbol = NULL; | |
490 | } | |
491 | break; | |
492 | ||
493 | case rs_cfa: | |
494 | eh_frame_convert_frag (fragP); | |
495 | break; | |
496 | ||
220e750f RH |
497 | case rs_dwarf2dbg: |
498 | dwarf2dbg_convert_frag (fragP); | |
499 | break; | |
500 | ||
252b5132 | 501 | case rs_machine_dependent: |
252b5132 | 502 | md_convert_frag (stdoutput, sec, fragP); |
252b5132 | 503 | |
9c2799c2 | 504 | gas_assert (fragP->fr_next == NULL |
252b5132 RH |
505 | || ((offsetT) (fragP->fr_next->fr_address - fragP->fr_address) |
506 | == fragP->fr_fix)); | |
507 | ||
efaf0ba4 NC |
508 | /* After md_convert_frag, we make the frag into a ".space 0". |
509 | md_convert_frag() should set up any fixSs and constants | |
510 | required. */ | |
252b5132 RH |
511 | frag_wane (fragP); |
512 | break; | |
513 | ||
514 | #ifndef WORKING_DOT_WORD | |
515 | case rs_broken_word: | |
516 | { | |
517 | struct broken_word *lie; | |
518 | ||
519 | if (fragP->fr_subtype) | |
520 | { | |
521 | fragP->fr_fix += md_short_jump_size; | |
522 | for (lie = (struct broken_word *) (fragP->fr_symbol); | |
523 | lie && lie->dispfrag == fragP; | |
524 | lie = lie->next_broken_word) | |
525 | if (lie->added == 1) | |
526 | fragP->fr_fix += md_long_jump_size; | |
527 | } | |
528 | frag_wane (fragP); | |
529 | } | |
530 | break; | |
531 | #endif | |
532 | ||
533 | default: | |
534 | BAD_CASE (fragP->fr_type); | |
535 | break; | |
536 | } | |
09b935ac AM |
537 | #ifdef md_frag_check |
538 | md_frag_check (fragP); | |
539 | #endif | |
252b5132 RH |
540 | } |
541 | ||
32638454 AM |
542 | struct relax_seg_info |
543 | { | |
544 | int pass; | |
545 | int changed; | |
546 | }; | |
d7342424 | 547 | |
252b5132 | 548 | static void |
32638454 | 549 | relax_seg (bfd *abfd ATTRIBUTE_UNUSED, asection *sec, void *xxx) |
e46d99eb AM |
550 | { |
551 | segment_info_type *seginfo = seg_info (sec); | |
32638454 | 552 | struct relax_seg_info *info = (struct relax_seg_info *) xxx; |
e46d99eb AM |
553 | |
554 | if (seginfo && seginfo->frchainP | |
32638454 AM |
555 | && relax_segment (seginfo->frchainP->frch_root, sec, info->pass)) |
556 | info->changed = 1; | |
e46d99eb AM |
557 | } |
558 | ||
e46d99eb | 559 | static void |
e7ff5c73 | 560 | size_seg (bfd *abfd, asection *sec, void *xxx ATTRIBUTE_UNUSED) |
252b5132 RH |
561 | { |
562 | flagword flags; | |
563 | fragS *fragp; | |
564 | segment_info_type *seginfo; | |
565 | int x; | |
566 | valueT size, newsize; | |
567 | ||
568 | subseg_change (sec, 0); | |
569 | ||
252b5132 RH |
570 | seginfo = seg_info (sec); |
571 | if (seginfo && seginfo->frchainP) | |
572 | { | |
252b5132 RH |
573 | for (fragp = seginfo->frchainP->frch_root; fragp; fragp = fragp->fr_next) |
574 | cvt_frag_to_fill (sec, fragp); | |
575 | for (fragp = seginfo->frchainP->frch_root; | |
576 | fragp->fr_next; | |
577 | fragp = fragp->fr_next) | |
efaf0ba4 NC |
578 | /* Walk to last elt. */ |
579 | ; | |
252b5132 RH |
580 | size = fragp->fr_address + fragp->fr_fix; |
581 | } | |
582 | else | |
583 | size = 0; | |
584 | ||
e46d99eb | 585 | flags = bfd_get_section_flags (abfd, sec); |
f3d2b04b KT |
586 | if (size == 0 && bfd_get_section_size (sec) != 0 && |
587 | (flags & SEC_HAS_CONTENTS) != 0) | |
588 | return; | |
e46d99eb | 589 | |
252b5132 RH |
590 | if (size > 0 && ! seginfo->bss) |
591 | flags |= SEC_HAS_CONTENTS; | |
592 | ||
e5435dec | 593 | flags &= ~SEC_RELOC; |
252b5132 | 594 | x = bfd_set_section_flags (abfd, sec, flags); |
9c2799c2 | 595 | gas_assert (x); |
252b5132 | 596 | |
2edb36e7 NC |
597 | /* If permitted, allow the backend to pad out the section |
598 | to some alignment boundary. */ | |
599 | if (do_not_pad_sections_to_alignment) | |
600 | newsize = size; | |
601 | else | |
602 | newsize = md_section_align (sec, size); | |
252b5132 | 603 | x = bfd_set_section_size (abfd, sec, newsize); |
9c2799c2 | 604 | gas_assert (x); |
252b5132 RH |
605 | |
606 | /* If the size had to be rounded up, add some padding in the last | |
607 | non-empty frag. */ | |
9c2799c2 | 608 | gas_assert (newsize >= size); |
252b5132 RH |
609 | if (size != newsize) |
610 | { | |
611 | fragS *last = seginfo->frchainP->frch_last; | |
612 | fragp = seginfo->frchainP->frch_root; | |
613 | while (fragp->fr_next != last) | |
614 | fragp = fragp->fr_next; | |
615 | last->fr_address = size; | |
18e1d487 AM |
616 | if ((newsize - size) % fragp->fr_var == 0) |
617 | fragp->fr_offset += (newsize - size) / fragp->fr_var; | |
618 | else | |
619 | /* If we hit this abort, it's likely due to subsegs_finish not | |
620 | providing sufficient alignment on the last frag, and the | |
621 | machine dependent code using alignment frags with fr_var | |
622 | greater than 1. */ | |
623 | abort (); | |
252b5132 RH |
624 | } |
625 | ||
626 | #ifdef tc_frob_section | |
627 | tc_frob_section (sec); | |
628 | #endif | |
629 | #ifdef obj_frob_section | |
630 | obj_frob_section (sec); | |
631 | #endif | |
632 | } | |
633 | ||
634 | #ifdef DEBUG2 | |
635 | static void | |
988392e2 | 636 | dump_section_relocs (bfd *abfd ATTRIBUTE_UNUSED, asection *sec, FILE *stream) |
252b5132 | 637 | { |
252b5132 RH |
638 | segment_info_type *seginfo = seg_info (sec); |
639 | fixS *fixp = seginfo->fix_root; | |
640 | ||
641 | if (!fixp) | |
642 | return; | |
643 | ||
644 | fprintf (stream, "sec %s relocs:\n", sec->name); | |
645 | while (fixp) | |
646 | { | |
647 | symbolS *s = fixp->fx_addsy; | |
e723ef7c ILT |
648 | |
649 | fprintf (stream, " %08lx: type %d ", (unsigned long) fixp, | |
650 | (int) fixp->fx_r_type); | |
651 | if (s == NULL) | |
652 | fprintf (stream, "no sym\n"); | |
653 | else | |
252b5132 | 654 | { |
e723ef7c ILT |
655 | print_symbol_value_1 (stream, s); |
656 | fprintf (stream, "\n"); | |
252b5132 | 657 | } |
252b5132 RH |
658 | fixp = fixp->fx_next; |
659 | } | |
660 | } | |
661 | #else | |
662 | #define dump_section_relocs(ABFD,SEC,STREAM) ((void) 0) | |
663 | #endif | |
664 | ||
665 | #ifndef EMIT_SECTION_SYMBOLS | |
666 | #define EMIT_SECTION_SYMBOLS 1 | |
667 | #endif | |
668 | ||
05e9452c AM |
669 | /* Resolve U.A.OFFSET_SYM and U.A.SYM fields of RELOC_LIST entries, |
670 | and check for validity. Convert RELOC_LIST from using U.A fields | |
671 | to U.B fields. */ | |
672 | static void | |
673 | resolve_reloc_expr_symbols (void) | |
674 | { | |
080f9e4f | 675 | bfd_vma addr_mask = 1; |
05e9452c AM |
676 | struct reloc_list *r; |
677 | ||
080f9e4f MR |
678 | /* Avoid a shift by the width of type. */ |
679 | addr_mask <<= bfd_arch_bits_per_address (stdoutput) - 1; | |
680 | addr_mask <<= 1; | |
681 | addr_mask -= 1; | |
682 | ||
05e9452c AM |
683 | for (r = reloc_list; r; r = r->next) |
684 | { | |
080f9e4f | 685 | reloc_howto_type *howto = r->u.a.howto; |
05e9452c AM |
686 | expressionS *symval; |
687 | symbolS *sym; | |
688 | bfd_vma offset, addend; | |
689 | asection *sec; | |
05e9452c AM |
690 | |
691 | resolve_symbol_value (r->u.a.offset_sym); | |
692 | symval = symbol_get_value_expression (r->u.a.offset_sym); | |
693 | ||
694 | offset = 0; | |
695 | sym = NULL; | |
696 | if (symval->X_op == O_constant) | |
697 | sym = r->u.a.offset_sym; | |
698 | else if (symval->X_op == O_symbol) | |
699 | { | |
700 | sym = symval->X_add_symbol; | |
701 | offset = symval->X_add_number; | |
702 | symval = symbol_get_value_expression (symval->X_add_symbol); | |
703 | } | |
704 | if (sym == NULL | |
705 | || symval->X_op != O_constant | |
706 | || (sec = S_GET_SEGMENT (sym)) == NULL | |
707 | || !SEG_NORMAL (sec)) | |
708 | { | |
709 | as_bad_where (r->file, r->line, _("invalid offset expression")); | |
710 | sec = NULL; | |
711 | } | |
712 | else | |
713 | offset += S_GET_VALUE (sym); | |
714 | ||
715 | sym = NULL; | |
716 | addend = r->u.a.addend; | |
717 | if (r->u.a.sym != NULL) | |
718 | { | |
719 | resolve_symbol_value (r->u.a.sym); | |
720 | symval = symbol_get_value_expression (r->u.a.sym); | |
721 | if (symval->X_op == O_constant) | |
722 | sym = r->u.a.sym; | |
723 | else if (symval->X_op == O_symbol) | |
724 | { | |
725 | sym = symval->X_add_symbol; | |
726 | addend += symval->X_add_number; | |
727 | symval = symbol_get_value_expression (symval->X_add_symbol); | |
728 | } | |
729 | if (symval->X_op != O_constant) | |
730 | { | |
731 | as_bad_where (r->file, r->line, _("invalid reloc expression")); | |
732 | sec = NULL; | |
733 | } | |
2578f2f3 | 734 | else if (sym != NULL && sec != NULL) |
7230378d | 735 | { |
080f9e4f MR |
736 | /* Convert relocs against local symbols to refer to the |
737 | corresponding section symbol plus offset instead. Keep | |
738 | PC-relative relocs of the REL variety intact though to | |
739 | prevent the offset from overflowing the relocated field, | |
740 | unless it has enough bits to cover the whole address | |
741 | space. */ | |
742 | if (S_IS_LOCAL (sym) && !symbol_section_p (sym) | |
d6101ac2 MR |
743 | && (sec->use_rela_p |
744 | || (howto->partial_inplace | |
745 | && (!howto->pc_relative | |
746 | || howto->src_mask == addr_mask)))) | |
7230378d AM |
747 | { |
748 | asection *symsec = S_GET_SEGMENT (sym); | |
749 | if (!(((symsec->flags & SEC_MERGE) != 0 | |
750 | && addend != 0) | |
751 | || (symsec->flags & SEC_THREAD_LOCAL) != 0)) | |
752 | { | |
753 | addend += S_GET_VALUE (sym); | |
754 | sym = section_symbol (symsec); | |
755 | } | |
756 | } | |
757 | symbol_mark_used_in_reloc (sym); | |
758 | } | |
05e9452c AM |
759 | } |
760 | if (sym == NULL) | |
761 | { | |
762 | if (abs_section_sym == NULL) | |
763 | abs_section_sym = section_symbol (absolute_section); | |
764 | sym = abs_section_sym; | |
765 | } | |
766 | ||
05e9452c AM |
767 | r->u.b.sec = sec; |
768 | r->u.b.s = symbol_get_bfdsym (sym); | |
769 | r->u.b.r.sym_ptr_ptr = &r->u.b.s; | |
770 | r->u.b.r.address = offset; | |
771 | r->u.b.r.addend = addend; | |
772 | r->u.b.r.howto = howto; | |
773 | } | |
774 | } | |
775 | ||
df44284e AM |
776 | /* This pass over fixups decides whether symbols can be replaced with |
777 | section symbols. */ | |
778 | ||
252b5132 | 779 | static void |
d7342424 KH |
780 | adjust_reloc_syms (bfd *abfd ATTRIBUTE_UNUSED, |
781 | asection *sec, | |
e7ff5c73 | 782 | void *xxx ATTRIBUTE_UNUSED) |
252b5132 RH |
783 | { |
784 | segment_info_type *seginfo = seg_info (sec); | |
785 | fixS *fixp; | |
786 | ||
787 | if (seginfo == NULL) | |
788 | return; | |
789 | ||
790 | dump_section_relocs (abfd, sec, stderr); | |
791 | ||
792 | for (fixp = seginfo->fix_root; fixp; fixp = fixp->fx_next) | |
793 | if (fixp->fx_done) | |
efaf0ba4 NC |
794 | /* Ignore it. */ |
795 | ; | |
252b5132 RH |
796 | else if (fixp->fx_addsy) |
797 | { | |
798 | symbolS *sym; | |
799 | asection *symsec; | |
800 | ||
801 | #ifdef DEBUG5 | |
802 | fprintf (stderr, "\n\nadjusting fixup:\n"); | |
803 | print_fixup (fixp); | |
804 | #endif | |
805 | ||
806 | sym = fixp->fx_addsy; | |
807 | ||
808 | /* All symbols should have already been resolved at this | |
809 | point. It is possible to see unresolved expression | |
810 | symbols, though, since they are not in the regular symbol | |
811 | table. */ | |
df44284e | 812 | resolve_symbol_value (sym); |
efaf0ba4 | 813 | |
49309057 | 814 | if (fixp->fx_subsy != NULL) |
6386f3a7 | 815 | resolve_symbol_value (fixp->fx_subsy); |
252b5132 | 816 | |
60938e80 L |
817 | /* If this symbol is equated to an undefined or common symbol, |
818 | convert the fixup to being against that symbol. */ | |
b4b24b79 AM |
819 | while (symbol_equated_reloc_p (sym) |
820 | || S_IS_WEAKREFR (sym)) | |
252b5132 | 821 | { |
b4b24b79 AM |
822 | symbolS *newsym = symbol_get_value_expression (sym)->X_add_symbol; |
823 | if (sym == newsym) | |
824 | break; | |
49309057 | 825 | fixp->fx_offset += symbol_get_value_expression (sym)->X_add_number; |
b4b24b79 AM |
826 | fixp->fx_addsy = newsym; |
827 | sym = newsym; | |
252b5132 RH |
828 | } |
829 | ||
df44284e | 830 | if (symbol_mri_common_p (sym)) |
252b5132 | 831 | { |
b4b24b79 AM |
832 | fixp->fx_offset += S_GET_VALUE (sym); |
833 | fixp->fx_addsy = symbol_get_value_expression (sym)->X_add_symbol; | |
df44284e | 834 | continue; |
252b5132 RH |
835 | } |
836 | ||
a161fe53 AM |
837 | /* If the symbol is undefined, common, weak, or global (ELF |
838 | shared libs), we can't replace it with the section symbol. */ | |
ae6063d4 | 839 | if (S_FORCE_RELOC (fixp->fx_addsy, 1)) |
a161fe53 AM |
840 | continue; |
841 | ||
842 | /* Is there some other (target cpu dependent) reason we can't adjust | |
843 | this one? (E.g. relocations involving function addresses on | |
844 | the PA. */ | |
845 | #ifdef tc_fix_adjustable | |
846 | if (! tc_fix_adjustable (fixp)) | |
847 | continue; | |
848 | #endif | |
849 | ||
850 | /* Since we're reducing to section symbols, don't attempt to reduce | |
851 | anything that's already using one. */ | |
852 | if (symbol_section_p (sym)) | |
853 | continue; | |
854 | ||
252b5132 | 855 | symsec = S_GET_SEGMENT (sym); |
252b5132 RH |
856 | if (symsec == NULL) |
857 | abort (); | |
efaf0ba4 | 858 | |
a841bdf5 AM |
859 | if (bfd_is_abs_section (symsec) |
860 | || symsec == reg_section) | |
252b5132 | 861 | { |
a161fe53 | 862 | /* The fixup_segment routine normally will not use this |
b4b24b79 | 863 | symbol in a relocation. */ |
df44284e | 864 | continue; |
252b5132 RH |
865 | } |
866 | ||
7565ed77 | 867 | /* Don't try to reduce relocs which refer to non-local symbols |
b4b24b79 AM |
868 | in .linkonce sections. It can lead to confusion when a |
869 | debugging section refers to a .linkonce section. I hope | |
870 | this will always be correct. */ | |
7565ed77 | 871 | if (symsec != sec && ! S_IS_LOCAL (sym)) |
252b5132 | 872 | { |
a161fe53 AM |
873 | if ((symsec->flags & SEC_LINK_ONCE) != 0 |
874 | || (IS_ELF | |
875 | /* The GNU toolchain uses an extension for ELF: a | |
876 | section beginning with the magic string | |
877 | .gnu.linkonce is a linkonce section. */ | |
878 | && strncmp (segment_name (symsec), ".gnu.linkonce", | |
879 | sizeof ".gnu.linkonce" - 1) == 0)) | |
880 | continue; | |
252b5132 | 881 | } |
f7460f5f JJ |
882 | |
883 | /* Never adjust a reloc against local symbol in a merge section | |
884 | with non-zero addend. */ | |
5045ec7a AM |
885 | if ((symsec->flags & SEC_MERGE) != 0 |
886 | && (fixp->fx_offset != 0 || fixp->fx_subsy != NULL)) | |
a161fe53 | 887 | continue; |
13ae64f3 JJ |
888 | |
889 | /* Never adjust a reloc against TLS local symbol. */ | |
df44284e | 890 | if ((symsec->flags & SEC_THREAD_LOCAL) != 0) |
a161fe53 | 891 | continue; |
252b5132 | 892 | |
a161fe53 | 893 | /* We refetch the segment when calling section_symbol, rather |
252b5132 | 894 | than using symsec, because S_GET_VALUE may wind up changing |
efaf0ba4 | 895 | the section when it calls resolve_symbol_value. */ |
252b5132 RH |
896 | fixp->fx_offset += S_GET_VALUE (sym); |
897 | fixp->fx_addsy = section_symbol (S_GET_SEGMENT (sym)); | |
e723ef7c ILT |
898 | #ifdef DEBUG5 |
899 | fprintf (stderr, "\nadjusted fixup:\n"); | |
900 | print_fixup (fixp); | |
901 | #endif | |
252b5132 | 902 | } |
252b5132 RH |
903 | |
904 | dump_section_relocs (abfd, sec, stderr); | |
905 | } | |
906 | ||
e7ff5c73 AM |
907 | /* fixup_segment() |
908 | ||
909 | Go through all the fixS's in a segment and see which ones can be | |
910 | handled now. (These consist of fixS where we have since discovered | |
911 | the value of a symbol, or the address of the frag involved.) | |
912 | For each one, call md_apply_fix to put the fix into the frag data. | |
89d67ed9 AM |
913 | Ones that we couldn't completely handle here will be output later |
914 | by emit_relocations. */ | |
e7ff5c73 | 915 | |
89d67ed9 | 916 | static void |
e7ff5c73 AM |
917 | fixup_segment (fixS *fixP, segT this_segment) |
918 | { | |
e7ff5c73 AM |
919 | valueT add_number; |
920 | fragS *fragP; | |
921 | segT add_symbol_segment = absolute_section; | |
922 | ||
923 | if (fixP != NULL && abs_section_sym == NULL) | |
924 | abs_section_sym = section_symbol (absolute_section); | |
925 | ||
926 | /* If the linker is doing the relaxing, we must not do any fixups. | |
927 | ||
928 | Well, strictly speaking that's not true -- we could do any that | |
929 | are PC-relative and don't cross regions that could change size. | |
930 | And for the i960 we might be able to turn callx/callj into bal | |
931 | anyways in cases where we know the maximum displacement. */ | |
932 | if (linkrelax && TC_LINKRELAX_FIXUP (this_segment)) | |
933 | { | |
934 | for (; fixP; fixP = fixP->fx_next) | |
935 | if (!fixP->fx_done) | |
936 | { | |
937 | if (fixP->fx_addsy == NULL) | |
938 | { | |
939 | /* There was no symbol required by this relocation. | |
940 | However, BFD doesn't really handle relocations | |
941 | without symbols well. So fake up a local symbol in | |
942 | the absolute section. */ | |
943 | fixP->fx_addsy = abs_section_sym; | |
944 | } | |
945 | symbol_mark_used_in_reloc (fixP->fx_addsy); | |
946 | if (fixP->fx_subsy != NULL) | |
947 | symbol_mark_used_in_reloc (fixP->fx_subsy); | |
e7ff5c73 | 948 | } |
89d67ed9 | 949 | return; |
e7ff5c73 AM |
950 | } |
951 | ||
952 | for (; fixP; fixP = fixP->fx_next) | |
953 | { | |
954 | #ifdef DEBUG5 | |
955 | fprintf (stderr, "\nprocessing fixup:\n"); | |
956 | print_fixup (fixP); | |
957 | #endif | |
958 | ||
959 | fragP = fixP->fx_frag; | |
960 | know (fragP); | |
961 | #ifdef TC_VALIDATE_FIX | |
962 | TC_VALIDATE_FIX (fixP, this_segment, skip); | |
963 | #endif | |
964 | add_number = fixP->fx_offset; | |
965 | ||
e7ff5c73 AM |
966 | if (fixP->fx_addsy != NULL) |
967 | add_symbol_segment = S_GET_SEGMENT (fixP->fx_addsy); | |
968 | ||
969 | if (fixP->fx_subsy != NULL) | |
970 | { | |
971 | segT sub_symbol_segment; | |
972 | resolve_symbol_value (fixP->fx_subsy); | |
973 | sub_symbol_segment = S_GET_SEGMENT (fixP->fx_subsy); | |
974 | if (fixP->fx_addsy != NULL | |
975 | && sub_symbol_segment == add_symbol_segment | |
c969da64 RS |
976 | && !S_FORCE_RELOC (fixP->fx_addsy, 0) |
977 | && !S_FORCE_RELOC (fixP->fx_subsy, 0) | |
e7ff5c73 AM |
978 | && !TC_FORCE_RELOCATION_SUB_SAME (fixP, add_symbol_segment)) |
979 | { | |
980 | add_number += S_GET_VALUE (fixP->fx_addsy); | |
981 | add_number -= S_GET_VALUE (fixP->fx_subsy); | |
982 | fixP->fx_offset = add_number; | |
983 | fixP->fx_addsy = NULL; | |
984 | fixP->fx_subsy = NULL; | |
985 | #ifdef TC_M68K | |
986 | /* See the comment below about 68k weirdness. */ | |
987 | fixP->fx_pcrel = 0; | |
988 | #endif | |
989 | } | |
990 | else if (sub_symbol_segment == absolute_section | |
c969da64 | 991 | && !S_FORCE_RELOC (fixP->fx_subsy, 0) |
9a97a5d7 | 992 | && !TC_FORCE_RELOCATION_SUB_ABS (fixP, add_symbol_segment)) |
e7ff5c73 AM |
993 | { |
994 | add_number -= S_GET_VALUE (fixP->fx_subsy); | |
995 | fixP->fx_offset = add_number; | |
996 | fixP->fx_subsy = NULL; | |
997 | } | |
998 | else if (sub_symbol_segment == this_segment | |
c969da64 | 999 | && !S_FORCE_RELOC (fixP->fx_subsy, 0) |
5db484ff | 1000 | && !TC_FORCE_RELOCATION_SUB_LOCAL (fixP, add_symbol_segment)) |
e7ff5c73 AM |
1001 | { |
1002 | add_number -= S_GET_VALUE (fixP->fx_subsy); | |
1003 | fixP->fx_offset = (add_number + fixP->fx_dot_value | |
8e723a10 | 1004 | + fixP->fx_dot_frag->fr_address); |
e7ff5c73 AM |
1005 | |
1006 | /* Make it pc-relative. If the back-end code has not | |
1007 | selected a pc-relative reloc, cancel the adjustment | |
1008 | we do later on all pc-relative relocs. */ | |
1009 | if (0 | |
1010 | #ifdef TC_M68K | |
1011 | /* Do this for m68k even if it's already described | |
1012 | as pc-relative. On the m68k, an operand of | |
1013 | "pc@(foo-.-2)" should address "foo" in a | |
1014 | pc-relative mode. */ | |
1015 | || 1 | |
1016 | #endif | |
1017 | || !fixP->fx_pcrel) | |
1018 | add_number += MD_PCREL_FROM_SECTION (fixP, this_segment); | |
1019 | fixP->fx_subsy = NULL; | |
1020 | fixP->fx_pcrel = 1; | |
1021 | } | |
586ec8c1 | 1022 | else if (!TC_VALIDATE_FIX_SUB (fixP, add_symbol_segment)) |
e7ff5c73 | 1023 | { |
9a97a5d7 AM |
1024 | if (!md_register_arithmetic |
1025 | && (add_symbol_segment == reg_section | |
1026 | || sub_symbol_segment == reg_section)) | |
1027 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
1028 | _("register value used as expression")); | |
1029 | else | |
1030 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
1031 | _("can't resolve `%s' {%s section} - `%s' {%s section}"), | |
1032 | fixP->fx_addsy ? S_GET_NAME (fixP->fx_addsy) : "0", | |
1033 | segment_name (add_symbol_segment), | |
1034 | S_GET_NAME (fixP->fx_subsy), | |
1035 | segment_name (sub_symbol_segment)); | |
e7ff5c73 | 1036 | } |
586ec8c1 NC |
1037 | else if (sub_symbol_segment != undefined_section |
1038 | && ! bfd_is_com_section (sub_symbol_segment) | |
1039 | && MD_APPLY_SYM_VALUE (fixP)) | |
1040 | add_number -= S_GET_VALUE (fixP->fx_subsy); | |
e7ff5c73 AM |
1041 | } |
1042 | ||
1043 | if (fixP->fx_addsy) | |
1044 | { | |
1fc5d88e | 1045 | if (add_symbol_segment == this_segment |
c969da64 | 1046 | && !S_FORCE_RELOC (fixP->fx_addsy, 0) |
e7ff5c73 AM |
1047 | && !TC_FORCE_RELOCATION_LOCAL (fixP)) |
1048 | { | |
1049 | /* This fixup was made when the symbol's segment was | |
1050 | SEG_UNKNOWN, but it is now in the local segment. | |
1051 | So we know how to do the address without relocation. */ | |
1052 | add_number += S_GET_VALUE (fixP->fx_addsy); | |
1053 | fixP->fx_offset = add_number; | |
1054 | if (fixP->fx_pcrel) | |
1055 | add_number -= MD_PCREL_FROM_SECTION (fixP, this_segment); | |
1056 | fixP->fx_addsy = NULL; | |
1057 | fixP->fx_pcrel = 0; | |
1058 | } | |
1059 | else if (add_symbol_segment == absolute_section | |
c969da64 | 1060 | && !S_FORCE_RELOC (fixP->fx_addsy, 0) |
e7ff5c73 AM |
1061 | && !TC_FORCE_RELOCATION_ABS (fixP)) |
1062 | { | |
1063 | add_number += S_GET_VALUE (fixP->fx_addsy); | |
1064 | fixP->fx_offset = add_number; | |
1065 | fixP->fx_addsy = NULL; | |
1066 | } | |
1067 | else if (add_symbol_segment != undefined_section | |
1068 | && ! bfd_is_com_section (add_symbol_segment) | |
1069 | && MD_APPLY_SYM_VALUE (fixP)) | |
1070 | add_number += S_GET_VALUE (fixP->fx_addsy); | |
1071 | } | |
1072 | ||
1073 | if (fixP->fx_pcrel) | |
1074 | { | |
1075 | add_number -= MD_PCREL_FROM_SECTION (fixP, this_segment); | |
1076 | if (!fixP->fx_done && fixP->fx_addsy == NULL) | |
1077 | { | |
1078 | /* There was no symbol required by this relocation. | |
1079 | However, BFD doesn't really handle relocations | |
1080 | without symbols well. So fake up a local symbol in | |
1081 | the absolute section. */ | |
1082 | fixP->fx_addsy = abs_section_sym; | |
1083 | } | |
1084 | } | |
1085 | ||
1086 | if (!fixP->fx_done) | |
1087 | md_apply_fix (fixP, &add_number, this_segment); | |
1088 | ||
1089 | if (!fixP->fx_done) | |
1090 | { | |
e7ff5c73 AM |
1091 | if (fixP->fx_addsy == NULL) |
1092 | fixP->fx_addsy = abs_section_sym; | |
1093 | symbol_mark_used_in_reloc (fixP->fx_addsy); | |
1094 | if (fixP->fx_subsy != NULL) | |
1095 | symbol_mark_used_in_reloc (fixP->fx_subsy); | |
1096 | } | |
1097 | ||
1098 | if (!fixP->fx_bit_fixP && !fixP->fx_no_overflow && fixP->fx_size != 0) | |
1099 | { | |
1100 | if (fixP->fx_size < sizeof (valueT)) | |
1101 | { | |
1102 | valueT mask; | |
1103 | ||
1104 | mask = 0; | |
1105 | mask--; /* Set all bits to one. */ | |
1106 | mask <<= fixP->fx_size * 8 - (fixP->fx_signed ? 1 : 0); | |
1107 | if ((add_number & mask) != 0 && (add_number & mask) != mask) | |
1108 | { | |
1109 | char buf[50], buf2[50]; | |
1110 | sprint_value (buf, fragP->fr_address + fixP->fx_where); | |
1111 | if (add_number > 1000) | |
1112 | sprint_value (buf2, add_number); | |
1113 | else | |
1114 | sprintf (buf2, "%ld", (long) add_number); | |
1115 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
992a06ee AM |
1116 | ngettext ("value of %s too large for field " |
1117 | "of %d byte at %s", | |
1118 | "value of %s too large for field " | |
1119 | "of %d bytes at %s", | |
1120 | fixP->fx_size), | |
e7ff5c73 AM |
1121 | buf2, fixP->fx_size, buf); |
1122 | } /* Generic error checking. */ | |
1123 | } | |
1124 | #ifdef WARN_SIGNED_OVERFLOW_WORD | |
1125 | /* Warn if a .word value is too large when treated as a signed | |
1126 | number. We already know it is not too negative. This is to | |
1127 | catch over-large switches generated by gcc on the 68k. */ | |
1128 | if (!flag_signed_overflow_ok | |
1129 | && fixP->fx_size == 2 | |
1130 | && add_number > 0x7fff) | |
1131 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
1132 | _("signed .word overflow; switch may be too large; %ld at 0x%lx"), | |
1133 | (long) add_number, | |
1134 | (long) (fragP->fr_address + fixP->fx_where)); | |
1135 | #endif | |
1136 | } /* Not a bit fix. */ | |
1137 | ||
1138 | #ifdef TC_VALIDATE_FIX | |
1139 | skip: ATTRIBUTE_UNUSED_LABEL | |
1140 | ; | |
1141 | #endif | |
1142 | #ifdef DEBUG5 | |
1143 | fprintf (stderr, "result:\n"); | |
1144 | print_fixup (fixP); | |
1145 | #endif | |
1146 | } /* For each fixS in this segment. */ | |
e7ff5c73 AM |
1147 | } |
1148 | ||
a161fe53 | 1149 | static void |
d7342424 KH |
1150 | fix_segment (bfd *abfd ATTRIBUTE_UNUSED, |
1151 | asection *sec, | |
e7ff5c73 | 1152 | void *xxx ATTRIBUTE_UNUSED) |
a161fe53 AM |
1153 | { |
1154 | segment_info_type *seginfo = seg_info (sec); | |
1155 | ||
1156 | fixup_segment (seginfo->fix_root, sec); | |
1157 | } | |
1158 | ||
e5435dec AM |
1159 | static void |
1160 | install_reloc (asection *sec, arelent *reloc, fragS *fragp, | |
3b4dbbbf | 1161 | const char *file, unsigned int line) |
e5435dec AM |
1162 | { |
1163 | char *err; | |
1164 | bfd_reloc_status_type s; | |
76d12939 AM |
1165 | asymbol *sym; |
1166 | ||
1167 | if (reloc->sym_ptr_ptr != NULL | |
1168 | && (sym = *reloc->sym_ptr_ptr) != NULL | |
1169 | && (sym->flags & BSF_KEEP) == 0 | |
1170 | && ((sym->flags & BSF_SECTION_SYM) == 0 | |
55f8b826 AM |
1171 | || (EMIT_SECTION_SYMBOLS |
1172 | && !bfd_is_abs_section (sym->section)))) | |
76d12939 | 1173 | as_bad_where (file, line, _("redefined symbol cannot be used on reloc")); |
e5435dec AM |
1174 | |
1175 | s = bfd_install_relocation (stdoutput, reloc, | |
1176 | fragp->fr_literal, fragp->fr_address, | |
1177 | sec, &err); | |
1178 | switch (s) | |
1179 | { | |
1180 | case bfd_reloc_ok: | |
1181 | break; | |
1182 | case bfd_reloc_overflow: | |
1183 | as_bad_where (file, line, _("relocation overflow")); | |
1184 | break; | |
1185 | case bfd_reloc_outofrange: | |
1186 | as_bad_where (file, line, _("relocation out of range")); | |
1187 | break; | |
1188 | default: | |
1189 | as_fatal (_("%s:%u: bad return from bfd_install_relocation: %x"), | |
1190 | file, line, s); | |
1191 | } | |
1192 | } | |
1193 | ||
7230378d AM |
1194 | static fragS * |
1195 | get_frag_for_reloc (fragS *last_frag, | |
1196 | const segment_info_type *seginfo, | |
1197 | const struct reloc_list *r) | |
1198 | { | |
1199 | fragS *f; | |
34bca508 | 1200 | |
7230378d AM |
1201 | for (f = last_frag; f != NULL; f = f->fr_next) |
1202 | if (f->fr_address <= r->u.b.r.address | |
1203 | && r->u.b.r.address < f->fr_address + f->fr_fix) | |
1204 | return f; | |
1205 | ||
1206 | for (f = seginfo->frchainP->frch_root; f != NULL; f = f->fr_next) | |
1207 | if (f->fr_address <= r->u.b.r.address | |
1208 | && r->u.b.r.address < f->fr_address + f->fr_fix) | |
1209 | return f; | |
1210 | ||
740bdc67 AM |
1211 | for (f = seginfo->frchainP->frch_root; f != NULL; f = f->fr_next) |
1212 | if (f->fr_address <= r->u.b.r.address | |
1213 | && r->u.b.r.address <= f->fr_address + f->fr_fix) | |
1214 | return f; | |
1215 | ||
7230378d AM |
1216 | as_bad_where (r->file, r->line, |
1217 | _("reloc not within (fixed part of) section")); | |
1218 | return NULL; | |
1219 | } | |
1220 | ||
252b5132 | 1221 | static void |
e7ff5c73 | 1222 | write_relocs (bfd *abfd, asection *sec, void *xxx ATTRIBUTE_UNUSED) |
252b5132 RH |
1223 | { |
1224 | segment_info_type *seginfo = seg_info (sec); | |
252b5132 | 1225 | unsigned int n; |
05e9452c | 1226 | struct reloc_list *my_reloc_list, **rp, *r; |
252b5132 RH |
1227 | arelent **relocs; |
1228 | fixS *fixp; | |
7230378d | 1229 | fragS *last_frag; |
252b5132 RH |
1230 | |
1231 | /* If seginfo is NULL, we did not create this section; don't do | |
1232 | anything with it. */ | |
1233 | if (seginfo == NULL) | |
1234 | return; | |
1235 | ||
252b5132 RH |
1236 | n = 0; |
1237 | for (fixp = seginfo->fix_root; fixp; fixp = fixp->fx_next) | |
e5435dec AM |
1238 | if (!fixp->fx_done) |
1239 | n++; | |
1240 | ||
1241 | #ifdef RELOC_EXPANSION_POSSIBLE | |
1242 | n *= MAX_RELOC_EXPANSION; | |
1243 | #endif | |
252b5132 | 1244 | |
05e9452c AM |
1245 | /* Extract relocs for this section from reloc_list. */ |
1246 | rp = &reloc_list; | |
1247 | my_reloc_list = NULL; | |
1248 | while ((r = *rp) != NULL) | |
1249 | { | |
1250 | if (r->u.b.sec == sec) | |
1251 | { | |
1252 | *rp = r->next; | |
1253 | r->next = my_reloc_list; | |
1254 | my_reloc_list = r; | |
1255 | n++; | |
1256 | } | |
1257 | else | |
1258 | rp = &r->next; | |
1259 | } | |
1260 | ||
add39d23 | 1261 | relocs = XCNEWVEC (arelent *, n); |
252b5132 | 1262 | |
7230378d AM |
1263 | n = 0; |
1264 | r = my_reloc_list; | |
1265 | last_frag = NULL; | |
252b5132 RH |
1266 | for (fixp = seginfo->fix_root; fixp != (fixS *) NULL; fixp = fixp->fx_next) |
1267 | { | |
d31f0f6d AM |
1268 | int fx_size, slack; |
1269 | offsetT loc; | |
7230378d AM |
1270 | arelent **reloc; |
1271 | #ifndef RELOC_EXPANSION_POSSIBLE | |
1272 | arelent *rel; | |
1273 | ||
1274 | reloc = &rel; | |
1275 | #endif | |
252b5132 RH |
1276 | |
1277 | if (fixp->fx_done) | |
e5435dec | 1278 | continue; |
252b5132 | 1279 | |
d31f0f6d AM |
1280 | fx_size = fixp->fx_size; |
1281 | slack = TC_FX_SIZE_SLACK (fixp); | |
1282 | if (slack > 0) | |
1283 | fx_size = fx_size > slack ? fx_size - slack : 0; | |
1284 | loc = fixp->fx_where + fx_size; | |
e5435dec | 1285 | if (slack >= 0 && loc > fixp->fx_frag->fr_fix) |
d31f0f6d AM |
1286 | as_bad_where (fixp->fx_file, fixp->fx_line, |
1287 | _("internal error: fixup not contained within frag")); | |
252b5132 | 1288 | |
e5435dec | 1289 | #ifndef RELOC_EXPANSION_POSSIBLE |
7230378d | 1290 | *reloc = tc_gen_reloc (sec, fixp); |
e5435dec | 1291 | #else |
7230378d AM |
1292 | reloc = tc_gen_reloc (sec, fixp); |
1293 | #endif | |
252b5132 | 1294 | |
7230378d AM |
1295 | while (*reloc) |
1296 | { | |
1297 | while (r != NULL && r->u.b.r.address < (*reloc)->address) | |
1298 | { | |
1299 | fragS *f = get_frag_for_reloc (last_frag, seginfo, r); | |
1300 | if (f != NULL) | |
1301 | { | |
1302 | last_frag = f; | |
1303 | relocs[n++] = &r->u.b.r; | |
1304 | install_reloc (sec, &r->u.b.r, f, r->file, r->line); | |
1305 | } | |
1306 | r = r->next; | |
1307 | } | |
1308 | relocs[n++] = *reloc; | |
1309 | install_reloc (sec, *reloc, fixp->fx_frag, | |
1310 | fixp->fx_file, fixp->fx_line); | |
1311 | #ifndef RELOC_EXPANSION_POSSIBLE | |
1312 | break; | |
1313 | #else | |
1314 | reloc++; | |
e5435dec | 1315 | #endif |
7230378d AM |
1316 | } |
1317 | } | |
d31f0f6d | 1318 | |
7230378d AM |
1319 | while (r != NULL) |
1320 | { | |
1321 | fragS *f = get_frag_for_reloc (last_frag, seginfo, r); | |
1322 | if (f != NULL) | |
1323 | { | |
1324 | last_frag = f; | |
1325 | relocs[n++] = &r->u.b.r; | |
1326 | install_reloc (sec, &r->u.b.r, f, r->file, r->line); | |
1327 | } | |
1328 | r = r->next; | |
252b5132 | 1329 | } |
252b5132 RH |
1330 | |
1331 | #ifdef DEBUG4 | |
1332 | { | |
1596988d | 1333 | unsigned int k, j, nsyms; |
252b5132 RH |
1334 | asymbol **sympp; |
1335 | sympp = bfd_get_outsymbols (stdoutput); | |
1336 | nsyms = bfd_get_symcount (stdoutput); | |
1596988d TG |
1337 | for (k = 0; k < n; k++) |
1338 | if (((*relocs[k]->sym_ptr_ptr)->flags & BSF_SECTION_SYM) == 0) | |
252b5132 RH |
1339 | { |
1340 | for (j = 0; j < nsyms; j++) | |
1596988d | 1341 | if (sympp[j] == *relocs[k]->sym_ptr_ptr) |
252b5132 RH |
1342 | break; |
1343 | if (j == nsyms) | |
1344 | abort (); | |
1345 | } | |
1346 | } | |
1347 | #endif | |
1348 | ||
1349 | if (n) | |
e5435dec AM |
1350 | { |
1351 | flagword flags = bfd_get_section_flags (abfd, sec); | |
1352 | flags |= SEC_RELOC; | |
1353 | bfd_set_section_flags (abfd, sec, flags); | |
1354 | bfd_set_reloc (stdoutput, sec, relocs, n); | |
1355 | } | |
252b5132 | 1356 | |
945a1a6b ILT |
1357 | #ifdef SET_SECTION_RELOCS |
1358 | SET_SECTION_RELOCS (sec, relocs, n); | |
1359 | #endif | |
1360 | ||
252b5132 RH |
1361 | #ifdef DEBUG3 |
1362 | { | |
1596988d TG |
1363 | unsigned int k; |
1364 | ||
252b5132 | 1365 | fprintf (stderr, "relocs for sec %s\n", sec->name); |
1596988d | 1366 | for (k = 0; k < n; k++) |
252b5132 | 1367 | { |
1596988d TG |
1368 | arelent *rel = relocs[k]; |
1369 | asymbol *s = *rel->sym_ptr_ptr; | |
988392e2 | 1370 | fprintf (stderr, " reloc %2d @%p off %4lx : sym %-10s addend %lx\n", |
1596988d TG |
1371 | k, rel, (unsigned long)rel->address, s->name, |
1372 | (unsigned long)rel->addend); | |
252b5132 RH |
1373 | } |
1374 | } | |
1375 | #endif | |
1376 | } | |
1377 | ||
0acf065b CC |
1378 | static int |
1379 | compress_frag (struct z_stream_s *strm, const char *contents, int in_size, | |
1380 | fragS **last_newf, struct obstack *ob) | |
1381 | { | |
1382 | int out_size; | |
1383 | int total_out_size = 0; | |
1384 | fragS *f = *last_newf; | |
1385 | char *next_out; | |
1386 | int avail_out; | |
1387 | ||
1388 | /* Call the compression routine repeatedly until it has finished | |
1389 | processing the frag. */ | |
1390 | while (in_size > 0) | |
1391 | { | |
1392 | /* Reserve all the space available in the current chunk. | |
1393 | If none is available, start a new frag. */ | |
1394 | avail_out = obstack_room (ob); | |
1395 | if (avail_out <= 0) | |
1396 | { | |
1397 | obstack_finish (ob); | |
1398 | f = frag_alloc (ob); | |
1399 | f->fr_type = rs_fill; | |
1400 | (*last_newf)->fr_next = f; | |
1401 | *last_newf = f; | |
1402 | avail_out = obstack_room (ob); | |
1403 | } | |
1404 | if (avail_out <= 0) | |
1405 | as_fatal (_("can't extend frag")); | |
1406 | next_out = obstack_next_free (ob); | |
1407 | obstack_blank_fast (ob, avail_out); | |
1408 | out_size = compress_data (strm, &contents, &in_size, | |
1409 | &next_out, &avail_out); | |
1410 | if (out_size < 0) | |
1411 | return -1; | |
1412 | ||
1413 | f->fr_fix += out_size; | |
1414 | total_out_size += out_size; | |
1415 | ||
1416 | /* Return unused space. */ | |
1417 | if (avail_out > 0) | |
1418 | obstack_blank_fast (ob, -avail_out); | |
1419 | } | |
1420 | ||
1421 | return total_out_size; | |
1422 | } | |
1423 | ||
1424 | static void | |
1425 | compress_debug (bfd *abfd, asection *sec, void *xxx ATTRIBUTE_UNUSED) | |
1426 | { | |
1427 | segment_info_type *seginfo = seg_info (sec); | |
1428 | fragS *f; | |
1429 | fragS *first_newf; | |
1430 | fragS *last_newf; | |
1431 | struct obstack *ob = &seginfo->frchainP->frch_obstack; | |
1432 | bfd_size_type uncompressed_size = (bfd_size_type) sec->size; | |
1433 | bfd_size_type compressed_size; | |
1434 | const char *section_name; | |
1435 | char *compressed_name; | |
1436 | char *header; | |
1437 | struct z_stream_s *strm; | |
1438 | int x; | |
4a114e3e | 1439 | flagword flags = bfd_get_section_flags (abfd, sec); |
151411f8 | 1440 | unsigned int header_size, compression_header_size; |
0acf065b CC |
1441 | |
1442 | if (seginfo == NULL | |
6ac88ef3 | 1443 | || sec->size < 32 |
4a114e3e | 1444 | || (flags & (SEC_ALLOC | SEC_HAS_CONTENTS)) == SEC_ALLOC) |
0acf065b CC |
1445 | return; |
1446 | ||
1447 | section_name = bfd_get_section_name (stdoutput, sec); | |
1448 | if (strncmp (section_name, ".debug_", 7) != 0) | |
1449 | return; | |
1450 | ||
1451 | strm = compress_init (); | |
1452 | if (strm == NULL) | |
1453 | return; | |
1454 | ||
151411f8 | 1455 | if (flag_compress_debug == COMPRESS_DEBUG_GABI_ZLIB) |
dab394de | 1456 | { |
dab394de L |
1457 | compression_header_size |
1458 | = bfd_get_compression_header_size (stdoutput, NULL); | |
1459 | header_size = compression_header_size; | |
1460 | } | |
151411f8 | 1461 | else |
dab394de | 1462 | { |
dab394de L |
1463 | compression_header_size = 0; |
1464 | header_size = 12; | |
1465 | } | |
151411f8 | 1466 | |
dab394de | 1467 | /* Create a new frag to contain the compression header. */ |
0acf065b | 1468 | first_newf = frag_alloc (ob); |
151411f8 | 1469 | if (obstack_room (ob) < header_size) |
0acf065b | 1470 | first_newf = frag_alloc (ob); |
151411f8 | 1471 | if (obstack_room (ob) < header_size) |
992a06ee AM |
1472 | as_fatal (ngettext ("can't extend frag %lu char", |
1473 | "can't extend frag %lu chars", | |
1474 | (unsigned long) header_size), | |
1475 | (unsigned long) header_size); | |
0acf065b | 1476 | last_newf = first_newf; |
151411f8 | 1477 | obstack_blank_fast (ob, header_size); |
0acf065b | 1478 | last_newf->fr_type = rs_fill; |
151411f8 | 1479 | last_newf->fr_fix = header_size; |
0acf065b | 1480 | header = last_newf->fr_literal; |
151411f8 | 1481 | compressed_size = header_size; |
0acf065b CC |
1482 | |
1483 | /* Stream the frags through the compression engine, adding new frags | |
2b0f3761 | 1484 | as necessary to accommodate the compressed output. */ |
0acf065b CC |
1485 | for (f = seginfo->frchainP->frch_root; |
1486 | f; | |
1487 | f = f->fr_next) | |
1488 | { | |
1489 | offsetT fill_size; | |
1490 | char *fill_literal; | |
1491 | offsetT count; | |
1492 | int out_size; | |
1493 | ||
1494 | gas_assert (f->fr_type == rs_fill); | |
1495 | if (f->fr_fix) | |
1496 | { | |
1497 | out_size = compress_frag (strm, f->fr_literal, f->fr_fix, | |
1498 | &last_newf, ob); | |
1499 | if (out_size < 0) | |
1500 | return; | |
1501 | compressed_size += out_size; | |
1502 | } | |
1503 | fill_literal = f->fr_literal + f->fr_fix; | |
1504 | fill_size = f->fr_var; | |
1505 | count = f->fr_offset; | |
1506 | gas_assert (count >= 0); | |
1507 | if (fill_size && count) | |
1508 | { | |
1509 | while (count--) | |
1510 | { | |
1511 | out_size = compress_frag (strm, fill_literal, (int) fill_size, | |
1512 | &last_newf, ob); | |
1513 | if (out_size < 0) | |
1514 | return; | |
1515 | compressed_size += out_size; | |
1516 | } | |
1517 | } | |
1518 | } | |
1519 | ||
1520 | /* Flush the compression state. */ | |
1521 | for (;;) | |
1522 | { | |
1523 | int avail_out; | |
1524 | char *next_out; | |
1525 | int out_size; | |
1526 | ||
1527 | /* Reserve all the space available in the current chunk. | |
1528 | If none is available, start a new frag. */ | |
1529 | avail_out = obstack_room (ob); | |
1530 | if (avail_out <= 0) | |
1531 | { | |
1532 | fragS *newf; | |
1533 | ||
1534 | obstack_finish (ob); | |
1535 | newf = frag_alloc (ob); | |
1536 | newf->fr_type = rs_fill; | |
1537 | last_newf->fr_next = newf; | |
1538 | last_newf = newf; | |
1539 | avail_out = obstack_room (ob); | |
1540 | } | |
1541 | if (avail_out <= 0) | |
1542 | as_fatal (_("can't extend frag")); | |
1543 | next_out = obstack_next_free (ob); | |
1544 | obstack_blank_fast (ob, avail_out); | |
1545 | x = compress_finish (strm, &next_out, &avail_out, &out_size); | |
1546 | if (x < 0) | |
1547 | return; | |
1548 | ||
1549 | last_newf->fr_fix += out_size; | |
1550 | compressed_size += out_size; | |
1551 | ||
1552 | /* Return unused space. */ | |
1553 | if (avail_out > 0) | |
1554 | obstack_blank_fast (ob, -avail_out); | |
1555 | ||
1556 | if (x == 0) | |
1557 | break; | |
1558 | } | |
1559 | ||
b422eb49 L |
1560 | /* PR binutils/18087: If compression didn't make the section smaller, |
1561 | just keep it uncompressed. */ | |
317974f6 | 1562 | if (compressed_size >= uncompressed_size) |
273a4985 | 1563 | return; |
d94077e2 | 1564 | |
0acf065b CC |
1565 | /* Replace the uncompressed frag list with the compressed frag list. */ |
1566 | seginfo->frchainP->frch_root = first_newf; | |
1567 | seginfo->frchainP->frch_last = last_newf; | |
1568 | ||
1569 | /* Update the section size and its name. */ | |
151411f8 | 1570 | bfd_update_compression_header (abfd, (bfd_byte *) header, sec); |
0acf065b CC |
1571 | x = bfd_set_section_size (abfd, sec, compressed_size); |
1572 | gas_assert (x); | |
151411f8 L |
1573 | if (!compression_header_size) |
1574 | { | |
29a2809e | 1575 | compressed_name = concat (".z", section_name + 1, (char *) NULL); |
151411f8 L |
1576 | bfd_section_name (stdoutput, sec) = compressed_name; |
1577 | } | |
0acf065b CC |
1578 | } |
1579 | ||
62a02d25 L |
1580 | #ifndef md_generate_nops |
1581 | /* Genenerate COUNT bytes of no-op instructions to WHERE. A target | |
1582 | backend must override this with proper no-op instructions. */ | |
1583 | ||
1584 | static void | |
1585 | md_generate_nops (fragS *f ATTRIBUTE_UNUSED, | |
1586 | char *where ATTRIBUTE_UNUSED, | |
1587 | offsetT count ATTRIBUTE_UNUSED, | |
1588 | int control ATTRIBUTE_UNUSED) | |
1589 | { | |
8f065d3b | 1590 | as_bad (_("unimplemented .nops directive")); |
62a02d25 L |
1591 | } |
1592 | #endif | |
1593 | ||
252b5132 | 1594 | static void |
d7342424 KH |
1595 | write_contents (bfd *abfd ATTRIBUTE_UNUSED, |
1596 | asection *sec, | |
e7ff5c73 | 1597 | void *xxx ATTRIBUTE_UNUSED) |
252b5132 RH |
1598 | { |
1599 | segment_info_type *seginfo = seg_info (sec); | |
685736be | 1600 | addressT offset = 0; |
252b5132 RH |
1601 | fragS *f; |
1602 | ||
1603 | /* Write out the frags. */ | |
1604 | if (seginfo == NULL | |
efaf0ba4 | 1605 | || !(bfd_get_section_flags (abfd, sec) & SEC_HAS_CONTENTS)) |
252b5132 RH |
1606 | return; |
1607 | ||
1608 | for (f = seginfo->frchainP->frch_root; | |
1609 | f; | |
1610 | f = f->fr_next) | |
1611 | { | |
1612 | int x; | |
685736be | 1613 | addressT fill_size; |
252b5132 | 1614 | char *fill_literal; |
685736be | 1615 | offsetT count; |
252b5132 | 1616 | |
62a02d25 | 1617 | gas_assert (f->fr_type == rs_fill || f->fr_type == rs_fill_nop); |
252b5132 RH |
1618 | if (f->fr_fix) |
1619 | { | |
1620 | x = bfd_set_section_contents (stdoutput, sec, | |
1621 | f->fr_literal, (file_ptr) offset, | |
1622 | (bfd_size_type) f->fr_fix); | |
b34976b6 | 1623 | if (!x) |
992a06ee AM |
1624 | as_fatal (ngettext ("can't write %ld byte " |
1625 | "to section %s of %s: '%s'", | |
1626 | "can't write %ld bytes " | |
1627 | "to section %s of %s: '%s'", | |
1628 | (long) f->fr_fix), | |
1629 | (long) f->fr_fix, | |
1630 | sec->name, stdoutput->filename, | |
885afe7b | 1631 | bfd_errmsg (bfd_get_error ())); |
252b5132 RH |
1632 | offset += f->fr_fix; |
1633 | } | |
62a02d25 | 1634 | |
252b5132 RH |
1635 | fill_size = f->fr_var; |
1636 | count = f->fr_offset; | |
62a02d25 L |
1637 | fill_literal = f->fr_literal + f->fr_fix; |
1638 | ||
1639 | if (f->fr_type == rs_fill_nop) | |
1640 | { | |
1641 | gas_assert (count >= 0 && fill_size == 1); | |
1642 | if (count > 0) | |
1643 | { | |
1644 | char *buf = xmalloc (count); | |
1645 | md_generate_nops (f, buf, count, *fill_literal); | |
1646 | x = bfd_set_section_contents | |
1647 | (stdoutput, sec, buf, (file_ptr) offset, | |
1648 | (bfd_size_type) count); | |
1649 | if (!x) | |
1650 | as_fatal (ngettext ("can't fill %ld byte " | |
1651 | "in section %s of %s: '%s'", | |
1652 | "can't fill %ld bytes " | |
1653 | "in section %s of %s: '%s'", | |
1654 | (long) count), (long) count, | |
1655 | sec->name, stdoutput->filename, | |
1656 | bfd_errmsg (bfd_get_error ())); | |
1657 | offset += count; | |
1658 | free (buf); | |
1659 | } | |
1660 | continue; | |
1661 | } | |
1662 | ||
9c2799c2 | 1663 | gas_assert (count >= 0); |
252b5132 RH |
1664 | if (fill_size && count) |
1665 | { | |
1666 | char buf[256]; | |
efaf0ba4 | 1667 | if (fill_size > sizeof (buf)) |
252b5132 | 1668 | { |
efaf0ba4 | 1669 | /* Do it the old way. Can this ever happen? */ |
252b5132 RH |
1670 | while (count--) |
1671 | { | |
1672 | x = bfd_set_section_contents (stdoutput, sec, | |
1673 | fill_literal, | |
1674 | (file_ptr) offset, | |
1675 | (bfd_size_type) fill_size); | |
b34976b6 | 1676 | if (!x) |
992a06ee AM |
1677 | as_fatal (ngettext ("can't fill %ld byte " |
1678 | "in section %s of %s: '%s'", | |
1679 | "can't fill %ld bytes " | |
1680 | "in section %s of %s: '%s'", | |
1681 | (long) fill_size), | |
1682 | (long) fill_size, | |
1683 | sec->name, stdoutput->filename, | |
885afe7b | 1684 | bfd_errmsg (bfd_get_error ())); |
252b5132 RH |
1685 | offset += fill_size; |
1686 | } | |
1687 | } | |
1688 | else | |
1689 | { | |
1690 | /* Build a buffer full of fill objects and output it as | |
1691 | often as necessary. This saves on the overhead of | |
1692 | potentially lots of bfd_set_section_contents calls. */ | |
1693 | int n_per_buf, i; | |
1694 | if (fill_size == 1) | |
1695 | { | |
1696 | n_per_buf = sizeof (buf); | |
1697 | memset (buf, *fill_literal, n_per_buf); | |
1698 | } | |
1699 | else | |
1700 | { | |
1701 | char *bufp; | |
efaf0ba4 | 1702 | n_per_buf = sizeof (buf) / fill_size; |
252b5132 | 1703 | for (i = n_per_buf, bufp = buf; i; i--, bufp += fill_size) |
efaf0ba4 | 1704 | memcpy (bufp, fill_literal, fill_size); |
252b5132 RH |
1705 | } |
1706 | for (; count > 0; count -= n_per_buf) | |
1707 | { | |
1708 | n_per_buf = n_per_buf > count ? count : n_per_buf; | |
efaf0ba4 NC |
1709 | x = bfd_set_section_contents |
1710 | (stdoutput, sec, buf, (file_ptr) offset, | |
1711 | (bfd_size_type) n_per_buf * fill_size); | |
b34976b6 | 1712 | if (!x) |
992a06ee AM |
1713 | as_fatal (ngettext ("can't fill %ld byte " |
1714 | "in section %s of %s: '%s'", | |
1715 | "can't fill %ld bytes " | |
1716 | "in section %s of %s: '%s'", | |
1717 | (long) (n_per_buf * fill_size)), | |
1718 | (long) (n_per_buf * fill_size), | |
1719 | sec->name, stdoutput->filename, | |
a22429b9 | 1720 | bfd_errmsg (bfd_get_error ())); |
252b5132 RH |
1721 | offset += n_per_buf * fill_size; |
1722 | } | |
1723 | } | |
1724 | } | |
1725 | } | |
1726 | } | |
252b5132 | 1727 | |
252b5132 | 1728 | static void |
d7342424 | 1729 | merge_data_into_text (void) |
252b5132 | 1730 | { |
252b5132 RH |
1731 | seg_info (text_section)->frchainP->frch_last->fr_next = |
1732 | seg_info (data_section)->frchainP->frch_root; | |
1733 | seg_info (text_section)->frchainP->frch_last = | |
1734 | seg_info (data_section)->frchainP->frch_last; | |
1735 | seg_info (data_section)->frchainP = 0; | |
252b5132 | 1736 | } |
252b5132 | 1737 | |
252b5132 | 1738 | static void |
d7342424 | 1739 | set_symtab (void) |
252b5132 RH |
1740 | { |
1741 | int nsyms; | |
1742 | asymbol **asympp; | |
1743 | symbolS *symp; | |
b34976b6 | 1744 | bfd_boolean result; |
252b5132 RH |
1745 | |
1746 | /* Count symbols. We can't rely on a count made by the loop in | |
1747 | write_object_file, because *_frob_file may add a new symbol or | |
1748 | two. */ | |
1749 | nsyms = 0; | |
1750 | for (symp = symbol_rootP; symp; symp = symbol_next (symp)) | |
1751 | nsyms++; | |
1752 | ||
1753 | if (nsyms) | |
1754 | { | |
1755 | int i; | |
0e1a166b | 1756 | bfd_size_type amt = (bfd_size_type) nsyms * sizeof (asymbol *); |
252b5132 | 1757 | |
1e9cc1c2 | 1758 | asympp = (asymbol **) bfd_alloc (stdoutput, amt); |
252b5132 RH |
1759 | symp = symbol_rootP; |
1760 | for (i = 0; i < nsyms; i++, symp = symbol_next (symp)) | |
1761 | { | |
49309057 | 1762 | asympp[i] = symbol_get_bfdsym (symp); |
76d12939 AM |
1763 | if (asympp[i]->flags != BSF_SECTION_SYM |
1764 | || !(bfd_is_const_section (asympp[i]->section) | |
1765 | && asympp[i]->section->symbol == asympp[i])) | |
1766 | asympp[i]->flags |= BSF_KEEP; | |
49309057 | 1767 | symbol_mark_written (symp); |
252b5132 RH |
1768 | } |
1769 | } | |
1770 | else | |
1771 | asympp = 0; | |
1772 | result = bfd_set_symtab (stdoutput, asympp, nsyms); | |
9c2799c2 | 1773 | gas_assert (result); |
252b5132 RH |
1774 | symbol_table_frozen = 1; |
1775 | } | |
252b5132 RH |
1776 | |
1777 | /* Finish the subsegments. After every sub-segment, we fake an | |
2edb36e7 | 1778 | ".align ...". This conforms to BSD4.2 brain-damage. We then fake |
252b5132 RH |
1779 | ".fill 0" because that is the kind of frag that requires least |
1780 | thought. ".align" frags like to have a following frag since that | |
1781 | makes calculating their intended length trivial. */ | |
1782 | ||
1783 | #ifndef SUB_SEGMENT_ALIGN | |
18e1d487 | 1784 | #ifdef HANDLE_ALIGN |
436d9e46 | 1785 | /* The last subsegment gets an alignment corresponding to the alignment |
18e1d487 AM |
1786 | of the section. This allows proper nop-filling at the end of |
1787 | code-bearing sections. */ | |
1788 | #define SUB_SEGMENT_ALIGN(SEG, FRCHAIN) \ | |
9028d943 | 1789 | (!(FRCHAIN)->frch_next && subseg_text_p (SEG) \ |
2edb36e7 | 1790 | && !do_not_pad_sections_to_alignment \ |
9028d943 AM |
1791 | ? get_recorded_alignment (SEG) \ |
1792 | : 0) | |
18e1d487 | 1793 | #else |
18e1d487 | 1794 | #define SUB_SEGMENT_ALIGN(SEG, FRCHAIN) 0 |
252b5132 RH |
1795 | #endif |
1796 | #endif | |
1797 | ||
85024cd8 | 1798 | static void |
d98b0e2b | 1799 | subsegs_finish_section (asection *s) |
252b5132 RH |
1800 | { |
1801 | struct frchain *frchainP; | |
d98b0e2b TG |
1802 | segment_info_type *seginfo = seg_info (s); |
1803 | if (!seginfo) | |
1804 | return; | |
252b5132 | 1805 | |
d98b0e2b TG |
1806 | for (frchainP = seginfo->frchainP; |
1807 | frchainP != NULL; | |
1808 | frchainP = frchainP->frch_next) | |
252b5132 | 1809 | { |
93a24ba7 | 1810 | int alignment; |
0a9ef439 | 1811 | |
d98b0e2b | 1812 | subseg_set (s, frchainP->frch_subseg); |
381a1ab3 | 1813 | |
d98b0e2b TG |
1814 | /* This now gets called even if we had errors. In that case, |
1815 | any alignment is meaningless, and, moreover, will look weird | |
1816 | if we are generating a listing. */ | |
93a24ba7 MR |
1817 | if (had_errors ()) |
1818 | do_not_pad_sections_to_alignment = 1; | |
c9049d30 | 1819 | |
93a24ba7 MR |
1820 | alignment = SUB_SEGMENT_ALIGN (now_seg, frchainP); |
1821 | if ((bfd_get_section_flags (now_seg->owner, now_seg) & SEC_MERGE) | |
1822 | && now_seg->entsize) | |
1823 | { | |
1824 | unsigned int entsize = now_seg->entsize; | |
1825 | int entalign = 0; | |
d98b0e2b | 1826 | |
93a24ba7 MR |
1827 | while ((entsize & 1) == 0) |
1828 | { | |
1829 | ++entalign; | |
1830 | entsize >>= 1; | |
381a1ab3 | 1831 | } |
93a24ba7 MR |
1832 | |
1833 | if (entalign > alignment) | |
1834 | alignment = entalign; | |
d98b0e2b | 1835 | } |
0a9ef439 | 1836 | |
d98b0e2b TG |
1837 | if (subseg_text_p (now_seg)) |
1838 | frag_align_code (alignment, 0); | |
1839 | else | |
1840 | frag_align (alignment, 0, 0); | |
252b5132 | 1841 | |
d98b0e2b TG |
1842 | /* frag_align will have left a new frag. |
1843 | Use this last frag for an empty ".fill". | |
252b5132 | 1844 | |
d98b0e2b TG |
1845 | For this segment ... |
1846 | Create a last frag. Do not leave a "being filled in frag". */ | |
1847 | frag_wane (frag_now); | |
1848 | frag_now->fr_fix = 0; | |
1849 | know (frag_now->fr_next == NULL); | |
252b5132 RH |
1850 | } |
1851 | } | |
1852 | ||
d98b0e2b TG |
1853 | static void |
1854 | subsegs_finish (void) | |
1855 | { | |
1856 | asection *s; | |
1857 | ||
1858 | for (s = stdoutput->sections; s; s = s->next) | |
1859 | subsegs_finish_section (s); | |
1860 | } | |
1861 | ||
1862 | #ifdef OBJ_ELF | |
1863 | static void | |
1864 | create_obj_attrs_section (void) | |
1865 | { | |
1866 | segT s; | |
1867 | char *p; | |
1868 | offsetT size; | |
1869 | const char *name; | |
1870 | ||
1871 | size = bfd_elf_obj_attr_size (stdoutput); | |
1872 | if (size) | |
1873 | { | |
1874 | name = get_elf_backend_data (stdoutput)->obj_attrs_section; | |
1875 | if (!name) | |
1876 | name = ".gnu.attributes"; | |
1877 | s = subseg_new (name, 0); | |
1878 | elf_section_type (s) | |
1879 | = get_elf_backend_data (stdoutput)->obj_attrs_section_type; | |
1880 | bfd_set_section_flags (stdoutput, s, SEC_READONLY | SEC_DATA); | |
1881 | frag_now_fix (); | |
1882 | p = frag_more (size); | |
1883 | bfd_elf_set_obj_attr_contents (stdoutput, (bfd_byte *)p, size); | |
1884 | ||
1885 | subsegs_finish_section (s); | |
1886 | relax_segment (seg_info (s)->frchainP->frch_root, s, 0); | |
1887 | size_seg (stdoutput, s, NULL); | |
1888 | } | |
1889 | } | |
1890 | #endif | |
1891 | ||
252b5132 RH |
1892 | /* Write the object file. */ |
1893 | ||
1894 | void | |
d7342424 | 1895 | write_object_file (void) |
252b5132 | 1896 | { |
32638454 | 1897 | struct relax_seg_info rsi; |
7be1c489 | 1898 | #ifndef WORKING_DOT_WORD |
efaf0ba4 | 1899 | fragS *fragP; /* Track along all frags. */ |
252b5132 RH |
1900 | #endif |
1901 | ||
85024cd8 AM |
1902 | subsegs_finish (); |
1903 | ||
16a87420 IS |
1904 | #ifdef md_pre_output_hook |
1905 | md_pre_output_hook; | |
1906 | #endif | |
1907 | ||
cdaa5616 IS |
1908 | #ifdef md_pre_relax_hook |
1909 | md_pre_relax_hook; | |
1910 | #endif | |
1911 | ||
252b5132 | 1912 | /* From now on, we don't care about sub-segments. Build one frag chain |
2b0f3761 | 1913 | for each segment. Linked through fr_next. */ |
252b5132 | 1914 | |
252b5132 RH |
1915 | /* Remove the sections created by gas for its own purposes. */ |
1916 | { | |
252b5132 RH |
1917 | int i; |
1918 | ||
5daa8fe7 L |
1919 | bfd_section_list_remove (stdoutput, reg_section); |
1920 | bfd_section_list_remove (stdoutput, expr_section); | |
1921 | stdoutput->section_count -= 2; | |
252b5132 RH |
1922 | i = 0; |
1923 | bfd_map_over_sections (stdoutput, renumber_sections, &i); | |
1924 | } | |
1925 | ||
1926 | bfd_map_over_sections (stdoutput, chain_frchains_together, (char *) 0); | |
252b5132 RH |
1927 | |
1928 | /* We have two segments. If user gave -R flag, then we must put the | |
1929 | data frags into the text segment. Do this before relaxing so | |
1930 | we know to take advantage of -R and make shorter addresses. */ | |
252b5132 RH |
1931 | if (flag_readonly_data_in_text) |
1932 | { | |
1933 | merge_data_into_text (); | |
1934 | } | |
252b5132 | 1935 | |
32638454 | 1936 | rsi.pass = 0; |
e46d99eb AM |
1937 | while (1) |
1938 | { | |
aacb5251 HPN |
1939 | #ifndef WORKING_DOT_WORD |
1940 | /* We need to reset the markers in the broken word list and | |
1941 | associated frags between calls to relax_segment (via | |
1942 | relax_seg). Since the broken word list is global, we do it | |
1943 | once per round, rather than locally in relax_segment for each | |
1944 | segment. */ | |
1945 | struct broken_word *brokp; | |
1946 | ||
1947 | for (brokp = broken_words; | |
1948 | brokp != (struct broken_word *) NULL; | |
1949 | brokp = brokp->next_broken_word) | |
1950 | { | |
1951 | brokp->added = 0; | |
1952 | ||
1953 | if (brokp->dispfrag != (fragS *) NULL | |
1954 | && brokp->dispfrag->fr_type == rs_broken_word) | |
1955 | brokp->dispfrag->fr_subtype = 0; | |
1956 | } | |
1957 | #endif | |
1958 | ||
32638454 AM |
1959 | rsi.changed = 0; |
1960 | bfd_map_over_sections (stdoutput, relax_seg, &rsi); | |
1961 | rsi.pass++; | |
1962 | if (!rsi.changed) | |
e46d99eb AM |
1963 | break; |
1964 | } | |
e027f3e8 | 1965 | |
87548816 NC |
1966 | /* Note - Most ports will use the default value of |
1967 | TC_FINALIZE_SYMS_BEFORE_SIZE_SEG, which 1. This will force | |
1968 | local symbols to be resolved, removing their frag information. | |
1969 | Some ports however, will not have finished relaxing all of | |
1970 | their frags and will still need the local symbol frag | |
1971 | information. These ports can set | |
1972 | TC_FINALIZE_SYMS_BEFORE_SIZE_SEG to 0. */ | |
1973 | finalize_syms = TC_FINALIZE_SYMS_BEFORE_SIZE_SEG; | |
1974 | ||
e46d99eb | 1975 | bfd_map_over_sections (stdoutput, size_seg, (char *) 0); |
e46d99eb | 1976 | |
38b87a1b NC |
1977 | /* Relaxation has completed. Freeze all syms. */ |
1978 | finalize_syms = 1; | |
1979 | ||
ba8826a8 AO |
1980 | dwarf2dbg_final_check (); |
1981 | ||
e0001a05 NC |
1982 | #ifdef md_post_relax_hook |
1983 | md_post_relax_hook; | |
1984 | #endif | |
1985 | ||
d98b0e2b TG |
1986 | #ifdef OBJ_ELF |
1987 | if (IS_ELF) | |
1988 | create_obj_attrs_section (); | |
1989 | #endif | |
1990 | ||
252b5132 RH |
1991 | #ifndef WORKING_DOT_WORD |
1992 | { | |
1993 | struct broken_word *lie; | |
1994 | struct broken_word **prevP; | |
1995 | ||
1996 | prevP = &broken_words; | |
1997 | for (lie = broken_words; lie; lie = lie->next_broken_word) | |
1998 | if (!lie->added) | |
1999 | { | |
2000 | expressionS exp; | |
2001 | ||
2002 | subseg_change (lie->seg, lie->subseg); | |
2003 | exp.X_op = O_subtract; | |
2004 | exp.X_add_symbol = lie->add; | |
2005 | exp.X_op_symbol = lie->sub; | |
2006 | exp.X_add_number = lie->addnum; | |
252b5132 RH |
2007 | #ifdef TC_CONS_FIX_NEW |
2008 | TC_CONS_FIX_NEW (lie->frag, | |
efaf0ba4 | 2009 | lie->word_goes_here - lie->frag->fr_literal, |
62ebcb5c | 2010 | 2, &exp, TC_PARSE_CONS_RETURN_NONE); |
252b5132 RH |
2011 | #else |
2012 | fix_new_exp (lie->frag, | |
2013 | lie->word_goes_here - lie->frag->fr_literal, | |
2014 | 2, &exp, 0, BFD_RELOC_16); | |
2015 | #endif | |
252b5132 RH |
2016 | *prevP = lie->next_broken_word; |
2017 | } | |
2018 | else | |
2019 | prevP = &(lie->next_broken_word); | |
2020 | ||
2021 | for (lie = broken_words; lie;) | |
2022 | { | |
2023 | struct broken_word *untruth; | |
2024 | char *table_ptr; | |
2025 | addressT table_addr; | |
2026 | addressT from_addr, to_addr; | |
2027 | int n, m; | |
2028 | ||
2029 | subseg_change (lie->seg, lie->subseg); | |
2030 | fragP = lie->dispfrag; | |
2031 | ||
2032 | /* Find out how many broken_words go here. */ | |
2033 | n = 0; | |
efaf0ba4 NC |
2034 | for (untruth = lie; |
2035 | untruth && untruth->dispfrag == fragP; | |
2036 | untruth = untruth->next_broken_word) | |
252b5132 RH |
2037 | if (untruth->added == 1) |
2038 | n++; | |
2039 | ||
2040 | table_ptr = lie->dispfrag->fr_opcode; | |
efaf0ba4 NC |
2041 | table_addr = (lie->dispfrag->fr_address |
2042 | + (table_ptr - lie->dispfrag->fr_literal)); | |
252b5132 RH |
2043 | /* Create the jump around the long jumps. This is a short |
2044 | jump from table_ptr+0 to table_ptr+n*long_jump_size. */ | |
2045 | from_addr = table_addr; | |
2046 | to_addr = table_addr + md_short_jump_size + n * md_long_jump_size; | |
efaf0ba4 NC |
2047 | md_create_short_jump (table_ptr, from_addr, to_addr, lie->dispfrag, |
2048 | lie->add); | |
252b5132 RH |
2049 | table_ptr += md_short_jump_size; |
2050 | table_addr += md_short_jump_size; | |
2051 | ||
efaf0ba4 NC |
2052 | for (m = 0; |
2053 | lie && lie->dispfrag == fragP; | |
2054 | m++, lie = lie->next_broken_word) | |
252b5132 RH |
2055 | { |
2056 | if (lie->added == 2) | |
2057 | continue; | |
efaf0ba4 | 2058 | /* Patch the jump table. */ |
187af7df | 2059 | for (untruth = (struct broken_word *) (fragP->fr_symbol); |
efaf0ba4 NC |
2060 | untruth && untruth->dispfrag == fragP; |
2061 | untruth = untruth->next_broken_word) | |
252b5132 RH |
2062 | { |
2063 | if (untruth->use_jump == lie) | |
187af7df HPN |
2064 | { |
2065 | /* This is the offset from ??? to table_ptr+0. | |
2066 | The target is the same for all users of this | |
2067 | md_long_jump, but the "sub" bases (and hence the | |
2068 | offsets) may be different. */ | |
2069 | addressT to_word = table_addr - S_GET_VALUE (untruth->sub); | |
2070 | #ifdef TC_CHECK_ADJUSTED_BROKEN_DOT_WORD | |
2071 | TC_CHECK_ADJUSTED_BROKEN_DOT_WORD (to_word, untruth); | |
2072 | #endif | |
2073 | md_number_to_chars (untruth->word_goes_here, to_word, 2); | |
2074 | } | |
252b5132 RH |
2075 | } |
2076 | ||
efaf0ba4 NC |
2077 | /* Install the long jump. */ |
2078 | /* This is a long jump from table_ptr+0 to the final target. */ | |
252b5132 RH |
2079 | from_addr = table_addr; |
2080 | to_addr = S_GET_VALUE (lie->add) + lie->addnum; | |
efaf0ba4 NC |
2081 | md_create_long_jump (table_ptr, from_addr, to_addr, lie->dispfrag, |
2082 | lie->add); | |
252b5132 RH |
2083 | table_ptr += md_long_jump_size; |
2084 | table_addr += md_long_jump_size; | |
2085 | } | |
2086 | } | |
2087 | } | |
efaf0ba4 | 2088 | #endif /* not WORKING_DOT_WORD */ |
252b5132 | 2089 | |
252b5132 RH |
2090 | /* Resolve symbol values. This needs to be done before processing |
2091 | the relocations. */ | |
2092 | if (symbol_rootP) | |
2093 | { | |
2094 | symbolS *symp; | |
2095 | ||
2096 | for (symp = symbol_rootP; symp; symp = symbol_next (symp)) | |
6386f3a7 | 2097 | resolve_symbol_value (symp); |
252b5132 | 2098 | } |
49309057 | 2099 | resolve_local_symbol_values (); |
05e9452c | 2100 | resolve_reloc_expr_symbols (); |
252b5132 RH |
2101 | |
2102 | PROGRESS (1); | |
2103 | ||
2104 | #ifdef tc_frob_file_before_adjust | |
2105 | tc_frob_file_before_adjust (); | |
2106 | #endif | |
2107 | #ifdef obj_frob_file_before_adjust | |
2108 | obj_frob_file_before_adjust (); | |
2109 | #endif | |
2110 | ||
efaf0ba4 | 2111 | bfd_map_over_sections (stdoutput, adjust_reloc_syms, (char *) 0); |
252b5132 | 2112 | |
a161fe53 AM |
2113 | #ifdef tc_frob_file_before_fix |
2114 | tc_frob_file_before_fix (); | |
2115 | #endif | |
2116 | #ifdef obj_frob_file_before_fix | |
2117 | obj_frob_file_before_fix (); | |
2118 | #endif | |
2119 | ||
2120 | bfd_map_over_sections (stdoutput, fix_segment, (char *) 0); | |
2121 | ||
252b5132 RH |
2122 | /* Set up symbol table, and write it out. */ |
2123 | if (symbol_rootP) | |
2124 | { | |
2125 | symbolS *symp; | |
aaac53f5 | 2126 | bfd_boolean skip_next_symbol = FALSE; |
252b5132 RH |
2127 | |
2128 | for (symp = symbol_rootP; symp; symp = symbol_next (symp)) | |
2129 | { | |
2130 | int punt = 0; | |
2131 | const char *name; | |
2132 | ||
aaac53f5 HPN |
2133 | if (skip_next_symbol) |
2134 | { | |
2135 | /* Don't do anything besides moving the value of the | |
2136 | symbol from the GAS value-field to the BFD value-field. */ | |
2137 | symbol_get_bfdsym (symp)->value = S_GET_VALUE (symp); | |
2138 | skip_next_symbol = FALSE; | |
2139 | continue; | |
2140 | } | |
2141 | ||
49309057 | 2142 | if (symbol_mri_common_p (symp)) |
252b5132 RH |
2143 | { |
2144 | if (S_IS_EXTERNAL (symp)) | |
2145 | as_bad (_("%s: global symbols not supported in common sections"), | |
2146 | S_GET_NAME (symp)); | |
2147 | symbol_remove (symp, &symbol_rootP, &symbol_lastP); | |
2148 | continue; | |
2149 | } | |
2150 | ||
2151 | name = S_GET_NAME (symp); | |
2152 | if (name) | |
2153 | { | |
efaf0ba4 NC |
2154 | const char *name2 = |
2155 | decode_local_label_name ((char *) S_GET_NAME (symp)); | |
252b5132 RH |
2156 | /* They only differ if `name' is a fb or dollar local |
2157 | label name. */ | |
2158 | if (name2 != name && ! S_IS_DEFINED (symp)) | |
0e389e77 | 2159 | as_bad (_("local label `%s' is not defined"), name2); |
252b5132 RH |
2160 | } |
2161 | ||
2162 | /* Do it again, because adjust_reloc_syms might introduce | |
2163 | more symbols. They'll probably only be section symbols, | |
2164 | but they'll still need to have the values computed. */ | |
6386f3a7 | 2165 | resolve_symbol_value (symp); |
252b5132 RH |
2166 | |
2167 | /* Skip symbols which were equated to undefined or common | |
b4b24b79 | 2168 | symbols. */ |
06e77878 AO |
2169 | if (symbol_equated_reloc_p (symp) |
2170 | || S_IS_WEAKREFR (symp)) | |
252b5132 | 2171 | { |
91d6fa6a NC |
2172 | const char *sname = S_GET_NAME (symp); |
2173 | ||
60938e80 | 2174 | if (S_IS_COMMON (symp) |
91d6fa6a | 2175 | && !TC_FAKE_LABEL (sname) |
76db0a2e | 2176 | && !S_IS_WEAKREFR (symp)) |
60938e80 L |
2177 | { |
2178 | expressionS *e = symbol_get_value_expression (symp); | |
91d6fa6a | 2179 | |
76db0a2e | 2180 | as_bad (_("`%s' can't be equated to common symbol `%s'"), |
91d6fa6a | 2181 | sname, S_GET_NAME (e->X_add_symbol)); |
60938e80 | 2182 | } |
d0548f34 L |
2183 | if (S_GET_SEGMENT (symp) == reg_section) |
2184 | { | |
2185 | /* Report error only if we know the symbol name. */ | |
2186 | if (S_GET_NAME (symp) != reg_section->name) | |
2187 | as_bad (_("can't make global register symbol `%s'"), | |
91d6fa6a | 2188 | sname); |
d0548f34 | 2189 | } |
252b5132 RH |
2190 | symbol_remove (symp, &symbol_rootP, &symbol_lastP); |
2191 | continue; | |
2192 | } | |
2193 | ||
252b5132 RH |
2194 | #ifdef obj_frob_symbol |
2195 | obj_frob_symbol (symp, punt); | |
2196 | #endif | |
2197 | #ifdef tc_frob_symbol | |
49309057 | 2198 | if (! punt || symbol_used_in_reloc_p (symp)) |
252b5132 RH |
2199 | tc_frob_symbol (symp, punt); |
2200 | #endif | |
2201 | ||
2202 | /* If we don't want to keep this symbol, splice it out of | |
2203 | the chain now. If EMIT_SECTION_SYMBOLS is 0, we never | |
2204 | want section symbols. Otherwise, we skip local symbols | |
2205 | and symbols that the frob_symbol macros told us to punt, | |
2206 | but we keep such symbols if they are used in relocs. */ | |
a161fe53 AM |
2207 | if (symp == abs_section_sym |
2208 | || (! EMIT_SECTION_SYMBOLS | |
2209 | && symbol_section_p (symp)) | |
e97b3f28 | 2210 | /* Note that S_IS_EXTERNAL and S_IS_LOCAL are not always |
252b5132 RH |
2211 | opposites. Sometimes the former checks flags and the |
2212 | latter examines the name... */ | |
e97b3f28 | 2213 | || (!S_IS_EXTERNAL (symp) |
461b725f AO |
2214 | && (punt || S_IS_LOCAL (symp) || |
2215 | (S_IS_WEAKREFD (symp) && ! symbol_used_p (symp))) | |
49309057 | 2216 | && ! symbol_used_in_reloc_p (symp))) |
252b5132 RH |
2217 | { |
2218 | symbol_remove (symp, &symbol_rootP, &symbol_lastP); | |
efaf0ba4 | 2219 | |
252b5132 RH |
2220 | /* After symbol_remove, symbol_next(symp) still returns |
2221 | the one that came after it in the chain. So we don't | |
2222 | need to do any extra cleanup work here. */ | |
252b5132 RH |
2223 | continue; |
2224 | } | |
2225 | ||
2226 | /* Make sure we really got a value for the symbol. */ | |
49309057 | 2227 | if (! symbol_resolved_p (symp)) |
252b5132 | 2228 | { |
0e389e77 | 2229 | as_bad (_("can't resolve value for symbol `%s'"), |
252b5132 | 2230 | S_GET_NAME (symp)); |
49309057 | 2231 | symbol_mark_resolved (symp); |
252b5132 RH |
2232 | } |
2233 | ||
2234 | /* Set the value into the BFD symbol. Up til now the value | |
2235 | has only been kept in the gas symbolS struct. */ | |
49309057 | 2236 | symbol_get_bfdsym (symp)->value = S_GET_VALUE (symp); |
aaac53f5 HPN |
2237 | |
2238 | /* A warning construct is a warning symbol followed by the | |
2239 | symbol warned about. Don't let anything object-format or | |
2240 | target-specific muck with it; it's ready for output. */ | |
2241 | if (symbol_get_bfdsym (symp)->flags & BSF_WARNING) | |
2242 | skip_next_symbol = TRUE; | |
252b5132 RH |
2243 | } |
2244 | } | |
2245 | ||
2246 | PROGRESS (1); | |
2247 | ||
2248 | /* Now do any format-specific adjustments to the symbol table, such | |
2249 | as adding file symbols. */ | |
2250 | #ifdef tc_adjust_symtab | |
2251 | tc_adjust_symtab (); | |
2252 | #endif | |
2253 | #ifdef obj_adjust_symtab | |
2254 | obj_adjust_symtab (); | |
2255 | #endif | |
2256 | ||
d0548f34 L |
2257 | /* Stop if there is an error. */ |
2258 | if (had_errors ()) | |
2259 | return; | |
2260 | ||
252b5132 RH |
2261 | /* Now that all the sizes are known, and contents correct, we can |
2262 | start writing to the file. */ | |
2ae08483 | 2263 | set_symtab (); |
252b5132 RH |
2264 | |
2265 | /* If *_frob_file changes the symbol value at this point, it is | |
2266 | responsible for moving the changed value into symp->bsym->value | |
2267 | as well. Hopefully all symbol value changing can be done in | |
2268 | *_frob_symbol. */ | |
2269 | #ifdef tc_frob_file | |
2270 | tc_frob_file (); | |
2271 | #endif | |
2272 | #ifdef obj_frob_file | |
2273 | obj_frob_file (); | |
2274 | #endif | |
f3d2b04b KT |
2275 | #ifdef obj_coff_generate_pdata |
2276 | obj_coff_generate_pdata (); | |
2277 | #endif | |
252b5132 RH |
2278 | bfd_map_over_sections (stdoutput, write_relocs, (char *) 0); |
2279 | ||
f1c2d4af | 2280 | #ifdef tc_frob_file_after_relocs |
252b5132 RH |
2281 | tc_frob_file_after_relocs (); |
2282 | #endif | |
2283 | #ifdef obj_frob_file_after_relocs | |
2284 | obj_frob_file_after_relocs (); | |
2285 | #endif | |
f1c2d4af | 2286 | |
b8871f35 L |
2287 | #if defined OBJ_ELF || defined OBJ_MAYBE_ELF |
2288 | if (IS_ELF && flag_use_elf_stt_common) | |
2289 | stdoutput->flags |= BFD_CONVERT_ELF_COMMON | BFD_USE_ELF_STT_COMMON; | |
2290 | #endif | |
2291 | ||
0acf065b CC |
2292 | /* Once all relocations have been written, we can compress the |
2293 | contents of the debug sections. This needs to be done before | |
2294 | we start writing any sections, because it will affect the file | |
2295 | layout, which is fixed once we start writing contents. */ | |
2296 | if (flag_compress_debug) | |
8ecb73dd L |
2297 | { |
2298 | if (flag_compress_debug == COMPRESS_DEBUG_GABI_ZLIB) | |
2299 | stdoutput->flags |= BFD_COMPRESS | BFD_COMPRESS_GABI; | |
2300 | else | |
2301 | stdoutput->flags |= BFD_COMPRESS; | |
2302 | bfd_map_over_sections (stdoutput, compress_debug, (char *) 0); | |
2303 | } | |
0acf065b | 2304 | |
252b5132 | 2305 | bfd_map_over_sections (stdoutput, write_contents, (char *) 0); |
252b5132 | 2306 | } |
252b5132 RH |
2307 | |
2308 | #ifdef TC_GENERIC_RELAX_TABLE | |
252b5132 RH |
2309 | /* Relax a fragment by scanning TC_GENERIC_RELAX_TABLE. */ |
2310 | ||
2311 | long | |
d7342424 | 2312 | relax_frag (segT segment, fragS *fragP, long stretch) |
252b5132 RH |
2313 | { |
2314 | const relax_typeS *this_type; | |
2315 | const relax_typeS *start_type; | |
2316 | relax_substateT next_state; | |
2317 | relax_substateT this_state; | |
685736be | 2318 | offsetT growth; |
38686296 AM |
2319 | offsetT aim; |
2320 | addressT target; | |
2321 | addressT address; | |
2322 | symbolS *symbolP; | |
2323 | const relax_typeS *table; | |
2324 | ||
2325 | target = fragP->fr_offset; | |
2326 | address = fragP->fr_address; | |
2327 | table = TC_GENERIC_RELAX_TABLE; | |
252b5132 RH |
2328 | this_state = fragP->fr_subtype; |
2329 | start_type = this_type = table + this_state; | |
38686296 | 2330 | symbolP = fragP->fr_symbol; |
252b5132 RH |
2331 | |
2332 | if (symbolP) | |
2333 | { | |
c842b53a ILT |
2334 | fragS *sym_frag; |
2335 | ||
2336 | sym_frag = symbol_get_frag (symbolP); | |
2337 | ||
252b5132 | 2338 | #ifndef DIFF_EXPR_OK |
c842b53a | 2339 | know (sym_frag != NULL); |
252b5132 | 2340 | #endif |
a161fe53 | 2341 | know (S_GET_SEGMENT (symbolP) != absolute_section |
c842b53a | 2342 | || sym_frag == &zero_address_frag); |
ac62c346 | 2343 | target += S_GET_VALUE (symbolP); |
252b5132 | 2344 | |
e35a414d AM |
2345 | /* If SYM_FRAG has yet to be reached on this pass, assume it |
2346 | will move by STRETCH just as we did, unless there is an | |
2347 | alignment frag between here and SYM_FRAG. An alignment may | |
2348 | well absorb any STRETCH, and we don't want to choose a larger | |
2349 | branch insn by overestimating the needed reach of this | |
2350 | branch. It isn't critical to calculate TARGET exactly; We | |
2351 | know we'll be doing another pass if STRETCH is non-zero. */ | |
252b5132 | 2352 | |
c842b53a | 2353 | if (stretch != 0 |
38686296 AM |
2354 | && sym_frag->relax_marker != fragP->relax_marker |
2355 | && S_GET_SEGMENT (symbolP) == segment) | |
252b5132 | 2356 | { |
e35a414d AM |
2357 | if (stretch < 0 |
2358 | || sym_frag->region == fragP->region) | |
2359 | target += stretch; | |
e5940dff AM |
2360 | /* If we get here we know we have a forward branch. This |
2361 | relax pass may have stretched previous instructions so | |
2362 | far that omitting STRETCH would make the branch | |
2363 | negative. Don't allow this in case the negative reach is | |
2364 | large enough to require a larger branch instruction. */ | |
2365 | else if (target < address) | |
2366 | target = fragP->fr_next->fr_address + stretch; | |
252b5132 RH |
2367 | } |
2368 | } | |
2369 | ||
2370 | aim = target - address - fragP->fr_fix; | |
2371 | #ifdef TC_PCREL_ADJUST | |
efaf0ba4 NC |
2372 | /* Currently only the ns32k family needs this. */ |
2373 | aim += TC_PCREL_ADJUST (fragP); | |
efaf0ba4 | 2374 | #endif |
59c871b4 BE |
2375 | |
2376 | #ifdef md_prepare_relax_scan | |
2377 | /* Formerly called M68K_AIM_KLUDGE. */ | |
252b5132 RH |
2378 | md_prepare_relax_scan (fragP, address, aim, this_state, this_type); |
2379 | #endif | |
2380 | ||
2381 | if (aim < 0) | |
2382 | { | |
efaf0ba4 | 2383 | /* Look backwards. */ |
252b5132 RH |
2384 | for (next_state = this_type->rlx_more; next_state;) |
2385 | if (aim >= this_type->rlx_backward) | |
2386 | next_state = 0; | |
2387 | else | |
2388 | { | |
efaf0ba4 | 2389 | /* Grow to next state. */ |
252b5132 RH |
2390 | this_state = next_state; |
2391 | this_type = table + this_state; | |
2392 | next_state = this_type->rlx_more; | |
2393 | } | |
2394 | } | |
2395 | else | |
2396 | { | |
efaf0ba4 | 2397 | /* Look forwards. */ |
252b5132 RH |
2398 | for (next_state = this_type->rlx_more; next_state;) |
2399 | if (aim <= this_type->rlx_forward) | |
2400 | next_state = 0; | |
2401 | else | |
2402 | { | |
efaf0ba4 | 2403 | /* Grow to next state. */ |
252b5132 RH |
2404 | this_state = next_state; |
2405 | this_type = table + this_state; | |
2406 | next_state = this_type->rlx_more; | |
2407 | } | |
2408 | } | |
2409 | ||
2410 | growth = this_type->rlx_length - start_type->rlx_length; | |
2411 | if (growth != 0) | |
2412 | fragP->fr_subtype = this_state; | |
2413 | return growth; | |
2414 | } | |
2415 | ||
efaf0ba4 | 2416 | #endif /* defined (TC_GENERIC_RELAX_TABLE) */ |
252b5132 RH |
2417 | |
2418 | /* Relax_align. Advance location counter to next address that has 'alignment' | |
2419 | lowest order bits all 0s, return size of adjustment made. */ | |
2420 | static relax_addressT | |
ed9e98c2 AM |
2421 | relax_align (relax_addressT address, /* Address now. */ |
2422 | int alignment /* Alignment (binary). */) | |
252b5132 RH |
2423 | { |
2424 | relax_addressT mask; | |
2425 | relax_addressT new_address; | |
2426 | ||
65879393 | 2427 | mask = ~((relax_addressT) ~0 << alignment); |
252b5132 RH |
2428 | new_address = (address + mask) & (~mask); |
2429 | #ifdef LINKER_RELAXING_SHRINKS_ONLY | |
2430 | if (linkrelax) | |
2431 | /* We must provide lots of padding, so the linker can discard it | |
2432 | when needed. The linker will not add extra space, ever. */ | |
2433 | new_address += (1 << alignment); | |
2434 | #endif | |
2435 | return (new_address - address); | |
2436 | } | |
2437 | ||
efaf0ba4 NC |
2438 | /* Now we have a segment, not a crowd of sub-segments, we can make |
2439 | fr_address values. | |
58a77e41 | 2440 | |
efaf0ba4 | 2441 | Relax the frags. |
58a77e41 | 2442 | |
efaf0ba4 NC |
2443 | After this, all frags in this segment have addresses that are correct |
2444 | within the segment. Since segments live in different file addresses, | |
2445 | these frag addresses may not be the same as final object-file | |
2446 | addresses. */ | |
2447 | ||
e46d99eb | 2448 | int |
32638454 | 2449 | relax_segment (struct frag *segment_frag_root, segT segment, int pass) |
252b5132 | 2450 | { |
4111faa5 NC |
2451 | unsigned long frag_count; |
2452 | struct frag *fragP; | |
2453 | relax_addressT address; | |
e35a414d | 2454 | int region; |
e46d99eb AM |
2455 | int ret; |
2456 | ||
efaf0ba4 | 2457 | /* In case md_estimate_size_before_relax() wants to make fixSs. */ |
252b5132 RH |
2458 | subseg_change (segment, 0); |
2459 | ||
2460 | /* For each frag in segment: count and store (a 1st guess of) | |
2461 | fr_address. */ | |
2462 | address = 0; | |
e35a414d | 2463 | region = 0; |
4111faa5 NC |
2464 | for (frag_count = 0, fragP = segment_frag_root; |
2465 | fragP; | |
2466 | fragP = fragP->fr_next, frag_count ++) | |
252b5132 | 2467 | { |
e35a414d | 2468 | fragP->region = region; |
38686296 | 2469 | fragP->relax_marker = 0; |
252b5132 RH |
2470 | fragP->fr_address = address; |
2471 | address += fragP->fr_fix; | |
2472 | ||
2473 | switch (fragP->fr_type) | |
2474 | { | |
2475 | case rs_fill: | |
2476 | address += fragP->fr_offset * fragP->fr_var; | |
2477 | break; | |
2478 | ||
2479 | case rs_align: | |
2480 | case rs_align_code: | |
0a9ef439 | 2481 | case rs_align_test: |
252b5132 RH |
2482 | { |
2483 | addressT offset = relax_align (address, (int) fragP->fr_offset); | |
2484 | ||
2485 | if (fragP->fr_subtype != 0 && offset > fragP->fr_subtype) | |
2486 | offset = 0; | |
2487 | ||
2488 | if (offset % fragP->fr_var != 0) | |
2489 | { | |
54d3cad9 | 2490 | as_bad_where (fragP->fr_file, fragP->fr_line, |
992a06ee AM |
2491 | ngettext ("alignment padding (%lu byte) " |
2492 | "not a multiple of %ld", | |
2493 | "alignment padding (%lu bytes) " | |
2494 | "not a multiple of %ld", | |
2495 | (unsigned long) offset), | |
54d3cad9 | 2496 | (unsigned long) offset, (long) fragP->fr_var); |
252b5132 RH |
2497 | offset -= (offset % fragP->fr_var); |
2498 | } | |
2499 | ||
2500 | address += offset; | |
e35a414d | 2501 | region += 1; |
252b5132 RH |
2502 | } |
2503 | break; | |
2504 | ||
2505 | case rs_org: | |
252b5132 | 2506 | /* Assume .org is nugatory. It will grow with 1st relax. */ |
e35a414d AM |
2507 | region += 1; |
2508 | break; | |
2509 | ||
2510 | case rs_space: | |
62a02d25 | 2511 | case rs_space_nop: |
252b5132 RH |
2512 | break; |
2513 | ||
2514 | case rs_machine_dependent: | |
e0890092 AM |
2515 | /* If fr_symbol is an expression, this call to |
2516 | resolve_symbol_value sets up the correct segment, which will | |
2517 | likely be needed in md_estimate_size_before_relax. */ | |
2518 | if (fragP->fr_symbol) | |
2519 | resolve_symbol_value (fragP->fr_symbol); | |
2520 | ||
252b5132 RH |
2521 | address += md_estimate_size_before_relax (fragP, segment); |
2522 | break; | |
2523 | ||
2524 | #ifndef WORKING_DOT_WORD | |
efaf0ba4 | 2525 | /* Broken words don't concern us yet. */ |
252b5132 RH |
2526 | case rs_broken_word: |
2527 | break; | |
2528 | #endif | |
2529 | ||
2530 | case rs_leb128: | |
efaf0ba4 | 2531 | /* Initial guess is always 1; doing otherwise can result in |
252b5132 RH |
2532 | stable solutions that are larger than the minimum. */ |
2533 | address += fragP->fr_offset = 1; | |
2534 | break; | |
2535 | ||
2536 | case rs_cfa: | |
2537 | address += eh_frame_estimate_size_before_relax (fragP); | |
2538 | break; | |
2539 | ||
220e750f RH |
2540 | case rs_dwarf2dbg: |
2541 | address += dwarf2dbg_estimate_size_before_relax (fragP); | |
2542 | break; | |
2543 | ||
252b5132 RH |
2544 | default: |
2545 | BAD_CASE (fragP->fr_type); | |
2546 | break; | |
efaf0ba4 NC |
2547 | } |
2548 | } | |
252b5132 RH |
2549 | |
2550 | /* Do relax(). */ | |
2551 | { | |
4111faa5 | 2552 | unsigned long max_iterations; |
d1c5f158 AM |
2553 | |
2554 | /* Cumulative address adjustment. */ | |
2555 | offsetT stretch; | |
2556 | ||
2557 | /* Have we made any adjustment this pass? We can't just test | |
2558 | stretch because one piece of code may have grown and another | |
2559 | shrank. */ | |
2560 | int stretched; | |
2561 | ||
2562 | /* Most horrible, but gcc may give us some exception data that | |
2563 | is impossible to assemble, of the form | |
2564 | ||
2565 | .align 4 | |
2566 | .byte 0, 0 | |
2567 | .uleb128 end - start | |
2568 | start: | |
2569 | .space 128*128 - 1 | |
2570 | .align 4 | |
2571 | end: | |
2572 | ||
2573 | If the leb128 is two bytes in size, then end-start is 128*128, | |
2574 | which requires a three byte leb128. If the leb128 is three | |
2575 | bytes in size, then end-start is 128*128-1, which requires a | |
2576 | two byte leb128. We work around this dilemma by inserting | |
2577 | an extra 4 bytes of alignment just after the .align. This | |
2578 | works because the data after the align is accessed relative to | |
2579 | the end label. | |
2580 | ||
2581 | This counter is used in a tiny state machine to detect | |
2582 | whether a leb128 followed by an align is impossible to | |
2583 | relax. */ | |
2584 | int rs_leb128_fudge = 0; | |
252b5132 | 2585 | |
4111faa5 NC |
2586 | /* We want to prevent going into an infinite loop where one frag grows |
2587 | depending upon the location of a symbol which is in turn moved by | |
2588 | the growing frag. eg: | |
2589 | ||
b4b24b79 AM |
2590 | foo = . |
2591 | .org foo+16 | |
2592 | foo = . | |
4111faa5 | 2593 | |
b4b24b79 | 2594 | So we dictate that this algorithm can be at most O2. */ |
4111faa5 NC |
2595 | max_iterations = frag_count * frag_count; |
2596 | /* Check for overflow. */ | |
2597 | if (max_iterations < frag_count) | |
2598 | max_iterations = frag_count; | |
2599 | ||
32638454 | 2600 | ret = 0; |
252b5132 RH |
2601 | do |
2602 | { | |
e46d99eb AM |
2603 | stretch = 0; |
2604 | stretched = 0; | |
58a77e41 | 2605 | |
252b5132 RH |
2606 | for (fragP = segment_frag_root; fragP; fragP = fragP->fr_next) |
2607 | { | |
685736be | 2608 | offsetT growth = 0; |
252b5132 RH |
2609 | addressT was_address; |
2610 | offsetT offset; | |
2611 | symbolS *symbolP; | |
2612 | ||
38686296 | 2613 | fragP->relax_marker ^= 1; |
252b5132 RH |
2614 | was_address = fragP->fr_address; |
2615 | address = fragP->fr_address += stretch; | |
2616 | symbolP = fragP->fr_symbol; | |
2617 | offset = fragP->fr_offset; | |
2618 | ||
2619 | switch (fragP->fr_type) | |
2620 | { | |
efaf0ba4 | 2621 | case rs_fill: /* .fill never relaxes. */ |
252b5132 RH |
2622 | growth = 0; |
2623 | break; | |
2624 | ||
2625 | #ifndef WORKING_DOT_WORD | |
2626 | /* JF: This is RMS's idea. I do *NOT* want to be blamed | |
2627 | for it I do not want to write it. I do not want to have | |
2628 | anything to do with it. This is not the proper way to | |
2629 | implement this misfeature. */ | |
2630 | case rs_broken_word: | |
2631 | { | |
2632 | struct broken_word *lie; | |
2633 | struct broken_word *untruth; | |
2634 | ||
2635 | /* Yes this is ugly (storing the broken_word pointer | |
2636 | in the symbol slot). Still, this whole chunk of | |
2637 | code is ugly, and I don't feel like doing anything | |
2638 | about it. Think of it as stubbornness in action. */ | |
2639 | growth = 0; | |
2640 | for (lie = (struct broken_word *) (fragP->fr_symbol); | |
2641 | lie && lie->dispfrag == fragP; | |
2642 | lie = lie->next_broken_word) | |
2643 | { | |
2644 | ||
2645 | if (lie->added) | |
2646 | continue; | |
2647 | ||
ac62c346 | 2648 | offset = (S_GET_VALUE (lie->add) |
252b5132 | 2649 | + lie->addnum |
ac62c346 | 2650 | - S_GET_VALUE (lie->sub)); |
252b5132 RH |
2651 | if (offset <= -32768 || offset >= 32767) |
2652 | { | |
2653 | if (flag_warn_displacement) | |
2654 | { | |
2655 | char buf[50]; | |
2656 | sprint_value (buf, (addressT) lie->addnum); | |
54d3cad9 AM |
2657 | as_warn_where (fragP->fr_file, fragP->fr_line, |
2658 | _(".word %s-%s+%s didn't fit"), | |
2659 | S_GET_NAME (lie->add), | |
2660 | S_GET_NAME (lie->sub), | |
2661 | buf); | |
252b5132 | 2662 | } |
252b5132 RH |
2663 | if (fragP->fr_subtype == 0) |
2664 | { | |
2665 | fragP->fr_subtype++; | |
2666 | growth += md_short_jump_size; | |
2667 | } | |
187af7df HPN |
2668 | |
2669 | /* Redirect *all* words of this table with the same | |
2670 | target, lest we have to handle the case where the | |
2671 | same target but with a offset that fits on this | |
2672 | round overflows at the next relaxation round. */ | |
2673 | for (untruth = (struct broken_word *) (fragP->fr_symbol); | |
252b5132 RH |
2674 | untruth && untruth->dispfrag == lie->dispfrag; |
2675 | untruth = untruth->next_broken_word) | |
49309057 ILT |
2676 | if ((symbol_get_frag (untruth->add) |
2677 | == symbol_get_frag (lie->add)) | |
2678 | && (S_GET_VALUE (untruth->add) | |
2679 | == S_GET_VALUE (lie->add))) | |
252b5132 RH |
2680 | { |
2681 | untruth->added = 2; | |
2682 | untruth->use_jump = lie; | |
2683 | } | |
187af7df HPN |
2684 | |
2685 | lie->added = 1; | |
252b5132 RH |
2686 | growth += md_long_jump_size; |
2687 | } | |
2688 | } | |
2689 | ||
2690 | break; | |
efaf0ba4 | 2691 | } /* case rs_broken_word */ |
252b5132 RH |
2692 | #endif |
2693 | case rs_align: | |
2694 | case rs_align_code: | |
0a9ef439 | 2695 | case rs_align_test: |
252b5132 RH |
2696 | { |
2697 | addressT oldoff, newoff; | |
2698 | ||
2699 | oldoff = relax_align (was_address + fragP->fr_fix, | |
2700 | (int) offset); | |
2701 | newoff = relax_align (address + fragP->fr_fix, | |
2702 | (int) offset); | |
2703 | ||
2704 | if (fragP->fr_subtype != 0) | |
2705 | { | |
2706 | if (oldoff > fragP->fr_subtype) | |
2707 | oldoff = 0; | |
2708 | if (newoff > fragP->fr_subtype) | |
2709 | newoff = 0; | |
2710 | } | |
2711 | ||
2712 | growth = newoff - oldoff; | |
d1c5f158 AM |
2713 | |
2714 | /* If this align happens to follow a leb128 and | |
2715 | we have determined that the leb128 is bouncing | |
2716 | in size, then break the cycle by inserting an | |
2717 | extra alignment. */ | |
2718 | if (growth < 0 | |
2719 | && (rs_leb128_fudge & 16) != 0 | |
2720 | && (rs_leb128_fudge & 15) >= 2) | |
2721 | { | |
2722 | segment_info_type *seginfo = seg_info (segment); | |
2723 | struct obstack *ob = &seginfo->frchainP->frch_obstack; | |
2724 | struct frag *newf; | |
2725 | ||
2726 | newf = frag_alloc (ob); | |
2727 | obstack_blank_fast (ob, fragP->fr_var); | |
2728 | obstack_finish (ob); | |
2729 | memcpy (newf, fragP, SIZEOF_STRUCT_FRAG); | |
2730 | memcpy (newf->fr_literal, | |
2731 | fragP->fr_literal + fragP->fr_fix, | |
2732 | fragP->fr_var); | |
2733 | newf->fr_type = rs_fill; | |
20f5cfbd | 2734 | newf->fr_address = address + fragP->fr_fix + newoff; |
d1c5f158 AM |
2735 | newf->fr_fix = 0; |
2736 | newf->fr_offset = (((offsetT) 1 << fragP->fr_offset) | |
2737 | / fragP->fr_var); | |
2738 | if (newf->fr_offset * newf->fr_var | |
2739 | != (offsetT) 1 << fragP->fr_offset) | |
2740 | { | |
2741 | newf->fr_offset = (offsetT) 1 << fragP->fr_offset; | |
2742 | newf->fr_var = 1; | |
2743 | } | |
20f5cfbd | 2744 | /* Include size of new frag in GROWTH. */ |
d1c5f158 | 2745 | growth += newf->fr_offset * newf->fr_var; |
20f5cfbd AM |
2746 | /* Adjust the new frag address for the amount |
2747 | we'll add when we process the new frag. */ | |
2748 | newf->fr_address -= stretch + growth; | |
d1c5f158 AM |
2749 | newf->relax_marker ^= 1; |
2750 | fragP->fr_next = newf; | |
2751 | #ifdef DEBUG | |
2752 | as_warn (_("padding added")); | |
2753 | #endif | |
2754 | } | |
252b5132 RH |
2755 | } |
2756 | break; | |
2757 | ||
2758 | case rs_org: | |
2759 | { | |
e46d99eb AM |
2760 | addressT target = offset; |
2761 | addressT after; | |
252b5132 RH |
2762 | |
2763 | if (symbolP) | |
2764 | { | |
b4b24b79 AM |
2765 | /* Convert from an actual address to an octet offset |
2766 | into the section. Here it is assumed that the | |
2767 | section's VMA is zero, and can omit subtracting it | |
2768 | from the symbol's value to get the address offset. */ | |
2769 | know (S_GET_SEGMENT (symbolP)->vma == 0); | |
6e917903 | 2770 | target += S_GET_VALUE (symbolP) * OCTETS_PER_BYTE; |
ac62c346 | 2771 | } |
252b5132 RH |
2772 | |
2773 | know (fragP->fr_next); | |
6afe8e98 | 2774 | after = fragP->fr_next->fr_address + stretch; |
252b5132 | 2775 | growth = target - after; |
9875b365 MR |
2776 | |
2777 | /* Growth may be negative, but variable part of frag | |
2778 | cannot have fewer than 0 chars. That is, we can't | |
2779 | .org backwards. */ | |
2780 | if (address + fragP->fr_fix > target) | |
252b5132 | 2781 | { |
32638454 AM |
2782 | growth = 0; |
2783 | ||
2784 | /* Don't error on first few frag relax passes. | |
2785 | The symbol might be an expression involving | |
2786 | symbol values from other sections. If those | |
2787 | sections have not yet been processed their | |
2788 | frags will all have zero addresses, so we | |
2789 | will calculate incorrect values for them. The | |
2790 | number of passes we allow before giving an | |
2791 | error is somewhat arbitrary. It should be at | |
2792 | least one, with larger values requiring | |
2793 | increasingly contrived dependencies between | |
2794 | frags to trigger a false error. */ | |
2795 | if (pass < 2) | |
2796 | { | |
2797 | /* Force another pass. */ | |
2798 | ret = 1; | |
2799 | break; | |
2800 | } | |
2801 | ||
14ad458a | 2802 | as_bad_where (fragP->fr_file, fragP->fr_line, |
685736be | 2803 | _("attempt to move .org backwards")); |
14ad458a ILT |
2804 | |
2805 | /* We've issued an error message. Change the | |
b4b24b79 | 2806 | frag to avoid cascading errors. */ |
14ad458a ILT |
2807 | fragP->fr_type = rs_align; |
2808 | fragP->fr_subtype = 0; | |
2809 | fragP->fr_offset = 0; | |
6afe8e98 | 2810 | fragP->fr_fix = after - address; |
252b5132 | 2811 | } |
252b5132 | 2812 | } |
6afe8e98 | 2813 | break; |
252b5132 RH |
2814 | |
2815 | case rs_space: | |
62a02d25 | 2816 | case rs_space_nop: |
54d3cad9 | 2817 | growth = 0; |
252b5132 RH |
2818 | if (symbolP) |
2819 | { | |
766c03c9 AM |
2820 | offsetT amount; |
2821 | ||
2822 | amount = S_GET_VALUE (symbolP); | |
9e40345d | 2823 | if (S_GET_SEGMENT (symbolP) != absolute_section |
252b5132 RH |
2824 | || S_IS_COMMON (symbolP) |
2825 | || ! S_IS_DEFINED (symbolP)) | |
252b5132 | 2826 | { |
54d3cad9 AM |
2827 | as_bad_where (fragP->fr_file, fragP->fr_line, |
2828 | _(".space specifies non-absolute value")); | |
2829 | /* Prevent repeat of this error message. */ | |
2830 | fragP->fr_symbol = 0; | |
2831 | } | |
2832 | else if (amount < 0) | |
2833 | { | |
32638454 AM |
2834 | /* Don't error on first few frag relax passes. |
2835 | See rs_org comment for a longer explanation. */ | |
2836 | if (pass < 2) | |
2837 | { | |
2838 | ret = 1; | |
2839 | break; | |
2840 | } | |
2841 | ||
54d3cad9 | 2842 | as_warn_where (fragP->fr_file, fragP->fr_line, |
8f065d3b | 2843 | _(".space, .nops or .fill with negative value, ignored")); |
766c03c9 | 2844 | fragP->fr_symbol = 0; |
252b5132 | 2845 | } |
54d3cad9 | 2846 | else |
050be34e | 2847 | growth = (was_address + fragP->fr_fix + amount |
54d3cad9 | 2848 | - fragP->fr_next->fr_address); |
252b5132 | 2849 | } |
252b5132 RH |
2850 | break; |
2851 | ||
2852 | case rs_machine_dependent: | |
2853 | #ifdef md_relax_frag | |
c842b53a | 2854 | growth = md_relax_frag (segment, fragP, stretch); |
252b5132 RH |
2855 | #else |
2856 | #ifdef TC_GENERIC_RELAX_TABLE | |
2857 | /* The default way to relax a frag is to look through | |
2858 | TC_GENERIC_RELAX_TABLE. */ | |
c842b53a | 2859 | growth = relax_frag (segment, fragP, stretch); |
efaf0ba4 | 2860 | #endif /* TC_GENERIC_RELAX_TABLE */ |
252b5132 RH |
2861 | #endif |
2862 | break; | |
2863 | ||
2864 | case rs_leb128: | |
2865 | { | |
2866 | valueT value; | |
685736be | 2867 | offsetT size; |
252b5132 | 2868 | |
6386f3a7 | 2869 | value = resolve_symbol_value (fragP->fr_symbol); |
252b5132 RH |
2870 | size = sizeof_leb128 (value, fragP->fr_subtype); |
2871 | growth = size - fragP->fr_offset; | |
2872 | fragP->fr_offset = size; | |
2873 | } | |
2874 | break; | |
2875 | ||
2876 | case rs_cfa: | |
2877 | growth = eh_frame_relax_frag (fragP); | |
2878 | break; | |
2879 | ||
220e750f RH |
2880 | case rs_dwarf2dbg: |
2881 | growth = dwarf2dbg_relax_frag (fragP); | |
2882 | break; | |
2883 | ||
252b5132 RH |
2884 | default: |
2885 | BAD_CASE (fragP->fr_type); | |
2886 | break; | |
2887 | } | |
2888 | if (growth) | |
2889 | { | |
2890 | stretch += growth; | |
e46d99eb | 2891 | stretched = 1; |
d1c5f158 AM |
2892 | if (fragP->fr_type == rs_leb128) |
2893 | rs_leb128_fudge += 16; | |
2894 | else if (fragP->fr_type == rs_align | |
2895 | && (rs_leb128_fudge & 16) != 0 | |
2896 | && stretch == 0) | |
2897 | rs_leb128_fudge += 16; | |
2898 | else | |
2899 | rs_leb128_fudge = 0; | |
252b5132 | 2900 | } |
4111faa5 | 2901 | } |
d1c5f158 AM |
2902 | |
2903 | if (stretch == 0 | |
2904 | && (rs_leb128_fudge & 16) == 0 | |
2905 | && (rs_leb128_fudge & -16) != 0) | |
2906 | rs_leb128_fudge += 1; | |
2907 | else | |
2908 | rs_leb128_fudge = 0; | |
252b5132 | 2909 | } |
4111faa5 NC |
2910 | /* Until nothing further to relax. */ |
2911 | while (stretched && -- max_iterations); | |
2912 | ||
2913 | if (stretched) | |
2914 | as_fatal (_("Infinite loop encountered whilst attempting to compute the addresses of symbols in section %s"), | |
2915 | segment_name (segment)); | |
2916 | } | |
252b5132 | 2917 | |
e46d99eb AM |
2918 | for (fragP = segment_frag_root; fragP; fragP = fragP->fr_next) |
2919 | if (fragP->last_fr_address != fragP->fr_address) | |
2920 | { | |
2921 | fragP->last_fr_address = fragP->fr_address; | |
2922 | ret = 1; | |
2923 | } | |
2924 | return ret; | |
efaf0ba4 | 2925 | } |
252b5132 | 2926 | |
252b5132 | 2927 | void |
d7342424 | 2928 | number_to_chars_bigendian (char *buf, valueT val, int n) |
252b5132 | 2929 | { |
937149dd | 2930 | if (n <= 0) |
252b5132 RH |
2931 | abort (); |
2932 | while (n--) | |
2933 | { | |
2934 | buf[n] = val & 0xff; | |
2935 | val >>= 8; | |
2936 | } | |
2937 | } | |
2938 | ||
2939 | void | |
d7342424 | 2940 | number_to_chars_littleendian (char *buf, valueT val, int n) |
252b5132 | 2941 | { |
937149dd | 2942 | if (n <= 0) |
252b5132 RH |
2943 | abort (); |
2944 | while (n--) | |
2945 | { | |
2946 | *buf++ = val & 0xff; | |
2947 | val >>= 8; | |
2948 | } | |
2949 | } | |
2950 | ||
2951 | void | |
d7342424 | 2952 | write_print_statistics (FILE *file) |
252b5132 | 2953 | { |
6d4d30bb | 2954 | fprintf (file, "fixups: %d\n", n_fixups); |
252b5132 RH |
2955 | } |
2956 | ||
efaf0ba4 | 2957 | /* For debugging. */ |
252b5132 RH |
2958 | extern int indent_level; |
2959 | ||
2960 | void | |
d7342424 | 2961 | print_fixup (fixS *fixp) |
252b5132 RH |
2962 | { |
2963 | indent_level = 1; | |
d2df793a NC |
2964 | fprintf (stderr, "fix "); |
2965 | fprintf_vma (stderr, (bfd_vma)((bfd_hostptr_t) fixp)); | |
2966 | fprintf (stderr, " %s:%d",fixp->fx_file, fixp->fx_line); | |
252b5132 RH |
2967 | if (fixp->fx_pcrel) |
2968 | fprintf (stderr, " pcrel"); | |
2969 | if (fixp->fx_pcrel_adjust) | |
2970 | fprintf (stderr, " pcrel_adjust=%d", fixp->fx_pcrel_adjust); | |
2971 | if (fixp->fx_im_disp) | |
2972 | { | |
2973 | #ifdef TC_NS32K | |
2974 | fprintf (stderr, " im_disp=%d", fixp->fx_im_disp); | |
2975 | #else | |
2976 | fprintf (stderr, " im_disp"); | |
2977 | #endif | |
2978 | } | |
2979 | if (fixp->fx_tcbit) | |
2980 | fprintf (stderr, " tcbit"); | |
2981 | if (fixp->fx_done) | |
2982 | fprintf (stderr, " done"); | |
d2df793a NC |
2983 | fprintf (stderr, "\n size=%d frag=", fixp->fx_size); |
2984 | fprintf_vma (stderr, (bfd_vma) ((bfd_hostptr_t) fixp->fx_frag)); | |
2985 | fprintf (stderr, " where=%ld offset=%lx addnumber=%lx", | |
2986 | (long) fixp->fx_where, | |
0af1713e AM |
2987 | (unsigned long) fixp->fx_offset, |
2988 | (unsigned long) fixp->fx_addnumber); | |
252b5132 RH |
2989 | fprintf (stderr, "\n %s (%d)", bfd_get_reloc_code_name (fixp->fx_r_type), |
2990 | fixp->fx_r_type); | |
252b5132 RH |
2991 | if (fixp->fx_addsy) |
2992 | { | |
2993 | fprintf (stderr, "\n +<"); | |
2994 | print_symbol_value_1 (stderr, fixp->fx_addsy); | |
2995 | fprintf (stderr, ">"); | |
2996 | } | |
2997 | if (fixp->fx_subsy) | |
2998 | { | |
2999 | fprintf (stderr, "\n -<"); | |
3000 | print_symbol_value_1 (stderr, fixp->fx_subsy); | |
3001 | fprintf (stderr, ">"); | |
3002 | } | |
3003 | fprintf (stderr, "\n"); | |
3004 | #ifdef TC_FIX_DATA_PRINT | |
3005 | TC_FIX_DATA_PRINT (stderr, fixp); | |
3006 | #endif | |
3007 | } |