Commit | Line | Data |
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54cfded0 | 1 | /* dw2gencfi.c - Support for generating Dwarf2 CFI information. |
72b016b4 | 2 | Copyright 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 |
1fbfe785 | 3 | Free Software Foundation, Inc. |
54cfded0 AM |
4 | Contributed by Michal Ludvig <mludvig@suse.cz> |
5 | ||
6 | This file is part of GAS, the GNU Assembler. | |
7 | ||
8 | GAS is free software; you can redistribute it and/or modify | |
9 | it under the terms of the GNU General Public License as published by | |
ec2655a6 | 10 | the Free Software Foundation; either version 3, or (at your option) |
54cfded0 AM |
11 | any later version. |
12 | ||
13 | GAS is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with GAS; see the file COPYING. If not, write to the Free | |
4b4da160 NC |
20 | Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA |
21 | 02110-1301, USA. */ | |
54cfded0 | 22 | |
54cfded0 AM |
23 | #include "as.h" |
24 | #include "dw2gencfi.h" | |
ae424f82 | 25 | #include "subsegs.h" |
38462edf | 26 | #include "dwarf2dbg.h" |
54cfded0 | 27 | |
0a7b15ff | 28 | #ifdef TARGET_USE_CFIPOP |
a4447b93 | 29 | |
3dd24306 DA |
30 | /* By default, use difference expressions if DIFF_EXPR_OK is defined. */ |
31 | #ifndef CFI_DIFF_EXPR_OK | |
32 | # ifdef DIFF_EXPR_OK | |
33 | # define CFI_DIFF_EXPR_OK 1 | |
34 | # else | |
35 | # define CFI_DIFF_EXPR_OK 0 | |
36 | # endif | |
37 | #endif | |
38 | ||
2c678708 | 39 | #ifndef CFI_DIFF_LSDA_OK |
72b016b4 | 40 | #define CFI_DIFF_LSDA_OK CFI_DIFF_EXPR_OK |
2c678708 MK |
41 | #endif |
42 | ||
43 | #if CFI_DIFF_EXPR_OK == 1 && CFI_DIFF_LSDA_OK == 0 | |
44 | # error "CFI_DIFF_EXPR_OK should imply CFI_DIFF_LSDA_OK" | |
45 | #endif | |
46 | ||
a4447b93 RH |
47 | /* We re-use DWARF2_LINE_MIN_INSN_LENGTH for the code alignment field |
48 | of the CIE. Default to 1 if not otherwise specified. */ | |
72b016b4 NC |
49 | #ifndef DWARF2_LINE_MIN_INSN_LENGTH |
50 | #define DWARF2_LINE_MIN_INSN_LENGTH 1 | |
a4447b93 RH |
51 | #endif |
52 | ||
8c9b70b1 RH |
53 | /* By default, use 32-bit relocations from .eh_frame into .text. */ |
54 | #ifndef DWARF2_FDE_RELOC_SIZE | |
72b016b4 | 55 | #define DWARF2_FDE_RELOC_SIZE 4 |
8c9b70b1 RH |
56 | #endif |
57 | ||
58 | /* By default, use a read-only .eh_frame section. */ | |
59 | #ifndef DWARF2_EH_FRAME_READ_ONLY | |
72b016b4 | 60 | #define DWARF2_EH_FRAME_READ_ONLY SEC_READONLY |
8c9b70b1 RH |
61 | #endif |
62 | ||
9393cb0d | 63 | #ifndef EH_FRAME_ALIGNMENT |
72b016b4 | 64 | #define EH_FRAME_ALIGNMENT (bfd_get_arch_size (stdoutput) == 64 ? 3 : 2) |
9393cb0d JJ |
65 | #endif |
66 | ||
a4447b93 | 67 | #ifndef tc_cfi_frame_initial_instructions |
72b016b4 | 68 | #define tc_cfi_frame_initial_instructions() ((void)0) |
a4447b93 RH |
69 | #endif |
70 | ||
38462edf | 71 | #ifndef DWARF2_FORMAT |
72b016b4 | 72 | #define DWARF2_FORMAT(SEC) dwarf2_format_32bit |
38462edf JJ |
73 | #endif |
74 | ||
f1c4cc75 | 75 | #ifndef DWARF2_ADDR_SIZE |
72b016b4 | 76 | #define DWARF2_ADDR_SIZE(bfd) (bfd_arch_bits_per_address (bfd) / 8) |
f1c4cc75 RH |
77 | #endif |
78 | ||
72b016b4 NC |
79 | /* Private segment collection list. */ |
80 | struct dwcfi_seg_list | |
81 | { | |
82 | segT seg; | |
83 | int subseg; | |
84 | char * seg_name; | |
85 | }; | |
86 | ||
87 | #define FRAME_NAME ".eh_frame" | |
88 | ||
89 | static struct hash_control *dwcfi_hash; | |
90 | ||
91 | /* Build based on segment the derived .debug_... | |
92 | segment name containing origin segment's postfix name part. */ | |
93 | ||
94 | static char * | |
95 | get_debugseg_name (segT seg, const char *base_name) | |
96 | { | |
97 | const char *name; | |
98 | ||
99 | if (!seg) | |
100 | name = ""; | |
101 | else | |
102 | { | |
103 | const char * dollar; | |
104 | const char * dot; | |
105 | ||
106 | name = bfd_get_section_name (stdoutput, seg); | |
107 | ||
108 | dollar = strchr (name, '$'); | |
109 | dot = strchr (name + 1, '.'); | |
110 | ||
111 | if (!dollar && !dot) | |
112 | name = ""; | |
113 | else if (!dollar) | |
114 | name = dot; | |
115 | else if (!dot) | |
116 | name = dollar; | |
117 | else if (dot < dollar) | |
118 | name = dot; | |
119 | else | |
120 | name = dollar; | |
121 | } | |
122 | ||
123 | return concat (base_name, name, NULL); | |
124 | } | |
125 | ||
126 | /* Allocate a dwcfi_seg_list structure. */ | |
127 | ||
128 | static struct dwcfi_seg_list * | |
129 | alloc_debugseg_item (segT seg, int subseg, char *name) | |
130 | { | |
131 | struct dwcfi_seg_list *r; | |
132 | ||
133 | r = (struct dwcfi_seg_list *) | |
134 | xmalloc (sizeof (struct dwcfi_seg_list) + strlen (name)); | |
135 | r->seg = seg; | |
136 | r->subseg = subseg; | |
137 | r->seg_name = name; | |
138 | return r; | |
139 | } | |
140 | ||
141 | static segT | |
142 | is_now_linkonce_segment (void) | |
143 | { | |
144 | #if defined (TE_PE) || defined (TE_PEP) | |
145 | if ((bfd_get_section_flags (stdoutput, now_seg) | |
146 | & (SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD | |
147 | | SEC_LINK_DUPLICATES_ONE_ONLY | SEC_LINK_DUPLICATES_SAME_SIZE | |
148 | | SEC_LINK_DUPLICATES_SAME_CONTENTS)) != 0) | |
149 | return now_seg; | |
150 | #endif | |
151 | return NULL; | |
152 | } | |
153 | ||
154 | /* Generate debug... segment with same linkonce properties | |
155 | of based segment. */ | |
156 | ||
157 | static segT | |
158 | make_debug_seg (segT cseg, char *name, int sflags) | |
159 | { | |
160 | segT save_seg = now_seg; | |
161 | int save_subseg = now_subseg; | |
162 | segT r; | |
163 | flagword flags; | |
164 | ||
165 | r = subseg_new (name, 0); | |
166 | ||
167 | /* Check if code segment is marked as linked once. */ | |
168 | if (!cseg) | |
169 | flags = 0; | |
170 | else | |
171 | flags = bfd_get_section_flags (stdoutput, cseg) | |
172 | & (SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD | |
173 | | SEC_LINK_DUPLICATES_ONE_ONLY | SEC_LINK_DUPLICATES_SAME_SIZE | |
174 | | SEC_LINK_DUPLICATES_SAME_CONTENTS); | |
175 | ||
176 | /* Add standard section flags. */ | |
177 | flags |= sflags; | |
178 | ||
179 | /* Apply possibly linked once flags to new generated segment, too. */ | |
180 | if (!bfd_set_section_flags (stdoutput, r, flags)) | |
181 | as_bad (_("bfd_set_section_flags: %s"), | |
182 | bfd_errmsg (bfd_get_error ())); | |
183 | ||
184 | /* Restore to previous segment. */ | |
185 | if (save_seg != NULL) | |
186 | subseg_set (save_seg, save_subseg); | |
187 | return r; | |
188 | } | |
189 | ||
190 | static void | |
191 | dwcfi_hash_insert (const char *name, struct dwcfi_seg_list *item) | |
192 | { | |
193 | const char *error_string; | |
194 | ||
195 | if ((error_string = hash_jam (dwcfi_hash, name, (char *) item))) | |
196 | as_fatal (_("Inserting \"%s\" into structure table failed: %s"), | |
197 | name, error_string); | |
198 | } | |
199 | ||
200 | static struct dwcfi_seg_list * | |
201 | dwcfi_hash_find (char *name) | |
202 | { | |
203 | return (struct dwcfi_seg_list *) hash_find (dwcfi_hash, name); | |
204 | } | |
205 | ||
206 | static struct dwcfi_seg_list * | |
207 | dwcfi_hash_find_or_make (segT cseg, const char *base_name, int flags) | |
208 | { | |
209 | struct dwcfi_seg_list *item; | |
210 | char *name; | |
211 | ||
212 | /* Initialize dwcfi_hash once. */ | |
213 | if (!dwcfi_hash) | |
214 | dwcfi_hash = hash_new (); | |
215 | ||
216 | name = get_debugseg_name (cseg, base_name); | |
217 | ||
218 | item = dwcfi_hash_find (name); | |
219 | if (!item) | |
220 | { | |
221 | item = alloc_debugseg_item (make_debug_seg (cseg, name, flags), 0, name); | |
222 | ||
223 | dwcfi_hash_insert (item->seg_name, item); | |
224 | } | |
225 | else | |
226 | free (name); | |
227 | ||
228 | return item; | |
229 | } | |
230 | ||
3251495b RH |
231 | /* ??? Share this with dwarf2cfg.c. */ |
232 | #ifndef TC_DWARF2_EMIT_OFFSET | |
233 | #define TC_DWARF2_EMIT_OFFSET generic_dwarf2_emit_offset | |
234 | ||
235 | /* Create an offset to .dwarf2_*. */ | |
236 | ||
237 | static void | |
238 | generic_dwarf2_emit_offset (symbolS *symbol, unsigned int size) | |
239 | { | |
240 | expressionS exp; | |
241 | ||
242 | exp.X_op = O_symbol; | |
243 | exp.X_add_symbol = symbol; | |
244 | exp.X_add_number = 0; | |
245 | emit_expr (&exp, size); | |
246 | } | |
247 | #endif | |
248 | ||
72b016b4 NC |
249 | struct cfi_escape_data |
250 | { | |
1e9cc1c2 NC |
251 | struct cfi_escape_data *next; |
252 | expressionS exp; | |
253 | }; | |
a4447b93 RH |
254 | |
255 | struct cfi_insn_data | |
39b82151 | 256 | { |
a4447b93 | 257 | struct cfi_insn_data *next; |
72b016b4 | 258 | segT cur_seg; |
a4447b93 | 259 | int insn; |
72b016b4 NC |
260 | union |
261 | { | |
262 | struct | |
263 | { | |
a4447b93 RH |
264 | unsigned reg; |
265 | offsetT offset; | |
266 | } ri; | |
267 | ||
72b016b4 NC |
268 | struct |
269 | { | |
a4447b93 RH |
270 | unsigned reg1; |
271 | unsigned reg2; | |
272 | } rr; | |
273 | ||
274 | unsigned r; | |
275 | offsetT i; | |
276 | ||
72b016b4 NC |
277 | struct |
278 | { | |
a4447b93 RH |
279 | symbolS *lab1; |
280 | symbolS *lab2; | |
281 | } ll; | |
cdfbf930 | 282 | |
1e9cc1c2 | 283 | struct cfi_escape_data *esc; |
f1c4cc75 | 284 | |
72b016b4 NC |
285 | struct |
286 | { | |
f1c4cc75 RH |
287 | unsigned reg, encoding; |
288 | expressionS exp; | |
289 | } ea; | |
a4447b93 | 290 | } u; |
39b82151 ML |
291 | }; |
292 | ||
a4447b93 | 293 | struct fde_entry |
39b82151 | 294 | { |
a4447b93 | 295 | struct fde_entry *next; |
72b016b4 | 296 | segT cseg; |
a4447b93 RH |
297 | symbolS *start_address; |
298 | symbolS *end_address; | |
299 | struct cfi_insn_data *data; | |
300 | struct cfi_insn_data **last; | |
9b8ae42e JJ |
301 | unsigned char per_encoding; |
302 | unsigned char lsda_encoding; | |
303 | expressionS personality; | |
304 | expressionS lsda; | |
a4447b93 | 305 | unsigned int return_column; |
63752a75 | 306 | unsigned int signal_frame; |
72b016b4 | 307 | int handled; |
39b82151 ML |
308 | }; |
309 | ||
a4447b93 | 310 | struct cie_entry |
39b82151 | 311 | { |
a4447b93 | 312 | struct cie_entry *next; |
72b016b4 | 313 | segT cur_seg; |
a4447b93 RH |
314 | symbolS *start_address; |
315 | unsigned int return_column; | |
63752a75 | 316 | unsigned int signal_frame; |
9b8ae42e JJ |
317 | unsigned char per_encoding; |
318 | unsigned char lsda_encoding; | |
319 | expressionS personality; | |
a4447b93 | 320 | struct cfi_insn_data *first, *last; |
39b82151 ML |
321 | }; |
322 | ||
a4447b93 | 323 | /* List of FDE entries. */ |
72b016b4 | 324 | |
a4447b93 RH |
325 | static struct fde_entry *all_fde_data; |
326 | static struct fde_entry **last_fde_data = &all_fde_data; | |
39b82151 ML |
327 | |
328 | /* List of CIEs so that they could be reused. */ | |
329 | static struct cie_entry *cie_root; | |
330 | ||
fa87b337 RH |
331 | /* Stack of old CFI data, for save/restore. */ |
332 | struct cfa_save_data | |
333 | { | |
334 | struct cfa_save_data *next; | |
335 | offsetT cfa_offset; | |
336 | }; | |
337 | ||
ae424f82 JJ |
338 | /* Current open FDE entry. */ |
339 | struct frch_cfi_data | |
340 | { | |
341 | struct fde_entry *cur_fde_data; | |
342 | symbolS *last_address; | |
343 | offsetT cur_cfa_offset; | |
344 | struct cfa_save_data *cfa_save_stack; | |
345 | }; | |
a4447b93 RH |
346 | \f |
347 | /* Construct a new FDE structure and add it to the end of the fde list. */ | |
54cfded0 | 348 | |
a4447b93 RH |
349 | static struct fde_entry * |
350 | alloc_fde_entry (void) | |
351 | { | |
1e9cc1c2 NC |
352 | struct fde_entry *fde = (struct fde_entry *) |
353 | xcalloc (1, sizeof (struct fde_entry)); | |
54cfded0 | 354 | |
1e9cc1c2 NC |
355 | frchain_now->frch_cfi_data = (struct frch_cfi_data *) |
356 | xcalloc (1, sizeof (struct frch_cfi_data)); | |
ae424f82 | 357 | frchain_now->frch_cfi_data->cur_fde_data = fde; |
a4447b93 RH |
358 | *last_fde_data = fde; |
359 | last_fde_data = &fde->next; | |
72b016b4 NC |
360 | fde->cseg = is_now_linkonce_segment (); |
361 | fde->handled = 0; | |
a4447b93 RH |
362 | fde->last = &fde->data; |
363 | fde->return_column = DWARF2_DEFAULT_RETURN_COLUMN; | |
9b8ae42e JJ |
364 | fde->per_encoding = DW_EH_PE_omit; |
365 | fde->lsda_encoding = DW_EH_PE_omit; | |
a4447b93 RH |
366 | |
367 | return fde; | |
368 | } | |
369 | ||
370 | /* The following functions are available for a backend to construct its | |
371 | own unwind information, usually from legacy unwind directives. */ | |
372 | ||
373 | /* Construct a new INSN structure and add it to the end of the insn list | |
374 | for the currently active FDE. */ | |
375 | ||
376 | static struct cfi_insn_data * | |
377 | alloc_cfi_insn_data (void) | |
54cfded0 | 378 | { |
1e9cc1c2 NC |
379 | struct cfi_insn_data *insn = (struct cfi_insn_data *) |
380 | xcalloc (1, sizeof (struct cfi_insn_data)); | |
ae424f82 | 381 | struct fde_entry *cur_fde_data = frchain_now->frch_cfi_data->cur_fde_data; |
a4447b93 RH |
382 | |
383 | *cur_fde_data->last = insn; | |
384 | cur_fde_data->last = &insn->next; | |
72b016b4 | 385 | insn->cur_seg = is_now_linkonce_segment (); |
54cfded0 | 386 | |
a4447b93 | 387 | return insn; |
54cfded0 AM |
388 | } |
389 | ||
a4447b93 RH |
390 | /* Construct a new FDE structure that begins at LABEL. */ |
391 | ||
72b016b4 | 392 | void |
a4447b93 | 393 | cfi_new_fde (symbolS *label) |
54cfded0 | 394 | { |
a4447b93 RH |
395 | struct fde_entry *fde = alloc_fde_entry (); |
396 | fde->start_address = label; | |
ae424f82 | 397 | frchain_now->frch_cfi_data->last_address = label; |
54cfded0 AM |
398 | } |
399 | ||
a4447b93 RH |
400 | /* End the currently open FDE. */ |
401 | ||
72b016b4 | 402 | void |
a4447b93 | 403 | cfi_end_fde (symbolS *label) |
54cfded0 | 404 | { |
ae424f82 JJ |
405 | frchain_now->frch_cfi_data->cur_fde_data->end_address = label; |
406 | free (frchain_now->frch_cfi_data); | |
407 | frchain_now->frch_cfi_data = NULL; | |
54cfded0 AM |
408 | } |
409 | ||
a4447b93 RH |
410 | /* Set the return column for the current FDE. */ |
411 | ||
412 | void | |
413 | cfi_set_return_column (unsigned regno) | |
54cfded0 | 414 | { |
ae424f82 | 415 | frchain_now->frch_cfi_data->cur_fde_data->return_column = regno; |
a4447b93 | 416 | } |
54cfded0 | 417 | |
2be24b54 ML |
418 | /* Universal functions to store new instructions. */ |
419 | ||
420 | static void | |
72b016b4 | 421 | cfi_add_CFA_insn (int insn) |
2be24b54 ML |
422 | { |
423 | struct cfi_insn_data *insn_ptr = alloc_cfi_insn_data (); | |
424 | ||
425 | insn_ptr->insn = insn; | |
426 | } | |
427 | ||
428 | static void | |
429 | cfi_add_CFA_insn_reg (int insn, unsigned regno) | |
430 | { | |
431 | struct cfi_insn_data *insn_ptr = alloc_cfi_insn_data (); | |
432 | ||
433 | insn_ptr->insn = insn; | |
434 | insn_ptr->u.r = regno; | |
435 | } | |
436 | ||
437 | static void | |
438 | cfi_add_CFA_insn_offset (int insn, offsetT offset) | |
439 | { | |
440 | struct cfi_insn_data *insn_ptr = alloc_cfi_insn_data (); | |
441 | ||
442 | insn_ptr->insn = insn; | |
443 | insn_ptr->u.i = offset; | |
444 | } | |
445 | ||
446 | static void | |
447 | cfi_add_CFA_insn_reg_reg (int insn, unsigned reg1, unsigned reg2) | |
448 | { | |
449 | struct cfi_insn_data *insn_ptr = alloc_cfi_insn_data (); | |
450 | ||
451 | insn_ptr->insn = insn; | |
452 | insn_ptr->u.rr.reg1 = reg1; | |
453 | insn_ptr->u.rr.reg2 = reg2; | |
454 | } | |
455 | ||
456 | static void | |
457 | cfi_add_CFA_insn_reg_offset (int insn, unsigned regno, offsetT offset) | |
458 | { | |
459 | struct cfi_insn_data *insn_ptr = alloc_cfi_insn_data (); | |
460 | ||
461 | insn_ptr->insn = insn; | |
462 | insn_ptr->u.ri.reg = regno; | |
463 | insn_ptr->u.ri.offset = offset; | |
464 | } | |
465 | ||
a4447b93 | 466 | /* Add a CFI insn to advance the PC from the last address to LABEL. */ |
54cfded0 | 467 | |
a4447b93 RH |
468 | void |
469 | cfi_add_advance_loc (symbolS *label) | |
470 | { | |
471 | struct cfi_insn_data *insn = alloc_cfi_insn_data (); | |
7c0295b1 | 472 | |
a4447b93 | 473 | insn->insn = DW_CFA_advance_loc; |
ae424f82 | 474 | insn->u.ll.lab1 = frchain_now->frch_cfi_data->last_address; |
a4447b93 | 475 | insn->u.ll.lab2 = label; |
54cfded0 | 476 | |
ae424f82 | 477 | frchain_now->frch_cfi_data->last_address = label; |
a4447b93 | 478 | } |
54cfded0 | 479 | |
a4447b93 RH |
480 | /* Add a DW_CFA_offset record to the CFI data. */ |
481 | ||
482 | void | |
483 | cfi_add_CFA_offset (unsigned regno, offsetT offset) | |
484 | { | |
fa87b337 RH |
485 | unsigned int abs_data_align; |
486 | ||
9c2799c2 | 487 | gas_assert (DWARF2_CIE_DATA_ALIGNMENT != 0); |
2be24b54 | 488 | cfi_add_CFA_insn_reg_offset (DW_CFA_offset, regno, offset); |
fa87b337 RH |
489 | |
490 | abs_data_align = (DWARF2_CIE_DATA_ALIGNMENT < 0 | |
491 | ? -DWARF2_CIE_DATA_ALIGNMENT : DWARF2_CIE_DATA_ALIGNMENT); | |
492 | if (offset % abs_data_align) | |
493 | as_bad (_("register save offset not a multiple of %u"), abs_data_align); | |
a4447b93 | 494 | } |
54cfded0 | 495 | |
a4447b93 | 496 | /* Add a DW_CFA_def_cfa record to the CFI data. */ |
54cfded0 | 497 | |
a4447b93 RH |
498 | void |
499 | cfi_add_CFA_def_cfa (unsigned regno, offsetT offset) | |
500 | { | |
2be24b54 | 501 | cfi_add_CFA_insn_reg_offset (DW_CFA_def_cfa, regno, offset); |
ae424f82 | 502 | frchain_now->frch_cfi_data->cur_cfa_offset = offset; |
54cfded0 AM |
503 | } |
504 | ||
a4447b93 RH |
505 | /* Add a DW_CFA_register record to the CFI data. */ |
506 | ||
507 | void | |
508 | cfi_add_CFA_register (unsigned reg1, unsigned reg2) | |
54cfded0 | 509 | { |
2be24b54 | 510 | cfi_add_CFA_insn_reg_reg (DW_CFA_register, reg1, reg2); |
54cfded0 AM |
511 | } |
512 | ||
a4447b93 RH |
513 | /* Add a DW_CFA_def_cfa_register record to the CFI data. */ |
514 | ||
515 | void | |
516 | cfi_add_CFA_def_cfa_register (unsigned regno) | |
54cfded0 | 517 | { |
2be24b54 | 518 | cfi_add_CFA_insn_reg (DW_CFA_def_cfa_register, regno); |
54cfded0 AM |
519 | } |
520 | ||
a4447b93 RH |
521 | /* Add a DW_CFA_def_cfa_offset record to the CFI data. */ |
522 | ||
54cfded0 | 523 | void |
a4447b93 | 524 | cfi_add_CFA_def_cfa_offset (offsetT offset) |
54cfded0 | 525 | { |
2be24b54 | 526 | cfi_add_CFA_insn_offset (DW_CFA_def_cfa_offset, offset); |
ae424f82 | 527 | frchain_now->frch_cfi_data->cur_cfa_offset = offset; |
a4447b93 | 528 | } |
54cfded0 | 529 | |
2be24b54 ML |
530 | void |
531 | cfi_add_CFA_restore (unsigned regno) | |
532 | { | |
533 | cfi_add_CFA_insn_reg (DW_CFA_restore, regno); | |
534 | } | |
535 | ||
536 | void | |
537 | cfi_add_CFA_undefined (unsigned regno) | |
538 | { | |
539 | cfi_add_CFA_insn_reg (DW_CFA_undefined, regno); | |
540 | } | |
541 | ||
542 | void | |
543 | cfi_add_CFA_same_value (unsigned regno) | |
544 | { | |
545 | cfi_add_CFA_insn_reg (DW_CFA_same_value, regno); | |
546 | } | |
547 | ||
548 | void | |
549 | cfi_add_CFA_remember_state (void) | |
550 | { | |
fa87b337 RH |
551 | struct cfa_save_data *p; |
552 | ||
2be24b54 | 553 | cfi_add_CFA_insn (DW_CFA_remember_state); |
fa87b337 | 554 | |
1e9cc1c2 | 555 | p = (struct cfa_save_data *) xmalloc (sizeof (*p)); |
ae424f82 JJ |
556 | p->cfa_offset = frchain_now->frch_cfi_data->cur_cfa_offset; |
557 | p->next = frchain_now->frch_cfi_data->cfa_save_stack; | |
558 | frchain_now->frch_cfi_data->cfa_save_stack = p; | |
2be24b54 ML |
559 | } |
560 | ||
561 | void | |
562 | cfi_add_CFA_restore_state (void) | |
563 | { | |
fa87b337 RH |
564 | struct cfa_save_data *p; |
565 | ||
2be24b54 | 566 | cfi_add_CFA_insn (DW_CFA_restore_state); |
fa87b337 | 567 | |
ae424f82 | 568 | p = frchain_now->frch_cfi_data->cfa_save_stack; |
fa87b337 RH |
569 | if (p) |
570 | { | |
ae424f82 JJ |
571 | frchain_now->frch_cfi_data->cur_cfa_offset = p->cfa_offset; |
572 | frchain_now->frch_cfi_data->cfa_save_stack = p->next; | |
fa87b337 RH |
573 | free (p); |
574 | } | |
289040ca NC |
575 | else |
576 | as_bad (_("CFI state restore without previous remember")); | |
2be24b54 ML |
577 | } |
578 | ||
a4447b93 RH |
579 | \f |
580 | /* Parse CFI assembler directives. */ | |
54cfded0 | 581 | |
a4447b93 | 582 | static void dot_cfi (int); |
cdfbf930 | 583 | static void dot_cfi_escape (int); |
38462edf | 584 | static void dot_cfi_sections (int); |
a4447b93 RH |
585 | static void dot_cfi_startproc (int); |
586 | static void dot_cfi_endproc (int); | |
9b8ae42e JJ |
587 | static void dot_cfi_personality (int); |
588 | static void dot_cfi_lsda (int); | |
f1c4cc75 | 589 | static void dot_cfi_val_encoded_addr (int); |
54cfded0 | 590 | |
a4447b93 | 591 | /* Fake CFI type; outside the byte range of any real CFI insn. */ |
2be24b54 ML |
592 | #define CFI_adjust_cfa_offset 0x100 |
593 | #define CFI_return_column 0x101 | |
fa87b337 | 594 | #define CFI_rel_offset 0x102 |
cdfbf930 | 595 | #define CFI_escape 0x103 |
63752a75 | 596 | #define CFI_signal_frame 0x104 |
f1c4cc75 | 597 | #define CFI_val_encoded_addr 0x105 |
54cfded0 | 598 | |
a4447b93 RH |
599 | const pseudo_typeS cfi_pseudo_table[] = |
600 | { | |
38462edf | 601 | { "cfi_sections", dot_cfi_sections, 0 }, |
a4447b93 RH |
602 | { "cfi_startproc", dot_cfi_startproc, 0 }, |
603 | { "cfi_endproc", dot_cfi_endproc, 0 }, | |
604 | { "cfi_def_cfa", dot_cfi, DW_CFA_def_cfa }, | |
605 | { "cfi_def_cfa_register", dot_cfi, DW_CFA_def_cfa_register }, | |
606 | { "cfi_def_cfa_offset", dot_cfi, DW_CFA_def_cfa_offset }, | |
607 | { "cfi_adjust_cfa_offset", dot_cfi, CFI_adjust_cfa_offset }, | |
608 | { "cfi_offset", dot_cfi, DW_CFA_offset }, | |
fa87b337 | 609 | { "cfi_rel_offset", dot_cfi, CFI_rel_offset }, |
a4447b93 | 610 | { "cfi_register", dot_cfi, DW_CFA_register }, |
2be24b54 ML |
611 | { "cfi_return_column", dot_cfi, CFI_return_column }, |
612 | { "cfi_restore", dot_cfi, DW_CFA_restore }, | |
613 | { "cfi_undefined", dot_cfi, DW_CFA_undefined }, | |
614 | { "cfi_same_value", dot_cfi, DW_CFA_same_value }, | |
615 | { "cfi_remember_state", dot_cfi, DW_CFA_remember_state }, | |
616 | { "cfi_restore_state", dot_cfi, DW_CFA_restore_state }, | |
6749011b | 617 | { "cfi_window_save", dot_cfi, DW_CFA_GNU_window_save }, |
cdfbf930 | 618 | { "cfi_escape", dot_cfi_escape, 0 }, |
63752a75 | 619 | { "cfi_signal_frame", dot_cfi, CFI_signal_frame }, |
9b8ae42e JJ |
620 | { "cfi_personality", dot_cfi_personality, 0 }, |
621 | { "cfi_lsda", dot_cfi_lsda, 0 }, | |
f1c4cc75 | 622 | { "cfi_val_encoded_addr", dot_cfi_val_encoded_addr, 0 }, |
a4447b93 RH |
623 | { NULL, NULL, 0 } |
624 | }; | |
54cfded0 AM |
625 | |
626 | static void | |
a4447b93 | 627 | cfi_parse_separator (void) |
54cfded0 | 628 | { |
a4447b93 RH |
629 | SKIP_WHITESPACE (); |
630 | if (*input_line_pointer == ',') | |
631 | input_line_pointer++; | |
632 | else | |
633 | as_bad (_("missing separator")); | |
54cfded0 AM |
634 | } |
635 | ||
a60de03c JB |
636 | #ifndef tc_parse_to_dw2regnum |
637 | static void | |
72b016b4 | 638 | tc_parse_to_dw2regnum (expressionS *exp) |
54cfded0 | 639 | { |
a60de03c | 640 | # ifdef tc_regname_to_dw2regnum |
a4447b93 RH |
641 | SKIP_WHITESPACE (); |
642 | if (is_name_beginner (*input_line_pointer) | |
643 | || (*input_line_pointer == '%' | |
644 | && is_name_beginner (*++input_line_pointer))) | |
645 | { | |
646 | char *name, c; | |
647 | ||
648 | name = input_line_pointer; | |
649 | c = get_symbol_end (); | |
650 | ||
a60de03c JB |
651 | exp->X_op = O_constant; |
652 | exp->X_add_number = tc_regname_to_dw2regnum (name); | |
54cfded0 | 653 | |
a4447b93 | 654 | *input_line_pointer = c; |
a4447b93 | 655 | } |
a60de03c JB |
656 | else |
657 | # endif | |
658 | expression_and_evaluate (exp); | |
659 | } | |
a4447b93 RH |
660 | #endif |
661 | ||
a60de03c JB |
662 | static unsigned |
663 | cfi_parse_reg (void) | |
664 | { | |
665 | int regno; | |
666 | expressionS exp; | |
667 | ||
668 | tc_parse_to_dw2regnum (&exp); | |
a4447b93 | 669 | switch (exp.X_op) |
54cfded0 | 670 | { |
a4447b93 RH |
671 | case O_register: |
672 | case O_constant: | |
673 | regno = exp.X_add_number; | |
674 | break; | |
675 | ||
676 | default: | |
a60de03c JB |
677 | regno = -1; |
678 | break; | |
679 | } | |
680 | ||
681 | if (regno < 0) | |
682 | { | |
a4447b93 RH |
683 | as_bad (_("bad register expression")); |
684 | regno = 0; | |
54cfded0 AM |
685 | } |
686 | ||
a4447b93 RH |
687 | return regno; |
688 | } | |
689 | ||
690 | static offsetT | |
691 | cfi_parse_const (void) | |
692 | { | |
693 | return get_absolute_expression (); | |
54cfded0 AM |
694 | } |
695 | ||
696 | static void | |
a4447b93 | 697 | dot_cfi (int arg) |
54cfded0 | 698 | { |
a4447b93 RH |
699 | offsetT offset; |
700 | unsigned reg1, reg2; | |
54cfded0 | 701 | |
ae424f82 | 702 | if (frchain_now->frch_cfi_data == NULL) |
54cfded0 AM |
703 | { |
704 | as_bad (_("CFI instruction used without previous .cfi_startproc")); | |
7c9c8381 | 705 | ignore_rest_of_line (); |
54cfded0 AM |
706 | return; |
707 | } | |
708 | ||
a4447b93 | 709 | /* If the last address was not at the current PC, advance to current. */ |
ae424f82 JJ |
710 | if (symbol_get_frag (frchain_now->frch_cfi_data->last_address) != frag_now |
711 | || S_GET_VALUE (frchain_now->frch_cfi_data->last_address) | |
712 | != frag_now_fix ()) | |
a4447b93 | 713 | cfi_add_advance_loc (symbol_temp_new_now ()); |
54cfded0 AM |
714 | |
715 | switch (arg) | |
716 | { | |
a4447b93 | 717 | case DW_CFA_offset: |
a4447b93 RH |
718 | reg1 = cfi_parse_reg (); |
719 | cfi_parse_separator (); | |
720 | offset = cfi_parse_const (); | |
2be24b54 ML |
721 | cfi_add_CFA_offset (reg1, offset); |
722 | break; | |
a4447b93 | 723 | |
fa87b337 RH |
724 | case CFI_rel_offset: |
725 | reg1 = cfi_parse_reg (); | |
726 | cfi_parse_separator (); | |
727 | offset = cfi_parse_const (); | |
ae424f82 JJ |
728 | cfi_add_CFA_offset (reg1, |
729 | offset - frchain_now->frch_cfi_data->cur_cfa_offset); | |
fa87b337 RH |
730 | break; |
731 | ||
2be24b54 ML |
732 | case DW_CFA_def_cfa: |
733 | reg1 = cfi_parse_reg (); | |
734 | cfi_parse_separator (); | |
735 | offset = cfi_parse_const (); | |
736 | cfi_add_CFA_def_cfa (reg1, offset); | |
54cfded0 AM |
737 | break; |
738 | ||
a4447b93 RH |
739 | case DW_CFA_register: |
740 | reg1 = cfi_parse_reg (); | |
741 | cfi_parse_separator (); | |
742 | reg2 = cfi_parse_reg (); | |
a4447b93 | 743 | cfi_add_CFA_register (reg1, reg2); |
39b82151 ML |
744 | break; |
745 | ||
a4447b93 RH |
746 | case DW_CFA_def_cfa_register: |
747 | reg1 = cfi_parse_reg (); | |
748 | cfi_add_CFA_def_cfa_register (reg1); | |
54cfded0 AM |
749 | break; |
750 | ||
a4447b93 RH |
751 | case DW_CFA_def_cfa_offset: |
752 | offset = cfi_parse_const (); | |
753 | cfi_add_CFA_def_cfa_offset (offset); | |
54cfded0 AM |
754 | break; |
755 | ||
54cfded0 | 756 | case CFI_adjust_cfa_offset: |
a4447b93 | 757 | offset = cfi_parse_const (); |
ae424f82 JJ |
758 | cfi_add_CFA_def_cfa_offset (frchain_now->frch_cfi_data->cur_cfa_offset |
759 | + offset); | |
54cfded0 AM |
760 | break; |
761 | ||
2be24b54 | 762 | case DW_CFA_restore: |
b57d375b JB |
763 | for (;;) |
764 | { | |
765 | reg1 = cfi_parse_reg (); | |
766 | cfi_add_CFA_restore (reg1); | |
767 | SKIP_WHITESPACE (); | |
768 | if (*input_line_pointer != ',') | |
769 | break; | |
770 | ++input_line_pointer; | |
771 | } | |
2be24b54 ML |
772 | break; |
773 | ||
774 | case DW_CFA_undefined: | |
b57d375b JB |
775 | for (;;) |
776 | { | |
777 | reg1 = cfi_parse_reg (); | |
778 | cfi_add_CFA_undefined (reg1); | |
779 | SKIP_WHITESPACE (); | |
780 | if (*input_line_pointer != ',') | |
781 | break; | |
782 | ++input_line_pointer; | |
783 | } | |
2be24b54 ML |
784 | break; |
785 | ||
786 | case DW_CFA_same_value: | |
787 | reg1 = cfi_parse_reg (); | |
788 | cfi_add_CFA_same_value (reg1); | |
789 | break; | |
790 | ||
791 | case CFI_return_column: | |
792 | reg1 = cfi_parse_reg (); | |
793 | cfi_set_return_column (reg1); | |
794 | break; | |
795 | ||
796 | case DW_CFA_remember_state: | |
797 | cfi_add_CFA_remember_state (); | |
798 | break; | |
799 | ||
800 | case DW_CFA_restore_state: | |
801 | cfi_add_CFA_restore_state (); | |
802 | break; | |
803 | ||
364b6d8b JJ |
804 | case DW_CFA_GNU_window_save: |
805 | cfi_add_CFA_insn (DW_CFA_GNU_window_save); | |
806 | break; | |
807 | ||
63752a75 | 808 | case CFI_signal_frame: |
ae424f82 | 809 | frchain_now->frch_cfi_data->cur_fde_data->signal_frame = 1; |
63752a75 JJ |
810 | break; |
811 | ||
54cfded0 | 812 | default: |
a4447b93 | 813 | abort (); |
54cfded0 | 814 | } |
54cfded0 | 815 | |
a4447b93 | 816 | demand_empty_rest_of_line (); |
54cfded0 AM |
817 | } |
818 | ||
cdfbf930 RH |
819 | static void |
820 | dot_cfi_escape (int ignored ATTRIBUTE_UNUSED) | |
821 | { | |
822 | struct cfi_escape_data *head, **tail, *e; | |
823 | struct cfi_insn_data *insn; | |
824 | ||
ae424f82 | 825 | if (frchain_now->frch_cfi_data == NULL) |
cdfbf930 RH |
826 | { |
827 | as_bad (_("CFI instruction used without previous .cfi_startproc")); | |
7c9c8381 | 828 | ignore_rest_of_line (); |
cdfbf930 RH |
829 | return; |
830 | } | |
831 | ||
832 | /* If the last address was not at the current PC, advance to current. */ | |
ae424f82 JJ |
833 | if (symbol_get_frag (frchain_now->frch_cfi_data->last_address) != frag_now |
834 | || S_GET_VALUE (frchain_now->frch_cfi_data->last_address) | |
835 | != frag_now_fix ()) | |
cdfbf930 RH |
836 | cfi_add_advance_loc (symbol_temp_new_now ()); |
837 | ||
838 | tail = &head; | |
839 | do | |
840 | { | |
1e9cc1c2 | 841 | e = (struct cfi_escape_data *) xmalloc (sizeof (*e)); |
cdfbf930 RH |
842 | do_parse_cons_expression (&e->exp, 1); |
843 | *tail = e; | |
844 | tail = &e->next; | |
845 | } | |
846 | while (*input_line_pointer++ == ','); | |
847 | *tail = NULL; | |
848 | ||
849 | insn = alloc_cfi_insn_data (); | |
850 | insn->insn = CFI_escape; | |
851 | insn->u.esc = head; | |
7c9c8381 JB |
852 | |
853 | --input_line_pointer; | |
854 | demand_empty_rest_of_line (); | |
cdfbf930 RH |
855 | } |
856 | ||
9b8ae42e JJ |
857 | static void |
858 | dot_cfi_personality (int ignored ATTRIBUTE_UNUSED) | |
859 | { | |
860 | struct fde_entry *fde; | |
861 | offsetT encoding; | |
862 | ||
863 | if (frchain_now->frch_cfi_data == NULL) | |
864 | { | |
865 | as_bad (_("CFI instruction used without previous .cfi_startproc")); | |
866 | ignore_rest_of_line (); | |
867 | return; | |
868 | } | |
869 | ||
870 | fde = frchain_now->frch_cfi_data->cur_fde_data; | |
f1c4cc75 | 871 | encoding = cfi_parse_const (); |
9b8ae42e JJ |
872 | if (encoding == DW_EH_PE_omit) |
873 | { | |
874 | demand_empty_rest_of_line (); | |
875 | fde->per_encoding = encoding; | |
876 | return; | |
877 | } | |
878 | ||
879 | if ((encoding & 0xff) != encoding | |
880 | || ((encoding & 0x70) != 0 | |
3dd24306 | 881 | #if CFI_DIFF_EXPR_OK || defined tc_cfi_emit_pcrel_expr |
9b8ae42e JJ |
882 | && (encoding & 0x70) != DW_EH_PE_pcrel |
883 | #endif | |
884 | ) | |
885 | /* leb128 can be handled, but does something actually need it? */ | |
886 | || (encoding & 7) == DW_EH_PE_uleb128 | |
887 | || (encoding & 7) > DW_EH_PE_udata8) | |
888 | { | |
889 | as_bad (_("invalid or unsupported encoding in .cfi_personality")); | |
890 | ignore_rest_of_line (); | |
891 | return; | |
892 | } | |
893 | ||
894 | if (*input_line_pointer++ != ',') | |
895 | { | |
896 | as_bad (_(".cfi_personality requires encoding and symbol arguments")); | |
897 | ignore_rest_of_line (); | |
898 | return; | |
899 | } | |
900 | ||
901 | expression_and_evaluate (&fde->personality); | |
902 | switch (fde->personality.X_op) | |
903 | { | |
904 | case O_symbol: | |
905 | break; | |
906 | case O_constant: | |
907 | if ((encoding & 0x70) == DW_EH_PE_pcrel) | |
908 | encoding = DW_EH_PE_omit; | |
909 | break; | |
910 | default: | |
911 | encoding = DW_EH_PE_omit; | |
912 | break; | |
913 | } | |
914 | ||
915 | fde->per_encoding = encoding; | |
916 | ||
917 | if (encoding == DW_EH_PE_omit) | |
918 | { | |
919 | as_bad (_("wrong second argument to .cfi_personality")); | |
920 | ignore_rest_of_line (); | |
921 | return; | |
922 | } | |
923 | ||
924 | demand_empty_rest_of_line (); | |
925 | } | |
926 | ||
927 | static void | |
928 | dot_cfi_lsda (int ignored ATTRIBUTE_UNUSED) | |
929 | { | |
930 | struct fde_entry *fde; | |
931 | offsetT encoding; | |
932 | ||
933 | if (frchain_now->frch_cfi_data == NULL) | |
934 | { | |
935 | as_bad (_("CFI instruction used without previous .cfi_startproc")); | |
936 | ignore_rest_of_line (); | |
937 | return; | |
938 | } | |
939 | ||
940 | fde = frchain_now->frch_cfi_data->cur_fde_data; | |
f1c4cc75 | 941 | encoding = cfi_parse_const (); |
9b8ae42e JJ |
942 | if (encoding == DW_EH_PE_omit) |
943 | { | |
944 | demand_empty_rest_of_line (); | |
945 | fde->lsda_encoding = encoding; | |
946 | return; | |
947 | } | |
948 | ||
949 | if ((encoding & 0xff) != encoding | |
950 | || ((encoding & 0x70) != 0 | |
2c678708 | 951 | #if CFI_DIFF_LSDA_OK || defined tc_cfi_emit_pcrel_expr |
9b8ae42e JJ |
952 | && (encoding & 0x70) != DW_EH_PE_pcrel |
953 | #endif | |
954 | ) | |
955 | /* leb128 can be handled, but does something actually need it? */ | |
956 | || (encoding & 7) == DW_EH_PE_uleb128 | |
957 | || (encoding & 7) > DW_EH_PE_udata8) | |
958 | { | |
959 | as_bad (_("invalid or unsupported encoding in .cfi_lsda")); | |
960 | ignore_rest_of_line (); | |
961 | return; | |
962 | } | |
963 | ||
964 | if (*input_line_pointer++ != ',') | |
965 | { | |
966 | as_bad (_(".cfi_lsda requires encoding and symbol arguments")); | |
967 | ignore_rest_of_line (); | |
968 | return; | |
969 | } | |
970 | ||
971 | fde->lsda_encoding = encoding; | |
972 | ||
973 | expression_and_evaluate (&fde->lsda); | |
974 | switch (fde->lsda.X_op) | |
975 | { | |
976 | case O_symbol: | |
977 | break; | |
978 | case O_constant: | |
979 | if ((encoding & 0x70) == DW_EH_PE_pcrel) | |
980 | encoding = DW_EH_PE_omit; | |
981 | break; | |
982 | default: | |
983 | encoding = DW_EH_PE_omit; | |
984 | break; | |
985 | } | |
986 | ||
987 | fde->lsda_encoding = encoding; | |
988 | ||
989 | if (encoding == DW_EH_PE_omit) | |
990 | { | |
991 | as_bad (_("wrong second argument to .cfi_lsda")); | |
992 | ignore_rest_of_line (); | |
993 | return; | |
994 | } | |
995 | ||
996 | demand_empty_rest_of_line (); | |
997 | } | |
998 | ||
f1c4cc75 RH |
999 | static void |
1000 | dot_cfi_val_encoded_addr (int ignored ATTRIBUTE_UNUSED) | |
1001 | { | |
1002 | struct cfi_insn_data *insn_ptr; | |
1003 | offsetT encoding; | |
1004 | ||
1005 | if (frchain_now->frch_cfi_data == NULL) | |
1006 | { | |
1007 | as_bad (_("CFI instruction used without previous .cfi_startproc")); | |
1008 | ignore_rest_of_line (); | |
1009 | return; | |
1010 | } | |
1011 | ||
1012 | /* If the last address was not at the current PC, advance to current. */ | |
1013 | if (symbol_get_frag (frchain_now->frch_cfi_data->last_address) != frag_now | |
1014 | || S_GET_VALUE (frchain_now->frch_cfi_data->last_address) | |
1015 | != frag_now_fix ()) | |
1016 | cfi_add_advance_loc (symbol_temp_new_now ()); | |
1017 | ||
1018 | insn_ptr = alloc_cfi_insn_data (); | |
1019 | insn_ptr->insn = CFI_val_encoded_addr; | |
72b016b4 | 1020 | |
f1c4cc75 RH |
1021 | insn_ptr->u.ea.reg = cfi_parse_reg (); |
1022 | ||
1023 | cfi_parse_separator (); | |
1024 | encoding = cfi_parse_const (); | |
1025 | if ((encoding & 0xff) != encoding | |
1026 | || ((encoding & 0x70) != 0 | |
1027 | #if CFI_DIFF_EXPR_OK || defined tc_cfi_emit_pcrel_expr | |
1028 | && (encoding & 0x70) != DW_EH_PE_pcrel | |
1029 | #endif | |
1030 | ) | |
1031 | /* leb128 can be handled, but does something actually need it? */ | |
1032 | || (encoding & 7) == DW_EH_PE_uleb128 | |
1033 | || (encoding & 7) > DW_EH_PE_udata8) | |
1034 | { | |
1035 | as_bad (_("invalid or unsupported encoding in .cfi_lsda")); | |
1036 | encoding = DW_EH_PE_omit; | |
1037 | } | |
1038 | ||
1039 | cfi_parse_separator (); | |
1040 | expression_and_evaluate (&insn_ptr->u.ea.exp); | |
1041 | switch (insn_ptr->u.ea.exp.X_op) | |
1042 | { | |
1043 | case O_symbol: | |
1044 | break; | |
1045 | case O_constant: | |
1046 | if ((encoding & 0x70) != DW_EH_PE_pcrel) | |
1047 | break; | |
1048 | default: | |
1049 | encoding = DW_EH_PE_omit; | |
1050 | break; | |
1051 | } | |
1052 | ||
1053 | insn_ptr->u.ea.encoding = encoding; | |
1054 | if (encoding == DW_EH_PE_omit) | |
1055 | { | |
1056 | as_bad (_("wrong third argument to .cfi_val_encoded_addr")); | |
1057 | ignore_rest_of_line (); | |
1058 | return; | |
1059 | } | |
1060 | ||
1061 | demand_empty_rest_of_line (); | |
1062 | } | |
1063 | ||
38462edf JJ |
1064 | /* By default emit .eh_frame only, not .debug_frame. */ |
1065 | #define CFI_EMIT_eh_frame (1 << 0) | |
1066 | #define CFI_EMIT_debug_frame (1 << 1) | |
1067 | static int cfi_sections = CFI_EMIT_eh_frame; | |
1068 | ||
1069 | static void | |
1070 | dot_cfi_sections (int ignored ATTRIBUTE_UNUSED) | |
1071 | { | |
1072 | int sections = 0; | |
1073 | ||
1074 | SKIP_WHITESPACE (); | |
1075 | if (is_name_beginner (*input_line_pointer)) | |
1076 | while (1) | |
1077 | { | |
1078 | char *name, c; | |
1079 | ||
1080 | name = input_line_pointer; | |
1081 | c = get_symbol_end (); | |
1082 | ||
72b016b4 NC |
1083 | if (strncmp (name, ".eh_frame", sizeof ".eh_frame") == 0 |
1084 | && name[9] != '_') | |
38462edf | 1085 | sections |= CFI_EMIT_eh_frame; |
72b016b4 | 1086 | else if (strncmp (name, ".debug_frame", sizeof ".debug_frame") == 0) |
38462edf JJ |
1087 | sections |= CFI_EMIT_debug_frame; |
1088 | else | |
1089 | { | |
1090 | *input_line_pointer = c; | |
1091 | input_line_pointer = name; | |
1092 | break; | |
1093 | } | |
1094 | ||
1095 | *input_line_pointer = c; | |
1096 | SKIP_WHITESPACE (); | |
1097 | if (*input_line_pointer == ',') | |
1098 | { | |
1099 | name = input_line_pointer++; | |
1100 | SKIP_WHITESPACE (); | |
1101 | if (!is_name_beginner (*input_line_pointer)) | |
1102 | { | |
1103 | input_line_pointer = name; | |
1104 | break; | |
1105 | } | |
1106 | } | |
1107 | else if (is_name_beginner (*input_line_pointer)) | |
1108 | break; | |
1109 | } | |
1110 | ||
1111 | demand_empty_rest_of_line (); | |
1112 | cfi_sections = sections; | |
1113 | } | |
1114 | ||
54cfded0 | 1115 | static void |
a4447b93 | 1116 | dot_cfi_startproc (int ignored ATTRIBUTE_UNUSED) |
54cfded0 | 1117 | { |
a4447b93 | 1118 | int simple = 0; |
39b82151 | 1119 | |
ae424f82 | 1120 | if (frchain_now->frch_cfi_data != NULL) |
54cfded0 AM |
1121 | { |
1122 | as_bad (_("previous CFI entry not closed (missing .cfi_endproc)")); | |
7c9c8381 | 1123 | ignore_rest_of_line (); |
54cfded0 AM |
1124 | return; |
1125 | } | |
1126 | ||
a4447b93 | 1127 | cfi_new_fde (symbol_temp_new_now ()); |
39b82151 | 1128 | |
a4447b93 RH |
1129 | SKIP_WHITESPACE (); |
1130 | if (is_name_beginner (*input_line_pointer)) | |
1131 | { | |
1132 | char *name, c; | |
54cfded0 | 1133 | |
a4447b93 RH |
1134 | name = input_line_pointer; |
1135 | c = get_symbol_end (); | |
54cfded0 | 1136 | |
a4447b93 RH |
1137 | if (strcmp (name, "simple") == 0) |
1138 | { | |
1139 | simple = 1; | |
1140 | *input_line_pointer = c; | |
1141 | } | |
1142 | else | |
1143 | input_line_pointer = name; | |
1144 | } | |
1145 | demand_empty_rest_of_line (); | |
1146 | ||
ae424f82 | 1147 | frchain_now->frch_cfi_data->cur_cfa_offset = 0; |
a4447b93 | 1148 | if (!simple) |
39b82151 | 1149 | tc_cfi_frame_initial_instructions (); |
54cfded0 AM |
1150 | } |
1151 | ||
a4447b93 RH |
1152 | static void |
1153 | dot_cfi_endproc (int ignored ATTRIBUTE_UNUSED) | |
1154 | { | |
ae424f82 | 1155 | if (frchain_now->frch_cfi_data == NULL) |
a4447b93 RH |
1156 | { |
1157 | as_bad (_(".cfi_endproc without corresponding .cfi_startproc")); | |
7c9c8381 | 1158 | ignore_rest_of_line (); |
a4447b93 RH |
1159 | return; |
1160 | } | |
54cfded0 | 1161 | |
a4447b93 | 1162 | cfi_end_fde (symbol_temp_new_now ()); |
7c9c8381 JB |
1163 | |
1164 | demand_empty_rest_of_line (); | |
a4447b93 | 1165 | } |
39b82151 | 1166 | |
a4447b93 RH |
1167 | \f |
1168 | /* Emit a single byte into the current segment. */ | |
54cfded0 | 1169 | |
a4447b93 RH |
1170 | static inline void |
1171 | out_one (int byte) | |
54cfded0 | 1172 | { |
a4447b93 RH |
1173 | FRAG_APPEND_1_CHAR (byte); |
1174 | } | |
54cfded0 | 1175 | |
a4447b93 | 1176 | /* Emit a two-byte word into the current segment. */ |
54cfded0 | 1177 | |
a4447b93 RH |
1178 | static inline void |
1179 | out_two (int data) | |
1180 | { | |
1181 | md_number_to_chars (frag_more (2), data, 2); | |
1182 | } | |
54cfded0 | 1183 | |
a4447b93 | 1184 | /* Emit a four byte word into the current segment. */ |
54cfded0 | 1185 | |
a4447b93 RH |
1186 | static inline void |
1187 | out_four (int data) | |
1188 | { | |
1189 | md_number_to_chars (frag_more (4), data, 4); | |
1190 | } | |
1191 | ||
1192 | /* Emit an unsigned "little-endian base 128" number. */ | |
54cfded0 | 1193 | |
a4447b93 RH |
1194 | static void |
1195 | out_uleb128 (addressT value) | |
1196 | { | |
1197 | output_leb128 (frag_more (sizeof_leb128 (value, 0)), value, 0); | |
54cfded0 AM |
1198 | } |
1199 | ||
a4447b93 RH |
1200 | /* Emit an unsigned "little-endian base 128" number. */ |
1201 | ||
1202 | static void | |
1203 | out_sleb128 (offsetT value) | |
54cfded0 | 1204 | { |
a4447b93 RH |
1205 | output_leb128 (frag_more (sizeof_leb128 (value, 1)), value, 1); |
1206 | } | |
54cfded0 | 1207 | |
a4447b93 RH |
1208 | static void |
1209 | output_cfi_insn (struct cfi_insn_data *insn) | |
1210 | { | |
1211 | offsetT offset; | |
1212 | unsigned int regno; | |
54cfded0 | 1213 | |
a4447b93 | 1214 | switch (insn->insn) |
54cfded0 | 1215 | { |
a4447b93 RH |
1216 | case DW_CFA_advance_loc: |
1217 | { | |
1218 | symbolS *from = insn->u.ll.lab1; | |
1219 | symbolS *to = insn->u.ll.lab2; | |
1220 | ||
1221 | if (symbol_get_frag (to) == symbol_get_frag (from)) | |
1222 | { | |
1223 | addressT delta = S_GET_VALUE (to) - S_GET_VALUE (from); | |
1224 | addressT scaled = delta / DWARF2_LINE_MIN_INSN_LENGTH; | |
1225 | ||
1226 | if (scaled <= 0x3F) | |
1227 | out_one (DW_CFA_advance_loc + scaled); | |
395e8345 | 1228 | else if (scaled <= 0xFF) |
a4447b93 | 1229 | { |
9b8ae42e | 1230 | out_one (DW_CFA_advance_loc1); |
395e8345 | 1231 | out_one (scaled); |
a4447b93 | 1232 | } |
395e8345 | 1233 | else if (scaled <= 0xFFFF) |
a4447b93 | 1234 | { |
9b8ae42e | 1235 | out_one (DW_CFA_advance_loc2); |
395e8345 | 1236 | out_two (scaled); |
a4447b93 RH |
1237 | } |
1238 | else | |
1239 | { | |
9b8ae42e | 1240 | out_one (DW_CFA_advance_loc4); |
395e8345 | 1241 | out_four (scaled); |
a4447b93 RH |
1242 | } |
1243 | } | |
1244 | else | |
1245 | { | |
1246 | expressionS exp; | |
1247 | ||
1248 | exp.X_op = O_subtract; | |
1249 | exp.X_add_symbol = to; | |
1250 | exp.X_op_symbol = from; | |
1251 | exp.X_add_number = 0; | |
1252 | ||
1253 | /* The code in ehopt.c expects that one byte of the encoding | |
1254 | is already allocated to the frag. This comes from the way | |
1255 | that it scans the .eh_frame section looking first for the | |
1256 | .byte DW_CFA_advance_loc4. */ | |
1fbfe785 | 1257 | *frag_more (1) = DW_CFA_advance_loc4; |
a4447b93 RH |
1258 | |
1259 | frag_var (rs_cfa, 4, 0, DWARF2_LINE_MIN_INSN_LENGTH << 3, | |
1260 | make_expr_symbol (&exp), frag_now_fix () - 1, | |
1261 | (char *) frag_now); | |
1262 | } | |
1263 | } | |
1264 | break; | |
1265 | ||
1266 | case DW_CFA_def_cfa: | |
1267 | offset = insn->u.ri.offset; | |
1268 | if (offset < 0) | |
54cfded0 | 1269 | { |
a4447b93 RH |
1270 | out_one (DW_CFA_def_cfa_sf); |
1271 | out_uleb128 (insn->u.ri.reg); | |
dcb45a06 | 1272 | out_sleb128 (offset / DWARF2_CIE_DATA_ALIGNMENT); |
54cfded0 AM |
1273 | } |
1274 | else | |
1275 | { | |
a4447b93 RH |
1276 | out_one (DW_CFA_def_cfa); |
1277 | out_uleb128 (insn->u.ri.reg); | |
1278 | out_uleb128 (offset); | |
54cfded0 AM |
1279 | } |
1280 | break; | |
1281 | ||
a4447b93 | 1282 | case DW_CFA_def_cfa_register: |
2be24b54 ML |
1283 | case DW_CFA_undefined: |
1284 | case DW_CFA_same_value: | |
1285 | out_one (insn->insn); | |
1286 | out_uleb128 (insn->u.r); | |
54cfded0 AM |
1287 | break; |
1288 | ||
a4447b93 RH |
1289 | case DW_CFA_def_cfa_offset: |
1290 | offset = insn->u.i; | |
1291 | if (offset < 0) | |
1292 | { | |
1293 | out_one (DW_CFA_def_cfa_offset_sf); | |
dcb45a06 | 1294 | out_sleb128 (offset / DWARF2_CIE_DATA_ALIGNMENT); |
a4447b93 RH |
1295 | } |
1296 | else | |
1297 | { | |
1298 | out_one (DW_CFA_def_cfa_offset); | |
1299 | out_uleb128 (offset); | |
1300 | } | |
54cfded0 AM |
1301 | break; |
1302 | ||
2be24b54 ML |
1303 | case DW_CFA_restore: |
1304 | regno = insn->u.r; | |
1305 | if (regno <= 0x3F) | |
1306 | { | |
1307 | out_one (DW_CFA_restore + regno); | |
1308 | } | |
1309 | else | |
1310 | { | |
1311 | out_one (DW_CFA_restore_extended); | |
1312 | out_uleb128 (regno); | |
1313 | } | |
1314 | break; | |
1315 | ||
a4447b93 RH |
1316 | case DW_CFA_offset: |
1317 | regno = insn->u.ri.reg; | |
1318 | offset = insn->u.ri.offset / DWARF2_CIE_DATA_ALIGNMENT; | |
1319 | if (offset < 0) | |
1320 | { | |
1233ae62 | 1321 | out_one (DW_CFA_offset_extended_sf); |
a4447b93 RH |
1322 | out_uleb128 (regno); |
1323 | out_sleb128 (offset); | |
1324 | } | |
1325 | else if (regno <= 0x3F) | |
1326 | { | |
1327 | out_one (DW_CFA_offset + regno); | |
1328 | out_uleb128 (offset); | |
1329 | } | |
54cfded0 AM |
1330 | else |
1331 | { | |
a4447b93 RH |
1332 | out_one (DW_CFA_offset_extended); |
1333 | out_uleb128 (regno); | |
1334 | out_uleb128 (offset); | |
54cfded0 | 1335 | } |
54cfded0 AM |
1336 | break; |
1337 | ||
a4447b93 RH |
1338 | case DW_CFA_register: |
1339 | out_one (DW_CFA_register); | |
1340 | out_uleb128 (insn->u.rr.reg1); | |
1341 | out_uleb128 (insn->u.rr.reg2); | |
39b82151 ML |
1342 | break; |
1343 | ||
2be24b54 ML |
1344 | case DW_CFA_remember_state: |
1345 | case DW_CFA_restore_state: | |
2be24b54 | 1346 | out_one (insn->insn); |
54cfded0 AM |
1347 | break; |
1348 | ||
364b6d8b JJ |
1349 | case DW_CFA_GNU_window_save: |
1350 | out_one (DW_CFA_GNU_window_save); | |
1351 | break; | |
1352 | ||
cdfbf930 RH |
1353 | case CFI_escape: |
1354 | { | |
1355 | struct cfi_escape_data *e; | |
1356 | for (e = insn->u.esc; e ; e = e->next) | |
1357 | emit_expr (&e->exp, 1); | |
1358 | break; | |
1359 | } | |
1360 | ||
f1c4cc75 RH |
1361 | case CFI_val_encoded_addr: |
1362 | { | |
1363 | unsigned encoding = insn->u.ea.encoding; | |
1364 | offsetT encoding_size; | |
1365 | ||
1366 | if (encoding == DW_EH_PE_omit) | |
1367 | break; | |
1368 | out_one (DW_CFA_val_expression); | |
1369 | out_uleb128 (insn->u.ea.reg); | |
1370 | ||
1371 | switch (encoding & 0x7) | |
1372 | { | |
1373 | case DW_EH_PE_absptr: | |
1374 | encoding_size = DWARF2_ADDR_SIZE (stdoutput); | |
1375 | break; | |
1376 | case DW_EH_PE_udata2: | |
1377 | encoding_size = 2; | |
1378 | break; | |
1379 | case DW_EH_PE_udata4: | |
1380 | encoding_size = 4; | |
1381 | break; | |
1382 | case DW_EH_PE_udata8: | |
1383 | encoding_size = 8; | |
1384 | break; | |
1385 | default: | |
1386 | abort (); | |
1387 | } | |
1388 | ||
1389 | /* If the user has requested absolute encoding, | |
1390 | then use the smaller DW_OP_addr encoding. */ | |
1391 | if (insn->u.ea.encoding == DW_EH_PE_absptr) | |
1392 | { | |
1393 | out_uleb128 (1 + encoding_size); | |
1394 | out_one (DW_OP_addr); | |
1395 | } | |
1396 | else | |
1397 | { | |
1398 | out_uleb128 (1 + 1 + encoding_size); | |
1399 | out_one (DW_OP_GNU_encoded_addr); | |
1400 | out_one (encoding); | |
1401 | ||
1402 | if ((encoding & 0x70) == DW_EH_PE_pcrel) | |
1403 | { | |
1404 | #if CFI_DIFF_EXPR_OK | |
1405 | insn->u.ea.exp.X_op = O_subtract; | |
1406 | insn->u.ea.exp.X_op_symbol = symbol_temp_new_now (); | |
1407 | #elif defined (tc_cfi_emit_pcrel_expr) | |
c0cf08ad | 1408 | tc_cfi_emit_pcrel_expr (&insn->u.ea.exp, encoding_size); |
f1c4cc75 RH |
1409 | break; |
1410 | #else | |
1411 | abort (); | |
1412 | #endif | |
1413 | } | |
1414 | } | |
1415 | emit_expr (&insn->u.ea.exp, encoding_size); | |
1416 | } | |
1417 | break; | |
72b016b4 | 1418 | |
54cfded0 | 1419 | default: |
a4447b93 | 1420 | abort (); |
54cfded0 | 1421 | } |
54cfded0 AM |
1422 | } |
1423 | ||
9b8ae42e JJ |
1424 | static offsetT |
1425 | encoding_size (unsigned char encoding) | |
1426 | { | |
1427 | if (encoding == DW_EH_PE_omit) | |
1428 | return 0; | |
1429 | switch (encoding & 0x7) | |
1430 | { | |
1431 | case 0: | |
1432 | return bfd_get_arch_size (stdoutput) == 64 ? 8 : 4; | |
1433 | case DW_EH_PE_udata2: | |
1434 | return 2; | |
1435 | case DW_EH_PE_udata4: | |
1436 | return 4; | |
1437 | case DW_EH_PE_udata8: | |
1438 | return 8; | |
1439 | default: | |
1440 | abort (); | |
1441 | } | |
1442 | } | |
1443 | ||
54cfded0 | 1444 | static void |
38462edf | 1445 | output_cie (struct cie_entry *cie, bfd_boolean eh_frame, int align) |
54cfded0 | 1446 | { |
a4447b93 | 1447 | symbolS *after_size_address, *end_address; |
7c0295b1 | 1448 | expressionS exp; |
a4447b93 | 1449 | struct cfi_insn_data *i; |
9b8ae42e | 1450 | offsetT augmentation_size; |
8c9b70b1 | 1451 | int enc; |
38462edf | 1452 | enum dwarf2_format fmt = DWARF2_FORMAT (now_seg); |
a4447b93 RH |
1453 | |
1454 | cie->start_address = symbol_temp_new_now (); | |
1455 | after_size_address = symbol_temp_make (); | |
1456 | end_address = symbol_temp_make (); | |
1457 | ||
1458 | exp.X_op = O_subtract; | |
1459 | exp.X_add_symbol = end_address; | |
1460 | exp.X_op_symbol = after_size_address; | |
1461 | exp.X_add_number = 0; | |
1462 | ||
38462edf JJ |
1463 | if (eh_frame || fmt == dwarf2_format_32bit) |
1464 | emit_expr (&exp, 4); /* Length. */ | |
1465 | else | |
1466 | { | |
1467 | if (fmt == dwarf2_format_64bit) | |
1468 | out_four (-1); | |
1469 | emit_expr (&exp, 8); /* Length. */ | |
1470 | } | |
a4447b93 | 1471 | symbol_set_value_now (after_size_address); |
38462edf JJ |
1472 | if (eh_frame) |
1473 | out_four (0); /* CIE id. */ | |
1474 | else | |
1475 | { | |
1476 | out_four (-1); /* CIE id. */ | |
1477 | if (fmt != dwarf2_format_32bit) | |
1478 | out_four (-1); | |
1479 | } | |
289040ca | 1480 | out_one (DW_CIE_VERSION); /* Version. */ |
38462edf JJ |
1481 | if (eh_frame) |
1482 | { | |
1483 | out_one ('z'); /* Augmentation. */ | |
1484 | if (cie->per_encoding != DW_EH_PE_omit) | |
1485 | out_one ('P'); | |
1486 | if (cie->lsda_encoding != DW_EH_PE_omit) | |
1487 | out_one ('L'); | |
1488 | out_one ('R'); | |
38462edf | 1489 | } |
d905c788 TS |
1490 | if (cie->signal_frame) |
1491 | out_one ('S'); | |
a4447b93 | 1492 | out_one (0); |
289040ca NC |
1493 | out_uleb128 (DWARF2_LINE_MIN_INSN_LENGTH); /* Code alignment. */ |
1494 | out_sleb128 (DWARF2_CIE_DATA_ALIGNMENT); /* Data alignment. */ | |
0da76f83 NC |
1495 | if (DW_CIE_VERSION == 1) /* Return column. */ |
1496 | out_one (cie->return_column); | |
1497 | else | |
1498 | out_uleb128 (cie->return_column); | |
38462edf JJ |
1499 | if (eh_frame) |
1500 | { | |
1501 | augmentation_size = 1 + (cie->lsda_encoding != DW_EH_PE_omit); | |
1502 | if (cie->per_encoding != DW_EH_PE_omit) | |
1503 | augmentation_size += 1 + encoding_size (cie->per_encoding); | |
1504 | out_uleb128 (augmentation_size); /* Augmentation size. */ | |
4e4e1355 TS |
1505 | |
1506 | if (cie->per_encoding != DW_EH_PE_omit) | |
9b8ae42e | 1507 | { |
4e4e1355 TS |
1508 | offsetT size = encoding_size (cie->per_encoding); |
1509 | out_one (cie->per_encoding); | |
1510 | exp = cie->personality; | |
1511 | if ((cie->per_encoding & 0x70) == DW_EH_PE_pcrel) | |
1512 | { | |
3dd24306 | 1513 | #if CFI_DIFF_EXPR_OK |
4e4e1355 TS |
1514 | exp.X_op = O_subtract; |
1515 | exp.X_op_symbol = symbol_temp_new_now (); | |
1516 | emit_expr (&exp, size); | |
9b8ae42e | 1517 | #elif defined (tc_cfi_emit_pcrel_expr) |
4e4e1355 | 1518 | tc_cfi_emit_pcrel_expr (&exp, size); |
9b8ae42e | 1519 | #else |
4e4e1355 | 1520 | abort (); |
9b8ae42e | 1521 | #endif |
4e4e1355 TS |
1522 | } |
1523 | else | |
1524 | emit_expr (&exp, size); | |
9b8ae42e | 1525 | } |
4e4e1355 TS |
1526 | |
1527 | if (cie->lsda_encoding != DW_EH_PE_omit) | |
1528 | out_one (cie->lsda_encoding); | |
9b8ae42e | 1529 | } |
8c9b70b1 RH |
1530 | |
1531 | switch (DWARF2_FDE_RELOC_SIZE) | |
1532 | { | |
1533 | case 2: | |
1534 | enc = DW_EH_PE_sdata2; | |
1535 | break; | |
1536 | case 4: | |
1537 | enc = DW_EH_PE_sdata4; | |
1538 | break; | |
1539 | case 8: | |
1540 | enc = DW_EH_PE_sdata8; | |
1541 | break; | |
1542 | default: | |
1543 | abort (); | |
1544 | } | |
3dd24306 | 1545 | #if CFI_DIFF_EXPR_OK || defined tc_cfi_emit_pcrel_expr |
8c9b70b1 | 1546 | enc |= DW_EH_PE_pcrel; |
364b6d8b | 1547 | #endif |
38462edf JJ |
1548 | if (eh_frame) |
1549 | out_one (enc); | |
a4447b93 RH |
1550 | |
1551 | if (cie->first) | |
72b016b4 NC |
1552 | { |
1553 | for (i = cie->first; i != cie->last; i = i->next) | |
1554 | { | |
1555 | if (i->cur_seg != cie->cur_seg) | |
1556 | continue; | |
1557 | output_cfi_insn (i); | |
1558 | } | |
1559 | } | |
a4447b93 | 1560 | |
38462edf | 1561 | frag_align (align, DW_CFA_nop, 0); |
a4447b93 RH |
1562 | symbol_set_value_now (end_address); |
1563 | } | |
54cfded0 | 1564 | |
a4447b93 RH |
1565 | static void |
1566 | output_fde (struct fde_entry *fde, struct cie_entry *cie, | |
38462edf JJ |
1567 | bfd_boolean eh_frame, struct cfi_insn_data *first, |
1568 | int align) | |
a4447b93 RH |
1569 | { |
1570 | symbolS *after_size_address, *end_address; | |
1571 | expressionS exp; | |
9b8ae42e | 1572 | offsetT augmentation_size; |
38462edf JJ |
1573 | enum dwarf2_format fmt = DWARF2_FORMAT (now_seg); |
1574 | int offset_size; | |
1575 | int addr_size; | |
54cfded0 | 1576 | |
a4447b93 RH |
1577 | after_size_address = symbol_temp_make (); |
1578 | end_address = symbol_temp_make (); | |
54cfded0 | 1579 | |
a4447b93 RH |
1580 | exp.X_op = O_subtract; |
1581 | exp.X_add_symbol = end_address; | |
1582 | exp.X_op_symbol = after_size_address; | |
1583 | exp.X_add_number = 0; | |
38462edf JJ |
1584 | if (eh_frame || fmt == dwarf2_format_32bit) |
1585 | offset_size = 4; | |
1586 | else | |
1587 | { | |
1588 | if (fmt == dwarf2_format_64bit) | |
1589 | out_four (-1); | |
1590 | offset_size = 8; | |
1591 | } | |
1592 | emit_expr (&exp, offset_size); /* Length. */ | |
a4447b93 | 1593 | symbol_set_value_now (after_size_address); |
54cfded0 | 1594 | |
38462edf JJ |
1595 | if (eh_frame) |
1596 | { | |
3251495b | 1597 | exp.X_op = O_subtract; |
38462edf JJ |
1598 | exp.X_add_symbol = after_size_address; |
1599 | exp.X_op_symbol = cie->start_address; | |
3251495b RH |
1600 | exp.X_add_number = 0; |
1601 | emit_expr (&exp, offset_size); /* CIE offset. */ | |
38462edf JJ |
1602 | } |
1603 | else | |
1604 | { | |
3251495b | 1605 | TC_DWARF2_EMIT_OFFSET (cie->start_address, offset_size); |
38462edf | 1606 | } |
364b6d8b | 1607 | |
38462edf JJ |
1608 | if (eh_frame) |
1609 | { | |
3251495b RH |
1610 | exp.X_op = O_subtract; |
1611 | exp.X_add_number = 0; | |
3dd24306 | 1612 | #if CFI_DIFF_EXPR_OK |
38462edf JJ |
1613 | exp.X_add_symbol = fde->start_address; |
1614 | exp.X_op_symbol = symbol_temp_new_now (); | |
1615 | emit_expr (&exp, DWARF2_FDE_RELOC_SIZE); /* Code offset. */ | |
364b6d8b | 1616 | #else |
38462edf JJ |
1617 | exp.X_op = O_symbol; |
1618 | exp.X_add_symbol = fde->start_address; | |
364b6d8b | 1619 | #ifdef tc_cfi_emit_pcrel_expr |
38462edf | 1620 | tc_cfi_emit_pcrel_expr (&exp, DWARF2_FDE_RELOC_SIZE); /* Code offset. */ |
364b6d8b | 1621 | #else |
38462edf | 1622 | emit_expr (&exp, DWARF2_FDE_RELOC_SIZE); /* Code offset. */ |
364b6d8b | 1623 | #endif |
364b6d8b | 1624 | #endif |
38462edf JJ |
1625 | addr_size = DWARF2_FDE_RELOC_SIZE; |
1626 | } | |
1627 | else | |
1628 | { | |
3251495b | 1629 | exp.X_op = O_symbol; |
38462edf | 1630 | exp.X_add_symbol = fde->start_address; |
3251495b | 1631 | exp.X_add_number = 0; |
38462edf JJ |
1632 | addr_size = DWARF2_ADDR_SIZE (stdoutput); |
1633 | emit_expr (&exp, addr_size); | |
1634 | } | |
54cfded0 | 1635 | |
38462edf | 1636 | exp.X_op = O_subtract; |
a4447b93 | 1637 | exp.X_add_symbol = fde->end_address; |
289040ca | 1638 | exp.X_op_symbol = fde->start_address; /* Code length. */ |
3251495b | 1639 | exp.X_add_number = 0; |
38462edf | 1640 | emit_expr (&exp, addr_size); |
54cfded0 | 1641 | |
9b8ae42e | 1642 | augmentation_size = encoding_size (fde->lsda_encoding); |
38462edf JJ |
1643 | if (eh_frame) |
1644 | out_uleb128 (augmentation_size); /* Augmentation size. */ | |
9b8ae42e JJ |
1645 | |
1646 | if (fde->lsda_encoding != DW_EH_PE_omit) | |
1647 | { | |
1648 | exp = fde->lsda; | |
1649 | if ((fde->lsda_encoding & 0x70) == DW_EH_PE_pcrel) | |
1650 | { | |
2c678708 | 1651 | #if CFI_DIFF_LSDA_OK |
9b8ae42e JJ |
1652 | exp.X_op = O_subtract; |
1653 | exp.X_op_symbol = symbol_temp_new_now (); | |
1654 | emit_expr (&exp, augmentation_size); | |
1655 | #elif defined (tc_cfi_emit_pcrel_expr) | |
1656 | tc_cfi_emit_pcrel_expr (&exp, augmentation_size); | |
1657 | #else | |
1658 | abort (); | |
1659 | #endif | |
1660 | } | |
1661 | else | |
1662 | emit_expr (&exp, augmentation_size); | |
1663 | } | |
39b82151 | 1664 | |
a4447b93 | 1665 | for (; first; first = first->next) |
72b016b4 NC |
1666 | { |
1667 | if (first->cur_seg == fde->cseg) | |
1668 | output_cfi_insn (first); | |
1669 | } | |
39b82151 | 1670 | |
4df6ce47 | 1671 | frag_align (align, DW_CFA_nop, 0); |
a4447b93 RH |
1672 | symbol_set_value_now (end_address); |
1673 | } | |
1674 | ||
1675 | static struct cie_entry * | |
38462edf JJ |
1676 | select_cie_for_fde (struct fde_entry *fde, bfd_boolean eh_frame, |
1677 | struct cfi_insn_data **pfirst, int align) | |
a4447b93 RH |
1678 | { |
1679 | struct cfi_insn_data *i, *j; | |
1680 | struct cie_entry *cie; | |
1681 | ||
1682 | for (cie = cie_root; cie; cie = cie->next) | |
39b82151 | 1683 | { |
72b016b4 NC |
1684 | if (cie->cur_seg != fde->cseg |
1685 | || cie->return_column != fde->return_column | |
9b8ae42e JJ |
1686 | || cie->signal_frame != fde->signal_frame |
1687 | || cie->per_encoding != fde->per_encoding | |
1688 | || cie->lsda_encoding != fde->lsda_encoding) | |
a4447b93 | 1689 | continue; |
9b8ae42e JJ |
1690 | if (cie->per_encoding != DW_EH_PE_omit) |
1691 | { | |
1692 | if (cie->personality.X_op != fde->personality.X_op | |
1693 | || cie->personality.X_add_number | |
1694 | != fde->personality.X_add_number) | |
1695 | continue; | |
1696 | switch (cie->personality.X_op) | |
1697 | { | |
1698 | case O_constant: | |
1699 | if (cie->personality.X_unsigned != fde->personality.X_unsigned) | |
1700 | continue; | |
1701 | break; | |
1702 | case O_symbol: | |
1703 | if (cie->personality.X_add_symbol | |
1704 | != fde->personality.X_add_symbol) | |
1705 | continue; | |
1706 | break; | |
1707 | default: | |
1708 | abort (); | |
1709 | } | |
1710 | } | |
a4447b93 RH |
1711 | for (i = cie->first, j = fde->data; |
1712 | i != cie->last && j != NULL; | |
1713 | i = i->next, j = j->next) | |
39b82151 | 1714 | { |
a4447b93 RH |
1715 | if (i->insn != j->insn) |
1716 | goto fail; | |
1717 | switch (i->insn) | |
1718 | { | |
1719 | case DW_CFA_advance_loc: | |
289040ca NC |
1720 | case DW_CFA_remember_state: |
1721 | /* We reached the first advance/remember in the FDE, | |
1722 | but did not reach the end of the CIE list. */ | |
a4447b93 RH |
1723 | goto fail; |
1724 | ||
1725 | case DW_CFA_offset: | |
1726 | case DW_CFA_def_cfa: | |
1727 | if (i->u.ri.reg != j->u.ri.reg) | |
1728 | goto fail; | |
1729 | if (i->u.ri.offset != j->u.ri.offset) | |
1730 | goto fail; | |
1731 | break; | |
1732 | ||
1733 | case DW_CFA_register: | |
1734 | if (i->u.rr.reg1 != j->u.rr.reg1) | |
1735 | goto fail; | |
1736 | if (i->u.rr.reg2 != j->u.rr.reg2) | |
1737 | goto fail; | |
1738 | break; | |
1739 | ||
1740 | case DW_CFA_def_cfa_register: | |
2be24b54 ML |
1741 | case DW_CFA_restore: |
1742 | case DW_CFA_undefined: | |
1743 | case DW_CFA_same_value: | |
a4447b93 RH |
1744 | if (i->u.r != j->u.r) |
1745 | goto fail; | |
1746 | break; | |
1747 | ||
1748 | case DW_CFA_def_cfa_offset: | |
1749 | if (i->u.i != j->u.i) | |
1750 | goto fail; | |
1751 | break; | |
1752 | ||
cdfbf930 | 1753 | case CFI_escape: |
f1c4cc75 | 1754 | case CFI_val_encoded_addr: |
cdfbf930 RH |
1755 | /* Don't bother matching these for now. */ |
1756 | goto fail; | |
1757 | ||
a4447b93 RH |
1758 | default: |
1759 | abort (); | |
1760 | } | |
39b82151 | 1761 | } |
a4447b93 RH |
1762 | |
1763 | /* Success if we reached the end of the CIE list, and we've either | |
289040ca NC |
1764 | run out of FDE entries or we've encountered an advance, |
1765 | remember, or escape. */ | |
e9fad691 AM |
1766 | if (i == cie->last |
1767 | && (!j | |
1768 | || j->insn == DW_CFA_advance_loc | |
289040ca | 1769 | || j->insn == DW_CFA_remember_state |
f1c4cc75 RH |
1770 | || j->insn == CFI_escape |
1771 | || j->insn == CFI_val_encoded_addr)) | |
39b82151 | 1772 | { |
a4447b93 RH |
1773 | *pfirst = j; |
1774 | return cie; | |
39b82151 ML |
1775 | } |
1776 | ||
a4447b93 | 1777 | fail:; |
54cfded0 AM |
1778 | } |
1779 | ||
1e9cc1c2 | 1780 | cie = (struct cie_entry *) xmalloc (sizeof (struct cie_entry)); |
a4447b93 RH |
1781 | cie->next = cie_root; |
1782 | cie_root = cie; | |
72b016b4 | 1783 | cie->cur_seg = fde->cseg; |
a4447b93 | 1784 | cie->return_column = fde->return_column; |
63752a75 | 1785 | cie->signal_frame = fde->signal_frame; |
9b8ae42e JJ |
1786 | cie->per_encoding = fde->per_encoding; |
1787 | cie->lsda_encoding = fde->lsda_encoding; | |
1788 | cie->personality = fde->personality; | |
a4447b93 | 1789 | cie->first = fde->data; |
54cfded0 | 1790 | |
a4447b93 | 1791 | for (i = cie->first; i ; i = i->next) |
e9fad691 | 1792 | if (i->insn == DW_CFA_advance_loc |
289040ca | 1793 | || i->insn == DW_CFA_remember_state |
f1c4cc75 RH |
1794 | || i->insn == CFI_escape |
1795 | || i->insn == CFI_val_encoded_addr) | |
a4447b93 | 1796 | break; |
54cfded0 | 1797 | |
a4447b93 RH |
1798 | cie->last = i; |
1799 | *pfirst = i; | |
38462edf JJ |
1800 | |
1801 | output_cie (cie, eh_frame, align); | |
54cfded0 | 1802 | |
a4447b93 | 1803 | return cie; |
54cfded0 AM |
1804 | } |
1805 | ||
38462edf JJ |
1806 | #ifdef md_reg_eh_frame_to_debug_frame |
1807 | static void | |
72b016b4 | 1808 | cfi_change_reg_numbers (struct cfi_insn_data *insn, segT ccseg) |
38462edf JJ |
1809 | { |
1810 | for (; insn; insn = insn->next) | |
72b016b4 NC |
1811 | { |
1812 | if (insn->cur_seg != ccseg) | |
1813 | continue; | |
1814 | switch (insn->insn) | |
1815 | { | |
1816 | case DW_CFA_advance_loc: | |
1817 | case DW_CFA_def_cfa_offset: | |
1818 | case DW_CFA_remember_state: | |
1819 | case DW_CFA_restore_state: | |
1820 | case DW_CFA_GNU_window_save: | |
1821 | case CFI_escape: | |
1822 | break; | |
38462edf | 1823 | |
72b016b4 NC |
1824 | case DW_CFA_def_cfa: |
1825 | case DW_CFA_offset: | |
1826 | insn->u.ri.reg = md_reg_eh_frame_to_debug_frame (insn->u.ri.reg); | |
1827 | break; | |
38462edf | 1828 | |
72b016b4 NC |
1829 | case DW_CFA_def_cfa_register: |
1830 | case DW_CFA_undefined: | |
1831 | case DW_CFA_same_value: | |
1832 | case DW_CFA_restore: | |
1833 | insn->u.r = md_reg_eh_frame_to_debug_frame (insn->u.r); | |
1834 | break; | |
38462edf | 1835 | |
72b016b4 NC |
1836 | case DW_CFA_register: |
1837 | insn->u.rr.reg1 = md_reg_eh_frame_to_debug_frame (insn->u.rr.reg1); | |
1838 | insn->u.rr.reg2 = md_reg_eh_frame_to_debug_frame (insn->u.rr.reg2); | |
1839 | break; | |
38462edf | 1840 | |
72b016b4 NC |
1841 | case CFI_val_encoded_addr: |
1842 | insn->u.ea.reg = md_reg_eh_frame_to_debug_frame (insn->u.ea.reg); | |
1843 | break; | |
38462edf | 1844 | |
72b016b4 NC |
1845 | default: |
1846 | abort (); | |
1847 | } | |
1848 | } | |
38462edf JJ |
1849 | } |
1850 | #else | |
72b016b4 | 1851 | #define cfi_change_reg_numbers(insn, cseg) do { } while (0) |
38462edf JJ |
1852 | #endif |
1853 | ||
72b016b4 NC |
1854 | static segT |
1855 | get_cfi_seg (segT cseg, const char *base, flagword flags, int align) | |
1856 | { | |
1857 | struct dwcfi_seg_list *l; | |
1858 | ||
1859 | l = dwcfi_hash_find_or_make (cseg, base, flags); | |
1860 | ||
1861 | subseg_set (l->seg, l->subseg); | |
1862 | record_alignment (l->seg, align); | |
1863 | return l->seg; | |
1864 | } | |
1865 | ||
54cfded0 | 1866 | void |
a4447b93 | 1867 | cfi_finish (void) |
54cfded0 | 1868 | { |
72b016b4 NC |
1869 | struct cie_entry *cie, *cie_next; |
1870 | segT cfi_seg, ccseg; | |
a4447b93 | 1871 | struct fde_entry *fde; |
72b016b4 NC |
1872 | struct cfi_insn_data *first; |
1873 | int save_flag_traditional_format, seek_next_seg; | |
54cfded0 | 1874 | |
a4447b93 RH |
1875 | if (all_fde_data == 0) |
1876 | return; | |
54cfded0 | 1877 | |
38462edf JJ |
1878 | if ((cfi_sections & CFI_EMIT_eh_frame) != 0) |
1879 | { | |
38462edf JJ |
1880 | /* Make sure check_eh_frame doesn't do anything with our output. */ |
1881 | save_flag_traditional_format = flag_traditional_format; | |
1882 | flag_traditional_format = 1; | |
eafbc43f | 1883 | |
72b016b4 NC |
1884 | do |
1885 | { | |
1886 | ccseg = NULL; | |
1887 | cfi_seg = NULL; | |
1888 | seek_next_seg = 0; | |
1889 | for (cie = cie_root; cie; cie = cie_next) | |
38462edf | 1890 | { |
72b016b4 NC |
1891 | cie_next = cie->next; |
1892 | free ((void *) cie); | |
38462edf | 1893 | } |
72b016b4 | 1894 | cie_root = NULL; |
38462edf | 1895 | |
72b016b4 NC |
1896 | for (fde = all_fde_data; fde ; fde = fde->next) |
1897 | { | |
1898 | if (fde->handled != 0) | |
1899 | continue; | |
1900 | if (seek_next_seg && fde->cseg != ccseg) | |
1901 | { | |
1902 | seek_next_seg = 2; | |
1903 | continue; | |
1904 | } | |
1905 | if (!seek_next_seg) | |
1906 | { | |
1907 | ccseg = fde->cseg; | |
1908 | /* Open .eh_frame section. */ | |
1909 | cfi_seg = get_cfi_seg (ccseg, ".eh_frame", | |
1910 | SEC_ALLOC | SEC_LOAD | SEC_DATA | |
1911 | | DWARF2_EH_FRAME_READ_ONLY, | |
1912 | EH_FRAME_ALIGNMENT); | |
1913 | #ifdef md_fix_up_eh_frame | |
1914 | md_fix_up_eh_frame (cfi_seg); | |
1915 | #endif | |
1916 | seek_next_seg = 1; | |
1917 | } | |
1918 | fde->handled = 1; | |
1919 | ||
1920 | if (fde->end_address == NULL) | |
1921 | { | |
1922 | as_bad (_("open CFI at the end of file; missing .cfi_endproc directive")); | |
1923 | fde->end_address = fde->start_address; | |
1924 | } | |
1925 | ||
1926 | cie = select_cie_for_fde (fde, TRUE, &first, 2); | |
1927 | output_fde (fde, cie, TRUE, first, | |
1928 | fde->next == NULL ? EH_FRAME_ALIGNMENT : 2); | |
1929 | } | |
38462edf | 1930 | } |
72b016b4 NC |
1931 | while (seek_next_seg == 2); |
1932 | ||
1933 | for (fde = all_fde_data; fde ; fde = fde->next) | |
1934 | fde->handled = 0; | |
38462edf JJ |
1935 | |
1936 | flag_traditional_format = save_flag_traditional_format; | |
1937 | } | |
1938 | ||
1939 | if ((cfi_sections & CFI_EMIT_debug_frame) != 0) | |
a4447b93 | 1940 | { |
38462edf | 1941 | int alignment = ffs (DWARF2_ADDR_SIZE (stdoutput)) - 1; |
a4447b93 | 1942 | |
72b016b4 NC |
1943 | do |
1944 | { | |
1945 | ccseg = NULL; | |
1946 | cfi_seg = NULL; | |
1947 | seek_next_seg = 0; | |
1948 | for (cie = cie_root; cie; cie = cie_next) | |
38462edf | 1949 | { |
72b016b4 NC |
1950 | cie_next = cie->next; |
1951 | free ((void *) cie); | |
38462edf | 1952 | } |
72b016b4 | 1953 | cie_root = NULL; |
38462edf | 1954 | |
72b016b4 NC |
1955 | for (fde = all_fde_data; fde ; fde = fde->next) |
1956 | { | |
1957 | if (fde->handled != 0) | |
1958 | continue; | |
1959 | if (seek_next_seg && fde->cseg != ccseg) | |
1960 | { | |
1961 | seek_next_seg = 2; | |
1962 | continue; | |
1963 | } | |
1964 | if (!seek_next_seg) | |
1965 | { | |
1966 | ccseg = fde->cseg; | |
1967 | /* Open .debug_frame section. */ | |
1968 | cfi_seg = get_cfi_seg (ccseg, ".debug_frame", | |
1969 | SEC_READONLY | SEC_DEBUGGING, | |
1970 | alignment); | |
1971 | seek_next_seg = 1; | |
1972 | } | |
1973 | fde->handled = 1; | |
1974 | if (fde->end_address == NULL) | |
1975 | { | |
1976 | as_bad (_("open CFI at the end of file; missing .cfi_endproc directive")); | |
1977 | fde->end_address = fde->start_address; | |
1978 | } | |
1979 | ||
1980 | fde->per_encoding = DW_EH_PE_omit; | |
1981 | fde->lsda_encoding = DW_EH_PE_omit; | |
1982 | cfi_change_reg_numbers (fde->data, ccseg); | |
1983 | cie = select_cie_for_fde (fde, FALSE, &first, alignment); | |
1984 | output_fde (fde, cie, FALSE, first, alignment); | |
1985 | } | |
38462edf | 1986 | } |
72b016b4 NC |
1987 | while (seek_next_seg == 2); |
1988 | ||
1989 | for (fde = all_fde_data; fde ; fde = fde->next) | |
1990 | fde->handled = 0; | |
38462edf | 1991 | } |
54cfded0 | 1992 | } |
0a7b15ff JB |
1993 | |
1994 | #else /* TARGET_USE_CFIPOP */ | |
d58a1929 | 1995 | |
5ff2bd08 | 1996 | /* Emit an intelligible error message for missing support. */ |
d58a1929 RH |
1997 | |
1998 | static void | |
1999 | dot_cfi_dummy (int ignored ATTRIBUTE_UNUSED) | |
2000 | { | |
2001 | as_bad (_("CFI is not supported for this target")); | |
2002 | ignore_rest_of_line (); | |
2003 | } | |
2004 | ||
2005 | const pseudo_typeS cfi_pseudo_table[] = | |
2006 | { | |
2007 | { "cfi_sections", dot_cfi_dummy, 0 }, | |
2008 | { "cfi_startproc", dot_cfi_dummy, 0 }, | |
2009 | { "cfi_endproc", dot_cfi_dummy, 0 }, | |
2010 | { "cfi_def_cfa", dot_cfi_dummy, 0 }, | |
2011 | { "cfi_def_cfa_register", dot_cfi_dummy, 0 }, | |
2012 | { "cfi_def_cfa_offset", dot_cfi_dummy, 0 }, | |
2013 | { "cfi_adjust_cfa_offset", dot_cfi_dummy, 0 }, | |
2014 | { "cfi_offset", dot_cfi_dummy, 0 }, | |
2015 | { "cfi_rel_offset", dot_cfi_dummy, 0 }, | |
2016 | { "cfi_register", dot_cfi_dummy, 0 }, | |
2017 | { "cfi_return_column", dot_cfi_dummy, 0 }, | |
2018 | { "cfi_restore", dot_cfi_dummy, 0 }, | |
2019 | { "cfi_undefined", dot_cfi_dummy, 0 }, | |
2020 | { "cfi_same_value", dot_cfi_dummy, 0 }, | |
2021 | { "cfi_remember_state", dot_cfi_dummy, 0 }, | |
2022 | { "cfi_restore_state", dot_cfi_dummy, 0 }, | |
2023 | { "cfi_window_save", dot_cfi_dummy, 0 }, | |
2024 | { "cfi_escape", dot_cfi_dummy, 0 }, | |
2025 | { "cfi_signal_frame", dot_cfi_dummy, 0 }, | |
2026 | { "cfi_personality", dot_cfi_dummy, 0 }, | |
2027 | { "cfi_lsda", dot_cfi_dummy, 0 }, | |
2028 | { "cfi_val_encoded_addr", dot_cfi_dummy, 0 }, | |
2029 | { NULL, NULL, 0 } | |
2030 | }; | |
2031 | ||
0a7b15ff JB |
2032 | void |
2033 | cfi_finish (void) | |
2034 | { | |
2035 | } | |
2036 | #endif /* TARGET_USE_CFIPOP */ |