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54cfded0 | 1 | /* dw2gencfi.c - Support for generating Dwarf2 CFI information. |
fd67aa11 | 2 | Copyright (C) 2003-2024 Free Software Foundation, Inc. |
54cfded0 AM |
3 | Contributed by Michal Ludvig <mludvig@suse.cz> |
4 | ||
5 | This file is part of GAS, the GNU Assembler. | |
6 | ||
7 | GAS is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
ec2655a6 | 9 | the Free Software Foundation; either version 3, or (at your option) |
54cfded0 AM |
10 | any later version. |
11 | ||
12 | GAS is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with GAS; see the file COPYING. If not, write to the Free | |
4b4da160 NC |
19 | Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA |
20 | 02110-1301, USA. */ | |
54cfded0 | 21 | |
54cfded0 AM |
22 | #include "as.h" |
23 | #include "dw2gencfi.h" | |
ae424f82 | 24 | #include "subsegs.h" |
38462edf | 25 | #include "dwarf2dbg.h" |
b52c4ee4 | 26 | #include "gen-sframe.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 | ||
853ba678 J |
67 | #define EH_FRAME_LINKONCE (SUPPORT_FRAME_LINKONCE || compact_eh \ |
68 | || TARGET_MULTIPLE_EH_FRAME_SECTIONS) | |
2f0c68f2 | 69 | |
38462edf | 70 | #ifndef DWARF2_FORMAT |
72b016b4 | 71 | #define DWARF2_FORMAT(SEC) dwarf2_format_32bit |
38462edf JJ |
72 | #endif |
73 | ||
f1c4cc75 | 74 | #ifndef DWARF2_ADDR_SIZE |
72b016b4 | 75 | #define DWARF2_ADDR_SIZE(bfd) (bfd_arch_bits_per_address (bfd) / 8) |
f1c4cc75 RH |
76 | #endif |
77 | ||
2f0c68f2 | 78 | #if MULTIPLE_FRAME_SECTIONS |
6303c4ae | 79 | #define CUR_SEG(structp) structp->cur_seg |
34bca508 | 80 | #define SET_CUR_SEG(structp, seg) structp->cur_seg = seg |
6303c4ae AM |
81 | #define HANDLED(structp) structp->handled |
82 | #define SET_HANDLED(structp, val) structp->handled = val | |
83 | #else | |
84 | #define CUR_SEG(structp) NULL | |
85 | #define SET_CUR_SEG(structp, seg) (void) (0 && seg) | |
86 | #define HANDLED(structp) 0 | |
87 | #define SET_HANDLED(structp, val) (void) (0 && val) | |
88 | #endif | |
89 | ||
2f0c68f2 CM |
90 | #ifndef tc_cfi_reloc_for_encoding |
91 | #define tc_cfi_reloc_for_encoding(e) BFD_RELOC_NONE | |
92 | #endif | |
93 | ||
b52c4ee4 IB |
94 | /* Targets which support SFrame format will define this and return true. */ |
95 | #ifndef support_sframe_p | |
96 | # define support_sframe_p() false | |
97 | #endif | |
98 | ||
72b016b4 NC |
99 | /* Private segment collection list. */ |
100 | struct dwcfi_seg_list | |
101 | { | |
102 | segT seg; | |
103 | int subseg; | |
104 | char * seg_name; | |
105 | }; | |
106 | ||
2f0c68f2 | 107 | #ifdef SUPPORT_COMPACT_EH |
5b7c81bd | 108 | static bool compact_eh; |
2f0c68f2 CM |
109 | #else |
110 | #define compact_eh 0 | |
111 | #endif | |
72b016b4 | 112 | |
494b2fc8 | 113 | static htab_t dwcfi_hash; |
2f0c68f2 CM |
114 | \f |
115 | /* Emit a single byte into the current segment. */ | |
116 | ||
117 | static inline void | |
118 | out_one (int byte) | |
119 | { | |
120 | FRAG_APPEND_1_CHAR (byte); | |
121 | } | |
122 | ||
123 | /* Emit a two-byte word into the current segment. */ | |
124 | ||
125 | static inline void | |
126 | out_two (int data) | |
127 | { | |
128 | md_number_to_chars (frag_more (2), data, 2); | |
129 | } | |
130 | ||
131 | /* Emit a four byte word into the current segment. */ | |
132 | ||
133 | static inline void | |
134 | out_four (int data) | |
135 | { | |
136 | md_number_to_chars (frag_more (4), data, 4); | |
137 | } | |
138 | ||
139 | /* Emit an unsigned "little-endian base 128" number. */ | |
140 | ||
141 | static void | |
142 | out_uleb128 (addressT value) | |
143 | { | |
144 | output_leb128 (frag_more (sizeof_leb128 (value, 0)), value, 0); | |
145 | } | |
146 | ||
147 | /* Emit an unsigned "little-endian base 128" number. */ | |
148 | ||
149 | static void | |
150 | out_sleb128 (offsetT value) | |
151 | { | |
152 | output_leb128 (frag_more (sizeof_leb128 (value, 1)), value, 1); | |
153 | } | |
154 | ||
ea0de82e | 155 | static unsigned int |
2f0c68f2 CM |
156 | encoding_size (unsigned char encoding) |
157 | { | |
158 | if (encoding == DW_EH_PE_omit) | |
159 | return 0; | |
160 | switch (encoding & 0x7) | |
161 | { | |
162 | case 0: | |
163 | return bfd_get_arch_size (stdoutput) == 64 ? 8 : 4; | |
164 | case DW_EH_PE_udata2: | |
165 | return 2; | |
166 | case DW_EH_PE_udata4: | |
167 | return 4; | |
168 | case DW_EH_PE_udata8: | |
169 | return 8; | |
170 | default: | |
171 | abort (); | |
172 | } | |
173 | } | |
174 | ||
175 | /* Emit expression EXP in ENCODING. If EMIT_ENCODING is true, first | |
176 | emit a byte containing ENCODING. */ | |
177 | ||
178 | static void | |
5b7c81bd | 179 | emit_expr_encoded (expressionS *exp, int encoding, bool emit_encoding) |
2f0c68f2 | 180 | { |
ea0de82e | 181 | unsigned int size = encoding_size (encoding); |
2f0c68f2 CM |
182 | bfd_reloc_code_real_type code; |
183 | ||
184 | if (encoding == DW_EH_PE_omit) | |
185 | return; | |
72b016b4 | 186 | |
2f0c68f2 CM |
187 | if (emit_encoding) |
188 | out_one (encoding); | |
189 | ||
190 | code = tc_cfi_reloc_for_encoding (encoding); | |
191 | if (code != BFD_RELOC_NONE) | |
192 | { | |
193 | reloc_howto_type *howto = bfd_reloc_type_lookup (stdoutput, code); | |
194 | char *p = frag_more (size); | |
86b9fea1 | 195 | gas_assert (size == (unsigned) howto->bitsize / 8); |
2f0c68f2 CM |
196 | md_number_to_chars (p, 0, size); |
197 | fix_new (frag_now, p - frag_now->fr_literal, size, exp->X_add_symbol, | |
198 | exp->X_add_number, howto->pc_relative, code); | |
199 | } | |
200 | else if ((encoding & 0x70) == DW_EH_PE_pcrel) | |
201 | { | |
202 | #if CFI_DIFF_EXPR_OK | |
203 | expressionS tmp = *exp; | |
204 | tmp.X_op = O_subtract; | |
205 | tmp.X_op_symbol = symbol_temp_new_now (); | |
206 | emit_expr (&tmp, size); | |
207 | #elif defined (tc_cfi_emit_pcrel_expr) | |
208 | tc_cfi_emit_pcrel_expr (exp, size); | |
209 | #else | |
210 | abort (); | |
211 | #endif | |
212 | } | |
213 | else | |
214 | emit_expr (exp, size); | |
215 | } | |
216 | \f | |
72b016b4 NC |
217 | /* Build based on segment the derived .debug_... |
218 | segment name containing origin segment's postfix name part. */ | |
219 | ||
220 | static char * | |
221 | get_debugseg_name (segT seg, const char *base_name) | |
222 | { | |
3076e594 NC |
223 | const char * name; |
224 | const char * dollar; | |
225 | const char * dot; | |
72b016b4 | 226 | |
5a210b9f AM |
227 | if (!seg |
228 | || (name = bfd_section_name (seg)) == NULL | |
229 | || *name == 0) | |
230 | return notes_strdup (base_name); | |
3076e594 NC |
231 | |
232 | dollar = strchr (name, '$'); | |
233 | dot = strchr (name + 1, '.'); | |
234 | ||
235 | if (!dollar && !dot) | |
72b016b4 | 236 | { |
3076e594 NC |
237 | if (!strcmp (base_name, ".eh_frame_entry") |
238 | && strcmp (name, ".text") != 0) | |
5a210b9f | 239 | return notes_concat (base_name, ".", name, NULL); |
3076e594 NC |
240 | |
241 | name = ""; | |
72b016b4 | 242 | } |
3076e594 NC |
243 | else if (!dollar) |
244 | name = dot; | |
245 | else if (!dot) | |
246 | name = dollar; | |
247 | else if (dot < dollar) | |
248 | name = dot; | |
249 | else | |
250 | name = dollar; | |
72b016b4 | 251 | |
5a210b9f | 252 | return notes_concat (base_name, name, NULL); |
72b016b4 NC |
253 | } |
254 | ||
255 | /* Allocate a dwcfi_seg_list structure. */ | |
256 | ||
257 | static struct dwcfi_seg_list * | |
258 | alloc_debugseg_item (segT seg, int subseg, char *name) | |
259 | { | |
260 | struct dwcfi_seg_list *r; | |
261 | ||
5a210b9f | 262 | r = notes_alloc (sizeof (*r) + strlen (name)); |
72b016b4 NC |
263 | r->seg = seg; |
264 | r->subseg = subseg; | |
265 | r->seg_name = name; | |
266 | return r; | |
267 | } | |
268 | ||
269 | static segT | |
270 | is_now_linkonce_segment (void) | |
271 | { | |
2f0c68f2 CM |
272 | if (compact_eh) |
273 | return now_seg; | |
274 | ||
853ba678 J |
275 | if (TARGET_MULTIPLE_EH_FRAME_SECTIONS) |
276 | return now_seg; | |
277 | ||
fd361982 | 278 | if ((bfd_section_flags (now_seg) |
72b016b4 NC |
279 | & (SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD |
280 | | SEC_LINK_DUPLICATES_ONE_ONLY | SEC_LINK_DUPLICATES_SAME_SIZE | |
281 | | SEC_LINK_DUPLICATES_SAME_CONTENTS)) != 0) | |
282 | return now_seg; | |
72b016b4 NC |
283 | return NULL; |
284 | } | |
285 | ||
286 | /* Generate debug... segment with same linkonce properties | |
287 | of based segment. */ | |
288 | ||
289 | static segT | |
290 | make_debug_seg (segT cseg, char *name, int sflags) | |
291 | { | |
292 | segT save_seg = now_seg; | |
293 | int save_subseg = now_subseg; | |
294 | segT r; | |
295 | flagword flags; | |
296 | ||
297 | r = subseg_new (name, 0); | |
298 | ||
299 | /* Check if code segment is marked as linked once. */ | |
300 | if (!cseg) | |
301 | flags = 0; | |
302 | else | |
fd361982 AM |
303 | flags = (bfd_section_flags (cseg) |
304 | & (SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD | |
305 | | SEC_LINK_DUPLICATES_ONE_ONLY | SEC_LINK_DUPLICATES_SAME_SIZE | |
306 | | SEC_LINK_DUPLICATES_SAME_CONTENTS)); | |
72b016b4 NC |
307 | |
308 | /* Add standard section flags. */ | |
309 | flags |= sflags; | |
310 | ||
311 | /* Apply possibly linked once flags to new generated segment, too. */ | |
fd361982 | 312 | if (!bfd_set_section_flags (r, flags)) |
72b016b4 NC |
313 | as_bad (_("bfd_set_section_flags: %s"), |
314 | bfd_errmsg (bfd_get_error ())); | |
315 | ||
316 | /* Restore to previous segment. */ | |
317 | if (save_seg != NULL) | |
318 | subseg_set (save_seg, save_subseg); | |
319 | return r; | |
320 | } | |
321 | ||
72b016b4 NC |
322 | static struct dwcfi_seg_list * |
323 | dwcfi_hash_find (char *name) | |
324 | { | |
494b2fc8 | 325 | return (struct dwcfi_seg_list *) str_hash_find (dwcfi_hash, name); |
72b016b4 NC |
326 | } |
327 | ||
328 | static struct dwcfi_seg_list * | |
329 | dwcfi_hash_find_or_make (segT cseg, const char *base_name, int flags) | |
330 | { | |
331 | struct dwcfi_seg_list *item; | |
332 | char *name; | |
333 | ||
334 | /* Initialize dwcfi_hash once. */ | |
335 | if (!dwcfi_hash) | |
494b2fc8 | 336 | dwcfi_hash = str_htab_create (); |
72b016b4 NC |
337 | |
338 | name = get_debugseg_name (cseg, base_name); | |
339 | ||
340 | item = dwcfi_hash_find (name); | |
341 | if (!item) | |
342 | { | |
343 | item = alloc_debugseg_item (make_debug_seg (cseg, name, flags), 0, name); | |
344 | ||
fe0e921f | 345 | str_hash_insert (dwcfi_hash, item->seg_name, item, 0); |
72b016b4 NC |
346 | } |
347 | else | |
5a210b9f | 348 | notes_free (name); |
72b016b4 NC |
349 | |
350 | return item; | |
351 | } | |
352 | ||
3251495b RH |
353 | /* ??? Share this with dwarf2cfg.c. */ |
354 | #ifndef TC_DWARF2_EMIT_OFFSET | |
355 | #define TC_DWARF2_EMIT_OFFSET generic_dwarf2_emit_offset | |
356 | ||
357 | /* Create an offset to .dwarf2_*. */ | |
358 | ||
359 | static void | |
360 | generic_dwarf2_emit_offset (symbolS *symbol, unsigned int size) | |
361 | { | |
362 | expressionS exp; | |
363 | ||
364 | exp.X_op = O_symbol; | |
365 | exp.X_add_symbol = symbol; | |
366 | exp.X_add_number = 0; | |
367 | emit_expr (&exp, size); | |
368 | } | |
369 | #endif | |
370 | ||
72b016b4 NC |
371 | struct cfi_escape_data |
372 | { | |
1e9cc1c2 NC |
373 | struct cfi_escape_data *next; |
374 | expressionS exp; | |
375 | }; | |
a4447b93 | 376 | |
a4447b93 | 377 | struct cie_entry |
39b82151 | 378 | { |
a4447b93 | 379 | struct cie_entry *next; |
2f0c68f2 | 380 | #if MULTIPLE_FRAME_SECTIONS |
72b016b4 | 381 | segT cur_seg; |
67ed7401 | 382 | #endif |
a4447b93 RH |
383 | symbolS *start_address; |
384 | unsigned int return_column; | |
63752a75 | 385 | unsigned int signal_frame; |
2f0c68f2 | 386 | unsigned char fde_encoding; |
9b8ae42e JJ |
387 | unsigned char per_encoding; |
388 | unsigned char lsda_encoding; | |
389 | expressionS personality; | |
09038062 ST |
390 | #ifdef tc_cie_entry_extras |
391 | tc_cie_entry_extras | |
392 | #endif | |
a4447b93 | 393 | struct cfi_insn_data *first, *last; |
39b82151 ML |
394 | }; |
395 | ||
a4447b93 | 396 | /* List of FDE entries. */ |
72b016b4 | 397 | |
af385746 | 398 | struct fde_entry *all_fde_data; |
a4447b93 | 399 | static struct fde_entry **last_fde_data = &all_fde_data; |
39b82151 ML |
400 | |
401 | /* List of CIEs so that they could be reused. */ | |
402 | static struct cie_entry *cie_root; | |
403 | ||
a4447b93 | 404 | /* Construct a new FDE structure and add it to the end of the fde list. */ |
54cfded0 | 405 | |
a4447b93 RH |
406 | static struct fde_entry * |
407 | alloc_fde_entry (void) | |
408 | { | |
add39d23 | 409 | struct fde_entry *fde = XCNEW (struct fde_entry); |
54cfded0 | 410 | |
add39d23 | 411 | frchain_now->frch_cfi_data = XCNEW (struct frch_cfi_data); |
ae424f82 | 412 | frchain_now->frch_cfi_data->cur_fde_data = fde; |
a4447b93 RH |
413 | *last_fde_data = fde; |
414 | last_fde_data = &fde->next; | |
6303c4ae AM |
415 | SET_CUR_SEG (fde, is_now_linkonce_segment ()); |
416 | SET_HANDLED (fde, 0); | |
a4447b93 RH |
417 | fde->last = &fde->data; |
418 | fde->return_column = DWARF2_DEFAULT_RETURN_COLUMN; | |
9b8ae42e JJ |
419 | fde->per_encoding = DW_EH_PE_omit; |
420 | fde->lsda_encoding = DW_EH_PE_omit; | |
2f0c68f2 | 421 | fde->eh_header_type = EH_COMPACT_UNKNOWN; |
09038062 ST |
422 | #ifdef tc_fde_entry_init_extra |
423 | tc_fde_entry_init_extra (fde) | |
424 | #endif | |
a4447b93 RH |
425 | |
426 | return fde; | |
427 | } | |
428 | ||
429 | /* The following functions are available for a backend to construct its | |
430 | own unwind information, usually from legacy unwind directives. */ | |
431 | ||
432 | /* Construct a new INSN structure and add it to the end of the insn list | |
433 | for the currently active FDE. */ | |
434 | ||
5b7c81bd | 435 | static bool cfi_sections_set = false; |
2f0c68f2 CM |
436 | static int cfi_sections = CFI_EMIT_eh_frame; |
437 | int all_cfi_sections = 0; | |
438 | static struct fde_entry *last_fde; | |
439 | ||
a4447b93 RH |
440 | static struct cfi_insn_data * |
441 | alloc_cfi_insn_data (void) | |
54cfded0 | 442 | { |
add39d23 | 443 | struct cfi_insn_data *insn = XCNEW (struct cfi_insn_data); |
ae424f82 | 444 | struct fde_entry *cur_fde_data = frchain_now->frch_cfi_data->cur_fde_data; |
a4447b93 RH |
445 | |
446 | *cur_fde_data->last = insn; | |
447 | cur_fde_data->last = &insn->next; | |
6303c4ae | 448 | SET_CUR_SEG (insn, is_now_linkonce_segment ()); |
a4447b93 | 449 | return insn; |
54cfded0 AM |
450 | } |
451 | ||
a4447b93 RH |
452 | /* Construct a new FDE structure that begins at LABEL. */ |
453 | ||
72b016b4 | 454 | void |
a4447b93 | 455 | cfi_new_fde (symbolS *label) |
54cfded0 | 456 | { |
a4447b93 RH |
457 | struct fde_entry *fde = alloc_fde_entry (); |
458 | fde->start_address = label; | |
ae424f82 | 459 | frchain_now->frch_cfi_data->last_address = label; |
54cfded0 AM |
460 | } |
461 | ||
a4447b93 RH |
462 | /* End the currently open FDE. */ |
463 | ||
72b016b4 | 464 | void |
a4447b93 | 465 | cfi_end_fde (symbolS *label) |
54cfded0 | 466 | { |
ae424f82 JJ |
467 | frchain_now->frch_cfi_data->cur_fde_data->end_address = label; |
468 | free (frchain_now->frch_cfi_data); | |
469 | frchain_now->frch_cfi_data = NULL; | |
54cfded0 AM |
470 | } |
471 | ||
040622a7 IB |
472 | /* Set the last FDE .*/ |
473 | void | |
474 | cfi_set_last_fde (struct fde_entry *fde) | |
475 | { | |
476 | last_fde = fde; | |
477 | } | |
478 | ||
a4447b93 RH |
479 | /* Set the return column for the current FDE. */ |
480 | ||
481 | void | |
482 | cfi_set_return_column (unsigned regno) | |
54cfded0 | 483 | { |
ae424f82 | 484 | frchain_now->frch_cfi_data->cur_fde_data->return_column = regno; |
a4447b93 | 485 | } |
54cfded0 | 486 | |
2f0c68f2 CM |
487 | void |
488 | cfi_set_sections (void) | |
489 | { | |
b0cd3f29 | 490 | all_cfi_sections |= cfi_sections; |
2f0c68f2 | 491 | frchain_now->frch_cfi_data->cur_fde_data->sections = all_cfi_sections; |
5b7c81bd | 492 | cfi_sections_set = true; |
2f0c68f2 CM |
493 | } |
494 | ||
2be24b54 ML |
495 | /* Universal functions to store new instructions. */ |
496 | ||
497 | static void | |
72b016b4 | 498 | cfi_add_CFA_insn (int insn) |
2be24b54 ML |
499 | { |
500 | struct cfi_insn_data *insn_ptr = alloc_cfi_insn_data (); | |
501 | ||
502 | insn_ptr->insn = insn; | |
503 | } | |
504 | ||
505 | static void | |
506 | cfi_add_CFA_insn_reg (int insn, unsigned regno) | |
507 | { | |
508 | struct cfi_insn_data *insn_ptr = alloc_cfi_insn_data (); | |
509 | ||
510 | insn_ptr->insn = insn; | |
511 | insn_ptr->u.r = regno; | |
512 | } | |
513 | ||
514 | static void | |
515 | cfi_add_CFA_insn_offset (int insn, offsetT offset) | |
516 | { | |
517 | struct cfi_insn_data *insn_ptr = alloc_cfi_insn_data (); | |
518 | ||
519 | insn_ptr->insn = insn; | |
520 | insn_ptr->u.i = offset; | |
521 | } | |
522 | ||
523 | static void | |
524 | cfi_add_CFA_insn_reg_reg (int insn, unsigned reg1, unsigned reg2) | |
525 | { | |
526 | struct cfi_insn_data *insn_ptr = alloc_cfi_insn_data (); | |
527 | ||
528 | insn_ptr->insn = insn; | |
529 | insn_ptr->u.rr.reg1 = reg1; | |
530 | insn_ptr->u.rr.reg2 = reg2; | |
531 | } | |
532 | ||
533 | static void | |
534 | cfi_add_CFA_insn_reg_offset (int insn, unsigned regno, offsetT offset) | |
535 | { | |
536 | struct cfi_insn_data *insn_ptr = alloc_cfi_insn_data (); | |
537 | ||
538 | insn_ptr->insn = insn; | |
539 | insn_ptr->u.ri.reg = regno; | |
540 | insn_ptr->u.ri.offset = offset; | |
541 | } | |
542 | ||
a4447b93 | 543 | /* Add a CFI insn to advance the PC from the last address to LABEL. */ |
54cfded0 | 544 | |
a4447b93 RH |
545 | void |
546 | cfi_add_advance_loc (symbolS *label) | |
547 | { | |
548 | struct cfi_insn_data *insn = alloc_cfi_insn_data (); | |
7c0295b1 | 549 | |
a4447b93 | 550 | insn->insn = DW_CFA_advance_loc; |
ae424f82 | 551 | insn->u.ll.lab1 = frchain_now->frch_cfi_data->last_address; |
a4447b93 | 552 | insn->u.ll.lab2 = label; |
54cfded0 | 553 | |
ae424f82 | 554 | frchain_now->frch_cfi_data->last_address = label; |
a4447b93 | 555 | } |
54cfded0 | 556 | |
69602580 JB |
557 | /* Add a CFI insn to label the current position in the CFI segment. */ |
558 | ||
559 | void | |
560 | cfi_add_label (const char *name) | |
561 | { | |
562 | unsigned int len = strlen (name) + 1; | |
563 | struct cfi_insn_data *insn = alloc_cfi_insn_data (); | |
564 | ||
565 | insn->insn = CFI_label; | |
566 | obstack_grow (¬es, name, len); | |
567 | insn->u.sym_name = (char *) obstack_finish (¬es); | |
568 | } | |
569 | ||
a4447b93 RH |
570 | /* Add a DW_CFA_offset record to the CFI data. */ |
571 | ||
572 | void | |
573 | cfi_add_CFA_offset (unsigned regno, offsetT offset) | |
574 | { | |
fa87b337 RH |
575 | unsigned int abs_data_align; |
576 | ||
9c2799c2 | 577 | gas_assert (DWARF2_CIE_DATA_ALIGNMENT != 0); |
2be24b54 | 578 | cfi_add_CFA_insn_reg_offset (DW_CFA_offset, regno, offset); |
fa87b337 RH |
579 | |
580 | abs_data_align = (DWARF2_CIE_DATA_ALIGNMENT < 0 | |
581 | ? -DWARF2_CIE_DATA_ALIGNMENT : DWARF2_CIE_DATA_ALIGNMENT); | |
582 | if (offset % abs_data_align) | |
583 | as_bad (_("register save offset not a multiple of %u"), abs_data_align); | |
a4447b93 | 584 | } |
54cfded0 | 585 | |
084303b8 AK |
586 | /* Add a DW_CFA_val_offset record to the CFI data. */ |
587 | ||
588 | void | |
589 | cfi_add_CFA_val_offset (unsigned regno, offsetT offset) | |
590 | { | |
591 | unsigned int abs_data_align; | |
592 | ||
593 | gas_assert (DWARF2_CIE_DATA_ALIGNMENT != 0); | |
594 | cfi_add_CFA_insn_reg_offset (DW_CFA_val_offset, regno, offset); | |
595 | ||
596 | abs_data_align = (DWARF2_CIE_DATA_ALIGNMENT < 0 | |
597 | ? -DWARF2_CIE_DATA_ALIGNMENT : DWARF2_CIE_DATA_ALIGNMENT); | |
598 | if (offset % abs_data_align) | |
599 | as_bad (_("register save offset not a multiple of %u"), abs_data_align); | |
600 | } | |
601 | ||
a4447b93 | 602 | /* Add a DW_CFA_def_cfa record to the CFI data. */ |
54cfded0 | 603 | |
a4447b93 RH |
604 | void |
605 | cfi_add_CFA_def_cfa (unsigned regno, offsetT offset) | |
606 | { | |
2be24b54 | 607 | cfi_add_CFA_insn_reg_offset (DW_CFA_def_cfa, regno, offset); |
ae424f82 | 608 | frchain_now->frch_cfi_data->cur_cfa_offset = offset; |
54cfded0 AM |
609 | } |
610 | ||
a4447b93 RH |
611 | /* Add a DW_CFA_register record to the CFI data. */ |
612 | ||
613 | void | |
614 | cfi_add_CFA_register (unsigned reg1, unsigned reg2) | |
54cfded0 | 615 | { |
2be24b54 | 616 | cfi_add_CFA_insn_reg_reg (DW_CFA_register, reg1, reg2); |
54cfded0 AM |
617 | } |
618 | ||
a4447b93 RH |
619 | /* Add a DW_CFA_def_cfa_register record to the CFI data. */ |
620 | ||
621 | void | |
622 | cfi_add_CFA_def_cfa_register (unsigned regno) | |
54cfded0 | 623 | { |
2be24b54 | 624 | cfi_add_CFA_insn_reg (DW_CFA_def_cfa_register, regno); |
54cfded0 AM |
625 | } |
626 | ||
a4447b93 RH |
627 | /* Add a DW_CFA_def_cfa_offset record to the CFI data. */ |
628 | ||
54cfded0 | 629 | void |
a4447b93 | 630 | cfi_add_CFA_def_cfa_offset (offsetT offset) |
54cfded0 | 631 | { |
2be24b54 | 632 | cfi_add_CFA_insn_offset (DW_CFA_def_cfa_offset, offset); |
ae424f82 | 633 | frchain_now->frch_cfi_data->cur_cfa_offset = offset; |
a4447b93 | 634 | } |
54cfded0 | 635 | |
2be24b54 ML |
636 | void |
637 | cfi_add_CFA_restore (unsigned regno) | |
638 | { | |
639 | cfi_add_CFA_insn_reg (DW_CFA_restore, regno); | |
640 | } | |
641 | ||
642 | void | |
643 | cfi_add_CFA_undefined (unsigned regno) | |
644 | { | |
645 | cfi_add_CFA_insn_reg (DW_CFA_undefined, regno); | |
646 | } | |
647 | ||
648 | void | |
649 | cfi_add_CFA_same_value (unsigned regno) | |
650 | { | |
651 | cfi_add_CFA_insn_reg (DW_CFA_same_value, regno); | |
652 | } | |
653 | ||
654 | void | |
655 | cfi_add_CFA_remember_state (void) | |
656 | { | |
fa87b337 RH |
657 | struct cfa_save_data *p; |
658 | ||
2be24b54 | 659 | cfi_add_CFA_insn (DW_CFA_remember_state); |
fa87b337 | 660 | |
add39d23 | 661 | p = XNEW (struct cfa_save_data); |
ae424f82 JJ |
662 | p->cfa_offset = frchain_now->frch_cfi_data->cur_cfa_offset; |
663 | p->next = frchain_now->frch_cfi_data->cfa_save_stack; | |
664 | frchain_now->frch_cfi_data->cfa_save_stack = p; | |
2be24b54 ML |
665 | } |
666 | ||
667 | void | |
668 | cfi_add_CFA_restore_state (void) | |
669 | { | |
fa87b337 RH |
670 | struct cfa_save_data *p; |
671 | ||
2be24b54 | 672 | cfi_add_CFA_insn (DW_CFA_restore_state); |
fa87b337 | 673 | |
ae424f82 | 674 | p = frchain_now->frch_cfi_data->cfa_save_stack; |
fa87b337 RH |
675 | if (p) |
676 | { | |
ae424f82 JJ |
677 | frchain_now->frch_cfi_data->cur_cfa_offset = p->cfa_offset; |
678 | frchain_now->frch_cfi_data->cfa_save_stack = p->next; | |
fa87b337 RH |
679 | free (p); |
680 | } | |
289040ca NC |
681 | else |
682 | as_bad (_("CFI state restore without previous remember")); | |
2be24b54 ML |
683 | } |
684 | ||
a4447b93 RH |
685 | \f |
686 | /* Parse CFI assembler directives. */ | |
54cfded0 | 687 | |
a4447b93 | 688 | static void dot_cfi (int); |
cdfbf930 | 689 | static void dot_cfi_escape (int); |
a4447b93 RH |
690 | static void dot_cfi_startproc (int); |
691 | static void dot_cfi_endproc (int); | |
2f0c68f2 | 692 | static void dot_cfi_fde_data (int); |
9b8ae42e | 693 | static void dot_cfi_personality (int); |
2f0c68f2 | 694 | static void dot_cfi_personality_id (int); |
9b8ae42e | 695 | static void dot_cfi_lsda (int); |
f1c4cc75 | 696 | static void dot_cfi_val_encoded_addr (int); |
2f0c68f2 | 697 | static void dot_cfi_inline_lsda (int); |
69602580 | 698 | static void dot_cfi_label (int); |
54cfded0 | 699 | |
a4447b93 RH |
700 | const pseudo_typeS cfi_pseudo_table[] = |
701 | { | |
38462edf | 702 | { "cfi_sections", dot_cfi_sections, 0 }, |
a4447b93 RH |
703 | { "cfi_startproc", dot_cfi_startproc, 0 }, |
704 | { "cfi_endproc", dot_cfi_endproc, 0 }, | |
2f0c68f2 | 705 | { "cfi_fde_data", dot_cfi_fde_data, 0 }, |
a4447b93 RH |
706 | { "cfi_def_cfa", dot_cfi, DW_CFA_def_cfa }, |
707 | { "cfi_def_cfa_register", dot_cfi, DW_CFA_def_cfa_register }, | |
708 | { "cfi_def_cfa_offset", dot_cfi, DW_CFA_def_cfa_offset }, | |
709 | { "cfi_adjust_cfa_offset", dot_cfi, CFI_adjust_cfa_offset }, | |
710 | { "cfi_offset", dot_cfi, DW_CFA_offset }, | |
fa87b337 | 711 | { "cfi_rel_offset", dot_cfi, CFI_rel_offset }, |
a4447b93 | 712 | { "cfi_register", dot_cfi, DW_CFA_register }, |
2be24b54 ML |
713 | { "cfi_return_column", dot_cfi, CFI_return_column }, |
714 | { "cfi_restore", dot_cfi, DW_CFA_restore }, | |
715 | { "cfi_undefined", dot_cfi, DW_CFA_undefined }, | |
716 | { "cfi_same_value", dot_cfi, DW_CFA_same_value }, | |
717 | { "cfi_remember_state", dot_cfi, DW_CFA_remember_state }, | |
718 | { "cfi_restore_state", dot_cfi, DW_CFA_restore_state }, | |
6749011b | 719 | { "cfi_window_save", dot_cfi, DW_CFA_GNU_window_save }, |
e8dc9b5b | 720 | { "cfi_negate_ra_state", dot_cfi, DW_CFA_AARCH64_negate_ra_state }, |
cdfbf930 | 721 | { "cfi_escape", dot_cfi_escape, 0 }, |
63752a75 | 722 | { "cfi_signal_frame", dot_cfi, CFI_signal_frame }, |
9b8ae42e | 723 | { "cfi_personality", dot_cfi_personality, 0 }, |
2f0c68f2 | 724 | { "cfi_personality_id", dot_cfi_personality_id, 0 }, |
9b8ae42e | 725 | { "cfi_lsda", dot_cfi_lsda, 0 }, |
f1c4cc75 | 726 | { "cfi_val_encoded_addr", dot_cfi_val_encoded_addr, 0 }, |
2f0c68f2 | 727 | { "cfi_inline_lsda", dot_cfi_inline_lsda, 0 }, |
69602580 | 728 | { "cfi_label", dot_cfi_label, 0 }, |
084303b8 | 729 | { "cfi_val_offset", dot_cfi, DW_CFA_val_offset }, |
a4447b93 RH |
730 | { NULL, NULL, 0 } |
731 | }; | |
54cfded0 AM |
732 | |
733 | static void | |
a4447b93 | 734 | cfi_parse_separator (void) |
54cfded0 | 735 | { |
a4447b93 RH |
736 | SKIP_WHITESPACE (); |
737 | if (*input_line_pointer == ',') | |
738 | input_line_pointer++; | |
739 | else | |
740 | as_bad (_("missing separator")); | |
54cfded0 AM |
741 | } |
742 | ||
a60de03c JB |
743 | #ifndef tc_parse_to_dw2regnum |
744 | static void | |
72b016b4 | 745 | tc_parse_to_dw2regnum (expressionS *exp) |
54cfded0 | 746 | { |
a60de03c | 747 | # ifdef tc_regname_to_dw2regnum |
a4447b93 RH |
748 | SKIP_WHITESPACE (); |
749 | if (is_name_beginner (*input_line_pointer) | |
750 | || (*input_line_pointer == '%' | |
751 | && is_name_beginner (*++input_line_pointer))) | |
752 | { | |
753 | char *name, c; | |
754 | ||
d02603dc | 755 | c = get_symbol_name (& name); |
a4447b93 | 756 | |
a60de03c JB |
757 | exp->X_op = O_constant; |
758 | exp->X_add_number = tc_regname_to_dw2regnum (name); | |
54cfded0 | 759 | |
d02603dc | 760 | restore_line_pointer (c); |
a4447b93 | 761 | } |
a60de03c JB |
762 | else |
763 | # endif | |
764 | expression_and_evaluate (exp); | |
765 | } | |
a4447b93 RH |
766 | #endif |
767 | ||
a60de03c JB |
768 | static unsigned |
769 | cfi_parse_reg (void) | |
770 | { | |
771 | int regno; | |
772 | expressionS exp; | |
773 | ||
774 | tc_parse_to_dw2regnum (&exp); | |
a4447b93 | 775 | switch (exp.X_op) |
54cfded0 | 776 | { |
a4447b93 RH |
777 | case O_register: |
778 | case O_constant: | |
779 | regno = exp.X_add_number; | |
780 | break; | |
781 | ||
782 | default: | |
a60de03c JB |
783 | regno = -1; |
784 | break; | |
785 | } | |
786 | ||
787 | if (regno < 0) | |
788 | { | |
a4447b93 RH |
789 | as_bad (_("bad register expression")); |
790 | regno = 0; | |
54cfded0 AM |
791 | } |
792 | ||
a4447b93 RH |
793 | return regno; |
794 | } | |
795 | ||
796 | static offsetT | |
797 | cfi_parse_const (void) | |
798 | { | |
799 | return get_absolute_expression (); | |
54cfded0 AM |
800 | } |
801 | ||
802 | static void | |
a4447b93 | 803 | dot_cfi (int arg) |
54cfded0 | 804 | { |
a4447b93 RH |
805 | offsetT offset; |
806 | unsigned reg1, reg2; | |
54cfded0 | 807 | |
ae424f82 | 808 | if (frchain_now->frch_cfi_data == NULL) |
54cfded0 AM |
809 | { |
810 | as_bad (_("CFI instruction used without previous .cfi_startproc")); | |
7c9c8381 | 811 | ignore_rest_of_line (); |
54cfded0 AM |
812 | return; |
813 | } | |
814 | ||
a4447b93 | 815 | /* If the last address was not at the current PC, advance to current. */ |
ae424f82 | 816 | if (symbol_get_frag (frchain_now->frch_cfi_data->last_address) != frag_now |
9e1a8675 AM |
817 | || (S_GET_VALUE (frchain_now->frch_cfi_data->last_address) |
818 | != frag_now_fix ())) | |
a4447b93 | 819 | cfi_add_advance_loc (symbol_temp_new_now ()); |
54cfded0 AM |
820 | |
821 | switch (arg) | |
822 | { | |
a4447b93 | 823 | case DW_CFA_offset: |
a4447b93 RH |
824 | reg1 = cfi_parse_reg (); |
825 | cfi_parse_separator (); | |
826 | offset = cfi_parse_const (); | |
2be24b54 ML |
827 | cfi_add_CFA_offset (reg1, offset); |
828 | break; | |
a4447b93 | 829 | |
084303b8 AK |
830 | case DW_CFA_val_offset: |
831 | reg1 = cfi_parse_reg (); | |
832 | cfi_parse_separator (); | |
833 | offset = cfi_parse_const (); | |
834 | cfi_add_CFA_val_offset (reg1, offset); | |
835 | break; | |
836 | ||
fa87b337 RH |
837 | case CFI_rel_offset: |
838 | reg1 = cfi_parse_reg (); | |
839 | cfi_parse_separator (); | |
840 | offset = cfi_parse_const (); | |
ae424f82 JJ |
841 | cfi_add_CFA_offset (reg1, |
842 | offset - frchain_now->frch_cfi_data->cur_cfa_offset); | |
fa87b337 RH |
843 | break; |
844 | ||
2be24b54 ML |
845 | case DW_CFA_def_cfa: |
846 | reg1 = cfi_parse_reg (); | |
847 | cfi_parse_separator (); | |
848 | offset = cfi_parse_const (); | |
849 | cfi_add_CFA_def_cfa (reg1, offset); | |
54cfded0 AM |
850 | break; |
851 | ||
a4447b93 RH |
852 | case DW_CFA_register: |
853 | reg1 = cfi_parse_reg (); | |
854 | cfi_parse_separator (); | |
855 | reg2 = cfi_parse_reg (); | |
a4447b93 | 856 | cfi_add_CFA_register (reg1, reg2); |
39b82151 ML |
857 | break; |
858 | ||
a4447b93 RH |
859 | case DW_CFA_def_cfa_register: |
860 | reg1 = cfi_parse_reg (); | |
861 | cfi_add_CFA_def_cfa_register (reg1); | |
54cfded0 AM |
862 | break; |
863 | ||
a4447b93 RH |
864 | case DW_CFA_def_cfa_offset: |
865 | offset = cfi_parse_const (); | |
866 | cfi_add_CFA_def_cfa_offset (offset); | |
54cfded0 AM |
867 | break; |
868 | ||
54cfded0 | 869 | case CFI_adjust_cfa_offset: |
a4447b93 | 870 | offset = cfi_parse_const (); |
ae424f82 JJ |
871 | cfi_add_CFA_def_cfa_offset (frchain_now->frch_cfi_data->cur_cfa_offset |
872 | + offset); | |
54cfded0 AM |
873 | break; |
874 | ||
2be24b54 | 875 | case DW_CFA_restore: |
b57d375b JB |
876 | for (;;) |
877 | { | |
878 | reg1 = cfi_parse_reg (); | |
879 | cfi_add_CFA_restore (reg1); | |
880 | SKIP_WHITESPACE (); | |
881 | if (*input_line_pointer != ',') | |
882 | break; | |
883 | ++input_line_pointer; | |
884 | } | |
2be24b54 ML |
885 | break; |
886 | ||
887 | case DW_CFA_undefined: | |
b57d375b JB |
888 | for (;;) |
889 | { | |
890 | reg1 = cfi_parse_reg (); | |
891 | cfi_add_CFA_undefined (reg1); | |
892 | SKIP_WHITESPACE (); | |
893 | if (*input_line_pointer != ',') | |
894 | break; | |
895 | ++input_line_pointer; | |
896 | } | |
2be24b54 ML |
897 | break; |
898 | ||
899 | case DW_CFA_same_value: | |
900 | reg1 = cfi_parse_reg (); | |
901 | cfi_add_CFA_same_value (reg1); | |
902 | break; | |
903 | ||
904 | case CFI_return_column: | |
905 | reg1 = cfi_parse_reg (); | |
906 | cfi_set_return_column (reg1); | |
907 | break; | |
908 | ||
909 | case DW_CFA_remember_state: | |
910 | cfi_add_CFA_remember_state (); | |
911 | break; | |
912 | ||
913 | case DW_CFA_restore_state: | |
914 | cfi_add_CFA_restore_state (); | |
915 | break; | |
916 | ||
364b6d8b JJ |
917 | case DW_CFA_GNU_window_save: |
918 | cfi_add_CFA_insn (DW_CFA_GNU_window_save); | |
919 | break; | |
920 | ||
63752a75 | 921 | case CFI_signal_frame: |
ae424f82 | 922 | frchain_now->frch_cfi_data->cur_fde_data->signal_frame = 1; |
63752a75 JJ |
923 | break; |
924 | ||
54cfded0 | 925 | default: |
a4447b93 | 926 | abort (); |
54cfded0 | 927 | } |
54cfded0 | 928 | |
a4447b93 | 929 | demand_empty_rest_of_line (); |
54cfded0 AM |
930 | } |
931 | ||
cdfbf930 RH |
932 | static void |
933 | dot_cfi_escape (int ignored ATTRIBUTE_UNUSED) | |
934 | { | |
935 | struct cfi_escape_data *head, **tail, *e; | |
936 | struct cfi_insn_data *insn; | |
937 | ||
ae424f82 | 938 | if (frchain_now->frch_cfi_data == NULL) |
cdfbf930 RH |
939 | { |
940 | as_bad (_("CFI instruction used without previous .cfi_startproc")); | |
7c9c8381 | 941 | ignore_rest_of_line (); |
cdfbf930 RH |
942 | return; |
943 | } | |
944 | ||
945 | /* If the last address was not at the current PC, advance to current. */ | |
ae424f82 | 946 | if (symbol_get_frag (frchain_now->frch_cfi_data->last_address) != frag_now |
9e1a8675 AM |
947 | || (S_GET_VALUE (frchain_now->frch_cfi_data->last_address) |
948 | != frag_now_fix ())) | |
cdfbf930 RH |
949 | cfi_add_advance_loc (symbol_temp_new_now ()); |
950 | ||
951 | tail = &head; | |
952 | do | |
953 | { | |
add39d23 | 954 | e = XNEW (struct cfi_escape_data); |
cdfbf930 RH |
955 | do_parse_cons_expression (&e->exp, 1); |
956 | *tail = e; | |
957 | tail = &e->next; | |
958 | } | |
959 | while (*input_line_pointer++ == ','); | |
960 | *tail = NULL; | |
961 | ||
962 | insn = alloc_cfi_insn_data (); | |
963 | insn->insn = CFI_escape; | |
964 | insn->u.esc = head; | |
7c9c8381 JB |
965 | |
966 | --input_line_pointer; | |
967 | demand_empty_rest_of_line (); | |
cdfbf930 RH |
968 | } |
969 | ||
9b8ae42e JJ |
970 | static void |
971 | dot_cfi_personality (int ignored ATTRIBUTE_UNUSED) | |
972 | { | |
973 | struct fde_entry *fde; | |
974 | offsetT encoding; | |
975 | ||
976 | if (frchain_now->frch_cfi_data == NULL) | |
977 | { | |
978 | as_bad (_("CFI instruction used without previous .cfi_startproc")); | |
979 | ignore_rest_of_line (); | |
980 | return; | |
981 | } | |
982 | ||
983 | fde = frchain_now->frch_cfi_data->cur_fde_data; | |
f1c4cc75 | 984 | encoding = cfi_parse_const (); |
9b8ae42e JJ |
985 | if (encoding == DW_EH_PE_omit) |
986 | { | |
987 | demand_empty_rest_of_line (); | |
988 | fde->per_encoding = encoding; | |
989 | return; | |
990 | } | |
991 | ||
992 | if ((encoding & 0xff) != encoding | |
2f0c68f2 | 993 | || ((((encoding & 0x70) != 0 |
3dd24306 | 994 | #if CFI_DIFF_EXPR_OK || defined tc_cfi_emit_pcrel_expr |
9e1a8675 | 995 | && (encoding & 0x70) != DW_EH_PE_pcrel |
9b8ae42e | 996 | #endif |
9e1a8675 AM |
997 | ) |
998 | /* leb128 can be handled, but does something actually need it? */ | |
2f0c68f2 CM |
999 | || (encoding & 7) == DW_EH_PE_uleb128 |
1000 | || (encoding & 7) > DW_EH_PE_udata8) | |
9e1a8675 | 1001 | && tc_cfi_reloc_for_encoding (encoding) == BFD_RELOC_NONE)) |
9b8ae42e JJ |
1002 | { |
1003 | as_bad (_("invalid or unsupported encoding in .cfi_personality")); | |
1004 | ignore_rest_of_line (); | |
1005 | return; | |
1006 | } | |
1007 | ||
1008 | if (*input_line_pointer++ != ',') | |
1009 | { | |
1010 | as_bad (_(".cfi_personality requires encoding and symbol arguments")); | |
1011 | ignore_rest_of_line (); | |
1012 | return; | |
1013 | } | |
1014 | ||
1015 | expression_and_evaluate (&fde->personality); | |
1016 | switch (fde->personality.X_op) | |
1017 | { | |
1018 | case O_symbol: | |
1019 | break; | |
1020 | case O_constant: | |
1021 | if ((encoding & 0x70) == DW_EH_PE_pcrel) | |
1022 | encoding = DW_EH_PE_omit; | |
1023 | break; | |
1024 | default: | |
1025 | encoding = DW_EH_PE_omit; | |
1026 | break; | |
1027 | } | |
1028 | ||
1029 | fde->per_encoding = encoding; | |
1030 | ||
1031 | if (encoding == DW_EH_PE_omit) | |
1032 | { | |
1033 | as_bad (_("wrong second argument to .cfi_personality")); | |
1034 | ignore_rest_of_line (); | |
1035 | return; | |
1036 | } | |
1037 | ||
1038 | demand_empty_rest_of_line (); | |
1039 | } | |
1040 | ||
1041 | static void | |
1042 | dot_cfi_lsda (int ignored ATTRIBUTE_UNUSED) | |
1043 | { | |
1044 | struct fde_entry *fde; | |
1045 | offsetT encoding; | |
1046 | ||
1047 | if (frchain_now->frch_cfi_data == NULL) | |
1048 | { | |
1049 | as_bad (_("CFI instruction used without previous .cfi_startproc")); | |
1050 | ignore_rest_of_line (); | |
1051 | return; | |
1052 | } | |
1053 | ||
1054 | fde = frchain_now->frch_cfi_data->cur_fde_data; | |
f1c4cc75 | 1055 | encoding = cfi_parse_const (); |
9b8ae42e JJ |
1056 | if (encoding == DW_EH_PE_omit) |
1057 | { | |
1058 | demand_empty_rest_of_line (); | |
1059 | fde->lsda_encoding = encoding; | |
1060 | return; | |
1061 | } | |
1062 | ||
1063 | if ((encoding & 0xff) != encoding | |
2f0c68f2 | 1064 | || ((((encoding & 0x70) != 0 |
2c678708 | 1065 | #if CFI_DIFF_LSDA_OK || defined tc_cfi_emit_pcrel_expr |
2f0c68f2 | 1066 | && (encoding & 0x70) != DW_EH_PE_pcrel |
9b8ae42e | 1067 | #endif |
9e1a8675 AM |
1068 | ) |
1069 | /* leb128 can be handled, but does something actually need it? */ | |
2f0c68f2 CM |
1070 | || (encoding & 7) == DW_EH_PE_uleb128 |
1071 | || (encoding & 7) > DW_EH_PE_udata8) | |
1072 | && tc_cfi_reloc_for_encoding (encoding) == BFD_RELOC_NONE)) | |
9b8ae42e JJ |
1073 | { |
1074 | as_bad (_("invalid or unsupported encoding in .cfi_lsda")); | |
1075 | ignore_rest_of_line (); | |
1076 | return; | |
1077 | } | |
1078 | ||
1079 | if (*input_line_pointer++ != ',') | |
1080 | { | |
1081 | as_bad (_(".cfi_lsda requires encoding and symbol arguments")); | |
1082 | ignore_rest_of_line (); | |
1083 | return; | |
1084 | } | |
1085 | ||
1086 | fde->lsda_encoding = encoding; | |
1087 | ||
1088 | expression_and_evaluate (&fde->lsda); | |
1089 | switch (fde->lsda.X_op) | |
1090 | { | |
1091 | case O_symbol: | |
1092 | break; | |
1093 | case O_constant: | |
1094 | if ((encoding & 0x70) == DW_EH_PE_pcrel) | |
1095 | encoding = DW_EH_PE_omit; | |
1096 | break; | |
1097 | default: | |
1098 | encoding = DW_EH_PE_omit; | |
1099 | break; | |
1100 | } | |
1101 | ||
1102 | fde->lsda_encoding = encoding; | |
1103 | ||
1104 | if (encoding == DW_EH_PE_omit) | |
1105 | { | |
1106 | as_bad (_("wrong second argument to .cfi_lsda")); | |
1107 | ignore_rest_of_line (); | |
1108 | return; | |
1109 | } | |
1110 | ||
1111 | demand_empty_rest_of_line (); | |
1112 | } | |
1113 | ||
f1c4cc75 RH |
1114 | static void |
1115 | dot_cfi_val_encoded_addr (int ignored ATTRIBUTE_UNUSED) | |
1116 | { | |
1117 | struct cfi_insn_data *insn_ptr; | |
1118 | offsetT encoding; | |
1119 | ||
1120 | if (frchain_now->frch_cfi_data == NULL) | |
1121 | { | |
1122 | as_bad (_("CFI instruction used without previous .cfi_startproc")); | |
1123 | ignore_rest_of_line (); | |
1124 | return; | |
1125 | } | |
1126 | ||
1127 | /* If the last address was not at the current PC, advance to current. */ | |
1128 | if (symbol_get_frag (frchain_now->frch_cfi_data->last_address) != frag_now | |
9e1a8675 AM |
1129 | || (S_GET_VALUE (frchain_now->frch_cfi_data->last_address) |
1130 | != frag_now_fix ())) | |
f1c4cc75 RH |
1131 | cfi_add_advance_loc (symbol_temp_new_now ()); |
1132 | ||
1133 | insn_ptr = alloc_cfi_insn_data (); | |
1134 | insn_ptr->insn = CFI_val_encoded_addr; | |
72b016b4 | 1135 | |
f1c4cc75 RH |
1136 | insn_ptr->u.ea.reg = cfi_parse_reg (); |
1137 | ||
1138 | cfi_parse_separator (); | |
1139 | encoding = cfi_parse_const (); | |
1140 | if ((encoding & 0xff) != encoding | |
1141 | || ((encoding & 0x70) != 0 | |
1142 | #if CFI_DIFF_EXPR_OK || defined tc_cfi_emit_pcrel_expr | |
1143 | && (encoding & 0x70) != DW_EH_PE_pcrel | |
1144 | #endif | |
1145 | ) | |
9e1a8675 | 1146 | /* leb128 can be handled, but does something actually need it? */ |
f1c4cc75 RH |
1147 | || (encoding & 7) == DW_EH_PE_uleb128 |
1148 | || (encoding & 7) > DW_EH_PE_udata8) | |
1149 | { | |
1150 | as_bad (_("invalid or unsupported encoding in .cfi_lsda")); | |
1151 | encoding = DW_EH_PE_omit; | |
1152 | } | |
1153 | ||
1154 | cfi_parse_separator (); | |
1155 | expression_and_evaluate (&insn_ptr->u.ea.exp); | |
1156 | switch (insn_ptr->u.ea.exp.X_op) | |
1157 | { | |
1158 | case O_symbol: | |
1159 | break; | |
1160 | case O_constant: | |
1161 | if ((encoding & 0x70) != DW_EH_PE_pcrel) | |
83e12deb | 1162 | break; |
1a0670f3 | 1163 | /* Fall through. */ |
f1c4cc75 RH |
1164 | default: |
1165 | encoding = DW_EH_PE_omit; | |
1166 | break; | |
1167 | } | |
1168 | ||
1169 | insn_ptr->u.ea.encoding = encoding; | |
1170 | if (encoding == DW_EH_PE_omit) | |
1171 | { | |
1172 | as_bad (_("wrong third argument to .cfi_val_encoded_addr")); | |
1173 | ignore_rest_of_line (); | |
1174 | return; | |
1175 | } | |
1176 | ||
1177 | demand_empty_rest_of_line (); | |
1178 | } | |
1179 | ||
69602580 JB |
1180 | static void |
1181 | dot_cfi_label (int ignored ATTRIBUTE_UNUSED) | |
1182 | { | |
314a80c4 | 1183 | char *name; |
1184 | ||
1185 | if (frchain_now->frch_cfi_data == NULL) | |
1186 | { | |
1187 | as_bad (_("CFI instruction used without previous .cfi_startproc")); | |
1188 | ignore_rest_of_line (); | |
1189 | return; | |
1190 | } | |
69602580 | 1191 | |
314a80c4 | 1192 | name = read_symbol_name (); |
69602580 JB |
1193 | if (name == NULL) |
1194 | return; | |
1195 | ||
1196 | /* If the last address was not at the current PC, advance to current. */ | |
1197 | if (symbol_get_frag (frchain_now->frch_cfi_data->last_address) != frag_now | |
9e1a8675 AM |
1198 | || (S_GET_VALUE (frchain_now->frch_cfi_data->last_address) |
1199 | != frag_now_fix ())) | |
69602580 JB |
1200 | cfi_add_advance_loc (symbol_temp_new_now ()); |
1201 | ||
1202 | cfi_add_label (name); | |
92e18d93 | 1203 | free (name); |
69602580 JB |
1204 | |
1205 | demand_empty_rest_of_line (); | |
1206 | } | |
1207 | ||
2cea9515 | 1208 | void |
38462edf JJ |
1209 | dot_cfi_sections (int ignored ATTRIBUTE_UNUSED) |
1210 | { | |
1211 | int sections = 0; | |
1212 | ||
1213 | SKIP_WHITESPACE (); | |
d02603dc | 1214 | if (is_name_beginner (*input_line_pointer) || *input_line_pointer == '"') |
38462edf JJ |
1215 | while (1) |
1216 | { | |
d02603dc | 1217 | char * saved_ilp; |
38462edf JJ |
1218 | char *name, c; |
1219 | ||
d02603dc NC |
1220 | saved_ilp = input_line_pointer; |
1221 | c = get_symbol_name (& name); | |
38462edf | 1222 | |
d34049e8 | 1223 | if (startswith (name, ".eh_frame") |
72b016b4 | 1224 | && name[9] != '_') |
38462edf | 1225 | sections |= CFI_EMIT_eh_frame; |
d34049e8 | 1226 | else if (startswith (name, ".debug_frame")) |
38462edf | 1227 | sections |= CFI_EMIT_debug_frame; |
2f0c68f2 | 1228 | #if SUPPORT_COMPACT_EH |
d34049e8 | 1229 | else if (startswith (name, ".eh_frame_entry")) |
2f0c68f2 | 1230 | { |
5b7c81bd | 1231 | compact_eh = true; |
2f0c68f2 CM |
1232 | sections |= CFI_EMIT_eh_frame_compact; |
1233 | } | |
1234 | #endif | |
1bce6bd8 PB |
1235 | #ifdef tc_cfi_section_name |
1236 | else if (strcmp (name, tc_cfi_section_name) == 0) | |
1237 | sections |= CFI_EMIT_target; | |
1238 | #endif | |
b52c4ee4 IB |
1239 | else if (startswith (name, ".sframe")) |
1240 | sections |= CFI_EMIT_sframe; | |
38462edf JJ |
1241 | else |
1242 | { | |
1243 | *input_line_pointer = c; | |
d02603dc | 1244 | input_line_pointer = saved_ilp; |
38462edf JJ |
1245 | break; |
1246 | } | |
1247 | ||
1248 | *input_line_pointer = c; | |
d02603dc | 1249 | SKIP_WHITESPACE_AFTER_NAME (); |
38462edf JJ |
1250 | if (*input_line_pointer == ',') |
1251 | { | |
1252 | name = input_line_pointer++; | |
1253 | SKIP_WHITESPACE (); | |
9e1a8675 AM |
1254 | if (!is_name_beginner (*input_line_pointer) |
1255 | && *input_line_pointer != '"') | |
38462edf JJ |
1256 | { |
1257 | input_line_pointer = name; | |
1258 | break; | |
1259 | } | |
1260 | } | |
9e1a8675 AM |
1261 | else if (is_name_beginner (*input_line_pointer) |
1262 | || *input_line_pointer == '"') | |
38462edf JJ |
1263 | break; |
1264 | } | |
1265 | ||
1266 | demand_empty_rest_of_line (); | |
3d3424e9 MF |
1267 | if (cfi_sections_set |
1268 | && (sections & (CFI_EMIT_eh_frame | CFI_EMIT_eh_frame_compact)) | |
9e1a8675 AM |
1269 | && ((cfi_sections & (CFI_EMIT_eh_frame | CFI_EMIT_eh_frame_compact)) |
1270 | != (sections & (CFI_EMIT_eh_frame | CFI_EMIT_eh_frame_compact)))) | |
2f0c68f2 | 1271 | as_bad (_("inconsistent uses of .cfi_sections")); |
38462edf JJ |
1272 | cfi_sections = sections; |
1273 | } | |
1274 | ||
54cfded0 | 1275 | static void |
a4447b93 | 1276 | dot_cfi_startproc (int ignored ATTRIBUTE_UNUSED) |
54cfded0 | 1277 | { |
a4447b93 | 1278 | int simple = 0; |
39b82151 | 1279 | |
ae424f82 | 1280 | if (frchain_now->frch_cfi_data != NULL) |
54cfded0 AM |
1281 | { |
1282 | as_bad (_("previous CFI entry not closed (missing .cfi_endproc)")); | |
7c9c8381 | 1283 | ignore_rest_of_line (); |
54cfded0 AM |
1284 | return; |
1285 | } | |
1286 | ||
a4447b93 | 1287 | cfi_new_fde (symbol_temp_new_now ()); |
39b82151 | 1288 | |
a4447b93 | 1289 | SKIP_WHITESPACE (); |
d02603dc | 1290 | if (is_name_beginner (*input_line_pointer) || *input_line_pointer == '"') |
a4447b93 | 1291 | { |
d02603dc | 1292 | char * saved_ilp = input_line_pointer; |
a4447b93 | 1293 | char *name, c; |
54cfded0 | 1294 | |
d02603dc | 1295 | c = get_symbol_name (& name); |
54cfded0 | 1296 | |
a4447b93 RH |
1297 | if (strcmp (name, "simple") == 0) |
1298 | { | |
1299 | simple = 1; | |
d02603dc | 1300 | restore_line_pointer (c); |
a4447b93 RH |
1301 | } |
1302 | else | |
d02603dc | 1303 | input_line_pointer = saved_ilp; |
a4447b93 RH |
1304 | } |
1305 | demand_empty_rest_of_line (); | |
1306 | ||
2f0c68f2 | 1307 | cfi_set_sections (); |
b0cd3f29 | 1308 | |
ae424f82 | 1309 | frchain_now->frch_cfi_data->cur_cfa_offset = 0; |
a4447b93 | 1310 | if (!simple) |
39b82151 | 1311 | tc_cfi_frame_initial_instructions (); |
1bce6bd8 | 1312 | |
71a17ca2 | 1313 | if ((all_cfi_sections & CFI_EMIT_target) != 0) |
1bce6bd8 | 1314 | tc_cfi_startproc (); |
54cfded0 AM |
1315 | } |
1316 | ||
a4447b93 RH |
1317 | static void |
1318 | dot_cfi_endproc (int ignored ATTRIBUTE_UNUSED) | |
1319 | { | |
ae424f82 | 1320 | if (frchain_now->frch_cfi_data == NULL) |
a4447b93 RH |
1321 | { |
1322 | as_bad (_(".cfi_endproc without corresponding .cfi_startproc")); | |
7c9c8381 | 1323 | ignore_rest_of_line (); |
a4447b93 RH |
1324 | return; |
1325 | } | |
54cfded0 | 1326 | |
040622a7 | 1327 | cfi_set_last_fde (frchain_now->frch_cfi_data->cur_fde_data); |
1bce6bd8 | 1328 | |
a4447b93 | 1329 | cfi_end_fde (symbol_temp_new_now ()); |
7c9c8381 JB |
1330 | |
1331 | demand_empty_rest_of_line (); | |
1bce6bd8 | 1332 | |
71a17ca2 | 1333 | if ((all_cfi_sections & CFI_EMIT_target) != 0) |
2f0c68f2 | 1334 | tc_cfi_endproc (last_fde); |
a4447b93 | 1335 | } |
39b82151 | 1336 | |
2f0c68f2 CM |
1337 | static segT |
1338 | get_cfi_seg (segT cseg, const char *base, flagword flags, int align) | |
54cfded0 | 1339 | { |
2f0c68f2 | 1340 | /* Exclude .debug_frame sections for Compact EH. */ |
853ba678 J |
1341 | if (SUPPORT_FRAME_LINKONCE || ((flags & SEC_DEBUGGING) == 0 && compact_eh) |
1342 | || ((flags & SEC_DEBUGGING) == 0 && TARGET_MULTIPLE_EH_FRAME_SECTIONS)) | |
2f0c68f2 | 1343 | { |
853ba678 | 1344 | segT iseg = cseg; |
2f0c68f2 CM |
1345 | struct dwcfi_seg_list *l; |
1346 | ||
1347 | l = dwcfi_hash_find_or_make (cseg, base, flags); | |
1348 | ||
1349 | cseg = l->seg; | |
1350 | subseg_set (cseg, l->subseg); | |
853ba678 J |
1351 | |
1352 | if (TARGET_MULTIPLE_EH_FRAME_SECTIONS | |
1353 | && (flags & DWARF2_EH_FRAME_READ_ONLY)) | |
1354 | { | |
1355 | const frchainS *ifrch = seg_info (iseg)->frchainP; | |
1356 | const frchainS *frch = seg_info (cseg)->frchainP; | |
1357 | expressionS exp; | |
1358 | ||
1359 | exp.X_op = O_symbol; | |
1360 | exp.X_add_symbol = (symbolS *) local_symbol_make (cseg->name, cseg, frch->frch_root, 0); | |
1361 | exp.X_add_number = 0; | |
1362 | subseg_set (iseg, ifrch->frch_subseg); | |
1363 | fix_new_exp (ifrch->frch_root, 0, 0, &exp, 0, BFD_RELOC_NONE); | |
1364 | ||
1365 | /* Restore the original segment info. */ | |
1366 | subseg_set (cseg, l->subseg); | |
1367 | } | |
2f0c68f2 CM |
1368 | } |
1369 | else | |
1370 | { | |
1371 | cseg = subseg_new (base, 0); | |
fd361982 | 1372 | bfd_set_section_flags (cseg, flags); |
2f0c68f2 CM |
1373 | } |
1374 | record_alignment (cseg, align); | |
1375 | return cseg; | |
a4447b93 | 1376 | } |
54cfded0 | 1377 | |
2f0c68f2 CM |
1378 | #if SUPPORT_COMPACT_EH |
1379 | static void | |
1380 | dot_cfi_personality_id (int ignored ATTRIBUTE_UNUSED) | |
1381 | { | |
1382 | struct fde_entry *fde; | |
54cfded0 | 1383 | |
2f0c68f2 CM |
1384 | if (frchain_now->frch_cfi_data == NULL) |
1385 | { | |
1386 | as_bad (_("CFI instruction used without previous .cfi_startproc")); | |
1387 | ignore_rest_of_line (); | |
1388 | return; | |
1389 | } | |
1390 | ||
1391 | fde = frchain_now->frch_cfi_data->cur_fde_data; | |
1392 | fde->personality_id = cfi_parse_const (); | |
1393 | demand_empty_rest_of_line (); | |
1394 | ||
1395 | if (fde->personality_id == 0 || fde->personality_id > 3) | |
1396 | { | |
1397 | as_bad (_("wrong argument to .cfi_personality_id")); | |
1398 | return; | |
1399 | } | |
1400 | } | |
1401 | ||
1402 | static void | |
1403 | dot_cfi_fde_data (int ignored ATTRIBUTE_UNUSED) | |
a4447b93 | 1404 | { |
2f0c68f2 CM |
1405 | if (frchain_now->frch_cfi_data == NULL) |
1406 | { | |
1407 | as_bad (_(".cfi_fde_data without corresponding .cfi_startproc")); | |
1408 | ignore_rest_of_line (); | |
1409 | return; | |
1410 | } | |
1411 | ||
040622a7 | 1412 | cfi_set_last_fde (frchain_now->frch_cfi_data->cur_fde_data); |
2f0c68f2 | 1413 | |
71a17ca2 IB |
1414 | if ((all_cfi_sections & CFI_EMIT_target) != 0 |
1415 | || (all_cfi_sections & CFI_EMIT_eh_frame_compact) != 0) | |
2f0c68f2 CM |
1416 | { |
1417 | struct cfi_escape_data *head, **tail, *e; | |
1418 | int num_ops = 0; | |
1419 | ||
1420 | tail = &head; | |
1421 | if (!is_it_end_of_statement ()) | |
1422 | { | |
1423 | num_ops = 0; | |
1424 | do | |
1425 | { | |
add39d23 | 1426 | e = XNEW (struct cfi_escape_data); |
2f0c68f2 CM |
1427 | do_parse_cons_expression (&e->exp, 1); |
1428 | *tail = e; | |
1429 | tail = &e->next; | |
1430 | num_ops++; | |
1431 | } | |
1432 | while (*input_line_pointer++ == ','); | |
1433 | --input_line_pointer; | |
1434 | } | |
1435 | *tail = NULL; | |
1436 | ||
1437 | if (last_fde->lsda_encoding != DW_EH_PE_omit) | |
1438 | last_fde->eh_header_type = EH_COMPACT_HAS_LSDA; | |
1439 | else if (num_ops <= 3 && last_fde->per_encoding == DW_EH_PE_omit) | |
1440 | last_fde->eh_header_type = EH_COMPACT_INLINE; | |
1441 | else | |
1442 | last_fde->eh_header_type = EH_COMPACT_OUTLINE; | |
1443 | ||
1444 | if (last_fde->eh_header_type == EH_COMPACT_INLINE) | |
1445 | num_ops = 3; | |
1446 | ||
1447 | last_fde->eh_data_size = num_ops; | |
add39d23 | 1448 | last_fde->eh_data = XNEWVEC (bfd_byte, num_ops); |
2f0c68f2 CM |
1449 | num_ops = 0; |
1450 | while (head) | |
1451 | { | |
1452 | e = head; | |
1453 | head = e->next; | |
1454 | last_fde->eh_data[num_ops++] = e->exp.X_add_number; | |
1455 | free (e); | |
1456 | } | |
1457 | if (last_fde->eh_header_type == EH_COMPACT_INLINE) | |
1458 | while (num_ops < 3) | |
1459 | last_fde->eh_data[num_ops++] = tc_compact_eh_opcode_stop; | |
1460 | } | |
1461 | ||
1462 | demand_empty_rest_of_line (); | |
a4447b93 | 1463 | } |
54cfded0 | 1464 | |
2f0c68f2 CM |
1465 | /* Function to emit the compact unwinding opcodes stored in the |
1466 | fde's eh_data field. The end of the opcode data will be | |
1467 | padded to the value in align. */ | |
54cfded0 | 1468 | |
2f0c68f2 CM |
1469 | static void |
1470 | output_compact_unwind_data (struct fde_entry *fde, int align) | |
a4447b93 | 1471 | { |
2f0c68f2 CM |
1472 | int data_size = fde->eh_data_size + 2; |
1473 | int align_padding; | |
1474 | int amask; | |
1475 | char *p; | |
1476 | ||
1477 | fde->eh_loc = symbol_temp_new_now (); | |
1478 | ||
1479 | p = frag_more (1); | |
1480 | if (fde->personality_id != 0) | |
1481 | *p = fde->personality_id; | |
1482 | else if (fde->per_encoding != DW_EH_PE_omit) | |
1483 | { | |
1484 | *p = 0; | |
5b7c81bd | 1485 | emit_expr_encoded (&fde->personality, fde->per_encoding, false); |
2f0c68f2 CM |
1486 | data_size += encoding_size (fde->per_encoding); |
1487 | } | |
1488 | else | |
1489 | *p = 1; | |
1490 | ||
1491 | amask = (1 << align) - 1; | |
1492 | align_padding = ((data_size + amask) & ~amask) - data_size; | |
1493 | ||
1494 | p = frag_more (fde->eh_data_size + 1 + align_padding); | |
1495 | memcpy (p, fde->eh_data, fde->eh_data_size); | |
1496 | p += fde->eh_data_size; | |
1497 | ||
1498 | while (align_padding-- > 0) | |
1499 | *(p++) = tc_compact_eh_opcode_pad; | |
1500 | ||
1501 | *(p++) = tc_compact_eh_opcode_stop; | |
1502 | fde->eh_header_type = EH_COMPACT_OUTLINE_DONE; | |
a4447b93 RH |
1503 | } |
1504 | ||
2f0c68f2 CM |
1505 | /* Handle the .cfi_inline_lsda directive. */ |
1506 | static void | |
1507 | dot_cfi_inline_lsda (int ignored ATTRIBUTE_UNUSED) | |
1508 | { | |
1509 | segT ccseg; | |
1510 | int align; | |
1511 | long max_alignment = 28; | |
1512 | ||
1513 | if (!last_fde) | |
1514 | { | |
1515 | as_bad (_("unexpected .cfi_inline_lsda")); | |
1516 | ignore_rest_of_line (); | |
1517 | return; | |
1518 | } | |
1519 | ||
1520 | if ((last_fde->sections & CFI_EMIT_eh_frame_compact) == 0) | |
1521 | { | |
1522 | as_bad (_(".cfi_inline_lsda not valid for this frame")); | |
1523 | ignore_rest_of_line (); | |
1524 | return; | |
1525 | } | |
1526 | ||
1527 | if (last_fde->eh_header_type != EH_COMPACT_UNKNOWN | |
1528 | && last_fde->eh_header_type != EH_COMPACT_HAS_LSDA) | |
1529 | { | |
1530 | as_bad (_(".cfi_inline_lsda seen for frame without .cfi_lsda")); | |
1531 | ignore_rest_of_line (); | |
1532 | return; | |
1533 | } | |
1534 | ||
1535 | #ifdef md_flush_pending_output | |
1536 | md_flush_pending_output (); | |
1537 | #endif | |
1538 | ||
1539 | align = get_absolute_expression (); | |
1540 | if (align > max_alignment) | |
1541 | { | |
1542 | align = max_alignment; | |
1543 | as_bad (_("Alignment too large: %d. assumed."), align); | |
1544 | } | |
1545 | else if (align < 0) | |
1546 | { | |
1547 | as_warn (_("Alignment negative: 0 assumed.")); | |
1548 | align = 0; | |
1549 | } | |
1550 | ||
1551 | demand_empty_rest_of_line (); | |
1552 | ccseg = CUR_SEG (last_fde); | |
54cfded0 | 1553 | |
2f0c68f2 CM |
1554 | /* Open .gnu_extab section. */ |
1555 | get_cfi_seg (ccseg, ".gnu_extab", | |
1556 | (SEC_ALLOC | SEC_LOAD | SEC_DATA | |
1557 | | DWARF2_EH_FRAME_READ_ONLY), | |
1558 | 1); | |
1559 | ||
1560 | frag_align (align, 0, 0); | |
1561 | record_alignment (now_seg, align); | |
1562 | if (last_fde->eh_header_type == EH_COMPACT_HAS_LSDA) | |
1563 | output_compact_unwind_data (last_fde, align); | |
1564 | ||
040622a7 | 1565 | cfi_set_last_fde (NULL); |
2f0c68f2 CM |
1566 | |
1567 | return; | |
1568 | } | |
1569 | #else /* !SUPPORT_COMPACT_EH */ | |
a4447b93 | 1570 | static void |
2f0c68f2 | 1571 | dot_cfi_inline_lsda (int ignored ATTRIBUTE_UNUSED) |
a4447b93 | 1572 | { |
2f0c68f2 CM |
1573 | as_bad (_(".cfi_inline_lsda is not supported for this target")); |
1574 | ignore_rest_of_line (); | |
54cfded0 AM |
1575 | } |
1576 | ||
a4447b93 | 1577 | static void |
2f0c68f2 | 1578 | dot_cfi_fde_data (int ignored ATTRIBUTE_UNUSED) |
54cfded0 | 1579 | { |
2f0c68f2 CM |
1580 | as_bad (_(".cfi_fde_data is not supported for this target")); |
1581 | ignore_rest_of_line (); | |
a4447b93 | 1582 | } |
54cfded0 | 1583 | |
2f0c68f2 CM |
1584 | static void |
1585 | dot_cfi_personality_id (int ignored ATTRIBUTE_UNUSED) | |
1586 | { | |
1587 | as_bad (_(".cfi_personality_id is not supported for this target")); | |
1588 | ignore_rest_of_line (); | |
1589 | } | |
1590 | #endif | |
1591 | \f | |
a4447b93 RH |
1592 | static void |
1593 | output_cfi_insn (struct cfi_insn_data *insn) | |
1594 | { | |
1595 | offsetT offset; | |
1596 | unsigned int regno; | |
54cfded0 | 1597 | |
a4447b93 | 1598 | switch (insn->insn) |
54cfded0 | 1599 | { |
a4447b93 RH |
1600 | case DW_CFA_advance_loc: |
1601 | { | |
1602 | symbolS *from = insn->u.ll.lab1; | |
1603 | symbolS *to = insn->u.ll.lab2; | |
1604 | ||
1605 | if (symbol_get_frag (to) == symbol_get_frag (from)) | |
1606 | { | |
1607 | addressT delta = S_GET_VALUE (to) - S_GET_VALUE (from); | |
1608 | addressT scaled = delta / DWARF2_LINE_MIN_INSN_LENGTH; | |
1609 | ||
6f69abb0 AM |
1610 | if (scaled == 0) |
1611 | ; | |
1612 | else if (scaled <= 0x3F) | |
a4447b93 | 1613 | out_one (DW_CFA_advance_loc + scaled); |
395e8345 | 1614 | else if (scaled <= 0xFF) |
a4447b93 | 1615 | { |
9b8ae42e | 1616 | out_one (DW_CFA_advance_loc1); |
395e8345 | 1617 | out_one (scaled); |
a4447b93 | 1618 | } |
395e8345 | 1619 | else if (scaled <= 0xFFFF) |
a4447b93 | 1620 | { |
9b8ae42e | 1621 | out_one (DW_CFA_advance_loc2); |
395e8345 | 1622 | out_two (scaled); |
a4447b93 RH |
1623 | } |
1624 | else | |
1625 | { | |
9b8ae42e | 1626 | out_one (DW_CFA_advance_loc4); |
395e8345 | 1627 | out_four (scaled); |
a4447b93 RH |
1628 | } |
1629 | } | |
1630 | else | |
1631 | { | |
1632 | expressionS exp; | |
1633 | ||
1634 | exp.X_op = O_subtract; | |
1635 | exp.X_add_symbol = to; | |
1636 | exp.X_op_symbol = from; | |
1637 | exp.X_add_number = 0; | |
1638 | ||
1639 | /* The code in ehopt.c expects that one byte of the encoding | |
1640 | is already allocated to the frag. This comes from the way | |
1641 | that it scans the .eh_frame section looking first for the | |
b9d8f560 AM |
1642 | .byte DW_CFA_advance_loc4. Call frag_grow with the sum of |
1643 | room needed by frag_more and frag_var to preallocate space | |
1644 | ensuring that the DW_CFA_advance_loc4 is in the fixed part | |
1645 | of the rs_cfa frag, so that the relax machinery can remove | |
1646 | the advance_loc should it advance by zero. */ | |
1647 | frag_grow (5); | |
1fbfe785 | 1648 | *frag_more (1) = DW_CFA_advance_loc4; |
a4447b93 RH |
1649 | |
1650 | frag_var (rs_cfa, 4, 0, DWARF2_LINE_MIN_INSN_LENGTH << 3, | |
1651 | make_expr_symbol (&exp), frag_now_fix () - 1, | |
1652 | (char *) frag_now); | |
1653 | } | |
1654 | } | |
1655 | break; | |
1656 | ||
1657 | case DW_CFA_def_cfa: | |
1658 | offset = insn->u.ri.offset; | |
1659 | if (offset < 0) | |
54cfded0 | 1660 | { |
a4447b93 RH |
1661 | out_one (DW_CFA_def_cfa_sf); |
1662 | out_uleb128 (insn->u.ri.reg); | |
dcb45a06 | 1663 | out_sleb128 (offset / DWARF2_CIE_DATA_ALIGNMENT); |
54cfded0 AM |
1664 | } |
1665 | else | |
1666 | { | |
a4447b93 RH |
1667 | out_one (DW_CFA_def_cfa); |
1668 | out_uleb128 (insn->u.ri.reg); | |
1669 | out_uleb128 (offset); | |
54cfded0 AM |
1670 | } |
1671 | break; | |
1672 | ||
a4447b93 | 1673 | case DW_CFA_def_cfa_register: |
2be24b54 ML |
1674 | case DW_CFA_undefined: |
1675 | case DW_CFA_same_value: | |
1676 | out_one (insn->insn); | |
1677 | out_uleb128 (insn->u.r); | |
54cfded0 AM |
1678 | break; |
1679 | ||
a4447b93 RH |
1680 | case DW_CFA_def_cfa_offset: |
1681 | offset = insn->u.i; | |
1682 | if (offset < 0) | |
1683 | { | |
1684 | out_one (DW_CFA_def_cfa_offset_sf); | |
dcb45a06 | 1685 | out_sleb128 (offset / DWARF2_CIE_DATA_ALIGNMENT); |
a4447b93 RH |
1686 | } |
1687 | else | |
1688 | { | |
1689 | out_one (DW_CFA_def_cfa_offset); | |
1690 | out_uleb128 (offset); | |
1691 | } | |
54cfded0 AM |
1692 | break; |
1693 | ||
2be24b54 ML |
1694 | case DW_CFA_restore: |
1695 | regno = insn->u.r; | |
1696 | if (regno <= 0x3F) | |
1697 | { | |
1698 | out_one (DW_CFA_restore + regno); | |
1699 | } | |
1700 | else | |
1701 | { | |
1702 | out_one (DW_CFA_restore_extended); | |
1703 | out_uleb128 (regno); | |
1704 | } | |
1705 | break; | |
1706 | ||
a4447b93 RH |
1707 | case DW_CFA_offset: |
1708 | regno = insn->u.ri.reg; | |
1709 | offset = insn->u.ri.offset / DWARF2_CIE_DATA_ALIGNMENT; | |
1710 | if (offset < 0) | |
1711 | { | |
1233ae62 | 1712 | out_one (DW_CFA_offset_extended_sf); |
a4447b93 RH |
1713 | out_uleb128 (regno); |
1714 | out_sleb128 (offset); | |
1715 | } | |
1716 | else if (regno <= 0x3F) | |
1717 | { | |
1718 | out_one (DW_CFA_offset + regno); | |
1719 | out_uleb128 (offset); | |
1720 | } | |
54cfded0 AM |
1721 | else |
1722 | { | |
a4447b93 RH |
1723 | out_one (DW_CFA_offset_extended); |
1724 | out_uleb128 (regno); | |
1725 | out_uleb128 (offset); | |
54cfded0 | 1726 | } |
54cfded0 AM |
1727 | break; |
1728 | ||
084303b8 AK |
1729 | case DW_CFA_val_offset: |
1730 | regno = insn->u.ri.reg; | |
1731 | offset = insn->u.ri.offset / DWARF2_CIE_DATA_ALIGNMENT; | |
1732 | if (offset < 0) | |
1733 | { | |
1734 | out_one (DW_CFA_val_offset_sf); | |
1735 | out_uleb128 (regno); | |
1736 | out_sleb128 (offset); | |
1737 | } | |
1738 | else | |
1739 | { | |
1740 | out_one (DW_CFA_val_offset); | |
1741 | out_uleb128 (regno); | |
1742 | out_uleb128 (offset); | |
1743 | } | |
1744 | break; | |
1745 | ||
a4447b93 RH |
1746 | case DW_CFA_register: |
1747 | out_one (DW_CFA_register); | |
1748 | out_uleb128 (insn->u.rr.reg1); | |
1749 | out_uleb128 (insn->u.rr.reg2); | |
39b82151 ML |
1750 | break; |
1751 | ||
2be24b54 ML |
1752 | case DW_CFA_remember_state: |
1753 | case DW_CFA_restore_state: | |
2be24b54 | 1754 | out_one (insn->insn); |
54cfded0 AM |
1755 | break; |
1756 | ||
364b6d8b JJ |
1757 | case DW_CFA_GNU_window_save: |
1758 | out_one (DW_CFA_GNU_window_save); | |
1759 | break; | |
1760 | ||
cdfbf930 RH |
1761 | case CFI_escape: |
1762 | { | |
1763 | struct cfi_escape_data *e; | |
1764 | for (e = insn->u.esc; e ; e = e->next) | |
1765 | emit_expr (&e->exp, 1); | |
1766 | break; | |
1767 | } | |
1768 | ||
f1c4cc75 RH |
1769 | case CFI_val_encoded_addr: |
1770 | { | |
83e12deb | 1771 | unsigned encoding = insn->u.ea.encoding; |
2f0c68f2 | 1772 | offsetT enc_size; |
f1c4cc75 RH |
1773 | |
1774 | if (encoding == DW_EH_PE_omit) | |
1775 | break; | |
1776 | out_one (DW_CFA_val_expression); | |
1777 | out_uleb128 (insn->u.ea.reg); | |
1778 | ||
83e12deb | 1779 | switch (encoding & 0x7) |
f1c4cc75 RH |
1780 | { |
1781 | case DW_EH_PE_absptr: | |
2f0c68f2 | 1782 | enc_size = DWARF2_ADDR_SIZE (stdoutput); |
f1c4cc75 RH |
1783 | break; |
1784 | case DW_EH_PE_udata2: | |
2f0c68f2 | 1785 | enc_size = 2; |
f1c4cc75 RH |
1786 | break; |
1787 | case DW_EH_PE_udata4: | |
2f0c68f2 | 1788 | enc_size = 4; |
f1c4cc75 RH |
1789 | break; |
1790 | case DW_EH_PE_udata8: | |
2f0c68f2 | 1791 | enc_size = 8; |
f1c4cc75 RH |
1792 | break; |
1793 | default: | |
1794 | abort (); | |
1795 | } | |
1796 | ||
1797 | /* If the user has requested absolute encoding, | |
1798 | then use the smaller DW_OP_addr encoding. */ | |
1799 | if (insn->u.ea.encoding == DW_EH_PE_absptr) | |
1800 | { | |
2f0c68f2 | 1801 | out_uleb128 (1 + enc_size); |
f1c4cc75 RH |
1802 | out_one (DW_OP_addr); |
1803 | } | |
1804 | else | |
1805 | { | |
2f0c68f2 | 1806 | out_uleb128 (1 + 1 + enc_size); |
f1c4cc75 RH |
1807 | out_one (DW_OP_GNU_encoded_addr); |
1808 | out_one (encoding); | |
1809 | ||
1810 | if ((encoding & 0x70) == DW_EH_PE_pcrel) | |
1811 | { | |
1812 | #if CFI_DIFF_EXPR_OK | |
1813 | insn->u.ea.exp.X_op = O_subtract; | |
1814 | insn->u.ea.exp.X_op_symbol = symbol_temp_new_now (); | |
1815 | #elif defined (tc_cfi_emit_pcrel_expr) | |
2f0c68f2 | 1816 | tc_cfi_emit_pcrel_expr (&insn->u.ea.exp, enc_size); |
f1c4cc75 RH |
1817 | break; |
1818 | #else | |
1819 | abort (); | |
1820 | #endif | |
1821 | } | |
1822 | } | |
2f0c68f2 | 1823 | emit_expr (&insn->u.ea.exp, enc_size); |
f1c4cc75 RH |
1824 | } |
1825 | break; | |
72b016b4 | 1826 | |
69602580 JB |
1827 | case CFI_label: |
1828 | colon (insn->u.sym_name); | |
1829 | break; | |
1830 | ||
54cfded0 | 1831 | default: |
a4447b93 | 1832 | abort (); |
54cfded0 | 1833 | } |
54cfded0 AM |
1834 | } |
1835 | ||
1836 | static void | |
5b7c81bd | 1837 | output_cie (struct cie_entry *cie, bool eh_frame, int align) |
54cfded0 | 1838 | { |
a4447b93 | 1839 | symbolS *after_size_address, *end_address; |
7c0295b1 | 1840 | expressionS exp; |
a4447b93 | 1841 | struct cfi_insn_data *i; |
9b8ae42e | 1842 | offsetT augmentation_size; |
8c9b70b1 | 1843 | int enc; |
38462edf | 1844 | enum dwarf2_format fmt = DWARF2_FORMAT (now_seg); |
a4447b93 RH |
1845 | |
1846 | cie->start_address = symbol_temp_new_now (); | |
1847 | after_size_address = symbol_temp_make (); | |
1848 | end_address = symbol_temp_make (); | |
1849 | ||
1850 | exp.X_op = O_subtract; | |
1851 | exp.X_add_symbol = end_address; | |
1852 | exp.X_op_symbol = after_size_address; | |
1853 | exp.X_add_number = 0; | |
1854 | ||
38462edf JJ |
1855 | if (eh_frame || fmt == dwarf2_format_32bit) |
1856 | emit_expr (&exp, 4); /* Length. */ | |
1857 | else | |
1858 | { | |
1859 | if (fmt == dwarf2_format_64bit) | |
1860 | out_four (-1); | |
1861 | emit_expr (&exp, 8); /* Length. */ | |
1862 | } | |
a4447b93 | 1863 | symbol_set_value_now (after_size_address); |
38462edf JJ |
1864 | if (eh_frame) |
1865 | out_four (0); /* CIE id. */ | |
1866 | else | |
1867 | { | |
1868 | out_four (-1); /* CIE id. */ | |
1869 | if (fmt != dwarf2_format_32bit) | |
1870 | out_four (-1); | |
1871 | } | |
66f8b2cb | 1872 | out_one (flag_dwarf_cie_version); /* Version. */ |
38462edf JJ |
1873 | if (eh_frame) |
1874 | { | |
1875 | out_one ('z'); /* Augmentation. */ | |
1876 | if (cie->per_encoding != DW_EH_PE_omit) | |
1877 | out_one ('P'); | |
1878 | if (cie->lsda_encoding != DW_EH_PE_omit) | |
1879 | out_one ('L'); | |
1880 | out_one ('R'); | |
09038062 | 1881 | #ifdef tc_output_cie_extra |
c6803386 | 1882 | tc_output_cie_extra (cie); |
09038062 | 1883 | #endif |
38462edf | 1884 | } |
d905c788 TS |
1885 | if (cie->signal_frame) |
1886 | out_one ('S'); | |
a4447b93 | 1887 | out_one (0); |
66f8b2cb AB |
1888 | if (flag_dwarf_cie_version >= 4) |
1889 | { | |
1890 | /* For now we are assuming a flat address space with 4 or 8 byte | |
1891 | addresses. */ | |
1892 | int address_size = dwarf2_format_32bit ? 4 : 8; | |
1893 | out_one (address_size); /* Address size. */ | |
1894 | out_one (0); /* Segment size. */ | |
1895 | } | |
289040ca NC |
1896 | out_uleb128 (DWARF2_LINE_MIN_INSN_LENGTH); /* Code alignment. */ |
1897 | out_sleb128 (DWARF2_CIE_DATA_ALIGNMENT); /* Data alignment. */ | |
66f8b2cb | 1898 | if (flag_dwarf_cie_version == 1) /* Return column. */ |
22eb4a06 AB |
1899 | { |
1900 | if ((cie->return_column & 0xff) != cie->return_column) | |
1901 | as_bad (_("return column number %d overflows in CIE version 1"), | |
1902 | cie->return_column); | |
1903 | out_one (cie->return_column); | |
1904 | } | |
0da76f83 NC |
1905 | else |
1906 | out_uleb128 (cie->return_column); | |
38462edf JJ |
1907 | if (eh_frame) |
1908 | { | |
1909 | augmentation_size = 1 + (cie->lsda_encoding != DW_EH_PE_omit); | |
1910 | if (cie->per_encoding != DW_EH_PE_omit) | |
1911 | augmentation_size += 1 + encoding_size (cie->per_encoding); | |
1912 | out_uleb128 (augmentation_size); /* Augmentation size. */ | |
4e4e1355 | 1913 | |
5b7c81bd | 1914 | emit_expr_encoded (&cie->personality, cie->per_encoding, true); |
4e4e1355 TS |
1915 | |
1916 | if (cie->lsda_encoding != DW_EH_PE_omit) | |
1917 | out_one (cie->lsda_encoding); | |
9b8ae42e | 1918 | } |
8c9b70b1 RH |
1919 | |
1920 | switch (DWARF2_FDE_RELOC_SIZE) | |
1921 | { | |
1922 | case 2: | |
1923 | enc = DW_EH_PE_sdata2; | |
1924 | break; | |
1925 | case 4: | |
1926 | enc = DW_EH_PE_sdata4; | |
1927 | break; | |
1928 | case 8: | |
1929 | enc = DW_EH_PE_sdata8; | |
1930 | break; | |
1931 | default: | |
1932 | abort (); | |
1933 | } | |
3dd24306 | 1934 | #if CFI_DIFF_EXPR_OK || defined tc_cfi_emit_pcrel_expr |
8c9b70b1 | 1935 | enc |= DW_EH_PE_pcrel; |
364b6d8b | 1936 | #endif |
2f0c68f2 CM |
1937 | #ifdef DWARF2_FDE_RELOC_ENCODING |
1938 | /* Allow target to override encoding. */ | |
1939 | enc = DWARF2_FDE_RELOC_ENCODING (enc); | |
1940 | #endif | |
1941 | cie->fde_encoding = enc; | |
38462edf JJ |
1942 | if (eh_frame) |
1943 | out_one (enc); | |
a4447b93 RH |
1944 | |
1945 | if (cie->first) | |
72b016b4 NC |
1946 | { |
1947 | for (i = cie->first; i != cie->last; i = i->next) | |
83e12deb | 1948 | { |
6303c4ae | 1949 | if (CUR_SEG (i) != CUR_SEG (cie)) |
72b016b4 NC |
1950 | continue; |
1951 | output_cfi_insn (i); | |
1952 | } | |
1953 | } | |
a4447b93 | 1954 | |
38462edf | 1955 | frag_align (align, DW_CFA_nop, 0); |
a4447b93 RH |
1956 | symbol_set_value_now (end_address); |
1957 | } | |
54cfded0 | 1958 | |
a4447b93 RH |
1959 | static void |
1960 | output_fde (struct fde_entry *fde, struct cie_entry *cie, | |
5b7c81bd | 1961 | bool eh_frame, struct cfi_insn_data *first, |
38462edf | 1962 | int align) |
a4447b93 RH |
1963 | { |
1964 | symbolS *after_size_address, *end_address; | |
1965 | expressionS exp; | |
9b8ae42e | 1966 | offsetT augmentation_size; |
38462edf | 1967 | enum dwarf2_format fmt = DWARF2_FORMAT (now_seg); |
ea0de82e AM |
1968 | unsigned int offset_size; |
1969 | unsigned int addr_size; | |
54cfded0 | 1970 | |
a4447b93 RH |
1971 | after_size_address = symbol_temp_make (); |
1972 | end_address = symbol_temp_make (); | |
54cfded0 | 1973 | |
a4447b93 RH |
1974 | exp.X_op = O_subtract; |
1975 | exp.X_add_symbol = end_address; | |
1976 | exp.X_op_symbol = after_size_address; | |
1977 | exp.X_add_number = 0; | |
38462edf JJ |
1978 | if (eh_frame || fmt == dwarf2_format_32bit) |
1979 | offset_size = 4; | |
1980 | else | |
1981 | { | |
1982 | if (fmt == dwarf2_format_64bit) | |
1983 | out_four (-1); | |
1984 | offset_size = 8; | |
1985 | } | |
1986 | emit_expr (&exp, offset_size); /* Length. */ | |
a4447b93 | 1987 | symbol_set_value_now (after_size_address); |
54cfded0 | 1988 | |
38462edf JJ |
1989 | if (eh_frame) |
1990 | { | |
3251495b | 1991 | exp.X_op = O_subtract; |
38462edf JJ |
1992 | exp.X_add_symbol = after_size_address; |
1993 | exp.X_op_symbol = cie->start_address; | |
3251495b RH |
1994 | exp.X_add_number = 0; |
1995 | emit_expr (&exp, offset_size); /* CIE offset. */ | |
38462edf JJ |
1996 | } |
1997 | else | |
1998 | { | |
3251495b | 1999 | TC_DWARF2_EMIT_OFFSET (cie->start_address, offset_size); |
38462edf | 2000 | } |
364b6d8b | 2001 | |
2f0c68f2 | 2002 | exp.X_op = O_symbol; |
38462edf JJ |
2003 | if (eh_frame) |
2004 | { | |
2f0c68f2 CM |
2005 | bfd_reloc_code_real_type code |
2006 | = tc_cfi_reloc_for_encoding (cie->fde_encoding); | |
ea0de82e | 2007 | addr_size = DWARF2_FDE_RELOC_SIZE; |
2f0c68f2 CM |
2008 | if (code != BFD_RELOC_NONE) |
2009 | { | |
2010 | reloc_howto_type *howto = bfd_reloc_type_lookup (stdoutput, code); | |
ea0de82e | 2011 | char *p = frag_more (addr_size); |
86b9fea1 | 2012 | gas_assert (addr_size == (unsigned) howto->bitsize / 8); |
ea0de82e AM |
2013 | md_number_to_chars (p, 0, addr_size); |
2014 | fix_new (frag_now, p - frag_now->fr_literal, addr_size, | |
2015 | fde->start_address, 0, howto->pc_relative, code); | |
2f0c68f2 CM |
2016 | } |
2017 | else | |
2018 | { | |
2019 | exp.X_op = O_subtract; | |
2020 | exp.X_add_number = 0; | |
3dd24306 | 2021 | #if CFI_DIFF_EXPR_OK |
2f0c68f2 CM |
2022 | exp.X_add_symbol = fde->start_address; |
2023 | exp.X_op_symbol = symbol_temp_new_now (); | |
ea0de82e | 2024 | emit_expr (&exp, addr_size); /* Code offset. */ |
364b6d8b | 2025 | #else |
2f0c68f2 CM |
2026 | exp.X_op = O_symbol; |
2027 | exp.X_add_symbol = fde->start_address; | |
2028 | ||
2029 | #if defined(tc_cfi_emit_pcrel_expr) | |
ea0de82e | 2030 | tc_cfi_emit_pcrel_expr (&exp, addr_size); /* Code offset. */ |
364b6d8b | 2031 | #else |
ea0de82e | 2032 | emit_expr (&exp, addr_size); /* Code offset. */ |
364b6d8b | 2033 | #endif |
364b6d8b | 2034 | #endif |
2f0c68f2 | 2035 | } |
38462edf JJ |
2036 | } |
2037 | else | |
2038 | { | |
3251495b | 2039 | exp.X_add_number = 0; |
2f0c68f2 | 2040 | exp.X_add_symbol = fde->start_address; |
38462edf JJ |
2041 | addr_size = DWARF2_ADDR_SIZE (stdoutput); |
2042 | emit_expr (&exp, addr_size); | |
2043 | } | |
54cfded0 | 2044 | |
38462edf | 2045 | exp.X_op = O_subtract; |
a4447b93 | 2046 | exp.X_add_symbol = fde->end_address; |
289040ca | 2047 | exp.X_op_symbol = fde->start_address; /* Code length. */ |
3251495b | 2048 | exp.X_add_number = 0; |
38462edf | 2049 | emit_expr (&exp, addr_size); |
54cfded0 | 2050 | |
9b8ae42e | 2051 | augmentation_size = encoding_size (fde->lsda_encoding); |
38462edf JJ |
2052 | if (eh_frame) |
2053 | out_uleb128 (augmentation_size); /* Augmentation size. */ | |
9b8ae42e | 2054 | |
5b7c81bd | 2055 | emit_expr_encoded (&fde->lsda, cie->lsda_encoding, false); |
39b82151 | 2056 | |
a4447b93 | 2057 | for (; first; first = first->next) |
6303c4ae | 2058 | if (CUR_SEG (first) == CUR_SEG (fde)) |
67ed7401 | 2059 | output_cfi_insn (first); |
39b82151 | 2060 | |
4df6ce47 | 2061 | frag_align (align, DW_CFA_nop, 0); |
a4447b93 RH |
2062 | symbol_set_value_now (end_address); |
2063 | } | |
2064 | ||
d20eb466 AM |
2065 | /* Allow these insns to be put in the initial sequence of a CIE. |
2066 | If J is non-NULL, then compare I and J insns for a match. */ | |
2067 | ||
2068 | static inline bool | |
2069 | initial_cie_insn (const struct cfi_insn_data *i, const struct cfi_insn_data *j) | |
2070 | { | |
2071 | if (j && i->insn != j->insn) | |
2072 | return false; | |
2073 | switch (i->insn) | |
2074 | { | |
2075 | case DW_CFA_offset: | |
2076 | case DW_CFA_def_cfa: | |
2077 | case DW_CFA_val_offset: | |
2078 | if (j) | |
2079 | { | |
2080 | if (i->u.ri.reg != j->u.ri.reg) | |
2081 | return false; | |
2082 | if (i->u.ri.offset != j->u.ri.offset) | |
2083 | return false; | |
2084 | } | |
2085 | break; | |
2086 | ||
2087 | case DW_CFA_register: | |
2088 | if (j) | |
2089 | { | |
2090 | if (i->u.rr.reg1 != j->u.rr.reg1) | |
2091 | return false; | |
2092 | if (i->u.rr.reg2 != j->u.rr.reg2) | |
2093 | return false; | |
2094 | } | |
2095 | break; | |
2096 | ||
2097 | case DW_CFA_def_cfa_register: | |
2098 | case DW_CFA_restore: | |
2099 | case DW_CFA_undefined: | |
2100 | case DW_CFA_same_value: | |
2101 | if (j) | |
2102 | { | |
2103 | if (i->u.r != j->u.r) | |
2104 | return false; | |
2105 | } | |
2106 | break; | |
2107 | ||
2108 | case DW_CFA_def_cfa_offset: | |
2109 | if (j) | |
2110 | { | |
2111 | if (i->u.i != j->u.i) | |
2112 | return false; | |
2113 | } | |
2114 | break; | |
2115 | ||
2116 | default: | |
2117 | return false; | |
2118 | } | |
2119 | return true; | |
2120 | } | |
2121 | ||
a4447b93 | 2122 | static struct cie_entry * |
5b7c81bd | 2123 | select_cie_for_fde (struct fde_entry *fde, bool eh_frame, |
38462edf | 2124 | struct cfi_insn_data **pfirst, int align) |
a4447b93 RH |
2125 | { |
2126 | struct cfi_insn_data *i, *j; | |
2127 | struct cie_entry *cie; | |
2128 | ||
2129 | for (cie = cie_root; cie; cie = cie->next) | |
39b82151 | 2130 | { |
6303c4ae | 2131 | if (CUR_SEG (cie) != CUR_SEG (fde)) |
67ed7401 | 2132 | continue; |
09038062 ST |
2133 | #ifdef tc_cie_fde_equivalent_extra |
2134 | if (!tc_cie_fde_equivalent_extra (cie, fde)) | |
2135 | continue; | |
2136 | #endif | |
67ed7401 | 2137 | if (cie->return_column != fde->return_column |
9b8ae42e JJ |
2138 | || cie->signal_frame != fde->signal_frame |
2139 | || cie->per_encoding != fde->per_encoding | |
2140 | || cie->lsda_encoding != fde->lsda_encoding) | |
a4447b93 | 2141 | continue; |
9b8ae42e JJ |
2142 | if (cie->per_encoding != DW_EH_PE_omit) |
2143 | { | |
2144 | if (cie->personality.X_op != fde->personality.X_op | |
9e1a8675 AM |
2145 | || (cie->personality.X_add_number |
2146 | != fde->personality.X_add_number)) | |
9b8ae42e JJ |
2147 | continue; |
2148 | switch (cie->personality.X_op) | |
2149 | { | |
2150 | case O_constant: | |
2151 | if (cie->personality.X_unsigned != fde->personality.X_unsigned) | |
2152 | continue; | |
2153 | break; | |
2154 | case O_symbol: | |
2155 | if (cie->personality.X_add_symbol | |
2156 | != fde->personality.X_add_symbol) | |
2157 | continue; | |
2158 | break; | |
2159 | default: | |
2160 | abort (); | |
2161 | } | |
2162 | } | |
a4447b93 RH |
2163 | for (i = cie->first, j = fde->data; |
2164 | i != cie->last && j != NULL; | |
2165 | i = i->next, j = j->next) | |
39b82151 | 2166 | { |
d20eb466 AM |
2167 | if (!initial_cie_insn (i, j)) |
2168 | break; | |
39b82151 | 2169 | } |
a4447b93 | 2170 | |
d20eb466 | 2171 | if (i == cie->last) |
39b82151 | 2172 | { |
a4447b93 RH |
2173 | *pfirst = j; |
2174 | return cie; | |
39b82151 | 2175 | } |
54cfded0 AM |
2176 | } |
2177 | ||
add39d23 | 2178 | cie = XNEW (struct cie_entry); |
a4447b93 RH |
2179 | cie->next = cie_root; |
2180 | cie_root = cie; | |
6303c4ae | 2181 | SET_CUR_SEG (cie, CUR_SEG (fde)); |
a4447b93 | 2182 | cie->return_column = fde->return_column; |
63752a75 | 2183 | cie->signal_frame = fde->signal_frame; |
9b8ae42e JJ |
2184 | cie->per_encoding = fde->per_encoding; |
2185 | cie->lsda_encoding = fde->lsda_encoding; | |
2186 | cie->personality = fde->personality; | |
a4447b93 | 2187 | cie->first = fde->data; |
09038062 ST |
2188 | #ifdef tc_cie_entry_init_extra |
2189 | tc_cie_entry_init_extra (cie, fde) | |
2190 | #endif | |
54cfded0 | 2191 | |
a4447b93 | 2192 | for (i = cie->first; i ; i = i->next) |
d20eb466 | 2193 | if (!initial_cie_insn (i, NULL)) |
a4447b93 | 2194 | break; |
54cfded0 | 2195 | |
a4447b93 RH |
2196 | cie->last = i; |
2197 | *pfirst = i; | |
38462edf JJ |
2198 | |
2199 | output_cie (cie, eh_frame, align); | |
54cfded0 | 2200 | |
a4447b93 | 2201 | return cie; |
54cfded0 AM |
2202 | } |
2203 | ||
38462edf JJ |
2204 | #ifdef md_reg_eh_frame_to_debug_frame |
2205 | static void | |
6303c4ae | 2206 | cfi_change_reg_numbers (struct cfi_insn_data *insn, segT ccseg) |
38462edf JJ |
2207 | { |
2208 | for (; insn; insn = insn->next) | |
72b016b4 | 2209 | { |
6303c4ae | 2210 | if (CUR_SEG (insn) != ccseg) |
83e12deb | 2211 | continue; |
72b016b4 NC |
2212 | switch (insn->insn) |
2213 | { | |
2214 | case DW_CFA_advance_loc: | |
2215 | case DW_CFA_def_cfa_offset: | |
2216 | case DW_CFA_remember_state: | |
2217 | case DW_CFA_restore_state: | |
2218 | case DW_CFA_GNU_window_save: | |
2219 | case CFI_escape: | |
73e76108 | 2220 | case CFI_label: |
72b016b4 | 2221 | break; |
38462edf | 2222 | |
72b016b4 NC |
2223 | case DW_CFA_def_cfa: |
2224 | case DW_CFA_offset: | |
2225 | insn->u.ri.reg = md_reg_eh_frame_to_debug_frame (insn->u.ri.reg); | |
2226 | break; | |
38462edf | 2227 | |
72b016b4 NC |
2228 | case DW_CFA_def_cfa_register: |
2229 | case DW_CFA_undefined: | |
2230 | case DW_CFA_same_value: | |
2231 | case DW_CFA_restore: | |
2232 | insn->u.r = md_reg_eh_frame_to_debug_frame (insn->u.r); | |
2233 | break; | |
38462edf | 2234 | |
72b016b4 NC |
2235 | case DW_CFA_register: |
2236 | insn->u.rr.reg1 = md_reg_eh_frame_to_debug_frame (insn->u.rr.reg1); | |
2237 | insn->u.rr.reg2 = md_reg_eh_frame_to_debug_frame (insn->u.rr.reg2); | |
2238 | break; | |
38462edf | 2239 | |
72b016b4 NC |
2240 | case CFI_val_encoded_addr: |
2241 | insn->u.ea.reg = md_reg_eh_frame_to_debug_frame (insn->u.ea.reg); | |
2242 | break; | |
38462edf | 2243 | |
72b016b4 NC |
2244 | default: |
2245 | abort (); | |
2246 | } | |
2247 | } | |
38462edf JJ |
2248 | } |
2249 | #else | |
72b016b4 | 2250 | #define cfi_change_reg_numbers(insn, cseg) do { } while (0) |
38462edf JJ |
2251 | #endif |
2252 | ||
2f0c68f2 CM |
2253 | #if SUPPORT_COMPACT_EH |
2254 | static void | |
2255 | cfi_emit_eh_header (symbolS *sym, bfd_vma addend) | |
72b016b4 | 2256 | { |
2f0c68f2 | 2257 | expressionS exp; |
72b016b4 | 2258 | |
2f0c68f2 CM |
2259 | exp.X_add_number = addend; |
2260 | exp.X_add_symbol = sym; | |
5b7c81bd | 2261 | emit_expr_encoded (&exp, DW_EH_PE_sdata4 | DW_EH_PE_pcrel, false); |
2f0c68f2 | 2262 | } |
72b016b4 | 2263 | |
2f0c68f2 CM |
2264 | static void |
2265 | output_eh_header (struct fde_entry *fde) | |
2266 | { | |
2267 | char *p; | |
2268 | bfd_vma addend; | |
2269 | ||
2270 | if (fde->eh_header_type == EH_COMPACT_INLINE) | |
2271 | addend = 0; | |
2272 | else | |
2273 | addend = 1; | |
2274 | ||
2275 | cfi_emit_eh_header (fde->start_address, addend); | |
2276 | ||
2277 | if (fde->eh_header_type == EH_COMPACT_INLINE) | |
2278 | { | |
2279 | p = frag_more (4); | |
2280 | /* Inline entries always use PR1. */ | |
2281 | *(p++) = 1; | |
2282 | memcpy(p, fde->eh_data, 3); | |
6303c4ae AM |
2283 | } |
2284 | else | |
2285 | { | |
2f0c68f2 CM |
2286 | if (fde->eh_header_type == EH_COMPACT_LEGACY) |
2287 | addend = 1; | |
2288 | else if (fde->eh_header_type == EH_COMPACT_OUTLINE | |
2289 | || fde->eh_header_type == EH_COMPACT_OUTLINE_DONE) | |
2290 | addend = 0; | |
2291 | else | |
2292 | abort (); | |
2293 | cfi_emit_eh_header (fde->eh_loc, addend); | |
6303c4ae | 2294 | } |
72b016b4 | 2295 | } |
2f0c68f2 | 2296 | #endif |
72b016b4 | 2297 | |
54cfded0 | 2298 | void |
a4447b93 | 2299 | cfi_finish (void) |
54cfded0 | 2300 | { |
72b016b4 NC |
2301 | struct cie_entry *cie, *cie_next; |
2302 | segT cfi_seg, ccseg; | |
a4447b93 | 2303 | struct fde_entry *fde; |
72b016b4 NC |
2304 | struct cfi_insn_data *first; |
2305 | int save_flag_traditional_format, seek_next_seg; | |
54cfded0 | 2306 | |
a4447b93 RH |
2307 | if (all_fde_data == 0) |
2308 | return; | |
54cfded0 | 2309 | |
2f0c68f2 CM |
2310 | if ((all_cfi_sections & CFI_EMIT_eh_frame) != 0 |
2311 | || (all_cfi_sections & CFI_EMIT_eh_frame_compact) != 0) | |
38462edf | 2312 | { |
38462edf JJ |
2313 | /* Make sure check_eh_frame doesn't do anything with our output. */ |
2314 | save_flag_traditional_format = flag_traditional_format; | |
2315 | flag_traditional_format = 1; | |
eafbc43f | 2316 | |
2f0c68f2 | 2317 | if (!EH_FRAME_LINKONCE) |
6303c4ae AM |
2318 | { |
2319 | /* Open .eh_frame section. */ | |
2320 | cfi_seg = get_cfi_seg (NULL, ".eh_frame", | |
2321 | (SEC_ALLOC | SEC_LOAD | SEC_DATA | |
2322 | | DWARF2_EH_FRAME_READ_ONLY), | |
2323 | EH_FRAME_ALIGNMENT); | |
67ed7401 | 2324 | #ifdef md_fix_up_eh_frame |
6303c4ae | 2325 | md_fix_up_eh_frame (cfi_seg); |
67ed7401 | 2326 | #else |
6303c4ae | 2327 | (void) cfi_seg; |
67ed7401 | 2328 | #endif |
6303c4ae | 2329 | } |
67ed7401 | 2330 | |
72b016b4 | 2331 | do |
83e12deb | 2332 | { |
72b016b4 | 2333 | ccseg = NULL; |
72b016b4 | 2334 | seek_next_seg = 0; |
67ed7401 | 2335 | |
72b016b4 | 2336 | for (cie = cie_root; cie; cie = cie_next) |
38462edf | 2337 | { |
72b016b4 NC |
2338 | cie_next = cie->next; |
2339 | free ((void *) cie); | |
38462edf | 2340 | } |
72b016b4 | 2341 | cie_root = NULL; |
38462edf | 2342 | |
72b016b4 NC |
2343 | for (fde = all_fde_data; fde ; fde = fde->next) |
2344 | { | |
2f0c68f2 CM |
2345 | if ((fde->sections & CFI_EMIT_eh_frame) == 0 |
2346 | && (fde->sections & CFI_EMIT_eh_frame_compact) == 0) | |
2347 | continue; | |
2348 | ||
2349 | #if SUPPORT_COMPACT_EH | |
2350 | /* Emit a LEGACY format header if we have processed all | |
9e1a8675 | 2351 | of the .cfi directives without encountering either inline or |
2f0c68f2 CM |
2352 | out-of-line compact unwinding opcodes. */ |
2353 | if (fde->eh_header_type == EH_COMPACT_HAS_LSDA | |
2354 | || fde->eh_header_type == EH_COMPACT_UNKNOWN) | |
2355 | fde->eh_header_type = EH_COMPACT_LEGACY; | |
2356 | ||
2357 | if (fde->eh_header_type != EH_COMPACT_LEGACY) | |
2358 | continue; | |
2359 | #endif | |
2360 | if (EH_FRAME_LINKONCE) | |
6303c4ae AM |
2361 | { |
2362 | if (HANDLED (fde)) | |
2363 | continue; | |
2364 | if (seek_next_seg && CUR_SEG (fde) != ccseg) | |
2365 | { | |
2366 | seek_next_seg = 2; | |
2367 | continue; | |
2368 | } | |
2369 | if (!seek_next_seg) | |
2370 | { | |
2371 | ccseg = CUR_SEG (fde); | |
2372 | /* Open .eh_frame section. */ | |
2373 | cfi_seg = get_cfi_seg (ccseg, ".eh_frame", | |
2374 | (SEC_ALLOC | SEC_LOAD | SEC_DATA | |
2375 | | DWARF2_EH_FRAME_READ_ONLY), | |
2376 | EH_FRAME_ALIGNMENT); | |
72b016b4 | 2377 | #ifdef md_fix_up_eh_frame |
6303c4ae | 2378 | md_fix_up_eh_frame (cfi_seg); |
67ed7401 | 2379 | #else |
6303c4ae | 2380 | (void) cfi_seg; |
72b016b4 | 2381 | #endif |
6303c4ae AM |
2382 | seek_next_seg = 1; |
2383 | } | |
2384 | SET_HANDLED (fde, 1); | |
72b016b4 | 2385 | } |
72b016b4 NC |
2386 | |
2387 | if (fde->end_address == NULL) | |
2388 | { | |
9e1a8675 AM |
2389 | as_bad (_("open CFI at the end of file; " |
2390 | "missing .cfi_endproc directive")); | |
72b016b4 NC |
2391 | fde->end_address = fde->start_address; |
2392 | } | |
2393 | ||
5b7c81bd | 2394 | cie = select_cie_for_fde (fde, true, &first, 2); |
2f0c68f2 | 2395 | fde->eh_loc = symbol_temp_new_now (); |
5b7c81bd | 2396 | output_fde (fde, cie, true, first, |
72b016b4 NC |
2397 | fde->next == NULL ? EH_FRAME_ALIGNMENT : 2); |
2398 | } | |
38462edf | 2399 | } |
2f0c68f2 | 2400 | while (EH_FRAME_LINKONCE && seek_next_seg == 2); |
72b016b4 | 2401 | |
2f0c68f2 | 2402 | if (EH_FRAME_LINKONCE) |
6303c4ae AM |
2403 | for (fde = all_fde_data; fde ; fde = fde->next) |
2404 | SET_HANDLED (fde, 0); | |
38462edf | 2405 | |
2f0c68f2 CM |
2406 | #if SUPPORT_COMPACT_EH |
2407 | if (compact_eh) | |
2408 | { | |
2409 | /* Create remaining out of line table entries. */ | |
2410 | do | |
2411 | { | |
2412 | ccseg = NULL; | |
2413 | seek_next_seg = 0; | |
2414 | ||
2415 | for (fde = all_fde_data; fde ; fde = fde->next) | |
2416 | { | |
2417 | if ((fde->sections & CFI_EMIT_eh_frame) == 0 | |
2418 | && (fde->sections & CFI_EMIT_eh_frame_compact) == 0) | |
2419 | continue; | |
2420 | ||
2421 | if (fde->eh_header_type != EH_COMPACT_OUTLINE) | |
2422 | continue; | |
2423 | if (HANDLED (fde)) | |
2424 | continue; | |
2425 | if (seek_next_seg && CUR_SEG (fde) != ccseg) | |
2426 | { | |
2427 | seek_next_seg = 2; | |
2428 | continue; | |
2429 | } | |
2430 | if (!seek_next_seg) | |
2431 | { | |
2432 | ccseg = CUR_SEG (fde); | |
2433 | /* Open .gnu_extab section. */ | |
2434 | get_cfi_seg (ccseg, ".gnu_extab", | |
2435 | (SEC_ALLOC | SEC_LOAD | SEC_DATA | |
2436 | | DWARF2_EH_FRAME_READ_ONLY), | |
2437 | 1); | |
2438 | seek_next_seg = 1; | |
2439 | } | |
2440 | SET_HANDLED (fde, 1); | |
2441 | ||
2442 | frag_align (1, 0, 0); | |
2443 | record_alignment (now_seg, 1); | |
2444 | output_compact_unwind_data (fde, 1); | |
2445 | } | |
2446 | } | |
2447 | while (EH_FRAME_LINKONCE && seek_next_seg == 2); | |
2448 | ||
2449 | for (fde = all_fde_data; fde ; fde = fde->next) | |
2450 | SET_HANDLED (fde, 0); | |
2451 | ||
2452 | /* Create index table fragments. */ | |
2453 | do | |
2454 | { | |
2455 | ccseg = NULL; | |
2456 | seek_next_seg = 0; | |
2457 | ||
2458 | for (fde = all_fde_data; fde ; fde = fde->next) | |
2459 | { | |
2460 | if ((fde->sections & CFI_EMIT_eh_frame) == 0 | |
2461 | && (fde->sections & CFI_EMIT_eh_frame_compact) == 0) | |
2462 | continue; | |
2463 | ||
2464 | if (HANDLED (fde)) | |
2465 | continue; | |
2466 | if (seek_next_seg && CUR_SEG (fde) != ccseg) | |
2467 | { | |
2468 | seek_next_seg = 2; | |
2469 | continue; | |
2470 | } | |
2471 | if (!seek_next_seg) | |
2472 | { | |
2473 | ccseg = CUR_SEG (fde); | |
2474 | /* Open .eh_frame_entry section. */ | |
2475 | cfi_seg = get_cfi_seg (ccseg, ".eh_frame_entry", | |
2476 | (SEC_ALLOC | SEC_LOAD | SEC_DATA | |
2477 | | DWARF2_EH_FRAME_READ_ONLY), | |
2478 | 2); | |
2479 | seek_next_seg = 1; | |
2480 | } | |
2481 | SET_HANDLED (fde, 1); | |
2482 | ||
2483 | output_eh_header (fde); | |
2484 | } | |
2485 | } | |
2486 | while (seek_next_seg == 2); | |
2487 | ||
2488 | for (fde = all_fde_data; fde ; fde = fde->next) | |
2489 | SET_HANDLED (fde, 0); | |
2490 | } | |
2491 | #endif /* SUPPORT_COMPACT_EH */ | |
2492 | ||
38462edf JJ |
2493 | flag_traditional_format = save_flag_traditional_format; |
2494 | } | |
2495 | ||
b52c4ee4 IB |
2496 | /* Generate SFrame section if the user specifies: |
2497 | - the command line option to gas, or | |
2498 | - .sframe in the .cfi_sections directive. */ | |
2499 | if (flag_gen_sframe || (all_cfi_sections & CFI_EMIT_sframe) != 0) | |
2500 | { | |
2501 | if (support_sframe_p ()) | |
2502 | { | |
2503 | segT sframe_seg; | |
2504 | int alignment = ffs (DWARF2_ADDR_SIZE (stdoutput)) - 1; | |
2505 | ||
2506 | if (!SUPPORT_FRAME_LINKONCE) | |
2507 | sframe_seg = get_cfi_seg (NULL, ".sframe", | |
2508 | (SEC_ALLOC | SEC_LOAD | SEC_DATA | |
2509 | | DWARF2_EH_FRAME_READ_ONLY), | |
2510 | alignment); | |
2511 | output_sframe (sframe_seg); | |
2512 | } | |
2513 | else | |
2514 | as_bad (_(".sframe not supported for target")); | |
2515 | } | |
2516 | ||
2f0c68f2 | 2517 | if ((all_cfi_sections & CFI_EMIT_debug_frame) != 0) |
a4447b93 | 2518 | { |
38462edf | 2519 | int alignment = ffs (DWARF2_ADDR_SIZE (stdoutput)) - 1; |
a4447b93 | 2520 | |
6303c4ae AM |
2521 | if (!SUPPORT_FRAME_LINKONCE) |
2522 | get_cfi_seg (NULL, ".debug_frame", | |
2523 | SEC_READONLY | SEC_DEBUGGING, | |
2524 | alignment); | |
2525 | ||
72b016b4 | 2526 | do |
83e12deb | 2527 | { |
72b016b4 | 2528 | ccseg = NULL; |
72b016b4 | 2529 | seek_next_seg = 0; |
67ed7401 | 2530 | |
72b016b4 | 2531 | for (cie = cie_root; cie; cie = cie_next) |
38462edf | 2532 | { |
72b016b4 NC |
2533 | cie_next = cie->next; |
2534 | free ((void *) cie); | |
38462edf | 2535 | } |
72b016b4 | 2536 | cie_root = NULL; |
38462edf | 2537 | |
72b016b4 NC |
2538 | for (fde = all_fde_data; fde ; fde = fde->next) |
2539 | { | |
2f0c68f2 CM |
2540 | if ((fde->sections & CFI_EMIT_debug_frame) == 0) |
2541 | continue; | |
2542 | ||
6303c4ae AM |
2543 | if (SUPPORT_FRAME_LINKONCE) |
2544 | { | |
2545 | if (HANDLED (fde)) | |
2546 | continue; | |
2547 | if (seek_next_seg && CUR_SEG (fde) != ccseg) | |
2548 | { | |
2549 | seek_next_seg = 2; | |
2550 | continue; | |
2551 | } | |
2552 | if (!seek_next_seg) | |
2553 | { | |
2554 | ccseg = CUR_SEG (fde); | |
2555 | /* Open .debug_frame section. */ | |
2556 | get_cfi_seg (ccseg, ".debug_frame", | |
2557 | SEC_READONLY | SEC_DEBUGGING, | |
2558 | alignment); | |
2559 | seek_next_seg = 1; | |
2560 | } | |
2561 | SET_HANDLED (fde, 1); | |
72b016b4 | 2562 | } |
72b016b4 NC |
2563 | if (fde->end_address == NULL) |
2564 | { | |
9e1a8675 AM |
2565 | as_bad (_("open CFI at the end of file; " |
2566 | "missing .cfi_endproc directive")); | |
72b016b4 NC |
2567 | fde->end_address = fde->start_address; |
2568 | } | |
2569 | ||
2570 | fde->per_encoding = DW_EH_PE_omit; | |
2571 | fde->lsda_encoding = DW_EH_PE_omit; | |
2572 | cfi_change_reg_numbers (fde->data, ccseg); | |
5b7c81bd AM |
2573 | cie = select_cie_for_fde (fde, false, &first, alignment); |
2574 | output_fde (fde, cie, false, first, alignment); | |
72b016b4 | 2575 | } |
38462edf | 2576 | } |
67ed7401 | 2577 | while (SUPPORT_FRAME_LINKONCE && seek_next_seg == 2); |
72b016b4 | 2578 | |
6303c4ae AM |
2579 | if (SUPPORT_FRAME_LINKONCE) |
2580 | for (fde = all_fde_data; fde ; fde = fde->next) | |
2581 | SET_HANDLED (fde, 0); | |
38462edf | 2582 | } |
5a210b9f AM |
2583 | if (dwcfi_hash) |
2584 | htab_delete (dwcfi_hash); | |
54cfded0 | 2585 | } |
0a7b15ff JB |
2586 | |
2587 | #else /* TARGET_USE_CFIPOP */ | |
d58a1929 | 2588 | |
5ff2bd08 | 2589 | /* Emit an intelligible error message for missing support. */ |
d58a1929 RH |
2590 | |
2591 | static void | |
2592 | dot_cfi_dummy (int ignored ATTRIBUTE_UNUSED) | |
2593 | { | |
2594 | as_bad (_("CFI is not supported for this target")); | |
2595 | ignore_rest_of_line (); | |
2596 | } | |
2597 | ||
2598 | const pseudo_typeS cfi_pseudo_table[] = | |
2599 | { | |
2600 | { "cfi_sections", dot_cfi_dummy, 0 }, | |
2601 | { "cfi_startproc", dot_cfi_dummy, 0 }, | |
2602 | { "cfi_endproc", dot_cfi_dummy, 0 }, | |
2f0c68f2 | 2603 | { "cfi_fde_data", dot_cfi_dummy, 0 }, |
d58a1929 RH |
2604 | { "cfi_def_cfa", dot_cfi_dummy, 0 }, |
2605 | { "cfi_def_cfa_register", dot_cfi_dummy, 0 }, | |
2606 | { "cfi_def_cfa_offset", dot_cfi_dummy, 0 }, | |
2607 | { "cfi_adjust_cfa_offset", dot_cfi_dummy, 0 }, | |
2608 | { "cfi_offset", dot_cfi_dummy, 0 }, | |
2609 | { "cfi_rel_offset", dot_cfi_dummy, 0 }, | |
2610 | { "cfi_register", dot_cfi_dummy, 0 }, | |
2611 | { "cfi_return_column", dot_cfi_dummy, 0 }, | |
2612 | { "cfi_restore", dot_cfi_dummy, 0 }, | |
2613 | { "cfi_undefined", dot_cfi_dummy, 0 }, | |
2614 | { "cfi_same_value", dot_cfi_dummy, 0 }, | |
2615 | { "cfi_remember_state", dot_cfi_dummy, 0 }, | |
2616 | { "cfi_restore_state", dot_cfi_dummy, 0 }, | |
2617 | { "cfi_window_save", dot_cfi_dummy, 0 }, | |
2618 | { "cfi_escape", dot_cfi_dummy, 0 }, | |
2619 | { "cfi_signal_frame", dot_cfi_dummy, 0 }, | |
2620 | { "cfi_personality", dot_cfi_dummy, 0 }, | |
2f0c68f2 | 2621 | { "cfi_personality_id", dot_cfi_dummy, 0 }, |
d58a1929 RH |
2622 | { "cfi_lsda", dot_cfi_dummy, 0 }, |
2623 | { "cfi_val_encoded_addr", dot_cfi_dummy, 0 }, | |
73e76108 | 2624 | { "cfi_label", dot_cfi_dummy, 0 }, |
2f0c68f2 | 2625 | { "cfi_inline_lsda", dot_cfi_dummy, 0 }, |
084303b8 | 2626 | { "cfi_val_offset", dot_cfi_dummy, 0 }, |
d58a1929 RH |
2627 | { NULL, NULL, 0 } |
2628 | }; | |
2629 | ||
0a7b15ff JB |
2630 | void |
2631 | cfi_finish (void) | |
2632 | { | |
2633 | } | |
2634 | #endif /* TARGET_USE_CFIPOP */ |