Commit | Line | Data |
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54cfded0 | 1 | /* dw2gencfi.c - Support for generating Dwarf2 CFI information. |
6f2750fe | 2 | Copyright (C) 2003-2016 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" |
54cfded0 | 26 | |
0a7b15ff | 27 | #ifdef TARGET_USE_CFIPOP |
a4447b93 | 28 | |
3dd24306 DA |
29 | /* By default, use difference expressions if DIFF_EXPR_OK is defined. */ |
30 | #ifndef CFI_DIFF_EXPR_OK | |
31 | # ifdef DIFF_EXPR_OK | |
32 | # define CFI_DIFF_EXPR_OK 1 | |
33 | # else | |
34 | # define CFI_DIFF_EXPR_OK 0 | |
35 | # endif | |
36 | #endif | |
37 | ||
2c678708 | 38 | #ifndef CFI_DIFF_LSDA_OK |
72b016b4 | 39 | #define CFI_DIFF_LSDA_OK CFI_DIFF_EXPR_OK |
2c678708 MK |
40 | #endif |
41 | ||
42 | #if CFI_DIFF_EXPR_OK == 1 && CFI_DIFF_LSDA_OK == 0 | |
43 | # error "CFI_DIFF_EXPR_OK should imply CFI_DIFF_LSDA_OK" | |
44 | #endif | |
45 | ||
a4447b93 RH |
46 | /* We re-use DWARF2_LINE_MIN_INSN_LENGTH for the code alignment field |
47 | of the CIE. Default to 1 if not otherwise specified. */ | |
72b016b4 NC |
48 | #ifndef DWARF2_LINE_MIN_INSN_LENGTH |
49 | #define DWARF2_LINE_MIN_INSN_LENGTH 1 | |
a4447b93 RH |
50 | #endif |
51 | ||
8c9b70b1 RH |
52 | /* By default, use 32-bit relocations from .eh_frame into .text. */ |
53 | #ifndef DWARF2_FDE_RELOC_SIZE | |
72b016b4 | 54 | #define DWARF2_FDE_RELOC_SIZE 4 |
8c9b70b1 RH |
55 | #endif |
56 | ||
57 | /* By default, use a read-only .eh_frame section. */ | |
58 | #ifndef DWARF2_EH_FRAME_READ_ONLY | |
72b016b4 | 59 | #define DWARF2_EH_FRAME_READ_ONLY SEC_READONLY |
8c9b70b1 RH |
60 | #endif |
61 | ||
9393cb0d | 62 | #ifndef EH_FRAME_ALIGNMENT |
72b016b4 | 63 | #define EH_FRAME_ALIGNMENT (bfd_get_arch_size (stdoutput) == 64 ? 3 : 2) |
9393cb0d JJ |
64 | #endif |
65 | ||
a4447b93 | 66 | #ifndef tc_cfi_frame_initial_instructions |
72b016b4 | 67 | #define tc_cfi_frame_initial_instructions() ((void)0) |
a4447b93 RH |
68 | #endif |
69 | ||
1bce6bd8 PB |
70 | #ifndef tc_cfi_startproc |
71 | # define tc_cfi_startproc() ((void)0) | |
72 | #endif | |
73 | ||
74 | #ifndef tc_cfi_endproc | |
6e789b26 | 75 | # define tc_cfi_endproc(fde) ((void) (fde)) |
1bce6bd8 PB |
76 | #endif |
77 | ||
2f0c68f2 CM |
78 | #define EH_FRAME_LINKONCE (SUPPORT_FRAME_LINKONCE || compact_eh) |
79 | ||
38462edf | 80 | #ifndef DWARF2_FORMAT |
72b016b4 | 81 | #define DWARF2_FORMAT(SEC) dwarf2_format_32bit |
38462edf JJ |
82 | #endif |
83 | ||
f1c4cc75 | 84 | #ifndef DWARF2_ADDR_SIZE |
72b016b4 | 85 | #define DWARF2_ADDR_SIZE(bfd) (bfd_arch_bits_per_address (bfd) / 8) |
f1c4cc75 RH |
86 | #endif |
87 | ||
2f0c68f2 | 88 | #if MULTIPLE_FRAME_SECTIONS |
6303c4ae | 89 | #define CUR_SEG(structp) structp->cur_seg |
34bca508 | 90 | #define SET_CUR_SEG(structp, seg) structp->cur_seg = seg |
6303c4ae AM |
91 | #define HANDLED(structp) structp->handled |
92 | #define SET_HANDLED(structp, val) structp->handled = val | |
93 | #else | |
94 | #define CUR_SEG(structp) NULL | |
95 | #define SET_CUR_SEG(structp, seg) (void) (0 && seg) | |
96 | #define HANDLED(structp) 0 | |
97 | #define SET_HANDLED(structp, val) (void) (0 && val) | |
98 | #endif | |
99 | ||
2f0c68f2 CM |
100 | #ifndef tc_cfi_reloc_for_encoding |
101 | #define tc_cfi_reloc_for_encoding(e) BFD_RELOC_NONE | |
102 | #endif | |
103 | ||
72b016b4 NC |
104 | /* Private segment collection list. */ |
105 | struct dwcfi_seg_list | |
106 | { | |
107 | segT seg; | |
108 | int subseg; | |
109 | char * seg_name; | |
110 | }; | |
111 | ||
2f0c68f2 CM |
112 | #ifdef SUPPORT_COMPACT_EH |
113 | static bfd_boolean compact_eh; | |
114 | #else | |
115 | #define compact_eh 0 | |
116 | #endif | |
72b016b4 NC |
117 | |
118 | static struct hash_control *dwcfi_hash; | |
2f0c68f2 CM |
119 | \f |
120 | /* Emit a single byte into the current segment. */ | |
121 | ||
122 | static inline void | |
123 | out_one (int byte) | |
124 | { | |
125 | FRAG_APPEND_1_CHAR (byte); | |
126 | } | |
127 | ||
128 | /* Emit a two-byte word into the current segment. */ | |
129 | ||
130 | static inline void | |
131 | out_two (int data) | |
132 | { | |
133 | md_number_to_chars (frag_more (2), data, 2); | |
134 | } | |
135 | ||
136 | /* Emit a four byte word into the current segment. */ | |
137 | ||
138 | static inline void | |
139 | out_four (int data) | |
140 | { | |
141 | md_number_to_chars (frag_more (4), data, 4); | |
142 | } | |
143 | ||
144 | /* Emit an unsigned "little-endian base 128" number. */ | |
145 | ||
146 | static void | |
147 | out_uleb128 (addressT value) | |
148 | { | |
149 | output_leb128 (frag_more (sizeof_leb128 (value, 0)), value, 0); | |
150 | } | |
151 | ||
152 | /* Emit an unsigned "little-endian base 128" number. */ | |
153 | ||
154 | static void | |
155 | out_sleb128 (offsetT value) | |
156 | { | |
157 | output_leb128 (frag_more (sizeof_leb128 (value, 1)), value, 1); | |
158 | } | |
159 | ||
160 | static offsetT | |
161 | encoding_size (unsigned char encoding) | |
162 | { | |
163 | if (encoding == DW_EH_PE_omit) | |
164 | return 0; | |
165 | switch (encoding & 0x7) | |
166 | { | |
167 | case 0: | |
168 | return bfd_get_arch_size (stdoutput) == 64 ? 8 : 4; | |
169 | case DW_EH_PE_udata2: | |
170 | return 2; | |
171 | case DW_EH_PE_udata4: | |
172 | return 4; | |
173 | case DW_EH_PE_udata8: | |
174 | return 8; | |
175 | default: | |
176 | abort (); | |
177 | } | |
178 | } | |
179 | ||
180 | /* Emit expression EXP in ENCODING. If EMIT_ENCODING is true, first | |
181 | emit a byte containing ENCODING. */ | |
182 | ||
183 | static void | |
184 | emit_expr_encoded (expressionS *exp, int encoding, bfd_boolean emit_encoding) | |
185 | { | |
186 | offsetT size = encoding_size (encoding); | |
187 | bfd_reloc_code_real_type code; | |
188 | ||
189 | if (encoding == DW_EH_PE_omit) | |
190 | return; | |
72b016b4 | 191 | |
2f0c68f2 CM |
192 | if (emit_encoding) |
193 | out_one (encoding); | |
194 | ||
195 | code = tc_cfi_reloc_for_encoding (encoding); | |
196 | if (code != BFD_RELOC_NONE) | |
197 | { | |
198 | reloc_howto_type *howto = bfd_reloc_type_lookup (stdoutput, code); | |
199 | char *p = frag_more (size); | |
200 | md_number_to_chars (p, 0, size); | |
201 | fix_new (frag_now, p - frag_now->fr_literal, size, exp->X_add_symbol, | |
202 | exp->X_add_number, howto->pc_relative, code); | |
203 | } | |
204 | else if ((encoding & 0x70) == DW_EH_PE_pcrel) | |
205 | { | |
206 | #if CFI_DIFF_EXPR_OK | |
207 | expressionS tmp = *exp; | |
208 | tmp.X_op = O_subtract; | |
209 | tmp.X_op_symbol = symbol_temp_new_now (); | |
210 | emit_expr (&tmp, size); | |
211 | #elif defined (tc_cfi_emit_pcrel_expr) | |
212 | tc_cfi_emit_pcrel_expr (exp, size); | |
213 | #else | |
214 | abort (); | |
215 | #endif | |
216 | } | |
217 | else | |
218 | emit_expr (exp, size); | |
219 | } | |
220 | \f | |
72b016b4 NC |
221 | /* Build based on segment the derived .debug_... |
222 | segment name containing origin segment's postfix name part. */ | |
223 | ||
224 | static char * | |
225 | get_debugseg_name (segT seg, const char *base_name) | |
226 | { | |
227 | const char *name; | |
228 | ||
229 | if (!seg) | |
230 | name = ""; | |
231 | else | |
232 | { | |
233 | const char * dollar; | |
234 | const char * dot; | |
235 | ||
236 | name = bfd_get_section_name (stdoutput, seg); | |
237 | ||
238 | dollar = strchr (name, '$'); | |
239 | dot = strchr (name + 1, '.'); | |
240 | ||
241 | if (!dollar && !dot) | |
2f0c68f2 CM |
242 | { |
243 | if (!strcmp (base_name, ".eh_frame_entry") | |
244 | && strcmp (name, ".text") != 0) | |
245 | return concat (base_name, ".", name, NULL); | |
246 | ||
247 | name = ""; | |
248 | } | |
72b016b4 NC |
249 | else if (!dollar) |
250 | name = dot; | |
251 | else if (!dot) | |
252 | name = dollar; | |
253 | else if (dot < dollar) | |
254 | name = dot; | |
255 | else | |
256 | name = dollar; | |
257 | } | |
258 | ||
259 | return concat (base_name, name, NULL); | |
260 | } | |
261 | ||
262 | /* Allocate a dwcfi_seg_list structure. */ | |
263 | ||
264 | static struct dwcfi_seg_list * | |
265 | alloc_debugseg_item (segT seg, int subseg, char *name) | |
266 | { | |
267 | struct dwcfi_seg_list *r; | |
268 | ||
269 | r = (struct dwcfi_seg_list *) | |
270 | xmalloc (sizeof (struct dwcfi_seg_list) + strlen (name)); | |
271 | r->seg = seg; | |
272 | r->subseg = subseg; | |
273 | r->seg_name = name; | |
274 | return r; | |
275 | } | |
276 | ||
277 | static segT | |
278 | is_now_linkonce_segment (void) | |
279 | { | |
2f0c68f2 CM |
280 | if (compact_eh) |
281 | return now_seg; | |
282 | ||
72b016b4 NC |
283 | if ((bfd_get_section_flags (stdoutput, now_seg) |
284 | & (SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD | |
285 | | SEC_LINK_DUPLICATES_ONE_ONLY | SEC_LINK_DUPLICATES_SAME_SIZE | |
286 | | SEC_LINK_DUPLICATES_SAME_CONTENTS)) != 0) | |
287 | return now_seg; | |
72b016b4 NC |
288 | return NULL; |
289 | } | |
290 | ||
291 | /* Generate debug... segment with same linkonce properties | |
292 | of based segment. */ | |
293 | ||
294 | static segT | |
295 | make_debug_seg (segT cseg, char *name, int sflags) | |
296 | { | |
297 | segT save_seg = now_seg; | |
298 | int save_subseg = now_subseg; | |
299 | segT r; | |
300 | flagword flags; | |
301 | ||
302 | r = subseg_new (name, 0); | |
303 | ||
304 | /* Check if code segment is marked as linked once. */ | |
305 | if (!cseg) | |
306 | flags = 0; | |
307 | else | |
308 | flags = bfd_get_section_flags (stdoutput, cseg) | |
309 | & (SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD | |
83e12deb MR |
310 | | SEC_LINK_DUPLICATES_ONE_ONLY | SEC_LINK_DUPLICATES_SAME_SIZE |
311 | | SEC_LINK_DUPLICATES_SAME_CONTENTS); | |
72b016b4 NC |
312 | |
313 | /* Add standard section flags. */ | |
314 | flags |= sflags; | |
315 | ||
316 | /* Apply possibly linked once flags to new generated segment, too. */ | |
317 | if (!bfd_set_section_flags (stdoutput, r, flags)) | |
318 | as_bad (_("bfd_set_section_flags: %s"), | |
319 | bfd_errmsg (bfd_get_error ())); | |
320 | ||
321 | /* Restore to previous segment. */ | |
322 | if (save_seg != NULL) | |
323 | subseg_set (save_seg, save_subseg); | |
324 | return r; | |
325 | } | |
326 | ||
327 | static void | |
328 | dwcfi_hash_insert (const char *name, struct dwcfi_seg_list *item) | |
329 | { | |
330 | const char *error_string; | |
331 | ||
332 | if ((error_string = hash_jam (dwcfi_hash, name, (char *) item))) | |
333 | as_fatal (_("Inserting \"%s\" into structure table failed: %s"), | |
334 | name, error_string); | |
335 | } | |
336 | ||
337 | static struct dwcfi_seg_list * | |
338 | dwcfi_hash_find (char *name) | |
339 | { | |
340 | return (struct dwcfi_seg_list *) hash_find (dwcfi_hash, name); | |
341 | } | |
342 | ||
343 | static struct dwcfi_seg_list * | |
344 | dwcfi_hash_find_or_make (segT cseg, const char *base_name, int flags) | |
345 | { | |
346 | struct dwcfi_seg_list *item; | |
347 | char *name; | |
348 | ||
349 | /* Initialize dwcfi_hash once. */ | |
350 | if (!dwcfi_hash) | |
351 | dwcfi_hash = hash_new (); | |
352 | ||
353 | name = get_debugseg_name (cseg, base_name); | |
354 | ||
355 | item = dwcfi_hash_find (name); | |
356 | if (!item) | |
357 | { | |
358 | item = alloc_debugseg_item (make_debug_seg (cseg, name, flags), 0, name); | |
359 | ||
360 | dwcfi_hash_insert (item->seg_name, item); | |
361 | } | |
362 | else | |
363 | free (name); | |
364 | ||
365 | return item; | |
366 | } | |
367 | ||
3251495b RH |
368 | /* ??? Share this with dwarf2cfg.c. */ |
369 | #ifndef TC_DWARF2_EMIT_OFFSET | |
370 | #define TC_DWARF2_EMIT_OFFSET generic_dwarf2_emit_offset | |
371 | ||
372 | /* Create an offset to .dwarf2_*. */ | |
373 | ||
374 | static void | |
375 | generic_dwarf2_emit_offset (symbolS *symbol, unsigned int size) | |
376 | { | |
377 | expressionS exp; | |
378 | ||
379 | exp.X_op = O_symbol; | |
380 | exp.X_add_symbol = symbol; | |
381 | exp.X_add_number = 0; | |
382 | emit_expr (&exp, size); | |
383 | } | |
384 | #endif | |
385 | ||
72b016b4 NC |
386 | struct cfi_escape_data |
387 | { | |
1e9cc1c2 NC |
388 | struct cfi_escape_data *next; |
389 | expressionS exp; | |
390 | }; | |
a4447b93 | 391 | |
a4447b93 | 392 | struct cie_entry |
39b82151 | 393 | { |
a4447b93 | 394 | struct cie_entry *next; |
2f0c68f2 | 395 | #if MULTIPLE_FRAME_SECTIONS |
72b016b4 | 396 | segT cur_seg; |
67ed7401 | 397 | #endif |
a4447b93 RH |
398 | symbolS *start_address; |
399 | unsigned int return_column; | |
63752a75 | 400 | unsigned int signal_frame; |
2f0c68f2 | 401 | unsigned char fde_encoding; |
9b8ae42e JJ |
402 | unsigned char per_encoding; |
403 | unsigned char lsda_encoding; | |
404 | expressionS personality; | |
a4447b93 | 405 | struct cfi_insn_data *first, *last; |
39b82151 ML |
406 | }; |
407 | ||
a4447b93 | 408 | /* List of FDE entries. */ |
72b016b4 | 409 | |
af385746 | 410 | struct fde_entry *all_fde_data; |
a4447b93 | 411 | static struct fde_entry **last_fde_data = &all_fde_data; |
39b82151 ML |
412 | |
413 | /* List of CIEs so that they could be reused. */ | |
414 | static struct cie_entry *cie_root; | |
415 | ||
fa87b337 RH |
416 | /* Stack of old CFI data, for save/restore. */ |
417 | struct cfa_save_data | |
418 | { | |
419 | struct cfa_save_data *next; | |
420 | offsetT cfa_offset; | |
421 | }; | |
422 | ||
ae424f82 JJ |
423 | /* Current open FDE entry. */ |
424 | struct frch_cfi_data | |
425 | { | |
426 | struct fde_entry *cur_fde_data; | |
427 | symbolS *last_address; | |
428 | offsetT cur_cfa_offset; | |
429 | struct cfa_save_data *cfa_save_stack; | |
430 | }; | |
a4447b93 RH |
431 | \f |
432 | /* Construct a new FDE structure and add it to the end of the fde list. */ | |
54cfded0 | 433 | |
a4447b93 RH |
434 | static struct fde_entry * |
435 | alloc_fde_entry (void) | |
436 | { | |
1e9cc1c2 NC |
437 | struct fde_entry *fde = (struct fde_entry *) |
438 | xcalloc (1, sizeof (struct fde_entry)); | |
54cfded0 | 439 | |
1e9cc1c2 NC |
440 | frchain_now->frch_cfi_data = (struct frch_cfi_data *) |
441 | xcalloc (1, sizeof (struct frch_cfi_data)); | |
ae424f82 | 442 | frchain_now->frch_cfi_data->cur_fde_data = fde; |
a4447b93 RH |
443 | *last_fde_data = fde; |
444 | last_fde_data = &fde->next; | |
6303c4ae AM |
445 | SET_CUR_SEG (fde, is_now_linkonce_segment ()); |
446 | SET_HANDLED (fde, 0); | |
a4447b93 RH |
447 | fde->last = &fde->data; |
448 | fde->return_column = DWARF2_DEFAULT_RETURN_COLUMN; | |
9b8ae42e JJ |
449 | fde->per_encoding = DW_EH_PE_omit; |
450 | fde->lsda_encoding = DW_EH_PE_omit; | |
2f0c68f2 | 451 | fde->eh_header_type = EH_COMPACT_UNKNOWN; |
a4447b93 RH |
452 | |
453 | return fde; | |
454 | } | |
455 | ||
456 | /* The following functions are available for a backend to construct its | |
457 | own unwind information, usually from legacy unwind directives. */ | |
458 | ||
459 | /* Construct a new INSN structure and add it to the end of the insn list | |
460 | for the currently active FDE. */ | |
461 | ||
2f0c68f2 CM |
462 | static bfd_boolean cfi_sections_set = FALSE; |
463 | static int cfi_sections = CFI_EMIT_eh_frame; | |
464 | int all_cfi_sections = 0; | |
465 | static struct fde_entry *last_fde; | |
466 | ||
a4447b93 RH |
467 | static struct cfi_insn_data * |
468 | alloc_cfi_insn_data (void) | |
54cfded0 | 469 | { |
1e9cc1c2 NC |
470 | struct cfi_insn_data *insn = (struct cfi_insn_data *) |
471 | xcalloc (1, sizeof (struct cfi_insn_data)); | |
ae424f82 | 472 | struct fde_entry *cur_fde_data = frchain_now->frch_cfi_data->cur_fde_data; |
a4447b93 RH |
473 | |
474 | *cur_fde_data->last = insn; | |
475 | cur_fde_data->last = &insn->next; | |
6303c4ae | 476 | SET_CUR_SEG (insn, is_now_linkonce_segment ()); |
a4447b93 | 477 | return insn; |
54cfded0 AM |
478 | } |
479 | ||
a4447b93 RH |
480 | /* Construct a new FDE structure that begins at LABEL. */ |
481 | ||
72b016b4 | 482 | void |
a4447b93 | 483 | cfi_new_fde (symbolS *label) |
54cfded0 | 484 | { |
a4447b93 RH |
485 | struct fde_entry *fde = alloc_fde_entry (); |
486 | fde->start_address = label; | |
ae424f82 | 487 | frchain_now->frch_cfi_data->last_address = label; |
54cfded0 AM |
488 | } |
489 | ||
a4447b93 RH |
490 | /* End the currently open FDE. */ |
491 | ||
72b016b4 | 492 | void |
a4447b93 | 493 | cfi_end_fde (symbolS *label) |
54cfded0 | 494 | { |
ae424f82 JJ |
495 | frchain_now->frch_cfi_data->cur_fde_data->end_address = label; |
496 | free (frchain_now->frch_cfi_data); | |
497 | frchain_now->frch_cfi_data = NULL; | |
54cfded0 AM |
498 | } |
499 | ||
a4447b93 RH |
500 | /* Set the return column for the current FDE. */ |
501 | ||
502 | void | |
503 | cfi_set_return_column (unsigned regno) | |
54cfded0 | 504 | { |
ae424f82 | 505 | frchain_now->frch_cfi_data->cur_fde_data->return_column = regno; |
a4447b93 | 506 | } |
54cfded0 | 507 | |
2f0c68f2 CM |
508 | void |
509 | cfi_set_sections (void) | |
510 | { | |
511 | frchain_now->frch_cfi_data->cur_fde_data->sections = all_cfi_sections; | |
bd5608dc | 512 | cfi_sections_set = TRUE; |
2f0c68f2 CM |
513 | } |
514 | ||
2be24b54 ML |
515 | /* Universal functions to store new instructions. */ |
516 | ||
517 | static void | |
72b016b4 | 518 | cfi_add_CFA_insn (int insn) |
2be24b54 ML |
519 | { |
520 | struct cfi_insn_data *insn_ptr = alloc_cfi_insn_data (); | |
521 | ||
522 | insn_ptr->insn = insn; | |
523 | } | |
524 | ||
525 | static void | |
526 | cfi_add_CFA_insn_reg (int insn, unsigned regno) | |
527 | { | |
528 | struct cfi_insn_data *insn_ptr = alloc_cfi_insn_data (); | |
529 | ||
530 | insn_ptr->insn = insn; | |
531 | insn_ptr->u.r = regno; | |
532 | } | |
533 | ||
534 | static void | |
535 | cfi_add_CFA_insn_offset (int insn, offsetT offset) | |
536 | { | |
537 | struct cfi_insn_data *insn_ptr = alloc_cfi_insn_data (); | |
538 | ||
539 | insn_ptr->insn = insn; | |
540 | insn_ptr->u.i = offset; | |
541 | } | |
542 | ||
543 | static void | |
544 | cfi_add_CFA_insn_reg_reg (int insn, unsigned reg1, unsigned reg2) | |
545 | { | |
546 | struct cfi_insn_data *insn_ptr = alloc_cfi_insn_data (); | |
547 | ||
548 | insn_ptr->insn = insn; | |
549 | insn_ptr->u.rr.reg1 = reg1; | |
550 | insn_ptr->u.rr.reg2 = reg2; | |
551 | } | |
552 | ||
553 | static void | |
554 | cfi_add_CFA_insn_reg_offset (int insn, unsigned regno, offsetT offset) | |
555 | { | |
556 | struct cfi_insn_data *insn_ptr = alloc_cfi_insn_data (); | |
557 | ||
558 | insn_ptr->insn = insn; | |
559 | insn_ptr->u.ri.reg = regno; | |
560 | insn_ptr->u.ri.offset = offset; | |
561 | } | |
562 | ||
a4447b93 | 563 | /* Add a CFI insn to advance the PC from the last address to LABEL. */ |
54cfded0 | 564 | |
a4447b93 RH |
565 | void |
566 | cfi_add_advance_loc (symbolS *label) | |
567 | { | |
568 | struct cfi_insn_data *insn = alloc_cfi_insn_data (); | |
7c0295b1 | 569 | |
a4447b93 | 570 | insn->insn = DW_CFA_advance_loc; |
ae424f82 | 571 | insn->u.ll.lab1 = frchain_now->frch_cfi_data->last_address; |
a4447b93 | 572 | insn->u.ll.lab2 = label; |
54cfded0 | 573 | |
ae424f82 | 574 | frchain_now->frch_cfi_data->last_address = label; |
a4447b93 | 575 | } |
54cfded0 | 576 | |
69602580 JB |
577 | /* Add a CFI insn to label the current position in the CFI segment. */ |
578 | ||
579 | void | |
580 | cfi_add_label (const char *name) | |
581 | { | |
582 | unsigned int len = strlen (name) + 1; | |
583 | struct cfi_insn_data *insn = alloc_cfi_insn_data (); | |
584 | ||
585 | insn->insn = CFI_label; | |
586 | obstack_grow (¬es, name, len); | |
587 | insn->u.sym_name = (char *) obstack_finish (¬es); | |
588 | } | |
589 | ||
a4447b93 RH |
590 | /* Add a DW_CFA_offset record to the CFI data. */ |
591 | ||
592 | void | |
593 | cfi_add_CFA_offset (unsigned regno, offsetT offset) | |
594 | { | |
fa87b337 RH |
595 | unsigned int abs_data_align; |
596 | ||
9c2799c2 | 597 | gas_assert (DWARF2_CIE_DATA_ALIGNMENT != 0); |
2be24b54 | 598 | cfi_add_CFA_insn_reg_offset (DW_CFA_offset, regno, offset); |
fa87b337 RH |
599 | |
600 | abs_data_align = (DWARF2_CIE_DATA_ALIGNMENT < 0 | |
601 | ? -DWARF2_CIE_DATA_ALIGNMENT : DWARF2_CIE_DATA_ALIGNMENT); | |
602 | if (offset % abs_data_align) | |
603 | as_bad (_("register save offset not a multiple of %u"), abs_data_align); | |
a4447b93 | 604 | } |
54cfded0 | 605 | |
a4447b93 | 606 | /* Add a DW_CFA_def_cfa record to the CFI data. */ |
54cfded0 | 607 | |
a4447b93 RH |
608 | void |
609 | cfi_add_CFA_def_cfa (unsigned regno, offsetT offset) | |
610 | { | |
2be24b54 | 611 | cfi_add_CFA_insn_reg_offset (DW_CFA_def_cfa, regno, offset); |
ae424f82 | 612 | frchain_now->frch_cfi_data->cur_cfa_offset = offset; |
54cfded0 AM |
613 | } |
614 | ||
a4447b93 RH |
615 | /* Add a DW_CFA_register record to the CFI data. */ |
616 | ||
617 | void | |
618 | cfi_add_CFA_register (unsigned reg1, unsigned reg2) | |
54cfded0 | 619 | { |
2be24b54 | 620 | cfi_add_CFA_insn_reg_reg (DW_CFA_register, reg1, reg2); |
54cfded0 AM |
621 | } |
622 | ||
a4447b93 RH |
623 | /* Add a DW_CFA_def_cfa_register record to the CFI data. */ |
624 | ||
625 | void | |
626 | cfi_add_CFA_def_cfa_register (unsigned regno) | |
54cfded0 | 627 | { |
2be24b54 | 628 | cfi_add_CFA_insn_reg (DW_CFA_def_cfa_register, regno); |
54cfded0 AM |
629 | } |
630 | ||
a4447b93 RH |
631 | /* Add a DW_CFA_def_cfa_offset record to the CFI data. */ |
632 | ||
54cfded0 | 633 | void |
a4447b93 | 634 | cfi_add_CFA_def_cfa_offset (offsetT offset) |
54cfded0 | 635 | { |
2be24b54 | 636 | cfi_add_CFA_insn_offset (DW_CFA_def_cfa_offset, offset); |
ae424f82 | 637 | frchain_now->frch_cfi_data->cur_cfa_offset = offset; |
a4447b93 | 638 | } |
54cfded0 | 639 | |
2be24b54 ML |
640 | void |
641 | cfi_add_CFA_restore (unsigned regno) | |
642 | { | |
643 | cfi_add_CFA_insn_reg (DW_CFA_restore, regno); | |
644 | } | |
645 | ||
646 | void | |
647 | cfi_add_CFA_undefined (unsigned regno) | |
648 | { | |
649 | cfi_add_CFA_insn_reg (DW_CFA_undefined, regno); | |
650 | } | |
651 | ||
652 | void | |
653 | cfi_add_CFA_same_value (unsigned regno) | |
654 | { | |
655 | cfi_add_CFA_insn_reg (DW_CFA_same_value, regno); | |
656 | } | |
657 | ||
658 | void | |
659 | cfi_add_CFA_remember_state (void) | |
660 | { | |
fa87b337 RH |
661 | struct cfa_save_data *p; |
662 | ||
2be24b54 | 663 | cfi_add_CFA_insn (DW_CFA_remember_state); |
fa87b337 | 664 | |
1e9cc1c2 | 665 | p = (struct cfa_save_data *) xmalloc (sizeof (*p)); |
ae424f82 JJ |
666 | p->cfa_offset = frchain_now->frch_cfi_data->cur_cfa_offset; |
667 | p->next = frchain_now->frch_cfi_data->cfa_save_stack; | |
668 | frchain_now->frch_cfi_data->cfa_save_stack = p; | |
2be24b54 ML |
669 | } |
670 | ||
671 | void | |
672 | cfi_add_CFA_restore_state (void) | |
673 | { | |
fa87b337 RH |
674 | struct cfa_save_data *p; |
675 | ||
2be24b54 | 676 | cfi_add_CFA_insn (DW_CFA_restore_state); |
fa87b337 | 677 | |
ae424f82 | 678 | p = frchain_now->frch_cfi_data->cfa_save_stack; |
fa87b337 RH |
679 | if (p) |
680 | { | |
ae424f82 JJ |
681 | frchain_now->frch_cfi_data->cur_cfa_offset = p->cfa_offset; |
682 | frchain_now->frch_cfi_data->cfa_save_stack = p->next; | |
fa87b337 RH |
683 | free (p); |
684 | } | |
289040ca NC |
685 | else |
686 | as_bad (_("CFI state restore without previous remember")); | |
2be24b54 ML |
687 | } |
688 | ||
a4447b93 RH |
689 | \f |
690 | /* Parse CFI assembler directives. */ | |
54cfded0 | 691 | |
a4447b93 | 692 | static void dot_cfi (int); |
cdfbf930 | 693 | static void dot_cfi_escape (int); |
38462edf | 694 | static void dot_cfi_sections (int); |
a4447b93 RH |
695 | static void dot_cfi_startproc (int); |
696 | static void dot_cfi_endproc (int); | |
2f0c68f2 | 697 | static void dot_cfi_fde_data (int); |
9b8ae42e | 698 | static void dot_cfi_personality (int); |
2f0c68f2 | 699 | static void dot_cfi_personality_id (int); |
9b8ae42e | 700 | static void dot_cfi_lsda (int); |
f1c4cc75 | 701 | static void dot_cfi_val_encoded_addr (int); |
2f0c68f2 | 702 | static void dot_cfi_inline_lsda (int); |
69602580 | 703 | static void dot_cfi_label (int); |
54cfded0 | 704 | |
a4447b93 RH |
705 | const pseudo_typeS cfi_pseudo_table[] = |
706 | { | |
38462edf | 707 | { "cfi_sections", dot_cfi_sections, 0 }, |
a4447b93 RH |
708 | { "cfi_startproc", dot_cfi_startproc, 0 }, |
709 | { "cfi_endproc", dot_cfi_endproc, 0 }, | |
2f0c68f2 | 710 | { "cfi_fde_data", dot_cfi_fde_data, 0 }, |
a4447b93 RH |
711 | { "cfi_def_cfa", dot_cfi, DW_CFA_def_cfa }, |
712 | { "cfi_def_cfa_register", dot_cfi, DW_CFA_def_cfa_register }, | |
713 | { "cfi_def_cfa_offset", dot_cfi, DW_CFA_def_cfa_offset }, | |
714 | { "cfi_adjust_cfa_offset", dot_cfi, CFI_adjust_cfa_offset }, | |
715 | { "cfi_offset", dot_cfi, DW_CFA_offset }, | |
fa87b337 | 716 | { "cfi_rel_offset", dot_cfi, CFI_rel_offset }, |
a4447b93 | 717 | { "cfi_register", dot_cfi, DW_CFA_register }, |
2be24b54 ML |
718 | { "cfi_return_column", dot_cfi, CFI_return_column }, |
719 | { "cfi_restore", dot_cfi, DW_CFA_restore }, | |
720 | { "cfi_undefined", dot_cfi, DW_CFA_undefined }, | |
721 | { "cfi_same_value", dot_cfi, DW_CFA_same_value }, | |
722 | { "cfi_remember_state", dot_cfi, DW_CFA_remember_state }, | |
723 | { "cfi_restore_state", dot_cfi, DW_CFA_restore_state }, | |
6749011b | 724 | { "cfi_window_save", dot_cfi, DW_CFA_GNU_window_save }, |
cdfbf930 | 725 | { "cfi_escape", dot_cfi_escape, 0 }, |
63752a75 | 726 | { "cfi_signal_frame", dot_cfi, CFI_signal_frame }, |
9b8ae42e | 727 | { "cfi_personality", dot_cfi_personality, 0 }, |
2f0c68f2 | 728 | { "cfi_personality_id", dot_cfi_personality_id, 0 }, |
9b8ae42e | 729 | { "cfi_lsda", dot_cfi_lsda, 0 }, |
f1c4cc75 | 730 | { "cfi_val_encoded_addr", dot_cfi_val_encoded_addr, 0 }, |
2f0c68f2 | 731 | { "cfi_inline_lsda", dot_cfi_inline_lsda, 0 }, |
69602580 | 732 | { "cfi_label", dot_cfi_label, 0 }, |
a4447b93 RH |
733 | { NULL, NULL, 0 } |
734 | }; | |
54cfded0 AM |
735 | |
736 | static void | |
a4447b93 | 737 | cfi_parse_separator (void) |
54cfded0 | 738 | { |
a4447b93 RH |
739 | SKIP_WHITESPACE (); |
740 | if (*input_line_pointer == ',') | |
741 | input_line_pointer++; | |
742 | else | |
743 | as_bad (_("missing separator")); | |
54cfded0 AM |
744 | } |
745 | ||
a60de03c JB |
746 | #ifndef tc_parse_to_dw2regnum |
747 | static void | |
72b016b4 | 748 | tc_parse_to_dw2regnum (expressionS *exp) |
54cfded0 | 749 | { |
a60de03c | 750 | # ifdef tc_regname_to_dw2regnum |
a4447b93 RH |
751 | SKIP_WHITESPACE (); |
752 | if (is_name_beginner (*input_line_pointer) | |
753 | || (*input_line_pointer == '%' | |
754 | && is_name_beginner (*++input_line_pointer))) | |
755 | { | |
756 | char *name, c; | |
757 | ||
d02603dc | 758 | c = get_symbol_name (& name); |
a4447b93 | 759 | |
a60de03c JB |
760 | exp->X_op = O_constant; |
761 | exp->X_add_number = tc_regname_to_dw2regnum (name); | |
54cfded0 | 762 | |
d02603dc | 763 | restore_line_pointer (c); |
a4447b93 | 764 | } |
a60de03c JB |
765 | else |
766 | # endif | |
767 | expression_and_evaluate (exp); | |
768 | } | |
a4447b93 RH |
769 | #endif |
770 | ||
a60de03c JB |
771 | static unsigned |
772 | cfi_parse_reg (void) | |
773 | { | |
774 | int regno; | |
775 | expressionS exp; | |
776 | ||
777 | tc_parse_to_dw2regnum (&exp); | |
a4447b93 | 778 | switch (exp.X_op) |
54cfded0 | 779 | { |
a4447b93 RH |
780 | case O_register: |
781 | case O_constant: | |
782 | regno = exp.X_add_number; | |
783 | break; | |
784 | ||
785 | default: | |
a60de03c JB |
786 | regno = -1; |
787 | break; | |
788 | } | |
789 | ||
790 | if (regno < 0) | |
791 | { | |
a4447b93 RH |
792 | as_bad (_("bad register expression")); |
793 | regno = 0; | |
54cfded0 AM |
794 | } |
795 | ||
a4447b93 RH |
796 | return regno; |
797 | } | |
798 | ||
799 | static offsetT | |
800 | cfi_parse_const (void) | |
801 | { | |
802 | return get_absolute_expression (); | |
54cfded0 AM |
803 | } |
804 | ||
805 | static void | |
a4447b93 | 806 | dot_cfi (int arg) |
54cfded0 | 807 | { |
a4447b93 RH |
808 | offsetT offset; |
809 | unsigned reg1, reg2; | |
54cfded0 | 810 | |
ae424f82 | 811 | if (frchain_now->frch_cfi_data == NULL) |
54cfded0 AM |
812 | { |
813 | as_bad (_("CFI instruction used without previous .cfi_startproc")); | |
7c9c8381 | 814 | ignore_rest_of_line (); |
54cfded0 AM |
815 | return; |
816 | } | |
817 | ||
a4447b93 | 818 | /* If the last address was not at the current PC, advance to current. */ |
ae424f82 JJ |
819 | if (symbol_get_frag (frchain_now->frch_cfi_data->last_address) != frag_now |
820 | || S_GET_VALUE (frchain_now->frch_cfi_data->last_address) | |
821 | != frag_now_fix ()) | |
a4447b93 | 822 | cfi_add_advance_loc (symbol_temp_new_now ()); |
54cfded0 AM |
823 | |
824 | switch (arg) | |
825 | { | |
a4447b93 | 826 | case DW_CFA_offset: |
a4447b93 RH |
827 | reg1 = cfi_parse_reg (); |
828 | cfi_parse_separator (); | |
829 | offset = cfi_parse_const (); | |
2be24b54 ML |
830 | cfi_add_CFA_offset (reg1, offset); |
831 | break; | |
a4447b93 | 832 | |
fa87b337 RH |
833 | case CFI_rel_offset: |
834 | reg1 = cfi_parse_reg (); | |
835 | cfi_parse_separator (); | |
836 | offset = cfi_parse_const (); | |
ae424f82 JJ |
837 | cfi_add_CFA_offset (reg1, |
838 | offset - frchain_now->frch_cfi_data->cur_cfa_offset); | |
fa87b337 RH |
839 | break; |
840 | ||
2be24b54 ML |
841 | case DW_CFA_def_cfa: |
842 | reg1 = cfi_parse_reg (); | |
843 | cfi_parse_separator (); | |
844 | offset = cfi_parse_const (); | |
845 | cfi_add_CFA_def_cfa (reg1, offset); | |
54cfded0 AM |
846 | break; |
847 | ||
a4447b93 RH |
848 | case DW_CFA_register: |
849 | reg1 = cfi_parse_reg (); | |
850 | cfi_parse_separator (); | |
851 | reg2 = cfi_parse_reg (); | |
a4447b93 | 852 | cfi_add_CFA_register (reg1, reg2); |
39b82151 ML |
853 | break; |
854 | ||
a4447b93 RH |
855 | case DW_CFA_def_cfa_register: |
856 | reg1 = cfi_parse_reg (); | |
857 | cfi_add_CFA_def_cfa_register (reg1); | |
54cfded0 AM |
858 | break; |
859 | ||
a4447b93 RH |
860 | case DW_CFA_def_cfa_offset: |
861 | offset = cfi_parse_const (); | |
862 | cfi_add_CFA_def_cfa_offset (offset); | |
54cfded0 AM |
863 | break; |
864 | ||
54cfded0 | 865 | case CFI_adjust_cfa_offset: |
a4447b93 | 866 | offset = cfi_parse_const (); |
ae424f82 JJ |
867 | cfi_add_CFA_def_cfa_offset (frchain_now->frch_cfi_data->cur_cfa_offset |
868 | + offset); | |
54cfded0 AM |
869 | break; |
870 | ||
2be24b54 | 871 | case DW_CFA_restore: |
b57d375b JB |
872 | for (;;) |
873 | { | |
874 | reg1 = cfi_parse_reg (); | |
875 | cfi_add_CFA_restore (reg1); | |
876 | SKIP_WHITESPACE (); | |
877 | if (*input_line_pointer != ',') | |
878 | break; | |
879 | ++input_line_pointer; | |
880 | } | |
2be24b54 ML |
881 | break; |
882 | ||
883 | case DW_CFA_undefined: | |
b57d375b JB |
884 | for (;;) |
885 | { | |
886 | reg1 = cfi_parse_reg (); | |
887 | cfi_add_CFA_undefined (reg1); | |
888 | SKIP_WHITESPACE (); | |
889 | if (*input_line_pointer != ',') | |
890 | break; | |
891 | ++input_line_pointer; | |
892 | } | |
2be24b54 ML |
893 | break; |
894 | ||
895 | case DW_CFA_same_value: | |
896 | reg1 = cfi_parse_reg (); | |
897 | cfi_add_CFA_same_value (reg1); | |
898 | break; | |
899 | ||
900 | case CFI_return_column: | |
901 | reg1 = cfi_parse_reg (); | |
902 | cfi_set_return_column (reg1); | |
903 | break; | |
904 | ||
905 | case DW_CFA_remember_state: | |
906 | cfi_add_CFA_remember_state (); | |
907 | break; | |
908 | ||
909 | case DW_CFA_restore_state: | |
910 | cfi_add_CFA_restore_state (); | |
911 | break; | |
912 | ||
364b6d8b JJ |
913 | case DW_CFA_GNU_window_save: |
914 | cfi_add_CFA_insn (DW_CFA_GNU_window_save); | |
915 | break; | |
916 | ||
63752a75 | 917 | case CFI_signal_frame: |
ae424f82 | 918 | frchain_now->frch_cfi_data->cur_fde_data->signal_frame = 1; |
63752a75 JJ |
919 | break; |
920 | ||
54cfded0 | 921 | default: |
a4447b93 | 922 | abort (); |
54cfded0 | 923 | } |
54cfded0 | 924 | |
a4447b93 | 925 | demand_empty_rest_of_line (); |
54cfded0 AM |
926 | } |
927 | ||
cdfbf930 RH |
928 | static void |
929 | dot_cfi_escape (int ignored ATTRIBUTE_UNUSED) | |
930 | { | |
931 | struct cfi_escape_data *head, **tail, *e; | |
932 | struct cfi_insn_data *insn; | |
933 | ||
ae424f82 | 934 | if (frchain_now->frch_cfi_data == NULL) |
cdfbf930 RH |
935 | { |
936 | as_bad (_("CFI instruction used without previous .cfi_startproc")); | |
7c9c8381 | 937 | ignore_rest_of_line (); |
cdfbf930 RH |
938 | return; |
939 | } | |
940 | ||
941 | /* If the last address was not at the current PC, advance to current. */ | |
ae424f82 JJ |
942 | if (symbol_get_frag (frchain_now->frch_cfi_data->last_address) != frag_now |
943 | || S_GET_VALUE (frchain_now->frch_cfi_data->last_address) | |
944 | != frag_now_fix ()) | |
cdfbf930 RH |
945 | cfi_add_advance_loc (symbol_temp_new_now ()); |
946 | ||
947 | tail = &head; | |
948 | do | |
949 | { | |
1e9cc1c2 | 950 | e = (struct cfi_escape_data *) xmalloc (sizeof (*e)); |
cdfbf930 RH |
951 | do_parse_cons_expression (&e->exp, 1); |
952 | *tail = e; | |
953 | tail = &e->next; | |
954 | } | |
955 | while (*input_line_pointer++ == ','); | |
956 | *tail = NULL; | |
957 | ||
958 | insn = alloc_cfi_insn_data (); | |
959 | insn->insn = CFI_escape; | |
960 | insn->u.esc = head; | |
7c9c8381 JB |
961 | |
962 | --input_line_pointer; | |
963 | demand_empty_rest_of_line (); | |
cdfbf930 RH |
964 | } |
965 | ||
9b8ae42e JJ |
966 | static void |
967 | dot_cfi_personality (int ignored ATTRIBUTE_UNUSED) | |
968 | { | |
969 | struct fde_entry *fde; | |
970 | offsetT encoding; | |
971 | ||
972 | if (frchain_now->frch_cfi_data == NULL) | |
973 | { | |
974 | as_bad (_("CFI instruction used without previous .cfi_startproc")); | |
975 | ignore_rest_of_line (); | |
976 | return; | |
977 | } | |
978 | ||
979 | fde = frchain_now->frch_cfi_data->cur_fde_data; | |
f1c4cc75 | 980 | encoding = cfi_parse_const (); |
9b8ae42e JJ |
981 | if (encoding == DW_EH_PE_omit) |
982 | { | |
983 | demand_empty_rest_of_line (); | |
984 | fde->per_encoding = encoding; | |
985 | return; | |
986 | } | |
987 | ||
988 | if ((encoding & 0xff) != encoding | |
2f0c68f2 | 989 | || ((((encoding & 0x70) != 0 |
3dd24306 | 990 | #if CFI_DIFF_EXPR_OK || defined tc_cfi_emit_pcrel_expr |
2f0c68f2 | 991 | && (encoding & 0x70) != DW_EH_PE_pcrel |
9b8ae42e JJ |
992 | #endif |
993 | ) | |
994 | /* leb128 can be handled, but does something actually need it? */ | |
2f0c68f2 CM |
995 | || (encoding & 7) == DW_EH_PE_uleb128 |
996 | || (encoding & 7) > DW_EH_PE_udata8) | |
997 | && tc_cfi_reloc_for_encoding (encoding) == BFD_RELOC_NONE)) | |
9b8ae42e JJ |
998 | { |
999 | as_bad (_("invalid or unsupported encoding in .cfi_personality")); | |
1000 | ignore_rest_of_line (); | |
1001 | return; | |
1002 | } | |
1003 | ||
1004 | if (*input_line_pointer++ != ',') | |
1005 | { | |
1006 | as_bad (_(".cfi_personality requires encoding and symbol arguments")); | |
1007 | ignore_rest_of_line (); | |
1008 | return; | |
1009 | } | |
1010 | ||
1011 | expression_and_evaluate (&fde->personality); | |
1012 | switch (fde->personality.X_op) | |
1013 | { | |
1014 | case O_symbol: | |
1015 | break; | |
1016 | case O_constant: | |
1017 | if ((encoding & 0x70) == DW_EH_PE_pcrel) | |
1018 | encoding = DW_EH_PE_omit; | |
1019 | break; | |
1020 | default: | |
1021 | encoding = DW_EH_PE_omit; | |
1022 | break; | |
1023 | } | |
1024 | ||
1025 | fde->per_encoding = encoding; | |
1026 | ||
1027 | if (encoding == DW_EH_PE_omit) | |
1028 | { | |
1029 | as_bad (_("wrong second argument to .cfi_personality")); | |
1030 | ignore_rest_of_line (); | |
1031 | return; | |
1032 | } | |
1033 | ||
1034 | demand_empty_rest_of_line (); | |
1035 | } | |
1036 | ||
1037 | static void | |
1038 | dot_cfi_lsda (int ignored ATTRIBUTE_UNUSED) | |
1039 | { | |
1040 | struct fde_entry *fde; | |
1041 | offsetT encoding; | |
1042 | ||
1043 | if (frchain_now->frch_cfi_data == NULL) | |
1044 | { | |
1045 | as_bad (_("CFI instruction used without previous .cfi_startproc")); | |
1046 | ignore_rest_of_line (); | |
1047 | return; | |
1048 | } | |
1049 | ||
1050 | fde = frchain_now->frch_cfi_data->cur_fde_data; | |
f1c4cc75 | 1051 | encoding = cfi_parse_const (); |
9b8ae42e JJ |
1052 | if (encoding == DW_EH_PE_omit) |
1053 | { | |
1054 | demand_empty_rest_of_line (); | |
1055 | fde->lsda_encoding = encoding; | |
1056 | return; | |
1057 | } | |
1058 | ||
1059 | if ((encoding & 0xff) != encoding | |
2f0c68f2 | 1060 | || ((((encoding & 0x70) != 0 |
2c678708 | 1061 | #if CFI_DIFF_LSDA_OK || defined tc_cfi_emit_pcrel_expr |
2f0c68f2 | 1062 | && (encoding & 0x70) != DW_EH_PE_pcrel |
9b8ae42e | 1063 | #endif |
2f0c68f2 | 1064 | ) |
9b8ae42e | 1065 | /* leb128 can be handled, but does something actually need it? */ |
2f0c68f2 CM |
1066 | || (encoding & 7) == DW_EH_PE_uleb128 |
1067 | || (encoding & 7) > DW_EH_PE_udata8) | |
1068 | && tc_cfi_reloc_for_encoding (encoding) == BFD_RELOC_NONE)) | |
9b8ae42e JJ |
1069 | { |
1070 | as_bad (_("invalid or unsupported encoding in .cfi_lsda")); | |
1071 | ignore_rest_of_line (); | |
1072 | return; | |
1073 | } | |
1074 | ||
1075 | if (*input_line_pointer++ != ',') | |
1076 | { | |
1077 | as_bad (_(".cfi_lsda requires encoding and symbol arguments")); | |
1078 | ignore_rest_of_line (); | |
1079 | return; | |
1080 | } | |
1081 | ||
1082 | fde->lsda_encoding = encoding; | |
1083 | ||
1084 | expression_and_evaluate (&fde->lsda); | |
1085 | switch (fde->lsda.X_op) | |
1086 | { | |
1087 | case O_symbol: | |
1088 | break; | |
1089 | case O_constant: | |
1090 | if ((encoding & 0x70) == DW_EH_PE_pcrel) | |
1091 | encoding = DW_EH_PE_omit; | |
1092 | break; | |
1093 | default: | |
1094 | encoding = DW_EH_PE_omit; | |
1095 | break; | |
1096 | } | |
1097 | ||
1098 | fde->lsda_encoding = encoding; | |
1099 | ||
1100 | if (encoding == DW_EH_PE_omit) | |
1101 | { | |
1102 | as_bad (_("wrong second argument to .cfi_lsda")); | |
1103 | ignore_rest_of_line (); | |
1104 | return; | |
1105 | } | |
1106 | ||
1107 | demand_empty_rest_of_line (); | |
1108 | } | |
1109 | ||
f1c4cc75 RH |
1110 | static void |
1111 | dot_cfi_val_encoded_addr (int ignored ATTRIBUTE_UNUSED) | |
1112 | { | |
1113 | struct cfi_insn_data *insn_ptr; | |
1114 | offsetT encoding; | |
1115 | ||
1116 | if (frchain_now->frch_cfi_data == NULL) | |
1117 | { | |
1118 | as_bad (_("CFI instruction used without previous .cfi_startproc")); | |
1119 | ignore_rest_of_line (); | |
1120 | return; | |
1121 | } | |
1122 | ||
1123 | /* If the last address was not at the current PC, advance to current. */ | |
1124 | if (symbol_get_frag (frchain_now->frch_cfi_data->last_address) != frag_now | |
1125 | || S_GET_VALUE (frchain_now->frch_cfi_data->last_address) | |
1126 | != frag_now_fix ()) | |
1127 | cfi_add_advance_loc (symbol_temp_new_now ()); | |
1128 | ||
1129 | insn_ptr = alloc_cfi_insn_data (); | |
1130 | insn_ptr->insn = CFI_val_encoded_addr; | |
72b016b4 | 1131 | |
f1c4cc75 RH |
1132 | insn_ptr->u.ea.reg = cfi_parse_reg (); |
1133 | ||
1134 | cfi_parse_separator (); | |
1135 | encoding = cfi_parse_const (); | |
1136 | if ((encoding & 0xff) != encoding | |
1137 | || ((encoding & 0x70) != 0 | |
1138 | #if CFI_DIFF_EXPR_OK || defined tc_cfi_emit_pcrel_expr | |
1139 | && (encoding & 0x70) != DW_EH_PE_pcrel | |
1140 | #endif | |
1141 | ) | |
1142 | /* leb128 can be handled, but does something actually need it? */ | |
1143 | || (encoding & 7) == DW_EH_PE_uleb128 | |
1144 | || (encoding & 7) > DW_EH_PE_udata8) | |
1145 | { | |
1146 | as_bad (_("invalid or unsupported encoding in .cfi_lsda")); | |
1147 | encoding = DW_EH_PE_omit; | |
1148 | } | |
1149 | ||
1150 | cfi_parse_separator (); | |
1151 | expression_and_evaluate (&insn_ptr->u.ea.exp); | |
1152 | switch (insn_ptr->u.ea.exp.X_op) | |
1153 | { | |
1154 | case O_symbol: | |
1155 | break; | |
1156 | case O_constant: | |
1157 | if ((encoding & 0x70) != DW_EH_PE_pcrel) | |
83e12deb | 1158 | break; |
f1c4cc75 RH |
1159 | default: |
1160 | encoding = DW_EH_PE_omit; | |
1161 | break; | |
1162 | } | |
1163 | ||
1164 | insn_ptr->u.ea.encoding = encoding; | |
1165 | if (encoding == DW_EH_PE_omit) | |
1166 | { | |
1167 | as_bad (_("wrong third argument to .cfi_val_encoded_addr")); | |
1168 | ignore_rest_of_line (); | |
1169 | return; | |
1170 | } | |
1171 | ||
1172 | demand_empty_rest_of_line (); | |
1173 | } | |
1174 | ||
69602580 JB |
1175 | static void |
1176 | dot_cfi_label (int ignored ATTRIBUTE_UNUSED) | |
1177 | { | |
1178 | char *name = read_symbol_name (); | |
1179 | ||
1180 | if (name == NULL) | |
1181 | return; | |
1182 | ||
1183 | /* If the last address was not at the current PC, advance to current. */ | |
1184 | if (symbol_get_frag (frchain_now->frch_cfi_data->last_address) != frag_now | |
1185 | || S_GET_VALUE (frchain_now->frch_cfi_data->last_address) | |
1186 | != frag_now_fix ()) | |
1187 | cfi_add_advance_loc (symbol_temp_new_now ()); | |
1188 | ||
1189 | cfi_add_label (name); | |
92e18d93 | 1190 | free (name); |
69602580 JB |
1191 | |
1192 | demand_empty_rest_of_line (); | |
1193 | } | |
1194 | ||
38462edf JJ |
1195 | static void |
1196 | dot_cfi_sections (int ignored ATTRIBUTE_UNUSED) | |
1197 | { | |
1198 | int sections = 0; | |
1199 | ||
1200 | SKIP_WHITESPACE (); | |
d02603dc | 1201 | if (is_name_beginner (*input_line_pointer) || *input_line_pointer == '"') |
38462edf JJ |
1202 | while (1) |
1203 | { | |
d02603dc | 1204 | char * saved_ilp; |
38462edf JJ |
1205 | char *name, c; |
1206 | ||
d02603dc NC |
1207 | saved_ilp = input_line_pointer; |
1208 | c = get_symbol_name (& name); | |
38462edf | 1209 | |
72b016b4 NC |
1210 | if (strncmp (name, ".eh_frame", sizeof ".eh_frame") == 0 |
1211 | && name[9] != '_') | |
38462edf | 1212 | sections |= CFI_EMIT_eh_frame; |
72b016b4 | 1213 | else if (strncmp (name, ".debug_frame", sizeof ".debug_frame") == 0) |
38462edf | 1214 | sections |= CFI_EMIT_debug_frame; |
2f0c68f2 CM |
1215 | #if SUPPORT_COMPACT_EH |
1216 | else if (strncmp (name, ".eh_frame_entry", sizeof ".eh_frame_entry") == 0) | |
1217 | { | |
1218 | compact_eh = TRUE; | |
1219 | sections |= CFI_EMIT_eh_frame_compact; | |
1220 | } | |
1221 | #endif | |
1bce6bd8 PB |
1222 | #ifdef tc_cfi_section_name |
1223 | else if (strcmp (name, tc_cfi_section_name) == 0) | |
1224 | sections |= CFI_EMIT_target; | |
1225 | #endif | |
38462edf JJ |
1226 | else |
1227 | { | |
1228 | *input_line_pointer = c; | |
d02603dc | 1229 | input_line_pointer = saved_ilp; |
38462edf JJ |
1230 | break; |
1231 | } | |
1232 | ||
1233 | *input_line_pointer = c; | |
d02603dc | 1234 | SKIP_WHITESPACE_AFTER_NAME (); |
38462edf JJ |
1235 | if (*input_line_pointer == ',') |
1236 | { | |
1237 | name = input_line_pointer++; | |
1238 | SKIP_WHITESPACE (); | |
d02603dc | 1239 | if (!is_name_beginner (*input_line_pointer) && *input_line_pointer != '"') |
38462edf JJ |
1240 | { |
1241 | input_line_pointer = name; | |
1242 | break; | |
1243 | } | |
1244 | } | |
d02603dc | 1245 | else if (is_name_beginner (*input_line_pointer) || *input_line_pointer == '"') |
38462edf JJ |
1246 | break; |
1247 | } | |
1248 | ||
1249 | demand_empty_rest_of_line (); | |
2f0c68f2 CM |
1250 | if (cfi_sections_set && cfi_sections != sections) |
1251 | as_bad (_("inconsistent uses of .cfi_sections")); | |
38462edf JJ |
1252 | cfi_sections = sections; |
1253 | } | |
1254 | ||
54cfded0 | 1255 | static void |
a4447b93 | 1256 | dot_cfi_startproc (int ignored ATTRIBUTE_UNUSED) |
54cfded0 | 1257 | { |
a4447b93 | 1258 | int simple = 0; |
39b82151 | 1259 | |
ae424f82 | 1260 | if (frchain_now->frch_cfi_data != NULL) |
54cfded0 AM |
1261 | { |
1262 | as_bad (_("previous CFI entry not closed (missing .cfi_endproc)")); | |
7c9c8381 | 1263 | ignore_rest_of_line (); |
54cfded0 AM |
1264 | return; |
1265 | } | |
1266 | ||
a4447b93 | 1267 | cfi_new_fde (symbol_temp_new_now ()); |
39b82151 | 1268 | |
a4447b93 | 1269 | SKIP_WHITESPACE (); |
d02603dc | 1270 | if (is_name_beginner (*input_line_pointer) || *input_line_pointer == '"') |
a4447b93 | 1271 | { |
d02603dc | 1272 | char * saved_ilp = input_line_pointer; |
a4447b93 | 1273 | char *name, c; |
54cfded0 | 1274 | |
d02603dc | 1275 | c = get_symbol_name (& name); |
54cfded0 | 1276 | |
a4447b93 RH |
1277 | if (strcmp (name, "simple") == 0) |
1278 | { | |
1279 | simple = 1; | |
d02603dc | 1280 | restore_line_pointer (c); |
a4447b93 RH |
1281 | } |
1282 | else | |
d02603dc | 1283 | input_line_pointer = saved_ilp; |
a4447b93 RH |
1284 | } |
1285 | demand_empty_rest_of_line (); | |
1286 | ||
bd5608dc | 1287 | cfi_sections_set = TRUE; |
2f0c68f2 CM |
1288 | all_cfi_sections |= cfi_sections; |
1289 | cfi_set_sections (); | |
ae424f82 | 1290 | frchain_now->frch_cfi_data->cur_cfa_offset = 0; |
a4447b93 | 1291 | if (!simple) |
39b82151 | 1292 | tc_cfi_frame_initial_instructions (); |
1bce6bd8 PB |
1293 | |
1294 | if ((cfi_sections & CFI_EMIT_target) != 0) | |
1295 | tc_cfi_startproc (); | |
54cfded0 AM |
1296 | } |
1297 | ||
a4447b93 RH |
1298 | static void |
1299 | dot_cfi_endproc (int ignored ATTRIBUTE_UNUSED) | |
1300 | { | |
ae424f82 | 1301 | if (frchain_now->frch_cfi_data == NULL) |
a4447b93 RH |
1302 | { |
1303 | as_bad (_(".cfi_endproc without corresponding .cfi_startproc")); | |
7c9c8381 | 1304 | ignore_rest_of_line (); |
a4447b93 RH |
1305 | return; |
1306 | } | |
54cfded0 | 1307 | |
2f0c68f2 | 1308 | last_fde = frchain_now->frch_cfi_data->cur_fde_data; |
1bce6bd8 | 1309 | |
a4447b93 | 1310 | cfi_end_fde (symbol_temp_new_now ()); |
7c9c8381 JB |
1311 | |
1312 | demand_empty_rest_of_line (); | |
1bce6bd8 | 1313 | |
bd5608dc | 1314 | cfi_sections_set = TRUE; |
1bce6bd8 | 1315 | if ((cfi_sections & CFI_EMIT_target) != 0) |
2f0c68f2 | 1316 | tc_cfi_endproc (last_fde); |
a4447b93 | 1317 | } |
39b82151 | 1318 | |
2f0c68f2 CM |
1319 | static segT |
1320 | get_cfi_seg (segT cseg, const char *base, flagword flags, int align) | |
54cfded0 | 1321 | { |
2f0c68f2 CM |
1322 | /* Exclude .debug_frame sections for Compact EH. */ |
1323 | if (SUPPORT_FRAME_LINKONCE || ((flags & SEC_DEBUGGING) == 0 && compact_eh)) | |
1324 | { | |
1325 | struct dwcfi_seg_list *l; | |
1326 | ||
1327 | l = dwcfi_hash_find_or_make (cseg, base, flags); | |
1328 | ||
1329 | cseg = l->seg; | |
1330 | subseg_set (cseg, l->subseg); | |
1331 | } | |
1332 | else | |
1333 | { | |
1334 | cseg = subseg_new (base, 0); | |
1335 | bfd_set_section_flags (stdoutput, cseg, flags); | |
1336 | } | |
1337 | record_alignment (cseg, align); | |
1338 | return cseg; | |
a4447b93 | 1339 | } |
54cfded0 | 1340 | |
2f0c68f2 CM |
1341 | #if SUPPORT_COMPACT_EH |
1342 | static void | |
1343 | dot_cfi_personality_id (int ignored ATTRIBUTE_UNUSED) | |
1344 | { | |
1345 | struct fde_entry *fde; | |
54cfded0 | 1346 | |
2f0c68f2 CM |
1347 | if (frchain_now->frch_cfi_data == NULL) |
1348 | { | |
1349 | as_bad (_("CFI instruction used without previous .cfi_startproc")); | |
1350 | ignore_rest_of_line (); | |
1351 | return; | |
1352 | } | |
1353 | ||
1354 | fde = frchain_now->frch_cfi_data->cur_fde_data; | |
1355 | fde->personality_id = cfi_parse_const (); | |
1356 | demand_empty_rest_of_line (); | |
1357 | ||
1358 | if (fde->personality_id == 0 || fde->personality_id > 3) | |
1359 | { | |
1360 | as_bad (_("wrong argument to .cfi_personality_id")); | |
1361 | return; | |
1362 | } | |
1363 | } | |
1364 | ||
1365 | static void | |
1366 | dot_cfi_fde_data (int ignored ATTRIBUTE_UNUSED) | |
a4447b93 | 1367 | { |
2f0c68f2 CM |
1368 | if (frchain_now->frch_cfi_data == NULL) |
1369 | { | |
1370 | as_bad (_(".cfi_fde_data without corresponding .cfi_startproc")); | |
1371 | ignore_rest_of_line (); | |
1372 | return; | |
1373 | } | |
1374 | ||
1375 | last_fde = frchain_now->frch_cfi_data->cur_fde_data; | |
1376 | ||
bd5608dc | 1377 | cfi_sections_set = TRUE; |
2f0c68f2 CM |
1378 | if ((cfi_sections & CFI_EMIT_target) != 0 |
1379 | || (cfi_sections & CFI_EMIT_eh_frame_compact) != 0) | |
1380 | { | |
1381 | struct cfi_escape_data *head, **tail, *e; | |
1382 | int num_ops = 0; | |
1383 | ||
1384 | tail = &head; | |
1385 | if (!is_it_end_of_statement ()) | |
1386 | { | |
1387 | num_ops = 0; | |
1388 | do | |
1389 | { | |
1390 | e = (struct cfi_escape_data *) xmalloc (sizeof (*e)); | |
1391 | do_parse_cons_expression (&e->exp, 1); | |
1392 | *tail = e; | |
1393 | tail = &e->next; | |
1394 | num_ops++; | |
1395 | } | |
1396 | while (*input_line_pointer++ == ','); | |
1397 | --input_line_pointer; | |
1398 | } | |
1399 | *tail = NULL; | |
1400 | ||
1401 | if (last_fde->lsda_encoding != DW_EH_PE_omit) | |
1402 | last_fde->eh_header_type = EH_COMPACT_HAS_LSDA; | |
1403 | else if (num_ops <= 3 && last_fde->per_encoding == DW_EH_PE_omit) | |
1404 | last_fde->eh_header_type = EH_COMPACT_INLINE; | |
1405 | else | |
1406 | last_fde->eh_header_type = EH_COMPACT_OUTLINE; | |
1407 | ||
1408 | if (last_fde->eh_header_type == EH_COMPACT_INLINE) | |
1409 | num_ops = 3; | |
1410 | ||
1411 | last_fde->eh_data_size = num_ops; | |
1412 | last_fde->eh_data = (bfd_byte *) xmalloc (num_ops); | |
1413 | num_ops = 0; | |
1414 | while (head) | |
1415 | { | |
1416 | e = head; | |
1417 | head = e->next; | |
1418 | last_fde->eh_data[num_ops++] = e->exp.X_add_number; | |
1419 | free (e); | |
1420 | } | |
1421 | if (last_fde->eh_header_type == EH_COMPACT_INLINE) | |
1422 | while (num_ops < 3) | |
1423 | last_fde->eh_data[num_ops++] = tc_compact_eh_opcode_stop; | |
1424 | } | |
1425 | ||
1426 | demand_empty_rest_of_line (); | |
a4447b93 | 1427 | } |
54cfded0 | 1428 | |
2f0c68f2 CM |
1429 | /* Function to emit the compact unwinding opcodes stored in the |
1430 | fde's eh_data field. The end of the opcode data will be | |
1431 | padded to the value in align. */ | |
54cfded0 | 1432 | |
2f0c68f2 CM |
1433 | static void |
1434 | output_compact_unwind_data (struct fde_entry *fde, int align) | |
a4447b93 | 1435 | { |
2f0c68f2 CM |
1436 | int data_size = fde->eh_data_size + 2; |
1437 | int align_padding; | |
1438 | int amask; | |
1439 | char *p; | |
1440 | ||
1441 | fde->eh_loc = symbol_temp_new_now (); | |
1442 | ||
1443 | p = frag_more (1); | |
1444 | if (fde->personality_id != 0) | |
1445 | *p = fde->personality_id; | |
1446 | else if (fde->per_encoding != DW_EH_PE_omit) | |
1447 | { | |
1448 | *p = 0; | |
1449 | emit_expr_encoded (&fde->personality, fde->per_encoding, FALSE); | |
1450 | data_size += encoding_size (fde->per_encoding); | |
1451 | } | |
1452 | else | |
1453 | *p = 1; | |
1454 | ||
1455 | amask = (1 << align) - 1; | |
1456 | align_padding = ((data_size + amask) & ~amask) - data_size; | |
1457 | ||
1458 | p = frag_more (fde->eh_data_size + 1 + align_padding); | |
1459 | memcpy (p, fde->eh_data, fde->eh_data_size); | |
1460 | p += fde->eh_data_size; | |
1461 | ||
1462 | while (align_padding-- > 0) | |
1463 | *(p++) = tc_compact_eh_opcode_pad; | |
1464 | ||
1465 | *(p++) = tc_compact_eh_opcode_stop; | |
1466 | fde->eh_header_type = EH_COMPACT_OUTLINE_DONE; | |
a4447b93 RH |
1467 | } |
1468 | ||
2f0c68f2 CM |
1469 | /* Handle the .cfi_inline_lsda directive. */ |
1470 | static void | |
1471 | dot_cfi_inline_lsda (int ignored ATTRIBUTE_UNUSED) | |
1472 | { | |
1473 | segT ccseg; | |
1474 | int align; | |
1475 | long max_alignment = 28; | |
1476 | ||
1477 | if (!last_fde) | |
1478 | { | |
1479 | as_bad (_("unexpected .cfi_inline_lsda")); | |
1480 | ignore_rest_of_line (); | |
1481 | return; | |
1482 | } | |
1483 | ||
1484 | if ((last_fde->sections & CFI_EMIT_eh_frame_compact) == 0) | |
1485 | { | |
1486 | as_bad (_(".cfi_inline_lsda not valid for this frame")); | |
1487 | ignore_rest_of_line (); | |
1488 | return; | |
1489 | } | |
1490 | ||
1491 | if (last_fde->eh_header_type != EH_COMPACT_UNKNOWN | |
1492 | && last_fde->eh_header_type != EH_COMPACT_HAS_LSDA) | |
1493 | { | |
1494 | as_bad (_(".cfi_inline_lsda seen for frame without .cfi_lsda")); | |
1495 | ignore_rest_of_line (); | |
1496 | return; | |
1497 | } | |
1498 | ||
1499 | #ifdef md_flush_pending_output | |
1500 | md_flush_pending_output (); | |
1501 | #endif | |
1502 | ||
1503 | align = get_absolute_expression (); | |
1504 | if (align > max_alignment) | |
1505 | { | |
1506 | align = max_alignment; | |
1507 | as_bad (_("Alignment too large: %d. assumed."), align); | |
1508 | } | |
1509 | else if (align < 0) | |
1510 | { | |
1511 | as_warn (_("Alignment negative: 0 assumed.")); | |
1512 | align = 0; | |
1513 | } | |
1514 | ||
1515 | demand_empty_rest_of_line (); | |
1516 | ccseg = CUR_SEG (last_fde); | |
54cfded0 | 1517 | |
2f0c68f2 CM |
1518 | /* Open .gnu_extab section. */ |
1519 | get_cfi_seg (ccseg, ".gnu_extab", | |
1520 | (SEC_ALLOC | SEC_LOAD | SEC_DATA | |
1521 | | DWARF2_EH_FRAME_READ_ONLY), | |
1522 | 1); | |
1523 | ||
1524 | frag_align (align, 0, 0); | |
1525 | record_alignment (now_seg, align); | |
1526 | if (last_fde->eh_header_type == EH_COMPACT_HAS_LSDA) | |
1527 | output_compact_unwind_data (last_fde, align); | |
1528 | ||
1529 | last_fde = NULL; | |
1530 | ||
1531 | return; | |
1532 | } | |
1533 | #else /* !SUPPORT_COMPACT_EH */ | |
a4447b93 | 1534 | static void |
2f0c68f2 | 1535 | dot_cfi_inline_lsda (int ignored ATTRIBUTE_UNUSED) |
a4447b93 | 1536 | { |
2f0c68f2 CM |
1537 | as_bad (_(".cfi_inline_lsda is not supported for this target")); |
1538 | ignore_rest_of_line (); | |
54cfded0 AM |
1539 | } |
1540 | ||
a4447b93 | 1541 | static void |
2f0c68f2 | 1542 | dot_cfi_fde_data (int ignored ATTRIBUTE_UNUSED) |
54cfded0 | 1543 | { |
2f0c68f2 CM |
1544 | as_bad (_(".cfi_fde_data is not supported for this target")); |
1545 | ignore_rest_of_line (); | |
a4447b93 | 1546 | } |
54cfded0 | 1547 | |
2f0c68f2 CM |
1548 | static void |
1549 | dot_cfi_personality_id (int ignored ATTRIBUTE_UNUSED) | |
1550 | { | |
1551 | as_bad (_(".cfi_personality_id is not supported for this target")); | |
1552 | ignore_rest_of_line (); | |
1553 | } | |
1554 | #endif | |
1555 | \f | |
a4447b93 RH |
1556 | static void |
1557 | output_cfi_insn (struct cfi_insn_data *insn) | |
1558 | { | |
1559 | offsetT offset; | |
1560 | unsigned int regno; | |
54cfded0 | 1561 | |
a4447b93 | 1562 | switch (insn->insn) |
54cfded0 | 1563 | { |
a4447b93 RH |
1564 | case DW_CFA_advance_loc: |
1565 | { | |
1566 | symbolS *from = insn->u.ll.lab1; | |
1567 | symbolS *to = insn->u.ll.lab2; | |
1568 | ||
1569 | if (symbol_get_frag (to) == symbol_get_frag (from)) | |
1570 | { | |
1571 | addressT delta = S_GET_VALUE (to) - S_GET_VALUE (from); | |
1572 | addressT scaled = delta / DWARF2_LINE_MIN_INSN_LENGTH; | |
1573 | ||
1574 | if (scaled <= 0x3F) | |
1575 | out_one (DW_CFA_advance_loc + scaled); | |
395e8345 | 1576 | else if (scaled <= 0xFF) |
a4447b93 | 1577 | { |
9b8ae42e | 1578 | out_one (DW_CFA_advance_loc1); |
395e8345 | 1579 | out_one (scaled); |
a4447b93 | 1580 | } |
395e8345 | 1581 | else if (scaled <= 0xFFFF) |
a4447b93 | 1582 | { |
9b8ae42e | 1583 | out_one (DW_CFA_advance_loc2); |
395e8345 | 1584 | out_two (scaled); |
a4447b93 RH |
1585 | } |
1586 | else | |
1587 | { | |
9b8ae42e | 1588 | out_one (DW_CFA_advance_loc4); |
395e8345 | 1589 | out_four (scaled); |
a4447b93 RH |
1590 | } |
1591 | } | |
1592 | else | |
1593 | { | |
1594 | expressionS exp; | |
1595 | ||
1596 | exp.X_op = O_subtract; | |
1597 | exp.X_add_symbol = to; | |
1598 | exp.X_op_symbol = from; | |
1599 | exp.X_add_number = 0; | |
1600 | ||
1601 | /* The code in ehopt.c expects that one byte of the encoding | |
1602 | is already allocated to the frag. This comes from the way | |
1603 | that it scans the .eh_frame section looking first for the | |
1604 | .byte DW_CFA_advance_loc4. */ | |
1fbfe785 | 1605 | *frag_more (1) = DW_CFA_advance_loc4; |
a4447b93 RH |
1606 | |
1607 | frag_var (rs_cfa, 4, 0, DWARF2_LINE_MIN_INSN_LENGTH << 3, | |
1608 | make_expr_symbol (&exp), frag_now_fix () - 1, | |
1609 | (char *) frag_now); | |
1610 | } | |
1611 | } | |
1612 | break; | |
1613 | ||
1614 | case DW_CFA_def_cfa: | |
1615 | offset = insn->u.ri.offset; | |
1616 | if (offset < 0) | |
54cfded0 | 1617 | { |
a4447b93 RH |
1618 | out_one (DW_CFA_def_cfa_sf); |
1619 | out_uleb128 (insn->u.ri.reg); | |
dcb45a06 | 1620 | out_sleb128 (offset / DWARF2_CIE_DATA_ALIGNMENT); |
54cfded0 AM |
1621 | } |
1622 | else | |
1623 | { | |
a4447b93 RH |
1624 | out_one (DW_CFA_def_cfa); |
1625 | out_uleb128 (insn->u.ri.reg); | |
1626 | out_uleb128 (offset); | |
54cfded0 AM |
1627 | } |
1628 | break; | |
1629 | ||
a4447b93 | 1630 | case DW_CFA_def_cfa_register: |
2be24b54 ML |
1631 | case DW_CFA_undefined: |
1632 | case DW_CFA_same_value: | |
1633 | out_one (insn->insn); | |
1634 | out_uleb128 (insn->u.r); | |
54cfded0 AM |
1635 | break; |
1636 | ||
a4447b93 RH |
1637 | case DW_CFA_def_cfa_offset: |
1638 | offset = insn->u.i; | |
1639 | if (offset < 0) | |
1640 | { | |
1641 | out_one (DW_CFA_def_cfa_offset_sf); | |
dcb45a06 | 1642 | out_sleb128 (offset / DWARF2_CIE_DATA_ALIGNMENT); |
a4447b93 RH |
1643 | } |
1644 | else | |
1645 | { | |
1646 | out_one (DW_CFA_def_cfa_offset); | |
1647 | out_uleb128 (offset); | |
1648 | } | |
54cfded0 AM |
1649 | break; |
1650 | ||
2be24b54 ML |
1651 | case DW_CFA_restore: |
1652 | regno = insn->u.r; | |
1653 | if (regno <= 0x3F) | |
1654 | { | |
1655 | out_one (DW_CFA_restore + regno); | |
1656 | } | |
1657 | else | |
1658 | { | |
1659 | out_one (DW_CFA_restore_extended); | |
1660 | out_uleb128 (regno); | |
1661 | } | |
1662 | break; | |
1663 | ||
a4447b93 RH |
1664 | case DW_CFA_offset: |
1665 | regno = insn->u.ri.reg; | |
1666 | offset = insn->u.ri.offset / DWARF2_CIE_DATA_ALIGNMENT; | |
1667 | if (offset < 0) | |
1668 | { | |
1233ae62 | 1669 | out_one (DW_CFA_offset_extended_sf); |
a4447b93 RH |
1670 | out_uleb128 (regno); |
1671 | out_sleb128 (offset); | |
1672 | } | |
1673 | else if (regno <= 0x3F) | |
1674 | { | |
1675 | out_one (DW_CFA_offset + regno); | |
1676 | out_uleb128 (offset); | |
1677 | } | |
54cfded0 AM |
1678 | else |
1679 | { | |
a4447b93 RH |
1680 | out_one (DW_CFA_offset_extended); |
1681 | out_uleb128 (regno); | |
1682 | out_uleb128 (offset); | |
54cfded0 | 1683 | } |
54cfded0 AM |
1684 | break; |
1685 | ||
a4447b93 RH |
1686 | case DW_CFA_register: |
1687 | out_one (DW_CFA_register); | |
1688 | out_uleb128 (insn->u.rr.reg1); | |
1689 | out_uleb128 (insn->u.rr.reg2); | |
39b82151 ML |
1690 | break; |
1691 | ||
2be24b54 ML |
1692 | case DW_CFA_remember_state: |
1693 | case DW_CFA_restore_state: | |
2be24b54 | 1694 | out_one (insn->insn); |
54cfded0 AM |
1695 | break; |
1696 | ||
364b6d8b JJ |
1697 | case DW_CFA_GNU_window_save: |
1698 | out_one (DW_CFA_GNU_window_save); | |
1699 | break; | |
1700 | ||
cdfbf930 RH |
1701 | case CFI_escape: |
1702 | { | |
1703 | struct cfi_escape_data *e; | |
1704 | for (e = insn->u.esc; e ; e = e->next) | |
1705 | emit_expr (&e->exp, 1); | |
1706 | break; | |
1707 | } | |
1708 | ||
f1c4cc75 RH |
1709 | case CFI_val_encoded_addr: |
1710 | { | |
83e12deb | 1711 | unsigned encoding = insn->u.ea.encoding; |
2f0c68f2 | 1712 | offsetT enc_size; |
f1c4cc75 RH |
1713 | |
1714 | if (encoding == DW_EH_PE_omit) | |
1715 | break; | |
1716 | out_one (DW_CFA_val_expression); | |
1717 | out_uleb128 (insn->u.ea.reg); | |
1718 | ||
83e12deb | 1719 | switch (encoding & 0x7) |
f1c4cc75 RH |
1720 | { |
1721 | case DW_EH_PE_absptr: | |
2f0c68f2 | 1722 | enc_size = DWARF2_ADDR_SIZE (stdoutput); |
f1c4cc75 RH |
1723 | break; |
1724 | case DW_EH_PE_udata2: | |
2f0c68f2 | 1725 | enc_size = 2; |
f1c4cc75 RH |
1726 | break; |
1727 | case DW_EH_PE_udata4: | |
2f0c68f2 | 1728 | enc_size = 4; |
f1c4cc75 RH |
1729 | break; |
1730 | case DW_EH_PE_udata8: | |
2f0c68f2 | 1731 | enc_size = 8; |
f1c4cc75 RH |
1732 | break; |
1733 | default: | |
1734 | abort (); | |
1735 | } | |
1736 | ||
1737 | /* If the user has requested absolute encoding, | |
1738 | then use the smaller DW_OP_addr encoding. */ | |
1739 | if (insn->u.ea.encoding == DW_EH_PE_absptr) | |
1740 | { | |
2f0c68f2 | 1741 | out_uleb128 (1 + enc_size); |
f1c4cc75 RH |
1742 | out_one (DW_OP_addr); |
1743 | } | |
1744 | else | |
1745 | { | |
2f0c68f2 | 1746 | out_uleb128 (1 + 1 + enc_size); |
f1c4cc75 RH |
1747 | out_one (DW_OP_GNU_encoded_addr); |
1748 | out_one (encoding); | |
1749 | ||
1750 | if ((encoding & 0x70) == DW_EH_PE_pcrel) | |
1751 | { | |
1752 | #if CFI_DIFF_EXPR_OK | |
1753 | insn->u.ea.exp.X_op = O_subtract; | |
1754 | insn->u.ea.exp.X_op_symbol = symbol_temp_new_now (); | |
1755 | #elif defined (tc_cfi_emit_pcrel_expr) | |
2f0c68f2 | 1756 | tc_cfi_emit_pcrel_expr (&insn->u.ea.exp, enc_size); |
f1c4cc75 RH |
1757 | break; |
1758 | #else | |
1759 | abort (); | |
1760 | #endif | |
1761 | } | |
1762 | } | |
2f0c68f2 | 1763 | emit_expr (&insn->u.ea.exp, enc_size); |
f1c4cc75 RH |
1764 | } |
1765 | break; | |
72b016b4 | 1766 | |
69602580 JB |
1767 | case CFI_label: |
1768 | colon (insn->u.sym_name); | |
1769 | break; | |
1770 | ||
54cfded0 | 1771 | default: |
a4447b93 | 1772 | abort (); |
54cfded0 | 1773 | } |
54cfded0 AM |
1774 | } |
1775 | ||
1776 | static void | |
38462edf | 1777 | output_cie (struct cie_entry *cie, bfd_boolean eh_frame, int align) |
54cfded0 | 1778 | { |
a4447b93 | 1779 | symbolS *after_size_address, *end_address; |
7c0295b1 | 1780 | expressionS exp; |
a4447b93 | 1781 | struct cfi_insn_data *i; |
9b8ae42e | 1782 | offsetT augmentation_size; |
8c9b70b1 | 1783 | int enc; |
38462edf | 1784 | enum dwarf2_format fmt = DWARF2_FORMAT (now_seg); |
a4447b93 RH |
1785 | |
1786 | cie->start_address = symbol_temp_new_now (); | |
1787 | after_size_address = symbol_temp_make (); | |
1788 | end_address = symbol_temp_make (); | |
1789 | ||
1790 | exp.X_op = O_subtract; | |
1791 | exp.X_add_symbol = end_address; | |
1792 | exp.X_op_symbol = after_size_address; | |
1793 | exp.X_add_number = 0; | |
1794 | ||
38462edf JJ |
1795 | if (eh_frame || fmt == dwarf2_format_32bit) |
1796 | emit_expr (&exp, 4); /* Length. */ | |
1797 | else | |
1798 | { | |
1799 | if (fmt == dwarf2_format_64bit) | |
1800 | out_four (-1); | |
1801 | emit_expr (&exp, 8); /* Length. */ | |
1802 | } | |
a4447b93 | 1803 | symbol_set_value_now (after_size_address); |
38462edf JJ |
1804 | if (eh_frame) |
1805 | out_four (0); /* CIE id. */ | |
1806 | else | |
1807 | { | |
1808 | out_four (-1); /* CIE id. */ | |
1809 | if (fmt != dwarf2_format_32bit) | |
1810 | out_four (-1); | |
1811 | } | |
289040ca | 1812 | out_one (DW_CIE_VERSION); /* Version. */ |
38462edf JJ |
1813 | if (eh_frame) |
1814 | { | |
1815 | out_one ('z'); /* Augmentation. */ | |
1816 | if (cie->per_encoding != DW_EH_PE_omit) | |
1817 | out_one ('P'); | |
1818 | if (cie->lsda_encoding != DW_EH_PE_omit) | |
1819 | out_one ('L'); | |
1820 | out_one ('R'); | |
38462edf | 1821 | } |
d905c788 TS |
1822 | if (cie->signal_frame) |
1823 | out_one ('S'); | |
a4447b93 | 1824 | out_one (0); |
289040ca NC |
1825 | out_uleb128 (DWARF2_LINE_MIN_INSN_LENGTH); /* Code alignment. */ |
1826 | out_sleb128 (DWARF2_CIE_DATA_ALIGNMENT); /* Data alignment. */ | |
0da76f83 NC |
1827 | if (DW_CIE_VERSION == 1) /* Return column. */ |
1828 | out_one (cie->return_column); | |
1829 | else | |
1830 | out_uleb128 (cie->return_column); | |
38462edf JJ |
1831 | if (eh_frame) |
1832 | { | |
1833 | augmentation_size = 1 + (cie->lsda_encoding != DW_EH_PE_omit); | |
1834 | if (cie->per_encoding != DW_EH_PE_omit) | |
1835 | augmentation_size += 1 + encoding_size (cie->per_encoding); | |
1836 | out_uleb128 (augmentation_size); /* Augmentation size. */ | |
4e4e1355 | 1837 | |
2f0c68f2 | 1838 | emit_expr_encoded (&cie->personality, cie->per_encoding, TRUE); |
4e4e1355 TS |
1839 | |
1840 | if (cie->lsda_encoding != DW_EH_PE_omit) | |
1841 | out_one (cie->lsda_encoding); | |
9b8ae42e | 1842 | } |
8c9b70b1 RH |
1843 | |
1844 | switch (DWARF2_FDE_RELOC_SIZE) | |
1845 | { | |
1846 | case 2: | |
1847 | enc = DW_EH_PE_sdata2; | |
1848 | break; | |
1849 | case 4: | |
1850 | enc = DW_EH_PE_sdata4; | |
1851 | break; | |
1852 | case 8: | |
1853 | enc = DW_EH_PE_sdata8; | |
1854 | break; | |
1855 | default: | |
1856 | abort (); | |
1857 | } | |
3dd24306 | 1858 | #if CFI_DIFF_EXPR_OK || defined tc_cfi_emit_pcrel_expr |
8c9b70b1 | 1859 | enc |= DW_EH_PE_pcrel; |
364b6d8b | 1860 | #endif |
2f0c68f2 CM |
1861 | #ifdef DWARF2_FDE_RELOC_ENCODING |
1862 | /* Allow target to override encoding. */ | |
1863 | enc = DWARF2_FDE_RELOC_ENCODING (enc); | |
1864 | #endif | |
1865 | cie->fde_encoding = enc; | |
38462edf JJ |
1866 | if (eh_frame) |
1867 | out_one (enc); | |
a4447b93 RH |
1868 | |
1869 | if (cie->first) | |
72b016b4 NC |
1870 | { |
1871 | for (i = cie->first; i != cie->last; i = i->next) | |
83e12deb | 1872 | { |
6303c4ae | 1873 | if (CUR_SEG (i) != CUR_SEG (cie)) |
72b016b4 NC |
1874 | continue; |
1875 | output_cfi_insn (i); | |
1876 | } | |
1877 | } | |
a4447b93 | 1878 | |
38462edf | 1879 | frag_align (align, DW_CFA_nop, 0); |
a4447b93 RH |
1880 | symbol_set_value_now (end_address); |
1881 | } | |
54cfded0 | 1882 | |
a4447b93 RH |
1883 | static void |
1884 | output_fde (struct fde_entry *fde, struct cie_entry *cie, | |
38462edf JJ |
1885 | bfd_boolean eh_frame, struct cfi_insn_data *first, |
1886 | int align) | |
a4447b93 RH |
1887 | { |
1888 | symbolS *after_size_address, *end_address; | |
1889 | expressionS exp; | |
9b8ae42e | 1890 | offsetT augmentation_size; |
38462edf JJ |
1891 | enum dwarf2_format fmt = DWARF2_FORMAT (now_seg); |
1892 | int offset_size; | |
1893 | int addr_size; | |
54cfded0 | 1894 | |
a4447b93 RH |
1895 | after_size_address = symbol_temp_make (); |
1896 | end_address = symbol_temp_make (); | |
54cfded0 | 1897 | |
a4447b93 RH |
1898 | exp.X_op = O_subtract; |
1899 | exp.X_add_symbol = end_address; | |
1900 | exp.X_op_symbol = after_size_address; | |
1901 | exp.X_add_number = 0; | |
38462edf JJ |
1902 | if (eh_frame || fmt == dwarf2_format_32bit) |
1903 | offset_size = 4; | |
1904 | else | |
1905 | { | |
1906 | if (fmt == dwarf2_format_64bit) | |
1907 | out_four (-1); | |
1908 | offset_size = 8; | |
1909 | } | |
1910 | emit_expr (&exp, offset_size); /* Length. */ | |
a4447b93 | 1911 | symbol_set_value_now (after_size_address); |
54cfded0 | 1912 | |
38462edf JJ |
1913 | if (eh_frame) |
1914 | { | |
3251495b | 1915 | exp.X_op = O_subtract; |
38462edf JJ |
1916 | exp.X_add_symbol = after_size_address; |
1917 | exp.X_op_symbol = cie->start_address; | |
3251495b RH |
1918 | exp.X_add_number = 0; |
1919 | emit_expr (&exp, offset_size); /* CIE offset. */ | |
38462edf JJ |
1920 | } |
1921 | else | |
1922 | { | |
3251495b | 1923 | TC_DWARF2_EMIT_OFFSET (cie->start_address, offset_size); |
38462edf | 1924 | } |
364b6d8b | 1925 | |
2f0c68f2 | 1926 | exp.X_op = O_symbol; |
38462edf JJ |
1927 | if (eh_frame) |
1928 | { | |
2f0c68f2 CM |
1929 | bfd_reloc_code_real_type code |
1930 | = tc_cfi_reloc_for_encoding (cie->fde_encoding); | |
1931 | if (code != BFD_RELOC_NONE) | |
1932 | { | |
1933 | reloc_howto_type *howto = bfd_reloc_type_lookup (stdoutput, code); | |
1934 | char *p = frag_more (4); | |
1935 | md_number_to_chars (p, 0, 4); | |
1936 | fix_new (frag_now, p - frag_now->fr_literal, 4, fde->start_address, | |
1937 | 0, howto->pc_relative, code); | |
1938 | } | |
1939 | else | |
1940 | { | |
1941 | exp.X_op = O_subtract; | |
1942 | exp.X_add_number = 0; | |
3dd24306 | 1943 | #if CFI_DIFF_EXPR_OK |
2f0c68f2 CM |
1944 | exp.X_add_symbol = fde->start_address; |
1945 | exp.X_op_symbol = symbol_temp_new_now (); | |
1946 | emit_expr (&exp, DWARF2_FDE_RELOC_SIZE); /* Code offset. */ | |
364b6d8b | 1947 | #else |
2f0c68f2 CM |
1948 | exp.X_op = O_symbol; |
1949 | exp.X_add_symbol = fde->start_address; | |
1950 | ||
1951 | #if defined(tc_cfi_emit_pcrel_expr) | |
1952 | tc_cfi_emit_pcrel_expr (&exp, DWARF2_FDE_RELOC_SIZE); /* Code offset. */ | |
364b6d8b | 1953 | #else |
2f0c68f2 | 1954 | emit_expr (&exp, DWARF2_FDE_RELOC_SIZE); /* Code offset. */ |
364b6d8b | 1955 | #endif |
364b6d8b | 1956 | #endif |
2f0c68f2 | 1957 | } |
38462edf JJ |
1958 | addr_size = DWARF2_FDE_RELOC_SIZE; |
1959 | } | |
1960 | else | |
1961 | { | |
3251495b | 1962 | exp.X_add_number = 0; |
2f0c68f2 | 1963 | exp.X_add_symbol = fde->start_address; |
38462edf JJ |
1964 | addr_size = DWARF2_ADDR_SIZE (stdoutput); |
1965 | emit_expr (&exp, addr_size); | |
1966 | } | |
54cfded0 | 1967 | |
38462edf | 1968 | exp.X_op = O_subtract; |
a4447b93 | 1969 | exp.X_add_symbol = fde->end_address; |
289040ca | 1970 | exp.X_op_symbol = fde->start_address; /* Code length. */ |
3251495b | 1971 | exp.X_add_number = 0; |
38462edf | 1972 | emit_expr (&exp, addr_size); |
54cfded0 | 1973 | |
9b8ae42e | 1974 | augmentation_size = encoding_size (fde->lsda_encoding); |
38462edf JJ |
1975 | if (eh_frame) |
1976 | out_uleb128 (augmentation_size); /* Augmentation size. */ | |
9b8ae42e | 1977 | |
2f0c68f2 | 1978 | emit_expr_encoded (&fde->lsda, cie->lsda_encoding, FALSE); |
39b82151 | 1979 | |
a4447b93 | 1980 | for (; first; first = first->next) |
6303c4ae | 1981 | if (CUR_SEG (first) == CUR_SEG (fde)) |
67ed7401 | 1982 | output_cfi_insn (first); |
39b82151 | 1983 | |
4df6ce47 | 1984 | frag_align (align, DW_CFA_nop, 0); |
a4447b93 RH |
1985 | symbol_set_value_now (end_address); |
1986 | } | |
1987 | ||
1988 | static struct cie_entry * | |
38462edf JJ |
1989 | select_cie_for_fde (struct fde_entry *fde, bfd_boolean eh_frame, |
1990 | struct cfi_insn_data **pfirst, int align) | |
a4447b93 RH |
1991 | { |
1992 | struct cfi_insn_data *i, *j; | |
1993 | struct cie_entry *cie; | |
1994 | ||
1995 | for (cie = cie_root; cie; cie = cie->next) | |
39b82151 | 1996 | { |
6303c4ae | 1997 | if (CUR_SEG (cie) != CUR_SEG (fde)) |
67ed7401 | 1998 | continue; |
67ed7401 | 1999 | if (cie->return_column != fde->return_column |
9b8ae42e JJ |
2000 | || cie->signal_frame != fde->signal_frame |
2001 | || cie->per_encoding != fde->per_encoding | |
2002 | || cie->lsda_encoding != fde->lsda_encoding) | |
a4447b93 | 2003 | continue; |
9b8ae42e JJ |
2004 | if (cie->per_encoding != DW_EH_PE_omit) |
2005 | { | |
2006 | if (cie->personality.X_op != fde->personality.X_op | |
2007 | || cie->personality.X_add_number | |
2008 | != fde->personality.X_add_number) | |
2009 | continue; | |
2010 | switch (cie->personality.X_op) | |
2011 | { | |
2012 | case O_constant: | |
2013 | if (cie->personality.X_unsigned != fde->personality.X_unsigned) | |
2014 | continue; | |
2015 | break; | |
2016 | case O_symbol: | |
2017 | if (cie->personality.X_add_symbol | |
2018 | != fde->personality.X_add_symbol) | |
2019 | continue; | |
2020 | break; | |
2021 | default: | |
2022 | abort (); | |
2023 | } | |
2024 | } | |
a4447b93 RH |
2025 | for (i = cie->first, j = fde->data; |
2026 | i != cie->last && j != NULL; | |
2027 | i = i->next, j = j->next) | |
39b82151 | 2028 | { |
a4447b93 RH |
2029 | if (i->insn != j->insn) |
2030 | goto fail; | |
2031 | switch (i->insn) | |
2032 | { | |
2033 | case DW_CFA_advance_loc: | |
289040ca NC |
2034 | case DW_CFA_remember_state: |
2035 | /* We reached the first advance/remember in the FDE, | |
2036 | but did not reach the end of the CIE list. */ | |
a4447b93 RH |
2037 | goto fail; |
2038 | ||
2039 | case DW_CFA_offset: | |
2040 | case DW_CFA_def_cfa: | |
2041 | if (i->u.ri.reg != j->u.ri.reg) | |
2042 | goto fail; | |
2043 | if (i->u.ri.offset != j->u.ri.offset) | |
2044 | goto fail; | |
2045 | break; | |
2046 | ||
2047 | case DW_CFA_register: | |
2048 | if (i->u.rr.reg1 != j->u.rr.reg1) | |
2049 | goto fail; | |
2050 | if (i->u.rr.reg2 != j->u.rr.reg2) | |
2051 | goto fail; | |
2052 | break; | |
2053 | ||
2054 | case DW_CFA_def_cfa_register: | |
2be24b54 ML |
2055 | case DW_CFA_restore: |
2056 | case DW_CFA_undefined: | |
2057 | case DW_CFA_same_value: | |
a4447b93 RH |
2058 | if (i->u.r != j->u.r) |
2059 | goto fail; | |
2060 | break; | |
2061 | ||
2062 | case DW_CFA_def_cfa_offset: | |
2063 | if (i->u.i != j->u.i) | |
2064 | goto fail; | |
2065 | break; | |
2066 | ||
cdfbf930 | 2067 | case CFI_escape: |
f1c4cc75 | 2068 | case CFI_val_encoded_addr: |
73e76108 | 2069 | case CFI_label: |
cdfbf930 RH |
2070 | /* Don't bother matching these for now. */ |
2071 | goto fail; | |
2072 | ||
a4447b93 RH |
2073 | default: |
2074 | abort (); | |
2075 | } | |
39b82151 | 2076 | } |
a4447b93 RH |
2077 | |
2078 | /* Success if we reached the end of the CIE list, and we've either | |
289040ca NC |
2079 | run out of FDE entries or we've encountered an advance, |
2080 | remember, or escape. */ | |
e9fad691 AM |
2081 | if (i == cie->last |
2082 | && (!j | |
2083 | || j->insn == DW_CFA_advance_loc | |
289040ca | 2084 | || j->insn == DW_CFA_remember_state |
f1c4cc75 | 2085 | || j->insn == CFI_escape |
73e76108 JB |
2086 | || j->insn == CFI_val_encoded_addr |
2087 | || j->insn == CFI_label)) | |
39b82151 | 2088 | { |
a4447b93 RH |
2089 | *pfirst = j; |
2090 | return cie; | |
39b82151 ML |
2091 | } |
2092 | ||
a4447b93 | 2093 | fail:; |
54cfded0 AM |
2094 | } |
2095 | ||
1e9cc1c2 | 2096 | cie = (struct cie_entry *) xmalloc (sizeof (struct cie_entry)); |
a4447b93 RH |
2097 | cie->next = cie_root; |
2098 | cie_root = cie; | |
6303c4ae | 2099 | SET_CUR_SEG (cie, CUR_SEG (fde)); |
a4447b93 | 2100 | cie->return_column = fde->return_column; |
63752a75 | 2101 | cie->signal_frame = fde->signal_frame; |
9b8ae42e JJ |
2102 | cie->per_encoding = fde->per_encoding; |
2103 | cie->lsda_encoding = fde->lsda_encoding; | |
2104 | cie->personality = fde->personality; | |
a4447b93 | 2105 | cie->first = fde->data; |
54cfded0 | 2106 | |
a4447b93 | 2107 | for (i = cie->first; i ; i = i->next) |
e9fad691 | 2108 | if (i->insn == DW_CFA_advance_loc |
289040ca | 2109 | || i->insn == DW_CFA_remember_state |
f1c4cc75 | 2110 | || i->insn == CFI_escape |
69602580 JB |
2111 | || i->insn == CFI_val_encoded_addr |
2112 | || i->insn == CFI_label) | |
a4447b93 | 2113 | break; |
54cfded0 | 2114 | |
a4447b93 RH |
2115 | cie->last = i; |
2116 | *pfirst = i; | |
38462edf JJ |
2117 | |
2118 | output_cie (cie, eh_frame, align); | |
54cfded0 | 2119 | |
a4447b93 | 2120 | return cie; |
54cfded0 AM |
2121 | } |
2122 | ||
38462edf JJ |
2123 | #ifdef md_reg_eh_frame_to_debug_frame |
2124 | static void | |
6303c4ae | 2125 | cfi_change_reg_numbers (struct cfi_insn_data *insn, segT ccseg) |
38462edf JJ |
2126 | { |
2127 | for (; insn; insn = insn->next) | |
72b016b4 | 2128 | { |
6303c4ae | 2129 | if (CUR_SEG (insn) != ccseg) |
83e12deb | 2130 | continue; |
72b016b4 NC |
2131 | switch (insn->insn) |
2132 | { | |
2133 | case DW_CFA_advance_loc: | |
2134 | case DW_CFA_def_cfa_offset: | |
2135 | case DW_CFA_remember_state: | |
2136 | case DW_CFA_restore_state: | |
2137 | case DW_CFA_GNU_window_save: | |
2138 | case CFI_escape: | |
73e76108 | 2139 | case CFI_label: |
72b016b4 | 2140 | break; |
38462edf | 2141 | |
72b016b4 NC |
2142 | case DW_CFA_def_cfa: |
2143 | case DW_CFA_offset: | |
2144 | insn->u.ri.reg = md_reg_eh_frame_to_debug_frame (insn->u.ri.reg); | |
2145 | break; | |
38462edf | 2146 | |
72b016b4 NC |
2147 | case DW_CFA_def_cfa_register: |
2148 | case DW_CFA_undefined: | |
2149 | case DW_CFA_same_value: | |
2150 | case DW_CFA_restore: | |
2151 | insn->u.r = md_reg_eh_frame_to_debug_frame (insn->u.r); | |
2152 | break; | |
38462edf | 2153 | |
72b016b4 NC |
2154 | case DW_CFA_register: |
2155 | insn->u.rr.reg1 = md_reg_eh_frame_to_debug_frame (insn->u.rr.reg1); | |
2156 | insn->u.rr.reg2 = md_reg_eh_frame_to_debug_frame (insn->u.rr.reg2); | |
2157 | break; | |
38462edf | 2158 | |
72b016b4 NC |
2159 | case CFI_val_encoded_addr: |
2160 | insn->u.ea.reg = md_reg_eh_frame_to_debug_frame (insn->u.ea.reg); | |
2161 | break; | |
38462edf | 2162 | |
72b016b4 NC |
2163 | default: |
2164 | abort (); | |
2165 | } | |
2166 | } | |
38462edf JJ |
2167 | } |
2168 | #else | |
72b016b4 | 2169 | #define cfi_change_reg_numbers(insn, cseg) do { } while (0) |
38462edf JJ |
2170 | #endif |
2171 | ||
2f0c68f2 CM |
2172 | #if SUPPORT_COMPACT_EH |
2173 | static void | |
2174 | cfi_emit_eh_header (symbolS *sym, bfd_vma addend) | |
72b016b4 | 2175 | { |
2f0c68f2 | 2176 | expressionS exp; |
72b016b4 | 2177 | |
2f0c68f2 CM |
2178 | exp.X_add_number = addend; |
2179 | exp.X_add_symbol = sym; | |
2180 | emit_expr_encoded (&exp, DW_EH_PE_sdata4 | DW_EH_PE_pcrel, FALSE); | |
2181 | } | |
72b016b4 | 2182 | |
2f0c68f2 CM |
2183 | static void |
2184 | output_eh_header (struct fde_entry *fde) | |
2185 | { | |
2186 | char *p; | |
2187 | bfd_vma addend; | |
2188 | ||
2189 | if (fde->eh_header_type == EH_COMPACT_INLINE) | |
2190 | addend = 0; | |
2191 | else | |
2192 | addend = 1; | |
2193 | ||
2194 | cfi_emit_eh_header (fde->start_address, addend); | |
2195 | ||
2196 | if (fde->eh_header_type == EH_COMPACT_INLINE) | |
2197 | { | |
2198 | p = frag_more (4); | |
2199 | /* Inline entries always use PR1. */ | |
2200 | *(p++) = 1; | |
2201 | memcpy(p, fde->eh_data, 3); | |
6303c4ae AM |
2202 | } |
2203 | else | |
2204 | { | |
2f0c68f2 CM |
2205 | if (fde->eh_header_type == EH_COMPACT_LEGACY) |
2206 | addend = 1; | |
2207 | else if (fde->eh_header_type == EH_COMPACT_OUTLINE | |
2208 | || fde->eh_header_type == EH_COMPACT_OUTLINE_DONE) | |
2209 | addend = 0; | |
2210 | else | |
2211 | abort (); | |
2212 | cfi_emit_eh_header (fde->eh_loc, addend); | |
6303c4ae | 2213 | } |
72b016b4 | 2214 | } |
2f0c68f2 | 2215 | #endif |
72b016b4 | 2216 | |
54cfded0 | 2217 | void |
a4447b93 | 2218 | cfi_finish (void) |
54cfded0 | 2219 | { |
72b016b4 NC |
2220 | struct cie_entry *cie, *cie_next; |
2221 | segT cfi_seg, ccseg; | |
a4447b93 | 2222 | struct fde_entry *fde; |
72b016b4 NC |
2223 | struct cfi_insn_data *first; |
2224 | int save_flag_traditional_format, seek_next_seg; | |
54cfded0 | 2225 | |
a4447b93 RH |
2226 | if (all_fde_data == 0) |
2227 | return; | |
54cfded0 | 2228 | |
bd5608dc | 2229 | cfi_sections_set = TRUE; |
2f0c68f2 CM |
2230 | if ((all_cfi_sections & CFI_EMIT_eh_frame) != 0 |
2231 | || (all_cfi_sections & CFI_EMIT_eh_frame_compact) != 0) | |
38462edf | 2232 | { |
38462edf JJ |
2233 | /* Make sure check_eh_frame doesn't do anything with our output. */ |
2234 | save_flag_traditional_format = flag_traditional_format; | |
2235 | flag_traditional_format = 1; | |
eafbc43f | 2236 | |
2f0c68f2 | 2237 | if (!EH_FRAME_LINKONCE) |
6303c4ae AM |
2238 | { |
2239 | /* Open .eh_frame section. */ | |
2240 | cfi_seg = get_cfi_seg (NULL, ".eh_frame", | |
2241 | (SEC_ALLOC | SEC_LOAD | SEC_DATA | |
2242 | | DWARF2_EH_FRAME_READ_ONLY), | |
2243 | EH_FRAME_ALIGNMENT); | |
67ed7401 | 2244 | #ifdef md_fix_up_eh_frame |
6303c4ae | 2245 | md_fix_up_eh_frame (cfi_seg); |
67ed7401 | 2246 | #else |
6303c4ae | 2247 | (void) cfi_seg; |
67ed7401 | 2248 | #endif |
6303c4ae | 2249 | } |
67ed7401 | 2250 | |
72b016b4 | 2251 | do |
83e12deb | 2252 | { |
72b016b4 | 2253 | ccseg = NULL; |
72b016b4 | 2254 | seek_next_seg = 0; |
67ed7401 | 2255 | |
72b016b4 | 2256 | for (cie = cie_root; cie; cie = cie_next) |
38462edf | 2257 | { |
72b016b4 NC |
2258 | cie_next = cie->next; |
2259 | free ((void *) cie); | |
38462edf | 2260 | } |
72b016b4 | 2261 | cie_root = NULL; |
38462edf | 2262 | |
72b016b4 NC |
2263 | for (fde = all_fde_data; fde ; fde = fde->next) |
2264 | { | |
2f0c68f2 CM |
2265 | if ((fde->sections & CFI_EMIT_eh_frame) == 0 |
2266 | && (fde->sections & CFI_EMIT_eh_frame_compact) == 0) | |
2267 | continue; | |
2268 | ||
2269 | #if SUPPORT_COMPACT_EH | |
2270 | /* Emit a LEGACY format header if we have processed all | |
2271 | of the .cfi directives without encountering either inline or | |
2272 | out-of-line compact unwinding opcodes. */ | |
2273 | if (fde->eh_header_type == EH_COMPACT_HAS_LSDA | |
2274 | || fde->eh_header_type == EH_COMPACT_UNKNOWN) | |
2275 | fde->eh_header_type = EH_COMPACT_LEGACY; | |
2276 | ||
2277 | if (fde->eh_header_type != EH_COMPACT_LEGACY) | |
2278 | continue; | |
2279 | #endif | |
2280 | if (EH_FRAME_LINKONCE) | |
6303c4ae AM |
2281 | { |
2282 | if (HANDLED (fde)) | |
2283 | continue; | |
2284 | if (seek_next_seg && CUR_SEG (fde) != ccseg) | |
2285 | { | |
2286 | seek_next_seg = 2; | |
2287 | continue; | |
2288 | } | |
2289 | if (!seek_next_seg) | |
2290 | { | |
2291 | ccseg = CUR_SEG (fde); | |
2292 | /* Open .eh_frame section. */ | |
2293 | cfi_seg = get_cfi_seg (ccseg, ".eh_frame", | |
2294 | (SEC_ALLOC | SEC_LOAD | SEC_DATA | |
2295 | | DWARF2_EH_FRAME_READ_ONLY), | |
2296 | EH_FRAME_ALIGNMENT); | |
72b016b4 | 2297 | #ifdef md_fix_up_eh_frame |
6303c4ae | 2298 | md_fix_up_eh_frame (cfi_seg); |
67ed7401 | 2299 | #else |
6303c4ae | 2300 | (void) cfi_seg; |
72b016b4 | 2301 | #endif |
6303c4ae AM |
2302 | seek_next_seg = 1; |
2303 | } | |
2304 | SET_HANDLED (fde, 1); | |
72b016b4 | 2305 | } |
72b016b4 NC |
2306 | |
2307 | if (fde->end_address == NULL) | |
2308 | { | |
2309 | as_bad (_("open CFI at the end of file; missing .cfi_endproc directive")); | |
2310 | fde->end_address = fde->start_address; | |
2311 | } | |
2312 | ||
2313 | cie = select_cie_for_fde (fde, TRUE, &first, 2); | |
2f0c68f2 | 2314 | fde->eh_loc = symbol_temp_new_now (); |
72b016b4 NC |
2315 | output_fde (fde, cie, TRUE, first, |
2316 | fde->next == NULL ? EH_FRAME_ALIGNMENT : 2); | |
2317 | } | |
38462edf | 2318 | } |
2f0c68f2 | 2319 | while (EH_FRAME_LINKONCE && seek_next_seg == 2); |
72b016b4 | 2320 | |
2f0c68f2 | 2321 | if (EH_FRAME_LINKONCE) |
6303c4ae AM |
2322 | for (fde = all_fde_data; fde ; fde = fde->next) |
2323 | SET_HANDLED (fde, 0); | |
38462edf | 2324 | |
2f0c68f2 CM |
2325 | #if SUPPORT_COMPACT_EH |
2326 | if (compact_eh) | |
2327 | { | |
2328 | /* Create remaining out of line table entries. */ | |
2329 | do | |
2330 | { | |
2331 | ccseg = NULL; | |
2332 | seek_next_seg = 0; | |
2333 | ||
2334 | for (fde = all_fde_data; fde ; fde = fde->next) | |
2335 | { | |
2336 | if ((fde->sections & CFI_EMIT_eh_frame) == 0 | |
2337 | && (fde->sections & CFI_EMIT_eh_frame_compact) == 0) | |
2338 | continue; | |
2339 | ||
2340 | if (fde->eh_header_type != EH_COMPACT_OUTLINE) | |
2341 | continue; | |
2342 | if (HANDLED (fde)) | |
2343 | continue; | |
2344 | if (seek_next_seg && CUR_SEG (fde) != ccseg) | |
2345 | { | |
2346 | seek_next_seg = 2; | |
2347 | continue; | |
2348 | } | |
2349 | if (!seek_next_seg) | |
2350 | { | |
2351 | ccseg = CUR_SEG (fde); | |
2352 | /* Open .gnu_extab section. */ | |
2353 | get_cfi_seg (ccseg, ".gnu_extab", | |
2354 | (SEC_ALLOC | SEC_LOAD | SEC_DATA | |
2355 | | DWARF2_EH_FRAME_READ_ONLY), | |
2356 | 1); | |
2357 | seek_next_seg = 1; | |
2358 | } | |
2359 | SET_HANDLED (fde, 1); | |
2360 | ||
2361 | frag_align (1, 0, 0); | |
2362 | record_alignment (now_seg, 1); | |
2363 | output_compact_unwind_data (fde, 1); | |
2364 | } | |
2365 | } | |
2366 | while (EH_FRAME_LINKONCE && seek_next_seg == 2); | |
2367 | ||
2368 | for (fde = all_fde_data; fde ; fde = fde->next) | |
2369 | SET_HANDLED (fde, 0); | |
2370 | ||
2371 | /* Create index table fragments. */ | |
2372 | do | |
2373 | { | |
2374 | ccseg = NULL; | |
2375 | seek_next_seg = 0; | |
2376 | ||
2377 | for (fde = all_fde_data; fde ; fde = fde->next) | |
2378 | { | |
2379 | if ((fde->sections & CFI_EMIT_eh_frame) == 0 | |
2380 | && (fde->sections & CFI_EMIT_eh_frame_compact) == 0) | |
2381 | continue; | |
2382 | ||
2383 | if (HANDLED (fde)) | |
2384 | continue; | |
2385 | if (seek_next_seg && CUR_SEG (fde) != ccseg) | |
2386 | { | |
2387 | seek_next_seg = 2; | |
2388 | continue; | |
2389 | } | |
2390 | if (!seek_next_seg) | |
2391 | { | |
2392 | ccseg = CUR_SEG (fde); | |
2393 | /* Open .eh_frame_entry section. */ | |
2394 | cfi_seg = get_cfi_seg (ccseg, ".eh_frame_entry", | |
2395 | (SEC_ALLOC | SEC_LOAD | SEC_DATA | |
2396 | | DWARF2_EH_FRAME_READ_ONLY), | |
2397 | 2); | |
2398 | seek_next_seg = 1; | |
2399 | } | |
2400 | SET_HANDLED (fde, 1); | |
2401 | ||
2402 | output_eh_header (fde); | |
2403 | } | |
2404 | } | |
2405 | while (seek_next_seg == 2); | |
2406 | ||
2407 | for (fde = all_fde_data; fde ; fde = fde->next) | |
2408 | SET_HANDLED (fde, 0); | |
2409 | } | |
2410 | #endif /* SUPPORT_COMPACT_EH */ | |
2411 | ||
38462edf JJ |
2412 | flag_traditional_format = save_flag_traditional_format; |
2413 | } | |
2414 | ||
bd5608dc | 2415 | cfi_sections_set = TRUE; |
2f0c68f2 | 2416 | if ((all_cfi_sections & CFI_EMIT_debug_frame) != 0) |
a4447b93 | 2417 | { |
38462edf | 2418 | int alignment = ffs (DWARF2_ADDR_SIZE (stdoutput)) - 1; |
a4447b93 | 2419 | |
6303c4ae AM |
2420 | if (!SUPPORT_FRAME_LINKONCE) |
2421 | get_cfi_seg (NULL, ".debug_frame", | |
2422 | SEC_READONLY | SEC_DEBUGGING, | |
2423 | alignment); | |
2424 | ||
72b016b4 | 2425 | do |
83e12deb | 2426 | { |
72b016b4 | 2427 | ccseg = NULL; |
72b016b4 | 2428 | seek_next_seg = 0; |
67ed7401 | 2429 | |
72b016b4 | 2430 | for (cie = cie_root; cie; cie = cie_next) |
38462edf | 2431 | { |
72b016b4 NC |
2432 | cie_next = cie->next; |
2433 | free ((void *) cie); | |
38462edf | 2434 | } |
72b016b4 | 2435 | cie_root = NULL; |
38462edf | 2436 | |
72b016b4 NC |
2437 | for (fde = all_fde_data; fde ; fde = fde->next) |
2438 | { | |
2f0c68f2 CM |
2439 | if ((fde->sections & CFI_EMIT_debug_frame) == 0) |
2440 | continue; | |
2441 | ||
6303c4ae AM |
2442 | if (SUPPORT_FRAME_LINKONCE) |
2443 | { | |
2444 | if (HANDLED (fde)) | |
2445 | continue; | |
2446 | if (seek_next_seg && CUR_SEG (fde) != ccseg) | |
2447 | { | |
2448 | seek_next_seg = 2; | |
2449 | continue; | |
2450 | } | |
2451 | if (!seek_next_seg) | |
2452 | { | |
2453 | ccseg = CUR_SEG (fde); | |
2454 | /* Open .debug_frame section. */ | |
2455 | get_cfi_seg (ccseg, ".debug_frame", | |
2456 | SEC_READONLY | SEC_DEBUGGING, | |
2457 | alignment); | |
2458 | seek_next_seg = 1; | |
2459 | } | |
2460 | SET_HANDLED (fde, 1); | |
72b016b4 | 2461 | } |
72b016b4 NC |
2462 | if (fde->end_address == NULL) |
2463 | { | |
2464 | as_bad (_("open CFI at the end of file; missing .cfi_endproc directive")); | |
2465 | fde->end_address = fde->start_address; | |
2466 | } | |
2467 | ||
2468 | fde->per_encoding = DW_EH_PE_omit; | |
2469 | fde->lsda_encoding = DW_EH_PE_omit; | |
2470 | cfi_change_reg_numbers (fde->data, ccseg); | |
2471 | cie = select_cie_for_fde (fde, FALSE, &first, alignment); | |
2472 | output_fde (fde, cie, FALSE, first, alignment); | |
2473 | } | |
38462edf | 2474 | } |
67ed7401 | 2475 | while (SUPPORT_FRAME_LINKONCE && seek_next_seg == 2); |
72b016b4 | 2476 | |
6303c4ae AM |
2477 | if (SUPPORT_FRAME_LINKONCE) |
2478 | for (fde = all_fde_data; fde ; fde = fde->next) | |
2479 | SET_HANDLED (fde, 0); | |
38462edf | 2480 | } |
54cfded0 | 2481 | } |
0a7b15ff JB |
2482 | |
2483 | #else /* TARGET_USE_CFIPOP */ | |
d58a1929 | 2484 | |
5ff2bd08 | 2485 | /* Emit an intelligible error message for missing support. */ |
d58a1929 RH |
2486 | |
2487 | static void | |
2488 | dot_cfi_dummy (int ignored ATTRIBUTE_UNUSED) | |
2489 | { | |
2490 | as_bad (_("CFI is not supported for this target")); | |
2491 | ignore_rest_of_line (); | |
2492 | } | |
2493 | ||
2494 | const pseudo_typeS cfi_pseudo_table[] = | |
2495 | { | |
2496 | { "cfi_sections", dot_cfi_dummy, 0 }, | |
2497 | { "cfi_startproc", dot_cfi_dummy, 0 }, | |
2498 | { "cfi_endproc", dot_cfi_dummy, 0 }, | |
2f0c68f2 | 2499 | { "cfi_fde_data", dot_cfi_dummy, 0 }, |
d58a1929 RH |
2500 | { "cfi_def_cfa", dot_cfi_dummy, 0 }, |
2501 | { "cfi_def_cfa_register", dot_cfi_dummy, 0 }, | |
2502 | { "cfi_def_cfa_offset", dot_cfi_dummy, 0 }, | |
2503 | { "cfi_adjust_cfa_offset", dot_cfi_dummy, 0 }, | |
2504 | { "cfi_offset", dot_cfi_dummy, 0 }, | |
2505 | { "cfi_rel_offset", dot_cfi_dummy, 0 }, | |
2506 | { "cfi_register", dot_cfi_dummy, 0 }, | |
2507 | { "cfi_return_column", dot_cfi_dummy, 0 }, | |
2508 | { "cfi_restore", dot_cfi_dummy, 0 }, | |
2509 | { "cfi_undefined", dot_cfi_dummy, 0 }, | |
2510 | { "cfi_same_value", dot_cfi_dummy, 0 }, | |
2511 | { "cfi_remember_state", dot_cfi_dummy, 0 }, | |
2512 | { "cfi_restore_state", dot_cfi_dummy, 0 }, | |
2513 | { "cfi_window_save", dot_cfi_dummy, 0 }, | |
2514 | { "cfi_escape", dot_cfi_dummy, 0 }, | |
2515 | { "cfi_signal_frame", dot_cfi_dummy, 0 }, | |
2516 | { "cfi_personality", dot_cfi_dummy, 0 }, | |
2f0c68f2 | 2517 | { "cfi_personality_id", dot_cfi_dummy, 0 }, |
d58a1929 RH |
2518 | { "cfi_lsda", dot_cfi_dummy, 0 }, |
2519 | { "cfi_val_encoded_addr", dot_cfi_dummy, 0 }, | |
73e76108 | 2520 | { "cfi_label", dot_cfi_dummy, 0 }, |
2f0c68f2 | 2521 | { "cfi_inline_lsda", dot_cfi_dummy, 0 }, |
d58a1929 RH |
2522 | { NULL, NULL, 0 } |
2523 | }; | |
2524 | ||
0a7b15ff JB |
2525 | void |
2526 | cfi_finish (void) | |
2527 | { | |
2528 | } | |
2529 | #endif /* TARGET_USE_CFIPOP */ |