Commit | Line | Data |
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54cfded0 | 1 | /* dw2gencfi.c - Support for generating Dwarf2 CFI information. |
ec2655a6 | 2 | Copyright 2003, 2004, 2005, 2006, 2007 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" |
54cfded0 | 25 | |
0a7b15ff | 26 | #ifdef TARGET_USE_CFIPOP |
a4447b93 RH |
27 | |
28 | /* We re-use DWARF2_LINE_MIN_INSN_LENGTH for the code alignment field | |
29 | of the CIE. Default to 1 if not otherwise specified. */ | |
289040ca | 30 | #ifndef DWARF2_LINE_MIN_INSN_LENGTH |
a4447b93 RH |
31 | # define DWARF2_LINE_MIN_INSN_LENGTH 1 |
32 | #endif | |
33 | ||
9393cb0d | 34 | #ifndef EH_FRAME_ALIGNMENT |
7be1c489 | 35 | # define EH_FRAME_ALIGNMENT (bfd_get_arch_size (stdoutput) == 64 ? 3 : 2) |
9393cb0d JJ |
36 | #endif |
37 | ||
a4447b93 RH |
38 | #ifndef tc_cfi_frame_initial_instructions |
39 | # define tc_cfi_frame_initial_instructions() ((void)0) | |
40 | #endif | |
41 | ||
42 | ||
43 | struct cfi_insn_data | |
39b82151 | 44 | { |
a4447b93 RH |
45 | struct cfi_insn_data *next; |
46 | int insn; | |
47 | union { | |
48 | struct { | |
49 | unsigned reg; | |
50 | offsetT offset; | |
51 | } ri; | |
52 | ||
53 | struct { | |
54 | unsigned reg1; | |
55 | unsigned reg2; | |
56 | } rr; | |
57 | ||
58 | unsigned r; | |
59 | offsetT i; | |
60 | ||
61 | struct { | |
62 | symbolS *lab1; | |
63 | symbolS *lab2; | |
64 | } ll; | |
cdfbf930 RH |
65 | |
66 | struct cfi_escape_data { | |
67 | struct cfi_escape_data *next; | |
68 | expressionS exp; | |
69 | } *esc; | |
a4447b93 | 70 | } u; |
39b82151 ML |
71 | }; |
72 | ||
a4447b93 | 73 | struct fde_entry |
39b82151 | 74 | { |
a4447b93 RH |
75 | struct fde_entry *next; |
76 | symbolS *start_address; | |
77 | symbolS *end_address; | |
78 | struct cfi_insn_data *data; | |
79 | struct cfi_insn_data **last; | |
9b8ae42e JJ |
80 | unsigned char per_encoding; |
81 | unsigned char lsda_encoding; | |
82 | expressionS personality; | |
83 | expressionS lsda; | |
a4447b93 | 84 | unsigned int return_column; |
63752a75 | 85 | unsigned int signal_frame; |
39b82151 ML |
86 | }; |
87 | ||
a4447b93 | 88 | struct cie_entry |
39b82151 | 89 | { |
a4447b93 RH |
90 | struct cie_entry *next; |
91 | symbolS *start_address; | |
92 | unsigned int return_column; | |
63752a75 | 93 | unsigned int signal_frame; |
9b8ae42e JJ |
94 | unsigned char per_encoding; |
95 | unsigned char lsda_encoding; | |
96 | expressionS personality; | |
a4447b93 | 97 | struct cfi_insn_data *first, *last; |
39b82151 ML |
98 | }; |
99 | ||
a4447b93 | 100 | |
a4447b93 RH |
101 | /* List of FDE entries. */ |
102 | static struct fde_entry *all_fde_data; | |
103 | static struct fde_entry **last_fde_data = &all_fde_data; | |
39b82151 ML |
104 | |
105 | /* List of CIEs so that they could be reused. */ | |
106 | static struct cie_entry *cie_root; | |
107 | ||
fa87b337 RH |
108 | /* Stack of old CFI data, for save/restore. */ |
109 | struct cfa_save_data | |
110 | { | |
111 | struct cfa_save_data *next; | |
112 | offsetT cfa_offset; | |
113 | }; | |
114 | ||
ae424f82 JJ |
115 | /* Current open FDE entry. */ |
116 | struct frch_cfi_data | |
117 | { | |
118 | struct fde_entry *cur_fde_data; | |
119 | symbolS *last_address; | |
120 | offsetT cur_cfa_offset; | |
121 | struct cfa_save_data *cfa_save_stack; | |
122 | }; | |
a4447b93 RH |
123 | \f |
124 | /* Construct a new FDE structure and add it to the end of the fde list. */ | |
54cfded0 | 125 | |
a4447b93 RH |
126 | static struct fde_entry * |
127 | alloc_fde_entry (void) | |
128 | { | |
129 | struct fde_entry *fde = xcalloc (1, sizeof (struct fde_entry)); | |
54cfded0 | 130 | |
ae424f82 JJ |
131 | frchain_now->frch_cfi_data = xcalloc (1, sizeof (struct frch_cfi_data)); |
132 | frchain_now->frch_cfi_data->cur_fde_data = fde; | |
a4447b93 RH |
133 | *last_fde_data = fde; |
134 | last_fde_data = &fde->next; | |
54cfded0 | 135 | |
a4447b93 RH |
136 | fde->last = &fde->data; |
137 | fde->return_column = DWARF2_DEFAULT_RETURN_COLUMN; | |
9b8ae42e JJ |
138 | fde->per_encoding = DW_EH_PE_omit; |
139 | fde->lsda_encoding = DW_EH_PE_omit; | |
a4447b93 RH |
140 | |
141 | return fde; | |
142 | } | |
143 | ||
144 | /* The following functions are available for a backend to construct its | |
145 | own unwind information, usually from legacy unwind directives. */ | |
146 | ||
147 | /* Construct a new INSN structure and add it to the end of the insn list | |
148 | for the currently active FDE. */ | |
149 | ||
150 | static struct cfi_insn_data * | |
151 | alloc_cfi_insn_data (void) | |
54cfded0 | 152 | { |
a4447b93 | 153 | struct cfi_insn_data *insn = xcalloc (1, sizeof (struct cfi_insn_data)); |
ae424f82 | 154 | struct fde_entry *cur_fde_data = frchain_now->frch_cfi_data->cur_fde_data; |
a4447b93 RH |
155 | |
156 | *cur_fde_data->last = insn; | |
157 | cur_fde_data->last = &insn->next; | |
54cfded0 | 158 | |
a4447b93 | 159 | return insn; |
54cfded0 AM |
160 | } |
161 | ||
a4447b93 RH |
162 | /* Construct a new FDE structure that begins at LABEL. */ |
163 | ||
164 | void | |
165 | cfi_new_fde (symbolS *label) | |
54cfded0 | 166 | { |
a4447b93 RH |
167 | struct fde_entry *fde = alloc_fde_entry (); |
168 | fde->start_address = label; | |
ae424f82 | 169 | frchain_now->frch_cfi_data->last_address = label; |
54cfded0 AM |
170 | } |
171 | ||
a4447b93 RH |
172 | /* End the currently open FDE. */ |
173 | ||
174 | void | |
175 | cfi_end_fde (symbolS *label) | |
54cfded0 | 176 | { |
ae424f82 JJ |
177 | frchain_now->frch_cfi_data->cur_fde_data->end_address = label; |
178 | free (frchain_now->frch_cfi_data); | |
179 | frchain_now->frch_cfi_data = NULL; | |
54cfded0 AM |
180 | } |
181 | ||
a4447b93 RH |
182 | /* Set the return column for the current FDE. */ |
183 | ||
184 | void | |
185 | cfi_set_return_column (unsigned regno) | |
54cfded0 | 186 | { |
ae424f82 | 187 | frchain_now->frch_cfi_data->cur_fde_data->return_column = regno; |
a4447b93 | 188 | } |
54cfded0 | 189 | |
2be24b54 ML |
190 | /* Universal functions to store new instructions. */ |
191 | ||
192 | static void | |
193 | cfi_add_CFA_insn(int insn) | |
194 | { | |
195 | struct cfi_insn_data *insn_ptr = alloc_cfi_insn_data (); | |
196 | ||
197 | insn_ptr->insn = insn; | |
198 | } | |
199 | ||
200 | static void | |
201 | cfi_add_CFA_insn_reg (int insn, unsigned regno) | |
202 | { | |
203 | struct cfi_insn_data *insn_ptr = alloc_cfi_insn_data (); | |
204 | ||
205 | insn_ptr->insn = insn; | |
206 | insn_ptr->u.r = regno; | |
207 | } | |
208 | ||
209 | static void | |
210 | cfi_add_CFA_insn_offset (int insn, offsetT offset) | |
211 | { | |
212 | struct cfi_insn_data *insn_ptr = alloc_cfi_insn_data (); | |
213 | ||
214 | insn_ptr->insn = insn; | |
215 | insn_ptr->u.i = offset; | |
216 | } | |
217 | ||
218 | static void | |
219 | cfi_add_CFA_insn_reg_reg (int insn, unsigned reg1, unsigned reg2) | |
220 | { | |
221 | struct cfi_insn_data *insn_ptr = alloc_cfi_insn_data (); | |
222 | ||
223 | insn_ptr->insn = insn; | |
224 | insn_ptr->u.rr.reg1 = reg1; | |
225 | insn_ptr->u.rr.reg2 = reg2; | |
226 | } | |
227 | ||
228 | static void | |
229 | cfi_add_CFA_insn_reg_offset (int insn, unsigned regno, offsetT offset) | |
230 | { | |
231 | struct cfi_insn_data *insn_ptr = alloc_cfi_insn_data (); | |
232 | ||
233 | insn_ptr->insn = insn; | |
234 | insn_ptr->u.ri.reg = regno; | |
235 | insn_ptr->u.ri.offset = offset; | |
236 | } | |
237 | ||
a4447b93 | 238 | /* Add a CFI insn to advance the PC from the last address to LABEL. */ |
54cfded0 | 239 | |
a4447b93 RH |
240 | void |
241 | cfi_add_advance_loc (symbolS *label) | |
242 | { | |
243 | struct cfi_insn_data *insn = alloc_cfi_insn_data (); | |
7c0295b1 | 244 | |
a4447b93 | 245 | insn->insn = DW_CFA_advance_loc; |
ae424f82 | 246 | insn->u.ll.lab1 = frchain_now->frch_cfi_data->last_address; |
a4447b93 | 247 | insn->u.ll.lab2 = label; |
54cfded0 | 248 | |
ae424f82 | 249 | frchain_now->frch_cfi_data->last_address = label; |
a4447b93 | 250 | } |
54cfded0 | 251 | |
a4447b93 RH |
252 | /* Add a DW_CFA_offset record to the CFI data. */ |
253 | ||
254 | void | |
255 | cfi_add_CFA_offset (unsigned regno, offsetT offset) | |
256 | { | |
fa87b337 RH |
257 | unsigned int abs_data_align; |
258 | ||
ba5f0fda | 259 | assert (DWARF2_CIE_DATA_ALIGNMENT != 0); |
2be24b54 | 260 | cfi_add_CFA_insn_reg_offset (DW_CFA_offset, regno, offset); |
fa87b337 RH |
261 | |
262 | abs_data_align = (DWARF2_CIE_DATA_ALIGNMENT < 0 | |
263 | ? -DWARF2_CIE_DATA_ALIGNMENT : DWARF2_CIE_DATA_ALIGNMENT); | |
264 | if (offset % abs_data_align) | |
265 | as_bad (_("register save offset not a multiple of %u"), abs_data_align); | |
a4447b93 | 266 | } |
54cfded0 | 267 | |
a4447b93 | 268 | /* Add a DW_CFA_def_cfa record to the CFI data. */ |
54cfded0 | 269 | |
a4447b93 RH |
270 | void |
271 | cfi_add_CFA_def_cfa (unsigned regno, offsetT offset) | |
272 | { | |
2be24b54 | 273 | cfi_add_CFA_insn_reg_offset (DW_CFA_def_cfa, regno, offset); |
ae424f82 | 274 | frchain_now->frch_cfi_data->cur_cfa_offset = offset; |
54cfded0 AM |
275 | } |
276 | ||
a4447b93 RH |
277 | /* Add a DW_CFA_register record to the CFI data. */ |
278 | ||
279 | void | |
280 | cfi_add_CFA_register (unsigned reg1, unsigned reg2) | |
54cfded0 | 281 | { |
2be24b54 | 282 | cfi_add_CFA_insn_reg_reg (DW_CFA_register, reg1, reg2); |
54cfded0 AM |
283 | } |
284 | ||
a4447b93 RH |
285 | /* Add a DW_CFA_def_cfa_register record to the CFI data. */ |
286 | ||
287 | void | |
288 | cfi_add_CFA_def_cfa_register (unsigned regno) | |
54cfded0 | 289 | { |
2be24b54 | 290 | cfi_add_CFA_insn_reg (DW_CFA_def_cfa_register, regno); |
54cfded0 AM |
291 | } |
292 | ||
a4447b93 RH |
293 | /* Add a DW_CFA_def_cfa_offset record to the CFI data. */ |
294 | ||
54cfded0 | 295 | void |
a4447b93 | 296 | cfi_add_CFA_def_cfa_offset (offsetT offset) |
54cfded0 | 297 | { |
2be24b54 | 298 | cfi_add_CFA_insn_offset (DW_CFA_def_cfa_offset, offset); |
ae424f82 | 299 | frchain_now->frch_cfi_data->cur_cfa_offset = offset; |
a4447b93 | 300 | } |
54cfded0 | 301 | |
2be24b54 ML |
302 | void |
303 | cfi_add_CFA_restore (unsigned regno) | |
304 | { | |
305 | cfi_add_CFA_insn_reg (DW_CFA_restore, regno); | |
306 | } | |
307 | ||
308 | void | |
309 | cfi_add_CFA_undefined (unsigned regno) | |
310 | { | |
311 | cfi_add_CFA_insn_reg (DW_CFA_undefined, regno); | |
312 | } | |
313 | ||
314 | void | |
315 | cfi_add_CFA_same_value (unsigned regno) | |
316 | { | |
317 | cfi_add_CFA_insn_reg (DW_CFA_same_value, regno); | |
318 | } | |
319 | ||
320 | void | |
321 | cfi_add_CFA_remember_state (void) | |
322 | { | |
fa87b337 RH |
323 | struct cfa_save_data *p; |
324 | ||
2be24b54 | 325 | cfi_add_CFA_insn (DW_CFA_remember_state); |
fa87b337 RH |
326 | |
327 | p = xmalloc (sizeof (*p)); | |
ae424f82 JJ |
328 | p->cfa_offset = frchain_now->frch_cfi_data->cur_cfa_offset; |
329 | p->next = frchain_now->frch_cfi_data->cfa_save_stack; | |
330 | frchain_now->frch_cfi_data->cfa_save_stack = p; | |
2be24b54 ML |
331 | } |
332 | ||
333 | void | |
334 | cfi_add_CFA_restore_state (void) | |
335 | { | |
fa87b337 RH |
336 | struct cfa_save_data *p; |
337 | ||
2be24b54 | 338 | cfi_add_CFA_insn (DW_CFA_restore_state); |
fa87b337 | 339 | |
ae424f82 | 340 | p = frchain_now->frch_cfi_data->cfa_save_stack; |
fa87b337 RH |
341 | if (p) |
342 | { | |
ae424f82 JJ |
343 | frchain_now->frch_cfi_data->cur_cfa_offset = p->cfa_offset; |
344 | frchain_now->frch_cfi_data->cfa_save_stack = p->next; | |
fa87b337 RH |
345 | free (p); |
346 | } | |
289040ca NC |
347 | else |
348 | as_bad (_("CFI state restore without previous remember")); | |
2be24b54 ML |
349 | } |
350 | ||
a4447b93 RH |
351 | \f |
352 | /* Parse CFI assembler directives. */ | |
54cfded0 | 353 | |
a4447b93 | 354 | static void dot_cfi (int); |
cdfbf930 | 355 | static void dot_cfi_escape (int); |
a4447b93 RH |
356 | static void dot_cfi_startproc (int); |
357 | static void dot_cfi_endproc (int); | |
9b8ae42e JJ |
358 | static void dot_cfi_personality (int); |
359 | static void dot_cfi_lsda (int); | |
54cfded0 | 360 | |
a4447b93 | 361 | /* Fake CFI type; outside the byte range of any real CFI insn. */ |
2be24b54 ML |
362 | #define CFI_adjust_cfa_offset 0x100 |
363 | #define CFI_return_column 0x101 | |
fa87b337 | 364 | #define CFI_rel_offset 0x102 |
cdfbf930 | 365 | #define CFI_escape 0x103 |
63752a75 | 366 | #define CFI_signal_frame 0x104 |
54cfded0 | 367 | |
a4447b93 RH |
368 | const pseudo_typeS cfi_pseudo_table[] = |
369 | { | |
370 | { "cfi_startproc", dot_cfi_startproc, 0 }, | |
371 | { "cfi_endproc", dot_cfi_endproc, 0 }, | |
372 | { "cfi_def_cfa", dot_cfi, DW_CFA_def_cfa }, | |
373 | { "cfi_def_cfa_register", dot_cfi, DW_CFA_def_cfa_register }, | |
374 | { "cfi_def_cfa_offset", dot_cfi, DW_CFA_def_cfa_offset }, | |
375 | { "cfi_adjust_cfa_offset", dot_cfi, CFI_adjust_cfa_offset }, | |
376 | { "cfi_offset", dot_cfi, DW_CFA_offset }, | |
fa87b337 | 377 | { "cfi_rel_offset", dot_cfi, CFI_rel_offset }, |
a4447b93 | 378 | { "cfi_register", dot_cfi, DW_CFA_register }, |
2be24b54 ML |
379 | { "cfi_return_column", dot_cfi, CFI_return_column }, |
380 | { "cfi_restore", dot_cfi, DW_CFA_restore }, | |
381 | { "cfi_undefined", dot_cfi, DW_CFA_undefined }, | |
382 | { "cfi_same_value", dot_cfi, DW_CFA_same_value }, | |
383 | { "cfi_remember_state", dot_cfi, DW_CFA_remember_state }, | |
384 | { "cfi_restore_state", dot_cfi, DW_CFA_restore_state }, | |
6749011b | 385 | { "cfi_window_save", dot_cfi, DW_CFA_GNU_window_save }, |
cdfbf930 | 386 | { "cfi_escape", dot_cfi_escape, 0 }, |
63752a75 | 387 | { "cfi_signal_frame", dot_cfi, CFI_signal_frame }, |
9b8ae42e JJ |
388 | { "cfi_personality", dot_cfi_personality, 0 }, |
389 | { "cfi_lsda", dot_cfi_lsda, 0 }, | |
a4447b93 RH |
390 | { NULL, NULL, 0 } |
391 | }; | |
54cfded0 AM |
392 | |
393 | static void | |
a4447b93 | 394 | cfi_parse_separator (void) |
54cfded0 | 395 | { |
a4447b93 RH |
396 | SKIP_WHITESPACE (); |
397 | if (*input_line_pointer == ',') | |
398 | input_line_pointer++; | |
399 | else | |
400 | as_bad (_("missing separator")); | |
54cfded0 AM |
401 | } |
402 | ||
a4447b93 RH |
403 | static unsigned |
404 | cfi_parse_reg (void) | |
54cfded0 | 405 | { |
a4447b93 RH |
406 | int regno; |
407 | expressionS exp; | |
408 | ||
409 | #ifdef tc_regname_to_dw2regnum | |
410 | SKIP_WHITESPACE (); | |
411 | if (is_name_beginner (*input_line_pointer) | |
412 | || (*input_line_pointer == '%' | |
413 | && is_name_beginner (*++input_line_pointer))) | |
414 | { | |
415 | char *name, c; | |
416 | ||
417 | name = input_line_pointer; | |
418 | c = get_symbol_end (); | |
419 | ||
420 | if ((regno = tc_regname_to_dw2regnum (name)) < 0) | |
421 | { | |
422 | as_bad (_("bad register expression")); | |
423 | regno = 0; | |
424 | } | |
54cfded0 | 425 | |
a4447b93 RH |
426 | *input_line_pointer = c; |
427 | return regno; | |
428 | } | |
429 | #endif | |
430 | ||
9497f5ac | 431 | expression_and_evaluate (&exp); |
a4447b93 | 432 | switch (exp.X_op) |
54cfded0 | 433 | { |
a4447b93 RH |
434 | case O_register: |
435 | case O_constant: | |
436 | regno = exp.X_add_number; | |
437 | break; | |
438 | ||
439 | default: | |
440 | as_bad (_("bad register expression")); | |
441 | regno = 0; | |
442 | break; | |
54cfded0 AM |
443 | } |
444 | ||
a4447b93 RH |
445 | return regno; |
446 | } | |
447 | ||
448 | static offsetT | |
449 | cfi_parse_const (void) | |
450 | { | |
451 | return get_absolute_expression (); | |
54cfded0 AM |
452 | } |
453 | ||
454 | static void | |
a4447b93 | 455 | dot_cfi (int arg) |
54cfded0 | 456 | { |
a4447b93 RH |
457 | offsetT offset; |
458 | unsigned reg1, reg2; | |
54cfded0 | 459 | |
ae424f82 | 460 | if (frchain_now->frch_cfi_data == NULL) |
54cfded0 AM |
461 | { |
462 | as_bad (_("CFI instruction used without previous .cfi_startproc")); | |
7c9c8381 | 463 | ignore_rest_of_line (); |
54cfded0 AM |
464 | return; |
465 | } | |
466 | ||
a4447b93 | 467 | /* If the last address was not at the current PC, advance to current. */ |
ae424f82 JJ |
468 | if (symbol_get_frag (frchain_now->frch_cfi_data->last_address) != frag_now |
469 | || S_GET_VALUE (frchain_now->frch_cfi_data->last_address) | |
470 | != frag_now_fix ()) | |
a4447b93 | 471 | cfi_add_advance_loc (symbol_temp_new_now ()); |
54cfded0 AM |
472 | |
473 | switch (arg) | |
474 | { | |
a4447b93 | 475 | case DW_CFA_offset: |
a4447b93 RH |
476 | reg1 = cfi_parse_reg (); |
477 | cfi_parse_separator (); | |
478 | offset = cfi_parse_const (); | |
2be24b54 ML |
479 | cfi_add_CFA_offset (reg1, offset); |
480 | break; | |
a4447b93 | 481 | |
fa87b337 RH |
482 | case CFI_rel_offset: |
483 | reg1 = cfi_parse_reg (); | |
484 | cfi_parse_separator (); | |
485 | offset = cfi_parse_const (); | |
ae424f82 JJ |
486 | cfi_add_CFA_offset (reg1, |
487 | offset - frchain_now->frch_cfi_data->cur_cfa_offset); | |
fa87b337 RH |
488 | break; |
489 | ||
2be24b54 ML |
490 | case DW_CFA_def_cfa: |
491 | reg1 = cfi_parse_reg (); | |
492 | cfi_parse_separator (); | |
493 | offset = cfi_parse_const (); | |
494 | cfi_add_CFA_def_cfa (reg1, offset); | |
54cfded0 AM |
495 | break; |
496 | ||
a4447b93 RH |
497 | case DW_CFA_register: |
498 | reg1 = cfi_parse_reg (); | |
499 | cfi_parse_separator (); | |
500 | reg2 = cfi_parse_reg (); | |
a4447b93 | 501 | cfi_add_CFA_register (reg1, reg2); |
39b82151 ML |
502 | break; |
503 | ||
a4447b93 RH |
504 | case DW_CFA_def_cfa_register: |
505 | reg1 = cfi_parse_reg (); | |
506 | cfi_add_CFA_def_cfa_register (reg1); | |
54cfded0 AM |
507 | break; |
508 | ||
a4447b93 RH |
509 | case DW_CFA_def_cfa_offset: |
510 | offset = cfi_parse_const (); | |
511 | cfi_add_CFA_def_cfa_offset (offset); | |
54cfded0 AM |
512 | break; |
513 | ||
54cfded0 | 514 | case CFI_adjust_cfa_offset: |
a4447b93 | 515 | offset = cfi_parse_const (); |
ae424f82 JJ |
516 | cfi_add_CFA_def_cfa_offset (frchain_now->frch_cfi_data->cur_cfa_offset |
517 | + offset); | |
54cfded0 AM |
518 | break; |
519 | ||
2be24b54 | 520 | case DW_CFA_restore: |
b57d375b JB |
521 | for (;;) |
522 | { | |
523 | reg1 = cfi_parse_reg (); | |
524 | cfi_add_CFA_restore (reg1); | |
525 | SKIP_WHITESPACE (); | |
526 | if (*input_line_pointer != ',') | |
527 | break; | |
528 | ++input_line_pointer; | |
529 | } | |
2be24b54 ML |
530 | break; |
531 | ||
532 | case DW_CFA_undefined: | |
b57d375b JB |
533 | for (;;) |
534 | { | |
535 | reg1 = cfi_parse_reg (); | |
536 | cfi_add_CFA_undefined (reg1); | |
537 | SKIP_WHITESPACE (); | |
538 | if (*input_line_pointer != ',') | |
539 | break; | |
540 | ++input_line_pointer; | |
541 | } | |
2be24b54 ML |
542 | break; |
543 | ||
544 | case DW_CFA_same_value: | |
545 | reg1 = cfi_parse_reg (); | |
546 | cfi_add_CFA_same_value (reg1); | |
547 | break; | |
548 | ||
549 | case CFI_return_column: | |
550 | reg1 = cfi_parse_reg (); | |
551 | cfi_set_return_column (reg1); | |
552 | break; | |
553 | ||
554 | case DW_CFA_remember_state: | |
555 | cfi_add_CFA_remember_state (); | |
556 | break; | |
557 | ||
558 | case DW_CFA_restore_state: | |
559 | cfi_add_CFA_restore_state (); | |
560 | break; | |
561 | ||
364b6d8b JJ |
562 | case DW_CFA_GNU_window_save: |
563 | cfi_add_CFA_insn (DW_CFA_GNU_window_save); | |
564 | break; | |
565 | ||
63752a75 | 566 | case CFI_signal_frame: |
ae424f82 | 567 | frchain_now->frch_cfi_data->cur_fde_data->signal_frame = 1; |
63752a75 JJ |
568 | break; |
569 | ||
54cfded0 | 570 | default: |
a4447b93 | 571 | abort (); |
54cfded0 | 572 | } |
54cfded0 | 573 | |
a4447b93 | 574 | demand_empty_rest_of_line (); |
54cfded0 AM |
575 | } |
576 | ||
cdfbf930 RH |
577 | static void |
578 | dot_cfi_escape (int ignored ATTRIBUTE_UNUSED) | |
579 | { | |
580 | struct cfi_escape_data *head, **tail, *e; | |
581 | struct cfi_insn_data *insn; | |
582 | ||
ae424f82 | 583 | if (frchain_now->frch_cfi_data == NULL) |
cdfbf930 RH |
584 | { |
585 | as_bad (_("CFI instruction used without previous .cfi_startproc")); | |
7c9c8381 | 586 | ignore_rest_of_line (); |
cdfbf930 RH |
587 | return; |
588 | } | |
589 | ||
590 | /* If the last address was not at the current PC, advance to current. */ | |
ae424f82 JJ |
591 | if (symbol_get_frag (frchain_now->frch_cfi_data->last_address) != frag_now |
592 | || S_GET_VALUE (frchain_now->frch_cfi_data->last_address) | |
593 | != frag_now_fix ()) | |
cdfbf930 RH |
594 | cfi_add_advance_loc (symbol_temp_new_now ()); |
595 | ||
596 | tail = &head; | |
597 | do | |
598 | { | |
599 | e = xmalloc (sizeof (*e)); | |
600 | do_parse_cons_expression (&e->exp, 1); | |
601 | *tail = e; | |
602 | tail = &e->next; | |
603 | } | |
604 | while (*input_line_pointer++ == ','); | |
605 | *tail = NULL; | |
606 | ||
607 | insn = alloc_cfi_insn_data (); | |
608 | insn->insn = CFI_escape; | |
609 | insn->u.esc = head; | |
7c9c8381 JB |
610 | |
611 | --input_line_pointer; | |
612 | demand_empty_rest_of_line (); | |
cdfbf930 RH |
613 | } |
614 | ||
9b8ae42e JJ |
615 | static void |
616 | dot_cfi_personality (int ignored ATTRIBUTE_UNUSED) | |
617 | { | |
618 | struct fde_entry *fde; | |
619 | offsetT encoding; | |
620 | ||
621 | if (frchain_now->frch_cfi_data == NULL) | |
622 | { | |
623 | as_bad (_("CFI instruction used without previous .cfi_startproc")); | |
624 | ignore_rest_of_line (); | |
625 | return; | |
626 | } | |
627 | ||
628 | fde = frchain_now->frch_cfi_data->cur_fde_data; | |
629 | encoding = get_absolute_expression (); | |
630 | if (encoding == DW_EH_PE_omit) | |
631 | { | |
632 | demand_empty_rest_of_line (); | |
633 | fde->per_encoding = encoding; | |
634 | return; | |
635 | } | |
636 | ||
637 | if ((encoding & 0xff) != encoding | |
638 | || ((encoding & 0x70) != 0 | |
639 | #if defined DIFF_EXPR_OK || defined tc_cfi_emit_pcrel_expr | |
640 | && (encoding & 0x70) != DW_EH_PE_pcrel | |
641 | #endif | |
642 | ) | |
643 | /* leb128 can be handled, but does something actually need it? */ | |
644 | || (encoding & 7) == DW_EH_PE_uleb128 | |
645 | || (encoding & 7) > DW_EH_PE_udata8) | |
646 | { | |
647 | as_bad (_("invalid or unsupported encoding in .cfi_personality")); | |
648 | ignore_rest_of_line (); | |
649 | return; | |
650 | } | |
651 | ||
652 | if (*input_line_pointer++ != ',') | |
653 | { | |
654 | as_bad (_(".cfi_personality requires encoding and symbol arguments")); | |
655 | ignore_rest_of_line (); | |
656 | return; | |
657 | } | |
658 | ||
659 | expression_and_evaluate (&fde->personality); | |
660 | switch (fde->personality.X_op) | |
661 | { | |
662 | case O_symbol: | |
663 | break; | |
664 | case O_constant: | |
665 | if ((encoding & 0x70) == DW_EH_PE_pcrel) | |
666 | encoding = DW_EH_PE_omit; | |
667 | break; | |
668 | default: | |
669 | encoding = DW_EH_PE_omit; | |
670 | break; | |
671 | } | |
672 | ||
673 | fde->per_encoding = encoding; | |
674 | ||
675 | if (encoding == DW_EH_PE_omit) | |
676 | { | |
677 | as_bad (_("wrong second argument to .cfi_personality")); | |
678 | ignore_rest_of_line (); | |
679 | return; | |
680 | } | |
681 | ||
682 | demand_empty_rest_of_line (); | |
683 | } | |
684 | ||
685 | static void | |
686 | dot_cfi_lsda (int ignored ATTRIBUTE_UNUSED) | |
687 | { | |
688 | struct fde_entry *fde; | |
689 | offsetT encoding; | |
690 | ||
691 | if (frchain_now->frch_cfi_data == NULL) | |
692 | { | |
693 | as_bad (_("CFI instruction used without previous .cfi_startproc")); | |
694 | ignore_rest_of_line (); | |
695 | return; | |
696 | } | |
697 | ||
698 | fde = frchain_now->frch_cfi_data->cur_fde_data; | |
699 | encoding = get_absolute_expression (); | |
700 | if (encoding == DW_EH_PE_omit) | |
701 | { | |
702 | demand_empty_rest_of_line (); | |
703 | fde->lsda_encoding = encoding; | |
704 | return; | |
705 | } | |
706 | ||
707 | if ((encoding & 0xff) != encoding | |
708 | || ((encoding & 0x70) != 0 | |
709 | #if defined DIFF_EXPR_OK || defined tc_cfi_emit_pcrel_expr | |
710 | && (encoding & 0x70) != DW_EH_PE_pcrel | |
711 | #endif | |
712 | ) | |
713 | /* leb128 can be handled, but does something actually need it? */ | |
714 | || (encoding & 7) == DW_EH_PE_uleb128 | |
715 | || (encoding & 7) > DW_EH_PE_udata8) | |
716 | { | |
717 | as_bad (_("invalid or unsupported encoding in .cfi_lsda")); | |
718 | ignore_rest_of_line (); | |
719 | return; | |
720 | } | |
721 | ||
722 | if (*input_line_pointer++ != ',') | |
723 | { | |
724 | as_bad (_(".cfi_lsda requires encoding and symbol arguments")); | |
725 | ignore_rest_of_line (); | |
726 | return; | |
727 | } | |
728 | ||
729 | fde->lsda_encoding = encoding; | |
730 | ||
731 | expression_and_evaluate (&fde->lsda); | |
732 | switch (fde->lsda.X_op) | |
733 | { | |
734 | case O_symbol: | |
735 | break; | |
736 | case O_constant: | |
737 | if ((encoding & 0x70) == DW_EH_PE_pcrel) | |
738 | encoding = DW_EH_PE_omit; | |
739 | break; | |
740 | default: | |
741 | encoding = DW_EH_PE_omit; | |
742 | break; | |
743 | } | |
744 | ||
745 | fde->lsda_encoding = encoding; | |
746 | ||
747 | if (encoding == DW_EH_PE_omit) | |
748 | { | |
749 | as_bad (_("wrong second argument to .cfi_lsda")); | |
750 | ignore_rest_of_line (); | |
751 | return; | |
752 | } | |
753 | ||
754 | demand_empty_rest_of_line (); | |
755 | } | |
756 | ||
54cfded0 | 757 | static void |
a4447b93 | 758 | dot_cfi_startproc (int ignored ATTRIBUTE_UNUSED) |
54cfded0 | 759 | { |
a4447b93 | 760 | int simple = 0; |
39b82151 | 761 | |
ae424f82 | 762 | if (frchain_now->frch_cfi_data != NULL) |
54cfded0 AM |
763 | { |
764 | as_bad (_("previous CFI entry not closed (missing .cfi_endproc)")); | |
7c9c8381 | 765 | ignore_rest_of_line (); |
54cfded0 AM |
766 | return; |
767 | } | |
768 | ||
a4447b93 | 769 | cfi_new_fde (symbol_temp_new_now ()); |
39b82151 | 770 | |
a4447b93 RH |
771 | SKIP_WHITESPACE (); |
772 | if (is_name_beginner (*input_line_pointer)) | |
773 | { | |
774 | char *name, c; | |
54cfded0 | 775 | |
a4447b93 RH |
776 | name = input_line_pointer; |
777 | c = get_symbol_end (); | |
54cfded0 | 778 | |
a4447b93 RH |
779 | if (strcmp (name, "simple") == 0) |
780 | { | |
781 | simple = 1; | |
782 | *input_line_pointer = c; | |
783 | } | |
784 | else | |
785 | input_line_pointer = name; | |
786 | } | |
787 | demand_empty_rest_of_line (); | |
788 | ||
ae424f82 | 789 | frchain_now->frch_cfi_data->cur_cfa_offset = 0; |
a4447b93 | 790 | if (!simple) |
39b82151 | 791 | tc_cfi_frame_initial_instructions (); |
54cfded0 AM |
792 | } |
793 | ||
a4447b93 RH |
794 | static void |
795 | dot_cfi_endproc (int ignored ATTRIBUTE_UNUSED) | |
796 | { | |
ae424f82 | 797 | if (frchain_now->frch_cfi_data == NULL) |
a4447b93 RH |
798 | { |
799 | as_bad (_(".cfi_endproc without corresponding .cfi_startproc")); | |
7c9c8381 | 800 | ignore_rest_of_line (); |
a4447b93 RH |
801 | return; |
802 | } | |
54cfded0 | 803 | |
a4447b93 | 804 | cfi_end_fde (symbol_temp_new_now ()); |
7c9c8381 JB |
805 | |
806 | demand_empty_rest_of_line (); | |
a4447b93 | 807 | } |
39b82151 | 808 | |
a4447b93 RH |
809 | \f |
810 | /* Emit a single byte into the current segment. */ | |
54cfded0 | 811 | |
a4447b93 RH |
812 | static inline void |
813 | out_one (int byte) | |
54cfded0 | 814 | { |
a4447b93 RH |
815 | FRAG_APPEND_1_CHAR (byte); |
816 | } | |
54cfded0 | 817 | |
a4447b93 | 818 | /* Emit a two-byte word into the current segment. */ |
54cfded0 | 819 | |
a4447b93 RH |
820 | static inline void |
821 | out_two (int data) | |
822 | { | |
823 | md_number_to_chars (frag_more (2), data, 2); | |
824 | } | |
54cfded0 | 825 | |
a4447b93 | 826 | /* Emit a four byte word into the current segment. */ |
54cfded0 | 827 | |
a4447b93 RH |
828 | static inline void |
829 | out_four (int data) | |
830 | { | |
831 | md_number_to_chars (frag_more (4), data, 4); | |
832 | } | |
833 | ||
834 | /* Emit an unsigned "little-endian base 128" number. */ | |
54cfded0 | 835 | |
a4447b93 RH |
836 | static void |
837 | out_uleb128 (addressT value) | |
838 | { | |
839 | output_leb128 (frag_more (sizeof_leb128 (value, 0)), value, 0); | |
54cfded0 AM |
840 | } |
841 | ||
a4447b93 RH |
842 | /* Emit an unsigned "little-endian base 128" number. */ |
843 | ||
844 | static void | |
845 | out_sleb128 (offsetT value) | |
54cfded0 | 846 | { |
a4447b93 RH |
847 | output_leb128 (frag_more (sizeof_leb128 (value, 1)), value, 1); |
848 | } | |
54cfded0 | 849 | |
a4447b93 RH |
850 | static void |
851 | output_cfi_insn (struct cfi_insn_data *insn) | |
852 | { | |
853 | offsetT offset; | |
854 | unsigned int regno; | |
54cfded0 | 855 | |
a4447b93 | 856 | switch (insn->insn) |
54cfded0 | 857 | { |
a4447b93 RH |
858 | case DW_CFA_advance_loc: |
859 | { | |
860 | symbolS *from = insn->u.ll.lab1; | |
861 | symbolS *to = insn->u.ll.lab2; | |
862 | ||
863 | if (symbol_get_frag (to) == symbol_get_frag (from)) | |
864 | { | |
865 | addressT delta = S_GET_VALUE (to) - S_GET_VALUE (from); | |
866 | addressT scaled = delta / DWARF2_LINE_MIN_INSN_LENGTH; | |
867 | ||
868 | if (scaled <= 0x3F) | |
869 | out_one (DW_CFA_advance_loc + scaled); | |
870 | else if (delta <= 0xFF) | |
871 | { | |
9b8ae42e JJ |
872 | out_one (DW_CFA_advance_loc1); |
873 | out_one (delta); | |
a4447b93 RH |
874 | } |
875 | else if (delta <= 0xFFFF) | |
876 | { | |
9b8ae42e JJ |
877 | out_one (DW_CFA_advance_loc2); |
878 | out_two (delta); | |
a4447b93 RH |
879 | } |
880 | else | |
881 | { | |
9b8ae42e JJ |
882 | out_one (DW_CFA_advance_loc4); |
883 | out_four (delta); | |
a4447b93 RH |
884 | } |
885 | } | |
886 | else | |
887 | { | |
888 | expressionS exp; | |
889 | ||
890 | exp.X_op = O_subtract; | |
891 | exp.X_add_symbol = to; | |
892 | exp.X_op_symbol = from; | |
893 | exp.X_add_number = 0; | |
894 | ||
895 | /* The code in ehopt.c expects that one byte of the encoding | |
896 | is already allocated to the frag. This comes from the way | |
897 | that it scans the .eh_frame section looking first for the | |
898 | .byte DW_CFA_advance_loc4. */ | |
899 | frag_more (1); | |
900 | ||
901 | frag_var (rs_cfa, 4, 0, DWARF2_LINE_MIN_INSN_LENGTH << 3, | |
902 | make_expr_symbol (&exp), frag_now_fix () - 1, | |
903 | (char *) frag_now); | |
904 | } | |
905 | } | |
906 | break; | |
907 | ||
908 | case DW_CFA_def_cfa: | |
909 | offset = insn->u.ri.offset; | |
910 | if (offset < 0) | |
54cfded0 | 911 | { |
a4447b93 RH |
912 | out_one (DW_CFA_def_cfa_sf); |
913 | out_uleb128 (insn->u.ri.reg); | |
dcb45a06 | 914 | out_sleb128 (offset / DWARF2_CIE_DATA_ALIGNMENT); |
54cfded0 AM |
915 | } |
916 | else | |
917 | { | |
a4447b93 RH |
918 | out_one (DW_CFA_def_cfa); |
919 | out_uleb128 (insn->u.ri.reg); | |
920 | out_uleb128 (offset); | |
54cfded0 AM |
921 | } |
922 | break; | |
923 | ||
a4447b93 | 924 | case DW_CFA_def_cfa_register: |
2be24b54 ML |
925 | case DW_CFA_undefined: |
926 | case DW_CFA_same_value: | |
927 | out_one (insn->insn); | |
928 | out_uleb128 (insn->u.r); | |
54cfded0 AM |
929 | break; |
930 | ||
a4447b93 RH |
931 | case DW_CFA_def_cfa_offset: |
932 | offset = insn->u.i; | |
933 | if (offset < 0) | |
934 | { | |
935 | out_one (DW_CFA_def_cfa_offset_sf); | |
dcb45a06 | 936 | out_sleb128 (offset / DWARF2_CIE_DATA_ALIGNMENT); |
a4447b93 RH |
937 | } |
938 | else | |
939 | { | |
940 | out_one (DW_CFA_def_cfa_offset); | |
941 | out_uleb128 (offset); | |
942 | } | |
54cfded0 AM |
943 | break; |
944 | ||
2be24b54 ML |
945 | case DW_CFA_restore: |
946 | regno = insn->u.r; | |
947 | if (regno <= 0x3F) | |
948 | { | |
949 | out_one (DW_CFA_restore + regno); | |
950 | } | |
951 | else | |
952 | { | |
953 | out_one (DW_CFA_restore_extended); | |
954 | out_uleb128 (regno); | |
955 | } | |
956 | break; | |
957 | ||
a4447b93 RH |
958 | case DW_CFA_offset: |
959 | regno = insn->u.ri.reg; | |
960 | offset = insn->u.ri.offset / DWARF2_CIE_DATA_ALIGNMENT; | |
961 | if (offset < 0) | |
962 | { | |
1233ae62 | 963 | out_one (DW_CFA_offset_extended_sf); |
a4447b93 RH |
964 | out_uleb128 (regno); |
965 | out_sleb128 (offset); | |
966 | } | |
967 | else if (regno <= 0x3F) | |
968 | { | |
969 | out_one (DW_CFA_offset + regno); | |
970 | out_uleb128 (offset); | |
971 | } | |
54cfded0 AM |
972 | else |
973 | { | |
a4447b93 RH |
974 | out_one (DW_CFA_offset_extended); |
975 | out_uleb128 (regno); | |
976 | out_uleb128 (offset); | |
54cfded0 | 977 | } |
54cfded0 AM |
978 | break; |
979 | ||
a4447b93 RH |
980 | case DW_CFA_register: |
981 | out_one (DW_CFA_register); | |
982 | out_uleb128 (insn->u.rr.reg1); | |
983 | out_uleb128 (insn->u.rr.reg2); | |
39b82151 ML |
984 | break; |
985 | ||
2be24b54 ML |
986 | case DW_CFA_remember_state: |
987 | case DW_CFA_restore_state: | |
2be24b54 | 988 | out_one (insn->insn); |
54cfded0 AM |
989 | break; |
990 | ||
364b6d8b JJ |
991 | case DW_CFA_GNU_window_save: |
992 | out_one (DW_CFA_GNU_window_save); | |
993 | break; | |
994 | ||
cdfbf930 RH |
995 | case CFI_escape: |
996 | { | |
997 | struct cfi_escape_data *e; | |
998 | for (e = insn->u.esc; e ; e = e->next) | |
999 | emit_expr (&e->exp, 1); | |
1000 | break; | |
1001 | } | |
1002 | ||
54cfded0 | 1003 | default: |
a4447b93 | 1004 | abort (); |
54cfded0 | 1005 | } |
54cfded0 AM |
1006 | } |
1007 | ||
9b8ae42e JJ |
1008 | static offsetT |
1009 | encoding_size (unsigned char encoding) | |
1010 | { | |
1011 | if (encoding == DW_EH_PE_omit) | |
1012 | return 0; | |
1013 | switch (encoding & 0x7) | |
1014 | { | |
1015 | case 0: | |
1016 | return bfd_get_arch_size (stdoutput) == 64 ? 8 : 4; | |
1017 | case DW_EH_PE_udata2: | |
1018 | return 2; | |
1019 | case DW_EH_PE_udata4: | |
1020 | return 4; | |
1021 | case DW_EH_PE_udata8: | |
1022 | return 8; | |
1023 | default: | |
1024 | abort (); | |
1025 | } | |
1026 | } | |
1027 | ||
54cfded0 | 1028 | static void |
a4447b93 | 1029 | output_cie (struct cie_entry *cie) |
54cfded0 | 1030 | { |
a4447b93 | 1031 | symbolS *after_size_address, *end_address; |
7c0295b1 | 1032 | expressionS exp; |
a4447b93 | 1033 | struct cfi_insn_data *i; |
9b8ae42e | 1034 | offsetT augmentation_size; |
a4447b93 RH |
1035 | |
1036 | cie->start_address = symbol_temp_new_now (); | |
1037 | after_size_address = symbol_temp_make (); | |
1038 | end_address = symbol_temp_make (); | |
1039 | ||
1040 | exp.X_op = O_subtract; | |
1041 | exp.X_add_symbol = end_address; | |
1042 | exp.X_op_symbol = after_size_address; | |
1043 | exp.X_add_number = 0; | |
1044 | ||
289040ca | 1045 | emit_expr (&exp, 4); /* Length. */ |
a4447b93 | 1046 | symbol_set_value_now (after_size_address); |
289040ca NC |
1047 | out_four (0); /* CIE id. */ |
1048 | out_one (DW_CIE_VERSION); /* Version. */ | |
1049 | out_one ('z'); /* Augmentation. */ | |
9b8ae42e JJ |
1050 | if (cie->per_encoding != DW_EH_PE_omit) |
1051 | out_one ('P'); | |
1052 | if (cie->lsda_encoding != DW_EH_PE_omit) | |
1053 | out_one ('L'); | |
a4447b93 | 1054 | out_one ('R'); |
63752a75 JJ |
1055 | if (cie->signal_frame) |
1056 | out_one ('S'); | |
a4447b93 | 1057 | out_one (0); |
289040ca NC |
1058 | out_uleb128 (DWARF2_LINE_MIN_INSN_LENGTH); /* Code alignment. */ |
1059 | out_sleb128 (DWARF2_CIE_DATA_ALIGNMENT); /* Data alignment. */ | |
0da76f83 NC |
1060 | if (DW_CIE_VERSION == 1) /* Return column. */ |
1061 | out_one (cie->return_column); | |
1062 | else | |
1063 | out_uleb128 (cie->return_column); | |
9b8ae42e JJ |
1064 | augmentation_size = 1 + (cie->lsda_encoding != DW_EH_PE_omit); |
1065 | if (cie->per_encoding != DW_EH_PE_omit) | |
1066 | augmentation_size += 1 + encoding_size (cie->per_encoding); | |
1067 | out_uleb128 (augmentation_size); /* Augmentation size. */ | |
1068 | if (cie->per_encoding != DW_EH_PE_omit) | |
1069 | { | |
1070 | offsetT size = encoding_size (cie->per_encoding); | |
1071 | out_one (cie->per_encoding); | |
1072 | exp = cie->personality; | |
1073 | if ((cie->per_encoding & 0x70) == DW_EH_PE_pcrel) | |
1074 | { | |
1075 | #ifdef DIFF_EXPR_OK | |
1076 | exp.X_op = O_subtract; | |
1077 | exp.X_op_symbol = symbol_temp_new_now (); | |
1078 | emit_expr (&exp, size); | |
1079 | #elif defined (tc_cfi_emit_pcrel_expr) | |
1080 | tc_cfi_emit_pcrel_expr (&exp, size); | |
1081 | #else | |
1082 | abort (); | |
1083 | #endif | |
1084 | } | |
1085 | else | |
1086 | emit_expr (&exp, size); | |
1087 | } | |
1088 | if (cie->lsda_encoding != DW_EH_PE_omit) | |
1089 | out_one (cie->lsda_encoding); | |
364b6d8b | 1090 | #if defined DIFF_EXPR_OK || defined tc_cfi_emit_pcrel_expr |
a4447b93 | 1091 | out_one (DW_EH_PE_pcrel | DW_EH_PE_sdata4); |
364b6d8b JJ |
1092 | #else |
1093 | out_one (DW_EH_PE_sdata4); | |
1094 | #endif | |
a4447b93 RH |
1095 | |
1096 | if (cie->first) | |
1097 | for (i = cie->first; i != cie->last; i = i->next) | |
1098 | output_cfi_insn (i); | |
1099 | ||
4df6ce47 | 1100 | frag_align (2, DW_CFA_nop, 0); |
a4447b93 RH |
1101 | symbol_set_value_now (end_address); |
1102 | } | |
54cfded0 | 1103 | |
a4447b93 RH |
1104 | static void |
1105 | output_fde (struct fde_entry *fde, struct cie_entry *cie, | |
9393cb0d | 1106 | struct cfi_insn_data *first, int align) |
a4447b93 RH |
1107 | { |
1108 | symbolS *after_size_address, *end_address; | |
1109 | expressionS exp; | |
9b8ae42e | 1110 | offsetT augmentation_size; |
54cfded0 | 1111 | |
a4447b93 RH |
1112 | after_size_address = symbol_temp_make (); |
1113 | end_address = symbol_temp_make (); | |
54cfded0 | 1114 | |
a4447b93 RH |
1115 | exp.X_op = O_subtract; |
1116 | exp.X_add_symbol = end_address; | |
1117 | exp.X_op_symbol = after_size_address; | |
1118 | exp.X_add_number = 0; | |
289040ca | 1119 | emit_expr (&exp, 4); /* Length. */ |
a4447b93 | 1120 | symbol_set_value_now (after_size_address); |
54cfded0 | 1121 | |
a4447b93 RH |
1122 | exp.X_add_symbol = after_size_address; |
1123 | exp.X_op_symbol = cie->start_address; | |
289040ca | 1124 | emit_expr (&exp, 4); /* CIE offset. */ |
364b6d8b | 1125 | |
9b8ae42e | 1126 | #ifdef DIFF_EXPR_OK |
a4447b93 RH |
1127 | exp.X_add_symbol = fde->start_address; |
1128 | exp.X_op_symbol = symbol_temp_new_now (); | |
289040ca | 1129 | emit_expr (&exp, 4); /* Code offset. */ |
364b6d8b JJ |
1130 | #else |
1131 | exp.X_op = O_symbol; | |
1132 | exp.X_add_symbol = fde->start_address; | |
1133 | exp.X_op_symbol = NULL; | |
1134 | #ifdef tc_cfi_emit_pcrel_expr | |
289040ca | 1135 | tc_cfi_emit_pcrel_expr (&exp, 4); /* Code offset. */ |
364b6d8b | 1136 | #else |
289040ca | 1137 | emit_expr (&exp, 4); /* Code offset. */ |
364b6d8b JJ |
1138 | #endif |
1139 | exp.X_op = O_subtract; | |
1140 | #endif | |
54cfded0 | 1141 | |
a4447b93 | 1142 | exp.X_add_symbol = fde->end_address; |
289040ca | 1143 | exp.X_op_symbol = fde->start_address; /* Code length. */ |
a4447b93 | 1144 | emit_expr (&exp, 4); |
54cfded0 | 1145 | |
9b8ae42e JJ |
1146 | augmentation_size = encoding_size (fde->lsda_encoding); |
1147 | out_uleb128 (augmentation_size); /* Augmentation size. */ | |
1148 | ||
1149 | if (fde->lsda_encoding != DW_EH_PE_omit) | |
1150 | { | |
1151 | exp = fde->lsda; | |
1152 | if ((fde->lsda_encoding & 0x70) == DW_EH_PE_pcrel) | |
1153 | { | |
1154 | #ifdef DIFF_EXPR_OK | |
1155 | exp.X_op = O_subtract; | |
1156 | exp.X_op_symbol = symbol_temp_new_now (); | |
1157 | emit_expr (&exp, augmentation_size); | |
1158 | #elif defined (tc_cfi_emit_pcrel_expr) | |
1159 | tc_cfi_emit_pcrel_expr (&exp, augmentation_size); | |
1160 | #else | |
1161 | abort (); | |
1162 | #endif | |
1163 | } | |
1164 | else | |
1165 | emit_expr (&exp, augmentation_size); | |
1166 | } | |
39b82151 | 1167 | |
a4447b93 RH |
1168 | for (; first; first = first->next) |
1169 | output_cfi_insn (first); | |
39b82151 | 1170 | |
4df6ce47 | 1171 | frag_align (align, DW_CFA_nop, 0); |
a4447b93 RH |
1172 | symbol_set_value_now (end_address); |
1173 | } | |
1174 | ||
1175 | static struct cie_entry * | |
1176 | select_cie_for_fde (struct fde_entry *fde, struct cfi_insn_data **pfirst) | |
1177 | { | |
1178 | struct cfi_insn_data *i, *j; | |
1179 | struct cie_entry *cie; | |
1180 | ||
1181 | for (cie = cie_root; cie; cie = cie->next) | |
39b82151 | 1182 | { |
63752a75 | 1183 | if (cie->return_column != fde->return_column |
9b8ae42e JJ |
1184 | || cie->signal_frame != fde->signal_frame |
1185 | || cie->per_encoding != fde->per_encoding | |
1186 | || cie->lsda_encoding != fde->lsda_encoding) | |
a4447b93 | 1187 | continue; |
9b8ae42e JJ |
1188 | if (cie->per_encoding != DW_EH_PE_omit) |
1189 | { | |
1190 | if (cie->personality.X_op != fde->personality.X_op | |
1191 | || cie->personality.X_add_number | |
1192 | != fde->personality.X_add_number) | |
1193 | continue; | |
1194 | switch (cie->personality.X_op) | |
1195 | { | |
1196 | case O_constant: | |
1197 | if (cie->personality.X_unsigned != fde->personality.X_unsigned) | |
1198 | continue; | |
1199 | break; | |
1200 | case O_symbol: | |
1201 | if (cie->personality.X_add_symbol | |
1202 | != fde->personality.X_add_symbol) | |
1203 | continue; | |
1204 | break; | |
1205 | default: | |
1206 | abort (); | |
1207 | } | |
1208 | } | |
a4447b93 RH |
1209 | for (i = cie->first, j = fde->data; |
1210 | i != cie->last && j != NULL; | |
1211 | i = i->next, j = j->next) | |
39b82151 | 1212 | { |
a4447b93 RH |
1213 | if (i->insn != j->insn) |
1214 | goto fail; | |
1215 | switch (i->insn) | |
1216 | { | |
1217 | case DW_CFA_advance_loc: | |
289040ca NC |
1218 | case DW_CFA_remember_state: |
1219 | /* We reached the first advance/remember in the FDE, | |
1220 | but did not reach the end of the CIE list. */ | |
a4447b93 RH |
1221 | goto fail; |
1222 | ||
1223 | case DW_CFA_offset: | |
1224 | case DW_CFA_def_cfa: | |
1225 | if (i->u.ri.reg != j->u.ri.reg) | |
1226 | goto fail; | |
1227 | if (i->u.ri.offset != j->u.ri.offset) | |
1228 | goto fail; | |
1229 | break; | |
1230 | ||
1231 | case DW_CFA_register: | |
1232 | if (i->u.rr.reg1 != j->u.rr.reg1) | |
1233 | goto fail; | |
1234 | if (i->u.rr.reg2 != j->u.rr.reg2) | |
1235 | goto fail; | |
1236 | break; | |
1237 | ||
1238 | case DW_CFA_def_cfa_register: | |
2be24b54 ML |
1239 | case DW_CFA_restore: |
1240 | case DW_CFA_undefined: | |
1241 | case DW_CFA_same_value: | |
a4447b93 RH |
1242 | if (i->u.r != j->u.r) |
1243 | goto fail; | |
1244 | break; | |
1245 | ||
1246 | case DW_CFA_def_cfa_offset: | |
1247 | if (i->u.i != j->u.i) | |
1248 | goto fail; | |
1249 | break; | |
1250 | ||
cdfbf930 RH |
1251 | case CFI_escape: |
1252 | /* Don't bother matching these for now. */ | |
1253 | goto fail; | |
1254 | ||
a4447b93 RH |
1255 | default: |
1256 | abort (); | |
1257 | } | |
39b82151 | 1258 | } |
a4447b93 RH |
1259 | |
1260 | /* Success if we reached the end of the CIE list, and we've either | |
289040ca NC |
1261 | run out of FDE entries or we've encountered an advance, |
1262 | remember, or escape. */ | |
e9fad691 AM |
1263 | if (i == cie->last |
1264 | && (!j | |
1265 | || j->insn == DW_CFA_advance_loc | |
289040ca | 1266 | || j->insn == DW_CFA_remember_state |
e9fad691 | 1267 | || j->insn == CFI_escape)) |
39b82151 | 1268 | { |
a4447b93 RH |
1269 | *pfirst = j; |
1270 | return cie; | |
39b82151 ML |
1271 | } |
1272 | ||
a4447b93 | 1273 | fail:; |
54cfded0 AM |
1274 | } |
1275 | ||
a4447b93 RH |
1276 | cie = xmalloc (sizeof (struct cie_entry)); |
1277 | cie->next = cie_root; | |
1278 | cie_root = cie; | |
1279 | cie->return_column = fde->return_column; | |
63752a75 | 1280 | cie->signal_frame = fde->signal_frame; |
9b8ae42e JJ |
1281 | cie->per_encoding = fde->per_encoding; |
1282 | cie->lsda_encoding = fde->lsda_encoding; | |
1283 | cie->personality = fde->personality; | |
a4447b93 | 1284 | cie->first = fde->data; |
54cfded0 | 1285 | |
a4447b93 | 1286 | for (i = cie->first; i ; i = i->next) |
e9fad691 | 1287 | if (i->insn == DW_CFA_advance_loc |
289040ca | 1288 | || i->insn == DW_CFA_remember_state |
e9fad691 | 1289 | || i->insn == CFI_escape) |
a4447b93 | 1290 | break; |
54cfded0 | 1291 | |
a4447b93 RH |
1292 | cie->last = i; |
1293 | *pfirst = i; | |
1294 | ||
1295 | output_cie (cie); | |
54cfded0 | 1296 | |
a4447b93 | 1297 | return cie; |
54cfded0 AM |
1298 | } |
1299 | ||
1300 | void | |
a4447b93 | 1301 | cfi_finish (void) |
54cfded0 | 1302 | { |
a4447b93 RH |
1303 | segT cfi_seg; |
1304 | struct fde_entry *fde; | |
eafbc43f | 1305 | int save_flag_traditional_format; |
54cfded0 | 1306 | |
a4447b93 RH |
1307 | if (all_fde_data == 0) |
1308 | return; | |
54cfded0 | 1309 | |
a4447b93 RH |
1310 | /* Open .eh_frame section. */ |
1311 | cfi_seg = subseg_new (".eh_frame", 0); | |
a4447b93 | 1312 | bfd_set_section_flags (stdoutput, cfi_seg, |
757bc393 | 1313 | SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_READONLY); |
a4447b93 | 1314 | subseg_set (cfi_seg, 0); |
9393cb0d | 1315 | record_alignment (cfi_seg, EH_FRAME_ALIGNMENT); |
54cfded0 | 1316 | |
eafbc43f RH |
1317 | /* Make sure check_eh_frame doesn't do anything with our output. */ |
1318 | save_flag_traditional_format = flag_traditional_format; | |
1319 | flag_traditional_format = 1; | |
1320 | ||
a4447b93 RH |
1321 | for (fde = all_fde_data; fde ; fde = fde->next) |
1322 | { | |
1323 | struct cfi_insn_data *first; | |
1324 | struct cie_entry *cie; | |
1325 | ||
ae424f82 JJ |
1326 | if (fde->end_address == NULL) |
1327 | { | |
1328 | as_bad (_("open CFI at the end of file; missing .cfi_endproc directive")); | |
1329 | fde->end_address = fde->start_address; | |
1330 | } | |
1331 | ||
a4447b93 | 1332 | cie = select_cie_for_fde (fde, &first); |
6ec51dba | 1333 | output_fde (fde, cie, first, fde->next == NULL ? EH_FRAME_ALIGNMENT : 2); |
a4447b93 | 1334 | } |
eafbc43f RH |
1335 | |
1336 | flag_traditional_format = save_flag_traditional_format; | |
54cfded0 | 1337 | } |
0a7b15ff JB |
1338 | |
1339 | #else /* TARGET_USE_CFIPOP */ | |
1340 | void | |
1341 | cfi_finish (void) | |
1342 | { | |
1343 | } | |
1344 | #endif /* TARGET_USE_CFIPOP */ |