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1 | /* Dwarf2 assembler output helper routines. | |
2 | Copyright (C) 2001-2024 Free Software Foundation, Inc. | |
3 | ||
4 | This file is part of GCC. | |
5 | ||
6 | GCC is free software; you can redistribute it and/or modify it under | |
7 | the terms of the GNU General Public License as published by the Free | |
8 | Software Foundation; either version 3, or (at your option) any later | |
9 | version. | |
10 | ||
11 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY | |
12 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
13 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
14 | for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with GCC; see the file COPYING3. If not see | |
18 | <http://www.gnu.org/licenses/>. */ | |
19 | ||
20 | ||
21 | #include "config.h" | |
22 | #include "system.h" | |
23 | #include "coretypes.h" | |
24 | #include "target.h" | |
25 | #include "rtl.h" | |
26 | #include "tree.h" | |
27 | #include "memmodel.h" | |
28 | #include "tm_p.h" | |
29 | #include "stringpool.h" | |
30 | #include "varasm.h" | |
31 | #include "output.h" | |
32 | #include "dwarf2asm.h" | |
33 | #include "dwarf2.h" | |
34 | #include "function.h" | |
35 | #include "emit-rtl.h" | |
36 | #include "fold-const.h" | |
37 | ||
38 | #ifndef XCOFF_DEBUGGING_INFO | |
39 | #define XCOFF_DEBUGGING_INFO 0 | |
40 | #endif | |
41 | ||
42 | \f | |
43 | /* Output an unaligned integer with the given value and size. Prefer not | |
44 | to print a newline, since the caller may want to add a comment. */ | |
45 | ||
46 | void | |
47 | dw2_assemble_integer (int size, rtx x) | |
48 | { | |
49 | if (size == 2 * (int) DWARF2_ADDR_SIZE && !CONST_SCALAR_INT_P (x)) | |
50 | { | |
51 | /* On 32-bit targets with -gdwarf64, DImode values with | |
52 | relocations usually result in assembler errors. Assume | |
53 | all such values are positive and emit the relocation only | |
54 | in the least significant half. */ | |
55 | const char *op = integer_asm_op (DWARF2_ADDR_SIZE, false); | |
56 | if (BYTES_BIG_ENDIAN) | |
57 | { | |
58 | if (op) | |
59 | { | |
60 | fputs (op, asm_out_file); | |
61 | fprint_whex (asm_out_file, 0); | |
62 | fputs (", ", asm_out_file); | |
63 | output_addr_const (asm_out_file, x); | |
64 | } | |
65 | else | |
66 | { | |
67 | assemble_integer (const0_rtx, DWARF2_ADDR_SIZE, | |
68 | BITS_PER_UNIT, 1); | |
69 | putc ('\n', asm_out_file); | |
70 | assemble_integer (x, DWARF2_ADDR_SIZE, | |
71 | BITS_PER_UNIT, 1); | |
72 | } | |
73 | } | |
74 | else | |
75 | { | |
76 | if (op) | |
77 | { | |
78 | fputs (op, asm_out_file); | |
79 | output_addr_const (asm_out_file, x); | |
80 | fputs (", ", asm_out_file); | |
81 | fprint_whex (asm_out_file, 0); | |
82 | } | |
83 | else | |
84 | { | |
85 | assemble_integer (x, DWARF2_ADDR_SIZE, | |
86 | BITS_PER_UNIT, 1); | |
87 | putc ('\n', asm_out_file); | |
88 | assemble_integer (const0_rtx, DWARF2_ADDR_SIZE, | |
89 | BITS_PER_UNIT, 1); | |
90 | } | |
91 | } | |
92 | return; | |
93 | } | |
94 | ||
95 | const char *op = integer_asm_op (size, false); | |
96 | ||
97 | if (op) | |
98 | { | |
99 | fputs (op, asm_out_file); | |
100 | if (CONST_INT_P (x)) | |
101 | fprint_whex (asm_out_file, (unsigned HOST_WIDE_INT) INTVAL (x)); | |
102 | else | |
103 | output_addr_const (asm_out_file, x); | |
104 | } | |
105 | else | |
106 | assemble_integer (x, size, BITS_PER_UNIT, 1); | |
107 | } | |
108 | ||
109 | ||
110 | /* Output a value of a given size in target byte order. */ | |
111 | ||
112 | void | |
113 | dw2_asm_output_data_raw (int size, unsigned HOST_WIDE_INT value) | |
114 | { | |
115 | unsigned char bytes[8]; | |
116 | int i; | |
117 | ||
118 | for (i = 0; i < 8; ++i) | |
119 | { | |
120 | bytes[i] = value & 0xff; | |
121 | value >>= 8; | |
122 | } | |
123 | ||
124 | if (BYTES_BIG_ENDIAN) | |
125 | { | |
126 | for (i = size - 1; i > 0; --i) | |
127 | fprintf (asm_out_file, "%#x,", bytes[i]); | |
128 | fprintf (asm_out_file, "%#x", bytes[0]); | |
129 | } | |
130 | else | |
131 | { | |
132 | for (i = 0; i < size - 1; ++i) | |
133 | fprintf (asm_out_file, "%#x,", bytes[i]); | |
134 | fprintf (asm_out_file, "%#x", bytes[i]); | |
135 | } | |
136 | } | |
137 | ||
138 | /* Output an immediate constant in a given SIZE in bytes. */ | |
139 | ||
140 | void | |
141 | dw2_asm_output_data (int size, unsigned HOST_WIDE_INT value, | |
142 | const char *comment, ...) | |
143 | { | |
144 | va_list ap; | |
145 | const char *op = integer_asm_op (size, false); | |
146 | ||
147 | va_start (ap, comment); | |
148 | ||
149 | if (size * 8 < HOST_BITS_PER_WIDE_INT) | |
150 | value &= ~(HOST_WIDE_INT_M1U << (size * 8)); | |
151 | ||
152 | if (op) | |
153 | { | |
154 | fputs (op, asm_out_file); | |
155 | fprint_whex (asm_out_file, value); | |
156 | } | |
157 | else | |
158 | assemble_integer (GEN_INT (value), size, BITS_PER_UNIT, 1); | |
159 | ||
160 | if (flag_debug_asm && comment) | |
161 | { | |
162 | fputs ("\t" ASM_COMMENT_START " ", asm_out_file); | |
163 | vfprintf (asm_out_file, comment, ap); | |
164 | } | |
165 | putc ('\n', asm_out_file); | |
166 | ||
167 | va_end (ap); | |
168 | } | |
169 | ||
170 | /* Output the difference between two symbols in a given size. */ | |
171 | /* ??? There appear to be assemblers that do not like such | |
172 | subtraction, but do support ASM_SET_OP. It's unfortunately | |
173 | impossible to do here, since the ASM_SET_OP for the difference | |
174 | symbol must appear after both symbols are defined. */ | |
175 | ||
176 | void | |
177 | dw2_asm_output_delta (int size, const char *lab1, const char *lab2, | |
178 | const char *comment, ...) | |
179 | { | |
180 | va_list ap; | |
181 | ||
182 | va_start (ap, comment); | |
183 | ||
184 | #ifdef ASM_OUTPUT_DWARF_DELTA | |
185 | ASM_OUTPUT_DWARF_DELTA (asm_out_file, size, lab1, lab2); | |
186 | #else | |
187 | dw2_assemble_integer (size, | |
188 | gen_rtx_MINUS (Pmode, | |
189 | gen_rtx_SYMBOL_REF (Pmode, lab1), | |
190 | gen_rtx_SYMBOL_REF (Pmode, lab2))); | |
191 | #endif | |
192 | if (flag_debug_asm && comment) | |
193 | { | |
194 | fprintf (asm_out_file, "\t%s ", ASM_COMMENT_START); | |
195 | vfprintf (asm_out_file, comment, ap); | |
196 | } | |
197 | fputc ('\n', asm_out_file); | |
198 | ||
199 | va_end (ap); | |
200 | } | |
201 | ||
202 | #ifdef ASM_OUTPUT_DWARF_VMS_DELTA | |
203 | /* Output the difference between two symbols in instruction units | |
204 | in a given size. */ | |
205 | ||
206 | void | |
207 | dw2_asm_output_vms_delta (int size ATTRIBUTE_UNUSED, | |
208 | const char *lab1, const char *lab2, | |
209 | const char *comment, ...) | |
210 | { | |
211 | va_list ap; | |
212 | ||
213 | va_start (ap, comment); | |
214 | ||
215 | ASM_OUTPUT_DWARF_VMS_DELTA (asm_out_file, size, lab1, lab2); | |
216 | if (flag_debug_asm && comment) | |
217 | { | |
218 | fprintf (asm_out_file, "\t%s ", ASM_COMMENT_START); | |
219 | vfprintf (asm_out_file, comment, ap); | |
220 | } | |
221 | fputc ('\n', asm_out_file); | |
222 | ||
223 | va_end (ap); | |
224 | } | |
225 | #endif | |
226 | ||
227 | /* Output a section-relative reference to a LABEL, which was placed in | |
228 | BASE. In general this can only be done for debugging symbols. | |
229 | E.g. on most targets with the GNU linker, this is accomplished with | |
230 | a direct reference and the knowledge that the debugging section | |
231 | will be placed at VMA 0. Some targets have special relocations for | |
232 | this that we must use. */ | |
233 | ||
234 | void | |
235 | dw2_asm_output_offset (int size, const char *label, | |
236 | section *base ATTRIBUTE_UNUSED, | |
237 | const char *comment, ...) | |
238 | { | |
239 | va_list ap; | |
240 | ||
241 | va_start (ap, comment); | |
242 | ||
243 | #ifdef ASM_OUTPUT_DWARF_OFFSET | |
244 | ASM_OUTPUT_DWARF_OFFSET (asm_out_file, size, label, 0, base); | |
245 | #else | |
246 | dw2_assemble_integer (size, gen_rtx_SYMBOL_REF (Pmode, label)); | |
247 | #endif | |
248 | ||
249 | if (flag_debug_asm && comment) | |
250 | { | |
251 | fprintf (asm_out_file, "\t%s ", ASM_COMMENT_START); | |
252 | vfprintf (asm_out_file, comment, ap); | |
253 | } | |
254 | fputc ('\n', asm_out_file); | |
255 | ||
256 | va_end (ap); | |
257 | } | |
258 | ||
259 | void | |
260 | dw2_asm_output_offset (int size, const char *label, HOST_WIDE_INT offset, | |
261 | section *base ATTRIBUTE_UNUSED, | |
262 | const char *comment, ...) | |
263 | { | |
264 | va_list ap; | |
265 | ||
266 | va_start (ap, comment); | |
267 | ||
268 | #ifdef ASM_OUTPUT_DWARF_OFFSET | |
269 | ASM_OUTPUT_DWARF_OFFSET (asm_out_file, size, label, offset, base); | |
270 | #else | |
271 | dw2_assemble_integer (size, gen_rtx_PLUS (Pmode, | |
272 | gen_rtx_SYMBOL_REF (Pmode, label), | |
273 | gen_int_mode (offset, Pmode))); | |
274 | #endif | |
275 | ||
276 | if (flag_debug_asm && comment) | |
277 | { | |
278 | fprintf (asm_out_file, "\t%s ", ASM_COMMENT_START); | |
279 | vfprintf (asm_out_file, comment, ap); | |
280 | } | |
281 | fputc ('\n', asm_out_file); | |
282 | ||
283 | va_end (ap); | |
284 | } | |
285 | ||
286 | #if 0 | |
287 | ||
288 | /* Output a self-relative reference to a label, possibly in a | |
289 | different section or object file. */ | |
290 | ||
291 | void | |
292 | dw2_asm_output_pcrel (int size ATTRIBUTE_UNUSED, | |
293 | const char *label ATTRIBUTE_UNUSED, | |
294 | const char *comment, ...) | |
295 | { | |
296 | va_list ap; | |
297 | ||
298 | va_start (ap, comment); | |
299 | ||
300 | #ifdef ASM_OUTPUT_DWARF_PCREL | |
301 | ASM_OUTPUT_DWARF_PCREL (asm_out_file, size, label); | |
302 | #else | |
303 | dw2_assemble_integer (size, | |
304 | gen_rtx_MINUS (Pmode, | |
305 | gen_rtx_SYMBOL_REF (Pmode, label), | |
306 | pc_rtx)); | |
307 | #endif | |
308 | ||
309 | if (flag_debug_asm && comment) | |
310 | { | |
311 | fprintf (asm_out_file, "\t%s ", ASM_COMMENT_START); | |
312 | vfprintf (asm_out_file, comment, ap); | |
313 | } | |
314 | fputc ('\n', asm_out_file); | |
315 | ||
316 | va_end (ap); | |
317 | } | |
318 | #endif /* 0 */ | |
319 | ||
320 | /* Output an absolute reference to a label. */ | |
321 | ||
322 | void | |
323 | dw2_asm_output_addr (int size, const char *label, | |
324 | const char *comment, ...) | |
325 | { | |
326 | va_list ap; | |
327 | ||
328 | va_start (ap, comment); | |
329 | ||
330 | dw2_assemble_integer (size, gen_rtx_SYMBOL_REF (Pmode, label)); | |
331 | ||
332 | if (flag_debug_asm && comment) | |
333 | { | |
334 | fprintf (asm_out_file, "\t%s ", ASM_COMMENT_START); | |
335 | vfprintf (asm_out_file, comment, ap); | |
336 | } | |
337 | fputc ('\n', asm_out_file); | |
338 | ||
339 | va_end (ap); | |
340 | } | |
341 | ||
342 | /* Similar, but use an RTX expression instead of a text label. */ | |
343 | ||
344 | void | |
345 | dw2_asm_output_addr_rtx (int size, rtx addr, | |
346 | const char *comment, ...) | |
347 | { | |
348 | va_list ap; | |
349 | ||
350 | va_start (ap, comment); | |
351 | ||
352 | dw2_assemble_integer (size, addr); | |
353 | ||
354 | if (flag_debug_asm && comment) | |
355 | { | |
356 | fprintf (asm_out_file, "\t%s ", ASM_COMMENT_START); | |
357 | vfprintf (asm_out_file, comment, ap); | |
358 | } | |
359 | fputc ('\n', asm_out_file); | |
360 | ||
361 | va_end (ap); | |
362 | } | |
363 | ||
364 | /* Output the first ORIG_LEN characters of STR as a string. | |
365 | If ORIG_LEN is equal to -1, ignore this parameter and output | |
366 | the entire STR instead. | |
367 | If COMMENT is not NULL and comments in the debug information | |
368 | have been requested by the user, append the given COMMENT | |
369 | to the generated output. */ | |
370 | ||
371 | void | |
372 | dw2_asm_output_nstring (const char *str, size_t orig_len, | |
373 | const char *comment, ...) | |
374 | { | |
375 | size_t i, len; | |
376 | va_list ap; | |
377 | ||
378 | va_start (ap, comment); | |
379 | ||
380 | len = orig_len; | |
381 | ||
382 | if (len == (size_t) -1) | |
383 | len = strlen (str); | |
384 | ||
385 | if (flag_debug_asm && comment) | |
386 | { | |
387 | if (XCOFF_DEBUGGING_INFO) | |
388 | fputs ("\t.byte \"", asm_out_file); | |
389 | else | |
390 | fputs ("\t.ascii \"", asm_out_file); | |
391 | ||
392 | for (i = 0; i < len; i++) | |
393 | { | |
394 | int c = str[i]; | |
395 | if (c == '\"') | |
396 | fputc (XCOFF_DEBUGGING_INFO ? '\"' : '\\', asm_out_file); | |
397 | else if (c == '\\') | |
398 | fputc ('\\', asm_out_file); | |
399 | if (ISPRINT (c)) | |
400 | fputc (c, asm_out_file); | |
401 | else | |
402 | fprintf (asm_out_file, "\\%o", c); | |
403 | } | |
404 | fprintf (asm_out_file, "\\0\"\t%s ", ASM_COMMENT_START); | |
405 | vfprintf (asm_out_file, comment, ap); | |
406 | fputc ('\n', asm_out_file); | |
407 | } | |
408 | else | |
409 | { | |
410 | /* If an explicit length was given, we can't assume there | |
411 | is a null termination in the string buffer. */ | |
412 | if (orig_len == (size_t) -1) | |
413 | len += 1; | |
414 | ASM_OUTPUT_ASCII (asm_out_file, str, len); | |
415 | if (orig_len != (size_t) -1) | |
416 | assemble_integer (const0_rtx, 1, BITS_PER_UNIT, 1); | |
417 | } | |
418 | ||
419 | va_end (ap); | |
420 | } | |
421 | \f | |
422 | ||
423 | /* Return the size of an unsigned LEB128 quantity. */ | |
424 | ||
425 | int | |
426 | size_of_uleb128 (unsigned HOST_WIDE_INT value) | |
427 | { | |
428 | int size = 0; | |
429 | ||
430 | do | |
431 | { | |
432 | value >>= 7; | |
433 | size += 1; | |
434 | } | |
435 | while (value != 0); | |
436 | ||
437 | return size; | |
438 | } | |
439 | ||
440 | /* Return the size of a signed LEB128 quantity. */ | |
441 | ||
442 | int | |
443 | size_of_sleb128 (HOST_WIDE_INT value) | |
444 | { | |
445 | int size = 0, byte; | |
446 | ||
447 | do | |
448 | { | |
449 | byte = (value & 0x7f); | |
450 | value >>= 7; | |
451 | size += 1; | |
452 | } | |
453 | while (!((value == 0 && (byte & 0x40) == 0) | |
454 | || (value == -1 && (byte & 0x40) != 0))); | |
455 | ||
456 | return size; | |
457 | } | |
458 | ||
459 | /* Given an encoding, return the number of bytes the format occupies. | |
460 | This is only defined for fixed-size encodings, and so does not | |
461 | include leb128. */ | |
462 | ||
463 | int | |
464 | size_of_encoded_value (int encoding) | |
465 | { | |
466 | if (encoding == DW_EH_PE_omit) | |
467 | return 0; | |
468 | ||
469 | switch (encoding & 0x07) | |
470 | { | |
471 | case DW_EH_PE_absptr: | |
472 | return POINTER_SIZE_UNITS; | |
473 | case DW_EH_PE_udata2: | |
474 | return 2; | |
475 | case DW_EH_PE_udata4: | |
476 | return 4; | |
477 | case DW_EH_PE_udata8: | |
478 | return 8; | |
479 | default: | |
480 | gcc_unreachable (); | |
481 | } | |
482 | } | |
483 | ||
484 | /* Yield a name for a given pointer encoding. */ | |
485 | ||
486 | const char * | |
487 | eh_data_format_name (int format) | |
488 | { | |
489 | #if HAVE_DESIGNATED_INITIALIZERS | |
490 | #define S(p, v) [p] = v, | |
491 | #else | |
492 | #define S(p, v) case p: return v; | |
493 | #endif | |
494 | ||
495 | #if HAVE_DESIGNATED_INITIALIZERS | |
496 | __extension__ static const char * const format_names[256] = { | |
497 | #else | |
498 | switch (format) { | |
499 | #endif | |
500 | ||
501 | S(DW_EH_PE_absptr, "absolute") | |
502 | S(DW_EH_PE_omit, "omit") | |
503 | S(DW_EH_PE_aligned, "aligned absolute") | |
504 | ||
505 | S(DW_EH_PE_uleb128, "uleb128") | |
506 | S(DW_EH_PE_udata2, "udata2") | |
507 | S(DW_EH_PE_udata4, "udata4") | |
508 | S(DW_EH_PE_udata8, "udata8") | |
509 | S(DW_EH_PE_sleb128, "sleb128") | |
510 | S(DW_EH_PE_sdata2, "sdata2") | |
511 | S(DW_EH_PE_sdata4, "sdata4") | |
512 | S(DW_EH_PE_sdata8, "sdata8") | |
513 | ||
514 | S(DW_EH_PE_absptr | DW_EH_PE_pcrel, "pcrel") | |
515 | S(DW_EH_PE_uleb128 | DW_EH_PE_pcrel, "pcrel uleb128") | |
516 | S(DW_EH_PE_udata2 | DW_EH_PE_pcrel, "pcrel udata2") | |
517 | S(DW_EH_PE_udata4 | DW_EH_PE_pcrel, "pcrel udata4") | |
518 | S(DW_EH_PE_udata8 | DW_EH_PE_pcrel, "pcrel udata8") | |
519 | S(DW_EH_PE_sleb128 | DW_EH_PE_pcrel, "pcrel sleb128") | |
520 | S(DW_EH_PE_sdata2 | DW_EH_PE_pcrel, "pcrel sdata2") | |
521 | S(DW_EH_PE_sdata4 | DW_EH_PE_pcrel, "pcrel sdata4") | |
522 | S(DW_EH_PE_sdata8 | DW_EH_PE_pcrel, "pcrel sdata8") | |
523 | ||
524 | S(DW_EH_PE_absptr | DW_EH_PE_textrel, "textrel") | |
525 | S(DW_EH_PE_uleb128 | DW_EH_PE_textrel, "textrel uleb128") | |
526 | S(DW_EH_PE_udata2 | DW_EH_PE_textrel, "textrel udata2") | |
527 | S(DW_EH_PE_udata4 | DW_EH_PE_textrel, "textrel udata4") | |
528 | S(DW_EH_PE_udata8 | DW_EH_PE_textrel, "textrel udata8") | |
529 | S(DW_EH_PE_sleb128 | DW_EH_PE_textrel, "textrel sleb128") | |
530 | S(DW_EH_PE_sdata2 | DW_EH_PE_textrel, "textrel sdata2") | |
531 | S(DW_EH_PE_sdata4 | DW_EH_PE_textrel, "textrel sdata4") | |
532 | S(DW_EH_PE_sdata8 | DW_EH_PE_textrel, "textrel sdata8") | |
533 | ||
534 | S(DW_EH_PE_absptr | DW_EH_PE_datarel, "datarel") | |
535 | S(DW_EH_PE_uleb128 | DW_EH_PE_datarel, "datarel uleb128") | |
536 | S(DW_EH_PE_udata2 | DW_EH_PE_datarel, "datarel udata2") | |
537 | S(DW_EH_PE_udata4 | DW_EH_PE_datarel, "datarel udata4") | |
538 | S(DW_EH_PE_udata8 | DW_EH_PE_datarel, "datarel udata8") | |
539 | S(DW_EH_PE_sleb128 | DW_EH_PE_datarel, "datarel sleb128") | |
540 | S(DW_EH_PE_sdata2 | DW_EH_PE_datarel, "datarel sdata2") | |
541 | S(DW_EH_PE_sdata4 | DW_EH_PE_datarel, "datarel sdata4") | |
542 | S(DW_EH_PE_sdata8 | DW_EH_PE_datarel, "datarel sdata8") | |
543 | ||
544 | S(DW_EH_PE_absptr | DW_EH_PE_funcrel, "funcrel") | |
545 | S(DW_EH_PE_uleb128 | DW_EH_PE_funcrel, "funcrel uleb128") | |
546 | S(DW_EH_PE_udata2 | DW_EH_PE_funcrel, "funcrel udata2") | |
547 | S(DW_EH_PE_udata4 | DW_EH_PE_funcrel, "funcrel udata4") | |
548 | S(DW_EH_PE_udata8 | DW_EH_PE_funcrel, "funcrel udata8") | |
549 | S(DW_EH_PE_sleb128 | DW_EH_PE_funcrel, "funcrel sleb128") | |
550 | S(DW_EH_PE_sdata2 | DW_EH_PE_funcrel, "funcrel sdata2") | |
551 | S(DW_EH_PE_sdata4 | DW_EH_PE_funcrel, "funcrel sdata4") | |
552 | S(DW_EH_PE_sdata8 | DW_EH_PE_funcrel, "funcrel sdata8") | |
553 | ||
554 | S(DW_EH_PE_indirect | DW_EH_PE_absptr, "indirect absolute") | |
555 | ||
556 | S(DW_EH_PE_indirect | DW_EH_PE_absptr | DW_EH_PE_pcrel, | |
557 | "indirect pcrel") | |
558 | S(DW_EH_PE_indirect | DW_EH_PE_uleb128 | DW_EH_PE_pcrel, | |
559 | "indirect pcrel uleb128") | |
560 | S(DW_EH_PE_indirect | DW_EH_PE_udata2 | DW_EH_PE_pcrel, | |
561 | "indirect pcrel udata2") | |
562 | S(DW_EH_PE_indirect | DW_EH_PE_udata4 | DW_EH_PE_pcrel, | |
563 | "indirect pcrel udata4") | |
564 | S(DW_EH_PE_indirect | DW_EH_PE_udata8 | DW_EH_PE_pcrel, | |
565 | "indirect pcrel udata8") | |
566 | S(DW_EH_PE_indirect | DW_EH_PE_sleb128 | DW_EH_PE_pcrel, | |
567 | "indirect pcrel sleb128") | |
568 | S(DW_EH_PE_indirect | DW_EH_PE_sdata2 | DW_EH_PE_pcrel, | |
569 | "indirect pcrel sdata2") | |
570 | S(DW_EH_PE_indirect | DW_EH_PE_sdata4 | DW_EH_PE_pcrel, | |
571 | "indirect pcrel sdata4") | |
572 | S(DW_EH_PE_indirect | DW_EH_PE_sdata8 | DW_EH_PE_pcrel, | |
573 | "indirect pcrel sdata8") | |
574 | ||
575 | S(DW_EH_PE_indirect | DW_EH_PE_absptr | DW_EH_PE_textrel, | |
576 | "indirect textrel") | |
577 | S(DW_EH_PE_indirect | DW_EH_PE_uleb128 | DW_EH_PE_textrel, | |
578 | "indirect textrel uleb128") | |
579 | S(DW_EH_PE_indirect | DW_EH_PE_udata2 | DW_EH_PE_textrel, | |
580 | "indirect textrel udata2") | |
581 | S(DW_EH_PE_indirect | DW_EH_PE_udata4 | DW_EH_PE_textrel, | |
582 | "indirect textrel udata4") | |
583 | S(DW_EH_PE_indirect | DW_EH_PE_udata8 | DW_EH_PE_textrel, | |
584 | "indirect textrel udata8") | |
585 | S(DW_EH_PE_indirect | DW_EH_PE_sleb128 | DW_EH_PE_textrel, | |
586 | "indirect textrel sleb128") | |
587 | S(DW_EH_PE_indirect | DW_EH_PE_sdata2 | DW_EH_PE_textrel, | |
588 | "indirect textrel sdata2") | |
589 | S(DW_EH_PE_indirect | DW_EH_PE_sdata4 | DW_EH_PE_textrel, | |
590 | "indirect textrel sdata4") | |
591 | S(DW_EH_PE_indirect | DW_EH_PE_sdata8 | DW_EH_PE_textrel, | |
592 | "indirect textrel sdata8") | |
593 | ||
594 | S(DW_EH_PE_indirect | DW_EH_PE_absptr | DW_EH_PE_datarel, | |
595 | "indirect datarel") | |
596 | S(DW_EH_PE_indirect | DW_EH_PE_uleb128 | DW_EH_PE_datarel, | |
597 | "indirect datarel uleb128") | |
598 | S(DW_EH_PE_indirect | DW_EH_PE_udata2 | DW_EH_PE_datarel, | |
599 | "indirect datarel udata2") | |
600 | S(DW_EH_PE_indirect | DW_EH_PE_udata4 | DW_EH_PE_datarel, | |
601 | "indirect datarel udata4") | |
602 | S(DW_EH_PE_indirect | DW_EH_PE_udata8 | DW_EH_PE_datarel, | |
603 | "indirect datarel udata8") | |
604 | S(DW_EH_PE_indirect | DW_EH_PE_sleb128 | DW_EH_PE_datarel, | |
605 | "indirect datarel sleb128") | |
606 | S(DW_EH_PE_indirect | DW_EH_PE_sdata2 | DW_EH_PE_datarel, | |
607 | "indirect datarel sdata2") | |
608 | S(DW_EH_PE_indirect | DW_EH_PE_sdata4 | DW_EH_PE_datarel, | |
609 | "indirect datarel sdata4") | |
610 | S(DW_EH_PE_indirect | DW_EH_PE_sdata8 | DW_EH_PE_datarel, | |
611 | "indirect datarel sdata8") | |
612 | ||
613 | S(DW_EH_PE_indirect | DW_EH_PE_absptr | DW_EH_PE_funcrel, | |
614 | "indirect funcrel") | |
615 | S(DW_EH_PE_indirect | DW_EH_PE_uleb128 | DW_EH_PE_funcrel, | |
616 | "indirect funcrel uleb128") | |
617 | S(DW_EH_PE_indirect | DW_EH_PE_udata2 | DW_EH_PE_funcrel, | |
618 | "indirect funcrel udata2") | |
619 | S(DW_EH_PE_indirect | DW_EH_PE_udata4 | DW_EH_PE_funcrel, | |
620 | "indirect funcrel udata4") | |
621 | S(DW_EH_PE_indirect | DW_EH_PE_udata8 | DW_EH_PE_funcrel, | |
622 | "indirect funcrel udata8") | |
623 | S(DW_EH_PE_indirect | DW_EH_PE_sleb128 | DW_EH_PE_funcrel, | |
624 | "indirect funcrel sleb128") | |
625 | S(DW_EH_PE_indirect | DW_EH_PE_sdata2 | DW_EH_PE_funcrel, | |
626 | "indirect funcrel sdata2") | |
627 | S(DW_EH_PE_indirect | DW_EH_PE_sdata4 | DW_EH_PE_funcrel, | |
628 | "indirect funcrel sdata4") | |
629 | S(DW_EH_PE_indirect | DW_EH_PE_sdata8 | DW_EH_PE_funcrel, | |
630 | "indirect funcrel sdata8") | |
631 | ||
632 | #if HAVE_DESIGNATED_INITIALIZERS | |
633 | }; | |
634 | ||
635 | gcc_assert (format >= 0 && format < 0x100 && format_names[format]); | |
636 | ||
637 | return format_names[format]; | |
638 | #else | |
639 | } | |
640 | gcc_unreachable (); | |
641 | #endif | |
642 | } | |
643 | ||
644 | /* Output an unsigned LEB128 quantity, but only the byte values. */ | |
645 | ||
646 | void | |
647 | dw2_asm_output_data_uleb128_raw (unsigned HOST_WIDE_INT value) | |
648 | { | |
649 | while (1) | |
650 | { | |
651 | int byte = (value & 0x7f); | |
652 | value >>= 7; | |
653 | if (value != 0) | |
654 | /* More bytes to follow. */ | |
655 | byte |= 0x80; | |
656 | ||
657 | fprintf (asm_out_file, "%#x", byte); | |
658 | if (value == 0) | |
659 | break; | |
660 | fputc (',', asm_out_file); | |
661 | } | |
662 | } | |
663 | ||
664 | /* Output an unsigned LEB128 quantity. */ | |
665 | ||
666 | void | |
667 | dw2_asm_output_data_uleb128 (unsigned HOST_WIDE_INT value, | |
668 | const char *comment, ...) | |
669 | { | |
670 | va_list ap; | |
671 | ||
672 | va_start (ap, comment); | |
673 | ||
674 | if (HAVE_AS_LEB128) | |
675 | { | |
676 | fputs ("\t.uleb128 ", asm_out_file); | |
677 | fprint_whex (asm_out_file, value); | |
678 | ||
679 | if (flag_debug_asm && comment) | |
680 | { | |
681 | fprintf (asm_out_file, "\t%s ", ASM_COMMENT_START); | |
682 | vfprintf (asm_out_file, comment, ap); | |
683 | } | |
684 | } | |
685 | else | |
686 | { | |
687 | unsigned HOST_WIDE_INT work = value; | |
688 | const char *byte_op = targetm.asm_out.byte_op; | |
689 | ||
690 | if (byte_op) | |
691 | fputs (byte_op, asm_out_file); | |
692 | do | |
693 | { | |
694 | int byte = (work & 0x7f); | |
695 | work >>= 7; | |
696 | if (work != 0) | |
697 | /* More bytes to follow. */ | |
698 | byte |= 0x80; | |
699 | ||
700 | if (byte_op) | |
701 | { | |
702 | fprintf (asm_out_file, "%#x", byte); | |
703 | if (work != 0) | |
704 | fputc (',', asm_out_file); | |
705 | } | |
706 | else | |
707 | assemble_integer (GEN_INT (byte), 1, BITS_PER_UNIT, 1); | |
708 | } | |
709 | while (work != 0); | |
710 | ||
711 | if (flag_debug_asm) | |
712 | { | |
713 | fprintf (asm_out_file, "\t%s uleb128 " HOST_WIDE_INT_PRINT_HEX, | |
714 | ASM_COMMENT_START, value); | |
715 | if (comment) | |
716 | { | |
717 | fputs ("; ", asm_out_file); | |
718 | vfprintf (asm_out_file, comment, ap); | |
719 | } | |
720 | } | |
721 | } | |
722 | ||
723 | putc ('\n', asm_out_file); | |
724 | ||
725 | va_end (ap); | |
726 | } | |
727 | ||
728 | /* Output an signed LEB128 quantity, but only the byte values. */ | |
729 | ||
730 | void | |
731 | dw2_asm_output_data_sleb128_raw (HOST_WIDE_INT value) | |
732 | { | |
733 | int byte, more; | |
734 | ||
735 | while (1) | |
736 | { | |
737 | byte = (value & 0x7f); | |
738 | value >>= 7; | |
739 | more = !((value == 0 && (byte & 0x40) == 0) | |
740 | || (value == -1 && (byte & 0x40) != 0)); | |
741 | if (more) | |
742 | byte |= 0x80; | |
743 | ||
744 | fprintf (asm_out_file, "%#x", byte); | |
745 | if (!more) | |
746 | break; | |
747 | fputc (',', asm_out_file); | |
748 | } | |
749 | } | |
750 | ||
751 | /* Output a signed LEB128 quantity. */ | |
752 | ||
753 | void | |
754 | dw2_asm_output_data_sleb128 (HOST_WIDE_INT value, | |
755 | const char *comment, ...) | |
756 | { | |
757 | va_list ap; | |
758 | ||
759 | va_start (ap, comment); | |
760 | ||
761 | if (HAVE_AS_LEB128) | |
762 | { | |
763 | fprintf (asm_out_file, "\t.sleb128 " HOST_WIDE_INT_PRINT_DEC, value); | |
764 | ||
765 | if (flag_debug_asm && comment) | |
766 | { | |
767 | fprintf (asm_out_file, "\t%s ", ASM_COMMENT_START); | |
768 | vfprintf (asm_out_file, comment, ap); | |
769 | } | |
770 | } | |
771 | else | |
772 | { | |
773 | HOST_WIDE_INT work = value; | |
774 | int more, byte; | |
775 | const char *byte_op = targetm.asm_out.byte_op; | |
776 | ||
777 | if (byte_op) | |
778 | fputs (byte_op, asm_out_file); | |
779 | do | |
780 | { | |
781 | byte = (work & 0x7f); | |
782 | /* arithmetic shift */ | |
783 | work >>= 7; | |
784 | more = !((work == 0 && (byte & 0x40) == 0) | |
785 | || (work == -1 && (byte & 0x40) != 0)); | |
786 | if (more) | |
787 | byte |= 0x80; | |
788 | ||
789 | if (byte_op) | |
790 | { | |
791 | fprintf (asm_out_file, "%#x", byte); | |
792 | if (more) | |
793 | fputc (',', asm_out_file); | |
794 | } | |
795 | else | |
796 | assemble_integer (GEN_INT (byte), 1, BITS_PER_UNIT, 1); | |
797 | } | |
798 | while (more); | |
799 | ||
800 | if (flag_debug_asm) | |
801 | { | |
802 | fprintf (asm_out_file, "\t%s sleb128 " HOST_WIDE_INT_PRINT_DEC, | |
803 | ASM_COMMENT_START, value); | |
804 | if (comment) | |
805 | { | |
806 | fputs ("; ", asm_out_file); | |
807 | vfprintf (asm_out_file, comment, ap); | |
808 | } | |
809 | } | |
810 | } | |
811 | ||
812 | fputc ('\n', asm_out_file); | |
813 | ||
814 | va_end (ap); | |
815 | } | |
816 | ||
817 | /* Output symbol LAB1 as an unsigned LEB128 quantity. LAB1 should be | |
818 | an assembler-computed constant, e.g. a view number, because we | |
819 | can't have relocations in LEB128 quantities. */ | |
820 | ||
821 | void | |
822 | dw2_asm_output_symname_uleb128 (const char *lab1 ATTRIBUTE_UNUSED, | |
823 | const char *comment, ...) | |
824 | { | |
825 | va_list ap; | |
826 | ||
827 | va_start (ap, comment); | |
828 | ||
829 | #ifdef HAVE_AS_LEB128 | |
830 | fputs ("\t.uleb128 ", asm_out_file); | |
831 | assemble_name (asm_out_file, lab1); | |
832 | #else | |
833 | gcc_unreachable (); | |
834 | #endif | |
835 | ||
836 | if (flag_debug_asm && comment) | |
837 | { | |
838 | fprintf (asm_out_file, "\t%s ", ASM_COMMENT_START); | |
839 | vfprintf (asm_out_file, comment, ap); | |
840 | } | |
841 | fputc ('\n', asm_out_file); | |
842 | ||
843 | va_end (ap); | |
844 | } | |
845 | ||
846 | void | |
847 | dw2_asm_output_delta_uleb128 (const char *lab1 ATTRIBUTE_UNUSED, | |
848 | const char *lab2 ATTRIBUTE_UNUSED, | |
849 | const char *comment, ...) | |
850 | { | |
851 | va_list ap; | |
852 | ||
853 | va_start (ap, comment); | |
854 | ||
855 | gcc_assert (HAVE_AS_LEB128); | |
856 | ||
857 | fputs ("\t.uleb128 ", asm_out_file); | |
858 | assemble_name (asm_out_file, lab1); | |
859 | putc ('-', asm_out_file); | |
860 | /* dwarf2out.cc might give us a label expression (e.g. .LVL548-1) | |
861 | as second argument. If so, make it a subexpression, to make | |
862 | sure the substraction is done in the right order. */ | |
863 | if (strchr (lab2, '-') != NULL) | |
864 | { | |
865 | putc ('(', asm_out_file); | |
866 | assemble_name (asm_out_file, lab2); | |
867 | putc (')', asm_out_file); | |
868 | } | |
869 | else | |
870 | assemble_name (asm_out_file, lab2); | |
871 | ||
872 | if (flag_debug_asm && comment) | |
873 | { | |
874 | fprintf (asm_out_file, "\t%s ", ASM_COMMENT_START); | |
875 | vfprintf (asm_out_file, comment, ap); | |
876 | } | |
877 | fputc ('\n', asm_out_file); | |
878 | ||
879 | va_end (ap); | |
880 | } | |
881 | ||
882 | #if 0 | |
883 | ||
884 | void | |
885 | dw2_asm_output_delta_sleb128 (const char *lab1 ATTRIBUTE_UNUSED, | |
886 | const char *lab2 ATTRIBUTE_UNUSED, | |
887 | const char *comment, ...) | |
888 | { | |
889 | va_list ap; | |
890 | ||
891 | va_start (ap, comment); | |
892 | ||
893 | gcc_assert (HAVE_AS_LEB128); | |
894 | ||
895 | fputs ("\t.sleb128 ", asm_out_file); | |
896 | assemble_name (asm_out_file, lab1); | |
897 | putc ('-', asm_out_file); | |
898 | assemble_name (asm_out_file, lab2); | |
899 | ||
900 | if (flag_debug_asm && comment) | |
901 | { | |
902 | fprintf (asm_out_file, "\t%s ", ASM_COMMENT_START); | |
903 | vfprintf (asm_out_file, comment, ap); | |
904 | } | |
905 | fputc ('\n', asm_out_file); | |
906 | ||
907 | va_end (ap); | |
908 | } | |
909 | #endif /* 0 */ | |
910 | \f | |
911 | static GTY(()) hash_map<const char *, tree> *indirect_pool; | |
912 | ||
913 | static GTY(()) int dw2_const_labelno; | |
914 | ||
915 | #if defined(HAVE_GAS_HIDDEN) | |
916 | # define USE_LINKONCE_INDIRECT (SUPPORTS_ONE_ONLY && !XCOFF_DEBUGGING_INFO) | |
917 | #else | |
918 | # define USE_LINKONCE_INDIRECT 0 | |
919 | #endif | |
920 | ||
921 | /* Compare two std::pair<const char *, tree> by their first element. | |
922 | Returns <0, 0, or | |
923 | >0 to indicate whether K1 is less than, equal to, or greater than | |
924 | K2, respectively. */ | |
925 | ||
926 | static int | |
927 | compare_strings (const void *a, const void *b) | |
928 | { | |
929 | const char *s1 = ((const std::pair<const char *, tree> *) a)->first; | |
930 | const char *s2 = ((const std::pair<const char *, tree> *) b)->first; | |
931 | int ret; | |
932 | ||
933 | if (s1 == s2) | |
934 | return 0; | |
935 | ||
936 | ret = strcmp (s1, s2); | |
937 | ||
938 | /* The strings are always those from IDENTIFIER_NODEs, and, | |
939 | therefore, we should never have two copies of the same | |
940 | string. */ | |
941 | gcc_assert (ret); | |
942 | ||
943 | return ret; | |
944 | } | |
945 | ||
946 | /* Put X, a SYMBOL_REF, in memory. Return a SYMBOL_REF to the allocated | |
947 | memory. Differs from force_const_mem in that a single pool is used for | |
948 | the entire unit of translation, and the memory is not guaranteed to be | |
949 | "near" the function in any interesting sense. IS_PUBLIC controls whether | |
950 | the symbol can be shared across the entire application (or DSO). */ | |
951 | ||
952 | rtx | |
953 | dw2_force_const_mem (rtx x, bool is_public) | |
954 | { | |
955 | const char *key; | |
956 | tree decl_id; | |
957 | ||
958 | if (! indirect_pool) | |
959 | indirect_pool = hash_map<const char *, tree>::create_ggc (64); | |
960 | ||
961 | gcc_assert (GET_CODE (x) == SYMBOL_REF); | |
962 | ||
963 | key = XSTR (x, 0); | |
964 | tree *slot = indirect_pool->get (key); | |
965 | if (slot) | |
966 | decl_id = *slot; | |
967 | else | |
968 | { | |
969 | tree id; | |
970 | const char *str = targetm.strip_name_encoding (key); | |
971 | ||
972 | if (is_public && USE_LINKONCE_INDIRECT) | |
973 | { | |
974 | char *ref_name = XALLOCAVEC (char, strlen (str) + sizeof "DW.ref."); | |
975 | ||
976 | sprintf (ref_name, "DW.ref.%s", str); | |
977 | gcc_assert (!maybe_get_identifier (ref_name)); | |
978 | decl_id = get_identifier (ref_name); | |
979 | TREE_PUBLIC (decl_id) = 1; | |
980 | } | |
981 | else | |
982 | { | |
983 | char label[32]; | |
984 | ||
985 | ASM_GENERATE_INTERNAL_LABEL (label, "LDFCM", dw2_const_labelno); | |
986 | ++dw2_const_labelno; | |
987 | gcc_assert (!maybe_get_identifier (label)); | |
988 | decl_id = get_identifier (label); | |
989 | } | |
990 | ||
991 | id = maybe_get_identifier (str); | |
992 | if (id) | |
993 | TREE_SYMBOL_REFERENCED (id) = 1; | |
994 | ||
995 | indirect_pool->put (key, decl_id); | |
996 | } | |
997 | ||
998 | return gen_rtx_SYMBOL_REF (Pmode, IDENTIFIER_POINTER (decl_id)); | |
999 | } | |
1000 | ||
1001 | /* A helper function for dw2_output_indirect_constants. Emit one queued | |
1002 | constant to memory. */ | |
1003 | ||
1004 | static int | |
1005 | dw2_output_indirect_constant_1 (const char *sym, tree id) | |
1006 | { | |
1007 | rtx sym_ref; | |
1008 | tree decl; | |
1009 | ||
1010 | decl = build_decl (UNKNOWN_LOCATION, VAR_DECL, id, ptr_type_node); | |
1011 | SET_DECL_ASSEMBLER_NAME (decl, id); | |
1012 | DECL_ARTIFICIAL (decl) = 1; | |
1013 | DECL_IGNORED_P (decl) = 1; | |
1014 | DECL_INITIAL (decl) = build_fold_addr_expr (decl); | |
1015 | TREE_READONLY (decl) = 1; | |
1016 | TREE_STATIC (decl) = 1; | |
1017 | ||
1018 | if (TREE_PUBLIC (id)) | |
1019 | { | |
1020 | TREE_PUBLIC (decl) = 1; | |
1021 | make_decl_one_only (decl, DECL_ASSEMBLER_NAME (decl)); | |
1022 | if (USE_LINKONCE_INDIRECT) | |
1023 | DECL_VISIBILITY (decl) = VISIBILITY_HIDDEN; | |
1024 | } | |
1025 | ||
1026 | sym_ref = gen_rtx_SYMBOL_REF (Pmode, sym); | |
1027 | /* Disable ASan for decl because redzones cause ABI breakage between GCC and | |
1028 | libstdc++ for `.LDFCM*' variables. See PR 78651 for details. */ | |
1029 | unsigned int save_flag_sanitize = flag_sanitize; | |
1030 | flag_sanitize &= ~(SANITIZE_ADDRESS | SANITIZE_USER_ADDRESS | |
1031 | | SANITIZE_KERNEL_ADDRESS); | |
1032 | /* And also temporarily disable -fsection-anchors. These indirect constants | |
1033 | are never referenced from code, so it doesn't make any sense to aggregate | |
1034 | them in blocks. */ | |
1035 | int save_flag_section_anchors = flag_section_anchors; | |
1036 | flag_section_anchors = 0; | |
1037 | assemble_variable (decl, 1, 1, 1); | |
1038 | flag_section_anchors = save_flag_section_anchors; | |
1039 | flag_sanitize = save_flag_sanitize; | |
1040 | assemble_integer (sym_ref, POINTER_SIZE_UNITS, POINTER_SIZE, 1); | |
1041 | /* The following is a hack recognized by use_blocks_for_decl_p to disable | |
1042 | section anchor handling of the decl. */ | |
1043 | DECL_INITIAL (decl) = decl; | |
1044 | ||
1045 | return 0; | |
1046 | } | |
1047 | ||
1048 | /* Emit the constants queued through dw2_force_const_mem. */ | |
1049 | ||
1050 | void | |
1051 | dw2_output_indirect_constants (void) | |
1052 | { | |
1053 | if (!indirect_pool) | |
1054 | return; | |
1055 | ||
1056 | auto_vec<std::pair<const char *, tree> > temp (indirect_pool->elements ()); | |
1057 | for (hash_map<const char *, tree>::iterator iter = indirect_pool->begin (); | |
1058 | iter != indirect_pool->end (); ++iter) | |
1059 | temp.quick_push (*iter); | |
1060 | ||
1061 | temp.qsort (compare_strings); | |
1062 | ||
1063 | for (unsigned int i = 0; i < temp.length (); i++) | |
1064 | dw2_output_indirect_constant_1 (temp[i].first, temp[i].second); | |
1065 | } | |
1066 | ||
1067 | /* Like dw2_asm_output_addr_rtx, but encode the pointer as directed. | |
1068 | If PUBLIC is set and the encoding is DW_EH_PE_indirect, the indirect | |
1069 | reference is shared across the entire application (or DSO). */ | |
1070 | ||
1071 | void | |
1072 | dw2_asm_output_encoded_addr_rtx (int encoding, rtx addr, bool is_public, | |
1073 | const char *comment, ...) | |
1074 | { | |
1075 | int size; | |
1076 | va_list ap; | |
1077 | ||
1078 | va_start (ap, comment); | |
1079 | ||
1080 | size = size_of_encoded_value (encoding); | |
1081 | ||
1082 | if (encoding == DW_EH_PE_aligned) | |
1083 | { | |
1084 | assemble_align (POINTER_SIZE); | |
1085 | assemble_integer (addr, size, POINTER_SIZE, 1); | |
1086 | va_end (ap); | |
1087 | return; | |
1088 | } | |
1089 | ||
1090 | /* NULL is _always_ represented as a plain zero, as is 1 for Ada's | |
1091 | "all others". */ | |
1092 | if (addr == const0_rtx || addr == const1_rtx) | |
1093 | assemble_integer (addr, size, BITS_PER_UNIT, 1); | |
1094 | else | |
1095 | { | |
1096 | restart: | |
1097 | /* Allow the target first crack at emitting this. Some of the | |
1098 | special relocations require special directives instead of | |
1099 | just ".4byte" or whatever. */ | |
1100 | #ifdef ASM_MAYBE_OUTPUT_ENCODED_ADDR_RTX | |
1101 | ASM_MAYBE_OUTPUT_ENCODED_ADDR_RTX (asm_out_file, encoding, size, | |
1102 | addr, done); | |
1103 | #endif | |
1104 | ||
1105 | /* Indirection is used to get dynamic relocations out of a | |
1106 | read-only section. */ | |
1107 | if (encoding & DW_EH_PE_indirect) | |
1108 | { | |
1109 | /* It is very tempting to use force_const_mem so that we share data | |
1110 | with the normal constant pool. However, we've already emitted | |
1111 | the constant pool for this function. Moreover, we'd like to | |
1112 | share these constants across the entire unit of translation and | |
1113 | even, if possible, across the entire application (or DSO). */ | |
1114 | addr = dw2_force_const_mem (addr, is_public); | |
1115 | encoding &= ~DW_EH_PE_indirect; | |
1116 | goto restart; | |
1117 | } | |
1118 | ||
1119 | switch (encoding & 0xF0) | |
1120 | { | |
1121 | case DW_EH_PE_absptr: | |
1122 | dw2_assemble_integer (size, addr); | |
1123 | break; | |
1124 | ||
1125 | #ifdef ASM_OUTPUT_DWARF_DATAREL | |
1126 | case DW_EH_PE_datarel: | |
1127 | gcc_assert (GET_CODE (addr) == SYMBOL_REF); | |
1128 | ASM_OUTPUT_DWARF_DATAREL (asm_out_file, size, XSTR (addr, 0)); | |
1129 | break; | |
1130 | #endif | |
1131 | ||
1132 | case DW_EH_PE_pcrel: | |
1133 | gcc_assert (GET_CODE (addr) == SYMBOL_REF); | |
1134 | #ifdef ASM_OUTPUT_DWARF_PCREL | |
1135 | ASM_OUTPUT_DWARF_PCREL (asm_out_file, size, XSTR (addr, 0)); | |
1136 | #else | |
1137 | dw2_assemble_integer (size, gen_rtx_MINUS (Pmode, addr, pc_rtx)); | |
1138 | #endif | |
1139 | break; | |
1140 | ||
1141 | default: | |
1142 | /* Other encodings should have been handled by | |
1143 | ASM_MAYBE_OUTPUT_ENCODED_ADDR_RTX. */ | |
1144 | gcc_unreachable (); | |
1145 | } | |
1146 | ||
1147 | #ifdef ASM_MAYBE_OUTPUT_ENCODED_ADDR_RTX | |
1148 | done:; | |
1149 | #endif | |
1150 | } | |
1151 | ||
1152 | if (flag_debug_asm && comment) | |
1153 | { | |
1154 | fprintf (asm_out_file, "\t%s ", ASM_COMMENT_START); | |
1155 | vfprintf (asm_out_file, comment, ap); | |
1156 | } | |
1157 | fputc ('\n', asm_out_file); | |
1158 | ||
1159 | va_end (ap); | |
1160 | } | |
1161 | ||
1162 | #include "gt-dwarf2asm.h" |