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ca98eb0a | 1 | /* Dwarf2 assembler output helper routines. |
2b4876d2 | 2 | Copyright (C) 2001, 2002, 2003, 2004, 2005 Free Software Foundation, Inc. |
ca98eb0a | 3 | |
f12b58b3 | 4 | This file is part of GCC. |
ca98eb0a | 5 | |
f12b58b3 | 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 2, or (at your option) any later | |
9 | version. | |
ca98eb0a | 10 | |
f12b58b3 | 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. | |
ca98eb0a | 15 | |
16 | You should have received a copy of the GNU General Public License | |
f12b58b3 | 17 | along with GCC; see the file COPYING. If not, write to the Free |
18 | Software Foundation, 59 Temple Place - Suite 330, Boston, MA | |
19 | 02111-1307, USA. */ | |
ca98eb0a | 20 | |
21 | ||
22 | #include "config.h" | |
23 | #include "system.h" | |
805e22b2 | 24 | #include "coretypes.h" |
25 | #include "tm.h" | |
ca98eb0a | 26 | #include "flags.h" |
ad5818ae | 27 | #include "tree.h" |
ca98eb0a | 28 | #include "rtl.h" |
29 | #include "output.h" | |
58356836 | 30 | #include "target.h" |
ca98eb0a | 31 | #include "dwarf2asm.h" |
ad5818ae | 32 | #include "dwarf2.h" |
33 | #include "splay-tree.h" | |
34 | #include "ggc.h" | |
ca98eb0a | 35 | #include "tm_p.h" |
36 | ||
37 | ||
38 | /* How to start an assembler comment. */ | |
39 | #ifndef ASM_COMMENT_START | |
40 | #define ASM_COMMENT_START ";#" | |
41 | #endif | |
42 | ||
ca98eb0a | 43 | \f |
58356836 | 44 | /* Output an unaligned integer with the given value and size. Prefer not |
45 | to print a newline, since the caller may want to add a comment. */ | |
46 | ||
47 | void | |
8ec3a57b | 48 | dw2_assemble_integer (int size, rtx x) |
ca98eb0a | 49 | { |
58356836 | 50 | const char *op = integer_asm_op (size, FALSE); |
51 | ||
52 | if (op) | |
ca98eb0a | 53 | { |
58356836 | 54 | fputs (op, asm_out_file); |
55 | if (GET_CODE (x) == CONST_INT) | |
56 | fprintf (asm_out_file, HOST_WIDE_INT_PRINT_HEX, INTVAL (x)); | |
57 | else | |
58 | output_addr_const (asm_out_file, x); | |
ca98eb0a | 59 | } |
58356836 | 60 | else |
61 | assemble_integer (x, size, BITS_PER_UNIT, 1); | |
ca98eb0a | 62 | } |
1eefe280 | 63 | |
ca98eb0a | 64 | |
19e5668c | 65 | /* Output an immediate constant in a given size. */ |
66 | ||
ca98eb0a | 67 | void |
ee582a61 | 68 | dw2_asm_output_data (int size, unsigned HOST_WIDE_INT value, |
69 | const char *comment, ...) | |
ca98eb0a | 70 | { |
ee582a61 | 71 | va_list ap; |
8ec3a57b | 72 | |
ee582a61 | 73 | va_start (ap, comment); |
ca98eb0a | 74 | |
8de0b9f7 | 75 | if (size * 8 < HOST_BITS_PER_WIDE_INT) |
dfe09cce | 76 | value &= ~(~(unsigned HOST_WIDE_INT) 0 << (size * 8)); |
8de0b9f7 | 77 | |
58356836 | 78 | dw2_assemble_integer (size, GEN_INT (value)); |
ca98eb0a | 79 | |
80 | if (flag_debug_asm && comment) | |
81 | { | |
82 | fprintf (asm_out_file, "\t%s ", ASM_COMMENT_START); | |
83 | vfprintf (asm_out_file, comment, ap); | |
84 | } | |
85 | fputc ('\n', asm_out_file); | |
86 | ||
ee582a61 | 87 | va_end (ap); |
ca98eb0a | 88 | } |
89 | ||
19e5668c | 90 | /* Output the difference between two symbols in a given size. */ |
91 | /* ??? There appear to be assemblers that do not like such | |
92 | subtraction, but do support ASM_SET_OP. It's unfortunately | |
93 | impossible to do here, since the ASM_SET_OP for the difference | |
94 | symbol must appear after both symbols are defined. */ | |
95 | ||
ca98eb0a | 96 | void |
ee582a61 | 97 | dw2_asm_output_delta (int size, const char *lab1, const char *lab2, |
98 | const char *comment, ...) | |
ca98eb0a | 99 | { |
ee582a61 | 100 | va_list ap; |
8ec3a57b | 101 | |
ee582a61 | 102 | va_start (ap, comment); |
ca98eb0a | 103 | |
a08b74c8 | 104 | #ifdef ASM_OUTPUT_DWARF_DELTA |
105 | ASM_OUTPUT_DWARF_DELTA (asm_out_file, size, lab1, lab2); | |
106 | #else | |
58356836 | 107 | dw2_assemble_integer (size, |
108 | gen_rtx_MINUS (Pmode, | |
109 | gen_rtx_SYMBOL_REF (Pmode, lab1), | |
110 | gen_rtx_SYMBOL_REF (Pmode, lab2))); | |
a08b74c8 | 111 | #endif |
ca98eb0a | 112 | if (flag_debug_asm && comment) |
113 | { | |
114 | fprintf (asm_out_file, "\t%s ", ASM_COMMENT_START); | |
115 | vfprintf (asm_out_file, comment, ap); | |
116 | } | |
117 | fputc ('\n', asm_out_file); | |
118 | ||
ee582a61 | 119 | va_end (ap); |
ca98eb0a | 120 | } |
121 | ||
19e5668c | 122 | /* Output a section-relative reference to a label. In general this |
123 | can only be done for debugging symbols. E.g. on most targets with | |
124 | the GNU linker, this is accomplished with a direct reference and | |
125 | the knowledge that the debugging section will be placed at VMA 0. | |
126 | Some targets have special relocations for this that we must use. */ | |
127 | ||
ca98eb0a | 128 | void |
ee582a61 | 129 | dw2_asm_output_offset (int size, const char *label, |
130 | const char *comment, ...) | |
ca98eb0a | 131 | { |
ee582a61 | 132 | va_list ap; |
8ec3a57b | 133 | |
ee582a61 | 134 | va_start (ap, comment); |
ca98eb0a | 135 | |
19e5668c | 136 | #ifdef ASM_OUTPUT_DWARF_OFFSET |
137 | ASM_OUTPUT_DWARF_OFFSET (asm_out_file, size, label); | |
138 | #else | |
58356836 | 139 | dw2_assemble_integer (size, gen_rtx_SYMBOL_REF (Pmode, label)); |
ca98eb0a | 140 | #endif |
141 | ||
142 | if (flag_debug_asm && comment) | |
143 | { | |
144 | fprintf (asm_out_file, "\t%s ", ASM_COMMENT_START); | |
145 | vfprintf (asm_out_file, comment, ap); | |
146 | } | |
147 | fputc ('\n', asm_out_file); | |
148 | ||
ee582a61 | 149 | va_end (ap); |
ca98eb0a | 150 | } |
151 | ||
31ac8297 | 152 | #if 0 |
153 | ||
19e5668c | 154 | /* Output a self-relative reference to a label, possibly in a |
155 | different section or object file. */ | |
156 | ||
ca98eb0a | 157 | void |
ee582a61 | 158 | dw2_asm_output_pcrel (int size ATTRIBUTE_UNUSED, |
159 | const char *label ATTRIBUTE_UNUSED, | |
160 | const char *comment, ...) | |
ca98eb0a | 161 | { |
ee582a61 | 162 | va_list ap; |
8ec3a57b | 163 | |
ee582a61 | 164 | va_start (ap, comment); |
ca98eb0a | 165 | |
19e5668c | 166 | #ifdef ASM_OUTPUT_DWARF_PCREL |
167 | ASM_OUTPUT_DWARF_PCREL (asm_out_file, size, label); | |
168 | #else | |
58356836 | 169 | dw2_assemble_integer (size, |
170 | gen_rtx_MINUS (Pmode, | |
171 | gen_rtx_SYMBOL_REF (Pmode, label), | |
172 | pc_rtx)); | |
19e5668c | 173 | #endif |
174 | ||
175 | if (flag_debug_asm && comment) | |
176 | { | |
177 | fprintf (asm_out_file, "\t%s ", ASM_COMMENT_START); | |
178 | vfprintf (asm_out_file, comment, ap); | |
179 | } | |
180 | fputc ('\n', asm_out_file); | |
181 | ||
ee582a61 | 182 | va_end (ap); |
19e5668c | 183 | } |
31ac8297 | 184 | #endif /* 0 */ |
19e5668c | 185 | |
186 | /* Output an absolute reference to a label. */ | |
187 | ||
188 | void | |
ee582a61 | 189 | dw2_asm_output_addr (int size, const char *label, |
190 | const char *comment, ...) | |
19e5668c | 191 | { |
ee582a61 | 192 | va_list ap; |
8ec3a57b | 193 | |
ee582a61 | 194 | va_start (ap, comment); |
19e5668c | 195 | |
58356836 | 196 | dw2_assemble_integer (size, gen_rtx_SYMBOL_REF (Pmode, label)); |
ca98eb0a | 197 | |
198 | if (flag_debug_asm && comment) | |
199 | { | |
200 | fprintf (asm_out_file, "\t%s ", ASM_COMMENT_START); | |
201 | vfprintf (asm_out_file, comment, ap); | |
202 | } | |
203 | fputc ('\n', asm_out_file); | |
204 | ||
ee582a61 | 205 | va_end (ap); |
ca98eb0a | 206 | } |
207 | ||
19e5668c | 208 | /* Similar, but use an RTX expression instead of a text label. */ |
209 | ||
ca98eb0a | 210 | void |
ee582a61 | 211 | dw2_asm_output_addr_rtx (int size, rtx addr, |
212 | const char *comment, ...) | |
ca98eb0a | 213 | { |
ee582a61 | 214 | va_list ap; |
8ec3a57b | 215 | |
ee582a61 | 216 | va_start (ap, comment); |
ca98eb0a | 217 | |
58356836 | 218 | dw2_assemble_integer (size, addr); |
ca98eb0a | 219 | |
220 | if (flag_debug_asm && comment) | |
221 | { | |
222 | fprintf (asm_out_file, "\t%s ", ASM_COMMENT_START); | |
223 | vfprintf (asm_out_file, comment, ap); | |
224 | } | |
225 | fputc ('\n', asm_out_file); | |
226 | ||
ee582a61 | 227 | va_end (ap); |
ca98eb0a | 228 | } |
229 | ||
21f8688e | 230 | /* Output the first ORIG_LEN characters of STR as a string. |
231 | If ORIG_LEN is equal to -1, ignore this parameter and output | |
232 | the entire STR instead. | |
233 | If COMMENT is not NULL and comments in the debug information | |
234 | have been requested by the user, append the given COMMENT | |
235 | to the generated output. */ | |
236 | ||
ca98eb0a | 237 | void |
ee582a61 | 238 | dw2_asm_output_nstring (const char *str, size_t orig_len, |
239 | const char *comment, ...) | |
ca98eb0a | 240 | { |
0903457a | 241 | size_t i, len; |
ee582a61 | 242 | va_list ap; |
ca98eb0a | 243 | |
ee582a61 | 244 | va_start (ap, comment); |
ca98eb0a | 245 | |
0903457a | 246 | len = orig_len; |
ca98eb0a | 247 | |
248 | if (len == (size_t) -1) | |
249 | len = strlen (str); | |
250 | ||
251 | if (flag_debug_asm && comment) | |
252 | { | |
253 | fputs ("\t.ascii \"", asm_out_file); | |
254 | for (i = 0; i < len; i++) | |
255 | { | |
256 | int c = str[i]; | |
257 | if (c == '\"' || c == '\\') | |
258 | fputc ('\\', asm_out_file); | |
259 | if (ISPRINT(c)) | |
260 | fputc (c, asm_out_file); | |
261 | else | |
262 | fprintf (asm_out_file, "\\%o", c); | |
263 | } | |
264 | fprintf (asm_out_file, "\\0\"\t%s ", ASM_COMMENT_START); | |
265 | vfprintf (asm_out_file, comment, ap); | |
266 | fputc ('\n', asm_out_file); | |
267 | } | |
268 | else | |
269 | { | |
270 | /* If an explicit length was given, we can't assume there | |
271 | is a null termination in the string buffer. */ | |
272 | if (orig_len == (size_t) -1) | |
273 | len += 1; | |
274 | ASM_OUTPUT_ASCII (asm_out_file, str, len); | |
275 | if (orig_len != (size_t) -1) | |
58356836 | 276 | assemble_integer (const0_rtx, 1, BITS_PER_UNIT, 1); |
ca98eb0a | 277 | } |
278 | ||
ee582a61 | 279 | va_end (ap); |
ca98eb0a | 280 | } |
281 | \f | |
282 | ||
283 | /* Return the size of an unsigned LEB128 quantity. */ | |
284 | ||
285 | int | |
8ec3a57b | 286 | size_of_uleb128 (unsigned HOST_WIDE_INT value) |
ca98eb0a | 287 | { |
805e22b2 | 288 | int size = 0; |
ca98eb0a | 289 | |
290 | do | |
291 | { | |
ca98eb0a | 292 | value >>= 7; |
293 | size += 1; | |
294 | } | |
295 | while (value != 0); | |
296 | ||
297 | return size; | |
298 | } | |
299 | ||
300 | /* Return the size of a signed LEB128 quantity. */ | |
301 | ||
302 | int | |
8ec3a57b | 303 | size_of_sleb128 (HOST_WIDE_INT value) |
ca98eb0a | 304 | { |
305 | int size = 0, byte; | |
306 | ||
307 | do | |
308 | { | |
309 | byte = (value & 0x7f); | |
310 | value >>= 7; | |
311 | size += 1; | |
312 | } | |
313 | while (!((value == 0 && (byte & 0x40) == 0) | |
314 | || (value == -1 && (byte & 0x40) != 0))); | |
315 | ||
316 | return size; | |
317 | } | |
318 | ||
631413ff | 319 | /* Given an encoding, return the number of bytes the format occupies. |
1eefe280 | 320 | This is only defined for fixed-size encodings, and so does not |
631413ff | 321 | include leb128. */ |
322 | ||
323 | int | |
8ec3a57b | 324 | size_of_encoded_value (int encoding) |
631413ff | 325 | { |
326 | if (encoding == DW_EH_PE_omit) | |
327 | return 0; | |
328 | ||
329 | switch (encoding & 0x07) | |
330 | { | |
331 | case DW_EH_PE_absptr: | |
332 | return POINTER_SIZE / BITS_PER_UNIT; | |
333 | case DW_EH_PE_udata2: | |
334 | return 2; | |
335 | case DW_EH_PE_udata4: | |
336 | return 4; | |
337 | case DW_EH_PE_udata8: | |
338 | return 8; | |
7bd4f6b6 | 339 | default: |
340 | gcc_unreachable (); | |
631413ff | 341 | } |
631413ff | 342 | } |
343 | ||
9b84bf7d | 344 | /* Yield a name for a given pointer encoding. */ |
345 | ||
346 | const char * | |
8ec3a57b | 347 | eh_data_format_name (int format) |
9b84bf7d | 348 | { |
349 | #if HAVE_DESIGNATED_INITIALIZERS | |
350 | #define S(p, v) [p] = v, | |
351 | #else | |
352 | #define S(p, v) case p: return v; | |
353 | #endif | |
354 | ||
355 | #if HAVE_DESIGNATED_INITIALIZERS | |
356 | __extension__ static const char * const format_names[256] = { | |
357 | #else | |
358 | switch (format) { | |
359 | #endif | |
360 | ||
361 | S(DW_EH_PE_absptr, "absolute") | |
362 | S(DW_EH_PE_omit, "omit") | |
9a4d22ba | 363 | S(DW_EH_PE_aligned, "aligned absolute") |
9b84bf7d | 364 | |
365 | S(DW_EH_PE_uleb128, "uleb128") | |
366 | S(DW_EH_PE_udata2, "udata2") | |
367 | S(DW_EH_PE_udata4, "udata4") | |
368 | S(DW_EH_PE_udata8, "udata8") | |
369 | S(DW_EH_PE_sleb128, "sleb128") | |
370 | S(DW_EH_PE_sdata2, "sdata2") | |
371 | S(DW_EH_PE_sdata4, "sdata4") | |
372 | S(DW_EH_PE_sdata8, "sdata8") | |
373 | ||
ffaf0c47 | 374 | S(DW_EH_PE_absptr | DW_EH_PE_pcrel, "pcrel") |
9b84bf7d | 375 | S(DW_EH_PE_uleb128 | DW_EH_PE_pcrel, "pcrel uleb128") |
376 | S(DW_EH_PE_udata2 | DW_EH_PE_pcrel, "pcrel udata2") | |
377 | S(DW_EH_PE_udata4 | DW_EH_PE_pcrel, "pcrel udata4") | |
378 | S(DW_EH_PE_udata8 | DW_EH_PE_pcrel, "pcrel udata8") | |
379 | S(DW_EH_PE_sleb128 | DW_EH_PE_pcrel, "pcrel sleb128") | |
380 | S(DW_EH_PE_sdata2 | DW_EH_PE_pcrel, "pcrel sdata2") | |
381 | S(DW_EH_PE_sdata4 | DW_EH_PE_pcrel, "pcrel sdata4") | |
382 | S(DW_EH_PE_sdata8 | DW_EH_PE_pcrel, "pcrel sdata8") | |
383 | ||
ffaf0c47 | 384 | S(DW_EH_PE_absptr | DW_EH_PE_textrel, "textrel") |
9b84bf7d | 385 | S(DW_EH_PE_uleb128 | DW_EH_PE_textrel, "textrel uleb128") |
386 | S(DW_EH_PE_udata2 | DW_EH_PE_textrel, "textrel udata2") | |
387 | S(DW_EH_PE_udata4 | DW_EH_PE_textrel, "textrel udata4") | |
388 | S(DW_EH_PE_udata8 | DW_EH_PE_textrel, "textrel udata8") | |
389 | S(DW_EH_PE_sleb128 | DW_EH_PE_textrel, "textrel sleb128") | |
390 | S(DW_EH_PE_sdata2 | DW_EH_PE_textrel, "textrel sdata2") | |
391 | S(DW_EH_PE_sdata4 | DW_EH_PE_textrel, "textrel sdata4") | |
392 | S(DW_EH_PE_sdata8 | DW_EH_PE_textrel, "textrel sdata8") | |
393 | ||
ffaf0c47 | 394 | S(DW_EH_PE_absptr | DW_EH_PE_datarel, "datarel") |
9b84bf7d | 395 | S(DW_EH_PE_uleb128 | DW_EH_PE_datarel, "datarel uleb128") |
396 | S(DW_EH_PE_udata2 | DW_EH_PE_datarel, "datarel udata2") | |
397 | S(DW_EH_PE_udata4 | DW_EH_PE_datarel, "datarel udata4") | |
398 | S(DW_EH_PE_udata8 | DW_EH_PE_datarel, "datarel udata8") | |
399 | S(DW_EH_PE_sleb128 | DW_EH_PE_datarel, "datarel sleb128") | |
400 | S(DW_EH_PE_sdata2 | DW_EH_PE_datarel, "datarel sdata2") | |
401 | S(DW_EH_PE_sdata4 | DW_EH_PE_datarel, "datarel sdata4") | |
402 | S(DW_EH_PE_sdata8 | DW_EH_PE_datarel, "datarel sdata8") | |
403 | ||
ffaf0c47 | 404 | S(DW_EH_PE_absptr | DW_EH_PE_funcrel, "funcrel") |
9b84bf7d | 405 | S(DW_EH_PE_uleb128 | DW_EH_PE_funcrel, "funcrel uleb128") |
406 | S(DW_EH_PE_udata2 | DW_EH_PE_funcrel, "funcrel udata2") | |
407 | S(DW_EH_PE_udata4 | DW_EH_PE_funcrel, "funcrel udata4") | |
408 | S(DW_EH_PE_udata8 | DW_EH_PE_funcrel, "funcrel udata8") | |
409 | S(DW_EH_PE_sleb128 | DW_EH_PE_funcrel, "funcrel sleb128") | |
410 | S(DW_EH_PE_sdata2 | DW_EH_PE_funcrel, "funcrel sdata2") | |
411 | S(DW_EH_PE_sdata4 | DW_EH_PE_funcrel, "funcrel sdata4") | |
412 | S(DW_EH_PE_sdata8 | DW_EH_PE_funcrel, "funcrel sdata8") | |
413 | ||
ffaf0c47 | 414 | S(DW_EH_PE_indirect | DW_EH_PE_absptr | DW_EH_PE_pcrel, |
415 | "indirect pcrel") | |
9b84bf7d | 416 | S(DW_EH_PE_indirect | DW_EH_PE_uleb128 | DW_EH_PE_pcrel, |
417 | "indirect pcrel uleb128") | |
418 | S(DW_EH_PE_indirect | DW_EH_PE_udata2 | DW_EH_PE_pcrel, | |
419 | "indirect pcrel udata2") | |
420 | S(DW_EH_PE_indirect | DW_EH_PE_udata4 | DW_EH_PE_pcrel, | |
421 | "indirect pcrel udata4") | |
422 | S(DW_EH_PE_indirect | DW_EH_PE_udata8 | DW_EH_PE_pcrel, | |
423 | "indirect pcrel udata8") | |
424 | S(DW_EH_PE_indirect | DW_EH_PE_sleb128 | DW_EH_PE_pcrel, | |
425 | "indirect pcrel sleb128") | |
426 | S(DW_EH_PE_indirect | DW_EH_PE_sdata2 | DW_EH_PE_pcrel, | |
427 | "indirect pcrel sdata2") | |
428 | S(DW_EH_PE_indirect | DW_EH_PE_sdata4 | DW_EH_PE_pcrel, | |
429 | "indirect pcrel sdata4") | |
430 | S(DW_EH_PE_indirect | DW_EH_PE_sdata8 | DW_EH_PE_pcrel, | |
431 | "indirect pcrel sdata8") | |
432 | ||
ffaf0c47 | 433 | S(DW_EH_PE_indirect | DW_EH_PE_absptr | DW_EH_PE_textrel, |
434 | "indirect textrel") | |
9b84bf7d | 435 | S(DW_EH_PE_indirect | DW_EH_PE_uleb128 | DW_EH_PE_textrel, |
436 | "indirect textrel uleb128") | |
437 | S(DW_EH_PE_indirect | DW_EH_PE_udata2 | DW_EH_PE_textrel, | |
438 | "indirect textrel udata2") | |
439 | S(DW_EH_PE_indirect | DW_EH_PE_udata4 | DW_EH_PE_textrel, | |
440 | "indirect textrel udata4") | |
441 | S(DW_EH_PE_indirect | DW_EH_PE_udata8 | DW_EH_PE_textrel, | |
442 | "indirect textrel udata8") | |
443 | S(DW_EH_PE_indirect | DW_EH_PE_sleb128 | DW_EH_PE_textrel, | |
444 | "indirect textrel sleb128") | |
445 | S(DW_EH_PE_indirect | DW_EH_PE_sdata2 | DW_EH_PE_textrel, | |
446 | "indirect textrel sdata2") | |
447 | S(DW_EH_PE_indirect | DW_EH_PE_sdata4 | DW_EH_PE_textrel, | |
448 | "indirect textrel sdata4") | |
449 | S(DW_EH_PE_indirect | DW_EH_PE_sdata8 | DW_EH_PE_textrel, | |
450 | "indirect textrel sdata8") | |
451 | ||
ffaf0c47 | 452 | S(DW_EH_PE_indirect | DW_EH_PE_absptr | DW_EH_PE_datarel, |
453 | "indirect datarel") | |
9b84bf7d | 454 | S(DW_EH_PE_indirect | DW_EH_PE_uleb128 | DW_EH_PE_datarel, |
455 | "indirect datarel uleb128") | |
456 | S(DW_EH_PE_indirect | DW_EH_PE_udata2 | DW_EH_PE_datarel, | |
457 | "indirect datarel udata2") | |
458 | S(DW_EH_PE_indirect | DW_EH_PE_udata4 | DW_EH_PE_datarel, | |
459 | "indirect datarel udata4") | |
460 | S(DW_EH_PE_indirect | DW_EH_PE_udata8 | DW_EH_PE_datarel, | |
461 | "indirect datarel udata8") | |
462 | S(DW_EH_PE_indirect | DW_EH_PE_sleb128 | DW_EH_PE_datarel, | |
463 | "indirect datarel sleb128") | |
464 | S(DW_EH_PE_indirect | DW_EH_PE_sdata2 | DW_EH_PE_datarel, | |
465 | "indirect datarel sdata2") | |
466 | S(DW_EH_PE_indirect | DW_EH_PE_sdata4 | DW_EH_PE_datarel, | |
467 | "indirect datarel sdata4") | |
468 | S(DW_EH_PE_indirect | DW_EH_PE_sdata8 | DW_EH_PE_datarel, | |
469 | "indirect datarel sdata8") | |
470 | ||
ffaf0c47 | 471 | S(DW_EH_PE_indirect | DW_EH_PE_absptr | DW_EH_PE_funcrel, |
472 | "indirect funcrel") | |
9b84bf7d | 473 | S(DW_EH_PE_indirect | DW_EH_PE_uleb128 | DW_EH_PE_funcrel, |
474 | "indirect funcrel uleb128") | |
475 | S(DW_EH_PE_indirect | DW_EH_PE_udata2 | DW_EH_PE_funcrel, | |
476 | "indirect funcrel udata2") | |
477 | S(DW_EH_PE_indirect | DW_EH_PE_udata4 | DW_EH_PE_funcrel, | |
478 | "indirect funcrel udata4") | |
479 | S(DW_EH_PE_indirect | DW_EH_PE_udata8 | DW_EH_PE_funcrel, | |
480 | "indirect funcrel udata8") | |
481 | S(DW_EH_PE_indirect | DW_EH_PE_sleb128 | DW_EH_PE_funcrel, | |
482 | "indirect funcrel sleb128") | |
483 | S(DW_EH_PE_indirect | DW_EH_PE_sdata2 | DW_EH_PE_funcrel, | |
484 | "indirect funcrel sdata2") | |
485 | S(DW_EH_PE_indirect | DW_EH_PE_sdata4 | DW_EH_PE_funcrel, | |
486 | "indirect funcrel sdata4") | |
487 | S(DW_EH_PE_indirect | DW_EH_PE_sdata8 | DW_EH_PE_funcrel, | |
488 | "indirect funcrel sdata8") | |
489 | ||
490 | #if HAVE_DESIGNATED_INITIALIZERS | |
491 | }; | |
492 | ||
7bd4f6b6 | 493 | gcc_assert (format >= 0 && format < 0x100 && format_names[format]); |
494 | ||
9b84bf7d | 495 | return format_names[format]; |
496 | #else | |
497 | } | |
7bd4f6b6 | 498 | gcc_unreachable (); |
9b84bf7d | 499 | #endif |
500 | } | |
501 | ||
ca98eb0a | 502 | /* Output an unsigned LEB128 quantity. */ |
503 | ||
504 | void | |
ee582a61 | 505 | dw2_asm_output_data_uleb128 (unsigned HOST_WIDE_INT value, |
506 | const char *comment, ...) | |
ca98eb0a | 507 | { |
ee582a61 | 508 | va_list ap; |
8ec3a57b | 509 | |
ee582a61 | 510 | va_start (ap, comment); |
ca98eb0a | 511 | |
512 | #ifdef HAVE_AS_LEB128 | |
85aa12f7 | 513 | fprintf (asm_out_file, "\t.uleb128 " HOST_WIDE_INT_PRINT_HEX , value); |
ca98eb0a | 514 | |
515 | if (flag_debug_asm && comment) | |
516 | { | |
517 | fprintf (asm_out_file, "\t%s ", ASM_COMMENT_START); | |
518 | vfprintf (asm_out_file, comment, ap); | |
519 | } | |
520 | #else | |
521 | { | |
522 | unsigned HOST_WIDE_INT work = value; | |
58356836 | 523 | const char *byte_op = targetm.asm_out.byte_op; |
ca98eb0a | 524 | |
58356836 | 525 | if (byte_op) |
526 | fputs (byte_op, asm_out_file); | |
ca98eb0a | 527 | do |
528 | { | |
529 | int byte = (work & 0x7f); | |
530 | work >>= 7; | |
531 | if (work != 0) | |
532 | /* More bytes to follow. */ | |
533 | byte |= 0x80; | |
534 | ||
58356836 | 535 | if (byte_op) |
536 | { | |
537 | fprintf (asm_out_file, "0x%x", byte); | |
538 | if (work != 0) | |
539 | fputc (',', asm_out_file); | |
540 | } | |
541 | else | |
542 | assemble_integer (GEN_INT (byte), 1, BITS_PER_UNIT, 1); | |
ca98eb0a | 543 | } |
544 | while (work != 0); | |
545 | ||
546 | if (flag_debug_asm) | |
547 | { | |
85aa12f7 | 548 | fprintf (asm_out_file, "\t%s uleb128 " HOST_WIDE_INT_PRINT_HEX, |
549 | ASM_COMMENT_START, value); | |
ca98eb0a | 550 | if (comment) |
551 | { | |
552 | fputs ("; ", asm_out_file); | |
553 | vfprintf (asm_out_file, comment, ap); | |
554 | } | |
555 | } | |
556 | } | |
557 | #endif | |
558 | fputc ('\n', asm_out_file); | |
559 | ||
ee582a61 | 560 | va_end (ap); |
ca98eb0a | 561 | } |
562 | ||
edc2a478 | 563 | /* Output a signed LEB128 quantity. */ |
ca98eb0a | 564 | |
565 | void | |
ee582a61 | 566 | dw2_asm_output_data_sleb128 (HOST_WIDE_INT value, |
567 | const char *comment, ...) | |
ca98eb0a | 568 | { |
ee582a61 | 569 | va_list ap; |
8ec3a57b | 570 | |
ee582a61 | 571 | va_start (ap, comment); |
ca98eb0a | 572 | |
573 | #ifdef HAVE_AS_LEB128 | |
85aa12f7 | 574 | fprintf (asm_out_file, "\t.sleb128 " HOST_WIDE_INT_PRINT_DEC, value); |
ca98eb0a | 575 | |
576 | if (flag_debug_asm && comment) | |
577 | { | |
578 | fprintf (asm_out_file, "\t%s ", ASM_COMMENT_START); | |
579 | vfprintf (asm_out_file, comment, ap); | |
580 | } | |
581 | #else | |
582 | { | |
583 | HOST_WIDE_INT work = value; | |
584 | int more, byte; | |
58356836 | 585 | const char *byte_op = targetm.asm_out.byte_op; |
ca98eb0a | 586 | |
58356836 | 587 | if (byte_op) |
588 | fputs (byte_op, asm_out_file); | |
ca98eb0a | 589 | do |
590 | { | |
591 | byte = (work & 0x7f); | |
592 | /* arithmetic shift */ | |
593 | work >>= 7; | |
594 | more = !((work == 0 && (byte & 0x40) == 0) | |
595 | || (work == -1 && (byte & 0x40) != 0)); | |
596 | if (more) | |
597 | byte |= 0x80; | |
598 | ||
58356836 | 599 | if (byte_op) |
600 | { | |
601 | fprintf (asm_out_file, "0x%x", byte); | |
602 | if (more) | |
603 | fputc (',', asm_out_file); | |
604 | } | |
605 | else | |
606 | assemble_integer (GEN_INT (byte), 1, BITS_PER_UNIT, 1); | |
ca98eb0a | 607 | } |
608 | while (more); | |
609 | ||
610 | if (flag_debug_asm) | |
611 | { | |
85aa12f7 | 612 | fprintf (asm_out_file, "\t%s sleb128 " HOST_WIDE_INT_PRINT_DEC, |
613 | ASM_COMMENT_START, value); | |
ca98eb0a | 614 | if (comment) |
615 | { | |
616 | fputs ("; ", asm_out_file); | |
617 | vfprintf (asm_out_file, comment, ap); | |
618 | } | |
619 | } | |
620 | } | |
621 | #endif | |
622 | fputc ('\n', asm_out_file); | |
623 | ||
ee582a61 | 624 | va_end (ap); |
ca98eb0a | 625 | } |
626 | ||
627 | void | |
ee582a61 | 628 | dw2_asm_output_delta_uleb128 (const char *lab1 ATTRIBUTE_UNUSED, |
629 | const char *lab2 ATTRIBUTE_UNUSED, | |
630 | const char *comment, ...) | |
ca98eb0a | 631 | { |
ee582a61 | 632 | va_list ap; |
633 | ||
634 | va_start (ap, comment); | |
ca98eb0a | 635 | |
636 | #ifdef HAVE_AS_LEB128 | |
8de0b9f7 | 637 | fputs ("\t.uleb128 ", asm_out_file); |
ca98eb0a | 638 | assemble_name (asm_out_file, lab1); |
639 | fputc ('-', asm_out_file); | |
640 | assemble_name (asm_out_file, lab2); | |
641 | #else | |
7bd4f6b6 | 642 | gcc_unreachable (); |
ca98eb0a | 643 | #endif |
644 | ||
645 | if (flag_debug_asm && comment) | |
646 | { | |
647 | fprintf (asm_out_file, "\t%s ", ASM_COMMENT_START); | |
648 | vfprintf (asm_out_file, comment, ap); | |
649 | } | |
650 | fputc ('\n', asm_out_file); | |
651 | ||
ee582a61 | 652 | va_end (ap); |
ca98eb0a | 653 | } |
654 | ||
31ac8297 | 655 | #if 0 |
656 | ||
ca98eb0a | 657 | void |
ee582a61 | 658 | dw2_asm_output_delta_sleb128 (const char *lab1 ATTRIBUTE_UNUSED, |
659 | const char *lab2 ATTRIBUTE_UNUSED, | |
660 | const char *comment, ...) | |
ca98eb0a | 661 | { |
ee582a61 | 662 | va_list ap; |
8ec3a57b | 663 | |
ee582a61 | 664 | va_start (ap, comment); |
ca98eb0a | 665 | |
666 | #ifdef HAVE_AS_LEB128 | |
8de0b9f7 | 667 | fputs ("\t.sleb128 ", asm_out_file); |
ca98eb0a | 668 | assemble_name (asm_out_file, lab1); |
669 | fputc ('-', asm_out_file); | |
670 | assemble_name (asm_out_file, lab2); | |
671 | #else | |
7bd4f6b6 | 672 | gcc_unreachable (); |
ca98eb0a | 673 | #endif |
674 | ||
675 | if (flag_debug_asm && comment) | |
676 | { | |
677 | fprintf (asm_out_file, "\t%s ", ASM_COMMENT_START); | |
678 | vfprintf (asm_out_file, comment, ap); | |
679 | } | |
680 | fputc ('\n', asm_out_file); | |
681 | ||
ee582a61 | 682 | va_end (ap); |
ca98eb0a | 683 | } |
31ac8297 | 684 | #endif /* 0 */ |
ad5818ae | 685 | \f |
8ec3a57b | 686 | static rtx dw2_force_const_mem (rtx); |
687 | static int dw2_output_indirect_constant_1 (splay_tree_node, void *); | |
ad5818ae | 688 | |
573aba85 | 689 | static GTY((param1_is (char *), param2_is (tree))) splay_tree indirect_pool; |
690 | ||
691 | static GTY(()) int dw2_const_labelno; | |
ad5818ae | 692 | |
403cf343 | 693 | #if defined(HAVE_GAS_HIDDEN) && defined(SUPPORTS_ONE_ONLY) |
694 | # define USE_LINKONCE_INDIRECT 1 | |
695 | #else | |
696 | # define USE_LINKONCE_INDIRECT 0 | |
697 | #endif | |
698 | ||
9b84bf7d | 699 | /* Put X, a SYMBOL_REF, in memory. Return a SYMBOL_REF to the allocated |
700 | memory. Differs from force_const_mem in that a single pool is used for | |
701 | the entire unit of translation, and the memory is not guaranteed to be | |
702 | "near" the function in any interesting sense. */ | |
703 | ||
ad5818ae | 704 | static rtx |
8ec3a57b | 705 | dw2_force_const_mem (rtx x) |
ad5818ae | 706 | { |
707 | splay_tree_node node; | |
dc4303d7 | 708 | const char *str; |
403cf343 | 709 | tree decl; |
ad5818ae | 710 | |
711 | if (! indirect_pool) | |
573aba85 | 712 | indirect_pool = splay_tree_new_ggc (splay_tree_compare_pointers); |
ad5818ae | 713 | |
7bd4f6b6 | 714 | gcc_assert (GET_CODE (x) == SYMBOL_REF); |
dc4303d7 | 715 | |
6fb33aa0 | 716 | str = targetm.strip_name_encoding (XSTR (x, 0)); |
dc4303d7 | 717 | node = splay_tree_lookup (indirect_pool, (splay_tree_key) str); |
ad5818ae | 718 | if (node) |
403cf343 | 719 | decl = (tree) node->value; |
ad5818ae | 720 | else |
721 | { | |
ad5818ae | 722 | tree id; |
723 | ||
403cf343 | 724 | if (USE_LINKONCE_INDIRECT) |
725 | { | |
dc4303d7 | 726 | char *ref_name = alloca (strlen (str) + sizeof "DW.ref."); |
403cf343 | 727 | |
dc4303d7 | 728 | sprintf (ref_name, "DW.ref.%s", str); |
403cf343 | 729 | id = get_identifier (ref_name); |
730 | decl = build_decl (VAR_DECL, id, ptr_type_node); | |
731 | DECL_ARTIFICIAL (decl) = 1; | |
553acd9c | 732 | DECL_IGNORED_P (decl) = 1; |
c21e07dc | 733 | TREE_PUBLIC (decl) = 1; |
403cf343 | 734 | DECL_INITIAL (decl) = decl; |
735 | make_decl_one_only (decl); | |
736 | } | |
737 | else | |
738 | { | |
403cf343 | 739 | char label[32]; |
740 | ||
573aba85 | 741 | ASM_GENERATE_INTERNAL_LABEL (label, "LDFCM", dw2_const_labelno); |
742 | ++dw2_const_labelno; | |
403cf343 | 743 | id = get_identifier (label); |
744 | decl = build_decl (VAR_DECL, id, ptr_type_node); | |
745 | DECL_ARTIFICIAL (decl) = 1; | |
553acd9c | 746 | DECL_IGNORED_P (decl) = 1; |
c21e07dc | 747 | TREE_STATIC (decl) = 1; |
403cf343 | 748 | DECL_INITIAL (decl) = decl; |
749 | } | |
ad5818ae | 750 | |
dc4303d7 | 751 | id = maybe_get_identifier (str); |
ad5818ae | 752 | if (id) |
753 | TREE_SYMBOL_REFERENCED (id) = 1; | |
754 | ||
dc4303d7 | 755 | splay_tree_insert (indirect_pool, (splay_tree_key) str, |
403cf343 | 756 | (splay_tree_value) decl); |
ad5818ae | 757 | } |
758 | ||
403cf343 | 759 | return XEXP (DECL_RTL (decl), 0); |
ad5818ae | 760 | } |
761 | ||
9b84bf7d | 762 | /* A helper function for dw2_output_indirect_constants called through |
763 | splay_tree_foreach. Emit one queued constant to memory. */ | |
764 | ||
ad5818ae | 765 | static int |
8ec3a57b | 766 | dw2_output_indirect_constant_1 (splay_tree_node node, |
767 | void *data ATTRIBUTE_UNUSED) | |
ad5818ae | 768 | { |
403cf343 | 769 | const char *sym; |
ad5818ae | 770 | rtx sym_ref; |
771 | ||
ad5818ae | 772 | sym = (const char *) node->key; |
773 | sym_ref = gen_rtx_SYMBOL_REF (Pmode, sym); | |
403cf343 | 774 | if (USE_LINKONCE_INDIRECT) |
eec4f60c | 775 | fprintf (asm_out_file, "\t.hidden %sDW.ref.%s\n", user_label_prefix, sym); |
403cf343 | 776 | assemble_variable ((tree) node->value, 1, 1, 1); |
d24cc82a | 777 | assemble_integer (sym_ref, POINTER_SIZE / BITS_PER_UNIT, POINTER_SIZE, 1); |
ad5818ae | 778 | |
779 | return 0; | |
780 | } | |
781 | ||
9b84bf7d | 782 | /* Emit the constants queued through dw2_force_const_mem. */ |
783 | ||
ad5818ae | 784 | void |
8ec3a57b | 785 | dw2_output_indirect_constants (void) |
ad5818ae | 786 | { |
403cf343 | 787 | if (indirect_pool) |
788 | splay_tree_foreach (indirect_pool, dw2_output_indirect_constant_1, NULL); | |
ad5818ae | 789 | } |
790 | ||
9b84bf7d | 791 | /* Like dw2_asm_output_addr_rtx, but encode the pointer as directed. */ |
792 | ||
ad5818ae | 793 | void |
ee582a61 | 794 | dw2_asm_output_encoded_addr_rtx (int encoding, rtx addr, |
795 | const char *comment, ...) | |
ad5818ae | 796 | { |
797 | int size; | |
ee582a61 | 798 | va_list ap; |
8ec3a57b | 799 | |
ee582a61 | 800 | va_start (ap, comment); |
9b84bf7d | 801 | |
802 | size = size_of_encoded_value (encoding); | |
ad5818ae | 803 | |
9a4d22ba | 804 | if (encoding == DW_EH_PE_aligned) |
805 | { | |
806 | assemble_align (POINTER_SIZE); | |
104eedee | 807 | assemble_integer (addr, size, POINTER_SIZE, 1); |
808 | return; | |
9a4d22ba | 809 | } |
810 | ||
1c6585ca | 811 | /* NULL is _always_ represented as a plain zero, as is 1 for Ada's |
812 | "all others". */ | |
813 | if (addr == const0_rtx || addr == const1_rtx) | |
09d688ff | 814 | assemble_integer (addr, size, BITS_PER_UNIT, 1); |
9b84bf7d | 815 | else |
ad5818ae | 816 | { |
9b84bf7d | 817 | restart: |
818 | /* Allow the target first crack at emitting this. Some of the | |
1eefe280 | 819 | special relocations require special directives instead of |
9b84bf7d | 820 | just ".4byte" or whatever. */ |
ad5818ae | 821 | #ifdef ASM_MAYBE_OUTPUT_ENCODED_ADDR_RTX |
9b84bf7d | 822 | ASM_MAYBE_OUTPUT_ENCODED_ADDR_RTX (asm_out_file, encoding, size, |
823 | addr, done); | |
ad5818ae | 824 | #endif |
825 | ||
9b84bf7d | 826 | /* Indirection is used to get dynamic relocations out of a |
827 | read-only section. */ | |
828 | if (encoding & DW_EH_PE_indirect) | |
829 | { | |
830 | /* It is very tempting to use force_const_mem so that we share data | |
831 | with the normal constant pool. However, we've already emitted | |
832 | the constant pool for this function. Moreover, we'd like to | |
833 | share these constants across the entire unit of translation, | |
834 | or better, across the entire application (or DSO). */ | |
835 | addr = dw2_force_const_mem (addr); | |
836 | encoding &= ~DW_EH_PE_indirect; | |
837 | goto restart; | |
838 | } | |
ad5818ae | 839 | |
9b84bf7d | 840 | switch (encoding & 0xF0) |
841 | { | |
842 | case DW_EH_PE_absptr: | |
58356836 | 843 | dw2_assemble_integer (size, addr); |
9b84bf7d | 844 | break; |
ad5818ae | 845 | |
9b84bf7d | 846 | case DW_EH_PE_pcrel: |
7bd4f6b6 | 847 | gcc_assert (GET_CODE (addr) == SYMBOL_REF); |
ad5818ae | 848 | #ifdef ASM_OUTPUT_DWARF_PCREL |
9b84bf7d | 849 | ASM_OUTPUT_DWARF_PCREL (asm_out_file, size, XSTR (addr, 0)); |
ad5818ae | 850 | #else |
58356836 | 851 | dw2_assemble_integer (size, gen_rtx_MINUS (Pmode, addr, pc_rtx)); |
ad5818ae | 852 | #endif |
9b84bf7d | 853 | break; |
ad5818ae | 854 | |
9b84bf7d | 855 | default: |
1eefe280 | 856 | /* Other encodings should have been handled by |
9b84bf7d | 857 | ASM_MAYBE_OUTPUT_ENCODED_ADDR_RTX. */ |
7bd4f6b6 | 858 | gcc_unreachable (); |
9b84bf7d | 859 | } |
ad5818ae | 860 | |
861 | #ifdef ASM_MAYBE_OUTPUT_ENCODED_ADDR_RTX | |
9b84bf7d | 862 | done:; |
ad5818ae | 863 | #endif |
9b84bf7d | 864 | } |
865 | ||
866 | if (flag_debug_asm && comment) | |
867 | { | |
868 | fprintf (asm_out_file, "\t%s ", ASM_COMMENT_START); | |
869 | vfprintf (asm_out_file, comment, ap); | |
870 | } | |
ad5818ae | 871 | fputc ('\n', asm_out_file); |
9b84bf7d | 872 | |
ee582a61 | 873 | va_end (ap); |
ad5818ae | 874 | } |
573aba85 | 875 | |
876 | #include "gt-dwarf2asm.h" |