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bb2ec1b3 TT |
1 | /* Convert a DWARF location expression to C |
2 | ||
42a4f53d | 3 | Copyright (C) 2014-2019 Free Software Foundation, Inc. |
bb2ec1b3 TT |
4 | |
5 | This file is part of GDB. | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 3 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | This program 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 this program. If not, see <http://www.gnu.org/licenses/>. */ | |
19 | ||
20 | #include "defs.h" | |
21 | #include "dwarf2.h" | |
22 | #include "dwarf2expr.h" | |
23 | #include "dwarf2loc.h" | |
24 | #include "ui-file.h" | |
25 | #include "utils.h" | |
26 | #include "compile-internal.h" | |
b7dc48b4 | 27 | #include "compile-c.h" |
bb2ec1b3 TT |
28 | #include "compile.h" |
29 | #include "block.h" | |
30 | #include "dwarf2-frame.h" | |
268a13a5 | 31 | #include "gdbsupport/gdb_vecs.h" |
bb2ec1b3 TT |
32 | #include "value.h" |
33 | ||
34 | \f | |
35 | ||
36 | /* Information about a given instruction. */ | |
37 | ||
38 | struct insn_info | |
39 | { | |
40 | /* Stack depth at entry. */ | |
41 | ||
42 | unsigned int depth; | |
43 | ||
44 | /* Whether this instruction has been visited. */ | |
45 | ||
46 | unsigned int visited : 1; | |
47 | ||
48 | /* Whether this instruction needs a label. */ | |
49 | ||
50 | unsigned int label : 1; | |
51 | ||
4aa4e28b TT |
52 | /* Whether this instruction is DW_OP_GNU_push_tls_address or |
53 | DW_OP_form_tls_address. This is a hack until we can add a | |
54 | feature to glibc to let us properly generate code for TLS. */ | |
bb2ec1b3 TT |
55 | |
56 | unsigned int is_tls : 1; | |
57 | }; | |
58 | ||
59 | /* A helper function for compute_stack_depth that does the work. This | |
60 | examines the DWARF expression starting from START and computes | |
61 | stack effects. | |
62 | ||
63 | NEED_TEMPVAR is an out parameter which is set if this expression | |
64 | needs a special temporary variable to be emitted (see the code | |
65 | generator). | |
c6bcad5f | 66 | INFO is a vector of insn_info objects, indexed by offset from the |
bb2ec1b3 TT |
67 | start of the DWARF expression. |
68 | TO_DO is a list of bytecodes which must be examined; it may be | |
69 | added to by this function. | |
70 | BYTE_ORDER and ADDR_SIZE describe this bytecode in the obvious way. | |
71 | OP_PTR and OP_END are the bounds of the DWARF expression. */ | |
72 | ||
73 | static void | |
74 | compute_stack_depth_worker (int start, int *need_tempvar, | |
c6bcad5f | 75 | std::vector<struct insn_info> *info, |
711799d5 | 76 | std::vector<int> *to_do, |
bb2ec1b3 TT |
77 | enum bfd_endian byte_order, unsigned int addr_size, |
78 | const gdb_byte *op_ptr, const gdb_byte *op_end) | |
79 | { | |
80 | const gdb_byte * const base = op_ptr; | |
81 | int stack_depth; | |
82 | ||
83 | op_ptr += start; | |
c6bcad5f TT |
84 | gdb_assert ((*info)[start].visited); |
85 | stack_depth = (*info)[start].depth; | |
bb2ec1b3 TT |
86 | |
87 | while (op_ptr < op_end) | |
88 | { | |
aead7601 | 89 | enum dwarf_location_atom op = (enum dwarf_location_atom) *op_ptr; |
bb2ec1b3 TT |
90 | uint64_t reg; |
91 | int64_t offset; | |
92 | int ndx = op_ptr - base; | |
93 | ||
94 | #define SET_CHECK_DEPTH(WHERE) \ | |
c6bcad5f | 95 | if ((*info)[WHERE].visited) \ |
bb2ec1b3 | 96 | { \ |
c6bcad5f | 97 | if ((*info)[WHERE].depth != stack_depth) \ |
bb2ec1b3 TT |
98 | error (_("inconsistent stack depths")); \ |
99 | } \ | |
100 | else \ | |
101 | { \ | |
102 | /* Stack depth not set, so set it. */ \ | |
c6bcad5f TT |
103 | (*info)[WHERE].visited = 1; \ |
104 | (*info)[WHERE].depth = stack_depth; \ | |
bb2ec1b3 TT |
105 | } |
106 | ||
107 | SET_CHECK_DEPTH (ndx); | |
108 | ||
109 | ++op_ptr; | |
110 | ||
111 | switch (op) | |
112 | { | |
113 | case DW_OP_lit0: | |
114 | case DW_OP_lit1: | |
115 | case DW_OP_lit2: | |
116 | case DW_OP_lit3: | |
117 | case DW_OP_lit4: | |
118 | case DW_OP_lit5: | |
119 | case DW_OP_lit6: | |
120 | case DW_OP_lit7: | |
121 | case DW_OP_lit8: | |
122 | case DW_OP_lit9: | |
123 | case DW_OP_lit10: | |
124 | case DW_OP_lit11: | |
125 | case DW_OP_lit12: | |
126 | case DW_OP_lit13: | |
127 | case DW_OP_lit14: | |
128 | case DW_OP_lit15: | |
129 | case DW_OP_lit16: | |
130 | case DW_OP_lit17: | |
131 | case DW_OP_lit18: | |
132 | case DW_OP_lit19: | |
133 | case DW_OP_lit20: | |
134 | case DW_OP_lit21: | |
135 | case DW_OP_lit22: | |
136 | case DW_OP_lit23: | |
137 | case DW_OP_lit24: | |
138 | case DW_OP_lit25: | |
139 | case DW_OP_lit26: | |
140 | case DW_OP_lit27: | |
141 | case DW_OP_lit28: | |
142 | case DW_OP_lit29: | |
143 | case DW_OP_lit30: | |
144 | case DW_OP_lit31: | |
145 | ++stack_depth; | |
146 | break; | |
147 | ||
148 | case DW_OP_addr: | |
149 | op_ptr += addr_size; | |
150 | ++stack_depth; | |
151 | break; | |
152 | ||
153 | case DW_OP_const1u: | |
154 | case DW_OP_const1s: | |
155 | op_ptr += 1; | |
156 | ++stack_depth; | |
157 | break; | |
158 | case DW_OP_const2u: | |
159 | case DW_OP_const2s: | |
160 | op_ptr += 2; | |
161 | ++stack_depth; | |
162 | break; | |
163 | case DW_OP_const4u: | |
164 | case DW_OP_const4s: | |
165 | op_ptr += 4; | |
166 | ++stack_depth; | |
167 | break; | |
168 | case DW_OP_const8u: | |
169 | case DW_OP_const8s: | |
170 | op_ptr += 8; | |
171 | ++stack_depth; | |
172 | break; | |
173 | case DW_OP_constu: | |
174 | case DW_OP_consts: | |
175 | op_ptr = safe_read_sleb128 (op_ptr, op_end, &offset); | |
176 | ++stack_depth; | |
177 | break; | |
178 | ||
179 | case DW_OP_reg0: | |
180 | case DW_OP_reg1: | |
181 | case DW_OP_reg2: | |
182 | case DW_OP_reg3: | |
183 | case DW_OP_reg4: | |
184 | case DW_OP_reg5: | |
185 | case DW_OP_reg6: | |
186 | case DW_OP_reg7: | |
187 | case DW_OP_reg8: | |
188 | case DW_OP_reg9: | |
189 | case DW_OP_reg10: | |
190 | case DW_OP_reg11: | |
191 | case DW_OP_reg12: | |
192 | case DW_OP_reg13: | |
193 | case DW_OP_reg14: | |
194 | case DW_OP_reg15: | |
195 | case DW_OP_reg16: | |
196 | case DW_OP_reg17: | |
197 | case DW_OP_reg18: | |
198 | case DW_OP_reg19: | |
199 | case DW_OP_reg20: | |
200 | case DW_OP_reg21: | |
201 | case DW_OP_reg22: | |
202 | case DW_OP_reg23: | |
203 | case DW_OP_reg24: | |
204 | case DW_OP_reg25: | |
205 | case DW_OP_reg26: | |
206 | case DW_OP_reg27: | |
207 | case DW_OP_reg28: | |
208 | case DW_OP_reg29: | |
209 | case DW_OP_reg30: | |
210 | case DW_OP_reg31: | |
211 | ++stack_depth; | |
212 | break; | |
213 | ||
214 | case DW_OP_regx: | |
215 | op_ptr = safe_read_uleb128 (op_ptr, op_end, ®); | |
216 | ++stack_depth; | |
217 | break; | |
218 | ||
219 | case DW_OP_breg0: | |
220 | case DW_OP_breg1: | |
221 | case DW_OP_breg2: | |
222 | case DW_OP_breg3: | |
223 | case DW_OP_breg4: | |
224 | case DW_OP_breg5: | |
225 | case DW_OP_breg6: | |
226 | case DW_OP_breg7: | |
227 | case DW_OP_breg8: | |
228 | case DW_OP_breg9: | |
229 | case DW_OP_breg10: | |
230 | case DW_OP_breg11: | |
231 | case DW_OP_breg12: | |
232 | case DW_OP_breg13: | |
233 | case DW_OP_breg14: | |
234 | case DW_OP_breg15: | |
235 | case DW_OP_breg16: | |
236 | case DW_OP_breg17: | |
237 | case DW_OP_breg18: | |
238 | case DW_OP_breg19: | |
239 | case DW_OP_breg20: | |
240 | case DW_OP_breg21: | |
241 | case DW_OP_breg22: | |
242 | case DW_OP_breg23: | |
243 | case DW_OP_breg24: | |
244 | case DW_OP_breg25: | |
245 | case DW_OP_breg26: | |
246 | case DW_OP_breg27: | |
247 | case DW_OP_breg28: | |
248 | case DW_OP_breg29: | |
249 | case DW_OP_breg30: | |
250 | case DW_OP_breg31: | |
251 | op_ptr = safe_read_sleb128 (op_ptr, op_end, &offset); | |
252 | ++stack_depth; | |
253 | break; | |
254 | case DW_OP_bregx: | |
255 | { | |
256 | op_ptr = safe_read_uleb128 (op_ptr, op_end, ®); | |
257 | op_ptr = safe_read_sleb128 (op_ptr, op_end, &offset); | |
258 | ++stack_depth; | |
259 | } | |
260 | break; | |
261 | case DW_OP_fbreg: | |
262 | op_ptr = safe_read_sleb128 (op_ptr, op_end, &offset); | |
263 | ++stack_depth; | |
264 | break; | |
265 | ||
266 | case DW_OP_dup: | |
267 | ++stack_depth; | |
268 | break; | |
269 | ||
270 | case DW_OP_drop: | |
271 | --stack_depth; | |
272 | break; | |
273 | ||
274 | case DW_OP_pick: | |
275 | ++op_ptr; | |
276 | ++stack_depth; | |
277 | break; | |
278 | ||
279 | case DW_OP_rot: | |
280 | case DW_OP_swap: | |
281 | *need_tempvar = 1; | |
282 | break; | |
283 | ||
284 | case DW_OP_over: | |
285 | ++stack_depth; | |
286 | break; | |
287 | ||
288 | case DW_OP_abs: | |
289 | case DW_OP_neg: | |
290 | case DW_OP_not: | |
291 | case DW_OP_deref: | |
292 | break; | |
293 | ||
294 | case DW_OP_deref_size: | |
295 | ++op_ptr; | |
296 | break; | |
297 | ||
298 | case DW_OP_plus_uconst: | |
299 | op_ptr = safe_read_uleb128 (op_ptr, op_end, ®); | |
300 | break; | |
301 | ||
302 | case DW_OP_div: | |
303 | case DW_OP_shra: | |
304 | case DW_OP_and: | |
305 | case DW_OP_minus: | |
306 | case DW_OP_mod: | |
307 | case DW_OP_mul: | |
308 | case DW_OP_or: | |
309 | case DW_OP_plus: | |
310 | case DW_OP_shl: | |
311 | case DW_OP_shr: | |
312 | case DW_OP_xor: | |
313 | case DW_OP_le: | |
314 | case DW_OP_ge: | |
315 | case DW_OP_eq: | |
316 | case DW_OP_lt: | |
317 | case DW_OP_gt: | |
318 | case DW_OP_ne: | |
319 | --stack_depth; | |
320 | break; | |
321 | ||
322 | case DW_OP_call_frame_cfa: | |
323 | ++stack_depth; | |
324 | break; | |
325 | ||
326 | case DW_OP_GNU_push_tls_address: | |
4aa4e28b | 327 | case DW_OP_form_tls_address: |
c6bcad5f | 328 | (*info)[ndx].is_tls = 1; |
bb2ec1b3 TT |
329 | break; |
330 | ||
331 | case DW_OP_skip: | |
332 | offset = extract_signed_integer (op_ptr, 2, byte_order); | |
333 | op_ptr += 2; | |
334 | offset = op_ptr + offset - base; | |
335 | /* If the destination has not been seen yet, add it to the | |
336 | to-do list. */ | |
c6bcad5f | 337 | if (!(*info)[offset].visited) |
711799d5 | 338 | to_do->push_back (offset); |
bb2ec1b3 | 339 | SET_CHECK_DEPTH (offset); |
c6bcad5f | 340 | (*info)[offset].label = 1; |
bb2ec1b3 TT |
341 | /* We're done with this line of code. */ |
342 | return; | |
343 | ||
344 | case DW_OP_bra: | |
345 | offset = extract_signed_integer (op_ptr, 2, byte_order); | |
346 | op_ptr += 2; | |
347 | offset = op_ptr + offset - base; | |
348 | --stack_depth; | |
349 | /* If the destination has not been seen yet, add it to the | |
350 | to-do list. */ | |
c6bcad5f | 351 | if (!(*info)[offset].visited) |
711799d5 | 352 | to_do->push_back (offset); |
bb2ec1b3 | 353 | SET_CHECK_DEPTH (offset); |
c6bcad5f | 354 | (*info)[offset].label = 1; |
bb2ec1b3 TT |
355 | break; |
356 | ||
357 | case DW_OP_nop: | |
358 | break; | |
359 | ||
360 | default: | |
361 | error (_("unhandled DWARF op: %s"), get_DW_OP_name (op)); | |
362 | } | |
363 | } | |
364 | ||
365 | gdb_assert (op_ptr == op_end); | |
366 | ||
367 | #undef SET_CHECK_DEPTH | |
368 | } | |
369 | ||
370 | /* Compute the maximum needed stack depth of a DWARF expression, and | |
371 | some other information as well. | |
372 | ||
373 | BYTE_ORDER and ADDR_SIZE describe this bytecode in the obvious way. | |
374 | NEED_TEMPVAR is an out parameter which is set if this expression | |
375 | needs a special temporary variable to be emitted (see the code | |
376 | generator). | |
377 | IS_TLS is an out parameter which is set if this expression refers | |
378 | to a TLS variable. | |
379 | OP_PTR and OP_END are the bounds of the DWARF expression. | |
380 | INITIAL_DEPTH is the initial depth of the DWARF expression stack. | |
381 | INFO is an array of insn_info objects, indexed by offset from the | |
382 | start of the DWARF expression. | |
383 | ||
384 | This returns the maximum stack depth. */ | |
385 | ||
386 | static int | |
387 | compute_stack_depth (enum bfd_endian byte_order, unsigned int addr_size, | |
388 | int *need_tempvar, int *is_tls, | |
389 | const gdb_byte *op_ptr, const gdb_byte *op_end, | |
390 | int initial_depth, | |
c6bcad5f | 391 | std::vector<struct insn_info> *info) |
bb2ec1b3 | 392 | { |
711799d5 | 393 | std::vector<int> to_do; |
bb2ec1b3 TT |
394 | int stack_depth, i; |
395 | ||
c6bcad5f | 396 | info->resize (op_end - op_ptr); |
bb2ec1b3 | 397 | |
711799d5 | 398 | to_do.push_back (0); |
bb2ec1b3 TT |
399 | (*info)[0].depth = initial_depth; |
400 | (*info)[0].visited = 1; | |
401 | ||
711799d5 | 402 | while (!to_do.empty ()) |
bb2ec1b3 | 403 | { |
711799d5 TT |
404 | int ndx = to_do.back (); |
405 | to_do.pop_back (); | |
bb2ec1b3 | 406 | |
c6bcad5f | 407 | compute_stack_depth_worker (ndx, need_tempvar, info, &to_do, |
bb2ec1b3 TT |
408 | byte_order, addr_size, |
409 | op_ptr, op_end); | |
410 | } | |
411 | ||
412 | stack_depth = 0; | |
413 | *is_tls = 0; | |
414 | for (i = 0; i < op_end - op_ptr; ++i) | |
415 | { | |
416 | if ((*info)[i].depth > stack_depth) | |
417 | stack_depth = (*info)[i].depth; | |
418 | if ((*info)[i].is_tls) | |
419 | *is_tls = 1; | |
420 | } | |
421 | ||
bb2ec1b3 TT |
422 | return stack_depth + 1; |
423 | } | |
424 | ||
425 | \f | |
426 | ||
427 | #define GCC_UINTPTR "__gdb_uintptr" | |
428 | #define GCC_INTPTR "__gdb_intptr" | |
429 | ||
430 | /* Emit code to push a constant. */ | |
431 | ||
432 | static void | |
d82b3862 | 433 | push (int indent, string_file *stream, ULONGEST l) |
bb2ec1b3 | 434 | { |
d82b3862 | 435 | fprintfi_filtered (indent, stream, |
3a9558c4 | 436 | "__gdb_stack[++__gdb_tos] = (" GCC_UINTPTR ") %s;\n", |
bb2ec1b3 TT |
437 | hex_string (l)); |
438 | } | |
439 | ||
440 | /* Emit code to push an arbitrary expression. This works like | |
441 | printf. */ | |
442 | ||
d82b3862 | 443 | static void pushf (int indent, string_file *stream, const char *format, ...) |
77b64a49 PA |
444 | ATTRIBUTE_PRINTF (3, 4); |
445 | ||
bb2ec1b3 | 446 | static void |
d82b3862 | 447 | pushf (int indent, string_file *stream, const char *format, ...) |
bb2ec1b3 TT |
448 | { |
449 | va_list args; | |
450 | ||
d82b3862 | 451 | fprintfi_filtered (indent, stream, "__gdb_stack[__gdb_tos + 1] = "); |
bb2ec1b3 | 452 | va_start (args, format); |
d82b3862 | 453 | stream->vprintf (format, args); |
bb2ec1b3 | 454 | va_end (args); |
d82b3862 | 455 | stream->puts (";\n"); |
bb2ec1b3 | 456 | |
d82b3862 | 457 | fprintfi_filtered (indent, stream, "++__gdb_tos;\n"); |
bb2ec1b3 TT |
458 | } |
459 | ||
460 | /* Emit code for a unary expression -- one which operates in-place on | |
461 | the top-of-stack. This works like printf. */ | |
462 | ||
d82b3862 | 463 | static void unary (int indent, string_file *stream, const char *format, ...) |
77b64a49 PA |
464 | ATTRIBUTE_PRINTF (3, 4); |
465 | ||
bb2ec1b3 | 466 | static void |
d82b3862 | 467 | unary (int indent, string_file *stream, const char *format, ...) |
bb2ec1b3 TT |
468 | { |
469 | va_list args; | |
470 | ||
d82b3862 | 471 | fprintfi_filtered (indent, stream, "__gdb_stack[__gdb_tos] = "); |
bb2ec1b3 | 472 | va_start (args, format); |
d82b3862 | 473 | stream->vprintf (format, args); |
bb2ec1b3 | 474 | va_end (args); |
d82b3862 | 475 | stream->puts (";\n"); |
bb2ec1b3 TT |
476 | } |
477 | ||
478 | /* Emit code for a unary expression -- one which uses the top two | |
479 | stack items, popping the topmost one. This works like printf. */ | |
d82b3862 | 480 | static void binary (int indent, string_file *stream, const char *format, ...) |
77b64a49 | 481 | ATTRIBUTE_PRINTF (3, 4); |
bb2ec1b3 TT |
482 | |
483 | static void | |
d82b3862 | 484 | binary (int indent, string_file *stream, const char *format, ...) |
bb2ec1b3 TT |
485 | { |
486 | va_list args; | |
487 | ||
d82b3862 | 488 | fprintfi_filtered (indent, stream, "__gdb_stack[__gdb_tos - 1] = "); |
bb2ec1b3 | 489 | va_start (args, format); |
d82b3862 | 490 | stream->vprintf (format, args); |
bb2ec1b3 | 491 | va_end (args); |
d82b3862 SM |
492 | stream->puts (";\n"); |
493 | fprintfi_filtered (indent, stream, "--__gdb_tos;\n"); | |
bb2ec1b3 TT |
494 | } |
495 | ||
496 | /* Print the name of a label given its "SCOPE", an arbitrary integer | |
497 | used for uniqueness, and its TARGET, the bytecode offset | |
498 | corresponding to the label's point of definition. */ | |
499 | ||
500 | static void | |
d82b3862 | 501 | print_label (string_file *stream, unsigned int scope, int target) |
bb2ec1b3 | 502 | { |
d82b3862 | 503 | stream->printf ("__label_%u_%s", scope, pulongest (target)); |
bb2ec1b3 TT |
504 | } |
505 | ||
506 | /* Emit code that pushes a register's address on the stack. | |
507 | REGISTERS_USED is an out parameter which is updated to note which | |
508 | register was needed by this expression. */ | |
509 | ||
510 | static void | |
d82b3862 | 511 | pushf_register_address (int indent, string_file *stream, |
bb2ec1b3 TT |
512 | unsigned char *registers_used, |
513 | struct gdbarch *gdbarch, int regnum) | |
514 | { | |
8f84fb0e | 515 | std::string regname = compile_register_name_mangled (gdbarch, regnum); |
bb2ec1b3 TT |
516 | |
517 | registers_used[regnum] = 1; | |
3a9558c4 JK |
518 | pushf (indent, stream, |
519 | "(" GCC_UINTPTR ") &" COMPILE_I_SIMPLE_REGISTER_ARG_NAME "->%s", | |
8f84fb0e | 520 | regname.c_str ()); |
bb2ec1b3 TT |
521 | } |
522 | ||
523 | /* Emit code that pushes a register's value on the stack. | |
524 | REGISTERS_USED is an out parameter which is updated to note which | |
525 | register was needed by this expression. OFFSET is added to the | |
526 | register's value before it is pushed. */ | |
527 | ||
528 | static void | |
d82b3862 | 529 | pushf_register (int indent, string_file *stream, |
bb2ec1b3 TT |
530 | unsigned char *registers_used, |
531 | struct gdbarch *gdbarch, int regnum, uint64_t offset) | |
532 | { | |
8f84fb0e | 533 | std::string regname = compile_register_name_mangled (gdbarch, regnum); |
bb2ec1b3 TT |
534 | |
535 | registers_used[regnum] = 1; | |
536 | if (offset == 0) | |
537 | pushf (indent, stream, COMPILE_I_SIMPLE_REGISTER_ARG_NAME "->%s", | |
8f84fb0e | 538 | regname.c_str ()); |
bb2ec1b3 | 539 | else |
3a9558c4 JK |
540 | pushf (indent, stream, |
541 | COMPILE_I_SIMPLE_REGISTER_ARG_NAME "->%s + (" GCC_UINTPTR ") %s", | |
8f84fb0e | 542 | regname.c_str (), hex_string (offset)); |
bb2ec1b3 TT |
543 | } |
544 | ||
545 | /* Compile a DWARF expression to C code. | |
546 | ||
547 | INDENT is the indentation level to use. | |
548 | STREAM is the stream where the code should be written. | |
549 | ||
550 | TYPE_NAME names the type of the result of the DWARF expression. | |
551 | For locations this is "void *" but for array bounds it will be an | |
552 | integer type. | |
553 | ||
554 | RESULT_NAME is the name of a variable in the resulting C code. The | |
555 | result of the expression will be assigned to this variable. | |
556 | ||
557 | SYM is the symbol corresponding to this expression. | |
558 | PC is the location at which the expression is being evaluated. | |
559 | ARCH is the architecture to use. | |
560 | ||
561 | REGISTERS_USED is an out parameter which is updated to note which | |
562 | registers were needed by this expression. | |
563 | ||
564 | ADDR_SIZE is the DWARF address size to use. | |
565 | ||
566 | OPT_PTR and OP_END are the bounds of the DWARF expression. | |
567 | ||
568 | If non-NULL, INITIAL points to an initial value to write to the | |
569 | stack. If NULL, no initial value is written. | |
570 | ||
571 | PER_CU is the per-CU object used for looking up various other | |
572 | things. */ | |
573 | ||
574 | static void | |
d82b3862 | 575 | do_compile_dwarf_expr_to_c (int indent, string_file *stream, |
bb2ec1b3 TT |
576 | const char *type_name, |
577 | const char *result_name, | |
578 | struct symbol *sym, CORE_ADDR pc, | |
579 | struct gdbarch *arch, | |
580 | unsigned char *registers_used, | |
581 | unsigned int addr_size, | |
582 | const gdb_byte *op_ptr, const gdb_byte *op_end, | |
583 | CORE_ADDR *initial, | |
584 | struct dwarf2_per_cu_data *per_cu) | |
585 | { | |
586 | /* We keep a counter so that labels and other objects we create have | |
587 | unique names. */ | |
588 | static unsigned int scope; | |
589 | ||
590 | enum bfd_endian byte_order = gdbarch_byte_order (arch); | |
591 | const gdb_byte * const base = op_ptr; | |
592 | int need_tempvar = 0; | |
593 | int is_tls = 0; | |
c6bcad5f | 594 | std::vector<struct insn_info> info; |
bb2ec1b3 TT |
595 | int stack_depth; |
596 | ||
597 | ++scope; | |
598 | ||
d82b3862 | 599 | fprintfi_filtered (indent, stream, "__attribute__ ((unused)) %s %s;\n", |
3a9558c4 | 600 | type_name, result_name); |
d82b3862 | 601 | fprintfi_filtered (indent, stream, "{\n"); |
bb2ec1b3 TT |
602 | indent += 2; |
603 | ||
604 | stack_depth = compute_stack_depth (byte_order, addr_size, | |
605 | &need_tempvar, &is_tls, | |
606 | op_ptr, op_end, initial != NULL, | |
607 | &info); | |
bb2ec1b3 TT |
608 | |
609 | /* This is a hack until we can add a feature to glibc to let us | |
610 | properly generate code for TLS. You might think we could emit | |
611 | the address in the ordinary course of translating | |
612 | DW_OP_GNU_push_tls_address, but since the operand appears on the | |
613 | stack, it is relatively hard to find, and the idea of calling | |
614 | target_translate_tls_address with OFFSET==0 and then adding the | |
615 | offset by hand seemed too hackish. */ | |
616 | if (is_tls) | |
617 | { | |
618 | struct frame_info *frame = get_selected_frame (NULL); | |
619 | struct value *val; | |
620 | ||
621 | if (frame == NULL) | |
622 | error (_("Symbol \"%s\" cannot be used because " | |
623 | "there is no selected frame"), | |
624 | SYMBOL_PRINT_NAME (sym)); | |
625 | ||
63e43d3a | 626 | val = read_var_value (sym, NULL, frame); |
bb2ec1b3 TT |
627 | if (VALUE_LVAL (val) != lval_memory) |
628 | error (_("Symbol \"%s\" cannot be used for compilation evaluation " | |
629 | "as its address has not been found."), | |
630 | SYMBOL_PRINT_NAME (sym)); | |
631 | ||
632 | warning (_("Symbol \"%s\" is thread-local and currently can only " | |
633 | "be referenced from the current thread in " | |
634 | "compiled code."), | |
635 | SYMBOL_PRINT_NAME (sym)); | |
636 | ||
d82b3862 | 637 | fprintfi_filtered (indent, stream, "%s = %s;\n", |
bb2ec1b3 TT |
638 | result_name, |
639 | core_addr_to_string (value_address (val))); | |
d82b3862 | 640 | fprintfi_filtered (indent - 2, stream, "}\n"); |
bb2ec1b3 TT |
641 | return; |
642 | } | |
643 | ||
d82b3862 | 644 | fprintfi_filtered (indent, stream, GCC_UINTPTR " __gdb_stack[%d];\n", |
bb2ec1b3 TT |
645 | stack_depth); |
646 | ||
647 | if (need_tempvar) | |
d82b3862 SM |
648 | fprintfi_filtered (indent, stream, GCC_UINTPTR " __gdb_tmp;\n"); |
649 | fprintfi_filtered (indent, stream, "int __gdb_tos = -1;\n"); | |
bb2ec1b3 TT |
650 | |
651 | if (initial != NULL) | |
77b64a49 | 652 | pushf (indent, stream, "%s", core_addr_to_string (*initial)); |
bb2ec1b3 TT |
653 | |
654 | while (op_ptr < op_end) | |
655 | { | |
aead7601 | 656 | enum dwarf_location_atom op = (enum dwarf_location_atom) *op_ptr; |
bb2ec1b3 TT |
657 | uint64_t uoffset, reg; |
658 | int64_t offset; | |
659 | ||
d82b3862 | 660 | print_spaces (indent - 2, stream); |
bb2ec1b3 TT |
661 | if (info[op_ptr - base].label) |
662 | { | |
663 | print_label (stream, scope, op_ptr - base); | |
d82b3862 | 664 | stream->puts (":;"); |
bb2ec1b3 | 665 | } |
d82b3862 | 666 | stream->printf ("/* %s */\n", get_DW_OP_name (op)); |
bb2ec1b3 TT |
667 | |
668 | /* This is handy for debugging the generated code: | |
669 | fprintf_filtered (stream, "if (__gdb_tos != %d) abort ();\n", | |
670 | (int) info[op_ptr - base].depth - 1); | |
671 | */ | |
672 | ||
673 | ++op_ptr; | |
674 | ||
675 | switch (op) | |
676 | { | |
677 | case DW_OP_lit0: | |
678 | case DW_OP_lit1: | |
679 | case DW_OP_lit2: | |
680 | case DW_OP_lit3: | |
681 | case DW_OP_lit4: | |
682 | case DW_OP_lit5: | |
683 | case DW_OP_lit6: | |
684 | case DW_OP_lit7: | |
685 | case DW_OP_lit8: | |
686 | case DW_OP_lit9: | |
687 | case DW_OP_lit10: | |
688 | case DW_OP_lit11: | |
689 | case DW_OP_lit12: | |
690 | case DW_OP_lit13: | |
691 | case DW_OP_lit14: | |
692 | case DW_OP_lit15: | |
693 | case DW_OP_lit16: | |
694 | case DW_OP_lit17: | |
695 | case DW_OP_lit18: | |
696 | case DW_OP_lit19: | |
697 | case DW_OP_lit20: | |
698 | case DW_OP_lit21: | |
699 | case DW_OP_lit22: | |
700 | case DW_OP_lit23: | |
701 | case DW_OP_lit24: | |
702 | case DW_OP_lit25: | |
703 | case DW_OP_lit26: | |
704 | case DW_OP_lit27: | |
705 | case DW_OP_lit28: | |
706 | case DW_OP_lit29: | |
707 | case DW_OP_lit30: | |
708 | case DW_OP_lit31: | |
709 | push (indent, stream, op - DW_OP_lit0); | |
710 | break; | |
711 | ||
712 | case DW_OP_addr: | |
266934d1 | 713 | uoffset = extract_unsigned_integer (op_ptr, addr_size, byte_order); |
bb2ec1b3 TT |
714 | op_ptr += addr_size; |
715 | /* Some versions of GCC emit DW_OP_addr before | |
716 | DW_OP_GNU_push_tls_address. In this case the value is an | |
717 | index, not an address. We don't support things like | |
718 | branching between the address and the TLS op. */ | |
719 | if (op_ptr >= op_end || *op_ptr != DW_OP_GNU_push_tls_address) | |
720 | uoffset += dwarf2_per_cu_text_offset (per_cu); | |
721 | push (indent, stream, uoffset); | |
722 | break; | |
723 | ||
724 | case DW_OP_const1u: | |
725 | push (indent, stream, | |
726 | extract_unsigned_integer (op_ptr, 1, byte_order)); | |
727 | op_ptr += 1; | |
728 | break; | |
729 | case DW_OP_const1s: | |
730 | push (indent, stream, | |
731 | extract_signed_integer (op_ptr, 1, byte_order)); | |
732 | op_ptr += 1; | |
733 | break; | |
734 | case DW_OP_const2u: | |
735 | push (indent, stream, | |
736 | extract_unsigned_integer (op_ptr, 2, byte_order)); | |
737 | op_ptr += 2; | |
738 | break; | |
739 | case DW_OP_const2s: | |
740 | push (indent, stream, | |
741 | extract_signed_integer (op_ptr, 2, byte_order)); | |
742 | op_ptr += 2; | |
743 | break; | |
744 | case DW_OP_const4u: | |
745 | push (indent, stream, | |
746 | extract_unsigned_integer (op_ptr, 4, byte_order)); | |
747 | op_ptr += 4; | |
748 | break; | |
749 | case DW_OP_const4s: | |
750 | push (indent, stream, | |
751 | extract_signed_integer (op_ptr, 4, byte_order)); | |
752 | op_ptr += 4; | |
753 | break; | |
754 | case DW_OP_const8u: | |
755 | push (indent, stream, | |
756 | extract_unsigned_integer (op_ptr, 8, byte_order)); | |
757 | op_ptr += 8; | |
758 | break; | |
759 | case DW_OP_const8s: | |
760 | push (indent, stream, | |
761 | extract_signed_integer (op_ptr, 8, byte_order)); | |
762 | op_ptr += 8; | |
763 | break; | |
764 | case DW_OP_constu: | |
765 | op_ptr = safe_read_uleb128 (op_ptr, op_end, &uoffset); | |
766 | push (indent, stream, uoffset); | |
767 | break; | |
768 | case DW_OP_consts: | |
769 | op_ptr = safe_read_sleb128 (op_ptr, op_end, &offset); | |
770 | push (indent, stream, offset); | |
771 | break; | |
772 | ||
773 | case DW_OP_reg0: | |
774 | case DW_OP_reg1: | |
775 | case DW_OP_reg2: | |
776 | case DW_OP_reg3: | |
777 | case DW_OP_reg4: | |
778 | case DW_OP_reg5: | |
779 | case DW_OP_reg6: | |
780 | case DW_OP_reg7: | |
781 | case DW_OP_reg8: | |
782 | case DW_OP_reg9: | |
783 | case DW_OP_reg10: | |
784 | case DW_OP_reg11: | |
785 | case DW_OP_reg12: | |
786 | case DW_OP_reg13: | |
787 | case DW_OP_reg14: | |
788 | case DW_OP_reg15: | |
789 | case DW_OP_reg16: | |
790 | case DW_OP_reg17: | |
791 | case DW_OP_reg18: | |
792 | case DW_OP_reg19: | |
793 | case DW_OP_reg20: | |
794 | case DW_OP_reg21: | |
795 | case DW_OP_reg22: | |
796 | case DW_OP_reg23: | |
797 | case DW_OP_reg24: | |
798 | case DW_OP_reg25: | |
799 | case DW_OP_reg26: | |
800 | case DW_OP_reg27: | |
801 | case DW_OP_reg28: | |
802 | case DW_OP_reg29: | |
803 | case DW_OP_reg30: | |
804 | case DW_OP_reg31: | |
805 | dwarf_expr_require_composition (op_ptr, op_end, "DW_OP_regx"); | |
806 | pushf_register_address (indent, stream, registers_used, arch, | |
0fde2c53 DE |
807 | dwarf_reg_to_regnum_or_error |
808 | (arch, op - DW_OP_reg0)); | |
bb2ec1b3 TT |
809 | break; |
810 | ||
811 | case DW_OP_regx: | |
812 | op_ptr = safe_read_uleb128 (op_ptr, op_end, ®); | |
813 | dwarf_expr_require_composition (op_ptr, op_end, "DW_OP_regx"); | |
814 | pushf_register_address (indent, stream, registers_used, arch, | |
0fde2c53 | 815 | dwarf_reg_to_regnum_or_error (arch, reg)); |
bb2ec1b3 TT |
816 | break; |
817 | ||
818 | case DW_OP_breg0: | |
819 | case DW_OP_breg1: | |
820 | case DW_OP_breg2: | |
821 | case DW_OP_breg3: | |
822 | case DW_OP_breg4: | |
823 | case DW_OP_breg5: | |
824 | case DW_OP_breg6: | |
825 | case DW_OP_breg7: | |
826 | case DW_OP_breg8: | |
827 | case DW_OP_breg9: | |
828 | case DW_OP_breg10: | |
829 | case DW_OP_breg11: | |
830 | case DW_OP_breg12: | |
831 | case DW_OP_breg13: | |
832 | case DW_OP_breg14: | |
833 | case DW_OP_breg15: | |
834 | case DW_OP_breg16: | |
835 | case DW_OP_breg17: | |
836 | case DW_OP_breg18: | |
837 | case DW_OP_breg19: | |
838 | case DW_OP_breg20: | |
839 | case DW_OP_breg21: | |
840 | case DW_OP_breg22: | |
841 | case DW_OP_breg23: | |
842 | case DW_OP_breg24: | |
843 | case DW_OP_breg25: | |
844 | case DW_OP_breg26: | |
845 | case DW_OP_breg27: | |
846 | case DW_OP_breg28: | |
847 | case DW_OP_breg29: | |
848 | case DW_OP_breg30: | |
849 | case DW_OP_breg31: | |
850 | op_ptr = safe_read_sleb128 (op_ptr, op_end, &offset); | |
851 | pushf_register (indent, stream, registers_used, arch, | |
0fde2c53 DE |
852 | dwarf_reg_to_regnum_or_error (arch, |
853 | op - DW_OP_breg0), | |
bb2ec1b3 TT |
854 | offset); |
855 | break; | |
856 | case DW_OP_bregx: | |
857 | { | |
858 | op_ptr = safe_read_uleb128 (op_ptr, op_end, ®); | |
859 | op_ptr = safe_read_sleb128 (op_ptr, op_end, &offset); | |
860 | pushf_register (indent, stream, registers_used, arch, | |
0fde2c53 | 861 | dwarf_reg_to_regnum_or_error (arch, reg), offset); |
bb2ec1b3 TT |
862 | } |
863 | break; | |
864 | case DW_OP_fbreg: | |
865 | { | |
866 | const gdb_byte *datastart; | |
867 | size_t datalen; | |
868 | const struct block *b; | |
869 | struct symbol *framefunc; | |
870 | char fb_name[50]; | |
871 | ||
872 | b = block_for_pc (pc); | |
873 | ||
874 | if (!b) | |
875 | error (_("No block found for address")); | |
876 | ||
877 | framefunc = block_linkage_function (b); | |
878 | ||
879 | if (!framefunc) | |
880 | error (_("No function found for block")); | |
881 | ||
882 | func_get_frame_base_dwarf_block (framefunc, pc, | |
883 | &datastart, &datalen); | |
884 | ||
885 | op_ptr = safe_read_sleb128 (op_ptr, op_end, &offset); | |
886 | ||
887 | /* Generate a unique-enough name, in case the frame base | |
888 | is computed multiple times in this expression. */ | |
889 | xsnprintf (fb_name, sizeof (fb_name), "__frame_base_%ld", | |
890 | (long) (op_ptr - base)); | |
891 | ||
892 | do_compile_dwarf_expr_to_c (indent, stream, | |
3a9558c4 | 893 | GCC_UINTPTR, fb_name, |
bb2ec1b3 TT |
894 | sym, pc, |
895 | arch, registers_used, addr_size, | |
896 | datastart, datastart + datalen, | |
897 | NULL, per_cu); | |
898 | ||
899 | pushf (indent, stream, "%s + %s", fb_name, hex_string (offset)); | |
900 | } | |
901 | break; | |
902 | ||
903 | case DW_OP_dup: | |
904 | pushf (indent, stream, "__gdb_stack[__gdb_tos]"); | |
905 | break; | |
906 | ||
907 | case DW_OP_drop: | |
d82b3862 | 908 | fprintfi_filtered (indent, stream, "--__gdb_tos;\n"); |
bb2ec1b3 TT |
909 | break; |
910 | ||
911 | case DW_OP_pick: | |
912 | offset = *op_ptr++; | |
77b64a49 PA |
913 | pushf (indent, stream, "__gdb_stack[__gdb_tos - %s]", |
914 | plongest (offset)); | |
bb2ec1b3 TT |
915 | break; |
916 | ||
917 | case DW_OP_swap: | |
d82b3862 | 918 | fprintfi_filtered (indent, stream, |
bb2ec1b3 | 919 | "__gdb_tmp = __gdb_stack[__gdb_tos - 1];\n"); |
d82b3862 | 920 | fprintfi_filtered (indent, stream, |
bb2ec1b3 TT |
921 | "__gdb_stack[__gdb_tos - 1] = " |
922 | "__gdb_stack[__gdb_tos];\n"); | |
d82b3862 SM |
923 | fprintfi_filtered (indent, stream, ("__gdb_stack[__gdb_tos] = " |
924 | "__gdb_tmp;\n")); | |
bb2ec1b3 TT |
925 | break; |
926 | ||
927 | case DW_OP_over: | |
928 | pushf (indent, stream, "__gdb_stack[__gdb_tos - 1]"); | |
929 | break; | |
930 | ||
931 | case DW_OP_rot: | |
d82b3862 SM |
932 | fprintfi_filtered (indent, stream, ("__gdb_tmp = " |
933 | "__gdb_stack[__gdb_tos];\n")); | |
934 | fprintfi_filtered (indent, stream, | |
bb2ec1b3 TT |
935 | "__gdb_stack[__gdb_tos] = " |
936 | "__gdb_stack[__gdb_tos - 1];\n"); | |
d82b3862 | 937 | fprintfi_filtered (indent, stream, |
bb2ec1b3 TT |
938 | "__gdb_stack[__gdb_tos - 1] = " |
939 | "__gdb_stack[__gdb_tos -2];\n"); | |
d82b3862 | 940 | fprintfi_filtered (indent, stream, "__gdb_stack[__gdb_tos - 2] = " |
bb2ec1b3 TT |
941 | "__gdb_tmp;\n"); |
942 | break; | |
943 | ||
944 | case DW_OP_deref: | |
945 | case DW_OP_deref_size: | |
946 | { | |
947 | int size; | |
948 | const char *mode; | |
949 | ||
950 | if (op == DW_OP_deref_size) | |
951 | size = *op_ptr++; | |
952 | else | |
953 | size = addr_size; | |
954 | ||
955 | mode = c_get_mode_for_size (size); | |
956 | if (mode == NULL) | |
957 | error (_("Unsupported size %d in %s"), | |
958 | size, get_DW_OP_name (op)); | |
959 | ||
960 | /* Cast to a pointer of the desired type, then | |
961 | dereference. */ | |
d82b3862 | 962 | fprintfi_filtered (indent, stream, |
bb2ec1b3 TT |
963 | "__gdb_stack[__gdb_tos] = " |
964 | "*((__gdb_int_%s *) " | |
965 | "__gdb_stack[__gdb_tos]);\n", | |
966 | mode); | |
967 | } | |
968 | break; | |
969 | ||
970 | case DW_OP_abs: | |
971 | unary (indent, stream, | |
972 | "((" GCC_INTPTR ") __gdb_stack[__gdb_tos]) < 0 ? " | |
973 | "-__gdb_stack[__gdb_tos] : __gdb_stack[__gdb_tos]"); | |
974 | break; | |
975 | ||
976 | case DW_OP_neg: | |
977 | unary (indent, stream, "-__gdb_stack[__gdb_tos]"); | |
978 | break; | |
979 | ||
980 | case DW_OP_not: | |
981 | unary (indent, stream, "~__gdb_stack[__gdb_tos]"); | |
982 | break; | |
983 | ||
984 | case DW_OP_plus_uconst: | |
985 | op_ptr = safe_read_uleb128 (op_ptr, op_end, ®); | |
986 | unary (indent, stream, "__gdb_stack[__gdb_tos] + %s", | |
987 | hex_string (reg)); | |
988 | break; | |
989 | ||
990 | case DW_OP_div: | |
991 | binary (indent, stream, ("((" GCC_INTPTR | |
992 | ") __gdb_stack[__gdb_tos-1]) / ((" | |
993 | GCC_INTPTR ") __gdb_stack[__gdb_tos])")); | |
994 | break; | |
995 | ||
996 | case DW_OP_shra: | |
997 | binary (indent, stream, | |
998 | "((" GCC_INTPTR ") __gdb_stack[__gdb_tos-1]) >> " | |
999 | "__gdb_stack[__gdb_tos]"); | |
1000 | break; | |
1001 | ||
1002 | #define BINARY(OP) \ | |
77b64a49 PA |
1003 | binary (indent, stream, "%s", "__gdb_stack[__gdb_tos-1] " #OP \ |
1004 | " __gdb_stack[__gdb_tos]"); \ | |
bb2ec1b3 TT |
1005 | break |
1006 | ||
1007 | case DW_OP_and: | |
1008 | BINARY (&); | |
1009 | case DW_OP_minus: | |
1010 | BINARY (-); | |
1011 | case DW_OP_mod: | |
1012 | BINARY (%); | |
1013 | case DW_OP_mul: | |
1014 | BINARY (*); | |
1015 | case DW_OP_or: | |
1016 | BINARY (|); | |
1017 | case DW_OP_plus: | |
1018 | BINARY (+); | |
1019 | case DW_OP_shl: | |
1020 | BINARY (<<); | |
1021 | case DW_OP_shr: | |
1022 | BINARY (>>); | |
1023 | case DW_OP_xor: | |
1024 | BINARY (^); | |
1025 | #undef BINARY | |
1026 | ||
1027 | #define COMPARE(OP) \ | |
1028 | binary (indent, stream, \ | |
1029 | "(((" GCC_INTPTR ") __gdb_stack[__gdb_tos-1]) " #OP \ | |
1030 | " ((" GCC_INTPTR \ | |
1031 | ") __gdb_stack[__gdb_tos]))"); \ | |
1032 | break | |
1033 | ||
1034 | case DW_OP_le: | |
1035 | COMPARE (<=); | |
1036 | case DW_OP_ge: | |
1037 | COMPARE (>=); | |
1038 | case DW_OP_eq: | |
1039 | COMPARE (==); | |
1040 | case DW_OP_lt: | |
1041 | COMPARE (<); | |
1042 | case DW_OP_gt: | |
1043 | COMPARE (>); | |
1044 | case DW_OP_ne: | |
1045 | COMPARE (!=); | |
1046 | #undef COMPARE | |
1047 | ||
1048 | case DW_OP_call_frame_cfa: | |
1049 | { | |
1050 | int regnum; | |
1051 | CORE_ADDR text_offset; | |
1052 | LONGEST off; | |
1053 | const gdb_byte *cfa_start, *cfa_end; | |
1054 | ||
1055 | if (dwarf2_fetch_cfa_info (arch, pc, per_cu, | |
1056 | ®num, &off, | |
1057 | &text_offset, &cfa_start, &cfa_end)) | |
1058 | { | |
1059 | /* Register. */ | |
1060 | pushf_register (indent, stream, registers_used, arch, regnum, | |
1061 | off); | |
1062 | } | |
1063 | else | |
1064 | { | |
1065 | /* Another expression. */ | |
1066 | char cfa_name[50]; | |
1067 | ||
1068 | /* Generate a unique-enough name, in case the CFA is | |
1069 | computed multiple times in this expression. */ | |
1070 | xsnprintf (cfa_name, sizeof (cfa_name), | |
1071 | "__cfa_%ld", (long) (op_ptr - base)); | |
1072 | ||
1073 | do_compile_dwarf_expr_to_c (indent, stream, | |
3a9558c4 | 1074 | GCC_UINTPTR, cfa_name, |
bb2ec1b3 TT |
1075 | sym, pc, arch, registers_used, |
1076 | addr_size, | |
1077 | cfa_start, cfa_end, | |
1078 | &text_offset, per_cu); | |
77b64a49 | 1079 | pushf (indent, stream, "%s", cfa_name); |
bb2ec1b3 TT |
1080 | } |
1081 | } | |
1082 | ||
1083 | break; | |
1084 | ||
1085 | case DW_OP_skip: | |
1086 | offset = extract_signed_integer (op_ptr, 2, byte_order); | |
1087 | op_ptr += 2; | |
d82b3862 | 1088 | fprintfi_filtered (indent, stream, "goto "); |
bb2ec1b3 | 1089 | print_label (stream, scope, op_ptr + offset - base); |
d82b3862 | 1090 | stream->puts (";\n"); |
bb2ec1b3 TT |
1091 | break; |
1092 | ||
1093 | case DW_OP_bra: | |
1094 | offset = extract_signed_integer (op_ptr, 2, byte_order); | |
1095 | op_ptr += 2; | |
d82b3862 | 1096 | fprintfi_filtered (indent, stream, |
bb2ec1b3 TT |
1097 | "if ((( " GCC_INTPTR |
1098 | ") __gdb_stack[__gdb_tos--]) != 0) goto "); | |
1099 | print_label (stream, scope, op_ptr + offset - base); | |
d82b3862 | 1100 | stream->puts (";\n"); |
bb2ec1b3 TT |
1101 | break; |
1102 | ||
1103 | case DW_OP_nop: | |
1104 | break; | |
1105 | ||
1106 | default: | |
1107 | error (_("unhandled DWARF op: %s"), get_DW_OP_name (op)); | |
1108 | } | |
1109 | } | |
1110 | ||
d82b3862 | 1111 | fprintfi_filtered (indent, stream, "%s = __gdb_stack[__gdb_tos];\n", |
3a9558c4 | 1112 | result_name); |
d82b3862 | 1113 | fprintfi_filtered (indent - 2, stream, "}\n"); |
bb2ec1b3 TT |
1114 | } |
1115 | ||
1116 | /* See compile.h. */ | |
1117 | ||
1118 | void | |
d82b3862 | 1119 | compile_dwarf_expr_to_c (string_file *stream, const char *result_name, |
bb2ec1b3 TT |
1120 | struct symbol *sym, CORE_ADDR pc, |
1121 | struct gdbarch *arch, unsigned char *registers_used, | |
1122 | unsigned int addr_size, | |
1123 | const gdb_byte *op_ptr, const gdb_byte *op_end, | |
1124 | struct dwarf2_per_cu_data *per_cu) | |
1125 | { | |
3a9558c4 | 1126 | do_compile_dwarf_expr_to_c (2, stream, GCC_UINTPTR, result_name, sym, pc, |
bb2ec1b3 TT |
1127 | arch, registers_used, addr_size, op_ptr, op_end, |
1128 | NULL, per_cu); | |
1129 | } | |
1130 | ||
1131 | /* See compile.h. */ | |
1132 | ||
1133 | void | |
d82b3862 | 1134 | compile_dwarf_bounds_to_c (string_file *stream, |
bb2ec1b3 TT |
1135 | const char *result_name, |
1136 | const struct dynamic_prop *prop, | |
1137 | struct symbol *sym, CORE_ADDR pc, | |
1138 | struct gdbarch *arch, unsigned char *registers_used, | |
1139 | unsigned int addr_size, | |
1140 | const gdb_byte *op_ptr, const gdb_byte *op_end, | |
1141 | struct dwarf2_per_cu_data *per_cu) | |
1142 | { | |
1143 | do_compile_dwarf_expr_to_c (2, stream, "unsigned long ", result_name, | |
1144 | sym, pc, arch, registers_used, | |
1145 | addr_size, op_ptr, op_end, NULL, per_cu); | |
1146 | } |