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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 | 32 | #include "value.h" |
0d12e84c | 33 | #include "gdbarch.h" |
bb2ec1b3 TT |
34 | |
35 | \f | |
36 | ||
37 | /* Information about a given instruction. */ | |
38 | ||
39 | struct insn_info | |
40 | { | |
41 | /* Stack depth at entry. */ | |
42 | ||
43 | unsigned int depth; | |
44 | ||
45 | /* Whether this instruction has been visited. */ | |
46 | ||
47 | unsigned int visited : 1; | |
48 | ||
49 | /* Whether this instruction needs a label. */ | |
50 | ||
51 | unsigned int label : 1; | |
52 | ||
4aa4e28b TT |
53 | /* Whether this instruction is DW_OP_GNU_push_tls_address or |
54 | DW_OP_form_tls_address. This is a hack until we can add a | |
55 | feature to glibc to let us properly generate code for TLS. */ | |
bb2ec1b3 TT |
56 | |
57 | unsigned int is_tls : 1; | |
58 | }; | |
59 | ||
60 | /* A helper function for compute_stack_depth that does the work. This | |
61 | examines the DWARF expression starting from START and computes | |
62 | stack effects. | |
63 | ||
64 | NEED_TEMPVAR is an out parameter which is set if this expression | |
65 | needs a special temporary variable to be emitted (see the code | |
66 | generator). | |
c6bcad5f | 67 | INFO is a vector of insn_info objects, indexed by offset from the |
bb2ec1b3 TT |
68 | start of the DWARF expression. |
69 | TO_DO is a list of bytecodes which must be examined; it may be | |
70 | added to by this function. | |
71 | BYTE_ORDER and ADDR_SIZE describe this bytecode in the obvious way. | |
72 | OP_PTR and OP_END are the bounds of the DWARF expression. */ | |
73 | ||
74 | static void | |
75 | compute_stack_depth_worker (int start, int *need_tempvar, | |
c6bcad5f | 76 | std::vector<struct insn_info> *info, |
711799d5 | 77 | std::vector<int> *to_do, |
bb2ec1b3 TT |
78 | enum bfd_endian byte_order, unsigned int addr_size, |
79 | const gdb_byte *op_ptr, const gdb_byte *op_end) | |
80 | { | |
81 | const gdb_byte * const base = op_ptr; | |
82 | int stack_depth; | |
83 | ||
84 | op_ptr += start; | |
c6bcad5f TT |
85 | gdb_assert ((*info)[start].visited); |
86 | stack_depth = (*info)[start].depth; | |
bb2ec1b3 TT |
87 | |
88 | while (op_ptr < op_end) | |
89 | { | |
aead7601 | 90 | enum dwarf_location_atom op = (enum dwarf_location_atom) *op_ptr; |
bb2ec1b3 TT |
91 | uint64_t reg; |
92 | int64_t offset; | |
93 | int ndx = op_ptr - base; | |
94 | ||
95 | #define SET_CHECK_DEPTH(WHERE) \ | |
c6bcad5f | 96 | if ((*info)[WHERE].visited) \ |
bb2ec1b3 | 97 | { \ |
c6bcad5f | 98 | if ((*info)[WHERE].depth != stack_depth) \ |
bb2ec1b3 TT |
99 | error (_("inconsistent stack depths")); \ |
100 | } \ | |
101 | else \ | |
102 | { \ | |
103 | /* Stack depth not set, so set it. */ \ | |
c6bcad5f TT |
104 | (*info)[WHERE].visited = 1; \ |
105 | (*info)[WHERE].depth = stack_depth; \ | |
bb2ec1b3 TT |
106 | } |
107 | ||
108 | SET_CHECK_DEPTH (ndx); | |
109 | ||
110 | ++op_ptr; | |
111 | ||
112 | switch (op) | |
113 | { | |
114 | case DW_OP_lit0: | |
115 | case DW_OP_lit1: | |
116 | case DW_OP_lit2: | |
117 | case DW_OP_lit3: | |
118 | case DW_OP_lit4: | |
119 | case DW_OP_lit5: | |
120 | case DW_OP_lit6: | |
121 | case DW_OP_lit7: | |
122 | case DW_OP_lit8: | |
123 | case DW_OP_lit9: | |
124 | case DW_OP_lit10: | |
125 | case DW_OP_lit11: | |
126 | case DW_OP_lit12: | |
127 | case DW_OP_lit13: | |
128 | case DW_OP_lit14: | |
129 | case DW_OP_lit15: | |
130 | case DW_OP_lit16: | |
131 | case DW_OP_lit17: | |
132 | case DW_OP_lit18: | |
133 | case DW_OP_lit19: | |
134 | case DW_OP_lit20: | |
135 | case DW_OP_lit21: | |
136 | case DW_OP_lit22: | |
137 | case DW_OP_lit23: | |
138 | case DW_OP_lit24: | |
139 | case DW_OP_lit25: | |
140 | case DW_OP_lit26: | |
141 | case DW_OP_lit27: | |
142 | case DW_OP_lit28: | |
143 | case DW_OP_lit29: | |
144 | case DW_OP_lit30: | |
145 | case DW_OP_lit31: | |
146 | ++stack_depth; | |
147 | break; | |
148 | ||
149 | case DW_OP_addr: | |
150 | op_ptr += addr_size; | |
151 | ++stack_depth; | |
152 | break; | |
153 | ||
154 | case DW_OP_const1u: | |
155 | case DW_OP_const1s: | |
156 | op_ptr += 1; | |
157 | ++stack_depth; | |
158 | break; | |
159 | case DW_OP_const2u: | |
160 | case DW_OP_const2s: | |
161 | op_ptr += 2; | |
162 | ++stack_depth; | |
163 | break; | |
164 | case DW_OP_const4u: | |
165 | case DW_OP_const4s: | |
166 | op_ptr += 4; | |
167 | ++stack_depth; | |
168 | break; | |
169 | case DW_OP_const8u: | |
170 | case DW_OP_const8s: | |
171 | op_ptr += 8; | |
172 | ++stack_depth; | |
173 | break; | |
174 | case DW_OP_constu: | |
175 | case DW_OP_consts: | |
176 | op_ptr = safe_read_sleb128 (op_ptr, op_end, &offset); | |
177 | ++stack_depth; | |
178 | break; | |
179 | ||
180 | case DW_OP_reg0: | |
181 | case DW_OP_reg1: | |
182 | case DW_OP_reg2: | |
183 | case DW_OP_reg3: | |
184 | case DW_OP_reg4: | |
185 | case DW_OP_reg5: | |
186 | case DW_OP_reg6: | |
187 | case DW_OP_reg7: | |
188 | case DW_OP_reg8: | |
189 | case DW_OP_reg9: | |
190 | case DW_OP_reg10: | |
191 | case DW_OP_reg11: | |
192 | case DW_OP_reg12: | |
193 | case DW_OP_reg13: | |
194 | case DW_OP_reg14: | |
195 | case DW_OP_reg15: | |
196 | case DW_OP_reg16: | |
197 | case DW_OP_reg17: | |
198 | case DW_OP_reg18: | |
199 | case DW_OP_reg19: | |
200 | case DW_OP_reg20: | |
201 | case DW_OP_reg21: | |
202 | case DW_OP_reg22: | |
203 | case DW_OP_reg23: | |
204 | case DW_OP_reg24: | |
205 | case DW_OP_reg25: | |
206 | case DW_OP_reg26: | |
207 | case DW_OP_reg27: | |
208 | case DW_OP_reg28: | |
209 | case DW_OP_reg29: | |
210 | case DW_OP_reg30: | |
211 | case DW_OP_reg31: | |
212 | ++stack_depth; | |
213 | break; | |
214 | ||
215 | case DW_OP_regx: | |
216 | op_ptr = safe_read_uleb128 (op_ptr, op_end, ®); | |
217 | ++stack_depth; | |
218 | break; | |
219 | ||
220 | case DW_OP_breg0: | |
221 | case DW_OP_breg1: | |
222 | case DW_OP_breg2: | |
223 | case DW_OP_breg3: | |
224 | case DW_OP_breg4: | |
225 | case DW_OP_breg5: | |
226 | case DW_OP_breg6: | |
227 | case DW_OP_breg7: | |
228 | case DW_OP_breg8: | |
229 | case DW_OP_breg9: | |
230 | case DW_OP_breg10: | |
231 | case DW_OP_breg11: | |
232 | case DW_OP_breg12: | |
233 | case DW_OP_breg13: | |
234 | case DW_OP_breg14: | |
235 | case DW_OP_breg15: | |
236 | case DW_OP_breg16: | |
237 | case DW_OP_breg17: | |
238 | case DW_OP_breg18: | |
239 | case DW_OP_breg19: | |
240 | case DW_OP_breg20: | |
241 | case DW_OP_breg21: | |
242 | case DW_OP_breg22: | |
243 | case DW_OP_breg23: | |
244 | case DW_OP_breg24: | |
245 | case DW_OP_breg25: | |
246 | case DW_OP_breg26: | |
247 | case DW_OP_breg27: | |
248 | case DW_OP_breg28: | |
249 | case DW_OP_breg29: | |
250 | case DW_OP_breg30: | |
251 | case DW_OP_breg31: | |
252 | op_ptr = safe_read_sleb128 (op_ptr, op_end, &offset); | |
253 | ++stack_depth; | |
254 | break; | |
255 | case DW_OP_bregx: | |
256 | { | |
257 | op_ptr = safe_read_uleb128 (op_ptr, op_end, ®); | |
258 | op_ptr = safe_read_sleb128 (op_ptr, op_end, &offset); | |
259 | ++stack_depth; | |
260 | } | |
261 | break; | |
262 | case DW_OP_fbreg: | |
263 | op_ptr = safe_read_sleb128 (op_ptr, op_end, &offset); | |
264 | ++stack_depth; | |
265 | break; | |
266 | ||
267 | case DW_OP_dup: | |
268 | ++stack_depth; | |
269 | break; | |
270 | ||
271 | case DW_OP_drop: | |
272 | --stack_depth; | |
273 | break; | |
274 | ||
275 | case DW_OP_pick: | |
276 | ++op_ptr; | |
277 | ++stack_depth; | |
278 | break; | |
279 | ||
280 | case DW_OP_rot: | |
281 | case DW_OP_swap: | |
282 | *need_tempvar = 1; | |
283 | break; | |
284 | ||
285 | case DW_OP_over: | |
286 | ++stack_depth; | |
287 | break; | |
288 | ||
289 | case DW_OP_abs: | |
290 | case DW_OP_neg: | |
291 | case DW_OP_not: | |
292 | case DW_OP_deref: | |
293 | break; | |
294 | ||
295 | case DW_OP_deref_size: | |
296 | ++op_ptr; | |
297 | break; | |
298 | ||
299 | case DW_OP_plus_uconst: | |
300 | op_ptr = safe_read_uleb128 (op_ptr, op_end, ®); | |
301 | break; | |
302 | ||
303 | case DW_OP_div: | |
304 | case DW_OP_shra: | |
305 | case DW_OP_and: | |
306 | case DW_OP_minus: | |
307 | case DW_OP_mod: | |
308 | case DW_OP_mul: | |
309 | case DW_OP_or: | |
310 | case DW_OP_plus: | |
311 | case DW_OP_shl: | |
312 | case DW_OP_shr: | |
313 | case DW_OP_xor: | |
314 | case DW_OP_le: | |
315 | case DW_OP_ge: | |
316 | case DW_OP_eq: | |
317 | case DW_OP_lt: | |
318 | case DW_OP_gt: | |
319 | case DW_OP_ne: | |
320 | --stack_depth; | |
321 | break; | |
322 | ||
323 | case DW_OP_call_frame_cfa: | |
324 | ++stack_depth; | |
325 | break; | |
326 | ||
327 | case DW_OP_GNU_push_tls_address: | |
4aa4e28b | 328 | case DW_OP_form_tls_address: |
c6bcad5f | 329 | (*info)[ndx].is_tls = 1; |
bb2ec1b3 TT |
330 | break; |
331 | ||
332 | case DW_OP_skip: | |
333 | offset = extract_signed_integer (op_ptr, 2, byte_order); | |
334 | op_ptr += 2; | |
335 | offset = op_ptr + offset - base; | |
336 | /* If the destination has not been seen yet, add it to the | |
337 | to-do list. */ | |
c6bcad5f | 338 | if (!(*info)[offset].visited) |
711799d5 | 339 | to_do->push_back (offset); |
bb2ec1b3 | 340 | SET_CHECK_DEPTH (offset); |
c6bcad5f | 341 | (*info)[offset].label = 1; |
bb2ec1b3 TT |
342 | /* We're done with this line of code. */ |
343 | return; | |
344 | ||
345 | case DW_OP_bra: | |
346 | offset = extract_signed_integer (op_ptr, 2, byte_order); | |
347 | op_ptr += 2; | |
348 | offset = op_ptr + offset - base; | |
349 | --stack_depth; | |
350 | /* If the destination has not been seen yet, add it to the | |
351 | to-do list. */ | |
c6bcad5f | 352 | if (!(*info)[offset].visited) |
711799d5 | 353 | to_do->push_back (offset); |
bb2ec1b3 | 354 | SET_CHECK_DEPTH (offset); |
c6bcad5f | 355 | (*info)[offset].label = 1; |
bb2ec1b3 TT |
356 | break; |
357 | ||
358 | case DW_OP_nop: | |
359 | break; | |
360 | ||
361 | default: | |
362 | error (_("unhandled DWARF op: %s"), get_DW_OP_name (op)); | |
363 | } | |
364 | } | |
365 | ||
366 | gdb_assert (op_ptr == op_end); | |
367 | ||
368 | #undef SET_CHECK_DEPTH | |
369 | } | |
370 | ||
371 | /* Compute the maximum needed stack depth of a DWARF expression, and | |
372 | some other information as well. | |
373 | ||
374 | BYTE_ORDER and ADDR_SIZE describe this bytecode in the obvious way. | |
375 | NEED_TEMPVAR is an out parameter which is set if this expression | |
376 | needs a special temporary variable to be emitted (see the code | |
377 | generator). | |
378 | IS_TLS is an out parameter which is set if this expression refers | |
379 | to a TLS variable. | |
380 | OP_PTR and OP_END are the bounds of the DWARF expression. | |
381 | INITIAL_DEPTH is the initial depth of the DWARF expression stack. | |
382 | INFO is an array of insn_info objects, indexed by offset from the | |
383 | start of the DWARF expression. | |
384 | ||
385 | This returns the maximum stack depth. */ | |
386 | ||
387 | static int | |
388 | compute_stack_depth (enum bfd_endian byte_order, unsigned int addr_size, | |
389 | int *need_tempvar, int *is_tls, | |
390 | const gdb_byte *op_ptr, const gdb_byte *op_end, | |
391 | int initial_depth, | |
c6bcad5f | 392 | std::vector<struct insn_info> *info) |
bb2ec1b3 | 393 | { |
711799d5 | 394 | std::vector<int> to_do; |
bb2ec1b3 TT |
395 | int stack_depth, i; |
396 | ||
c6bcad5f | 397 | info->resize (op_end - op_ptr); |
bb2ec1b3 | 398 | |
711799d5 | 399 | to_do.push_back (0); |
bb2ec1b3 TT |
400 | (*info)[0].depth = initial_depth; |
401 | (*info)[0].visited = 1; | |
402 | ||
711799d5 | 403 | while (!to_do.empty ()) |
bb2ec1b3 | 404 | { |
711799d5 TT |
405 | int ndx = to_do.back (); |
406 | to_do.pop_back (); | |
bb2ec1b3 | 407 | |
c6bcad5f | 408 | compute_stack_depth_worker (ndx, need_tempvar, info, &to_do, |
bb2ec1b3 TT |
409 | byte_order, addr_size, |
410 | op_ptr, op_end); | |
411 | } | |
412 | ||
413 | stack_depth = 0; | |
414 | *is_tls = 0; | |
415 | for (i = 0; i < op_end - op_ptr; ++i) | |
416 | { | |
417 | if ((*info)[i].depth > stack_depth) | |
418 | stack_depth = (*info)[i].depth; | |
419 | if ((*info)[i].is_tls) | |
420 | *is_tls = 1; | |
421 | } | |
422 | ||
bb2ec1b3 TT |
423 | return stack_depth + 1; |
424 | } | |
425 | ||
426 | \f | |
427 | ||
428 | #define GCC_UINTPTR "__gdb_uintptr" | |
429 | #define GCC_INTPTR "__gdb_intptr" | |
430 | ||
431 | /* Emit code to push a constant. */ | |
432 | ||
433 | static void | |
d82b3862 | 434 | push (int indent, string_file *stream, ULONGEST l) |
bb2ec1b3 | 435 | { |
d82b3862 | 436 | fprintfi_filtered (indent, stream, |
3a9558c4 | 437 | "__gdb_stack[++__gdb_tos] = (" GCC_UINTPTR ") %s;\n", |
bb2ec1b3 TT |
438 | hex_string (l)); |
439 | } | |
440 | ||
441 | /* Emit code to push an arbitrary expression. This works like | |
442 | printf. */ | |
443 | ||
d82b3862 | 444 | static void pushf (int indent, string_file *stream, const char *format, ...) |
77b64a49 PA |
445 | ATTRIBUTE_PRINTF (3, 4); |
446 | ||
bb2ec1b3 | 447 | static void |
d82b3862 | 448 | pushf (int indent, string_file *stream, const char *format, ...) |
bb2ec1b3 TT |
449 | { |
450 | va_list args; | |
451 | ||
d82b3862 | 452 | fprintfi_filtered (indent, stream, "__gdb_stack[__gdb_tos + 1] = "); |
bb2ec1b3 | 453 | va_start (args, format); |
d82b3862 | 454 | stream->vprintf (format, args); |
bb2ec1b3 | 455 | va_end (args); |
d82b3862 | 456 | stream->puts (";\n"); |
bb2ec1b3 | 457 | |
d82b3862 | 458 | fprintfi_filtered (indent, stream, "++__gdb_tos;\n"); |
bb2ec1b3 TT |
459 | } |
460 | ||
461 | /* Emit code for a unary expression -- one which operates in-place on | |
462 | the top-of-stack. This works like printf. */ | |
463 | ||
d82b3862 | 464 | static void unary (int indent, string_file *stream, const char *format, ...) |
77b64a49 PA |
465 | ATTRIBUTE_PRINTF (3, 4); |
466 | ||
bb2ec1b3 | 467 | static void |
d82b3862 | 468 | unary (int indent, string_file *stream, const char *format, ...) |
bb2ec1b3 TT |
469 | { |
470 | va_list args; | |
471 | ||
d82b3862 | 472 | fprintfi_filtered (indent, stream, "__gdb_stack[__gdb_tos] = "); |
bb2ec1b3 | 473 | va_start (args, format); |
d82b3862 | 474 | stream->vprintf (format, args); |
bb2ec1b3 | 475 | va_end (args); |
d82b3862 | 476 | stream->puts (";\n"); |
bb2ec1b3 TT |
477 | } |
478 | ||
479 | /* Emit code for a unary expression -- one which uses the top two | |
480 | stack items, popping the topmost one. This works like printf. */ | |
d82b3862 | 481 | static void binary (int indent, string_file *stream, const char *format, ...) |
77b64a49 | 482 | ATTRIBUTE_PRINTF (3, 4); |
bb2ec1b3 TT |
483 | |
484 | static void | |
d82b3862 | 485 | binary (int indent, string_file *stream, const char *format, ...) |
bb2ec1b3 TT |
486 | { |
487 | va_list args; | |
488 | ||
d82b3862 | 489 | fprintfi_filtered (indent, stream, "__gdb_stack[__gdb_tos - 1] = "); |
bb2ec1b3 | 490 | va_start (args, format); |
d82b3862 | 491 | stream->vprintf (format, args); |
bb2ec1b3 | 492 | va_end (args); |
d82b3862 SM |
493 | stream->puts (";\n"); |
494 | fprintfi_filtered (indent, stream, "--__gdb_tos;\n"); | |
bb2ec1b3 TT |
495 | } |
496 | ||
497 | /* Print the name of a label given its "SCOPE", an arbitrary integer | |
498 | used for uniqueness, and its TARGET, the bytecode offset | |
499 | corresponding to the label's point of definition. */ | |
500 | ||
501 | static void | |
d82b3862 | 502 | print_label (string_file *stream, unsigned int scope, int target) |
bb2ec1b3 | 503 | { |
d82b3862 | 504 | stream->printf ("__label_%u_%s", scope, pulongest (target)); |
bb2ec1b3 TT |
505 | } |
506 | ||
507 | /* Emit code that pushes a register's address on the stack. | |
508 | REGISTERS_USED is an out parameter which is updated to note which | |
509 | register was needed by this expression. */ | |
510 | ||
511 | static void | |
d82b3862 | 512 | pushf_register_address (int indent, string_file *stream, |
bb2ec1b3 TT |
513 | unsigned char *registers_used, |
514 | struct gdbarch *gdbarch, int regnum) | |
515 | { | |
8f84fb0e | 516 | std::string regname = compile_register_name_mangled (gdbarch, regnum); |
bb2ec1b3 TT |
517 | |
518 | registers_used[regnum] = 1; | |
3a9558c4 JK |
519 | pushf (indent, stream, |
520 | "(" GCC_UINTPTR ") &" COMPILE_I_SIMPLE_REGISTER_ARG_NAME "->%s", | |
8f84fb0e | 521 | regname.c_str ()); |
bb2ec1b3 TT |
522 | } |
523 | ||
524 | /* Emit code that pushes a register's value on the stack. | |
525 | REGISTERS_USED is an out parameter which is updated to note which | |
526 | register was needed by this expression. OFFSET is added to the | |
527 | register's value before it is pushed. */ | |
528 | ||
529 | static void | |
d82b3862 | 530 | pushf_register (int indent, string_file *stream, |
bb2ec1b3 TT |
531 | unsigned char *registers_used, |
532 | struct gdbarch *gdbarch, int regnum, uint64_t offset) | |
533 | { | |
8f84fb0e | 534 | std::string regname = compile_register_name_mangled (gdbarch, regnum); |
bb2ec1b3 TT |
535 | |
536 | registers_used[regnum] = 1; | |
537 | if (offset == 0) | |
538 | pushf (indent, stream, COMPILE_I_SIMPLE_REGISTER_ARG_NAME "->%s", | |
8f84fb0e | 539 | regname.c_str ()); |
bb2ec1b3 | 540 | else |
3a9558c4 JK |
541 | pushf (indent, stream, |
542 | COMPILE_I_SIMPLE_REGISTER_ARG_NAME "->%s + (" GCC_UINTPTR ") %s", | |
8f84fb0e | 543 | regname.c_str (), hex_string (offset)); |
bb2ec1b3 TT |
544 | } |
545 | ||
546 | /* Compile a DWARF expression to C code. | |
547 | ||
548 | INDENT is the indentation level to use. | |
549 | STREAM is the stream where the code should be written. | |
550 | ||
551 | TYPE_NAME names the type of the result of the DWARF expression. | |
552 | For locations this is "void *" but for array bounds it will be an | |
553 | integer type. | |
554 | ||
555 | RESULT_NAME is the name of a variable in the resulting C code. The | |
556 | result of the expression will be assigned to this variable. | |
557 | ||
558 | SYM is the symbol corresponding to this expression. | |
559 | PC is the location at which the expression is being evaluated. | |
560 | ARCH is the architecture to use. | |
561 | ||
562 | REGISTERS_USED is an out parameter which is updated to note which | |
563 | registers were needed by this expression. | |
564 | ||
565 | ADDR_SIZE is the DWARF address size to use. | |
566 | ||
567 | OPT_PTR and OP_END are the bounds of the DWARF expression. | |
568 | ||
569 | If non-NULL, INITIAL points to an initial value to write to the | |
570 | stack. If NULL, no initial value is written. | |
571 | ||
572 | PER_CU is the per-CU object used for looking up various other | |
573 | things. */ | |
574 | ||
575 | static void | |
d82b3862 | 576 | do_compile_dwarf_expr_to_c (int indent, string_file *stream, |
bb2ec1b3 TT |
577 | const char *type_name, |
578 | const char *result_name, | |
579 | struct symbol *sym, CORE_ADDR pc, | |
580 | struct gdbarch *arch, | |
581 | unsigned char *registers_used, | |
582 | unsigned int addr_size, | |
583 | const gdb_byte *op_ptr, const gdb_byte *op_end, | |
584 | CORE_ADDR *initial, | |
585 | struct dwarf2_per_cu_data *per_cu) | |
586 | { | |
587 | /* We keep a counter so that labels and other objects we create have | |
588 | unique names. */ | |
589 | static unsigned int scope; | |
590 | ||
591 | enum bfd_endian byte_order = gdbarch_byte_order (arch); | |
592 | const gdb_byte * const base = op_ptr; | |
593 | int need_tempvar = 0; | |
594 | int is_tls = 0; | |
c6bcad5f | 595 | std::vector<struct insn_info> info; |
bb2ec1b3 TT |
596 | int stack_depth; |
597 | ||
598 | ++scope; | |
599 | ||
d82b3862 | 600 | fprintfi_filtered (indent, stream, "__attribute__ ((unused)) %s %s;\n", |
3a9558c4 | 601 | type_name, result_name); |
d82b3862 | 602 | fprintfi_filtered (indent, stream, "{\n"); |
bb2ec1b3 TT |
603 | indent += 2; |
604 | ||
605 | stack_depth = compute_stack_depth (byte_order, addr_size, | |
606 | &need_tempvar, &is_tls, | |
607 | op_ptr, op_end, initial != NULL, | |
608 | &info); | |
bb2ec1b3 TT |
609 | |
610 | /* This is a hack until we can add a feature to glibc to let us | |
611 | properly generate code for TLS. You might think we could emit | |
612 | the address in the ordinary course of translating | |
613 | DW_OP_GNU_push_tls_address, but since the operand appears on the | |
614 | stack, it is relatively hard to find, and the idea of calling | |
615 | target_translate_tls_address with OFFSET==0 and then adding the | |
616 | offset by hand seemed too hackish. */ | |
617 | if (is_tls) | |
618 | { | |
619 | struct frame_info *frame = get_selected_frame (NULL); | |
620 | struct value *val; | |
621 | ||
622 | if (frame == NULL) | |
623 | error (_("Symbol \"%s\" cannot be used because " | |
624 | "there is no selected frame"), | |
625 | SYMBOL_PRINT_NAME (sym)); | |
626 | ||
63e43d3a | 627 | val = read_var_value (sym, NULL, frame); |
bb2ec1b3 TT |
628 | if (VALUE_LVAL (val) != lval_memory) |
629 | error (_("Symbol \"%s\" cannot be used for compilation evaluation " | |
630 | "as its address has not been found."), | |
631 | SYMBOL_PRINT_NAME (sym)); | |
632 | ||
633 | warning (_("Symbol \"%s\" is thread-local and currently can only " | |
634 | "be referenced from the current thread in " | |
635 | "compiled code."), | |
636 | SYMBOL_PRINT_NAME (sym)); | |
637 | ||
d82b3862 | 638 | fprintfi_filtered (indent, stream, "%s = %s;\n", |
bb2ec1b3 TT |
639 | result_name, |
640 | core_addr_to_string (value_address (val))); | |
d82b3862 | 641 | fprintfi_filtered (indent - 2, stream, "}\n"); |
bb2ec1b3 TT |
642 | return; |
643 | } | |
644 | ||
d82b3862 | 645 | fprintfi_filtered (indent, stream, GCC_UINTPTR " __gdb_stack[%d];\n", |
bb2ec1b3 TT |
646 | stack_depth); |
647 | ||
648 | if (need_tempvar) | |
d82b3862 SM |
649 | fprintfi_filtered (indent, stream, GCC_UINTPTR " __gdb_tmp;\n"); |
650 | fprintfi_filtered (indent, stream, "int __gdb_tos = -1;\n"); | |
bb2ec1b3 TT |
651 | |
652 | if (initial != NULL) | |
77b64a49 | 653 | pushf (indent, stream, "%s", core_addr_to_string (*initial)); |
bb2ec1b3 TT |
654 | |
655 | while (op_ptr < op_end) | |
656 | { | |
aead7601 | 657 | enum dwarf_location_atom op = (enum dwarf_location_atom) *op_ptr; |
bb2ec1b3 TT |
658 | uint64_t uoffset, reg; |
659 | int64_t offset; | |
660 | ||
d82b3862 | 661 | print_spaces (indent - 2, stream); |
bb2ec1b3 TT |
662 | if (info[op_ptr - base].label) |
663 | { | |
664 | print_label (stream, scope, op_ptr - base); | |
d82b3862 | 665 | stream->puts (":;"); |
bb2ec1b3 | 666 | } |
d82b3862 | 667 | stream->printf ("/* %s */\n", get_DW_OP_name (op)); |
bb2ec1b3 TT |
668 | |
669 | /* This is handy for debugging the generated code: | |
670 | fprintf_filtered (stream, "if (__gdb_tos != %d) abort ();\n", | |
671 | (int) info[op_ptr - base].depth - 1); | |
672 | */ | |
673 | ||
674 | ++op_ptr; | |
675 | ||
676 | switch (op) | |
677 | { | |
678 | case DW_OP_lit0: | |
679 | case DW_OP_lit1: | |
680 | case DW_OP_lit2: | |
681 | case DW_OP_lit3: | |
682 | case DW_OP_lit4: | |
683 | case DW_OP_lit5: | |
684 | case DW_OP_lit6: | |
685 | case DW_OP_lit7: | |
686 | case DW_OP_lit8: | |
687 | case DW_OP_lit9: | |
688 | case DW_OP_lit10: | |
689 | case DW_OP_lit11: | |
690 | case DW_OP_lit12: | |
691 | case DW_OP_lit13: | |
692 | case DW_OP_lit14: | |
693 | case DW_OP_lit15: | |
694 | case DW_OP_lit16: | |
695 | case DW_OP_lit17: | |
696 | case DW_OP_lit18: | |
697 | case DW_OP_lit19: | |
698 | case DW_OP_lit20: | |
699 | case DW_OP_lit21: | |
700 | case DW_OP_lit22: | |
701 | case DW_OP_lit23: | |
702 | case DW_OP_lit24: | |
703 | case DW_OP_lit25: | |
704 | case DW_OP_lit26: | |
705 | case DW_OP_lit27: | |
706 | case DW_OP_lit28: | |
707 | case DW_OP_lit29: | |
708 | case DW_OP_lit30: | |
709 | case DW_OP_lit31: | |
710 | push (indent, stream, op - DW_OP_lit0); | |
711 | break; | |
712 | ||
713 | case DW_OP_addr: | |
266934d1 | 714 | uoffset = extract_unsigned_integer (op_ptr, addr_size, byte_order); |
bb2ec1b3 TT |
715 | op_ptr += addr_size; |
716 | /* Some versions of GCC emit DW_OP_addr before | |
717 | DW_OP_GNU_push_tls_address. In this case the value is an | |
718 | index, not an address. We don't support things like | |
719 | branching between the address and the TLS op. */ | |
720 | if (op_ptr >= op_end || *op_ptr != DW_OP_GNU_push_tls_address) | |
721 | uoffset += dwarf2_per_cu_text_offset (per_cu); | |
722 | push (indent, stream, uoffset); | |
723 | break; | |
724 | ||
725 | case DW_OP_const1u: | |
726 | push (indent, stream, | |
727 | extract_unsigned_integer (op_ptr, 1, byte_order)); | |
728 | op_ptr += 1; | |
729 | break; | |
730 | case DW_OP_const1s: | |
731 | push (indent, stream, | |
732 | extract_signed_integer (op_ptr, 1, byte_order)); | |
733 | op_ptr += 1; | |
734 | break; | |
735 | case DW_OP_const2u: | |
736 | push (indent, stream, | |
737 | extract_unsigned_integer (op_ptr, 2, byte_order)); | |
738 | op_ptr += 2; | |
739 | break; | |
740 | case DW_OP_const2s: | |
741 | push (indent, stream, | |
742 | extract_signed_integer (op_ptr, 2, byte_order)); | |
743 | op_ptr += 2; | |
744 | break; | |
745 | case DW_OP_const4u: | |
746 | push (indent, stream, | |
747 | extract_unsigned_integer (op_ptr, 4, byte_order)); | |
748 | op_ptr += 4; | |
749 | break; | |
750 | case DW_OP_const4s: | |
751 | push (indent, stream, | |
752 | extract_signed_integer (op_ptr, 4, byte_order)); | |
753 | op_ptr += 4; | |
754 | break; | |
755 | case DW_OP_const8u: | |
756 | push (indent, stream, | |
757 | extract_unsigned_integer (op_ptr, 8, byte_order)); | |
758 | op_ptr += 8; | |
759 | break; | |
760 | case DW_OP_const8s: | |
761 | push (indent, stream, | |
762 | extract_signed_integer (op_ptr, 8, byte_order)); | |
763 | op_ptr += 8; | |
764 | break; | |
765 | case DW_OP_constu: | |
766 | op_ptr = safe_read_uleb128 (op_ptr, op_end, &uoffset); | |
767 | push (indent, stream, uoffset); | |
768 | break; | |
769 | case DW_OP_consts: | |
770 | op_ptr = safe_read_sleb128 (op_ptr, op_end, &offset); | |
771 | push (indent, stream, offset); | |
772 | break; | |
773 | ||
774 | case DW_OP_reg0: | |
775 | case DW_OP_reg1: | |
776 | case DW_OP_reg2: | |
777 | case DW_OP_reg3: | |
778 | case DW_OP_reg4: | |
779 | case DW_OP_reg5: | |
780 | case DW_OP_reg6: | |
781 | case DW_OP_reg7: | |
782 | case DW_OP_reg8: | |
783 | case DW_OP_reg9: | |
784 | case DW_OP_reg10: | |
785 | case DW_OP_reg11: | |
786 | case DW_OP_reg12: | |
787 | case DW_OP_reg13: | |
788 | case DW_OP_reg14: | |
789 | case DW_OP_reg15: | |
790 | case DW_OP_reg16: | |
791 | case DW_OP_reg17: | |
792 | case DW_OP_reg18: | |
793 | case DW_OP_reg19: | |
794 | case DW_OP_reg20: | |
795 | case DW_OP_reg21: | |
796 | case DW_OP_reg22: | |
797 | case DW_OP_reg23: | |
798 | case DW_OP_reg24: | |
799 | case DW_OP_reg25: | |
800 | case DW_OP_reg26: | |
801 | case DW_OP_reg27: | |
802 | case DW_OP_reg28: | |
803 | case DW_OP_reg29: | |
804 | case DW_OP_reg30: | |
805 | case DW_OP_reg31: | |
806 | dwarf_expr_require_composition (op_ptr, op_end, "DW_OP_regx"); | |
807 | pushf_register_address (indent, stream, registers_used, arch, | |
0fde2c53 DE |
808 | dwarf_reg_to_regnum_or_error |
809 | (arch, op - DW_OP_reg0)); | |
bb2ec1b3 TT |
810 | break; |
811 | ||
812 | case DW_OP_regx: | |
813 | op_ptr = safe_read_uleb128 (op_ptr, op_end, ®); | |
814 | dwarf_expr_require_composition (op_ptr, op_end, "DW_OP_regx"); | |
815 | pushf_register_address (indent, stream, registers_used, arch, | |
0fde2c53 | 816 | dwarf_reg_to_regnum_or_error (arch, reg)); |
bb2ec1b3 TT |
817 | break; |
818 | ||
819 | case DW_OP_breg0: | |
820 | case DW_OP_breg1: | |
821 | case DW_OP_breg2: | |
822 | case DW_OP_breg3: | |
823 | case DW_OP_breg4: | |
824 | case DW_OP_breg5: | |
825 | case DW_OP_breg6: | |
826 | case DW_OP_breg7: | |
827 | case DW_OP_breg8: | |
828 | case DW_OP_breg9: | |
829 | case DW_OP_breg10: | |
830 | case DW_OP_breg11: | |
831 | case DW_OP_breg12: | |
832 | case DW_OP_breg13: | |
833 | case DW_OP_breg14: | |
834 | case DW_OP_breg15: | |
835 | case DW_OP_breg16: | |
836 | case DW_OP_breg17: | |
837 | case DW_OP_breg18: | |
838 | case DW_OP_breg19: | |
839 | case DW_OP_breg20: | |
840 | case DW_OP_breg21: | |
841 | case DW_OP_breg22: | |
842 | case DW_OP_breg23: | |
843 | case DW_OP_breg24: | |
844 | case DW_OP_breg25: | |
845 | case DW_OP_breg26: | |
846 | case DW_OP_breg27: | |
847 | case DW_OP_breg28: | |
848 | case DW_OP_breg29: | |
849 | case DW_OP_breg30: | |
850 | case DW_OP_breg31: | |
851 | op_ptr = safe_read_sleb128 (op_ptr, op_end, &offset); | |
852 | pushf_register (indent, stream, registers_used, arch, | |
0fde2c53 DE |
853 | dwarf_reg_to_regnum_or_error (arch, |
854 | op - DW_OP_breg0), | |
bb2ec1b3 TT |
855 | offset); |
856 | break; | |
857 | case DW_OP_bregx: | |
858 | { | |
859 | op_ptr = safe_read_uleb128 (op_ptr, op_end, ®); | |
860 | op_ptr = safe_read_sleb128 (op_ptr, op_end, &offset); | |
861 | pushf_register (indent, stream, registers_used, arch, | |
0fde2c53 | 862 | dwarf_reg_to_regnum_or_error (arch, reg), offset); |
bb2ec1b3 TT |
863 | } |
864 | break; | |
865 | case DW_OP_fbreg: | |
866 | { | |
867 | const gdb_byte *datastart; | |
868 | size_t datalen; | |
869 | const struct block *b; | |
870 | struct symbol *framefunc; | |
871 | char fb_name[50]; | |
872 | ||
873 | b = block_for_pc (pc); | |
874 | ||
875 | if (!b) | |
876 | error (_("No block found for address")); | |
877 | ||
878 | framefunc = block_linkage_function (b); | |
879 | ||
880 | if (!framefunc) | |
881 | error (_("No function found for block")); | |
882 | ||
883 | func_get_frame_base_dwarf_block (framefunc, pc, | |
884 | &datastart, &datalen); | |
885 | ||
886 | op_ptr = safe_read_sleb128 (op_ptr, op_end, &offset); | |
887 | ||
888 | /* Generate a unique-enough name, in case the frame base | |
889 | is computed multiple times in this expression. */ | |
890 | xsnprintf (fb_name, sizeof (fb_name), "__frame_base_%ld", | |
891 | (long) (op_ptr - base)); | |
892 | ||
893 | do_compile_dwarf_expr_to_c (indent, stream, | |
3a9558c4 | 894 | GCC_UINTPTR, fb_name, |
bb2ec1b3 TT |
895 | sym, pc, |
896 | arch, registers_used, addr_size, | |
897 | datastart, datastart + datalen, | |
898 | NULL, per_cu); | |
899 | ||
900 | pushf (indent, stream, "%s + %s", fb_name, hex_string (offset)); | |
901 | } | |
902 | break; | |
903 | ||
904 | case DW_OP_dup: | |
905 | pushf (indent, stream, "__gdb_stack[__gdb_tos]"); | |
906 | break; | |
907 | ||
908 | case DW_OP_drop: | |
d82b3862 | 909 | fprintfi_filtered (indent, stream, "--__gdb_tos;\n"); |
bb2ec1b3 TT |
910 | break; |
911 | ||
912 | case DW_OP_pick: | |
913 | offset = *op_ptr++; | |
77b64a49 PA |
914 | pushf (indent, stream, "__gdb_stack[__gdb_tos - %s]", |
915 | plongest (offset)); | |
bb2ec1b3 TT |
916 | break; |
917 | ||
918 | case DW_OP_swap: | |
d82b3862 | 919 | fprintfi_filtered (indent, stream, |
bb2ec1b3 | 920 | "__gdb_tmp = __gdb_stack[__gdb_tos - 1];\n"); |
d82b3862 | 921 | fprintfi_filtered (indent, stream, |
bb2ec1b3 TT |
922 | "__gdb_stack[__gdb_tos - 1] = " |
923 | "__gdb_stack[__gdb_tos];\n"); | |
d82b3862 SM |
924 | fprintfi_filtered (indent, stream, ("__gdb_stack[__gdb_tos] = " |
925 | "__gdb_tmp;\n")); | |
bb2ec1b3 TT |
926 | break; |
927 | ||
928 | case DW_OP_over: | |
929 | pushf (indent, stream, "__gdb_stack[__gdb_tos - 1]"); | |
930 | break; | |
931 | ||
932 | case DW_OP_rot: | |
d82b3862 SM |
933 | fprintfi_filtered (indent, stream, ("__gdb_tmp = " |
934 | "__gdb_stack[__gdb_tos];\n")); | |
935 | fprintfi_filtered (indent, stream, | |
bb2ec1b3 TT |
936 | "__gdb_stack[__gdb_tos] = " |
937 | "__gdb_stack[__gdb_tos - 1];\n"); | |
d82b3862 | 938 | fprintfi_filtered (indent, stream, |
bb2ec1b3 TT |
939 | "__gdb_stack[__gdb_tos - 1] = " |
940 | "__gdb_stack[__gdb_tos -2];\n"); | |
d82b3862 | 941 | fprintfi_filtered (indent, stream, "__gdb_stack[__gdb_tos - 2] = " |
bb2ec1b3 TT |
942 | "__gdb_tmp;\n"); |
943 | break; | |
944 | ||
945 | case DW_OP_deref: | |
946 | case DW_OP_deref_size: | |
947 | { | |
948 | int size; | |
949 | const char *mode; | |
950 | ||
951 | if (op == DW_OP_deref_size) | |
952 | size = *op_ptr++; | |
953 | else | |
954 | size = addr_size; | |
955 | ||
956 | mode = c_get_mode_for_size (size); | |
957 | if (mode == NULL) | |
958 | error (_("Unsupported size %d in %s"), | |
959 | size, get_DW_OP_name (op)); | |
960 | ||
961 | /* Cast to a pointer of the desired type, then | |
962 | dereference. */ | |
d82b3862 | 963 | fprintfi_filtered (indent, stream, |
bb2ec1b3 TT |
964 | "__gdb_stack[__gdb_tos] = " |
965 | "*((__gdb_int_%s *) " | |
966 | "__gdb_stack[__gdb_tos]);\n", | |
967 | mode); | |
968 | } | |
969 | break; | |
970 | ||
971 | case DW_OP_abs: | |
972 | unary (indent, stream, | |
973 | "((" GCC_INTPTR ") __gdb_stack[__gdb_tos]) < 0 ? " | |
974 | "-__gdb_stack[__gdb_tos] : __gdb_stack[__gdb_tos]"); | |
975 | break; | |
976 | ||
977 | case DW_OP_neg: | |
978 | unary (indent, stream, "-__gdb_stack[__gdb_tos]"); | |
979 | break; | |
980 | ||
981 | case DW_OP_not: | |
982 | unary (indent, stream, "~__gdb_stack[__gdb_tos]"); | |
983 | break; | |
984 | ||
985 | case DW_OP_plus_uconst: | |
986 | op_ptr = safe_read_uleb128 (op_ptr, op_end, ®); | |
987 | unary (indent, stream, "__gdb_stack[__gdb_tos] + %s", | |
988 | hex_string (reg)); | |
989 | break; | |
990 | ||
991 | case DW_OP_div: | |
992 | binary (indent, stream, ("((" GCC_INTPTR | |
993 | ") __gdb_stack[__gdb_tos-1]) / ((" | |
994 | GCC_INTPTR ") __gdb_stack[__gdb_tos])")); | |
995 | break; | |
996 | ||
997 | case DW_OP_shra: | |
998 | binary (indent, stream, | |
999 | "((" GCC_INTPTR ") __gdb_stack[__gdb_tos-1]) >> " | |
1000 | "__gdb_stack[__gdb_tos]"); | |
1001 | break; | |
1002 | ||
1003 | #define BINARY(OP) \ | |
77b64a49 PA |
1004 | binary (indent, stream, "%s", "__gdb_stack[__gdb_tos-1] " #OP \ |
1005 | " __gdb_stack[__gdb_tos]"); \ | |
bb2ec1b3 TT |
1006 | break |
1007 | ||
1008 | case DW_OP_and: | |
1009 | BINARY (&); | |
1010 | case DW_OP_minus: | |
1011 | BINARY (-); | |
1012 | case DW_OP_mod: | |
1013 | BINARY (%); | |
1014 | case DW_OP_mul: | |
1015 | BINARY (*); | |
1016 | case DW_OP_or: | |
1017 | BINARY (|); | |
1018 | case DW_OP_plus: | |
1019 | BINARY (+); | |
1020 | case DW_OP_shl: | |
1021 | BINARY (<<); | |
1022 | case DW_OP_shr: | |
1023 | BINARY (>>); | |
1024 | case DW_OP_xor: | |
1025 | BINARY (^); | |
1026 | #undef BINARY | |
1027 | ||
1028 | #define COMPARE(OP) \ | |
1029 | binary (indent, stream, \ | |
1030 | "(((" GCC_INTPTR ") __gdb_stack[__gdb_tos-1]) " #OP \ | |
1031 | " ((" GCC_INTPTR \ | |
1032 | ") __gdb_stack[__gdb_tos]))"); \ | |
1033 | break | |
1034 | ||
1035 | case DW_OP_le: | |
1036 | COMPARE (<=); | |
1037 | case DW_OP_ge: | |
1038 | COMPARE (>=); | |
1039 | case DW_OP_eq: | |
1040 | COMPARE (==); | |
1041 | case DW_OP_lt: | |
1042 | COMPARE (<); | |
1043 | case DW_OP_gt: | |
1044 | COMPARE (>); | |
1045 | case DW_OP_ne: | |
1046 | COMPARE (!=); | |
1047 | #undef COMPARE | |
1048 | ||
1049 | case DW_OP_call_frame_cfa: | |
1050 | { | |
1051 | int regnum; | |
1052 | CORE_ADDR text_offset; | |
1053 | LONGEST off; | |
1054 | const gdb_byte *cfa_start, *cfa_end; | |
1055 | ||
1056 | if (dwarf2_fetch_cfa_info (arch, pc, per_cu, | |
1057 | ®num, &off, | |
1058 | &text_offset, &cfa_start, &cfa_end)) | |
1059 | { | |
1060 | /* Register. */ | |
1061 | pushf_register (indent, stream, registers_used, arch, regnum, | |
1062 | off); | |
1063 | } | |
1064 | else | |
1065 | { | |
1066 | /* Another expression. */ | |
1067 | char cfa_name[50]; | |
1068 | ||
1069 | /* Generate a unique-enough name, in case the CFA is | |
1070 | computed multiple times in this expression. */ | |
1071 | xsnprintf (cfa_name, sizeof (cfa_name), | |
1072 | "__cfa_%ld", (long) (op_ptr - base)); | |
1073 | ||
1074 | do_compile_dwarf_expr_to_c (indent, stream, | |
3a9558c4 | 1075 | GCC_UINTPTR, cfa_name, |
bb2ec1b3 TT |
1076 | sym, pc, arch, registers_used, |
1077 | addr_size, | |
1078 | cfa_start, cfa_end, | |
1079 | &text_offset, per_cu); | |
77b64a49 | 1080 | pushf (indent, stream, "%s", cfa_name); |
bb2ec1b3 TT |
1081 | } |
1082 | } | |
1083 | ||
1084 | break; | |
1085 | ||
1086 | case DW_OP_skip: | |
1087 | offset = extract_signed_integer (op_ptr, 2, byte_order); | |
1088 | op_ptr += 2; | |
d82b3862 | 1089 | fprintfi_filtered (indent, stream, "goto "); |
bb2ec1b3 | 1090 | print_label (stream, scope, op_ptr + offset - base); |
d82b3862 | 1091 | stream->puts (";\n"); |
bb2ec1b3 TT |
1092 | break; |
1093 | ||
1094 | case DW_OP_bra: | |
1095 | offset = extract_signed_integer (op_ptr, 2, byte_order); | |
1096 | op_ptr += 2; | |
d82b3862 | 1097 | fprintfi_filtered (indent, stream, |
bb2ec1b3 TT |
1098 | "if ((( " GCC_INTPTR |
1099 | ") __gdb_stack[__gdb_tos--]) != 0) goto "); | |
1100 | print_label (stream, scope, op_ptr + offset - base); | |
d82b3862 | 1101 | stream->puts (";\n"); |
bb2ec1b3 TT |
1102 | break; |
1103 | ||
1104 | case DW_OP_nop: | |
1105 | break; | |
1106 | ||
1107 | default: | |
1108 | error (_("unhandled DWARF op: %s"), get_DW_OP_name (op)); | |
1109 | } | |
1110 | } | |
1111 | ||
d82b3862 | 1112 | fprintfi_filtered (indent, stream, "%s = __gdb_stack[__gdb_tos];\n", |
3a9558c4 | 1113 | result_name); |
d82b3862 | 1114 | fprintfi_filtered (indent - 2, stream, "}\n"); |
bb2ec1b3 TT |
1115 | } |
1116 | ||
1117 | /* See compile.h. */ | |
1118 | ||
1119 | void | |
d82b3862 | 1120 | compile_dwarf_expr_to_c (string_file *stream, const char *result_name, |
bb2ec1b3 TT |
1121 | struct symbol *sym, CORE_ADDR pc, |
1122 | struct gdbarch *arch, unsigned char *registers_used, | |
1123 | unsigned int addr_size, | |
1124 | const gdb_byte *op_ptr, const gdb_byte *op_end, | |
1125 | struct dwarf2_per_cu_data *per_cu) | |
1126 | { | |
3a9558c4 | 1127 | do_compile_dwarf_expr_to_c (2, stream, GCC_UINTPTR, result_name, sym, pc, |
bb2ec1b3 TT |
1128 | arch, registers_used, addr_size, op_ptr, op_end, |
1129 | NULL, per_cu); | |
1130 | } | |
1131 | ||
1132 | /* See compile.h. */ | |
1133 | ||
1134 | void | |
d82b3862 | 1135 | compile_dwarf_bounds_to_c (string_file *stream, |
bb2ec1b3 TT |
1136 | const char *result_name, |
1137 | const struct dynamic_prop *prop, | |
1138 | struct symbol *sym, CORE_ADDR pc, | |
1139 | struct gdbarch *arch, unsigned char *registers_used, | |
1140 | unsigned int addr_size, | |
1141 | const gdb_byte *op_ptr, const gdb_byte *op_end, | |
1142 | struct dwarf2_per_cu_data *per_cu) | |
1143 | { | |
1144 | do_compile_dwarf_expr_to_c (2, stream, "unsigned long ", result_name, | |
1145 | sym, pc, arch, registers_used, | |
1146 | addr_size, op_ptr, op_end, NULL, per_cu); | |
1147 | } |