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bb2ec1b3 TT |
1 | /* Convert a DWARF location expression to C |
2 | ||
e2882c85 | 3 | Copyright (C) 2014-2018 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" | |
27 | #include "compile.h" | |
28 | #include "block.h" | |
29 | #include "dwarf2-frame.h" | |
30 | #include "gdb_vecs.h" | |
31 | #include "value.h" | |
32 | ||
33 | \f | |
34 | ||
35 | /* Information about a given instruction. */ | |
36 | ||
37 | struct insn_info | |
38 | { | |
39 | /* Stack depth at entry. */ | |
40 | ||
41 | unsigned int depth; | |
42 | ||
43 | /* Whether this instruction has been visited. */ | |
44 | ||
45 | unsigned int visited : 1; | |
46 | ||
47 | /* Whether this instruction needs a label. */ | |
48 | ||
49 | unsigned int label : 1; | |
50 | ||
4aa4e28b TT |
51 | /* Whether this instruction is DW_OP_GNU_push_tls_address or |
52 | DW_OP_form_tls_address. This is a hack until we can add a | |
53 | feature to glibc to let us properly generate code for TLS. */ | |
bb2ec1b3 TT |
54 | |
55 | unsigned int is_tls : 1; | |
56 | }; | |
57 | ||
58 | /* A helper function for compute_stack_depth that does the work. This | |
59 | examines the DWARF expression starting from START and computes | |
60 | stack effects. | |
61 | ||
62 | NEED_TEMPVAR is an out parameter which is set if this expression | |
63 | needs a special temporary variable to be emitted (see the code | |
64 | generator). | |
c6bcad5f | 65 | INFO is a vector of insn_info objects, indexed by offset from the |
bb2ec1b3 TT |
66 | start of the DWARF expression. |
67 | TO_DO is a list of bytecodes which must be examined; it may be | |
68 | added to by this function. | |
69 | BYTE_ORDER and ADDR_SIZE describe this bytecode in the obvious way. | |
70 | OP_PTR and OP_END are the bounds of the DWARF expression. */ | |
71 | ||
72 | static void | |
73 | compute_stack_depth_worker (int start, int *need_tempvar, | |
c6bcad5f | 74 | std::vector<struct insn_info> *info, |
711799d5 | 75 | std::vector<int> *to_do, |
bb2ec1b3 TT |
76 | enum bfd_endian byte_order, unsigned int addr_size, |
77 | const gdb_byte *op_ptr, const gdb_byte *op_end) | |
78 | { | |
79 | const gdb_byte * const base = op_ptr; | |
80 | int stack_depth; | |
81 | ||
82 | op_ptr += start; | |
c6bcad5f TT |
83 | gdb_assert ((*info)[start].visited); |
84 | stack_depth = (*info)[start].depth; | |
bb2ec1b3 TT |
85 | |
86 | while (op_ptr < op_end) | |
87 | { | |
aead7601 | 88 | enum dwarf_location_atom op = (enum dwarf_location_atom) *op_ptr; |
bb2ec1b3 TT |
89 | uint64_t reg; |
90 | int64_t offset; | |
91 | int ndx = op_ptr - base; | |
92 | ||
93 | #define SET_CHECK_DEPTH(WHERE) \ | |
c6bcad5f | 94 | if ((*info)[WHERE].visited) \ |
bb2ec1b3 | 95 | { \ |
c6bcad5f | 96 | if ((*info)[WHERE].depth != stack_depth) \ |
bb2ec1b3 TT |
97 | error (_("inconsistent stack depths")); \ |
98 | } \ | |
99 | else \ | |
100 | { \ | |
101 | /* Stack depth not set, so set it. */ \ | |
c6bcad5f TT |
102 | (*info)[WHERE].visited = 1; \ |
103 | (*info)[WHERE].depth = stack_depth; \ | |
bb2ec1b3 TT |
104 | } |
105 | ||
106 | SET_CHECK_DEPTH (ndx); | |
107 | ||
108 | ++op_ptr; | |
109 | ||
110 | switch (op) | |
111 | { | |
112 | case DW_OP_lit0: | |
113 | case DW_OP_lit1: | |
114 | case DW_OP_lit2: | |
115 | case DW_OP_lit3: | |
116 | case DW_OP_lit4: | |
117 | case DW_OP_lit5: | |
118 | case DW_OP_lit6: | |
119 | case DW_OP_lit7: | |
120 | case DW_OP_lit8: | |
121 | case DW_OP_lit9: | |
122 | case DW_OP_lit10: | |
123 | case DW_OP_lit11: | |
124 | case DW_OP_lit12: | |
125 | case DW_OP_lit13: | |
126 | case DW_OP_lit14: | |
127 | case DW_OP_lit15: | |
128 | case DW_OP_lit16: | |
129 | case DW_OP_lit17: | |
130 | case DW_OP_lit18: | |
131 | case DW_OP_lit19: | |
132 | case DW_OP_lit20: | |
133 | case DW_OP_lit21: | |
134 | case DW_OP_lit22: | |
135 | case DW_OP_lit23: | |
136 | case DW_OP_lit24: | |
137 | case DW_OP_lit25: | |
138 | case DW_OP_lit26: | |
139 | case DW_OP_lit27: | |
140 | case DW_OP_lit28: | |
141 | case DW_OP_lit29: | |
142 | case DW_OP_lit30: | |
143 | case DW_OP_lit31: | |
144 | ++stack_depth; | |
145 | break; | |
146 | ||
147 | case DW_OP_addr: | |
148 | op_ptr += addr_size; | |
149 | ++stack_depth; | |
150 | break; | |
151 | ||
152 | case DW_OP_const1u: | |
153 | case DW_OP_const1s: | |
154 | op_ptr += 1; | |
155 | ++stack_depth; | |
156 | break; | |
157 | case DW_OP_const2u: | |
158 | case DW_OP_const2s: | |
159 | op_ptr += 2; | |
160 | ++stack_depth; | |
161 | break; | |
162 | case DW_OP_const4u: | |
163 | case DW_OP_const4s: | |
164 | op_ptr += 4; | |
165 | ++stack_depth; | |
166 | break; | |
167 | case DW_OP_const8u: | |
168 | case DW_OP_const8s: | |
169 | op_ptr += 8; | |
170 | ++stack_depth; | |
171 | break; | |
172 | case DW_OP_constu: | |
173 | case DW_OP_consts: | |
174 | op_ptr = safe_read_sleb128 (op_ptr, op_end, &offset); | |
175 | ++stack_depth; | |
176 | break; | |
177 | ||
178 | case DW_OP_reg0: | |
179 | case DW_OP_reg1: | |
180 | case DW_OP_reg2: | |
181 | case DW_OP_reg3: | |
182 | case DW_OP_reg4: | |
183 | case DW_OP_reg5: | |
184 | case DW_OP_reg6: | |
185 | case DW_OP_reg7: | |
186 | case DW_OP_reg8: | |
187 | case DW_OP_reg9: | |
188 | case DW_OP_reg10: | |
189 | case DW_OP_reg11: | |
190 | case DW_OP_reg12: | |
191 | case DW_OP_reg13: | |
192 | case DW_OP_reg14: | |
193 | case DW_OP_reg15: | |
194 | case DW_OP_reg16: | |
195 | case DW_OP_reg17: | |
196 | case DW_OP_reg18: | |
197 | case DW_OP_reg19: | |
198 | case DW_OP_reg20: | |
199 | case DW_OP_reg21: | |
200 | case DW_OP_reg22: | |
201 | case DW_OP_reg23: | |
202 | case DW_OP_reg24: | |
203 | case DW_OP_reg25: | |
204 | case DW_OP_reg26: | |
205 | case DW_OP_reg27: | |
206 | case DW_OP_reg28: | |
207 | case DW_OP_reg29: | |
208 | case DW_OP_reg30: | |
209 | case DW_OP_reg31: | |
210 | ++stack_depth; | |
211 | break; | |
212 | ||
213 | case DW_OP_regx: | |
214 | op_ptr = safe_read_uleb128 (op_ptr, op_end, ®); | |
215 | ++stack_depth; | |
216 | break; | |
217 | ||
218 | case DW_OP_breg0: | |
219 | case DW_OP_breg1: | |
220 | case DW_OP_breg2: | |
221 | case DW_OP_breg3: | |
222 | case DW_OP_breg4: | |
223 | case DW_OP_breg5: | |
224 | case DW_OP_breg6: | |
225 | case DW_OP_breg7: | |
226 | case DW_OP_breg8: | |
227 | case DW_OP_breg9: | |
228 | case DW_OP_breg10: | |
229 | case DW_OP_breg11: | |
230 | case DW_OP_breg12: | |
231 | case DW_OP_breg13: | |
232 | case DW_OP_breg14: | |
233 | case DW_OP_breg15: | |
234 | case DW_OP_breg16: | |
235 | case DW_OP_breg17: | |
236 | case DW_OP_breg18: | |
237 | case DW_OP_breg19: | |
238 | case DW_OP_breg20: | |
239 | case DW_OP_breg21: | |
240 | case DW_OP_breg22: | |
241 | case DW_OP_breg23: | |
242 | case DW_OP_breg24: | |
243 | case DW_OP_breg25: | |
244 | case DW_OP_breg26: | |
245 | case DW_OP_breg27: | |
246 | case DW_OP_breg28: | |
247 | case DW_OP_breg29: | |
248 | case DW_OP_breg30: | |
249 | case DW_OP_breg31: | |
250 | op_ptr = safe_read_sleb128 (op_ptr, op_end, &offset); | |
251 | ++stack_depth; | |
252 | break; | |
253 | case DW_OP_bregx: | |
254 | { | |
255 | op_ptr = safe_read_uleb128 (op_ptr, op_end, ®); | |
256 | op_ptr = safe_read_sleb128 (op_ptr, op_end, &offset); | |
257 | ++stack_depth; | |
258 | } | |
259 | break; | |
260 | case DW_OP_fbreg: | |
261 | op_ptr = safe_read_sleb128 (op_ptr, op_end, &offset); | |
262 | ++stack_depth; | |
263 | break; | |
264 | ||
265 | case DW_OP_dup: | |
266 | ++stack_depth; | |
267 | break; | |
268 | ||
269 | case DW_OP_drop: | |
270 | --stack_depth; | |
271 | break; | |
272 | ||
273 | case DW_OP_pick: | |
274 | ++op_ptr; | |
275 | ++stack_depth; | |
276 | break; | |
277 | ||
278 | case DW_OP_rot: | |
279 | case DW_OP_swap: | |
280 | *need_tempvar = 1; | |
281 | break; | |
282 | ||
283 | case DW_OP_over: | |
284 | ++stack_depth; | |
285 | break; | |
286 | ||
287 | case DW_OP_abs: | |
288 | case DW_OP_neg: | |
289 | case DW_OP_not: | |
290 | case DW_OP_deref: | |
291 | break; | |
292 | ||
293 | case DW_OP_deref_size: | |
294 | ++op_ptr; | |
295 | break; | |
296 | ||
297 | case DW_OP_plus_uconst: | |
298 | op_ptr = safe_read_uleb128 (op_ptr, op_end, ®); | |
299 | break; | |
300 | ||
301 | case DW_OP_div: | |
302 | case DW_OP_shra: | |
303 | case DW_OP_and: | |
304 | case DW_OP_minus: | |
305 | case DW_OP_mod: | |
306 | case DW_OP_mul: | |
307 | case DW_OP_or: | |
308 | case DW_OP_plus: | |
309 | case DW_OP_shl: | |
310 | case DW_OP_shr: | |
311 | case DW_OP_xor: | |
312 | case DW_OP_le: | |
313 | case DW_OP_ge: | |
314 | case DW_OP_eq: | |
315 | case DW_OP_lt: | |
316 | case DW_OP_gt: | |
317 | case DW_OP_ne: | |
318 | --stack_depth; | |
319 | break; | |
320 | ||
321 | case DW_OP_call_frame_cfa: | |
322 | ++stack_depth; | |
323 | break; | |
324 | ||
325 | case DW_OP_GNU_push_tls_address: | |
4aa4e28b | 326 | case DW_OP_form_tls_address: |
c6bcad5f | 327 | (*info)[ndx].is_tls = 1; |
bb2ec1b3 TT |
328 | break; |
329 | ||
330 | case DW_OP_skip: | |
331 | offset = extract_signed_integer (op_ptr, 2, byte_order); | |
332 | op_ptr += 2; | |
333 | offset = op_ptr + offset - base; | |
334 | /* If the destination has not been seen yet, add it to the | |
335 | to-do list. */ | |
c6bcad5f | 336 | if (!(*info)[offset].visited) |
711799d5 | 337 | to_do->push_back (offset); |
bb2ec1b3 | 338 | SET_CHECK_DEPTH (offset); |
c6bcad5f | 339 | (*info)[offset].label = 1; |
bb2ec1b3 TT |
340 | /* We're done with this line of code. */ |
341 | return; | |
342 | ||
343 | case DW_OP_bra: | |
344 | offset = extract_signed_integer (op_ptr, 2, byte_order); | |
345 | op_ptr += 2; | |
346 | offset = op_ptr + offset - base; | |
347 | --stack_depth; | |
348 | /* If the destination has not been seen yet, add it to the | |
349 | to-do list. */ | |
c6bcad5f | 350 | if (!(*info)[offset].visited) |
711799d5 | 351 | to_do->push_back (offset); |
bb2ec1b3 | 352 | SET_CHECK_DEPTH (offset); |
c6bcad5f | 353 | (*info)[offset].label = 1; |
bb2ec1b3 TT |
354 | break; |
355 | ||
356 | case DW_OP_nop: | |
357 | break; | |
358 | ||
359 | default: | |
360 | error (_("unhandled DWARF op: %s"), get_DW_OP_name (op)); | |
361 | } | |
362 | } | |
363 | ||
364 | gdb_assert (op_ptr == op_end); | |
365 | ||
366 | #undef SET_CHECK_DEPTH | |
367 | } | |
368 | ||
369 | /* Compute the maximum needed stack depth of a DWARF expression, and | |
370 | some other information as well. | |
371 | ||
372 | BYTE_ORDER and ADDR_SIZE describe this bytecode in the obvious way. | |
373 | NEED_TEMPVAR is an out parameter which is set if this expression | |
374 | needs a special temporary variable to be emitted (see the code | |
375 | generator). | |
376 | IS_TLS is an out parameter which is set if this expression refers | |
377 | to a TLS variable. | |
378 | OP_PTR and OP_END are the bounds of the DWARF expression. | |
379 | INITIAL_DEPTH is the initial depth of the DWARF expression stack. | |
380 | INFO is an array of insn_info objects, indexed by offset from the | |
381 | start of the DWARF expression. | |
382 | ||
383 | This returns the maximum stack depth. */ | |
384 | ||
385 | static int | |
386 | compute_stack_depth (enum bfd_endian byte_order, unsigned int addr_size, | |
387 | int *need_tempvar, int *is_tls, | |
388 | const gdb_byte *op_ptr, const gdb_byte *op_end, | |
389 | int initial_depth, | |
c6bcad5f | 390 | std::vector<struct insn_info> *info) |
bb2ec1b3 | 391 | { |
711799d5 | 392 | std::vector<int> to_do; |
bb2ec1b3 TT |
393 | int stack_depth, i; |
394 | ||
c6bcad5f | 395 | info->resize (op_end - op_ptr); |
bb2ec1b3 | 396 | |
711799d5 | 397 | to_do.push_back (0); |
bb2ec1b3 TT |
398 | (*info)[0].depth = initial_depth; |
399 | (*info)[0].visited = 1; | |
400 | ||
711799d5 | 401 | while (!to_do.empty ()) |
bb2ec1b3 | 402 | { |
711799d5 TT |
403 | int ndx = to_do.back (); |
404 | to_do.pop_back (); | |
bb2ec1b3 | 405 | |
c6bcad5f | 406 | compute_stack_depth_worker (ndx, need_tempvar, info, &to_do, |
bb2ec1b3 TT |
407 | byte_order, addr_size, |
408 | op_ptr, op_end); | |
409 | } | |
410 | ||
411 | stack_depth = 0; | |
412 | *is_tls = 0; | |
413 | for (i = 0; i < op_end - op_ptr; ++i) | |
414 | { | |
415 | if ((*info)[i].depth > stack_depth) | |
416 | stack_depth = (*info)[i].depth; | |
417 | if ((*info)[i].is_tls) | |
418 | *is_tls = 1; | |
419 | } | |
420 | ||
bb2ec1b3 TT |
421 | return stack_depth + 1; |
422 | } | |
423 | ||
424 | \f | |
425 | ||
426 | #define GCC_UINTPTR "__gdb_uintptr" | |
427 | #define GCC_INTPTR "__gdb_intptr" | |
428 | ||
429 | /* Emit code to push a constant. */ | |
430 | ||
431 | static void | |
d7e74731 | 432 | push (int indent, string_file &stream, ULONGEST l) |
bb2ec1b3 | 433 | { |
d7e74731 | 434 | fprintfi_filtered (indent, &stream, |
3a9558c4 | 435 | "__gdb_stack[++__gdb_tos] = (" GCC_UINTPTR ") %s;\n", |
bb2ec1b3 TT |
436 | hex_string (l)); |
437 | } | |
438 | ||
439 | /* Emit code to push an arbitrary expression. This works like | |
440 | printf. */ | |
441 | ||
d7e74731 | 442 | static void pushf (int indent, string_file &stream, const char *format, ...) |
77b64a49 PA |
443 | ATTRIBUTE_PRINTF (3, 4); |
444 | ||
bb2ec1b3 | 445 | static void |
d7e74731 | 446 | pushf (int indent, string_file &stream, const char *format, ...) |
bb2ec1b3 TT |
447 | { |
448 | va_list args; | |
449 | ||
d7e74731 | 450 | fprintfi_filtered (indent, &stream, "__gdb_stack[__gdb_tos + 1] = "); |
bb2ec1b3 | 451 | va_start (args, format); |
d7e74731 | 452 | stream.vprintf (format, args); |
bb2ec1b3 | 453 | va_end (args); |
d7e74731 | 454 | stream.puts (";\n"); |
bb2ec1b3 | 455 | |
d7e74731 | 456 | fprintfi_filtered (indent, &stream, "++__gdb_tos;\n"); |
bb2ec1b3 TT |
457 | } |
458 | ||
459 | /* Emit code for a unary expression -- one which operates in-place on | |
460 | the top-of-stack. This works like printf. */ | |
461 | ||
d7e74731 | 462 | static void unary (int indent, string_file &stream, const char *format, ...) |
77b64a49 PA |
463 | ATTRIBUTE_PRINTF (3, 4); |
464 | ||
bb2ec1b3 | 465 | static void |
d7e74731 | 466 | unary (int indent, string_file &stream, const char *format, ...) |
bb2ec1b3 TT |
467 | { |
468 | va_list args; | |
469 | ||
d7e74731 | 470 | fprintfi_filtered (indent, &stream, "__gdb_stack[__gdb_tos] = "); |
bb2ec1b3 | 471 | va_start (args, format); |
d7e74731 | 472 | stream.vprintf (format, args); |
bb2ec1b3 | 473 | va_end (args); |
d7e74731 | 474 | stream.puts (";\n"); |
bb2ec1b3 TT |
475 | } |
476 | ||
477 | /* Emit code for a unary expression -- one which uses the top two | |
478 | stack items, popping the topmost one. This works like printf. */ | |
d7e74731 | 479 | static void binary (int indent, string_file &stream, const char *format, ...) |
77b64a49 | 480 | ATTRIBUTE_PRINTF (3, 4); |
bb2ec1b3 TT |
481 | |
482 | static void | |
d7e74731 | 483 | binary (int indent, string_file &stream, const char *format, ...) |
bb2ec1b3 TT |
484 | { |
485 | va_list args; | |
486 | ||
d7e74731 | 487 | fprintfi_filtered (indent, &stream, "__gdb_stack[__gdb_tos - 1] = "); |
bb2ec1b3 | 488 | va_start (args, format); |
d7e74731 | 489 | stream.vprintf (format, args); |
bb2ec1b3 | 490 | va_end (args); |
d7e74731 PA |
491 | stream.puts (";\n"); |
492 | fprintfi_filtered (indent, &stream, "--__gdb_tos;\n"); | |
bb2ec1b3 TT |
493 | } |
494 | ||
495 | /* Print the name of a label given its "SCOPE", an arbitrary integer | |
496 | used for uniqueness, and its TARGET, the bytecode offset | |
497 | corresponding to the label's point of definition. */ | |
498 | ||
499 | static void | |
d7e74731 | 500 | print_label (string_file &stream, unsigned int scope, int target) |
bb2ec1b3 | 501 | { |
d7e74731 | 502 | stream.printf ("__label_%u_%s", scope, pulongest (target)); |
bb2ec1b3 TT |
503 | } |
504 | ||
505 | /* Emit code that pushes a register's address on the stack. | |
506 | REGISTERS_USED is an out parameter which is updated to note which | |
507 | register was needed by this expression. */ | |
508 | ||
509 | static void | |
d7e74731 | 510 | pushf_register_address (int indent, string_file &stream, |
bb2ec1b3 TT |
511 | unsigned char *registers_used, |
512 | struct gdbarch *gdbarch, int regnum) | |
513 | { | |
8f84fb0e | 514 | std::string regname = compile_register_name_mangled (gdbarch, regnum); |
bb2ec1b3 TT |
515 | |
516 | registers_used[regnum] = 1; | |
3a9558c4 JK |
517 | pushf (indent, stream, |
518 | "(" GCC_UINTPTR ") &" COMPILE_I_SIMPLE_REGISTER_ARG_NAME "->%s", | |
8f84fb0e | 519 | regname.c_str ()); |
bb2ec1b3 TT |
520 | } |
521 | ||
522 | /* Emit code that pushes a register's value on the stack. | |
523 | REGISTERS_USED is an out parameter which is updated to note which | |
524 | register was needed by this expression. OFFSET is added to the | |
525 | register's value before it is pushed. */ | |
526 | ||
527 | static void | |
d7e74731 | 528 | pushf_register (int indent, string_file &stream, |
bb2ec1b3 TT |
529 | unsigned char *registers_used, |
530 | struct gdbarch *gdbarch, int regnum, uint64_t offset) | |
531 | { | |
8f84fb0e | 532 | std::string regname = compile_register_name_mangled (gdbarch, regnum); |
bb2ec1b3 TT |
533 | |
534 | registers_used[regnum] = 1; | |
535 | if (offset == 0) | |
536 | pushf (indent, stream, COMPILE_I_SIMPLE_REGISTER_ARG_NAME "->%s", | |
8f84fb0e | 537 | regname.c_str ()); |
bb2ec1b3 | 538 | else |
3a9558c4 JK |
539 | pushf (indent, stream, |
540 | COMPILE_I_SIMPLE_REGISTER_ARG_NAME "->%s + (" GCC_UINTPTR ") %s", | |
8f84fb0e | 541 | regname.c_str (), hex_string (offset)); |
bb2ec1b3 TT |
542 | } |
543 | ||
544 | /* Compile a DWARF expression to C code. | |
545 | ||
546 | INDENT is the indentation level to use. | |
547 | STREAM is the stream where the code should be written. | |
548 | ||
549 | TYPE_NAME names the type of the result of the DWARF expression. | |
550 | For locations this is "void *" but for array bounds it will be an | |
551 | integer type. | |
552 | ||
553 | RESULT_NAME is the name of a variable in the resulting C code. The | |
554 | result of the expression will be assigned to this variable. | |
555 | ||
556 | SYM is the symbol corresponding to this expression. | |
557 | PC is the location at which the expression is being evaluated. | |
558 | ARCH is the architecture to use. | |
559 | ||
560 | REGISTERS_USED is an out parameter which is updated to note which | |
561 | registers were needed by this expression. | |
562 | ||
563 | ADDR_SIZE is the DWARF address size to use. | |
564 | ||
565 | OPT_PTR and OP_END are the bounds of the DWARF expression. | |
566 | ||
567 | If non-NULL, INITIAL points to an initial value to write to the | |
568 | stack. If NULL, no initial value is written. | |
569 | ||
570 | PER_CU is the per-CU object used for looking up various other | |
571 | things. */ | |
572 | ||
573 | static void | |
d7e74731 | 574 | do_compile_dwarf_expr_to_c (int indent, string_file &stream, |
bb2ec1b3 TT |
575 | const char *type_name, |
576 | const char *result_name, | |
577 | struct symbol *sym, CORE_ADDR pc, | |
578 | struct gdbarch *arch, | |
579 | unsigned char *registers_used, | |
580 | unsigned int addr_size, | |
581 | const gdb_byte *op_ptr, const gdb_byte *op_end, | |
582 | CORE_ADDR *initial, | |
583 | struct dwarf2_per_cu_data *per_cu) | |
584 | { | |
585 | /* We keep a counter so that labels and other objects we create have | |
586 | unique names. */ | |
587 | static unsigned int scope; | |
588 | ||
589 | enum bfd_endian byte_order = gdbarch_byte_order (arch); | |
590 | const gdb_byte * const base = op_ptr; | |
591 | int need_tempvar = 0; | |
592 | int is_tls = 0; | |
c6bcad5f | 593 | std::vector<struct insn_info> info; |
bb2ec1b3 TT |
594 | int stack_depth; |
595 | ||
596 | ++scope; | |
597 | ||
d7e74731 | 598 | fprintfi_filtered (indent, &stream, "__attribute__ ((unused)) %s %s;\n", |
3a9558c4 | 599 | type_name, result_name); |
d7e74731 | 600 | fprintfi_filtered (indent, &stream, "{\n"); |
bb2ec1b3 TT |
601 | indent += 2; |
602 | ||
603 | stack_depth = compute_stack_depth (byte_order, addr_size, | |
604 | &need_tempvar, &is_tls, | |
605 | op_ptr, op_end, initial != NULL, | |
606 | &info); | |
bb2ec1b3 TT |
607 | |
608 | /* This is a hack until we can add a feature to glibc to let us | |
609 | properly generate code for TLS. You might think we could emit | |
610 | the address in the ordinary course of translating | |
611 | DW_OP_GNU_push_tls_address, but since the operand appears on the | |
612 | stack, it is relatively hard to find, and the idea of calling | |
613 | target_translate_tls_address with OFFSET==0 and then adding the | |
614 | offset by hand seemed too hackish. */ | |
615 | if (is_tls) | |
616 | { | |
617 | struct frame_info *frame = get_selected_frame (NULL); | |
618 | struct value *val; | |
619 | ||
620 | if (frame == NULL) | |
621 | error (_("Symbol \"%s\" cannot be used because " | |
622 | "there is no selected frame"), | |
623 | SYMBOL_PRINT_NAME (sym)); | |
624 | ||
63e43d3a | 625 | val = read_var_value (sym, NULL, frame); |
bb2ec1b3 TT |
626 | if (VALUE_LVAL (val) != lval_memory) |
627 | error (_("Symbol \"%s\" cannot be used for compilation evaluation " | |
628 | "as its address has not been found."), | |
629 | SYMBOL_PRINT_NAME (sym)); | |
630 | ||
631 | warning (_("Symbol \"%s\" is thread-local and currently can only " | |
632 | "be referenced from the current thread in " | |
633 | "compiled code."), | |
634 | SYMBOL_PRINT_NAME (sym)); | |
635 | ||
d7e74731 | 636 | fprintfi_filtered (indent, &stream, "%s = %s;\n", |
bb2ec1b3 TT |
637 | result_name, |
638 | core_addr_to_string (value_address (val))); | |
d7e74731 | 639 | fprintfi_filtered (indent - 2, &stream, "}\n"); |
bb2ec1b3 TT |
640 | return; |
641 | } | |
642 | ||
d7e74731 | 643 | fprintfi_filtered (indent, &stream, GCC_UINTPTR " __gdb_stack[%d];\n", |
bb2ec1b3 TT |
644 | stack_depth); |
645 | ||
646 | if (need_tempvar) | |
d7e74731 PA |
647 | fprintfi_filtered (indent, &stream, GCC_UINTPTR " __gdb_tmp;\n"); |
648 | fprintfi_filtered (indent, &stream, "int __gdb_tos = -1;\n"); | |
bb2ec1b3 TT |
649 | |
650 | if (initial != NULL) | |
77b64a49 | 651 | pushf (indent, stream, "%s", core_addr_to_string (*initial)); |
bb2ec1b3 TT |
652 | |
653 | while (op_ptr < op_end) | |
654 | { | |
aead7601 | 655 | enum dwarf_location_atom op = (enum dwarf_location_atom) *op_ptr; |
bb2ec1b3 TT |
656 | uint64_t uoffset, reg; |
657 | int64_t offset; | |
658 | ||
d7e74731 | 659 | print_spaces (indent - 2, &stream); |
bb2ec1b3 TT |
660 | if (info[op_ptr - base].label) |
661 | { | |
662 | print_label (stream, scope, op_ptr - base); | |
d7e74731 | 663 | stream.puts (":;"); |
bb2ec1b3 | 664 | } |
d7e74731 | 665 | stream.printf ("/* %s */\n", get_DW_OP_name (op)); |
bb2ec1b3 TT |
666 | |
667 | /* This is handy for debugging the generated code: | |
668 | fprintf_filtered (stream, "if (__gdb_tos != %d) abort ();\n", | |
669 | (int) info[op_ptr - base].depth - 1); | |
670 | */ | |
671 | ||
672 | ++op_ptr; | |
673 | ||
674 | switch (op) | |
675 | { | |
676 | case DW_OP_lit0: | |
677 | case DW_OP_lit1: | |
678 | case DW_OP_lit2: | |
679 | case DW_OP_lit3: | |
680 | case DW_OP_lit4: | |
681 | case DW_OP_lit5: | |
682 | case DW_OP_lit6: | |
683 | case DW_OP_lit7: | |
684 | case DW_OP_lit8: | |
685 | case DW_OP_lit9: | |
686 | case DW_OP_lit10: | |
687 | case DW_OP_lit11: | |
688 | case DW_OP_lit12: | |
689 | case DW_OP_lit13: | |
690 | case DW_OP_lit14: | |
691 | case DW_OP_lit15: | |
692 | case DW_OP_lit16: | |
693 | case DW_OP_lit17: | |
694 | case DW_OP_lit18: | |
695 | case DW_OP_lit19: | |
696 | case DW_OP_lit20: | |
697 | case DW_OP_lit21: | |
698 | case DW_OP_lit22: | |
699 | case DW_OP_lit23: | |
700 | case DW_OP_lit24: | |
701 | case DW_OP_lit25: | |
702 | case DW_OP_lit26: | |
703 | case DW_OP_lit27: | |
704 | case DW_OP_lit28: | |
705 | case DW_OP_lit29: | |
706 | case DW_OP_lit30: | |
707 | case DW_OP_lit31: | |
708 | push (indent, stream, op - DW_OP_lit0); | |
709 | break; | |
710 | ||
711 | case DW_OP_addr: | |
266934d1 | 712 | uoffset = extract_unsigned_integer (op_ptr, addr_size, byte_order); |
bb2ec1b3 TT |
713 | op_ptr += addr_size; |
714 | /* Some versions of GCC emit DW_OP_addr before | |
715 | DW_OP_GNU_push_tls_address. In this case the value is an | |
716 | index, not an address. We don't support things like | |
717 | branching between the address and the TLS op. */ | |
718 | if (op_ptr >= op_end || *op_ptr != DW_OP_GNU_push_tls_address) | |
719 | uoffset += dwarf2_per_cu_text_offset (per_cu); | |
720 | push (indent, stream, uoffset); | |
721 | break; | |
722 | ||
723 | case DW_OP_const1u: | |
724 | push (indent, stream, | |
725 | extract_unsigned_integer (op_ptr, 1, byte_order)); | |
726 | op_ptr += 1; | |
727 | break; | |
728 | case DW_OP_const1s: | |
729 | push (indent, stream, | |
730 | extract_signed_integer (op_ptr, 1, byte_order)); | |
731 | op_ptr += 1; | |
732 | break; | |
733 | case DW_OP_const2u: | |
734 | push (indent, stream, | |
735 | extract_unsigned_integer (op_ptr, 2, byte_order)); | |
736 | op_ptr += 2; | |
737 | break; | |
738 | case DW_OP_const2s: | |
739 | push (indent, stream, | |
740 | extract_signed_integer (op_ptr, 2, byte_order)); | |
741 | op_ptr += 2; | |
742 | break; | |
743 | case DW_OP_const4u: | |
744 | push (indent, stream, | |
745 | extract_unsigned_integer (op_ptr, 4, byte_order)); | |
746 | op_ptr += 4; | |
747 | break; | |
748 | case DW_OP_const4s: | |
749 | push (indent, stream, | |
750 | extract_signed_integer (op_ptr, 4, byte_order)); | |
751 | op_ptr += 4; | |
752 | break; | |
753 | case DW_OP_const8u: | |
754 | push (indent, stream, | |
755 | extract_unsigned_integer (op_ptr, 8, byte_order)); | |
756 | op_ptr += 8; | |
757 | break; | |
758 | case DW_OP_const8s: | |
759 | push (indent, stream, | |
760 | extract_signed_integer (op_ptr, 8, byte_order)); | |
761 | op_ptr += 8; | |
762 | break; | |
763 | case DW_OP_constu: | |
764 | op_ptr = safe_read_uleb128 (op_ptr, op_end, &uoffset); | |
765 | push (indent, stream, uoffset); | |
766 | break; | |
767 | case DW_OP_consts: | |
768 | op_ptr = safe_read_sleb128 (op_ptr, op_end, &offset); | |
769 | push (indent, stream, offset); | |
770 | break; | |
771 | ||
772 | case DW_OP_reg0: | |
773 | case DW_OP_reg1: | |
774 | case DW_OP_reg2: | |
775 | case DW_OP_reg3: | |
776 | case DW_OP_reg4: | |
777 | case DW_OP_reg5: | |
778 | case DW_OP_reg6: | |
779 | case DW_OP_reg7: | |
780 | case DW_OP_reg8: | |
781 | case DW_OP_reg9: | |
782 | case DW_OP_reg10: | |
783 | case DW_OP_reg11: | |
784 | case DW_OP_reg12: | |
785 | case DW_OP_reg13: | |
786 | case DW_OP_reg14: | |
787 | case DW_OP_reg15: | |
788 | case DW_OP_reg16: | |
789 | case DW_OP_reg17: | |
790 | case DW_OP_reg18: | |
791 | case DW_OP_reg19: | |
792 | case DW_OP_reg20: | |
793 | case DW_OP_reg21: | |
794 | case DW_OP_reg22: | |
795 | case DW_OP_reg23: | |
796 | case DW_OP_reg24: | |
797 | case DW_OP_reg25: | |
798 | case DW_OP_reg26: | |
799 | case DW_OP_reg27: | |
800 | case DW_OP_reg28: | |
801 | case DW_OP_reg29: | |
802 | case DW_OP_reg30: | |
803 | case DW_OP_reg31: | |
804 | dwarf_expr_require_composition (op_ptr, op_end, "DW_OP_regx"); | |
805 | pushf_register_address (indent, stream, registers_used, arch, | |
0fde2c53 DE |
806 | dwarf_reg_to_regnum_or_error |
807 | (arch, op - DW_OP_reg0)); | |
bb2ec1b3 TT |
808 | break; |
809 | ||
810 | case DW_OP_regx: | |
811 | op_ptr = safe_read_uleb128 (op_ptr, op_end, ®); | |
812 | dwarf_expr_require_composition (op_ptr, op_end, "DW_OP_regx"); | |
813 | pushf_register_address (indent, stream, registers_used, arch, | |
0fde2c53 | 814 | dwarf_reg_to_regnum_or_error (arch, reg)); |
bb2ec1b3 TT |
815 | break; |
816 | ||
817 | case DW_OP_breg0: | |
818 | case DW_OP_breg1: | |
819 | case DW_OP_breg2: | |
820 | case DW_OP_breg3: | |
821 | case DW_OP_breg4: | |
822 | case DW_OP_breg5: | |
823 | case DW_OP_breg6: | |
824 | case DW_OP_breg7: | |
825 | case DW_OP_breg8: | |
826 | case DW_OP_breg9: | |
827 | case DW_OP_breg10: | |
828 | case DW_OP_breg11: | |
829 | case DW_OP_breg12: | |
830 | case DW_OP_breg13: | |
831 | case DW_OP_breg14: | |
832 | case DW_OP_breg15: | |
833 | case DW_OP_breg16: | |
834 | case DW_OP_breg17: | |
835 | case DW_OP_breg18: | |
836 | case DW_OP_breg19: | |
837 | case DW_OP_breg20: | |
838 | case DW_OP_breg21: | |
839 | case DW_OP_breg22: | |
840 | case DW_OP_breg23: | |
841 | case DW_OP_breg24: | |
842 | case DW_OP_breg25: | |
843 | case DW_OP_breg26: | |
844 | case DW_OP_breg27: | |
845 | case DW_OP_breg28: | |
846 | case DW_OP_breg29: | |
847 | case DW_OP_breg30: | |
848 | case DW_OP_breg31: | |
849 | op_ptr = safe_read_sleb128 (op_ptr, op_end, &offset); | |
850 | pushf_register (indent, stream, registers_used, arch, | |
0fde2c53 DE |
851 | dwarf_reg_to_regnum_or_error (arch, |
852 | op - DW_OP_breg0), | |
bb2ec1b3 TT |
853 | offset); |
854 | break; | |
855 | case DW_OP_bregx: | |
856 | { | |
857 | op_ptr = safe_read_uleb128 (op_ptr, op_end, ®); | |
858 | op_ptr = safe_read_sleb128 (op_ptr, op_end, &offset); | |
859 | pushf_register (indent, stream, registers_used, arch, | |
0fde2c53 | 860 | dwarf_reg_to_regnum_or_error (arch, reg), offset); |
bb2ec1b3 TT |
861 | } |
862 | break; | |
863 | case DW_OP_fbreg: | |
864 | { | |
865 | const gdb_byte *datastart; | |
866 | size_t datalen; | |
867 | const struct block *b; | |
868 | struct symbol *framefunc; | |
869 | char fb_name[50]; | |
870 | ||
871 | b = block_for_pc (pc); | |
872 | ||
873 | if (!b) | |
874 | error (_("No block found for address")); | |
875 | ||
876 | framefunc = block_linkage_function (b); | |
877 | ||
878 | if (!framefunc) | |
879 | error (_("No function found for block")); | |
880 | ||
881 | func_get_frame_base_dwarf_block (framefunc, pc, | |
882 | &datastart, &datalen); | |
883 | ||
884 | op_ptr = safe_read_sleb128 (op_ptr, op_end, &offset); | |
885 | ||
886 | /* Generate a unique-enough name, in case the frame base | |
887 | is computed multiple times in this expression. */ | |
888 | xsnprintf (fb_name, sizeof (fb_name), "__frame_base_%ld", | |
889 | (long) (op_ptr - base)); | |
890 | ||
891 | do_compile_dwarf_expr_to_c (indent, stream, | |
3a9558c4 | 892 | GCC_UINTPTR, fb_name, |
bb2ec1b3 TT |
893 | sym, pc, |
894 | arch, registers_used, addr_size, | |
895 | datastart, datastart + datalen, | |
896 | NULL, per_cu); | |
897 | ||
898 | pushf (indent, stream, "%s + %s", fb_name, hex_string (offset)); | |
899 | } | |
900 | break; | |
901 | ||
902 | case DW_OP_dup: | |
903 | pushf (indent, stream, "__gdb_stack[__gdb_tos]"); | |
904 | break; | |
905 | ||
906 | case DW_OP_drop: | |
d7e74731 | 907 | fprintfi_filtered (indent, &stream, "--__gdb_tos;\n"); |
bb2ec1b3 TT |
908 | break; |
909 | ||
910 | case DW_OP_pick: | |
911 | offset = *op_ptr++; | |
77b64a49 PA |
912 | pushf (indent, stream, "__gdb_stack[__gdb_tos - %s]", |
913 | plongest (offset)); | |
bb2ec1b3 TT |
914 | break; |
915 | ||
916 | case DW_OP_swap: | |
d7e74731 | 917 | fprintfi_filtered (indent, &stream, |
bb2ec1b3 | 918 | "__gdb_tmp = __gdb_stack[__gdb_tos - 1];\n"); |
d7e74731 | 919 | fprintfi_filtered (indent, &stream, |
bb2ec1b3 TT |
920 | "__gdb_stack[__gdb_tos - 1] = " |
921 | "__gdb_stack[__gdb_tos];\n"); | |
d7e74731 PA |
922 | fprintfi_filtered (indent, &stream, ("__gdb_stack[__gdb_tos] = " |
923 | "__gdb_tmp;\n")); | |
bb2ec1b3 TT |
924 | break; |
925 | ||
926 | case DW_OP_over: | |
927 | pushf (indent, stream, "__gdb_stack[__gdb_tos - 1]"); | |
928 | break; | |
929 | ||
930 | case DW_OP_rot: | |
d7e74731 PA |
931 | fprintfi_filtered (indent, &stream, ("__gdb_tmp = " |
932 | "__gdb_stack[__gdb_tos];\n")); | |
933 | fprintfi_filtered (indent, &stream, | |
bb2ec1b3 TT |
934 | "__gdb_stack[__gdb_tos] = " |
935 | "__gdb_stack[__gdb_tos - 1];\n"); | |
d7e74731 | 936 | fprintfi_filtered (indent, &stream, |
bb2ec1b3 TT |
937 | "__gdb_stack[__gdb_tos - 1] = " |
938 | "__gdb_stack[__gdb_tos -2];\n"); | |
d7e74731 | 939 | fprintfi_filtered (indent, &stream, "__gdb_stack[__gdb_tos - 2] = " |
bb2ec1b3 TT |
940 | "__gdb_tmp;\n"); |
941 | break; | |
942 | ||
943 | case DW_OP_deref: | |
944 | case DW_OP_deref_size: | |
945 | { | |
946 | int size; | |
947 | const char *mode; | |
948 | ||
949 | if (op == DW_OP_deref_size) | |
950 | size = *op_ptr++; | |
951 | else | |
952 | size = addr_size; | |
953 | ||
954 | mode = c_get_mode_for_size (size); | |
955 | if (mode == NULL) | |
956 | error (_("Unsupported size %d in %s"), | |
957 | size, get_DW_OP_name (op)); | |
958 | ||
959 | /* Cast to a pointer of the desired type, then | |
960 | dereference. */ | |
d7e74731 | 961 | fprintfi_filtered (indent, &stream, |
bb2ec1b3 TT |
962 | "__gdb_stack[__gdb_tos] = " |
963 | "*((__gdb_int_%s *) " | |
964 | "__gdb_stack[__gdb_tos]);\n", | |
965 | mode); | |
966 | } | |
967 | break; | |
968 | ||
969 | case DW_OP_abs: | |
970 | unary (indent, stream, | |
971 | "((" GCC_INTPTR ") __gdb_stack[__gdb_tos]) < 0 ? " | |
972 | "-__gdb_stack[__gdb_tos] : __gdb_stack[__gdb_tos]"); | |
973 | break; | |
974 | ||
975 | case DW_OP_neg: | |
976 | unary (indent, stream, "-__gdb_stack[__gdb_tos]"); | |
977 | break; | |
978 | ||
979 | case DW_OP_not: | |
980 | unary (indent, stream, "~__gdb_stack[__gdb_tos]"); | |
981 | break; | |
982 | ||
983 | case DW_OP_plus_uconst: | |
984 | op_ptr = safe_read_uleb128 (op_ptr, op_end, ®); | |
985 | unary (indent, stream, "__gdb_stack[__gdb_tos] + %s", | |
986 | hex_string (reg)); | |
987 | break; | |
988 | ||
989 | case DW_OP_div: | |
990 | binary (indent, stream, ("((" GCC_INTPTR | |
991 | ") __gdb_stack[__gdb_tos-1]) / ((" | |
992 | GCC_INTPTR ") __gdb_stack[__gdb_tos])")); | |
993 | break; | |
994 | ||
995 | case DW_OP_shra: | |
996 | binary (indent, stream, | |
997 | "((" GCC_INTPTR ") __gdb_stack[__gdb_tos-1]) >> " | |
998 | "__gdb_stack[__gdb_tos]"); | |
999 | break; | |
1000 | ||
1001 | #define BINARY(OP) \ | |
77b64a49 PA |
1002 | binary (indent, stream, "%s", "__gdb_stack[__gdb_tos-1] " #OP \ |
1003 | " __gdb_stack[__gdb_tos]"); \ | |
bb2ec1b3 TT |
1004 | break |
1005 | ||
1006 | case DW_OP_and: | |
1007 | BINARY (&); | |
1008 | case DW_OP_minus: | |
1009 | BINARY (-); | |
1010 | case DW_OP_mod: | |
1011 | BINARY (%); | |
1012 | case DW_OP_mul: | |
1013 | BINARY (*); | |
1014 | case DW_OP_or: | |
1015 | BINARY (|); | |
1016 | case DW_OP_plus: | |
1017 | BINARY (+); | |
1018 | case DW_OP_shl: | |
1019 | BINARY (<<); | |
1020 | case DW_OP_shr: | |
1021 | BINARY (>>); | |
1022 | case DW_OP_xor: | |
1023 | BINARY (^); | |
1024 | #undef BINARY | |
1025 | ||
1026 | #define COMPARE(OP) \ | |
1027 | binary (indent, stream, \ | |
1028 | "(((" GCC_INTPTR ") __gdb_stack[__gdb_tos-1]) " #OP \ | |
1029 | " ((" GCC_INTPTR \ | |
1030 | ") __gdb_stack[__gdb_tos]))"); \ | |
1031 | break | |
1032 | ||
1033 | case DW_OP_le: | |
1034 | COMPARE (<=); | |
1035 | case DW_OP_ge: | |
1036 | COMPARE (>=); | |
1037 | case DW_OP_eq: | |
1038 | COMPARE (==); | |
1039 | case DW_OP_lt: | |
1040 | COMPARE (<); | |
1041 | case DW_OP_gt: | |
1042 | COMPARE (>); | |
1043 | case DW_OP_ne: | |
1044 | COMPARE (!=); | |
1045 | #undef COMPARE | |
1046 | ||
1047 | case DW_OP_call_frame_cfa: | |
1048 | { | |
1049 | int regnum; | |
1050 | CORE_ADDR text_offset; | |
1051 | LONGEST off; | |
1052 | const gdb_byte *cfa_start, *cfa_end; | |
1053 | ||
1054 | if (dwarf2_fetch_cfa_info (arch, pc, per_cu, | |
1055 | ®num, &off, | |
1056 | &text_offset, &cfa_start, &cfa_end)) | |
1057 | { | |
1058 | /* Register. */ | |
1059 | pushf_register (indent, stream, registers_used, arch, regnum, | |
1060 | off); | |
1061 | } | |
1062 | else | |
1063 | { | |
1064 | /* Another expression. */ | |
1065 | char cfa_name[50]; | |
1066 | ||
1067 | /* Generate a unique-enough name, in case the CFA is | |
1068 | computed multiple times in this expression. */ | |
1069 | xsnprintf (cfa_name, sizeof (cfa_name), | |
1070 | "__cfa_%ld", (long) (op_ptr - base)); | |
1071 | ||
1072 | do_compile_dwarf_expr_to_c (indent, stream, | |
3a9558c4 | 1073 | GCC_UINTPTR, cfa_name, |
bb2ec1b3 TT |
1074 | sym, pc, arch, registers_used, |
1075 | addr_size, | |
1076 | cfa_start, cfa_end, | |
1077 | &text_offset, per_cu); | |
77b64a49 | 1078 | pushf (indent, stream, "%s", cfa_name); |
bb2ec1b3 TT |
1079 | } |
1080 | } | |
1081 | ||
1082 | break; | |
1083 | ||
1084 | case DW_OP_skip: | |
1085 | offset = extract_signed_integer (op_ptr, 2, byte_order); | |
1086 | op_ptr += 2; | |
d7e74731 | 1087 | fprintfi_filtered (indent, &stream, "goto "); |
bb2ec1b3 | 1088 | print_label (stream, scope, op_ptr + offset - base); |
d7e74731 | 1089 | stream.puts (";\n"); |
bb2ec1b3 TT |
1090 | break; |
1091 | ||
1092 | case DW_OP_bra: | |
1093 | offset = extract_signed_integer (op_ptr, 2, byte_order); | |
1094 | op_ptr += 2; | |
d7e74731 | 1095 | fprintfi_filtered (indent, &stream, |
bb2ec1b3 TT |
1096 | "if ((( " GCC_INTPTR |
1097 | ") __gdb_stack[__gdb_tos--]) != 0) goto "); | |
1098 | print_label (stream, scope, op_ptr + offset - base); | |
d7e74731 | 1099 | stream.puts (";\n"); |
bb2ec1b3 TT |
1100 | break; |
1101 | ||
1102 | case DW_OP_nop: | |
1103 | break; | |
1104 | ||
1105 | default: | |
1106 | error (_("unhandled DWARF op: %s"), get_DW_OP_name (op)); | |
1107 | } | |
1108 | } | |
1109 | ||
d7e74731 | 1110 | fprintfi_filtered (indent, &stream, "%s = __gdb_stack[__gdb_tos];\n", |
3a9558c4 | 1111 | result_name); |
d7e74731 | 1112 | fprintfi_filtered (indent - 2, &stream, "}\n"); |
bb2ec1b3 TT |
1113 | } |
1114 | ||
1115 | /* See compile.h. */ | |
1116 | ||
1117 | void | |
d7e74731 | 1118 | compile_dwarf_expr_to_c (string_file &stream, const char *result_name, |
bb2ec1b3 TT |
1119 | struct symbol *sym, CORE_ADDR pc, |
1120 | struct gdbarch *arch, unsigned char *registers_used, | |
1121 | unsigned int addr_size, | |
1122 | const gdb_byte *op_ptr, const gdb_byte *op_end, | |
1123 | struct dwarf2_per_cu_data *per_cu) | |
1124 | { | |
3a9558c4 | 1125 | do_compile_dwarf_expr_to_c (2, stream, GCC_UINTPTR, result_name, sym, pc, |
bb2ec1b3 TT |
1126 | arch, registers_used, addr_size, op_ptr, op_end, |
1127 | NULL, per_cu); | |
1128 | } | |
1129 | ||
1130 | /* See compile.h. */ | |
1131 | ||
1132 | void | |
d7e74731 | 1133 | compile_dwarf_bounds_to_c (string_file &stream, |
bb2ec1b3 TT |
1134 | const char *result_name, |
1135 | const struct dynamic_prop *prop, | |
1136 | struct symbol *sym, CORE_ADDR pc, | |
1137 | struct gdbarch *arch, unsigned char *registers_used, | |
1138 | unsigned int addr_size, | |
1139 | const gdb_byte *op_ptr, const gdb_byte *op_end, | |
1140 | struct dwarf2_per_cu_data *per_cu) | |
1141 | { | |
1142 | do_compile_dwarf_expr_to_c (2, stream, "unsigned long ", result_name, | |
1143 | sym, pc, arch, registers_used, | |
1144 | addr_size, op_ptr, op_end, NULL, per_cu); | |
1145 | } |