Commit | Line | Data |
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852483bc MK |
1 | /* DWARF 2 Expression Evaluator. |
2 | ||
618f726f | 3 | Copyright (C) 2001-2016 Free Software Foundation, Inc. |
852483bc | 4 | |
4c2df51b DJ |
5 | Contributed by Daniel Berlin (dan@dberlin.org) |
6 | ||
7 | This file is part of GDB. | |
8 | ||
9 | This program is free software; you can redistribute it and/or modify | |
10 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 11 | the Free Software Foundation; either version 3 of the License, or |
4c2df51b DJ |
12 | (at your option) any later version. |
13 | ||
14 | This program is distributed in the hope that it will be useful, | |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU General Public License | |
a9762ec7 | 20 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
4c2df51b DJ |
21 | |
22 | #include "defs.h" | |
23 | #include "symtab.h" | |
24 | #include "gdbtypes.h" | |
25 | #include "value.h" | |
26 | #include "gdbcore.h" | |
fa8f86ff | 27 | #include "dwarf2.h" |
4c2df51b | 28 | #include "dwarf2expr.h" |
0fde2c53 | 29 | #include "dwarf2loc.h" |
4c2df51b DJ |
30 | |
31 | /* Local prototypes. */ | |
32 | ||
33 | static void execute_stack_op (struct dwarf_expr_context *, | |
0d45f56e | 34 | const gdb_byte *, const gdb_byte *); |
4c2df51b | 35 | |
8a9b8146 TT |
36 | /* Cookie for gdbarch data. */ |
37 | ||
38 | static struct gdbarch_data *dwarf_arch_cookie; | |
39 | ||
40 | /* This holds gdbarch-specific types used by the DWARF expression | |
41 | evaluator. See comments in execute_stack_op. */ | |
42 | ||
43 | struct dwarf_gdbarch_types | |
44 | { | |
45 | struct type *dw_types[3]; | |
46 | }; | |
47 | ||
48 | /* Allocate and fill in dwarf_gdbarch_types for an arch. */ | |
49 | ||
50 | static void * | |
51 | dwarf_gdbarch_types_init (struct gdbarch *gdbarch) | |
52 | { | |
53 | struct dwarf_gdbarch_types *types | |
54 | = GDBARCH_OBSTACK_ZALLOC (gdbarch, struct dwarf_gdbarch_types); | |
55 | ||
56 | /* The types themselves are lazily initialized. */ | |
57 | ||
58 | return types; | |
59 | } | |
60 | ||
61 | /* Return the type used for DWARF operations where the type is | |
62 | unspecified in the DWARF spec. Only certain sizes are | |
63 | supported. */ | |
64 | ||
65 | static struct type * | |
66 | dwarf_expr_address_type (struct dwarf_expr_context *ctx) | |
67 | { | |
9a3c8263 SM |
68 | struct dwarf_gdbarch_types *types |
69 | = (struct dwarf_gdbarch_types *) gdbarch_data (ctx->gdbarch, | |
70 | dwarf_arch_cookie); | |
8a9b8146 TT |
71 | int ndx; |
72 | ||
73 | if (ctx->addr_size == 2) | |
74 | ndx = 0; | |
75 | else if (ctx->addr_size == 4) | |
76 | ndx = 1; | |
77 | else if (ctx->addr_size == 8) | |
78 | ndx = 2; | |
79 | else | |
80 | error (_("Unsupported address size in DWARF expressions: %d bits"), | |
81 | 8 * ctx->addr_size); | |
82 | ||
83 | if (types->dw_types[ndx] == NULL) | |
84 | types->dw_types[ndx] | |
85 | = arch_integer_type (ctx->gdbarch, | |
86 | 8 * ctx->addr_size, | |
87 | 0, "<signed DWARF address type>"); | |
88 | ||
89 | return types->dw_types[ndx]; | |
90 | } | |
91 | ||
4c2df51b DJ |
92 | /* Create a new context for the expression evaluator. */ |
93 | ||
718b9626 TT |
94 | dwarf_expr_context::dwarf_expr_context () |
95 | : stack (NULL), | |
96 | stack_len (0), | |
97 | stack_allocated (10), | |
98 | gdbarch (NULL), | |
99 | addr_size (0), | |
100 | ref_addr_size (0), | |
101 | offset (0), | |
102 | recursion_depth (0), | |
103 | max_recursion_depth (0x100), | |
104 | location (DWARF_VALUE_MEMORY), | |
105 | len (0), | |
106 | data (NULL), | |
107 | initialized (0), | |
108 | num_pieces (0), | |
109 | pieces (NULL) | |
4c2df51b | 110 | { |
718b9626 | 111 | this->stack = XNEWVEC (struct dwarf_stack_value, this->stack_allocated); |
4c2df51b DJ |
112 | } |
113 | ||
718b9626 | 114 | /* Clean up a dwarf_expr_context. */ |
4c2df51b | 115 | |
718b9626 | 116 | dwarf_expr_context::~dwarf_expr_context () |
4c2df51b | 117 | { |
718b9626 TT |
118 | xfree (this->stack); |
119 | xfree (this->pieces); | |
4a227398 TT |
120 | } |
121 | ||
4c2df51b DJ |
122 | /* Expand the memory allocated to CTX's stack to contain at least |
123 | NEED more elements than are currently used. */ | |
124 | ||
125 | static void | |
126 | dwarf_expr_grow_stack (struct dwarf_expr_context *ctx, size_t need) | |
127 | { | |
128 | if (ctx->stack_len + need > ctx->stack_allocated) | |
129 | { | |
18ec9831 | 130 | size_t newlen = ctx->stack_len + need + 10; |
9a619af0 | 131 | |
224c3ddb | 132 | ctx->stack = XRESIZEVEC (struct dwarf_stack_value, ctx->stack, newlen); |
18ec9831 | 133 | ctx->stack_allocated = newlen; |
4c2df51b DJ |
134 | } |
135 | } | |
136 | ||
137 | /* Push VALUE onto CTX's stack. */ | |
138 | ||
8a9b8146 TT |
139 | static void |
140 | dwarf_expr_push (struct dwarf_expr_context *ctx, struct value *value, | |
44353522 | 141 | int in_stack_memory) |
4c2df51b | 142 | { |
44353522 DE |
143 | struct dwarf_stack_value *v; |
144 | ||
4c2df51b | 145 | dwarf_expr_grow_stack (ctx, 1); |
44353522 DE |
146 | v = &ctx->stack[ctx->stack_len++]; |
147 | v->value = value; | |
148 | v->in_stack_memory = in_stack_memory; | |
4c2df51b DJ |
149 | } |
150 | ||
8a9b8146 | 151 | /* Push VALUE onto CTX's stack. */ |
4c2df51b DJ |
152 | |
153 | void | |
8a9b8146 TT |
154 | dwarf_expr_push_address (struct dwarf_expr_context *ctx, CORE_ADDR value, |
155 | int in_stack_memory) | |
156 | { | |
157 | dwarf_expr_push (ctx, | |
158 | value_from_ulongest (dwarf_expr_address_type (ctx), value), | |
159 | in_stack_memory); | |
160 | } | |
161 | ||
162 | /* Pop the top item off of CTX's stack. */ | |
163 | ||
164 | static void | |
4c2df51b DJ |
165 | dwarf_expr_pop (struct dwarf_expr_context *ctx) |
166 | { | |
167 | if (ctx->stack_len <= 0) | |
8a3fe4f8 | 168 | error (_("dwarf expression stack underflow")); |
4c2df51b DJ |
169 | ctx->stack_len--; |
170 | } | |
171 | ||
172 | /* Retrieve the N'th item on CTX's stack. */ | |
173 | ||
8a9b8146 | 174 | struct value * |
4c2df51b DJ |
175 | dwarf_expr_fetch (struct dwarf_expr_context *ctx, int n) |
176 | { | |
ef0fdf07 | 177 | if (ctx->stack_len <= n) |
3e43a32a MS |
178 | error (_("Asked for position %d of stack, " |
179 | "stack only has %d elements on it."), | |
4c2df51b | 180 | n, ctx->stack_len); |
44353522 | 181 | return ctx->stack[ctx->stack_len - (1 + n)].value; |
8a9b8146 TT |
182 | } |
183 | ||
184 | /* Require that TYPE be an integral type; throw an exception if not. */ | |
44353522 | 185 | |
8a9b8146 TT |
186 | static void |
187 | dwarf_require_integral (struct type *type) | |
188 | { | |
189 | if (TYPE_CODE (type) != TYPE_CODE_INT | |
190 | && TYPE_CODE (type) != TYPE_CODE_CHAR | |
191 | && TYPE_CODE (type) != TYPE_CODE_BOOL) | |
192 | error (_("integral type expected in DWARF expression")); | |
193 | } | |
194 | ||
195 | /* Return the unsigned form of TYPE. TYPE is necessarily an integral | |
196 | type. */ | |
197 | ||
198 | static struct type * | |
199 | get_unsigned_type (struct gdbarch *gdbarch, struct type *type) | |
200 | { | |
201 | switch (TYPE_LENGTH (type)) | |
202 | { | |
203 | case 1: | |
204 | return builtin_type (gdbarch)->builtin_uint8; | |
205 | case 2: | |
206 | return builtin_type (gdbarch)->builtin_uint16; | |
207 | case 4: | |
208 | return builtin_type (gdbarch)->builtin_uint32; | |
209 | case 8: | |
210 | return builtin_type (gdbarch)->builtin_uint64; | |
211 | default: | |
212 | error (_("no unsigned variant found for type, while evaluating " | |
213 | "DWARF expression")); | |
214 | } | |
44353522 DE |
215 | } |
216 | ||
8ddd9a20 TT |
217 | /* Return the signed form of TYPE. TYPE is necessarily an integral |
218 | type. */ | |
219 | ||
220 | static struct type * | |
221 | get_signed_type (struct gdbarch *gdbarch, struct type *type) | |
222 | { | |
223 | switch (TYPE_LENGTH (type)) | |
224 | { | |
225 | case 1: | |
226 | return builtin_type (gdbarch)->builtin_int8; | |
227 | case 2: | |
228 | return builtin_type (gdbarch)->builtin_int16; | |
229 | case 4: | |
230 | return builtin_type (gdbarch)->builtin_int32; | |
231 | case 8: | |
232 | return builtin_type (gdbarch)->builtin_int64; | |
233 | default: | |
234 | error (_("no signed variant found for type, while evaluating " | |
235 | "DWARF expression")); | |
236 | } | |
237 | } | |
238 | ||
f2c7657e UW |
239 | /* Retrieve the N'th item on CTX's stack, converted to an address. */ |
240 | ||
241 | CORE_ADDR | |
242 | dwarf_expr_fetch_address (struct dwarf_expr_context *ctx, int n) | |
243 | { | |
8a9b8146 TT |
244 | struct value *result_val = dwarf_expr_fetch (ctx, n); |
245 | enum bfd_endian byte_order = gdbarch_byte_order (ctx->gdbarch); | |
246 | ULONGEST result; | |
247 | ||
248 | dwarf_require_integral (value_type (result_val)); | |
249 | result = extract_unsigned_integer (value_contents (result_val), | |
250 | TYPE_LENGTH (value_type (result_val)), | |
251 | byte_order); | |
f2c7657e UW |
252 | |
253 | /* For most architectures, calling extract_unsigned_integer() alone | |
254 | is sufficient for extracting an address. However, some | |
255 | architectures (e.g. MIPS) use signed addresses and using | |
256 | extract_unsigned_integer() will not produce a correct | |
257 | result. Make sure we invoke gdbarch_integer_to_address() | |
258 | for those architectures which require it. */ | |
259 | if (gdbarch_integer_to_address_p (ctx->gdbarch)) | |
260 | { | |
224c3ddb | 261 | gdb_byte *buf = (gdb_byte *) alloca (ctx->addr_size); |
8a9b8146 TT |
262 | struct type *int_type = get_unsigned_type (ctx->gdbarch, |
263 | value_type (result_val)); | |
f2c7657e UW |
264 | |
265 | store_unsigned_integer (buf, ctx->addr_size, byte_order, result); | |
266 | return gdbarch_integer_to_address (ctx->gdbarch, int_type, buf); | |
267 | } | |
268 | ||
269 | return (CORE_ADDR) result; | |
270 | } | |
271 | ||
44353522 DE |
272 | /* Retrieve the in_stack_memory flag of the N'th item on CTX's stack. */ |
273 | ||
274 | int | |
275 | dwarf_expr_fetch_in_stack_memory (struct dwarf_expr_context *ctx, int n) | |
276 | { | |
277 | if (ctx->stack_len <= n) | |
3e43a32a MS |
278 | error (_("Asked for position %d of stack, " |
279 | "stack only has %d elements on it."), | |
44353522 DE |
280 | n, ctx->stack_len); |
281 | return ctx->stack[ctx->stack_len - (1 + n)].in_stack_memory; | |
4c2df51b DJ |
282 | } |
283 | ||
cb826367 TT |
284 | /* Return true if the expression stack is empty. */ |
285 | ||
286 | static int | |
287 | dwarf_expr_stack_empty_p (struct dwarf_expr_context *ctx) | |
288 | { | |
289 | return ctx->stack_len == 0; | |
290 | } | |
291 | ||
87808bd6 JB |
292 | /* Add a new piece to CTX's piece list. */ |
293 | static void | |
d3b1e874 | 294 | add_piece (struct dwarf_expr_context *ctx, ULONGEST size, ULONGEST offset) |
87808bd6 JB |
295 | { |
296 | struct dwarf_expr_piece *p; | |
297 | ||
298 | ctx->num_pieces++; | |
299 | ||
224c3ddb SM |
300 | ctx->pieces |
301 | = XRESIZEVEC (struct dwarf_expr_piece, ctx->pieces, ctx->num_pieces); | |
87808bd6 JB |
302 | |
303 | p = &ctx->pieces[ctx->num_pieces - 1]; | |
cec03d70 | 304 | p->location = ctx->location; |
87808bd6 | 305 | p->size = size; |
d3b1e874 TT |
306 | p->offset = offset; |
307 | ||
cec03d70 TT |
308 | if (p->location == DWARF_VALUE_LITERAL) |
309 | { | |
310 | p->v.literal.data = ctx->data; | |
311 | p->v.literal.length = ctx->len; | |
312 | } | |
cb826367 TT |
313 | else if (dwarf_expr_stack_empty_p (ctx)) |
314 | { | |
315 | p->location = DWARF_VALUE_OPTIMIZED_OUT; | |
316 | /* Also reset the context's location, for our callers. This is | |
317 | a somewhat strange approach, but this lets us avoid setting | |
318 | the location to DWARF_VALUE_MEMORY in all the individual | |
319 | cases in the evaluator. */ | |
320 | ctx->location = DWARF_VALUE_OPTIMIZED_OUT; | |
321 | } | |
f2c7657e UW |
322 | else if (p->location == DWARF_VALUE_MEMORY) |
323 | { | |
324 | p->v.mem.addr = dwarf_expr_fetch_address (ctx, 0); | |
325 | p->v.mem.in_stack_memory = dwarf_expr_fetch_in_stack_memory (ctx, 0); | |
326 | } | |
8cf6f0b1 TT |
327 | else if (p->location == DWARF_VALUE_IMPLICIT_POINTER) |
328 | { | |
8b9737bf | 329 | p->v.ptr.die.sect_off = ctx->len; |
8a9b8146 | 330 | p->v.ptr.offset = value_as_long (dwarf_expr_fetch (ctx, 0)); |
8cf6f0b1 | 331 | } |
8a9b8146 TT |
332 | else if (p->location == DWARF_VALUE_REGISTER) |
333 | p->v.regno = value_as_long (dwarf_expr_fetch (ctx, 0)); | |
cec03d70 | 334 | else |
44353522 | 335 | { |
f2c7657e | 336 | p->v.value = dwarf_expr_fetch (ctx, 0); |
44353522 | 337 | } |
87808bd6 JB |
338 | } |
339 | ||
4c2df51b DJ |
340 | /* Evaluate the expression at ADDR (LEN bytes long) using the context |
341 | CTX. */ | |
342 | ||
343 | void | |
0d45f56e TT |
344 | dwarf_expr_eval (struct dwarf_expr_context *ctx, const gdb_byte *addr, |
345 | size_t len) | |
4c2df51b | 346 | { |
1e3a102a JK |
347 | int old_recursion_depth = ctx->recursion_depth; |
348 | ||
4c2df51b | 349 | execute_stack_op (ctx, addr, addr + len); |
1e3a102a JK |
350 | |
351 | /* CTX RECURSION_DEPTH becomes invalid if an exception was thrown here. */ | |
352 | ||
353 | gdb_assert (ctx->recursion_depth == old_recursion_depth); | |
4c2df51b DJ |
354 | } |
355 | ||
f664829e | 356 | /* Helper to read a uleb128 value or throw an error. */ |
4c2df51b | 357 | |
0d45f56e | 358 | const gdb_byte * |
f664829e | 359 | safe_read_uleb128 (const gdb_byte *buf, const gdb_byte *buf_end, |
9fccedf7 | 360 | uint64_t *r) |
4c2df51b | 361 | { |
f664829e DE |
362 | buf = gdb_read_uleb128 (buf, buf_end, r); |
363 | if (buf == NULL) | |
364 | error (_("DWARF expression error: ran off end of buffer reading uleb128 value")); | |
4c2df51b DJ |
365 | return buf; |
366 | } | |
367 | ||
f664829e | 368 | /* Helper to read a sleb128 value or throw an error. */ |
4c2df51b | 369 | |
0d45f56e | 370 | const gdb_byte * |
f664829e | 371 | safe_read_sleb128 (const gdb_byte *buf, const gdb_byte *buf_end, |
9fccedf7 | 372 | int64_t *r) |
4c2df51b | 373 | { |
f664829e DE |
374 | buf = gdb_read_sleb128 (buf, buf_end, r); |
375 | if (buf == NULL) | |
376 | error (_("DWARF expression error: ran off end of buffer reading sleb128 value")); | |
377 | return buf; | |
378 | } | |
4c2df51b | 379 | |
f664829e DE |
380 | const gdb_byte * |
381 | safe_skip_leb128 (const gdb_byte *buf, const gdb_byte *buf_end) | |
382 | { | |
383 | buf = gdb_skip_leb128 (buf, buf_end); | |
384 | if (buf == NULL) | |
385 | error (_("DWARF expression error: ran off end of buffer reading leb128 value")); | |
4c2df51b DJ |
386 | return buf; |
387 | } | |
4c2df51b | 388 | \f |
cec03d70 TT |
389 | |
390 | /* Check that the current operator is either at the end of an | |
f206f69c AA |
391 | expression, or that it is followed by a composition operator or by |
392 | DW_OP_GNU_uninit (which should terminate the expression). */ | |
cec03d70 | 393 | |
3cf03773 TT |
394 | void |
395 | dwarf_expr_require_composition (const gdb_byte *op_ptr, const gdb_byte *op_end, | |
396 | const char *op_name) | |
cec03d70 | 397 | { |
f206f69c AA |
398 | if (op_ptr != op_end && *op_ptr != DW_OP_piece && *op_ptr != DW_OP_bit_piece |
399 | && *op_ptr != DW_OP_GNU_uninit) | |
cec03d70 | 400 | error (_("DWARF-2 expression error: `%s' operations must be " |
64b9b334 | 401 | "used either alone or in conjunction with DW_OP_piece " |
cec03d70 TT |
402 | "or DW_OP_bit_piece."), |
403 | op_name); | |
404 | } | |
405 | ||
8a9b8146 TT |
406 | /* Return true iff the types T1 and T2 are "the same". This only does |
407 | checks that might reasonably be needed to compare DWARF base | |
408 | types. */ | |
409 | ||
410 | static int | |
411 | base_types_equal_p (struct type *t1, struct type *t2) | |
412 | { | |
413 | if (TYPE_CODE (t1) != TYPE_CODE (t2)) | |
414 | return 0; | |
415 | if (TYPE_UNSIGNED (t1) != TYPE_UNSIGNED (t2)) | |
416 | return 0; | |
417 | return TYPE_LENGTH (t1) == TYPE_LENGTH (t2); | |
418 | } | |
419 | ||
420 | /* A convenience function to call get_base_type on CTX and return the | |
421 | result. DIE is the DIE whose type we need. SIZE is non-zero if | |
422 | this function should verify that the resulting type has the correct | |
423 | size. */ | |
424 | ||
425 | static struct type * | |
b64f50a1 | 426 | dwarf_get_base_type (struct dwarf_expr_context *ctx, cu_offset die, int size) |
8a9b8146 TT |
427 | { |
428 | struct type *result; | |
429 | ||
9e8b7a03 | 430 | if (ctx->funcs->get_base_type) |
8a9b8146 | 431 | { |
9e8b7a03 | 432 | result = ctx->funcs->get_base_type (ctx, die); |
9ff3b74f TT |
433 | if (result == NULL) |
434 | error (_("Could not find type for DW_OP_GNU_const_type")); | |
8a9b8146 TT |
435 | if (size != 0 && TYPE_LENGTH (result) != size) |
436 | error (_("DW_OP_GNU_const_type has different sizes for type and data")); | |
437 | } | |
438 | else | |
439 | /* Anything will do. */ | |
440 | result = builtin_type (ctx->gdbarch)->builtin_int; | |
441 | ||
442 | return result; | |
443 | } | |
444 | ||
8e3b41a9 JK |
445 | /* If <BUF..BUF_END] contains DW_FORM_block* with single DW_OP_reg* return the |
446 | DWARF register number. Otherwise return -1. */ | |
447 | ||
448 | int | |
449 | dwarf_block_to_dwarf_reg (const gdb_byte *buf, const gdb_byte *buf_end) | |
450 | { | |
9fccedf7 | 451 | uint64_t dwarf_reg; |
8e3b41a9 JK |
452 | |
453 | if (buf_end <= buf) | |
454 | return -1; | |
455 | if (*buf >= DW_OP_reg0 && *buf <= DW_OP_reg31) | |
456 | { | |
457 | if (buf_end - buf != 1) | |
458 | return -1; | |
459 | return *buf - DW_OP_reg0; | |
460 | } | |
461 | ||
462 | if (*buf == DW_OP_GNU_regval_type) | |
463 | { | |
464 | buf++; | |
f664829e DE |
465 | buf = gdb_read_uleb128 (buf, buf_end, &dwarf_reg); |
466 | if (buf == NULL) | |
467 | return -1; | |
468 | buf = gdb_skip_leb128 (buf, buf_end); | |
469 | if (buf == NULL) | |
470 | return -1; | |
8e3b41a9 JK |
471 | } |
472 | else if (*buf == DW_OP_regx) | |
473 | { | |
474 | buf++; | |
f664829e DE |
475 | buf = gdb_read_uleb128 (buf, buf_end, &dwarf_reg); |
476 | if (buf == NULL) | |
477 | return -1; | |
8e3b41a9 JK |
478 | } |
479 | else | |
480 | return -1; | |
481 | if (buf != buf_end || (int) dwarf_reg != dwarf_reg) | |
482 | return -1; | |
483 | return dwarf_reg; | |
484 | } | |
485 | ||
a471c594 JK |
486 | /* If <BUF..BUF_END] contains DW_FORM_block* with just DW_OP_breg*(0) and |
487 | DW_OP_deref* return the DWARF register number. Otherwise return -1. | |
488 | DEREF_SIZE_RETURN contains -1 for DW_OP_deref; otherwise it contains the | |
489 | size from DW_OP_deref_size. */ | |
490 | ||
491 | int | |
492 | dwarf_block_to_dwarf_reg_deref (const gdb_byte *buf, const gdb_byte *buf_end, | |
493 | CORE_ADDR *deref_size_return) | |
494 | { | |
9fccedf7 DE |
495 | uint64_t dwarf_reg; |
496 | int64_t offset; | |
a471c594 JK |
497 | |
498 | if (buf_end <= buf) | |
499 | return -1; | |
f664829e | 500 | |
a471c594 JK |
501 | if (*buf >= DW_OP_breg0 && *buf <= DW_OP_breg31) |
502 | { | |
503 | dwarf_reg = *buf - DW_OP_breg0; | |
504 | buf++; | |
f664829e DE |
505 | if (buf >= buf_end) |
506 | return -1; | |
a471c594 JK |
507 | } |
508 | else if (*buf == DW_OP_bregx) | |
509 | { | |
510 | buf++; | |
f664829e DE |
511 | buf = gdb_read_uleb128 (buf, buf_end, &dwarf_reg); |
512 | if (buf == NULL) | |
513 | return -1; | |
a471c594 JK |
514 | if ((int) dwarf_reg != dwarf_reg) |
515 | return -1; | |
516 | } | |
517 | else | |
518 | return -1; | |
519 | ||
f664829e DE |
520 | buf = gdb_read_sleb128 (buf, buf_end, &offset); |
521 | if (buf == NULL) | |
a471c594 | 522 | return -1; |
f664829e | 523 | if (offset != 0) |
a471c594 JK |
524 | return -1; |
525 | ||
526 | if (*buf == DW_OP_deref) | |
527 | { | |
528 | buf++; | |
529 | *deref_size_return = -1; | |
530 | } | |
531 | else if (*buf == DW_OP_deref_size) | |
532 | { | |
533 | buf++; | |
534 | if (buf >= buf_end) | |
535 | return -1; | |
536 | *deref_size_return = *buf++; | |
537 | } | |
538 | else | |
539 | return -1; | |
540 | ||
541 | if (buf != buf_end) | |
542 | return -1; | |
543 | ||
544 | return dwarf_reg; | |
545 | } | |
546 | ||
e18b2753 JK |
547 | /* If <BUF..BUF_END] contains DW_FORM_block* with single DW_OP_fbreg(X) fill |
548 | in FB_OFFSET_RETURN with the X offset and return 1. Otherwise return 0. */ | |
549 | ||
550 | int | |
551 | dwarf_block_to_fb_offset (const gdb_byte *buf, const gdb_byte *buf_end, | |
552 | CORE_ADDR *fb_offset_return) | |
553 | { | |
9fccedf7 | 554 | int64_t fb_offset; |
e18b2753 JK |
555 | |
556 | if (buf_end <= buf) | |
557 | return 0; | |
558 | ||
559 | if (*buf != DW_OP_fbreg) | |
560 | return 0; | |
561 | buf++; | |
562 | ||
f664829e DE |
563 | buf = gdb_read_sleb128 (buf, buf_end, &fb_offset); |
564 | if (buf == NULL) | |
565 | return 0; | |
e18b2753 JK |
566 | *fb_offset_return = fb_offset; |
567 | if (buf != buf_end || fb_offset != (LONGEST) *fb_offset_return) | |
568 | return 0; | |
569 | ||
570 | return 1; | |
571 | } | |
572 | ||
573 | /* If <BUF..BUF_END] contains DW_FORM_block* with single DW_OP_bregSP(X) fill | |
574 | in SP_OFFSET_RETURN with the X offset and return 1. Otherwise return 0. | |
575 | The matched SP register number depends on GDBARCH. */ | |
576 | ||
577 | int | |
578 | dwarf_block_to_sp_offset (struct gdbarch *gdbarch, const gdb_byte *buf, | |
579 | const gdb_byte *buf_end, CORE_ADDR *sp_offset_return) | |
580 | { | |
9fccedf7 DE |
581 | uint64_t dwarf_reg; |
582 | int64_t sp_offset; | |
e18b2753 JK |
583 | |
584 | if (buf_end <= buf) | |
585 | return 0; | |
586 | if (*buf >= DW_OP_breg0 && *buf <= DW_OP_breg31) | |
587 | { | |
588 | dwarf_reg = *buf - DW_OP_breg0; | |
589 | buf++; | |
590 | } | |
591 | else | |
592 | { | |
593 | if (*buf != DW_OP_bregx) | |
594 | return 0; | |
595 | buf++; | |
f664829e DE |
596 | buf = gdb_read_uleb128 (buf, buf_end, &dwarf_reg); |
597 | if (buf == NULL) | |
598 | return 0; | |
e18b2753 JK |
599 | } |
600 | ||
0fde2c53 | 601 | if (dwarf_reg_to_regnum (gdbarch, dwarf_reg) |
e18b2753 JK |
602 | != gdbarch_sp_regnum (gdbarch)) |
603 | return 0; | |
604 | ||
f664829e DE |
605 | buf = gdb_read_sleb128 (buf, buf_end, &sp_offset); |
606 | if (buf == NULL) | |
607 | return 0; | |
e18b2753 JK |
608 | *sp_offset_return = sp_offset; |
609 | if (buf != buf_end || sp_offset != (LONGEST) *sp_offset_return) | |
610 | return 0; | |
611 | ||
612 | return 1; | |
613 | } | |
614 | ||
4c2df51b DJ |
615 | /* The engine for the expression evaluator. Using the context in CTX, |
616 | evaluate the expression between OP_PTR and OP_END. */ | |
617 | ||
618 | static void | |
852483bc | 619 | execute_stack_op (struct dwarf_expr_context *ctx, |
0d45f56e | 620 | const gdb_byte *op_ptr, const gdb_byte *op_end) |
4c2df51b | 621 | { |
e17a4113 | 622 | enum bfd_endian byte_order = gdbarch_byte_order (ctx->gdbarch); |
8a9b8146 TT |
623 | /* Old-style "untyped" DWARF values need special treatment in a |
624 | couple of places, specifically DW_OP_mod and DW_OP_shr. We need | |
625 | a special type for these values so we can distinguish them from | |
626 | values that have an explicit type, because explicitly-typed | |
627 | values do not need special treatment. This special type must be | |
628 | different (in the `==' sense) from any base type coming from the | |
629 | CU. */ | |
630 | struct type *address_type = dwarf_expr_address_type (ctx); | |
9a619af0 | 631 | |
cec03d70 | 632 | ctx->location = DWARF_VALUE_MEMORY; |
42be36b3 | 633 | ctx->initialized = 1; /* Default is initialized. */ |
18ec9831 | 634 | |
1e3a102a JK |
635 | if (ctx->recursion_depth > ctx->max_recursion_depth) |
636 | error (_("DWARF-2 expression error: Loop detected (%d)."), | |
637 | ctx->recursion_depth); | |
638 | ctx->recursion_depth++; | |
639 | ||
4c2df51b DJ |
640 | while (op_ptr < op_end) |
641 | { | |
aead7601 | 642 | enum dwarf_location_atom op = (enum dwarf_location_atom) *op_ptr++; |
f2c7657e | 643 | ULONGEST result; |
44353522 DE |
644 | /* Assume the value is not in stack memory. |
645 | Code that knows otherwise sets this to 1. | |
646 | Some arithmetic on stack addresses can probably be assumed to still | |
647 | be a stack address, but we skip this complication for now. | |
648 | This is just an optimization, so it's always ok to punt | |
649 | and leave this as 0. */ | |
650 | int in_stack_memory = 0; | |
9fccedf7 DE |
651 | uint64_t uoffset, reg; |
652 | int64_t offset; | |
8a9b8146 | 653 | struct value *result_val = NULL; |
4c2df51b | 654 | |
e0e9434c TT |
655 | /* The DWARF expression might have a bug causing an infinite |
656 | loop. In that case, quitting is the only way out. */ | |
657 | QUIT; | |
658 | ||
4c2df51b DJ |
659 | switch (op) |
660 | { | |
661 | case DW_OP_lit0: | |
662 | case DW_OP_lit1: | |
663 | case DW_OP_lit2: | |
664 | case DW_OP_lit3: | |
665 | case DW_OP_lit4: | |
666 | case DW_OP_lit5: | |
667 | case DW_OP_lit6: | |
668 | case DW_OP_lit7: | |
669 | case DW_OP_lit8: | |
670 | case DW_OP_lit9: | |
671 | case DW_OP_lit10: | |
672 | case DW_OP_lit11: | |
673 | case DW_OP_lit12: | |
674 | case DW_OP_lit13: | |
675 | case DW_OP_lit14: | |
676 | case DW_OP_lit15: | |
677 | case DW_OP_lit16: | |
678 | case DW_OP_lit17: | |
679 | case DW_OP_lit18: | |
680 | case DW_OP_lit19: | |
681 | case DW_OP_lit20: | |
682 | case DW_OP_lit21: | |
683 | case DW_OP_lit22: | |
684 | case DW_OP_lit23: | |
685 | case DW_OP_lit24: | |
686 | case DW_OP_lit25: | |
687 | case DW_OP_lit26: | |
688 | case DW_OP_lit27: | |
689 | case DW_OP_lit28: | |
690 | case DW_OP_lit29: | |
691 | case DW_OP_lit30: | |
692 | case DW_OP_lit31: | |
693 | result = op - DW_OP_lit0; | |
8a9b8146 | 694 | result_val = value_from_ulongest (address_type, result); |
4c2df51b DJ |
695 | break; |
696 | ||
697 | case DW_OP_addr: | |
f2c7657e UW |
698 | result = extract_unsigned_integer (op_ptr, |
699 | ctx->addr_size, byte_order); | |
ae0d2f24 | 700 | op_ptr += ctx->addr_size; |
ac56253d TT |
701 | /* Some versions of GCC emit DW_OP_addr before |
702 | DW_OP_GNU_push_tls_address. In this case the value is an | |
703 | index, not an address. We don't support things like | |
704 | branching between the address and the TLS op. */ | |
705 | if (op_ptr >= op_end || *op_ptr != DW_OP_GNU_push_tls_address) | |
706 | result += ctx->offset; | |
8a9b8146 | 707 | result_val = value_from_ulongest (address_type, result); |
4c2df51b DJ |
708 | break; |
709 | ||
3019eac3 | 710 | case DW_OP_GNU_addr_index: |
49f6c839 DE |
711 | op_ptr = safe_read_uleb128 (op_ptr, op_end, &uoffset); |
712 | result = (ctx->funcs->get_addr_index) (ctx->baton, uoffset); | |
713 | result += ctx->offset; | |
714 | result_val = value_from_ulongest (address_type, result); | |
715 | break; | |
716 | case DW_OP_GNU_const_index: | |
f664829e | 717 | op_ptr = safe_read_uleb128 (op_ptr, op_end, &uoffset); |
3019eac3 DE |
718 | result = (ctx->funcs->get_addr_index) (ctx->baton, uoffset); |
719 | result_val = value_from_ulongest (address_type, result); | |
720 | break; | |
721 | ||
4c2df51b | 722 | case DW_OP_const1u: |
e17a4113 | 723 | result = extract_unsigned_integer (op_ptr, 1, byte_order); |
8a9b8146 | 724 | result_val = value_from_ulongest (address_type, result); |
4c2df51b DJ |
725 | op_ptr += 1; |
726 | break; | |
727 | case DW_OP_const1s: | |
e17a4113 | 728 | result = extract_signed_integer (op_ptr, 1, byte_order); |
8a9b8146 | 729 | result_val = value_from_ulongest (address_type, result); |
4c2df51b DJ |
730 | op_ptr += 1; |
731 | break; | |
732 | case DW_OP_const2u: | |
e17a4113 | 733 | result = extract_unsigned_integer (op_ptr, 2, byte_order); |
8a9b8146 | 734 | result_val = value_from_ulongest (address_type, result); |
4c2df51b DJ |
735 | op_ptr += 2; |
736 | break; | |
737 | case DW_OP_const2s: | |
e17a4113 | 738 | result = extract_signed_integer (op_ptr, 2, byte_order); |
8a9b8146 | 739 | result_val = value_from_ulongest (address_type, result); |
4c2df51b DJ |
740 | op_ptr += 2; |
741 | break; | |
742 | case DW_OP_const4u: | |
e17a4113 | 743 | result = extract_unsigned_integer (op_ptr, 4, byte_order); |
8a9b8146 | 744 | result_val = value_from_ulongest (address_type, result); |
4c2df51b DJ |
745 | op_ptr += 4; |
746 | break; | |
747 | case DW_OP_const4s: | |
e17a4113 | 748 | result = extract_signed_integer (op_ptr, 4, byte_order); |
8a9b8146 | 749 | result_val = value_from_ulongest (address_type, result); |
4c2df51b DJ |
750 | op_ptr += 4; |
751 | break; | |
752 | case DW_OP_const8u: | |
e17a4113 | 753 | result = extract_unsigned_integer (op_ptr, 8, byte_order); |
8a9b8146 | 754 | result_val = value_from_ulongest (address_type, result); |
4c2df51b DJ |
755 | op_ptr += 8; |
756 | break; | |
757 | case DW_OP_const8s: | |
e17a4113 | 758 | result = extract_signed_integer (op_ptr, 8, byte_order); |
8a9b8146 | 759 | result_val = value_from_ulongest (address_type, result); |
4c2df51b DJ |
760 | op_ptr += 8; |
761 | break; | |
762 | case DW_OP_constu: | |
f664829e | 763 | op_ptr = safe_read_uleb128 (op_ptr, op_end, &uoffset); |
4c2df51b | 764 | result = uoffset; |
8a9b8146 | 765 | result_val = value_from_ulongest (address_type, result); |
4c2df51b DJ |
766 | break; |
767 | case DW_OP_consts: | |
f664829e | 768 | op_ptr = safe_read_sleb128 (op_ptr, op_end, &offset); |
4c2df51b | 769 | result = offset; |
8a9b8146 | 770 | result_val = value_from_ulongest (address_type, result); |
4c2df51b DJ |
771 | break; |
772 | ||
773 | /* The DW_OP_reg operations are required to occur alone in | |
774 | location expressions. */ | |
775 | case DW_OP_reg0: | |
776 | case DW_OP_reg1: | |
777 | case DW_OP_reg2: | |
778 | case DW_OP_reg3: | |
779 | case DW_OP_reg4: | |
780 | case DW_OP_reg5: | |
781 | case DW_OP_reg6: | |
782 | case DW_OP_reg7: | |
783 | case DW_OP_reg8: | |
784 | case DW_OP_reg9: | |
785 | case DW_OP_reg10: | |
786 | case DW_OP_reg11: | |
787 | case DW_OP_reg12: | |
788 | case DW_OP_reg13: | |
789 | case DW_OP_reg14: | |
790 | case DW_OP_reg15: | |
791 | case DW_OP_reg16: | |
792 | case DW_OP_reg17: | |
793 | case DW_OP_reg18: | |
794 | case DW_OP_reg19: | |
795 | case DW_OP_reg20: | |
796 | case DW_OP_reg21: | |
797 | case DW_OP_reg22: | |
798 | case DW_OP_reg23: | |
799 | case DW_OP_reg24: | |
800 | case DW_OP_reg25: | |
801 | case DW_OP_reg26: | |
802 | case DW_OP_reg27: | |
803 | case DW_OP_reg28: | |
804 | case DW_OP_reg29: | |
805 | case DW_OP_reg30: | |
806 | case DW_OP_reg31: | |
f206f69c | 807 | dwarf_expr_require_composition (op_ptr, op_end, "DW_OP_reg"); |
4c2df51b | 808 | |
61fbb938 | 809 | result = op - DW_OP_reg0; |
8a9b8146 | 810 | result_val = value_from_ulongest (address_type, result); |
cec03d70 | 811 | ctx->location = DWARF_VALUE_REGISTER; |
4c2df51b DJ |
812 | break; |
813 | ||
814 | case DW_OP_regx: | |
f664829e | 815 | op_ptr = safe_read_uleb128 (op_ptr, op_end, ®); |
3cf03773 | 816 | dwarf_expr_require_composition (op_ptr, op_end, "DW_OP_regx"); |
4c2df51b | 817 | |
61fbb938 | 818 | result = reg; |
8a9b8146 | 819 | result_val = value_from_ulongest (address_type, result); |
cec03d70 | 820 | ctx->location = DWARF_VALUE_REGISTER; |
4c2df51b DJ |
821 | break; |
822 | ||
cec03d70 TT |
823 | case DW_OP_implicit_value: |
824 | { | |
9fccedf7 | 825 | uint64_t len; |
9a619af0 | 826 | |
f664829e | 827 | op_ptr = safe_read_uleb128 (op_ptr, op_end, &len); |
cec03d70 TT |
828 | if (op_ptr + len > op_end) |
829 | error (_("DW_OP_implicit_value: too few bytes available.")); | |
830 | ctx->len = len; | |
831 | ctx->data = op_ptr; | |
832 | ctx->location = DWARF_VALUE_LITERAL; | |
833 | op_ptr += len; | |
3cf03773 TT |
834 | dwarf_expr_require_composition (op_ptr, op_end, |
835 | "DW_OP_implicit_value"); | |
cec03d70 TT |
836 | } |
837 | goto no_push; | |
838 | ||
839 | case DW_OP_stack_value: | |
840 | ctx->location = DWARF_VALUE_STACK; | |
3cf03773 | 841 | dwarf_expr_require_composition (op_ptr, op_end, "DW_OP_stack_value"); |
cec03d70 TT |
842 | goto no_push; |
843 | ||
8cf6f0b1 TT |
844 | case DW_OP_GNU_implicit_pointer: |
845 | { | |
9fccedf7 | 846 | int64_t len; |
8cf6f0b1 | 847 | |
181cebd4 JK |
848 | if (ctx->ref_addr_size == -1) |
849 | error (_("DWARF-2 expression error: DW_OP_GNU_implicit_pointer " | |
850 | "is not allowed in frame context")); | |
851 | ||
8b9737bf | 852 | /* The referred-to DIE of sect_offset kind. */ |
181cebd4 | 853 | ctx->len = extract_unsigned_integer (op_ptr, ctx->ref_addr_size, |
8cf6f0b1 | 854 | byte_order); |
181cebd4 | 855 | op_ptr += ctx->ref_addr_size; |
8cf6f0b1 TT |
856 | |
857 | /* The byte offset into the data. */ | |
f664829e | 858 | op_ptr = safe_read_sleb128 (op_ptr, op_end, &len); |
8cf6f0b1 | 859 | result = (ULONGEST) len; |
8a9b8146 | 860 | result_val = value_from_ulongest (address_type, result); |
8cf6f0b1 TT |
861 | |
862 | ctx->location = DWARF_VALUE_IMPLICIT_POINTER; | |
863 | dwarf_expr_require_composition (op_ptr, op_end, | |
864 | "DW_OP_GNU_implicit_pointer"); | |
865 | } | |
866 | break; | |
867 | ||
4c2df51b DJ |
868 | case DW_OP_breg0: |
869 | case DW_OP_breg1: | |
870 | case DW_OP_breg2: | |
871 | case DW_OP_breg3: | |
872 | case DW_OP_breg4: | |
873 | case DW_OP_breg5: | |
874 | case DW_OP_breg6: | |
875 | case DW_OP_breg7: | |
876 | case DW_OP_breg8: | |
877 | case DW_OP_breg9: | |
878 | case DW_OP_breg10: | |
879 | case DW_OP_breg11: | |
880 | case DW_OP_breg12: | |
881 | case DW_OP_breg13: | |
882 | case DW_OP_breg14: | |
883 | case DW_OP_breg15: | |
884 | case DW_OP_breg16: | |
885 | case DW_OP_breg17: | |
886 | case DW_OP_breg18: | |
887 | case DW_OP_breg19: | |
888 | case DW_OP_breg20: | |
889 | case DW_OP_breg21: | |
890 | case DW_OP_breg22: | |
891 | case DW_OP_breg23: | |
892 | case DW_OP_breg24: | |
893 | case DW_OP_breg25: | |
894 | case DW_OP_breg26: | |
895 | case DW_OP_breg27: | |
896 | case DW_OP_breg28: | |
897 | case DW_OP_breg29: | |
898 | case DW_OP_breg30: | |
899 | case DW_OP_breg31: | |
900 | { | |
f664829e | 901 | op_ptr = safe_read_sleb128 (op_ptr, op_end, &offset); |
b1370418 JB |
902 | result = (ctx->funcs->read_addr_from_reg) (ctx->baton, |
903 | op - DW_OP_breg0); | |
4c2df51b | 904 | result += offset; |
8a9b8146 | 905 | result_val = value_from_ulongest (address_type, result); |
4c2df51b DJ |
906 | } |
907 | break; | |
908 | case DW_OP_bregx: | |
909 | { | |
f664829e DE |
910 | op_ptr = safe_read_uleb128 (op_ptr, op_end, ®); |
911 | op_ptr = safe_read_sleb128 (op_ptr, op_end, &offset); | |
b1370418 | 912 | result = (ctx->funcs->read_addr_from_reg) (ctx->baton, reg); |
4c2df51b | 913 | result += offset; |
8a9b8146 | 914 | result_val = value_from_ulongest (address_type, result); |
4c2df51b DJ |
915 | } |
916 | break; | |
917 | case DW_OP_fbreg: | |
918 | { | |
0d45f56e | 919 | const gdb_byte *datastart; |
4c2df51b DJ |
920 | size_t datalen; |
921 | unsigned int before_stack_len; | |
922 | ||
f664829e | 923 | op_ptr = safe_read_sleb128 (op_ptr, op_end, &offset); |
4c2df51b DJ |
924 | /* Rather than create a whole new context, we simply |
925 | record the stack length before execution, then reset it | |
926 | afterwards, effectively erasing whatever the recursive | |
927 | call put there. */ | |
928 | before_stack_len = ctx->stack_len; | |
da62e633 AC |
929 | /* FIXME: cagney/2003-03-26: This code should be using |
930 | get_frame_base_address(), and then implement a dwarf2 | |
931 | specific this_base method. */ | |
9e8b7a03 | 932 | (ctx->funcs->get_frame_base) (ctx->baton, &datastart, &datalen); |
4c2df51b | 933 | dwarf_expr_eval (ctx, datastart, datalen); |
f2c7657e UW |
934 | if (ctx->location == DWARF_VALUE_MEMORY) |
935 | result = dwarf_expr_fetch_address (ctx, 0); | |
936 | else if (ctx->location == DWARF_VALUE_REGISTER) | |
b1370418 JB |
937 | result = (ctx->funcs->read_addr_from_reg) |
938 | (ctx->baton, | |
939 | value_as_long (dwarf_expr_fetch (ctx, 0))); | |
f2c7657e | 940 | else |
3e43a32a MS |
941 | error (_("Not implemented: computing frame " |
942 | "base using explicit value operator")); | |
4c2df51b | 943 | result = result + offset; |
8a9b8146 | 944 | result_val = value_from_ulongest (address_type, result); |
44353522 | 945 | in_stack_memory = 1; |
4c2df51b | 946 | ctx->stack_len = before_stack_len; |
cec03d70 | 947 | ctx->location = DWARF_VALUE_MEMORY; |
4c2df51b DJ |
948 | } |
949 | break; | |
44353522 | 950 | |
4c2df51b | 951 | case DW_OP_dup: |
8a9b8146 | 952 | result_val = dwarf_expr_fetch (ctx, 0); |
44353522 | 953 | in_stack_memory = dwarf_expr_fetch_in_stack_memory (ctx, 0); |
4c2df51b DJ |
954 | break; |
955 | ||
956 | case DW_OP_drop: | |
957 | dwarf_expr_pop (ctx); | |
958 | goto no_push; | |
959 | ||
960 | case DW_OP_pick: | |
961 | offset = *op_ptr++; | |
8a9b8146 | 962 | result_val = dwarf_expr_fetch (ctx, offset); |
44353522 | 963 | in_stack_memory = dwarf_expr_fetch_in_stack_memory (ctx, offset); |
4c2df51b | 964 | break; |
9f3fe11c TG |
965 | |
966 | case DW_OP_swap: | |
967 | { | |
44353522 | 968 | struct dwarf_stack_value t1, t2; |
9f3fe11c TG |
969 | |
970 | if (ctx->stack_len < 2) | |
3e43a32a | 971 | error (_("Not enough elements for " |
0963b4bd | 972 | "DW_OP_swap. Need 2, have %d."), |
9f3fe11c TG |
973 | ctx->stack_len); |
974 | t1 = ctx->stack[ctx->stack_len - 1]; | |
975 | t2 = ctx->stack[ctx->stack_len - 2]; | |
976 | ctx->stack[ctx->stack_len - 1] = t2; | |
977 | ctx->stack[ctx->stack_len - 2] = t1; | |
978 | goto no_push; | |
979 | } | |
4c2df51b DJ |
980 | |
981 | case DW_OP_over: | |
8a9b8146 | 982 | result_val = dwarf_expr_fetch (ctx, 1); |
44353522 | 983 | in_stack_memory = dwarf_expr_fetch_in_stack_memory (ctx, 1); |
4c2df51b DJ |
984 | break; |
985 | ||
986 | case DW_OP_rot: | |
987 | { | |
44353522 | 988 | struct dwarf_stack_value t1, t2, t3; |
4c2df51b DJ |
989 | |
990 | if (ctx->stack_len < 3) | |
0963b4bd MS |
991 | error (_("Not enough elements for " |
992 | "DW_OP_rot. Need 3, have %d."), | |
4c2df51b DJ |
993 | ctx->stack_len); |
994 | t1 = ctx->stack[ctx->stack_len - 1]; | |
995 | t2 = ctx->stack[ctx->stack_len - 2]; | |
996 | t3 = ctx->stack[ctx->stack_len - 3]; | |
997 | ctx->stack[ctx->stack_len - 1] = t2; | |
998 | ctx->stack[ctx->stack_len - 2] = t3; | |
999 | ctx->stack[ctx->stack_len - 3] = t1; | |
1000 | goto no_push; | |
1001 | } | |
1002 | ||
1003 | case DW_OP_deref: | |
1004 | case DW_OP_deref_size: | |
8a9b8146 | 1005 | case DW_OP_GNU_deref_type: |
f2c7657e UW |
1006 | { |
1007 | int addr_size = (op == DW_OP_deref ? ctx->addr_size : *op_ptr++); | |
224c3ddb | 1008 | gdb_byte *buf = (gdb_byte *) alloca (addr_size); |
f2c7657e | 1009 | CORE_ADDR addr = dwarf_expr_fetch_address (ctx, 0); |
8a9b8146 TT |
1010 | struct type *type; |
1011 | ||
f2c7657e UW |
1012 | dwarf_expr_pop (ctx); |
1013 | ||
8a9b8146 TT |
1014 | if (op == DW_OP_GNU_deref_type) |
1015 | { | |
b64f50a1 | 1016 | cu_offset type_die; |
8a9b8146 | 1017 | |
f664829e | 1018 | op_ptr = safe_read_uleb128 (op_ptr, op_end, &uoffset); |
b64f50a1 | 1019 | type_die.cu_off = uoffset; |
8a9b8146 TT |
1020 | type = dwarf_get_base_type (ctx, type_die, 0); |
1021 | } | |
1022 | else | |
1023 | type = address_type; | |
1024 | ||
9e8b7a03 | 1025 | (ctx->funcs->read_mem) (ctx->baton, buf, addr, addr_size); |
325663dc JB |
1026 | |
1027 | /* If the size of the object read from memory is different | |
1028 | from the type length, we need to zero-extend it. */ | |
1029 | if (TYPE_LENGTH (type) != addr_size) | |
1030 | { | |
1031 | ULONGEST result = | |
1032 | extract_unsigned_integer (buf, addr_size, byte_order); | |
1033 | ||
224c3ddb | 1034 | buf = (gdb_byte *) alloca (TYPE_LENGTH (type)); |
325663dc JB |
1035 | store_unsigned_integer (buf, TYPE_LENGTH (type), |
1036 | byte_order, result); | |
1037 | } | |
1038 | ||
8a9b8146 | 1039 | result_val = value_from_contents_and_address (type, buf, addr); |
f2c7657e UW |
1040 | break; |
1041 | } | |
1042 | ||
4c2df51b DJ |
1043 | case DW_OP_abs: |
1044 | case DW_OP_neg: | |
1045 | case DW_OP_not: | |
1046 | case DW_OP_plus_uconst: | |
8a9b8146 TT |
1047 | { |
1048 | /* Unary operations. */ | |
1049 | result_val = dwarf_expr_fetch (ctx, 0); | |
1050 | dwarf_expr_pop (ctx); | |
4c2df51b | 1051 | |
8a9b8146 TT |
1052 | switch (op) |
1053 | { | |
1054 | case DW_OP_abs: | |
1055 | if (value_less (result_val, | |
1056 | value_zero (value_type (result_val), not_lval))) | |
1057 | result_val = value_neg (result_val); | |
1058 | break; | |
1059 | case DW_OP_neg: | |
1060 | result_val = value_neg (result_val); | |
1061 | break; | |
1062 | case DW_OP_not: | |
1063 | dwarf_require_integral (value_type (result_val)); | |
1064 | result_val = value_complement (result_val); | |
1065 | break; | |
1066 | case DW_OP_plus_uconst: | |
1067 | dwarf_require_integral (value_type (result_val)); | |
1068 | result = value_as_long (result_val); | |
f664829e | 1069 | op_ptr = safe_read_uleb128 (op_ptr, op_end, ®); |
8a9b8146 TT |
1070 | result += reg; |
1071 | result_val = value_from_ulongest (address_type, result); | |
1072 | break; | |
1073 | } | |
1074 | } | |
4c2df51b DJ |
1075 | break; |
1076 | ||
1077 | case DW_OP_and: | |
1078 | case DW_OP_div: | |
1079 | case DW_OP_minus: | |
1080 | case DW_OP_mod: | |
1081 | case DW_OP_mul: | |
1082 | case DW_OP_or: | |
1083 | case DW_OP_plus: | |
1084 | case DW_OP_shl: | |
1085 | case DW_OP_shr: | |
1086 | case DW_OP_shra: | |
1087 | case DW_OP_xor: | |
1088 | case DW_OP_le: | |
1089 | case DW_OP_ge: | |
1090 | case DW_OP_eq: | |
1091 | case DW_OP_lt: | |
1092 | case DW_OP_gt: | |
1093 | case DW_OP_ne: | |
1094 | { | |
f2c7657e | 1095 | /* Binary operations. */ |
8a9b8146 | 1096 | struct value *first, *second; |
4c2df51b DJ |
1097 | |
1098 | second = dwarf_expr_fetch (ctx, 0); | |
1099 | dwarf_expr_pop (ctx); | |
1100 | ||
b263358a | 1101 | first = dwarf_expr_fetch (ctx, 0); |
4c2df51b DJ |
1102 | dwarf_expr_pop (ctx); |
1103 | ||
8a9b8146 TT |
1104 | if (! base_types_equal_p (value_type (first), value_type (second))) |
1105 | error (_("Incompatible types on DWARF stack")); | |
1106 | ||
4c2df51b DJ |
1107 | switch (op) |
1108 | { | |
1109 | case DW_OP_and: | |
8a9b8146 TT |
1110 | dwarf_require_integral (value_type (first)); |
1111 | dwarf_require_integral (value_type (second)); | |
1112 | result_val = value_binop (first, second, BINOP_BITWISE_AND); | |
4c2df51b DJ |
1113 | break; |
1114 | case DW_OP_div: | |
8a9b8146 | 1115 | result_val = value_binop (first, second, BINOP_DIV); |
99c87dab | 1116 | break; |
4c2df51b | 1117 | case DW_OP_minus: |
8a9b8146 | 1118 | result_val = value_binop (first, second, BINOP_SUB); |
4c2df51b DJ |
1119 | break; |
1120 | case DW_OP_mod: | |
8a9b8146 TT |
1121 | { |
1122 | int cast_back = 0; | |
1123 | struct type *orig_type = value_type (first); | |
1124 | ||
1125 | /* We have to special-case "old-style" untyped values | |
1126 | -- these must have mod computed using unsigned | |
1127 | math. */ | |
1128 | if (orig_type == address_type) | |
1129 | { | |
1130 | struct type *utype | |
1131 | = get_unsigned_type (ctx->gdbarch, orig_type); | |
1132 | ||
1133 | cast_back = 1; | |
1134 | first = value_cast (utype, first); | |
1135 | second = value_cast (utype, second); | |
1136 | } | |
1137 | /* Note that value_binop doesn't handle float or | |
1138 | decimal float here. This seems unimportant. */ | |
1139 | result_val = value_binop (first, second, BINOP_MOD); | |
1140 | if (cast_back) | |
1141 | result_val = value_cast (orig_type, result_val); | |
1142 | } | |
4c2df51b DJ |
1143 | break; |
1144 | case DW_OP_mul: | |
8a9b8146 | 1145 | result_val = value_binop (first, second, BINOP_MUL); |
4c2df51b DJ |
1146 | break; |
1147 | case DW_OP_or: | |
8a9b8146 TT |
1148 | dwarf_require_integral (value_type (first)); |
1149 | dwarf_require_integral (value_type (second)); | |
1150 | result_val = value_binop (first, second, BINOP_BITWISE_IOR); | |
4c2df51b DJ |
1151 | break; |
1152 | case DW_OP_plus: | |
8a9b8146 | 1153 | result_val = value_binop (first, second, BINOP_ADD); |
4c2df51b DJ |
1154 | break; |
1155 | case DW_OP_shl: | |
8a9b8146 TT |
1156 | dwarf_require_integral (value_type (first)); |
1157 | dwarf_require_integral (value_type (second)); | |
1158 | result_val = value_binop (first, second, BINOP_LSH); | |
4c2df51b DJ |
1159 | break; |
1160 | case DW_OP_shr: | |
8a9b8146 TT |
1161 | dwarf_require_integral (value_type (first)); |
1162 | dwarf_require_integral (value_type (second)); | |
b087e0ed | 1163 | if (!TYPE_UNSIGNED (value_type (first))) |
8a9b8146 TT |
1164 | { |
1165 | struct type *utype | |
1166 | = get_unsigned_type (ctx->gdbarch, value_type (first)); | |
1167 | ||
1168 | first = value_cast (utype, first); | |
1169 | } | |
1170 | ||
1171 | result_val = value_binop (first, second, BINOP_RSH); | |
1172 | /* Make sure we wind up with the same type we started | |
1173 | with. */ | |
1174 | if (value_type (result_val) != value_type (second)) | |
1175 | result_val = value_cast (value_type (second), result_val); | |
99c87dab | 1176 | break; |
4c2df51b | 1177 | case DW_OP_shra: |
8a9b8146 TT |
1178 | dwarf_require_integral (value_type (first)); |
1179 | dwarf_require_integral (value_type (second)); | |
8ddd9a20 TT |
1180 | if (TYPE_UNSIGNED (value_type (first))) |
1181 | { | |
1182 | struct type *stype | |
1183 | = get_signed_type (ctx->gdbarch, value_type (first)); | |
1184 | ||
1185 | first = value_cast (stype, first); | |
1186 | } | |
1187 | ||
8a9b8146 | 1188 | result_val = value_binop (first, second, BINOP_RSH); |
8ddd9a20 TT |
1189 | /* Make sure we wind up with the same type we started |
1190 | with. */ | |
1191 | if (value_type (result_val) != value_type (second)) | |
1192 | result_val = value_cast (value_type (second), result_val); | |
4c2df51b DJ |
1193 | break; |
1194 | case DW_OP_xor: | |
8a9b8146 TT |
1195 | dwarf_require_integral (value_type (first)); |
1196 | dwarf_require_integral (value_type (second)); | |
1197 | result_val = value_binop (first, second, BINOP_BITWISE_XOR); | |
4c2df51b DJ |
1198 | break; |
1199 | case DW_OP_le: | |
8a9b8146 TT |
1200 | /* A <= B is !(B < A). */ |
1201 | result = ! value_less (second, first); | |
1202 | result_val = value_from_ulongest (address_type, result); | |
4c2df51b DJ |
1203 | break; |
1204 | case DW_OP_ge: | |
8a9b8146 TT |
1205 | /* A >= B is !(A < B). */ |
1206 | result = ! value_less (first, second); | |
1207 | result_val = value_from_ulongest (address_type, result); | |
4c2df51b DJ |
1208 | break; |
1209 | case DW_OP_eq: | |
8a9b8146 TT |
1210 | result = value_equal (first, second); |
1211 | result_val = value_from_ulongest (address_type, result); | |
4c2df51b DJ |
1212 | break; |
1213 | case DW_OP_lt: | |
8a9b8146 TT |
1214 | result = value_less (first, second); |
1215 | result_val = value_from_ulongest (address_type, result); | |
4c2df51b DJ |
1216 | break; |
1217 | case DW_OP_gt: | |
8a9b8146 TT |
1218 | /* A > B is B < A. */ |
1219 | result = value_less (second, first); | |
1220 | result_val = value_from_ulongest (address_type, result); | |
4c2df51b DJ |
1221 | break; |
1222 | case DW_OP_ne: | |
8a9b8146 TT |
1223 | result = ! value_equal (first, second); |
1224 | result_val = value_from_ulongest (address_type, result); | |
4c2df51b DJ |
1225 | break; |
1226 | default: | |
1227 | internal_error (__FILE__, __LINE__, | |
e2e0b3e5 | 1228 | _("Can't be reached.")); |
4c2df51b | 1229 | } |
4c2df51b DJ |
1230 | } |
1231 | break; | |
1232 | ||
e7802207 | 1233 | case DW_OP_call_frame_cfa: |
9e8b7a03 | 1234 | result = (ctx->funcs->get_frame_cfa) (ctx->baton); |
8a9b8146 | 1235 | result_val = value_from_ulongest (address_type, result); |
44353522 | 1236 | in_stack_memory = 1; |
e7802207 TT |
1237 | break; |
1238 | ||
4c2df51b | 1239 | case DW_OP_GNU_push_tls_address: |
4aa4e28b | 1240 | case DW_OP_form_tls_address: |
c3228f12 EZ |
1241 | /* Variable is at a constant offset in the thread-local |
1242 | storage block into the objfile for the current thread and | |
0963b4bd | 1243 | the dynamic linker module containing this expression. Here |
c3228f12 EZ |
1244 | we return returns the offset from that base. The top of the |
1245 | stack has the offset from the beginning of the thread | |
1246 | control block at which the variable is located. Nothing | |
1247 | should follow this operator, so the top of stack would be | |
1248 | returned. */ | |
8a9b8146 | 1249 | result = value_as_long (dwarf_expr_fetch (ctx, 0)); |
4c2df51b | 1250 | dwarf_expr_pop (ctx); |
9e8b7a03 | 1251 | result = (ctx->funcs->get_tls_address) (ctx->baton, result); |
8a9b8146 | 1252 | result_val = value_from_ulongest (address_type, result); |
4c2df51b DJ |
1253 | break; |
1254 | ||
1255 | case DW_OP_skip: | |
e17a4113 | 1256 | offset = extract_signed_integer (op_ptr, 2, byte_order); |
4c2df51b DJ |
1257 | op_ptr += 2; |
1258 | op_ptr += offset; | |
1259 | goto no_push; | |
1260 | ||
1261 | case DW_OP_bra: | |
8a9b8146 TT |
1262 | { |
1263 | struct value *val; | |
1264 | ||
1265 | offset = extract_signed_integer (op_ptr, 2, byte_order); | |
1266 | op_ptr += 2; | |
1267 | val = dwarf_expr_fetch (ctx, 0); | |
1268 | dwarf_require_integral (value_type (val)); | |
1269 | if (value_as_long (val) != 0) | |
1270 | op_ptr += offset; | |
1271 | dwarf_expr_pop (ctx); | |
1272 | } | |
4c2df51b DJ |
1273 | goto no_push; |
1274 | ||
1275 | case DW_OP_nop: | |
1276 | goto no_push; | |
1277 | ||
87808bd6 JB |
1278 | case DW_OP_piece: |
1279 | { | |
9fccedf7 | 1280 | uint64_t size; |
87808bd6 JB |
1281 | |
1282 | /* Record the piece. */ | |
f664829e | 1283 | op_ptr = safe_read_uleb128 (op_ptr, op_end, &size); |
d3b1e874 | 1284 | add_piece (ctx, 8 * size, 0); |
87808bd6 | 1285 | |
cec03d70 TT |
1286 | /* Pop off the address/regnum, and reset the location |
1287 | type. */ | |
cb826367 TT |
1288 | if (ctx->location != DWARF_VALUE_LITERAL |
1289 | && ctx->location != DWARF_VALUE_OPTIMIZED_OUT) | |
cec03d70 TT |
1290 | dwarf_expr_pop (ctx); |
1291 | ctx->location = DWARF_VALUE_MEMORY; | |
87808bd6 JB |
1292 | } |
1293 | goto no_push; | |
1294 | ||
d3b1e874 TT |
1295 | case DW_OP_bit_piece: |
1296 | { | |
9fccedf7 | 1297 | uint64_t size, offset; |
d3b1e874 TT |
1298 | |
1299 | /* Record the piece. */ | |
f664829e DE |
1300 | op_ptr = safe_read_uleb128 (op_ptr, op_end, &size); |
1301 | op_ptr = safe_read_uleb128 (op_ptr, op_end, &offset); | |
d3b1e874 TT |
1302 | add_piece (ctx, size, offset); |
1303 | ||
1304 | /* Pop off the address/regnum, and reset the location | |
1305 | type. */ | |
1306 | if (ctx->location != DWARF_VALUE_LITERAL | |
1307 | && ctx->location != DWARF_VALUE_OPTIMIZED_OUT) | |
1308 | dwarf_expr_pop (ctx); | |
1309 | ctx->location = DWARF_VALUE_MEMORY; | |
1310 | } | |
1311 | goto no_push; | |
1312 | ||
42be36b3 CT |
1313 | case DW_OP_GNU_uninit: |
1314 | if (op_ptr != op_end) | |
9c482037 | 1315 | error (_("DWARF-2 expression error: DW_OP_GNU_uninit must always " |
42be36b3 CT |
1316 | "be the very last op.")); |
1317 | ||
1318 | ctx->initialized = 0; | |
1319 | goto no_push; | |
1320 | ||
5c631832 | 1321 | case DW_OP_call2: |
b64f50a1 JK |
1322 | { |
1323 | cu_offset offset; | |
1324 | ||
1325 | offset.cu_off = extract_unsigned_integer (op_ptr, 2, byte_order); | |
1326 | op_ptr += 2; | |
1327 | ctx->funcs->dwarf_call (ctx, offset); | |
1328 | } | |
5c631832 JK |
1329 | goto no_push; |
1330 | ||
1331 | case DW_OP_call4: | |
b64f50a1 JK |
1332 | { |
1333 | cu_offset offset; | |
1334 | ||
1335 | offset.cu_off = extract_unsigned_integer (op_ptr, 4, byte_order); | |
1336 | op_ptr += 4; | |
1337 | ctx->funcs->dwarf_call (ctx, offset); | |
1338 | } | |
5c631832 | 1339 | goto no_push; |
dd90784c JK |
1340 | |
1341 | case DW_OP_GNU_entry_value: | |
8e3b41a9 | 1342 | { |
9fccedf7 | 1343 | uint64_t len; |
8e3b41a9 | 1344 | CORE_ADDR deref_size; |
24c5c679 | 1345 | union call_site_parameter_u kind_u; |
8e3b41a9 | 1346 | |
f664829e | 1347 | op_ptr = safe_read_uleb128 (op_ptr, op_end, &len); |
8e3b41a9 JK |
1348 | if (op_ptr + len > op_end) |
1349 | error (_("DW_OP_GNU_entry_value: too few bytes available.")); | |
1350 | ||
24c5c679 JK |
1351 | kind_u.dwarf_reg = dwarf_block_to_dwarf_reg (op_ptr, op_ptr + len); |
1352 | if (kind_u.dwarf_reg != -1) | |
8e3b41a9 JK |
1353 | { |
1354 | op_ptr += len; | |
24c5c679 JK |
1355 | ctx->funcs->push_dwarf_reg_entry_value (ctx, |
1356 | CALL_SITE_PARAMETER_DWARF_REG, | |
1357 | kind_u, | |
a471c594 JK |
1358 | -1 /* deref_size */); |
1359 | goto no_push; | |
1360 | } | |
1361 | ||
24c5c679 JK |
1362 | kind_u.dwarf_reg = dwarf_block_to_dwarf_reg_deref (op_ptr, |
1363 | op_ptr + len, | |
1364 | &deref_size); | |
1365 | if (kind_u.dwarf_reg != -1) | |
a471c594 JK |
1366 | { |
1367 | if (deref_size == -1) | |
1368 | deref_size = ctx->addr_size; | |
1369 | op_ptr += len; | |
24c5c679 JK |
1370 | ctx->funcs->push_dwarf_reg_entry_value (ctx, |
1371 | CALL_SITE_PARAMETER_DWARF_REG, | |
1372 | kind_u, deref_size); | |
8e3b41a9 JK |
1373 | goto no_push; |
1374 | } | |
1375 | ||
1376 | error (_("DWARF-2 expression error: DW_OP_GNU_entry_value is " | |
a471c594 JK |
1377 | "supported only for single DW_OP_reg* " |
1378 | "or for DW_OP_breg*(0)+DW_OP_deref*")); | |
8e3b41a9 | 1379 | } |
5c631832 | 1380 | |
1788b2d3 JK |
1381 | case DW_OP_GNU_parameter_ref: |
1382 | { | |
1383 | union call_site_parameter_u kind_u; | |
1384 | ||
1385 | kind_u.param_offset.cu_off = extract_unsigned_integer (op_ptr, 4, | |
1386 | byte_order); | |
1387 | op_ptr += 4; | |
1388 | ctx->funcs->push_dwarf_reg_entry_value (ctx, | |
1389 | CALL_SITE_PARAMETER_PARAM_OFFSET, | |
1390 | kind_u, | |
1391 | -1 /* deref_size */); | |
1392 | } | |
1393 | goto no_push; | |
1394 | ||
8a9b8146 TT |
1395 | case DW_OP_GNU_const_type: |
1396 | { | |
b64f50a1 | 1397 | cu_offset type_die; |
8a9b8146 TT |
1398 | int n; |
1399 | const gdb_byte *data; | |
1400 | struct type *type; | |
1401 | ||
f664829e | 1402 | op_ptr = safe_read_uleb128 (op_ptr, op_end, &uoffset); |
b64f50a1 | 1403 | type_die.cu_off = uoffset; |
8a9b8146 TT |
1404 | n = *op_ptr++; |
1405 | data = op_ptr; | |
1406 | op_ptr += n; | |
1407 | ||
1408 | type = dwarf_get_base_type (ctx, type_die, n); | |
1409 | result_val = value_from_contents (type, data); | |
1410 | } | |
1411 | break; | |
1412 | ||
1413 | case DW_OP_GNU_regval_type: | |
1414 | { | |
b64f50a1 | 1415 | cu_offset type_die; |
8a9b8146 TT |
1416 | struct type *type; |
1417 | ||
f664829e DE |
1418 | op_ptr = safe_read_uleb128 (op_ptr, op_end, ®); |
1419 | op_ptr = safe_read_uleb128 (op_ptr, op_end, &uoffset); | |
b64f50a1 | 1420 | type_die.cu_off = uoffset; |
8a9b8146 TT |
1421 | |
1422 | type = dwarf_get_base_type (ctx, type_die, 0); | |
0acf8b65 | 1423 | result_val = ctx->funcs->get_reg_value (ctx->baton, type, reg); |
8a9b8146 TT |
1424 | } |
1425 | break; | |
1426 | ||
1427 | case DW_OP_GNU_convert: | |
1428 | case DW_OP_GNU_reinterpret: | |
1429 | { | |
b64f50a1 | 1430 | cu_offset type_die; |
8a9b8146 TT |
1431 | struct type *type; |
1432 | ||
f664829e | 1433 | op_ptr = safe_read_uleb128 (op_ptr, op_end, &uoffset); |
b64f50a1 | 1434 | type_die.cu_off = uoffset; |
8a9b8146 | 1435 | |
b64f50a1 | 1436 | if (type_die.cu_off == 0) |
c38c4bc5 TT |
1437 | type = address_type; |
1438 | else | |
1439 | type = dwarf_get_base_type (ctx, type_die, 0); | |
8a9b8146 TT |
1440 | |
1441 | result_val = dwarf_expr_fetch (ctx, 0); | |
1442 | dwarf_expr_pop (ctx); | |
1443 | ||
1444 | if (op == DW_OP_GNU_convert) | |
1445 | result_val = value_cast (type, result_val); | |
1446 | else if (type == value_type (result_val)) | |
1447 | { | |
1448 | /* Nothing. */ | |
1449 | } | |
1450 | else if (TYPE_LENGTH (type) | |
1451 | != TYPE_LENGTH (value_type (result_val))) | |
1452 | error (_("DW_OP_GNU_reinterpret has wrong size")); | |
1453 | else | |
1454 | result_val | |
1455 | = value_from_contents (type, | |
1456 | value_contents_all (result_val)); | |
1457 | } | |
1458 | break; | |
1459 | ||
08412b07 JB |
1460 | case DW_OP_push_object_address: |
1461 | /* Return the address of the object we are currently observing. */ | |
1462 | result = (ctx->funcs->get_object_address) (ctx->baton); | |
1463 | result_val = value_from_ulongest (address_type, result); | |
1464 | break; | |
1465 | ||
4c2df51b | 1466 | default: |
8a3fe4f8 | 1467 | error (_("Unhandled dwarf expression opcode 0x%x"), op); |
4c2df51b DJ |
1468 | } |
1469 | ||
1470 | /* Most things push a result value. */ | |
8a9b8146 TT |
1471 | gdb_assert (result_val != NULL); |
1472 | dwarf_expr_push (ctx, result_val, in_stack_memory); | |
82ae4854 | 1473 | no_push: |
b27cf2b3 | 1474 | ; |
4c2df51b | 1475 | } |
1e3a102a | 1476 | |
8cf6f0b1 TT |
1477 | /* To simplify our main caller, if the result is an implicit |
1478 | pointer, then make a pieced value. This is ok because we can't | |
1479 | have implicit pointers in contexts where pieces are invalid. */ | |
1480 | if (ctx->location == DWARF_VALUE_IMPLICIT_POINTER) | |
1481 | add_piece (ctx, 8 * ctx->addr_size, 0); | |
1482 | ||
dd90784c | 1483 | abort_expression: |
1e3a102a JK |
1484 | ctx->recursion_depth--; |
1485 | gdb_assert (ctx->recursion_depth >= 0); | |
8a9b8146 TT |
1486 | } |
1487 | ||
523f3620 JK |
1488 | /* Stub dwarf_expr_context_funcs.get_frame_base implementation. */ |
1489 | ||
1490 | void | |
1491 | ctx_no_get_frame_base (void *baton, const gdb_byte **start, size_t *length) | |
1492 | { | |
1493 | error (_("%s is invalid in this context"), "DW_OP_fbreg"); | |
1494 | } | |
1495 | ||
1496 | /* Stub dwarf_expr_context_funcs.get_frame_cfa implementation. */ | |
1497 | ||
1498 | CORE_ADDR | |
1499 | ctx_no_get_frame_cfa (void *baton) | |
1500 | { | |
1501 | error (_("%s is invalid in this context"), "DW_OP_call_frame_cfa"); | |
1502 | } | |
1503 | ||
1504 | /* Stub dwarf_expr_context_funcs.get_frame_pc implementation. */ | |
1505 | ||
1506 | CORE_ADDR | |
1507 | ctx_no_get_frame_pc (void *baton) | |
1508 | { | |
1509 | error (_("%s is invalid in this context"), "DW_OP_GNU_implicit_pointer"); | |
1510 | } | |
1511 | ||
1512 | /* Stub dwarf_expr_context_funcs.get_tls_address implementation. */ | |
1513 | ||
1514 | CORE_ADDR | |
1515 | ctx_no_get_tls_address (void *baton, CORE_ADDR offset) | |
1516 | { | |
4aa4e28b | 1517 | error (_("%s is invalid in this context"), "DW_OP_form_tls_address"); |
523f3620 JK |
1518 | } |
1519 | ||
1520 | /* Stub dwarf_expr_context_funcs.dwarf_call implementation. */ | |
1521 | ||
1522 | void | |
b64f50a1 | 1523 | ctx_no_dwarf_call (struct dwarf_expr_context *ctx, cu_offset die_offset) |
523f3620 JK |
1524 | { |
1525 | error (_("%s is invalid in this context"), "DW_OP_call*"); | |
1526 | } | |
1527 | ||
1528 | /* Stub dwarf_expr_context_funcs.get_base_type implementation. */ | |
1529 | ||
1530 | struct type * | |
b64f50a1 | 1531 | ctx_no_get_base_type (struct dwarf_expr_context *ctx, cu_offset die) |
523f3620 JK |
1532 | { |
1533 | error (_("Support for typed DWARF is not supported in this context")); | |
1534 | } | |
1535 | ||
8e3b41a9 JK |
1536 | /* Stub dwarf_expr_context_funcs.push_dwarf_block_entry_value |
1537 | implementation. */ | |
1538 | ||
1539 | void | |
1540 | ctx_no_push_dwarf_reg_entry_value (struct dwarf_expr_context *ctx, | |
24c5c679 JK |
1541 | enum call_site_parameter_kind kind, |
1542 | union call_site_parameter_u kind_u, | |
a471c594 | 1543 | int deref_size) |
8e3b41a9 JK |
1544 | { |
1545 | internal_error (__FILE__, __LINE__, | |
1546 | _("Support for DW_OP_GNU_entry_value is unimplemented")); | |
1547 | } | |
1548 | ||
3019eac3 DE |
1549 | /* Stub dwarf_expr_context_funcs.get_addr_index implementation. */ |
1550 | ||
1551 | CORE_ADDR | |
1552 | ctx_no_get_addr_index (void *baton, unsigned int index) | |
1553 | { | |
1554 | error (_("%s is invalid in this context"), "DW_OP_GNU_addr_index"); | |
1555 | } | |
1556 | ||
70221824 PA |
1557 | /* Provide a prototype to silence -Wmissing-prototypes. */ |
1558 | extern initialize_file_ftype _initialize_dwarf2expr; | |
1559 | ||
8a9b8146 TT |
1560 | void |
1561 | _initialize_dwarf2expr (void) | |
1562 | { | |
1563 | dwarf_arch_cookie | |
1564 | = gdbarch_data_register_post_init (dwarf_gdbarch_types_init); | |
4c2df51b | 1565 | } |