Commit | Line | Data |
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852483bc MK |
1 | /* DWARF 2 Expression Evaluator. |
2 | ||
ecd75fc8 | 3 | Copyright (C) 2001-2014 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" |
1e3a102a | 29 | #include "gdb_assert.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 | { | |
68 | struct dwarf_gdbarch_types *types = gdbarch_data (ctx->gdbarch, | |
69 | dwarf_arch_cookie); | |
70 | int ndx; | |
71 | ||
72 | if (ctx->addr_size == 2) | |
73 | ndx = 0; | |
74 | else if (ctx->addr_size == 4) | |
75 | ndx = 1; | |
76 | else if (ctx->addr_size == 8) | |
77 | ndx = 2; | |
78 | else | |
79 | error (_("Unsupported address size in DWARF expressions: %d bits"), | |
80 | 8 * ctx->addr_size); | |
81 | ||
82 | if (types->dw_types[ndx] == NULL) | |
83 | types->dw_types[ndx] | |
84 | = arch_integer_type (ctx->gdbarch, | |
85 | 8 * ctx->addr_size, | |
86 | 0, "<signed DWARF address type>"); | |
87 | ||
88 | return types->dw_types[ndx]; | |
89 | } | |
90 | ||
4c2df51b DJ |
91 | /* Create a new context for the expression evaluator. */ |
92 | ||
93 | struct dwarf_expr_context * | |
e4adbba9 | 94 | new_dwarf_expr_context (void) |
4c2df51b DJ |
95 | { |
96 | struct dwarf_expr_context *retval; | |
9a619af0 | 97 | |
4c2df51b | 98 | retval = xcalloc (1, sizeof (struct dwarf_expr_context)); |
18ec9831 KB |
99 | retval->stack_len = 0; |
100 | retval->stack_allocated = 10; | |
b966cb8a TT |
101 | retval->stack = xmalloc (retval->stack_allocated |
102 | * sizeof (struct dwarf_stack_value)); | |
87808bd6 JB |
103 | retval->num_pieces = 0; |
104 | retval->pieces = 0; | |
1e3a102a | 105 | retval->max_recursion_depth = 0x100; |
4c2df51b DJ |
106 | return retval; |
107 | } | |
108 | ||
109 | /* Release the memory allocated to CTX. */ | |
110 | ||
111 | void | |
112 | free_dwarf_expr_context (struct dwarf_expr_context *ctx) | |
113 | { | |
114 | xfree (ctx->stack); | |
87808bd6 | 115 | xfree (ctx->pieces); |
4c2df51b DJ |
116 | xfree (ctx); |
117 | } | |
118 | ||
4a227398 TT |
119 | /* Helper for make_cleanup_free_dwarf_expr_context. */ |
120 | ||
121 | static void | |
122 | free_dwarf_expr_context_cleanup (void *arg) | |
123 | { | |
124 | free_dwarf_expr_context (arg); | |
125 | } | |
126 | ||
127 | /* Return a cleanup that calls free_dwarf_expr_context. */ | |
128 | ||
129 | struct cleanup * | |
130 | make_cleanup_free_dwarf_expr_context (struct dwarf_expr_context *ctx) | |
131 | { | |
132 | return make_cleanup (free_dwarf_expr_context_cleanup, ctx); | |
133 | } | |
134 | ||
4c2df51b DJ |
135 | /* Expand the memory allocated to CTX's stack to contain at least |
136 | NEED more elements than are currently used. */ | |
137 | ||
138 | static void | |
139 | dwarf_expr_grow_stack (struct dwarf_expr_context *ctx, size_t need) | |
140 | { | |
141 | if (ctx->stack_len + need > ctx->stack_allocated) | |
142 | { | |
18ec9831 | 143 | size_t newlen = ctx->stack_len + need + 10; |
9a619af0 | 144 | |
4c2df51b | 145 | ctx->stack = xrealloc (ctx->stack, |
44353522 | 146 | newlen * sizeof (struct dwarf_stack_value)); |
18ec9831 | 147 | ctx->stack_allocated = newlen; |
4c2df51b DJ |
148 | } |
149 | } | |
150 | ||
151 | /* Push VALUE onto CTX's stack. */ | |
152 | ||
8a9b8146 TT |
153 | static void |
154 | dwarf_expr_push (struct dwarf_expr_context *ctx, struct value *value, | |
44353522 | 155 | int in_stack_memory) |
4c2df51b | 156 | { |
44353522 DE |
157 | struct dwarf_stack_value *v; |
158 | ||
4c2df51b | 159 | dwarf_expr_grow_stack (ctx, 1); |
44353522 DE |
160 | v = &ctx->stack[ctx->stack_len++]; |
161 | v->value = value; | |
162 | v->in_stack_memory = in_stack_memory; | |
4c2df51b DJ |
163 | } |
164 | ||
8a9b8146 | 165 | /* Push VALUE onto CTX's stack. */ |
4c2df51b DJ |
166 | |
167 | void | |
8a9b8146 TT |
168 | dwarf_expr_push_address (struct dwarf_expr_context *ctx, CORE_ADDR value, |
169 | int in_stack_memory) | |
170 | { | |
171 | dwarf_expr_push (ctx, | |
172 | value_from_ulongest (dwarf_expr_address_type (ctx), value), | |
173 | in_stack_memory); | |
174 | } | |
175 | ||
176 | /* Pop the top item off of CTX's stack. */ | |
177 | ||
178 | static void | |
4c2df51b DJ |
179 | dwarf_expr_pop (struct dwarf_expr_context *ctx) |
180 | { | |
181 | if (ctx->stack_len <= 0) | |
8a3fe4f8 | 182 | error (_("dwarf expression stack underflow")); |
4c2df51b DJ |
183 | ctx->stack_len--; |
184 | } | |
185 | ||
186 | /* Retrieve the N'th item on CTX's stack. */ | |
187 | ||
8a9b8146 | 188 | struct value * |
4c2df51b DJ |
189 | dwarf_expr_fetch (struct dwarf_expr_context *ctx, int n) |
190 | { | |
ef0fdf07 | 191 | if (ctx->stack_len <= n) |
3e43a32a MS |
192 | error (_("Asked for position %d of stack, " |
193 | "stack only has %d elements on it."), | |
4c2df51b | 194 | n, ctx->stack_len); |
44353522 | 195 | return ctx->stack[ctx->stack_len - (1 + n)].value; |
8a9b8146 TT |
196 | } |
197 | ||
198 | /* Require that TYPE be an integral type; throw an exception if not. */ | |
44353522 | 199 | |
8a9b8146 TT |
200 | static void |
201 | dwarf_require_integral (struct type *type) | |
202 | { | |
203 | if (TYPE_CODE (type) != TYPE_CODE_INT | |
204 | && TYPE_CODE (type) != TYPE_CODE_CHAR | |
205 | && TYPE_CODE (type) != TYPE_CODE_BOOL) | |
206 | error (_("integral type expected in DWARF expression")); | |
207 | } | |
208 | ||
209 | /* Return the unsigned form of TYPE. TYPE is necessarily an integral | |
210 | type. */ | |
211 | ||
212 | static struct type * | |
213 | get_unsigned_type (struct gdbarch *gdbarch, struct type *type) | |
214 | { | |
215 | switch (TYPE_LENGTH (type)) | |
216 | { | |
217 | case 1: | |
218 | return builtin_type (gdbarch)->builtin_uint8; | |
219 | case 2: | |
220 | return builtin_type (gdbarch)->builtin_uint16; | |
221 | case 4: | |
222 | return builtin_type (gdbarch)->builtin_uint32; | |
223 | case 8: | |
224 | return builtin_type (gdbarch)->builtin_uint64; | |
225 | default: | |
226 | error (_("no unsigned variant found for type, while evaluating " | |
227 | "DWARF expression")); | |
228 | } | |
44353522 DE |
229 | } |
230 | ||
8ddd9a20 TT |
231 | /* Return the signed form of TYPE. TYPE is necessarily an integral |
232 | type. */ | |
233 | ||
234 | static struct type * | |
235 | get_signed_type (struct gdbarch *gdbarch, struct type *type) | |
236 | { | |
237 | switch (TYPE_LENGTH (type)) | |
238 | { | |
239 | case 1: | |
240 | return builtin_type (gdbarch)->builtin_int8; | |
241 | case 2: | |
242 | return builtin_type (gdbarch)->builtin_int16; | |
243 | case 4: | |
244 | return builtin_type (gdbarch)->builtin_int32; | |
245 | case 8: | |
246 | return builtin_type (gdbarch)->builtin_int64; | |
247 | default: | |
248 | error (_("no signed variant found for type, while evaluating " | |
249 | "DWARF expression")); | |
250 | } | |
251 | } | |
252 | ||
f2c7657e UW |
253 | /* Retrieve the N'th item on CTX's stack, converted to an address. */ |
254 | ||
255 | CORE_ADDR | |
256 | dwarf_expr_fetch_address (struct dwarf_expr_context *ctx, int n) | |
257 | { | |
8a9b8146 TT |
258 | struct value *result_val = dwarf_expr_fetch (ctx, n); |
259 | enum bfd_endian byte_order = gdbarch_byte_order (ctx->gdbarch); | |
260 | ULONGEST result; | |
261 | ||
262 | dwarf_require_integral (value_type (result_val)); | |
263 | result = extract_unsigned_integer (value_contents (result_val), | |
264 | TYPE_LENGTH (value_type (result_val)), | |
265 | byte_order); | |
f2c7657e UW |
266 | |
267 | /* For most architectures, calling extract_unsigned_integer() alone | |
268 | is sufficient for extracting an address. However, some | |
269 | architectures (e.g. MIPS) use signed addresses and using | |
270 | extract_unsigned_integer() will not produce a correct | |
271 | result. Make sure we invoke gdbarch_integer_to_address() | |
272 | for those architectures which require it. */ | |
273 | if (gdbarch_integer_to_address_p (ctx->gdbarch)) | |
274 | { | |
f2c7657e | 275 | gdb_byte *buf = alloca (ctx->addr_size); |
8a9b8146 TT |
276 | struct type *int_type = get_unsigned_type (ctx->gdbarch, |
277 | value_type (result_val)); | |
f2c7657e UW |
278 | |
279 | store_unsigned_integer (buf, ctx->addr_size, byte_order, result); | |
280 | return gdbarch_integer_to_address (ctx->gdbarch, int_type, buf); | |
281 | } | |
282 | ||
283 | return (CORE_ADDR) result; | |
284 | } | |
285 | ||
44353522 DE |
286 | /* Retrieve the in_stack_memory flag of the N'th item on CTX's stack. */ |
287 | ||
288 | int | |
289 | dwarf_expr_fetch_in_stack_memory (struct dwarf_expr_context *ctx, int n) | |
290 | { | |
291 | if (ctx->stack_len <= n) | |
3e43a32a MS |
292 | error (_("Asked for position %d of stack, " |
293 | "stack only has %d elements on it."), | |
44353522 DE |
294 | n, ctx->stack_len); |
295 | return ctx->stack[ctx->stack_len - (1 + n)].in_stack_memory; | |
4c2df51b DJ |
296 | } |
297 | ||
cb826367 TT |
298 | /* Return true if the expression stack is empty. */ |
299 | ||
300 | static int | |
301 | dwarf_expr_stack_empty_p (struct dwarf_expr_context *ctx) | |
302 | { | |
303 | return ctx->stack_len == 0; | |
304 | } | |
305 | ||
87808bd6 JB |
306 | /* Add a new piece to CTX's piece list. */ |
307 | static void | |
d3b1e874 | 308 | add_piece (struct dwarf_expr_context *ctx, ULONGEST size, ULONGEST offset) |
87808bd6 JB |
309 | { |
310 | struct dwarf_expr_piece *p; | |
311 | ||
312 | ctx->num_pieces++; | |
313 | ||
d3b1e874 TT |
314 | ctx->pieces = xrealloc (ctx->pieces, |
315 | (ctx->num_pieces | |
316 | * sizeof (struct dwarf_expr_piece))); | |
87808bd6 JB |
317 | |
318 | p = &ctx->pieces[ctx->num_pieces - 1]; | |
cec03d70 | 319 | p->location = ctx->location; |
87808bd6 | 320 | p->size = size; |
d3b1e874 TT |
321 | p->offset = offset; |
322 | ||
cec03d70 TT |
323 | if (p->location == DWARF_VALUE_LITERAL) |
324 | { | |
325 | p->v.literal.data = ctx->data; | |
326 | p->v.literal.length = ctx->len; | |
327 | } | |
cb826367 TT |
328 | else if (dwarf_expr_stack_empty_p (ctx)) |
329 | { | |
330 | p->location = DWARF_VALUE_OPTIMIZED_OUT; | |
331 | /* Also reset the context's location, for our callers. This is | |
332 | a somewhat strange approach, but this lets us avoid setting | |
333 | the location to DWARF_VALUE_MEMORY in all the individual | |
334 | cases in the evaluator. */ | |
335 | ctx->location = DWARF_VALUE_OPTIMIZED_OUT; | |
336 | } | |
f2c7657e UW |
337 | else if (p->location == DWARF_VALUE_MEMORY) |
338 | { | |
339 | p->v.mem.addr = dwarf_expr_fetch_address (ctx, 0); | |
340 | p->v.mem.in_stack_memory = dwarf_expr_fetch_in_stack_memory (ctx, 0); | |
341 | } | |
8cf6f0b1 TT |
342 | else if (p->location == DWARF_VALUE_IMPLICIT_POINTER) |
343 | { | |
8b9737bf | 344 | p->v.ptr.die.sect_off = ctx->len; |
8a9b8146 | 345 | p->v.ptr.offset = value_as_long (dwarf_expr_fetch (ctx, 0)); |
8cf6f0b1 | 346 | } |
8a9b8146 TT |
347 | else if (p->location == DWARF_VALUE_REGISTER) |
348 | p->v.regno = value_as_long (dwarf_expr_fetch (ctx, 0)); | |
cec03d70 | 349 | else |
44353522 | 350 | { |
f2c7657e | 351 | p->v.value = dwarf_expr_fetch (ctx, 0); |
44353522 | 352 | } |
87808bd6 JB |
353 | } |
354 | ||
4c2df51b DJ |
355 | /* Evaluate the expression at ADDR (LEN bytes long) using the context |
356 | CTX. */ | |
357 | ||
358 | void | |
0d45f56e TT |
359 | dwarf_expr_eval (struct dwarf_expr_context *ctx, const gdb_byte *addr, |
360 | size_t len) | |
4c2df51b | 361 | { |
1e3a102a JK |
362 | int old_recursion_depth = ctx->recursion_depth; |
363 | ||
4c2df51b | 364 | execute_stack_op (ctx, addr, addr + len); |
1e3a102a JK |
365 | |
366 | /* CTX RECURSION_DEPTH becomes invalid if an exception was thrown here. */ | |
367 | ||
368 | gdb_assert (ctx->recursion_depth == old_recursion_depth); | |
4c2df51b DJ |
369 | } |
370 | ||
f664829e | 371 | /* Helper to read a uleb128 value or throw an error. */ |
4c2df51b | 372 | |
0d45f56e | 373 | const gdb_byte * |
f664829e | 374 | safe_read_uleb128 (const gdb_byte *buf, const gdb_byte *buf_end, |
9fccedf7 | 375 | uint64_t *r) |
4c2df51b | 376 | { |
f664829e DE |
377 | buf = gdb_read_uleb128 (buf, buf_end, r); |
378 | if (buf == NULL) | |
379 | error (_("DWARF expression error: ran off end of buffer reading uleb128 value")); | |
4c2df51b DJ |
380 | return buf; |
381 | } | |
382 | ||
f664829e | 383 | /* Helper to read a sleb128 value or throw an error. */ |
4c2df51b | 384 | |
0d45f56e | 385 | const gdb_byte * |
f664829e | 386 | safe_read_sleb128 (const gdb_byte *buf, const gdb_byte *buf_end, |
9fccedf7 | 387 | int64_t *r) |
4c2df51b | 388 | { |
f664829e DE |
389 | buf = gdb_read_sleb128 (buf, buf_end, r); |
390 | if (buf == NULL) | |
391 | error (_("DWARF expression error: ran off end of buffer reading sleb128 value")); | |
392 | return buf; | |
393 | } | |
4c2df51b | 394 | |
f664829e DE |
395 | const gdb_byte * |
396 | safe_skip_leb128 (const gdb_byte *buf, const gdb_byte *buf_end) | |
397 | { | |
398 | buf = gdb_skip_leb128 (buf, buf_end); | |
399 | if (buf == NULL) | |
400 | error (_("DWARF expression error: ran off end of buffer reading leb128 value")); | |
4c2df51b DJ |
401 | return buf; |
402 | } | |
4c2df51b | 403 | \f |
cec03d70 TT |
404 | |
405 | /* Check that the current operator is either at the end of an | |
406 | expression, or that it is followed by a composition operator. */ | |
407 | ||
3cf03773 TT |
408 | void |
409 | dwarf_expr_require_composition (const gdb_byte *op_ptr, const gdb_byte *op_end, | |
410 | const char *op_name) | |
cec03d70 TT |
411 | { |
412 | /* It seems like DW_OP_GNU_uninit should be handled here. However, | |
413 | it doesn't seem to make sense for DW_OP_*_value, and it was not | |
414 | checked at the other place that this function is called. */ | |
415 | if (op_ptr != op_end && *op_ptr != DW_OP_piece && *op_ptr != DW_OP_bit_piece) | |
416 | error (_("DWARF-2 expression error: `%s' operations must be " | |
64b9b334 | 417 | "used either alone or in conjunction with DW_OP_piece " |
cec03d70 TT |
418 | "or DW_OP_bit_piece."), |
419 | op_name); | |
420 | } | |
421 | ||
8a9b8146 TT |
422 | /* Return true iff the types T1 and T2 are "the same". This only does |
423 | checks that might reasonably be needed to compare DWARF base | |
424 | types. */ | |
425 | ||
426 | static int | |
427 | base_types_equal_p (struct type *t1, struct type *t2) | |
428 | { | |
429 | if (TYPE_CODE (t1) != TYPE_CODE (t2)) | |
430 | return 0; | |
431 | if (TYPE_UNSIGNED (t1) != TYPE_UNSIGNED (t2)) | |
432 | return 0; | |
433 | return TYPE_LENGTH (t1) == TYPE_LENGTH (t2); | |
434 | } | |
435 | ||
436 | /* A convenience function to call get_base_type on CTX and return the | |
437 | result. DIE is the DIE whose type we need. SIZE is non-zero if | |
438 | this function should verify that the resulting type has the correct | |
439 | size. */ | |
440 | ||
441 | static struct type * | |
b64f50a1 | 442 | dwarf_get_base_type (struct dwarf_expr_context *ctx, cu_offset die, int size) |
8a9b8146 TT |
443 | { |
444 | struct type *result; | |
445 | ||
9e8b7a03 | 446 | if (ctx->funcs->get_base_type) |
8a9b8146 | 447 | { |
9e8b7a03 | 448 | result = ctx->funcs->get_base_type (ctx, die); |
9ff3b74f TT |
449 | if (result == NULL) |
450 | error (_("Could not find type for DW_OP_GNU_const_type")); | |
8a9b8146 TT |
451 | if (size != 0 && TYPE_LENGTH (result) != size) |
452 | error (_("DW_OP_GNU_const_type has different sizes for type and data")); | |
453 | } | |
454 | else | |
455 | /* Anything will do. */ | |
456 | result = builtin_type (ctx->gdbarch)->builtin_int; | |
457 | ||
458 | return result; | |
459 | } | |
460 | ||
8e3b41a9 JK |
461 | /* If <BUF..BUF_END] contains DW_FORM_block* with single DW_OP_reg* return the |
462 | DWARF register number. Otherwise return -1. */ | |
463 | ||
464 | int | |
465 | dwarf_block_to_dwarf_reg (const gdb_byte *buf, const gdb_byte *buf_end) | |
466 | { | |
9fccedf7 | 467 | uint64_t dwarf_reg; |
8e3b41a9 JK |
468 | |
469 | if (buf_end <= buf) | |
470 | return -1; | |
471 | if (*buf >= DW_OP_reg0 && *buf <= DW_OP_reg31) | |
472 | { | |
473 | if (buf_end - buf != 1) | |
474 | return -1; | |
475 | return *buf - DW_OP_reg0; | |
476 | } | |
477 | ||
478 | if (*buf == DW_OP_GNU_regval_type) | |
479 | { | |
480 | buf++; | |
f664829e DE |
481 | buf = gdb_read_uleb128 (buf, buf_end, &dwarf_reg); |
482 | if (buf == NULL) | |
483 | return -1; | |
484 | buf = gdb_skip_leb128 (buf, buf_end); | |
485 | if (buf == NULL) | |
486 | return -1; | |
8e3b41a9 JK |
487 | } |
488 | else if (*buf == DW_OP_regx) | |
489 | { | |
490 | buf++; | |
f664829e DE |
491 | buf = gdb_read_uleb128 (buf, buf_end, &dwarf_reg); |
492 | if (buf == NULL) | |
493 | return -1; | |
8e3b41a9 JK |
494 | } |
495 | else | |
496 | return -1; | |
497 | if (buf != buf_end || (int) dwarf_reg != dwarf_reg) | |
498 | return -1; | |
499 | return dwarf_reg; | |
500 | } | |
501 | ||
a471c594 JK |
502 | /* If <BUF..BUF_END] contains DW_FORM_block* with just DW_OP_breg*(0) and |
503 | DW_OP_deref* return the DWARF register number. Otherwise return -1. | |
504 | DEREF_SIZE_RETURN contains -1 for DW_OP_deref; otherwise it contains the | |
505 | size from DW_OP_deref_size. */ | |
506 | ||
507 | int | |
508 | dwarf_block_to_dwarf_reg_deref (const gdb_byte *buf, const gdb_byte *buf_end, | |
509 | CORE_ADDR *deref_size_return) | |
510 | { | |
9fccedf7 DE |
511 | uint64_t dwarf_reg; |
512 | int64_t offset; | |
a471c594 JK |
513 | |
514 | if (buf_end <= buf) | |
515 | return -1; | |
f664829e | 516 | |
a471c594 JK |
517 | if (*buf >= DW_OP_breg0 && *buf <= DW_OP_breg31) |
518 | { | |
519 | dwarf_reg = *buf - DW_OP_breg0; | |
520 | buf++; | |
f664829e DE |
521 | if (buf >= buf_end) |
522 | return -1; | |
a471c594 JK |
523 | } |
524 | else if (*buf == DW_OP_bregx) | |
525 | { | |
526 | buf++; | |
f664829e DE |
527 | buf = gdb_read_uleb128 (buf, buf_end, &dwarf_reg); |
528 | if (buf == NULL) | |
529 | return -1; | |
a471c594 JK |
530 | if ((int) dwarf_reg != dwarf_reg) |
531 | return -1; | |
532 | } | |
533 | else | |
534 | return -1; | |
535 | ||
f664829e DE |
536 | buf = gdb_read_sleb128 (buf, buf_end, &offset); |
537 | if (buf == NULL) | |
a471c594 | 538 | return -1; |
f664829e | 539 | if (offset != 0) |
a471c594 JK |
540 | return -1; |
541 | ||
542 | if (*buf == DW_OP_deref) | |
543 | { | |
544 | buf++; | |
545 | *deref_size_return = -1; | |
546 | } | |
547 | else if (*buf == DW_OP_deref_size) | |
548 | { | |
549 | buf++; | |
550 | if (buf >= buf_end) | |
551 | return -1; | |
552 | *deref_size_return = *buf++; | |
553 | } | |
554 | else | |
555 | return -1; | |
556 | ||
557 | if (buf != buf_end) | |
558 | return -1; | |
559 | ||
560 | return dwarf_reg; | |
561 | } | |
562 | ||
e18b2753 JK |
563 | /* If <BUF..BUF_END] contains DW_FORM_block* with single DW_OP_fbreg(X) fill |
564 | in FB_OFFSET_RETURN with the X offset and return 1. Otherwise return 0. */ | |
565 | ||
566 | int | |
567 | dwarf_block_to_fb_offset (const gdb_byte *buf, const gdb_byte *buf_end, | |
568 | CORE_ADDR *fb_offset_return) | |
569 | { | |
9fccedf7 | 570 | int64_t fb_offset; |
e18b2753 JK |
571 | |
572 | if (buf_end <= buf) | |
573 | return 0; | |
574 | ||
575 | if (*buf != DW_OP_fbreg) | |
576 | return 0; | |
577 | buf++; | |
578 | ||
f664829e DE |
579 | buf = gdb_read_sleb128 (buf, buf_end, &fb_offset); |
580 | if (buf == NULL) | |
581 | return 0; | |
e18b2753 JK |
582 | *fb_offset_return = fb_offset; |
583 | if (buf != buf_end || fb_offset != (LONGEST) *fb_offset_return) | |
584 | return 0; | |
585 | ||
586 | return 1; | |
587 | } | |
588 | ||
589 | /* If <BUF..BUF_END] contains DW_FORM_block* with single DW_OP_bregSP(X) fill | |
590 | in SP_OFFSET_RETURN with the X offset and return 1. Otherwise return 0. | |
591 | The matched SP register number depends on GDBARCH. */ | |
592 | ||
593 | int | |
594 | dwarf_block_to_sp_offset (struct gdbarch *gdbarch, const gdb_byte *buf, | |
595 | const gdb_byte *buf_end, CORE_ADDR *sp_offset_return) | |
596 | { | |
9fccedf7 DE |
597 | uint64_t dwarf_reg; |
598 | int64_t sp_offset; | |
e18b2753 JK |
599 | |
600 | if (buf_end <= buf) | |
601 | return 0; | |
602 | if (*buf >= DW_OP_breg0 && *buf <= DW_OP_breg31) | |
603 | { | |
604 | dwarf_reg = *buf - DW_OP_breg0; | |
605 | buf++; | |
606 | } | |
607 | else | |
608 | { | |
609 | if (*buf != DW_OP_bregx) | |
610 | return 0; | |
611 | buf++; | |
f664829e DE |
612 | buf = gdb_read_uleb128 (buf, buf_end, &dwarf_reg); |
613 | if (buf == NULL) | |
614 | return 0; | |
e18b2753 JK |
615 | } |
616 | ||
617 | if (gdbarch_dwarf2_reg_to_regnum (gdbarch, dwarf_reg) | |
618 | != gdbarch_sp_regnum (gdbarch)) | |
619 | return 0; | |
620 | ||
f664829e DE |
621 | buf = gdb_read_sleb128 (buf, buf_end, &sp_offset); |
622 | if (buf == NULL) | |
623 | return 0; | |
e18b2753 JK |
624 | *sp_offset_return = sp_offset; |
625 | if (buf != buf_end || sp_offset != (LONGEST) *sp_offset_return) | |
626 | return 0; | |
627 | ||
628 | return 1; | |
629 | } | |
630 | ||
4c2df51b DJ |
631 | /* The engine for the expression evaluator. Using the context in CTX, |
632 | evaluate the expression between OP_PTR and OP_END. */ | |
633 | ||
634 | static void | |
852483bc | 635 | execute_stack_op (struct dwarf_expr_context *ctx, |
0d45f56e | 636 | const gdb_byte *op_ptr, const gdb_byte *op_end) |
4c2df51b | 637 | { |
e17a4113 | 638 | enum bfd_endian byte_order = gdbarch_byte_order (ctx->gdbarch); |
8a9b8146 TT |
639 | /* Old-style "untyped" DWARF values need special treatment in a |
640 | couple of places, specifically DW_OP_mod and DW_OP_shr. We need | |
641 | a special type for these values so we can distinguish them from | |
642 | values that have an explicit type, because explicitly-typed | |
643 | values do not need special treatment. This special type must be | |
644 | different (in the `==' sense) from any base type coming from the | |
645 | CU. */ | |
646 | struct type *address_type = dwarf_expr_address_type (ctx); | |
9a619af0 | 647 | |
cec03d70 | 648 | ctx->location = DWARF_VALUE_MEMORY; |
42be36b3 | 649 | ctx->initialized = 1; /* Default is initialized. */ |
18ec9831 | 650 | |
1e3a102a JK |
651 | if (ctx->recursion_depth > ctx->max_recursion_depth) |
652 | error (_("DWARF-2 expression error: Loop detected (%d)."), | |
653 | ctx->recursion_depth); | |
654 | ctx->recursion_depth++; | |
655 | ||
4c2df51b DJ |
656 | while (op_ptr < op_end) |
657 | { | |
658 | enum dwarf_location_atom op = *op_ptr++; | |
f2c7657e | 659 | ULONGEST result; |
44353522 DE |
660 | /* Assume the value is not in stack memory. |
661 | Code that knows otherwise sets this to 1. | |
662 | Some arithmetic on stack addresses can probably be assumed to still | |
663 | be a stack address, but we skip this complication for now. | |
664 | This is just an optimization, so it's always ok to punt | |
665 | and leave this as 0. */ | |
666 | int in_stack_memory = 0; | |
9fccedf7 DE |
667 | uint64_t uoffset, reg; |
668 | int64_t offset; | |
8a9b8146 | 669 | struct value *result_val = NULL; |
4c2df51b | 670 | |
e0e9434c TT |
671 | /* The DWARF expression might have a bug causing an infinite |
672 | loop. In that case, quitting is the only way out. */ | |
673 | QUIT; | |
674 | ||
4c2df51b DJ |
675 | switch (op) |
676 | { | |
677 | case DW_OP_lit0: | |
678 | case DW_OP_lit1: | |
679 | case DW_OP_lit2: | |
680 | case DW_OP_lit3: | |
681 | case DW_OP_lit4: | |
682 | case DW_OP_lit5: | |
683 | case DW_OP_lit6: | |
684 | case DW_OP_lit7: | |
685 | case DW_OP_lit8: | |
686 | case DW_OP_lit9: | |
687 | case DW_OP_lit10: | |
688 | case DW_OP_lit11: | |
689 | case DW_OP_lit12: | |
690 | case DW_OP_lit13: | |
691 | case DW_OP_lit14: | |
692 | case DW_OP_lit15: | |
693 | case DW_OP_lit16: | |
694 | case DW_OP_lit17: | |
695 | case DW_OP_lit18: | |
696 | case DW_OP_lit19: | |
697 | case DW_OP_lit20: | |
698 | case DW_OP_lit21: | |
699 | case DW_OP_lit22: | |
700 | case DW_OP_lit23: | |
701 | case DW_OP_lit24: | |
702 | case DW_OP_lit25: | |
703 | case DW_OP_lit26: | |
704 | case DW_OP_lit27: | |
705 | case DW_OP_lit28: | |
706 | case DW_OP_lit29: | |
707 | case DW_OP_lit30: | |
708 | case DW_OP_lit31: | |
709 | result = op - DW_OP_lit0; | |
8a9b8146 | 710 | result_val = value_from_ulongest (address_type, result); |
4c2df51b DJ |
711 | break; |
712 | ||
713 | case DW_OP_addr: | |
f2c7657e UW |
714 | result = extract_unsigned_integer (op_ptr, |
715 | ctx->addr_size, byte_order); | |
ae0d2f24 | 716 | op_ptr += ctx->addr_size; |
ac56253d TT |
717 | /* Some versions of GCC emit DW_OP_addr before |
718 | DW_OP_GNU_push_tls_address. In this case the value is an | |
719 | index, not an address. We don't support things like | |
720 | branching between the address and the TLS op. */ | |
721 | if (op_ptr >= op_end || *op_ptr != DW_OP_GNU_push_tls_address) | |
722 | result += ctx->offset; | |
8a9b8146 | 723 | result_val = value_from_ulongest (address_type, result); |
4c2df51b DJ |
724 | break; |
725 | ||
3019eac3 | 726 | case DW_OP_GNU_addr_index: |
49f6c839 DE |
727 | op_ptr = safe_read_uleb128 (op_ptr, op_end, &uoffset); |
728 | result = (ctx->funcs->get_addr_index) (ctx->baton, uoffset); | |
729 | result += ctx->offset; | |
730 | result_val = value_from_ulongest (address_type, result); | |
731 | break; | |
732 | case DW_OP_GNU_const_index: | |
f664829e | 733 | op_ptr = safe_read_uleb128 (op_ptr, op_end, &uoffset); |
3019eac3 DE |
734 | result = (ctx->funcs->get_addr_index) (ctx->baton, uoffset); |
735 | result_val = value_from_ulongest (address_type, result); | |
736 | break; | |
737 | ||
4c2df51b | 738 | case DW_OP_const1u: |
e17a4113 | 739 | result = extract_unsigned_integer (op_ptr, 1, byte_order); |
8a9b8146 | 740 | result_val = value_from_ulongest (address_type, result); |
4c2df51b DJ |
741 | op_ptr += 1; |
742 | break; | |
743 | case DW_OP_const1s: | |
e17a4113 | 744 | result = extract_signed_integer (op_ptr, 1, byte_order); |
8a9b8146 | 745 | result_val = value_from_ulongest (address_type, result); |
4c2df51b DJ |
746 | op_ptr += 1; |
747 | break; | |
748 | case DW_OP_const2u: | |
e17a4113 | 749 | result = extract_unsigned_integer (op_ptr, 2, byte_order); |
8a9b8146 | 750 | result_val = value_from_ulongest (address_type, result); |
4c2df51b DJ |
751 | op_ptr += 2; |
752 | break; | |
753 | case DW_OP_const2s: | |
e17a4113 | 754 | result = extract_signed_integer (op_ptr, 2, byte_order); |
8a9b8146 | 755 | result_val = value_from_ulongest (address_type, result); |
4c2df51b DJ |
756 | op_ptr += 2; |
757 | break; | |
758 | case DW_OP_const4u: | |
e17a4113 | 759 | result = extract_unsigned_integer (op_ptr, 4, byte_order); |
8a9b8146 | 760 | result_val = value_from_ulongest (address_type, result); |
4c2df51b DJ |
761 | op_ptr += 4; |
762 | break; | |
763 | case DW_OP_const4s: | |
e17a4113 | 764 | result = extract_signed_integer (op_ptr, 4, byte_order); |
8a9b8146 | 765 | result_val = value_from_ulongest (address_type, result); |
4c2df51b DJ |
766 | op_ptr += 4; |
767 | break; | |
768 | case DW_OP_const8u: | |
e17a4113 | 769 | result = extract_unsigned_integer (op_ptr, 8, byte_order); |
8a9b8146 | 770 | result_val = value_from_ulongest (address_type, result); |
4c2df51b DJ |
771 | op_ptr += 8; |
772 | break; | |
773 | case DW_OP_const8s: | |
e17a4113 | 774 | result = extract_signed_integer (op_ptr, 8, byte_order); |
8a9b8146 | 775 | result_val = value_from_ulongest (address_type, result); |
4c2df51b DJ |
776 | op_ptr += 8; |
777 | break; | |
778 | case DW_OP_constu: | |
f664829e | 779 | op_ptr = safe_read_uleb128 (op_ptr, op_end, &uoffset); |
4c2df51b | 780 | result = uoffset; |
8a9b8146 | 781 | result_val = value_from_ulongest (address_type, result); |
4c2df51b DJ |
782 | break; |
783 | case DW_OP_consts: | |
f664829e | 784 | op_ptr = safe_read_sleb128 (op_ptr, op_end, &offset); |
4c2df51b | 785 | result = offset; |
8a9b8146 | 786 | result_val = value_from_ulongest (address_type, result); |
4c2df51b DJ |
787 | break; |
788 | ||
789 | /* The DW_OP_reg operations are required to occur alone in | |
790 | location expressions. */ | |
791 | case DW_OP_reg0: | |
792 | case DW_OP_reg1: | |
793 | case DW_OP_reg2: | |
794 | case DW_OP_reg3: | |
795 | case DW_OP_reg4: | |
796 | case DW_OP_reg5: | |
797 | case DW_OP_reg6: | |
798 | case DW_OP_reg7: | |
799 | case DW_OP_reg8: | |
800 | case DW_OP_reg9: | |
801 | case DW_OP_reg10: | |
802 | case DW_OP_reg11: | |
803 | case DW_OP_reg12: | |
804 | case DW_OP_reg13: | |
805 | case DW_OP_reg14: | |
806 | case DW_OP_reg15: | |
807 | case DW_OP_reg16: | |
808 | case DW_OP_reg17: | |
809 | case DW_OP_reg18: | |
810 | case DW_OP_reg19: | |
811 | case DW_OP_reg20: | |
812 | case DW_OP_reg21: | |
813 | case DW_OP_reg22: | |
814 | case DW_OP_reg23: | |
815 | case DW_OP_reg24: | |
816 | case DW_OP_reg25: | |
817 | case DW_OP_reg26: | |
818 | case DW_OP_reg27: | |
819 | case DW_OP_reg28: | |
820 | case DW_OP_reg29: | |
821 | case DW_OP_reg30: | |
822 | case DW_OP_reg31: | |
42be36b3 CT |
823 | if (op_ptr != op_end |
824 | && *op_ptr != DW_OP_piece | |
d3b1e874 | 825 | && *op_ptr != DW_OP_bit_piece |
42be36b3 | 826 | && *op_ptr != DW_OP_GNU_uninit) |
8a3fe4f8 | 827 | error (_("DWARF-2 expression error: DW_OP_reg operations must be " |
64b9b334 | 828 | "used either alone or in conjunction with DW_OP_piece " |
d3b1e874 | 829 | "or DW_OP_bit_piece.")); |
4c2df51b | 830 | |
61fbb938 | 831 | result = op - DW_OP_reg0; |
8a9b8146 | 832 | result_val = value_from_ulongest (address_type, result); |
cec03d70 | 833 | ctx->location = DWARF_VALUE_REGISTER; |
4c2df51b DJ |
834 | break; |
835 | ||
836 | case DW_OP_regx: | |
f664829e | 837 | op_ptr = safe_read_uleb128 (op_ptr, op_end, ®); |
3cf03773 | 838 | dwarf_expr_require_composition (op_ptr, op_end, "DW_OP_regx"); |
4c2df51b | 839 | |
61fbb938 | 840 | result = reg; |
8a9b8146 | 841 | result_val = value_from_ulongest (address_type, result); |
cec03d70 | 842 | ctx->location = DWARF_VALUE_REGISTER; |
4c2df51b DJ |
843 | break; |
844 | ||
cec03d70 TT |
845 | case DW_OP_implicit_value: |
846 | { | |
9fccedf7 | 847 | uint64_t len; |
9a619af0 | 848 | |
f664829e | 849 | op_ptr = safe_read_uleb128 (op_ptr, op_end, &len); |
cec03d70 TT |
850 | if (op_ptr + len > op_end) |
851 | error (_("DW_OP_implicit_value: too few bytes available.")); | |
852 | ctx->len = len; | |
853 | ctx->data = op_ptr; | |
854 | ctx->location = DWARF_VALUE_LITERAL; | |
855 | op_ptr += len; | |
3cf03773 TT |
856 | dwarf_expr_require_composition (op_ptr, op_end, |
857 | "DW_OP_implicit_value"); | |
cec03d70 TT |
858 | } |
859 | goto no_push; | |
860 | ||
861 | case DW_OP_stack_value: | |
862 | ctx->location = DWARF_VALUE_STACK; | |
3cf03773 | 863 | dwarf_expr_require_composition (op_ptr, op_end, "DW_OP_stack_value"); |
cec03d70 TT |
864 | goto no_push; |
865 | ||
8cf6f0b1 TT |
866 | case DW_OP_GNU_implicit_pointer: |
867 | { | |
9fccedf7 | 868 | int64_t len; |
8cf6f0b1 | 869 | |
181cebd4 JK |
870 | if (ctx->ref_addr_size == -1) |
871 | error (_("DWARF-2 expression error: DW_OP_GNU_implicit_pointer " | |
872 | "is not allowed in frame context")); | |
873 | ||
8b9737bf | 874 | /* The referred-to DIE of sect_offset kind. */ |
181cebd4 | 875 | ctx->len = extract_unsigned_integer (op_ptr, ctx->ref_addr_size, |
8cf6f0b1 | 876 | byte_order); |
181cebd4 | 877 | op_ptr += ctx->ref_addr_size; |
8cf6f0b1 TT |
878 | |
879 | /* The byte offset into the data. */ | |
f664829e | 880 | op_ptr = safe_read_sleb128 (op_ptr, op_end, &len); |
8cf6f0b1 | 881 | result = (ULONGEST) len; |
8a9b8146 | 882 | result_val = value_from_ulongest (address_type, result); |
8cf6f0b1 TT |
883 | |
884 | ctx->location = DWARF_VALUE_IMPLICIT_POINTER; | |
885 | dwarf_expr_require_composition (op_ptr, op_end, | |
886 | "DW_OP_GNU_implicit_pointer"); | |
887 | } | |
888 | break; | |
889 | ||
4c2df51b DJ |
890 | case DW_OP_breg0: |
891 | case DW_OP_breg1: | |
892 | case DW_OP_breg2: | |
893 | case DW_OP_breg3: | |
894 | case DW_OP_breg4: | |
895 | case DW_OP_breg5: | |
896 | case DW_OP_breg6: | |
897 | case DW_OP_breg7: | |
898 | case DW_OP_breg8: | |
899 | case DW_OP_breg9: | |
900 | case DW_OP_breg10: | |
901 | case DW_OP_breg11: | |
902 | case DW_OP_breg12: | |
903 | case DW_OP_breg13: | |
904 | case DW_OP_breg14: | |
905 | case DW_OP_breg15: | |
906 | case DW_OP_breg16: | |
907 | case DW_OP_breg17: | |
908 | case DW_OP_breg18: | |
909 | case DW_OP_breg19: | |
910 | case DW_OP_breg20: | |
911 | case DW_OP_breg21: | |
912 | case DW_OP_breg22: | |
913 | case DW_OP_breg23: | |
914 | case DW_OP_breg24: | |
915 | case DW_OP_breg25: | |
916 | case DW_OP_breg26: | |
917 | case DW_OP_breg27: | |
918 | case DW_OP_breg28: | |
919 | case DW_OP_breg29: | |
920 | case DW_OP_breg30: | |
921 | case DW_OP_breg31: | |
922 | { | |
f664829e | 923 | op_ptr = safe_read_sleb128 (op_ptr, op_end, &offset); |
b1370418 JB |
924 | result = (ctx->funcs->read_addr_from_reg) (ctx->baton, |
925 | op - DW_OP_breg0); | |
4c2df51b | 926 | result += offset; |
8a9b8146 | 927 | result_val = value_from_ulongest (address_type, result); |
4c2df51b DJ |
928 | } |
929 | break; | |
930 | case DW_OP_bregx: | |
931 | { | |
f664829e DE |
932 | op_ptr = safe_read_uleb128 (op_ptr, op_end, ®); |
933 | op_ptr = safe_read_sleb128 (op_ptr, op_end, &offset); | |
b1370418 | 934 | result = (ctx->funcs->read_addr_from_reg) (ctx->baton, reg); |
4c2df51b | 935 | result += offset; |
8a9b8146 | 936 | result_val = value_from_ulongest (address_type, result); |
4c2df51b DJ |
937 | } |
938 | break; | |
939 | case DW_OP_fbreg: | |
940 | { | |
0d45f56e | 941 | const gdb_byte *datastart; |
4c2df51b DJ |
942 | size_t datalen; |
943 | unsigned int before_stack_len; | |
944 | ||
f664829e | 945 | op_ptr = safe_read_sleb128 (op_ptr, op_end, &offset); |
4c2df51b DJ |
946 | /* Rather than create a whole new context, we simply |
947 | record the stack length before execution, then reset it | |
948 | afterwards, effectively erasing whatever the recursive | |
949 | call put there. */ | |
950 | before_stack_len = ctx->stack_len; | |
da62e633 AC |
951 | /* FIXME: cagney/2003-03-26: This code should be using |
952 | get_frame_base_address(), and then implement a dwarf2 | |
953 | specific this_base method. */ | |
9e8b7a03 | 954 | (ctx->funcs->get_frame_base) (ctx->baton, &datastart, &datalen); |
4c2df51b | 955 | dwarf_expr_eval (ctx, datastart, datalen); |
f2c7657e UW |
956 | if (ctx->location == DWARF_VALUE_MEMORY) |
957 | result = dwarf_expr_fetch_address (ctx, 0); | |
958 | else if (ctx->location == DWARF_VALUE_REGISTER) | |
b1370418 JB |
959 | result = (ctx->funcs->read_addr_from_reg) |
960 | (ctx->baton, | |
961 | value_as_long (dwarf_expr_fetch (ctx, 0))); | |
f2c7657e | 962 | else |
3e43a32a MS |
963 | error (_("Not implemented: computing frame " |
964 | "base using explicit value operator")); | |
4c2df51b | 965 | result = result + offset; |
8a9b8146 | 966 | result_val = value_from_ulongest (address_type, result); |
44353522 | 967 | in_stack_memory = 1; |
4c2df51b | 968 | ctx->stack_len = before_stack_len; |
cec03d70 | 969 | ctx->location = DWARF_VALUE_MEMORY; |
4c2df51b DJ |
970 | } |
971 | break; | |
44353522 | 972 | |
4c2df51b | 973 | case DW_OP_dup: |
8a9b8146 | 974 | result_val = dwarf_expr_fetch (ctx, 0); |
44353522 | 975 | in_stack_memory = dwarf_expr_fetch_in_stack_memory (ctx, 0); |
4c2df51b DJ |
976 | break; |
977 | ||
978 | case DW_OP_drop: | |
979 | dwarf_expr_pop (ctx); | |
980 | goto no_push; | |
981 | ||
982 | case DW_OP_pick: | |
983 | offset = *op_ptr++; | |
8a9b8146 | 984 | result_val = dwarf_expr_fetch (ctx, offset); |
44353522 | 985 | in_stack_memory = dwarf_expr_fetch_in_stack_memory (ctx, offset); |
4c2df51b | 986 | break; |
9f3fe11c TG |
987 | |
988 | case DW_OP_swap: | |
989 | { | |
44353522 | 990 | struct dwarf_stack_value t1, t2; |
9f3fe11c TG |
991 | |
992 | if (ctx->stack_len < 2) | |
3e43a32a | 993 | error (_("Not enough elements for " |
0963b4bd | 994 | "DW_OP_swap. Need 2, have %d."), |
9f3fe11c TG |
995 | ctx->stack_len); |
996 | t1 = ctx->stack[ctx->stack_len - 1]; | |
997 | t2 = ctx->stack[ctx->stack_len - 2]; | |
998 | ctx->stack[ctx->stack_len - 1] = t2; | |
999 | ctx->stack[ctx->stack_len - 2] = t1; | |
1000 | goto no_push; | |
1001 | } | |
4c2df51b DJ |
1002 | |
1003 | case DW_OP_over: | |
8a9b8146 | 1004 | result_val = dwarf_expr_fetch (ctx, 1); |
44353522 | 1005 | in_stack_memory = dwarf_expr_fetch_in_stack_memory (ctx, 1); |
4c2df51b DJ |
1006 | break; |
1007 | ||
1008 | case DW_OP_rot: | |
1009 | { | |
44353522 | 1010 | struct dwarf_stack_value t1, t2, t3; |
4c2df51b DJ |
1011 | |
1012 | if (ctx->stack_len < 3) | |
0963b4bd MS |
1013 | error (_("Not enough elements for " |
1014 | "DW_OP_rot. Need 3, have %d."), | |
4c2df51b DJ |
1015 | ctx->stack_len); |
1016 | t1 = ctx->stack[ctx->stack_len - 1]; | |
1017 | t2 = ctx->stack[ctx->stack_len - 2]; | |
1018 | t3 = ctx->stack[ctx->stack_len - 3]; | |
1019 | ctx->stack[ctx->stack_len - 1] = t2; | |
1020 | ctx->stack[ctx->stack_len - 2] = t3; | |
1021 | ctx->stack[ctx->stack_len - 3] = t1; | |
1022 | goto no_push; | |
1023 | } | |
1024 | ||
1025 | case DW_OP_deref: | |
1026 | case DW_OP_deref_size: | |
8a9b8146 | 1027 | case DW_OP_GNU_deref_type: |
f2c7657e UW |
1028 | { |
1029 | int addr_size = (op == DW_OP_deref ? ctx->addr_size : *op_ptr++); | |
1030 | gdb_byte *buf = alloca (addr_size); | |
1031 | CORE_ADDR addr = dwarf_expr_fetch_address (ctx, 0); | |
8a9b8146 TT |
1032 | struct type *type; |
1033 | ||
f2c7657e UW |
1034 | dwarf_expr_pop (ctx); |
1035 | ||
8a9b8146 TT |
1036 | if (op == DW_OP_GNU_deref_type) |
1037 | { | |
b64f50a1 | 1038 | cu_offset type_die; |
8a9b8146 | 1039 | |
f664829e | 1040 | op_ptr = safe_read_uleb128 (op_ptr, op_end, &uoffset); |
b64f50a1 | 1041 | type_die.cu_off = uoffset; |
8a9b8146 TT |
1042 | type = dwarf_get_base_type (ctx, type_die, 0); |
1043 | } | |
1044 | else | |
1045 | type = address_type; | |
1046 | ||
9e8b7a03 | 1047 | (ctx->funcs->read_mem) (ctx->baton, buf, addr, addr_size); |
325663dc JB |
1048 | |
1049 | /* If the size of the object read from memory is different | |
1050 | from the type length, we need to zero-extend it. */ | |
1051 | if (TYPE_LENGTH (type) != addr_size) | |
1052 | { | |
1053 | ULONGEST result = | |
1054 | extract_unsigned_integer (buf, addr_size, byte_order); | |
1055 | ||
1056 | buf = alloca (TYPE_LENGTH (type)); | |
1057 | store_unsigned_integer (buf, TYPE_LENGTH (type), | |
1058 | byte_order, result); | |
1059 | } | |
1060 | ||
8a9b8146 | 1061 | result_val = value_from_contents_and_address (type, buf, addr); |
f2c7657e UW |
1062 | break; |
1063 | } | |
1064 | ||
4c2df51b DJ |
1065 | case DW_OP_abs: |
1066 | case DW_OP_neg: | |
1067 | case DW_OP_not: | |
1068 | case DW_OP_plus_uconst: | |
8a9b8146 TT |
1069 | { |
1070 | /* Unary operations. */ | |
1071 | result_val = dwarf_expr_fetch (ctx, 0); | |
1072 | dwarf_expr_pop (ctx); | |
4c2df51b | 1073 | |
8a9b8146 TT |
1074 | switch (op) |
1075 | { | |
1076 | case DW_OP_abs: | |
1077 | if (value_less (result_val, | |
1078 | value_zero (value_type (result_val), not_lval))) | |
1079 | result_val = value_neg (result_val); | |
1080 | break; | |
1081 | case DW_OP_neg: | |
1082 | result_val = value_neg (result_val); | |
1083 | break; | |
1084 | case DW_OP_not: | |
1085 | dwarf_require_integral (value_type (result_val)); | |
1086 | result_val = value_complement (result_val); | |
1087 | break; | |
1088 | case DW_OP_plus_uconst: | |
1089 | dwarf_require_integral (value_type (result_val)); | |
1090 | result = value_as_long (result_val); | |
f664829e | 1091 | op_ptr = safe_read_uleb128 (op_ptr, op_end, ®); |
8a9b8146 TT |
1092 | result += reg; |
1093 | result_val = value_from_ulongest (address_type, result); | |
1094 | break; | |
1095 | } | |
1096 | } | |
4c2df51b DJ |
1097 | break; |
1098 | ||
1099 | case DW_OP_and: | |
1100 | case DW_OP_div: | |
1101 | case DW_OP_minus: | |
1102 | case DW_OP_mod: | |
1103 | case DW_OP_mul: | |
1104 | case DW_OP_or: | |
1105 | case DW_OP_plus: | |
1106 | case DW_OP_shl: | |
1107 | case DW_OP_shr: | |
1108 | case DW_OP_shra: | |
1109 | case DW_OP_xor: | |
1110 | case DW_OP_le: | |
1111 | case DW_OP_ge: | |
1112 | case DW_OP_eq: | |
1113 | case DW_OP_lt: | |
1114 | case DW_OP_gt: | |
1115 | case DW_OP_ne: | |
1116 | { | |
f2c7657e | 1117 | /* Binary operations. */ |
8a9b8146 | 1118 | struct value *first, *second; |
4c2df51b DJ |
1119 | |
1120 | second = dwarf_expr_fetch (ctx, 0); | |
1121 | dwarf_expr_pop (ctx); | |
1122 | ||
b263358a | 1123 | first = dwarf_expr_fetch (ctx, 0); |
4c2df51b DJ |
1124 | dwarf_expr_pop (ctx); |
1125 | ||
8a9b8146 TT |
1126 | if (! base_types_equal_p (value_type (first), value_type (second))) |
1127 | error (_("Incompatible types on DWARF stack")); | |
1128 | ||
4c2df51b DJ |
1129 | switch (op) |
1130 | { | |
1131 | case DW_OP_and: | |
8a9b8146 TT |
1132 | dwarf_require_integral (value_type (first)); |
1133 | dwarf_require_integral (value_type (second)); | |
1134 | result_val = value_binop (first, second, BINOP_BITWISE_AND); | |
4c2df51b DJ |
1135 | break; |
1136 | case DW_OP_div: | |
8a9b8146 | 1137 | result_val = value_binop (first, second, BINOP_DIV); |
99c87dab | 1138 | break; |
4c2df51b | 1139 | case DW_OP_minus: |
8a9b8146 | 1140 | result_val = value_binop (first, second, BINOP_SUB); |
4c2df51b DJ |
1141 | break; |
1142 | case DW_OP_mod: | |
8a9b8146 TT |
1143 | { |
1144 | int cast_back = 0; | |
1145 | struct type *orig_type = value_type (first); | |
1146 | ||
1147 | /* We have to special-case "old-style" untyped values | |
1148 | -- these must have mod computed using unsigned | |
1149 | math. */ | |
1150 | if (orig_type == address_type) | |
1151 | { | |
1152 | struct type *utype | |
1153 | = get_unsigned_type (ctx->gdbarch, orig_type); | |
1154 | ||
1155 | cast_back = 1; | |
1156 | first = value_cast (utype, first); | |
1157 | second = value_cast (utype, second); | |
1158 | } | |
1159 | /* Note that value_binop doesn't handle float or | |
1160 | decimal float here. This seems unimportant. */ | |
1161 | result_val = value_binop (first, second, BINOP_MOD); | |
1162 | if (cast_back) | |
1163 | result_val = value_cast (orig_type, result_val); | |
1164 | } | |
4c2df51b DJ |
1165 | break; |
1166 | case DW_OP_mul: | |
8a9b8146 | 1167 | result_val = value_binop (first, second, BINOP_MUL); |
4c2df51b DJ |
1168 | break; |
1169 | case DW_OP_or: | |
8a9b8146 TT |
1170 | dwarf_require_integral (value_type (first)); |
1171 | dwarf_require_integral (value_type (second)); | |
1172 | result_val = value_binop (first, second, BINOP_BITWISE_IOR); | |
4c2df51b DJ |
1173 | break; |
1174 | case DW_OP_plus: | |
8a9b8146 | 1175 | result_val = value_binop (first, second, BINOP_ADD); |
4c2df51b DJ |
1176 | break; |
1177 | case DW_OP_shl: | |
8a9b8146 TT |
1178 | dwarf_require_integral (value_type (first)); |
1179 | dwarf_require_integral (value_type (second)); | |
1180 | result_val = value_binop (first, second, BINOP_LSH); | |
4c2df51b DJ |
1181 | break; |
1182 | case DW_OP_shr: | |
8a9b8146 TT |
1183 | dwarf_require_integral (value_type (first)); |
1184 | dwarf_require_integral (value_type (second)); | |
b087e0ed | 1185 | if (!TYPE_UNSIGNED (value_type (first))) |
8a9b8146 TT |
1186 | { |
1187 | struct type *utype | |
1188 | = get_unsigned_type (ctx->gdbarch, value_type (first)); | |
1189 | ||
1190 | first = value_cast (utype, first); | |
1191 | } | |
1192 | ||
1193 | result_val = value_binop (first, second, BINOP_RSH); | |
1194 | /* Make sure we wind up with the same type we started | |
1195 | with. */ | |
1196 | if (value_type (result_val) != value_type (second)) | |
1197 | result_val = value_cast (value_type (second), result_val); | |
99c87dab | 1198 | break; |
4c2df51b | 1199 | case DW_OP_shra: |
8a9b8146 TT |
1200 | dwarf_require_integral (value_type (first)); |
1201 | dwarf_require_integral (value_type (second)); | |
8ddd9a20 TT |
1202 | if (TYPE_UNSIGNED (value_type (first))) |
1203 | { | |
1204 | struct type *stype | |
1205 | = get_signed_type (ctx->gdbarch, value_type (first)); | |
1206 | ||
1207 | first = value_cast (stype, first); | |
1208 | } | |
1209 | ||
8a9b8146 | 1210 | result_val = value_binop (first, second, BINOP_RSH); |
8ddd9a20 TT |
1211 | /* Make sure we wind up with the same type we started |
1212 | with. */ | |
1213 | if (value_type (result_val) != value_type (second)) | |
1214 | result_val = value_cast (value_type (second), result_val); | |
4c2df51b DJ |
1215 | break; |
1216 | case DW_OP_xor: | |
8a9b8146 TT |
1217 | dwarf_require_integral (value_type (first)); |
1218 | dwarf_require_integral (value_type (second)); | |
1219 | result_val = value_binop (first, second, BINOP_BITWISE_XOR); | |
4c2df51b DJ |
1220 | break; |
1221 | case DW_OP_le: | |
8a9b8146 TT |
1222 | /* A <= B is !(B < A). */ |
1223 | result = ! value_less (second, first); | |
1224 | result_val = value_from_ulongest (address_type, result); | |
4c2df51b DJ |
1225 | break; |
1226 | case DW_OP_ge: | |
8a9b8146 TT |
1227 | /* A >= B is !(A < B). */ |
1228 | result = ! value_less (first, second); | |
1229 | result_val = value_from_ulongest (address_type, result); | |
4c2df51b DJ |
1230 | break; |
1231 | case DW_OP_eq: | |
8a9b8146 TT |
1232 | result = value_equal (first, second); |
1233 | result_val = value_from_ulongest (address_type, result); | |
4c2df51b DJ |
1234 | break; |
1235 | case DW_OP_lt: | |
8a9b8146 TT |
1236 | result = value_less (first, second); |
1237 | result_val = value_from_ulongest (address_type, result); | |
4c2df51b DJ |
1238 | break; |
1239 | case DW_OP_gt: | |
8a9b8146 TT |
1240 | /* A > B is B < A. */ |
1241 | result = value_less (second, first); | |
1242 | result_val = value_from_ulongest (address_type, result); | |
4c2df51b DJ |
1243 | break; |
1244 | case DW_OP_ne: | |
8a9b8146 TT |
1245 | result = ! value_equal (first, second); |
1246 | result_val = value_from_ulongest (address_type, result); | |
4c2df51b DJ |
1247 | break; |
1248 | default: | |
1249 | internal_error (__FILE__, __LINE__, | |
e2e0b3e5 | 1250 | _("Can't be reached.")); |
4c2df51b | 1251 | } |
4c2df51b DJ |
1252 | } |
1253 | break; | |
1254 | ||
e7802207 | 1255 | case DW_OP_call_frame_cfa: |
9e8b7a03 | 1256 | result = (ctx->funcs->get_frame_cfa) (ctx->baton); |
8a9b8146 | 1257 | result_val = value_from_ulongest (address_type, result); |
44353522 | 1258 | in_stack_memory = 1; |
e7802207 TT |
1259 | break; |
1260 | ||
4c2df51b | 1261 | case DW_OP_GNU_push_tls_address: |
c3228f12 EZ |
1262 | /* Variable is at a constant offset in the thread-local |
1263 | storage block into the objfile for the current thread and | |
0963b4bd | 1264 | the dynamic linker module containing this expression. Here |
c3228f12 EZ |
1265 | we return returns the offset from that base. The top of the |
1266 | stack has the offset from the beginning of the thread | |
1267 | control block at which the variable is located. Nothing | |
1268 | should follow this operator, so the top of stack would be | |
1269 | returned. */ | |
8a9b8146 | 1270 | result = value_as_long (dwarf_expr_fetch (ctx, 0)); |
4c2df51b | 1271 | dwarf_expr_pop (ctx); |
9e8b7a03 | 1272 | result = (ctx->funcs->get_tls_address) (ctx->baton, result); |
8a9b8146 | 1273 | result_val = value_from_ulongest (address_type, result); |
4c2df51b DJ |
1274 | break; |
1275 | ||
1276 | case DW_OP_skip: | |
e17a4113 | 1277 | offset = extract_signed_integer (op_ptr, 2, byte_order); |
4c2df51b DJ |
1278 | op_ptr += 2; |
1279 | op_ptr += offset; | |
1280 | goto no_push; | |
1281 | ||
1282 | case DW_OP_bra: | |
8a9b8146 TT |
1283 | { |
1284 | struct value *val; | |
1285 | ||
1286 | offset = extract_signed_integer (op_ptr, 2, byte_order); | |
1287 | op_ptr += 2; | |
1288 | val = dwarf_expr_fetch (ctx, 0); | |
1289 | dwarf_require_integral (value_type (val)); | |
1290 | if (value_as_long (val) != 0) | |
1291 | op_ptr += offset; | |
1292 | dwarf_expr_pop (ctx); | |
1293 | } | |
4c2df51b DJ |
1294 | goto no_push; |
1295 | ||
1296 | case DW_OP_nop: | |
1297 | goto no_push; | |
1298 | ||
87808bd6 JB |
1299 | case DW_OP_piece: |
1300 | { | |
9fccedf7 | 1301 | uint64_t size; |
87808bd6 JB |
1302 | |
1303 | /* Record the piece. */ | |
f664829e | 1304 | op_ptr = safe_read_uleb128 (op_ptr, op_end, &size); |
d3b1e874 | 1305 | add_piece (ctx, 8 * size, 0); |
87808bd6 | 1306 | |
cec03d70 TT |
1307 | /* Pop off the address/regnum, and reset the location |
1308 | type. */ | |
cb826367 TT |
1309 | if (ctx->location != DWARF_VALUE_LITERAL |
1310 | && ctx->location != DWARF_VALUE_OPTIMIZED_OUT) | |
cec03d70 TT |
1311 | dwarf_expr_pop (ctx); |
1312 | ctx->location = DWARF_VALUE_MEMORY; | |
87808bd6 JB |
1313 | } |
1314 | goto no_push; | |
1315 | ||
d3b1e874 TT |
1316 | case DW_OP_bit_piece: |
1317 | { | |
9fccedf7 | 1318 | uint64_t size, offset; |
d3b1e874 TT |
1319 | |
1320 | /* Record the piece. */ | |
f664829e DE |
1321 | op_ptr = safe_read_uleb128 (op_ptr, op_end, &size); |
1322 | op_ptr = safe_read_uleb128 (op_ptr, op_end, &offset); | |
d3b1e874 TT |
1323 | add_piece (ctx, size, offset); |
1324 | ||
1325 | /* Pop off the address/regnum, and reset the location | |
1326 | type. */ | |
1327 | if (ctx->location != DWARF_VALUE_LITERAL | |
1328 | && ctx->location != DWARF_VALUE_OPTIMIZED_OUT) | |
1329 | dwarf_expr_pop (ctx); | |
1330 | ctx->location = DWARF_VALUE_MEMORY; | |
1331 | } | |
1332 | goto no_push; | |
1333 | ||
42be36b3 CT |
1334 | case DW_OP_GNU_uninit: |
1335 | if (op_ptr != op_end) | |
9c482037 | 1336 | error (_("DWARF-2 expression error: DW_OP_GNU_uninit must always " |
42be36b3 CT |
1337 | "be the very last op.")); |
1338 | ||
1339 | ctx->initialized = 0; | |
1340 | goto no_push; | |
1341 | ||
5c631832 | 1342 | case DW_OP_call2: |
b64f50a1 JK |
1343 | { |
1344 | cu_offset offset; | |
1345 | ||
1346 | offset.cu_off = extract_unsigned_integer (op_ptr, 2, byte_order); | |
1347 | op_ptr += 2; | |
1348 | ctx->funcs->dwarf_call (ctx, offset); | |
1349 | } | |
5c631832 JK |
1350 | goto no_push; |
1351 | ||
1352 | case DW_OP_call4: | |
b64f50a1 JK |
1353 | { |
1354 | cu_offset offset; | |
1355 | ||
1356 | offset.cu_off = extract_unsigned_integer (op_ptr, 4, byte_order); | |
1357 | op_ptr += 4; | |
1358 | ctx->funcs->dwarf_call (ctx, offset); | |
1359 | } | |
5c631832 | 1360 | goto no_push; |
dd90784c JK |
1361 | |
1362 | case DW_OP_GNU_entry_value: | |
8e3b41a9 | 1363 | { |
9fccedf7 | 1364 | uint64_t len; |
8e3b41a9 | 1365 | CORE_ADDR deref_size; |
24c5c679 | 1366 | union call_site_parameter_u kind_u; |
8e3b41a9 | 1367 | |
f664829e | 1368 | op_ptr = safe_read_uleb128 (op_ptr, op_end, &len); |
8e3b41a9 JK |
1369 | if (op_ptr + len > op_end) |
1370 | error (_("DW_OP_GNU_entry_value: too few bytes available.")); | |
1371 | ||
24c5c679 JK |
1372 | kind_u.dwarf_reg = dwarf_block_to_dwarf_reg (op_ptr, op_ptr + len); |
1373 | if (kind_u.dwarf_reg != -1) | |
8e3b41a9 JK |
1374 | { |
1375 | op_ptr += len; | |
24c5c679 JK |
1376 | ctx->funcs->push_dwarf_reg_entry_value (ctx, |
1377 | CALL_SITE_PARAMETER_DWARF_REG, | |
1378 | kind_u, | |
a471c594 JK |
1379 | -1 /* deref_size */); |
1380 | goto no_push; | |
1381 | } | |
1382 | ||
24c5c679 JK |
1383 | kind_u.dwarf_reg = dwarf_block_to_dwarf_reg_deref (op_ptr, |
1384 | op_ptr + len, | |
1385 | &deref_size); | |
1386 | if (kind_u.dwarf_reg != -1) | |
a471c594 JK |
1387 | { |
1388 | if (deref_size == -1) | |
1389 | deref_size = ctx->addr_size; | |
1390 | op_ptr += len; | |
24c5c679 JK |
1391 | ctx->funcs->push_dwarf_reg_entry_value (ctx, |
1392 | CALL_SITE_PARAMETER_DWARF_REG, | |
1393 | kind_u, deref_size); | |
8e3b41a9 JK |
1394 | goto no_push; |
1395 | } | |
1396 | ||
1397 | error (_("DWARF-2 expression error: DW_OP_GNU_entry_value is " | |
a471c594 JK |
1398 | "supported only for single DW_OP_reg* " |
1399 | "or for DW_OP_breg*(0)+DW_OP_deref*")); | |
8e3b41a9 | 1400 | } |
5c631832 | 1401 | |
1788b2d3 JK |
1402 | case DW_OP_GNU_parameter_ref: |
1403 | { | |
1404 | union call_site_parameter_u kind_u; | |
1405 | ||
1406 | kind_u.param_offset.cu_off = extract_unsigned_integer (op_ptr, 4, | |
1407 | byte_order); | |
1408 | op_ptr += 4; | |
1409 | ctx->funcs->push_dwarf_reg_entry_value (ctx, | |
1410 | CALL_SITE_PARAMETER_PARAM_OFFSET, | |
1411 | kind_u, | |
1412 | -1 /* deref_size */); | |
1413 | } | |
1414 | goto no_push; | |
1415 | ||
8a9b8146 TT |
1416 | case DW_OP_GNU_const_type: |
1417 | { | |
b64f50a1 | 1418 | cu_offset type_die; |
8a9b8146 TT |
1419 | int n; |
1420 | const gdb_byte *data; | |
1421 | struct type *type; | |
1422 | ||
f664829e | 1423 | op_ptr = safe_read_uleb128 (op_ptr, op_end, &uoffset); |
b64f50a1 | 1424 | type_die.cu_off = uoffset; |
8a9b8146 TT |
1425 | n = *op_ptr++; |
1426 | data = op_ptr; | |
1427 | op_ptr += n; | |
1428 | ||
1429 | type = dwarf_get_base_type (ctx, type_die, n); | |
1430 | result_val = value_from_contents (type, data); | |
1431 | } | |
1432 | break; | |
1433 | ||
1434 | case DW_OP_GNU_regval_type: | |
1435 | { | |
b64f50a1 | 1436 | cu_offset type_die; |
8a9b8146 TT |
1437 | struct type *type; |
1438 | ||
f664829e DE |
1439 | op_ptr = safe_read_uleb128 (op_ptr, op_end, ®); |
1440 | op_ptr = safe_read_uleb128 (op_ptr, op_end, &uoffset); | |
b64f50a1 | 1441 | type_die.cu_off = uoffset; |
8a9b8146 TT |
1442 | |
1443 | type = dwarf_get_base_type (ctx, type_die, 0); | |
0acf8b65 | 1444 | result_val = ctx->funcs->get_reg_value (ctx->baton, type, reg); |
8a9b8146 TT |
1445 | } |
1446 | break; | |
1447 | ||
1448 | case DW_OP_GNU_convert: | |
1449 | case DW_OP_GNU_reinterpret: | |
1450 | { | |
b64f50a1 | 1451 | cu_offset type_die; |
8a9b8146 TT |
1452 | struct type *type; |
1453 | ||
f664829e | 1454 | op_ptr = safe_read_uleb128 (op_ptr, op_end, &uoffset); |
b64f50a1 | 1455 | type_die.cu_off = uoffset; |
8a9b8146 | 1456 | |
b64f50a1 | 1457 | if (type_die.cu_off == 0) |
c38c4bc5 TT |
1458 | type = address_type; |
1459 | else | |
1460 | type = dwarf_get_base_type (ctx, type_die, 0); | |
8a9b8146 TT |
1461 | |
1462 | result_val = dwarf_expr_fetch (ctx, 0); | |
1463 | dwarf_expr_pop (ctx); | |
1464 | ||
1465 | if (op == DW_OP_GNU_convert) | |
1466 | result_val = value_cast (type, result_val); | |
1467 | else if (type == value_type (result_val)) | |
1468 | { | |
1469 | /* Nothing. */ | |
1470 | } | |
1471 | else if (TYPE_LENGTH (type) | |
1472 | != TYPE_LENGTH (value_type (result_val))) | |
1473 | error (_("DW_OP_GNU_reinterpret has wrong size")); | |
1474 | else | |
1475 | result_val | |
1476 | = value_from_contents (type, | |
1477 | value_contents_all (result_val)); | |
1478 | } | |
1479 | break; | |
1480 | ||
4c2df51b | 1481 | default: |
8a3fe4f8 | 1482 | error (_("Unhandled dwarf expression opcode 0x%x"), op); |
4c2df51b DJ |
1483 | } |
1484 | ||
1485 | /* Most things push a result value. */ | |
8a9b8146 TT |
1486 | gdb_assert (result_val != NULL); |
1487 | dwarf_expr_push (ctx, result_val, in_stack_memory); | |
82ae4854 | 1488 | no_push: |
b27cf2b3 | 1489 | ; |
4c2df51b | 1490 | } |
1e3a102a | 1491 | |
8cf6f0b1 TT |
1492 | /* To simplify our main caller, if the result is an implicit |
1493 | pointer, then make a pieced value. This is ok because we can't | |
1494 | have implicit pointers in contexts where pieces are invalid. */ | |
1495 | if (ctx->location == DWARF_VALUE_IMPLICIT_POINTER) | |
1496 | add_piece (ctx, 8 * ctx->addr_size, 0); | |
1497 | ||
dd90784c | 1498 | abort_expression: |
1e3a102a JK |
1499 | ctx->recursion_depth--; |
1500 | gdb_assert (ctx->recursion_depth >= 0); | |
8a9b8146 TT |
1501 | } |
1502 | ||
523f3620 JK |
1503 | /* Stub dwarf_expr_context_funcs.get_frame_base implementation. */ |
1504 | ||
1505 | void | |
1506 | ctx_no_get_frame_base (void *baton, const gdb_byte **start, size_t *length) | |
1507 | { | |
1508 | error (_("%s is invalid in this context"), "DW_OP_fbreg"); | |
1509 | } | |
1510 | ||
1511 | /* Stub dwarf_expr_context_funcs.get_frame_cfa implementation. */ | |
1512 | ||
1513 | CORE_ADDR | |
1514 | ctx_no_get_frame_cfa (void *baton) | |
1515 | { | |
1516 | error (_("%s is invalid in this context"), "DW_OP_call_frame_cfa"); | |
1517 | } | |
1518 | ||
1519 | /* Stub dwarf_expr_context_funcs.get_frame_pc implementation. */ | |
1520 | ||
1521 | CORE_ADDR | |
1522 | ctx_no_get_frame_pc (void *baton) | |
1523 | { | |
1524 | error (_("%s is invalid in this context"), "DW_OP_GNU_implicit_pointer"); | |
1525 | } | |
1526 | ||
1527 | /* Stub dwarf_expr_context_funcs.get_tls_address implementation. */ | |
1528 | ||
1529 | CORE_ADDR | |
1530 | ctx_no_get_tls_address (void *baton, CORE_ADDR offset) | |
1531 | { | |
1532 | error (_("%s is invalid in this context"), "DW_OP_GNU_push_tls_address"); | |
1533 | } | |
1534 | ||
1535 | /* Stub dwarf_expr_context_funcs.dwarf_call implementation. */ | |
1536 | ||
1537 | void | |
b64f50a1 | 1538 | ctx_no_dwarf_call (struct dwarf_expr_context *ctx, cu_offset die_offset) |
523f3620 JK |
1539 | { |
1540 | error (_("%s is invalid in this context"), "DW_OP_call*"); | |
1541 | } | |
1542 | ||
1543 | /* Stub dwarf_expr_context_funcs.get_base_type implementation. */ | |
1544 | ||
1545 | struct type * | |
b64f50a1 | 1546 | ctx_no_get_base_type (struct dwarf_expr_context *ctx, cu_offset die) |
523f3620 JK |
1547 | { |
1548 | error (_("Support for typed DWARF is not supported in this context")); | |
1549 | } | |
1550 | ||
8e3b41a9 JK |
1551 | /* Stub dwarf_expr_context_funcs.push_dwarf_block_entry_value |
1552 | implementation. */ | |
1553 | ||
1554 | void | |
1555 | ctx_no_push_dwarf_reg_entry_value (struct dwarf_expr_context *ctx, | |
24c5c679 JK |
1556 | enum call_site_parameter_kind kind, |
1557 | union call_site_parameter_u kind_u, | |
a471c594 | 1558 | int deref_size) |
8e3b41a9 JK |
1559 | { |
1560 | internal_error (__FILE__, __LINE__, | |
1561 | _("Support for DW_OP_GNU_entry_value is unimplemented")); | |
1562 | } | |
1563 | ||
3019eac3 DE |
1564 | /* Stub dwarf_expr_context_funcs.get_addr_index implementation. */ |
1565 | ||
1566 | CORE_ADDR | |
1567 | ctx_no_get_addr_index (void *baton, unsigned int index) | |
1568 | { | |
1569 | error (_("%s is invalid in this context"), "DW_OP_GNU_addr_index"); | |
1570 | } | |
1571 | ||
70221824 PA |
1572 | /* Provide a prototype to silence -Wmissing-prototypes. */ |
1573 | extern initialize_file_ftype _initialize_dwarf2expr; | |
1574 | ||
8a9b8146 TT |
1575 | void |
1576 | _initialize_dwarf2expr (void) | |
1577 | { | |
1578 | dwarf_arch_cookie | |
1579 | = gdbarch_data_register_post_init (dwarf_gdbarch_types_init); | |
4c2df51b | 1580 | } |