Commit | Line | Data |
---|---|---|
07dfc1d0 MD |
1 | /* |
2 | * lttng-filter-interpreter.c | |
3 | * | |
4 | * LTTng modules filter interpreter. | |
5 | * | |
bbf3aef5 | 6 | * Copyright (C) 2010-2016 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
07dfc1d0 | 7 | * |
bbf3aef5 MD |
8 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
9 | * of this software and associated documentation files (the "Software"), to deal | |
10 | * in the Software without restriction, including without limitation the rights | |
11 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
12 | * copies of the Software, and to permit persons to whom the Software is | |
13 | * furnished to do so, subject to the following conditions: | |
07dfc1d0 | 14 | * |
bbf3aef5 MD |
15 | * The above copyright notice and this permission notice shall be included in |
16 | * all copies or substantial portions of the Software. | |
07dfc1d0 | 17 | * |
bbf3aef5 MD |
18 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
19 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
20 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | |
21 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
22 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
23 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
24 | * SOFTWARE. | |
07dfc1d0 MD |
25 | */ |
26 | ||
f127e61e | 27 | #include <linux/uaccess.h> |
63155590 | 28 | #include <wrapper/frame.h> |
cbc19040 | 29 | #include <wrapper/types.h> |
f127e61e | 30 | |
241ae9a8 | 31 | #include <lttng-filter.h> |
02aca193 | 32 | #include <lttng-string-utils.h> |
07dfc1d0 | 33 | |
63155590 MD |
34 | LTTNG_STACK_FRAME_NON_STANDARD(lttng_filter_interpret_bytecode); |
35 | ||
f127e61e MD |
36 | /* |
37 | * get_char should be called with page fault handler disabled if it is expected | |
38 | * to handle user-space read. | |
39 | */ | |
40 | static | |
41 | char get_char(struct estack_entry *reg, size_t offset) | |
42 | { | |
43 | if (unlikely(offset >= reg->u.s.seq_len)) | |
44 | return '\0'; | |
45 | if (reg->u.s.user) { | |
46 | char c; | |
47 | ||
48 | /* Handle invalid access as end of string. */ | |
49 | if (unlikely(!access_ok(VERIFY_READ, | |
50 | reg->u.s.user_str + offset, | |
51 | sizeof(c)))) | |
52 | return '\0'; | |
53 | /* Handle fault (nonzero return value) as end of string. */ | |
54 | if (unlikely(__copy_from_user_inatomic(&c, | |
55 | reg->u.s.user_str + offset, | |
56 | sizeof(c)))) | |
57 | return '\0'; | |
58 | return c; | |
59 | } else { | |
60 | return reg->u.s.str[offset]; | |
61 | } | |
62 | } | |
63 | ||
07dfc1d0 MD |
64 | /* |
65 | * -1: wildcard found. | |
66 | * -2: unknown escape char. | |
67 | * 0: normal char. | |
68 | */ | |
07dfc1d0 | 69 | static |
f127e61e | 70 | int parse_char(struct estack_entry *reg, char *c, size_t *offset) |
07dfc1d0 | 71 | { |
f127e61e | 72 | switch (*c) { |
07dfc1d0 | 73 | case '\\': |
f127e61e MD |
74 | (*offset)++; |
75 | *c = get_char(reg, *offset); | |
76 | switch (*c) { | |
07dfc1d0 MD |
77 | case '\\': |
78 | case '*': | |
79 | return 0; | |
80 | default: | |
81 | return -2; | |
82 | } | |
83 | case '*': | |
84 | return -1; | |
85 | default: | |
86 | return 0; | |
87 | } | |
88 | } | |
89 | ||
02aca193 PP |
90 | static |
91 | char get_char_at_cb(size_t at, void *data) | |
92 | { | |
93 | return get_char(data, at); | |
94 | } | |
95 | ||
96 | static | |
97 | int stack_star_glob_match(struct estack *stack, int top, const char *cmp_type) | |
98 | { | |
99 | bool has_user = false; | |
100 | mm_segment_t old_fs; | |
101 | int result; | |
102 | struct estack_entry *pattern_reg; | |
103 | struct estack_entry *candidate_reg; | |
104 | ||
105 | if (estack_bx(stack, top)->u.s.user | |
106 | || estack_ax(stack, top)->u.s.user) { | |
107 | has_user = true; | |
108 | old_fs = get_fs(); | |
109 | set_fs(KERNEL_DS); | |
110 | pagefault_disable(); | |
111 | } | |
112 | ||
113 | /* Find out which side is the pattern vs. the candidate. */ | |
114 | if (estack_ax(stack, top)->u.s.literal_type == ESTACK_STRING_LITERAL_TYPE_STAR_GLOB) { | |
115 | pattern_reg = estack_ax(stack, top); | |
116 | candidate_reg = estack_bx(stack, top); | |
117 | } else { | |
118 | pattern_reg = estack_bx(stack, top); | |
119 | candidate_reg = estack_ax(stack, top); | |
120 | } | |
121 | ||
122 | /* Perform the match operation. */ | |
123 | result = !strutils_star_glob_match_char_cb(get_char_at_cb, | |
124 | pattern_reg, get_char_at_cb, candidate_reg); | |
125 | if (has_user) { | |
126 | pagefault_enable(); | |
127 | set_fs(old_fs); | |
128 | } | |
129 | ||
130 | return result; | |
131 | } | |
132 | ||
07dfc1d0 MD |
133 | static |
134 | int stack_strcmp(struct estack *stack, int top, const char *cmp_type) | |
135 | { | |
f127e61e MD |
136 | size_t offset_bx = 0, offset_ax = 0; |
137 | int diff, has_user = 0; | |
138 | mm_segment_t old_fs; | |
139 | ||
140 | if (estack_bx(stack, top)->u.s.user | |
141 | || estack_ax(stack, top)->u.s.user) { | |
142 | has_user = 1; | |
143 | old_fs = get_fs(); | |
144 | set_fs(KERNEL_DS); | |
145 | pagefault_disable(); | |
146 | } | |
07dfc1d0 MD |
147 | |
148 | for (;;) { | |
f127e61e | 149 | int ret; |
07dfc1d0 | 150 | int escaped_r0 = 0; |
f127e61e | 151 | char char_bx, char_ax; |
07dfc1d0 | 152 | |
f127e61e MD |
153 | char_bx = get_char(estack_bx(stack, top), offset_bx); |
154 | char_ax = get_char(estack_ax(stack, top), offset_ax); | |
155 | ||
156 | if (unlikely(char_bx == '\0')) { | |
157 | if (char_ax == '\0') { | |
158 | diff = 0; | |
159 | break; | |
07dfc1d0 | 160 | } else { |
02aca193 PP |
161 | if (estack_ax(stack, top)->u.s.literal_type == |
162 | ESTACK_STRING_LITERAL_TYPE_PLAIN) { | |
f127e61e MD |
163 | ret = parse_char(estack_ax(stack, top), |
164 | &char_ax, &offset_ax); | |
165 | if (ret == -1) { | |
166 | diff = 0; | |
167 | break; | |
168 | } | |
07dfc1d0 | 169 | } |
f127e61e MD |
170 | diff = -1; |
171 | break; | |
07dfc1d0 MD |
172 | } |
173 | } | |
f127e61e | 174 | if (unlikely(char_ax == '\0')) { |
02aca193 PP |
175 | if (estack_bx(stack, top)->u.s.literal_type == |
176 | ESTACK_STRING_LITERAL_TYPE_PLAIN) { | |
abfd272b MD |
177 | ret = parse_char(estack_bx(stack, top), |
178 | &char_bx, &offset_bx); | |
179 | if (ret == -1) { | |
180 | diff = 0; | |
181 | break; | |
07dfc1d0 | 182 | } |
07dfc1d0 | 183 | } |
abfd272b MD |
184 | diff = 1; |
185 | break; | |
07dfc1d0 | 186 | } |
02aca193 PP |
187 | if (estack_bx(stack, top)->u.s.literal_type == |
188 | ESTACK_STRING_LITERAL_TYPE_PLAIN) { | |
f127e61e MD |
189 | ret = parse_char(estack_bx(stack, top), |
190 | &char_bx, &offset_bx); | |
07dfc1d0 | 191 | if (ret == -1) { |
f127e61e MD |
192 | diff = 0; |
193 | break; | |
07dfc1d0 MD |
194 | } else if (ret == -2) { |
195 | escaped_r0 = 1; | |
196 | } | |
197 | /* else compare both char */ | |
198 | } | |
02aca193 PP |
199 | if (estack_ax(stack, top)->u.s.literal_type == |
200 | ESTACK_STRING_LITERAL_TYPE_PLAIN) { | |
f127e61e MD |
201 | ret = parse_char(estack_ax(stack, top), |
202 | &char_ax, &offset_ax); | |
07dfc1d0 | 203 | if (ret == -1) { |
f127e61e MD |
204 | diff = 0; |
205 | break; | |
07dfc1d0 | 206 | } else if (ret == -2) { |
f127e61e MD |
207 | if (!escaped_r0) { |
208 | diff = -1; | |
209 | break; | |
210 | } | |
07dfc1d0 | 211 | } else { |
f127e61e MD |
212 | if (escaped_r0) { |
213 | diff = 1; | |
214 | break; | |
215 | } | |
07dfc1d0 MD |
216 | } |
217 | } else { | |
f127e61e MD |
218 | if (escaped_r0) { |
219 | diff = 1; | |
220 | break; | |
221 | } | |
07dfc1d0 | 222 | } |
f127e61e | 223 | diff = char_bx - char_ax; |
07dfc1d0 MD |
224 | if (diff != 0) |
225 | break; | |
f127e61e MD |
226 | offset_bx++; |
227 | offset_ax++; | |
228 | } | |
229 | if (has_user) { | |
230 | pagefault_enable(); | |
231 | set_fs(old_fs); | |
07dfc1d0 MD |
232 | } |
233 | return diff; | |
234 | } | |
235 | ||
236 | uint64_t lttng_filter_false(void *filter_data, | |
79150a49 | 237 | struct lttng_probe_ctx *lttng_probe_ctx, |
07dfc1d0 MD |
238 | const char *filter_stack_data) |
239 | { | |
240 | return 0; | |
241 | } | |
242 | ||
243 | #ifdef INTERPRETER_USE_SWITCH | |
244 | ||
245 | /* | |
246 | * Fallback for compilers that do not support taking address of labels. | |
247 | */ | |
248 | ||
249 | #define START_OP \ | |
250 | start_pc = &bytecode->data[0]; \ | |
251 | for (pc = next_pc = start_pc; pc - start_pc < bytecode->len; \ | |
252 | pc = next_pc) { \ | |
253 | dbg_printk("Executing op %s (%u)\n", \ | |
254 | lttng_filter_print_op((unsigned int) *(filter_opcode_t *) pc), \ | |
255 | (unsigned int) *(filter_opcode_t *) pc); \ | |
256 | switch (*(filter_opcode_t *) pc) { | |
257 | ||
258 | #define OP(name) case name | |
259 | ||
260 | #define PO break | |
261 | ||
262 | #define END_OP } \ | |
263 | } | |
264 | ||
265 | #else | |
266 | ||
267 | /* | |
268 | * Dispatch-table based interpreter. | |
269 | */ | |
270 | ||
271 | #define START_OP \ | |
272 | start_pc = &bytecode->data[0]; \ | |
273 | pc = next_pc = start_pc; \ | |
274 | if (unlikely(pc - start_pc >= bytecode->len)) \ | |
275 | goto end; \ | |
276 | goto *dispatch[*(filter_opcode_t *) pc]; | |
277 | ||
278 | #define OP(name) \ | |
279 | LABEL_##name | |
280 | ||
281 | #define PO \ | |
282 | pc = next_pc; \ | |
283 | goto *dispatch[*(filter_opcode_t *) pc]; | |
284 | ||
285 | #define END_OP | |
286 | ||
287 | #endif | |
288 | ||
289 | /* | |
290 | * Return 0 (discard), or raise the 0x1 flag (log event). | |
291 | * Currently, other flags are kept for future extensions and have no | |
292 | * effect. | |
293 | */ | |
294 | uint64_t lttng_filter_interpret_bytecode(void *filter_data, | |
79150a49 | 295 | struct lttng_probe_ctx *lttng_probe_ctx, |
07dfc1d0 MD |
296 | const char *filter_stack_data) |
297 | { | |
298 | struct bytecode_runtime *bytecode = filter_data; | |
299 | void *pc, *next_pc, *start_pc; | |
300 | int ret = -EINVAL; | |
301 | uint64_t retval = 0; | |
302 | struct estack _stack; | |
303 | struct estack *stack = &_stack; | |
304 | register int64_t ax = 0, bx = 0; | |
305 | register int top = FILTER_STACK_EMPTY; | |
306 | #ifndef INTERPRETER_USE_SWITCH | |
307 | static void *dispatch[NR_FILTER_OPS] = { | |
308 | [ FILTER_OP_UNKNOWN ] = &&LABEL_FILTER_OP_UNKNOWN, | |
309 | ||
310 | [ FILTER_OP_RETURN ] = &&LABEL_FILTER_OP_RETURN, | |
311 | ||
312 | /* binary */ | |
313 | [ FILTER_OP_MUL ] = &&LABEL_FILTER_OP_MUL, | |
314 | [ FILTER_OP_DIV ] = &&LABEL_FILTER_OP_DIV, | |
315 | [ FILTER_OP_MOD ] = &&LABEL_FILTER_OP_MOD, | |
316 | [ FILTER_OP_PLUS ] = &&LABEL_FILTER_OP_PLUS, | |
317 | [ FILTER_OP_MINUS ] = &&LABEL_FILTER_OP_MINUS, | |
318 | [ FILTER_OP_RSHIFT ] = &&LABEL_FILTER_OP_RSHIFT, | |
319 | [ FILTER_OP_LSHIFT ] = &&LABEL_FILTER_OP_LSHIFT, | |
320 | [ FILTER_OP_BIN_AND ] = &&LABEL_FILTER_OP_BIN_AND, | |
321 | [ FILTER_OP_BIN_OR ] = &&LABEL_FILTER_OP_BIN_OR, | |
322 | [ FILTER_OP_BIN_XOR ] = &&LABEL_FILTER_OP_BIN_XOR, | |
323 | ||
324 | /* binary comparators */ | |
325 | [ FILTER_OP_EQ ] = &&LABEL_FILTER_OP_EQ, | |
326 | [ FILTER_OP_NE ] = &&LABEL_FILTER_OP_NE, | |
327 | [ FILTER_OP_GT ] = &&LABEL_FILTER_OP_GT, | |
328 | [ FILTER_OP_LT ] = &&LABEL_FILTER_OP_LT, | |
329 | [ FILTER_OP_GE ] = &&LABEL_FILTER_OP_GE, | |
330 | [ FILTER_OP_LE ] = &&LABEL_FILTER_OP_LE, | |
331 | ||
332 | /* string binary comparator */ | |
333 | [ FILTER_OP_EQ_STRING ] = &&LABEL_FILTER_OP_EQ_STRING, | |
334 | [ FILTER_OP_NE_STRING ] = &&LABEL_FILTER_OP_NE_STRING, | |
335 | [ FILTER_OP_GT_STRING ] = &&LABEL_FILTER_OP_GT_STRING, | |
336 | [ FILTER_OP_LT_STRING ] = &&LABEL_FILTER_OP_LT_STRING, | |
337 | [ FILTER_OP_GE_STRING ] = &&LABEL_FILTER_OP_GE_STRING, | |
338 | [ FILTER_OP_LE_STRING ] = &&LABEL_FILTER_OP_LE_STRING, | |
339 | ||
02aca193 PP |
340 | /* globbing pattern binary comparator */ |
341 | [ FILTER_OP_EQ_STAR_GLOB_STRING ] = &&LABEL_FILTER_OP_EQ_STAR_GLOB_STRING, | |
342 | [ FILTER_OP_NE_STAR_GLOB_STRING ] = &&LABEL_FILTER_OP_NE_STAR_GLOB_STRING, | |
343 | ||
07dfc1d0 MD |
344 | /* s64 binary comparator */ |
345 | [ FILTER_OP_EQ_S64 ] = &&LABEL_FILTER_OP_EQ_S64, | |
346 | [ FILTER_OP_NE_S64 ] = &&LABEL_FILTER_OP_NE_S64, | |
347 | [ FILTER_OP_GT_S64 ] = &&LABEL_FILTER_OP_GT_S64, | |
348 | [ FILTER_OP_LT_S64 ] = &&LABEL_FILTER_OP_LT_S64, | |
349 | [ FILTER_OP_GE_S64 ] = &&LABEL_FILTER_OP_GE_S64, | |
350 | [ FILTER_OP_LE_S64 ] = &&LABEL_FILTER_OP_LE_S64, | |
351 | ||
352 | /* double binary comparator */ | |
353 | [ FILTER_OP_EQ_DOUBLE ] = &&LABEL_FILTER_OP_EQ_DOUBLE, | |
354 | [ FILTER_OP_NE_DOUBLE ] = &&LABEL_FILTER_OP_NE_DOUBLE, | |
355 | [ FILTER_OP_GT_DOUBLE ] = &&LABEL_FILTER_OP_GT_DOUBLE, | |
356 | [ FILTER_OP_LT_DOUBLE ] = &&LABEL_FILTER_OP_LT_DOUBLE, | |
357 | [ FILTER_OP_GE_DOUBLE ] = &&LABEL_FILTER_OP_GE_DOUBLE, | |
358 | [ FILTER_OP_LE_DOUBLE ] = &&LABEL_FILTER_OP_LE_DOUBLE, | |
359 | ||
360 | /* Mixed S64-double binary comparators */ | |
361 | [ FILTER_OP_EQ_DOUBLE_S64 ] = &&LABEL_FILTER_OP_EQ_DOUBLE_S64, | |
362 | [ FILTER_OP_NE_DOUBLE_S64 ] = &&LABEL_FILTER_OP_NE_DOUBLE_S64, | |
363 | [ FILTER_OP_GT_DOUBLE_S64 ] = &&LABEL_FILTER_OP_GT_DOUBLE_S64, | |
364 | [ FILTER_OP_LT_DOUBLE_S64 ] = &&LABEL_FILTER_OP_LT_DOUBLE_S64, | |
365 | [ FILTER_OP_GE_DOUBLE_S64 ] = &&LABEL_FILTER_OP_GE_DOUBLE_S64, | |
366 | [ FILTER_OP_LE_DOUBLE_S64 ] = &&LABEL_FILTER_OP_LE_DOUBLE_S64, | |
367 | ||
368 | [ FILTER_OP_EQ_S64_DOUBLE ] = &&LABEL_FILTER_OP_EQ_S64_DOUBLE, | |
369 | [ FILTER_OP_NE_S64_DOUBLE ] = &&LABEL_FILTER_OP_NE_S64_DOUBLE, | |
370 | [ FILTER_OP_GT_S64_DOUBLE ] = &&LABEL_FILTER_OP_GT_S64_DOUBLE, | |
371 | [ FILTER_OP_LT_S64_DOUBLE ] = &&LABEL_FILTER_OP_LT_S64_DOUBLE, | |
372 | [ FILTER_OP_GE_S64_DOUBLE ] = &&LABEL_FILTER_OP_GE_S64_DOUBLE, | |
373 | [ FILTER_OP_LE_S64_DOUBLE ] = &&LABEL_FILTER_OP_LE_S64_DOUBLE, | |
374 | ||
375 | /* unary */ | |
376 | [ FILTER_OP_UNARY_PLUS ] = &&LABEL_FILTER_OP_UNARY_PLUS, | |
377 | [ FILTER_OP_UNARY_MINUS ] = &&LABEL_FILTER_OP_UNARY_MINUS, | |
378 | [ FILTER_OP_UNARY_NOT ] = &&LABEL_FILTER_OP_UNARY_NOT, | |
379 | [ FILTER_OP_UNARY_PLUS_S64 ] = &&LABEL_FILTER_OP_UNARY_PLUS_S64, | |
380 | [ FILTER_OP_UNARY_MINUS_S64 ] = &&LABEL_FILTER_OP_UNARY_MINUS_S64, | |
381 | [ FILTER_OP_UNARY_NOT_S64 ] = &&LABEL_FILTER_OP_UNARY_NOT_S64, | |
382 | [ FILTER_OP_UNARY_PLUS_DOUBLE ] = &&LABEL_FILTER_OP_UNARY_PLUS_DOUBLE, | |
383 | [ FILTER_OP_UNARY_MINUS_DOUBLE ] = &&LABEL_FILTER_OP_UNARY_MINUS_DOUBLE, | |
384 | [ FILTER_OP_UNARY_NOT_DOUBLE ] = &&LABEL_FILTER_OP_UNARY_NOT_DOUBLE, | |
385 | ||
386 | /* logical */ | |
387 | [ FILTER_OP_AND ] = &&LABEL_FILTER_OP_AND, | |
388 | [ FILTER_OP_OR ] = &&LABEL_FILTER_OP_OR, | |
389 | ||
390 | /* load field ref */ | |
391 | [ FILTER_OP_LOAD_FIELD_REF ] = &&LABEL_FILTER_OP_LOAD_FIELD_REF, | |
392 | [ FILTER_OP_LOAD_FIELD_REF_STRING ] = &&LABEL_FILTER_OP_LOAD_FIELD_REF_STRING, | |
393 | [ FILTER_OP_LOAD_FIELD_REF_SEQUENCE ] = &&LABEL_FILTER_OP_LOAD_FIELD_REF_SEQUENCE, | |
394 | [ FILTER_OP_LOAD_FIELD_REF_S64 ] = &&LABEL_FILTER_OP_LOAD_FIELD_REF_S64, | |
395 | [ FILTER_OP_LOAD_FIELD_REF_DOUBLE ] = &&LABEL_FILTER_OP_LOAD_FIELD_REF_DOUBLE, | |
396 | ||
397 | /* load from immediate operand */ | |
398 | [ FILTER_OP_LOAD_STRING ] = &&LABEL_FILTER_OP_LOAD_STRING, | |
02aca193 | 399 | [ FILTER_OP_LOAD_STAR_GLOB_STRING ] = &&LABEL_FILTER_OP_LOAD_STAR_GLOB_STRING, |
07dfc1d0 MD |
400 | [ FILTER_OP_LOAD_S64 ] = &&LABEL_FILTER_OP_LOAD_S64, |
401 | [ FILTER_OP_LOAD_DOUBLE ] = &&LABEL_FILTER_OP_LOAD_DOUBLE, | |
402 | ||
403 | /* cast */ | |
404 | [ FILTER_OP_CAST_TO_S64 ] = &&LABEL_FILTER_OP_CAST_TO_S64, | |
405 | [ FILTER_OP_CAST_DOUBLE_TO_S64 ] = &&LABEL_FILTER_OP_CAST_DOUBLE_TO_S64, | |
406 | [ FILTER_OP_CAST_NOP ] = &&LABEL_FILTER_OP_CAST_NOP, | |
407 | ||
408 | /* get context ref */ | |
409 | [ FILTER_OP_GET_CONTEXT_REF ] = &&LABEL_FILTER_OP_GET_CONTEXT_REF, | |
410 | [ FILTER_OP_GET_CONTEXT_REF_STRING ] = &&LABEL_FILTER_OP_GET_CONTEXT_REF_STRING, | |
411 | [ FILTER_OP_GET_CONTEXT_REF_S64 ] = &&LABEL_FILTER_OP_GET_CONTEXT_REF_S64, | |
412 | [ FILTER_OP_GET_CONTEXT_REF_DOUBLE ] = &&LABEL_FILTER_OP_GET_CONTEXT_REF_DOUBLE, | |
f127e61e MD |
413 | |
414 | /* load userspace field ref */ | |
415 | [ FILTER_OP_LOAD_FIELD_REF_USER_STRING ] = &&LABEL_FILTER_OP_LOAD_FIELD_REF_USER_STRING, | |
416 | [ FILTER_OP_LOAD_FIELD_REF_USER_SEQUENCE ] = &&LABEL_FILTER_OP_LOAD_FIELD_REF_USER_SEQUENCE, | |
07dfc1d0 MD |
417 | }; |
418 | #endif /* #ifndef INTERPRETER_USE_SWITCH */ | |
419 | ||
420 | START_OP | |
421 | ||
422 | OP(FILTER_OP_UNKNOWN): | |
423 | OP(FILTER_OP_LOAD_FIELD_REF): | |
424 | OP(FILTER_OP_GET_CONTEXT_REF): | |
425 | #ifdef INTERPRETER_USE_SWITCH | |
426 | default: | |
427 | #endif /* INTERPRETER_USE_SWITCH */ | |
428 | printk(KERN_WARNING "unknown bytecode op %u\n", | |
429 | (unsigned int) *(filter_opcode_t *) pc); | |
430 | ret = -EINVAL; | |
431 | goto end; | |
432 | ||
433 | OP(FILTER_OP_RETURN): | |
434 | /* LTTNG_FILTER_DISCARD or LTTNG_FILTER_RECORD_FLAG */ | |
435 | retval = !!estack_ax_v; | |
436 | ret = 0; | |
437 | goto end; | |
438 | ||
439 | /* binary */ | |
440 | OP(FILTER_OP_MUL): | |
441 | OP(FILTER_OP_DIV): | |
442 | OP(FILTER_OP_MOD): | |
443 | OP(FILTER_OP_PLUS): | |
444 | OP(FILTER_OP_MINUS): | |
445 | OP(FILTER_OP_RSHIFT): | |
446 | OP(FILTER_OP_LSHIFT): | |
447 | OP(FILTER_OP_BIN_AND): | |
448 | OP(FILTER_OP_BIN_OR): | |
449 | OP(FILTER_OP_BIN_XOR): | |
450 | printk(KERN_WARNING "unsupported bytecode op %u\n", | |
451 | (unsigned int) *(filter_opcode_t *) pc); | |
452 | ret = -EINVAL; | |
453 | goto end; | |
454 | ||
455 | OP(FILTER_OP_EQ): | |
456 | OP(FILTER_OP_NE): | |
457 | OP(FILTER_OP_GT): | |
458 | OP(FILTER_OP_LT): | |
459 | OP(FILTER_OP_GE): | |
460 | OP(FILTER_OP_LE): | |
461 | printk(KERN_WARNING "unsupported non-specialized bytecode op %u\n", | |
462 | (unsigned int) *(filter_opcode_t *) pc); | |
463 | ret = -EINVAL; | |
464 | goto end; | |
465 | ||
466 | OP(FILTER_OP_EQ_STRING): | |
467 | { | |
468 | int res; | |
469 | ||
470 | res = (stack_strcmp(stack, top, "==") == 0); | |
471 | estack_pop(stack, top, ax, bx); | |
472 | estack_ax_v = res; | |
473 | next_pc += sizeof(struct binary_op); | |
474 | PO; | |
475 | } | |
476 | OP(FILTER_OP_NE_STRING): | |
477 | { | |
478 | int res; | |
479 | ||
480 | res = (stack_strcmp(stack, top, "!=") != 0); | |
481 | estack_pop(stack, top, ax, bx); | |
482 | estack_ax_v = res; | |
483 | next_pc += sizeof(struct binary_op); | |
484 | PO; | |
485 | } | |
486 | OP(FILTER_OP_GT_STRING): | |
487 | { | |
488 | int res; | |
489 | ||
490 | res = (stack_strcmp(stack, top, ">") > 0); | |
491 | estack_pop(stack, top, ax, bx); | |
492 | estack_ax_v = res; | |
493 | next_pc += sizeof(struct binary_op); | |
494 | PO; | |
495 | } | |
496 | OP(FILTER_OP_LT_STRING): | |
497 | { | |
498 | int res; | |
499 | ||
500 | res = (stack_strcmp(stack, top, "<") < 0); | |
501 | estack_pop(stack, top, ax, bx); | |
502 | estack_ax_v = res; | |
503 | next_pc += sizeof(struct binary_op); | |
504 | PO; | |
505 | } | |
506 | OP(FILTER_OP_GE_STRING): | |
507 | { | |
508 | int res; | |
509 | ||
510 | res = (stack_strcmp(stack, top, ">=") >= 0); | |
511 | estack_pop(stack, top, ax, bx); | |
512 | estack_ax_v = res; | |
513 | next_pc += sizeof(struct binary_op); | |
514 | PO; | |
515 | } | |
516 | OP(FILTER_OP_LE_STRING): | |
517 | { | |
518 | int res; | |
519 | ||
520 | res = (stack_strcmp(stack, top, "<=") <= 0); | |
521 | estack_pop(stack, top, ax, bx); | |
522 | estack_ax_v = res; | |
523 | next_pc += sizeof(struct binary_op); | |
524 | PO; | |
525 | } | |
526 | ||
02aca193 PP |
527 | OP(FILTER_OP_EQ_STAR_GLOB_STRING): |
528 | { | |
529 | int res; | |
530 | ||
531 | res = (stack_star_glob_match(stack, top, "==") == 0); | |
532 | estack_pop(stack, top, ax, bx); | |
533 | estack_ax_v = res; | |
534 | next_pc += sizeof(struct binary_op); | |
535 | PO; | |
536 | } | |
537 | OP(FILTER_OP_NE_STAR_GLOB_STRING): | |
538 | { | |
539 | int res; | |
540 | ||
541 | res = (stack_star_glob_match(stack, top, "!=") != 0); | |
542 | estack_pop(stack, top, ax, bx); | |
543 | estack_ax_v = res; | |
544 | next_pc += sizeof(struct binary_op); | |
545 | PO; | |
546 | } | |
547 | ||
07dfc1d0 MD |
548 | OP(FILTER_OP_EQ_S64): |
549 | { | |
550 | int res; | |
551 | ||
552 | res = (estack_bx_v == estack_ax_v); | |
553 | estack_pop(stack, top, ax, bx); | |
554 | estack_ax_v = res; | |
555 | next_pc += sizeof(struct binary_op); | |
556 | PO; | |
557 | } | |
558 | OP(FILTER_OP_NE_S64): | |
559 | { | |
560 | int res; | |
561 | ||
562 | res = (estack_bx_v != estack_ax_v); | |
563 | estack_pop(stack, top, ax, bx); | |
564 | estack_ax_v = res; | |
565 | next_pc += sizeof(struct binary_op); | |
566 | PO; | |
567 | } | |
568 | OP(FILTER_OP_GT_S64): | |
569 | { | |
570 | int res; | |
571 | ||
572 | res = (estack_bx_v > estack_ax_v); | |
573 | estack_pop(stack, top, ax, bx); | |
574 | estack_ax_v = res; | |
575 | next_pc += sizeof(struct binary_op); | |
576 | PO; | |
577 | } | |
578 | OP(FILTER_OP_LT_S64): | |
579 | { | |
580 | int res; | |
581 | ||
582 | res = (estack_bx_v < estack_ax_v); | |
583 | estack_pop(stack, top, ax, bx); | |
584 | estack_ax_v = res; | |
585 | next_pc += sizeof(struct binary_op); | |
586 | PO; | |
587 | } | |
588 | OP(FILTER_OP_GE_S64): | |
589 | { | |
590 | int res; | |
591 | ||
592 | res = (estack_bx_v >= estack_ax_v); | |
593 | estack_pop(stack, top, ax, bx); | |
594 | estack_ax_v = res; | |
595 | next_pc += sizeof(struct binary_op); | |
596 | PO; | |
597 | } | |
598 | OP(FILTER_OP_LE_S64): | |
599 | { | |
600 | int res; | |
601 | ||
602 | res = (estack_bx_v <= estack_ax_v); | |
603 | estack_pop(stack, top, ax, bx); | |
604 | estack_ax_v = res; | |
605 | next_pc += sizeof(struct binary_op); | |
606 | PO; | |
607 | } | |
608 | ||
609 | OP(FILTER_OP_EQ_DOUBLE): | |
610 | OP(FILTER_OP_NE_DOUBLE): | |
611 | OP(FILTER_OP_GT_DOUBLE): | |
612 | OP(FILTER_OP_LT_DOUBLE): | |
613 | OP(FILTER_OP_GE_DOUBLE): | |
614 | OP(FILTER_OP_LE_DOUBLE): | |
615 | { | |
616 | BUG_ON(1); | |
617 | PO; | |
618 | } | |
619 | ||
620 | /* Mixed S64-double binary comparators */ | |
621 | OP(FILTER_OP_EQ_DOUBLE_S64): | |
622 | OP(FILTER_OP_NE_DOUBLE_S64): | |
623 | OP(FILTER_OP_GT_DOUBLE_S64): | |
624 | OP(FILTER_OP_LT_DOUBLE_S64): | |
625 | OP(FILTER_OP_GE_DOUBLE_S64): | |
626 | OP(FILTER_OP_LE_DOUBLE_S64): | |
627 | OP(FILTER_OP_EQ_S64_DOUBLE): | |
628 | OP(FILTER_OP_NE_S64_DOUBLE): | |
629 | OP(FILTER_OP_GT_S64_DOUBLE): | |
630 | OP(FILTER_OP_LT_S64_DOUBLE): | |
631 | OP(FILTER_OP_GE_S64_DOUBLE): | |
632 | OP(FILTER_OP_LE_S64_DOUBLE): | |
633 | { | |
634 | BUG_ON(1); | |
635 | PO; | |
636 | } | |
637 | ||
638 | /* unary */ | |
639 | OP(FILTER_OP_UNARY_PLUS): | |
640 | OP(FILTER_OP_UNARY_MINUS): | |
641 | OP(FILTER_OP_UNARY_NOT): | |
642 | printk(KERN_WARNING "unsupported non-specialized bytecode op %u\n", | |
643 | (unsigned int) *(filter_opcode_t *) pc); | |
644 | ret = -EINVAL; | |
645 | goto end; | |
646 | ||
647 | ||
648 | OP(FILTER_OP_UNARY_PLUS_S64): | |
649 | { | |
650 | next_pc += sizeof(struct unary_op); | |
651 | PO; | |
652 | } | |
653 | OP(FILTER_OP_UNARY_MINUS_S64): | |
654 | { | |
655 | estack_ax_v = -estack_ax_v; | |
656 | next_pc += sizeof(struct unary_op); | |
657 | PO; | |
658 | } | |
659 | OP(FILTER_OP_UNARY_PLUS_DOUBLE): | |
660 | OP(FILTER_OP_UNARY_MINUS_DOUBLE): | |
661 | { | |
662 | BUG_ON(1); | |
663 | PO; | |
664 | } | |
665 | OP(FILTER_OP_UNARY_NOT_S64): | |
666 | { | |
667 | estack_ax_v = !estack_ax_v; | |
668 | next_pc += sizeof(struct unary_op); | |
669 | PO; | |
670 | } | |
671 | OP(FILTER_OP_UNARY_NOT_DOUBLE): | |
672 | { | |
673 | BUG_ON(1); | |
674 | PO; | |
675 | } | |
676 | ||
677 | /* logical */ | |
678 | OP(FILTER_OP_AND): | |
679 | { | |
680 | struct logical_op *insn = (struct logical_op *) pc; | |
681 | ||
682 | /* If AX is 0, skip and evaluate to 0 */ | |
683 | if (unlikely(estack_ax_v == 0)) { | |
684 | dbg_printk("Jumping to bytecode offset %u\n", | |
685 | (unsigned int) insn->skip_offset); | |
686 | next_pc = start_pc + insn->skip_offset; | |
687 | } else { | |
688 | /* Pop 1 when jump not taken */ | |
689 | estack_pop(stack, top, ax, bx); | |
690 | next_pc += sizeof(struct logical_op); | |
691 | } | |
692 | PO; | |
693 | } | |
694 | OP(FILTER_OP_OR): | |
695 | { | |
696 | struct logical_op *insn = (struct logical_op *) pc; | |
697 | ||
698 | /* If AX is nonzero, skip and evaluate to 1 */ | |
699 | ||
700 | if (unlikely(estack_ax_v != 0)) { | |
701 | estack_ax_v = 1; | |
702 | dbg_printk("Jumping to bytecode offset %u\n", | |
703 | (unsigned int) insn->skip_offset); | |
704 | next_pc = start_pc + insn->skip_offset; | |
705 | } else { | |
706 | /* Pop 1 when jump not taken */ | |
707 | estack_pop(stack, top, ax, bx); | |
708 | next_pc += sizeof(struct logical_op); | |
709 | } | |
710 | PO; | |
711 | } | |
712 | ||
713 | ||
714 | /* load field ref */ | |
715 | OP(FILTER_OP_LOAD_FIELD_REF_STRING): | |
716 | { | |
717 | struct load_op *insn = (struct load_op *) pc; | |
718 | struct field_ref *ref = (struct field_ref *) insn->data; | |
719 | ||
720 | dbg_printk("load field ref offset %u type string\n", | |
721 | ref->offset); | |
722 | estack_push(stack, top, ax, bx); | |
723 | estack_ax(stack, top)->u.s.str = | |
724 | *(const char * const *) &filter_stack_data[ref->offset]; | |
725 | if (unlikely(!estack_ax(stack, top)->u.s.str)) { | |
726 | dbg_printk("Filter warning: loading a NULL string.\n"); | |
727 | ret = -EINVAL; | |
728 | goto end; | |
729 | } | |
cbc19040 | 730 | estack_ax(stack, top)->u.s.seq_len = LTTNG_SIZE_MAX; |
02aca193 PP |
731 | estack_ax(stack, top)->u.s.literal_type = |
732 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
f127e61e | 733 | estack_ax(stack, top)->u.s.user = 0; |
07dfc1d0 MD |
734 | dbg_printk("ref load string %s\n", estack_ax(stack, top)->u.s.str); |
735 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
736 | PO; | |
737 | } | |
738 | ||
739 | OP(FILTER_OP_LOAD_FIELD_REF_SEQUENCE): | |
740 | { | |
741 | struct load_op *insn = (struct load_op *) pc; | |
742 | struct field_ref *ref = (struct field_ref *) insn->data; | |
743 | ||
744 | dbg_printk("load field ref offset %u type sequence\n", | |
745 | ref->offset); | |
746 | estack_push(stack, top, ax, bx); | |
747 | estack_ax(stack, top)->u.s.seq_len = | |
748 | *(unsigned long *) &filter_stack_data[ref->offset]; | |
749 | estack_ax(stack, top)->u.s.str = | |
750 | *(const char **) (&filter_stack_data[ref->offset | |
751 | + sizeof(unsigned long)]); | |
752 | if (unlikely(!estack_ax(stack, top)->u.s.str)) { | |
753 | dbg_printk("Filter warning: loading a NULL sequence.\n"); | |
754 | ret = -EINVAL; | |
755 | goto end; | |
756 | } | |
02aca193 PP |
757 | estack_ax(stack, top)->u.s.literal_type = |
758 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
f127e61e | 759 | estack_ax(stack, top)->u.s.user = 0; |
07dfc1d0 MD |
760 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); |
761 | PO; | |
762 | } | |
763 | ||
764 | OP(FILTER_OP_LOAD_FIELD_REF_S64): | |
765 | { | |
766 | struct load_op *insn = (struct load_op *) pc; | |
767 | struct field_ref *ref = (struct field_ref *) insn->data; | |
768 | ||
769 | dbg_printk("load field ref offset %u type s64\n", | |
770 | ref->offset); | |
771 | estack_push(stack, top, ax, bx); | |
772 | estack_ax_v = | |
773 | ((struct literal_numeric *) &filter_stack_data[ref->offset])->v; | |
774 | dbg_printk("ref load s64 %lld\n", | |
775 | (long long) estack_ax_v); | |
776 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
777 | PO; | |
778 | } | |
779 | ||
780 | OP(FILTER_OP_LOAD_FIELD_REF_DOUBLE): | |
781 | { | |
782 | BUG_ON(1); | |
783 | PO; | |
784 | } | |
785 | ||
786 | /* load from immediate operand */ | |
787 | OP(FILTER_OP_LOAD_STRING): | |
788 | { | |
789 | struct load_op *insn = (struct load_op *) pc; | |
790 | ||
791 | dbg_printk("load string %s\n", insn->data); | |
792 | estack_push(stack, top, ax, bx); | |
793 | estack_ax(stack, top)->u.s.str = insn->data; | |
cbc19040 | 794 | estack_ax(stack, top)->u.s.seq_len = LTTNG_SIZE_MAX; |
02aca193 PP |
795 | estack_ax(stack, top)->u.s.literal_type = |
796 | ESTACK_STRING_LITERAL_TYPE_PLAIN; | |
797 | estack_ax(stack, top)->u.s.user = 0; | |
798 | next_pc += sizeof(struct load_op) + strlen(insn->data) + 1; | |
799 | PO; | |
800 | } | |
801 | ||
802 | OP(FILTER_OP_LOAD_STAR_GLOB_STRING): | |
803 | { | |
804 | struct load_op *insn = (struct load_op *) pc; | |
805 | ||
806 | dbg_printk("load globbing pattern %s\n", insn->data); | |
807 | estack_push(stack, top, ax, bx); | |
808 | estack_ax(stack, top)->u.s.str = insn->data; | |
cbc19040 | 809 | estack_ax(stack, top)->u.s.seq_len = LTTNG_SIZE_MAX; |
02aca193 PP |
810 | estack_ax(stack, top)->u.s.literal_type = |
811 | ESTACK_STRING_LITERAL_TYPE_STAR_GLOB; | |
f127e61e | 812 | estack_ax(stack, top)->u.s.user = 0; |
07dfc1d0 MD |
813 | next_pc += sizeof(struct load_op) + strlen(insn->data) + 1; |
814 | PO; | |
815 | } | |
816 | ||
817 | OP(FILTER_OP_LOAD_S64): | |
818 | { | |
819 | struct load_op *insn = (struct load_op *) pc; | |
820 | ||
821 | estack_push(stack, top, ax, bx); | |
822 | estack_ax_v = ((struct literal_numeric *) insn->data)->v; | |
823 | dbg_printk("load s64 %lld\n", | |
824 | (long long) estack_ax_v); | |
825 | next_pc += sizeof(struct load_op) | |
826 | + sizeof(struct literal_numeric); | |
827 | PO; | |
828 | } | |
829 | ||
830 | OP(FILTER_OP_LOAD_DOUBLE): | |
831 | { | |
832 | BUG_ON(1); | |
833 | PO; | |
834 | } | |
835 | ||
836 | /* cast */ | |
837 | OP(FILTER_OP_CAST_TO_S64): | |
838 | printk(KERN_WARNING "unsupported non-specialized bytecode op %u\n", | |
839 | (unsigned int) *(filter_opcode_t *) pc); | |
840 | ret = -EINVAL; | |
841 | goto end; | |
842 | ||
843 | OP(FILTER_OP_CAST_DOUBLE_TO_S64): | |
844 | { | |
845 | BUG_ON(1); | |
846 | PO; | |
847 | } | |
848 | ||
849 | OP(FILTER_OP_CAST_NOP): | |
850 | { | |
851 | next_pc += sizeof(struct cast_op); | |
852 | PO; | |
853 | } | |
854 | ||
855 | /* get context ref */ | |
856 | OP(FILTER_OP_GET_CONTEXT_REF_STRING): | |
857 | { | |
858 | struct load_op *insn = (struct load_op *) pc; | |
859 | struct field_ref *ref = (struct field_ref *) insn->data; | |
860 | struct lttng_ctx_field *ctx_field; | |
861 | union lttng_ctx_value v; | |
862 | ||
863 | dbg_printk("get context ref offset %u type string\n", | |
864 | ref->offset); | |
865 | ctx_field = <tng_static_ctx->fields[ref->offset]; | |
79150a49 | 866 | ctx_field->get_value(ctx_field, lttng_probe_ctx, &v); |
07dfc1d0 MD |
867 | estack_push(stack, top, ax, bx); |
868 | estack_ax(stack, top)->u.s.str = v.str; | |
869 | if (unlikely(!estack_ax(stack, top)->u.s.str)) { | |
870 | dbg_printk("Filter warning: loading a NULL string.\n"); | |
871 | ret = -EINVAL; | |
872 | goto end; | |
873 | } | |
cbc19040 | 874 | estack_ax(stack, top)->u.s.seq_len = LTTNG_SIZE_MAX; |
02aca193 PP |
875 | estack_ax(stack, top)->u.s.literal_type = |
876 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
f127e61e | 877 | estack_ax(stack, top)->u.s.user = 0; |
07dfc1d0 MD |
878 | dbg_printk("ref get context string %s\n", estack_ax(stack, top)->u.s.str); |
879 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
880 | PO; | |
881 | } | |
882 | ||
883 | OP(FILTER_OP_GET_CONTEXT_REF_S64): | |
884 | { | |
885 | struct load_op *insn = (struct load_op *) pc; | |
886 | struct field_ref *ref = (struct field_ref *) insn->data; | |
887 | struct lttng_ctx_field *ctx_field; | |
888 | union lttng_ctx_value v; | |
889 | ||
890 | dbg_printk("get context ref offset %u type s64\n", | |
891 | ref->offset); | |
892 | ctx_field = <tng_static_ctx->fields[ref->offset]; | |
79150a49 | 893 | ctx_field->get_value(ctx_field, lttng_probe_ctx, &v); |
07dfc1d0 MD |
894 | estack_push(stack, top, ax, bx); |
895 | estack_ax_v = v.s64; | |
896 | dbg_printk("ref get context s64 %lld\n", | |
897 | (long long) estack_ax_v); | |
898 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
899 | PO; | |
900 | } | |
901 | ||
902 | OP(FILTER_OP_GET_CONTEXT_REF_DOUBLE): | |
903 | { | |
904 | BUG_ON(1); | |
905 | PO; | |
906 | } | |
907 | ||
f127e61e MD |
908 | /* load userspace field ref */ |
909 | OP(FILTER_OP_LOAD_FIELD_REF_USER_STRING): | |
910 | { | |
911 | struct load_op *insn = (struct load_op *) pc; | |
912 | struct field_ref *ref = (struct field_ref *) insn->data; | |
913 | ||
914 | dbg_printk("load field ref offset %u type user string\n", | |
915 | ref->offset); | |
916 | estack_push(stack, top, ax, bx); | |
5b4ad89f | 917 | estack_ax(stack, top)->u.s.user_str = |
f127e61e MD |
918 | *(const char * const *) &filter_stack_data[ref->offset]; |
919 | if (unlikely(!estack_ax(stack, top)->u.s.str)) { | |
920 | dbg_printk("Filter warning: loading a NULL string.\n"); | |
921 | ret = -EINVAL; | |
922 | goto end; | |
923 | } | |
cbc19040 | 924 | estack_ax(stack, top)->u.s.seq_len = LTTNG_SIZE_MAX; |
02aca193 PP |
925 | estack_ax(stack, top)->u.s.literal_type = |
926 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
f127e61e MD |
927 | estack_ax(stack, top)->u.s.user = 1; |
928 | dbg_printk("ref load string %s\n", estack_ax(stack, top)->u.s.str); | |
929 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
930 | PO; | |
931 | } | |
932 | ||
933 | OP(FILTER_OP_LOAD_FIELD_REF_USER_SEQUENCE): | |
934 | { | |
935 | struct load_op *insn = (struct load_op *) pc; | |
936 | struct field_ref *ref = (struct field_ref *) insn->data; | |
937 | ||
938 | dbg_printk("load field ref offset %u type user sequence\n", | |
939 | ref->offset); | |
940 | estack_push(stack, top, ax, bx); | |
941 | estack_ax(stack, top)->u.s.seq_len = | |
942 | *(unsigned long *) &filter_stack_data[ref->offset]; | |
5b4ad89f | 943 | estack_ax(stack, top)->u.s.user_str = |
f127e61e MD |
944 | *(const char **) (&filter_stack_data[ref->offset |
945 | + sizeof(unsigned long)]); | |
946 | if (unlikely(!estack_ax(stack, top)->u.s.str)) { | |
947 | dbg_printk("Filter warning: loading a NULL sequence.\n"); | |
948 | ret = -EINVAL; | |
949 | goto end; | |
950 | } | |
02aca193 PP |
951 | estack_ax(stack, top)->u.s.literal_type = |
952 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
f127e61e MD |
953 | estack_ax(stack, top)->u.s.user = 1; |
954 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
955 | PO; | |
956 | } | |
957 | ||
07dfc1d0 MD |
958 | END_OP |
959 | end: | |
960 | /* return 0 (discard) on error */ | |
961 | if (ret) | |
962 | return 0; | |
963 | return retval; | |
964 | } | |
965 | ||
966 | #undef START_OP | |
967 | #undef OP | |
968 | #undef PO | |
969 | #undef END_OP |