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 | ||
0039dbe9 | 27 | #include <wrapper/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. */ | |
0039dbe9 | 49 | if (unlikely(!lttng_access_ok(VERIFY_READ, |
f127e61e MD |
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; | |
02aca193 PP |
100 | int result; |
101 | struct estack_entry *pattern_reg; | |
102 | struct estack_entry *candidate_reg; | |
103 | ||
9d209ed1 | 104 | /* Disable the page fault handler when reading from userspace. */ |
02aca193 PP |
105 | if (estack_bx(stack, top)->u.s.user |
106 | || estack_ax(stack, top)->u.s.user) { | |
107 | has_user = true; | |
02aca193 PP |
108 | pagefault_disable(); |
109 | } | |
110 | ||
111 | /* Find out which side is the pattern vs. the candidate. */ | |
112 | if (estack_ax(stack, top)->u.s.literal_type == ESTACK_STRING_LITERAL_TYPE_STAR_GLOB) { | |
113 | pattern_reg = estack_ax(stack, top); | |
114 | candidate_reg = estack_bx(stack, top); | |
115 | } else { | |
116 | pattern_reg = estack_bx(stack, top); | |
117 | candidate_reg = estack_ax(stack, top); | |
118 | } | |
119 | ||
120 | /* Perform the match operation. */ | |
121 | result = !strutils_star_glob_match_char_cb(get_char_at_cb, | |
122 | pattern_reg, get_char_at_cb, candidate_reg); | |
9d209ed1 | 123 | if (has_user) |
02aca193 | 124 | pagefault_enable(); |
02aca193 PP |
125 | |
126 | return result; | |
127 | } | |
128 | ||
07dfc1d0 MD |
129 | static |
130 | int stack_strcmp(struct estack *stack, int top, const char *cmp_type) | |
131 | { | |
f127e61e MD |
132 | size_t offset_bx = 0, offset_ax = 0; |
133 | int diff, has_user = 0; | |
f127e61e MD |
134 | |
135 | if (estack_bx(stack, top)->u.s.user | |
136 | || estack_ax(stack, top)->u.s.user) { | |
137 | has_user = 1; | |
f127e61e MD |
138 | pagefault_disable(); |
139 | } | |
07dfc1d0 MD |
140 | |
141 | for (;;) { | |
f127e61e | 142 | int ret; |
07dfc1d0 | 143 | int escaped_r0 = 0; |
f127e61e | 144 | char char_bx, char_ax; |
07dfc1d0 | 145 | |
f127e61e MD |
146 | char_bx = get_char(estack_bx(stack, top), offset_bx); |
147 | char_ax = get_char(estack_ax(stack, top), offset_ax); | |
148 | ||
149 | if (unlikely(char_bx == '\0')) { | |
150 | if (char_ax == '\0') { | |
151 | diff = 0; | |
152 | break; | |
07dfc1d0 | 153 | } else { |
02aca193 PP |
154 | if (estack_ax(stack, top)->u.s.literal_type == |
155 | ESTACK_STRING_LITERAL_TYPE_PLAIN) { | |
f127e61e MD |
156 | ret = parse_char(estack_ax(stack, top), |
157 | &char_ax, &offset_ax); | |
158 | if (ret == -1) { | |
159 | diff = 0; | |
160 | break; | |
161 | } | |
07dfc1d0 | 162 | } |
f127e61e MD |
163 | diff = -1; |
164 | break; | |
07dfc1d0 MD |
165 | } |
166 | } | |
f127e61e | 167 | if (unlikely(char_ax == '\0')) { |
02aca193 PP |
168 | if (estack_bx(stack, top)->u.s.literal_type == |
169 | ESTACK_STRING_LITERAL_TYPE_PLAIN) { | |
abfd272b MD |
170 | ret = parse_char(estack_bx(stack, top), |
171 | &char_bx, &offset_bx); | |
172 | if (ret == -1) { | |
173 | diff = 0; | |
174 | break; | |
07dfc1d0 | 175 | } |
07dfc1d0 | 176 | } |
abfd272b MD |
177 | diff = 1; |
178 | break; | |
07dfc1d0 | 179 | } |
02aca193 PP |
180 | if (estack_bx(stack, top)->u.s.literal_type == |
181 | ESTACK_STRING_LITERAL_TYPE_PLAIN) { | |
f127e61e MD |
182 | ret = parse_char(estack_bx(stack, top), |
183 | &char_bx, &offset_bx); | |
07dfc1d0 | 184 | if (ret == -1) { |
f127e61e MD |
185 | diff = 0; |
186 | break; | |
07dfc1d0 MD |
187 | } else if (ret == -2) { |
188 | escaped_r0 = 1; | |
189 | } | |
190 | /* else compare both char */ | |
191 | } | |
02aca193 PP |
192 | if (estack_ax(stack, top)->u.s.literal_type == |
193 | ESTACK_STRING_LITERAL_TYPE_PLAIN) { | |
f127e61e MD |
194 | ret = parse_char(estack_ax(stack, top), |
195 | &char_ax, &offset_ax); | |
07dfc1d0 | 196 | if (ret == -1) { |
f127e61e MD |
197 | diff = 0; |
198 | break; | |
07dfc1d0 | 199 | } else if (ret == -2) { |
f127e61e MD |
200 | if (!escaped_r0) { |
201 | diff = -1; | |
202 | break; | |
203 | } | |
07dfc1d0 | 204 | } else { |
f127e61e MD |
205 | if (escaped_r0) { |
206 | diff = 1; | |
207 | break; | |
208 | } | |
07dfc1d0 MD |
209 | } |
210 | } else { | |
f127e61e MD |
211 | if (escaped_r0) { |
212 | diff = 1; | |
213 | break; | |
214 | } | |
07dfc1d0 | 215 | } |
f127e61e | 216 | diff = char_bx - char_ax; |
07dfc1d0 MD |
217 | if (diff != 0) |
218 | break; | |
f127e61e MD |
219 | offset_bx++; |
220 | offset_ax++; | |
221 | } | |
9d209ed1 | 222 | if (has_user) |
f127e61e | 223 | pagefault_enable(); |
9d209ed1 | 224 | |
07dfc1d0 MD |
225 | return diff; |
226 | } | |
227 | ||
228 | uint64_t lttng_filter_false(void *filter_data, | |
79150a49 | 229 | struct lttng_probe_ctx *lttng_probe_ctx, |
07dfc1d0 MD |
230 | const char *filter_stack_data) |
231 | { | |
232 | return 0; | |
233 | } | |
234 | ||
235 | #ifdef INTERPRETER_USE_SWITCH | |
236 | ||
237 | /* | |
238 | * Fallback for compilers that do not support taking address of labels. | |
239 | */ | |
240 | ||
241 | #define START_OP \ | |
242 | start_pc = &bytecode->data[0]; \ | |
243 | for (pc = next_pc = start_pc; pc - start_pc < bytecode->len; \ | |
244 | pc = next_pc) { \ | |
245 | dbg_printk("Executing op %s (%u)\n", \ | |
246 | lttng_filter_print_op((unsigned int) *(filter_opcode_t *) pc), \ | |
247 | (unsigned int) *(filter_opcode_t *) pc); \ | |
248 | switch (*(filter_opcode_t *) pc) { | |
249 | ||
250 | #define OP(name) case name | |
251 | ||
252 | #define PO break | |
253 | ||
254 | #define END_OP } \ | |
255 | } | |
256 | ||
257 | #else | |
258 | ||
259 | /* | |
260 | * Dispatch-table based interpreter. | |
261 | */ | |
262 | ||
263 | #define START_OP \ | |
264 | start_pc = &bytecode->data[0]; \ | |
265 | pc = next_pc = start_pc; \ | |
266 | if (unlikely(pc - start_pc >= bytecode->len)) \ | |
267 | goto end; \ | |
268 | goto *dispatch[*(filter_opcode_t *) pc]; | |
269 | ||
270 | #define OP(name) \ | |
271 | LABEL_##name | |
272 | ||
273 | #define PO \ | |
274 | pc = next_pc; \ | |
275 | goto *dispatch[*(filter_opcode_t *) pc]; | |
276 | ||
277 | #define END_OP | |
278 | ||
279 | #endif | |
280 | ||
281 | /* | |
282 | * Return 0 (discard), or raise the 0x1 flag (log event). | |
283 | * Currently, other flags are kept for future extensions and have no | |
284 | * effect. | |
285 | */ | |
286 | uint64_t lttng_filter_interpret_bytecode(void *filter_data, | |
79150a49 | 287 | struct lttng_probe_ctx *lttng_probe_ctx, |
07dfc1d0 MD |
288 | const char *filter_stack_data) |
289 | { | |
290 | struct bytecode_runtime *bytecode = filter_data; | |
291 | void *pc, *next_pc, *start_pc; | |
292 | int ret = -EINVAL; | |
293 | uint64_t retval = 0; | |
294 | struct estack _stack; | |
295 | struct estack *stack = &_stack; | |
296 | register int64_t ax = 0, bx = 0; | |
297 | register int top = FILTER_STACK_EMPTY; | |
298 | #ifndef INTERPRETER_USE_SWITCH | |
299 | static void *dispatch[NR_FILTER_OPS] = { | |
300 | [ FILTER_OP_UNKNOWN ] = &&LABEL_FILTER_OP_UNKNOWN, | |
301 | ||
302 | [ FILTER_OP_RETURN ] = &&LABEL_FILTER_OP_RETURN, | |
303 | ||
304 | /* binary */ | |
305 | [ FILTER_OP_MUL ] = &&LABEL_FILTER_OP_MUL, | |
306 | [ FILTER_OP_DIV ] = &&LABEL_FILTER_OP_DIV, | |
307 | [ FILTER_OP_MOD ] = &&LABEL_FILTER_OP_MOD, | |
308 | [ FILTER_OP_PLUS ] = &&LABEL_FILTER_OP_PLUS, | |
309 | [ FILTER_OP_MINUS ] = &&LABEL_FILTER_OP_MINUS, | |
310 | [ FILTER_OP_RSHIFT ] = &&LABEL_FILTER_OP_RSHIFT, | |
311 | [ FILTER_OP_LSHIFT ] = &&LABEL_FILTER_OP_LSHIFT, | |
312 | [ FILTER_OP_BIN_AND ] = &&LABEL_FILTER_OP_BIN_AND, | |
313 | [ FILTER_OP_BIN_OR ] = &&LABEL_FILTER_OP_BIN_OR, | |
314 | [ FILTER_OP_BIN_XOR ] = &&LABEL_FILTER_OP_BIN_XOR, | |
315 | ||
316 | /* binary comparators */ | |
317 | [ FILTER_OP_EQ ] = &&LABEL_FILTER_OP_EQ, | |
318 | [ FILTER_OP_NE ] = &&LABEL_FILTER_OP_NE, | |
319 | [ FILTER_OP_GT ] = &&LABEL_FILTER_OP_GT, | |
320 | [ FILTER_OP_LT ] = &&LABEL_FILTER_OP_LT, | |
321 | [ FILTER_OP_GE ] = &&LABEL_FILTER_OP_GE, | |
322 | [ FILTER_OP_LE ] = &&LABEL_FILTER_OP_LE, | |
323 | ||
324 | /* string binary comparator */ | |
325 | [ FILTER_OP_EQ_STRING ] = &&LABEL_FILTER_OP_EQ_STRING, | |
326 | [ FILTER_OP_NE_STRING ] = &&LABEL_FILTER_OP_NE_STRING, | |
327 | [ FILTER_OP_GT_STRING ] = &&LABEL_FILTER_OP_GT_STRING, | |
328 | [ FILTER_OP_LT_STRING ] = &&LABEL_FILTER_OP_LT_STRING, | |
329 | [ FILTER_OP_GE_STRING ] = &&LABEL_FILTER_OP_GE_STRING, | |
330 | [ FILTER_OP_LE_STRING ] = &&LABEL_FILTER_OP_LE_STRING, | |
331 | ||
02aca193 PP |
332 | /* globbing pattern binary comparator */ |
333 | [ FILTER_OP_EQ_STAR_GLOB_STRING ] = &&LABEL_FILTER_OP_EQ_STAR_GLOB_STRING, | |
334 | [ FILTER_OP_NE_STAR_GLOB_STRING ] = &&LABEL_FILTER_OP_NE_STAR_GLOB_STRING, | |
335 | ||
07dfc1d0 MD |
336 | /* s64 binary comparator */ |
337 | [ FILTER_OP_EQ_S64 ] = &&LABEL_FILTER_OP_EQ_S64, | |
338 | [ FILTER_OP_NE_S64 ] = &&LABEL_FILTER_OP_NE_S64, | |
339 | [ FILTER_OP_GT_S64 ] = &&LABEL_FILTER_OP_GT_S64, | |
340 | [ FILTER_OP_LT_S64 ] = &&LABEL_FILTER_OP_LT_S64, | |
341 | [ FILTER_OP_GE_S64 ] = &&LABEL_FILTER_OP_GE_S64, | |
342 | [ FILTER_OP_LE_S64 ] = &&LABEL_FILTER_OP_LE_S64, | |
343 | ||
344 | /* double binary comparator */ | |
345 | [ FILTER_OP_EQ_DOUBLE ] = &&LABEL_FILTER_OP_EQ_DOUBLE, | |
346 | [ FILTER_OP_NE_DOUBLE ] = &&LABEL_FILTER_OP_NE_DOUBLE, | |
347 | [ FILTER_OP_GT_DOUBLE ] = &&LABEL_FILTER_OP_GT_DOUBLE, | |
348 | [ FILTER_OP_LT_DOUBLE ] = &&LABEL_FILTER_OP_LT_DOUBLE, | |
349 | [ FILTER_OP_GE_DOUBLE ] = &&LABEL_FILTER_OP_GE_DOUBLE, | |
350 | [ FILTER_OP_LE_DOUBLE ] = &&LABEL_FILTER_OP_LE_DOUBLE, | |
351 | ||
352 | /* Mixed S64-double binary comparators */ | |
353 | [ FILTER_OP_EQ_DOUBLE_S64 ] = &&LABEL_FILTER_OP_EQ_DOUBLE_S64, | |
354 | [ FILTER_OP_NE_DOUBLE_S64 ] = &&LABEL_FILTER_OP_NE_DOUBLE_S64, | |
355 | [ FILTER_OP_GT_DOUBLE_S64 ] = &&LABEL_FILTER_OP_GT_DOUBLE_S64, | |
356 | [ FILTER_OP_LT_DOUBLE_S64 ] = &&LABEL_FILTER_OP_LT_DOUBLE_S64, | |
357 | [ FILTER_OP_GE_DOUBLE_S64 ] = &&LABEL_FILTER_OP_GE_DOUBLE_S64, | |
358 | [ FILTER_OP_LE_DOUBLE_S64 ] = &&LABEL_FILTER_OP_LE_DOUBLE_S64, | |
359 | ||
360 | [ FILTER_OP_EQ_S64_DOUBLE ] = &&LABEL_FILTER_OP_EQ_S64_DOUBLE, | |
361 | [ FILTER_OP_NE_S64_DOUBLE ] = &&LABEL_FILTER_OP_NE_S64_DOUBLE, | |
362 | [ FILTER_OP_GT_S64_DOUBLE ] = &&LABEL_FILTER_OP_GT_S64_DOUBLE, | |
363 | [ FILTER_OP_LT_S64_DOUBLE ] = &&LABEL_FILTER_OP_LT_S64_DOUBLE, | |
364 | [ FILTER_OP_GE_S64_DOUBLE ] = &&LABEL_FILTER_OP_GE_S64_DOUBLE, | |
365 | [ FILTER_OP_LE_S64_DOUBLE ] = &&LABEL_FILTER_OP_LE_S64_DOUBLE, | |
366 | ||
367 | /* unary */ | |
368 | [ FILTER_OP_UNARY_PLUS ] = &&LABEL_FILTER_OP_UNARY_PLUS, | |
369 | [ FILTER_OP_UNARY_MINUS ] = &&LABEL_FILTER_OP_UNARY_MINUS, | |
370 | [ FILTER_OP_UNARY_NOT ] = &&LABEL_FILTER_OP_UNARY_NOT, | |
371 | [ FILTER_OP_UNARY_PLUS_S64 ] = &&LABEL_FILTER_OP_UNARY_PLUS_S64, | |
372 | [ FILTER_OP_UNARY_MINUS_S64 ] = &&LABEL_FILTER_OP_UNARY_MINUS_S64, | |
373 | [ FILTER_OP_UNARY_NOT_S64 ] = &&LABEL_FILTER_OP_UNARY_NOT_S64, | |
374 | [ FILTER_OP_UNARY_PLUS_DOUBLE ] = &&LABEL_FILTER_OP_UNARY_PLUS_DOUBLE, | |
375 | [ FILTER_OP_UNARY_MINUS_DOUBLE ] = &&LABEL_FILTER_OP_UNARY_MINUS_DOUBLE, | |
376 | [ FILTER_OP_UNARY_NOT_DOUBLE ] = &&LABEL_FILTER_OP_UNARY_NOT_DOUBLE, | |
377 | ||
378 | /* logical */ | |
379 | [ FILTER_OP_AND ] = &&LABEL_FILTER_OP_AND, | |
380 | [ FILTER_OP_OR ] = &&LABEL_FILTER_OP_OR, | |
381 | ||
382 | /* load field ref */ | |
383 | [ FILTER_OP_LOAD_FIELD_REF ] = &&LABEL_FILTER_OP_LOAD_FIELD_REF, | |
384 | [ FILTER_OP_LOAD_FIELD_REF_STRING ] = &&LABEL_FILTER_OP_LOAD_FIELD_REF_STRING, | |
385 | [ FILTER_OP_LOAD_FIELD_REF_SEQUENCE ] = &&LABEL_FILTER_OP_LOAD_FIELD_REF_SEQUENCE, | |
386 | [ FILTER_OP_LOAD_FIELD_REF_S64 ] = &&LABEL_FILTER_OP_LOAD_FIELD_REF_S64, | |
387 | [ FILTER_OP_LOAD_FIELD_REF_DOUBLE ] = &&LABEL_FILTER_OP_LOAD_FIELD_REF_DOUBLE, | |
388 | ||
389 | /* load from immediate operand */ | |
390 | [ FILTER_OP_LOAD_STRING ] = &&LABEL_FILTER_OP_LOAD_STRING, | |
02aca193 | 391 | [ FILTER_OP_LOAD_STAR_GLOB_STRING ] = &&LABEL_FILTER_OP_LOAD_STAR_GLOB_STRING, |
07dfc1d0 MD |
392 | [ FILTER_OP_LOAD_S64 ] = &&LABEL_FILTER_OP_LOAD_S64, |
393 | [ FILTER_OP_LOAD_DOUBLE ] = &&LABEL_FILTER_OP_LOAD_DOUBLE, | |
394 | ||
395 | /* cast */ | |
396 | [ FILTER_OP_CAST_TO_S64 ] = &&LABEL_FILTER_OP_CAST_TO_S64, | |
397 | [ FILTER_OP_CAST_DOUBLE_TO_S64 ] = &&LABEL_FILTER_OP_CAST_DOUBLE_TO_S64, | |
398 | [ FILTER_OP_CAST_NOP ] = &&LABEL_FILTER_OP_CAST_NOP, | |
399 | ||
400 | /* get context ref */ | |
401 | [ FILTER_OP_GET_CONTEXT_REF ] = &&LABEL_FILTER_OP_GET_CONTEXT_REF, | |
402 | [ FILTER_OP_GET_CONTEXT_REF_STRING ] = &&LABEL_FILTER_OP_GET_CONTEXT_REF_STRING, | |
403 | [ FILTER_OP_GET_CONTEXT_REF_S64 ] = &&LABEL_FILTER_OP_GET_CONTEXT_REF_S64, | |
404 | [ FILTER_OP_GET_CONTEXT_REF_DOUBLE ] = &&LABEL_FILTER_OP_GET_CONTEXT_REF_DOUBLE, | |
f127e61e MD |
405 | |
406 | /* load userspace field ref */ | |
407 | [ FILTER_OP_LOAD_FIELD_REF_USER_STRING ] = &&LABEL_FILTER_OP_LOAD_FIELD_REF_USER_STRING, | |
408 | [ FILTER_OP_LOAD_FIELD_REF_USER_SEQUENCE ] = &&LABEL_FILTER_OP_LOAD_FIELD_REF_USER_SEQUENCE, | |
07dfc1d0 MD |
409 | }; |
410 | #endif /* #ifndef INTERPRETER_USE_SWITCH */ | |
411 | ||
412 | START_OP | |
413 | ||
414 | OP(FILTER_OP_UNKNOWN): | |
415 | OP(FILTER_OP_LOAD_FIELD_REF): | |
416 | OP(FILTER_OP_GET_CONTEXT_REF): | |
417 | #ifdef INTERPRETER_USE_SWITCH | |
418 | default: | |
419 | #endif /* INTERPRETER_USE_SWITCH */ | |
420 | printk(KERN_WARNING "unknown bytecode op %u\n", | |
421 | (unsigned int) *(filter_opcode_t *) pc); | |
422 | ret = -EINVAL; | |
423 | goto end; | |
424 | ||
425 | OP(FILTER_OP_RETURN): | |
426 | /* LTTNG_FILTER_DISCARD or LTTNG_FILTER_RECORD_FLAG */ | |
427 | retval = !!estack_ax_v; | |
428 | ret = 0; | |
429 | goto end; | |
430 | ||
431 | /* binary */ | |
432 | OP(FILTER_OP_MUL): | |
433 | OP(FILTER_OP_DIV): | |
434 | OP(FILTER_OP_MOD): | |
435 | OP(FILTER_OP_PLUS): | |
436 | OP(FILTER_OP_MINUS): | |
437 | OP(FILTER_OP_RSHIFT): | |
438 | OP(FILTER_OP_LSHIFT): | |
439 | OP(FILTER_OP_BIN_AND): | |
440 | OP(FILTER_OP_BIN_OR): | |
441 | OP(FILTER_OP_BIN_XOR): | |
442 | printk(KERN_WARNING "unsupported bytecode op %u\n", | |
443 | (unsigned int) *(filter_opcode_t *) pc); | |
444 | ret = -EINVAL; | |
445 | goto end; | |
446 | ||
447 | OP(FILTER_OP_EQ): | |
448 | OP(FILTER_OP_NE): | |
449 | OP(FILTER_OP_GT): | |
450 | OP(FILTER_OP_LT): | |
451 | OP(FILTER_OP_GE): | |
452 | OP(FILTER_OP_LE): | |
453 | printk(KERN_WARNING "unsupported non-specialized bytecode op %u\n", | |
454 | (unsigned int) *(filter_opcode_t *) pc); | |
455 | ret = -EINVAL; | |
456 | goto end; | |
457 | ||
458 | OP(FILTER_OP_EQ_STRING): | |
459 | { | |
460 | int res; | |
461 | ||
462 | res = (stack_strcmp(stack, top, "==") == 0); | |
463 | estack_pop(stack, top, ax, bx); | |
464 | estack_ax_v = res; | |
465 | next_pc += sizeof(struct binary_op); | |
466 | PO; | |
467 | } | |
468 | OP(FILTER_OP_NE_STRING): | |
469 | { | |
470 | int res; | |
471 | ||
472 | res = (stack_strcmp(stack, top, "!=") != 0); | |
473 | estack_pop(stack, top, ax, bx); | |
474 | estack_ax_v = res; | |
475 | next_pc += sizeof(struct binary_op); | |
476 | PO; | |
477 | } | |
478 | OP(FILTER_OP_GT_STRING): | |
479 | { | |
480 | int res; | |
481 | ||
482 | res = (stack_strcmp(stack, top, ">") > 0); | |
483 | estack_pop(stack, top, ax, bx); | |
484 | estack_ax_v = res; | |
485 | next_pc += sizeof(struct binary_op); | |
486 | PO; | |
487 | } | |
488 | OP(FILTER_OP_LT_STRING): | |
489 | { | |
490 | int res; | |
491 | ||
492 | res = (stack_strcmp(stack, top, "<") < 0); | |
493 | estack_pop(stack, top, ax, bx); | |
494 | estack_ax_v = res; | |
495 | next_pc += sizeof(struct binary_op); | |
496 | PO; | |
497 | } | |
498 | OP(FILTER_OP_GE_STRING): | |
499 | { | |
500 | int res; | |
501 | ||
502 | res = (stack_strcmp(stack, top, ">=") >= 0); | |
503 | estack_pop(stack, top, ax, bx); | |
504 | estack_ax_v = res; | |
505 | next_pc += sizeof(struct binary_op); | |
506 | PO; | |
507 | } | |
508 | OP(FILTER_OP_LE_STRING): | |
509 | { | |
510 | int res; | |
511 | ||
512 | res = (stack_strcmp(stack, top, "<=") <= 0); | |
513 | estack_pop(stack, top, ax, bx); | |
514 | estack_ax_v = res; | |
515 | next_pc += sizeof(struct binary_op); | |
516 | PO; | |
517 | } | |
518 | ||
02aca193 PP |
519 | OP(FILTER_OP_EQ_STAR_GLOB_STRING): |
520 | { | |
521 | int res; | |
522 | ||
523 | res = (stack_star_glob_match(stack, top, "==") == 0); | |
524 | estack_pop(stack, top, ax, bx); | |
525 | estack_ax_v = res; | |
526 | next_pc += sizeof(struct binary_op); | |
527 | PO; | |
528 | } | |
529 | OP(FILTER_OP_NE_STAR_GLOB_STRING): | |
530 | { | |
531 | int res; | |
532 | ||
533 | res = (stack_star_glob_match(stack, top, "!=") != 0); | |
534 | estack_pop(stack, top, ax, bx); | |
535 | estack_ax_v = res; | |
536 | next_pc += sizeof(struct binary_op); | |
537 | PO; | |
538 | } | |
539 | ||
07dfc1d0 MD |
540 | OP(FILTER_OP_EQ_S64): |
541 | { | |
542 | int res; | |
543 | ||
544 | res = (estack_bx_v == estack_ax_v); | |
545 | estack_pop(stack, top, ax, bx); | |
546 | estack_ax_v = res; | |
547 | next_pc += sizeof(struct binary_op); | |
548 | PO; | |
549 | } | |
550 | OP(FILTER_OP_NE_S64): | |
551 | { | |
552 | int res; | |
553 | ||
554 | res = (estack_bx_v != estack_ax_v); | |
555 | estack_pop(stack, top, ax, bx); | |
556 | estack_ax_v = res; | |
557 | next_pc += sizeof(struct binary_op); | |
558 | PO; | |
559 | } | |
560 | OP(FILTER_OP_GT_S64): | |
561 | { | |
562 | int res; | |
563 | ||
564 | res = (estack_bx_v > estack_ax_v); | |
565 | estack_pop(stack, top, ax, bx); | |
566 | estack_ax_v = res; | |
567 | next_pc += sizeof(struct binary_op); | |
568 | PO; | |
569 | } | |
570 | OP(FILTER_OP_LT_S64): | |
571 | { | |
572 | int res; | |
573 | ||
574 | res = (estack_bx_v < estack_ax_v); | |
575 | estack_pop(stack, top, ax, bx); | |
576 | estack_ax_v = res; | |
577 | next_pc += sizeof(struct binary_op); | |
578 | PO; | |
579 | } | |
580 | OP(FILTER_OP_GE_S64): | |
581 | { | |
582 | int res; | |
583 | ||
584 | res = (estack_bx_v >= estack_ax_v); | |
585 | estack_pop(stack, top, ax, bx); | |
586 | estack_ax_v = res; | |
587 | next_pc += sizeof(struct binary_op); | |
588 | PO; | |
589 | } | |
590 | OP(FILTER_OP_LE_S64): | |
591 | { | |
592 | int res; | |
593 | ||
594 | res = (estack_bx_v <= estack_ax_v); | |
595 | estack_pop(stack, top, ax, bx); | |
596 | estack_ax_v = res; | |
597 | next_pc += sizeof(struct binary_op); | |
598 | PO; | |
599 | } | |
600 | ||
601 | OP(FILTER_OP_EQ_DOUBLE): | |
602 | OP(FILTER_OP_NE_DOUBLE): | |
603 | OP(FILTER_OP_GT_DOUBLE): | |
604 | OP(FILTER_OP_LT_DOUBLE): | |
605 | OP(FILTER_OP_GE_DOUBLE): | |
606 | OP(FILTER_OP_LE_DOUBLE): | |
607 | { | |
608 | BUG_ON(1); | |
609 | PO; | |
610 | } | |
611 | ||
612 | /* Mixed S64-double binary comparators */ | |
613 | OP(FILTER_OP_EQ_DOUBLE_S64): | |
614 | OP(FILTER_OP_NE_DOUBLE_S64): | |
615 | OP(FILTER_OP_GT_DOUBLE_S64): | |
616 | OP(FILTER_OP_LT_DOUBLE_S64): | |
617 | OP(FILTER_OP_GE_DOUBLE_S64): | |
618 | OP(FILTER_OP_LE_DOUBLE_S64): | |
619 | OP(FILTER_OP_EQ_S64_DOUBLE): | |
620 | OP(FILTER_OP_NE_S64_DOUBLE): | |
621 | OP(FILTER_OP_GT_S64_DOUBLE): | |
622 | OP(FILTER_OP_LT_S64_DOUBLE): | |
623 | OP(FILTER_OP_GE_S64_DOUBLE): | |
624 | OP(FILTER_OP_LE_S64_DOUBLE): | |
625 | { | |
626 | BUG_ON(1); | |
627 | PO; | |
628 | } | |
629 | ||
630 | /* unary */ | |
631 | OP(FILTER_OP_UNARY_PLUS): | |
632 | OP(FILTER_OP_UNARY_MINUS): | |
633 | OP(FILTER_OP_UNARY_NOT): | |
634 | printk(KERN_WARNING "unsupported non-specialized bytecode op %u\n", | |
635 | (unsigned int) *(filter_opcode_t *) pc); | |
636 | ret = -EINVAL; | |
637 | goto end; | |
638 | ||
639 | ||
640 | OP(FILTER_OP_UNARY_PLUS_S64): | |
641 | { | |
642 | next_pc += sizeof(struct unary_op); | |
643 | PO; | |
644 | } | |
645 | OP(FILTER_OP_UNARY_MINUS_S64): | |
646 | { | |
647 | estack_ax_v = -estack_ax_v; | |
648 | next_pc += sizeof(struct unary_op); | |
649 | PO; | |
650 | } | |
651 | OP(FILTER_OP_UNARY_PLUS_DOUBLE): | |
652 | OP(FILTER_OP_UNARY_MINUS_DOUBLE): | |
653 | { | |
654 | BUG_ON(1); | |
655 | PO; | |
656 | } | |
657 | OP(FILTER_OP_UNARY_NOT_S64): | |
658 | { | |
659 | estack_ax_v = !estack_ax_v; | |
660 | next_pc += sizeof(struct unary_op); | |
661 | PO; | |
662 | } | |
663 | OP(FILTER_OP_UNARY_NOT_DOUBLE): | |
664 | { | |
665 | BUG_ON(1); | |
666 | PO; | |
667 | } | |
668 | ||
669 | /* logical */ | |
670 | OP(FILTER_OP_AND): | |
671 | { | |
672 | struct logical_op *insn = (struct logical_op *) pc; | |
673 | ||
674 | /* If AX is 0, skip and evaluate to 0 */ | |
675 | if (unlikely(estack_ax_v == 0)) { | |
676 | dbg_printk("Jumping to bytecode offset %u\n", | |
677 | (unsigned int) insn->skip_offset); | |
678 | next_pc = start_pc + insn->skip_offset; | |
679 | } else { | |
680 | /* Pop 1 when jump not taken */ | |
681 | estack_pop(stack, top, ax, bx); | |
682 | next_pc += sizeof(struct logical_op); | |
683 | } | |
684 | PO; | |
685 | } | |
686 | OP(FILTER_OP_OR): | |
687 | { | |
688 | struct logical_op *insn = (struct logical_op *) pc; | |
689 | ||
690 | /* If AX is nonzero, skip and evaluate to 1 */ | |
691 | ||
692 | if (unlikely(estack_ax_v != 0)) { | |
693 | estack_ax_v = 1; | |
694 | dbg_printk("Jumping to bytecode offset %u\n", | |
695 | (unsigned int) insn->skip_offset); | |
696 | next_pc = start_pc + insn->skip_offset; | |
697 | } else { | |
698 | /* Pop 1 when jump not taken */ | |
699 | estack_pop(stack, top, ax, bx); | |
700 | next_pc += sizeof(struct logical_op); | |
701 | } | |
702 | PO; | |
703 | } | |
704 | ||
705 | ||
706 | /* load field ref */ | |
707 | OP(FILTER_OP_LOAD_FIELD_REF_STRING): | |
708 | { | |
709 | struct load_op *insn = (struct load_op *) pc; | |
710 | struct field_ref *ref = (struct field_ref *) insn->data; | |
711 | ||
712 | dbg_printk("load field ref offset %u type string\n", | |
713 | ref->offset); | |
714 | estack_push(stack, top, ax, bx); | |
715 | estack_ax(stack, top)->u.s.str = | |
716 | *(const char * const *) &filter_stack_data[ref->offset]; | |
717 | if (unlikely(!estack_ax(stack, top)->u.s.str)) { | |
718 | dbg_printk("Filter warning: loading a NULL string.\n"); | |
719 | ret = -EINVAL; | |
720 | goto end; | |
721 | } | |
cbc19040 | 722 | estack_ax(stack, top)->u.s.seq_len = LTTNG_SIZE_MAX; |
02aca193 PP |
723 | estack_ax(stack, top)->u.s.literal_type = |
724 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
f127e61e | 725 | estack_ax(stack, top)->u.s.user = 0; |
07dfc1d0 MD |
726 | dbg_printk("ref load string %s\n", estack_ax(stack, top)->u.s.str); |
727 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
728 | PO; | |
729 | } | |
730 | ||
731 | OP(FILTER_OP_LOAD_FIELD_REF_SEQUENCE): | |
732 | { | |
733 | struct load_op *insn = (struct load_op *) pc; | |
734 | struct field_ref *ref = (struct field_ref *) insn->data; | |
735 | ||
736 | dbg_printk("load field ref offset %u type sequence\n", | |
737 | ref->offset); | |
738 | estack_push(stack, top, ax, bx); | |
739 | estack_ax(stack, top)->u.s.seq_len = | |
740 | *(unsigned long *) &filter_stack_data[ref->offset]; | |
741 | estack_ax(stack, top)->u.s.str = | |
742 | *(const char **) (&filter_stack_data[ref->offset | |
743 | + sizeof(unsigned long)]); | |
744 | if (unlikely(!estack_ax(stack, top)->u.s.str)) { | |
745 | dbg_printk("Filter warning: loading a NULL sequence.\n"); | |
746 | ret = -EINVAL; | |
747 | goto end; | |
748 | } | |
02aca193 PP |
749 | estack_ax(stack, top)->u.s.literal_type = |
750 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
f127e61e | 751 | estack_ax(stack, top)->u.s.user = 0; |
07dfc1d0 MD |
752 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); |
753 | PO; | |
754 | } | |
755 | ||
756 | OP(FILTER_OP_LOAD_FIELD_REF_S64): | |
757 | { | |
758 | struct load_op *insn = (struct load_op *) pc; | |
759 | struct field_ref *ref = (struct field_ref *) insn->data; | |
760 | ||
761 | dbg_printk("load field ref offset %u type s64\n", | |
762 | ref->offset); | |
763 | estack_push(stack, top, ax, bx); | |
764 | estack_ax_v = | |
765 | ((struct literal_numeric *) &filter_stack_data[ref->offset])->v; | |
766 | dbg_printk("ref load s64 %lld\n", | |
767 | (long long) estack_ax_v); | |
768 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
769 | PO; | |
770 | } | |
771 | ||
772 | OP(FILTER_OP_LOAD_FIELD_REF_DOUBLE): | |
773 | { | |
774 | BUG_ON(1); | |
775 | PO; | |
776 | } | |
777 | ||
778 | /* load from immediate operand */ | |
779 | OP(FILTER_OP_LOAD_STRING): | |
780 | { | |
781 | struct load_op *insn = (struct load_op *) pc; | |
782 | ||
783 | dbg_printk("load string %s\n", insn->data); | |
784 | estack_push(stack, top, ax, bx); | |
785 | estack_ax(stack, top)->u.s.str = insn->data; | |
cbc19040 | 786 | estack_ax(stack, top)->u.s.seq_len = LTTNG_SIZE_MAX; |
02aca193 PP |
787 | estack_ax(stack, top)->u.s.literal_type = |
788 | ESTACK_STRING_LITERAL_TYPE_PLAIN; | |
789 | estack_ax(stack, top)->u.s.user = 0; | |
790 | next_pc += sizeof(struct load_op) + strlen(insn->data) + 1; | |
791 | PO; | |
792 | } | |
793 | ||
794 | OP(FILTER_OP_LOAD_STAR_GLOB_STRING): | |
795 | { | |
796 | struct load_op *insn = (struct load_op *) pc; | |
797 | ||
798 | dbg_printk("load globbing pattern %s\n", insn->data); | |
799 | estack_push(stack, top, ax, bx); | |
800 | estack_ax(stack, top)->u.s.str = insn->data; | |
cbc19040 | 801 | estack_ax(stack, top)->u.s.seq_len = LTTNG_SIZE_MAX; |
02aca193 PP |
802 | estack_ax(stack, top)->u.s.literal_type = |
803 | ESTACK_STRING_LITERAL_TYPE_STAR_GLOB; | |
f127e61e | 804 | estack_ax(stack, top)->u.s.user = 0; |
07dfc1d0 MD |
805 | next_pc += sizeof(struct load_op) + strlen(insn->data) + 1; |
806 | PO; | |
807 | } | |
808 | ||
809 | OP(FILTER_OP_LOAD_S64): | |
810 | { | |
811 | struct load_op *insn = (struct load_op *) pc; | |
812 | ||
813 | estack_push(stack, top, ax, bx); | |
814 | estack_ax_v = ((struct literal_numeric *) insn->data)->v; | |
815 | dbg_printk("load s64 %lld\n", | |
816 | (long long) estack_ax_v); | |
817 | next_pc += sizeof(struct load_op) | |
818 | + sizeof(struct literal_numeric); | |
819 | PO; | |
820 | } | |
821 | ||
822 | OP(FILTER_OP_LOAD_DOUBLE): | |
823 | { | |
824 | BUG_ON(1); | |
825 | PO; | |
826 | } | |
827 | ||
828 | /* cast */ | |
829 | OP(FILTER_OP_CAST_TO_S64): | |
830 | printk(KERN_WARNING "unsupported non-specialized bytecode op %u\n", | |
831 | (unsigned int) *(filter_opcode_t *) pc); | |
832 | ret = -EINVAL; | |
833 | goto end; | |
834 | ||
835 | OP(FILTER_OP_CAST_DOUBLE_TO_S64): | |
836 | { | |
837 | BUG_ON(1); | |
838 | PO; | |
839 | } | |
840 | ||
841 | OP(FILTER_OP_CAST_NOP): | |
842 | { | |
843 | next_pc += sizeof(struct cast_op); | |
844 | PO; | |
845 | } | |
846 | ||
847 | /* get context ref */ | |
848 | OP(FILTER_OP_GET_CONTEXT_REF_STRING): | |
849 | { | |
850 | struct load_op *insn = (struct load_op *) pc; | |
851 | struct field_ref *ref = (struct field_ref *) insn->data; | |
852 | struct lttng_ctx_field *ctx_field; | |
853 | union lttng_ctx_value v; | |
854 | ||
855 | dbg_printk("get context ref offset %u type string\n", | |
856 | ref->offset); | |
857 | ctx_field = <tng_static_ctx->fields[ref->offset]; | |
79150a49 | 858 | ctx_field->get_value(ctx_field, lttng_probe_ctx, &v); |
07dfc1d0 MD |
859 | estack_push(stack, top, ax, bx); |
860 | estack_ax(stack, top)->u.s.str = v.str; | |
861 | if (unlikely(!estack_ax(stack, top)->u.s.str)) { | |
862 | dbg_printk("Filter warning: loading a NULL string.\n"); | |
863 | ret = -EINVAL; | |
864 | goto end; | |
865 | } | |
cbc19040 | 866 | estack_ax(stack, top)->u.s.seq_len = LTTNG_SIZE_MAX; |
02aca193 PP |
867 | estack_ax(stack, top)->u.s.literal_type = |
868 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
f127e61e | 869 | estack_ax(stack, top)->u.s.user = 0; |
07dfc1d0 MD |
870 | dbg_printk("ref get context string %s\n", estack_ax(stack, top)->u.s.str); |
871 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
872 | PO; | |
873 | } | |
874 | ||
875 | OP(FILTER_OP_GET_CONTEXT_REF_S64): | |
876 | { | |
877 | struct load_op *insn = (struct load_op *) pc; | |
878 | struct field_ref *ref = (struct field_ref *) insn->data; | |
879 | struct lttng_ctx_field *ctx_field; | |
880 | union lttng_ctx_value v; | |
881 | ||
882 | dbg_printk("get context ref offset %u type s64\n", | |
883 | ref->offset); | |
884 | ctx_field = <tng_static_ctx->fields[ref->offset]; | |
79150a49 | 885 | ctx_field->get_value(ctx_field, lttng_probe_ctx, &v); |
07dfc1d0 MD |
886 | estack_push(stack, top, ax, bx); |
887 | estack_ax_v = v.s64; | |
888 | dbg_printk("ref get context s64 %lld\n", | |
889 | (long long) estack_ax_v); | |
890 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
891 | PO; | |
892 | } | |
893 | ||
894 | OP(FILTER_OP_GET_CONTEXT_REF_DOUBLE): | |
895 | { | |
896 | BUG_ON(1); | |
897 | PO; | |
898 | } | |
899 | ||
f127e61e MD |
900 | /* load userspace field ref */ |
901 | OP(FILTER_OP_LOAD_FIELD_REF_USER_STRING): | |
902 | { | |
903 | struct load_op *insn = (struct load_op *) pc; | |
904 | struct field_ref *ref = (struct field_ref *) insn->data; | |
905 | ||
906 | dbg_printk("load field ref offset %u type user string\n", | |
907 | ref->offset); | |
908 | estack_push(stack, top, ax, bx); | |
5b4ad89f | 909 | estack_ax(stack, top)->u.s.user_str = |
f127e61e MD |
910 | *(const char * const *) &filter_stack_data[ref->offset]; |
911 | if (unlikely(!estack_ax(stack, top)->u.s.str)) { | |
912 | dbg_printk("Filter warning: loading a NULL string.\n"); | |
913 | ret = -EINVAL; | |
914 | goto end; | |
915 | } | |
cbc19040 | 916 | estack_ax(stack, top)->u.s.seq_len = LTTNG_SIZE_MAX; |
02aca193 PP |
917 | estack_ax(stack, top)->u.s.literal_type = |
918 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
f127e61e MD |
919 | estack_ax(stack, top)->u.s.user = 1; |
920 | dbg_printk("ref load string %s\n", estack_ax(stack, top)->u.s.str); | |
921 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
922 | PO; | |
923 | } | |
924 | ||
925 | OP(FILTER_OP_LOAD_FIELD_REF_USER_SEQUENCE): | |
926 | { | |
927 | struct load_op *insn = (struct load_op *) pc; | |
928 | struct field_ref *ref = (struct field_ref *) insn->data; | |
929 | ||
930 | dbg_printk("load field ref offset %u type user sequence\n", | |
931 | ref->offset); | |
932 | estack_push(stack, top, ax, bx); | |
933 | estack_ax(stack, top)->u.s.seq_len = | |
934 | *(unsigned long *) &filter_stack_data[ref->offset]; | |
5b4ad89f | 935 | estack_ax(stack, top)->u.s.user_str = |
f127e61e MD |
936 | *(const char **) (&filter_stack_data[ref->offset |
937 | + sizeof(unsigned long)]); | |
938 | if (unlikely(!estack_ax(stack, top)->u.s.str)) { | |
939 | dbg_printk("Filter warning: loading a NULL sequence.\n"); | |
940 | ret = -EINVAL; | |
941 | goto end; | |
942 | } | |
02aca193 PP |
943 | estack_ax(stack, top)->u.s.literal_type = |
944 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
f127e61e MD |
945 | estack_ax(stack, top)->u.s.user = 1; |
946 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
947 | PO; | |
948 | } | |
949 | ||
07dfc1d0 MD |
950 | END_OP |
951 | end: | |
952 | /* return 0 (discard) on error */ | |
953 | if (ret) | |
954 | return 0; | |
955 | return retval; | |
956 | } | |
957 | ||
958 | #undef START_OP | |
959 | #undef OP | |
960 | #undef PO | |
961 | #undef END_OP |