Commit | Line | Data |
---|---|---|
9f36eaed MJ |
1 | /* SPDX-License-Identifier: MIT |
2 | * | |
07dfc1d0 MD |
3 | * lttng-filter-interpreter.c |
4 | * | |
5 | * LTTng modules filter interpreter. | |
6 | * | |
bbf3aef5 | 7 | * Copyright (C) 2010-2016 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
07dfc1d0 MD |
8 | */ |
9 | ||
f127e61e | 10 | #include <linux/uaccess.h> |
63155590 | 11 | #include <wrapper/frame.h> |
cbc19040 | 12 | #include <wrapper/types.h> |
3834b99f | 13 | #include <linux/swab.h> |
f127e61e | 14 | |
241ae9a8 | 15 | #include <lttng-filter.h> |
02aca193 | 16 | #include <lttng-string-utils.h> |
07dfc1d0 | 17 | |
63155590 MD |
18 | LTTNG_STACK_FRAME_NON_STANDARD(lttng_filter_interpret_bytecode); |
19 | ||
f127e61e MD |
20 | /* |
21 | * get_char should be called with page fault handler disabled if it is expected | |
22 | * to handle user-space read. | |
23 | */ | |
24 | static | |
25 | char get_char(struct estack_entry *reg, size_t offset) | |
26 | { | |
27 | if (unlikely(offset >= reg->u.s.seq_len)) | |
28 | return '\0'; | |
29 | if (reg->u.s.user) { | |
30 | char c; | |
31 | ||
32 | /* Handle invalid access as end of string. */ | |
33 | if (unlikely(!access_ok(VERIFY_READ, | |
34 | reg->u.s.user_str + offset, | |
35 | sizeof(c)))) | |
36 | return '\0'; | |
37 | /* Handle fault (nonzero return value) as end of string. */ | |
38 | if (unlikely(__copy_from_user_inatomic(&c, | |
39 | reg->u.s.user_str + offset, | |
40 | sizeof(c)))) | |
41 | return '\0'; | |
42 | return c; | |
43 | } else { | |
44 | return reg->u.s.str[offset]; | |
45 | } | |
46 | } | |
47 | ||
07dfc1d0 MD |
48 | /* |
49 | * -1: wildcard found. | |
50 | * -2: unknown escape char. | |
51 | * 0: normal char. | |
52 | */ | |
07dfc1d0 | 53 | static |
f127e61e | 54 | int parse_char(struct estack_entry *reg, char *c, size_t *offset) |
07dfc1d0 | 55 | { |
f127e61e | 56 | switch (*c) { |
07dfc1d0 | 57 | case '\\': |
f127e61e MD |
58 | (*offset)++; |
59 | *c = get_char(reg, *offset); | |
60 | switch (*c) { | |
07dfc1d0 MD |
61 | case '\\': |
62 | case '*': | |
63 | return 0; | |
64 | default: | |
65 | return -2; | |
66 | } | |
67 | case '*': | |
68 | return -1; | |
69 | default: | |
70 | return 0; | |
71 | } | |
72 | } | |
73 | ||
02aca193 PP |
74 | static |
75 | char get_char_at_cb(size_t at, void *data) | |
76 | { | |
77 | return get_char(data, at); | |
78 | } | |
79 | ||
80 | static | |
81 | int stack_star_glob_match(struct estack *stack, int top, const char *cmp_type) | |
82 | { | |
83 | bool has_user = false; | |
84 | mm_segment_t old_fs; | |
85 | int result; | |
86 | struct estack_entry *pattern_reg; | |
87 | struct estack_entry *candidate_reg; | |
88 | ||
89 | if (estack_bx(stack, top)->u.s.user | |
90 | || estack_ax(stack, top)->u.s.user) { | |
91 | has_user = true; | |
92 | old_fs = get_fs(); | |
93 | set_fs(KERNEL_DS); | |
94 | pagefault_disable(); | |
95 | } | |
96 | ||
97 | /* Find out which side is the pattern vs. the candidate. */ | |
98 | if (estack_ax(stack, top)->u.s.literal_type == ESTACK_STRING_LITERAL_TYPE_STAR_GLOB) { | |
99 | pattern_reg = estack_ax(stack, top); | |
100 | candidate_reg = estack_bx(stack, top); | |
101 | } else { | |
102 | pattern_reg = estack_bx(stack, top); | |
103 | candidate_reg = estack_ax(stack, top); | |
104 | } | |
105 | ||
106 | /* Perform the match operation. */ | |
107 | result = !strutils_star_glob_match_char_cb(get_char_at_cb, | |
108 | pattern_reg, get_char_at_cb, candidate_reg); | |
109 | if (has_user) { | |
110 | pagefault_enable(); | |
111 | set_fs(old_fs); | |
112 | } | |
113 | ||
114 | return result; | |
115 | } | |
116 | ||
07dfc1d0 MD |
117 | static |
118 | int stack_strcmp(struct estack *stack, int top, const char *cmp_type) | |
119 | { | |
f127e61e MD |
120 | size_t offset_bx = 0, offset_ax = 0; |
121 | int diff, has_user = 0; | |
122 | mm_segment_t old_fs; | |
123 | ||
124 | if (estack_bx(stack, top)->u.s.user | |
125 | || estack_ax(stack, top)->u.s.user) { | |
126 | has_user = 1; | |
127 | old_fs = get_fs(); | |
128 | set_fs(KERNEL_DS); | |
129 | pagefault_disable(); | |
130 | } | |
07dfc1d0 MD |
131 | |
132 | for (;;) { | |
f127e61e | 133 | int ret; |
07dfc1d0 | 134 | int escaped_r0 = 0; |
f127e61e | 135 | char char_bx, char_ax; |
07dfc1d0 | 136 | |
f127e61e MD |
137 | char_bx = get_char(estack_bx(stack, top), offset_bx); |
138 | char_ax = get_char(estack_ax(stack, top), offset_ax); | |
139 | ||
140 | if (unlikely(char_bx == '\0')) { | |
141 | if (char_ax == '\0') { | |
142 | diff = 0; | |
143 | break; | |
07dfc1d0 | 144 | } else { |
02aca193 PP |
145 | if (estack_ax(stack, top)->u.s.literal_type == |
146 | ESTACK_STRING_LITERAL_TYPE_PLAIN) { | |
f127e61e MD |
147 | ret = parse_char(estack_ax(stack, top), |
148 | &char_ax, &offset_ax); | |
149 | if (ret == -1) { | |
150 | diff = 0; | |
151 | break; | |
152 | } | |
07dfc1d0 | 153 | } |
f127e61e MD |
154 | diff = -1; |
155 | break; | |
07dfc1d0 MD |
156 | } |
157 | } | |
f127e61e | 158 | if (unlikely(char_ax == '\0')) { |
02aca193 PP |
159 | if (estack_bx(stack, top)->u.s.literal_type == |
160 | ESTACK_STRING_LITERAL_TYPE_PLAIN) { | |
abfd272b MD |
161 | ret = parse_char(estack_bx(stack, top), |
162 | &char_bx, &offset_bx); | |
163 | if (ret == -1) { | |
164 | diff = 0; | |
165 | break; | |
07dfc1d0 | 166 | } |
07dfc1d0 | 167 | } |
abfd272b MD |
168 | diff = 1; |
169 | break; | |
07dfc1d0 | 170 | } |
02aca193 PP |
171 | if (estack_bx(stack, top)->u.s.literal_type == |
172 | ESTACK_STRING_LITERAL_TYPE_PLAIN) { | |
f127e61e MD |
173 | ret = parse_char(estack_bx(stack, top), |
174 | &char_bx, &offset_bx); | |
07dfc1d0 | 175 | if (ret == -1) { |
f127e61e MD |
176 | diff = 0; |
177 | break; | |
07dfc1d0 MD |
178 | } else if (ret == -2) { |
179 | escaped_r0 = 1; | |
180 | } | |
181 | /* else compare both char */ | |
182 | } | |
02aca193 PP |
183 | if (estack_ax(stack, top)->u.s.literal_type == |
184 | ESTACK_STRING_LITERAL_TYPE_PLAIN) { | |
f127e61e MD |
185 | ret = parse_char(estack_ax(stack, top), |
186 | &char_ax, &offset_ax); | |
07dfc1d0 | 187 | if (ret == -1) { |
f127e61e MD |
188 | diff = 0; |
189 | break; | |
07dfc1d0 | 190 | } else if (ret == -2) { |
f127e61e MD |
191 | if (!escaped_r0) { |
192 | diff = -1; | |
193 | break; | |
194 | } | |
07dfc1d0 | 195 | } else { |
f127e61e MD |
196 | if (escaped_r0) { |
197 | diff = 1; | |
198 | break; | |
199 | } | |
07dfc1d0 MD |
200 | } |
201 | } else { | |
f127e61e MD |
202 | if (escaped_r0) { |
203 | diff = 1; | |
204 | break; | |
205 | } | |
07dfc1d0 | 206 | } |
f127e61e | 207 | diff = char_bx - char_ax; |
07dfc1d0 MD |
208 | if (diff != 0) |
209 | break; | |
f127e61e MD |
210 | offset_bx++; |
211 | offset_ax++; | |
212 | } | |
213 | if (has_user) { | |
214 | pagefault_enable(); | |
215 | set_fs(old_fs); | |
07dfc1d0 MD |
216 | } |
217 | return diff; | |
218 | } | |
219 | ||
220 | uint64_t lttng_filter_false(void *filter_data, | |
79150a49 | 221 | struct lttng_probe_ctx *lttng_probe_ctx, |
07dfc1d0 MD |
222 | const char *filter_stack_data) |
223 | { | |
224 | return 0; | |
225 | } | |
226 | ||
227 | #ifdef INTERPRETER_USE_SWITCH | |
228 | ||
229 | /* | |
230 | * Fallback for compilers that do not support taking address of labels. | |
231 | */ | |
232 | ||
233 | #define START_OP \ | |
234 | start_pc = &bytecode->data[0]; \ | |
235 | for (pc = next_pc = start_pc; pc - start_pc < bytecode->len; \ | |
236 | pc = next_pc) { \ | |
237 | dbg_printk("Executing op %s (%u)\n", \ | |
238 | lttng_filter_print_op((unsigned int) *(filter_opcode_t *) pc), \ | |
239 | (unsigned int) *(filter_opcode_t *) pc); \ | |
240 | switch (*(filter_opcode_t *) pc) { | |
241 | ||
242 | #define OP(name) case name | |
243 | ||
244 | #define PO break | |
245 | ||
246 | #define END_OP } \ | |
247 | } | |
248 | ||
249 | #else | |
250 | ||
251 | /* | |
252 | * Dispatch-table based interpreter. | |
253 | */ | |
254 | ||
255 | #define START_OP \ | |
3834b99f | 256 | start_pc = &bytecode->code[0]; \ |
07dfc1d0 MD |
257 | pc = next_pc = start_pc; \ |
258 | if (unlikely(pc - start_pc >= bytecode->len)) \ | |
259 | goto end; \ | |
260 | goto *dispatch[*(filter_opcode_t *) pc]; | |
261 | ||
262 | #define OP(name) \ | |
263 | LABEL_##name | |
264 | ||
265 | #define PO \ | |
266 | pc = next_pc; \ | |
267 | goto *dispatch[*(filter_opcode_t *) pc]; | |
268 | ||
269 | #define END_OP | |
270 | ||
271 | #endif | |
272 | ||
3834b99f MD |
273 | static int context_get_index(struct lttng_probe_ctx *lttng_probe_ctx, |
274 | struct load_ptr *ptr, | |
275 | uint32_t idx) | |
276 | { | |
277 | ||
278 | struct lttng_ctx_field *ctx_field; | |
279 | struct lttng_event_field *field; | |
280 | union lttng_ctx_value v; | |
281 | ||
282 | ctx_field = <tng_static_ctx->fields[idx]; | |
283 | field = &ctx_field->event_field; | |
284 | ptr->type = LOAD_OBJECT; | |
285 | /* field is only used for types nested within variants. */ | |
286 | ptr->field = NULL; | |
287 | ||
288 | switch (field->type.atype) { | |
289 | case atype_integer: | |
290 | ctx_field->get_value(ctx_field, lttng_probe_ctx, &v); | |
291 | if (field->type.u.basic.integer.signedness) { | |
292 | ptr->object_type = OBJECT_TYPE_S64; | |
293 | ptr->u.s64 = v.s64; | |
294 | ptr->ptr = &ptr->u.s64; | |
295 | } else { | |
296 | ptr->object_type = OBJECT_TYPE_U64; | |
297 | ptr->u.u64 = v.s64; /* Cast. */ | |
298 | ptr->ptr = &ptr->u.u64; | |
299 | } | |
300 | break; | |
301 | case atype_enum: | |
302 | { | |
303 | const struct lttng_integer_type *itype = | |
304 | &field->type.u.basic.enumeration.container_type; | |
305 | ||
306 | ctx_field->get_value(ctx_field, lttng_probe_ctx, &v); | |
307 | if (itype->signedness) { | |
308 | ptr->object_type = OBJECT_TYPE_S64; | |
309 | ptr->u.s64 = v.s64; | |
310 | ptr->ptr = &ptr->u.s64; | |
311 | } else { | |
312 | ptr->object_type = OBJECT_TYPE_U64; | |
313 | ptr->u.u64 = v.s64; /* Cast. */ | |
314 | ptr->ptr = &ptr->u.u64; | |
315 | } | |
316 | break; | |
317 | } | |
318 | case atype_array: | |
319 | if (field->type.u.array.elem_type.atype != atype_integer) { | |
320 | printk(KERN_WARNING "Array nesting only supports integer types.\n"); | |
321 | return -EINVAL; | |
322 | } | |
323 | if (field->type.u.array.elem_type.u.basic.integer.encoding == lttng_encode_none) { | |
324 | printk(KERN_WARNING "Only string arrays are supported for contexts.\n"); | |
325 | return -EINVAL; | |
326 | } | |
327 | ptr->object_type = OBJECT_TYPE_STRING; | |
328 | ctx_field->get_value(ctx_field, lttng_probe_ctx, &v); | |
329 | ptr->ptr = v.str; | |
330 | break; | |
331 | case atype_sequence: | |
332 | if (field->type.u.sequence.elem_type.atype != atype_integer) { | |
333 | printk(KERN_WARNING "Sequence nesting only supports integer types.\n"); | |
334 | return -EINVAL; | |
335 | } | |
336 | if (field->type.u.sequence.elem_type.u.basic.integer.encoding == lttng_encode_none) { | |
337 | printk(KERN_WARNING "Only string sequences are supported for contexts.\n"); | |
338 | return -EINVAL; | |
339 | } | |
340 | ptr->object_type = OBJECT_TYPE_STRING; | |
341 | ctx_field->get_value(ctx_field, lttng_probe_ctx, &v); | |
342 | ptr->ptr = v.str; | |
343 | break; | |
344 | case atype_array_bitfield: | |
345 | printk(KERN_WARNING "Bitfield array type is not supported.\n"); | |
346 | return -EINVAL; | |
347 | case atype_sequence_bitfield: | |
348 | printk(KERN_WARNING "Bitfield sequence type is not supported.\n"); | |
349 | return -EINVAL; | |
350 | case atype_string: | |
351 | ptr->object_type = OBJECT_TYPE_STRING; | |
352 | ctx_field->get_value(ctx_field, lttng_probe_ctx, &v); | |
353 | ptr->ptr = v.str; | |
354 | break; | |
355 | case atype_struct: | |
356 | printk(KERN_WARNING "Structure type cannot be loaded.\n"); | |
357 | return -EINVAL; | |
358 | default: | |
359 | printk(KERN_WARNING "Unknown type: %d", (int) field->type.atype); | |
360 | return -EINVAL; | |
361 | } | |
362 | return 0; | |
363 | } | |
364 | ||
365 | static int dynamic_get_index(struct lttng_probe_ctx *lttng_probe_ctx, | |
366 | struct bytecode_runtime *runtime, | |
367 | uint64_t index, struct estack_entry *stack_top) | |
368 | { | |
369 | int ret; | |
370 | const struct filter_get_index_data *gid; | |
371 | ||
372 | /* | |
373 | * Types nested within variants need to perform dynamic lookup | |
374 | * based on the field descriptions. LTTng-UST does not implement | |
375 | * variants for now. | |
376 | */ | |
377 | if (stack_top->u.ptr.field) | |
378 | return -EINVAL; | |
379 | gid = (const struct filter_get_index_data *) &runtime->data[index]; | |
380 | switch (stack_top->u.ptr.type) { | |
381 | case LOAD_OBJECT: | |
382 | switch (stack_top->u.ptr.object_type) { | |
383 | case OBJECT_TYPE_ARRAY: | |
384 | { | |
385 | const char *ptr; | |
386 | ||
387 | WARN_ON_ONCE(gid->offset >= gid->array_len); | |
388 | /* Skip count (unsigned long) */ | |
389 | ptr = *(const char **) (stack_top->u.ptr.ptr + sizeof(unsigned long)); | |
390 | ptr = ptr + gid->offset; | |
391 | stack_top->u.ptr.ptr = ptr; | |
392 | stack_top->u.ptr.object_type = gid->elem.type; | |
393 | stack_top->u.ptr.rev_bo = gid->elem.rev_bo; | |
394 | /* field is only used for types nested within variants. */ | |
395 | stack_top->u.ptr.field = NULL; | |
396 | break; | |
397 | } | |
398 | case OBJECT_TYPE_SEQUENCE: | |
399 | { | |
400 | const char *ptr; | |
401 | size_t ptr_seq_len; | |
402 | ||
403 | ptr = *(const char **) (stack_top->u.ptr.ptr + sizeof(unsigned long)); | |
404 | ptr_seq_len = *(unsigned long *) stack_top->u.ptr.ptr; | |
405 | if (gid->offset >= gid->elem.len * ptr_seq_len) { | |
406 | ret = -EINVAL; | |
407 | goto end; | |
408 | } | |
409 | ptr = ptr + gid->offset; | |
410 | stack_top->u.ptr.ptr = ptr; | |
411 | stack_top->u.ptr.object_type = gid->elem.type; | |
412 | stack_top->u.ptr.rev_bo = gid->elem.rev_bo; | |
413 | /* field is only used for types nested within variants. */ | |
414 | stack_top->u.ptr.field = NULL; | |
415 | break; | |
416 | } | |
417 | case OBJECT_TYPE_STRUCT: | |
418 | printk(KERN_WARNING "Nested structures are not supported yet.\n"); | |
419 | ret = -EINVAL; | |
420 | goto end; | |
421 | case OBJECT_TYPE_VARIANT: | |
422 | default: | |
423 | printk(KERN_WARNING "Unexpected get index type %d", | |
424 | (int) stack_top->u.ptr.object_type); | |
425 | ret = -EINVAL; | |
426 | goto end; | |
427 | } | |
428 | break; | |
429 | case LOAD_ROOT_CONTEXT: | |
430 | case LOAD_ROOT_APP_CONTEXT: /* Fall-through */ | |
431 | { | |
432 | ret = context_get_index(lttng_probe_ctx, | |
433 | &stack_top->u.ptr, | |
434 | gid->ctx_index); | |
435 | if (ret) { | |
436 | goto end; | |
437 | } | |
438 | break; | |
439 | } | |
440 | case LOAD_ROOT_PAYLOAD: | |
441 | stack_top->u.ptr.ptr += gid->offset; | |
442 | if (gid->elem.type == OBJECT_TYPE_STRING) | |
443 | stack_top->u.ptr.ptr = *(const char * const *) stack_top->u.ptr.ptr; | |
444 | stack_top->u.ptr.object_type = gid->elem.type; | |
445 | stack_top->u.ptr.type = LOAD_OBJECT; | |
446 | /* field is only used for types nested within variants. */ | |
447 | stack_top->u.ptr.field = NULL; | |
448 | break; | |
449 | } | |
450 | return 0; | |
451 | ||
452 | end: | |
453 | return ret; | |
454 | } | |
455 | ||
456 | static int dynamic_load_field(struct estack_entry *stack_top) | |
457 | { | |
458 | int ret; | |
459 | ||
460 | switch (stack_top->u.ptr.type) { | |
461 | case LOAD_OBJECT: | |
462 | break; | |
463 | case LOAD_ROOT_CONTEXT: | |
464 | case LOAD_ROOT_APP_CONTEXT: | |
465 | case LOAD_ROOT_PAYLOAD: | |
466 | default: | |
467 | dbg_printk("Filter warning: cannot load root, missing field name.\n"); | |
468 | ret = -EINVAL; | |
469 | goto end; | |
470 | } | |
471 | switch (stack_top->u.ptr.object_type) { | |
472 | case OBJECT_TYPE_S8: | |
473 | dbg_printk("op load field s8\n"); | |
474 | stack_top->u.v = *(int8_t *) stack_top->u.ptr.ptr; | |
475 | break; | |
476 | case OBJECT_TYPE_S16: | |
477 | { | |
478 | int16_t tmp; | |
479 | ||
480 | dbg_printk("op load field s16\n"); | |
481 | tmp = *(int16_t *) stack_top->u.ptr.ptr; | |
482 | if (stack_top->u.ptr.rev_bo) | |
483 | __swab16s(&tmp); | |
484 | stack_top->u.v = tmp; | |
485 | break; | |
486 | } | |
487 | case OBJECT_TYPE_S32: | |
488 | { | |
489 | int32_t tmp; | |
490 | ||
491 | dbg_printk("op load field s32\n"); | |
492 | tmp = *(int32_t *) stack_top->u.ptr.ptr; | |
493 | if (stack_top->u.ptr.rev_bo) | |
494 | __swab32s(&tmp); | |
495 | stack_top->u.v = tmp; | |
496 | break; | |
497 | } | |
498 | case OBJECT_TYPE_S64: | |
499 | { | |
500 | int64_t tmp; | |
501 | ||
502 | dbg_printk("op load field s64\n"); | |
503 | tmp = *(int64_t *) stack_top->u.ptr.ptr; | |
504 | if (stack_top->u.ptr.rev_bo) | |
505 | __swab64s(&tmp); | |
506 | stack_top->u.v = tmp; | |
507 | break; | |
508 | } | |
509 | case OBJECT_TYPE_U8: | |
510 | dbg_printk("op load field u8\n"); | |
511 | stack_top->u.v = *(uint8_t *) stack_top->u.ptr.ptr; | |
512 | break; | |
513 | case OBJECT_TYPE_U16: | |
514 | { | |
515 | uint16_t tmp; | |
516 | ||
517 | dbg_printk("op load field s16\n"); | |
518 | tmp = *(uint16_t *) stack_top->u.ptr.ptr; | |
519 | if (stack_top->u.ptr.rev_bo) | |
520 | __swab16s(&tmp); | |
521 | stack_top->u.v = tmp; | |
522 | break; | |
523 | } | |
524 | case OBJECT_TYPE_U32: | |
525 | { | |
526 | uint32_t tmp; | |
527 | ||
528 | dbg_printk("op load field u32\n"); | |
529 | tmp = *(uint32_t *) stack_top->u.ptr.ptr; | |
530 | if (stack_top->u.ptr.rev_bo) | |
531 | __swab32s(&tmp); | |
532 | stack_top->u.v = tmp; | |
533 | break; | |
534 | } | |
535 | case OBJECT_TYPE_U64: | |
536 | { | |
537 | uint64_t tmp; | |
538 | ||
539 | dbg_printk("op load field u64\n"); | |
540 | tmp = *(uint64_t *) stack_top->u.ptr.ptr; | |
541 | if (stack_top->u.ptr.rev_bo) | |
542 | __swab64s(&tmp); | |
543 | stack_top->u.v = tmp; | |
544 | break; | |
545 | } | |
546 | case OBJECT_TYPE_STRING: | |
547 | { | |
548 | const char *str; | |
549 | ||
550 | dbg_printk("op load field string\n"); | |
551 | str = (const char *) stack_top->u.ptr.ptr; | |
552 | stack_top->u.s.str = str; | |
553 | if (unlikely(!stack_top->u.s.str)) { | |
554 | dbg_printk("Filter warning: loading a NULL string.\n"); | |
555 | ret = -EINVAL; | |
556 | goto end; | |
557 | } | |
4efe037b | 558 | stack_top->u.s.seq_len = LTTNG_SIZE_MAX; |
3834b99f MD |
559 | stack_top->u.s.literal_type = |
560 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
561 | break; | |
562 | } | |
563 | case OBJECT_TYPE_STRING_SEQUENCE: | |
564 | { | |
565 | const char *ptr; | |
566 | ||
567 | dbg_printk("op load field string sequence\n"); | |
568 | ptr = stack_top->u.ptr.ptr; | |
569 | stack_top->u.s.seq_len = *(unsigned long *) ptr; | |
570 | stack_top->u.s.str = *(const char **) (ptr + sizeof(unsigned long)); | |
571 | if (unlikely(!stack_top->u.s.str)) { | |
572 | dbg_printk("Filter warning: loading a NULL sequence.\n"); | |
573 | ret = -EINVAL; | |
574 | goto end; | |
575 | } | |
576 | stack_top->u.s.literal_type = | |
577 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
578 | break; | |
579 | } | |
580 | case OBJECT_TYPE_DYNAMIC: | |
581 | /* | |
582 | * Dynamic types in context are looked up | |
583 | * by context get index. | |
584 | */ | |
585 | ret = -EINVAL; | |
586 | goto end; | |
587 | case OBJECT_TYPE_DOUBLE: | |
588 | ret = -EINVAL; | |
589 | goto end; | |
590 | case OBJECT_TYPE_SEQUENCE: | |
591 | case OBJECT_TYPE_ARRAY: | |
592 | case OBJECT_TYPE_STRUCT: | |
593 | case OBJECT_TYPE_VARIANT: | |
594 | printk(KERN_WARNING "Sequences, arrays, struct and variant cannot be loaded (nested types).\n"); | |
595 | ret = -EINVAL; | |
596 | goto end; | |
597 | } | |
598 | return 0; | |
599 | ||
600 | end: | |
601 | return ret; | |
602 | } | |
603 | ||
07dfc1d0 MD |
604 | /* |
605 | * Return 0 (discard), or raise the 0x1 flag (log event). | |
606 | * Currently, other flags are kept for future extensions and have no | |
607 | * effect. | |
608 | */ | |
609 | uint64_t lttng_filter_interpret_bytecode(void *filter_data, | |
79150a49 | 610 | struct lttng_probe_ctx *lttng_probe_ctx, |
07dfc1d0 MD |
611 | const char *filter_stack_data) |
612 | { | |
613 | struct bytecode_runtime *bytecode = filter_data; | |
614 | void *pc, *next_pc, *start_pc; | |
615 | int ret = -EINVAL; | |
616 | uint64_t retval = 0; | |
617 | struct estack _stack; | |
618 | struct estack *stack = &_stack; | |
619 | register int64_t ax = 0, bx = 0; | |
620 | register int top = FILTER_STACK_EMPTY; | |
621 | #ifndef INTERPRETER_USE_SWITCH | |
622 | static void *dispatch[NR_FILTER_OPS] = { | |
623 | [ FILTER_OP_UNKNOWN ] = &&LABEL_FILTER_OP_UNKNOWN, | |
624 | ||
625 | [ FILTER_OP_RETURN ] = &&LABEL_FILTER_OP_RETURN, | |
626 | ||
627 | /* binary */ | |
628 | [ FILTER_OP_MUL ] = &&LABEL_FILTER_OP_MUL, | |
629 | [ FILTER_OP_DIV ] = &&LABEL_FILTER_OP_DIV, | |
630 | [ FILTER_OP_MOD ] = &&LABEL_FILTER_OP_MOD, | |
631 | [ FILTER_OP_PLUS ] = &&LABEL_FILTER_OP_PLUS, | |
632 | [ FILTER_OP_MINUS ] = &&LABEL_FILTER_OP_MINUS, | |
e16c054b MD |
633 | [ FILTER_OP_BIT_RSHIFT ] = &&LABEL_FILTER_OP_BIT_RSHIFT, |
634 | [ FILTER_OP_BIT_LSHIFT ] = &&LABEL_FILTER_OP_BIT_LSHIFT, | |
3834b99f MD |
635 | [ FILTER_OP_BIT_AND ] = &&LABEL_FILTER_OP_BIT_AND, |
636 | [ FILTER_OP_BIT_OR ] = &&LABEL_FILTER_OP_BIT_OR, | |
637 | [ FILTER_OP_BIT_XOR ] = &&LABEL_FILTER_OP_BIT_XOR, | |
07dfc1d0 MD |
638 | |
639 | /* binary comparators */ | |
640 | [ FILTER_OP_EQ ] = &&LABEL_FILTER_OP_EQ, | |
641 | [ FILTER_OP_NE ] = &&LABEL_FILTER_OP_NE, | |
642 | [ FILTER_OP_GT ] = &&LABEL_FILTER_OP_GT, | |
643 | [ FILTER_OP_LT ] = &&LABEL_FILTER_OP_LT, | |
644 | [ FILTER_OP_GE ] = &&LABEL_FILTER_OP_GE, | |
645 | [ FILTER_OP_LE ] = &&LABEL_FILTER_OP_LE, | |
646 | ||
647 | /* string binary comparator */ | |
648 | [ FILTER_OP_EQ_STRING ] = &&LABEL_FILTER_OP_EQ_STRING, | |
649 | [ FILTER_OP_NE_STRING ] = &&LABEL_FILTER_OP_NE_STRING, | |
650 | [ FILTER_OP_GT_STRING ] = &&LABEL_FILTER_OP_GT_STRING, | |
651 | [ FILTER_OP_LT_STRING ] = &&LABEL_FILTER_OP_LT_STRING, | |
652 | [ FILTER_OP_GE_STRING ] = &&LABEL_FILTER_OP_GE_STRING, | |
653 | [ FILTER_OP_LE_STRING ] = &&LABEL_FILTER_OP_LE_STRING, | |
654 | ||
02aca193 PP |
655 | /* globbing pattern binary comparator */ |
656 | [ FILTER_OP_EQ_STAR_GLOB_STRING ] = &&LABEL_FILTER_OP_EQ_STAR_GLOB_STRING, | |
657 | [ FILTER_OP_NE_STAR_GLOB_STRING ] = &&LABEL_FILTER_OP_NE_STAR_GLOB_STRING, | |
658 | ||
07dfc1d0 MD |
659 | /* s64 binary comparator */ |
660 | [ FILTER_OP_EQ_S64 ] = &&LABEL_FILTER_OP_EQ_S64, | |
661 | [ FILTER_OP_NE_S64 ] = &&LABEL_FILTER_OP_NE_S64, | |
662 | [ FILTER_OP_GT_S64 ] = &&LABEL_FILTER_OP_GT_S64, | |
663 | [ FILTER_OP_LT_S64 ] = &&LABEL_FILTER_OP_LT_S64, | |
664 | [ FILTER_OP_GE_S64 ] = &&LABEL_FILTER_OP_GE_S64, | |
665 | [ FILTER_OP_LE_S64 ] = &&LABEL_FILTER_OP_LE_S64, | |
666 | ||
667 | /* double binary comparator */ | |
668 | [ FILTER_OP_EQ_DOUBLE ] = &&LABEL_FILTER_OP_EQ_DOUBLE, | |
669 | [ FILTER_OP_NE_DOUBLE ] = &&LABEL_FILTER_OP_NE_DOUBLE, | |
670 | [ FILTER_OP_GT_DOUBLE ] = &&LABEL_FILTER_OP_GT_DOUBLE, | |
671 | [ FILTER_OP_LT_DOUBLE ] = &&LABEL_FILTER_OP_LT_DOUBLE, | |
672 | [ FILTER_OP_GE_DOUBLE ] = &&LABEL_FILTER_OP_GE_DOUBLE, | |
673 | [ FILTER_OP_LE_DOUBLE ] = &&LABEL_FILTER_OP_LE_DOUBLE, | |
674 | ||
675 | /* Mixed S64-double binary comparators */ | |
676 | [ FILTER_OP_EQ_DOUBLE_S64 ] = &&LABEL_FILTER_OP_EQ_DOUBLE_S64, | |
677 | [ FILTER_OP_NE_DOUBLE_S64 ] = &&LABEL_FILTER_OP_NE_DOUBLE_S64, | |
678 | [ FILTER_OP_GT_DOUBLE_S64 ] = &&LABEL_FILTER_OP_GT_DOUBLE_S64, | |
679 | [ FILTER_OP_LT_DOUBLE_S64 ] = &&LABEL_FILTER_OP_LT_DOUBLE_S64, | |
680 | [ FILTER_OP_GE_DOUBLE_S64 ] = &&LABEL_FILTER_OP_GE_DOUBLE_S64, | |
681 | [ FILTER_OP_LE_DOUBLE_S64 ] = &&LABEL_FILTER_OP_LE_DOUBLE_S64, | |
682 | ||
683 | [ FILTER_OP_EQ_S64_DOUBLE ] = &&LABEL_FILTER_OP_EQ_S64_DOUBLE, | |
684 | [ FILTER_OP_NE_S64_DOUBLE ] = &&LABEL_FILTER_OP_NE_S64_DOUBLE, | |
685 | [ FILTER_OP_GT_S64_DOUBLE ] = &&LABEL_FILTER_OP_GT_S64_DOUBLE, | |
686 | [ FILTER_OP_LT_S64_DOUBLE ] = &&LABEL_FILTER_OP_LT_S64_DOUBLE, | |
687 | [ FILTER_OP_GE_S64_DOUBLE ] = &&LABEL_FILTER_OP_GE_S64_DOUBLE, | |
688 | [ FILTER_OP_LE_S64_DOUBLE ] = &&LABEL_FILTER_OP_LE_S64_DOUBLE, | |
689 | ||
690 | /* unary */ | |
691 | [ FILTER_OP_UNARY_PLUS ] = &&LABEL_FILTER_OP_UNARY_PLUS, | |
692 | [ FILTER_OP_UNARY_MINUS ] = &&LABEL_FILTER_OP_UNARY_MINUS, | |
693 | [ FILTER_OP_UNARY_NOT ] = &&LABEL_FILTER_OP_UNARY_NOT, | |
694 | [ FILTER_OP_UNARY_PLUS_S64 ] = &&LABEL_FILTER_OP_UNARY_PLUS_S64, | |
695 | [ FILTER_OP_UNARY_MINUS_S64 ] = &&LABEL_FILTER_OP_UNARY_MINUS_S64, | |
696 | [ FILTER_OP_UNARY_NOT_S64 ] = &&LABEL_FILTER_OP_UNARY_NOT_S64, | |
697 | [ FILTER_OP_UNARY_PLUS_DOUBLE ] = &&LABEL_FILTER_OP_UNARY_PLUS_DOUBLE, | |
698 | [ FILTER_OP_UNARY_MINUS_DOUBLE ] = &&LABEL_FILTER_OP_UNARY_MINUS_DOUBLE, | |
699 | [ FILTER_OP_UNARY_NOT_DOUBLE ] = &&LABEL_FILTER_OP_UNARY_NOT_DOUBLE, | |
700 | ||
701 | /* logical */ | |
702 | [ FILTER_OP_AND ] = &&LABEL_FILTER_OP_AND, | |
703 | [ FILTER_OP_OR ] = &&LABEL_FILTER_OP_OR, | |
704 | ||
705 | /* load field ref */ | |
706 | [ FILTER_OP_LOAD_FIELD_REF ] = &&LABEL_FILTER_OP_LOAD_FIELD_REF, | |
707 | [ FILTER_OP_LOAD_FIELD_REF_STRING ] = &&LABEL_FILTER_OP_LOAD_FIELD_REF_STRING, | |
708 | [ FILTER_OP_LOAD_FIELD_REF_SEQUENCE ] = &&LABEL_FILTER_OP_LOAD_FIELD_REF_SEQUENCE, | |
709 | [ FILTER_OP_LOAD_FIELD_REF_S64 ] = &&LABEL_FILTER_OP_LOAD_FIELD_REF_S64, | |
710 | [ FILTER_OP_LOAD_FIELD_REF_DOUBLE ] = &&LABEL_FILTER_OP_LOAD_FIELD_REF_DOUBLE, | |
711 | ||
712 | /* load from immediate operand */ | |
713 | [ FILTER_OP_LOAD_STRING ] = &&LABEL_FILTER_OP_LOAD_STRING, | |
02aca193 | 714 | [ FILTER_OP_LOAD_STAR_GLOB_STRING ] = &&LABEL_FILTER_OP_LOAD_STAR_GLOB_STRING, |
07dfc1d0 MD |
715 | [ FILTER_OP_LOAD_S64 ] = &&LABEL_FILTER_OP_LOAD_S64, |
716 | [ FILTER_OP_LOAD_DOUBLE ] = &&LABEL_FILTER_OP_LOAD_DOUBLE, | |
717 | ||
718 | /* cast */ | |
719 | [ FILTER_OP_CAST_TO_S64 ] = &&LABEL_FILTER_OP_CAST_TO_S64, | |
720 | [ FILTER_OP_CAST_DOUBLE_TO_S64 ] = &&LABEL_FILTER_OP_CAST_DOUBLE_TO_S64, | |
721 | [ FILTER_OP_CAST_NOP ] = &&LABEL_FILTER_OP_CAST_NOP, | |
722 | ||
723 | /* get context ref */ | |
724 | [ FILTER_OP_GET_CONTEXT_REF ] = &&LABEL_FILTER_OP_GET_CONTEXT_REF, | |
725 | [ FILTER_OP_GET_CONTEXT_REF_STRING ] = &&LABEL_FILTER_OP_GET_CONTEXT_REF_STRING, | |
726 | [ FILTER_OP_GET_CONTEXT_REF_S64 ] = &&LABEL_FILTER_OP_GET_CONTEXT_REF_S64, | |
727 | [ FILTER_OP_GET_CONTEXT_REF_DOUBLE ] = &&LABEL_FILTER_OP_GET_CONTEXT_REF_DOUBLE, | |
f127e61e MD |
728 | |
729 | /* load userspace field ref */ | |
730 | [ FILTER_OP_LOAD_FIELD_REF_USER_STRING ] = &&LABEL_FILTER_OP_LOAD_FIELD_REF_USER_STRING, | |
731 | [ FILTER_OP_LOAD_FIELD_REF_USER_SEQUENCE ] = &&LABEL_FILTER_OP_LOAD_FIELD_REF_USER_SEQUENCE, | |
3834b99f MD |
732 | |
733 | /* Instructions for recursive traversal through composed types. */ | |
734 | [ FILTER_OP_GET_CONTEXT_ROOT ] = &&LABEL_FILTER_OP_GET_CONTEXT_ROOT, | |
735 | [ FILTER_OP_GET_APP_CONTEXT_ROOT ] = &&LABEL_FILTER_OP_GET_APP_CONTEXT_ROOT, | |
736 | [ FILTER_OP_GET_PAYLOAD_ROOT ] = &&LABEL_FILTER_OP_GET_PAYLOAD_ROOT, | |
737 | ||
738 | [ FILTER_OP_GET_SYMBOL ] = &&LABEL_FILTER_OP_GET_SYMBOL, | |
739 | [ FILTER_OP_GET_SYMBOL_FIELD ] = &&LABEL_FILTER_OP_GET_SYMBOL_FIELD, | |
740 | [ FILTER_OP_GET_INDEX_U16 ] = &&LABEL_FILTER_OP_GET_INDEX_U16, | |
741 | [ FILTER_OP_GET_INDEX_U64 ] = &&LABEL_FILTER_OP_GET_INDEX_U64, | |
742 | ||
743 | [ FILTER_OP_LOAD_FIELD ] = &&LABEL_FILTER_OP_LOAD_FIELD, | |
744 | [ FILTER_OP_LOAD_FIELD_S8 ] = &&LABEL_FILTER_OP_LOAD_FIELD_S8, | |
745 | [ FILTER_OP_LOAD_FIELD_S16 ] = &&LABEL_FILTER_OP_LOAD_FIELD_S16, | |
746 | [ FILTER_OP_LOAD_FIELD_S32 ] = &&LABEL_FILTER_OP_LOAD_FIELD_S32, | |
747 | [ FILTER_OP_LOAD_FIELD_S64 ] = &&LABEL_FILTER_OP_LOAD_FIELD_S64, | |
748 | [ FILTER_OP_LOAD_FIELD_U8 ] = &&LABEL_FILTER_OP_LOAD_FIELD_U8, | |
749 | [ FILTER_OP_LOAD_FIELD_U16 ] = &&LABEL_FILTER_OP_LOAD_FIELD_U16, | |
750 | [ FILTER_OP_LOAD_FIELD_U32 ] = &&LABEL_FILTER_OP_LOAD_FIELD_U32, | |
751 | [ FILTER_OP_LOAD_FIELD_U64 ] = &&LABEL_FILTER_OP_LOAD_FIELD_U64, | |
752 | [ FILTER_OP_LOAD_FIELD_STRING ] = &&LABEL_FILTER_OP_LOAD_FIELD_STRING, | |
753 | [ FILTER_OP_LOAD_FIELD_SEQUENCE ] = &&LABEL_FILTER_OP_LOAD_FIELD_SEQUENCE, | |
754 | [ FILTER_OP_LOAD_FIELD_DOUBLE ] = &&LABEL_FILTER_OP_LOAD_FIELD_DOUBLE, | |
e16c054b MD |
755 | |
756 | [ FILTER_OP_UNARY_BIT_NOT ] = &&LABEL_FILTER_OP_UNARY_BIT_NOT, | |
57ba4b41 MD |
757 | |
758 | [ FILTER_OP_RETURN_S64 ] = &&LABEL_FILTER_OP_RETURN_S64, | |
07dfc1d0 MD |
759 | }; |
760 | #endif /* #ifndef INTERPRETER_USE_SWITCH */ | |
761 | ||
762 | START_OP | |
763 | ||
764 | OP(FILTER_OP_UNKNOWN): | |
765 | OP(FILTER_OP_LOAD_FIELD_REF): | |
766 | OP(FILTER_OP_GET_CONTEXT_REF): | |
767 | #ifdef INTERPRETER_USE_SWITCH | |
768 | default: | |
769 | #endif /* INTERPRETER_USE_SWITCH */ | |
770 | printk(KERN_WARNING "unknown bytecode op %u\n", | |
771 | (unsigned int) *(filter_opcode_t *) pc); | |
772 | ret = -EINVAL; | |
773 | goto end; | |
774 | ||
775 | OP(FILTER_OP_RETURN): | |
57ba4b41 | 776 | OP(FILTER_OP_RETURN_S64): |
07dfc1d0 MD |
777 | /* LTTNG_FILTER_DISCARD or LTTNG_FILTER_RECORD_FLAG */ |
778 | retval = !!estack_ax_v; | |
779 | ret = 0; | |
780 | goto end; | |
781 | ||
782 | /* binary */ | |
783 | OP(FILTER_OP_MUL): | |
784 | OP(FILTER_OP_DIV): | |
785 | OP(FILTER_OP_MOD): | |
786 | OP(FILTER_OP_PLUS): | |
787 | OP(FILTER_OP_MINUS): | |
07dfc1d0 MD |
788 | printk(KERN_WARNING "unsupported bytecode op %u\n", |
789 | (unsigned int) *(filter_opcode_t *) pc); | |
790 | ret = -EINVAL; | |
791 | goto end; | |
792 | ||
793 | OP(FILTER_OP_EQ): | |
794 | OP(FILTER_OP_NE): | |
795 | OP(FILTER_OP_GT): | |
796 | OP(FILTER_OP_LT): | |
797 | OP(FILTER_OP_GE): | |
798 | OP(FILTER_OP_LE): | |
799 | printk(KERN_WARNING "unsupported non-specialized bytecode op %u\n", | |
800 | (unsigned int) *(filter_opcode_t *) pc); | |
801 | ret = -EINVAL; | |
802 | goto end; | |
803 | ||
804 | OP(FILTER_OP_EQ_STRING): | |
805 | { | |
806 | int res; | |
807 | ||
808 | res = (stack_strcmp(stack, top, "==") == 0); | |
809 | estack_pop(stack, top, ax, bx); | |
810 | estack_ax_v = res; | |
811 | next_pc += sizeof(struct binary_op); | |
812 | PO; | |
813 | } | |
814 | OP(FILTER_OP_NE_STRING): | |
815 | { | |
816 | int res; | |
817 | ||
818 | res = (stack_strcmp(stack, top, "!=") != 0); | |
819 | estack_pop(stack, top, ax, bx); | |
820 | estack_ax_v = res; | |
821 | next_pc += sizeof(struct binary_op); | |
822 | PO; | |
823 | } | |
824 | OP(FILTER_OP_GT_STRING): | |
825 | { | |
826 | int res; | |
827 | ||
828 | res = (stack_strcmp(stack, top, ">") > 0); | |
829 | estack_pop(stack, top, ax, bx); | |
830 | estack_ax_v = res; | |
831 | next_pc += sizeof(struct binary_op); | |
832 | PO; | |
833 | } | |
834 | OP(FILTER_OP_LT_STRING): | |
835 | { | |
836 | int res; | |
837 | ||
838 | res = (stack_strcmp(stack, top, "<") < 0); | |
839 | estack_pop(stack, top, ax, bx); | |
840 | estack_ax_v = res; | |
841 | next_pc += sizeof(struct binary_op); | |
842 | PO; | |
843 | } | |
844 | OP(FILTER_OP_GE_STRING): | |
845 | { | |
846 | int res; | |
847 | ||
848 | res = (stack_strcmp(stack, top, ">=") >= 0); | |
849 | estack_pop(stack, top, ax, bx); | |
850 | estack_ax_v = res; | |
851 | next_pc += sizeof(struct binary_op); | |
852 | PO; | |
853 | } | |
854 | OP(FILTER_OP_LE_STRING): | |
855 | { | |
856 | int res; | |
857 | ||
858 | res = (stack_strcmp(stack, top, "<=") <= 0); | |
859 | estack_pop(stack, top, ax, bx); | |
860 | estack_ax_v = res; | |
861 | next_pc += sizeof(struct binary_op); | |
862 | PO; | |
863 | } | |
864 | ||
02aca193 PP |
865 | OP(FILTER_OP_EQ_STAR_GLOB_STRING): |
866 | { | |
867 | int res; | |
868 | ||
869 | res = (stack_star_glob_match(stack, top, "==") == 0); | |
870 | estack_pop(stack, top, ax, bx); | |
871 | estack_ax_v = res; | |
872 | next_pc += sizeof(struct binary_op); | |
873 | PO; | |
874 | } | |
875 | OP(FILTER_OP_NE_STAR_GLOB_STRING): | |
876 | { | |
877 | int res; | |
878 | ||
879 | res = (stack_star_glob_match(stack, top, "!=") != 0); | |
880 | estack_pop(stack, top, ax, bx); | |
881 | estack_ax_v = res; | |
882 | next_pc += sizeof(struct binary_op); | |
883 | PO; | |
884 | } | |
885 | ||
07dfc1d0 MD |
886 | OP(FILTER_OP_EQ_S64): |
887 | { | |
888 | int res; | |
889 | ||
890 | res = (estack_bx_v == estack_ax_v); | |
891 | estack_pop(stack, top, ax, bx); | |
892 | estack_ax_v = res; | |
893 | next_pc += sizeof(struct binary_op); | |
894 | PO; | |
895 | } | |
896 | OP(FILTER_OP_NE_S64): | |
897 | { | |
898 | int res; | |
899 | ||
900 | res = (estack_bx_v != estack_ax_v); | |
901 | estack_pop(stack, top, ax, bx); | |
902 | estack_ax_v = res; | |
903 | next_pc += sizeof(struct binary_op); | |
904 | PO; | |
905 | } | |
906 | OP(FILTER_OP_GT_S64): | |
907 | { | |
908 | int res; | |
909 | ||
910 | res = (estack_bx_v > estack_ax_v); | |
911 | estack_pop(stack, top, ax, bx); | |
912 | estack_ax_v = res; | |
913 | next_pc += sizeof(struct binary_op); | |
914 | PO; | |
915 | } | |
916 | OP(FILTER_OP_LT_S64): | |
917 | { | |
918 | int res; | |
919 | ||
920 | res = (estack_bx_v < estack_ax_v); | |
921 | estack_pop(stack, top, ax, bx); | |
922 | estack_ax_v = res; | |
923 | next_pc += sizeof(struct binary_op); | |
924 | PO; | |
925 | } | |
926 | OP(FILTER_OP_GE_S64): | |
927 | { | |
928 | int res; | |
929 | ||
930 | res = (estack_bx_v >= estack_ax_v); | |
931 | estack_pop(stack, top, ax, bx); | |
932 | estack_ax_v = res; | |
933 | next_pc += sizeof(struct binary_op); | |
934 | PO; | |
935 | } | |
936 | OP(FILTER_OP_LE_S64): | |
937 | { | |
938 | int res; | |
939 | ||
940 | res = (estack_bx_v <= estack_ax_v); | |
941 | estack_pop(stack, top, ax, bx); | |
942 | estack_ax_v = res; | |
943 | next_pc += sizeof(struct binary_op); | |
944 | PO; | |
945 | } | |
946 | ||
947 | OP(FILTER_OP_EQ_DOUBLE): | |
948 | OP(FILTER_OP_NE_DOUBLE): | |
949 | OP(FILTER_OP_GT_DOUBLE): | |
950 | OP(FILTER_OP_LT_DOUBLE): | |
951 | OP(FILTER_OP_GE_DOUBLE): | |
952 | OP(FILTER_OP_LE_DOUBLE): | |
953 | { | |
954 | BUG_ON(1); | |
955 | PO; | |
956 | } | |
957 | ||
958 | /* Mixed S64-double binary comparators */ | |
959 | OP(FILTER_OP_EQ_DOUBLE_S64): | |
960 | OP(FILTER_OP_NE_DOUBLE_S64): | |
961 | OP(FILTER_OP_GT_DOUBLE_S64): | |
962 | OP(FILTER_OP_LT_DOUBLE_S64): | |
963 | OP(FILTER_OP_GE_DOUBLE_S64): | |
964 | OP(FILTER_OP_LE_DOUBLE_S64): | |
965 | OP(FILTER_OP_EQ_S64_DOUBLE): | |
966 | OP(FILTER_OP_NE_S64_DOUBLE): | |
967 | OP(FILTER_OP_GT_S64_DOUBLE): | |
968 | OP(FILTER_OP_LT_S64_DOUBLE): | |
969 | OP(FILTER_OP_GE_S64_DOUBLE): | |
970 | OP(FILTER_OP_LE_S64_DOUBLE): | |
971 | { | |
972 | BUG_ON(1); | |
973 | PO; | |
974 | } | |
e16c054b MD |
975 | OP(FILTER_OP_BIT_RSHIFT): |
976 | { | |
977 | int64_t res; | |
978 | ||
ea13ec96 MD |
979 | /* Catch undefined behavior. */ |
980 | if (unlikely(estack_ax_v < 0 || estack_ax_v >= 64)) { | |
981 | ret = -EINVAL; | |
982 | goto end; | |
983 | } | |
f8d42740 | 984 | res = ((uint64_t) estack_bx_v >> (uint32_t) estack_ax_v); |
e16c054b MD |
985 | estack_pop(stack, top, ax, bx); |
986 | estack_ax_v = res; | |
987 | next_pc += sizeof(struct binary_op); | |
988 | PO; | |
989 | } | |
990 | OP(FILTER_OP_BIT_LSHIFT): | |
991 | { | |
992 | int64_t res; | |
993 | ||
ea13ec96 MD |
994 | /* Catch undefined behavior. */ |
995 | if (unlikely(estack_ax_v < 0 || estack_ax_v >= 64)) { | |
996 | ret = -EINVAL; | |
997 | goto end; | |
998 | } | |
f8d42740 | 999 | res = ((uint64_t) estack_bx_v << (uint32_t) estack_ax_v); |
e16c054b MD |
1000 | estack_pop(stack, top, ax, bx); |
1001 | estack_ax_v = res; | |
1002 | next_pc += sizeof(struct binary_op); | |
1003 | PO; | |
1004 | } | |
3834b99f MD |
1005 | OP(FILTER_OP_BIT_AND): |
1006 | { | |
1007 | int64_t res; | |
1008 | ||
f8d42740 | 1009 | res = ((uint64_t) estack_bx_v & (uint64_t) estack_ax_v); |
3834b99f MD |
1010 | estack_pop(stack, top, ax, bx); |
1011 | estack_ax_v = res; | |
1012 | next_pc += sizeof(struct binary_op); | |
1013 | PO; | |
1014 | } | |
1015 | OP(FILTER_OP_BIT_OR): | |
1016 | { | |
1017 | int64_t res; | |
1018 | ||
f8d42740 | 1019 | res = ((uint64_t) estack_bx_v | (uint64_t) estack_ax_v); |
3834b99f MD |
1020 | estack_pop(stack, top, ax, bx); |
1021 | estack_ax_v = res; | |
1022 | next_pc += sizeof(struct binary_op); | |
1023 | PO; | |
1024 | } | |
1025 | OP(FILTER_OP_BIT_XOR): | |
1026 | { | |
1027 | int64_t res; | |
1028 | ||
f8d42740 | 1029 | res = ((uint64_t) estack_bx_v ^ (uint64_t) estack_ax_v); |
3834b99f MD |
1030 | estack_pop(stack, top, ax, bx); |
1031 | estack_ax_v = res; | |
1032 | next_pc += sizeof(struct binary_op); | |
1033 | PO; | |
1034 | } | |
07dfc1d0 MD |
1035 | |
1036 | /* unary */ | |
1037 | OP(FILTER_OP_UNARY_PLUS): | |
1038 | OP(FILTER_OP_UNARY_MINUS): | |
1039 | OP(FILTER_OP_UNARY_NOT): | |
1040 | printk(KERN_WARNING "unsupported non-specialized bytecode op %u\n", | |
1041 | (unsigned int) *(filter_opcode_t *) pc); | |
1042 | ret = -EINVAL; | |
1043 | goto end; | |
1044 | ||
1045 | ||
e16c054b MD |
1046 | OP(FILTER_OP_UNARY_BIT_NOT): |
1047 | { | |
f8d42740 | 1048 | estack_ax_v = ~(uint64_t) estack_ax_v; |
e16c054b MD |
1049 | next_pc += sizeof(struct unary_op); |
1050 | PO; | |
1051 | } | |
1052 | ||
07dfc1d0 MD |
1053 | OP(FILTER_OP_UNARY_PLUS_S64): |
1054 | { | |
1055 | next_pc += sizeof(struct unary_op); | |
1056 | PO; | |
1057 | } | |
1058 | OP(FILTER_OP_UNARY_MINUS_S64): | |
1059 | { | |
1060 | estack_ax_v = -estack_ax_v; | |
1061 | next_pc += sizeof(struct unary_op); | |
1062 | PO; | |
1063 | } | |
1064 | OP(FILTER_OP_UNARY_PLUS_DOUBLE): | |
1065 | OP(FILTER_OP_UNARY_MINUS_DOUBLE): | |
1066 | { | |
1067 | BUG_ON(1); | |
1068 | PO; | |
1069 | } | |
1070 | OP(FILTER_OP_UNARY_NOT_S64): | |
1071 | { | |
1072 | estack_ax_v = !estack_ax_v; | |
1073 | next_pc += sizeof(struct unary_op); | |
1074 | PO; | |
1075 | } | |
1076 | OP(FILTER_OP_UNARY_NOT_DOUBLE): | |
1077 | { | |
1078 | BUG_ON(1); | |
1079 | PO; | |
1080 | } | |
1081 | ||
1082 | /* logical */ | |
1083 | OP(FILTER_OP_AND): | |
1084 | { | |
1085 | struct logical_op *insn = (struct logical_op *) pc; | |
1086 | ||
1087 | /* If AX is 0, skip and evaluate to 0 */ | |
1088 | if (unlikely(estack_ax_v == 0)) { | |
1089 | dbg_printk("Jumping to bytecode offset %u\n", | |
1090 | (unsigned int) insn->skip_offset); | |
1091 | next_pc = start_pc + insn->skip_offset; | |
1092 | } else { | |
1093 | /* Pop 1 when jump not taken */ | |
1094 | estack_pop(stack, top, ax, bx); | |
1095 | next_pc += sizeof(struct logical_op); | |
1096 | } | |
1097 | PO; | |
1098 | } | |
1099 | OP(FILTER_OP_OR): | |
1100 | { | |
1101 | struct logical_op *insn = (struct logical_op *) pc; | |
1102 | ||
1103 | /* If AX is nonzero, skip and evaluate to 1 */ | |
1104 | ||
1105 | if (unlikely(estack_ax_v != 0)) { | |
1106 | estack_ax_v = 1; | |
1107 | dbg_printk("Jumping to bytecode offset %u\n", | |
1108 | (unsigned int) insn->skip_offset); | |
1109 | next_pc = start_pc + insn->skip_offset; | |
1110 | } else { | |
1111 | /* Pop 1 when jump not taken */ | |
1112 | estack_pop(stack, top, ax, bx); | |
1113 | next_pc += sizeof(struct logical_op); | |
1114 | } | |
1115 | PO; | |
1116 | } | |
1117 | ||
1118 | ||
1119 | /* load field ref */ | |
1120 | OP(FILTER_OP_LOAD_FIELD_REF_STRING): | |
1121 | { | |
1122 | struct load_op *insn = (struct load_op *) pc; | |
1123 | struct field_ref *ref = (struct field_ref *) insn->data; | |
1124 | ||
1125 | dbg_printk("load field ref offset %u type string\n", | |
1126 | ref->offset); | |
1127 | estack_push(stack, top, ax, bx); | |
1128 | estack_ax(stack, top)->u.s.str = | |
1129 | *(const char * const *) &filter_stack_data[ref->offset]; | |
1130 | if (unlikely(!estack_ax(stack, top)->u.s.str)) { | |
1131 | dbg_printk("Filter warning: loading a NULL string.\n"); | |
1132 | ret = -EINVAL; | |
1133 | goto end; | |
1134 | } | |
cbc19040 | 1135 | estack_ax(stack, top)->u.s.seq_len = LTTNG_SIZE_MAX; |
02aca193 PP |
1136 | estack_ax(stack, top)->u.s.literal_type = |
1137 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
f127e61e | 1138 | estack_ax(stack, top)->u.s.user = 0; |
07dfc1d0 MD |
1139 | dbg_printk("ref load string %s\n", estack_ax(stack, top)->u.s.str); |
1140 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
1141 | PO; | |
1142 | } | |
1143 | ||
1144 | OP(FILTER_OP_LOAD_FIELD_REF_SEQUENCE): | |
1145 | { | |
1146 | struct load_op *insn = (struct load_op *) pc; | |
1147 | struct field_ref *ref = (struct field_ref *) insn->data; | |
1148 | ||
1149 | dbg_printk("load field ref offset %u type sequence\n", | |
1150 | ref->offset); | |
1151 | estack_push(stack, top, ax, bx); | |
1152 | estack_ax(stack, top)->u.s.seq_len = | |
1153 | *(unsigned long *) &filter_stack_data[ref->offset]; | |
1154 | estack_ax(stack, top)->u.s.str = | |
1155 | *(const char **) (&filter_stack_data[ref->offset | |
1156 | + sizeof(unsigned long)]); | |
1157 | if (unlikely(!estack_ax(stack, top)->u.s.str)) { | |
1158 | dbg_printk("Filter warning: loading a NULL sequence.\n"); | |
1159 | ret = -EINVAL; | |
1160 | goto end; | |
1161 | } | |
02aca193 PP |
1162 | estack_ax(stack, top)->u.s.literal_type = |
1163 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
f127e61e | 1164 | estack_ax(stack, top)->u.s.user = 0; |
07dfc1d0 MD |
1165 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); |
1166 | PO; | |
1167 | } | |
1168 | ||
1169 | OP(FILTER_OP_LOAD_FIELD_REF_S64): | |
1170 | { | |
1171 | struct load_op *insn = (struct load_op *) pc; | |
1172 | struct field_ref *ref = (struct field_ref *) insn->data; | |
1173 | ||
1174 | dbg_printk("load field ref offset %u type s64\n", | |
1175 | ref->offset); | |
1176 | estack_push(stack, top, ax, bx); | |
1177 | estack_ax_v = | |
1178 | ((struct literal_numeric *) &filter_stack_data[ref->offset])->v; | |
1179 | dbg_printk("ref load s64 %lld\n", | |
1180 | (long long) estack_ax_v); | |
1181 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
1182 | PO; | |
1183 | } | |
1184 | ||
1185 | OP(FILTER_OP_LOAD_FIELD_REF_DOUBLE): | |
1186 | { | |
1187 | BUG_ON(1); | |
1188 | PO; | |
1189 | } | |
1190 | ||
1191 | /* load from immediate operand */ | |
1192 | OP(FILTER_OP_LOAD_STRING): | |
1193 | { | |
1194 | struct load_op *insn = (struct load_op *) pc; | |
1195 | ||
1196 | dbg_printk("load string %s\n", insn->data); | |
1197 | estack_push(stack, top, ax, bx); | |
1198 | estack_ax(stack, top)->u.s.str = insn->data; | |
cbc19040 | 1199 | estack_ax(stack, top)->u.s.seq_len = LTTNG_SIZE_MAX; |
02aca193 PP |
1200 | estack_ax(stack, top)->u.s.literal_type = |
1201 | ESTACK_STRING_LITERAL_TYPE_PLAIN; | |
1202 | estack_ax(stack, top)->u.s.user = 0; | |
1203 | next_pc += sizeof(struct load_op) + strlen(insn->data) + 1; | |
1204 | PO; | |
1205 | } | |
1206 | ||
1207 | OP(FILTER_OP_LOAD_STAR_GLOB_STRING): | |
1208 | { | |
1209 | struct load_op *insn = (struct load_op *) pc; | |
1210 | ||
1211 | dbg_printk("load globbing pattern %s\n", insn->data); | |
1212 | estack_push(stack, top, ax, bx); | |
1213 | estack_ax(stack, top)->u.s.str = insn->data; | |
cbc19040 | 1214 | estack_ax(stack, top)->u.s.seq_len = LTTNG_SIZE_MAX; |
02aca193 PP |
1215 | estack_ax(stack, top)->u.s.literal_type = |
1216 | ESTACK_STRING_LITERAL_TYPE_STAR_GLOB; | |
f127e61e | 1217 | estack_ax(stack, top)->u.s.user = 0; |
07dfc1d0 MD |
1218 | next_pc += sizeof(struct load_op) + strlen(insn->data) + 1; |
1219 | PO; | |
1220 | } | |
1221 | ||
1222 | OP(FILTER_OP_LOAD_S64): | |
1223 | { | |
1224 | struct load_op *insn = (struct load_op *) pc; | |
1225 | ||
1226 | estack_push(stack, top, ax, bx); | |
1227 | estack_ax_v = ((struct literal_numeric *) insn->data)->v; | |
1228 | dbg_printk("load s64 %lld\n", | |
1229 | (long long) estack_ax_v); | |
1230 | next_pc += sizeof(struct load_op) | |
1231 | + sizeof(struct literal_numeric); | |
1232 | PO; | |
1233 | } | |
1234 | ||
1235 | OP(FILTER_OP_LOAD_DOUBLE): | |
1236 | { | |
1237 | BUG_ON(1); | |
1238 | PO; | |
1239 | } | |
1240 | ||
1241 | /* cast */ | |
1242 | OP(FILTER_OP_CAST_TO_S64): | |
1243 | printk(KERN_WARNING "unsupported non-specialized bytecode op %u\n", | |
1244 | (unsigned int) *(filter_opcode_t *) pc); | |
1245 | ret = -EINVAL; | |
1246 | goto end; | |
1247 | ||
1248 | OP(FILTER_OP_CAST_DOUBLE_TO_S64): | |
1249 | { | |
1250 | BUG_ON(1); | |
1251 | PO; | |
1252 | } | |
1253 | ||
1254 | OP(FILTER_OP_CAST_NOP): | |
1255 | { | |
1256 | next_pc += sizeof(struct cast_op); | |
1257 | PO; | |
1258 | } | |
1259 | ||
1260 | /* get context ref */ | |
1261 | OP(FILTER_OP_GET_CONTEXT_REF_STRING): | |
1262 | { | |
1263 | struct load_op *insn = (struct load_op *) pc; | |
1264 | struct field_ref *ref = (struct field_ref *) insn->data; | |
1265 | struct lttng_ctx_field *ctx_field; | |
1266 | union lttng_ctx_value v; | |
1267 | ||
1268 | dbg_printk("get context ref offset %u type string\n", | |
1269 | ref->offset); | |
1270 | ctx_field = <tng_static_ctx->fields[ref->offset]; | |
79150a49 | 1271 | ctx_field->get_value(ctx_field, lttng_probe_ctx, &v); |
07dfc1d0 MD |
1272 | estack_push(stack, top, ax, bx); |
1273 | estack_ax(stack, top)->u.s.str = v.str; | |
1274 | if (unlikely(!estack_ax(stack, top)->u.s.str)) { | |
1275 | dbg_printk("Filter warning: loading a NULL string.\n"); | |
1276 | ret = -EINVAL; | |
1277 | goto end; | |
1278 | } | |
cbc19040 | 1279 | estack_ax(stack, top)->u.s.seq_len = LTTNG_SIZE_MAX; |
02aca193 PP |
1280 | estack_ax(stack, top)->u.s.literal_type = |
1281 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
f127e61e | 1282 | estack_ax(stack, top)->u.s.user = 0; |
07dfc1d0 MD |
1283 | dbg_printk("ref get context string %s\n", estack_ax(stack, top)->u.s.str); |
1284 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
1285 | PO; | |
1286 | } | |
1287 | ||
1288 | OP(FILTER_OP_GET_CONTEXT_REF_S64): | |
1289 | { | |
1290 | struct load_op *insn = (struct load_op *) pc; | |
1291 | struct field_ref *ref = (struct field_ref *) insn->data; | |
1292 | struct lttng_ctx_field *ctx_field; | |
1293 | union lttng_ctx_value v; | |
1294 | ||
1295 | dbg_printk("get context ref offset %u type s64\n", | |
1296 | ref->offset); | |
1297 | ctx_field = <tng_static_ctx->fields[ref->offset]; | |
79150a49 | 1298 | ctx_field->get_value(ctx_field, lttng_probe_ctx, &v); |
07dfc1d0 MD |
1299 | estack_push(stack, top, ax, bx); |
1300 | estack_ax_v = v.s64; | |
1301 | dbg_printk("ref get context s64 %lld\n", | |
1302 | (long long) estack_ax_v); | |
1303 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
1304 | PO; | |
1305 | } | |
1306 | ||
1307 | OP(FILTER_OP_GET_CONTEXT_REF_DOUBLE): | |
1308 | { | |
1309 | BUG_ON(1); | |
1310 | PO; | |
1311 | } | |
1312 | ||
f127e61e MD |
1313 | /* load userspace field ref */ |
1314 | OP(FILTER_OP_LOAD_FIELD_REF_USER_STRING): | |
1315 | { | |
1316 | struct load_op *insn = (struct load_op *) pc; | |
1317 | struct field_ref *ref = (struct field_ref *) insn->data; | |
1318 | ||
1319 | dbg_printk("load field ref offset %u type user string\n", | |
1320 | ref->offset); | |
1321 | estack_push(stack, top, ax, bx); | |
5b4ad89f | 1322 | estack_ax(stack, top)->u.s.user_str = |
f127e61e MD |
1323 | *(const char * const *) &filter_stack_data[ref->offset]; |
1324 | if (unlikely(!estack_ax(stack, top)->u.s.str)) { | |
1325 | dbg_printk("Filter warning: loading a NULL string.\n"); | |
1326 | ret = -EINVAL; | |
1327 | goto end; | |
1328 | } | |
cbc19040 | 1329 | estack_ax(stack, top)->u.s.seq_len = LTTNG_SIZE_MAX; |
02aca193 PP |
1330 | estack_ax(stack, top)->u.s.literal_type = |
1331 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
f127e61e MD |
1332 | estack_ax(stack, top)->u.s.user = 1; |
1333 | dbg_printk("ref load string %s\n", estack_ax(stack, top)->u.s.str); | |
1334 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
1335 | PO; | |
1336 | } | |
1337 | ||
1338 | OP(FILTER_OP_LOAD_FIELD_REF_USER_SEQUENCE): | |
1339 | { | |
1340 | struct load_op *insn = (struct load_op *) pc; | |
1341 | struct field_ref *ref = (struct field_ref *) insn->data; | |
1342 | ||
1343 | dbg_printk("load field ref offset %u type user sequence\n", | |
1344 | ref->offset); | |
1345 | estack_push(stack, top, ax, bx); | |
1346 | estack_ax(stack, top)->u.s.seq_len = | |
1347 | *(unsigned long *) &filter_stack_data[ref->offset]; | |
5b4ad89f | 1348 | estack_ax(stack, top)->u.s.user_str = |
f127e61e MD |
1349 | *(const char **) (&filter_stack_data[ref->offset |
1350 | + sizeof(unsigned long)]); | |
1351 | if (unlikely(!estack_ax(stack, top)->u.s.str)) { | |
1352 | dbg_printk("Filter warning: loading a NULL sequence.\n"); | |
1353 | ret = -EINVAL; | |
1354 | goto end; | |
1355 | } | |
02aca193 PP |
1356 | estack_ax(stack, top)->u.s.literal_type = |
1357 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
f127e61e MD |
1358 | estack_ax(stack, top)->u.s.user = 1; |
1359 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
1360 | PO; | |
1361 | } | |
1362 | ||
3834b99f MD |
1363 | OP(FILTER_OP_GET_CONTEXT_ROOT): |
1364 | { | |
1365 | dbg_printk("op get context root\n"); | |
1366 | estack_push(stack, top, ax, bx); | |
1367 | estack_ax(stack, top)->u.ptr.type = LOAD_ROOT_CONTEXT; | |
1368 | /* "field" only needed for variants. */ | |
1369 | estack_ax(stack, top)->u.ptr.field = NULL; | |
1370 | next_pc += sizeof(struct load_op); | |
1371 | PO; | |
1372 | } | |
1373 | ||
1374 | OP(FILTER_OP_GET_APP_CONTEXT_ROOT): | |
1375 | { | |
1376 | BUG_ON(1); | |
1377 | PO; | |
1378 | } | |
1379 | ||
1380 | OP(FILTER_OP_GET_PAYLOAD_ROOT): | |
1381 | { | |
1382 | dbg_printk("op get app payload root\n"); | |
1383 | estack_push(stack, top, ax, bx); | |
1384 | estack_ax(stack, top)->u.ptr.type = LOAD_ROOT_PAYLOAD; | |
1385 | estack_ax(stack, top)->u.ptr.ptr = filter_stack_data; | |
1386 | /* "field" only needed for variants. */ | |
1387 | estack_ax(stack, top)->u.ptr.field = NULL; | |
1388 | next_pc += sizeof(struct load_op); | |
1389 | PO; | |
1390 | } | |
1391 | ||
1392 | OP(FILTER_OP_GET_SYMBOL): | |
1393 | { | |
1394 | dbg_printk("op get symbol\n"); | |
1395 | switch (estack_ax(stack, top)->u.ptr.type) { | |
1396 | case LOAD_OBJECT: | |
1397 | printk(KERN_WARNING "Nested fields not implemented yet.\n"); | |
1398 | ret = -EINVAL; | |
1399 | goto end; | |
1400 | case LOAD_ROOT_CONTEXT: | |
1401 | case LOAD_ROOT_APP_CONTEXT: | |
1402 | case LOAD_ROOT_PAYLOAD: | |
1403 | /* | |
1404 | * symbol lookup is performed by | |
1405 | * specialization. | |
1406 | */ | |
1407 | ret = -EINVAL; | |
1408 | goto end; | |
1409 | } | |
1410 | next_pc += sizeof(struct load_op) + sizeof(struct get_symbol); | |
1411 | PO; | |
1412 | } | |
1413 | ||
1414 | OP(FILTER_OP_GET_SYMBOL_FIELD): | |
1415 | { | |
1416 | /* | |
1417 | * Used for first variant encountered in a | |
1418 | * traversal. Variants are not implemented yet. | |
1419 | */ | |
1420 | ret = -EINVAL; | |
1421 | goto end; | |
1422 | } | |
1423 | ||
1424 | OP(FILTER_OP_GET_INDEX_U16): | |
1425 | { | |
1426 | struct load_op *insn = (struct load_op *) pc; | |
1427 | struct get_index_u16 *index = (struct get_index_u16 *) insn->data; | |
1428 | ||
1429 | dbg_printk("op get index u16\n"); | |
1430 | ret = dynamic_get_index(lttng_probe_ctx, bytecode, index->index, estack_ax(stack, top)); | |
1431 | if (ret) | |
1432 | goto end; | |
1433 | estack_ax_v = estack_ax(stack, top)->u.v; | |
1434 | next_pc += sizeof(struct load_op) + sizeof(struct get_index_u16); | |
1435 | PO; | |
1436 | } | |
1437 | ||
1438 | OP(FILTER_OP_GET_INDEX_U64): | |
1439 | { | |
1440 | struct load_op *insn = (struct load_op *) pc; | |
1441 | struct get_index_u64 *index = (struct get_index_u64 *) insn->data; | |
1442 | ||
1443 | dbg_printk("op get index u64\n"); | |
1444 | ret = dynamic_get_index(lttng_probe_ctx, bytecode, index->index, estack_ax(stack, top)); | |
1445 | if (ret) | |
1446 | goto end; | |
1447 | estack_ax_v = estack_ax(stack, top)->u.v; | |
1448 | next_pc += sizeof(struct load_op) + sizeof(struct get_index_u64); | |
1449 | PO; | |
1450 | } | |
1451 | ||
1452 | OP(FILTER_OP_LOAD_FIELD): | |
1453 | { | |
1454 | dbg_printk("op load field\n"); | |
1455 | ret = dynamic_load_field(estack_ax(stack, top)); | |
1456 | if (ret) | |
1457 | goto end; | |
1458 | estack_ax_v = estack_ax(stack, top)->u.v; | |
1459 | next_pc += sizeof(struct load_op); | |
1460 | PO; | |
1461 | } | |
1462 | ||
1463 | OP(FILTER_OP_LOAD_FIELD_S8): | |
1464 | { | |
1465 | dbg_printk("op load field s8\n"); | |
1466 | ||
1467 | estack_ax_v = *(int8_t *) estack_ax(stack, top)->u.ptr.ptr; | |
1468 | next_pc += sizeof(struct load_op); | |
1469 | PO; | |
1470 | } | |
1471 | OP(FILTER_OP_LOAD_FIELD_S16): | |
1472 | { | |
1473 | dbg_printk("op load field s16\n"); | |
1474 | ||
1475 | estack_ax_v = *(int16_t *) estack_ax(stack, top)->u.ptr.ptr; | |
1476 | next_pc += sizeof(struct load_op); | |
1477 | PO; | |
1478 | } | |
1479 | OP(FILTER_OP_LOAD_FIELD_S32): | |
1480 | { | |
1481 | dbg_printk("op load field s32\n"); | |
1482 | ||
1483 | estack_ax_v = *(int32_t *) estack_ax(stack, top)->u.ptr.ptr; | |
1484 | next_pc += sizeof(struct load_op); | |
1485 | PO; | |
1486 | } | |
1487 | OP(FILTER_OP_LOAD_FIELD_S64): | |
1488 | { | |
1489 | dbg_printk("op load field s64\n"); | |
1490 | ||
1491 | estack_ax_v = *(int64_t *) estack_ax(stack, top)->u.ptr.ptr; | |
1492 | next_pc += sizeof(struct load_op); | |
1493 | PO; | |
1494 | } | |
1495 | OP(FILTER_OP_LOAD_FIELD_U8): | |
1496 | { | |
1497 | dbg_printk("op load field u8\n"); | |
1498 | ||
1499 | estack_ax_v = *(uint8_t *) estack_ax(stack, top)->u.ptr.ptr; | |
1500 | next_pc += sizeof(struct load_op); | |
1501 | PO; | |
1502 | } | |
1503 | OP(FILTER_OP_LOAD_FIELD_U16): | |
1504 | { | |
1505 | dbg_printk("op load field u16\n"); | |
1506 | ||
1507 | estack_ax_v = *(uint16_t *) estack_ax(stack, top)->u.ptr.ptr; | |
1508 | next_pc += sizeof(struct load_op); | |
1509 | PO; | |
1510 | } | |
1511 | OP(FILTER_OP_LOAD_FIELD_U32): | |
1512 | { | |
1513 | dbg_printk("op load field u32\n"); | |
1514 | ||
1515 | estack_ax_v = *(uint32_t *) estack_ax(stack, top)->u.ptr.ptr; | |
1516 | next_pc += sizeof(struct load_op); | |
1517 | PO; | |
1518 | } | |
1519 | OP(FILTER_OP_LOAD_FIELD_U64): | |
1520 | { | |
1521 | dbg_printk("op load field u64\n"); | |
1522 | ||
1523 | estack_ax_v = *(uint64_t *) estack_ax(stack, top)->u.ptr.ptr; | |
1524 | next_pc += sizeof(struct load_op); | |
1525 | PO; | |
1526 | } | |
1527 | OP(FILTER_OP_LOAD_FIELD_DOUBLE): | |
1528 | { | |
1529 | ret = -EINVAL; | |
1530 | goto end; | |
1531 | } | |
1532 | ||
1533 | OP(FILTER_OP_LOAD_FIELD_STRING): | |
1534 | { | |
1535 | const char *str; | |
1536 | ||
1537 | dbg_printk("op load field string\n"); | |
1538 | str = (const char *) estack_ax(stack, top)->u.ptr.ptr; | |
1539 | estack_ax(stack, top)->u.s.str = str; | |
1540 | if (unlikely(!estack_ax(stack, top)->u.s.str)) { | |
1541 | dbg_printk("Filter warning: loading a NULL string.\n"); | |
1542 | ret = -EINVAL; | |
1543 | goto end; | |
1544 | } | |
4efe037b | 1545 | estack_ax(stack, top)->u.s.seq_len = LTTNG_SIZE_MAX; |
3834b99f MD |
1546 | estack_ax(stack, top)->u.s.literal_type = |
1547 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
1548 | next_pc += sizeof(struct load_op); | |
1549 | PO; | |
1550 | } | |
1551 | ||
1552 | OP(FILTER_OP_LOAD_FIELD_SEQUENCE): | |
1553 | { | |
1554 | const char *ptr; | |
1555 | ||
1556 | dbg_printk("op load field string sequence\n"); | |
1557 | ptr = estack_ax(stack, top)->u.ptr.ptr; | |
1558 | estack_ax(stack, top)->u.s.seq_len = *(unsigned long *) ptr; | |
1559 | estack_ax(stack, top)->u.s.str = *(const char **) (ptr + sizeof(unsigned long)); | |
1560 | if (unlikely(!estack_ax(stack, top)->u.s.str)) { | |
1561 | dbg_printk("Filter warning: loading a NULL sequence.\n"); | |
1562 | ret = -EINVAL; | |
1563 | goto end; | |
1564 | } | |
1565 | estack_ax(stack, top)->u.s.literal_type = | |
1566 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
1567 | next_pc += sizeof(struct load_op); | |
1568 | PO; | |
1569 | } | |
1570 | ||
07dfc1d0 MD |
1571 | END_OP |
1572 | end: | |
1573 | /* return 0 (discard) on error */ | |
1574 | if (ret) | |
1575 | return 0; | |
1576 | return retval; | |
1577 | } | |
1578 | ||
1579 | #undef START_OP | |
1580 | #undef OP | |
1581 | #undef PO | |
1582 | #undef END_OP |