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 | ||
02fd5eae | 10 | #include <wrapper/uaccess.h> |
8e4e8641 | 11 | #include <wrapper/objtool.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 | |
2fb96b52 | 25 | char get_char(const struct estack_entry *reg, size_t offset) |
f127e61e MD |
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. */ | |
02fd5eae | 33 | if (unlikely(!lttng_access_ok(VERIFY_READ, |
f127e61e MD |
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; | |
02aca193 PP |
84 | int result; |
85 | struct estack_entry *pattern_reg; | |
86 | struct estack_entry *candidate_reg; | |
87 | ||
5facfb7b | 88 | /* Disable the page fault handler when reading from userspace. */ |
02aca193 PP |
89 | if (estack_bx(stack, top)->u.s.user |
90 | || estack_ax(stack, top)->u.s.user) { | |
91 | has_user = true; | |
02aca193 PP |
92 | pagefault_disable(); |
93 | } | |
94 | ||
95 | /* Find out which side is the pattern vs. the candidate. */ | |
96 | if (estack_ax(stack, top)->u.s.literal_type == ESTACK_STRING_LITERAL_TYPE_STAR_GLOB) { | |
97 | pattern_reg = estack_ax(stack, top); | |
98 | candidate_reg = estack_bx(stack, top); | |
99 | } else { | |
100 | pattern_reg = estack_bx(stack, top); | |
101 | candidate_reg = estack_ax(stack, top); | |
102 | } | |
103 | ||
104 | /* Perform the match operation. */ | |
105 | result = !strutils_star_glob_match_char_cb(get_char_at_cb, | |
106 | pattern_reg, get_char_at_cb, candidate_reg); | |
5facfb7b | 107 | if (has_user) |
02aca193 | 108 | pagefault_enable(); |
02aca193 PP |
109 | |
110 | return result; | |
111 | } | |
112 | ||
07dfc1d0 MD |
113 | static |
114 | int stack_strcmp(struct estack *stack, int top, const char *cmp_type) | |
115 | { | |
f127e61e MD |
116 | size_t offset_bx = 0, offset_ax = 0; |
117 | int diff, has_user = 0; | |
f127e61e MD |
118 | |
119 | if (estack_bx(stack, top)->u.s.user | |
120 | || estack_ax(stack, top)->u.s.user) { | |
121 | has_user = 1; | |
f127e61e MD |
122 | pagefault_disable(); |
123 | } | |
07dfc1d0 MD |
124 | |
125 | for (;;) { | |
f127e61e | 126 | int ret; |
07dfc1d0 | 127 | int escaped_r0 = 0; |
f127e61e | 128 | char char_bx, char_ax; |
07dfc1d0 | 129 | |
f127e61e MD |
130 | char_bx = get_char(estack_bx(stack, top), offset_bx); |
131 | char_ax = get_char(estack_ax(stack, top), offset_ax); | |
132 | ||
133 | if (unlikely(char_bx == '\0')) { | |
134 | if (char_ax == '\0') { | |
135 | diff = 0; | |
136 | break; | |
07dfc1d0 | 137 | } else { |
02aca193 PP |
138 | if (estack_ax(stack, top)->u.s.literal_type == |
139 | ESTACK_STRING_LITERAL_TYPE_PLAIN) { | |
f127e61e MD |
140 | ret = parse_char(estack_ax(stack, top), |
141 | &char_ax, &offset_ax); | |
142 | if (ret == -1) { | |
143 | diff = 0; | |
144 | break; | |
145 | } | |
07dfc1d0 | 146 | } |
f127e61e MD |
147 | diff = -1; |
148 | break; | |
07dfc1d0 MD |
149 | } |
150 | } | |
f127e61e | 151 | if (unlikely(char_ax == '\0')) { |
02aca193 PP |
152 | if (estack_bx(stack, top)->u.s.literal_type == |
153 | ESTACK_STRING_LITERAL_TYPE_PLAIN) { | |
abfd272b MD |
154 | ret = parse_char(estack_bx(stack, top), |
155 | &char_bx, &offset_bx); | |
156 | if (ret == -1) { | |
157 | diff = 0; | |
158 | break; | |
07dfc1d0 | 159 | } |
07dfc1d0 | 160 | } |
abfd272b MD |
161 | diff = 1; |
162 | break; | |
07dfc1d0 | 163 | } |
02aca193 PP |
164 | if (estack_bx(stack, top)->u.s.literal_type == |
165 | ESTACK_STRING_LITERAL_TYPE_PLAIN) { | |
f127e61e MD |
166 | ret = parse_char(estack_bx(stack, top), |
167 | &char_bx, &offset_bx); | |
07dfc1d0 | 168 | if (ret == -1) { |
f127e61e MD |
169 | diff = 0; |
170 | break; | |
07dfc1d0 MD |
171 | } else if (ret == -2) { |
172 | escaped_r0 = 1; | |
173 | } | |
174 | /* else compare both char */ | |
175 | } | |
02aca193 PP |
176 | if (estack_ax(stack, top)->u.s.literal_type == |
177 | ESTACK_STRING_LITERAL_TYPE_PLAIN) { | |
f127e61e MD |
178 | ret = parse_char(estack_ax(stack, top), |
179 | &char_ax, &offset_ax); | |
07dfc1d0 | 180 | if (ret == -1) { |
f127e61e MD |
181 | diff = 0; |
182 | break; | |
07dfc1d0 | 183 | } else if (ret == -2) { |
f127e61e MD |
184 | if (!escaped_r0) { |
185 | diff = -1; | |
186 | break; | |
187 | } | |
07dfc1d0 | 188 | } else { |
f127e61e MD |
189 | if (escaped_r0) { |
190 | diff = 1; | |
191 | break; | |
192 | } | |
07dfc1d0 MD |
193 | } |
194 | } else { | |
f127e61e MD |
195 | if (escaped_r0) { |
196 | diff = 1; | |
197 | break; | |
198 | } | |
07dfc1d0 | 199 | } |
f127e61e | 200 | diff = char_bx - char_ax; |
07dfc1d0 MD |
201 | if (diff != 0) |
202 | break; | |
f127e61e MD |
203 | offset_bx++; |
204 | offset_ax++; | |
205 | } | |
5facfb7b | 206 | if (has_user) |
f127e61e | 207 | pagefault_enable(); |
5facfb7b | 208 | |
07dfc1d0 MD |
209 | return diff; |
210 | } | |
211 | ||
212 | uint64_t lttng_filter_false(void *filter_data, | |
79150a49 | 213 | struct lttng_probe_ctx *lttng_probe_ctx, |
07dfc1d0 MD |
214 | const char *filter_stack_data) |
215 | { | |
216 | return 0; | |
217 | } | |
218 | ||
219 | #ifdef INTERPRETER_USE_SWITCH | |
220 | ||
221 | /* | |
222 | * Fallback for compilers that do not support taking address of labels. | |
223 | */ | |
224 | ||
225 | #define START_OP \ | |
226 | start_pc = &bytecode->data[0]; \ | |
227 | for (pc = next_pc = start_pc; pc - start_pc < bytecode->len; \ | |
228 | pc = next_pc) { \ | |
229 | dbg_printk("Executing op %s (%u)\n", \ | |
230 | lttng_filter_print_op((unsigned int) *(filter_opcode_t *) pc), \ | |
231 | (unsigned int) *(filter_opcode_t *) pc); \ | |
232 | switch (*(filter_opcode_t *) pc) { | |
233 | ||
234 | #define OP(name) case name | |
235 | ||
236 | #define PO break | |
237 | ||
238 | #define END_OP } \ | |
239 | } | |
240 | ||
241 | #else | |
242 | ||
243 | /* | |
244 | * Dispatch-table based interpreter. | |
245 | */ | |
246 | ||
247 | #define START_OP \ | |
3834b99f | 248 | start_pc = &bytecode->code[0]; \ |
07dfc1d0 MD |
249 | pc = next_pc = start_pc; \ |
250 | if (unlikely(pc - start_pc >= bytecode->len)) \ | |
251 | goto end; \ | |
252 | goto *dispatch[*(filter_opcode_t *) pc]; | |
253 | ||
254 | #define OP(name) \ | |
255 | LABEL_##name | |
256 | ||
257 | #define PO \ | |
258 | pc = next_pc; \ | |
259 | goto *dispatch[*(filter_opcode_t *) pc]; | |
260 | ||
261 | #define END_OP | |
262 | ||
263 | #endif | |
264 | ||
3834b99f MD |
265 | static int context_get_index(struct lttng_probe_ctx *lttng_probe_ctx, |
266 | struct load_ptr *ptr, | |
267 | uint32_t idx) | |
268 | { | |
269 | ||
270 | struct lttng_ctx_field *ctx_field; | |
271 | struct lttng_event_field *field; | |
272 | union lttng_ctx_value v; | |
273 | ||
274 | ctx_field = <tng_static_ctx->fields[idx]; | |
275 | field = &ctx_field->event_field; | |
276 | ptr->type = LOAD_OBJECT; | |
277 | /* field is only used for types nested within variants. */ | |
278 | ptr->field = NULL; | |
279 | ||
280 | switch (field->type.atype) { | |
281 | case atype_integer: | |
282 | ctx_field->get_value(ctx_field, lttng_probe_ctx, &v); | |
283 | if (field->type.u.basic.integer.signedness) { | |
284 | ptr->object_type = OBJECT_TYPE_S64; | |
285 | ptr->u.s64 = v.s64; | |
286 | ptr->ptr = &ptr->u.s64; | |
287 | } else { | |
288 | ptr->object_type = OBJECT_TYPE_U64; | |
289 | ptr->u.u64 = v.s64; /* Cast. */ | |
290 | ptr->ptr = &ptr->u.u64; | |
291 | } | |
292 | break; | |
293 | case atype_enum: | |
294 | { | |
295 | const struct lttng_integer_type *itype = | |
296 | &field->type.u.basic.enumeration.container_type; | |
297 | ||
298 | ctx_field->get_value(ctx_field, lttng_probe_ctx, &v); | |
299 | if (itype->signedness) { | |
300 | ptr->object_type = OBJECT_TYPE_S64; | |
301 | ptr->u.s64 = v.s64; | |
302 | ptr->ptr = &ptr->u.s64; | |
303 | } else { | |
304 | ptr->object_type = OBJECT_TYPE_U64; | |
305 | ptr->u.u64 = v.s64; /* Cast. */ | |
306 | ptr->ptr = &ptr->u.u64; | |
307 | } | |
308 | break; | |
309 | } | |
310 | case atype_array: | |
311 | if (field->type.u.array.elem_type.atype != atype_integer) { | |
312 | printk(KERN_WARNING "Array nesting only supports integer types.\n"); | |
313 | return -EINVAL; | |
314 | } | |
315 | if (field->type.u.array.elem_type.u.basic.integer.encoding == lttng_encode_none) { | |
316 | printk(KERN_WARNING "Only string arrays are supported for contexts.\n"); | |
317 | return -EINVAL; | |
318 | } | |
319 | ptr->object_type = OBJECT_TYPE_STRING; | |
320 | ctx_field->get_value(ctx_field, lttng_probe_ctx, &v); | |
321 | ptr->ptr = v.str; | |
322 | break; | |
323 | case atype_sequence: | |
324 | if (field->type.u.sequence.elem_type.atype != atype_integer) { | |
325 | printk(KERN_WARNING "Sequence nesting only supports integer types.\n"); | |
326 | return -EINVAL; | |
327 | } | |
328 | if (field->type.u.sequence.elem_type.u.basic.integer.encoding == lttng_encode_none) { | |
329 | printk(KERN_WARNING "Only string sequences are supported for contexts.\n"); | |
330 | return -EINVAL; | |
331 | } | |
332 | ptr->object_type = OBJECT_TYPE_STRING; | |
333 | ctx_field->get_value(ctx_field, lttng_probe_ctx, &v); | |
334 | ptr->ptr = v.str; | |
335 | break; | |
336 | case atype_array_bitfield: | |
337 | printk(KERN_WARNING "Bitfield array type is not supported.\n"); | |
338 | return -EINVAL; | |
339 | case atype_sequence_bitfield: | |
340 | printk(KERN_WARNING "Bitfield sequence type is not supported.\n"); | |
341 | return -EINVAL; | |
342 | case atype_string: | |
343 | ptr->object_type = OBJECT_TYPE_STRING; | |
344 | ctx_field->get_value(ctx_field, lttng_probe_ctx, &v); | |
345 | ptr->ptr = v.str; | |
346 | break; | |
347 | case atype_struct: | |
348 | printk(KERN_WARNING "Structure type cannot be loaded.\n"); | |
349 | return -EINVAL; | |
350 | default: | |
351 | printk(KERN_WARNING "Unknown type: %d", (int) field->type.atype); | |
352 | return -EINVAL; | |
353 | } | |
354 | return 0; | |
355 | } | |
356 | ||
357 | static int dynamic_get_index(struct lttng_probe_ctx *lttng_probe_ctx, | |
358 | struct bytecode_runtime *runtime, | |
359 | uint64_t index, struct estack_entry *stack_top) | |
360 | { | |
361 | int ret; | |
362 | const struct filter_get_index_data *gid; | |
363 | ||
364 | /* | |
365 | * Types nested within variants need to perform dynamic lookup | |
366 | * based on the field descriptions. LTTng-UST does not implement | |
367 | * variants for now. | |
368 | */ | |
369 | if (stack_top->u.ptr.field) | |
370 | return -EINVAL; | |
371 | gid = (const struct filter_get_index_data *) &runtime->data[index]; | |
372 | switch (stack_top->u.ptr.type) { | |
373 | case LOAD_OBJECT: | |
374 | switch (stack_top->u.ptr.object_type) { | |
375 | case OBJECT_TYPE_ARRAY: | |
376 | { | |
377 | const char *ptr; | |
378 | ||
379 | WARN_ON_ONCE(gid->offset >= gid->array_len); | |
380 | /* Skip count (unsigned long) */ | |
381 | ptr = *(const char **) (stack_top->u.ptr.ptr + sizeof(unsigned long)); | |
382 | ptr = ptr + gid->offset; | |
383 | stack_top->u.ptr.ptr = ptr; | |
384 | stack_top->u.ptr.object_type = gid->elem.type; | |
385 | stack_top->u.ptr.rev_bo = gid->elem.rev_bo; | |
386 | /* field is only used for types nested within variants. */ | |
387 | stack_top->u.ptr.field = NULL; | |
388 | break; | |
389 | } | |
390 | case OBJECT_TYPE_SEQUENCE: | |
391 | { | |
392 | const char *ptr; | |
393 | size_t ptr_seq_len; | |
394 | ||
395 | ptr = *(const char **) (stack_top->u.ptr.ptr + sizeof(unsigned long)); | |
396 | ptr_seq_len = *(unsigned long *) stack_top->u.ptr.ptr; | |
397 | if (gid->offset >= gid->elem.len * ptr_seq_len) { | |
398 | ret = -EINVAL; | |
399 | goto end; | |
400 | } | |
401 | ptr = ptr + gid->offset; | |
402 | stack_top->u.ptr.ptr = ptr; | |
403 | stack_top->u.ptr.object_type = gid->elem.type; | |
404 | stack_top->u.ptr.rev_bo = gid->elem.rev_bo; | |
405 | /* field is only used for types nested within variants. */ | |
406 | stack_top->u.ptr.field = NULL; | |
407 | break; | |
408 | } | |
409 | case OBJECT_TYPE_STRUCT: | |
410 | printk(KERN_WARNING "Nested structures are not supported yet.\n"); | |
411 | ret = -EINVAL; | |
412 | goto end; | |
413 | case OBJECT_TYPE_VARIANT: | |
414 | default: | |
415 | printk(KERN_WARNING "Unexpected get index type %d", | |
416 | (int) stack_top->u.ptr.object_type); | |
417 | ret = -EINVAL; | |
418 | goto end; | |
419 | } | |
420 | break; | |
421 | case LOAD_ROOT_CONTEXT: | |
422 | case LOAD_ROOT_APP_CONTEXT: /* Fall-through */ | |
423 | { | |
424 | ret = context_get_index(lttng_probe_ctx, | |
425 | &stack_top->u.ptr, | |
426 | gid->ctx_index); | |
427 | if (ret) { | |
428 | goto end; | |
429 | } | |
430 | break; | |
431 | } | |
432 | case LOAD_ROOT_PAYLOAD: | |
433 | stack_top->u.ptr.ptr += gid->offset; | |
434 | if (gid->elem.type == OBJECT_TYPE_STRING) | |
435 | stack_top->u.ptr.ptr = *(const char * const *) stack_top->u.ptr.ptr; | |
436 | stack_top->u.ptr.object_type = gid->elem.type; | |
437 | stack_top->u.ptr.type = LOAD_OBJECT; | |
438 | /* field is only used for types nested within variants. */ | |
439 | stack_top->u.ptr.field = NULL; | |
440 | break; | |
441 | } | |
442 | return 0; | |
443 | ||
444 | end: | |
445 | return ret; | |
446 | } | |
447 | ||
448 | static int dynamic_load_field(struct estack_entry *stack_top) | |
449 | { | |
450 | int ret; | |
451 | ||
452 | switch (stack_top->u.ptr.type) { | |
453 | case LOAD_OBJECT: | |
454 | break; | |
455 | case LOAD_ROOT_CONTEXT: | |
456 | case LOAD_ROOT_APP_CONTEXT: | |
457 | case LOAD_ROOT_PAYLOAD: | |
458 | default: | |
459 | dbg_printk("Filter warning: cannot load root, missing field name.\n"); | |
460 | ret = -EINVAL; | |
461 | goto end; | |
462 | } | |
463 | switch (stack_top->u.ptr.object_type) { | |
464 | case OBJECT_TYPE_S8: | |
465 | dbg_printk("op load field s8\n"); | |
466 | stack_top->u.v = *(int8_t *) stack_top->u.ptr.ptr; | |
467 | break; | |
468 | case OBJECT_TYPE_S16: | |
469 | { | |
470 | int16_t tmp; | |
471 | ||
472 | dbg_printk("op load field s16\n"); | |
473 | tmp = *(int16_t *) stack_top->u.ptr.ptr; | |
474 | if (stack_top->u.ptr.rev_bo) | |
475 | __swab16s(&tmp); | |
476 | stack_top->u.v = tmp; | |
477 | break; | |
478 | } | |
479 | case OBJECT_TYPE_S32: | |
480 | { | |
481 | int32_t tmp; | |
482 | ||
483 | dbg_printk("op load field s32\n"); | |
484 | tmp = *(int32_t *) stack_top->u.ptr.ptr; | |
485 | if (stack_top->u.ptr.rev_bo) | |
486 | __swab32s(&tmp); | |
487 | stack_top->u.v = tmp; | |
488 | break; | |
489 | } | |
490 | case OBJECT_TYPE_S64: | |
491 | { | |
492 | int64_t tmp; | |
493 | ||
494 | dbg_printk("op load field s64\n"); | |
495 | tmp = *(int64_t *) stack_top->u.ptr.ptr; | |
496 | if (stack_top->u.ptr.rev_bo) | |
497 | __swab64s(&tmp); | |
498 | stack_top->u.v = tmp; | |
499 | break; | |
500 | } | |
501 | case OBJECT_TYPE_U8: | |
502 | dbg_printk("op load field u8\n"); | |
503 | stack_top->u.v = *(uint8_t *) stack_top->u.ptr.ptr; | |
504 | break; | |
505 | case OBJECT_TYPE_U16: | |
506 | { | |
507 | uint16_t tmp; | |
508 | ||
509 | dbg_printk("op load field s16\n"); | |
510 | tmp = *(uint16_t *) stack_top->u.ptr.ptr; | |
511 | if (stack_top->u.ptr.rev_bo) | |
512 | __swab16s(&tmp); | |
513 | stack_top->u.v = tmp; | |
514 | break; | |
515 | } | |
516 | case OBJECT_TYPE_U32: | |
517 | { | |
518 | uint32_t tmp; | |
519 | ||
520 | dbg_printk("op load field u32\n"); | |
521 | tmp = *(uint32_t *) stack_top->u.ptr.ptr; | |
522 | if (stack_top->u.ptr.rev_bo) | |
523 | __swab32s(&tmp); | |
524 | stack_top->u.v = tmp; | |
525 | break; | |
526 | } | |
527 | case OBJECT_TYPE_U64: | |
528 | { | |
529 | uint64_t tmp; | |
530 | ||
531 | dbg_printk("op load field u64\n"); | |
532 | tmp = *(uint64_t *) stack_top->u.ptr.ptr; | |
533 | if (stack_top->u.ptr.rev_bo) | |
534 | __swab64s(&tmp); | |
535 | stack_top->u.v = tmp; | |
536 | break; | |
537 | } | |
538 | case OBJECT_TYPE_STRING: | |
539 | { | |
540 | const char *str; | |
541 | ||
542 | dbg_printk("op load field string\n"); | |
543 | str = (const char *) stack_top->u.ptr.ptr; | |
544 | stack_top->u.s.str = str; | |
545 | if (unlikely(!stack_top->u.s.str)) { | |
546 | dbg_printk("Filter warning: loading a NULL string.\n"); | |
547 | ret = -EINVAL; | |
548 | goto end; | |
549 | } | |
4efe037b | 550 | stack_top->u.s.seq_len = LTTNG_SIZE_MAX; |
3834b99f MD |
551 | stack_top->u.s.literal_type = |
552 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
553 | break; | |
554 | } | |
555 | case OBJECT_TYPE_STRING_SEQUENCE: | |
556 | { | |
557 | const char *ptr; | |
558 | ||
559 | dbg_printk("op load field string sequence\n"); | |
560 | ptr = stack_top->u.ptr.ptr; | |
561 | stack_top->u.s.seq_len = *(unsigned long *) ptr; | |
562 | stack_top->u.s.str = *(const char **) (ptr + sizeof(unsigned long)); | |
563 | if (unlikely(!stack_top->u.s.str)) { | |
564 | dbg_printk("Filter warning: loading a NULL sequence.\n"); | |
565 | ret = -EINVAL; | |
566 | goto end; | |
567 | } | |
568 | stack_top->u.s.literal_type = | |
569 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
570 | break; | |
571 | } | |
572 | case OBJECT_TYPE_DYNAMIC: | |
573 | /* | |
574 | * Dynamic types in context are looked up | |
575 | * by context get index. | |
576 | */ | |
577 | ret = -EINVAL; | |
578 | goto end; | |
579 | case OBJECT_TYPE_DOUBLE: | |
580 | ret = -EINVAL; | |
581 | goto end; | |
582 | case OBJECT_TYPE_SEQUENCE: | |
583 | case OBJECT_TYPE_ARRAY: | |
584 | case OBJECT_TYPE_STRUCT: | |
585 | case OBJECT_TYPE_VARIANT: | |
586 | printk(KERN_WARNING "Sequences, arrays, struct and variant cannot be loaded (nested types).\n"); | |
587 | ret = -EINVAL; | |
588 | goto end; | |
589 | } | |
590 | return 0; | |
591 | ||
592 | end: | |
593 | return ret; | |
594 | } | |
595 | ||
2fb96b52 JG |
596 | #ifdef DEBUG |
597 | ||
598 | #define DBG_USER_STR_CUTOFF 32 | |
599 | ||
600 | /* | |
601 | * In debug mode, print user string (truncated, if necessary). | |
602 | */ | |
603 | static inline | |
604 | void dbg_load_ref_user_str_printk(const struct estack_entry *user_str_reg) | |
605 | { | |
606 | size_t pos = 0; | |
607 | char last_char; | |
608 | char user_str[DBG_USER_STR_CUTOFF]; | |
609 | ||
610 | pagefault_disable(); | |
611 | do { | |
612 | last_char = get_char(user_str_reg, pos); | |
613 | user_str[pos] = last_char; | |
614 | pos++; | |
615 | } while (last_char != '\0' && pos < sizeof(user_str)); | |
616 | pagefault_enable(); | |
617 | ||
618 | user_str[sizeof(user_str) - 1] = '\0'; | |
619 | dbg_printk("load field ref user string: '%s%s'\n", user_str, | |
620 | last_char != '\0' ? "[...]" : ""); | |
621 | } | |
622 | #else | |
623 | static inline | |
624 | void dbg_load_ref_user_str_printk(const struct estack_entry *user_str_reg) | |
625 | { | |
626 | } | |
627 | #endif | |
628 | ||
07dfc1d0 MD |
629 | /* |
630 | * Return 0 (discard), or raise the 0x1 flag (log event). | |
631 | * Currently, other flags are kept for future extensions and have no | |
632 | * effect. | |
633 | */ | |
634 | uint64_t lttng_filter_interpret_bytecode(void *filter_data, | |
79150a49 | 635 | struct lttng_probe_ctx *lttng_probe_ctx, |
07dfc1d0 MD |
636 | const char *filter_stack_data) |
637 | { | |
638 | struct bytecode_runtime *bytecode = filter_data; | |
639 | void *pc, *next_pc, *start_pc; | |
640 | int ret = -EINVAL; | |
641 | uint64_t retval = 0; | |
642 | struct estack _stack; | |
643 | struct estack *stack = &_stack; | |
644 | register int64_t ax = 0, bx = 0; | |
645 | register int top = FILTER_STACK_EMPTY; | |
646 | #ifndef INTERPRETER_USE_SWITCH | |
647 | static void *dispatch[NR_FILTER_OPS] = { | |
648 | [ FILTER_OP_UNKNOWN ] = &&LABEL_FILTER_OP_UNKNOWN, | |
649 | ||
650 | [ FILTER_OP_RETURN ] = &&LABEL_FILTER_OP_RETURN, | |
651 | ||
652 | /* binary */ | |
653 | [ FILTER_OP_MUL ] = &&LABEL_FILTER_OP_MUL, | |
654 | [ FILTER_OP_DIV ] = &&LABEL_FILTER_OP_DIV, | |
655 | [ FILTER_OP_MOD ] = &&LABEL_FILTER_OP_MOD, | |
656 | [ FILTER_OP_PLUS ] = &&LABEL_FILTER_OP_PLUS, | |
657 | [ FILTER_OP_MINUS ] = &&LABEL_FILTER_OP_MINUS, | |
e16c054b MD |
658 | [ FILTER_OP_BIT_RSHIFT ] = &&LABEL_FILTER_OP_BIT_RSHIFT, |
659 | [ FILTER_OP_BIT_LSHIFT ] = &&LABEL_FILTER_OP_BIT_LSHIFT, | |
3834b99f MD |
660 | [ FILTER_OP_BIT_AND ] = &&LABEL_FILTER_OP_BIT_AND, |
661 | [ FILTER_OP_BIT_OR ] = &&LABEL_FILTER_OP_BIT_OR, | |
662 | [ FILTER_OP_BIT_XOR ] = &&LABEL_FILTER_OP_BIT_XOR, | |
07dfc1d0 MD |
663 | |
664 | /* binary comparators */ | |
665 | [ FILTER_OP_EQ ] = &&LABEL_FILTER_OP_EQ, | |
666 | [ FILTER_OP_NE ] = &&LABEL_FILTER_OP_NE, | |
667 | [ FILTER_OP_GT ] = &&LABEL_FILTER_OP_GT, | |
668 | [ FILTER_OP_LT ] = &&LABEL_FILTER_OP_LT, | |
669 | [ FILTER_OP_GE ] = &&LABEL_FILTER_OP_GE, | |
670 | [ FILTER_OP_LE ] = &&LABEL_FILTER_OP_LE, | |
671 | ||
672 | /* string binary comparator */ | |
673 | [ FILTER_OP_EQ_STRING ] = &&LABEL_FILTER_OP_EQ_STRING, | |
674 | [ FILTER_OP_NE_STRING ] = &&LABEL_FILTER_OP_NE_STRING, | |
675 | [ FILTER_OP_GT_STRING ] = &&LABEL_FILTER_OP_GT_STRING, | |
676 | [ FILTER_OP_LT_STRING ] = &&LABEL_FILTER_OP_LT_STRING, | |
677 | [ FILTER_OP_GE_STRING ] = &&LABEL_FILTER_OP_GE_STRING, | |
678 | [ FILTER_OP_LE_STRING ] = &&LABEL_FILTER_OP_LE_STRING, | |
679 | ||
02aca193 PP |
680 | /* globbing pattern binary comparator */ |
681 | [ FILTER_OP_EQ_STAR_GLOB_STRING ] = &&LABEL_FILTER_OP_EQ_STAR_GLOB_STRING, | |
682 | [ FILTER_OP_NE_STAR_GLOB_STRING ] = &&LABEL_FILTER_OP_NE_STAR_GLOB_STRING, | |
683 | ||
07dfc1d0 MD |
684 | /* s64 binary comparator */ |
685 | [ FILTER_OP_EQ_S64 ] = &&LABEL_FILTER_OP_EQ_S64, | |
686 | [ FILTER_OP_NE_S64 ] = &&LABEL_FILTER_OP_NE_S64, | |
687 | [ FILTER_OP_GT_S64 ] = &&LABEL_FILTER_OP_GT_S64, | |
688 | [ FILTER_OP_LT_S64 ] = &&LABEL_FILTER_OP_LT_S64, | |
689 | [ FILTER_OP_GE_S64 ] = &&LABEL_FILTER_OP_GE_S64, | |
690 | [ FILTER_OP_LE_S64 ] = &&LABEL_FILTER_OP_LE_S64, | |
691 | ||
692 | /* double binary comparator */ | |
693 | [ FILTER_OP_EQ_DOUBLE ] = &&LABEL_FILTER_OP_EQ_DOUBLE, | |
694 | [ FILTER_OP_NE_DOUBLE ] = &&LABEL_FILTER_OP_NE_DOUBLE, | |
695 | [ FILTER_OP_GT_DOUBLE ] = &&LABEL_FILTER_OP_GT_DOUBLE, | |
696 | [ FILTER_OP_LT_DOUBLE ] = &&LABEL_FILTER_OP_LT_DOUBLE, | |
697 | [ FILTER_OP_GE_DOUBLE ] = &&LABEL_FILTER_OP_GE_DOUBLE, | |
698 | [ FILTER_OP_LE_DOUBLE ] = &&LABEL_FILTER_OP_LE_DOUBLE, | |
699 | ||
700 | /* Mixed S64-double binary comparators */ | |
701 | [ FILTER_OP_EQ_DOUBLE_S64 ] = &&LABEL_FILTER_OP_EQ_DOUBLE_S64, | |
702 | [ FILTER_OP_NE_DOUBLE_S64 ] = &&LABEL_FILTER_OP_NE_DOUBLE_S64, | |
703 | [ FILTER_OP_GT_DOUBLE_S64 ] = &&LABEL_FILTER_OP_GT_DOUBLE_S64, | |
704 | [ FILTER_OP_LT_DOUBLE_S64 ] = &&LABEL_FILTER_OP_LT_DOUBLE_S64, | |
705 | [ FILTER_OP_GE_DOUBLE_S64 ] = &&LABEL_FILTER_OP_GE_DOUBLE_S64, | |
706 | [ FILTER_OP_LE_DOUBLE_S64 ] = &&LABEL_FILTER_OP_LE_DOUBLE_S64, | |
707 | ||
708 | [ FILTER_OP_EQ_S64_DOUBLE ] = &&LABEL_FILTER_OP_EQ_S64_DOUBLE, | |
709 | [ FILTER_OP_NE_S64_DOUBLE ] = &&LABEL_FILTER_OP_NE_S64_DOUBLE, | |
710 | [ FILTER_OP_GT_S64_DOUBLE ] = &&LABEL_FILTER_OP_GT_S64_DOUBLE, | |
711 | [ FILTER_OP_LT_S64_DOUBLE ] = &&LABEL_FILTER_OP_LT_S64_DOUBLE, | |
712 | [ FILTER_OP_GE_S64_DOUBLE ] = &&LABEL_FILTER_OP_GE_S64_DOUBLE, | |
713 | [ FILTER_OP_LE_S64_DOUBLE ] = &&LABEL_FILTER_OP_LE_S64_DOUBLE, | |
714 | ||
715 | /* unary */ | |
716 | [ FILTER_OP_UNARY_PLUS ] = &&LABEL_FILTER_OP_UNARY_PLUS, | |
717 | [ FILTER_OP_UNARY_MINUS ] = &&LABEL_FILTER_OP_UNARY_MINUS, | |
718 | [ FILTER_OP_UNARY_NOT ] = &&LABEL_FILTER_OP_UNARY_NOT, | |
719 | [ FILTER_OP_UNARY_PLUS_S64 ] = &&LABEL_FILTER_OP_UNARY_PLUS_S64, | |
720 | [ FILTER_OP_UNARY_MINUS_S64 ] = &&LABEL_FILTER_OP_UNARY_MINUS_S64, | |
721 | [ FILTER_OP_UNARY_NOT_S64 ] = &&LABEL_FILTER_OP_UNARY_NOT_S64, | |
722 | [ FILTER_OP_UNARY_PLUS_DOUBLE ] = &&LABEL_FILTER_OP_UNARY_PLUS_DOUBLE, | |
723 | [ FILTER_OP_UNARY_MINUS_DOUBLE ] = &&LABEL_FILTER_OP_UNARY_MINUS_DOUBLE, | |
724 | [ FILTER_OP_UNARY_NOT_DOUBLE ] = &&LABEL_FILTER_OP_UNARY_NOT_DOUBLE, | |
725 | ||
726 | /* logical */ | |
727 | [ FILTER_OP_AND ] = &&LABEL_FILTER_OP_AND, | |
728 | [ FILTER_OP_OR ] = &&LABEL_FILTER_OP_OR, | |
729 | ||
730 | /* load field ref */ | |
731 | [ FILTER_OP_LOAD_FIELD_REF ] = &&LABEL_FILTER_OP_LOAD_FIELD_REF, | |
732 | [ FILTER_OP_LOAD_FIELD_REF_STRING ] = &&LABEL_FILTER_OP_LOAD_FIELD_REF_STRING, | |
733 | [ FILTER_OP_LOAD_FIELD_REF_SEQUENCE ] = &&LABEL_FILTER_OP_LOAD_FIELD_REF_SEQUENCE, | |
734 | [ FILTER_OP_LOAD_FIELD_REF_S64 ] = &&LABEL_FILTER_OP_LOAD_FIELD_REF_S64, | |
735 | [ FILTER_OP_LOAD_FIELD_REF_DOUBLE ] = &&LABEL_FILTER_OP_LOAD_FIELD_REF_DOUBLE, | |
736 | ||
737 | /* load from immediate operand */ | |
738 | [ FILTER_OP_LOAD_STRING ] = &&LABEL_FILTER_OP_LOAD_STRING, | |
02aca193 | 739 | [ FILTER_OP_LOAD_STAR_GLOB_STRING ] = &&LABEL_FILTER_OP_LOAD_STAR_GLOB_STRING, |
07dfc1d0 MD |
740 | [ FILTER_OP_LOAD_S64 ] = &&LABEL_FILTER_OP_LOAD_S64, |
741 | [ FILTER_OP_LOAD_DOUBLE ] = &&LABEL_FILTER_OP_LOAD_DOUBLE, | |
742 | ||
743 | /* cast */ | |
744 | [ FILTER_OP_CAST_TO_S64 ] = &&LABEL_FILTER_OP_CAST_TO_S64, | |
745 | [ FILTER_OP_CAST_DOUBLE_TO_S64 ] = &&LABEL_FILTER_OP_CAST_DOUBLE_TO_S64, | |
746 | [ FILTER_OP_CAST_NOP ] = &&LABEL_FILTER_OP_CAST_NOP, | |
747 | ||
748 | /* get context ref */ | |
749 | [ FILTER_OP_GET_CONTEXT_REF ] = &&LABEL_FILTER_OP_GET_CONTEXT_REF, | |
750 | [ FILTER_OP_GET_CONTEXT_REF_STRING ] = &&LABEL_FILTER_OP_GET_CONTEXT_REF_STRING, | |
751 | [ FILTER_OP_GET_CONTEXT_REF_S64 ] = &&LABEL_FILTER_OP_GET_CONTEXT_REF_S64, | |
752 | [ FILTER_OP_GET_CONTEXT_REF_DOUBLE ] = &&LABEL_FILTER_OP_GET_CONTEXT_REF_DOUBLE, | |
f127e61e MD |
753 | |
754 | /* load userspace field ref */ | |
755 | [ FILTER_OP_LOAD_FIELD_REF_USER_STRING ] = &&LABEL_FILTER_OP_LOAD_FIELD_REF_USER_STRING, | |
756 | [ FILTER_OP_LOAD_FIELD_REF_USER_SEQUENCE ] = &&LABEL_FILTER_OP_LOAD_FIELD_REF_USER_SEQUENCE, | |
3834b99f MD |
757 | |
758 | /* Instructions for recursive traversal through composed types. */ | |
759 | [ FILTER_OP_GET_CONTEXT_ROOT ] = &&LABEL_FILTER_OP_GET_CONTEXT_ROOT, | |
760 | [ FILTER_OP_GET_APP_CONTEXT_ROOT ] = &&LABEL_FILTER_OP_GET_APP_CONTEXT_ROOT, | |
761 | [ FILTER_OP_GET_PAYLOAD_ROOT ] = &&LABEL_FILTER_OP_GET_PAYLOAD_ROOT, | |
762 | ||
763 | [ FILTER_OP_GET_SYMBOL ] = &&LABEL_FILTER_OP_GET_SYMBOL, | |
764 | [ FILTER_OP_GET_SYMBOL_FIELD ] = &&LABEL_FILTER_OP_GET_SYMBOL_FIELD, | |
765 | [ FILTER_OP_GET_INDEX_U16 ] = &&LABEL_FILTER_OP_GET_INDEX_U16, | |
766 | [ FILTER_OP_GET_INDEX_U64 ] = &&LABEL_FILTER_OP_GET_INDEX_U64, | |
767 | ||
768 | [ FILTER_OP_LOAD_FIELD ] = &&LABEL_FILTER_OP_LOAD_FIELD, | |
769 | [ FILTER_OP_LOAD_FIELD_S8 ] = &&LABEL_FILTER_OP_LOAD_FIELD_S8, | |
770 | [ FILTER_OP_LOAD_FIELD_S16 ] = &&LABEL_FILTER_OP_LOAD_FIELD_S16, | |
771 | [ FILTER_OP_LOAD_FIELD_S32 ] = &&LABEL_FILTER_OP_LOAD_FIELD_S32, | |
772 | [ FILTER_OP_LOAD_FIELD_S64 ] = &&LABEL_FILTER_OP_LOAD_FIELD_S64, | |
773 | [ FILTER_OP_LOAD_FIELD_U8 ] = &&LABEL_FILTER_OP_LOAD_FIELD_U8, | |
774 | [ FILTER_OP_LOAD_FIELD_U16 ] = &&LABEL_FILTER_OP_LOAD_FIELD_U16, | |
775 | [ FILTER_OP_LOAD_FIELD_U32 ] = &&LABEL_FILTER_OP_LOAD_FIELD_U32, | |
776 | [ FILTER_OP_LOAD_FIELD_U64 ] = &&LABEL_FILTER_OP_LOAD_FIELD_U64, | |
777 | [ FILTER_OP_LOAD_FIELD_STRING ] = &&LABEL_FILTER_OP_LOAD_FIELD_STRING, | |
778 | [ FILTER_OP_LOAD_FIELD_SEQUENCE ] = &&LABEL_FILTER_OP_LOAD_FIELD_SEQUENCE, | |
779 | [ FILTER_OP_LOAD_FIELD_DOUBLE ] = &&LABEL_FILTER_OP_LOAD_FIELD_DOUBLE, | |
e16c054b MD |
780 | |
781 | [ FILTER_OP_UNARY_BIT_NOT ] = &&LABEL_FILTER_OP_UNARY_BIT_NOT, | |
57ba4b41 MD |
782 | |
783 | [ FILTER_OP_RETURN_S64 ] = &&LABEL_FILTER_OP_RETURN_S64, | |
07dfc1d0 MD |
784 | }; |
785 | #endif /* #ifndef INTERPRETER_USE_SWITCH */ | |
786 | ||
787 | START_OP | |
788 | ||
789 | OP(FILTER_OP_UNKNOWN): | |
790 | OP(FILTER_OP_LOAD_FIELD_REF): | |
791 | OP(FILTER_OP_GET_CONTEXT_REF): | |
792 | #ifdef INTERPRETER_USE_SWITCH | |
793 | default: | |
794 | #endif /* INTERPRETER_USE_SWITCH */ | |
795 | printk(KERN_WARNING "unknown bytecode op %u\n", | |
796 | (unsigned int) *(filter_opcode_t *) pc); | |
797 | ret = -EINVAL; | |
798 | goto end; | |
799 | ||
800 | OP(FILTER_OP_RETURN): | |
57ba4b41 | 801 | OP(FILTER_OP_RETURN_S64): |
07dfc1d0 MD |
802 | /* LTTNG_FILTER_DISCARD or LTTNG_FILTER_RECORD_FLAG */ |
803 | retval = !!estack_ax_v; | |
804 | ret = 0; | |
805 | goto end; | |
806 | ||
807 | /* binary */ | |
808 | OP(FILTER_OP_MUL): | |
809 | OP(FILTER_OP_DIV): | |
810 | OP(FILTER_OP_MOD): | |
811 | OP(FILTER_OP_PLUS): | |
812 | OP(FILTER_OP_MINUS): | |
07dfc1d0 MD |
813 | printk(KERN_WARNING "unsupported bytecode op %u\n", |
814 | (unsigned int) *(filter_opcode_t *) pc); | |
815 | ret = -EINVAL; | |
816 | goto end; | |
817 | ||
818 | OP(FILTER_OP_EQ): | |
819 | OP(FILTER_OP_NE): | |
820 | OP(FILTER_OP_GT): | |
821 | OP(FILTER_OP_LT): | |
822 | OP(FILTER_OP_GE): | |
823 | OP(FILTER_OP_LE): | |
824 | printk(KERN_WARNING "unsupported non-specialized bytecode op %u\n", | |
825 | (unsigned int) *(filter_opcode_t *) pc); | |
826 | ret = -EINVAL; | |
827 | goto end; | |
828 | ||
829 | OP(FILTER_OP_EQ_STRING): | |
830 | { | |
831 | int res; | |
832 | ||
833 | res = (stack_strcmp(stack, top, "==") == 0); | |
834 | estack_pop(stack, top, ax, bx); | |
835 | estack_ax_v = res; | |
836 | next_pc += sizeof(struct binary_op); | |
837 | PO; | |
838 | } | |
839 | OP(FILTER_OP_NE_STRING): | |
840 | { | |
841 | int res; | |
842 | ||
843 | res = (stack_strcmp(stack, top, "!=") != 0); | |
844 | estack_pop(stack, top, ax, bx); | |
845 | estack_ax_v = res; | |
846 | next_pc += sizeof(struct binary_op); | |
847 | PO; | |
848 | } | |
849 | OP(FILTER_OP_GT_STRING): | |
850 | { | |
851 | int res; | |
852 | ||
853 | res = (stack_strcmp(stack, top, ">") > 0); | |
854 | estack_pop(stack, top, ax, bx); | |
855 | estack_ax_v = res; | |
856 | next_pc += sizeof(struct binary_op); | |
857 | PO; | |
858 | } | |
859 | OP(FILTER_OP_LT_STRING): | |
860 | { | |
861 | int res; | |
862 | ||
863 | res = (stack_strcmp(stack, top, "<") < 0); | |
864 | estack_pop(stack, top, ax, bx); | |
865 | estack_ax_v = res; | |
866 | next_pc += sizeof(struct binary_op); | |
867 | PO; | |
868 | } | |
869 | OP(FILTER_OP_GE_STRING): | |
870 | { | |
871 | int res; | |
872 | ||
873 | res = (stack_strcmp(stack, top, ">=") >= 0); | |
874 | estack_pop(stack, top, ax, bx); | |
875 | estack_ax_v = res; | |
876 | next_pc += sizeof(struct binary_op); | |
877 | PO; | |
878 | } | |
879 | OP(FILTER_OP_LE_STRING): | |
880 | { | |
881 | int res; | |
882 | ||
883 | res = (stack_strcmp(stack, top, "<=") <= 0); | |
884 | estack_pop(stack, top, ax, bx); | |
885 | estack_ax_v = res; | |
886 | next_pc += sizeof(struct binary_op); | |
887 | PO; | |
888 | } | |
889 | ||
02aca193 PP |
890 | OP(FILTER_OP_EQ_STAR_GLOB_STRING): |
891 | { | |
892 | int res; | |
893 | ||
894 | res = (stack_star_glob_match(stack, top, "==") == 0); | |
895 | estack_pop(stack, top, ax, bx); | |
896 | estack_ax_v = res; | |
897 | next_pc += sizeof(struct binary_op); | |
898 | PO; | |
899 | } | |
900 | OP(FILTER_OP_NE_STAR_GLOB_STRING): | |
901 | { | |
902 | int res; | |
903 | ||
904 | res = (stack_star_glob_match(stack, top, "!=") != 0); | |
905 | estack_pop(stack, top, ax, bx); | |
906 | estack_ax_v = res; | |
907 | next_pc += sizeof(struct binary_op); | |
908 | PO; | |
909 | } | |
910 | ||
07dfc1d0 MD |
911 | OP(FILTER_OP_EQ_S64): |
912 | { | |
913 | int res; | |
914 | ||
915 | res = (estack_bx_v == estack_ax_v); | |
916 | estack_pop(stack, top, ax, bx); | |
917 | estack_ax_v = res; | |
918 | next_pc += sizeof(struct binary_op); | |
919 | PO; | |
920 | } | |
921 | OP(FILTER_OP_NE_S64): | |
922 | { | |
923 | int res; | |
924 | ||
925 | res = (estack_bx_v != estack_ax_v); | |
926 | estack_pop(stack, top, ax, bx); | |
927 | estack_ax_v = res; | |
928 | next_pc += sizeof(struct binary_op); | |
929 | PO; | |
930 | } | |
931 | OP(FILTER_OP_GT_S64): | |
932 | { | |
933 | int res; | |
934 | ||
935 | res = (estack_bx_v > estack_ax_v); | |
936 | estack_pop(stack, top, ax, bx); | |
937 | estack_ax_v = res; | |
938 | next_pc += sizeof(struct binary_op); | |
939 | PO; | |
940 | } | |
941 | OP(FILTER_OP_LT_S64): | |
942 | { | |
943 | int res; | |
944 | ||
945 | res = (estack_bx_v < estack_ax_v); | |
946 | estack_pop(stack, top, ax, bx); | |
947 | estack_ax_v = res; | |
948 | next_pc += sizeof(struct binary_op); | |
949 | PO; | |
950 | } | |
951 | OP(FILTER_OP_GE_S64): | |
952 | { | |
953 | int res; | |
954 | ||
955 | res = (estack_bx_v >= estack_ax_v); | |
956 | estack_pop(stack, top, ax, bx); | |
957 | estack_ax_v = res; | |
958 | next_pc += sizeof(struct binary_op); | |
959 | PO; | |
960 | } | |
961 | OP(FILTER_OP_LE_S64): | |
962 | { | |
963 | int res; | |
964 | ||
965 | res = (estack_bx_v <= estack_ax_v); | |
966 | estack_pop(stack, top, ax, bx); | |
967 | estack_ax_v = res; | |
968 | next_pc += sizeof(struct binary_op); | |
969 | PO; | |
970 | } | |
971 | ||
972 | OP(FILTER_OP_EQ_DOUBLE): | |
973 | OP(FILTER_OP_NE_DOUBLE): | |
974 | OP(FILTER_OP_GT_DOUBLE): | |
975 | OP(FILTER_OP_LT_DOUBLE): | |
976 | OP(FILTER_OP_GE_DOUBLE): | |
977 | OP(FILTER_OP_LE_DOUBLE): | |
978 | { | |
979 | BUG_ON(1); | |
980 | PO; | |
981 | } | |
982 | ||
983 | /* Mixed S64-double binary comparators */ | |
984 | OP(FILTER_OP_EQ_DOUBLE_S64): | |
985 | OP(FILTER_OP_NE_DOUBLE_S64): | |
986 | OP(FILTER_OP_GT_DOUBLE_S64): | |
987 | OP(FILTER_OP_LT_DOUBLE_S64): | |
988 | OP(FILTER_OP_GE_DOUBLE_S64): | |
989 | OP(FILTER_OP_LE_DOUBLE_S64): | |
990 | OP(FILTER_OP_EQ_S64_DOUBLE): | |
991 | OP(FILTER_OP_NE_S64_DOUBLE): | |
992 | OP(FILTER_OP_GT_S64_DOUBLE): | |
993 | OP(FILTER_OP_LT_S64_DOUBLE): | |
994 | OP(FILTER_OP_GE_S64_DOUBLE): | |
995 | OP(FILTER_OP_LE_S64_DOUBLE): | |
996 | { | |
997 | BUG_ON(1); | |
998 | PO; | |
999 | } | |
e16c054b MD |
1000 | OP(FILTER_OP_BIT_RSHIFT): |
1001 | { | |
1002 | int64_t res; | |
1003 | ||
ea13ec96 MD |
1004 | /* Catch undefined behavior. */ |
1005 | if (unlikely(estack_ax_v < 0 || estack_ax_v >= 64)) { | |
1006 | ret = -EINVAL; | |
1007 | goto end; | |
1008 | } | |
f8d42740 | 1009 | res = ((uint64_t) estack_bx_v >> (uint32_t) estack_ax_v); |
e16c054b 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_LSHIFT): | |
1016 | { | |
1017 | int64_t res; | |
1018 | ||
ea13ec96 MD |
1019 | /* Catch undefined behavior. */ |
1020 | if (unlikely(estack_ax_v < 0 || estack_ax_v >= 64)) { | |
1021 | ret = -EINVAL; | |
1022 | goto end; | |
1023 | } | |
f8d42740 | 1024 | res = ((uint64_t) estack_bx_v << (uint32_t) estack_ax_v); |
e16c054b MD |
1025 | estack_pop(stack, top, ax, bx); |
1026 | estack_ax_v = res; | |
1027 | next_pc += sizeof(struct binary_op); | |
1028 | PO; | |
1029 | } | |
3834b99f MD |
1030 | OP(FILTER_OP_BIT_AND): |
1031 | { | |
1032 | int64_t res; | |
1033 | ||
f8d42740 | 1034 | res = ((uint64_t) estack_bx_v & (uint64_t) estack_ax_v); |
3834b99f MD |
1035 | estack_pop(stack, top, ax, bx); |
1036 | estack_ax_v = res; | |
1037 | next_pc += sizeof(struct binary_op); | |
1038 | PO; | |
1039 | } | |
1040 | OP(FILTER_OP_BIT_OR): | |
1041 | { | |
1042 | int64_t res; | |
1043 | ||
f8d42740 | 1044 | res = ((uint64_t) estack_bx_v | (uint64_t) estack_ax_v); |
3834b99f MD |
1045 | estack_pop(stack, top, ax, bx); |
1046 | estack_ax_v = res; | |
1047 | next_pc += sizeof(struct binary_op); | |
1048 | PO; | |
1049 | } | |
1050 | OP(FILTER_OP_BIT_XOR): | |
1051 | { | |
1052 | int64_t res; | |
1053 | ||
f8d42740 | 1054 | res = ((uint64_t) estack_bx_v ^ (uint64_t) estack_ax_v); |
3834b99f MD |
1055 | estack_pop(stack, top, ax, bx); |
1056 | estack_ax_v = res; | |
1057 | next_pc += sizeof(struct binary_op); | |
1058 | PO; | |
1059 | } | |
07dfc1d0 MD |
1060 | |
1061 | /* unary */ | |
1062 | OP(FILTER_OP_UNARY_PLUS): | |
1063 | OP(FILTER_OP_UNARY_MINUS): | |
1064 | OP(FILTER_OP_UNARY_NOT): | |
1065 | printk(KERN_WARNING "unsupported non-specialized bytecode op %u\n", | |
1066 | (unsigned int) *(filter_opcode_t *) pc); | |
1067 | ret = -EINVAL; | |
1068 | goto end; | |
1069 | ||
1070 | ||
e16c054b MD |
1071 | OP(FILTER_OP_UNARY_BIT_NOT): |
1072 | { | |
f8d42740 | 1073 | estack_ax_v = ~(uint64_t) estack_ax_v; |
e16c054b MD |
1074 | next_pc += sizeof(struct unary_op); |
1075 | PO; | |
1076 | } | |
1077 | ||
07dfc1d0 MD |
1078 | OP(FILTER_OP_UNARY_PLUS_S64): |
1079 | { | |
1080 | next_pc += sizeof(struct unary_op); | |
1081 | PO; | |
1082 | } | |
1083 | OP(FILTER_OP_UNARY_MINUS_S64): | |
1084 | { | |
1085 | estack_ax_v = -estack_ax_v; | |
1086 | next_pc += sizeof(struct unary_op); | |
1087 | PO; | |
1088 | } | |
1089 | OP(FILTER_OP_UNARY_PLUS_DOUBLE): | |
1090 | OP(FILTER_OP_UNARY_MINUS_DOUBLE): | |
1091 | { | |
1092 | BUG_ON(1); | |
1093 | PO; | |
1094 | } | |
1095 | OP(FILTER_OP_UNARY_NOT_S64): | |
1096 | { | |
1097 | estack_ax_v = !estack_ax_v; | |
1098 | next_pc += sizeof(struct unary_op); | |
1099 | PO; | |
1100 | } | |
1101 | OP(FILTER_OP_UNARY_NOT_DOUBLE): | |
1102 | { | |
1103 | BUG_ON(1); | |
1104 | PO; | |
1105 | } | |
1106 | ||
1107 | /* logical */ | |
1108 | OP(FILTER_OP_AND): | |
1109 | { | |
1110 | struct logical_op *insn = (struct logical_op *) pc; | |
1111 | ||
1112 | /* If AX is 0, skip and evaluate to 0 */ | |
1113 | if (unlikely(estack_ax_v == 0)) { | |
1114 | dbg_printk("Jumping to bytecode offset %u\n", | |
1115 | (unsigned int) insn->skip_offset); | |
1116 | next_pc = start_pc + insn->skip_offset; | |
1117 | } else { | |
1118 | /* Pop 1 when jump not taken */ | |
1119 | estack_pop(stack, top, ax, bx); | |
1120 | next_pc += sizeof(struct logical_op); | |
1121 | } | |
1122 | PO; | |
1123 | } | |
1124 | OP(FILTER_OP_OR): | |
1125 | { | |
1126 | struct logical_op *insn = (struct logical_op *) pc; | |
1127 | ||
1128 | /* If AX is nonzero, skip and evaluate to 1 */ | |
1129 | ||
1130 | if (unlikely(estack_ax_v != 0)) { | |
1131 | estack_ax_v = 1; | |
1132 | dbg_printk("Jumping to bytecode offset %u\n", | |
1133 | (unsigned int) insn->skip_offset); | |
1134 | next_pc = start_pc + insn->skip_offset; | |
1135 | } else { | |
1136 | /* Pop 1 when jump not taken */ | |
1137 | estack_pop(stack, top, ax, bx); | |
1138 | next_pc += sizeof(struct logical_op); | |
1139 | } | |
1140 | PO; | |
1141 | } | |
1142 | ||
1143 | ||
1144 | /* load field ref */ | |
1145 | OP(FILTER_OP_LOAD_FIELD_REF_STRING): | |
1146 | { | |
1147 | struct load_op *insn = (struct load_op *) pc; | |
1148 | struct field_ref *ref = (struct field_ref *) insn->data; | |
1149 | ||
1150 | dbg_printk("load field ref offset %u type string\n", | |
1151 | ref->offset); | |
1152 | estack_push(stack, top, ax, bx); | |
1153 | estack_ax(stack, top)->u.s.str = | |
1154 | *(const char * const *) &filter_stack_data[ref->offset]; | |
1155 | if (unlikely(!estack_ax(stack, top)->u.s.str)) { | |
1156 | dbg_printk("Filter warning: loading a NULL string.\n"); | |
1157 | ret = -EINVAL; | |
1158 | goto end; | |
1159 | } | |
cbc19040 | 1160 | estack_ax(stack, top)->u.s.seq_len = LTTNG_SIZE_MAX; |
02aca193 PP |
1161 | estack_ax(stack, top)->u.s.literal_type = |
1162 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
f127e61e | 1163 | estack_ax(stack, top)->u.s.user = 0; |
07dfc1d0 MD |
1164 | dbg_printk("ref load string %s\n", estack_ax(stack, top)->u.s.str); |
1165 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
1166 | PO; | |
1167 | } | |
1168 | ||
1169 | OP(FILTER_OP_LOAD_FIELD_REF_SEQUENCE): | |
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 sequence\n", | |
1175 | ref->offset); | |
1176 | estack_push(stack, top, ax, bx); | |
1177 | estack_ax(stack, top)->u.s.seq_len = | |
1178 | *(unsigned long *) &filter_stack_data[ref->offset]; | |
1179 | estack_ax(stack, top)->u.s.str = | |
1180 | *(const char **) (&filter_stack_data[ref->offset | |
1181 | + sizeof(unsigned long)]); | |
1182 | if (unlikely(!estack_ax(stack, top)->u.s.str)) { | |
1183 | dbg_printk("Filter warning: loading a NULL sequence.\n"); | |
1184 | ret = -EINVAL; | |
1185 | goto end; | |
1186 | } | |
02aca193 PP |
1187 | estack_ax(stack, top)->u.s.literal_type = |
1188 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
f127e61e | 1189 | estack_ax(stack, top)->u.s.user = 0; |
07dfc1d0 MD |
1190 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); |
1191 | PO; | |
1192 | } | |
1193 | ||
1194 | OP(FILTER_OP_LOAD_FIELD_REF_S64): | |
1195 | { | |
1196 | struct load_op *insn = (struct load_op *) pc; | |
1197 | struct field_ref *ref = (struct field_ref *) insn->data; | |
1198 | ||
1199 | dbg_printk("load field ref offset %u type s64\n", | |
1200 | ref->offset); | |
1201 | estack_push(stack, top, ax, bx); | |
1202 | estack_ax_v = | |
1203 | ((struct literal_numeric *) &filter_stack_data[ref->offset])->v; | |
1204 | dbg_printk("ref load s64 %lld\n", | |
1205 | (long long) estack_ax_v); | |
1206 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
1207 | PO; | |
1208 | } | |
1209 | ||
1210 | OP(FILTER_OP_LOAD_FIELD_REF_DOUBLE): | |
1211 | { | |
1212 | BUG_ON(1); | |
1213 | PO; | |
1214 | } | |
1215 | ||
1216 | /* load from immediate operand */ | |
1217 | OP(FILTER_OP_LOAD_STRING): | |
1218 | { | |
1219 | struct load_op *insn = (struct load_op *) pc; | |
1220 | ||
1221 | dbg_printk("load string %s\n", insn->data); | |
1222 | estack_push(stack, top, ax, bx); | |
1223 | estack_ax(stack, top)->u.s.str = insn->data; | |
cbc19040 | 1224 | estack_ax(stack, top)->u.s.seq_len = LTTNG_SIZE_MAX; |
02aca193 PP |
1225 | estack_ax(stack, top)->u.s.literal_type = |
1226 | ESTACK_STRING_LITERAL_TYPE_PLAIN; | |
1227 | estack_ax(stack, top)->u.s.user = 0; | |
1228 | next_pc += sizeof(struct load_op) + strlen(insn->data) + 1; | |
1229 | PO; | |
1230 | } | |
1231 | ||
1232 | OP(FILTER_OP_LOAD_STAR_GLOB_STRING): | |
1233 | { | |
1234 | struct load_op *insn = (struct load_op *) pc; | |
1235 | ||
1236 | dbg_printk("load globbing pattern %s\n", insn->data); | |
1237 | estack_push(stack, top, ax, bx); | |
1238 | estack_ax(stack, top)->u.s.str = insn->data; | |
cbc19040 | 1239 | estack_ax(stack, top)->u.s.seq_len = LTTNG_SIZE_MAX; |
02aca193 PP |
1240 | estack_ax(stack, top)->u.s.literal_type = |
1241 | ESTACK_STRING_LITERAL_TYPE_STAR_GLOB; | |
f127e61e | 1242 | estack_ax(stack, top)->u.s.user = 0; |
07dfc1d0 MD |
1243 | next_pc += sizeof(struct load_op) + strlen(insn->data) + 1; |
1244 | PO; | |
1245 | } | |
1246 | ||
1247 | OP(FILTER_OP_LOAD_S64): | |
1248 | { | |
1249 | struct load_op *insn = (struct load_op *) pc; | |
1250 | ||
1251 | estack_push(stack, top, ax, bx); | |
1252 | estack_ax_v = ((struct literal_numeric *) insn->data)->v; | |
1253 | dbg_printk("load s64 %lld\n", | |
1254 | (long long) estack_ax_v); | |
1255 | next_pc += sizeof(struct load_op) | |
1256 | + sizeof(struct literal_numeric); | |
1257 | PO; | |
1258 | } | |
1259 | ||
1260 | OP(FILTER_OP_LOAD_DOUBLE): | |
1261 | { | |
1262 | BUG_ON(1); | |
1263 | PO; | |
1264 | } | |
1265 | ||
1266 | /* cast */ | |
1267 | OP(FILTER_OP_CAST_TO_S64): | |
1268 | printk(KERN_WARNING "unsupported non-specialized bytecode op %u\n", | |
1269 | (unsigned int) *(filter_opcode_t *) pc); | |
1270 | ret = -EINVAL; | |
1271 | goto end; | |
1272 | ||
1273 | OP(FILTER_OP_CAST_DOUBLE_TO_S64): | |
1274 | { | |
1275 | BUG_ON(1); | |
1276 | PO; | |
1277 | } | |
1278 | ||
1279 | OP(FILTER_OP_CAST_NOP): | |
1280 | { | |
1281 | next_pc += sizeof(struct cast_op); | |
1282 | PO; | |
1283 | } | |
1284 | ||
1285 | /* get context ref */ | |
1286 | OP(FILTER_OP_GET_CONTEXT_REF_STRING): | |
1287 | { | |
1288 | struct load_op *insn = (struct load_op *) pc; | |
1289 | struct field_ref *ref = (struct field_ref *) insn->data; | |
1290 | struct lttng_ctx_field *ctx_field; | |
1291 | union lttng_ctx_value v; | |
1292 | ||
1293 | dbg_printk("get context ref offset %u type string\n", | |
1294 | ref->offset); | |
1295 | ctx_field = <tng_static_ctx->fields[ref->offset]; | |
79150a49 | 1296 | ctx_field->get_value(ctx_field, lttng_probe_ctx, &v); |
07dfc1d0 MD |
1297 | estack_push(stack, top, ax, bx); |
1298 | estack_ax(stack, top)->u.s.str = v.str; | |
1299 | if (unlikely(!estack_ax(stack, top)->u.s.str)) { | |
1300 | dbg_printk("Filter warning: loading a NULL string.\n"); | |
1301 | ret = -EINVAL; | |
1302 | goto end; | |
1303 | } | |
cbc19040 | 1304 | estack_ax(stack, top)->u.s.seq_len = LTTNG_SIZE_MAX; |
02aca193 PP |
1305 | estack_ax(stack, top)->u.s.literal_type = |
1306 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
f127e61e | 1307 | estack_ax(stack, top)->u.s.user = 0; |
07dfc1d0 MD |
1308 | dbg_printk("ref get context string %s\n", estack_ax(stack, top)->u.s.str); |
1309 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
1310 | PO; | |
1311 | } | |
1312 | ||
1313 | OP(FILTER_OP_GET_CONTEXT_REF_S64): | |
1314 | { | |
1315 | struct load_op *insn = (struct load_op *) pc; | |
1316 | struct field_ref *ref = (struct field_ref *) insn->data; | |
1317 | struct lttng_ctx_field *ctx_field; | |
1318 | union lttng_ctx_value v; | |
1319 | ||
1320 | dbg_printk("get context ref offset %u type s64\n", | |
1321 | ref->offset); | |
1322 | ctx_field = <tng_static_ctx->fields[ref->offset]; | |
79150a49 | 1323 | ctx_field->get_value(ctx_field, lttng_probe_ctx, &v); |
07dfc1d0 MD |
1324 | estack_push(stack, top, ax, bx); |
1325 | estack_ax_v = v.s64; | |
1326 | dbg_printk("ref get context s64 %lld\n", | |
1327 | (long long) estack_ax_v); | |
1328 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
1329 | PO; | |
1330 | } | |
1331 | ||
1332 | OP(FILTER_OP_GET_CONTEXT_REF_DOUBLE): | |
1333 | { | |
1334 | BUG_ON(1); | |
1335 | PO; | |
1336 | } | |
1337 | ||
f127e61e MD |
1338 | /* load userspace field ref */ |
1339 | OP(FILTER_OP_LOAD_FIELD_REF_USER_STRING): | |
1340 | { | |
1341 | struct load_op *insn = (struct load_op *) pc; | |
1342 | struct field_ref *ref = (struct field_ref *) insn->data; | |
1343 | ||
1344 | dbg_printk("load field ref offset %u type user string\n", | |
1345 | ref->offset); | |
1346 | estack_push(stack, top, ax, bx); | |
5b4ad89f | 1347 | estack_ax(stack, top)->u.s.user_str = |
f127e61e | 1348 | *(const char * const *) &filter_stack_data[ref->offset]; |
2fb96b52 | 1349 | if (unlikely(!estack_ax(stack, top)->u.s.user_str)) { |
f127e61e MD |
1350 | dbg_printk("Filter warning: loading a NULL string.\n"); |
1351 | ret = -EINVAL; | |
1352 | goto end; | |
1353 | } | |
cbc19040 | 1354 | estack_ax(stack, top)->u.s.seq_len = LTTNG_SIZE_MAX; |
02aca193 PP |
1355 | estack_ax(stack, top)->u.s.literal_type = |
1356 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
f127e61e | 1357 | estack_ax(stack, top)->u.s.user = 1; |
2fb96b52 | 1358 | dbg_load_ref_user_str_printk(estack_ax(stack, top)); |
f127e61e MD |
1359 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); |
1360 | PO; | |
1361 | } | |
1362 | ||
1363 | OP(FILTER_OP_LOAD_FIELD_REF_USER_SEQUENCE): | |
1364 | { | |
1365 | struct load_op *insn = (struct load_op *) pc; | |
1366 | struct field_ref *ref = (struct field_ref *) insn->data; | |
1367 | ||
1368 | dbg_printk("load field ref offset %u type user sequence\n", | |
1369 | ref->offset); | |
1370 | estack_push(stack, top, ax, bx); | |
1371 | estack_ax(stack, top)->u.s.seq_len = | |
1372 | *(unsigned long *) &filter_stack_data[ref->offset]; | |
5b4ad89f | 1373 | estack_ax(stack, top)->u.s.user_str = |
f127e61e MD |
1374 | *(const char **) (&filter_stack_data[ref->offset |
1375 | + sizeof(unsigned long)]); | |
2fb96b52 | 1376 | if (unlikely(!estack_ax(stack, top)->u.s.user_str)) { |
f127e61e MD |
1377 | dbg_printk("Filter warning: loading a NULL sequence.\n"); |
1378 | ret = -EINVAL; | |
1379 | goto end; | |
1380 | } | |
02aca193 PP |
1381 | estack_ax(stack, top)->u.s.literal_type = |
1382 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
f127e61e MD |
1383 | estack_ax(stack, top)->u.s.user = 1; |
1384 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
1385 | PO; | |
1386 | } | |
1387 | ||
3834b99f MD |
1388 | OP(FILTER_OP_GET_CONTEXT_ROOT): |
1389 | { | |
1390 | dbg_printk("op get context root\n"); | |
1391 | estack_push(stack, top, ax, bx); | |
1392 | estack_ax(stack, top)->u.ptr.type = LOAD_ROOT_CONTEXT; | |
1393 | /* "field" only needed for variants. */ | |
1394 | estack_ax(stack, top)->u.ptr.field = NULL; | |
1395 | next_pc += sizeof(struct load_op); | |
1396 | PO; | |
1397 | } | |
1398 | ||
1399 | OP(FILTER_OP_GET_APP_CONTEXT_ROOT): | |
1400 | { | |
1401 | BUG_ON(1); | |
1402 | PO; | |
1403 | } | |
1404 | ||
1405 | OP(FILTER_OP_GET_PAYLOAD_ROOT): | |
1406 | { | |
1407 | dbg_printk("op get app payload root\n"); | |
1408 | estack_push(stack, top, ax, bx); | |
1409 | estack_ax(stack, top)->u.ptr.type = LOAD_ROOT_PAYLOAD; | |
1410 | estack_ax(stack, top)->u.ptr.ptr = filter_stack_data; | |
1411 | /* "field" only needed for variants. */ | |
1412 | estack_ax(stack, top)->u.ptr.field = NULL; | |
1413 | next_pc += sizeof(struct load_op); | |
1414 | PO; | |
1415 | } | |
1416 | ||
1417 | OP(FILTER_OP_GET_SYMBOL): | |
1418 | { | |
1419 | dbg_printk("op get symbol\n"); | |
1420 | switch (estack_ax(stack, top)->u.ptr.type) { | |
1421 | case LOAD_OBJECT: | |
1422 | printk(KERN_WARNING "Nested fields not implemented yet.\n"); | |
1423 | ret = -EINVAL; | |
1424 | goto end; | |
1425 | case LOAD_ROOT_CONTEXT: | |
1426 | case LOAD_ROOT_APP_CONTEXT: | |
1427 | case LOAD_ROOT_PAYLOAD: | |
1428 | /* | |
1429 | * symbol lookup is performed by | |
1430 | * specialization. | |
1431 | */ | |
1432 | ret = -EINVAL; | |
1433 | goto end; | |
1434 | } | |
1435 | next_pc += sizeof(struct load_op) + sizeof(struct get_symbol); | |
1436 | PO; | |
1437 | } | |
1438 | ||
1439 | OP(FILTER_OP_GET_SYMBOL_FIELD): | |
1440 | { | |
1441 | /* | |
1442 | * Used for first variant encountered in a | |
1443 | * traversal. Variants are not implemented yet. | |
1444 | */ | |
1445 | ret = -EINVAL; | |
1446 | goto end; | |
1447 | } | |
1448 | ||
1449 | OP(FILTER_OP_GET_INDEX_U16): | |
1450 | { | |
1451 | struct load_op *insn = (struct load_op *) pc; | |
1452 | struct get_index_u16 *index = (struct get_index_u16 *) insn->data; | |
1453 | ||
1454 | dbg_printk("op get index u16\n"); | |
1455 | ret = dynamic_get_index(lttng_probe_ctx, bytecode, index->index, 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) + sizeof(struct get_index_u16); | |
1460 | PO; | |
1461 | } | |
1462 | ||
1463 | OP(FILTER_OP_GET_INDEX_U64): | |
1464 | { | |
1465 | struct load_op *insn = (struct load_op *) pc; | |
1466 | struct get_index_u64 *index = (struct get_index_u64 *) insn->data; | |
1467 | ||
1468 | dbg_printk("op get index u64\n"); | |
1469 | ret = dynamic_get_index(lttng_probe_ctx, bytecode, index->index, estack_ax(stack, top)); | |
1470 | if (ret) | |
1471 | goto end; | |
1472 | estack_ax_v = estack_ax(stack, top)->u.v; | |
1473 | next_pc += sizeof(struct load_op) + sizeof(struct get_index_u64); | |
1474 | PO; | |
1475 | } | |
1476 | ||
1477 | OP(FILTER_OP_LOAD_FIELD): | |
1478 | { | |
1479 | dbg_printk("op load field\n"); | |
1480 | ret = dynamic_load_field(estack_ax(stack, top)); | |
1481 | if (ret) | |
1482 | goto end; | |
1483 | estack_ax_v = estack_ax(stack, top)->u.v; | |
1484 | next_pc += sizeof(struct load_op); | |
1485 | PO; | |
1486 | } | |
1487 | ||
1488 | OP(FILTER_OP_LOAD_FIELD_S8): | |
1489 | { | |
1490 | dbg_printk("op load field s8\n"); | |
1491 | ||
1492 | estack_ax_v = *(int8_t *) estack_ax(stack, top)->u.ptr.ptr; | |
1493 | next_pc += sizeof(struct load_op); | |
1494 | PO; | |
1495 | } | |
1496 | OP(FILTER_OP_LOAD_FIELD_S16): | |
1497 | { | |
1498 | dbg_printk("op load field s16\n"); | |
1499 | ||
1500 | estack_ax_v = *(int16_t *) estack_ax(stack, top)->u.ptr.ptr; | |
1501 | next_pc += sizeof(struct load_op); | |
1502 | PO; | |
1503 | } | |
1504 | OP(FILTER_OP_LOAD_FIELD_S32): | |
1505 | { | |
1506 | dbg_printk("op load field s32\n"); | |
1507 | ||
1508 | estack_ax_v = *(int32_t *) estack_ax(stack, top)->u.ptr.ptr; | |
1509 | next_pc += sizeof(struct load_op); | |
1510 | PO; | |
1511 | } | |
1512 | OP(FILTER_OP_LOAD_FIELD_S64): | |
1513 | { | |
1514 | dbg_printk("op load field s64\n"); | |
1515 | ||
1516 | estack_ax_v = *(int64_t *) estack_ax(stack, top)->u.ptr.ptr; | |
1517 | next_pc += sizeof(struct load_op); | |
1518 | PO; | |
1519 | } | |
1520 | OP(FILTER_OP_LOAD_FIELD_U8): | |
1521 | { | |
1522 | dbg_printk("op load field u8\n"); | |
1523 | ||
1524 | estack_ax_v = *(uint8_t *) estack_ax(stack, top)->u.ptr.ptr; | |
1525 | next_pc += sizeof(struct load_op); | |
1526 | PO; | |
1527 | } | |
1528 | OP(FILTER_OP_LOAD_FIELD_U16): | |
1529 | { | |
1530 | dbg_printk("op load field u16\n"); | |
1531 | ||
1532 | estack_ax_v = *(uint16_t *) estack_ax(stack, top)->u.ptr.ptr; | |
1533 | next_pc += sizeof(struct load_op); | |
1534 | PO; | |
1535 | } | |
1536 | OP(FILTER_OP_LOAD_FIELD_U32): | |
1537 | { | |
1538 | dbg_printk("op load field u32\n"); | |
1539 | ||
1540 | estack_ax_v = *(uint32_t *) estack_ax(stack, top)->u.ptr.ptr; | |
1541 | next_pc += sizeof(struct load_op); | |
1542 | PO; | |
1543 | } | |
1544 | OP(FILTER_OP_LOAD_FIELD_U64): | |
1545 | { | |
1546 | dbg_printk("op load field u64\n"); | |
1547 | ||
1548 | estack_ax_v = *(uint64_t *) estack_ax(stack, top)->u.ptr.ptr; | |
1549 | next_pc += sizeof(struct load_op); | |
1550 | PO; | |
1551 | } | |
1552 | OP(FILTER_OP_LOAD_FIELD_DOUBLE): | |
1553 | { | |
1554 | ret = -EINVAL; | |
1555 | goto end; | |
1556 | } | |
1557 | ||
1558 | OP(FILTER_OP_LOAD_FIELD_STRING): | |
1559 | { | |
1560 | const char *str; | |
1561 | ||
1562 | dbg_printk("op load field string\n"); | |
1563 | str = (const char *) estack_ax(stack, top)->u.ptr.ptr; | |
1564 | estack_ax(stack, top)->u.s.str = str; | |
1565 | if (unlikely(!estack_ax(stack, top)->u.s.str)) { | |
1566 | dbg_printk("Filter warning: loading a NULL string.\n"); | |
1567 | ret = -EINVAL; | |
1568 | goto end; | |
1569 | } | |
4efe037b | 1570 | estack_ax(stack, top)->u.s.seq_len = LTTNG_SIZE_MAX; |
3834b99f MD |
1571 | estack_ax(stack, top)->u.s.literal_type = |
1572 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
1573 | next_pc += sizeof(struct load_op); | |
1574 | PO; | |
1575 | } | |
1576 | ||
1577 | OP(FILTER_OP_LOAD_FIELD_SEQUENCE): | |
1578 | { | |
1579 | const char *ptr; | |
1580 | ||
1581 | dbg_printk("op load field string sequence\n"); | |
1582 | ptr = estack_ax(stack, top)->u.ptr.ptr; | |
1583 | estack_ax(stack, top)->u.s.seq_len = *(unsigned long *) ptr; | |
1584 | estack_ax(stack, top)->u.s.str = *(const char **) (ptr + sizeof(unsigned long)); | |
1585 | if (unlikely(!estack_ax(stack, top)->u.s.str)) { | |
1586 | dbg_printk("Filter warning: loading a NULL sequence.\n"); | |
1587 | ret = -EINVAL; | |
1588 | goto end; | |
1589 | } | |
1590 | estack_ax(stack, top)->u.s.literal_type = | |
1591 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
1592 | next_pc += sizeof(struct load_op); | |
1593 | PO; | |
1594 | } | |
1595 | ||
07dfc1d0 MD |
1596 | END_OP |
1597 | end: | |
1598 | /* return 0 (discard) on error */ | |
1599 | if (ret) | |
1600 | return 0; | |
1601 | return retval; | |
1602 | } | |
1603 | ||
1604 | #undef START_OP | |
1605 | #undef OP | |
1606 | #undef PO | |
1607 | #undef END_OP |