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 | ||
80bb2600 | 10 | #include <wrapper/uaccess.h> |
d9053936 | 11 | #include <wrapper/objtool.h> |
cbc19040 | 12 | #include <wrapper/types.h> |
3834b99f | 13 | #include <linux/swab.h> |
f127e61e | 14 | |
2df37e95 MD |
15 | #include <lttng/filter.h> |
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. */ | |
80bb2600 | 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 | ||
6f192a16 | 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); | |
6f192a16 | 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 | } | |
6f192a16 | 206 | if (has_user) |
f127e61e | 207 | pagefault_enable(); |
6f192a16 | 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 | { | |
a93d4e71 | 216 | return LTTNG_FILTER_DISCARD; |
07dfc1d0 MD |
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) { \ | |
5a15f70c | 229 | dbg_printk("LTTng: Executing op %s (%u)\n", \ |
07dfc1d0 MD |
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); | |
ceabb767 | 283 | if (field->type.u.integer.signedness) { |
3834b99f MD |
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; | |
ceabb767 | 293 | case atype_enum_nestable: |
3834b99f MD |
294 | { |
295 | const struct lttng_integer_type *itype = | |
ceabb767 | 296 | &field->type.u.enum_nestable.container_type->u.integer; |
3834b99f MD |
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 | } | |
ceabb767 MD |
310 | case atype_array_nestable: |
311 | if (!lttng_is_bytewise_integer(field->type.u.array_nestable.elem_type)) { | |
5a15f70c | 312 | printk(KERN_WARNING "LTTng: filter: Array nesting only supports integer types.\n"); |
3834b99f MD |
313 | return -EINVAL; |
314 | } | |
ceabb767 | 315 | if (field->type.u.array_nestable.elem_type->u.integer.encoding == lttng_encode_none) { |
5a15f70c | 316 | printk(KERN_WARNING "LTTng: filter: Only string arrays are supported for contexts.\n"); |
3834b99f MD |
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; | |
ceabb767 MD |
323 | case atype_sequence_nestable: |
324 | if (!lttng_is_bytewise_integer(field->type.u.sequence_nestable.elem_type)) { | |
5a15f70c | 325 | printk(KERN_WARNING "LTTng: filter: Sequence nesting only supports integer types.\n"); |
3834b99f MD |
326 | return -EINVAL; |
327 | } | |
ceabb767 | 328 | if (field->type.u.sequence_nestable.elem_type->u.integer.encoding == lttng_encode_none) { |
5a15f70c | 329 | printk(KERN_WARNING "LTTng: filter: Only string sequences are supported for contexts.\n"); |
3834b99f MD |
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; | |
3834b99f MD |
336 | case atype_string: |
337 | ptr->object_type = OBJECT_TYPE_STRING; | |
338 | ctx_field->get_value(ctx_field, lttng_probe_ctx, &v); | |
339 | ptr->ptr = v.str; | |
340 | break; | |
ceabb767 | 341 | case atype_struct_nestable: |
5a15f70c | 342 | printk(KERN_WARNING "LTTng: filter: Structure type cannot be loaded.\n"); |
3834b99f | 343 | return -EINVAL; |
ceabb767 | 344 | case atype_variant_nestable: |
5a15f70c | 345 | printk(KERN_WARNING "LTTng: filter: Variant type cannot be loaded.\n"); |
ceabb767 | 346 | return -EINVAL; |
3834b99f | 347 | default: |
5a15f70c | 348 | printk(KERN_WARNING "LTTng: filter: Unknown type: %d", (int) field->type.atype); |
3834b99f MD |
349 | return -EINVAL; |
350 | } | |
351 | return 0; | |
352 | } | |
353 | ||
354 | static int dynamic_get_index(struct lttng_probe_ctx *lttng_probe_ctx, | |
355 | struct bytecode_runtime *runtime, | |
356 | uint64_t index, struct estack_entry *stack_top) | |
357 | { | |
358 | int ret; | |
359 | const struct filter_get_index_data *gid; | |
360 | ||
361 | /* | |
362 | * Types nested within variants need to perform dynamic lookup | |
363 | * based on the field descriptions. LTTng-UST does not implement | |
364 | * variants for now. | |
365 | */ | |
366 | if (stack_top->u.ptr.field) | |
367 | return -EINVAL; | |
368 | gid = (const struct filter_get_index_data *) &runtime->data[index]; | |
369 | switch (stack_top->u.ptr.type) { | |
370 | case LOAD_OBJECT: | |
371 | switch (stack_top->u.ptr.object_type) { | |
372 | case OBJECT_TYPE_ARRAY: | |
373 | { | |
374 | const char *ptr; | |
375 | ||
376 | WARN_ON_ONCE(gid->offset >= gid->array_len); | |
377 | /* Skip count (unsigned long) */ | |
378 | ptr = *(const char **) (stack_top->u.ptr.ptr + sizeof(unsigned long)); | |
379 | ptr = ptr + gid->offset; | |
380 | stack_top->u.ptr.ptr = ptr; | |
381 | stack_top->u.ptr.object_type = gid->elem.type; | |
382 | stack_top->u.ptr.rev_bo = gid->elem.rev_bo; | |
383 | /* field is only used for types nested within variants. */ | |
384 | stack_top->u.ptr.field = NULL; | |
385 | break; | |
386 | } | |
387 | case OBJECT_TYPE_SEQUENCE: | |
388 | { | |
389 | const char *ptr; | |
390 | size_t ptr_seq_len; | |
391 | ||
392 | ptr = *(const char **) (stack_top->u.ptr.ptr + sizeof(unsigned long)); | |
393 | ptr_seq_len = *(unsigned long *) stack_top->u.ptr.ptr; | |
394 | if (gid->offset >= gid->elem.len * ptr_seq_len) { | |
395 | ret = -EINVAL; | |
396 | goto end; | |
397 | } | |
398 | ptr = ptr + gid->offset; | |
399 | stack_top->u.ptr.ptr = ptr; | |
400 | stack_top->u.ptr.object_type = gid->elem.type; | |
401 | stack_top->u.ptr.rev_bo = gid->elem.rev_bo; | |
402 | /* field is only used for types nested within variants. */ | |
403 | stack_top->u.ptr.field = NULL; | |
404 | break; | |
405 | } | |
406 | case OBJECT_TYPE_STRUCT: | |
5a15f70c | 407 | printk(KERN_WARNING "LTTng: filter: Nested structures are not supported yet.\n"); |
3834b99f MD |
408 | ret = -EINVAL; |
409 | goto end; | |
410 | case OBJECT_TYPE_VARIANT: | |
411 | default: | |
5a15f70c | 412 | printk(KERN_WARNING "LTTng: filter: Unexpected get index type %d", |
3834b99f MD |
413 | (int) stack_top->u.ptr.object_type); |
414 | ret = -EINVAL; | |
415 | goto end; | |
416 | } | |
417 | break; | |
418 | case LOAD_ROOT_CONTEXT: | |
419 | case LOAD_ROOT_APP_CONTEXT: /* Fall-through */ | |
420 | { | |
421 | ret = context_get_index(lttng_probe_ctx, | |
422 | &stack_top->u.ptr, | |
423 | gid->ctx_index); | |
424 | if (ret) { | |
425 | goto end; | |
426 | } | |
427 | break; | |
428 | } | |
429 | case LOAD_ROOT_PAYLOAD: | |
430 | stack_top->u.ptr.ptr += gid->offset; | |
431 | if (gid->elem.type == OBJECT_TYPE_STRING) | |
432 | stack_top->u.ptr.ptr = *(const char * const *) stack_top->u.ptr.ptr; | |
433 | stack_top->u.ptr.object_type = gid->elem.type; | |
434 | stack_top->u.ptr.type = LOAD_OBJECT; | |
435 | /* field is only used for types nested within variants. */ | |
436 | stack_top->u.ptr.field = NULL; | |
437 | break; | |
438 | } | |
439 | return 0; | |
440 | ||
441 | end: | |
442 | return ret; | |
443 | } | |
444 | ||
445 | static int dynamic_load_field(struct estack_entry *stack_top) | |
446 | { | |
447 | int ret; | |
448 | ||
449 | switch (stack_top->u.ptr.type) { | |
450 | case LOAD_OBJECT: | |
451 | break; | |
452 | case LOAD_ROOT_CONTEXT: | |
453 | case LOAD_ROOT_APP_CONTEXT: | |
454 | case LOAD_ROOT_PAYLOAD: | |
455 | default: | |
456 | dbg_printk("Filter warning: cannot load root, missing field name.\n"); | |
457 | ret = -EINVAL; | |
458 | goto end; | |
459 | } | |
460 | switch (stack_top->u.ptr.object_type) { | |
461 | case OBJECT_TYPE_S8: | |
462 | dbg_printk("op load field s8\n"); | |
463 | stack_top->u.v = *(int8_t *) stack_top->u.ptr.ptr; | |
464 | break; | |
465 | case OBJECT_TYPE_S16: | |
466 | { | |
467 | int16_t tmp; | |
468 | ||
469 | dbg_printk("op load field s16\n"); | |
470 | tmp = *(int16_t *) stack_top->u.ptr.ptr; | |
471 | if (stack_top->u.ptr.rev_bo) | |
472 | __swab16s(&tmp); | |
473 | stack_top->u.v = tmp; | |
474 | break; | |
475 | } | |
476 | case OBJECT_TYPE_S32: | |
477 | { | |
478 | int32_t tmp; | |
479 | ||
480 | dbg_printk("op load field s32\n"); | |
481 | tmp = *(int32_t *) stack_top->u.ptr.ptr; | |
482 | if (stack_top->u.ptr.rev_bo) | |
483 | __swab32s(&tmp); | |
484 | stack_top->u.v = tmp; | |
485 | break; | |
486 | } | |
487 | case OBJECT_TYPE_S64: | |
488 | { | |
489 | int64_t tmp; | |
490 | ||
491 | dbg_printk("op load field s64\n"); | |
492 | tmp = *(int64_t *) stack_top->u.ptr.ptr; | |
493 | if (stack_top->u.ptr.rev_bo) | |
494 | __swab64s(&tmp); | |
495 | stack_top->u.v = tmp; | |
496 | break; | |
497 | } | |
498 | case OBJECT_TYPE_U8: | |
499 | dbg_printk("op load field u8\n"); | |
500 | stack_top->u.v = *(uint8_t *) stack_top->u.ptr.ptr; | |
501 | break; | |
502 | case OBJECT_TYPE_U16: | |
503 | { | |
504 | uint16_t tmp; | |
505 | ||
5fae98f7 | 506 | dbg_printk("op load field u16\n"); |
3834b99f MD |
507 | tmp = *(uint16_t *) stack_top->u.ptr.ptr; |
508 | if (stack_top->u.ptr.rev_bo) | |
509 | __swab16s(&tmp); | |
510 | stack_top->u.v = tmp; | |
511 | break; | |
512 | } | |
513 | case OBJECT_TYPE_U32: | |
514 | { | |
515 | uint32_t tmp; | |
516 | ||
517 | dbg_printk("op load field u32\n"); | |
518 | tmp = *(uint32_t *) stack_top->u.ptr.ptr; | |
519 | if (stack_top->u.ptr.rev_bo) | |
520 | __swab32s(&tmp); | |
521 | stack_top->u.v = tmp; | |
522 | break; | |
523 | } | |
524 | case OBJECT_TYPE_U64: | |
525 | { | |
526 | uint64_t tmp; | |
527 | ||
528 | dbg_printk("op load field u64\n"); | |
529 | tmp = *(uint64_t *) stack_top->u.ptr.ptr; | |
530 | if (stack_top->u.ptr.rev_bo) | |
531 | __swab64s(&tmp); | |
532 | stack_top->u.v = tmp; | |
533 | break; | |
534 | } | |
535 | case OBJECT_TYPE_STRING: | |
536 | { | |
537 | const char *str; | |
538 | ||
539 | dbg_printk("op load field string\n"); | |
540 | str = (const char *) stack_top->u.ptr.ptr; | |
541 | stack_top->u.s.str = str; | |
542 | if (unlikely(!stack_top->u.s.str)) { | |
543 | dbg_printk("Filter warning: loading a NULL string.\n"); | |
544 | ret = -EINVAL; | |
545 | goto end; | |
546 | } | |
4efe037b | 547 | stack_top->u.s.seq_len = LTTNG_SIZE_MAX; |
3834b99f MD |
548 | stack_top->u.s.literal_type = |
549 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
550 | break; | |
551 | } | |
552 | case OBJECT_TYPE_STRING_SEQUENCE: | |
553 | { | |
554 | const char *ptr; | |
555 | ||
556 | dbg_printk("op load field string sequence\n"); | |
557 | ptr = stack_top->u.ptr.ptr; | |
558 | stack_top->u.s.seq_len = *(unsigned long *) ptr; | |
559 | stack_top->u.s.str = *(const char **) (ptr + sizeof(unsigned long)); | |
560 | if (unlikely(!stack_top->u.s.str)) { | |
561 | dbg_printk("Filter warning: loading a NULL sequence.\n"); | |
562 | ret = -EINVAL; | |
563 | goto end; | |
564 | } | |
565 | stack_top->u.s.literal_type = | |
566 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
567 | break; | |
568 | } | |
569 | case OBJECT_TYPE_DYNAMIC: | |
570 | /* | |
571 | * Dynamic types in context are looked up | |
572 | * by context get index. | |
573 | */ | |
574 | ret = -EINVAL; | |
575 | goto end; | |
576 | case OBJECT_TYPE_DOUBLE: | |
577 | ret = -EINVAL; | |
578 | goto end; | |
579 | case OBJECT_TYPE_SEQUENCE: | |
580 | case OBJECT_TYPE_ARRAY: | |
581 | case OBJECT_TYPE_STRUCT: | |
582 | case OBJECT_TYPE_VARIANT: | |
5a15f70c | 583 | printk(KERN_WARNING "LTTng: filter: Sequences, arrays, struct and variant cannot be loaded (nested types).\n"); |
3834b99f MD |
584 | ret = -EINVAL; |
585 | goto end; | |
586 | } | |
587 | return 0; | |
588 | ||
589 | end: | |
590 | return ret; | |
591 | } | |
592 | ||
07dfc1d0 MD |
593 | /* |
594 | * Return 0 (discard), or raise the 0x1 flag (log event). | |
595 | * Currently, other flags are kept for future extensions and have no | |
596 | * effect. | |
597 | */ | |
598 | uint64_t lttng_filter_interpret_bytecode(void *filter_data, | |
79150a49 | 599 | struct lttng_probe_ctx *lttng_probe_ctx, |
07dfc1d0 MD |
600 | const char *filter_stack_data) |
601 | { | |
602 | struct bytecode_runtime *bytecode = filter_data; | |
603 | void *pc, *next_pc, *start_pc; | |
604 | int ret = -EINVAL; | |
605 | uint64_t retval = 0; | |
606 | struct estack _stack; | |
607 | struct estack *stack = &_stack; | |
608 | register int64_t ax = 0, bx = 0; | |
609 | register int top = FILTER_STACK_EMPTY; | |
610 | #ifndef INTERPRETER_USE_SWITCH | |
611 | static void *dispatch[NR_FILTER_OPS] = { | |
612 | [ FILTER_OP_UNKNOWN ] = &&LABEL_FILTER_OP_UNKNOWN, | |
613 | ||
614 | [ FILTER_OP_RETURN ] = &&LABEL_FILTER_OP_RETURN, | |
615 | ||
616 | /* binary */ | |
617 | [ FILTER_OP_MUL ] = &&LABEL_FILTER_OP_MUL, | |
618 | [ FILTER_OP_DIV ] = &&LABEL_FILTER_OP_DIV, | |
619 | [ FILTER_OP_MOD ] = &&LABEL_FILTER_OP_MOD, | |
620 | [ FILTER_OP_PLUS ] = &&LABEL_FILTER_OP_PLUS, | |
621 | [ FILTER_OP_MINUS ] = &&LABEL_FILTER_OP_MINUS, | |
e16c054b MD |
622 | [ FILTER_OP_BIT_RSHIFT ] = &&LABEL_FILTER_OP_BIT_RSHIFT, |
623 | [ FILTER_OP_BIT_LSHIFT ] = &&LABEL_FILTER_OP_BIT_LSHIFT, | |
3834b99f MD |
624 | [ FILTER_OP_BIT_AND ] = &&LABEL_FILTER_OP_BIT_AND, |
625 | [ FILTER_OP_BIT_OR ] = &&LABEL_FILTER_OP_BIT_OR, | |
626 | [ FILTER_OP_BIT_XOR ] = &&LABEL_FILTER_OP_BIT_XOR, | |
07dfc1d0 MD |
627 | |
628 | /* binary comparators */ | |
629 | [ FILTER_OP_EQ ] = &&LABEL_FILTER_OP_EQ, | |
630 | [ FILTER_OP_NE ] = &&LABEL_FILTER_OP_NE, | |
631 | [ FILTER_OP_GT ] = &&LABEL_FILTER_OP_GT, | |
632 | [ FILTER_OP_LT ] = &&LABEL_FILTER_OP_LT, | |
633 | [ FILTER_OP_GE ] = &&LABEL_FILTER_OP_GE, | |
634 | [ FILTER_OP_LE ] = &&LABEL_FILTER_OP_LE, | |
635 | ||
636 | /* string binary comparator */ | |
637 | [ FILTER_OP_EQ_STRING ] = &&LABEL_FILTER_OP_EQ_STRING, | |
638 | [ FILTER_OP_NE_STRING ] = &&LABEL_FILTER_OP_NE_STRING, | |
639 | [ FILTER_OP_GT_STRING ] = &&LABEL_FILTER_OP_GT_STRING, | |
640 | [ FILTER_OP_LT_STRING ] = &&LABEL_FILTER_OP_LT_STRING, | |
641 | [ FILTER_OP_GE_STRING ] = &&LABEL_FILTER_OP_GE_STRING, | |
642 | [ FILTER_OP_LE_STRING ] = &&LABEL_FILTER_OP_LE_STRING, | |
643 | ||
02aca193 PP |
644 | /* globbing pattern binary comparator */ |
645 | [ FILTER_OP_EQ_STAR_GLOB_STRING ] = &&LABEL_FILTER_OP_EQ_STAR_GLOB_STRING, | |
646 | [ FILTER_OP_NE_STAR_GLOB_STRING ] = &&LABEL_FILTER_OP_NE_STAR_GLOB_STRING, | |
647 | ||
07dfc1d0 MD |
648 | /* s64 binary comparator */ |
649 | [ FILTER_OP_EQ_S64 ] = &&LABEL_FILTER_OP_EQ_S64, | |
650 | [ FILTER_OP_NE_S64 ] = &&LABEL_FILTER_OP_NE_S64, | |
651 | [ FILTER_OP_GT_S64 ] = &&LABEL_FILTER_OP_GT_S64, | |
652 | [ FILTER_OP_LT_S64 ] = &&LABEL_FILTER_OP_LT_S64, | |
653 | [ FILTER_OP_GE_S64 ] = &&LABEL_FILTER_OP_GE_S64, | |
654 | [ FILTER_OP_LE_S64 ] = &&LABEL_FILTER_OP_LE_S64, | |
655 | ||
656 | /* double binary comparator */ | |
657 | [ FILTER_OP_EQ_DOUBLE ] = &&LABEL_FILTER_OP_EQ_DOUBLE, | |
658 | [ FILTER_OP_NE_DOUBLE ] = &&LABEL_FILTER_OP_NE_DOUBLE, | |
659 | [ FILTER_OP_GT_DOUBLE ] = &&LABEL_FILTER_OP_GT_DOUBLE, | |
660 | [ FILTER_OP_LT_DOUBLE ] = &&LABEL_FILTER_OP_LT_DOUBLE, | |
661 | [ FILTER_OP_GE_DOUBLE ] = &&LABEL_FILTER_OP_GE_DOUBLE, | |
662 | [ FILTER_OP_LE_DOUBLE ] = &&LABEL_FILTER_OP_LE_DOUBLE, | |
663 | ||
664 | /* Mixed S64-double binary comparators */ | |
665 | [ FILTER_OP_EQ_DOUBLE_S64 ] = &&LABEL_FILTER_OP_EQ_DOUBLE_S64, | |
666 | [ FILTER_OP_NE_DOUBLE_S64 ] = &&LABEL_FILTER_OP_NE_DOUBLE_S64, | |
667 | [ FILTER_OP_GT_DOUBLE_S64 ] = &&LABEL_FILTER_OP_GT_DOUBLE_S64, | |
668 | [ FILTER_OP_LT_DOUBLE_S64 ] = &&LABEL_FILTER_OP_LT_DOUBLE_S64, | |
669 | [ FILTER_OP_GE_DOUBLE_S64 ] = &&LABEL_FILTER_OP_GE_DOUBLE_S64, | |
670 | [ FILTER_OP_LE_DOUBLE_S64 ] = &&LABEL_FILTER_OP_LE_DOUBLE_S64, | |
671 | ||
672 | [ FILTER_OP_EQ_S64_DOUBLE ] = &&LABEL_FILTER_OP_EQ_S64_DOUBLE, | |
673 | [ FILTER_OP_NE_S64_DOUBLE ] = &&LABEL_FILTER_OP_NE_S64_DOUBLE, | |
674 | [ FILTER_OP_GT_S64_DOUBLE ] = &&LABEL_FILTER_OP_GT_S64_DOUBLE, | |
675 | [ FILTER_OP_LT_S64_DOUBLE ] = &&LABEL_FILTER_OP_LT_S64_DOUBLE, | |
676 | [ FILTER_OP_GE_S64_DOUBLE ] = &&LABEL_FILTER_OP_GE_S64_DOUBLE, | |
677 | [ FILTER_OP_LE_S64_DOUBLE ] = &&LABEL_FILTER_OP_LE_S64_DOUBLE, | |
678 | ||
679 | /* unary */ | |
680 | [ FILTER_OP_UNARY_PLUS ] = &&LABEL_FILTER_OP_UNARY_PLUS, | |
681 | [ FILTER_OP_UNARY_MINUS ] = &&LABEL_FILTER_OP_UNARY_MINUS, | |
682 | [ FILTER_OP_UNARY_NOT ] = &&LABEL_FILTER_OP_UNARY_NOT, | |
683 | [ FILTER_OP_UNARY_PLUS_S64 ] = &&LABEL_FILTER_OP_UNARY_PLUS_S64, | |
684 | [ FILTER_OP_UNARY_MINUS_S64 ] = &&LABEL_FILTER_OP_UNARY_MINUS_S64, | |
685 | [ FILTER_OP_UNARY_NOT_S64 ] = &&LABEL_FILTER_OP_UNARY_NOT_S64, | |
686 | [ FILTER_OP_UNARY_PLUS_DOUBLE ] = &&LABEL_FILTER_OP_UNARY_PLUS_DOUBLE, | |
687 | [ FILTER_OP_UNARY_MINUS_DOUBLE ] = &&LABEL_FILTER_OP_UNARY_MINUS_DOUBLE, | |
688 | [ FILTER_OP_UNARY_NOT_DOUBLE ] = &&LABEL_FILTER_OP_UNARY_NOT_DOUBLE, | |
689 | ||
690 | /* logical */ | |
691 | [ FILTER_OP_AND ] = &&LABEL_FILTER_OP_AND, | |
692 | [ FILTER_OP_OR ] = &&LABEL_FILTER_OP_OR, | |
693 | ||
694 | /* load field ref */ | |
695 | [ FILTER_OP_LOAD_FIELD_REF ] = &&LABEL_FILTER_OP_LOAD_FIELD_REF, | |
696 | [ FILTER_OP_LOAD_FIELD_REF_STRING ] = &&LABEL_FILTER_OP_LOAD_FIELD_REF_STRING, | |
697 | [ FILTER_OP_LOAD_FIELD_REF_SEQUENCE ] = &&LABEL_FILTER_OP_LOAD_FIELD_REF_SEQUENCE, | |
698 | [ FILTER_OP_LOAD_FIELD_REF_S64 ] = &&LABEL_FILTER_OP_LOAD_FIELD_REF_S64, | |
699 | [ FILTER_OP_LOAD_FIELD_REF_DOUBLE ] = &&LABEL_FILTER_OP_LOAD_FIELD_REF_DOUBLE, | |
700 | ||
701 | /* load from immediate operand */ | |
702 | [ FILTER_OP_LOAD_STRING ] = &&LABEL_FILTER_OP_LOAD_STRING, | |
02aca193 | 703 | [ FILTER_OP_LOAD_STAR_GLOB_STRING ] = &&LABEL_FILTER_OP_LOAD_STAR_GLOB_STRING, |
07dfc1d0 MD |
704 | [ FILTER_OP_LOAD_S64 ] = &&LABEL_FILTER_OP_LOAD_S64, |
705 | [ FILTER_OP_LOAD_DOUBLE ] = &&LABEL_FILTER_OP_LOAD_DOUBLE, | |
706 | ||
707 | /* cast */ | |
708 | [ FILTER_OP_CAST_TO_S64 ] = &&LABEL_FILTER_OP_CAST_TO_S64, | |
709 | [ FILTER_OP_CAST_DOUBLE_TO_S64 ] = &&LABEL_FILTER_OP_CAST_DOUBLE_TO_S64, | |
710 | [ FILTER_OP_CAST_NOP ] = &&LABEL_FILTER_OP_CAST_NOP, | |
711 | ||
712 | /* get context ref */ | |
713 | [ FILTER_OP_GET_CONTEXT_REF ] = &&LABEL_FILTER_OP_GET_CONTEXT_REF, | |
714 | [ FILTER_OP_GET_CONTEXT_REF_STRING ] = &&LABEL_FILTER_OP_GET_CONTEXT_REF_STRING, | |
715 | [ FILTER_OP_GET_CONTEXT_REF_S64 ] = &&LABEL_FILTER_OP_GET_CONTEXT_REF_S64, | |
716 | [ FILTER_OP_GET_CONTEXT_REF_DOUBLE ] = &&LABEL_FILTER_OP_GET_CONTEXT_REF_DOUBLE, | |
f127e61e MD |
717 | |
718 | /* load userspace field ref */ | |
719 | [ FILTER_OP_LOAD_FIELD_REF_USER_STRING ] = &&LABEL_FILTER_OP_LOAD_FIELD_REF_USER_STRING, | |
720 | [ FILTER_OP_LOAD_FIELD_REF_USER_SEQUENCE ] = &&LABEL_FILTER_OP_LOAD_FIELD_REF_USER_SEQUENCE, | |
3834b99f MD |
721 | |
722 | /* Instructions for recursive traversal through composed types. */ | |
723 | [ FILTER_OP_GET_CONTEXT_ROOT ] = &&LABEL_FILTER_OP_GET_CONTEXT_ROOT, | |
724 | [ FILTER_OP_GET_APP_CONTEXT_ROOT ] = &&LABEL_FILTER_OP_GET_APP_CONTEXT_ROOT, | |
725 | [ FILTER_OP_GET_PAYLOAD_ROOT ] = &&LABEL_FILTER_OP_GET_PAYLOAD_ROOT, | |
726 | ||
727 | [ FILTER_OP_GET_SYMBOL ] = &&LABEL_FILTER_OP_GET_SYMBOL, | |
728 | [ FILTER_OP_GET_SYMBOL_FIELD ] = &&LABEL_FILTER_OP_GET_SYMBOL_FIELD, | |
729 | [ FILTER_OP_GET_INDEX_U16 ] = &&LABEL_FILTER_OP_GET_INDEX_U16, | |
730 | [ FILTER_OP_GET_INDEX_U64 ] = &&LABEL_FILTER_OP_GET_INDEX_U64, | |
731 | ||
732 | [ FILTER_OP_LOAD_FIELD ] = &&LABEL_FILTER_OP_LOAD_FIELD, | |
733 | [ FILTER_OP_LOAD_FIELD_S8 ] = &&LABEL_FILTER_OP_LOAD_FIELD_S8, | |
734 | [ FILTER_OP_LOAD_FIELD_S16 ] = &&LABEL_FILTER_OP_LOAD_FIELD_S16, | |
735 | [ FILTER_OP_LOAD_FIELD_S32 ] = &&LABEL_FILTER_OP_LOAD_FIELD_S32, | |
736 | [ FILTER_OP_LOAD_FIELD_S64 ] = &&LABEL_FILTER_OP_LOAD_FIELD_S64, | |
737 | [ FILTER_OP_LOAD_FIELD_U8 ] = &&LABEL_FILTER_OP_LOAD_FIELD_U8, | |
738 | [ FILTER_OP_LOAD_FIELD_U16 ] = &&LABEL_FILTER_OP_LOAD_FIELD_U16, | |
739 | [ FILTER_OP_LOAD_FIELD_U32 ] = &&LABEL_FILTER_OP_LOAD_FIELD_U32, | |
740 | [ FILTER_OP_LOAD_FIELD_U64 ] = &&LABEL_FILTER_OP_LOAD_FIELD_U64, | |
741 | [ FILTER_OP_LOAD_FIELD_STRING ] = &&LABEL_FILTER_OP_LOAD_FIELD_STRING, | |
742 | [ FILTER_OP_LOAD_FIELD_SEQUENCE ] = &&LABEL_FILTER_OP_LOAD_FIELD_SEQUENCE, | |
743 | [ FILTER_OP_LOAD_FIELD_DOUBLE ] = &&LABEL_FILTER_OP_LOAD_FIELD_DOUBLE, | |
e16c054b MD |
744 | |
745 | [ FILTER_OP_UNARY_BIT_NOT ] = &&LABEL_FILTER_OP_UNARY_BIT_NOT, | |
57ba4b41 MD |
746 | |
747 | [ FILTER_OP_RETURN_S64 ] = &&LABEL_FILTER_OP_RETURN_S64, | |
07dfc1d0 MD |
748 | }; |
749 | #endif /* #ifndef INTERPRETER_USE_SWITCH */ | |
750 | ||
751 | START_OP | |
752 | ||
753 | OP(FILTER_OP_UNKNOWN): | |
754 | OP(FILTER_OP_LOAD_FIELD_REF): | |
755 | OP(FILTER_OP_GET_CONTEXT_REF): | |
756 | #ifdef INTERPRETER_USE_SWITCH | |
757 | default: | |
758 | #endif /* INTERPRETER_USE_SWITCH */ | |
5a15f70c | 759 | printk(KERN_WARNING "LTTng: filter: unknown bytecode op %u\n", |
07dfc1d0 MD |
760 | (unsigned int) *(filter_opcode_t *) pc); |
761 | ret = -EINVAL; | |
762 | goto end; | |
763 | ||
764 | OP(FILTER_OP_RETURN): | |
57ba4b41 | 765 | OP(FILTER_OP_RETURN_S64): |
a93d4e71 | 766 | /* LTTNG_FILTER_DISCARD or LTTNG_FILTER_RECORD_FLAG */ |
07dfc1d0 MD |
767 | retval = !!estack_ax_v; |
768 | ret = 0; | |
769 | goto end; | |
770 | ||
771 | /* binary */ | |
772 | OP(FILTER_OP_MUL): | |
773 | OP(FILTER_OP_DIV): | |
774 | OP(FILTER_OP_MOD): | |
775 | OP(FILTER_OP_PLUS): | |
776 | OP(FILTER_OP_MINUS): | |
5a15f70c | 777 | printk(KERN_WARNING "LTTng: filter: unsupported bytecode op %u\n", |
07dfc1d0 MD |
778 | (unsigned int) *(filter_opcode_t *) pc); |
779 | ret = -EINVAL; | |
780 | goto end; | |
781 | ||
782 | OP(FILTER_OP_EQ): | |
783 | OP(FILTER_OP_NE): | |
784 | OP(FILTER_OP_GT): | |
785 | OP(FILTER_OP_LT): | |
786 | OP(FILTER_OP_GE): | |
787 | OP(FILTER_OP_LE): | |
5a15f70c | 788 | printk(KERN_WARNING "LTTng: filter: unsupported non-specialized bytecode op %u\n", |
07dfc1d0 MD |
789 | (unsigned int) *(filter_opcode_t *) pc); |
790 | ret = -EINVAL; | |
791 | goto end; | |
792 | ||
793 | OP(FILTER_OP_EQ_STRING): | |
794 | { | |
795 | int res; | |
796 | ||
797 | res = (stack_strcmp(stack, top, "==") == 0); | |
798 | estack_pop(stack, top, ax, bx); | |
799 | estack_ax_v = res; | |
800 | next_pc += sizeof(struct binary_op); | |
801 | PO; | |
802 | } | |
803 | OP(FILTER_OP_NE_STRING): | |
804 | { | |
805 | int res; | |
806 | ||
807 | res = (stack_strcmp(stack, top, "!=") != 0); | |
808 | estack_pop(stack, top, ax, bx); | |
809 | estack_ax_v = res; | |
810 | next_pc += sizeof(struct binary_op); | |
811 | PO; | |
812 | } | |
813 | OP(FILTER_OP_GT_STRING): | |
814 | { | |
815 | int res; | |
816 | ||
817 | res = (stack_strcmp(stack, top, ">") > 0); | |
818 | estack_pop(stack, top, ax, bx); | |
819 | estack_ax_v = res; | |
820 | next_pc += sizeof(struct binary_op); | |
821 | PO; | |
822 | } | |
823 | OP(FILTER_OP_LT_STRING): | |
824 | { | |
825 | int res; | |
826 | ||
827 | res = (stack_strcmp(stack, top, "<") < 0); | |
828 | estack_pop(stack, top, ax, bx); | |
829 | estack_ax_v = res; | |
830 | next_pc += sizeof(struct binary_op); | |
831 | PO; | |
832 | } | |
833 | OP(FILTER_OP_GE_STRING): | |
834 | { | |
835 | int res; | |
836 | ||
837 | res = (stack_strcmp(stack, top, ">=") >= 0); | |
838 | estack_pop(stack, top, ax, bx); | |
839 | estack_ax_v = res; | |
840 | next_pc += sizeof(struct binary_op); | |
841 | PO; | |
842 | } | |
843 | OP(FILTER_OP_LE_STRING): | |
844 | { | |
845 | int res; | |
846 | ||
847 | res = (stack_strcmp(stack, top, "<=") <= 0); | |
848 | estack_pop(stack, top, ax, bx); | |
849 | estack_ax_v = res; | |
850 | next_pc += sizeof(struct binary_op); | |
851 | PO; | |
852 | } | |
853 | ||
02aca193 PP |
854 | OP(FILTER_OP_EQ_STAR_GLOB_STRING): |
855 | { | |
856 | int res; | |
857 | ||
858 | res = (stack_star_glob_match(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 | OP(FILTER_OP_NE_STAR_GLOB_STRING): | |
865 | { | |
866 | int res; | |
867 | ||
868 | res = (stack_star_glob_match(stack, top, "!=") != 0); | |
869 | estack_pop(stack, top, ax, bx); | |
870 | estack_ax_v = res; | |
871 | next_pc += sizeof(struct binary_op); | |
872 | PO; | |
873 | } | |
874 | ||
07dfc1d0 MD |
875 | OP(FILTER_OP_EQ_S64): |
876 | { | |
877 | int res; | |
878 | ||
879 | res = (estack_bx_v == estack_ax_v); | |
880 | estack_pop(stack, top, ax, bx); | |
881 | estack_ax_v = res; | |
882 | next_pc += sizeof(struct binary_op); | |
883 | PO; | |
884 | } | |
885 | OP(FILTER_OP_NE_S64): | |
886 | { | |
887 | int res; | |
888 | ||
889 | res = (estack_bx_v != estack_ax_v); | |
890 | estack_pop(stack, top, ax, bx); | |
891 | estack_ax_v = res; | |
892 | next_pc += sizeof(struct binary_op); | |
893 | PO; | |
894 | } | |
895 | OP(FILTER_OP_GT_S64): | |
896 | { | |
897 | int res; | |
898 | ||
899 | res = (estack_bx_v > estack_ax_v); | |
900 | estack_pop(stack, top, ax, bx); | |
901 | estack_ax_v = res; | |
902 | next_pc += sizeof(struct binary_op); | |
903 | PO; | |
904 | } | |
905 | OP(FILTER_OP_LT_S64): | |
906 | { | |
907 | int res; | |
908 | ||
909 | res = (estack_bx_v < estack_ax_v); | |
910 | estack_pop(stack, top, ax, bx); | |
911 | estack_ax_v = res; | |
912 | next_pc += sizeof(struct binary_op); | |
913 | PO; | |
914 | } | |
915 | OP(FILTER_OP_GE_S64): | |
916 | { | |
917 | int res; | |
918 | ||
919 | res = (estack_bx_v >= estack_ax_v); | |
920 | estack_pop(stack, top, ax, bx); | |
921 | estack_ax_v = res; | |
922 | next_pc += sizeof(struct binary_op); | |
923 | PO; | |
924 | } | |
925 | OP(FILTER_OP_LE_S64): | |
926 | { | |
927 | int res; | |
928 | ||
929 | res = (estack_bx_v <= estack_ax_v); | |
930 | estack_pop(stack, top, ax, bx); | |
931 | estack_ax_v = res; | |
932 | next_pc += sizeof(struct binary_op); | |
933 | PO; | |
934 | } | |
935 | ||
936 | OP(FILTER_OP_EQ_DOUBLE): | |
937 | OP(FILTER_OP_NE_DOUBLE): | |
938 | OP(FILTER_OP_GT_DOUBLE): | |
939 | OP(FILTER_OP_LT_DOUBLE): | |
940 | OP(FILTER_OP_GE_DOUBLE): | |
941 | OP(FILTER_OP_LE_DOUBLE): | |
942 | { | |
943 | BUG_ON(1); | |
944 | PO; | |
945 | } | |
946 | ||
947 | /* Mixed S64-double binary comparators */ | |
948 | OP(FILTER_OP_EQ_DOUBLE_S64): | |
949 | OP(FILTER_OP_NE_DOUBLE_S64): | |
950 | OP(FILTER_OP_GT_DOUBLE_S64): | |
951 | OP(FILTER_OP_LT_DOUBLE_S64): | |
952 | OP(FILTER_OP_GE_DOUBLE_S64): | |
953 | OP(FILTER_OP_LE_DOUBLE_S64): | |
954 | OP(FILTER_OP_EQ_S64_DOUBLE): | |
955 | OP(FILTER_OP_NE_S64_DOUBLE): | |
956 | OP(FILTER_OP_GT_S64_DOUBLE): | |
957 | OP(FILTER_OP_LT_S64_DOUBLE): | |
958 | OP(FILTER_OP_GE_S64_DOUBLE): | |
959 | OP(FILTER_OP_LE_S64_DOUBLE): | |
960 | { | |
961 | BUG_ON(1); | |
962 | PO; | |
963 | } | |
e16c054b MD |
964 | OP(FILTER_OP_BIT_RSHIFT): |
965 | { | |
966 | int64_t res; | |
967 | ||
ea13ec96 MD |
968 | /* Catch undefined behavior. */ |
969 | if (unlikely(estack_ax_v < 0 || estack_ax_v >= 64)) { | |
970 | ret = -EINVAL; | |
971 | goto end; | |
972 | } | |
f8d42740 | 973 | res = ((uint64_t) estack_bx_v >> (uint32_t) estack_ax_v); |
e16c054b MD |
974 | estack_pop(stack, top, ax, bx); |
975 | estack_ax_v = res; | |
976 | next_pc += sizeof(struct binary_op); | |
977 | PO; | |
978 | } | |
979 | OP(FILTER_OP_BIT_LSHIFT): | |
980 | { | |
981 | int64_t res; | |
982 | ||
ea13ec96 MD |
983 | /* Catch undefined behavior. */ |
984 | if (unlikely(estack_ax_v < 0 || estack_ax_v >= 64)) { | |
985 | ret = -EINVAL; | |
986 | goto end; | |
987 | } | |
f8d42740 | 988 | res = ((uint64_t) estack_bx_v << (uint32_t) estack_ax_v); |
e16c054b MD |
989 | estack_pop(stack, top, ax, bx); |
990 | estack_ax_v = res; | |
991 | next_pc += sizeof(struct binary_op); | |
992 | PO; | |
993 | } | |
3834b99f MD |
994 | OP(FILTER_OP_BIT_AND): |
995 | { | |
996 | int64_t res; | |
997 | ||
f8d42740 | 998 | res = ((uint64_t) estack_bx_v & (uint64_t) estack_ax_v); |
3834b99f MD |
999 | estack_pop(stack, top, ax, bx); |
1000 | estack_ax_v = res; | |
1001 | next_pc += sizeof(struct binary_op); | |
1002 | PO; | |
1003 | } | |
1004 | OP(FILTER_OP_BIT_OR): | |
1005 | { | |
1006 | int64_t res; | |
1007 | ||
f8d42740 | 1008 | res = ((uint64_t) estack_bx_v | (uint64_t) estack_ax_v); |
3834b99f MD |
1009 | estack_pop(stack, top, ax, bx); |
1010 | estack_ax_v = res; | |
1011 | next_pc += sizeof(struct binary_op); | |
1012 | PO; | |
1013 | } | |
1014 | OP(FILTER_OP_BIT_XOR): | |
1015 | { | |
1016 | int64_t res; | |
1017 | ||
f8d42740 | 1018 | res = ((uint64_t) estack_bx_v ^ (uint64_t) estack_ax_v); |
3834b99f MD |
1019 | estack_pop(stack, top, ax, bx); |
1020 | estack_ax_v = res; | |
1021 | next_pc += sizeof(struct binary_op); | |
1022 | PO; | |
1023 | } | |
07dfc1d0 MD |
1024 | |
1025 | /* unary */ | |
1026 | OP(FILTER_OP_UNARY_PLUS): | |
1027 | OP(FILTER_OP_UNARY_MINUS): | |
1028 | OP(FILTER_OP_UNARY_NOT): | |
5a15f70c | 1029 | printk(KERN_WARNING "LTTng: filter: unsupported non-specialized bytecode op %u\n", |
07dfc1d0 MD |
1030 | (unsigned int) *(filter_opcode_t *) pc); |
1031 | ret = -EINVAL; | |
1032 | goto end; | |
1033 | ||
1034 | ||
e16c054b MD |
1035 | OP(FILTER_OP_UNARY_BIT_NOT): |
1036 | { | |
f8d42740 | 1037 | estack_ax_v = ~(uint64_t) estack_ax_v; |
e16c054b MD |
1038 | next_pc += sizeof(struct unary_op); |
1039 | PO; | |
1040 | } | |
1041 | ||
07dfc1d0 MD |
1042 | OP(FILTER_OP_UNARY_PLUS_S64): |
1043 | { | |
1044 | next_pc += sizeof(struct unary_op); | |
1045 | PO; | |
1046 | } | |
1047 | OP(FILTER_OP_UNARY_MINUS_S64): | |
1048 | { | |
1049 | estack_ax_v = -estack_ax_v; | |
1050 | next_pc += sizeof(struct unary_op); | |
1051 | PO; | |
1052 | } | |
1053 | OP(FILTER_OP_UNARY_PLUS_DOUBLE): | |
1054 | OP(FILTER_OP_UNARY_MINUS_DOUBLE): | |
1055 | { | |
1056 | BUG_ON(1); | |
1057 | PO; | |
1058 | } | |
1059 | OP(FILTER_OP_UNARY_NOT_S64): | |
1060 | { | |
1061 | estack_ax_v = !estack_ax_v; | |
1062 | next_pc += sizeof(struct unary_op); | |
1063 | PO; | |
1064 | } | |
1065 | OP(FILTER_OP_UNARY_NOT_DOUBLE): | |
1066 | { | |
1067 | BUG_ON(1); | |
1068 | PO; | |
1069 | } | |
1070 | ||
1071 | /* logical */ | |
1072 | OP(FILTER_OP_AND): | |
1073 | { | |
1074 | struct logical_op *insn = (struct logical_op *) pc; | |
1075 | ||
1076 | /* If AX is 0, skip and evaluate to 0 */ | |
1077 | if (unlikely(estack_ax_v == 0)) { | |
1078 | dbg_printk("Jumping to bytecode offset %u\n", | |
1079 | (unsigned int) insn->skip_offset); | |
1080 | next_pc = start_pc + insn->skip_offset; | |
1081 | } else { | |
1082 | /* Pop 1 when jump not taken */ | |
1083 | estack_pop(stack, top, ax, bx); | |
1084 | next_pc += sizeof(struct logical_op); | |
1085 | } | |
1086 | PO; | |
1087 | } | |
1088 | OP(FILTER_OP_OR): | |
1089 | { | |
1090 | struct logical_op *insn = (struct logical_op *) pc; | |
1091 | ||
1092 | /* If AX is nonzero, skip and evaluate to 1 */ | |
1093 | ||
1094 | if (unlikely(estack_ax_v != 0)) { | |
1095 | estack_ax_v = 1; | |
1096 | dbg_printk("Jumping to bytecode offset %u\n", | |
1097 | (unsigned int) insn->skip_offset); | |
1098 | next_pc = start_pc + insn->skip_offset; | |
1099 | } else { | |
1100 | /* Pop 1 when jump not taken */ | |
1101 | estack_pop(stack, top, ax, bx); | |
1102 | next_pc += sizeof(struct logical_op); | |
1103 | } | |
1104 | PO; | |
1105 | } | |
1106 | ||
1107 | ||
1108 | /* load field ref */ | |
1109 | OP(FILTER_OP_LOAD_FIELD_REF_STRING): | |
1110 | { | |
1111 | struct load_op *insn = (struct load_op *) pc; | |
1112 | struct field_ref *ref = (struct field_ref *) insn->data; | |
1113 | ||
1114 | dbg_printk("load field ref offset %u type string\n", | |
1115 | ref->offset); | |
1116 | estack_push(stack, top, ax, bx); | |
1117 | estack_ax(stack, top)->u.s.str = | |
1118 | *(const char * const *) &filter_stack_data[ref->offset]; | |
1119 | if (unlikely(!estack_ax(stack, top)->u.s.str)) { | |
1120 | dbg_printk("Filter warning: loading a NULL string.\n"); | |
1121 | ret = -EINVAL; | |
1122 | goto end; | |
1123 | } | |
cbc19040 | 1124 | estack_ax(stack, top)->u.s.seq_len = LTTNG_SIZE_MAX; |
02aca193 PP |
1125 | estack_ax(stack, top)->u.s.literal_type = |
1126 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
f127e61e | 1127 | estack_ax(stack, top)->u.s.user = 0; |
07dfc1d0 MD |
1128 | dbg_printk("ref load string %s\n", estack_ax(stack, top)->u.s.str); |
1129 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
1130 | PO; | |
1131 | } | |
1132 | ||
1133 | OP(FILTER_OP_LOAD_FIELD_REF_SEQUENCE): | |
1134 | { | |
1135 | struct load_op *insn = (struct load_op *) pc; | |
1136 | struct field_ref *ref = (struct field_ref *) insn->data; | |
1137 | ||
1138 | dbg_printk("load field ref offset %u type sequence\n", | |
1139 | ref->offset); | |
1140 | estack_push(stack, top, ax, bx); | |
1141 | estack_ax(stack, top)->u.s.seq_len = | |
1142 | *(unsigned long *) &filter_stack_data[ref->offset]; | |
1143 | estack_ax(stack, top)->u.s.str = | |
1144 | *(const char **) (&filter_stack_data[ref->offset | |
1145 | + sizeof(unsigned long)]); | |
1146 | if (unlikely(!estack_ax(stack, top)->u.s.str)) { | |
1147 | dbg_printk("Filter warning: loading a NULL sequence.\n"); | |
1148 | ret = -EINVAL; | |
1149 | goto end; | |
1150 | } | |
02aca193 PP |
1151 | estack_ax(stack, top)->u.s.literal_type = |
1152 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
f127e61e | 1153 | estack_ax(stack, top)->u.s.user = 0; |
07dfc1d0 MD |
1154 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); |
1155 | PO; | |
1156 | } | |
1157 | ||
1158 | OP(FILTER_OP_LOAD_FIELD_REF_S64): | |
1159 | { | |
1160 | struct load_op *insn = (struct load_op *) pc; | |
1161 | struct field_ref *ref = (struct field_ref *) insn->data; | |
1162 | ||
1163 | dbg_printk("load field ref offset %u type s64\n", | |
1164 | ref->offset); | |
1165 | estack_push(stack, top, ax, bx); | |
1166 | estack_ax_v = | |
1167 | ((struct literal_numeric *) &filter_stack_data[ref->offset])->v; | |
1168 | dbg_printk("ref load s64 %lld\n", | |
1169 | (long long) estack_ax_v); | |
1170 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
1171 | PO; | |
1172 | } | |
1173 | ||
1174 | OP(FILTER_OP_LOAD_FIELD_REF_DOUBLE): | |
1175 | { | |
1176 | BUG_ON(1); | |
1177 | PO; | |
1178 | } | |
1179 | ||
1180 | /* load from immediate operand */ | |
1181 | OP(FILTER_OP_LOAD_STRING): | |
1182 | { | |
1183 | struct load_op *insn = (struct load_op *) pc; | |
1184 | ||
1185 | dbg_printk("load string %s\n", insn->data); | |
1186 | estack_push(stack, top, ax, bx); | |
1187 | estack_ax(stack, top)->u.s.str = insn->data; | |
cbc19040 | 1188 | estack_ax(stack, top)->u.s.seq_len = LTTNG_SIZE_MAX; |
02aca193 PP |
1189 | estack_ax(stack, top)->u.s.literal_type = |
1190 | ESTACK_STRING_LITERAL_TYPE_PLAIN; | |
1191 | estack_ax(stack, top)->u.s.user = 0; | |
1192 | next_pc += sizeof(struct load_op) + strlen(insn->data) + 1; | |
1193 | PO; | |
1194 | } | |
1195 | ||
1196 | OP(FILTER_OP_LOAD_STAR_GLOB_STRING): | |
1197 | { | |
1198 | struct load_op *insn = (struct load_op *) pc; | |
1199 | ||
1200 | dbg_printk("load globbing pattern %s\n", insn->data); | |
1201 | estack_push(stack, top, ax, bx); | |
1202 | estack_ax(stack, top)->u.s.str = insn->data; | |
cbc19040 | 1203 | estack_ax(stack, top)->u.s.seq_len = LTTNG_SIZE_MAX; |
02aca193 PP |
1204 | estack_ax(stack, top)->u.s.literal_type = |
1205 | ESTACK_STRING_LITERAL_TYPE_STAR_GLOB; | |
f127e61e | 1206 | estack_ax(stack, top)->u.s.user = 0; |
07dfc1d0 MD |
1207 | next_pc += sizeof(struct load_op) + strlen(insn->data) + 1; |
1208 | PO; | |
1209 | } | |
1210 | ||
1211 | OP(FILTER_OP_LOAD_S64): | |
1212 | { | |
1213 | struct load_op *insn = (struct load_op *) pc; | |
1214 | ||
1215 | estack_push(stack, top, ax, bx); | |
1216 | estack_ax_v = ((struct literal_numeric *) insn->data)->v; | |
1217 | dbg_printk("load s64 %lld\n", | |
1218 | (long long) estack_ax_v); | |
1219 | next_pc += sizeof(struct load_op) | |
1220 | + sizeof(struct literal_numeric); | |
1221 | PO; | |
1222 | } | |
1223 | ||
1224 | OP(FILTER_OP_LOAD_DOUBLE): | |
1225 | { | |
1226 | BUG_ON(1); | |
1227 | PO; | |
1228 | } | |
1229 | ||
1230 | /* cast */ | |
1231 | OP(FILTER_OP_CAST_TO_S64): | |
5a15f70c | 1232 | printk(KERN_WARNING "LTTng: filter: unsupported non-specialized bytecode op %u\n", |
07dfc1d0 MD |
1233 | (unsigned int) *(filter_opcode_t *) pc); |
1234 | ret = -EINVAL; | |
1235 | goto end; | |
1236 | ||
1237 | OP(FILTER_OP_CAST_DOUBLE_TO_S64): | |
1238 | { | |
1239 | BUG_ON(1); | |
1240 | PO; | |
1241 | } | |
1242 | ||
1243 | OP(FILTER_OP_CAST_NOP): | |
1244 | { | |
1245 | next_pc += sizeof(struct cast_op); | |
1246 | PO; | |
1247 | } | |
1248 | ||
1249 | /* get context ref */ | |
1250 | OP(FILTER_OP_GET_CONTEXT_REF_STRING): | |
1251 | { | |
1252 | struct load_op *insn = (struct load_op *) pc; | |
1253 | struct field_ref *ref = (struct field_ref *) insn->data; | |
1254 | struct lttng_ctx_field *ctx_field; | |
1255 | union lttng_ctx_value v; | |
1256 | ||
1257 | dbg_printk("get context ref offset %u type string\n", | |
1258 | ref->offset); | |
1259 | ctx_field = <tng_static_ctx->fields[ref->offset]; | |
79150a49 | 1260 | ctx_field->get_value(ctx_field, lttng_probe_ctx, &v); |
07dfc1d0 MD |
1261 | estack_push(stack, top, ax, bx); |
1262 | estack_ax(stack, top)->u.s.str = v.str; | |
1263 | if (unlikely(!estack_ax(stack, top)->u.s.str)) { | |
1264 | dbg_printk("Filter warning: loading a NULL string.\n"); | |
1265 | ret = -EINVAL; | |
1266 | goto end; | |
1267 | } | |
cbc19040 | 1268 | estack_ax(stack, top)->u.s.seq_len = LTTNG_SIZE_MAX; |
02aca193 PP |
1269 | estack_ax(stack, top)->u.s.literal_type = |
1270 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
f127e61e | 1271 | estack_ax(stack, top)->u.s.user = 0; |
07dfc1d0 MD |
1272 | dbg_printk("ref get context string %s\n", estack_ax(stack, top)->u.s.str); |
1273 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
1274 | PO; | |
1275 | } | |
1276 | ||
1277 | OP(FILTER_OP_GET_CONTEXT_REF_S64): | |
1278 | { | |
1279 | struct load_op *insn = (struct load_op *) pc; | |
1280 | struct field_ref *ref = (struct field_ref *) insn->data; | |
1281 | struct lttng_ctx_field *ctx_field; | |
1282 | union lttng_ctx_value v; | |
1283 | ||
1284 | dbg_printk("get context ref offset %u type s64\n", | |
1285 | ref->offset); | |
1286 | ctx_field = <tng_static_ctx->fields[ref->offset]; | |
79150a49 | 1287 | ctx_field->get_value(ctx_field, lttng_probe_ctx, &v); |
07dfc1d0 MD |
1288 | estack_push(stack, top, ax, bx); |
1289 | estack_ax_v = v.s64; | |
1290 | dbg_printk("ref get context s64 %lld\n", | |
1291 | (long long) estack_ax_v); | |
1292 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
1293 | PO; | |
1294 | } | |
1295 | ||
1296 | OP(FILTER_OP_GET_CONTEXT_REF_DOUBLE): | |
1297 | { | |
1298 | BUG_ON(1); | |
1299 | PO; | |
1300 | } | |
1301 | ||
f127e61e MD |
1302 | /* load userspace field ref */ |
1303 | OP(FILTER_OP_LOAD_FIELD_REF_USER_STRING): | |
1304 | { | |
1305 | struct load_op *insn = (struct load_op *) pc; | |
1306 | struct field_ref *ref = (struct field_ref *) insn->data; | |
1307 | ||
1308 | dbg_printk("load field ref offset %u type user string\n", | |
1309 | ref->offset); | |
1310 | estack_push(stack, top, ax, bx); | |
5b4ad89f | 1311 | estack_ax(stack, top)->u.s.user_str = |
f127e61e MD |
1312 | *(const char * const *) &filter_stack_data[ref->offset]; |
1313 | if (unlikely(!estack_ax(stack, top)->u.s.str)) { | |
1314 | dbg_printk("Filter warning: loading a NULL string.\n"); | |
1315 | ret = -EINVAL; | |
1316 | goto end; | |
1317 | } | |
cbc19040 | 1318 | estack_ax(stack, top)->u.s.seq_len = LTTNG_SIZE_MAX; |
02aca193 PP |
1319 | estack_ax(stack, top)->u.s.literal_type = |
1320 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
f127e61e MD |
1321 | estack_ax(stack, top)->u.s.user = 1; |
1322 | dbg_printk("ref load string %s\n", estack_ax(stack, top)->u.s.str); | |
1323 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
1324 | PO; | |
1325 | } | |
1326 | ||
1327 | OP(FILTER_OP_LOAD_FIELD_REF_USER_SEQUENCE): | |
1328 | { | |
1329 | struct load_op *insn = (struct load_op *) pc; | |
1330 | struct field_ref *ref = (struct field_ref *) insn->data; | |
1331 | ||
1332 | dbg_printk("load field ref offset %u type user sequence\n", | |
1333 | ref->offset); | |
1334 | estack_push(stack, top, ax, bx); | |
1335 | estack_ax(stack, top)->u.s.seq_len = | |
1336 | *(unsigned long *) &filter_stack_data[ref->offset]; | |
5b4ad89f | 1337 | estack_ax(stack, top)->u.s.user_str = |
f127e61e MD |
1338 | *(const char **) (&filter_stack_data[ref->offset |
1339 | + sizeof(unsigned long)]); | |
1340 | if (unlikely(!estack_ax(stack, top)->u.s.str)) { | |
1341 | dbg_printk("Filter warning: loading a NULL sequence.\n"); | |
1342 | ret = -EINVAL; | |
1343 | goto end; | |
1344 | } | |
02aca193 PP |
1345 | estack_ax(stack, top)->u.s.literal_type = |
1346 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
f127e61e MD |
1347 | estack_ax(stack, top)->u.s.user = 1; |
1348 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
1349 | PO; | |
1350 | } | |
1351 | ||
3834b99f MD |
1352 | OP(FILTER_OP_GET_CONTEXT_ROOT): |
1353 | { | |
1354 | dbg_printk("op get context root\n"); | |
1355 | estack_push(stack, top, ax, bx); | |
1356 | estack_ax(stack, top)->u.ptr.type = LOAD_ROOT_CONTEXT; | |
1357 | /* "field" only needed for variants. */ | |
1358 | estack_ax(stack, top)->u.ptr.field = NULL; | |
1359 | next_pc += sizeof(struct load_op); | |
1360 | PO; | |
1361 | } | |
1362 | ||
1363 | OP(FILTER_OP_GET_APP_CONTEXT_ROOT): | |
1364 | { | |
1365 | BUG_ON(1); | |
1366 | PO; | |
1367 | } | |
1368 | ||
1369 | OP(FILTER_OP_GET_PAYLOAD_ROOT): | |
1370 | { | |
1371 | dbg_printk("op get app payload root\n"); | |
1372 | estack_push(stack, top, ax, bx); | |
1373 | estack_ax(stack, top)->u.ptr.type = LOAD_ROOT_PAYLOAD; | |
1374 | estack_ax(stack, top)->u.ptr.ptr = filter_stack_data; | |
1375 | /* "field" only needed for variants. */ | |
1376 | estack_ax(stack, top)->u.ptr.field = NULL; | |
1377 | next_pc += sizeof(struct load_op); | |
1378 | PO; | |
1379 | } | |
1380 | ||
1381 | OP(FILTER_OP_GET_SYMBOL): | |
1382 | { | |
1383 | dbg_printk("op get symbol\n"); | |
1384 | switch (estack_ax(stack, top)->u.ptr.type) { | |
1385 | case LOAD_OBJECT: | |
5a15f70c | 1386 | printk(KERN_WARNING "LTTng: filter: Nested fields not implemented yet.\n"); |
3834b99f MD |
1387 | ret = -EINVAL; |
1388 | goto end; | |
1389 | case LOAD_ROOT_CONTEXT: | |
1390 | case LOAD_ROOT_APP_CONTEXT: | |
1391 | case LOAD_ROOT_PAYLOAD: | |
1392 | /* | |
1393 | * symbol lookup is performed by | |
1394 | * specialization. | |
1395 | */ | |
1396 | ret = -EINVAL; | |
1397 | goto end; | |
1398 | } | |
1399 | next_pc += sizeof(struct load_op) + sizeof(struct get_symbol); | |
1400 | PO; | |
1401 | } | |
1402 | ||
1403 | OP(FILTER_OP_GET_SYMBOL_FIELD): | |
1404 | { | |
1405 | /* | |
1406 | * Used for first variant encountered in a | |
1407 | * traversal. Variants are not implemented yet. | |
1408 | */ | |
1409 | ret = -EINVAL; | |
1410 | goto end; | |
1411 | } | |
1412 | ||
1413 | OP(FILTER_OP_GET_INDEX_U16): | |
1414 | { | |
1415 | struct load_op *insn = (struct load_op *) pc; | |
1416 | struct get_index_u16 *index = (struct get_index_u16 *) insn->data; | |
1417 | ||
1418 | dbg_printk("op get index u16\n"); | |
1419 | ret = dynamic_get_index(lttng_probe_ctx, bytecode, index->index, estack_ax(stack, top)); | |
1420 | if (ret) | |
1421 | goto end; | |
1422 | estack_ax_v = estack_ax(stack, top)->u.v; | |
1423 | next_pc += sizeof(struct load_op) + sizeof(struct get_index_u16); | |
1424 | PO; | |
1425 | } | |
1426 | ||
1427 | OP(FILTER_OP_GET_INDEX_U64): | |
1428 | { | |
1429 | struct load_op *insn = (struct load_op *) pc; | |
1430 | struct get_index_u64 *index = (struct get_index_u64 *) insn->data; | |
1431 | ||
1432 | dbg_printk("op get index u64\n"); | |
1433 | ret = dynamic_get_index(lttng_probe_ctx, bytecode, index->index, estack_ax(stack, top)); | |
1434 | if (ret) | |
1435 | goto end; | |
1436 | estack_ax_v = estack_ax(stack, top)->u.v; | |
1437 | next_pc += sizeof(struct load_op) + sizeof(struct get_index_u64); | |
1438 | PO; | |
1439 | } | |
1440 | ||
1441 | OP(FILTER_OP_LOAD_FIELD): | |
1442 | { | |
1443 | dbg_printk("op load field\n"); | |
1444 | ret = dynamic_load_field(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); | |
1449 | PO; | |
1450 | } | |
1451 | ||
1452 | OP(FILTER_OP_LOAD_FIELD_S8): | |
1453 | { | |
1454 | dbg_printk("op load field s8\n"); | |
1455 | ||
1456 | estack_ax_v = *(int8_t *) estack_ax(stack, top)->u.ptr.ptr; | |
1457 | next_pc += sizeof(struct load_op); | |
1458 | PO; | |
1459 | } | |
1460 | OP(FILTER_OP_LOAD_FIELD_S16): | |
1461 | { | |
1462 | dbg_printk("op load field s16\n"); | |
1463 | ||
1464 | estack_ax_v = *(int16_t *) estack_ax(stack, top)->u.ptr.ptr; | |
1465 | next_pc += sizeof(struct load_op); | |
1466 | PO; | |
1467 | } | |
1468 | OP(FILTER_OP_LOAD_FIELD_S32): | |
1469 | { | |
1470 | dbg_printk("op load field s32\n"); | |
1471 | ||
1472 | estack_ax_v = *(int32_t *) estack_ax(stack, top)->u.ptr.ptr; | |
1473 | next_pc += sizeof(struct load_op); | |
1474 | PO; | |
1475 | } | |
1476 | OP(FILTER_OP_LOAD_FIELD_S64): | |
1477 | { | |
1478 | dbg_printk("op load field s64\n"); | |
1479 | ||
1480 | estack_ax_v = *(int64_t *) estack_ax(stack, top)->u.ptr.ptr; | |
1481 | next_pc += sizeof(struct load_op); | |
1482 | PO; | |
1483 | } | |
1484 | OP(FILTER_OP_LOAD_FIELD_U8): | |
1485 | { | |
1486 | dbg_printk("op load field u8\n"); | |
1487 | ||
1488 | estack_ax_v = *(uint8_t *) estack_ax(stack, top)->u.ptr.ptr; | |
1489 | next_pc += sizeof(struct load_op); | |
1490 | PO; | |
1491 | } | |
1492 | OP(FILTER_OP_LOAD_FIELD_U16): | |
1493 | { | |
1494 | dbg_printk("op load field u16\n"); | |
1495 | ||
1496 | estack_ax_v = *(uint16_t *) estack_ax(stack, top)->u.ptr.ptr; | |
1497 | next_pc += sizeof(struct load_op); | |
1498 | PO; | |
1499 | } | |
1500 | OP(FILTER_OP_LOAD_FIELD_U32): | |
1501 | { | |
1502 | dbg_printk("op load field u32\n"); | |
1503 | ||
1504 | estack_ax_v = *(uint32_t *) estack_ax(stack, top)->u.ptr.ptr; | |
1505 | next_pc += sizeof(struct load_op); | |
1506 | PO; | |
1507 | } | |
1508 | OP(FILTER_OP_LOAD_FIELD_U64): | |
1509 | { | |
1510 | dbg_printk("op load field u64\n"); | |
1511 | ||
1512 | estack_ax_v = *(uint64_t *) estack_ax(stack, top)->u.ptr.ptr; | |
1513 | next_pc += sizeof(struct load_op); | |
1514 | PO; | |
1515 | } | |
1516 | OP(FILTER_OP_LOAD_FIELD_DOUBLE): | |
1517 | { | |
1518 | ret = -EINVAL; | |
1519 | goto end; | |
1520 | } | |
1521 | ||
1522 | OP(FILTER_OP_LOAD_FIELD_STRING): | |
1523 | { | |
1524 | const char *str; | |
1525 | ||
1526 | dbg_printk("op load field string\n"); | |
1527 | str = (const char *) estack_ax(stack, top)->u.ptr.ptr; | |
1528 | estack_ax(stack, top)->u.s.str = str; | |
1529 | if (unlikely(!estack_ax(stack, top)->u.s.str)) { | |
1530 | dbg_printk("Filter warning: loading a NULL string.\n"); | |
1531 | ret = -EINVAL; | |
1532 | goto end; | |
1533 | } | |
4efe037b | 1534 | estack_ax(stack, top)->u.s.seq_len = LTTNG_SIZE_MAX; |
3834b99f MD |
1535 | estack_ax(stack, top)->u.s.literal_type = |
1536 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
1537 | next_pc += sizeof(struct load_op); | |
1538 | PO; | |
1539 | } | |
1540 | ||
1541 | OP(FILTER_OP_LOAD_FIELD_SEQUENCE): | |
1542 | { | |
1543 | const char *ptr; | |
1544 | ||
1545 | dbg_printk("op load field string sequence\n"); | |
1546 | ptr = estack_ax(stack, top)->u.ptr.ptr; | |
1547 | estack_ax(stack, top)->u.s.seq_len = *(unsigned long *) ptr; | |
1548 | estack_ax(stack, top)->u.s.str = *(const char **) (ptr + sizeof(unsigned long)); | |
1549 | if (unlikely(!estack_ax(stack, top)->u.s.str)) { | |
1550 | dbg_printk("Filter warning: loading a NULL sequence.\n"); | |
1551 | ret = -EINVAL; | |
1552 | goto end; | |
1553 | } | |
1554 | estack_ax(stack, top)->u.s.literal_type = | |
1555 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
1556 | next_pc += sizeof(struct load_op); | |
1557 | PO; | |
1558 | } | |
1559 | ||
07dfc1d0 MD |
1560 | END_OP |
1561 | end: | |
a93d4e71 | 1562 | /* Return _DISCARD on error. */ |
07dfc1d0 | 1563 | if (ret) |
a93d4e71 | 1564 | return LTTNG_FILTER_DISCARD; |
07dfc1d0 MD |
1565 | return retval; |
1566 | } | |
1567 | ||
1568 | #undef START_OP | |
1569 | #undef OP | |
1570 | #undef PO | |
1571 | #undef END_OP |