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 | ||
1d00109f | 10 | #include <wrapper/compiler_attributes.h> |
80bb2600 | 11 | #include <wrapper/uaccess.h> |
37b9cb0e | 12 | #include <wrapper/objtool.h> |
cbc19040 | 13 | #include <wrapper/types.h> |
3834b99f | 14 | #include <linux/swab.h> |
f127e61e | 15 | |
241ae9a8 | 16 | #include <lttng-filter.h> |
02aca193 | 17 | #include <lttng-string-utils.h> |
07dfc1d0 | 18 | |
63155590 MD |
19 | LTTNG_STACK_FRAME_NON_STANDARD(lttng_filter_interpret_bytecode); |
20 | ||
f127e61e MD |
21 | /* |
22 | * get_char should be called with page fault handler disabled if it is expected | |
23 | * to handle user-space read. | |
24 | */ | |
25 | static | |
23a2f61f | 26 | char get_char(const struct estack_entry *reg, size_t offset) |
f127e61e MD |
27 | { |
28 | if (unlikely(offset >= reg->u.s.seq_len)) | |
29 | return '\0'; | |
30 | if (reg->u.s.user) { | |
31 | char c; | |
32 | ||
33 | /* Handle invalid access as end of string. */ | |
80bb2600 | 34 | if (unlikely(!lttng_access_ok(VERIFY_READ, |
f127e61e MD |
35 | reg->u.s.user_str + offset, |
36 | sizeof(c)))) | |
37 | return '\0'; | |
38 | /* Handle fault (nonzero return value) as end of string. */ | |
39 | if (unlikely(__copy_from_user_inatomic(&c, | |
40 | reg->u.s.user_str + offset, | |
41 | sizeof(c)))) | |
42 | return '\0'; | |
43 | return c; | |
44 | } else { | |
45 | return reg->u.s.str[offset]; | |
46 | } | |
47 | } | |
48 | ||
07dfc1d0 MD |
49 | /* |
50 | * -1: wildcard found. | |
51 | * -2: unknown escape char. | |
52 | * 0: normal char. | |
53 | */ | |
07dfc1d0 | 54 | static |
f127e61e | 55 | int parse_char(struct estack_entry *reg, char *c, size_t *offset) |
07dfc1d0 | 56 | { |
f127e61e | 57 | switch (*c) { |
07dfc1d0 | 58 | case '\\': |
f127e61e MD |
59 | (*offset)++; |
60 | *c = get_char(reg, *offset); | |
61 | switch (*c) { | |
07dfc1d0 MD |
62 | case '\\': |
63 | case '*': | |
64 | return 0; | |
65 | default: | |
66 | return -2; | |
67 | } | |
68 | case '*': | |
69 | return -1; | |
70 | default: | |
71 | return 0; | |
72 | } | |
73 | } | |
74 | ||
02aca193 PP |
75 | static |
76 | char get_char_at_cb(size_t at, void *data) | |
77 | { | |
78 | return get_char(data, at); | |
79 | } | |
80 | ||
81 | static | |
82 | int stack_star_glob_match(struct estack *stack, int top, const char *cmp_type) | |
83 | { | |
84 | bool has_user = false; | |
02aca193 PP |
85 | int result; |
86 | struct estack_entry *pattern_reg; | |
87 | struct estack_entry *candidate_reg; | |
88 | ||
6f9e33ea | 89 | /* Disable the page fault handler when reading from userspace. */ |
02aca193 PP |
90 | if (estack_bx(stack, top)->u.s.user |
91 | || estack_ax(stack, top)->u.s.user) { | |
92 | has_user = true; | |
02aca193 PP |
93 | pagefault_disable(); |
94 | } | |
95 | ||
96 | /* Find out which side is the pattern vs. the candidate. */ | |
97 | if (estack_ax(stack, top)->u.s.literal_type == ESTACK_STRING_LITERAL_TYPE_STAR_GLOB) { | |
98 | pattern_reg = estack_ax(stack, top); | |
99 | candidate_reg = estack_bx(stack, top); | |
100 | } else { | |
101 | pattern_reg = estack_bx(stack, top); | |
102 | candidate_reg = estack_ax(stack, top); | |
103 | } | |
104 | ||
105 | /* Perform the match operation. */ | |
106 | result = !strutils_star_glob_match_char_cb(get_char_at_cb, | |
107 | pattern_reg, get_char_at_cb, candidate_reg); | |
6f9e33ea | 108 | if (has_user) |
02aca193 | 109 | pagefault_enable(); |
02aca193 PP |
110 | |
111 | return result; | |
112 | } | |
113 | ||
07dfc1d0 MD |
114 | static |
115 | int stack_strcmp(struct estack *stack, int top, const char *cmp_type) | |
116 | { | |
f127e61e MD |
117 | size_t offset_bx = 0, offset_ax = 0; |
118 | int diff, has_user = 0; | |
f127e61e MD |
119 | |
120 | if (estack_bx(stack, top)->u.s.user | |
121 | || estack_ax(stack, top)->u.s.user) { | |
122 | has_user = 1; | |
f127e61e MD |
123 | pagefault_disable(); |
124 | } | |
07dfc1d0 MD |
125 | |
126 | for (;;) { | |
f127e61e | 127 | int ret; |
07dfc1d0 | 128 | int escaped_r0 = 0; |
f127e61e | 129 | char char_bx, char_ax; |
07dfc1d0 | 130 | |
f127e61e MD |
131 | char_bx = get_char(estack_bx(stack, top), offset_bx); |
132 | char_ax = get_char(estack_ax(stack, top), offset_ax); | |
133 | ||
134 | if (unlikely(char_bx == '\0')) { | |
135 | if (char_ax == '\0') { | |
136 | diff = 0; | |
137 | break; | |
07dfc1d0 | 138 | } else { |
02aca193 PP |
139 | if (estack_ax(stack, top)->u.s.literal_type == |
140 | ESTACK_STRING_LITERAL_TYPE_PLAIN) { | |
f127e61e MD |
141 | ret = parse_char(estack_ax(stack, top), |
142 | &char_ax, &offset_ax); | |
143 | if (ret == -1) { | |
144 | diff = 0; | |
145 | break; | |
146 | } | |
07dfc1d0 | 147 | } |
f127e61e MD |
148 | diff = -1; |
149 | break; | |
07dfc1d0 MD |
150 | } |
151 | } | |
f127e61e | 152 | if (unlikely(char_ax == '\0')) { |
02aca193 PP |
153 | if (estack_bx(stack, top)->u.s.literal_type == |
154 | ESTACK_STRING_LITERAL_TYPE_PLAIN) { | |
abfd272b MD |
155 | ret = parse_char(estack_bx(stack, top), |
156 | &char_bx, &offset_bx); | |
157 | if (ret == -1) { | |
158 | diff = 0; | |
159 | break; | |
07dfc1d0 | 160 | } |
07dfc1d0 | 161 | } |
abfd272b MD |
162 | diff = 1; |
163 | break; | |
07dfc1d0 | 164 | } |
02aca193 PP |
165 | if (estack_bx(stack, top)->u.s.literal_type == |
166 | ESTACK_STRING_LITERAL_TYPE_PLAIN) { | |
f127e61e MD |
167 | ret = parse_char(estack_bx(stack, top), |
168 | &char_bx, &offset_bx); | |
07dfc1d0 | 169 | if (ret == -1) { |
f127e61e MD |
170 | diff = 0; |
171 | break; | |
07dfc1d0 MD |
172 | } else if (ret == -2) { |
173 | escaped_r0 = 1; | |
174 | } | |
175 | /* else compare both char */ | |
176 | } | |
02aca193 PP |
177 | if (estack_ax(stack, top)->u.s.literal_type == |
178 | ESTACK_STRING_LITERAL_TYPE_PLAIN) { | |
f127e61e MD |
179 | ret = parse_char(estack_ax(stack, top), |
180 | &char_ax, &offset_ax); | |
07dfc1d0 | 181 | if (ret == -1) { |
f127e61e MD |
182 | diff = 0; |
183 | break; | |
07dfc1d0 | 184 | } else if (ret == -2) { |
f127e61e MD |
185 | if (!escaped_r0) { |
186 | diff = -1; | |
187 | break; | |
188 | } | |
07dfc1d0 | 189 | } else { |
f127e61e MD |
190 | if (escaped_r0) { |
191 | diff = 1; | |
192 | break; | |
193 | } | |
07dfc1d0 MD |
194 | } |
195 | } else { | |
f127e61e MD |
196 | if (escaped_r0) { |
197 | diff = 1; | |
198 | break; | |
199 | } | |
07dfc1d0 | 200 | } |
f127e61e | 201 | diff = char_bx - char_ax; |
07dfc1d0 MD |
202 | if (diff != 0) |
203 | break; | |
f127e61e MD |
204 | offset_bx++; |
205 | offset_ax++; | |
206 | } | |
6f9e33ea | 207 | if (has_user) |
f127e61e | 208 | pagefault_enable(); |
6f9e33ea | 209 | |
07dfc1d0 MD |
210 | return diff; |
211 | } | |
212 | ||
213 | uint64_t lttng_filter_false(void *filter_data, | |
79150a49 | 214 | struct lttng_probe_ctx *lttng_probe_ctx, |
07dfc1d0 MD |
215 | const char *filter_stack_data) |
216 | { | |
217 | return 0; | |
218 | } | |
219 | ||
220 | #ifdef INTERPRETER_USE_SWITCH | |
221 | ||
222 | /* | |
223 | * Fallback for compilers that do not support taking address of labels. | |
224 | */ | |
225 | ||
226 | #define START_OP \ | |
227 | start_pc = &bytecode->data[0]; \ | |
228 | for (pc = next_pc = start_pc; pc - start_pc < bytecode->len; \ | |
229 | pc = next_pc) { \ | |
230 | dbg_printk("Executing op %s (%u)\n", \ | |
231 | lttng_filter_print_op((unsigned int) *(filter_opcode_t *) pc), \ | |
232 | (unsigned int) *(filter_opcode_t *) pc); \ | |
233 | switch (*(filter_opcode_t *) pc) { | |
234 | ||
235 | #define OP(name) case name | |
236 | ||
237 | #define PO break | |
238 | ||
239 | #define END_OP } \ | |
240 | } | |
241 | ||
242 | #else | |
243 | ||
244 | /* | |
245 | * Dispatch-table based interpreter. | |
246 | */ | |
247 | ||
248 | #define START_OP \ | |
3834b99f | 249 | start_pc = &bytecode->code[0]; \ |
07dfc1d0 MD |
250 | pc = next_pc = start_pc; \ |
251 | if (unlikely(pc - start_pc >= bytecode->len)) \ | |
252 | goto end; \ | |
253 | goto *dispatch[*(filter_opcode_t *) pc]; | |
254 | ||
255 | #define OP(name) \ | |
256 | LABEL_##name | |
257 | ||
258 | #define PO \ | |
259 | pc = next_pc; \ | |
260 | goto *dispatch[*(filter_opcode_t *) pc]; | |
261 | ||
262 | #define END_OP | |
263 | ||
264 | #endif | |
265 | ||
3834b99f MD |
266 | static int context_get_index(struct lttng_probe_ctx *lttng_probe_ctx, |
267 | struct load_ptr *ptr, | |
268 | uint32_t idx) | |
269 | { | |
270 | ||
271 | struct lttng_ctx_field *ctx_field; | |
272 | struct lttng_event_field *field; | |
273 | union lttng_ctx_value v; | |
274 | ||
275 | ctx_field = <tng_static_ctx->fields[idx]; | |
276 | field = &ctx_field->event_field; | |
277 | ptr->type = LOAD_OBJECT; | |
278 | /* field is only used for types nested within variants. */ | |
279 | ptr->field = NULL; | |
280 | ||
281 | switch (field->type.atype) { | |
282 | case atype_integer: | |
283 | ctx_field->get_value(ctx_field, lttng_probe_ctx, &v); | |
284 | if (field->type.u.basic.integer.signedness) { | |
285 | ptr->object_type = OBJECT_TYPE_S64; | |
286 | ptr->u.s64 = v.s64; | |
287 | ptr->ptr = &ptr->u.s64; | |
288 | } else { | |
289 | ptr->object_type = OBJECT_TYPE_U64; | |
290 | ptr->u.u64 = v.s64; /* Cast. */ | |
291 | ptr->ptr = &ptr->u.u64; | |
292 | } | |
fd6f8c5b | 293 | ptr->rev_bo = field->type.u.basic.integer.reverse_byte_order; |
3834b99f MD |
294 | break; |
295 | case atype_enum: | |
296 | { | |
297 | const struct lttng_integer_type *itype = | |
298 | &field->type.u.basic.enumeration.container_type; | |
299 | ||
300 | ctx_field->get_value(ctx_field, lttng_probe_ctx, &v); | |
301 | if (itype->signedness) { | |
302 | ptr->object_type = OBJECT_TYPE_S64; | |
303 | ptr->u.s64 = v.s64; | |
304 | ptr->ptr = &ptr->u.s64; | |
305 | } else { | |
306 | ptr->object_type = OBJECT_TYPE_U64; | |
307 | ptr->u.u64 = v.s64; /* Cast. */ | |
308 | ptr->ptr = &ptr->u.u64; | |
309 | } | |
fd6f8c5b | 310 | ptr->rev_bo = itype->reverse_byte_order; |
3834b99f MD |
311 | break; |
312 | } | |
313 | case atype_array: | |
314 | if (field->type.u.array.elem_type.atype != atype_integer) { | |
315 | printk(KERN_WARNING "Array nesting only supports integer types.\n"); | |
316 | return -EINVAL; | |
317 | } | |
318 | if (field->type.u.array.elem_type.u.basic.integer.encoding == lttng_encode_none) { | |
319 | printk(KERN_WARNING "Only string arrays are supported for contexts.\n"); | |
320 | return -EINVAL; | |
321 | } | |
322 | ptr->object_type = OBJECT_TYPE_STRING; | |
323 | ctx_field->get_value(ctx_field, lttng_probe_ctx, &v); | |
324 | ptr->ptr = v.str; | |
325 | break; | |
326 | case atype_sequence: | |
327 | if (field->type.u.sequence.elem_type.atype != atype_integer) { | |
328 | printk(KERN_WARNING "Sequence nesting only supports integer types.\n"); | |
329 | return -EINVAL; | |
330 | } | |
331 | if (field->type.u.sequence.elem_type.u.basic.integer.encoding == lttng_encode_none) { | |
332 | printk(KERN_WARNING "Only string sequences are supported for contexts.\n"); | |
333 | return -EINVAL; | |
334 | } | |
335 | ptr->object_type = OBJECT_TYPE_STRING; | |
336 | ctx_field->get_value(ctx_field, lttng_probe_ctx, &v); | |
337 | ptr->ptr = v.str; | |
338 | break; | |
339 | case atype_array_bitfield: | |
340 | printk(KERN_WARNING "Bitfield array type is not supported.\n"); | |
341 | return -EINVAL; | |
342 | case atype_sequence_bitfield: | |
343 | printk(KERN_WARNING "Bitfield sequence type is not supported.\n"); | |
344 | return -EINVAL; | |
345 | case atype_string: | |
346 | ptr->object_type = OBJECT_TYPE_STRING; | |
347 | ctx_field->get_value(ctx_field, lttng_probe_ctx, &v); | |
348 | ptr->ptr = v.str; | |
349 | break; | |
350 | case atype_struct: | |
351 | printk(KERN_WARNING "Structure type cannot be loaded.\n"); | |
352 | return -EINVAL; | |
353 | default: | |
354 | printk(KERN_WARNING "Unknown type: %d", (int) field->type.atype); | |
355 | return -EINVAL; | |
356 | } | |
357 | return 0; | |
358 | } | |
359 | ||
360 | static int dynamic_get_index(struct lttng_probe_ctx *lttng_probe_ctx, | |
361 | struct bytecode_runtime *runtime, | |
362 | uint64_t index, struct estack_entry *stack_top) | |
363 | { | |
364 | int ret; | |
365 | const struct filter_get_index_data *gid; | |
366 | ||
367 | /* | |
368 | * Types nested within variants need to perform dynamic lookup | |
369 | * based on the field descriptions. LTTng-UST does not implement | |
370 | * variants for now. | |
371 | */ | |
372 | if (stack_top->u.ptr.field) | |
373 | return -EINVAL; | |
374 | gid = (const struct filter_get_index_data *) &runtime->data[index]; | |
375 | switch (stack_top->u.ptr.type) { | |
376 | case LOAD_OBJECT: | |
377 | switch (stack_top->u.ptr.object_type) { | |
378 | case OBJECT_TYPE_ARRAY: | |
379 | { | |
380 | const char *ptr; | |
381 | ||
382 | WARN_ON_ONCE(gid->offset >= gid->array_len); | |
383 | /* Skip count (unsigned long) */ | |
384 | ptr = *(const char **) (stack_top->u.ptr.ptr + sizeof(unsigned long)); | |
385 | ptr = ptr + gid->offset; | |
386 | stack_top->u.ptr.ptr = ptr; | |
387 | stack_top->u.ptr.object_type = gid->elem.type; | |
388 | stack_top->u.ptr.rev_bo = gid->elem.rev_bo; | |
389 | /* field is only used for types nested within variants. */ | |
390 | stack_top->u.ptr.field = NULL; | |
391 | break; | |
392 | } | |
393 | case OBJECT_TYPE_SEQUENCE: | |
394 | { | |
395 | const char *ptr; | |
396 | size_t ptr_seq_len; | |
397 | ||
398 | ptr = *(const char **) (stack_top->u.ptr.ptr + sizeof(unsigned long)); | |
399 | ptr_seq_len = *(unsigned long *) stack_top->u.ptr.ptr; | |
400 | if (gid->offset >= gid->elem.len * ptr_seq_len) { | |
401 | ret = -EINVAL; | |
402 | goto end; | |
403 | } | |
404 | ptr = ptr + gid->offset; | |
405 | stack_top->u.ptr.ptr = ptr; | |
406 | stack_top->u.ptr.object_type = gid->elem.type; | |
407 | stack_top->u.ptr.rev_bo = gid->elem.rev_bo; | |
408 | /* field is only used for types nested within variants. */ | |
409 | stack_top->u.ptr.field = NULL; | |
410 | break; | |
411 | } | |
412 | case OBJECT_TYPE_STRUCT: | |
413 | printk(KERN_WARNING "Nested structures are not supported yet.\n"); | |
414 | ret = -EINVAL; | |
415 | goto end; | |
416 | case OBJECT_TYPE_VARIANT: | |
417 | default: | |
418 | printk(KERN_WARNING "Unexpected get index type %d", | |
419 | (int) stack_top->u.ptr.object_type); | |
420 | ret = -EINVAL; | |
421 | goto end; | |
422 | } | |
423 | break; | |
424 | case LOAD_ROOT_CONTEXT: | |
1d00109f MJ |
425 | lttng_fallthrough; |
426 | case LOAD_ROOT_APP_CONTEXT: | |
3834b99f MD |
427 | { |
428 | ret = context_get_index(lttng_probe_ctx, | |
429 | &stack_top->u.ptr, | |
430 | gid->ctx_index); | |
431 | if (ret) { | |
432 | goto end; | |
433 | } | |
434 | break; | |
435 | } | |
436 | case LOAD_ROOT_PAYLOAD: | |
437 | stack_top->u.ptr.ptr += gid->offset; | |
438 | if (gid->elem.type == OBJECT_TYPE_STRING) | |
439 | stack_top->u.ptr.ptr = *(const char * const *) stack_top->u.ptr.ptr; | |
440 | stack_top->u.ptr.object_type = gid->elem.type; | |
441 | stack_top->u.ptr.type = LOAD_OBJECT; | |
442 | /* field is only used for types nested within variants. */ | |
443 | stack_top->u.ptr.field = NULL; | |
31afaf8b | 444 | stack_top->u.ptr.rev_bo = gid->elem.rev_bo; |
3834b99f MD |
445 | break; |
446 | } | |
447 | return 0; | |
448 | ||
449 | end: | |
450 | return ret; | |
451 | } | |
452 | ||
453 | static int dynamic_load_field(struct estack_entry *stack_top) | |
454 | { | |
455 | int ret; | |
456 | ||
457 | switch (stack_top->u.ptr.type) { | |
458 | case LOAD_OBJECT: | |
459 | break; | |
460 | case LOAD_ROOT_CONTEXT: | |
461 | case LOAD_ROOT_APP_CONTEXT: | |
462 | case LOAD_ROOT_PAYLOAD: | |
463 | default: | |
464 | dbg_printk("Filter warning: cannot load root, missing field name.\n"); | |
465 | ret = -EINVAL; | |
466 | goto end; | |
467 | } | |
468 | switch (stack_top->u.ptr.object_type) { | |
469 | case OBJECT_TYPE_S8: | |
470 | dbg_printk("op load field s8\n"); | |
471 | stack_top->u.v = *(int8_t *) stack_top->u.ptr.ptr; | |
472 | break; | |
473 | case OBJECT_TYPE_S16: | |
474 | { | |
475 | int16_t tmp; | |
476 | ||
477 | dbg_printk("op load field s16\n"); | |
478 | tmp = *(int16_t *) stack_top->u.ptr.ptr; | |
479 | if (stack_top->u.ptr.rev_bo) | |
480 | __swab16s(&tmp); | |
481 | stack_top->u.v = tmp; | |
482 | break; | |
483 | } | |
484 | case OBJECT_TYPE_S32: | |
485 | { | |
486 | int32_t tmp; | |
487 | ||
488 | dbg_printk("op load field s32\n"); | |
489 | tmp = *(int32_t *) stack_top->u.ptr.ptr; | |
490 | if (stack_top->u.ptr.rev_bo) | |
491 | __swab32s(&tmp); | |
492 | stack_top->u.v = tmp; | |
493 | break; | |
494 | } | |
495 | case OBJECT_TYPE_S64: | |
496 | { | |
497 | int64_t tmp; | |
498 | ||
499 | dbg_printk("op load field s64\n"); | |
500 | tmp = *(int64_t *) stack_top->u.ptr.ptr; | |
501 | if (stack_top->u.ptr.rev_bo) | |
502 | __swab64s(&tmp); | |
503 | stack_top->u.v = tmp; | |
504 | break; | |
505 | } | |
506 | case OBJECT_TYPE_U8: | |
507 | dbg_printk("op load field u8\n"); | |
508 | stack_top->u.v = *(uint8_t *) stack_top->u.ptr.ptr; | |
509 | break; | |
510 | case OBJECT_TYPE_U16: | |
511 | { | |
512 | uint16_t tmp; | |
513 | ||
514 | dbg_printk("op load field s16\n"); | |
515 | tmp = *(uint16_t *) stack_top->u.ptr.ptr; | |
516 | if (stack_top->u.ptr.rev_bo) | |
517 | __swab16s(&tmp); | |
518 | stack_top->u.v = tmp; | |
519 | break; | |
520 | } | |
521 | case OBJECT_TYPE_U32: | |
522 | { | |
523 | uint32_t tmp; | |
524 | ||
525 | dbg_printk("op load field u32\n"); | |
526 | tmp = *(uint32_t *) stack_top->u.ptr.ptr; | |
527 | if (stack_top->u.ptr.rev_bo) | |
528 | __swab32s(&tmp); | |
529 | stack_top->u.v = tmp; | |
530 | break; | |
531 | } | |
532 | case OBJECT_TYPE_U64: | |
533 | { | |
534 | uint64_t tmp; | |
535 | ||
536 | dbg_printk("op load field u64\n"); | |
537 | tmp = *(uint64_t *) stack_top->u.ptr.ptr; | |
538 | if (stack_top->u.ptr.rev_bo) | |
539 | __swab64s(&tmp); | |
540 | stack_top->u.v = tmp; | |
541 | break; | |
542 | } | |
543 | case OBJECT_TYPE_STRING: | |
544 | { | |
545 | const char *str; | |
546 | ||
547 | dbg_printk("op load field string\n"); | |
548 | str = (const char *) stack_top->u.ptr.ptr; | |
549 | stack_top->u.s.str = str; | |
550 | if (unlikely(!stack_top->u.s.str)) { | |
551 | dbg_printk("Filter warning: loading a NULL string.\n"); | |
552 | ret = -EINVAL; | |
553 | goto end; | |
554 | } | |
4efe037b | 555 | stack_top->u.s.seq_len = LTTNG_SIZE_MAX; |
3834b99f MD |
556 | stack_top->u.s.literal_type = |
557 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
558 | break; | |
559 | } | |
560 | case OBJECT_TYPE_STRING_SEQUENCE: | |
561 | { | |
562 | const char *ptr; | |
563 | ||
564 | dbg_printk("op load field string sequence\n"); | |
565 | ptr = stack_top->u.ptr.ptr; | |
566 | stack_top->u.s.seq_len = *(unsigned long *) ptr; | |
567 | stack_top->u.s.str = *(const char **) (ptr + sizeof(unsigned long)); | |
568 | if (unlikely(!stack_top->u.s.str)) { | |
569 | dbg_printk("Filter warning: loading a NULL sequence.\n"); | |
570 | ret = -EINVAL; | |
571 | goto end; | |
572 | } | |
573 | stack_top->u.s.literal_type = | |
574 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
575 | break; | |
576 | } | |
577 | case OBJECT_TYPE_DYNAMIC: | |
578 | /* | |
579 | * Dynamic types in context are looked up | |
580 | * by context get index. | |
581 | */ | |
582 | ret = -EINVAL; | |
583 | goto end; | |
584 | case OBJECT_TYPE_DOUBLE: | |
585 | ret = -EINVAL; | |
586 | goto end; | |
587 | case OBJECT_TYPE_SEQUENCE: | |
588 | case OBJECT_TYPE_ARRAY: | |
589 | case OBJECT_TYPE_STRUCT: | |
590 | case OBJECT_TYPE_VARIANT: | |
591 | printk(KERN_WARNING "Sequences, arrays, struct and variant cannot be loaded (nested types).\n"); | |
592 | ret = -EINVAL; | |
593 | goto end; | |
594 | } | |
595 | return 0; | |
596 | ||
597 | end: | |
598 | return ret; | |
599 | } | |
600 | ||
23a2f61f JG |
601 | #ifdef DEBUG |
602 | ||
603 | #define DBG_USER_STR_CUTOFF 32 | |
604 | ||
605 | /* | |
606 | * In debug mode, print user string (truncated, if necessary). | |
607 | */ | |
608 | static inline | |
609 | void dbg_load_ref_user_str_printk(const struct estack_entry *user_str_reg) | |
610 | { | |
611 | size_t pos = 0; | |
612 | char last_char; | |
613 | char user_str[DBG_USER_STR_CUTOFF]; | |
614 | ||
615 | pagefault_disable(); | |
616 | do { | |
617 | last_char = get_char(user_str_reg, pos); | |
618 | user_str[pos] = last_char; | |
619 | pos++; | |
620 | } while (last_char != '\0' && pos < sizeof(user_str)); | |
621 | pagefault_enable(); | |
622 | ||
623 | user_str[sizeof(user_str) - 1] = '\0'; | |
624 | dbg_printk("load field ref user string: '%s%s'\n", user_str, | |
625 | last_char != '\0' ? "[...]" : ""); | |
626 | } | |
627 | #else | |
628 | static inline | |
629 | void dbg_load_ref_user_str_printk(const struct estack_entry *user_str_reg) | |
630 | { | |
631 | } | |
632 | #endif | |
633 | ||
07dfc1d0 MD |
634 | /* |
635 | * Return 0 (discard), or raise the 0x1 flag (log event). | |
636 | * Currently, other flags are kept for future extensions and have no | |
637 | * effect. | |
638 | */ | |
639 | uint64_t lttng_filter_interpret_bytecode(void *filter_data, | |
79150a49 | 640 | struct lttng_probe_ctx *lttng_probe_ctx, |
07dfc1d0 MD |
641 | const char *filter_stack_data) |
642 | { | |
643 | struct bytecode_runtime *bytecode = filter_data; | |
644 | void *pc, *next_pc, *start_pc; | |
645 | int ret = -EINVAL; | |
646 | uint64_t retval = 0; | |
647 | struct estack _stack; | |
648 | struct estack *stack = &_stack; | |
649 | register int64_t ax = 0, bx = 0; | |
650 | register int top = FILTER_STACK_EMPTY; | |
651 | #ifndef INTERPRETER_USE_SWITCH | |
652 | static void *dispatch[NR_FILTER_OPS] = { | |
653 | [ FILTER_OP_UNKNOWN ] = &&LABEL_FILTER_OP_UNKNOWN, | |
654 | ||
655 | [ FILTER_OP_RETURN ] = &&LABEL_FILTER_OP_RETURN, | |
656 | ||
657 | /* binary */ | |
658 | [ FILTER_OP_MUL ] = &&LABEL_FILTER_OP_MUL, | |
659 | [ FILTER_OP_DIV ] = &&LABEL_FILTER_OP_DIV, | |
660 | [ FILTER_OP_MOD ] = &&LABEL_FILTER_OP_MOD, | |
661 | [ FILTER_OP_PLUS ] = &&LABEL_FILTER_OP_PLUS, | |
662 | [ FILTER_OP_MINUS ] = &&LABEL_FILTER_OP_MINUS, | |
e16c054b MD |
663 | [ FILTER_OP_BIT_RSHIFT ] = &&LABEL_FILTER_OP_BIT_RSHIFT, |
664 | [ FILTER_OP_BIT_LSHIFT ] = &&LABEL_FILTER_OP_BIT_LSHIFT, | |
3834b99f MD |
665 | [ FILTER_OP_BIT_AND ] = &&LABEL_FILTER_OP_BIT_AND, |
666 | [ FILTER_OP_BIT_OR ] = &&LABEL_FILTER_OP_BIT_OR, | |
667 | [ FILTER_OP_BIT_XOR ] = &&LABEL_FILTER_OP_BIT_XOR, | |
07dfc1d0 MD |
668 | |
669 | /* binary comparators */ | |
670 | [ FILTER_OP_EQ ] = &&LABEL_FILTER_OP_EQ, | |
671 | [ FILTER_OP_NE ] = &&LABEL_FILTER_OP_NE, | |
672 | [ FILTER_OP_GT ] = &&LABEL_FILTER_OP_GT, | |
673 | [ FILTER_OP_LT ] = &&LABEL_FILTER_OP_LT, | |
674 | [ FILTER_OP_GE ] = &&LABEL_FILTER_OP_GE, | |
675 | [ FILTER_OP_LE ] = &&LABEL_FILTER_OP_LE, | |
676 | ||
677 | /* string binary comparator */ | |
678 | [ FILTER_OP_EQ_STRING ] = &&LABEL_FILTER_OP_EQ_STRING, | |
679 | [ FILTER_OP_NE_STRING ] = &&LABEL_FILTER_OP_NE_STRING, | |
680 | [ FILTER_OP_GT_STRING ] = &&LABEL_FILTER_OP_GT_STRING, | |
681 | [ FILTER_OP_LT_STRING ] = &&LABEL_FILTER_OP_LT_STRING, | |
682 | [ FILTER_OP_GE_STRING ] = &&LABEL_FILTER_OP_GE_STRING, | |
683 | [ FILTER_OP_LE_STRING ] = &&LABEL_FILTER_OP_LE_STRING, | |
684 | ||
02aca193 PP |
685 | /* globbing pattern binary comparator */ |
686 | [ FILTER_OP_EQ_STAR_GLOB_STRING ] = &&LABEL_FILTER_OP_EQ_STAR_GLOB_STRING, | |
687 | [ FILTER_OP_NE_STAR_GLOB_STRING ] = &&LABEL_FILTER_OP_NE_STAR_GLOB_STRING, | |
688 | ||
07dfc1d0 MD |
689 | /* s64 binary comparator */ |
690 | [ FILTER_OP_EQ_S64 ] = &&LABEL_FILTER_OP_EQ_S64, | |
691 | [ FILTER_OP_NE_S64 ] = &&LABEL_FILTER_OP_NE_S64, | |
692 | [ FILTER_OP_GT_S64 ] = &&LABEL_FILTER_OP_GT_S64, | |
693 | [ FILTER_OP_LT_S64 ] = &&LABEL_FILTER_OP_LT_S64, | |
694 | [ FILTER_OP_GE_S64 ] = &&LABEL_FILTER_OP_GE_S64, | |
695 | [ FILTER_OP_LE_S64 ] = &&LABEL_FILTER_OP_LE_S64, | |
696 | ||
697 | /* double binary comparator */ | |
698 | [ FILTER_OP_EQ_DOUBLE ] = &&LABEL_FILTER_OP_EQ_DOUBLE, | |
699 | [ FILTER_OP_NE_DOUBLE ] = &&LABEL_FILTER_OP_NE_DOUBLE, | |
700 | [ FILTER_OP_GT_DOUBLE ] = &&LABEL_FILTER_OP_GT_DOUBLE, | |
701 | [ FILTER_OP_LT_DOUBLE ] = &&LABEL_FILTER_OP_LT_DOUBLE, | |
702 | [ FILTER_OP_GE_DOUBLE ] = &&LABEL_FILTER_OP_GE_DOUBLE, | |
703 | [ FILTER_OP_LE_DOUBLE ] = &&LABEL_FILTER_OP_LE_DOUBLE, | |
704 | ||
705 | /* Mixed S64-double binary comparators */ | |
706 | [ FILTER_OP_EQ_DOUBLE_S64 ] = &&LABEL_FILTER_OP_EQ_DOUBLE_S64, | |
707 | [ FILTER_OP_NE_DOUBLE_S64 ] = &&LABEL_FILTER_OP_NE_DOUBLE_S64, | |
708 | [ FILTER_OP_GT_DOUBLE_S64 ] = &&LABEL_FILTER_OP_GT_DOUBLE_S64, | |
709 | [ FILTER_OP_LT_DOUBLE_S64 ] = &&LABEL_FILTER_OP_LT_DOUBLE_S64, | |
710 | [ FILTER_OP_GE_DOUBLE_S64 ] = &&LABEL_FILTER_OP_GE_DOUBLE_S64, | |
711 | [ FILTER_OP_LE_DOUBLE_S64 ] = &&LABEL_FILTER_OP_LE_DOUBLE_S64, | |
712 | ||
713 | [ FILTER_OP_EQ_S64_DOUBLE ] = &&LABEL_FILTER_OP_EQ_S64_DOUBLE, | |
714 | [ FILTER_OP_NE_S64_DOUBLE ] = &&LABEL_FILTER_OP_NE_S64_DOUBLE, | |
715 | [ FILTER_OP_GT_S64_DOUBLE ] = &&LABEL_FILTER_OP_GT_S64_DOUBLE, | |
716 | [ FILTER_OP_LT_S64_DOUBLE ] = &&LABEL_FILTER_OP_LT_S64_DOUBLE, | |
717 | [ FILTER_OP_GE_S64_DOUBLE ] = &&LABEL_FILTER_OP_GE_S64_DOUBLE, | |
718 | [ FILTER_OP_LE_S64_DOUBLE ] = &&LABEL_FILTER_OP_LE_S64_DOUBLE, | |
719 | ||
720 | /* unary */ | |
721 | [ FILTER_OP_UNARY_PLUS ] = &&LABEL_FILTER_OP_UNARY_PLUS, | |
722 | [ FILTER_OP_UNARY_MINUS ] = &&LABEL_FILTER_OP_UNARY_MINUS, | |
723 | [ FILTER_OP_UNARY_NOT ] = &&LABEL_FILTER_OP_UNARY_NOT, | |
724 | [ FILTER_OP_UNARY_PLUS_S64 ] = &&LABEL_FILTER_OP_UNARY_PLUS_S64, | |
725 | [ FILTER_OP_UNARY_MINUS_S64 ] = &&LABEL_FILTER_OP_UNARY_MINUS_S64, | |
726 | [ FILTER_OP_UNARY_NOT_S64 ] = &&LABEL_FILTER_OP_UNARY_NOT_S64, | |
727 | [ FILTER_OP_UNARY_PLUS_DOUBLE ] = &&LABEL_FILTER_OP_UNARY_PLUS_DOUBLE, | |
728 | [ FILTER_OP_UNARY_MINUS_DOUBLE ] = &&LABEL_FILTER_OP_UNARY_MINUS_DOUBLE, | |
729 | [ FILTER_OP_UNARY_NOT_DOUBLE ] = &&LABEL_FILTER_OP_UNARY_NOT_DOUBLE, | |
730 | ||
731 | /* logical */ | |
732 | [ FILTER_OP_AND ] = &&LABEL_FILTER_OP_AND, | |
733 | [ FILTER_OP_OR ] = &&LABEL_FILTER_OP_OR, | |
734 | ||
735 | /* load field ref */ | |
736 | [ FILTER_OP_LOAD_FIELD_REF ] = &&LABEL_FILTER_OP_LOAD_FIELD_REF, | |
737 | [ FILTER_OP_LOAD_FIELD_REF_STRING ] = &&LABEL_FILTER_OP_LOAD_FIELD_REF_STRING, | |
738 | [ FILTER_OP_LOAD_FIELD_REF_SEQUENCE ] = &&LABEL_FILTER_OP_LOAD_FIELD_REF_SEQUENCE, | |
739 | [ FILTER_OP_LOAD_FIELD_REF_S64 ] = &&LABEL_FILTER_OP_LOAD_FIELD_REF_S64, | |
740 | [ FILTER_OP_LOAD_FIELD_REF_DOUBLE ] = &&LABEL_FILTER_OP_LOAD_FIELD_REF_DOUBLE, | |
741 | ||
742 | /* load from immediate operand */ | |
743 | [ FILTER_OP_LOAD_STRING ] = &&LABEL_FILTER_OP_LOAD_STRING, | |
02aca193 | 744 | [ FILTER_OP_LOAD_STAR_GLOB_STRING ] = &&LABEL_FILTER_OP_LOAD_STAR_GLOB_STRING, |
07dfc1d0 MD |
745 | [ FILTER_OP_LOAD_S64 ] = &&LABEL_FILTER_OP_LOAD_S64, |
746 | [ FILTER_OP_LOAD_DOUBLE ] = &&LABEL_FILTER_OP_LOAD_DOUBLE, | |
747 | ||
748 | /* cast */ | |
749 | [ FILTER_OP_CAST_TO_S64 ] = &&LABEL_FILTER_OP_CAST_TO_S64, | |
750 | [ FILTER_OP_CAST_DOUBLE_TO_S64 ] = &&LABEL_FILTER_OP_CAST_DOUBLE_TO_S64, | |
751 | [ FILTER_OP_CAST_NOP ] = &&LABEL_FILTER_OP_CAST_NOP, | |
752 | ||
753 | /* get context ref */ | |
754 | [ FILTER_OP_GET_CONTEXT_REF ] = &&LABEL_FILTER_OP_GET_CONTEXT_REF, | |
755 | [ FILTER_OP_GET_CONTEXT_REF_STRING ] = &&LABEL_FILTER_OP_GET_CONTEXT_REF_STRING, | |
756 | [ FILTER_OP_GET_CONTEXT_REF_S64 ] = &&LABEL_FILTER_OP_GET_CONTEXT_REF_S64, | |
757 | [ FILTER_OP_GET_CONTEXT_REF_DOUBLE ] = &&LABEL_FILTER_OP_GET_CONTEXT_REF_DOUBLE, | |
f127e61e MD |
758 | |
759 | /* load userspace field ref */ | |
760 | [ FILTER_OP_LOAD_FIELD_REF_USER_STRING ] = &&LABEL_FILTER_OP_LOAD_FIELD_REF_USER_STRING, | |
761 | [ FILTER_OP_LOAD_FIELD_REF_USER_SEQUENCE ] = &&LABEL_FILTER_OP_LOAD_FIELD_REF_USER_SEQUENCE, | |
3834b99f MD |
762 | |
763 | /* Instructions for recursive traversal through composed types. */ | |
764 | [ FILTER_OP_GET_CONTEXT_ROOT ] = &&LABEL_FILTER_OP_GET_CONTEXT_ROOT, | |
765 | [ FILTER_OP_GET_APP_CONTEXT_ROOT ] = &&LABEL_FILTER_OP_GET_APP_CONTEXT_ROOT, | |
766 | [ FILTER_OP_GET_PAYLOAD_ROOT ] = &&LABEL_FILTER_OP_GET_PAYLOAD_ROOT, | |
767 | ||
768 | [ FILTER_OP_GET_SYMBOL ] = &&LABEL_FILTER_OP_GET_SYMBOL, | |
769 | [ FILTER_OP_GET_SYMBOL_FIELD ] = &&LABEL_FILTER_OP_GET_SYMBOL_FIELD, | |
770 | [ FILTER_OP_GET_INDEX_U16 ] = &&LABEL_FILTER_OP_GET_INDEX_U16, | |
771 | [ FILTER_OP_GET_INDEX_U64 ] = &&LABEL_FILTER_OP_GET_INDEX_U64, | |
772 | ||
773 | [ FILTER_OP_LOAD_FIELD ] = &&LABEL_FILTER_OP_LOAD_FIELD, | |
774 | [ FILTER_OP_LOAD_FIELD_S8 ] = &&LABEL_FILTER_OP_LOAD_FIELD_S8, | |
775 | [ FILTER_OP_LOAD_FIELD_S16 ] = &&LABEL_FILTER_OP_LOAD_FIELD_S16, | |
776 | [ FILTER_OP_LOAD_FIELD_S32 ] = &&LABEL_FILTER_OP_LOAD_FIELD_S32, | |
777 | [ FILTER_OP_LOAD_FIELD_S64 ] = &&LABEL_FILTER_OP_LOAD_FIELD_S64, | |
778 | [ FILTER_OP_LOAD_FIELD_U8 ] = &&LABEL_FILTER_OP_LOAD_FIELD_U8, | |
779 | [ FILTER_OP_LOAD_FIELD_U16 ] = &&LABEL_FILTER_OP_LOAD_FIELD_U16, | |
780 | [ FILTER_OP_LOAD_FIELD_U32 ] = &&LABEL_FILTER_OP_LOAD_FIELD_U32, | |
781 | [ FILTER_OP_LOAD_FIELD_U64 ] = &&LABEL_FILTER_OP_LOAD_FIELD_U64, | |
782 | [ FILTER_OP_LOAD_FIELD_STRING ] = &&LABEL_FILTER_OP_LOAD_FIELD_STRING, | |
783 | [ FILTER_OP_LOAD_FIELD_SEQUENCE ] = &&LABEL_FILTER_OP_LOAD_FIELD_SEQUENCE, | |
784 | [ FILTER_OP_LOAD_FIELD_DOUBLE ] = &&LABEL_FILTER_OP_LOAD_FIELD_DOUBLE, | |
e16c054b MD |
785 | |
786 | [ FILTER_OP_UNARY_BIT_NOT ] = &&LABEL_FILTER_OP_UNARY_BIT_NOT, | |
57ba4b41 MD |
787 | |
788 | [ FILTER_OP_RETURN_S64 ] = &&LABEL_FILTER_OP_RETURN_S64, | |
07dfc1d0 MD |
789 | }; |
790 | #endif /* #ifndef INTERPRETER_USE_SWITCH */ | |
791 | ||
792 | START_OP | |
793 | ||
794 | OP(FILTER_OP_UNKNOWN): | |
795 | OP(FILTER_OP_LOAD_FIELD_REF): | |
796 | OP(FILTER_OP_GET_CONTEXT_REF): | |
797 | #ifdef INTERPRETER_USE_SWITCH | |
798 | default: | |
799 | #endif /* INTERPRETER_USE_SWITCH */ | |
800 | printk(KERN_WARNING "unknown bytecode op %u\n", | |
801 | (unsigned int) *(filter_opcode_t *) pc); | |
802 | ret = -EINVAL; | |
803 | goto end; | |
804 | ||
805 | OP(FILTER_OP_RETURN): | |
57ba4b41 | 806 | OP(FILTER_OP_RETURN_S64): |
07dfc1d0 MD |
807 | /* LTTNG_FILTER_DISCARD or LTTNG_FILTER_RECORD_FLAG */ |
808 | retval = !!estack_ax_v; | |
809 | ret = 0; | |
810 | goto end; | |
811 | ||
812 | /* binary */ | |
813 | OP(FILTER_OP_MUL): | |
814 | OP(FILTER_OP_DIV): | |
815 | OP(FILTER_OP_MOD): | |
816 | OP(FILTER_OP_PLUS): | |
817 | OP(FILTER_OP_MINUS): | |
07dfc1d0 MD |
818 | printk(KERN_WARNING "unsupported bytecode op %u\n", |
819 | (unsigned int) *(filter_opcode_t *) pc); | |
820 | ret = -EINVAL; | |
821 | goto end; | |
822 | ||
823 | OP(FILTER_OP_EQ): | |
824 | OP(FILTER_OP_NE): | |
825 | OP(FILTER_OP_GT): | |
826 | OP(FILTER_OP_LT): | |
827 | OP(FILTER_OP_GE): | |
828 | OP(FILTER_OP_LE): | |
829 | printk(KERN_WARNING "unsupported non-specialized bytecode op %u\n", | |
830 | (unsigned int) *(filter_opcode_t *) pc); | |
831 | ret = -EINVAL; | |
832 | goto end; | |
833 | ||
834 | OP(FILTER_OP_EQ_STRING): | |
835 | { | |
836 | int res; | |
837 | ||
838 | res = (stack_strcmp(stack, top, "==") == 0); | |
839 | estack_pop(stack, top, ax, bx); | |
840 | estack_ax_v = res; | |
841 | next_pc += sizeof(struct binary_op); | |
842 | PO; | |
843 | } | |
844 | OP(FILTER_OP_NE_STRING): | |
845 | { | |
846 | int res; | |
847 | ||
848 | res = (stack_strcmp(stack, top, "!=") != 0); | |
849 | estack_pop(stack, top, ax, bx); | |
850 | estack_ax_v = res; | |
851 | next_pc += sizeof(struct binary_op); | |
852 | PO; | |
853 | } | |
854 | OP(FILTER_OP_GT_STRING): | |
855 | { | |
856 | int res; | |
857 | ||
858 | res = (stack_strcmp(stack, top, ">") > 0); | |
859 | estack_pop(stack, top, ax, bx); | |
860 | estack_ax_v = res; | |
861 | next_pc += sizeof(struct binary_op); | |
862 | PO; | |
863 | } | |
864 | OP(FILTER_OP_LT_STRING): | |
865 | { | |
866 | int res; | |
867 | ||
868 | res = (stack_strcmp(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 | OP(FILTER_OP_GE_STRING): | |
875 | { | |
876 | int res; | |
877 | ||
878 | res = (stack_strcmp(stack, top, ">=") >= 0); | |
879 | estack_pop(stack, top, ax, bx); | |
880 | estack_ax_v = res; | |
881 | next_pc += sizeof(struct binary_op); | |
882 | PO; | |
883 | } | |
884 | OP(FILTER_OP_LE_STRING): | |
885 | { | |
886 | int res; | |
887 | ||
888 | res = (stack_strcmp(stack, top, "<=") <= 0); | |
889 | estack_pop(stack, top, ax, bx); | |
890 | estack_ax_v = res; | |
891 | next_pc += sizeof(struct binary_op); | |
892 | PO; | |
893 | } | |
894 | ||
02aca193 PP |
895 | OP(FILTER_OP_EQ_STAR_GLOB_STRING): |
896 | { | |
897 | int res; | |
898 | ||
899 | res = (stack_star_glob_match(stack, top, "==") == 0); | |
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_NE_STAR_GLOB_STRING): | |
906 | { | |
907 | int res; | |
908 | ||
909 | res = (stack_star_glob_match(stack, top, "!=") != 0); | |
910 | estack_pop(stack, top, ax, bx); | |
911 | estack_ax_v = res; | |
912 | next_pc += sizeof(struct binary_op); | |
913 | PO; | |
914 | } | |
915 | ||
07dfc1d0 MD |
916 | OP(FILTER_OP_EQ_S64): |
917 | { | |
918 | int res; | |
919 | ||
920 | res = (estack_bx_v == estack_ax_v); | |
921 | estack_pop(stack, top, ax, bx); | |
922 | estack_ax_v = res; | |
923 | next_pc += sizeof(struct binary_op); | |
924 | PO; | |
925 | } | |
926 | OP(FILTER_OP_NE_S64): | |
927 | { | |
928 | int res; | |
929 | ||
930 | res = (estack_bx_v != estack_ax_v); | |
931 | estack_pop(stack, top, ax, bx); | |
932 | estack_ax_v = res; | |
933 | next_pc += sizeof(struct binary_op); | |
934 | PO; | |
935 | } | |
936 | OP(FILTER_OP_GT_S64): | |
937 | { | |
938 | int res; | |
939 | ||
940 | res = (estack_bx_v > estack_ax_v); | |
941 | estack_pop(stack, top, ax, bx); | |
942 | estack_ax_v = res; | |
943 | next_pc += sizeof(struct binary_op); | |
944 | PO; | |
945 | } | |
946 | OP(FILTER_OP_LT_S64): | |
947 | { | |
948 | int res; | |
949 | ||
950 | res = (estack_bx_v < estack_ax_v); | |
951 | estack_pop(stack, top, ax, bx); | |
952 | estack_ax_v = res; | |
953 | next_pc += sizeof(struct binary_op); | |
954 | PO; | |
955 | } | |
956 | OP(FILTER_OP_GE_S64): | |
957 | { | |
958 | int res; | |
959 | ||
960 | res = (estack_bx_v >= estack_ax_v); | |
961 | estack_pop(stack, top, ax, bx); | |
962 | estack_ax_v = res; | |
963 | next_pc += sizeof(struct binary_op); | |
964 | PO; | |
965 | } | |
966 | OP(FILTER_OP_LE_S64): | |
967 | { | |
968 | int res; | |
969 | ||
970 | res = (estack_bx_v <= estack_ax_v); | |
971 | estack_pop(stack, top, ax, bx); | |
972 | estack_ax_v = res; | |
973 | next_pc += sizeof(struct binary_op); | |
974 | PO; | |
975 | } | |
976 | ||
977 | OP(FILTER_OP_EQ_DOUBLE): | |
978 | OP(FILTER_OP_NE_DOUBLE): | |
979 | OP(FILTER_OP_GT_DOUBLE): | |
980 | OP(FILTER_OP_LT_DOUBLE): | |
981 | OP(FILTER_OP_GE_DOUBLE): | |
982 | OP(FILTER_OP_LE_DOUBLE): | |
983 | { | |
984 | BUG_ON(1); | |
985 | PO; | |
986 | } | |
987 | ||
988 | /* Mixed S64-double binary comparators */ | |
989 | OP(FILTER_OP_EQ_DOUBLE_S64): | |
990 | OP(FILTER_OP_NE_DOUBLE_S64): | |
991 | OP(FILTER_OP_GT_DOUBLE_S64): | |
992 | OP(FILTER_OP_LT_DOUBLE_S64): | |
993 | OP(FILTER_OP_GE_DOUBLE_S64): | |
994 | OP(FILTER_OP_LE_DOUBLE_S64): | |
995 | OP(FILTER_OP_EQ_S64_DOUBLE): | |
996 | OP(FILTER_OP_NE_S64_DOUBLE): | |
997 | OP(FILTER_OP_GT_S64_DOUBLE): | |
998 | OP(FILTER_OP_LT_S64_DOUBLE): | |
999 | OP(FILTER_OP_GE_S64_DOUBLE): | |
1000 | OP(FILTER_OP_LE_S64_DOUBLE): | |
1001 | { | |
1002 | BUG_ON(1); | |
1003 | PO; | |
1004 | } | |
e16c054b MD |
1005 | OP(FILTER_OP_BIT_RSHIFT): |
1006 | { | |
1007 | int64_t res; | |
1008 | ||
ea13ec96 MD |
1009 | /* Catch undefined behavior. */ |
1010 | if (unlikely(estack_ax_v < 0 || estack_ax_v >= 64)) { | |
1011 | ret = -EINVAL; | |
1012 | goto end; | |
1013 | } | |
f8d42740 | 1014 | res = ((uint64_t) estack_bx_v >> (uint32_t) estack_ax_v); |
e16c054b MD |
1015 | estack_pop(stack, top, ax, bx); |
1016 | estack_ax_v = res; | |
1017 | next_pc += sizeof(struct binary_op); | |
1018 | PO; | |
1019 | } | |
1020 | OP(FILTER_OP_BIT_LSHIFT): | |
1021 | { | |
1022 | int64_t res; | |
1023 | ||
ea13ec96 MD |
1024 | /* Catch undefined behavior. */ |
1025 | if (unlikely(estack_ax_v < 0 || estack_ax_v >= 64)) { | |
1026 | ret = -EINVAL; | |
1027 | goto end; | |
1028 | } | |
f8d42740 | 1029 | res = ((uint64_t) estack_bx_v << (uint32_t) estack_ax_v); |
e16c054b MD |
1030 | estack_pop(stack, top, ax, bx); |
1031 | estack_ax_v = res; | |
1032 | next_pc += sizeof(struct binary_op); | |
1033 | PO; | |
1034 | } | |
3834b99f MD |
1035 | OP(FILTER_OP_BIT_AND): |
1036 | { | |
1037 | int64_t res; | |
1038 | ||
f8d42740 | 1039 | res = ((uint64_t) estack_bx_v & (uint64_t) estack_ax_v); |
3834b99f MD |
1040 | estack_pop(stack, top, ax, bx); |
1041 | estack_ax_v = res; | |
1042 | next_pc += sizeof(struct binary_op); | |
1043 | PO; | |
1044 | } | |
1045 | OP(FILTER_OP_BIT_OR): | |
1046 | { | |
1047 | int64_t res; | |
1048 | ||
f8d42740 | 1049 | res = ((uint64_t) estack_bx_v | (uint64_t) estack_ax_v); |
3834b99f MD |
1050 | estack_pop(stack, top, ax, bx); |
1051 | estack_ax_v = res; | |
1052 | next_pc += sizeof(struct binary_op); | |
1053 | PO; | |
1054 | } | |
1055 | OP(FILTER_OP_BIT_XOR): | |
1056 | { | |
1057 | int64_t res; | |
1058 | ||
f8d42740 | 1059 | res = ((uint64_t) estack_bx_v ^ (uint64_t) estack_ax_v); |
3834b99f MD |
1060 | estack_pop(stack, top, ax, bx); |
1061 | estack_ax_v = res; | |
1062 | next_pc += sizeof(struct binary_op); | |
1063 | PO; | |
1064 | } | |
07dfc1d0 MD |
1065 | |
1066 | /* unary */ | |
1067 | OP(FILTER_OP_UNARY_PLUS): | |
1068 | OP(FILTER_OP_UNARY_MINUS): | |
1069 | OP(FILTER_OP_UNARY_NOT): | |
1070 | printk(KERN_WARNING "unsupported non-specialized bytecode op %u\n", | |
1071 | (unsigned int) *(filter_opcode_t *) pc); | |
1072 | ret = -EINVAL; | |
1073 | goto end; | |
1074 | ||
1075 | ||
e16c054b MD |
1076 | OP(FILTER_OP_UNARY_BIT_NOT): |
1077 | { | |
f8d42740 | 1078 | estack_ax_v = ~(uint64_t) estack_ax_v; |
e16c054b MD |
1079 | next_pc += sizeof(struct unary_op); |
1080 | PO; | |
1081 | } | |
1082 | ||
07dfc1d0 MD |
1083 | OP(FILTER_OP_UNARY_PLUS_S64): |
1084 | { | |
1085 | next_pc += sizeof(struct unary_op); | |
1086 | PO; | |
1087 | } | |
1088 | OP(FILTER_OP_UNARY_MINUS_S64): | |
1089 | { | |
1090 | estack_ax_v = -estack_ax_v; | |
1091 | next_pc += sizeof(struct unary_op); | |
1092 | PO; | |
1093 | } | |
1094 | OP(FILTER_OP_UNARY_PLUS_DOUBLE): | |
1095 | OP(FILTER_OP_UNARY_MINUS_DOUBLE): | |
1096 | { | |
1097 | BUG_ON(1); | |
1098 | PO; | |
1099 | } | |
1100 | OP(FILTER_OP_UNARY_NOT_S64): | |
1101 | { | |
1102 | estack_ax_v = !estack_ax_v; | |
1103 | next_pc += sizeof(struct unary_op); | |
1104 | PO; | |
1105 | } | |
1106 | OP(FILTER_OP_UNARY_NOT_DOUBLE): | |
1107 | { | |
1108 | BUG_ON(1); | |
1109 | PO; | |
1110 | } | |
1111 | ||
1112 | /* logical */ | |
1113 | OP(FILTER_OP_AND): | |
1114 | { | |
1115 | struct logical_op *insn = (struct logical_op *) pc; | |
1116 | ||
1117 | /* If AX is 0, skip and evaluate to 0 */ | |
1118 | if (unlikely(estack_ax_v == 0)) { | |
1119 | dbg_printk("Jumping to bytecode offset %u\n", | |
1120 | (unsigned int) insn->skip_offset); | |
1121 | next_pc = start_pc + insn->skip_offset; | |
1122 | } else { | |
1123 | /* Pop 1 when jump not taken */ | |
1124 | estack_pop(stack, top, ax, bx); | |
1125 | next_pc += sizeof(struct logical_op); | |
1126 | } | |
1127 | PO; | |
1128 | } | |
1129 | OP(FILTER_OP_OR): | |
1130 | { | |
1131 | struct logical_op *insn = (struct logical_op *) pc; | |
1132 | ||
1133 | /* If AX is nonzero, skip and evaluate to 1 */ | |
1134 | ||
1135 | if (unlikely(estack_ax_v != 0)) { | |
1136 | estack_ax_v = 1; | |
1137 | dbg_printk("Jumping to bytecode offset %u\n", | |
1138 | (unsigned int) insn->skip_offset); | |
1139 | next_pc = start_pc + insn->skip_offset; | |
1140 | } else { | |
1141 | /* Pop 1 when jump not taken */ | |
1142 | estack_pop(stack, top, ax, bx); | |
1143 | next_pc += sizeof(struct logical_op); | |
1144 | } | |
1145 | PO; | |
1146 | } | |
1147 | ||
1148 | ||
1149 | /* load field ref */ | |
1150 | OP(FILTER_OP_LOAD_FIELD_REF_STRING): | |
1151 | { | |
1152 | struct load_op *insn = (struct load_op *) pc; | |
1153 | struct field_ref *ref = (struct field_ref *) insn->data; | |
1154 | ||
1155 | dbg_printk("load field ref offset %u type string\n", | |
1156 | ref->offset); | |
1157 | estack_push(stack, top, ax, bx); | |
1158 | estack_ax(stack, top)->u.s.str = | |
1159 | *(const char * const *) &filter_stack_data[ref->offset]; | |
1160 | if (unlikely(!estack_ax(stack, top)->u.s.str)) { | |
1161 | dbg_printk("Filter warning: loading a NULL string.\n"); | |
1162 | ret = -EINVAL; | |
1163 | goto end; | |
1164 | } | |
cbc19040 | 1165 | estack_ax(stack, top)->u.s.seq_len = LTTNG_SIZE_MAX; |
02aca193 PP |
1166 | estack_ax(stack, top)->u.s.literal_type = |
1167 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
f127e61e | 1168 | estack_ax(stack, top)->u.s.user = 0; |
07dfc1d0 MD |
1169 | dbg_printk("ref load string %s\n", estack_ax(stack, top)->u.s.str); |
1170 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
1171 | PO; | |
1172 | } | |
1173 | ||
1174 | OP(FILTER_OP_LOAD_FIELD_REF_SEQUENCE): | |
1175 | { | |
1176 | struct load_op *insn = (struct load_op *) pc; | |
1177 | struct field_ref *ref = (struct field_ref *) insn->data; | |
1178 | ||
1179 | dbg_printk("load field ref offset %u type sequence\n", | |
1180 | ref->offset); | |
1181 | estack_push(stack, top, ax, bx); | |
1182 | estack_ax(stack, top)->u.s.seq_len = | |
1183 | *(unsigned long *) &filter_stack_data[ref->offset]; | |
1184 | estack_ax(stack, top)->u.s.str = | |
1185 | *(const char **) (&filter_stack_data[ref->offset | |
1186 | + sizeof(unsigned long)]); | |
1187 | if (unlikely(!estack_ax(stack, top)->u.s.str)) { | |
1188 | dbg_printk("Filter warning: loading a NULL sequence.\n"); | |
1189 | ret = -EINVAL; | |
1190 | goto end; | |
1191 | } | |
02aca193 PP |
1192 | estack_ax(stack, top)->u.s.literal_type = |
1193 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
f127e61e | 1194 | estack_ax(stack, top)->u.s.user = 0; |
07dfc1d0 MD |
1195 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); |
1196 | PO; | |
1197 | } | |
1198 | ||
1199 | OP(FILTER_OP_LOAD_FIELD_REF_S64): | |
1200 | { | |
1201 | struct load_op *insn = (struct load_op *) pc; | |
1202 | struct field_ref *ref = (struct field_ref *) insn->data; | |
1203 | ||
1204 | dbg_printk("load field ref offset %u type s64\n", | |
1205 | ref->offset); | |
1206 | estack_push(stack, top, ax, bx); | |
1207 | estack_ax_v = | |
1208 | ((struct literal_numeric *) &filter_stack_data[ref->offset])->v; | |
1209 | dbg_printk("ref load s64 %lld\n", | |
1210 | (long long) estack_ax_v); | |
1211 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
1212 | PO; | |
1213 | } | |
1214 | ||
1215 | OP(FILTER_OP_LOAD_FIELD_REF_DOUBLE): | |
1216 | { | |
1217 | BUG_ON(1); | |
1218 | PO; | |
1219 | } | |
1220 | ||
1221 | /* load from immediate operand */ | |
1222 | OP(FILTER_OP_LOAD_STRING): | |
1223 | { | |
1224 | struct load_op *insn = (struct load_op *) pc; | |
1225 | ||
1226 | dbg_printk("load string %s\n", insn->data); | |
1227 | estack_push(stack, top, ax, bx); | |
1228 | estack_ax(stack, top)->u.s.str = insn->data; | |
cbc19040 | 1229 | estack_ax(stack, top)->u.s.seq_len = LTTNG_SIZE_MAX; |
02aca193 PP |
1230 | estack_ax(stack, top)->u.s.literal_type = |
1231 | ESTACK_STRING_LITERAL_TYPE_PLAIN; | |
1232 | estack_ax(stack, top)->u.s.user = 0; | |
1233 | next_pc += sizeof(struct load_op) + strlen(insn->data) + 1; | |
1234 | PO; | |
1235 | } | |
1236 | ||
1237 | OP(FILTER_OP_LOAD_STAR_GLOB_STRING): | |
1238 | { | |
1239 | struct load_op *insn = (struct load_op *) pc; | |
1240 | ||
1241 | dbg_printk("load globbing pattern %s\n", insn->data); | |
1242 | estack_push(stack, top, ax, bx); | |
1243 | estack_ax(stack, top)->u.s.str = insn->data; | |
cbc19040 | 1244 | estack_ax(stack, top)->u.s.seq_len = LTTNG_SIZE_MAX; |
02aca193 PP |
1245 | estack_ax(stack, top)->u.s.literal_type = |
1246 | ESTACK_STRING_LITERAL_TYPE_STAR_GLOB; | |
f127e61e | 1247 | estack_ax(stack, top)->u.s.user = 0; |
07dfc1d0 MD |
1248 | next_pc += sizeof(struct load_op) + strlen(insn->data) + 1; |
1249 | PO; | |
1250 | } | |
1251 | ||
1252 | OP(FILTER_OP_LOAD_S64): | |
1253 | { | |
1254 | struct load_op *insn = (struct load_op *) pc; | |
1255 | ||
1256 | estack_push(stack, top, ax, bx); | |
1257 | estack_ax_v = ((struct literal_numeric *) insn->data)->v; | |
1258 | dbg_printk("load s64 %lld\n", | |
1259 | (long long) estack_ax_v); | |
1260 | next_pc += sizeof(struct load_op) | |
1261 | + sizeof(struct literal_numeric); | |
1262 | PO; | |
1263 | } | |
1264 | ||
1265 | OP(FILTER_OP_LOAD_DOUBLE): | |
1266 | { | |
1267 | BUG_ON(1); | |
1268 | PO; | |
1269 | } | |
1270 | ||
1271 | /* cast */ | |
1272 | OP(FILTER_OP_CAST_TO_S64): | |
1273 | printk(KERN_WARNING "unsupported non-specialized bytecode op %u\n", | |
1274 | (unsigned int) *(filter_opcode_t *) pc); | |
1275 | ret = -EINVAL; | |
1276 | goto end; | |
1277 | ||
1278 | OP(FILTER_OP_CAST_DOUBLE_TO_S64): | |
1279 | { | |
1280 | BUG_ON(1); | |
1281 | PO; | |
1282 | } | |
1283 | ||
1284 | OP(FILTER_OP_CAST_NOP): | |
1285 | { | |
1286 | next_pc += sizeof(struct cast_op); | |
1287 | PO; | |
1288 | } | |
1289 | ||
1290 | /* get context ref */ | |
1291 | OP(FILTER_OP_GET_CONTEXT_REF_STRING): | |
1292 | { | |
1293 | struct load_op *insn = (struct load_op *) pc; | |
1294 | struct field_ref *ref = (struct field_ref *) insn->data; | |
1295 | struct lttng_ctx_field *ctx_field; | |
1296 | union lttng_ctx_value v; | |
1297 | ||
1298 | dbg_printk("get context ref offset %u type string\n", | |
1299 | ref->offset); | |
1300 | ctx_field = <tng_static_ctx->fields[ref->offset]; | |
79150a49 | 1301 | ctx_field->get_value(ctx_field, lttng_probe_ctx, &v); |
07dfc1d0 MD |
1302 | estack_push(stack, top, ax, bx); |
1303 | estack_ax(stack, top)->u.s.str = v.str; | |
1304 | if (unlikely(!estack_ax(stack, top)->u.s.str)) { | |
1305 | dbg_printk("Filter warning: loading a NULL string.\n"); | |
1306 | ret = -EINVAL; | |
1307 | goto end; | |
1308 | } | |
cbc19040 | 1309 | estack_ax(stack, top)->u.s.seq_len = LTTNG_SIZE_MAX; |
02aca193 PP |
1310 | estack_ax(stack, top)->u.s.literal_type = |
1311 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
f127e61e | 1312 | estack_ax(stack, top)->u.s.user = 0; |
07dfc1d0 MD |
1313 | dbg_printk("ref get context string %s\n", estack_ax(stack, top)->u.s.str); |
1314 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
1315 | PO; | |
1316 | } | |
1317 | ||
1318 | OP(FILTER_OP_GET_CONTEXT_REF_S64): | |
1319 | { | |
1320 | struct load_op *insn = (struct load_op *) pc; | |
1321 | struct field_ref *ref = (struct field_ref *) insn->data; | |
1322 | struct lttng_ctx_field *ctx_field; | |
1323 | union lttng_ctx_value v; | |
1324 | ||
1325 | dbg_printk("get context ref offset %u type s64\n", | |
1326 | ref->offset); | |
1327 | ctx_field = <tng_static_ctx->fields[ref->offset]; | |
79150a49 | 1328 | ctx_field->get_value(ctx_field, lttng_probe_ctx, &v); |
07dfc1d0 MD |
1329 | estack_push(stack, top, ax, bx); |
1330 | estack_ax_v = v.s64; | |
1331 | dbg_printk("ref get context s64 %lld\n", | |
1332 | (long long) estack_ax_v); | |
1333 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
1334 | PO; | |
1335 | } | |
1336 | ||
1337 | OP(FILTER_OP_GET_CONTEXT_REF_DOUBLE): | |
1338 | { | |
1339 | BUG_ON(1); | |
1340 | PO; | |
1341 | } | |
1342 | ||
f127e61e MD |
1343 | /* load userspace field ref */ |
1344 | OP(FILTER_OP_LOAD_FIELD_REF_USER_STRING): | |
1345 | { | |
1346 | struct load_op *insn = (struct load_op *) pc; | |
1347 | struct field_ref *ref = (struct field_ref *) insn->data; | |
1348 | ||
1349 | dbg_printk("load field ref offset %u type user string\n", | |
1350 | ref->offset); | |
1351 | estack_push(stack, top, ax, bx); | |
5b4ad89f | 1352 | estack_ax(stack, top)->u.s.user_str = |
f127e61e | 1353 | *(const char * const *) &filter_stack_data[ref->offset]; |
23a2f61f | 1354 | if (unlikely(!estack_ax(stack, top)->u.s.user_str)) { |
f127e61e MD |
1355 | dbg_printk("Filter warning: loading a NULL string.\n"); |
1356 | ret = -EINVAL; | |
1357 | goto end; | |
1358 | } | |
cbc19040 | 1359 | estack_ax(stack, top)->u.s.seq_len = LTTNG_SIZE_MAX; |
02aca193 PP |
1360 | estack_ax(stack, top)->u.s.literal_type = |
1361 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
f127e61e | 1362 | estack_ax(stack, top)->u.s.user = 1; |
23a2f61f | 1363 | dbg_load_ref_user_str_printk(estack_ax(stack, top)); |
f127e61e MD |
1364 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); |
1365 | PO; | |
1366 | } | |
1367 | ||
1368 | OP(FILTER_OP_LOAD_FIELD_REF_USER_SEQUENCE): | |
1369 | { | |
1370 | struct load_op *insn = (struct load_op *) pc; | |
1371 | struct field_ref *ref = (struct field_ref *) insn->data; | |
1372 | ||
1373 | dbg_printk("load field ref offset %u type user sequence\n", | |
1374 | ref->offset); | |
1375 | estack_push(stack, top, ax, bx); | |
1376 | estack_ax(stack, top)->u.s.seq_len = | |
1377 | *(unsigned long *) &filter_stack_data[ref->offset]; | |
5b4ad89f | 1378 | estack_ax(stack, top)->u.s.user_str = |
f127e61e MD |
1379 | *(const char **) (&filter_stack_data[ref->offset |
1380 | + sizeof(unsigned long)]); | |
23a2f61f | 1381 | if (unlikely(!estack_ax(stack, top)->u.s.user_str)) { |
f127e61e MD |
1382 | dbg_printk("Filter warning: loading a NULL sequence.\n"); |
1383 | ret = -EINVAL; | |
1384 | goto end; | |
1385 | } | |
02aca193 PP |
1386 | estack_ax(stack, top)->u.s.literal_type = |
1387 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
f127e61e MD |
1388 | estack_ax(stack, top)->u.s.user = 1; |
1389 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
1390 | PO; | |
1391 | } | |
1392 | ||
3834b99f MD |
1393 | OP(FILTER_OP_GET_CONTEXT_ROOT): |
1394 | { | |
1395 | dbg_printk("op get context root\n"); | |
1396 | estack_push(stack, top, ax, bx); | |
1397 | estack_ax(stack, top)->u.ptr.type = LOAD_ROOT_CONTEXT; | |
1398 | /* "field" only needed for variants. */ | |
1399 | estack_ax(stack, top)->u.ptr.field = NULL; | |
1400 | next_pc += sizeof(struct load_op); | |
1401 | PO; | |
1402 | } | |
1403 | ||
1404 | OP(FILTER_OP_GET_APP_CONTEXT_ROOT): | |
1405 | { | |
1406 | BUG_ON(1); | |
1407 | PO; | |
1408 | } | |
1409 | ||
1410 | OP(FILTER_OP_GET_PAYLOAD_ROOT): | |
1411 | { | |
1412 | dbg_printk("op get app payload root\n"); | |
1413 | estack_push(stack, top, ax, bx); | |
1414 | estack_ax(stack, top)->u.ptr.type = LOAD_ROOT_PAYLOAD; | |
1415 | estack_ax(stack, top)->u.ptr.ptr = filter_stack_data; | |
1416 | /* "field" only needed for variants. */ | |
1417 | estack_ax(stack, top)->u.ptr.field = NULL; | |
1418 | next_pc += sizeof(struct load_op); | |
1419 | PO; | |
1420 | } | |
1421 | ||
1422 | OP(FILTER_OP_GET_SYMBOL): | |
1423 | { | |
1424 | dbg_printk("op get symbol\n"); | |
1425 | switch (estack_ax(stack, top)->u.ptr.type) { | |
1426 | case LOAD_OBJECT: | |
1427 | printk(KERN_WARNING "Nested fields not implemented yet.\n"); | |
1428 | ret = -EINVAL; | |
1429 | goto end; | |
1430 | case LOAD_ROOT_CONTEXT: | |
1431 | case LOAD_ROOT_APP_CONTEXT: | |
1432 | case LOAD_ROOT_PAYLOAD: | |
1433 | /* | |
1434 | * symbol lookup is performed by | |
1435 | * specialization. | |
1436 | */ | |
1437 | ret = -EINVAL; | |
1438 | goto end; | |
1439 | } | |
1440 | next_pc += sizeof(struct load_op) + sizeof(struct get_symbol); | |
1441 | PO; | |
1442 | } | |
1443 | ||
1444 | OP(FILTER_OP_GET_SYMBOL_FIELD): | |
1445 | { | |
1446 | /* | |
1447 | * Used for first variant encountered in a | |
1448 | * traversal. Variants are not implemented yet. | |
1449 | */ | |
1450 | ret = -EINVAL; | |
1451 | goto end; | |
1452 | } | |
1453 | ||
1454 | OP(FILTER_OP_GET_INDEX_U16): | |
1455 | { | |
1456 | struct load_op *insn = (struct load_op *) pc; | |
1457 | struct get_index_u16 *index = (struct get_index_u16 *) insn->data; | |
1458 | ||
1459 | dbg_printk("op get index u16\n"); | |
1460 | ret = dynamic_get_index(lttng_probe_ctx, bytecode, index->index, estack_ax(stack, top)); | |
1461 | if (ret) | |
1462 | goto end; | |
1463 | estack_ax_v = estack_ax(stack, top)->u.v; | |
1464 | next_pc += sizeof(struct load_op) + sizeof(struct get_index_u16); | |
1465 | PO; | |
1466 | } | |
1467 | ||
1468 | OP(FILTER_OP_GET_INDEX_U64): | |
1469 | { | |
1470 | struct load_op *insn = (struct load_op *) pc; | |
1471 | struct get_index_u64 *index = (struct get_index_u64 *) insn->data; | |
1472 | ||
1473 | dbg_printk("op get index u64\n"); | |
1474 | ret = dynamic_get_index(lttng_probe_ctx, bytecode, index->index, estack_ax(stack, top)); | |
1475 | if (ret) | |
1476 | goto end; | |
1477 | estack_ax_v = estack_ax(stack, top)->u.v; | |
1478 | next_pc += sizeof(struct load_op) + sizeof(struct get_index_u64); | |
1479 | PO; | |
1480 | } | |
1481 | ||
1482 | OP(FILTER_OP_LOAD_FIELD): | |
1483 | { | |
1484 | dbg_printk("op load field\n"); | |
1485 | ret = dynamic_load_field(estack_ax(stack, top)); | |
1486 | if (ret) | |
1487 | goto end; | |
1488 | estack_ax_v = estack_ax(stack, top)->u.v; | |
1489 | next_pc += sizeof(struct load_op); | |
1490 | PO; | |
1491 | } | |
1492 | ||
1493 | OP(FILTER_OP_LOAD_FIELD_S8): | |
1494 | { | |
1495 | dbg_printk("op load field s8\n"); | |
1496 | ||
1497 | estack_ax_v = *(int8_t *) estack_ax(stack, top)->u.ptr.ptr; | |
1498 | next_pc += sizeof(struct load_op); | |
1499 | PO; | |
1500 | } | |
1501 | OP(FILTER_OP_LOAD_FIELD_S16): | |
1502 | { | |
1503 | dbg_printk("op load field s16\n"); | |
1504 | ||
1505 | estack_ax_v = *(int16_t *) estack_ax(stack, top)->u.ptr.ptr; | |
1506 | next_pc += sizeof(struct load_op); | |
1507 | PO; | |
1508 | } | |
1509 | OP(FILTER_OP_LOAD_FIELD_S32): | |
1510 | { | |
1511 | dbg_printk("op load field s32\n"); | |
1512 | ||
1513 | estack_ax_v = *(int32_t *) estack_ax(stack, top)->u.ptr.ptr; | |
1514 | next_pc += sizeof(struct load_op); | |
1515 | PO; | |
1516 | } | |
1517 | OP(FILTER_OP_LOAD_FIELD_S64): | |
1518 | { | |
1519 | dbg_printk("op load field s64\n"); | |
1520 | ||
1521 | estack_ax_v = *(int64_t *) estack_ax(stack, top)->u.ptr.ptr; | |
1522 | next_pc += sizeof(struct load_op); | |
1523 | PO; | |
1524 | } | |
1525 | OP(FILTER_OP_LOAD_FIELD_U8): | |
1526 | { | |
1527 | dbg_printk("op load field u8\n"); | |
1528 | ||
1529 | estack_ax_v = *(uint8_t *) estack_ax(stack, top)->u.ptr.ptr; | |
1530 | next_pc += sizeof(struct load_op); | |
1531 | PO; | |
1532 | } | |
1533 | OP(FILTER_OP_LOAD_FIELD_U16): | |
1534 | { | |
1535 | dbg_printk("op load field u16\n"); | |
1536 | ||
1537 | estack_ax_v = *(uint16_t *) estack_ax(stack, top)->u.ptr.ptr; | |
1538 | next_pc += sizeof(struct load_op); | |
1539 | PO; | |
1540 | } | |
1541 | OP(FILTER_OP_LOAD_FIELD_U32): | |
1542 | { | |
1543 | dbg_printk("op load field u32\n"); | |
1544 | ||
1545 | estack_ax_v = *(uint32_t *) estack_ax(stack, top)->u.ptr.ptr; | |
1546 | next_pc += sizeof(struct load_op); | |
1547 | PO; | |
1548 | } | |
1549 | OP(FILTER_OP_LOAD_FIELD_U64): | |
1550 | { | |
1551 | dbg_printk("op load field u64\n"); | |
1552 | ||
1553 | estack_ax_v = *(uint64_t *) estack_ax(stack, top)->u.ptr.ptr; | |
1554 | next_pc += sizeof(struct load_op); | |
1555 | PO; | |
1556 | } | |
1557 | OP(FILTER_OP_LOAD_FIELD_DOUBLE): | |
1558 | { | |
1559 | ret = -EINVAL; | |
1560 | goto end; | |
1561 | } | |
1562 | ||
1563 | OP(FILTER_OP_LOAD_FIELD_STRING): | |
1564 | { | |
1565 | const char *str; | |
1566 | ||
1567 | dbg_printk("op load field string\n"); | |
1568 | str = (const char *) estack_ax(stack, top)->u.ptr.ptr; | |
1569 | estack_ax(stack, top)->u.s.str = str; | |
1570 | if (unlikely(!estack_ax(stack, top)->u.s.str)) { | |
1571 | dbg_printk("Filter warning: loading a NULL string.\n"); | |
1572 | ret = -EINVAL; | |
1573 | goto end; | |
1574 | } | |
4efe037b | 1575 | estack_ax(stack, top)->u.s.seq_len = LTTNG_SIZE_MAX; |
3834b99f MD |
1576 | estack_ax(stack, top)->u.s.literal_type = |
1577 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
1578 | next_pc += sizeof(struct load_op); | |
1579 | PO; | |
1580 | } | |
1581 | ||
1582 | OP(FILTER_OP_LOAD_FIELD_SEQUENCE): | |
1583 | { | |
1584 | const char *ptr; | |
1585 | ||
1586 | dbg_printk("op load field string sequence\n"); | |
1587 | ptr = estack_ax(stack, top)->u.ptr.ptr; | |
1588 | estack_ax(stack, top)->u.s.seq_len = *(unsigned long *) ptr; | |
1589 | estack_ax(stack, top)->u.s.str = *(const char **) (ptr + sizeof(unsigned long)); | |
1590 | if (unlikely(!estack_ax(stack, top)->u.s.str)) { | |
1591 | dbg_printk("Filter warning: loading a NULL sequence.\n"); | |
1592 | ret = -EINVAL; | |
1593 | goto end; | |
1594 | } | |
1595 | estack_ax(stack, top)->u.s.literal_type = | |
1596 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
1597 | next_pc += sizeof(struct load_op); | |
1598 | PO; | |
1599 | } | |
1600 | ||
07dfc1d0 MD |
1601 | END_OP |
1602 | end: | |
1603 | /* return 0 (discard) on error */ | |
1604 | if (ret) | |
1605 | return 0; | |
1606 | return retval; | |
1607 | } | |
1608 | ||
1609 | #undef START_OP | |
1610 | #undef OP | |
1611 | #undef PO | |
1612 | #undef END_OP |