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 | ||
1242217a FD |
265 | #define IS_INTEGER_REGISTER(reg_type) \ |
266 | (reg_type == REG_S64 || reg_type == REG_U64) | |
d644d1df | 267 | |
3834b99f MD |
268 | static int context_get_index(struct lttng_probe_ctx *lttng_probe_ctx, |
269 | struct load_ptr *ptr, | |
270 | uint32_t idx) | |
271 | { | |
272 | ||
273 | struct lttng_ctx_field *ctx_field; | |
274 | struct lttng_event_field *field; | |
275 | union lttng_ctx_value v; | |
276 | ||
277 | ctx_field = <tng_static_ctx->fields[idx]; | |
278 | field = &ctx_field->event_field; | |
279 | ptr->type = LOAD_OBJECT; | |
280 | /* field is only used for types nested within variants. */ | |
281 | ptr->field = NULL; | |
282 | ||
283 | switch (field->type.atype) { | |
284 | case atype_integer: | |
285 | ctx_field->get_value(ctx_field, lttng_probe_ctx, &v); | |
ceabb767 | 286 | if (field->type.u.integer.signedness) { |
3834b99f MD |
287 | ptr->object_type = OBJECT_TYPE_S64; |
288 | ptr->u.s64 = v.s64; | |
289 | ptr->ptr = &ptr->u.s64; | |
290 | } else { | |
291 | ptr->object_type = OBJECT_TYPE_U64; | |
292 | ptr->u.u64 = v.s64; /* Cast. */ | |
293 | ptr->ptr = &ptr->u.u64; | |
294 | } | |
295 | break; | |
ceabb767 | 296 | case atype_enum_nestable: |
3834b99f MD |
297 | { |
298 | const struct lttng_integer_type *itype = | |
ceabb767 | 299 | &field->type.u.enum_nestable.container_type->u.integer; |
3834b99f MD |
300 | |
301 | ctx_field->get_value(ctx_field, lttng_probe_ctx, &v); | |
302 | if (itype->signedness) { | |
303 | ptr->object_type = OBJECT_TYPE_S64; | |
304 | ptr->u.s64 = v.s64; | |
305 | ptr->ptr = &ptr->u.s64; | |
306 | } else { | |
307 | ptr->object_type = OBJECT_TYPE_U64; | |
308 | ptr->u.u64 = v.s64; /* Cast. */ | |
309 | ptr->ptr = &ptr->u.u64; | |
310 | } | |
311 | break; | |
312 | } | |
ceabb767 MD |
313 | case atype_array_nestable: |
314 | if (!lttng_is_bytewise_integer(field->type.u.array_nestable.elem_type)) { | |
5a15f70c | 315 | printk(KERN_WARNING "LTTng: filter: Array nesting only supports integer types.\n"); |
3834b99f MD |
316 | return -EINVAL; |
317 | } | |
ceabb767 | 318 | if (field->type.u.array_nestable.elem_type->u.integer.encoding == lttng_encode_none) { |
5a15f70c | 319 | printk(KERN_WARNING "LTTng: filter: Only string arrays are supported for contexts.\n"); |
3834b99f MD |
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; | |
ceabb767 MD |
326 | case atype_sequence_nestable: |
327 | if (!lttng_is_bytewise_integer(field->type.u.sequence_nestable.elem_type)) { | |
5a15f70c | 328 | printk(KERN_WARNING "LTTng: filter: Sequence nesting only supports integer types.\n"); |
3834b99f MD |
329 | return -EINVAL; |
330 | } | |
ceabb767 | 331 | if (field->type.u.sequence_nestable.elem_type->u.integer.encoding == lttng_encode_none) { |
5a15f70c | 332 | printk(KERN_WARNING "LTTng: filter: Only string sequences are supported for contexts.\n"); |
3834b99f MD |
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; | |
3834b99f MD |
339 | case atype_string: |
340 | ptr->object_type = OBJECT_TYPE_STRING; | |
341 | ctx_field->get_value(ctx_field, lttng_probe_ctx, &v); | |
342 | ptr->ptr = v.str; | |
343 | break; | |
ceabb767 | 344 | case atype_struct_nestable: |
5a15f70c | 345 | printk(KERN_WARNING "LTTng: filter: Structure type cannot be loaded.\n"); |
3834b99f | 346 | return -EINVAL; |
ceabb767 | 347 | case atype_variant_nestable: |
5a15f70c | 348 | printk(KERN_WARNING "LTTng: filter: Variant type cannot be loaded.\n"); |
ceabb767 | 349 | return -EINVAL; |
3834b99f | 350 | default: |
5a15f70c | 351 | printk(KERN_WARNING "LTTng: filter: Unknown type: %d", (int) field->type.atype); |
3834b99f MD |
352 | return -EINVAL; |
353 | } | |
354 | return 0; | |
355 | } | |
356 | ||
357 | static int dynamic_get_index(struct lttng_probe_ctx *lttng_probe_ctx, | |
358 | struct bytecode_runtime *runtime, | |
359 | uint64_t index, struct estack_entry *stack_top) | |
360 | { | |
361 | int ret; | |
362 | const struct filter_get_index_data *gid; | |
363 | ||
364 | /* | |
365 | * Types nested within variants need to perform dynamic lookup | |
366 | * based on the field descriptions. LTTng-UST does not implement | |
367 | * variants for now. | |
368 | */ | |
369 | if (stack_top->u.ptr.field) | |
370 | return -EINVAL; | |
371 | gid = (const struct filter_get_index_data *) &runtime->data[index]; | |
372 | switch (stack_top->u.ptr.type) { | |
373 | case LOAD_OBJECT: | |
374 | switch (stack_top->u.ptr.object_type) { | |
375 | case OBJECT_TYPE_ARRAY: | |
376 | { | |
377 | const char *ptr; | |
378 | ||
379 | WARN_ON_ONCE(gid->offset >= gid->array_len); | |
380 | /* Skip count (unsigned long) */ | |
381 | ptr = *(const char **) (stack_top->u.ptr.ptr + sizeof(unsigned long)); | |
382 | ptr = ptr + gid->offset; | |
383 | stack_top->u.ptr.ptr = ptr; | |
384 | stack_top->u.ptr.object_type = gid->elem.type; | |
385 | stack_top->u.ptr.rev_bo = gid->elem.rev_bo; | |
386 | /* field is only used for types nested within variants. */ | |
387 | stack_top->u.ptr.field = NULL; | |
388 | break; | |
389 | } | |
390 | case OBJECT_TYPE_SEQUENCE: | |
391 | { | |
392 | const char *ptr; | |
393 | size_t ptr_seq_len; | |
394 | ||
395 | ptr = *(const char **) (stack_top->u.ptr.ptr + sizeof(unsigned long)); | |
396 | ptr_seq_len = *(unsigned long *) stack_top->u.ptr.ptr; | |
397 | if (gid->offset >= gid->elem.len * ptr_seq_len) { | |
398 | ret = -EINVAL; | |
399 | goto end; | |
400 | } | |
401 | ptr = ptr + gid->offset; | |
402 | stack_top->u.ptr.ptr = ptr; | |
403 | stack_top->u.ptr.object_type = gid->elem.type; | |
404 | stack_top->u.ptr.rev_bo = gid->elem.rev_bo; | |
405 | /* field is only used for types nested within variants. */ | |
406 | stack_top->u.ptr.field = NULL; | |
407 | break; | |
408 | } | |
409 | case OBJECT_TYPE_STRUCT: | |
5a15f70c | 410 | printk(KERN_WARNING "LTTng: filter: Nested structures are not supported yet.\n"); |
3834b99f MD |
411 | ret = -EINVAL; |
412 | goto end; | |
413 | case OBJECT_TYPE_VARIANT: | |
414 | default: | |
5a15f70c | 415 | printk(KERN_WARNING "LTTng: filter: Unexpected get index type %d", |
3834b99f MD |
416 | (int) stack_top->u.ptr.object_type); |
417 | ret = -EINVAL; | |
418 | goto end; | |
419 | } | |
420 | break; | |
421 | case LOAD_ROOT_CONTEXT: | |
422 | case LOAD_ROOT_APP_CONTEXT: /* Fall-through */ | |
423 | { | |
424 | ret = context_get_index(lttng_probe_ctx, | |
425 | &stack_top->u.ptr, | |
426 | gid->ctx_index); | |
427 | if (ret) { | |
428 | goto end; | |
429 | } | |
430 | break; | |
431 | } | |
432 | case LOAD_ROOT_PAYLOAD: | |
433 | stack_top->u.ptr.ptr += gid->offset; | |
434 | if (gid->elem.type == OBJECT_TYPE_STRING) | |
435 | stack_top->u.ptr.ptr = *(const char * const *) stack_top->u.ptr.ptr; | |
436 | stack_top->u.ptr.object_type = gid->elem.type; | |
437 | stack_top->u.ptr.type = LOAD_OBJECT; | |
438 | /* field is only used for types nested within variants. */ | |
439 | stack_top->u.ptr.field = NULL; | |
440 | break; | |
441 | } | |
442 | return 0; | |
443 | ||
444 | end: | |
445 | return ret; | |
446 | } | |
447 | ||
448 | static int dynamic_load_field(struct estack_entry *stack_top) | |
449 | { | |
450 | int ret; | |
451 | ||
452 | switch (stack_top->u.ptr.type) { | |
453 | case LOAD_OBJECT: | |
454 | break; | |
455 | case LOAD_ROOT_CONTEXT: | |
456 | case LOAD_ROOT_APP_CONTEXT: | |
457 | case LOAD_ROOT_PAYLOAD: | |
458 | default: | |
459 | dbg_printk("Filter warning: cannot load root, missing field name.\n"); | |
460 | ret = -EINVAL; | |
461 | goto end; | |
462 | } | |
463 | switch (stack_top->u.ptr.object_type) { | |
464 | case OBJECT_TYPE_S8: | |
465 | dbg_printk("op load field s8\n"); | |
466 | stack_top->u.v = *(int8_t *) stack_top->u.ptr.ptr; | |
d644d1df | 467 | stack_top->type = REG_S64; |
3834b99f MD |
468 | break; |
469 | case OBJECT_TYPE_S16: | |
470 | { | |
471 | int16_t tmp; | |
472 | ||
473 | dbg_printk("op load field s16\n"); | |
474 | tmp = *(int16_t *) stack_top->u.ptr.ptr; | |
475 | if (stack_top->u.ptr.rev_bo) | |
476 | __swab16s(&tmp); | |
477 | stack_top->u.v = tmp; | |
d644d1df | 478 | stack_top->type = REG_S64; |
3834b99f MD |
479 | break; |
480 | } | |
481 | case OBJECT_TYPE_S32: | |
482 | { | |
483 | int32_t tmp; | |
484 | ||
485 | dbg_printk("op load field s32\n"); | |
486 | tmp = *(int32_t *) stack_top->u.ptr.ptr; | |
487 | if (stack_top->u.ptr.rev_bo) | |
488 | __swab32s(&tmp); | |
489 | stack_top->u.v = tmp; | |
d644d1df | 490 | stack_top->type = REG_S64; |
3834b99f MD |
491 | break; |
492 | } | |
493 | case OBJECT_TYPE_S64: | |
494 | { | |
495 | int64_t tmp; | |
496 | ||
497 | dbg_printk("op load field s64\n"); | |
498 | tmp = *(int64_t *) stack_top->u.ptr.ptr; | |
499 | if (stack_top->u.ptr.rev_bo) | |
500 | __swab64s(&tmp); | |
501 | stack_top->u.v = tmp; | |
d644d1df | 502 | stack_top->type = REG_S64; |
3834b99f MD |
503 | break; |
504 | } | |
505 | case OBJECT_TYPE_U8: | |
506 | dbg_printk("op load field u8\n"); | |
507 | stack_top->u.v = *(uint8_t *) stack_top->u.ptr.ptr; | |
1242217a | 508 | stack_top->type = REG_U64; |
3834b99f MD |
509 | break; |
510 | case OBJECT_TYPE_U16: | |
511 | { | |
512 | uint16_t tmp; | |
513 | ||
5fae98f7 | 514 | dbg_printk("op load field u16\n"); |
3834b99f MD |
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; | |
1242217a | 519 | stack_top->type = REG_U64; |
3834b99f MD |
520 | break; |
521 | } | |
522 | case OBJECT_TYPE_U32: | |
523 | { | |
524 | uint32_t tmp; | |
525 | ||
526 | dbg_printk("op load field u32\n"); | |
527 | tmp = *(uint32_t *) stack_top->u.ptr.ptr; | |
528 | if (stack_top->u.ptr.rev_bo) | |
529 | __swab32s(&tmp); | |
530 | stack_top->u.v = tmp; | |
1242217a | 531 | stack_top->type = REG_U64; |
3834b99f MD |
532 | break; |
533 | } | |
534 | case OBJECT_TYPE_U64: | |
535 | { | |
536 | uint64_t tmp; | |
537 | ||
538 | dbg_printk("op load field u64\n"); | |
539 | tmp = *(uint64_t *) stack_top->u.ptr.ptr; | |
540 | if (stack_top->u.ptr.rev_bo) | |
541 | __swab64s(&tmp); | |
542 | stack_top->u.v = tmp; | |
1242217a | 543 | stack_top->type = REG_U64; |
3834b99f MD |
544 | break; |
545 | } | |
546 | case OBJECT_TYPE_STRING: | |
547 | { | |
548 | const char *str; | |
549 | ||
550 | dbg_printk("op load field string\n"); | |
551 | str = (const char *) stack_top->u.ptr.ptr; | |
552 | stack_top->u.s.str = str; | |
553 | if (unlikely(!stack_top->u.s.str)) { | |
554 | dbg_printk("Filter warning: loading a NULL string.\n"); | |
555 | ret = -EINVAL; | |
556 | goto end; | |
557 | } | |
4efe037b | 558 | stack_top->u.s.seq_len = LTTNG_SIZE_MAX; |
3834b99f MD |
559 | stack_top->u.s.literal_type = |
560 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
d644d1df | 561 | stack_top->type = REG_STRING; |
3834b99f MD |
562 | break; |
563 | } | |
564 | case OBJECT_TYPE_STRING_SEQUENCE: | |
565 | { | |
566 | const char *ptr; | |
567 | ||
568 | dbg_printk("op load field string sequence\n"); | |
569 | ptr = stack_top->u.ptr.ptr; | |
570 | stack_top->u.s.seq_len = *(unsigned long *) ptr; | |
571 | stack_top->u.s.str = *(const char **) (ptr + sizeof(unsigned long)); | |
572 | if (unlikely(!stack_top->u.s.str)) { | |
573 | dbg_printk("Filter warning: loading a NULL sequence.\n"); | |
574 | ret = -EINVAL; | |
575 | goto end; | |
576 | } | |
577 | stack_top->u.s.literal_type = | |
578 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
d644d1df | 579 | stack_top->type = REG_STRING; |
3834b99f MD |
580 | break; |
581 | } | |
582 | case OBJECT_TYPE_DYNAMIC: | |
583 | /* | |
584 | * Dynamic types in context are looked up | |
585 | * by context get index. | |
586 | */ | |
587 | ret = -EINVAL; | |
588 | goto end; | |
589 | case OBJECT_TYPE_DOUBLE: | |
590 | ret = -EINVAL; | |
591 | goto end; | |
592 | case OBJECT_TYPE_SEQUENCE: | |
593 | case OBJECT_TYPE_ARRAY: | |
594 | case OBJECT_TYPE_STRUCT: | |
595 | case OBJECT_TYPE_VARIANT: | |
5a15f70c | 596 | printk(KERN_WARNING "LTTng: filter: Sequences, arrays, struct and variant cannot be loaded (nested types).\n"); |
3834b99f MD |
597 | ret = -EINVAL; |
598 | goto end; | |
599 | } | |
600 | return 0; | |
601 | ||
602 | end: | |
603 | return ret; | |
604 | } | |
605 | ||
07dfc1d0 MD |
606 | /* |
607 | * Return 0 (discard), or raise the 0x1 flag (log event). | |
608 | * Currently, other flags are kept for future extensions and have no | |
609 | * effect. | |
610 | */ | |
611 | uint64_t lttng_filter_interpret_bytecode(void *filter_data, | |
79150a49 | 612 | struct lttng_probe_ctx *lttng_probe_ctx, |
07dfc1d0 MD |
613 | const char *filter_stack_data) |
614 | { | |
615 | struct bytecode_runtime *bytecode = filter_data; | |
616 | void *pc, *next_pc, *start_pc; | |
617 | int ret = -EINVAL; | |
618 | uint64_t retval = 0; | |
619 | struct estack _stack; | |
620 | struct estack *stack = &_stack; | |
621 | register int64_t ax = 0, bx = 0; | |
d644d1df | 622 | register enum entry_type ax_t = REG_TYPE_UNKNOWN, bx_t = REG_TYPE_UNKNOWN; |
07dfc1d0 MD |
623 | register int top = FILTER_STACK_EMPTY; |
624 | #ifndef INTERPRETER_USE_SWITCH | |
625 | static void *dispatch[NR_FILTER_OPS] = { | |
626 | [ FILTER_OP_UNKNOWN ] = &&LABEL_FILTER_OP_UNKNOWN, | |
627 | ||
628 | [ FILTER_OP_RETURN ] = &&LABEL_FILTER_OP_RETURN, | |
629 | ||
630 | /* binary */ | |
631 | [ FILTER_OP_MUL ] = &&LABEL_FILTER_OP_MUL, | |
632 | [ FILTER_OP_DIV ] = &&LABEL_FILTER_OP_DIV, | |
633 | [ FILTER_OP_MOD ] = &&LABEL_FILTER_OP_MOD, | |
634 | [ FILTER_OP_PLUS ] = &&LABEL_FILTER_OP_PLUS, | |
635 | [ FILTER_OP_MINUS ] = &&LABEL_FILTER_OP_MINUS, | |
e16c054b MD |
636 | [ FILTER_OP_BIT_RSHIFT ] = &&LABEL_FILTER_OP_BIT_RSHIFT, |
637 | [ FILTER_OP_BIT_LSHIFT ] = &&LABEL_FILTER_OP_BIT_LSHIFT, | |
3834b99f MD |
638 | [ FILTER_OP_BIT_AND ] = &&LABEL_FILTER_OP_BIT_AND, |
639 | [ FILTER_OP_BIT_OR ] = &&LABEL_FILTER_OP_BIT_OR, | |
640 | [ FILTER_OP_BIT_XOR ] = &&LABEL_FILTER_OP_BIT_XOR, | |
07dfc1d0 MD |
641 | |
642 | /* binary comparators */ | |
643 | [ FILTER_OP_EQ ] = &&LABEL_FILTER_OP_EQ, | |
644 | [ FILTER_OP_NE ] = &&LABEL_FILTER_OP_NE, | |
645 | [ FILTER_OP_GT ] = &&LABEL_FILTER_OP_GT, | |
646 | [ FILTER_OP_LT ] = &&LABEL_FILTER_OP_LT, | |
647 | [ FILTER_OP_GE ] = &&LABEL_FILTER_OP_GE, | |
648 | [ FILTER_OP_LE ] = &&LABEL_FILTER_OP_LE, | |
649 | ||
650 | /* string binary comparator */ | |
651 | [ FILTER_OP_EQ_STRING ] = &&LABEL_FILTER_OP_EQ_STRING, | |
652 | [ FILTER_OP_NE_STRING ] = &&LABEL_FILTER_OP_NE_STRING, | |
653 | [ FILTER_OP_GT_STRING ] = &&LABEL_FILTER_OP_GT_STRING, | |
654 | [ FILTER_OP_LT_STRING ] = &&LABEL_FILTER_OP_LT_STRING, | |
655 | [ FILTER_OP_GE_STRING ] = &&LABEL_FILTER_OP_GE_STRING, | |
656 | [ FILTER_OP_LE_STRING ] = &&LABEL_FILTER_OP_LE_STRING, | |
657 | ||
02aca193 PP |
658 | /* globbing pattern binary comparator */ |
659 | [ FILTER_OP_EQ_STAR_GLOB_STRING ] = &&LABEL_FILTER_OP_EQ_STAR_GLOB_STRING, | |
660 | [ FILTER_OP_NE_STAR_GLOB_STRING ] = &&LABEL_FILTER_OP_NE_STAR_GLOB_STRING, | |
661 | ||
07dfc1d0 MD |
662 | /* s64 binary comparator */ |
663 | [ FILTER_OP_EQ_S64 ] = &&LABEL_FILTER_OP_EQ_S64, | |
664 | [ FILTER_OP_NE_S64 ] = &&LABEL_FILTER_OP_NE_S64, | |
665 | [ FILTER_OP_GT_S64 ] = &&LABEL_FILTER_OP_GT_S64, | |
666 | [ FILTER_OP_LT_S64 ] = &&LABEL_FILTER_OP_LT_S64, | |
667 | [ FILTER_OP_GE_S64 ] = &&LABEL_FILTER_OP_GE_S64, | |
668 | [ FILTER_OP_LE_S64 ] = &&LABEL_FILTER_OP_LE_S64, | |
669 | ||
670 | /* double binary comparator */ | |
671 | [ FILTER_OP_EQ_DOUBLE ] = &&LABEL_FILTER_OP_EQ_DOUBLE, | |
672 | [ FILTER_OP_NE_DOUBLE ] = &&LABEL_FILTER_OP_NE_DOUBLE, | |
673 | [ FILTER_OP_GT_DOUBLE ] = &&LABEL_FILTER_OP_GT_DOUBLE, | |
674 | [ FILTER_OP_LT_DOUBLE ] = &&LABEL_FILTER_OP_LT_DOUBLE, | |
675 | [ FILTER_OP_GE_DOUBLE ] = &&LABEL_FILTER_OP_GE_DOUBLE, | |
676 | [ FILTER_OP_LE_DOUBLE ] = &&LABEL_FILTER_OP_LE_DOUBLE, | |
677 | ||
678 | /* Mixed S64-double binary comparators */ | |
679 | [ FILTER_OP_EQ_DOUBLE_S64 ] = &&LABEL_FILTER_OP_EQ_DOUBLE_S64, | |
680 | [ FILTER_OP_NE_DOUBLE_S64 ] = &&LABEL_FILTER_OP_NE_DOUBLE_S64, | |
681 | [ FILTER_OP_GT_DOUBLE_S64 ] = &&LABEL_FILTER_OP_GT_DOUBLE_S64, | |
682 | [ FILTER_OP_LT_DOUBLE_S64 ] = &&LABEL_FILTER_OP_LT_DOUBLE_S64, | |
683 | [ FILTER_OP_GE_DOUBLE_S64 ] = &&LABEL_FILTER_OP_GE_DOUBLE_S64, | |
684 | [ FILTER_OP_LE_DOUBLE_S64 ] = &&LABEL_FILTER_OP_LE_DOUBLE_S64, | |
685 | ||
686 | [ FILTER_OP_EQ_S64_DOUBLE ] = &&LABEL_FILTER_OP_EQ_S64_DOUBLE, | |
687 | [ FILTER_OP_NE_S64_DOUBLE ] = &&LABEL_FILTER_OP_NE_S64_DOUBLE, | |
688 | [ FILTER_OP_GT_S64_DOUBLE ] = &&LABEL_FILTER_OP_GT_S64_DOUBLE, | |
689 | [ FILTER_OP_LT_S64_DOUBLE ] = &&LABEL_FILTER_OP_LT_S64_DOUBLE, | |
690 | [ FILTER_OP_GE_S64_DOUBLE ] = &&LABEL_FILTER_OP_GE_S64_DOUBLE, | |
691 | [ FILTER_OP_LE_S64_DOUBLE ] = &&LABEL_FILTER_OP_LE_S64_DOUBLE, | |
692 | ||
693 | /* unary */ | |
694 | [ FILTER_OP_UNARY_PLUS ] = &&LABEL_FILTER_OP_UNARY_PLUS, | |
695 | [ FILTER_OP_UNARY_MINUS ] = &&LABEL_FILTER_OP_UNARY_MINUS, | |
696 | [ FILTER_OP_UNARY_NOT ] = &&LABEL_FILTER_OP_UNARY_NOT, | |
697 | [ FILTER_OP_UNARY_PLUS_S64 ] = &&LABEL_FILTER_OP_UNARY_PLUS_S64, | |
698 | [ FILTER_OP_UNARY_MINUS_S64 ] = &&LABEL_FILTER_OP_UNARY_MINUS_S64, | |
699 | [ FILTER_OP_UNARY_NOT_S64 ] = &&LABEL_FILTER_OP_UNARY_NOT_S64, | |
700 | [ FILTER_OP_UNARY_PLUS_DOUBLE ] = &&LABEL_FILTER_OP_UNARY_PLUS_DOUBLE, | |
701 | [ FILTER_OP_UNARY_MINUS_DOUBLE ] = &&LABEL_FILTER_OP_UNARY_MINUS_DOUBLE, | |
702 | [ FILTER_OP_UNARY_NOT_DOUBLE ] = &&LABEL_FILTER_OP_UNARY_NOT_DOUBLE, | |
703 | ||
704 | /* logical */ | |
705 | [ FILTER_OP_AND ] = &&LABEL_FILTER_OP_AND, | |
706 | [ FILTER_OP_OR ] = &&LABEL_FILTER_OP_OR, | |
707 | ||
708 | /* load field ref */ | |
709 | [ FILTER_OP_LOAD_FIELD_REF ] = &&LABEL_FILTER_OP_LOAD_FIELD_REF, | |
710 | [ FILTER_OP_LOAD_FIELD_REF_STRING ] = &&LABEL_FILTER_OP_LOAD_FIELD_REF_STRING, | |
711 | [ FILTER_OP_LOAD_FIELD_REF_SEQUENCE ] = &&LABEL_FILTER_OP_LOAD_FIELD_REF_SEQUENCE, | |
712 | [ FILTER_OP_LOAD_FIELD_REF_S64 ] = &&LABEL_FILTER_OP_LOAD_FIELD_REF_S64, | |
713 | [ FILTER_OP_LOAD_FIELD_REF_DOUBLE ] = &&LABEL_FILTER_OP_LOAD_FIELD_REF_DOUBLE, | |
714 | ||
715 | /* load from immediate operand */ | |
716 | [ FILTER_OP_LOAD_STRING ] = &&LABEL_FILTER_OP_LOAD_STRING, | |
02aca193 | 717 | [ FILTER_OP_LOAD_STAR_GLOB_STRING ] = &&LABEL_FILTER_OP_LOAD_STAR_GLOB_STRING, |
07dfc1d0 MD |
718 | [ FILTER_OP_LOAD_S64 ] = &&LABEL_FILTER_OP_LOAD_S64, |
719 | [ FILTER_OP_LOAD_DOUBLE ] = &&LABEL_FILTER_OP_LOAD_DOUBLE, | |
720 | ||
721 | /* cast */ | |
722 | [ FILTER_OP_CAST_TO_S64 ] = &&LABEL_FILTER_OP_CAST_TO_S64, | |
723 | [ FILTER_OP_CAST_DOUBLE_TO_S64 ] = &&LABEL_FILTER_OP_CAST_DOUBLE_TO_S64, | |
724 | [ FILTER_OP_CAST_NOP ] = &&LABEL_FILTER_OP_CAST_NOP, | |
725 | ||
726 | /* get context ref */ | |
727 | [ FILTER_OP_GET_CONTEXT_REF ] = &&LABEL_FILTER_OP_GET_CONTEXT_REF, | |
728 | [ FILTER_OP_GET_CONTEXT_REF_STRING ] = &&LABEL_FILTER_OP_GET_CONTEXT_REF_STRING, | |
729 | [ FILTER_OP_GET_CONTEXT_REF_S64 ] = &&LABEL_FILTER_OP_GET_CONTEXT_REF_S64, | |
730 | [ FILTER_OP_GET_CONTEXT_REF_DOUBLE ] = &&LABEL_FILTER_OP_GET_CONTEXT_REF_DOUBLE, | |
f127e61e MD |
731 | |
732 | /* load userspace field ref */ | |
733 | [ FILTER_OP_LOAD_FIELD_REF_USER_STRING ] = &&LABEL_FILTER_OP_LOAD_FIELD_REF_USER_STRING, | |
734 | [ FILTER_OP_LOAD_FIELD_REF_USER_SEQUENCE ] = &&LABEL_FILTER_OP_LOAD_FIELD_REF_USER_SEQUENCE, | |
3834b99f MD |
735 | |
736 | /* Instructions for recursive traversal through composed types. */ | |
737 | [ FILTER_OP_GET_CONTEXT_ROOT ] = &&LABEL_FILTER_OP_GET_CONTEXT_ROOT, | |
738 | [ FILTER_OP_GET_APP_CONTEXT_ROOT ] = &&LABEL_FILTER_OP_GET_APP_CONTEXT_ROOT, | |
739 | [ FILTER_OP_GET_PAYLOAD_ROOT ] = &&LABEL_FILTER_OP_GET_PAYLOAD_ROOT, | |
740 | ||
741 | [ FILTER_OP_GET_SYMBOL ] = &&LABEL_FILTER_OP_GET_SYMBOL, | |
742 | [ FILTER_OP_GET_SYMBOL_FIELD ] = &&LABEL_FILTER_OP_GET_SYMBOL_FIELD, | |
743 | [ FILTER_OP_GET_INDEX_U16 ] = &&LABEL_FILTER_OP_GET_INDEX_U16, | |
744 | [ FILTER_OP_GET_INDEX_U64 ] = &&LABEL_FILTER_OP_GET_INDEX_U64, | |
745 | ||
746 | [ FILTER_OP_LOAD_FIELD ] = &&LABEL_FILTER_OP_LOAD_FIELD, | |
747 | [ FILTER_OP_LOAD_FIELD_S8 ] = &&LABEL_FILTER_OP_LOAD_FIELD_S8, | |
748 | [ FILTER_OP_LOAD_FIELD_S16 ] = &&LABEL_FILTER_OP_LOAD_FIELD_S16, | |
749 | [ FILTER_OP_LOAD_FIELD_S32 ] = &&LABEL_FILTER_OP_LOAD_FIELD_S32, | |
750 | [ FILTER_OP_LOAD_FIELD_S64 ] = &&LABEL_FILTER_OP_LOAD_FIELD_S64, | |
751 | [ FILTER_OP_LOAD_FIELD_U8 ] = &&LABEL_FILTER_OP_LOAD_FIELD_U8, | |
752 | [ FILTER_OP_LOAD_FIELD_U16 ] = &&LABEL_FILTER_OP_LOAD_FIELD_U16, | |
753 | [ FILTER_OP_LOAD_FIELD_U32 ] = &&LABEL_FILTER_OP_LOAD_FIELD_U32, | |
754 | [ FILTER_OP_LOAD_FIELD_U64 ] = &&LABEL_FILTER_OP_LOAD_FIELD_U64, | |
755 | [ FILTER_OP_LOAD_FIELD_STRING ] = &&LABEL_FILTER_OP_LOAD_FIELD_STRING, | |
756 | [ FILTER_OP_LOAD_FIELD_SEQUENCE ] = &&LABEL_FILTER_OP_LOAD_FIELD_SEQUENCE, | |
757 | [ FILTER_OP_LOAD_FIELD_DOUBLE ] = &&LABEL_FILTER_OP_LOAD_FIELD_DOUBLE, | |
e16c054b MD |
758 | |
759 | [ FILTER_OP_UNARY_BIT_NOT ] = &&LABEL_FILTER_OP_UNARY_BIT_NOT, | |
57ba4b41 MD |
760 | |
761 | [ FILTER_OP_RETURN_S64 ] = &&LABEL_FILTER_OP_RETURN_S64, | |
07dfc1d0 MD |
762 | }; |
763 | #endif /* #ifndef INTERPRETER_USE_SWITCH */ | |
764 | ||
765 | START_OP | |
766 | ||
767 | OP(FILTER_OP_UNKNOWN): | |
768 | OP(FILTER_OP_LOAD_FIELD_REF): | |
769 | OP(FILTER_OP_GET_CONTEXT_REF): | |
770 | #ifdef INTERPRETER_USE_SWITCH | |
771 | default: | |
772 | #endif /* INTERPRETER_USE_SWITCH */ | |
5a15f70c | 773 | printk(KERN_WARNING "LTTng: filter: unknown bytecode op %u\n", |
07dfc1d0 MD |
774 | (unsigned int) *(filter_opcode_t *) pc); |
775 | ret = -EINVAL; | |
776 | goto end; | |
777 | ||
778 | OP(FILTER_OP_RETURN): | |
57ba4b41 | 779 | OP(FILTER_OP_RETURN_S64): |
a93d4e71 | 780 | /* LTTNG_FILTER_DISCARD or LTTNG_FILTER_RECORD_FLAG */ |
d644d1df FD |
781 | switch (estack_ax_t) { |
782 | case REG_S64: | |
1242217a | 783 | case REG_U64: |
d644d1df FD |
784 | retval = !!estack_ax_v; |
785 | break; | |
786 | case REG_DOUBLE: | |
787 | case REG_STRING: | |
788 | case REG_PTR: | |
789 | case REG_STAR_GLOB_STRING: | |
790 | case REG_TYPE_UNKNOWN: | |
791 | ret = -EINVAL; | |
792 | goto end; | |
793 | } | |
07dfc1d0 MD |
794 | ret = 0; |
795 | goto end; | |
796 | ||
797 | /* binary */ | |
798 | OP(FILTER_OP_MUL): | |
799 | OP(FILTER_OP_DIV): | |
800 | OP(FILTER_OP_MOD): | |
801 | OP(FILTER_OP_PLUS): | |
802 | OP(FILTER_OP_MINUS): | |
5a15f70c | 803 | printk(KERN_WARNING "LTTng: filter: unsupported bytecode op %u\n", |
07dfc1d0 MD |
804 | (unsigned int) *(filter_opcode_t *) pc); |
805 | ret = -EINVAL; | |
806 | goto end; | |
807 | ||
808 | OP(FILTER_OP_EQ): | |
809 | OP(FILTER_OP_NE): | |
810 | OP(FILTER_OP_GT): | |
811 | OP(FILTER_OP_LT): | |
812 | OP(FILTER_OP_GE): | |
813 | OP(FILTER_OP_LE): | |
5a15f70c | 814 | printk(KERN_WARNING "LTTng: filter: unsupported non-specialized bytecode op %u\n", |
07dfc1d0 MD |
815 | (unsigned int) *(filter_opcode_t *) pc); |
816 | ret = -EINVAL; | |
817 | goto end; | |
818 | ||
819 | OP(FILTER_OP_EQ_STRING): | |
820 | { | |
821 | int res; | |
822 | ||
823 | res = (stack_strcmp(stack, top, "==") == 0); | |
d644d1df | 824 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 825 | estack_ax_v = res; |
d644d1df | 826 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
827 | next_pc += sizeof(struct binary_op); |
828 | PO; | |
829 | } | |
830 | OP(FILTER_OP_NE_STRING): | |
831 | { | |
832 | int res; | |
833 | ||
834 | res = (stack_strcmp(stack, top, "!=") != 0); | |
d644d1df | 835 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 836 | estack_ax_v = res; |
d644d1df | 837 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
838 | next_pc += sizeof(struct binary_op); |
839 | PO; | |
840 | } | |
841 | OP(FILTER_OP_GT_STRING): | |
842 | { | |
843 | int res; | |
844 | ||
845 | res = (stack_strcmp(stack, top, ">") > 0); | |
d644d1df | 846 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 847 | estack_ax_v = res; |
d644d1df | 848 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
849 | next_pc += sizeof(struct binary_op); |
850 | PO; | |
851 | } | |
852 | OP(FILTER_OP_LT_STRING): | |
853 | { | |
854 | int res; | |
855 | ||
856 | res = (stack_strcmp(stack, top, "<") < 0); | |
d644d1df | 857 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 858 | estack_ax_v = res; |
d644d1df | 859 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
860 | next_pc += sizeof(struct binary_op); |
861 | PO; | |
862 | } | |
863 | OP(FILTER_OP_GE_STRING): | |
864 | { | |
865 | int res; | |
866 | ||
867 | res = (stack_strcmp(stack, top, ">=") >= 0); | |
d644d1df | 868 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 869 | estack_ax_v = res; |
d644d1df | 870 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
871 | next_pc += sizeof(struct binary_op); |
872 | PO; | |
873 | } | |
874 | OP(FILTER_OP_LE_STRING): | |
875 | { | |
876 | int res; | |
877 | ||
878 | res = (stack_strcmp(stack, top, "<=") <= 0); | |
d644d1df | 879 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 880 | estack_ax_v = res; |
d644d1df | 881 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
882 | next_pc += sizeof(struct binary_op); |
883 | PO; | |
884 | } | |
885 | ||
02aca193 PP |
886 | OP(FILTER_OP_EQ_STAR_GLOB_STRING): |
887 | { | |
888 | int res; | |
889 | ||
890 | res = (stack_star_glob_match(stack, top, "==") == 0); | |
d644d1df | 891 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
02aca193 | 892 | estack_ax_v = res; |
d644d1df | 893 | estack_ax_t = REG_S64; |
02aca193 PP |
894 | next_pc += sizeof(struct binary_op); |
895 | PO; | |
896 | } | |
897 | OP(FILTER_OP_NE_STAR_GLOB_STRING): | |
898 | { | |
899 | int res; | |
900 | ||
901 | res = (stack_star_glob_match(stack, top, "!=") != 0); | |
d644d1df | 902 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
02aca193 | 903 | estack_ax_v = res; |
d644d1df | 904 | estack_ax_t = REG_S64; |
02aca193 PP |
905 | next_pc += sizeof(struct binary_op); |
906 | PO; | |
907 | } | |
908 | ||
07dfc1d0 MD |
909 | OP(FILTER_OP_EQ_S64): |
910 | { | |
911 | int res; | |
912 | ||
913 | res = (estack_bx_v == estack_ax_v); | |
d644d1df | 914 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 915 | estack_ax_v = res; |
d644d1df | 916 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
917 | next_pc += sizeof(struct binary_op); |
918 | PO; | |
919 | } | |
920 | OP(FILTER_OP_NE_S64): | |
921 | { | |
922 | int res; | |
923 | ||
924 | res = (estack_bx_v != estack_ax_v); | |
d644d1df | 925 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 926 | estack_ax_v = res; |
d644d1df | 927 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
928 | next_pc += sizeof(struct binary_op); |
929 | PO; | |
930 | } | |
931 | OP(FILTER_OP_GT_S64): | |
932 | { | |
933 | int res; | |
934 | ||
935 | res = (estack_bx_v > estack_ax_v); | |
d644d1df | 936 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 937 | estack_ax_v = res; |
d644d1df | 938 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
939 | next_pc += sizeof(struct binary_op); |
940 | PO; | |
941 | } | |
942 | OP(FILTER_OP_LT_S64): | |
943 | { | |
944 | int res; | |
945 | ||
946 | res = (estack_bx_v < estack_ax_v); | |
d644d1df | 947 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 948 | estack_ax_v = res; |
d644d1df | 949 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
950 | next_pc += sizeof(struct binary_op); |
951 | PO; | |
952 | } | |
953 | OP(FILTER_OP_GE_S64): | |
954 | { | |
955 | int res; | |
956 | ||
957 | res = (estack_bx_v >= estack_ax_v); | |
d644d1df | 958 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 959 | estack_ax_v = res; |
d644d1df | 960 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
961 | next_pc += sizeof(struct binary_op); |
962 | PO; | |
963 | } | |
964 | OP(FILTER_OP_LE_S64): | |
965 | { | |
966 | int res; | |
967 | ||
968 | res = (estack_bx_v <= estack_ax_v); | |
d644d1df | 969 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 970 | estack_ax_v = res; |
d644d1df | 971 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
972 | next_pc += sizeof(struct binary_op); |
973 | PO; | |
974 | } | |
975 | ||
976 | OP(FILTER_OP_EQ_DOUBLE): | |
977 | OP(FILTER_OP_NE_DOUBLE): | |
978 | OP(FILTER_OP_GT_DOUBLE): | |
979 | OP(FILTER_OP_LT_DOUBLE): | |
980 | OP(FILTER_OP_GE_DOUBLE): | |
981 | OP(FILTER_OP_LE_DOUBLE): | |
982 | { | |
983 | BUG_ON(1); | |
984 | PO; | |
985 | } | |
986 | ||
987 | /* Mixed S64-double binary comparators */ | |
988 | OP(FILTER_OP_EQ_DOUBLE_S64): | |
989 | OP(FILTER_OP_NE_DOUBLE_S64): | |
990 | OP(FILTER_OP_GT_DOUBLE_S64): | |
991 | OP(FILTER_OP_LT_DOUBLE_S64): | |
992 | OP(FILTER_OP_GE_DOUBLE_S64): | |
993 | OP(FILTER_OP_LE_DOUBLE_S64): | |
994 | OP(FILTER_OP_EQ_S64_DOUBLE): | |
995 | OP(FILTER_OP_NE_S64_DOUBLE): | |
996 | OP(FILTER_OP_GT_S64_DOUBLE): | |
997 | OP(FILTER_OP_LT_S64_DOUBLE): | |
998 | OP(FILTER_OP_GE_S64_DOUBLE): | |
999 | OP(FILTER_OP_LE_S64_DOUBLE): | |
1000 | { | |
1001 | BUG_ON(1); | |
1002 | PO; | |
1003 | } | |
e16c054b MD |
1004 | OP(FILTER_OP_BIT_RSHIFT): |
1005 | { | |
1006 | int64_t res; | |
1007 | ||
d644d1df FD |
1008 | if (!IS_INTEGER_REGISTER(estack_ax_t) || !IS_INTEGER_REGISTER(estack_bx_t)) { |
1009 | ret = -EINVAL; | |
1010 | goto end; | |
1011 | } | |
1012 | ||
ea13ec96 MD |
1013 | /* Catch undefined behavior. */ |
1014 | if (unlikely(estack_ax_v < 0 || estack_ax_v >= 64)) { | |
1015 | ret = -EINVAL; | |
1016 | goto end; | |
1017 | } | |
f8d42740 | 1018 | res = ((uint64_t) estack_bx_v >> (uint32_t) estack_ax_v); |
d644d1df | 1019 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
e16c054b | 1020 | estack_ax_v = res; |
1242217a | 1021 | estack_ax_t = REG_U64; |
e16c054b MD |
1022 | next_pc += sizeof(struct binary_op); |
1023 | PO; | |
1024 | } | |
1025 | OP(FILTER_OP_BIT_LSHIFT): | |
1026 | { | |
1027 | int64_t res; | |
1028 | ||
d644d1df FD |
1029 | if (!IS_INTEGER_REGISTER(estack_ax_t) || !IS_INTEGER_REGISTER(estack_bx_t)) { |
1030 | ret = -EINVAL; | |
1031 | goto end; | |
1032 | } | |
1033 | ||
ea13ec96 MD |
1034 | /* Catch undefined behavior. */ |
1035 | if (unlikely(estack_ax_v < 0 || estack_ax_v >= 64)) { | |
1036 | ret = -EINVAL; | |
1037 | goto end; | |
1038 | } | |
f8d42740 | 1039 | res = ((uint64_t) estack_bx_v << (uint32_t) estack_ax_v); |
d644d1df | 1040 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
e16c054b | 1041 | estack_ax_v = res; |
1242217a | 1042 | estack_ax_t = REG_U64; |
e16c054b MD |
1043 | next_pc += sizeof(struct binary_op); |
1044 | PO; | |
1045 | } | |
3834b99f MD |
1046 | OP(FILTER_OP_BIT_AND): |
1047 | { | |
1048 | int64_t res; | |
1049 | ||
d644d1df FD |
1050 | if (!IS_INTEGER_REGISTER(estack_ax_t) || !IS_INTEGER_REGISTER(estack_bx_t)) { |
1051 | ret = -EINVAL; | |
1052 | goto end; | |
1053 | } | |
1054 | ||
f8d42740 | 1055 | res = ((uint64_t) estack_bx_v & (uint64_t) estack_ax_v); |
d644d1df | 1056 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
3834b99f | 1057 | estack_ax_v = res; |
1242217a | 1058 | estack_ax_t = REG_U64; |
3834b99f MD |
1059 | next_pc += sizeof(struct binary_op); |
1060 | PO; | |
1061 | } | |
1062 | OP(FILTER_OP_BIT_OR): | |
1063 | { | |
1064 | int64_t res; | |
1065 | ||
d644d1df FD |
1066 | if (!IS_INTEGER_REGISTER(estack_ax_t) || !IS_INTEGER_REGISTER(estack_bx_t)) { |
1067 | ret = -EINVAL; | |
1068 | goto end; | |
1069 | } | |
1070 | ||
f8d42740 | 1071 | res = ((uint64_t) estack_bx_v | (uint64_t) estack_ax_v); |
d644d1df | 1072 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
3834b99f | 1073 | estack_ax_v = res; |
1242217a | 1074 | estack_ax_t = REG_U64; |
3834b99f MD |
1075 | next_pc += sizeof(struct binary_op); |
1076 | PO; | |
1077 | } | |
1078 | OP(FILTER_OP_BIT_XOR): | |
1079 | { | |
1080 | int64_t res; | |
1081 | ||
d644d1df FD |
1082 | if (!IS_INTEGER_REGISTER(estack_ax_t) || !IS_INTEGER_REGISTER(estack_bx_t)) { |
1083 | ret = -EINVAL; | |
1084 | goto end; | |
1085 | } | |
1086 | ||
f8d42740 | 1087 | res = ((uint64_t) estack_bx_v ^ (uint64_t) estack_ax_v); |
d644d1df | 1088 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
3834b99f | 1089 | estack_ax_v = res; |
1242217a | 1090 | estack_ax_t = REG_U64; |
3834b99f MD |
1091 | next_pc += sizeof(struct binary_op); |
1092 | PO; | |
1093 | } | |
07dfc1d0 MD |
1094 | |
1095 | /* unary */ | |
1096 | OP(FILTER_OP_UNARY_PLUS): | |
1097 | OP(FILTER_OP_UNARY_MINUS): | |
1098 | OP(FILTER_OP_UNARY_NOT): | |
5a15f70c | 1099 | printk(KERN_WARNING "LTTng: filter: unsupported non-specialized bytecode op %u\n", |
07dfc1d0 MD |
1100 | (unsigned int) *(filter_opcode_t *) pc); |
1101 | ret = -EINVAL; | |
1102 | goto end; | |
1103 | ||
1104 | ||
e16c054b MD |
1105 | OP(FILTER_OP_UNARY_BIT_NOT): |
1106 | { | |
f8d42740 | 1107 | estack_ax_v = ~(uint64_t) estack_ax_v; |
d644d1df | 1108 | estack_ax_t = REG_S64; |
e16c054b MD |
1109 | next_pc += sizeof(struct unary_op); |
1110 | PO; | |
1111 | } | |
1112 | ||
07dfc1d0 MD |
1113 | OP(FILTER_OP_UNARY_PLUS_S64): |
1114 | { | |
1115 | next_pc += sizeof(struct unary_op); | |
1116 | PO; | |
1117 | } | |
1118 | OP(FILTER_OP_UNARY_MINUS_S64): | |
1119 | { | |
1120 | estack_ax_v = -estack_ax_v; | |
d644d1df | 1121 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
1122 | next_pc += sizeof(struct unary_op); |
1123 | PO; | |
1124 | } | |
1125 | OP(FILTER_OP_UNARY_PLUS_DOUBLE): | |
1126 | OP(FILTER_OP_UNARY_MINUS_DOUBLE): | |
1127 | { | |
1128 | BUG_ON(1); | |
1129 | PO; | |
1130 | } | |
1131 | OP(FILTER_OP_UNARY_NOT_S64): | |
1132 | { | |
1133 | estack_ax_v = !estack_ax_v; | |
d644d1df | 1134 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
1135 | next_pc += sizeof(struct unary_op); |
1136 | PO; | |
1137 | } | |
1138 | OP(FILTER_OP_UNARY_NOT_DOUBLE): | |
1139 | { | |
1140 | BUG_ON(1); | |
1141 | PO; | |
1142 | } | |
1143 | ||
1144 | /* logical */ | |
1145 | OP(FILTER_OP_AND): | |
1146 | { | |
1147 | struct logical_op *insn = (struct logical_op *) pc; | |
1148 | ||
1149 | /* If AX is 0, skip and evaluate to 0 */ | |
1150 | if (unlikely(estack_ax_v == 0)) { | |
1151 | dbg_printk("Jumping to bytecode offset %u\n", | |
1152 | (unsigned int) insn->skip_offset); | |
1153 | next_pc = start_pc + insn->skip_offset; | |
1154 | } else { | |
1155 | /* Pop 1 when jump not taken */ | |
d644d1df | 1156 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 MD |
1157 | next_pc += sizeof(struct logical_op); |
1158 | } | |
1159 | PO; | |
1160 | } | |
1161 | OP(FILTER_OP_OR): | |
1162 | { | |
1163 | struct logical_op *insn = (struct logical_op *) pc; | |
1164 | ||
1165 | /* If AX is nonzero, skip and evaluate to 1 */ | |
1166 | ||
1167 | if (unlikely(estack_ax_v != 0)) { | |
1168 | estack_ax_v = 1; | |
1169 | dbg_printk("Jumping to bytecode offset %u\n", | |
1170 | (unsigned int) insn->skip_offset); | |
1171 | next_pc = start_pc + insn->skip_offset; | |
1172 | } else { | |
1173 | /* Pop 1 when jump not taken */ | |
d644d1df | 1174 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 MD |
1175 | next_pc += sizeof(struct logical_op); |
1176 | } | |
1177 | PO; | |
1178 | } | |
1179 | ||
1180 | ||
1181 | /* load field ref */ | |
1182 | OP(FILTER_OP_LOAD_FIELD_REF_STRING): | |
1183 | { | |
1184 | struct load_op *insn = (struct load_op *) pc; | |
1185 | struct field_ref *ref = (struct field_ref *) insn->data; | |
1186 | ||
1187 | dbg_printk("load field ref offset %u type string\n", | |
1188 | ref->offset); | |
d644d1df | 1189 | estack_push(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 MD |
1190 | estack_ax(stack, top)->u.s.str = |
1191 | *(const char * const *) &filter_stack_data[ref->offset]; | |
1192 | if (unlikely(!estack_ax(stack, top)->u.s.str)) { | |
1193 | dbg_printk("Filter warning: loading a NULL string.\n"); | |
1194 | ret = -EINVAL; | |
1195 | goto end; | |
1196 | } | |
cbc19040 | 1197 | estack_ax(stack, top)->u.s.seq_len = LTTNG_SIZE_MAX; |
02aca193 PP |
1198 | estack_ax(stack, top)->u.s.literal_type = |
1199 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
f127e61e | 1200 | estack_ax(stack, top)->u.s.user = 0; |
d644d1df | 1201 | estack_ax(stack, top)->type = REG_STRING; |
07dfc1d0 MD |
1202 | dbg_printk("ref load string %s\n", estack_ax(stack, top)->u.s.str); |
1203 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
1204 | PO; | |
1205 | } | |
1206 | ||
1207 | OP(FILTER_OP_LOAD_FIELD_REF_SEQUENCE): | |
1208 | { | |
1209 | struct load_op *insn = (struct load_op *) pc; | |
1210 | struct field_ref *ref = (struct field_ref *) insn->data; | |
1211 | ||
1212 | dbg_printk("load field ref offset %u type sequence\n", | |
1213 | ref->offset); | |
d644d1df | 1214 | estack_push(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 MD |
1215 | estack_ax(stack, top)->u.s.seq_len = |
1216 | *(unsigned long *) &filter_stack_data[ref->offset]; | |
1217 | estack_ax(stack, top)->u.s.str = | |
1218 | *(const char **) (&filter_stack_data[ref->offset | |
1219 | + sizeof(unsigned long)]); | |
1220 | if (unlikely(!estack_ax(stack, top)->u.s.str)) { | |
1221 | dbg_printk("Filter warning: loading a NULL sequence.\n"); | |
1222 | ret = -EINVAL; | |
1223 | goto end; | |
1224 | } | |
02aca193 PP |
1225 | estack_ax(stack, top)->u.s.literal_type = |
1226 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
f127e61e | 1227 | estack_ax(stack, top)->u.s.user = 0; |
07dfc1d0 MD |
1228 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); |
1229 | PO; | |
1230 | } | |
1231 | ||
1232 | OP(FILTER_OP_LOAD_FIELD_REF_S64): | |
1233 | { | |
1234 | struct load_op *insn = (struct load_op *) pc; | |
1235 | struct field_ref *ref = (struct field_ref *) insn->data; | |
1236 | ||
1237 | dbg_printk("load field ref offset %u type s64\n", | |
1238 | ref->offset); | |
d644d1df | 1239 | estack_push(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 MD |
1240 | estack_ax_v = |
1241 | ((struct literal_numeric *) &filter_stack_data[ref->offset])->v; | |
d644d1df | 1242 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
1243 | dbg_printk("ref load s64 %lld\n", |
1244 | (long long) estack_ax_v); | |
1245 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
1246 | PO; | |
1247 | } | |
1248 | ||
1249 | OP(FILTER_OP_LOAD_FIELD_REF_DOUBLE): | |
1250 | { | |
1251 | BUG_ON(1); | |
1252 | PO; | |
1253 | } | |
1254 | ||
1255 | /* load from immediate operand */ | |
1256 | OP(FILTER_OP_LOAD_STRING): | |
1257 | { | |
1258 | struct load_op *insn = (struct load_op *) pc; | |
1259 | ||
1260 | dbg_printk("load string %s\n", insn->data); | |
d644d1df | 1261 | estack_push(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 1262 | estack_ax(stack, top)->u.s.str = insn->data; |
cbc19040 | 1263 | estack_ax(stack, top)->u.s.seq_len = LTTNG_SIZE_MAX; |
02aca193 PP |
1264 | estack_ax(stack, top)->u.s.literal_type = |
1265 | ESTACK_STRING_LITERAL_TYPE_PLAIN; | |
1266 | estack_ax(stack, top)->u.s.user = 0; | |
1267 | next_pc += sizeof(struct load_op) + strlen(insn->data) + 1; | |
1268 | PO; | |
1269 | } | |
1270 | ||
1271 | OP(FILTER_OP_LOAD_STAR_GLOB_STRING): | |
1272 | { | |
1273 | struct load_op *insn = (struct load_op *) pc; | |
1274 | ||
1275 | dbg_printk("load globbing pattern %s\n", insn->data); | |
d644d1df | 1276 | estack_push(stack, top, ax, bx, ax_t, bx_t); |
02aca193 | 1277 | estack_ax(stack, top)->u.s.str = insn->data; |
cbc19040 | 1278 | estack_ax(stack, top)->u.s.seq_len = LTTNG_SIZE_MAX; |
02aca193 PP |
1279 | estack_ax(stack, top)->u.s.literal_type = |
1280 | ESTACK_STRING_LITERAL_TYPE_STAR_GLOB; | |
f127e61e | 1281 | estack_ax(stack, top)->u.s.user = 0; |
07dfc1d0 MD |
1282 | next_pc += sizeof(struct load_op) + strlen(insn->data) + 1; |
1283 | PO; | |
1284 | } | |
1285 | ||
1286 | OP(FILTER_OP_LOAD_S64): | |
1287 | { | |
1288 | struct load_op *insn = (struct load_op *) pc; | |
1289 | ||
d644d1df | 1290 | estack_push(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 1291 | estack_ax_v = ((struct literal_numeric *) insn->data)->v; |
d644d1df | 1292 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
1293 | dbg_printk("load s64 %lld\n", |
1294 | (long long) estack_ax_v); | |
1295 | next_pc += sizeof(struct load_op) | |
1296 | + sizeof(struct literal_numeric); | |
1297 | PO; | |
1298 | } | |
1299 | ||
1300 | OP(FILTER_OP_LOAD_DOUBLE): | |
1301 | { | |
1302 | BUG_ON(1); | |
1303 | PO; | |
1304 | } | |
1305 | ||
1306 | /* cast */ | |
1307 | OP(FILTER_OP_CAST_TO_S64): | |
5a15f70c | 1308 | printk(KERN_WARNING "LTTng: filter: unsupported non-specialized bytecode op %u\n", |
07dfc1d0 MD |
1309 | (unsigned int) *(filter_opcode_t *) pc); |
1310 | ret = -EINVAL; | |
1311 | goto end; | |
1312 | ||
1313 | OP(FILTER_OP_CAST_DOUBLE_TO_S64): | |
1314 | { | |
1315 | BUG_ON(1); | |
1316 | PO; | |
1317 | } | |
1318 | ||
1319 | OP(FILTER_OP_CAST_NOP): | |
1320 | { | |
1321 | next_pc += sizeof(struct cast_op); | |
1322 | PO; | |
1323 | } | |
1324 | ||
1325 | /* get context ref */ | |
1326 | OP(FILTER_OP_GET_CONTEXT_REF_STRING): | |
1327 | { | |
1328 | struct load_op *insn = (struct load_op *) pc; | |
1329 | struct field_ref *ref = (struct field_ref *) insn->data; | |
1330 | struct lttng_ctx_field *ctx_field; | |
1331 | union lttng_ctx_value v; | |
1332 | ||
1333 | dbg_printk("get context ref offset %u type string\n", | |
1334 | ref->offset); | |
1335 | ctx_field = <tng_static_ctx->fields[ref->offset]; | |
79150a49 | 1336 | ctx_field->get_value(ctx_field, lttng_probe_ctx, &v); |
d644d1df | 1337 | estack_push(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 MD |
1338 | estack_ax(stack, top)->u.s.str = v.str; |
1339 | if (unlikely(!estack_ax(stack, top)->u.s.str)) { | |
1340 | dbg_printk("Filter warning: loading a NULL string.\n"); | |
1341 | ret = -EINVAL; | |
1342 | goto end; | |
1343 | } | |
cbc19040 | 1344 | estack_ax(stack, top)->u.s.seq_len = LTTNG_SIZE_MAX; |
02aca193 PP |
1345 | estack_ax(stack, top)->u.s.literal_type = |
1346 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
f127e61e | 1347 | estack_ax(stack, top)->u.s.user = 0; |
d644d1df | 1348 | estack_ax(stack, top)->type = REG_STRING; |
07dfc1d0 MD |
1349 | dbg_printk("ref get context string %s\n", estack_ax(stack, top)->u.s.str); |
1350 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
1351 | PO; | |
1352 | } | |
1353 | ||
1354 | OP(FILTER_OP_GET_CONTEXT_REF_S64): | |
1355 | { | |
1356 | struct load_op *insn = (struct load_op *) pc; | |
1357 | struct field_ref *ref = (struct field_ref *) insn->data; | |
1358 | struct lttng_ctx_field *ctx_field; | |
1359 | union lttng_ctx_value v; | |
1360 | ||
1361 | dbg_printk("get context ref offset %u type s64\n", | |
1362 | ref->offset); | |
1363 | ctx_field = <tng_static_ctx->fields[ref->offset]; | |
79150a49 | 1364 | ctx_field->get_value(ctx_field, lttng_probe_ctx, &v); |
d644d1df | 1365 | estack_push(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 1366 | estack_ax_v = v.s64; |
d644d1df | 1367 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
1368 | dbg_printk("ref get context s64 %lld\n", |
1369 | (long long) estack_ax_v); | |
1370 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
1371 | PO; | |
1372 | } | |
1373 | ||
1374 | OP(FILTER_OP_GET_CONTEXT_REF_DOUBLE): | |
1375 | { | |
1376 | BUG_ON(1); | |
1377 | PO; | |
1378 | } | |
1379 | ||
f127e61e MD |
1380 | /* load userspace field ref */ |
1381 | OP(FILTER_OP_LOAD_FIELD_REF_USER_STRING): | |
1382 | { | |
1383 | struct load_op *insn = (struct load_op *) pc; | |
1384 | struct field_ref *ref = (struct field_ref *) insn->data; | |
1385 | ||
1386 | dbg_printk("load field ref offset %u type user string\n", | |
1387 | ref->offset); | |
d644d1df | 1388 | estack_push(stack, top, ax, bx, ax_t, bx_t); |
5b4ad89f | 1389 | estack_ax(stack, top)->u.s.user_str = |
f127e61e MD |
1390 | *(const char * const *) &filter_stack_data[ref->offset]; |
1391 | if (unlikely(!estack_ax(stack, top)->u.s.str)) { | |
1392 | dbg_printk("Filter warning: loading a NULL string.\n"); | |
1393 | ret = -EINVAL; | |
1394 | goto end; | |
1395 | } | |
cbc19040 | 1396 | estack_ax(stack, top)->u.s.seq_len = LTTNG_SIZE_MAX; |
02aca193 PP |
1397 | estack_ax(stack, top)->u.s.literal_type = |
1398 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
f127e61e | 1399 | estack_ax(stack, top)->u.s.user = 1; |
d644d1df | 1400 | estack_ax(stack, top)->type = REG_STRING; |
f127e61e MD |
1401 | dbg_printk("ref load string %s\n", estack_ax(stack, top)->u.s.str); |
1402 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
1403 | PO; | |
1404 | } | |
1405 | ||
1406 | OP(FILTER_OP_LOAD_FIELD_REF_USER_SEQUENCE): | |
1407 | { | |
1408 | struct load_op *insn = (struct load_op *) pc; | |
1409 | struct field_ref *ref = (struct field_ref *) insn->data; | |
1410 | ||
1411 | dbg_printk("load field ref offset %u type user sequence\n", | |
1412 | ref->offset); | |
d644d1df | 1413 | estack_push(stack, top, ax, bx, ax_t, bx_t); |
f127e61e MD |
1414 | estack_ax(stack, top)->u.s.seq_len = |
1415 | *(unsigned long *) &filter_stack_data[ref->offset]; | |
5b4ad89f | 1416 | estack_ax(stack, top)->u.s.user_str = |
f127e61e MD |
1417 | *(const char **) (&filter_stack_data[ref->offset |
1418 | + sizeof(unsigned long)]); | |
1419 | if (unlikely(!estack_ax(stack, top)->u.s.str)) { | |
1420 | dbg_printk("Filter warning: loading a NULL sequence.\n"); | |
1421 | ret = -EINVAL; | |
1422 | goto end; | |
1423 | } | |
02aca193 PP |
1424 | estack_ax(stack, top)->u.s.literal_type = |
1425 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
f127e61e MD |
1426 | estack_ax(stack, top)->u.s.user = 1; |
1427 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
1428 | PO; | |
1429 | } | |
1430 | ||
3834b99f MD |
1431 | OP(FILTER_OP_GET_CONTEXT_ROOT): |
1432 | { | |
1433 | dbg_printk("op get context root\n"); | |
d644d1df | 1434 | estack_push(stack, top, ax, bx, ax_t, bx_t); |
3834b99f MD |
1435 | estack_ax(stack, top)->u.ptr.type = LOAD_ROOT_CONTEXT; |
1436 | /* "field" only needed for variants. */ | |
1437 | estack_ax(stack, top)->u.ptr.field = NULL; | |
d644d1df | 1438 | estack_ax(stack, top)->type = REG_PTR; |
3834b99f MD |
1439 | next_pc += sizeof(struct load_op); |
1440 | PO; | |
1441 | } | |
1442 | ||
1443 | OP(FILTER_OP_GET_APP_CONTEXT_ROOT): | |
1444 | { | |
1445 | BUG_ON(1); | |
1446 | PO; | |
1447 | } | |
1448 | ||
1449 | OP(FILTER_OP_GET_PAYLOAD_ROOT): | |
1450 | { | |
1451 | dbg_printk("op get app payload root\n"); | |
d644d1df | 1452 | estack_push(stack, top, ax, bx, ax_t, bx_t); |
3834b99f MD |
1453 | estack_ax(stack, top)->u.ptr.type = LOAD_ROOT_PAYLOAD; |
1454 | estack_ax(stack, top)->u.ptr.ptr = filter_stack_data; | |
1455 | /* "field" only needed for variants. */ | |
1456 | estack_ax(stack, top)->u.ptr.field = NULL; | |
d644d1df | 1457 | estack_ax(stack, top)->type = REG_PTR; |
3834b99f MD |
1458 | next_pc += sizeof(struct load_op); |
1459 | PO; | |
1460 | } | |
1461 | ||
1462 | OP(FILTER_OP_GET_SYMBOL): | |
1463 | { | |
1464 | dbg_printk("op get symbol\n"); | |
1465 | switch (estack_ax(stack, top)->u.ptr.type) { | |
1466 | case LOAD_OBJECT: | |
5a15f70c | 1467 | printk(KERN_WARNING "LTTng: filter: Nested fields not implemented yet.\n"); |
3834b99f MD |
1468 | ret = -EINVAL; |
1469 | goto end; | |
1470 | case LOAD_ROOT_CONTEXT: | |
1471 | case LOAD_ROOT_APP_CONTEXT: | |
1472 | case LOAD_ROOT_PAYLOAD: | |
1473 | /* | |
1474 | * symbol lookup is performed by | |
1475 | * specialization. | |
1476 | */ | |
1477 | ret = -EINVAL; | |
1478 | goto end; | |
1479 | } | |
1480 | next_pc += sizeof(struct load_op) + sizeof(struct get_symbol); | |
1481 | PO; | |
1482 | } | |
1483 | ||
1484 | OP(FILTER_OP_GET_SYMBOL_FIELD): | |
1485 | { | |
1486 | /* | |
1487 | * Used for first variant encountered in a | |
1488 | * traversal. Variants are not implemented yet. | |
1489 | */ | |
1490 | ret = -EINVAL; | |
1491 | goto end; | |
1492 | } | |
1493 | ||
1494 | OP(FILTER_OP_GET_INDEX_U16): | |
1495 | { | |
1496 | struct load_op *insn = (struct load_op *) pc; | |
1497 | struct get_index_u16 *index = (struct get_index_u16 *) insn->data; | |
1498 | ||
1499 | dbg_printk("op get index u16\n"); | |
1500 | ret = dynamic_get_index(lttng_probe_ctx, bytecode, index->index, estack_ax(stack, top)); | |
1501 | if (ret) | |
1502 | goto end; | |
1503 | estack_ax_v = estack_ax(stack, top)->u.v; | |
d644d1df | 1504 | estack_ax_t = estack_ax(stack, top)->type; |
3834b99f MD |
1505 | next_pc += sizeof(struct load_op) + sizeof(struct get_index_u16); |
1506 | PO; | |
1507 | } | |
1508 | ||
1509 | OP(FILTER_OP_GET_INDEX_U64): | |
1510 | { | |
1511 | struct load_op *insn = (struct load_op *) pc; | |
1512 | struct get_index_u64 *index = (struct get_index_u64 *) insn->data; | |
1513 | ||
1514 | dbg_printk("op get index u64\n"); | |
1515 | ret = dynamic_get_index(lttng_probe_ctx, bytecode, index->index, estack_ax(stack, top)); | |
1516 | if (ret) | |
1517 | goto end; | |
1518 | estack_ax_v = estack_ax(stack, top)->u.v; | |
d644d1df | 1519 | estack_ax_t = estack_ax(stack, top)->type; |
3834b99f MD |
1520 | next_pc += sizeof(struct load_op) + sizeof(struct get_index_u64); |
1521 | PO; | |
1522 | } | |
1523 | ||
1524 | OP(FILTER_OP_LOAD_FIELD): | |
1525 | { | |
1526 | dbg_printk("op load field\n"); | |
1527 | ret = dynamic_load_field(estack_ax(stack, top)); | |
1528 | if (ret) | |
1529 | goto end; | |
1530 | estack_ax_v = estack_ax(stack, top)->u.v; | |
d644d1df | 1531 | estack_ax_t = estack_ax(stack, top)->type; |
3834b99f MD |
1532 | next_pc += sizeof(struct load_op); |
1533 | PO; | |
1534 | } | |
1535 | ||
1536 | OP(FILTER_OP_LOAD_FIELD_S8): | |
1537 | { | |
1538 | dbg_printk("op load field s8\n"); | |
1539 | ||
1540 | estack_ax_v = *(int8_t *) estack_ax(stack, top)->u.ptr.ptr; | |
d644d1df | 1541 | estack_ax_t = REG_S64; |
3834b99f MD |
1542 | next_pc += sizeof(struct load_op); |
1543 | PO; | |
1544 | } | |
1545 | OP(FILTER_OP_LOAD_FIELD_S16): | |
1546 | { | |
1547 | dbg_printk("op load field s16\n"); | |
1548 | ||
1549 | estack_ax_v = *(int16_t *) estack_ax(stack, top)->u.ptr.ptr; | |
d644d1df | 1550 | estack_ax_t = REG_S64; |
3834b99f MD |
1551 | next_pc += sizeof(struct load_op); |
1552 | PO; | |
1553 | } | |
1554 | OP(FILTER_OP_LOAD_FIELD_S32): | |
1555 | { | |
1556 | dbg_printk("op load field s32\n"); | |
1557 | ||
1558 | estack_ax_v = *(int32_t *) estack_ax(stack, top)->u.ptr.ptr; | |
d644d1df | 1559 | estack_ax_t = REG_S64; |
3834b99f MD |
1560 | next_pc += sizeof(struct load_op); |
1561 | PO; | |
1562 | } | |
1563 | OP(FILTER_OP_LOAD_FIELD_S64): | |
1564 | { | |
1565 | dbg_printk("op load field s64\n"); | |
1566 | ||
1567 | estack_ax_v = *(int64_t *) estack_ax(stack, top)->u.ptr.ptr; | |
d644d1df | 1568 | estack_ax_t = REG_S64; |
3834b99f MD |
1569 | next_pc += sizeof(struct load_op); |
1570 | PO; | |
1571 | } | |
1572 | OP(FILTER_OP_LOAD_FIELD_U8): | |
1573 | { | |
1574 | dbg_printk("op load field u8\n"); | |
1575 | ||
1576 | estack_ax_v = *(uint8_t *) estack_ax(stack, top)->u.ptr.ptr; | |
d644d1df | 1577 | estack_ax_t = REG_S64; |
3834b99f MD |
1578 | next_pc += sizeof(struct load_op); |
1579 | PO; | |
1580 | } | |
1581 | OP(FILTER_OP_LOAD_FIELD_U16): | |
1582 | { | |
1583 | dbg_printk("op load field u16\n"); | |
1584 | ||
1585 | estack_ax_v = *(uint16_t *) estack_ax(stack, top)->u.ptr.ptr; | |
d644d1df | 1586 | estack_ax_t = REG_S64; |
3834b99f MD |
1587 | next_pc += sizeof(struct load_op); |
1588 | PO; | |
1589 | } | |
1590 | OP(FILTER_OP_LOAD_FIELD_U32): | |
1591 | { | |
1592 | dbg_printk("op load field u32\n"); | |
1593 | ||
1594 | estack_ax_v = *(uint32_t *) estack_ax(stack, top)->u.ptr.ptr; | |
d644d1df | 1595 | estack_ax_t = REG_S64; |
3834b99f MD |
1596 | next_pc += sizeof(struct load_op); |
1597 | PO; | |
1598 | } | |
1599 | OP(FILTER_OP_LOAD_FIELD_U64): | |
1600 | { | |
1601 | dbg_printk("op load field u64\n"); | |
1602 | ||
1603 | estack_ax_v = *(uint64_t *) estack_ax(stack, top)->u.ptr.ptr; | |
d644d1df | 1604 | estack_ax_t = REG_S64; |
3834b99f MD |
1605 | next_pc += sizeof(struct load_op); |
1606 | PO; | |
1607 | } | |
1608 | OP(FILTER_OP_LOAD_FIELD_DOUBLE): | |
1609 | { | |
1610 | ret = -EINVAL; | |
1611 | goto end; | |
1612 | } | |
1613 | ||
1614 | OP(FILTER_OP_LOAD_FIELD_STRING): | |
1615 | { | |
1616 | const char *str; | |
1617 | ||
1618 | dbg_printk("op load field string\n"); | |
1619 | str = (const char *) estack_ax(stack, top)->u.ptr.ptr; | |
1620 | estack_ax(stack, top)->u.s.str = str; | |
1621 | if (unlikely(!estack_ax(stack, top)->u.s.str)) { | |
1622 | dbg_printk("Filter warning: loading a NULL string.\n"); | |
1623 | ret = -EINVAL; | |
1624 | goto end; | |
1625 | } | |
4efe037b | 1626 | estack_ax(stack, top)->u.s.seq_len = LTTNG_SIZE_MAX; |
3834b99f MD |
1627 | estack_ax(stack, top)->u.s.literal_type = |
1628 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
d644d1df | 1629 | estack_ax(stack, top)->type = REG_STRING; |
3834b99f MD |
1630 | next_pc += sizeof(struct load_op); |
1631 | PO; | |
1632 | } | |
1633 | ||
1634 | OP(FILTER_OP_LOAD_FIELD_SEQUENCE): | |
1635 | { | |
1636 | const char *ptr; | |
1637 | ||
1638 | dbg_printk("op load field string sequence\n"); | |
1639 | ptr = estack_ax(stack, top)->u.ptr.ptr; | |
1640 | estack_ax(stack, top)->u.s.seq_len = *(unsigned long *) ptr; | |
1641 | estack_ax(stack, top)->u.s.str = *(const char **) (ptr + sizeof(unsigned long)); | |
1642 | if (unlikely(!estack_ax(stack, top)->u.s.str)) { | |
1643 | dbg_printk("Filter warning: loading a NULL sequence.\n"); | |
1644 | ret = -EINVAL; | |
1645 | goto end; | |
1646 | } | |
1647 | estack_ax(stack, top)->u.s.literal_type = | |
1648 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
d644d1df | 1649 | estack_ax(stack, top)->type = REG_STRING; |
3834b99f MD |
1650 | next_pc += sizeof(struct load_op); |
1651 | PO; | |
1652 | } | |
1653 | ||
07dfc1d0 MD |
1654 | END_OP |
1655 | end: | |
a93d4e71 | 1656 | /* Return _DISCARD on error. */ |
07dfc1d0 | 1657 | if (ret) |
a93d4e71 | 1658 | return LTTNG_FILTER_DISCARD; |
07dfc1d0 MD |
1659 | return retval; |
1660 | } | |
1661 | ||
1662 | #undef START_OP | |
1663 | #undef OP | |
1664 | #undef PO | |
1665 | #undef END_OP |