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 | |
f127e61e MD |
18 | /* |
19 | * get_char should be called with page fault handler disabled if it is expected | |
20 | * to handle user-space read. | |
21 | */ | |
22 | static | |
23 | char get_char(struct estack_entry *reg, size_t offset) | |
24 | { | |
25 | if (unlikely(offset >= reg->u.s.seq_len)) | |
26 | return '\0'; | |
27 | if (reg->u.s.user) { | |
28 | char c; | |
29 | ||
30 | /* Handle invalid access as end of string. */ | |
80bb2600 | 31 | if (unlikely(!lttng_access_ok(VERIFY_READ, |
f127e61e MD |
32 | reg->u.s.user_str + offset, |
33 | sizeof(c)))) | |
34 | return '\0'; | |
35 | /* Handle fault (nonzero return value) as end of string. */ | |
36 | if (unlikely(__copy_from_user_inatomic(&c, | |
37 | reg->u.s.user_str + offset, | |
38 | sizeof(c)))) | |
39 | return '\0'; | |
40 | return c; | |
41 | } else { | |
42 | return reg->u.s.str[offset]; | |
43 | } | |
44 | } | |
45 | ||
07dfc1d0 MD |
46 | /* |
47 | * -1: wildcard found. | |
48 | * -2: unknown escape char. | |
49 | * 0: normal char. | |
50 | */ | |
07dfc1d0 | 51 | static |
f127e61e | 52 | int parse_char(struct estack_entry *reg, char *c, size_t *offset) |
07dfc1d0 | 53 | { |
f127e61e | 54 | switch (*c) { |
07dfc1d0 | 55 | case '\\': |
f127e61e MD |
56 | (*offset)++; |
57 | *c = get_char(reg, *offset); | |
58 | switch (*c) { | |
07dfc1d0 MD |
59 | case '\\': |
60 | case '*': | |
61 | return 0; | |
62 | default: | |
63 | return -2; | |
64 | } | |
65 | case '*': | |
66 | return -1; | |
67 | default: | |
68 | return 0; | |
69 | } | |
70 | } | |
71 | ||
02aca193 PP |
72 | static |
73 | char get_char_at_cb(size_t at, void *data) | |
74 | { | |
75 | return get_char(data, at); | |
76 | } | |
77 | ||
78 | static | |
79 | int stack_star_glob_match(struct estack *stack, int top, const char *cmp_type) | |
80 | { | |
81 | bool has_user = false; | |
02aca193 PP |
82 | int result; |
83 | struct estack_entry *pattern_reg; | |
84 | struct estack_entry *candidate_reg; | |
85 | ||
6f192a16 | 86 | /* Disable the page fault handler when reading from userspace. */ |
02aca193 PP |
87 | if (estack_bx(stack, top)->u.s.user |
88 | || estack_ax(stack, top)->u.s.user) { | |
89 | has_user = true; | |
02aca193 PP |
90 | pagefault_disable(); |
91 | } | |
92 | ||
93 | /* Find out which side is the pattern vs. the candidate. */ | |
94 | if (estack_ax(stack, top)->u.s.literal_type == ESTACK_STRING_LITERAL_TYPE_STAR_GLOB) { | |
95 | pattern_reg = estack_ax(stack, top); | |
96 | candidate_reg = estack_bx(stack, top); | |
97 | } else { | |
98 | pattern_reg = estack_bx(stack, top); | |
99 | candidate_reg = estack_ax(stack, top); | |
100 | } | |
101 | ||
102 | /* Perform the match operation. */ | |
103 | result = !strutils_star_glob_match_char_cb(get_char_at_cb, | |
104 | pattern_reg, get_char_at_cb, candidate_reg); | |
6f192a16 | 105 | if (has_user) |
02aca193 | 106 | pagefault_enable(); |
02aca193 PP |
107 | |
108 | return result; | |
109 | } | |
110 | ||
07dfc1d0 MD |
111 | static |
112 | int stack_strcmp(struct estack *stack, int top, const char *cmp_type) | |
113 | { | |
f127e61e MD |
114 | size_t offset_bx = 0, offset_ax = 0; |
115 | int diff, has_user = 0; | |
f127e61e MD |
116 | |
117 | if (estack_bx(stack, top)->u.s.user | |
118 | || estack_ax(stack, top)->u.s.user) { | |
119 | has_user = 1; | |
f127e61e MD |
120 | pagefault_disable(); |
121 | } | |
07dfc1d0 MD |
122 | |
123 | for (;;) { | |
f127e61e | 124 | int ret; |
07dfc1d0 | 125 | int escaped_r0 = 0; |
f127e61e | 126 | char char_bx, char_ax; |
07dfc1d0 | 127 | |
f127e61e MD |
128 | char_bx = get_char(estack_bx(stack, top), offset_bx); |
129 | char_ax = get_char(estack_ax(stack, top), offset_ax); | |
130 | ||
131 | if (unlikely(char_bx == '\0')) { | |
132 | if (char_ax == '\0') { | |
133 | diff = 0; | |
134 | break; | |
07dfc1d0 | 135 | } else { |
02aca193 PP |
136 | if (estack_ax(stack, top)->u.s.literal_type == |
137 | ESTACK_STRING_LITERAL_TYPE_PLAIN) { | |
f127e61e MD |
138 | ret = parse_char(estack_ax(stack, top), |
139 | &char_ax, &offset_ax); | |
140 | if (ret == -1) { | |
141 | diff = 0; | |
142 | break; | |
143 | } | |
07dfc1d0 | 144 | } |
f127e61e MD |
145 | diff = -1; |
146 | break; | |
07dfc1d0 MD |
147 | } |
148 | } | |
f127e61e | 149 | if (unlikely(char_ax == '\0')) { |
02aca193 PP |
150 | if (estack_bx(stack, top)->u.s.literal_type == |
151 | ESTACK_STRING_LITERAL_TYPE_PLAIN) { | |
abfd272b MD |
152 | ret = parse_char(estack_bx(stack, top), |
153 | &char_bx, &offset_bx); | |
154 | if (ret == -1) { | |
155 | diff = 0; | |
156 | break; | |
07dfc1d0 | 157 | } |
07dfc1d0 | 158 | } |
abfd272b MD |
159 | diff = 1; |
160 | break; | |
07dfc1d0 | 161 | } |
02aca193 PP |
162 | if (estack_bx(stack, top)->u.s.literal_type == |
163 | ESTACK_STRING_LITERAL_TYPE_PLAIN) { | |
f127e61e MD |
164 | ret = parse_char(estack_bx(stack, top), |
165 | &char_bx, &offset_bx); | |
07dfc1d0 | 166 | if (ret == -1) { |
f127e61e MD |
167 | diff = 0; |
168 | break; | |
07dfc1d0 MD |
169 | } else if (ret == -2) { |
170 | escaped_r0 = 1; | |
171 | } | |
172 | /* else compare both char */ | |
173 | } | |
02aca193 PP |
174 | if (estack_ax(stack, top)->u.s.literal_type == |
175 | ESTACK_STRING_LITERAL_TYPE_PLAIN) { | |
f127e61e MD |
176 | ret = parse_char(estack_ax(stack, top), |
177 | &char_ax, &offset_ax); | |
07dfc1d0 | 178 | if (ret == -1) { |
f127e61e MD |
179 | diff = 0; |
180 | break; | |
07dfc1d0 | 181 | } else if (ret == -2) { |
f127e61e MD |
182 | if (!escaped_r0) { |
183 | diff = -1; | |
184 | break; | |
185 | } | |
07dfc1d0 | 186 | } else { |
f127e61e MD |
187 | if (escaped_r0) { |
188 | diff = 1; | |
189 | break; | |
190 | } | |
07dfc1d0 MD |
191 | } |
192 | } else { | |
f127e61e MD |
193 | if (escaped_r0) { |
194 | diff = 1; | |
195 | break; | |
196 | } | |
07dfc1d0 | 197 | } |
f127e61e | 198 | diff = char_bx - char_ax; |
07dfc1d0 MD |
199 | if (diff != 0) |
200 | break; | |
f127e61e MD |
201 | offset_bx++; |
202 | offset_ax++; | |
203 | } | |
6f192a16 | 204 | if (has_user) |
f127e61e | 205 | pagefault_enable(); |
6f192a16 | 206 | |
07dfc1d0 MD |
207 | return diff; |
208 | } | |
209 | ||
03cb0cdd | 210 | uint64_t lttng_filter_interpret_bytecode_false(void *filter_data, |
79150a49 | 211 | struct lttng_probe_ctx *lttng_probe_ctx, |
07dfc1d0 MD |
212 | const char *filter_stack_data) |
213 | { | |
a93d4e71 | 214 | return LTTNG_FILTER_DISCARD; |
07dfc1d0 MD |
215 | } |
216 | ||
217 | #ifdef INTERPRETER_USE_SWITCH | |
218 | ||
219 | /* | |
220 | * Fallback for compilers that do not support taking address of labels. | |
221 | */ | |
222 | ||
223 | #define START_OP \ | |
224 | start_pc = &bytecode->data[0]; \ | |
225 | for (pc = next_pc = start_pc; pc - start_pc < bytecode->len; \ | |
226 | pc = next_pc) { \ | |
5a15f70c | 227 | dbg_printk("LTTng: Executing op %s (%u)\n", \ |
07dfc1d0 MD |
228 | lttng_filter_print_op((unsigned int) *(filter_opcode_t *) pc), \ |
229 | (unsigned int) *(filter_opcode_t *) pc); \ | |
230 | switch (*(filter_opcode_t *) pc) { | |
231 | ||
232 | #define OP(name) case name | |
233 | ||
234 | #define PO break | |
235 | ||
236 | #define END_OP } \ | |
237 | } | |
238 | ||
239 | #else | |
240 | ||
241 | /* | |
242 | * Dispatch-table based interpreter. | |
243 | */ | |
244 | ||
245 | #define START_OP \ | |
3834b99f | 246 | start_pc = &bytecode->code[0]; \ |
07dfc1d0 MD |
247 | pc = next_pc = start_pc; \ |
248 | if (unlikely(pc - start_pc >= bytecode->len)) \ | |
249 | goto end; \ | |
250 | goto *dispatch[*(filter_opcode_t *) pc]; | |
251 | ||
252 | #define OP(name) \ | |
253 | LABEL_##name | |
254 | ||
255 | #define PO \ | |
256 | pc = next_pc; \ | |
257 | goto *dispatch[*(filter_opcode_t *) pc]; | |
258 | ||
259 | #define END_OP | |
260 | ||
261 | #endif | |
262 | ||
1242217a FD |
263 | #define IS_INTEGER_REGISTER(reg_type) \ |
264 | (reg_type == REG_S64 || reg_type == REG_U64) | |
d644d1df | 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); | |
ceabb767 | 284 | if (field->type.u.integer.signedness) { |
3834b99f MD |
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 | } | |
293 | break; | |
ceabb767 | 294 | case atype_enum_nestable: |
3834b99f MD |
295 | { |
296 | const struct lttng_integer_type *itype = | |
ceabb767 | 297 | &field->type.u.enum_nestable.container_type->u.integer; |
3834b99f MD |
298 | |
299 | ctx_field->get_value(ctx_field, lttng_probe_ctx, &v); | |
300 | if (itype->signedness) { | |
301 | ptr->object_type = OBJECT_TYPE_S64; | |
302 | ptr->u.s64 = v.s64; | |
303 | ptr->ptr = &ptr->u.s64; | |
304 | } else { | |
305 | ptr->object_type = OBJECT_TYPE_U64; | |
306 | ptr->u.u64 = v.s64; /* Cast. */ | |
307 | ptr->ptr = &ptr->u.u64; | |
308 | } | |
309 | break; | |
310 | } | |
ceabb767 MD |
311 | case atype_array_nestable: |
312 | if (!lttng_is_bytewise_integer(field->type.u.array_nestable.elem_type)) { | |
5a15f70c | 313 | printk(KERN_WARNING "LTTng: filter: Array nesting only supports integer types.\n"); |
3834b99f MD |
314 | return -EINVAL; |
315 | } | |
ceabb767 | 316 | if (field->type.u.array_nestable.elem_type->u.integer.encoding == lttng_encode_none) { |
5a15f70c | 317 | printk(KERN_WARNING "LTTng: filter: Only string arrays are supported for contexts.\n"); |
3834b99f MD |
318 | return -EINVAL; |
319 | } | |
320 | ptr->object_type = OBJECT_TYPE_STRING; | |
321 | ctx_field->get_value(ctx_field, lttng_probe_ctx, &v); | |
322 | ptr->ptr = v.str; | |
323 | break; | |
ceabb767 MD |
324 | case atype_sequence_nestable: |
325 | if (!lttng_is_bytewise_integer(field->type.u.sequence_nestable.elem_type)) { | |
5a15f70c | 326 | printk(KERN_WARNING "LTTng: filter: Sequence nesting only supports integer types.\n"); |
3834b99f MD |
327 | return -EINVAL; |
328 | } | |
ceabb767 | 329 | if (field->type.u.sequence_nestable.elem_type->u.integer.encoding == lttng_encode_none) { |
5a15f70c | 330 | printk(KERN_WARNING "LTTng: filter: Only string sequences are supported for contexts.\n"); |
3834b99f MD |
331 | return -EINVAL; |
332 | } | |
333 | ptr->object_type = OBJECT_TYPE_STRING; | |
334 | ctx_field->get_value(ctx_field, lttng_probe_ctx, &v); | |
335 | ptr->ptr = v.str; | |
336 | break; | |
3834b99f MD |
337 | case atype_string: |
338 | ptr->object_type = OBJECT_TYPE_STRING; | |
339 | ctx_field->get_value(ctx_field, lttng_probe_ctx, &v); | |
340 | ptr->ptr = v.str; | |
341 | break; | |
ceabb767 | 342 | case atype_struct_nestable: |
5a15f70c | 343 | printk(KERN_WARNING "LTTng: filter: Structure type cannot be loaded.\n"); |
3834b99f | 344 | return -EINVAL; |
ceabb767 | 345 | case atype_variant_nestable: |
5a15f70c | 346 | printk(KERN_WARNING "LTTng: filter: Variant type cannot be loaded.\n"); |
ceabb767 | 347 | return -EINVAL; |
3834b99f | 348 | default: |
5a15f70c | 349 | printk(KERN_WARNING "LTTng: filter: Unknown type: %d", (int) field->type.atype); |
3834b99f MD |
350 | return -EINVAL; |
351 | } | |
352 | return 0; | |
353 | } | |
354 | ||
355 | static int dynamic_get_index(struct lttng_probe_ctx *lttng_probe_ctx, | |
356 | struct bytecode_runtime *runtime, | |
357 | uint64_t index, struct estack_entry *stack_top) | |
358 | { | |
359 | int ret; | |
360 | const struct filter_get_index_data *gid; | |
361 | ||
3834b99f MD |
362 | gid = (const struct filter_get_index_data *) &runtime->data[index]; |
363 | switch (stack_top->u.ptr.type) { | |
364 | case LOAD_OBJECT: | |
365 | switch (stack_top->u.ptr.object_type) { | |
366 | case OBJECT_TYPE_ARRAY: | |
367 | { | |
368 | const char *ptr; | |
369 | ||
370 | WARN_ON_ONCE(gid->offset >= gid->array_len); | |
371 | /* Skip count (unsigned long) */ | |
372 | ptr = *(const char **) (stack_top->u.ptr.ptr + sizeof(unsigned long)); | |
373 | ptr = ptr + gid->offset; | |
374 | stack_top->u.ptr.ptr = ptr; | |
375 | stack_top->u.ptr.object_type = gid->elem.type; | |
376 | stack_top->u.ptr.rev_bo = gid->elem.rev_bo; | |
03cb0cdd | 377 | BUG_ON(stack_top->u.ptr.field->type.atype != atype_array_nestable); |
3834b99f MD |
378 | stack_top->u.ptr.field = NULL; |
379 | break; | |
380 | } | |
381 | case OBJECT_TYPE_SEQUENCE: | |
382 | { | |
383 | const char *ptr; | |
384 | size_t ptr_seq_len; | |
385 | ||
386 | ptr = *(const char **) (stack_top->u.ptr.ptr + sizeof(unsigned long)); | |
387 | ptr_seq_len = *(unsigned long *) stack_top->u.ptr.ptr; | |
388 | if (gid->offset >= gid->elem.len * ptr_seq_len) { | |
389 | ret = -EINVAL; | |
390 | goto end; | |
391 | } | |
392 | ptr = ptr + gid->offset; | |
393 | stack_top->u.ptr.ptr = ptr; | |
394 | stack_top->u.ptr.object_type = gid->elem.type; | |
395 | stack_top->u.ptr.rev_bo = gid->elem.rev_bo; | |
03cb0cdd | 396 | BUG_ON(stack_top->u.ptr.field->type.atype != atype_sequence_nestable); |
3834b99f MD |
397 | stack_top->u.ptr.field = NULL; |
398 | break; | |
399 | } | |
400 | case OBJECT_TYPE_STRUCT: | |
5a15f70c | 401 | printk(KERN_WARNING "LTTng: filter: Nested structures are not supported yet.\n"); |
3834b99f MD |
402 | ret = -EINVAL; |
403 | goto end; | |
404 | case OBJECT_TYPE_VARIANT: | |
405 | default: | |
5a15f70c | 406 | printk(KERN_WARNING "LTTng: filter: Unexpected get index type %d", |
3834b99f MD |
407 | (int) stack_top->u.ptr.object_type); |
408 | ret = -EINVAL; | |
409 | goto end; | |
410 | } | |
411 | break; | |
412 | case LOAD_ROOT_CONTEXT: | |
413 | case LOAD_ROOT_APP_CONTEXT: /* Fall-through */ | |
414 | { | |
415 | ret = context_get_index(lttng_probe_ctx, | |
416 | &stack_top->u.ptr, | |
417 | gid->ctx_index); | |
418 | if (ret) { | |
419 | goto end; | |
420 | } | |
421 | break; | |
422 | } | |
423 | case LOAD_ROOT_PAYLOAD: | |
424 | stack_top->u.ptr.ptr += gid->offset; | |
425 | if (gid->elem.type == OBJECT_TYPE_STRING) | |
426 | stack_top->u.ptr.ptr = *(const char * const *) stack_top->u.ptr.ptr; | |
427 | stack_top->u.ptr.object_type = gid->elem.type; | |
428 | stack_top->u.ptr.type = LOAD_OBJECT; | |
03cb0cdd | 429 | stack_top->u.ptr.field = gid->field; |
3834b99f MD |
430 | break; |
431 | } | |
196e531f FD |
432 | |
433 | stack_top->type = REG_PTR; | |
434 | ||
3834b99f MD |
435 | return 0; |
436 | ||
437 | end: | |
438 | return ret; | |
439 | } | |
440 | ||
441 | static int dynamic_load_field(struct estack_entry *stack_top) | |
442 | { | |
443 | int ret; | |
444 | ||
445 | switch (stack_top->u.ptr.type) { | |
446 | case LOAD_OBJECT: | |
447 | break; | |
448 | case LOAD_ROOT_CONTEXT: | |
449 | case LOAD_ROOT_APP_CONTEXT: | |
450 | case LOAD_ROOT_PAYLOAD: | |
451 | default: | |
452 | dbg_printk("Filter warning: cannot load root, missing field name.\n"); | |
453 | ret = -EINVAL; | |
454 | goto end; | |
455 | } | |
456 | switch (stack_top->u.ptr.object_type) { | |
457 | case OBJECT_TYPE_S8: | |
458 | dbg_printk("op load field s8\n"); | |
459 | stack_top->u.v = *(int8_t *) stack_top->u.ptr.ptr; | |
d644d1df | 460 | stack_top->type = REG_S64; |
3834b99f MD |
461 | break; |
462 | case OBJECT_TYPE_S16: | |
463 | { | |
464 | int16_t tmp; | |
465 | ||
466 | dbg_printk("op load field s16\n"); | |
467 | tmp = *(int16_t *) stack_top->u.ptr.ptr; | |
468 | if (stack_top->u.ptr.rev_bo) | |
469 | __swab16s(&tmp); | |
470 | stack_top->u.v = tmp; | |
d644d1df | 471 | stack_top->type = REG_S64; |
3834b99f MD |
472 | break; |
473 | } | |
474 | case OBJECT_TYPE_S32: | |
475 | { | |
476 | int32_t tmp; | |
477 | ||
478 | dbg_printk("op load field s32\n"); | |
479 | tmp = *(int32_t *) stack_top->u.ptr.ptr; | |
480 | if (stack_top->u.ptr.rev_bo) | |
481 | __swab32s(&tmp); | |
482 | stack_top->u.v = tmp; | |
d644d1df | 483 | stack_top->type = REG_S64; |
3834b99f MD |
484 | break; |
485 | } | |
486 | case OBJECT_TYPE_S64: | |
487 | { | |
488 | int64_t tmp; | |
489 | ||
490 | dbg_printk("op load field s64\n"); | |
491 | tmp = *(int64_t *) stack_top->u.ptr.ptr; | |
492 | if (stack_top->u.ptr.rev_bo) | |
493 | __swab64s(&tmp); | |
494 | stack_top->u.v = tmp; | |
d644d1df | 495 | stack_top->type = REG_S64; |
3834b99f MD |
496 | break; |
497 | } | |
498 | case OBJECT_TYPE_U8: | |
499 | dbg_printk("op load field u8\n"); | |
500 | stack_top->u.v = *(uint8_t *) stack_top->u.ptr.ptr; | |
1242217a | 501 | stack_top->type = REG_U64; |
3834b99f MD |
502 | break; |
503 | case OBJECT_TYPE_U16: | |
504 | { | |
505 | uint16_t tmp; | |
506 | ||
5fae98f7 | 507 | dbg_printk("op load field u16\n"); |
3834b99f MD |
508 | tmp = *(uint16_t *) stack_top->u.ptr.ptr; |
509 | if (stack_top->u.ptr.rev_bo) | |
510 | __swab16s(&tmp); | |
511 | stack_top->u.v = tmp; | |
1242217a | 512 | stack_top->type = REG_U64; |
3834b99f MD |
513 | break; |
514 | } | |
515 | case OBJECT_TYPE_U32: | |
516 | { | |
517 | uint32_t tmp; | |
518 | ||
519 | dbg_printk("op load field u32\n"); | |
520 | tmp = *(uint32_t *) stack_top->u.ptr.ptr; | |
521 | if (stack_top->u.ptr.rev_bo) | |
522 | __swab32s(&tmp); | |
523 | stack_top->u.v = tmp; | |
1242217a | 524 | stack_top->type = REG_U64; |
3834b99f MD |
525 | break; |
526 | } | |
527 | case OBJECT_TYPE_U64: | |
528 | { | |
529 | uint64_t tmp; | |
530 | ||
531 | dbg_printk("op load field u64\n"); | |
532 | tmp = *(uint64_t *) stack_top->u.ptr.ptr; | |
533 | if (stack_top->u.ptr.rev_bo) | |
534 | __swab64s(&tmp); | |
535 | stack_top->u.v = tmp; | |
1242217a | 536 | stack_top->type = REG_U64; |
3834b99f MD |
537 | break; |
538 | } | |
539 | case OBJECT_TYPE_STRING: | |
540 | { | |
541 | const char *str; | |
542 | ||
543 | dbg_printk("op load field string\n"); | |
544 | str = (const char *) stack_top->u.ptr.ptr; | |
545 | stack_top->u.s.str = str; | |
546 | if (unlikely(!stack_top->u.s.str)) { | |
547 | dbg_printk("Filter warning: loading a NULL string.\n"); | |
548 | ret = -EINVAL; | |
549 | goto end; | |
550 | } | |
4efe037b | 551 | stack_top->u.s.seq_len = LTTNG_SIZE_MAX; |
3834b99f MD |
552 | stack_top->u.s.literal_type = |
553 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
d644d1df | 554 | stack_top->type = REG_STRING; |
3834b99f MD |
555 | break; |
556 | } | |
557 | case OBJECT_TYPE_STRING_SEQUENCE: | |
558 | { | |
559 | const char *ptr; | |
560 | ||
561 | dbg_printk("op load field string sequence\n"); | |
562 | ptr = stack_top->u.ptr.ptr; | |
563 | stack_top->u.s.seq_len = *(unsigned long *) ptr; | |
564 | stack_top->u.s.str = *(const char **) (ptr + sizeof(unsigned long)); | |
565 | if (unlikely(!stack_top->u.s.str)) { | |
566 | dbg_printk("Filter warning: loading a NULL sequence.\n"); | |
567 | ret = -EINVAL; | |
568 | goto end; | |
569 | } | |
570 | stack_top->u.s.literal_type = | |
571 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
d644d1df | 572 | stack_top->type = REG_STRING; |
3834b99f MD |
573 | break; |
574 | } | |
575 | case OBJECT_TYPE_DYNAMIC: | |
576 | /* | |
577 | * Dynamic types in context are looked up | |
578 | * by context get index. | |
579 | */ | |
580 | ret = -EINVAL; | |
581 | goto end; | |
582 | case OBJECT_TYPE_DOUBLE: | |
583 | ret = -EINVAL; | |
584 | goto end; | |
585 | case OBJECT_TYPE_SEQUENCE: | |
586 | case OBJECT_TYPE_ARRAY: | |
587 | case OBJECT_TYPE_STRUCT: | |
588 | case OBJECT_TYPE_VARIANT: | |
5a15f70c | 589 | printk(KERN_WARNING "LTTng: filter: Sequences, arrays, struct and variant cannot be loaded (nested types).\n"); |
3834b99f MD |
590 | ret = -EINVAL; |
591 | goto end; | |
592 | } | |
593 | return 0; | |
594 | ||
595 | end: | |
596 | return ret; | |
597 | } | |
598 | ||
03cb0cdd FD |
599 | static |
600 | int lttng_bytecode_interpret_format_output(struct estack_entry *ax, | |
601 | struct lttng_interpreter_output *output) | |
602 | { | |
603 | int ret; | |
604 | ||
605 | again: | |
606 | switch (ax->type) { | |
607 | case REG_S64: | |
608 | output->type = LTTNG_INTERPRETER_TYPE_S64; | |
609 | output->u.s = ax->u.v; | |
610 | break; | |
611 | case REG_U64: | |
612 | output->type = LTTNG_INTERPRETER_TYPE_U64; | |
613 | output->u.u = (uint64_t) ax->u.v; | |
614 | break; | |
615 | case REG_STRING: | |
616 | output->type = LTTNG_INTERPRETER_TYPE_STRING; | |
617 | output->u.str.str = ax->u.s.str; | |
618 | output->u.str.len = ax->u.s.seq_len; | |
619 | break; | |
620 | case REG_PTR: | |
621 | switch (ax->u.ptr.object_type) { | |
622 | case OBJECT_TYPE_S8: | |
623 | case OBJECT_TYPE_S16: | |
624 | case OBJECT_TYPE_S32: | |
625 | case OBJECT_TYPE_S64: | |
626 | case OBJECT_TYPE_U8: | |
627 | case OBJECT_TYPE_U16: | |
628 | case OBJECT_TYPE_U32: | |
629 | case OBJECT_TYPE_U64: | |
630 | case OBJECT_TYPE_DOUBLE: | |
631 | case OBJECT_TYPE_STRING: | |
632 | case OBJECT_TYPE_STRING_SEQUENCE: | |
633 | ret = dynamic_load_field(ax); | |
634 | if (ret) | |
635 | return ret; | |
636 | /* Retry after loading ptr into stack top. */ | |
637 | goto again; | |
638 | case OBJECT_TYPE_SEQUENCE: | |
639 | output->type = LTTNG_INTERPRETER_TYPE_SEQUENCE; | |
640 | output->u.sequence.ptr = *(const char **) (ax->u.ptr.ptr + sizeof(unsigned long)); | |
641 | output->u.sequence.nr_elem = *(unsigned long *) ax->u.ptr.ptr; | |
642 | output->u.sequence.nested_type = ax->u.ptr.field->type.u.sequence_nestable.elem_type; | |
643 | break; | |
644 | case OBJECT_TYPE_ARRAY: | |
645 | /* Skip count (unsigned long) */ | |
646 | output->type = LTTNG_INTERPRETER_TYPE_SEQUENCE; | |
647 | output->u.sequence.ptr = *(const char **) (ax->u.ptr.ptr + sizeof(unsigned long)); | |
648 | output->u.sequence.nr_elem = ax->u.ptr.field->type.u.array_nestable.length; | |
649 | output->u.sequence.nested_type = ax->u.ptr.field->type.u.array_nestable.elem_type; | |
650 | break; | |
651 | case OBJECT_TYPE_STRUCT: | |
652 | case OBJECT_TYPE_VARIANT: | |
653 | default: | |
654 | return -EINVAL; | |
655 | } | |
656 | ||
657 | break; | |
658 | case REG_STAR_GLOB_STRING: | |
659 | case REG_TYPE_UNKNOWN: | |
660 | default: | |
661 | return -EINVAL; | |
662 | } | |
663 | ||
664 | return LTTNG_FILTER_RECORD_FLAG; | |
665 | } | |
666 | ||
07dfc1d0 MD |
667 | /* |
668 | * Return 0 (discard), or raise the 0x1 flag (log event). | |
669 | * Currently, other flags are kept for future extensions and have no | |
670 | * effect. | |
671 | */ | |
03cb0cdd FD |
672 | static |
673 | uint64_t bytecode_interpret(void *interpreter_data, | |
79150a49 | 674 | struct lttng_probe_ctx *lttng_probe_ctx, |
03cb0cdd FD |
675 | const char *interpreter_stack_data, |
676 | struct lttng_interpreter_output *output) | |
07dfc1d0 | 677 | { |
03cb0cdd | 678 | struct bytecode_runtime *bytecode = interpreter_data; |
07dfc1d0 MD |
679 | void *pc, *next_pc, *start_pc; |
680 | int ret = -EINVAL; | |
681 | uint64_t retval = 0; | |
682 | struct estack _stack; | |
683 | struct estack *stack = &_stack; | |
684 | register int64_t ax = 0, bx = 0; | |
d644d1df | 685 | register enum entry_type ax_t = REG_TYPE_UNKNOWN, bx_t = REG_TYPE_UNKNOWN; |
07dfc1d0 MD |
686 | register int top = FILTER_STACK_EMPTY; |
687 | #ifndef INTERPRETER_USE_SWITCH | |
688 | static void *dispatch[NR_FILTER_OPS] = { | |
689 | [ FILTER_OP_UNKNOWN ] = &&LABEL_FILTER_OP_UNKNOWN, | |
690 | ||
691 | [ FILTER_OP_RETURN ] = &&LABEL_FILTER_OP_RETURN, | |
692 | ||
693 | /* binary */ | |
694 | [ FILTER_OP_MUL ] = &&LABEL_FILTER_OP_MUL, | |
695 | [ FILTER_OP_DIV ] = &&LABEL_FILTER_OP_DIV, | |
696 | [ FILTER_OP_MOD ] = &&LABEL_FILTER_OP_MOD, | |
697 | [ FILTER_OP_PLUS ] = &&LABEL_FILTER_OP_PLUS, | |
698 | [ FILTER_OP_MINUS ] = &&LABEL_FILTER_OP_MINUS, | |
e16c054b MD |
699 | [ FILTER_OP_BIT_RSHIFT ] = &&LABEL_FILTER_OP_BIT_RSHIFT, |
700 | [ FILTER_OP_BIT_LSHIFT ] = &&LABEL_FILTER_OP_BIT_LSHIFT, | |
3834b99f MD |
701 | [ FILTER_OP_BIT_AND ] = &&LABEL_FILTER_OP_BIT_AND, |
702 | [ FILTER_OP_BIT_OR ] = &&LABEL_FILTER_OP_BIT_OR, | |
703 | [ FILTER_OP_BIT_XOR ] = &&LABEL_FILTER_OP_BIT_XOR, | |
07dfc1d0 MD |
704 | |
705 | /* binary comparators */ | |
706 | [ FILTER_OP_EQ ] = &&LABEL_FILTER_OP_EQ, | |
707 | [ FILTER_OP_NE ] = &&LABEL_FILTER_OP_NE, | |
708 | [ FILTER_OP_GT ] = &&LABEL_FILTER_OP_GT, | |
709 | [ FILTER_OP_LT ] = &&LABEL_FILTER_OP_LT, | |
710 | [ FILTER_OP_GE ] = &&LABEL_FILTER_OP_GE, | |
711 | [ FILTER_OP_LE ] = &&LABEL_FILTER_OP_LE, | |
712 | ||
713 | /* string binary comparator */ | |
714 | [ FILTER_OP_EQ_STRING ] = &&LABEL_FILTER_OP_EQ_STRING, | |
715 | [ FILTER_OP_NE_STRING ] = &&LABEL_FILTER_OP_NE_STRING, | |
716 | [ FILTER_OP_GT_STRING ] = &&LABEL_FILTER_OP_GT_STRING, | |
717 | [ FILTER_OP_LT_STRING ] = &&LABEL_FILTER_OP_LT_STRING, | |
718 | [ FILTER_OP_GE_STRING ] = &&LABEL_FILTER_OP_GE_STRING, | |
719 | [ FILTER_OP_LE_STRING ] = &&LABEL_FILTER_OP_LE_STRING, | |
720 | ||
02aca193 PP |
721 | /* globbing pattern binary comparator */ |
722 | [ FILTER_OP_EQ_STAR_GLOB_STRING ] = &&LABEL_FILTER_OP_EQ_STAR_GLOB_STRING, | |
723 | [ FILTER_OP_NE_STAR_GLOB_STRING ] = &&LABEL_FILTER_OP_NE_STAR_GLOB_STRING, | |
724 | ||
07dfc1d0 MD |
725 | /* s64 binary comparator */ |
726 | [ FILTER_OP_EQ_S64 ] = &&LABEL_FILTER_OP_EQ_S64, | |
727 | [ FILTER_OP_NE_S64 ] = &&LABEL_FILTER_OP_NE_S64, | |
728 | [ FILTER_OP_GT_S64 ] = &&LABEL_FILTER_OP_GT_S64, | |
729 | [ FILTER_OP_LT_S64 ] = &&LABEL_FILTER_OP_LT_S64, | |
730 | [ FILTER_OP_GE_S64 ] = &&LABEL_FILTER_OP_GE_S64, | |
731 | [ FILTER_OP_LE_S64 ] = &&LABEL_FILTER_OP_LE_S64, | |
732 | ||
733 | /* double binary comparator */ | |
734 | [ FILTER_OP_EQ_DOUBLE ] = &&LABEL_FILTER_OP_EQ_DOUBLE, | |
735 | [ FILTER_OP_NE_DOUBLE ] = &&LABEL_FILTER_OP_NE_DOUBLE, | |
736 | [ FILTER_OP_GT_DOUBLE ] = &&LABEL_FILTER_OP_GT_DOUBLE, | |
737 | [ FILTER_OP_LT_DOUBLE ] = &&LABEL_FILTER_OP_LT_DOUBLE, | |
738 | [ FILTER_OP_GE_DOUBLE ] = &&LABEL_FILTER_OP_GE_DOUBLE, | |
739 | [ FILTER_OP_LE_DOUBLE ] = &&LABEL_FILTER_OP_LE_DOUBLE, | |
740 | ||
741 | /* Mixed S64-double binary comparators */ | |
742 | [ FILTER_OP_EQ_DOUBLE_S64 ] = &&LABEL_FILTER_OP_EQ_DOUBLE_S64, | |
743 | [ FILTER_OP_NE_DOUBLE_S64 ] = &&LABEL_FILTER_OP_NE_DOUBLE_S64, | |
744 | [ FILTER_OP_GT_DOUBLE_S64 ] = &&LABEL_FILTER_OP_GT_DOUBLE_S64, | |
745 | [ FILTER_OP_LT_DOUBLE_S64 ] = &&LABEL_FILTER_OP_LT_DOUBLE_S64, | |
746 | [ FILTER_OP_GE_DOUBLE_S64 ] = &&LABEL_FILTER_OP_GE_DOUBLE_S64, | |
747 | [ FILTER_OP_LE_DOUBLE_S64 ] = &&LABEL_FILTER_OP_LE_DOUBLE_S64, | |
748 | ||
749 | [ FILTER_OP_EQ_S64_DOUBLE ] = &&LABEL_FILTER_OP_EQ_S64_DOUBLE, | |
750 | [ FILTER_OP_NE_S64_DOUBLE ] = &&LABEL_FILTER_OP_NE_S64_DOUBLE, | |
751 | [ FILTER_OP_GT_S64_DOUBLE ] = &&LABEL_FILTER_OP_GT_S64_DOUBLE, | |
752 | [ FILTER_OP_LT_S64_DOUBLE ] = &&LABEL_FILTER_OP_LT_S64_DOUBLE, | |
753 | [ FILTER_OP_GE_S64_DOUBLE ] = &&LABEL_FILTER_OP_GE_S64_DOUBLE, | |
754 | [ FILTER_OP_LE_S64_DOUBLE ] = &&LABEL_FILTER_OP_LE_S64_DOUBLE, | |
755 | ||
756 | /* unary */ | |
757 | [ FILTER_OP_UNARY_PLUS ] = &&LABEL_FILTER_OP_UNARY_PLUS, | |
758 | [ FILTER_OP_UNARY_MINUS ] = &&LABEL_FILTER_OP_UNARY_MINUS, | |
759 | [ FILTER_OP_UNARY_NOT ] = &&LABEL_FILTER_OP_UNARY_NOT, | |
760 | [ FILTER_OP_UNARY_PLUS_S64 ] = &&LABEL_FILTER_OP_UNARY_PLUS_S64, | |
761 | [ FILTER_OP_UNARY_MINUS_S64 ] = &&LABEL_FILTER_OP_UNARY_MINUS_S64, | |
762 | [ FILTER_OP_UNARY_NOT_S64 ] = &&LABEL_FILTER_OP_UNARY_NOT_S64, | |
763 | [ FILTER_OP_UNARY_PLUS_DOUBLE ] = &&LABEL_FILTER_OP_UNARY_PLUS_DOUBLE, | |
764 | [ FILTER_OP_UNARY_MINUS_DOUBLE ] = &&LABEL_FILTER_OP_UNARY_MINUS_DOUBLE, | |
765 | [ FILTER_OP_UNARY_NOT_DOUBLE ] = &&LABEL_FILTER_OP_UNARY_NOT_DOUBLE, | |
766 | ||
767 | /* logical */ | |
768 | [ FILTER_OP_AND ] = &&LABEL_FILTER_OP_AND, | |
769 | [ FILTER_OP_OR ] = &&LABEL_FILTER_OP_OR, | |
770 | ||
771 | /* load field ref */ | |
772 | [ FILTER_OP_LOAD_FIELD_REF ] = &&LABEL_FILTER_OP_LOAD_FIELD_REF, | |
773 | [ FILTER_OP_LOAD_FIELD_REF_STRING ] = &&LABEL_FILTER_OP_LOAD_FIELD_REF_STRING, | |
774 | [ FILTER_OP_LOAD_FIELD_REF_SEQUENCE ] = &&LABEL_FILTER_OP_LOAD_FIELD_REF_SEQUENCE, | |
775 | [ FILTER_OP_LOAD_FIELD_REF_S64 ] = &&LABEL_FILTER_OP_LOAD_FIELD_REF_S64, | |
776 | [ FILTER_OP_LOAD_FIELD_REF_DOUBLE ] = &&LABEL_FILTER_OP_LOAD_FIELD_REF_DOUBLE, | |
777 | ||
778 | /* load from immediate operand */ | |
779 | [ FILTER_OP_LOAD_STRING ] = &&LABEL_FILTER_OP_LOAD_STRING, | |
02aca193 | 780 | [ FILTER_OP_LOAD_STAR_GLOB_STRING ] = &&LABEL_FILTER_OP_LOAD_STAR_GLOB_STRING, |
07dfc1d0 MD |
781 | [ FILTER_OP_LOAD_S64 ] = &&LABEL_FILTER_OP_LOAD_S64, |
782 | [ FILTER_OP_LOAD_DOUBLE ] = &&LABEL_FILTER_OP_LOAD_DOUBLE, | |
783 | ||
784 | /* cast */ | |
785 | [ FILTER_OP_CAST_TO_S64 ] = &&LABEL_FILTER_OP_CAST_TO_S64, | |
786 | [ FILTER_OP_CAST_DOUBLE_TO_S64 ] = &&LABEL_FILTER_OP_CAST_DOUBLE_TO_S64, | |
787 | [ FILTER_OP_CAST_NOP ] = &&LABEL_FILTER_OP_CAST_NOP, | |
788 | ||
789 | /* get context ref */ | |
790 | [ FILTER_OP_GET_CONTEXT_REF ] = &&LABEL_FILTER_OP_GET_CONTEXT_REF, | |
791 | [ FILTER_OP_GET_CONTEXT_REF_STRING ] = &&LABEL_FILTER_OP_GET_CONTEXT_REF_STRING, | |
792 | [ FILTER_OP_GET_CONTEXT_REF_S64 ] = &&LABEL_FILTER_OP_GET_CONTEXT_REF_S64, | |
793 | [ FILTER_OP_GET_CONTEXT_REF_DOUBLE ] = &&LABEL_FILTER_OP_GET_CONTEXT_REF_DOUBLE, | |
f127e61e MD |
794 | |
795 | /* load userspace field ref */ | |
796 | [ FILTER_OP_LOAD_FIELD_REF_USER_STRING ] = &&LABEL_FILTER_OP_LOAD_FIELD_REF_USER_STRING, | |
797 | [ FILTER_OP_LOAD_FIELD_REF_USER_SEQUENCE ] = &&LABEL_FILTER_OP_LOAD_FIELD_REF_USER_SEQUENCE, | |
3834b99f MD |
798 | |
799 | /* Instructions for recursive traversal through composed types. */ | |
800 | [ FILTER_OP_GET_CONTEXT_ROOT ] = &&LABEL_FILTER_OP_GET_CONTEXT_ROOT, | |
801 | [ FILTER_OP_GET_APP_CONTEXT_ROOT ] = &&LABEL_FILTER_OP_GET_APP_CONTEXT_ROOT, | |
802 | [ FILTER_OP_GET_PAYLOAD_ROOT ] = &&LABEL_FILTER_OP_GET_PAYLOAD_ROOT, | |
803 | ||
804 | [ FILTER_OP_GET_SYMBOL ] = &&LABEL_FILTER_OP_GET_SYMBOL, | |
805 | [ FILTER_OP_GET_SYMBOL_FIELD ] = &&LABEL_FILTER_OP_GET_SYMBOL_FIELD, | |
806 | [ FILTER_OP_GET_INDEX_U16 ] = &&LABEL_FILTER_OP_GET_INDEX_U16, | |
807 | [ FILTER_OP_GET_INDEX_U64 ] = &&LABEL_FILTER_OP_GET_INDEX_U64, | |
808 | ||
809 | [ FILTER_OP_LOAD_FIELD ] = &&LABEL_FILTER_OP_LOAD_FIELD, | |
810 | [ FILTER_OP_LOAD_FIELD_S8 ] = &&LABEL_FILTER_OP_LOAD_FIELD_S8, | |
811 | [ FILTER_OP_LOAD_FIELD_S16 ] = &&LABEL_FILTER_OP_LOAD_FIELD_S16, | |
812 | [ FILTER_OP_LOAD_FIELD_S32 ] = &&LABEL_FILTER_OP_LOAD_FIELD_S32, | |
813 | [ FILTER_OP_LOAD_FIELD_S64 ] = &&LABEL_FILTER_OP_LOAD_FIELD_S64, | |
814 | [ FILTER_OP_LOAD_FIELD_U8 ] = &&LABEL_FILTER_OP_LOAD_FIELD_U8, | |
815 | [ FILTER_OP_LOAD_FIELD_U16 ] = &&LABEL_FILTER_OP_LOAD_FIELD_U16, | |
816 | [ FILTER_OP_LOAD_FIELD_U32 ] = &&LABEL_FILTER_OP_LOAD_FIELD_U32, | |
817 | [ FILTER_OP_LOAD_FIELD_U64 ] = &&LABEL_FILTER_OP_LOAD_FIELD_U64, | |
818 | [ FILTER_OP_LOAD_FIELD_STRING ] = &&LABEL_FILTER_OP_LOAD_FIELD_STRING, | |
819 | [ FILTER_OP_LOAD_FIELD_SEQUENCE ] = &&LABEL_FILTER_OP_LOAD_FIELD_SEQUENCE, | |
820 | [ FILTER_OP_LOAD_FIELD_DOUBLE ] = &&LABEL_FILTER_OP_LOAD_FIELD_DOUBLE, | |
e16c054b MD |
821 | |
822 | [ FILTER_OP_UNARY_BIT_NOT ] = &&LABEL_FILTER_OP_UNARY_BIT_NOT, | |
57ba4b41 MD |
823 | |
824 | [ FILTER_OP_RETURN_S64 ] = &&LABEL_FILTER_OP_RETURN_S64, | |
07dfc1d0 MD |
825 | }; |
826 | #endif /* #ifndef INTERPRETER_USE_SWITCH */ | |
827 | ||
828 | START_OP | |
829 | ||
830 | OP(FILTER_OP_UNKNOWN): | |
831 | OP(FILTER_OP_LOAD_FIELD_REF): | |
832 | OP(FILTER_OP_GET_CONTEXT_REF): | |
833 | #ifdef INTERPRETER_USE_SWITCH | |
834 | default: | |
835 | #endif /* INTERPRETER_USE_SWITCH */ | |
5a15f70c | 836 | printk(KERN_WARNING "LTTng: filter: unknown bytecode op %u\n", |
07dfc1d0 MD |
837 | (unsigned int) *(filter_opcode_t *) pc); |
838 | ret = -EINVAL; | |
839 | goto end; | |
840 | ||
841 | OP(FILTER_OP_RETURN): | |
57ba4b41 | 842 | OP(FILTER_OP_RETURN_S64): |
a93d4e71 | 843 | /* LTTNG_FILTER_DISCARD or LTTNG_FILTER_RECORD_FLAG */ |
d644d1df FD |
844 | switch (estack_ax_t) { |
845 | case REG_S64: | |
1242217a | 846 | case REG_U64: |
d644d1df FD |
847 | retval = !!estack_ax_v; |
848 | break; | |
849 | case REG_DOUBLE: | |
850 | case REG_STRING: | |
851 | case REG_PTR: | |
03cb0cdd FD |
852 | if (!output) { |
853 | ret = -EINVAL; | |
854 | goto end; | |
855 | } | |
856 | retval = 0; | |
857 | break; | |
d644d1df FD |
858 | case REG_STAR_GLOB_STRING: |
859 | case REG_TYPE_UNKNOWN: | |
860 | ret = -EINVAL; | |
861 | goto end; | |
862 | } | |
07dfc1d0 MD |
863 | ret = 0; |
864 | goto end; | |
865 | ||
866 | /* binary */ | |
867 | OP(FILTER_OP_MUL): | |
868 | OP(FILTER_OP_DIV): | |
869 | OP(FILTER_OP_MOD): | |
870 | OP(FILTER_OP_PLUS): | |
871 | OP(FILTER_OP_MINUS): | |
5a15f70c | 872 | printk(KERN_WARNING "LTTng: filter: unsupported bytecode op %u\n", |
07dfc1d0 MD |
873 | (unsigned int) *(filter_opcode_t *) pc); |
874 | ret = -EINVAL; | |
875 | goto end; | |
876 | ||
877 | OP(FILTER_OP_EQ): | |
878 | OP(FILTER_OP_NE): | |
879 | OP(FILTER_OP_GT): | |
880 | OP(FILTER_OP_LT): | |
881 | OP(FILTER_OP_GE): | |
882 | OP(FILTER_OP_LE): | |
5a15f70c | 883 | printk(KERN_WARNING "LTTng: filter: unsupported non-specialized bytecode op %u\n", |
07dfc1d0 MD |
884 | (unsigned int) *(filter_opcode_t *) pc); |
885 | ret = -EINVAL; | |
886 | goto end; | |
887 | ||
888 | OP(FILTER_OP_EQ_STRING): | |
889 | { | |
890 | int res; | |
891 | ||
892 | res = (stack_strcmp(stack, top, "==") == 0); | |
d644d1df | 893 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 894 | estack_ax_v = res; |
d644d1df | 895 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
896 | next_pc += sizeof(struct binary_op); |
897 | PO; | |
898 | } | |
899 | OP(FILTER_OP_NE_STRING): | |
900 | { | |
901 | int res; | |
902 | ||
903 | res = (stack_strcmp(stack, top, "!=") != 0); | |
d644d1df | 904 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 905 | estack_ax_v = res; |
d644d1df | 906 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
907 | next_pc += sizeof(struct binary_op); |
908 | PO; | |
909 | } | |
910 | OP(FILTER_OP_GT_STRING): | |
911 | { | |
912 | int res; | |
913 | ||
914 | res = (stack_strcmp(stack, top, ">") > 0); | |
d644d1df | 915 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 916 | estack_ax_v = res; |
d644d1df | 917 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
918 | next_pc += sizeof(struct binary_op); |
919 | PO; | |
920 | } | |
921 | OP(FILTER_OP_LT_STRING): | |
922 | { | |
923 | int res; | |
924 | ||
925 | res = (stack_strcmp(stack, top, "<") < 0); | |
d644d1df | 926 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 927 | estack_ax_v = res; |
d644d1df | 928 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
929 | next_pc += sizeof(struct binary_op); |
930 | PO; | |
931 | } | |
932 | OP(FILTER_OP_GE_STRING): | |
933 | { | |
934 | int res; | |
935 | ||
936 | res = (stack_strcmp(stack, top, ">=") >= 0); | |
d644d1df | 937 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 938 | estack_ax_v = res; |
d644d1df | 939 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
940 | next_pc += sizeof(struct binary_op); |
941 | PO; | |
942 | } | |
943 | OP(FILTER_OP_LE_STRING): | |
944 | { | |
945 | int res; | |
946 | ||
947 | res = (stack_strcmp(stack, top, "<=") <= 0); | |
d644d1df | 948 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 949 | estack_ax_v = res; |
d644d1df | 950 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
951 | next_pc += sizeof(struct binary_op); |
952 | PO; | |
953 | } | |
954 | ||
02aca193 PP |
955 | OP(FILTER_OP_EQ_STAR_GLOB_STRING): |
956 | { | |
957 | int res; | |
958 | ||
959 | res = (stack_star_glob_match(stack, top, "==") == 0); | |
d644d1df | 960 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
02aca193 | 961 | estack_ax_v = res; |
d644d1df | 962 | estack_ax_t = REG_S64; |
02aca193 PP |
963 | next_pc += sizeof(struct binary_op); |
964 | PO; | |
965 | } | |
966 | OP(FILTER_OP_NE_STAR_GLOB_STRING): | |
967 | { | |
968 | int res; | |
969 | ||
970 | res = (stack_star_glob_match(stack, top, "!=") != 0); | |
d644d1df | 971 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
02aca193 | 972 | estack_ax_v = res; |
d644d1df | 973 | estack_ax_t = REG_S64; |
02aca193 PP |
974 | next_pc += sizeof(struct binary_op); |
975 | PO; | |
976 | } | |
977 | ||
07dfc1d0 MD |
978 | OP(FILTER_OP_EQ_S64): |
979 | { | |
980 | int res; | |
981 | ||
982 | res = (estack_bx_v == estack_ax_v); | |
d644d1df | 983 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 984 | estack_ax_v = res; |
d644d1df | 985 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
986 | next_pc += sizeof(struct binary_op); |
987 | PO; | |
988 | } | |
989 | OP(FILTER_OP_NE_S64): | |
990 | { | |
991 | int res; | |
992 | ||
993 | res = (estack_bx_v != estack_ax_v); | |
d644d1df | 994 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 995 | estack_ax_v = res; |
d644d1df | 996 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
997 | next_pc += sizeof(struct binary_op); |
998 | PO; | |
999 | } | |
1000 | OP(FILTER_OP_GT_S64): | |
1001 | { | |
1002 | int res; | |
1003 | ||
1004 | res = (estack_bx_v > estack_ax_v); | |
d644d1df | 1005 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 1006 | estack_ax_v = res; |
d644d1df | 1007 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
1008 | next_pc += sizeof(struct binary_op); |
1009 | PO; | |
1010 | } | |
1011 | OP(FILTER_OP_LT_S64): | |
1012 | { | |
1013 | int res; | |
1014 | ||
1015 | res = (estack_bx_v < estack_ax_v); | |
d644d1df | 1016 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 1017 | estack_ax_v = res; |
d644d1df | 1018 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
1019 | next_pc += sizeof(struct binary_op); |
1020 | PO; | |
1021 | } | |
1022 | OP(FILTER_OP_GE_S64): | |
1023 | { | |
1024 | int res; | |
1025 | ||
1026 | res = (estack_bx_v >= estack_ax_v); | |
d644d1df | 1027 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 1028 | estack_ax_v = res; |
d644d1df | 1029 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
1030 | next_pc += sizeof(struct binary_op); |
1031 | PO; | |
1032 | } | |
1033 | OP(FILTER_OP_LE_S64): | |
1034 | { | |
1035 | int res; | |
1036 | ||
1037 | res = (estack_bx_v <= estack_ax_v); | |
d644d1df | 1038 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 1039 | estack_ax_v = res; |
d644d1df | 1040 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
1041 | next_pc += sizeof(struct binary_op); |
1042 | PO; | |
1043 | } | |
1044 | ||
1045 | OP(FILTER_OP_EQ_DOUBLE): | |
1046 | OP(FILTER_OP_NE_DOUBLE): | |
1047 | OP(FILTER_OP_GT_DOUBLE): | |
1048 | OP(FILTER_OP_LT_DOUBLE): | |
1049 | OP(FILTER_OP_GE_DOUBLE): | |
1050 | OP(FILTER_OP_LE_DOUBLE): | |
1051 | { | |
1052 | BUG_ON(1); | |
1053 | PO; | |
1054 | } | |
1055 | ||
1056 | /* Mixed S64-double binary comparators */ | |
1057 | OP(FILTER_OP_EQ_DOUBLE_S64): | |
1058 | OP(FILTER_OP_NE_DOUBLE_S64): | |
1059 | OP(FILTER_OP_GT_DOUBLE_S64): | |
1060 | OP(FILTER_OP_LT_DOUBLE_S64): | |
1061 | OP(FILTER_OP_GE_DOUBLE_S64): | |
1062 | OP(FILTER_OP_LE_DOUBLE_S64): | |
1063 | OP(FILTER_OP_EQ_S64_DOUBLE): | |
1064 | OP(FILTER_OP_NE_S64_DOUBLE): | |
1065 | OP(FILTER_OP_GT_S64_DOUBLE): | |
1066 | OP(FILTER_OP_LT_S64_DOUBLE): | |
1067 | OP(FILTER_OP_GE_S64_DOUBLE): | |
1068 | OP(FILTER_OP_LE_S64_DOUBLE): | |
1069 | { | |
1070 | BUG_ON(1); | |
1071 | PO; | |
1072 | } | |
e16c054b MD |
1073 | OP(FILTER_OP_BIT_RSHIFT): |
1074 | { | |
1075 | int64_t res; | |
1076 | ||
d644d1df FD |
1077 | if (!IS_INTEGER_REGISTER(estack_ax_t) || !IS_INTEGER_REGISTER(estack_bx_t)) { |
1078 | ret = -EINVAL; | |
1079 | goto end; | |
1080 | } | |
1081 | ||
ea13ec96 MD |
1082 | /* Catch undefined behavior. */ |
1083 | if (unlikely(estack_ax_v < 0 || estack_ax_v >= 64)) { | |
1084 | ret = -EINVAL; | |
1085 | goto end; | |
1086 | } | |
f8d42740 | 1087 | res = ((uint64_t) estack_bx_v >> (uint32_t) estack_ax_v); |
d644d1df | 1088 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
e16c054b | 1089 | estack_ax_v = res; |
1242217a | 1090 | estack_ax_t = REG_U64; |
e16c054b MD |
1091 | next_pc += sizeof(struct binary_op); |
1092 | PO; | |
1093 | } | |
1094 | OP(FILTER_OP_BIT_LSHIFT): | |
1095 | { | |
1096 | int64_t res; | |
1097 | ||
d644d1df FD |
1098 | if (!IS_INTEGER_REGISTER(estack_ax_t) || !IS_INTEGER_REGISTER(estack_bx_t)) { |
1099 | ret = -EINVAL; | |
1100 | goto end; | |
1101 | } | |
1102 | ||
ea13ec96 MD |
1103 | /* Catch undefined behavior. */ |
1104 | if (unlikely(estack_ax_v < 0 || estack_ax_v >= 64)) { | |
1105 | ret = -EINVAL; | |
1106 | goto end; | |
1107 | } | |
f8d42740 | 1108 | res = ((uint64_t) estack_bx_v << (uint32_t) estack_ax_v); |
d644d1df | 1109 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
e16c054b | 1110 | estack_ax_v = res; |
1242217a | 1111 | estack_ax_t = REG_U64; |
e16c054b MD |
1112 | next_pc += sizeof(struct binary_op); |
1113 | PO; | |
1114 | } | |
3834b99f MD |
1115 | OP(FILTER_OP_BIT_AND): |
1116 | { | |
1117 | int64_t res; | |
1118 | ||
d644d1df FD |
1119 | if (!IS_INTEGER_REGISTER(estack_ax_t) || !IS_INTEGER_REGISTER(estack_bx_t)) { |
1120 | ret = -EINVAL; | |
1121 | goto end; | |
1122 | } | |
1123 | ||
f8d42740 | 1124 | res = ((uint64_t) estack_bx_v & (uint64_t) estack_ax_v); |
d644d1df | 1125 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
3834b99f | 1126 | estack_ax_v = res; |
1242217a | 1127 | estack_ax_t = REG_U64; |
3834b99f MD |
1128 | next_pc += sizeof(struct binary_op); |
1129 | PO; | |
1130 | } | |
1131 | OP(FILTER_OP_BIT_OR): | |
1132 | { | |
1133 | int64_t res; | |
1134 | ||
d644d1df FD |
1135 | if (!IS_INTEGER_REGISTER(estack_ax_t) || !IS_INTEGER_REGISTER(estack_bx_t)) { |
1136 | ret = -EINVAL; | |
1137 | goto end; | |
1138 | } | |
1139 | ||
f8d42740 | 1140 | res = ((uint64_t) estack_bx_v | (uint64_t) estack_ax_v); |
d644d1df | 1141 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
3834b99f | 1142 | estack_ax_v = res; |
1242217a | 1143 | estack_ax_t = REG_U64; |
3834b99f MD |
1144 | next_pc += sizeof(struct binary_op); |
1145 | PO; | |
1146 | } | |
1147 | OP(FILTER_OP_BIT_XOR): | |
1148 | { | |
1149 | int64_t res; | |
1150 | ||
d644d1df FD |
1151 | if (!IS_INTEGER_REGISTER(estack_ax_t) || !IS_INTEGER_REGISTER(estack_bx_t)) { |
1152 | ret = -EINVAL; | |
1153 | goto end; | |
1154 | } | |
1155 | ||
f8d42740 | 1156 | res = ((uint64_t) estack_bx_v ^ (uint64_t) estack_ax_v); |
d644d1df | 1157 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
3834b99f | 1158 | estack_ax_v = res; |
1242217a | 1159 | estack_ax_t = REG_U64; |
3834b99f MD |
1160 | next_pc += sizeof(struct binary_op); |
1161 | PO; | |
1162 | } | |
07dfc1d0 MD |
1163 | |
1164 | /* unary */ | |
1165 | OP(FILTER_OP_UNARY_PLUS): | |
1166 | OP(FILTER_OP_UNARY_MINUS): | |
1167 | OP(FILTER_OP_UNARY_NOT): | |
5a15f70c | 1168 | printk(KERN_WARNING "LTTng: filter: unsupported non-specialized bytecode op %u\n", |
07dfc1d0 MD |
1169 | (unsigned int) *(filter_opcode_t *) pc); |
1170 | ret = -EINVAL; | |
1171 | goto end; | |
1172 | ||
1173 | ||
e16c054b MD |
1174 | OP(FILTER_OP_UNARY_BIT_NOT): |
1175 | { | |
f8d42740 | 1176 | estack_ax_v = ~(uint64_t) estack_ax_v; |
d644d1df | 1177 | estack_ax_t = REG_S64; |
e16c054b MD |
1178 | next_pc += sizeof(struct unary_op); |
1179 | PO; | |
1180 | } | |
1181 | ||
07dfc1d0 MD |
1182 | OP(FILTER_OP_UNARY_PLUS_S64): |
1183 | { | |
1184 | next_pc += sizeof(struct unary_op); | |
1185 | PO; | |
1186 | } | |
1187 | OP(FILTER_OP_UNARY_MINUS_S64): | |
1188 | { | |
1189 | estack_ax_v = -estack_ax_v; | |
d644d1df | 1190 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
1191 | next_pc += sizeof(struct unary_op); |
1192 | PO; | |
1193 | } | |
1194 | OP(FILTER_OP_UNARY_PLUS_DOUBLE): | |
1195 | OP(FILTER_OP_UNARY_MINUS_DOUBLE): | |
1196 | { | |
1197 | BUG_ON(1); | |
1198 | PO; | |
1199 | } | |
1200 | OP(FILTER_OP_UNARY_NOT_S64): | |
1201 | { | |
1202 | estack_ax_v = !estack_ax_v; | |
d644d1df | 1203 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
1204 | next_pc += sizeof(struct unary_op); |
1205 | PO; | |
1206 | } | |
1207 | OP(FILTER_OP_UNARY_NOT_DOUBLE): | |
1208 | { | |
1209 | BUG_ON(1); | |
1210 | PO; | |
1211 | } | |
1212 | ||
1213 | /* logical */ | |
1214 | OP(FILTER_OP_AND): | |
1215 | { | |
1216 | struct logical_op *insn = (struct logical_op *) pc; | |
1217 | ||
1218 | /* If AX is 0, skip and evaluate to 0 */ | |
1219 | if (unlikely(estack_ax_v == 0)) { | |
1220 | dbg_printk("Jumping to bytecode offset %u\n", | |
1221 | (unsigned int) insn->skip_offset); | |
1222 | next_pc = start_pc + insn->skip_offset; | |
1223 | } else { | |
1224 | /* Pop 1 when jump not taken */ | |
d644d1df | 1225 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 MD |
1226 | next_pc += sizeof(struct logical_op); |
1227 | } | |
1228 | PO; | |
1229 | } | |
1230 | OP(FILTER_OP_OR): | |
1231 | { | |
1232 | struct logical_op *insn = (struct logical_op *) pc; | |
1233 | ||
1234 | /* If AX is nonzero, skip and evaluate to 1 */ | |
1235 | ||
1236 | if (unlikely(estack_ax_v != 0)) { | |
1237 | estack_ax_v = 1; | |
1238 | dbg_printk("Jumping to bytecode offset %u\n", | |
1239 | (unsigned int) insn->skip_offset); | |
1240 | next_pc = start_pc + insn->skip_offset; | |
1241 | } else { | |
1242 | /* Pop 1 when jump not taken */ | |
d644d1df | 1243 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 MD |
1244 | next_pc += sizeof(struct logical_op); |
1245 | } | |
1246 | PO; | |
1247 | } | |
1248 | ||
1249 | ||
1250 | /* load field ref */ | |
1251 | OP(FILTER_OP_LOAD_FIELD_REF_STRING): | |
1252 | { | |
1253 | struct load_op *insn = (struct load_op *) pc; | |
1254 | struct field_ref *ref = (struct field_ref *) insn->data; | |
1255 | ||
1256 | dbg_printk("load field ref offset %u type string\n", | |
1257 | ref->offset); | |
d644d1df | 1258 | estack_push(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 1259 | estack_ax(stack, top)->u.s.str = |
03cb0cdd | 1260 | *(const char * const *) &interpreter_stack_data[ref->offset]; |
07dfc1d0 MD |
1261 | if (unlikely(!estack_ax(stack, top)->u.s.str)) { |
1262 | dbg_printk("Filter warning: loading a NULL string.\n"); | |
1263 | ret = -EINVAL; | |
1264 | goto end; | |
1265 | } | |
cbc19040 | 1266 | estack_ax(stack, top)->u.s.seq_len = LTTNG_SIZE_MAX; |
02aca193 PP |
1267 | estack_ax(stack, top)->u.s.literal_type = |
1268 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
f127e61e | 1269 | estack_ax(stack, top)->u.s.user = 0; |
d644d1df | 1270 | estack_ax(stack, top)->type = REG_STRING; |
07dfc1d0 MD |
1271 | dbg_printk("ref load string %s\n", estack_ax(stack, top)->u.s.str); |
1272 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
1273 | PO; | |
1274 | } | |
1275 | ||
1276 | OP(FILTER_OP_LOAD_FIELD_REF_SEQUENCE): | |
1277 | { | |
1278 | struct load_op *insn = (struct load_op *) pc; | |
1279 | struct field_ref *ref = (struct field_ref *) insn->data; | |
1280 | ||
1281 | dbg_printk("load field ref offset %u type sequence\n", | |
1282 | ref->offset); | |
d644d1df | 1283 | estack_push(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 1284 | estack_ax(stack, top)->u.s.seq_len = |
03cb0cdd | 1285 | *(unsigned long *) &interpreter_stack_data[ref->offset]; |
07dfc1d0 | 1286 | estack_ax(stack, top)->u.s.str = |
03cb0cdd | 1287 | *(const char **) (&interpreter_stack_data[ref->offset |
07dfc1d0 MD |
1288 | + sizeof(unsigned long)]); |
1289 | if (unlikely(!estack_ax(stack, top)->u.s.str)) { | |
1290 | dbg_printk("Filter warning: loading a NULL sequence.\n"); | |
1291 | ret = -EINVAL; | |
1292 | goto end; | |
1293 | } | |
02aca193 PP |
1294 | estack_ax(stack, top)->u.s.literal_type = |
1295 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
f127e61e | 1296 | estack_ax(stack, top)->u.s.user = 0; |
07dfc1d0 MD |
1297 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); |
1298 | PO; | |
1299 | } | |
1300 | ||
1301 | OP(FILTER_OP_LOAD_FIELD_REF_S64): | |
1302 | { | |
1303 | struct load_op *insn = (struct load_op *) pc; | |
1304 | struct field_ref *ref = (struct field_ref *) insn->data; | |
1305 | ||
1306 | dbg_printk("load field ref offset %u type s64\n", | |
1307 | ref->offset); | |
d644d1df | 1308 | estack_push(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 1309 | estack_ax_v = |
03cb0cdd | 1310 | ((struct literal_numeric *) &interpreter_stack_data[ref->offset])->v; |
d644d1df | 1311 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
1312 | dbg_printk("ref load s64 %lld\n", |
1313 | (long long) estack_ax_v); | |
1314 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
1315 | PO; | |
1316 | } | |
1317 | ||
1318 | OP(FILTER_OP_LOAD_FIELD_REF_DOUBLE): | |
1319 | { | |
1320 | BUG_ON(1); | |
1321 | PO; | |
1322 | } | |
1323 | ||
1324 | /* load from immediate operand */ | |
1325 | OP(FILTER_OP_LOAD_STRING): | |
1326 | { | |
1327 | struct load_op *insn = (struct load_op *) pc; | |
1328 | ||
1329 | dbg_printk("load string %s\n", insn->data); | |
d644d1df | 1330 | estack_push(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 1331 | estack_ax(stack, top)->u.s.str = insn->data; |
cbc19040 | 1332 | estack_ax(stack, top)->u.s.seq_len = LTTNG_SIZE_MAX; |
02aca193 PP |
1333 | estack_ax(stack, top)->u.s.literal_type = |
1334 | ESTACK_STRING_LITERAL_TYPE_PLAIN; | |
1335 | estack_ax(stack, top)->u.s.user = 0; | |
1336 | next_pc += sizeof(struct load_op) + strlen(insn->data) + 1; | |
1337 | PO; | |
1338 | } | |
1339 | ||
1340 | OP(FILTER_OP_LOAD_STAR_GLOB_STRING): | |
1341 | { | |
1342 | struct load_op *insn = (struct load_op *) pc; | |
1343 | ||
1344 | dbg_printk("load globbing pattern %s\n", insn->data); | |
d644d1df | 1345 | estack_push(stack, top, ax, bx, ax_t, bx_t); |
02aca193 | 1346 | estack_ax(stack, top)->u.s.str = insn->data; |
cbc19040 | 1347 | estack_ax(stack, top)->u.s.seq_len = LTTNG_SIZE_MAX; |
02aca193 PP |
1348 | estack_ax(stack, top)->u.s.literal_type = |
1349 | ESTACK_STRING_LITERAL_TYPE_STAR_GLOB; | |
f127e61e | 1350 | estack_ax(stack, top)->u.s.user = 0; |
07dfc1d0 MD |
1351 | next_pc += sizeof(struct load_op) + strlen(insn->data) + 1; |
1352 | PO; | |
1353 | } | |
1354 | ||
1355 | OP(FILTER_OP_LOAD_S64): | |
1356 | { | |
1357 | struct load_op *insn = (struct load_op *) pc; | |
1358 | ||
d644d1df | 1359 | estack_push(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 1360 | estack_ax_v = ((struct literal_numeric *) insn->data)->v; |
d644d1df | 1361 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
1362 | dbg_printk("load s64 %lld\n", |
1363 | (long long) estack_ax_v); | |
1364 | next_pc += sizeof(struct load_op) | |
1365 | + sizeof(struct literal_numeric); | |
1366 | PO; | |
1367 | } | |
1368 | ||
1369 | OP(FILTER_OP_LOAD_DOUBLE): | |
1370 | { | |
1371 | BUG_ON(1); | |
1372 | PO; | |
1373 | } | |
1374 | ||
1375 | /* cast */ | |
1376 | OP(FILTER_OP_CAST_TO_S64): | |
5a15f70c | 1377 | printk(KERN_WARNING "LTTng: filter: unsupported non-specialized bytecode op %u\n", |
07dfc1d0 MD |
1378 | (unsigned int) *(filter_opcode_t *) pc); |
1379 | ret = -EINVAL; | |
1380 | goto end; | |
1381 | ||
1382 | OP(FILTER_OP_CAST_DOUBLE_TO_S64): | |
1383 | { | |
1384 | BUG_ON(1); | |
1385 | PO; | |
1386 | } | |
1387 | ||
1388 | OP(FILTER_OP_CAST_NOP): | |
1389 | { | |
1390 | next_pc += sizeof(struct cast_op); | |
1391 | PO; | |
1392 | } | |
1393 | ||
1394 | /* get context ref */ | |
1395 | OP(FILTER_OP_GET_CONTEXT_REF_STRING): | |
1396 | { | |
1397 | struct load_op *insn = (struct load_op *) pc; | |
1398 | struct field_ref *ref = (struct field_ref *) insn->data; | |
1399 | struct lttng_ctx_field *ctx_field; | |
1400 | union lttng_ctx_value v; | |
1401 | ||
1402 | dbg_printk("get context ref offset %u type string\n", | |
1403 | ref->offset); | |
1404 | ctx_field = <tng_static_ctx->fields[ref->offset]; | |
79150a49 | 1405 | ctx_field->get_value(ctx_field, lttng_probe_ctx, &v); |
d644d1df | 1406 | estack_push(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 MD |
1407 | estack_ax(stack, top)->u.s.str = v.str; |
1408 | if (unlikely(!estack_ax(stack, top)->u.s.str)) { | |
1409 | dbg_printk("Filter warning: loading a NULL string.\n"); | |
1410 | ret = -EINVAL; | |
1411 | goto end; | |
1412 | } | |
cbc19040 | 1413 | estack_ax(stack, top)->u.s.seq_len = LTTNG_SIZE_MAX; |
02aca193 PP |
1414 | estack_ax(stack, top)->u.s.literal_type = |
1415 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
f127e61e | 1416 | estack_ax(stack, top)->u.s.user = 0; |
d644d1df | 1417 | estack_ax(stack, top)->type = REG_STRING; |
07dfc1d0 MD |
1418 | dbg_printk("ref get context string %s\n", estack_ax(stack, top)->u.s.str); |
1419 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
1420 | PO; | |
1421 | } | |
1422 | ||
1423 | OP(FILTER_OP_GET_CONTEXT_REF_S64): | |
1424 | { | |
1425 | struct load_op *insn = (struct load_op *) pc; | |
1426 | struct field_ref *ref = (struct field_ref *) insn->data; | |
1427 | struct lttng_ctx_field *ctx_field; | |
1428 | union lttng_ctx_value v; | |
1429 | ||
1430 | dbg_printk("get context ref offset %u type s64\n", | |
1431 | ref->offset); | |
1432 | ctx_field = <tng_static_ctx->fields[ref->offset]; | |
79150a49 | 1433 | ctx_field->get_value(ctx_field, lttng_probe_ctx, &v); |
d644d1df | 1434 | estack_push(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 1435 | estack_ax_v = v.s64; |
d644d1df | 1436 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
1437 | dbg_printk("ref get context s64 %lld\n", |
1438 | (long long) estack_ax_v); | |
1439 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
1440 | PO; | |
1441 | } | |
1442 | ||
1443 | OP(FILTER_OP_GET_CONTEXT_REF_DOUBLE): | |
1444 | { | |
1445 | BUG_ON(1); | |
1446 | PO; | |
1447 | } | |
1448 | ||
f127e61e MD |
1449 | /* load userspace field ref */ |
1450 | OP(FILTER_OP_LOAD_FIELD_REF_USER_STRING): | |
1451 | { | |
1452 | struct load_op *insn = (struct load_op *) pc; | |
1453 | struct field_ref *ref = (struct field_ref *) insn->data; | |
1454 | ||
1455 | dbg_printk("load field ref offset %u type user string\n", | |
1456 | ref->offset); | |
d644d1df | 1457 | estack_push(stack, top, ax, bx, ax_t, bx_t); |
5b4ad89f | 1458 | estack_ax(stack, top)->u.s.user_str = |
03cb0cdd | 1459 | *(const char * const *) &interpreter_stack_data[ref->offset]; |
f127e61e MD |
1460 | if (unlikely(!estack_ax(stack, top)->u.s.str)) { |
1461 | dbg_printk("Filter warning: loading a NULL string.\n"); | |
1462 | ret = -EINVAL; | |
1463 | goto end; | |
1464 | } | |
cbc19040 | 1465 | estack_ax(stack, top)->u.s.seq_len = LTTNG_SIZE_MAX; |
02aca193 PP |
1466 | estack_ax(stack, top)->u.s.literal_type = |
1467 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
f127e61e | 1468 | estack_ax(stack, top)->u.s.user = 1; |
d644d1df | 1469 | estack_ax(stack, top)->type = REG_STRING; |
f127e61e MD |
1470 | dbg_printk("ref load string %s\n", estack_ax(stack, top)->u.s.str); |
1471 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
1472 | PO; | |
1473 | } | |
1474 | ||
1475 | OP(FILTER_OP_LOAD_FIELD_REF_USER_SEQUENCE): | |
1476 | { | |
1477 | struct load_op *insn = (struct load_op *) pc; | |
1478 | struct field_ref *ref = (struct field_ref *) insn->data; | |
1479 | ||
1480 | dbg_printk("load field ref offset %u type user sequence\n", | |
1481 | ref->offset); | |
d644d1df | 1482 | estack_push(stack, top, ax, bx, ax_t, bx_t); |
f127e61e | 1483 | estack_ax(stack, top)->u.s.seq_len = |
03cb0cdd | 1484 | *(unsigned long *) &interpreter_stack_data[ref->offset]; |
5b4ad89f | 1485 | estack_ax(stack, top)->u.s.user_str = |
03cb0cdd | 1486 | *(const char **) (&interpreter_stack_data[ref->offset |
f127e61e MD |
1487 | + sizeof(unsigned long)]); |
1488 | if (unlikely(!estack_ax(stack, top)->u.s.str)) { | |
1489 | dbg_printk("Filter warning: loading a NULL sequence.\n"); | |
1490 | ret = -EINVAL; | |
1491 | goto end; | |
1492 | } | |
02aca193 PP |
1493 | estack_ax(stack, top)->u.s.literal_type = |
1494 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
f127e61e MD |
1495 | estack_ax(stack, top)->u.s.user = 1; |
1496 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
1497 | PO; | |
1498 | } | |
1499 | ||
3834b99f MD |
1500 | OP(FILTER_OP_GET_CONTEXT_ROOT): |
1501 | { | |
1502 | dbg_printk("op get context root\n"); | |
d644d1df | 1503 | estack_push(stack, top, ax, bx, ax_t, bx_t); |
3834b99f MD |
1504 | estack_ax(stack, top)->u.ptr.type = LOAD_ROOT_CONTEXT; |
1505 | /* "field" only needed for variants. */ | |
1506 | estack_ax(stack, top)->u.ptr.field = NULL; | |
d644d1df | 1507 | estack_ax(stack, top)->type = REG_PTR; |
3834b99f MD |
1508 | next_pc += sizeof(struct load_op); |
1509 | PO; | |
1510 | } | |
1511 | ||
1512 | OP(FILTER_OP_GET_APP_CONTEXT_ROOT): | |
1513 | { | |
1514 | BUG_ON(1); | |
1515 | PO; | |
1516 | } | |
1517 | ||
1518 | OP(FILTER_OP_GET_PAYLOAD_ROOT): | |
1519 | { | |
1520 | dbg_printk("op get app payload root\n"); | |
d644d1df | 1521 | estack_push(stack, top, ax, bx, ax_t, bx_t); |
3834b99f | 1522 | estack_ax(stack, top)->u.ptr.type = LOAD_ROOT_PAYLOAD; |
03cb0cdd | 1523 | estack_ax(stack, top)->u.ptr.ptr = interpreter_stack_data; |
3834b99f MD |
1524 | /* "field" only needed for variants. */ |
1525 | estack_ax(stack, top)->u.ptr.field = NULL; | |
d644d1df | 1526 | estack_ax(stack, top)->type = REG_PTR; |
3834b99f MD |
1527 | next_pc += sizeof(struct load_op); |
1528 | PO; | |
1529 | } | |
1530 | ||
1531 | OP(FILTER_OP_GET_SYMBOL): | |
1532 | { | |
1533 | dbg_printk("op get symbol\n"); | |
1534 | switch (estack_ax(stack, top)->u.ptr.type) { | |
1535 | case LOAD_OBJECT: | |
5a15f70c | 1536 | printk(KERN_WARNING "LTTng: filter: Nested fields not implemented yet.\n"); |
3834b99f MD |
1537 | ret = -EINVAL; |
1538 | goto end; | |
1539 | case LOAD_ROOT_CONTEXT: | |
1540 | case LOAD_ROOT_APP_CONTEXT: | |
1541 | case LOAD_ROOT_PAYLOAD: | |
1542 | /* | |
1543 | * symbol lookup is performed by | |
1544 | * specialization. | |
1545 | */ | |
1546 | ret = -EINVAL; | |
1547 | goto end; | |
1548 | } | |
1549 | next_pc += sizeof(struct load_op) + sizeof(struct get_symbol); | |
1550 | PO; | |
1551 | } | |
1552 | ||
1553 | OP(FILTER_OP_GET_SYMBOL_FIELD): | |
1554 | { | |
1555 | /* | |
1556 | * Used for first variant encountered in a | |
1557 | * traversal. Variants are not implemented yet. | |
1558 | */ | |
1559 | ret = -EINVAL; | |
1560 | goto end; | |
1561 | } | |
1562 | ||
1563 | OP(FILTER_OP_GET_INDEX_U16): | |
1564 | { | |
1565 | struct load_op *insn = (struct load_op *) pc; | |
1566 | struct get_index_u16 *index = (struct get_index_u16 *) insn->data; | |
1567 | ||
1568 | dbg_printk("op get index u16\n"); | |
1569 | ret = dynamic_get_index(lttng_probe_ctx, bytecode, index->index, estack_ax(stack, top)); | |
1570 | if (ret) | |
1571 | goto end; | |
1572 | estack_ax_v = estack_ax(stack, top)->u.v; | |
d644d1df | 1573 | estack_ax_t = estack_ax(stack, top)->type; |
3834b99f MD |
1574 | next_pc += sizeof(struct load_op) + sizeof(struct get_index_u16); |
1575 | PO; | |
1576 | } | |
1577 | ||
1578 | OP(FILTER_OP_GET_INDEX_U64): | |
1579 | { | |
1580 | struct load_op *insn = (struct load_op *) pc; | |
1581 | struct get_index_u64 *index = (struct get_index_u64 *) insn->data; | |
1582 | ||
1583 | dbg_printk("op get index u64\n"); | |
1584 | ret = dynamic_get_index(lttng_probe_ctx, bytecode, index->index, estack_ax(stack, top)); | |
1585 | if (ret) | |
1586 | goto end; | |
1587 | estack_ax_v = estack_ax(stack, top)->u.v; | |
d644d1df | 1588 | estack_ax_t = estack_ax(stack, top)->type; |
3834b99f MD |
1589 | next_pc += sizeof(struct load_op) + sizeof(struct get_index_u64); |
1590 | PO; | |
1591 | } | |
1592 | ||
1593 | OP(FILTER_OP_LOAD_FIELD): | |
1594 | { | |
1595 | dbg_printk("op load field\n"); | |
1596 | ret = dynamic_load_field(estack_ax(stack, top)); | |
1597 | if (ret) | |
1598 | goto end; | |
1599 | estack_ax_v = estack_ax(stack, top)->u.v; | |
d644d1df | 1600 | estack_ax_t = estack_ax(stack, top)->type; |
3834b99f MD |
1601 | next_pc += sizeof(struct load_op); |
1602 | PO; | |
1603 | } | |
1604 | ||
1605 | OP(FILTER_OP_LOAD_FIELD_S8): | |
1606 | { | |
1607 | dbg_printk("op load field s8\n"); | |
1608 | ||
1609 | estack_ax_v = *(int8_t *) estack_ax(stack, top)->u.ptr.ptr; | |
d644d1df | 1610 | estack_ax_t = REG_S64; |
3834b99f MD |
1611 | next_pc += sizeof(struct load_op); |
1612 | PO; | |
1613 | } | |
1614 | OP(FILTER_OP_LOAD_FIELD_S16): | |
1615 | { | |
1616 | dbg_printk("op load field s16\n"); | |
1617 | ||
1618 | estack_ax_v = *(int16_t *) estack_ax(stack, top)->u.ptr.ptr; | |
d644d1df | 1619 | estack_ax_t = REG_S64; |
3834b99f MD |
1620 | next_pc += sizeof(struct load_op); |
1621 | PO; | |
1622 | } | |
1623 | OP(FILTER_OP_LOAD_FIELD_S32): | |
1624 | { | |
1625 | dbg_printk("op load field s32\n"); | |
1626 | ||
1627 | estack_ax_v = *(int32_t *) estack_ax(stack, top)->u.ptr.ptr; | |
d644d1df | 1628 | estack_ax_t = REG_S64; |
3834b99f MD |
1629 | next_pc += sizeof(struct load_op); |
1630 | PO; | |
1631 | } | |
1632 | OP(FILTER_OP_LOAD_FIELD_S64): | |
1633 | { | |
1634 | dbg_printk("op load field s64\n"); | |
1635 | ||
1636 | estack_ax_v = *(int64_t *) estack_ax(stack, top)->u.ptr.ptr; | |
d644d1df | 1637 | estack_ax_t = REG_S64; |
3834b99f MD |
1638 | next_pc += sizeof(struct load_op); |
1639 | PO; | |
1640 | } | |
1641 | OP(FILTER_OP_LOAD_FIELD_U8): | |
1642 | { | |
1643 | dbg_printk("op load field u8\n"); | |
1644 | ||
1645 | estack_ax_v = *(uint8_t *) estack_ax(stack, top)->u.ptr.ptr; | |
d644d1df | 1646 | estack_ax_t = REG_S64; |
3834b99f MD |
1647 | next_pc += sizeof(struct load_op); |
1648 | PO; | |
1649 | } | |
1650 | OP(FILTER_OP_LOAD_FIELD_U16): | |
1651 | { | |
1652 | dbg_printk("op load field u16\n"); | |
1653 | ||
1654 | estack_ax_v = *(uint16_t *) estack_ax(stack, top)->u.ptr.ptr; | |
d644d1df | 1655 | estack_ax_t = REG_S64; |
3834b99f MD |
1656 | next_pc += sizeof(struct load_op); |
1657 | PO; | |
1658 | } | |
1659 | OP(FILTER_OP_LOAD_FIELD_U32): | |
1660 | { | |
1661 | dbg_printk("op load field u32\n"); | |
1662 | ||
1663 | estack_ax_v = *(uint32_t *) estack_ax(stack, top)->u.ptr.ptr; | |
d644d1df | 1664 | estack_ax_t = REG_S64; |
3834b99f MD |
1665 | next_pc += sizeof(struct load_op); |
1666 | PO; | |
1667 | } | |
1668 | OP(FILTER_OP_LOAD_FIELD_U64): | |
1669 | { | |
1670 | dbg_printk("op load field u64\n"); | |
1671 | ||
1672 | estack_ax_v = *(uint64_t *) estack_ax(stack, top)->u.ptr.ptr; | |
d644d1df | 1673 | estack_ax_t = REG_S64; |
3834b99f MD |
1674 | next_pc += sizeof(struct load_op); |
1675 | PO; | |
1676 | } | |
1677 | OP(FILTER_OP_LOAD_FIELD_DOUBLE): | |
1678 | { | |
1679 | ret = -EINVAL; | |
1680 | goto end; | |
1681 | } | |
1682 | ||
1683 | OP(FILTER_OP_LOAD_FIELD_STRING): | |
1684 | { | |
1685 | const char *str; | |
1686 | ||
1687 | dbg_printk("op load field string\n"); | |
1688 | str = (const char *) estack_ax(stack, top)->u.ptr.ptr; | |
1689 | estack_ax(stack, top)->u.s.str = str; | |
1690 | if (unlikely(!estack_ax(stack, top)->u.s.str)) { | |
1691 | dbg_printk("Filter warning: loading a NULL string.\n"); | |
1692 | ret = -EINVAL; | |
1693 | goto end; | |
1694 | } | |
4efe037b | 1695 | estack_ax(stack, top)->u.s.seq_len = LTTNG_SIZE_MAX; |
3834b99f MD |
1696 | estack_ax(stack, top)->u.s.literal_type = |
1697 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
d644d1df | 1698 | estack_ax(stack, top)->type = REG_STRING; |
3834b99f MD |
1699 | next_pc += sizeof(struct load_op); |
1700 | PO; | |
1701 | } | |
1702 | ||
1703 | OP(FILTER_OP_LOAD_FIELD_SEQUENCE): | |
1704 | { | |
1705 | const char *ptr; | |
1706 | ||
1707 | dbg_printk("op load field string sequence\n"); | |
1708 | ptr = estack_ax(stack, top)->u.ptr.ptr; | |
1709 | estack_ax(stack, top)->u.s.seq_len = *(unsigned long *) ptr; | |
1710 | estack_ax(stack, top)->u.s.str = *(const char **) (ptr + sizeof(unsigned long)); | |
1711 | if (unlikely(!estack_ax(stack, top)->u.s.str)) { | |
1712 | dbg_printk("Filter warning: loading a NULL sequence.\n"); | |
1713 | ret = -EINVAL; | |
1714 | goto end; | |
1715 | } | |
1716 | estack_ax(stack, top)->u.s.literal_type = | |
1717 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
d644d1df | 1718 | estack_ax(stack, top)->type = REG_STRING; |
3834b99f MD |
1719 | next_pc += sizeof(struct load_op); |
1720 | PO; | |
1721 | } | |
1722 | ||
07dfc1d0 MD |
1723 | END_OP |
1724 | end: | |
a93d4e71 | 1725 | /* Return _DISCARD on error. */ |
07dfc1d0 | 1726 | if (ret) |
a93d4e71 | 1727 | return LTTNG_FILTER_DISCARD; |
03cb0cdd FD |
1728 | |
1729 | if (output) { | |
1730 | return lttng_bytecode_interpret_format_output( | |
1731 | estack_ax(stack, top), output); | |
1732 | } | |
1733 | ||
07dfc1d0 MD |
1734 | return retval; |
1735 | } | |
03cb0cdd FD |
1736 | LTTNG_STACK_FRAME_NON_STANDARD(bytecode_interpret); |
1737 | ||
1738 | uint64_t lttng_filter_interpret_bytecode(void *filter_data, | |
1739 | struct lttng_probe_ctx *lttng_probe_ctx, | |
1740 | const char *filter_stack_data) | |
1741 | { | |
1742 | return bytecode_interpret(filter_data, lttng_probe_ctx, | |
1743 | filter_stack_data, NULL); | |
1744 | } | |
07dfc1d0 MD |
1745 | |
1746 | #undef START_OP | |
1747 | #undef OP | |
1748 | #undef PO | |
1749 | #undef END_OP |