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 | } | |
432 | return 0; | |
433 | ||
434 | end: | |
435 | return ret; | |
436 | } | |
437 | ||
438 | static int dynamic_load_field(struct estack_entry *stack_top) | |
439 | { | |
440 | int ret; | |
441 | ||
442 | switch (stack_top->u.ptr.type) { | |
443 | case LOAD_OBJECT: | |
444 | break; | |
445 | case LOAD_ROOT_CONTEXT: | |
446 | case LOAD_ROOT_APP_CONTEXT: | |
447 | case LOAD_ROOT_PAYLOAD: | |
448 | default: | |
449 | dbg_printk("Filter warning: cannot load root, missing field name.\n"); | |
450 | ret = -EINVAL; | |
451 | goto end; | |
452 | } | |
453 | switch (stack_top->u.ptr.object_type) { | |
454 | case OBJECT_TYPE_S8: | |
455 | dbg_printk("op load field s8\n"); | |
456 | stack_top->u.v = *(int8_t *) stack_top->u.ptr.ptr; | |
d644d1df | 457 | stack_top->type = REG_S64; |
3834b99f MD |
458 | break; |
459 | case OBJECT_TYPE_S16: | |
460 | { | |
461 | int16_t tmp; | |
462 | ||
463 | dbg_printk("op load field s16\n"); | |
464 | tmp = *(int16_t *) stack_top->u.ptr.ptr; | |
465 | if (stack_top->u.ptr.rev_bo) | |
466 | __swab16s(&tmp); | |
467 | stack_top->u.v = tmp; | |
d644d1df | 468 | stack_top->type = REG_S64; |
3834b99f MD |
469 | break; |
470 | } | |
471 | case OBJECT_TYPE_S32: | |
472 | { | |
473 | int32_t tmp; | |
474 | ||
475 | dbg_printk("op load field s32\n"); | |
476 | tmp = *(int32_t *) stack_top->u.ptr.ptr; | |
477 | if (stack_top->u.ptr.rev_bo) | |
478 | __swab32s(&tmp); | |
479 | stack_top->u.v = tmp; | |
d644d1df | 480 | stack_top->type = REG_S64; |
3834b99f MD |
481 | break; |
482 | } | |
483 | case OBJECT_TYPE_S64: | |
484 | { | |
485 | int64_t tmp; | |
486 | ||
487 | dbg_printk("op load field s64\n"); | |
488 | tmp = *(int64_t *) stack_top->u.ptr.ptr; | |
489 | if (stack_top->u.ptr.rev_bo) | |
490 | __swab64s(&tmp); | |
491 | stack_top->u.v = tmp; | |
d644d1df | 492 | stack_top->type = REG_S64; |
3834b99f MD |
493 | break; |
494 | } | |
495 | case OBJECT_TYPE_U8: | |
496 | dbg_printk("op load field u8\n"); | |
497 | stack_top->u.v = *(uint8_t *) stack_top->u.ptr.ptr; | |
1242217a | 498 | stack_top->type = REG_U64; |
3834b99f MD |
499 | break; |
500 | case OBJECT_TYPE_U16: | |
501 | { | |
502 | uint16_t tmp; | |
503 | ||
5fae98f7 | 504 | dbg_printk("op load field u16\n"); |
3834b99f MD |
505 | tmp = *(uint16_t *) stack_top->u.ptr.ptr; |
506 | if (stack_top->u.ptr.rev_bo) | |
507 | __swab16s(&tmp); | |
508 | stack_top->u.v = tmp; | |
1242217a | 509 | stack_top->type = REG_U64; |
3834b99f MD |
510 | break; |
511 | } | |
512 | case OBJECT_TYPE_U32: | |
513 | { | |
514 | uint32_t tmp; | |
515 | ||
516 | dbg_printk("op load field u32\n"); | |
517 | tmp = *(uint32_t *) stack_top->u.ptr.ptr; | |
518 | if (stack_top->u.ptr.rev_bo) | |
519 | __swab32s(&tmp); | |
520 | stack_top->u.v = tmp; | |
1242217a | 521 | stack_top->type = REG_U64; |
3834b99f MD |
522 | break; |
523 | } | |
524 | case OBJECT_TYPE_U64: | |
525 | { | |
526 | uint64_t tmp; | |
527 | ||
528 | dbg_printk("op load field u64\n"); | |
529 | tmp = *(uint64_t *) stack_top->u.ptr.ptr; | |
530 | if (stack_top->u.ptr.rev_bo) | |
531 | __swab64s(&tmp); | |
532 | stack_top->u.v = tmp; | |
1242217a | 533 | stack_top->type = REG_U64; |
3834b99f MD |
534 | break; |
535 | } | |
536 | case OBJECT_TYPE_STRING: | |
537 | { | |
538 | const char *str; | |
539 | ||
540 | dbg_printk("op load field string\n"); | |
541 | str = (const char *) stack_top->u.ptr.ptr; | |
542 | stack_top->u.s.str = str; | |
543 | if (unlikely(!stack_top->u.s.str)) { | |
544 | dbg_printk("Filter warning: loading a NULL string.\n"); | |
545 | ret = -EINVAL; | |
546 | goto end; | |
547 | } | |
4efe037b | 548 | stack_top->u.s.seq_len = LTTNG_SIZE_MAX; |
3834b99f MD |
549 | stack_top->u.s.literal_type = |
550 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
d644d1df | 551 | stack_top->type = REG_STRING; |
3834b99f MD |
552 | break; |
553 | } | |
554 | case OBJECT_TYPE_STRING_SEQUENCE: | |
555 | { | |
556 | const char *ptr; | |
557 | ||
558 | dbg_printk("op load field string sequence\n"); | |
559 | ptr = stack_top->u.ptr.ptr; | |
560 | stack_top->u.s.seq_len = *(unsigned long *) ptr; | |
561 | stack_top->u.s.str = *(const char **) (ptr + sizeof(unsigned long)); | |
562 | if (unlikely(!stack_top->u.s.str)) { | |
563 | dbg_printk("Filter warning: loading a NULL sequence.\n"); | |
564 | ret = -EINVAL; | |
565 | goto end; | |
566 | } | |
567 | stack_top->u.s.literal_type = | |
568 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
d644d1df | 569 | stack_top->type = REG_STRING; |
3834b99f MD |
570 | break; |
571 | } | |
572 | case OBJECT_TYPE_DYNAMIC: | |
573 | /* | |
574 | * Dynamic types in context are looked up | |
575 | * by context get index. | |
576 | */ | |
577 | ret = -EINVAL; | |
578 | goto end; | |
579 | case OBJECT_TYPE_DOUBLE: | |
580 | ret = -EINVAL; | |
581 | goto end; | |
582 | case OBJECT_TYPE_SEQUENCE: | |
583 | case OBJECT_TYPE_ARRAY: | |
584 | case OBJECT_TYPE_STRUCT: | |
585 | case OBJECT_TYPE_VARIANT: | |
5a15f70c | 586 | printk(KERN_WARNING "LTTng: filter: Sequences, arrays, struct and variant cannot be loaded (nested types).\n"); |
3834b99f MD |
587 | ret = -EINVAL; |
588 | goto end; | |
589 | } | |
590 | return 0; | |
591 | ||
592 | end: | |
593 | return ret; | |
594 | } | |
595 | ||
03cb0cdd FD |
596 | static |
597 | int lttng_bytecode_interpret_format_output(struct estack_entry *ax, | |
598 | struct lttng_interpreter_output *output) | |
599 | { | |
600 | int ret; | |
601 | ||
602 | again: | |
603 | switch (ax->type) { | |
604 | case REG_S64: | |
605 | output->type = LTTNG_INTERPRETER_TYPE_S64; | |
606 | output->u.s = ax->u.v; | |
607 | break; | |
608 | case REG_U64: | |
609 | output->type = LTTNG_INTERPRETER_TYPE_U64; | |
610 | output->u.u = (uint64_t) ax->u.v; | |
611 | break; | |
612 | case REG_STRING: | |
613 | output->type = LTTNG_INTERPRETER_TYPE_STRING; | |
614 | output->u.str.str = ax->u.s.str; | |
615 | output->u.str.len = ax->u.s.seq_len; | |
616 | break; | |
617 | case REG_PTR: | |
618 | switch (ax->u.ptr.object_type) { | |
619 | case OBJECT_TYPE_S8: | |
620 | case OBJECT_TYPE_S16: | |
621 | case OBJECT_TYPE_S32: | |
622 | case OBJECT_TYPE_S64: | |
623 | case OBJECT_TYPE_U8: | |
624 | case OBJECT_TYPE_U16: | |
625 | case OBJECT_TYPE_U32: | |
626 | case OBJECT_TYPE_U64: | |
627 | case OBJECT_TYPE_DOUBLE: | |
628 | case OBJECT_TYPE_STRING: | |
629 | case OBJECT_TYPE_STRING_SEQUENCE: | |
630 | ret = dynamic_load_field(ax); | |
631 | if (ret) | |
632 | return ret; | |
633 | /* Retry after loading ptr into stack top. */ | |
634 | goto again; | |
635 | case OBJECT_TYPE_SEQUENCE: | |
636 | output->type = LTTNG_INTERPRETER_TYPE_SEQUENCE; | |
637 | output->u.sequence.ptr = *(const char **) (ax->u.ptr.ptr + sizeof(unsigned long)); | |
638 | output->u.sequence.nr_elem = *(unsigned long *) ax->u.ptr.ptr; | |
639 | output->u.sequence.nested_type = ax->u.ptr.field->type.u.sequence_nestable.elem_type; | |
640 | break; | |
641 | case OBJECT_TYPE_ARRAY: | |
642 | /* Skip count (unsigned long) */ | |
643 | output->type = LTTNG_INTERPRETER_TYPE_SEQUENCE; | |
644 | output->u.sequence.ptr = *(const char **) (ax->u.ptr.ptr + sizeof(unsigned long)); | |
645 | output->u.sequence.nr_elem = ax->u.ptr.field->type.u.array_nestable.length; | |
646 | output->u.sequence.nested_type = ax->u.ptr.field->type.u.array_nestable.elem_type; | |
647 | break; | |
648 | case OBJECT_TYPE_STRUCT: | |
649 | case OBJECT_TYPE_VARIANT: | |
650 | default: | |
651 | return -EINVAL; | |
652 | } | |
653 | ||
654 | break; | |
655 | case REG_STAR_GLOB_STRING: | |
656 | case REG_TYPE_UNKNOWN: | |
657 | default: | |
658 | return -EINVAL; | |
659 | } | |
660 | ||
661 | return LTTNG_FILTER_RECORD_FLAG; | |
662 | } | |
663 | ||
07dfc1d0 MD |
664 | /* |
665 | * Return 0 (discard), or raise the 0x1 flag (log event). | |
666 | * Currently, other flags are kept for future extensions and have no | |
667 | * effect. | |
668 | */ | |
03cb0cdd FD |
669 | static |
670 | uint64_t bytecode_interpret(void *interpreter_data, | |
79150a49 | 671 | struct lttng_probe_ctx *lttng_probe_ctx, |
03cb0cdd FD |
672 | const char *interpreter_stack_data, |
673 | struct lttng_interpreter_output *output) | |
07dfc1d0 | 674 | { |
03cb0cdd | 675 | struct bytecode_runtime *bytecode = interpreter_data; |
07dfc1d0 MD |
676 | void *pc, *next_pc, *start_pc; |
677 | int ret = -EINVAL; | |
678 | uint64_t retval = 0; | |
679 | struct estack _stack; | |
680 | struct estack *stack = &_stack; | |
681 | register int64_t ax = 0, bx = 0; | |
d644d1df | 682 | register enum entry_type ax_t = REG_TYPE_UNKNOWN, bx_t = REG_TYPE_UNKNOWN; |
07dfc1d0 MD |
683 | register int top = FILTER_STACK_EMPTY; |
684 | #ifndef INTERPRETER_USE_SWITCH | |
685 | static void *dispatch[NR_FILTER_OPS] = { | |
686 | [ FILTER_OP_UNKNOWN ] = &&LABEL_FILTER_OP_UNKNOWN, | |
687 | ||
688 | [ FILTER_OP_RETURN ] = &&LABEL_FILTER_OP_RETURN, | |
689 | ||
690 | /* binary */ | |
691 | [ FILTER_OP_MUL ] = &&LABEL_FILTER_OP_MUL, | |
692 | [ FILTER_OP_DIV ] = &&LABEL_FILTER_OP_DIV, | |
693 | [ FILTER_OP_MOD ] = &&LABEL_FILTER_OP_MOD, | |
694 | [ FILTER_OP_PLUS ] = &&LABEL_FILTER_OP_PLUS, | |
695 | [ FILTER_OP_MINUS ] = &&LABEL_FILTER_OP_MINUS, | |
e16c054b MD |
696 | [ FILTER_OP_BIT_RSHIFT ] = &&LABEL_FILTER_OP_BIT_RSHIFT, |
697 | [ FILTER_OP_BIT_LSHIFT ] = &&LABEL_FILTER_OP_BIT_LSHIFT, | |
3834b99f MD |
698 | [ FILTER_OP_BIT_AND ] = &&LABEL_FILTER_OP_BIT_AND, |
699 | [ FILTER_OP_BIT_OR ] = &&LABEL_FILTER_OP_BIT_OR, | |
700 | [ FILTER_OP_BIT_XOR ] = &&LABEL_FILTER_OP_BIT_XOR, | |
07dfc1d0 MD |
701 | |
702 | /* binary comparators */ | |
703 | [ FILTER_OP_EQ ] = &&LABEL_FILTER_OP_EQ, | |
704 | [ FILTER_OP_NE ] = &&LABEL_FILTER_OP_NE, | |
705 | [ FILTER_OP_GT ] = &&LABEL_FILTER_OP_GT, | |
706 | [ FILTER_OP_LT ] = &&LABEL_FILTER_OP_LT, | |
707 | [ FILTER_OP_GE ] = &&LABEL_FILTER_OP_GE, | |
708 | [ FILTER_OP_LE ] = &&LABEL_FILTER_OP_LE, | |
709 | ||
710 | /* string binary comparator */ | |
711 | [ FILTER_OP_EQ_STRING ] = &&LABEL_FILTER_OP_EQ_STRING, | |
712 | [ FILTER_OP_NE_STRING ] = &&LABEL_FILTER_OP_NE_STRING, | |
713 | [ FILTER_OP_GT_STRING ] = &&LABEL_FILTER_OP_GT_STRING, | |
714 | [ FILTER_OP_LT_STRING ] = &&LABEL_FILTER_OP_LT_STRING, | |
715 | [ FILTER_OP_GE_STRING ] = &&LABEL_FILTER_OP_GE_STRING, | |
716 | [ FILTER_OP_LE_STRING ] = &&LABEL_FILTER_OP_LE_STRING, | |
717 | ||
02aca193 PP |
718 | /* globbing pattern binary comparator */ |
719 | [ FILTER_OP_EQ_STAR_GLOB_STRING ] = &&LABEL_FILTER_OP_EQ_STAR_GLOB_STRING, | |
720 | [ FILTER_OP_NE_STAR_GLOB_STRING ] = &&LABEL_FILTER_OP_NE_STAR_GLOB_STRING, | |
721 | ||
07dfc1d0 MD |
722 | /* s64 binary comparator */ |
723 | [ FILTER_OP_EQ_S64 ] = &&LABEL_FILTER_OP_EQ_S64, | |
724 | [ FILTER_OP_NE_S64 ] = &&LABEL_FILTER_OP_NE_S64, | |
725 | [ FILTER_OP_GT_S64 ] = &&LABEL_FILTER_OP_GT_S64, | |
726 | [ FILTER_OP_LT_S64 ] = &&LABEL_FILTER_OP_LT_S64, | |
727 | [ FILTER_OP_GE_S64 ] = &&LABEL_FILTER_OP_GE_S64, | |
728 | [ FILTER_OP_LE_S64 ] = &&LABEL_FILTER_OP_LE_S64, | |
729 | ||
730 | /* double binary comparator */ | |
731 | [ FILTER_OP_EQ_DOUBLE ] = &&LABEL_FILTER_OP_EQ_DOUBLE, | |
732 | [ FILTER_OP_NE_DOUBLE ] = &&LABEL_FILTER_OP_NE_DOUBLE, | |
733 | [ FILTER_OP_GT_DOUBLE ] = &&LABEL_FILTER_OP_GT_DOUBLE, | |
734 | [ FILTER_OP_LT_DOUBLE ] = &&LABEL_FILTER_OP_LT_DOUBLE, | |
735 | [ FILTER_OP_GE_DOUBLE ] = &&LABEL_FILTER_OP_GE_DOUBLE, | |
736 | [ FILTER_OP_LE_DOUBLE ] = &&LABEL_FILTER_OP_LE_DOUBLE, | |
737 | ||
738 | /* Mixed S64-double binary comparators */ | |
739 | [ FILTER_OP_EQ_DOUBLE_S64 ] = &&LABEL_FILTER_OP_EQ_DOUBLE_S64, | |
740 | [ FILTER_OP_NE_DOUBLE_S64 ] = &&LABEL_FILTER_OP_NE_DOUBLE_S64, | |
741 | [ FILTER_OP_GT_DOUBLE_S64 ] = &&LABEL_FILTER_OP_GT_DOUBLE_S64, | |
742 | [ FILTER_OP_LT_DOUBLE_S64 ] = &&LABEL_FILTER_OP_LT_DOUBLE_S64, | |
743 | [ FILTER_OP_GE_DOUBLE_S64 ] = &&LABEL_FILTER_OP_GE_DOUBLE_S64, | |
744 | [ FILTER_OP_LE_DOUBLE_S64 ] = &&LABEL_FILTER_OP_LE_DOUBLE_S64, | |
745 | ||
746 | [ FILTER_OP_EQ_S64_DOUBLE ] = &&LABEL_FILTER_OP_EQ_S64_DOUBLE, | |
747 | [ FILTER_OP_NE_S64_DOUBLE ] = &&LABEL_FILTER_OP_NE_S64_DOUBLE, | |
748 | [ FILTER_OP_GT_S64_DOUBLE ] = &&LABEL_FILTER_OP_GT_S64_DOUBLE, | |
749 | [ FILTER_OP_LT_S64_DOUBLE ] = &&LABEL_FILTER_OP_LT_S64_DOUBLE, | |
750 | [ FILTER_OP_GE_S64_DOUBLE ] = &&LABEL_FILTER_OP_GE_S64_DOUBLE, | |
751 | [ FILTER_OP_LE_S64_DOUBLE ] = &&LABEL_FILTER_OP_LE_S64_DOUBLE, | |
752 | ||
753 | /* unary */ | |
754 | [ FILTER_OP_UNARY_PLUS ] = &&LABEL_FILTER_OP_UNARY_PLUS, | |
755 | [ FILTER_OP_UNARY_MINUS ] = &&LABEL_FILTER_OP_UNARY_MINUS, | |
756 | [ FILTER_OP_UNARY_NOT ] = &&LABEL_FILTER_OP_UNARY_NOT, | |
757 | [ FILTER_OP_UNARY_PLUS_S64 ] = &&LABEL_FILTER_OP_UNARY_PLUS_S64, | |
758 | [ FILTER_OP_UNARY_MINUS_S64 ] = &&LABEL_FILTER_OP_UNARY_MINUS_S64, | |
759 | [ FILTER_OP_UNARY_NOT_S64 ] = &&LABEL_FILTER_OP_UNARY_NOT_S64, | |
760 | [ FILTER_OP_UNARY_PLUS_DOUBLE ] = &&LABEL_FILTER_OP_UNARY_PLUS_DOUBLE, | |
761 | [ FILTER_OP_UNARY_MINUS_DOUBLE ] = &&LABEL_FILTER_OP_UNARY_MINUS_DOUBLE, | |
762 | [ FILTER_OP_UNARY_NOT_DOUBLE ] = &&LABEL_FILTER_OP_UNARY_NOT_DOUBLE, | |
763 | ||
764 | /* logical */ | |
765 | [ FILTER_OP_AND ] = &&LABEL_FILTER_OP_AND, | |
766 | [ FILTER_OP_OR ] = &&LABEL_FILTER_OP_OR, | |
767 | ||
768 | /* load field ref */ | |
769 | [ FILTER_OP_LOAD_FIELD_REF ] = &&LABEL_FILTER_OP_LOAD_FIELD_REF, | |
770 | [ FILTER_OP_LOAD_FIELD_REF_STRING ] = &&LABEL_FILTER_OP_LOAD_FIELD_REF_STRING, | |
771 | [ FILTER_OP_LOAD_FIELD_REF_SEQUENCE ] = &&LABEL_FILTER_OP_LOAD_FIELD_REF_SEQUENCE, | |
772 | [ FILTER_OP_LOAD_FIELD_REF_S64 ] = &&LABEL_FILTER_OP_LOAD_FIELD_REF_S64, | |
773 | [ FILTER_OP_LOAD_FIELD_REF_DOUBLE ] = &&LABEL_FILTER_OP_LOAD_FIELD_REF_DOUBLE, | |
774 | ||
775 | /* load from immediate operand */ | |
776 | [ FILTER_OP_LOAD_STRING ] = &&LABEL_FILTER_OP_LOAD_STRING, | |
02aca193 | 777 | [ FILTER_OP_LOAD_STAR_GLOB_STRING ] = &&LABEL_FILTER_OP_LOAD_STAR_GLOB_STRING, |
07dfc1d0 MD |
778 | [ FILTER_OP_LOAD_S64 ] = &&LABEL_FILTER_OP_LOAD_S64, |
779 | [ FILTER_OP_LOAD_DOUBLE ] = &&LABEL_FILTER_OP_LOAD_DOUBLE, | |
780 | ||
781 | /* cast */ | |
782 | [ FILTER_OP_CAST_TO_S64 ] = &&LABEL_FILTER_OP_CAST_TO_S64, | |
783 | [ FILTER_OP_CAST_DOUBLE_TO_S64 ] = &&LABEL_FILTER_OP_CAST_DOUBLE_TO_S64, | |
784 | [ FILTER_OP_CAST_NOP ] = &&LABEL_FILTER_OP_CAST_NOP, | |
785 | ||
786 | /* get context ref */ | |
787 | [ FILTER_OP_GET_CONTEXT_REF ] = &&LABEL_FILTER_OP_GET_CONTEXT_REF, | |
788 | [ FILTER_OP_GET_CONTEXT_REF_STRING ] = &&LABEL_FILTER_OP_GET_CONTEXT_REF_STRING, | |
789 | [ FILTER_OP_GET_CONTEXT_REF_S64 ] = &&LABEL_FILTER_OP_GET_CONTEXT_REF_S64, | |
790 | [ FILTER_OP_GET_CONTEXT_REF_DOUBLE ] = &&LABEL_FILTER_OP_GET_CONTEXT_REF_DOUBLE, | |
f127e61e MD |
791 | |
792 | /* load userspace field ref */ | |
793 | [ FILTER_OP_LOAD_FIELD_REF_USER_STRING ] = &&LABEL_FILTER_OP_LOAD_FIELD_REF_USER_STRING, | |
794 | [ FILTER_OP_LOAD_FIELD_REF_USER_SEQUENCE ] = &&LABEL_FILTER_OP_LOAD_FIELD_REF_USER_SEQUENCE, | |
3834b99f MD |
795 | |
796 | /* Instructions for recursive traversal through composed types. */ | |
797 | [ FILTER_OP_GET_CONTEXT_ROOT ] = &&LABEL_FILTER_OP_GET_CONTEXT_ROOT, | |
798 | [ FILTER_OP_GET_APP_CONTEXT_ROOT ] = &&LABEL_FILTER_OP_GET_APP_CONTEXT_ROOT, | |
799 | [ FILTER_OP_GET_PAYLOAD_ROOT ] = &&LABEL_FILTER_OP_GET_PAYLOAD_ROOT, | |
800 | ||
801 | [ FILTER_OP_GET_SYMBOL ] = &&LABEL_FILTER_OP_GET_SYMBOL, | |
802 | [ FILTER_OP_GET_SYMBOL_FIELD ] = &&LABEL_FILTER_OP_GET_SYMBOL_FIELD, | |
803 | [ FILTER_OP_GET_INDEX_U16 ] = &&LABEL_FILTER_OP_GET_INDEX_U16, | |
804 | [ FILTER_OP_GET_INDEX_U64 ] = &&LABEL_FILTER_OP_GET_INDEX_U64, | |
805 | ||
806 | [ FILTER_OP_LOAD_FIELD ] = &&LABEL_FILTER_OP_LOAD_FIELD, | |
807 | [ FILTER_OP_LOAD_FIELD_S8 ] = &&LABEL_FILTER_OP_LOAD_FIELD_S8, | |
808 | [ FILTER_OP_LOAD_FIELD_S16 ] = &&LABEL_FILTER_OP_LOAD_FIELD_S16, | |
809 | [ FILTER_OP_LOAD_FIELD_S32 ] = &&LABEL_FILTER_OP_LOAD_FIELD_S32, | |
810 | [ FILTER_OP_LOAD_FIELD_S64 ] = &&LABEL_FILTER_OP_LOAD_FIELD_S64, | |
811 | [ FILTER_OP_LOAD_FIELD_U8 ] = &&LABEL_FILTER_OP_LOAD_FIELD_U8, | |
812 | [ FILTER_OP_LOAD_FIELD_U16 ] = &&LABEL_FILTER_OP_LOAD_FIELD_U16, | |
813 | [ FILTER_OP_LOAD_FIELD_U32 ] = &&LABEL_FILTER_OP_LOAD_FIELD_U32, | |
814 | [ FILTER_OP_LOAD_FIELD_U64 ] = &&LABEL_FILTER_OP_LOAD_FIELD_U64, | |
815 | [ FILTER_OP_LOAD_FIELD_STRING ] = &&LABEL_FILTER_OP_LOAD_FIELD_STRING, | |
816 | [ FILTER_OP_LOAD_FIELD_SEQUENCE ] = &&LABEL_FILTER_OP_LOAD_FIELD_SEQUENCE, | |
817 | [ FILTER_OP_LOAD_FIELD_DOUBLE ] = &&LABEL_FILTER_OP_LOAD_FIELD_DOUBLE, | |
e16c054b MD |
818 | |
819 | [ FILTER_OP_UNARY_BIT_NOT ] = &&LABEL_FILTER_OP_UNARY_BIT_NOT, | |
57ba4b41 MD |
820 | |
821 | [ FILTER_OP_RETURN_S64 ] = &&LABEL_FILTER_OP_RETURN_S64, | |
07dfc1d0 MD |
822 | }; |
823 | #endif /* #ifndef INTERPRETER_USE_SWITCH */ | |
824 | ||
825 | START_OP | |
826 | ||
827 | OP(FILTER_OP_UNKNOWN): | |
828 | OP(FILTER_OP_LOAD_FIELD_REF): | |
829 | OP(FILTER_OP_GET_CONTEXT_REF): | |
830 | #ifdef INTERPRETER_USE_SWITCH | |
831 | default: | |
832 | #endif /* INTERPRETER_USE_SWITCH */ | |
5a15f70c | 833 | printk(KERN_WARNING "LTTng: filter: unknown bytecode op %u\n", |
07dfc1d0 MD |
834 | (unsigned int) *(filter_opcode_t *) pc); |
835 | ret = -EINVAL; | |
836 | goto end; | |
837 | ||
838 | OP(FILTER_OP_RETURN): | |
57ba4b41 | 839 | OP(FILTER_OP_RETURN_S64): |
a93d4e71 | 840 | /* LTTNG_FILTER_DISCARD or LTTNG_FILTER_RECORD_FLAG */ |
d644d1df FD |
841 | switch (estack_ax_t) { |
842 | case REG_S64: | |
1242217a | 843 | case REG_U64: |
d644d1df FD |
844 | retval = !!estack_ax_v; |
845 | break; | |
846 | case REG_DOUBLE: | |
847 | case REG_STRING: | |
848 | case REG_PTR: | |
03cb0cdd FD |
849 | if (!output) { |
850 | ret = -EINVAL; | |
851 | goto end; | |
852 | } | |
853 | retval = 0; | |
854 | break; | |
d644d1df FD |
855 | case REG_STAR_GLOB_STRING: |
856 | case REG_TYPE_UNKNOWN: | |
857 | ret = -EINVAL; | |
858 | goto end; | |
859 | } | |
07dfc1d0 MD |
860 | ret = 0; |
861 | goto end; | |
862 | ||
863 | /* binary */ | |
864 | OP(FILTER_OP_MUL): | |
865 | OP(FILTER_OP_DIV): | |
866 | OP(FILTER_OP_MOD): | |
867 | OP(FILTER_OP_PLUS): | |
868 | OP(FILTER_OP_MINUS): | |
5a15f70c | 869 | printk(KERN_WARNING "LTTng: filter: unsupported bytecode op %u\n", |
07dfc1d0 MD |
870 | (unsigned int) *(filter_opcode_t *) pc); |
871 | ret = -EINVAL; | |
872 | goto end; | |
873 | ||
874 | OP(FILTER_OP_EQ): | |
875 | OP(FILTER_OP_NE): | |
876 | OP(FILTER_OP_GT): | |
877 | OP(FILTER_OP_LT): | |
878 | OP(FILTER_OP_GE): | |
879 | OP(FILTER_OP_LE): | |
5a15f70c | 880 | printk(KERN_WARNING "LTTng: filter: unsupported non-specialized bytecode op %u\n", |
07dfc1d0 MD |
881 | (unsigned int) *(filter_opcode_t *) pc); |
882 | ret = -EINVAL; | |
883 | goto end; | |
884 | ||
885 | OP(FILTER_OP_EQ_STRING): | |
886 | { | |
887 | int res; | |
888 | ||
889 | res = (stack_strcmp(stack, top, "==") == 0); | |
d644d1df | 890 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 891 | estack_ax_v = res; |
d644d1df | 892 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
893 | next_pc += sizeof(struct binary_op); |
894 | PO; | |
895 | } | |
896 | OP(FILTER_OP_NE_STRING): | |
897 | { | |
898 | int res; | |
899 | ||
900 | res = (stack_strcmp(stack, top, "!=") != 0); | |
d644d1df | 901 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 902 | estack_ax_v = res; |
d644d1df | 903 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
904 | next_pc += sizeof(struct binary_op); |
905 | PO; | |
906 | } | |
907 | OP(FILTER_OP_GT_STRING): | |
908 | { | |
909 | int res; | |
910 | ||
911 | res = (stack_strcmp(stack, top, ">") > 0); | |
d644d1df | 912 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 913 | estack_ax_v = res; |
d644d1df | 914 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
915 | next_pc += sizeof(struct binary_op); |
916 | PO; | |
917 | } | |
918 | OP(FILTER_OP_LT_STRING): | |
919 | { | |
920 | int res; | |
921 | ||
922 | res = (stack_strcmp(stack, top, "<") < 0); | |
d644d1df | 923 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 924 | estack_ax_v = res; |
d644d1df | 925 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
926 | next_pc += sizeof(struct binary_op); |
927 | PO; | |
928 | } | |
929 | OP(FILTER_OP_GE_STRING): | |
930 | { | |
931 | int res; | |
932 | ||
933 | res = (stack_strcmp(stack, top, ">=") >= 0); | |
d644d1df | 934 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 935 | estack_ax_v = res; |
d644d1df | 936 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
937 | next_pc += sizeof(struct binary_op); |
938 | PO; | |
939 | } | |
940 | OP(FILTER_OP_LE_STRING): | |
941 | { | |
942 | int res; | |
943 | ||
944 | res = (stack_strcmp(stack, top, "<=") <= 0); | |
d644d1df | 945 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 946 | estack_ax_v = res; |
d644d1df | 947 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
948 | next_pc += sizeof(struct binary_op); |
949 | PO; | |
950 | } | |
951 | ||
02aca193 PP |
952 | OP(FILTER_OP_EQ_STAR_GLOB_STRING): |
953 | { | |
954 | int res; | |
955 | ||
956 | res = (stack_star_glob_match(stack, top, "==") == 0); | |
d644d1df | 957 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
02aca193 | 958 | estack_ax_v = res; |
d644d1df | 959 | estack_ax_t = REG_S64; |
02aca193 PP |
960 | next_pc += sizeof(struct binary_op); |
961 | PO; | |
962 | } | |
963 | OP(FILTER_OP_NE_STAR_GLOB_STRING): | |
964 | { | |
965 | int res; | |
966 | ||
967 | res = (stack_star_glob_match(stack, top, "!=") != 0); | |
d644d1df | 968 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
02aca193 | 969 | estack_ax_v = res; |
d644d1df | 970 | estack_ax_t = REG_S64; |
02aca193 PP |
971 | next_pc += sizeof(struct binary_op); |
972 | PO; | |
973 | } | |
974 | ||
07dfc1d0 MD |
975 | OP(FILTER_OP_EQ_S64): |
976 | { | |
977 | int res; | |
978 | ||
979 | res = (estack_bx_v == estack_ax_v); | |
d644d1df | 980 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 981 | estack_ax_v = res; |
d644d1df | 982 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
983 | next_pc += sizeof(struct binary_op); |
984 | PO; | |
985 | } | |
986 | OP(FILTER_OP_NE_S64): | |
987 | { | |
988 | int res; | |
989 | ||
990 | res = (estack_bx_v != estack_ax_v); | |
d644d1df | 991 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 992 | estack_ax_v = res; |
d644d1df | 993 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
994 | next_pc += sizeof(struct binary_op); |
995 | PO; | |
996 | } | |
997 | OP(FILTER_OP_GT_S64): | |
998 | { | |
999 | int res; | |
1000 | ||
1001 | res = (estack_bx_v > estack_ax_v); | |
d644d1df | 1002 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 1003 | estack_ax_v = res; |
d644d1df | 1004 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
1005 | next_pc += sizeof(struct binary_op); |
1006 | PO; | |
1007 | } | |
1008 | OP(FILTER_OP_LT_S64): | |
1009 | { | |
1010 | int res; | |
1011 | ||
1012 | res = (estack_bx_v < estack_ax_v); | |
d644d1df | 1013 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 1014 | estack_ax_v = res; |
d644d1df | 1015 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
1016 | next_pc += sizeof(struct binary_op); |
1017 | PO; | |
1018 | } | |
1019 | OP(FILTER_OP_GE_S64): | |
1020 | { | |
1021 | int res; | |
1022 | ||
1023 | res = (estack_bx_v >= estack_ax_v); | |
d644d1df | 1024 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 1025 | estack_ax_v = res; |
d644d1df | 1026 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
1027 | next_pc += sizeof(struct binary_op); |
1028 | PO; | |
1029 | } | |
1030 | OP(FILTER_OP_LE_S64): | |
1031 | { | |
1032 | int res; | |
1033 | ||
1034 | res = (estack_bx_v <= estack_ax_v); | |
d644d1df | 1035 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 1036 | estack_ax_v = res; |
d644d1df | 1037 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
1038 | next_pc += sizeof(struct binary_op); |
1039 | PO; | |
1040 | } | |
1041 | ||
1042 | OP(FILTER_OP_EQ_DOUBLE): | |
1043 | OP(FILTER_OP_NE_DOUBLE): | |
1044 | OP(FILTER_OP_GT_DOUBLE): | |
1045 | OP(FILTER_OP_LT_DOUBLE): | |
1046 | OP(FILTER_OP_GE_DOUBLE): | |
1047 | OP(FILTER_OP_LE_DOUBLE): | |
1048 | { | |
1049 | BUG_ON(1); | |
1050 | PO; | |
1051 | } | |
1052 | ||
1053 | /* Mixed S64-double binary comparators */ | |
1054 | OP(FILTER_OP_EQ_DOUBLE_S64): | |
1055 | OP(FILTER_OP_NE_DOUBLE_S64): | |
1056 | OP(FILTER_OP_GT_DOUBLE_S64): | |
1057 | OP(FILTER_OP_LT_DOUBLE_S64): | |
1058 | OP(FILTER_OP_GE_DOUBLE_S64): | |
1059 | OP(FILTER_OP_LE_DOUBLE_S64): | |
1060 | OP(FILTER_OP_EQ_S64_DOUBLE): | |
1061 | OP(FILTER_OP_NE_S64_DOUBLE): | |
1062 | OP(FILTER_OP_GT_S64_DOUBLE): | |
1063 | OP(FILTER_OP_LT_S64_DOUBLE): | |
1064 | OP(FILTER_OP_GE_S64_DOUBLE): | |
1065 | OP(FILTER_OP_LE_S64_DOUBLE): | |
1066 | { | |
1067 | BUG_ON(1); | |
1068 | PO; | |
1069 | } | |
e16c054b MD |
1070 | OP(FILTER_OP_BIT_RSHIFT): |
1071 | { | |
1072 | int64_t res; | |
1073 | ||
d644d1df FD |
1074 | if (!IS_INTEGER_REGISTER(estack_ax_t) || !IS_INTEGER_REGISTER(estack_bx_t)) { |
1075 | ret = -EINVAL; | |
1076 | goto end; | |
1077 | } | |
1078 | ||
ea13ec96 MD |
1079 | /* Catch undefined behavior. */ |
1080 | if (unlikely(estack_ax_v < 0 || estack_ax_v >= 64)) { | |
1081 | ret = -EINVAL; | |
1082 | goto end; | |
1083 | } | |
f8d42740 | 1084 | res = ((uint64_t) estack_bx_v >> (uint32_t) estack_ax_v); |
d644d1df | 1085 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
e16c054b | 1086 | estack_ax_v = res; |
1242217a | 1087 | estack_ax_t = REG_U64; |
e16c054b MD |
1088 | next_pc += sizeof(struct binary_op); |
1089 | PO; | |
1090 | } | |
1091 | OP(FILTER_OP_BIT_LSHIFT): | |
1092 | { | |
1093 | int64_t res; | |
1094 | ||
d644d1df FD |
1095 | if (!IS_INTEGER_REGISTER(estack_ax_t) || !IS_INTEGER_REGISTER(estack_bx_t)) { |
1096 | ret = -EINVAL; | |
1097 | goto end; | |
1098 | } | |
1099 | ||
ea13ec96 MD |
1100 | /* Catch undefined behavior. */ |
1101 | if (unlikely(estack_ax_v < 0 || estack_ax_v >= 64)) { | |
1102 | ret = -EINVAL; | |
1103 | goto end; | |
1104 | } | |
f8d42740 | 1105 | res = ((uint64_t) estack_bx_v << (uint32_t) estack_ax_v); |
d644d1df | 1106 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
e16c054b | 1107 | estack_ax_v = res; |
1242217a | 1108 | estack_ax_t = REG_U64; |
e16c054b MD |
1109 | next_pc += sizeof(struct binary_op); |
1110 | PO; | |
1111 | } | |
3834b99f MD |
1112 | OP(FILTER_OP_BIT_AND): |
1113 | { | |
1114 | int64_t res; | |
1115 | ||
d644d1df FD |
1116 | if (!IS_INTEGER_REGISTER(estack_ax_t) || !IS_INTEGER_REGISTER(estack_bx_t)) { |
1117 | ret = -EINVAL; | |
1118 | goto end; | |
1119 | } | |
1120 | ||
f8d42740 | 1121 | res = ((uint64_t) estack_bx_v & (uint64_t) estack_ax_v); |
d644d1df | 1122 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
3834b99f | 1123 | estack_ax_v = res; |
1242217a | 1124 | estack_ax_t = REG_U64; |
3834b99f MD |
1125 | next_pc += sizeof(struct binary_op); |
1126 | PO; | |
1127 | } | |
1128 | OP(FILTER_OP_BIT_OR): | |
1129 | { | |
1130 | int64_t res; | |
1131 | ||
d644d1df FD |
1132 | if (!IS_INTEGER_REGISTER(estack_ax_t) || !IS_INTEGER_REGISTER(estack_bx_t)) { |
1133 | ret = -EINVAL; | |
1134 | goto end; | |
1135 | } | |
1136 | ||
f8d42740 | 1137 | res = ((uint64_t) estack_bx_v | (uint64_t) estack_ax_v); |
d644d1df | 1138 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
3834b99f | 1139 | estack_ax_v = res; |
1242217a | 1140 | estack_ax_t = REG_U64; |
3834b99f MD |
1141 | next_pc += sizeof(struct binary_op); |
1142 | PO; | |
1143 | } | |
1144 | OP(FILTER_OP_BIT_XOR): | |
1145 | { | |
1146 | int64_t res; | |
1147 | ||
d644d1df FD |
1148 | if (!IS_INTEGER_REGISTER(estack_ax_t) || !IS_INTEGER_REGISTER(estack_bx_t)) { |
1149 | ret = -EINVAL; | |
1150 | goto end; | |
1151 | } | |
1152 | ||
f8d42740 | 1153 | res = ((uint64_t) estack_bx_v ^ (uint64_t) estack_ax_v); |
d644d1df | 1154 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
3834b99f | 1155 | estack_ax_v = res; |
1242217a | 1156 | estack_ax_t = REG_U64; |
3834b99f MD |
1157 | next_pc += sizeof(struct binary_op); |
1158 | PO; | |
1159 | } | |
07dfc1d0 MD |
1160 | |
1161 | /* unary */ | |
1162 | OP(FILTER_OP_UNARY_PLUS): | |
1163 | OP(FILTER_OP_UNARY_MINUS): | |
1164 | OP(FILTER_OP_UNARY_NOT): | |
5a15f70c | 1165 | printk(KERN_WARNING "LTTng: filter: unsupported non-specialized bytecode op %u\n", |
07dfc1d0 MD |
1166 | (unsigned int) *(filter_opcode_t *) pc); |
1167 | ret = -EINVAL; | |
1168 | goto end; | |
1169 | ||
1170 | ||
e16c054b MD |
1171 | OP(FILTER_OP_UNARY_BIT_NOT): |
1172 | { | |
f8d42740 | 1173 | estack_ax_v = ~(uint64_t) estack_ax_v; |
d644d1df | 1174 | estack_ax_t = REG_S64; |
e16c054b MD |
1175 | next_pc += sizeof(struct unary_op); |
1176 | PO; | |
1177 | } | |
1178 | ||
07dfc1d0 MD |
1179 | OP(FILTER_OP_UNARY_PLUS_S64): |
1180 | { | |
1181 | next_pc += sizeof(struct unary_op); | |
1182 | PO; | |
1183 | } | |
1184 | OP(FILTER_OP_UNARY_MINUS_S64): | |
1185 | { | |
1186 | estack_ax_v = -estack_ax_v; | |
d644d1df | 1187 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
1188 | next_pc += sizeof(struct unary_op); |
1189 | PO; | |
1190 | } | |
1191 | OP(FILTER_OP_UNARY_PLUS_DOUBLE): | |
1192 | OP(FILTER_OP_UNARY_MINUS_DOUBLE): | |
1193 | { | |
1194 | BUG_ON(1); | |
1195 | PO; | |
1196 | } | |
1197 | OP(FILTER_OP_UNARY_NOT_S64): | |
1198 | { | |
1199 | estack_ax_v = !estack_ax_v; | |
d644d1df | 1200 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
1201 | next_pc += sizeof(struct unary_op); |
1202 | PO; | |
1203 | } | |
1204 | OP(FILTER_OP_UNARY_NOT_DOUBLE): | |
1205 | { | |
1206 | BUG_ON(1); | |
1207 | PO; | |
1208 | } | |
1209 | ||
1210 | /* logical */ | |
1211 | OP(FILTER_OP_AND): | |
1212 | { | |
1213 | struct logical_op *insn = (struct logical_op *) pc; | |
1214 | ||
1215 | /* If AX is 0, skip and evaluate to 0 */ | |
1216 | if (unlikely(estack_ax_v == 0)) { | |
1217 | dbg_printk("Jumping to bytecode offset %u\n", | |
1218 | (unsigned int) insn->skip_offset); | |
1219 | next_pc = start_pc + insn->skip_offset; | |
1220 | } else { | |
1221 | /* Pop 1 when jump not taken */ | |
d644d1df | 1222 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 MD |
1223 | next_pc += sizeof(struct logical_op); |
1224 | } | |
1225 | PO; | |
1226 | } | |
1227 | OP(FILTER_OP_OR): | |
1228 | { | |
1229 | struct logical_op *insn = (struct logical_op *) pc; | |
1230 | ||
1231 | /* If AX is nonzero, skip and evaluate to 1 */ | |
1232 | ||
1233 | if (unlikely(estack_ax_v != 0)) { | |
1234 | estack_ax_v = 1; | |
1235 | dbg_printk("Jumping to bytecode offset %u\n", | |
1236 | (unsigned int) insn->skip_offset); | |
1237 | next_pc = start_pc + insn->skip_offset; | |
1238 | } else { | |
1239 | /* Pop 1 when jump not taken */ | |
d644d1df | 1240 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 MD |
1241 | next_pc += sizeof(struct logical_op); |
1242 | } | |
1243 | PO; | |
1244 | } | |
1245 | ||
1246 | ||
1247 | /* load field ref */ | |
1248 | OP(FILTER_OP_LOAD_FIELD_REF_STRING): | |
1249 | { | |
1250 | struct load_op *insn = (struct load_op *) pc; | |
1251 | struct field_ref *ref = (struct field_ref *) insn->data; | |
1252 | ||
1253 | dbg_printk("load field ref offset %u type string\n", | |
1254 | ref->offset); | |
d644d1df | 1255 | estack_push(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 1256 | estack_ax(stack, top)->u.s.str = |
03cb0cdd | 1257 | *(const char * const *) &interpreter_stack_data[ref->offset]; |
07dfc1d0 MD |
1258 | if (unlikely(!estack_ax(stack, top)->u.s.str)) { |
1259 | dbg_printk("Filter warning: loading a NULL string.\n"); | |
1260 | ret = -EINVAL; | |
1261 | goto end; | |
1262 | } | |
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_NONE; | |
f127e61e | 1266 | estack_ax(stack, top)->u.s.user = 0; |
d644d1df | 1267 | estack_ax(stack, top)->type = REG_STRING; |
07dfc1d0 MD |
1268 | dbg_printk("ref load string %s\n", estack_ax(stack, top)->u.s.str); |
1269 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
1270 | PO; | |
1271 | } | |
1272 | ||
1273 | OP(FILTER_OP_LOAD_FIELD_REF_SEQUENCE): | |
1274 | { | |
1275 | struct load_op *insn = (struct load_op *) pc; | |
1276 | struct field_ref *ref = (struct field_ref *) insn->data; | |
1277 | ||
1278 | dbg_printk("load field ref offset %u type sequence\n", | |
1279 | ref->offset); | |
d644d1df | 1280 | estack_push(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 1281 | estack_ax(stack, top)->u.s.seq_len = |
03cb0cdd | 1282 | *(unsigned long *) &interpreter_stack_data[ref->offset]; |
07dfc1d0 | 1283 | estack_ax(stack, top)->u.s.str = |
03cb0cdd | 1284 | *(const char **) (&interpreter_stack_data[ref->offset |
07dfc1d0 MD |
1285 | + sizeof(unsigned long)]); |
1286 | if (unlikely(!estack_ax(stack, top)->u.s.str)) { | |
1287 | dbg_printk("Filter warning: loading a NULL sequence.\n"); | |
1288 | ret = -EINVAL; | |
1289 | goto end; | |
1290 | } | |
02aca193 PP |
1291 | estack_ax(stack, top)->u.s.literal_type = |
1292 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
f127e61e | 1293 | estack_ax(stack, top)->u.s.user = 0; |
07dfc1d0 MD |
1294 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); |
1295 | PO; | |
1296 | } | |
1297 | ||
1298 | OP(FILTER_OP_LOAD_FIELD_REF_S64): | |
1299 | { | |
1300 | struct load_op *insn = (struct load_op *) pc; | |
1301 | struct field_ref *ref = (struct field_ref *) insn->data; | |
1302 | ||
1303 | dbg_printk("load field ref offset %u type s64\n", | |
1304 | ref->offset); | |
d644d1df | 1305 | estack_push(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 1306 | estack_ax_v = |
03cb0cdd | 1307 | ((struct literal_numeric *) &interpreter_stack_data[ref->offset])->v; |
d644d1df | 1308 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
1309 | dbg_printk("ref load s64 %lld\n", |
1310 | (long long) estack_ax_v); | |
1311 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
1312 | PO; | |
1313 | } | |
1314 | ||
1315 | OP(FILTER_OP_LOAD_FIELD_REF_DOUBLE): | |
1316 | { | |
1317 | BUG_ON(1); | |
1318 | PO; | |
1319 | } | |
1320 | ||
1321 | /* load from immediate operand */ | |
1322 | OP(FILTER_OP_LOAD_STRING): | |
1323 | { | |
1324 | struct load_op *insn = (struct load_op *) pc; | |
1325 | ||
1326 | dbg_printk("load string %s\n", insn->data); | |
d644d1df | 1327 | estack_push(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 1328 | estack_ax(stack, top)->u.s.str = insn->data; |
cbc19040 | 1329 | estack_ax(stack, top)->u.s.seq_len = LTTNG_SIZE_MAX; |
02aca193 PP |
1330 | estack_ax(stack, top)->u.s.literal_type = |
1331 | ESTACK_STRING_LITERAL_TYPE_PLAIN; | |
1332 | estack_ax(stack, top)->u.s.user = 0; | |
1333 | next_pc += sizeof(struct load_op) + strlen(insn->data) + 1; | |
1334 | PO; | |
1335 | } | |
1336 | ||
1337 | OP(FILTER_OP_LOAD_STAR_GLOB_STRING): | |
1338 | { | |
1339 | struct load_op *insn = (struct load_op *) pc; | |
1340 | ||
1341 | dbg_printk("load globbing pattern %s\n", insn->data); | |
d644d1df | 1342 | estack_push(stack, top, ax, bx, ax_t, bx_t); |
02aca193 | 1343 | estack_ax(stack, top)->u.s.str = insn->data; |
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_STAR_GLOB; | |
f127e61e | 1347 | estack_ax(stack, top)->u.s.user = 0; |
07dfc1d0 MD |
1348 | next_pc += sizeof(struct load_op) + strlen(insn->data) + 1; |
1349 | PO; | |
1350 | } | |
1351 | ||
1352 | OP(FILTER_OP_LOAD_S64): | |
1353 | { | |
1354 | struct load_op *insn = (struct load_op *) pc; | |
1355 | ||
d644d1df | 1356 | estack_push(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 1357 | estack_ax_v = ((struct literal_numeric *) insn->data)->v; |
d644d1df | 1358 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
1359 | dbg_printk("load s64 %lld\n", |
1360 | (long long) estack_ax_v); | |
1361 | next_pc += sizeof(struct load_op) | |
1362 | + sizeof(struct literal_numeric); | |
1363 | PO; | |
1364 | } | |
1365 | ||
1366 | OP(FILTER_OP_LOAD_DOUBLE): | |
1367 | { | |
1368 | BUG_ON(1); | |
1369 | PO; | |
1370 | } | |
1371 | ||
1372 | /* cast */ | |
1373 | OP(FILTER_OP_CAST_TO_S64): | |
5a15f70c | 1374 | printk(KERN_WARNING "LTTng: filter: unsupported non-specialized bytecode op %u\n", |
07dfc1d0 MD |
1375 | (unsigned int) *(filter_opcode_t *) pc); |
1376 | ret = -EINVAL; | |
1377 | goto end; | |
1378 | ||
1379 | OP(FILTER_OP_CAST_DOUBLE_TO_S64): | |
1380 | { | |
1381 | BUG_ON(1); | |
1382 | PO; | |
1383 | } | |
1384 | ||
1385 | OP(FILTER_OP_CAST_NOP): | |
1386 | { | |
1387 | next_pc += sizeof(struct cast_op); | |
1388 | PO; | |
1389 | } | |
1390 | ||
1391 | /* get context ref */ | |
1392 | OP(FILTER_OP_GET_CONTEXT_REF_STRING): | |
1393 | { | |
1394 | struct load_op *insn = (struct load_op *) pc; | |
1395 | struct field_ref *ref = (struct field_ref *) insn->data; | |
1396 | struct lttng_ctx_field *ctx_field; | |
1397 | union lttng_ctx_value v; | |
1398 | ||
1399 | dbg_printk("get context ref offset %u type string\n", | |
1400 | ref->offset); | |
1401 | ctx_field = <tng_static_ctx->fields[ref->offset]; | |
79150a49 | 1402 | ctx_field->get_value(ctx_field, lttng_probe_ctx, &v); |
d644d1df | 1403 | estack_push(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 MD |
1404 | estack_ax(stack, top)->u.s.str = v.str; |
1405 | if (unlikely(!estack_ax(stack, top)->u.s.str)) { | |
1406 | dbg_printk("Filter warning: loading a NULL string.\n"); | |
1407 | ret = -EINVAL; | |
1408 | goto end; | |
1409 | } | |
cbc19040 | 1410 | estack_ax(stack, top)->u.s.seq_len = LTTNG_SIZE_MAX; |
02aca193 PP |
1411 | estack_ax(stack, top)->u.s.literal_type = |
1412 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
f127e61e | 1413 | estack_ax(stack, top)->u.s.user = 0; |
d644d1df | 1414 | estack_ax(stack, top)->type = REG_STRING; |
07dfc1d0 MD |
1415 | dbg_printk("ref get context string %s\n", estack_ax(stack, top)->u.s.str); |
1416 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
1417 | PO; | |
1418 | } | |
1419 | ||
1420 | OP(FILTER_OP_GET_CONTEXT_REF_S64): | |
1421 | { | |
1422 | struct load_op *insn = (struct load_op *) pc; | |
1423 | struct field_ref *ref = (struct field_ref *) insn->data; | |
1424 | struct lttng_ctx_field *ctx_field; | |
1425 | union lttng_ctx_value v; | |
1426 | ||
1427 | dbg_printk("get context ref offset %u type s64\n", | |
1428 | ref->offset); | |
1429 | ctx_field = <tng_static_ctx->fields[ref->offset]; | |
79150a49 | 1430 | ctx_field->get_value(ctx_field, lttng_probe_ctx, &v); |
d644d1df | 1431 | estack_push(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 1432 | estack_ax_v = v.s64; |
d644d1df | 1433 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
1434 | dbg_printk("ref get context s64 %lld\n", |
1435 | (long long) estack_ax_v); | |
1436 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
1437 | PO; | |
1438 | } | |
1439 | ||
1440 | OP(FILTER_OP_GET_CONTEXT_REF_DOUBLE): | |
1441 | { | |
1442 | BUG_ON(1); | |
1443 | PO; | |
1444 | } | |
1445 | ||
f127e61e MD |
1446 | /* load userspace field ref */ |
1447 | OP(FILTER_OP_LOAD_FIELD_REF_USER_STRING): | |
1448 | { | |
1449 | struct load_op *insn = (struct load_op *) pc; | |
1450 | struct field_ref *ref = (struct field_ref *) insn->data; | |
1451 | ||
1452 | dbg_printk("load field ref offset %u type user string\n", | |
1453 | ref->offset); | |
d644d1df | 1454 | estack_push(stack, top, ax, bx, ax_t, bx_t); |
5b4ad89f | 1455 | estack_ax(stack, top)->u.s.user_str = |
03cb0cdd | 1456 | *(const char * const *) &interpreter_stack_data[ref->offset]; |
f127e61e MD |
1457 | if (unlikely(!estack_ax(stack, top)->u.s.str)) { |
1458 | dbg_printk("Filter warning: loading a NULL string.\n"); | |
1459 | ret = -EINVAL; | |
1460 | goto end; | |
1461 | } | |
cbc19040 | 1462 | estack_ax(stack, top)->u.s.seq_len = LTTNG_SIZE_MAX; |
02aca193 PP |
1463 | estack_ax(stack, top)->u.s.literal_type = |
1464 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
f127e61e | 1465 | estack_ax(stack, top)->u.s.user = 1; |
d644d1df | 1466 | estack_ax(stack, top)->type = REG_STRING; |
f127e61e MD |
1467 | dbg_printk("ref load string %s\n", estack_ax(stack, top)->u.s.str); |
1468 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
1469 | PO; | |
1470 | } | |
1471 | ||
1472 | OP(FILTER_OP_LOAD_FIELD_REF_USER_SEQUENCE): | |
1473 | { | |
1474 | struct load_op *insn = (struct load_op *) pc; | |
1475 | struct field_ref *ref = (struct field_ref *) insn->data; | |
1476 | ||
1477 | dbg_printk("load field ref offset %u type user sequence\n", | |
1478 | ref->offset); | |
d644d1df | 1479 | estack_push(stack, top, ax, bx, ax_t, bx_t); |
f127e61e | 1480 | estack_ax(stack, top)->u.s.seq_len = |
03cb0cdd | 1481 | *(unsigned long *) &interpreter_stack_data[ref->offset]; |
5b4ad89f | 1482 | estack_ax(stack, top)->u.s.user_str = |
03cb0cdd | 1483 | *(const char **) (&interpreter_stack_data[ref->offset |
f127e61e MD |
1484 | + sizeof(unsigned long)]); |
1485 | if (unlikely(!estack_ax(stack, top)->u.s.str)) { | |
1486 | dbg_printk("Filter warning: loading a NULL sequence.\n"); | |
1487 | ret = -EINVAL; | |
1488 | goto end; | |
1489 | } | |
02aca193 PP |
1490 | estack_ax(stack, top)->u.s.literal_type = |
1491 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
f127e61e MD |
1492 | estack_ax(stack, top)->u.s.user = 1; |
1493 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
1494 | PO; | |
1495 | } | |
1496 | ||
3834b99f MD |
1497 | OP(FILTER_OP_GET_CONTEXT_ROOT): |
1498 | { | |
1499 | dbg_printk("op get context root\n"); | |
d644d1df | 1500 | estack_push(stack, top, ax, bx, ax_t, bx_t); |
3834b99f MD |
1501 | estack_ax(stack, top)->u.ptr.type = LOAD_ROOT_CONTEXT; |
1502 | /* "field" only needed for variants. */ | |
1503 | estack_ax(stack, top)->u.ptr.field = NULL; | |
d644d1df | 1504 | estack_ax(stack, top)->type = REG_PTR; |
3834b99f MD |
1505 | next_pc += sizeof(struct load_op); |
1506 | PO; | |
1507 | } | |
1508 | ||
1509 | OP(FILTER_OP_GET_APP_CONTEXT_ROOT): | |
1510 | { | |
1511 | BUG_ON(1); | |
1512 | PO; | |
1513 | } | |
1514 | ||
1515 | OP(FILTER_OP_GET_PAYLOAD_ROOT): | |
1516 | { | |
1517 | dbg_printk("op get app payload root\n"); | |
d644d1df | 1518 | estack_push(stack, top, ax, bx, ax_t, bx_t); |
3834b99f | 1519 | estack_ax(stack, top)->u.ptr.type = LOAD_ROOT_PAYLOAD; |
03cb0cdd | 1520 | estack_ax(stack, top)->u.ptr.ptr = interpreter_stack_data; |
3834b99f MD |
1521 | /* "field" only needed for variants. */ |
1522 | estack_ax(stack, top)->u.ptr.field = NULL; | |
d644d1df | 1523 | estack_ax(stack, top)->type = REG_PTR; |
3834b99f MD |
1524 | next_pc += sizeof(struct load_op); |
1525 | PO; | |
1526 | } | |
1527 | ||
1528 | OP(FILTER_OP_GET_SYMBOL): | |
1529 | { | |
1530 | dbg_printk("op get symbol\n"); | |
1531 | switch (estack_ax(stack, top)->u.ptr.type) { | |
1532 | case LOAD_OBJECT: | |
5a15f70c | 1533 | printk(KERN_WARNING "LTTng: filter: Nested fields not implemented yet.\n"); |
3834b99f MD |
1534 | ret = -EINVAL; |
1535 | goto end; | |
1536 | case LOAD_ROOT_CONTEXT: | |
1537 | case LOAD_ROOT_APP_CONTEXT: | |
1538 | case LOAD_ROOT_PAYLOAD: | |
1539 | /* | |
1540 | * symbol lookup is performed by | |
1541 | * specialization. | |
1542 | */ | |
1543 | ret = -EINVAL; | |
1544 | goto end; | |
1545 | } | |
1546 | next_pc += sizeof(struct load_op) + sizeof(struct get_symbol); | |
1547 | PO; | |
1548 | } | |
1549 | ||
1550 | OP(FILTER_OP_GET_SYMBOL_FIELD): | |
1551 | { | |
1552 | /* | |
1553 | * Used for first variant encountered in a | |
1554 | * traversal. Variants are not implemented yet. | |
1555 | */ | |
1556 | ret = -EINVAL; | |
1557 | goto end; | |
1558 | } | |
1559 | ||
1560 | OP(FILTER_OP_GET_INDEX_U16): | |
1561 | { | |
1562 | struct load_op *insn = (struct load_op *) pc; | |
1563 | struct get_index_u16 *index = (struct get_index_u16 *) insn->data; | |
1564 | ||
1565 | dbg_printk("op get index u16\n"); | |
1566 | ret = dynamic_get_index(lttng_probe_ctx, bytecode, index->index, estack_ax(stack, top)); | |
1567 | if (ret) | |
1568 | goto end; | |
1569 | estack_ax_v = estack_ax(stack, top)->u.v; | |
d644d1df | 1570 | estack_ax_t = estack_ax(stack, top)->type; |
3834b99f MD |
1571 | next_pc += sizeof(struct load_op) + sizeof(struct get_index_u16); |
1572 | PO; | |
1573 | } | |
1574 | ||
1575 | OP(FILTER_OP_GET_INDEX_U64): | |
1576 | { | |
1577 | struct load_op *insn = (struct load_op *) pc; | |
1578 | struct get_index_u64 *index = (struct get_index_u64 *) insn->data; | |
1579 | ||
1580 | dbg_printk("op get index u64\n"); | |
1581 | ret = dynamic_get_index(lttng_probe_ctx, bytecode, index->index, estack_ax(stack, top)); | |
1582 | if (ret) | |
1583 | goto end; | |
1584 | estack_ax_v = estack_ax(stack, top)->u.v; | |
d644d1df | 1585 | estack_ax_t = estack_ax(stack, top)->type; |
3834b99f MD |
1586 | next_pc += sizeof(struct load_op) + sizeof(struct get_index_u64); |
1587 | PO; | |
1588 | } | |
1589 | ||
1590 | OP(FILTER_OP_LOAD_FIELD): | |
1591 | { | |
1592 | dbg_printk("op load field\n"); | |
1593 | ret = dynamic_load_field(estack_ax(stack, top)); | |
1594 | if (ret) | |
1595 | goto end; | |
1596 | estack_ax_v = estack_ax(stack, top)->u.v; | |
d644d1df | 1597 | estack_ax_t = estack_ax(stack, top)->type; |
3834b99f MD |
1598 | next_pc += sizeof(struct load_op); |
1599 | PO; | |
1600 | } | |
1601 | ||
1602 | OP(FILTER_OP_LOAD_FIELD_S8): | |
1603 | { | |
1604 | dbg_printk("op load field s8\n"); | |
1605 | ||
1606 | estack_ax_v = *(int8_t *) estack_ax(stack, top)->u.ptr.ptr; | |
d644d1df | 1607 | estack_ax_t = REG_S64; |
3834b99f MD |
1608 | next_pc += sizeof(struct load_op); |
1609 | PO; | |
1610 | } | |
1611 | OP(FILTER_OP_LOAD_FIELD_S16): | |
1612 | { | |
1613 | dbg_printk("op load field s16\n"); | |
1614 | ||
1615 | estack_ax_v = *(int16_t *) estack_ax(stack, top)->u.ptr.ptr; | |
d644d1df | 1616 | estack_ax_t = REG_S64; |
3834b99f MD |
1617 | next_pc += sizeof(struct load_op); |
1618 | PO; | |
1619 | } | |
1620 | OP(FILTER_OP_LOAD_FIELD_S32): | |
1621 | { | |
1622 | dbg_printk("op load field s32\n"); | |
1623 | ||
1624 | estack_ax_v = *(int32_t *) estack_ax(stack, top)->u.ptr.ptr; | |
d644d1df | 1625 | estack_ax_t = REG_S64; |
3834b99f MD |
1626 | next_pc += sizeof(struct load_op); |
1627 | PO; | |
1628 | } | |
1629 | OP(FILTER_OP_LOAD_FIELD_S64): | |
1630 | { | |
1631 | dbg_printk("op load field s64\n"); | |
1632 | ||
1633 | estack_ax_v = *(int64_t *) estack_ax(stack, top)->u.ptr.ptr; | |
d644d1df | 1634 | estack_ax_t = REG_S64; |
3834b99f MD |
1635 | next_pc += sizeof(struct load_op); |
1636 | PO; | |
1637 | } | |
1638 | OP(FILTER_OP_LOAD_FIELD_U8): | |
1639 | { | |
1640 | dbg_printk("op load field u8\n"); | |
1641 | ||
1642 | estack_ax_v = *(uint8_t *) estack_ax(stack, top)->u.ptr.ptr; | |
d644d1df | 1643 | estack_ax_t = REG_S64; |
3834b99f MD |
1644 | next_pc += sizeof(struct load_op); |
1645 | PO; | |
1646 | } | |
1647 | OP(FILTER_OP_LOAD_FIELD_U16): | |
1648 | { | |
1649 | dbg_printk("op load field u16\n"); | |
1650 | ||
1651 | estack_ax_v = *(uint16_t *) estack_ax(stack, top)->u.ptr.ptr; | |
d644d1df | 1652 | estack_ax_t = REG_S64; |
3834b99f MD |
1653 | next_pc += sizeof(struct load_op); |
1654 | PO; | |
1655 | } | |
1656 | OP(FILTER_OP_LOAD_FIELD_U32): | |
1657 | { | |
1658 | dbg_printk("op load field u32\n"); | |
1659 | ||
1660 | estack_ax_v = *(uint32_t *) estack_ax(stack, top)->u.ptr.ptr; | |
d644d1df | 1661 | estack_ax_t = REG_S64; |
3834b99f MD |
1662 | next_pc += sizeof(struct load_op); |
1663 | PO; | |
1664 | } | |
1665 | OP(FILTER_OP_LOAD_FIELD_U64): | |
1666 | { | |
1667 | dbg_printk("op load field u64\n"); | |
1668 | ||
1669 | estack_ax_v = *(uint64_t *) estack_ax(stack, top)->u.ptr.ptr; | |
d644d1df | 1670 | estack_ax_t = REG_S64; |
3834b99f MD |
1671 | next_pc += sizeof(struct load_op); |
1672 | PO; | |
1673 | } | |
1674 | OP(FILTER_OP_LOAD_FIELD_DOUBLE): | |
1675 | { | |
1676 | ret = -EINVAL; | |
1677 | goto end; | |
1678 | } | |
1679 | ||
1680 | OP(FILTER_OP_LOAD_FIELD_STRING): | |
1681 | { | |
1682 | const char *str; | |
1683 | ||
1684 | dbg_printk("op load field string\n"); | |
1685 | str = (const char *) estack_ax(stack, top)->u.ptr.ptr; | |
1686 | estack_ax(stack, top)->u.s.str = str; | |
1687 | if (unlikely(!estack_ax(stack, top)->u.s.str)) { | |
1688 | dbg_printk("Filter warning: loading a NULL string.\n"); | |
1689 | ret = -EINVAL; | |
1690 | goto end; | |
1691 | } | |
4efe037b | 1692 | estack_ax(stack, top)->u.s.seq_len = LTTNG_SIZE_MAX; |
3834b99f MD |
1693 | estack_ax(stack, top)->u.s.literal_type = |
1694 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
d644d1df | 1695 | estack_ax(stack, top)->type = REG_STRING; |
3834b99f MD |
1696 | next_pc += sizeof(struct load_op); |
1697 | PO; | |
1698 | } | |
1699 | ||
1700 | OP(FILTER_OP_LOAD_FIELD_SEQUENCE): | |
1701 | { | |
1702 | const char *ptr; | |
1703 | ||
1704 | dbg_printk("op load field string sequence\n"); | |
1705 | ptr = estack_ax(stack, top)->u.ptr.ptr; | |
1706 | estack_ax(stack, top)->u.s.seq_len = *(unsigned long *) ptr; | |
1707 | estack_ax(stack, top)->u.s.str = *(const char **) (ptr + sizeof(unsigned long)); | |
1708 | if (unlikely(!estack_ax(stack, top)->u.s.str)) { | |
1709 | dbg_printk("Filter warning: loading a NULL sequence.\n"); | |
1710 | ret = -EINVAL; | |
1711 | goto end; | |
1712 | } | |
1713 | estack_ax(stack, top)->u.s.literal_type = | |
1714 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
d644d1df | 1715 | estack_ax(stack, top)->type = REG_STRING; |
3834b99f MD |
1716 | next_pc += sizeof(struct load_op); |
1717 | PO; | |
1718 | } | |
1719 | ||
07dfc1d0 MD |
1720 | END_OP |
1721 | end: | |
a93d4e71 | 1722 | /* Return _DISCARD on error. */ |
07dfc1d0 | 1723 | if (ret) |
a93d4e71 | 1724 | return LTTNG_FILTER_DISCARD; |
03cb0cdd FD |
1725 | |
1726 | if (output) { | |
1727 | return lttng_bytecode_interpret_format_output( | |
1728 | estack_ax(stack, top), output); | |
1729 | } | |
1730 | ||
07dfc1d0 MD |
1731 | return retval; |
1732 | } | |
03cb0cdd FD |
1733 | LTTNG_STACK_FRAME_NON_STANDARD(bytecode_interpret); |
1734 | ||
1735 | uint64_t lttng_filter_interpret_bytecode(void *filter_data, | |
1736 | struct lttng_probe_ctx *lttng_probe_ctx, | |
1737 | const char *filter_stack_data) | |
1738 | { | |
1739 | return bytecode_interpret(filter_data, lttng_probe_ctx, | |
1740 | filter_stack_data, NULL); | |
1741 | } | |
07dfc1d0 MD |
1742 | |
1743 | #undef START_OP | |
1744 | #undef OP | |
1745 | #undef PO | |
1746 | #undef END_OP |