Commit | Line | Data |
---|---|---|
9f36eaed MJ |
1 | /* SPDX-License-Identifier: MIT |
2 | * | |
07dfc1d0 MD |
3 | * lttng-filter-specialize.c |
4 | * | |
5 | * LTTng modules filter code specializer. | |
6 | * | |
bbf3aef5 | 7 | * Copyright (C) 2010-2016 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
07dfc1d0 MD |
8 | */ |
9 | ||
3834b99f | 10 | #include <linux/slab.h> |
241ae9a8 | 11 | #include <lttng-filter.h> |
3834b99f | 12 | #include "lib/align.h" |
07dfc1d0 | 13 | |
1d00109f MJ |
14 | #include <wrapper/compiler_attributes.h> |
15 | ||
3834b99f MD |
16 | static ssize_t bytecode_reserve_data(struct bytecode_runtime *runtime, |
17 | size_t align, size_t len) | |
18 | { | |
19 | ssize_t ret; | |
20 | size_t padding = offset_align(runtime->data_len, align); | |
21 | size_t new_len = runtime->data_len + padding + len; | |
22 | size_t new_alloc_len = new_len; | |
23 | size_t old_alloc_len = runtime->data_alloc_len; | |
24 | ||
25 | if (new_len > FILTER_MAX_DATA_LEN) | |
26 | return -EINVAL; | |
27 | ||
28 | if (new_alloc_len > old_alloc_len) { | |
29 | char *newptr; | |
30 | ||
31 | new_alloc_len = | |
32 | max_t(size_t, 1U << get_count_order(new_alloc_len), old_alloc_len << 1); | |
33 | newptr = krealloc(runtime->data, new_alloc_len, GFP_KERNEL); | |
34 | if (!newptr) | |
35 | return -ENOMEM; | |
36 | runtime->data = newptr; | |
37 | /* We zero directly the memory from start of allocation. */ | |
38 | memset(&runtime->data[old_alloc_len], 0, new_alloc_len - old_alloc_len); | |
39 | runtime->data_alloc_len = new_alloc_len; | |
40 | } | |
41 | runtime->data_len += padding; | |
42 | ret = runtime->data_len; | |
43 | runtime->data_len += len; | |
44 | return ret; | |
45 | } | |
46 | ||
47 | static ssize_t bytecode_push_data(struct bytecode_runtime *runtime, | |
48 | const void *p, size_t align, size_t len) | |
49 | { | |
50 | ssize_t offset; | |
51 | ||
52 | offset = bytecode_reserve_data(runtime, align, len); | |
53 | if (offset < 0) | |
54 | return -ENOMEM; | |
55 | memcpy(&runtime->data[offset], p, len); | |
56 | return offset; | |
57 | } | |
58 | ||
59 | static int specialize_load_field(struct vstack_entry *stack_top, | |
60 | struct load_op *insn) | |
61 | { | |
62 | int ret; | |
63 | ||
64 | switch (stack_top->load.type) { | |
65 | case LOAD_OBJECT: | |
66 | break; | |
67 | case LOAD_ROOT_CONTEXT: | |
68 | case LOAD_ROOT_APP_CONTEXT: | |
69 | case LOAD_ROOT_PAYLOAD: | |
70 | default: | |
71 | dbg_printk("Filter warning: cannot load root, missing field name.\n"); | |
72 | ret = -EINVAL; | |
73 | goto end; | |
74 | } | |
75 | switch (stack_top->load.object_type) { | |
76 | case OBJECT_TYPE_S8: | |
77 | dbg_printk("op load field s8\n"); | |
78 | stack_top->type = REG_S64; | |
79 | if (!stack_top->load.rev_bo) | |
80 | insn->op = FILTER_OP_LOAD_FIELD_S8; | |
81 | break; | |
82 | case OBJECT_TYPE_S16: | |
83 | dbg_printk("op load field s16\n"); | |
84 | stack_top->type = REG_S64; | |
85 | if (!stack_top->load.rev_bo) | |
86 | insn->op = FILTER_OP_LOAD_FIELD_S16; | |
87 | break; | |
88 | case OBJECT_TYPE_S32: | |
89 | dbg_printk("op load field s32\n"); | |
90 | stack_top->type = REG_S64; | |
91 | if (!stack_top->load.rev_bo) | |
92 | insn->op = FILTER_OP_LOAD_FIELD_S32; | |
93 | break; | |
94 | case OBJECT_TYPE_S64: | |
95 | dbg_printk("op load field s64\n"); | |
96 | stack_top->type = REG_S64; | |
97 | if (!stack_top->load.rev_bo) | |
98 | insn->op = FILTER_OP_LOAD_FIELD_S64; | |
99 | break; | |
100 | case OBJECT_TYPE_U8: | |
101 | dbg_printk("op load field u8\n"); | |
102 | stack_top->type = REG_S64; | |
103 | insn->op = FILTER_OP_LOAD_FIELD_U8; | |
104 | break; | |
105 | case OBJECT_TYPE_U16: | |
106 | dbg_printk("op load field u16\n"); | |
107 | stack_top->type = REG_S64; | |
108 | if (!stack_top->load.rev_bo) | |
109 | insn->op = FILTER_OP_LOAD_FIELD_U16; | |
110 | break; | |
111 | case OBJECT_TYPE_U32: | |
112 | dbg_printk("op load field u32\n"); | |
113 | stack_top->type = REG_S64; | |
114 | if (!stack_top->load.rev_bo) | |
115 | insn->op = FILTER_OP_LOAD_FIELD_U32; | |
116 | break; | |
117 | case OBJECT_TYPE_U64: | |
118 | dbg_printk("op load field u64\n"); | |
119 | stack_top->type = REG_S64; | |
120 | if (!stack_top->load.rev_bo) | |
121 | insn->op = FILTER_OP_LOAD_FIELD_U64; | |
122 | break; | |
123 | case OBJECT_TYPE_DOUBLE: | |
124 | printk(KERN_WARNING "Double type unsupported\n\n"); | |
125 | ret = -EINVAL; | |
126 | goto end; | |
127 | case OBJECT_TYPE_STRING: | |
128 | dbg_printk("op load field string\n"); | |
129 | stack_top->type = REG_STRING; | |
130 | insn->op = FILTER_OP_LOAD_FIELD_STRING; | |
131 | break; | |
132 | case OBJECT_TYPE_STRING_SEQUENCE: | |
133 | dbg_printk("op load field string sequence\n"); | |
134 | stack_top->type = REG_STRING; | |
135 | insn->op = FILTER_OP_LOAD_FIELD_SEQUENCE; | |
136 | break; | |
137 | case OBJECT_TYPE_DYNAMIC: | |
138 | ret = -EINVAL; | |
139 | goto end; | |
140 | case OBJECT_TYPE_SEQUENCE: | |
141 | case OBJECT_TYPE_ARRAY: | |
142 | case OBJECT_TYPE_STRUCT: | |
143 | case OBJECT_TYPE_VARIANT: | |
144 | printk(KERN_WARNING "Sequences, arrays, struct and variant cannot be loaded (nested types).\n"); | |
145 | ret = -EINVAL; | |
146 | goto end; | |
147 | } | |
148 | return 0; | |
149 | ||
150 | end: | |
151 | return ret; | |
152 | } | |
153 | ||
154 | static int specialize_get_index_object_type(enum object_type *otype, | |
155 | int signedness, uint32_t elem_len) | |
156 | { | |
157 | switch (elem_len) { | |
158 | case 8: | |
159 | if (signedness) | |
160 | *otype = OBJECT_TYPE_S8; | |
161 | else | |
162 | *otype = OBJECT_TYPE_U8; | |
163 | break; | |
164 | case 16: | |
165 | if (signedness) | |
166 | *otype = OBJECT_TYPE_S16; | |
167 | else | |
168 | *otype = OBJECT_TYPE_U16; | |
169 | break; | |
170 | case 32: | |
171 | if (signedness) | |
172 | *otype = OBJECT_TYPE_S32; | |
173 | else | |
174 | *otype = OBJECT_TYPE_U32; | |
175 | break; | |
176 | case 64: | |
177 | if (signedness) | |
178 | *otype = OBJECT_TYPE_S64; | |
179 | else | |
180 | *otype = OBJECT_TYPE_U64; | |
181 | break; | |
182 | default: | |
183 | return -EINVAL; | |
184 | } | |
185 | return 0; | |
186 | } | |
187 | ||
188 | static int specialize_get_index(struct bytecode_runtime *runtime, | |
189 | struct load_op *insn, uint64_t index, | |
190 | struct vstack_entry *stack_top, | |
191 | int idx_len) | |
192 | { | |
193 | int ret; | |
194 | struct filter_get_index_data gid; | |
195 | ssize_t data_offset; | |
196 | ||
197 | memset(&gid, 0, sizeof(gid)); | |
198 | switch (stack_top->load.type) { | |
199 | case LOAD_OBJECT: | |
200 | switch (stack_top->load.object_type) { | |
201 | case OBJECT_TYPE_ARRAY: | |
202 | { | |
203 | const struct lttng_event_field *field; | |
204 | uint32_t elem_len, num_elems; | |
205 | int signedness; | |
206 | ||
207 | field = stack_top->load.field; | |
208 | elem_len = field->type.u.array.elem_type.u.basic.integer.size; | |
209 | signedness = field->type.u.array.elem_type.u.basic.integer.signedness; | |
210 | num_elems = field->type.u.array.length; | |
211 | if (index >= num_elems) { | |
212 | ret = -EINVAL; | |
213 | goto end; | |
214 | } | |
215 | ret = specialize_get_index_object_type(&stack_top->load.object_type, | |
216 | signedness, elem_len); | |
217 | if (ret) | |
218 | goto end; | |
219 | gid.offset = index * (elem_len / CHAR_BIT); | |
220 | gid.array_len = num_elems * (elem_len / CHAR_BIT); | |
221 | gid.elem.type = stack_top->load.object_type; | |
222 | gid.elem.len = elem_len; | |
223 | if (field->type.u.array.elem_type.u.basic.integer.reverse_byte_order) | |
224 | gid.elem.rev_bo = true; | |
225 | stack_top->load.rev_bo = gid.elem.rev_bo; | |
226 | break; | |
227 | } | |
228 | case OBJECT_TYPE_SEQUENCE: | |
229 | { | |
230 | const struct lttng_event_field *field; | |
231 | uint32_t elem_len; | |
232 | int signedness; | |
233 | ||
234 | field = stack_top->load.field; | |
235 | elem_len = field->type.u.sequence.elem_type.u.basic.integer.size; | |
236 | signedness = field->type.u.sequence.elem_type.u.basic.integer.signedness; | |
237 | ret = specialize_get_index_object_type(&stack_top->load.object_type, | |
238 | signedness, elem_len); | |
239 | if (ret) | |
240 | goto end; | |
241 | gid.offset = index * (elem_len / CHAR_BIT); | |
242 | gid.elem.type = stack_top->load.object_type; | |
243 | gid.elem.len = elem_len; | |
244 | if (field->type.u.sequence.elem_type.u.basic.integer.reverse_byte_order) | |
245 | gid.elem.rev_bo = true; | |
246 | stack_top->load.rev_bo = gid.elem.rev_bo; | |
247 | break; | |
248 | } | |
249 | case OBJECT_TYPE_STRUCT: | |
250 | /* Only generated by the specialize phase. */ | |
1d00109f MJ |
251 | case OBJECT_TYPE_VARIANT: |
252 | lttng_fallthrough; | |
3834b99f MD |
253 | default: |
254 | printk(KERN_WARNING "Unexpected get index type %d", | |
255 | (int) stack_top->load.object_type); | |
256 | ret = -EINVAL; | |
257 | goto end; | |
258 | } | |
259 | break; | |
260 | case LOAD_ROOT_CONTEXT: | |
261 | case LOAD_ROOT_APP_CONTEXT: | |
262 | case LOAD_ROOT_PAYLOAD: | |
263 | printk(KERN_WARNING "Index lookup for root field not implemented yet.\n"); | |
264 | ret = -EINVAL; | |
265 | goto end; | |
266 | } | |
267 | data_offset = bytecode_push_data(runtime, &gid, | |
268 | __alignof__(gid), sizeof(gid)); | |
269 | if (data_offset < 0) { | |
270 | ret = -EINVAL; | |
271 | goto end; | |
272 | } | |
273 | switch (idx_len) { | |
274 | case 2: | |
275 | ((struct get_index_u16 *) insn->data)->index = data_offset; | |
276 | break; | |
277 | case 8: | |
278 | ((struct get_index_u64 *) insn->data)->index = data_offset; | |
279 | break; | |
280 | default: | |
281 | ret = -EINVAL; | |
282 | goto end; | |
283 | } | |
284 | ||
285 | return 0; | |
286 | ||
287 | end: | |
288 | return ret; | |
289 | } | |
290 | ||
291 | static int specialize_context_lookup_name(struct bytecode_runtime *bytecode, | |
292 | struct load_op *insn) | |
293 | { | |
294 | uint16_t offset; | |
295 | const char *name; | |
296 | ||
297 | offset = ((struct get_symbol *) insn->data)->offset; | |
298 | name = bytecode->p.bc->bc.data + bytecode->p.bc->bc.reloc_offset + offset; | |
299 | return lttng_get_context_index(lttng_static_ctx, name); | |
300 | } | |
301 | ||
302 | static int specialize_load_object(const struct lttng_event_field *field, | |
303 | struct vstack_load *load, bool is_context) | |
304 | { | |
305 | load->type = LOAD_OBJECT; | |
306 | /* | |
307 | * LTTng-UST layout all integer fields as s64 on the stack for the filter. | |
308 | */ | |
309 | switch (field->type.atype) { | |
310 | case atype_integer: | |
311 | if (field->type.u.basic.integer.signedness) | |
312 | load->object_type = OBJECT_TYPE_S64; | |
313 | else | |
314 | load->object_type = OBJECT_TYPE_U64; | |
315 | load->rev_bo = false; | |
316 | break; | |
317 | case atype_enum: | |
318 | { | |
319 | const struct lttng_integer_type *itype = | |
320 | &field->type.u.basic.enumeration.container_type; | |
321 | ||
322 | if (itype->signedness) | |
323 | load->object_type = OBJECT_TYPE_S64; | |
324 | else | |
325 | load->object_type = OBJECT_TYPE_U64; | |
326 | load->rev_bo = false; | |
327 | break; | |
328 | } | |
329 | case atype_array: | |
330 | if (field->type.u.array.elem_type.atype != atype_integer) { | |
331 | printk(KERN_WARNING "Array nesting only supports integer types.\n"); | |
332 | return -EINVAL; | |
333 | } | |
334 | if (is_context) { | |
335 | load->object_type = OBJECT_TYPE_STRING; | |
336 | } else { | |
337 | if (field->type.u.array.elem_type.u.basic.integer.encoding == lttng_encode_none) { | |
338 | load->object_type = OBJECT_TYPE_ARRAY; | |
339 | load->field = field; | |
340 | } else { | |
341 | load->object_type = OBJECT_TYPE_STRING_SEQUENCE; | |
342 | } | |
343 | } | |
344 | break; | |
345 | case atype_sequence: | |
346 | if (field->type.u.sequence.elem_type.atype != atype_integer) { | |
347 | printk(KERN_WARNING "Sequence nesting only supports integer types.\n"); | |
348 | return -EINVAL; | |
349 | } | |
350 | if (is_context) { | |
351 | load->object_type = OBJECT_TYPE_STRING; | |
352 | } else { | |
353 | if (field->type.u.sequence.elem_type.u.basic.integer.encoding == lttng_encode_none) { | |
354 | load->object_type = OBJECT_TYPE_SEQUENCE; | |
355 | load->field = field; | |
356 | } else { | |
357 | load->object_type = OBJECT_TYPE_STRING_SEQUENCE; | |
358 | } | |
359 | } | |
360 | break; | |
361 | case atype_array_bitfield: | |
362 | printk(KERN_WARNING "Bitfield array type is not supported.\n"); | |
363 | return -EINVAL; | |
364 | case atype_sequence_bitfield: | |
365 | printk(KERN_WARNING "Bitfield sequence type is not supported.\n"); | |
366 | return -EINVAL; | |
367 | case atype_string: | |
368 | load->object_type = OBJECT_TYPE_STRING; | |
369 | break; | |
370 | case atype_struct: | |
371 | printk(KERN_WARNING "Structure type cannot be loaded.\n"); | |
372 | return -EINVAL; | |
373 | default: | |
374 | printk(KERN_WARNING "Unknown type: %d", (int) field->type.atype); | |
375 | return -EINVAL; | |
376 | } | |
377 | return 0; | |
378 | } | |
379 | ||
380 | static int specialize_context_lookup(struct bytecode_runtime *runtime, | |
381 | struct load_op *insn, | |
382 | struct vstack_load *load) | |
383 | { | |
384 | int idx, ret; | |
385 | struct lttng_ctx_field *ctx_field; | |
386 | struct lttng_event_field *field; | |
387 | struct filter_get_index_data gid; | |
388 | ssize_t data_offset; | |
389 | ||
390 | idx = specialize_context_lookup_name(runtime, insn); | |
391 | if (idx < 0) { | |
392 | return -ENOENT; | |
393 | } | |
394 | ctx_field = <tng_static_ctx->fields[idx]; | |
395 | field = &ctx_field->event_field; | |
396 | ret = specialize_load_object(field, load, true); | |
397 | if (ret) | |
398 | return ret; | |
399 | /* Specialize each get_symbol into a get_index. */ | |
400 | insn->op = FILTER_OP_GET_INDEX_U16; | |
401 | memset(&gid, 0, sizeof(gid)); | |
402 | gid.ctx_index = idx; | |
403 | gid.elem.type = load->object_type; | |
31afaf8b | 404 | gid.elem.rev_bo = load->rev_bo; |
3834b99f MD |
405 | data_offset = bytecode_push_data(runtime, &gid, |
406 | __alignof__(gid), sizeof(gid)); | |
407 | if (data_offset < 0) { | |
408 | return -EINVAL; | |
409 | } | |
410 | ((struct get_index_u16 *) insn->data)->index = data_offset; | |
411 | return 0; | |
412 | } | |
413 | ||
414 | static int specialize_event_payload_lookup(struct lttng_event *event, | |
415 | struct bytecode_runtime *runtime, | |
416 | struct load_op *insn, | |
417 | struct vstack_load *load) | |
418 | { | |
419 | const char *name; | |
420 | uint16_t offset; | |
421 | const struct lttng_event_desc *desc = event->desc; | |
422 | unsigned int i, nr_fields; | |
423 | bool found = false; | |
424 | uint32_t field_offset = 0; | |
425 | const struct lttng_event_field *field; | |
426 | int ret; | |
427 | struct filter_get_index_data gid; | |
428 | ssize_t data_offset; | |
429 | ||
430 | nr_fields = desc->nr_fields; | |
431 | offset = ((struct get_symbol *) insn->data)->offset; | |
432 | name = runtime->p.bc->bc.data + runtime->p.bc->bc.reloc_offset + offset; | |
433 | for (i = 0; i < nr_fields; i++) { | |
434 | field = &desc->fields[i]; | |
435 | if (!strcmp(field->name, name)) { | |
436 | found = true; | |
437 | break; | |
438 | } | |
439 | /* compute field offset on stack */ | |
440 | switch (field->type.atype) { | |
441 | case atype_integer: | |
442 | case atype_enum: | |
443 | field_offset += sizeof(int64_t); | |
444 | break; | |
445 | case atype_array: | |
446 | case atype_sequence: | |
447 | case atype_array_bitfield: | |
448 | case atype_sequence_bitfield: | |
449 | field_offset += sizeof(unsigned long); | |
450 | field_offset += sizeof(void *); | |
451 | break; | |
452 | case atype_string: | |
453 | field_offset += sizeof(void *); | |
454 | break; | |
455 | default: | |
456 | ret = -EINVAL; | |
457 | goto end; | |
458 | } | |
459 | } | |
460 | if (!found) { | |
461 | ret = -EINVAL; | |
462 | goto end; | |
463 | } | |
464 | ||
465 | ret = specialize_load_object(field, load, false); | |
466 | if (ret) | |
467 | goto end; | |
468 | ||
469 | /* Specialize each get_symbol into a get_index. */ | |
470 | insn->op = FILTER_OP_GET_INDEX_U16; | |
471 | memset(&gid, 0, sizeof(gid)); | |
472 | gid.offset = field_offset; | |
473 | gid.elem.type = load->object_type; | |
31afaf8b | 474 | gid.elem.rev_bo = load->rev_bo; |
3834b99f MD |
475 | data_offset = bytecode_push_data(runtime, &gid, |
476 | __alignof__(gid), sizeof(gid)); | |
477 | if (data_offset < 0) { | |
478 | ret = -EINVAL; | |
479 | goto end; | |
480 | } | |
481 | ((struct get_index_u16 *) insn->data)->index = data_offset; | |
482 | ret = 0; | |
483 | end: | |
484 | return ret; | |
485 | } | |
486 | ||
487 | int lttng_filter_specialize_bytecode(struct lttng_event *event, | |
488 | struct bytecode_runtime *bytecode) | |
07dfc1d0 MD |
489 | { |
490 | void *pc, *next_pc, *start_pc; | |
491 | int ret = -EINVAL; | |
492 | struct vstack _stack; | |
493 | struct vstack *stack = &_stack; | |
494 | ||
495 | vstack_init(stack); | |
496 | ||
3834b99f | 497 | start_pc = &bytecode->code[0]; |
07dfc1d0 MD |
498 | for (pc = next_pc = start_pc; pc - start_pc < bytecode->len; |
499 | pc = next_pc) { | |
500 | switch (*(filter_opcode_t *) pc) { | |
501 | case FILTER_OP_UNKNOWN: | |
502 | default: | |
503 | printk(KERN_WARNING "unknown bytecode op %u\n", | |
504 | (unsigned int) *(filter_opcode_t *) pc); | |
505 | ret = -EINVAL; | |
506 | goto end; | |
507 | ||
508 | case FILTER_OP_RETURN: | |
57ba4b41 | 509 | case FILTER_OP_RETURN_S64: |
07dfc1d0 MD |
510 | ret = 0; |
511 | goto end; | |
512 | ||
513 | /* binary */ | |
514 | case FILTER_OP_MUL: | |
515 | case FILTER_OP_DIV: | |
516 | case FILTER_OP_MOD: | |
517 | case FILTER_OP_PLUS: | |
518 | case FILTER_OP_MINUS: | |
07dfc1d0 MD |
519 | printk(KERN_WARNING "unsupported bytecode op %u\n", |
520 | (unsigned int) *(filter_opcode_t *) pc); | |
521 | ret = -EINVAL; | |
522 | goto end; | |
523 | ||
524 | case FILTER_OP_EQ: | |
525 | { | |
526 | struct binary_op *insn = (struct binary_op *) pc; | |
527 | ||
528 | switch(vstack_ax(stack)->type) { | |
529 | default: | |
530 | printk(KERN_WARNING "unknown register type\n"); | |
531 | ret = -EINVAL; | |
532 | goto end; | |
533 | ||
534 | case REG_STRING: | |
02aca193 PP |
535 | if (vstack_bx(stack)->type == REG_STAR_GLOB_STRING) |
536 | insn->op = FILTER_OP_EQ_STAR_GLOB_STRING; | |
537 | else | |
538 | insn->op = FILTER_OP_EQ_STRING; | |
539 | break; | |
540 | case REG_STAR_GLOB_STRING: | |
541 | insn->op = FILTER_OP_EQ_STAR_GLOB_STRING; | |
07dfc1d0 MD |
542 | break; |
543 | case REG_S64: | |
544 | if (vstack_bx(stack)->type == REG_S64) | |
545 | insn->op = FILTER_OP_EQ_S64; | |
546 | else | |
547 | insn->op = FILTER_OP_EQ_DOUBLE_S64; | |
548 | break; | |
549 | case REG_DOUBLE: | |
550 | if (vstack_bx(stack)->type == REG_S64) | |
551 | insn->op = FILTER_OP_EQ_S64_DOUBLE; | |
552 | else | |
553 | insn->op = FILTER_OP_EQ_DOUBLE; | |
554 | break; | |
555 | } | |
556 | /* Pop 2, push 1 */ | |
557 | if (vstack_pop(stack)) { | |
558 | ret = -EINVAL; | |
559 | goto end; | |
560 | } | |
561 | vstack_ax(stack)->type = REG_S64; | |
562 | next_pc += sizeof(struct binary_op); | |
563 | break; | |
564 | } | |
565 | ||
566 | case FILTER_OP_NE: | |
567 | { | |
568 | struct binary_op *insn = (struct binary_op *) pc; | |
569 | ||
570 | switch(vstack_ax(stack)->type) { | |
571 | default: | |
572 | printk(KERN_WARNING "unknown register type\n"); | |
573 | ret = -EINVAL; | |
574 | goto end; | |
575 | ||
576 | case REG_STRING: | |
02aca193 PP |
577 | if (vstack_bx(stack)->type == REG_STAR_GLOB_STRING) |
578 | insn->op = FILTER_OP_NE_STAR_GLOB_STRING; | |
579 | else | |
580 | insn->op = FILTER_OP_NE_STRING; | |
581 | break; | |
582 | case REG_STAR_GLOB_STRING: | |
583 | insn->op = FILTER_OP_NE_STAR_GLOB_STRING; | |
07dfc1d0 MD |
584 | break; |
585 | case REG_S64: | |
586 | if (vstack_bx(stack)->type == REG_S64) | |
587 | insn->op = FILTER_OP_NE_S64; | |
588 | else | |
589 | insn->op = FILTER_OP_NE_DOUBLE_S64; | |
590 | break; | |
591 | case REG_DOUBLE: | |
592 | if (vstack_bx(stack)->type == REG_S64) | |
593 | insn->op = FILTER_OP_NE_S64_DOUBLE; | |
594 | else | |
595 | insn->op = FILTER_OP_NE_DOUBLE; | |
596 | break; | |
597 | } | |
598 | /* Pop 2, push 1 */ | |
599 | if (vstack_pop(stack)) { | |
600 | ret = -EINVAL; | |
601 | goto end; | |
602 | } | |
603 | vstack_ax(stack)->type = REG_S64; | |
604 | next_pc += sizeof(struct binary_op); | |
605 | break; | |
606 | } | |
607 | ||
608 | case FILTER_OP_GT: | |
609 | { | |
610 | struct binary_op *insn = (struct binary_op *) pc; | |
611 | ||
612 | switch(vstack_ax(stack)->type) { | |
613 | default: | |
614 | printk(KERN_WARNING "unknown register type\n"); | |
615 | ret = -EINVAL; | |
616 | goto end; | |
617 | ||
02aca193 PP |
618 | case REG_STAR_GLOB_STRING: |
619 | printk(KERN_WARNING "invalid register type for > binary operator\n"); | |
620 | ret = -EINVAL; | |
621 | goto end; | |
07dfc1d0 MD |
622 | case REG_STRING: |
623 | insn->op = FILTER_OP_GT_STRING; | |
624 | break; | |
625 | case REG_S64: | |
626 | if (vstack_bx(stack)->type == REG_S64) | |
627 | insn->op = FILTER_OP_GT_S64; | |
628 | else | |
629 | insn->op = FILTER_OP_GT_DOUBLE_S64; | |
630 | break; | |
631 | case REG_DOUBLE: | |
632 | if (vstack_bx(stack)->type == REG_S64) | |
633 | insn->op = FILTER_OP_GT_S64_DOUBLE; | |
634 | else | |
635 | insn->op = FILTER_OP_GT_DOUBLE; | |
636 | break; | |
637 | } | |
638 | /* Pop 2, push 1 */ | |
639 | if (vstack_pop(stack)) { | |
640 | ret = -EINVAL; | |
641 | goto end; | |
642 | } | |
643 | vstack_ax(stack)->type = REG_S64; | |
644 | next_pc += sizeof(struct binary_op); | |
645 | break; | |
646 | } | |
647 | ||
648 | case FILTER_OP_LT: | |
649 | { | |
650 | struct binary_op *insn = (struct binary_op *) pc; | |
651 | ||
652 | switch(vstack_ax(stack)->type) { | |
653 | default: | |
654 | printk(KERN_WARNING "unknown register type\n"); | |
655 | ret = -EINVAL; | |
656 | goto end; | |
657 | ||
02aca193 PP |
658 | case REG_STAR_GLOB_STRING: |
659 | printk(KERN_WARNING "invalid register type for < binary operator\n"); | |
660 | ret = -EINVAL; | |
661 | goto end; | |
07dfc1d0 MD |
662 | case REG_STRING: |
663 | insn->op = FILTER_OP_LT_STRING; | |
664 | break; | |
665 | case REG_S64: | |
666 | if (vstack_bx(stack)->type == REG_S64) | |
667 | insn->op = FILTER_OP_LT_S64; | |
668 | else | |
669 | insn->op = FILTER_OP_LT_DOUBLE_S64; | |
670 | break; | |
671 | case REG_DOUBLE: | |
672 | if (vstack_bx(stack)->type == REG_S64) | |
673 | insn->op = FILTER_OP_LT_S64_DOUBLE; | |
674 | else | |
675 | insn->op = FILTER_OP_LT_DOUBLE; | |
676 | break; | |
677 | } | |
678 | /* Pop 2, push 1 */ | |
679 | if (vstack_pop(stack)) { | |
680 | ret = -EINVAL; | |
681 | goto end; | |
682 | } | |
683 | vstack_ax(stack)->type = REG_S64; | |
684 | next_pc += sizeof(struct binary_op); | |
685 | break; | |
686 | } | |
687 | ||
688 | case FILTER_OP_GE: | |
689 | { | |
690 | struct binary_op *insn = (struct binary_op *) pc; | |
691 | ||
692 | switch(vstack_ax(stack)->type) { | |
693 | default: | |
694 | printk(KERN_WARNING "unknown register type\n"); | |
695 | ret = -EINVAL; | |
696 | goto end; | |
697 | ||
02aca193 PP |
698 | case REG_STAR_GLOB_STRING: |
699 | printk(KERN_WARNING "invalid register type for >= binary operator\n"); | |
700 | ret = -EINVAL; | |
701 | goto end; | |
07dfc1d0 MD |
702 | case REG_STRING: |
703 | insn->op = FILTER_OP_GE_STRING; | |
704 | break; | |
705 | case REG_S64: | |
706 | if (vstack_bx(stack)->type == REG_S64) | |
707 | insn->op = FILTER_OP_GE_S64; | |
708 | else | |
709 | insn->op = FILTER_OP_GE_DOUBLE_S64; | |
710 | break; | |
711 | case REG_DOUBLE: | |
712 | if (vstack_bx(stack)->type == REG_S64) | |
713 | insn->op = FILTER_OP_GE_S64_DOUBLE; | |
714 | else | |
715 | insn->op = FILTER_OP_GE_DOUBLE; | |
716 | break; | |
717 | } | |
718 | /* Pop 2, push 1 */ | |
719 | if (vstack_pop(stack)) { | |
720 | ret = -EINVAL; | |
721 | goto end; | |
722 | } | |
723 | vstack_ax(stack)->type = REG_S64; | |
724 | next_pc += sizeof(struct binary_op); | |
725 | break; | |
726 | } | |
727 | case FILTER_OP_LE: | |
728 | { | |
729 | struct binary_op *insn = (struct binary_op *) pc; | |
730 | ||
731 | switch(vstack_ax(stack)->type) { | |
732 | default: | |
733 | printk(KERN_WARNING "unknown register type\n"); | |
734 | ret = -EINVAL; | |
735 | goto end; | |
736 | ||
02aca193 PP |
737 | case REG_STAR_GLOB_STRING: |
738 | printk(KERN_WARNING "invalid register type for <= binary operator\n"); | |
739 | ret = -EINVAL; | |
740 | goto end; | |
07dfc1d0 MD |
741 | case REG_STRING: |
742 | insn->op = FILTER_OP_LE_STRING; | |
743 | break; | |
744 | case REG_S64: | |
745 | if (vstack_bx(stack)->type == REG_S64) | |
746 | insn->op = FILTER_OP_LE_S64; | |
747 | else | |
748 | insn->op = FILTER_OP_LE_DOUBLE_S64; | |
749 | break; | |
750 | case REG_DOUBLE: | |
751 | if (vstack_bx(stack)->type == REG_S64) | |
752 | insn->op = FILTER_OP_LE_S64_DOUBLE; | |
753 | else | |
754 | insn->op = FILTER_OP_LE_DOUBLE; | |
755 | break; | |
756 | } | |
757 | vstack_ax(stack)->type = REG_S64; | |
758 | next_pc += sizeof(struct binary_op); | |
759 | break; | |
760 | } | |
761 | ||
762 | case FILTER_OP_EQ_STRING: | |
763 | case FILTER_OP_NE_STRING: | |
764 | case FILTER_OP_GT_STRING: | |
765 | case FILTER_OP_LT_STRING: | |
766 | case FILTER_OP_GE_STRING: | |
767 | case FILTER_OP_LE_STRING: | |
02aca193 PP |
768 | case FILTER_OP_EQ_STAR_GLOB_STRING: |
769 | case FILTER_OP_NE_STAR_GLOB_STRING: | |
07dfc1d0 MD |
770 | case FILTER_OP_EQ_S64: |
771 | case FILTER_OP_NE_S64: | |
772 | case FILTER_OP_GT_S64: | |
773 | case FILTER_OP_LT_S64: | |
774 | case FILTER_OP_GE_S64: | |
775 | case FILTER_OP_LE_S64: | |
776 | case FILTER_OP_EQ_DOUBLE: | |
777 | case FILTER_OP_NE_DOUBLE: | |
778 | case FILTER_OP_GT_DOUBLE: | |
779 | case FILTER_OP_LT_DOUBLE: | |
780 | case FILTER_OP_GE_DOUBLE: | |
781 | case FILTER_OP_LE_DOUBLE: | |
782 | case FILTER_OP_EQ_DOUBLE_S64: | |
783 | case FILTER_OP_NE_DOUBLE_S64: | |
784 | case FILTER_OP_GT_DOUBLE_S64: | |
785 | case FILTER_OP_LT_DOUBLE_S64: | |
786 | case FILTER_OP_GE_DOUBLE_S64: | |
787 | case FILTER_OP_LE_DOUBLE_S64: | |
788 | case FILTER_OP_EQ_S64_DOUBLE: | |
789 | case FILTER_OP_NE_S64_DOUBLE: | |
790 | case FILTER_OP_GT_S64_DOUBLE: | |
791 | case FILTER_OP_LT_S64_DOUBLE: | |
792 | case FILTER_OP_GE_S64_DOUBLE: | |
793 | case FILTER_OP_LE_S64_DOUBLE: | |
e16c054b MD |
794 | case FILTER_OP_BIT_RSHIFT: |
795 | case FILTER_OP_BIT_LSHIFT: | |
3834b99f MD |
796 | case FILTER_OP_BIT_AND: |
797 | case FILTER_OP_BIT_OR: | |
798 | case FILTER_OP_BIT_XOR: | |
07dfc1d0 MD |
799 | { |
800 | /* Pop 2, push 1 */ | |
801 | if (vstack_pop(stack)) { | |
802 | ret = -EINVAL; | |
803 | goto end; | |
804 | } | |
805 | vstack_ax(stack)->type = REG_S64; | |
806 | next_pc += sizeof(struct binary_op); | |
807 | break; | |
808 | } | |
809 | ||
810 | /* unary */ | |
811 | case FILTER_OP_UNARY_PLUS: | |
812 | { | |
813 | struct unary_op *insn = (struct unary_op *) pc; | |
814 | ||
815 | switch(vstack_ax(stack)->type) { | |
816 | default: | |
817 | printk(KERN_WARNING "unknown register type\n"); | |
818 | ret = -EINVAL; | |
819 | goto end; | |
820 | ||
821 | case REG_S64: | |
822 | insn->op = FILTER_OP_UNARY_PLUS_S64; | |
823 | break; | |
824 | case REG_DOUBLE: | |
825 | insn->op = FILTER_OP_UNARY_PLUS_DOUBLE; | |
826 | break; | |
827 | } | |
828 | /* Pop 1, push 1 */ | |
829 | next_pc += sizeof(struct unary_op); | |
830 | break; | |
831 | } | |
832 | ||
833 | case FILTER_OP_UNARY_MINUS: | |
834 | { | |
835 | struct unary_op *insn = (struct unary_op *) pc; | |
836 | ||
837 | switch(vstack_ax(stack)->type) { | |
838 | default: | |
839 | printk(KERN_WARNING "unknown register type\n"); | |
840 | ret = -EINVAL; | |
841 | goto end; | |
842 | ||
843 | case REG_S64: | |
844 | insn->op = FILTER_OP_UNARY_MINUS_S64; | |
845 | break; | |
846 | case REG_DOUBLE: | |
847 | insn->op = FILTER_OP_UNARY_MINUS_DOUBLE; | |
848 | break; | |
849 | } | |
850 | /* Pop 1, push 1 */ | |
851 | next_pc += sizeof(struct unary_op); | |
852 | break; | |
853 | } | |
854 | ||
855 | case FILTER_OP_UNARY_NOT: | |
856 | { | |
857 | struct unary_op *insn = (struct unary_op *) pc; | |
858 | ||
859 | switch(vstack_ax(stack)->type) { | |
860 | default: | |
861 | printk(KERN_WARNING "unknown register type\n"); | |
862 | ret = -EINVAL; | |
863 | goto end; | |
864 | ||
865 | case REG_S64: | |
866 | insn->op = FILTER_OP_UNARY_NOT_S64; | |
867 | break; | |
868 | case REG_DOUBLE: | |
869 | insn->op = FILTER_OP_UNARY_NOT_DOUBLE; | |
870 | break; | |
871 | } | |
872 | /* Pop 1, push 1 */ | |
873 | next_pc += sizeof(struct unary_op); | |
874 | break; | |
875 | } | |
876 | ||
e16c054b MD |
877 | case FILTER_OP_UNARY_BIT_NOT: |
878 | { | |
879 | /* Pop 1, push 1 */ | |
880 | next_pc += sizeof(struct unary_op); | |
881 | break; | |
882 | } | |
883 | ||
07dfc1d0 MD |
884 | case FILTER_OP_UNARY_PLUS_S64: |
885 | case FILTER_OP_UNARY_MINUS_S64: | |
886 | case FILTER_OP_UNARY_NOT_S64: | |
887 | case FILTER_OP_UNARY_PLUS_DOUBLE: | |
888 | case FILTER_OP_UNARY_MINUS_DOUBLE: | |
889 | case FILTER_OP_UNARY_NOT_DOUBLE: | |
890 | { | |
891 | /* Pop 1, push 1 */ | |
892 | next_pc += sizeof(struct unary_op); | |
893 | break; | |
894 | } | |
895 | ||
896 | /* logical */ | |
897 | case FILTER_OP_AND: | |
898 | case FILTER_OP_OR: | |
899 | { | |
900 | /* Continue to next instruction */ | |
901 | /* Pop 1 when jump not taken */ | |
902 | if (vstack_pop(stack)) { | |
903 | ret = -EINVAL; | |
904 | goto end; | |
905 | } | |
906 | next_pc += sizeof(struct logical_op); | |
907 | break; | |
908 | } | |
909 | ||
910 | /* load field ref */ | |
911 | case FILTER_OP_LOAD_FIELD_REF: | |
912 | { | |
913 | printk(KERN_WARNING "Unknown field ref type\n"); | |
914 | ret = -EINVAL; | |
915 | goto end; | |
916 | } | |
917 | /* get context ref */ | |
918 | case FILTER_OP_GET_CONTEXT_REF: | |
919 | { | |
920 | printk(KERN_WARNING "Unknown get context ref type\n"); | |
921 | ret = -EINVAL; | |
922 | goto end; | |
923 | } | |
924 | case FILTER_OP_LOAD_FIELD_REF_STRING: | |
925 | case FILTER_OP_LOAD_FIELD_REF_SEQUENCE: | |
926 | case FILTER_OP_GET_CONTEXT_REF_STRING: | |
f127e61e MD |
927 | case FILTER_OP_LOAD_FIELD_REF_USER_STRING: |
928 | case FILTER_OP_LOAD_FIELD_REF_USER_SEQUENCE: | |
07dfc1d0 MD |
929 | { |
930 | if (vstack_push(stack)) { | |
931 | ret = -EINVAL; | |
932 | goto end; | |
933 | } | |
934 | vstack_ax(stack)->type = REG_STRING; | |
935 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
936 | break; | |
937 | } | |
938 | case FILTER_OP_LOAD_FIELD_REF_S64: | |
939 | case FILTER_OP_GET_CONTEXT_REF_S64: | |
940 | { | |
941 | if (vstack_push(stack)) { | |
942 | ret = -EINVAL; | |
943 | goto end; | |
944 | } | |
945 | vstack_ax(stack)->type = REG_S64; | |
946 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
947 | break; | |
948 | } | |
949 | case FILTER_OP_LOAD_FIELD_REF_DOUBLE: | |
950 | case FILTER_OP_GET_CONTEXT_REF_DOUBLE: | |
951 | { | |
952 | if (vstack_push(stack)) { | |
953 | ret = -EINVAL; | |
954 | goto end; | |
955 | } | |
956 | vstack_ax(stack)->type = REG_DOUBLE; | |
957 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
958 | break; | |
959 | } | |
960 | ||
961 | /* load from immediate operand */ | |
962 | case FILTER_OP_LOAD_STRING: | |
963 | { | |
964 | struct load_op *insn = (struct load_op *) pc; | |
965 | ||
966 | if (vstack_push(stack)) { | |
967 | ret = -EINVAL; | |
968 | goto end; | |
969 | } | |
970 | vstack_ax(stack)->type = REG_STRING; | |
971 | next_pc += sizeof(struct load_op) + strlen(insn->data) + 1; | |
972 | break; | |
973 | } | |
974 | ||
02aca193 PP |
975 | case FILTER_OP_LOAD_STAR_GLOB_STRING: |
976 | { | |
977 | struct load_op *insn = (struct load_op *) pc; | |
978 | ||
979 | if (vstack_push(stack)) { | |
980 | ret = -EINVAL; | |
981 | goto end; | |
982 | } | |
983 | vstack_ax(stack)->type = REG_STAR_GLOB_STRING; | |
984 | next_pc += sizeof(struct load_op) + strlen(insn->data) + 1; | |
985 | break; | |
986 | } | |
987 | ||
07dfc1d0 MD |
988 | case FILTER_OP_LOAD_S64: |
989 | { | |
990 | if (vstack_push(stack)) { | |
991 | ret = -EINVAL; | |
992 | goto end; | |
993 | } | |
994 | vstack_ax(stack)->type = REG_S64; | |
995 | next_pc += sizeof(struct load_op) | |
996 | + sizeof(struct literal_numeric); | |
997 | break; | |
998 | } | |
999 | ||
1000 | case FILTER_OP_LOAD_DOUBLE: | |
1001 | { | |
1002 | if (vstack_push(stack)) { | |
1003 | ret = -EINVAL; | |
1004 | goto end; | |
1005 | } | |
1006 | vstack_ax(stack)->type = REG_DOUBLE; | |
1007 | next_pc += sizeof(struct load_op) | |
1008 | + sizeof(struct literal_double); | |
1009 | break; | |
1010 | } | |
1011 | ||
1012 | /* cast */ | |
1013 | case FILTER_OP_CAST_TO_S64: | |
1014 | { | |
1015 | struct cast_op *insn = (struct cast_op *) pc; | |
1016 | ||
1017 | switch (vstack_ax(stack)->type) { | |
1018 | default: | |
1019 | printk(KERN_WARNING "unknown register type\n"); | |
1020 | ret = -EINVAL; | |
1021 | goto end; | |
1022 | ||
1023 | case REG_STRING: | |
02aca193 | 1024 | case REG_STAR_GLOB_STRING: |
07dfc1d0 MD |
1025 | printk(KERN_WARNING "Cast op can only be applied to numeric or floating point registers\n"); |
1026 | ret = -EINVAL; | |
1027 | goto end; | |
1028 | case REG_S64: | |
1029 | insn->op = FILTER_OP_CAST_NOP; | |
1030 | break; | |
1031 | case REG_DOUBLE: | |
1032 | insn->op = FILTER_OP_CAST_DOUBLE_TO_S64; | |
1033 | break; | |
1034 | } | |
1035 | /* Pop 1, push 1 */ | |
1036 | vstack_ax(stack)->type = REG_S64; | |
1037 | next_pc += sizeof(struct cast_op); | |
1038 | break; | |
1039 | } | |
1040 | case FILTER_OP_CAST_DOUBLE_TO_S64: | |
1041 | { | |
1042 | /* Pop 1, push 1 */ | |
1043 | vstack_ax(stack)->type = REG_S64; | |
1044 | next_pc += sizeof(struct cast_op); | |
1045 | break; | |
1046 | } | |
1047 | case FILTER_OP_CAST_NOP: | |
1048 | { | |
1049 | next_pc += sizeof(struct cast_op); | |
1050 | break; | |
1051 | } | |
1052 | ||
3834b99f MD |
1053 | /* |
1054 | * Instructions for recursive traversal through composed types. | |
1055 | */ | |
1056 | case FILTER_OP_GET_CONTEXT_ROOT: | |
1057 | { | |
1058 | if (vstack_push(stack)) { | |
1059 | ret = -EINVAL; | |
1060 | goto end; | |
1061 | } | |
1062 | vstack_ax(stack)->type = REG_PTR; | |
1063 | vstack_ax(stack)->load.type = LOAD_ROOT_CONTEXT; | |
1064 | next_pc += sizeof(struct load_op); | |
1065 | break; | |
1066 | } | |
1067 | case FILTER_OP_GET_APP_CONTEXT_ROOT: | |
1068 | { | |
1069 | if (vstack_push(stack)) { | |
1070 | ret = -EINVAL; | |
1071 | goto end; | |
1072 | } | |
1073 | vstack_ax(stack)->type = REG_PTR; | |
1074 | vstack_ax(stack)->load.type = LOAD_ROOT_APP_CONTEXT; | |
1075 | next_pc += sizeof(struct load_op); | |
1076 | break; | |
1077 | } | |
1078 | case FILTER_OP_GET_PAYLOAD_ROOT: | |
1079 | { | |
1080 | if (vstack_push(stack)) { | |
1081 | ret = -EINVAL; | |
1082 | goto end; | |
1083 | } | |
1084 | vstack_ax(stack)->type = REG_PTR; | |
1085 | vstack_ax(stack)->load.type = LOAD_ROOT_PAYLOAD; | |
1086 | next_pc += sizeof(struct load_op); | |
1087 | break; | |
1088 | } | |
1089 | ||
1090 | case FILTER_OP_LOAD_FIELD: | |
1091 | { | |
1092 | struct load_op *insn = (struct load_op *) pc; | |
1093 | ||
1094 | WARN_ON_ONCE(vstack_ax(stack)->type != REG_PTR); | |
1095 | /* Pop 1, push 1 */ | |
1096 | ret = specialize_load_field(vstack_ax(stack), insn); | |
1097 | if (ret) | |
1098 | goto end; | |
1099 | ||
1100 | next_pc += sizeof(struct load_op); | |
1101 | break; | |
1102 | } | |
1103 | ||
1104 | case FILTER_OP_LOAD_FIELD_S8: | |
1105 | case FILTER_OP_LOAD_FIELD_S16: | |
1106 | case FILTER_OP_LOAD_FIELD_S32: | |
1107 | case FILTER_OP_LOAD_FIELD_S64: | |
1108 | case FILTER_OP_LOAD_FIELD_U8: | |
1109 | case FILTER_OP_LOAD_FIELD_U16: | |
1110 | case FILTER_OP_LOAD_FIELD_U32: | |
1111 | case FILTER_OP_LOAD_FIELD_U64: | |
1112 | { | |
1113 | /* Pop 1, push 1 */ | |
1114 | vstack_ax(stack)->type = REG_S64; | |
1115 | next_pc += sizeof(struct load_op); | |
1116 | break; | |
1117 | } | |
1118 | ||
1119 | case FILTER_OP_LOAD_FIELD_STRING: | |
1120 | case FILTER_OP_LOAD_FIELD_SEQUENCE: | |
1121 | { | |
1122 | /* Pop 1, push 1 */ | |
1123 | vstack_ax(stack)->type = REG_STRING; | |
1124 | next_pc += sizeof(struct load_op); | |
1125 | break; | |
1126 | } | |
1127 | ||
1128 | case FILTER_OP_LOAD_FIELD_DOUBLE: | |
1129 | { | |
1130 | /* Pop 1, push 1 */ | |
1131 | vstack_ax(stack)->type = REG_DOUBLE; | |
1132 | next_pc += sizeof(struct load_op); | |
1133 | break; | |
1134 | } | |
1135 | ||
1136 | case FILTER_OP_GET_SYMBOL: | |
1137 | { | |
1138 | struct load_op *insn = (struct load_op *) pc; | |
1139 | ||
1140 | dbg_printk("op get symbol\n"); | |
1141 | switch (vstack_ax(stack)->load.type) { | |
1142 | case LOAD_OBJECT: | |
1143 | printk(KERN_WARNING "Nested fields not implemented yet.\n"); | |
1144 | ret = -EINVAL; | |
1145 | goto end; | |
1146 | case LOAD_ROOT_CONTEXT: | |
1147 | /* Lookup context field. */ | |
1148 | ret = specialize_context_lookup(bytecode, insn, | |
1149 | &vstack_ax(stack)->load); | |
1150 | if (ret) | |
1151 | goto end; | |
1152 | break; | |
1153 | case LOAD_ROOT_APP_CONTEXT: | |
1154 | ret = -EINVAL; | |
1155 | goto end; | |
1156 | case LOAD_ROOT_PAYLOAD: | |
1157 | /* Lookup event payload field. */ | |
1158 | ret = specialize_event_payload_lookup(event, | |
1159 | bytecode, insn, | |
1160 | &vstack_ax(stack)->load); | |
1161 | if (ret) | |
1162 | goto end; | |
1163 | break; | |
1164 | } | |
1165 | next_pc += sizeof(struct load_op) + sizeof(struct get_symbol); | |
1166 | break; | |
1167 | } | |
1168 | ||
1169 | case FILTER_OP_GET_SYMBOL_FIELD: | |
1170 | { | |
1171 | /* Always generated by specialize phase. */ | |
1172 | ret = -EINVAL; | |
1173 | goto end; | |
1174 | } | |
1175 | ||
1176 | case FILTER_OP_GET_INDEX_U16: | |
1177 | { | |
1178 | struct load_op *insn = (struct load_op *) pc; | |
1179 | struct get_index_u16 *index = (struct get_index_u16 *) insn->data; | |
1180 | ||
1181 | dbg_printk("op get index u16\n"); | |
1182 | /* Pop 1, push 1 */ | |
1183 | ret = specialize_get_index(bytecode, insn, index->index, | |
1184 | vstack_ax(stack), sizeof(*index)); | |
1185 | if (ret) | |
1186 | goto end; | |
1187 | next_pc += sizeof(struct load_op) + sizeof(struct get_index_u16); | |
1188 | break; | |
1189 | } | |
1190 | ||
1191 | case FILTER_OP_GET_INDEX_U64: | |
1192 | { | |
1193 | struct load_op *insn = (struct load_op *) pc; | |
1194 | struct get_index_u64 *index = (struct get_index_u64 *) insn->data; | |
1195 | ||
1196 | dbg_printk("op get index u64\n"); | |
1197 | /* Pop 1, push 1 */ | |
1198 | ret = specialize_get_index(bytecode, insn, index->index, | |
1199 | vstack_ax(stack), sizeof(*index)); | |
1200 | if (ret) | |
1201 | goto end; | |
1202 | next_pc += sizeof(struct load_op) + sizeof(struct get_index_u64); | |
1203 | break; | |
1204 | } | |
1205 | ||
07dfc1d0 MD |
1206 | } |
1207 | } | |
1208 | end: | |
1209 | return ret; | |
1210 | } |