Commit | Line | Data |
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07dfc1d0 MD |
1 | /* |
2 | * lttng-filter-specialize.c | |
3 | * | |
4 | * LTTng modules filter code specializer. | |
5 | * | |
bbf3aef5 | 6 | * Copyright (C) 2010-2016 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
07dfc1d0 | 7 | * |
bbf3aef5 MD |
8 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
9 | * of this software and associated documentation files (the "Software"), to deal | |
10 | * in the Software without restriction, including without limitation the rights | |
11 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
12 | * copies of the Software, and to permit persons to whom the Software is | |
13 | * furnished to do so, subject to the following conditions: | |
07dfc1d0 | 14 | * |
bbf3aef5 MD |
15 | * The above copyright notice and this permission notice shall be included in |
16 | * all copies or substantial portions of the Software. | |
07dfc1d0 | 17 | * |
bbf3aef5 MD |
18 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
19 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
20 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | |
21 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
22 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
23 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
24 | * SOFTWARE. | |
07dfc1d0 MD |
25 | */ |
26 | ||
3834b99f | 27 | #include <linux/slab.h> |
241ae9a8 | 28 | #include <lttng-filter.h> |
3834b99f | 29 | #include "lib/align.h" |
07dfc1d0 | 30 | |
3834b99f MD |
31 | static ssize_t bytecode_reserve_data(struct bytecode_runtime *runtime, |
32 | size_t align, size_t len) | |
33 | { | |
34 | ssize_t ret; | |
35 | size_t padding = offset_align(runtime->data_len, align); | |
36 | size_t new_len = runtime->data_len + padding + len; | |
37 | size_t new_alloc_len = new_len; | |
38 | size_t old_alloc_len = runtime->data_alloc_len; | |
39 | ||
40 | if (new_len > FILTER_MAX_DATA_LEN) | |
41 | return -EINVAL; | |
42 | ||
43 | if (new_alloc_len > old_alloc_len) { | |
44 | char *newptr; | |
45 | ||
46 | new_alloc_len = | |
47 | max_t(size_t, 1U << get_count_order(new_alloc_len), old_alloc_len << 1); | |
48 | newptr = krealloc(runtime->data, new_alloc_len, GFP_KERNEL); | |
49 | if (!newptr) | |
50 | return -ENOMEM; | |
51 | runtime->data = newptr; | |
52 | /* We zero directly the memory from start of allocation. */ | |
53 | memset(&runtime->data[old_alloc_len], 0, new_alloc_len - old_alloc_len); | |
54 | runtime->data_alloc_len = new_alloc_len; | |
55 | } | |
56 | runtime->data_len += padding; | |
57 | ret = runtime->data_len; | |
58 | runtime->data_len += len; | |
59 | return ret; | |
60 | } | |
61 | ||
62 | static ssize_t bytecode_push_data(struct bytecode_runtime *runtime, | |
63 | const void *p, size_t align, size_t len) | |
64 | { | |
65 | ssize_t offset; | |
66 | ||
67 | offset = bytecode_reserve_data(runtime, align, len); | |
68 | if (offset < 0) | |
69 | return -ENOMEM; | |
70 | memcpy(&runtime->data[offset], p, len); | |
71 | return offset; | |
72 | } | |
73 | ||
74 | static int specialize_load_field(struct vstack_entry *stack_top, | |
75 | struct load_op *insn) | |
76 | { | |
77 | int ret; | |
78 | ||
79 | switch (stack_top->load.type) { | |
80 | case LOAD_OBJECT: | |
81 | break; | |
82 | case LOAD_ROOT_CONTEXT: | |
83 | case LOAD_ROOT_APP_CONTEXT: | |
84 | case LOAD_ROOT_PAYLOAD: | |
85 | default: | |
86 | dbg_printk("Filter warning: cannot load root, missing field name.\n"); | |
87 | ret = -EINVAL; | |
88 | goto end; | |
89 | } | |
90 | switch (stack_top->load.object_type) { | |
91 | case OBJECT_TYPE_S8: | |
92 | dbg_printk("op load field s8\n"); | |
93 | stack_top->type = REG_S64; | |
94 | if (!stack_top->load.rev_bo) | |
95 | insn->op = FILTER_OP_LOAD_FIELD_S8; | |
96 | break; | |
97 | case OBJECT_TYPE_S16: | |
98 | dbg_printk("op load field s16\n"); | |
99 | stack_top->type = REG_S64; | |
100 | if (!stack_top->load.rev_bo) | |
101 | insn->op = FILTER_OP_LOAD_FIELD_S16; | |
102 | break; | |
103 | case OBJECT_TYPE_S32: | |
104 | dbg_printk("op load field s32\n"); | |
105 | stack_top->type = REG_S64; | |
106 | if (!stack_top->load.rev_bo) | |
107 | insn->op = FILTER_OP_LOAD_FIELD_S32; | |
108 | break; | |
109 | case OBJECT_TYPE_S64: | |
110 | dbg_printk("op load field s64\n"); | |
111 | stack_top->type = REG_S64; | |
112 | if (!stack_top->load.rev_bo) | |
113 | insn->op = FILTER_OP_LOAD_FIELD_S64; | |
114 | break; | |
115 | case OBJECT_TYPE_U8: | |
116 | dbg_printk("op load field u8\n"); | |
117 | stack_top->type = REG_S64; | |
118 | insn->op = FILTER_OP_LOAD_FIELD_U8; | |
119 | break; | |
120 | case OBJECT_TYPE_U16: | |
121 | dbg_printk("op load field u16\n"); | |
122 | stack_top->type = REG_S64; | |
123 | if (!stack_top->load.rev_bo) | |
124 | insn->op = FILTER_OP_LOAD_FIELD_U16; | |
125 | break; | |
126 | case OBJECT_TYPE_U32: | |
127 | dbg_printk("op load field u32\n"); | |
128 | stack_top->type = REG_S64; | |
129 | if (!stack_top->load.rev_bo) | |
130 | insn->op = FILTER_OP_LOAD_FIELD_U32; | |
131 | break; | |
132 | case OBJECT_TYPE_U64: | |
133 | dbg_printk("op load field u64\n"); | |
134 | stack_top->type = REG_S64; | |
135 | if (!stack_top->load.rev_bo) | |
136 | insn->op = FILTER_OP_LOAD_FIELD_U64; | |
137 | break; | |
138 | case OBJECT_TYPE_DOUBLE: | |
139 | printk(KERN_WARNING "Double type unsupported\n\n"); | |
140 | ret = -EINVAL; | |
141 | goto end; | |
142 | case OBJECT_TYPE_STRING: | |
143 | dbg_printk("op load field string\n"); | |
144 | stack_top->type = REG_STRING; | |
145 | insn->op = FILTER_OP_LOAD_FIELD_STRING; | |
146 | break; | |
147 | case OBJECT_TYPE_STRING_SEQUENCE: | |
148 | dbg_printk("op load field string sequence\n"); | |
149 | stack_top->type = REG_STRING; | |
150 | insn->op = FILTER_OP_LOAD_FIELD_SEQUENCE; | |
151 | break; | |
152 | case OBJECT_TYPE_DYNAMIC: | |
153 | ret = -EINVAL; | |
154 | goto end; | |
155 | case OBJECT_TYPE_SEQUENCE: | |
156 | case OBJECT_TYPE_ARRAY: | |
157 | case OBJECT_TYPE_STRUCT: | |
158 | case OBJECT_TYPE_VARIANT: | |
159 | printk(KERN_WARNING "Sequences, arrays, struct and variant cannot be loaded (nested types).\n"); | |
160 | ret = -EINVAL; | |
161 | goto end; | |
162 | } | |
163 | return 0; | |
164 | ||
165 | end: | |
166 | return ret; | |
167 | } | |
168 | ||
169 | static int specialize_get_index_object_type(enum object_type *otype, | |
170 | int signedness, uint32_t elem_len) | |
171 | { | |
172 | switch (elem_len) { | |
173 | case 8: | |
174 | if (signedness) | |
175 | *otype = OBJECT_TYPE_S8; | |
176 | else | |
177 | *otype = OBJECT_TYPE_U8; | |
178 | break; | |
179 | case 16: | |
180 | if (signedness) | |
181 | *otype = OBJECT_TYPE_S16; | |
182 | else | |
183 | *otype = OBJECT_TYPE_U16; | |
184 | break; | |
185 | case 32: | |
186 | if (signedness) | |
187 | *otype = OBJECT_TYPE_S32; | |
188 | else | |
189 | *otype = OBJECT_TYPE_U32; | |
190 | break; | |
191 | case 64: | |
192 | if (signedness) | |
193 | *otype = OBJECT_TYPE_S64; | |
194 | else | |
195 | *otype = OBJECT_TYPE_U64; | |
196 | break; | |
197 | default: | |
198 | return -EINVAL; | |
199 | } | |
200 | return 0; | |
201 | } | |
202 | ||
203 | static int specialize_get_index(struct bytecode_runtime *runtime, | |
204 | struct load_op *insn, uint64_t index, | |
205 | struct vstack_entry *stack_top, | |
206 | int idx_len) | |
207 | { | |
208 | int ret; | |
209 | struct filter_get_index_data gid; | |
210 | ssize_t data_offset; | |
211 | ||
212 | memset(&gid, 0, sizeof(gid)); | |
213 | switch (stack_top->load.type) { | |
214 | case LOAD_OBJECT: | |
215 | switch (stack_top->load.object_type) { | |
216 | case OBJECT_TYPE_ARRAY: | |
217 | { | |
218 | const struct lttng_event_field *field; | |
219 | uint32_t elem_len, num_elems; | |
220 | int signedness; | |
221 | ||
222 | field = stack_top->load.field; | |
223 | elem_len = field->type.u.array.elem_type.u.basic.integer.size; | |
224 | signedness = field->type.u.array.elem_type.u.basic.integer.signedness; | |
225 | num_elems = field->type.u.array.length; | |
226 | if (index >= num_elems) { | |
227 | ret = -EINVAL; | |
228 | goto end; | |
229 | } | |
230 | ret = specialize_get_index_object_type(&stack_top->load.object_type, | |
231 | signedness, elem_len); | |
232 | if (ret) | |
233 | goto end; | |
234 | gid.offset = index * (elem_len / CHAR_BIT); | |
235 | gid.array_len = num_elems * (elem_len / CHAR_BIT); | |
236 | gid.elem.type = stack_top->load.object_type; | |
237 | gid.elem.len = elem_len; | |
238 | if (field->type.u.array.elem_type.u.basic.integer.reverse_byte_order) | |
239 | gid.elem.rev_bo = true; | |
240 | stack_top->load.rev_bo = gid.elem.rev_bo; | |
241 | break; | |
242 | } | |
243 | case OBJECT_TYPE_SEQUENCE: | |
244 | { | |
245 | const struct lttng_event_field *field; | |
246 | uint32_t elem_len; | |
247 | int signedness; | |
248 | ||
249 | field = stack_top->load.field; | |
250 | elem_len = field->type.u.sequence.elem_type.u.basic.integer.size; | |
251 | signedness = field->type.u.sequence.elem_type.u.basic.integer.signedness; | |
252 | ret = specialize_get_index_object_type(&stack_top->load.object_type, | |
253 | signedness, elem_len); | |
254 | if (ret) | |
255 | goto end; | |
256 | gid.offset = index * (elem_len / CHAR_BIT); | |
257 | gid.elem.type = stack_top->load.object_type; | |
258 | gid.elem.len = elem_len; | |
259 | if (field->type.u.sequence.elem_type.u.basic.integer.reverse_byte_order) | |
260 | gid.elem.rev_bo = true; | |
261 | stack_top->load.rev_bo = gid.elem.rev_bo; | |
262 | break; | |
263 | } | |
264 | case OBJECT_TYPE_STRUCT: | |
265 | /* Only generated by the specialize phase. */ | |
266 | case OBJECT_TYPE_VARIANT: /* Fall-through */ | |
267 | default: | |
268 | printk(KERN_WARNING "Unexpected get index type %d", | |
269 | (int) stack_top->load.object_type); | |
270 | ret = -EINVAL; | |
271 | goto end; | |
272 | } | |
273 | break; | |
274 | case LOAD_ROOT_CONTEXT: | |
275 | case LOAD_ROOT_APP_CONTEXT: | |
276 | case LOAD_ROOT_PAYLOAD: | |
277 | printk(KERN_WARNING "Index lookup for root field not implemented yet.\n"); | |
278 | ret = -EINVAL; | |
279 | goto end; | |
280 | } | |
281 | data_offset = bytecode_push_data(runtime, &gid, | |
282 | __alignof__(gid), sizeof(gid)); | |
283 | if (data_offset < 0) { | |
284 | ret = -EINVAL; | |
285 | goto end; | |
286 | } | |
287 | switch (idx_len) { | |
288 | case 2: | |
289 | ((struct get_index_u16 *) insn->data)->index = data_offset; | |
290 | break; | |
291 | case 8: | |
292 | ((struct get_index_u64 *) insn->data)->index = data_offset; | |
293 | break; | |
294 | default: | |
295 | ret = -EINVAL; | |
296 | goto end; | |
297 | } | |
298 | ||
299 | return 0; | |
300 | ||
301 | end: | |
302 | return ret; | |
303 | } | |
304 | ||
305 | static int specialize_context_lookup_name(struct bytecode_runtime *bytecode, | |
306 | struct load_op *insn) | |
307 | { | |
308 | uint16_t offset; | |
309 | const char *name; | |
310 | ||
311 | offset = ((struct get_symbol *) insn->data)->offset; | |
312 | name = bytecode->p.bc->bc.data + bytecode->p.bc->bc.reloc_offset + offset; | |
313 | return lttng_get_context_index(lttng_static_ctx, name); | |
314 | } | |
315 | ||
316 | static int specialize_load_object(const struct lttng_event_field *field, | |
317 | struct vstack_load *load, bool is_context) | |
318 | { | |
319 | load->type = LOAD_OBJECT; | |
320 | /* | |
321 | * LTTng-UST layout all integer fields as s64 on the stack for the filter. | |
322 | */ | |
323 | switch (field->type.atype) { | |
324 | case atype_integer: | |
325 | if (field->type.u.basic.integer.signedness) | |
326 | load->object_type = OBJECT_TYPE_S64; | |
327 | else | |
328 | load->object_type = OBJECT_TYPE_U64; | |
329 | load->rev_bo = false; | |
330 | break; | |
331 | case atype_enum: | |
332 | { | |
333 | const struct lttng_integer_type *itype = | |
334 | &field->type.u.basic.enumeration.container_type; | |
335 | ||
336 | if (itype->signedness) | |
337 | load->object_type = OBJECT_TYPE_S64; | |
338 | else | |
339 | load->object_type = OBJECT_TYPE_U64; | |
340 | load->rev_bo = false; | |
341 | break; | |
342 | } | |
343 | case atype_array: | |
344 | if (field->type.u.array.elem_type.atype != atype_integer) { | |
345 | printk(KERN_WARNING "Array nesting only supports integer types.\n"); | |
346 | return -EINVAL; | |
347 | } | |
348 | if (is_context) { | |
349 | load->object_type = OBJECT_TYPE_STRING; | |
350 | } else { | |
351 | if (field->type.u.array.elem_type.u.basic.integer.encoding == lttng_encode_none) { | |
352 | load->object_type = OBJECT_TYPE_ARRAY; | |
353 | load->field = field; | |
354 | } else { | |
355 | load->object_type = OBJECT_TYPE_STRING_SEQUENCE; | |
356 | } | |
357 | } | |
358 | break; | |
359 | case atype_sequence: | |
360 | if (field->type.u.sequence.elem_type.atype != atype_integer) { | |
361 | printk(KERN_WARNING "Sequence nesting only supports integer types.\n"); | |
362 | return -EINVAL; | |
363 | } | |
364 | if (is_context) { | |
365 | load->object_type = OBJECT_TYPE_STRING; | |
366 | } else { | |
367 | if (field->type.u.sequence.elem_type.u.basic.integer.encoding == lttng_encode_none) { | |
368 | load->object_type = OBJECT_TYPE_SEQUENCE; | |
369 | load->field = field; | |
370 | } else { | |
371 | load->object_type = OBJECT_TYPE_STRING_SEQUENCE; | |
372 | } | |
373 | } | |
374 | break; | |
375 | case atype_array_bitfield: | |
376 | printk(KERN_WARNING "Bitfield array type is not supported.\n"); | |
377 | return -EINVAL; | |
378 | case atype_sequence_bitfield: | |
379 | printk(KERN_WARNING "Bitfield sequence type is not supported.\n"); | |
380 | return -EINVAL; | |
381 | case atype_string: | |
382 | load->object_type = OBJECT_TYPE_STRING; | |
383 | break; | |
384 | case atype_struct: | |
385 | printk(KERN_WARNING "Structure type cannot be loaded.\n"); | |
386 | return -EINVAL; | |
387 | default: | |
388 | printk(KERN_WARNING "Unknown type: %d", (int) field->type.atype); | |
389 | return -EINVAL; | |
390 | } | |
391 | return 0; | |
392 | } | |
393 | ||
394 | static int specialize_context_lookup(struct bytecode_runtime *runtime, | |
395 | struct load_op *insn, | |
396 | struct vstack_load *load) | |
397 | { | |
398 | int idx, ret; | |
399 | struct lttng_ctx_field *ctx_field; | |
400 | struct lttng_event_field *field; | |
401 | struct filter_get_index_data gid; | |
402 | ssize_t data_offset; | |
403 | ||
404 | idx = specialize_context_lookup_name(runtime, insn); | |
405 | if (idx < 0) { | |
406 | return -ENOENT; | |
407 | } | |
408 | ctx_field = <tng_static_ctx->fields[idx]; | |
409 | field = &ctx_field->event_field; | |
410 | ret = specialize_load_object(field, load, true); | |
411 | if (ret) | |
412 | return ret; | |
413 | /* Specialize each get_symbol into a get_index. */ | |
414 | insn->op = FILTER_OP_GET_INDEX_U16; | |
415 | memset(&gid, 0, sizeof(gid)); | |
416 | gid.ctx_index = idx; | |
417 | gid.elem.type = load->object_type; | |
418 | data_offset = bytecode_push_data(runtime, &gid, | |
419 | __alignof__(gid), sizeof(gid)); | |
420 | if (data_offset < 0) { | |
421 | return -EINVAL; | |
422 | } | |
423 | ((struct get_index_u16 *) insn->data)->index = data_offset; | |
424 | return 0; | |
425 | } | |
426 | ||
427 | static int specialize_event_payload_lookup(struct lttng_event *event, | |
428 | struct bytecode_runtime *runtime, | |
429 | struct load_op *insn, | |
430 | struct vstack_load *load) | |
431 | { | |
432 | const char *name; | |
433 | uint16_t offset; | |
434 | const struct lttng_event_desc *desc = event->desc; | |
435 | unsigned int i, nr_fields; | |
436 | bool found = false; | |
437 | uint32_t field_offset = 0; | |
438 | const struct lttng_event_field *field; | |
439 | int ret; | |
440 | struct filter_get_index_data gid; | |
441 | ssize_t data_offset; | |
442 | ||
443 | nr_fields = desc->nr_fields; | |
444 | offset = ((struct get_symbol *) insn->data)->offset; | |
445 | name = runtime->p.bc->bc.data + runtime->p.bc->bc.reloc_offset + offset; | |
446 | for (i = 0; i < nr_fields; i++) { | |
447 | field = &desc->fields[i]; | |
448 | if (!strcmp(field->name, name)) { | |
449 | found = true; | |
450 | break; | |
451 | } | |
452 | /* compute field offset on stack */ | |
453 | switch (field->type.atype) { | |
454 | case atype_integer: | |
455 | case atype_enum: | |
456 | field_offset += sizeof(int64_t); | |
457 | break; | |
458 | case atype_array: | |
459 | case atype_sequence: | |
460 | case atype_array_bitfield: | |
461 | case atype_sequence_bitfield: | |
462 | field_offset += sizeof(unsigned long); | |
463 | field_offset += sizeof(void *); | |
464 | break; | |
465 | case atype_string: | |
466 | field_offset += sizeof(void *); | |
467 | break; | |
468 | default: | |
469 | ret = -EINVAL; | |
470 | goto end; | |
471 | } | |
472 | } | |
473 | if (!found) { | |
474 | ret = -EINVAL; | |
475 | goto end; | |
476 | } | |
477 | ||
478 | ret = specialize_load_object(field, load, false); | |
479 | if (ret) | |
480 | goto end; | |
481 | ||
482 | /* Specialize each get_symbol into a get_index. */ | |
483 | insn->op = FILTER_OP_GET_INDEX_U16; | |
484 | memset(&gid, 0, sizeof(gid)); | |
485 | gid.offset = field_offset; | |
486 | gid.elem.type = load->object_type; | |
487 | data_offset = bytecode_push_data(runtime, &gid, | |
488 | __alignof__(gid), sizeof(gid)); | |
489 | if (data_offset < 0) { | |
490 | ret = -EINVAL; | |
491 | goto end; | |
492 | } | |
493 | ((struct get_index_u16 *) insn->data)->index = data_offset; | |
494 | ret = 0; | |
495 | end: | |
496 | return ret; | |
497 | } | |
498 | ||
499 | int lttng_filter_specialize_bytecode(struct lttng_event *event, | |
500 | struct bytecode_runtime *bytecode) | |
07dfc1d0 MD |
501 | { |
502 | void *pc, *next_pc, *start_pc; | |
503 | int ret = -EINVAL; | |
504 | struct vstack _stack; | |
505 | struct vstack *stack = &_stack; | |
506 | ||
507 | vstack_init(stack); | |
508 | ||
3834b99f | 509 | start_pc = &bytecode->code[0]; |
07dfc1d0 MD |
510 | for (pc = next_pc = start_pc; pc - start_pc < bytecode->len; |
511 | pc = next_pc) { | |
512 | switch (*(filter_opcode_t *) pc) { | |
513 | case FILTER_OP_UNKNOWN: | |
514 | default: | |
515 | printk(KERN_WARNING "unknown bytecode op %u\n", | |
516 | (unsigned int) *(filter_opcode_t *) pc); | |
517 | ret = -EINVAL; | |
518 | goto end; | |
519 | ||
520 | case FILTER_OP_RETURN: | |
57ba4b41 | 521 | case FILTER_OP_RETURN_S64: |
07dfc1d0 MD |
522 | ret = 0; |
523 | goto end; | |
524 | ||
525 | /* binary */ | |
526 | case FILTER_OP_MUL: | |
527 | case FILTER_OP_DIV: | |
528 | case FILTER_OP_MOD: | |
529 | case FILTER_OP_PLUS: | |
530 | case FILTER_OP_MINUS: | |
07dfc1d0 MD |
531 | printk(KERN_WARNING "unsupported bytecode op %u\n", |
532 | (unsigned int) *(filter_opcode_t *) pc); | |
533 | ret = -EINVAL; | |
534 | goto end; | |
535 | ||
536 | case FILTER_OP_EQ: | |
537 | { | |
538 | struct binary_op *insn = (struct binary_op *) pc; | |
539 | ||
540 | switch(vstack_ax(stack)->type) { | |
541 | default: | |
542 | printk(KERN_WARNING "unknown register type\n"); | |
543 | ret = -EINVAL; | |
544 | goto end; | |
545 | ||
546 | case REG_STRING: | |
02aca193 PP |
547 | if (vstack_bx(stack)->type == REG_STAR_GLOB_STRING) |
548 | insn->op = FILTER_OP_EQ_STAR_GLOB_STRING; | |
549 | else | |
550 | insn->op = FILTER_OP_EQ_STRING; | |
551 | break; | |
552 | case REG_STAR_GLOB_STRING: | |
553 | insn->op = FILTER_OP_EQ_STAR_GLOB_STRING; | |
07dfc1d0 MD |
554 | break; |
555 | case REG_S64: | |
556 | if (vstack_bx(stack)->type == REG_S64) | |
557 | insn->op = FILTER_OP_EQ_S64; | |
558 | else | |
559 | insn->op = FILTER_OP_EQ_DOUBLE_S64; | |
560 | break; | |
561 | case REG_DOUBLE: | |
562 | if (vstack_bx(stack)->type == REG_S64) | |
563 | insn->op = FILTER_OP_EQ_S64_DOUBLE; | |
564 | else | |
565 | insn->op = FILTER_OP_EQ_DOUBLE; | |
566 | break; | |
567 | } | |
568 | /* Pop 2, push 1 */ | |
569 | if (vstack_pop(stack)) { | |
570 | ret = -EINVAL; | |
571 | goto end; | |
572 | } | |
573 | vstack_ax(stack)->type = REG_S64; | |
574 | next_pc += sizeof(struct binary_op); | |
575 | break; | |
576 | } | |
577 | ||
578 | case FILTER_OP_NE: | |
579 | { | |
580 | struct binary_op *insn = (struct binary_op *) pc; | |
581 | ||
582 | switch(vstack_ax(stack)->type) { | |
583 | default: | |
584 | printk(KERN_WARNING "unknown register type\n"); | |
585 | ret = -EINVAL; | |
586 | goto end; | |
587 | ||
588 | case REG_STRING: | |
02aca193 PP |
589 | if (vstack_bx(stack)->type == REG_STAR_GLOB_STRING) |
590 | insn->op = FILTER_OP_NE_STAR_GLOB_STRING; | |
591 | else | |
592 | insn->op = FILTER_OP_NE_STRING; | |
593 | break; | |
594 | case REG_STAR_GLOB_STRING: | |
595 | insn->op = FILTER_OP_NE_STAR_GLOB_STRING; | |
07dfc1d0 MD |
596 | break; |
597 | case REG_S64: | |
598 | if (vstack_bx(stack)->type == REG_S64) | |
599 | insn->op = FILTER_OP_NE_S64; | |
600 | else | |
601 | insn->op = FILTER_OP_NE_DOUBLE_S64; | |
602 | break; | |
603 | case REG_DOUBLE: | |
604 | if (vstack_bx(stack)->type == REG_S64) | |
605 | insn->op = FILTER_OP_NE_S64_DOUBLE; | |
606 | else | |
607 | insn->op = FILTER_OP_NE_DOUBLE; | |
608 | break; | |
609 | } | |
610 | /* Pop 2, push 1 */ | |
611 | if (vstack_pop(stack)) { | |
612 | ret = -EINVAL; | |
613 | goto end; | |
614 | } | |
615 | vstack_ax(stack)->type = REG_S64; | |
616 | next_pc += sizeof(struct binary_op); | |
617 | break; | |
618 | } | |
619 | ||
620 | case FILTER_OP_GT: | |
621 | { | |
622 | struct binary_op *insn = (struct binary_op *) pc; | |
623 | ||
624 | switch(vstack_ax(stack)->type) { | |
625 | default: | |
626 | printk(KERN_WARNING "unknown register type\n"); | |
627 | ret = -EINVAL; | |
628 | goto end; | |
629 | ||
02aca193 PP |
630 | case REG_STAR_GLOB_STRING: |
631 | printk(KERN_WARNING "invalid register type for > binary operator\n"); | |
632 | ret = -EINVAL; | |
633 | goto end; | |
07dfc1d0 MD |
634 | case REG_STRING: |
635 | insn->op = FILTER_OP_GT_STRING; | |
636 | break; | |
637 | case REG_S64: | |
638 | if (vstack_bx(stack)->type == REG_S64) | |
639 | insn->op = FILTER_OP_GT_S64; | |
640 | else | |
641 | insn->op = FILTER_OP_GT_DOUBLE_S64; | |
642 | break; | |
643 | case REG_DOUBLE: | |
644 | if (vstack_bx(stack)->type == REG_S64) | |
645 | insn->op = FILTER_OP_GT_S64_DOUBLE; | |
646 | else | |
647 | insn->op = FILTER_OP_GT_DOUBLE; | |
648 | break; | |
649 | } | |
650 | /* Pop 2, push 1 */ | |
651 | if (vstack_pop(stack)) { | |
652 | ret = -EINVAL; | |
653 | goto end; | |
654 | } | |
655 | vstack_ax(stack)->type = REG_S64; | |
656 | next_pc += sizeof(struct binary_op); | |
657 | break; | |
658 | } | |
659 | ||
660 | case FILTER_OP_LT: | |
661 | { | |
662 | struct binary_op *insn = (struct binary_op *) pc; | |
663 | ||
664 | switch(vstack_ax(stack)->type) { | |
665 | default: | |
666 | printk(KERN_WARNING "unknown register type\n"); | |
667 | ret = -EINVAL; | |
668 | goto end; | |
669 | ||
02aca193 PP |
670 | case REG_STAR_GLOB_STRING: |
671 | printk(KERN_WARNING "invalid register type for < binary operator\n"); | |
672 | ret = -EINVAL; | |
673 | goto end; | |
07dfc1d0 MD |
674 | case REG_STRING: |
675 | insn->op = FILTER_OP_LT_STRING; | |
676 | break; | |
677 | case REG_S64: | |
678 | if (vstack_bx(stack)->type == REG_S64) | |
679 | insn->op = FILTER_OP_LT_S64; | |
680 | else | |
681 | insn->op = FILTER_OP_LT_DOUBLE_S64; | |
682 | break; | |
683 | case REG_DOUBLE: | |
684 | if (vstack_bx(stack)->type == REG_S64) | |
685 | insn->op = FILTER_OP_LT_S64_DOUBLE; | |
686 | else | |
687 | insn->op = FILTER_OP_LT_DOUBLE; | |
688 | break; | |
689 | } | |
690 | /* Pop 2, push 1 */ | |
691 | if (vstack_pop(stack)) { | |
692 | ret = -EINVAL; | |
693 | goto end; | |
694 | } | |
695 | vstack_ax(stack)->type = REG_S64; | |
696 | next_pc += sizeof(struct binary_op); | |
697 | break; | |
698 | } | |
699 | ||
700 | case FILTER_OP_GE: | |
701 | { | |
702 | struct binary_op *insn = (struct binary_op *) pc; | |
703 | ||
704 | switch(vstack_ax(stack)->type) { | |
705 | default: | |
706 | printk(KERN_WARNING "unknown register type\n"); | |
707 | ret = -EINVAL; | |
708 | goto end; | |
709 | ||
02aca193 PP |
710 | case REG_STAR_GLOB_STRING: |
711 | printk(KERN_WARNING "invalid register type for >= binary operator\n"); | |
712 | ret = -EINVAL; | |
713 | goto end; | |
07dfc1d0 MD |
714 | case REG_STRING: |
715 | insn->op = FILTER_OP_GE_STRING; | |
716 | break; | |
717 | case REG_S64: | |
718 | if (vstack_bx(stack)->type == REG_S64) | |
719 | insn->op = FILTER_OP_GE_S64; | |
720 | else | |
721 | insn->op = FILTER_OP_GE_DOUBLE_S64; | |
722 | break; | |
723 | case REG_DOUBLE: | |
724 | if (vstack_bx(stack)->type == REG_S64) | |
725 | insn->op = FILTER_OP_GE_S64_DOUBLE; | |
726 | else | |
727 | insn->op = FILTER_OP_GE_DOUBLE; | |
728 | break; | |
729 | } | |
730 | /* Pop 2, push 1 */ | |
731 | if (vstack_pop(stack)) { | |
732 | ret = -EINVAL; | |
733 | goto end; | |
734 | } | |
735 | vstack_ax(stack)->type = REG_S64; | |
736 | next_pc += sizeof(struct binary_op); | |
737 | break; | |
738 | } | |
739 | case FILTER_OP_LE: | |
740 | { | |
741 | struct binary_op *insn = (struct binary_op *) pc; | |
742 | ||
743 | switch(vstack_ax(stack)->type) { | |
744 | default: | |
745 | printk(KERN_WARNING "unknown register type\n"); | |
746 | ret = -EINVAL; | |
747 | goto end; | |
748 | ||
02aca193 PP |
749 | case REG_STAR_GLOB_STRING: |
750 | printk(KERN_WARNING "invalid register type for <= binary operator\n"); | |
751 | ret = -EINVAL; | |
752 | goto end; | |
07dfc1d0 MD |
753 | case REG_STRING: |
754 | insn->op = FILTER_OP_LE_STRING; | |
755 | break; | |
756 | case REG_S64: | |
757 | if (vstack_bx(stack)->type == REG_S64) | |
758 | insn->op = FILTER_OP_LE_S64; | |
759 | else | |
760 | insn->op = FILTER_OP_LE_DOUBLE_S64; | |
761 | break; | |
762 | case REG_DOUBLE: | |
763 | if (vstack_bx(stack)->type == REG_S64) | |
764 | insn->op = FILTER_OP_LE_S64_DOUBLE; | |
765 | else | |
766 | insn->op = FILTER_OP_LE_DOUBLE; | |
767 | break; | |
768 | } | |
769 | vstack_ax(stack)->type = REG_S64; | |
770 | next_pc += sizeof(struct binary_op); | |
771 | break; | |
772 | } | |
773 | ||
774 | case FILTER_OP_EQ_STRING: | |
775 | case FILTER_OP_NE_STRING: | |
776 | case FILTER_OP_GT_STRING: | |
777 | case FILTER_OP_LT_STRING: | |
778 | case FILTER_OP_GE_STRING: | |
779 | case FILTER_OP_LE_STRING: | |
02aca193 PP |
780 | case FILTER_OP_EQ_STAR_GLOB_STRING: |
781 | case FILTER_OP_NE_STAR_GLOB_STRING: | |
07dfc1d0 MD |
782 | case FILTER_OP_EQ_S64: |
783 | case FILTER_OP_NE_S64: | |
784 | case FILTER_OP_GT_S64: | |
785 | case FILTER_OP_LT_S64: | |
786 | case FILTER_OP_GE_S64: | |
787 | case FILTER_OP_LE_S64: | |
788 | case FILTER_OP_EQ_DOUBLE: | |
789 | case FILTER_OP_NE_DOUBLE: | |
790 | case FILTER_OP_GT_DOUBLE: | |
791 | case FILTER_OP_LT_DOUBLE: | |
792 | case FILTER_OP_GE_DOUBLE: | |
793 | case FILTER_OP_LE_DOUBLE: | |
794 | case FILTER_OP_EQ_DOUBLE_S64: | |
795 | case FILTER_OP_NE_DOUBLE_S64: | |
796 | case FILTER_OP_GT_DOUBLE_S64: | |
797 | case FILTER_OP_LT_DOUBLE_S64: | |
798 | case FILTER_OP_GE_DOUBLE_S64: | |
799 | case FILTER_OP_LE_DOUBLE_S64: | |
800 | case FILTER_OP_EQ_S64_DOUBLE: | |
801 | case FILTER_OP_NE_S64_DOUBLE: | |
802 | case FILTER_OP_GT_S64_DOUBLE: | |
803 | case FILTER_OP_LT_S64_DOUBLE: | |
804 | case FILTER_OP_GE_S64_DOUBLE: | |
805 | case FILTER_OP_LE_S64_DOUBLE: | |
e16c054b MD |
806 | case FILTER_OP_BIT_RSHIFT: |
807 | case FILTER_OP_BIT_LSHIFT: | |
3834b99f MD |
808 | case FILTER_OP_BIT_AND: |
809 | case FILTER_OP_BIT_OR: | |
810 | case FILTER_OP_BIT_XOR: | |
07dfc1d0 MD |
811 | { |
812 | /* Pop 2, push 1 */ | |
813 | if (vstack_pop(stack)) { | |
814 | ret = -EINVAL; | |
815 | goto end; | |
816 | } | |
817 | vstack_ax(stack)->type = REG_S64; | |
818 | next_pc += sizeof(struct binary_op); | |
819 | break; | |
820 | } | |
821 | ||
822 | /* unary */ | |
823 | case FILTER_OP_UNARY_PLUS: | |
824 | { | |
825 | struct unary_op *insn = (struct unary_op *) pc; | |
826 | ||
827 | switch(vstack_ax(stack)->type) { | |
828 | default: | |
829 | printk(KERN_WARNING "unknown register type\n"); | |
830 | ret = -EINVAL; | |
831 | goto end; | |
832 | ||
833 | case REG_S64: | |
834 | insn->op = FILTER_OP_UNARY_PLUS_S64; | |
835 | break; | |
836 | case REG_DOUBLE: | |
837 | insn->op = FILTER_OP_UNARY_PLUS_DOUBLE; | |
838 | break; | |
839 | } | |
840 | /* Pop 1, push 1 */ | |
841 | next_pc += sizeof(struct unary_op); | |
842 | break; | |
843 | } | |
844 | ||
845 | case FILTER_OP_UNARY_MINUS: | |
846 | { | |
847 | struct unary_op *insn = (struct unary_op *) pc; | |
848 | ||
849 | switch(vstack_ax(stack)->type) { | |
850 | default: | |
851 | printk(KERN_WARNING "unknown register type\n"); | |
852 | ret = -EINVAL; | |
853 | goto end; | |
854 | ||
855 | case REG_S64: | |
856 | insn->op = FILTER_OP_UNARY_MINUS_S64; | |
857 | break; | |
858 | case REG_DOUBLE: | |
859 | insn->op = FILTER_OP_UNARY_MINUS_DOUBLE; | |
860 | break; | |
861 | } | |
862 | /* Pop 1, push 1 */ | |
863 | next_pc += sizeof(struct unary_op); | |
864 | break; | |
865 | } | |
866 | ||
867 | case FILTER_OP_UNARY_NOT: | |
868 | { | |
869 | struct unary_op *insn = (struct unary_op *) pc; | |
870 | ||
871 | switch(vstack_ax(stack)->type) { | |
872 | default: | |
873 | printk(KERN_WARNING "unknown register type\n"); | |
874 | ret = -EINVAL; | |
875 | goto end; | |
876 | ||
877 | case REG_S64: | |
878 | insn->op = FILTER_OP_UNARY_NOT_S64; | |
879 | break; | |
880 | case REG_DOUBLE: | |
881 | insn->op = FILTER_OP_UNARY_NOT_DOUBLE; | |
882 | break; | |
883 | } | |
884 | /* Pop 1, push 1 */ | |
885 | next_pc += sizeof(struct unary_op); | |
886 | break; | |
887 | } | |
888 | ||
e16c054b MD |
889 | case FILTER_OP_UNARY_BIT_NOT: |
890 | { | |
891 | /* Pop 1, push 1 */ | |
892 | next_pc += sizeof(struct unary_op); | |
893 | break; | |
894 | } | |
895 | ||
07dfc1d0 MD |
896 | case FILTER_OP_UNARY_PLUS_S64: |
897 | case FILTER_OP_UNARY_MINUS_S64: | |
898 | case FILTER_OP_UNARY_NOT_S64: | |
899 | case FILTER_OP_UNARY_PLUS_DOUBLE: | |
900 | case FILTER_OP_UNARY_MINUS_DOUBLE: | |
901 | case FILTER_OP_UNARY_NOT_DOUBLE: | |
902 | { | |
903 | /* Pop 1, push 1 */ | |
904 | next_pc += sizeof(struct unary_op); | |
905 | break; | |
906 | } | |
907 | ||
908 | /* logical */ | |
909 | case FILTER_OP_AND: | |
910 | case FILTER_OP_OR: | |
911 | { | |
912 | /* Continue to next instruction */ | |
913 | /* Pop 1 when jump not taken */ | |
914 | if (vstack_pop(stack)) { | |
915 | ret = -EINVAL; | |
916 | goto end; | |
917 | } | |
918 | next_pc += sizeof(struct logical_op); | |
919 | break; | |
920 | } | |
921 | ||
922 | /* load field ref */ | |
923 | case FILTER_OP_LOAD_FIELD_REF: | |
924 | { | |
925 | printk(KERN_WARNING "Unknown field ref type\n"); | |
926 | ret = -EINVAL; | |
927 | goto end; | |
928 | } | |
929 | /* get context ref */ | |
930 | case FILTER_OP_GET_CONTEXT_REF: | |
931 | { | |
932 | printk(KERN_WARNING "Unknown get context ref type\n"); | |
933 | ret = -EINVAL; | |
934 | goto end; | |
935 | } | |
936 | case FILTER_OP_LOAD_FIELD_REF_STRING: | |
937 | case FILTER_OP_LOAD_FIELD_REF_SEQUENCE: | |
938 | case FILTER_OP_GET_CONTEXT_REF_STRING: | |
f127e61e MD |
939 | case FILTER_OP_LOAD_FIELD_REF_USER_STRING: |
940 | case FILTER_OP_LOAD_FIELD_REF_USER_SEQUENCE: | |
07dfc1d0 MD |
941 | { |
942 | if (vstack_push(stack)) { | |
943 | ret = -EINVAL; | |
944 | goto end; | |
945 | } | |
946 | vstack_ax(stack)->type = REG_STRING; | |
947 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
948 | break; | |
949 | } | |
950 | case FILTER_OP_LOAD_FIELD_REF_S64: | |
951 | case FILTER_OP_GET_CONTEXT_REF_S64: | |
952 | { | |
953 | if (vstack_push(stack)) { | |
954 | ret = -EINVAL; | |
955 | goto end; | |
956 | } | |
957 | vstack_ax(stack)->type = REG_S64; | |
958 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
959 | break; | |
960 | } | |
961 | case FILTER_OP_LOAD_FIELD_REF_DOUBLE: | |
962 | case FILTER_OP_GET_CONTEXT_REF_DOUBLE: | |
963 | { | |
964 | if (vstack_push(stack)) { | |
965 | ret = -EINVAL; | |
966 | goto end; | |
967 | } | |
968 | vstack_ax(stack)->type = REG_DOUBLE; | |
969 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
970 | break; | |
971 | } | |
972 | ||
973 | /* load from immediate operand */ | |
974 | case FILTER_OP_LOAD_STRING: | |
975 | { | |
976 | struct load_op *insn = (struct load_op *) pc; | |
977 | ||
978 | if (vstack_push(stack)) { | |
979 | ret = -EINVAL; | |
980 | goto end; | |
981 | } | |
982 | vstack_ax(stack)->type = REG_STRING; | |
983 | next_pc += sizeof(struct load_op) + strlen(insn->data) + 1; | |
984 | break; | |
985 | } | |
986 | ||
02aca193 PP |
987 | case FILTER_OP_LOAD_STAR_GLOB_STRING: |
988 | { | |
989 | struct load_op *insn = (struct load_op *) pc; | |
990 | ||
991 | if (vstack_push(stack)) { | |
992 | ret = -EINVAL; | |
993 | goto end; | |
994 | } | |
995 | vstack_ax(stack)->type = REG_STAR_GLOB_STRING; | |
996 | next_pc += sizeof(struct load_op) + strlen(insn->data) + 1; | |
997 | break; | |
998 | } | |
999 | ||
07dfc1d0 MD |
1000 | case FILTER_OP_LOAD_S64: |
1001 | { | |
1002 | if (vstack_push(stack)) { | |
1003 | ret = -EINVAL; | |
1004 | goto end; | |
1005 | } | |
1006 | vstack_ax(stack)->type = REG_S64; | |
1007 | next_pc += sizeof(struct load_op) | |
1008 | + sizeof(struct literal_numeric); | |
1009 | break; | |
1010 | } | |
1011 | ||
1012 | case FILTER_OP_LOAD_DOUBLE: | |
1013 | { | |
1014 | if (vstack_push(stack)) { | |
1015 | ret = -EINVAL; | |
1016 | goto end; | |
1017 | } | |
1018 | vstack_ax(stack)->type = REG_DOUBLE; | |
1019 | next_pc += sizeof(struct load_op) | |
1020 | + sizeof(struct literal_double); | |
1021 | break; | |
1022 | } | |
1023 | ||
1024 | /* cast */ | |
1025 | case FILTER_OP_CAST_TO_S64: | |
1026 | { | |
1027 | struct cast_op *insn = (struct cast_op *) pc; | |
1028 | ||
1029 | switch (vstack_ax(stack)->type) { | |
1030 | default: | |
1031 | printk(KERN_WARNING "unknown register type\n"); | |
1032 | ret = -EINVAL; | |
1033 | goto end; | |
1034 | ||
1035 | case REG_STRING: | |
02aca193 | 1036 | case REG_STAR_GLOB_STRING: |
07dfc1d0 MD |
1037 | printk(KERN_WARNING "Cast op can only be applied to numeric or floating point registers\n"); |
1038 | ret = -EINVAL; | |
1039 | goto end; | |
1040 | case REG_S64: | |
1041 | insn->op = FILTER_OP_CAST_NOP; | |
1042 | break; | |
1043 | case REG_DOUBLE: | |
1044 | insn->op = FILTER_OP_CAST_DOUBLE_TO_S64; | |
1045 | break; | |
1046 | } | |
1047 | /* Pop 1, push 1 */ | |
1048 | vstack_ax(stack)->type = REG_S64; | |
1049 | next_pc += sizeof(struct cast_op); | |
1050 | break; | |
1051 | } | |
1052 | case FILTER_OP_CAST_DOUBLE_TO_S64: | |
1053 | { | |
1054 | /* Pop 1, push 1 */ | |
1055 | vstack_ax(stack)->type = REG_S64; | |
1056 | next_pc += sizeof(struct cast_op); | |
1057 | break; | |
1058 | } | |
1059 | case FILTER_OP_CAST_NOP: | |
1060 | { | |
1061 | next_pc += sizeof(struct cast_op); | |
1062 | break; | |
1063 | } | |
1064 | ||
3834b99f MD |
1065 | /* |
1066 | * Instructions for recursive traversal through composed types. | |
1067 | */ | |
1068 | case FILTER_OP_GET_CONTEXT_ROOT: | |
1069 | { | |
1070 | if (vstack_push(stack)) { | |
1071 | ret = -EINVAL; | |
1072 | goto end; | |
1073 | } | |
1074 | vstack_ax(stack)->type = REG_PTR; | |
1075 | vstack_ax(stack)->load.type = LOAD_ROOT_CONTEXT; | |
1076 | next_pc += sizeof(struct load_op); | |
1077 | break; | |
1078 | } | |
1079 | case FILTER_OP_GET_APP_CONTEXT_ROOT: | |
1080 | { | |
1081 | if (vstack_push(stack)) { | |
1082 | ret = -EINVAL; | |
1083 | goto end; | |
1084 | } | |
1085 | vstack_ax(stack)->type = REG_PTR; | |
1086 | vstack_ax(stack)->load.type = LOAD_ROOT_APP_CONTEXT; | |
1087 | next_pc += sizeof(struct load_op); | |
1088 | break; | |
1089 | } | |
1090 | case FILTER_OP_GET_PAYLOAD_ROOT: | |
1091 | { | |
1092 | if (vstack_push(stack)) { | |
1093 | ret = -EINVAL; | |
1094 | goto end; | |
1095 | } | |
1096 | vstack_ax(stack)->type = REG_PTR; | |
1097 | vstack_ax(stack)->load.type = LOAD_ROOT_PAYLOAD; | |
1098 | next_pc += sizeof(struct load_op); | |
1099 | break; | |
1100 | } | |
1101 | ||
1102 | case FILTER_OP_LOAD_FIELD: | |
1103 | { | |
1104 | struct load_op *insn = (struct load_op *) pc; | |
1105 | ||
1106 | WARN_ON_ONCE(vstack_ax(stack)->type != REG_PTR); | |
1107 | /* Pop 1, push 1 */ | |
1108 | ret = specialize_load_field(vstack_ax(stack), insn); | |
1109 | if (ret) | |
1110 | goto end; | |
1111 | ||
1112 | next_pc += sizeof(struct load_op); | |
1113 | break; | |
1114 | } | |
1115 | ||
1116 | case FILTER_OP_LOAD_FIELD_S8: | |
1117 | case FILTER_OP_LOAD_FIELD_S16: | |
1118 | case FILTER_OP_LOAD_FIELD_S32: | |
1119 | case FILTER_OP_LOAD_FIELD_S64: | |
1120 | case FILTER_OP_LOAD_FIELD_U8: | |
1121 | case FILTER_OP_LOAD_FIELD_U16: | |
1122 | case FILTER_OP_LOAD_FIELD_U32: | |
1123 | case FILTER_OP_LOAD_FIELD_U64: | |
1124 | { | |
1125 | /* Pop 1, push 1 */ | |
1126 | vstack_ax(stack)->type = REG_S64; | |
1127 | next_pc += sizeof(struct load_op); | |
1128 | break; | |
1129 | } | |
1130 | ||
1131 | case FILTER_OP_LOAD_FIELD_STRING: | |
1132 | case FILTER_OP_LOAD_FIELD_SEQUENCE: | |
1133 | { | |
1134 | /* Pop 1, push 1 */ | |
1135 | vstack_ax(stack)->type = REG_STRING; | |
1136 | next_pc += sizeof(struct load_op); | |
1137 | break; | |
1138 | } | |
1139 | ||
1140 | case FILTER_OP_LOAD_FIELD_DOUBLE: | |
1141 | { | |
1142 | /* Pop 1, push 1 */ | |
1143 | vstack_ax(stack)->type = REG_DOUBLE; | |
1144 | next_pc += sizeof(struct load_op); | |
1145 | break; | |
1146 | } | |
1147 | ||
1148 | case FILTER_OP_GET_SYMBOL: | |
1149 | { | |
1150 | struct load_op *insn = (struct load_op *) pc; | |
1151 | ||
1152 | dbg_printk("op get symbol\n"); | |
1153 | switch (vstack_ax(stack)->load.type) { | |
1154 | case LOAD_OBJECT: | |
1155 | printk(KERN_WARNING "Nested fields not implemented yet.\n"); | |
1156 | ret = -EINVAL; | |
1157 | goto end; | |
1158 | case LOAD_ROOT_CONTEXT: | |
1159 | /* Lookup context field. */ | |
1160 | ret = specialize_context_lookup(bytecode, insn, | |
1161 | &vstack_ax(stack)->load); | |
1162 | if (ret) | |
1163 | goto end; | |
1164 | break; | |
1165 | case LOAD_ROOT_APP_CONTEXT: | |
1166 | ret = -EINVAL; | |
1167 | goto end; | |
1168 | case LOAD_ROOT_PAYLOAD: | |
1169 | /* Lookup event payload field. */ | |
1170 | ret = specialize_event_payload_lookup(event, | |
1171 | bytecode, insn, | |
1172 | &vstack_ax(stack)->load); | |
1173 | if (ret) | |
1174 | goto end; | |
1175 | break; | |
1176 | } | |
1177 | next_pc += sizeof(struct load_op) + sizeof(struct get_symbol); | |
1178 | break; | |
1179 | } | |
1180 | ||
1181 | case FILTER_OP_GET_SYMBOL_FIELD: | |
1182 | { | |
1183 | /* Always generated by specialize phase. */ | |
1184 | ret = -EINVAL; | |
1185 | goto end; | |
1186 | } | |
1187 | ||
1188 | case FILTER_OP_GET_INDEX_U16: | |
1189 | { | |
1190 | struct load_op *insn = (struct load_op *) pc; | |
1191 | struct get_index_u16 *index = (struct get_index_u16 *) insn->data; | |
1192 | ||
1193 | dbg_printk("op get index u16\n"); | |
1194 | /* Pop 1, push 1 */ | |
1195 | ret = specialize_get_index(bytecode, insn, index->index, | |
1196 | vstack_ax(stack), sizeof(*index)); | |
1197 | if (ret) | |
1198 | goto end; | |
1199 | next_pc += sizeof(struct load_op) + sizeof(struct get_index_u16); | |
1200 | break; | |
1201 | } | |
1202 | ||
1203 | case FILTER_OP_GET_INDEX_U64: | |
1204 | { | |
1205 | struct load_op *insn = (struct load_op *) pc; | |
1206 | struct get_index_u64 *index = (struct get_index_u64 *) insn->data; | |
1207 | ||
1208 | dbg_printk("op get index u64\n"); | |
1209 | /* Pop 1, push 1 */ | |
1210 | ret = specialize_get_index(bytecode, insn, index->index, | |
1211 | vstack_ax(stack), sizeof(*index)); | |
1212 | if (ret) | |
1213 | goto end; | |
1214 | next_pc += sizeof(struct load_op) + sizeof(struct get_index_u64); | |
1215 | break; | |
1216 | } | |
1217 | ||
07dfc1d0 MD |
1218 | } |
1219 | } | |
1220 | end: | |
1221 | return ret; | |
1222 | } |