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> |
a071f25d | 12 | #include <lttng/align.h> |
07dfc1d0 | 13 | |
3834b99f MD |
14 | static ssize_t bytecode_reserve_data(struct bytecode_runtime *runtime, |
15 | size_t align, size_t len) | |
16 | { | |
17 | ssize_t ret; | |
18 | size_t padding = offset_align(runtime->data_len, align); | |
19 | size_t new_len = runtime->data_len + padding + len; | |
20 | size_t new_alloc_len = new_len; | |
21 | size_t old_alloc_len = runtime->data_alloc_len; | |
22 | ||
23 | if (new_len > FILTER_MAX_DATA_LEN) | |
24 | return -EINVAL; | |
25 | ||
26 | if (new_alloc_len > old_alloc_len) { | |
27 | char *newptr; | |
28 | ||
29 | new_alloc_len = | |
30 | max_t(size_t, 1U << get_count_order(new_alloc_len), old_alloc_len << 1); | |
31 | newptr = krealloc(runtime->data, new_alloc_len, GFP_KERNEL); | |
32 | if (!newptr) | |
33 | return -ENOMEM; | |
34 | runtime->data = newptr; | |
35 | /* We zero directly the memory from start of allocation. */ | |
36 | memset(&runtime->data[old_alloc_len], 0, new_alloc_len - old_alloc_len); | |
37 | runtime->data_alloc_len = new_alloc_len; | |
38 | } | |
39 | runtime->data_len += padding; | |
40 | ret = runtime->data_len; | |
41 | runtime->data_len += len; | |
42 | return ret; | |
43 | } | |
44 | ||
45 | static ssize_t bytecode_push_data(struct bytecode_runtime *runtime, | |
46 | const void *p, size_t align, size_t len) | |
47 | { | |
48 | ssize_t offset; | |
49 | ||
50 | offset = bytecode_reserve_data(runtime, align, len); | |
51 | if (offset < 0) | |
52 | return -ENOMEM; | |
53 | memcpy(&runtime->data[offset], p, len); | |
54 | return offset; | |
55 | } | |
56 | ||
57 | static int specialize_load_field(struct vstack_entry *stack_top, | |
58 | struct load_op *insn) | |
59 | { | |
60 | int ret; | |
61 | ||
62 | switch (stack_top->load.type) { | |
63 | case LOAD_OBJECT: | |
64 | break; | |
65 | case LOAD_ROOT_CONTEXT: | |
66 | case LOAD_ROOT_APP_CONTEXT: | |
67 | case LOAD_ROOT_PAYLOAD: | |
68 | default: | |
69 | dbg_printk("Filter warning: cannot load root, missing field name.\n"); | |
70 | ret = -EINVAL; | |
71 | goto end; | |
72 | } | |
73 | switch (stack_top->load.object_type) { | |
74 | case OBJECT_TYPE_S8: | |
75 | dbg_printk("op load field s8\n"); | |
76 | stack_top->type = REG_S64; | |
77 | if (!stack_top->load.rev_bo) | |
78 | insn->op = FILTER_OP_LOAD_FIELD_S8; | |
79 | break; | |
80 | case OBJECT_TYPE_S16: | |
81 | dbg_printk("op load field s16\n"); | |
82 | stack_top->type = REG_S64; | |
83 | if (!stack_top->load.rev_bo) | |
84 | insn->op = FILTER_OP_LOAD_FIELD_S16; | |
85 | break; | |
86 | case OBJECT_TYPE_S32: | |
87 | dbg_printk("op load field s32\n"); | |
88 | stack_top->type = REG_S64; | |
89 | if (!stack_top->load.rev_bo) | |
90 | insn->op = FILTER_OP_LOAD_FIELD_S32; | |
91 | break; | |
92 | case OBJECT_TYPE_S64: | |
93 | dbg_printk("op load field s64\n"); | |
94 | stack_top->type = REG_S64; | |
95 | if (!stack_top->load.rev_bo) | |
96 | insn->op = FILTER_OP_LOAD_FIELD_S64; | |
97 | break; | |
98 | case OBJECT_TYPE_U8: | |
99 | dbg_printk("op load field u8\n"); | |
100 | stack_top->type = REG_S64; | |
101 | insn->op = FILTER_OP_LOAD_FIELD_U8; | |
102 | break; | |
103 | case OBJECT_TYPE_U16: | |
104 | dbg_printk("op load field u16\n"); | |
105 | stack_top->type = REG_S64; | |
106 | if (!stack_top->load.rev_bo) | |
107 | insn->op = FILTER_OP_LOAD_FIELD_U16; | |
108 | break; | |
109 | case OBJECT_TYPE_U32: | |
110 | dbg_printk("op load field u32\n"); | |
111 | stack_top->type = REG_S64; | |
112 | if (!stack_top->load.rev_bo) | |
113 | insn->op = FILTER_OP_LOAD_FIELD_U32; | |
114 | break; | |
115 | case OBJECT_TYPE_U64: | |
116 | dbg_printk("op load field u64\n"); | |
117 | stack_top->type = REG_S64; | |
118 | if (!stack_top->load.rev_bo) | |
119 | insn->op = FILTER_OP_LOAD_FIELD_U64; | |
120 | break; | |
121 | case OBJECT_TYPE_DOUBLE: | |
122 | printk(KERN_WARNING "Double type unsupported\n\n"); | |
123 | ret = -EINVAL; | |
124 | goto end; | |
125 | case OBJECT_TYPE_STRING: | |
126 | dbg_printk("op load field string\n"); | |
127 | stack_top->type = REG_STRING; | |
128 | insn->op = FILTER_OP_LOAD_FIELD_STRING; | |
129 | break; | |
130 | case OBJECT_TYPE_STRING_SEQUENCE: | |
131 | dbg_printk("op load field string sequence\n"); | |
132 | stack_top->type = REG_STRING; | |
133 | insn->op = FILTER_OP_LOAD_FIELD_SEQUENCE; | |
134 | break; | |
135 | case OBJECT_TYPE_DYNAMIC: | |
136 | ret = -EINVAL; | |
137 | goto end; | |
138 | case OBJECT_TYPE_SEQUENCE: | |
139 | case OBJECT_TYPE_ARRAY: | |
140 | case OBJECT_TYPE_STRUCT: | |
141 | case OBJECT_TYPE_VARIANT: | |
142 | printk(KERN_WARNING "Sequences, arrays, struct and variant cannot be loaded (nested types).\n"); | |
143 | ret = -EINVAL; | |
144 | goto end; | |
145 | } | |
146 | return 0; | |
147 | ||
148 | end: | |
149 | return ret; | |
150 | } | |
151 | ||
152 | static int specialize_get_index_object_type(enum object_type *otype, | |
153 | int signedness, uint32_t elem_len) | |
154 | { | |
155 | switch (elem_len) { | |
156 | case 8: | |
157 | if (signedness) | |
158 | *otype = OBJECT_TYPE_S8; | |
159 | else | |
160 | *otype = OBJECT_TYPE_U8; | |
161 | break; | |
162 | case 16: | |
163 | if (signedness) | |
164 | *otype = OBJECT_TYPE_S16; | |
165 | else | |
166 | *otype = OBJECT_TYPE_U16; | |
167 | break; | |
168 | case 32: | |
169 | if (signedness) | |
170 | *otype = OBJECT_TYPE_S32; | |
171 | else | |
172 | *otype = OBJECT_TYPE_U32; | |
173 | break; | |
174 | case 64: | |
175 | if (signedness) | |
176 | *otype = OBJECT_TYPE_S64; | |
177 | else | |
178 | *otype = OBJECT_TYPE_U64; | |
179 | break; | |
180 | default: | |
181 | return -EINVAL; | |
182 | } | |
183 | return 0; | |
184 | } | |
185 | ||
186 | static int specialize_get_index(struct bytecode_runtime *runtime, | |
187 | struct load_op *insn, uint64_t index, | |
188 | struct vstack_entry *stack_top, | |
189 | int idx_len) | |
190 | { | |
191 | int ret; | |
192 | struct filter_get_index_data gid; | |
193 | ssize_t data_offset; | |
194 | ||
195 | memset(&gid, 0, sizeof(gid)); | |
196 | switch (stack_top->load.type) { | |
197 | case LOAD_OBJECT: | |
198 | switch (stack_top->load.object_type) { | |
199 | case OBJECT_TYPE_ARRAY: | |
200 | { | |
ceabb767 | 201 | const struct lttng_integer_type *integer_type; |
3834b99f MD |
202 | const struct lttng_event_field *field; |
203 | uint32_t elem_len, num_elems; | |
204 | int signedness; | |
205 | ||
206 | field = stack_top->load.field; | |
ceabb767 MD |
207 | if (!lttng_is_bytewise_integer(field->type.u.array_nestable.elem_type)) { |
208 | ret = -EINVAL; | |
209 | goto end; | |
210 | } | |
211 | integer_type = &field->type.u.array_nestable.elem_type->u.integer; | |
212 | num_elems = field->type.u.array_nestable.length; | |
213 | elem_len = integer_type->size; | |
214 | signedness = integer_type->signedness; | |
3834b99f MD |
215 | if (index >= num_elems) { |
216 | ret = -EINVAL; | |
217 | goto end; | |
218 | } | |
219 | ret = specialize_get_index_object_type(&stack_top->load.object_type, | |
220 | signedness, elem_len); | |
221 | if (ret) | |
222 | goto end; | |
223 | gid.offset = index * (elem_len / CHAR_BIT); | |
224 | gid.array_len = num_elems * (elem_len / CHAR_BIT); | |
225 | gid.elem.type = stack_top->load.object_type; | |
226 | gid.elem.len = elem_len; | |
ceabb767 | 227 | if (integer_type->reverse_byte_order) |
3834b99f MD |
228 | gid.elem.rev_bo = true; |
229 | stack_top->load.rev_bo = gid.elem.rev_bo; | |
230 | break; | |
231 | } | |
232 | case OBJECT_TYPE_SEQUENCE: | |
233 | { | |
ceabb767 | 234 | const struct lttng_integer_type *integer_type; |
3834b99f MD |
235 | const struct lttng_event_field *field; |
236 | uint32_t elem_len; | |
237 | int signedness; | |
238 | ||
239 | field = stack_top->load.field; | |
ceabb767 MD |
240 | if (!lttng_is_bytewise_integer(field->type.u.sequence_nestable.elem_type)) { |
241 | ret = -EINVAL; | |
242 | goto end; | |
243 | } | |
244 | integer_type = &field->type.u.sequence_nestable.elem_type->u.integer; | |
245 | elem_len = integer_type->size; | |
246 | signedness = integer_type->signedness; | |
3834b99f MD |
247 | ret = specialize_get_index_object_type(&stack_top->load.object_type, |
248 | signedness, elem_len); | |
249 | if (ret) | |
250 | goto end; | |
251 | gid.offset = index * (elem_len / CHAR_BIT); | |
252 | gid.elem.type = stack_top->load.object_type; | |
253 | gid.elem.len = elem_len; | |
ceabb767 | 254 | if (integer_type->reverse_byte_order) |
3834b99f MD |
255 | gid.elem.rev_bo = true; |
256 | stack_top->load.rev_bo = gid.elem.rev_bo; | |
257 | break; | |
258 | } | |
259 | case OBJECT_TYPE_STRUCT: | |
260 | /* Only generated by the specialize phase. */ | |
261 | case OBJECT_TYPE_VARIANT: /* Fall-through */ | |
262 | default: | |
263 | printk(KERN_WARNING "Unexpected get index type %d", | |
264 | (int) stack_top->load.object_type); | |
265 | ret = -EINVAL; | |
266 | goto end; | |
267 | } | |
268 | break; | |
269 | case LOAD_ROOT_CONTEXT: | |
270 | case LOAD_ROOT_APP_CONTEXT: | |
271 | case LOAD_ROOT_PAYLOAD: | |
272 | printk(KERN_WARNING "Index lookup for root field not implemented yet.\n"); | |
273 | ret = -EINVAL; | |
274 | goto end; | |
275 | } | |
276 | data_offset = bytecode_push_data(runtime, &gid, | |
277 | __alignof__(gid), sizeof(gid)); | |
278 | if (data_offset < 0) { | |
279 | ret = -EINVAL; | |
280 | goto end; | |
281 | } | |
282 | switch (idx_len) { | |
283 | case 2: | |
284 | ((struct get_index_u16 *) insn->data)->index = data_offset; | |
285 | break; | |
286 | case 8: | |
287 | ((struct get_index_u64 *) insn->data)->index = data_offset; | |
288 | break; | |
289 | default: | |
290 | ret = -EINVAL; | |
291 | goto end; | |
292 | } | |
293 | ||
294 | return 0; | |
295 | ||
296 | end: | |
297 | return ret; | |
298 | } | |
299 | ||
300 | static int specialize_context_lookup_name(struct bytecode_runtime *bytecode, | |
301 | struct load_op *insn) | |
302 | { | |
303 | uint16_t offset; | |
304 | const char *name; | |
305 | ||
306 | offset = ((struct get_symbol *) insn->data)->offset; | |
307 | name = bytecode->p.bc->bc.data + bytecode->p.bc->bc.reloc_offset + offset; | |
308 | return lttng_get_context_index(lttng_static_ctx, name); | |
309 | } | |
310 | ||
311 | static int specialize_load_object(const struct lttng_event_field *field, | |
312 | struct vstack_load *load, bool is_context) | |
313 | { | |
314 | load->type = LOAD_OBJECT; | |
315 | /* | |
316 | * LTTng-UST layout all integer fields as s64 on the stack for the filter. | |
317 | */ | |
318 | switch (field->type.atype) { | |
319 | case atype_integer: | |
ceabb767 | 320 | if (field->type.u.integer.signedness) |
3834b99f MD |
321 | load->object_type = OBJECT_TYPE_S64; |
322 | else | |
323 | load->object_type = OBJECT_TYPE_U64; | |
324 | load->rev_bo = false; | |
325 | break; | |
ceabb767 | 326 | case atype_enum_nestable: |
3834b99f MD |
327 | { |
328 | const struct lttng_integer_type *itype = | |
ceabb767 | 329 | &field->type.u.enum_nestable.container_type->u.integer; |
3834b99f MD |
330 | |
331 | if (itype->signedness) | |
332 | load->object_type = OBJECT_TYPE_S64; | |
333 | else | |
334 | load->object_type = OBJECT_TYPE_U64; | |
335 | load->rev_bo = false; | |
336 | break; | |
337 | } | |
ceabb767 MD |
338 | case atype_array_nestable: |
339 | if (!lttng_is_bytewise_integer(field->type.u.array_nestable.elem_type)) { | |
3834b99f MD |
340 | printk(KERN_WARNING "Array nesting only supports integer types.\n"); |
341 | return -EINVAL; | |
342 | } | |
343 | if (is_context) { | |
344 | load->object_type = OBJECT_TYPE_STRING; | |
345 | } else { | |
ceabb767 | 346 | if (field->type.u.array_nestable.elem_type->u.integer.encoding == lttng_encode_none) { |
3834b99f MD |
347 | load->object_type = OBJECT_TYPE_ARRAY; |
348 | load->field = field; | |
349 | } else { | |
350 | load->object_type = OBJECT_TYPE_STRING_SEQUENCE; | |
351 | } | |
352 | } | |
353 | break; | |
ceabb767 MD |
354 | case atype_sequence_nestable: |
355 | if (!lttng_is_bytewise_integer(field->type.u.sequence_nestable.elem_type)) { | |
3834b99f MD |
356 | printk(KERN_WARNING "Sequence nesting only supports integer types.\n"); |
357 | return -EINVAL; | |
358 | } | |
359 | if (is_context) { | |
360 | load->object_type = OBJECT_TYPE_STRING; | |
361 | } else { | |
ceabb767 | 362 | if (field->type.u.sequence_nestable.elem_type->u.integer.encoding == lttng_encode_none) { |
3834b99f MD |
363 | load->object_type = OBJECT_TYPE_SEQUENCE; |
364 | load->field = field; | |
365 | } else { | |
366 | load->object_type = OBJECT_TYPE_STRING_SEQUENCE; | |
367 | } | |
368 | } | |
369 | break; | |
3834b99f MD |
370 | case atype_string: |
371 | load->object_type = OBJECT_TYPE_STRING; | |
372 | break; | |
ceabb767 | 373 | case atype_struct_nestable: |
3834b99f MD |
374 | printk(KERN_WARNING "Structure type cannot be loaded.\n"); |
375 | return -EINVAL; | |
ceabb767 MD |
376 | case atype_variant_nestable: |
377 | printk(KERN_WARNING "Variant type cannot be loaded.\n"); | |
378 | return -EINVAL; | |
3834b99f MD |
379 | default: |
380 | printk(KERN_WARNING "Unknown type: %d", (int) field->type.atype); | |
381 | return -EINVAL; | |
382 | } | |
383 | return 0; | |
384 | } | |
385 | ||
386 | static int specialize_context_lookup(struct bytecode_runtime *runtime, | |
387 | struct load_op *insn, | |
388 | struct vstack_load *load) | |
389 | { | |
390 | int idx, ret; | |
391 | struct lttng_ctx_field *ctx_field; | |
392 | struct lttng_event_field *field; | |
393 | struct filter_get_index_data gid; | |
394 | ssize_t data_offset; | |
395 | ||
396 | idx = specialize_context_lookup_name(runtime, insn); | |
397 | if (idx < 0) { | |
398 | return -ENOENT; | |
399 | } | |
400 | ctx_field = <tng_static_ctx->fields[idx]; | |
401 | field = &ctx_field->event_field; | |
402 | ret = specialize_load_object(field, load, true); | |
403 | if (ret) | |
404 | return ret; | |
405 | /* Specialize each get_symbol into a get_index. */ | |
406 | insn->op = FILTER_OP_GET_INDEX_U16; | |
407 | memset(&gid, 0, sizeof(gid)); | |
408 | gid.ctx_index = idx; | |
409 | gid.elem.type = load->object_type; | |
410 | data_offset = bytecode_push_data(runtime, &gid, | |
411 | __alignof__(gid), sizeof(gid)); | |
412 | if (data_offset < 0) { | |
413 | return -EINVAL; | |
414 | } | |
415 | ((struct get_index_u16 *) insn->data)->index = data_offset; | |
416 | return 0; | |
417 | } | |
418 | ||
419 | static int specialize_event_payload_lookup(struct lttng_event *event, | |
420 | struct bytecode_runtime *runtime, | |
421 | struct load_op *insn, | |
422 | struct vstack_load *load) | |
423 | { | |
424 | const char *name; | |
425 | uint16_t offset; | |
426 | const struct lttng_event_desc *desc = event->desc; | |
427 | unsigned int i, nr_fields; | |
428 | bool found = false; | |
429 | uint32_t field_offset = 0; | |
430 | const struct lttng_event_field *field; | |
431 | int ret; | |
432 | struct filter_get_index_data gid; | |
433 | ssize_t data_offset; | |
434 | ||
435 | nr_fields = desc->nr_fields; | |
436 | offset = ((struct get_symbol *) insn->data)->offset; | |
437 | name = runtime->p.bc->bc.data + runtime->p.bc->bc.reloc_offset + offset; | |
438 | for (i = 0; i < nr_fields; i++) { | |
439 | field = &desc->fields[i]; | |
ceabb767 MD |
440 | if (field->nofilter) { |
441 | continue; | |
442 | } | |
3834b99f MD |
443 | if (!strcmp(field->name, name)) { |
444 | found = true; | |
445 | break; | |
446 | } | |
447 | /* compute field offset on stack */ | |
448 | switch (field->type.atype) { | |
449 | case atype_integer: | |
ceabb767 | 450 | case atype_enum_nestable: |
3834b99f MD |
451 | field_offset += sizeof(int64_t); |
452 | break; | |
ceabb767 MD |
453 | case atype_array_nestable: |
454 | case atype_sequence_nestable: | |
3834b99f MD |
455 | field_offset += sizeof(unsigned long); |
456 | field_offset += sizeof(void *); | |
457 | break; | |
458 | case atype_string: | |
459 | field_offset += sizeof(void *); | |
460 | break; | |
461 | default: | |
462 | ret = -EINVAL; | |
463 | goto end; | |
464 | } | |
465 | } | |
466 | if (!found) { | |
467 | ret = -EINVAL; | |
468 | goto end; | |
469 | } | |
470 | ||
471 | ret = specialize_load_object(field, load, false); | |
472 | if (ret) | |
473 | goto end; | |
474 | ||
475 | /* Specialize each get_symbol into a get_index. */ | |
476 | insn->op = FILTER_OP_GET_INDEX_U16; | |
477 | memset(&gid, 0, sizeof(gid)); | |
478 | gid.offset = field_offset; | |
479 | gid.elem.type = load->object_type; | |
480 | data_offset = bytecode_push_data(runtime, &gid, | |
481 | __alignof__(gid), sizeof(gid)); | |
482 | if (data_offset < 0) { | |
483 | ret = -EINVAL; | |
484 | goto end; | |
485 | } | |
486 | ((struct get_index_u16 *) insn->data)->index = data_offset; | |
487 | ret = 0; | |
488 | end: | |
489 | return ret; | |
490 | } | |
491 | ||
492 | int lttng_filter_specialize_bytecode(struct lttng_event *event, | |
493 | struct bytecode_runtime *bytecode) | |
07dfc1d0 MD |
494 | { |
495 | void *pc, *next_pc, *start_pc; | |
496 | int ret = -EINVAL; | |
497 | struct vstack _stack; | |
498 | struct vstack *stack = &_stack; | |
499 | ||
500 | vstack_init(stack); | |
501 | ||
3834b99f | 502 | start_pc = &bytecode->code[0]; |
07dfc1d0 MD |
503 | for (pc = next_pc = start_pc; pc - start_pc < bytecode->len; |
504 | pc = next_pc) { | |
505 | switch (*(filter_opcode_t *) pc) { | |
506 | case FILTER_OP_UNKNOWN: | |
507 | default: | |
508 | printk(KERN_WARNING "unknown bytecode op %u\n", | |
509 | (unsigned int) *(filter_opcode_t *) pc); | |
510 | ret = -EINVAL; | |
511 | goto end; | |
512 | ||
513 | case FILTER_OP_RETURN: | |
57ba4b41 | 514 | case FILTER_OP_RETURN_S64: |
07dfc1d0 MD |
515 | ret = 0; |
516 | goto end; | |
517 | ||
518 | /* binary */ | |
519 | case FILTER_OP_MUL: | |
520 | case FILTER_OP_DIV: | |
521 | case FILTER_OP_MOD: | |
522 | case FILTER_OP_PLUS: | |
523 | case FILTER_OP_MINUS: | |
07dfc1d0 MD |
524 | printk(KERN_WARNING "unsupported bytecode op %u\n", |
525 | (unsigned int) *(filter_opcode_t *) pc); | |
526 | ret = -EINVAL; | |
527 | goto end; | |
528 | ||
529 | case FILTER_OP_EQ: | |
530 | { | |
531 | struct binary_op *insn = (struct binary_op *) pc; | |
532 | ||
533 | switch(vstack_ax(stack)->type) { | |
534 | default: | |
535 | printk(KERN_WARNING "unknown register type\n"); | |
536 | ret = -EINVAL; | |
537 | goto end; | |
538 | ||
539 | case REG_STRING: | |
02aca193 PP |
540 | if (vstack_bx(stack)->type == REG_STAR_GLOB_STRING) |
541 | insn->op = FILTER_OP_EQ_STAR_GLOB_STRING; | |
542 | else | |
543 | insn->op = FILTER_OP_EQ_STRING; | |
544 | break; | |
545 | case REG_STAR_GLOB_STRING: | |
546 | insn->op = FILTER_OP_EQ_STAR_GLOB_STRING; | |
07dfc1d0 MD |
547 | break; |
548 | case REG_S64: | |
549 | if (vstack_bx(stack)->type == REG_S64) | |
550 | insn->op = FILTER_OP_EQ_S64; | |
551 | else | |
552 | insn->op = FILTER_OP_EQ_DOUBLE_S64; | |
553 | break; | |
554 | case REG_DOUBLE: | |
555 | if (vstack_bx(stack)->type == REG_S64) | |
556 | insn->op = FILTER_OP_EQ_S64_DOUBLE; | |
557 | else | |
558 | insn->op = FILTER_OP_EQ_DOUBLE; | |
559 | break; | |
560 | } | |
561 | /* Pop 2, push 1 */ | |
562 | if (vstack_pop(stack)) { | |
563 | ret = -EINVAL; | |
564 | goto end; | |
565 | } | |
566 | vstack_ax(stack)->type = REG_S64; | |
567 | next_pc += sizeof(struct binary_op); | |
568 | break; | |
569 | } | |
570 | ||
571 | case FILTER_OP_NE: | |
572 | { | |
573 | struct binary_op *insn = (struct binary_op *) pc; | |
574 | ||
575 | switch(vstack_ax(stack)->type) { | |
576 | default: | |
577 | printk(KERN_WARNING "unknown register type\n"); | |
578 | ret = -EINVAL; | |
579 | goto end; | |
580 | ||
581 | case REG_STRING: | |
02aca193 PP |
582 | if (vstack_bx(stack)->type == REG_STAR_GLOB_STRING) |
583 | insn->op = FILTER_OP_NE_STAR_GLOB_STRING; | |
584 | else | |
585 | insn->op = FILTER_OP_NE_STRING; | |
586 | break; | |
587 | case REG_STAR_GLOB_STRING: | |
588 | insn->op = FILTER_OP_NE_STAR_GLOB_STRING; | |
07dfc1d0 MD |
589 | break; |
590 | case REG_S64: | |
591 | if (vstack_bx(stack)->type == REG_S64) | |
592 | insn->op = FILTER_OP_NE_S64; | |
593 | else | |
594 | insn->op = FILTER_OP_NE_DOUBLE_S64; | |
595 | break; | |
596 | case REG_DOUBLE: | |
597 | if (vstack_bx(stack)->type == REG_S64) | |
598 | insn->op = FILTER_OP_NE_S64_DOUBLE; | |
599 | else | |
600 | insn->op = FILTER_OP_NE_DOUBLE; | |
601 | break; | |
602 | } | |
603 | /* Pop 2, push 1 */ | |
604 | if (vstack_pop(stack)) { | |
605 | ret = -EINVAL; | |
606 | goto end; | |
607 | } | |
608 | vstack_ax(stack)->type = REG_S64; | |
609 | next_pc += sizeof(struct binary_op); | |
610 | break; | |
611 | } | |
612 | ||
613 | case FILTER_OP_GT: | |
614 | { | |
615 | struct binary_op *insn = (struct binary_op *) pc; | |
616 | ||
617 | switch(vstack_ax(stack)->type) { | |
618 | default: | |
619 | printk(KERN_WARNING "unknown register type\n"); | |
620 | ret = -EINVAL; | |
621 | goto end; | |
622 | ||
02aca193 PP |
623 | case REG_STAR_GLOB_STRING: |
624 | printk(KERN_WARNING "invalid register type for > binary operator\n"); | |
625 | ret = -EINVAL; | |
626 | goto end; | |
07dfc1d0 MD |
627 | case REG_STRING: |
628 | insn->op = FILTER_OP_GT_STRING; | |
629 | break; | |
630 | case REG_S64: | |
631 | if (vstack_bx(stack)->type == REG_S64) | |
632 | insn->op = FILTER_OP_GT_S64; | |
633 | else | |
634 | insn->op = FILTER_OP_GT_DOUBLE_S64; | |
635 | break; | |
636 | case REG_DOUBLE: | |
637 | if (vstack_bx(stack)->type == REG_S64) | |
638 | insn->op = FILTER_OP_GT_S64_DOUBLE; | |
639 | else | |
640 | insn->op = FILTER_OP_GT_DOUBLE; | |
641 | break; | |
642 | } | |
643 | /* Pop 2, push 1 */ | |
644 | if (vstack_pop(stack)) { | |
645 | ret = -EINVAL; | |
646 | goto end; | |
647 | } | |
648 | vstack_ax(stack)->type = REG_S64; | |
649 | next_pc += sizeof(struct binary_op); | |
650 | break; | |
651 | } | |
652 | ||
653 | case FILTER_OP_LT: | |
654 | { | |
655 | struct binary_op *insn = (struct binary_op *) pc; | |
656 | ||
657 | switch(vstack_ax(stack)->type) { | |
658 | default: | |
659 | printk(KERN_WARNING "unknown register type\n"); | |
660 | ret = -EINVAL; | |
661 | goto end; | |
662 | ||
02aca193 PP |
663 | case REG_STAR_GLOB_STRING: |
664 | printk(KERN_WARNING "invalid register type for < binary operator\n"); | |
665 | ret = -EINVAL; | |
666 | goto end; | |
07dfc1d0 MD |
667 | case REG_STRING: |
668 | insn->op = FILTER_OP_LT_STRING; | |
669 | break; | |
670 | case REG_S64: | |
671 | if (vstack_bx(stack)->type == REG_S64) | |
672 | insn->op = FILTER_OP_LT_S64; | |
673 | else | |
674 | insn->op = FILTER_OP_LT_DOUBLE_S64; | |
675 | break; | |
676 | case REG_DOUBLE: | |
677 | if (vstack_bx(stack)->type == REG_S64) | |
678 | insn->op = FILTER_OP_LT_S64_DOUBLE; | |
679 | else | |
680 | insn->op = FILTER_OP_LT_DOUBLE; | |
681 | break; | |
682 | } | |
683 | /* Pop 2, push 1 */ | |
684 | if (vstack_pop(stack)) { | |
685 | ret = -EINVAL; | |
686 | goto end; | |
687 | } | |
688 | vstack_ax(stack)->type = REG_S64; | |
689 | next_pc += sizeof(struct binary_op); | |
690 | break; | |
691 | } | |
692 | ||
693 | case FILTER_OP_GE: | |
694 | { | |
695 | struct binary_op *insn = (struct binary_op *) pc; | |
696 | ||
697 | switch(vstack_ax(stack)->type) { | |
698 | default: | |
699 | printk(KERN_WARNING "unknown register type\n"); | |
700 | ret = -EINVAL; | |
701 | goto end; | |
702 | ||
02aca193 PP |
703 | case REG_STAR_GLOB_STRING: |
704 | printk(KERN_WARNING "invalid register type for >= binary operator\n"); | |
705 | ret = -EINVAL; | |
706 | goto end; | |
07dfc1d0 MD |
707 | case REG_STRING: |
708 | insn->op = FILTER_OP_GE_STRING; | |
709 | break; | |
710 | case REG_S64: | |
711 | if (vstack_bx(stack)->type == REG_S64) | |
712 | insn->op = FILTER_OP_GE_S64; | |
713 | else | |
714 | insn->op = FILTER_OP_GE_DOUBLE_S64; | |
715 | break; | |
716 | case REG_DOUBLE: | |
717 | if (vstack_bx(stack)->type == REG_S64) | |
718 | insn->op = FILTER_OP_GE_S64_DOUBLE; | |
719 | else | |
720 | insn->op = FILTER_OP_GE_DOUBLE; | |
721 | break; | |
722 | } | |
723 | /* Pop 2, push 1 */ | |
724 | if (vstack_pop(stack)) { | |
725 | ret = -EINVAL; | |
726 | goto end; | |
727 | } | |
728 | vstack_ax(stack)->type = REG_S64; | |
729 | next_pc += sizeof(struct binary_op); | |
730 | break; | |
731 | } | |
732 | case FILTER_OP_LE: | |
733 | { | |
734 | struct binary_op *insn = (struct binary_op *) pc; | |
735 | ||
736 | switch(vstack_ax(stack)->type) { | |
737 | default: | |
738 | printk(KERN_WARNING "unknown register type\n"); | |
739 | ret = -EINVAL; | |
740 | goto end; | |
741 | ||
02aca193 PP |
742 | case REG_STAR_GLOB_STRING: |
743 | printk(KERN_WARNING "invalid register type for <= binary operator\n"); | |
744 | ret = -EINVAL; | |
745 | goto end; | |
07dfc1d0 MD |
746 | case REG_STRING: |
747 | insn->op = FILTER_OP_LE_STRING; | |
748 | break; | |
749 | case REG_S64: | |
750 | if (vstack_bx(stack)->type == REG_S64) | |
751 | insn->op = FILTER_OP_LE_S64; | |
752 | else | |
753 | insn->op = FILTER_OP_LE_DOUBLE_S64; | |
754 | break; | |
755 | case REG_DOUBLE: | |
756 | if (vstack_bx(stack)->type == REG_S64) | |
757 | insn->op = FILTER_OP_LE_S64_DOUBLE; | |
758 | else | |
759 | insn->op = FILTER_OP_LE_DOUBLE; | |
760 | break; | |
761 | } | |
762 | vstack_ax(stack)->type = REG_S64; | |
763 | next_pc += sizeof(struct binary_op); | |
764 | break; | |
765 | } | |
766 | ||
767 | case FILTER_OP_EQ_STRING: | |
768 | case FILTER_OP_NE_STRING: | |
769 | case FILTER_OP_GT_STRING: | |
770 | case FILTER_OP_LT_STRING: | |
771 | case FILTER_OP_GE_STRING: | |
772 | case FILTER_OP_LE_STRING: | |
02aca193 PP |
773 | case FILTER_OP_EQ_STAR_GLOB_STRING: |
774 | case FILTER_OP_NE_STAR_GLOB_STRING: | |
07dfc1d0 MD |
775 | case FILTER_OP_EQ_S64: |
776 | case FILTER_OP_NE_S64: | |
777 | case FILTER_OP_GT_S64: | |
778 | case FILTER_OP_LT_S64: | |
779 | case FILTER_OP_GE_S64: | |
780 | case FILTER_OP_LE_S64: | |
781 | case FILTER_OP_EQ_DOUBLE: | |
782 | case FILTER_OP_NE_DOUBLE: | |
783 | case FILTER_OP_GT_DOUBLE: | |
784 | case FILTER_OP_LT_DOUBLE: | |
785 | case FILTER_OP_GE_DOUBLE: | |
786 | case FILTER_OP_LE_DOUBLE: | |
787 | case FILTER_OP_EQ_DOUBLE_S64: | |
788 | case FILTER_OP_NE_DOUBLE_S64: | |
789 | case FILTER_OP_GT_DOUBLE_S64: | |
790 | case FILTER_OP_LT_DOUBLE_S64: | |
791 | case FILTER_OP_GE_DOUBLE_S64: | |
792 | case FILTER_OP_LE_DOUBLE_S64: | |
793 | case FILTER_OP_EQ_S64_DOUBLE: | |
794 | case FILTER_OP_NE_S64_DOUBLE: | |
795 | case FILTER_OP_GT_S64_DOUBLE: | |
796 | case FILTER_OP_LT_S64_DOUBLE: | |
797 | case FILTER_OP_GE_S64_DOUBLE: | |
798 | case FILTER_OP_LE_S64_DOUBLE: | |
e16c054b MD |
799 | case FILTER_OP_BIT_RSHIFT: |
800 | case FILTER_OP_BIT_LSHIFT: | |
3834b99f MD |
801 | case FILTER_OP_BIT_AND: |
802 | case FILTER_OP_BIT_OR: | |
803 | case FILTER_OP_BIT_XOR: | |
07dfc1d0 MD |
804 | { |
805 | /* Pop 2, push 1 */ | |
806 | if (vstack_pop(stack)) { | |
807 | ret = -EINVAL; | |
808 | goto end; | |
809 | } | |
810 | vstack_ax(stack)->type = REG_S64; | |
811 | next_pc += sizeof(struct binary_op); | |
812 | break; | |
813 | } | |
814 | ||
815 | /* unary */ | |
816 | case FILTER_OP_UNARY_PLUS: | |
817 | { | |
818 | struct unary_op *insn = (struct unary_op *) pc; | |
819 | ||
820 | switch(vstack_ax(stack)->type) { | |
821 | default: | |
822 | printk(KERN_WARNING "unknown register type\n"); | |
823 | ret = -EINVAL; | |
824 | goto end; | |
825 | ||
826 | case REG_S64: | |
827 | insn->op = FILTER_OP_UNARY_PLUS_S64; | |
828 | break; | |
829 | case REG_DOUBLE: | |
830 | insn->op = FILTER_OP_UNARY_PLUS_DOUBLE; | |
831 | break; | |
832 | } | |
833 | /* Pop 1, push 1 */ | |
834 | next_pc += sizeof(struct unary_op); | |
835 | break; | |
836 | } | |
837 | ||
838 | case FILTER_OP_UNARY_MINUS: | |
839 | { | |
840 | struct unary_op *insn = (struct unary_op *) pc; | |
841 | ||
842 | switch(vstack_ax(stack)->type) { | |
843 | default: | |
844 | printk(KERN_WARNING "unknown register type\n"); | |
845 | ret = -EINVAL; | |
846 | goto end; | |
847 | ||
848 | case REG_S64: | |
849 | insn->op = FILTER_OP_UNARY_MINUS_S64; | |
850 | break; | |
851 | case REG_DOUBLE: | |
852 | insn->op = FILTER_OP_UNARY_MINUS_DOUBLE; | |
853 | break; | |
854 | } | |
855 | /* Pop 1, push 1 */ | |
856 | next_pc += sizeof(struct unary_op); | |
857 | break; | |
858 | } | |
859 | ||
860 | case FILTER_OP_UNARY_NOT: | |
861 | { | |
862 | struct unary_op *insn = (struct unary_op *) pc; | |
863 | ||
864 | switch(vstack_ax(stack)->type) { | |
865 | default: | |
866 | printk(KERN_WARNING "unknown register type\n"); | |
867 | ret = -EINVAL; | |
868 | goto end; | |
869 | ||
870 | case REG_S64: | |
871 | insn->op = FILTER_OP_UNARY_NOT_S64; | |
872 | break; | |
873 | case REG_DOUBLE: | |
874 | insn->op = FILTER_OP_UNARY_NOT_DOUBLE; | |
875 | break; | |
876 | } | |
877 | /* Pop 1, push 1 */ | |
878 | next_pc += sizeof(struct unary_op); | |
879 | break; | |
880 | } | |
881 | ||
e16c054b MD |
882 | case FILTER_OP_UNARY_BIT_NOT: |
883 | { | |
884 | /* Pop 1, push 1 */ | |
885 | next_pc += sizeof(struct unary_op); | |
886 | break; | |
887 | } | |
888 | ||
07dfc1d0 MD |
889 | case FILTER_OP_UNARY_PLUS_S64: |
890 | case FILTER_OP_UNARY_MINUS_S64: | |
891 | case FILTER_OP_UNARY_NOT_S64: | |
892 | case FILTER_OP_UNARY_PLUS_DOUBLE: | |
893 | case FILTER_OP_UNARY_MINUS_DOUBLE: | |
894 | case FILTER_OP_UNARY_NOT_DOUBLE: | |
895 | { | |
896 | /* Pop 1, push 1 */ | |
897 | next_pc += sizeof(struct unary_op); | |
898 | break; | |
899 | } | |
900 | ||
901 | /* logical */ | |
902 | case FILTER_OP_AND: | |
903 | case FILTER_OP_OR: | |
904 | { | |
905 | /* Continue to next instruction */ | |
906 | /* Pop 1 when jump not taken */ | |
907 | if (vstack_pop(stack)) { | |
908 | ret = -EINVAL; | |
909 | goto end; | |
910 | } | |
911 | next_pc += sizeof(struct logical_op); | |
912 | break; | |
913 | } | |
914 | ||
915 | /* load field ref */ | |
916 | case FILTER_OP_LOAD_FIELD_REF: | |
917 | { | |
918 | printk(KERN_WARNING "Unknown field ref type\n"); | |
919 | ret = -EINVAL; | |
920 | goto end; | |
921 | } | |
922 | /* get context ref */ | |
923 | case FILTER_OP_GET_CONTEXT_REF: | |
924 | { | |
925 | printk(KERN_WARNING "Unknown get context ref type\n"); | |
926 | ret = -EINVAL; | |
927 | goto end; | |
928 | } | |
929 | case FILTER_OP_LOAD_FIELD_REF_STRING: | |
930 | case FILTER_OP_LOAD_FIELD_REF_SEQUENCE: | |
931 | case FILTER_OP_GET_CONTEXT_REF_STRING: | |
f127e61e MD |
932 | case FILTER_OP_LOAD_FIELD_REF_USER_STRING: |
933 | case FILTER_OP_LOAD_FIELD_REF_USER_SEQUENCE: | |
07dfc1d0 MD |
934 | { |
935 | if (vstack_push(stack)) { | |
936 | ret = -EINVAL; | |
937 | goto end; | |
938 | } | |
939 | vstack_ax(stack)->type = REG_STRING; | |
940 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
941 | break; | |
942 | } | |
943 | case FILTER_OP_LOAD_FIELD_REF_S64: | |
944 | case FILTER_OP_GET_CONTEXT_REF_S64: | |
945 | { | |
946 | if (vstack_push(stack)) { | |
947 | ret = -EINVAL; | |
948 | goto end; | |
949 | } | |
950 | vstack_ax(stack)->type = REG_S64; | |
951 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
952 | break; | |
953 | } | |
954 | case FILTER_OP_LOAD_FIELD_REF_DOUBLE: | |
955 | case FILTER_OP_GET_CONTEXT_REF_DOUBLE: | |
956 | { | |
957 | if (vstack_push(stack)) { | |
958 | ret = -EINVAL; | |
959 | goto end; | |
960 | } | |
961 | vstack_ax(stack)->type = REG_DOUBLE; | |
962 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
963 | break; | |
964 | } | |
965 | ||
966 | /* load from immediate operand */ | |
967 | case FILTER_OP_LOAD_STRING: | |
968 | { | |
969 | struct load_op *insn = (struct load_op *) pc; | |
970 | ||
971 | if (vstack_push(stack)) { | |
972 | ret = -EINVAL; | |
973 | goto end; | |
974 | } | |
975 | vstack_ax(stack)->type = REG_STRING; | |
976 | next_pc += sizeof(struct load_op) + strlen(insn->data) + 1; | |
977 | break; | |
978 | } | |
979 | ||
02aca193 PP |
980 | case FILTER_OP_LOAD_STAR_GLOB_STRING: |
981 | { | |
982 | struct load_op *insn = (struct load_op *) pc; | |
983 | ||
984 | if (vstack_push(stack)) { | |
985 | ret = -EINVAL; | |
986 | goto end; | |
987 | } | |
988 | vstack_ax(stack)->type = REG_STAR_GLOB_STRING; | |
989 | next_pc += sizeof(struct load_op) + strlen(insn->data) + 1; | |
990 | break; | |
991 | } | |
992 | ||
07dfc1d0 MD |
993 | case FILTER_OP_LOAD_S64: |
994 | { | |
995 | if (vstack_push(stack)) { | |
996 | ret = -EINVAL; | |
997 | goto end; | |
998 | } | |
999 | vstack_ax(stack)->type = REG_S64; | |
1000 | next_pc += sizeof(struct load_op) | |
1001 | + sizeof(struct literal_numeric); | |
1002 | break; | |
1003 | } | |
1004 | ||
1005 | case FILTER_OP_LOAD_DOUBLE: | |
1006 | { | |
1007 | if (vstack_push(stack)) { | |
1008 | ret = -EINVAL; | |
1009 | goto end; | |
1010 | } | |
1011 | vstack_ax(stack)->type = REG_DOUBLE; | |
1012 | next_pc += sizeof(struct load_op) | |
1013 | + sizeof(struct literal_double); | |
1014 | break; | |
1015 | } | |
1016 | ||
1017 | /* cast */ | |
1018 | case FILTER_OP_CAST_TO_S64: | |
1019 | { | |
1020 | struct cast_op *insn = (struct cast_op *) pc; | |
1021 | ||
1022 | switch (vstack_ax(stack)->type) { | |
1023 | default: | |
1024 | printk(KERN_WARNING "unknown register type\n"); | |
1025 | ret = -EINVAL; | |
1026 | goto end; | |
1027 | ||
1028 | case REG_STRING: | |
02aca193 | 1029 | case REG_STAR_GLOB_STRING: |
07dfc1d0 MD |
1030 | printk(KERN_WARNING "Cast op can only be applied to numeric or floating point registers\n"); |
1031 | ret = -EINVAL; | |
1032 | goto end; | |
1033 | case REG_S64: | |
1034 | insn->op = FILTER_OP_CAST_NOP; | |
1035 | break; | |
1036 | case REG_DOUBLE: | |
1037 | insn->op = FILTER_OP_CAST_DOUBLE_TO_S64; | |
1038 | break; | |
1039 | } | |
1040 | /* Pop 1, push 1 */ | |
1041 | vstack_ax(stack)->type = REG_S64; | |
1042 | next_pc += sizeof(struct cast_op); | |
1043 | break; | |
1044 | } | |
1045 | case FILTER_OP_CAST_DOUBLE_TO_S64: | |
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_NOP: | |
1053 | { | |
1054 | next_pc += sizeof(struct cast_op); | |
1055 | break; | |
1056 | } | |
1057 | ||
3834b99f MD |
1058 | /* |
1059 | * Instructions for recursive traversal through composed types. | |
1060 | */ | |
1061 | case FILTER_OP_GET_CONTEXT_ROOT: | |
1062 | { | |
1063 | if (vstack_push(stack)) { | |
1064 | ret = -EINVAL; | |
1065 | goto end; | |
1066 | } | |
1067 | vstack_ax(stack)->type = REG_PTR; | |
1068 | vstack_ax(stack)->load.type = LOAD_ROOT_CONTEXT; | |
1069 | next_pc += sizeof(struct load_op); | |
1070 | break; | |
1071 | } | |
1072 | case FILTER_OP_GET_APP_CONTEXT_ROOT: | |
1073 | { | |
1074 | if (vstack_push(stack)) { | |
1075 | ret = -EINVAL; | |
1076 | goto end; | |
1077 | } | |
1078 | vstack_ax(stack)->type = REG_PTR; | |
1079 | vstack_ax(stack)->load.type = LOAD_ROOT_APP_CONTEXT; | |
1080 | next_pc += sizeof(struct load_op); | |
1081 | break; | |
1082 | } | |
1083 | case FILTER_OP_GET_PAYLOAD_ROOT: | |
1084 | { | |
1085 | if (vstack_push(stack)) { | |
1086 | ret = -EINVAL; | |
1087 | goto end; | |
1088 | } | |
1089 | vstack_ax(stack)->type = REG_PTR; | |
1090 | vstack_ax(stack)->load.type = LOAD_ROOT_PAYLOAD; | |
1091 | next_pc += sizeof(struct load_op); | |
1092 | break; | |
1093 | } | |
1094 | ||
1095 | case FILTER_OP_LOAD_FIELD: | |
1096 | { | |
1097 | struct load_op *insn = (struct load_op *) pc; | |
1098 | ||
1099 | WARN_ON_ONCE(vstack_ax(stack)->type != REG_PTR); | |
1100 | /* Pop 1, push 1 */ | |
1101 | ret = specialize_load_field(vstack_ax(stack), insn); | |
1102 | if (ret) | |
1103 | goto end; | |
1104 | ||
1105 | next_pc += sizeof(struct load_op); | |
1106 | break; | |
1107 | } | |
1108 | ||
1109 | case FILTER_OP_LOAD_FIELD_S8: | |
1110 | case FILTER_OP_LOAD_FIELD_S16: | |
1111 | case FILTER_OP_LOAD_FIELD_S32: | |
1112 | case FILTER_OP_LOAD_FIELD_S64: | |
1113 | case FILTER_OP_LOAD_FIELD_U8: | |
1114 | case FILTER_OP_LOAD_FIELD_U16: | |
1115 | case FILTER_OP_LOAD_FIELD_U32: | |
1116 | case FILTER_OP_LOAD_FIELD_U64: | |
1117 | { | |
1118 | /* Pop 1, push 1 */ | |
1119 | vstack_ax(stack)->type = REG_S64; | |
1120 | next_pc += sizeof(struct load_op); | |
1121 | break; | |
1122 | } | |
1123 | ||
1124 | case FILTER_OP_LOAD_FIELD_STRING: | |
1125 | case FILTER_OP_LOAD_FIELD_SEQUENCE: | |
1126 | { | |
1127 | /* Pop 1, push 1 */ | |
1128 | vstack_ax(stack)->type = REG_STRING; | |
1129 | next_pc += sizeof(struct load_op); | |
1130 | break; | |
1131 | } | |
1132 | ||
1133 | case FILTER_OP_LOAD_FIELD_DOUBLE: | |
1134 | { | |
1135 | /* Pop 1, push 1 */ | |
1136 | vstack_ax(stack)->type = REG_DOUBLE; | |
1137 | next_pc += sizeof(struct load_op); | |
1138 | break; | |
1139 | } | |
1140 | ||
1141 | case FILTER_OP_GET_SYMBOL: | |
1142 | { | |
1143 | struct load_op *insn = (struct load_op *) pc; | |
1144 | ||
1145 | dbg_printk("op get symbol\n"); | |
1146 | switch (vstack_ax(stack)->load.type) { | |
1147 | case LOAD_OBJECT: | |
1148 | printk(KERN_WARNING "Nested fields not implemented yet.\n"); | |
1149 | ret = -EINVAL; | |
1150 | goto end; | |
1151 | case LOAD_ROOT_CONTEXT: | |
1152 | /* Lookup context field. */ | |
1153 | ret = specialize_context_lookup(bytecode, insn, | |
1154 | &vstack_ax(stack)->load); | |
1155 | if (ret) | |
1156 | goto end; | |
1157 | break; | |
1158 | case LOAD_ROOT_APP_CONTEXT: | |
1159 | ret = -EINVAL; | |
1160 | goto end; | |
1161 | case LOAD_ROOT_PAYLOAD: | |
1162 | /* Lookup event payload field. */ | |
1163 | ret = specialize_event_payload_lookup(event, | |
1164 | bytecode, insn, | |
1165 | &vstack_ax(stack)->load); | |
1166 | if (ret) | |
1167 | goto end; | |
1168 | break; | |
1169 | } | |
1170 | next_pc += sizeof(struct load_op) + sizeof(struct get_symbol); | |
1171 | break; | |
1172 | } | |
1173 | ||
1174 | case FILTER_OP_GET_SYMBOL_FIELD: | |
1175 | { | |
1176 | /* Always generated by specialize phase. */ | |
1177 | ret = -EINVAL; | |
1178 | goto end; | |
1179 | } | |
1180 | ||
1181 | case FILTER_OP_GET_INDEX_U16: | |
1182 | { | |
1183 | struct load_op *insn = (struct load_op *) pc; | |
1184 | struct get_index_u16 *index = (struct get_index_u16 *) insn->data; | |
1185 | ||
1186 | dbg_printk("op get index u16\n"); | |
1187 | /* Pop 1, push 1 */ | |
1188 | ret = specialize_get_index(bytecode, insn, index->index, | |
1189 | vstack_ax(stack), sizeof(*index)); | |
1190 | if (ret) | |
1191 | goto end; | |
1192 | next_pc += sizeof(struct load_op) + sizeof(struct get_index_u16); | |
1193 | break; | |
1194 | } | |
1195 | ||
1196 | case FILTER_OP_GET_INDEX_U64: | |
1197 | { | |
1198 | struct load_op *insn = (struct load_op *) pc; | |
1199 | struct get_index_u64 *index = (struct get_index_u64 *) insn->data; | |
1200 | ||
1201 | dbg_printk("op get index u64\n"); | |
1202 | /* Pop 1, push 1 */ | |
1203 | ret = specialize_get_index(bytecode, insn, index->index, | |
1204 | vstack_ax(stack), sizeof(*index)); | |
1205 | if (ret) | |
1206 | goto end; | |
1207 | next_pc += sizeof(struct load_op) + sizeof(struct get_index_u64); | |
1208 | break; | |
1209 | } | |
1210 | ||
07dfc1d0 MD |
1211 | } |
1212 | } | |
1213 | end: | |
1214 | return ret; | |
1215 | } |