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; | |
c89271d4 | 79 | if (!stack_top->load.user) |
3834b99f MD |
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; | |
c89271d4 | 85 | if (!stack_top->load.rev_bo && !stack_top->load.user) |
3834b99f MD |
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; | |
c89271d4 | 91 | if (!stack_top->load.rev_bo && !stack_top->load.user) |
3834b99f MD |
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; | |
c89271d4 | 97 | if (!stack_top->load.rev_bo && !stack_top->load.user) |
3834b99f MD |
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; | |
c89271d4 MD |
103 | if (!stack_top->load.user) |
104 | insn->op = FILTER_OP_LOAD_FIELD_U8; | |
3834b99f MD |
105 | break; |
106 | case OBJECT_TYPE_U16: | |
107 | dbg_printk("op load field u16\n"); | |
108 | stack_top->type = REG_S64; | |
c89271d4 | 109 | if (!stack_top->load.rev_bo && !stack_top->load.user) |
3834b99f MD |
110 | insn->op = FILTER_OP_LOAD_FIELD_U16; |
111 | break; | |
112 | case OBJECT_TYPE_U32: | |
113 | dbg_printk("op load field u32\n"); | |
114 | stack_top->type = REG_S64; | |
c89271d4 | 115 | if (!stack_top->load.rev_bo && !stack_top->load.user) |
3834b99f MD |
116 | insn->op = FILTER_OP_LOAD_FIELD_U32; |
117 | break; | |
118 | case OBJECT_TYPE_U64: | |
119 | dbg_printk("op load field u64\n"); | |
120 | stack_top->type = REG_S64; | |
c89271d4 | 121 | if (!stack_top->load.rev_bo && !stack_top->load.user) |
3834b99f MD |
122 | insn->op = FILTER_OP_LOAD_FIELD_U64; |
123 | break; | |
124 | case OBJECT_TYPE_DOUBLE: | |
125 | printk(KERN_WARNING "Double type unsupported\n\n"); | |
126 | ret = -EINVAL; | |
127 | goto end; | |
128 | case OBJECT_TYPE_STRING: | |
129 | dbg_printk("op load field string\n"); | |
130 | stack_top->type = REG_STRING; | |
c89271d4 MD |
131 | if (!stack_top->load.user) |
132 | insn->op = FILTER_OP_LOAD_FIELD_STRING; | |
3834b99f MD |
133 | break; |
134 | case OBJECT_TYPE_STRING_SEQUENCE: | |
135 | dbg_printk("op load field string sequence\n"); | |
136 | stack_top->type = REG_STRING; | |
c89271d4 MD |
137 | if (!stack_top->load.user) |
138 | insn->op = FILTER_OP_LOAD_FIELD_SEQUENCE; | |
3834b99f MD |
139 | break; |
140 | case OBJECT_TYPE_DYNAMIC: | |
141 | ret = -EINVAL; | |
142 | goto end; | |
143 | case OBJECT_TYPE_SEQUENCE: | |
144 | case OBJECT_TYPE_ARRAY: | |
145 | case OBJECT_TYPE_STRUCT: | |
146 | case OBJECT_TYPE_VARIANT: | |
147 | printk(KERN_WARNING "Sequences, arrays, struct and variant cannot be loaded (nested types).\n"); | |
148 | ret = -EINVAL; | |
149 | goto end; | |
150 | } | |
151 | return 0; | |
152 | ||
153 | end: | |
154 | return ret; | |
155 | } | |
156 | ||
157 | static int specialize_get_index_object_type(enum object_type *otype, | |
158 | int signedness, uint32_t elem_len) | |
159 | { | |
160 | switch (elem_len) { | |
161 | case 8: | |
162 | if (signedness) | |
163 | *otype = OBJECT_TYPE_S8; | |
164 | else | |
165 | *otype = OBJECT_TYPE_U8; | |
166 | break; | |
167 | case 16: | |
168 | if (signedness) | |
169 | *otype = OBJECT_TYPE_S16; | |
170 | else | |
171 | *otype = OBJECT_TYPE_U16; | |
172 | break; | |
173 | case 32: | |
174 | if (signedness) | |
175 | *otype = OBJECT_TYPE_S32; | |
176 | else | |
177 | *otype = OBJECT_TYPE_U32; | |
178 | break; | |
179 | case 64: | |
180 | if (signedness) | |
181 | *otype = OBJECT_TYPE_S64; | |
182 | else | |
183 | *otype = OBJECT_TYPE_U64; | |
184 | break; | |
185 | default: | |
186 | return -EINVAL; | |
187 | } | |
188 | return 0; | |
189 | } | |
190 | ||
191 | static int specialize_get_index(struct bytecode_runtime *runtime, | |
192 | struct load_op *insn, uint64_t index, | |
193 | struct vstack_entry *stack_top, | |
194 | int idx_len) | |
195 | { | |
196 | int ret; | |
197 | struct filter_get_index_data gid; | |
198 | ssize_t data_offset; | |
199 | ||
200 | memset(&gid, 0, sizeof(gid)); | |
201 | switch (stack_top->load.type) { | |
202 | case LOAD_OBJECT: | |
203 | switch (stack_top->load.object_type) { | |
204 | case OBJECT_TYPE_ARRAY: | |
205 | { | |
206 | const struct lttng_event_field *field; | |
207 | uint32_t elem_len, num_elems; | |
208 | int signedness; | |
209 | ||
210 | field = stack_top->load.field; | |
211 | elem_len = field->type.u.array.elem_type.u.basic.integer.size; | |
212 | signedness = field->type.u.array.elem_type.u.basic.integer.signedness; | |
213 | num_elems = field->type.u.array.length; | |
214 | if (index >= num_elems) { | |
215 | ret = -EINVAL; | |
216 | goto end; | |
217 | } | |
218 | ret = specialize_get_index_object_type(&stack_top->load.object_type, | |
219 | signedness, elem_len); | |
220 | if (ret) | |
221 | goto end; | |
222 | gid.offset = index * (elem_len / CHAR_BIT); | |
223 | gid.array_len = num_elems * (elem_len / CHAR_BIT); | |
224 | gid.elem.type = stack_top->load.object_type; | |
225 | gid.elem.len = elem_len; | |
c89271d4 MD |
226 | stack_top->load.rev_bo = gid.elem.rev_bo = field->type.u.array.elem_type.u.basic.integer.reverse_byte_order; |
227 | stack_top->load.user = gid.elem.user = field->type.u.array.elem_type.u.basic.integer.user; | |
3834b99f MD |
228 | break; |
229 | } | |
230 | case OBJECT_TYPE_SEQUENCE: | |
231 | { | |
232 | const struct lttng_event_field *field; | |
233 | uint32_t elem_len; | |
234 | int signedness; | |
235 | ||
236 | field = stack_top->load.field; | |
237 | elem_len = field->type.u.sequence.elem_type.u.basic.integer.size; | |
238 | signedness = field->type.u.sequence.elem_type.u.basic.integer.signedness; | |
239 | ret = specialize_get_index_object_type(&stack_top->load.object_type, | |
240 | signedness, elem_len); | |
241 | if (ret) | |
242 | goto end; | |
243 | gid.offset = index * (elem_len / CHAR_BIT); | |
244 | gid.elem.type = stack_top->load.object_type; | |
245 | gid.elem.len = elem_len; | |
c89271d4 MD |
246 | stack_top->load.rev_bo = gid.elem.rev_bo = field->type.u.sequence.elem_type.u.basic.integer.reverse_byte_order; |
247 | stack_top->load.user = gid.elem.user = field->type.u.sequence.elem_type.u.basic.integer.user; | |
3834b99f MD |
248 | break; |
249 | } | |
250 | case OBJECT_TYPE_STRUCT: | |
251 | /* Only generated by the specialize phase. */ | |
1d00109f MJ |
252 | case OBJECT_TYPE_VARIANT: |
253 | lttng_fallthrough; | |
3834b99f MD |
254 | default: |
255 | printk(KERN_WARNING "Unexpected get index type %d", | |
256 | (int) stack_top->load.object_type); | |
257 | ret = -EINVAL; | |
258 | goto end; | |
259 | } | |
260 | break; | |
261 | case LOAD_ROOT_CONTEXT: | |
262 | case LOAD_ROOT_APP_CONTEXT: | |
263 | case LOAD_ROOT_PAYLOAD: | |
264 | printk(KERN_WARNING "Index lookup for root field not implemented yet.\n"); | |
265 | ret = -EINVAL; | |
266 | goto end; | |
267 | } | |
268 | data_offset = bytecode_push_data(runtime, &gid, | |
269 | __alignof__(gid), sizeof(gid)); | |
270 | if (data_offset < 0) { | |
271 | ret = -EINVAL; | |
272 | goto end; | |
273 | } | |
274 | switch (idx_len) { | |
275 | case 2: | |
276 | ((struct get_index_u16 *) insn->data)->index = data_offset; | |
277 | break; | |
278 | case 8: | |
279 | ((struct get_index_u64 *) insn->data)->index = data_offset; | |
280 | break; | |
281 | default: | |
282 | ret = -EINVAL; | |
283 | goto end; | |
284 | } | |
285 | ||
286 | return 0; | |
287 | ||
288 | end: | |
289 | return ret; | |
290 | } | |
291 | ||
292 | static int specialize_context_lookup_name(struct bytecode_runtime *bytecode, | |
293 | struct load_op *insn) | |
294 | { | |
295 | uint16_t offset; | |
296 | const char *name; | |
297 | ||
298 | offset = ((struct get_symbol *) insn->data)->offset; | |
299 | name = bytecode->p.bc->bc.data + bytecode->p.bc->bc.reloc_offset + offset; | |
300 | return lttng_get_context_index(lttng_static_ctx, name); | |
301 | } | |
302 | ||
303 | static int specialize_load_object(const struct lttng_event_field *field, | |
304 | struct vstack_load *load, bool is_context) | |
305 | { | |
306 | load->type = LOAD_OBJECT; | |
307 | /* | |
308 | * LTTng-UST layout all integer fields as s64 on the stack for the filter. | |
309 | */ | |
310 | switch (field->type.atype) { | |
311 | case atype_integer: | |
312 | if (field->type.u.basic.integer.signedness) | |
313 | load->object_type = OBJECT_TYPE_S64; | |
314 | else | |
315 | load->object_type = OBJECT_TYPE_U64; | |
c89271d4 MD |
316 | load->rev_bo = field->type.u.basic.integer.reverse_byte_order; |
317 | load->user = field->type.u.basic.integer.user; | |
3834b99f MD |
318 | break; |
319 | case atype_enum: | |
320 | { | |
321 | const struct lttng_integer_type *itype = | |
322 | &field->type.u.basic.enumeration.container_type; | |
323 | ||
324 | if (itype->signedness) | |
325 | load->object_type = OBJECT_TYPE_S64; | |
326 | else | |
327 | load->object_type = OBJECT_TYPE_U64; | |
c89271d4 MD |
328 | load->rev_bo = itype->reverse_byte_order; |
329 | load->user = itype->user; | |
3834b99f MD |
330 | break; |
331 | } | |
332 | case atype_array: | |
333 | if (field->type.u.array.elem_type.atype != atype_integer) { | |
334 | printk(KERN_WARNING "Array nesting only supports integer types.\n"); | |
335 | return -EINVAL; | |
336 | } | |
337 | if (is_context) { | |
338 | load->object_type = OBJECT_TYPE_STRING; | |
c89271d4 | 339 | load->user = field->type.u.array.elem_type.u.basic.integer.user; |
3834b99f MD |
340 | } else { |
341 | if (field->type.u.array.elem_type.u.basic.integer.encoding == lttng_encode_none) { | |
342 | load->object_type = OBJECT_TYPE_ARRAY; | |
343 | load->field = field; | |
344 | } else { | |
345 | load->object_type = OBJECT_TYPE_STRING_SEQUENCE; | |
c89271d4 | 346 | load->user = field->type.u.array.elem_type.u.basic.integer.user; |
3834b99f MD |
347 | } |
348 | } | |
349 | break; | |
350 | case atype_sequence: | |
351 | if (field->type.u.sequence.elem_type.atype != atype_integer) { | |
352 | printk(KERN_WARNING "Sequence nesting only supports integer types.\n"); | |
353 | return -EINVAL; | |
354 | } | |
355 | if (is_context) { | |
356 | load->object_type = OBJECT_TYPE_STRING; | |
c89271d4 | 357 | load->user = field->type.u.sequence.elem_type.u.basic.integer.user; |
3834b99f MD |
358 | } else { |
359 | if (field->type.u.sequence.elem_type.u.basic.integer.encoding == lttng_encode_none) { | |
360 | load->object_type = OBJECT_TYPE_SEQUENCE; | |
361 | load->field = field; | |
362 | } else { | |
363 | load->object_type = OBJECT_TYPE_STRING_SEQUENCE; | |
c89271d4 | 364 | load->user = field->type.u.sequence.elem_type.u.basic.integer.user; |
3834b99f MD |
365 | } |
366 | } | |
367 | break; | |
368 | case atype_array_bitfield: | |
369 | printk(KERN_WARNING "Bitfield array type is not supported.\n"); | |
370 | return -EINVAL; | |
371 | case atype_sequence_bitfield: | |
372 | printk(KERN_WARNING "Bitfield sequence type is not supported.\n"); | |
373 | return -EINVAL; | |
374 | case atype_string: | |
375 | load->object_type = OBJECT_TYPE_STRING; | |
c89271d4 | 376 | load->user = field->type.u.basic.string.user; |
3834b99f MD |
377 | break; |
378 | case atype_struct: | |
379 | printk(KERN_WARNING "Structure type cannot be loaded.\n"); | |
380 | return -EINVAL; | |
381 | default: | |
382 | printk(KERN_WARNING "Unknown type: %d", (int) field->type.atype); | |
383 | return -EINVAL; | |
384 | } | |
385 | return 0; | |
386 | } | |
387 | ||
388 | static int specialize_context_lookup(struct bytecode_runtime *runtime, | |
389 | struct load_op *insn, | |
390 | struct vstack_load *load) | |
391 | { | |
392 | int idx, ret; | |
393 | struct lttng_ctx_field *ctx_field; | |
394 | struct lttng_event_field *field; | |
395 | struct filter_get_index_data gid; | |
396 | ssize_t data_offset; | |
397 | ||
398 | idx = specialize_context_lookup_name(runtime, insn); | |
399 | if (idx < 0) { | |
400 | return -ENOENT; | |
401 | } | |
402 | ctx_field = <tng_static_ctx->fields[idx]; | |
403 | field = &ctx_field->event_field; | |
404 | ret = specialize_load_object(field, load, true); | |
405 | if (ret) | |
406 | return ret; | |
407 | /* Specialize each get_symbol into a get_index. */ | |
408 | insn->op = FILTER_OP_GET_INDEX_U16; | |
409 | memset(&gid, 0, sizeof(gid)); | |
410 | gid.ctx_index = idx; | |
411 | gid.elem.type = load->object_type; | |
31afaf8b | 412 | gid.elem.rev_bo = load->rev_bo; |
c89271d4 | 413 | gid.elem.user = load->user; |
3834b99f MD |
414 | data_offset = bytecode_push_data(runtime, &gid, |
415 | __alignof__(gid), sizeof(gid)); | |
416 | if (data_offset < 0) { | |
417 | return -EINVAL; | |
418 | } | |
419 | ((struct get_index_u16 *) insn->data)->index = data_offset; | |
420 | return 0; | |
421 | } | |
422 | ||
423 | static int specialize_event_payload_lookup(struct lttng_event *event, | |
424 | struct bytecode_runtime *runtime, | |
425 | struct load_op *insn, | |
426 | struct vstack_load *load) | |
427 | { | |
428 | const char *name; | |
429 | uint16_t offset; | |
430 | const struct lttng_event_desc *desc = event->desc; | |
431 | unsigned int i, nr_fields; | |
432 | bool found = false; | |
433 | uint32_t field_offset = 0; | |
434 | const struct lttng_event_field *field; | |
435 | int ret; | |
436 | struct filter_get_index_data gid; | |
437 | ssize_t data_offset; | |
438 | ||
439 | nr_fields = desc->nr_fields; | |
440 | offset = ((struct get_symbol *) insn->data)->offset; | |
441 | name = runtime->p.bc->bc.data + runtime->p.bc->bc.reloc_offset + offset; | |
442 | for (i = 0; i < nr_fields; i++) { | |
443 | field = &desc->fields[i]; | |
444 | if (!strcmp(field->name, name)) { | |
445 | found = true; | |
446 | break; | |
447 | } | |
448 | /* compute field offset on stack */ | |
449 | switch (field->type.atype) { | |
450 | case atype_integer: | |
451 | case atype_enum: | |
452 | field_offset += sizeof(int64_t); | |
453 | break; | |
454 | case atype_array: | |
455 | case atype_sequence: | |
456 | case atype_array_bitfield: | |
457 | case atype_sequence_bitfield: | |
458 | field_offset += sizeof(unsigned long); | |
459 | field_offset += sizeof(void *); | |
460 | break; | |
461 | case atype_string: | |
462 | field_offset += sizeof(void *); | |
463 | break; | |
464 | default: | |
465 | ret = -EINVAL; | |
466 | goto end; | |
467 | } | |
468 | } | |
469 | if (!found) { | |
470 | ret = -EINVAL; | |
471 | goto end; | |
472 | } | |
473 | ||
474 | ret = specialize_load_object(field, load, false); | |
475 | if (ret) | |
476 | goto end; | |
477 | ||
478 | /* Specialize each get_symbol into a get_index. */ | |
479 | insn->op = FILTER_OP_GET_INDEX_U16; | |
480 | memset(&gid, 0, sizeof(gid)); | |
481 | gid.offset = field_offset; | |
482 | gid.elem.type = load->object_type; | |
31afaf8b | 483 | gid.elem.rev_bo = load->rev_bo; |
c89271d4 | 484 | gid.elem.user = load->user; |
3834b99f MD |
485 | data_offset = bytecode_push_data(runtime, &gid, |
486 | __alignof__(gid), sizeof(gid)); | |
487 | if (data_offset < 0) { | |
488 | ret = -EINVAL; | |
489 | goto end; | |
490 | } | |
491 | ((struct get_index_u16 *) insn->data)->index = data_offset; | |
492 | ret = 0; | |
493 | end: | |
494 | return ret; | |
495 | } | |
496 | ||
497 | int lttng_filter_specialize_bytecode(struct lttng_event *event, | |
498 | struct bytecode_runtime *bytecode) | |
07dfc1d0 MD |
499 | { |
500 | void *pc, *next_pc, *start_pc; | |
501 | int ret = -EINVAL; | |
502 | struct vstack _stack; | |
503 | struct vstack *stack = &_stack; | |
504 | ||
505 | vstack_init(stack); | |
506 | ||
3834b99f | 507 | start_pc = &bytecode->code[0]; |
07dfc1d0 MD |
508 | for (pc = next_pc = start_pc; pc - start_pc < bytecode->len; |
509 | pc = next_pc) { | |
510 | switch (*(filter_opcode_t *) pc) { | |
511 | case FILTER_OP_UNKNOWN: | |
512 | default: | |
513 | printk(KERN_WARNING "unknown bytecode op %u\n", | |
514 | (unsigned int) *(filter_opcode_t *) pc); | |
515 | ret = -EINVAL; | |
516 | goto end; | |
517 | ||
518 | case FILTER_OP_RETURN: | |
57ba4b41 | 519 | case FILTER_OP_RETURN_S64: |
07dfc1d0 MD |
520 | ret = 0; |
521 | goto end; | |
522 | ||
523 | /* binary */ | |
524 | case FILTER_OP_MUL: | |
525 | case FILTER_OP_DIV: | |
526 | case FILTER_OP_MOD: | |
527 | case FILTER_OP_PLUS: | |
528 | case FILTER_OP_MINUS: | |
07dfc1d0 MD |
529 | printk(KERN_WARNING "unsupported bytecode op %u\n", |
530 | (unsigned int) *(filter_opcode_t *) pc); | |
531 | ret = -EINVAL; | |
532 | goto end; | |
533 | ||
534 | case FILTER_OP_EQ: | |
535 | { | |
536 | struct binary_op *insn = (struct binary_op *) pc; | |
537 | ||
538 | switch(vstack_ax(stack)->type) { | |
539 | default: | |
540 | printk(KERN_WARNING "unknown register type\n"); | |
541 | ret = -EINVAL; | |
542 | goto end; | |
543 | ||
544 | case REG_STRING: | |
02aca193 PP |
545 | if (vstack_bx(stack)->type == REG_STAR_GLOB_STRING) |
546 | insn->op = FILTER_OP_EQ_STAR_GLOB_STRING; | |
547 | else | |
548 | insn->op = FILTER_OP_EQ_STRING; | |
549 | break; | |
550 | case REG_STAR_GLOB_STRING: | |
551 | insn->op = FILTER_OP_EQ_STAR_GLOB_STRING; | |
07dfc1d0 MD |
552 | break; |
553 | case REG_S64: | |
554 | if (vstack_bx(stack)->type == REG_S64) | |
555 | insn->op = FILTER_OP_EQ_S64; | |
556 | else | |
557 | insn->op = FILTER_OP_EQ_DOUBLE_S64; | |
558 | break; | |
559 | case REG_DOUBLE: | |
560 | if (vstack_bx(stack)->type == REG_S64) | |
561 | insn->op = FILTER_OP_EQ_S64_DOUBLE; | |
562 | else | |
563 | insn->op = FILTER_OP_EQ_DOUBLE; | |
564 | break; | |
565 | } | |
566 | /* Pop 2, push 1 */ | |
567 | if (vstack_pop(stack)) { | |
568 | ret = -EINVAL; | |
569 | goto end; | |
570 | } | |
571 | vstack_ax(stack)->type = REG_S64; | |
572 | next_pc += sizeof(struct binary_op); | |
573 | break; | |
574 | } | |
575 | ||
576 | case FILTER_OP_NE: | |
577 | { | |
578 | struct binary_op *insn = (struct binary_op *) pc; | |
579 | ||
580 | switch(vstack_ax(stack)->type) { | |
581 | default: | |
582 | printk(KERN_WARNING "unknown register type\n"); | |
583 | ret = -EINVAL; | |
584 | goto end; | |
585 | ||
586 | case REG_STRING: | |
02aca193 PP |
587 | if (vstack_bx(stack)->type == REG_STAR_GLOB_STRING) |
588 | insn->op = FILTER_OP_NE_STAR_GLOB_STRING; | |
589 | else | |
590 | insn->op = FILTER_OP_NE_STRING; | |
591 | break; | |
592 | case REG_STAR_GLOB_STRING: | |
593 | insn->op = FILTER_OP_NE_STAR_GLOB_STRING; | |
07dfc1d0 MD |
594 | break; |
595 | case REG_S64: | |
596 | if (vstack_bx(stack)->type == REG_S64) | |
597 | insn->op = FILTER_OP_NE_S64; | |
598 | else | |
599 | insn->op = FILTER_OP_NE_DOUBLE_S64; | |
600 | break; | |
601 | case REG_DOUBLE: | |
602 | if (vstack_bx(stack)->type == REG_S64) | |
603 | insn->op = FILTER_OP_NE_S64_DOUBLE; | |
604 | else | |
605 | insn->op = FILTER_OP_NE_DOUBLE; | |
606 | break; | |
607 | } | |
608 | /* Pop 2, push 1 */ | |
609 | if (vstack_pop(stack)) { | |
610 | ret = -EINVAL; | |
611 | goto end; | |
612 | } | |
613 | vstack_ax(stack)->type = REG_S64; | |
614 | next_pc += sizeof(struct binary_op); | |
615 | break; | |
616 | } | |
617 | ||
618 | case FILTER_OP_GT: | |
619 | { | |
620 | struct binary_op *insn = (struct binary_op *) pc; | |
621 | ||
622 | switch(vstack_ax(stack)->type) { | |
623 | default: | |
624 | printk(KERN_WARNING "unknown register type\n"); | |
625 | ret = -EINVAL; | |
626 | goto end; | |
627 | ||
02aca193 PP |
628 | case REG_STAR_GLOB_STRING: |
629 | printk(KERN_WARNING "invalid register type for > binary operator\n"); | |
630 | ret = -EINVAL; | |
631 | goto end; | |
07dfc1d0 MD |
632 | case REG_STRING: |
633 | insn->op = FILTER_OP_GT_STRING; | |
634 | break; | |
635 | case REG_S64: | |
636 | if (vstack_bx(stack)->type == REG_S64) | |
637 | insn->op = FILTER_OP_GT_S64; | |
638 | else | |
639 | insn->op = FILTER_OP_GT_DOUBLE_S64; | |
640 | break; | |
641 | case REG_DOUBLE: | |
642 | if (vstack_bx(stack)->type == REG_S64) | |
643 | insn->op = FILTER_OP_GT_S64_DOUBLE; | |
644 | else | |
645 | insn->op = FILTER_OP_GT_DOUBLE; | |
646 | break; | |
647 | } | |
648 | /* Pop 2, push 1 */ | |
649 | if (vstack_pop(stack)) { | |
650 | ret = -EINVAL; | |
651 | goto end; | |
652 | } | |
653 | vstack_ax(stack)->type = REG_S64; | |
654 | next_pc += sizeof(struct binary_op); | |
655 | break; | |
656 | } | |
657 | ||
658 | case FILTER_OP_LT: | |
659 | { | |
660 | struct binary_op *insn = (struct binary_op *) pc; | |
661 | ||
662 | switch(vstack_ax(stack)->type) { | |
663 | default: | |
664 | printk(KERN_WARNING "unknown register type\n"); | |
665 | ret = -EINVAL; | |
666 | goto end; | |
667 | ||
02aca193 PP |
668 | case REG_STAR_GLOB_STRING: |
669 | printk(KERN_WARNING "invalid register type for < binary operator\n"); | |
670 | ret = -EINVAL; | |
671 | goto end; | |
07dfc1d0 MD |
672 | case REG_STRING: |
673 | insn->op = FILTER_OP_LT_STRING; | |
674 | break; | |
675 | case REG_S64: | |
676 | if (vstack_bx(stack)->type == REG_S64) | |
677 | insn->op = FILTER_OP_LT_S64; | |
678 | else | |
679 | insn->op = FILTER_OP_LT_DOUBLE_S64; | |
680 | break; | |
681 | case REG_DOUBLE: | |
682 | if (vstack_bx(stack)->type == REG_S64) | |
683 | insn->op = FILTER_OP_LT_S64_DOUBLE; | |
684 | else | |
685 | insn->op = FILTER_OP_LT_DOUBLE; | |
686 | break; | |
687 | } | |
688 | /* Pop 2, push 1 */ | |
689 | if (vstack_pop(stack)) { | |
690 | ret = -EINVAL; | |
691 | goto end; | |
692 | } | |
693 | vstack_ax(stack)->type = REG_S64; | |
694 | next_pc += sizeof(struct binary_op); | |
695 | break; | |
696 | } | |
697 | ||
698 | case FILTER_OP_GE: | |
699 | { | |
700 | struct binary_op *insn = (struct binary_op *) pc; | |
701 | ||
702 | switch(vstack_ax(stack)->type) { | |
703 | default: | |
704 | printk(KERN_WARNING "unknown register type\n"); | |
705 | ret = -EINVAL; | |
706 | goto end; | |
707 | ||
02aca193 PP |
708 | case REG_STAR_GLOB_STRING: |
709 | printk(KERN_WARNING "invalid register type for >= binary operator\n"); | |
710 | ret = -EINVAL; | |
711 | goto end; | |
07dfc1d0 MD |
712 | case REG_STRING: |
713 | insn->op = FILTER_OP_GE_STRING; | |
714 | break; | |
715 | case REG_S64: | |
716 | if (vstack_bx(stack)->type == REG_S64) | |
717 | insn->op = FILTER_OP_GE_S64; | |
718 | else | |
719 | insn->op = FILTER_OP_GE_DOUBLE_S64; | |
720 | break; | |
721 | case REG_DOUBLE: | |
722 | if (vstack_bx(stack)->type == REG_S64) | |
723 | insn->op = FILTER_OP_GE_S64_DOUBLE; | |
724 | else | |
725 | insn->op = FILTER_OP_GE_DOUBLE; | |
726 | break; | |
727 | } | |
728 | /* Pop 2, push 1 */ | |
729 | if (vstack_pop(stack)) { | |
730 | ret = -EINVAL; | |
731 | goto end; | |
732 | } | |
733 | vstack_ax(stack)->type = REG_S64; | |
734 | next_pc += sizeof(struct binary_op); | |
735 | break; | |
736 | } | |
737 | case FILTER_OP_LE: | |
738 | { | |
739 | struct binary_op *insn = (struct binary_op *) pc; | |
740 | ||
741 | switch(vstack_ax(stack)->type) { | |
742 | default: | |
743 | printk(KERN_WARNING "unknown register type\n"); | |
744 | ret = -EINVAL; | |
745 | goto end; | |
746 | ||
02aca193 PP |
747 | case REG_STAR_GLOB_STRING: |
748 | printk(KERN_WARNING "invalid register type for <= binary operator\n"); | |
749 | ret = -EINVAL; | |
750 | goto end; | |
07dfc1d0 MD |
751 | case REG_STRING: |
752 | insn->op = FILTER_OP_LE_STRING; | |
753 | break; | |
754 | case REG_S64: | |
755 | if (vstack_bx(stack)->type == REG_S64) | |
756 | insn->op = FILTER_OP_LE_S64; | |
757 | else | |
758 | insn->op = FILTER_OP_LE_DOUBLE_S64; | |
759 | break; | |
760 | case REG_DOUBLE: | |
761 | if (vstack_bx(stack)->type == REG_S64) | |
762 | insn->op = FILTER_OP_LE_S64_DOUBLE; | |
763 | else | |
764 | insn->op = FILTER_OP_LE_DOUBLE; | |
765 | break; | |
766 | } | |
767 | vstack_ax(stack)->type = REG_S64; | |
768 | next_pc += sizeof(struct binary_op); | |
769 | break; | |
770 | } | |
771 | ||
772 | case FILTER_OP_EQ_STRING: | |
773 | case FILTER_OP_NE_STRING: | |
774 | case FILTER_OP_GT_STRING: | |
775 | case FILTER_OP_LT_STRING: | |
776 | case FILTER_OP_GE_STRING: | |
777 | case FILTER_OP_LE_STRING: | |
02aca193 PP |
778 | case FILTER_OP_EQ_STAR_GLOB_STRING: |
779 | case FILTER_OP_NE_STAR_GLOB_STRING: | |
07dfc1d0 MD |
780 | case FILTER_OP_EQ_S64: |
781 | case FILTER_OP_NE_S64: | |
782 | case FILTER_OP_GT_S64: | |
783 | case FILTER_OP_LT_S64: | |
784 | case FILTER_OP_GE_S64: | |
785 | case FILTER_OP_LE_S64: | |
786 | case FILTER_OP_EQ_DOUBLE: | |
787 | case FILTER_OP_NE_DOUBLE: | |
788 | case FILTER_OP_GT_DOUBLE: | |
789 | case FILTER_OP_LT_DOUBLE: | |
790 | case FILTER_OP_GE_DOUBLE: | |
791 | case FILTER_OP_LE_DOUBLE: | |
792 | case FILTER_OP_EQ_DOUBLE_S64: | |
793 | case FILTER_OP_NE_DOUBLE_S64: | |
794 | case FILTER_OP_GT_DOUBLE_S64: | |
795 | case FILTER_OP_LT_DOUBLE_S64: | |
796 | case FILTER_OP_GE_DOUBLE_S64: | |
797 | case FILTER_OP_LE_DOUBLE_S64: | |
798 | case FILTER_OP_EQ_S64_DOUBLE: | |
799 | case FILTER_OP_NE_S64_DOUBLE: | |
800 | case FILTER_OP_GT_S64_DOUBLE: | |
801 | case FILTER_OP_LT_S64_DOUBLE: | |
802 | case FILTER_OP_GE_S64_DOUBLE: | |
803 | case FILTER_OP_LE_S64_DOUBLE: | |
e16c054b MD |
804 | case FILTER_OP_BIT_RSHIFT: |
805 | case FILTER_OP_BIT_LSHIFT: | |
3834b99f MD |
806 | case FILTER_OP_BIT_AND: |
807 | case FILTER_OP_BIT_OR: | |
808 | case FILTER_OP_BIT_XOR: | |
07dfc1d0 MD |
809 | { |
810 | /* Pop 2, push 1 */ | |
811 | if (vstack_pop(stack)) { | |
812 | ret = -EINVAL; | |
813 | goto end; | |
814 | } | |
815 | vstack_ax(stack)->type = REG_S64; | |
816 | next_pc += sizeof(struct binary_op); | |
817 | break; | |
818 | } | |
819 | ||
820 | /* unary */ | |
821 | case FILTER_OP_UNARY_PLUS: | |
822 | { | |
823 | struct unary_op *insn = (struct unary_op *) pc; | |
824 | ||
825 | switch(vstack_ax(stack)->type) { | |
826 | default: | |
827 | printk(KERN_WARNING "unknown register type\n"); | |
828 | ret = -EINVAL; | |
829 | goto end; | |
830 | ||
831 | case REG_S64: | |
832 | insn->op = FILTER_OP_UNARY_PLUS_S64; | |
833 | break; | |
834 | case REG_DOUBLE: | |
835 | insn->op = FILTER_OP_UNARY_PLUS_DOUBLE; | |
836 | break; | |
837 | } | |
838 | /* Pop 1, push 1 */ | |
839 | next_pc += sizeof(struct unary_op); | |
840 | break; | |
841 | } | |
842 | ||
843 | case FILTER_OP_UNARY_MINUS: | |
844 | { | |
845 | struct unary_op *insn = (struct unary_op *) pc; | |
846 | ||
847 | switch(vstack_ax(stack)->type) { | |
848 | default: | |
849 | printk(KERN_WARNING "unknown register type\n"); | |
850 | ret = -EINVAL; | |
851 | goto end; | |
852 | ||
853 | case REG_S64: | |
854 | insn->op = FILTER_OP_UNARY_MINUS_S64; | |
855 | break; | |
856 | case REG_DOUBLE: | |
857 | insn->op = FILTER_OP_UNARY_MINUS_DOUBLE; | |
858 | break; | |
859 | } | |
860 | /* Pop 1, push 1 */ | |
861 | next_pc += sizeof(struct unary_op); | |
862 | break; | |
863 | } | |
864 | ||
865 | case FILTER_OP_UNARY_NOT: | |
866 | { | |
867 | struct unary_op *insn = (struct unary_op *) pc; | |
868 | ||
869 | switch(vstack_ax(stack)->type) { | |
870 | default: | |
871 | printk(KERN_WARNING "unknown register type\n"); | |
872 | ret = -EINVAL; | |
873 | goto end; | |
874 | ||
875 | case REG_S64: | |
876 | insn->op = FILTER_OP_UNARY_NOT_S64; | |
877 | break; | |
878 | case REG_DOUBLE: | |
879 | insn->op = FILTER_OP_UNARY_NOT_DOUBLE; | |
880 | break; | |
881 | } | |
882 | /* Pop 1, push 1 */ | |
883 | next_pc += sizeof(struct unary_op); | |
884 | break; | |
885 | } | |
886 | ||
e16c054b MD |
887 | case FILTER_OP_UNARY_BIT_NOT: |
888 | { | |
889 | /* Pop 1, push 1 */ | |
890 | next_pc += sizeof(struct unary_op); | |
891 | break; | |
892 | } | |
893 | ||
07dfc1d0 MD |
894 | case FILTER_OP_UNARY_PLUS_S64: |
895 | case FILTER_OP_UNARY_MINUS_S64: | |
896 | case FILTER_OP_UNARY_NOT_S64: | |
897 | case FILTER_OP_UNARY_PLUS_DOUBLE: | |
898 | case FILTER_OP_UNARY_MINUS_DOUBLE: | |
899 | case FILTER_OP_UNARY_NOT_DOUBLE: | |
900 | { | |
901 | /* Pop 1, push 1 */ | |
902 | next_pc += sizeof(struct unary_op); | |
903 | break; | |
904 | } | |
905 | ||
906 | /* logical */ | |
907 | case FILTER_OP_AND: | |
908 | case FILTER_OP_OR: | |
909 | { | |
910 | /* Continue to next instruction */ | |
911 | /* Pop 1 when jump not taken */ | |
912 | if (vstack_pop(stack)) { | |
913 | ret = -EINVAL; | |
914 | goto end; | |
915 | } | |
916 | next_pc += sizeof(struct logical_op); | |
917 | break; | |
918 | } | |
919 | ||
920 | /* load field ref */ | |
921 | case FILTER_OP_LOAD_FIELD_REF: | |
922 | { | |
923 | printk(KERN_WARNING "Unknown field ref type\n"); | |
924 | ret = -EINVAL; | |
925 | goto end; | |
926 | } | |
927 | /* get context ref */ | |
928 | case FILTER_OP_GET_CONTEXT_REF: | |
929 | { | |
930 | printk(KERN_WARNING "Unknown get context ref type\n"); | |
931 | ret = -EINVAL; | |
932 | goto end; | |
933 | } | |
934 | case FILTER_OP_LOAD_FIELD_REF_STRING: | |
935 | case FILTER_OP_LOAD_FIELD_REF_SEQUENCE: | |
936 | case FILTER_OP_GET_CONTEXT_REF_STRING: | |
f127e61e MD |
937 | case FILTER_OP_LOAD_FIELD_REF_USER_STRING: |
938 | case FILTER_OP_LOAD_FIELD_REF_USER_SEQUENCE: | |
07dfc1d0 MD |
939 | { |
940 | if (vstack_push(stack)) { | |
941 | ret = -EINVAL; | |
942 | goto end; | |
943 | } | |
944 | vstack_ax(stack)->type = REG_STRING; | |
945 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
946 | break; | |
947 | } | |
948 | case FILTER_OP_LOAD_FIELD_REF_S64: | |
949 | case FILTER_OP_GET_CONTEXT_REF_S64: | |
950 | { | |
951 | if (vstack_push(stack)) { | |
952 | ret = -EINVAL; | |
953 | goto end; | |
954 | } | |
955 | vstack_ax(stack)->type = REG_S64; | |
956 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
957 | break; | |
958 | } | |
959 | case FILTER_OP_LOAD_FIELD_REF_DOUBLE: | |
960 | case FILTER_OP_GET_CONTEXT_REF_DOUBLE: | |
961 | { | |
962 | if (vstack_push(stack)) { | |
963 | ret = -EINVAL; | |
964 | goto end; | |
965 | } | |
966 | vstack_ax(stack)->type = REG_DOUBLE; | |
967 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
968 | break; | |
969 | } | |
970 | ||
971 | /* load from immediate operand */ | |
972 | case FILTER_OP_LOAD_STRING: | |
973 | { | |
974 | struct load_op *insn = (struct load_op *) pc; | |
975 | ||
976 | if (vstack_push(stack)) { | |
977 | ret = -EINVAL; | |
978 | goto end; | |
979 | } | |
980 | vstack_ax(stack)->type = REG_STRING; | |
981 | next_pc += sizeof(struct load_op) + strlen(insn->data) + 1; | |
982 | break; | |
983 | } | |
984 | ||
02aca193 PP |
985 | case FILTER_OP_LOAD_STAR_GLOB_STRING: |
986 | { | |
987 | struct load_op *insn = (struct load_op *) pc; | |
988 | ||
989 | if (vstack_push(stack)) { | |
990 | ret = -EINVAL; | |
991 | goto end; | |
992 | } | |
993 | vstack_ax(stack)->type = REG_STAR_GLOB_STRING; | |
994 | next_pc += sizeof(struct load_op) + strlen(insn->data) + 1; | |
995 | break; | |
996 | } | |
997 | ||
07dfc1d0 MD |
998 | case FILTER_OP_LOAD_S64: |
999 | { | |
1000 | if (vstack_push(stack)) { | |
1001 | ret = -EINVAL; | |
1002 | goto end; | |
1003 | } | |
1004 | vstack_ax(stack)->type = REG_S64; | |
1005 | next_pc += sizeof(struct load_op) | |
1006 | + sizeof(struct literal_numeric); | |
1007 | break; | |
1008 | } | |
1009 | ||
1010 | case FILTER_OP_LOAD_DOUBLE: | |
1011 | { | |
1012 | if (vstack_push(stack)) { | |
1013 | ret = -EINVAL; | |
1014 | goto end; | |
1015 | } | |
1016 | vstack_ax(stack)->type = REG_DOUBLE; | |
1017 | next_pc += sizeof(struct load_op) | |
1018 | + sizeof(struct literal_double); | |
1019 | break; | |
1020 | } | |
1021 | ||
1022 | /* cast */ | |
1023 | case FILTER_OP_CAST_TO_S64: | |
1024 | { | |
1025 | struct cast_op *insn = (struct cast_op *) pc; | |
1026 | ||
1027 | switch (vstack_ax(stack)->type) { | |
1028 | default: | |
1029 | printk(KERN_WARNING "unknown register type\n"); | |
1030 | ret = -EINVAL; | |
1031 | goto end; | |
1032 | ||
1033 | case REG_STRING: | |
02aca193 | 1034 | case REG_STAR_GLOB_STRING: |
07dfc1d0 MD |
1035 | printk(KERN_WARNING "Cast op can only be applied to numeric or floating point registers\n"); |
1036 | ret = -EINVAL; | |
1037 | goto end; | |
1038 | case REG_S64: | |
1039 | insn->op = FILTER_OP_CAST_NOP; | |
1040 | break; | |
1041 | case REG_DOUBLE: | |
1042 | insn->op = FILTER_OP_CAST_DOUBLE_TO_S64; | |
1043 | break; | |
1044 | } | |
1045 | /* Pop 1, push 1 */ | |
1046 | vstack_ax(stack)->type = REG_S64; | |
1047 | next_pc += sizeof(struct cast_op); | |
1048 | break; | |
1049 | } | |
1050 | case FILTER_OP_CAST_DOUBLE_TO_S64: | |
1051 | { | |
1052 | /* Pop 1, push 1 */ | |
1053 | vstack_ax(stack)->type = REG_S64; | |
1054 | next_pc += sizeof(struct cast_op); | |
1055 | break; | |
1056 | } | |
1057 | case FILTER_OP_CAST_NOP: | |
1058 | { | |
1059 | next_pc += sizeof(struct cast_op); | |
1060 | break; | |
1061 | } | |
1062 | ||
3834b99f MD |
1063 | /* |
1064 | * Instructions for recursive traversal through composed types. | |
1065 | */ | |
1066 | case FILTER_OP_GET_CONTEXT_ROOT: | |
1067 | { | |
1068 | if (vstack_push(stack)) { | |
1069 | ret = -EINVAL; | |
1070 | goto end; | |
1071 | } | |
1072 | vstack_ax(stack)->type = REG_PTR; | |
1073 | vstack_ax(stack)->load.type = LOAD_ROOT_CONTEXT; | |
1074 | next_pc += sizeof(struct load_op); | |
1075 | break; | |
1076 | } | |
1077 | case FILTER_OP_GET_APP_CONTEXT_ROOT: | |
1078 | { | |
1079 | if (vstack_push(stack)) { | |
1080 | ret = -EINVAL; | |
1081 | goto end; | |
1082 | } | |
1083 | vstack_ax(stack)->type = REG_PTR; | |
1084 | vstack_ax(stack)->load.type = LOAD_ROOT_APP_CONTEXT; | |
1085 | next_pc += sizeof(struct load_op); | |
1086 | break; | |
1087 | } | |
1088 | case FILTER_OP_GET_PAYLOAD_ROOT: | |
1089 | { | |
1090 | if (vstack_push(stack)) { | |
1091 | ret = -EINVAL; | |
1092 | goto end; | |
1093 | } | |
1094 | vstack_ax(stack)->type = REG_PTR; | |
1095 | vstack_ax(stack)->load.type = LOAD_ROOT_PAYLOAD; | |
1096 | next_pc += sizeof(struct load_op); | |
1097 | break; | |
1098 | } | |
1099 | ||
1100 | case FILTER_OP_LOAD_FIELD: | |
1101 | { | |
1102 | struct load_op *insn = (struct load_op *) pc; | |
1103 | ||
1104 | WARN_ON_ONCE(vstack_ax(stack)->type != REG_PTR); | |
1105 | /* Pop 1, push 1 */ | |
1106 | ret = specialize_load_field(vstack_ax(stack), insn); | |
1107 | if (ret) | |
1108 | goto end; | |
1109 | ||
1110 | next_pc += sizeof(struct load_op); | |
1111 | break; | |
1112 | } | |
1113 | ||
1114 | case FILTER_OP_LOAD_FIELD_S8: | |
1115 | case FILTER_OP_LOAD_FIELD_S16: | |
1116 | case FILTER_OP_LOAD_FIELD_S32: | |
1117 | case FILTER_OP_LOAD_FIELD_S64: | |
1118 | case FILTER_OP_LOAD_FIELD_U8: | |
1119 | case FILTER_OP_LOAD_FIELD_U16: | |
1120 | case FILTER_OP_LOAD_FIELD_U32: | |
1121 | case FILTER_OP_LOAD_FIELD_U64: | |
1122 | { | |
1123 | /* Pop 1, push 1 */ | |
1124 | vstack_ax(stack)->type = REG_S64; | |
1125 | next_pc += sizeof(struct load_op); | |
1126 | break; | |
1127 | } | |
1128 | ||
1129 | case FILTER_OP_LOAD_FIELD_STRING: | |
1130 | case FILTER_OP_LOAD_FIELD_SEQUENCE: | |
1131 | { | |
1132 | /* Pop 1, push 1 */ | |
1133 | vstack_ax(stack)->type = REG_STRING; | |
1134 | next_pc += sizeof(struct load_op); | |
1135 | break; | |
1136 | } | |
1137 | ||
1138 | case FILTER_OP_LOAD_FIELD_DOUBLE: | |
1139 | { | |
1140 | /* Pop 1, push 1 */ | |
1141 | vstack_ax(stack)->type = REG_DOUBLE; | |
1142 | next_pc += sizeof(struct load_op); | |
1143 | break; | |
1144 | } | |
1145 | ||
1146 | case FILTER_OP_GET_SYMBOL: | |
1147 | { | |
1148 | struct load_op *insn = (struct load_op *) pc; | |
1149 | ||
1150 | dbg_printk("op get symbol\n"); | |
1151 | switch (vstack_ax(stack)->load.type) { | |
1152 | case LOAD_OBJECT: | |
1153 | printk(KERN_WARNING "Nested fields not implemented yet.\n"); | |
1154 | ret = -EINVAL; | |
1155 | goto end; | |
1156 | case LOAD_ROOT_CONTEXT: | |
1157 | /* Lookup context field. */ | |
1158 | ret = specialize_context_lookup(bytecode, insn, | |
1159 | &vstack_ax(stack)->load); | |
1160 | if (ret) | |
1161 | goto end; | |
1162 | break; | |
1163 | case LOAD_ROOT_APP_CONTEXT: | |
1164 | ret = -EINVAL; | |
1165 | goto end; | |
1166 | case LOAD_ROOT_PAYLOAD: | |
1167 | /* Lookup event payload field. */ | |
1168 | ret = specialize_event_payload_lookup(event, | |
1169 | bytecode, insn, | |
1170 | &vstack_ax(stack)->load); | |
1171 | if (ret) | |
1172 | goto end; | |
1173 | break; | |
1174 | } | |
1175 | next_pc += sizeof(struct load_op) + sizeof(struct get_symbol); | |
1176 | break; | |
1177 | } | |
1178 | ||
1179 | case FILTER_OP_GET_SYMBOL_FIELD: | |
1180 | { | |
1181 | /* Always generated by specialize phase. */ | |
1182 | ret = -EINVAL; | |
1183 | goto end; | |
1184 | } | |
1185 | ||
1186 | case FILTER_OP_GET_INDEX_U16: | |
1187 | { | |
1188 | struct load_op *insn = (struct load_op *) pc; | |
1189 | struct get_index_u16 *index = (struct get_index_u16 *) insn->data; | |
1190 | ||
1191 | dbg_printk("op get index u16\n"); | |
1192 | /* Pop 1, push 1 */ | |
1193 | ret = specialize_get_index(bytecode, insn, index->index, | |
1194 | vstack_ax(stack), sizeof(*index)); | |
1195 | if (ret) | |
1196 | goto end; | |
1197 | next_pc += sizeof(struct load_op) + sizeof(struct get_index_u16); | |
1198 | break; | |
1199 | } | |
1200 | ||
1201 | case FILTER_OP_GET_INDEX_U64: | |
1202 | { | |
1203 | struct load_op *insn = (struct load_op *) pc; | |
1204 | struct get_index_u64 *index = (struct get_index_u64 *) insn->data; | |
1205 | ||
1206 | dbg_printk("op get index u64\n"); | |
1207 | /* Pop 1, push 1 */ | |
1208 | ret = specialize_get_index(bytecode, insn, index->index, | |
1209 | vstack_ax(stack), sizeof(*index)); | |
1210 | if (ret) | |
1211 | goto end; | |
1212 | next_pc += sizeof(struct load_op) + sizeof(struct get_index_u64); | |
1213 | break; | |
1214 | } | |
1215 | ||
07dfc1d0 MD |
1216 | } |
1217 | } | |
1218 | end: | |
1219 | return ret; | |
1220 | } |