2 * lttng-filter-specialize.c
4 * LTTng modules filter code specializer.
6 * Copyright (C) 2010-2016 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
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:
15 * The above copyright notice and this permission notice shall be included in
16 * all copies or substantial portions of the Software.
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
27 #include <linux/slab.h>
28 #include <lttng-filter.h>
29 #include "lib/align.h"
31 static ssize_t
bytecode_reserve_data(struct bytecode_runtime
*runtime
,
32 size_t align
, size_t len
)
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
;
40 if (new_len
> FILTER_MAX_DATA_LEN
)
43 if (new_alloc_len
> old_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
);
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
;
56 runtime
->data_len
+= padding
;
57 ret
= runtime
->data_len
;
58 runtime
->data_len
+= len
;
62 static ssize_t
bytecode_push_data(struct bytecode_runtime
*runtime
,
63 const void *p
, size_t align
, size_t len
)
67 offset
= bytecode_reserve_data(runtime
, align
, len
);
70 memcpy(&runtime
->data
[offset
], p
, len
);
74 static int specialize_load_field(struct vstack_entry
*stack_top
,
79 switch (stack_top
->load
.type
) {
82 case LOAD_ROOT_CONTEXT
:
83 case LOAD_ROOT_APP_CONTEXT
:
84 case LOAD_ROOT_PAYLOAD
:
86 dbg_printk("Filter warning: cannot load root, missing field name.\n");
90 switch (stack_top
->load
.object_type
) {
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
;
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
;
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
;
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
;
116 dbg_printk("op load field u8\n");
117 stack_top
->type
= REG_S64
;
118 insn
->op
= FILTER_OP_LOAD_FIELD_U8
;
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
;
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
;
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
;
138 case OBJECT_TYPE_DOUBLE
:
139 printk(KERN_WARNING
"Double type unsupported\n\n");
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
;
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
;
152 case OBJECT_TYPE_DYNAMIC
:
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");
169 static int specialize_get_index_object_type(enum object_type
*otype
,
170 int signedness
, uint32_t elem_len
)
175 *otype
= OBJECT_TYPE_S8
;
177 *otype
= OBJECT_TYPE_U8
;
181 *otype
= OBJECT_TYPE_S16
;
183 *otype
= OBJECT_TYPE_U16
;
187 *otype
= OBJECT_TYPE_S32
;
189 *otype
= OBJECT_TYPE_U32
;
193 *otype
= OBJECT_TYPE_S64
;
195 *otype
= OBJECT_TYPE_U64
;
203 static int specialize_get_index(struct bytecode_runtime
*runtime
,
204 struct load_op
*insn
, uint64_t index
,
205 struct vstack_entry
*stack_top
,
209 struct filter_get_index_data gid
;
212 memset(&gid
, 0, sizeof(gid
));
213 switch (stack_top
->load
.type
) {
215 switch (stack_top
->load
.object_type
) {
216 case OBJECT_TYPE_ARRAY
:
218 const struct lttng_event_field
*field
;
219 uint32_t elem_len
, num_elems
;
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
) {
230 ret
= specialize_get_index_object_type(&stack_top
->load
.object_type
,
231 signedness
, elem_len
);
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
;
243 case OBJECT_TYPE_SEQUENCE
:
245 const struct lttng_event_field
*field
;
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
);
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
;
264 case OBJECT_TYPE_STRUCT
:
265 /* Only generated by the specialize phase. */
266 case OBJECT_TYPE_VARIANT
: /* Fall-through */
268 printk(KERN_WARNING
"Unexpected get index type %d",
269 (int) stack_top
->load
.object_type
);
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");
281 data_offset
= bytecode_push_data(runtime
, &gid
,
282 __alignof__(gid
), sizeof(gid
));
283 if (data_offset
< 0) {
289 ((struct get_index_u16
*) insn
->data
)->index
= data_offset
;
292 ((struct get_index_u64
*) insn
->data
)->index
= data_offset
;
305 static int specialize_context_lookup_name(struct bytecode_runtime
*bytecode
,
306 struct load_op
*insn
)
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
);
316 static int specialize_load_object(const struct lttng_event_field
*field
,
317 struct vstack_load
*load
, bool is_context
)
319 load
->type
= LOAD_OBJECT
;
321 * LTTng-UST layout all integer fields as s64 on the stack for the filter.
323 switch (field
->type
.atype
) {
325 if (field
->type
.u
.basic
.integer
.signedness
)
326 load
->object_type
= OBJECT_TYPE_S64
;
328 load
->object_type
= OBJECT_TYPE_U64
;
329 load
->rev_bo
= false;
333 const struct lttng_integer_type
*itype
=
334 &field
->type
.u
.basic
.enumeration
.container_type
;
336 if (itype
->signedness
)
337 load
->object_type
= OBJECT_TYPE_S64
;
339 load
->object_type
= OBJECT_TYPE_U64
;
340 load
->rev_bo
= false;
344 if (field
->type
.u
.array
.elem_type
.atype
!= atype_integer
) {
345 printk(KERN_WARNING
"Array nesting only supports integer types.\n");
349 load
->object_type
= OBJECT_TYPE_STRING
;
351 if (field
->type
.u
.array
.elem_type
.u
.basic
.integer
.encoding
== lttng_encode_none
) {
352 load
->object_type
= OBJECT_TYPE_ARRAY
;
355 load
->object_type
= OBJECT_TYPE_STRING_SEQUENCE
;
360 if (field
->type
.u
.sequence
.elem_type
.atype
!= atype_integer
) {
361 printk(KERN_WARNING
"Sequence nesting only supports integer types.\n");
365 load
->object_type
= OBJECT_TYPE_STRING
;
367 if (field
->type
.u
.sequence
.elem_type
.u
.basic
.integer
.encoding
== lttng_encode_none
) {
368 load
->object_type
= OBJECT_TYPE_SEQUENCE
;
371 load
->object_type
= OBJECT_TYPE_STRING_SEQUENCE
;
375 case atype_array_bitfield
:
376 printk(KERN_WARNING
"Bitfield array type is not supported.\n");
378 case atype_sequence_bitfield
:
379 printk(KERN_WARNING
"Bitfield sequence type is not supported.\n");
382 load
->object_type
= OBJECT_TYPE_STRING
;
385 printk(KERN_WARNING
"Structure type cannot be loaded.\n");
388 printk(KERN_WARNING
"Unknown type: %d", (int) field
->type
.atype
);
394 static int specialize_context_lookup(struct bytecode_runtime
*runtime
,
395 struct load_op
*insn
,
396 struct vstack_load
*load
)
399 struct lttng_ctx_field
*ctx_field
;
400 struct lttng_event_field
*field
;
401 struct filter_get_index_data gid
;
404 idx
= specialize_context_lookup_name(runtime
, insn
);
408 ctx_field
= <tng_static_ctx
->fields
[idx
];
409 field
= &ctx_field
->event_field
;
410 ret
= specialize_load_object(field
, load
, true);
413 /* Specialize each get_symbol into a get_index. */
414 insn
->op
= FILTER_OP_GET_INDEX_U16
;
415 memset(&gid
, 0, sizeof(gid
));
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) {
423 ((struct get_index_u16
*) insn
->data
)->index
= data_offset
;
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
)
434 const struct lttng_event_desc
*desc
= event
->desc
;
435 unsigned int i
, nr_fields
;
437 uint32_t field_offset
= 0;
438 const struct lttng_event_field
*field
;
440 struct filter_get_index_data gid
;
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
)) {
452 /* compute field offset on stack */
453 switch (field
->type
.atype
) {
456 field_offset
+= sizeof(int64_t);
460 case atype_array_bitfield
:
461 case atype_sequence_bitfield
:
462 field_offset
+= sizeof(unsigned long);
463 field_offset
+= sizeof(void *);
466 field_offset
+= sizeof(void *);
478 ret
= specialize_load_object(field
, load
, false);
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) {
493 ((struct get_index_u16
*) insn
->data
)->index
= data_offset
;
499 int lttng_filter_specialize_bytecode(struct lttng_event
*event
,
500 struct bytecode_runtime
*bytecode
)
502 void *pc
, *next_pc
, *start_pc
;
504 struct vstack _stack
;
505 struct vstack
*stack
= &_stack
;
509 start_pc
= &bytecode
->code
[0];
510 for (pc
= next_pc
= start_pc
; pc
- start_pc
< bytecode
->len
;
512 switch (*(filter_opcode_t
*) pc
) {
513 case FILTER_OP_UNKNOWN
:
515 printk(KERN_WARNING
"unknown bytecode op %u\n",
516 (unsigned int) *(filter_opcode_t
*) pc
);
520 case FILTER_OP_RETURN
:
529 case FILTER_OP_MINUS
:
530 printk(KERN_WARNING
"unsupported bytecode op %u\n",
531 (unsigned int) *(filter_opcode_t
*) pc
);
537 struct binary_op
*insn
= (struct binary_op
*) pc
;
539 switch(vstack_ax(stack
)->type
) {
541 printk(KERN_WARNING
"unknown register type\n");
546 if (vstack_bx(stack
)->type
== REG_STAR_GLOB_STRING
)
547 insn
->op
= FILTER_OP_EQ_STAR_GLOB_STRING
;
549 insn
->op
= FILTER_OP_EQ_STRING
;
551 case REG_STAR_GLOB_STRING
:
552 insn
->op
= FILTER_OP_EQ_STAR_GLOB_STRING
;
555 if (vstack_bx(stack
)->type
== REG_S64
)
556 insn
->op
= FILTER_OP_EQ_S64
;
558 insn
->op
= FILTER_OP_EQ_DOUBLE_S64
;
561 if (vstack_bx(stack
)->type
== REG_S64
)
562 insn
->op
= FILTER_OP_EQ_S64_DOUBLE
;
564 insn
->op
= FILTER_OP_EQ_DOUBLE
;
568 if (vstack_pop(stack
)) {
572 vstack_ax(stack
)->type
= REG_S64
;
573 next_pc
+= sizeof(struct binary_op
);
579 struct binary_op
*insn
= (struct binary_op
*) pc
;
581 switch(vstack_ax(stack
)->type
) {
583 printk(KERN_WARNING
"unknown register type\n");
588 if (vstack_bx(stack
)->type
== REG_STAR_GLOB_STRING
)
589 insn
->op
= FILTER_OP_NE_STAR_GLOB_STRING
;
591 insn
->op
= FILTER_OP_NE_STRING
;
593 case REG_STAR_GLOB_STRING
:
594 insn
->op
= FILTER_OP_NE_STAR_GLOB_STRING
;
597 if (vstack_bx(stack
)->type
== REG_S64
)
598 insn
->op
= FILTER_OP_NE_S64
;
600 insn
->op
= FILTER_OP_NE_DOUBLE_S64
;
603 if (vstack_bx(stack
)->type
== REG_S64
)
604 insn
->op
= FILTER_OP_NE_S64_DOUBLE
;
606 insn
->op
= FILTER_OP_NE_DOUBLE
;
610 if (vstack_pop(stack
)) {
614 vstack_ax(stack
)->type
= REG_S64
;
615 next_pc
+= sizeof(struct binary_op
);
621 struct binary_op
*insn
= (struct binary_op
*) pc
;
623 switch(vstack_ax(stack
)->type
) {
625 printk(KERN_WARNING
"unknown register type\n");
629 case REG_STAR_GLOB_STRING
:
630 printk(KERN_WARNING
"invalid register type for > binary operator\n");
634 insn
->op
= FILTER_OP_GT_STRING
;
637 if (vstack_bx(stack
)->type
== REG_S64
)
638 insn
->op
= FILTER_OP_GT_S64
;
640 insn
->op
= FILTER_OP_GT_DOUBLE_S64
;
643 if (vstack_bx(stack
)->type
== REG_S64
)
644 insn
->op
= FILTER_OP_GT_S64_DOUBLE
;
646 insn
->op
= FILTER_OP_GT_DOUBLE
;
650 if (vstack_pop(stack
)) {
654 vstack_ax(stack
)->type
= REG_S64
;
655 next_pc
+= sizeof(struct binary_op
);
661 struct binary_op
*insn
= (struct binary_op
*) pc
;
663 switch(vstack_ax(stack
)->type
) {
665 printk(KERN_WARNING
"unknown register type\n");
669 case REG_STAR_GLOB_STRING
:
670 printk(KERN_WARNING
"invalid register type for < binary operator\n");
674 insn
->op
= FILTER_OP_LT_STRING
;
677 if (vstack_bx(stack
)->type
== REG_S64
)
678 insn
->op
= FILTER_OP_LT_S64
;
680 insn
->op
= FILTER_OP_LT_DOUBLE_S64
;
683 if (vstack_bx(stack
)->type
== REG_S64
)
684 insn
->op
= FILTER_OP_LT_S64_DOUBLE
;
686 insn
->op
= FILTER_OP_LT_DOUBLE
;
690 if (vstack_pop(stack
)) {
694 vstack_ax(stack
)->type
= REG_S64
;
695 next_pc
+= sizeof(struct binary_op
);
701 struct binary_op
*insn
= (struct binary_op
*) pc
;
703 switch(vstack_ax(stack
)->type
) {
705 printk(KERN_WARNING
"unknown register type\n");
709 case REG_STAR_GLOB_STRING
:
710 printk(KERN_WARNING
"invalid register type for >= binary operator\n");
714 insn
->op
= FILTER_OP_GE_STRING
;
717 if (vstack_bx(stack
)->type
== REG_S64
)
718 insn
->op
= FILTER_OP_GE_S64
;
720 insn
->op
= FILTER_OP_GE_DOUBLE_S64
;
723 if (vstack_bx(stack
)->type
== REG_S64
)
724 insn
->op
= FILTER_OP_GE_S64_DOUBLE
;
726 insn
->op
= FILTER_OP_GE_DOUBLE
;
730 if (vstack_pop(stack
)) {
734 vstack_ax(stack
)->type
= REG_S64
;
735 next_pc
+= sizeof(struct binary_op
);
740 struct binary_op
*insn
= (struct binary_op
*) pc
;
742 switch(vstack_ax(stack
)->type
) {
744 printk(KERN_WARNING
"unknown register type\n");
748 case REG_STAR_GLOB_STRING
:
749 printk(KERN_WARNING
"invalid register type for <= binary operator\n");
753 insn
->op
= FILTER_OP_LE_STRING
;
756 if (vstack_bx(stack
)->type
== REG_S64
)
757 insn
->op
= FILTER_OP_LE_S64
;
759 insn
->op
= FILTER_OP_LE_DOUBLE_S64
;
762 if (vstack_bx(stack
)->type
== REG_S64
)
763 insn
->op
= FILTER_OP_LE_S64_DOUBLE
;
765 insn
->op
= FILTER_OP_LE_DOUBLE
;
768 vstack_ax(stack
)->type
= REG_S64
;
769 next_pc
+= sizeof(struct binary_op
);
773 case FILTER_OP_EQ_STRING
:
774 case FILTER_OP_NE_STRING
:
775 case FILTER_OP_GT_STRING
:
776 case FILTER_OP_LT_STRING
:
777 case FILTER_OP_GE_STRING
:
778 case FILTER_OP_LE_STRING
:
779 case FILTER_OP_EQ_STAR_GLOB_STRING
:
780 case FILTER_OP_NE_STAR_GLOB_STRING
:
781 case FILTER_OP_EQ_S64
:
782 case FILTER_OP_NE_S64
:
783 case FILTER_OP_GT_S64
:
784 case FILTER_OP_LT_S64
:
785 case FILTER_OP_GE_S64
:
786 case FILTER_OP_LE_S64
:
787 case FILTER_OP_EQ_DOUBLE
:
788 case FILTER_OP_NE_DOUBLE
:
789 case FILTER_OP_GT_DOUBLE
:
790 case FILTER_OP_LT_DOUBLE
:
791 case FILTER_OP_GE_DOUBLE
:
792 case FILTER_OP_LE_DOUBLE
:
793 case FILTER_OP_EQ_DOUBLE_S64
:
794 case FILTER_OP_NE_DOUBLE_S64
:
795 case FILTER_OP_GT_DOUBLE_S64
:
796 case FILTER_OP_LT_DOUBLE_S64
:
797 case FILTER_OP_GE_DOUBLE_S64
:
798 case FILTER_OP_LE_DOUBLE_S64
:
799 case FILTER_OP_EQ_S64_DOUBLE
:
800 case FILTER_OP_NE_S64_DOUBLE
:
801 case FILTER_OP_GT_S64_DOUBLE
:
802 case FILTER_OP_LT_S64_DOUBLE
:
803 case FILTER_OP_GE_S64_DOUBLE
:
804 case FILTER_OP_LE_S64_DOUBLE
:
805 case FILTER_OP_BIT_RSHIFT
:
806 case FILTER_OP_BIT_LSHIFT
:
807 case FILTER_OP_BIT_AND
:
808 case FILTER_OP_BIT_OR
:
809 case FILTER_OP_BIT_XOR
:
812 if (vstack_pop(stack
)) {
816 vstack_ax(stack
)->type
= REG_S64
;
817 next_pc
+= sizeof(struct binary_op
);
822 case FILTER_OP_UNARY_PLUS
:
824 struct unary_op
*insn
= (struct unary_op
*) pc
;
826 switch(vstack_ax(stack
)->type
) {
828 printk(KERN_WARNING
"unknown register type\n");
833 insn
->op
= FILTER_OP_UNARY_PLUS_S64
;
836 insn
->op
= FILTER_OP_UNARY_PLUS_DOUBLE
;
840 next_pc
+= sizeof(struct unary_op
);
844 case FILTER_OP_UNARY_MINUS
:
846 struct unary_op
*insn
= (struct unary_op
*) pc
;
848 switch(vstack_ax(stack
)->type
) {
850 printk(KERN_WARNING
"unknown register type\n");
855 insn
->op
= FILTER_OP_UNARY_MINUS_S64
;
858 insn
->op
= FILTER_OP_UNARY_MINUS_DOUBLE
;
862 next_pc
+= sizeof(struct unary_op
);
866 case FILTER_OP_UNARY_NOT
:
868 struct unary_op
*insn
= (struct unary_op
*) pc
;
870 switch(vstack_ax(stack
)->type
) {
872 printk(KERN_WARNING
"unknown register type\n");
877 insn
->op
= FILTER_OP_UNARY_NOT_S64
;
880 insn
->op
= FILTER_OP_UNARY_NOT_DOUBLE
;
884 next_pc
+= sizeof(struct unary_op
);
888 case FILTER_OP_UNARY_BIT_NOT
:
891 next_pc
+= sizeof(struct unary_op
);
895 case FILTER_OP_UNARY_PLUS_S64
:
896 case FILTER_OP_UNARY_MINUS_S64
:
897 case FILTER_OP_UNARY_NOT_S64
:
898 case FILTER_OP_UNARY_PLUS_DOUBLE
:
899 case FILTER_OP_UNARY_MINUS_DOUBLE
:
900 case FILTER_OP_UNARY_NOT_DOUBLE
:
903 next_pc
+= sizeof(struct unary_op
);
911 /* Continue to next instruction */
912 /* Pop 1 when jump not taken */
913 if (vstack_pop(stack
)) {
917 next_pc
+= sizeof(struct logical_op
);
922 case FILTER_OP_LOAD_FIELD_REF
:
924 printk(KERN_WARNING
"Unknown field ref type\n");
928 /* get context ref */
929 case FILTER_OP_GET_CONTEXT_REF
:
931 printk(KERN_WARNING
"Unknown get context ref type\n");
935 case FILTER_OP_LOAD_FIELD_REF_STRING
:
936 case FILTER_OP_LOAD_FIELD_REF_SEQUENCE
:
937 case FILTER_OP_GET_CONTEXT_REF_STRING
:
938 case FILTER_OP_LOAD_FIELD_REF_USER_STRING
:
939 case FILTER_OP_LOAD_FIELD_REF_USER_SEQUENCE
:
941 if (vstack_push(stack
)) {
945 vstack_ax(stack
)->type
= REG_STRING
;
946 next_pc
+= sizeof(struct load_op
) + sizeof(struct field_ref
);
949 case FILTER_OP_LOAD_FIELD_REF_S64
:
950 case FILTER_OP_GET_CONTEXT_REF_S64
:
952 if (vstack_push(stack
)) {
956 vstack_ax(stack
)->type
= REG_S64
;
957 next_pc
+= sizeof(struct load_op
) + sizeof(struct field_ref
);
960 case FILTER_OP_LOAD_FIELD_REF_DOUBLE
:
961 case FILTER_OP_GET_CONTEXT_REF_DOUBLE
:
963 if (vstack_push(stack
)) {
967 vstack_ax(stack
)->type
= REG_DOUBLE
;
968 next_pc
+= sizeof(struct load_op
) + sizeof(struct field_ref
);
972 /* load from immediate operand */
973 case FILTER_OP_LOAD_STRING
:
975 struct load_op
*insn
= (struct load_op
*) pc
;
977 if (vstack_push(stack
)) {
981 vstack_ax(stack
)->type
= REG_STRING
;
982 next_pc
+= sizeof(struct load_op
) + strlen(insn
->data
) + 1;
986 case FILTER_OP_LOAD_STAR_GLOB_STRING
:
988 struct load_op
*insn
= (struct load_op
*) pc
;
990 if (vstack_push(stack
)) {
994 vstack_ax(stack
)->type
= REG_STAR_GLOB_STRING
;
995 next_pc
+= sizeof(struct load_op
) + strlen(insn
->data
) + 1;
999 case FILTER_OP_LOAD_S64
:
1001 if (vstack_push(stack
)) {
1005 vstack_ax(stack
)->type
= REG_S64
;
1006 next_pc
+= sizeof(struct load_op
)
1007 + sizeof(struct literal_numeric
);
1011 case FILTER_OP_LOAD_DOUBLE
:
1013 if (vstack_push(stack
)) {
1017 vstack_ax(stack
)->type
= REG_DOUBLE
;
1018 next_pc
+= sizeof(struct load_op
)
1019 + sizeof(struct literal_double
);
1024 case FILTER_OP_CAST_TO_S64
:
1026 struct cast_op
*insn
= (struct cast_op
*) pc
;
1028 switch (vstack_ax(stack
)->type
) {
1030 printk(KERN_WARNING
"unknown register type\n");
1035 case REG_STAR_GLOB_STRING
:
1036 printk(KERN_WARNING
"Cast op can only be applied to numeric or floating point registers\n");
1040 insn
->op
= FILTER_OP_CAST_NOP
;
1043 insn
->op
= FILTER_OP_CAST_DOUBLE_TO_S64
;
1047 vstack_ax(stack
)->type
= REG_S64
;
1048 next_pc
+= sizeof(struct cast_op
);
1051 case FILTER_OP_CAST_DOUBLE_TO_S64
:
1054 vstack_ax(stack
)->type
= REG_S64
;
1055 next_pc
+= sizeof(struct cast_op
);
1058 case FILTER_OP_CAST_NOP
:
1060 next_pc
+= sizeof(struct cast_op
);
1065 * Instructions for recursive traversal through composed types.
1067 case FILTER_OP_GET_CONTEXT_ROOT
:
1069 if (vstack_push(stack
)) {
1073 vstack_ax(stack
)->type
= REG_PTR
;
1074 vstack_ax(stack
)->load
.type
= LOAD_ROOT_CONTEXT
;
1075 next_pc
+= sizeof(struct load_op
);
1078 case FILTER_OP_GET_APP_CONTEXT_ROOT
:
1080 if (vstack_push(stack
)) {
1084 vstack_ax(stack
)->type
= REG_PTR
;
1085 vstack_ax(stack
)->load
.type
= LOAD_ROOT_APP_CONTEXT
;
1086 next_pc
+= sizeof(struct load_op
);
1089 case FILTER_OP_GET_PAYLOAD_ROOT
:
1091 if (vstack_push(stack
)) {
1095 vstack_ax(stack
)->type
= REG_PTR
;
1096 vstack_ax(stack
)->load
.type
= LOAD_ROOT_PAYLOAD
;
1097 next_pc
+= sizeof(struct load_op
);
1101 case FILTER_OP_LOAD_FIELD
:
1103 struct load_op
*insn
= (struct load_op
*) pc
;
1105 WARN_ON_ONCE(vstack_ax(stack
)->type
!= REG_PTR
);
1107 ret
= specialize_load_field(vstack_ax(stack
), insn
);
1111 next_pc
+= sizeof(struct load_op
);
1115 case FILTER_OP_LOAD_FIELD_S8
:
1116 case FILTER_OP_LOAD_FIELD_S16
:
1117 case FILTER_OP_LOAD_FIELD_S32
:
1118 case FILTER_OP_LOAD_FIELD_S64
:
1119 case FILTER_OP_LOAD_FIELD_U8
:
1120 case FILTER_OP_LOAD_FIELD_U16
:
1121 case FILTER_OP_LOAD_FIELD_U32
:
1122 case FILTER_OP_LOAD_FIELD_U64
:
1125 vstack_ax(stack
)->type
= REG_S64
;
1126 next_pc
+= sizeof(struct load_op
);
1130 case FILTER_OP_LOAD_FIELD_STRING
:
1131 case FILTER_OP_LOAD_FIELD_SEQUENCE
:
1134 vstack_ax(stack
)->type
= REG_STRING
;
1135 next_pc
+= sizeof(struct load_op
);
1139 case FILTER_OP_LOAD_FIELD_DOUBLE
:
1142 vstack_ax(stack
)->type
= REG_DOUBLE
;
1143 next_pc
+= sizeof(struct load_op
);
1147 case FILTER_OP_GET_SYMBOL
:
1149 struct load_op
*insn
= (struct load_op
*) pc
;
1151 dbg_printk("op get symbol\n");
1152 switch (vstack_ax(stack
)->load
.type
) {
1154 printk(KERN_WARNING
"Nested fields not implemented yet.\n");
1157 case LOAD_ROOT_CONTEXT
:
1158 /* Lookup context field. */
1159 ret
= specialize_context_lookup(bytecode
, insn
,
1160 &vstack_ax(stack
)->load
);
1164 case LOAD_ROOT_APP_CONTEXT
:
1167 case LOAD_ROOT_PAYLOAD
:
1168 /* Lookup event payload field. */
1169 ret
= specialize_event_payload_lookup(event
,
1171 &vstack_ax(stack
)->load
);
1176 next_pc
+= sizeof(struct load_op
) + sizeof(struct get_symbol
);
1180 case FILTER_OP_GET_SYMBOL_FIELD
:
1182 /* Always generated by specialize phase. */
1187 case FILTER_OP_GET_INDEX_U16
:
1189 struct load_op
*insn
= (struct load_op
*) pc
;
1190 struct get_index_u16
*index
= (struct get_index_u16
*) insn
->data
;
1192 dbg_printk("op get index u16\n");
1194 ret
= specialize_get_index(bytecode
, insn
, index
->index
,
1195 vstack_ax(stack
), sizeof(*index
));
1198 next_pc
+= sizeof(struct load_op
) + sizeof(struct get_index_u16
);
1202 case FILTER_OP_GET_INDEX_U64
:
1204 struct load_op
*insn
= (struct load_op
*) pc
;
1205 struct get_index_u64
*index
= (struct get_index_u64
*) insn
->data
;
1207 dbg_printk("op get index u64\n");
1209 ret
= specialize_get_index(bytecode
, insn
, index
->index
,
1210 vstack_ax(stack
), sizeof(*index
));
1213 next_pc
+= sizeof(struct load_op
) + sizeof(struct get_index_u64
);