1 /* SPDX-License-Identifier: MIT
3 * lttng-filter-specialize.c
5 * LTTng modules filter code specializer.
7 * Copyright (C) 2010-2016 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
10 #include <linux/slab.h>
11 #include <lttng-filter.h>
12 #include <lttng/align.h>
14 static ssize_t
bytecode_reserve_data(struct bytecode_runtime
*runtime
,
15 size_t align
, size_t len
)
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
;
23 if (new_len
> FILTER_MAX_DATA_LEN
)
26 if (new_alloc_len
> old_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
);
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
;
39 runtime
->data_len
+= padding
;
40 ret
= runtime
->data_len
;
41 runtime
->data_len
+= len
;
45 static ssize_t
bytecode_push_data(struct bytecode_runtime
*runtime
,
46 const void *p
, size_t align
, size_t len
)
50 offset
= bytecode_reserve_data(runtime
, align
, len
);
53 memcpy(&runtime
->data
[offset
], p
, len
);
57 static int specialize_load_field(struct vstack_entry
*stack_top
,
62 switch (stack_top
->load
.type
) {
65 case LOAD_ROOT_CONTEXT
:
66 case LOAD_ROOT_APP_CONTEXT
:
67 case LOAD_ROOT_PAYLOAD
:
69 dbg_printk("Filter warning: cannot load root, missing field name.\n");
73 switch (stack_top
->load
.object_type
) {
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
;
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
;
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
;
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
;
99 dbg_printk("op load field u8\n");
100 stack_top
->type
= REG_S64
;
101 insn
->op
= FILTER_OP_LOAD_FIELD_U8
;
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
;
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
;
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
;
121 case OBJECT_TYPE_DOUBLE
:
122 printk(KERN_WARNING
"Double type unsupported\n\n");
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
;
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
;
135 case OBJECT_TYPE_DYNAMIC
:
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");
152 static int specialize_get_index_object_type(enum object_type
*otype
,
153 int signedness
, uint32_t elem_len
)
158 *otype
= OBJECT_TYPE_S8
;
160 *otype
= OBJECT_TYPE_U8
;
164 *otype
= OBJECT_TYPE_S16
;
166 *otype
= OBJECT_TYPE_U16
;
170 *otype
= OBJECT_TYPE_S32
;
172 *otype
= OBJECT_TYPE_U32
;
176 *otype
= OBJECT_TYPE_S64
;
178 *otype
= OBJECT_TYPE_U64
;
186 static int specialize_get_index(struct bytecode_runtime
*runtime
,
187 struct load_op
*insn
, uint64_t index
,
188 struct vstack_entry
*stack_top
,
192 struct filter_get_index_data gid
;
195 memset(&gid
, 0, sizeof(gid
));
196 switch (stack_top
->load
.type
) {
198 switch (stack_top
->load
.object_type
) {
199 case OBJECT_TYPE_ARRAY
:
201 const struct lttng_integer_type
*integer_type
;
202 const struct lttng_event_field
*field
;
203 uint32_t elem_len
, num_elems
;
206 field
= stack_top
->load
.field
;
207 if (!lttng_is_bytewise_integer(field
->type
.u
.array_nestable
.elem_type
)) {
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
;
215 if (index
>= num_elems
) {
219 ret
= specialize_get_index_object_type(&stack_top
->load
.object_type
,
220 signedness
, elem_len
);
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
;
227 if (integer_type
->reverse_byte_order
)
228 gid
.elem
.rev_bo
= true;
229 stack_top
->load
.rev_bo
= gid
.elem
.rev_bo
;
232 case OBJECT_TYPE_SEQUENCE
:
234 const struct lttng_integer_type
*integer_type
;
235 const struct lttng_event_field
*field
;
239 field
= stack_top
->load
.field
;
240 if (!lttng_is_bytewise_integer(field
->type
.u
.sequence_nestable
.elem_type
)) {
244 integer_type
= &field
->type
.u
.sequence_nestable
.elem_type
->u
.integer
;
245 elem_len
= integer_type
->size
;
246 signedness
= integer_type
->signedness
;
247 ret
= specialize_get_index_object_type(&stack_top
->load
.object_type
,
248 signedness
, elem_len
);
251 gid
.offset
= index
* (elem_len
/ CHAR_BIT
);
252 gid
.elem
.type
= stack_top
->load
.object_type
;
253 gid
.elem
.len
= elem_len
;
254 if (integer_type
->reverse_byte_order
)
255 gid
.elem
.rev_bo
= true;
256 stack_top
->load
.rev_bo
= gid
.elem
.rev_bo
;
259 case OBJECT_TYPE_STRUCT
:
260 /* Only generated by the specialize phase. */
261 case OBJECT_TYPE_VARIANT
: /* Fall-through */
263 printk(KERN_WARNING
"Unexpected get index type %d",
264 (int) stack_top
->load
.object_type
);
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");
276 data_offset
= bytecode_push_data(runtime
, &gid
,
277 __alignof__(gid
), sizeof(gid
));
278 if (data_offset
< 0) {
284 ((struct get_index_u16
*) insn
->data
)->index
= data_offset
;
287 ((struct get_index_u64
*) insn
->data
)->index
= data_offset
;
300 static int specialize_context_lookup_name(struct bytecode_runtime
*bytecode
,
301 struct load_op
*insn
)
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
);
311 static int specialize_load_object(const struct lttng_event_field
*field
,
312 struct vstack_load
*load
, bool is_context
)
314 load
->type
= LOAD_OBJECT
;
316 * LTTng-UST layout all integer fields as s64 on the stack for the filter.
318 switch (field
->type
.atype
) {
320 if (field
->type
.u
.integer
.signedness
)
321 load
->object_type
= OBJECT_TYPE_S64
;
323 load
->object_type
= OBJECT_TYPE_U64
;
324 load
->rev_bo
= false;
326 case atype_enum_nestable
:
328 const struct lttng_integer_type
*itype
=
329 &field
->type
.u
.enum_nestable
.container_type
->u
.integer
;
331 if (itype
->signedness
)
332 load
->object_type
= OBJECT_TYPE_S64
;
334 load
->object_type
= OBJECT_TYPE_U64
;
335 load
->rev_bo
= false;
338 case atype_array_nestable
:
339 if (!lttng_is_bytewise_integer(field
->type
.u
.array_nestable
.elem_type
)) {
340 printk(KERN_WARNING
"Array nesting only supports integer types.\n");
344 load
->object_type
= OBJECT_TYPE_STRING
;
346 if (field
->type
.u
.array_nestable
.elem_type
->u
.integer
.encoding
== lttng_encode_none
) {
347 load
->object_type
= OBJECT_TYPE_ARRAY
;
350 load
->object_type
= OBJECT_TYPE_STRING_SEQUENCE
;
354 case atype_sequence_nestable
:
355 if (!lttng_is_bytewise_integer(field
->type
.u
.sequence_nestable
.elem_type
)) {
356 printk(KERN_WARNING
"Sequence nesting only supports integer types.\n");
360 load
->object_type
= OBJECT_TYPE_STRING
;
362 if (field
->type
.u
.sequence_nestable
.elem_type
->u
.integer
.encoding
== lttng_encode_none
) {
363 load
->object_type
= OBJECT_TYPE_SEQUENCE
;
366 load
->object_type
= OBJECT_TYPE_STRING_SEQUENCE
;
371 load
->object_type
= OBJECT_TYPE_STRING
;
373 case atype_struct_nestable
:
374 printk(KERN_WARNING
"Structure type cannot be loaded.\n");
376 case atype_variant_nestable
:
377 printk(KERN_WARNING
"Variant type cannot be loaded.\n");
380 printk(KERN_WARNING
"Unknown type: %d", (int) field
->type
.atype
);
386 static int specialize_context_lookup(struct bytecode_runtime
*runtime
,
387 struct load_op
*insn
,
388 struct vstack_load
*load
)
391 struct lttng_ctx_field
*ctx_field
;
392 struct lttng_event_field
*field
;
393 struct filter_get_index_data gid
;
396 idx
= specialize_context_lookup_name(runtime
, insn
);
400 ctx_field
= <tng_static_ctx
->fields
[idx
];
401 field
= &ctx_field
->event_field
;
402 ret
= specialize_load_object(field
, load
, true);
405 /* Specialize each get_symbol into a get_index. */
406 insn
->op
= FILTER_OP_GET_INDEX_U16
;
407 memset(&gid
, 0, sizeof(gid
));
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) {
415 ((struct get_index_u16
*) insn
->data
)->index
= data_offset
;
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
)
426 const struct lttng_event_desc
*desc
= event
->desc
;
427 unsigned int i
, nr_fields
;
429 uint32_t field_offset
= 0;
430 const struct lttng_event_field
*field
;
432 struct filter_get_index_data gid
;
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
];
440 if (field
->nofilter
) {
443 if (!strcmp(field
->name
, name
)) {
447 /* compute field offset on stack */
448 switch (field
->type
.atype
) {
450 case atype_enum_nestable
:
451 field_offset
+= sizeof(int64_t);
453 case atype_array_nestable
:
454 case atype_sequence_nestable
:
455 field_offset
+= sizeof(unsigned long);
456 field_offset
+= sizeof(void *);
459 field_offset
+= sizeof(void *);
471 ret
= specialize_load_object(field
, load
, false);
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) {
486 ((struct get_index_u16
*) insn
->data
)->index
= data_offset
;
492 int lttng_filter_specialize_bytecode(struct lttng_event
*event
,
493 struct bytecode_runtime
*bytecode
)
495 void *pc
, *next_pc
, *start_pc
;
497 struct vstack _stack
;
498 struct vstack
*stack
= &_stack
;
502 start_pc
= &bytecode
->code
[0];
503 for (pc
= next_pc
= start_pc
; pc
- start_pc
< bytecode
->len
;
505 switch (*(filter_opcode_t
*) pc
) {
506 case FILTER_OP_UNKNOWN
:
508 printk(KERN_WARNING
"unknown bytecode op %u\n",
509 (unsigned int) *(filter_opcode_t
*) pc
);
513 case FILTER_OP_RETURN
:
514 case FILTER_OP_RETURN_S64
:
523 case FILTER_OP_MINUS
:
524 printk(KERN_WARNING
"unsupported bytecode op %u\n",
525 (unsigned int) *(filter_opcode_t
*) pc
);
531 struct binary_op
*insn
= (struct binary_op
*) pc
;
533 switch(vstack_ax(stack
)->type
) {
535 printk(KERN_WARNING
"unknown register type\n");
540 if (vstack_bx(stack
)->type
== REG_STAR_GLOB_STRING
)
541 insn
->op
= FILTER_OP_EQ_STAR_GLOB_STRING
;
543 insn
->op
= FILTER_OP_EQ_STRING
;
545 case REG_STAR_GLOB_STRING
:
546 insn
->op
= FILTER_OP_EQ_STAR_GLOB_STRING
;
549 if (vstack_bx(stack
)->type
== REG_S64
)
550 insn
->op
= FILTER_OP_EQ_S64
;
552 insn
->op
= FILTER_OP_EQ_DOUBLE_S64
;
555 if (vstack_bx(stack
)->type
== REG_S64
)
556 insn
->op
= FILTER_OP_EQ_S64_DOUBLE
;
558 insn
->op
= FILTER_OP_EQ_DOUBLE
;
562 if (vstack_pop(stack
)) {
566 vstack_ax(stack
)->type
= REG_S64
;
567 next_pc
+= sizeof(struct binary_op
);
573 struct binary_op
*insn
= (struct binary_op
*) pc
;
575 switch(vstack_ax(stack
)->type
) {
577 printk(KERN_WARNING
"unknown register type\n");
582 if (vstack_bx(stack
)->type
== REG_STAR_GLOB_STRING
)
583 insn
->op
= FILTER_OP_NE_STAR_GLOB_STRING
;
585 insn
->op
= FILTER_OP_NE_STRING
;
587 case REG_STAR_GLOB_STRING
:
588 insn
->op
= FILTER_OP_NE_STAR_GLOB_STRING
;
591 if (vstack_bx(stack
)->type
== REG_S64
)
592 insn
->op
= FILTER_OP_NE_S64
;
594 insn
->op
= FILTER_OP_NE_DOUBLE_S64
;
597 if (vstack_bx(stack
)->type
== REG_S64
)
598 insn
->op
= FILTER_OP_NE_S64_DOUBLE
;
600 insn
->op
= FILTER_OP_NE_DOUBLE
;
604 if (vstack_pop(stack
)) {
608 vstack_ax(stack
)->type
= REG_S64
;
609 next_pc
+= sizeof(struct binary_op
);
615 struct binary_op
*insn
= (struct binary_op
*) pc
;
617 switch(vstack_ax(stack
)->type
) {
619 printk(KERN_WARNING
"unknown register type\n");
623 case REG_STAR_GLOB_STRING
:
624 printk(KERN_WARNING
"invalid register type for > binary operator\n");
628 insn
->op
= FILTER_OP_GT_STRING
;
631 if (vstack_bx(stack
)->type
== REG_S64
)
632 insn
->op
= FILTER_OP_GT_S64
;
634 insn
->op
= FILTER_OP_GT_DOUBLE_S64
;
637 if (vstack_bx(stack
)->type
== REG_S64
)
638 insn
->op
= FILTER_OP_GT_S64_DOUBLE
;
640 insn
->op
= FILTER_OP_GT_DOUBLE
;
644 if (vstack_pop(stack
)) {
648 vstack_ax(stack
)->type
= REG_S64
;
649 next_pc
+= sizeof(struct binary_op
);
655 struct binary_op
*insn
= (struct binary_op
*) pc
;
657 switch(vstack_ax(stack
)->type
) {
659 printk(KERN_WARNING
"unknown register type\n");
663 case REG_STAR_GLOB_STRING
:
664 printk(KERN_WARNING
"invalid register type for < binary operator\n");
668 insn
->op
= FILTER_OP_LT_STRING
;
671 if (vstack_bx(stack
)->type
== REG_S64
)
672 insn
->op
= FILTER_OP_LT_S64
;
674 insn
->op
= FILTER_OP_LT_DOUBLE_S64
;
677 if (vstack_bx(stack
)->type
== REG_S64
)
678 insn
->op
= FILTER_OP_LT_S64_DOUBLE
;
680 insn
->op
= FILTER_OP_LT_DOUBLE
;
684 if (vstack_pop(stack
)) {
688 vstack_ax(stack
)->type
= REG_S64
;
689 next_pc
+= sizeof(struct binary_op
);
695 struct binary_op
*insn
= (struct binary_op
*) pc
;
697 switch(vstack_ax(stack
)->type
) {
699 printk(KERN_WARNING
"unknown register type\n");
703 case REG_STAR_GLOB_STRING
:
704 printk(KERN_WARNING
"invalid register type for >= binary operator\n");
708 insn
->op
= FILTER_OP_GE_STRING
;
711 if (vstack_bx(stack
)->type
== REG_S64
)
712 insn
->op
= FILTER_OP_GE_S64
;
714 insn
->op
= FILTER_OP_GE_DOUBLE_S64
;
717 if (vstack_bx(stack
)->type
== REG_S64
)
718 insn
->op
= FILTER_OP_GE_S64_DOUBLE
;
720 insn
->op
= FILTER_OP_GE_DOUBLE
;
724 if (vstack_pop(stack
)) {
728 vstack_ax(stack
)->type
= REG_S64
;
729 next_pc
+= sizeof(struct binary_op
);
734 struct binary_op
*insn
= (struct binary_op
*) pc
;
736 switch(vstack_ax(stack
)->type
) {
738 printk(KERN_WARNING
"unknown register type\n");
742 case REG_STAR_GLOB_STRING
:
743 printk(KERN_WARNING
"invalid register type for <= binary operator\n");
747 insn
->op
= FILTER_OP_LE_STRING
;
750 if (vstack_bx(stack
)->type
== REG_S64
)
751 insn
->op
= FILTER_OP_LE_S64
;
753 insn
->op
= FILTER_OP_LE_DOUBLE_S64
;
756 if (vstack_bx(stack
)->type
== REG_S64
)
757 insn
->op
= FILTER_OP_LE_S64_DOUBLE
;
759 insn
->op
= FILTER_OP_LE_DOUBLE
;
762 vstack_ax(stack
)->type
= REG_S64
;
763 next_pc
+= sizeof(struct binary_op
);
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
:
773 case FILTER_OP_EQ_STAR_GLOB_STRING
:
774 case FILTER_OP_NE_STAR_GLOB_STRING
:
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
:
799 case FILTER_OP_BIT_RSHIFT
:
800 case FILTER_OP_BIT_LSHIFT
:
801 case FILTER_OP_BIT_AND
:
802 case FILTER_OP_BIT_OR
:
803 case FILTER_OP_BIT_XOR
:
806 if (vstack_pop(stack
)) {
810 vstack_ax(stack
)->type
= REG_S64
;
811 next_pc
+= sizeof(struct binary_op
);
816 case FILTER_OP_UNARY_PLUS
:
818 struct unary_op
*insn
= (struct unary_op
*) pc
;
820 switch(vstack_ax(stack
)->type
) {
822 printk(KERN_WARNING
"unknown register type\n");
827 insn
->op
= FILTER_OP_UNARY_PLUS_S64
;
830 insn
->op
= FILTER_OP_UNARY_PLUS_DOUBLE
;
834 next_pc
+= sizeof(struct unary_op
);
838 case FILTER_OP_UNARY_MINUS
:
840 struct unary_op
*insn
= (struct unary_op
*) pc
;
842 switch(vstack_ax(stack
)->type
) {
844 printk(KERN_WARNING
"unknown register type\n");
849 insn
->op
= FILTER_OP_UNARY_MINUS_S64
;
852 insn
->op
= FILTER_OP_UNARY_MINUS_DOUBLE
;
856 next_pc
+= sizeof(struct unary_op
);
860 case FILTER_OP_UNARY_NOT
:
862 struct unary_op
*insn
= (struct unary_op
*) pc
;
864 switch(vstack_ax(stack
)->type
) {
866 printk(KERN_WARNING
"unknown register type\n");
871 insn
->op
= FILTER_OP_UNARY_NOT_S64
;
874 insn
->op
= FILTER_OP_UNARY_NOT_DOUBLE
;
878 next_pc
+= sizeof(struct unary_op
);
882 case FILTER_OP_UNARY_BIT_NOT
:
885 next_pc
+= sizeof(struct unary_op
);
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
:
897 next_pc
+= sizeof(struct unary_op
);
905 /* Continue to next instruction */
906 /* Pop 1 when jump not taken */
907 if (vstack_pop(stack
)) {
911 next_pc
+= sizeof(struct logical_op
);
916 case FILTER_OP_LOAD_FIELD_REF
:
918 printk(KERN_WARNING
"Unknown field ref type\n");
922 /* get context ref */
923 case FILTER_OP_GET_CONTEXT_REF
:
925 printk(KERN_WARNING
"Unknown get context ref type\n");
929 case FILTER_OP_LOAD_FIELD_REF_STRING
:
930 case FILTER_OP_LOAD_FIELD_REF_SEQUENCE
:
931 case FILTER_OP_GET_CONTEXT_REF_STRING
:
932 case FILTER_OP_LOAD_FIELD_REF_USER_STRING
:
933 case FILTER_OP_LOAD_FIELD_REF_USER_SEQUENCE
:
935 if (vstack_push(stack
)) {
939 vstack_ax(stack
)->type
= REG_STRING
;
940 next_pc
+= sizeof(struct load_op
) + sizeof(struct field_ref
);
943 case FILTER_OP_LOAD_FIELD_REF_S64
:
944 case FILTER_OP_GET_CONTEXT_REF_S64
:
946 if (vstack_push(stack
)) {
950 vstack_ax(stack
)->type
= REG_S64
;
951 next_pc
+= sizeof(struct load_op
) + sizeof(struct field_ref
);
954 case FILTER_OP_LOAD_FIELD_REF_DOUBLE
:
955 case FILTER_OP_GET_CONTEXT_REF_DOUBLE
:
957 if (vstack_push(stack
)) {
961 vstack_ax(stack
)->type
= REG_DOUBLE
;
962 next_pc
+= sizeof(struct load_op
) + sizeof(struct field_ref
);
966 /* load from immediate operand */
967 case FILTER_OP_LOAD_STRING
:
969 struct load_op
*insn
= (struct load_op
*) pc
;
971 if (vstack_push(stack
)) {
975 vstack_ax(stack
)->type
= REG_STRING
;
976 next_pc
+= sizeof(struct load_op
) + strlen(insn
->data
) + 1;
980 case FILTER_OP_LOAD_STAR_GLOB_STRING
:
982 struct load_op
*insn
= (struct load_op
*) pc
;
984 if (vstack_push(stack
)) {
988 vstack_ax(stack
)->type
= REG_STAR_GLOB_STRING
;
989 next_pc
+= sizeof(struct load_op
) + strlen(insn
->data
) + 1;
993 case FILTER_OP_LOAD_S64
:
995 if (vstack_push(stack
)) {
999 vstack_ax(stack
)->type
= REG_S64
;
1000 next_pc
+= sizeof(struct load_op
)
1001 + sizeof(struct literal_numeric
);
1005 case FILTER_OP_LOAD_DOUBLE
:
1007 if (vstack_push(stack
)) {
1011 vstack_ax(stack
)->type
= REG_DOUBLE
;
1012 next_pc
+= sizeof(struct load_op
)
1013 + sizeof(struct literal_double
);
1018 case FILTER_OP_CAST_TO_S64
:
1020 struct cast_op
*insn
= (struct cast_op
*) pc
;
1022 switch (vstack_ax(stack
)->type
) {
1024 printk(KERN_WARNING
"unknown register type\n");
1029 case REG_STAR_GLOB_STRING
:
1030 printk(KERN_WARNING
"Cast op can only be applied to numeric or floating point registers\n");
1034 insn
->op
= FILTER_OP_CAST_NOP
;
1037 insn
->op
= FILTER_OP_CAST_DOUBLE_TO_S64
;
1041 vstack_ax(stack
)->type
= REG_S64
;
1042 next_pc
+= sizeof(struct cast_op
);
1045 case FILTER_OP_CAST_DOUBLE_TO_S64
:
1048 vstack_ax(stack
)->type
= REG_S64
;
1049 next_pc
+= sizeof(struct cast_op
);
1052 case FILTER_OP_CAST_NOP
:
1054 next_pc
+= sizeof(struct cast_op
);
1059 * Instructions for recursive traversal through composed types.
1061 case FILTER_OP_GET_CONTEXT_ROOT
:
1063 if (vstack_push(stack
)) {
1067 vstack_ax(stack
)->type
= REG_PTR
;
1068 vstack_ax(stack
)->load
.type
= LOAD_ROOT_CONTEXT
;
1069 next_pc
+= sizeof(struct load_op
);
1072 case FILTER_OP_GET_APP_CONTEXT_ROOT
:
1074 if (vstack_push(stack
)) {
1078 vstack_ax(stack
)->type
= REG_PTR
;
1079 vstack_ax(stack
)->load
.type
= LOAD_ROOT_APP_CONTEXT
;
1080 next_pc
+= sizeof(struct load_op
);
1083 case FILTER_OP_GET_PAYLOAD_ROOT
:
1085 if (vstack_push(stack
)) {
1089 vstack_ax(stack
)->type
= REG_PTR
;
1090 vstack_ax(stack
)->load
.type
= LOAD_ROOT_PAYLOAD
;
1091 next_pc
+= sizeof(struct load_op
);
1095 case FILTER_OP_LOAD_FIELD
:
1097 struct load_op
*insn
= (struct load_op
*) pc
;
1099 WARN_ON_ONCE(vstack_ax(stack
)->type
!= REG_PTR
);
1101 ret
= specialize_load_field(vstack_ax(stack
), insn
);
1105 next_pc
+= sizeof(struct load_op
);
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
:
1119 vstack_ax(stack
)->type
= REG_S64
;
1120 next_pc
+= sizeof(struct load_op
);
1124 case FILTER_OP_LOAD_FIELD_STRING
:
1125 case FILTER_OP_LOAD_FIELD_SEQUENCE
:
1128 vstack_ax(stack
)->type
= REG_STRING
;
1129 next_pc
+= sizeof(struct load_op
);
1133 case FILTER_OP_LOAD_FIELD_DOUBLE
:
1136 vstack_ax(stack
)->type
= REG_DOUBLE
;
1137 next_pc
+= sizeof(struct load_op
);
1141 case FILTER_OP_GET_SYMBOL
:
1143 struct load_op
*insn
= (struct load_op
*) pc
;
1145 dbg_printk("op get symbol\n");
1146 switch (vstack_ax(stack
)->load
.type
) {
1148 printk(KERN_WARNING
"Nested fields not implemented yet.\n");
1151 case LOAD_ROOT_CONTEXT
:
1152 /* Lookup context field. */
1153 ret
= specialize_context_lookup(bytecode
, insn
,
1154 &vstack_ax(stack
)->load
);
1158 case LOAD_ROOT_APP_CONTEXT
:
1161 case LOAD_ROOT_PAYLOAD
:
1162 /* Lookup event payload field. */
1163 ret
= specialize_event_payload_lookup(event
,
1165 &vstack_ax(stack
)->load
);
1170 next_pc
+= sizeof(struct load_op
) + sizeof(struct get_symbol
);
1174 case FILTER_OP_GET_SYMBOL_FIELD
:
1176 /* Always generated by specialize phase. */
1181 case FILTER_OP_GET_INDEX_U16
:
1183 struct load_op
*insn
= (struct load_op
*) pc
;
1184 struct get_index_u16
*index
= (struct get_index_u16
*) insn
->data
;
1186 dbg_printk("op get index u16\n");
1188 ret
= specialize_get_index(bytecode
, insn
, index
->index
,
1189 vstack_ax(stack
), sizeof(*index
));
1192 next_pc
+= sizeof(struct load_op
) + sizeof(struct get_index_u16
);
1196 case FILTER_OP_GET_INDEX_U64
:
1198 struct load_op
*insn
= (struct load_op
*) pc
;
1199 struct get_index_u64
*index
= (struct get_index_u64
*) insn
->data
;
1201 dbg_printk("op get index u64\n");
1203 ret
= specialize_get_index(bytecode
, insn
, index
->index
,
1204 vstack_ax(stack
), sizeof(*index
));
1207 next_pc
+= sizeof(struct load_op
) + sizeof(struct get_index_u64
);