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 "lib/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_event_field
*field
;
202 uint32_t elem_len
, num_elems
;
205 field
= stack_top
->load
.field
;
206 elem_len
= field
->type
.u
.array
.elem_type
.u
.basic
.integer
.size
;
207 signedness
= field
->type
.u
.array
.elem_type
.u
.basic
.integer
.signedness
;
208 num_elems
= field
->type
.u
.array
.length
;
209 if (index
>= num_elems
) {
213 ret
= specialize_get_index_object_type(&stack_top
->load
.object_type
,
214 signedness
, elem_len
);
217 gid
.offset
= index
* (elem_len
/ CHAR_BIT
);
218 gid
.array_len
= num_elems
* (elem_len
/ CHAR_BIT
);
219 gid
.elem
.type
= stack_top
->load
.object_type
;
220 gid
.elem
.len
= elem_len
;
221 if (field
->type
.u
.array
.elem_type
.u
.basic
.integer
.reverse_byte_order
)
222 gid
.elem
.rev_bo
= true;
223 stack_top
->load
.rev_bo
= gid
.elem
.rev_bo
;
226 case OBJECT_TYPE_SEQUENCE
:
228 const struct lttng_event_field
*field
;
232 field
= stack_top
->load
.field
;
233 elem_len
= field
->type
.u
.sequence
.elem_type
.u
.basic
.integer
.size
;
234 signedness
= field
->type
.u
.sequence
.elem_type
.u
.basic
.integer
.signedness
;
235 ret
= specialize_get_index_object_type(&stack_top
->load
.object_type
,
236 signedness
, elem_len
);
239 gid
.offset
= index
* (elem_len
/ CHAR_BIT
);
240 gid
.elem
.type
= stack_top
->load
.object_type
;
241 gid
.elem
.len
= elem_len
;
242 if (field
->type
.u
.sequence
.elem_type
.u
.basic
.integer
.reverse_byte_order
)
243 gid
.elem
.rev_bo
= true;
244 stack_top
->load
.rev_bo
= gid
.elem
.rev_bo
;
247 case OBJECT_TYPE_STRUCT
:
248 /* Only generated by the specialize phase. */
249 case OBJECT_TYPE_VARIANT
: /* Fall-through */
251 printk(KERN_WARNING
"Unexpected get index type %d",
252 (int) stack_top
->load
.object_type
);
257 case LOAD_ROOT_CONTEXT
:
258 case LOAD_ROOT_APP_CONTEXT
:
259 case LOAD_ROOT_PAYLOAD
:
260 printk(KERN_WARNING
"Index lookup for root field not implemented yet.\n");
264 data_offset
= bytecode_push_data(runtime
, &gid
,
265 __alignof__(gid
), sizeof(gid
));
266 if (data_offset
< 0) {
272 ((struct get_index_u16
*) insn
->data
)->index
= data_offset
;
275 ((struct get_index_u64
*) insn
->data
)->index
= data_offset
;
288 static int specialize_context_lookup_name(struct bytecode_runtime
*bytecode
,
289 struct load_op
*insn
)
294 offset
= ((struct get_symbol
*) insn
->data
)->offset
;
295 name
= bytecode
->p
.bc
->bc
.data
+ bytecode
->p
.bc
->bc
.reloc_offset
+ offset
;
296 return lttng_get_context_index(lttng_static_ctx
, name
);
299 static int specialize_load_object(const struct lttng_event_field
*field
,
300 struct vstack_load
*load
, bool is_context
)
302 load
->type
= LOAD_OBJECT
;
304 * LTTng-UST layout all integer fields as s64 on the stack for the filter.
306 switch (field
->type
.atype
) {
308 if (field
->type
.u
.basic
.integer
.signedness
)
309 load
->object_type
= OBJECT_TYPE_S64
;
311 load
->object_type
= OBJECT_TYPE_U64
;
312 load
->rev_bo
= false;
316 const struct lttng_integer_type
*itype
=
317 &field
->type
.u
.basic
.enumeration
.container_type
;
319 if (itype
->signedness
)
320 load
->object_type
= OBJECT_TYPE_S64
;
322 load
->object_type
= OBJECT_TYPE_U64
;
323 load
->rev_bo
= false;
327 if (field
->type
.u
.array
.elem_type
.atype
!= atype_integer
) {
328 printk(KERN_WARNING
"Array nesting only supports integer types.\n");
332 load
->object_type
= OBJECT_TYPE_STRING
;
334 if (field
->type
.u
.array
.elem_type
.u
.basic
.integer
.encoding
== lttng_encode_none
) {
335 load
->object_type
= OBJECT_TYPE_ARRAY
;
338 load
->object_type
= OBJECT_TYPE_STRING_SEQUENCE
;
343 if (field
->type
.u
.sequence
.elem_type
.atype
!= atype_integer
) {
344 printk(KERN_WARNING
"Sequence nesting only supports integer types.\n");
348 load
->object_type
= OBJECT_TYPE_STRING
;
350 if (field
->type
.u
.sequence
.elem_type
.u
.basic
.integer
.encoding
== lttng_encode_none
) {
351 load
->object_type
= OBJECT_TYPE_SEQUENCE
;
354 load
->object_type
= OBJECT_TYPE_STRING_SEQUENCE
;
358 case atype_array_bitfield
:
359 printk(KERN_WARNING
"Bitfield array type is not supported.\n");
361 case atype_sequence_bitfield
:
362 printk(KERN_WARNING
"Bitfield sequence type is not supported.\n");
365 load
->object_type
= OBJECT_TYPE_STRING
;
368 printk(KERN_WARNING
"Structure type cannot be loaded.\n");
371 printk(KERN_WARNING
"Unknown type: %d", (int) field
->type
.atype
);
377 static int specialize_context_lookup(struct bytecode_runtime
*runtime
,
378 struct load_op
*insn
,
379 struct vstack_load
*load
)
382 struct lttng_ctx_field
*ctx_field
;
383 struct lttng_event_field
*field
;
384 struct filter_get_index_data gid
;
387 idx
= specialize_context_lookup_name(runtime
, insn
);
391 ctx_field
= <tng_static_ctx
->fields
[idx
];
392 field
= &ctx_field
->event_field
;
393 ret
= specialize_load_object(field
, load
, true);
396 /* Specialize each get_symbol into a get_index. */
397 insn
->op
= FILTER_OP_GET_INDEX_U16
;
398 memset(&gid
, 0, sizeof(gid
));
400 gid
.elem
.type
= load
->object_type
;
401 data_offset
= bytecode_push_data(runtime
, &gid
,
402 __alignof__(gid
), sizeof(gid
));
403 if (data_offset
< 0) {
406 ((struct get_index_u16
*) insn
->data
)->index
= data_offset
;
410 static int specialize_event_payload_lookup(struct lttng_event
*event
,
411 struct bytecode_runtime
*runtime
,
412 struct load_op
*insn
,
413 struct vstack_load
*load
)
417 const struct lttng_event_desc
*desc
= event
->desc
;
418 unsigned int i
, nr_fields
;
420 uint32_t field_offset
= 0;
421 const struct lttng_event_field
*field
;
423 struct filter_get_index_data gid
;
426 nr_fields
= desc
->nr_fields
;
427 offset
= ((struct get_symbol
*) insn
->data
)->offset
;
428 name
= runtime
->p
.bc
->bc
.data
+ runtime
->p
.bc
->bc
.reloc_offset
+ offset
;
429 for (i
= 0; i
< nr_fields
; i
++) {
430 field
= &desc
->fields
[i
];
431 if (!strcmp(field
->name
, name
)) {
435 /* compute field offset on stack */
436 switch (field
->type
.atype
) {
439 field_offset
+= sizeof(int64_t);
443 case atype_array_bitfield
:
444 case atype_sequence_bitfield
:
445 field_offset
+= sizeof(unsigned long);
446 field_offset
+= sizeof(void *);
449 field_offset
+= sizeof(void *);
461 ret
= specialize_load_object(field
, load
, false);
465 /* Specialize each get_symbol into a get_index. */
466 insn
->op
= FILTER_OP_GET_INDEX_U16
;
467 memset(&gid
, 0, sizeof(gid
));
468 gid
.offset
= field_offset
;
469 gid
.elem
.type
= load
->object_type
;
470 data_offset
= bytecode_push_data(runtime
, &gid
,
471 __alignof__(gid
), sizeof(gid
));
472 if (data_offset
< 0) {
476 ((struct get_index_u16
*) insn
->data
)->index
= data_offset
;
482 int lttng_filter_specialize_bytecode(struct lttng_event
*event
,
483 struct bytecode_runtime
*bytecode
)
485 void *pc
, *next_pc
, *start_pc
;
487 struct vstack _stack
;
488 struct vstack
*stack
= &_stack
;
492 start_pc
= &bytecode
->code
[0];
493 for (pc
= next_pc
= start_pc
; pc
- start_pc
< bytecode
->len
;
495 switch (*(filter_opcode_t
*) pc
) {
496 case FILTER_OP_UNKNOWN
:
498 printk(KERN_WARNING
"unknown bytecode op %u\n",
499 (unsigned int) *(filter_opcode_t
*) pc
);
503 case FILTER_OP_RETURN
:
504 case FILTER_OP_RETURN_S64
:
513 case FILTER_OP_MINUS
:
514 printk(KERN_WARNING
"unsupported bytecode op %u\n",
515 (unsigned int) *(filter_opcode_t
*) pc
);
521 struct binary_op
*insn
= (struct binary_op
*) pc
;
523 switch(vstack_ax(stack
)->type
) {
525 printk(KERN_WARNING
"unknown register type\n");
530 if (vstack_bx(stack
)->type
== REG_STAR_GLOB_STRING
)
531 insn
->op
= FILTER_OP_EQ_STAR_GLOB_STRING
;
533 insn
->op
= FILTER_OP_EQ_STRING
;
535 case REG_STAR_GLOB_STRING
:
536 insn
->op
= FILTER_OP_EQ_STAR_GLOB_STRING
;
539 if (vstack_bx(stack
)->type
== REG_S64
)
540 insn
->op
= FILTER_OP_EQ_S64
;
542 insn
->op
= FILTER_OP_EQ_DOUBLE_S64
;
545 if (vstack_bx(stack
)->type
== REG_S64
)
546 insn
->op
= FILTER_OP_EQ_S64_DOUBLE
;
548 insn
->op
= FILTER_OP_EQ_DOUBLE
;
552 if (vstack_pop(stack
)) {
556 vstack_ax(stack
)->type
= REG_S64
;
557 next_pc
+= sizeof(struct binary_op
);
563 struct binary_op
*insn
= (struct binary_op
*) pc
;
565 switch(vstack_ax(stack
)->type
) {
567 printk(KERN_WARNING
"unknown register type\n");
572 if (vstack_bx(stack
)->type
== REG_STAR_GLOB_STRING
)
573 insn
->op
= FILTER_OP_NE_STAR_GLOB_STRING
;
575 insn
->op
= FILTER_OP_NE_STRING
;
577 case REG_STAR_GLOB_STRING
:
578 insn
->op
= FILTER_OP_NE_STAR_GLOB_STRING
;
581 if (vstack_bx(stack
)->type
== REG_S64
)
582 insn
->op
= FILTER_OP_NE_S64
;
584 insn
->op
= FILTER_OP_NE_DOUBLE_S64
;
587 if (vstack_bx(stack
)->type
== REG_S64
)
588 insn
->op
= FILTER_OP_NE_S64_DOUBLE
;
590 insn
->op
= FILTER_OP_NE_DOUBLE
;
594 if (vstack_pop(stack
)) {
598 vstack_ax(stack
)->type
= REG_S64
;
599 next_pc
+= sizeof(struct binary_op
);
605 struct binary_op
*insn
= (struct binary_op
*) pc
;
607 switch(vstack_ax(stack
)->type
) {
609 printk(KERN_WARNING
"unknown register type\n");
613 case REG_STAR_GLOB_STRING
:
614 printk(KERN_WARNING
"invalid register type for > binary operator\n");
618 insn
->op
= FILTER_OP_GT_STRING
;
621 if (vstack_bx(stack
)->type
== REG_S64
)
622 insn
->op
= FILTER_OP_GT_S64
;
624 insn
->op
= FILTER_OP_GT_DOUBLE_S64
;
627 if (vstack_bx(stack
)->type
== REG_S64
)
628 insn
->op
= FILTER_OP_GT_S64_DOUBLE
;
630 insn
->op
= FILTER_OP_GT_DOUBLE
;
634 if (vstack_pop(stack
)) {
638 vstack_ax(stack
)->type
= REG_S64
;
639 next_pc
+= sizeof(struct binary_op
);
645 struct binary_op
*insn
= (struct binary_op
*) pc
;
647 switch(vstack_ax(stack
)->type
) {
649 printk(KERN_WARNING
"unknown register type\n");
653 case REG_STAR_GLOB_STRING
:
654 printk(KERN_WARNING
"invalid register type for < binary operator\n");
658 insn
->op
= FILTER_OP_LT_STRING
;
661 if (vstack_bx(stack
)->type
== REG_S64
)
662 insn
->op
= FILTER_OP_LT_S64
;
664 insn
->op
= FILTER_OP_LT_DOUBLE_S64
;
667 if (vstack_bx(stack
)->type
== REG_S64
)
668 insn
->op
= FILTER_OP_LT_S64_DOUBLE
;
670 insn
->op
= FILTER_OP_LT_DOUBLE
;
674 if (vstack_pop(stack
)) {
678 vstack_ax(stack
)->type
= REG_S64
;
679 next_pc
+= sizeof(struct binary_op
);
685 struct binary_op
*insn
= (struct binary_op
*) pc
;
687 switch(vstack_ax(stack
)->type
) {
689 printk(KERN_WARNING
"unknown register type\n");
693 case REG_STAR_GLOB_STRING
:
694 printk(KERN_WARNING
"invalid register type for >= binary operator\n");
698 insn
->op
= FILTER_OP_GE_STRING
;
701 if (vstack_bx(stack
)->type
== REG_S64
)
702 insn
->op
= FILTER_OP_GE_S64
;
704 insn
->op
= FILTER_OP_GE_DOUBLE_S64
;
707 if (vstack_bx(stack
)->type
== REG_S64
)
708 insn
->op
= FILTER_OP_GE_S64_DOUBLE
;
710 insn
->op
= FILTER_OP_GE_DOUBLE
;
714 if (vstack_pop(stack
)) {
718 vstack_ax(stack
)->type
= REG_S64
;
719 next_pc
+= sizeof(struct binary_op
);
724 struct binary_op
*insn
= (struct binary_op
*) pc
;
726 switch(vstack_ax(stack
)->type
) {
728 printk(KERN_WARNING
"unknown register type\n");
732 case REG_STAR_GLOB_STRING
:
733 printk(KERN_WARNING
"invalid register type for <= binary operator\n");
737 insn
->op
= FILTER_OP_LE_STRING
;
740 if (vstack_bx(stack
)->type
== REG_S64
)
741 insn
->op
= FILTER_OP_LE_S64
;
743 insn
->op
= FILTER_OP_LE_DOUBLE_S64
;
746 if (vstack_bx(stack
)->type
== REG_S64
)
747 insn
->op
= FILTER_OP_LE_S64_DOUBLE
;
749 insn
->op
= FILTER_OP_LE_DOUBLE
;
752 vstack_ax(stack
)->type
= REG_S64
;
753 next_pc
+= sizeof(struct binary_op
);
757 case FILTER_OP_EQ_STRING
:
758 case FILTER_OP_NE_STRING
:
759 case FILTER_OP_GT_STRING
:
760 case FILTER_OP_LT_STRING
:
761 case FILTER_OP_GE_STRING
:
762 case FILTER_OP_LE_STRING
:
763 case FILTER_OP_EQ_STAR_GLOB_STRING
:
764 case FILTER_OP_NE_STAR_GLOB_STRING
:
765 case FILTER_OP_EQ_S64
:
766 case FILTER_OP_NE_S64
:
767 case FILTER_OP_GT_S64
:
768 case FILTER_OP_LT_S64
:
769 case FILTER_OP_GE_S64
:
770 case FILTER_OP_LE_S64
:
771 case FILTER_OP_EQ_DOUBLE
:
772 case FILTER_OP_NE_DOUBLE
:
773 case FILTER_OP_GT_DOUBLE
:
774 case FILTER_OP_LT_DOUBLE
:
775 case FILTER_OP_GE_DOUBLE
:
776 case FILTER_OP_LE_DOUBLE
:
777 case FILTER_OP_EQ_DOUBLE_S64
:
778 case FILTER_OP_NE_DOUBLE_S64
:
779 case FILTER_OP_GT_DOUBLE_S64
:
780 case FILTER_OP_LT_DOUBLE_S64
:
781 case FILTER_OP_GE_DOUBLE_S64
:
782 case FILTER_OP_LE_DOUBLE_S64
:
783 case FILTER_OP_EQ_S64_DOUBLE
:
784 case FILTER_OP_NE_S64_DOUBLE
:
785 case FILTER_OP_GT_S64_DOUBLE
:
786 case FILTER_OP_LT_S64_DOUBLE
:
787 case FILTER_OP_GE_S64_DOUBLE
:
788 case FILTER_OP_LE_S64_DOUBLE
:
789 case FILTER_OP_BIT_RSHIFT
:
790 case FILTER_OP_BIT_LSHIFT
:
791 case FILTER_OP_BIT_AND
:
792 case FILTER_OP_BIT_OR
:
793 case FILTER_OP_BIT_XOR
:
796 if (vstack_pop(stack
)) {
800 vstack_ax(stack
)->type
= REG_S64
;
801 next_pc
+= sizeof(struct binary_op
);
806 case FILTER_OP_UNARY_PLUS
:
808 struct unary_op
*insn
= (struct unary_op
*) pc
;
810 switch(vstack_ax(stack
)->type
) {
812 printk(KERN_WARNING
"unknown register type\n");
817 insn
->op
= FILTER_OP_UNARY_PLUS_S64
;
820 insn
->op
= FILTER_OP_UNARY_PLUS_DOUBLE
;
824 next_pc
+= sizeof(struct unary_op
);
828 case FILTER_OP_UNARY_MINUS
:
830 struct unary_op
*insn
= (struct unary_op
*) pc
;
832 switch(vstack_ax(stack
)->type
) {
834 printk(KERN_WARNING
"unknown register type\n");
839 insn
->op
= FILTER_OP_UNARY_MINUS_S64
;
842 insn
->op
= FILTER_OP_UNARY_MINUS_DOUBLE
;
846 next_pc
+= sizeof(struct unary_op
);
850 case FILTER_OP_UNARY_NOT
:
852 struct unary_op
*insn
= (struct unary_op
*) pc
;
854 switch(vstack_ax(stack
)->type
) {
856 printk(KERN_WARNING
"unknown register type\n");
861 insn
->op
= FILTER_OP_UNARY_NOT_S64
;
864 insn
->op
= FILTER_OP_UNARY_NOT_DOUBLE
;
868 next_pc
+= sizeof(struct unary_op
);
872 case FILTER_OP_UNARY_BIT_NOT
:
875 next_pc
+= sizeof(struct unary_op
);
879 case FILTER_OP_UNARY_PLUS_S64
:
880 case FILTER_OP_UNARY_MINUS_S64
:
881 case FILTER_OP_UNARY_NOT_S64
:
882 case FILTER_OP_UNARY_PLUS_DOUBLE
:
883 case FILTER_OP_UNARY_MINUS_DOUBLE
:
884 case FILTER_OP_UNARY_NOT_DOUBLE
:
887 next_pc
+= sizeof(struct unary_op
);
895 /* Continue to next instruction */
896 /* Pop 1 when jump not taken */
897 if (vstack_pop(stack
)) {
901 next_pc
+= sizeof(struct logical_op
);
906 case FILTER_OP_LOAD_FIELD_REF
:
908 printk(KERN_WARNING
"Unknown field ref type\n");
912 /* get context ref */
913 case FILTER_OP_GET_CONTEXT_REF
:
915 printk(KERN_WARNING
"Unknown get context ref type\n");
919 case FILTER_OP_LOAD_FIELD_REF_STRING
:
920 case FILTER_OP_LOAD_FIELD_REF_SEQUENCE
:
921 case FILTER_OP_GET_CONTEXT_REF_STRING
:
922 case FILTER_OP_LOAD_FIELD_REF_USER_STRING
:
923 case FILTER_OP_LOAD_FIELD_REF_USER_SEQUENCE
:
925 if (vstack_push(stack
)) {
929 vstack_ax(stack
)->type
= REG_STRING
;
930 next_pc
+= sizeof(struct load_op
) + sizeof(struct field_ref
);
933 case FILTER_OP_LOAD_FIELD_REF_S64
:
934 case FILTER_OP_GET_CONTEXT_REF_S64
:
936 if (vstack_push(stack
)) {
940 vstack_ax(stack
)->type
= REG_S64
;
941 next_pc
+= sizeof(struct load_op
) + sizeof(struct field_ref
);
944 case FILTER_OP_LOAD_FIELD_REF_DOUBLE
:
945 case FILTER_OP_GET_CONTEXT_REF_DOUBLE
:
947 if (vstack_push(stack
)) {
951 vstack_ax(stack
)->type
= REG_DOUBLE
;
952 next_pc
+= sizeof(struct load_op
) + sizeof(struct field_ref
);
956 /* load from immediate operand */
957 case FILTER_OP_LOAD_STRING
:
959 struct load_op
*insn
= (struct load_op
*) pc
;
961 if (vstack_push(stack
)) {
965 vstack_ax(stack
)->type
= REG_STRING
;
966 next_pc
+= sizeof(struct load_op
) + strlen(insn
->data
) + 1;
970 case FILTER_OP_LOAD_STAR_GLOB_STRING
:
972 struct load_op
*insn
= (struct load_op
*) pc
;
974 if (vstack_push(stack
)) {
978 vstack_ax(stack
)->type
= REG_STAR_GLOB_STRING
;
979 next_pc
+= sizeof(struct load_op
) + strlen(insn
->data
) + 1;
983 case FILTER_OP_LOAD_S64
:
985 if (vstack_push(stack
)) {
989 vstack_ax(stack
)->type
= REG_S64
;
990 next_pc
+= sizeof(struct load_op
)
991 + sizeof(struct literal_numeric
);
995 case FILTER_OP_LOAD_DOUBLE
:
997 if (vstack_push(stack
)) {
1001 vstack_ax(stack
)->type
= REG_DOUBLE
;
1002 next_pc
+= sizeof(struct load_op
)
1003 + sizeof(struct literal_double
);
1008 case FILTER_OP_CAST_TO_S64
:
1010 struct cast_op
*insn
= (struct cast_op
*) pc
;
1012 switch (vstack_ax(stack
)->type
) {
1014 printk(KERN_WARNING
"unknown register type\n");
1019 case REG_STAR_GLOB_STRING
:
1020 printk(KERN_WARNING
"Cast op can only be applied to numeric or floating point registers\n");
1024 insn
->op
= FILTER_OP_CAST_NOP
;
1027 insn
->op
= FILTER_OP_CAST_DOUBLE_TO_S64
;
1031 vstack_ax(stack
)->type
= REG_S64
;
1032 next_pc
+= sizeof(struct cast_op
);
1035 case FILTER_OP_CAST_DOUBLE_TO_S64
:
1038 vstack_ax(stack
)->type
= REG_S64
;
1039 next_pc
+= sizeof(struct cast_op
);
1042 case FILTER_OP_CAST_NOP
:
1044 next_pc
+= sizeof(struct cast_op
);
1049 * Instructions for recursive traversal through composed types.
1051 case FILTER_OP_GET_CONTEXT_ROOT
:
1053 if (vstack_push(stack
)) {
1057 vstack_ax(stack
)->type
= REG_PTR
;
1058 vstack_ax(stack
)->load
.type
= LOAD_ROOT_CONTEXT
;
1059 next_pc
+= sizeof(struct load_op
);
1062 case FILTER_OP_GET_APP_CONTEXT_ROOT
:
1064 if (vstack_push(stack
)) {
1068 vstack_ax(stack
)->type
= REG_PTR
;
1069 vstack_ax(stack
)->load
.type
= LOAD_ROOT_APP_CONTEXT
;
1070 next_pc
+= sizeof(struct load_op
);
1073 case FILTER_OP_GET_PAYLOAD_ROOT
:
1075 if (vstack_push(stack
)) {
1079 vstack_ax(stack
)->type
= REG_PTR
;
1080 vstack_ax(stack
)->load
.type
= LOAD_ROOT_PAYLOAD
;
1081 next_pc
+= sizeof(struct load_op
);
1085 case FILTER_OP_LOAD_FIELD
:
1087 struct load_op
*insn
= (struct load_op
*) pc
;
1089 WARN_ON_ONCE(vstack_ax(stack
)->type
!= REG_PTR
);
1091 ret
= specialize_load_field(vstack_ax(stack
), insn
);
1095 next_pc
+= sizeof(struct load_op
);
1099 case FILTER_OP_LOAD_FIELD_S8
:
1100 case FILTER_OP_LOAD_FIELD_S16
:
1101 case FILTER_OP_LOAD_FIELD_S32
:
1102 case FILTER_OP_LOAD_FIELD_S64
:
1103 case FILTER_OP_LOAD_FIELD_U8
:
1104 case FILTER_OP_LOAD_FIELD_U16
:
1105 case FILTER_OP_LOAD_FIELD_U32
:
1106 case FILTER_OP_LOAD_FIELD_U64
:
1109 vstack_ax(stack
)->type
= REG_S64
;
1110 next_pc
+= sizeof(struct load_op
);
1114 case FILTER_OP_LOAD_FIELD_STRING
:
1115 case FILTER_OP_LOAD_FIELD_SEQUENCE
:
1118 vstack_ax(stack
)->type
= REG_STRING
;
1119 next_pc
+= sizeof(struct load_op
);
1123 case FILTER_OP_LOAD_FIELD_DOUBLE
:
1126 vstack_ax(stack
)->type
= REG_DOUBLE
;
1127 next_pc
+= sizeof(struct load_op
);
1131 case FILTER_OP_GET_SYMBOL
:
1133 struct load_op
*insn
= (struct load_op
*) pc
;
1135 dbg_printk("op get symbol\n");
1136 switch (vstack_ax(stack
)->load
.type
) {
1138 printk(KERN_WARNING
"Nested fields not implemented yet.\n");
1141 case LOAD_ROOT_CONTEXT
:
1142 /* Lookup context field. */
1143 ret
= specialize_context_lookup(bytecode
, insn
,
1144 &vstack_ax(stack
)->load
);
1148 case LOAD_ROOT_APP_CONTEXT
:
1151 case LOAD_ROOT_PAYLOAD
:
1152 /* Lookup event payload field. */
1153 ret
= specialize_event_payload_lookup(event
,
1155 &vstack_ax(stack
)->load
);
1160 next_pc
+= sizeof(struct load_op
) + sizeof(struct get_symbol
);
1164 case FILTER_OP_GET_SYMBOL_FIELD
:
1166 /* Always generated by specialize phase. */
1171 case FILTER_OP_GET_INDEX_U16
:
1173 struct load_op
*insn
= (struct load_op
*) pc
;
1174 struct get_index_u16
*index
= (struct get_index_u16
*) insn
->data
;
1176 dbg_printk("op get index u16\n");
1178 ret
= specialize_get_index(bytecode
, insn
, index
->index
,
1179 vstack_ax(stack
), sizeof(*index
));
1182 next_pc
+= sizeof(struct load_op
) + sizeof(struct get_index_u16
);
1186 case FILTER_OP_GET_INDEX_U64
:
1188 struct load_op
*insn
= (struct load_op
*) pc
;
1189 struct get_index_u64
*index
= (struct get_index_u64
*) insn
->data
;
1191 dbg_printk("op get index u64\n");
1193 ret
= specialize_get_index(bytecode
, insn
, index
->index
,
1194 vstack_ax(stack
), sizeof(*index
));
1197 next_pc
+= sizeof(struct load_op
) + sizeof(struct get_index_u64
);