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1 | #ifndef _FILTER_BYTECODE_H |
2 | #define _FILTER_BYTECODE_H | |
3 | ||
4 | /* | |
5 | * filter-bytecode.h | |
6 | * | |
7 | * LTTng filter bytecode | |
8 | * | |
9 | * Copyright 2012 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | |
10 | * | |
11 | * This library is free software; you can redistribute it and/or modify it | |
12 | * under the terms of the GNU Lesser General Public License, version 2.1 only, | |
13 | * as published by the Free Software Foundation. | |
14 | * | |
15 | * This library is distributed in the hope that it will be useful, | |
16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
18 | * Lesser General Public License for more details. | |
19 | * | |
20 | * You should have received a copy of the GNU Lesser General Public License | |
21 | * along with this library; if not, write to the Free Software Foundation, | |
22 | * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
23 | */ | |
24 | ||
25 | #include "filter-ast.h" | |
53a80697 | 26 | #include "../../common/sessiond-comm/sessiond-comm.h" |
953192ba MD |
27 | |
28 | /* | |
29 | * offsets are absolute from start of bytecode. | |
30 | */ | |
31 | ||
32 | enum filter_register { | |
33 | REG_R0 = 0, | |
34 | REG_R1 = 1, | |
35 | REG_ERROR, | |
36 | }; | |
37 | ||
38 | enum field_ref_type { | |
39 | FIELD_REF_UNKNOWN = 0, | |
40 | FIELD_REF_STRING, | |
41 | FIELD_REF_SEQUENCE, | |
42 | FIELD_REF_S64, | |
43 | }; | |
44 | ||
45 | struct field_ref { | |
46 | /* Initially, symbol offset. After link, field offset. */ | |
47 | uint16_t offset; | |
48 | uint8_t type; /* enum field_ref_type */ | |
49 | } __attribute__((packed)); | |
50 | ||
51 | struct literal_numeric { | |
52 | int64_t v; | |
53 | } __attribute__((packed)); | |
54 | ||
55 | struct literal_string { | |
56 | char string[0]; | |
57 | } __attribute__((packed)); | |
58 | ||
59 | enum filter_op { | |
60 | FILTER_OP_UNKNOWN = 0, | |
61 | ||
62 | FILTER_OP_RETURN, | |
63 | ||
64 | /* binary */ | |
65 | FILTER_OP_MUL, | |
66 | FILTER_OP_DIV, | |
67 | FILTER_OP_MOD, | |
68 | FILTER_OP_PLUS, | |
69 | FILTER_OP_MINUS, | |
70 | FILTER_OP_RSHIFT, | |
71 | FILTER_OP_LSHIFT, | |
72 | FILTER_OP_BIN_AND, | |
73 | FILTER_OP_BIN_OR, | |
74 | FILTER_OP_BIN_XOR, | |
75 | FILTER_OP_EQ, | |
76 | FILTER_OP_NE, | |
77 | FILTER_OP_GT, | |
78 | FILTER_OP_LT, | |
79 | FILTER_OP_GE, | |
80 | FILTER_OP_LE, | |
81 | ||
82 | /* unary */ | |
83 | FILTER_OP_UNARY_PLUS, | |
84 | FILTER_OP_UNARY_MINUS, | |
85 | FILTER_OP_UNARY_NOT, | |
86 | ||
87 | /* logical */ | |
88 | FILTER_OP_AND, | |
89 | FILTER_OP_OR, | |
90 | ||
91 | /* load */ | |
92 | FILTER_OP_LOAD_FIELD_REF, | |
93 | FILTER_OP_LOAD_STRING, | |
94 | FILTER_OP_LOAD_S64, | |
95 | ||
96 | NR_FILTER_OPS, | |
97 | }; | |
98 | ||
99 | typedef uint8_t filter_opcode_t; | |
100 | ||
101 | struct load_op { | |
102 | filter_opcode_t op; | |
103 | uint8_t reg; /* enum filter_register */ | |
104 | char data[0]; | |
105 | /* data to load. Size known by enum filter_opcode and null-term char. */ | |
106 | } __attribute__((packed)); | |
107 | ||
108 | struct binary_op { | |
109 | filter_opcode_t op; | |
110 | } __attribute__((packed)); | |
111 | ||
112 | struct unary_op { | |
113 | filter_opcode_t op; | |
114 | uint8_t reg; /* enum filter_register */ | |
115 | } __attribute__((packed)); | |
116 | ||
117 | /* skip_offset is absolute from start of bytecode */ | |
118 | struct logical_op { | |
119 | filter_opcode_t op; | |
120 | uint16_t skip_offset; /* bytecode insn, if skip second test */ | |
121 | } __attribute__((packed)); | |
122 | ||
123 | struct return_op { | |
124 | filter_opcode_t op; | |
125 | } __attribute__((packed)); | |
126 | ||
53a80697 | 127 | struct lttng_filter_bytecode_alloc { |
953192ba | 128 | uint16_t alloc_len; |
53a80697 | 129 | struct lttng_filter_bytecode b; |
953192ba MD |
130 | }; |
131 | ||
132 | static inline | |
53a80697 | 133 | unsigned int bytecode_get_len(struct lttng_filter_bytecode *bytecode) |
953192ba MD |
134 | { |
135 | return bytecode->len; | |
136 | } | |
137 | ||
138 | #endif /* _FILTER_BYTECODE_H */ |