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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 | * | |
bbf3aef5 | 9 | * Copyright 2012-2016 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
07dfc1d0 | 10 | * |
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11 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
12 | * of this software and associated documentation files (the "Software"), to deal | |
13 | * in the Software without restriction, including without limitation the rights | |
14 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
15 | * copies of the Software, and to permit persons to whom the Software is | |
16 | * furnished to do so, subject to the following conditions: | |
07dfc1d0 | 17 | * |
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18 | * The above copyright notice and this permission notice shall be included in |
19 | * all copies or substantial portions of the Software. | |
07dfc1d0 | 20 | * |
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21 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
22 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
23 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | |
24 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
25 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
26 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
27 | * SOFTWARE. | |
07dfc1d0 MD |
28 | */ |
29 | ||
30 | /* | |
31 | * offsets are absolute from start of bytecode. | |
32 | */ | |
33 | ||
34 | struct field_ref { | |
35 | /* Initially, symbol offset. After link, field offset. */ | |
36 | uint16_t offset; | |
37 | } __attribute__((packed)); | |
38 | ||
39 | struct literal_numeric { | |
40 | int64_t v; | |
41 | } __attribute__((packed)); | |
42 | ||
43 | struct literal_double { | |
44 | double v; | |
45 | } __attribute__((packed)); | |
46 | ||
47 | struct literal_string { | |
48 | char string[0]; | |
49 | } __attribute__((packed)); | |
50 | ||
51 | enum filter_op { | |
52 | FILTER_OP_UNKNOWN = 0, | |
53 | ||
54 | FILTER_OP_RETURN, | |
55 | ||
56 | /* binary */ | |
57 | FILTER_OP_MUL, | |
58 | FILTER_OP_DIV, | |
59 | FILTER_OP_MOD, | |
60 | FILTER_OP_PLUS, | |
61 | FILTER_OP_MINUS, | |
62 | FILTER_OP_RSHIFT, | |
63 | FILTER_OP_LSHIFT, | |
64 | FILTER_OP_BIN_AND, | |
65 | FILTER_OP_BIN_OR, | |
66 | FILTER_OP_BIN_XOR, | |
67 | ||
68 | /* binary comparators */ | |
69 | FILTER_OP_EQ, | |
70 | FILTER_OP_NE, | |
71 | FILTER_OP_GT, | |
72 | FILTER_OP_LT, | |
73 | FILTER_OP_GE, | |
74 | FILTER_OP_LE, | |
75 | ||
76 | /* string binary comparator */ | |
77 | FILTER_OP_EQ_STRING, | |
78 | FILTER_OP_NE_STRING, | |
79 | FILTER_OP_GT_STRING, | |
80 | FILTER_OP_LT_STRING, | |
81 | FILTER_OP_GE_STRING, | |
82 | FILTER_OP_LE_STRING, | |
83 | ||
84 | /* s64 binary comparator */ | |
85 | FILTER_OP_EQ_S64, | |
86 | FILTER_OP_NE_S64, | |
87 | FILTER_OP_GT_S64, | |
88 | FILTER_OP_LT_S64, | |
89 | FILTER_OP_GE_S64, | |
90 | FILTER_OP_LE_S64, | |
91 | ||
92 | /* double binary comparator */ | |
93 | FILTER_OP_EQ_DOUBLE, | |
94 | FILTER_OP_NE_DOUBLE, | |
95 | FILTER_OP_GT_DOUBLE, | |
96 | FILTER_OP_LT_DOUBLE, | |
97 | FILTER_OP_GE_DOUBLE, | |
98 | FILTER_OP_LE_DOUBLE, | |
99 | ||
100 | /* Mixed S64-double binary comparators */ | |
101 | FILTER_OP_EQ_DOUBLE_S64, | |
102 | FILTER_OP_NE_DOUBLE_S64, | |
103 | FILTER_OP_GT_DOUBLE_S64, | |
104 | FILTER_OP_LT_DOUBLE_S64, | |
105 | FILTER_OP_GE_DOUBLE_S64, | |
106 | FILTER_OP_LE_DOUBLE_S64, | |
107 | ||
108 | FILTER_OP_EQ_S64_DOUBLE, | |
109 | FILTER_OP_NE_S64_DOUBLE, | |
110 | FILTER_OP_GT_S64_DOUBLE, | |
111 | FILTER_OP_LT_S64_DOUBLE, | |
112 | FILTER_OP_GE_S64_DOUBLE, | |
113 | FILTER_OP_LE_S64_DOUBLE, | |
114 | ||
115 | /* unary */ | |
116 | FILTER_OP_UNARY_PLUS, | |
117 | FILTER_OP_UNARY_MINUS, | |
118 | FILTER_OP_UNARY_NOT, | |
119 | FILTER_OP_UNARY_PLUS_S64, | |
120 | FILTER_OP_UNARY_MINUS_S64, | |
121 | FILTER_OP_UNARY_NOT_S64, | |
122 | FILTER_OP_UNARY_PLUS_DOUBLE, | |
123 | FILTER_OP_UNARY_MINUS_DOUBLE, | |
124 | FILTER_OP_UNARY_NOT_DOUBLE, | |
125 | ||
126 | /* logical */ | |
127 | FILTER_OP_AND, | |
128 | FILTER_OP_OR, | |
129 | ||
130 | /* load field ref */ | |
131 | FILTER_OP_LOAD_FIELD_REF, | |
132 | FILTER_OP_LOAD_FIELD_REF_STRING, | |
133 | FILTER_OP_LOAD_FIELD_REF_SEQUENCE, | |
134 | FILTER_OP_LOAD_FIELD_REF_S64, | |
135 | FILTER_OP_LOAD_FIELD_REF_DOUBLE, | |
136 | ||
137 | /* load immediate from operand */ | |
138 | FILTER_OP_LOAD_STRING, | |
139 | FILTER_OP_LOAD_S64, | |
140 | FILTER_OP_LOAD_DOUBLE, | |
141 | ||
142 | /* cast */ | |
143 | FILTER_OP_CAST_TO_S64, | |
144 | FILTER_OP_CAST_DOUBLE_TO_S64, | |
145 | FILTER_OP_CAST_NOP, | |
146 | ||
147 | /* get context ref */ | |
148 | FILTER_OP_GET_CONTEXT_REF, | |
149 | FILTER_OP_GET_CONTEXT_REF_STRING, | |
150 | FILTER_OP_GET_CONTEXT_REF_S64, | |
151 | FILTER_OP_GET_CONTEXT_REF_DOUBLE, | |
152 | ||
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153 | /* load userspace field ref */ |
154 | FILTER_OP_LOAD_FIELD_REF_USER_STRING, | |
155 | FILTER_OP_LOAD_FIELD_REF_USER_SEQUENCE, | |
156 | ||
07dfc1d0 MD |
157 | NR_FILTER_OPS, |
158 | }; | |
159 | ||
160 | typedef uint8_t filter_opcode_t; | |
161 | ||
162 | struct load_op { | |
163 | filter_opcode_t op; | |
164 | char data[0]; | |
165 | /* data to load. Size known by enum filter_opcode and null-term char. */ | |
166 | } __attribute__((packed)); | |
167 | ||
168 | struct binary_op { | |
169 | filter_opcode_t op; | |
170 | } __attribute__((packed)); | |
171 | ||
172 | struct unary_op { | |
173 | filter_opcode_t op; | |
174 | } __attribute__((packed)); | |
175 | ||
176 | /* skip_offset is absolute from start of bytecode */ | |
177 | struct logical_op { | |
178 | filter_opcode_t op; | |
179 | uint16_t skip_offset; /* bytecode insn, if skip second test */ | |
180 | } __attribute__((packed)); | |
181 | ||
182 | struct cast_op { | |
183 | filter_opcode_t op; | |
184 | } __attribute__((packed)); | |
185 | ||
186 | struct return_op { | |
187 | filter_opcode_t op; | |
188 | } __attribute__((packed)); | |
189 | ||
190 | #endif /* _FILTER_BYTECODE_H */ |