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5024c2ac JR |
1 | /* |
2 | * Copyright 2020 EfficiOS, Inc. | |
3 | * | |
4 | * SPDX-License-Identifier: LGPL-2.1-only | |
5 | * | |
6 | */ | |
7 | ||
8 | #ifndef LTTNG_COMMON_BYTECODE_H | |
9 | #define LTTNG_COMMON_BYTECODE_H | |
10 | ||
11 | #include <stdint.h> | |
12 | ||
13 | #include "common/macros.h" | |
14 | #include "common/sessiond-comm/sessiond-comm.h" | |
15 | ||
16 | /* | |
17 | * offsets are absolute from start of bytecode. | |
18 | */ | |
19 | ||
20 | struct field_ref { | |
21 | /* Initially, symbol offset. After link, field offset. */ | |
22 | uint16_t offset; | |
23 | } LTTNG_PACKED; | |
24 | ||
25 | struct get_symbol { | |
26 | /* Symbol offset. */ | |
27 | uint16_t offset; | |
28 | } LTTNG_PACKED; | |
29 | ||
30 | struct get_index_u16 { | |
31 | uint16_t index; | |
32 | } LTTNG_PACKED; | |
33 | ||
34 | struct get_index_u64 { | |
35 | uint64_t index; | |
36 | } LTTNG_PACKED; | |
37 | ||
38 | struct literal_numeric { | |
39 | int64_t v; | |
40 | } LTTNG_PACKED; | |
41 | ||
42 | struct literal_double { | |
43 | double v; | |
44 | } LTTNG_PACKED; | |
45 | ||
46 | struct literal_string { | |
47 | char string[0]; | |
48 | } LTTNG_PACKED; | |
49 | ||
50 | enum bytecode_op { | |
51 | BYTECODE_OP_UNKNOWN = 0, | |
52 | ||
53 | BYTECODE_OP_RETURN = 1, | |
54 | ||
55 | /* binary */ | |
56 | BYTECODE_OP_MUL = 2, | |
57 | BYTECODE_OP_DIV = 3, | |
58 | BYTECODE_OP_MOD = 4, | |
59 | BYTECODE_OP_PLUS = 5, | |
60 | BYTECODE_OP_MINUS = 6, | |
61 | BYTECODE_OP_BIT_RSHIFT = 7, | |
62 | BYTECODE_OP_BIT_LSHIFT = 8, | |
63 | BYTECODE_OP_BIT_AND = 9, | |
64 | BYTECODE_OP_BIT_OR = 10, | |
65 | BYTECODE_OP_BIT_XOR = 11, | |
66 | ||
67 | /* binary comparators */ | |
68 | BYTECODE_OP_EQ = 12, | |
69 | BYTECODE_OP_NE = 13, | |
70 | BYTECODE_OP_GT = 14, | |
71 | BYTECODE_OP_LT = 15, | |
72 | BYTECODE_OP_GE = 16, | |
73 | BYTECODE_OP_LE = 17, | |
74 | ||
75 | /* string binary comparator: apply to */ | |
76 | BYTECODE_OP_EQ_STRING = 18, | |
77 | BYTECODE_OP_NE_STRING = 19, | |
78 | BYTECODE_OP_GT_STRING = 20, | |
79 | BYTECODE_OP_LT_STRING = 21, | |
80 | BYTECODE_OP_GE_STRING = 22, | |
81 | BYTECODE_OP_LE_STRING = 23, | |
82 | ||
83 | /* s64 binary comparator */ | |
84 | BYTECODE_OP_EQ_S64 = 24, | |
85 | BYTECODE_OP_NE_S64 = 25, | |
86 | BYTECODE_OP_GT_S64 = 26, | |
87 | BYTECODE_OP_LT_S64 = 27, | |
88 | BYTECODE_OP_GE_S64 = 28, | |
89 | BYTECODE_OP_LE_S64 = 29, | |
90 | ||
91 | /* double binary comparator */ | |
92 | BYTECODE_OP_EQ_DOUBLE = 30, | |
93 | BYTECODE_OP_NE_DOUBLE = 31, | |
94 | BYTECODE_OP_GT_DOUBLE = 32, | |
95 | BYTECODE_OP_LT_DOUBLE = 33, | |
96 | BYTECODE_OP_GE_DOUBLE = 34, | |
97 | BYTECODE_OP_LE_DOUBLE = 35, | |
98 | ||
99 | /* Mixed S64-double binary comparators */ | |
100 | BYTECODE_OP_EQ_DOUBLE_S64 = 36, | |
101 | BYTECODE_OP_NE_DOUBLE_S64 = 37, | |
102 | BYTECODE_OP_GT_DOUBLE_S64 = 38, | |
103 | BYTECODE_OP_LT_DOUBLE_S64 = 39, | |
104 | BYTECODE_OP_GE_DOUBLE_S64 = 40, | |
105 | BYTECODE_OP_LE_DOUBLE_S64 = 41, | |
106 | ||
107 | BYTECODE_OP_EQ_S64_DOUBLE = 42, | |
108 | BYTECODE_OP_NE_S64_DOUBLE = 43, | |
109 | BYTECODE_OP_GT_S64_DOUBLE = 44, | |
110 | BYTECODE_OP_LT_S64_DOUBLE = 45, | |
111 | BYTECODE_OP_GE_S64_DOUBLE = 46, | |
112 | BYTECODE_OP_LE_S64_DOUBLE = 47, | |
113 | ||
114 | /* unary */ | |
115 | BYTECODE_OP_UNARY_PLUS = 48, | |
116 | BYTECODE_OP_UNARY_MINUS = 49, | |
117 | BYTECODE_OP_UNARY_NOT = 50, | |
118 | BYTECODE_OP_UNARY_PLUS_S64 = 51, | |
119 | BYTECODE_OP_UNARY_MINUS_S64 = 52, | |
120 | BYTECODE_OP_UNARY_NOT_S64 = 53, | |
121 | BYTECODE_OP_UNARY_PLUS_DOUBLE = 54, | |
122 | BYTECODE_OP_UNARY_MINUS_DOUBLE = 55, | |
123 | BYTECODE_OP_UNARY_NOT_DOUBLE = 56, | |
124 | ||
125 | /* logical */ | |
126 | BYTECODE_OP_AND = 57, | |
127 | BYTECODE_OP_OR = 58, | |
128 | ||
129 | /* load field ref */ | |
130 | BYTECODE_OP_LOAD_FIELD_REF = 59, | |
131 | BYTECODE_OP_LOAD_FIELD_REF_STRING = 60, | |
132 | BYTECODE_OP_LOAD_FIELD_REF_SEQUENCE = 61, | |
133 | BYTECODE_OP_LOAD_FIELD_REF_S64 = 62, | |
134 | BYTECODE_OP_LOAD_FIELD_REF_DOUBLE = 63, | |
135 | ||
136 | /* load immediate from operand */ | |
137 | BYTECODE_OP_LOAD_STRING = 64, | |
138 | BYTECODE_OP_LOAD_S64 = 65, | |
139 | BYTECODE_OP_LOAD_DOUBLE = 66, | |
140 | ||
141 | /* cast */ | |
142 | BYTECODE_OP_CAST_TO_S64 = 67, | |
143 | BYTECODE_OP_CAST_DOUBLE_TO_S64 = 68, | |
144 | BYTECODE_OP_CAST_NOP = 69, | |
145 | ||
146 | /* get context ref */ | |
147 | BYTECODE_OP_GET_CONTEXT_REF = 70, | |
148 | BYTECODE_OP_GET_CONTEXT_REF_STRING = 71, | |
149 | BYTECODE_OP_GET_CONTEXT_REF_S64 = 72, | |
150 | BYTECODE_OP_GET_CONTEXT_REF_DOUBLE = 73, | |
151 | ||
152 | /* load userspace field ref */ | |
153 | BYTECODE_OP_LOAD_FIELD_REF_USER_STRING = 74, | |
154 | BYTECODE_OP_LOAD_FIELD_REF_USER_SEQUENCE = 75, | |
155 | ||
156 | /* | |
157 | * load immediate star globbing pattern (literal string) | |
158 | * from immediate | |
159 | */ | |
160 | BYTECODE_OP_LOAD_STAR_GLOB_STRING = 76, | |
161 | ||
162 | /* globbing pattern binary operator: apply to */ | |
163 | BYTECODE_OP_EQ_STAR_GLOB_STRING = 77, | |
164 | BYTECODE_OP_NE_STAR_GLOB_STRING = 78, | |
165 | ||
166 | /* | |
167 | * Instructions for recursive traversal through composed types. | |
168 | */ | |
169 | BYTECODE_OP_GET_CONTEXT_ROOT = 79, | |
170 | BYTECODE_OP_GET_APP_CONTEXT_ROOT = 80, | |
171 | BYTECODE_OP_GET_PAYLOAD_ROOT = 81, | |
172 | ||
173 | BYTECODE_OP_GET_SYMBOL = 82, | |
174 | BYTECODE_OP_GET_SYMBOL_FIELD = 83, | |
175 | BYTECODE_OP_GET_INDEX_U16 = 84, | |
176 | BYTECODE_OP_GET_INDEX_U64 = 85, | |
177 | ||
178 | BYTECODE_OP_LOAD_FIELD = 86, | |
179 | BYTECODE_OP_LOAD_FIELD_S8 = 87, | |
180 | BYTECODE_OP_LOAD_FIELD_S16 = 88, | |
181 | BYTECODE_OP_LOAD_FIELD_S32 = 89, | |
182 | BYTECODE_OP_LOAD_FIELD_S64 = 90, | |
183 | BYTECODE_OP_LOAD_FIELD_U8 = 91, | |
184 | BYTECODE_OP_LOAD_FIELD_U16 = 92, | |
185 | BYTECODE_OP_LOAD_FIELD_U32 = 93, | |
186 | BYTECODE_OP_LOAD_FIELD_U64 = 94, | |
187 | BYTECODE_OP_LOAD_FIELD_STRING = 95, | |
188 | BYTECODE_OP_LOAD_FIELD_SEQUENCE = 96, | |
189 | BYTECODE_OP_LOAD_FIELD_DOUBLE = 97, | |
190 | ||
191 | BYTECODE_OP_UNARY_BIT_NOT = 98, | |
192 | ||
193 | BYTECODE_OP_RETURN_S64 = 99, | |
194 | ||
195 | NR_BYTECODE_OPS, | |
196 | }; | |
197 | ||
198 | typedef uint8_t bytecode_opcode_t; | |
199 | ||
200 | struct load_op { | |
201 | bytecode_opcode_t op; | |
202 | ||
203 | /* | |
204 | * data to load. Size known by enum bytecode_opcode_t and null-term | |
205 | * char. | |
206 | */ | |
207 | char data[0]; | |
208 | } LTTNG_PACKED; | |
209 | ||
210 | struct binary_op { | |
211 | bytecode_opcode_t op; | |
212 | } LTTNG_PACKED; | |
213 | ||
214 | struct unary_op { | |
215 | bytecode_opcode_t op; | |
216 | } LTTNG_PACKED; | |
217 | ||
218 | /* skip_offset is absolute from start of bytecode */ | |
219 | struct logical_op { | |
220 | bytecode_opcode_t op; | |
221 | uint16_t skip_offset; /* bytecode insn, if skip second test */ | |
222 | } LTTNG_PACKED; | |
223 | ||
224 | struct cast_op { | |
225 | bytecode_opcode_t op; | |
226 | } LTTNG_PACKED; | |
227 | ||
228 | struct return_op { | |
229 | bytecode_opcode_t op; | |
230 | } LTTNG_PACKED; | |
231 | ||
232 | struct lttng_bytecode_alloc { | |
233 | uint32_t alloc_len; | |
234 | struct lttng_bytecode b; | |
235 | }; | |
236 | ||
237 | LTTNG_HIDDEN int bytecode_init(struct lttng_bytecode_alloc **fb); | |
238 | LTTNG_HIDDEN int32_t bytecode_reserve(struct lttng_bytecode_alloc **fb, | |
239 | uint32_t align, uint32_t len); | |
240 | LTTNG_HIDDEN int bytecode_push(struct lttng_bytecode_alloc **fb, | |
241 | const void *data, uint32_t align, uint32_t len); | |
242 | LTTNG_HIDDEN int bytecode_push_logical(struct lttng_bytecode_alloc **fb, | |
243 | struct logical_op *data, uint32_t align, uint32_t len, | |
244 | uint16_t *skip_offset); | |
245 | LTTNG_HIDDEN int bytecode_push_get_payload_root( | |
246 | struct lttng_bytecode_alloc **bytecode); | |
247 | LTTNG_HIDDEN int bytecode_push_get_context_root( | |
248 | struct lttng_bytecode_alloc **bytecode); | |
249 | LTTNG_HIDDEN int bytecode_push_get_app_context_root( | |
250 | struct lttng_bytecode_alloc **bytecode); | |
251 | LTTNG_HIDDEN int bytecode_push_get_index_u64( | |
252 | struct lttng_bytecode_alloc **bytecode, uint64_t index); | |
253 | LTTNG_HIDDEN int bytecode_push_get_symbol( | |
254 | struct lttng_bytecode_alloc **bytecode, | |
255 | struct lttng_bytecode_alloc **bytecode_reloc, | |
256 | const char *symbol); | |
257 | LTTNG_HIDDEN struct lttng_bytecode *bytecode_copy( | |
258 | const struct lttng_bytecode *orig_f); | |
259 | ||
260 | static inline | |
261 | unsigned int bytecode_get_len(struct lttng_bytecode *bytecode) | |
262 | { | |
263 | return bytecode->len; | |
264 | } | |
265 | ||
266 | #endif /* LTTNG_COMMON_BYTECODE_H */ |