Commit | Line | Data |
---|---|---|
9f36eaed MJ |
1 | /* SPDX-License-Identifier: MIT |
2 | * | |
80c2a69a | 3 | * lttng-bytecode-interpreter.c |
07dfc1d0 | 4 | * |
80c2a69a | 5 | * LTTng modules bytecode interpreter. |
07dfc1d0 | 6 | * |
bbf3aef5 | 7 | * Copyright (C) 2010-2016 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
07dfc1d0 MD |
8 | */ |
9 | ||
c570be0d | 10 | #include <wrapper/compiler_attributes.h> |
80bb2600 | 11 | #include <wrapper/uaccess.h> |
d9053936 | 12 | #include <wrapper/objtool.h> |
cbc19040 | 13 | #include <wrapper/types.h> |
3834b99f | 14 | #include <linux/swab.h> |
f127e61e | 15 | |
80c2a69a | 16 | #include <lttng/lttng-bytecode.h> |
2df37e95 | 17 | #include <lttng/string-utils.h> |
437d5aa5 | 18 | #include <lttng/events-internal.h> |
07dfc1d0 | 19 | |
f127e61e MD |
20 | /* |
21 | * get_char should be called with page fault handler disabled if it is expected | |
22 | * to handle user-space read. | |
23 | */ | |
24 | static | |
acbe9250 | 25 | char get_char(const struct estack_entry *reg, size_t offset) |
f127e61e MD |
26 | { |
27 | if (unlikely(offset >= reg->u.s.seq_len)) | |
28 | return '\0'; | |
29 | if (reg->u.s.user) { | |
30 | char c; | |
31 | ||
32 | /* Handle invalid access as end of string. */ | |
80bb2600 | 33 | if (unlikely(!lttng_access_ok(VERIFY_READ, |
f127e61e MD |
34 | reg->u.s.user_str + offset, |
35 | sizeof(c)))) | |
36 | return '\0'; | |
37 | /* Handle fault (nonzero return value) as end of string. */ | |
38 | if (unlikely(__copy_from_user_inatomic(&c, | |
39 | reg->u.s.user_str + offset, | |
40 | sizeof(c)))) | |
41 | return '\0'; | |
42 | return c; | |
43 | } else { | |
44 | return reg->u.s.str[offset]; | |
45 | } | |
46 | } | |
47 | ||
07dfc1d0 MD |
48 | /* |
49 | * -1: wildcard found. | |
50 | * -2: unknown escape char. | |
51 | * 0: normal char. | |
52 | */ | |
07dfc1d0 | 53 | static |
f127e61e | 54 | int parse_char(struct estack_entry *reg, char *c, size_t *offset) |
07dfc1d0 | 55 | { |
f127e61e | 56 | switch (*c) { |
07dfc1d0 | 57 | case '\\': |
f127e61e MD |
58 | (*offset)++; |
59 | *c = get_char(reg, *offset); | |
60 | switch (*c) { | |
07dfc1d0 MD |
61 | case '\\': |
62 | case '*': | |
63 | return 0; | |
64 | default: | |
65 | return -2; | |
66 | } | |
67 | case '*': | |
68 | return -1; | |
69 | default: | |
70 | return 0; | |
71 | } | |
72 | } | |
73 | ||
02aca193 PP |
74 | static |
75 | char get_char_at_cb(size_t at, void *data) | |
76 | { | |
77 | return get_char(data, at); | |
78 | } | |
79 | ||
80 | static | |
81 | int stack_star_glob_match(struct estack *stack, int top, const char *cmp_type) | |
82 | { | |
83 | bool has_user = false; | |
02aca193 PP |
84 | int result; |
85 | struct estack_entry *pattern_reg; | |
86 | struct estack_entry *candidate_reg; | |
87 | ||
6f192a16 | 88 | /* Disable the page fault handler when reading from userspace. */ |
02aca193 PP |
89 | if (estack_bx(stack, top)->u.s.user |
90 | || estack_ax(stack, top)->u.s.user) { | |
91 | has_user = true; | |
02aca193 PP |
92 | pagefault_disable(); |
93 | } | |
94 | ||
95 | /* Find out which side is the pattern vs. the candidate. */ | |
96 | if (estack_ax(stack, top)->u.s.literal_type == ESTACK_STRING_LITERAL_TYPE_STAR_GLOB) { | |
97 | pattern_reg = estack_ax(stack, top); | |
98 | candidate_reg = estack_bx(stack, top); | |
99 | } else { | |
100 | pattern_reg = estack_bx(stack, top); | |
101 | candidate_reg = estack_ax(stack, top); | |
102 | } | |
103 | ||
104 | /* Perform the match operation. */ | |
105 | result = !strutils_star_glob_match_char_cb(get_char_at_cb, | |
106 | pattern_reg, get_char_at_cb, candidate_reg); | |
6f192a16 | 107 | if (has_user) |
02aca193 | 108 | pagefault_enable(); |
02aca193 PP |
109 | |
110 | return result; | |
111 | } | |
112 | ||
07dfc1d0 MD |
113 | static |
114 | int stack_strcmp(struct estack *stack, int top, const char *cmp_type) | |
115 | { | |
f127e61e MD |
116 | size_t offset_bx = 0, offset_ax = 0; |
117 | int diff, has_user = 0; | |
f127e61e MD |
118 | |
119 | if (estack_bx(stack, top)->u.s.user | |
120 | || estack_ax(stack, top)->u.s.user) { | |
121 | has_user = 1; | |
f127e61e MD |
122 | pagefault_disable(); |
123 | } | |
07dfc1d0 MD |
124 | |
125 | for (;;) { | |
f127e61e | 126 | int ret; |
07dfc1d0 | 127 | int escaped_r0 = 0; |
f127e61e | 128 | char char_bx, char_ax; |
07dfc1d0 | 129 | |
f127e61e MD |
130 | char_bx = get_char(estack_bx(stack, top), offset_bx); |
131 | char_ax = get_char(estack_ax(stack, top), offset_ax); | |
132 | ||
133 | if (unlikely(char_bx == '\0')) { | |
134 | if (char_ax == '\0') { | |
135 | diff = 0; | |
136 | break; | |
07dfc1d0 | 137 | } else { |
02aca193 PP |
138 | if (estack_ax(stack, top)->u.s.literal_type == |
139 | ESTACK_STRING_LITERAL_TYPE_PLAIN) { | |
f127e61e MD |
140 | ret = parse_char(estack_ax(stack, top), |
141 | &char_ax, &offset_ax); | |
142 | if (ret == -1) { | |
143 | diff = 0; | |
144 | break; | |
145 | } | |
07dfc1d0 | 146 | } |
f127e61e MD |
147 | diff = -1; |
148 | break; | |
07dfc1d0 MD |
149 | } |
150 | } | |
f127e61e | 151 | if (unlikely(char_ax == '\0')) { |
02aca193 PP |
152 | if (estack_bx(stack, top)->u.s.literal_type == |
153 | ESTACK_STRING_LITERAL_TYPE_PLAIN) { | |
abfd272b MD |
154 | ret = parse_char(estack_bx(stack, top), |
155 | &char_bx, &offset_bx); | |
156 | if (ret == -1) { | |
157 | diff = 0; | |
158 | break; | |
07dfc1d0 | 159 | } |
07dfc1d0 | 160 | } |
abfd272b MD |
161 | diff = 1; |
162 | break; | |
07dfc1d0 | 163 | } |
02aca193 PP |
164 | if (estack_bx(stack, top)->u.s.literal_type == |
165 | ESTACK_STRING_LITERAL_TYPE_PLAIN) { | |
f127e61e MD |
166 | ret = parse_char(estack_bx(stack, top), |
167 | &char_bx, &offset_bx); | |
07dfc1d0 | 168 | if (ret == -1) { |
f127e61e MD |
169 | diff = 0; |
170 | break; | |
07dfc1d0 MD |
171 | } else if (ret == -2) { |
172 | escaped_r0 = 1; | |
173 | } | |
174 | /* else compare both char */ | |
175 | } | |
02aca193 PP |
176 | if (estack_ax(stack, top)->u.s.literal_type == |
177 | ESTACK_STRING_LITERAL_TYPE_PLAIN) { | |
f127e61e MD |
178 | ret = parse_char(estack_ax(stack, top), |
179 | &char_ax, &offset_ax); | |
07dfc1d0 | 180 | if (ret == -1) { |
f127e61e MD |
181 | diff = 0; |
182 | break; | |
07dfc1d0 | 183 | } else if (ret == -2) { |
f127e61e MD |
184 | if (!escaped_r0) { |
185 | diff = -1; | |
186 | break; | |
187 | } | |
07dfc1d0 | 188 | } else { |
f127e61e MD |
189 | if (escaped_r0) { |
190 | diff = 1; | |
191 | break; | |
192 | } | |
07dfc1d0 MD |
193 | } |
194 | } else { | |
f127e61e MD |
195 | if (escaped_r0) { |
196 | diff = 1; | |
197 | break; | |
198 | } | |
07dfc1d0 | 199 | } |
f127e61e | 200 | diff = char_bx - char_ax; |
07dfc1d0 MD |
201 | if (diff != 0) |
202 | break; | |
f127e61e MD |
203 | offset_bx++; |
204 | offset_ax++; | |
205 | } | |
6f192a16 | 206 | if (has_user) |
f127e61e | 207 | pagefault_enable(); |
6f192a16 | 208 | |
07dfc1d0 MD |
209 | return diff; |
210 | } | |
211 | ||
8a445457 | 212 | int lttng_bytecode_interpret_error( |
dc7350d6 | 213 | struct lttng_kernel_bytecode_runtime *bytecode_runtime __attribute__((unused)), |
8a445457 | 214 | const char *stack_data __attribute__((unused)), |
346cb5ee | 215 | struct lttng_kernel_probe_ctx *probe_ctx __attribute__((unused)), |
8a445457 | 216 | void *ctx __attribute__((unused))) |
99d223ad | 217 | { |
8a445457 | 218 | return LTTNG_KERNEL_BYTECODE_INTERPRETER_ERROR; |
99d223ad FD |
219 | } |
220 | ||
07dfc1d0 MD |
221 | #ifdef INTERPRETER_USE_SWITCH |
222 | ||
223 | /* | |
224 | * Fallback for compilers that do not support taking address of labels. | |
225 | */ | |
226 | ||
227 | #define START_OP \ | |
228 | start_pc = &bytecode->data[0]; \ | |
229 | for (pc = next_pc = start_pc; pc - start_pc < bytecode->len; \ | |
230 | pc = next_pc) { \ | |
5a15f70c | 231 | dbg_printk("LTTng: Executing op %s (%u)\n", \ |
80c2a69a FD |
232 | lttng_bytecode_print_op((unsigned int) *(bytecode_opcode_t *) pc), \ |
233 | (unsigned int) *(bytecode_opcode_t *) pc); \ | |
234 | switch (*(bytecode_opcode_t *) pc) { | |
07dfc1d0 MD |
235 | |
236 | #define OP(name) case name | |
237 | ||
238 | #define PO break | |
239 | ||
240 | #define END_OP } \ | |
241 | } | |
242 | ||
243 | #else | |
244 | ||
245 | /* | |
246 | * Dispatch-table based interpreter. | |
247 | */ | |
248 | ||
249 | #define START_OP \ | |
3834b99f | 250 | start_pc = &bytecode->code[0]; \ |
07dfc1d0 MD |
251 | pc = next_pc = start_pc; \ |
252 | if (unlikely(pc - start_pc >= bytecode->len)) \ | |
253 | goto end; \ | |
80c2a69a | 254 | goto *dispatch[*(bytecode_opcode_t *) pc]; |
07dfc1d0 MD |
255 | |
256 | #define OP(name) \ | |
257 | LABEL_##name | |
258 | ||
259 | #define PO \ | |
260 | pc = next_pc; \ | |
80c2a69a | 261 | goto *dispatch[*(bytecode_opcode_t *) pc]; |
07dfc1d0 MD |
262 | |
263 | #define END_OP | |
264 | ||
265 | #endif | |
266 | ||
1242217a FD |
267 | #define IS_INTEGER_REGISTER(reg_type) \ |
268 | (reg_type == REG_S64 || reg_type == REG_U64) | |
d644d1df | 269 | |
346cb5ee | 270 | static int context_get_index(struct lttng_kernel_probe_ctx *lttng_probe_ctx, |
3834b99f MD |
271 | struct load_ptr *ptr, |
272 | uint32_t idx) | |
273 | { | |
274 | ||
437d5aa5 MD |
275 | struct lttng_kernel_ctx_field *ctx_field; |
276 | const struct lttng_kernel_event_field *field; | |
ea2d95e4 | 277 | struct lttng_ctx_value v; |
3834b99f MD |
278 | |
279 | ctx_field = <tng_static_ctx->fields[idx]; | |
437d5aa5 | 280 | field = ctx_field->event_field; |
3834b99f MD |
281 | ptr->type = LOAD_OBJECT; |
282 | /* field is only used for types nested within variants. */ | |
283 | ptr->field = NULL; | |
284 | ||
437d5aa5 | 285 | switch (field->type->type) { |
12bb2edb | 286 | case lttng_kernel_type_integer: |
ea2d95e4 | 287 | ctx_field->get_value(ctx_field->priv, lttng_probe_ctx, &v); |
437d5aa5 | 288 | if (lttng_kernel_get_type_integer(field->type)->signedness) { |
3834b99f | 289 | ptr->object_type = OBJECT_TYPE_S64; |
ea2d95e4 | 290 | ptr->u.s64 = v.u.s64; |
3834b99f MD |
291 | ptr->ptr = &ptr->u.s64; |
292 | } else { | |
293 | ptr->object_type = OBJECT_TYPE_U64; | |
ea2d95e4 | 294 | ptr->u.u64 = v.u.s64; /* Cast. */ |
3834b99f MD |
295 | ptr->ptr = &ptr->u.u64; |
296 | } | |
22882c09 | 297 | ptr->rev_bo = lttng_kernel_get_type_integer(field->type)->reverse_byte_order; |
3834b99f | 298 | break; |
437d5aa5 | 299 | case lttng_kernel_type_enum: |
3834b99f | 300 | { |
437d5aa5 MD |
301 | const struct lttng_kernel_type_enum *enum_type = lttng_kernel_get_type_enum(field->type); |
302 | const struct lttng_kernel_type_integer *integer_type = lttng_kernel_get_type_integer(enum_type->container_type); | |
3834b99f | 303 | |
ea2d95e4 | 304 | ctx_field->get_value(ctx_field->priv, lttng_probe_ctx, &v); |
437d5aa5 | 305 | if (integer_type->signedness) { |
29a574c3 | 306 | ptr->object_type = OBJECT_TYPE_SIGNED_ENUM; |
ea2d95e4 | 307 | ptr->u.s64 = v.u.s64; |
3834b99f MD |
308 | ptr->ptr = &ptr->u.s64; |
309 | } else { | |
29a574c3 | 310 | ptr->object_type = OBJECT_TYPE_UNSIGNED_ENUM; |
ea2d95e4 | 311 | ptr->u.u64 = v.u.s64; /* Cast. */ |
3834b99f MD |
312 | ptr->ptr = &ptr->u.u64; |
313 | } | |
22882c09 | 314 | ptr->rev_bo = integer_type->reverse_byte_order; |
3834b99f MD |
315 | break; |
316 | } | |
437d5aa5 MD |
317 | case lttng_kernel_type_array: |
318 | { | |
319 | const struct lttng_kernel_type_array *array_type = lttng_kernel_get_type_array(field->type); | |
320 | ||
321 | if (!lttng_kernel_type_is_bytewise_integer(array_type->elem_type)) { | |
80c2a69a | 322 | printk(KERN_WARNING "LTTng: bytecode: Array nesting only supports integer types.\n"); |
3834b99f MD |
323 | return -EINVAL; |
324 | } | |
437d5aa5 | 325 | if (array_type->encoding == lttng_kernel_string_encoding_none) { |
80c2a69a | 326 | printk(KERN_WARNING "LTTng: bytecode: Only string arrays are supported for contexts.\n"); |
3834b99f MD |
327 | return -EINVAL; |
328 | } | |
329 | ptr->object_type = OBJECT_TYPE_STRING; | |
ea2d95e4 MD |
330 | ctx_field->get_value(ctx_field->priv, lttng_probe_ctx, &v); |
331 | ptr->ptr = v.u.str; | |
3834b99f | 332 | break; |
437d5aa5 MD |
333 | } |
334 | case lttng_kernel_type_sequence: | |
335 | { | |
336 | const struct lttng_kernel_type_sequence *sequence_type = lttng_kernel_get_type_sequence(field->type); | |
337 | ||
338 | if (!lttng_kernel_type_is_bytewise_integer(sequence_type->elem_type)) { | |
80c2a69a | 339 | printk(KERN_WARNING "LTTng: bytecode: Sequence nesting only supports integer types.\n"); |
3834b99f MD |
340 | return -EINVAL; |
341 | } | |
437d5aa5 | 342 | if (sequence_type->encoding == lttng_kernel_string_encoding_none) { |
80c2a69a | 343 | printk(KERN_WARNING "LTTng: bytecode: Only string sequences are supported for contexts.\n"); |
3834b99f MD |
344 | return -EINVAL; |
345 | } | |
346 | ptr->object_type = OBJECT_TYPE_STRING; | |
ea2d95e4 MD |
347 | ctx_field->get_value(ctx_field->priv, lttng_probe_ctx, &v); |
348 | ptr->ptr = v.u.str; | |
3834b99f | 349 | break; |
437d5aa5 | 350 | } |
12bb2edb | 351 | case lttng_kernel_type_string: |
3834b99f | 352 | ptr->object_type = OBJECT_TYPE_STRING; |
ea2d95e4 MD |
353 | ctx_field->get_value(ctx_field->priv, lttng_probe_ctx, &v); |
354 | ptr->ptr = v.u.str; | |
3834b99f | 355 | break; |
437d5aa5 | 356 | case lttng_kernel_type_struct: |
80c2a69a | 357 | printk(KERN_WARNING "LTTng: bytecode: Structure type cannot be loaded.\n"); |
3834b99f | 358 | return -EINVAL; |
437d5aa5 | 359 | case lttng_kernel_type_variant: |
80c2a69a | 360 | printk(KERN_WARNING "LTTng: bytecode: Variant type cannot be loaded.\n"); |
ceabb767 | 361 | return -EINVAL; |
3834b99f | 362 | default: |
437d5aa5 | 363 | printk(KERN_WARNING "LTTng: bytecode: Unknown type: %d", (int) field->type->type); |
3834b99f MD |
364 | return -EINVAL; |
365 | } | |
366 | return 0; | |
367 | } | |
368 | ||
346cb5ee | 369 | static int dynamic_get_index(struct lttng_kernel_probe_ctx *lttng_probe_ctx, |
3834b99f MD |
370 | struct bytecode_runtime *runtime, |
371 | uint64_t index, struct estack_entry *stack_top) | |
372 | { | |
373 | int ret; | |
80c2a69a | 374 | const struct bytecode_get_index_data *gid; |
3834b99f | 375 | |
80c2a69a | 376 | gid = (const struct bytecode_get_index_data *) &runtime->data[index]; |
3834b99f MD |
377 | switch (stack_top->u.ptr.type) { |
378 | case LOAD_OBJECT: | |
379 | switch (stack_top->u.ptr.object_type) { | |
380 | case OBJECT_TYPE_ARRAY: | |
381 | { | |
382 | const char *ptr; | |
383 | ||
384 | WARN_ON_ONCE(gid->offset >= gid->array_len); | |
385 | /* Skip count (unsigned long) */ | |
386 | ptr = *(const char **) (stack_top->u.ptr.ptr + sizeof(unsigned long)); | |
387 | ptr = ptr + gid->offset; | |
388 | stack_top->u.ptr.ptr = ptr; | |
389 | stack_top->u.ptr.object_type = gid->elem.type; | |
390 | stack_top->u.ptr.rev_bo = gid->elem.rev_bo; | |
437d5aa5 | 391 | BUG_ON(stack_top->u.ptr.field->type->type != lttng_kernel_type_array); |
3834b99f MD |
392 | stack_top->u.ptr.field = NULL; |
393 | break; | |
394 | } | |
395 | case OBJECT_TYPE_SEQUENCE: | |
396 | { | |
397 | const char *ptr; | |
398 | size_t ptr_seq_len; | |
399 | ||
400 | ptr = *(const char **) (stack_top->u.ptr.ptr + sizeof(unsigned long)); | |
401 | ptr_seq_len = *(unsigned long *) stack_top->u.ptr.ptr; | |
402 | if (gid->offset >= gid->elem.len * ptr_seq_len) { | |
403 | ret = -EINVAL; | |
404 | goto end; | |
405 | } | |
406 | ptr = ptr + gid->offset; | |
407 | stack_top->u.ptr.ptr = ptr; | |
408 | stack_top->u.ptr.object_type = gid->elem.type; | |
409 | stack_top->u.ptr.rev_bo = gid->elem.rev_bo; | |
437d5aa5 | 410 | BUG_ON(stack_top->u.ptr.field->type->type != lttng_kernel_type_sequence); |
3834b99f MD |
411 | stack_top->u.ptr.field = NULL; |
412 | break; | |
413 | } | |
414 | case OBJECT_TYPE_STRUCT: | |
80c2a69a | 415 | printk(KERN_WARNING "LTTng: bytecode: Nested structures are not supported yet.\n"); |
3834b99f MD |
416 | ret = -EINVAL; |
417 | goto end; | |
418 | case OBJECT_TYPE_VARIANT: | |
419 | default: | |
80c2a69a | 420 | printk(KERN_WARNING "LTTng: bytecode: Unexpected get index type %d", |
3834b99f MD |
421 | (int) stack_top->u.ptr.object_type); |
422 | ret = -EINVAL; | |
423 | goto end; | |
424 | } | |
425 | break; | |
426 | case LOAD_ROOT_CONTEXT: | |
c570be0d MJ |
427 | lttng_fallthrough; |
428 | case LOAD_ROOT_APP_CONTEXT: | |
3834b99f MD |
429 | { |
430 | ret = context_get_index(lttng_probe_ctx, | |
431 | &stack_top->u.ptr, | |
432 | gid->ctx_index); | |
433 | if (ret) { | |
434 | goto end; | |
435 | } | |
436 | break; | |
437 | } | |
438 | case LOAD_ROOT_PAYLOAD: | |
439 | stack_top->u.ptr.ptr += gid->offset; | |
440 | if (gid->elem.type == OBJECT_TYPE_STRING) | |
441 | stack_top->u.ptr.ptr = *(const char * const *) stack_top->u.ptr.ptr; | |
442 | stack_top->u.ptr.object_type = gid->elem.type; | |
443 | stack_top->u.ptr.type = LOAD_OBJECT; | |
03cb0cdd | 444 | stack_top->u.ptr.field = gid->field; |
60e8b0d6 | 445 | stack_top->u.ptr.rev_bo = gid->elem.rev_bo; |
3834b99f MD |
446 | break; |
447 | } | |
196e531f FD |
448 | |
449 | stack_top->type = REG_PTR; | |
450 | ||
3834b99f MD |
451 | return 0; |
452 | ||
453 | end: | |
454 | return ret; | |
455 | } | |
456 | ||
457 | static int dynamic_load_field(struct estack_entry *stack_top) | |
458 | { | |
459 | int ret; | |
460 | ||
461 | switch (stack_top->u.ptr.type) { | |
462 | case LOAD_OBJECT: | |
463 | break; | |
464 | case LOAD_ROOT_CONTEXT: | |
465 | case LOAD_ROOT_APP_CONTEXT: | |
466 | case LOAD_ROOT_PAYLOAD: | |
467 | default: | |
80c2a69a | 468 | dbg_printk("Bytecode warning: cannot load root, missing field name.\n"); |
3834b99f MD |
469 | ret = -EINVAL; |
470 | goto end; | |
471 | } | |
472 | switch (stack_top->u.ptr.object_type) { | |
473 | case OBJECT_TYPE_S8: | |
474 | dbg_printk("op load field s8\n"); | |
475 | stack_top->u.v = *(int8_t *) stack_top->u.ptr.ptr; | |
d644d1df | 476 | stack_top->type = REG_S64; |
3834b99f MD |
477 | break; |
478 | case OBJECT_TYPE_S16: | |
479 | { | |
480 | int16_t tmp; | |
481 | ||
482 | dbg_printk("op load field s16\n"); | |
483 | tmp = *(int16_t *) stack_top->u.ptr.ptr; | |
484 | if (stack_top->u.ptr.rev_bo) | |
485 | __swab16s(&tmp); | |
486 | stack_top->u.v = tmp; | |
d644d1df | 487 | stack_top->type = REG_S64; |
3834b99f MD |
488 | break; |
489 | } | |
490 | case OBJECT_TYPE_S32: | |
491 | { | |
492 | int32_t tmp; | |
493 | ||
494 | dbg_printk("op load field s32\n"); | |
495 | tmp = *(int32_t *) stack_top->u.ptr.ptr; | |
496 | if (stack_top->u.ptr.rev_bo) | |
497 | __swab32s(&tmp); | |
498 | stack_top->u.v = tmp; | |
d644d1df | 499 | stack_top->type = REG_S64; |
3834b99f MD |
500 | break; |
501 | } | |
502 | case OBJECT_TYPE_S64: | |
503 | { | |
504 | int64_t tmp; | |
505 | ||
506 | dbg_printk("op load field s64\n"); | |
507 | tmp = *(int64_t *) stack_top->u.ptr.ptr; | |
508 | if (stack_top->u.ptr.rev_bo) | |
509 | __swab64s(&tmp); | |
510 | stack_top->u.v = tmp; | |
d644d1df | 511 | stack_top->type = REG_S64; |
3834b99f MD |
512 | break; |
513 | } | |
29a574c3 FD |
514 | case OBJECT_TYPE_SIGNED_ENUM: |
515 | { | |
516 | int64_t tmp; | |
517 | ||
518 | dbg_printk("op load field signed enumeration\n"); | |
519 | tmp = *(int64_t *) stack_top->u.ptr.ptr; | |
520 | if (stack_top->u.ptr.rev_bo) | |
521 | __swab64s(&tmp); | |
522 | stack_top->u.v = tmp; | |
523 | stack_top->type = REG_S64; | |
524 | break; | |
525 | } | |
3834b99f MD |
526 | case OBJECT_TYPE_U8: |
527 | dbg_printk("op load field u8\n"); | |
528 | stack_top->u.v = *(uint8_t *) stack_top->u.ptr.ptr; | |
1242217a | 529 | stack_top->type = REG_U64; |
3834b99f MD |
530 | break; |
531 | case OBJECT_TYPE_U16: | |
532 | { | |
533 | uint16_t tmp; | |
534 | ||
5fae98f7 | 535 | dbg_printk("op load field u16\n"); |
3834b99f MD |
536 | tmp = *(uint16_t *) stack_top->u.ptr.ptr; |
537 | if (stack_top->u.ptr.rev_bo) | |
538 | __swab16s(&tmp); | |
539 | stack_top->u.v = tmp; | |
1242217a | 540 | stack_top->type = REG_U64; |
3834b99f MD |
541 | break; |
542 | } | |
543 | case OBJECT_TYPE_U32: | |
544 | { | |
545 | uint32_t tmp; | |
546 | ||
547 | dbg_printk("op load field u32\n"); | |
548 | tmp = *(uint32_t *) stack_top->u.ptr.ptr; | |
549 | if (stack_top->u.ptr.rev_bo) | |
550 | __swab32s(&tmp); | |
551 | stack_top->u.v = tmp; | |
1242217a | 552 | stack_top->type = REG_U64; |
3834b99f MD |
553 | break; |
554 | } | |
555 | case OBJECT_TYPE_U64: | |
556 | { | |
557 | uint64_t tmp; | |
558 | ||
559 | dbg_printk("op load field u64\n"); | |
560 | tmp = *(uint64_t *) stack_top->u.ptr.ptr; | |
561 | if (stack_top->u.ptr.rev_bo) | |
562 | __swab64s(&tmp); | |
563 | stack_top->u.v = tmp; | |
1242217a | 564 | stack_top->type = REG_U64; |
3834b99f MD |
565 | break; |
566 | } | |
29a574c3 FD |
567 | case OBJECT_TYPE_UNSIGNED_ENUM: |
568 | { | |
569 | uint64_t tmp; | |
570 | ||
571 | dbg_printk("op load field unsigned enumeration\n"); | |
572 | tmp = *(uint64_t *) stack_top->u.ptr.ptr; | |
573 | if (stack_top->u.ptr.rev_bo) | |
574 | __swab64s(&tmp); | |
575 | stack_top->u.v = tmp; | |
576 | stack_top->type = REG_U64; | |
577 | break; | |
578 | } | |
3834b99f MD |
579 | case OBJECT_TYPE_STRING: |
580 | { | |
581 | const char *str; | |
582 | ||
583 | dbg_printk("op load field string\n"); | |
584 | str = (const char *) stack_top->u.ptr.ptr; | |
585 | stack_top->u.s.str = str; | |
586 | if (unlikely(!stack_top->u.s.str)) { | |
80c2a69a | 587 | dbg_printk("Bytecode warning: loading a NULL string.\n"); |
3834b99f MD |
588 | ret = -EINVAL; |
589 | goto end; | |
590 | } | |
4efe037b | 591 | stack_top->u.s.seq_len = LTTNG_SIZE_MAX; |
3834b99f MD |
592 | stack_top->u.s.literal_type = |
593 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
d644d1df | 594 | stack_top->type = REG_STRING; |
3834b99f MD |
595 | break; |
596 | } | |
597 | case OBJECT_TYPE_STRING_SEQUENCE: | |
598 | { | |
599 | const char *ptr; | |
600 | ||
601 | dbg_printk("op load field string sequence\n"); | |
602 | ptr = stack_top->u.ptr.ptr; | |
603 | stack_top->u.s.seq_len = *(unsigned long *) ptr; | |
604 | stack_top->u.s.str = *(const char **) (ptr + sizeof(unsigned long)); | |
605 | if (unlikely(!stack_top->u.s.str)) { | |
80c2a69a | 606 | dbg_printk("Bytecode warning: loading a NULL sequence.\n"); |
3834b99f MD |
607 | ret = -EINVAL; |
608 | goto end; | |
609 | } | |
610 | stack_top->u.s.literal_type = | |
611 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
d644d1df | 612 | stack_top->type = REG_STRING; |
3834b99f MD |
613 | break; |
614 | } | |
615 | case OBJECT_TYPE_DYNAMIC: | |
616 | /* | |
617 | * Dynamic types in context are looked up | |
618 | * by context get index. | |
619 | */ | |
620 | ret = -EINVAL; | |
621 | goto end; | |
622 | case OBJECT_TYPE_DOUBLE: | |
623 | ret = -EINVAL; | |
624 | goto end; | |
625 | case OBJECT_TYPE_SEQUENCE: | |
626 | case OBJECT_TYPE_ARRAY: | |
627 | case OBJECT_TYPE_STRUCT: | |
628 | case OBJECT_TYPE_VARIANT: | |
80c2a69a | 629 | printk(KERN_WARNING "LTTng: bytecode: Sequences, arrays, struct and variant cannot be loaded (nested types).\n"); |
3834b99f MD |
630 | ret = -EINVAL; |
631 | goto end; | |
632 | } | |
633 | return 0; | |
634 | ||
635 | end: | |
636 | return ret; | |
637 | } | |
638 | ||
03cb0cdd FD |
639 | static |
640 | int lttng_bytecode_interpret_format_output(struct estack_entry *ax, | |
641 | struct lttng_interpreter_output *output) | |
642 | { | |
643 | int ret; | |
644 | ||
645 | again: | |
646 | switch (ax->type) { | |
647 | case REG_S64: | |
648 | output->type = LTTNG_INTERPRETER_TYPE_S64; | |
649 | output->u.s = ax->u.v; | |
650 | break; | |
651 | case REG_U64: | |
652 | output->type = LTTNG_INTERPRETER_TYPE_U64; | |
653 | output->u.u = (uint64_t) ax->u.v; | |
654 | break; | |
655 | case REG_STRING: | |
656 | output->type = LTTNG_INTERPRETER_TYPE_STRING; | |
657 | output->u.str.str = ax->u.s.str; | |
658 | output->u.str.len = ax->u.s.seq_len; | |
659 | break; | |
660 | case REG_PTR: | |
661 | switch (ax->u.ptr.object_type) { | |
662 | case OBJECT_TYPE_S8: | |
663 | case OBJECT_TYPE_S16: | |
664 | case OBJECT_TYPE_S32: | |
665 | case OBJECT_TYPE_S64: | |
666 | case OBJECT_TYPE_U8: | |
667 | case OBJECT_TYPE_U16: | |
668 | case OBJECT_TYPE_U32: | |
669 | case OBJECT_TYPE_U64: | |
670 | case OBJECT_TYPE_DOUBLE: | |
671 | case OBJECT_TYPE_STRING: | |
672 | case OBJECT_TYPE_STRING_SEQUENCE: | |
673 | ret = dynamic_load_field(ax); | |
674 | if (ret) | |
675 | return ret; | |
676 | /* Retry after loading ptr into stack top. */ | |
677 | goto again; | |
678 | case OBJECT_TYPE_SEQUENCE: | |
679 | output->type = LTTNG_INTERPRETER_TYPE_SEQUENCE; | |
680 | output->u.sequence.ptr = *(const char **) (ax->u.ptr.ptr + sizeof(unsigned long)); | |
681 | output->u.sequence.nr_elem = *(unsigned long *) ax->u.ptr.ptr; | |
437d5aa5 | 682 | output->u.sequence.nested_type = lttng_kernel_get_type_sequence(ax->u.ptr.field->type)->elem_type; |
03cb0cdd FD |
683 | break; |
684 | case OBJECT_TYPE_ARRAY: | |
685 | /* Skip count (unsigned long) */ | |
686 | output->type = LTTNG_INTERPRETER_TYPE_SEQUENCE; | |
687 | output->u.sequence.ptr = *(const char **) (ax->u.ptr.ptr + sizeof(unsigned long)); | |
437d5aa5 MD |
688 | output->u.sequence.nr_elem = lttng_kernel_get_type_array(ax->u.ptr.field->type)->length; |
689 | output->u.sequence.nested_type = lttng_kernel_get_type_array(ax->u.ptr.field->type)->elem_type; | |
03cb0cdd | 690 | break; |
29a574c3 FD |
691 | case OBJECT_TYPE_SIGNED_ENUM: |
692 | ret = dynamic_load_field(ax); | |
693 | if (ret) | |
694 | return ret; | |
695 | output->type = LTTNG_INTERPRETER_TYPE_SIGNED_ENUM; | |
696 | output->u.s = ax->u.v; | |
697 | break; | |
698 | case OBJECT_TYPE_UNSIGNED_ENUM: | |
699 | ret = dynamic_load_field(ax); | |
700 | if (ret) | |
701 | return ret; | |
702 | output->type = LTTNG_INTERPRETER_TYPE_UNSIGNED_ENUM; | |
703 | output->u.u = ax->u.v; | |
704 | break; | |
03cb0cdd FD |
705 | case OBJECT_TYPE_STRUCT: |
706 | case OBJECT_TYPE_VARIANT: | |
707 | default: | |
708 | return -EINVAL; | |
709 | } | |
710 | ||
711 | break; | |
712 | case REG_STAR_GLOB_STRING: | |
713 | case REG_TYPE_UNKNOWN: | |
714 | default: | |
715 | return -EINVAL; | |
716 | } | |
717 | ||
8a445457 | 718 | return 0; |
03cb0cdd FD |
719 | } |
720 | ||
acbe9250 JG |
721 | #ifdef DEBUG |
722 | ||
723 | #define DBG_USER_STR_CUTOFF 32 | |
724 | ||
725 | /* | |
726 | * In debug mode, print user string (truncated, if necessary). | |
727 | */ | |
728 | static inline | |
729 | void dbg_load_ref_user_str_printk(const struct estack_entry *user_str_reg) | |
730 | { | |
731 | size_t pos = 0; | |
732 | char last_char; | |
733 | char user_str[DBG_USER_STR_CUTOFF]; | |
734 | ||
735 | pagefault_disable(); | |
736 | do { | |
737 | last_char = get_char(user_str_reg, pos); | |
738 | user_str[pos] = last_char; | |
739 | pos++; | |
740 | } while (last_char != '\0' && pos < sizeof(user_str)); | |
741 | pagefault_enable(); | |
742 | ||
743 | user_str[sizeof(user_str) - 1] = '\0'; | |
744 | dbg_printk("load field ref user string: '%s%s'\n", user_str, | |
745 | last_char != '\0' ? "[...]" : ""); | |
746 | } | |
747 | #else | |
748 | static inline | |
749 | void dbg_load_ref_user_str_printk(const struct estack_entry *user_str_reg) | |
750 | { | |
751 | } | |
752 | #endif | |
753 | ||
07dfc1d0 | 754 | /* |
8a445457 MD |
755 | * Return LTTNG_KERNEL_BYTECODE_INTERPRETER_OK on success. |
756 | * Return LTTNG_KERNEL_BYTECODE_INTERPRETER_ERROR on error. | |
757 | * | |
758 | * For FILTER bytecode: expect a struct lttng_kernel_bytecode_filter_ctx * | |
759 | * as @ctx argument. | |
760 | * For CAPTURE bytecode: expect a struct lttng_interpreter_output * | |
761 | * as @ctx argument. | |
07dfc1d0 | 762 | */ |
dc7350d6 | 763 | int lttng_bytecode_interpret(struct lttng_kernel_bytecode_runtime *kernel_bytecode, |
03cb0cdd | 764 | const char *interpreter_stack_data, |
346cb5ee | 765 | struct lttng_kernel_probe_ctx *lttng_probe_ctx, |
8a445457 | 766 | void *caller_ctx) |
07dfc1d0 | 767 | { |
8a445457 | 768 | struct bytecode_runtime *bytecode = container_of(kernel_bytecode, struct bytecode_runtime, p); |
07dfc1d0 MD |
769 | void *pc, *next_pc, *start_pc; |
770 | int ret = -EINVAL; | |
771 | uint64_t retval = 0; | |
772 | struct estack _stack; | |
773 | struct estack *stack = &_stack; | |
774 | register int64_t ax = 0, bx = 0; | |
d644d1df | 775 | register enum entry_type ax_t = REG_TYPE_UNKNOWN, bx_t = REG_TYPE_UNKNOWN; |
80c2a69a | 776 | register int top = INTERPRETER_STACK_EMPTY; |
07dfc1d0 | 777 | #ifndef INTERPRETER_USE_SWITCH |
80c2a69a FD |
778 | static void *dispatch[NR_BYTECODE_OPS] = { |
779 | [ BYTECODE_OP_UNKNOWN ] = &&LABEL_BYTECODE_OP_UNKNOWN, | |
07dfc1d0 | 780 | |
80c2a69a | 781 | [ BYTECODE_OP_RETURN ] = &&LABEL_BYTECODE_OP_RETURN, |
07dfc1d0 MD |
782 | |
783 | /* binary */ | |
80c2a69a FD |
784 | [ BYTECODE_OP_MUL ] = &&LABEL_BYTECODE_OP_MUL, |
785 | [ BYTECODE_OP_DIV ] = &&LABEL_BYTECODE_OP_DIV, | |
786 | [ BYTECODE_OP_MOD ] = &&LABEL_BYTECODE_OP_MOD, | |
787 | [ BYTECODE_OP_PLUS ] = &&LABEL_BYTECODE_OP_PLUS, | |
788 | [ BYTECODE_OP_MINUS ] = &&LABEL_BYTECODE_OP_MINUS, | |
789 | [ BYTECODE_OP_BIT_RSHIFT ] = &&LABEL_BYTECODE_OP_BIT_RSHIFT, | |
790 | [ BYTECODE_OP_BIT_LSHIFT ] = &&LABEL_BYTECODE_OP_BIT_LSHIFT, | |
791 | [ BYTECODE_OP_BIT_AND ] = &&LABEL_BYTECODE_OP_BIT_AND, | |
792 | [ BYTECODE_OP_BIT_OR ] = &&LABEL_BYTECODE_OP_BIT_OR, | |
793 | [ BYTECODE_OP_BIT_XOR ] = &&LABEL_BYTECODE_OP_BIT_XOR, | |
07dfc1d0 MD |
794 | |
795 | /* binary comparators */ | |
80c2a69a FD |
796 | [ BYTECODE_OP_EQ ] = &&LABEL_BYTECODE_OP_EQ, |
797 | [ BYTECODE_OP_NE ] = &&LABEL_BYTECODE_OP_NE, | |
798 | [ BYTECODE_OP_GT ] = &&LABEL_BYTECODE_OP_GT, | |
799 | [ BYTECODE_OP_LT ] = &&LABEL_BYTECODE_OP_LT, | |
800 | [ BYTECODE_OP_GE ] = &&LABEL_BYTECODE_OP_GE, | |
801 | [ BYTECODE_OP_LE ] = &&LABEL_BYTECODE_OP_LE, | |
07dfc1d0 MD |
802 | |
803 | /* string binary comparator */ | |
80c2a69a FD |
804 | [ BYTECODE_OP_EQ_STRING ] = &&LABEL_BYTECODE_OP_EQ_STRING, |
805 | [ BYTECODE_OP_NE_STRING ] = &&LABEL_BYTECODE_OP_NE_STRING, | |
806 | [ BYTECODE_OP_GT_STRING ] = &&LABEL_BYTECODE_OP_GT_STRING, | |
807 | [ BYTECODE_OP_LT_STRING ] = &&LABEL_BYTECODE_OP_LT_STRING, | |
808 | [ BYTECODE_OP_GE_STRING ] = &&LABEL_BYTECODE_OP_GE_STRING, | |
809 | [ BYTECODE_OP_LE_STRING ] = &&LABEL_BYTECODE_OP_LE_STRING, | |
07dfc1d0 | 810 | |
02aca193 | 811 | /* globbing pattern binary comparator */ |
80c2a69a FD |
812 | [ BYTECODE_OP_EQ_STAR_GLOB_STRING ] = &&LABEL_BYTECODE_OP_EQ_STAR_GLOB_STRING, |
813 | [ BYTECODE_OP_NE_STAR_GLOB_STRING ] = &&LABEL_BYTECODE_OP_NE_STAR_GLOB_STRING, | |
02aca193 | 814 | |
07dfc1d0 | 815 | /* s64 binary comparator */ |
80c2a69a FD |
816 | [ BYTECODE_OP_EQ_S64 ] = &&LABEL_BYTECODE_OP_EQ_S64, |
817 | [ BYTECODE_OP_NE_S64 ] = &&LABEL_BYTECODE_OP_NE_S64, | |
818 | [ BYTECODE_OP_GT_S64 ] = &&LABEL_BYTECODE_OP_GT_S64, | |
819 | [ BYTECODE_OP_LT_S64 ] = &&LABEL_BYTECODE_OP_LT_S64, | |
820 | [ BYTECODE_OP_GE_S64 ] = &&LABEL_BYTECODE_OP_GE_S64, | |
821 | [ BYTECODE_OP_LE_S64 ] = &&LABEL_BYTECODE_OP_LE_S64, | |
07dfc1d0 MD |
822 | |
823 | /* double binary comparator */ | |
80c2a69a FD |
824 | [ BYTECODE_OP_EQ_DOUBLE ] = &&LABEL_BYTECODE_OP_EQ_DOUBLE, |
825 | [ BYTECODE_OP_NE_DOUBLE ] = &&LABEL_BYTECODE_OP_NE_DOUBLE, | |
826 | [ BYTECODE_OP_GT_DOUBLE ] = &&LABEL_BYTECODE_OP_GT_DOUBLE, | |
827 | [ BYTECODE_OP_LT_DOUBLE ] = &&LABEL_BYTECODE_OP_LT_DOUBLE, | |
828 | [ BYTECODE_OP_GE_DOUBLE ] = &&LABEL_BYTECODE_OP_GE_DOUBLE, | |
829 | [ BYTECODE_OP_LE_DOUBLE ] = &&LABEL_BYTECODE_OP_LE_DOUBLE, | |
07dfc1d0 MD |
830 | |
831 | /* Mixed S64-double binary comparators */ | |
80c2a69a FD |
832 | [ BYTECODE_OP_EQ_DOUBLE_S64 ] = &&LABEL_BYTECODE_OP_EQ_DOUBLE_S64, |
833 | [ BYTECODE_OP_NE_DOUBLE_S64 ] = &&LABEL_BYTECODE_OP_NE_DOUBLE_S64, | |
834 | [ BYTECODE_OP_GT_DOUBLE_S64 ] = &&LABEL_BYTECODE_OP_GT_DOUBLE_S64, | |
835 | [ BYTECODE_OP_LT_DOUBLE_S64 ] = &&LABEL_BYTECODE_OP_LT_DOUBLE_S64, | |
836 | [ BYTECODE_OP_GE_DOUBLE_S64 ] = &&LABEL_BYTECODE_OP_GE_DOUBLE_S64, | |
837 | [ BYTECODE_OP_LE_DOUBLE_S64 ] = &&LABEL_BYTECODE_OP_LE_DOUBLE_S64, | |
838 | ||
839 | [ BYTECODE_OP_EQ_S64_DOUBLE ] = &&LABEL_BYTECODE_OP_EQ_S64_DOUBLE, | |
840 | [ BYTECODE_OP_NE_S64_DOUBLE ] = &&LABEL_BYTECODE_OP_NE_S64_DOUBLE, | |
841 | [ BYTECODE_OP_GT_S64_DOUBLE ] = &&LABEL_BYTECODE_OP_GT_S64_DOUBLE, | |
842 | [ BYTECODE_OP_LT_S64_DOUBLE ] = &&LABEL_BYTECODE_OP_LT_S64_DOUBLE, | |
843 | [ BYTECODE_OP_GE_S64_DOUBLE ] = &&LABEL_BYTECODE_OP_GE_S64_DOUBLE, | |
844 | [ BYTECODE_OP_LE_S64_DOUBLE ] = &&LABEL_BYTECODE_OP_LE_S64_DOUBLE, | |
07dfc1d0 MD |
845 | |
846 | /* unary */ | |
80c2a69a FD |
847 | [ BYTECODE_OP_UNARY_PLUS ] = &&LABEL_BYTECODE_OP_UNARY_PLUS, |
848 | [ BYTECODE_OP_UNARY_MINUS ] = &&LABEL_BYTECODE_OP_UNARY_MINUS, | |
849 | [ BYTECODE_OP_UNARY_NOT ] = &&LABEL_BYTECODE_OP_UNARY_NOT, | |
850 | [ BYTECODE_OP_UNARY_PLUS_S64 ] = &&LABEL_BYTECODE_OP_UNARY_PLUS_S64, | |
851 | [ BYTECODE_OP_UNARY_MINUS_S64 ] = &&LABEL_BYTECODE_OP_UNARY_MINUS_S64, | |
852 | [ BYTECODE_OP_UNARY_NOT_S64 ] = &&LABEL_BYTECODE_OP_UNARY_NOT_S64, | |
853 | [ BYTECODE_OP_UNARY_PLUS_DOUBLE ] = &&LABEL_BYTECODE_OP_UNARY_PLUS_DOUBLE, | |
854 | [ BYTECODE_OP_UNARY_MINUS_DOUBLE ] = &&LABEL_BYTECODE_OP_UNARY_MINUS_DOUBLE, | |
855 | [ BYTECODE_OP_UNARY_NOT_DOUBLE ] = &&LABEL_BYTECODE_OP_UNARY_NOT_DOUBLE, | |
07dfc1d0 MD |
856 | |
857 | /* logical */ | |
80c2a69a FD |
858 | [ BYTECODE_OP_AND ] = &&LABEL_BYTECODE_OP_AND, |
859 | [ BYTECODE_OP_OR ] = &&LABEL_BYTECODE_OP_OR, | |
07dfc1d0 MD |
860 | |
861 | /* load field ref */ | |
80c2a69a FD |
862 | [ BYTECODE_OP_LOAD_FIELD_REF ] = &&LABEL_BYTECODE_OP_LOAD_FIELD_REF, |
863 | [ BYTECODE_OP_LOAD_FIELD_REF_STRING ] = &&LABEL_BYTECODE_OP_LOAD_FIELD_REF_STRING, | |
864 | [ BYTECODE_OP_LOAD_FIELD_REF_SEQUENCE ] = &&LABEL_BYTECODE_OP_LOAD_FIELD_REF_SEQUENCE, | |
865 | [ BYTECODE_OP_LOAD_FIELD_REF_S64 ] = &&LABEL_BYTECODE_OP_LOAD_FIELD_REF_S64, | |
866 | [ BYTECODE_OP_LOAD_FIELD_REF_DOUBLE ] = &&LABEL_BYTECODE_OP_LOAD_FIELD_REF_DOUBLE, | |
07dfc1d0 MD |
867 | |
868 | /* load from immediate operand */ | |
80c2a69a FD |
869 | [ BYTECODE_OP_LOAD_STRING ] = &&LABEL_BYTECODE_OP_LOAD_STRING, |
870 | [ BYTECODE_OP_LOAD_STAR_GLOB_STRING ] = &&LABEL_BYTECODE_OP_LOAD_STAR_GLOB_STRING, | |
871 | [ BYTECODE_OP_LOAD_S64 ] = &&LABEL_BYTECODE_OP_LOAD_S64, | |
872 | [ BYTECODE_OP_LOAD_DOUBLE ] = &&LABEL_BYTECODE_OP_LOAD_DOUBLE, | |
07dfc1d0 MD |
873 | |
874 | /* cast */ | |
80c2a69a FD |
875 | [ BYTECODE_OP_CAST_TO_S64 ] = &&LABEL_BYTECODE_OP_CAST_TO_S64, |
876 | [ BYTECODE_OP_CAST_DOUBLE_TO_S64 ] = &&LABEL_BYTECODE_OP_CAST_DOUBLE_TO_S64, | |
877 | [ BYTECODE_OP_CAST_NOP ] = &&LABEL_BYTECODE_OP_CAST_NOP, | |
07dfc1d0 MD |
878 | |
879 | /* get context ref */ | |
80c2a69a FD |
880 | [ BYTECODE_OP_GET_CONTEXT_REF ] = &&LABEL_BYTECODE_OP_GET_CONTEXT_REF, |
881 | [ BYTECODE_OP_GET_CONTEXT_REF_STRING ] = &&LABEL_BYTECODE_OP_GET_CONTEXT_REF_STRING, | |
882 | [ BYTECODE_OP_GET_CONTEXT_REF_S64 ] = &&LABEL_BYTECODE_OP_GET_CONTEXT_REF_S64, | |
883 | [ BYTECODE_OP_GET_CONTEXT_REF_DOUBLE ] = &&LABEL_BYTECODE_OP_GET_CONTEXT_REF_DOUBLE, | |
f127e61e MD |
884 | |
885 | /* load userspace field ref */ | |
80c2a69a FD |
886 | [ BYTECODE_OP_LOAD_FIELD_REF_USER_STRING ] = &&LABEL_BYTECODE_OP_LOAD_FIELD_REF_USER_STRING, |
887 | [ BYTECODE_OP_LOAD_FIELD_REF_USER_SEQUENCE ] = &&LABEL_BYTECODE_OP_LOAD_FIELD_REF_USER_SEQUENCE, | |
3834b99f MD |
888 | |
889 | /* Instructions for recursive traversal through composed types. */ | |
80c2a69a FD |
890 | [ BYTECODE_OP_GET_CONTEXT_ROOT ] = &&LABEL_BYTECODE_OP_GET_CONTEXT_ROOT, |
891 | [ BYTECODE_OP_GET_APP_CONTEXT_ROOT ] = &&LABEL_BYTECODE_OP_GET_APP_CONTEXT_ROOT, | |
892 | [ BYTECODE_OP_GET_PAYLOAD_ROOT ] = &&LABEL_BYTECODE_OP_GET_PAYLOAD_ROOT, | |
893 | ||
894 | [ BYTECODE_OP_GET_SYMBOL ] = &&LABEL_BYTECODE_OP_GET_SYMBOL, | |
895 | [ BYTECODE_OP_GET_SYMBOL_FIELD ] = &&LABEL_BYTECODE_OP_GET_SYMBOL_FIELD, | |
896 | [ BYTECODE_OP_GET_INDEX_U16 ] = &&LABEL_BYTECODE_OP_GET_INDEX_U16, | |
897 | [ BYTECODE_OP_GET_INDEX_U64 ] = &&LABEL_BYTECODE_OP_GET_INDEX_U64, | |
898 | ||
899 | [ BYTECODE_OP_LOAD_FIELD ] = &&LABEL_BYTECODE_OP_LOAD_FIELD, | |
900 | [ BYTECODE_OP_LOAD_FIELD_S8 ] = &&LABEL_BYTECODE_OP_LOAD_FIELD_S8, | |
901 | [ BYTECODE_OP_LOAD_FIELD_S16 ] = &&LABEL_BYTECODE_OP_LOAD_FIELD_S16, | |
902 | [ BYTECODE_OP_LOAD_FIELD_S32 ] = &&LABEL_BYTECODE_OP_LOAD_FIELD_S32, | |
903 | [ BYTECODE_OP_LOAD_FIELD_S64 ] = &&LABEL_BYTECODE_OP_LOAD_FIELD_S64, | |
904 | [ BYTECODE_OP_LOAD_FIELD_U8 ] = &&LABEL_BYTECODE_OP_LOAD_FIELD_U8, | |
905 | [ BYTECODE_OP_LOAD_FIELD_U16 ] = &&LABEL_BYTECODE_OP_LOAD_FIELD_U16, | |
906 | [ BYTECODE_OP_LOAD_FIELD_U32 ] = &&LABEL_BYTECODE_OP_LOAD_FIELD_U32, | |
907 | [ BYTECODE_OP_LOAD_FIELD_U64 ] = &&LABEL_BYTECODE_OP_LOAD_FIELD_U64, | |
908 | [ BYTECODE_OP_LOAD_FIELD_STRING ] = &&LABEL_BYTECODE_OP_LOAD_FIELD_STRING, | |
909 | [ BYTECODE_OP_LOAD_FIELD_SEQUENCE ] = &&LABEL_BYTECODE_OP_LOAD_FIELD_SEQUENCE, | |
910 | [ BYTECODE_OP_LOAD_FIELD_DOUBLE ] = &&LABEL_BYTECODE_OP_LOAD_FIELD_DOUBLE, | |
911 | ||
912 | [ BYTECODE_OP_UNARY_BIT_NOT ] = &&LABEL_BYTECODE_OP_UNARY_BIT_NOT, | |
913 | ||
914 | [ BYTECODE_OP_RETURN_S64 ] = &&LABEL_BYTECODE_OP_RETURN_S64, | |
07dfc1d0 MD |
915 | }; |
916 | #endif /* #ifndef INTERPRETER_USE_SWITCH */ | |
917 | ||
918 | START_OP | |
919 | ||
80c2a69a FD |
920 | OP(BYTECODE_OP_UNKNOWN): |
921 | OP(BYTECODE_OP_LOAD_FIELD_REF): | |
922 | OP(BYTECODE_OP_GET_CONTEXT_REF): | |
07dfc1d0 MD |
923 | #ifdef INTERPRETER_USE_SWITCH |
924 | default: | |
925 | #endif /* INTERPRETER_USE_SWITCH */ | |
80c2a69a FD |
926 | printk(KERN_WARNING "LTTng: bytecode: unknown bytecode op %u\n", |
927 | (unsigned int) *(bytecode_opcode_t *) pc); | |
07dfc1d0 MD |
928 | ret = -EINVAL; |
929 | goto end; | |
930 | ||
80c2a69a | 931 | OP(BYTECODE_OP_RETURN): |
8a445457 | 932 | /* LTTNG_KERNEL_BYTECODE_INTERPRETER_ERROR or LTTNG_KERNEL_BYTECODE_INTERPRETER_OK */ |
d644d1df FD |
933 | switch (estack_ax_t) { |
934 | case REG_S64: | |
1242217a | 935 | case REG_U64: |
d644d1df FD |
936 | retval = !!estack_ax_v; |
937 | break; | |
938 | case REG_DOUBLE: | |
939 | case REG_STRING: | |
940 | case REG_PTR: | |
8a445457 | 941 | if (kernel_bytecode->type != LTTNG_KERNEL_BYTECODE_TYPE_CAPTURE) { |
03cb0cdd FD |
942 | ret = -EINVAL; |
943 | goto end; | |
944 | } | |
945 | retval = 0; | |
946 | break; | |
d644d1df FD |
947 | case REG_STAR_GLOB_STRING: |
948 | case REG_TYPE_UNKNOWN: | |
949 | ret = -EINVAL; | |
950 | goto end; | |
951 | } | |
07dfc1d0 MD |
952 | ret = 0; |
953 | goto end; | |
954 | ||
8a445457 MD |
955 | OP(BYTECODE_OP_RETURN_S64): |
956 | /* LTTNG_KERNEL_BYTECODE_INTERPRETER_ERROR or LTTNG_KERNEL_BYTECODE_INTERPRETER_OK */ | |
957 | retval = !!estack_ax_v; | |
958 | ret = 0; | |
959 | goto end; | |
960 | ||
07dfc1d0 | 961 | /* binary */ |
80c2a69a FD |
962 | OP(BYTECODE_OP_MUL): |
963 | OP(BYTECODE_OP_DIV): | |
964 | OP(BYTECODE_OP_MOD): | |
965 | OP(BYTECODE_OP_PLUS): | |
966 | OP(BYTECODE_OP_MINUS): | |
967 | printk(KERN_WARNING "LTTng: bytecode: unsupported bytecode op %u\n", | |
968 | (unsigned int) *(bytecode_opcode_t *) pc); | |
07dfc1d0 MD |
969 | ret = -EINVAL; |
970 | goto end; | |
971 | ||
80c2a69a FD |
972 | OP(BYTECODE_OP_EQ): |
973 | OP(BYTECODE_OP_NE): | |
974 | OP(BYTECODE_OP_GT): | |
975 | OP(BYTECODE_OP_LT): | |
976 | OP(BYTECODE_OP_GE): | |
977 | OP(BYTECODE_OP_LE): | |
978 | printk(KERN_WARNING "LTTng: bytecode: unsupported non-specialized bytecode op %u\n", | |
979 | (unsigned int) *(bytecode_opcode_t *) pc); | |
07dfc1d0 MD |
980 | ret = -EINVAL; |
981 | goto end; | |
982 | ||
80c2a69a | 983 | OP(BYTECODE_OP_EQ_STRING): |
07dfc1d0 MD |
984 | { |
985 | int res; | |
986 | ||
987 | res = (stack_strcmp(stack, top, "==") == 0); | |
d644d1df | 988 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 989 | estack_ax_v = res; |
d644d1df | 990 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
991 | next_pc += sizeof(struct binary_op); |
992 | PO; | |
993 | } | |
80c2a69a | 994 | OP(BYTECODE_OP_NE_STRING): |
07dfc1d0 MD |
995 | { |
996 | int res; | |
997 | ||
998 | res = (stack_strcmp(stack, top, "!=") != 0); | |
d644d1df | 999 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 1000 | estack_ax_v = res; |
d644d1df | 1001 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
1002 | next_pc += sizeof(struct binary_op); |
1003 | PO; | |
1004 | } | |
80c2a69a | 1005 | OP(BYTECODE_OP_GT_STRING): |
07dfc1d0 MD |
1006 | { |
1007 | int res; | |
1008 | ||
1009 | res = (stack_strcmp(stack, top, ">") > 0); | |
d644d1df | 1010 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 1011 | estack_ax_v = res; |
d644d1df | 1012 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
1013 | next_pc += sizeof(struct binary_op); |
1014 | PO; | |
1015 | } | |
80c2a69a | 1016 | OP(BYTECODE_OP_LT_STRING): |
07dfc1d0 MD |
1017 | { |
1018 | int res; | |
1019 | ||
1020 | res = (stack_strcmp(stack, top, "<") < 0); | |
d644d1df | 1021 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 1022 | estack_ax_v = res; |
d644d1df | 1023 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
1024 | next_pc += sizeof(struct binary_op); |
1025 | PO; | |
1026 | } | |
80c2a69a | 1027 | OP(BYTECODE_OP_GE_STRING): |
07dfc1d0 MD |
1028 | { |
1029 | int res; | |
1030 | ||
1031 | res = (stack_strcmp(stack, top, ">=") >= 0); | |
d644d1df | 1032 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 1033 | estack_ax_v = res; |
d644d1df | 1034 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
1035 | next_pc += sizeof(struct binary_op); |
1036 | PO; | |
1037 | } | |
80c2a69a | 1038 | OP(BYTECODE_OP_LE_STRING): |
07dfc1d0 MD |
1039 | { |
1040 | int res; | |
1041 | ||
1042 | res = (stack_strcmp(stack, top, "<=") <= 0); | |
d644d1df | 1043 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 1044 | estack_ax_v = res; |
d644d1df | 1045 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
1046 | next_pc += sizeof(struct binary_op); |
1047 | PO; | |
1048 | } | |
1049 | ||
80c2a69a | 1050 | OP(BYTECODE_OP_EQ_STAR_GLOB_STRING): |
02aca193 PP |
1051 | { |
1052 | int res; | |
1053 | ||
1054 | res = (stack_star_glob_match(stack, top, "==") == 0); | |
d644d1df | 1055 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
02aca193 | 1056 | estack_ax_v = res; |
d644d1df | 1057 | estack_ax_t = REG_S64; |
02aca193 PP |
1058 | next_pc += sizeof(struct binary_op); |
1059 | PO; | |
1060 | } | |
80c2a69a | 1061 | OP(BYTECODE_OP_NE_STAR_GLOB_STRING): |
02aca193 PP |
1062 | { |
1063 | int res; | |
1064 | ||
1065 | res = (stack_star_glob_match(stack, top, "!=") != 0); | |
d644d1df | 1066 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
02aca193 | 1067 | estack_ax_v = res; |
d644d1df | 1068 | estack_ax_t = REG_S64; |
02aca193 PP |
1069 | next_pc += sizeof(struct binary_op); |
1070 | PO; | |
1071 | } | |
1072 | ||
80c2a69a | 1073 | OP(BYTECODE_OP_EQ_S64): |
07dfc1d0 MD |
1074 | { |
1075 | int res; | |
1076 | ||
1077 | res = (estack_bx_v == estack_ax_v); | |
d644d1df | 1078 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 1079 | estack_ax_v = res; |
d644d1df | 1080 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
1081 | next_pc += sizeof(struct binary_op); |
1082 | PO; | |
1083 | } | |
80c2a69a | 1084 | OP(BYTECODE_OP_NE_S64): |
07dfc1d0 MD |
1085 | { |
1086 | int res; | |
1087 | ||
1088 | res = (estack_bx_v != estack_ax_v); | |
d644d1df | 1089 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 1090 | estack_ax_v = res; |
d644d1df | 1091 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
1092 | next_pc += sizeof(struct binary_op); |
1093 | PO; | |
1094 | } | |
80c2a69a | 1095 | OP(BYTECODE_OP_GT_S64): |
07dfc1d0 MD |
1096 | { |
1097 | int res; | |
1098 | ||
1099 | res = (estack_bx_v > estack_ax_v); | |
d644d1df | 1100 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 1101 | estack_ax_v = res; |
d644d1df | 1102 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
1103 | next_pc += sizeof(struct binary_op); |
1104 | PO; | |
1105 | } | |
80c2a69a | 1106 | OP(BYTECODE_OP_LT_S64): |
07dfc1d0 MD |
1107 | { |
1108 | int res; | |
1109 | ||
1110 | res = (estack_bx_v < estack_ax_v); | |
d644d1df | 1111 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 1112 | estack_ax_v = res; |
d644d1df | 1113 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
1114 | next_pc += sizeof(struct binary_op); |
1115 | PO; | |
1116 | } | |
80c2a69a | 1117 | OP(BYTECODE_OP_GE_S64): |
07dfc1d0 MD |
1118 | { |
1119 | int res; | |
1120 | ||
1121 | res = (estack_bx_v >= estack_ax_v); | |
d644d1df | 1122 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 1123 | estack_ax_v = res; |
d644d1df | 1124 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
1125 | next_pc += sizeof(struct binary_op); |
1126 | PO; | |
1127 | } | |
80c2a69a | 1128 | OP(BYTECODE_OP_LE_S64): |
07dfc1d0 MD |
1129 | { |
1130 | int res; | |
1131 | ||
1132 | res = (estack_bx_v <= estack_ax_v); | |
d644d1df | 1133 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 1134 | estack_ax_v = res; |
d644d1df | 1135 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
1136 | next_pc += sizeof(struct binary_op); |
1137 | PO; | |
1138 | } | |
1139 | ||
80c2a69a FD |
1140 | OP(BYTECODE_OP_EQ_DOUBLE): |
1141 | OP(BYTECODE_OP_NE_DOUBLE): | |
1142 | OP(BYTECODE_OP_GT_DOUBLE): | |
1143 | OP(BYTECODE_OP_LT_DOUBLE): | |
1144 | OP(BYTECODE_OP_GE_DOUBLE): | |
1145 | OP(BYTECODE_OP_LE_DOUBLE): | |
07dfc1d0 MD |
1146 | { |
1147 | BUG_ON(1); | |
1148 | PO; | |
1149 | } | |
1150 | ||
1151 | /* Mixed S64-double binary comparators */ | |
80c2a69a FD |
1152 | OP(BYTECODE_OP_EQ_DOUBLE_S64): |
1153 | OP(BYTECODE_OP_NE_DOUBLE_S64): | |
1154 | OP(BYTECODE_OP_GT_DOUBLE_S64): | |
1155 | OP(BYTECODE_OP_LT_DOUBLE_S64): | |
1156 | OP(BYTECODE_OP_GE_DOUBLE_S64): | |
1157 | OP(BYTECODE_OP_LE_DOUBLE_S64): | |
1158 | OP(BYTECODE_OP_EQ_S64_DOUBLE): | |
1159 | OP(BYTECODE_OP_NE_S64_DOUBLE): | |
1160 | OP(BYTECODE_OP_GT_S64_DOUBLE): | |
1161 | OP(BYTECODE_OP_LT_S64_DOUBLE): | |
1162 | OP(BYTECODE_OP_GE_S64_DOUBLE): | |
1163 | OP(BYTECODE_OP_LE_S64_DOUBLE): | |
07dfc1d0 MD |
1164 | { |
1165 | BUG_ON(1); | |
1166 | PO; | |
1167 | } | |
80c2a69a | 1168 | OP(BYTECODE_OP_BIT_RSHIFT): |
e16c054b MD |
1169 | { |
1170 | int64_t res; | |
1171 | ||
d644d1df FD |
1172 | if (!IS_INTEGER_REGISTER(estack_ax_t) || !IS_INTEGER_REGISTER(estack_bx_t)) { |
1173 | ret = -EINVAL; | |
1174 | goto end; | |
1175 | } | |
1176 | ||
ea13ec96 MD |
1177 | /* Catch undefined behavior. */ |
1178 | if (unlikely(estack_ax_v < 0 || estack_ax_v >= 64)) { | |
1179 | ret = -EINVAL; | |
1180 | goto end; | |
1181 | } | |
f8d42740 | 1182 | res = ((uint64_t) estack_bx_v >> (uint32_t) estack_ax_v); |
d644d1df | 1183 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
e16c054b | 1184 | estack_ax_v = res; |
1242217a | 1185 | estack_ax_t = REG_U64; |
e16c054b MD |
1186 | next_pc += sizeof(struct binary_op); |
1187 | PO; | |
1188 | } | |
80c2a69a | 1189 | OP(BYTECODE_OP_BIT_LSHIFT): |
e16c054b MD |
1190 | { |
1191 | int64_t res; | |
1192 | ||
d644d1df FD |
1193 | if (!IS_INTEGER_REGISTER(estack_ax_t) || !IS_INTEGER_REGISTER(estack_bx_t)) { |
1194 | ret = -EINVAL; | |
1195 | goto end; | |
1196 | } | |
1197 | ||
ea13ec96 MD |
1198 | /* Catch undefined behavior. */ |
1199 | if (unlikely(estack_ax_v < 0 || estack_ax_v >= 64)) { | |
1200 | ret = -EINVAL; | |
1201 | goto end; | |
1202 | } | |
f8d42740 | 1203 | res = ((uint64_t) estack_bx_v << (uint32_t) estack_ax_v); |
d644d1df | 1204 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
e16c054b | 1205 | estack_ax_v = res; |
1242217a | 1206 | estack_ax_t = REG_U64; |
e16c054b MD |
1207 | next_pc += sizeof(struct binary_op); |
1208 | PO; | |
1209 | } | |
80c2a69a | 1210 | OP(BYTECODE_OP_BIT_AND): |
3834b99f MD |
1211 | { |
1212 | int64_t res; | |
1213 | ||
d644d1df FD |
1214 | if (!IS_INTEGER_REGISTER(estack_ax_t) || !IS_INTEGER_REGISTER(estack_bx_t)) { |
1215 | ret = -EINVAL; | |
1216 | goto end; | |
1217 | } | |
1218 | ||
f8d42740 | 1219 | res = ((uint64_t) estack_bx_v & (uint64_t) estack_ax_v); |
d644d1df | 1220 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
3834b99f | 1221 | estack_ax_v = res; |
1242217a | 1222 | estack_ax_t = REG_U64; |
3834b99f MD |
1223 | next_pc += sizeof(struct binary_op); |
1224 | PO; | |
1225 | } | |
80c2a69a | 1226 | OP(BYTECODE_OP_BIT_OR): |
3834b99f MD |
1227 | { |
1228 | int64_t res; | |
1229 | ||
d644d1df FD |
1230 | if (!IS_INTEGER_REGISTER(estack_ax_t) || !IS_INTEGER_REGISTER(estack_bx_t)) { |
1231 | ret = -EINVAL; | |
1232 | goto end; | |
1233 | } | |
1234 | ||
f8d42740 | 1235 | res = ((uint64_t) estack_bx_v | (uint64_t) estack_ax_v); |
d644d1df | 1236 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
3834b99f | 1237 | estack_ax_v = res; |
1242217a | 1238 | estack_ax_t = REG_U64; |
3834b99f MD |
1239 | next_pc += sizeof(struct binary_op); |
1240 | PO; | |
1241 | } | |
80c2a69a | 1242 | OP(BYTECODE_OP_BIT_XOR): |
3834b99f MD |
1243 | { |
1244 | int64_t res; | |
1245 | ||
d644d1df FD |
1246 | if (!IS_INTEGER_REGISTER(estack_ax_t) || !IS_INTEGER_REGISTER(estack_bx_t)) { |
1247 | ret = -EINVAL; | |
1248 | goto end; | |
1249 | } | |
1250 | ||
f8d42740 | 1251 | res = ((uint64_t) estack_bx_v ^ (uint64_t) estack_ax_v); |
d644d1df | 1252 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
3834b99f | 1253 | estack_ax_v = res; |
1242217a | 1254 | estack_ax_t = REG_U64; |
3834b99f MD |
1255 | next_pc += sizeof(struct binary_op); |
1256 | PO; | |
1257 | } | |
07dfc1d0 MD |
1258 | |
1259 | /* unary */ | |
80c2a69a FD |
1260 | OP(BYTECODE_OP_UNARY_PLUS): |
1261 | OP(BYTECODE_OP_UNARY_MINUS): | |
1262 | OP(BYTECODE_OP_UNARY_NOT): | |
1263 | printk(KERN_WARNING "LTTng: bytecode: unsupported non-specialized bytecode op %u\n", | |
1264 | (unsigned int) *(bytecode_opcode_t *) pc); | |
07dfc1d0 MD |
1265 | ret = -EINVAL; |
1266 | goto end; | |
1267 | ||
1268 | ||
80c2a69a | 1269 | OP(BYTECODE_OP_UNARY_BIT_NOT): |
e16c054b | 1270 | { |
f8d42740 | 1271 | estack_ax_v = ~(uint64_t) estack_ax_v; |
d644d1df | 1272 | estack_ax_t = REG_S64; |
e16c054b MD |
1273 | next_pc += sizeof(struct unary_op); |
1274 | PO; | |
1275 | } | |
1276 | ||
80c2a69a | 1277 | OP(BYTECODE_OP_UNARY_PLUS_S64): |
07dfc1d0 MD |
1278 | { |
1279 | next_pc += sizeof(struct unary_op); | |
1280 | PO; | |
1281 | } | |
80c2a69a | 1282 | OP(BYTECODE_OP_UNARY_MINUS_S64): |
07dfc1d0 MD |
1283 | { |
1284 | estack_ax_v = -estack_ax_v; | |
d644d1df | 1285 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
1286 | next_pc += sizeof(struct unary_op); |
1287 | PO; | |
1288 | } | |
80c2a69a FD |
1289 | OP(BYTECODE_OP_UNARY_PLUS_DOUBLE): |
1290 | OP(BYTECODE_OP_UNARY_MINUS_DOUBLE): | |
07dfc1d0 MD |
1291 | { |
1292 | BUG_ON(1); | |
1293 | PO; | |
1294 | } | |
80c2a69a | 1295 | OP(BYTECODE_OP_UNARY_NOT_S64): |
07dfc1d0 MD |
1296 | { |
1297 | estack_ax_v = !estack_ax_v; | |
d644d1df | 1298 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
1299 | next_pc += sizeof(struct unary_op); |
1300 | PO; | |
1301 | } | |
80c2a69a | 1302 | OP(BYTECODE_OP_UNARY_NOT_DOUBLE): |
07dfc1d0 MD |
1303 | { |
1304 | BUG_ON(1); | |
1305 | PO; | |
1306 | } | |
1307 | ||
1308 | /* logical */ | |
80c2a69a | 1309 | OP(BYTECODE_OP_AND): |
07dfc1d0 MD |
1310 | { |
1311 | struct logical_op *insn = (struct logical_op *) pc; | |
1312 | ||
1313 | /* If AX is 0, skip and evaluate to 0 */ | |
1314 | if (unlikely(estack_ax_v == 0)) { | |
1315 | dbg_printk("Jumping to bytecode offset %u\n", | |
1316 | (unsigned int) insn->skip_offset); | |
1317 | next_pc = start_pc + insn->skip_offset; | |
1318 | } else { | |
1319 | /* Pop 1 when jump not taken */ | |
d644d1df | 1320 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 MD |
1321 | next_pc += sizeof(struct logical_op); |
1322 | } | |
1323 | PO; | |
1324 | } | |
80c2a69a | 1325 | OP(BYTECODE_OP_OR): |
07dfc1d0 MD |
1326 | { |
1327 | struct logical_op *insn = (struct logical_op *) pc; | |
1328 | ||
1329 | /* If AX is nonzero, skip and evaluate to 1 */ | |
1330 | ||
1331 | if (unlikely(estack_ax_v != 0)) { | |
1332 | estack_ax_v = 1; | |
1333 | dbg_printk("Jumping to bytecode offset %u\n", | |
1334 | (unsigned int) insn->skip_offset); | |
1335 | next_pc = start_pc + insn->skip_offset; | |
1336 | } else { | |
1337 | /* Pop 1 when jump not taken */ | |
d644d1df | 1338 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 MD |
1339 | next_pc += sizeof(struct logical_op); |
1340 | } | |
1341 | PO; | |
1342 | } | |
1343 | ||
1344 | ||
1345 | /* load field ref */ | |
80c2a69a | 1346 | OP(BYTECODE_OP_LOAD_FIELD_REF_STRING): |
07dfc1d0 MD |
1347 | { |
1348 | struct load_op *insn = (struct load_op *) pc; | |
1349 | struct field_ref *ref = (struct field_ref *) insn->data; | |
1350 | ||
1351 | dbg_printk("load field ref offset %u type string\n", | |
1352 | ref->offset); | |
d644d1df | 1353 | estack_push(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 1354 | estack_ax(stack, top)->u.s.str = |
03cb0cdd | 1355 | *(const char * const *) &interpreter_stack_data[ref->offset]; |
07dfc1d0 | 1356 | if (unlikely(!estack_ax(stack, top)->u.s.str)) { |
80c2a69a | 1357 | dbg_printk("Bytecode warning: loading a NULL string.\n"); |
07dfc1d0 MD |
1358 | ret = -EINVAL; |
1359 | goto end; | |
1360 | } | |
cbc19040 | 1361 | estack_ax(stack, top)->u.s.seq_len = LTTNG_SIZE_MAX; |
02aca193 PP |
1362 | estack_ax(stack, top)->u.s.literal_type = |
1363 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
f127e61e | 1364 | estack_ax(stack, top)->u.s.user = 0; |
d644d1df | 1365 | estack_ax(stack, top)->type = REG_STRING; |
07dfc1d0 MD |
1366 | dbg_printk("ref load string %s\n", estack_ax(stack, top)->u.s.str); |
1367 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
1368 | PO; | |
1369 | } | |
1370 | ||
80c2a69a | 1371 | OP(BYTECODE_OP_LOAD_FIELD_REF_SEQUENCE): |
07dfc1d0 MD |
1372 | { |
1373 | struct load_op *insn = (struct load_op *) pc; | |
1374 | struct field_ref *ref = (struct field_ref *) insn->data; | |
1375 | ||
1376 | dbg_printk("load field ref offset %u type sequence\n", | |
1377 | ref->offset); | |
d644d1df | 1378 | estack_push(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 1379 | estack_ax(stack, top)->u.s.seq_len = |
03cb0cdd | 1380 | *(unsigned long *) &interpreter_stack_data[ref->offset]; |
07dfc1d0 | 1381 | estack_ax(stack, top)->u.s.str = |
03cb0cdd | 1382 | *(const char **) (&interpreter_stack_data[ref->offset |
07dfc1d0 MD |
1383 | + sizeof(unsigned long)]); |
1384 | if (unlikely(!estack_ax(stack, top)->u.s.str)) { | |
80c2a69a | 1385 | dbg_printk("Bytecode warning: loading a NULL sequence.\n"); |
07dfc1d0 MD |
1386 | ret = -EINVAL; |
1387 | goto end; | |
1388 | } | |
02aca193 PP |
1389 | estack_ax(stack, top)->u.s.literal_type = |
1390 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
f127e61e | 1391 | estack_ax(stack, top)->u.s.user = 0; |
07dfc1d0 MD |
1392 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); |
1393 | PO; | |
1394 | } | |
1395 | ||
80c2a69a | 1396 | OP(BYTECODE_OP_LOAD_FIELD_REF_S64): |
07dfc1d0 MD |
1397 | { |
1398 | struct load_op *insn = (struct load_op *) pc; | |
1399 | struct field_ref *ref = (struct field_ref *) insn->data; | |
1400 | ||
1401 | dbg_printk("load field ref offset %u type s64\n", | |
1402 | ref->offset); | |
d644d1df | 1403 | estack_push(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 1404 | estack_ax_v = |
03cb0cdd | 1405 | ((struct literal_numeric *) &interpreter_stack_data[ref->offset])->v; |
d644d1df | 1406 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
1407 | dbg_printk("ref load s64 %lld\n", |
1408 | (long long) estack_ax_v); | |
1409 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
1410 | PO; | |
1411 | } | |
1412 | ||
80c2a69a | 1413 | OP(BYTECODE_OP_LOAD_FIELD_REF_DOUBLE): |
07dfc1d0 MD |
1414 | { |
1415 | BUG_ON(1); | |
1416 | PO; | |
1417 | } | |
1418 | ||
1419 | /* load from immediate operand */ | |
80c2a69a | 1420 | OP(BYTECODE_OP_LOAD_STRING): |
07dfc1d0 MD |
1421 | { |
1422 | struct load_op *insn = (struct load_op *) pc; | |
1423 | ||
1424 | dbg_printk("load string %s\n", insn->data); | |
d644d1df | 1425 | estack_push(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 1426 | estack_ax(stack, top)->u.s.str = insn->data; |
cbc19040 | 1427 | estack_ax(stack, top)->u.s.seq_len = LTTNG_SIZE_MAX; |
02aca193 PP |
1428 | estack_ax(stack, top)->u.s.literal_type = |
1429 | ESTACK_STRING_LITERAL_TYPE_PLAIN; | |
1430 | estack_ax(stack, top)->u.s.user = 0; | |
1431 | next_pc += sizeof(struct load_op) + strlen(insn->data) + 1; | |
1432 | PO; | |
1433 | } | |
1434 | ||
80c2a69a | 1435 | OP(BYTECODE_OP_LOAD_STAR_GLOB_STRING): |
02aca193 PP |
1436 | { |
1437 | struct load_op *insn = (struct load_op *) pc; | |
1438 | ||
1439 | dbg_printk("load globbing pattern %s\n", insn->data); | |
d644d1df | 1440 | estack_push(stack, top, ax, bx, ax_t, bx_t); |
02aca193 | 1441 | estack_ax(stack, top)->u.s.str = insn->data; |
cbc19040 | 1442 | estack_ax(stack, top)->u.s.seq_len = LTTNG_SIZE_MAX; |
02aca193 PP |
1443 | estack_ax(stack, top)->u.s.literal_type = |
1444 | ESTACK_STRING_LITERAL_TYPE_STAR_GLOB; | |
f127e61e | 1445 | estack_ax(stack, top)->u.s.user = 0; |
07dfc1d0 MD |
1446 | next_pc += sizeof(struct load_op) + strlen(insn->data) + 1; |
1447 | PO; | |
1448 | } | |
1449 | ||
80c2a69a | 1450 | OP(BYTECODE_OP_LOAD_S64): |
07dfc1d0 MD |
1451 | { |
1452 | struct load_op *insn = (struct load_op *) pc; | |
1453 | ||
d644d1df | 1454 | estack_push(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 1455 | estack_ax_v = ((struct literal_numeric *) insn->data)->v; |
d644d1df | 1456 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
1457 | dbg_printk("load s64 %lld\n", |
1458 | (long long) estack_ax_v); | |
1459 | next_pc += sizeof(struct load_op) | |
1460 | + sizeof(struct literal_numeric); | |
1461 | PO; | |
1462 | } | |
1463 | ||
80c2a69a | 1464 | OP(BYTECODE_OP_LOAD_DOUBLE): |
07dfc1d0 MD |
1465 | { |
1466 | BUG_ON(1); | |
1467 | PO; | |
1468 | } | |
1469 | ||
1470 | /* cast */ | |
80c2a69a FD |
1471 | OP(BYTECODE_OP_CAST_TO_S64): |
1472 | printk(KERN_WARNING "LTTng: bytecode: unsupported non-specialized bytecode op %u\n", | |
1473 | (unsigned int) *(bytecode_opcode_t *) pc); | |
07dfc1d0 MD |
1474 | ret = -EINVAL; |
1475 | goto end; | |
1476 | ||
80c2a69a | 1477 | OP(BYTECODE_OP_CAST_DOUBLE_TO_S64): |
07dfc1d0 MD |
1478 | { |
1479 | BUG_ON(1); | |
1480 | PO; | |
1481 | } | |
1482 | ||
80c2a69a | 1483 | OP(BYTECODE_OP_CAST_NOP): |
07dfc1d0 MD |
1484 | { |
1485 | next_pc += sizeof(struct cast_op); | |
1486 | PO; | |
1487 | } | |
1488 | ||
1489 | /* get context ref */ | |
80c2a69a | 1490 | OP(BYTECODE_OP_GET_CONTEXT_REF_STRING): |
07dfc1d0 MD |
1491 | { |
1492 | struct load_op *insn = (struct load_op *) pc; | |
1493 | struct field_ref *ref = (struct field_ref *) insn->data; | |
437d5aa5 | 1494 | struct lttng_kernel_ctx_field *ctx_field; |
ea2d95e4 | 1495 | struct lttng_ctx_value v; |
07dfc1d0 MD |
1496 | |
1497 | dbg_printk("get context ref offset %u type string\n", | |
1498 | ref->offset); | |
1499 | ctx_field = <tng_static_ctx->fields[ref->offset]; | |
ea2d95e4 | 1500 | ctx_field->get_value(ctx_field->priv, lttng_probe_ctx, &v); |
d644d1df | 1501 | estack_push(stack, top, ax, bx, ax_t, bx_t); |
ea2d95e4 | 1502 | estack_ax(stack, top)->u.s.str = v.u.str; |
07dfc1d0 | 1503 | if (unlikely(!estack_ax(stack, top)->u.s.str)) { |
80c2a69a | 1504 | dbg_printk("Bytecode warning: loading a NULL string.\n"); |
07dfc1d0 MD |
1505 | ret = -EINVAL; |
1506 | goto end; | |
1507 | } | |
cbc19040 | 1508 | estack_ax(stack, top)->u.s.seq_len = LTTNG_SIZE_MAX; |
02aca193 PP |
1509 | estack_ax(stack, top)->u.s.literal_type = |
1510 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
f127e61e | 1511 | estack_ax(stack, top)->u.s.user = 0; |
d644d1df | 1512 | estack_ax(stack, top)->type = REG_STRING; |
07dfc1d0 MD |
1513 | dbg_printk("ref get context string %s\n", estack_ax(stack, top)->u.s.str); |
1514 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
1515 | PO; | |
1516 | } | |
1517 | ||
80c2a69a | 1518 | OP(BYTECODE_OP_GET_CONTEXT_REF_S64): |
07dfc1d0 MD |
1519 | { |
1520 | struct load_op *insn = (struct load_op *) pc; | |
1521 | struct field_ref *ref = (struct field_ref *) insn->data; | |
437d5aa5 | 1522 | struct lttng_kernel_ctx_field *ctx_field; |
ea2d95e4 | 1523 | struct lttng_ctx_value v; |
07dfc1d0 MD |
1524 | |
1525 | dbg_printk("get context ref offset %u type s64\n", | |
1526 | ref->offset); | |
1527 | ctx_field = <tng_static_ctx->fields[ref->offset]; | |
ea2d95e4 | 1528 | ctx_field->get_value(ctx_field->priv, lttng_probe_ctx, &v); |
d644d1df | 1529 | estack_push(stack, top, ax, bx, ax_t, bx_t); |
ea2d95e4 | 1530 | estack_ax_v = v.u.s64; |
d644d1df | 1531 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
1532 | dbg_printk("ref get context s64 %lld\n", |
1533 | (long long) estack_ax_v); | |
1534 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
1535 | PO; | |
1536 | } | |
1537 | ||
80c2a69a | 1538 | OP(BYTECODE_OP_GET_CONTEXT_REF_DOUBLE): |
07dfc1d0 MD |
1539 | { |
1540 | BUG_ON(1); | |
1541 | PO; | |
1542 | } | |
1543 | ||
f127e61e | 1544 | /* load userspace field ref */ |
80c2a69a | 1545 | OP(BYTECODE_OP_LOAD_FIELD_REF_USER_STRING): |
f127e61e MD |
1546 | { |
1547 | struct load_op *insn = (struct load_op *) pc; | |
1548 | struct field_ref *ref = (struct field_ref *) insn->data; | |
1549 | ||
1550 | dbg_printk("load field ref offset %u type user string\n", | |
1551 | ref->offset); | |
d644d1df | 1552 | estack_push(stack, top, ax, bx, ax_t, bx_t); |
5b4ad89f | 1553 | estack_ax(stack, top)->u.s.user_str = |
03cb0cdd | 1554 | *(const char * const *) &interpreter_stack_data[ref->offset]; |
acbe9250 | 1555 | if (unlikely(!estack_ax(stack, top)->u.s.user_str)) { |
80c2a69a | 1556 | dbg_printk("Bytecode warning: loading a NULL string.\n"); |
f127e61e MD |
1557 | ret = -EINVAL; |
1558 | goto end; | |
1559 | } | |
cbc19040 | 1560 | estack_ax(stack, top)->u.s.seq_len = LTTNG_SIZE_MAX; |
02aca193 PP |
1561 | estack_ax(stack, top)->u.s.literal_type = |
1562 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
f127e61e | 1563 | estack_ax(stack, top)->u.s.user = 1; |
d644d1df | 1564 | estack_ax(stack, top)->type = REG_STRING; |
acbe9250 | 1565 | dbg_load_ref_user_str_printk(estack_ax(stack, top)); |
f127e61e MD |
1566 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); |
1567 | PO; | |
1568 | } | |
1569 | ||
80c2a69a | 1570 | OP(BYTECODE_OP_LOAD_FIELD_REF_USER_SEQUENCE): |
f127e61e MD |
1571 | { |
1572 | struct load_op *insn = (struct load_op *) pc; | |
1573 | struct field_ref *ref = (struct field_ref *) insn->data; | |
1574 | ||
1575 | dbg_printk("load field ref offset %u type user sequence\n", | |
1576 | ref->offset); | |
d644d1df | 1577 | estack_push(stack, top, ax, bx, ax_t, bx_t); |
f127e61e | 1578 | estack_ax(stack, top)->u.s.seq_len = |
03cb0cdd | 1579 | *(unsigned long *) &interpreter_stack_data[ref->offset]; |
5b4ad89f | 1580 | estack_ax(stack, top)->u.s.user_str = |
03cb0cdd | 1581 | *(const char **) (&interpreter_stack_data[ref->offset |
f127e61e | 1582 | + sizeof(unsigned long)]); |
acbe9250 | 1583 | if (unlikely(!estack_ax(stack, top)->u.s.user_str)) { |
80c2a69a | 1584 | dbg_printk("Bytecode warning: loading a NULL sequence.\n"); |
f127e61e MD |
1585 | ret = -EINVAL; |
1586 | goto end; | |
1587 | } | |
02aca193 PP |
1588 | estack_ax(stack, top)->u.s.literal_type = |
1589 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
f127e61e MD |
1590 | estack_ax(stack, top)->u.s.user = 1; |
1591 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
1592 | PO; | |
1593 | } | |
1594 | ||
80c2a69a | 1595 | OP(BYTECODE_OP_GET_CONTEXT_ROOT): |
3834b99f MD |
1596 | { |
1597 | dbg_printk("op get context root\n"); | |
d644d1df | 1598 | estack_push(stack, top, ax, bx, ax_t, bx_t); |
3834b99f MD |
1599 | estack_ax(stack, top)->u.ptr.type = LOAD_ROOT_CONTEXT; |
1600 | /* "field" only needed for variants. */ | |
1601 | estack_ax(stack, top)->u.ptr.field = NULL; | |
d644d1df | 1602 | estack_ax(stack, top)->type = REG_PTR; |
3834b99f MD |
1603 | next_pc += sizeof(struct load_op); |
1604 | PO; | |
1605 | } | |
1606 | ||
80c2a69a | 1607 | OP(BYTECODE_OP_GET_APP_CONTEXT_ROOT): |
3834b99f MD |
1608 | { |
1609 | BUG_ON(1); | |
1610 | PO; | |
1611 | } | |
1612 | ||
80c2a69a | 1613 | OP(BYTECODE_OP_GET_PAYLOAD_ROOT): |
3834b99f MD |
1614 | { |
1615 | dbg_printk("op get app payload root\n"); | |
d644d1df | 1616 | estack_push(stack, top, ax, bx, ax_t, bx_t); |
3834b99f | 1617 | estack_ax(stack, top)->u.ptr.type = LOAD_ROOT_PAYLOAD; |
03cb0cdd | 1618 | estack_ax(stack, top)->u.ptr.ptr = interpreter_stack_data; |
3834b99f MD |
1619 | /* "field" only needed for variants. */ |
1620 | estack_ax(stack, top)->u.ptr.field = NULL; | |
d644d1df | 1621 | estack_ax(stack, top)->type = REG_PTR; |
3834b99f MD |
1622 | next_pc += sizeof(struct load_op); |
1623 | PO; | |
1624 | } | |
1625 | ||
80c2a69a | 1626 | OP(BYTECODE_OP_GET_SYMBOL): |
3834b99f MD |
1627 | { |
1628 | dbg_printk("op get symbol\n"); | |
1629 | switch (estack_ax(stack, top)->u.ptr.type) { | |
1630 | case LOAD_OBJECT: | |
80c2a69a | 1631 | printk(KERN_WARNING "LTTng: bytecode: Nested fields not implemented yet.\n"); |
3834b99f MD |
1632 | ret = -EINVAL; |
1633 | goto end; | |
1634 | case LOAD_ROOT_CONTEXT: | |
1635 | case LOAD_ROOT_APP_CONTEXT: | |
1636 | case LOAD_ROOT_PAYLOAD: | |
1637 | /* | |
1638 | * symbol lookup is performed by | |
1639 | * specialization. | |
1640 | */ | |
1641 | ret = -EINVAL; | |
1642 | goto end; | |
1643 | } | |
1644 | next_pc += sizeof(struct load_op) + sizeof(struct get_symbol); | |
1645 | PO; | |
1646 | } | |
1647 | ||
80c2a69a | 1648 | OP(BYTECODE_OP_GET_SYMBOL_FIELD): |
3834b99f MD |
1649 | { |
1650 | /* | |
1651 | * Used for first variant encountered in a | |
1652 | * traversal. Variants are not implemented yet. | |
1653 | */ | |
1654 | ret = -EINVAL; | |
1655 | goto end; | |
1656 | } | |
1657 | ||
80c2a69a | 1658 | OP(BYTECODE_OP_GET_INDEX_U16): |
3834b99f MD |
1659 | { |
1660 | struct load_op *insn = (struct load_op *) pc; | |
1661 | struct get_index_u16 *index = (struct get_index_u16 *) insn->data; | |
1662 | ||
1663 | dbg_printk("op get index u16\n"); | |
1664 | ret = dynamic_get_index(lttng_probe_ctx, bytecode, index->index, estack_ax(stack, top)); | |
1665 | if (ret) | |
1666 | goto end; | |
1667 | estack_ax_v = estack_ax(stack, top)->u.v; | |
d644d1df | 1668 | estack_ax_t = estack_ax(stack, top)->type; |
3834b99f MD |
1669 | next_pc += sizeof(struct load_op) + sizeof(struct get_index_u16); |
1670 | PO; | |
1671 | } | |
1672 | ||
80c2a69a | 1673 | OP(BYTECODE_OP_GET_INDEX_U64): |
3834b99f MD |
1674 | { |
1675 | struct load_op *insn = (struct load_op *) pc; | |
1676 | struct get_index_u64 *index = (struct get_index_u64 *) insn->data; | |
1677 | ||
1678 | dbg_printk("op get index u64\n"); | |
1679 | ret = dynamic_get_index(lttng_probe_ctx, bytecode, index->index, estack_ax(stack, top)); | |
1680 | if (ret) | |
1681 | goto end; | |
1682 | estack_ax_v = estack_ax(stack, top)->u.v; | |
d644d1df | 1683 | estack_ax_t = estack_ax(stack, top)->type; |
3834b99f MD |
1684 | next_pc += sizeof(struct load_op) + sizeof(struct get_index_u64); |
1685 | PO; | |
1686 | } | |
1687 | ||
80c2a69a | 1688 | OP(BYTECODE_OP_LOAD_FIELD): |
3834b99f MD |
1689 | { |
1690 | dbg_printk("op load field\n"); | |
1691 | ret = dynamic_load_field(estack_ax(stack, top)); | |
1692 | if (ret) | |
1693 | goto end; | |
1694 | estack_ax_v = estack_ax(stack, top)->u.v; | |
d644d1df | 1695 | estack_ax_t = estack_ax(stack, top)->type; |
3834b99f MD |
1696 | next_pc += sizeof(struct load_op); |
1697 | PO; | |
1698 | } | |
1699 | ||
80c2a69a | 1700 | OP(BYTECODE_OP_LOAD_FIELD_S8): |
3834b99f MD |
1701 | { |
1702 | dbg_printk("op load field s8\n"); | |
1703 | ||
1704 | estack_ax_v = *(int8_t *) estack_ax(stack, top)->u.ptr.ptr; | |
d644d1df | 1705 | estack_ax_t = REG_S64; |
3834b99f MD |
1706 | next_pc += sizeof(struct load_op); |
1707 | PO; | |
1708 | } | |
80c2a69a | 1709 | OP(BYTECODE_OP_LOAD_FIELD_S16): |
3834b99f MD |
1710 | { |
1711 | dbg_printk("op load field s16\n"); | |
1712 | ||
1713 | estack_ax_v = *(int16_t *) estack_ax(stack, top)->u.ptr.ptr; | |
d644d1df | 1714 | estack_ax_t = REG_S64; |
3834b99f MD |
1715 | next_pc += sizeof(struct load_op); |
1716 | PO; | |
1717 | } | |
80c2a69a | 1718 | OP(BYTECODE_OP_LOAD_FIELD_S32): |
3834b99f MD |
1719 | { |
1720 | dbg_printk("op load field s32\n"); | |
1721 | ||
1722 | estack_ax_v = *(int32_t *) estack_ax(stack, top)->u.ptr.ptr; | |
d644d1df | 1723 | estack_ax_t = REG_S64; |
3834b99f MD |
1724 | next_pc += sizeof(struct load_op); |
1725 | PO; | |
1726 | } | |
80c2a69a | 1727 | OP(BYTECODE_OP_LOAD_FIELD_S64): |
3834b99f MD |
1728 | { |
1729 | dbg_printk("op load field s64\n"); | |
1730 | ||
1731 | estack_ax_v = *(int64_t *) estack_ax(stack, top)->u.ptr.ptr; | |
d644d1df | 1732 | estack_ax_t = REG_S64; |
3834b99f MD |
1733 | next_pc += sizeof(struct load_op); |
1734 | PO; | |
1735 | } | |
80c2a69a | 1736 | OP(BYTECODE_OP_LOAD_FIELD_U8): |
3834b99f MD |
1737 | { |
1738 | dbg_printk("op load field u8\n"); | |
1739 | ||
1740 | estack_ax_v = *(uint8_t *) estack_ax(stack, top)->u.ptr.ptr; | |
d644d1df | 1741 | estack_ax_t = REG_S64; |
3834b99f MD |
1742 | next_pc += sizeof(struct load_op); |
1743 | PO; | |
1744 | } | |
80c2a69a | 1745 | OP(BYTECODE_OP_LOAD_FIELD_U16): |
3834b99f MD |
1746 | { |
1747 | dbg_printk("op load field u16\n"); | |
1748 | ||
1749 | estack_ax_v = *(uint16_t *) estack_ax(stack, top)->u.ptr.ptr; | |
d644d1df | 1750 | estack_ax_t = REG_S64; |
3834b99f MD |
1751 | next_pc += sizeof(struct load_op); |
1752 | PO; | |
1753 | } | |
80c2a69a | 1754 | OP(BYTECODE_OP_LOAD_FIELD_U32): |
3834b99f MD |
1755 | { |
1756 | dbg_printk("op load field u32\n"); | |
1757 | ||
1758 | estack_ax_v = *(uint32_t *) estack_ax(stack, top)->u.ptr.ptr; | |
d644d1df | 1759 | estack_ax_t = REG_S64; |
3834b99f MD |
1760 | next_pc += sizeof(struct load_op); |
1761 | PO; | |
1762 | } | |
80c2a69a | 1763 | OP(BYTECODE_OP_LOAD_FIELD_U64): |
3834b99f MD |
1764 | { |
1765 | dbg_printk("op load field u64\n"); | |
1766 | ||
1767 | estack_ax_v = *(uint64_t *) estack_ax(stack, top)->u.ptr.ptr; | |
d644d1df | 1768 | estack_ax_t = REG_S64; |
3834b99f MD |
1769 | next_pc += sizeof(struct load_op); |
1770 | PO; | |
1771 | } | |
80c2a69a | 1772 | OP(BYTECODE_OP_LOAD_FIELD_DOUBLE): |
3834b99f MD |
1773 | { |
1774 | ret = -EINVAL; | |
1775 | goto end; | |
1776 | } | |
1777 | ||
80c2a69a | 1778 | OP(BYTECODE_OP_LOAD_FIELD_STRING): |
3834b99f MD |
1779 | { |
1780 | const char *str; | |
1781 | ||
1782 | dbg_printk("op load field string\n"); | |
1783 | str = (const char *) estack_ax(stack, top)->u.ptr.ptr; | |
1784 | estack_ax(stack, top)->u.s.str = str; | |
1785 | if (unlikely(!estack_ax(stack, top)->u.s.str)) { | |
80c2a69a | 1786 | dbg_printk("Bytecode warning: loading a NULL string.\n"); |
3834b99f MD |
1787 | ret = -EINVAL; |
1788 | goto end; | |
1789 | } | |
4efe037b | 1790 | estack_ax(stack, top)->u.s.seq_len = LTTNG_SIZE_MAX; |
3834b99f MD |
1791 | estack_ax(stack, top)->u.s.literal_type = |
1792 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
d644d1df | 1793 | estack_ax(stack, top)->type = REG_STRING; |
3834b99f MD |
1794 | next_pc += sizeof(struct load_op); |
1795 | PO; | |
1796 | } | |
1797 | ||
80c2a69a | 1798 | OP(BYTECODE_OP_LOAD_FIELD_SEQUENCE): |
3834b99f MD |
1799 | { |
1800 | const char *ptr; | |
1801 | ||
1802 | dbg_printk("op load field string sequence\n"); | |
1803 | ptr = estack_ax(stack, top)->u.ptr.ptr; | |
1804 | estack_ax(stack, top)->u.s.seq_len = *(unsigned long *) ptr; | |
1805 | estack_ax(stack, top)->u.s.str = *(const char **) (ptr + sizeof(unsigned long)); | |
1806 | if (unlikely(!estack_ax(stack, top)->u.s.str)) { | |
80c2a69a | 1807 | dbg_printk("Bytecode warning: loading a NULL sequence.\n"); |
3834b99f MD |
1808 | ret = -EINVAL; |
1809 | goto end; | |
1810 | } | |
1811 | estack_ax(stack, top)->u.s.literal_type = | |
1812 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
d644d1df | 1813 | estack_ax(stack, top)->type = REG_STRING; |
3834b99f MD |
1814 | next_pc += sizeof(struct load_op); |
1815 | PO; | |
1816 | } | |
1817 | ||
07dfc1d0 MD |
1818 | END_OP |
1819 | end: | |
8a445457 | 1820 | /* No need to prepare output if an error occurred. */ |
07dfc1d0 | 1821 | if (ret) |
8a445457 | 1822 | return LTTNG_KERNEL_BYTECODE_INTERPRETER_ERROR; |
03cb0cdd | 1823 | |
8a445457 MD |
1824 | /* Prepare output. */ |
1825 | switch (kernel_bytecode->type) { | |
1826 | case LTTNG_KERNEL_BYTECODE_TYPE_FILTER: | |
1827 | { | |
1828 | struct lttng_kernel_bytecode_filter_ctx *filter_ctx = | |
1829 | (struct lttng_kernel_bytecode_filter_ctx *) caller_ctx; | |
1830 | if (retval) | |
1831 | filter_ctx->result = LTTNG_KERNEL_BYTECODE_FILTER_ACCEPT; | |
1832 | else | |
1833 | filter_ctx->result = LTTNG_KERNEL_BYTECODE_FILTER_REJECT; | |
1834 | break; | |
03cb0cdd | 1835 | } |
8a445457 MD |
1836 | case LTTNG_KERNEL_BYTECODE_TYPE_CAPTURE: |
1837 | ret = lttng_bytecode_interpret_format_output(estack_ax(stack, top), | |
1838 | (struct lttng_interpreter_output *) caller_ctx); | |
1839 | break; | |
1840 | default: | |
1841 | ret = -EINVAL; | |
1842 | break; | |
1843 | } | |
1844 | if (ret) | |
1845 | return LTTNG_KERNEL_BYTECODE_INTERPRETER_ERROR; | |
1846 | else | |
1847 | return LTTNG_KERNEL_BYTECODE_INTERPRETER_OK; | |
03cb0cdd | 1848 | } |
8a445457 | 1849 | LTTNG_STACK_FRAME_NON_STANDARD(lttng_bytecode_interpret); |
07dfc1d0 | 1850 | |
8a445457 MD |
1851 | /* |
1852 | * Return LTTNG_KERNEL_EVENT_FILTER_ACCEPT or LTTNG_KERNEL_EVENT_FILTER_REJECT. | |
1853 | */ | |
1854 | int lttng_kernel_interpret_event_filter(const struct lttng_kernel_event_common *event, | |
1855 | const char *interpreter_stack_data, | |
346cb5ee | 1856 | struct lttng_kernel_probe_ctx *probe_ctx, |
8a445457 | 1857 | void *event_filter_ctx __attribute__((unused))) |
99d223ad | 1858 | { |
dc7350d6 | 1859 | struct lttng_kernel_bytecode_runtime *filter_bc_runtime; |
8a445457 MD |
1860 | struct list_head *filter_bytecode_runtime_head = &event->priv->filter_bytecode_runtime_head; |
1861 | struct lttng_kernel_bytecode_filter_ctx bytecode_filter_ctx; | |
1862 | bool filter_record = false; | |
1863 | ||
1864 | list_for_each_entry_rcu(filter_bc_runtime, filter_bytecode_runtime_head, node) { | |
1865 | if (likely(filter_bc_runtime->interpreter_func(filter_bc_runtime, | |
1866 | interpreter_stack_data, probe_ctx, &bytecode_filter_ctx) == LTTNG_KERNEL_BYTECODE_INTERPRETER_OK)) { | |
1867 | if (unlikely(bytecode_filter_ctx.result == LTTNG_KERNEL_BYTECODE_FILTER_ACCEPT)) { | |
1868 | filter_record = true; | |
1869 | break; | |
1870 | } | |
1871 | } | |
1872 | } | |
1873 | if (filter_record) | |
1874 | return LTTNG_KERNEL_EVENT_FILTER_ACCEPT; | |
1875 | else | |
1876 | return LTTNG_KERNEL_EVENT_FILTER_REJECT; | |
99d223ad FD |
1877 | } |
1878 | ||
07dfc1d0 MD |
1879 | #undef START_OP |
1880 | #undef OP | |
1881 | #undef PO | |
1882 | #undef END_OP |