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 | ||
c190d76e | 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( |
218585b9 | 213 | struct lttng_kernel_bytecode_runtime *bytecode_runtime __attribute__((unused)), |
8a445457 | 214 | const char *stack_data __attribute__((unused)), |
a92e844e | 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 | |
a92e844e | 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; | |
2dc781e0 | 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: |
2dc781e0 | 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; |
2dc781e0 | 290 | ptr->u.s64 = v.u.s64; |
3834b99f MD |
291 | ptr->ptr = &ptr->u.s64; |
292 | } else { | |
293 | ptr->object_type = OBJECT_TYPE_U64; | |
2dc781e0 | 294 | ptr->u.u64 = v.u.s64; /* Cast. */ |
3834b99f MD |
295 | ptr->ptr = &ptr->u.u64; |
296 | } | |
297 | break; | |
437d5aa5 | 298 | case lttng_kernel_type_enum: |
3834b99f | 299 | { |
437d5aa5 MD |
300 | const struct lttng_kernel_type_enum *enum_type = lttng_kernel_get_type_enum(field->type); |
301 | const struct lttng_kernel_type_integer *integer_type = lttng_kernel_get_type_integer(enum_type->container_type); | |
3834b99f | 302 | |
2dc781e0 | 303 | ctx_field->get_value(ctx_field->priv, lttng_probe_ctx, &v); |
437d5aa5 | 304 | if (integer_type->signedness) { |
29a574c3 | 305 | ptr->object_type = OBJECT_TYPE_SIGNED_ENUM; |
2dc781e0 | 306 | ptr->u.s64 = v.u.s64; |
3834b99f MD |
307 | ptr->ptr = &ptr->u.s64; |
308 | } else { | |
29a574c3 | 309 | ptr->object_type = OBJECT_TYPE_UNSIGNED_ENUM; |
2dc781e0 | 310 | ptr->u.u64 = v.u.s64; /* Cast. */ |
3834b99f MD |
311 | ptr->ptr = &ptr->u.u64; |
312 | } | |
313 | break; | |
314 | } | |
437d5aa5 MD |
315 | case lttng_kernel_type_array: |
316 | { | |
317 | const struct lttng_kernel_type_array *array_type = lttng_kernel_get_type_array(field->type); | |
318 | ||
319 | if (!lttng_kernel_type_is_bytewise_integer(array_type->elem_type)) { | |
80c2a69a | 320 | printk(KERN_WARNING "LTTng: bytecode: Array nesting only supports integer types.\n"); |
3834b99f MD |
321 | return -EINVAL; |
322 | } | |
437d5aa5 | 323 | if (array_type->encoding == lttng_kernel_string_encoding_none) { |
80c2a69a | 324 | printk(KERN_WARNING "LTTng: bytecode: Only string arrays are supported for contexts.\n"); |
3834b99f MD |
325 | return -EINVAL; |
326 | } | |
327 | ptr->object_type = OBJECT_TYPE_STRING; | |
2dc781e0 MD |
328 | ctx_field->get_value(ctx_field->priv, lttng_probe_ctx, &v); |
329 | ptr->ptr = v.u.str; | |
3834b99f | 330 | break; |
437d5aa5 MD |
331 | } |
332 | case lttng_kernel_type_sequence: | |
333 | { | |
334 | const struct lttng_kernel_type_sequence *sequence_type = lttng_kernel_get_type_sequence(field->type); | |
335 | ||
336 | if (!lttng_kernel_type_is_bytewise_integer(sequence_type->elem_type)) { | |
80c2a69a | 337 | printk(KERN_WARNING "LTTng: bytecode: Sequence nesting only supports integer types.\n"); |
3834b99f MD |
338 | return -EINVAL; |
339 | } | |
437d5aa5 | 340 | if (sequence_type->encoding == lttng_kernel_string_encoding_none) { |
80c2a69a | 341 | printk(KERN_WARNING "LTTng: bytecode: Only string sequences are supported for contexts.\n"); |
3834b99f MD |
342 | return -EINVAL; |
343 | } | |
344 | ptr->object_type = OBJECT_TYPE_STRING; | |
2dc781e0 MD |
345 | ctx_field->get_value(ctx_field->priv, lttng_probe_ctx, &v); |
346 | ptr->ptr = v.u.str; | |
3834b99f | 347 | break; |
437d5aa5 | 348 | } |
12bb2edb | 349 | case lttng_kernel_type_string: |
3834b99f | 350 | ptr->object_type = OBJECT_TYPE_STRING; |
2dc781e0 MD |
351 | ctx_field->get_value(ctx_field->priv, lttng_probe_ctx, &v); |
352 | ptr->ptr = v.u.str; | |
3834b99f | 353 | break; |
437d5aa5 | 354 | case lttng_kernel_type_struct: |
80c2a69a | 355 | printk(KERN_WARNING "LTTng: bytecode: Structure type cannot be loaded.\n"); |
3834b99f | 356 | return -EINVAL; |
437d5aa5 | 357 | case lttng_kernel_type_variant: |
80c2a69a | 358 | printk(KERN_WARNING "LTTng: bytecode: Variant type cannot be loaded.\n"); |
ceabb767 | 359 | return -EINVAL; |
3834b99f | 360 | default: |
437d5aa5 | 361 | printk(KERN_WARNING "LTTng: bytecode: Unknown type: %d", (int) field->type->type); |
3834b99f MD |
362 | return -EINVAL; |
363 | } | |
364 | return 0; | |
365 | } | |
366 | ||
a92e844e | 367 | static int dynamic_get_index(struct lttng_kernel_probe_ctx *lttng_probe_ctx, |
3834b99f MD |
368 | struct bytecode_runtime *runtime, |
369 | uint64_t index, struct estack_entry *stack_top) | |
370 | { | |
371 | int ret; | |
80c2a69a | 372 | const struct bytecode_get_index_data *gid; |
3834b99f | 373 | |
80c2a69a | 374 | gid = (const struct bytecode_get_index_data *) &runtime->data[index]; |
3834b99f MD |
375 | switch (stack_top->u.ptr.type) { |
376 | case LOAD_OBJECT: | |
377 | switch (stack_top->u.ptr.object_type) { | |
378 | case OBJECT_TYPE_ARRAY: | |
379 | { | |
380 | const char *ptr; | |
381 | ||
382 | WARN_ON_ONCE(gid->offset >= gid->array_len); | |
383 | /* Skip count (unsigned long) */ | |
384 | ptr = *(const char **) (stack_top->u.ptr.ptr + sizeof(unsigned long)); | |
385 | ptr = ptr + gid->offset; | |
386 | stack_top->u.ptr.ptr = ptr; | |
387 | stack_top->u.ptr.object_type = gid->elem.type; | |
388 | stack_top->u.ptr.rev_bo = gid->elem.rev_bo; | |
437d5aa5 | 389 | BUG_ON(stack_top->u.ptr.field->type->type != lttng_kernel_type_array); |
3834b99f MD |
390 | stack_top->u.ptr.field = NULL; |
391 | break; | |
392 | } | |
393 | case OBJECT_TYPE_SEQUENCE: | |
394 | { | |
395 | const char *ptr; | |
396 | size_t ptr_seq_len; | |
397 | ||
398 | ptr = *(const char **) (stack_top->u.ptr.ptr + sizeof(unsigned long)); | |
399 | ptr_seq_len = *(unsigned long *) stack_top->u.ptr.ptr; | |
400 | if (gid->offset >= gid->elem.len * ptr_seq_len) { | |
401 | ret = -EINVAL; | |
402 | goto end; | |
403 | } | |
404 | ptr = ptr + gid->offset; | |
405 | stack_top->u.ptr.ptr = ptr; | |
406 | stack_top->u.ptr.object_type = gid->elem.type; | |
407 | stack_top->u.ptr.rev_bo = gid->elem.rev_bo; | |
437d5aa5 | 408 | BUG_ON(stack_top->u.ptr.field->type->type != lttng_kernel_type_sequence); |
3834b99f MD |
409 | stack_top->u.ptr.field = NULL; |
410 | break; | |
411 | } | |
412 | case OBJECT_TYPE_STRUCT: | |
80c2a69a | 413 | printk(KERN_WARNING "LTTng: bytecode: Nested structures are not supported yet.\n"); |
3834b99f MD |
414 | ret = -EINVAL; |
415 | goto end; | |
416 | case OBJECT_TYPE_VARIANT: | |
417 | default: | |
80c2a69a | 418 | printk(KERN_WARNING "LTTng: bytecode: Unexpected get index type %d", |
3834b99f MD |
419 | (int) stack_top->u.ptr.object_type); |
420 | ret = -EINVAL; | |
421 | goto end; | |
422 | } | |
423 | break; | |
424 | case LOAD_ROOT_CONTEXT: | |
c190d76e MJ |
425 | lttng_fallthrough; |
426 | case LOAD_ROOT_APP_CONTEXT: | |
3834b99f MD |
427 | { |
428 | ret = context_get_index(lttng_probe_ctx, | |
429 | &stack_top->u.ptr, | |
430 | gid->ctx_index); | |
431 | if (ret) { | |
432 | goto end; | |
433 | } | |
434 | break; | |
435 | } | |
436 | case LOAD_ROOT_PAYLOAD: | |
437 | stack_top->u.ptr.ptr += gid->offset; | |
438 | if (gid->elem.type == OBJECT_TYPE_STRING) | |
439 | stack_top->u.ptr.ptr = *(const char * const *) stack_top->u.ptr.ptr; | |
440 | stack_top->u.ptr.object_type = gid->elem.type; | |
441 | stack_top->u.ptr.type = LOAD_OBJECT; | |
03cb0cdd | 442 | stack_top->u.ptr.field = gid->field; |
60e8b0d6 | 443 | stack_top->u.ptr.rev_bo = gid->elem.rev_bo; |
3834b99f MD |
444 | break; |
445 | } | |
196e531f FD |
446 | |
447 | stack_top->type = REG_PTR; | |
448 | ||
3834b99f MD |
449 | return 0; |
450 | ||
451 | end: | |
452 | return ret; | |
453 | } | |
454 | ||
455 | static int dynamic_load_field(struct estack_entry *stack_top) | |
456 | { | |
457 | int ret; | |
458 | ||
459 | switch (stack_top->u.ptr.type) { | |
460 | case LOAD_OBJECT: | |
461 | break; | |
462 | case LOAD_ROOT_CONTEXT: | |
463 | case LOAD_ROOT_APP_CONTEXT: | |
464 | case LOAD_ROOT_PAYLOAD: | |
465 | default: | |
80c2a69a | 466 | dbg_printk("Bytecode warning: cannot load root, missing field name.\n"); |
3834b99f MD |
467 | ret = -EINVAL; |
468 | goto end; | |
469 | } | |
470 | switch (stack_top->u.ptr.object_type) { | |
471 | case OBJECT_TYPE_S8: | |
472 | dbg_printk("op load field s8\n"); | |
473 | stack_top->u.v = *(int8_t *) stack_top->u.ptr.ptr; | |
d644d1df | 474 | stack_top->type = REG_S64; |
3834b99f MD |
475 | break; |
476 | case OBJECT_TYPE_S16: | |
477 | { | |
478 | int16_t tmp; | |
479 | ||
480 | dbg_printk("op load field s16\n"); | |
481 | tmp = *(int16_t *) stack_top->u.ptr.ptr; | |
482 | if (stack_top->u.ptr.rev_bo) | |
483 | __swab16s(&tmp); | |
484 | stack_top->u.v = tmp; | |
d644d1df | 485 | stack_top->type = REG_S64; |
3834b99f MD |
486 | break; |
487 | } | |
488 | case OBJECT_TYPE_S32: | |
489 | { | |
490 | int32_t tmp; | |
491 | ||
492 | dbg_printk("op load field s32\n"); | |
493 | tmp = *(int32_t *) stack_top->u.ptr.ptr; | |
494 | if (stack_top->u.ptr.rev_bo) | |
495 | __swab32s(&tmp); | |
496 | stack_top->u.v = tmp; | |
d644d1df | 497 | stack_top->type = REG_S64; |
3834b99f MD |
498 | break; |
499 | } | |
500 | case OBJECT_TYPE_S64: | |
501 | { | |
502 | int64_t tmp; | |
503 | ||
504 | dbg_printk("op load field s64\n"); | |
505 | tmp = *(int64_t *) stack_top->u.ptr.ptr; | |
506 | if (stack_top->u.ptr.rev_bo) | |
507 | __swab64s(&tmp); | |
508 | stack_top->u.v = tmp; | |
d644d1df | 509 | stack_top->type = REG_S64; |
3834b99f MD |
510 | break; |
511 | } | |
29a574c3 FD |
512 | case OBJECT_TYPE_SIGNED_ENUM: |
513 | { | |
514 | int64_t tmp; | |
515 | ||
516 | dbg_printk("op load field signed enumeration\n"); | |
517 | tmp = *(int64_t *) stack_top->u.ptr.ptr; | |
518 | if (stack_top->u.ptr.rev_bo) | |
519 | __swab64s(&tmp); | |
520 | stack_top->u.v = tmp; | |
521 | stack_top->type = REG_S64; | |
522 | break; | |
523 | } | |
3834b99f MD |
524 | case OBJECT_TYPE_U8: |
525 | dbg_printk("op load field u8\n"); | |
526 | stack_top->u.v = *(uint8_t *) stack_top->u.ptr.ptr; | |
1242217a | 527 | stack_top->type = REG_U64; |
3834b99f MD |
528 | break; |
529 | case OBJECT_TYPE_U16: | |
530 | { | |
531 | uint16_t tmp; | |
532 | ||
5fae98f7 | 533 | dbg_printk("op load field u16\n"); |
3834b99f MD |
534 | tmp = *(uint16_t *) stack_top->u.ptr.ptr; |
535 | if (stack_top->u.ptr.rev_bo) | |
536 | __swab16s(&tmp); | |
537 | stack_top->u.v = tmp; | |
1242217a | 538 | stack_top->type = REG_U64; |
3834b99f MD |
539 | break; |
540 | } | |
541 | case OBJECT_TYPE_U32: | |
542 | { | |
543 | uint32_t tmp; | |
544 | ||
545 | dbg_printk("op load field u32\n"); | |
546 | tmp = *(uint32_t *) stack_top->u.ptr.ptr; | |
547 | if (stack_top->u.ptr.rev_bo) | |
548 | __swab32s(&tmp); | |
549 | stack_top->u.v = tmp; | |
1242217a | 550 | stack_top->type = REG_U64; |
3834b99f MD |
551 | break; |
552 | } | |
553 | case OBJECT_TYPE_U64: | |
554 | { | |
555 | uint64_t tmp; | |
556 | ||
557 | dbg_printk("op load field u64\n"); | |
558 | tmp = *(uint64_t *) stack_top->u.ptr.ptr; | |
559 | if (stack_top->u.ptr.rev_bo) | |
560 | __swab64s(&tmp); | |
561 | stack_top->u.v = tmp; | |
1242217a | 562 | stack_top->type = REG_U64; |
3834b99f MD |
563 | break; |
564 | } | |
29a574c3 FD |
565 | case OBJECT_TYPE_UNSIGNED_ENUM: |
566 | { | |
567 | uint64_t tmp; | |
568 | ||
569 | dbg_printk("op load field unsigned enumeration\n"); | |
570 | tmp = *(uint64_t *) stack_top->u.ptr.ptr; | |
571 | if (stack_top->u.ptr.rev_bo) | |
572 | __swab64s(&tmp); | |
573 | stack_top->u.v = tmp; | |
574 | stack_top->type = REG_U64; | |
575 | break; | |
576 | } | |
3834b99f MD |
577 | case OBJECT_TYPE_STRING: |
578 | { | |
579 | const char *str; | |
580 | ||
581 | dbg_printk("op load field string\n"); | |
582 | str = (const char *) stack_top->u.ptr.ptr; | |
583 | stack_top->u.s.str = str; | |
584 | if (unlikely(!stack_top->u.s.str)) { | |
80c2a69a | 585 | dbg_printk("Bytecode warning: loading a NULL string.\n"); |
3834b99f MD |
586 | ret = -EINVAL; |
587 | goto end; | |
588 | } | |
4efe037b | 589 | stack_top->u.s.seq_len = LTTNG_SIZE_MAX; |
3834b99f MD |
590 | stack_top->u.s.literal_type = |
591 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
d644d1df | 592 | stack_top->type = REG_STRING; |
3834b99f MD |
593 | break; |
594 | } | |
595 | case OBJECT_TYPE_STRING_SEQUENCE: | |
596 | { | |
597 | const char *ptr; | |
598 | ||
599 | dbg_printk("op load field string sequence\n"); | |
600 | ptr = stack_top->u.ptr.ptr; | |
601 | stack_top->u.s.seq_len = *(unsigned long *) ptr; | |
602 | stack_top->u.s.str = *(const char **) (ptr + sizeof(unsigned long)); | |
603 | if (unlikely(!stack_top->u.s.str)) { | |
80c2a69a | 604 | dbg_printk("Bytecode warning: loading a NULL sequence.\n"); |
3834b99f MD |
605 | ret = -EINVAL; |
606 | goto end; | |
607 | } | |
608 | stack_top->u.s.literal_type = | |
609 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
d644d1df | 610 | stack_top->type = REG_STRING; |
3834b99f MD |
611 | break; |
612 | } | |
613 | case OBJECT_TYPE_DYNAMIC: | |
614 | /* | |
615 | * Dynamic types in context are looked up | |
616 | * by context get index. | |
617 | */ | |
618 | ret = -EINVAL; | |
619 | goto end; | |
620 | case OBJECT_TYPE_DOUBLE: | |
621 | ret = -EINVAL; | |
622 | goto end; | |
623 | case OBJECT_TYPE_SEQUENCE: | |
624 | case OBJECT_TYPE_ARRAY: | |
625 | case OBJECT_TYPE_STRUCT: | |
626 | case OBJECT_TYPE_VARIANT: | |
80c2a69a | 627 | printk(KERN_WARNING "LTTng: bytecode: Sequences, arrays, struct and variant cannot be loaded (nested types).\n"); |
3834b99f MD |
628 | ret = -EINVAL; |
629 | goto end; | |
630 | } | |
631 | return 0; | |
632 | ||
633 | end: | |
634 | return ret; | |
635 | } | |
636 | ||
03cb0cdd FD |
637 | static |
638 | int lttng_bytecode_interpret_format_output(struct estack_entry *ax, | |
639 | struct lttng_interpreter_output *output) | |
640 | { | |
641 | int ret; | |
642 | ||
643 | again: | |
644 | switch (ax->type) { | |
645 | case REG_S64: | |
646 | output->type = LTTNG_INTERPRETER_TYPE_S64; | |
647 | output->u.s = ax->u.v; | |
648 | break; | |
649 | case REG_U64: | |
650 | output->type = LTTNG_INTERPRETER_TYPE_U64; | |
651 | output->u.u = (uint64_t) ax->u.v; | |
652 | break; | |
653 | case REG_STRING: | |
654 | output->type = LTTNG_INTERPRETER_TYPE_STRING; | |
655 | output->u.str.str = ax->u.s.str; | |
656 | output->u.str.len = ax->u.s.seq_len; | |
657 | break; | |
658 | case REG_PTR: | |
659 | switch (ax->u.ptr.object_type) { | |
660 | case OBJECT_TYPE_S8: | |
661 | case OBJECT_TYPE_S16: | |
662 | case OBJECT_TYPE_S32: | |
663 | case OBJECT_TYPE_S64: | |
664 | case OBJECT_TYPE_U8: | |
665 | case OBJECT_TYPE_U16: | |
666 | case OBJECT_TYPE_U32: | |
667 | case OBJECT_TYPE_U64: | |
668 | case OBJECT_TYPE_DOUBLE: | |
669 | case OBJECT_TYPE_STRING: | |
670 | case OBJECT_TYPE_STRING_SEQUENCE: | |
671 | ret = dynamic_load_field(ax); | |
672 | if (ret) | |
673 | return ret; | |
674 | /* Retry after loading ptr into stack top. */ | |
675 | goto again; | |
676 | case OBJECT_TYPE_SEQUENCE: | |
677 | output->type = LTTNG_INTERPRETER_TYPE_SEQUENCE; | |
678 | output->u.sequence.ptr = *(const char **) (ax->u.ptr.ptr + sizeof(unsigned long)); | |
679 | output->u.sequence.nr_elem = *(unsigned long *) ax->u.ptr.ptr; | |
437d5aa5 | 680 | output->u.sequence.nested_type = lttng_kernel_get_type_sequence(ax->u.ptr.field->type)->elem_type; |
03cb0cdd FD |
681 | break; |
682 | case OBJECT_TYPE_ARRAY: | |
683 | /* Skip count (unsigned long) */ | |
684 | output->type = LTTNG_INTERPRETER_TYPE_SEQUENCE; | |
685 | output->u.sequence.ptr = *(const char **) (ax->u.ptr.ptr + sizeof(unsigned long)); | |
437d5aa5 MD |
686 | output->u.sequence.nr_elem = lttng_kernel_get_type_array(ax->u.ptr.field->type)->length; |
687 | output->u.sequence.nested_type = lttng_kernel_get_type_array(ax->u.ptr.field->type)->elem_type; | |
03cb0cdd | 688 | break; |
29a574c3 FD |
689 | case OBJECT_TYPE_SIGNED_ENUM: |
690 | ret = dynamic_load_field(ax); | |
691 | if (ret) | |
692 | return ret; | |
693 | output->type = LTTNG_INTERPRETER_TYPE_SIGNED_ENUM; | |
694 | output->u.s = ax->u.v; | |
695 | break; | |
696 | case OBJECT_TYPE_UNSIGNED_ENUM: | |
697 | ret = dynamic_load_field(ax); | |
698 | if (ret) | |
699 | return ret; | |
700 | output->type = LTTNG_INTERPRETER_TYPE_UNSIGNED_ENUM; | |
701 | output->u.u = ax->u.v; | |
702 | break; | |
03cb0cdd FD |
703 | case OBJECT_TYPE_STRUCT: |
704 | case OBJECT_TYPE_VARIANT: | |
705 | default: | |
706 | return -EINVAL; | |
707 | } | |
708 | ||
709 | break; | |
710 | case REG_STAR_GLOB_STRING: | |
711 | case REG_TYPE_UNKNOWN: | |
712 | default: | |
713 | return -EINVAL; | |
714 | } | |
715 | ||
8a445457 | 716 | return 0; |
03cb0cdd FD |
717 | } |
718 | ||
acbe9250 JG |
719 | #ifdef DEBUG |
720 | ||
721 | #define DBG_USER_STR_CUTOFF 32 | |
722 | ||
723 | /* | |
724 | * In debug mode, print user string (truncated, if necessary). | |
725 | */ | |
726 | static inline | |
727 | void dbg_load_ref_user_str_printk(const struct estack_entry *user_str_reg) | |
728 | { | |
729 | size_t pos = 0; | |
730 | char last_char; | |
731 | char user_str[DBG_USER_STR_CUTOFF]; | |
732 | ||
733 | pagefault_disable(); | |
734 | do { | |
735 | last_char = get_char(user_str_reg, pos); | |
736 | user_str[pos] = last_char; | |
737 | pos++; | |
738 | } while (last_char != '\0' && pos < sizeof(user_str)); | |
739 | pagefault_enable(); | |
740 | ||
741 | user_str[sizeof(user_str) - 1] = '\0'; | |
742 | dbg_printk("load field ref user string: '%s%s'\n", user_str, | |
743 | last_char != '\0' ? "[...]" : ""); | |
744 | } | |
745 | #else | |
746 | static inline | |
747 | void dbg_load_ref_user_str_printk(const struct estack_entry *user_str_reg) | |
748 | { | |
749 | } | |
750 | #endif | |
751 | ||
07dfc1d0 | 752 | /* |
8a445457 MD |
753 | * Return LTTNG_KERNEL_BYTECODE_INTERPRETER_OK on success. |
754 | * Return LTTNG_KERNEL_BYTECODE_INTERPRETER_ERROR on error. | |
755 | * | |
756 | * For FILTER bytecode: expect a struct lttng_kernel_bytecode_filter_ctx * | |
757 | * as @ctx argument. | |
758 | * For CAPTURE bytecode: expect a struct lttng_interpreter_output * | |
759 | * as @ctx argument. | |
07dfc1d0 | 760 | */ |
218585b9 | 761 | int lttng_bytecode_interpret(struct lttng_kernel_bytecode_runtime *kernel_bytecode, |
03cb0cdd | 762 | const char *interpreter_stack_data, |
a92e844e | 763 | struct lttng_kernel_probe_ctx *lttng_probe_ctx, |
8a445457 | 764 | void *caller_ctx) |
07dfc1d0 | 765 | { |
8a445457 | 766 | struct bytecode_runtime *bytecode = container_of(kernel_bytecode, struct bytecode_runtime, p); |
07dfc1d0 MD |
767 | void *pc, *next_pc, *start_pc; |
768 | int ret = -EINVAL; | |
769 | uint64_t retval = 0; | |
770 | struct estack _stack; | |
771 | struct estack *stack = &_stack; | |
772 | register int64_t ax = 0, bx = 0; | |
d644d1df | 773 | register enum entry_type ax_t = REG_TYPE_UNKNOWN, bx_t = REG_TYPE_UNKNOWN; |
80c2a69a | 774 | register int top = INTERPRETER_STACK_EMPTY; |
07dfc1d0 | 775 | #ifndef INTERPRETER_USE_SWITCH |
80c2a69a FD |
776 | static void *dispatch[NR_BYTECODE_OPS] = { |
777 | [ BYTECODE_OP_UNKNOWN ] = &&LABEL_BYTECODE_OP_UNKNOWN, | |
07dfc1d0 | 778 | |
80c2a69a | 779 | [ BYTECODE_OP_RETURN ] = &&LABEL_BYTECODE_OP_RETURN, |
07dfc1d0 MD |
780 | |
781 | /* binary */ | |
80c2a69a FD |
782 | [ BYTECODE_OP_MUL ] = &&LABEL_BYTECODE_OP_MUL, |
783 | [ BYTECODE_OP_DIV ] = &&LABEL_BYTECODE_OP_DIV, | |
784 | [ BYTECODE_OP_MOD ] = &&LABEL_BYTECODE_OP_MOD, | |
785 | [ BYTECODE_OP_PLUS ] = &&LABEL_BYTECODE_OP_PLUS, | |
786 | [ BYTECODE_OP_MINUS ] = &&LABEL_BYTECODE_OP_MINUS, | |
787 | [ BYTECODE_OP_BIT_RSHIFT ] = &&LABEL_BYTECODE_OP_BIT_RSHIFT, | |
788 | [ BYTECODE_OP_BIT_LSHIFT ] = &&LABEL_BYTECODE_OP_BIT_LSHIFT, | |
789 | [ BYTECODE_OP_BIT_AND ] = &&LABEL_BYTECODE_OP_BIT_AND, | |
790 | [ BYTECODE_OP_BIT_OR ] = &&LABEL_BYTECODE_OP_BIT_OR, | |
791 | [ BYTECODE_OP_BIT_XOR ] = &&LABEL_BYTECODE_OP_BIT_XOR, | |
07dfc1d0 MD |
792 | |
793 | /* binary comparators */ | |
80c2a69a FD |
794 | [ BYTECODE_OP_EQ ] = &&LABEL_BYTECODE_OP_EQ, |
795 | [ BYTECODE_OP_NE ] = &&LABEL_BYTECODE_OP_NE, | |
796 | [ BYTECODE_OP_GT ] = &&LABEL_BYTECODE_OP_GT, | |
797 | [ BYTECODE_OP_LT ] = &&LABEL_BYTECODE_OP_LT, | |
798 | [ BYTECODE_OP_GE ] = &&LABEL_BYTECODE_OP_GE, | |
799 | [ BYTECODE_OP_LE ] = &&LABEL_BYTECODE_OP_LE, | |
07dfc1d0 MD |
800 | |
801 | /* string binary comparator */ | |
80c2a69a FD |
802 | [ BYTECODE_OP_EQ_STRING ] = &&LABEL_BYTECODE_OP_EQ_STRING, |
803 | [ BYTECODE_OP_NE_STRING ] = &&LABEL_BYTECODE_OP_NE_STRING, | |
804 | [ BYTECODE_OP_GT_STRING ] = &&LABEL_BYTECODE_OP_GT_STRING, | |
805 | [ BYTECODE_OP_LT_STRING ] = &&LABEL_BYTECODE_OP_LT_STRING, | |
806 | [ BYTECODE_OP_GE_STRING ] = &&LABEL_BYTECODE_OP_GE_STRING, | |
807 | [ BYTECODE_OP_LE_STRING ] = &&LABEL_BYTECODE_OP_LE_STRING, | |
07dfc1d0 | 808 | |
02aca193 | 809 | /* globbing pattern binary comparator */ |
80c2a69a FD |
810 | [ BYTECODE_OP_EQ_STAR_GLOB_STRING ] = &&LABEL_BYTECODE_OP_EQ_STAR_GLOB_STRING, |
811 | [ BYTECODE_OP_NE_STAR_GLOB_STRING ] = &&LABEL_BYTECODE_OP_NE_STAR_GLOB_STRING, | |
02aca193 | 812 | |
07dfc1d0 | 813 | /* s64 binary comparator */ |
80c2a69a FD |
814 | [ BYTECODE_OP_EQ_S64 ] = &&LABEL_BYTECODE_OP_EQ_S64, |
815 | [ BYTECODE_OP_NE_S64 ] = &&LABEL_BYTECODE_OP_NE_S64, | |
816 | [ BYTECODE_OP_GT_S64 ] = &&LABEL_BYTECODE_OP_GT_S64, | |
817 | [ BYTECODE_OP_LT_S64 ] = &&LABEL_BYTECODE_OP_LT_S64, | |
818 | [ BYTECODE_OP_GE_S64 ] = &&LABEL_BYTECODE_OP_GE_S64, | |
819 | [ BYTECODE_OP_LE_S64 ] = &&LABEL_BYTECODE_OP_LE_S64, | |
07dfc1d0 MD |
820 | |
821 | /* double binary comparator */ | |
80c2a69a FD |
822 | [ BYTECODE_OP_EQ_DOUBLE ] = &&LABEL_BYTECODE_OP_EQ_DOUBLE, |
823 | [ BYTECODE_OP_NE_DOUBLE ] = &&LABEL_BYTECODE_OP_NE_DOUBLE, | |
824 | [ BYTECODE_OP_GT_DOUBLE ] = &&LABEL_BYTECODE_OP_GT_DOUBLE, | |
825 | [ BYTECODE_OP_LT_DOUBLE ] = &&LABEL_BYTECODE_OP_LT_DOUBLE, | |
826 | [ BYTECODE_OP_GE_DOUBLE ] = &&LABEL_BYTECODE_OP_GE_DOUBLE, | |
827 | [ BYTECODE_OP_LE_DOUBLE ] = &&LABEL_BYTECODE_OP_LE_DOUBLE, | |
07dfc1d0 MD |
828 | |
829 | /* Mixed S64-double binary comparators */ | |
80c2a69a FD |
830 | [ BYTECODE_OP_EQ_DOUBLE_S64 ] = &&LABEL_BYTECODE_OP_EQ_DOUBLE_S64, |
831 | [ BYTECODE_OP_NE_DOUBLE_S64 ] = &&LABEL_BYTECODE_OP_NE_DOUBLE_S64, | |
832 | [ BYTECODE_OP_GT_DOUBLE_S64 ] = &&LABEL_BYTECODE_OP_GT_DOUBLE_S64, | |
833 | [ BYTECODE_OP_LT_DOUBLE_S64 ] = &&LABEL_BYTECODE_OP_LT_DOUBLE_S64, | |
834 | [ BYTECODE_OP_GE_DOUBLE_S64 ] = &&LABEL_BYTECODE_OP_GE_DOUBLE_S64, | |
835 | [ BYTECODE_OP_LE_DOUBLE_S64 ] = &&LABEL_BYTECODE_OP_LE_DOUBLE_S64, | |
836 | ||
837 | [ BYTECODE_OP_EQ_S64_DOUBLE ] = &&LABEL_BYTECODE_OP_EQ_S64_DOUBLE, | |
838 | [ BYTECODE_OP_NE_S64_DOUBLE ] = &&LABEL_BYTECODE_OP_NE_S64_DOUBLE, | |
839 | [ BYTECODE_OP_GT_S64_DOUBLE ] = &&LABEL_BYTECODE_OP_GT_S64_DOUBLE, | |
840 | [ BYTECODE_OP_LT_S64_DOUBLE ] = &&LABEL_BYTECODE_OP_LT_S64_DOUBLE, | |
841 | [ BYTECODE_OP_GE_S64_DOUBLE ] = &&LABEL_BYTECODE_OP_GE_S64_DOUBLE, | |
842 | [ BYTECODE_OP_LE_S64_DOUBLE ] = &&LABEL_BYTECODE_OP_LE_S64_DOUBLE, | |
07dfc1d0 MD |
843 | |
844 | /* unary */ | |
80c2a69a FD |
845 | [ BYTECODE_OP_UNARY_PLUS ] = &&LABEL_BYTECODE_OP_UNARY_PLUS, |
846 | [ BYTECODE_OP_UNARY_MINUS ] = &&LABEL_BYTECODE_OP_UNARY_MINUS, | |
847 | [ BYTECODE_OP_UNARY_NOT ] = &&LABEL_BYTECODE_OP_UNARY_NOT, | |
848 | [ BYTECODE_OP_UNARY_PLUS_S64 ] = &&LABEL_BYTECODE_OP_UNARY_PLUS_S64, | |
849 | [ BYTECODE_OP_UNARY_MINUS_S64 ] = &&LABEL_BYTECODE_OP_UNARY_MINUS_S64, | |
850 | [ BYTECODE_OP_UNARY_NOT_S64 ] = &&LABEL_BYTECODE_OP_UNARY_NOT_S64, | |
851 | [ BYTECODE_OP_UNARY_PLUS_DOUBLE ] = &&LABEL_BYTECODE_OP_UNARY_PLUS_DOUBLE, | |
852 | [ BYTECODE_OP_UNARY_MINUS_DOUBLE ] = &&LABEL_BYTECODE_OP_UNARY_MINUS_DOUBLE, | |
853 | [ BYTECODE_OP_UNARY_NOT_DOUBLE ] = &&LABEL_BYTECODE_OP_UNARY_NOT_DOUBLE, | |
07dfc1d0 MD |
854 | |
855 | /* logical */ | |
80c2a69a FD |
856 | [ BYTECODE_OP_AND ] = &&LABEL_BYTECODE_OP_AND, |
857 | [ BYTECODE_OP_OR ] = &&LABEL_BYTECODE_OP_OR, | |
07dfc1d0 MD |
858 | |
859 | /* load field ref */ | |
80c2a69a FD |
860 | [ BYTECODE_OP_LOAD_FIELD_REF ] = &&LABEL_BYTECODE_OP_LOAD_FIELD_REF, |
861 | [ BYTECODE_OP_LOAD_FIELD_REF_STRING ] = &&LABEL_BYTECODE_OP_LOAD_FIELD_REF_STRING, | |
862 | [ BYTECODE_OP_LOAD_FIELD_REF_SEQUENCE ] = &&LABEL_BYTECODE_OP_LOAD_FIELD_REF_SEQUENCE, | |
863 | [ BYTECODE_OP_LOAD_FIELD_REF_S64 ] = &&LABEL_BYTECODE_OP_LOAD_FIELD_REF_S64, | |
864 | [ BYTECODE_OP_LOAD_FIELD_REF_DOUBLE ] = &&LABEL_BYTECODE_OP_LOAD_FIELD_REF_DOUBLE, | |
07dfc1d0 MD |
865 | |
866 | /* load from immediate operand */ | |
80c2a69a FD |
867 | [ BYTECODE_OP_LOAD_STRING ] = &&LABEL_BYTECODE_OP_LOAD_STRING, |
868 | [ BYTECODE_OP_LOAD_STAR_GLOB_STRING ] = &&LABEL_BYTECODE_OP_LOAD_STAR_GLOB_STRING, | |
869 | [ BYTECODE_OP_LOAD_S64 ] = &&LABEL_BYTECODE_OP_LOAD_S64, | |
870 | [ BYTECODE_OP_LOAD_DOUBLE ] = &&LABEL_BYTECODE_OP_LOAD_DOUBLE, | |
07dfc1d0 MD |
871 | |
872 | /* cast */ | |
80c2a69a FD |
873 | [ BYTECODE_OP_CAST_TO_S64 ] = &&LABEL_BYTECODE_OP_CAST_TO_S64, |
874 | [ BYTECODE_OP_CAST_DOUBLE_TO_S64 ] = &&LABEL_BYTECODE_OP_CAST_DOUBLE_TO_S64, | |
875 | [ BYTECODE_OP_CAST_NOP ] = &&LABEL_BYTECODE_OP_CAST_NOP, | |
07dfc1d0 MD |
876 | |
877 | /* get context ref */ | |
80c2a69a FD |
878 | [ BYTECODE_OP_GET_CONTEXT_REF ] = &&LABEL_BYTECODE_OP_GET_CONTEXT_REF, |
879 | [ BYTECODE_OP_GET_CONTEXT_REF_STRING ] = &&LABEL_BYTECODE_OP_GET_CONTEXT_REF_STRING, | |
880 | [ BYTECODE_OP_GET_CONTEXT_REF_S64 ] = &&LABEL_BYTECODE_OP_GET_CONTEXT_REF_S64, | |
881 | [ BYTECODE_OP_GET_CONTEXT_REF_DOUBLE ] = &&LABEL_BYTECODE_OP_GET_CONTEXT_REF_DOUBLE, | |
f127e61e MD |
882 | |
883 | /* load userspace field ref */ | |
80c2a69a FD |
884 | [ BYTECODE_OP_LOAD_FIELD_REF_USER_STRING ] = &&LABEL_BYTECODE_OP_LOAD_FIELD_REF_USER_STRING, |
885 | [ BYTECODE_OP_LOAD_FIELD_REF_USER_SEQUENCE ] = &&LABEL_BYTECODE_OP_LOAD_FIELD_REF_USER_SEQUENCE, | |
3834b99f MD |
886 | |
887 | /* Instructions for recursive traversal through composed types. */ | |
80c2a69a FD |
888 | [ BYTECODE_OP_GET_CONTEXT_ROOT ] = &&LABEL_BYTECODE_OP_GET_CONTEXT_ROOT, |
889 | [ BYTECODE_OP_GET_APP_CONTEXT_ROOT ] = &&LABEL_BYTECODE_OP_GET_APP_CONTEXT_ROOT, | |
890 | [ BYTECODE_OP_GET_PAYLOAD_ROOT ] = &&LABEL_BYTECODE_OP_GET_PAYLOAD_ROOT, | |
891 | ||
892 | [ BYTECODE_OP_GET_SYMBOL ] = &&LABEL_BYTECODE_OP_GET_SYMBOL, | |
893 | [ BYTECODE_OP_GET_SYMBOL_FIELD ] = &&LABEL_BYTECODE_OP_GET_SYMBOL_FIELD, | |
894 | [ BYTECODE_OP_GET_INDEX_U16 ] = &&LABEL_BYTECODE_OP_GET_INDEX_U16, | |
895 | [ BYTECODE_OP_GET_INDEX_U64 ] = &&LABEL_BYTECODE_OP_GET_INDEX_U64, | |
896 | ||
897 | [ BYTECODE_OP_LOAD_FIELD ] = &&LABEL_BYTECODE_OP_LOAD_FIELD, | |
898 | [ BYTECODE_OP_LOAD_FIELD_S8 ] = &&LABEL_BYTECODE_OP_LOAD_FIELD_S8, | |
899 | [ BYTECODE_OP_LOAD_FIELD_S16 ] = &&LABEL_BYTECODE_OP_LOAD_FIELD_S16, | |
900 | [ BYTECODE_OP_LOAD_FIELD_S32 ] = &&LABEL_BYTECODE_OP_LOAD_FIELD_S32, | |
901 | [ BYTECODE_OP_LOAD_FIELD_S64 ] = &&LABEL_BYTECODE_OP_LOAD_FIELD_S64, | |
902 | [ BYTECODE_OP_LOAD_FIELD_U8 ] = &&LABEL_BYTECODE_OP_LOAD_FIELD_U8, | |
903 | [ BYTECODE_OP_LOAD_FIELD_U16 ] = &&LABEL_BYTECODE_OP_LOAD_FIELD_U16, | |
904 | [ BYTECODE_OP_LOAD_FIELD_U32 ] = &&LABEL_BYTECODE_OP_LOAD_FIELD_U32, | |
905 | [ BYTECODE_OP_LOAD_FIELD_U64 ] = &&LABEL_BYTECODE_OP_LOAD_FIELD_U64, | |
906 | [ BYTECODE_OP_LOAD_FIELD_STRING ] = &&LABEL_BYTECODE_OP_LOAD_FIELD_STRING, | |
907 | [ BYTECODE_OP_LOAD_FIELD_SEQUENCE ] = &&LABEL_BYTECODE_OP_LOAD_FIELD_SEQUENCE, | |
908 | [ BYTECODE_OP_LOAD_FIELD_DOUBLE ] = &&LABEL_BYTECODE_OP_LOAD_FIELD_DOUBLE, | |
909 | ||
910 | [ BYTECODE_OP_UNARY_BIT_NOT ] = &&LABEL_BYTECODE_OP_UNARY_BIT_NOT, | |
911 | ||
912 | [ BYTECODE_OP_RETURN_S64 ] = &&LABEL_BYTECODE_OP_RETURN_S64, | |
07dfc1d0 MD |
913 | }; |
914 | #endif /* #ifndef INTERPRETER_USE_SWITCH */ | |
915 | ||
916 | START_OP | |
917 | ||
80c2a69a FD |
918 | OP(BYTECODE_OP_UNKNOWN): |
919 | OP(BYTECODE_OP_LOAD_FIELD_REF): | |
920 | OP(BYTECODE_OP_GET_CONTEXT_REF): | |
07dfc1d0 MD |
921 | #ifdef INTERPRETER_USE_SWITCH |
922 | default: | |
923 | #endif /* INTERPRETER_USE_SWITCH */ | |
80c2a69a FD |
924 | printk(KERN_WARNING "LTTng: bytecode: unknown bytecode op %u\n", |
925 | (unsigned int) *(bytecode_opcode_t *) pc); | |
07dfc1d0 MD |
926 | ret = -EINVAL; |
927 | goto end; | |
928 | ||
80c2a69a | 929 | OP(BYTECODE_OP_RETURN): |
8a445457 | 930 | /* LTTNG_KERNEL_BYTECODE_INTERPRETER_ERROR or LTTNG_KERNEL_BYTECODE_INTERPRETER_OK */ |
d644d1df FD |
931 | switch (estack_ax_t) { |
932 | case REG_S64: | |
1242217a | 933 | case REG_U64: |
d644d1df FD |
934 | retval = !!estack_ax_v; |
935 | break; | |
936 | case REG_DOUBLE: | |
937 | case REG_STRING: | |
938 | case REG_PTR: | |
8a445457 | 939 | if (kernel_bytecode->type != LTTNG_KERNEL_BYTECODE_TYPE_CAPTURE) { |
03cb0cdd FD |
940 | ret = -EINVAL; |
941 | goto end; | |
942 | } | |
943 | retval = 0; | |
944 | break; | |
d644d1df FD |
945 | case REG_STAR_GLOB_STRING: |
946 | case REG_TYPE_UNKNOWN: | |
947 | ret = -EINVAL; | |
948 | goto end; | |
949 | } | |
07dfc1d0 MD |
950 | ret = 0; |
951 | goto end; | |
952 | ||
8a445457 MD |
953 | OP(BYTECODE_OP_RETURN_S64): |
954 | /* LTTNG_KERNEL_BYTECODE_INTERPRETER_ERROR or LTTNG_KERNEL_BYTECODE_INTERPRETER_OK */ | |
955 | retval = !!estack_ax_v; | |
956 | ret = 0; | |
957 | goto end; | |
958 | ||
07dfc1d0 | 959 | /* binary */ |
80c2a69a FD |
960 | OP(BYTECODE_OP_MUL): |
961 | OP(BYTECODE_OP_DIV): | |
962 | OP(BYTECODE_OP_MOD): | |
963 | OP(BYTECODE_OP_PLUS): | |
964 | OP(BYTECODE_OP_MINUS): | |
965 | printk(KERN_WARNING "LTTng: bytecode: unsupported bytecode op %u\n", | |
966 | (unsigned int) *(bytecode_opcode_t *) pc); | |
07dfc1d0 MD |
967 | ret = -EINVAL; |
968 | goto end; | |
969 | ||
80c2a69a FD |
970 | OP(BYTECODE_OP_EQ): |
971 | OP(BYTECODE_OP_NE): | |
972 | OP(BYTECODE_OP_GT): | |
973 | OP(BYTECODE_OP_LT): | |
974 | OP(BYTECODE_OP_GE): | |
975 | OP(BYTECODE_OP_LE): | |
976 | printk(KERN_WARNING "LTTng: bytecode: unsupported non-specialized bytecode op %u\n", | |
977 | (unsigned int) *(bytecode_opcode_t *) pc); | |
07dfc1d0 MD |
978 | ret = -EINVAL; |
979 | goto end; | |
980 | ||
80c2a69a | 981 | OP(BYTECODE_OP_EQ_STRING): |
07dfc1d0 MD |
982 | { |
983 | int res; | |
984 | ||
985 | res = (stack_strcmp(stack, top, "==") == 0); | |
d644d1df | 986 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 987 | estack_ax_v = res; |
d644d1df | 988 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
989 | next_pc += sizeof(struct binary_op); |
990 | PO; | |
991 | } | |
80c2a69a | 992 | OP(BYTECODE_OP_NE_STRING): |
07dfc1d0 MD |
993 | { |
994 | int res; | |
995 | ||
996 | res = (stack_strcmp(stack, top, "!=") != 0); | |
d644d1df | 997 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 998 | estack_ax_v = res; |
d644d1df | 999 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
1000 | next_pc += sizeof(struct binary_op); |
1001 | PO; | |
1002 | } | |
80c2a69a | 1003 | OP(BYTECODE_OP_GT_STRING): |
07dfc1d0 MD |
1004 | { |
1005 | int res; | |
1006 | ||
1007 | res = (stack_strcmp(stack, top, ">") > 0); | |
d644d1df | 1008 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 1009 | estack_ax_v = res; |
d644d1df | 1010 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
1011 | next_pc += sizeof(struct binary_op); |
1012 | PO; | |
1013 | } | |
80c2a69a | 1014 | OP(BYTECODE_OP_LT_STRING): |
07dfc1d0 MD |
1015 | { |
1016 | int res; | |
1017 | ||
1018 | res = (stack_strcmp(stack, top, "<") < 0); | |
d644d1df | 1019 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 1020 | estack_ax_v = res; |
d644d1df | 1021 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
1022 | next_pc += sizeof(struct binary_op); |
1023 | PO; | |
1024 | } | |
80c2a69a | 1025 | OP(BYTECODE_OP_GE_STRING): |
07dfc1d0 MD |
1026 | { |
1027 | int res; | |
1028 | ||
1029 | res = (stack_strcmp(stack, top, ">=") >= 0); | |
d644d1df | 1030 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 1031 | estack_ax_v = res; |
d644d1df | 1032 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
1033 | next_pc += sizeof(struct binary_op); |
1034 | PO; | |
1035 | } | |
80c2a69a | 1036 | OP(BYTECODE_OP_LE_STRING): |
07dfc1d0 MD |
1037 | { |
1038 | int res; | |
1039 | ||
1040 | res = (stack_strcmp(stack, top, "<=") <= 0); | |
d644d1df | 1041 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 1042 | estack_ax_v = res; |
d644d1df | 1043 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
1044 | next_pc += sizeof(struct binary_op); |
1045 | PO; | |
1046 | } | |
1047 | ||
80c2a69a | 1048 | OP(BYTECODE_OP_EQ_STAR_GLOB_STRING): |
02aca193 PP |
1049 | { |
1050 | int res; | |
1051 | ||
1052 | res = (stack_star_glob_match(stack, top, "==") == 0); | |
d644d1df | 1053 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
02aca193 | 1054 | estack_ax_v = res; |
d644d1df | 1055 | estack_ax_t = REG_S64; |
02aca193 PP |
1056 | next_pc += sizeof(struct binary_op); |
1057 | PO; | |
1058 | } | |
80c2a69a | 1059 | OP(BYTECODE_OP_NE_STAR_GLOB_STRING): |
02aca193 PP |
1060 | { |
1061 | int res; | |
1062 | ||
1063 | res = (stack_star_glob_match(stack, top, "!=") != 0); | |
d644d1df | 1064 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
02aca193 | 1065 | estack_ax_v = res; |
d644d1df | 1066 | estack_ax_t = REG_S64; |
02aca193 PP |
1067 | next_pc += sizeof(struct binary_op); |
1068 | PO; | |
1069 | } | |
1070 | ||
80c2a69a | 1071 | OP(BYTECODE_OP_EQ_S64): |
07dfc1d0 MD |
1072 | { |
1073 | int res; | |
1074 | ||
1075 | res = (estack_bx_v == estack_ax_v); | |
d644d1df | 1076 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 1077 | estack_ax_v = res; |
d644d1df | 1078 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
1079 | next_pc += sizeof(struct binary_op); |
1080 | PO; | |
1081 | } | |
80c2a69a | 1082 | OP(BYTECODE_OP_NE_S64): |
07dfc1d0 MD |
1083 | { |
1084 | int res; | |
1085 | ||
1086 | res = (estack_bx_v != estack_ax_v); | |
d644d1df | 1087 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 1088 | estack_ax_v = res; |
d644d1df | 1089 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
1090 | next_pc += sizeof(struct binary_op); |
1091 | PO; | |
1092 | } | |
80c2a69a | 1093 | OP(BYTECODE_OP_GT_S64): |
07dfc1d0 MD |
1094 | { |
1095 | int res; | |
1096 | ||
1097 | res = (estack_bx_v > estack_ax_v); | |
d644d1df | 1098 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 1099 | estack_ax_v = res; |
d644d1df | 1100 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
1101 | next_pc += sizeof(struct binary_op); |
1102 | PO; | |
1103 | } | |
80c2a69a | 1104 | OP(BYTECODE_OP_LT_S64): |
07dfc1d0 MD |
1105 | { |
1106 | int res; | |
1107 | ||
1108 | res = (estack_bx_v < estack_ax_v); | |
d644d1df | 1109 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 1110 | estack_ax_v = res; |
d644d1df | 1111 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
1112 | next_pc += sizeof(struct binary_op); |
1113 | PO; | |
1114 | } | |
80c2a69a | 1115 | OP(BYTECODE_OP_GE_S64): |
07dfc1d0 MD |
1116 | { |
1117 | int res; | |
1118 | ||
1119 | res = (estack_bx_v >= estack_ax_v); | |
d644d1df | 1120 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 1121 | estack_ax_v = res; |
d644d1df | 1122 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
1123 | next_pc += sizeof(struct binary_op); |
1124 | PO; | |
1125 | } | |
80c2a69a | 1126 | OP(BYTECODE_OP_LE_S64): |
07dfc1d0 MD |
1127 | { |
1128 | int res; | |
1129 | ||
1130 | res = (estack_bx_v <= estack_ax_v); | |
d644d1df | 1131 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 1132 | estack_ax_v = res; |
d644d1df | 1133 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
1134 | next_pc += sizeof(struct binary_op); |
1135 | PO; | |
1136 | } | |
1137 | ||
80c2a69a FD |
1138 | OP(BYTECODE_OP_EQ_DOUBLE): |
1139 | OP(BYTECODE_OP_NE_DOUBLE): | |
1140 | OP(BYTECODE_OP_GT_DOUBLE): | |
1141 | OP(BYTECODE_OP_LT_DOUBLE): | |
1142 | OP(BYTECODE_OP_GE_DOUBLE): | |
1143 | OP(BYTECODE_OP_LE_DOUBLE): | |
07dfc1d0 MD |
1144 | { |
1145 | BUG_ON(1); | |
1146 | PO; | |
1147 | } | |
1148 | ||
1149 | /* Mixed S64-double binary comparators */ | |
80c2a69a FD |
1150 | OP(BYTECODE_OP_EQ_DOUBLE_S64): |
1151 | OP(BYTECODE_OP_NE_DOUBLE_S64): | |
1152 | OP(BYTECODE_OP_GT_DOUBLE_S64): | |
1153 | OP(BYTECODE_OP_LT_DOUBLE_S64): | |
1154 | OP(BYTECODE_OP_GE_DOUBLE_S64): | |
1155 | OP(BYTECODE_OP_LE_DOUBLE_S64): | |
1156 | OP(BYTECODE_OP_EQ_S64_DOUBLE): | |
1157 | OP(BYTECODE_OP_NE_S64_DOUBLE): | |
1158 | OP(BYTECODE_OP_GT_S64_DOUBLE): | |
1159 | OP(BYTECODE_OP_LT_S64_DOUBLE): | |
1160 | OP(BYTECODE_OP_GE_S64_DOUBLE): | |
1161 | OP(BYTECODE_OP_LE_S64_DOUBLE): | |
07dfc1d0 MD |
1162 | { |
1163 | BUG_ON(1); | |
1164 | PO; | |
1165 | } | |
80c2a69a | 1166 | OP(BYTECODE_OP_BIT_RSHIFT): |
e16c054b MD |
1167 | { |
1168 | int64_t res; | |
1169 | ||
d644d1df FD |
1170 | if (!IS_INTEGER_REGISTER(estack_ax_t) || !IS_INTEGER_REGISTER(estack_bx_t)) { |
1171 | ret = -EINVAL; | |
1172 | goto end; | |
1173 | } | |
1174 | ||
ea13ec96 MD |
1175 | /* Catch undefined behavior. */ |
1176 | if (unlikely(estack_ax_v < 0 || estack_ax_v >= 64)) { | |
1177 | ret = -EINVAL; | |
1178 | goto end; | |
1179 | } | |
f8d42740 | 1180 | res = ((uint64_t) estack_bx_v >> (uint32_t) estack_ax_v); |
d644d1df | 1181 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
e16c054b | 1182 | estack_ax_v = res; |
1242217a | 1183 | estack_ax_t = REG_U64; |
e16c054b MD |
1184 | next_pc += sizeof(struct binary_op); |
1185 | PO; | |
1186 | } | |
80c2a69a | 1187 | OP(BYTECODE_OP_BIT_LSHIFT): |
e16c054b MD |
1188 | { |
1189 | int64_t res; | |
1190 | ||
d644d1df FD |
1191 | if (!IS_INTEGER_REGISTER(estack_ax_t) || !IS_INTEGER_REGISTER(estack_bx_t)) { |
1192 | ret = -EINVAL; | |
1193 | goto end; | |
1194 | } | |
1195 | ||
ea13ec96 MD |
1196 | /* Catch undefined behavior. */ |
1197 | if (unlikely(estack_ax_v < 0 || estack_ax_v >= 64)) { | |
1198 | ret = -EINVAL; | |
1199 | goto end; | |
1200 | } | |
f8d42740 | 1201 | res = ((uint64_t) estack_bx_v << (uint32_t) estack_ax_v); |
d644d1df | 1202 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
e16c054b | 1203 | estack_ax_v = res; |
1242217a | 1204 | estack_ax_t = REG_U64; |
e16c054b MD |
1205 | next_pc += sizeof(struct binary_op); |
1206 | PO; | |
1207 | } | |
80c2a69a | 1208 | OP(BYTECODE_OP_BIT_AND): |
3834b99f MD |
1209 | { |
1210 | int64_t res; | |
1211 | ||
d644d1df FD |
1212 | if (!IS_INTEGER_REGISTER(estack_ax_t) || !IS_INTEGER_REGISTER(estack_bx_t)) { |
1213 | ret = -EINVAL; | |
1214 | goto end; | |
1215 | } | |
1216 | ||
f8d42740 | 1217 | res = ((uint64_t) estack_bx_v & (uint64_t) estack_ax_v); |
d644d1df | 1218 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
3834b99f | 1219 | estack_ax_v = res; |
1242217a | 1220 | estack_ax_t = REG_U64; |
3834b99f MD |
1221 | next_pc += sizeof(struct binary_op); |
1222 | PO; | |
1223 | } | |
80c2a69a | 1224 | OP(BYTECODE_OP_BIT_OR): |
3834b99f MD |
1225 | { |
1226 | int64_t res; | |
1227 | ||
d644d1df FD |
1228 | if (!IS_INTEGER_REGISTER(estack_ax_t) || !IS_INTEGER_REGISTER(estack_bx_t)) { |
1229 | ret = -EINVAL; | |
1230 | goto end; | |
1231 | } | |
1232 | ||
f8d42740 | 1233 | res = ((uint64_t) estack_bx_v | (uint64_t) estack_ax_v); |
d644d1df | 1234 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
3834b99f | 1235 | estack_ax_v = res; |
1242217a | 1236 | estack_ax_t = REG_U64; |
3834b99f MD |
1237 | next_pc += sizeof(struct binary_op); |
1238 | PO; | |
1239 | } | |
80c2a69a | 1240 | OP(BYTECODE_OP_BIT_XOR): |
3834b99f MD |
1241 | { |
1242 | int64_t res; | |
1243 | ||
d644d1df FD |
1244 | if (!IS_INTEGER_REGISTER(estack_ax_t) || !IS_INTEGER_REGISTER(estack_bx_t)) { |
1245 | ret = -EINVAL; | |
1246 | goto end; | |
1247 | } | |
1248 | ||
f8d42740 | 1249 | res = ((uint64_t) estack_bx_v ^ (uint64_t) estack_ax_v); |
d644d1df | 1250 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
3834b99f | 1251 | estack_ax_v = res; |
1242217a | 1252 | estack_ax_t = REG_U64; |
3834b99f MD |
1253 | next_pc += sizeof(struct binary_op); |
1254 | PO; | |
1255 | } | |
07dfc1d0 MD |
1256 | |
1257 | /* unary */ | |
80c2a69a FD |
1258 | OP(BYTECODE_OP_UNARY_PLUS): |
1259 | OP(BYTECODE_OP_UNARY_MINUS): | |
1260 | OP(BYTECODE_OP_UNARY_NOT): | |
1261 | printk(KERN_WARNING "LTTng: bytecode: unsupported non-specialized bytecode op %u\n", | |
1262 | (unsigned int) *(bytecode_opcode_t *) pc); | |
07dfc1d0 MD |
1263 | ret = -EINVAL; |
1264 | goto end; | |
1265 | ||
1266 | ||
80c2a69a | 1267 | OP(BYTECODE_OP_UNARY_BIT_NOT): |
e16c054b | 1268 | { |
f8d42740 | 1269 | estack_ax_v = ~(uint64_t) estack_ax_v; |
d644d1df | 1270 | estack_ax_t = REG_S64; |
e16c054b MD |
1271 | next_pc += sizeof(struct unary_op); |
1272 | PO; | |
1273 | } | |
1274 | ||
80c2a69a | 1275 | OP(BYTECODE_OP_UNARY_PLUS_S64): |
07dfc1d0 MD |
1276 | { |
1277 | next_pc += sizeof(struct unary_op); | |
1278 | PO; | |
1279 | } | |
80c2a69a | 1280 | OP(BYTECODE_OP_UNARY_MINUS_S64): |
07dfc1d0 MD |
1281 | { |
1282 | estack_ax_v = -estack_ax_v; | |
d644d1df | 1283 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
1284 | next_pc += sizeof(struct unary_op); |
1285 | PO; | |
1286 | } | |
80c2a69a FD |
1287 | OP(BYTECODE_OP_UNARY_PLUS_DOUBLE): |
1288 | OP(BYTECODE_OP_UNARY_MINUS_DOUBLE): | |
07dfc1d0 MD |
1289 | { |
1290 | BUG_ON(1); | |
1291 | PO; | |
1292 | } | |
80c2a69a | 1293 | OP(BYTECODE_OP_UNARY_NOT_S64): |
07dfc1d0 MD |
1294 | { |
1295 | estack_ax_v = !estack_ax_v; | |
d644d1df | 1296 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
1297 | next_pc += sizeof(struct unary_op); |
1298 | PO; | |
1299 | } | |
80c2a69a | 1300 | OP(BYTECODE_OP_UNARY_NOT_DOUBLE): |
07dfc1d0 MD |
1301 | { |
1302 | BUG_ON(1); | |
1303 | PO; | |
1304 | } | |
1305 | ||
1306 | /* logical */ | |
80c2a69a | 1307 | OP(BYTECODE_OP_AND): |
07dfc1d0 MD |
1308 | { |
1309 | struct logical_op *insn = (struct logical_op *) pc; | |
1310 | ||
1311 | /* If AX is 0, skip and evaluate to 0 */ | |
1312 | if (unlikely(estack_ax_v == 0)) { | |
1313 | dbg_printk("Jumping to bytecode offset %u\n", | |
1314 | (unsigned int) insn->skip_offset); | |
1315 | next_pc = start_pc + insn->skip_offset; | |
1316 | } else { | |
1317 | /* Pop 1 when jump not taken */ | |
d644d1df | 1318 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 MD |
1319 | next_pc += sizeof(struct logical_op); |
1320 | } | |
1321 | PO; | |
1322 | } | |
80c2a69a | 1323 | OP(BYTECODE_OP_OR): |
07dfc1d0 MD |
1324 | { |
1325 | struct logical_op *insn = (struct logical_op *) pc; | |
1326 | ||
1327 | /* If AX is nonzero, skip and evaluate to 1 */ | |
1328 | ||
1329 | if (unlikely(estack_ax_v != 0)) { | |
1330 | estack_ax_v = 1; | |
1331 | dbg_printk("Jumping to bytecode offset %u\n", | |
1332 | (unsigned int) insn->skip_offset); | |
1333 | next_pc = start_pc + insn->skip_offset; | |
1334 | } else { | |
1335 | /* Pop 1 when jump not taken */ | |
d644d1df | 1336 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 MD |
1337 | next_pc += sizeof(struct logical_op); |
1338 | } | |
1339 | PO; | |
1340 | } | |
1341 | ||
1342 | ||
1343 | /* load field ref */ | |
80c2a69a | 1344 | OP(BYTECODE_OP_LOAD_FIELD_REF_STRING): |
07dfc1d0 MD |
1345 | { |
1346 | struct load_op *insn = (struct load_op *) pc; | |
1347 | struct field_ref *ref = (struct field_ref *) insn->data; | |
1348 | ||
1349 | dbg_printk("load field ref offset %u type string\n", | |
1350 | ref->offset); | |
d644d1df | 1351 | estack_push(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 1352 | estack_ax(stack, top)->u.s.str = |
03cb0cdd | 1353 | *(const char * const *) &interpreter_stack_data[ref->offset]; |
07dfc1d0 | 1354 | if (unlikely(!estack_ax(stack, top)->u.s.str)) { |
80c2a69a | 1355 | dbg_printk("Bytecode warning: loading a NULL string.\n"); |
07dfc1d0 MD |
1356 | ret = -EINVAL; |
1357 | goto end; | |
1358 | } | |
cbc19040 | 1359 | estack_ax(stack, top)->u.s.seq_len = LTTNG_SIZE_MAX; |
02aca193 PP |
1360 | estack_ax(stack, top)->u.s.literal_type = |
1361 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
f127e61e | 1362 | estack_ax(stack, top)->u.s.user = 0; |
d644d1df | 1363 | estack_ax(stack, top)->type = REG_STRING; |
07dfc1d0 MD |
1364 | dbg_printk("ref load string %s\n", estack_ax(stack, top)->u.s.str); |
1365 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
1366 | PO; | |
1367 | } | |
1368 | ||
80c2a69a | 1369 | OP(BYTECODE_OP_LOAD_FIELD_REF_SEQUENCE): |
07dfc1d0 MD |
1370 | { |
1371 | struct load_op *insn = (struct load_op *) pc; | |
1372 | struct field_ref *ref = (struct field_ref *) insn->data; | |
1373 | ||
1374 | dbg_printk("load field ref offset %u type sequence\n", | |
1375 | ref->offset); | |
d644d1df | 1376 | estack_push(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 1377 | estack_ax(stack, top)->u.s.seq_len = |
03cb0cdd | 1378 | *(unsigned long *) &interpreter_stack_data[ref->offset]; |
07dfc1d0 | 1379 | estack_ax(stack, top)->u.s.str = |
03cb0cdd | 1380 | *(const char **) (&interpreter_stack_data[ref->offset |
07dfc1d0 MD |
1381 | + sizeof(unsigned long)]); |
1382 | if (unlikely(!estack_ax(stack, top)->u.s.str)) { | |
80c2a69a | 1383 | dbg_printk("Bytecode warning: loading a NULL sequence.\n"); |
07dfc1d0 MD |
1384 | ret = -EINVAL; |
1385 | goto end; | |
1386 | } | |
02aca193 PP |
1387 | estack_ax(stack, top)->u.s.literal_type = |
1388 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
f127e61e | 1389 | estack_ax(stack, top)->u.s.user = 0; |
07dfc1d0 MD |
1390 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); |
1391 | PO; | |
1392 | } | |
1393 | ||
80c2a69a | 1394 | OP(BYTECODE_OP_LOAD_FIELD_REF_S64): |
07dfc1d0 MD |
1395 | { |
1396 | struct load_op *insn = (struct load_op *) pc; | |
1397 | struct field_ref *ref = (struct field_ref *) insn->data; | |
1398 | ||
1399 | dbg_printk("load field ref offset %u type s64\n", | |
1400 | ref->offset); | |
d644d1df | 1401 | estack_push(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 1402 | estack_ax_v = |
03cb0cdd | 1403 | ((struct literal_numeric *) &interpreter_stack_data[ref->offset])->v; |
d644d1df | 1404 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
1405 | dbg_printk("ref load s64 %lld\n", |
1406 | (long long) estack_ax_v); | |
1407 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
1408 | PO; | |
1409 | } | |
1410 | ||
80c2a69a | 1411 | OP(BYTECODE_OP_LOAD_FIELD_REF_DOUBLE): |
07dfc1d0 MD |
1412 | { |
1413 | BUG_ON(1); | |
1414 | PO; | |
1415 | } | |
1416 | ||
1417 | /* load from immediate operand */ | |
80c2a69a | 1418 | OP(BYTECODE_OP_LOAD_STRING): |
07dfc1d0 MD |
1419 | { |
1420 | struct load_op *insn = (struct load_op *) pc; | |
1421 | ||
1422 | dbg_printk("load string %s\n", insn->data); | |
d644d1df | 1423 | estack_push(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 1424 | estack_ax(stack, top)->u.s.str = insn->data; |
cbc19040 | 1425 | estack_ax(stack, top)->u.s.seq_len = LTTNG_SIZE_MAX; |
02aca193 PP |
1426 | estack_ax(stack, top)->u.s.literal_type = |
1427 | ESTACK_STRING_LITERAL_TYPE_PLAIN; | |
1428 | estack_ax(stack, top)->u.s.user = 0; | |
1429 | next_pc += sizeof(struct load_op) + strlen(insn->data) + 1; | |
1430 | PO; | |
1431 | } | |
1432 | ||
80c2a69a | 1433 | OP(BYTECODE_OP_LOAD_STAR_GLOB_STRING): |
02aca193 PP |
1434 | { |
1435 | struct load_op *insn = (struct load_op *) pc; | |
1436 | ||
1437 | dbg_printk("load globbing pattern %s\n", insn->data); | |
d644d1df | 1438 | estack_push(stack, top, ax, bx, ax_t, bx_t); |
02aca193 | 1439 | estack_ax(stack, top)->u.s.str = insn->data; |
cbc19040 | 1440 | estack_ax(stack, top)->u.s.seq_len = LTTNG_SIZE_MAX; |
02aca193 PP |
1441 | estack_ax(stack, top)->u.s.literal_type = |
1442 | ESTACK_STRING_LITERAL_TYPE_STAR_GLOB; | |
f127e61e | 1443 | estack_ax(stack, top)->u.s.user = 0; |
07dfc1d0 MD |
1444 | next_pc += sizeof(struct load_op) + strlen(insn->data) + 1; |
1445 | PO; | |
1446 | } | |
1447 | ||
80c2a69a | 1448 | OP(BYTECODE_OP_LOAD_S64): |
07dfc1d0 MD |
1449 | { |
1450 | struct load_op *insn = (struct load_op *) pc; | |
1451 | ||
d644d1df | 1452 | estack_push(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 1453 | estack_ax_v = ((struct literal_numeric *) insn->data)->v; |
d644d1df | 1454 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
1455 | dbg_printk("load s64 %lld\n", |
1456 | (long long) estack_ax_v); | |
1457 | next_pc += sizeof(struct load_op) | |
1458 | + sizeof(struct literal_numeric); | |
1459 | PO; | |
1460 | } | |
1461 | ||
80c2a69a | 1462 | OP(BYTECODE_OP_LOAD_DOUBLE): |
07dfc1d0 MD |
1463 | { |
1464 | BUG_ON(1); | |
1465 | PO; | |
1466 | } | |
1467 | ||
1468 | /* cast */ | |
80c2a69a FD |
1469 | OP(BYTECODE_OP_CAST_TO_S64): |
1470 | printk(KERN_WARNING "LTTng: bytecode: unsupported non-specialized bytecode op %u\n", | |
1471 | (unsigned int) *(bytecode_opcode_t *) pc); | |
07dfc1d0 MD |
1472 | ret = -EINVAL; |
1473 | goto end; | |
1474 | ||
80c2a69a | 1475 | OP(BYTECODE_OP_CAST_DOUBLE_TO_S64): |
07dfc1d0 MD |
1476 | { |
1477 | BUG_ON(1); | |
1478 | PO; | |
1479 | } | |
1480 | ||
80c2a69a | 1481 | OP(BYTECODE_OP_CAST_NOP): |
07dfc1d0 MD |
1482 | { |
1483 | next_pc += sizeof(struct cast_op); | |
1484 | PO; | |
1485 | } | |
1486 | ||
1487 | /* get context ref */ | |
80c2a69a | 1488 | OP(BYTECODE_OP_GET_CONTEXT_REF_STRING): |
07dfc1d0 MD |
1489 | { |
1490 | struct load_op *insn = (struct load_op *) pc; | |
1491 | struct field_ref *ref = (struct field_ref *) insn->data; | |
437d5aa5 | 1492 | struct lttng_kernel_ctx_field *ctx_field; |
2dc781e0 | 1493 | struct lttng_ctx_value v; |
07dfc1d0 MD |
1494 | |
1495 | dbg_printk("get context ref offset %u type string\n", | |
1496 | ref->offset); | |
1497 | ctx_field = <tng_static_ctx->fields[ref->offset]; | |
2dc781e0 | 1498 | ctx_field->get_value(ctx_field->priv, lttng_probe_ctx, &v); |
d644d1df | 1499 | estack_push(stack, top, ax, bx, ax_t, bx_t); |
2dc781e0 | 1500 | estack_ax(stack, top)->u.s.str = v.u.str; |
07dfc1d0 | 1501 | if (unlikely(!estack_ax(stack, top)->u.s.str)) { |
80c2a69a | 1502 | dbg_printk("Bytecode warning: loading a NULL string.\n"); |
07dfc1d0 MD |
1503 | ret = -EINVAL; |
1504 | goto end; | |
1505 | } | |
cbc19040 | 1506 | estack_ax(stack, top)->u.s.seq_len = LTTNG_SIZE_MAX; |
02aca193 PP |
1507 | estack_ax(stack, top)->u.s.literal_type = |
1508 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
f127e61e | 1509 | estack_ax(stack, top)->u.s.user = 0; |
d644d1df | 1510 | estack_ax(stack, top)->type = REG_STRING; |
07dfc1d0 MD |
1511 | dbg_printk("ref get context string %s\n", estack_ax(stack, top)->u.s.str); |
1512 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
1513 | PO; | |
1514 | } | |
1515 | ||
80c2a69a | 1516 | OP(BYTECODE_OP_GET_CONTEXT_REF_S64): |
07dfc1d0 MD |
1517 | { |
1518 | struct load_op *insn = (struct load_op *) pc; | |
1519 | struct field_ref *ref = (struct field_ref *) insn->data; | |
437d5aa5 | 1520 | struct lttng_kernel_ctx_field *ctx_field; |
2dc781e0 | 1521 | struct lttng_ctx_value v; |
07dfc1d0 MD |
1522 | |
1523 | dbg_printk("get context ref offset %u type s64\n", | |
1524 | ref->offset); | |
1525 | ctx_field = <tng_static_ctx->fields[ref->offset]; | |
2dc781e0 | 1526 | ctx_field->get_value(ctx_field->priv, lttng_probe_ctx, &v); |
d644d1df | 1527 | estack_push(stack, top, ax, bx, ax_t, bx_t); |
2dc781e0 | 1528 | estack_ax_v = v.u.s64; |
d644d1df | 1529 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
1530 | dbg_printk("ref get context s64 %lld\n", |
1531 | (long long) estack_ax_v); | |
1532 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
1533 | PO; | |
1534 | } | |
1535 | ||
80c2a69a | 1536 | OP(BYTECODE_OP_GET_CONTEXT_REF_DOUBLE): |
07dfc1d0 MD |
1537 | { |
1538 | BUG_ON(1); | |
1539 | PO; | |
1540 | } | |
1541 | ||
f127e61e | 1542 | /* load userspace field ref */ |
80c2a69a | 1543 | OP(BYTECODE_OP_LOAD_FIELD_REF_USER_STRING): |
f127e61e MD |
1544 | { |
1545 | struct load_op *insn = (struct load_op *) pc; | |
1546 | struct field_ref *ref = (struct field_ref *) insn->data; | |
1547 | ||
1548 | dbg_printk("load field ref offset %u type user string\n", | |
1549 | ref->offset); | |
d644d1df | 1550 | estack_push(stack, top, ax, bx, ax_t, bx_t); |
5b4ad89f | 1551 | estack_ax(stack, top)->u.s.user_str = |
03cb0cdd | 1552 | *(const char * const *) &interpreter_stack_data[ref->offset]; |
acbe9250 | 1553 | if (unlikely(!estack_ax(stack, top)->u.s.user_str)) { |
80c2a69a | 1554 | dbg_printk("Bytecode warning: loading a NULL string.\n"); |
f127e61e MD |
1555 | ret = -EINVAL; |
1556 | goto end; | |
1557 | } | |
cbc19040 | 1558 | estack_ax(stack, top)->u.s.seq_len = LTTNG_SIZE_MAX; |
02aca193 PP |
1559 | estack_ax(stack, top)->u.s.literal_type = |
1560 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
f127e61e | 1561 | estack_ax(stack, top)->u.s.user = 1; |
d644d1df | 1562 | estack_ax(stack, top)->type = REG_STRING; |
acbe9250 | 1563 | dbg_load_ref_user_str_printk(estack_ax(stack, top)); |
f127e61e MD |
1564 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); |
1565 | PO; | |
1566 | } | |
1567 | ||
80c2a69a | 1568 | OP(BYTECODE_OP_LOAD_FIELD_REF_USER_SEQUENCE): |
f127e61e MD |
1569 | { |
1570 | struct load_op *insn = (struct load_op *) pc; | |
1571 | struct field_ref *ref = (struct field_ref *) insn->data; | |
1572 | ||
1573 | dbg_printk("load field ref offset %u type user sequence\n", | |
1574 | ref->offset); | |
d644d1df | 1575 | estack_push(stack, top, ax, bx, ax_t, bx_t); |
f127e61e | 1576 | estack_ax(stack, top)->u.s.seq_len = |
03cb0cdd | 1577 | *(unsigned long *) &interpreter_stack_data[ref->offset]; |
5b4ad89f | 1578 | estack_ax(stack, top)->u.s.user_str = |
03cb0cdd | 1579 | *(const char **) (&interpreter_stack_data[ref->offset |
f127e61e | 1580 | + sizeof(unsigned long)]); |
acbe9250 | 1581 | if (unlikely(!estack_ax(stack, top)->u.s.user_str)) { |
80c2a69a | 1582 | dbg_printk("Bytecode warning: loading a NULL sequence.\n"); |
f127e61e MD |
1583 | ret = -EINVAL; |
1584 | goto end; | |
1585 | } | |
02aca193 PP |
1586 | estack_ax(stack, top)->u.s.literal_type = |
1587 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
f127e61e MD |
1588 | estack_ax(stack, top)->u.s.user = 1; |
1589 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
1590 | PO; | |
1591 | } | |
1592 | ||
80c2a69a | 1593 | OP(BYTECODE_OP_GET_CONTEXT_ROOT): |
3834b99f MD |
1594 | { |
1595 | dbg_printk("op get context root\n"); | |
d644d1df | 1596 | estack_push(stack, top, ax, bx, ax_t, bx_t); |
3834b99f MD |
1597 | estack_ax(stack, top)->u.ptr.type = LOAD_ROOT_CONTEXT; |
1598 | /* "field" only needed for variants. */ | |
1599 | estack_ax(stack, top)->u.ptr.field = NULL; | |
d644d1df | 1600 | estack_ax(stack, top)->type = REG_PTR; |
3834b99f MD |
1601 | next_pc += sizeof(struct load_op); |
1602 | PO; | |
1603 | } | |
1604 | ||
80c2a69a | 1605 | OP(BYTECODE_OP_GET_APP_CONTEXT_ROOT): |
3834b99f MD |
1606 | { |
1607 | BUG_ON(1); | |
1608 | PO; | |
1609 | } | |
1610 | ||
80c2a69a | 1611 | OP(BYTECODE_OP_GET_PAYLOAD_ROOT): |
3834b99f MD |
1612 | { |
1613 | dbg_printk("op get app payload root\n"); | |
d644d1df | 1614 | estack_push(stack, top, ax, bx, ax_t, bx_t); |
3834b99f | 1615 | estack_ax(stack, top)->u.ptr.type = LOAD_ROOT_PAYLOAD; |
03cb0cdd | 1616 | estack_ax(stack, top)->u.ptr.ptr = interpreter_stack_data; |
3834b99f MD |
1617 | /* "field" only needed for variants. */ |
1618 | estack_ax(stack, top)->u.ptr.field = NULL; | |
d644d1df | 1619 | estack_ax(stack, top)->type = REG_PTR; |
3834b99f MD |
1620 | next_pc += sizeof(struct load_op); |
1621 | PO; | |
1622 | } | |
1623 | ||
80c2a69a | 1624 | OP(BYTECODE_OP_GET_SYMBOL): |
3834b99f MD |
1625 | { |
1626 | dbg_printk("op get symbol\n"); | |
1627 | switch (estack_ax(stack, top)->u.ptr.type) { | |
1628 | case LOAD_OBJECT: | |
80c2a69a | 1629 | printk(KERN_WARNING "LTTng: bytecode: Nested fields not implemented yet.\n"); |
3834b99f MD |
1630 | ret = -EINVAL; |
1631 | goto end; | |
1632 | case LOAD_ROOT_CONTEXT: | |
1633 | case LOAD_ROOT_APP_CONTEXT: | |
1634 | case LOAD_ROOT_PAYLOAD: | |
1635 | /* | |
1636 | * symbol lookup is performed by | |
1637 | * specialization. | |
1638 | */ | |
1639 | ret = -EINVAL; | |
1640 | goto end; | |
1641 | } | |
1642 | next_pc += sizeof(struct load_op) + sizeof(struct get_symbol); | |
1643 | PO; | |
1644 | } | |
1645 | ||
80c2a69a | 1646 | OP(BYTECODE_OP_GET_SYMBOL_FIELD): |
3834b99f MD |
1647 | { |
1648 | /* | |
1649 | * Used for first variant encountered in a | |
1650 | * traversal. Variants are not implemented yet. | |
1651 | */ | |
1652 | ret = -EINVAL; | |
1653 | goto end; | |
1654 | } | |
1655 | ||
80c2a69a | 1656 | OP(BYTECODE_OP_GET_INDEX_U16): |
3834b99f MD |
1657 | { |
1658 | struct load_op *insn = (struct load_op *) pc; | |
1659 | struct get_index_u16 *index = (struct get_index_u16 *) insn->data; | |
1660 | ||
1661 | dbg_printk("op get index u16\n"); | |
1662 | ret = dynamic_get_index(lttng_probe_ctx, bytecode, index->index, estack_ax(stack, top)); | |
1663 | if (ret) | |
1664 | goto end; | |
1665 | estack_ax_v = estack_ax(stack, top)->u.v; | |
d644d1df | 1666 | estack_ax_t = estack_ax(stack, top)->type; |
3834b99f MD |
1667 | next_pc += sizeof(struct load_op) + sizeof(struct get_index_u16); |
1668 | PO; | |
1669 | } | |
1670 | ||
80c2a69a | 1671 | OP(BYTECODE_OP_GET_INDEX_U64): |
3834b99f MD |
1672 | { |
1673 | struct load_op *insn = (struct load_op *) pc; | |
1674 | struct get_index_u64 *index = (struct get_index_u64 *) insn->data; | |
1675 | ||
1676 | dbg_printk("op get index u64\n"); | |
1677 | ret = dynamic_get_index(lttng_probe_ctx, bytecode, index->index, estack_ax(stack, top)); | |
1678 | if (ret) | |
1679 | goto end; | |
1680 | estack_ax_v = estack_ax(stack, top)->u.v; | |
d644d1df | 1681 | estack_ax_t = estack_ax(stack, top)->type; |
3834b99f MD |
1682 | next_pc += sizeof(struct load_op) + sizeof(struct get_index_u64); |
1683 | PO; | |
1684 | } | |
1685 | ||
80c2a69a | 1686 | OP(BYTECODE_OP_LOAD_FIELD): |
3834b99f MD |
1687 | { |
1688 | dbg_printk("op load field\n"); | |
1689 | ret = dynamic_load_field(estack_ax(stack, top)); | |
1690 | if (ret) | |
1691 | goto end; | |
1692 | estack_ax_v = estack_ax(stack, top)->u.v; | |
d644d1df | 1693 | estack_ax_t = estack_ax(stack, top)->type; |
3834b99f MD |
1694 | next_pc += sizeof(struct load_op); |
1695 | PO; | |
1696 | } | |
1697 | ||
80c2a69a | 1698 | OP(BYTECODE_OP_LOAD_FIELD_S8): |
3834b99f MD |
1699 | { |
1700 | dbg_printk("op load field s8\n"); | |
1701 | ||
1702 | estack_ax_v = *(int8_t *) estack_ax(stack, top)->u.ptr.ptr; | |
d644d1df | 1703 | estack_ax_t = REG_S64; |
3834b99f MD |
1704 | next_pc += sizeof(struct load_op); |
1705 | PO; | |
1706 | } | |
80c2a69a | 1707 | OP(BYTECODE_OP_LOAD_FIELD_S16): |
3834b99f MD |
1708 | { |
1709 | dbg_printk("op load field s16\n"); | |
1710 | ||
1711 | estack_ax_v = *(int16_t *) estack_ax(stack, top)->u.ptr.ptr; | |
d644d1df | 1712 | estack_ax_t = REG_S64; |
3834b99f MD |
1713 | next_pc += sizeof(struct load_op); |
1714 | PO; | |
1715 | } | |
80c2a69a | 1716 | OP(BYTECODE_OP_LOAD_FIELD_S32): |
3834b99f MD |
1717 | { |
1718 | dbg_printk("op load field s32\n"); | |
1719 | ||
1720 | estack_ax_v = *(int32_t *) estack_ax(stack, top)->u.ptr.ptr; | |
d644d1df | 1721 | estack_ax_t = REG_S64; |
3834b99f MD |
1722 | next_pc += sizeof(struct load_op); |
1723 | PO; | |
1724 | } | |
80c2a69a | 1725 | OP(BYTECODE_OP_LOAD_FIELD_S64): |
3834b99f MD |
1726 | { |
1727 | dbg_printk("op load field s64\n"); | |
1728 | ||
1729 | estack_ax_v = *(int64_t *) estack_ax(stack, top)->u.ptr.ptr; | |
d644d1df | 1730 | estack_ax_t = REG_S64; |
3834b99f MD |
1731 | next_pc += sizeof(struct load_op); |
1732 | PO; | |
1733 | } | |
80c2a69a | 1734 | OP(BYTECODE_OP_LOAD_FIELD_U8): |
3834b99f MD |
1735 | { |
1736 | dbg_printk("op load field u8\n"); | |
1737 | ||
1738 | estack_ax_v = *(uint8_t *) estack_ax(stack, top)->u.ptr.ptr; | |
d644d1df | 1739 | estack_ax_t = REG_S64; |
3834b99f MD |
1740 | next_pc += sizeof(struct load_op); |
1741 | PO; | |
1742 | } | |
80c2a69a | 1743 | OP(BYTECODE_OP_LOAD_FIELD_U16): |
3834b99f MD |
1744 | { |
1745 | dbg_printk("op load field u16\n"); | |
1746 | ||
1747 | estack_ax_v = *(uint16_t *) estack_ax(stack, top)->u.ptr.ptr; | |
d644d1df | 1748 | estack_ax_t = REG_S64; |
3834b99f MD |
1749 | next_pc += sizeof(struct load_op); |
1750 | PO; | |
1751 | } | |
80c2a69a | 1752 | OP(BYTECODE_OP_LOAD_FIELD_U32): |
3834b99f MD |
1753 | { |
1754 | dbg_printk("op load field u32\n"); | |
1755 | ||
1756 | estack_ax_v = *(uint32_t *) estack_ax(stack, top)->u.ptr.ptr; | |
d644d1df | 1757 | estack_ax_t = REG_S64; |
3834b99f MD |
1758 | next_pc += sizeof(struct load_op); |
1759 | PO; | |
1760 | } | |
80c2a69a | 1761 | OP(BYTECODE_OP_LOAD_FIELD_U64): |
3834b99f MD |
1762 | { |
1763 | dbg_printk("op load field u64\n"); | |
1764 | ||
1765 | estack_ax_v = *(uint64_t *) estack_ax(stack, top)->u.ptr.ptr; | |
d644d1df | 1766 | estack_ax_t = REG_S64; |
3834b99f MD |
1767 | next_pc += sizeof(struct load_op); |
1768 | PO; | |
1769 | } | |
80c2a69a | 1770 | OP(BYTECODE_OP_LOAD_FIELD_DOUBLE): |
3834b99f MD |
1771 | { |
1772 | ret = -EINVAL; | |
1773 | goto end; | |
1774 | } | |
1775 | ||
80c2a69a | 1776 | OP(BYTECODE_OP_LOAD_FIELD_STRING): |
3834b99f MD |
1777 | { |
1778 | const char *str; | |
1779 | ||
1780 | dbg_printk("op load field string\n"); | |
1781 | str = (const char *) estack_ax(stack, top)->u.ptr.ptr; | |
1782 | estack_ax(stack, top)->u.s.str = str; | |
1783 | if (unlikely(!estack_ax(stack, top)->u.s.str)) { | |
80c2a69a | 1784 | dbg_printk("Bytecode warning: loading a NULL string.\n"); |
3834b99f MD |
1785 | ret = -EINVAL; |
1786 | goto end; | |
1787 | } | |
4efe037b | 1788 | estack_ax(stack, top)->u.s.seq_len = LTTNG_SIZE_MAX; |
3834b99f MD |
1789 | estack_ax(stack, top)->u.s.literal_type = |
1790 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
d644d1df | 1791 | estack_ax(stack, top)->type = REG_STRING; |
3834b99f MD |
1792 | next_pc += sizeof(struct load_op); |
1793 | PO; | |
1794 | } | |
1795 | ||
80c2a69a | 1796 | OP(BYTECODE_OP_LOAD_FIELD_SEQUENCE): |
3834b99f MD |
1797 | { |
1798 | const char *ptr; | |
1799 | ||
1800 | dbg_printk("op load field string sequence\n"); | |
1801 | ptr = estack_ax(stack, top)->u.ptr.ptr; | |
1802 | estack_ax(stack, top)->u.s.seq_len = *(unsigned long *) ptr; | |
1803 | estack_ax(stack, top)->u.s.str = *(const char **) (ptr + sizeof(unsigned long)); | |
1804 | if (unlikely(!estack_ax(stack, top)->u.s.str)) { | |
80c2a69a | 1805 | dbg_printk("Bytecode warning: loading a NULL sequence.\n"); |
3834b99f MD |
1806 | ret = -EINVAL; |
1807 | goto end; | |
1808 | } | |
1809 | estack_ax(stack, top)->u.s.literal_type = | |
1810 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
d644d1df | 1811 | estack_ax(stack, top)->type = REG_STRING; |
3834b99f MD |
1812 | next_pc += sizeof(struct load_op); |
1813 | PO; | |
1814 | } | |
1815 | ||
07dfc1d0 MD |
1816 | END_OP |
1817 | end: | |
8a445457 | 1818 | /* No need to prepare output if an error occurred. */ |
07dfc1d0 | 1819 | if (ret) |
8a445457 | 1820 | return LTTNG_KERNEL_BYTECODE_INTERPRETER_ERROR; |
03cb0cdd | 1821 | |
8a445457 MD |
1822 | /* Prepare output. */ |
1823 | switch (kernel_bytecode->type) { | |
1824 | case LTTNG_KERNEL_BYTECODE_TYPE_FILTER: | |
1825 | { | |
1826 | struct lttng_kernel_bytecode_filter_ctx *filter_ctx = | |
1827 | (struct lttng_kernel_bytecode_filter_ctx *) caller_ctx; | |
1828 | if (retval) | |
1829 | filter_ctx->result = LTTNG_KERNEL_BYTECODE_FILTER_ACCEPT; | |
1830 | else | |
1831 | filter_ctx->result = LTTNG_KERNEL_BYTECODE_FILTER_REJECT; | |
1832 | break; | |
03cb0cdd | 1833 | } |
8a445457 MD |
1834 | case LTTNG_KERNEL_BYTECODE_TYPE_CAPTURE: |
1835 | ret = lttng_bytecode_interpret_format_output(estack_ax(stack, top), | |
1836 | (struct lttng_interpreter_output *) caller_ctx); | |
1837 | break; | |
1838 | default: | |
1839 | ret = -EINVAL; | |
1840 | break; | |
1841 | } | |
1842 | if (ret) | |
1843 | return LTTNG_KERNEL_BYTECODE_INTERPRETER_ERROR; | |
1844 | else | |
1845 | return LTTNG_KERNEL_BYTECODE_INTERPRETER_OK; | |
03cb0cdd | 1846 | } |
8a445457 | 1847 | LTTNG_STACK_FRAME_NON_STANDARD(lttng_bytecode_interpret); |
07dfc1d0 | 1848 | |
8a445457 MD |
1849 | /* |
1850 | * Return LTTNG_KERNEL_EVENT_FILTER_ACCEPT or LTTNG_KERNEL_EVENT_FILTER_REJECT. | |
1851 | */ | |
1852 | int lttng_kernel_interpret_event_filter(const struct lttng_kernel_event_common *event, | |
1853 | const char *interpreter_stack_data, | |
a92e844e | 1854 | struct lttng_kernel_probe_ctx *probe_ctx, |
8a445457 | 1855 | void *event_filter_ctx __attribute__((unused))) |
99d223ad | 1856 | { |
218585b9 | 1857 | struct lttng_kernel_bytecode_runtime *filter_bc_runtime; |
8a445457 MD |
1858 | struct list_head *filter_bytecode_runtime_head = &event->priv->filter_bytecode_runtime_head; |
1859 | struct lttng_kernel_bytecode_filter_ctx bytecode_filter_ctx; | |
1860 | bool filter_record = false; | |
1861 | ||
1862 | list_for_each_entry_rcu(filter_bc_runtime, filter_bytecode_runtime_head, node) { | |
1863 | if (likely(filter_bc_runtime->interpreter_func(filter_bc_runtime, | |
1864 | interpreter_stack_data, probe_ctx, &bytecode_filter_ctx) == LTTNG_KERNEL_BYTECODE_INTERPRETER_OK)) { | |
1865 | if (unlikely(bytecode_filter_ctx.result == LTTNG_KERNEL_BYTECODE_FILTER_ACCEPT)) { | |
1866 | filter_record = true; | |
1867 | break; | |
1868 | } | |
1869 | } | |
1870 | } | |
1871 | if (filter_record) | |
1872 | return LTTNG_KERNEL_EVENT_FILTER_ACCEPT; | |
1873 | else | |
1874 | return LTTNG_KERNEL_EVENT_FILTER_REJECT; | |
99d223ad FD |
1875 | } |
1876 | ||
07dfc1d0 MD |
1877 | #undef START_OP |
1878 | #undef OP | |
1879 | #undef PO | |
1880 | #undef END_OP |