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 | ||
80bb2600 | 10 | #include <wrapper/uaccess.h> |
d9053936 | 11 | #include <wrapper/objtool.h> |
cbc19040 | 12 | #include <wrapper/types.h> |
3834b99f | 13 | #include <linux/swab.h> |
f127e61e | 14 | |
80c2a69a | 15 | #include <lttng/lttng-bytecode.h> |
2df37e95 | 16 | #include <lttng/string-utils.h> |
437d5aa5 | 17 | #include <lttng/events-internal.h> |
07dfc1d0 | 18 | |
f127e61e MD |
19 | /* |
20 | * get_char should be called with page fault handler disabled if it is expected | |
21 | * to handle user-space read. | |
22 | */ | |
23 | static | |
acbe9250 | 24 | char get_char(const struct estack_entry *reg, size_t offset) |
f127e61e MD |
25 | { |
26 | if (unlikely(offset >= reg->u.s.seq_len)) | |
27 | return '\0'; | |
28 | if (reg->u.s.user) { | |
29 | char c; | |
30 | ||
31 | /* Handle invalid access as end of string. */ | |
80bb2600 | 32 | if (unlikely(!lttng_access_ok(VERIFY_READ, |
f127e61e MD |
33 | reg->u.s.user_str + offset, |
34 | sizeof(c)))) | |
35 | return '\0'; | |
36 | /* Handle fault (nonzero return value) as end of string. */ | |
37 | if (unlikely(__copy_from_user_inatomic(&c, | |
38 | reg->u.s.user_str + offset, | |
39 | sizeof(c)))) | |
40 | return '\0'; | |
41 | return c; | |
42 | } else { | |
43 | return reg->u.s.str[offset]; | |
44 | } | |
45 | } | |
46 | ||
07dfc1d0 MD |
47 | /* |
48 | * -1: wildcard found. | |
49 | * -2: unknown escape char. | |
50 | * 0: normal char. | |
51 | */ | |
07dfc1d0 | 52 | static |
f127e61e | 53 | int parse_char(struct estack_entry *reg, char *c, size_t *offset) |
07dfc1d0 | 54 | { |
f127e61e | 55 | switch (*c) { |
07dfc1d0 | 56 | case '\\': |
f127e61e MD |
57 | (*offset)++; |
58 | *c = get_char(reg, *offset); | |
59 | switch (*c) { | |
07dfc1d0 MD |
60 | case '\\': |
61 | case '*': | |
62 | return 0; | |
63 | default: | |
64 | return -2; | |
65 | } | |
66 | case '*': | |
67 | return -1; | |
68 | default: | |
69 | return 0; | |
70 | } | |
71 | } | |
72 | ||
02aca193 PP |
73 | static |
74 | char get_char_at_cb(size_t at, void *data) | |
75 | { | |
76 | return get_char(data, at); | |
77 | } | |
78 | ||
79 | static | |
80 | int stack_star_glob_match(struct estack *stack, int top, const char *cmp_type) | |
81 | { | |
82 | bool has_user = false; | |
02aca193 PP |
83 | int result; |
84 | struct estack_entry *pattern_reg; | |
85 | struct estack_entry *candidate_reg; | |
86 | ||
6f192a16 | 87 | /* Disable the page fault handler when reading from userspace. */ |
02aca193 PP |
88 | if (estack_bx(stack, top)->u.s.user |
89 | || estack_ax(stack, top)->u.s.user) { | |
90 | has_user = true; | |
02aca193 PP |
91 | pagefault_disable(); |
92 | } | |
93 | ||
94 | /* Find out which side is the pattern vs. the candidate. */ | |
95 | if (estack_ax(stack, top)->u.s.literal_type == ESTACK_STRING_LITERAL_TYPE_STAR_GLOB) { | |
96 | pattern_reg = estack_ax(stack, top); | |
97 | candidate_reg = estack_bx(stack, top); | |
98 | } else { | |
99 | pattern_reg = estack_bx(stack, top); | |
100 | candidate_reg = estack_ax(stack, top); | |
101 | } | |
102 | ||
103 | /* Perform the match operation. */ | |
104 | result = !strutils_star_glob_match_char_cb(get_char_at_cb, | |
105 | pattern_reg, get_char_at_cb, candidate_reg); | |
6f192a16 | 106 | if (has_user) |
02aca193 | 107 | pagefault_enable(); |
02aca193 PP |
108 | |
109 | return result; | |
110 | } | |
111 | ||
07dfc1d0 MD |
112 | static |
113 | int stack_strcmp(struct estack *stack, int top, const char *cmp_type) | |
114 | { | |
f127e61e MD |
115 | size_t offset_bx = 0, offset_ax = 0; |
116 | int diff, has_user = 0; | |
f127e61e MD |
117 | |
118 | if (estack_bx(stack, top)->u.s.user | |
119 | || estack_ax(stack, top)->u.s.user) { | |
120 | has_user = 1; | |
f127e61e MD |
121 | pagefault_disable(); |
122 | } | |
07dfc1d0 MD |
123 | |
124 | for (;;) { | |
f127e61e | 125 | int ret; |
07dfc1d0 | 126 | int escaped_r0 = 0; |
f127e61e | 127 | char char_bx, char_ax; |
07dfc1d0 | 128 | |
f127e61e MD |
129 | char_bx = get_char(estack_bx(stack, top), offset_bx); |
130 | char_ax = get_char(estack_ax(stack, top), offset_ax); | |
131 | ||
132 | if (unlikely(char_bx == '\0')) { | |
133 | if (char_ax == '\0') { | |
134 | diff = 0; | |
135 | break; | |
07dfc1d0 | 136 | } else { |
02aca193 PP |
137 | if (estack_ax(stack, top)->u.s.literal_type == |
138 | ESTACK_STRING_LITERAL_TYPE_PLAIN) { | |
f127e61e MD |
139 | ret = parse_char(estack_ax(stack, top), |
140 | &char_ax, &offset_ax); | |
141 | if (ret == -1) { | |
142 | diff = 0; | |
143 | break; | |
144 | } | |
07dfc1d0 | 145 | } |
f127e61e MD |
146 | diff = -1; |
147 | break; | |
07dfc1d0 MD |
148 | } |
149 | } | |
f127e61e | 150 | if (unlikely(char_ax == '\0')) { |
02aca193 PP |
151 | if (estack_bx(stack, top)->u.s.literal_type == |
152 | ESTACK_STRING_LITERAL_TYPE_PLAIN) { | |
abfd272b MD |
153 | ret = parse_char(estack_bx(stack, top), |
154 | &char_bx, &offset_bx); | |
155 | if (ret == -1) { | |
156 | diff = 0; | |
157 | break; | |
07dfc1d0 | 158 | } |
07dfc1d0 | 159 | } |
abfd272b MD |
160 | diff = 1; |
161 | break; | |
07dfc1d0 | 162 | } |
02aca193 PP |
163 | if (estack_bx(stack, top)->u.s.literal_type == |
164 | ESTACK_STRING_LITERAL_TYPE_PLAIN) { | |
f127e61e MD |
165 | ret = parse_char(estack_bx(stack, top), |
166 | &char_bx, &offset_bx); | |
07dfc1d0 | 167 | if (ret == -1) { |
f127e61e MD |
168 | diff = 0; |
169 | break; | |
07dfc1d0 MD |
170 | } else if (ret == -2) { |
171 | escaped_r0 = 1; | |
172 | } | |
173 | /* else compare both char */ | |
174 | } | |
02aca193 PP |
175 | if (estack_ax(stack, top)->u.s.literal_type == |
176 | ESTACK_STRING_LITERAL_TYPE_PLAIN) { | |
f127e61e MD |
177 | ret = parse_char(estack_ax(stack, top), |
178 | &char_ax, &offset_ax); | |
07dfc1d0 | 179 | if (ret == -1) { |
f127e61e MD |
180 | diff = 0; |
181 | break; | |
07dfc1d0 | 182 | } else if (ret == -2) { |
f127e61e MD |
183 | if (!escaped_r0) { |
184 | diff = -1; | |
185 | break; | |
186 | } | |
07dfc1d0 | 187 | } else { |
f127e61e MD |
188 | if (escaped_r0) { |
189 | diff = 1; | |
190 | break; | |
191 | } | |
07dfc1d0 MD |
192 | } |
193 | } else { | |
f127e61e MD |
194 | if (escaped_r0) { |
195 | diff = 1; | |
196 | break; | |
197 | } | |
07dfc1d0 | 198 | } |
f127e61e | 199 | diff = char_bx - char_ax; |
07dfc1d0 MD |
200 | if (diff != 0) |
201 | break; | |
f127e61e MD |
202 | offset_bx++; |
203 | offset_ax++; | |
204 | } | |
6f192a16 | 205 | if (has_user) |
f127e61e | 206 | pagefault_enable(); |
6f192a16 | 207 | |
07dfc1d0 MD |
208 | return diff; |
209 | } | |
210 | ||
8a445457 MD |
211 | int lttng_bytecode_interpret_error( |
212 | struct lttng_bytecode_runtime *bytecode_runtime __attribute__((unused)), | |
213 | const char *stack_data __attribute__((unused)), | |
214 | struct lttng_probe_ctx *probe_ctx __attribute__((unused)), | |
215 | void *ctx __attribute__((unused))) | |
99d223ad | 216 | { |
8a445457 | 217 | return LTTNG_KERNEL_BYTECODE_INTERPRETER_ERROR; |
99d223ad FD |
218 | } |
219 | ||
07dfc1d0 MD |
220 | #ifdef INTERPRETER_USE_SWITCH |
221 | ||
222 | /* | |
223 | * Fallback for compilers that do not support taking address of labels. | |
224 | */ | |
225 | ||
226 | #define START_OP \ | |
227 | start_pc = &bytecode->data[0]; \ | |
228 | for (pc = next_pc = start_pc; pc - start_pc < bytecode->len; \ | |
229 | pc = next_pc) { \ | |
5a15f70c | 230 | dbg_printk("LTTng: Executing op %s (%u)\n", \ |
80c2a69a FD |
231 | lttng_bytecode_print_op((unsigned int) *(bytecode_opcode_t *) pc), \ |
232 | (unsigned int) *(bytecode_opcode_t *) pc); \ | |
233 | switch (*(bytecode_opcode_t *) pc) { | |
07dfc1d0 MD |
234 | |
235 | #define OP(name) case name | |
236 | ||
237 | #define PO break | |
238 | ||
239 | #define END_OP } \ | |
240 | } | |
241 | ||
242 | #else | |
243 | ||
244 | /* | |
245 | * Dispatch-table based interpreter. | |
246 | */ | |
247 | ||
248 | #define START_OP \ | |
3834b99f | 249 | start_pc = &bytecode->code[0]; \ |
07dfc1d0 MD |
250 | pc = next_pc = start_pc; \ |
251 | if (unlikely(pc - start_pc >= bytecode->len)) \ | |
252 | goto end; \ | |
80c2a69a | 253 | goto *dispatch[*(bytecode_opcode_t *) pc]; |
07dfc1d0 MD |
254 | |
255 | #define OP(name) \ | |
256 | LABEL_##name | |
257 | ||
258 | #define PO \ | |
259 | pc = next_pc; \ | |
80c2a69a | 260 | goto *dispatch[*(bytecode_opcode_t *) pc]; |
07dfc1d0 MD |
261 | |
262 | #define END_OP | |
263 | ||
264 | #endif | |
265 | ||
1242217a FD |
266 | #define IS_INTEGER_REGISTER(reg_type) \ |
267 | (reg_type == REG_S64 || reg_type == REG_U64) | |
d644d1df | 268 | |
3834b99f MD |
269 | static int context_get_index(struct lttng_probe_ctx *lttng_probe_ctx, |
270 | struct load_ptr *ptr, | |
271 | uint32_t idx) | |
272 | { | |
273 | ||
437d5aa5 MD |
274 | struct lttng_kernel_ctx_field *ctx_field; |
275 | const struct lttng_kernel_event_field *field; | |
ea2d95e4 | 276 | struct lttng_ctx_value v; |
3834b99f MD |
277 | |
278 | ctx_field = <tng_static_ctx->fields[idx]; | |
437d5aa5 | 279 | field = ctx_field->event_field; |
3834b99f MD |
280 | ptr->type = LOAD_OBJECT; |
281 | /* field is only used for types nested within variants. */ | |
282 | ptr->field = NULL; | |
283 | ||
437d5aa5 | 284 | switch (field->type->type) { |
12bb2edb | 285 | case lttng_kernel_type_integer: |
ea2d95e4 | 286 | ctx_field->get_value(ctx_field->priv, lttng_probe_ctx, &v); |
437d5aa5 | 287 | if (lttng_kernel_get_type_integer(field->type)->signedness) { |
3834b99f | 288 | ptr->object_type = OBJECT_TYPE_S64; |
ea2d95e4 | 289 | ptr->u.s64 = v.u.s64; |
3834b99f MD |
290 | ptr->ptr = &ptr->u.s64; |
291 | } else { | |
292 | ptr->object_type = OBJECT_TYPE_U64; | |
ea2d95e4 | 293 | ptr->u.u64 = v.u.s64; /* Cast. */ |
3834b99f MD |
294 | ptr->ptr = &ptr->u.u64; |
295 | } | |
296 | break; | |
437d5aa5 | 297 | case lttng_kernel_type_enum: |
3834b99f | 298 | { |
437d5aa5 MD |
299 | const struct lttng_kernel_type_enum *enum_type = lttng_kernel_get_type_enum(field->type); |
300 | const struct lttng_kernel_type_integer *integer_type = lttng_kernel_get_type_integer(enum_type->container_type); | |
3834b99f | 301 | |
ea2d95e4 | 302 | ctx_field->get_value(ctx_field->priv, lttng_probe_ctx, &v); |
437d5aa5 | 303 | if (integer_type->signedness) { |
29a574c3 | 304 | ptr->object_type = OBJECT_TYPE_SIGNED_ENUM; |
ea2d95e4 | 305 | ptr->u.s64 = v.u.s64; |
3834b99f MD |
306 | ptr->ptr = &ptr->u.s64; |
307 | } else { | |
29a574c3 | 308 | ptr->object_type = OBJECT_TYPE_UNSIGNED_ENUM; |
ea2d95e4 | 309 | ptr->u.u64 = v.u.s64; /* Cast. */ |
3834b99f MD |
310 | ptr->ptr = &ptr->u.u64; |
311 | } | |
312 | break; | |
313 | } | |
437d5aa5 MD |
314 | case lttng_kernel_type_array: |
315 | { | |
316 | const struct lttng_kernel_type_array *array_type = lttng_kernel_get_type_array(field->type); | |
317 | ||
318 | if (!lttng_kernel_type_is_bytewise_integer(array_type->elem_type)) { | |
80c2a69a | 319 | printk(KERN_WARNING "LTTng: bytecode: Array nesting only supports integer types.\n"); |
3834b99f MD |
320 | return -EINVAL; |
321 | } | |
437d5aa5 | 322 | if (array_type->encoding == lttng_kernel_string_encoding_none) { |
80c2a69a | 323 | printk(KERN_WARNING "LTTng: bytecode: Only string arrays are supported for contexts.\n"); |
3834b99f MD |
324 | return -EINVAL; |
325 | } | |
326 | ptr->object_type = OBJECT_TYPE_STRING; | |
ea2d95e4 MD |
327 | ctx_field->get_value(ctx_field->priv, lttng_probe_ctx, &v); |
328 | ptr->ptr = v.u.str; | |
3834b99f | 329 | break; |
437d5aa5 MD |
330 | } |
331 | case lttng_kernel_type_sequence: | |
332 | { | |
333 | const struct lttng_kernel_type_sequence *sequence_type = lttng_kernel_get_type_sequence(field->type); | |
334 | ||
335 | if (!lttng_kernel_type_is_bytewise_integer(sequence_type->elem_type)) { | |
80c2a69a | 336 | printk(KERN_WARNING "LTTng: bytecode: Sequence nesting only supports integer types.\n"); |
3834b99f MD |
337 | return -EINVAL; |
338 | } | |
437d5aa5 | 339 | if (sequence_type->encoding == lttng_kernel_string_encoding_none) { |
80c2a69a | 340 | printk(KERN_WARNING "LTTng: bytecode: Only string sequences are supported for contexts.\n"); |
3834b99f MD |
341 | return -EINVAL; |
342 | } | |
343 | ptr->object_type = OBJECT_TYPE_STRING; | |
ea2d95e4 MD |
344 | ctx_field->get_value(ctx_field->priv, lttng_probe_ctx, &v); |
345 | ptr->ptr = v.u.str; | |
3834b99f | 346 | break; |
437d5aa5 | 347 | } |
12bb2edb | 348 | case lttng_kernel_type_string: |
3834b99f | 349 | ptr->object_type = OBJECT_TYPE_STRING; |
ea2d95e4 MD |
350 | ctx_field->get_value(ctx_field->priv, lttng_probe_ctx, &v); |
351 | ptr->ptr = v.u.str; | |
3834b99f | 352 | break; |
437d5aa5 | 353 | case lttng_kernel_type_struct: |
80c2a69a | 354 | printk(KERN_WARNING "LTTng: bytecode: Structure type cannot be loaded.\n"); |
3834b99f | 355 | return -EINVAL; |
437d5aa5 | 356 | case lttng_kernel_type_variant: |
80c2a69a | 357 | printk(KERN_WARNING "LTTng: bytecode: Variant type cannot be loaded.\n"); |
ceabb767 | 358 | return -EINVAL; |
3834b99f | 359 | default: |
437d5aa5 | 360 | printk(KERN_WARNING "LTTng: bytecode: Unknown type: %d", (int) field->type->type); |
3834b99f MD |
361 | return -EINVAL; |
362 | } | |
363 | return 0; | |
364 | } | |
365 | ||
366 | static int dynamic_get_index(struct lttng_probe_ctx *lttng_probe_ctx, | |
367 | struct bytecode_runtime *runtime, | |
368 | uint64_t index, struct estack_entry *stack_top) | |
369 | { | |
370 | int ret; | |
80c2a69a | 371 | const struct bytecode_get_index_data *gid; |
3834b99f | 372 | |
80c2a69a | 373 | gid = (const struct bytecode_get_index_data *) &runtime->data[index]; |
3834b99f MD |
374 | switch (stack_top->u.ptr.type) { |
375 | case LOAD_OBJECT: | |
376 | switch (stack_top->u.ptr.object_type) { | |
377 | case OBJECT_TYPE_ARRAY: | |
378 | { | |
379 | const char *ptr; | |
380 | ||
381 | WARN_ON_ONCE(gid->offset >= gid->array_len); | |
382 | /* Skip count (unsigned long) */ | |
383 | ptr = *(const char **) (stack_top->u.ptr.ptr + sizeof(unsigned long)); | |
384 | ptr = ptr + gid->offset; | |
385 | stack_top->u.ptr.ptr = ptr; | |
386 | stack_top->u.ptr.object_type = gid->elem.type; | |
387 | stack_top->u.ptr.rev_bo = gid->elem.rev_bo; | |
437d5aa5 | 388 | BUG_ON(stack_top->u.ptr.field->type->type != lttng_kernel_type_array); |
3834b99f MD |
389 | stack_top->u.ptr.field = NULL; |
390 | break; | |
391 | } | |
392 | case OBJECT_TYPE_SEQUENCE: | |
393 | { | |
394 | const char *ptr; | |
395 | size_t ptr_seq_len; | |
396 | ||
397 | ptr = *(const char **) (stack_top->u.ptr.ptr + sizeof(unsigned long)); | |
398 | ptr_seq_len = *(unsigned long *) stack_top->u.ptr.ptr; | |
399 | if (gid->offset >= gid->elem.len * ptr_seq_len) { | |
400 | ret = -EINVAL; | |
401 | goto end; | |
402 | } | |
403 | ptr = ptr + gid->offset; | |
404 | stack_top->u.ptr.ptr = ptr; | |
405 | stack_top->u.ptr.object_type = gid->elem.type; | |
406 | stack_top->u.ptr.rev_bo = gid->elem.rev_bo; | |
437d5aa5 | 407 | BUG_ON(stack_top->u.ptr.field->type->type != lttng_kernel_type_sequence); |
3834b99f MD |
408 | stack_top->u.ptr.field = NULL; |
409 | break; | |
410 | } | |
411 | case OBJECT_TYPE_STRUCT: | |
80c2a69a | 412 | printk(KERN_WARNING "LTTng: bytecode: Nested structures are not supported yet.\n"); |
3834b99f MD |
413 | ret = -EINVAL; |
414 | goto end; | |
415 | case OBJECT_TYPE_VARIANT: | |
416 | default: | |
80c2a69a | 417 | printk(KERN_WARNING "LTTng: bytecode: Unexpected get index type %d", |
3834b99f MD |
418 | (int) stack_top->u.ptr.object_type); |
419 | ret = -EINVAL; | |
420 | goto end; | |
421 | } | |
422 | break; | |
423 | case LOAD_ROOT_CONTEXT: | |
424 | case LOAD_ROOT_APP_CONTEXT: /* Fall-through */ | |
425 | { | |
426 | ret = context_get_index(lttng_probe_ctx, | |
427 | &stack_top->u.ptr, | |
428 | gid->ctx_index); | |
429 | if (ret) { | |
430 | goto end; | |
431 | } | |
432 | break; | |
433 | } | |
434 | case LOAD_ROOT_PAYLOAD: | |
435 | stack_top->u.ptr.ptr += gid->offset; | |
436 | if (gid->elem.type == OBJECT_TYPE_STRING) | |
437 | stack_top->u.ptr.ptr = *(const char * const *) stack_top->u.ptr.ptr; | |
438 | stack_top->u.ptr.object_type = gid->elem.type; | |
439 | stack_top->u.ptr.type = LOAD_OBJECT; | |
03cb0cdd | 440 | stack_top->u.ptr.field = gid->field; |
60e8b0d6 | 441 | stack_top->u.ptr.rev_bo = gid->elem.rev_bo; |
3834b99f MD |
442 | break; |
443 | } | |
196e531f FD |
444 | |
445 | stack_top->type = REG_PTR; | |
446 | ||
3834b99f MD |
447 | return 0; |
448 | ||
449 | end: | |
450 | return ret; | |
451 | } | |
452 | ||
453 | static int dynamic_load_field(struct estack_entry *stack_top) | |
454 | { | |
455 | int ret; | |
456 | ||
457 | switch (stack_top->u.ptr.type) { | |
458 | case LOAD_OBJECT: | |
459 | break; | |
460 | case LOAD_ROOT_CONTEXT: | |
461 | case LOAD_ROOT_APP_CONTEXT: | |
462 | case LOAD_ROOT_PAYLOAD: | |
463 | default: | |
80c2a69a | 464 | dbg_printk("Bytecode warning: cannot load root, missing field name.\n"); |
3834b99f MD |
465 | ret = -EINVAL; |
466 | goto end; | |
467 | } | |
468 | switch (stack_top->u.ptr.object_type) { | |
469 | case OBJECT_TYPE_S8: | |
470 | dbg_printk("op load field s8\n"); | |
471 | stack_top->u.v = *(int8_t *) stack_top->u.ptr.ptr; | |
d644d1df | 472 | stack_top->type = REG_S64; |
3834b99f MD |
473 | break; |
474 | case OBJECT_TYPE_S16: | |
475 | { | |
476 | int16_t tmp; | |
477 | ||
478 | dbg_printk("op load field s16\n"); | |
479 | tmp = *(int16_t *) stack_top->u.ptr.ptr; | |
480 | if (stack_top->u.ptr.rev_bo) | |
481 | __swab16s(&tmp); | |
482 | stack_top->u.v = tmp; | |
d644d1df | 483 | stack_top->type = REG_S64; |
3834b99f MD |
484 | break; |
485 | } | |
486 | case OBJECT_TYPE_S32: | |
487 | { | |
488 | int32_t tmp; | |
489 | ||
490 | dbg_printk("op load field s32\n"); | |
491 | tmp = *(int32_t *) stack_top->u.ptr.ptr; | |
492 | if (stack_top->u.ptr.rev_bo) | |
493 | __swab32s(&tmp); | |
494 | stack_top->u.v = tmp; | |
d644d1df | 495 | stack_top->type = REG_S64; |
3834b99f MD |
496 | break; |
497 | } | |
498 | case OBJECT_TYPE_S64: | |
499 | { | |
500 | int64_t tmp; | |
501 | ||
502 | dbg_printk("op load field s64\n"); | |
503 | tmp = *(int64_t *) stack_top->u.ptr.ptr; | |
504 | if (stack_top->u.ptr.rev_bo) | |
505 | __swab64s(&tmp); | |
506 | stack_top->u.v = tmp; | |
d644d1df | 507 | stack_top->type = REG_S64; |
3834b99f MD |
508 | break; |
509 | } | |
29a574c3 FD |
510 | case OBJECT_TYPE_SIGNED_ENUM: |
511 | { | |
512 | int64_t tmp; | |
513 | ||
514 | dbg_printk("op load field signed enumeration\n"); | |
515 | tmp = *(int64_t *) stack_top->u.ptr.ptr; | |
516 | if (stack_top->u.ptr.rev_bo) | |
517 | __swab64s(&tmp); | |
518 | stack_top->u.v = tmp; | |
519 | stack_top->type = REG_S64; | |
520 | break; | |
521 | } | |
3834b99f MD |
522 | case OBJECT_TYPE_U8: |
523 | dbg_printk("op load field u8\n"); | |
524 | stack_top->u.v = *(uint8_t *) stack_top->u.ptr.ptr; | |
1242217a | 525 | stack_top->type = REG_U64; |
3834b99f MD |
526 | break; |
527 | case OBJECT_TYPE_U16: | |
528 | { | |
529 | uint16_t tmp; | |
530 | ||
5fae98f7 | 531 | dbg_printk("op load field u16\n"); |
3834b99f MD |
532 | tmp = *(uint16_t *) stack_top->u.ptr.ptr; |
533 | if (stack_top->u.ptr.rev_bo) | |
534 | __swab16s(&tmp); | |
535 | stack_top->u.v = tmp; | |
1242217a | 536 | stack_top->type = REG_U64; |
3834b99f MD |
537 | break; |
538 | } | |
539 | case OBJECT_TYPE_U32: | |
540 | { | |
541 | uint32_t tmp; | |
542 | ||
543 | dbg_printk("op load field u32\n"); | |
544 | tmp = *(uint32_t *) stack_top->u.ptr.ptr; | |
545 | if (stack_top->u.ptr.rev_bo) | |
546 | __swab32s(&tmp); | |
547 | stack_top->u.v = tmp; | |
1242217a | 548 | stack_top->type = REG_U64; |
3834b99f MD |
549 | break; |
550 | } | |
551 | case OBJECT_TYPE_U64: | |
552 | { | |
553 | uint64_t tmp; | |
554 | ||
555 | dbg_printk("op load field u64\n"); | |
556 | tmp = *(uint64_t *) stack_top->u.ptr.ptr; | |
557 | if (stack_top->u.ptr.rev_bo) | |
558 | __swab64s(&tmp); | |
559 | stack_top->u.v = tmp; | |
1242217a | 560 | stack_top->type = REG_U64; |
3834b99f MD |
561 | break; |
562 | } | |
29a574c3 FD |
563 | case OBJECT_TYPE_UNSIGNED_ENUM: |
564 | { | |
565 | uint64_t tmp; | |
566 | ||
567 | dbg_printk("op load field unsigned enumeration\n"); | |
568 | tmp = *(uint64_t *) stack_top->u.ptr.ptr; | |
569 | if (stack_top->u.ptr.rev_bo) | |
570 | __swab64s(&tmp); | |
571 | stack_top->u.v = tmp; | |
572 | stack_top->type = REG_U64; | |
573 | break; | |
574 | } | |
3834b99f MD |
575 | case OBJECT_TYPE_STRING: |
576 | { | |
577 | const char *str; | |
578 | ||
579 | dbg_printk("op load field string\n"); | |
580 | str = (const char *) stack_top->u.ptr.ptr; | |
581 | stack_top->u.s.str = str; | |
582 | if (unlikely(!stack_top->u.s.str)) { | |
80c2a69a | 583 | dbg_printk("Bytecode warning: loading a NULL string.\n"); |
3834b99f MD |
584 | ret = -EINVAL; |
585 | goto end; | |
586 | } | |
4efe037b | 587 | stack_top->u.s.seq_len = LTTNG_SIZE_MAX; |
3834b99f MD |
588 | stack_top->u.s.literal_type = |
589 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
d644d1df | 590 | stack_top->type = REG_STRING; |
3834b99f MD |
591 | break; |
592 | } | |
593 | case OBJECT_TYPE_STRING_SEQUENCE: | |
594 | { | |
595 | const char *ptr; | |
596 | ||
597 | dbg_printk("op load field string sequence\n"); | |
598 | ptr = stack_top->u.ptr.ptr; | |
599 | stack_top->u.s.seq_len = *(unsigned long *) ptr; | |
600 | stack_top->u.s.str = *(const char **) (ptr + sizeof(unsigned long)); | |
601 | if (unlikely(!stack_top->u.s.str)) { | |
80c2a69a | 602 | dbg_printk("Bytecode warning: loading a NULL sequence.\n"); |
3834b99f MD |
603 | ret = -EINVAL; |
604 | goto end; | |
605 | } | |
606 | stack_top->u.s.literal_type = | |
607 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
d644d1df | 608 | stack_top->type = REG_STRING; |
3834b99f MD |
609 | break; |
610 | } | |
611 | case OBJECT_TYPE_DYNAMIC: | |
612 | /* | |
613 | * Dynamic types in context are looked up | |
614 | * by context get index. | |
615 | */ | |
616 | ret = -EINVAL; | |
617 | goto end; | |
618 | case OBJECT_TYPE_DOUBLE: | |
619 | ret = -EINVAL; | |
620 | goto end; | |
621 | case OBJECT_TYPE_SEQUENCE: | |
622 | case OBJECT_TYPE_ARRAY: | |
623 | case OBJECT_TYPE_STRUCT: | |
624 | case OBJECT_TYPE_VARIANT: | |
80c2a69a | 625 | printk(KERN_WARNING "LTTng: bytecode: Sequences, arrays, struct and variant cannot be loaded (nested types).\n"); |
3834b99f MD |
626 | ret = -EINVAL; |
627 | goto end; | |
628 | } | |
629 | return 0; | |
630 | ||
631 | end: | |
632 | return ret; | |
633 | } | |
634 | ||
03cb0cdd FD |
635 | static |
636 | int lttng_bytecode_interpret_format_output(struct estack_entry *ax, | |
637 | struct lttng_interpreter_output *output) | |
638 | { | |
639 | int ret; | |
640 | ||
641 | again: | |
642 | switch (ax->type) { | |
643 | case REG_S64: | |
644 | output->type = LTTNG_INTERPRETER_TYPE_S64; | |
645 | output->u.s = ax->u.v; | |
646 | break; | |
647 | case REG_U64: | |
648 | output->type = LTTNG_INTERPRETER_TYPE_U64; | |
649 | output->u.u = (uint64_t) ax->u.v; | |
650 | break; | |
651 | case REG_STRING: | |
652 | output->type = LTTNG_INTERPRETER_TYPE_STRING; | |
653 | output->u.str.str = ax->u.s.str; | |
654 | output->u.str.len = ax->u.s.seq_len; | |
655 | break; | |
656 | case REG_PTR: | |
657 | switch (ax->u.ptr.object_type) { | |
658 | case OBJECT_TYPE_S8: | |
659 | case OBJECT_TYPE_S16: | |
660 | case OBJECT_TYPE_S32: | |
661 | case OBJECT_TYPE_S64: | |
662 | case OBJECT_TYPE_U8: | |
663 | case OBJECT_TYPE_U16: | |
664 | case OBJECT_TYPE_U32: | |
665 | case OBJECT_TYPE_U64: | |
666 | case OBJECT_TYPE_DOUBLE: | |
667 | case OBJECT_TYPE_STRING: | |
668 | case OBJECT_TYPE_STRING_SEQUENCE: | |
669 | ret = dynamic_load_field(ax); | |
670 | if (ret) | |
671 | return ret; | |
672 | /* Retry after loading ptr into stack top. */ | |
673 | goto again; | |
674 | case OBJECT_TYPE_SEQUENCE: | |
675 | output->type = LTTNG_INTERPRETER_TYPE_SEQUENCE; | |
676 | output->u.sequence.ptr = *(const char **) (ax->u.ptr.ptr + sizeof(unsigned long)); | |
677 | output->u.sequence.nr_elem = *(unsigned long *) ax->u.ptr.ptr; | |
437d5aa5 | 678 | output->u.sequence.nested_type = lttng_kernel_get_type_sequence(ax->u.ptr.field->type)->elem_type; |
03cb0cdd FD |
679 | break; |
680 | case OBJECT_TYPE_ARRAY: | |
681 | /* Skip count (unsigned long) */ | |
682 | output->type = LTTNG_INTERPRETER_TYPE_SEQUENCE; | |
683 | output->u.sequence.ptr = *(const char **) (ax->u.ptr.ptr + sizeof(unsigned long)); | |
437d5aa5 MD |
684 | output->u.sequence.nr_elem = lttng_kernel_get_type_array(ax->u.ptr.field->type)->length; |
685 | output->u.sequence.nested_type = lttng_kernel_get_type_array(ax->u.ptr.field->type)->elem_type; | |
03cb0cdd | 686 | break; |
29a574c3 FD |
687 | case OBJECT_TYPE_SIGNED_ENUM: |
688 | ret = dynamic_load_field(ax); | |
689 | if (ret) | |
690 | return ret; | |
691 | output->type = LTTNG_INTERPRETER_TYPE_SIGNED_ENUM; | |
692 | output->u.s = ax->u.v; | |
693 | break; | |
694 | case OBJECT_TYPE_UNSIGNED_ENUM: | |
695 | ret = dynamic_load_field(ax); | |
696 | if (ret) | |
697 | return ret; | |
698 | output->type = LTTNG_INTERPRETER_TYPE_UNSIGNED_ENUM; | |
699 | output->u.u = ax->u.v; | |
700 | break; | |
03cb0cdd FD |
701 | case OBJECT_TYPE_STRUCT: |
702 | case OBJECT_TYPE_VARIANT: | |
703 | default: | |
704 | return -EINVAL; | |
705 | } | |
706 | ||
707 | break; | |
708 | case REG_STAR_GLOB_STRING: | |
709 | case REG_TYPE_UNKNOWN: | |
710 | default: | |
711 | return -EINVAL; | |
712 | } | |
713 | ||
8a445457 | 714 | return 0; |
03cb0cdd FD |
715 | } |
716 | ||
acbe9250 JG |
717 | #ifdef DEBUG |
718 | ||
719 | #define DBG_USER_STR_CUTOFF 32 | |
720 | ||
721 | /* | |
722 | * In debug mode, print user string (truncated, if necessary). | |
723 | */ | |
724 | static inline | |
725 | void dbg_load_ref_user_str_printk(const struct estack_entry *user_str_reg) | |
726 | { | |
727 | size_t pos = 0; | |
728 | char last_char; | |
729 | char user_str[DBG_USER_STR_CUTOFF]; | |
730 | ||
731 | pagefault_disable(); | |
732 | do { | |
733 | last_char = get_char(user_str_reg, pos); | |
734 | user_str[pos] = last_char; | |
735 | pos++; | |
736 | } while (last_char != '\0' && pos < sizeof(user_str)); | |
737 | pagefault_enable(); | |
738 | ||
739 | user_str[sizeof(user_str) - 1] = '\0'; | |
740 | dbg_printk("load field ref user string: '%s%s'\n", user_str, | |
741 | last_char != '\0' ? "[...]" : ""); | |
742 | } | |
743 | #else | |
744 | static inline | |
745 | void dbg_load_ref_user_str_printk(const struct estack_entry *user_str_reg) | |
746 | { | |
747 | } | |
748 | #endif | |
749 | ||
07dfc1d0 | 750 | /* |
8a445457 MD |
751 | * Return LTTNG_KERNEL_BYTECODE_INTERPRETER_OK on success. |
752 | * Return LTTNG_KERNEL_BYTECODE_INTERPRETER_ERROR on error. | |
753 | * | |
754 | * For FILTER bytecode: expect a struct lttng_kernel_bytecode_filter_ctx * | |
755 | * as @ctx argument. | |
756 | * For CAPTURE bytecode: expect a struct lttng_interpreter_output * | |
757 | * as @ctx argument. | |
07dfc1d0 | 758 | */ |
8a445457 | 759 | int lttng_bytecode_interpret(struct lttng_bytecode_runtime *kernel_bytecode, |
03cb0cdd | 760 | const char *interpreter_stack_data, |
a775608d | 761 | struct lttng_probe_ctx *lttng_probe_ctx, |
8a445457 | 762 | void *caller_ctx) |
07dfc1d0 | 763 | { |
8a445457 | 764 | struct bytecode_runtime *bytecode = container_of(kernel_bytecode, struct bytecode_runtime, p); |
07dfc1d0 MD |
765 | void *pc, *next_pc, *start_pc; |
766 | int ret = -EINVAL; | |
767 | uint64_t retval = 0; | |
768 | struct estack _stack; | |
769 | struct estack *stack = &_stack; | |
770 | register int64_t ax = 0, bx = 0; | |
d644d1df | 771 | register enum entry_type ax_t = REG_TYPE_UNKNOWN, bx_t = REG_TYPE_UNKNOWN; |
80c2a69a | 772 | register int top = INTERPRETER_STACK_EMPTY; |
07dfc1d0 | 773 | #ifndef INTERPRETER_USE_SWITCH |
80c2a69a FD |
774 | static void *dispatch[NR_BYTECODE_OPS] = { |
775 | [ BYTECODE_OP_UNKNOWN ] = &&LABEL_BYTECODE_OP_UNKNOWN, | |
07dfc1d0 | 776 | |
80c2a69a | 777 | [ BYTECODE_OP_RETURN ] = &&LABEL_BYTECODE_OP_RETURN, |
07dfc1d0 MD |
778 | |
779 | /* binary */ | |
80c2a69a FD |
780 | [ BYTECODE_OP_MUL ] = &&LABEL_BYTECODE_OP_MUL, |
781 | [ BYTECODE_OP_DIV ] = &&LABEL_BYTECODE_OP_DIV, | |
782 | [ BYTECODE_OP_MOD ] = &&LABEL_BYTECODE_OP_MOD, | |
783 | [ BYTECODE_OP_PLUS ] = &&LABEL_BYTECODE_OP_PLUS, | |
784 | [ BYTECODE_OP_MINUS ] = &&LABEL_BYTECODE_OP_MINUS, | |
785 | [ BYTECODE_OP_BIT_RSHIFT ] = &&LABEL_BYTECODE_OP_BIT_RSHIFT, | |
786 | [ BYTECODE_OP_BIT_LSHIFT ] = &&LABEL_BYTECODE_OP_BIT_LSHIFT, | |
787 | [ BYTECODE_OP_BIT_AND ] = &&LABEL_BYTECODE_OP_BIT_AND, | |
788 | [ BYTECODE_OP_BIT_OR ] = &&LABEL_BYTECODE_OP_BIT_OR, | |
789 | [ BYTECODE_OP_BIT_XOR ] = &&LABEL_BYTECODE_OP_BIT_XOR, | |
07dfc1d0 MD |
790 | |
791 | /* binary comparators */ | |
80c2a69a FD |
792 | [ BYTECODE_OP_EQ ] = &&LABEL_BYTECODE_OP_EQ, |
793 | [ BYTECODE_OP_NE ] = &&LABEL_BYTECODE_OP_NE, | |
794 | [ BYTECODE_OP_GT ] = &&LABEL_BYTECODE_OP_GT, | |
795 | [ BYTECODE_OP_LT ] = &&LABEL_BYTECODE_OP_LT, | |
796 | [ BYTECODE_OP_GE ] = &&LABEL_BYTECODE_OP_GE, | |
797 | [ BYTECODE_OP_LE ] = &&LABEL_BYTECODE_OP_LE, | |
07dfc1d0 MD |
798 | |
799 | /* string binary comparator */ | |
80c2a69a FD |
800 | [ BYTECODE_OP_EQ_STRING ] = &&LABEL_BYTECODE_OP_EQ_STRING, |
801 | [ BYTECODE_OP_NE_STRING ] = &&LABEL_BYTECODE_OP_NE_STRING, | |
802 | [ BYTECODE_OP_GT_STRING ] = &&LABEL_BYTECODE_OP_GT_STRING, | |
803 | [ BYTECODE_OP_LT_STRING ] = &&LABEL_BYTECODE_OP_LT_STRING, | |
804 | [ BYTECODE_OP_GE_STRING ] = &&LABEL_BYTECODE_OP_GE_STRING, | |
805 | [ BYTECODE_OP_LE_STRING ] = &&LABEL_BYTECODE_OP_LE_STRING, | |
07dfc1d0 | 806 | |
02aca193 | 807 | /* globbing pattern binary comparator */ |
80c2a69a FD |
808 | [ BYTECODE_OP_EQ_STAR_GLOB_STRING ] = &&LABEL_BYTECODE_OP_EQ_STAR_GLOB_STRING, |
809 | [ BYTECODE_OP_NE_STAR_GLOB_STRING ] = &&LABEL_BYTECODE_OP_NE_STAR_GLOB_STRING, | |
02aca193 | 810 | |
07dfc1d0 | 811 | /* s64 binary comparator */ |
80c2a69a FD |
812 | [ BYTECODE_OP_EQ_S64 ] = &&LABEL_BYTECODE_OP_EQ_S64, |
813 | [ BYTECODE_OP_NE_S64 ] = &&LABEL_BYTECODE_OP_NE_S64, | |
814 | [ BYTECODE_OP_GT_S64 ] = &&LABEL_BYTECODE_OP_GT_S64, | |
815 | [ BYTECODE_OP_LT_S64 ] = &&LABEL_BYTECODE_OP_LT_S64, | |
816 | [ BYTECODE_OP_GE_S64 ] = &&LABEL_BYTECODE_OP_GE_S64, | |
817 | [ BYTECODE_OP_LE_S64 ] = &&LABEL_BYTECODE_OP_LE_S64, | |
07dfc1d0 MD |
818 | |
819 | /* double binary comparator */ | |
80c2a69a FD |
820 | [ BYTECODE_OP_EQ_DOUBLE ] = &&LABEL_BYTECODE_OP_EQ_DOUBLE, |
821 | [ BYTECODE_OP_NE_DOUBLE ] = &&LABEL_BYTECODE_OP_NE_DOUBLE, | |
822 | [ BYTECODE_OP_GT_DOUBLE ] = &&LABEL_BYTECODE_OP_GT_DOUBLE, | |
823 | [ BYTECODE_OP_LT_DOUBLE ] = &&LABEL_BYTECODE_OP_LT_DOUBLE, | |
824 | [ BYTECODE_OP_GE_DOUBLE ] = &&LABEL_BYTECODE_OP_GE_DOUBLE, | |
825 | [ BYTECODE_OP_LE_DOUBLE ] = &&LABEL_BYTECODE_OP_LE_DOUBLE, | |
07dfc1d0 MD |
826 | |
827 | /* Mixed S64-double binary comparators */ | |
80c2a69a FD |
828 | [ BYTECODE_OP_EQ_DOUBLE_S64 ] = &&LABEL_BYTECODE_OP_EQ_DOUBLE_S64, |
829 | [ BYTECODE_OP_NE_DOUBLE_S64 ] = &&LABEL_BYTECODE_OP_NE_DOUBLE_S64, | |
830 | [ BYTECODE_OP_GT_DOUBLE_S64 ] = &&LABEL_BYTECODE_OP_GT_DOUBLE_S64, | |
831 | [ BYTECODE_OP_LT_DOUBLE_S64 ] = &&LABEL_BYTECODE_OP_LT_DOUBLE_S64, | |
832 | [ BYTECODE_OP_GE_DOUBLE_S64 ] = &&LABEL_BYTECODE_OP_GE_DOUBLE_S64, | |
833 | [ BYTECODE_OP_LE_DOUBLE_S64 ] = &&LABEL_BYTECODE_OP_LE_DOUBLE_S64, | |
834 | ||
835 | [ BYTECODE_OP_EQ_S64_DOUBLE ] = &&LABEL_BYTECODE_OP_EQ_S64_DOUBLE, | |
836 | [ BYTECODE_OP_NE_S64_DOUBLE ] = &&LABEL_BYTECODE_OP_NE_S64_DOUBLE, | |
837 | [ BYTECODE_OP_GT_S64_DOUBLE ] = &&LABEL_BYTECODE_OP_GT_S64_DOUBLE, | |
838 | [ BYTECODE_OP_LT_S64_DOUBLE ] = &&LABEL_BYTECODE_OP_LT_S64_DOUBLE, | |
839 | [ BYTECODE_OP_GE_S64_DOUBLE ] = &&LABEL_BYTECODE_OP_GE_S64_DOUBLE, | |
840 | [ BYTECODE_OP_LE_S64_DOUBLE ] = &&LABEL_BYTECODE_OP_LE_S64_DOUBLE, | |
07dfc1d0 MD |
841 | |
842 | /* unary */ | |
80c2a69a FD |
843 | [ BYTECODE_OP_UNARY_PLUS ] = &&LABEL_BYTECODE_OP_UNARY_PLUS, |
844 | [ BYTECODE_OP_UNARY_MINUS ] = &&LABEL_BYTECODE_OP_UNARY_MINUS, | |
845 | [ BYTECODE_OP_UNARY_NOT ] = &&LABEL_BYTECODE_OP_UNARY_NOT, | |
846 | [ BYTECODE_OP_UNARY_PLUS_S64 ] = &&LABEL_BYTECODE_OP_UNARY_PLUS_S64, | |
847 | [ BYTECODE_OP_UNARY_MINUS_S64 ] = &&LABEL_BYTECODE_OP_UNARY_MINUS_S64, | |
848 | [ BYTECODE_OP_UNARY_NOT_S64 ] = &&LABEL_BYTECODE_OP_UNARY_NOT_S64, | |
849 | [ BYTECODE_OP_UNARY_PLUS_DOUBLE ] = &&LABEL_BYTECODE_OP_UNARY_PLUS_DOUBLE, | |
850 | [ BYTECODE_OP_UNARY_MINUS_DOUBLE ] = &&LABEL_BYTECODE_OP_UNARY_MINUS_DOUBLE, | |
851 | [ BYTECODE_OP_UNARY_NOT_DOUBLE ] = &&LABEL_BYTECODE_OP_UNARY_NOT_DOUBLE, | |
07dfc1d0 MD |
852 | |
853 | /* logical */ | |
80c2a69a FD |
854 | [ BYTECODE_OP_AND ] = &&LABEL_BYTECODE_OP_AND, |
855 | [ BYTECODE_OP_OR ] = &&LABEL_BYTECODE_OP_OR, | |
07dfc1d0 MD |
856 | |
857 | /* load field ref */ | |
80c2a69a FD |
858 | [ BYTECODE_OP_LOAD_FIELD_REF ] = &&LABEL_BYTECODE_OP_LOAD_FIELD_REF, |
859 | [ BYTECODE_OP_LOAD_FIELD_REF_STRING ] = &&LABEL_BYTECODE_OP_LOAD_FIELD_REF_STRING, | |
860 | [ BYTECODE_OP_LOAD_FIELD_REF_SEQUENCE ] = &&LABEL_BYTECODE_OP_LOAD_FIELD_REF_SEQUENCE, | |
861 | [ BYTECODE_OP_LOAD_FIELD_REF_S64 ] = &&LABEL_BYTECODE_OP_LOAD_FIELD_REF_S64, | |
862 | [ BYTECODE_OP_LOAD_FIELD_REF_DOUBLE ] = &&LABEL_BYTECODE_OP_LOAD_FIELD_REF_DOUBLE, | |
07dfc1d0 MD |
863 | |
864 | /* load from immediate operand */ | |
80c2a69a FD |
865 | [ BYTECODE_OP_LOAD_STRING ] = &&LABEL_BYTECODE_OP_LOAD_STRING, |
866 | [ BYTECODE_OP_LOAD_STAR_GLOB_STRING ] = &&LABEL_BYTECODE_OP_LOAD_STAR_GLOB_STRING, | |
867 | [ BYTECODE_OP_LOAD_S64 ] = &&LABEL_BYTECODE_OP_LOAD_S64, | |
868 | [ BYTECODE_OP_LOAD_DOUBLE ] = &&LABEL_BYTECODE_OP_LOAD_DOUBLE, | |
07dfc1d0 MD |
869 | |
870 | /* cast */ | |
80c2a69a FD |
871 | [ BYTECODE_OP_CAST_TO_S64 ] = &&LABEL_BYTECODE_OP_CAST_TO_S64, |
872 | [ BYTECODE_OP_CAST_DOUBLE_TO_S64 ] = &&LABEL_BYTECODE_OP_CAST_DOUBLE_TO_S64, | |
873 | [ BYTECODE_OP_CAST_NOP ] = &&LABEL_BYTECODE_OP_CAST_NOP, | |
07dfc1d0 MD |
874 | |
875 | /* get context ref */ | |
80c2a69a FD |
876 | [ BYTECODE_OP_GET_CONTEXT_REF ] = &&LABEL_BYTECODE_OP_GET_CONTEXT_REF, |
877 | [ BYTECODE_OP_GET_CONTEXT_REF_STRING ] = &&LABEL_BYTECODE_OP_GET_CONTEXT_REF_STRING, | |
878 | [ BYTECODE_OP_GET_CONTEXT_REF_S64 ] = &&LABEL_BYTECODE_OP_GET_CONTEXT_REF_S64, | |
879 | [ BYTECODE_OP_GET_CONTEXT_REF_DOUBLE ] = &&LABEL_BYTECODE_OP_GET_CONTEXT_REF_DOUBLE, | |
f127e61e MD |
880 | |
881 | /* load userspace field ref */ | |
80c2a69a FD |
882 | [ BYTECODE_OP_LOAD_FIELD_REF_USER_STRING ] = &&LABEL_BYTECODE_OP_LOAD_FIELD_REF_USER_STRING, |
883 | [ BYTECODE_OP_LOAD_FIELD_REF_USER_SEQUENCE ] = &&LABEL_BYTECODE_OP_LOAD_FIELD_REF_USER_SEQUENCE, | |
3834b99f MD |
884 | |
885 | /* Instructions for recursive traversal through composed types. */ | |
80c2a69a FD |
886 | [ BYTECODE_OP_GET_CONTEXT_ROOT ] = &&LABEL_BYTECODE_OP_GET_CONTEXT_ROOT, |
887 | [ BYTECODE_OP_GET_APP_CONTEXT_ROOT ] = &&LABEL_BYTECODE_OP_GET_APP_CONTEXT_ROOT, | |
888 | [ BYTECODE_OP_GET_PAYLOAD_ROOT ] = &&LABEL_BYTECODE_OP_GET_PAYLOAD_ROOT, | |
889 | ||
890 | [ BYTECODE_OP_GET_SYMBOL ] = &&LABEL_BYTECODE_OP_GET_SYMBOL, | |
891 | [ BYTECODE_OP_GET_SYMBOL_FIELD ] = &&LABEL_BYTECODE_OP_GET_SYMBOL_FIELD, | |
892 | [ BYTECODE_OP_GET_INDEX_U16 ] = &&LABEL_BYTECODE_OP_GET_INDEX_U16, | |
893 | [ BYTECODE_OP_GET_INDEX_U64 ] = &&LABEL_BYTECODE_OP_GET_INDEX_U64, | |
894 | ||
895 | [ BYTECODE_OP_LOAD_FIELD ] = &&LABEL_BYTECODE_OP_LOAD_FIELD, | |
896 | [ BYTECODE_OP_LOAD_FIELD_S8 ] = &&LABEL_BYTECODE_OP_LOAD_FIELD_S8, | |
897 | [ BYTECODE_OP_LOAD_FIELD_S16 ] = &&LABEL_BYTECODE_OP_LOAD_FIELD_S16, | |
898 | [ BYTECODE_OP_LOAD_FIELD_S32 ] = &&LABEL_BYTECODE_OP_LOAD_FIELD_S32, | |
899 | [ BYTECODE_OP_LOAD_FIELD_S64 ] = &&LABEL_BYTECODE_OP_LOAD_FIELD_S64, | |
900 | [ BYTECODE_OP_LOAD_FIELD_U8 ] = &&LABEL_BYTECODE_OP_LOAD_FIELD_U8, | |
901 | [ BYTECODE_OP_LOAD_FIELD_U16 ] = &&LABEL_BYTECODE_OP_LOAD_FIELD_U16, | |
902 | [ BYTECODE_OP_LOAD_FIELD_U32 ] = &&LABEL_BYTECODE_OP_LOAD_FIELD_U32, | |
903 | [ BYTECODE_OP_LOAD_FIELD_U64 ] = &&LABEL_BYTECODE_OP_LOAD_FIELD_U64, | |
904 | [ BYTECODE_OP_LOAD_FIELD_STRING ] = &&LABEL_BYTECODE_OP_LOAD_FIELD_STRING, | |
905 | [ BYTECODE_OP_LOAD_FIELD_SEQUENCE ] = &&LABEL_BYTECODE_OP_LOAD_FIELD_SEQUENCE, | |
906 | [ BYTECODE_OP_LOAD_FIELD_DOUBLE ] = &&LABEL_BYTECODE_OP_LOAD_FIELD_DOUBLE, | |
907 | ||
908 | [ BYTECODE_OP_UNARY_BIT_NOT ] = &&LABEL_BYTECODE_OP_UNARY_BIT_NOT, | |
909 | ||
910 | [ BYTECODE_OP_RETURN_S64 ] = &&LABEL_BYTECODE_OP_RETURN_S64, | |
07dfc1d0 MD |
911 | }; |
912 | #endif /* #ifndef INTERPRETER_USE_SWITCH */ | |
913 | ||
914 | START_OP | |
915 | ||
80c2a69a FD |
916 | OP(BYTECODE_OP_UNKNOWN): |
917 | OP(BYTECODE_OP_LOAD_FIELD_REF): | |
918 | OP(BYTECODE_OP_GET_CONTEXT_REF): | |
07dfc1d0 MD |
919 | #ifdef INTERPRETER_USE_SWITCH |
920 | default: | |
921 | #endif /* INTERPRETER_USE_SWITCH */ | |
80c2a69a FD |
922 | printk(KERN_WARNING "LTTng: bytecode: unknown bytecode op %u\n", |
923 | (unsigned int) *(bytecode_opcode_t *) pc); | |
07dfc1d0 MD |
924 | ret = -EINVAL; |
925 | goto end; | |
926 | ||
80c2a69a | 927 | OP(BYTECODE_OP_RETURN): |
8a445457 | 928 | /* LTTNG_KERNEL_BYTECODE_INTERPRETER_ERROR or LTTNG_KERNEL_BYTECODE_INTERPRETER_OK */ |
d644d1df FD |
929 | switch (estack_ax_t) { |
930 | case REG_S64: | |
1242217a | 931 | case REG_U64: |
d644d1df FD |
932 | retval = !!estack_ax_v; |
933 | break; | |
934 | case REG_DOUBLE: | |
935 | case REG_STRING: | |
936 | case REG_PTR: | |
8a445457 | 937 | if (kernel_bytecode->type != LTTNG_KERNEL_BYTECODE_TYPE_CAPTURE) { |
03cb0cdd FD |
938 | ret = -EINVAL; |
939 | goto end; | |
940 | } | |
941 | retval = 0; | |
942 | break; | |
d644d1df FD |
943 | case REG_STAR_GLOB_STRING: |
944 | case REG_TYPE_UNKNOWN: | |
945 | ret = -EINVAL; | |
946 | goto end; | |
947 | } | |
07dfc1d0 MD |
948 | ret = 0; |
949 | goto end; | |
950 | ||
8a445457 MD |
951 | OP(BYTECODE_OP_RETURN_S64): |
952 | /* LTTNG_KERNEL_BYTECODE_INTERPRETER_ERROR or LTTNG_KERNEL_BYTECODE_INTERPRETER_OK */ | |
953 | retval = !!estack_ax_v; | |
954 | ret = 0; | |
955 | goto end; | |
956 | ||
07dfc1d0 | 957 | /* binary */ |
80c2a69a FD |
958 | OP(BYTECODE_OP_MUL): |
959 | OP(BYTECODE_OP_DIV): | |
960 | OP(BYTECODE_OP_MOD): | |
961 | OP(BYTECODE_OP_PLUS): | |
962 | OP(BYTECODE_OP_MINUS): | |
963 | printk(KERN_WARNING "LTTng: bytecode: unsupported bytecode op %u\n", | |
964 | (unsigned int) *(bytecode_opcode_t *) pc); | |
07dfc1d0 MD |
965 | ret = -EINVAL; |
966 | goto end; | |
967 | ||
80c2a69a FD |
968 | OP(BYTECODE_OP_EQ): |
969 | OP(BYTECODE_OP_NE): | |
970 | OP(BYTECODE_OP_GT): | |
971 | OP(BYTECODE_OP_LT): | |
972 | OP(BYTECODE_OP_GE): | |
973 | OP(BYTECODE_OP_LE): | |
974 | printk(KERN_WARNING "LTTng: bytecode: unsupported non-specialized bytecode op %u\n", | |
975 | (unsigned int) *(bytecode_opcode_t *) pc); | |
07dfc1d0 MD |
976 | ret = -EINVAL; |
977 | goto end; | |
978 | ||
80c2a69a | 979 | OP(BYTECODE_OP_EQ_STRING): |
07dfc1d0 MD |
980 | { |
981 | int res; | |
982 | ||
983 | res = (stack_strcmp(stack, top, "==") == 0); | |
d644d1df | 984 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 985 | estack_ax_v = res; |
d644d1df | 986 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
987 | next_pc += sizeof(struct binary_op); |
988 | PO; | |
989 | } | |
80c2a69a | 990 | OP(BYTECODE_OP_NE_STRING): |
07dfc1d0 MD |
991 | { |
992 | int res; | |
993 | ||
994 | res = (stack_strcmp(stack, top, "!=") != 0); | |
d644d1df | 995 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 996 | estack_ax_v = res; |
d644d1df | 997 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
998 | next_pc += sizeof(struct binary_op); |
999 | PO; | |
1000 | } | |
80c2a69a | 1001 | OP(BYTECODE_OP_GT_STRING): |
07dfc1d0 MD |
1002 | { |
1003 | int res; | |
1004 | ||
1005 | res = (stack_strcmp(stack, top, ">") > 0); | |
d644d1df | 1006 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 1007 | estack_ax_v = res; |
d644d1df | 1008 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
1009 | next_pc += sizeof(struct binary_op); |
1010 | PO; | |
1011 | } | |
80c2a69a | 1012 | OP(BYTECODE_OP_LT_STRING): |
07dfc1d0 MD |
1013 | { |
1014 | int res; | |
1015 | ||
1016 | res = (stack_strcmp(stack, top, "<") < 0); | |
d644d1df | 1017 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 1018 | estack_ax_v = res; |
d644d1df | 1019 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
1020 | next_pc += sizeof(struct binary_op); |
1021 | PO; | |
1022 | } | |
80c2a69a | 1023 | OP(BYTECODE_OP_GE_STRING): |
07dfc1d0 MD |
1024 | { |
1025 | int res; | |
1026 | ||
1027 | res = (stack_strcmp(stack, top, ">=") >= 0); | |
d644d1df | 1028 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 1029 | estack_ax_v = res; |
d644d1df | 1030 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
1031 | next_pc += sizeof(struct binary_op); |
1032 | PO; | |
1033 | } | |
80c2a69a | 1034 | OP(BYTECODE_OP_LE_STRING): |
07dfc1d0 MD |
1035 | { |
1036 | int res; | |
1037 | ||
1038 | res = (stack_strcmp(stack, top, "<=") <= 0); | |
d644d1df | 1039 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 1040 | estack_ax_v = res; |
d644d1df | 1041 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
1042 | next_pc += sizeof(struct binary_op); |
1043 | PO; | |
1044 | } | |
1045 | ||
80c2a69a | 1046 | OP(BYTECODE_OP_EQ_STAR_GLOB_STRING): |
02aca193 PP |
1047 | { |
1048 | int res; | |
1049 | ||
1050 | res = (stack_star_glob_match(stack, top, "==") == 0); | |
d644d1df | 1051 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
02aca193 | 1052 | estack_ax_v = res; |
d644d1df | 1053 | estack_ax_t = REG_S64; |
02aca193 PP |
1054 | next_pc += sizeof(struct binary_op); |
1055 | PO; | |
1056 | } | |
80c2a69a | 1057 | OP(BYTECODE_OP_NE_STAR_GLOB_STRING): |
02aca193 PP |
1058 | { |
1059 | int res; | |
1060 | ||
1061 | res = (stack_star_glob_match(stack, top, "!=") != 0); | |
d644d1df | 1062 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
02aca193 | 1063 | estack_ax_v = res; |
d644d1df | 1064 | estack_ax_t = REG_S64; |
02aca193 PP |
1065 | next_pc += sizeof(struct binary_op); |
1066 | PO; | |
1067 | } | |
1068 | ||
80c2a69a | 1069 | OP(BYTECODE_OP_EQ_S64): |
07dfc1d0 MD |
1070 | { |
1071 | int res; | |
1072 | ||
1073 | res = (estack_bx_v == estack_ax_v); | |
d644d1df | 1074 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 1075 | estack_ax_v = res; |
d644d1df | 1076 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
1077 | next_pc += sizeof(struct binary_op); |
1078 | PO; | |
1079 | } | |
80c2a69a | 1080 | OP(BYTECODE_OP_NE_S64): |
07dfc1d0 MD |
1081 | { |
1082 | int res; | |
1083 | ||
1084 | res = (estack_bx_v != estack_ax_v); | |
d644d1df | 1085 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 1086 | estack_ax_v = res; |
d644d1df | 1087 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
1088 | next_pc += sizeof(struct binary_op); |
1089 | PO; | |
1090 | } | |
80c2a69a | 1091 | OP(BYTECODE_OP_GT_S64): |
07dfc1d0 MD |
1092 | { |
1093 | int res; | |
1094 | ||
1095 | res = (estack_bx_v > estack_ax_v); | |
d644d1df | 1096 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 1097 | estack_ax_v = res; |
d644d1df | 1098 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
1099 | next_pc += sizeof(struct binary_op); |
1100 | PO; | |
1101 | } | |
80c2a69a | 1102 | OP(BYTECODE_OP_LT_S64): |
07dfc1d0 MD |
1103 | { |
1104 | int res; | |
1105 | ||
1106 | res = (estack_bx_v < estack_ax_v); | |
d644d1df | 1107 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 1108 | estack_ax_v = res; |
d644d1df | 1109 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
1110 | next_pc += sizeof(struct binary_op); |
1111 | PO; | |
1112 | } | |
80c2a69a | 1113 | OP(BYTECODE_OP_GE_S64): |
07dfc1d0 MD |
1114 | { |
1115 | int res; | |
1116 | ||
1117 | res = (estack_bx_v >= estack_ax_v); | |
d644d1df | 1118 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 1119 | estack_ax_v = res; |
d644d1df | 1120 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
1121 | next_pc += sizeof(struct binary_op); |
1122 | PO; | |
1123 | } | |
80c2a69a | 1124 | OP(BYTECODE_OP_LE_S64): |
07dfc1d0 MD |
1125 | { |
1126 | int res; | |
1127 | ||
1128 | res = (estack_bx_v <= estack_ax_v); | |
d644d1df | 1129 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 1130 | estack_ax_v = res; |
d644d1df | 1131 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
1132 | next_pc += sizeof(struct binary_op); |
1133 | PO; | |
1134 | } | |
1135 | ||
80c2a69a FD |
1136 | OP(BYTECODE_OP_EQ_DOUBLE): |
1137 | OP(BYTECODE_OP_NE_DOUBLE): | |
1138 | OP(BYTECODE_OP_GT_DOUBLE): | |
1139 | OP(BYTECODE_OP_LT_DOUBLE): | |
1140 | OP(BYTECODE_OP_GE_DOUBLE): | |
1141 | OP(BYTECODE_OP_LE_DOUBLE): | |
07dfc1d0 MD |
1142 | { |
1143 | BUG_ON(1); | |
1144 | PO; | |
1145 | } | |
1146 | ||
1147 | /* Mixed S64-double binary comparators */ | |
80c2a69a FD |
1148 | OP(BYTECODE_OP_EQ_DOUBLE_S64): |
1149 | OP(BYTECODE_OP_NE_DOUBLE_S64): | |
1150 | OP(BYTECODE_OP_GT_DOUBLE_S64): | |
1151 | OP(BYTECODE_OP_LT_DOUBLE_S64): | |
1152 | OP(BYTECODE_OP_GE_DOUBLE_S64): | |
1153 | OP(BYTECODE_OP_LE_DOUBLE_S64): | |
1154 | OP(BYTECODE_OP_EQ_S64_DOUBLE): | |
1155 | OP(BYTECODE_OP_NE_S64_DOUBLE): | |
1156 | OP(BYTECODE_OP_GT_S64_DOUBLE): | |
1157 | OP(BYTECODE_OP_LT_S64_DOUBLE): | |
1158 | OP(BYTECODE_OP_GE_S64_DOUBLE): | |
1159 | OP(BYTECODE_OP_LE_S64_DOUBLE): | |
07dfc1d0 MD |
1160 | { |
1161 | BUG_ON(1); | |
1162 | PO; | |
1163 | } | |
80c2a69a | 1164 | OP(BYTECODE_OP_BIT_RSHIFT): |
e16c054b MD |
1165 | { |
1166 | int64_t res; | |
1167 | ||
d644d1df FD |
1168 | if (!IS_INTEGER_REGISTER(estack_ax_t) || !IS_INTEGER_REGISTER(estack_bx_t)) { |
1169 | ret = -EINVAL; | |
1170 | goto end; | |
1171 | } | |
1172 | ||
ea13ec96 MD |
1173 | /* Catch undefined behavior. */ |
1174 | if (unlikely(estack_ax_v < 0 || estack_ax_v >= 64)) { | |
1175 | ret = -EINVAL; | |
1176 | goto end; | |
1177 | } | |
f8d42740 | 1178 | res = ((uint64_t) estack_bx_v >> (uint32_t) estack_ax_v); |
d644d1df | 1179 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
e16c054b | 1180 | estack_ax_v = res; |
1242217a | 1181 | estack_ax_t = REG_U64; |
e16c054b MD |
1182 | next_pc += sizeof(struct binary_op); |
1183 | PO; | |
1184 | } | |
80c2a69a | 1185 | OP(BYTECODE_OP_BIT_LSHIFT): |
e16c054b MD |
1186 | { |
1187 | int64_t res; | |
1188 | ||
d644d1df FD |
1189 | if (!IS_INTEGER_REGISTER(estack_ax_t) || !IS_INTEGER_REGISTER(estack_bx_t)) { |
1190 | ret = -EINVAL; | |
1191 | goto end; | |
1192 | } | |
1193 | ||
ea13ec96 MD |
1194 | /* Catch undefined behavior. */ |
1195 | if (unlikely(estack_ax_v < 0 || estack_ax_v >= 64)) { | |
1196 | ret = -EINVAL; | |
1197 | goto end; | |
1198 | } | |
f8d42740 | 1199 | res = ((uint64_t) estack_bx_v << (uint32_t) estack_ax_v); |
d644d1df | 1200 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
e16c054b | 1201 | estack_ax_v = res; |
1242217a | 1202 | estack_ax_t = REG_U64; |
e16c054b MD |
1203 | next_pc += sizeof(struct binary_op); |
1204 | PO; | |
1205 | } | |
80c2a69a | 1206 | OP(BYTECODE_OP_BIT_AND): |
3834b99f MD |
1207 | { |
1208 | int64_t res; | |
1209 | ||
d644d1df FD |
1210 | if (!IS_INTEGER_REGISTER(estack_ax_t) || !IS_INTEGER_REGISTER(estack_bx_t)) { |
1211 | ret = -EINVAL; | |
1212 | goto end; | |
1213 | } | |
1214 | ||
f8d42740 | 1215 | res = ((uint64_t) estack_bx_v & (uint64_t) estack_ax_v); |
d644d1df | 1216 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
3834b99f | 1217 | estack_ax_v = res; |
1242217a | 1218 | estack_ax_t = REG_U64; |
3834b99f MD |
1219 | next_pc += sizeof(struct binary_op); |
1220 | PO; | |
1221 | } | |
80c2a69a | 1222 | OP(BYTECODE_OP_BIT_OR): |
3834b99f MD |
1223 | { |
1224 | int64_t res; | |
1225 | ||
d644d1df FD |
1226 | if (!IS_INTEGER_REGISTER(estack_ax_t) || !IS_INTEGER_REGISTER(estack_bx_t)) { |
1227 | ret = -EINVAL; | |
1228 | goto end; | |
1229 | } | |
1230 | ||
f8d42740 | 1231 | res = ((uint64_t) estack_bx_v | (uint64_t) estack_ax_v); |
d644d1df | 1232 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
3834b99f | 1233 | estack_ax_v = res; |
1242217a | 1234 | estack_ax_t = REG_U64; |
3834b99f MD |
1235 | next_pc += sizeof(struct binary_op); |
1236 | PO; | |
1237 | } | |
80c2a69a | 1238 | OP(BYTECODE_OP_BIT_XOR): |
3834b99f MD |
1239 | { |
1240 | int64_t res; | |
1241 | ||
d644d1df FD |
1242 | if (!IS_INTEGER_REGISTER(estack_ax_t) || !IS_INTEGER_REGISTER(estack_bx_t)) { |
1243 | ret = -EINVAL; | |
1244 | goto end; | |
1245 | } | |
1246 | ||
f8d42740 | 1247 | res = ((uint64_t) estack_bx_v ^ (uint64_t) estack_ax_v); |
d644d1df | 1248 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
3834b99f | 1249 | estack_ax_v = res; |
1242217a | 1250 | estack_ax_t = REG_U64; |
3834b99f MD |
1251 | next_pc += sizeof(struct binary_op); |
1252 | PO; | |
1253 | } | |
07dfc1d0 MD |
1254 | |
1255 | /* unary */ | |
80c2a69a FD |
1256 | OP(BYTECODE_OP_UNARY_PLUS): |
1257 | OP(BYTECODE_OP_UNARY_MINUS): | |
1258 | OP(BYTECODE_OP_UNARY_NOT): | |
1259 | printk(KERN_WARNING "LTTng: bytecode: unsupported non-specialized bytecode op %u\n", | |
1260 | (unsigned int) *(bytecode_opcode_t *) pc); | |
07dfc1d0 MD |
1261 | ret = -EINVAL; |
1262 | goto end; | |
1263 | ||
1264 | ||
80c2a69a | 1265 | OP(BYTECODE_OP_UNARY_BIT_NOT): |
e16c054b | 1266 | { |
f8d42740 | 1267 | estack_ax_v = ~(uint64_t) estack_ax_v; |
d644d1df | 1268 | estack_ax_t = REG_S64; |
e16c054b MD |
1269 | next_pc += sizeof(struct unary_op); |
1270 | PO; | |
1271 | } | |
1272 | ||
80c2a69a | 1273 | OP(BYTECODE_OP_UNARY_PLUS_S64): |
07dfc1d0 MD |
1274 | { |
1275 | next_pc += sizeof(struct unary_op); | |
1276 | PO; | |
1277 | } | |
80c2a69a | 1278 | OP(BYTECODE_OP_UNARY_MINUS_S64): |
07dfc1d0 MD |
1279 | { |
1280 | estack_ax_v = -estack_ax_v; | |
d644d1df | 1281 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
1282 | next_pc += sizeof(struct unary_op); |
1283 | PO; | |
1284 | } | |
80c2a69a FD |
1285 | OP(BYTECODE_OP_UNARY_PLUS_DOUBLE): |
1286 | OP(BYTECODE_OP_UNARY_MINUS_DOUBLE): | |
07dfc1d0 MD |
1287 | { |
1288 | BUG_ON(1); | |
1289 | PO; | |
1290 | } | |
80c2a69a | 1291 | OP(BYTECODE_OP_UNARY_NOT_S64): |
07dfc1d0 MD |
1292 | { |
1293 | estack_ax_v = !estack_ax_v; | |
d644d1df | 1294 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
1295 | next_pc += sizeof(struct unary_op); |
1296 | PO; | |
1297 | } | |
80c2a69a | 1298 | OP(BYTECODE_OP_UNARY_NOT_DOUBLE): |
07dfc1d0 MD |
1299 | { |
1300 | BUG_ON(1); | |
1301 | PO; | |
1302 | } | |
1303 | ||
1304 | /* logical */ | |
80c2a69a | 1305 | OP(BYTECODE_OP_AND): |
07dfc1d0 MD |
1306 | { |
1307 | struct logical_op *insn = (struct logical_op *) pc; | |
1308 | ||
1309 | /* If AX is 0, skip and evaluate to 0 */ | |
1310 | if (unlikely(estack_ax_v == 0)) { | |
1311 | dbg_printk("Jumping to bytecode offset %u\n", | |
1312 | (unsigned int) insn->skip_offset); | |
1313 | next_pc = start_pc + insn->skip_offset; | |
1314 | } else { | |
1315 | /* Pop 1 when jump not taken */ | |
d644d1df | 1316 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 MD |
1317 | next_pc += sizeof(struct logical_op); |
1318 | } | |
1319 | PO; | |
1320 | } | |
80c2a69a | 1321 | OP(BYTECODE_OP_OR): |
07dfc1d0 MD |
1322 | { |
1323 | struct logical_op *insn = (struct logical_op *) pc; | |
1324 | ||
1325 | /* If AX is nonzero, skip and evaluate to 1 */ | |
1326 | ||
1327 | if (unlikely(estack_ax_v != 0)) { | |
1328 | estack_ax_v = 1; | |
1329 | dbg_printk("Jumping to bytecode offset %u\n", | |
1330 | (unsigned int) insn->skip_offset); | |
1331 | next_pc = start_pc + insn->skip_offset; | |
1332 | } else { | |
1333 | /* Pop 1 when jump not taken */ | |
d644d1df | 1334 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 MD |
1335 | next_pc += sizeof(struct logical_op); |
1336 | } | |
1337 | PO; | |
1338 | } | |
1339 | ||
1340 | ||
1341 | /* load field ref */ | |
80c2a69a | 1342 | OP(BYTECODE_OP_LOAD_FIELD_REF_STRING): |
07dfc1d0 MD |
1343 | { |
1344 | struct load_op *insn = (struct load_op *) pc; | |
1345 | struct field_ref *ref = (struct field_ref *) insn->data; | |
1346 | ||
1347 | dbg_printk("load field ref offset %u type string\n", | |
1348 | ref->offset); | |
d644d1df | 1349 | estack_push(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 1350 | estack_ax(stack, top)->u.s.str = |
03cb0cdd | 1351 | *(const char * const *) &interpreter_stack_data[ref->offset]; |
07dfc1d0 | 1352 | if (unlikely(!estack_ax(stack, top)->u.s.str)) { |
80c2a69a | 1353 | dbg_printk("Bytecode warning: loading a NULL string.\n"); |
07dfc1d0 MD |
1354 | ret = -EINVAL; |
1355 | goto end; | |
1356 | } | |
cbc19040 | 1357 | estack_ax(stack, top)->u.s.seq_len = LTTNG_SIZE_MAX; |
02aca193 PP |
1358 | estack_ax(stack, top)->u.s.literal_type = |
1359 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
f127e61e | 1360 | estack_ax(stack, top)->u.s.user = 0; |
d644d1df | 1361 | estack_ax(stack, top)->type = REG_STRING; |
07dfc1d0 MD |
1362 | dbg_printk("ref load string %s\n", estack_ax(stack, top)->u.s.str); |
1363 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
1364 | PO; | |
1365 | } | |
1366 | ||
80c2a69a | 1367 | OP(BYTECODE_OP_LOAD_FIELD_REF_SEQUENCE): |
07dfc1d0 MD |
1368 | { |
1369 | struct load_op *insn = (struct load_op *) pc; | |
1370 | struct field_ref *ref = (struct field_ref *) insn->data; | |
1371 | ||
1372 | dbg_printk("load field ref offset %u type sequence\n", | |
1373 | ref->offset); | |
d644d1df | 1374 | estack_push(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 1375 | estack_ax(stack, top)->u.s.seq_len = |
03cb0cdd | 1376 | *(unsigned long *) &interpreter_stack_data[ref->offset]; |
07dfc1d0 | 1377 | estack_ax(stack, top)->u.s.str = |
03cb0cdd | 1378 | *(const char **) (&interpreter_stack_data[ref->offset |
07dfc1d0 MD |
1379 | + sizeof(unsigned long)]); |
1380 | if (unlikely(!estack_ax(stack, top)->u.s.str)) { | |
80c2a69a | 1381 | dbg_printk("Bytecode warning: loading a NULL sequence.\n"); |
07dfc1d0 MD |
1382 | ret = -EINVAL; |
1383 | goto end; | |
1384 | } | |
02aca193 PP |
1385 | estack_ax(stack, top)->u.s.literal_type = |
1386 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
f127e61e | 1387 | estack_ax(stack, top)->u.s.user = 0; |
07dfc1d0 MD |
1388 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); |
1389 | PO; | |
1390 | } | |
1391 | ||
80c2a69a | 1392 | OP(BYTECODE_OP_LOAD_FIELD_REF_S64): |
07dfc1d0 MD |
1393 | { |
1394 | struct load_op *insn = (struct load_op *) pc; | |
1395 | struct field_ref *ref = (struct field_ref *) insn->data; | |
1396 | ||
1397 | dbg_printk("load field ref offset %u type s64\n", | |
1398 | ref->offset); | |
d644d1df | 1399 | estack_push(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 1400 | estack_ax_v = |
03cb0cdd | 1401 | ((struct literal_numeric *) &interpreter_stack_data[ref->offset])->v; |
d644d1df | 1402 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
1403 | dbg_printk("ref load s64 %lld\n", |
1404 | (long long) estack_ax_v); | |
1405 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
1406 | PO; | |
1407 | } | |
1408 | ||
80c2a69a | 1409 | OP(BYTECODE_OP_LOAD_FIELD_REF_DOUBLE): |
07dfc1d0 MD |
1410 | { |
1411 | BUG_ON(1); | |
1412 | PO; | |
1413 | } | |
1414 | ||
1415 | /* load from immediate operand */ | |
80c2a69a | 1416 | OP(BYTECODE_OP_LOAD_STRING): |
07dfc1d0 MD |
1417 | { |
1418 | struct load_op *insn = (struct load_op *) pc; | |
1419 | ||
1420 | dbg_printk("load string %s\n", insn->data); | |
d644d1df | 1421 | estack_push(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 1422 | estack_ax(stack, top)->u.s.str = insn->data; |
cbc19040 | 1423 | estack_ax(stack, top)->u.s.seq_len = LTTNG_SIZE_MAX; |
02aca193 PP |
1424 | estack_ax(stack, top)->u.s.literal_type = |
1425 | ESTACK_STRING_LITERAL_TYPE_PLAIN; | |
1426 | estack_ax(stack, top)->u.s.user = 0; | |
1427 | next_pc += sizeof(struct load_op) + strlen(insn->data) + 1; | |
1428 | PO; | |
1429 | } | |
1430 | ||
80c2a69a | 1431 | OP(BYTECODE_OP_LOAD_STAR_GLOB_STRING): |
02aca193 PP |
1432 | { |
1433 | struct load_op *insn = (struct load_op *) pc; | |
1434 | ||
1435 | dbg_printk("load globbing pattern %s\n", insn->data); | |
d644d1df | 1436 | estack_push(stack, top, ax, bx, ax_t, bx_t); |
02aca193 | 1437 | estack_ax(stack, top)->u.s.str = insn->data; |
cbc19040 | 1438 | estack_ax(stack, top)->u.s.seq_len = LTTNG_SIZE_MAX; |
02aca193 PP |
1439 | estack_ax(stack, top)->u.s.literal_type = |
1440 | ESTACK_STRING_LITERAL_TYPE_STAR_GLOB; | |
f127e61e | 1441 | estack_ax(stack, top)->u.s.user = 0; |
07dfc1d0 MD |
1442 | next_pc += sizeof(struct load_op) + strlen(insn->data) + 1; |
1443 | PO; | |
1444 | } | |
1445 | ||
80c2a69a | 1446 | OP(BYTECODE_OP_LOAD_S64): |
07dfc1d0 MD |
1447 | { |
1448 | struct load_op *insn = (struct load_op *) pc; | |
1449 | ||
d644d1df | 1450 | estack_push(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 1451 | estack_ax_v = ((struct literal_numeric *) insn->data)->v; |
d644d1df | 1452 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
1453 | dbg_printk("load s64 %lld\n", |
1454 | (long long) estack_ax_v); | |
1455 | next_pc += sizeof(struct load_op) | |
1456 | + sizeof(struct literal_numeric); | |
1457 | PO; | |
1458 | } | |
1459 | ||
80c2a69a | 1460 | OP(BYTECODE_OP_LOAD_DOUBLE): |
07dfc1d0 MD |
1461 | { |
1462 | BUG_ON(1); | |
1463 | PO; | |
1464 | } | |
1465 | ||
1466 | /* cast */ | |
80c2a69a FD |
1467 | OP(BYTECODE_OP_CAST_TO_S64): |
1468 | printk(KERN_WARNING "LTTng: bytecode: unsupported non-specialized bytecode op %u\n", | |
1469 | (unsigned int) *(bytecode_opcode_t *) pc); | |
07dfc1d0 MD |
1470 | ret = -EINVAL; |
1471 | goto end; | |
1472 | ||
80c2a69a | 1473 | OP(BYTECODE_OP_CAST_DOUBLE_TO_S64): |
07dfc1d0 MD |
1474 | { |
1475 | BUG_ON(1); | |
1476 | PO; | |
1477 | } | |
1478 | ||
80c2a69a | 1479 | OP(BYTECODE_OP_CAST_NOP): |
07dfc1d0 MD |
1480 | { |
1481 | next_pc += sizeof(struct cast_op); | |
1482 | PO; | |
1483 | } | |
1484 | ||
1485 | /* get context ref */ | |
80c2a69a | 1486 | OP(BYTECODE_OP_GET_CONTEXT_REF_STRING): |
07dfc1d0 MD |
1487 | { |
1488 | struct load_op *insn = (struct load_op *) pc; | |
1489 | struct field_ref *ref = (struct field_ref *) insn->data; | |
437d5aa5 | 1490 | struct lttng_kernel_ctx_field *ctx_field; |
ea2d95e4 | 1491 | struct lttng_ctx_value v; |
07dfc1d0 MD |
1492 | |
1493 | dbg_printk("get context ref offset %u type string\n", | |
1494 | ref->offset); | |
1495 | ctx_field = <tng_static_ctx->fields[ref->offset]; | |
ea2d95e4 | 1496 | ctx_field->get_value(ctx_field->priv, lttng_probe_ctx, &v); |
d644d1df | 1497 | estack_push(stack, top, ax, bx, ax_t, bx_t); |
ea2d95e4 | 1498 | estack_ax(stack, top)->u.s.str = v.u.str; |
07dfc1d0 | 1499 | if (unlikely(!estack_ax(stack, top)->u.s.str)) { |
80c2a69a | 1500 | dbg_printk("Bytecode warning: loading a NULL string.\n"); |
07dfc1d0 MD |
1501 | ret = -EINVAL; |
1502 | goto end; | |
1503 | } | |
cbc19040 | 1504 | estack_ax(stack, top)->u.s.seq_len = LTTNG_SIZE_MAX; |
02aca193 PP |
1505 | estack_ax(stack, top)->u.s.literal_type = |
1506 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
f127e61e | 1507 | estack_ax(stack, top)->u.s.user = 0; |
d644d1df | 1508 | estack_ax(stack, top)->type = REG_STRING; |
07dfc1d0 MD |
1509 | dbg_printk("ref get context string %s\n", estack_ax(stack, top)->u.s.str); |
1510 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
1511 | PO; | |
1512 | } | |
1513 | ||
80c2a69a | 1514 | OP(BYTECODE_OP_GET_CONTEXT_REF_S64): |
07dfc1d0 MD |
1515 | { |
1516 | struct load_op *insn = (struct load_op *) pc; | |
1517 | struct field_ref *ref = (struct field_ref *) insn->data; | |
437d5aa5 | 1518 | struct lttng_kernel_ctx_field *ctx_field; |
ea2d95e4 | 1519 | struct lttng_ctx_value v; |
07dfc1d0 MD |
1520 | |
1521 | dbg_printk("get context ref offset %u type s64\n", | |
1522 | ref->offset); | |
1523 | ctx_field = <tng_static_ctx->fields[ref->offset]; | |
ea2d95e4 | 1524 | ctx_field->get_value(ctx_field->priv, lttng_probe_ctx, &v); |
d644d1df | 1525 | estack_push(stack, top, ax, bx, ax_t, bx_t); |
ea2d95e4 | 1526 | estack_ax_v = v.u.s64; |
d644d1df | 1527 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
1528 | dbg_printk("ref get context s64 %lld\n", |
1529 | (long long) estack_ax_v); | |
1530 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
1531 | PO; | |
1532 | } | |
1533 | ||
80c2a69a | 1534 | OP(BYTECODE_OP_GET_CONTEXT_REF_DOUBLE): |
07dfc1d0 MD |
1535 | { |
1536 | BUG_ON(1); | |
1537 | PO; | |
1538 | } | |
1539 | ||
f127e61e | 1540 | /* load userspace field ref */ |
80c2a69a | 1541 | OP(BYTECODE_OP_LOAD_FIELD_REF_USER_STRING): |
f127e61e MD |
1542 | { |
1543 | struct load_op *insn = (struct load_op *) pc; | |
1544 | struct field_ref *ref = (struct field_ref *) insn->data; | |
1545 | ||
1546 | dbg_printk("load field ref offset %u type user string\n", | |
1547 | ref->offset); | |
d644d1df | 1548 | estack_push(stack, top, ax, bx, ax_t, bx_t); |
5b4ad89f | 1549 | estack_ax(stack, top)->u.s.user_str = |
03cb0cdd | 1550 | *(const char * const *) &interpreter_stack_data[ref->offset]; |
acbe9250 | 1551 | if (unlikely(!estack_ax(stack, top)->u.s.user_str)) { |
80c2a69a | 1552 | dbg_printk("Bytecode warning: loading a NULL string.\n"); |
f127e61e MD |
1553 | ret = -EINVAL; |
1554 | goto end; | |
1555 | } | |
cbc19040 | 1556 | estack_ax(stack, top)->u.s.seq_len = LTTNG_SIZE_MAX; |
02aca193 PP |
1557 | estack_ax(stack, top)->u.s.literal_type = |
1558 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
f127e61e | 1559 | estack_ax(stack, top)->u.s.user = 1; |
d644d1df | 1560 | estack_ax(stack, top)->type = REG_STRING; |
acbe9250 | 1561 | dbg_load_ref_user_str_printk(estack_ax(stack, top)); |
f127e61e MD |
1562 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); |
1563 | PO; | |
1564 | } | |
1565 | ||
80c2a69a | 1566 | OP(BYTECODE_OP_LOAD_FIELD_REF_USER_SEQUENCE): |
f127e61e MD |
1567 | { |
1568 | struct load_op *insn = (struct load_op *) pc; | |
1569 | struct field_ref *ref = (struct field_ref *) insn->data; | |
1570 | ||
1571 | dbg_printk("load field ref offset %u type user sequence\n", | |
1572 | ref->offset); | |
d644d1df | 1573 | estack_push(stack, top, ax, bx, ax_t, bx_t); |
f127e61e | 1574 | estack_ax(stack, top)->u.s.seq_len = |
03cb0cdd | 1575 | *(unsigned long *) &interpreter_stack_data[ref->offset]; |
5b4ad89f | 1576 | estack_ax(stack, top)->u.s.user_str = |
03cb0cdd | 1577 | *(const char **) (&interpreter_stack_data[ref->offset |
f127e61e | 1578 | + sizeof(unsigned long)]); |
acbe9250 | 1579 | if (unlikely(!estack_ax(stack, top)->u.s.user_str)) { |
80c2a69a | 1580 | dbg_printk("Bytecode warning: loading a NULL sequence.\n"); |
f127e61e MD |
1581 | ret = -EINVAL; |
1582 | goto end; | |
1583 | } | |
02aca193 PP |
1584 | estack_ax(stack, top)->u.s.literal_type = |
1585 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
f127e61e MD |
1586 | estack_ax(stack, top)->u.s.user = 1; |
1587 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
1588 | PO; | |
1589 | } | |
1590 | ||
80c2a69a | 1591 | OP(BYTECODE_OP_GET_CONTEXT_ROOT): |
3834b99f MD |
1592 | { |
1593 | dbg_printk("op get context root\n"); | |
d644d1df | 1594 | estack_push(stack, top, ax, bx, ax_t, bx_t); |
3834b99f MD |
1595 | estack_ax(stack, top)->u.ptr.type = LOAD_ROOT_CONTEXT; |
1596 | /* "field" only needed for variants. */ | |
1597 | estack_ax(stack, top)->u.ptr.field = NULL; | |
d644d1df | 1598 | estack_ax(stack, top)->type = REG_PTR; |
3834b99f MD |
1599 | next_pc += sizeof(struct load_op); |
1600 | PO; | |
1601 | } | |
1602 | ||
80c2a69a | 1603 | OP(BYTECODE_OP_GET_APP_CONTEXT_ROOT): |
3834b99f MD |
1604 | { |
1605 | BUG_ON(1); | |
1606 | PO; | |
1607 | } | |
1608 | ||
80c2a69a | 1609 | OP(BYTECODE_OP_GET_PAYLOAD_ROOT): |
3834b99f MD |
1610 | { |
1611 | dbg_printk("op get app payload root\n"); | |
d644d1df | 1612 | estack_push(stack, top, ax, bx, ax_t, bx_t); |
3834b99f | 1613 | estack_ax(stack, top)->u.ptr.type = LOAD_ROOT_PAYLOAD; |
03cb0cdd | 1614 | estack_ax(stack, top)->u.ptr.ptr = interpreter_stack_data; |
3834b99f MD |
1615 | /* "field" only needed for variants. */ |
1616 | estack_ax(stack, top)->u.ptr.field = NULL; | |
d644d1df | 1617 | estack_ax(stack, top)->type = REG_PTR; |
3834b99f MD |
1618 | next_pc += sizeof(struct load_op); |
1619 | PO; | |
1620 | } | |
1621 | ||
80c2a69a | 1622 | OP(BYTECODE_OP_GET_SYMBOL): |
3834b99f MD |
1623 | { |
1624 | dbg_printk("op get symbol\n"); | |
1625 | switch (estack_ax(stack, top)->u.ptr.type) { | |
1626 | case LOAD_OBJECT: | |
80c2a69a | 1627 | printk(KERN_WARNING "LTTng: bytecode: Nested fields not implemented yet.\n"); |
3834b99f MD |
1628 | ret = -EINVAL; |
1629 | goto end; | |
1630 | case LOAD_ROOT_CONTEXT: | |
1631 | case LOAD_ROOT_APP_CONTEXT: | |
1632 | case LOAD_ROOT_PAYLOAD: | |
1633 | /* | |
1634 | * symbol lookup is performed by | |
1635 | * specialization. | |
1636 | */ | |
1637 | ret = -EINVAL; | |
1638 | goto end; | |
1639 | } | |
1640 | next_pc += sizeof(struct load_op) + sizeof(struct get_symbol); | |
1641 | PO; | |
1642 | } | |
1643 | ||
80c2a69a | 1644 | OP(BYTECODE_OP_GET_SYMBOL_FIELD): |
3834b99f MD |
1645 | { |
1646 | /* | |
1647 | * Used for first variant encountered in a | |
1648 | * traversal. Variants are not implemented yet. | |
1649 | */ | |
1650 | ret = -EINVAL; | |
1651 | goto end; | |
1652 | } | |
1653 | ||
80c2a69a | 1654 | OP(BYTECODE_OP_GET_INDEX_U16): |
3834b99f MD |
1655 | { |
1656 | struct load_op *insn = (struct load_op *) pc; | |
1657 | struct get_index_u16 *index = (struct get_index_u16 *) insn->data; | |
1658 | ||
1659 | dbg_printk("op get index u16\n"); | |
1660 | ret = dynamic_get_index(lttng_probe_ctx, bytecode, index->index, estack_ax(stack, top)); | |
1661 | if (ret) | |
1662 | goto end; | |
1663 | estack_ax_v = estack_ax(stack, top)->u.v; | |
d644d1df | 1664 | estack_ax_t = estack_ax(stack, top)->type; |
3834b99f MD |
1665 | next_pc += sizeof(struct load_op) + sizeof(struct get_index_u16); |
1666 | PO; | |
1667 | } | |
1668 | ||
80c2a69a | 1669 | OP(BYTECODE_OP_GET_INDEX_U64): |
3834b99f MD |
1670 | { |
1671 | struct load_op *insn = (struct load_op *) pc; | |
1672 | struct get_index_u64 *index = (struct get_index_u64 *) insn->data; | |
1673 | ||
1674 | dbg_printk("op get index u64\n"); | |
1675 | ret = dynamic_get_index(lttng_probe_ctx, bytecode, index->index, estack_ax(stack, top)); | |
1676 | if (ret) | |
1677 | goto end; | |
1678 | estack_ax_v = estack_ax(stack, top)->u.v; | |
d644d1df | 1679 | estack_ax_t = estack_ax(stack, top)->type; |
3834b99f MD |
1680 | next_pc += sizeof(struct load_op) + sizeof(struct get_index_u64); |
1681 | PO; | |
1682 | } | |
1683 | ||
80c2a69a | 1684 | OP(BYTECODE_OP_LOAD_FIELD): |
3834b99f MD |
1685 | { |
1686 | dbg_printk("op load field\n"); | |
1687 | ret = dynamic_load_field(estack_ax(stack, top)); | |
1688 | if (ret) | |
1689 | goto end; | |
1690 | estack_ax_v = estack_ax(stack, top)->u.v; | |
d644d1df | 1691 | estack_ax_t = estack_ax(stack, top)->type; |
3834b99f MD |
1692 | next_pc += sizeof(struct load_op); |
1693 | PO; | |
1694 | } | |
1695 | ||
80c2a69a | 1696 | OP(BYTECODE_OP_LOAD_FIELD_S8): |
3834b99f MD |
1697 | { |
1698 | dbg_printk("op load field s8\n"); | |
1699 | ||
1700 | estack_ax_v = *(int8_t *) estack_ax(stack, top)->u.ptr.ptr; | |
d644d1df | 1701 | estack_ax_t = REG_S64; |
3834b99f MD |
1702 | next_pc += sizeof(struct load_op); |
1703 | PO; | |
1704 | } | |
80c2a69a | 1705 | OP(BYTECODE_OP_LOAD_FIELD_S16): |
3834b99f MD |
1706 | { |
1707 | dbg_printk("op load field s16\n"); | |
1708 | ||
1709 | estack_ax_v = *(int16_t *) estack_ax(stack, top)->u.ptr.ptr; | |
d644d1df | 1710 | estack_ax_t = REG_S64; |
3834b99f MD |
1711 | next_pc += sizeof(struct load_op); |
1712 | PO; | |
1713 | } | |
80c2a69a | 1714 | OP(BYTECODE_OP_LOAD_FIELD_S32): |
3834b99f MD |
1715 | { |
1716 | dbg_printk("op load field s32\n"); | |
1717 | ||
1718 | estack_ax_v = *(int32_t *) estack_ax(stack, top)->u.ptr.ptr; | |
d644d1df | 1719 | estack_ax_t = REG_S64; |
3834b99f MD |
1720 | next_pc += sizeof(struct load_op); |
1721 | PO; | |
1722 | } | |
80c2a69a | 1723 | OP(BYTECODE_OP_LOAD_FIELD_S64): |
3834b99f MD |
1724 | { |
1725 | dbg_printk("op load field s64\n"); | |
1726 | ||
1727 | estack_ax_v = *(int64_t *) estack_ax(stack, top)->u.ptr.ptr; | |
d644d1df | 1728 | estack_ax_t = REG_S64; |
3834b99f MD |
1729 | next_pc += sizeof(struct load_op); |
1730 | PO; | |
1731 | } | |
80c2a69a | 1732 | OP(BYTECODE_OP_LOAD_FIELD_U8): |
3834b99f MD |
1733 | { |
1734 | dbg_printk("op load field u8\n"); | |
1735 | ||
1736 | estack_ax_v = *(uint8_t *) estack_ax(stack, top)->u.ptr.ptr; | |
d644d1df | 1737 | estack_ax_t = REG_S64; |
3834b99f MD |
1738 | next_pc += sizeof(struct load_op); |
1739 | PO; | |
1740 | } | |
80c2a69a | 1741 | OP(BYTECODE_OP_LOAD_FIELD_U16): |
3834b99f MD |
1742 | { |
1743 | dbg_printk("op load field u16\n"); | |
1744 | ||
1745 | estack_ax_v = *(uint16_t *) estack_ax(stack, top)->u.ptr.ptr; | |
d644d1df | 1746 | estack_ax_t = REG_S64; |
3834b99f MD |
1747 | next_pc += sizeof(struct load_op); |
1748 | PO; | |
1749 | } | |
80c2a69a | 1750 | OP(BYTECODE_OP_LOAD_FIELD_U32): |
3834b99f MD |
1751 | { |
1752 | dbg_printk("op load field u32\n"); | |
1753 | ||
1754 | estack_ax_v = *(uint32_t *) estack_ax(stack, top)->u.ptr.ptr; | |
d644d1df | 1755 | estack_ax_t = REG_S64; |
3834b99f MD |
1756 | next_pc += sizeof(struct load_op); |
1757 | PO; | |
1758 | } | |
80c2a69a | 1759 | OP(BYTECODE_OP_LOAD_FIELD_U64): |
3834b99f MD |
1760 | { |
1761 | dbg_printk("op load field u64\n"); | |
1762 | ||
1763 | estack_ax_v = *(uint64_t *) estack_ax(stack, top)->u.ptr.ptr; | |
d644d1df | 1764 | estack_ax_t = REG_S64; |
3834b99f MD |
1765 | next_pc += sizeof(struct load_op); |
1766 | PO; | |
1767 | } | |
80c2a69a | 1768 | OP(BYTECODE_OP_LOAD_FIELD_DOUBLE): |
3834b99f MD |
1769 | { |
1770 | ret = -EINVAL; | |
1771 | goto end; | |
1772 | } | |
1773 | ||
80c2a69a | 1774 | OP(BYTECODE_OP_LOAD_FIELD_STRING): |
3834b99f MD |
1775 | { |
1776 | const char *str; | |
1777 | ||
1778 | dbg_printk("op load field string\n"); | |
1779 | str = (const char *) estack_ax(stack, top)->u.ptr.ptr; | |
1780 | estack_ax(stack, top)->u.s.str = str; | |
1781 | if (unlikely(!estack_ax(stack, top)->u.s.str)) { | |
80c2a69a | 1782 | dbg_printk("Bytecode warning: loading a NULL string.\n"); |
3834b99f MD |
1783 | ret = -EINVAL; |
1784 | goto end; | |
1785 | } | |
4efe037b | 1786 | estack_ax(stack, top)->u.s.seq_len = LTTNG_SIZE_MAX; |
3834b99f MD |
1787 | estack_ax(stack, top)->u.s.literal_type = |
1788 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
d644d1df | 1789 | estack_ax(stack, top)->type = REG_STRING; |
3834b99f MD |
1790 | next_pc += sizeof(struct load_op); |
1791 | PO; | |
1792 | } | |
1793 | ||
80c2a69a | 1794 | OP(BYTECODE_OP_LOAD_FIELD_SEQUENCE): |
3834b99f MD |
1795 | { |
1796 | const char *ptr; | |
1797 | ||
1798 | dbg_printk("op load field string sequence\n"); | |
1799 | ptr = estack_ax(stack, top)->u.ptr.ptr; | |
1800 | estack_ax(stack, top)->u.s.seq_len = *(unsigned long *) ptr; | |
1801 | estack_ax(stack, top)->u.s.str = *(const char **) (ptr + sizeof(unsigned long)); | |
1802 | if (unlikely(!estack_ax(stack, top)->u.s.str)) { | |
80c2a69a | 1803 | dbg_printk("Bytecode warning: loading a NULL sequence.\n"); |
3834b99f MD |
1804 | ret = -EINVAL; |
1805 | goto end; | |
1806 | } | |
1807 | estack_ax(stack, top)->u.s.literal_type = | |
1808 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
d644d1df | 1809 | estack_ax(stack, top)->type = REG_STRING; |
3834b99f MD |
1810 | next_pc += sizeof(struct load_op); |
1811 | PO; | |
1812 | } | |
1813 | ||
07dfc1d0 MD |
1814 | END_OP |
1815 | end: | |
8a445457 | 1816 | /* No need to prepare output if an error occurred. */ |
07dfc1d0 | 1817 | if (ret) |
8a445457 | 1818 | return LTTNG_KERNEL_BYTECODE_INTERPRETER_ERROR; |
03cb0cdd | 1819 | |
8a445457 MD |
1820 | /* Prepare output. */ |
1821 | switch (kernel_bytecode->type) { | |
1822 | case LTTNG_KERNEL_BYTECODE_TYPE_FILTER: | |
1823 | { | |
1824 | struct lttng_kernel_bytecode_filter_ctx *filter_ctx = | |
1825 | (struct lttng_kernel_bytecode_filter_ctx *) caller_ctx; | |
1826 | if (retval) | |
1827 | filter_ctx->result = LTTNG_KERNEL_BYTECODE_FILTER_ACCEPT; | |
1828 | else | |
1829 | filter_ctx->result = LTTNG_KERNEL_BYTECODE_FILTER_REJECT; | |
1830 | break; | |
03cb0cdd | 1831 | } |
8a445457 MD |
1832 | case LTTNG_KERNEL_BYTECODE_TYPE_CAPTURE: |
1833 | ret = lttng_bytecode_interpret_format_output(estack_ax(stack, top), | |
1834 | (struct lttng_interpreter_output *) caller_ctx); | |
1835 | break; | |
1836 | default: | |
1837 | ret = -EINVAL; | |
1838 | break; | |
1839 | } | |
1840 | if (ret) | |
1841 | return LTTNG_KERNEL_BYTECODE_INTERPRETER_ERROR; | |
1842 | else | |
1843 | return LTTNG_KERNEL_BYTECODE_INTERPRETER_OK; | |
03cb0cdd | 1844 | } |
8a445457 | 1845 | LTTNG_STACK_FRAME_NON_STANDARD(lttng_bytecode_interpret); |
07dfc1d0 | 1846 | |
8a445457 MD |
1847 | /* |
1848 | * Return LTTNG_KERNEL_EVENT_FILTER_ACCEPT or LTTNG_KERNEL_EVENT_FILTER_REJECT. | |
1849 | */ | |
1850 | int lttng_kernel_interpret_event_filter(const struct lttng_kernel_event_common *event, | |
1851 | const char *interpreter_stack_data, | |
1852 | struct lttng_probe_ctx *probe_ctx, | |
1853 | void *event_filter_ctx __attribute__((unused))) | |
99d223ad | 1854 | { |
8a445457 MD |
1855 | struct lttng_bytecode_runtime *filter_bc_runtime; |
1856 | struct list_head *filter_bytecode_runtime_head = &event->priv->filter_bytecode_runtime_head; | |
1857 | struct lttng_kernel_bytecode_filter_ctx bytecode_filter_ctx; | |
1858 | bool filter_record = false; | |
1859 | ||
1860 | list_for_each_entry_rcu(filter_bc_runtime, filter_bytecode_runtime_head, node) { | |
1861 | if (likely(filter_bc_runtime->interpreter_func(filter_bc_runtime, | |
1862 | interpreter_stack_data, probe_ctx, &bytecode_filter_ctx) == LTTNG_KERNEL_BYTECODE_INTERPRETER_OK)) { | |
1863 | if (unlikely(bytecode_filter_ctx.result == LTTNG_KERNEL_BYTECODE_FILTER_ACCEPT)) { | |
1864 | filter_record = true; | |
1865 | break; | |
1866 | } | |
1867 | } | |
1868 | } | |
1869 | if (filter_record) | |
1870 | return LTTNG_KERNEL_EVENT_FILTER_ACCEPT; | |
1871 | else | |
1872 | return LTTNG_KERNEL_EVENT_FILTER_REJECT; | |
99d223ad FD |
1873 | } |
1874 | ||
07dfc1d0 MD |
1875 | #undef START_OP |
1876 | #undef OP | |
1877 | #undef PO | |
1878 | #undef END_OP |