Commit | Line | Data |
---|---|---|
9f36eaed MJ |
1 | /* SPDX-License-Identifier: MIT |
2 | * | |
80c2a69a | 3 | * lttng-bytecode-specialize.c |
07dfc1d0 | 4 | * |
80c2a69a | 5 | * LTTng modules bytecode code specializer. |
07dfc1d0 | 6 | * |
bbf3aef5 | 7 | * Copyright (C) 2010-2016 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
07dfc1d0 MD |
8 | */ |
9 | ||
3834b99f | 10 | #include <linux/slab.h> |
80c2a69a | 11 | #include <lttng/lttng-bytecode.h> |
a071f25d | 12 | #include <lttng/align.h> |
437d5aa5 | 13 | #include <lttng/events-internal.h> |
07dfc1d0 | 14 | |
3834b99f MD |
15 | static ssize_t bytecode_reserve_data(struct bytecode_runtime *runtime, |
16 | size_t align, size_t len) | |
17 | { | |
18 | ssize_t ret; | |
19 | size_t padding = offset_align(runtime->data_len, align); | |
20 | size_t new_len = runtime->data_len + padding + len; | |
21 | size_t new_alloc_len = new_len; | |
22 | size_t old_alloc_len = runtime->data_alloc_len; | |
23 | ||
80c2a69a | 24 | if (new_len > INTERPRETER_MAX_DATA_LEN) |
3834b99f MD |
25 | return -EINVAL; |
26 | ||
27 | if (new_alloc_len > old_alloc_len) { | |
28 | char *newptr; | |
29 | ||
30 | new_alloc_len = | |
31 | max_t(size_t, 1U << get_count_order(new_alloc_len), old_alloc_len << 1); | |
32 | newptr = krealloc(runtime->data, new_alloc_len, GFP_KERNEL); | |
33 | if (!newptr) | |
34 | return -ENOMEM; | |
35 | runtime->data = newptr; | |
36 | /* We zero directly the memory from start of allocation. */ | |
37 | memset(&runtime->data[old_alloc_len], 0, new_alloc_len - old_alloc_len); | |
38 | runtime->data_alloc_len = new_alloc_len; | |
39 | } | |
40 | runtime->data_len += padding; | |
41 | ret = runtime->data_len; | |
42 | runtime->data_len += len; | |
43 | return ret; | |
44 | } | |
45 | ||
46 | static ssize_t bytecode_push_data(struct bytecode_runtime *runtime, | |
47 | const void *p, size_t align, size_t len) | |
48 | { | |
49 | ssize_t offset; | |
50 | ||
51 | offset = bytecode_reserve_data(runtime, align, len); | |
52 | if (offset < 0) | |
53 | return -ENOMEM; | |
54 | memcpy(&runtime->data[offset], p, len); | |
55 | return offset; | |
56 | } | |
57 | ||
58 | static int specialize_load_field(struct vstack_entry *stack_top, | |
59 | struct load_op *insn) | |
60 | { | |
61 | int ret; | |
62 | ||
63 | switch (stack_top->load.type) { | |
64 | case LOAD_OBJECT: | |
65 | break; | |
66 | case LOAD_ROOT_CONTEXT: | |
67 | case LOAD_ROOT_APP_CONTEXT: | |
68 | case LOAD_ROOT_PAYLOAD: | |
69 | default: | |
80c2a69a | 70 | dbg_printk("Bytecode warning: cannot load root, missing field name.\n"); |
3834b99f MD |
71 | ret = -EINVAL; |
72 | goto end; | |
73 | } | |
74 | switch (stack_top->load.object_type) { | |
75 | case OBJECT_TYPE_S8: | |
76 | dbg_printk("op load field s8\n"); | |
77 | stack_top->type = REG_S64; | |
78 | if (!stack_top->load.rev_bo) | |
80c2a69a | 79 | insn->op = BYTECODE_OP_LOAD_FIELD_S8; |
3834b99f MD |
80 | break; |
81 | case OBJECT_TYPE_S16: | |
82 | dbg_printk("op load field s16\n"); | |
83 | stack_top->type = REG_S64; | |
84 | if (!stack_top->load.rev_bo) | |
80c2a69a | 85 | insn->op = BYTECODE_OP_LOAD_FIELD_S16; |
3834b99f MD |
86 | break; |
87 | case OBJECT_TYPE_S32: | |
88 | dbg_printk("op load field s32\n"); | |
89 | stack_top->type = REG_S64; | |
90 | if (!stack_top->load.rev_bo) | |
80c2a69a | 91 | insn->op = BYTECODE_OP_LOAD_FIELD_S32; |
3834b99f MD |
92 | break; |
93 | case OBJECT_TYPE_S64: | |
94 | dbg_printk("op load field s64\n"); | |
95 | stack_top->type = REG_S64; | |
96 | if (!stack_top->load.rev_bo) | |
80c2a69a | 97 | insn->op = BYTECODE_OP_LOAD_FIELD_S64; |
3834b99f | 98 | break; |
29a574c3 FD |
99 | case OBJECT_TYPE_SIGNED_ENUM: |
100 | dbg_printk("op load field signed enumeration\n"); | |
101 | stack_top->type = REG_PTR; | |
102 | break; | |
3834b99f MD |
103 | case OBJECT_TYPE_U8: |
104 | dbg_printk("op load field u8\n"); | |
105 | stack_top->type = REG_S64; | |
80c2a69a | 106 | insn->op = BYTECODE_OP_LOAD_FIELD_U8; |
3834b99f MD |
107 | break; |
108 | case OBJECT_TYPE_U16: | |
109 | dbg_printk("op load field u16\n"); | |
110 | stack_top->type = REG_S64; | |
111 | if (!stack_top->load.rev_bo) | |
80c2a69a | 112 | insn->op = BYTECODE_OP_LOAD_FIELD_U16; |
3834b99f MD |
113 | break; |
114 | case OBJECT_TYPE_U32: | |
115 | dbg_printk("op load field u32\n"); | |
116 | stack_top->type = REG_S64; | |
117 | if (!stack_top->load.rev_bo) | |
80c2a69a | 118 | insn->op = BYTECODE_OP_LOAD_FIELD_U32; |
3834b99f MD |
119 | break; |
120 | case OBJECT_TYPE_U64: | |
121 | dbg_printk("op load field u64\n"); | |
122 | stack_top->type = REG_S64; | |
123 | if (!stack_top->load.rev_bo) | |
80c2a69a | 124 | insn->op = BYTECODE_OP_LOAD_FIELD_U64; |
3834b99f | 125 | break; |
29a574c3 FD |
126 | case OBJECT_TYPE_UNSIGNED_ENUM: |
127 | dbg_printk("op load field unsigned enumeration\n"); | |
128 | stack_top->type = REG_PTR; | |
129 | break; | |
3834b99f | 130 | case OBJECT_TYPE_DOUBLE: |
80c2a69a | 131 | printk(KERN_WARNING "LTTng: bytecode: Double type unsupported\n\n"); |
3834b99f MD |
132 | ret = -EINVAL; |
133 | goto end; | |
134 | case OBJECT_TYPE_STRING: | |
135 | dbg_printk("op load field string\n"); | |
136 | stack_top->type = REG_STRING; | |
80c2a69a | 137 | insn->op = BYTECODE_OP_LOAD_FIELD_STRING; |
3834b99f MD |
138 | break; |
139 | case OBJECT_TYPE_STRING_SEQUENCE: | |
140 | dbg_printk("op load field string sequence\n"); | |
141 | stack_top->type = REG_STRING; | |
80c2a69a | 142 | insn->op = BYTECODE_OP_LOAD_FIELD_SEQUENCE; |
3834b99f MD |
143 | break; |
144 | case OBJECT_TYPE_DYNAMIC: | |
145 | ret = -EINVAL; | |
146 | goto end; | |
147 | case OBJECT_TYPE_SEQUENCE: | |
148 | case OBJECT_TYPE_ARRAY: | |
149 | case OBJECT_TYPE_STRUCT: | |
150 | case OBJECT_TYPE_VARIANT: | |
80c2a69a | 151 | printk(KERN_WARNING "LTTng: bytecode: Sequences, arrays, struct and variant cannot be loaded (nested types).\n"); |
3834b99f MD |
152 | ret = -EINVAL; |
153 | goto end; | |
154 | } | |
155 | return 0; | |
156 | ||
157 | end: | |
158 | return ret; | |
159 | } | |
160 | ||
161 | static int specialize_get_index_object_type(enum object_type *otype, | |
162 | int signedness, uint32_t elem_len) | |
163 | { | |
164 | switch (elem_len) { | |
165 | case 8: | |
166 | if (signedness) | |
167 | *otype = OBJECT_TYPE_S8; | |
168 | else | |
169 | *otype = OBJECT_TYPE_U8; | |
170 | break; | |
171 | case 16: | |
172 | if (signedness) | |
173 | *otype = OBJECT_TYPE_S16; | |
174 | else | |
175 | *otype = OBJECT_TYPE_U16; | |
176 | break; | |
177 | case 32: | |
178 | if (signedness) | |
179 | *otype = OBJECT_TYPE_S32; | |
180 | else | |
181 | *otype = OBJECT_TYPE_U32; | |
182 | break; | |
183 | case 64: | |
184 | if (signedness) | |
185 | *otype = OBJECT_TYPE_S64; | |
186 | else | |
187 | *otype = OBJECT_TYPE_U64; | |
188 | break; | |
189 | default: | |
190 | return -EINVAL; | |
191 | } | |
192 | return 0; | |
193 | } | |
194 | ||
195 | static int specialize_get_index(struct bytecode_runtime *runtime, | |
196 | struct load_op *insn, uint64_t index, | |
197 | struct vstack_entry *stack_top, | |
198 | int idx_len) | |
199 | { | |
200 | int ret; | |
80c2a69a | 201 | struct bytecode_get_index_data gid; |
3834b99f MD |
202 | ssize_t data_offset; |
203 | ||
204 | memset(&gid, 0, sizeof(gid)); | |
205 | switch (stack_top->load.type) { | |
206 | case LOAD_OBJECT: | |
207 | switch (stack_top->load.object_type) { | |
208 | case OBJECT_TYPE_ARRAY: | |
209 | { | |
437d5aa5 MD |
210 | const struct lttng_kernel_event_field *field; |
211 | const struct lttng_kernel_type_array *array_type; | |
212 | const struct lttng_kernel_type_integer *integer_type; | |
3834b99f MD |
213 | uint32_t elem_len, num_elems; |
214 | int signedness; | |
215 | ||
216 | field = stack_top->load.field; | |
437d5aa5 MD |
217 | array_type = lttng_kernel_get_type_array(field->type); |
218 | if (!lttng_kernel_type_is_bytewise_integer(array_type->elem_type)) { | |
ceabb767 MD |
219 | ret = -EINVAL; |
220 | goto end; | |
221 | } | |
437d5aa5 MD |
222 | integer_type = lttng_kernel_get_type_integer(array_type->elem_type); |
223 | num_elems = array_type->length; | |
ceabb767 MD |
224 | elem_len = integer_type->size; |
225 | signedness = integer_type->signedness; | |
3834b99f MD |
226 | if (index >= num_elems) { |
227 | ret = -EINVAL; | |
228 | goto end; | |
229 | } | |
230 | ret = specialize_get_index_object_type(&stack_top->load.object_type, | |
231 | signedness, elem_len); | |
232 | if (ret) | |
233 | goto end; | |
234 | gid.offset = index * (elem_len / CHAR_BIT); | |
235 | gid.array_len = num_elems * (elem_len / CHAR_BIT); | |
236 | gid.elem.type = stack_top->load.object_type; | |
237 | gid.elem.len = elem_len; | |
ceabb767 | 238 | if (integer_type->reverse_byte_order) |
3834b99f MD |
239 | gid.elem.rev_bo = true; |
240 | stack_top->load.rev_bo = gid.elem.rev_bo; | |
241 | break; | |
242 | } | |
243 | case OBJECT_TYPE_SEQUENCE: | |
244 | { | |
437d5aa5 MD |
245 | const struct lttng_kernel_event_field *field; |
246 | const struct lttng_kernel_type_sequence *sequence_type; | |
247 | const struct lttng_kernel_type_integer *integer_type; | |
3834b99f MD |
248 | uint32_t elem_len; |
249 | int signedness; | |
250 | ||
251 | field = stack_top->load.field; | |
437d5aa5 MD |
252 | sequence_type = lttng_kernel_get_type_sequence(field->type); |
253 | if (!lttng_kernel_type_is_bytewise_integer(sequence_type->elem_type)) { | |
ceabb767 MD |
254 | ret = -EINVAL; |
255 | goto end; | |
256 | } | |
437d5aa5 | 257 | integer_type = lttng_kernel_get_type_integer(sequence_type->elem_type); |
ceabb767 MD |
258 | elem_len = integer_type->size; |
259 | signedness = integer_type->signedness; | |
3834b99f MD |
260 | ret = specialize_get_index_object_type(&stack_top->load.object_type, |
261 | signedness, elem_len); | |
262 | if (ret) | |
263 | goto end; | |
264 | gid.offset = index * (elem_len / CHAR_BIT); | |
265 | gid.elem.type = stack_top->load.object_type; | |
266 | gid.elem.len = elem_len; | |
ceabb767 | 267 | if (integer_type->reverse_byte_order) |
3834b99f MD |
268 | gid.elem.rev_bo = true; |
269 | stack_top->load.rev_bo = gid.elem.rev_bo; | |
270 | break; | |
271 | } | |
272 | case OBJECT_TYPE_STRUCT: | |
273 | /* Only generated by the specialize phase. */ | |
274 | case OBJECT_TYPE_VARIANT: /* Fall-through */ | |
275 | default: | |
80c2a69a | 276 | printk(KERN_WARNING "LTTng: bytecode: Unexpected get index type %d", |
3834b99f MD |
277 | (int) stack_top->load.object_type); |
278 | ret = -EINVAL; | |
279 | goto end; | |
280 | } | |
281 | break; | |
282 | case LOAD_ROOT_CONTEXT: | |
283 | case LOAD_ROOT_APP_CONTEXT: | |
284 | case LOAD_ROOT_PAYLOAD: | |
80c2a69a | 285 | printk(KERN_WARNING "LTTng: bytecode: Index lookup for root field not implemented yet.\n"); |
3834b99f MD |
286 | ret = -EINVAL; |
287 | goto end; | |
288 | } | |
289 | data_offset = bytecode_push_data(runtime, &gid, | |
290 | __alignof__(gid), sizeof(gid)); | |
291 | if (data_offset < 0) { | |
292 | ret = -EINVAL; | |
293 | goto end; | |
294 | } | |
295 | switch (idx_len) { | |
296 | case 2: | |
297 | ((struct get_index_u16 *) insn->data)->index = data_offset; | |
298 | break; | |
299 | case 8: | |
300 | ((struct get_index_u64 *) insn->data)->index = data_offset; | |
301 | break; | |
302 | default: | |
303 | ret = -EINVAL; | |
304 | goto end; | |
305 | } | |
306 | ||
307 | return 0; | |
308 | ||
309 | end: | |
310 | return ret; | |
311 | } | |
312 | ||
437d5aa5 | 313 | static int specialize_context_lookup_name(struct lttng_kernel_ctx *ctx, |
2dfda770 | 314 | struct bytecode_runtime *bytecode, |
3834b99f MD |
315 | struct load_op *insn) |
316 | { | |
317 | uint16_t offset; | |
318 | const char *name; | |
319 | ||
320 | offset = ((struct get_symbol *) insn->data)->offset; | |
321 | name = bytecode->p.bc->bc.data + bytecode->p.bc->bc.reloc_offset + offset; | |
437d5aa5 | 322 | return lttng_kernel_get_context_index(ctx, name); |
3834b99f MD |
323 | } |
324 | ||
437d5aa5 | 325 | static int specialize_load_object(const struct lttng_kernel_event_field *field, |
3834b99f MD |
326 | struct vstack_load *load, bool is_context) |
327 | { | |
328 | load->type = LOAD_OBJECT; | |
1242217a | 329 | |
437d5aa5 | 330 | switch (field->type->type) { |
12bb2edb | 331 | case lttng_kernel_type_integer: |
437d5aa5 | 332 | if (lttng_kernel_get_type_integer(field->type)->signedness) |
3834b99f MD |
333 | load->object_type = OBJECT_TYPE_S64; |
334 | else | |
335 | load->object_type = OBJECT_TYPE_U64; | |
336 | load->rev_bo = false; | |
337 | break; | |
437d5aa5 | 338 | case lttng_kernel_type_enum: |
3834b99f | 339 | { |
437d5aa5 MD |
340 | const struct lttng_kernel_type_enum *enum_type = lttng_kernel_get_type_enum(field->type); |
341 | const struct lttng_kernel_type_integer *integer_type = lttng_kernel_get_type_integer(enum_type->container_type); | |
3834b99f | 342 | |
437d5aa5 | 343 | if (integer_type->signedness) |
29a574c3 | 344 | load->object_type = OBJECT_TYPE_SIGNED_ENUM; |
3834b99f | 345 | else |
29a574c3 | 346 | load->object_type = OBJECT_TYPE_UNSIGNED_ENUM; |
3834b99f MD |
347 | load->rev_bo = false; |
348 | break; | |
349 | } | |
437d5aa5 MD |
350 | case lttng_kernel_type_array: |
351 | { | |
352 | const struct lttng_kernel_type_array *array_type = lttng_kernel_get_type_array(field->type); | |
353 | ||
354 | if (!lttng_kernel_type_is_bytewise_integer(array_type->elem_type)) { | |
80c2a69a | 355 | printk(KERN_WARNING "LTTng: bytecode: Array nesting only supports integer types.\n"); |
3834b99f MD |
356 | return -EINVAL; |
357 | } | |
358 | if (is_context) { | |
359 | load->object_type = OBJECT_TYPE_STRING; | |
360 | } else { | |
437d5aa5 | 361 | if (array_type->encoding == lttng_kernel_string_encoding_none) { |
3834b99f MD |
362 | load->object_type = OBJECT_TYPE_ARRAY; |
363 | load->field = field; | |
364 | } else { | |
365 | load->object_type = OBJECT_TYPE_STRING_SEQUENCE; | |
366 | } | |
367 | } | |
368 | break; | |
437d5aa5 MD |
369 | } |
370 | case lttng_kernel_type_sequence: | |
371 | { | |
372 | const struct lttng_kernel_type_sequence *sequence_type = lttng_kernel_get_type_sequence(field->type); | |
373 | ||
374 | if (!lttng_kernel_type_is_bytewise_integer(sequence_type->elem_type)) { | |
80c2a69a | 375 | printk(KERN_WARNING "LTTng: bytecode: Sequence nesting only supports integer types.\n"); |
3834b99f MD |
376 | return -EINVAL; |
377 | } | |
378 | if (is_context) { | |
379 | load->object_type = OBJECT_TYPE_STRING; | |
380 | } else { | |
437d5aa5 | 381 | if (sequence_type->encoding == lttng_kernel_string_encoding_none) { |
3834b99f MD |
382 | load->object_type = OBJECT_TYPE_SEQUENCE; |
383 | load->field = field; | |
384 | } else { | |
385 | load->object_type = OBJECT_TYPE_STRING_SEQUENCE; | |
386 | } | |
387 | } | |
388 | break; | |
437d5aa5 | 389 | } |
12bb2edb | 390 | case lttng_kernel_type_string: |
3834b99f MD |
391 | load->object_type = OBJECT_TYPE_STRING; |
392 | break; | |
437d5aa5 | 393 | case lttng_kernel_type_struct: |
80c2a69a | 394 | printk(KERN_WARNING "LTTng: bytecode: Structure type cannot be loaded.\n"); |
3834b99f | 395 | return -EINVAL; |
437d5aa5 | 396 | case lttng_kernel_type_variant: |
80c2a69a | 397 | printk(KERN_WARNING "LTTng: bytecode: Variant type cannot be loaded.\n"); |
ceabb767 | 398 | return -EINVAL; |
3834b99f | 399 | default: |
437d5aa5 | 400 | printk(KERN_WARNING "LTTng: bytecode: Unknown type: %d", (int) field->type->type); |
3834b99f MD |
401 | return -EINVAL; |
402 | } | |
403 | return 0; | |
404 | } | |
405 | ||
437d5aa5 | 406 | static int specialize_context_lookup(struct lttng_kernel_ctx *ctx, |
2dfda770 | 407 | struct bytecode_runtime *runtime, |
3834b99f MD |
408 | struct load_op *insn, |
409 | struct vstack_load *load) | |
410 | { | |
411 | int idx, ret; | |
437d5aa5 MD |
412 | const struct lttng_kernel_ctx_field *ctx_field; |
413 | const struct lttng_kernel_event_field *field; | |
80c2a69a | 414 | struct bytecode_get_index_data gid; |
3834b99f MD |
415 | ssize_t data_offset; |
416 | ||
2dfda770 | 417 | idx = specialize_context_lookup_name(ctx, runtime, insn); |
3834b99f MD |
418 | if (idx < 0) { |
419 | return -ENOENT; | |
420 | } | |
421 | ctx_field = <tng_static_ctx->fields[idx]; | |
437d5aa5 | 422 | field = ctx_field->event_field; |
3834b99f MD |
423 | ret = specialize_load_object(field, load, true); |
424 | if (ret) | |
425 | return ret; | |
426 | /* Specialize each get_symbol into a get_index. */ | |
80c2a69a | 427 | insn->op = BYTECODE_OP_GET_INDEX_U16; |
3834b99f MD |
428 | memset(&gid, 0, sizeof(gid)); |
429 | gid.ctx_index = idx; | |
430 | gid.elem.type = load->object_type; | |
60e8b0d6 | 431 | gid.elem.rev_bo = load->rev_bo; |
03cb0cdd | 432 | gid.field = field; |
3834b99f MD |
433 | data_offset = bytecode_push_data(runtime, &gid, |
434 | __alignof__(gid), sizeof(gid)); | |
435 | if (data_offset < 0) { | |
436 | return -EINVAL; | |
437 | } | |
438 | ((struct get_index_u16 *) insn->data)->index = data_offset; | |
439 | return 0; | |
440 | } | |
441 | ||
437d5aa5 | 442 | static int specialize_payload_lookup(const struct lttng_kernel_event_desc *event_desc, |
3834b99f MD |
443 | struct bytecode_runtime *runtime, |
444 | struct load_op *insn, | |
445 | struct vstack_load *load) | |
446 | { | |
447 | const char *name; | |
448 | uint16_t offset; | |
3834b99f MD |
449 | unsigned int i, nr_fields; |
450 | bool found = false; | |
451 | uint32_t field_offset = 0; | |
437d5aa5 | 452 | const struct lttng_kernel_event_field *field; |
3834b99f | 453 | int ret; |
80c2a69a | 454 | struct bytecode_get_index_data gid; |
3834b99f MD |
455 | ssize_t data_offset; |
456 | ||
6c8c025b | 457 | nr_fields = event_desc->tp_class->nr_fields; |
3834b99f MD |
458 | offset = ((struct get_symbol *) insn->data)->offset; |
459 | name = runtime->p.bc->bc.data + runtime->p.bc->bc.reloc_offset + offset; | |
460 | for (i = 0; i < nr_fields; i++) { | |
6c8c025b | 461 | field = event_desc->tp_class->fields[i]; |
ceabb767 MD |
462 | if (field->nofilter) { |
463 | continue; | |
464 | } | |
3834b99f MD |
465 | if (!strcmp(field->name, name)) { |
466 | found = true; | |
467 | break; | |
468 | } | |
469 | /* compute field offset on stack */ | |
437d5aa5 | 470 | switch (field->type->type) { |
12bb2edb | 471 | case lttng_kernel_type_integer: |
437d5aa5 | 472 | case lttng_kernel_type_enum: |
3834b99f MD |
473 | field_offset += sizeof(int64_t); |
474 | break; | |
437d5aa5 MD |
475 | case lttng_kernel_type_array: |
476 | case lttng_kernel_type_sequence: | |
3834b99f MD |
477 | field_offset += sizeof(unsigned long); |
478 | field_offset += sizeof(void *); | |
479 | break; | |
12bb2edb | 480 | case lttng_kernel_type_string: |
3834b99f MD |
481 | field_offset += sizeof(void *); |
482 | break; | |
483 | default: | |
484 | ret = -EINVAL; | |
485 | goto end; | |
486 | } | |
487 | } | |
488 | if (!found) { | |
489 | ret = -EINVAL; | |
490 | goto end; | |
491 | } | |
492 | ||
493 | ret = specialize_load_object(field, load, false); | |
494 | if (ret) | |
495 | goto end; | |
496 | ||
497 | /* Specialize each get_symbol into a get_index. */ | |
80c2a69a | 498 | insn->op = BYTECODE_OP_GET_INDEX_U16; |
3834b99f MD |
499 | memset(&gid, 0, sizeof(gid)); |
500 | gid.offset = field_offset; | |
501 | gid.elem.type = load->object_type; | |
60e8b0d6 | 502 | gid.elem.rev_bo = load->rev_bo; |
03cb0cdd | 503 | gid.field = field; |
3834b99f MD |
504 | data_offset = bytecode_push_data(runtime, &gid, |
505 | __alignof__(gid), sizeof(gid)); | |
506 | if (data_offset < 0) { | |
507 | ret = -EINVAL; | |
508 | goto end; | |
509 | } | |
510 | ((struct get_index_u16 *) insn->data)->index = data_offset; | |
511 | ret = 0; | |
512 | end: | |
513 | return ret; | |
514 | } | |
515 | ||
437d5aa5 | 516 | int lttng_bytecode_specialize(const struct lttng_kernel_event_desc *event_desc, |
3834b99f | 517 | struct bytecode_runtime *bytecode) |
07dfc1d0 MD |
518 | { |
519 | void *pc, *next_pc, *start_pc; | |
520 | int ret = -EINVAL; | |
521 | struct vstack _stack; | |
522 | struct vstack *stack = &_stack; | |
437d5aa5 | 523 | struct lttng_kernel_ctx *ctx = bytecode->p.ctx; |
07dfc1d0 MD |
524 | |
525 | vstack_init(stack); | |
526 | ||
3834b99f | 527 | start_pc = &bytecode->code[0]; |
07dfc1d0 MD |
528 | for (pc = next_pc = start_pc; pc - start_pc < bytecode->len; |
529 | pc = next_pc) { | |
80c2a69a FD |
530 | switch (*(bytecode_opcode_t *) pc) { |
531 | case BYTECODE_OP_UNKNOWN: | |
07dfc1d0 | 532 | default: |
80c2a69a FD |
533 | printk(KERN_WARNING "LTTng: bytecode: unknown bytecode op %u\n", |
534 | (unsigned int) *(bytecode_opcode_t *) pc); | |
07dfc1d0 MD |
535 | ret = -EINVAL; |
536 | goto end; | |
537 | ||
80c2a69a FD |
538 | case BYTECODE_OP_RETURN: |
539 | case BYTECODE_OP_RETURN_S64: | |
07dfc1d0 MD |
540 | ret = 0; |
541 | goto end; | |
542 | ||
543 | /* binary */ | |
80c2a69a FD |
544 | case BYTECODE_OP_MUL: |
545 | case BYTECODE_OP_DIV: | |
546 | case BYTECODE_OP_MOD: | |
547 | case BYTECODE_OP_PLUS: | |
548 | case BYTECODE_OP_MINUS: | |
549 | printk(KERN_WARNING "LTTng: bytecode: unknown bytecode op %u\n", | |
550 | (unsigned int) *(bytecode_opcode_t *) pc); | |
07dfc1d0 MD |
551 | ret = -EINVAL; |
552 | goto end; | |
553 | ||
80c2a69a | 554 | case BYTECODE_OP_EQ: |
07dfc1d0 MD |
555 | { |
556 | struct binary_op *insn = (struct binary_op *) pc; | |
557 | ||
558 | switch(vstack_ax(stack)->type) { | |
559 | default: | |
80c2a69a | 560 | printk(KERN_WARNING "LTTng: bytecode: unknown register type\n"); |
07dfc1d0 MD |
561 | ret = -EINVAL; |
562 | goto end; | |
563 | ||
564 | case REG_STRING: | |
02aca193 | 565 | if (vstack_bx(stack)->type == REG_STAR_GLOB_STRING) |
80c2a69a | 566 | insn->op = BYTECODE_OP_EQ_STAR_GLOB_STRING; |
02aca193 | 567 | else |
80c2a69a | 568 | insn->op = BYTECODE_OP_EQ_STRING; |
02aca193 PP |
569 | break; |
570 | case REG_STAR_GLOB_STRING: | |
80c2a69a | 571 | insn->op = BYTECODE_OP_EQ_STAR_GLOB_STRING; |
07dfc1d0 MD |
572 | break; |
573 | case REG_S64: | |
574 | if (vstack_bx(stack)->type == REG_S64) | |
80c2a69a | 575 | insn->op = BYTECODE_OP_EQ_S64; |
07dfc1d0 | 576 | else |
80c2a69a | 577 | insn->op = BYTECODE_OP_EQ_DOUBLE_S64; |
07dfc1d0 MD |
578 | break; |
579 | case REG_DOUBLE: | |
580 | if (vstack_bx(stack)->type == REG_S64) | |
80c2a69a | 581 | insn->op = BYTECODE_OP_EQ_S64_DOUBLE; |
07dfc1d0 | 582 | else |
80c2a69a | 583 | insn->op = BYTECODE_OP_EQ_DOUBLE; |
07dfc1d0 MD |
584 | break; |
585 | } | |
586 | /* Pop 2, push 1 */ | |
587 | if (vstack_pop(stack)) { | |
588 | ret = -EINVAL; | |
589 | goto end; | |
590 | } | |
591 | vstack_ax(stack)->type = REG_S64; | |
592 | next_pc += sizeof(struct binary_op); | |
593 | break; | |
594 | } | |
595 | ||
80c2a69a | 596 | case BYTECODE_OP_NE: |
07dfc1d0 MD |
597 | { |
598 | struct binary_op *insn = (struct binary_op *) pc; | |
599 | ||
600 | switch(vstack_ax(stack)->type) { | |
601 | default: | |
80c2a69a | 602 | printk(KERN_WARNING "LTTng: bytecode: unknown register type\n"); |
07dfc1d0 MD |
603 | ret = -EINVAL; |
604 | goto end; | |
605 | ||
606 | case REG_STRING: | |
02aca193 | 607 | if (vstack_bx(stack)->type == REG_STAR_GLOB_STRING) |
80c2a69a | 608 | insn->op = BYTECODE_OP_NE_STAR_GLOB_STRING; |
02aca193 | 609 | else |
80c2a69a | 610 | insn->op = BYTECODE_OP_NE_STRING; |
02aca193 PP |
611 | break; |
612 | case REG_STAR_GLOB_STRING: | |
80c2a69a | 613 | insn->op = BYTECODE_OP_NE_STAR_GLOB_STRING; |
07dfc1d0 MD |
614 | break; |
615 | case REG_S64: | |
616 | if (vstack_bx(stack)->type == REG_S64) | |
80c2a69a | 617 | insn->op = BYTECODE_OP_NE_S64; |
07dfc1d0 | 618 | else |
80c2a69a | 619 | insn->op = BYTECODE_OP_NE_DOUBLE_S64; |
07dfc1d0 MD |
620 | break; |
621 | case REG_DOUBLE: | |
622 | if (vstack_bx(stack)->type == REG_S64) | |
80c2a69a | 623 | insn->op = BYTECODE_OP_NE_S64_DOUBLE; |
07dfc1d0 | 624 | else |
80c2a69a | 625 | insn->op = BYTECODE_OP_NE_DOUBLE; |
07dfc1d0 MD |
626 | break; |
627 | } | |
628 | /* Pop 2, push 1 */ | |
629 | if (vstack_pop(stack)) { | |
630 | ret = -EINVAL; | |
631 | goto end; | |
632 | } | |
633 | vstack_ax(stack)->type = REG_S64; | |
634 | next_pc += sizeof(struct binary_op); | |
635 | break; | |
636 | } | |
637 | ||
80c2a69a | 638 | case BYTECODE_OP_GT: |
07dfc1d0 MD |
639 | { |
640 | struct binary_op *insn = (struct binary_op *) pc; | |
641 | ||
642 | switch(vstack_ax(stack)->type) { | |
643 | default: | |
80c2a69a | 644 | printk(KERN_WARNING "LTTng: bytecode: unknown register type\n"); |
07dfc1d0 MD |
645 | ret = -EINVAL; |
646 | goto end; | |
647 | ||
02aca193 | 648 | case REG_STAR_GLOB_STRING: |
80c2a69a | 649 | printk(KERN_WARNING "LTTng: bytecode: invalid register type for '>' binary operator\n"); |
02aca193 PP |
650 | ret = -EINVAL; |
651 | goto end; | |
07dfc1d0 | 652 | case REG_STRING: |
80c2a69a | 653 | insn->op = BYTECODE_OP_GT_STRING; |
07dfc1d0 MD |
654 | break; |
655 | case REG_S64: | |
656 | if (vstack_bx(stack)->type == REG_S64) | |
80c2a69a | 657 | insn->op = BYTECODE_OP_GT_S64; |
07dfc1d0 | 658 | else |
80c2a69a | 659 | insn->op = BYTECODE_OP_GT_DOUBLE_S64; |
07dfc1d0 MD |
660 | break; |
661 | case REG_DOUBLE: | |
662 | if (vstack_bx(stack)->type == REG_S64) | |
80c2a69a | 663 | insn->op = BYTECODE_OP_GT_S64_DOUBLE; |
07dfc1d0 | 664 | else |
80c2a69a | 665 | insn->op = BYTECODE_OP_GT_DOUBLE; |
07dfc1d0 MD |
666 | break; |
667 | } | |
668 | /* Pop 2, push 1 */ | |
669 | if (vstack_pop(stack)) { | |
670 | ret = -EINVAL; | |
671 | goto end; | |
672 | } | |
673 | vstack_ax(stack)->type = REG_S64; | |
674 | next_pc += sizeof(struct binary_op); | |
675 | break; | |
676 | } | |
677 | ||
80c2a69a | 678 | case BYTECODE_OP_LT: |
07dfc1d0 MD |
679 | { |
680 | struct binary_op *insn = (struct binary_op *) pc; | |
681 | ||
682 | switch(vstack_ax(stack)->type) { | |
683 | default: | |
80c2a69a | 684 | printk(KERN_WARNING "LTTng: bytecode: unknown register type\n"); |
07dfc1d0 MD |
685 | ret = -EINVAL; |
686 | goto end; | |
687 | ||
02aca193 | 688 | case REG_STAR_GLOB_STRING: |
80c2a69a | 689 | printk(KERN_WARNING "LTTng: bytecode: invalid register type for '<' binary operator\n"); |
02aca193 PP |
690 | ret = -EINVAL; |
691 | goto end; | |
07dfc1d0 | 692 | case REG_STRING: |
80c2a69a | 693 | insn->op = BYTECODE_OP_LT_STRING; |
07dfc1d0 MD |
694 | break; |
695 | case REG_S64: | |
696 | if (vstack_bx(stack)->type == REG_S64) | |
80c2a69a | 697 | insn->op = BYTECODE_OP_LT_S64; |
07dfc1d0 | 698 | else |
80c2a69a | 699 | insn->op = BYTECODE_OP_LT_DOUBLE_S64; |
07dfc1d0 MD |
700 | break; |
701 | case REG_DOUBLE: | |
702 | if (vstack_bx(stack)->type == REG_S64) | |
80c2a69a | 703 | insn->op = BYTECODE_OP_LT_S64_DOUBLE; |
07dfc1d0 | 704 | else |
80c2a69a | 705 | insn->op = BYTECODE_OP_LT_DOUBLE; |
07dfc1d0 MD |
706 | break; |
707 | } | |
708 | /* Pop 2, push 1 */ | |
709 | if (vstack_pop(stack)) { | |
710 | ret = -EINVAL; | |
711 | goto end; | |
712 | } | |
713 | vstack_ax(stack)->type = REG_S64; | |
714 | next_pc += sizeof(struct binary_op); | |
715 | break; | |
716 | } | |
717 | ||
80c2a69a | 718 | case BYTECODE_OP_GE: |
07dfc1d0 MD |
719 | { |
720 | struct binary_op *insn = (struct binary_op *) pc; | |
721 | ||
722 | switch(vstack_ax(stack)->type) { | |
723 | default: | |
80c2a69a | 724 | printk(KERN_WARNING "LTTng: bytecode: unknown register type\n"); |
07dfc1d0 MD |
725 | ret = -EINVAL; |
726 | goto end; | |
727 | ||
02aca193 | 728 | case REG_STAR_GLOB_STRING: |
80c2a69a | 729 | printk(KERN_WARNING "LTTng: bytecode: invalid register type for '>=' binary operator\n"); |
02aca193 PP |
730 | ret = -EINVAL; |
731 | goto end; | |
07dfc1d0 | 732 | case REG_STRING: |
80c2a69a | 733 | insn->op = BYTECODE_OP_GE_STRING; |
07dfc1d0 MD |
734 | break; |
735 | case REG_S64: | |
736 | if (vstack_bx(stack)->type == REG_S64) | |
80c2a69a | 737 | insn->op = BYTECODE_OP_GE_S64; |
07dfc1d0 | 738 | else |
80c2a69a | 739 | insn->op = BYTECODE_OP_GE_DOUBLE_S64; |
07dfc1d0 MD |
740 | break; |
741 | case REG_DOUBLE: | |
742 | if (vstack_bx(stack)->type == REG_S64) | |
80c2a69a | 743 | insn->op = BYTECODE_OP_GE_S64_DOUBLE; |
07dfc1d0 | 744 | else |
80c2a69a | 745 | insn->op = BYTECODE_OP_GE_DOUBLE; |
07dfc1d0 MD |
746 | break; |
747 | } | |
748 | /* Pop 2, push 1 */ | |
749 | if (vstack_pop(stack)) { | |
750 | ret = -EINVAL; | |
751 | goto end; | |
752 | } | |
753 | vstack_ax(stack)->type = REG_S64; | |
754 | next_pc += sizeof(struct binary_op); | |
755 | break; | |
756 | } | |
80c2a69a | 757 | case BYTECODE_OP_LE: |
07dfc1d0 MD |
758 | { |
759 | struct binary_op *insn = (struct binary_op *) pc; | |
760 | ||
761 | switch(vstack_ax(stack)->type) { | |
762 | default: | |
80c2a69a | 763 | printk(KERN_WARNING "LTTng: bytecode: unknown register type\n"); |
07dfc1d0 MD |
764 | ret = -EINVAL; |
765 | goto end; | |
766 | ||
02aca193 | 767 | case REG_STAR_GLOB_STRING: |
80c2a69a | 768 | printk(KERN_WARNING "LTTng: bytecode: invalid register type for '<=' binary operator\n"); |
02aca193 PP |
769 | ret = -EINVAL; |
770 | goto end; | |
07dfc1d0 | 771 | case REG_STRING: |
80c2a69a | 772 | insn->op = BYTECODE_OP_LE_STRING; |
07dfc1d0 MD |
773 | break; |
774 | case REG_S64: | |
775 | if (vstack_bx(stack)->type == REG_S64) | |
80c2a69a | 776 | insn->op = BYTECODE_OP_LE_S64; |
07dfc1d0 | 777 | else |
80c2a69a | 778 | insn->op = BYTECODE_OP_LE_DOUBLE_S64; |
07dfc1d0 MD |
779 | break; |
780 | case REG_DOUBLE: | |
781 | if (vstack_bx(stack)->type == REG_S64) | |
80c2a69a | 782 | insn->op = BYTECODE_OP_LE_S64_DOUBLE; |
07dfc1d0 | 783 | else |
80c2a69a | 784 | insn->op = BYTECODE_OP_LE_DOUBLE; |
07dfc1d0 MD |
785 | break; |
786 | } | |
787 | vstack_ax(stack)->type = REG_S64; | |
788 | next_pc += sizeof(struct binary_op); | |
789 | break; | |
790 | } | |
791 | ||
80c2a69a FD |
792 | case BYTECODE_OP_EQ_STRING: |
793 | case BYTECODE_OP_NE_STRING: | |
794 | case BYTECODE_OP_GT_STRING: | |
795 | case BYTECODE_OP_LT_STRING: | |
796 | case BYTECODE_OP_GE_STRING: | |
797 | case BYTECODE_OP_LE_STRING: | |
798 | case BYTECODE_OP_EQ_STAR_GLOB_STRING: | |
799 | case BYTECODE_OP_NE_STAR_GLOB_STRING: | |
800 | case BYTECODE_OP_EQ_S64: | |
801 | case BYTECODE_OP_NE_S64: | |
802 | case BYTECODE_OP_GT_S64: | |
803 | case BYTECODE_OP_LT_S64: | |
804 | case BYTECODE_OP_GE_S64: | |
805 | case BYTECODE_OP_LE_S64: | |
806 | case BYTECODE_OP_EQ_DOUBLE: | |
807 | case BYTECODE_OP_NE_DOUBLE: | |
808 | case BYTECODE_OP_GT_DOUBLE: | |
809 | case BYTECODE_OP_LT_DOUBLE: | |
810 | case BYTECODE_OP_GE_DOUBLE: | |
811 | case BYTECODE_OP_LE_DOUBLE: | |
812 | case BYTECODE_OP_EQ_DOUBLE_S64: | |
813 | case BYTECODE_OP_NE_DOUBLE_S64: | |
814 | case BYTECODE_OP_GT_DOUBLE_S64: | |
815 | case BYTECODE_OP_LT_DOUBLE_S64: | |
816 | case BYTECODE_OP_GE_DOUBLE_S64: | |
817 | case BYTECODE_OP_LE_DOUBLE_S64: | |
818 | case BYTECODE_OP_EQ_S64_DOUBLE: | |
819 | case BYTECODE_OP_NE_S64_DOUBLE: | |
820 | case BYTECODE_OP_GT_S64_DOUBLE: | |
821 | case BYTECODE_OP_LT_S64_DOUBLE: | |
822 | case BYTECODE_OP_GE_S64_DOUBLE: | |
823 | case BYTECODE_OP_LE_S64_DOUBLE: | |
824 | case BYTECODE_OP_BIT_RSHIFT: | |
825 | case BYTECODE_OP_BIT_LSHIFT: | |
826 | case BYTECODE_OP_BIT_AND: | |
827 | case BYTECODE_OP_BIT_OR: | |
828 | case BYTECODE_OP_BIT_XOR: | |
07dfc1d0 MD |
829 | { |
830 | /* Pop 2, push 1 */ | |
831 | if (vstack_pop(stack)) { | |
832 | ret = -EINVAL; | |
833 | goto end; | |
834 | } | |
835 | vstack_ax(stack)->type = REG_S64; | |
836 | next_pc += sizeof(struct binary_op); | |
837 | break; | |
838 | } | |
839 | ||
840 | /* unary */ | |
80c2a69a | 841 | case BYTECODE_OP_UNARY_PLUS: |
07dfc1d0 MD |
842 | { |
843 | struct unary_op *insn = (struct unary_op *) pc; | |
844 | ||
845 | switch(vstack_ax(stack)->type) { | |
846 | default: | |
80c2a69a | 847 | printk(KERN_WARNING "LTTng: bytecode: unknown register type\n"); |
07dfc1d0 MD |
848 | ret = -EINVAL; |
849 | goto end; | |
850 | ||
851 | case REG_S64: | |
80c2a69a | 852 | insn->op = BYTECODE_OP_UNARY_PLUS_S64; |
07dfc1d0 MD |
853 | break; |
854 | case REG_DOUBLE: | |
80c2a69a | 855 | insn->op = BYTECODE_OP_UNARY_PLUS_DOUBLE; |
07dfc1d0 MD |
856 | break; |
857 | } | |
858 | /* Pop 1, push 1 */ | |
859 | next_pc += sizeof(struct unary_op); | |
860 | break; | |
861 | } | |
862 | ||
80c2a69a | 863 | case BYTECODE_OP_UNARY_MINUS: |
07dfc1d0 MD |
864 | { |
865 | struct unary_op *insn = (struct unary_op *) pc; | |
866 | ||
867 | switch(vstack_ax(stack)->type) { | |
868 | default: | |
80c2a69a | 869 | printk(KERN_WARNING "LTTng: bytecode: unknown register type\n"); |
07dfc1d0 MD |
870 | ret = -EINVAL; |
871 | goto end; | |
872 | ||
873 | case REG_S64: | |
80c2a69a | 874 | insn->op = BYTECODE_OP_UNARY_MINUS_S64; |
07dfc1d0 MD |
875 | break; |
876 | case REG_DOUBLE: | |
80c2a69a | 877 | insn->op = BYTECODE_OP_UNARY_MINUS_DOUBLE; |
07dfc1d0 MD |
878 | break; |
879 | } | |
880 | /* Pop 1, push 1 */ | |
881 | next_pc += sizeof(struct unary_op); | |
882 | break; | |
883 | } | |
884 | ||
80c2a69a | 885 | case BYTECODE_OP_UNARY_NOT: |
07dfc1d0 MD |
886 | { |
887 | struct unary_op *insn = (struct unary_op *) pc; | |
888 | ||
889 | switch(vstack_ax(stack)->type) { | |
890 | default: | |
80c2a69a | 891 | printk(KERN_WARNING "LTTng: bytecode: unknown register type\n"); |
07dfc1d0 MD |
892 | ret = -EINVAL; |
893 | goto end; | |
894 | ||
895 | case REG_S64: | |
80c2a69a | 896 | insn->op = BYTECODE_OP_UNARY_NOT_S64; |
07dfc1d0 MD |
897 | break; |
898 | case REG_DOUBLE: | |
80c2a69a | 899 | insn->op = BYTECODE_OP_UNARY_NOT_DOUBLE; |
07dfc1d0 MD |
900 | break; |
901 | } | |
902 | /* Pop 1, push 1 */ | |
903 | next_pc += sizeof(struct unary_op); | |
904 | break; | |
905 | } | |
906 | ||
80c2a69a | 907 | case BYTECODE_OP_UNARY_BIT_NOT: |
e16c054b MD |
908 | { |
909 | /* Pop 1, push 1 */ | |
910 | next_pc += sizeof(struct unary_op); | |
911 | break; | |
912 | } | |
913 | ||
80c2a69a FD |
914 | case BYTECODE_OP_UNARY_PLUS_S64: |
915 | case BYTECODE_OP_UNARY_MINUS_S64: | |
916 | case BYTECODE_OP_UNARY_NOT_S64: | |
917 | case BYTECODE_OP_UNARY_PLUS_DOUBLE: | |
918 | case BYTECODE_OP_UNARY_MINUS_DOUBLE: | |
919 | case BYTECODE_OP_UNARY_NOT_DOUBLE: | |
07dfc1d0 MD |
920 | { |
921 | /* Pop 1, push 1 */ | |
922 | next_pc += sizeof(struct unary_op); | |
923 | break; | |
924 | } | |
925 | ||
926 | /* logical */ | |
80c2a69a FD |
927 | case BYTECODE_OP_AND: |
928 | case BYTECODE_OP_OR: | |
07dfc1d0 MD |
929 | { |
930 | /* Continue to next instruction */ | |
931 | /* Pop 1 when jump not taken */ | |
932 | if (vstack_pop(stack)) { | |
933 | ret = -EINVAL; | |
934 | goto end; | |
935 | } | |
936 | next_pc += sizeof(struct logical_op); | |
937 | break; | |
938 | } | |
939 | ||
940 | /* load field ref */ | |
80c2a69a | 941 | case BYTECODE_OP_LOAD_FIELD_REF: |
07dfc1d0 | 942 | { |
80c2a69a | 943 | printk(KERN_WARNING "LTTng: bytecode: Unknown field ref type\n"); |
07dfc1d0 MD |
944 | ret = -EINVAL; |
945 | goto end; | |
946 | } | |
947 | /* get context ref */ | |
80c2a69a | 948 | case BYTECODE_OP_GET_CONTEXT_REF: |
07dfc1d0 | 949 | { |
80c2a69a | 950 | printk(KERN_WARNING "LTTng: bytecode: Unknown get context ref type\n"); |
07dfc1d0 MD |
951 | ret = -EINVAL; |
952 | goto end; | |
953 | } | |
80c2a69a FD |
954 | case BYTECODE_OP_LOAD_FIELD_REF_STRING: |
955 | case BYTECODE_OP_LOAD_FIELD_REF_SEQUENCE: | |
956 | case BYTECODE_OP_GET_CONTEXT_REF_STRING: | |
957 | case BYTECODE_OP_LOAD_FIELD_REF_USER_STRING: | |
958 | case BYTECODE_OP_LOAD_FIELD_REF_USER_SEQUENCE: | |
07dfc1d0 MD |
959 | { |
960 | if (vstack_push(stack)) { | |
961 | ret = -EINVAL; | |
962 | goto end; | |
963 | } | |
964 | vstack_ax(stack)->type = REG_STRING; | |
965 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
966 | break; | |
967 | } | |
80c2a69a FD |
968 | case BYTECODE_OP_LOAD_FIELD_REF_S64: |
969 | case BYTECODE_OP_GET_CONTEXT_REF_S64: | |
07dfc1d0 MD |
970 | { |
971 | if (vstack_push(stack)) { | |
972 | ret = -EINVAL; | |
973 | goto end; | |
974 | } | |
975 | vstack_ax(stack)->type = REG_S64; | |
976 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
977 | break; | |
978 | } | |
80c2a69a FD |
979 | case BYTECODE_OP_LOAD_FIELD_REF_DOUBLE: |
980 | case BYTECODE_OP_GET_CONTEXT_REF_DOUBLE: | |
07dfc1d0 MD |
981 | { |
982 | if (vstack_push(stack)) { | |
983 | ret = -EINVAL; | |
984 | goto end; | |
985 | } | |
986 | vstack_ax(stack)->type = REG_DOUBLE; | |
987 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
988 | break; | |
989 | } | |
990 | ||
991 | /* load from immediate operand */ | |
80c2a69a | 992 | case BYTECODE_OP_LOAD_STRING: |
07dfc1d0 MD |
993 | { |
994 | struct load_op *insn = (struct load_op *) pc; | |
995 | ||
996 | if (vstack_push(stack)) { | |
997 | ret = -EINVAL; | |
998 | goto end; | |
999 | } | |
1000 | vstack_ax(stack)->type = REG_STRING; | |
1001 | next_pc += sizeof(struct load_op) + strlen(insn->data) + 1; | |
1002 | break; | |
1003 | } | |
1004 | ||
80c2a69a | 1005 | case BYTECODE_OP_LOAD_STAR_GLOB_STRING: |
02aca193 PP |
1006 | { |
1007 | struct load_op *insn = (struct load_op *) pc; | |
1008 | ||
1009 | if (vstack_push(stack)) { | |
1010 | ret = -EINVAL; | |
1011 | goto end; | |
1012 | } | |
1013 | vstack_ax(stack)->type = REG_STAR_GLOB_STRING; | |
1014 | next_pc += sizeof(struct load_op) + strlen(insn->data) + 1; | |
1015 | break; | |
1016 | } | |
1017 | ||
80c2a69a | 1018 | case BYTECODE_OP_LOAD_S64: |
07dfc1d0 MD |
1019 | { |
1020 | if (vstack_push(stack)) { | |
1021 | ret = -EINVAL; | |
1022 | goto end; | |
1023 | } | |
1024 | vstack_ax(stack)->type = REG_S64; | |
1025 | next_pc += sizeof(struct load_op) | |
1026 | + sizeof(struct literal_numeric); | |
1027 | break; | |
1028 | } | |
1029 | ||
80c2a69a | 1030 | case BYTECODE_OP_LOAD_DOUBLE: |
07dfc1d0 MD |
1031 | { |
1032 | if (vstack_push(stack)) { | |
1033 | ret = -EINVAL; | |
1034 | goto end; | |
1035 | } | |
1036 | vstack_ax(stack)->type = REG_DOUBLE; | |
1037 | next_pc += sizeof(struct load_op) | |
1038 | + sizeof(struct literal_double); | |
1039 | break; | |
1040 | } | |
1041 | ||
1042 | /* cast */ | |
80c2a69a | 1043 | case BYTECODE_OP_CAST_TO_S64: |
07dfc1d0 MD |
1044 | { |
1045 | struct cast_op *insn = (struct cast_op *) pc; | |
1046 | ||
1047 | switch (vstack_ax(stack)->type) { | |
1048 | default: | |
80c2a69a | 1049 | printk(KERN_WARNING "LTTng: bytecode: unknown register type\n"); |
07dfc1d0 MD |
1050 | ret = -EINVAL; |
1051 | goto end; | |
1052 | ||
1053 | case REG_STRING: | |
02aca193 | 1054 | case REG_STAR_GLOB_STRING: |
80c2a69a | 1055 | printk(KERN_WARNING "LTTng: bytecode: Cast op can only be applied to numeric or floating point registers\n"); |
07dfc1d0 MD |
1056 | ret = -EINVAL; |
1057 | goto end; | |
1058 | case REG_S64: | |
80c2a69a | 1059 | insn->op = BYTECODE_OP_CAST_NOP; |
07dfc1d0 MD |
1060 | break; |
1061 | case REG_DOUBLE: | |
80c2a69a | 1062 | insn->op = BYTECODE_OP_CAST_DOUBLE_TO_S64; |
07dfc1d0 MD |
1063 | break; |
1064 | } | |
1065 | /* Pop 1, push 1 */ | |
1066 | vstack_ax(stack)->type = REG_S64; | |
1067 | next_pc += sizeof(struct cast_op); | |
1068 | break; | |
1069 | } | |
80c2a69a | 1070 | case BYTECODE_OP_CAST_DOUBLE_TO_S64: |
07dfc1d0 MD |
1071 | { |
1072 | /* Pop 1, push 1 */ | |
1073 | vstack_ax(stack)->type = REG_S64; | |
1074 | next_pc += sizeof(struct cast_op); | |
1075 | break; | |
1076 | } | |
80c2a69a | 1077 | case BYTECODE_OP_CAST_NOP: |
07dfc1d0 MD |
1078 | { |
1079 | next_pc += sizeof(struct cast_op); | |
1080 | break; | |
1081 | } | |
1082 | ||
3834b99f MD |
1083 | /* |
1084 | * Instructions for recursive traversal through composed types. | |
1085 | */ | |
80c2a69a | 1086 | case BYTECODE_OP_GET_CONTEXT_ROOT: |
3834b99f MD |
1087 | { |
1088 | if (vstack_push(stack)) { | |
1089 | ret = -EINVAL; | |
1090 | goto end; | |
1091 | } | |
1092 | vstack_ax(stack)->type = REG_PTR; | |
1093 | vstack_ax(stack)->load.type = LOAD_ROOT_CONTEXT; | |
1094 | next_pc += sizeof(struct load_op); | |
1095 | break; | |
1096 | } | |
80c2a69a | 1097 | case BYTECODE_OP_GET_APP_CONTEXT_ROOT: |
3834b99f MD |
1098 | { |
1099 | if (vstack_push(stack)) { | |
1100 | ret = -EINVAL; | |
1101 | goto end; | |
1102 | } | |
1103 | vstack_ax(stack)->type = REG_PTR; | |
1104 | vstack_ax(stack)->load.type = LOAD_ROOT_APP_CONTEXT; | |
1105 | next_pc += sizeof(struct load_op); | |
1106 | break; | |
1107 | } | |
80c2a69a | 1108 | case BYTECODE_OP_GET_PAYLOAD_ROOT: |
3834b99f MD |
1109 | { |
1110 | if (vstack_push(stack)) { | |
1111 | ret = -EINVAL; | |
1112 | goto end; | |
1113 | } | |
1114 | vstack_ax(stack)->type = REG_PTR; | |
1115 | vstack_ax(stack)->load.type = LOAD_ROOT_PAYLOAD; | |
1116 | next_pc += sizeof(struct load_op); | |
1117 | break; | |
1118 | } | |
1119 | ||
80c2a69a | 1120 | case BYTECODE_OP_LOAD_FIELD: |
3834b99f MD |
1121 | { |
1122 | struct load_op *insn = (struct load_op *) pc; | |
1123 | ||
1124 | WARN_ON_ONCE(vstack_ax(stack)->type != REG_PTR); | |
1125 | /* Pop 1, push 1 */ | |
1126 | ret = specialize_load_field(vstack_ax(stack), insn); | |
1127 | if (ret) | |
1128 | goto end; | |
1129 | ||
1130 | next_pc += sizeof(struct load_op); | |
1131 | break; | |
1132 | } | |
1133 | ||
80c2a69a FD |
1134 | case BYTECODE_OP_LOAD_FIELD_S8: |
1135 | case BYTECODE_OP_LOAD_FIELD_S16: | |
1136 | case BYTECODE_OP_LOAD_FIELD_S32: | |
1137 | case BYTECODE_OP_LOAD_FIELD_S64: | |
1138 | case BYTECODE_OP_LOAD_FIELD_U8: | |
1139 | case BYTECODE_OP_LOAD_FIELD_U16: | |
1140 | case BYTECODE_OP_LOAD_FIELD_U32: | |
1141 | case BYTECODE_OP_LOAD_FIELD_U64: | |
3834b99f MD |
1142 | { |
1143 | /* Pop 1, push 1 */ | |
1144 | vstack_ax(stack)->type = REG_S64; | |
1145 | next_pc += sizeof(struct load_op); | |
1146 | break; | |
1147 | } | |
1148 | ||
80c2a69a FD |
1149 | case BYTECODE_OP_LOAD_FIELD_STRING: |
1150 | case BYTECODE_OP_LOAD_FIELD_SEQUENCE: | |
3834b99f MD |
1151 | { |
1152 | /* Pop 1, push 1 */ | |
1153 | vstack_ax(stack)->type = REG_STRING; | |
1154 | next_pc += sizeof(struct load_op); | |
1155 | break; | |
1156 | } | |
1157 | ||
80c2a69a | 1158 | case BYTECODE_OP_LOAD_FIELD_DOUBLE: |
3834b99f MD |
1159 | { |
1160 | /* Pop 1, push 1 */ | |
1161 | vstack_ax(stack)->type = REG_DOUBLE; | |
1162 | next_pc += sizeof(struct load_op); | |
1163 | break; | |
1164 | } | |
1165 | ||
80c2a69a | 1166 | case BYTECODE_OP_GET_SYMBOL: |
3834b99f MD |
1167 | { |
1168 | struct load_op *insn = (struct load_op *) pc; | |
1169 | ||
1170 | dbg_printk("op get symbol\n"); | |
1171 | switch (vstack_ax(stack)->load.type) { | |
1172 | case LOAD_OBJECT: | |
80c2a69a | 1173 | printk(KERN_WARNING "LTTng: bytecode: Nested fields not implemented yet.\n"); |
3834b99f MD |
1174 | ret = -EINVAL; |
1175 | goto end; | |
1176 | case LOAD_ROOT_CONTEXT: | |
1177 | /* Lookup context field. */ | |
2dfda770 | 1178 | ret = specialize_context_lookup(ctx, bytecode, insn, |
3834b99f MD |
1179 | &vstack_ax(stack)->load); |
1180 | if (ret) | |
1181 | goto end; | |
1182 | break; | |
1183 | case LOAD_ROOT_APP_CONTEXT: | |
1184 | ret = -EINVAL; | |
1185 | goto end; | |
1186 | case LOAD_ROOT_PAYLOAD: | |
1187 | /* Lookup event payload field. */ | |
2dfda770 | 1188 | ret = specialize_payload_lookup(event_desc, |
3834b99f MD |
1189 | bytecode, insn, |
1190 | &vstack_ax(stack)->load); | |
1191 | if (ret) | |
1192 | goto end; | |
1193 | break; | |
1194 | } | |
1195 | next_pc += sizeof(struct load_op) + sizeof(struct get_symbol); | |
1196 | break; | |
1197 | } | |
1198 | ||
80c2a69a | 1199 | case BYTECODE_OP_GET_SYMBOL_FIELD: |
3834b99f MD |
1200 | { |
1201 | /* Always generated by specialize phase. */ | |
1202 | ret = -EINVAL; | |
1203 | goto end; | |
1204 | } | |
1205 | ||
80c2a69a | 1206 | case BYTECODE_OP_GET_INDEX_U16: |
3834b99f MD |
1207 | { |
1208 | struct load_op *insn = (struct load_op *) pc; | |
1209 | struct get_index_u16 *index = (struct get_index_u16 *) insn->data; | |
1210 | ||
1211 | dbg_printk("op get index u16\n"); | |
1212 | /* Pop 1, push 1 */ | |
1213 | ret = specialize_get_index(bytecode, insn, index->index, | |
1214 | vstack_ax(stack), sizeof(*index)); | |
1215 | if (ret) | |
1216 | goto end; | |
1217 | next_pc += sizeof(struct load_op) + sizeof(struct get_index_u16); | |
1218 | break; | |
1219 | } | |
1220 | ||
80c2a69a | 1221 | case BYTECODE_OP_GET_INDEX_U64: |
3834b99f MD |
1222 | { |
1223 | struct load_op *insn = (struct load_op *) pc; | |
1224 | struct get_index_u64 *index = (struct get_index_u64 *) insn->data; | |
1225 | ||
1226 | dbg_printk("op get index u64\n"); | |
1227 | /* Pop 1, push 1 */ | |
1228 | ret = specialize_get_index(bytecode, insn, index->index, | |
1229 | vstack_ax(stack), sizeof(*index)); | |
1230 | if (ret) | |
1231 | goto end; | |
1232 | next_pc += sizeof(struct load_op) + sizeof(struct get_index_u64); | |
1233 | break; | |
1234 | } | |
1235 | ||
07dfc1d0 MD |
1236 | } |
1237 | } | |
1238 | end: | |
1239 | return ret; | |
1240 | } |