| 1 | /* SPDX-License-Identifier: MIT |
| 2 | * |
| 3 | * lttng-filter-specialize.c |
| 4 | * |
| 5 | * LTTng modules filter code specializer. |
| 6 | * |
| 7 | * Copyright (C) 2010-2016 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
| 8 | */ |
| 9 | |
| 10 | #include <linux/slab.h> |
| 11 | #include <lttng/filter.h> |
| 12 | #include <lttng/align.h> |
| 13 | |
| 14 | static ssize_t bytecode_reserve_data(struct bytecode_runtime *runtime, |
| 15 | size_t align, size_t len) |
| 16 | { |
| 17 | ssize_t ret; |
| 18 | size_t padding = offset_align(runtime->data_len, align); |
| 19 | size_t new_len = runtime->data_len + padding + len; |
| 20 | size_t new_alloc_len = new_len; |
| 21 | size_t old_alloc_len = runtime->data_alloc_len; |
| 22 | |
| 23 | if (new_len > FILTER_MAX_DATA_LEN) |
| 24 | return -EINVAL; |
| 25 | |
| 26 | if (new_alloc_len > old_alloc_len) { |
| 27 | char *newptr; |
| 28 | |
| 29 | new_alloc_len = |
| 30 | max_t(size_t, 1U << get_count_order(new_alloc_len), old_alloc_len << 1); |
| 31 | newptr = krealloc(runtime->data, new_alloc_len, GFP_KERNEL); |
| 32 | if (!newptr) |
| 33 | return -ENOMEM; |
| 34 | runtime->data = newptr; |
| 35 | /* We zero directly the memory from start of allocation. */ |
| 36 | memset(&runtime->data[old_alloc_len], 0, new_alloc_len - old_alloc_len); |
| 37 | runtime->data_alloc_len = new_alloc_len; |
| 38 | } |
| 39 | runtime->data_len += padding; |
| 40 | ret = runtime->data_len; |
| 41 | runtime->data_len += len; |
| 42 | return ret; |
| 43 | } |
| 44 | |
| 45 | static ssize_t bytecode_push_data(struct bytecode_runtime *runtime, |
| 46 | const void *p, size_t align, size_t len) |
| 47 | { |
| 48 | ssize_t offset; |
| 49 | |
| 50 | offset = bytecode_reserve_data(runtime, align, len); |
| 51 | if (offset < 0) |
| 52 | return -ENOMEM; |
| 53 | memcpy(&runtime->data[offset], p, len); |
| 54 | return offset; |
| 55 | } |
| 56 | |
| 57 | static int specialize_load_field(struct vstack_entry *stack_top, |
| 58 | struct load_op *insn) |
| 59 | { |
| 60 | int ret; |
| 61 | |
| 62 | switch (stack_top->load.type) { |
| 63 | case LOAD_OBJECT: |
| 64 | break; |
| 65 | case LOAD_ROOT_CONTEXT: |
| 66 | case LOAD_ROOT_APP_CONTEXT: |
| 67 | case LOAD_ROOT_PAYLOAD: |
| 68 | default: |
| 69 | dbg_printk("Filter warning: cannot load root, missing field name.\n"); |
| 70 | ret = -EINVAL; |
| 71 | goto end; |
| 72 | } |
| 73 | switch (stack_top->load.object_type) { |
| 74 | case OBJECT_TYPE_S8: |
| 75 | dbg_printk("op load field s8\n"); |
| 76 | stack_top->type = REG_S64; |
| 77 | if (!stack_top->load.rev_bo) |
| 78 | insn->op = FILTER_OP_LOAD_FIELD_S8; |
| 79 | break; |
| 80 | case OBJECT_TYPE_S16: |
| 81 | dbg_printk("op load field s16\n"); |
| 82 | stack_top->type = REG_S64; |
| 83 | if (!stack_top->load.rev_bo) |
| 84 | insn->op = FILTER_OP_LOAD_FIELD_S16; |
| 85 | break; |
| 86 | case OBJECT_TYPE_S32: |
| 87 | dbg_printk("op load field s32\n"); |
| 88 | stack_top->type = REG_S64; |
| 89 | if (!stack_top->load.rev_bo) |
| 90 | insn->op = FILTER_OP_LOAD_FIELD_S32; |
| 91 | break; |
| 92 | case OBJECT_TYPE_S64: |
| 93 | dbg_printk("op load field s64\n"); |
| 94 | stack_top->type = REG_S64; |
| 95 | if (!stack_top->load.rev_bo) |
| 96 | insn->op = FILTER_OP_LOAD_FIELD_S64; |
| 97 | break; |
| 98 | case OBJECT_TYPE_U8: |
| 99 | dbg_printk("op load field u8\n"); |
| 100 | stack_top->type = REG_S64; |
| 101 | insn->op = FILTER_OP_LOAD_FIELD_U8; |
| 102 | break; |
| 103 | case OBJECT_TYPE_U16: |
| 104 | dbg_printk("op load field u16\n"); |
| 105 | stack_top->type = REG_S64; |
| 106 | if (!stack_top->load.rev_bo) |
| 107 | insn->op = FILTER_OP_LOAD_FIELD_U16; |
| 108 | break; |
| 109 | case OBJECT_TYPE_U32: |
| 110 | dbg_printk("op load field u32\n"); |
| 111 | stack_top->type = REG_S64; |
| 112 | if (!stack_top->load.rev_bo) |
| 113 | insn->op = FILTER_OP_LOAD_FIELD_U32; |
| 114 | break; |
| 115 | case OBJECT_TYPE_U64: |
| 116 | dbg_printk("op load field u64\n"); |
| 117 | stack_top->type = REG_S64; |
| 118 | if (!stack_top->load.rev_bo) |
| 119 | insn->op = FILTER_OP_LOAD_FIELD_U64; |
| 120 | break; |
| 121 | case OBJECT_TYPE_DOUBLE: |
| 122 | printk(KERN_WARNING "LTTng: filter: Double type unsupported\n\n"); |
| 123 | ret = -EINVAL; |
| 124 | goto end; |
| 125 | case OBJECT_TYPE_STRING: |
| 126 | dbg_printk("op load field string\n"); |
| 127 | stack_top->type = REG_STRING; |
| 128 | insn->op = FILTER_OP_LOAD_FIELD_STRING; |
| 129 | break; |
| 130 | case OBJECT_TYPE_STRING_SEQUENCE: |
| 131 | dbg_printk("op load field string sequence\n"); |
| 132 | stack_top->type = REG_STRING; |
| 133 | insn->op = FILTER_OP_LOAD_FIELD_SEQUENCE; |
| 134 | break; |
| 135 | case OBJECT_TYPE_DYNAMIC: |
| 136 | ret = -EINVAL; |
| 137 | goto end; |
| 138 | case OBJECT_TYPE_SEQUENCE: |
| 139 | case OBJECT_TYPE_ARRAY: |
| 140 | case OBJECT_TYPE_STRUCT: |
| 141 | case OBJECT_TYPE_VARIANT: |
| 142 | printk(KERN_WARNING "LTTng: filter: Sequences, arrays, struct and variant cannot be loaded (nested types).\n"); |
| 143 | ret = -EINVAL; |
| 144 | goto end; |
| 145 | } |
| 146 | return 0; |
| 147 | |
| 148 | end: |
| 149 | return ret; |
| 150 | } |
| 151 | |
| 152 | static int specialize_get_index_object_type(enum object_type *otype, |
| 153 | int signedness, uint32_t elem_len) |
| 154 | { |
| 155 | switch (elem_len) { |
| 156 | case 8: |
| 157 | if (signedness) |
| 158 | *otype = OBJECT_TYPE_S8; |
| 159 | else |
| 160 | *otype = OBJECT_TYPE_U8; |
| 161 | break; |
| 162 | case 16: |
| 163 | if (signedness) |
| 164 | *otype = OBJECT_TYPE_S16; |
| 165 | else |
| 166 | *otype = OBJECT_TYPE_U16; |
| 167 | break; |
| 168 | case 32: |
| 169 | if (signedness) |
| 170 | *otype = OBJECT_TYPE_S32; |
| 171 | else |
| 172 | *otype = OBJECT_TYPE_U32; |
| 173 | break; |
| 174 | case 64: |
| 175 | if (signedness) |
| 176 | *otype = OBJECT_TYPE_S64; |
| 177 | else |
| 178 | *otype = OBJECT_TYPE_U64; |
| 179 | break; |
| 180 | default: |
| 181 | return -EINVAL; |
| 182 | } |
| 183 | return 0; |
| 184 | } |
| 185 | |
| 186 | static int specialize_get_index(struct bytecode_runtime *runtime, |
| 187 | struct load_op *insn, uint64_t index, |
| 188 | struct vstack_entry *stack_top, |
| 189 | int idx_len) |
| 190 | { |
| 191 | int ret; |
| 192 | struct filter_get_index_data gid; |
| 193 | ssize_t data_offset; |
| 194 | |
| 195 | memset(&gid, 0, sizeof(gid)); |
| 196 | switch (stack_top->load.type) { |
| 197 | case LOAD_OBJECT: |
| 198 | switch (stack_top->load.object_type) { |
| 199 | case OBJECT_TYPE_ARRAY: |
| 200 | { |
| 201 | const struct lttng_integer_type *integer_type; |
| 202 | const struct lttng_event_field *field; |
| 203 | uint32_t elem_len, num_elems; |
| 204 | int signedness; |
| 205 | |
| 206 | field = stack_top->load.field; |
| 207 | if (!lttng_is_bytewise_integer(field->type.u.array_nestable.elem_type)) { |
| 208 | ret = -EINVAL; |
| 209 | goto end; |
| 210 | } |
| 211 | integer_type = &field->type.u.array_nestable.elem_type->u.integer; |
| 212 | num_elems = field->type.u.array_nestable.length; |
| 213 | elem_len = integer_type->size; |
| 214 | signedness = integer_type->signedness; |
| 215 | if (index >= num_elems) { |
| 216 | ret = -EINVAL; |
| 217 | goto end; |
| 218 | } |
| 219 | ret = specialize_get_index_object_type(&stack_top->load.object_type, |
| 220 | signedness, elem_len); |
| 221 | if (ret) |
| 222 | goto end; |
| 223 | gid.offset = index * (elem_len / CHAR_BIT); |
| 224 | gid.array_len = num_elems * (elem_len / CHAR_BIT); |
| 225 | gid.elem.type = stack_top->load.object_type; |
| 226 | gid.elem.len = elem_len; |
| 227 | if (integer_type->reverse_byte_order) |
| 228 | gid.elem.rev_bo = true; |
| 229 | stack_top->load.rev_bo = gid.elem.rev_bo; |
| 230 | break; |
| 231 | } |
| 232 | case OBJECT_TYPE_SEQUENCE: |
| 233 | { |
| 234 | const struct lttng_integer_type *integer_type; |
| 235 | const struct lttng_event_field *field; |
| 236 | uint32_t elem_len; |
| 237 | int signedness; |
| 238 | |
| 239 | field = stack_top->load.field; |
| 240 | if (!lttng_is_bytewise_integer(field->type.u.sequence_nestable.elem_type)) { |
| 241 | ret = -EINVAL; |
| 242 | goto end; |
| 243 | } |
| 244 | integer_type = &field->type.u.sequence_nestable.elem_type->u.integer; |
| 245 | elem_len = integer_type->size; |
| 246 | signedness = integer_type->signedness; |
| 247 | ret = specialize_get_index_object_type(&stack_top->load.object_type, |
| 248 | signedness, elem_len); |
| 249 | if (ret) |
| 250 | goto end; |
| 251 | gid.offset = index * (elem_len / CHAR_BIT); |
| 252 | gid.elem.type = stack_top->load.object_type; |
| 253 | gid.elem.len = elem_len; |
| 254 | if (integer_type->reverse_byte_order) |
| 255 | gid.elem.rev_bo = true; |
| 256 | stack_top->load.rev_bo = gid.elem.rev_bo; |
| 257 | break; |
| 258 | } |
| 259 | case OBJECT_TYPE_STRUCT: |
| 260 | /* Only generated by the specialize phase. */ |
| 261 | case OBJECT_TYPE_VARIANT: /* Fall-through */ |
| 262 | default: |
| 263 | printk(KERN_WARNING "LTTng: filter: Unexpected get index type %d", |
| 264 | (int) stack_top->load.object_type); |
| 265 | ret = -EINVAL; |
| 266 | goto end; |
| 267 | } |
| 268 | break; |
| 269 | case LOAD_ROOT_CONTEXT: |
| 270 | case LOAD_ROOT_APP_CONTEXT: |
| 271 | case LOAD_ROOT_PAYLOAD: |
| 272 | printk(KERN_WARNING "LTTng: filter: Index lookup for root field not implemented yet.\n"); |
| 273 | ret = -EINVAL; |
| 274 | goto end; |
| 275 | } |
| 276 | data_offset = bytecode_push_data(runtime, &gid, |
| 277 | __alignof__(gid), sizeof(gid)); |
| 278 | if (data_offset < 0) { |
| 279 | ret = -EINVAL; |
| 280 | goto end; |
| 281 | } |
| 282 | switch (idx_len) { |
| 283 | case 2: |
| 284 | ((struct get_index_u16 *) insn->data)->index = data_offset; |
| 285 | break; |
| 286 | case 8: |
| 287 | ((struct get_index_u64 *) insn->data)->index = data_offset; |
| 288 | break; |
| 289 | default: |
| 290 | ret = -EINVAL; |
| 291 | goto end; |
| 292 | } |
| 293 | |
| 294 | return 0; |
| 295 | |
| 296 | end: |
| 297 | return ret; |
| 298 | } |
| 299 | |
| 300 | static int specialize_context_lookup_name(struct lttng_ctx *ctx, |
| 301 | struct bytecode_runtime *bytecode, |
| 302 | struct load_op *insn) |
| 303 | { |
| 304 | uint16_t offset; |
| 305 | const char *name; |
| 306 | |
| 307 | offset = ((struct get_symbol *) insn->data)->offset; |
| 308 | name = bytecode->p.bc->bc.data + bytecode->p.bc->bc.reloc_offset + offset; |
| 309 | return lttng_get_context_index(ctx, name); |
| 310 | } |
| 311 | |
| 312 | static int specialize_load_object(const struct lttng_event_field *field, |
| 313 | struct vstack_load *load, bool is_context) |
| 314 | { |
| 315 | load->type = LOAD_OBJECT; |
| 316 | /* |
| 317 | * LTTng-UST layout all integer fields as s64 on the stack for the filter. |
| 318 | */ |
| 319 | switch (field->type.atype) { |
| 320 | case atype_integer: |
| 321 | if (field->type.u.integer.signedness) |
| 322 | load->object_type = OBJECT_TYPE_S64; |
| 323 | else |
| 324 | load->object_type = OBJECT_TYPE_U64; |
| 325 | load->rev_bo = false; |
| 326 | break; |
| 327 | case atype_enum_nestable: |
| 328 | { |
| 329 | const struct lttng_integer_type *itype = |
| 330 | &field->type.u.enum_nestable.container_type->u.integer; |
| 331 | |
| 332 | if (itype->signedness) |
| 333 | load->object_type = OBJECT_TYPE_S64; |
| 334 | else |
| 335 | load->object_type = OBJECT_TYPE_U64; |
| 336 | load->rev_bo = false; |
| 337 | break; |
| 338 | } |
| 339 | case atype_array_nestable: |
| 340 | if (!lttng_is_bytewise_integer(field->type.u.array_nestable.elem_type)) { |
| 341 | printk(KERN_WARNING "LTTng: filter Array nesting only supports integer types.\n"); |
| 342 | return -EINVAL; |
| 343 | } |
| 344 | if (is_context) { |
| 345 | load->object_type = OBJECT_TYPE_STRING; |
| 346 | } else { |
| 347 | if (field->type.u.array_nestable.elem_type->u.integer.encoding == lttng_encode_none) { |
| 348 | load->object_type = OBJECT_TYPE_ARRAY; |
| 349 | load->field = field; |
| 350 | } else { |
| 351 | load->object_type = OBJECT_TYPE_STRING_SEQUENCE; |
| 352 | } |
| 353 | } |
| 354 | break; |
| 355 | case atype_sequence_nestable: |
| 356 | if (!lttng_is_bytewise_integer(field->type.u.sequence_nestable.elem_type)) { |
| 357 | printk(KERN_WARNING "LTTng: filter Sequence nesting only supports integer types.\n"); |
| 358 | return -EINVAL; |
| 359 | } |
| 360 | if (is_context) { |
| 361 | load->object_type = OBJECT_TYPE_STRING; |
| 362 | } else { |
| 363 | if (field->type.u.sequence_nestable.elem_type->u.integer.encoding == lttng_encode_none) { |
| 364 | load->object_type = OBJECT_TYPE_SEQUENCE; |
| 365 | load->field = field; |
| 366 | } else { |
| 367 | load->object_type = OBJECT_TYPE_STRING_SEQUENCE; |
| 368 | } |
| 369 | } |
| 370 | break; |
| 371 | case atype_string: |
| 372 | load->object_type = OBJECT_TYPE_STRING; |
| 373 | break; |
| 374 | case atype_struct_nestable: |
| 375 | printk(KERN_WARNING "LTTng: filter: Structure type cannot be loaded.\n"); |
| 376 | return -EINVAL; |
| 377 | case atype_variant_nestable: |
| 378 | printk(KERN_WARNING "LTTng: filter: Variant type cannot be loaded.\n"); |
| 379 | return -EINVAL; |
| 380 | default: |
| 381 | printk(KERN_WARNING "LTTng: filter: Unknown type: %d", (int) field->type.atype); |
| 382 | return -EINVAL; |
| 383 | } |
| 384 | return 0; |
| 385 | } |
| 386 | |
| 387 | static int specialize_context_lookup(struct lttng_ctx *ctx, |
| 388 | struct bytecode_runtime *runtime, |
| 389 | struct load_op *insn, |
| 390 | struct vstack_load *load) |
| 391 | { |
| 392 | int idx, ret; |
| 393 | struct lttng_ctx_field *ctx_field; |
| 394 | struct lttng_event_field *field; |
| 395 | struct filter_get_index_data gid; |
| 396 | ssize_t data_offset; |
| 397 | |
| 398 | idx = specialize_context_lookup_name(ctx, runtime, insn); |
| 399 | if (idx < 0) { |
| 400 | return -ENOENT; |
| 401 | } |
| 402 | ctx_field = <tng_static_ctx->fields[idx]; |
| 403 | field = &ctx_field->event_field; |
| 404 | ret = specialize_load_object(field, load, true); |
| 405 | if (ret) |
| 406 | return ret; |
| 407 | /* Specialize each get_symbol into a get_index. */ |
| 408 | insn->op = FILTER_OP_GET_INDEX_U16; |
| 409 | memset(&gid, 0, sizeof(gid)); |
| 410 | gid.ctx_index = idx; |
| 411 | gid.elem.type = load->object_type; |
| 412 | data_offset = bytecode_push_data(runtime, &gid, |
| 413 | __alignof__(gid), sizeof(gid)); |
| 414 | if (data_offset < 0) { |
| 415 | return -EINVAL; |
| 416 | } |
| 417 | ((struct get_index_u16 *) insn->data)->index = data_offset; |
| 418 | return 0; |
| 419 | } |
| 420 | |
| 421 | static int specialize_payload_lookup(const struct lttng_event_desc *event_desc, |
| 422 | struct bytecode_runtime *runtime, |
| 423 | struct load_op *insn, |
| 424 | struct vstack_load *load) |
| 425 | { |
| 426 | const char *name; |
| 427 | uint16_t offset; |
| 428 | unsigned int i, nr_fields; |
| 429 | bool found = false; |
| 430 | uint32_t field_offset = 0; |
| 431 | const struct lttng_event_field *field; |
| 432 | int ret; |
| 433 | struct filter_get_index_data gid; |
| 434 | ssize_t data_offset; |
| 435 | |
| 436 | nr_fields = event_desc->nr_fields; |
| 437 | offset = ((struct get_symbol *) insn->data)->offset; |
| 438 | name = runtime->p.bc->bc.data + runtime->p.bc->bc.reloc_offset + offset; |
| 439 | for (i = 0; i < nr_fields; i++) { |
| 440 | field = &event_desc->fields[i]; |
| 441 | if (field->nofilter) { |
| 442 | continue; |
| 443 | } |
| 444 | if (!strcmp(field->name, name)) { |
| 445 | found = true; |
| 446 | break; |
| 447 | } |
| 448 | /* compute field offset on stack */ |
| 449 | switch (field->type.atype) { |
| 450 | case atype_integer: |
| 451 | case atype_enum_nestable: |
| 452 | field_offset += sizeof(int64_t); |
| 453 | break; |
| 454 | case atype_array_nestable: |
| 455 | case atype_sequence_nestable: |
| 456 | field_offset += sizeof(unsigned long); |
| 457 | field_offset += sizeof(void *); |
| 458 | break; |
| 459 | case atype_string: |
| 460 | field_offset += sizeof(void *); |
| 461 | break; |
| 462 | default: |
| 463 | ret = -EINVAL; |
| 464 | goto end; |
| 465 | } |
| 466 | } |
| 467 | if (!found) { |
| 468 | ret = -EINVAL; |
| 469 | goto end; |
| 470 | } |
| 471 | |
| 472 | ret = specialize_load_object(field, load, false); |
| 473 | if (ret) |
| 474 | goto end; |
| 475 | |
| 476 | /* Specialize each get_symbol into a get_index. */ |
| 477 | insn->op = FILTER_OP_GET_INDEX_U16; |
| 478 | memset(&gid, 0, sizeof(gid)); |
| 479 | gid.offset = field_offset; |
| 480 | gid.elem.type = load->object_type; |
| 481 | data_offset = bytecode_push_data(runtime, &gid, |
| 482 | __alignof__(gid), sizeof(gid)); |
| 483 | if (data_offset < 0) { |
| 484 | ret = -EINVAL; |
| 485 | goto end; |
| 486 | } |
| 487 | ((struct get_index_u16 *) insn->data)->index = data_offset; |
| 488 | ret = 0; |
| 489 | end: |
| 490 | return ret; |
| 491 | } |
| 492 | |
| 493 | int lttng_filter_specialize_bytecode(const struct lttng_event_desc *event_desc, |
| 494 | struct bytecode_runtime *bytecode) |
| 495 | { |
| 496 | void *pc, *next_pc, *start_pc; |
| 497 | int ret = -EINVAL; |
| 498 | struct vstack _stack; |
| 499 | struct vstack *stack = &_stack; |
| 500 | struct lttng_ctx *ctx = bytecode->p.ctx; |
| 501 | |
| 502 | vstack_init(stack); |
| 503 | |
| 504 | start_pc = &bytecode->code[0]; |
| 505 | for (pc = next_pc = start_pc; pc - start_pc < bytecode->len; |
| 506 | pc = next_pc) { |
| 507 | switch (*(filter_opcode_t *) pc) { |
| 508 | case FILTER_OP_UNKNOWN: |
| 509 | default: |
| 510 | printk(KERN_WARNING "LTTng: filter: unknown bytecode op %u\n", |
| 511 | (unsigned int) *(filter_opcode_t *) pc); |
| 512 | ret = -EINVAL; |
| 513 | goto end; |
| 514 | |
| 515 | case FILTER_OP_RETURN: |
| 516 | case FILTER_OP_RETURN_S64: |
| 517 | ret = 0; |
| 518 | goto end; |
| 519 | |
| 520 | /* binary */ |
| 521 | case FILTER_OP_MUL: |
| 522 | case FILTER_OP_DIV: |
| 523 | case FILTER_OP_MOD: |
| 524 | case FILTER_OP_PLUS: |
| 525 | case FILTER_OP_MINUS: |
| 526 | printk(KERN_WARNING "LTTng: filter: unsupported bytecode op %u\n", |
| 527 | (unsigned int) *(filter_opcode_t *) pc); |
| 528 | ret = -EINVAL; |
| 529 | goto end; |
| 530 | |
| 531 | case FILTER_OP_EQ: |
| 532 | { |
| 533 | struct binary_op *insn = (struct binary_op *) pc; |
| 534 | |
| 535 | switch(vstack_ax(stack)->type) { |
| 536 | default: |
| 537 | printk(KERN_WARNING "LTTng: filter: unknown register type\n"); |
| 538 | ret = -EINVAL; |
| 539 | goto end; |
| 540 | |
| 541 | case REG_STRING: |
| 542 | if (vstack_bx(stack)->type == REG_STAR_GLOB_STRING) |
| 543 | insn->op = FILTER_OP_EQ_STAR_GLOB_STRING; |
| 544 | else |
| 545 | insn->op = FILTER_OP_EQ_STRING; |
| 546 | break; |
| 547 | case REG_STAR_GLOB_STRING: |
| 548 | insn->op = FILTER_OP_EQ_STAR_GLOB_STRING; |
| 549 | break; |
| 550 | case REG_S64: |
| 551 | if (vstack_bx(stack)->type == REG_S64) |
| 552 | insn->op = FILTER_OP_EQ_S64; |
| 553 | else |
| 554 | insn->op = FILTER_OP_EQ_DOUBLE_S64; |
| 555 | break; |
| 556 | case REG_DOUBLE: |
| 557 | if (vstack_bx(stack)->type == REG_S64) |
| 558 | insn->op = FILTER_OP_EQ_S64_DOUBLE; |
| 559 | else |
| 560 | insn->op = FILTER_OP_EQ_DOUBLE; |
| 561 | break; |
| 562 | } |
| 563 | /* Pop 2, push 1 */ |
| 564 | if (vstack_pop(stack)) { |
| 565 | ret = -EINVAL; |
| 566 | goto end; |
| 567 | } |
| 568 | vstack_ax(stack)->type = REG_S64; |
| 569 | next_pc += sizeof(struct binary_op); |
| 570 | break; |
| 571 | } |
| 572 | |
| 573 | case FILTER_OP_NE: |
| 574 | { |
| 575 | struct binary_op *insn = (struct binary_op *) pc; |
| 576 | |
| 577 | switch(vstack_ax(stack)->type) { |
| 578 | default: |
| 579 | printk(KERN_WARNING "LTTng: filter: unknown register type\n"); |
| 580 | ret = -EINVAL; |
| 581 | goto end; |
| 582 | |
| 583 | case REG_STRING: |
| 584 | if (vstack_bx(stack)->type == REG_STAR_GLOB_STRING) |
| 585 | insn->op = FILTER_OP_NE_STAR_GLOB_STRING; |
| 586 | else |
| 587 | insn->op = FILTER_OP_NE_STRING; |
| 588 | break; |
| 589 | case REG_STAR_GLOB_STRING: |
| 590 | insn->op = FILTER_OP_NE_STAR_GLOB_STRING; |
| 591 | break; |
| 592 | case REG_S64: |
| 593 | if (vstack_bx(stack)->type == REG_S64) |
| 594 | insn->op = FILTER_OP_NE_S64; |
| 595 | else |
| 596 | insn->op = FILTER_OP_NE_DOUBLE_S64; |
| 597 | break; |
| 598 | case REG_DOUBLE: |
| 599 | if (vstack_bx(stack)->type == REG_S64) |
| 600 | insn->op = FILTER_OP_NE_S64_DOUBLE; |
| 601 | else |
| 602 | insn->op = FILTER_OP_NE_DOUBLE; |
| 603 | break; |
| 604 | } |
| 605 | /* Pop 2, push 1 */ |
| 606 | if (vstack_pop(stack)) { |
| 607 | ret = -EINVAL; |
| 608 | goto end; |
| 609 | } |
| 610 | vstack_ax(stack)->type = REG_S64; |
| 611 | next_pc += sizeof(struct binary_op); |
| 612 | break; |
| 613 | } |
| 614 | |
| 615 | case FILTER_OP_GT: |
| 616 | { |
| 617 | struct binary_op *insn = (struct binary_op *) pc; |
| 618 | |
| 619 | switch(vstack_ax(stack)->type) { |
| 620 | default: |
| 621 | printk(KERN_WARNING "LTTng: filter: unknown register type\n"); |
| 622 | ret = -EINVAL; |
| 623 | goto end; |
| 624 | |
| 625 | case REG_STAR_GLOB_STRING: |
| 626 | printk(KERN_WARNING "LTTng: filter: invalid register type for '>' binary operator\n"); |
| 627 | ret = -EINVAL; |
| 628 | goto end; |
| 629 | case REG_STRING: |
| 630 | insn->op = FILTER_OP_GT_STRING; |
| 631 | break; |
| 632 | case REG_S64: |
| 633 | if (vstack_bx(stack)->type == REG_S64) |
| 634 | insn->op = FILTER_OP_GT_S64; |
| 635 | else |
| 636 | insn->op = FILTER_OP_GT_DOUBLE_S64; |
| 637 | break; |
| 638 | case REG_DOUBLE: |
| 639 | if (vstack_bx(stack)->type == REG_S64) |
| 640 | insn->op = FILTER_OP_GT_S64_DOUBLE; |
| 641 | else |
| 642 | insn->op = FILTER_OP_GT_DOUBLE; |
| 643 | break; |
| 644 | } |
| 645 | /* Pop 2, push 1 */ |
| 646 | if (vstack_pop(stack)) { |
| 647 | ret = -EINVAL; |
| 648 | goto end; |
| 649 | } |
| 650 | vstack_ax(stack)->type = REG_S64; |
| 651 | next_pc += sizeof(struct binary_op); |
| 652 | break; |
| 653 | } |
| 654 | |
| 655 | case FILTER_OP_LT: |
| 656 | { |
| 657 | struct binary_op *insn = (struct binary_op *) pc; |
| 658 | |
| 659 | switch(vstack_ax(stack)->type) { |
| 660 | default: |
| 661 | printk(KERN_WARNING "LTTng: filter: unknown register type\n"); |
| 662 | ret = -EINVAL; |
| 663 | goto end; |
| 664 | |
| 665 | case REG_STAR_GLOB_STRING: |
| 666 | printk(KERN_WARNING "LTTng: filter: invalid register type for '<' binary operator\n"); |
| 667 | ret = -EINVAL; |
| 668 | goto end; |
| 669 | case REG_STRING: |
| 670 | insn->op = FILTER_OP_LT_STRING; |
| 671 | break; |
| 672 | case REG_S64: |
| 673 | if (vstack_bx(stack)->type == REG_S64) |
| 674 | insn->op = FILTER_OP_LT_S64; |
| 675 | else |
| 676 | insn->op = FILTER_OP_LT_DOUBLE_S64; |
| 677 | break; |
| 678 | case REG_DOUBLE: |
| 679 | if (vstack_bx(stack)->type == REG_S64) |
| 680 | insn->op = FILTER_OP_LT_S64_DOUBLE; |
| 681 | else |
| 682 | insn->op = FILTER_OP_LT_DOUBLE; |
| 683 | break; |
| 684 | } |
| 685 | /* Pop 2, push 1 */ |
| 686 | if (vstack_pop(stack)) { |
| 687 | ret = -EINVAL; |
| 688 | goto end; |
| 689 | } |
| 690 | vstack_ax(stack)->type = REG_S64; |
| 691 | next_pc += sizeof(struct binary_op); |
| 692 | break; |
| 693 | } |
| 694 | |
| 695 | case FILTER_OP_GE: |
| 696 | { |
| 697 | struct binary_op *insn = (struct binary_op *) pc; |
| 698 | |
| 699 | switch(vstack_ax(stack)->type) { |
| 700 | default: |
| 701 | printk(KERN_WARNING "LTTng: filter: unknown register type\n"); |
| 702 | ret = -EINVAL; |
| 703 | goto end; |
| 704 | |
| 705 | case REG_STAR_GLOB_STRING: |
| 706 | printk(KERN_WARNING "LTTng: filter: invalid register type for '>=' binary operator\n"); |
| 707 | ret = -EINVAL; |
| 708 | goto end; |
| 709 | case REG_STRING: |
| 710 | insn->op = FILTER_OP_GE_STRING; |
| 711 | break; |
| 712 | case REG_S64: |
| 713 | if (vstack_bx(stack)->type == REG_S64) |
| 714 | insn->op = FILTER_OP_GE_S64; |
| 715 | else |
| 716 | insn->op = FILTER_OP_GE_DOUBLE_S64; |
| 717 | break; |
| 718 | case REG_DOUBLE: |
| 719 | if (vstack_bx(stack)->type == REG_S64) |
| 720 | insn->op = FILTER_OP_GE_S64_DOUBLE; |
| 721 | else |
| 722 | insn->op = FILTER_OP_GE_DOUBLE; |
| 723 | break; |
| 724 | } |
| 725 | /* Pop 2, push 1 */ |
| 726 | if (vstack_pop(stack)) { |
| 727 | ret = -EINVAL; |
| 728 | goto end; |
| 729 | } |
| 730 | vstack_ax(stack)->type = REG_S64; |
| 731 | next_pc += sizeof(struct binary_op); |
| 732 | break; |
| 733 | } |
| 734 | case FILTER_OP_LE: |
| 735 | { |
| 736 | struct binary_op *insn = (struct binary_op *) pc; |
| 737 | |
| 738 | switch(vstack_ax(stack)->type) { |
| 739 | default: |
| 740 | printk(KERN_WARNING "LTTng: filter: unknown register type\n"); |
| 741 | ret = -EINVAL; |
| 742 | goto end; |
| 743 | |
| 744 | case REG_STAR_GLOB_STRING: |
| 745 | printk(KERN_WARNING "LTTng: filter: invalid register type for '<=' binary operator\n"); |
| 746 | ret = -EINVAL; |
| 747 | goto end; |
| 748 | case REG_STRING: |
| 749 | insn->op = FILTER_OP_LE_STRING; |
| 750 | break; |
| 751 | case REG_S64: |
| 752 | if (vstack_bx(stack)->type == REG_S64) |
| 753 | insn->op = FILTER_OP_LE_S64; |
| 754 | else |
| 755 | insn->op = FILTER_OP_LE_DOUBLE_S64; |
| 756 | break; |
| 757 | case REG_DOUBLE: |
| 758 | if (vstack_bx(stack)->type == REG_S64) |
| 759 | insn->op = FILTER_OP_LE_S64_DOUBLE; |
| 760 | else |
| 761 | insn->op = FILTER_OP_LE_DOUBLE; |
| 762 | break; |
| 763 | } |
| 764 | vstack_ax(stack)->type = REG_S64; |
| 765 | next_pc += sizeof(struct binary_op); |
| 766 | break; |
| 767 | } |
| 768 | |
| 769 | case FILTER_OP_EQ_STRING: |
| 770 | case FILTER_OP_NE_STRING: |
| 771 | case FILTER_OP_GT_STRING: |
| 772 | case FILTER_OP_LT_STRING: |
| 773 | case FILTER_OP_GE_STRING: |
| 774 | case FILTER_OP_LE_STRING: |
| 775 | case FILTER_OP_EQ_STAR_GLOB_STRING: |
| 776 | case FILTER_OP_NE_STAR_GLOB_STRING: |
| 777 | case FILTER_OP_EQ_S64: |
| 778 | case FILTER_OP_NE_S64: |
| 779 | case FILTER_OP_GT_S64: |
| 780 | case FILTER_OP_LT_S64: |
| 781 | case FILTER_OP_GE_S64: |
| 782 | case FILTER_OP_LE_S64: |
| 783 | case FILTER_OP_EQ_DOUBLE: |
| 784 | case FILTER_OP_NE_DOUBLE: |
| 785 | case FILTER_OP_GT_DOUBLE: |
| 786 | case FILTER_OP_LT_DOUBLE: |
| 787 | case FILTER_OP_GE_DOUBLE: |
| 788 | case FILTER_OP_LE_DOUBLE: |
| 789 | case FILTER_OP_EQ_DOUBLE_S64: |
| 790 | case FILTER_OP_NE_DOUBLE_S64: |
| 791 | case FILTER_OP_GT_DOUBLE_S64: |
| 792 | case FILTER_OP_LT_DOUBLE_S64: |
| 793 | case FILTER_OP_GE_DOUBLE_S64: |
| 794 | case FILTER_OP_LE_DOUBLE_S64: |
| 795 | case FILTER_OP_EQ_S64_DOUBLE: |
| 796 | case FILTER_OP_NE_S64_DOUBLE: |
| 797 | case FILTER_OP_GT_S64_DOUBLE: |
| 798 | case FILTER_OP_LT_S64_DOUBLE: |
| 799 | case FILTER_OP_GE_S64_DOUBLE: |
| 800 | case FILTER_OP_LE_S64_DOUBLE: |
| 801 | case FILTER_OP_BIT_RSHIFT: |
| 802 | case FILTER_OP_BIT_LSHIFT: |
| 803 | case FILTER_OP_BIT_AND: |
| 804 | case FILTER_OP_BIT_OR: |
| 805 | case FILTER_OP_BIT_XOR: |
| 806 | { |
| 807 | /* Pop 2, push 1 */ |
| 808 | if (vstack_pop(stack)) { |
| 809 | ret = -EINVAL; |
| 810 | goto end; |
| 811 | } |
| 812 | vstack_ax(stack)->type = REG_S64; |
| 813 | next_pc += sizeof(struct binary_op); |
| 814 | break; |
| 815 | } |
| 816 | |
| 817 | /* unary */ |
| 818 | case FILTER_OP_UNARY_PLUS: |
| 819 | { |
| 820 | struct unary_op *insn = (struct unary_op *) pc; |
| 821 | |
| 822 | switch(vstack_ax(stack)->type) { |
| 823 | default: |
| 824 | printk(KERN_WARNING "LTTng: filter: unknown register type\n"); |
| 825 | ret = -EINVAL; |
| 826 | goto end; |
| 827 | |
| 828 | case REG_S64: |
| 829 | insn->op = FILTER_OP_UNARY_PLUS_S64; |
| 830 | break; |
| 831 | case REG_DOUBLE: |
| 832 | insn->op = FILTER_OP_UNARY_PLUS_DOUBLE; |
| 833 | break; |
| 834 | } |
| 835 | /* Pop 1, push 1 */ |
| 836 | next_pc += sizeof(struct unary_op); |
| 837 | break; |
| 838 | } |
| 839 | |
| 840 | case FILTER_OP_UNARY_MINUS: |
| 841 | { |
| 842 | struct unary_op *insn = (struct unary_op *) pc; |
| 843 | |
| 844 | switch(vstack_ax(stack)->type) { |
| 845 | default: |
| 846 | printk(KERN_WARNING "LTTng: filter: unknown register type\n"); |
| 847 | ret = -EINVAL; |
| 848 | goto end; |
| 849 | |
| 850 | case REG_S64: |
| 851 | insn->op = FILTER_OP_UNARY_MINUS_S64; |
| 852 | break; |
| 853 | case REG_DOUBLE: |
| 854 | insn->op = FILTER_OP_UNARY_MINUS_DOUBLE; |
| 855 | break; |
| 856 | } |
| 857 | /* Pop 1, push 1 */ |
| 858 | next_pc += sizeof(struct unary_op); |
| 859 | break; |
| 860 | } |
| 861 | |
| 862 | case FILTER_OP_UNARY_NOT: |
| 863 | { |
| 864 | struct unary_op *insn = (struct unary_op *) pc; |
| 865 | |
| 866 | switch(vstack_ax(stack)->type) { |
| 867 | default: |
| 868 | printk(KERN_WARNING "LTTng: filter: unknown register type\n"); |
| 869 | ret = -EINVAL; |
| 870 | goto end; |
| 871 | |
| 872 | case REG_S64: |
| 873 | insn->op = FILTER_OP_UNARY_NOT_S64; |
| 874 | break; |
| 875 | case REG_DOUBLE: |
| 876 | insn->op = FILTER_OP_UNARY_NOT_DOUBLE; |
| 877 | break; |
| 878 | } |
| 879 | /* Pop 1, push 1 */ |
| 880 | next_pc += sizeof(struct unary_op); |
| 881 | break; |
| 882 | } |
| 883 | |
| 884 | case FILTER_OP_UNARY_BIT_NOT: |
| 885 | { |
| 886 | /* Pop 1, push 1 */ |
| 887 | next_pc += sizeof(struct unary_op); |
| 888 | break; |
| 889 | } |
| 890 | |
| 891 | case FILTER_OP_UNARY_PLUS_S64: |
| 892 | case FILTER_OP_UNARY_MINUS_S64: |
| 893 | case FILTER_OP_UNARY_NOT_S64: |
| 894 | case FILTER_OP_UNARY_PLUS_DOUBLE: |
| 895 | case FILTER_OP_UNARY_MINUS_DOUBLE: |
| 896 | case FILTER_OP_UNARY_NOT_DOUBLE: |
| 897 | { |
| 898 | /* Pop 1, push 1 */ |
| 899 | next_pc += sizeof(struct unary_op); |
| 900 | break; |
| 901 | } |
| 902 | |
| 903 | /* logical */ |
| 904 | case FILTER_OP_AND: |
| 905 | case FILTER_OP_OR: |
| 906 | { |
| 907 | /* Continue to next instruction */ |
| 908 | /* Pop 1 when jump not taken */ |
| 909 | if (vstack_pop(stack)) { |
| 910 | ret = -EINVAL; |
| 911 | goto end; |
| 912 | } |
| 913 | next_pc += sizeof(struct logical_op); |
| 914 | break; |
| 915 | } |
| 916 | |
| 917 | /* load field ref */ |
| 918 | case FILTER_OP_LOAD_FIELD_REF: |
| 919 | { |
| 920 | printk(KERN_WARNING "LTTng: filter: Unknown field ref type\n"); |
| 921 | ret = -EINVAL; |
| 922 | goto end; |
| 923 | } |
| 924 | /* get context ref */ |
| 925 | case FILTER_OP_GET_CONTEXT_REF: |
| 926 | { |
| 927 | printk(KERN_WARNING "LTTng: filter: Unknown get context ref type\n"); |
| 928 | ret = -EINVAL; |
| 929 | goto end; |
| 930 | } |
| 931 | case FILTER_OP_LOAD_FIELD_REF_STRING: |
| 932 | case FILTER_OP_LOAD_FIELD_REF_SEQUENCE: |
| 933 | case FILTER_OP_GET_CONTEXT_REF_STRING: |
| 934 | case FILTER_OP_LOAD_FIELD_REF_USER_STRING: |
| 935 | case FILTER_OP_LOAD_FIELD_REF_USER_SEQUENCE: |
| 936 | { |
| 937 | if (vstack_push(stack)) { |
| 938 | ret = -EINVAL; |
| 939 | goto end; |
| 940 | } |
| 941 | vstack_ax(stack)->type = REG_STRING; |
| 942 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); |
| 943 | break; |
| 944 | } |
| 945 | case FILTER_OP_LOAD_FIELD_REF_S64: |
| 946 | case FILTER_OP_GET_CONTEXT_REF_S64: |
| 947 | { |
| 948 | if (vstack_push(stack)) { |
| 949 | ret = -EINVAL; |
| 950 | goto end; |
| 951 | } |
| 952 | vstack_ax(stack)->type = REG_S64; |
| 953 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); |
| 954 | break; |
| 955 | } |
| 956 | case FILTER_OP_LOAD_FIELD_REF_DOUBLE: |
| 957 | case FILTER_OP_GET_CONTEXT_REF_DOUBLE: |
| 958 | { |
| 959 | if (vstack_push(stack)) { |
| 960 | ret = -EINVAL; |
| 961 | goto end; |
| 962 | } |
| 963 | vstack_ax(stack)->type = REG_DOUBLE; |
| 964 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); |
| 965 | break; |
| 966 | } |
| 967 | |
| 968 | /* load from immediate operand */ |
| 969 | case FILTER_OP_LOAD_STRING: |
| 970 | { |
| 971 | struct load_op *insn = (struct load_op *) pc; |
| 972 | |
| 973 | if (vstack_push(stack)) { |
| 974 | ret = -EINVAL; |
| 975 | goto end; |
| 976 | } |
| 977 | vstack_ax(stack)->type = REG_STRING; |
| 978 | next_pc += sizeof(struct load_op) + strlen(insn->data) + 1; |
| 979 | break; |
| 980 | } |
| 981 | |
| 982 | case FILTER_OP_LOAD_STAR_GLOB_STRING: |
| 983 | { |
| 984 | struct load_op *insn = (struct load_op *) pc; |
| 985 | |
| 986 | if (vstack_push(stack)) { |
| 987 | ret = -EINVAL; |
| 988 | goto end; |
| 989 | } |
| 990 | vstack_ax(stack)->type = REG_STAR_GLOB_STRING; |
| 991 | next_pc += sizeof(struct load_op) + strlen(insn->data) + 1; |
| 992 | break; |
| 993 | } |
| 994 | |
| 995 | case FILTER_OP_LOAD_S64: |
| 996 | { |
| 997 | if (vstack_push(stack)) { |
| 998 | ret = -EINVAL; |
| 999 | goto end; |
| 1000 | } |
| 1001 | vstack_ax(stack)->type = REG_S64; |
| 1002 | next_pc += sizeof(struct load_op) |
| 1003 | + sizeof(struct literal_numeric); |
| 1004 | break; |
| 1005 | } |
| 1006 | |
| 1007 | case FILTER_OP_LOAD_DOUBLE: |
| 1008 | { |
| 1009 | if (vstack_push(stack)) { |
| 1010 | ret = -EINVAL; |
| 1011 | goto end; |
| 1012 | } |
| 1013 | vstack_ax(stack)->type = REG_DOUBLE; |
| 1014 | next_pc += sizeof(struct load_op) |
| 1015 | + sizeof(struct literal_double); |
| 1016 | break; |
| 1017 | } |
| 1018 | |
| 1019 | /* cast */ |
| 1020 | case FILTER_OP_CAST_TO_S64: |
| 1021 | { |
| 1022 | struct cast_op *insn = (struct cast_op *) pc; |
| 1023 | |
| 1024 | switch (vstack_ax(stack)->type) { |
| 1025 | default: |
| 1026 | printk(KERN_WARNING "LTTng: filter: unknown register type\n"); |
| 1027 | ret = -EINVAL; |
| 1028 | goto end; |
| 1029 | |
| 1030 | case REG_STRING: |
| 1031 | case REG_STAR_GLOB_STRING: |
| 1032 | printk(KERN_WARNING "LTTng: filter: Cast op can only be applied to numeric or floating point registers\n"); |
| 1033 | ret = -EINVAL; |
| 1034 | goto end; |
| 1035 | case REG_S64: |
| 1036 | insn->op = FILTER_OP_CAST_NOP; |
| 1037 | break; |
| 1038 | case REG_DOUBLE: |
| 1039 | insn->op = FILTER_OP_CAST_DOUBLE_TO_S64; |
| 1040 | break; |
| 1041 | } |
| 1042 | /* Pop 1, push 1 */ |
| 1043 | vstack_ax(stack)->type = REG_S64; |
| 1044 | next_pc += sizeof(struct cast_op); |
| 1045 | break; |
| 1046 | } |
| 1047 | case FILTER_OP_CAST_DOUBLE_TO_S64: |
| 1048 | { |
| 1049 | /* Pop 1, push 1 */ |
| 1050 | vstack_ax(stack)->type = REG_S64; |
| 1051 | next_pc += sizeof(struct cast_op); |
| 1052 | break; |
| 1053 | } |
| 1054 | case FILTER_OP_CAST_NOP: |
| 1055 | { |
| 1056 | next_pc += sizeof(struct cast_op); |
| 1057 | break; |
| 1058 | } |
| 1059 | |
| 1060 | /* |
| 1061 | * Instructions for recursive traversal through composed types. |
| 1062 | */ |
| 1063 | case FILTER_OP_GET_CONTEXT_ROOT: |
| 1064 | { |
| 1065 | if (vstack_push(stack)) { |
| 1066 | ret = -EINVAL; |
| 1067 | goto end; |
| 1068 | } |
| 1069 | vstack_ax(stack)->type = REG_PTR; |
| 1070 | vstack_ax(stack)->load.type = LOAD_ROOT_CONTEXT; |
| 1071 | next_pc += sizeof(struct load_op); |
| 1072 | break; |
| 1073 | } |
| 1074 | case FILTER_OP_GET_APP_CONTEXT_ROOT: |
| 1075 | { |
| 1076 | if (vstack_push(stack)) { |
| 1077 | ret = -EINVAL; |
| 1078 | goto end; |
| 1079 | } |
| 1080 | vstack_ax(stack)->type = REG_PTR; |
| 1081 | vstack_ax(stack)->load.type = LOAD_ROOT_APP_CONTEXT; |
| 1082 | next_pc += sizeof(struct load_op); |
| 1083 | break; |
| 1084 | } |
| 1085 | case FILTER_OP_GET_PAYLOAD_ROOT: |
| 1086 | { |
| 1087 | if (vstack_push(stack)) { |
| 1088 | ret = -EINVAL; |
| 1089 | goto end; |
| 1090 | } |
| 1091 | vstack_ax(stack)->type = REG_PTR; |
| 1092 | vstack_ax(stack)->load.type = LOAD_ROOT_PAYLOAD; |
| 1093 | next_pc += sizeof(struct load_op); |
| 1094 | break; |
| 1095 | } |
| 1096 | |
| 1097 | case FILTER_OP_LOAD_FIELD: |
| 1098 | { |
| 1099 | struct load_op *insn = (struct load_op *) pc; |
| 1100 | |
| 1101 | WARN_ON_ONCE(vstack_ax(stack)->type != REG_PTR); |
| 1102 | /* Pop 1, push 1 */ |
| 1103 | ret = specialize_load_field(vstack_ax(stack), insn); |
| 1104 | if (ret) |
| 1105 | goto end; |
| 1106 | |
| 1107 | next_pc += sizeof(struct load_op); |
| 1108 | break; |
| 1109 | } |
| 1110 | |
| 1111 | case FILTER_OP_LOAD_FIELD_S8: |
| 1112 | case FILTER_OP_LOAD_FIELD_S16: |
| 1113 | case FILTER_OP_LOAD_FIELD_S32: |
| 1114 | case FILTER_OP_LOAD_FIELD_S64: |
| 1115 | case FILTER_OP_LOAD_FIELD_U8: |
| 1116 | case FILTER_OP_LOAD_FIELD_U16: |
| 1117 | case FILTER_OP_LOAD_FIELD_U32: |
| 1118 | case FILTER_OP_LOAD_FIELD_U64: |
| 1119 | { |
| 1120 | /* Pop 1, push 1 */ |
| 1121 | vstack_ax(stack)->type = REG_S64; |
| 1122 | next_pc += sizeof(struct load_op); |
| 1123 | break; |
| 1124 | } |
| 1125 | |
| 1126 | case FILTER_OP_LOAD_FIELD_STRING: |
| 1127 | case FILTER_OP_LOAD_FIELD_SEQUENCE: |
| 1128 | { |
| 1129 | /* Pop 1, push 1 */ |
| 1130 | vstack_ax(stack)->type = REG_STRING; |
| 1131 | next_pc += sizeof(struct load_op); |
| 1132 | break; |
| 1133 | } |
| 1134 | |
| 1135 | case FILTER_OP_LOAD_FIELD_DOUBLE: |
| 1136 | { |
| 1137 | /* Pop 1, push 1 */ |
| 1138 | vstack_ax(stack)->type = REG_DOUBLE; |
| 1139 | next_pc += sizeof(struct load_op); |
| 1140 | break; |
| 1141 | } |
| 1142 | |
| 1143 | case FILTER_OP_GET_SYMBOL: |
| 1144 | { |
| 1145 | struct load_op *insn = (struct load_op *) pc; |
| 1146 | |
| 1147 | dbg_printk("op get symbol\n"); |
| 1148 | switch (vstack_ax(stack)->load.type) { |
| 1149 | case LOAD_OBJECT: |
| 1150 | printk(KERN_WARNING "LTTng: filter: Nested fields not implemented yet.\n"); |
| 1151 | ret = -EINVAL; |
| 1152 | goto end; |
| 1153 | case LOAD_ROOT_CONTEXT: |
| 1154 | /* Lookup context field. */ |
| 1155 | ret = specialize_context_lookup(ctx, bytecode, insn, |
| 1156 | &vstack_ax(stack)->load); |
| 1157 | if (ret) |
| 1158 | goto end; |
| 1159 | break; |
| 1160 | case LOAD_ROOT_APP_CONTEXT: |
| 1161 | ret = -EINVAL; |
| 1162 | goto end; |
| 1163 | case LOAD_ROOT_PAYLOAD: |
| 1164 | /* Lookup event payload field. */ |
| 1165 | ret = specialize_payload_lookup(event_desc, |
| 1166 | bytecode, insn, |
| 1167 | &vstack_ax(stack)->load); |
| 1168 | if (ret) |
| 1169 | goto end; |
| 1170 | break; |
| 1171 | } |
| 1172 | next_pc += sizeof(struct load_op) + sizeof(struct get_symbol); |
| 1173 | break; |
| 1174 | } |
| 1175 | |
| 1176 | case FILTER_OP_GET_SYMBOL_FIELD: |
| 1177 | { |
| 1178 | /* Always generated by specialize phase. */ |
| 1179 | ret = -EINVAL; |
| 1180 | goto end; |
| 1181 | } |
| 1182 | |
| 1183 | case FILTER_OP_GET_INDEX_U16: |
| 1184 | { |
| 1185 | struct load_op *insn = (struct load_op *) pc; |
| 1186 | struct get_index_u16 *index = (struct get_index_u16 *) insn->data; |
| 1187 | |
| 1188 | dbg_printk("op get index u16\n"); |
| 1189 | /* Pop 1, push 1 */ |
| 1190 | ret = specialize_get_index(bytecode, insn, index->index, |
| 1191 | vstack_ax(stack), sizeof(*index)); |
| 1192 | if (ret) |
| 1193 | goto end; |
| 1194 | next_pc += sizeof(struct load_op) + sizeof(struct get_index_u16); |
| 1195 | break; |
| 1196 | } |
| 1197 | |
| 1198 | case FILTER_OP_GET_INDEX_U64: |
| 1199 | { |
| 1200 | struct load_op *insn = (struct load_op *) pc; |
| 1201 | struct get_index_u64 *index = (struct get_index_u64 *) insn->data; |
| 1202 | |
| 1203 | dbg_printk("op get index u64\n"); |
| 1204 | /* Pop 1, push 1 */ |
| 1205 | ret = specialize_get_index(bytecode, insn, index->index, |
| 1206 | vstack_ax(stack), sizeof(*index)); |
| 1207 | if (ret) |
| 1208 | goto end; |
| 1209 | next_pc += sizeof(struct load_op) + sizeof(struct get_index_u64); |
| 1210 | break; |
| 1211 | } |
| 1212 | |
| 1213 | } |
| 1214 | } |
| 1215 | end: |
| 1216 | return ret; |
| 1217 | } |