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