| 1 | /* |
| 2 | * lttng-filter-specialize.c |
| 3 | * |
| 4 | * LTTng modules filter code specializer. |
| 5 | * |
| 6 | * Copyright (C) 2010-2016 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
| 7 | * |
| 8 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
| 9 | * of this software and associated documentation files (the "Software"), to deal |
| 10 | * in the Software without restriction, including without limitation the rights |
| 11 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| 12 | * copies of the Software, and to permit persons to whom the Software is |
| 13 | * furnished to do so, subject to the following conditions: |
| 14 | * |
| 15 | * The above copyright notice and this permission notice shall be included in |
| 16 | * all copies or substantial portions of the Software. |
| 17 | * |
| 18 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 19 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 20 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| 21 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| 22 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| 23 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| 24 | * SOFTWARE. |
| 25 | */ |
| 26 | |
| 27 | #include <linux/slab.h> |
| 28 | #include <lttng-filter.h> |
| 29 | #include "lib/align.h" |
| 30 | |
| 31 | static ssize_t bytecode_reserve_data(struct bytecode_runtime *runtime, |
| 32 | size_t align, size_t len) |
| 33 | { |
| 34 | ssize_t ret; |
| 35 | size_t padding = offset_align(runtime->data_len, align); |
| 36 | size_t new_len = runtime->data_len + padding + len; |
| 37 | size_t new_alloc_len = new_len; |
| 38 | size_t old_alloc_len = runtime->data_alloc_len; |
| 39 | |
| 40 | if (new_len > FILTER_MAX_DATA_LEN) |
| 41 | return -EINVAL; |
| 42 | |
| 43 | if (new_alloc_len > old_alloc_len) { |
| 44 | char *newptr; |
| 45 | |
| 46 | new_alloc_len = |
| 47 | max_t(size_t, 1U << get_count_order(new_alloc_len), old_alloc_len << 1); |
| 48 | newptr = krealloc(runtime->data, new_alloc_len, GFP_KERNEL); |
| 49 | if (!newptr) |
| 50 | return -ENOMEM; |
| 51 | runtime->data = newptr; |
| 52 | /* We zero directly the memory from start of allocation. */ |
| 53 | memset(&runtime->data[old_alloc_len], 0, new_alloc_len - old_alloc_len); |
| 54 | runtime->data_alloc_len = new_alloc_len; |
| 55 | } |
| 56 | runtime->data_len += padding; |
| 57 | ret = runtime->data_len; |
| 58 | runtime->data_len += len; |
| 59 | return ret; |
| 60 | } |
| 61 | |
| 62 | static ssize_t bytecode_push_data(struct bytecode_runtime *runtime, |
| 63 | const void *p, size_t align, size_t len) |
| 64 | { |
| 65 | ssize_t offset; |
| 66 | |
| 67 | offset = bytecode_reserve_data(runtime, align, len); |
| 68 | if (offset < 0) |
| 69 | return -ENOMEM; |
| 70 | memcpy(&runtime->data[offset], p, len); |
| 71 | return offset; |
| 72 | } |
| 73 | |
| 74 | static int specialize_load_field(struct vstack_entry *stack_top, |
| 75 | struct load_op *insn) |
| 76 | { |
| 77 | int ret; |
| 78 | |
| 79 | switch (stack_top->load.type) { |
| 80 | case LOAD_OBJECT: |
| 81 | break; |
| 82 | case LOAD_ROOT_CONTEXT: |
| 83 | case LOAD_ROOT_APP_CONTEXT: |
| 84 | case LOAD_ROOT_PAYLOAD: |
| 85 | default: |
| 86 | dbg_printk("Filter warning: cannot load root, missing field name.\n"); |
| 87 | ret = -EINVAL; |
| 88 | goto end; |
| 89 | } |
| 90 | switch (stack_top->load.object_type) { |
| 91 | case OBJECT_TYPE_S8: |
| 92 | dbg_printk("op load field s8\n"); |
| 93 | stack_top->type = REG_S64; |
| 94 | if (!stack_top->load.rev_bo) |
| 95 | insn->op = FILTER_OP_LOAD_FIELD_S8; |
| 96 | break; |
| 97 | case OBJECT_TYPE_S16: |
| 98 | dbg_printk("op load field s16\n"); |
| 99 | stack_top->type = REG_S64; |
| 100 | if (!stack_top->load.rev_bo) |
| 101 | insn->op = FILTER_OP_LOAD_FIELD_S16; |
| 102 | break; |
| 103 | case OBJECT_TYPE_S32: |
| 104 | dbg_printk("op load field s32\n"); |
| 105 | stack_top->type = REG_S64; |
| 106 | if (!stack_top->load.rev_bo) |
| 107 | insn->op = FILTER_OP_LOAD_FIELD_S32; |
| 108 | break; |
| 109 | case OBJECT_TYPE_S64: |
| 110 | dbg_printk("op load field s64\n"); |
| 111 | stack_top->type = REG_S64; |
| 112 | if (!stack_top->load.rev_bo) |
| 113 | insn->op = FILTER_OP_LOAD_FIELD_S64; |
| 114 | break; |
| 115 | case OBJECT_TYPE_U8: |
| 116 | dbg_printk("op load field u8\n"); |
| 117 | stack_top->type = REG_S64; |
| 118 | insn->op = FILTER_OP_LOAD_FIELD_U8; |
| 119 | break; |
| 120 | case OBJECT_TYPE_U16: |
| 121 | dbg_printk("op load field u16\n"); |
| 122 | stack_top->type = REG_S64; |
| 123 | if (!stack_top->load.rev_bo) |
| 124 | insn->op = FILTER_OP_LOAD_FIELD_U16; |
| 125 | break; |
| 126 | case OBJECT_TYPE_U32: |
| 127 | dbg_printk("op load field u32\n"); |
| 128 | stack_top->type = REG_S64; |
| 129 | if (!stack_top->load.rev_bo) |
| 130 | insn->op = FILTER_OP_LOAD_FIELD_U32; |
| 131 | break; |
| 132 | case OBJECT_TYPE_U64: |
| 133 | dbg_printk("op load field u64\n"); |
| 134 | stack_top->type = REG_S64; |
| 135 | if (!stack_top->load.rev_bo) |
| 136 | insn->op = FILTER_OP_LOAD_FIELD_U64; |
| 137 | break; |
| 138 | case OBJECT_TYPE_DOUBLE: |
| 139 | printk(KERN_WARNING "Double type unsupported\n\n"); |
| 140 | ret = -EINVAL; |
| 141 | goto end; |
| 142 | case OBJECT_TYPE_STRING: |
| 143 | dbg_printk("op load field string\n"); |
| 144 | stack_top->type = REG_STRING; |
| 145 | insn->op = FILTER_OP_LOAD_FIELD_STRING; |
| 146 | break; |
| 147 | case OBJECT_TYPE_STRING_SEQUENCE: |
| 148 | dbg_printk("op load field string sequence\n"); |
| 149 | stack_top->type = REG_STRING; |
| 150 | insn->op = FILTER_OP_LOAD_FIELD_SEQUENCE; |
| 151 | break; |
| 152 | case OBJECT_TYPE_DYNAMIC: |
| 153 | ret = -EINVAL; |
| 154 | goto end; |
| 155 | case OBJECT_TYPE_SEQUENCE: |
| 156 | case OBJECT_TYPE_ARRAY: |
| 157 | case OBJECT_TYPE_STRUCT: |
| 158 | case OBJECT_TYPE_VARIANT: |
| 159 | printk(KERN_WARNING "Sequences, arrays, struct and variant cannot be loaded (nested types).\n"); |
| 160 | ret = -EINVAL; |
| 161 | goto end; |
| 162 | } |
| 163 | return 0; |
| 164 | |
| 165 | end: |
| 166 | return ret; |
| 167 | } |
| 168 | |
| 169 | static int specialize_get_index_object_type(enum object_type *otype, |
| 170 | int signedness, uint32_t elem_len) |
| 171 | { |
| 172 | switch (elem_len) { |
| 173 | case 8: |
| 174 | if (signedness) |
| 175 | *otype = OBJECT_TYPE_S8; |
| 176 | else |
| 177 | *otype = OBJECT_TYPE_U8; |
| 178 | break; |
| 179 | case 16: |
| 180 | if (signedness) |
| 181 | *otype = OBJECT_TYPE_S16; |
| 182 | else |
| 183 | *otype = OBJECT_TYPE_U16; |
| 184 | break; |
| 185 | case 32: |
| 186 | if (signedness) |
| 187 | *otype = OBJECT_TYPE_S32; |
| 188 | else |
| 189 | *otype = OBJECT_TYPE_U32; |
| 190 | break; |
| 191 | case 64: |
| 192 | if (signedness) |
| 193 | *otype = OBJECT_TYPE_S64; |
| 194 | else |
| 195 | *otype = OBJECT_TYPE_U64; |
| 196 | break; |
| 197 | default: |
| 198 | return -EINVAL; |
| 199 | } |
| 200 | return 0; |
| 201 | } |
| 202 | |
| 203 | static int specialize_get_index(struct bytecode_runtime *runtime, |
| 204 | struct load_op *insn, uint64_t index, |
| 205 | struct vstack_entry *stack_top, |
| 206 | int idx_len) |
| 207 | { |
| 208 | int ret; |
| 209 | struct filter_get_index_data gid; |
| 210 | ssize_t data_offset; |
| 211 | |
| 212 | memset(&gid, 0, sizeof(gid)); |
| 213 | switch (stack_top->load.type) { |
| 214 | case LOAD_OBJECT: |
| 215 | switch (stack_top->load.object_type) { |
| 216 | case OBJECT_TYPE_ARRAY: |
| 217 | { |
| 218 | const struct lttng_event_field *field; |
| 219 | uint32_t elem_len, num_elems; |
| 220 | int signedness; |
| 221 | |
| 222 | field = stack_top->load.field; |
| 223 | elem_len = field->type.u.array.elem_type.u.basic.integer.size; |
| 224 | signedness = field->type.u.array.elem_type.u.basic.integer.signedness; |
| 225 | num_elems = field->type.u.array.length; |
| 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; |
| 238 | if (field->type.u.array.elem_type.u.basic.integer.reverse_byte_order) |
| 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 | { |
| 245 | const struct lttng_event_field *field; |
| 246 | uint32_t elem_len; |
| 247 | int signedness; |
| 248 | |
| 249 | field = stack_top->load.field; |
| 250 | elem_len = field->type.u.sequence.elem_type.u.basic.integer.size; |
| 251 | signedness = field->type.u.sequence.elem_type.u.basic.integer.signedness; |
| 252 | ret = specialize_get_index_object_type(&stack_top->load.object_type, |
| 253 | signedness, elem_len); |
| 254 | if (ret) |
| 255 | goto end; |
| 256 | gid.offset = index * (elem_len / CHAR_BIT); |
| 257 | gid.elem.type = stack_top->load.object_type; |
| 258 | gid.elem.len = elem_len; |
| 259 | if (field->type.u.sequence.elem_type.u.basic.integer.reverse_byte_order) |
| 260 | gid.elem.rev_bo = true; |
| 261 | stack_top->load.rev_bo = gid.elem.rev_bo; |
| 262 | break; |
| 263 | } |
| 264 | case OBJECT_TYPE_STRUCT: |
| 265 | /* Only generated by the specialize phase. */ |
| 266 | case OBJECT_TYPE_VARIANT: /* Fall-through */ |
| 267 | default: |
| 268 | printk(KERN_WARNING "Unexpected get index type %d", |
| 269 | (int) stack_top->load.object_type); |
| 270 | ret = -EINVAL; |
| 271 | goto end; |
| 272 | } |
| 273 | break; |
| 274 | case LOAD_ROOT_CONTEXT: |
| 275 | case LOAD_ROOT_APP_CONTEXT: |
| 276 | case LOAD_ROOT_PAYLOAD: |
| 277 | printk(KERN_WARNING "Index lookup for root field not implemented yet.\n"); |
| 278 | ret = -EINVAL; |
| 279 | goto end; |
| 280 | } |
| 281 | data_offset = bytecode_push_data(runtime, &gid, |
| 282 | __alignof__(gid), sizeof(gid)); |
| 283 | if (data_offset < 0) { |
| 284 | ret = -EINVAL; |
| 285 | goto end; |
| 286 | } |
| 287 | switch (idx_len) { |
| 288 | case 2: |
| 289 | ((struct get_index_u16 *) insn->data)->index = data_offset; |
| 290 | break; |
| 291 | case 8: |
| 292 | ((struct get_index_u64 *) insn->data)->index = data_offset; |
| 293 | break; |
| 294 | default: |
| 295 | ret = -EINVAL; |
| 296 | goto end; |
| 297 | } |
| 298 | |
| 299 | return 0; |
| 300 | |
| 301 | end: |
| 302 | return ret; |
| 303 | } |
| 304 | |
| 305 | static int specialize_context_lookup_name(struct bytecode_runtime *bytecode, |
| 306 | struct load_op *insn) |
| 307 | { |
| 308 | uint16_t offset; |
| 309 | const char *name; |
| 310 | |
| 311 | offset = ((struct get_symbol *) insn->data)->offset; |
| 312 | name = bytecode->p.bc->bc.data + bytecode->p.bc->bc.reloc_offset + offset; |
| 313 | return lttng_get_context_index(lttng_static_ctx, name); |
| 314 | } |
| 315 | |
| 316 | static int specialize_load_object(const struct lttng_event_field *field, |
| 317 | struct vstack_load *load, bool is_context) |
| 318 | { |
| 319 | load->type = LOAD_OBJECT; |
| 320 | /* |
| 321 | * LTTng-UST layout all integer fields as s64 on the stack for the filter. |
| 322 | */ |
| 323 | switch (field->type.atype) { |
| 324 | case atype_integer: |
| 325 | if (field->type.u.basic.integer.signedness) |
| 326 | load->object_type = OBJECT_TYPE_S64; |
| 327 | else |
| 328 | load->object_type = OBJECT_TYPE_U64; |
| 329 | load->rev_bo = false; |
| 330 | break; |
| 331 | case atype_enum: |
| 332 | { |
| 333 | const struct lttng_integer_type *itype = |
| 334 | &field->type.u.basic.enumeration.container_type; |
| 335 | |
| 336 | if (itype->signedness) |
| 337 | load->object_type = OBJECT_TYPE_S64; |
| 338 | else |
| 339 | load->object_type = OBJECT_TYPE_U64; |
| 340 | load->rev_bo = false; |
| 341 | break; |
| 342 | } |
| 343 | case atype_array: |
| 344 | if (field->type.u.array.elem_type.atype != atype_integer) { |
| 345 | printk(KERN_WARNING "Array nesting only supports integer types.\n"); |
| 346 | return -EINVAL; |
| 347 | } |
| 348 | if (is_context) { |
| 349 | load->object_type = OBJECT_TYPE_STRING; |
| 350 | } else { |
| 351 | if (field->type.u.array.elem_type.u.basic.integer.encoding == lttng_encode_none) { |
| 352 | load->object_type = OBJECT_TYPE_ARRAY; |
| 353 | load->field = field; |
| 354 | } else { |
| 355 | load->object_type = OBJECT_TYPE_STRING_SEQUENCE; |
| 356 | } |
| 357 | } |
| 358 | break; |
| 359 | case atype_sequence: |
| 360 | if (field->type.u.sequence.elem_type.atype != atype_integer) { |
| 361 | printk(KERN_WARNING "Sequence nesting only supports integer types.\n"); |
| 362 | return -EINVAL; |
| 363 | } |
| 364 | if (is_context) { |
| 365 | load->object_type = OBJECT_TYPE_STRING; |
| 366 | } else { |
| 367 | if (field->type.u.sequence.elem_type.u.basic.integer.encoding == lttng_encode_none) { |
| 368 | load->object_type = OBJECT_TYPE_SEQUENCE; |
| 369 | load->field = field; |
| 370 | } else { |
| 371 | load->object_type = OBJECT_TYPE_STRING_SEQUENCE; |
| 372 | } |
| 373 | } |
| 374 | break; |
| 375 | case atype_array_bitfield: |
| 376 | printk(KERN_WARNING "Bitfield array type is not supported.\n"); |
| 377 | return -EINVAL; |
| 378 | case atype_sequence_bitfield: |
| 379 | printk(KERN_WARNING "Bitfield sequence type is not supported.\n"); |
| 380 | return -EINVAL; |
| 381 | case atype_string: |
| 382 | load->object_type = OBJECT_TYPE_STRING; |
| 383 | break; |
| 384 | case atype_struct: |
| 385 | printk(KERN_WARNING "Structure type cannot be loaded.\n"); |
| 386 | return -EINVAL; |
| 387 | default: |
| 388 | printk(KERN_WARNING "Unknown type: %d", (int) field->type.atype); |
| 389 | return -EINVAL; |
| 390 | } |
| 391 | return 0; |
| 392 | } |
| 393 | |
| 394 | static int specialize_context_lookup(struct bytecode_runtime *runtime, |
| 395 | struct load_op *insn, |
| 396 | struct vstack_load *load) |
| 397 | { |
| 398 | int idx, ret; |
| 399 | struct lttng_ctx_field *ctx_field; |
| 400 | struct lttng_event_field *field; |
| 401 | struct filter_get_index_data gid; |
| 402 | ssize_t data_offset; |
| 403 | |
| 404 | idx = specialize_context_lookup_name(runtime, insn); |
| 405 | if (idx < 0) { |
| 406 | return -ENOENT; |
| 407 | } |
| 408 | ctx_field = <tng_static_ctx->fields[idx]; |
| 409 | field = &ctx_field->event_field; |
| 410 | ret = specialize_load_object(field, load, true); |
| 411 | if (ret) |
| 412 | return ret; |
| 413 | /* Specialize each get_symbol into a get_index. */ |
| 414 | insn->op = FILTER_OP_GET_INDEX_U16; |
| 415 | memset(&gid, 0, sizeof(gid)); |
| 416 | gid.ctx_index = idx; |
| 417 | gid.elem.type = load->object_type; |
| 418 | data_offset = bytecode_push_data(runtime, &gid, |
| 419 | __alignof__(gid), sizeof(gid)); |
| 420 | if (data_offset < 0) { |
| 421 | return -EINVAL; |
| 422 | } |
| 423 | ((struct get_index_u16 *) insn->data)->index = data_offset; |
| 424 | return 0; |
| 425 | } |
| 426 | |
| 427 | static int specialize_event_payload_lookup(struct lttng_event *event, |
| 428 | struct bytecode_runtime *runtime, |
| 429 | struct load_op *insn, |
| 430 | struct vstack_load *load) |
| 431 | { |
| 432 | const char *name; |
| 433 | uint16_t offset; |
| 434 | const struct lttng_event_desc *desc = event->desc; |
| 435 | unsigned int i, nr_fields; |
| 436 | bool found = false; |
| 437 | uint32_t field_offset = 0; |
| 438 | const struct lttng_event_field *field; |
| 439 | int ret; |
| 440 | struct filter_get_index_data gid; |
| 441 | ssize_t data_offset; |
| 442 | |
| 443 | nr_fields = desc->nr_fields; |
| 444 | offset = ((struct get_symbol *) insn->data)->offset; |
| 445 | name = runtime->p.bc->bc.data + runtime->p.bc->bc.reloc_offset + offset; |
| 446 | for (i = 0; i < nr_fields; i++) { |
| 447 | field = &desc->fields[i]; |
| 448 | if (!strcmp(field->name, name)) { |
| 449 | found = true; |
| 450 | break; |
| 451 | } |
| 452 | /* compute field offset on stack */ |
| 453 | switch (field->type.atype) { |
| 454 | case atype_integer: |
| 455 | case atype_enum: |
| 456 | field_offset += sizeof(int64_t); |
| 457 | break; |
| 458 | case atype_array: |
| 459 | case atype_sequence: |
| 460 | case atype_array_bitfield: |
| 461 | case atype_sequence_bitfield: |
| 462 | field_offset += sizeof(unsigned long); |
| 463 | field_offset += sizeof(void *); |
| 464 | break; |
| 465 | case atype_string: |
| 466 | field_offset += sizeof(void *); |
| 467 | break; |
| 468 | default: |
| 469 | ret = -EINVAL; |
| 470 | goto end; |
| 471 | } |
| 472 | } |
| 473 | if (!found) { |
| 474 | ret = -EINVAL; |
| 475 | goto end; |
| 476 | } |
| 477 | |
| 478 | ret = specialize_load_object(field, load, false); |
| 479 | if (ret) |
| 480 | goto end; |
| 481 | |
| 482 | /* Specialize each get_symbol into a get_index. */ |
| 483 | insn->op = FILTER_OP_GET_INDEX_U16; |
| 484 | memset(&gid, 0, sizeof(gid)); |
| 485 | gid.offset = field_offset; |
| 486 | gid.elem.type = load->object_type; |
| 487 | data_offset = bytecode_push_data(runtime, &gid, |
| 488 | __alignof__(gid), sizeof(gid)); |
| 489 | if (data_offset < 0) { |
| 490 | ret = -EINVAL; |
| 491 | goto end; |
| 492 | } |
| 493 | ((struct get_index_u16 *) insn->data)->index = data_offset; |
| 494 | ret = 0; |
| 495 | end: |
| 496 | return ret; |
| 497 | } |
| 498 | |
| 499 | int lttng_filter_specialize_bytecode(struct lttng_event *event, |
| 500 | struct bytecode_runtime *bytecode) |
| 501 | { |
| 502 | void *pc, *next_pc, *start_pc; |
| 503 | int ret = -EINVAL; |
| 504 | struct vstack _stack; |
| 505 | struct vstack *stack = &_stack; |
| 506 | |
| 507 | vstack_init(stack); |
| 508 | |
| 509 | start_pc = &bytecode->code[0]; |
| 510 | for (pc = next_pc = start_pc; pc - start_pc < bytecode->len; |
| 511 | pc = next_pc) { |
| 512 | switch (*(filter_opcode_t *) pc) { |
| 513 | case FILTER_OP_UNKNOWN: |
| 514 | default: |
| 515 | printk(KERN_WARNING "unknown bytecode op %u\n", |
| 516 | (unsigned int) *(filter_opcode_t *) pc); |
| 517 | ret = -EINVAL; |
| 518 | goto end; |
| 519 | |
| 520 | case FILTER_OP_RETURN: |
| 521 | case FILTER_OP_RETURN_S64: |
| 522 | ret = 0; |
| 523 | goto end; |
| 524 | |
| 525 | /* binary */ |
| 526 | case FILTER_OP_MUL: |
| 527 | case FILTER_OP_DIV: |
| 528 | case FILTER_OP_MOD: |
| 529 | case FILTER_OP_PLUS: |
| 530 | case FILTER_OP_MINUS: |
| 531 | printk(KERN_WARNING "unsupported bytecode op %u\n", |
| 532 | (unsigned int) *(filter_opcode_t *) pc); |
| 533 | ret = -EINVAL; |
| 534 | goto end; |
| 535 | |
| 536 | case FILTER_OP_EQ: |
| 537 | { |
| 538 | struct binary_op *insn = (struct binary_op *) pc; |
| 539 | |
| 540 | switch(vstack_ax(stack)->type) { |
| 541 | default: |
| 542 | printk(KERN_WARNING "unknown register type\n"); |
| 543 | ret = -EINVAL; |
| 544 | goto end; |
| 545 | |
| 546 | case REG_STRING: |
| 547 | if (vstack_bx(stack)->type == REG_STAR_GLOB_STRING) |
| 548 | insn->op = FILTER_OP_EQ_STAR_GLOB_STRING; |
| 549 | else |
| 550 | insn->op = FILTER_OP_EQ_STRING; |
| 551 | break; |
| 552 | case REG_STAR_GLOB_STRING: |
| 553 | insn->op = FILTER_OP_EQ_STAR_GLOB_STRING; |
| 554 | break; |
| 555 | case REG_S64: |
| 556 | if (vstack_bx(stack)->type == REG_S64) |
| 557 | insn->op = FILTER_OP_EQ_S64; |
| 558 | else |
| 559 | insn->op = FILTER_OP_EQ_DOUBLE_S64; |
| 560 | break; |
| 561 | case REG_DOUBLE: |
| 562 | if (vstack_bx(stack)->type == REG_S64) |
| 563 | insn->op = FILTER_OP_EQ_S64_DOUBLE; |
| 564 | else |
| 565 | insn->op = FILTER_OP_EQ_DOUBLE; |
| 566 | break; |
| 567 | } |
| 568 | /* Pop 2, push 1 */ |
| 569 | if (vstack_pop(stack)) { |
| 570 | ret = -EINVAL; |
| 571 | goto end; |
| 572 | } |
| 573 | vstack_ax(stack)->type = REG_S64; |
| 574 | next_pc += sizeof(struct binary_op); |
| 575 | break; |
| 576 | } |
| 577 | |
| 578 | case FILTER_OP_NE: |
| 579 | { |
| 580 | struct binary_op *insn = (struct binary_op *) pc; |
| 581 | |
| 582 | switch(vstack_ax(stack)->type) { |
| 583 | default: |
| 584 | printk(KERN_WARNING "unknown register type\n"); |
| 585 | ret = -EINVAL; |
| 586 | goto end; |
| 587 | |
| 588 | case REG_STRING: |
| 589 | if (vstack_bx(stack)->type == REG_STAR_GLOB_STRING) |
| 590 | insn->op = FILTER_OP_NE_STAR_GLOB_STRING; |
| 591 | else |
| 592 | insn->op = FILTER_OP_NE_STRING; |
| 593 | break; |
| 594 | case REG_STAR_GLOB_STRING: |
| 595 | insn->op = FILTER_OP_NE_STAR_GLOB_STRING; |
| 596 | break; |
| 597 | case REG_S64: |
| 598 | if (vstack_bx(stack)->type == REG_S64) |
| 599 | insn->op = FILTER_OP_NE_S64; |
| 600 | else |
| 601 | insn->op = FILTER_OP_NE_DOUBLE_S64; |
| 602 | break; |
| 603 | case REG_DOUBLE: |
| 604 | if (vstack_bx(stack)->type == REG_S64) |
| 605 | insn->op = FILTER_OP_NE_S64_DOUBLE; |
| 606 | else |
| 607 | insn->op = FILTER_OP_NE_DOUBLE; |
| 608 | break; |
| 609 | } |
| 610 | /* Pop 2, push 1 */ |
| 611 | if (vstack_pop(stack)) { |
| 612 | ret = -EINVAL; |
| 613 | goto end; |
| 614 | } |
| 615 | vstack_ax(stack)->type = REG_S64; |
| 616 | next_pc += sizeof(struct binary_op); |
| 617 | break; |
| 618 | } |
| 619 | |
| 620 | case FILTER_OP_GT: |
| 621 | { |
| 622 | struct binary_op *insn = (struct binary_op *) pc; |
| 623 | |
| 624 | switch(vstack_ax(stack)->type) { |
| 625 | default: |
| 626 | printk(KERN_WARNING "unknown register type\n"); |
| 627 | ret = -EINVAL; |
| 628 | goto end; |
| 629 | |
| 630 | case REG_STAR_GLOB_STRING: |
| 631 | printk(KERN_WARNING "invalid register type for > binary operator\n"); |
| 632 | ret = -EINVAL; |
| 633 | goto end; |
| 634 | case REG_STRING: |
| 635 | insn->op = FILTER_OP_GT_STRING; |
| 636 | break; |
| 637 | case REG_S64: |
| 638 | if (vstack_bx(stack)->type == REG_S64) |
| 639 | insn->op = FILTER_OP_GT_S64; |
| 640 | else |
| 641 | insn->op = FILTER_OP_GT_DOUBLE_S64; |
| 642 | break; |
| 643 | case REG_DOUBLE: |
| 644 | if (vstack_bx(stack)->type == REG_S64) |
| 645 | insn->op = FILTER_OP_GT_S64_DOUBLE; |
| 646 | else |
| 647 | insn->op = FILTER_OP_GT_DOUBLE; |
| 648 | break; |
| 649 | } |
| 650 | /* Pop 2, push 1 */ |
| 651 | if (vstack_pop(stack)) { |
| 652 | ret = -EINVAL; |
| 653 | goto end; |
| 654 | } |
| 655 | vstack_ax(stack)->type = REG_S64; |
| 656 | next_pc += sizeof(struct binary_op); |
| 657 | break; |
| 658 | } |
| 659 | |
| 660 | case FILTER_OP_LT: |
| 661 | { |
| 662 | struct binary_op *insn = (struct binary_op *) pc; |
| 663 | |
| 664 | switch(vstack_ax(stack)->type) { |
| 665 | default: |
| 666 | printk(KERN_WARNING "unknown register type\n"); |
| 667 | ret = -EINVAL; |
| 668 | goto end; |
| 669 | |
| 670 | case REG_STAR_GLOB_STRING: |
| 671 | printk(KERN_WARNING "invalid register type for < binary operator\n"); |
| 672 | ret = -EINVAL; |
| 673 | goto end; |
| 674 | case REG_STRING: |
| 675 | insn->op = FILTER_OP_LT_STRING; |
| 676 | break; |
| 677 | case REG_S64: |
| 678 | if (vstack_bx(stack)->type == REG_S64) |
| 679 | insn->op = FILTER_OP_LT_S64; |
| 680 | else |
| 681 | insn->op = FILTER_OP_LT_DOUBLE_S64; |
| 682 | break; |
| 683 | case REG_DOUBLE: |
| 684 | if (vstack_bx(stack)->type == REG_S64) |
| 685 | insn->op = FILTER_OP_LT_S64_DOUBLE; |
| 686 | else |
| 687 | insn->op = FILTER_OP_LT_DOUBLE; |
| 688 | break; |
| 689 | } |
| 690 | /* Pop 2, push 1 */ |
| 691 | if (vstack_pop(stack)) { |
| 692 | ret = -EINVAL; |
| 693 | goto end; |
| 694 | } |
| 695 | vstack_ax(stack)->type = REG_S64; |
| 696 | next_pc += sizeof(struct binary_op); |
| 697 | break; |
| 698 | } |
| 699 | |
| 700 | case FILTER_OP_GE: |
| 701 | { |
| 702 | struct binary_op *insn = (struct binary_op *) pc; |
| 703 | |
| 704 | switch(vstack_ax(stack)->type) { |
| 705 | default: |
| 706 | printk(KERN_WARNING "unknown register type\n"); |
| 707 | ret = -EINVAL; |
| 708 | goto end; |
| 709 | |
| 710 | case REG_STAR_GLOB_STRING: |
| 711 | printk(KERN_WARNING "invalid register type for >= binary operator\n"); |
| 712 | ret = -EINVAL; |
| 713 | goto end; |
| 714 | case REG_STRING: |
| 715 | insn->op = FILTER_OP_GE_STRING; |
| 716 | break; |
| 717 | case REG_S64: |
| 718 | if (vstack_bx(stack)->type == REG_S64) |
| 719 | insn->op = FILTER_OP_GE_S64; |
| 720 | else |
| 721 | insn->op = FILTER_OP_GE_DOUBLE_S64; |
| 722 | break; |
| 723 | case REG_DOUBLE: |
| 724 | if (vstack_bx(stack)->type == REG_S64) |
| 725 | insn->op = FILTER_OP_GE_S64_DOUBLE; |
| 726 | else |
| 727 | insn->op = FILTER_OP_GE_DOUBLE; |
| 728 | break; |
| 729 | } |
| 730 | /* Pop 2, push 1 */ |
| 731 | if (vstack_pop(stack)) { |
| 732 | ret = -EINVAL; |
| 733 | goto end; |
| 734 | } |
| 735 | vstack_ax(stack)->type = REG_S64; |
| 736 | next_pc += sizeof(struct binary_op); |
| 737 | break; |
| 738 | } |
| 739 | case FILTER_OP_LE: |
| 740 | { |
| 741 | struct binary_op *insn = (struct binary_op *) pc; |
| 742 | |
| 743 | switch(vstack_ax(stack)->type) { |
| 744 | default: |
| 745 | printk(KERN_WARNING "unknown register type\n"); |
| 746 | ret = -EINVAL; |
| 747 | goto end; |
| 748 | |
| 749 | case REG_STAR_GLOB_STRING: |
| 750 | printk(KERN_WARNING "invalid register type for <= binary operator\n"); |
| 751 | ret = -EINVAL; |
| 752 | goto end; |
| 753 | case REG_STRING: |
| 754 | insn->op = FILTER_OP_LE_STRING; |
| 755 | break; |
| 756 | case REG_S64: |
| 757 | if (vstack_bx(stack)->type == REG_S64) |
| 758 | insn->op = FILTER_OP_LE_S64; |
| 759 | else |
| 760 | insn->op = FILTER_OP_LE_DOUBLE_S64; |
| 761 | break; |
| 762 | case REG_DOUBLE: |
| 763 | if (vstack_bx(stack)->type == REG_S64) |
| 764 | insn->op = FILTER_OP_LE_S64_DOUBLE; |
| 765 | else |
| 766 | insn->op = FILTER_OP_LE_DOUBLE; |
| 767 | break; |
| 768 | } |
| 769 | vstack_ax(stack)->type = REG_S64; |
| 770 | next_pc += sizeof(struct binary_op); |
| 771 | break; |
| 772 | } |
| 773 | |
| 774 | case FILTER_OP_EQ_STRING: |
| 775 | case FILTER_OP_NE_STRING: |
| 776 | case FILTER_OP_GT_STRING: |
| 777 | case FILTER_OP_LT_STRING: |
| 778 | case FILTER_OP_GE_STRING: |
| 779 | case FILTER_OP_LE_STRING: |
| 780 | case FILTER_OP_EQ_STAR_GLOB_STRING: |
| 781 | case FILTER_OP_NE_STAR_GLOB_STRING: |
| 782 | case FILTER_OP_EQ_S64: |
| 783 | case FILTER_OP_NE_S64: |
| 784 | case FILTER_OP_GT_S64: |
| 785 | case FILTER_OP_LT_S64: |
| 786 | case FILTER_OP_GE_S64: |
| 787 | case FILTER_OP_LE_S64: |
| 788 | case FILTER_OP_EQ_DOUBLE: |
| 789 | case FILTER_OP_NE_DOUBLE: |
| 790 | case FILTER_OP_GT_DOUBLE: |
| 791 | case FILTER_OP_LT_DOUBLE: |
| 792 | case FILTER_OP_GE_DOUBLE: |
| 793 | case FILTER_OP_LE_DOUBLE: |
| 794 | case FILTER_OP_EQ_DOUBLE_S64: |
| 795 | case FILTER_OP_NE_DOUBLE_S64: |
| 796 | case FILTER_OP_GT_DOUBLE_S64: |
| 797 | case FILTER_OP_LT_DOUBLE_S64: |
| 798 | case FILTER_OP_GE_DOUBLE_S64: |
| 799 | case FILTER_OP_LE_DOUBLE_S64: |
| 800 | case FILTER_OP_EQ_S64_DOUBLE: |
| 801 | case FILTER_OP_NE_S64_DOUBLE: |
| 802 | case FILTER_OP_GT_S64_DOUBLE: |
| 803 | case FILTER_OP_LT_S64_DOUBLE: |
| 804 | case FILTER_OP_GE_S64_DOUBLE: |
| 805 | case FILTER_OP_LE_S64_DOUBLE: |
| 806 | case FILTER_OP_BIT_RSHIFT: |
| 807 | case FILTER_OP_BIT_LSHIFT: |
| 808 | case FILTER_OP_BIT_AND: |
| 809 | case FILTER_OP_BIT_OR: |
| 810 | case FILTER_OP_BIT_XOR: |
| 811 | { |
| 812 | /* Pop 2, push 1 */ |
| 813 | if (vstack_pop(stack)) { |
| 814 | ret = -EINVAL; |
| 815 | goto end; |
| 816 | } |
| 817 | vstack_ax(stack)->type = REG_S64; |
| 818 | next_pc += sizeof(struct binary_op); |
| 819 | break; |
| 820 | } |
| 821 | |
| 822 | /* unary */ |
| 823 | case FILTER_OP_UNARY_PLUS: |
| 824 | { |
| 825 | struct unary_op *insn = (struct unary_op *) pc; |
| 826 | |
| 827 | switch(vstack_ax(stack)->type) { |
| 828 | default: |
| 829 | printk(KERN_WARNING "unknown register type\n"); |
| 830 | ret = -EINVAL; |
| 831 | goto end; |
| 832 | |
| 833 | case REG_S64: |
| 834 | insn->op = FILTER_OP_UNARY_PLUS_S64; |
| 835 | break; |
| 836 | case REG_DOUBLE: |
| 837 | insn->op = FILTER_OP_UNARY_PLUS_DOUBLE; |
| 838 | break; |
| 839 | } |
| 840 | /* Pop 1, push 1 */ |
| 841 | next_pc += sizeof(struct unary_op); |
| 842 | break; |
| 843 | } |
| 844 | |
| 845 | case FILTER_OP_UNARY_MINUS: |
| 846 | { |
| 847 | struct unary_op *insn = (struct unary_op *) pc; |
| 848 | |
| 849 | switch(vstack_ax(stack)->type) { |
| 850 | default: |
| 851 | printk(KERN_WARNING "unknown register type\n"); |
| 852 | ret = -EINVAL; |
| 853 | goto end; |
| 854 | |
| 855 | case REG_S64: |
| 856 | insn->op = FILTER_OP_UNARY_MINUS_S64; |
| 857 | break; |
| 858 | case REG_DOUBLE: |
| 859 | insn->op = FILTER_OP_UNARY_MINUS_DOUBLE; |
| 860 | break; |
| 861 | } |
| 862 | /* Pop 1, push 1 */ |
| 863 | next_pc += sizeof(struct unary_op); |
| 864 | break; |
| 865 | } |
| 866 | |
| 867 | case FILTER_OP_UNARY_NOT: |
| 868 | { |
| 869 | struct unary_op *insn = (struct unary_op *) pc; |
| 870 | |
| 871 | switch(vstack_ax(stack)->type) { |
| 872 | default: |
| 873 | printk(KERN_WARNING "unknown register type\n"); |
| 874 | ret = -EINVAL; |
| 875 | goto end; |
| 876 | |
| 877 | case REG_S64: |
| 878 | insn->op = FILTER_OP_UNARY_NOT_S64; |
| 879 | break; |
| 880 | case REG_DOUBLE: |
| 881 | insn->op = FILTER_OP_UNARY_NOT_DOUBLE; |
| 882 | break; |
| 883 | } |
| 884 | /* Pop 1, push 1 */ |
| 885 | next_pc += sizeof(struct unary_op); |
| 886 | break; |
| 887 | } |
| 888 | |
| 889 | case FILTER_OP_UNARY_BIT_NOT: |
| 890 | { |
| 891 | /* Pop 1, push 1 */ |
| 892 | next_pc += sizeof(struct unary_op); |
| 893 | break; |
| 894 | } |
| 895 | |
| 896 | case FILTER_OP_UNARY_PLUS_S64: |
| 897 | case FILTER_OP_UNARY_MINUS_S64: |
| 898 | case FILTER_OP_UNARY_NOT_S64: |
| 899 | case FILTER_OP_UNARY_PLUS_DOUBLE: |
| 900 | case FILTER_OP_UNARY_MINUS_DOUBLE: |
| 901 | case FILTER_OP_UNARY_NOT_DOUBLE: |
| 902 | { |
| 903 | /* Pop 1, push 1 */ |
| 904 | next_pc += sizeof(struct unary_op); |
| 905 | break; |
| 906 | } |
| 907 | |
| 908 | /* logical */ |
| 909 | case FILTER_OP_AND: |
| 910 | case FILTER_OP_OR: |
| 911 | { |
| 912 | /* Continue to next instruction */ |
| 913 | /* Pop 1 when jump not taken */ |
| 914 | if (vstack_pop(stack)) { |
| 915 | ret = -EINVAL; |
| 916 | goto end; |
| 917 | } |
| 918 | next_pc += sizeof(struct logical_op); |
| 919 | break; |
| 920 | } |
| 921 | |
| 922 | /* load field ref */ |
| 923 | case FILTER_OP_LOAD_FIELD_REF: |
| 924 | { |
| 925 | printk(KERN_WARNING "Unknown field ref type\n"); |
| 926 | ret = -EINVAL; |
| 927 | goto end; |
| 928 | } |
| 929 | /* get context ref */ |
| 930 | case FILTER_OP_GET_CONTEXT_REF: |
| 931 | { |
| 932 | printk(KERN_WARNING "Unknown get context ref type\n"); |
| 933 | ret = -EINVAL; |
| 934 | goto end; |
| 935 | } |
| 936 | case FILTER_OP_LOAD_FIELD_REF_STRING: |
| 937 | case FILTER_OP_LOAD_FIELD_REF_SEQUENCE: |
| 938 | case FILTER_OP_GET_CONTEXT_REF_STRING: |
| 939 | case FILTER_OP_LOAD_FIELD_REF_USER_STRING: |
| 940 | case FILTER_OP_LOAD_FIELD_REF_USER_SEQUENCE: |
| 941 | { |
| 942 | if (vstack_push(stack)) { |
| 943 | ret = -EINVAL; |
| 944 | goto end; |
| 945 | } |
| 946 | vstack_ax(stack)->type = REG_STRING; |
| 947 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); |
| 948 | break; |
| 949 | } |
| 950 | case FILTER_OP_LOAD_FIELD_REF_S64: |
| 951 | case FILTER_OP_GET_CONTEXT_REF_S64: |
| 952 | { |
| 953 | if (vstack_push(stack)) { |
| 954 | ret = -EINVAL; |
| 955 | goto end; |
| 956 | } |
| 957 | vstack_ax(stack)->type = REG_S64; |
| 958 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); |
| 959 | break; |
| 960 | } |
| 961 | case FILTER_OP_LOAD_FIELD_REF_DOUBLE: |
| 962 | case FILTER_OP_GET_CONTEXT_REF_DOUBLE: |
| 963 | { |
| 964 | if (vstack_push(stack)) { |
| 965 | ret = -EINVAL; |
| 966 | goto end; |
| 967 | } |
| 968 | vstack_ax(stack)->type = REG_DOUBLE; |
| 969 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); |
| 970 | break; |
| 971 | } |
| 972 | |
| 973 | /* load from immediate operand */ |
| 974 | case FILTER_OP_LOAD_STRING: |
| 975 | { |
| 976 | struct load_op *insn = (struct load_op *) pc; |
| 977 | |
| 978 | if (vstack_push(stack)) { |
| 979 | ret = -EINVAL; |
| 980 | goto end; |
| 981 | } |
| 982 | vstack_ax(stack)->type = REG_STRING; |
| 983 | next_pc += sizeof(struct load_op) + strlen(insn->data) + 1; |
| 984 | break; |
| 985 | } |
| 986 | |
| 987 | case FILTER_OP_LOAD_STAR_GLOB_STRING: |
| 988 | { |
| 989 | struct load_op *insn = (struct load_op *) pc; |
| 990 | |
| 991 | if (vstack_push(stack)) { |
| 992 | ret = -EINVAL; |
| 993 | goto end; |
| 994 | } |
| 995 | vstack_ax(stack)->type = REG_STAR_GLOB_STRING; |
| 996 | next_pc += sizeof(struct load_op) + strlen(insn->data) + 1; |
| 997 | break; |
| 998 | } |
| 999 | |
| 1000 | case FILTER_OP_LOAD_S64: |
| 1001 | { |
| 1002 | if (vstack_push(stack)) { |
| 1003 | ret = -EINVAL; |
| 1004 | goto end; |
| 1005 | } |
| 1006 | vstack_ax(stack)->type = REG_S64; |
| 1007 | next_pc += sizeof(struct load_op) |
| 1008 | + sizeof(struct literal_numeric); |
| 1009 | break; |
| 1010 | } |
| 1011 | |
| 1012 | case FILTER_OP_LOAD_DOUBLE: |
| 1013 | { |
| 1014 | if (vstack_push(stack)) { |
| 1015 | ret = -EINVAL; |
| 1016 | goto end; |
| 1017 | } |
| 1018 | vstack_ax(stack)->type = REG_DOUBLE; |
| 1019 | next_pc += sizeof(struct load_op) |
| 1020 | + sizeof(struct literal_double); |
| 1021 | break; |
| 1022 | } |
| 1023 | |
| 1024 | /* cast */ |
| 1025 | case FILTER_OP_CAST_TO_S64: |
| 1026 | { |
| 1027 | struct cast_op *insn = (struct cast_op *) pc; |
| 1028 | |
| 1029 | switch (vstack_ax(stack)->type) { |
| 1030 | default: |
| 1031 | printk(KERN_WARNING "unknown register type\n"); |
| 1032 | ret = -EINVAL; |
| 1033 | goto end; |
| 1034 | |
| 1035 | case REG_STRING: |
| 1036 | case REG_STAR_GLOB_STRING: |
| 1037 | printk(KERN_WARNING "Cast op can only be applied to numeric or floating point registers\n"); |
| 1038 | ret = -EINVAL; |
| 1039 | goto end; |
| 1040 | case REG_S64: |
| 1041 | insn->op = FILTER_OP_CAST_NOP; |
| 1042 | break; |
| 1043 | case REG_DOUBLE: |
| 1044 | insn->op = FILTER_OP_CAST_DOUBLE_TO_S64; |
| 1045 | break; |
| 1046 | } |
| 1047 | /* Pop 1, push 1 */ |
| 1048 | vstack_ax(stack)->type = REG_S64; |
| 1049 | next_pc += sizeof(struct cast_op); |
| 1050 | break; |
| 1051 | } |
| 1052 | case FILTER_OP_CAST_DOUBLE_TO_S64: |
| 1053 | { |
| 1054 | /* Pop 1, push 1 */ |
| 1055 | vstack_ax(stack)->type = REG_S64; |
| 1056 | next_pc += sizeof(struct cast_op); |
| 1057 | break; |
| 1058 | } |
| 1059 | case FILTER_OP_CAST_NOP: |
| 1060 | { |
| 1061 | next_pc += sizeof(struct cast_op); |
| 1062 | break; |
| 1063 | } |
| 1064 | |
| 1065 | /* |
| 1066 | * Instructions for recursive traversal through composed types. |
| 1067 | */ |
| 1068 | case FILTER_OP_GET_CONTEXT_ROOT: |
| 1069 | { |
| 1070 | if (vstack_push(stack)) { |
| 1071 | ret = -EINVAL; |
| 1072 | goto end; |
| 1073 | } |
| 1074 | vstack_ax(stack)->type = REG_PTR; |
| 1075 | vstack_ax(stack)->load.type = LOAD_ROOT_CONTEXT; |
| 1076 | next_pc += sizeof(struct load_op); |
| 1077 | break; |
| 1078 | } |
| 1079 | case FILTER_OP_GET_APP_CONTEXT_ROOT: |
| 1080 | { |
| 1081 | if (vstack_push(stack)) { |
| 1082 | ret = -EINVAL; |
| 1083 | goto end; |
| 1084 | } |
| 1085 | vstack_ax(stack)->type = REG_PTR; |
| 1086 | vstack_ax(stack)->load.type = LOAD_ROOT_APP_CONTEXT; |
| 1087 | next_pc += sizeof(struct load_op); |
| 1088 | break; |
| 1089 | } |
| 1090 | case FILTER_OP_GET_PAYLOAD_ROOT: |
| 1091 | { |
| 1092 | if (vstack_push(stack)) { |
| 1093 | ret = -EINVAL; |
| 1094 | goto end; |
| 1095 | } |
| 1096 | vstack_ax(stack)->type = REG_PTR; |
| 1097 | vstack_ax(stack)->load.type = LOAD_ROOT_PAYLOAD; |
| 1098 | next_pc += sizeof(struct load_op); |
| 1099 | break; |
| 1100 | } |
| 1101 | |
| 1102 | case FILTER_OP_LOAD_FIELD: |
| 1103 | { |
| 1104 | struct load_op *insn = (struct load_op *) pc; |
| 1105 | |
| 1106 | WARN_ON_ONCE(vstack_ax(stack)->type != REG_PTR); |
| 1107 | /* Pop 1, push 1 */ |
| 1108 | ret = specialize_load_field(vstack_ax(stack), insn); |
| 1109 | if (ret) |
| 1110 | goto end; |
| 1111 | |
| 1112 | next_pc += sizeof(struct load_op); |
| 1113 | break; |
| 1114 | } |
| 1115 | |
| 1116 | case FILTER_OP_LOAD_FIELD_S8: |
| 1117 | case FILTER_OP_LOAD_FIELD_S16: |
| 1118 | case FILTER_OP_LOAD_FIELD_S32: |
| 1119 | case FILTER_OP_LOAD_FIELD_S64: |
| 1120 | case FILTER_OP_LOAD_FIELD_U8: |
| 1121 | case FILTER_OP_LOAD_FIELD_U16: |
| 1122 | case FILTER_OP_LOAD_FIELD_U32: |
| 1123 | case FILTER_OP_LOAD_FIELD_U64: |
| 1124 | { |
| 1125 | /* Pop 1, push 1 */ |
| 1126 | vstack_ax(stack)->type = REG_S64; |
| 1127 | next_pc += sizeof(struct load_op); |
| 1128 | break; |
| 1129 | } |
| 1130 | |
| 1131 | case FILTER_OP_LOAD_FIELD_STRING: |
| 1132 | case FILTER_OP_LOAD_FIELD_SEQUENCE: |
| 1133 | { |
| 1134 | /* Pop 1, push 1 */ |
| 1135 | vstack_ax(stack)->type = REG_STRING; |
| 1136 | next_pc += sizeof(struct load_op); |
| 1137 | break; |
| 1138 | } |
| 1139 | |
| 1140 | case FILTER_OP_LOAD_FIELD_DOUBLE: |
| 1141 | { |
| 1142 | /* Pop 1, push 1 */ |
| 1143 | vstack_ax(stack)->type = REG_DOUBLE; |
| 1144 | next_pc += sizeof(struct load_op); |
| 1145 | break; |
| 1146 | } |
| 1147 | |
| 1148 | case FILTER_OP_GET_SYMBOL: |
| 1149 | { |
| 1150 | struct load_op *insn = (struct load_op *) pc; |
| 1151 | |
| 1152 | dbg_printk("op get symbol\n"); |
| 1153 | switch (vstack_ax(stack)->load.type) { |
| 1154 | case LOAD_OBJECT: |
| 1155 | printk(KERN_WARNING "Nested fields not implemented yet.\n"); |
| 1156 | ret = -EINVAL; |
| 1157 | goto end; |
| 1158 | case LOAD_ROOT_CONTEXT: |
| 1159 | /* Lookup context field. */ |
| 1160 | ret = specialize_context_lookup(bytecode, insn, |
| 1161 | &vstack_ax(stack)->load); |
| 1162 | if (ret) |
| 1163 | goto end; |
| 1164 | break; |
| 1165 | case LOAD_ROOT_APP_CONTEXT: |
| 1166 | ret = -EINVAL; |
| 1167 | goto end; |
| 1168 | case LOAD_ROOT_PAYLOAD: |
| 1169 | /* Lookup event payload field. */ |
| 1170 | ret = specialize_event_payload_lookup(event, |
| 1171 | bytecode, insn, |
| 1172 | &vstack_ax(stack)->load); |
| 1173 | if (ret) |
| 1174 | goto end; |
| 1175 | break; |
| 1176 | } |
| 1177 | next_pc += sizeof(struct load_op) + sizeof(struct get_symbol); |
| 1178 | break; |
| 1179 | } |
| 1180 | |
| 1181 | case FILTER_OP_GET_SYMBOL_FIELD: |
| 1182 | { |
| 1183 | /* Always generated by specialize phase. */ |
| 1184 | ret = -EINVAL; |
| 1185 | goto end; |
| 1186 | } |
| 1187 | |
| 1188 | case FILTER_OP_GET_INDEX_U16: |
| 1189 | { |
| 1190 | struct load_op *insn = (struct load_op *) pc; |
| 1191 | struct get_index_u16 *index = (struct get_index_u16 *) insn->data; |
| 1192 | |
| 1193 | dbg_printk("op get index u16\n"); |
| 1194 | /* Pop 1, push 1 */ |
| 1195 | ret = specialize_get_index(bytecode, insn, index->index, |
| 1196 | vstack_ax(stack), sizeof(*index)); |
| 1197 | if (ret) |
| 1198 | goto end; |
| 1199 | next_pc += sizeof(struct load_op) + sizeof(struct get_index_u16); |
| 1200 | break; |
| 1201 | } |
| 1202 | |
| 1203 | case FILTER_OP_GET_INDEX_U64: |
| 1204 | { |
| 1205 | struct load_op *insn = (struct load_op *) pc; |
| 1206 | struct get_index_u64 *index = (struct get_index_u64 *) insn->data; |
| 1207 | |
| 1208 | dbg_printk("op get index u64\n"); |
| 1209 | /* Pop 1, push 1 */ |
| 1210 | ret = specialize_get_index(bytecode, insn, index->index, |
| 1211 | vstack_ax(stack), sizeof(*index)); |
| 1212 | if (ret) |
| 1213 | goto end; |
| 1214 | next_pc += sizeof(struct load_op) + sizeof(struct get_index_u64); |
| 1215 | break; |
| 1216 | } |
| 1217 | |
| 1218 | } |
| 1219 | } |
| 1220 | end: |
| 1221 | return ret; |
| 1222 | } |