1 /****************************************************************************** 2 * 3 * Module Name: psargs - Parse AML opcode arguments 4 * 5 *****************************************************************************/ 6 7 /* 8 * Copyright (C) 2000 - 2017, Intel Corp. 9 * All rights reserved. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions, and the following disclaimer, 16 * without modification. 17 * 2. Redistributions in binary form must reproduce at minimum a disclaimer 18 * substantially similar to the "NO WARRANTY" disclaimer below 19 * ("Disclaimer") and any redistribution must be conditioned upon 20 * including a substantially similar Disclaimer requirement for further 21 * binary redistribution. 22 * 3. Neither the names of the above-listed copyright holders nor the names 23 * of any contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * Alternatively, this software may be distributed under the terms of the 27 * GNU General Public License ("GPL") version 2 as published by the Free 28 * Software Foundation. 29 * 30 * NO WARRANTY 31 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 32 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 33 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR 34 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 35 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 36 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 37 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 38 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 39 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 40 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 41 * POSSIBILITY OF SUCH DAMAGES. 42 */ 43 44 #include <acpi/acpi.h> 45 #include "accommon.h" 46 #include "acparser.h" 47 #include "amlcode.h" 48 #include "acnamesp.h" 49 #include "acdispat.h" 50 51 #define _COMPONENT ACPI_PARSER 52 ACPI_MODULE_NAME("psargs") 53 54 /* Local prototypes */ 55 static u32 56 acpi_ps_get_next_package_length(struct acpi_parse_state *parser_state); 57 58 static union acpi_parse_object *acpi_ps_get_next_field(struct acpi_parse_state 59 *parser_state); 60 61 /******************************************************************************* 62 * 63 * FUNCTION: acpi_ps_get_next_package_length 64 * 65 * PARAMETERS: parser_state - Current parser state object 66 * 67 * RETURN: Decoded package length. On completion, the AML pointer points 68 * past the length byte or bytes. 69 * 70 * DESCRIPTION: Decode and return a package length field. 71 * Note: Largest package length is 28 bits, from ACPI specification 72 * 73 ******************************************************************************/ 74 75 static u32 76 acpi_ps_get_next_package_length(struct acpi_parse_state *parser_state) 77 { 78 u8 *aml = parser_state->aml; 79 u32 package_length = 0; 80 u32 byte_count; 81 u8 byte_zero_mask = 0x3F; /* Default [0:5] */ 82 83 ACPI_FUNCTION_TRACE(ps_get_next_package_length); 84 85 /* 86 * Byte 0 bits [6:7] contain the number of additional bytes 87 * used to encode the package length, either 0,1,2, or 3 88 */ 89 byte_count = (aml[0] >> 6); 90 parser_state->aml += ((acpi_size)byte_count + 1); 91 92 /* Get bytes 3, 2, 1 as needed */ 93 94 while (byte_count) { 95 /* 96 * Final bit positions for the package length bytes: 97 * Byte3->[20:27] 98 * Byte2->[12:19] 99 * Byte1->[04:11] 100 * Byte0->[00:03] 101 */ 102 package_length |= (aml[byte_count] << ((byte_count << 3) - 4)); 103 104 byte_zero_mask = 0x0F; /* Use bits [0:3] of byte 0 */ 105 byte_count--; 106 } 107 108 /* Byte 0 is a special case, either bits [0:3] or [0:5] are used */ 109 110 package_length |= (aml[0] & byte_zero_mask); 111 return_UINT32(package_length); 112 } 113 114 /******************************************************************************* 115 * 116 * FUNCTION: acpi_ps_get_next_package_end 117 * 118 * PARAMETERS: parser_state - Current parser state object 119 * 120 * RETURN: Pointer to end-of-package +1 121 * 122 * DESCRIPTION: Get next package length and return a pointer past the end of 123 * the package. Consumes the package length field 124 * 125 ******************************************************************************/ 126 127 u8 *acpi_ps_get_next_package_end(struct acpi_parse_state *parser_state) 128 { 129 u8 *start = parser_state->aml; 130 u32 package_length; 131 132 ACPI_FUNCTION_TRACE(ps_get_next_package_end); 133 134 /* Function below updates parser_state->Aml */ 135 136 package_length = acpi_ps_get_next_package_length(parser_state); 137 138 return_PTR(start + package_length); /* end of package */ 139 } 140 141 /******************************************************************************* 142 * 143 * FUNCTION: acpi_ps_get_next_namestring 144 * 145 * PARAMETERS: parser_state - Current parser state object 146 * 147 * RETURN: Pointer to the start of the name string (pointer points into 148 * the AML. 149 * 150 * DESCRIPTION: Get next raw namestring within the AML stream. Handles all name 151 * prefix characters. Set parser state to point past the string. 152 * (Name is consumed from the AML.) 153 * 154 ******************************************************************************/ 155 156 char *acpi_ps_get_next_namestring(struct acpi_parse_state *parser_state) 157 { 158 u8 *start = parser_state->aml; 159 u8 *end = parser_state->aml; 160 161 ACPI_FUNCTION_TRACE(ps_get_next_namestring); 162 163 /* Point past any namestring prefix characters (backslash or carat) */ 164 165 while (ACPI_IS_ROOT_PREFIX(*end) || ACPI_IS_PARENT_PREFIX(*end)) { 166 end++; 167 } 168 169 /* Decode the path prefix character */ 170 171 switch (*end) { 172 case 0: 173 174 /* null_name */ 175 176 if (end == start) { 177 start = NULL; 178 } 179 end++; 180 break; 181 182 case AML_DUAL_NAME_PREFIX: 183 184 /* Two name segments */ 185 186 end += 1 + (2 * ACPI_NAME_SIZE); 187 break; 188 189 case AML_MULTI_NAME_PREFIX_OP: 190 191 /* Multiple name segments, 4 chars each, count in next byte */ 192 193 end += 2 + (*(end + 1) * ACPI_NAME_SIZE); 194 break; 195 196 default: 197 198 /* Single name segment */ 199 200 end += ACPI_NAME_SIZE; 201 break; 202 } 203 204 parser_state->aml = end; 205 return_PTR((char *)start); 206 } 207 208 /******************************************************************************* 209 * 210 * FUNCTION: acpi_ps_get_next_namepath 211 * 212 * PARAMETERS: parser_state - Current parser state object 213 * arg - Where the namepath will be stored 214 * arg_count - If the namepath points to a control method 215 * the method's argument is returned here. 216 * possible_method_call - Whether the namepath can possibly be the 217 * start of a method call 218 * 219 * RETURN: Status 220 * 221 * DESCRIPTION: Get next name (if method call, return # of required args). 222 * Names are looked up in the internal namespace to determine 223 * if the name represents a control method. If a method 224 * is found, the number of arguments to the method is returned. 225 * This information is critical for parsing to continue correctly. 226 * 227 ******************************************************************************/ 228 229 acpi_status 230 acpi_ps_get_next_namepath(struct acpi_walk_state *walk_state, 231 struct acpi_parse_state *parser_state, 232 union acpi_parse_object *arg, u8 possible_method_call) 233 { 234 acpi_status status; 235 char *path; 236 union acpi_parse_object *name_op; 237 union acpi_operand_object *method_desc; 238 struct acpi_namespace_node *node; 239 u8 *start = parser_state->aml; 240 241 ACPI_FUNCTION_TRACE(ps_get_next_namepath); 242 243 path = acpi_ps_get_next_namestring(parser_state); 244 acpi_ps_init_op(arg, AML_INT_NAMEPATH_OP); 245 246 /* Null path case is allowed, just exit */ 247 248 if (!path) { 249 arg->common.value.name = path; 250 return_ACPI_STATUS(AE_OK); 251 } 252 253 /* 254 * Lookup the name in the internal namespace, starting with the current 255 * scope. We don't want to add anything new to the namespace here, 256 * however, so we use MODE_EXECUTE. 257 * Allow searching of the parent tree, but don't open a new scope - 258 * we just want to lookup the object (must be mode EXECUTE to perform 259 * the upsearch) 260 */ 261 status = acpi_ns_lookup(walk_state->scope_info, path, 262 ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE, 263 ACPI_NS_SEARCH_PARENT | ACPI_NS_DONT_OPEN_SCOPE, 264 NULL, &node); 265 266 /* 267 * If this name is a control method invocation, we must 268 * setup the method call 269 */ 270 if (ACPI_SUCCESS(status) && 271 possible_method_call && (node->type == ACPI_TYPE_METHOD)) { 272 if ((GET_CURRENT_ARG_TYPE(walk_state->arg_types) == 273 ARGP_SUPERNAME) 274 || (GET_CURRENT_ARG_TYPE(walk_state->arg_types) == 275 ARGP_TARGET)) { 276 /* 277 * acpi_ps_get_next_namestring has increased the AML pointer past 278 * the method invocation namestring, so we need to restore the 279 * saved AML pointer back to the original method invocation 280 * namestring. 281 */ 282 walk_state->parser_state.aml = start; 283 walk_state->arg_count = 1; 284 acpi_ps_init_op(arg, AML_INT_METHODCALL_OP); 285 } 286 287 /* This name is actually a control method invocation */ 288 289 method_desc = acpi_ns_get_attached_object(node); 290 ACPI_DEBUG_PRINT((ACPI_DB_PARSE, 291 "Control Method invocation %4.4s - %p Desc %p Path=%p\n", 292 node->name.ascii, node, method_desc, path)); 293 294 name_op = acpi_ps_alloc_op(AML_INT_NAMEPATH_OP, start); 295 if (!name_op) { 296 return_ACPI_STATUS(AE_NO_MEMORY); 297 } 298 299 /* Change Arg into a METHOD CALL and attach name to it */ 300 301 acpi_ps_init_op(arg, AML_INT_METHODCALL_OP); 302 name_op->common.value.name = path; 303 304 /* Point METHODCALL/NAME to the METHOD Node */ 305 306 name_op->common.node = node; 307 acpi_ps_append_arg(arg, name_op); 308 309 if (!method_desc) { 310 ACPI_ERROR((AE_INFO, 311 "Control Method %p has no attached object", 312 node)); 313 return_ACPI_STATUS(AE_AML_INTERNAL); 314 } 315 316 ACPI_DEBUG_PRINT((ACPI_DB_PARSE, 317 "Control Method - %p Args %X\n", 318 node, method_desc->method.param_count)); 319 320 /* Get the number of arguments to expect */ 321 322 walk_state->arg_count = method_desc->method.param_count; 323 return_ACPI_STATUS(AE_OK); 324 } 325 326 /* 327 * Special handling if the name was not found during the lookup - 328 * some not_found cases are allowed 329 */ 330 if (status == AE_NOT_FOUND) { 331 332 /* 1) not_found is ok during load pass 1/2 (allow forward references) */ 333 334 if ((walk_state->parse_flags & ACPI_PARSE_MODE_MASK) != 335 ACPI_PARSE_EXECUTE) { 336 status = AE_OK; 337 } 338 339 /* 2) not_found during a cond_ref_of(x) is ok by definition */ 340 341 else if (walk_state->op->common.aml_opcode == 342 AML_COND_REF_OF_OP) { 343 status = AE_OK; 344 } 345 346 /* 347 * 3) not_found while building a Package is ok at this point, we 348 * may flag as an error later if slack mode is not enabled. 349 * (Some ASL code depends on allowing this behavior) 350 */ 351 else if ((arg->common.parent) && 352 ((arg->common.parent->common.aml_opcode == 353 AML_PACKAGE_OP) 354 || (arg->common.parent->common.aml_opcode == 355 AML_VAR_PACKAGE_OP))) { 356 status = AE_OK; 357 } 358 } 359 360 /* Final exception check (may have been changed from code above) */ 361 362 if (ACPI_FAILURE(status)) { 363 ACPI_ERROR_NAMESPACE(path, status); 364 365 if ((walk_state->parse_flags & ACPI_PARSE_MODE_MASK) == 366 ACPI_PARSE_EXECUTE) { 367 368 /* Report a control method execution error */ 369 370 status = acpi_ds_method_error(status, walk_state); 371 } 372 } 373 374 /* Save the namepath */ 375 376 arg->common.value.name = path; 377 return_ACPI_STATUS(status); 378 } 379 380 /******************************************************************************* 381 * 382 * FUNCTION: acpi_ps_get_next_simple_arg 383 * 384 * PARAMETERS: parser_state - Current parser state object 385 * arg_type - The argument type (AML_*_ARG) 386 * arg - Where the argument is returned 387 * 388 * RETURN: None 389 * 390 * DESCRIPTION: Get the next simple argument (constant, string, or namestring) 391 * 392 ******************************************************************************/ 393 394 void 395 acpi_ps_get_next_simple_arg(struct acpi_parse_state *parser_state, 396 u32 arg_type, union acpi_parse_object *arg) 397 { 398 u32 length; 399 u16 opcode; 400 u8 *aml = parser_state->aml; 401 402 ACPI_FUNCTION_TRACE_U32(ps_get_next_simple_arg, arg_type); 403 404 switch (arg_type) { 405 case ARGP_BYTEDATA: 406 407 /* Get 1 byte from the AML stream */ 408 409 opcode = AML_BYTE_OP; 410 arg->common.value.integer = (u64) *aml; 411 length = 1; 412 break; 413 414 case ARGP_WORDDATA: 415 416 /* Get 2 bytes from the AML stream */ 417 418 opcode = AML_WORD_OP; 419 ACPI_MOVE_16_TO_64(&arg->common.value.integer, aml); 420 length = 2; 421 break; 422 423 case ARGP_DWORDDATA: 424 425 /* Get 4 bytes from the AML stream */ 426 427 opcode = AML_DWORD_OP; 428 ACPI_MOVE_32_TO_64(&arg->common.value.integer, aml); 429 length = 4; 430 break; 431 432 case ARGP_QWORDDATA: 433 434 /* Get 8 bytes from the AML stream */ 435 436 opcode = AML_QWORD_OP; 437 ACPI_MOVE_64_TO_64(&arg->common.value.integer, aml); 438 length = 8; 439 break; 440 441 case ARGP_CHARLIST: 442 443 /* Get a pointer to the string, point past the string */ 444 445 opcode = AML_STRING_OP; 446 arg->common.value.string = ACPI_CAST_PTR(char, aml); 447 448 /* Find the null terminator */ 449 450 length = 0; 451 while (aml[length]) { 452 length++; 453 } 454 length++; 455 break; 456 457 case ARGP_NAME: 458 case ARGP_NAMESTRING: 459 460 acpi_ps_init_op(arg, AML_INT_NAMEPATH_OP); 461 arg->common.value.name = 462 acpi_ps_get_next_namestring(parser_state); 463 return_VOID; 464 465 default: 466 467 ACPI_ERROR((AE_INFO, "Invalid ArgType 0x%X", arg_type)); 468 return_VOID; 469 } 470 471 acpi_ps_init_op(arg, opcode); 472 parser_state->aml += length; 473 return_VOID; 474 } 475 476 /******************************************************************************* 477 * 478 * FUNCTION: acpi_ps_get_next_field 479 * 480 * PARAMETERS: parser_state - Current parser state object 481 * 482 * RETURN: A newly allocated FIELD op 483 * 484 * DESCRIPTION: Get next field (named_field, reserved_field, or access_field) 485 * 486 ******************************************************************************/ 487 488 static union acpi_parse_object *acpi_ps_get_next_field(struct acpi_parse_state 489 *parser_state) 490 { 491 u8 *aml; 492 union acpi_parse_object *field; 493 union acpi_parse_object *arg = NULL; 494 u16 opcode; 495 u32 name; 496 u8 access_type; 497 u8 access_attribute; 498 u8 access_length; 499 u32 pkg_length; 500 u8 *pkg_end; 501 u32 buffer_length; 502 503 ACPI_FUNCTION_TRACE(ps_get_next_field); 504 505 aml = parser_state->aml; 506 507 /* Determine field type */ 508 509 switch (ACPI_GET8(parser_state->aml)) { 510 case AML_FIELD_OFFSET_OP: 511 512 opcode = AML_INT_RESERVEDFIELD_OP; 513 parser_state->aml++; 514 break; 515 516 case AML_FIELD_ACCESS_OP: 517 518 opcode = AML_INT_ACCESSFIELD_OP; 519 parser_state->aml++; 520 break; 521 522 case AML_FIELD_CONNECTION_OP: 523 524 opcode = AML_INT_CONNECTION_OP; 525 parser_state->aml++; 526 break; 527 528 case AML_FIELD_EXT_ACCESS_OP: 529 530 opcode = AML_INT_EXTACCESSFIELD_OP; 531 parser_state->aml++; 532 break; 533 534 default: 535 536 opcode = AML_INT_NAMEDFIELD_OP; 537 break; 538 } 539 540 /* Allocate a new field op */ 541 542 field = acpi_ps_alloc_op(opcode, aml); 543 if (!field) { 544 return_PTR(NULL); 545 } 546 547 /* Decode the field type */ 548 549 switch (opcode) { 550 case AML_INT_NAMEDFIELD_OP: 551 552 /* Get the 4-character name */ 553 554 ACPI_MOVE_32_TO_32(&name, parser_state->aml); 555 acpi_ps_set_name(field, name); 556 parser_state->aml += ACPI_NAME_SIZE; 557 558 /* Get the length which is encoded as a package length */ 559 560 field->common.value.size = 561 acpi_ps_get_next_package_length(parser_state); 562 break; 563 564 case AML_INT_RESERVEDFIELD_OP: 565 566 /* Get the length which is encoded as a package length */ 567 568 field->common.value.size = 569 acpi_ps_get_next_package_length(parser_state); 570 break; 571 572 case AML_INT_ACCESSFIELD_OP: 573 case AML_INT_EXTACCESSFIELD_OP: 574 575 /* 576 * Get access_type and access_attrib and merge into the field Op 577 * access_type is first operand, access_attribute is second. stuff 578 * these bytes into the node integer value for convenience. 579 */ 580 581 /* Get the two bytes (Type/Attribute) */ 582 583 access_type = ACPI_GET8(parser_state->aml); 584 parser_state->aml++; 585 access_attribute = ACPI_GET8(parser_state->aml); 586 parser_state->aml++; 587 588 field->common.value.integer = (u8)access_type; 589 field->common.value.integer |= (u16)(access_attribute << 8); 590 591 /* This opcode has a third byte, access_length */ 592 593 if (opcode == AML_INT_EXTACCESSFIELD_OP) { 594 access_length = ACPI_GET8(parser_state->aml); 595 parser_state->aml++; 596 597 field->common.value.integer |= 598 (u32)(access_length << 16); 599 } 600 break; 601 602 case AML_INT_CONNECTION_OP: 603 604 /* 605 * Argument for Connection operator can be either a Buffer 606 * (resource descriptor), or a name_string. 607 */ 608 aml = parser_state->aml; 609 if (ACPI_GET8(parser_state->aml) == AML_BUFFER_OP) { 610 parser_state->aml++; 611 612 pkg_end = parser_state->aml; 613 pkg_length = 614 acpi_ps_get_next_package_length(parser_state); 615 pkg_end += pkg_length; 616 617 if (parser_state->aml < pkg_end) { 618 619 /* Non-empty list */ 620 621 arg = 622 acpi_ps_alloc_op(AML_INT_BYTELIST_OP, aml); 623 if (!arg) { 624 acpi_ps_free_op(field); 625 return_PTR(NULL); 626 } 627 628 /* Get the actual buffer length argument */ 629 630 opcode = ACPI_GET8(parser_state->aml); 631 parser_state->aml++; 632 633 switch (opcode) { 634 case AML_BYTE_OP: /* AML_BYTEDATA_ARG */ 635 636 buffer_length = 637 ACPI_GET8(parser_state->aml); 638 parser_state->aml += 1; 639 break; 640 641 case AML_WORD_OP: /* AML_WORDDATA_ARG */ 642 643 buffer_length = 644 ACPI_GET16(parser_state->aml); 645 parser_state->aml += 2; 646 break; 647 648 case AML_DWORD_OP: /* AML_DWORDATA_ARG */ 649 650 buffer_length = 651 ACPI_GET32(parser_state->aml); 652 parser_state->aml += 4; 653 break; 654 655 default: 656 657 buffer_length = 0; 658 break; 659 } 660 661 /* Fill in bytelist data */ 662 663 arg->named.value.size = buffer_length; 664 arg->named.data = parser_state->aml; 665 } 666 667 /* Skip to End of byte data */ 668 669 parser_state->aml = pkg_end; 670 } else { 671 arg = acpi_ps_alloc_op(AML_INT_NAMEPATH_OP, aml); 672 if (!arg) { 673 acpi_ps_free_op(field); 674 return_PTR(NULL); 675 } 676 677 /* Get the Namestring argument */ 678 679 arg->common.value.name = 680 acpi_ps_get_next_namestring(parser_state); 681 } 682 683 /* Link the buffer/namestring to parent (CONNECTION_OP) */ 684 685 acpi_ps_append_arg(field, arg); 686 break; 687 688 default: 689 690 /* Opcode was set in previous switch */ 691 break; 692 } 693 694 return_PTR(field); 695 } 696 697 /******************************************************************************* 698 * 699 * FUNCTION: acpi_ps_get_next_arg 700 * 701 * PARAMETERS: walk_state - Current state 702 * parser_state - Current parser state object 703 * arg_type - The argument type (AML_*_ARG) 704 * return_arg - Where the next arg is returned 705 * 706 * RETURN: Status, and an op object containing the next argument. 707 * 708 * DESCRIPTION: Get next argument (including complex list arguments that require 709 * pushing the parser stack) 710 * 711 ******************************************************************************/ 712 713 acpi_status 714 acpi_ps_get_next_arg(struct acpi_walk_state *walk_state, 715 struct acpi_parse_state *parser_state, 716 u32 arg_type, union acpi_parse_object **return_arg) 717 { 718 union acpi_parse_object *arg = NULL; 719 union acpi_parse_object *prev = NULL; 720 union acpi_parse_object *field; 721 u32 subop; 722 acpi_status status = AE_OK; 723 724 ACPI_FUNCTION_TRACE_PTR(ps_get_next_arg, parser_state); 725 726 ACPI_DEBUG_PRINT((ACPI_DB_PARSE, 727 "Expected argument type ARGP: %s (%2.2X)\n", 728 acpi_ut_get_argument_type_name(arg_type), arg_type)); 729 730 switch (arg_type) { 731 case ARGP_BYTEDATA: 732 case ARGP_WORDDATA: 733 case ARGP_DWORDDATA: 734 case ARGP_CHARLIST: 735 case ARGP_NAME: 736 case ARGP_NAMESTRING: 737 738 /* Constants, strings, and namestrings are all the same size */ 739 740 arg = acpi_ps_alloc_op(AML_BYTE_OP, parser_state->aml); 741 if (!arg) { 742 return_ACPI_STATUS(AE_NO_MEMORY); 743 } 744 745 acpi_ps_get_next_simple_arg(parser_state, arg_type, arg); 746 break; 747 748 case ARGP_PKGLENGTH: 749 750 /* Package length, nothing returned */ 751 752 parser_state->pkg_end = 753 acpi_ps_get_next_package_end(parser_state); 754 break; 755 756 case ARGP_FIELDLIST: 757 758 if (parser_state->aml < parser_state->pkg_end) { 759 760 /* Non-empty list */ 761 762 while (parser_state->aml < parser_state->pkg_end) { 763 field = acpi_ps_get_next_field(parser_state); 764 if (!field) { 765 return_ACPI_STATUS(AE_NO_MEMORY); 766 } 767 768 if (prev) { 769 prev->common.next = field; 770 } else { 771 arg = field; 772 } 773 prev = field; 774 } 775 776 /* Skip to End of byte data */ 777 778 parser_state->aml = parser_state->pkg_end; 779 } 780 break; 781 782 case ARGP_BYTELIST: 783 784 if (parser_state->aml < parser_state->pkg_end) { 785 786 /* Non-empty list */ 787 788 arg = acpi_ps_alloc_op(AML_INT_BYTELIST_OP, 789 parser_state->aml); 790 if (!arg) { 791 return_ACPI_STATUS(AE_NO_MEMORY); 792 } 793 794 /* Fill in bytelist data */ 795 796 arg->common.value.size = (u32) 797 ACPI_PTR_DIFF(parser_state->pkg_end, 798 parser_state->aml); 799 arg->named.data = parser_state->aml; 800 801 /* Skip to End of byte data */ 802 803 parser_state->aml = parser_state->pkg_end; 804 } 805 break; 806 807 case ARGP_SIMPLENAME: 808 case ARGP_NAME_OR_REF: 809 810 ACPI_DEBUG_PRINT((ACPI_DB_PARSE, 811 "**** SimpleName/NameOrRef: %s (%2.2X)\n", 812 acpi_ut_get_argument_type_name(arg_type), 813 arg_type)); 814 815 subop = acpi_ps_peek_opcode(parser_state); 816 if (subop == 0 || 817 acpi_ps_is_leading_char(subop) || 818 ACPI_IS_ROOT_PREFIX(subop) || 819 ACPI_IS_PARENT_PREFIX(subop)) { 820 821 /* null_name or name_string */ 822 823 arg = 824 acpi_ps_alloc_op(AML_INT_NAMEPATH_OP, 825 parser_state->aml); 826 if (!arg) { 827 return_ACPI_STATUS(AE_NO_MEMORY); 828 } 829 830 status = 831 acpi_ps_get_next_namepath(walk_state, parser_state, 832 arg, 833 ACPI_NOT_METHOD_CALL); 834 } else { 835 /* Single complex argument, nothing returned */ 836 837 walk_state->arg_count = 1; 838 } 839 break; 840 841 case ARGP_TARGET: 842 case ARGP_SUPERNAME: 843 844 ACPI_DEBUG_PRINT((ACPI_DB_PARSE, 845 "**** Target/Supername: %s (%2.2X)\n", 846 acpi_ut_get_argument_type_name(arg_type), 847 arg_type)); 848 849 subop = acpi_ps_peek_opcode(parser_state); 850 if (subop == 0 || 851 acpi_ps_is_leading_char(subop) || 852 ACPI_IS_ROOT_PREFIX(subop) || 853 ACPI_IS_PARENT_PREFIX(subop)) { 854 855 /* NULL target (zero). Convert to a NULL namepath */ 856 857 arg = 858 acpi_ps_alloc_op(AML_INT_NAMEPATH_OP, 859 parser_state->aml); 860 if (!arg) { 861 return_ACPI_STATUS(AE_NO_MEMORY); 862 } 863 864 status = 865 acpi_ps_get_next_namepath(walk_state, parser_state, 866 arg, 867 ACPI_POSSIBLE_METHOD_CALL); 868 869 if (arg->common.aml_opcode == AML_INT_METHODCALL_OP) { 870 acpi_ps_free_op(arg); 871 arg = NULL; 872 walk_state->arg_count = 1; 873 } 874 } else { 875 /* Single complex argument, nothing returned */ 876 877 walk_state->arg_count = 1; 878 } 879 break; 880 881 case ARGP_DATAOBJ: 882 case ARGP_TERMARG: 883 884 ACPI_DEBUG_PRINT((ACPI_DB_PARSE, 885 "**** TermArg/DataObj: %s (%2.2X)\n", 886 acpi_ut_get_argument_type_name(arg_type), 887 arg_type)); 888 889 /* Single complex argument, nothing returned */ 890 891 walk_state->arg_count = 1; 892 break; 893 894 case ARGP_DATAOBJLIST: 895 case ARGP_TERMLIST: 896 case ARGP_OBJLIST: 897 898 if (parser_state->aml < parser_state->pkg_end) { 899 900 /* Non-empty list of variable arguments, nothing returned */ 901 902 walk_state->arg_count = ACPI_VAR_ARGS; 903 } 904 break; 905 906 default: 907 908 ACPI_ERROR((AE_INFO, "Invalid ArgType: 0x%X", arg_type)); 909 status = AE_AML_OPERAND_TYPE; 910 break; 911 } 912 913 *return_arg = arg; 914 return_ACPI_STATUS(status); 915 } 916