1 /****************************************************************************** 2 * 3 * Module Name: psargs - Parse AML opcode arguments 4 * 5 *****************************************************************************/ 6 7 /* 8 * Copyright (C) 2000 - 2016, 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 /* 275 * acpi_ps_get_next_namestring has increased the AML pointer, 276 * so we need to restore the saved AML pointer for method call. 277 */ 278 walk_state->parser_state.aml = start; 279 walk_state->arg_count = 1; 280 acpi_ps_init_op(arg, AML_INT_METHODCALL_OP); 281 return_ACPI_STATUS(AE_OK); 282 } 283 284 /* This name is actually a control method invocation */ 285 286 method_desc = acpi_ns_get_attached_object(node); 287 ACPI_DEBUG_PRINT((ACPI_DB_PARSE, 288 "Control Method - %p Desc %p Path=%p\n", node, 289 method_desc, path)); 290 291 name_op = acpi_ps_alloc_op(AML_INT_NAMEPATH_OP, start); 292 if (!name_op) { 293 return_ACPI_STATUS(AE_NO_MEMORY); 294 } 295 296 /* Change Arg into a METHOD CALL and attach name to it */ 297 298 acpi_ps_init_op(arg, AML_INT_METHODCALL_OP); 299 name_op->common.value.name = path; 300 301 /* Point METHODCALL/NAME to the METHOD Node */ 302 303 name_op->common.node = node; 304 acpi_ps_append_arg(arg, name_op); 305 306 if (!method_desc) { 307 ACPI_ERROR((AE_INFO, 308 "Control Method %p has no attached object", 309 node)); 310 return_ACPI_STATUS(AE_AML_INTERNAL); 311 } 312 313 ACPI_DEBUG_PRINT((ACPI_DB_PARSE, 314 "Control Method - %p Args %X\n", 315 node, method_desc->method.param_count)); 316 317 /* Get the number of arguments to expect */ 318 319 walk_state->arg_count = method_desc->method.param_count; 320 return_ACPI_STATUS(AE_OK); 321 } 322 323 /* 324 * Special handling if the name was not found during the lookup - 325 * some not_found cases are allowed 326 */ 327 if (status == AE_NOT_FOUND) { 328 329 /* 1) not_found is ok during load pass 1/2 (allow forward references) */ 330 331 if ((walk_state->parse_flags & ACPI_PARSE_MODE_MASK) != 332 ACPI_PARSE_EXECUTE) { 333 status = AE_OK; 334 } 335 336 /* 2) not_found during a cond_ref_of(x) is ok by definition */ 337 338 else if (walk_state->op->common.aml_opcode == 339 AML_COND_REF_OF_OP) { 340 status = AE_OK; 341 } 342 343 /* 344 * 3) not_found while building a Package is ok at this point, we 345 * may flag as an error later if slack mode is not enabled. 346 * (Some ASL code depends on allowing this behavior) 347 */ 348 else if ((arg->common.parent) && 349 ((arg->common.parent->common.aml_opcode == 350 AML_PACKAGE_OP) 351 || (arg->common.parent->common.aml_opcode == 352 AML_VAR_PACKAGE_OP))) { 353 status = AE_OK; 354 } 355 } 356 357 /* Final exception check (may have been changed from code above) */ 358 359 if (ACPI_FAILURE(status)) { 360 ACPI_ERROR_NAMESPACE(path, status); 361 362 if ((walk_state->parse_flags & ACPI_PARSE_MODE_MASK) == 363 ACPI_PARSE_EXECUTE) { 364 365 /* Report a control method execution error */ 366 367 status = acpi_ds_method_error(status, walk_state); 368 } 369 } 370 371 /* Save the namepath */ 372 373 arg->common.value.name = path; 374 return_ACPI_STATUS(status); 375 } 376 377 /******************************************************************************* 378 * 379 * FUNCTION: acpi_ps_get_next_simple_arg 380 * 381 * PARAMETERS: parser_state - Current parser state object 382 * arg_type - The argument type (AML_*_ARG) 383 * arg - Where the argument is returned 384 * 385 * RETURN: None 386 * 387 * DESCRIPTION: Get the next simple argument (constant, string, or namestring) 388 * 389 ******************************************************************************/ 390 391 void 392 acpi_ps_get_next_simple_arg(struct acpi_parse_state *parser_state, 393 u32 arg_type, union acpi_parse_object *arg) 394 { 395 u32 length; 396 u16 opcode; 397 u8 *aml = parser_state->aml; 398 399 ACPI_FUNCTION_TRACE_U32(ps_get_next_simple_arg, arg_type); 400 401 switch (arg_type) { 402 case ARGP_BYTEDATA: 403 404 /* Get 1 byte from the AML stream */ 405 406 opcode = AML_BYTE_OP; 407 arg->common.value.integer = (u64) *aml; 408 length = 1; 409 break; 410 411 case ARGP_WORDDATA: 412 413 /* Get 2 bytes from the AML stream */ 414 415 opcode = AML_WORD_OP; 416 ACPI_MOVE_16_TO_64(&arg->common.value.integer, aml); 417 length = 2; 418 break; 419 420 case ARGP_DWORDDATA: 421 422 /* Get 4 bytes from the AML stream */ 423 424 opcode = AML_DWORD_OP; 425 ACPI_MOVE_32_TO_64(&arg->common.value.integer, aml); 426 length = 4; 427 break; 428 429 case ARGP_QWORDDATA: 430 431 /* Get 8 bytes from the AML stream */ 432 433 opcode = AML_QWORD_OP; 434 ACPI_MOVE_64_TO_64(&arg->common.value.integer, aml); 435 length = 8; 436 break; 437 438 case ARGP_CHARLIST: 439 440 /* Get a pointer to the string, point past the string */ 441 442 opcode = AML_STRING_OP; 443 arg->common.value.string = ACPI_CAST_PTR(char, aml); 444 445 /* Find the null terminator */ 446 447 length = 0; 448 while (aml[length]) { 449 length++; 450 } 451 length++; 452 break; 453 454 case ARGP_NAME: 455 case ARGP_NAMESTRING: 456 457 acpi_ps_init_op(arg, AML_INT_NAMEPATH_OP); 458 arg->common.value.name = 459 acpi_ps_get_next_namestring(parser_state); 460 return_VOID; 461 462 default: 463 464 ACPI_ERROR((AE_INFO, "Invalid ArgType 0x%X", arg_type)); 465 return_VOID; 466 } 467 468 acpi_ps_init_op(arg, opcode); 469 parser_state->aml += length; 470 return_VOID; 471 } 472 473 /******************************************************************************* 474 * 475 * FUNCTION: acpi_ps_get_next_field 476 * 477 * PARAMETERS: parser_state - Current parser state object 478 * 479 * RETURN: A newly allocated FIELD op 480 * 481 * DESCRIPTION: Get next field (named_field, reserved_field, or access_field) 482 * 483 ******************************************************************************/ 484 485 static union acpi_parse_object *acpi_ps_get_next_field(struct acpi_parse_state 486 *parser_state) 487 { 488 u8 *aml; 489 union acpi_parse_object *field; 490 union acpi_parse_object *arg = NULL; 491 u16 opcode; 492 u32 name; 493 u8 access_type; 494 u8 access_attribute; 495 u8 access_length; 496 u32 pkg_length; 497 u8 *pkg_end; 498 u32 buffer_length; 499 500 ACPI_FUNCTION_TRACE(ps_get_next_field); 501 502 aml = parser_state->aml; 503 504 /* Determine field type */ 505 506 switch (ACPI_GET8(parser_state->aml)) { 507 case AML_FIELD_OFFSET_OP: 508 509 opcode = AML_INT_RESERVEDFIELD_OP; 510 parser_state->aml++; 511 break; 512 513 case AML_FIELD_ACCESS_OP: 514 515 opcode = AML_INT_ACCESSFIELD_OP; 516 parser_state->aml++; 517 break; 518 519 case AML_FIELD_CONNECTION_OP: 520 521 opcode = AML_INT_CONNECTION_OP; 522 parser_state->aml++; 523 break; 524 525 case AML_FIELD_EXT_ACCESS_OP: 526 527 opcode = AML_INT_EXTACCESSFIELD_OP; 528 parser_state->aml++; 529 break; 530 531 default: 532 533 opcode = AML_INT_NAMEDFIELD_OP; 534 break; 535 } 536 537 /* Allocate a new field op */ 538 539 field = acpi_ps_alloc_op(opcode, aml); 540 if (!field) { 541 return_PTR(NULL); 542 } 543 544 /* Decode the field type */ 545 546 switch (opcode) { 547 case AML_INT_NAMEDFIELD_OP: 548 549 /* Get the 4-character name */ 550 551 ACPI_MOVE_32_TO_32(&name, parser_state->aml); 552 acpi_ps_set_name(field, name); 553 parser_state->aml += ACPI_NAME_SIZE; 554 555 /* Get the length which is encoded as a package length */ 556 557 field->common.value.size = 558 acpi_ps_get_next_package_length(parser_state); 559 break; 560 561 case AML_INT_RESERVEDFIELD_OP: 562 563 /* Get the length which is encoded as a package length */ 564 565 field->common.value.size = 566 acpi_ps_get_next_package_length(parser_state); 567 break; 568 569 case AML_INT_ACCESSFIELD_OP: 570 case AML_INT_EXTACCESSFIELD_OP: 571 572 /* 573 * Get access_type and access_attrib and merge into the field Op 574 * access_type is first operand, access_attribute is second. stuff 575 * these bytes into the node integer value for convenience. 576 */ 577 578 /* Get the two bytes (Type/Attribute) */ 579 580 access_type = ACPI_GET8(parser_state->aml); 581 parser_state->aml++; 582 access_attribute = ACPI_GET8(parser_state->aml); 583 parser_state->aml++; 584 585 field->common.value.integer = (u8)access_type; 586 field->common.value.integer |= (u16)(access_attribute << 8); 587 588 /* This opcode has a third byte, access_length */ 589 590 if (opcode == AML_INT_EXTACCESSFIELD_OP) { 591 access_length = ACPI_GET8(parser_state->aml); 592 parser_state->aml++; 593 594 field->common.value.integer |= 595 (u32)(access_length << 16); 596 } 597 break; 598 599 case AML_INT_CONNECTION_OP: 600 601 /* 602 * Argument for Connection operator can be either a Buffer 603 * (resource descriptor), or a name_string. 604 */ 605 aml = parser_state->aml; 606 if (ACPI_GET8(parser_state->aml) == AML_BUFFER_OP) { 607 parser_state->aml++; 608 609 pkg_end = parser_state->aml; 610 pkg_length = 611 acpi_ps_get_next_package_length(parser_state); 612 pkg_end += pkg_length; 613 614 if (parser_state->aml < pkg_end) { 615 616 /* Non-empty list */ 617 618 arg = 619 acpi_ps_alloc_op(AML_INT_BYTELIST_OP, aml); 620 if (!arg) { 621 acpi_ps_free_op(field); 622 return_PTR(NULL); 623 } 624 625 /* Get the actual buffer length argument */ 626 627 opcode = ACPI_GET8(parser_state->aml); 628 parser_state->aml++; 629 630 switch (opcode) { 631 case AML_BYTE_OP: /* AML_BYTEDATA_ARG */ 632 633 buffer_length = 634 ACPI_GET8(parser_state->aml); 635 parser_state->aml += 1; 636 break; 637 638 case AML_WORD_OP: /* AML_WORDDATA_ARG */ 639 640 buffer_length = 641 ACPI_GET16(parser_state->aml); 642 parser_state->aml += 2; 643 break; 644 645 case AML_DWORD_OP: /* AML_DWORDATA_ARG */ 646 647 buffer_length = 648 ACPI_GET32(parser_state->aml); 649 parser_state->aml += 4; 650 break; 651 652 default: 653 654 buffer_length = 0; 655 break; 656 } 657 658 /* Fill in bytelist data */ 659 660 arg->named.value.size = buffer_length; 661 arg->named.data = parser_state->aml; 662 } 663 664 /* Skip to End of byte data */ 665 666 parser_state->aml = pkg_end; 667 } else { 668 arg = acpi_ps_alloc_op(AML_INT_NAMEPATH_OP, aml); 669 if (!arg) { 670 acpi_ps_free_op(field); 671 return_PTR(NULL); 672 } 673 674 /* Get the Namestring argument */ 675 676 arg->common.value.name = 677 acpi_ps_get_next_namestring(parser_state); 678 } 679 680 /* Link the buffer/namestring to parent (CONNECTION_OP) */ 681 682 acpi_ps_append_arg(field, arg); 683 break; 684 685 default: 686 687 /* Opcode was set in previous switch */ 688 break; 689 } 690 691 return_PTR(field); 692 } 693 694 /******************************************************************************* 695 * 696 * FUNCTION: acpi_ps_get_next_arg 697 * 698 * PARAMETERS: walk_state - Current state 699 * parser_state - Current parser state object 700 * arg_type - The parser argument type (ARGP_*) 701 * return_arg - Where the next arg is returned 702 * 703 * RETURN: Status, and an op object containing the next argument. 704 * 705 * DESCRIPTION: Get next argument (including complex list arguments that require 706 * pushing the parser stack) 707 * 708 ******************************************************************************/ 709 710 acpi_status 711 acpi_ps_get_next_arg(struct acpi_walk_state *walk_state, 712 struct acpi_parse_state *parser_state, 713 u32 arg_type, union acpi_parse_object **return_arg) 714 { 715 union acpi_parse_object *arg = NULL; 716 union acpi_parse_object *prev = NULL; 717 union acpi_parse_object *field; 718 u32 subop; 719 acpi_status status = AE_OK; 720 721 ACPI_FUNCTION_TRACE_PTR(ps_get_next_arg, parser_state); 722 723 switch (arg_type) { 724 case ARGP_BYTEDATA: 725 case ARGP_WORDDATA: 726 case ARGP_DWORDDATA: 727 case ARGP_CHARLIST: 728 case ARGP_NAME: 729 case ARGP_NAMESTRING: 730 731 /* Constants, strings, and namestrings are all the same size */ 732 733 arg = acpi_ps_alloc_op(AML_BYTE_OP, parser_state->aml); 734 if (!arg) { 735 return_ACPI_STATUS(AE_NO_MEMORY); 736 } 737 738 acpi_ps_get_next_simple_arg(parser_state, arg_type, arg); 739 break; 740 741 case ARGP_PKGLENGTH: 742 743 /* Package length, nothing returned */ 744 745 parser_state->pkg_end = 746 acpi_ps_get_next_package_end(parser_state); 747 break; 748 749 case ARGP_FIELDLIST: 750 751 if (parser_state->aml < parser_state->pkg_end) { 752 753 /* Non-empty list */ 754 755 while (parser_state->aml < parser_state->pkg_end) { 756 field = acpi_ps_get_next_field(parser_state); 757 if (!field) { 758 return_ACPI_STATUS(AE_NO_MEMORY); 759 } 760 761 if (prev) { 762 prev->common.next = field; 763 } else { 764 arg = field; 765 } 766 prev = field; 767 } 768 769 /* Skip to End of byte data */ 770 771 parser_state->aml = parser_state->pkg_end; 772 } 773 break; 774 775 case ARGP_BYTELIST: 776 777 if (parser_state->aml < parser_state->pkg_end) { 778 779 /* Non-empty list */ 780 781 arg = acpi_ps_alloc_op(AML_INT_BYTELIST_OP, 782 parser_state->aml); 783 if (!arg) { 784 return_ACPI_STATUS(AE_NO_MEMORY); 785 } 786 787 /* Fill in bytelist data */ 788 789 arg->common.value.size = (u32) 790 ACPI_PTR_DIFF(parser_state->pkg_end, 791 parser_state->aml); 792 arg->named.data = parser_state->aml; 793 794 /* Skip to End of byte data */ 795 796 parser_state->aml = parser_state->pkg_end; 797 } 798 break; 799 800 case ARGP_TARGET: 801 case ARGP_SUPERNAME: 802 case ARGP_SIMPLENAME: 803 case ARGP_NAME_OR_REF: 804 805 subop = acpi_ps_peek_opcode(parser_state); 806 if (subop == 0 || 807 acpi_ps_is_leading_char(subop) || 808 ACPI_IS_ROOT_PREFIX(subop) || 809 ACPI_IS_PARENT_PREFIX(subop)) { 810 811 /* null_name or name_string */ 812 813 arg = 814 acpi_ps_alloc_op(AML_INT_NAMEPATH_OP, 815 parser_state->aml); 816 if (!arg) { 817 return_ACPI_STATUS(AE_NO_MEMORY); 818 } 819 820 /* super_name allows argument to be a method call */ 821 822 if (arg_type == ARGP_SUPERNAME) { 823 status = 824 acpi_ps_get_next_namepath(walk_state, 825 parser_state, arg, 826 ACPI_POSSIBLE_METHOD_CALL); 827 828 /* 829 * If the super_name argument is a method call, we have 830 * already restored the AML pointer, just free this Arg 831 */ 832 if (arg->common.aml_opcode == 833 AML_INT_METHODCALL_OP) { 834 acpi_ps_free_op(arg); 835 arg = NULL; 836 } 837 } else { 838 status = 839 acpi_ps_get_next_namepath(walk_state, 840 parser_state, arg, 841 ACPI_NOT_METHOD_CALL); 842 } 843 } else { 844 /* Single complex argument, nothing returned */ 845 846 walk_state->arg_count = 1; 847 } 848 break; 849 850 case ARGP_DATAOBJ: 851 case ARGP_TERMARG: 852 853 /* Single complex argument, nothing returned */ 854 855 walk_state->arg_count = 1; 856 break; 857 858 case ARGP_DATAOBJLIST: 859 case ARGP_TERMLIST: 860 case ARGP_OBJLIST: 861 862 if (parser_state->aml < parser_state->pkg_end) { 863 864 /* Non-empty list of variable arguments, nothing returned */ 865 866 walk_state->arg_count = ACPI_VAR_ARGS; 867 } 868 break; 869 870 default: 871 872 ACPI_ERROR((AE_INFO, "Invalid ArgType: 0x%X", arg_type)); 873 status = AE_AML_OPERAND_TYPE; 874 break; 875 } 876 877 *return_arg = arg; 878 return_ACPI_STATUS(status); 879 } 880