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.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 56 static UINT32 57 AcpiPsGetNextPackageLength ( 58 ACPI_PARSE_STATE *ParserState); 59 60 static ACPI_PARSE_OBJECT * 61 AcpiPsGetNextField ( 62 ACPI_PARSE_STATE *ParserState); 63 64 65 /******************************************************************************* 66 * 67 * FUNCTION: AcpiPsGetNextPackageLength 68 * 69 * PARAMETERS: ParserState - Current parser state object 70 * 71 * RETURN: Decoded package length. On completion, the AML pointer points 72 * past the length byte or bytes. 73 * 74 * DESCRIPTION: Decode and return a package length field. 75 * Note: Largest package length is 28 bits, from ACPI specification 76 * 77 ******************************************************************************/ 78 79 static UINT32 80 AcpiPsGetNextPackageLength ( 81 ACPI_PARSE_STATE *ParserState) 82 { 83 UINT8 *Aml = ParserState->Aml; 84 UINT32 PackageLength = 0; 85 UINT32 ByteCount; 86 UINT8 ByteZeroMask = 0x3F; /* Default [0:5] */ 87 88 89 ACPI_FUNCTION_TRACE (PsGetNextPackageLength); 90 91 92 /* 93 * Byte 0 bits [6:7] contain the number of additional bytes 94 * used to encode the package length, either 0,1,2, or 3 95 */ 96 ByteCount = (Aml[0] >> 6); 97 ParserState->Aml += ((ACPI_SIZE) ByteCount + 1); 98 99 /* Get bytes 3, 2, 1 as needed */ 100 101 while (ByteCount) 102 { 103 /* 104 * Final bit positions for the package length bytes: 105 * Byte3->[20:27] 106 * Byte2->[12:19] 107 * Byte1->[04:11] 108 * Byte0->[00:03] 109 */ 110 PackageLength |= (Aml[ByteCount] << ((ByteCount << 3) - 4)); 111 112 ByteZeroMask = 0x0F; /* Use bits [0:3] of byte 0 */ 113 ByteCount--; 114 } 115 116 /* Byte 0 is a special case, either bits [0:3] or [0:5] are used */ 117 118 PackageLength |= (Aml[0] & ByteZeroMask); 119 return_UINT32 (PackageLength); 120 } 121 122 123 /******************************************************************************* 124 * 125 * FUNCTION: AcpiPsGetNextPackageEnd 126 * 127 * PARAMETERS: ParserState - Current parser state object 128 * 129 * RETURN: Pointer to end-of-package +1 130 * 131 * DESCRIPTION: Get next package length and return a pointer past the end of 132 * the package. Consumes the package length field 133 * 134 ******************************************************************************/ 135 136 UINT8 * 137 AcpiPsGetNextPackageEnd ( 138 ACPI_PARSE_STATE *ParserState) 139 { 140 UINT8 *Start = ParserState->Aml; 141 UINT32 PackageLength; 142 143 144 ACPI_FUNCTION_TRACE (PsGetNextPackageEnd); 145 146 147 /* Function below updates ParserState->Aml */ 148 149 PackageLength = AcpiPsGetNextPackageLength (ParserState); 150 151 return_PTR (Start + PackageLength); /* end of package */ 152 } 153 154 155 /******************************************************************************* 156 * 157 * FUNCTION: AcpiPsGetNextNamestring 158 * 159 * PARAMETERS: ParserState - Current parser state object 160 * 161 * RETURN: Pointer to the start of the name string (pointer points into 162 * the AML. 163 * 164 * DESCRIPTION: Get next raw namestring within the AML stream. Handles all name 165 * prefix characters. Set parser state to point past the string. 166 * (Name is consumed from the AML.) 167 * 168 ******************************************************************************/ 169 170 char * 171 AcpiPsGetNextNamestring ( 172 ACPI_PARSE_STATE *ParserState) 173 { 174 UINT8 *Start = ParserState->Aml; 175 UINT8 *End = ParserState->Aml; 176 177 178 ACPI_FUNCTION_TRACE (PsGetNextNamestring); 179 180 181 /* Point past any namestring prefix characters (backslash or carat) */ 182 183 while (ACPI_IS_ROOT_PREFIX (*End) || 184 ACPI_IS_PARENT_PREFIX (*End)) 185 { 186 End++; 187 } 188 189 /* Decode the path prefix character */ 190 191 switch (*End) 192 { 193 case 0: 194 195 /* NullName */ 196 197 if (End == Start) 198 { 199 Start = NULL; 200 } 201 End++; 202 break; 203 204 case AML_DUAL_NAME_PREFIX: 205 206 /* Two name segments */ 207 208 End += 1 + (2 * ACPI_NAME_SIZE); 209 break; 210 211 case AML_MULTI_NAME_PREFIX_OP: 212 213 /* Multiple name segments, 4 chars each, count in next byte */ 214 215 End += 2 + (*(End + 1) * ACPI_NAME_SIZE); 216 break; 217 218 default: 219 220 /* Single name segment */ 221 222 End += ACPI_NAME_SIZE; 223 break; 224 } 225 226 ParserState->Aml = End; 227 return_PTR ((char *) Start); 228 } 229 230 231 /******************************************************************************* 232 * 233 * FUNCTION: AcpiPsGetNextNamepath 234 * 235 * PARAMETERS: ParserState - Current parser state object 236 * Arg - Where the namepath will be stored 237 * ArgCount - If the namepath points to a control method 238 * the method's argument is returned here. 239 * PossibleMethodCall - Whether the namepath can possibly be the 240 * start of a method call 241 * 242 * RETURN: Status 243 * 244 * DESCRIPTION: Get next name (if method call, return # of required args). 245 * Names are looked up in the internal namespace to determine 246 * if the name represents a control method. If a method 247 * is found, the number of arguments to the method is returned. 248 * This information is critical for parsing to continue correctly. 249 * 250 ******************************************************************************/ 251 252 ACPI_STATUS 253 AcpiPsGetNextNamepath ( 254 ACPI_WALK_STATE *WalkState, 255 ACPI_PARSE_STATE *ParserState, 256 ACPI_PARSE_OBJECT *Arg, 257 BOOLEAN PossibleMethodCall) 258 { 259 ACPI_STATUS Status; 260 char *Path; 261 ACPI_PARSE_OBJECT *NameOp; 262 ACPI_OPERAND_OBJECT *MethodDesc; 263 ACPI_NAMESPACE_NODE *Node; 264 UINT8 *Start = ParserState->Aml; 265 266 267 ACPI_FUNCTION_TRACE (PsGetNextNamepath); 268 269 270 Path = AcpiPsGetNextNamestring (ParserState); 271 AcpiPsInitOp (Arg, AML_INT_NAMEPATH_OP); 272 273 /* Null path case is allowed, just exit */ 274 275 if (!Path) 276 { 277 Arg->Common.Value.Name = Path; 278 return_ACPI_STATUS (AE_OK); 279 } 280 281 /* 282 * Lookup the name in the internal namespace, starting with the current 283 * scope. We don't want to add anything new to the namespace here, 284 * however, so we use MODE_EXECUTE. 285 * Allow searching of the parent tree, but don't open a new scope - 286 * we just want to lookup the object (must be mode EXECUTE to perform 287 * the upsearch) 288 */ 289 Status = AcpiNsLookup (WalkState->ScopeInfo, Path, 290 ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE, 291 ACPI_NS_SEARCH_PARENT | ACPI_NS_DONT_OPEN_SCOPE, NULL, &Node); 292 293 /* 294 * If this name is a control method invocation, we must 295 * setup the method call 296 */ 297 if (ACPI_SUCCESS (Status) && 298 PossibleMethodCall && 299 (Node->Type == ACPI_TYPE_METHOD)) 300 { 301 if (WalkState->Opcode == AML_UNLOAD_OP) 302 { 303 /* 304 * AcpiPsGetNextNamestring has increased the AML pointer, 305 * so we need to restore the saved AML pointer for method call. 306 */ 307 WalkState->ParserState.Aml = Start; 308 WalkState->ArgCount = 1; 309 AcpiPsInitOp (Arg, AML_INT_METHODCALL_OP); 310 return_ACPI_STATUS (AE_OK); 311 } 312 313 /* This name is actually a control method invocation */ 314 315 MethodDesc = AcpiNsGetAttachedObject (Node); 316 ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, 317 "Control Method - %p Desc %p Path=%p\n", Node, MethodDesc, Path)); 318 319 NameOp = AcpiPsAllocOp (AML_INT_NAMEPATH_OP, Start); 320 if (!NameOp) 321 { 322 return_ACPI_STATUS (AE_NO_MEMORY); 323 } 324 325 /* Change Arg into a METHOD CALL and attach name to it */ 326 327 AcpiPsInitOp (Arg, AML_INT_METHODCALL_OP); 328 NameOp->Common.Value.Name = Path; 329 330 /* Point METHODCALL/NAME to the METHOD Node */ 331 332 NameOp->Common.Node = Node; 333 AcpiPsAppendArg (Arg, NameOp); 334 335 if (!MethodDesc) 336 { 337 ACPI_ERROR ((AE_INFO, 338 "Control Method %p has no attached object", 339 Node)); 340 return_ACPI_STATUS (AE_AML_INTERNAL); 341 } 342 343 ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, 344 "Control Method - %p Args %X\n", 345 Node, MethodDesc->Method.ParamCount)); 346 347 /* Get the number of arguments to expect */ 348 349 WalkState->ArgCount = MethodDesc->Method.ParamCount; 350 return_ACPI_STATUS (AE_OK); 351 } 352 353 /* 354 * Special handling if the name was not found during the lookup - 355 * some NotFound cases are allowed 356 */ 357 if (Status == AE_NOT_FOUND) 358 { 359 /* 1) NotFound is ok during load pass 1/2 (allow forward references) */ 360 361 if ((WalkState->ParseFlags & ACPI_PARSE_MODE_MASK) != 362 ACPI_PARSE_EXECUTE) 363 { 364 Status = AE_OK; 365 } 366 367 /* 2) NotFound during a CondRefOf(x) is ok by definition */ 368 369 else if (WalkState->Op->Common.AmlOpcode == AML_COND_REF_OF_OP) 370 { 371 Status = AE_OK; 372 } 373 374 /* 375 * 3) NotFound while building a Package is ok at this point, we 376 * may flag as an error later if slack mode is not enabled. 377 * (Some ASL code depends on allowing this behavior) 378 */ 379 else if ((Arg->Common.Parent) && 380 ((Arg->Common.Parent->Common.AmlOpcode == AML_PACKAGE_OP) || 381 (Arg->Common.Parent->Common.AmlOpcode == AML_VAR_PACKAGE_OP))) 382 { 383 Status = AE_OK; 384 } 385 } 386 387 /* Final exception check (may have been changed from code above) */ 388 389 if (ACPI_FAILURE (Status)) 390 { 391 ACPI_ERROR_NAMESPACE (Path, Status); 392 393 if ((WalkState->ParseFlags & ACPI_PARSE_MODE_MASK) == 394 ACPI_PARSE_EXECUTE) 395 { 396 /* Report a control method execution error */ 397 398 Status = AcpiDsMethodError (Status, WalkState); 399 } 400 } 401 402 /* Save the namepath */ 403 404 Arg->Common.Value.Name = Path; 405 return_ACPI_STATUS (Status); 406 } 407 408 409 /******************************************************************************* 410 * 411 * FUNCTION: AcpiPsGetNextSimpleArg 412 * 413 * PARAMETERS: ParserState - Current parser state object 414 * ArgType - The argument type (AML_*_ARG) 415 * Arg - Where the argument is returned 416 * 417 * RETURN: None 418 * 419 * DESCRIPTION: Get the next simple argument (constant, string, or namestring) 420 * 421 ******************************************************************************/ 422 423 void 424 AcpiPsGetNextSimpleArg ( 425 ACPI_PARSE_STATE *ParserState, 426 UINT32 ArgType, 427 ACPI_PARSE_OBJECT *Arg) 428 { 429 UINT32 Length; 430 UINT16 Opcode; 431 UINT8 *Aml = ParserState->Aml; 432 433 434 ACPI_FUNCTION_TRACE_U32 (PsGetNextSimpleArg, ArgType); 435 436 437 switch (ArgType) 438 { 439 case ARGP_BYTEDATA: 440 441 /* Get 1 byte from the AML stream */ 442 443 Opcode = AML_BYTE_OP; 444 Arg->Common.Value.Integer = (UINT64) *Aml; 445 Length = 1; 446 break; 447 448 case ARGP_WORDDATA: 449 450 /* Get 2 bytes from the AML stream */ 451 452 Opcode = AML_WORD_OP; 453 ACPI_MOVE_16_TO_64 (&Arg->Common.Value.Integer, Aml); 454 Length = 2; 455 break; 456 457 case ARGP_DWORDDATA: 458 459 /* Get 4 bytes from the AML stream */ 460 461 Opcode = AML_DWORD_OP; 462 ACPI_MOVE_32_TO_64 (&Arg->Common.Value.Integer, Aml); 463 Length = 4; 464 break; 465 466 case ARGP_QWORDDATA: 467 468 /* Get 8 bytes from the AML stream */ 469 470 Opcode = AML_QWORD_OP; 471 ACPI_MOVE_64_TO_64 (&Arg->Common.Value.Integer, Aml); 472 Length = 8; 473 break; 474 475 case ARGP_CHARLIST: 476 477 /* Get a pointer to the string, point past the string */ 478 479 Opcode = AML_STRING_OP; 480 Arg->Common.Value.String = ACPI_CAST_PTR (char, Aml); 481 482 /* Find the null terminator */ 483 484 Length = 0; 485 while (Aml[Length]) 486 { 487 Length++; 488 } 489 Length++; 490 break; 491 492 case ARGP_NAME: 493 case ARGP_NAMESTRING: 494 495 AcpiPsInitOp (Arg, AML_INT_NAMEPATH_OP); 496 Arg->Common.Value.Name = AcpiPsGetNextNamestring (ParserState); 497 return_VOID; 498 499 default: 500 501 ACPI_ERROR ((AE_INFO, "Invalid ArgType 0x%X", ArgType)); 502 return_VOID; 503 } 504 505 AcpiPsInitOp (Arg, Opcode); 506 ParserState->Aml += Length; 507 return_VOID; 508 } 509 510 511 /******************************************************************************* 512 * 513 * FUNCTION: AcpiPsGetNextField 514 * 515 * PARAMETERS: ParserState - Current parser state object 516 * 517 * RETURN: A newly allocated FIELD op 518 * 519 * DESCRIPTION: Get next field (NamedField, ReservedField, or AccessField) 520 * 521 ******************************************************************************/ 522 523 static ACPI_PARSE_OBJECT * 524 AcpiPsGetNextField ( 525 ACPI_PARSE_STATE *ParserState) 526 { 527 UINT8 *Aml; 528 ACPI_PARSE_OBJECT *Field; 529 ACPI_PARSE_OBJECT *Arg = NULL; 530 UINT16 Opcode; 531 UINT32 Name; 532 UINT8 AccessType; 533 UINT8 AccessAttribute; 534 UINT8 AccessLength; 535 UINT32 PkgLength; 536 UINT8 *PkgEnd; 537 UINT32 BufferLength; 538 539 540 ACPI_FUNCTION_TRACE (PsGetNextField); 541 542 543 Aml = ParserState->Aml; 544 545 /* Determine field type */ 546 547 switch (ACPI_GET8 (ParserState->Aml)) 548 { 549 case AML_FIELD_OFFSET_OP: 550 551 Opcode = AML_INT_RESERVEDFIELD_OP; 552 ParserState->Aml++; 553 break; 554 555 case AML_FIELD_ACCESS_OP: 556 557 Opcode = AML_INT_ACCESSFIELD_OP; 558 ParserState->Aml++; 559 break; 560 561 case AML_FIELD_CONNECTION_OP: 562 563 Opcode = AML_INT_CONNECTION_OP; 564 ParserState->Aml++; 565 break; 566 567 case AML_FIELD_EXT_ACCESS_OP: 568 569 Opcode = AML_INT_EXTACCESSFIELD_OP; 570 ParserState->Aml++; 571 break; 572 573 default: 574 575 Opcode = AML_INT_NAMEDFIELD_OP; 576 break; 577 } 578 579 /* Allocate a new field op */ 580 581 Field = AcpiPsAllocOp (Opcode, Aml); 582 if (!Field) 583 { 584 return_PTR (NULL); 585 } 586 587 /* Decode the field type */ 588 589 switch (Opcode) 590 { 591 case AML_INT_NAMEDFIELD_OP: 592 593 /* Get the 4-character name */ 594 595 ACPI_MOVE_32_TO_32 (&Name, ParserState->Aml); 596 AcpiPsSetName (Field, Name); 597 ParserState->Aml += ACPI_NAME_SIZE; 598 599 /* Get the length which is encoded as a package length */ 600 601 Field->Common.Value.Size = AcpiPsGetNextPackageLength (ParserState); 602 break; 603 604 605 case AML_INT_RESERVEDFIELD_OP: 606 607 /* Get the length which is encoded as a package length */ 608 609 Field->Common.Value.Size = AcpiPsGetNextPackageLength (ParserState); 610 break; 611 612 613 case AML_INT_ACCESSFIELD_OP: 614 case AML_INT_EXTACCESSFIELD_OP: 615 616 /* 617 * Get AccessType and AccessAttrib and merge into the field Op 618 * AccessType is first operand, AccessAttribute is second. stuff 619 * these bytes into the node integer value for convenience. 620 */ 621 622 /* Get the two bytes (Type/Attribute) */ 623 624 AccessType = ACPI_GET8 (ParserState->Aml); 625 ParserState->Aml++; 626 AccessAttribute = ACPI_GET8 (ParserState->Aml); 627 ParserState->Aml++; 628 629 Field->Common.Value.Integer = (UINT8) AccessType; 630 Field->Common.Value.Integer |= (UINT16) (AccessAttribute << 8); 631 632 /* This opcode has a third byte, AccessLength */ 633 634 if (Opcode == AML_INT_EXTACCESSFIELD_OP) 635 { 636 AccessLength = ACPI_GET8 (ParserState->Aml); 637 ParserState->Aml++; 638 639 Field->Common.Value.Integer |= (UINT32) (AccessLength << 16); 640 } 641 break; 642 643 644 case AML_INT_CONNECTION_OP: 645 646 /* 647 * Argument for Connection operator can be either a Buffer 648 * (resource descriptor), or a NameString. 649 */ 650 Aml = ParserState->Aml; 651 if (ACPI_GET8 (ParserState->Aml) == AML_BUFFER_OP) 652 { 653 ParserState->Aml++; 654 655 PkgEnd = ParserState->Aml; 656 PkgLength = AcpiPsGetNextPackageLength (ParserState); 657 PkgEnd += PkgLength; 658 659 if (ParserState->Aml < PkgEnd) 660 { 661 /* Non-empty list */ 662 663 Arg = AcpiPsAllocOp (AML_INT_BYTELIST_OP, Aml); 664 if (!Arg) 665 { 666 AcpiPsFreeOp (Field); 667 return_PTR (NULL); 668 } 669 670 /* Get the actual buffer length argument */ 671 672 Opcode = ACPI_GET8 (ParserState->Aml); 673 ParserState->Aml++; 674 675 switch (Opcode) 676 { 677 case AML_BYTE_OP: /* AML_BYTEDATA_ARG */ 678 679 BufferLength = ACPI_GET8 (ParserState->Aml); 680 ParserState->Aml += 1; 681 break; 682 683 case AML_WORD_OP: /* AML_WORDDATA_ARG */ 684 685 BufferLength = ACPI_GET16 (ParserState->Aml); 686 ParserState->Aml += 2; 687 break; 688 689 case AML_DWORD_OP: /* AML_DWORDATA_ARG */ 690 691 BufferLength = ACPI_GET32 (ParserState->Aml); 692 ParserState->Aml += 4; 693 break; 694 695 default: 696 697 BufferLength = 0; 698 break; 699 } 700 701 /* Fill in bytelist data */ 702 703 Arg->Named.Value.Size = BufferLength; 704 Arg->Named.Data = ParserState->Aml; 705 } 706 707 /* Skip to End of byte data */ 708 709 ParserState->Aml = PkgEnd; 710 } 711 else 712 { 713 Arg = AcpiPsAllocOp (AML_INT_NAMEPATH_OP, Aml); 714 if (!Arg) 715 { 716 AcpiPsFreeOp (Field); 717 return_PTR (NULL); 718 } 719 720 /* Get the Namestring argument */ 721 722 Arg->Common.Value.Name = AcpiPsGetNextNamestring (ParserState); 723 } 724 725 /* Link the buffer/namestring to parent (CONNECTION_OP) */ 726 727 AcpiPsAppendArg (Field, Arg); 728 break; 729 730 731 default: 732 733 /* Opcode was set in previous switch */ 734 break; 735 } 736 737 return_PTR (Field); 738 } 739 740 741 /******************************************************************************* 742 * 743 * FUNCTION: AcpiPsGetNextArg 744 * 745 * PARAMETERS: WalkState - Current state 746 * ParserState - Current parser state object 747 * ArgType - The argument type (AML_*_ARG) 748 * ReturnArg - Where the next arg is returned 749 * 750 * RETURN: Status, and an op object containing the next argument. 751 * 752 * DESCRIPTION: Get next argument (including complex list arguments that require 753 * pushing the parser stack) 754 * 755 ******************************************************************************/ 756 757 ACPI_STATUS 758 AcpiPsGetNextArg ( 759 ACPI_WALK_STATE *WalkState, 760 ACPI_PARSE_STATE *ParserState, 761 UINT32 ArgType, 762 ACPI_PARSE_OBJECT **ReturnArg) 763 { 764 ACPI_PARSE_OBJECT *Arg = NULL; 765 ACPI_PARSE_OBJECT *Prev = NULL; 766 ACPI_PARSE_OBJECT *Field; 767 UINT32 Subop; 768 ACPI_STATUS Status = AE_OK; 769 770 771 ACPI_FUNCTION_TRACE_PTR (PsGetNextArg, ParserState); 772 773 774 switch (ArgType) 775 { 776 case ARGP_BYTEDATA: 777 case ARGP_WORDDATA: 778 case ARGP_DWORDDATA: 779 case ARGP_CHARLIST: 780 case ARGP_NAME: 781 case ARGP_NAMESTRING: 782 783 /* Constants, strings, and namestrings are all the same size */ 784 785 Arg = AcpiPsAllocOp (AML_BYTE_OP, ParserState->Aml); 786 if (!Arg) 787 { 788 return_ACPI_STATUS (AE_NO_MEMORY); 789 } 790 791 AcpiPsGetNextSimpleArg (ParserState, ArgType, Arg); 792 break; 793 794 case ARGP_PKGLENGTH: 795 796 /* Package length, nothing returned */ 797 798 ParserState->PkgEnd = AcpiPsGetNextPackageEnd (ParserState); 799 break; 800 801 case ARGP_FIELDLIST: 802 803 if (ParserState->Aml < ParserState->PkgEnd) 804 { 805 /* Non-empty list */ 806 807 while (ParserState->Aml < ParserState->PkgEnd) 808 { 809 Field = AcpiPsGetNextField (ParserState); 810 if (!Field) 811 { 812 return_ACPI_STATUS (AE_NO_MEMORY); 813 } 814 815 if (Prev) 816 { 817 Prev->Common.Next = Field; 818 } 819 else 820 { 821 Arg = Field; 822 } 823 Prev = Field; 824 } 825 826 /* Skip to End of byte data */ 827 828 ParserState->Aml = ParserState->PkgEnd; 829 } 830 break; 831 832 case ARGP_BYTELIST: 833 834 if (ParserState->Aml < ParserState->PkgEnd) 835 { 836 /* Non-empty list */ 837 838 Arg = AcpiPsAllocOp (AML_INT_BYTELIST_OP, 839 ParserState->Aml); 840 if (!Arg) 841 { 842 return_ACPI_STATUS (AE_NO_MEMORY); 843 } 844 845 /* Fill in bytelist data */ 846 847 Arg->Common.Value.Size = (UINT32) 848 ACPI_PTR_DIFF (ParserState->PkgEnd, ParserState->Aml); 849 Arg->Named.Data = ParserState->Aml; 850 851 /* Skip to End of byte data */ 852 853 ParserState->Aml = ParserState->PkgEnd; 854 } 855 break; 856 857 case ARGP_TARGET: 858 case ARGP_SUPERNAME: 859 case ARGP_SIMPLENAME: 860 case ARGP_NAME_OR_REF: 861 862 Subop = AcpiPsPeekOpcode (ParserState); 863 if (Subop == 0 || 864 AcpiPsIsLeadingChar (Subop) || 865 ACPI_IS_ROOT_PREFIX (Subop) || 866 ACPI_IS_PARENT_PREFIX (Subop)) 867 { 868 /* NullName or NameString */ 869 870 Arg = AcpiPsAllocOp (AML_INT_NAMEPATH_OP, ParserState->Aml); 871 if (!Arg) 872 { 873 return_ACPI_STATUS (AE_NO_MEMORY); 874 } 875 876 /* To support SuperName arg of Unload */ 877 878 if (WalkState->Opcode == AML_UNLOAD_OP) 879 { 880 Status = AcpiPsGetNextNamepath (WalkState, ParserState, 881 Arg, ACPI_POSSIBLE_METHOD_CALL); 882 883 /* 884 * If the SuperName argument is a method call, we have 885 * already restored the AML pointer, just free this Arg 886 */ 887 if (Arg->Common.AmlOpcode == AML_INT_METHODCALL_OP) 888 { 889 AcpiPsFreeOp (Arg); 890 Arg = NULL; 891 } 892 } 893 else 894 { 895 Status = AcpiPsGetNextNamepath (WalkState, ParserState, 896 Arg, ACPI_NOT_METHOD_CALL); 897 } 898 } 899 else 900 { 901 /* Single complex argument, nothing returned */ 902 903 WalkState->ArgCount = 1; 904 } 905 break; 906 907 case ARGP_DATAOBJ: 908 case ARGP_TERMARG: 909 910 /* Single complex argument, nothing returned */ 911 912 WalkState->ArgCount = 1; 913 break; 914 915 case ARGP_DATAOBJLIST: 916 case ARGP_TERMLIST: 917 case ARGP_OBJLIST: 918 919 if (ParserState->Aml < ParserState->PkgEnd) 920 { 921 /* Non-empty list of variable arguments, nothing returned */ 922 923 WalkState->ArgCount = ACPI_VAR_ARGS; 924 } 925 break; 926 927 default: 928 929 ACPI_ERROR ((AE_INFO, "Invalid ArgType: 0x%X", ArgType)); 930 Status = AE_AML_OPERAND_TYPE; 931 break; 932 } 933 934 *ReturnArg = Arg; 935 return_ACPI_STATUS (Status); 936 } 937