1/****************************************************************************** 2 * 3 * Module Name: psloop - Main AML parse loop 4 * 5 *****************************************************************************/ 6 7/****************************************************************************** 8 * 9 * 1. Copyright Notice 10 * 11 * Some or all of this work - Copyright (c) 1999 - 2023, Intel Corp. 12 * All rights reserved. 13 * 14 * 2. License 15 * 16 * 2.1. This is your license from Intel Corp. under its intellectual property 17 * rights. You may have additional license terms from the party that provided 18 * you this software, covering your right to use that party's intellectual 19 * property rights. 20 * 21 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a 22 * copy of the source code appearing in this file ("Covered Code") an 23 * irrevocable, perpetual, worldwide license under Intel's copyrights in the 24 * base code distributed originally by Intel ("Original Intel Code") to copy, 25 * make derivatives, distribute, use and display any portion of the Covered 26 * Code in any form, with the right to sublicense such rights; and 27 * 28 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent 29 * license (with the right to sublicense), under only those claims of Intel 30 * patents that are infringed by the Original Intel Code, to make, use, sell, 31 * offer to sell, and import the Covered Code and derivative works thereof 32 * solely to the minimum extent necessary to exercise the above copyright 33 * license, and in no event shall the patent license extend to any additions 34 * to or modifications of the Original Intel Code. No other license or right 35 * is granted directly or by implication, estoppel or otherwise; 36 * 37 * The above copyright and patent license is granted only if the following 38 * conditions are met: 39 * 40 * 3. Conditions 41 * 42 * 3.1. Redistribution of Source with Rights to Further Distribute Source. 43 * Redistribution of source code of any substantial portion of the Covered 44 * Code or modification with rights to further distribute source must include 45 * the above Copyright Notice, the above License, this list of Conditions, 46 * and the following Disclaimer and Export Compliance provision. In addition, 47 * Licensee must cause all Covered Code to which Licensee contributes to 48 * contain a file documenting the changes Licensee made to create that Covered 49 * Code and the date of any change. Licensee must include in that file the 50 * documentation of any changes made by any predecessor Licensee. Licensee 51 * must include a prominent statement that the modification is derived, 52 * directly or indirectly, from Original Intel Code. 53 * 54 * 3.2. Redistribution of Source with no Rights to Further Distribute Source. 55 * Redistribution of source code of any substantial portion of the Covered 56 * Code or modification without rights to further distribute source must 57 * include the following Disclaimer and Export Compliance provision in the 58 * documentation and/or other materials provided with distribution. In 59 * addition, Licensee may not authorize further sublicense of source of any 60 * portion of the Covered Code, and must include terms to the effect that the 61 * license from Licensee to its licensee is limited to the intellectual 62 * property embodied in the software Licensee provides to its licensee, and 63 * not to intellectual property embodied in modifications its licensee may 64 * make. 65 * 66 * 3.3. Redistribution of Executable. Redistribution in executable form of any 67 * substantial portion of the Covered Code or modification must reproduce the 68 * above Copyright Notice, and the following Disclaimer and Export Compliance 69 * provision in the documentation and/or other materials provided with the 70 * distribution. 71 * 72 * 3.4. Intel retains all right, title, and interest in and to the Original 73 * Intel Code. 74 * 75 * 3.5. Neither the name Intel nor any other trademark owned or controlled by 76 * Intel shall be used in advertising or otherwise to promote the sale, use or 77 * other dealings in products derived from or relating to the Covered Code 78 * without prior written authorization from Intel. 79 * 80 * 4. Disclaimer and Export Compliance 81 * 82 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED 83 * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE 84 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, 85 * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY 86 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY 87 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A 88 * PARTICULAR PURPOSE. 89 * 90 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES 91 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR 92 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, 93 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY 94 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL 95 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS 96 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY 97 * LIMITED REMEDY. 98 * 99 * 4.3. Licensee shall not export, either directly or indirectly, any of this 100 * software or system incorporating such software without first obtaining any 101 * required license or other approval from the U. S. Department of Commerce or 102 * any other agency or department of the United States Government. In the 103 * event Licensee exports any such software from the United States or 104 * re-exports any such software from a foreign destination, Licensee shall 105 * ensure that the distribution and export/re-export of the software is in 106 * compliance with all laws, regulations, orders, or other restrictions of the 107 * U.S. Export Administration Regulations. Licensee agrees that neither it nor 108 * any of its subsidiaries will export/re-export any technical data, process, 109 * software, or service, directly or indirectly, to any country for which the 110 * United States government or any agency thereof requires an export license, 111 * other governmental approval, or letter of assurance, without first obtaining 112 * such license, approval or letter. 113 * 114 ***************************************************************************** 115 * 116 * Alternatively, you may choose to be licensed under the terms of the 117 * following license: 118 * 119 * Redistribution and use in source and binary forms, with or without 120 * modification, are permitted provided that the following conditions 121 * are met: 122 * 1. Redistributions of source code must retain the above copyright 123 * notice, this list of conditions, and the following disclaimer, 124 * without modification. 125 * 2. Redistributions in binary form must reproduce at minimum a disclaimer 126 * substantially similar to the "NO WARRANTY" disclaimer below 127 * ("Disclaimer") and any redistribution must be conditioned upon 128 * including a substantially similar Disclaimer requirement for further 129 * binary redistribution. 130 * 3. Neither the names of the above-listed copyright holders nor the names 131 * of any contributors may be used to endorse or promote products derived 132 * from this software without specific prior written permission. 133 * 134 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 135 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 136 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 137 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 138 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 139 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 140 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 141 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 142 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 143 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 144 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 145 * 146 * Alternatively, you may choose to be licensed under the terms of the 147 * GNU General Public License ("GPL") version 2 as published by the Free 148 * Software Foundation. 149 * 150 *****************************************************************************/ 151 152/* 153 * Parse the AML and build an operation tree as most interpreters, (such as 154 * Perl) do. Parsing is done by hand rather than with a YACC generated parser 155 * to tightly constrain stack and dynamic memory usage. Parsing is kept 156 * flexible and the code fairly compact by parsing based on a list of AML 157 * opcode templates in AmlOpInfo[]. 158 */ 159 160#include "acpi.h" 161#include "accommon.h" 162#include "acinterp.h" 163#include "acparser.h" 164#include "acdispat.h" 165#include "amlcode.h" 166#include "acconvert.h" 167#include "acnamesp.h" 168 169#define _COMPONENT ACPI_PARSER 170 ACPI_MODULE_NAME ("psloop") 171 172 173/* Local prototypes */ 174 175static ACPI_STATUS 176AcpiPsGetArguments ( 177 ACPI_WALK_STATE *WalkState, 178 UINT8 *AmlOpStart, 179 ACPI_PARSE_OBJECT *Op); 180 181 182/******************************************************************************* 183 * 184 * FUNCTION: AcpiPsGetArguments 185 * 186 * PARAMETERS: WalkState - Current state 187 * AmlOpStart - Op start in AML 188 * Op - Current Op 189 * 190 * RETURN: Status 191 * 192 * DESCRIPTION: Get arguments for passed Op. 193 * 194 ******************************************************************************/ 195 196static ACPI_STATUS 197AcpiPsGetArguments ( 198 ACPI_WALK_STATE *WalkState, 199 UINT8 *AmlOpStart, 200 ACPI_PARSE_OBJECT *Op) 201{ 202 ACPI_STATUS Status = AE_OK; 203 ACPI_PARSE_OBJECT *Arg = NULL; 204 205 206 ACPI_FUNCTION_TRACE_PTR (PsGetArguments, WalkState); 207 208 209 ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, 210 "Get arguments for opcode [%s]\n", Op->Common.AmlOpName)); 211 212 switch (Op->Common.AmlOpcode) 213 { 214 case AML_BYTE_OP: /* AML_BYTEDATA_ARG */ 215 case AML_WORD_OP: /* AML_WORDDATA_ARG */ 216 case AML_DWORD_OP: /* AML_DWORDATA_ARG */ 217 case AML_QWORD_OP: /* AML_QWORDATA_ARG */ 218 case AML_STRING_OP: /* AML_ASCIICHARLIST_ARG */ 219 220 /* Fill in constant or string argument directly */ 221 222 AcpiPsGetNextSimpleArg (&(WalkState->ParserState), 223 GET_CURRENT_ARG_TYPE (WalkState->ArgTypes), Op); 224 break; 225 226 case AML_INT_NAMEPATH_OP: /* AML_NAMESTRING_ARG */ 227 228 Status = AcpiPsGetNextNamepath (WalkState, 229 &(WalkState->ParserState), Op, ACPI_POSSIBLE_METHOD_CALL); 230 if (ACPI_FAILURE (Status)) 231 { 232 return_ACPI_STATUS (Status); 233 } 234 235 WalkState->ArgTypes = 0; 236 break; 237 238 default: 239 /* 240 * Op is not a constant or string, append each argument to the Op 241 */ 242 while (GET_CURRENT_ARG_TYPE (WalkState->ArgTypes) && 243 !WalkState->ArgCount) 244 { 245 WalkState->Aml = WalkState->ParserState.Aml; 246 247 switch (Op->Common.AmlOpcode) 248 { 249 case AML_METHOD_OP: 250 case AML_BUFFER_OP: 251 case AML_PACKAGE_OP: 252 case AML_VARIABLE_PACKAGE_OP: 253 case AML_WHILE_OP: 254 255 break; 256 257 default: 258 259 ASL_CV_CAPTURE_COMMENTS (WalkState); 260 break; 261 } 262 263 Status = AcpiPsGetNextArg (WalkState, &(WalkState->ParserState), 264 GET_CURRENT_ARG_TYPE (WalkState->ArgTypes), &Arg); 265 if (ACPI_FAILURE (Status)) 266 { 267 return_ACPI_STATUS (Status); 268 } 269 270 if (Arg) 271 { 272 AcpiPsAppendArg (Op, Arg); 273 } 274 275 INCREMENT_ARG_LIST (WalkState->ArgTypes); 276 } 277 278 ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, 279 "Final argument count: %8.8X pass %u\n", 280 WalkState->ArgCount, WalkState->PassNumber)); 281 282 /* Special processing for certain opcodes */ 283 284 switch (Op->Common.AmlOpcode) 285 { 286 case AML_METHOD_OP: 287 /* 288 * Skip parsing of control method because we don't have enough 289 * info in the first pass to parse it correctly. 290 * 291 * Save the length and address of the body 292 */ 293 Op->Named.Data = WalkState->ParserState.Aml; 294 Op->Named.Length = (UINT32) 295 (WalkState->ParserState.PkgEnd - WalkState->ParserState.Aml); 296 297 /* Skip body of method */ 298 299 WalkState->ParserState.Aml = WalkState->ParserState.PkgEnd; 300 WalkState->ArgCount = 0; 301 break; 302 303 case AML_BUFFER_OP: 304 case AML_PACKAGE_OP: 305 case AML_VARIABLE_PACKAGE_OP: 306 307 if ((Op->Common.Parent) && 308 (Op->Common.Parent->Common.AmlOpcode == AML_NAME_OP) && 309 (WalkState->PassNumber <= ACPI_IMODE_LOAD_PASS2)) 310 { 311 ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, 312 "Setup Package/Buffer: Pass %u, AML Ptr: %p\n", 313 WalkState->PassNumber, AmlOpStart)); 314 315 /* 316 * Skip parsing of Buffers and Packages because we don't have 317 * enough info in the first pass to parse them correctly. 318 */ 319 Op->Named.Data = AmlOpStart; 320 Op->Named.Length = (UINT32) 321 (WalkState->ParserState.PkgEnd - AmlOpStart); 322 323 /* Skip body */ 324 325 WalkState->ParserState.Aml = WalkState->ParserState.PkgEnd; 326 WalkState->ArgCount = 0; 327 } 328 break; 329 330 case AML_WHILE_OP: 331 332 if (WalkState->ControlState) 333 { 334 WalkState->ControlState->Control.PackageEnd = 335 WalkState->ParserState.PkgEnd; 336 } 337 break; 338 339 default: 340 341 /* No action for all other opcodes */ 342 343 break; 344 } 345 346 break; 347 } 348 349 return_ACPI_STATUS (AE_OK); 350} 351 352 353/******************************************************************************* 354 * 355 * FUNCTION: AcpiPsParseLoop 356 * 357 * PARAMETERS: WalkState - Current state 358 * 359 * RETURN: Status 360 * 361 * DESCRIPTION: Parse AML (pointed to by the current parser state) and return 362 * a tree of ops. 363 * 364 ******************************************************************************/ 365 366ACPI_STATUS 367AcpiPsParseLoop ( 368 ACPI_WALK_STATE *WalkState) 369{ 370 ACPI_STATUS Status = AE_OK; 371 ACPI_PARSE_OBJECT *Op = NULL; /* current op */ 372 ACPI_PARSE_STATE *ParserState; 373 UINT8 *AmlOpStart = NULL; 374 UINT8 OpcodeLength; 375 376 377 ACPI_FUNCTION_TRACE_PTR (PsParseLoop, WalkState); 378 379 380 if (WalkState->DescendingCallback == NULL) 381 { 382 return_ACPI_STATUS (AE_BAD_PARAMETER); 383 } 384 385 ParserState = &WalkState->ParserState; 386 WalkState->ArgTypes = 0; 387 388#ifndef ACPI_CONSTANT_EVAL_ONLY 389 390 if (WalkState->WalkType & ACPI_WALK_METHOD_RESTART) 391 { 392 /* We are restarting a preempted control method */ 393 394 if (AcpiPsHasCompletedScope (ParserState)) 395 { 396 /* 397 * We must check if a predicate to an IF or WHILE statement 398 * was just completed 399 */ 400 if ((ParserState->Scope->ParseScope.Op) && 401 ((ParserState->Scope->ParseScope.Op->Common.AmlOpcode == AML_IF_OP) || 402 (ParserState->Scope->ParseScope.Op->Common.AmlOpcode == AML_WHILE_OP)) && 403 (WalkState->ControlState) && 404 (WalkState->ControlState->Common.State == 405 ACPI_CONTROL_PREDICATE_EXECUTING)) 406 { 407 /* 408 * A predicate was just completed, get the value of the 409 * predicate and branch based on that value 410 */ 411 WalkState->Op = NULL; 412 Status = AcpiDsGetPredicateValue (WalkState, ACPI_TO_POINTER (TRUE)); 413 if (ACPI_FAILURE (Status) && !ACPI_CNTL_EXCEPTION (Status)) 414 { 415 if (Status == AE_AML_NO_RETURN_VALUE) 416 { 417 ACPI_EXCEPTION ((AE_INFO, Status, 418 "Invoked method did not return a value")); 419 } 420 421 ACPI_EXCEPTION ((AE_INFO, Status, "GetPredicate Failed")); 422 return_ACPI_STATUS (Status); 423 } 424 425 Status = AcpiPsNextParseState (WalkState, Op, Status); 426 } 427 428 AcpiPsPopScope (ParserState, &Op, 429 &WalkState->ArgTypes, &WalkState->ArgCount); 430 ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, "Popped scope, Op=%p\n", Op)); 431 } 432 else if (WalkState->PrevOp) 433 { 434 /* We were in the middle of an op */ 435 436 Op = WalkState->PrevOp; 437 WalkState->ArgTypes = WalkState->PrevArgTypes; 438 } 439 } 440#endif 441 442 /* Iterative parsing loop, while there is more AML to process: */ 443 444 while ((ParserState->Aml < ParserState->AmlEnd) || (Op)) 445 { 446 ASL_CV_CAPTURE_COMMENTS (WalkState); 447 448 AmlOpStart = ParserState->Aml; 449 if (!Op) 450 { 451 Status = AcpiPsCreateOp (WalkState, AmlOpStart, &Op); 452 if (ACPI_FAILURE (Status)) 453 { 454 /* 455 * ACPI_PARSE_MODULE_LEVEL means that we are loading a table by 456 * executing it as a control method. However, if we encounter 457 * an error while loading the table, we need to keep trying to 458 * load the table rather than aborting the table load. Set the 459 * status to AE_OK to proceed with the table load. 460 */ 461 if ((WalkState->ParseFlags & ACPI_PARSE_MODULE_LEVEL) && 462 ((Status == AE_ALREADY_EXISTS) || (Status == AE_NOT_FOUND))) 463 { 464 Status = AE_OK; 465 } 466 if (Status == AE_CTRL_PARSE_CONTINUE) 467 { 468 continue; 469 } 470 471 if (Status == AE_CTRL_PARSE_PENDING) 472 { 473 Status = AE_OK; 474 } 475 476 if (Status == AE_CTRL_TERMINATE) 477 { 478 return_ACPI_STATUS (Status); 479 } 480 481 Status = AcpiPsCompleteOp (WalkState, &Op, Status); 482 if (ACPI_FAILURE (Status)) 483 { 484 return_ACPI_STATUS (Status); 485 } 486 if (AcpiNsOpensScope ( 487 AcpiPsGetOpcodeInfo (WalkState->Opcode)->ObjectType)) 488 { 489 /* 490 * If the scope/device op fails to parse, skip the body of 491 * the scope op because the parse failure indicates that 492 * the device may not exist. 493 */ 494 ACPI_INFO (("Skipping parse of AML opcode: %s (0x%4.4X)", 495 AcpiPsGetOpcodeName (WalkState->Opcode), WalkState->Opcode)); 496 497 /* 498 * Determine the opcode length before skipping the opcode. 499 * An opcode can be 1 byte or 2 bytes in length. 500 */ 501 OpcodeLength = 1; 502 if ((WalkState->Opcode & 0xFF00) == AML_EXTENDED_OPCODE) 503 { 504 OpcodeLength = 2; 505 } 506 WalkState->ParserState.Aml = WalkState->Aml + OpcodeLength; 507 508 WalkState->ParserState.Aml = 509 AcpiPsGetNextPackageEnd(&WalkState->ParserState); 510 WalkState->Aml = WalkState->ParserState.Aml; 511 } 512 513 continue; 514 } 515 516 AcpiExStartTraceOpcode (Op, WalkState); 517 } 518 519 /* 520 * Start ArgCount at zero because we don't know if there are 521 * any args yet 522 */ 523 WalkState->ArgCount = 0; 524 525 switch (Op->Common.AmlOpcode) 526 { 527 case AML_BYTE_OP: 528 case AML_WORD_OP: 529 case AML_DWORD_OP: 530 case AML_QWORD_OP: 531 532 break; 533 534 default: 535 536 ASL_CV_CAPTURE_COMMENTS (WalkState); 537 break; 538 } 539 540 /* Are there any arguments that must be processed? */ 541 542 if (WalkState->ArgTypes) 543 { 544 /* Get arguments */ 545 546 Status = AcpiPsGetArguments (WalkState, AmlOpStart, Op); 547 if (ACPI_FAILURE (Status)) 548 { 549 Status = AcpiPsCompleteOp (WalkState, &Op, Status); 550 if (ACPI_FAILURE (Status)) 551 { 552 return_ACPI_STATUS (Status); 553 } 554 if ((WalkState->ControlState) && 555 ((WalkState->ControlState->Control.Opcode == AML_IF_OP) || 556 (WalkState->ControlState->Control.Opcode == AML_WHILE_OP))) 557 { 558 /* 559 * If the if/while op fails to parse, we will skip parsing 560 * the body of the op. 561 */ 562 ParserState->Aml = 563 WalkState->ControlState->Control.AmlPredicateStart + 1; 564 ParserState->Aml = 565 AcpiPsGetNextPackageEnd (ParserState); 566 WalkState->Aml = ParserState->Aml; 567 568 ACPI_ERROR ((AE_INFO, "Skipping While/If block")); 569 if (*WalkState->Aml == AML_ELSE_OP) 570 { 571 ACPI_ERROR ((AE_INFO, "Skipping Else block")); 572 WalkState->ParserState.Aml = WalkState->Aml + 1; 573 WalkState->ParserState.Aml = 574 AcpiPsGetNextPackageEnd (ParserState); 575 WalkState->Aml = ParserState->Aml; 576 } 577 ACPI_FREE(AcpiUtPopGenericState (&WalkState->ControlState)); 578 } 579 Op = NULL; 580 continue; 581 } 582 } 583 584 /* Check for arguments that need to be processed */ 585 586 ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, 587 "Parseloop: argument count: %8.8X\n", WalkState->ArgCount)); 588 589 if (WalkState->ArgCount) 590 { 591 /* 592 * There are arguments (complex ones), push Op and 593 * prepare for argument 594 */ 595 Status = AcpiPsPushScope (ParserState, Op, 596 WalkState->ArgTypes, WalkState->ArgCount); 597 if (ACPI_FAILURE (Status)) 598 { 599 Status = AcpiPsCompleteOp (WalkState, &Op, Status); 600 if (ACPI_FAILURE (Status)) 601 { 602 return_ACPI_STATUS (Status); 603 } 604 605 continue; 606 } 607 608 Op = NULL; 609 continue; 610 } 611 612 /* 613 * All arguments have been processed -- Op is complete, 614 * prepare for next 615 */ 616 WalkState->OpInfo = AcpiPsGetOpcodeInfo (Op->Common.AmlOpcode); 617 if (WalkState->OpInfo->Flags & AML_NAMED) 618 { 619 if (Op->Common.AmlOpcode == AML_REGION_OP || 620 Op->Common.AmlOpcode == AML_DATA_REGION_OP) 621 { 622 /* 623 * Skip parsing of control method or opregion body, 624 * because we don't have enough info in the first pass 625 * to parse them correctly. 626 * 627 * Completed parsing an OpRegion declaration, we now 628 * know the length. 629 */ 630 Op->Named.Length = (UINT32) (ParserState->Aml - Op->Named.Data); 631 } 632 } 633 634 if (WalkState->OpInfo->Flags & AML_CREATE) 635 { 636 /* 637 * Backup to beginning of CreateXXXfield declaration (1 for 638 * Opcode) 639 * 640 * BodyLength is unknown until we parse the body 641 */ 642 Op->Named.Length = (UINT32) (ParserState->Aml - Op->Named.Data); 643 } 644 645 if (Op->Common.AmlOpcode == AML_BANK_FIELD_OP) 646 { 647 /* 648 * Backup to beginning of BankField declaration 649 * 650 * BodyLength is unknown until we parse the body 651 */ 652 Op->Named.Length = (UINT32) (ParserState->Aml - Op->Named.Data); 653 } 654 655 /* This op complete, notify the dispatcher */ 656 657 if (WalkState->AscendingCallback != NULL) 658 { 659 WalkState->Op = Op; 660 WalkState->Opcode = Op->Common.AmlOpcode; 661 662 Status = WalkState->AscendingCallback (WalkState); 663 Status = AcpiPsNextParseState (WalkState, Op, Status); 664 if (Status == AE_CTRL_PENDING) 665 { 666 Status = AE_OK; 667 } 668 else if ((WalkState->ParseFlags & ACPI_PARSE_MODULE_LEVEL) && 669 (ACPI_AML_EXCEPTION(Status) || Status == AE_ALREADY_EXISTS || 670 Status == AE_NOT_FOUND)) 671 { 672 /* 673 * ACPI_PARSE_MODULE_LEVEL flag means that we are currently 674 * loading a table by executing it as a control method. 675 * However, if we encounter an error while loading the table, 676 * we need to keep trying to load the table rather than 677 * aborting the table load (setting the status to AE_OK 678 * continues the table load). If we get a failure at this 679 * point, it means that the dispatcher got an error while 680 * trying to execute the Op. 681 */ 682 Status = AE_OK; 683 } 684 } 685 686 Status = AcpiPsCompleteOp (WalkState, &Op, Status); 687 if (ACPI_FAILURE (Status)) 688 { 689 return_ACPI_STATUS (Status); 690 } 691 692 } /* while ParserState->Aml */ 693 694 Status = AcpiPsCompleteFinalOp (WalkState, Op, Status); 695 return_ACPI_STATUS (Status); 696} 697