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 - 2014, 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 *****************************************************************************/ 115 116 117 /* 118 * Parse the AML and build an operation tree as most interpreters, (such as 119 * Perl) do. Parsing is done by hand rather than with a YACC generated parser 120 * to tightly constrain stack and dynamic memory usage. Parsing is kept 121 * flexible and the code fairly compact by parsing based on a list of AML 122 * opcode templates in AmlOpInfo[]. 123 */ 124 125 #include "acpi.h" 126 #include "accommon.h" 127 #include "acparser.h" 128 #include "acdispat.h" 129 #include "amlcode.h" 130 131 #define _COMPONENT ACPI_PARSER 132 ACPI_MODULE_NAME ("psloop") 133 134 135 /* Local prototypes */ 136 137 static ACPI_STATUS 138 AcpiPsGetArguments ( 139 ACPI_WALK_STATE *WalkState, 140 UINT8 *AmlOpStart, 141 ACPI_PARSE_OBJECT *Op); 142 143 static void 144 AcpiPsLinkModuleCode ( 145 ACPI_PARSE_OBJECT *ParentOp, 146 UINT8 *AmlStart, 147 UINT32 AmlLength, 148 ACPI_OWNER_ID OwnerId); 149 150 151 /******************************************************************************* 152 * 153 * FUNCTION: AcpiPsGetArguments 154 * 155 * PARAMETERS: WalkState - Current state 156 * AmlOpStart - Op start in AML 157 * Op - Current Op 158 * 159 * RETURN: Status 160 * 161 * DESCRIPTION: Get arguments for passed Op. 162 * 163 ******************************************************************************/ 164 165 static ACPI_STATUS 166 AcpiPsGetArguments ( 167 ACPI_WALK_STATE *WalkState, 168 UINT8 *AmlOpStart, 169 ACPI_PARSE_OBJECT *Op) 170 { 171 ACPI_STATUS Status = AE_OK; 172 ACPI_PARSE_OBJECT *Arg = NULL; 173 const ACPI_OPCODE_INFO *OpInfo; 174 175 176 ACPI_FUNCTION_TRACE_PTR (PsGetArguments, WalkState); 177 178 179 switch (Op->Common.AmlOpcode) 180 { 181 case AML_BYTE_OP: /* AML_BYTEDATA_ARG */ 182 case AML_WORD_OP: /* AML_WORDDATA_ARG */ 183 case AML_DWORD_OP: /* AML_DWORDATA_ARG */ 184 case AML_QWORD_OP: /* AML_QWORDATA_ARG */ 185 case AML_STRING_OP: /* AML_ASCIICHARLIST_ARG */ 186 187 /* Fill in constant or string argument directly */ 188 189 AcpiPsGetNextSimpleArg (&(WalkState->ParserState), 190 GET_CURRENT_ARG_TYPE (WalkState->ArgTypes), Op); 191 break; 192 193 case AML_INT_NAMEPATH_OP: /* AML_NAMESTRING_ARG */ 194 195 Status = AcpiPsGetNextNamepath (WalkState, &(WalkState->ParserState), Op, 1); 196 if (ACPI_FAILURE (Status)) 197 { 198 return_ACPI_STATUS (Status); 199 } 200 201 WalkState->ArgTypes = 0; 202 break; 203 204 default: 205 /* 206 * Op is not a constant or string, append each argument to the Op 207 */ 208 while (GET_CURRENT_ARG_TYPE (WalkState->ArgTypes) && !WalkState->ArgCount) 209 { 210 WalkState->AmlOffset = (UINT32) ACPI_PTR_DIFF (WalkState->ParserState.Aml, 211 WalkState->ParserState.AmlStart); 212 213 Status = AcpiPsGetNextArg (WalkState, &(WalkState->ParserState), 214 GET_CURRENT_ARG_TYPE (WalkState->ArgTypes), &Arg); 215 if (ACPI_FAILURE (Status)) 216 { 217 return_ACPI_STATUS (Status); 218 } 219 220 if (Arg) 221 { 222 Arg->Common.AmlOffset = WalkState->AmlOffset; 223 AcpiPsAppendArg (Op, Arg); 224 } 225 226 INCREMENT_ARG_LIST (WalkState->ArgTypes); 227 } 228 229 230 /* 231 * Handle executable code at "module-level". This refers to 232 * executable opcodes that appear outside of any control method. 233 */ 234 if ((WalkState->PassNumber <= ACPI_IMODE_LOAD_PASS2) && 235 ((WalkState->ParseFlags & ACPI_PARSE_DISASSEMBLE) == 0)) 236 { 237 /* 238 * We want to skip If/Else/While constructs during Pass1 because we 239 * want to actually conditionally execute the code during Pass2. 240 * 241 * Except for disassembly, where we always want to walk the 242 * If/Else/While packages 243 */ 244 switch (Op->Common.AmlOpcode) 245 { 246 case AML_IF_OP: 247 case AML_ELSE_OP: 248 case AML_WHILE_OP: 249 /* 250 * Currently supported module-level opcodes are: 251 * IF/ELSE/WHILE. These appear to be the most common, 252 * and easiest to support since they open an AML 253 * package. 254 */ 255 if (WalkState->PassNumber == ACPI_IMODE_LOAD_PASS1) 256 { 257 AcpiPsLinkModuleCode (Op->Common.Parent, AmlOpStart, 258 (UINT32) (WalkState->ParserState.PkgEnd - AmlOpStart), 259 WalkState->OwnerId); 260 } 261 262 ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, 263 "Pass1: Skipping an If/Else/While body\n")); 264 265 /* Skip body of if/else/while in pass 1 */ 266 267 WalkState->ParserState.Aml = WalkState->ParserState.PkgEnd; 268 WalkState->ArgCount = 0; 269 break; 270 271 default: 272 /* 273 * Check for an unsupported executable opcode at module 274 * level. We must be in PASS1, the parent must be a SCOPE, 275 * The opcode class must be EXECUTE, and the opcode must 276 * not be an argument to another opcode. 277 */ 278 if ((WalkState->PassNumber == ACPI_IMODE_LOAD_PASS1) && 279 (Op->Common.Parent->Common.AmlOpcode == AML_SCOPE_OP)) 280 { 281 OpInfo = AcpiPsGetOpcodeInfo (Op->Common.AmlOpcode); 282 if ((OpInfo->Class == AML_CLASS_EXECUTE) && 283 (!Arg)) 284 { 285 ACPI_WARNING ((AE_INFO, 286 "Unsupported module-level executable opcode " 287 "0x%.2X at table offset 0x%.4X", 288 Op->Common.AmlOpcode, 289 (UINT32) (ACPI_PTR_DIFF (AmlOpStart, 290 WalkState->ParserState.AmlStart) + 291 sizeof (ACPI_TABLE_HEADER)))); 292 } 293 } 294 break; 295 } 296 } 297 298 /* Special processing for certain opcodes */ 299 300 switch (Op->Common.AmlOpcode) 301 { 302 case AML_METHOD_OP: 303 /* 304 * Skip parsing of control method because we don't have enough 305 * info in the first pass to parse it correctly. 306 * 307 * Save the length and address of the body 308 */ 309 Op->Named.Data = WalkState->ParserState.Aml; 310 Op->Named.Length = (UINT32) 311 (WalkState->ParserState.PkgEnd - WalkState->ParserState.Aml); 312 313 /* Skip body of method */ 314 315 WalkState->ParserState.Aml = WalkState->ParserState.PkgEnd; 316 WalkState->ArgCount = 0; 317 break; 318 319 case AML_BUFFER_OP: 320 case AML_PACKAGE_OP: 321 case AML_VAR_PACKAGE_OP: 322 323 if ((Op->Common.Parent) && 324 (Op->Common.Parent->Common.AmlOpcode == AML_NAME_OP) && 325 (WalkState->PassNumber <= ACPI_IMODE_LOAD_PASS2)) 326 { 327 /* 328 * Skip parsing of Buffers and Packages because we don't have 329 * enough info in the first pass to parse them correctly. 330 */ 331 Op->Named.Data = AmlOpStart; 332 Op->Named.Length = (UINT32) 333 (WalkState->ParserState.PkgEnd - AmlOpStart); 334 335 /* Skip body */ 336 337 WalkState->ParserState.Aml = WalkState->ParserState.PkgEnd; 338 WalkState->ArgCount = 0; 339 } 340 break; 341 342 case AML_WHILE_OP: 343 344 if (WalkState->ControlState) 345 { 346 WalkState->ControlState->Control.PackageEnd = 347 WalkState->ParserState.PkgEnd; 348 } 349 break; 350 351 default: 352 353 /* No action for all other opcodes */ 354 355 break; 356 } 357 358 break; 359 } 360 361 return_ACPI_STATUS (AE_OK); 362 } 363 364 365 /******************************************************************************* 366 * 367 * FUNCTION: AcpiPsLinkModuleCode 368 * 369 * PARAMETERS: ParentOp - Parent parser op 370 * AmlStart - Pointer to the AML 371 * AmlLength - Length of executable AML 372 * OwnerId - OwnerId of module level code 373 * 374 * RETURN: None. 375 * 376 * DESCRIPTION: Wrap the module-level code with a method object and link the 377 * object to the global list. Note, the mutex field of the method 378 * object is used to link multiple module-level code objects. 379 * 380 ******************************************************************************/ 381 382 static void 383 AcpiPsLinkModuleCode ( 384 ACPI_PARSE_OBJECT *ParentOp, 385 UINT8 *AmlStart, 386 UINT32 AmlLength, 387 ACPI_OWNER_ID OwnerId) 388 { 389 ACPI_OPERAND_OBJECT *Prev; 390 ACPI_OPERAND_OBJECT *Next; 391 ACPI_OPERAND_OBJECT *MethodObj; 392 ACPI_NAMESPACE_NODE *ParentNode; 393 394 395 /* Get the tail of the list */ 396 397 Prev = Next = AcpiGbl_ModuleCodeList; 398 while (Next) 399 { 400 Prev = Next; 401 Next = Next->Method.Mutex; 402 } 403 404 /* 405 * Insert the module level code into the list. Merge it if it is 406 * adjacent to the previous element. 407 */ 408 if (!Prev || 409 ((Prev->Method.AmlStart + Prev->Method.AmlLength) != AmlStart)) 410 { 411 /* Create, initialize, and link a new temporary method object */ 412 413 MethodObj = AcpiUtCreateInternalObject (ACPI_TYPE_METHOD); 414 if (!MethodObj) 415 { 416 return; 417 } 418 419 if (ParentOp->Common.Node) 420 { 421 ParentNode = ParentOp->Common.Node; 422 } 423 else 424 { 425 ParentNode = AcpiGbl_RootNode; 426 } 427 428 MethodObj->Method.AmlStart = AmlStart; 429 MethodObj->Method.AmlLength = AmlLength; 430 MethodObj->Method.OwnerId = OwnerId; 431 MethodObj->Method.InfoFlags |= ACPI_METHOD_MODULE_LEVEL; 432 433 /* 434 * Save the parent node in NextObject. This is cheating, but we 435 * don't want to expand the method object. 436 */ 437 MethodObj->Method.NextObject = 438 ACPI_CAST_PTR (ACPI_OPERAND_OBJECT, ParentNode); 439 440 if (!Prev) 441 { 442 AcpiGbl_ModuleCodeList = MethodObj; 443 } 444 else 445 { 446 Prev->Method.Mutex = MethodObj; 447 } 448 } 449 else 450 { 451 Prev->Method.AmlLength += AmlLength; 452 } 453 } 454 455 /******************************************************************************* 456 * 457 * FUNCTION: AcpiPsParseLoop 458 * 459 * PARAMETERS: WalkState - Current state 460 * 461 * RETURN: Status 462 * 463 * DESCRIPTION: Parse AML (pointed to by the current parser state) and return 464 * a tree of ops. 465 * 466 ******************************************************************************/ 467 468 ACPI_STATUS 469 AcpiPsParseLoop ( 470 ACPI_WALK_STATE *WalkState) 471 { 472 ACPI_STATUS Status = AE_OK; 473 ACPI_PARSE_OBJECT *Op = NULL; /* current op */ 474 ACPI_PARSE_STATE *ParserState; 475 UINT8 *AmlOpStart = NULL; 476 477 478 ACPI_FUNCTION_TRACE_PTR (PsParseLoop, WalkState); 479 480 481 if (WalkState->DescendingCallback == NULL) 482 { 483 return_ACPI_STATUS (AE_BAD_PARAMETER); 484 } 485 486 ParserState = &WalkState->ParserState; 487 WalkState->ArgTypes = 0; 488 489 #if (!defined (ACPI_NO_METHOD_EXECUTION) && !defined (ACPI_CONSTANT_EVAL_ONLY)) 490 491 if (WalkState->WalkType & ACPI_WALK_METHOD_RESTART) 492 { 493 /* We are restarting a preempted control method */ 494 495 if (AcpiPsHasCompletedScope (ParserState)) 496 { 497 /* 498 * We must check if a predicate to an IF or WHILE statement 499 * was just completed 500 */ 501 if ((ParserState->Scope->ParseScope.Op) && 502 ((ParserState->Scope->ParseScope.Op->Common.AmlOpcode == AML_IF_OP) || 503 (ParserState->Scope->ParseScope.Op->Common.AmlOpcode == AML_WHILE_OP)) && 504 (WalkState->ControlState) && 505 (WalkState->ControlState->Common.State == 506 ACPI_CONTROL_PREDICATE_EXECUTING)) 507 { 508 /* 509 * A predicate was just completed, get the value of the 510 * predicate and branch based on that value 511 */ 512 WalkState->Op = NULL; 513 Status = AcpiDsGetPredicateValue (WalkState, ACPI_TO_POINTER (TRUE)); 514 if (ACPI_FAILURE (Status) && 515 ((Status & AE_CODE_MASK) != AE_CODE_CONTROL)) 516 { 517 if (Status == AE_AML_NO_RETURN_VALUE) 518 { 519 ACPI_EXCEPTION ((AE_INFO, Status, 520 "Invoked method did not return a value")); 521 } 522 523 ACPI_EXCEPTION ((AE_INFO, Status, "GetPredicate Failed")); 524 return_ACPI_STATUS (Status); 525 } 526 527 Status = AcpiPsNextParseState (WalkState, Op, Status); 528 } 529 530 AcpiPsPopScope (ParserState, &Op, 531 &WalkState->ArgTypes, &WalkState->ArgCount); 532 ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, "Popped scope, Op=%p\n", Op)); 533 } 534 else if (WalkState->PrevOp) 535 { 536 /* We were in the middle of an op */ 537 538 Op = WalkState->PrevOp; 539 WalkState->ArgTypes = WalkState->PrevArgTypes; 540 } 541 } 542 #endif 543 544 /* Iterative parsing loop, while there is more AML to process: */ 545 546 while ((ParserState->Aml < ParserState->AmlEnd) || (Op)) 547 { 548 AmlOpStart = ParserState->Aml; 549 if (!Op) 550 { 551 Status = AcpiPsCreateOp (WalkState, AmlOpStart, &Op); 552 if (ACPI_FAILURE (Status)) 553 { 554 if (Status == AE_CTRL_PARSE_CONTINUE) 555 { 556 continue; 557 } 558 559 if (Status == AE_CTRL_PARSE_PENDING) 560 { 561 Status = AE_OK; 562 } 563 564 if (Status == AE_CTRL_TERMINATE) 565 { 566 return_ACPI_STATUS (Status); 567 } 568 569 Status = AcpiPsCompleteOp (WalkState, &Op, Status); 570 if (ACPI_FAILURE (Status)) 571 { 572 return_ACPI_STATUS (Status); 573 } 574 575 continue; 576 } 577 578 Op->Common.AmlOffset = WalkState->AmlOffset; 579 580 if (WalkState->OpInfo) 581 { 582 ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, 583 "Opcode %4.4X [%s] Op %p Aml %p AmlOffset %5.5X\n", 584 (UINT32) Op->Common.AmlOpcode, WalkState->OpInfo->Name, 585 Op, ParserState->Aml, Op->Common.AmlOffset)); 586 } 587 } 588 589 590 /* 591 * Start ArgCount at zero because we don't know if there are 592 * any args yet 593 */ 594 WalkState->ArgCount = 0; 595 596 /* Are there any arguments that must be processed? */ 597 598 if (WalkState->ArgTypes) 599 { 600 /* Get arguments */ 601 602 Status = AcpiPsGetArguments (WalkState, AmlOpStart, Op); 603 if (ACPI_FAILURE (Status)) 604 { 605 Status = AcpiPsCompleteOp (WalkState, &Op, Status); 606 if (ACPI_FAILURE (Status)) 607 { 608 return_ACPI_STATUS (Status); 609 } 610 611 continue; 612 } 613 } 614 615 /* Check for arguments that need to be processed */ 616 617 if (WalkState->ArgCount) 618 { 619 /* 620 * There are arguments (complex ones), push Op and 621 * prepare for argument 622 */ 623 Status = AcpiPsPushScope (ParserState, Op, 624 WalkState->ArgTypes, WalkState->ArgCount); 625 if (ACPI_FAILURE (Status)) 626 { 627 Status = AcpiPsCompleteOp (WalkState, &Op, Status); 628 if (ACPI_FAILURE (Status)) 629 { 630 return_ACPI_STATUS (Status); 631 } 632 633 continue; 634 } 635 636 Op = NULL; 637 continue; 638 } 639 640 /* 641 * All arguments have been processed -- Op is complete, 642 * prepare for next 643 */ 644 WalkState->OpInfo = AcpiPsGetOpcodeInfo (Op->Common.AmlOpcode); 645 if (WalkState->OpInfo->Flags & AML_NAMED) 646 { 647 if (Op->Common.AmlOpcode == AML_REGION_OP || 648 Op->Common.AmlOpcode == AML_DATA_REGION_OP) 649 { 650 /* 651 * Skip parsing of control method or opregion body, 652 * because we don't have enough info in the first pass 653 * to parse them correctly. 654 * 655 * Completed parsing an OpRegion declaration, we now 656 * know the length. 657 */ 658 Op->Named.Length = (UINT32) (ParserState->Aml - Op->Named.Data); 659 } 660 } 661 662 if (WalkState->OpInfo->Flags & AML_CREATE) 663 { 664 /* 665 * Backup to beginning of CreateXXXfield declaration (1 for 666 * Opcode) 667 * 668 * BodyLength is unknown until we parse the body 669 */ 670 Op->Named.Length = (UINT32) (ParserState->Aml - Op->Named.Data); 671 } 672 673 if (Op->Common.AmlOpcode == AML_BANK_FIELD_OP) 674 { 675 /* 676 * Backup to beginning of BankField declaration 677 * 678 * BodyLength is unknown until we parse the body 679 */ 680 Op->Named.Length = (UINT32) (ParserState->Aml - Op->Named.Data); 681 } 682 683 /* This op complete, notify the dispatcher */ 684 685 if (WalkState->AscendingCallback != NULL) 686 { 687 WalkState->Op = Op; 688 WalkState->Opcode = Op->Common.AmlOpcode; 689 690 Status = WalkState->AscendingCallback (WalkState); 691 Status = AcpiPsNextParseState (WalkState, Op, Status); 692 if (Status == AE_CTRL_PENDING) 693 { 694 Status = AE_OK; 695 } 696 } 697 698 Status = AcpiPsCompleteOp (WalkState, &Op, Status); 699 if (ACPI_FAILURE (Status)) 700 { 701 return_ACPI_STATUS (Status); 702 } 703 704 } /* while ParserState->Aml */ 705 706 Status = AcpiPsCompleteFinalOp (WalkState, Op, Status); 707 return_ACPI_STATUS (Status); 708 } 709