sys/contrib/dev/acpica/components/parser/psobject.c

   1 /******************************************************************************
   2  *
   3  * Module Name: psobject - Support for parse objects
   4  *
   5  *****************************************************************************/
   6
   7 /*
   8  * Copyright (C) 2000 - 2015, 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 <contrib/dev/acpica/include/acpi.h>
  45 #include <contrib/dev/acpica/include/accommon.h>
  46 #include <contrib/dev/acpica/include/acparser.h>
  47 #include <contrib/dev/acpica/include/amlcode.h>
  48
  49 #define _COMPONENT          ACPI_PARSER
  50         ACPI_MODULE_NAME    ("psobject")
  51
  52
  53 /* Local prototypes */
  54
  55 static ACPI_STATUS
  56 AcpiPsGetAmlOpcode (
  57     ACPI_WALK_STATE         *WalkState);
  58
  59
  60 /*******************************************************************************
  61  *
  62  * FUNCTION:    AcpiPsGetAmlOpcode
  63  *
  64  * PARAMETERS:  WalkState           - Current state
  65  *
  66  * RETURN:      Status
  67  *
  68  * DESCRIPTION: Extract the next AML opcode from the input stream.
  69  *
  70  ******************************************************************************/
  71
  72 static ACPI_STATUS
  73 AcpiPsGetAmlOpcode (
  74     ACPI_WALK_STATE         *WalkState)
  75 {
  76
  77     ACPI_FUNCTION_TRACE_PTR (PsGetAmlOpcode, WalkState);
  78
  79
  80     WalkState->AmlOffset = (UINT32) ACPI_PTR_DIFF (WalkState->ParserState.Aml,
  81                                 WalkState->ParserState.AmlStart);
  82     WalkState->Opcode = AcpiPsPeekOpcode (&(WalkState->ParserState));
  83
  84     /*
  85      * First cut to determine what we have found:
  86      * 1) A valid AML opcode
  87      * 2) A name string
  88      * 3) An unknown/invalid opcode
  89      */
  90     WalkState->OpInfo = AcpiPsGetOpcodeInfo (WalkState->Opcode);
  91
  92     switch (WalkState->OpInfo->Class)
  93     {
  94     case AML_CLASS_ASCII:
  95     case AML_CLASS_PREFIX:
  96         /*
  97          * Starts with a valid prefix or ASCII char, this is a name
  98          * string. Convert the bare name string to a namepath.
  99          */
 100         WalkState->Opcode = AML_INT_NAMEPATH_OP;
 101         WalkState->ArgTypes = ARGP_NAMESTRING;
 102         break;
 103
 104     case AML_CLASS_UNKNOWN:
 105
 106         /* The opcode is unrecognized. Complain and skip unknown opcodes */
 107
 108         if (WalkState->PassNumber == 2)
 109         {
 110             ACPI_ERROR ((AE_INFO,
 111                 "Unknown opcode 0x%.2X at table offset 0x%.4X, ignoring",
 112                 WalkState->Opcode,
 113                 (UINT32) (WalkState->AmlOffset + sizeof (ACPI_TABLE_HEADER))));
 114
 115             ACPI_DUMP_BUFFER ((WalkState->ParserState.Aml - 16), 48);
 116
 117 #ifdef ACPI_ASL_COMPILER
 118             /*
 119              * This is executed for the disassembler only. Output goes
 120              * to the disassembled ASL output file.
 121              */
 122             AcpiOsPrintf (
 123                 "/*\nError: Unknown opcode 0x%.2X at table offset 0x%.4X, context:\n",
 124                 WalkState->Opcode,
 125                 (UINT32) (WalkState->AmlOffset + sizeof (ACPI_TABLE_HEADER)));
 126
 127             /* Dump the context surrounding the invalid opcode */
 128
 129             AcpiUtDumpBuffer (((UINT8 *) WalkState->ParserState.Aml - 16),
 130                 48, DB_BYTE_DISPLAY,
 131                 (WalkState->AmlOffset + sizeof (ACPI_TABLE_HEADER) - 16));
 132             AcpiOsPrintf (" */\n");
 133 #endif
 134         }
 135
 136         /* Increment past one-byte or two-byte opcode */
 137
 138         WalkState->ParserState.Aml++;
 139         if (WalkState->Opcode > 0xFF) /* Can only happen if first byte is 0x5B */
 140         {
 141             WalkState->ParserState.Aml++;
 142         }
 143
 144         return_ACPI_STATUS (AE_CTRL_PARSE_CONTINUE);
 145
 146     default:
 147
 148         /* Found opcode info, this is a normal opcode */
 149
 150         WalkState->ParserState.Aml += AcpiPsGetOpcodeSize (WalkState->Opcode);
 151         WalkState->ArgTypes = WalkState->OpInfo->ParseArgs;
 152         break;
 153     }
 154
 155     return_ACPI_STATUS (AE_OK);
 156 }
 157
 158
 159 /*******************************************************************************
 160  *
 161  * FUNCTION:    AcpiPsBuildNamedOp
 162  *
 163  * PARAMETERS:  WalkState           - Current state
 164  *              AmlOpStart          - Begin of named Op in AML
 165  *              UnnamedOp           - Early Op (not a named Op)
 166  *              Op                  - Returned Op
 167  *
 168  * RETURN:      Status
 169  *
 170  * DESCRIPTION: Parse a named Op
 171  *
 172  ******************************************************************************/
 173
 174 ACPI_STATUS
 175 AcpiPsBuildNamedOp (
 176     ACPI_WALK_STATE         *WalkState,
 177     UINT8                   *AmlOpStart,
 178     ACPI_PARSE_OBJECT       *UnnamedOp,
 179     ACPI_PARSE_OBJECT       **Op)
 180 {
 181     ACPI_STATUS             Status = AE_OK;
 182     ACPI_PARSE_OBJECT       *Arg = NULL;
 183
 184
 185     ACPI_FUNCTION_TRACE_PTR (PsBuildNamedOp, WalkState);
 186
 187
 188     UnnamedOp->Common.Value.Arg = NULL;
 189     UnnamedOp->Common.ArgListLength = 0;
 190     UnnamedOp->Common.AmlOpcode = WalkState->Opcode;
 191
 192     /*
 193      * Get and append arguments until we find the node that contains
 194      * the name (the type ARGP_NAME).
 195      */
 196     while (GET_CURRENT_ARG_TYPE (WalkState->ArgTypes) &&
 197           (GET_CURRENT_ARG_TYPE (WalkState->ArgTypes) != ARGP_NAME))
 198     {
 199         Status = AcpiPsGetNextArg (WalkState, &(WalkState->ParserState),
 200                     GET_CURRENT_ARG_TYPE (WalkState->ArgTypes), &Arg);
 201         if (ACPI_FAILURE (Status))
 202         {
 203             return_ACPI_STATUS (Status);
 204         }
 205
 206         AcpiPsAppendArg (UnnamedOp, Arg);
 207         INCREMENT_ARG_LIST (WalkState->ArgTypes);
 208     }
 209
 210     /*
 211      * Make sure that we found a NAME and didn't run out of arguments
 212      */
 213     if (!GET_CURRENT_ARG_TYPE (WalkState->ArgTypes))
 214     {
 215         return_ACPI_STATUS (AE_AML_NO_OPERAND);
 216     }
 217
 218     /* We know that this arg is a name, move to next arg */
 219
 220     INCREMENT_ARG_LIST (WalkState->ArgTypes);
 221
 222     /*
 223      * Find the object. This will either insert the object into
 224      * the namespace or simply look it up
 225      */
 226     WalkState->Op = NULL;
 227
 228     Status = WalkState->DescendingCallback (WalkState, Op);
 229     if (ACPI_FAILURE (Status))
 230     {
 231         if (Status != AE_CTRL_TERMINATE)
 232         {
 233             ACPI_EXCEPTION ((AE_INFO, Status, "During name lookup/catalog"));
 234         }
 235         return_ACPI_STATUS (Status);
 236     }
 237
 238     if (!*Op)
 239     {
 240         return_ACPI_STATUS (AE_CTRL_PARSE_CONTINUE);
 241     }
 242
 243     Status = AcpiPsNextParseState (WalkState, *Op, Status);
 244     if (ACPI_FAILURE (Status))
 245     {
 246         if (Status == AE_CTRL_PENDING)
 247         {
 248             Status = AE_CTRL_PARSE_PENDING;
 249         }
 250         return_ACPI_STATUS (Status);
 251     }
 252
 253     AcpiPsAppendArg (*Op, UnnamedOp->Common.Value.Arg);
 254
 255     if ((*Op)->Common.AmlOpcode == AML_REGION_OP ||
 256         (*Op)->Common.AmlOpcode == AML_DATA_REGION_OP)
 257     {
 258         /*
 259          * Defer final parsing of an OperationRegion body, because we don't
 260          * have enough info in the first pass to parse it correctly (i.e.,
 261          * there may be method calls within the TermArg elements of the body.)
 262          *
 263          * However, we must continue parsing because the opregion is not a
 264          * standalone package -- we don't know where the end is at this point.
 265          *
 266          * (Length is unknown until parse of the body complete)
 267          */
 268         (*Op)->Named.Data = AmlOpStart;
 269         (*Op)->Named.Length = 0;
 270     }
 271
 272     return_ACPI_STATUS (AE_OK);
 273 }
 274
 275
 276 /*******************************************************************************
 277  *
 278  * FUNCTION:    AcpiPsCreateOp
 279  *
 280  * PARAMETERS:  WalkState           - Current state
 281  *              AmlOpStart          - Op start in AML
 282  *              NewOp               - Returned Op
 283  *
 284  * RETURN:      Status
 285  *
 286  * DESCRIPTION: Get Op from AML
 287  *
 288  ******************************************************************************/
 289
 290 ACPI_STATUS
 291 AcpiPsCreateOp (
 292     ACPI_WALK_STATE         *WalkState,
 293     UINT8                   *AmlOpStart,
 294     ACPI_PARSE_OBJECT       **NewOp)
 295 {
 296     ACPI_STATUS             Status = AE_OK;
 297     ACPI_PARSE_OBJECT       *Op;
 298     ACPI_PARSE_OBJECT       *NamedOp = NULL;
 299     ACPI_PARSE_OBJECT       *ParentScope;
 300     UINT8                   ArgumentCount;
 301     const ACPI_OPCODE_INFO  *OpInfo;
 302
 303
 304     ACPI_FUNCTION_TRACE_PTR (PsCreateOp, WalkState);
 305
 306
 307     Status = AcpiPsGetAmlOpcode (WalkState);
 308     if (Status == AE_CTRL_PARSE_CONTINUE)
 309     {
 310         return_ACPI_STATUS (AE_CTRL_PARSE_CONTINUE);
 311     }
 312
 313     /* Create Op structure and append to parent's argument list */
 314
 315     WalkState->OpInfo = AcpiPsGetOpcodeInfo (WalkState->Opcode);
 316     Op = AcpiPsAllocOp (WalkState->Opcode);
 317     if (!Op)
 318     {
 319         return_ACPI_STATUS (AE_NO_MEMORY);
 320     }
 321
 322     if (WalkState->OpInfo->Flags & AML_NAMED)
 323     {
 324         Status = AcpiPsBuildNamedOp (WalkState, AmlOpStart, Op, &NamedOp);
 325         AcpiPsFreeOp (Op);
 326         if (ACPI_FAILURE (Status))
 327         {
 328             return_ACPI_STATUS (Status);
 329         }
 330
 331         *NewOp = NamedOp;
 332         return_ACPI_STATUS (AE_OK);
 333     }
 334
 335     /* Not a named opcode, just allocate Op and append to parent */
 336
 337     if (WalkState->OpInfo->Flags & AML_CREATE)
 338     {
 339         /*
 340          * Backup to beginning of CreateXXXfield declaration
 341          * BodyLength is unknown until we parse the body
 342          */
 343         Op->Named.Data = AmlOpStart;
 344         Op->Named.Length = 0;
 345     }
 346
 347     if (WalkState->Opcode == AML_BANK_FIELD_OP)
 348     {
 349         /*
 350          * Backup to beginning of BankField declaration
 351          * BodyLength is unknown until we parse the body
 352          */
 353         Op->Named.Data = AmlOpStart;
 354         Op->Named.Length = 0;
 355     }
 356
 357     ParentScope = AcpiPsGetParentScope (&(WalkState->ParserState));
 358     AcpiPsAppendArg (ParentScope, Op);
 359
 360     if (ParentScope)
 361     {
 362         OpInfo = AcpiPsGetOpcodeInfo (ParentScope->Common.AmlOpcode);
 363         if (OpInfo->Flags & AML_HAS_TARGET)
 364         {
 365             ArgumentCount = AcpiPsGetArgumentCount (OpInfo->Type);
 366             if (ParentScope->Common.ArgListLength > ArgumentCount)
 367             {
 368                 Op->Common.Flags |= ACPI_PARSEOP_TARGET;
 369             }
 370         }
 371         else if (ParentScope->Common.AmlOpcode == AML_INCREMENT_OP)
 372         {
 373             Op->Common.Flags |= ACPI_PARSEOP_TARGET;
 374         }
 375     }
 376
 377     if (WalkState->DescendingCallback != NULL)
 378     {
 379         /*
 380          * Find the object. This will either insert the object into
 381          * the namespace or simply look it up
 382          */
 383         WalkState->Op = *NewOp = Op;
 384
 385         Status = WalkState->DescendingCallback (WalkState, &Op);
 386         Status = AcpiPsNextParseState (WalkState, Op, Status);
 387         if (Status == AE_CTRL_PENDING)
 388         {
 389             Status = AE_CTRL_PARSE_PENDING;
 390         }
 391     }
 392
 393     return_ACPI_STATUS (Status);
 394 }
 395
 396
 397 /*******************************************************************************
 398  *
 399  * FUNCTION:    AcpiPsCompleteOp
 400  *
 401  * PARAMETERS:  WalkState           - Current state
 402  *              Op                  - Returned Op
 403  *              Status              - Parse status before complete Op
 404  *
 405  * RETURN:      Status
 406  *
 407  * DESCRIPTION: Complete Op
 408  *
 409  ******************************************************************************/
 410
 411 ACPI_STATUS
 412 AcpiPsCompleteOp (
 413     ACPI_WALK_STATE         *WalkState,
 414     ACPI_PARSE_OBJECT       **Op,
 415     ACPI_STATUS             Status)
 416 {
 417     ACPI_STATUS             Status2;
 418
 419
 420     ACPI_FUNCTION_TRACE_PTR (PsCompleteOp, WalkState);
 421
 422
 423     /*
 424      * Finished one argument of the containing scope
 425      */
 426     WalkState->ParserState.Scope->ParseScope.ArgCount--;
 427
 428     /* Close this Op (will result in parse subtree deletion) */
 429
 430     Status2 = AcpiPsCompleteThisOp (WalkState, *Op);
 431     if (ACPI_FAILURE (Status2))
 432     {
 433         return_ACPI_STATUS (Status2);
 434     }
 435
 436     *Op = NULL;
 437
 438     switch (Status)
 439     {
 440     case AE_OK:
 441
 442         break;
 443
 444     case AE_CTRL_TRANSFER:
 445
 446         /* We are about to transfer to a called method */
 447
 448         WalkState->PrevOp = NULL;
 449         WalkState->PrevArgTypes = WalkState->ArgTypes;
 450         return_ACPI_STATUS (Status);
 451
 452     case AE_CTRL_END:
 453
 454         AcpiPsPopScope (&(WalkState->ParserState), Op,
 455             &WalkState->ArgTypes, &WalkState->ArgCount);
 456
 457         if (*Op)
 458         {
 459             WalkState->Op = *Op;
 460             WalkState->OpInfo = AcpiPsGetOpcodeInfo ((*Op)->Common.AmlOpcode);
 461             WalkState->Opcode = (*Op)->Common.AmlOpcode;
 462
 463             Status = WalkState->AscendingCallback (WalkState);
 464             Status = AcpiPsNextParseState (WalkState, *Op, Status);
 465
 466             Status2 = AcpiPsCompleteThisOp (WalkState, *Op);
 467             if (ACPI_FAILURE (Status2))
 468             {
 469                 return_ACPI_STATUS (Status2);
 470             }
 471         }
 472
 473         Status = AE_OK;
 474         break;
 475
 476     case AE_CTRL_BREAK:
 477     case AE_CTRL_CONTINUE:
 478
 479         /* Pop off scopes until we find the While */
 480
 481         while (!(*Op) || ((*Op)->Common.AmlOpcode != AML_WHILE_OP))
 482         {
 483             AcpiPsPopScope (&(WalkState->ParserState), Op,
 484                 &WalkState->ArgTypes, &WalkState->ArgCount);
 485         }
 486
 487         /* Close this iteration of the While loop */
 488
 489         WalkState->Op = *Op;
 490         WalkState->OpInfo = AcpiPsGetOpcodeInfo ((*Op)->Common.AmlOpcode);
 491         WalkState->Opcode = (*Op)->Common.AmlOpcode;
 492
 493         Status = WalkState->AscendingCallback (WalkState);
 494         Status = AcpiPsNextParseState (WalkState, *Op, Status);
 495
 496         Status2 = AcpiPsCompleteThisOp (WalkState, *Op);
 497         if (ACPI_FAILURE (Status2))
 498         {
 499             return_ACPI_STATUS (Status2);
 500         }
 501
 502         Status = AE_OK;
 503         break;
 504
 505     case AE_CTRL_TERMINATE:
 506
 507         /* Clean up */
 508         do
 509         {
 510             if (*Op)
 511             {
 512                 Status2 = AcpiPsCompleteThisOp (WalkState, *Op);
 513                 if (ACPI_FAILURE (Status2))
 514                 {
 515                     return_ACPI_STATUS (Status2);
 516                 }
 517
 518                 AcpiUtDeleteGenericState (
 519                     AcpiUtPopGenericState (&WalkState->ControlState));
 520             }
 521
 522             AcpiPsPopScope (&(WalkState->ParserState), Op,
 523                 &WalkState->ArgTypes, &WalkState->ArgCount);
 524
 525         } while (*Op);
 526
 527         return_ACPI_STATUS (AE_OK);
 528
 529     default:  /* All other non-AE_OK status */
 530
 531         do
 532         {
 533             if (*Op)
 534             {
 535                 Status2 = AcpiPsCompleteThisOp (WalkState, *Op);
 536                 if (ACPI_FAILURE (Status2))
 537                 {
 538                     return_ACPI_STATUS (Status2);
 539                 }
 540             }
 541
 542             AcpiPsPopScope (&(WalkState->ParserState), Op,
 543                 &WalkState->ArgTypes, &WalkState->ArgCount);
 544
 545         } while (*Op);
 546
 547
 548 #if 0
 549         /*
 550          * TBD: Cleanup parse ops on error
 551          */
 552         if (*Op == NULL)
 553         {
 554             AcpiPsPopScope (ParserState, Op,
 555                 &WalkState->ArgTypes, &WalkState->ArgCount);
 556         }
 557 #endif
 558         WalkState->PrevOp = NULL;
 559         WalkState->PrevArgTypes = WalkState->ArgTypes;
 560         return_ACPI_STATUS (Status);
 561     }
 562
 563     /* This scope complete? */
 564
 565     if (AcpiPsHasCompletedScope (&(WalkState->ParserState)))
 566     {
 567         AcpiPsPopScope (&(WalkState->ParserState), Op,
 568             &WalkState->ArgTypes, &WalkState->ArgCount);
 569         ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, "Popped scope, Op=%p\n", *Op));
 570     }
 571     else
 572     {
 573         *Op = NULL;
 574     }
 575
 576     return_ACPI_STATUS (AE_OK);
 577 }
 578
 579
 580 /*******************************************************************************
 581  *
 582  * FUNCTION:    AcpiPsCompleteFinalOp
 583  *
 584  * PARAMETERS:  WalkState           - Current state
 585  *              Op                  - Current Op
 586  *              Status              - Current parse status before complete last
 587  *                                    Op
 588  *
 589  * RETURN:      Status
 590  *
 591  * DESCRIPTION: Complete last Op.
 592  *
 593  ******************************************************************************/
 594
 595 ACPI_STATUS
 596 AcpiPsCompleteFinalOp (
 597     ACPI_WALK_STATE         *WalkState,
 598     ACPI_PARSE_OBJECT       *Op,
 599     ACPI_STATUS             Status)
 600 {
 601     ACPI_STATUS             Status2;
 602
 603
 604     ACPI_FUNCTION_TRACE_PTR (PsCompleteFinalOp, WalkState);
 605
 606
 607     /*
 608      * Complete the last Op (if not completed), and clear the scope stack.
 609      * It is easily possible to end an AML "package" with an unbounded number
 610      * of open scopes (such as when several ASL blocks are closed with
 611      * sequential closing braces). We want to terminate each one cleanly.
 612      */
 613     ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, "AML package complete at Op %p\n", Op));
 614     do
 615     {
 616         if (Op)
 617         {
 618             if (WalkState->AscendingCallback != NULL)
 619             {
 620                 WalkState->Op = Op;
 621                 WalkState->OpInfo = AcpiPsGetOpcodeInfo (Op->Common.AmlOpcode);
 622                 WalkState->Opcode = Op->Common.AmlOpcode;
 623
 624                 Status = WalkState->AscendingCallback (WalkState);
 625                 Status = AcpiPsNextParseState (WalkState, Op, Status);
 626                 if (Status == AE_CTRL_PENDING)
 627                 {
 628                     Status = AcpiPsCompleteOp (WalkState, &Op, AE_OK);
 629                     if (ACPI_FAILURE (Status))
 630                     {
 631                         return_ACPI_STATUS (Status);
 632                     }
 633                 }
 634
 635                 if (Status == AE_CTRL_TERMINATE)
 636                 {
 637                     Status = AE_OK;
 638
 639                     /* Clean up */
 640                     do
 641                     {
 642                         if (Op)
 643                         {
 644                             Status2 = AcpiPsCompleteThisOp (WalkState, Op);
 645                             if (ACPI_FAILURE (Status2))
 646                             {
 647                                 return_ACPI_STATUS (Status2);
 648                             }
 649                         }
 650
 651                         AcpiPsPopScope (&(WalkState->ParserState), &Op,
 652                             &WalkState->ArgTypes, &WalkState->ArgCount);
 653
 654                     } while (Op);
 655
 656                     return_ACPI_STATUS (Status);
 657                 }
 658
 659                 else if (ACPI_FAILURE (Status))
 660                 {
 661                     /* First error is most important */
 662
 663                     (void) AcpiPsCompleteThisOp (WalkState, Op);
 664                     return_ACPI_STATUS (Status);
 665                 }
 666             }
 667
 668             Status2 = AcpiPsCompleteThisOp (WalkState, Op);
 669             if (ACPI_FAILURE (Status2))
 670             {
 671                 return_ACPI_STATUS (Status2);
 672             }
 673         }
 674
 675         AcpiPsPopScope (&(WalkState->ParserState), &Op, &WalkState->ArgTypes,
 676             &WalkState->ArgCount);
 677
 678     } while (Op);
 679
 680     return_ACPI_STATUS (Status);
 681 }