usr/src/common/acpica/dispatcher/dswexec.c

   1 /******************************************************************************
   2  *
   3  * Module Name: dswexec - Dispatcher method execution callbacks;
   4  *                        dispatch to interpreter.
   5  *
   6  *****************************************************************************/
   7
   8 /*
   9  * Copyright (C) 2000 - 2016, Intel Corp.
  10  * All rights reserved.
  11  *
  12  * Redistribution and use in source and binary forms, with or without
  13  * modification, are permitted provided that the following conditions
  14  * are met:
  15  * 1. Redistributions of source code must retain the above copyright
  16  *    notice, this list of conditions, and the following disclaimer,
  17  *    without modification.
  18  * 2. Redistributions in binary form must reproduce at minimum a disclaimer
  19  *    substantially similar to the "NO WARRANTY" disclaimer below
  20  *    ("Disclaimer") and any redistribution must be conditioned upon
  21  *    including a substantially similar Disclaimer requirement for further
  22  *    binary redistribution.
  23  * 3. Neither the names of the above-listed copyright holders nor the names
  24  *    of any contributors may be used to endorse or promote products derived
  25  *    from this software without specific prior written permission.
  26  *
  27  * Alternatively, this software may be distributed under the terms of the
  28  * GNU General Public License ("GPL") version 2 as published by the Free
  29  * Software Foundation.
  30  *
  31  * NO WARRANTY
  32  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  33  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  34  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
  35  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  36  * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  37  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  38  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  39  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  40  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
  41  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  42  * POSSIBILITY OF SUCH DAMAGES.
  43  */
  44
  45 #include "acpi.h"
  46 #include "accommon.h"
  47 #include "acparser.h"
  48 #include "amlcode.h"
  49 #include "acdispat.h"
  50 #include "acinterp.h"
  51 #include "acnamesp.h"
  52 #include "acdebug.h"
  53
  54
  55 #define _COMPONENT          ACPI_DISPATCHER
  56         ACPI_MODULE_NAME    ("dswexec")
  57
  58 /*
  59  * Dispatch table for opcode classes
  60  */
  61 static ACPI_EXECUTE_OP      AcpiGbl_OpTypeDispatch [] =
  62 {
  63     AcpiExOpcode_0A_0T_1R,
  64     AcpiExOpcode_1A_0T_0R,
  65     AcpiExOpcode_1A_0T_1R,
  66     AcpiExOpcode_1A_1T_0R,
  67     AcpiExOpcode_1A_1T_1R,
  68     AcpiExOpcode_2A_0T_0R,
  69     AcpiExOpcode_2A_0T_1R,
  70     AcpiExOpcode_2A_1T_1R,
  71     AcpiExOpcode_2A_2T_1R,
  72     AcpiExOpcode_3A_0T_0R,
  73     AcpiExOpcode_3A_1T_1R,
  74     AcpiExOpcode_6A_0T_1R
  75 };
  76
  77
  78 /*****************************************************************************
  79  *
  80  * FUNCTION:    AcpiDsGetPredicateValue
  81  *
  82  * PARAMETERS:  WalkState       - Current state of the parse tree walk
  83  *              ResultObj       - if non-zero, pop result from result stack
  84  *
  85  * RETURN:      Status
  86  *
  87  * DESCRIPTION: Get the result of a predicate evaluation
  88  *
  89  ****************************************************************************/
  90
  91 ACPI_STATUS
  92 AcpiDsGetPredicateValue (
  93     ACPI_WALK_STATE         *WalkState,
  94     ACPI_OPERAND_OBJECT     *ResultObj)
  95 {
  96     ACPI_STATUS             Status = AE_OK;
  97     ACPI_OPERAND_OBJECT     *ObjDesc;
  98     ACPI_OPERAND_OBJECT     *LocalObjDesc = NULL;
  99
 100
 101     ACPI_FUNCTION_TRACE_PTR (DsGetPredicateValue, WalkState);
 102
 103
 104     WalkState->ControlState->Common.State = 0;
 105
 106     if (ResultObj)
 107     {
 108         Status = AcpiDsResultPop (&ObjDesc, WalkState);
 109         if (ACPI_FAILURE (Status))
 110         {
 111             ACPI_EXCEPTION ((AE_INFO, Status,
 112                 "Could not get result from predicate evaluation"));
 113
 114             return_ACPI_STATUS (Status);
 115         }
 116     }
 117     else
 118     {
 119         Status = AcpiDsCreateOperand (WalkState, WalkState->Op, 0);
 120         if (ACPI_FAILURE (Status))
 121         {
 122             return_ACPI_STATUS (Status);
 123         }
 124
 125         Status = AcpiExResolveToValue (&WalkState->Operands [0], WalkState);
 126         if (ACPI_FAILURE (Status))
 127         {
 128             return_ACPI_STATUS (Status);
 129         }
 130
 131         ObjDesc = WalkState->Operands [0];
 132     }
 133
 134     if (!ObjDesc)
 135     {
 136         ACPI_ERROR ((AE_INFO,
 137             "No predicate ObjDesc=%p State=%p",
 138             ObjDesc, WalkState));
 139
 140         return_ACPI_STATUS (AE_AML_NO_OPERAND);
 141     }
 142
 143     /*
 144      * Result of predicate evaluation must be an Integer
 145      * object. Implicitly convert the argument if necessary.
 146      */
 147     Status = AcpiExConvertToInteger (ObjDesc, &LocalObjDesc, 16);
 148     if (ACPI_FAILURE (Status))
 149     {
 150         goto Cleanup;
 151     }
 152
 153     if (LocalObjDesc->Common.Type != ACPI_TYPE_INTEGER)
 154     {
 155         ACPI_ERROR ((AE_INFO,
 156             "Bad predicate (not an integer) ObjDesc=%p State=%p Type=0x%X",
 157             ObjDesc, WalkState, ObjDesc->Common.Type));
 158
 159         Status = AE_AML_OPERAND_TYPE;
 160         goto Cleanup;
 161     }
 162
 163     /* Truncate the predicate to 32-bits if necessary */
 164
 165     (void) AcpiExTruncateFor32bitTable (LocalObjDesc);
 166
 167     /*
 168      * Save the result of the predicate evaluation on
 169      * the control stack
 170      */
 171     if (LocalObjDesc->Integer.Value)
 172     {
 173         WalkState->ControlState->Common.Value = TRUE;
 174     }
 175     else
 176     {
 177         /*
 178          * Predicate is FALSE, we will just toss the
 179          * rest of the package
 180          */
 181         WalkState->ControlState->Common.Value = FALSE;
 182         Status = AE_CTRL_FALSE;
 183     }
 184
 185     /* Predicate can be used for an implicit return value */
 186
 187     (void) AcpiDsDoImplicitReturn (LocalObjDesc, WalkState, TRUE);
 188
 189
 190 Cleanup:
 191
 192     ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
 193         "Completed a predicate eval=%X Op=%p\n",
 194         WalkState->ControlState->Common.Value, WalkState->Op));
 195
 196 #ifdef ACPI_DEBUGGER
 197     /* Break to debugger to display result */
 198
 199     AcpiDbDisplayResultObject (LocalObjDesc, WalkState);
 200 #endif
 201
 202     /*
 203      * Delete the predicate result object (we know that
 204      * we don't need it anymore)
 205      */
 206     if (LocalObjDesc != ObjDesc)
 207     {
 208         AcpiUtRemoveReference (LocalObjDesc);
 209     }
 210     AcpiUtRemoveReference (ObjDesc);
 211
 212     WalkState->ControlState->Common.State = ACPI_CONTROL_NORMAL;
 213     return_ACPI_STATUS (Status);
 214 }
 215
 216
 217 /*****************************************************************************
 218  *
 219  * FUNCTION:    AcpiDsExecBeginOp
 220  *
 221  * PARAMETERS:  WalkState       - Current state of the parse tree walk
 222  *              OutOp           - Where to return op if a new one is created
 223  *
 224  * RETURN:      Status
 225  *
 226  * DESCRIPTION: Descending callback used during the execution of control
 227  *              methods. This is where most operators and operands are
 228  *              dispatched to the interpreter.
 229  *
 230  ****************************************************************************/
 231
 232 ACPI_STATUS
 233 AcpiDsExecBeginOp (
 234     ACPI_WALK_STATE         *WalkState,
 235     ACPI_PARSE_OBJECT       **OutOp)
 236 {
 237     ACPI_PARSE_OBJECT       *Op;
 238     ACPI_STATUS             Status = AE_OK;
 239     UINT32                  OpcodeClass;
 240
 241
 242     ACPI_FUNCTION_TRACE_PTR (DsExecBeginOp, WalkState);
 243
 244
 245     Op = WalkState->Op;
 246     if (!Op)
 247     {
 248         Status = AcpiDsLoad2BeginOp (WalkState, OutOp);
 249         if (ACPI_FAILURE (Status))
 250         {
 251             goto ErrorExit;
 252         }
 253
 254         Op = *OutOp;
 255         WalkState->Op = Op;
 256         WalkState->Opcode = Op->Common.AmlOpcode;
 257         WalkState->OpInfo = AcpiPsGetOpcodeInfo (Op->Common.AmlOpcode);
 258
 259         if (AcpiNsOpensScope (WalkState->OpInfo->ObjectType))
 260         {
 261             ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
 262                 "(%s) Popping scope for Op %p\n",
 263                 AcpiUtGetTypeName (WalkState->OpInfo->ObjectType), Op));
 264
 265             Status = AcpiDsScopeStackPop (WalkState);
 266             if (ACPI_FAILURE (Status))
 267             {
 268                 goto ErrorExit;
 269             }
 270         }
 271     }
 272
 273     if (Op == WalkState->Origin)
 274     {
 275         if (OutOp)
 276         {
 277             *OutOp = Op;
 278         }
 279
 280         return_ACPI_STATUS (AE_OK);
 281     }
 282
 283     /*
 284      * If the previous opcode was a conditional, this opcode
 285      * must be the beginning of the associated predicate.
 286      * Save this knowledge in the current scope descriptor
 287      */
 288     if ((WalkState->ControlState) &&
 289         (WalkState->ControlState->Common.State ==
 290             ACPI_CONTROL_CONDITIONAL_EXECUTING))
 291     {
 292         ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
 293             "Exec predicate Op=%p State=%p\n",
 294             Op, WalkState));
 295
 296         WalkState->ControlState->Common.State =
 297             ACPI_CONTROL_PREDICATE_EXECUTING;
 298
 299         /* Save start of predicate */
 300
 301         WalkState->ControlState->Control.PredicateOp = Op;
 302     }
 303
 304
 305     OpcodeClass = WalkState->OpInfo->Class;
 306
 307     /* We want to send namepaths to the load code */
 308
 309     if (Op->Common.AmlOpcode == AML_INT_NAMEPATH_OP)
 310     {
 311         OpcodeClass = AML_CLASS_NAMED_OBJECT;
 312     }
 313
 314     /*
 315      * Handle the opcode based upon the opcode type
 316      */
 317     switch (OpcodeClass)
 318     {
 319     case AML_CLASS_CONTROL:
 320
 321         Status = AcpiDsExecBeginControlOp (WalkState, Op);
 322         break;
 323
 324     case AML_CLASS_NAMED_OBJECT:
 325
 326         if (WalkState->WalkType & ACPI_WALK_METHOD)
 327         {
 328             /*
 329              * Found a named object declaration during method execution;
 330              * we must enter this object into the namespace. The created
 331              * object is temporary and will be deleted upon completion of
 332              * the execution of this method.
 333              *
 334              * Note 10/2010: Except for the Scope() op. This opcode does
 335              * not actually create a new object, it refers to an existing
 336              * object. However, for Scope(), we want to indeed open a
 337              * new scope.
 338              */
 339             if (Op->Common.AmlOpcode != AML_SCOPE_OP)
 340             {
 341                 Status = AcpiDsLoad2BeginOp (WalkState, NULL);
 342             }
 343             else
 344             {
 345                 Status = AcpiDsScopeStackPush (
 346                     Op->Named.Node, Op->Named.Node->Type, WalkState);
 347                 if (ACPI_FAILURE (Status))
 348                 {
 349                     return_ACPI_STATUS (Status);
 350                 }
 351             }
 352         }
 353         break;
 354
 355     case AML_CLASS_EXECUTE:
 356     case AML_CLASS_CREATE:
 357
 358         break;
 359
 360     default:
 361
 362         break;
 363     }
 364
 365     /* Nothing to do here during method execution */
 366
 367     return_ACPI_STATUS (Status);
 368
 369
 370 ErrorExit:
 371     Status = AcpiDsMethodError (Status, WalkState);
 372     return_ACPI_STATUS (Status);
 373 }
 374
 375
 376 /*****************************************************************************
 377  *
 378  * FUNCTION:    AcpiDsExecEndOp
 379  *
 380  * PARAMETERS:  WalkState       - Current state of the parse tree walk
 381  *
 382  * RETURN:      Status
 383  *
 384  * DESCRIPTION: Ascending callback used during the execution of control
 385  *              methods. The only thing we really need to do here is to
 386  *              notice the beginning of IF, ELSE, and WHILE blocks.
 387  *
 388  ****************************************************************************/
 389
 390 ACPI_STATUS
 391 AcpiDsExecEndOp (
 392     ACPI_WALK_STATE         *WalkState)
 393 {
 394     ACPI_PARSE_OBJECT       *Op;
 395     ACPI_STATUS             Status = AE_OK;
 396     UINT32                  OpType;
 397     UINT32                  OpClass;
 398     ACPI_PARSE_OBJECT       *NextOp;
 399     ACPI_PARSE_OBJECT       *FirstArg;
 400
 401
 402     ACPI_FUNCTION_TRACE_PTR (DsExecEndOp, WalkState);
 403
 404
 405     Op = WalkState->Op;
 406     OpType = WalkState->OpInfo->Type;
 407     OpClass = WalkState->OpInfo->Class;
 408
 409     if (OpClass == AML_CLASS_UNKNOWN)
 410     {
 411         ACPI_ERROR ((AE_INFO, "Unknown opcode 0x%X", Op->Common.AmlOpcode));
 412         return_ACPI_STATUS (AE_NOT_IMPLEMENTED);
 413     }
 414
 415     FirstArg = Op->Common.Value.Arg;
 416
 417     /* Init the walk state */
 418
 419     WalkState->NumOperands = 0;
 420     WalkState->OperandIndex = 0;
 421     WalkState->ReturnDesc = NULL;
 422     WalkState->ResultObj = NULL;
 423
 424 #ifdef ACPI_DEBUGGER
 425     /* Call debugger for single step support (DEBUG build only) */
 426
 427     Status = AcpiDbSingleStep (WalkState, Op, OpClass);
 428     if (ACPI_FAILURE (Status))
 429     {
 430         return_ACPI_STATUS (Status);
 431     }
 432 #endif
 433
 434     /* Decode the Opcode Class */
 435
 436     switch (OpClass)
 437     {
 438     case AML_CLASS_ARGUMENT:    /* Constants, literals, etc. */
 439
 440         if (WalkState->Opcode == AML_INT_NAMEPATH_OP)
 441         {
 442             Status = AcpiDsEvaluateNamePath (WalkState);
 443             if (ACPI_FAILURE (Status))
 444             {
 445                 goto Cleanup;
 446             }
 447         }
 448         break;
 449
 450     case AML_CLASS_EXECUTE:     /* Most operators with arguments */
 451
 452         /* Build resolved operand stack */
 453
 454         Status = AcpiDsCreateOperands (WalkState, FirstArg);
 455         if (ACPI_FAILURE (Status))
 456         {
 457             goto Cleanup;
 458         }
 459
 460         /*
 461          * All opcodes require operand resolution, with the only exceptions
 462          * being the ObjectType and SizeOf operators.
 463          */
 464         if (!(WalkState->OpInfo->Flags & AML_NO_OPERAND_RESOLVE))
 465         {
 466             /* Resolve all operands */
 467
 468             Status = AcpiExResolveOperands (WalkState->Opcode,
 469                 &(WalkState->Operands [WalkState->NumOperands -1]),
 470                 WalkState);
 471         }
 472
 473         if (ACPI_SUCCESS (Status))
 474         {
 475             /*
 476              * Dispatch the request to the appropriate interpreter handler
 477              * routine. There is one routine per opcode "type" based upon the
 478              * number of opcode arguments and return type.
 479              */
 480             Status = AcpiGbl_OpTypeDispatch[OpType] (WalkState);
 481         }
 482         else
 483         {
 484             /*
 485              * Treat constructs of the form "Store(LocalX,LocalX)" as noops when the
 486              * Local is uninitialized.
 487              */
 488             if  ((Status == AE_AML_UNINITIALIZED_LOCAL) &&
 489                 (WalkState->Opcode == AML_STORE_OP) &&
 490                 (WalkState->Operands[0]->Common.Type == ACPI_TYPE_LOCAL_REFERENCE) &&
 491                 (WalkState->Operands[1]->Common.Type == ACPI_TYPE_LOCAL_REFERENCE) &&
 492                 (WalkState->Operands[0]->Reference.Class ==
 493                  WalkState->Operands[1]->Reference.Class) &&
 494                 (WalkState->Operands[0]->Reference.Value ==
 495                  WalkState->Operands[1]->Reference.Value))
 496             {
 497                 Status = AE_OK;
 498             }
 499             else
 500             {
 501                 ACPI_EXCEPTION ((AE_INFO, Status,
 502                     "While resolving operands for [%s]",
 503                     AcpiPsGetOpcodeName (WalkState->Opcode)));
 504             }
 505         }
 506
 507         /* Always delete the argument objects and clear the operand stack */
 508
 509         AcpiDsClearOperands (WalkState);
 510
 511         /*
 512          * If a result object was returned from above, push it on the
 513          * current result stack
 514          */
 515         if (ACPI_SUCCESS (Status) &&
 516             WalkState->ResultObj)
 517         {
 518             Status = AcpiDsResultPush (WalkState->ResultObj, WalkState);
 519         }
 520         break;
 521
 522     default:
 523
 524         switch (OpType)
 525         {
 526         case AML_TYPE_CONTROL:    /* Type 1 opcode, IF/ELSE/WHILE/NOOP */
 527
 528             /* 1 Operand, 0 ExternalResult, 0 InternalResult */
 529
 530             Status = AcpiDsExecEndControlOp (WalkState, Op);
 531
 532             break;
 533
 534         case AML_TYPE_METHOD_CALL:
 535             /*
 536              * If the method is referenced from within a package
 537              * declaration, it is not a invocation of the method, just
 538              * a reference to it.
 539              */
 540             if ((Op->Asl.Parent) &&
 541                ((Op->Asl.Parent->Asl.AmlOpcode == AML_PACKAGE_OP) ||
 542                 (Op->Asl.Parent->Asl.AmlOpcode == AML_VAR_PACKAGE_OP)))
 543             {
 544                 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
 545                     "Method Reference in a Package, Op=%p\n", Op));
 546
 547                 Op->Common.Node = (ACPI_NAMESPACE_NODE *)
 548                     Op->Asl.Value.Arg->Asl.Node;
 549                 AcpiUtAddReference (Op->Asl.Value.Arg->Asl.Node->Object);
 550                 return_ACPI_STATUS (AE_OK);
 551             }
 552
 553             ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
 554                 "Method invocation, Op=%p\n", Op));
 555
 556             /*
 557              * (AML_METHODCALL) Op->Asl.Value.Arg->Asl.Node contains
 558              * the method Node pointer
 559              */
 560             /* NextOp points to the op that holds the method name */
 561
 562             NextOp = FirstArg;
 563
 564             /* NextOp points to first argument op */
 565
 566             NextOp = NextOp->Common.Next;
 567
 568             /*
 569              * Get the method's arguments and put them on the operand stack
 570              */
 571             Status = AcpiDsCreateOperands (WalkState, NextOp);
 572             if (ACPI_FAILURE (Status))
 573             {
 574                 break;
 575             }
 576
 577             /*
 578              * Since the operands will be passed to another control method,
 579              * we must resolve all local references here (Local variables,
 580              * arguments to *this* method, etc.)
 581              */
 582             Status = AcpiDsResolveOperands (WalkState);
 583             if (ACPI_FAILURE (Status))
 584             {
 585                 /* On error, clear all resolved operands */
 586
 587                 AcpiDsClearOperands (WalkState);
 588                 break;
 589             }
 590
 591             /*
 592              * Tell the walk loop to preempt this running method and
 593              * execute the new method
 594              */
 595             Status = AE_CTRL_TRANSFER;
 596
 597             /*
 598              * Return now; we don't want to disturb anything,
 599              * especially the operand count!
 600              */
 601             return_ACPI_STATUS (Status);
 602
 603         case AML_TYPE_CREATE_FIELD:
 604
 605             ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
 606                 "Executing CreateField Buffer/Index Op=%p\n", Op));
 607
 608             Status = AcpiDsLoad2EndOp (WalkState);
 609             if (ACPI_FAILURE (Status))
 610             {
 611                 break;
 612             }
 613
 614             Status = AcpiDsEvalBufferFieldOperands (WalkState, Op);
 615             break;
 616
 617
 618         case AML_TYPE_CREATE_OBJECT:
 619
 620             ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
 621                 "Executing CreateObject (Buffer/Package) Op=%p\n", Op));
 622
 623             switch (Op->Common.Parent->Common.AmlOpcode)
 624             {
 625             case AML_NAME_OP:
 626                 /*
 627                  * Put the Node on the object stack (Contains the ACPI Name
 628                  * of this object)
 629                  */
 630                 WalkState->Operands[0] = (void *)
 631                     Op->Common.Parent->Common.Node;
 632                 WalkState->NumOperands = 1;
 633
 634                 Status = AcpiDsCreateNode (WalkState,
 635                     Op->Common.Parent->Common.Node, Op->Common.Parent);
 636                 if (ACPI_FAILURE (Status))
 637                 {
 638                     break;
 639                 }
 640
 641                 /* Fall through */
 642                 /*lint -fallthrough */
 643
 644             case AML_INT_EVAL_SUBTREE_OP:
 645
 646                 Status = AcpiDsEvalDataObjectOperands (WalkState, Op,
 647                     AcpiNsGetAttachedObject (Op->Common.Parent->Common.Node));
 648                 break;
 649
 650             default:
 651
 652                 Status = AcpiDsEvalDataObjectOperands (WalkState, Op, NULL);
 653                 break;
 654             }
 655
 656             /*
 657              * If a result object was returned from above, push it on the
 658              * current result stack
 659              */
 660             if (WalkState->ResultObj)
 661             {
 662                 Status = AcpiDsResultPush (WalkState->ResultObj, WalkState);
 663             }
 664             break;
 665
 666         case AML_TYPE_NAMED_FIELD:
 667         case AML_TYPE_NAMED_COMPLEX:
 668         case AML_TYPE_NAMED_SIMPLE:
 669         case AML_TYPE_NAMED_NO_OBJ:
 670
 671             Status = AcpiDsLoad2EndOp (WalkState);
 672             if (ACPI_FAILURE (Status))
 673             {
 674                 break;
 675             }
 676
 677             if (Op->Common.AmlOpcode == AML_REGION_OP)
 678             {
 679                 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
 680                     "Executing OpRegion Address/Length Op=%p\n", Op));
 681
 682                 Status = AcpiDsEvalRegionOperands (WalkState, Op);
 683                 if (ACPI_FAILURE (Status))
 684                 {
 685                     break;
 686                 }
 687             }
 688             else if (Op->Common.AmlOpcode == AML_DATA_REGION_OP)
 689             {
 690                 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
 691                     "Executing DataTableRegion Strings Op=%p\n", Op));
 692
 693                 Status = AcpiDsEvalTableRegionOperands (WalkState, Op);
 694                 if (ACPI_FAILURE (Status))
 695                 {
 696                     break;
 697                 }
 698             }
 699             else if (Op->Common.AmlOpcode == AML_BANK_FIELD_OP)
 700             {
 701                 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
 702                     "Executing BankField Op=%p\n", Op));
 703
 704                 Status = AcpiDsEvalBankFieldOperands (WalkState, Op);
 705                 if (ACPI_FAILURE (Status))
 706                 {
 707                     break;
 708                 }
 709             }
 710             break;
 711
 712         case AML_TYPE_UNDEFINED:
 713
 714             ACPI_ERROR ((AE_INFO,
 715                 "Undefined opcode type Op=%p", Op));
 716             return_ACPI_STATUS (AE_NOT_IMPLEMENTED);
 717
 718         case AML_TYPE_BOGUS:
 719
 720             ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
 721                 "Internal opcode=%X type Op=%p\n",
 722                 WalkState->Opcode, Op));
 723             break;
 724
 725         default:
 726
 727             ACPI_ERROR ((AE_INFO,
 728                 "Unimplemented opcode, class=0x%X "
 729                 "type=0x%X Opcode=0x%X Op=%p",
 730                 OpClass, OpType, Op->Common.AmlOpcode, Op));
 731
 732             Status = AE_NOT_IMPLEMENTED;
 733             break;
 734         }
 735     }
 736
 737     /*
 738      * ACPI 2.0 support for 64-bit integers: Truncate numeric
 739      * result value if we are executing from a 32-bit ACPI table
 740      */
 741     (void) AcpiExTruncateFor32bitTable (WalkState->ResultObj);
 742
 743     /*
 744      * Check if we just completed the evaluation of a
 745      * conditional predicate
 746      */
 747     if ((ACPI_SUCCESS (Status)) &&
 748         (WalkState->ControlState) &&
 749         (WalkState->ControlState->Common.State ==
 750             ACPI_CONTROL_PREDICATE_EXECUTING) &&
 751         (WalkState->ControlState->Control.PredicateOp == Op))
 752     {
 753         Status = AcpiDsGetPredicateValue (WalkState, WalkState->ResultObj);
 754         WalkState->ResultObj = NULL;
 755     }
 756
 757
 758 Cleanup:
 759
 760     if (WalkState->ResultObj)
 761     {
 762 #ifdef ACPI_DEBUGGER
 763         /* Break to debugger to display result */
 764
 765         AcpiDbDisplayResultObject (WalkState->ResultObj,WalkState);
 766 #endif
 767
 768         /*
 769          * Delete the result op if and only if:
 770          * Parent will not use the result -- such as any
 771          * non-nested type2 op in a method (parent will be method)
 772          */
 773         AcpiDsDeleteResultIfNotUsed (Op, WalkState->ResultObj, WalkState);
 774     }
 775
 776 #ifdef _UNDER_DEVELOPMENT
 777
 778     if (WalkState->ParserState.Aml == WalkState->ParserState.AmlEnd)
 779     {
 780         AcpiDbMethodEnd (WalkState);
 781     }
 782 #endif
 783
 784     /* Invoke exception handler on error */
 785
 786     if (ACPI_FAILURE (Status))
 787     {
 788         Status = AcpiDsMethodError (Status, WalkState);
 789     }
 790
 791     /* Always clear the object stack */
 792
 793     WalkState->NumOperands = 0;
 794     return_ACPI_STATUS (Status);
 795 }