sys/contrib/dev/acpica/source/components/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 - 2017, 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,
 148         ACPI_STRTOUL_BASE16);
 149     if (ACPI_FAILURE (Status))
 150     {
 151         goto Cleanup;
 152     }
 153
 154     if (LocalObjDesc->Common.Type != ACPI_TYPE_INTEGER)
 155     {
 156         ACPI_ERROR ((AE_INFO,
 157             "Bad predicate (not an integer) ObjDesc=%p State=%p Type=0x%X",
 158             ObjDesc, WalkState, ObjDesc->Common.Type));
 159
 160         Status = AE_AML_OPERAND_TYPE;
 161         goto Cleanup;
 162     }
 163
 164     /* Truncate the predicate to 32-bits if necessary */
 165
 166     (void) AcpiExTruncateFor32bitTable (LocalObjDesc);
 167
 168     /*
 169      * Save the result of the predicate evaluation on
 170      * the control stack
 171      */
 172     if (LocalObjDesc->Integer.Value)
 173     {
 174         WalkState->ControlState->Common.Value = TRUE;
 175     }
 176     else
 177     {
 178         /*
 179          * Predicate is FALSE, we will just toss the
 180          * rest of the package
 181          */
 182         WalkState->ControlState->Common.Value = FALSE;
 183         Status = AE_CTRL_FALSE;
 184     }
 185
 186     /* Predicate can be used for an implicit return value */
 187
 188     (void) AcpiDsDoImplicitReturn (LocalObjDesc, WalkState, TRUE);
 189
 190
 191 Cleanup:
 192
 193     ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
 194         "Completed a predicate eval=%X Op=%p\n",
 195         WalkState->ControlState->Common.Value, WalkState->Op));
 196
 197     /* Break to debugger to display result */
 198
 199     AcpiDbDisplayResultObject (LocalObjDesc, WalkState);
 200
 201     /*
 202      * Delete the predicate result object (we know that
 203      * we don't need it anymore)
 204      */
 205     if (LocalObjDesc != ObjDesc)
 206     {
 207         AcpiUtRemoveReference (LocalObjDesc);
 208     }
 209     AcpiUtRemoveReference (ObjDesc);
 210
 211     WalkState->ControlState->Common.State = ACPI_CONTROL_NORMAL;
 212     return_ACPI_STATUS (Status);
 213 }
 214
 215
 216 /*****************************************************************************
 217  *
 218  * FUNCTION:    AcpiDsExecBeginOp
 219  *
 220  * PARAMETERS:  WalkState       - Current state of the parse tree walk
 221  *              OutOp           - Where to return op if a new one is created
 222  *
 223  * RETURN:      Status
 224  *
 225  * DESCRIPTION: Descending callback used during the execution of control
 226  *              methods. This is where most operators and operands are
 227  *              dispatched to the interpreter.
 228  *
 229  ****************************************************************************/
 230
 231 ACPI_STATUS
 232 AcpiDsExecBeginOp (
 233     ACPI_WALK_STATE         *WalkState,
 234     ACPI_PARSE_OBJECT       **OutOp)
 235 {
 236     ACPI_PARSE_OBJECT       *Op;
 237     ACPI_STATUS             Status = AE_OK;
 238     UINT32                  OpcodeClass;
 239
 240
 241     ACPI_FUNCTION_TRACE_PTR (DsExecBeginOp, WalkState);
 242
 243
 244     Op = WalkState->Op;
 245     if (!Op)
 246     {
 247         Status = AcpiDsLoad2BeginOp (WalkState, OutOp);
 248         if (ACPI_FAILURE (Status))
 249         {
 250             goto ErrorExit;
 251         }
 252
 253         Op = *OutOp;
 254         WalkState->Op = Op;
 255         WalkState->Opcode = Op->Common.AmlOpcode;
 256         WalkState->OpInfo = AcpiPsGetOpcodeInfo (Op->Common.AmlOpcode);
 257
 258         if (AcpiNsOpensScope (WalkState->OpInfo->ObjectType))
 259         {
 260             ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
 261                 "(%s) Popping scope for Op %p\n",
 262                 AcpiUtGetTypeName (WalkState->OpInfo->ObjectType), Op));
 263
 264             Status = AcpiDsScopeStackPop (WalkState);
 265             if (ACPI_FAILURE (Status))
 266             {
 267                 goto ErrorExit;
 268             }
 269         }
 270     }
 271
 272     if (Op == WalkState->Origin)
 273     {
 274         if (OutOp)
 275         {
 276             *OutOp = Op;
 277         }
 278
 279         return_ACPI_STATUS (AE_OK);
 280     }
 281
 282     /*
 283      * If the previous opcode was a conditional, this opcode
 284      * must be the beginning of the associated predicate.
 285      * Save this knowledge in the current scope descriptor
 286      */
 287     if ((WalkState->ControlState) &&
 288         (WalkState->ControlState->Common.State ==
 289             ACPI_CONTROL_CONDITIONAL_EXECUTING))
 290     {
 291         ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
 292             "Exec predicate Op=%p State=%p\n",
 293             Op, WalkState));
 294
 295         WalkState->ControlState->Common.State =
 296             ACPI_CONTROL_PREDICATE_EXECUTING;
 297
 298         /* Save start of predicate */
 299
 300         WalkState->ControlState->Control.PredicateOp = Op;
 301     }
 302
 303
 304     OpcodeClass = WalkState->OpInfo->Class;
 305
 306     /* We want to send namepaths to the load code */
 307
 308     if (Op->Common.AmlOpcode == AML_INT_NAMEPATH_OP)
 309     {
 310         OpcodeClass = AML_CLASS_NAMED_OBJECT;
 311     }
 312
 313     /*
 314      * Handle the opcode based upon the opcode type
 315      */
 316     switch (OpcodeClass)
 317     {
 318     case AML_CLASS_CONTROL:
 319
 320         Status = AcpiDsExecBeginControlOp (WalkState, Op);
 321         break;
 322
 323     case AML_CLASS_NAMED_OBJECT:
 324
 325         if (WalkState->WalkType & ACPI_WALK_METHOD)
 326         {
 327             /*
 328              * Found a named object declaration during method execution;
 329              * we must enter this object into the namespace. The created
 330              * object is temporary and will be deleted upon completion of
 331              * the execution of this method.
 332              *
 333              * Note 10/2010: Except for the Scope() op. This opcode does
 334              * not actually create a new object, it refers to an existing
 335              * object. However, for Scope(), we want to indeed open a
 336              * new scope.
 337              */
 338             if (Op->Common.AmlOpcode != AML_SCOPE_OP)
 339             {
 340                 Status = AcpiDsLoad2BeginOp (WalkState, NULL);
 341             }
 342             else
 343             {
 344                 Status = AcpiDsScopeStackPush (
 345                     Op->Named.Node, Op->Named.Node->Type, WalkState);
 346                 if (ACPI_FAILURE (Status))
 347                 {
 348                     return_ACPI_STATUS (Status);
 349                 }
 350             }
 351         }
 352         break;
 353
 354     case AML_CLASS_EXECUTE:
 355     case AML_CLASS_CREATE:
 356
 357         break;
 358
 359     default:
 360
 361         break;
 362     }
 363
 364     /* Nothing to do here during method execution */
 365
 366     return_ACPI_STATUS (Status);
 367
 368
 369 ErrorExit:
 370     Status = AcpiDsMethodError (Status, WalkState);
 371     return_ACPI_STATUS (Status);
 372 }
 373
 374
 375 /*****************************************************************************
 376  *
 377  * FUNCTION:    AcpiDsExecEndOp
 378  *
 379  * PARAMETERS:  WalkState       - Current state of the parse tree walk
 380  *
 381  * RETURN:      Status
 382  *
 383  * DESCRIPTION: Ascending callback used during the execution of control
 384  *              methods. The only thing we really need to do here is to
 385  *              notice the beginning of IF, ELSE, and WHILE blocks.
 386  *
 387  ****************************************************************************/
 388
 389 ACPI_STATUS
 390 AcpiDsExecEndOp (
 391     ACPI_WALK_STATE         *WalkState)
 392 {
 393     ACPI_PARSE_OBJECT       *Op;
 394     ACPI_STATUS             Status = AE_OK;
 395     UINT32                  OpType;
 396     UINT32                  OpClass;
 397     ACPI_PARSE_OBJECT       *NextOp;
 398     ACPI_PARSE_OBJECT       *FirstArg;
 399
 400
 401     ACPI_FUNCTION_TRACE_PTR (DsExecEndOp, WalkState);
 402
 403
 404     Op = WalkState->Op;
 405     OpType = WalkState->OpInfo->Type;
 406     OpClass = WalkState->OpInfo->Class;
 407
 408     if (OpClass == AML_CLASS_UNKNOWN)
 409     {
 410         ACPI_ERROR ((AE_INFO, "Unknown opcode 0x%X", Op->Common.AmlOpcode));
 411         return_ACPI_STATUS (AE_NOT_IMPLEMENTED);
 412     }
 413
 414     FirstArg = Op->Common.Value.Arg;
 415
 416     /* Init the walk state */
 417
 418     WalkState->NumOperands = 0;
 419     WalkState->OperandIndex = 0;
 420     WalkState->ReturnDesc = NULL;
 421     WalkState->ResultObj = NULL;
 422
 423     /* Call debugger for single step support (DEBUG build only) */
 424
 425     Status = AcpiDbSingleStep (WalkState, Op, OpClass);
 426     if (ACPI_FAILURE (Status))
 427     {
 428         return_ACPI_STATUS (Status);
 429     }
 430
 431     /* Decode the Opcode Class */
 432
 433     switch (OpClass)
 434     {
 435     case AML_CLASS_ARGUMENT:    /* Constants, literals, etc. */
 436
 437         if (WalkState->Opcode == AML_INT_NAMEPATH_OP)
 438         {
 439             Status = AcpiDsEvaluateNamePath (WalkState);
 440             if (ACPI_FAILURE (Status))
 441             {
 442                 goto Cleanup;
 443             }
 444         }
 445         break;
 446
 447     case AML_CLASS_EXECUTE:     /* Most operators with arguments */
 448
 449         /* Build resolved operand stack */
 450
 451         Status = AcpiDsCreateOperands (WalkState, FirstArg);
 452         if (ACPI_FAILURE (Status))
 453         {
 454             goto Cleanup;
 455         }
 456
 457         /*
 458          * All opcodes require operand resolution, with the only exceptions
 459          * being the ObjectType and SizeOf operators.
 460          */
 461         if (!(WalkState->OpInfo->Flags & AML_NO_OPERAND_RESOLVE))
 462         {
 463             /* Resolve all operands */
 464
 465             Status = AcpiExResolveOperands (WalkState->Opcode,
 466                 &(WalkState->Operands [WalkState->NumOperands -1]),
 467                 WalkState);
 468         }
 469
 470         if (ACPI_SUCCESS (Status))
 471         {
 472             /*
 473              * Dispatch the request to the appropriate interpreter handler
 474              * routine. There is one routine per opcode "type" based upon the
 475              * number of opcode arguments and return type.
 476              */
 477             Status = AcpiGbl_OpTypeDispatch[OpType] (WalkState);
 478         }
 479         else
 480         {
 481             /*
 482              * Treat constructs of the form "Store(LocalX,LocalX)" as noops when the
 483              * Local is uninitialized.
 484              */
 485             if  ((Status == AE_AML_UNINITIALIZED_LOCAL) &&
 486                 (WalkState->Opcode == AML_STORE_OP) &&
 487                 (WalkState->Operands[0]->Common.Type == ACPI_TYPE_LOCAL_REFERENCE) &&
 488                 (WalkState->Operands[1]->Common.Type == ACPI_TYPE_LOCAL_REFERENCE) &&
 489                 (WalkState->Operands[0]->Reference.Class ==
 490                  WalkState->Operands[1]->Reference.Class) &&
 491                 (WalkState->Operands[0]->Reference.Value ==
 492                  WalkState->Operands[1]->Reference.Value))
 493             {
 494                 Status = AE_OK;
 495             }
 496             else
 497             {
 498                 ACPI_EXCEPTION ((AE_INFO, Status,
 499                     "While resolving operands for [%s]",
 500                     AcpiPsGetOpcodeName (WalkState->Opcode)));
 501             }
 502         }
 503
 504         /* Always delete the argument objects and clear the operand stack */
 505
 506         AcpiDsClearOperands (WalkState);
 507
 508         /*
 509          * If a result object was returned from above, push it on the
 510          * current result stack
 511          */
 512         if (ACPI_SUCCESS (Status) &&
 513             WalkState->ResultObj)
 514         {
 515             Status = AcpiDsResultPush (WalkState->ResultObj, WalkState);
 516         }
 517         break;
 518
 519     default:
 520
 521         switch (OpType)
 522         {
 523         case AML_TYPE_CONTROL:    /* Type 1 opcode, IF/ELSE/WHILE/NOOP */
 524
 525             /* 1 Operand, 0 ExternalResult, 0 InternalResult */
 526
 527             Status = AcpiDsExecEndControlOp (WalkState, Op);
 528
 529             break;
 530
 531         case AML_TYPE_METHOD_CALL:
 532             /*
 533              * If the method is referenced from within a package
 534              * declaration, it is not a invocation of the method, just
 535              * a reference to it.
 536              */
 537             if ((Op->Asl.Parent) &&
 538                ((Op->Asl.Parent->Asl.AmlOpcode == AML_PACKAGE_OP) ||
 539                 (Op->Asl.Parent->Asl.AmlOpcode == AML_VARIABLE_PACKAGE_OP)))
 540             {
 541                 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
 542                     "Method Reference in a Package, Op=%p\n", Op));
 543
 544                 Op->Common.Node = (ACPI_NAMESPACE_NODE *)
 545                     Op->Asl.Value.Arg->Asl.Node;
 546                 AcpiUtAddReference (Op->Asl.Value.Arg->Asl.Node->Object);
 547                 return_ACPI_STATUS (AE_OK);
 548             }
 549
 550             ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
 551                 "Method invocation, Op=%p\n", Op));
 552
 553             /*
 554              * (AML_METHODCALL) Op->Asl.Value.Arg->Asl.Node contains
 555              * the method Node pointer
 556              */
 557             /* NextOp points to the op that holds the method name */
 558
 559             NextOp = FirstArg;
 560
 561             /* NextOp points to first argument op */
 562
 563             NextOp = NextOp->Common.Next;
 564
 565             /*
 566              * Get the method's arguments and put them on the operand stack
 567              */
 568             Status = AcpiDsCreateOperands (WalkState, NextOp);
 569             if (ACPI_FAILURE (Status))
 570             {
 571                 break;
 572             }
 573
 574             /*
 575              * Since the operands will be passed to another control method,
 576              * we must resolve all local references here (Local variables,
 577              * arguments to *this* method, etc.)
 578              */
 579             Status = AcpiDsResolveOperands (WalkState);
 580             if (ACPI_FAILURE (Status))
 581             {
 582                 /* On error, clear all resolved operands */
 583
 584                 AcpiDsClearOperands (WalkState);
 585                 break;
 586             }
 587
 588             /*
 589              * Tell the walk loop to preempt this running method and
 590              * execute the new method
 591              */
 592             Status = AE_CTRL_TRANSFER;
 593
 594             /*
 595              * Return now; we don't want to disturb anything,
 596              * especially the operand count!
 597              */
 598             return_ACPI_STATUS (Status);
 599
 600         case AML_TYPE_CREATE_FIELD:
 601
 602             ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
 603                 "Executing CreateField Buffer/Index Op=%p\n", Op));
 604
 605             Status = AcpiDsLoad2EndOp (WalkState);
 606             if (ACPI_FAILURE (Status))
 607             {
 608                 break;
 609             }
 610
 611             Status = AcpiDsEvalBufferFieldOperands (WalkState, Op);
 612             break;
 613
 614
 615         case AML_TYPE_CREATE_OBJECT:
 616
 617             ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
 618                 "Executing CreateObject (Buffer/Package) Op=%p\n", Op));
 619
 620             switch (Op->Common.Parent->Common.AmlOpcode)
 621             {
 622             case AML_NAME_OP:
 623                 /*
 624                  * Put the Node on the object stack (Contains the ACPI Name
 625                  * of this object)
 626                  */
 627                 WalkState->Operands[0] = (void *)
 628                     Op->Common.Parent->Common.Node;
 629                 WalkState->NumOperands = 1;
 630
 631                 Status = AcpiDsCreateNode (WalkState,
 632                     Op->Common.Parent->Common.Node, Op->Common.Parent);
 633                 if (ACPI_FAILURE (Status))
 634                 {
 635                     break;
 636                 }
 637
 638                 /* Fall through */
 639                 /*lint -fallthrough */
 640
 641             case AML_INT_EVAL_SUBTREE_OP:
 642
 643                 Status = AcpiDsEvalDataObjectOperands (WalkState, Op,
 644                     AcpiNsGetAttachedObject (Op->Common.Parent->Common.Node));
 645                 break;
 646
 647             default:
 648
 649                 Status = AcpiDsEvalDataObjectOperands (WalkState, Op, NULL);
 650                 break;
 651             }
 652
 653             /*
 654              * If a result object was returned from above, push it on the
 655              * current result stack
 656              */
 657             if (WalkState->ResultObj)
 658             {
 659                 Status = AcpiDsResultPush (WalkState->ResultObj, WalkState);
 660             }
 661             break;
 662
 663         case AML_TYPE_NAMED_FIELD:
 664         case AML_TYPE_NAMED_COMPLEX:
 665         case AML_TYPE_NAMED_SIMPLE:
 666         case AML_TYPE_NAMED_NO_OBJ:
 667
 668             Status = AcpiDsLoad2EndOp (WalkState);
 669             if (ACPI_FAILURE (Status))
 670             {
 671                 break;
 672             }
 673
 674             if (Op->Common.AmlOpcode == AML_REGION_OP)
 675             {
 676                 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
 677                     "Executing OpRegion Address/Length Op=%p\n", Op));
 678
 679                 Status = AcpiDsEvalRegionOperands (WalkState, Op);
 680                 if (ACPI_FAILURE (Status))
 681                 {
 682                     break;
 683                 }
 684             }
 685             else if (Op->Common.AmlOpcode == AML_DATA_REGION_OP)
 686             {
 687                 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
 688                     "Executing DataTableRegion Strings Op=%p\n", Op));
 689
 690                 Status = AcpiDsEvalTableRegionOperands (WalkState, Op);
 691                 if (ACPI_FAILURE (Status))
 692                 {
 693                     break;
 694                 }
 695             }
 696             else if (Op->Common.AmlOpcode == AML_BANK_FIELD_OP)
 697             {
 698                 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
 699                     "Executing BankField Op=%p\n", Op));
 700
 701                 Status = AcpiDsEvalBankFieldOperands (WalkState, Op);
 702                 if (ACPI_FAILURE (Status))
 703                 {
 704                     break;
 705                 }
 706             }
 707             break;
 708
 709         case AML_TYPE_UNDEFINED:
 710
 711             ACPI_ERROR ((AE_INFO,
 712                 "Undefined opcode type Op=%p", Op));
 713             return_ACPI_STATUS (AE_NOT_IMPLEMENTED);
 714
 715         case AML_TYPE_BOGUS:
 716
 717             ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
 718                 "Internal opcode=%X type Op=%p\n",
 719                 WalkState->Opcode, Op));
 720             break;
 721
 722         default:
 723
 724             ACPI_ERROR ((AE_INFO,
 725                 "Unimplemented opcode, class=0x%X "
 726                 "type=0x%X Opcode=0x%X Op=%p",
 727                 OpClass, OpType, Op->Common.AmlOpcode, Op));
 728
 729             Status = AE_NOT_IMPLEMENTED;
 730             break;
 731         }
 732     }
 733
 734     /*
 735      * ACPI 2.0 support for 64-bit integers: Truncate numeric
 736      * result value if we are executing from a 32-bit ACPI table
 737      */
 738     (void) AcpiExTruncateFor32bitTable (WalkState->ResultObj);
 739
 740     /*
 741      * Check if we just completed the evaluation of a
 742      * conditional predicate
 743      */
 744     if ((ACPI_SUCCESS (Status)) &&
 745         (WalkState->ControlState) &&
 746         (WalkState->ControlState->Common.State ==
 747             ACPI_CONTROL_PREDICATE_EXECUTING) &&
 748         (WalkState->ControlState->Control.PredicateOp == Op))
 749     {
 750         Status = AcpiDsGetPredicateValue (WalkState, WalkState->ResultObj);
 751         WalkState->ResultObj = NULL;
 752     }
 753
 754
 755 Cleanup:
 756
 757     if (WalkState->ResultObj)
 758     {
 759         /* Break to debugger to display result */
 760
 761         AcpiDbDisplayResultObject (WalkState->ResultObj,WalkState);
 762
 763         /*
 764          * Delete the result op if and only if:
 765          * Parent will not use the result -- such as any
 766          * non-nested type2 op in a method (parent will be method)
 767          */
 768         AcpiDsDeleteResultIfNotUsed (Op, WalkState->ResultObj, WalkState);
 769     }
 770
 771 #ifdef _UNDER_DEVELOPMENT
 772
 773     if (WalkState->ParserState.Aml == WalkState->ParserState.AmlEnd)
 774     {
 775         AcpiDbMethodEnd (WalkState);
 776     }
 777 #endif
 778
 779     /* Invoke exception handler on error */
 780
 781     if (ACPI_FAILURE (Status))
 782     {
 783         Status = AcpiDsMethodError (Status, WalkState);
 784     }
 785
 786     /* Always clear the object stack */
 787
 788     WalkState->NumOperands = 0;
 789     return_ACPI_STATUS (Status);
 790 }