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 /******************************************************************************
  *
  * Module Name: dswexec - Dispatcher method execution callbacks;
  *                        dispatch to interpreter.
  *
  *****************************************************************************/
 
 /******************************************************************************
  *
  * 1. Copyright Notice
  *
  * Some or all of this work - Copyright (c) 1999 - 2024, Intel Corp.
  * All rights reserved.
  *
  * 2. License
  *
  * 2.1. This is your license from Intel Corp. under its intellectual property
  * rights. You may have additional license terms from the party that provided
  * you this software, covering your right to use that party's intellectual
  * property rights.
  *
  * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
  * copy of the source code appearing in this file ("Covered Code") an
  * irrevocable, perpetual, worldwide license under Intel's copyrights in the
  * base code distributed originally by Intel ("Original Intel Code") to copy,
  * make derivatives, distribute, use and display any portion of the Covered
  * Code in any form, with the right to sublicense such rights; and
  *
  * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
  * license (with the right to sublicense), under only those claims of Intel
  * patents that are infringed by the Original Intel Code, to make, use, sell,
  * offer to sell, and import the Covered Code and derivative works thereof
  * solely to the minimum extent necessary to exercise the above copyright
  * license, and in no event shall the patent license extend to any additions
  * to or modifications of the Original Intel Code. No other license or right
  * is granted directly or by implication, estoppel or otherwise;
  *
  * The above copyright and patent license is granted only if the following
  * conditions are met:
  *
  * 3. Conditions
  *
  * 3.1. Redistribution of Source with Rights to Further Distribute Source.
  * Redistribution of source code of any substantial portion of the Covered
  * Code or modification with rights to further distribute source must include
  * the above Copyright Notice, the above License, this list of Conditions,
  * and the following Disclaimer and Export Compliance provision. In addition,
  * Licensee must cause all Covered Code to which Licensee contributes to
  * contain a file documenting the changes Licensee made to create that Covered
  * Code and the date of any change. Licensee must include in that file the
  * documentation of any changes made by any predecessor Licensee. Licensee
  * must include a prominent statement that the modification is derived,
  * directly or indirectly, from Original Intel Code.
  *
  * 3.2. Redistribution of Source with no Rights to Further Distribute Source.
  * Redistribution of source code of any substantial portion of the Covered
  * Code or modification without rights to further distribute source must
  * include the following Disclaimer and Export Compliance provision in the
  * documentation and/or other materials provided with distribution. In
  * addition, Licensee may not authorize further sublicense of source of any
  * portion of the Covered Code, and must include terms to the effect that the
  * license from Licensee to its licensee is limited to the intellectual
  * property embodied in the software Licensee provides to its licensee, and
  * not to intellectual property embodied in modifications its licensee may
  * make.
  *
  * 3.3. Redistribution of Executable. Redistribution in executable form of any
  * substantial portion of the Covered Code or modification must reproduce the
  * above Copyright Notice, and the following Disclaimer and Export Compliance
  * provision in the documentation and/or other materials provided with the
  * distribution.
  *
  * 3.4. Intel retains all right, title, and interest in and to the Original
  * Intel Code.
  *
  * 3.5. Neither the name Intel nor any other trademark owned or controlled by
  * Intel shall be used in advertising or otherwise to promote the sale, use or
  * other dealings in products derived from or relating to the Covered Code
  * without prior written authorization from Intel.
  *
  * 4. Disclaimer and Export Compliance
  *
  * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
  * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
  * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
  * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
  * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
  * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
  * PARTICULAR PURPOSE.
  *
  * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
  * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
  * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
  * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
  * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
  * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
  * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
  * LIMITED REMEDY.
  *
  * 4.3. Licensee shall not export, either directly or indirectly, any of this
  * software or system incorporating such software without first obtaining any
  * required license or other approval from the U. S. Department of Commerce or
  * any other agency or department of the United States Government. In the
  * event Licensee exports any such software from the United States or
  * re-exports any such software from a foreign destination, Licensee shall
  * ensure that the distribution and export/re-export of the software is in
  * compliance with all laws, regulations, orders, or other restrictions of the
  * U.S. Export Administration Regulations. Licensee agrees that neither it nor
  * any of its subsidiaries will export/re-export any technical data, process,
  * software, or service, directly or indirectly, to any country for which the
  * United States government or any agency thereof requires an export license,
  * other governmental approval, or letter of assurance, without first obtaining
  * such license, approval or letter.
  *
  *****************************************************************************
  *
  * Alternatively, you may choose to be licensed under the terms of the
  * following license:
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions, and the following disclaimer,
  *    without modification.
  * 2. Redistributions in binary form must reproduce at minimum a disclaimer
  *    substantially similar to the "NO WARRANTY" disclaimer below
  *    ("Disclaimer") and any redistribution must be conditioned upon
  *    including a substantially similar Disclaimer requirement for further
  *    binary redistribution.
  * 3. Neither the names of the above-listed copyright holders nor the names
  *    of any contributors may be used to endorse or promote products derived
  *    from this software without specific prior written permission.
  *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *
  * Alternatively, you may choose to be licensed under the terms of the
  * GNU General Public License ("GPL") version 2 as published by the Free
  * Software Foundation.
  *
  *****************************************************************************/
 
 #include "acpi.h"
 #include "accommon.h"
 #include "acparser.h"
 #include "amlcode.h"
 #include "acdispat.h"
 #include "acinterp.h"
 #include "acnamesp.h"
 #include "acdebug.h"
 #ifdef ACPI_EXEC_APP
 #include "aecommon.h"
 #endif
 
 #define _COMPONENT          ACPI_DISPATCHER
         ACPI_MODULE_NAME    ("dswexec")
 
 /*
  * Dispatch table for opcode classes
  */
 static ACPI_EXECUTE_OP      AcpiGbl_OpTypeDispatch [] =
 {
     AcpiExOpcode_0A_0T_1R,
     AcpiExOpcode_1A_0T_0R,
     AcpiExOpcode_1A_0T_1R,
     NULL,   /* Was: AcpiExOpcode_1A_0T_0R (Was for Load operator) */
     AcpiExOpcode_1A_1T_1R,
     AcpiExOpcode_2A_0T_0R,
     AcpiExOpcode_2A_0T_1R,
     AcpiExOpcode_2A_1T_1R,
     AcpiExOpcode_2A_2T_1R,
     AcpiExOpcode_3A_0T_0R,
     AcpiExOpcode_3A_1T_1R,
     AcpiExOpcode_6A_0T_1R
 };
 
 
 /*****************************************************************************
  *
  * FUNCTION:    AcpiDsGetPredicateValue
  *
  * PARAMETERS:  WalkState       - Current state of the parse tree walk
  *              ResultObj       - if non-zero, pop result from result stack
  *
  * RETURN:      Status
  *
  * DESCRIPTION: Get the result of a predicate evaluation
  *
  ****************************************************************************/
 
 ACPI_STATUS
 AcpiDsGetPredicateValue (
     ACPI_WALK_STATE         *WalkState,
     ACPI_OPERAND_OBJECT     *ResultObj)
 {
     ACPI_STATUS             Status = AE_OK;
     ACPI_OPERAND_OBJECT     *ObjDesc;
     ACPI_OPERAND_OBJECT     *LocalObjDesc = NULL;
 
 
     ACPI_FUNCTION_TRACE_PTR (DsGetPredicateValue, WalkState);
 
 
     WalkState->ControlState->Common.State = 0;
 
     if (ResultObj)
     {
         Status = AcpiDsResultPop (&ObjDesc, WalkState);
         if (ACPI_FAILURE (Status))
         {
             ACPI_EXCEPTION ((AE_INFO, Status,
                 "Could not get result from predicate evaluation"));
 
             return_ACPI_STATUS (Status);
         }
     }
     else
     {
         Status = AcpiDsCreateOperand (WalkState, WalkState->Op, 0);
         if (ACPI_FAILURE (Status))
         {
             return_ACPI_STATUS (Status);
         }
 
         Status = AcpiExResolveToValue (&WalkState->Operands [0], WalkState);
         if (ACPI_FAILURE (Status))
         {
             return_ACPI_STATUS (Status);
         }
 
         ObjDesc = WalkState->Operands [0];
     }
 
     if (!ObjDesc)
     {
         ACPI_ERROR ((AE_INFO,
             "No predicate ObjDesc=%p State=%p",
             ObjDesc, WalkState));
 
         return_ACPI_STATUS (AE_AML_NO_OPERAND);
     }
 
     /*
      * Result of predicate evaluation must be an Integer
      * object. Implicitly convert the argument if necessary.
      */
     Status = AcpiExConvertToInteger (ObjDesc, &LocalObjDesc,
         ACPI_IMPLICIT_CONVERSION);
     if (ACPI_FAILURE (Status))
     {
         goto Cleanup;
     }
 
     if (LocalObjDesc->Common.Type != ACPI_TYPE_INTEGER)
     {
         ACPI_ERROR ((AE_INFO,
             "Bad predicate (not an integer) ObjDesc=%p State=%p Type=0x%X",
             ObjDesc, WalkState, ObjDesc->Common.Type));
 
         Status = AE_AML_OPERAND_TYPE;
         goto Cleanup;
     }
 
     /* Truncate the predicate to 32-bits if necessary */
 
     (void) AcpiExTruncateFor32bitTable (LocalObjDesc);
 
     /*
      * Save the result of the predicate evaluation on
      * the control stack
      */
     if (LocalObjDesc->Integer.Value)
     {
         WalkState->ControlState->Common.Value = TRUE;
     }
     else
     {
         /*
          * Predicate is FALSE, we will just toss the
          * rest of the package
          */
         WalkState->ControlState->Common.Value = FALSE;
         Status = AE_CTRL_FALSE;
     }
 
     /* Predicate can be used for an implicit return value */
 
     (void) AcpiDsDoImplicitReturn (LocalObjDesc, WalkState, TRUE);
 
 
 Cleanup:
 
     ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
         "Completed a predicate eval=%X Op=%p\n",
         WalkState->ControlState->Common.Value, WalkState->Op));
 
     /* Break to debugger to display result */
 
     AcpiDbDisplayResultObject (LocalObjDesc, WalkState);
 
     /*
      * Delete the predicate result object (we know that
      * we don't need it anymore)
      */
     if (LocalObjDesc != ObjDesc)
     {
         AcpiUtRemoveReference (LocalObjDesc);
     }
     AcpiUtRemoveReference (ObjDesc);
 
     WalkState->ControlState->Common.State = ACPI_CONTROL_NORMAL;
     return_ACPI_STATUS (Status);
 }
 
 
 /*****************************************************************************
  *
  * FUNCTION:    AcpiDsExecBeginOp
  *
  * PARAMETERS:  WalkState       - Current state of the parse tree walk
  *              OutOp           - Where to return op if a new one is created
  *
  * RETURN:      Status
  *
  * DESCRIPTION: Descending callback used during the execution of control
  *              methods. This is where most operators and operands are
  *              dispatched to the interpreter.
  *
  ****************************************************************************/
 
 ACPI_STATUS
 AcpiDsExecBeginOp (
     ACPI_WALK_STATE         *WalkState,
     ACPI_PARSE_OBJECT       **OutOp)
 {
     ACPI_PARSE_OBJECT       *Op;
     ACPI_STATUS             Status = AE_OK;
     UINT32                  OpcodeClass;
 
 
     ACPI_FUNCTION_TRACE_PTR (DsExecBeginOp, WalkState);
 
 
     Op = WalkState->Op;
     if (!Op)
     {
         Status = AcpiDsLoad2BeginOp (WalkState, OutOp);
         if (ACPI_FAILURE (Status))
         {
             goto ErrorExit;
         }
 
         Op = *OutOp;
         WalkState->Op = Op;
         WalkState->Opcode = Op->Common.AmlOpcode;
         WalkState->OpInfo = AcpiPsGetOpcodeInfo (Op->Common.AmlOpcode);
 
         if (AcpiNsOpensScope (WalkState->OpInfo->ObjectType))
         {
             ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
                 "(%s) Popping scope for Op %p\n",
                 AcpiUtGetTypeName (WalkState->OpInfo->ObjectType), Op));
 
             Status = AcpiDsScopeStackPop (WalkState);
             if (ACPI_FAILURE (Status))
             {
                 goto ErrorExit;
             }
         }
     }
 
     if (Op == WalkState->Origin)
     {
         if (OutOp)
         {
             *OutOp = Op;
         }
 
         return_ACPI_STATUS (AE_OK);
     }
 
     /*
      * If the previous opcode was a conditional, this opcode
      * must be the beginning of the associated predicate.
      * Save this knowledge in the current scope descriptor
      */
     if ((WalkState->ControlState) &&
         (WalkState->ControlState->Common.State ==
             ACPI_CONTROL_CONDITIONAL_EXECUTING))
     {
         ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
             "Exec predicate Op=%p State=%p\n",
             Op, WalkState));
 
         WalkState->ControlState->Common.State =
             ACPI_CONTROL_PREDICATE_EXECUTING;
 
         /* Save start of predicate */
 
         WalkState->ControlState->Control.PredicateOp = Op;
     }
 
 
     OpcodeClass = WalkState->OpInfo->Class;
 
     /* We want to send namepaths to the load code */
 
     if (Op->Common.AmlOpcode == AML_INT_NAMEPATH_OP)
     {
         OpcodeClass = AML_CLASS_NAMED_OBJECT;
     }
 
     /*
      * Handle the opcode based upon the opcode type
      */
     switch (OpcodeClass)
     {
     case AML_CLASS_CONTROL:
 
         Status = AcpiDsExecBeginControlOp (WalkState, Op);
         break;
 
     case AML_CLASS_NAMED_OBJECT:
 
         if (WalkState->WalkType & ACPI_WALK_METHOD)
         {
             /*
              * Found a named object declaration during method execution;
              * we must enter this object into the namespace. The created
              * object is temporary and will be deleted upon completion of
              * the execution of this method.
              *
              * Note 10/2010: Except for the Scope() op. This opcode does
              * not actually create a new object, it refers to an existing
              * object. However, for Scope(), we want to indeed open a
              * new scope.
              */
             if (Op->Common.AmlOpcode != AML_SCOPE_OP)
             {
                 Status = AcpiDsLoad2BeginOp (WalkState, NULL);
             }
             else
             {
                 Status = AcpiDsScopeStackPush (
                     Op->Named.Node, Op->Named.Node->Type, WalkState);
                 if (ACPI_FAILURE (Status))
                 {
                     return_ACPI_STATUS (Status);
                 }
             }
         }
         break;
 
     case AML_CLASS_EXECUTE:
     case AML_CLASS_CREATE:
 
         break;
 
     default:
 
         break;
     }
 
     /* Nothing to do here during method execution */
 
     return_ACPI_STATUS (Status);
 
 
 ErrorExit:
     Status = AcpiDsMethodError (Status, WalkState);
     return_ACPI_STATUS (Status);
 }
 
 
 /*****************************************************************************
  *
  * FUNCTION:    AcpiDsExecEndOp
  *
  * PARAMETERS:  WalkState       - Current state of the parse tree walk
  *
  * RETURN:      Status
  *
  * DESCRIPTION: Ascending callback used during the execution of control
  *              methods. The only thing we really need to do here is to
  *              notice the beginning of IF, ELSE, and WHILE blocks.
  *
  ****************************************************************************/
 
 ACPI_STATUS
 AcpiDsExecEndOp (
     ACPI_WALK_STATE         *WalkState)
 {
     ACPI_PARSE_OBJECT       *Op;
     ACPI_STATUS             Status = AE_OK;
     UINT32                  OpType;
     UINT32                  OpClass;
     ACPI_PARSE_OBJECT       *NextOp;
     ACPI_PARSE_OBJECT       *FirstArg;
 #ifdef ACPI_EXEC_APP
     char                    *Namepath;
     ACPI_OPERAND_OBJECT     *ObjDesc;
 #endif
 
     ACPI_FUNCTION_TRACE_PTR (DsExecEndOp, WalkState);
 
 
     Op = WalkState->Op;
     OpType = WalkState->OpInfo->Type;
     OpClass = WalkState->OpInfo->Class;
 
     if (OpClass == AML_CLASS_UNKNOWN)
     {
         ACPI_ERROR ((AE_INFO, "Unknown opcode 0x%X", Op->Common.AmlOpcode));
         return_ACPI_STATUS (AE_NOT_IMPLEMENTED);
     }
 
     FirstArg = Op->Common.Value.Arg;
 
     /* Init the walk state */
 
     WalkState->NumOperands = 0;
     WalkState->OperandIndex = 0;
     WalkState->ReturnDesc = NULL;
     WalkState->ResultObj = NULL;
 
     /* Call debugger for single step support (DEBUG build only) */
 
     Status = AcpiDbSingleStep (WalkState, Op, OpClass);
     if (ACPI_FAILURE (Status))
     {
         return_ACPI_STATUS (Status);
     }
 
     /* Decode the Opcode Class */
 
     switch (OpClass)
     {
     case AML_CLASS_ARGUMENT:    /* Constants, literals, etc. */
 
         if (WalkState->Opcode == AML_INT_NAMEPATH_OP)
         {
             Status = AcpiDsEvaluateNamePath (WalkState);
             if (ACPI_FAILURE (Status))
             {
                 goto Cleanup;
             }
         }
         break;
 
     case AML_CLASS_EXECUTE:     /* Most operators with arguments */
 
         /* Build resolved operand stack */
 
         Status = AcpiDsCreateOperands (WalkState, FirstArg);
         if (ACPI_FAILURE (Status))
         {
             goto Cleanup;
         }
 
         /*
          * All opcodes require operand resolution, with the only exceptions
          * being the ObjectType and SizeOf operators as well as opcodes that
          * take no arguments.
          */
         if (!(WalkState->OpInfo->Flags & AML_NO_OPERAND_RESOLVE) &&
             (WalkState->OpInfo->Flags & AML_HAS_ARGS))
         {
             /* Resolve all operands */
 
             Status = AcpiExResolveOperands (WalkState->Opcode,
                 &(WalkState->Operands [WalkState->NumOperands -1]),
                 WalkState);
         }
 
         if (ACPI_SUCCESS (Status))
         {
             /*
              * Dispatch the request to the appropriate interpreter handler
              * routine. There is one routine per opcode "type" based upon the
              * number of opcode arguments and return type.
              */
             Status = AcpiGbl_OpTypeDispatch[OpType] (WalkState);
         }
         else
         {
             /*
              * Treat constructs of the form "Store(LocalX,LocalX)" as noops when the
              * Local is uninitialized.
              */
             if  ((Status == AE_AML_UNINITIALIZED_LOCAL) &&
                 (WalkState->Opcode == AML_STORE_OP) &&
                 (WalkState->Operands[0]->Common.Type == ACPI_TYPE_LOCAL_REFERENCE) &&
                 (WalkState->Operands[1]->Common.Type == ACPI_TYPE_LOCAL_REFERENCE) &&
                 (WalkState->Operands[0]->Reference.Class ==
                  WalkState->Operands[1]->Reference.Class) &&
                 (WalkState->Operands[0]->Reference.Value ==
                  WalkState->Operands[1]->Reference.Value))
             {
                 Status = AE_OK;
             }
             else
             {
                 ACPI_EXCEPTION ((AE_INFO, Status,
                     "While resolving operands for [%s]",
                     AcpiPsGetOpcodeName (WalkState->Opcode)));
             }
         }
 
         /* Always delete the argument objects and clear the operand stack */
 
         AcpiDsClearOperands (WalkState);
 
         /*
          * If a result object was returned from above, push it on the
          * current result stack
          */
         if (ACPI_SUCCESS (Status) &&
             WalkState->ResultObj)
         {
             Status = AcpiDsResultPush (WalkState->ResultObj, WalkState);
         }
         break;
 
     default:
 
         switch (OpType)
         {
         case AML_TYPE_CONTROL:    /* Type 1 opcode, IF/ELSE/WHILE/NOOP */
 
             /* 1 Operand, 0 ExternalResult, 0 InternalResult */
 
             Status = AcpiDsExecEndControlOp (WalkState, Op);
 
             break;
 
         case AML_TYPE_METHOD_CALL:
             /*
              * If the method is referenced from within a package
              * declaration, it is not a invocation of the method, just
              * a reference to it.
              */
             if ((Op->Asl.Parent) &&
                ((Op->Asl.Parent->Asl.AmlOpcode == AML_PACKAGE_OP) ||
                 (Op->Asl.Parent->Asl.AmlOpcode == AML_VARIABLE_PACKAGE_OP)))
             {
                 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
                     "Method Reference in a Package, Op=%p\n", Op));
 
                 Op->Common.Node = (ACPI_NAMESPACE_NODE *)
                     Op->Asl.Value.Arg->Asl.Node;
                 AcpiUtAddReference (Op->Asl.Value.Arg->Asl.Node->Object);
                 return_ACPI_STATUS (AE_OK);
             }
 
             ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
                 "Method invocation, Op=%p\n", Op));
 
             /*
              * (AML_METHODCALL) Op->Asl.Value.Arg->Asl.Node contains
              * the method Node pointer
              */
             /* NextOp points to the op that holds the method name */
 
             NextOp = FirstArg;
 
             /* NextOp points to first argument op */
 
             NextOp = NextOp->Common.Next;
 
             /*
              * Get the method's arguments and put them on the operand stack
              */
             Status = AcpiDsCreateOperands (WalkState, NextOp);
             if (ACPI_FAILURE (Status))
             {
                 break;
             }
 
             /*
              * Since the operands will be passed to another control method,
              * we must resolve all local references here (Local variables,
              * arguments to *this* method, etc.)
              */
             Status = AcpiDsResolveOperands (WalkState);
             if (ACPI_FAILURE (Status))
             {
                 /* On error, clear all resolved operands */
 
                 AcpiDsClearOperands (WalkState);
                 break;
             }
 
             /*
              * Tell the walk loop to preempt this running method and
              * execute the new method
              */
             Status = AE_CTRL_TRANSFER;
 
             /*
              * Return now; we don't want to disturb anything,
              * especially the operand count!
              */
             return_ACPI_STATUS (Status);
 
         case AML_TYPE_CREATE_FIELD:
 
             ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
                 "Executing CreateField Buffer/Index Op=%p\n", Op));
 
             Status = AcpiDsLoad2EndOp (WalkState);
             if (ACPI_FAILURE (Status))
             {
                 break;
             }
 
             Status = AcpiDsEvalBufferFieldOperands (WalkState, Op);
             if (ACPI_FAILURE (Status))
             {
                 break;
             }
 
 #ifdef ACPI_EXEC_APP
             /*
              * AcpiExec support for namespace initialization file (initialize
              * BufferFields in this code.)
              */
             Namepath = AcpiNsGetExternalPathname (Op->Common.Node);
             Status = AeLookupInitFileEntry (Namepath, &ObjDesc);
             if (ACPI_SUCCESS (Status))
             {
                 Status = AcpiExWriteDataToField (ObjDesc, Op->Common.Node->Object, NULL);
                 if (ACPI_FAILURE (Status))
                 {
                     ACPI_EXCEPTION ((AE_INFO, Status, "While writing to buffer field"));
                 }
             }
             ACPI_FREE (Namepath);
             Status = AE_OK;
 #endif
             break;
 
 
         case AML_TYPE_CREATE_OBJECT:
 
             ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
                 "Executing CreateObject (Buffer/Package) Op=%p Child=%p ParentOpcode=%4.4X\n",
                 Op, Op->Named.Value.Arg, Op->Common.Parent->Common.AmlOpcode));
 
             switch (Op->Common.Parent->Common.AmlOpcode)
             {
             case AML_NAME_OP:
                 /*
                  * Put the Node on the object stack (Contains the ACPI Name
                  * of this object)
                  */
                 WalkState->Operands[0] = (void *)
                     Op->Common.Parent->Common.Node;
                 WalkState->NumOperands = 1;
 
                 Status = AcpiDsCreateNode (WalkState,
                     Op->Common.Parent->Common.Node, Op->Common.Parent);
                 if (ACPI_FAILURE (Status))
                 {
                     break;
                 }
 
                 ACPI_FALLTHROUGH;
 
             case AML_INT_EVAL_SUBTREE_OP:
 
                 Status = AcpiDsEvalDataObjectOperands (WalkState, Op,
                     AcpiNsGetAttachedObject (Op->Common.Parent->Common.Node));
                 break;
 
             default:
 
                 Status = AcpiDsEvalDataObjectOperands (WalkState, Op, NULL);
                 break;
             }
 
             /*
              * If a result object was returned from above, push it on the
              * current result stack
              */
             if (WalkState->ResultObj)
             {
                 Status = AcpiDsResultPush (WalkState->ResultObj, WalkState);
             }
             break;
 
         case AML_TYPE_NAMED_FIELD:
         case AML_TYPE_NAMED_COMPLEX:
         case AML_TYPE_NAMED_SIMPLE:
         case AML_TYPE_NAMED_NO_OBJ:
 
             Status = AcpiDsLoad2EndOp (WalkState);
             if (ACPI_FAILURE (Status))
             {
                 break;
             }
 
             if (Op->Common.AmlOpcode == AML_REGION_OP)
             {
                 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
                     "Executing OpRegion Address/Length Op=%p\n", Op));
 
                 Status = AcpiDsEvalRegionOperands (WalkState, Op);
                 if (ACPI_FAILURE (Status))
                 {
                     break;
                 }
             }
             else if (Op->Common.AmlOpcode == AML_DATA_REGION_OP)
             {
                 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
                     "Executing DataTableRegion Strings Op=%p\n", Op));
 
                 Status = AcpiDsEvalTableRegionOperands (WalkState, Op);
                 if (ACPI_FAILURE (Status))
                 {
                     break;
                 }
             }
             else if (Op->Common.AmlOpcode == AML_BANK_FIELD_OP)
             {
                 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
                     "Executing BankField Op=%p\n", Op));
 
                 Status = AcpiDsEvalBankFieldOperands (WalkState, Op);
                 if (ACPI_FAILURE (Status))
                 {
                     break;
                 }
             }
             break;
 
         case AML_TYPE_UNDEFINED:
 
             ACPI_ERROR ((AE_INFO,
                 "Undefined opcode type Op=%p", Op));
             return_ACPI_STATUS (AE_NOT_IMPLEMENTED);
 
         case AML_TYPE_BOGUS:
 
             ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
                 "Internal opcode=%X type Op=%p\n",
                 WalkState->Opcode, Op));
             break;
 
         default:
 
             ACPI_ERROR ((AE_INFO,
                 "Unimplemented opcode, class=0x%X "
                 "type=0x%X Opcode=0x%X Op=%p",
                 OpClass, OpType, Op->Common.AmlOpcode, Op));
 
             Status = AE_NOT_IMPLEMENTED;
             break;
         }
     }
 
     /*
      * ACPI 2.0 support for 64-bit integers: Truncate numeric
      * result value if we are executing from a 32-bit ACPI table
      */
     (void) AcpiExTruncateFor32bitTable (WalkState->ResultObj);
 
     /*
      * Check if we just completed the evaluation of a
      * conditional predicate
      */
     if ((ACPI_SUCCESS (Status)) &&
         (WalkState->ControlState) &&
         (WalkState->ControlState->Common.State ==
             ACPI_CONTROL_PREDICATE_EXECUTING) &&
         (WalkState->ControlState->Control.PredicateOp == Op))
     {
         Status = AcpiDsGetPredicateValue (WalkState, WalkState->ResultObj);
         WalkState->ResultObj = NULL;
     }
 
 
 Cleanup:
 
     if (WalkState->ResultObj)
     {
         /* Break to debugger to display result */
 
         AcpiDbDisplayResultObject (WalkState->ResultObj,WalkState);
 
         /*
          * Delete the result op if and only if:
          * Parent will not use the result -- such as any
          * non-nested type2 op in a method (parent will be method)
          */
         AcpiDsDeleteResultIfNotUsed (Op, WalkState->ResultObj, WalkState);
     }
 
 #ifdef _UNDER_DEVELOPMENT
 
     if (WalkState->ParserState.Aml == WalkState->ParserState.AmlEnd)
     {
         AcpiDbMethodEnd (WalkState);
     }
 #endif
 
     /* Invoke exception handler on error */
 
     if (ACPI_FAILURE (Status))
     {
         Status = AcpiDsMethodError (Status, WalkState);
     }
 
     /* Always clear the object stack */
 
     WalkState->NumOperands = 0;
     return_ACPI_STATUS (Status);
 }

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