/******************************************************************************
*
* Module Name: dswexec - Dispatcher method execution callbacks;
* dispatch to interpreter.
*
*****************************************************************************/
/******************************************************************************
*
* 1. Copyright Notice
*
* Some or all of this work - Copyright (c) 1999 - 2011, 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.
*
*****************************************************************************/
#define __DSWEXEC_C__
#include "acpi.h"
#include "accommon.h"
#include "acparser.h"
#include "amlcode.h"
#include "acdispat.h"
#include "acinterp.h"
#include "acnamesp.h"
#include "acdebug.h"
#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,
AcpiExOpcode_1A_1T_0R,
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, 16);
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 */
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 */
ACPI_DEBUGGER_EXEC (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;
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) */
ACPI_DEBUGGER_EXEC (Status = AcpiDbSingleStep (WalkState, Op, OpClass));
ACPI_DEBUGGER_EXEC (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.
*/
if (!(WalkState->OpInfo->Flags & AML_NO_OPERAND_RESOLVE))
{
/* 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_VAR_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);
break;
case AML_TYPE_CREATE_OBJECT:
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
"Executing CreateObject (Buffer/Package) Op=%p\n", Op));
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;
}
/* Fall through */
/*lint -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
*/
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 */
ACPI_DEBUGGER_EXEC (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);
}