/****************************************************************************** * * Module Name: dswload2 - Dispatcher second pass namespace load callbacks * *****************************************************************************/ /****************************************************************************** * * 1. Copyright Notice * * Some or all of this work - Copyright (c) 1999 - 2020, 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 #include #include #include #include #include #include #include #define _COMPONENT ACPI_DISPATCHER ACPI_MODULE_NAME ("dswload2") /******************************************************************************* * * FUNCTION: AcpiDsLoad2BeginOp * * 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 loading of ACPI tables. * ******************************************************************************/ ACPI_STATUS AcpiDsLoad2BeginOp ( ACPI_WALK_STATE *WalkState, ACPI_PARSE_OBJECT **OutOp) { ACPI_PARSE_OBJECT *Op; ACPI_NAMESPACE_NODE *Node; ACPI_STATUS Status; ACPI_OBJECT_TYPE ObjectType; char *BufferPtr; UINT32 Flags; ACPI_FUNCTION_TRACE (DsLoad2BeginOp); Op = WalkState->Op; ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Op=%p State=%p\n", Op, WalkState)); if (Op) { if ((WalkState->ControlState) && (WalkState->ControlState->Common.State == ACPI_CONTROL_CONDITIONAL_EXECUTING)) { /* We are executing a while loop outside of a method */ Status = AcpiDsExecBeginOp (WalkState, OutOp); return_ACPI_STATUS (Status); } /* We only care about Namespace opcodes here */ if ((!(WalkState->OpInfo->Flags & AML_NSOPCODE) && (WalkState->Opcode != AML_INT_NAMEPATH_OP)) || (!(WalkState->OpInfo->Flags & AML_NAMED))) { return_ACPI_STATUS (AE_OK); } /* Get the name we are going to enter or lookup in the namespace */ if (WalkState->Opcode == AML_INT_NAMEPATH_OP) { /* For Namepath op, get the path string */ BufferPtr = Op->Common.Value.String; if (!BufferPtr) { /* No name, just exit */ return_ACPI_STATUS (AE_OK); } } else { /* Get name from the op */ BufferPtr = ACPI_CAST_PTR (char, &Op->Named.Name); } } else { /* Get the namestring from the raw AML */ BufferPtr = AcpiPsGetNextNamestring (&WalkState->ParserState); } /* Map the opcode into an internal object type */ ObjectType = WalkState->OpInfo->ObjectType; ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "State=%p Op=%p Type=%X\n", WalkState, Op, ObjectType)); switch (WalkState->Opcode) { case AML_FIELD_OP: case AML_BANK_FIELD_OP: case AML_INDEX_FIELD_OP: Node = NULL; Status = AE_OK; break; case AML_INT_NAMEPATH_OP: /* * The NamePath is an object reference to an existing object. * Don't enter the name into the namespace, but look it up * for use later. */ Status = AcpiNsLookup (WalkState->ScopeInfo, BufferPtr, ObjectType, ACPI_IMODE_EXECUTE, ACPI_NS_SEARCH_PARENT, WalkState, &(Node)); break; case AML_SCOPE_OP: /* Special case for Scope(\) -> refers to the Root node */ if (Op && (Op->Named.Node == AcpiGbl_RootNode)) { Node = Op->Named.Node; Status = AcpiDsScopeStackPush (Node, ObjectType, WalkState); if (ACPI_FAILURE (Status)) { return_ACPI_STATUS (Status); } } else { /* * The Path is an object reference to an existing object. * Don't enter the name into the namespace, but look it up * for use later. */ Status = AcpiNsLookup (WalkState->ScopeInfo, BufferPtr, ObjectType, ACPI_IMODE_EXECUTE, ACPI_NS_SEARCH_PARENT, WalkState, &(Node)); if (ACPI_FAILURE (Status)) { #ifdef ACPI_ASL_COMPILER if (Status == AE_NOT_FOUND) { Status = AE_OK; } else { ACPI_ERROR_NAMESPACE (WalkState->ScopeInfo, BufferPtr, Status); } #else ACPI_ERROR_NAMESPACE (WalkState->ScopeInfo, BufferPtr, Status); #endif return_ACPI_STATUS (Status); } } /* * We must check to make sure that the target is * one of the opcodes that actually opens a scope */ switch (Node->Type) { case ACPI_TYPE_ANY: case ACPI_TYPE_LOCAL_SCOPE: /* Scope */ case ACPI_TYPE_DEVICE: case ACPI_TYPE_POWER: case ACPI_TYPE_PROCESSOR: case ACPI_TYPE_THERMAL: /* These are acceptable types */ break; case ACPI_TYPE_INTEGER: case ACPI_TYPE_STRING: case ACPI_TYPE_BUFFER: /* * These types we will allow, but we will change the type. * This enables some existing code of the form: * * Name (DEB, 0) * Scope (DEB) { ... } */ ACPI_WARNING ((AE_INFO, "Type override - [%4.4s] had invalid type (%s) " "for Scope operator, changed to type ANY", AcpiUtGetNodeName (Node), AcpiUtGetTypeName (Node->Type))); Node->Type = ACPI_TYPE_ANY; WalkState->ScopeInfo->Common.Value = ACPI_TYPE_ANY; break; case ACPI_TYPE_METHOD: /* * Allow scope change to root during execution of module-level * code. Root is typed METHOD during this time. */ if ((Node == AcpiGbl_RootNode) && (WalkState->ParseFlags & ACPI_PARSE_MODULE_LEVEL)) { break; } /*lint -fallthrough */ default: /* All other types are an error */ ACPI_ERROR ((AE_INFO, "Invalid type (%s) for target of " "Scope operator [%4.4s] (Cannot override)", AcpiUtGetTypeName (Node->Type), AcpiUtGetNodeName (Node))); return_ACPI_STATUS (AE_AML_OPERAND_TYPE); } break; default: /* All other opcodes */ if (Op && Op->Common.Node) { /* This op/node was previously entered into the namespace */ Node = Op->Common.Node; if (AcpiNsOpensScope (ObjectType)) { Status = AcpiDsScopeStackPush (Node, ObjectType, WalkState); if (ACPI_FAILURE (Status)) { return_ACPI_STATUS (Status); } } return_ACPI_STATUS (AE_OK); } /* * Enter the named type into the internal namespace. We enter the name * as we go downward in the parse tree. Any necessary subobjects that * involve arguments to the opcode must be created as we go back up the * parse tree later. * * Note: Name may already exist if we are executing a deferred opcode. */ if (WalkState->DeferredNode) { /* This name is already in the namespace, get the node */ Node = WalkState->DeferredNode; Status = AE_OK; break; } Flags = ACPI_NS_NO_UPSEARCH; if (WalkState->PassNumber == ACPI_IMODE_EXECUTE) { /* Execution mode, node cannot already exist, node is temporary */ Flags |= ACPI_NS_ERROR_IF_FOUND; if (!(WalkState->ParseFlags & ACPI_PARSE_MODULE_LEVEL)) { Flags |= ACPI_NS_TEMPORARY; } } #ifdef ACPI_ASL_COMPILER /* * Do not open a scope for AML_EXTERNAL_OP * AcpiNsLookup can open a new scope based on the object type * of this op. AML_EXTERNAL_OP is a declaration rather than a * definition. In the case that this external is a method object, * AcpiNsLookup will open a new scope. However, an AML_EXTERNAL_OP * associated with the ACPI_TYPE_METHOD is a declaration, rather than * a definition. Flags is set to avoid opening a scope for any * AML_EXTERNAL_OP. */ if (WalkState->Opcode == AML_EXTERNAL_OP) { Flags |= ACPI_NS_DONT_OPEN_SCOPE; } #endif /* * For name creation opcodes, the full namepath prefix must * exist, except for the final (new) nameseg. */ if (WalkState->OpInfo->Flags & AML_NAMED) { Flags |= ACPI_NS_PREFIX_MUST_EXIST; } /* Add new entry or lookup existing entry */ Status = AcpiNsLookup (WalkState->ScopeInfo, BufferPtr, ObjectType, ACPI_IMODE_LOAD_PASS2, Flags, WalkState, &Node); if (ACPI_SUCCESS (Status) && (Flags & ACPI_NS_TEMPORARY)) { ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "***New Node [%4.4s] %p is temporary\n", AcpiUtGetNodeName (Node), Node)); } break; } if (ACPI_FAILURE (Status)) { ACPI_ERROR_NAMESPACE (WalkState->ScopeInfo, BufferPtr, Status); return_ACPI_STATUS (Status); } if (!Op) { /* Create a new op */ Op = AcpiPsAllocOp (WalkState->Opcode, WalkState->Aml); if (!Op) { return_ACPI_STATUS (AE_NO_MEMORY); } /* Initialize the new op */ if (Node) { Op->Named.Name = Node->Name.Integer; } *OutOp = Op; } /* * Put the Node in the "op" object that the parser uses, so we * can get it again quickly when this scope is closed */ Op->Common.Node = Node; return_ACPI_STATUS (Status); } /******************************************************************************* * * FUNCTION: AcpiDsLoad2EndOp * * PARAMETERS: WalkState - Current state of the parse tree walk * * RETURN: Status * * DESCRIPTION: Ascending callback used during the loading of the namespace, * both control methods and everything else. * ******************************************************************************/ ACPI_STATUS AcpiDsLoad2EndOp ( ACPI_WALK_STATE *WalkState) { ACPI_PARSE_OBJECT *Op; ACPI_STATUS Status = AE_OK; ACPI_OBJECT_TYPE ObjectType; ACPI_NAMESPACE_NODE *Node; ACPI_PARSE_OBJECT *Arg; ACPI_NAMESPACE_NODE *NewNode; UINT32 i; UINT8 RegionSpace; ACPI_FUNCTION_TRACE (DsLoad2EndOp); Op = WalkState->Op; ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Opcode [%s] Op %p State %p\n", WalkState->OpInfo->Name, Op, WalkState)); /* Check if opcode had an associated namespace object */ if (!(WalkState->OpInfo->Flags & AML_NSOBJECT)) { return_ACPI_STATUS (AE_OK); } if (Op->Common.AmlOpcode == AML_SCOPE_OP) { ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Ending scope Op=%p State=%p\n", Op, WalkState)); } ObjectType = WalkState->OpInfo->ObjectType; /* * Get the Node/name from the earlier lookup * (It was saved in the *op structure) */ Node = Op->Common.Node; /* * Put the Node on the object stack (Contains the ACPI Name of * this object) */ WalkState->Operands[0] = (void *) Node; WalkState->NumOperands = 1; /* Pop the scope stack */ if (AcpiNsOpensScope (ObjectType) && (Op->Common.AmlOpcode != AML_INT_METHODCALL_OP)) { ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "(%s) Popping scope for Op %p\n", AcpiUtGetTypeName (ObjectType), Op)); Status = AcpiDsScopeStackPop (WalkState); if (ACPI_FAILURE (Status)) { goto Cleanup; } } /* * Named operations are as follows: * * AML_ALIAS * AML_BANKFIELD * AML_CREATEBITFIELD * AML_CREATEBYTEFIELD * AML_CREATEDWORDFIELD * AML_CREATEFIELD * AML_CREATEQWORDFIELD * AML_CREATEWORDFIELD * AML_DATA_REGION * AML_DEVICE * AML_EVENT * AML_FIELD * AML_INDEXFIELD * AML_METHOD * AML_METHODCALL * AML_MUTEX * AML_NAME * AML_NAMEDFIELD * AML_OPREGION * AML_POWERRES * AML_PROCESSOR * AML_SCOPE * AML_THERMALZONE */ ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Create-Load [%s] State=%p Op=%p NamedObj=%p\n", AcpiPsGetOpcodeName (Op->Common.AmlOpcode), WalkState, Op, Node)); /* Decode the opcode */ Arg = Op->Common.Value.Arg; switch (WalkState->OpInfo->Type) { case AML_TYPE_CREATE_FIELD: /* * Create the field object, but the field buffer and index must * be evaluated later during the execution phase */ Status = AcpiDsCreateBufferField (Op, WalkState); break; case AML_TYPE_NAMED_FIELD: /* * If we are executing a method, initialize the field */ if (WalkState->MethodNode) { Status = AcpiDsInitFieldObjects (Op, WalkState); } switch (Op->Common.AmlOpcode) { case AML_INDEX_FIELD_OP: Status = AcpiDsCreateIndexField ( Op, (ACPI_HANDLE) Arg->Common.Node, WalkState); break; case AML_BANK_FIELD_OP: Status = AcpiDsCreateBankField (Op, Arg->Common.Node, WalkState); break; case AML_FIELD_OP: Status = AcpiDsCreateField (Op, Arg->Common.Node, WalkState); break; default: /* All NAMED_FIELD opcodes must be handled above */ break; } break; case AML_TYPE_NAMED_SIMPLE: Status = AcpiDsCreateOperands (WalkState, Arg); if (ACPI_FAILURE (Status)) { goto Cleanup; } switch (Op->Common.AmlOpcode) { case AML_PROCESSOR_OP: Status = AcpiExCreateProcessor (WalkState); break; case AML_POWER_RESOURCE_OP: Status = AcpiExCreatePowerResource (WalkState); break; case AML_MUTEX_OP: Status = AcpiExCreateMutex (WalkState); break; case AML_EVENT_OP: Status = AcpiExCreateEvent (WalkState); break; case AML_ALIAS_OP: Status = AcpiExCreateAlias (WalkState); break; default: /* Unknown opcode */ Status = AE_OK; goto Cleanup; } /* Delete operands */ for (i = 1; i < WalkState->NumOperands; i++) { AcpiUtRemoveReference (WalkState->Operands[i]); WalkState->Operands[i] = NULL; } break; case AML_TYPE_NAMED_COMPLEX: switch (Op->Common.AmlOpcode) { case AML_REGION_OP: case AML_DATA_REGION_OP: if (Op->Common.AmlOpcode == AML_REGION_OP) { RegionSpace = (ACPI_ADR_SPACE_TYPE) ((Op->Common.Value.Arg)->Common.Value.Integer); } else { RegionSpace = ACPI_ADR_SPACE_DATA_TABLE; } /* * The OpRegion is not fully parsed at this time. The only valid * argument is the SpaceId. (We must save the address of the * AML of the address and length operands) * * If we have a valid region, initialize it. The namespace is * unlocked at this point. * * Need to unlock interpreter if it is locked (if we are running * a control method), in order to allow _REG methods to be run * during AcpiEvInitializeRegion. */ if (WalkState->MethodNode) { /* * Executing a method: initialize the region and unlock * the interpreter */ Status = AcpiExCreateRegion (Op->Named.Data, Op->Named.Length, RegionSpace, WalkState); if (ACPI_FAILURE (Status)) { return_ACPI_STATUS (Status); } } Status = AcpiEvInitializeRegion ( AcpiNsGetAttachedObject (Node)); break; case AML_NAME_OP: Status = AcpiDsCreateNode (WalkState, Node, Op); break; case AML_METHOD_OP: /* * MethodOp PkgLength NameString MethodFlags TermList * * Note: We must create the method node/object pair as soon as we * see the method declaration. This allows later pass1 parsing * of invocations of the method (need to know the number of * arguments.) */ ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "LOADING-Method: State=%p Op=%p NamedObj=%p\n", WalkState, Op, Op->Named.Node)); if (!AcpiNsGetAttachedObject (Op->Named.Node)) { WalkState->Operands[0] = ACPI_CAST_PTR (void, Op->Named.Node); WalkState->NumOperands = 1; Status = AcpiDsCreateOperands ( WalkState, Op->Common.Value.Arg); if (ACPI_SUCCESS (Status)) { Status = AcpiExCreateMethod ( Op->Named.Data, Op->Named.Length, WalkState); } WalkState->Operands[0] = NULL; WalkState->NumOperands = 0; if (ACPI_FAILURE (Status)) { return_ACPI_STATUS (Status); } } break; default: /* All NAMED_COMPLEX opcodes must be handled above */ break; } break; case AML_CLASS_INTERNAL: /* case AML_INT_NAMEPATH_OP: */ break; case AML_CLASS_METHOD_CALL: ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "RESOLVING-MethodCall: State=%p Op=%p NamedObj=%p\n", WalkState, Op, Node)); /* * Lookup the method name and save the Node */ Status = AcpiNsLookup (WalkState->ScopeInfo, Arg->Common.Value.String, ACPI_TYPE_ANY, ACPI_IMODE_LOAD_PASS2, ACPI_NS_SEARCH_PARENT | ACPI_NS_DONT_OPEN_SCOPE, WalkState, &(NewNode)); if (ACPI_SUCCESS (Status)) { /* * Make sure that what we found is indeed a method * We didn't search for a method on purpose, to see if the name * would resolve */ if (NewNode->Type != ACPI_TYPE_METHOD) { Status = AE_AML_OPERAND_TYPE; } /* We could put the returned object (Node) on the object stack for * later, but for now, we will put it in the "op" object that the * parser uses, so we can get it again at the end of this scope */ Op->Common.Node = NewNode; } else { ACPI_ERROR_NAMESPACE (WalkState->ScopeInfo, Arg->Common.Value.String, Status); } break; default: break; } Cleanup: /* Remove the Node pushed at the very beginning */ WalkState->Operands[0] = NULL; WalkState->NumOperands = 0; return_ACPI_STATUS (Status); }