/******************************************************************************* * * Module Name: dsutils - Dispatcher utilities * $Revision: 1.127 $ * ******************************************************************************/ /****************************************************************************** * * 1. Copyright Notice * * Some or all of this work - Copyright (c) 1999 - 2008, 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 __DSUTILS_C__ #include "acpi.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 ("dsutils") /******************************************************************************* * * FUNCTION: AcpiDsClearImplicitReturn * * PARAMETERS: WalkState - Current State * * RETURN: None. * * DESCRIPTION: Clear and remove a reference on an implicit return value. Used * to delete "stale" return values (if enabled, the return value * from every operator is saved at least momentarily, in case the * parent method exits.) * ******************************************************************************/ void AcpiDsClearImplicitReturn ( ACPI_WALK_STATE *WalkState) { ACPI_FUNCTION_NAME (DsClearImplicitReturn); /* * Slack must be enabled for this feature */ if (!AcpiGbl_EnableInterpreterSlack) { return; } if (WalkState->ImplicitReturnObj) { /* * Delete any "stale" implicit return. However, in * complex statements, the implicit return value can be * bubbled up several levels. */ ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Removing reference on stale implicit return obj %p\n", WalkState->ImplicitReturnObj)); AcpiUtRemoveReference (WalkState->ImplicitReturnObj); WalkState->ImplicitReturnObj = NULL; } } #ifndef ACPI_NO_METHOD_EXECUTION /******************************************************************************* * * FUNCTION: AcpiDsDoImplicitReturn * * PARAMETERS: ReturnDesc - The return value * WalkState - Current State * AddReference - True if a reference should be added to the * return object * * RETURN: TRUE if implicit return enabled, FALSE otherwise * * DESCRIPTION: Implements the optional "implicit return". We save the result * of every ASL operator and control method invocation in case the * parent method exit. Before storing a new return value, we * delete the previous return value. * ******************************************************************************/ BOOLEAN AcpiDsDoImplicitReturn ( ACPI_OPERAND_OBJECT *ReturnDesc, ACPI_WALK_STATE *WalkState, BOOLEAN AddReference) { ACPI_FUNCTION_NAME (DsDoImplicitReturn); /* * Slack must be enabled for this feature, and we must * have a valid return object */ if ((!AcpiGbl_EnableInterpreterSlack) || (!ReturnDesc)) { return (FALSE); } ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Result %p will be implicitly returned; Prev=%p\n", ReturnDesc, WalkState->ImplicitReturnObj)); /* * Delete any "stale" implicit return value first. However, in * complex statements, the implicit return value can be * bubbled up several levels, so we don't clear the value if it * is the same as the ReturnDesc. */ if (WalkState->ImplicitReturnObj) { if (WalkState->ImplicitReturnObj == ReturnDesc) { return (TRUE); } AcpiDsClearImplicitReturn (WalkState); } /* Save the implicit return value, add a reference if requested */ WalkState->ImplicitReturnObj = ReturnDesc; if (AddReference) { AcpiUtAddReference (ReturnDesc); } return (TRUE); } /******************************************************************************* * * FUNCTION: AcpiDsIsResultUsed * * PARAMETERS: Op - Current Op * WalkState - Current State * * RETURN: TRUE if result is used, FALSE otherwise * * DESCRIPTION: Check if a result object will be used by the parent * ******************************************************************************/ BOOLEAN AcpiDsIsResultUsed ( ACPI_PARSE_OBJECT *Op, ACPI_WALK_STATE *WalkState) { const ACPI_OPCODE_INFO *ParentInfo; ACPI_FUNCTION_TRACE_PTR (DsIsResultUsed, Op); /* Must have both an Op and a Result Object */ if (!Op) { ACPI_ERROR ((AE_INFO, "Null Op")); return_UINT8 (TRUE); } /* * We know that this operator is not a * Return() operator (would not come here.) The following code is the * optional support for a so-called "implicit return". Some AML code * assumes that the last value of the method is "implicitly" returned * to the caller. Just save the last result as the return value. * NOTE: this is optional because the ASL language does not actually * support this behavior. */ (void) AcpiDsDoImplicitReturn (WalkState->ResultObj, WalkState, TRUE); /* * Now determine if the parent will use the result * * If there is no parent, or the parent is a ScopeOp, we are executing * at the method level. An executing method typically has no parent, * since each method is parsed separately. A method invoked externally * via ExecuteControlMethod has a ScopeOp as the parent. */ if ((!Op->Common.Parent) || (Op->Common.Parent->Common.AmlOpcode == AML_SCOPE_OP)) { /* No parent, the return value cannot possibly be used */ ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "At Method level, result of [%s] not used\n", AcpiPsGetOpcodeName (Op->Common.AmlOpcode))); return_UINT8 (FALSE); } /* Get info on the parent. The RootOp is AML_SCOPE */ ParentInfo = AcpiPsGetOpcodeInfo (Op->Common.Parent->Common.AmlOpcode); if (ParentInfo->Class == AML_CLASS_UNKNOWN) { ACPI_ERROR ((AE_INFO, "Unknown parent opcode Op=%p", Op)); return_UINT8 (FALSE); } /* * Decide what to do with the result based on the parent. If * the parent opcode will not use the result, delete the object. * Otherwise leave it as is, it will be deleted when it is used * as an operand later. */ switch (ParentInfo->Class) { case AML_CLASS_CONTROL: switch (Op->Common.Parent->Common.AmlOpcode) { case AML_RETURN_OP: /* Never delete the return value associated with a return opcode */ goto ResultUsed; case AML_IF_OP: case AML_WHILE_OP: /* * If we are executing the predicate AND this is the predicate op, * we will use the return value */ if ((WalkState->ControlState->Common.State == ACPI_CONTROL_PREDICATE_EXECUTING) && (WalkState->ControlState->Control.PredicateOp == Op)) { goto ResultUsed; } break; default: /* Ignore other control opcodes */ break; } /* The general control opcode returns no result */ goto ResultNotUsed; case AML_CLASS_CREATE: /* * These opcodes allow TermArg(s) as operands and therefore * the operands can be method calls. The result is used. */ goto ResultUsed; case AML_CLASS_NAMED_OBJECT: if ((Op->Common.Parent->Common.AmlOpcode == AML_REGION_OP) || (Op->Common.Parent->Common.AmlOpcode == AML_DATA_REGION_OP) || (Op->Common.Parent->Common.AmlOpcode == AML_PACKAGE_OP) || (Op->Common.Parent->Common.AmlOpcode == AML_VAR_PACKAGE_OP) || (Op->Common.Parent->Common.AmlOpcode == AML_BUFFER_OP) || (Op->Common.Parent->Common.AmlOpcode == AML_INT_EVAL_SUBTREE_OP) || (Op->Common.Parent->Common.AmlOpcode == AML_BANK_FIELD_OP)) { /* * These opcodes allow TermArg(s) as operands and therefore * the operands can be method calls. The result is used. */ goto ResultUsed; } goto ResultNotUsed; default: /* * In all other cases. the parent will actually use the return * object, so keep it. */ goto ResultUsed; } ResultUsed: ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Result of [%s] used by Parent [%s] Op=%p\n", AcpiPsGetOpcodeName (Op->Common.AmlOpcode), AcpiPsGetOpcodeName (Op->Common.Parent->Common.AmlOpcode), Op)); return_UINT8 (TRUE); ResultNotUsed: ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Result of [%s] not used by Parent [%s] Op=%p\n", AcpiPsGetOpcodeName (Op->Common.AmlOpcode), AcpiPsGetOpcodeName (Op->Common.Parent->Common.AmlOpcode), Op)); return_UINT8 (FALSE); } /******************************************************************************* * * FUNCTION: AcpiDsDeleteResultIfNotUsed * * PARAMETERS: Op - Current parse Op * ResultObj - Result of the operation * WalkState - Current state * * RETURN: Status * * DESCRIPTION: Used after interpretation of an opcode. If there is an internal * result descriptor, check if the parent opcode will actually use * this result. If not, delete the result now so that it will * not become orphaned. * ******************************************************************************/ void AcpiDsDeleteResultIfNotUsed ( ACPI_PARSE_OBJECT *Op, ACPI_OPERAND_OBJECT *ResultObj, ACPI_WALK_STATE *WalkState) { ACPI_OPERAND_OBJECT *ObjDesc; ACPI_STATUS Status; ACPI_FUNCTION_TRACE_PTR (DsDeleteResultIfNotUsed, ResultObj); if (!Op) { ACPI_ERROR ((AE_INFO, "Null Op")); return_VOID; } if (!ResultObj) { return_VOID; } if (!AcpiDsIsResultUsed (Op, WalkState)) { /* Must pop the result stack (ObjDesc should be equal to ResultObj) */ Status = AcpiDsResultPop (&ObjDesc, WalkState); if (ACPI_SUCCESS (Status)) { AcpiUtRemoveReference (ResultObj); } } return_VOID; } /******************************************************************************* * * FUNCTION: AcpiDsResolveOperands * * PARAMETERS: WalkState - Current walk state with operands on stack * * RETURN: Status * * DESCRIPTION: Resolve all operands to their values. Used to prepare * arguments to a control method invocation (a call from one * method to another.) * ******************************************************************************/ ACPI_STATUS AcpiDsResolveOperands ( ACPI_WALK_STATE *WalkState) { UINT32 i; ACPI_STATUS Status = AE_OK; ACPI_FUNCTION_TRACE_PTR (DsResolveOperands, WalkState); /* * Attempt to resolve each of the valid operands * Method arguments are passed by reference, not by value. This means * that the actual objects are passed, not copies of the objects. */ for (i = 0; i < WalkState->NumOperands; i++) { Status = AcpiExResolveToValue (&WalkState->Operands[i], WalkState); if (ACPI_FAILURE (Status)) { break; } } return_ACPI_STATUS (Status); } /******************************************************************************* * * FUNCTION: AcpiDsClearOperands * * PARAMETERS: WalkState - Current walk state with operands on stack * * RETURN: None * * DESCRIPTION: Clear all operands on the current walk state operand stack. * ******************************************************************************/ void AcpiDsClearOperands ( ACPI_WALK_STATE *WalkState) { UINT32 i; ACPI_FUNCTION_TRACE_PTR (DsClearOperands, WalkState); /* Remove a reference on each operand on the stack */ for (i = 0; i < WalkState->NumOperands; i++) { /* * Remove a reference to all operands, including both * "Arguments" and "Targets". */ AcpiUtRemoveReference (WalkState->Operands[i]); WalkState->Operands[i] = NULL; } WalkState->NumOperands = 0; return_VOID; } #endif /******************************************************************************* * * FUNCTION: AcpiDsCreateOperand * * PARAMETERS: WalkState - Current walk state * Arg - Parse object for the argument * ArgIndex - Which argument (zero based) * * RETURN: Status * * DESCRIPTION: Translate a parse tree object that is an argument to an AML * opcode to the equivalent interpreter object. This may include * looking up a name or entering a new name into the internal * namespace. * ******************************************************************************/ ACPI_STATUS AcpiDsCreateOperand ( ACPI_WALK_STATE *WalkState, ACPI_PARSE_OBJECT *Arg, UINT32 ArgIndex) { ACPI_STATUS Status = AE_OK; char *NameString; UINT32 NameLength; ACPI_OPERAND_OBJECT *ObjDesc; ACPI_PARSE_OBJECT *ParentOp; UINT16 Opcode; ACPI_INTERPRETER_MODE InterpreterMode; const ACPI_OPCODE_INFO *OpInfo; ACPI_FUNCTION_TRACE_PTR (DsCreateOperand, Arg); /* A valid name must be looked up in the namespace */ if ((Arg->Common.AmlOpcode == AML_INT_NAMEPATH_OP) && (Arg->Common.Value.String) && !(Arg->Common.Flags & ACPI_PARSEOP_IN_STACK)) { ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Getting a name: Arg=%p\n", Arg)); /* Get the entire name string from the AML stream */ Status = AcpiExGetNameString (ACPI_TYPE_ANY, Arg->Common.Value.Buffer, &NameString, &NameLength); if (ACPI_FAILURE (Status)) { return_ACPI_STATUS (Status); } /* All prefixes have been handled, and the name is in NameString */ /* * Special handling for BufferField declarations. This is a deferred * opcode that unfortunately defines the field name as the last * parameter instead of the first. We get here when we are performing * the deferred execution, so the actual name of the field is already * in the namespace. We don't want to attempt to look it up again * because we may be executing in a different scope than where the * actual opcode exists. */ if ((WalkState->DeferredNode) && (WalkState->DeferredNode->Type == ACPI_TYPE_BUFFER_FIELD) && (ArgIndex == (UINT32) ((WalkState->Opcode == AML_CREATE_FIELD_OP) ? 3 : 2))) { ObjDesc = ACPI_CAST_PTR ( ACPI_OPERAND_OBJECT, WalkState->DeferredNode); Status = AE_OK; } else /* All other opcodes */ { /* * Differentiate between a namespace "create" operation * versus a "lookup" operation (IMODE_LOAD_PASS2 vs. * IMODE_EXECUTE) in order to support the creation of * namespace objects during the execution of control methods. */ ParentOp = Arg->Common.Parent; OpInfo = AcpiPsGetOpcodeInfo (ParentOp->Common.AmlOpcode); if ((OpInfo->Flags & AML_NSNODE) && (ParentOp->Common.AmlOpcode != AML_INT_METHODCALL_OP) && (ParentOp->Common.AmlOpcode != AML_REGION_OP) && (ParentOp->Common.AmlOpcode != AML_INT_NAMEPATH_OP)) { /* Enter name into namespace if not found */ InterpreterMode = ACPI_IMODE_LOAD_PASS2; } else { /* Return a failure if name not found */ InterpreterMode = ACPI_IMODE_EXECUTE; } Status = AcpiNsLookup (WalkState->ScopeInfo, NameString, ACPI_TYPE_ANY, InterpreterMode, ACPI_NS_SEARCH_PARENT | ACPI_NS_DONT_OPEN_SCOPE, WalkState, ACPI_CAST_INDIRECT_PTR (ACPI_NAMESPACE_NODE, &ObjDesc)); /* * The only case where we pass through (ignore) a NOT_FOUND * error is for the CondRefOf opcode. */ if (Status == AE_NOT_FOUND) { if (ParentOp->Common.AmlOpcode == AML_COND_REF_OF_OP) { /* * For the Conditional Reference op, it's OK if * the name is not found; We just need a way to * indicate this to the interpreter, set the * object to the root */ ObjDesc = ACPI_CAST_PTR ( ACPI_OPERAND_OBJECT, AcpiGbl_RootNode); Status = AE_OK; } else { /* * We just plain didn't find it -- which is a * very serious error at this point */ Status = AE_AML_NAME_NOT_FOUND; } } if (ACPI_FAILURE (Status)) { ACPI_ERROR_NAMESPACE (NameString, Status); } } /* Free the namestring created above */ ACPI_FREE (NameString); /* Check status from the lookup */ if (ACPI_FAILURE (Status)) { return_ACPI_STATUS (Status); } /* Put the resulting object onto the current object stack */ Status = AcpiDsObjStackPush (ObjDesc, WalkState); if (ACPI_FAILURE (Status)) { return_ACPI_STATUS (Status); } ACPI_DEBUGGER_EXEC (AcpiDbDisplayArgumentObject (ObjDesc, WalkState)); } else { /* Check for null name case */ if ((Arg->Common.AmlOpcode == AML_INT_NAMEPATH_OP) && !(Arg->Common.Flags & ACPI_PARSEOP_IN_STACK)) { /* * If the name is null, this means that this is an * optional result parameter that was not specified * in the original ASL. Create a Zero Constant for a * placeholder. (Store to a constant is a Noop.) */ Opcode = AML_ZERO_OP; /* Has no arguments! */ ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Null namepath: Arg=%p\n", Arg)); } else { Opcode = Arg->Common.AmlOpcode; } /* Get the object type of the argument */ OpInfo = AcpiPsGetOpcodeInfo (Opcode); if (OpInfo->ObjectType == ACPI_TYPE_INVALID) { return_ACPI_STATUS (AE_NOT_IMPLEMENTED); } if ((OpInfo->Flags & AML_HAS_RETVAL) || (Arg->Common.Flags & ACPI_PARSEOP_IN_STACK)) { ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Argument previously created, already stacked\n")); ACPI_DEBUGGER_EXEC (AcpiDbDisplayArgumentObject ( WalkState->Operands [WalkState->NumOperands - 1], WalkState)); /* * Use value that was already previously returned * by the evaluation of this argument */ Status = AcpiDsResultPop (&ObjDesc, WalkState); if (ACPI_FAILURE (Status)) { /* * Only error is underflow, and this indicates * a missing or null operand! */ ACPI_EXCEPTION ((AE_INFO, Status, "Missing or null operand")); return_ACPI_STATUS (Status); } } else { /* Create an ACPI_INTERNAL_OBJECT for the argument */ ObjDesc = AcpiUtCreateInternalObject (OpInfo->ObjectType); if (!ObjDesc) { return_ACPI_STATUS (AE_NO_MEMORY); } /* Initialize the new object */ Status = AcpiDsInitObjectFromOp ( WalkState, Arg, Opcode, &ObjDesc); if (ACPI_FAILURE (Status)) { AcpiUtDeleteObjectDesc (ObjDesc); return_ACPI_STATUS (Status); } } /* Put the operand object on the object stack */ Status = AcpiDsObjStackPush (ObjDesc, WalkState); if (ACPI_FAILURE (Status)) { return_ACPI_STATUS (Status); } ACPI_DEBUGGER_EXEC (AcpiDbDisplayArgumentObject (ObjDesc, WalkState)); } return_ACPI_STATUS (AE_OK); } /******************************************************************************* * * FUNCTION: AcpiDsCreateOperands * * PARAMETERS: WalkState - Current state * FirstArg - First argument of a parser argument tree * * RETURN: Status * * DESCRIPTION: Convert an operator's arguments from a parse tree format to * namespace objects and place those argument object on the object * stack in preparation for evaluation by the interpreter. * ******************************************************************************/ ACPI_STATUS AcpiDsCreateOperands ( ACPI_WALK_STATE *WalkState, ACPI_PARSE_OBJECT *FirstArg) { ACPI_STATUS Status = AE_OK; ACPI_PARSE_OBJECT *Arg; ACPI_PARSE_OBJECT *Arguments[ACPI_OBJ_NUM_OPERANDS]; UINT32 ArgCount = 0; UINT32 Index = WalkState->NumOperands; UINT32 i; ACPI_FUNCTION_TRACE_PTR (DsCreateOperands, FirstArg); /* Get all arguments in the list */ Arg = FirstArg; while (Arg) { if (Index >= ACPI_OBJ_NUM_OPERANDS) { return_ACPI_STATUS (AE_BAD_DATA); } Arguments[Index] = Arg; WalkState->Operands [Index] = NULL; /* Move on to next argument, if any */ Arg = Arg->Common.Next; ArgCount++; Index++; } Index--; /* It is the appropriate order to get objects from the Result stack */ for (i = 0; i < ArgCount; i++) { Arg = Arguments[Index]; /* Force the filling of the operand stack in inverse order */ WalkState->OperandIndex = (UINT8) Index; Status = AcpiDsCreateOperand (WalkState, Arg, Index); if (ACPI_FAILURE (Status)) { goto Cleanup; } Index--; ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Arg #%d (%p) done, Arg1=%p\n", Index, Arg, FirstArg)); } return_ACPI_STATUS (Status); Cleanup: /* * We must undo everything done above; meaning that we must * pop everything off of the operand stack and delete those * objects */ AcpiDsObjStackPopAndDelete (ArgCount, WalkState); ACPI_EXCEPTION ((AE_INFO, Status, "While creating Arg %d", Index)); return_ACPI_STATUS (Status); } /***************************************************************************** * * FUNCTION: AcpiDsEvaluateNamePath * * PARAMETERS: WalkState - Current state of the parse tree walk, * the opcode of current operation should be * AML_INT_NAMEPATH_OP * * RETURN: Status * * DESCRIPTION: Translate the -NamePath- parse tree object to the equivalent * interpreter object, convert it to value, if needed, duplicate * it, if needed, and push it onto the current result stack. * ****************************************************************************/ ACPI_STATUS AcpiDsEvaluateNamePath ( ACPI_WALK_STATE *WalkState) { ACPI_STATUS Status = AE_OK; ACPI_PARSE_OBJECT *Op = WalkState->Op; ACPI_OPERAND_OBJECT **Operand = &WalkState->Operands[0]; ACPI_OPERAND_OBJECT *NewObjDesc; UINT8 Type; ACPI_FUNCTION_TRACE_PTR (DsEvaluateNamePath, WalkState); if (!Op->Common.Parent) { /* This happens after certain exception processing */ goto Exit; } if ((Op->Common.Parent->Common.AmlOpcode == AML_PACKAGE_OP) || (Op->Common.Parent->Common.AmlOpcode == AML_VAR_PACKAGE_OP) || (Op->Common.Parent->Common.AmlOpcode == AML_REF_OF_OP)) { /* TBD: Should we specify this feature as a bit of OpInfo->Flags of these opcodes? */ goto Exit; } Status = AcpiDsCreateOperand (WalkState, Op, 0); if (ACPI_FAILURE (Status)) { goto Exit; } if (Op->Common.Flags & ACPI_PARSEOP_TARGET) { NewObjDesc = *Operand; goto PushResult; } Type = ACPI_GET_OBJECT_TYPE (*Operand); Status = AcpiExResolveToValue (Operand, WalkState); if (ACPI_FAILURE (Status)) { goto Exit; } if (Type == ACPI_TYPE_INTEGER) { /* It was incremented by AcpiExResolveToValue */ AcpiUtRemoveReference (*Operand); Status = AcpiUtCopyIobjectToIobject (*Operand, &NewObjDesc, WalkState); if (ACPI_FAILURE (Status)) { goto Exit; } } else { /* * The object either was anew created or is * a Namespace node - don't decrement it. */ NewObjDesc = *Operand; } /* Cleanup for name-path operand */ Status = AcpiDsObjStackPop (1, WalkState); if (ACPI_FAILURE (Status)) { WalkState->ResultObj = NewObjDesc; goto Exit; } PushResult: WalkState->ResultObj = NewObjDesc; Status = AcpiDsResultPush (WalkState->ResultObj, WalkState); if (ACPI_SUCCESS (Status)) { /* Force to take it from stack */ Op->Common.Flags |= ACPI_PARSEOP_IN_STACK; } Exit: return_ACPI_STATUS (Status); }