| 0,0 → 1,1009 |
|---|
| /******************************************************************************* |
| * |
| * Module Name: dsutils - Dispatcher utilities |
| * |
| ******************************************************************************/ |
| |
| /****************************************************************************** |
| * |
| * 1. Copyright Notice |
| * |
| * Some or all of this work - Copyright (c) 1999 - 2010, 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 "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 ("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 #%u (%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 %u", 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 = (*Operand)->Common.Type; |
| |
| 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); |
| } |