1010 lines
32 KiB
C
1010 lines
32 KiB
C
/*******************************************************************************
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*
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* Module Name: dsutils - Dispatcher utilities
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*
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******************************************************************************/
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/******************************************************************************
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*
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* 1. Copyright Notice
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*
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* Some or all of this work - Copyright (c) 1999 - 2010, Intel Corp.
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* All rights reserved.
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*
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* 2. License
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*
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* 2.1. This is your license from Intel Corp. under its intellectual property
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* rights. You may have additional license terms from the party that provided
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* you this software, covering your right to use that party's intellectual
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* property rights.
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*
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* 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
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* copy of the source code appearing in this file ("Covered Code") an
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* irrevocable, perpetual, worldwide license under Intel's copyrights in the
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* base code distributed originally by Intel ("Original Intel Code") to copy,
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* make derivatives, distribute, use and display any portion of the Covered
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* Code in any form, with the right to sublicense such rights; and
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*
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* 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
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* license (with the right to sublicense), under only those claims of Intel
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* patents that are infringed by the Original Intel Code, to make, use, sell,
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* offer to sell, and import the Covered Code and derivative works thereof
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* solely to the minimum extent necessary to exercise the above copyright
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* license, and in no event shall the patent license extend to any additions
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* to or modifications of the Original Intel Code. No other license or right
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* is granted directly or by implication, estoppel or otherwise;
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*
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* The above copyright and patent license is granted only if the following
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* conditions are met:
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*
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* 3. Conditions
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*
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* 3.1. Redistribution of Source with Rights to Further Distribute Source.
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* Redistribution of source code of any substantial portion of the Covered
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* Code or modification with rights to further distribute source must include
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* the above Copyright Notice, the above License, this list of Conditions,
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* and the following Disclaimer and Export Compliance provision. In addition,
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* Licensee must cause all Covered Code to which Licensee contributes to
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* contain a file documenting the changes Licensee made to create that Covered
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* Code and the date of any change. Licensee must include in that file the
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* documentation of any changes made by any predecessor Licensee. Licensee
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* must include a prominent statement that the modification is derived,
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* directly or indirectly, from Original Intel Code.
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*
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* 3.2. Redistribution of Source with no Rights to Further Distribute Source.
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* Redistribution of source code of any substantial portion of the Covered
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* Code or modification without rights to further distribute source must
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|
* include the following Disclaimer and Export Compliance provision in the
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* documentation and/or other materials provided with distribution. In
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* addition, Licensee may not authorize further sublicense of source of any
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* portion of the Covered Code, and must include terms to the effect that the
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* license from Licensee to its licensee is limited to the intellectual
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* property embodied in the software Licensee provides to its licensee, and
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* not to intellectual property embodied in modifications its licensee may
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* make.
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*
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* 3.3. Redistribution of Executable. Redistribution in executable form of any
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* substantial portion of the Covered Code or modification must reproduce the
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* above Copyright Notice, and the following Disclaimer and Export Compliance
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* provision in the documentation and/or other materials provided with the
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* distribution.
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*
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* 3.4. Intel retains all right, title, and interest in and to the Original
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* Intel Code.
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*
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* 3.5. Neither the name Intel nor any other trademark owned or controlled by
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* Intel shall be used in advertising or otherwise to promote the sale, use or
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* other dealings in products derived from or relating to the Covered Code
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* without prior written authorization from Intel.
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*
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* 4. Disclaimer and Export Compliance
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*
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* 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
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* HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
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* IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
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* INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
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* UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
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* IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
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* PARTICULAR PURPOSE.
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*
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* 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
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* OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
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* COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
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* SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
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* CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
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* HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
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* SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
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* LIMITED REMEDY.
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*
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* 4.3. Licensee shall not export, either directly or indirectly, any of this
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* software or system incorporating such software without first obtaining any
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* required license or other approval from the U. S. Department of Commerce or
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* any other agency or department of the United States Government. In the
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* event Licensee exports any such software from the United States or
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* re-exports any such software from a foreign destination, Licensee shall
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* ensure that the distribution and export/re-export of the software is in
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* compliance with all laws, regulations, orders, or other restrictions of the
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* U.S. Export Administration Regulations. Licensee agrees that neither it nor
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* any of its subsidiaries will export/re-export any technical data, process,
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* software, or service, directly or indirectly, to any country for which the
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* United States government or any agency thereof requires an export license,
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* other governmental approval, or letter of assurance, without first obtaining
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* such license, approval or letter.
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*
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*****************************************************************************/
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#define __DSUTILS_C__
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#include "acpi.h"
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#include "accommon.h"
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#include "acparser.h"
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#include "amlcode.h"
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#include "acdispat.h"
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#include "acinterp.h"
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#include "acnamesp.h"
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#include "acdebug.h"
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#define _COMPONENT ACPI_DISPATCHER
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ACPI_MODULE_NAME ("dsutils")
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/*******************************************************************************
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*
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* FUNCTION: AcpiDsClearImplicitReturn
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*
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* PARAMETERS: WalkState - Current State
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*
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* RETURN: None.
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*
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* DESCRIPTION: Clear and remove a reference on an implicit return value. Used
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* to delete "stale" return values (if enabled, the return value
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* from every operator is saved at least momentarily, in case the
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* parent method exits.)
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*
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******************************************************************************/
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void
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AcpiDsClearImplicitReturn (
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ACPI_WALK_STATE *WalkState)
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{
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ACPI_FUNCTION_NAME (DsClearImplicitReturn);
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/*
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* Slack must be enabled for this feature
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*/
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if (!AcpiGbl_EnableInterpreterSlack)
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{
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return;
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}
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if (WalkState->ImplicitReturnObj)
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{
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/*
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* Delete any "stale" implicit return. However, in
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* complex statements, the implicit return value can be
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* bubbled up several levels.
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*/
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ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
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"Removing reference on stale implicit return obj %p\n",
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WalkState->ImplicitReturnObj));
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AcpiUtRemoveReference (WalkState->ImplicitReturnObj);
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WalkState->ImplicitReturnObj = NULL;
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}
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}
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#ifndef ACPI_NO_METHOD_EXECUTION
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/*******************************************************************************
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*
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* FUNCTION: AcpiDsDoImplicitReturn
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*
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* PARAMETERS: ReturnDesc - The return value
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* WalkState - Current State
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* AddReference - True if a reference should be added to the
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* return object
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*
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* RETURN: TRUE if implicit return enabled, FALSE otherwise
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*
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* DESCRIPTION: Implements the optional "implicit return". We save the result
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* of every ASL operator and control method invocation in case the
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* parent method exit. Before storing a new return value, we
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* delete the previous return value.
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*
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******************************************************************************/
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BOOLEAN
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AcpiDsDoImplicitReturn (
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ACPI_OPERAND_OBJECT *ReturnDesc,
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ACPI_WALK_STATE *WalkState,
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BOOLEAN AddReference)
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{
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ACPI_FUNCTION_NAME (DsDoImplicitReturn);
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|
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/*
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* Slack must be enabled for this feature, and we must
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* have a valid return object
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*/
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if ((!AcpiGbl_EnableInterpreterSlack) ||
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(!ReturnDesc))
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{
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return (FALSE);
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}
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ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
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"Result %p will be implicitly returned; Prev=%p\n",
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ReturnDesc,
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WalkState->ImplicitReturnObj));
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/*
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* Delete any "stale" implicit return value first. However, in
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* complex statements, the implicit return value can be
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* bubbled up several levels, so we don't clear the value if it
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* is the same as the ReturnDesc.
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*/
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if (WalkState->ImplicitReturnObj)
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{
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if (WalkState->ImplicitReturnObj == ReturnDesc)
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{
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return (TRUE);
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}
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AcpiDsClearImplicitReturn (WalkState);
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}
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/* Save the implicit return value, add a reference if requested */
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WalkState->ImplicitReturnObj = ReturnDesc;
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if (AddReference)
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{
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AcpiUtAddReference (ReturnDesc);
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}
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return (TRUE);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiDsIsResultUsed
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*
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* PARAMETERS: Op - Current Op
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* WalkState - Current State
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*
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* RETURN: TRUE if result is used, FALSE otherwise
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*
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* DESCRIPTION: Check if a result object will be used by the parent
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*
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******************************************************************************/
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BOOLEAN
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AcpiDsIsResultUsed (
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ACPI_PARSE_OBJECT *Op,
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ACPI_WALK_STATE *WalkState)
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{
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const ACPI_OPCODE_INFO *ParentInfo;
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ACPI_FUNCTION_TRACE_PTR (DsIsResultUsed, Op);
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|
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/* Must have both an Op and a Result Object */
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if (!Op)
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{
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ACPI_ERROR ((AE_INFO, "Null Op"));
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return_UINT8 (TRUE);
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}
|
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|
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/*
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* We know that this operator is not a
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* Return() operator (would not come here.) The following code is the
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* optional support for a so-called "implicit return". Some AML code
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* assumes that the last value of the method is "implicitly" returned
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* to the caller. Just save the last result as the return value.
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* NOTE: this is optional because the ASL language does not actually
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* support this behavior.
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*/
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(void) AcpiDsDoImplicitReturn (WalkState->ResultObj, WalkState, TRUE);
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/*
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* Now determine if the parent will use the result
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*
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* If there is no parent, or the parent is a ScopeOp, we are executing
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* at the method level. An executing method typically has no parent,
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* since each method is parsed separately. A method invoked externally
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* via ExecuteControlMethod has a ScopeOp as the parent.
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*/
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if ((!Op->Common.Parent) ||
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(Op->Common.Parent->Common.AmlOpcode == AML_SCOPE_OP))
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{
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/* No parent, the return value cannot possibly be used */
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|
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ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
|
|
"At Method level, result of [%s] not used\n",
|
|
AcpiPsGetOpcodeName (Op->Common.AmlOpcode)));
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return_UINT8 (FALSE);
|
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}
|
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|
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/* Get info on the parent. The RootOp is AML_SCOPE */
|
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|
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ParentInfo = AcpiPsGetOpcodeInfo (Op->Common.Parent->Common.AmlOpcode);
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if (ParentInfo->Class == AML_CLASS_UNKNOWN)
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{
|
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ACPI_ERROR ((AE_INFO,
|
|
"Unknown parent opcode Op=%p", Op));
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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)
|
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{
|
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case AML_RETURN_OP:
|
|
|
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/* Never delete the return value associated with a return opcode */
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|
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goto ResultUsed;
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|
|
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case AML_IF_OP:
|
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case AML_WHILE_OP:
|
|
|
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/*
|
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* If we are executing the predicate AND this is the predicate op,
|
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* we will use the return value
|
|
*/
|
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if ((WalkState->ControlState->Common.State == ACPI_CONTROL_PREDICATE_EXECUTING) &&
|
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(WalkState->ControlState->Control.PredicateOp == Op))
|
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{
|
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goto ResultUsed;
|
|
}
|
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break;
|
|
|
|
default:
|
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/* Ignore other control opcodes */
|
|
break;
|
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}
|
|
|
|
/* The general control opcode returns no result */
|
|
|
|
goto ResultNotUsed;
|
|
|
|
|
|
case AML_CLASS_CREATE:
|
|
|
|
/*
|
|
* These opcodes allow TermArg(s) as operands and therefore
|
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* the operands can be method calls. The result is used.
|
|
*/
|
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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) ||
|
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(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
|
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* the operands can be method calls. The result is used.
|
|
*/
|
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goto ResultUsed;
|
|
}
|
|
|
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goto ResultNotUsed;
|
|
|
|
|
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default:
|
|
|
|
/*
|
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* In all other cases. the parent will actually use the return
|
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* 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);
|
|
}
|