adwalk.c

acpi tools for linux include acpiexec and acpixtract

/******************************************************************************
 *
 * Module Name: adwalk - Application-level disassembler parse tree walk routines
 *              $Revision: 1.7 $
 *
 *****************************************************************************/

/******************************************************************************
 *
 * 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.
 *
 *****************************************************************************/


#include "acpi.h"
#include "acparser.h"
#include "amlcode.h"
#include "acdebug.h"
#include "acdisasm.h"
#include "acdispat.h"
#include "acnamesp.h"
#include "acapps.h"


#define _COMPONENT          ACPI_TOOLS
        ACPI_MODULE_NAME    ("adwalk")

/*
 * aslmap - opcode mappings and reserved method names
 */
ACPI_OBJECT_TYPE
AslMapNamedOpcodeToDataType (
    UINT16                  Opcode);

/* Local prototypes */

static ACPI_STATUS
AcpiDmFindOrphanDescending (
    ACPI_PARSE_OBJECT       *Op,
    UINT32                  Level,
    void                    *Context);

static ACPI_STATUS
AcpiDmDumpDescending (
    ACPI_PARSE_OBJECT       *Op,
    UINT32                  Level,
    void                    *Context);

static ACPI_STATUS
AcpiDmXrefDescendingOp (
    ACPI_PARSE_OBJECT       *Op,
    UINT32                  Level,
    void                    *Context);

static ACPI_STATUS
AcpiDmCommonAscendingOp (
    ACPI_PARSE_OBJECT       *Op,
    UINT32                  Level,
    void                    *Context);

static ACPI_STATUS
AcpiDmLoadDescendingOp (
    ACPI_PARSE_OBJECT       *Op,
    UINT32                  Level,
    void                    *Context);

static UINT32
AcpiDmInspectPossibleArgs (
    UINT32                  CurrentOpArgCount,
    UINT32                  TargetCount,
    ACPI_PARSE_OBJECT       *Op);

static ACPI_STATUS
AcpiDmResourceDescendingOp (
    ACPI_PARSE_OBJECT       *Op,
    UINT32                  Level,
    void                    *Context);


/*******************************************************************************
 *
 * FUNCTION:    AcpiDmDumpTree
 *
 * PARAMETERS:  Origin          - Starting object
 *
 * RETURN:      None
 *
 * DESCRIPTION: Parse tree walk to format and output the nodes
 *
 ******************************************************************************/

void
AcpiDmDumpTree (
    ACPI_PARSE_OBJECT       *Origin)
{
    ACPI_OP_WALK_INFO       Info;


    if (!Origin)
    {
        return;
    }

    AcpiOsPrintf ("/*\nAML Parse Tree\n\n");
    Info.Flags = 0;
    Info.Count = 0;
    Info.Level = 0;
    Info.WalkState = NULL;
    AcpiDmWalkParseTree (Origin, AcpiDmDumpDescending, NULL, &Info);
    AcpiOsPrintf ("*/\n\n");
}


/*******************************************************************************
 *
 * FUNCTION:    AcpiDmFindOrphanMethods
 *
 * PARAMETERS:  Origin          - Starting object
 *
 * RETURN:      None
 *
 * DESCRIPTION: Parse tree walk to find "orphaned" method invocations -- methods
 *              that are not resolved in the namespace
 *
 ******************************************************************************/

void
AcpiDmFindOrphanMethods (
    ACPI_PARSE_OBJECT       *Origin)
{
    ACPI_OP_WALK_INFO       Info;


    if (!Origin)
    {
        return;
    }

    Info.Flags = 0;
    Info.Level = 0;
    Info.WalkState = NULL;
    AcpiDmWalkParseTree (Origin, AcpiDmFindOrphanDescending, NULL, &Info);
}


/*******************************************************************************
 *
 * FUNCTION:    AcpiDmFinishNamespaceLoad
 *
 * PARAMETERS:  ParseTreeRoot       - Root of the parse tree
 *              NamespaceRoot       - Root of the internal namespace
 *
 * RETURN:      None
 *
 * DESCRIPTION: Load all namespace items that are created within control
 *              methods. Used before namespace cross reference
 *
 ******************************************************************************/

void
AcpiDmFinishNamespaceLoad (
    ACPI_PARSE_OBJECT       *ParseTreeRoot,
    ACPI_NAMESPACE_NODE     *NamespaceRoot)
{
    ACPI_STATUS             Status;
    ACPI_OP_WALK_INFO       Info;
    ACPI_WALK_STATE         *WalkState;


    if (!ParseTreeRoot)
    {
        return;
    }

    /* Create and initialize a new walk state */

    WalkState = AcpiDsCreateWalkState (0, ParseTreeRoot, NULL, NULL);
    if (!WalkState)
    {
        return;
    }

    Status = AcpiDsScopeStackPush (NamespaceRoot, NamespaceRoot->Type, WalkState);
    if (ACPI_FAILURE (Status))
    {
        return;
    }

    Info.Flags = 0;
    Info.Level = 0;
    Info.WalkState = WalkState;
    AcpiDmWalkParseTree (ParseTreeRoot, AcpiDmLoadDescendingOp,
        AcpiDmCommonAscendingOp, &Info);
    ACPI_FREE (WalkState);
}


/*******************************************************************************
 *
 * FUNCTION:    AcpiDmCrossReferenceNamespace
 *
 * PARAMETERS:  ParseTreeRoot       - Root of the parse tree
 *              NamespaceRoot       - Root of the internal namespace
 *
 * RETURN:      None
 *
 * DESCRIPTION: Cross reference the namespace to create externals
 *
 ******************************************************************************/

void
AcpiDmCrossReferenceNamespace (
    ACPI_PARSE_OBJECT       *ParseTreeRoot,
    ACPI_NAMESPACE_NODE     *NamespaceRoot)
{
    ACPI_STATUS             Status;
    ACPI_OP_WALK_INFO       Info;
    ACPI_WALK_STATE         *WalkState;


    if (!ParseTreeRoot)
    {
        return;
    }

    /* Create and initialize a new walk state */

    WalkState = AcpiDsCreateWalkState (0, ParseTreeRoot, NULL, NULL);
    if (!WalkState)
    {
        return;
    }

    Status = AcpiDsScopeStackPush (NamespaceRoot, NamespaceRoot->Type, WalkState);
    if (ACPI_FAILURE (Status))
    {
        return;
    }

    Info.Flags = 0;
    Info.Level = 0;
    Info.WalkState = WalkState;
    AcpiDmWalkParseTree (ParseTreeRoot, AcpiDmXrefDescendingOp,
        AcpiDmCommonAscendingOp, &Info);
    ACPI_FREE (WalkState);
}


/*******************************************************************************
 *
 * FUNCTION:    AcpiDmConvertResourceIndexes
 *
 * PARAMETERS:  ParseTreeRoot       - Root of the parse tree
 *              NamespaceRoot       - Root of the internal namespace
 *
 * RETURN:      None
 *
 * DESCRIPTION: Convert fixed-offset references to resource descriptors to
 *              symbolic references. Should only be called after namespace has
 *              been cross referenced.
 *
 ******************************************************************************/

void
AcpiDmConvertResourceIndexes (
    ACPI_PARSE_OBJECT       *ParseTreeRoot,
    ACPI_NAMESPACE_NODE     *NamespaceRoot)
{
    ACPI_STATUS             Status;
    ACPI_OP_WALK_INFO       Info;
    ACPI_WALK_STATE         *WalkState;


    if (!ParseTreeRoot)
    {
        return;
    }

    /* Create and initialize a new walk state */

    WalkState = AcpiDsCreateWalkState (0, ParseTreeRoot, NULL, NULL);
    if (!WalkState)
    {
        return;
    }

    Status = AcpiDsScopeStackPush (NamespaceRoot, NamespaceRoot->Type, WalkState);
    if (ACPI_FAILURE (Status))
    {
        return;
    }

    Info.Flags = 0;
    Info.Level = 0;
    Info.WalkState = WalkState;
    AcpiDmWalkParseTree (ParseTreeRoot, AcpiDmResourceDescendingOp,
        AcpiDmCommonAscendingOp, &Info);
    ACPI_FREE (WalkState);
    return;
}


/*******************************************************************************
 *
 * FUNCTION:    AcpiDmDumpDescending
 *
 * PARAMETERS:  ASL_WALK_CALLBACK
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Format and print contents of one parse Op.
 *
 ******************************************************************************/

static ACPI_STATUS
AcpiDmDumpDescending (
    ACPI_PARSE_OBJECT       *Op,
    UINT32                  Level,
    void                    *Context)
{
    ACPI_OP_WALK_INFO       *Info = Context;
    const ACPI_OPCODE_INFO  *OpInfo;
    char                    *Path;


    if (!Op)
    {
        return (AE_OK);
    }

    OpInfo = AcpiPsGetOpcodeInfo (Op->Common.AmlOpcode);
    Info->Count++;

    /* Most of the information (count, level, name) here */

    AcpiOsPrintf ("% 5d [%2.2d] ", Info->Count, Level);
    AcpiDmIndent (Level);
    AcpiOsPrintf ("%-28s", AcpiPsGetOpcodeName (Op->Common.AmlOpcode));

    /* Extra info is helpful */

    switch (Op->Common.AmlOpcode)
    {
    case AML_BYTE_OP:
    case AML_WORD_OP:
    case AML_DWORD_OP:
        AcpiOsPrintf ("%X", (UINT32) Op->Common.Value.Integer);
        break;

    case AML_INT_NAMEPATH_OP:
        if (Op->Common.Value.String)
        {
            AcpiNsExternalizeName (ACPI_UINT32_MAX, Op->Common.Value.String,
                            NULL, &Path);
            AcpiOsPrintf ("%s %p", Path, Op->Common.Node);
            ACPI_FREE (Path);
        }
        else
        {
            AcpiOsPrintf ("[NULL]");
        }
        break;

    case AML_NAME_OP:
    case AML_METHOD_OP:
    case AML_DEVICE_OP:
    case AML_INT_NAMEDFIELD_OP:
        AcpiOsPrintf ("%4.4s", &Op->Named.Name);
        break;
    }

    AcpiOsPrintf ("\n");
    return (AE_OK);
}


/*******************************************************************************
 *
 * FUNCTION:    AcpiDmFindOrphanDescending
 *
 * PARAMETERS:  ASL_WALK_CALLBACK
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Check namepath Ops for orphaned method invocations
 *
 * Note: Experimental.
 *
 ******************************************************************************/

static ACPI_STATUS
AcpiDmFindOrphanDescending (
    ACPI_PARSE_OBJECT       *Op,
    UINT32                  Level,
    void                    *Context)
{
    const ACPI_OPCODE_INFO  *OpInfo;
    ACPI_PARSE_OBJECT       *ChildOp;