Subversion Repositories Kolibri OS

/******************************************************************************

 *

 * Module Name: aslwalks.c - major analytical parse tree walks

 *

 *****************************************************************************/

/******************************************************************************

 *

 * 1. Copyright Notice

 *

 * Some or all of this work - Copyright (c) 1999 - 2011, 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 "aslcompiler.h"

#include "aslcompiler.y.h"

#include "acparser.h"

#include "amlcode.h"

#define _COMPONENT          ACPI_COMPILER

        ACPI_MODULE_NAME    ("aslwalks")

/*******************************************************************************

 *

 * FUNCTION:    AnMethodAnalysisWalkBegin

 *

 * PARAMETERS:  ASL_WALK_CALLBACK

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Descending callback for the analysis walk. Check methods for:

 *              1) Initialized local variables

 *              2) Valid arguments

 *              3) Return types

 *

 ******************************************************************************/

ACPI_STATUS

AnMethodAnalysisWalkBegin (

    ACPI_PARSE_OBJECT       *Op,

    UINT32                  Level,

    void                    *Context)

{

    ASL_ANALYSIS_WALK_INFO  *WalkInfo = (ASL_ANALYSIS_WALK_INFO *) Context;

    ASL_METHOD_INFO         *MethodInfo = WalkInfo->MethodStack;

    ACPI_PARSE_OBJECT       *Next;

    UINT32                  RegisterNumber;

    UINT32                  i;

    char                    LocalName[] = "Local0";

    char                    ArgName[] = "Arg0";

    ACPI_PARSE_OBJECT       *ArgNode;

    ACPI_PARSE_OBJECT       *NextType;

    ACPI_PARSE_OBJECT       *NextParamType;

    UINT8                   ActualArgs = 0;

    switch (Op->Asl.ParseOpcode)

    {

    case PARSEOP_METHOD:

        TotalMethods++;

        /* Create and init method info */

        MethodInfo       = UtLocalCalloc (sizeof (ASL_METHOD_INFO));

        MethodInfo->Next = WalkInfo->MethodStack;

        MethodInfo->Op = Op;

        WalkInfo->MethodStack = MethodInfo;

        /* Get the name node, ignored here */

        Next = Op->Asl.Child;

        /* Get the NumArguments node */

        Next = Next->Asl.Next;

        MethodInfo->NumArguments = (UINT8)

            (((UINT8) Next->Asl.Value.Integer) & 0x07);

        /* Get the SerializeRule and SyncLevel nodes, ignored here */

        Next = Next->Asl.Next;

        Next = Next->Asl.Next;

        ArgNode = Next;

        /* Get the ReturnType node */

        Next = Next->Asl.Next;

        NextType = Next->Asl.Child;

        while (NextType)

        {

            /* Get and map each of the ReturnTypes */

            MethodInfo->ValidReturnTypes |= AnMapObjTypeToBtype (NextType);

            NextType->Asl.ParseOpcode = PARSEOP_DEFAULT_ARG;

            NextType = NextType->Asl.Next;

        }

        /* Get the ParameterType node */

        Next = Next->Asl.Next;

        NextType = Next->Asl.Child;

        while (NextType)

        {

            if (NextType->Asl.ParseOpcode == PARSEOP_DEFAULT_ARG)

            {

                NextParamType = NextType->Asl.Child;

                while (NextParamType)

                {

                    MethodInfo->ValidArgTypes[ActualArgs] |= AnMapObjTypeToBtype (NextParamType);

                    NextParamType->Asl.ParseOpcode = PARSEOP_DEFAULT_ARG;

                    NextParamType = NextParamType->Asl.Next;

                }

            }

            else

            {

                MethodInfo->ValidArgTypes[ActualArgs] =

                    AnMapObjTypeToBtype (NextType);

                NextType->Asl.ParseOpcode = PARSEOP_DEFAULT_ARG;

                ActualArgs++;

            }

            NextType = NextType->Asl.Next;

        }

        if ((MethodInfo->NumArguments) &&

            (MethodInfo->NumArguments != ActualArgs))

        {

            /* error: Param list did not match number of args */

        }

        /* Allow numarguments == 0 for Function() */

        if ((!MethodInfo->NumArguments) && (ActualArgs))

        {

            MethodInfo->NumArguments = ActualArgs;

            ArgNode->Asl.Value.Integer |= ActualArgs;

        }

        /*

         * Actual arguments are initialized at method entry.

         * All other ArgX "registers" can be used as locals, so we

         * track their initialization.

         */

        for (i = 0; i < MethodInfo->NumArguments; i++)

        {

            MethodInfo->ArgInitialized[i] = TRUE;

        }

        break;

    case PARSEOP_METHODCALL:

        if (MethodInfo &&

           (Op->Asl.Node == MethodInfo->Op->Asl.Node))

        {

            AslError (ASL_REMARK, ASL_MSG_RECURSION, Op, Op->Asl.ExternalName);

        }

        break;

    case PARSEOP_LOCAL0:

    case PARSEOP_LOCAL1:

    case PARSEOP_LOCAL2:

    case PARSEOP_LOCAL3:

    case PARSEOP_LOCAL4:

    case PARSEOP_LOCAL5:

    case PARSEOP_LOCAL6:

    case PARSEOP_LOCAL7:

        if (!MethodInfo)

        {

            /*

             * Local was used outside a control method, or there was an error

             * in the method declaration.

             */

            AslError (ASL_REMARK, ASL_MSG_LOCAL_OUTSIDE_METHOD, Op, Op->Asl.ExternalName);

            return (AE_ERROR);

        }

        RegisterNumber = (Op->Asl.AmlOpcode & 0x000F);

        /*

         * If the local is being used as a target, mark the local

         * initialized

         */

        if (Op->Asl.CompileFlags & NODE_IS_TARGET)

        {

            MethodInfo->LocalInitialized[RegisterNumber] = TRUE;

        }

        /*

         * Otherwise, this is a reference, check if the local

         * has been previously initialized.

         *

         * The only operator that accepts an uninitialized value is ObjectType()

         */

        else if ((!MethodInfo->LocalInitialized[RegisterNumber]) &&

                 (Op->Asl.Parent->Asl.ParseOpcode != PARSEOP_OBJECTTYPE))

        {

            LocalName[strlen (LocalName) -1] = (char) (RegisterNumber + 0x30);

            AslError (ASL_ERROR, ASL_MSG_LOCAL_INIT, Op, LocalName);

        }

        break;

    case PARSEOP_ARG0:

    case PARSEOP_ARG1:

    case PARSEOP_ARG2:

    case PARSEOP_ARG3:

    case PARSEOP_ARG4:

    case PARSEOP_ARG5:

    case PARSEOP_ARG6:

        if (!MethodInfo)

        {

            /*

             * Arg was used outside a control method, or there was an error

             * in the method declaration.

             */

            AslError (ASL_REMARK, ASL_MSG_LOCAL_OUTSIDE_METHOD, Op, Op->Asl.ExternalName);

            return (AE_ERROR);

        }

        RegisterNumber = (Op->Asl.AmlOpcode & 0x000F) - 8;

        ArgName[strlen (ArgName) -1] = (char) (RegisterNumber + 0x30);

        /*

         * If the Arg is being used as a target, mark the local

         * initialized

         */

        if (Op->Asl.CompileFlags & NODE_IS_TARGET)

        {

            MethodInfo->ArgInitialized[RegisterNumber] = TRUE;

        }

        /*

         * Otherwise, this is a reference, check if the Arg

         * has been previously initialized.

         *

         * The only operator that accepts an uninitialized value is ObjectType()

         */

        else if ((!MethodInfo->ArgInitialized[RegisterNumber]) &&

                 (Op->Asl.Parent->Asl.ParseOpcode != PARSEOP_OBJECTTYPE))

        {

            AslError (ASL_ERROR, ASL_MSG_ARG_INIT, Op, ArgName);

        }

        /* Flag this arg if it is not a "real" argument to the method */

        if (RegisterNumber >= MethodInfo->NumArguments)

        {

            AslError (ASL_REMARK, ASL_MSG_NOT_PARAMETER, Op, ArgName);

        }

        break;

    case PARSEOP_RETURN:

        if (!MethodInfo)

        {

            /*

             * Probably was an error in the method declaration,

             * no additional error here

             */

            ACPI_WARNING ((AE_INFO, "%p, No parent method", Op));

            return (AE_ERROR);

        }

        /*

         * A child indicates a possible return value. A simple Return or

         * Return() is marked with NODE_IS_NULL_RETURN by the parser so

         * that it is not counted as a "real" return-with-value, although

         * the AML code that is actually emitted is Return(0). The AML

         * definition of Return has a required parameter, so we are

         * forced to convert a null return to Return(0).

         */

        if ((Op->Asl.Child) &&

            (Op->Asl.Child->Asl.ParseOpcode != PARSEOP_DEFAULT_ARG) &&

            (!(Op->Asl.Child->Asl.CompileFlags & NODE_IS_NULL_RETURN)))

        {

            MethodInfo->NumReturnWithValue++;

        }

        else

        {

            MethodInfo->NumReturnNoValue++;

        }

        break;

    case PARSEOP_BREAK:

    case PARSEOP_CONTINUE:

        Next = Op->Asl.Parent;

        while (Next)

        {

            if (Next->Asl.ParseOpcode == PARSEOP_WHILE)

            {

                break;

            }

            Next = Next->Asl.Parent;

        }

        if (!Next)

        {

            AslError (ASL_ERROR, ASL_MSG_NO_WHILE, Op, NULL);

        }

        break;

    case PARSEOP_STALL:

        /* We can range check if the argument is an integer */

        if ((Op->Asl.Child->Asl.ParseOpcode == PARSEOP_INTEGER) &&

            (Op->Asl.Child->Asl.Value.Integer > ACPI_UINT8_MAX))

        {

            AslError (ASL_ERROR, ASL_MSG_INVALID_TIME, Op, NULL);

        }

        break;

    case PARSEOP_DEVICE:

    case PARSEOP_EVENT:

    case PARSEOP_MUTEX:

    case PARSEOP_OPERATIONREGION:

    case PARSEOP_POWERRESOURCE:

    case PARSEOP_PROCESSOR:

    case PARSEOP_THERMALZONE:

        /*

         * The first operand is a name to be created in the namespace.

         * Check against the reserved list.

         */

        i = ApCheckForPredefinedName (Op, Op->Asl.NameSeg);

        if (i < ACPI_VALID_RESERVED_NAME_MAX)

        {

            AslError (ASL_ERROR, ASL_MSG_RESERVED_USE, Op, Op->Asl.ExternalName);

        }

        break;

    case PARSEOP_NAME:

        /* Typecheck any predefined names statically defined with Name() */

        ApCheckForPredefinedObject (Op, Op->Asl.NameSeg);

        /* Special typechecking for _HID */

        if (!ACPI_STRCMP (METHOD_NAME__HID, Op->Asl.NameSeg))

        {

            Next = Op->Asl.Child->Asl.Next;

            AnCheckId (Next, ASL_TYPE_HID);

        }

        /* Special typechecking for _CID */

        else if (!ACPI_STRCMP (METHOD_NAME__CID, Op->Asl.NameSeg))

        {

            Next = Op->Asl.Child->Asl.Next;

            if ((Next->Asl.ParseOpcode == PARSEOP_PACKAGE) ||

                (Next->Asl.ParseOpcode == PARSEOP_VAR_PACKAGE))

            {

                Next = Next->Asl.Child;

                while (Next)

                {

                    AnCheckId (Next, ASL_TYPE_CID);

                    Next = Next->Asl.Next;

                }

            }

            else

            {

                AnCheckId (Next, ASL_TYPE_CID);

            }

        }

        break;

    default:

        break;

    }

    return (AE_OK);

}

/*******************************************************************************

 *

 * FUNCTION:    AnMethodAnalysisWalkEnd

 *

 * PARAMETERS:  ASL_WALK_CALLBACK

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Ascending callback for analysis walk. Complete method

 *              return analysis.

 *

 ******************************************************************************/

ACPI_STATUS

AnMethodAnalysisWalkEnd (

    ACPI_PARSE_OBJECT       *Op,

    UINT32                  Level,

    void                    *Context)

{

    ASL_ANALYSIS_WALK_INFO  *WalkInfo = (ASL_ANALYSIS_WALK_INFO *) Context;

    ASL_METHOD_INFO         *MethodInfo = WalkInfo->MethodStack;

    switch (Op->Asl.ParseOpcode)

    {

    case PARSEOP_METHOD:

    case PARSEOP_RETURN:

        if (!MethodInfo)

        {

            printf ("No method info for method! [%s]\n", Op->Asl.Namepath);

            AslError (ASL_ERROR, ASL_MSG_COMPILER_INTERNAL, Op,

                "No method info for this method");

            CmCleanupAndExit ();

            return (AE_AML_INTERNAL);

        }

        break;

    default:

        break;

    }

    switch (Op->Asl.ParseOpcode)

    {

    case PARSEOP_METHOD:

        WalkInfo->MethodStack = MethodInfo->Next;

        /*

         * Check if there is no return statement at the end of the

         * method AND we can actually get there -- i.e., the execution

         * of the method can possibly terminate without a return statement.

         */

        if ((!AnLastStatementIsReturn (Op)) &&

            (!(Op->Asl.CompileFlags & NODE_HAS_NO_EXIT)))

        {

            /*

             * No return statement, and execution can possibly exit

             * via this path. This is equivalent to Return ()

             */

            MethodInfo->NumReturnNoValue++;

        }

        /*

         * Check for case where some return statements have a return value

         * and some do not. Exit without a return statement is a return with

         * no value

         */

        if (MethodInfo->NumReturnNoValue &&

            MethodInfo->NumReturnWithValue)

        {

            AslError (ASL_WARNING, ASL_MSG_RETURN_TYPES, Op,

                Op->Asl.ExternalName);

        }

        /*

         * If there are any RETURN() statements with no value, or there is a

         * control path that allows the method to exit without a return value,

         * we mark the method as a method that does not return a value. This

         * knowledge can be used to check method invocations that expect a

         * returned value.

         */

        if (MethodInfo->NumReturnNoValue)

        {

            if (MethodInfo->NumReturnWithValue)

            {

                Op->Asl.CompileFlags |= NODE_METHOD_SOME_NO_RETVAL;

            }

            else

            {

                Op->Asl.CompileFlags |= NODE_METHOD_NO_RETVAL;

            }

        }

        /*

         * Check predefined method names for correct return behavior

         * and correct number of arguments. Also, some special checks

         * For GPE and _REG methods.

         */

        if (ApCheckForPredefinedMethod (Op, MethodInfo))

        {

            /* Special check for two names like _L01 and _E01 in same scope */

            ApCheckForGpeNameConflict (Op);

            /*

             * Special check for _REG: Must have an operation region definition

             * within the same scope!

             */

            ApCheckRegMethod (Op);

        }

        ACPI_FREE (MethodInfo);

        break;

    case PARSEOP_NAME:

         /* Special check for two names like _L01 and _E01 in same scope */

        ApCheckForGpeNameConflict (Op);

        break;

    case PARSEOP_RETURN:

        /*

         * If the parent is a predefined method name, attempt to typecheck

         * the return value. Only static types can be validated.

         */

        ApCheckPredefinedReturnValue (Op, MethodInfo);

        /*

         * The parent block does not "exit" and continue execution -- the

         * method is terminated here with the Return() statement.

         */

        Op->Asl.Parent->Asl.CompileFlags |= NODE_HAS_NO_EXIT;

        /* Used in the "typing" pass later */

        Op->Asl.ParentMethod = MethodInfo->Op;

        /*

         * If there is a peer node after the return statement, then this

         * node is unreachable code -- i.e., it won't be executed because of

         * the preceeding Return() statement.

         */

        if (Op->Asl.Next)

        {

            AslError (ASL_WARNING, ASL_MSG_UNREACHABLE_CODE, Op->Asl.Next, NULL);

        }

        break;

    case PARSEOP_IF:

        if ((Op->Asl.CompileFlags & NODE_HAS_NO_EXIT) &&

            (Op->Asl.Next) &&

            (Op->Asl.Next->Asl.ParseOpcode == PARSEOP_ELSE))

        {

            /*

             * This IF has a corresponding ELSE. The IF block has no exit,

             * (it contains an unconditional Return)

             * mark the ELSE block to remember this fact.

             */

            Op->Asl.Next->Asl.CompileFlags |= NODE_IF_HAS_NO_EXIT;

        }

        break;

    case PARSEOP_ELSE:

        if ((Op->Asl.CompileFlags & NODE_HAS_NO_EXIT) &&

            (Op->Asl.CompileFlags & NODE_IF_HAS_NO_EXIT))

        {

            /*

             * This ELSE block has no exit and the corresponding IF block

             * has no exit either. Therefore, the parent node has no exit.

             */

            Op->Asl.Parent->Asl.CompileFlags |= NODE_HAS_NO_EXIT;

        }

        break;

    default:

        if ((Op->Asl.CompileFlags & NODE_HAS_NO_EXIT) &&

            (Op->Asl.Parent))

        {

            /* If this node has no exit, then the parent has no exit either */

            Op->Asl.Parent->Asl.CompileFlags |= NODE_HAS_NO_EXIT;

        }

        break;

    }

    return (AE_OK);

}

/*******************************************************************************

 *

 * FUNCTION:    AnMethodTypingWalkEnd

 *

 * PARAMETERS:  ASL_WALK_CALLBACK

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Ascending callback for typing walk. Complete the method

 *              return analysis. Check methods for:

 *              1) Initialized local variables

 *              2) Valid arguments

 *              3) Return types

 *

 ******************************************************************************/

ACPI_STATUS

AnMethodTypingWalkEnd (

    ACPI_PARSE_OBJECT       *Op,

    UINT32                  Level,

    void                    *Context)

{

    UINT32                  ThisNodeBtype;

    switch (Op->Asl.ParseOpcode)

    {

    case PARSEOP_METHOD:

        Op->Asl.CompileFlags |= NODE_METHOD_TYPED;

        break;

    case PARSEOP_RETURN:

        if ((Op->Asl.Child) &&

            (Op->Asl.Child->Asl.ParseOpcode != PARSEOP_DEFAULT_ARG))

        {

            ThisNodeBtype = AnGetBtype (Op->Asl.Child);

            if ((Op->Asl.Child->Asl.ParseOpcode == PARSEOP_METHODCALL) &&

                (ThisNodeBtype == (ACPI_UINT32_MAX -1)))

            {

                /*

                 * The called method is untyped at this time (typically a

                 * forward reference).

                 *

                 * Check for a recursive method call first.

                 */

                if (Op->Asl.ParentMethod != Op->Asl.Child->Asl.Node->Op)

                {

                    /* We must type the method here */

                    TrWalkParseTree (Op->Asl.Child->Asl.Node->Op,

                        ASL_WALK_VISIT_UPWARD, NULL,

                        AnMethodTypingWalkEnd, NULL);

                    ThisNodeBtype = AnGetBtype (Op->Asl.Child);

                }

            }

            /* Returns a value, save the value type */

            if (Op->Asl.ParentMethod)

            {

                Op->Asl.ParentMethod->Asl.AcpiBtype |= ThisNodeBtype;

            }

        }

        break;

    default:

        break;

    }

    return (AE_OK);

}

/*******************************************************************************

 *

 * FUNCTION:    AnOperandTypecheckWalkEnd

 *

 * PARAMETERS:  ASL_WALK_CALLBACK

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Ascending callback for analysis walk. Complete method

 *              return analysis.

 *

 ******************************************************************************/

ACPI_STATUS

AnOperandTypecheckWalkEnd (

    ACPI_PARSE_OBJECT       *Op,

    UINT32                  Level,

    void                    *Context)

{

    const ACPI_OPCODE_INFO  *OpInfo;

    UINT32                  RuntimeArgTypes;

    UINT32                  RuntimeArgTypes2;

    UINT32                  RequiredBtypes;

    UINT32                  ThisNodeBtype;

    UINT32                  CommonBtypes;

    UINT32                  OpcodeClass;

    ACPI_PARSE_OBJECT       *ArgOp;

    UINT32                  ArgType;

    switch (Op->Asl.AmlOpcode)

    {

    case AML_RAW_DATA_BYTE:

    case AML_RAW_DATA_WORD:

    case AML_RAW_DATA_DWORD:

    case AML_RAW_DATA_QWORD:

    case AML_RAW_DATA_BUFFER:

    case AML_RAW_DATA_CHAIN:

    case AML_PACKAGE_LENGTH:

    case AML_UNASSIGNED_OPCODE:

    case AML_DEFAULT_ARG_OP:

        /* Ignore the internal (compiler-only) AML opcodes */

        return (AE_OK);

    default:

        break;

    }

    OpInfo = AcpiPsGetOpcodeInfo (Op->Asl.AmlOpcode);

    if (!OpInfo)

    {

        return (AE_OK);

    }

    ArgOp           = Op->Asl.Child;

    RuntimeArgTypes = OpInfo->RuntimeArgs;

    OpcodeClass     = OpInfo->Class;

#ifdef ASL_ERROR_NAMED_OBJECT_IN_WHILE

    /*

     * Update 11/2008: In practice, we can't perform this check. A simple

     * analysis is not sufficient. Also, it can cause errors when compiling

     * disassembled code because of the way Switch operators are implemented

     * (a While(One) loop with a named temp variable created within.)

     */

    /*

     * If we are creating a named object, check if we are within a while loop

     * by checking if the parent is a WHILE op. This is a simple analysis, but

     * probably sufficient for many cases.

     *

     * Allow Scope(), Buffer(), and Package().

     */

    if (((OpcodeClass == AML_CLASS_NAMED_OBJECT) && (Op->Asl.AmlOpcode != AML_SCOPE_OP)) ||

        ((OpcodeClass == AML_CLASS_CREATE) && (OpInfo->Flags & AML_NSNODE)))

    {

        if (Op->Asl.Parent->Asl.AmlOpcode == AML_WHILE_OP)

        {

            AslError (ASL_ERROR, ASL_MSG_NAMED_OBJECT_IN_WHILE, Op, NULL);

        }

    }

#endif

    /*

     * Special case for control opcodes IF/RETURN/WHILE since they

     * have no runtime arg list (at this time)

     */

    switch (Op->Asl.AmlOpcode)

    {

    case AML_IF_OP:

    case AML_WHILE_OP:

    case AML_RETURN_OP:

        if (ArgOp->Asl.ParseOpcode == PARSEOP_METHODCALL)

        {

            /* Check for an internal method */

            if (AnIsInternalMethod (ArgOp))

            {

                return (AE_OK);

            }

            /* The lone arg is a method call, check it */

            RequiredBtypes = AnMapArgTypeToBtype (ARGI_INTEGER);

            if (Op->Asl.AmlOpcode == AML_RETURN_OP)

            {

                RequiredBtypes = 0xFFFFFFFF;

            }

            ThisNodeBtype = AnGetBtype (ArgOp);

            if (ThisNodeBtype == ACPI_UINT32_MAX)

            {

                return (AE_OK);

            }

            AnCheckMethodReturnValue (Op, OpInfo, ArgOp,

                RequiredBtypes, ThisNodeBtype);

        }

        return (AE_OK);

    default:

        break;

    }

    /* Ignore the non-executable opcodes */

    if (RuntimeArgTypes == ARGI_INVALID_OPCODE)

    {

        return (AE_OK);

    }

    switch (OpcodeClass)

    {

    case AML_CLASS_EXECUTE:

    case AML_CLASS_CREATE:

    case AML_CLASS_CONTROL:

    case AML_CLASS_RETURN_VALUE:

        /* TBD: Change class or fix typechecking for these */

        if ((Op->Asl.AmlOpcode == AML_BUFFER_OP)        ||

            (Op->Asl.AmlOpcode == AML_PACKAGE_OP)       ||

            (Op->Asl.AmlOpcode == AML_VAR_PACKAGE_OP))

        {

            break;

        }

        /* Reverse the runtime argument list */

        RuntimeArgTypes2 = 0;

        while ((ArgType = GET_CURRENT_ARG_TYPE (RuntimeArgTypes)))

        {

            RuntimeArgTypes2 <<= ARG_TYPE_WIDTH;

            RuntimeArgTypes2 |= ArgType;

            INCREMENT_ARG_LIST (RuntimeArgTypes);

        }

        while ((ArgType = GET_CURRENT_ARG_TYPE (RuntimeArgTypes2)))

        {

            RequiredBtypes = AnMapArgTypeToBtype (ArgType);

            ThisNodeBtype = AnGetBtype (ArgOp);

            if (ThisNodeBtype == ACPI_UINT32_MAX)

            {

                goto NextArgument;

            }

            /* Examine the arg based on the required type of the arg */

            switch (ArgType)

            {

            case ARGI_TARGETREF:

                if (ArgOp->Asl.ParseOpcode == PARSEOP_ZERO)

                {

                    /* ZERO is the placeholder for "don't store result" */

                    ThisNodeBtype = RequiredBtypes;

                    break;

                }

                if (ArgOp->Asl.ParseOpcode == PARSEOP_INTEGER)

                {

                    /*

                     * This is the case where an original reference to a resource

                     * descriptor field has been replaced by an (Integer) offset.

                     * These named fields are supported at compile-time only;

                     * the names are not passed to the interpreter (via the AML).

                     */

                    if ((ArgOp->Asl.Node->Type == ACPI_TYPE_LOCAL_RESOURCE_FIELD) ||

                        (ArgOp->Asl.Node->Type == ACPI_TYPE_LOCAL_RESOURCE))

                    {

                        AslError (ASL_ERROR, ASL_MSG_RESOURCE_FIELD, ArgOp, NULL);

                    }

                    else

                    {

                        AslError (ASL_ERROR, ASL_MSG_INVALID_TYPE, ArgOp, NULL);

                    }

                    break;

                }

                if ((ArgOp->Asl.ParseOpcode == PARSEOP_METHODCALL) ||

                    (ArgOp->Asl.ParseOpcode == PARSEOP_DEREFOF))

                {

                    break;

                }

                ThisNodeBtype = RequiredBtypes;

                break;

            case ARGI_REFERENCE:            /* References */

            case ARGI_INTEGER_REF:

            case ARGI_OBJECT_REF:

            case ARGI_DEVICE_REF:

                switch (ArgOp->Asl.ParseOpcode)

                {

                case PARSEOP_LOCAL0:

                case PARSEOP_LOCAL1:

                case PARSEOP_LOCAL2:

                case PARSEOP_LOCAL3:

                case PARSEOP_LOCAL4:

                case PARSEOP_LOCAL5:

                case PARSEOP_LOCAL6:

                case PARSEOP_LOCAL7:

                    /* TBD: implement analysis of current value (type) of the local */

                    /* For now, just treat any local as a typematch */

                    /*ThisNodeBtype = RequiredBtypes;*/

                    break;

                case PARSEOP_ARG0:

                case PARSEOP_ARG1:

                case PARSEOP_ARG2:

                case PARSEOP_ARG3:

                case PARSEOP_ARG4:

                case PARSEOP_ARG5:

                case PARSEOP_ARG6:

                    /* Hard to analyze argument types, sow we won't */

                    /* For now, just treat any arg as a typematch */

                    /* ThisNodeBtype = RequiredBtypes; */

                    break;

                case PARSEOP_DEBUG:

                    break;

                case PARSEOP_REFOF:

                case PARSEOP_INDEX:

                default:

                    break;

                }

                break;

            case ARGI_INTEGER:

            default:

                break;

            }

            CommonBtypes = ThisNodeBtype & RequiredBtypes;

            if (ArgOp->Asl.ParseOpcode == PARSEOP_METHODCALL)

            {

                if (AnIsInternalMethod (ArgOp))

                {

                    return (AE_OK);

                }

                /* Check a method call for a valid return value */

                AnCheckMethodReturnValue (Op, OpInfo, ArgOp,

                    RequiredBtypes, ThisNodeBtype);

            }

            /*

             * Now check if the actual type(s) match at least one

             * bit to the required type

             */

            else if (!CommonBtypes)

            {

                /* No match -- this is a type mismatch error */

                AnFormatBtype (StringBuffer, ThisNodeBtype);

                AnFormatBtype (StringBuffer2, RequiredBtypes);

                sprintf (MsgBuffer, "[%s] found, %s operator requires [%s]",

                            StringBuffer, OpInfo->Name, StringBuffer2);

                AslError (ASL_ERROR, ASL_MSG_INVALID_TYPE, ArgOp, MsgBuffer);

            }

        NextArgument:

            ArgOp = ArgOp->Asl.Next;

            INCREMENT_ARG_LIST (RuntimeArgTypes2);

        }

        break;

    default:

        break;

    }

    return (AE_OK);

}

/*******************************************************************************

 *

 * FUNCTION:    AnOtherSemanticAnalysisWalkBegin

 *

 * PARAMETERS:  ASL_WALK_CALLBACK

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Descending callback for the analysis walk. Checks for

 *              miscellaneous issues in the code.

 *

 ******************************************************************************/

ACPI_STATUS

AnOtherSemanticAnalysisWalkBegin (

    ACPI_PARSE_OBJECT       *Op,

    UINT32                  Level,

    void                    *Context)

{

    ACPI_PARSE_OBJECT       *ArgNode;

    ACPI_PARSE_OBJECT       *PrevArgNode = NULL;

    const ACPI_OPCODE_INFO  *OpInfo;

    OpInfo = AcpiPsGetOpcodeInfo (Op->Asl.AmlOpcode);

    /*

     * Determine if an execution class operator actually does something by

     * checking if it has a target and/or the function return value is used.

     * (Target is optional, so a standalone statement can actually do nothing.)

     */

    if ((OpInfo->Class == AML_CLASS_EXECUTE) &&

        (OpInfo->Flags & AML_HAS_RETVAL) &&

        (!AnIsResultUsed (Op)))

    {

        if (OpInfo->Flags & AML_HAS_TARGET)

        {

            /*

             * Find the target node, it is always the last child. If the traget

             * is not specified in the ASL, a default node of type Zero was

             * created by the parser.

             */

            ArgNode = Op->Asl.Child;

            while (ArgNode->Asl.Next)

            {

                PrevArgNode = ArgNode;