aslanalyze.c

acpi tools for linux include acpiexec and acpixtract

/******************************************************************************
 *
 * Module Name: aslanalyze.c - check for semantic errors
 *              $Revision: 1.118 $
 *
 *****************************************************************************/

/******************************************************************************
 *
 * 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 "aslcompiler.h"
#include "aslcompiler.y.h"
#include "acparser.h"
#include "amlcode.h"

#include <ctype.h>

#define _COMPONENT          ACPI_COMPILER
        ACPI_MODULE_NAME    ("aslanalyze")

/* Local prototypes */

static UINT32
AnMapArgTypeToBtype (
    UINT32                  ArgType);

static UINT32
AnMapEtypeToBtype (
    UINT32                  Etype);

static void
AnFormatBtype (
    char                    *Buffer,
    UINT32                  Btype);

static UINT32
AnGetBtype (
    ACPI_PARSE_OBJECT       *Op);

static UINT32
AnCheckForReservedName (
    ACPI_PARSE_OBJECT       *Op,
    char                    *Name);

static void
AnCheckForReservedMethod (
    ACPI_PARSE_OBJECT       *Op,
    ASL_METHOD_INFO         *MethodInfo);

static UINT32
AnMapObjTypeToBtype (
    ACPI_PARSE_OBJECT       *Op);

static BOOLEAN
AnLastStatementIsReturn (
    ACPI_PARSE_OBJECT       *Op);

static void
AnCheckMethodReturnValue (
    ACPI_PARSE_OBJECT       *Op,
    const ACPI_OPCODE_INFO  *OpInfo,
    ACPI_PARSE_OBJECT       *ArgOp,
    UINT32                  RequiredBtypes,
    UINT32                  ThisNodeBtype);

static BOOLEAN
AnIsInternalMethod (
    ACPI_PARSE_OBJECT       *Op);

static UINT32
AnGetInternalMethodReturnType (
    ACPI_PARSE_OBJECT       *Op);


/*******************************************************************************
 *
 * FUNCTION:    AnIsInternalMethod
 *
 * PARAMETERS:  Op              - Current op
 *
 * RETURN:      Boolean
 *
 * DESCRIPTION: Check for an internal control method.
 *
 ******************************************************************************/

static BOOLEAN
AnIsInternalMethod (
    ACPI_PARSE_OBJECT       *Op)
{

    if ((!ACPI_STRCMP (Op->Asl.ExternalName, "\\_OSI")) ||
        (!ACPI_STRCMP (Op->Asl.ExternalName, "_OSI")))
    {
        return (TRUE);
    }

    return (FALSE);
}


/*******************************************************************************
 *
 * FUNCTION:    AnGetInternalMethodReturnType
 *
 * PARAMETERS:  Op              - Current op
 *
 * RETURN:      Btype
 *
 * DESCRIPTION: Get the return type of an internal method
 *
 ******************************************************************************/

static UINT32
AnGetInternalMethodReturnType (
    ACPI_PARSE_OBJECT       *Op)
{

    if ((!ACPI_STRCMP (Op->Asl.ExternalName, "\\_OSI")) ||
        (!ACPI_STRCMP (Op->Asl.ExternalName, "_OSI")))
    {
        return (ACPI_BTYPE_STRING);
    }

    return (0);
}


/*******************************************************************************
 *
 * FUNCTION:    AnMapArgTypeToBtype
 *
 * PARAMETERS:  ArgType      - The ARGI required type(s) for this argument,
 *                             from the opcode info table
 *
 * RETURN:      The corresponding Bit-encoded types
 *
 * DESCRIPTION: Convert an encoded ARGI required argument type code into a
 *              bitfield type code. Implements the implicit source conversion
 *              rules.
 *
 ******************************************************************************/

static UINT32
AnMapArgTypeToBtype (
    UINT32                  ArgType)
{

    switch (ArgType)
    {

    /* Simple types */

    case ARGI_ANYTYPE:
        return (ACPI_BTYPE_OBJECTS_AND_REFS);

    case ARGI_PACKAGE:
        return (ACPI_BTYPE_PACKAGE);

    case ARGI_EVENT:
        return (ACPI_BTYPE_EVENT);

    case ARGI_MUTEX:
        return (ACPI_BTYPE_MUTEX);

    case ARGI_DDBHANDLE:
        /*
         * DDBHandleObject := SuperName
         * ACPI_BTYPE_REFERENCE: Index reference as parameter of Load/Unload
         */
        return (ACPI_BTYPE_DDB_HANDLE | ACPI_BTYPE_REFERENCE);

    /* Interchangeable types */
    /*
     * Source conversion rules:
     * Integer, String, and Buffer are all interchangeable
     */
    case ARGI_INTEGER:
    case ARGI_STRING:
    case ARGI_BUFFER:
    case ARGI_BUFFER_OR_STRING:
    case ARGI_COMPUTEDATA:
        return (ACPI_BTYPE_COMPUTE_DATA);

    /* References */

    case ARGI_INTEGER_REF:
        return (ACPI_BTYPE_INTEGER);

    case ARGI_OBJECT_REF:
        return (ACPI_BTYPE_ALL_OBJECTS);

    case ARGI_DEVICE_REF:
        return (ACPI_BTYPE_DEVICE_OBJECTS);

    case ARGI_REFERENCE:
        return (ACPI_BTYPE_REFERENCE);

    case ARGI_TARGETREF:
    case ARGI_FIXED_TARGET:
    case ARGI_SIMPLE_TARGET:
        return (ACPI_BTYPE_OBJECTS_AND_REFS);

    /* Complex types */

    case ARGI_DATAOBJECT:

        /*
         * Buffer, string, package or reference to a Op -
         * Used only by SizeOf operator
         */
        return (ACPI_BTYPE_STRING | ACPI_BTYPE_BUFFER |
            ACPI_BTYPE_PACKAGE | ACPI_BTYPE_REFERENCE);

    case ARGI_COMPLEXOBJ:

        /* Buffer, String, or package */

        return (ACPI_BTYPE_STRING | ACPI_BTYPE_BUFFER | ACPI_BTYPE_PACKAGE);

    case ARGI_REF_OR_STRING:
        return (ACPI_BTYPE_STRING | ACPI_BTYPE_REFERENCE);

    case ARGI_REGION_OR_BUFFER:

        /* Used by Load() only. Allow buffers in addition to regions/fields */

        return (ACPI_BTYPE_REGION | ACPI_BTYPE_BUFFER | ACPI_BTYPE_FIELD_UNIT);

    case ARGI_DATAREFOBJ:
        return (ACPI_BTYPE_INTEGER |ACPI_BTYPE_STRING | ACPI_BTYPE_BUFFER |
            ACPI_BTYPE_PACKAGE | ACPI_BTYPE_REFERENCE | ACPI_BTYPE_DDB_HANDLE);

    default:
        break;
    }

    return (ACPI_BTYPE_OBJECTS_AND_REFS);
}


/*******************************************************************************
 *
 * FUNCTION:    AnMapEtypeToBtype
 *
 * PARAMETERS:  Etype           - Encoded ACPI Type
 *
 * RETURN:      Btype corresponding to the Etype
 *
 * DESCRIPTION: Convert an encoded ACPI type to a bitfield type applying the
 *              operand conversion rules. In other words, returns the type(s)
 *              this Etype is implicitly converted to during interpretation.
 *
 ******************************************************************************/

static UINT32
AnMapEtypeToBtype (
    UINT32                  Etype)
{


    if (Etype == ACPI_TYPE_ANY)
    {
        return ACPI_BTYPE_OBJECTS_AND_REFS;
    }

    /* Try the standard ACPI data types */

    if (Etype <= ACPI_TYPE_EXTERNAL_MAX)
    {
        /*
         * This switch statement implements the allowed operand conversion
         * rules as per the "ASL Data Types" section of the ACPI
         * specification.
         */
        switch (Etype)
        {
        case ACPI_TYPE_INTEGER:
            return (ACPI_BTYPE_COMPUTE_DATA | ACPI_BTYPE_DDB_HANDLE);

        case ACPI_TYPE_STRING:
        case ACPI_TYPE_BUFFER:
            return (ACPI_BTYPE_COMPUTE_DATA);

        case ACPI_TYPE_PACKAGE:
            return (ACPI_BTYPE_PACKAGE);

        case ACPI_TYPE_FIELD_UNIT:
            return (ACPI_BTYPE_COMPUTE_DATA | ACPI_BTYPE_FIELD_UNIT);

        case ACPI_TYPE_BUFFER_FIELD:
            return (ACPI_BTYPE_COMPUTE_DATA | ACPI_BTYPE_BUFFER_FIELD);

        case ACPI_TYPE_DDB_HANDLE:
            return (ACPI_BTYPE_INTEGER | ACPI_BTYPE_DDB_HANDLE);

        case ACPI_BTYPE_DEBUG_OBJECT:

            /* Cannot be used as a source operand */

            return (0);

        default:
            return (1 << (Etype - 1));
        }
    }

    /* Try the internal data types */

    switch (Etype)
    {
    case ACPI_TYPE_LOCAL_REGION_FIELD:
    case ACPI_TYPE_LOCAL_BANK_FIELD:
    case ACPI_TYPE_LOCAL_INDEX_FIELD:

        /* Named fields can be either Integer/Buffer/String */

        return (ACPI_BTYPE_COMPUTE_DATA | ACPI_BTYPE_FIELD_UNIT);

    case ACPI_TYPE_LOCAL_ALIAS:

        return (ACPI_BTYPE_INTEGER);


    case ACPI_TYPE_LOCAL_RESOURCE:
    case ACPI_TYPE_LOCAL_RESOURCE_FIELD:

        return (ACPI_BTYPE_REFERENCE);

    default:
        printf ("Unhandled encoded type: %X\n", Etype);
        return (0);
    }
}