FreeBSD/Linux Kernel Cross Reference
sys/contrib/dev/acpica/components/namespace/nsprepkg.c

     /******************************************************************************
      *
      * Module Name: nsprepkg - Validation of package objects for predefined names
      *
      *****************************************************************************/
     
     /******************************************************************************
      *
      * 1. Copyright Notice
     *
     * Some or all of this work - Copyright (c) 1999 - 2022, 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.
    *
    *****************************************************************************
    *
    * Alternatively, you may choose to be licensed under the terms of the
    * following license:
    *
    * Redistribution and use in source and binary forms, with or without
    * modification, are permitted provided that the following conditions
    * are met:
    * 1. Redistributions of source code must retain the above copyright
    *    notice, this list of conditions, and the following disclaimer,
    *    without modification.
    * 2. Redistributions in binary form must reproduce at minimum a disclaimer
    *    substantially similar to the "NO WARRANTY" disclaimer below
    *    ("Disclaimer") and any redistribution must be conditioned upon
    *    including a substantially similar Disclaimer requirement for further
    *    binary redistribution.
    * 3. Neither the names of the above-listed copyright holders nor the names
    *    of any contributors may be used to endorse or promote products derived
    *    from this software without specific prior written permission.
    *
    * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
    * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
    * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
    * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
    * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
    * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
    * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
    * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
    * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
    * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
    * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
    *
    * Alternatively, you may choose to be licensed under the terms of the
    * GNU General Public License ("GPL") version 2 as published by the Free
    * Software Foundation.
    *
    *****************************************************************************/
   
   #include <contrib/dev/acpica/include/acpi.h>
   #include <contrib/dev/acpica/include/accommon.h>
   #include <contrib/dev/acpica/include/acnamesp.h>
   #include <contrib/dev/acpica/include/acpredef.h>
   
   
   #define _COMPONENT          ACPI_NAMESPACE
           ACPI_MODULE_NAME    ("nsprepkg")
   
   
   /* Local prototypes */
   
   static ACPI_STATUS
   AcpiNsCheckPackageList (
       ACPI_EVALUATE_INFO          *Info,
       const ACPI_PREDEFINED_INFO  *Package,
       ACPI_OPERAND_OBJECT         **Elements,
       UINT32                      Count);
   
   static ACPI_STATUS
   AcpiNsCheckPackageElements (
       ACPI_EVALUATE_INFO          *Info,
       ACPI_OPERAND_OBJECT         **Elements,
       UINT8                       Type1,
       UINT32                      Count1,
       UINT8                       Type2,
       UINT32                      Count2,
       UINT32                      StartIndex);
   
   static ACPI_STATUS
   AcpiNsCustomPackage (
       ACPI_EVALUATE_INFO          *Info,
       ACPI_OPERAND_OBJECT         **Elements,
       UINT32                      Count);
   
   
   /*******************************************************************************
    *
    * FUNCTION:    AcpiNsCheckPackage
    *
    * PARAMETERS:  Info                - Method execution information block
    *              ReturnObjectPtr     - Pointer to the object returned from the
    *                                    evaluation of a method or object
    *
    * RETURN:      Status
    *
    * DESCRIPTION: Check a returned package object for the correct count and
    *              correct type of all sub-objects.
    *
    ******************************************************************************/
   
   ACPI_STATUS
   AcpiNsCheckPackage (
       ACPI_EVALUATE_INFO          *Info,
       ACPI_OPERAND_OBJECT         **ReturnObjectPtr)
   {
       ACPI_OPERAND_OBJECT         *ReturnObject = *ReturnObjectPtr;
       const ACPI_PREDEFINED_INFO  *Package;
       ACPI_OPERAND_OBJECT         **Elements;
       ACPI_STATUS                 Status = AE_OK;
       UINT32                      ExpectedCount;
       UINT32                      Count;
       UINT32                      i;
   
   
       ACPI_FUNCTION_TRACE (NsCheckPackage);
   
   
       /* The package info for this name is in the next table entry */
   
       Package = Info->Predefined + 1;
   
       ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
           "%s Validating return Package of Type %X, Count %X\n",
           Info->FullPathname, Package->RetInfo.Type,
           ReturnObject->Package.Count));
   
       /*
        * For variable-length Packages, we can safely remove all embedded
        * and trailing NULL package elements
        */
       AcpiNsRemoveNullElements (Info, Package->RetInfo.Type, ReturnObject);
   
       /* Extract package count and elements array */
   
       Elements = ReturnObject->Package.Elements;
       Count = ReturnObject->Package.Count;
   
       /*
        * Most packages must have at least one element. The only exception
        * is the variable-length package (ACPI_PTYPE1_VAR).
        */
       if (!Count)
       {
           if (Package->RetInfo.Type == ACPI_PTYPE1_VAR)
           {
               return_ACPI_STATUS (AE_OK);
           }
   
           ACPI_WARN_PREDEFINED ((AE_INFO, Info->FullPathname, Info->NodeFlags,
               "Return Package has no elements (empty)"));
   
           return_ACPI_STATUS (AE_AML_OPERAND_VALUE);
       }
   
       /*
        * Decode the type of the expected package contents
        *
        * PTYPE1 packages contain no subpackages
        * PTYPE2 packages contain subpackages
        */
       switch (Package->RetInfo.Type)
       {
       case ACPI_PTYPE_CUSTOM:
   
           Status = AcpiNsCustomPackage (Info, Elements, Count);
           break;
   
       case ACPI_PTYPE1_FIXED:
           /*
            * The package count is fixed and there are no subpackages
            *
            * If package is too small, exit.
            * If package is larger than expected, issue warning but continue
            */
           ExpectedCount = Package->RetInfo.Count1 + Package->RetInfo.Count2;
           if (Count < ExpectedCount)
           {
               goto PackageTooSmall;
           }
           else if (Count > ExpectedCount)
           {
               ACPI_DEBUG_PRINT ((ACPI_DB_REPAIR,
                   "%s: Return Package is larger than needed - "
                   "found %u, expected %u\n",
                   Info->FullPathname, Count, ExpectedCount));
           }
   
           /* Validate all elements of the returned package */
   
           Status = AcpiNsCheckPackageElements (Info, Elements,
               Package->RetInfo.ObjectType1, Package->RetInfo.Count1,
               Package->RetInfo.ObjectType2, Package->RetInfo.Count2, 0);
           break;
   
       case ACPI_PTYPE1_VAR:
           /*
            * The package count is variable, there are no subpackages, and all
            * elements must be of the same type
            */
           for (i = 0; i < Count; i++)
           {
               Status = AcpiNsCheckObjectType (Info, Elements,
                   Package->RetInfo.ObjectType1, i);
               if (ACPI_FAILURE (Status))
               {
                   return_ACPI_STATUS (Status);
               }
   
               Elements++;
           }
           break;
   
       case ACPI_PTYPE1_OPTION:
           /*
            * The package count is variable, there are no subpackages. There are
            * a fixed number of required elements, and a variable number of
            * optional elements.
            *
            * Check if package is at least as large as the minimum required
            */
           ExpectedCount = Package->RetInfo3.Count;
           if (Count < ExpectedCount)
           {
               goto PackageTooSmall;
           }
   
           /* Variable number of sub-objects */
   
           for (i = 0; i < Count; i++)
           {
               if (i < Package->RetInfo3.Count)
               {
                   /* These are the required package elements (0, 1, or 2) */
   
                   Status = AcpiNsCheckObjectType (Info, Elements,
                       Package->RetInfo3.ObjectType[i], i);
                   if (ACPI_FAILURE (Status))
                   {
                       return_ACPI_STATUS (Status);
                   }
               }
               else
               {
                   /* These are the optional package elements */
   
                   Status = AcpiNsCheckObjectType (Info, Elements,
                       Package->RetInfo3.TailObjectType, i);
                   if (ACPI_FAILURE (Status))
                   {
                       return_ACPI_STATUS (Status);
                   }
               }
   
               Elements++;
           }
           break;
   
       case ACPI_PTYPE2_REV_FIXED:
   
           /* First element is the (Integer) revision */
   
           Status = AcpiNsCheckObjectType (
               Info, Elements, ACPI_RTYPE_INTEGER, 0);
           if (ACPI_FAILURE (Status))
           {
               return_ACPI_STATUS (Status);
           }
   
           Elements++;
           Count--;
   
           /* Examine the subpackages */
   
           Status = AcpiNsCheckPackageList (Info, Package, Elements, Count);
           break;
   
       case ACPI_PTYPE2_PKG_COUNT:
   
           /* First element is the (Integer) count of subpackages to follow */
   
           Status = AcpiNsCheckObjectType (
               Info, Elements, ACPI_RTYPE_INTEGER, 0);
           if (ACPI_FAILURE (Status))
           {
               return_ACPI_STATUS (Status);
           }
   
           /*
            * Count cannot be larger than the parent package length, but allow it
            * to be smaller. The >= accounts for the Integer above.
            */
           ExpectedCount = (UINT32) (*Elements)->Integer.Value;
           if (ExpectedCount >= Count)
           {
               goto PackageTooSmall;
           }
   
           Count = ExpectedCount;
           Elements++;
   
           /* Examine the subpackages */
   
           Status = AcpiNsCheckPackageList (Info, Package, Elements, Count);
           break;
   
       case ACPI_PTYPE2:
       case ACPI_PTYPE2_FIXED:
       case ACPI_PTYPE2_MIN:
       case ACPI_PTYPE2_COUNT:
       case ACPI_PTYPE2_FIX_VAR:
           /*
            * These types all return a single Package that consists of a
            * variable number of subpackages.
            *
            * First, ensure that the first element is a subpackage. If not,
            * the BIOS may have incorrectly returned the object as a single
            * package instead of a Package of Packages (a common error if
            * there is only one entry). We may be able to repair this by
            * wrapping the returned Package with a new outer Package.
            */
           if (*Elements && ((*Elements)->Common.Type != ACPI_TYPE_PACKAGE))
           {
               /* Create the new outer package and populate it */
   
               Status = AcpiNsWrapWithPackage (
                   Info, ReturnObject, ReturnObjectPtr);
               if (ACPI_FAILURE (Status))
               {
                   return_ACPI_STATUS (Status);
               }
   
               /* Update locals to point to the new package (of 1 element) */
   
               ReturnObject = *ReturnObjectPtr;
               Elements = ReturnObject->Package.Elements;
               Count = 1;
           }
   
           /* Examine the subpackages */
   
           Status = AcpiNsCheckPackageList (Info, Package, Elements, Count);
           break;
   
       case ACPI_PTYPE2_VAR_VAR:
           /*
            * Returns a variable list of packages, each with a variable list
            * of objects.
            */
           break;
   
       case ACPI_PTYPE2_UUID_PAIR:
   
           /* The package must contain pairs of (UUID + type) */
   
           if (Count & 1)
           {
               ExpectedCount = Count + 1;
               goto PackageTooSmall;
           }
   
           while (Count > 0)
           {
               Status = AcpiNsCheckObjectType(Info, Elements,
                   Package->RetInfo.ObjectType1, 0);
               if (ACPI_FAILURE(Status))
               {
                   return_ACPI_STATUS (Status);
               }
   
               /* Validate length of the UUID buffer */
   
               if ((*Elements)->Buffer.Length != 16)
               {
                   ACPI_WARN_PREDEFINED ((AE_INFO, Info->FullPathname,
                       Info->NodeFlags, "Invalid length for UUID Buffer"));
                   return_ACPI_STATUS (AE_AML_OPERAND_VALUE);
               }
   
               Status = AcpiNsCheckObjectType(Info, Elements + 1,
                   Package->RetInfo.ObjectType2, 0);
               if (ACPI_FAILURE(Status))
               {
                   return_ACPI_STATUS (Status);
               }
   
               Elements += 2;
               Count -= 2;
           }
           break;
   
       default:
   
           /* Should not get here if predefined info table is correct */
   
           ACPI_WARN_PREDEFINED ((AE_INFO, Info->FullPathname, Info->NodeFlags,
               "Invalid internal return type in table entry: %X",
               Package->RetInfo.Type));
   
           return_ACPI_STATUS (AE_AML_INTERNAL);
       }
   
       return_ACPI_STATUS (Status);
   
   
   PackageTooSmall:
   
       /* Error exit for the case with an incorrect package count */
   
       ACPI_WARN_PREDEFINED ((AE_INFO, Info->FullPathname, Info->NodeFlags,
           "Return Package is too small - found %u elements, expected %u",
           Count, ExpectedCount));
   
       return_ACPI_STATUS (AE_AML_OPERAND_VALUE);
   }
   
   
   /*******************************************************************************
    *
    * FUNCTION:    AcpiNsCheckPackageList
    *
    * PARAMETERS:  Info            - Method execution information block
    *              Package         - Pointer to package-specific info for method
    *              Elements        - Element list of parent package. All elements
    *                                of this list should be of type Package.
    *              Count           - Count of subpackages
    *
    * RETURN:      Status
    *
    * DESCRIPTION: Examine a list of subpackages
    *
    ******************************************************************************/
   
   static ACPI_STATUS
   AcpiNsCheckPackageList (
       ACPI_EVALUATE_INFO          *Info,
       const ACPI_PREDEFINED_INFO  *Package,
       ACPI_OPERAND_OBJECT         **Elements,
       UINT32                      Count)
   {
       ACPI_OPERAND_OBJECT         *SubPackage;
       ACPI_OPERAND_OBJECT         **SubElements;
       ACPI_STATUS                 Status;
       UINT32                      ExpectedCount;
       UINT32                      i;
       UINT32                      j;
   
   
       /*
        * Validate each subpackage in the parent Package
        *
        * NOTE: assumes list of subpackages contains no NULL elements.
        * Any NULL elements should have been removed by earlier call
        * to AcpiNsRemoveNullElements.
        */
       for (i = 0; i < Count; i++)
       {
           SubPackage = *Elements;
           SubElements = SubPackage->Package.Elements;
           Info->ParentPackage = SubPackage;
   
           /* Each sub-object must be of type Package */
   
           Status = AcpiNsCheckObjectType (Info, &SubPackage,
               ACPI_RTYPE_PACKAGE, i);
           if (ACPI_FAILURE (Status))
           {
               return (Status);
           }
   
           /* Examine the different types of expected subpackages */
   
           Info->ParentPackage = SubPackage;
           switch (Package->RetInfo.Type)
           {
           case ACPI_PTYPE2:
           case ACPI_PTYPE2_PKG_COUNT:
           case ACPI_PTYPE2_REV_FIXED:
   
               /* Each subpackage has a fixed number of elements */
   
               ExpectedCount = Package->RetInfo.Count1 + Package->RetInfo.Count2;
               if (SubPackage->Package.Count < ExpectedCount)
               {
                   goto PackageTooSmall;
               }
   
               Status = AcpiNsCheckPackageElements (Info, SubElements,
                   Package->RetInfo.ObjectType1,
                   Package->RetInfo.Count1,
                   Package->RetInfo.ObjectType2,
                   Package->RetInfo.Count2, 0);
               if (ACPI_FAILURE (Status))
               {
                   return (Status);
               }
               break;
   
           case ACPI_PTYPE2_FIX_VAR:
               /*
                * Each subpackage has a fixed number of elements and an
                * optional element
                */
               ExpectedCount = Package->RetInfo.Count1 + Package->RetInfo.Count2;
               if (SubPackage->Package.Count < ExpectedCount)
               {
                   goto PackageTooSmall;
               }
   
               Status = AcpiNsCheckPackageElements (Info, SubElements,
                   Package->RetInfo.ObjectType1,
                   Package->RetInfo.Count1,
                   Package->RetInfo.ObjectType2,
                   SubPackage->Package.Count - Package->RetInfo.Count1, 0);
               if (ACPI_FAILURE (Status))
               {
                   return (Status);
               }
               break;
   
           case ACPI_PTYPE2_VAR_VAR:
               /*
                * Each subpackage has a fixed or variable number of elements
                */
               break;
   
           case ACPI_PTYPE2_FIXED:
   
               /* Each subpackage has a fixed length */
   
               ExpectedCount = Package->RetInfo2.Count;
               if (SubPackage->Package.Count < ExpectedCount)
               {
                   goto PackageTooSmall;
               }
   
               /* Check the type of each subpackage element */
   
               for (j = 0; j < ExpectedCount; j++)
               {
                   Status = AcpiNsCheckObjectType (Info, &SubElements[j],
                       Package->RetInfo2.ObjectType[j], j);
                   if (ACPI_FAILURE (Status))
                   {
                       return (Status);
                   }
               }
               break;
   
           case ACPI_PTYPE2_MIN:
   
               /* Each subpackage has a variable but minimum length */
   
               ExpectedCount = Package->RetInfo.Count1;
               if (SubPackage->Package.Count < ExpectedCount)
               {
                   goto PackageTooSmall;
               }
   
               /* Check the type of each subpackage element */
   
               Status = AcpiNsCheckPackageElements (Info, SubElements,
                   Package->RetInfo.ObjectType1,
                   SubPackage->Package.Count, 0, 0, 0);
               if (ACPI_FAILURE (Status))
               {
                   return (Status);
               }
               break;
   
           case ACPI_PTYPE2_COUNT:
               /*
                * First element is the (Integer) count of elements, including
                * the count field (the ACPI name is NumElements)
                */
               Status = AcpiNsCheckObjectType (Info, SubElements,
                   ACPI_RTYPE_INTEGER, 0);
               if (ACPI_FAILURE (Status))
               {
                   return (Status);
               }
   
               /*
                * Make sure package is large enough for the Count and is
                * is as large as the minimum size
                */
               ExpectedCount = (UINT32) (*SubElements)->Integer.Value;
               if (SubPackage->Package.Count < ExpectedCount)
               {
                   goto PackageTooSmall;
               }
   
               if (SubPackage->Package.Count < Package->RetInfo.Count1)
               {
                   ExpectedCount = Package->RetInfo.Count1;
                   goto PackageTooSmall;
               }
   
               if (ExpectedCount == 0)
               {
                   /*
                    * Either the NumEntries element was originally zero or it was
                    * a NULL element and repaired to an Integer of value zero.
                    * In either case, repair it by setting NumEntries to be the
                    * actual size of the subpackage.
                    */
                   ExpectedCount = SubPackage->Package.Count;
                   (*SubElements)->Integer.Value = ExpectedCount;
               }
   
               /* Check the type of each subpackage element */
   
               Status = AcpiNsCheckPackageElements (Info, (SubElements + 1),
                   Package->RetInfo.ObjectType1,
                   (ExpectedCount - 1), 0, 0, 1);
               if (ACPI_FAILURE (Status))
               {
                   return (Status);
               }
               break;
   
           default: /* Should not get here, type was validated by caller */
   
               ACPI_ERROR ((AE_INFO, "Invalid Package type: %X",
                   Package->RetInfo.Type));
               return (AE_AML_INTERNAL);
           }
   
           Elements++;
       }
   
       return (AE_OK);
   
   
   PackageTooSmall:
   
       /* The subpackage count was smaller than required */
   
       ACPI_WARN_PREDEFINED ((AE_INFO, Info->FullPathname, Info->NodeFlags,
           "Return SubPackage[%u] is too small - found %u elements, expected %u",
           i, SubPackage->Package.Count, ExpectedCount));
   
       return (AE_AML_OPERAND_VALUE);
   }
   
   
   /*******************************************************************************
    *
    * FUNCTION:    AcpiNsCustomPackage
    *
    * PARAMETERS:  Info                - Method execution information block
    *              Elements            - Pointer to the package elements array
    *              Count               - Element count for the package
    *
    * RETURN:      Status
    *
    * DESCRIPTION: Check a returned package object for the correct count and
    *              correct type of all sub-objects.
    *
    * NOTE: Currently used for the _BIX method only. When needed for two or more
    * methods, probably a detect/dispatch mechanism will be required.
    *
    ******************************************************************************/
   
   static ACPI_STATUS
   AcpiNsCustomPackage (
       ACPI_EVALUATE_INFO          *Info,
       ACPI_OPERAND_OBJECT         **Elements,
       UINT32                      Count)
   {
       UINT32                      ExpectedCount;
       UINT32                      Version;
       ACPI_STATUS                 Status = AE_OK;
   
   
       ACPI_FUNCTION_NAME (NsCustomPackage);
   
   
       /* Get version number, must be Integer */
   
       if ((*Elements)->Common.Type != ACPI_TYPE_INTEGER)
       {
           ACPI_WARN_PREDEFINED ((AE_INFO, Info->FullPathname, Info->NodeFlags,
               "Return Package has invalid object type for version number"));
           return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
       }
   
       Version = (UINT32) (*Elements)->Integer.Value;
       ExpectedCount = 21;         /* Version 1 */
   
       if (Version == 0)
       {
           ExpectedCount = 20;     /* Version 0 */
       }
   
       if (Count < ExpectedCount)
       {
           ACPI_WARN_PREDEFINED ((AE_INFO, Info->FullPathname, Info->NodeFlags,
               "Return Package is too small - found %u elements, expected %u",
               Count, ExpectedCount));
           return_ACPI_STATUS (AE_AML_OPERAND_VALUE);
       }
       else if (Count > ExpectedCount)
       {
           ACPI_DEBUG_PRINT ((ACPI_DB_REPAIR,
               "%s: Return Package is larger than needed - "
               "found %u, expected %u\n",
               Info->FullPathname, Count, ExpectedCount));
       }
   
       /* Validate all elements of the returned package */
   
       Status = AcpiNsCheckPackageElements (Info, Elements,
           ACPI_RTYPE_INTEGER, 16,
           ACPI_RTYPE_STRING, 4, 0);
       if (ACPI_FAILURE (Status))
       {
           return_ACPI_STATUS (Status);
       }
   
       /* Version 1 has a single trailing integer */
   
       if (Version > 0)
       {
           Status = AcpiNsCheckPackageElements (Info, Elements + 20,
               ACPI_RTYPE_INTEGER, 1, 0, 0, 20);
       }
   
       return_ACPI_STATUS (Status);
   }
   
   
   /*******************************************************************************
    *
    * FUNCTION:    AcpiNsCheckPackageElements
    *
    * PARAMETERS:  Info            - Method execution information block
    *              Elements        - Pointer to the package elements array
    *              Type1           - Object type for first group
    *              Count1          - Count for first group
    *              Type2           - Object type for second group
    *              Count2          - Count for second group
    *              StartIndex      - Start of the first group of elements
    *
    * RETURN:      Status
    *
    * DESCRIPTION: Check that all elements of a package are of the correct object
    *              type. Supports up to two groups of different object types.
    *
    ******************************************************************************/
   
   static ACPI_STATUS
   AcpiNsCheckPackageElements (
       ACPI_EVALUATE_INFO          *Info,
       ACPI_OPERAND_OBJECT         **Elements,
       UINT8                       Type1,
       UINT32                      Count1,
       UINT8                       Type2,
       UINT32                      Count2,
       UINT32                      StartIndex)
   {
       ACPI_OPERAND_OBJECT         **ThisElement = Elements;
       ACPI_STATUS                 Status;
       UINT32                      i;
   
   
       ACPI_FUNCTION_TRACE (NsCheckPackageElements);
   
       /*
        * Up to two groups of package elements are supported by the data
        * structure. All elements in each group must be of the same type.
        * The second group can have a count of zero.
        */
       for (i = 0; i < Count1; i++)
       {
           Status = AcpiNsCheckObjectType (Info, ThisElement,
               Type1, i + StartIndex);
           if (ACPI_FAILURE (Status))
           {
               return_ACPI_STATUS (Status);
           }
   
           ThisElement++;
       }
   
       for (i = 0; i < Count2; i++)
       {
           Status = AcpiNsCheckObjectType (Info, ThisElement,
               Type2, (i + Count1 + StartIndex));
           if (ACPI_FAILURE (Status))
           {
               return_ACPI_STATUS (Status);
           }
   
           ThisElement++;
       }
   
       return_ACPI_STATUS (AE_OK);
   }

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