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Diffstat (limited to 'namespace/nsrepair.c')
| -rw-r--r-- | namespace/nsrepair.c | 291 |
1 files changed, 291 insertions, 0 deletions
diff --git a/namespace/nsrepair.c b/namespace/nsrepair.c new file mode 100644 index 0000000000000..ae534264ab0c4 --- /dev/null +++ b/namespace/nsrepair.c @@ -0,0 +1,291 @@ +/****************************************************************************** + * + * Module Name: nsrepair - Repair for objects returned by predefined methods + * + *****************************************************************************/ + +/****************************************************************************** + * + * 1. Copyright Notice + * + * Some or all of this work - Copyright (c) 1999 - 2009, 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. + * + *****************************************************************************/ + +#define __NSREPAIR_C__ + +#include "acpi.h" +#include "accommon.h" +#include "acnamesp.h" +#include "acpredef.h" + +#define _COMPONENT ACPI_NAMESPACE + ACPI_MODULE_NAME ("nsrepair") + + +/******************************************************************************* + * + * FUNCTION: AcpiNsRepairObject + * + * PARAMETERS: Data - Pointer to validation data structure + * ExpectedBtypes - Object types expected + * PackageIndex - Index of object within parent package (if + * applicable - ACPI_NOT_PACKAGE_ELEMENT + * otherwise) + * ReturnObjectPtr - Pointer to the object returned from the + * evaluation of a method or object + * + * RETURN: Status. AE_OK if repair was successful. + * + * DESCRIPTION: Attempt to repair/convert a return object of a type that was + * not expected. + * + ******************************************************************************/ + +ACPI_STATUS +AcpiNsRepairObject ( + ACPI_PREDEFINED_DATA *Data, + UINT32 ExpectedBtypes, + UINT32 PackageIndex, + ACPI_OPERAND_OBJECT **ReturnObjectPtr) +{ + ACPI_OPERAND_OBJECT *ReturnObject = *ReturnObjectPtr; + ACPI_OPERAND_OBJECT *NewObject; + ACPI_SIZE Length; + + + switch (ReturnObject->Common.Type) + { + case ACPI_TYPE_BUFFER: + + /* Does the method/object legally return a string? */ + + if (!(ExpectedBtypes & ACPI_RTYPE_STRING)) + { + return (AE_AML_OPERAND_TYPE); + } + + /* + * Have a Buffer, expected a String, convert. Use a ToString + * conversion, no transform performed on the buffer data. The best + * example of this is the _BIF method, where the string data from + * the battery is often (incorrectly) returned as buffer object(s). + */ + Length = 0; + while ((Length < ReturnObject->Buffer.Length) && + (ReturnObject->Buffer.Pointer[Length])) + { + Length++; + } + + /* Allocate a new string object */ + + NewObject = AcpiUtCreateStringObject (Length); + if (!NewObject) + { + return (AE_NO_MEMORY); + } + + /* + * Copy the raw buffer data with no transform. String is already NULL + * terminated at Length+1. + */ + ACPI_MEMCPY (NewObject->String.Pointer, + ReturnObject->Buffer.Pointer, Length); + + /* + * If the original object is a package element, we need to: + * 1. Set the reference count of the new object to match the + * reference count of the old object. + * 2. Decrement the reference count of the original object. + */ + if (PackageIndex != ACPI_NOT_PACKAGE_ELEMENT) + { + NewObject->Common.ReferenceCount = + ReturnObject->Common.ReferenceCount; + + if (ReturnObject->Common.ReferenceCount > 1) + { + ReturnObject->Common.ReferenceCount--; + } + + ACPI_WARN_PREDEFINED ((AE_INFO, Data->Pathname, Data->NodeFlags, + "Converted Buffer to expected String at index %u", + PackageIndex)); + } + else + { + ACPI_WARN_PREDEFINED ((AE_INFO, Data->Pathname, Data->NodeFlags, + "Converted Buffer to expected String")); + } + + /* Delete old object, install the new return object */ + + AcpiUtRemoveReference (ReturnObject); + *ReturnObjectPtr = NewObject; + Data->Flags |= ACPI_OBJECT_REPAIRED; + return (AE_OK); + + default: + break; + } + + return (AE_AML_OPERAND_TYPE); +} + + +/******************************************************************************* + * + * FUNCTION: AcpiNsRepairPackageList + * + * PARAMETERS: Data - Pointer to validation data structure + * ObjDescPtr - Pointer to the object to repair. The new + * package object is returned here, + * overwriting the old object. + * + * RETURN: Status, new object in *ObjDescPtr + * + * DESCRIPTION: Repair a common problem with objects that are defined to return + * a variable-length Package of Packages. If the variable-length + * is one, some BIOS code mistakenly simply declares a single + * Package instead of a Package with one sub-Package. This + * function attempts to repair this error by wrapping a Package + * object around the original Package, creating the correct + * Package with one sub-Package. + * + * Names that can be repaired in this manner include: + * _ALR, _CSD, _HPX, _MLS, _PRT, _PSS, _TRT, TSS + * + ******************************************************************************/ + +ACPI_STATUS +AcpiNsRepairPackageList ( + ACPI_PREDEFINED_DATA *Data, + ACPI_OPERAND_OBJECT **ObjDescPtr) +{ + ACPI_OPERAND_OBJECT *PkgObjDesc; + + + /* + * Create the new outer package and populate it. The new package will + * have a single element, the lone subpackage. + */ + PkgObjDesc = AcpiUtCreatePackageObject (1); + if (!PkgObjDesc) + { + return (AE_NO_MEMORY); + } + + PkgObjDesc->Package.Elements[0] = *ObjDescPtr; + + /* Return the new object in the object pointer */ + + *ObjDescPtr = PkgObjDesc; + Data->Flags |= ACPI_OBJECT_REPAIRED; + + ACPI_WARN_PREDEFINED ((AE_INFO, Data->Pathname, Data->NodeFlags, + "Incorrectly formed Package, attempting repair")); + + return (AE_OK); +} |