/****************************************************************************** * * Module Name: nspredef - Validation of ACPI predefined methods and objects * *****************************************************************************/ /****************************************************************************** * * 1. Copyright Notice * * Some or all of this work - Copyright (c) 1999 - 2021, 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. * *****************************************************************************/ #define ACPI_CREATE_PREDEFINED_TABLE #include #include #include #include #define _COMPONENT ACPI_NAMESPACE ACPI_MODULE_NAME ("nspredef") /******************************************************************************* * * This module validates predefined ACPI objects that appear in the namespace, * at the time they are evaluated (via AcpiEvaluateObject). The purpose of this * validation is to detect problems with BIOS-exposed predefined ACPI objects * before the results are returned to the ACPI-related drivers. * * There are several areas that are validated: * * 1) The number of input arguments as defined by the method/object in the * ASL is validated against the ACPI specification. * 2) The type of the return object (if any) is validated against the ACPI * specification. * 3) For returned package objects, the count of package elements is * validated, as well as the type of each package element. Nested * packages are supported. * * For any problems found, a warning message is issued. * ******************************************************************************/ /* Local prototypes */ static ACPI_STATUS AcpiNsCheckReference ( ACPI_EVALUATE_INFO *Info, ACPI_OPERAND_OBJECT *ReturnObject); static UINT32 AcpiNsGetBitmappedType ( ACPI_OPERAND_OBJECT *ReturnObject); /******************************************************************************* * * FUNCTION: AcpiNsCheckReturnValue * * PARAMETERS: Node - Namespace node for the method/object * Info - Method execution information block * UserParamCount - Number of parameters actually passed * ReturnStatus - Status from the object evaluation * ReturnObjectPtr - Pointer to the object returned from the * evaluation of a method or object * * RETURN: Status * * DESCRIPTION: Check the value returned from a predefined name. * ******************************************************************************/ ACPI_STATUS AcpiNsCheckReturnValue ( ACPI_NAMESPACE_NODE *Node, ACPI_EVALUATE_INFO *Info, UINT32 UserParamCount, ACPI_STATUS ReturnStatus, ACPI_OPERAND_OBJECT **ReturnObjectPtr) { ACPI_STATUS Status; const ACPI_PREDEFINED_INFO *Predefined; ACPI_FUNCTION_TRACE (NsCheckReturnValue); /* If not a predefined name, we cannot validate the return object */ Predefined = Info->Predefined; if (!Predefined) { return_ACPI_STATUS (AE_OK); } /* * If the method failed or did not actually return an object, we cannot * validate the return object */ if ((ReturnStatus != AE_OK) && (ReturnStatus != AE_CTRL_RETURN_VALUE)) { return_ACPI_STATUS (AE_OK); } /* * Return value validation and possible repair. * * 1) Don't perform return value validation/repair if this feature * has been disabled via a global option. * * 2) We have a return value, but if one wasn't expected, just exit, * this is not a problem. For example, if the "Implicit Return" * feature is enabled, methods will always return a value. * * 3) If the return value can be of any type, then we cannot perform * any validation, just exit. */ if (AcpiGbl_DisableAutoRepair || (!Predefined->Info.ExpectedBtypes) || (Predefined->Info.ExpectedBtypes == ACPI_RTYPE_ALL)) { return_ACPI_STATUS (AE_OK); } /* * Check that the type of the main return object is what is expected * for this predefined name */ Status = AcpiNsCheckObjectType (Info, ReturnObjectPtr, Predefined->Info.ExpectedBtypes, ACPI_NOT_PACKAGE_ELEMENT); if (ACPI_FAILURE (Status)) { goto Exit; } /* * * 4) If there is no return value and it is optional, just return * AE_OK (_WAK). */ if (!(*ReturnObjectPtr)) { goto Exit; } /* * For returned Package objects, check the type of all sub-objects. * Note: Package may have been newly created by call above. */ if ((*ReturnObjectPtr)->Common.Type == ACPI_TYPE_PACKAGE) { Info->ParentPackage = *ReturnObjectPtr; Status = AcpiNsCheckPackage (Info, ReturnObjectPtr); if (ACPI_FAILURE (Status)) { /* We might be able to fix some errors */ if ((Status != AE_AML_OPERAND_TYPE) && (Status != AE_AML_OPERAND_VALUE)) { goto Exit; } } } /* * The return object was OK, or it was successfully repaired above. * Now make some additional checks such as verifying that package * objects are sorted correctly (if required) or buffer objects have * the correct data width (bytes vs. dwords). These repairs are * performed on a per-name basis, i.e., the code is specific to * particular predefined names. */ Status = AcpiNsComplexRepairs (Info, Node, Status, ReturnObjectPtr); Exit: /* * If the object validation failed or if we successfully repaired one * or more objects, mark the parent node to suppress further warning * messages during the next evaluation of the same method/object. */ if (ACPI_FAILURE (Status) || (Info->ReturnFlags & ACPI_OBJECT_REPAIRED)) { Node->Flags |= ANOBJ_EVALUATED; } return_ACPI_STATUS (Status); } /******************************************************************************* * * FUNCTION: AcpiNsCheckObjectType * * PARAMETERS: Info - Method execution information block * ReturnObjectPtr - Pointer to the object returned from the * evaluation of a method or object * ExpectedBtypes - Bitmap of expected return type(s) * PackageIndex - Index of object within parent package (if * applicable - ACPI_NOT_PACKAGE_ELEMENT * otherwise) * * RETURN: Status * * DESCRIPTION: Check the type of the return object against the expected object * type(s). Use of Btype allows multiple expected object types. * ******************************************************************************/ ACPI_STATUS AcpiNsCheckObjectType ( ACPI_EVALUATE_INFO *Info, ACPI_OPERAND_OBJECT **ReturnObjectPtr, UINT32 ExpectedBtypes, UINT32 PackageIndex) { ACPI_OPERAND_OBJECT *ReturnObject = *ReturnObjectPtr; ACPI_STATUS Status = AE_OK; char TypeBuffer[96]; /* Room for 10 types */ /* A Namespace node should not get here, but make sure */ if (ReturnObject && ACPI_GET_DESCRIPTOR_TYPE (ReturnObject) == ACPI_DESC_TYPE_NAMED) { ACPI_WARN_PREDEFINED ((AE_INFO, Info->FullPathname, Info->NodeFlags, "Invalid return type - Found a Namespace node [%4.4s] type %s", ReturnObject->Node.Name.Ascii, AcpiUtGetTypeName (ReturnObject->Node.Type))); return (AE_AML_OPERAND_TYPE); } /* * Convert the object type (ACPI_TYPE_xxx) to a bitmapped object type. * The bitmapped type allows multiple possible return types. * * Note, the cases below must handle all of the possible types returned * from all of the predefined names (including elements of returned * packages) */ Info->ReturnBtype = AcpiNsGetBitmappedType (ReturnObject); if (Info->ReturnBtype == ACPI_RTYPE_ANY) { /* Not one of the supported objects, must be incorrect */ goto TypeErrorExit; } /* For reference objects, check that the reference type is correct */ if ((Info->ReturnBtype & ExpectedBtypes) == ACPI_RTYPE_REFERENCE) { Status = AcpiNsCheckReference (Info, ReturnObject); return (Status); } /* Attempt simple repair of the returned object if necessary */ Status = AcpiNsSimpleRepair (Info, ExpectedBtypes, PackageIndex, ReturnObjectPtr); if (ACPI_SUCCESS (Status)) { return (AE_OK); /* Successful repair */ } TypeErrorExit: /* Create a string with all expected types for this predefined object */ AcpiUtGetExpectedReturnTypes (TypeBuffer, ExpectedBtypes); if (!ReturnObject) { ACPI_WARN_PREDEFINED ((AE_INFO, Info->FullPathname, Info->NodeFlags, "Expected return object of type %s", TypeBuffer)); } else if (PackageIndex == ACPI_NOT_PACKAGE_ELEMENT) { ACPI_WARN_PREDEFINED ((AE_INFO, Info->FullPathname, Info->NodeFlags, "Return type mismatch - found %s, expected %s", AcpiUtGetObjectTypeName (ReturnObject), TypeBuffer)); } else { ACPI_WARN_PREDEFINED ((AE_INFO, Info->FullPathname, Info->NodeFlags, "Return Package type mismatch at index %u - " "found %s, expected %s", PackageIndex, AcpiUtGetObjectTypeName (ReturnObject), TypeBuffer)); } return (AE_AML_OPERAND_TYPE); } /******************************************************************************* * * FUNCTION: AcpiNsCheckReference * * PARAMETERS: Info - Method execution information block * ReturnObject - Object returned from the evaluation of a * method or object * * RETURN: Status * * DESCRIPTION: Check a returned reference object for the correct reference * type. The only reference type that can be returned from a * predefined method is a named reference. All others are invalid. * ******************************************************************************/ static ACPI_STATUS AcpiNsCheckReference ( ACPI_EVALUATE_INFO *Info, ACPI_OPERAND_OBJECT *ReturnObject) { /* * Check the reference object for the correct reference type (opcode). * The only type of reference that can be converted to an ACPI_OBJECT is * a reference to a named object (reference class: NAME) */ if (ReturnObject->Reference.Class == ACPI_REFCLASS_NAME) { return (AE_OK); } ACPI_WARN_PREDEFINED ((AE_INFO, Info->FullPathname, Info->NodeFlags, "Return type mismatch - unexpected reference object type [%s] %2.2X", AcpiUtGetReferenceName (ReturnObject), ReturnObject->Reference.Class)); return (AE_AML_OPERAND_TYPE); } /******************************************************************************* * * FUNCTION: AcpiNsGetBitmappedType * * PARAMETERS: ReturnObject - Object returned from method/obj evaluation * * RETURN: Object return type. ACPI_RTYPE_ANY indicates that the object * type is not supported. ACPI_RTYPE_NONE indicates that no * object was returned (ReturnObject is NULL). * * DESCRIPTION: Convert object type into a bitmapped object return type. * ******************************************************************************/ static UINT32 AcpiNsGetBitmappedType ( ACPI_OPERAND_OBJECT *ReturnObject) { UINT32 ReturnBtype; if (!ReturnObject) { return (ACPI_RTYPE_NONE); } /* Map ACPI_OBJECT_TYPE to internal bitmapped type */ switch (ReturnObject->Common.Type) { case ACPI_TYPE_INTEGER: ReturnBtype = ACPI_RTYPE_INTEGER; break; case ACPI_TYPE_BUFFER: ReturnBtype = ACPI_RTYPE_BUFFER; break; case ACPI_TYPE_STRING: ReturnBtype = ACPI_RTYPE_STRING; break; case ACPI_TYPE_PACKAGE: ReturnBtype = ACPI_RTYPE_PACKAGE; break; case ACPI_TYPE_LOCAL_REFERENCE: ReturnBtype = ACPI_RTYPE_REFERENCE; break; default: /* Not one of the supported objects, must be incorrect */ ReturnBtype = ACPI_RTYPE_ANY; break; } return (ReturnBtype); }