/****************************************************************************** * * Module Name: nsarguments - Validation of args for ACPI predefined methods * *****************************************************************************/ /****************************************************************************** * * 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. * *****************************************************************************/ #include "acpi.h" #include "accommon.h" #include "acnamesp.h" #include "acpredef.h" #define _COMPONENT ACPI_NAMESPACE ACPI_MODULE_NAME ("nsarguments") /******************************************************************************* * * FUNCTION: AcpiNsCheckArgumentTypes * * PARAMETERS: Info - Method execution information block * * RETURN: None * * DESCRIPTION: Check the incoming argument count and all argument types * against the argument type list for a predefined name. * ******************************************************************************/ void AcpiNsCheckArgumentTypes ( ACPI_EVALUATE_INFO *Info) { UINT16 ArgTypeList; UINT8 ArgCount; UINT8 ArgType; UINT8 UserArgType; UINT32 i; /* * If not a predefined name, cannot typecheck args, because * we have no idea what argument types are expected. * Also, ignore typecheck if warnings/errors if this method * has already been evaluated at least once -- in order * to suppress repetitive messages. */ if (!Info->Predefined || (Info->Node->Flags & ANOBJ_EVALUATED)) { return; } ArgTypeList = Info->Predefined->Info.ArgumentList; ArgCount = METHOD_GET_ARG_COUNT (ArgTypeList); /* Typecheck all arguments */ for (i = 0; ((i < ArgCount) && (i < Info->ParamCount)); i++) { ArgType = METHOD_GET_NEXT_TYPE (ArgTypeList); UserArgType = Info->Parameters[i]->Common.Type; /* No typechecking for ACPI_TYPE_ANY */ if ((UserArgType != ArgType) && (ArgType != ACPI_TYPE_ANY)) { ACPI_WARN_PREDEFINED ((AE_INFO, Info->FullPathname, ACPI_WARN_ALWAYS, "Argument #%u type mismatch - " "Found [%s], ACPI requires [%s]", (i + 1), AcpiUtGetTypeName (UserArgType), AcpiUtGetTypeName (ArgType))); /* Prevent any additional typechecking for this method */ Info->Node->Flags |= ANOBJ_EVALUATED; } } } /******************************************************************************* * * FUNCTION: AcpiNsCheckAcpiCompliance * * PARAMETERS: Pathname - Full pathname to the node (for error msgs) * Node - Namespace node for the method/object * Predefined - Pointer to entry in predefined name table * * RETURN: None * * DESCRIPTION: Check that the declared parameter count (in ASL/AML) for a * predefined name is what is expected (matches what is defined in * the ACPI specification for this predefined name.) * ******************************************************************************/ void AcpiNsCheckAcpiCompliance ( char *Pathname, ACPI_NAMESPACE_NODE *Node, const ACPI_PREDEFINED_INFO *Predefined) { UINT32 AmlParamCount; UINT32 RequiredParamCount; if (!Predefined || (Node->Flags & ANOBJ_EVALUATED)) { return; } /* Get the ACPI-required arg count from the predefined info table */ RequiredParamCount = METHOD_GET_ARG_COUNT (Predefined->Info.ArgumentList); /* * If this object is not a control method, we can check if the ACPI * spec requires that it be a method. */ if (Node->Type != ACPI_TYPE_METHOD) { if (RequiredParamCount > 0) { /* Object requires args, must be implemented as a method */ ACPI_BIOS_ERROR_PREDEFINED ((AE_INFO, Pathname, ACPI_WARN_ALWAYS, "Object (%s) must be a control method with %u arguments", AcpiUtGetTypeName (Node->Type), RequiredParamCount)); } else if (!RequiredParamCount && !Predefined->Info.ExpectedBtypes) { /* Object requires no args and no return value, must be a method */ ACPI_BIOS_ERROR_PREDEFINED ((AE_INFO, Pathname, ACPI_WARN_ALWAYS, "Object (%s) must be a control method " "with no arguments and no return value", AcpiUtGetTypeName (Node->Type))); } return; } /* * This is a control method. * Check that the ASL/AML-defined parameter count for this method * matches the ACPI-required parameter count * * Some methods are allowed to have a "minimum" number of args (_SCP) * because their definition in ACPI has changed over time. * * Note: These are BIOS errors in the declaration of the object */ AmlParamCount = Node->Object->Method.ParamCount; if (AmlParamCount < RequiredParamCount) { ACPI_BIOS_ERROR_PREDEFINED ((AE_INFO, Pathname, ACPI_WARN_ALWAYS, "Insufficient arguments - " "ASL declared %u, ACPI requires %u", AmlParamCount, RequiredParamCount)); } else if ((AmlParamCount > RequiredParamCount) && !(Predefined->Info.ArgumentList & ARG_COUNT_IS_MINIMUM)) { ACPI_BIOS_ERROR_PREDEFINED ((AE_INFO, Pathname, ACPI_WARN_ALWAYS, "Excess arguments - " "ASL declared %u, ACPI requires %u", AmlParamCount, RequiredParamCount)); } } /******************************************************************************* * * FUNCTION: AcpiNsCheckArgumentCount * * PARAMETERS: Pathname - Full pathname to the node (for error msgs) * Node - Namespace node for the method/object * UserParamCount - Number of args passed in by the caller * Predefined - Pointer to entry in predefined name table * * RETURN: None * * DESCRIPTION: Check that incoming argument count matches the declared * parameter count (in the ASL/AML) for an object. * ******************************************************************************/ void AcpiNsCheckArgumentCount ( char *Pathname, ACPI_NAMESPACE_NODE *Node, UINT32 UserParamCount, const ACPI_PREDEFINED_INFO *Predefined) { UINT32 AmlParamCount; UINT32 RequiredParamCount; if (Node->Flags & ANOBJ_EVALUATED) { return; } if (!Predefined) { /* * Not a predefined name. Check the incoming user argument count * against the count that is specified in the method/object. */ if (Node->Type != ACPI_TYPE_METHOD) { if (UserParamCount) { ACPI_INFO_PREDEFINED ((AE_INFO, Pathname, ACPI_WARN_ALWAYS, "%u arguments were passed to a non-method ACPI object (%s)", UserParamCount, AcpiUtGetTypeName (Node->Type))); } return; } /* * This is a control method. Check the parameter count. * We can only check the incoming argument count against the * argument count declared for the method in the ASL/AML. * * Emit a message if too few or too many arguments have been passed * by the caller. * * Note: Too many arguments will not cause the method to * fail. However, the method will fail if there are too few * arguments and the method attempts to use one of the missing ones. */ AmlParamCount = Node->Object->Method.ParamCount; if (UserParamCount < AmlParamCount) { ACPI_WARN_PREDEFINED ((AE_INFO, Pathname, ACPI_WARN_ALWAYS, "Insufficient arguments - " "Caller passed %u, method requires %u", UserParamCount, AmlParamCount)); } else if (UserParamCount > AmlParamCount) { ACPI_INFO_PREDEFINED ((AE_INFO, Pathname, ACPI_WARN_ALWAYS, "Excess arguments - " "Caller passed %u, method requires %u", UserParamCount, AmlParamCount)); } return; } /* * This is a predefined name. Validate the user-supplied parameter * count against the ACPI specification. We don't validate against * the method itself because what is important here is that the * caller is in conformance with the spec. (The arg count for the * method was checked against the ACPI spec earlier.) * * Some methods are allowed to have a "minimum" number of args (_SCP) * because their definition in ACPI has changed over time. */ RequiredParamCount = METHOD_GET_ARG_COUNT (Predefined->Info.ArgumentList); if (UserParamCount < RequiredParamCount) { ACPI_WARN_PREDEFINED ((AE_INFO, Pathname, ACPI_WARN_ALWAYS, "Insufficient arguments - " "Caller passed %u, ACPI requires %u", UserParamCount, RequiredParamCount)); } else if ((UserParamCount > RequiredParamCount) && !(Predefined->Info.ArgumentList & ARG_COUNT_IS_MINIMUM)) { ACPI_INFO_PREDEFINED ((AE_INFO, Pathname, ACPI_WARN_ALWAYS, "Excess arguments - " "Caller passed %u, ACPI requires %u", UserParamCount, RequiredParamCount)); } }