304 lines
11 KiB
C
304 lines
11 KiB
C
/******************************************************************************
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*
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* Module Name: nsarguments - Validation of args for ACPI predefined methods
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*
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*****************************************************************************/
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/*
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* Copyright (C) 2000 - 2014, Intel Corp.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer,
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* without modification.
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* 2. Redistributions in binary form must reproduce at minimum a disclaimer
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* substantially similar to the "NO WARRANTY" disclaimer below
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* ("Disclaimer") and any redistribution must be conditioned upon
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* including a substantially similar Disclaimer requirement for further
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* binary redistribution.
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* 3. Neither the names of the above-listed copyright holders nor the names
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* of any contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* NO WARRANTY
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGES.
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*/
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#include "acpi.h"
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#include "accommon.h"
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#include "acnamesp.h"
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#include "acpredef.h"
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#define _COMPONENT ACPI_NAMESPACE
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ACPI_MODULE_NAME ("nsarguments")
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/*******************************************************************************
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*
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* FUNCTION: AcpiNsCheckArgumentTypes
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*
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* PARAMETERS: Info - Method execution information block
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*
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* RETURN: None
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*
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* DESCRIPTION: Check the incoming argument count and all argument types
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* against the argument type list for a predefined name.
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*
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******************************************************************************/
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void
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AcpiNsCheckArgumentTypes (
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ACPI_EVALUATE_INFO *Info)
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{
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UINT16 ArgTypeList;
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UINT8 ArgCount;
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UINT8 ArgType;
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UINT8 UserArgType;
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UINT32 i;
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/* If not a predefined name, cannot typecheck args */
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if (!Info->Predefined)
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{
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return;
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}
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ArgTypeList = Info->Predefined->Info.ArgumentList;
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ArgCount = METHOD_GET_ARG_COUNT (ArgTypeList);
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/* Typecheck all arguments */
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for (i = 0; ((i < ArgCount) && (i < Info->ParamCount)); i++)
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{
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ArgType = METHOD_GET_NEXT_TYPE (ArgTypeList);
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UserArgType = Info->Parameters[i]->Common.Type;
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if (UserArgType != ArgType)
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{
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ACPI_WARN_PREDEFINED ((AE_INFO, Info->FullPathname, ACPI_WARN_ALWAYS,
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"Argument #%u type mismatch - "
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"Found [%s], ACPI requires [%s]", (i + 1),
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AcpiUtGetTypeName (UserArgType),
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AcpiUtGetTypeName (ArgType)));
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}
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}
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiNsCheckAcpiCompliance
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*
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* PARAMETERS: Pathname - Full pathname to the node (for error msgs)
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* Node - Namespace node for the method/object
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* Predefined - Pointer to entry in predefined name table
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*
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* RETURN: None
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*
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* DESCRIPTION: Check that the declared parameter count (in ASL/AML) for a
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* predefined name is what is expected (matches what is defined in
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* the ACPI specification for this predefined name.)
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*
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******************************************************************************/
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void
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AcpiNsCheckAcpiCompliance (
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char *Pathname,
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ACPI_NAMESPACE_NODE *Node,
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const ACPI_PREDEFINED_INFO *Predefined)
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{
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UINT32 AmlParamCount;
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UINT32 RequiredParamCount;
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if (!Predefined)
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{
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return;
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}
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/* Get the ACPI-required arg count from the predefined info table */
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RequiredParamCount = METHOD_GET_ARG_COUNT (Predefined->Info.ArgumentList);
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/*
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* If this object is not a control method, we can check if the ACPI
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* spec requires that it be a method.
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*/
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if (Node->Type != ACPI_TYPE_METHOD)
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{
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if (RequiredParamCount > 0)
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{
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/* Object requires args, must be implemented as a method */
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ACPI_BIOS_ERROR_PREDEFINED ((AE_INFO, Pathname, ACPI_WARN_ALWAYS,
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"Object (%s) must be a control method with %u arguments",
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AcpiUtGetTypeName (Node->Type), RequiredParamCount));
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}
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else if (!RequiredParamCount && !Predefined->Info.ExpectedBtypes)
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{
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/* Object requires no args and no return value, must be a method */
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ACPI_BIOS_ERROR_PREDEFINED ((AE_INFO, Pathname, ACPI_WARN_ALWAYS,
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"Object (%s) must be a control method "
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"with no arguments and no return value",
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AcpiUtGetTypeName (Node->Type)));
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}
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return;
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}
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/*
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* This is a control method.
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* Check that the ASL/AML-defined parameter count for this method
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* matches the ACPI-required parameter count
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*
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* Some methods are allowed to have a "minimum" number of args (_SCP)
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* because their definition in ACPI has changed over time.
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*
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* Note: These are BIOS errors in the declaration of the object
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*/
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AmlParamCount = Node->Object->Method.ParamCount;
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if (AmlParamCount < RequiredParamCount)
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{
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ACPI_BIOS_ERROR_PREDEFINED ((AE_INFO, Pathname, ACPI_WARN_ALWAYS,
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"Insufficient arguments - "
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"ASL declared %u, ACPI requires %u",
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AmlParamCount, RequiredParamCount));
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}
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else if ((AmlParamCount > RequiredParamCount) &&
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!(Predefined->Info.ArgumentList & ARG_COUNT_IS_MINIMUM))
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{
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ACPI_BIOS_ERROR_PREDEFINED ((AE_INFO, Pathname, ACPI_WARN_ALWAYS,
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"Excess arguments - "
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"ASL declared %u, ACPI requires %u",
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AmlParamCount, RequiredParamCount));
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}
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiNsCheckArgumentCount
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*
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* PARAMETERS: Pathname - Full pathname to the node (for error msgs)
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* Node - Namespace node for the method/object
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* UserParamCount - Number of args passed in by the caller
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* Predefined - Pointer to entry in predefined name table
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*
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* RETURN: None
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*
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* DESCRIPTION: Check that incoming argument count matches the declared
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* parameter count (in the ASL/AML) for an object.
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*
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******************************************************************************/
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void
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AcpiNsCheckArgumentCount (
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char *Pathname,
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ACPI_NAMESPACE_NODE *Node,
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UINT32 UserParamCount,
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const ACPI_PREDEFINED_INFO *Predefined)
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{
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UINT32 AmlParamCount;
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UINT32 RequiredParamCount;
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if (!Predefined)
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{
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/*
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* Not a predefined name. Check the incoming user argument count
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* against the count that is specified in the method/object.
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*/
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if (Node->Type != ACPI_TYPE_METHOD)
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{
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if (UserParamCount)
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{
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ACPI_INFO_PREDEFINED ((AE_INFO, Pathname, ACPI_WARN_ALWAYS,
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"%u arguments were passed to a non-method ACPI object (%s)",
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UserParamCount, AcpiUtGetTypeName (Node->Type)));
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}
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return;
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}
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/*
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* This is a control method. Check the parameter count.
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* We can only check the incoming argument count against the
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* argument count declared for the method in the ASL/AML.
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*
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* Emit a message if too few or too many arguments have been passed
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* by the caller.
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*
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* Note: Too many arguments will not cause the method to
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* fail. However, the method will fail if there are too few
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* arguments and the method attempts to use one of the missing ones.
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*/
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AmlParamCount = Node->Object->Method.ParamCount;
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if (UserParamCount < AmlParamCount)
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{
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ACPI_WARN_PREDEFINED ((AE_INFO, Pathname, ACPI_WARN_ALWAYS,
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"Insufficient arguments - "
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"Caller passed %u, method requires %u",
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UserParamCount, AmlParamCount));
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}
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else if (UserParamCount > AmlParamCount)
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{
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ACPI_INFO_PREDEFINED ((AE_INFO, Pathname, ACPI_WARN_ALWAYS,
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"Excess arguments - "
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"Caller passed %u, method requires %u",
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UserParamCount, AmlParamCount));
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}
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return;
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}
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/*
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* This is a predefined name. Validate the user-supplied parameter
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* count against the ACPI specification. We don't validate against
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* the method itself because what is important here is that the
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* caller is in conformance with the spec. (The arg count for the
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* method was checked against the ACPI spec earlier.)
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*
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* Some methods are allowed to have a "minimum" number of args (_SCP)
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* because their definition in ACPI has changed over time.
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*/
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RequiredParamCount = METHOD_GET_ARG_COUNT (Predefined->Info.ArgumentList);
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if (UserParamCount < RequiredParamCount)
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{
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ACPI_WARN_PREDEFINED ((AE_INFO, Pathname, ACPI_WARN_ALWAYS,
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"Insufficient arguments - "
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"Caller passed %u, ACPI requires %u",
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UserParamCount, RequiredParamCount));
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}
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else if ((UserParamCount > RequiredParamCount) &&
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!(Predefined->Info.ArgumentList & ARG_COUNT_IS_MINIMUM))
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{
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ACPI_INFO_PREDEFINED ((AE_INFO, Pathname, ACPI_WARN_ALWAYS,
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"Excess arguments - "
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"Caller passed %u, ACPI requires %u",
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UserParamCount, RequiredParamCount));
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}
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}
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