freebsd-dev/source/components/namespace/nsprepkg.c
2015-05-18 23:17:05 +00:00

685 lines
21 KiB
C

/******************************************************************************
*
* Module Name: nsprepkg - Validation of package objects for predefined names
*
*****************************************************************************/
/*
* Copyright (C) 2000 - 2015, Intel Corp.
* All rights reserved.
*
* 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.
*
* Alternatively, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2 as published by the Free
* Software Foundation.
*
* NO WARRANTY
* 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 MERCHANTIBILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* HOLDERS OR CONTRIBUTORS BE LIABLE FOR 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 DAMAGES.
*/
#include "acpi.h"
#include "accommon.h"
#include "acnamesp.h"
#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);
/*******************************************************************************
*
* 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_NAME (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 (AE_OK);
}
ACPI_WARN_PREDEFINED ((AE_INFO, Info->FullPathname, Info->NodeFlags,
"Return Package has no elements (empty)"));
return (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_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 (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 (Status);
}
}
else
{
/* These are the optional package elements */
Status = AcpiNsCheckObjectType (Info, Elements,
Package->RetInfo3.TailObjectType, i);
if (ACPI_FAILURE (Status))
{
return (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 (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 (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 (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 (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 (AE_AML_OPERAND_VALUE);
}
Status = AcpiNsCheckObjectType(Info, Elements + 1,
Package->RetInfo.ObjectType2, 0);
if (ACPI_FAILURE(Status))
{
return (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 (AE_AML_INTERNAL);
}
return (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 (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 */
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: 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;
/*
* 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 (Status);
}
ThisElement++;
}
for (i = 0; i < Count2; i++)
{
Status = AcpiNsCheckObjectType (Info, ThisElement,
Type2, (i + Count1 + StartIndex));
if (ACPI_FAILURE (Status))
{
return (Status);
}
ThisElement++;
}
return (AE_OK);
}