static void
ApCustomPackage (
ACPI_PARSE_OBJECT *ParentOp,
const ACPI_PREDEFINED_INFO *Predefined)
{
ACPI_PARSE_OBJECT *Op;
UINT32 Count;
UINT32 ExpectedCount;
UINT32 Version;
/* First child is the package length */
Op = ParentOp->Asl.Child;
Count = (UINT32) Op->Asl.Value.Integer;
/* Get the version number, must be Integer */
Op = Op->Asl.Next;
Version = (UINT32) Op->Asl.Value.Integer;
if (Op->Asl.ParseOpcode != PARSEOP_INTEGER)
{
AslError (ASL_ERROR, ASL_MSG_RESERVED_OPERAND_TYPE, Op, MsgBuffer);
return;
}
/* Validate count (# of elements) */
ExpectedCount = 21; /* Version 1 */
if (Version == 0)
{
ExpectedCount = 20; /* Version 0 */
}
if (Count < ExpectedCount)
{
ApPackageTooSmall (Predefined->Info.Name, ParentOp,
Count, ExpectedCount);
return;
}
else if (Count > ExpectedCount)
{
ApPackageTooLarge (Predefined->Info.Name, ParentOp,
Count, ExpectedCount);
}
/* Validate all elements of the package */
Op = ApCheckPackageElements (Predefined->Info.Name, Op,
ACPI_RTYPE_INTEGER, 16,
ACPI_RTYPE_STRING, 4);
/* Version 1 has a single trailing integer */
if (Version > 0)
{
ApCheckPackageElements (Predefined->Info.Name, Op,
ACPI_RTYPE_INTEGER, 1, 0, 0);
}
}
static void
ApCheckPackageList (
const char *PredefinedName,
ACPI_PARSE_OBJECT *ParentOp,
const ACPI_PREDEFINED_INFO *Package,
UINT32 StartIndex,
UINT32 ParentCount)
{
ACPI_PARSE_OBJECT *SubPackageOp = ParentOp;
ACPI_PARSE_OBJECT *Op;
ACPI_STATUS Status;
UINT32 Count;
UINT32 ExpectedCount;
UINT32 i;
UINT32 j;
/*
* Validate each subpackage in the parent Package
*
* Note: We ignore NULL package elements on the assumption that
* they will be initialized by the BIOS or other ASL code.
*/
for (i = 0; (i < ParentCount) && SubPackageOp; i++)
{
/* Each object in the list must be of type Package */
Status = ApCheckObjectType (PredefinedName, SubPackageOp,
ACPI_RTYPE_PACKAGE, i + StartIndex);
if (ACPI_FAILURE (Status))
{
goto NextSubpackage;
}
/* Examine the different types of expected subpackages */
Op = SubPackageOp->Asl.Child;
/* First child is the package length */
Count = (UINT32) Op->Asl.Value.Integer;
Op = Op->Asl.Next;
/* The subpackage must have at least one element */
if (!Count)
{
ApZeroLengthPackage (PredefinedName, SubPackageOp);
goto NextSubpackage;
}
/*
* Decode the package type.
* PTYPE2 indicates that a "package of packages" is expected for
* this name. The various flavors of PTYPE2 indicate the number
* and format of the subpackages.
*/
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 (Count < ExpectedCount)
{
ApPackageTooSmall (PredefinedName, SubPackageOp,
Count, ExpectedCount);
break;
}
if (Count > ExpectedCount)
{
ApPackageTooLarge (PredefinedName, SubPackageOp,
Count, ExpectedCount);
break;
}
ApCheckPackageElements (PredefinedName, Op,
Package->RetInfo.ObjectType1, Package->RetInfo.Count1,
Package->RetInfo.ObjectType2, Package->RetInfo.Count2);
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 (Count < ExpectedCount)
{
ApPackageTooSmall (PredefinedName, SubPackageOp,
Count, ExpectedCount);
break;
}
ApCheckPackageElements (PredefinedName, Op,
Package->RetInfo.ObjectType1, Package->RetInfo.Count1,
Package->RetInfo.ObjectType2,
Count - Package->RetInfo.Count1);
break;
case ACPI_PTYPE2_FIXED:
/* Each subpackage has a fixed length */
ExpectedCount = Package->RetInfo2.Count;
if (Count < ExpectedCount)
{
ApPackageTooSmall (PredefinedName, SubPackageOp,
Count, ExpectedCount);
break;
}
if (Count > ExpectedCount)
{
ApPackageTooLarge (PredefinedName, SubPackageOp,
Count, ExpectedCount);
break;
}
/* Check each object/type combination */
for (j = 0; j < ExpectedCount; j++)
{
ApCheckObjectType (PredefinedName, Op,
Package->RetInfo2.ObjectType[j], j);
Op = Op->Asl.Next;
}
break;
case ACPI_PTYPE2_MIN:
/* Each subpackage has a variable but minimum length */
ExpectedCount = Package->RetInfo.Count1;
if (Count < ExpectedCount)
{
ApPackageTooSmall (PredefinedName, SubPackageOp,
Count, ExpectedCount);
break;
}
/* Check the type of each subpackage element */
ApCheckPackageElements (PredefinedName, Op,
Package->RetInfo.ObjectType1, Count, 0, 0);
break;
case ACPI_PTYPE2_COUNT:
/*
* First element is the (Integer) count of elements, including
* the count field (the ACPI name is NumElements)
*/
Status = ApCheckObjectType (PredefinedName, Op,
ACPI_RTYPE_INTEGER, 0);
/* We must have an integer count from above (otherwise, use Count) */
if (ACPI_SUCCESS (Status))
{
/*
* Make sure package is large enough for the Count and is
* is as large as the minimum size
*/
ExpectedCount = (UINT32) Op->Asl.Value.Integer;
if (Count < ExpectedCount)
{
ApPackageTooSmall (PredefinedName, SubPackageOp,
Count, ExpectedCount);
break;
}
else if (Count > ExpectedCount)
{
ApPackageTooLarge (PredefinedName, SubPackageOp,
Count, ExpectedCount);
}
/* Some names of this type have a minimum length */
if (Count < Package->RetInfo.Count1)
{
ExpectedCount = Package->RetInfo.Count1;
ApPackageTooSmall (PredefinedName, SubPackageOp,
Count, ExpectedCount);
break;
}
Count = ExpectedCount;
}
/* Check the type of each subpackage element */
Op = Op->Asl.Next;
ApCheckPackageElements (PredefinedName, Op,
Package->RetInfo.ObjectType1, (Count - 1), 0, 0);
break;
default:
break;
}
NextSubpackage:
SubPackageOp = SubPackageOp->Asl.Next;
}
}
void
ApCheckPackage (
ACPI_PARSE_OBJECT *ParentOp,
const ACPI_PREDEFINED_INFO *Predefined)
{
ACPI_PARSE_OBJECT *Op;
const ACPI_PREDEFINED_INFO *Package;
ACPI_STATUS Status;
UINT32 ExpectedCount;
UINT32 Count;
UINT32 i;
/* The package info for this name is in the next table entry */
Package = Predefined + 1;
/* First child is the package length */
Op = ParentOp->Asl.Child;
Count = (UINT32) Op->Asl.Value.Integer;
/*
* Many of the variable-length top-level packages are allowed to simply
* have zero elements. This allows the BIOS to tell the host that even
* though the predefined name/method exists, the feature is not supported.
* Other package types require one or more elements. In any case, there
* is no need to continue validation.
*/
if (!Count)
{
switch (Package->RetInfo.Type)
{
case ACPI_PTYPE1_FIXED:
case ACPI_PTYPE1_OPTION:
case ACPI_PTYPE2_PKG_COUNT:
case ACPI_PTYPE2_REV_FIXED:
ApZeroLengthPackage (Predefined->Info.Name, ParentOp);
break;
case ACPI_PTYPE1_VAR:
case ACPI_PTYPE2:
case ACPI_PTYPE2_COUNT:
case ACPI_PTYPE2_FIXED:
case ACPI_PTYPE2_MIN:
case ACPI_PTYPE2_FIX_VAR:
default:
break;
}
return;
}
/* Get the first element of the package */
Op = Op->Asl.Next;
/* Decode the package type */
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)
{
ApPackageTooLarge (Predefined->Info.Name, ParentOp,
Count, ExpectedCount);
}
/* Validate all elements of the package */
ApCheckPackageElements (Predefined->Info.Name, Op,
Package->RetInfo.ObjectType1, Package->RetInfo.Count1,
Package->RetInfo.ObjectType2, Package->RetInfo.Count2);
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++)
{
ApCheckObjectType (Predefined->Info.Name, Op,
Package->RetInfo.ObjectType1, i);
Op = Op->Asl.Next;
}
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) */
ApCheckObjectType (Predefined->Info.Name, Op,
Package->RetInfo3.ObjectType[i], i);
}
else
{
/* These are the optional package elements */
ApCheckObjectType (Predefined->Info.Name, Op,
Package->RetInfo3.TailObjectType, i);
}
Op = Op->Asl.Next;
}
break;
case ACPI_PTYPE2_REV_FIXED:
/* First element is the (Integer) revision */
ApCheckObjectType (Predefined->Info.Name, Op,
ACPI_RTYPE_INTEGER, 0);
Op = Op->Asl.Next;
Count--;
/* Examine the subpackages */
ApCheckPackageList (Predefined->Info.Name, Op,
Package, 1, Count);
break;
case ACPI_PTYPE2_PKG_COUNT:
/* First element is the (Integer) count of subpackages to follow */
Status = ApCheckObjectType (Predefined->Info.Name, Op,
ACPI_RTYPE_INTEGER, 0);
/* We must have an integer count from above (otherwise, use Count) */
if (ACPI_SUCCESS (Status))
{
/*
* Count cannot be larger than the parent package length, but
* allow it to be smaller. The >= accounts for the Integer above.
*/
ExpectedCount = (UINT32) Op->Asl.Value.Integer;
if (ExpectedCount >= Count)
{
goto PackageTooSmall;
}
Count = ExpectedCount;
}
Op = Op->Asl.Next;
/* Examine the subpackages */
ApCheckPackageList (Predefined->Info.Name, Op,
Package, 1, Count);
break;
case ACPI_PTYPE2_UUID_PAIR:
/* The package contains a variable list of UUID Buffer/Package pairs */
/* The length of the package must be even */
if (Count & 1)
{
sprintf (MsgBuffer, "%4.4s: Package length, %d, must be even.",
Predefined->Info.Name, Count);
AslError (ASL_ERROR, ASL_MSG_RESERVED_PACKAGE_LENGTH,
ParentOp->Asl.Child, MsgBuffer);
}
/* Validate the alternating types */
for (i = 0; i < Count; ++i)
{
if (i & 1)
{
ApCheckObjectType (Predefined->Info.Name, Op,
Package->RetInfo.ObjectType2, i);
}
else
{
ApCheckObjectType (Predefined->Info.Name, Op,
Package->RetInfo.ObjectType1, i);
}
Op = Op->Asl.Next;
}
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.
*/
/* Examine the subpackages */
ApCheckPackageList (Predefined->Info.Name, Op,
Package, 0, Count);
break;
default:
return;
}
return;
PackageTooSmall:
ApPackageTooSmall (Predefined->Info.Name, ParentOp,
Count, ExpectedCount);
}
