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kolibrios/drivers/devman/acpica/compiler/aslanalyze.c

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acpica library git-svn-id: svn://kolibrios.org@1498 a494cfbc-eb01-0410-851d-a64ba20cac60
2010-06-18 16:39:07 +02:00
/******************************************************************************
*
* Module Name: aslanalyze.c - check for semantic errors
*
*****************************************************************************/
/******************************************************************************
*
* 1. Copyright Notice
*
* Some or all of this work - Copyright (c) 1999 - 2010, 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.
*
*****************************************************************************/
#include "aslcompiler.h"
#include "aslcompiler.y.h"
#include "acparser.h"
#include "amlcode.h"
#define _COMPONENT ACPI_COMPILER
ACPI_MODULE_NAME ("aslanalyze")
/* Local prototypes */
static UINT32
AnMapArgTypeToBtype (
UINT32 ArgType);
static UINT32
AnMapEtypeToBtype (
UINT32 Etype);
static void
AnFormatBtype (
char *Buffer,
UINT32 Btype);
static UINT32
AnGetBtype (
ACPI_PARSE_OBJECT *Op);
static UINT32
AnMapObjTypeToBtype (
ACPI_PARSE_OBJECT *Op);
static BOOLEAN
AnLastStatementIsReturn (
ACPI_PARSE_OBJECT *Op);
static void
AnCheckMethodReturnValue (
ACPI_PARSE_OBJECT *Op,
const ACPI_OPCODE_INFO *OpInfo,
ACPI_PARSE_OBJECT *ArgOp,
UINT32 RequiredBtypes,
UINT32 ThisNodeBtype);
static BOOLEAN
AnIsInternalMethod (
ACPI_PARSE_OBJECT *Op);
static UINT32
AnGetInternalMethodReturnType (
ACPI_PARSE_OBJECT *Op);
BOOLEAN
AnIsResultUsed (
ACPI_PARSE_OBJECT *Op);
/*******************************************************************************
*
* FUNCTION: AnIsInternalMethod
*
* PARAMETERS: Op - Current op
*
* RETURN: Boolean
*
* DESCRIPTION: Check for an internal control method.
*
******************************************************************************/
static BOOLEAN
AnIsInternalMethod (
ACPI_PARSE_OBJECT *Op)
{
if ((!ACPI_STRCMP (Op->Asl.ExternalName, "\\_OSI")) ||
(!ACPI_STRCMP (Op->Asl.ExternalName, "_OSI")))
{
return (TRUE);
}
return (FALSE);
}
/*******************************************************************************
*
* FUNCTION: AnGetInternalMethodReturnType
*
* PARAMETERS: Op - Current op
*
* RETURN: Btype
*
* DESCRIPTION: Get the return type of an internal method
*
******************************************************************************/
static UINT32
AnGetInternalMethodReturnType (
ACPI_PARSE_OBJECT *Op)
{
if ((!ACPI_STRCMP (Op->Asl.ExternalName, "\\_OSI")) ||
(!ACPI_STRCMP (Op->Asl.ExternalName, "_OSI")))
{
return (ACPI_BTYPE_STRING);
}
return (0);
}
/*******************************************************************************
*
* FUNCTION: AnMapArgTypeToBtype
*
* PARAMETERS: ArgType - The ARGI required type(s) for this argument,
* from the opcode info table
*
* RETURN: The corresponding Bit-encoded types
*
* DESCRIPTION: Convert an encoded ARGI required argument type code into a
* bitfield type code. Implements the implicit source conversion
* rules.
*
******************************************************************************/
static UINT32
AnMapArgTypeToBtype (
UINT32 ArgType)
{
switch (ArgType)
{
/* Simple types */
case ARGI_ANYTYPE:
return (ACPI_BTYPE_OBJECTS_AND_REFS);
case ARGI_PACKAGE:
return (ACPI_BTYPE_PACKAGE);
case ARGI_EVENT:
return (ACPI_BTYPE_EVENT);
case ARGI_MUTEX:
return (ACPI_BTYPE_MUTEX);
case ARGI_DDBHANDLE:
/*
* DDBHandleObject := SuperName
* ACPI_BTYPE_REFERENCE: Index reference as parameter of Load/Unload
*/
return (ACPI_BTYPE_DDB_HANDLE | ACPI_BTYPE_REFERENCE);
/* Interchangeable types */
/*
* Source conversion rules:
* Integer, String, and Buffer are all interchangeable
*/
case ARGI_INTEGER:
case ARGI_STRING:
case ARGI_BUFFER:
case ARGI_BUFFER_OR_STRING:
case ARGI_COMPUTEDATA:
return (ACPI_BTYPE_COMPUTE_DATA);
/* References */
case ARGI_INTEGER_REF:
return (ACPI_BTYPE_INTEGER);
case ARGI_OBJECT_REF:
return (ACPI_BTYPE_ALL_OBJECTS);
case ARGI_DEVICE_REF:
return (ACPI_BTYPE_DEVICE_OBJECTS);
case ARGI_REFERENCE:
return (ACPI_BTYPE_REFERENCE);
case ARGI_TARGETREF:
case ARGI_FIXED_TARGET:
case ARGI_SIMPLE_TARGET:
return (ACPI_BTYPE_OBJECTS_AND_REFS);
/* Complex types */
case ARGI_DATAOBJECT:
/*
* Buffer, string, package or reference to a Op -
* Used only by SizeOf operator
*/
return (ACPI_BTYPE_STRING | ACPI_BTYPE_BUFFER |
ACPI_BTYPE_PACKAGE | ACPI_BTYPE_REFERENCE);
case ARGI_COMPLEXOBJ:
/* Buffer, String, or package */
return (ACPI_BTYPE_STRING | ACPI_BTYPE_BUFFER | ACPI_BTYPE_PACKAGE);
case ARGI_REF_OR_STRING:
return (ACPI_BTYPE_STRING | ACPI_BTYPE_REFERENCE);
case ARGI_REGION_OR_BUFFER:
/* Used by Load() only. Allow buffers in addition to regions/fields */
return (ACPI_BTYPE_REGION | ACPI_BTYPE_BUFFER | ACPI_BTYPE_FIELD_UNIT);
case ARGI_DATAREFOBJ:
return (ACPI_BTYPE_INTEGER |ACPI_BTYPE_STRING | ACPI_BTYPE_BUFFER |
ACPI_BTYPE_PACKAGE | ACPI_BTYPE_REFERENCE | ACPI_BTYPE_DDB_HANDLE);
default:
break;
}
return (ACPI_BTYPE_OBJECTS_AND_REFS);
}
/*******************************************************************************
*
* FUNCTION: AnMapEtypeToBtype
*
* PARAMETERS: Etype - Encoded ACPI Type
*
* RETURN: Btype corresponding to the Etype
*
* DESCRIPTION: Convert an encoded ACPI type to a bitfield type applying the
* operand conversion rules. In other words, returns the type(s)
* this Etype is implicitly converted to during interpretation.
*
******************************************************************************/
static UINT32
AnMapEtypeToBtype (
UINT32 Etype)
{
if (Etype == ACPI_TYPE_ANY)
{
return ACPI_BTYPE_OBJECTS_AND_REFS;
}
/* Try the standard ACPI data types */
if (Etype <= ACPI_TYPE_EXTERNAL_MAX)
{
/*
* This switch statement implements the allowed operand conversion
* rules as per the "ASL Data Types" section of the ACPI
* specification.
*/
switch (Etype)
{
case ACPI_TYPE_INTEGER:
return (ACPI_BTYPE_COMPUTE_DATA | ACPI_BTYPE_DDB_HANDLE);
case ACPI_TYPE_STRING:
case ACPI_TYPE_BUFFER:
return (ACPI_BTYPE_COMPUTE_DATA);
case ACPI_TYPE_PACKAGE:
return (ACPI_BTYPE_PACKAGE);
case ACPI_TYPE_FIELD_UNIT:
return (ACPI_BTYPE_COMPUTE_DATA | ACPI_BTYPE_FIELD_UNIT);
case ACPI_TYPE_BUFFER_FIELD:
return (ACPI_BTYPE_COMPUTE_DATA | ACPI_BTYPE_BUFFER_FIELD);
case ACPI_TYPE_DDB_HANDLE:
return (ACPI_BTYPE_INTEGER | ACPI_BTYPE_DDB_HANDLE);
case ACPI_BTYPE_DEBUG_OBJECT:
/* Cannot be used as a source operand */
return (0);
default:
return (1 << (Etype - 1));
}
}
/* Try the internal data types */
switch (Etype)
{
case ACPI_TYPE_LOCAL_REGION_FIELD:
case ACPI_TYPE_LOCAL_BANK_FIELD:
case ACPI_TYPE_LOCAL_INDEX_FIELD:
/* Named fields can be either Integer/Buffer/String */
return (ACPI_BTYPE_COMPUTE_DATA | ACPI_BTYPE_FIELD_UNIT);
case ACPI_TYPE_LOCAL_ALIAS:
return (ACPI_BTYPE_INTEGER);
case ACPI_TYPE_LOCAL_RESOURCE:
case ACPI_TYPE_LOCAL_RESOURCE_FIELD:
return (ACPI_BTYPE_REFERENCE);
default:
printf ("Unhandled encoded type: %X\n", Etype);
return (0);
}
}
/*******************************************************************************
*
* FUNCTION: AnFormatBtype
*
* PARAMETERS: Btype - Bitfield of ACPI types
* Buffer - Where to put the ascii string
*
* RETURN: None.
*
* DESCRIPTION: Convert a Btype to a string of ACPI types
*
******************************************************************************/
static void
AnFormatBtype (
char *Buffer,
UINT32 Btype)
{
UINT32 Type;
BOOLEAN First = TRUE;
*Buffer = 0;
if (Btype == 0)
{
strcat (Buffer, "NoReturnValue");
return;
}
for (Type = 1; Type <= ACPI_TYPE_EXTERNAL_MAX; Type++)
{
if (Btype & 0x00000001)
{
if (!First)
{
strcat (Buffer, "|");
}
First = FALSE;
strcat (Buffer, AcpiUtGetTypeName (Type));
}
Btype >>= 1;
}
if (Btype & 0x00000001)
{
if (!First)
{
strcat (Buffer, "|");
}
First = FALSE;
strcat (Buffer, "Reference");
}
Btype >>= 1;
if (Btype & 0x00000001)
{
if (!First)
{
strcat (Buffer, "|");
}
First = FALSE;
strcat (Buffer, "Resource");
}
}
/*******************************************************************************
*
* FUNCTION: AnGetBtype
*
* PARAMETERS: Op - Parse node whose type will be returned.
*
* RETURN: The Btype associated with the Op.
*
* DESCRIPTION: Get the (bitfield) ACPI type associated with the parse node.
* Handles the case where the node is a name or method call and
* the actual type must be obtained from the namespace node.
*
******************************************************************************/
static UINT32
AnGetBtype (
ACPI_PARSE_OBJECT *Op)
{
ACPI_NAMESPACE_NODE *Node;
ACPI_PARSE_OBJECT *ReferencedNode;
UINT32 ThisNodeBtype = 0;
if ((Op->Asl.ParseOpcode == PARSEOP_NAMESEG) ||
(Op->Asl.ParseOpcode == PARSEOP_NAMESTRING) ||
(Op->Asl.ParseOpcode == PARSEOP_METHODCALL))
{
Node = Op->Asl.Node;
if (!Node)
{
DbgPrint (ASL_DEBUG_OUTPUT,
"No attached Nsnode: [%s] at line %u name [%s], ignoring typecheck\n",
Op->Asl.ParseOpName, Op->Asl.LineNumber,
Op->Asl.ExternalName);
return ACPI_UINT32_MAX;
}
ThisNodeBtype = AnMapEtypeToBtype (Node->Type);
if (!ThisNodeBtype)
{
AslError (ASL_ERROR, ASL_MSG_COMPILER_INTERNAL, Op,
"could not map type");
}
/*
* Since it was a named reference, enable the
* reference bit also
*/
ThisNodeBtype |= ACPI_BTYPE_REFERENCE;
if (Op->Asl.ParseOpcode == PARSEOP_METHODCALL)
{
ReferencedNode = Node->Op;
if (!ReferencedNode)
{
/* Check for an internal method */
if (AnIsInternalMethod (Op))
{
return (AnGetInternalMethodReturnType (Op));
}
AslError (ASL_ERROR, ASL_MSG_COMPILER_INTERNAL, Op,
"null Op pointer");
return ACPI_UINT32_MAX;
}
if (ReferencedNode->Asl.CompileFlags & NODE_METHOD_TYPED)
{
ThisNodeBtype = ReferencedNode->Asl.AcpiBtype;
}
else
{
return (ACPI_UINT32_MAX -1);
}
}
}
else
{
ThisNodeBtype = Op->Asl.AcpiBtype;
}
return (ThisNodeBtype);
}
/*******************************************************************************
*
* FUNCTION: AnMapObjTypeToBtype
*
* PARAMETERS: Op - A parse node
*
* RETURN: A Btype
*
* DESCRIPTION: Map object to the associated "Btype"
*
******************************************************************************/
static UINT32
AnMapObjTypeToBtype (
ACPI_PARSE_OBJECT *Op)
{
switch (Op->Asl.ParseOpcode)
{
case PARSEOP_OBJECTTYPE_BFF: /* "BuffFieldObj" */
return (ACPI_BTYPE_BUFFER_FIELD);
case PARSEOP_OBJECTTYPE_BUF: /* "BuffObj" */
return (ACPI_BTYPE_BUFFER);
case PARSEOP_OBJECTTYPE_DDB: /* "DDBHandleObj" */
return (ACPI_BTYPE_DDB_HANDLE);
case PARSEOP_OBJECTTYPE_DEV: /* "DeviceObj" */
return (ACPI_BTYPE_DEVICE);
case PARSEOP_OBJECTTYPE_EVT: /* "EventObj" */
return (ACPI_BTYPE_EVENT);
case PARSEOP_OBJECTTYPE_FLD: /* "FieldUnitObj" */
return (ACPI_BTYPE_FIELD_UNIT);
case PARSEOP_OBJECTTYPE_INT: /* "IntObj" */
return (ACPI_BTYPE_INTEGER);
case PARSEOP_OBJECTTYPE_MTH: /* "MethodObj" */
return (ACPI_BTYPE_METHOD);
case PARSEOP_OBJECTTYPE_MTX: /* "MutexObj" */
return (ACPI_BTYPE_MUTEX);
case PARSEOP_OBJECTTYPE_OPR: /* "OpRegionObj" */
return (ACPI_BTYPE_REGION);
case PARSEOP_OBJECTTYPE_PKG: /* "PkgObj" */
return (ACPI_BTYPE_PACKAGE);
case PARSEOP_OBJECTTYPE_POW: /* "PowerResObj" */
return (ACPI_BTYPE_POWER);
case PARSEOP_OBJECTTYPE_STR: /* "StrObj" */
return (ACPI_BTYPE_STRING);
case PARSEOP_OBJECTTYPE_THZ: /* "ThermalZoneObj" */
return (ACPI_BTYPE_THERMAL);
case PARSEOP_OBJECTTYPE_UNK: /* "UnknownObj" */
return (ACPI_BTYPE_OBJECTS_AND_REFS);
default:
return (0);
}
}
/*******************************************************************************
*
* FUNCTION: AnMethodAnalysisWalkBegin
*
* PARAMETERS: ASL_WALK_CALLBACK
*
* RETURN: Status
*
* DESCRIPTION: Descending callback for the analysis walk. Check methods for:
* 1) Initialized local variables
* 2) Valid arguments
* 3) Return types
*
******************************************************************************/
ACPI_STATUS
AnMethodAnalysisWalkBegin (
ACPI_PARSE_OBJECT *Op,
UINT32 Level,
void *Context)
{
ASL_ANALYSIS_WALK_INFO *WalkInfo = (ASL_ANALYSIS_WALK_INFO *) Context;
ASL_METHOD_INFO *MethodInfo = WalkInfo->MethodStack;
ACPI_PARSE_OBJECT *Next;
UINT32 RegisterNumber;
UINT32 i;
char LocalName[] = "Local0";
char ArgName[] = "Arg0";
ACPI_PARSE_OBJECT *ArgNode;
ACPI_PARSE_OBJECT *NextType;
ACPI_PARSE_OBJECT *NextParamType;
UINT8 ActualArgs = 0;
switch (Op->Asl.ParseOpcode)
{
case PARSEOP_METHOD:
TotalMethods++;
/* Create and init method info */
MethodInfo = UtLocalCalloc (sizeof (ASL_METHOD_INFO));
MethodInfo->Next = WalkInfo->MethodStack;
MethodInfo->Op = Op;
WalkInfo->MethodStack = MethodInfo;
/* Get the name node, ignored here */
Next = Op->Asl.Child;
/* Get the NumArguments node */
Next = Next->Asl.Next;
MethodInfo->NumArguments = (UINT8)
(((UINT8) Next->Asl.Value.Integer) & 0x07);
/* Get the SerializeRule and SyncLevel nodes, ignored here */
Next = Next->Asl.Next;
Next = Next->Asl.Next;
ArgNode = Next;
/* Get the ReturnType node */
Next = Next->Asl.Next;
NextType = Next->Asl.Child;
while (NextType)
{
/* Get and map each of the ReturnTypes */
MethodInfo->ValidReturnTypes |= AnMapObjTypeToBtype (NextType);
NextType->Asl.ParseOpcode = PARSEOP_DEFAULT_ARG;
NextType = NextType->Asl.Next;
}
/* Get the ParameterType node */
Next = Next->Asl.Next;
NextType = Next->Asl.Child;
while (NextType)
{
if (NextType->Asl.ParseOpcode == PARSEOP_DEFAULT_ARG)
{
NextParamType = NextType->Asl.Child;
while (NextParamType)
{
MethodInfo->ValidArgTypes[ActualArgs] |= AnMapObjTypeToBtype (NextParamType);
NextParamType->Asl.ParseOpcode = PARSEOP_DEFAULT_ARG;
NextParamType = NextParamType->Asl.Next;
}
}
else
{
MethodInfo->ValidArgTypes[ActualArgs] =
AnMapObjTypeToBtype (NextType);
NextType->Asl.ParseOpcode = PARSEOP_DEFAULT_ARG;
ActualArgs++;
}
NextType = NextType->Asl.Next;
}
if ((MethodInfo->NumArguments) &&
(MethodInfo->NumArguments != ActualArgs))
{
/* error: Param list did not match number of args */
}
/* Allow numarguments == 0 for Function() */
if ((!MethodInfo->NumArguments) && (ActualArgs))
{
MethodInfo->NumArguments = ActualArgs;
ArgNode->Asl.Value.Integer |= ActualArgs;
}
/*
* Actual arguments are initialized at method entry.
* All other ArgX "registers" can be used as locals, so we
* track their initialization.
*/
for (i = 0; i < MethodInfo->NumArguments; i++)
{
MethodInfo->ArgInitialized[i] = TRUE;
}
break;
case PARSEOP_METHODCALL:
if (MethodInfo &&
(Op->Asl.Node == MethodInfo->Op->Asl.Node))
{
AslError (ASL_REMARK, ASL_MSG_RECURSION, Op, Op->Asl.ExternalName);
}
break;
case PARSEOP_LOCAL0:
case PARSEOP_LOCAL1:
case PARSEOP_LOCAL2:
case PARSEOP_LOCAL3:
case PARSEOP_LOCAL4:
case PARSEOP_LOCAL5:
case PARSEOP_LOCAL6:
case PARSEOP_LOCAL7:
if (!MethodInfo)
{
/*
* Local was used outside a control method, or there was an error
* in the method declaration.
*/
AslError (ASL_REMARK, ASL_MSG_LOCAL_OUTSIDE_METHOD, Op, Op->Asl.ExternalName);
return (AE_ERROR);
}
RegisterNumber = (Op->Asl.AmlOpcode & 0x000F);
/*
* If the local is being used as a target, mark the local
* initialized
*/
if (Op->Asl.CompileFlags & NODE_IS_TARGET)
{
MethodInfo->LocalInitialized[RegisterNumber] = TRUE;
}
/*
* Otherwise, this is a reference, check if the local
* has been previously initialized.
*
* The only operator that accepts an uninitialized value is ObjectType()
*/
else if ((!MethodInfo->LocalInitialized[RegisterNumber]) &&
(Op->Asl.Parent->Asl.ParseOpcode != PARSEOP_OBJECTTYPE))
{
LocalName[strlen (LocalName) -1] = (char) (RegisterNumber + 0x30);
AslError (ASL_ERROR, ASL_MSG_LOCAL_INIT, Op, LocalName);
}
break;
case PARSEOP_ARG0:
case PARSEOP_ARG1:
case PARSEOP_ARG2:
case PARSEOP_ARG3:
case PARSEOP_ARG4:
case PARSEOP_ARG5:
case PARSEOP_ARG6:
if (!MethodInfo)
{
/*
* Arg was used outside a control method, or there was an error
* in the method declaration.
*/
AslError (ASL_REMARK, ASL_MSG_LOCAL_OUTSIDE_METHOD, Op, Op->Asl.ExternalName);
return (AE_ERROR);
}
RegisterNumber = (Op->Asl.AmlOpcode & 0x000F) - 8;
ArgName[strlen (ArgName) -1] = (char) (RegisterNumber + 0x30);
/*
* If the Arg is being used as a target, mark the local
* initialized
*/
if (Op->Asl.CompileFlags & NODE_IS_TARGET)
{
MethodInfo->ArgInitialized[RegisterNumber] = TRUE;
}
/*
* Otherwise, this is a reference, check if the Arg
* has been previously initialized.
*
* The only operator that accepts an uninitialized value is ObjectType()
*/
else if ((!MethodInfo->ArgInitialized[RegisterNumber]) &&
(Op->Asl.Parent->Asl.ParseOpcode != PARSEOP_OBJECTTYPE))
{
AslError (ASL_ERROR, ASL_MSG_ARG_INIT, Op, ArgName);
}
/* Flag this arg if it is not a "real" argument to the method */
if (RegisterNumber >= MethodInfo->NumArguments)
{
AslError (ASL_REMARK, ASL_MSG_NOT_PARAMETER, Op, ArgName);
}
break;
case PARSEOP_RETURN:
if (!MethodInfo)
{
/*
* Probably was an error in the method declaration,
* no additional error here
*/
ACPI_WARNING ((AE_INFO, "%p, No parent method", Op));
return (AE_ERROR);
}
/* Child indicates a return value */
if ((Op->Asl.Child) &&
(Op->Asl.Child->Asl.ParseOpcode != PARSEOP_DEFAULT_ARG))
{
MethodInfo->NumReturnWithValue++;
}
else
{
MethodInfo->NumReturnNoValue++;
}
break;
case PARSEOP_BREAK:
case PARSEOP_CONTINUE:
Next = Op->Asl.Parent;
while (Next)
{
if (Next->Asl.ParseOpcode == PARSEOP_WHILE)
{
break;
}
Next = Next->Asl.Parent;
}
if (!Next)
{
AslError (ASL_ERROR, ASL_MSG_NO_WHILE, Op, NULL);
}
break;
case PARSEOP_STALL:
/* We can range check if the argument is an integer */
if ((Op->Asl.Child->Asl.ParseOpcode == PARSEOP_INTEGER) &&
(Op->Asl.Child->Asl.Value.Integer > ACPI_UINT8_MAX))
{
AslError (ASL_ERROR, ASL_MSG_INVALID_TIME, Op, NULL);
}
break;
case PARSEOP_DEVICE:
case PARSEOP_EVENT:
case PARSEOP_MUTEX:
case PARSEOP_OPERATIONREGION:
case PARSEOP_POWERRESOURCE:
case PARSEOP_PROCESSOR:
case PARSEOP_THERMALZONE:
/*
* The first operand is a name to be created in the namespace.
* Check against the reserved list.
*/
i = ApCheckForPredefinedName (Op, Op->Asl.NameSeg);
if (i < ACPI_VALID_RESERVED_NAME_MAX)
{
AslError (ASL_ERROR, ASL_MSG_RESERVED_USE, Op, Op->Asl.ExternalName);
}
break;
case PARSEOP_NAME:
/* Typecheck any predefined names statically defined with Name() */
ApCheckForPredefinedObject (Op, Op->Asl.NameSeg);
/* Special typechecking for _HID */
if (!ACPI_STRCMP (METHOD_NAME__HID, Op->Asl.NameSeg))
{
Next = Op->Asl.Child->Asl.Next;
if (Next->Asl.ParseOpcode == PARSEOP_STRING_LITERAL)
{
/*
* _HID is a string, all characters must be alphanumeric.
* One of the things we want to catch here is the use of
* a leading asterisk in the string.
*/
for (i = 0; Next->Asl.Value.String[i]; i++)
{
if (!isalnum ((int) Next->Asl.Value.String[i]))
{
AslError (ASL_ERROR, ASL_MSG_ALPHANUMERIC_STRING,
Next, Next->Asl.Value.String);
break;
}
}
}
}
break;
default:
break;
}
return AE_OK;
}
/*******************************************************************************
*
* FUNCTION: AnLastStatementIsReturn
*
* PARAMETERS: Op - A method parse node
*
* RETURN: TRUE if last statement is an ASL RETURN. False otherwise
*
* DESCRIPTION: Walk down the list of top level statements within a method
* to find the last one. Check if that last statement is in
* fact a RETURN statement.
*
******************************************************************************/
static BOOLEAN
AnLastStatementIsReturn (
ACPI_PARSE_OBJECT *Op)
{
ACPI_PARSE_OBJECT *Next;
/*
* Check if last statement is a return
*/
Next = ASL_GET_CHILD_NODE (Op);
while (Next)
{
if ((!Next->Asl.Next) &&
(Next->Asl.ParseOpcode == PARSEOP_RETURN))
{
return TRUE;
}
Next = ASL_GET_PEER_NODE (Next);
}
return FALSE;
}
/*******************************************************************************
*
* FUNCTION: AnMethodAnalysisWalkEnd
*
* PARAMETERS: ASL_WALK_CALLBACK
*
* RETURN: Status
*
* DESCRIPTION: Ascending callback for analysis walk. Complete method
* return analysis.
*
******************************************************************************/
ACPI_STATUS
AnMethodAnalysisWalkEnd (
ACPI_PARSE_OBJECT *Op,
UINT32 Level,
void *Context)
{
ASL_ANALYSIS_WALK_INFO *WalkInfo = (ASL_ANALYSIS_WALK_INFO *) Context;
ASL_METHOD_INFO *MethodInfo = WalkInfo->MethodStack;
switch (Op->Asl.ParseOpcode)
{
case PARSEOP_METHOD:
case PARSEOP_RETURN:
if (!MethodInfo)
{
printf ("No method info for method! [%s]\n", Op->Asl.Namepath);
AslError (ASL_ERROR, ASL_MSG_COMPILER_INTERNAL, Op,
"No method info for this method");
CmCleanupAndExit ();
return (AE_AML_INTERNAL);
}
break;
default:
break;
}
switch (Op->Asl.ParseOpcode)
{
case PARSEOP_METHOD:
WalkInfo->MethodStack = MethodInfo->Next;
/*
* Check if there is no return statement at the end of the
* method AND we can actually get there -- i.e., the execution
* of the method can possibly terminate without a return statement.
*/
if ((!AnLastStatementIsReturn (Op)) &&
(!(Op->Asl.CompileFlags & NODE_HAS_NO_EXIT)))
{
/*
* No return statement, and execution can possibly exit
* via this path. This is equivalent to Return ()
*/
MethodInfo->NumReturnNoValue++;
}
/*
* Check for case where some return statements have a return value
* and some do not. Exit without a return statement is a return with
* no value
*/
if (MethodInfo->NumReturnNoValue &&
MethodInfo->NumReturnWithValue)
{
AslError (ASL_WARNING, ASL_MSG_RETURN_TYPES, Op,
Op->Asl.ExternalName);
}
/*
* If there are any RETURN() statements with no value, or there is a
* control path that allows the method to exit without a return value,
* we mark the method as a method that does not return a value. This
* knowledge can be used to check method invocations that expect a
* returned value.
*/
if (MethodInfo->NumReturnNoValue)
{
if (MethodInfo->NumReturnWithValue)
{
Op->Asl.CompileFlags |= NODE_METHOD_SOME_NO_RETVAL;
}
else
{
Op->Asl.CompileFlags |= NODE_METHOD_NO_RETVAL;
}
}
/*
* Check predefined method names for correct return behavior
* and correct number of arguments
*/
ApCheckForPredefinedMethod (Op, MethodInfo);
ACPI_FREE (MethodInfo);
break;
case PARSEOP_RETURN:
/*
* If the parent is a predefined method name, attempt to typecheck
* the return value. Only static types can be validated.
*/
ApCheckPredefinedReturnValue (Op, MethodInfo);
/*
* The parent block does not "exit" and continue execution -- the
* method is terminated here with the Return() statement.
*/
Op->Asl.Parent->Asl.CompileFlags |= NODE_HAS_NO_EXIT;
/* Used in the "typing" pass later */
Op->Asl.ParentMethod = MethodInfo->Op;
/*
* If there is a peer node after the return statement, then this
* node is unreachable code -- i.e., it won't be executed because of
* the preceeding Return() statement.
*/
if (Op->Asl.Next)
{
AslError (ASL_WARNING, ASL_MSG_UNREACHABLE_CODE, Op->Asl.Next, NULL);
}
break;
case PARSEOP_IF:
if ((Op->Asl.CompileFlags & NODE_HAS_NO_EXIT) &&
(Op->Asl.Next) &&
(Op->Asl.Next->Asl.ParseOpcode == PARSEOP_ELSE))
{
/*
* This IF has a corresponding ELSE. The IF block has no exit,
* (it contains an unconditional Return)
* mark the ELSE block to remember this fact.
*/
Op->Asl.Next->Asl.CompileFlags |= NODE_IF_HAS_NO_EXIT;
}
break;
case PARSEOP_ELSE:
if ((Op->Asl.CompileFlags & NODE_HAS_NO_EXIT) &&
(Op->Asl.CompileFlags & NODE_IF_HAS_NO_EXIT))
{
/*
* This ELSE block has no exit and the corresponding IF block
* has no exit either. Therefore, the parent node has no exit.
*/
Op->Asl.Parent->Asl.CompileFlags |= NODE_HAS_NO_EXIT;
}
break;
default:
if ((Op->Asl.CompileFlags & NODE_HAS_NO_EXIT) &&
(Op->Asl.Parent))
{
/* If this node has no exit, then the parent has no exit either */
Op->Asl.Parent->Asl.CompileFlags |= NODE_HAS_NO_EXIT;
}
break;
}
return AE_OK;
}
/*******************************************************************************
*
* FUNCTION: AnMethodTypingWalkBegin
*
* PARAMETERS: ASL_WALK_CALLBACK
*
* RETURN: Status
*
* DESCRIPTION: Descending callback for the typing walk.
*
******************************************************************************/
ACPI_STATUS
AnMethodTypingWalkBegin (
ACPI_PARSE_OBJECT *Op,
UINT32 Level,
void *Context)
{
return AE_OK;
}
/*******************************************************************************
*
* FUNCTION: AnMethodTypingWalkEnd
*
* PARAMETERS: ASL_WALK_CALLBACK
*
* RETURN: Status
*
* DESCRIPTION: Ascending callback for typing walk. Complete the method
* return analysis. Check methods for:
* 1) Initialized local variables
* 2) Valid arguments
* 3) Return types
*
******************************************************************************/
ACPI_STATUS
AnMethodTypingWalkEnd (
ACPI_PARSE_OBJECT *Op,
UINT32 Level,
void *Context)
{
UINT32 ThisNodeBtype;
switch (Op->Asl.ParseOpcode)
{
case PARSEOP_METHOD:
Op->Asl.CompileFlags |= NODE_METHOD_TYPED;
break;
case PARSEOP_RETURN:
if ((Op->Asl.Child) &&
(Op->Asl.Child->Asl.ParseOpcode != PARSEOP_DEFAULT_ARG))
{
ThisNodeBtype = AnGetBtype (Op->Asl.Child);
if ((Op->Asl.Child->Asl.ParseOpcode == PARSEOP_METHODCALL) &&
(ThisNodeBtype == (ACPI_UINT32_MAX -1)))
{
/*
* The called method is untyped at this time (typically a
* forward reference).
*
* Check for a recursive method call first.
*/
if (Op->Asl.ParentMethod != Op->Asl.Child->Asl.Node->Op)
{
/* We must type the method here */
TrWalkParseTree (Op->Asl.Child->Asl.Node->Op,
ASL_WALK_VISIT_TWICE, AnMethodTypingWalkBegin,
AnMethodTypingWalkEnd, NULL);
ThisNodeBtype = AnGetBtype (Op->Asl.Child);
}
}
/* Returns a value, save the value type */
if (Op->Asl.ParentMethod)
{
Op->Asl.ParentMethod->Asl.AcpiBtype |= ThisNodeBtype;
}
}
break;
default:
break;
}
return AE_OK;
}
/*******************************************************************************
*
* FUNCTION: AnCheckMethodReturnValue
*
* PARAMETERS: Op - Parent
* OpInfo - Parent info
* ArgOp - Method invocation op
* RequiredBtypes - What caller requires
* ThisNodeBtype - What this node returns (if anything)
*
* RETURN: None
*
* DESCRIPTION: Check a method invocation for 1) A return value and if it does
* in fact return a value, 2) check the type of the return value.
*
******************************************************************************/
static void
AnCheckMethodReturnValue (
ACPI_PARSE_OBJECT *Op,
const ACPI_OPCODE_INFO *OpInfo,
ACPI_PARSE_OBJECT *ArgOp,
UINT32 RequiredBtypes,
UINT32 ThisNodeBtype)
{
ACPI_PARSE_OBJECT *OwningOp;
ACPI_NAMESPACE_NODE *Node;
Node = ArgOp->Asl.Node;
/* Examine the parent op of this method */
OwningOp = Node->Op;
if (OwningOp->Asl.CompileFlags & NODE_METHOD_NO_RETVAL)
{
/* Method NEVER returns a value */
AslError (ASL_ERROR, ASL_MSG_NO_RETVAL, Op, Op->Asl.ExternalName);
}
else if (OwningOp->Asl.CompileFlags & NODE_METHOD_SOME_NO_RETVAL)
{
/* Method SOMETIMES returns a value, SOMETIMES not */
AslError (ASL_WARNING, ASL_MSG_SOME_NO_RETVAL, Op, Op->Asl.ExternalName);
}
else if (!(ThisNodeBtype & RequiredBtypes))
{
/* Method returns a value, but the type is wrong */
AnFormatBtype (StringBuffer, ThisNodeBtype);
AnFormatBtype (StringBuffer2, RequiredBtypes);
/*
* The case where the method does not return any value at all
* was already handled in the namespace cross reference
* -- Only issue an error if the method in fact returns a value,
* but it is of the wrong type
*/
if (ThisNodeBtype != 0)
{
sprintf (MsgBuffer,
"Method returns [%s], %s operator requires [%s]",
StringBuffer, OpInfo->Name, StringBuffer2);
AslError (ASL_ERROR, ASL_MSG_INVALID_TYPE, ArgOp, MsgBuffer);
}
}
}
/*******************************************************************************
*
* FUNCTION: AnOperandTypecheckWalkBegin
*
* PARAMETERS: ASL_WALK_CALLBACK
*
* RETURN: Status
*
* DESCRIPTION: Descending callback for the analysis walk. Check methods for:
* 1) Initialized local variables
* 2) Valid arguments
* 3) Return types
*
******************************************************************************/
ACPI_STATUS
AnOperandTypecheckWalkBegin (
ACPI_PARSE_OBJECT *Op,
UINT32 Level,
void *Context)
{
return AE_OK;
}
/*******************************************************************************
*
* FUNCTION: AnOperandTypecheckWalkEnd
*
* PARAMETERS: ASL_WALK_CALLBACK
*
* RETURN: Status
*
* DESCRIPTION: Ascending callback for analysis walk. Complete method
* return analysis.
*
******************************************************************************/
ACPI_STATUS
AnOperandTypecheckWalkEnd (
ACPI_PARSE_OBJECT *Op,
UINT32 Level,
void *Context)
{
const ACPI_OPCODE_INFO *OpInfo;
UINT32 RuntimeArgTypes;
UINT32 RuntimeArgTypes2;
UINT32 RequiredBtypes;
UINT32 ThisNodeBtype;
UINT32 CommonBtypes;
UINT32 OpcodeClass;
ACPI_PARSE_OBJECT *ArgOp;
UINT32 ArgType;
switch (Op->Asl.AmlOpcode)
{
case AML_RAW_DATA_BYTE:
case AML_RAW_DATA_WORD:
case AML_RAW_DATA_DWORD:
case AML_RAW_DATA_QWORD:
case AML_RAW_DATA_BUFFER:
case AML_RAW_DATA_CHAIN:
case AML_PACKAGE_LENGTH:
case AML_UNASSIGNED_OPCODE:
case AML_DEFAULT_ARG_OP:
/* Ignore the internal (compiler-only) AML opcodes */
return (AE_OK);
default:
break;
}
OpInfo = AcpiPsGetOpcodeInfo (Op->Asl.AmlOpcode);
if (!OpInfo)
{
return (AE_OK);
}
ArgOp = Op->Asl.Child;
RuntimeArgTypes = OpInfo->RuntimeArgs;
OpcodeClass = OpInfo->Class;
#ifdef ASL_ERROR_NAMED_OBJECT_IN_WHILE
/*
* Update 11/2008: In practice, we can't perform this check. A simple
* analysis is not sufficient. Also, it can cause errors when compiling
* disassembled code because of the way Switch operators are implemented
* (a While(One) loop with a named temp variable created within.)
*/
/*
* If we are creating a named object, check if we are within a while loop
* by checking if the parent is a WHILE op. This is a simple analysis, but
* probably sufficient for many cases.
*
* Allow Scope(), Buffer(), and Package().
*/
if (((OpcodeClass == AML_CLASS_NAMED_OBJECT) && (Op->Asl.AmlOpcode != AML_SCOPE_OP)) ||
((OpcodeClass == AML_CLASS_CREATE) && (OpInfo->Flags & AML_NSNODE)))
{
if (Op->Asl.Parent->Asl.AmlOpcode == AML_WHILE_OP)
{
AslError (ASL_ERROR, ASL_MSG_NAMED_OBJECT_IN_WHILE, Op, NULL);
}
}
#endif
/*
* Special case for control opcodes IF/RETURN/WHILE since they
* have no runtime arg list (at this time)
*/
switch (Op->Asl.AmlOpcode)
{
case AML_IF_OP:
case AML_WHILE_OP:
case AML_RETURN_OP:
if (ArgOp->Asl.ParseOpcode == PARSEOP_METHODCALL)
{
/* Check for an internal method */
if (AnIsInternalMethod (ArgOp))
{
return (AE_OK);
}
/* The lone arg is a method call, check it */
RequiredBtypes = AnMapArgTypeToBtype (ARGI_INTEGER);
if (Op->Asl.AmlOpcode == AML_RETURN_OP)
{
RequiredBtypes = 0xFFFFFFFF;
}
ThisNodeBtype = AnGetBtype (ArgOp);
if (ThisNodeBtype == ACPI_UINT32_MAX)
{
return (AE_OK);
}
AnCheckMethodReturnValue (Op, OpInfo, ArgOp,
RequiredBtypes, ThisNodeBtype);
}
return (AE_OK);
default:
break;
}
/* Ignore the non-executable opcodes */
if (RuntimeArgTypes == ARGI_INVALID_OPCODE)
{
return (AE_OK);
}
switch (OpcodeClass)
{
case AML_CLASS_EXECUTE:
case AML_CLASS_CREATE:
case AML_CLASS_CONTROL:
case AML_CLASS_RETURN_VALUE:
/* TBD: Change class or fix typechecking for these */
if ((Op->Asl.AmlOpcode == AML_BUFFER_OP) ||
(Op->Asl.AmlOpcode == AML_PACKAGE_OP) ||
(Op->Asl.AmlOpcode == AML_VAR_PACKAGE_OP))
{
break;
}
/* Reverse the runtime argument list */
RuntimeArgTypes2 = 0;
while ((ArgType = GET_CURRENT_ARG_TYPE (RuntimeArgTypes)))
{
RuntimeArgTypes2 <<= ARG_TYPE_WIDTH;
RuntimeArgTypes2 |= ArgType;
INCREMENT_ARG_LIST (RuntimeArgTypes);
}
while ((ArgType = GET_CURRENT_ARG_TYPE (RuntimeArgTypes2)))
{
RequiredBtypes = AnMapArgTypeToBtype (ArgType);
ThisNodeBtype = AnGetBtype (ArgOp);
if (ThisNodeBtype == ACPI_UINT32_MAX)
{
goto NextArgument;
}
/* Examine the arg based on the required type of the arg */
switch (ArgType)
{
case ARGI_TARGETREF:
if (ArgOp->Asl.ParseOpcode == PARSEOP_ZERO)
{
/* ZERO is the placeholder for "don't store result" */
ThisNodeBtype = RequiredBtypes;
break;
}
if (ArgOp->Asl.ParseOpcode == PARSEOP_INTEGER)
{
/*
* This is the case where an original reference to a resource
* descriptor field has been replaced by an (Integer) offset.
* These named fields are supported at compile-time only;
* the names are not passed to the interpreter (via the AML).
*/
if ((ArgOp->Asl.Node->Type == ACPI_TYPE_LOCAL_RESOURCE_FIELD) ||
(ArgOp->Asl.Node->Type == ACPI_TYPE_LOCAL_RESOURCE))
{
AslError (ASL_ERROR, ASL_MSG_RESOURCE_FIELD, ArgOp, NULL);
}
else
{
AslError (ASL_ERROR, ASL_MSG_INVALID_TYPE, ArgOp, NULL);
}
break;
}
if ((ArgOp->Asl.ParseOpcode == PARSEOP_METHODCALL) ||
(ArgOp->Asl.ParseOpcode == PARSEOP_DEREFOF))
{
break;
}
ThisNodeBtype = RequiredBtypes;
break;
case ARGI_REFERENCE: /* References */
case ARGI_INTEGER_REF:
case ARGI_OBJECT_REF:
case ARGI_DEVICE_REF:
switch (ArgOp->Asl.ParseOpcode)
{
case PARSEOP_LOCAL0:
case PARSEOP_LOCAL1:
case PARSEOP_LOCAL2:
case PARSEOP_LOCAL3:
case PARSEOP_LOCAL4:
case PARSEOP_LOCAL5:
case PARSEOP_LOCAL6:
case PARSEOP_LOCAL7:
/* TBD: implement analysis of current value (type) of the local */
/* For now, just treat any local as a typematch */
/*ThisNodeBtype = RequiredBtypes;*/
break;
case PARSEOP_ARG0:
case PARSEOP_ARG1:
case PARSEOP_ARG2:
case PARSEOP_ARG3:
case PARSEOP_ARG4:
case PARSEOP_ARG5:
case PARSEOP_ARG6:
/* Hard to analyze argument types, sow we won't */
/* For now, just treat any arg as a typematch */
/* ThisNodeBtype = RequiredBtypes; */
break;
case PARSEOP_DEBUG:
break;
case PARSEOP_REFOF:
case PARSEOP_INDEX:
default:
break;
}
break;
case ARGI_INTEGER:
default:
break;
}
CommonBtypes = ThisNodeBtype & RequiredBtypes;
if (ArgOp->Asl.ParseOpcode == PARSEOP_METHODCALL)
{
if (AnIsInternalMethod (ArgOp))
{
return (AE_OK);
}
/* Check a method call for a valid return value */
AnCheckMethodReturnValue (Op, OpInfo, ArgOp,
RequiredBtypes, ThisNodeBtype);
}
/*
* Now check if the actual type(s) match at least one
* bit to the required type
*/
else if (!CommonBtypes)
{
/* No match -- this is a type mismatch error */
AnFormatBtype (StringBuffer, ThisNodeBtype);
AnFormatBtype (StringBuffer2, RequiredBtypes);
sprintf (MsgBuffer, "[%s] found, %s operator requires [%s]",
StringBuffer, OpInfo->Name, StringBuffer2);
AslError (ASL_ERROR, ASL_MSG_INVALID_TYPE, ArgOp, MsgBuffer);
}
NextArgument:
ArgOp = ArgOp->Asl.Next;
INCREMENT_ARG_LIST (RuntimeArgTypes2);
}
break;
default:
break;
}
return (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: AnIsResultUsed
*
* PARAMETERS: Op - Parent op for the operator
*
* RETURN: TRUE if result from this operation is actually consumed
*
* DESCRIPTION: Determine if the function result value from an operator is
* used.
*
******************************************************************************/
BOOLEAN
AnIsResultUsed (
ACPI_PARSE_OBJECT *Op)
{
ACPI_PARSE_OBJECT *Parent;
switch (Op->Asl.ParseOpcode)
{
case PARSEOP_INCREMENT:
case PARSEOP_DECREMENT:
/* These are standalone operators, no return value */
return (TRUE);
default:
break;
}
/* Examine parent to determine if the return value is used */
Parent = Op->Asl.Parent;
switch (Parent->Asl.ParseOpcode)
{
/* If/While - check if the operator is the predicate */
case PARSEOP_IF:
case PARSEOP_WHILE:
/* First child is the predicate */
if (Parent->Asl.Child == Op)
{
return (TRUE);
}
return (FALSE);
/* Not used if one of these is the parent */
case PARSEOP_METHOD:
case PARSEOP_DEFINITIONBLOCK:
case PARSEOP_ELSE:
return (FALSE);
default:
/* Any other type of parent means that the result is used */
return (TRUE);
}
}
/*******************************************************************************
*
* FUNCTION: AnOtherSemanticAnalysisWalkBegin
*
* PARAMETERS: ASL_WALK_CALLBACK
*
* RETURN: Status
*
* DESCRIPTION: Descending callback for the analysis walk. Checks for
* miscellaneous issues in the code.
*
******************************************************************************/
ACPI_STATUS
AnOtherSemanticAnalysisWalkBegin (
ACPI_PARSE_OBJECT *Op,
UINT32 Level,
void *Context)
{
ACPI_PARSE_OBJECT *ArgNode;
ACPI_PARSE_OBJECT *PrevArgNode = NULL;
const ACPI_OPCODE_INFO *OpInfo;
OpInfo = AcpiPsGetOpcodeInfo (Op->Asl.AmlOpcode);
/*
* Determine if an execution class operator actually does something by
* checking if it has a target and/or the function return value is used.
* (Target is optional, so a standalone statement can actually do nothing.)
*/
if ((OpInfo->Class == AML_CLASS_EXECUTE) &&
(OpInfo->Flags & AML_HAS_RETVAL) &&
(!AnIsResultUsed (Op)))
{
if (OpInfo->Flags & AML_HAS_TARGET)
{
/*
* Find the target node, it is always the last child. If the traget
* is not specified in the ASL, a default node of type Zero was
* created by the parser.
*/
ArgNode = Op->Asl.Child;
while (ArgNode->Asl.Next)
{
PrevArgNode = ArgNode;
ArgNode = ArgNode->Asl.Next;
}
/* Divide() is the only weird case, it has two targets */
if (Op->Asl.AmlOpcode == AML_DIVIDE_OP)
{
if ((ArgNode->Asl.ParseOpcode == PARSEOP_ZERO) &&
(PrevArgNode->Asl.ParseOpcode == PARSEOP_ZERO))
{
AslError (ASL_WARNING, ASL_MSG_RESULT_NOT_USED, Op, Op->Asl.ExternalName);
}
}
else if (ArgNode->Asl.ParseOpcode == PARSEOP_ZERO)
{
AslError (ASL_WARNING, ASL_MSG_RESULT_NOT_USED, Op, Op->Asl.ExternalName);
}
}
else
{
/*
* Has no target and the result is not used. Only a couple opcodes
* can have this combination.
*/
switch (Op->Asl.ParseOpcode)
{
case PARSEOP_ACQUIRE:
case PARSEOP_WAIT:
case PARSEOP_LOADTABLE:
break;
default:
AslError (ASL_WARNING, ASL_MSG_RESULT_NOT_USED, Op, Op->Asl.ExternalName);
break;
}
}
}
/*
* Semantic checks for individual ASL operators
*/
switch (Op->Asl.ParseOpcode)
{
case PARSEOP_ACQUIRE:
case PARSEOP_WAIT:
/*
* Emit a warning if the timeout parameter for these operators is not
* ACPI_WAIT_FOREVER, and the result value from the operator is not
* checked, meaning that a timeout could happen, but the code
* would not know about it.
*/
/* First child is the namepath, 2nd child is timeout */
ArgNode = Op->Asl.Child;
ArgNode = ArgNode->Asl.Next;
/*
* Check for the WAIT_FOREVER case - defined by the ACPI spec to be
* 0xFFFF or greater
*/
if (((ArgNode->Asl.ParseOpcode == PARSEOP_WORDCONST) ||
(ArgNode->Asl.ParseOpcode == PARSEOP_INTEGER)) &&
(ArgNode->Asl.Value.Integer >= (UINT64) ACPI_WAIT_FOREVER))
{
break;
}
/*
* The operation could timeout. If the return value is not used
* (indicates timeout occurred), issue a warning
*/
if (!AnIsResultUsed (Op))
{
AslError (ASL_WARNING, ASL_MSG_TIMEOUT, ArgNode, Op->Asl.ExternalName);
}
break;
case PARSEOP_CREATEFIELD:
/*
* Check for a zero Length (NumBits) operand. NumBits is the 3rd operand
*/
ArgNode = Op->Asl.Child;
ArgNode = ArgNode->Asl.Next;
ArgNode = ArgNode->Asl.Next;
if ((ArgNode->Asl.ParseOpcode == PARSEOP_ZERO) ||
((ArgNode->Asl.ParseOpcode == PARSEOP_INTEGER) &&
(ArgNode->Asl.Value.Integer == 0)))
{
AslError (ASL_ERROR, ASL_MSG_NON_ZERO, ArgNode, NULL);
}
break;
default:
break;
}
return AE_OK;
}
/*******************************************************************************
*
* FUNCTION: AnOtherSemanticAnalysisWalkEnd
*
* PARAMETERS: ASL_WALK_CALLBACK
*
* RETURN: Status
*
* DESCRIPTION: Ascending callback for analysis walk. Complete method
* return analysis.
*
******************************************************************************/
ACPI_STATUS
AnOtherSemanticAnalysisWalkEnd (
ACPI_PARSE_OBJECT *Op,
UINT32 Level,
void *Context)
{
return AE_OK;
}
#ifdef ACPI_OBSOLETE_FUNCTIONS
/*******************************************************************************
*
* FUNCTION: AnMapBtypeToEtype
*
* PARAMETERS: Btype - Bitfield of ACPI types
*
* RETURN: The Etype corresponding the the Btype
*
* DESCRIPTION: Convert a bitfield type to an encoded type
*
******************************************************************************/
UINT32
AnMapBtypeToEtype (
UINT32 Btype)
{
UINT32 i;
UINT32 Etype;
if (Btype == 0)
{
return 0;
}
Etype = 1;
for (i = 1; i < Btype; i *= 2)
{
Etype++;
}
return (Etype);
}
#endif
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