/******************************************************************************
*
* Module Name: aslwalks.c - Miscellaneous analytical parse tree walks
*
*****************************************************************************/
/*
* Copyright (C) 2000 - 2018, 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 "aslcompiler.h"
#include "aslcompiler.y.h"
#include "acparser.h"
#include "amlcode.h"
#define _COMPONENT ACPI_COMPILER
ACPI_MODULE_NAME ("aslwalks")
/* Local prototypes */
static void
AnAnalyzeStoreOperator (
ACPI_PARSE_OBJECT *Op);
/*******************************************************************************
*
* 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 ThisOpBtype;
switch (Op->Asl.ParseOpcode)
{
case PARSEOP_METHOD:
Op->Asl.CompileFlags |= OP_METHOD_TYPED;
break;
case PARSEOP_RETURN:
if ((Op->Asl.Child) &&
(Op->Asl.Child->Asl.ParseOpcode != PARSEOP_DEFAULT_ARG))
{
ThisOpBtype = AnGetBtype (Op->Asl.Child);
if ((Op->Asl.Child->Asl.ParseOpcode == PARSEOP_METHODCALL) &&
(ThisOpBtype == (ACPI_UINT32_MAX -1)))
{
/*
* The called method is untyped at this time (typically a
* forward reference).
*
* Check for a recursive method call first. Note: the
* Child->Node will be null if the method has not been
* resolved.
*/
if (Op->Asl.Child->Asl.Node &&
(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_UPWARD, NULL,
AnMethodTypingWalkEnd, NULL);
ThisOpBtype = AnGetBtype (Op->Asl.Child);
}
}
/* Returns a value, save the value type */
if (Op->Asl.ParentMethod)
{
Op->Asl.ParentMethod->Asl.AcpiBtype |= ThisOpBtype;
}
}
break;
default:
break;
}
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;
OpcodeClass = OpInfo->Class;
RuntimeArgTypes = OpInfo->RuntimeArgs;
#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);
case AML_EXTERNAL_OP:
/*
* Not really a "runtime" opcode since it used by disassembler only.
* The parser will find any issues with the operands.
*/
return (AE_OK);
default:
break;
}
/* Ignore the non-executable opcodes */
if (RuntimeArgTypes == ARGI_INVALID_OPCODE)
{
return (AE_OK);
}
/*
* Special handling for certain opcodes.
*/
switch (Op->Asl.AmlOpcode)
{
/* BankField has one TermArg */
case AML_BANK_FIELD_OP:
OpcodeClass = AML_CLASS_EXECUTE;
ArgOp = ArgOp->Asl.Next;
ArgOp = ArgOp->Asl.Next;
break;
/* Operation Region has 2 TermArgs */
case AML_REGION_OP:
OpcodeClass = AML_CLASS_EXECUTE;
ArgOp = ArgOp->Asl.Next;
ArgOp = ArgOp->Asl.Next;
break;
/* DataTableRegion has 3 TermArgs */
case AML_DATA_REGION_OP:
OpcodeClass = AML_CLASS_EXECUTE;
ArgOp = ArgOp->Asl.Next;
break;
/* Buffers/Packages have a length that is a TermArg */
case AML_BUFFER_OP:
case AML_PACKAGE_OP:
case AML_VARIABLE_PACKAGE_OP:
/* If length is a constant, we are done */
if ((ArgOp->Asl.ParseOpcode == PARSEOP_INTEGER) ||
(ArgOp->Asl.ParseOpcode == PARSEOP_RAW_DATA))
{
return (AE_OK);
}
break;
/* Store can write any object to the Debug object */
case AML_STORE_OP:
/*
* If this is a Store() to the Debug object, we don't need
* to perform any further validation -- because a Store of
* any object to Debug is permitted and supported.
*/
if (ArgOp->Asl.Next->Asl.AmlOpcode == AML_DEBUG_OP)
{
return (AE_OK);
}
break;
default:
break;
}
switch (OpcodeClass)
{
case AML_CLASS_EXECUTE:
case AML_CLASS_CREATE:
case AML_CLASS_CONTROL:
case AML_CLASS_RETURN_VALUE:
/* Reverse the runtime argument list */
RuntimeArgTypes2 = 0;
while ((ArgType = GET_CURRENT_ARG_TYPE (RuntimeArgTypes)))
{
RuntimeArgTypes2 <<= ARG_TYPE_WIDTH;
RuntimeArgTypes2 |= ArgType;
INCREMENT_ARG_LIST (RuntimeArgTypes);
}
/* Typecheck each argument */
while ((ArgType = GET_CURRENT_ARG_TYPE (RuntimeArgTypes2)))
{
/* Get the required type(s) for the argument */
RequiredBtypes = AnMapArgTypeToBtype (ArgType);
if (!ArgOp)
{
AslError (ASL_ERROR, ASL_MSG_COMPILER_INTERNAL, Op,
"Null ArgOp in argument loop");
AslAbort ();
}
/* Get the actual type of the argument */
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;
}
/* Fallthrough */
case ARGI_STORE_TARGET:
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;
#ifdef __FUTURE_IMPLEMENTATION
/*
* Possible future typechecking support
*/
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, so we won't */
/* for now. Just treat any arg as a typematch */
/* ThisNodeBtype = RequiredBtypes; */
break;
case PARSEOP_DEBUG:
case PARSEOP_REFOF:
case PARSEOP_INDEX:
default:
break;
}
break;
#endif
case ARGI_INTEGER:
default:
break;
}
/* Check for a type mismatch (required versus actual) */
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 */
int cnt;
char *strp;
AnFormatBtype (StringBuffer, ThisNodeBtype);
AnFormatBtype (StringBuffer2, RequiredBtypes);
cnt = asprintf (&strp, "[%s] found, %s operator requires [%s]",
StringBuffer, OpInfo->Name, StringBuffer2);
AslError (ASL_ERROR, ASL_MSG_INVALID_TYPE,
ArgOp, strp);
if (cnt > 0)
free(strp);
}
NextArgument:
ArgOp = ArgOp->Asl.Next;
INCREMENT_ARG_LIST (RuntimeArgTypes2);
}
break;
default:
break;
}
return (AE_OK);
}
/*******************************************************************************
*
* 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 *ArgOp;
ACPI_PARSE_OBJECT *PrevArgOp = NULL;
const ACPI_OPCODE_INFO *OpInfo;
ACPI_NAMESPACE_NODE *Node;
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 target
* is not specified in the ASL, a default node of type Zero was
* created by the parser.
*/
ArgOp = Op->Asl.Child;
while (ArgOp->Asl.Next)
{
PrevArgOp = ArgOp;
ArgOp = ArgOp->Asl.Next;
}
/* Divide() is the only weird case, it has two targets */
if (Op->Asl.AmlOpcode == AML_DIVIDE_OP)
{
if ((ArgOp->Asl.ParseOpcode == PARSEOP_ZERO) &&
(PrevArgOp) &&
(PrevArgOp->Asl.ParseOpcode == PARSEOP_ZERO))
{
AslError (ASL_ERROR, ASL_MSG_RESULT_NOT_USED,
Op, Op->Asl.ExternalName);
}
}
else if (ArgOp->Asl.ParseOpcode == PARSEOP_ZERO)
{
AslError (ASL_ERROR, 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_ERROR, ASL_MSG_RESULT_NOT_USED,
Op, Op->Asl.ExternalName);
break;
}
}
}
/*
* Semantic checks for individual ASL operators
*/
switch (Op->Asl.ParseOpcode)
{
case PARSEOP_STORE:
if (Gbl_DoTypechecking)
{
AnAnalyzeStoreOperator (Op);
}
break;
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 */
ArgOp = Op->Asl.Child;
ArgOp = ArgOp->Asl.Next;
/*
* Check for the WAIT_FOREVER case - defined by the ACPI spec to be
* 0xFFFF or greater
*/
if (((ArgOp->Asl.ParseOpcode == PARSEOP_WORDCONST) ||
(ArgOp->Asl.ParseOpcode == PARSEOP_INTEGER)) &&
(ArgOp->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, ArgOp,
Op->Asl.ExternalName);
}
break;
case PARSEOP_CREATEFIELD:
/*
* Check for a zero Length (NumBits) operand. NumBits is the 3rd operand
*/
ArgOp = Op->Asl.Child;
ArgOp = ArgOp->Asl.Next;
ArgOp = ArgOp->Asl.Next;
if ((ArgOp->Asl.ParseOpcode == PARSEOP_ZERO) ||
((ArgOp->Asl.ParseOpcode == PARSEOP_INTEGER) &&
(ArgOp->Asl.Value.Integer == 0)))
{
AslError (ASL_ERROR, ASL_MSG_NON_ZERO, ArgOp, NULL);
}
break;
case PARSEOP_CONNECTION:
/*
* Ensure that the referenced operation region has the correct SPACE_ID.
* From the grammar/parser, we know the parent is a FIELD definition.
*/
ArgOp = Op->Asl.Parent; /* Field definition */
ArgOp = ArgOp->Asl.Child; /* First child is the OpRegion Name */
Node = ArgOp->Asl.Node; /* OpRegion namespace node */
if (!Node)
{
break;
}
ArgOp = Node->Op; /* OpRegion definition */
ArgOp = ArgOp->Asl.Child; /* First child is the OpRegion Name */
ArgOp = ArgOp->Asl.Next; /* Next peer is the SPACE_ID (what we want) */
/*
* The Connection() operator is only valid for the following operation
* region SpaceIds: GeneralPurposeIo and GenericSerialBus.
*/
if ((ArgOp->Asl.Value.Integer != ACPI_ADR_SPACE_GPIO) &&
(ArgOp->Asl.Value.Integer != ACPI_ADR_SPACE_GSBUS))
{
AslError (ASL_ERROR, ASL_MSG_CONNECTION_INVALID, Op, NULL);
}
break;
case PARSEOP_FIELD:
/*
* Ensure that fields for GeneralPurposeIo and GenericSerialBus
* contain at least one Connection() operator
*/
ArgOp = Op->Asl.Child; /* 1st child is the OpRegion Name */
Node = ArgOp->Asl.Node; /* OpRegion namespace node */
if (!Node)
{
break;
}
ArgOp = Node->Op; /* OpRegion definition */
ArgOp = ArgOp->Asl.Child; /* First child is the OpRegion Name */
ArgOp = ArgOp->Asl.Next; /* Next peer is the SPACE_ID (what we want) */
/* We are only interested in GeneralPurposeIo and GenericSerialBus */
if ((ArgOp->Asl.Value.Integer != ACPI_ADR_SPACE_GPIO) &&
(ArgOp->Asl.Value.Integer != ACPI_ADR_SPACE_GSBUS))
{
break;
}
ArgOp = Op->Asl.Child; /* 1st child is the OpRegion Name */
ArgOp = ArgOp->Asl.Next; /* AccessType */
ArgOp = ArgOp->Asl.Next; /* LockRule */
ArgOp = ArgOp->Asl.Next; /* UpdateRule */
ArgOp = ArgOp->Asl.Next; /* Start of FieldUnitList */
/* Walk the FieldUnitList */
while (ArgOp)
{
if (ArgOp->Asl.ParseOpcode == PARSEOP_CONNECTION)
{
break;
}
else if (ArgOp->Asl.ParseOpcode == PARSEOP_NAMESEG)
{
AslError (ASL_ERROR, ASL_MSG_CONNECTION_MISSING, ArgOp, NULL);
break;
}
ArgOp = ArgOp->Asl.Next;
}
break;
default:
break;
}
return (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: AnAnalyzeStoreOperator
*
* PARAMETERS: Op - Store() operator
*
* RETURN: None
*
* DESCRIPTION: Analyze a store operator. Mostly for stores to/from package
* objects where there are more restrictions than other data
* types.
*
******************************************************************************/
static void
AnAnalyzeStoreOperator (
ACPI_PARSE_OBJECT *Op)
{
ACPI_NAMESPACE_NODE *SourceNode;
ACPI_NAMESPACE_NODE *TargetNode;
ACPI_PARSE_OBJECT *SourceOperandOp;
ACPI_PARSE_OBJECT *TargetOperandOp;
UINT32 SourceOperandBtype;
UINT32 TargetOperandBtype;
/* Extract the two operands for STORE */
SourceOperandOp = Op->Asl.Child;
TargetOperandOp = SourceOperandOp->Asl.Next;
/*
* Ignore these Source operand opcodes, they cannot be typechecked,
* the actual result is unknown here.
*/
switch (SourceOperandOp->Asl.ParseOpcode)
{
/* For these, type of the returned value is unknown at compile time */
case PARSEOP_DEREFOF:
case PARSEOP_METHODCALL:
case PARSEOP_STORE:
case PARSEOP_COPYOBJECT:
return;
case PARSEOP_INDEX:
case PARSEOP_REFOF:
if (!Gbl_EnableReferenceTypechecking)
{
return;
}
/*
* These opcodes always return an object reference, and thus
* the result can only be stored to a Local, Arg, or Debug.
*/
if (TargetOperandOp->Asl.AmlOpcode == AML_DEBUG_OP)
{
return;
}
if ((TargetOperandOp->Asl.AmlOpcode < AML_LOCAL0) ||
(TargetOperandOp->Asl.AmlOpcode > AML_ARG6))
{
AslError (ASL_ERROR, ASL_MSG_INVALID_TYPE, TargetOperandOp,
"Source [Reference], Target must be [Local/Arg/Debug]");
}
return;
default:
break;
}
/*
* Ignore these Target operand opcodes, they cannot be typechecked
*/
switch (TargetOperandOp->Asl.ParseOpcode)
{
case PARSEOP_DEBUG:
case PARSEOP_DEREFOF:
case PARSEOP_REFOF:
case PARSEOP_INDEX:
case PARSEOP_STORE:
return;
default:
break;
}
/*
* Ignore typecheck for External() operands of type "UnknownObj",
* we don't know the actual type (source or target).
*/
SourceNode = SourceOperandOp->Asl.Node;
if (SourceNode &&
(SourceNode->Flags & ANOBJ_IS_EXTERNAL) &&
(SourceNode->Type == ACPI_TYPE_ANY))
{
return;
}
TargetNode = TargetOperandOp->Asl.Node;
if (TargetNode &&
(TargetNode->Flags & ANOBJ_IS_EXTERNAL) &&
(TargetNode->Type == ACPI_TYPE_ANY))
{
return;
}
/*
* A NULL node with a namepath AML opcode indicates non-existent
* name. Just return, the error message is generated elsewhere.
*/
if ((!SourceNode && (SourceOperandOp->Asl.AmlOpcode == AML_INT_NAMEPATH_OP)) ||
(!TargetNode && (TargetOperandOp->Asl.AmlOpcode == AML_INT_NAMEPATH_OP)))
{
return;
}
/*
* Simple check for source same as target via NS node.
* -- Could be expanded to locals and args.
*/
if (SourceNode && TargetNode)
{
if (SourceNode == TargetNode)
{
AslError (ASL_WARNING, ASL_MSG_DUPLICATE_ITEM,
TargetOperandOp, "Source is the same as Target");
return;
}
}
/* Ignore typecheck if either source or target is a local or arg */
if ((SourceOperandOp->Asl.AmlOpcode >= AML_LOCAL0) &&
(SourceOperandOp->Asl.AmlOpcode <= AML_ARG6))
{
return; /* Cannot type a local/arg at compile time */
}
if ((TargetOperandOp->Asl.AmlOpcode >= AML_LOCAL0) &&
(TargetOperandOp->Asl.AmlOpcode <= AML_ARG6))
{
return; /* Cannot type a local/arg at compile time */
}
/*
* Package objects are a special case because they cannot by implicitly
* converted to/from anything. Check for these two illegal cases:
*
* Store (non-package, package)
* Store (package, non-package)
*/
SourceOperandBtype = AnGetBtype (SourceOperandOp);
TargetOperandBtype = AnGetBtype (TargetOperandOp);
/* Check source first for (package, non-package) case */
if (SourceOperandBtype & ACPI_BTYPE_PACKAGE)
{
/* If Source is PACKAGE-->Target must be PACKAGE */
if (!(TargetOperandBtype & ACPI_BTYPE_PACKAGE))
{
AslError (ASL_ERROR, ASL_MSG_INVALID_TYPE, TargetOperandOp,
"Source is [Package], Target must be a package also");
}
}
/* Else check target for (non-package, package) case */
else if (TargetOperandBtype & ACPI_BTYPE_PACKAGE)
{
/* If Target is PACKAGE, Source must be PACKAGE */
if (!(SourceOperandBtype & ACPI_BTYPE_PACKAGE))
{
AslError (ASL_ERROR, ASL_MSG_INVALID_TYPE, SourceOperandOp,
"Target is [Package], Source must be a package also");
}
}
}