/******************************************************************************
*
* Module Name: aslwalks.c - Miscellaneous analytical parse tree walks
*
*****************************************************************************/
/******************************************************************************
*
* 1. Copyright Notice
*
* Some or all of this work - Copyright (c) 1999 - 2022, 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.
*
*****************************************************************************
*
* Alternatively, you may choose to be licensed under the terms of the
* following license:
*
* 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.
*
* 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 MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* 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 DAMAGE.
*
* Alternatively, you may choose to be licensed under the terms of the
* GNU General Public License ("GPL") version 2 as published by the Free
* Software Foundation.
*
*****************************************************************************/
#include <contrib/dev/acpica/compiler/aslcompiler.h>
#include "aslcompiler.y.h"
#include <contrib/dev/acpica/include/acparser.h>
#include <contrib/dev/acpica/include/amlcode.h>
#define _COMPONENT ACPI_COMPILER
ACPI_MODULE_NAME ("aslwalks")
/* Local prototypes */
static void
AnAnalyzeStoreOperator (
ACPI_PARSE_OBJECT *Op);
static BOOLEAN
AnIsValidBufferConstant (
ACPI_PARSE_OBJECT *Op);
static void
AnValidateCreateBufferField (
ACPI_PARSE_OBJECT *CreateBufferFieldOp);
/*******************************************************************************
*
* 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;
}
ACPI_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 */
AnFormatBtype (AslGbl_StringBuffer, ThisNodeBtype);
AnFormatBtype (AslGbl_StringBuffer2, RequiredBtypes);
sprintf (AslGbl_MsgBuffer, "[%s] found, %s operator requires [%s]",
AslGbl_StringBuffer, OpInfo->Name, AslGbl_StringBuffer2);
AslError (ASL_ERROR, ASL_MSG_INVALID_TYPE,
ArgOp, AslGbl_MsgBuffer);
}
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);
if (OpInfo->Flags & AML_CREATE)
{
/* This group contains all of the Create Buffer Field operators */
AnValidateCreateBufferField (Op);
return (AE_OK);
}
/*
* 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 (AslGbl_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_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: AnValidateCreateBufferField
*
* PARAMETERS: Op - A create buffer field operator
*
* RETURN: None
*
* DESCRIPTION: Check if a buffer index argument to a create buffer field
* operation is beyond the end of the target buffer.
*
* Validates these AML operators:
*
* AML_CREATE_FIELD_OP
* AML_CREATE_BIT_FIELD_OP
* AML_CREATE_BYTE_FIELD_OP
* AML_CREATE_WORD_FIELD_OP
* AML_CREATE_DWORD_FIELD_OP
* AML_CREATE_QWORD_FIELD_OP
*
* There are two conditions that must be satisfied in order to enable
* validation at compile time:
*
* 1) The length of the target buffer must be an integer constant
* 2) The index specified in the create* must be an integer constant
* 3) For CreateField, the bit length argument must be non-zero.
*
******************************************************************************/
static void
AnValidateCreateBufferField (
ACPI_PARSE_OBJECT *CreateBufferFieldOp)
{
ACPI_PARSE_OBJECT *TargetBufferOp;
ACPI_PARSE_OBJECT *ArgOp;
UINT32 TargetBufferLength;
UINT32 LastFieldByteIndex;
/*
* 1) Get the length of the target buffer
*/
ArgOp = CreateBufferFieldOp->Asl.Child; /* Reference to target buffer */
/*
* If no attached Node, the target buffer may be something like an
* ArgX or LocalX and cannot be evaluated at compile time.
*/
if (!ArgOp->Asl.Node)
{
return;
}
TargetBufferOp = ArgOp->Asl.Node->Op;
TargetBufferOp = TargetBufferOp->Asl.Child; /* Target buffer */
TargetBufferOp = TargetBufferOp->Asl.Next; /* "Buffer" keyword */
if (!TargetBufferOp)
{
/* Not a statement of the form NAME(XXXX, Buffer.... */
return;
}
/* Get the buffer length argument. It must be an integer constant */
ArgOp = TargetBufferOp->Asl.Child;
if (!AnIsValidBufferConstant (ArgOp))
{
return;
}
TargetBufferLength = (UINT32) ArgOp->Asl.Value.Integer;
/*
* 2) Get the value of the buffer index argument. It must be
* an integer constant.
*/
ArgOp = CreateBufferFieldOp->Asl.Child; /* Reference to target buffer */
ArgOp = ArgOp->Asl.Next; /* Buffer Index argument*/
if (!AnIsValidBufferConstant (ArgOp))
{
return;
}
LastFieldByteIndex =
(UINT32) ArgOp->Asl.Value.Integer; /* Index can be in either bytes or bits */
/*
* 3) Get the length of the new buffer field, in bytes. Also,
* create the final target buffer index for the last byte of the field
*/
switch (CreateBufferFieldOp->Asl.ParseOpcode)
{
case PARSEOP_CREATEBITFIELD: /* A one bit field */
LastFieldByteIndex = ACPI_ROUND_BITS_DOWN_TO_BYTES (LastFieldByteIndex);
break;
case PARSEOP_CREATEBYTEFIELD:
break;
case PARSEOP_CREATEWORDFIELD:
LastFieldByteIndex += (sizeof (UINT16) - 1);
break;
case PARSEOP_CREATEDWORDFIELD:
LastFieldByteIndex += (sizeof (UINT32) - 1);
break;
case PARSEOP_CREATEQWORDFIELD:
LastFieldByteIndex += (sizeof (UINT64) - 1);
break;
case PARSEOP_CREATEFIELD: /* Multi-bit field */
ArgOp = ArgOp->Asl.Next; /* Length argument, in bits */
if (!AnIsValidBufferConstant (ArgOp))
{
return;
}
/* The buffer field length is not allowed to be zero */
if (ArgOp->Asl.Value.Integer == 0)
{
AslError (ASL_WARNING, ASL_MSG_BUFFER_FIELD_LENGTH, ArgOp, NULL);
return;
}
LastFieldByteIndex +=
((UINT32) ArgOp->Asl.Value.Integer - 1); /* Create final bit index */
/* Convert bit index to a byte index */
LastFieldByteIndex = ACPI_ROUND_BITS_DOWN_TO_BYTES (LastFieldByteIndex);
break;
default:
return;
}
/*
* 4) Check for an access (index) beyond the end of the target buffer,
* or a zero length target buffer.
*/
if (!TargetBufferLength || (LastFieldByteIndex >= TargetBufferLength))
{
AslError (ASL_WARNING, ASL_MSG_BUFFER_FIELD_OVERFLOW, ArgOp, NULL);
}
}
/*******************************************************************************
*
* FUNCTION: AnIsValidBufferConstant
*
* PARAMETERS: Op - A buffer-related operand
*
* RETURN: TRUE if operand is valid constant, FALSE otherwise
*
* DESCRIPTION: Check if the input Op is valid constant that can be used
* in compile-time analysis.
*
******************************************************************************/
static BOOLEAN
AnIsValidBufferConstant (
ACPI_PARSE_OBJECT *Op)
{
if (!Op)
{
return (FALSE);
}
if ((Op->Asl.ParseOpcode == PARSEOP_INTEGER) ||
(Op->Asl.ParseOpcode == PARSEOP_ZERO) ||
(Op->Asl.ParseOpcode == PARSEOP_ONE))
{
return (TRUE);
}
return (FALSE);
}
/*******************************************************************************
*
* 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 (!AslGbl_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");
}
}
}