/****************************************************************************** * * 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