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Diffstat (limited to 'source/compiler/aslwalks.c')
| -rw-r--r-- | source/compiler/aslwalks.c | 1237 |
1 files changed, 1237 insertions, 0 deletions
diff --git a/source/compiler/aslwalks.c b/source/compiler/aslwalks.c new file mode 100644 index 0000000..d98806c --- /dev/null +++ b/source/compiler/aslwalks.c @@ -0,0 +1,1237 @@ +/****************************************************************************** + * + * Module Name: aslwalks.c - major analytical parse tree walks + * + *****************************************************************************/ + +/* + * Copyright (C) 2000 - 2012, 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") + + +/******************************************************************************* + * + * 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); + } + + /* + * A child indicates a possible return value. A simple Return or + * Return() is marked with NODE_IS_NULL_RETURN by the parser so + * that it is not counted as a "real" return-with-value, although + * the AML code that is actually emitted is Return(0). The AML + * definition of Return has a required parameter, so we are + * forced to convert a null return to Return(0). + */ + if ((Op->Asl.Child) && + (Op->Asl.Child->Asl.ParseOpcode != PARSEOP_DEFAULT_ARG) && + (!(Op->Asl.Child->Asl.CompileFlags & NODE_IS_NULL_RETURN))) + { + 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; + AnCheckId (Next, ASL_TYPE_HID); + } + + /* Special typechecking for _CID */ + + else if (!ACPI_STRCMP (METHOD_NAME__CID, Op->Asl.NameSeg)) + { + Next = Op->Asl.Child->Asl.Next; + + if ((Next->Asl.ParseOpcode == PARSEOP_PACKAGE) || + (Next->Asl.ParseOpcode == PARSEOP_VAR_PACKAGE)) + { + Next = Next->Asl.Child; + while (Next) + { + AnCheckId (Next, ASL_TYPE_CID); + Next = Next->Asl.Next; + } + } + else + { + AnCheckId (Next, ASL_TYPE_CID); + } + } + break; + + + default: + break; + } + + return (AE_OK); +} + + +/******************************************************************************* + * + * 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. Also, some special checks + * For GPE and _REG methods. + */ + if (ApCheckForPredefinedMethod (Op, MethodInfo)) + { + /* Special check for two names like _L01 and _E01 in same scope */ + + ApCheckForGpeNameConflict (Op); + + /* + * Special check for _REG: Must have an operation region definition + * within the same scope! + */ + ApCheckRegMethod (Op); + } + + ACPI_FREE (MethodInfo); + break; + + + case PARSEOP_NAME: + + /* Special check for two names like _L01 and _E01 in same scope */ + + ApCheckForGpeNameConflict (Op); + 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: 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_UPWARD, NULL, + 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: 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: 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; + 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 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) && + (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; + + 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. + */ + ArgNode = Op->Asl.Parent; /* Field definition */ + ArgNode = ArgNode->Asl.Child; /* First child is the OpRegion Name */ + Node = ArgNode->Asl.Node; /* OpRegion namespace node */ + + ArgNode = Node->Op; /* OpRegion definition */ + ArgNode = ArgNode->Asl.Child; /* First child is the OpRegion Name */ + ArgNode = ArgNode->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 ((ArgNode->Asl.Value.Integer != ACPI_ADR_SPACE_GPIO) && + (ArgNode->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 + */ + ArgNode = Op->Asl.Child; /* 1st child is the OpRegion Name */ + Node = ArgNode->Asl.Node; /* OpRegion namespace node */ + if (!Node) + { + break; + } + + ArgNode = Node->Op; /* OpRegion definition */ + ArgNode = ArgNode->Asl.Child; /* First child is the OpRegion Name */ + ArgNode = ArgNode->Asl.Next; /* Next peer is the SPACE_ID (what we want) */ + + /* We are only interested in GeneralPurposeIo and GenericSerialBus */ + + if ((ArgNode->Asl.Value.Integer != ACPI_ADR_SPACE_GPIO) && + (ArgNode->Asl.Value.Integer != ACPI_ADR_SPACE_GSBUS)) + { + break; + } + + ArgNode = Op->Asl.Child; /* 1st child is the OpRegion Name */ + ArgNode = ArgNode->Asl.Next; /* AccessType */ + ArgNode = ArgNode->Asl.Next; /* LockRule */ + ArgNode = ArgNode->Asl.Next; /* UpdateRule */ + ArgNode = ArgNode->Asl.Next; /* Start of FieldUnitList */ + + /* Walk the FieldUnitList */ + + while (ArgNode) + { + if (ArgNode->Asl.ParseOpcode == PARSEOP_CONNECTION) + { + break; + } + else if (ArgNode->Asl.ParseOpcode == PARSEOP_NAMESEG) + { + AslError (ASL_ERROR, ASL_MSG_CONNECTION_MISSING, ArgNode, NULL); + break; + } + + ArgNode = ArgNode->Asl.Next; + } + break; + + default: + break; + } + + return (AE_OK); +} |
