diff options
Diffstat (limited to 'usr/src/cmd/acpi/iasl/aslxref.c')
| -rw-r--r-- | usr/src/cmd/acpi/iasl/aslxref.c | 1272 |
1 files changed, 1272 insertions, 0 deletions
diff --git a/usr/src/cmd/acpi/iasl/aslxref.c b/usr/src/cmd/acpi/iasl/aslxref.c new file mode 100644 index 0000000000..a2cb6b3324 --- /dev/null +++ b/usr/src/cmd/acpi/iasl/aslxref.c @@ -0,0 +1,1272 @@ +/****************************************************************************** + * + * Module Name: aslxref - Namespace cross-reference + * + *****************************************************************************/ + +/* + * Copyright (C) 2000 - 2016, 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" +#include "acnamesp.h" +#include "acdispat.h" + + +#define _COMPONENT ACPI_COMPILER + ACPI_MODULE_NAME ("aslxref") + +/* Local prototypes */ + +static ACPI_STATUS +XfNamespaceLocateBegin ( + ACPI_PARSE_OBJECT *Op, + UINT32 Level, + void *Context); + +static ACPI_STATUS +XfNamespaceLocateEnd ( + ACPI_PARSE_OBJECT *Op, + UINT32 Level, + void *Context); + +static ACPI_PARSE_OBJECT * +XfGetParentMethod ( + ACPI_PARSE_OBJECT *Op); + +static BOOLEAN +XfObjectExists ( + char *Name); + +static ACPI_STATUS +XfCompareOneNamespaceObject ( + ACPI_HANDLE ObjHandle, + UINT32 Level, + void *Context, + void **ReturnValue); + +static void +XfCheckFieldRange ( + ACPI_PARSE_OBJECT *Op, + UINT32 RegionBitLength, + UINT32 FieldBitOffset, + UINT32 FieldBitLength, + UINT32 AccessBitWidth); + +#ifdef __UNDER_DEVELOPMENT +static ACPI_PARSE_OBJECT * +XfGetParentMethod ( + ACPI_PARSE_OBJECT *Op); + +static void +XfCheckIllegalReference ( + ACPI_PARSE_OBJECT *Op, + ACPI_NAMESPACE_NODE *Node); + +static BOOLEAN +XfIsObjectParental ( + ACPI_PARSE_OBJECT *MethodOp1, + ACPI_PARSE_OBJECT *MethodOp2); +#endif + + +/******************************************************************************* + * + * FUNCTION: XfCrossReferenceNamespace + * + * PARAMETERS: None + * + * RETURN: Status + * + * DESCRIPTION: Perform a cross reference check of the parse tree against the + * namespace. Every named referenced within the parse tree + * should be get resolved with a namespace lookup. If not, the + * original reference in the ASL code is invalid -- i.e., refers + * to a non-existent object. + * + * NOTE: The ASL "External" operator causes the name to be inserted into the + * namespace so that references to the external name will be resolved + * correctly here. + * + ******************************************************************************/ + +ACPI_STATUS +XfCrossReferenceNamespace ( + void) +{ + ACPI_WALK_STATE *WalkState; + + + /* + * Create a new walk state for use when looking up names + * within the namespace (Passed as context to the callbacks) + */ + WalkState = AcpiDsCreateWalkState (0, NULL, NULL, NULL); + if (!WalkState) + { + return (AE_NO_MEMORY); + } + + /* Walk the entire parse tree */ + + TrWalkParseTree (Gbl_ParseTreeRoot, ASL_WALK_VISIT_TWICE, + XfNamespaceLocateBegin, XfNamespaceLocateEnd, WalkState); + + ACPI_FREE (WalkState); + return (AE_OK); +} + + +/******************************************************************************* + * + * FUNCTION: XfObjectExists + * + * PARAMETERS: Name - 4 char ACPI name + * + * RETURN: TRUE if name exists in namespace + * + * DESCRIPTION: Walk the namespace to find an object + * + ******************************************************************************/ + +static BOOLEAN +XfObjectExists ( + char *Name) +{ + ACPI_STATUS Status; + + + /* Walk entire namespace from the supplied root */ + + Status = AcpiNsWalkNamespace (ACPI_TYPE_ANY, ACPI_ROOT_OBJECT, + ACPI_UINT32_MAX, FALSE, XfCompareOneNamespaceObject, NULL, + Name, NULL); + if (Status == AE_CTRL_TRUE) + { + /* At least one instance of the name was found */ + + return (TRUE); + } + + return (FALSE); +} + + +/******************************************************************************* + * + * FUNCTION: XfCompareOneNamespaceObject + * + * PARAMETERS: ACPI_WALK_CALLBACK + * + * RETURN: Status + * + * DESCRIPTION: Compare name of one object. + * + ******************************************************************************/ + +static ACPI_STATUS +XfCompareOneNamespaceObject ( + ACPI_HANDLE ObjHandle, + UINT32 Level, + void *Context, + void **ReturnValue) +{ + ACPI_NAMESPACE_NODE *Node = (ACPI_NAMESPACE_NODE *) ObjHandle; + + + /* Simply check the name */ + + if (*((UINT32 *) (Context)) == Node->Name.Integer) + { + /* Abort walk if we found one instance */ + + return (AE_CTRL_TRUE); + } + + return (AE_OK); +} + + +/******************************************************************************* + * + * FUNCTION: XfCheckFieldRange + * + * PARAMETERS: RegionBitLength - Length of entire parent region + * FieldBitOffset - Start of the field unit (within region) + * FieldBitLength - Entire length of field unit + * AccessBitWidth - Access width of the field unit + * + * RETURN: None + * + * DESCRIPTION: Check one field unit to make sure it fits in the parent + * op region. + * + * Note: AccessBitWidth must be either 8,16,32, or 64 + * + ******************************************************************************/ + +static void +XfCheckFieldRange ( + ACPI_PARSE_OBJECT *Op, + UINT32 RegionBitLength, + UINT32 FieldBitOffset, + UINT32 FieldBitLength, + UINT32 AccessBitWidth) +{ + UINT32 FieldEndBitOffset; + + + /* + * Check each field unit against the region size. The entire + * field unit (start offset plus length) must fit within the + * region. + */ + FieldEndBitOffset = FieldBitOffset + FieldBitLength; + + if (FieldEndBitOffset > RegionBitLength) + { + /* Field definition itself is beyond the end-of-region */ + + AslError (ASL_ERROR, ASL_MSG_FIELD_UNIT_OFFSET, Op, NULL); + return; + } + + /* + * Now check that the field plus AccessWidth doesn't go beyond + * the end-of-region. Assumes AccessBitWidth is a power of 2 + */ + FieldEndBitOffset = ACPI_ROUND_UP (FieldEndBitOffset, AccessBitWidth); + + if (FieldEndBitOffset > RegionBitLength) + { + /* Field definition combined with the access is beyond EOR */ + + AslError (ASL_ERROR, ASL_MSG_FIELD_UNIT_ACCESS_WIDTH, Op, NULL); + } +} + + +/******************************************************************************* + * + * FUNCTION: XfGetParentMethod + * + * PARAMETERS: Op - Parse Op to be checked + * + * RETURN: Control method Op if found. NULL otherwise + * + * DESCRIPTION: Find the control method parent of a parse op. Returns NULL if + * the input Op is not within a control method. + * + ******************************************************************************/ + +static ACPI_PARSE_OBJECT * +XfGetParentMethod ( + ACPI_PARSE_OBJECT *Op) +{ + ACPI_PARSE_OBJECT *NextOp; + + + NextOp = Op->Asl.Parent; + while (NextOp) + { + if (NextOp->Asl.AmlOpcode == AML_METHOD_OP) + { + return (NextOp); + } + + NextOp = NextOp->Asl.Parent; + } + + return (NULL); /* No parent method found */ +} + +/******************************************************************************* + * + * FUNCTION: XfNamespaceLocateBegin + * + * PARAMETERS: ASL_WALK_CALLBACK + * + * RETURN: Status + * + * DESCRIPTION: Descending callback used during cross-reference. For named + * object references, attempt to locate the name in the + * namespace. + * + * NOTE: ASL references to named fields within resource descriptors are + * resolved to integer values here. Therefore, this step is an + * important part of the code generation. We don't know that the + * name refers to a resource descriptor until now. + * + ******************************************************************************/ + +static ACPI_STATUS +XfNamespaceLocateBegin ( + ACPI_PARSE_OBJECT *Op, + UINT32 Level, + void *Context) +{ + ACPI_WALK_STATE *WalkState = (ACPI_WALK_STATE *) Context; + ACPI_NAMESPACE_NODE *Node; + ACPI_STATUS Status; + ACPI_OBJECT_TYPE ObjectType; + char *Path; + UINT8 PassedArgs; + ACPI_PARSE_OBJECT *NextOp; + ACPI_PARSE_OBJECT *OwningOp; + ACPI_PARSE_OBJECT *SpaceIdOp; + UINT32 MinimumLength; + UINT32 Offset; + UINT32 FieldBitLength; + UINT32 TagBitLength; + UINT8 Message = 0; + const ACPI_OPCODE_INFO *OpInfo; + UINT32 Flags; + ASL_METHOD_LOCAL *MethodLocals = NULL; + ASL_METHOD_LOCAL *MethodArgs = NULL; + int RegisterNumber; + UINT32 i; + + + ACPI_FUNCTION_TRACE_PTR (XfNamespaceLocateBegin, Op); + + + if ((Op->Asl.AmlOpcode == AML_METHOD_OP) && Op->Asl.Node) + { + Node = Op->Asl.Node; + + /* Support for method LocalX/ArgX analysis */ + + if (!Node->MethodLocals) + { + /* Create local/arg info blocks */ + + MethodLocals = UtLocalCalloc ( + sizeof (ASL_METHOD_LOCAL) * ACPI_METHOD_NUM_LOCALS); + Node->MethodLocals = MethodLocals; + + MethodArgs = UtLocalCalloc ( + sizeof (ASL_METHOD_LOCAL) * ACPI_METHOD_NUM_ARGS); + Node->MethodArgs = MethodArgs; + + /* + * Get the method argument count + * First, get the name node + */ + NextOp = Op->Asl.Child; + + /* Get the NumArguments node */ + + NextOp = NextOp->Asl.Next; + Node->ArgCount = (UINT8) + (((UINT8) NextOp->Asl.Value.Integer) & 0x07); + + /* We will track all posible ArgXs */ + + for (i = 0; i < ACPI_METHOD_NUM_ARGS; i++) + { + if (i < Node->ArgCount) + { + /* Real Args are always "initialized" */ + + MethodArgs[i].Flags = ASL_ARG_INITIALIZED; + } + else + { + /* Other ArgXs can be used as locals */ + + MethodArgs[i].Flags = ASL_ARG_IS_LOCAL; + } + + MethodArgs[i].Op = Op; + } + } + } + + /* + * If this node is the actual declaration of a name + * [such as the XXXX name in "Method (XXXX)"], + * we are not interested in it here. We only care about names that are + * references to other objects within the namespace and the parent objects + * of name declarations + */ + if (Op->Asl.CompileFlags & NODE_IS_NAME_DECLARATION) + { + return_ACPI_STATUS (AE_OK); + } + + OpInfo = AcpiPsGetOpcodeInfo (Op->Asl.AmlOpcode); + + /* Check method LocalX variables */ + + if (OpInfo->Type == AML_TYPE_LOCAL_VARIABLE) + { + /* Find parent method Op */ + + NextOp = XfGetParentMethod (Op); + if (!NextOp) + { + return_ACPI_STATUS (AE_OK); + } + + /* Get method node */ + + Node = NextOp->Asl.Node; + + RegisterNumber = Op->Asl.AmlOpcode & 0x0007; /* 0x60 through 0x67 */ + MethodLocals = Node->MethodLocals; + + if (Op->Asl.CompileFlags & NODE_IS_TARGET) + { + /* Local is being initialized */ + + MethodLocals[RegisterNumber].Flags |= ASL_LOCAL_INITIALIZED; + MethodLocals[RegisterNumber].Op = Op; + + return_ACPI_STATUS (AE_OK); + } + + /* Mark this Local as referenced */ + + MethodLocals[RegisterNumber].Flags |= ASL_LOCAL_REFERENCED; + MethodLocals[RegisterNumber].Op = Op; + + return_ACPI_STATUS (AE_OK); + } + + /* Check method ArgX variables */ + + if (OpInfo->Type == AML_TYPE_METHOD_ARGUMENT) + { + /* Find parent method Op */ + + NextOp = XfGetParentMethod (Op); + if (!NextOp) + { + return_ACPI_STATUS (AE_OK); + } + + /* Get method node */ + + Node = NextOp->Asl.Node; + + /* Get Arg # */ + + RegisterNumber = Op->Asl.AmlOpcode - AML_ARG0; /* 0x68 through 0x6F */ + MethodArgs = Node->MethodArgs; + + if (Op->Asl.CompileFlags & NODE_IS_TARGET) + { + /* Arg is being initialized */ + + MethodArgs[RegisterNumber].Flags |= ASL_ARG_INITIALIZED; + MethodArgs[RegisterNumber].Op = Op; + + return_ACPI_STATUS (AE_OK); + } + + /* Mark this Arg as referenced */ + + MethodArgs[RegisterNumber].Flags |= ASL_ARG_REFERENCED; + MethodArgs[RegisterNumber].Op = Op; + + return_ACPI_STATUS (AE_OK); + } + + /* + * After method ArgX and LocalX, we are only interested in opcodes + * that have an associated name + */ + if ((!(OpInfo->Flags & AML_NAMED)) && + (!(OpInfo->Flags & AML_CREATE)) && + (Op->Asl.ParseOpcode != PARSEOP_NAMESTRING) && + (Op->Asl.ParseOpcode != PARSEOP_NAMESEG) && + (Op->Asl.ParseOpcode != PARSEOP_METHODCALL)) + { + return_ACPI_STATUS (AE_OK); + } + + /* + * One special case: CondRefOf operator - we don't care if the name exists + * or not at this point, just ignore it, the point of the operator is to + * determine if the name exists at runtime. + */ + if ((Op->Asl.Parent) && + (Op->Asl.Parent->Asl.ParseOpcode == PARSEOP_CONDREFOF)) + { + return_ACPI_STATUS (AE_OK); + } + + /* + * We must enable the "search-to-root" for single NameSegs, but + * we have to be very careful about opening up scopes + */ + Flags = ACPI_NS_SEARCH_PARENT; + if ((Op->Asl.ParseOpcode == PARSEOP_NAMESTRING) || + (Op->Asl.ParseOpcode == PARSEOP_NAMESEG) || + (Op->Asl.ParseOpcode == PARSEOP_METHODCALL)) + { + /* + * These are name references, do not push the scope stack + * for them. + */ + Flags |= ACPI_NS_DONT_OPEN_SCOPE; + } + + /* Get the NamePath from the appropriate place */ + + if (OpInfo->Flags & AML_NAMED) + { + /* For nearly all NAMED operators, the name reference is the first child */ + + Path = Op->Asl.Child->Asl.Value.String; + if (Op->Asl.AmlOpcode == AML_ALIAS_OP) + { + /* + * ALIAS is the only oddball opcode, the name declaration + * (alias name) is the second operand + */ + Path = Op->Asl.Child->Asl.Next->Asl.Value.String; + } + } + else if (OpInfo->Flags & AML_CREATE) + { + /* Name must appear as the last parameter */ + + NextOp = Op->Asl.Child; + while (!(NextOp->Asl.CompileFlags & NODE_IS_NAME_DECLARATION)) + { + NextOp = NextOp->Asl.Next; + } + + Path = NextOp->Asl.Value.String; + } + else + { + Path = Op->Asl.Value.String; + } + + ObjectType = AslMapNamedOpcodeToDataType (Op->Asl.AmlOpcode); + ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, + "Type=%s\n", AcpiUtGetTypeName (ObjectType))); + + /* + * Lookup the name in the namespace. Name must exist at this point, or it + * is an invalid reference. + * + * The namespace is also used as a lookup table for references to resource + * descriptors and the fields within them. + */ + Gbl_NsLookupCount++; + + Status = AcpiNsLookup (WalkState->ScopeInfo, Path, ObjectType, + ACPI_IMODE_EXECUTE, Flags, WalkState, &(Node)); + if (ACPI_FAILURE (Status)) + { + if (Status == AE_NOT_FOUND) + { + /* + * We didn't find the name reference by path -- we can qualify this + * a little better before we print an error message + */ + if (strlen (Path) == ACPI_NAME_SIZE) + { + /* A simple, one-segment ACPI name */ + + if (XfObjectExists (Path)) + { + /* + * There exists such a name, but we couldn't get to it + * from this scope + */ + AslError (ASL_ERROR, ASL_MSG_NOT_REACHABLE, Op, + Op->Asl.ExternalName); + } + else + { + /* The name doesn't exist, period */ + + AslError (ASL_ERROR, ASL_MSG_NOT_EXIST, + Op, Op->Asl.ExternalName); + } + } + else + { + /* Check for a fully qualified path */ + + if (Path[0] == AML_ROOT_PREFIX) + { + /* Gave full path, the object does not exist */ + + AslError (ASL_ERROR, ASL_MSG_NOT_EXIST, Op, + Op->Asl.ExternalName); + } + else + { + /* + * We can't tell whether it doesn't exist or just + * can't be reached. + */ + AslError (ASL_ERROR, ASL_MSG_NOT_FOUND, Op, + Op->Asl.ExternalName); + } + } + + Status = AE_OK; + } + + return_ACPI_STATUS (Status); + } + + /* Check for a reference vs. name declaration */ + + if (!(OpInfo->Flags & AML_NAMED) && + !(OpInfo->Flags & AML_CREATE)) + { + /* This node has been referenced, mark it for reference check */ + + Node->Flags |= ANOBJ_IS_REFERENCED; + +#ifdef __UNDER_DEVELOPMENT + + /* Check for an illegal reference */ + + XfCheckIllegalReference (Op, Node); +#endif + } + + /* Attempt to optimize the NamePath */ + + OptOptimizeNamePath (Op, OpInfo->Flags, WalkState, Path, Node); + + /* + * 1) Dereference an alias (A name reference that is an alias) + * Aliases are not nested, the alias always points to the final object + */ + if ((Op->Asl.ParseOpcode != PARSEOP_ALIAS) && + (Node->Type == ACPI_TYPE_LOCAL_ALIAS)) + { + /* This node points back to the original PARSEOP_ALIAS */ + + NextOp = Node->Op; + + /* The first child is the alias target op */ + + NextOp = NextOp->Asl.Child; + + /* That in turn points back to original target alias node */ + + if (NextOp->Asl.Node) + { + Node = NextOp->Asl.Node; + } + + /* Else - forward reference to alias, will be resolved later */ + } + + /* 2) Check for a reference to a resource descriptor */ + + if ((Node->Type == ACPI_TYPE_LOCAL_RESOURCE_FIELD) || + (Node->Type == ACPI_TYPE_LOCAL_RESOURCE)) + { + /* + * This was a reference to a field within a resource descriptor. + * Extract the associated field offset (either a bit or byte + * offset depending on the field type) and change the named + * reference into an integer for AML code generation + */ + Offset = Node->Value; + TagBitLength = Node->Length; + + /* + * If a field is being created, generate the length (in bits) of + * the field. Note: Opcodes other than CreateXxxField and Index + * can come through here. For other opcodes, we just need to + * convert the resource tag reference to an integer offset. + */ + switch (Op->Asl.Parent->Asl.AmlOpcode) + { + case AML_CREATE_FIELD_OP: /* Variable "Length" field, in bits */ + /* + * We know the length operand is an integer constant because + * we know that it contains a reference to a resource + * descriptor tag. + */ + FieldBitLength = (UINT32) Op->Asl.Next->Asl.Value.Integer; + break; + + case AML_CREATE_BIT_FIELD_OP: + + FieldBitLength = 1; + break; + + case AML_CREATE_BYTE_FIELD_OP: + case AML_INDEX_OP: + + FieldBitLength = 8; + break; + + case AML_CREATE_WORD_FIELD_OP: + + FieldBitLength = 16; + break; + + case AML_CREATE_DWORD_FIELD_OP: + + FieldBitLength = 32; + break; + + case AML_CREATE_QWORD_FIELD_OP: + + FieldBitLength = 64; + break; + + default: + + FieldBitLength = 0; + break; + } + + /* Check the field length against the length of the resource tag */ + + if (FieldBitLength) + { + if (TagBitLength < FieldBitLength) + { + Message = ASL_MSG_TAG_SMALLER; + } + else if (TagBitLength > FieldBitLength) + { + Message = ASL_MSG_TAG_LARGER; + } + + if (Message) + { + sprintf (MsgBuffer, + "Size mismatch, Tag: %u bit%s, Field: %u bit%s", + TagBitLength, (TagBitLength > 1) ? "s" : "", + FieldBitLength, (FieldBitLength > 1) ? "s" : ""); + + AslError (ASL_WARNING, Message, Op, MsgBuffer); + } + } + + /* Convert the BitOffset to a ByteOffset for certain opcodes */ + + switch (Op->Asl.Parent->Asl.AmlOpcode) + { + case AML_CREATE_BYTE_FIELD_OP: + case AML_CREATE_WORD_FIELD_OP: + case AML_CREATE_DWORD_FIELD_OP: + case AML_CREATE_QWORD_FIELD_OP: + case AML_INDEX_OP: + + Offset = ACPI_DIV_8 (Offset); + break; + + default: + + break; + } + + /* Now convert this node to an integer whose value is the field offset */ + + Op->Asl.AmlLength = 0; + Op->Asl.ParseOpcode = PARSEOP_INTEGER; + Op->Asl.Value.Integer = (UINT64) Offset; + Op->Asl.CompileFlags |= NODE_IS_RESOURCE_FIELD; + + OpcGenerateAmlOpcode (Op); + } + + /* 3) Check for a method invocation */ + + else if ((((Op->Asl.ParseOpcode == PARSEOP_NAMESTRING) || (Op->Asl.ParseOpcode == PARSEOP_NAMESEG)) && + (Node->Type == ACPI_TYPE_METHOD) && + (Op->Asl.Parent) && + (Op->Asl.Parent->Asl.ParseOpcode != PARSEOP_METHOD)) || + + (Op->Asl.ParseOpcode == PARSEOP_METHODCALL)) + { + /* + * A reference to a method within one of these opcodes is not an + * invocation of the method, it is simply a reference to the method. + */ + if ((Op->Asl.Parent) && + ((Op->Asl.Parent->Asl.ParseOpcode == PARSEOP_REFOF) || + (Op->Asl.Parent->Asl.ParseOpcode == PARSEOP_DEREFOF) || + (Op->Asl.Parent->Asl.ParseOpcode == PARSEOP_PACKAGE) || + (Op->Asl.Parent->Asl.ParseOpcode == PARSEOP_VAR_PACKAGE)|| + (Op->Asl.Parent->Asl.ParseOpcode == PARSEOP_OBJECTTYPE))) + { + return_ACPI_STATUS (AE_OK); + } + /* + * There are two types of method invocation: + * 1) Invocation with arguments -- the parser recognizes this + * as a METHODCALL. + * 2) Invocation with no arguments --the parser cannot determine that + * this is a method invocation, therefore we have to figure it out + * here. + */ + if (Node->Type != ACPI_TYPE_METHOD) + { + sprintf (MsgBuffer, "%s is a %s", + Op->Asl.ExternalName, AcpiUtGetTypeName (Node->Type)); + + AslError (ASL_ERROR, ASL_MSG_NOT_METHOD, Op, MsgBuffer); + return_ACPI_STATUS (AE_OK); + } + + /* Save the method node in the caller's op */ + + Op->Asl.Node = Node; + if (Op->Asl.Parent->Asl.ParseOpcode == PARSEOP_CONDREFOF) + { + return_ACPI_STATUS (AE_OK); + } + + /* + * This is a method invocation, with or without arguments. + * Count the number of arguments, each appears as a child + * under the parent node + */ + Op->Asl.ParseOpcode = PARSEOP_METHODCALL; + UtSetParseOpName (Op); + + PassedArgs = 0; + NextOp = Op->Asl.Child; + + while (NextOp) + { + PassedArgs++; + NextOp = NextOp->Asl.Next; + } + + if (Node->Value != ASL_EXTERNAL_METHOD && + Op->Asl.Parent->Asl.ParseOpcode != PARSEOP_EXTERNAL) + { + /* + * Check the parsed arguments with the number expected by the + * method declaration itself + */ + if (PassedArgs != Node->Value) + { + sprintf (MsgBuffer, "%s requires %u", Op->Asl.ExternalName, + Node->Value); + + if (PassedArgs < Node->Value) + { + AslError (ASL_ERROR, ASL_MSG_ARG_COUNT_LO, Op, MsgBuffer); + } + else + { + AslError (ASL_ERROR, ASL_MSG_ARG_COUNT_HI, Op, MsgBuffer); + } + } + } + } + + /* 4) Check for an ASL Field definition */ + + else if ((Op->Asl.Parent) && + ((Op->Asl.Parent->Asl.ParseOpcode == PARSEOP_FIELD) || + (Op->Asl.Parent->Asl.ParseOpcode == PARSEOP_BANKFIELD))) + { + /* + * Offset checking for fields. If the parent operation region has a + * constant length (known at compile time), we can check fields + * defined in that region against the region length. This will catch + * fields and field units that cannot possibly fit within the region. + * + * Note: Index fields do not directly reference an operation region, + * thus they are not included in this check. + */ + if (Op == Op->Asl.Parent->Asl.Child) + { + /* + * This is the first child of the field node, which is + * the name of the region. Get the parse node for the + * region -- which contains the length of the region. + */ + OwningOp = Node->Op; + Op->Asl.Parent->Asl.ExtraValue = + ACPI_MUL_8 ((UINT32) OwningOp->Asl.Value.Integer); + + /* Examine the field access width */ + + switch ((UINT8) Op->Asl.Parent->Asl.Value.Integer) + { + case AML_FIELD_ACCESS_ANY: + case AML_FIELD_ACCESS_BYTE: + case AML_FIELD_ACCESS_BUFFER: + default: + + MinimumLength = 1; + break; + + case AML_FIELD_ACCESS_WORD: + + MinimumLength = 2; + break; + + case AML_FIELD_ACCESS_DWORD: + + MinimumLength = 4; + break; + + case AML_FIELD_ACCESS_QWORD: + + MinimumLength = 8; + break; + } + + /* + * Is the region at least as big as the access width? + * Note: DataTableRegions have 0 length + */ + if (((UINT32) OwningOp->Asl.Value.Integer) && + ((UINT32) OwningOp->Asl.Value.Integer < MinimumLength)) + { + AslError (ASL_ERROR, ASL_MSG_FIELD_ACCESS_WIDTH, Op, NULL); + } + + /* + * Check EC/CMOS/SMBUS fields to make sure that the correct + * access type is used (BYTE for EC/CMOS, BUFFER for SMBUS) + */ + SpaceIdOp = OwningOp->Asl.Child->Asl.Next; + switch ((UINT32) SpaceIdOp->Asl.Value.Integer) + { + case ACPI_ADR_SPACE_EC: + case ACPI_ADR_SPACE_CMOS: + case ACPI_ADR_SPACE_GPIO: + + if ((UINT8) Op->Asl.Parent->Asl.Value.Integer != + AML_FIELD_ACCESS_BYTE) + { + AslError (ASL_ERROR, ASL_MSG_REGION_BYTE_ACCESS, Op, NULL); + } + break; + + case ACPI_ADR_SPACE_SMBUS: + case ACPI_ADR_SPACE_IPMI: + case ACPI_ADR_SPACE_GSBUS: + + if ((UINT8) Op->Asl.Parent->Asl.Value.Integer != + AML_FIELD_ACCESS_BUFFER) + { + AslError (ASL_ERROR, ASL_MSG_REGION_BUFFER_ACCESS, Op, NULL); + } + break; + + default: + + /* Nothing to do for other address spaces */ + + break; + } + } + else + { + /* + * This is one element of the field list. Check to make sure + * that it does not go beyond the end of the parent operation region. + * + * In the code below: + * Op->Asl.Parent->Asl.ExtraValue - Region Length (bits) + * Op->Asl.ExtraValue - Field start offset (bits) + * Op->Asl.Child->Asl.Value.Integer32 - Field length (bits) + * Op->Asl.Child->Asl.ExtraValue - Field access width (bits) + */ + if (Op->Asl.Parent->Asl.ExtraValue && Op->Asl.Child) + { + XfCheckFieldRange (Op, + Op->Asl.Parent->Asl.ExtraValue, + Op->Asl.ExtraValue, + (UINT32) Op->Asl.Child->Asl.Value.Integer, + Op->Asl.Child->Asl.ExtraValue); + } + } + } + + /* 5) Check for a connection object */ +#if 0 + else if (Op->Asl.Parent->Asl.ParseOpcode == PARSEOP_CONNECTION) + { + return_ACPI_STATUS (Status); + } +#endif + + Op->Asl.Node = Node; + return_ACPI_STATUS (Status); +} + + +/******************************************************************************* + * + * FUNCTION: XfNamespaceLocateEnd + * + * PARAMETERS: ASL_WALK_CALLBACK + * + * RETURN: Status + * + * DESCRIPTION: Ascending callback used during cross reference. We only + * need to worry about scope management here. + * + ******************************************************************************/ + +static ACPI_STATUS +XfNamespaceLocateEnd ( + ACPI_PARSE_OBJECT *Op, + UINT32 Level, + void *Context) +{ + ACPI_WALK_STATE *WalkState = (ACPI_WALK_STATE *) Context; + const ACPI_OPCODE_INFO *OpInfo; + + + ACPI_FUNCTION_TRACE (XfNamespaceLocateEnd); + + + /* We are only interested in opcodes that have an associated name */ + + OpInfo = AcpiPsGetOpcodeInfo (Op->Asl.AmlOpcode); + if (!(OpInfo->Flags & AML_NAMED)) + { + return_ACPI_STATUS (AE_OK); + } + + /* Not interested in name references, we did not open a scope for them */ + + if ((Op->Asl.ParseOpcode == PARSEOP_NAMESTRING) || + (Op->Asl.ParseOpcode == PARSEOP_NAMESEG) || + (Op->Asl.ParseOpcode == PARSEOP_METHODCALL)) + { + return_ACPI_STATUS (AE_OK); + } + + /* Pop the scope stack if necessary */ + + if (AcpiNsOpensScope (AslMapNamedOpcodeToDataType (Op->Asl.AmlOpcode))) + { + + ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, + "%s: Popping scope for Op %p\n", + AcpiUtGetTypeName (OpInfo->ObjectType), Op)); + + (void) AcpiDsScopeStackPop (WalkState); + } + + return_ACPI_STATUS (AE_OK); +} + + +#ifdef __UNDER_DEVELOPMENT +/******************************************************************************* + * + * FUNCTION: XfIsObjectParental + * + * PARAMETERS: ChildOp - Op to be checked + * PossibleParentOp - Determine if this op is in the family + * + * RETURN: TRUE if ChildOp is a descendent of PossibleParentOp + * + * DESCRIPTION: Determine if an Op is a descendent of another Op. Used to + * detect if a method is declared within another method. + * + ******************************************************************************/ + +static BOOLEAN +XfIsObjectParental ( + ACPI_PARSE_OBJECT *ChildOp, + ACPI_PARSE_OBJECT *PossibleParentOp) +{ + ACPI_PARSE_OBJECT *ParentOp; + + + /* Search upwards through the tree for possible parent */ + + ParentOp = ChildOp; + while (ParentOp) + { + if (ParentOp == PossibleParentOp) + { + return (TRUE); + } + + ParentOp = ParentOp->Asl.Parent; + } + + return (FALSE); +} + + +/******************************************************************************* + * + * FUNCTION: XfGetParentMethod + * + * PARAMETERS: Op - Op to be checked + * + * RETURN: Op for parent method. NULL if object is not within a method. + * + * DESCRIPTION: Determine if an object is within a control method. Used to + * implement special rules for named references from within a + * control method. + * + * NOTE: It would be better to have the parser set a flag in the Op if possible. + * + ******************************************************************************/ + +static ACPI_PARSE_OBJECT * +XfGetParentMethod ( + ACPI_PARSE_OBJECT *Op) +{ + ACPI_PARSE_OBJECT *ParentOp; + + + if (!Op) + { + return (NULL); + } + + if (Op->Asl.ParseOpcode == PARSEOP_METHOD) + { + return (NULL); + } + + /* Walk upwards through the parse tree, up to the root if necessary */ + + ParentOp = Op; + while (ParentOp) + { + if (ParentOp->Asl.ParseOpcode == PARSEOP_METHOD) + { + return (ParentOp); + } + + ParentOp = ParentOp->Asl.Parent; + } + + /* Object is not within a method */ + + return (NULL); +} + + +/******************************************************************************* + * + * FUNCTION: XfCheckIllegalReference + * + * PARAMETERS: Op - Op referring to the target + * TargetNode - Target of the reference + * + * RETURN: None. Emits error message for an illegal reference + * + * DESCRIPTION: Determine if a named reference is legal. A "named" reference + * is something like: Store(ABCD, ...), where ABCD is an AML + * Nameseg or Namepath. + * + * NOTE: Caller must ensure that the name Op is in fact a reference, and not + * an actual name declaration (creation of a named object). + * + ******************************************************************************/ + +static void +XfCheckIllegalReference ( + ACPI_PARSE_OBJECT *Op, + ACPI_NAMESPACE_NODE *TargetNode) +{ + ACPI_PARSE_OBJECT *MethodOp1; + ACPI_PARSE_OBJECT *MethodOp2; + ACPI_PARSE_OBJECT *TargetOp; + + + /* + * Check for an illegal reference to a named object: + * + * 1) References from one control method to another, non-parent + * method are not allowed, they will fail at runtime. + * + * 2) Forward references within a control method are not allowed. + * AML interpreters use a one-pass parse of control methods + * so these forward references will fail at runtime. + */ + TargetOp = TargetNode->Op; + + MethodOp1 = XfGetParentMethod (Op); + MethodOp2 = XfGetParentMethod (TargetOp); + + /* Are both objects within control method(s)? */ + + if (!MethodOp1 || !MethodOp2) + { + return; + } + + /* Objects not in the same method? */ + + if (MethodOp1 != MethodOp2) + { + /* + * 1) Cross-method named reference + * + * This is OK if and only if the target reference is within in a + * method that is a parent of current method + */ + if (!XfIsObjectParental (MethodOp1, MethodOp2)) + { + AslError (ASL_ERROR, ASL_MSG_ILLEGAL_METHOD_REF, Op, + Op->Asl.ExternalName); + } + } + + /* + * 2) Both reference and target are in the same method. Check if this is + * an (illegal) forward reference by examining the exact source code + * location of each (the referenced object and the object declaration). + * This is a bit nasty, yet effective. + */ + else if (Op->Asl.LogicalByteOffset < TargetOp->Asl.LogicalByteOffset) + { + AslError (ASL_ERROR, ASL_MSG_ILLEGAL_FORWARD_REF, Op, + Op->Asl.ExternalName); + } + +} +#endif |