FreeBSD/Linux Kernel Cross Reference
sys/contrib/dev/acpica/common/adwalk.c

     /******************************************************************************
      *
      * Module Name: adwalk - Application-level disassembler parse tree walk routines
      *
      *****************************************************************************/
     
     /******************************************************************************
      *
      * 1. Copyright Notice
     *
     * Some or all of this work - Copyright (c) 1999 - 2022, Intel Corp.
     * All rights reserved.
     *
     * 2. License
     *
     * 2.1. This is your license from Intel Corp. under its intellectual property
     * rights. You may have additional license terms from the party that provided
     * you this software, covering your right to use that party's intellectual
     * property rights.
     *
     * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
     * copy of the source code appearing in this file ("Covered Code") an
     * irrevocable, perpetual, worldwide license under Intel's copyrights in the
     * base code distributed originally by Intel ("Original Intel Code") to copy,
     * make derivatives, distribute, use and display any portion of the Covered
     * Code in any form, with the right to sublicense such rights; and
     *
     * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
     * license (with the right to sublicense), under only those claims of Intel
     * patents that are infringed by the Original Intel Code, to make, use, sell,
     * offer to sell, and import the Covered Code and derivative works thereof
     * solely to the minimum extent necessary to exercise the above copyright
     * license, and in no event shall the patent license extend to any additions
     * to or modifications of the Original Intel Code. No other license or right
     * is granted directly or by implication, estoppel or otherwise;
     *
     * The above copyright and patent license is granted only if the following
     * conditions are met:
     *
     * 3. Conditions
     *
     * 3.1. Redistribution of Source with Rights to Further Distribute Source.
     * Redistribution of source code of any substantial portion of the Covered
     * Code or modification with rights to further distribute source must include
     * the above Copyright Notice, the above License, this list of Conditions,
     * and the following Disclaimer and Export Compliance provision. In addition,
     * Licensee must cause all Covered Code to which Licensee contributes to
     * contain a file documenting the changes Licensee made to create that Covered
     * Code and the date of any change. Licensee must include in that file the
     * documentation of any changes made by any predecessor Licensee. Licensee
     * must include a prominent statement that the modification is derived,
     * directly or indirectly, from Original Intel Code.
     *
     * 3.2. Redistribution of Source with no Rights to Further Distribute Source.
     * Redistribution of source code of any substantial portion of the Covered
     * Code or modification without rights to further distribute source must
     * include the following Disclaimer and Export Compliance provision in the
     * documentation and/or other materials provided with distribution. In
     * addition, Licensee may not authorize further sublicense of source of any
     * portion of the Covered Code, and must include terms to the effect that the
     * license from Licensee to its licensee is limited to the intellectual
     * property embodied in the software Licensee provides to its licensee, and
     * not to intellectual property embodied in modifications its licensee may
     * make.
     *
     * 3.3. Redistribution of Executable. Redistribution in executable form of any
     * substantial portion of the Covered Code or modification must reproduce the
     * above Copyright Notice, and the following Disclaimer and Export Compliance
     * provision in the documentation and/or other materials provided with the
     * distribution.
     *
     * 3.4. Intel retains all right, title, and interest in and to the Original
     * Intel Code.
     *
     * 3.5. Neither the name Intel nor any other trademark owned or controlled by
     * Intel shall be used in advertising or otherwise to promote the sale, use or
     * other dealings in products derived from or relating to the Covered Code
     * without prior written authorization from Intel.
     *
     * 4. Disclaimer and Export Compliance
     *
     * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
     * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
     * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
     * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
     * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
     * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
     * PARTICULAR PURPOSE.
     *
     * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
     * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
     * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
     * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
     * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
     * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
     * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
     * LIMITED REMEDY.
     *
     * 4.3. Licensee shall not export, either directly or indirectly, any of this
    * software or system incorporating such software without first obtaining any
    * required license or other approval from the U. S. Department of Commerce or
    * any other agency or department of the United States Government. In the
    * event Licensee exports any such software from the United States or
    * re-exports any such software from a foreign destination, Licensee shall
    * ensure that the distribution and export/re-export of the software is in
    * compliance with all laws, regulations, orders, or other restrictions of the
    * U.S. Export Administration Regulations. Licensee agrees that neither it nor
    * any of its subsidiaries will export/re-export any technical data, process,
    * software, or service, directly or indirectly, to any country for which the
    * United States government or any agency thereof requires an export license,
    * other governmental approval, or letter of assurance, without first obtaining
    * such license, approval or letter.
    *
    *****************************************************************************
    *
    * Alternatively, you may choose to be licensed under the terms of the
    * following license:
    *
    * Redistribution and use in source and binary forms, with or without
    * modification, are permitted provided that the following conditions
    * are met:
    * 1. Redistributions of source code must retain the above copyright
    *    notice, this list of conditions, and the following disclaimer,
    *    without modification.
    * 2. Redistributions in binary form must reproduce at minimum a disclaimer
    *    substantially similar to the "NO WARRANTY" disclaimer below
    *    ("Disclaimer") and any redistribution must be conditioned upon
    *    including a substantially similar Disclaimer requirement for further
    *    binary redistribution.
    * 3. Neither the names of the above-listed copyright holders nor the names
    *    of any contributors may be used to endorse or promote products derived
    *    from this software without specific prior written permission.
    *
    * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
    * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
    * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
    * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
    * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
    * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
    * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
    * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
    * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
    * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
    * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
    *
    * Alternatively, you may choose to be licensed under the terms of the
    * GNU General Public License ("GPL") version 2 as published by the Free
    * Software Foundation.
    *
    *****************************************************************************/
   
   #include <contrib/dev/acpica/include/acpi.h>
   #include <contrib/dev/acpica/include/accommon.h>
   #include <contrib/dev/acpica/include/acparser.h>
   #include <contrib/dev/acpica/include/amlcode.h>
   #include <contrib/dev/acpica/include/acdisasm.h>
   #include <contrib/dev/acpica/include/acdispat.h>
   #include <contrib/dev/acpica/include/acnamesp.h>
   #include <contrib/dev/acpica/include/acapps.h>
   
   
   #define _COMPONENT          ACPI_TOOLS
           ACPI_MODULE_NAME    ("adwalk")
   
   /*
    * aslmap - opcode mappings and reserved method names
    */
   ACPI_OBJECT_TYPE
   AslMapNamedOpcodeToDataType (
       UINT16                  Opcode);
   
   /* Local prototypes */
   
   static ACPI_STATUS
   AcpiDmFindOrphanDescending (
       ACPI_PARSE_OBJECT       *Op,
       UINT32                  Level,
       void                    *Context);
   
   static ACPI_STATUS
   AcpiDmDumpDescending (
       ACPI_PARSE_OBJECT       *Op,
       UINT32                  Level,
       void                    *Context);
   
   static ACPI_STATUS
   AcpiDmXrefDescendingOp (
       ACPI_PARSE_OBJECT       *Op,
       UINT32                  Level,
       void                    *Context);
   
   static ACPI_STATUS
   AcpiDmCommonAscendingOp (
       ACPI_PARSE_OBJECT       *Op,
       UINT32                  Level,
       void                    *Context);
   
   static ACPI_STATUS
   AcpiDmLoadDescendingOp (
       ACPI_PARSE_OBJECT       *Op,
       UINT32                  Level,
       void                    *Context);
   
   static UINT32
   AcpiDmInspectPossibleArgs (
       UINT32                  CurrentOpArgCount,
       UINT32                  TargetCount,
       ACPI_PARSE_OBJECT       *Op);
   
   static ACPI_STATUS
   AcpiDmCommonDescendingOp (
       ACPI_PARSE_OBJECT       *Op,
       UINT32                  Level,
       void                    *Context);
   
   static ACPI_STATUS
   AcpiDmProcessResourceDescriptors (
       ACPI_PARSE_OBJECT       *Op,
       UINT32                  Level,
       void                    *Context);
   
   /*******************************************************************************
    *
    * FUNCTION:    AcpiDmDumpTree
    *
    * PARAMETERS:  Origin              - Starting object
    *
    * RETURN:      None
    *
    * DESCRIPTION: Parse tree walk to format and output the nodes
    *
    ******************************************************************************/
   
   void
   AcpiDmDumpTree (
       ACPI_PARSE_OBJECT       *Origin)
   {
       ACPI_OP_WALK_INFO       Info;
   
   
       if (!Origin)
       {
           return;
       }
   
       AcpiOsPrintf ("/*\nAML Parse Tree\n\n");
       Info.Flags = 0;
       Info.Count = 0;
       Info.Level = 0;
       Info.WalkState = NULL;
   
       AcpiDmWalkParseTree (Origin, AcpiDmDumpDescending, NULL, &Info);
       AcpiOsPrintf ("*/\n\n");
   }
   
   
   /*******************************************************************************
    *
    * FUNCTION:    AcpiDmFindOrphanMethods
    *
    * PARAMETERS:  Origin              - Starting object
    *
    * RETURN:      None
    *
    * DESCRIPTION: Parse tree walk to find "orphaned" method invocations -- methods
    *              that are not resolved in the namespace
    *
    ******************************************************************************/
   
   void
   AcpiDmFindOrphanMethods (
       ACPI_PARSE_OBJECT       *Origin)
   {
       ACPI_OP_WALK_INFO       Info;
   
   
       if (!Origin)
       {
           return;
       }
   
       Info.Flags = 0;
       Info.Level = 0;
       Info.WalkState = NULL;
   
       AcpiDmWalkParseTree (Origin, AcpiDmFindOrphanDescending, NULL, &Info);
   }
   
   
   /*******************************************************************************
    *
    * FUNCTION:    AcpiDmFinishNamespaceLoad
    *
    * PARAMETERS:  ParseTreeRoot       - Root of the parse tree
    *              NamespaceRoot       - Root of the internal namespace
    *              OwnerId             - OwnerId of the table to be disassembled
    *
    * RETURN:      None
    *
    * DESCRIPTION: Load all namespace items that are created within control
    *              methods. Used before namespace cross reference
    *
    ******************************************************************************/
   
   void
   AcpiDmFinishNamespaceLoad (
       ACPI_PARSE_OBJECT       *ParseTreeRoot,
       ACPI_NAMESPACE_NODE     *NamespaceRoot,
       ACPI_OWNER_ID           OwnerId)
   {
       ACPI_STATUS             Status;
       ACPI_OP_WALK_INFO       Info;
       ACPI_WALK_STATE         *WalkState;
   
   
       if (!ParseTreeRoot)
       {
           return;
       }
   
       /* Create and initialize a new walk state */
   
       WalkState = AcpiDsCreateWalkState (OwnerId, ParseTreeRoot, NULL, NULL);
       if (!WalkState)
       {
           return;
       }
   
       Status = AcpiDsScopeStackPush (NamespaceRoot, NamespaceRoot->Type,
           WalkState);
       if (ACPI_FAILURE (Status))
       {
           return;
       }
   
       Info.Flags = 0;
       Info.Level = 0;
       Info.WalkState = WalkState;
   
       AcpiDmWalkParseTree (ParseTreeRoot, AcpiDmLoadDescendingOp,
           AcpiDmCommonAscendingOp, &Info);
       ACPI_FREE (WalkState);
   }
   
   
   /*******************************************************************************
    *
    * FUNCTION:    AcpiDmCrossReferenceNamespace
    *
    * PARAMETERS:  ParseTreeRoot       - Root of the parse tree
    *              NamespaceRoot       - Root of the internal namespace
    *              OwnerId             - OwnerId of the table to be disassembled
    *
    * RETURN:      None
    *
    * DESCRIPTION: Cross reference the namespace to create externals
    *
    ******************************************************************************/
   
   void
   AcpiDmCrossReferenceNamespace (
       ACPI_PARSE_OBJECT       *ParseTreeRoot,
       ACPI_NAMESPACE_NODE     *NamespaceRoot,
       ACPI_OWNER_ID           OwnerId)
   {
       ACPI_STATUS             Status;
       ACPI_OP_WALK_INFO       Info;
       ACPI_WALK_STATE         *WalkState;
   
   
       if (!ParseTreeRoot)
       {
           return;
       }
   
       /* Create and initialize a new walk state */
   
       WalkState = AcpiDsCreateWalkState (OwnerId, ParseTreeRoot, NULL, NULL);
       if (!WalkState)
       {
           return;
       }
   
       Status = AcpiDsScopeStackPush (NamespaceRoot, NamespaceRoot->Type,
           WalkState);
       if (ACPI_FAILURE (Status))
       {
           return;
       }
   
       Info.Flags = 0;
       Info.Level = 0;
       Info.WalkState = WalkState;
   
       AcpiDmWalkParseTree (ParseTreeRoot, AcpiDmXrefDescendingOp,
           AcpiDmCommonAscendingOp, &Info);
       ACPI_FREE (WalkState);
   }
   
   
   /*******************************************************************************
    *
    * FUNCTION:    AcpiDmConvertParseObjects
    *
    * PARAMETERS:  ParseTreeRoot       - Root of the parse tree
    *              NamespaceRoot       - Root of the internal namespace
    *
    * RETURN:      None
    *
    * DESCRIPTION: Begin parse tree walk to perform conversions needed for
    *              disassembly. These include resource descriptors and switch/case
    *              operations.
    *
    ******************************************************************************/
   
   void
   AcpiDmConvertParseObjects (
       ACPI_PARSE_OBJECT       *ParseTreeRoot,
       ACPI_NAMESPACE_NODE     *NamespaceRoot)
   {
       ACPI_STATUS             Status;
       ACPI_OP_WALK_INFO       Info;
       ACPI_WALK_STATE         *WalkState;
   
   
       if (!ParseTreeRoot)
       {
           return;
       }
   
       /* Create and initialize a new walk state */
   
       WalkState = AcpiDsCreateWalkState (0, ParseTreeRoot, NULL, NULL);
       if (!WalkState)
       {
           return;
       }
   
       Status = AcpiDsScopeStackPush (NamespaceRoot, NamespaceRoot->Type,
           WalkState);
       if (ACPI_FAILURE (Status))
       {
           ACPI_FREE (WalkState);
           return;
       }
   
       Info.Flags = 0;
       Info.Level = 0;
       Info.WalkState = WalkState;
   
       AcpiDmWalkParseTree (ParseTreeRoot, AcpiDmCommonDescendingOp,
           AcpiDmCommonAscendingOp, &Info);
       ACPI_FREE (WalkState);
   
       if (AcpiGbl_TempListHead) {
           AcpiDmClearTempList();
       }
   
       return;
   }
   
   
   /*******************************************************************************
    *
    * FUNCTION:    AcpiDmDumpDescending
    *
    * PARAMETERS:  ASL_WALK_CALLBACK
    *
    * RETURN:      Status
    *
    * DESCRIPTION: Format and print contents of one parse Op.
    *
    ******************************************************************************/
   
   static ACPI_STATUS
   AcpiDmDumpDescending (
       ACPI_PARSE_OBJECT       *Op,
       UINT32                  Level,
       void                    *Context)
   {
       ACPI_OP_WALK_INFO       *Info = Context;
       char                    *Path;
       ACPI_STATUS             Status;
   
   
       if (!Op)
       {
           return (AE_OK);
       }
   
       /* Most of the information (count, level, name) here */
   
       Info->Count++;
       AcpiOsPrintf ("% 5d [%2.2d] ", Info->Count, Level);
       AcpiDmIndent (Level);
       AcpiOsPrintf ("%-28s", AcpiPsGetOpcodeName (Op->Common.AmlOpcode));
   
       /* Extra info is helpful */
   
       switch (Op->Common.AmlOpcode)
       {
       case AML_BYTE_OP:
   
           AcpiOsPrintf ("%2.2X", (UINT32) Op->Common.Value.Integer);
           break;
   
       case AML_WORD_OP:
   
           AcpiOsPrintf ("%4.4X", (UINT32) Op->Common.Value.Integer);
           break;
   
       case AML_DWORD_OP:
   
           AcpiOsPrintf ("%8.8X", (UINT32) Op->Common.Value.Integer);
           break;
   
       case AML_QWORD_OP:
   
           AcpiOsPrintf ("%8.8X%8.8X", ACPI_FORMAT_UINT64 (Op->Common.Value.Integer));
           break;
   
       case AML_INT_NAMEPATH_OP:
   
           if (Op->Common.Value.String)
           {
               Status = AcpiNsExternalizeName (ACPI_UINT32_MAX, Op->Common.Value.String,
                   NULL, &Path);
               if (ACPI_SUCCESS (Status))
               {
                   AcpiOsPrintf ("%s %p", Path, Op->Common.Node);
                   ACPI_FREE (Path);
               }
               else
               {
                   AcpiOsPrintf ("Could not externalize pathname for node [%4.4s]",
                       Op->Common.Node->Name.Ascii);
               }
           }
           else
           {
               AcpiOsPrintf ("[NULL]");
           }
           break;
   
       case AML_NAME_OP:
       case AML_METHOD_OP:
       case AML_DEVICE_OP:
   
           AcpiOsPrintf ("%4.4s",
               ACPI_CAST_PTR (char, &Op->Named.Name));
           break;
   
       case AML_INT_NAMEDFIELD_OP:
   
           AcpiOsPrintf ("%4.4s Length: (bits) %8.8X%8.8X (bytes) %8.8X%8.8X",
               ACPI_CAST_PTR (char, &Op->Named.Name),
               ACPI_FORMAT_UINT64 (Op->Common.Value.Integer),
               ACPI_FORMAT_UINT64 (Op->Common.Value.Integer / 8));
           break;
   
   
       default:
   
           break;
       }
   
       AcpiOsPrintf ("\n");
       return (AE_OK);
   }
   
   
   /*******************************************************************************
    *
    * FUNCTION:    AcpiDmFindOrphanDescending
    *
    * PARAMETERS:  ASL_WALK_CALLBACK
    *
    * RETURN:      Status
    *
    * DESCRIPTION: Check namepath Ops for orphaned method invocations
    *
    * Note: Parts of this are experimental, under possible further development.
    *
    ******************************************************************************/
   
   static ACPI_STATUS
   AcpiDmFindOrphanDescending (
       ACPI_PARSE_OBJECT       *Op,
       UINT32                  Level,
       void                    *Context)
   {
       const ACPI_OPCODE_INFO  *OpInfo;
       ACPI_PARSE_OBJECT       *ChildOp;
       ACPI_PARSE_OBJECT       *NextOp;
       ACPI_PARSE_OBJECT       *ParentOp;
       UINT32                  ArgCount;
   
   
       if (!Op)
       {
           return (AE_OK);
       }
   
   #ifdef ACPI_UNDER_DEVELOPMENT
       OpInfo = AcpiPsGetOpcodeInfo (Op->Common.AmlOpcode);
   #endif
   
       switch (Op->Common.AmlOpcode)
       {
   #ifdef ACPI_UNDER_DEVELOPMENT
       case AML_ADD_OP:
   
           ChildOp = Op->Common.Value.Arg;
           if ((ChildOp->Common.AmlOpcode == AML_INT_NAMEPATH_OP) &&
               !ChildOp->Common.Node)
           {
               AcpiNsExternalizeName (ACPI_UINT32_MAX, ChildOp->Common.Value.String,
                   NULL, &Path);
               AcpiOsPrintf ("/* %-16s A-NAMEPATH: %s  */\n",
                   Op->Common.AmlOpName, Path);
               ACPI_FREE (Path);
   
               NextOp = Op->Common.Next;
               if (!NextOp)
               {
                   /* This NamePath has no args, assume it is an integer */
   
                   AcpiDmAddOpToExternalList (ChildOp,
                       ChildOp->Common.Value.String, ACPI_TYPE_INTEGER, 0, 0);
                   return (AE_OK);
               }
   
               ArgCount = AcpiDmInspectPossibleArgs (3, 1, NextOp);
               AcpiOsPrintf ("/* A-CHILDREN: %u Actual %u */\n",
                   ArgCount, AcpiDmCountChildren (Op));
   
               if (ArgCount < 1)
               {
                   /* One Arg means this is just a Store(Name,Target) */
   
                   AcpiDmAddOpToExternalList (ChildOp,
                       ChildOp->Common.Value.String, ACPI_TYPE_INTEGER, 0, 0);
                   return (AE_OK);
               }
   
               AcpiDmAddOpToExternalList (ChildOp,
                   ChildOp->Common.Value.String, ACPI_TYPE_METHOD, ArgCount, 0);
           }
           break;
   
   #endif
   
       case AML_STORE_OP:
   
           ChildOp = Op->Common.Value.Arg;
           if ((ChildOp->Common.AmlOpcode == AML_INT_NAMEPATH_OP) &&
               !ChildOp->Common.Node)
           {
               NextOp = Op->Common.Next;
               if (!NextOp)
               {
                   /* This NamePath has no args, assume it is an integer */
   
                   AcpiDmAddOpToExternalList (ChildOp,
                       ChildOp->Common.Value.String, ACPI_TYPE_INTEGER, 0, 0);
                   return (AE_OK);
               }
   
               ArgCount = AcpiDmInspectPossibleArgs (2, 1, NextOp);
               if (ArgCount <= 1)
               {
                   /* One Arg means this is just a Store(Name,Target) */
   
                   AcpiDmAddOpToExternalList (ChildOp,
                       ChildOp->Common.Value.String, ACPI_TYPE_INTEGER, ArgCount, 0);
                   return (AE_OK);
               }
   
               AcpiDmAddOpToExternalList (ChildOp,
                   ChildOp->Common.Value.String, ACPI_TYPE_METHOD, ArgCount, 0);
           }
           break;
   
       case AML_INT_NAMEPATH_OP:
   
           /* Must examine parent to see if this namepath is an argument */
   
           ParentOp = Op->Common.Parent;
           OpInfo = AcpiPsGetOpcodeInfo (ParentOp->Common.AmlOpcode);
   
           if ((OpInfo->Class != AML_CLASS_EXECUTE) &&
               (OpInfo->Class != AML_CLASS_CREATE) &&
               (OpInfo->ObjectType != ACPI_TYPE_LOCAL_ALIAS) &&
               (ParentOp->Common.AmlOpcode != AML_INT_METHODCALL_OP) &&
               !Op->Common.Node)
           {
               ArgCount = AcpiDmInspectPossibleArgs (0, 0, Op);
   
               /*
                * Check if namepath is a predicate for if/while or lone parameter to
                * a return.
                */
               if (ArgCount == 0)
               {
                   if (((ParentOp->Common.AmlOpcode == AML_IF_OP) ||
                        (ParentOp->Common.AmlOpcode == AML_WHILE_OP) ||
                        (ParentOp->Common.AmlOpcode == AML_RETURN_OP)) &&
   
                        /* And namepath is the first argument */
                        (ParentOp->Common.Value.Arg == Op))
                   {
                       AcpiDmAddOpToExternalList (Op,
                           Op->Common.Value.String, ACPI_TYPE_INTEGER, 0, 0);
                       break;
                   }
               }
   
               /*
                * This is a standalone namestring (not a parameter to another
                * operator) - it *must* be a method invocation, nothing else is
                * grammatically possible.
                */
               AcpiDmAddOpToExternalList (Op,
                   Op->Common.Value.String, ACPI_TYPE_METHOD, ArgCount, 0);
           }
           break;
   
       default:
   
           break;
       }
   
       return (AE_OK);
   }
   
   
   /*******************************************************************************
    *
    * FUNCTION:    AcpiDmLoadDescendingOp
    *
    * PARAMETERS:  ASL_WALK_CALLBACK
    *
    * RETURN:      Status
    *
    * DESCRIPTION: Descending handler for namespace control method object load
    *
    ******************************************************************************/
   
   static ACPI_STATUS
   AcpiDmLoadDescendingOp (
       ACPI_PARSE_OBJECT       *Op,
       UINT32                  Level,
       void                    *Context)
   {
       ACPI_OP_WALK_INFO       *Info = Context;
       const ACPI_OPCODE_INFO  *OpInfo;
       ACPI_WALK_STATE         *WalkState;
       ACPI_OBJECT_TYPE        ObjectType;
       ACPI_STATUS             Status;
       char                    *Path = NULL;
       ACPI_PARSE_OBJECT       *NextOp;
       ACPI_NAMESPACE_NODE     *Node;
       char                    FieldPath[5];
       BOOLEAN                 PreDefined = FALSE;
       UINT8                   PreDefineIndex = 0;
   
   
       WalkState = Info->WalkState;
       OpInfo = AcpiPsGetOpcodeInfo (Op->Common.AmlOpcode);
       ObjectType = AslMapNamedOpcodeToDataType (Op->Asl.AmlOpcode);
   
       /* Only interested in operators that create new names */
   
       if (!(OpInfo->Flags & AML_NAMED) &&
           !(OpInfo->Flags & AML_CREATE))
       {
           goto Exit;
       }
   
       /* Get the NamePath from the appropriate place */
   
       if (OpInfo->Flags & AML_NAMED)
       {
           /* For all named operators, get the new name */
   
           Path = Op->Named.Path;
   
           if (!Path && Op->Common.AmlOpcode == AML_INT_NAMEDFIELD_OP)
           {
               *ACPI_CAST_PTR (UINT32, &FieldPath[0]) = Op->Named.Name;
               FieldPath[4] = 0;
               Path = FieldPath;
           }
       }
       else if (OpInfo->Flags & AML_CREATE)
       {
           /* New name is the last child */
   
           NextOp = Op->Common.Value.Arg;
   
           while (NextOp->Common.Next)
           {
               NextOp = NextOp->Common.Next;
           }
   
           Path = NextOp->Common.Value.String;
       }
   
       if (!Path)
       {
           goto Exit;
       }
   
       /* Insert the name into the namespace */
   
       Status = AcpiNsLookup (WalkState->ScopeInfo, Path, ObjectType,
           ACPI_IMODE_LOAD_PASS2, ACPI_NS_DONT_OPEN_SCOPE,
           WalkState, &Node);
   
       Op->Common.Node = Node;
   
       if (ACPI_SUCCESS (Status))
       {
           /* Check if it's a predefined node */
   
           while (AcpiGbl_PreDefinedNames[PreDefineIndex].Name)
           {
               if (ACPI_COMPARE_NAMESEG (Node->Name.Ascii,
                   AcpiGbl_PreDefinedNames[PreDefineIndex].Name))
               {
                   PreDefined = TRUE;
                   break;
               }
   
               PreDefineIndex++;
           }
   
           /*
            * Set node owner id if it satisfies all the following conditions:
            * 1) Not a predefined node, _SB_ etc
            * 2) Not the root node
            * 3) Not a node created by Scope
            */
           if (!PreDefined &&
               (Node != AcpiGbl_RootNode) &&
               (Op->Common.AmlOpcode != AML_SCOPE_OP))
           {
               Node->OwnerId = WalkState->OwnerId;
           }
       }
   
   
   Exit:
   
       if (AcpiNsOpensScope (ObjectType))
       {
           if (Op->Common.Node)
           {
               Status = AcpiDsScopeStackPush (Op->Common.Node, ObjectType,
                   WalkState);
               if (ACPI_FAILURE (Status))
               {
                   return (Status);
               }
           }
       }
   
       return (AE_OK);
   }
   
   
   /*******************************************************************************
    *
    * FUNCTION:    AcpiDmXrefDescendingOp
    *
    * PARAMETERS:  ASL_WALK_CALLBACK
    *
    * RETURN:      Status
    *
    * DESCRIPTION: Descending handler for namespace cross reference
    *
    ******************************************************************************/
   
   static ACPI_STATUS
   AcpiDmXrefDescendingOp (
       ACPI_PARSE_OBJECT       *Op,
       UINT32                  Level,
       void                    *Context)
   {
       ACPI_OP_WALK_INFO       *Info = Context;
       const ACPI_OPCODE_INFO  *OpInfo;
       ACPI_WALK_STATE         *WalkState;
       ACPI_OBJECT_TYPE        ObjectType;
       ACPI_OBJECT_TYPE        ObjectType2;
       ACPI_STATUS             Status;
       char                    *Path = NULL;
       ACPI_PARSE_OBJECT       *NextOp;
       ACPI_NAMESPACE_NODE     *Node;
       ACPI_OPERAND_OBJECT     *Object;
       UINT32                  ParamCount = 0;
       char                    *Pathname;
       UINT16                  Flags = 0;
   
   
       WalkState = Info->WalkState;
       OpInfo = AcpiPsGetOpcodeInfo (Op->Common.AmlOpcode);
       ObjectType = AslMapNamedOpcodeToDataType (Op->Asl.AmlOpcode);
   
       if ((!(OpInfo->Flags & AML_NAMED)) &&
           (!(OpInfo->Flags & AML_CREATE)) &&
           (Op->Common.AmlOpcode != AML_INT_NAMEPATH_OP) &&
           (Op->Common.AmlOpcode != AML_NOTIFY_OP))
       {
           goto Exit;
       }
   
       /* Get the NamePath from the appropriate place */
   
       if (OpInfo->Flags & AML_NAMED)
       {
           /*
            * Only these two operators (Alias, Scope) refer to an existing
            * name, it is the first argument
            */
           if (Op->Common.AmlOpcode == AML_ALIAS_OP)
           {
               ObjectType = ACPI_TYPE_ANY;
   
               NextOp = Op->Common.Value.Arg;
               NextOp = NextOp->Common.Value.Arg;
               if (NextOp->Common.AmlOpcode == AML_INT_NAMEPATH_OP)
               {
                   Path = NextOp->Common.Value.String;
               }
           }
           else if (Op->Common.AmlOpcode == AML_SCOPE_OP ||
                    Op->Common.AmlOpcode == AML_EXTERNAL_OP)
           {
               Path = Op->Named.Path;
           }
       }
       else if (OpInfo->Flags & AML_CREATE)
       {
           /* Referenced Buffer Name is the first child */
   
           ObjectType = ACPI_TYPE_BUFFER; /* Change from TYPE_BUFFER_FIELD */
   
           NextOp = Op->Common.Value.Arg;
           if (NextOp->Common.AmlOpcode == AML_INT_NAMEPATH_OP)
           {
               Path = NextOp->Common.Value.String;
           }
       }
       else if (Op->Common.AmlOpcode == AML_NOTIFY_OP)
       {
           Path = Op->Common.Value.Arg->Asl.Value.String;
       }
       else
       {
           Path = Op->Common.Value.String;
       }
   
       if (!Path)
       {
           goto Exit;
       }
   
       /*
        * 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.
        */
       Node = NULL;
       Status = AcpiNsLookup (WalkState->ScopeInfo, Path, ACPI_TYPE_ANY,
           ACPI_IMODE_EXECUTE, ACPI_NS_SEARCH_PARENT | ACPI_NS_DONT_OPEN_SCOPE,
           WalkState, &Node);
   
       if (ACPI_SUCCESS (Status) && (Node->Flags & ANOBJ_IS_EXTERNAL))
       {
           /* Node was created by an External() statement */
   
           Status = AE_NOT_FOUND;
       }
   
       if (ACPI_FAILURE (Status))
       {
           if (Status == AE_NOT_FOUND)
           {
               /*
                * Add this symbol as an external declaration, except if the
                * parent is a CondRefOf operator. For this operator, we do not
                * need an external, nor do we want one, since this can cause
                * disassembly problems if the symbol is actually a control
                * method.
                */
               if (!(Op->Asl.Parent &&
                   (Op->Asl.Parent->Asl.AmlOpcode == AML_CONDITIONAL_REF_OF_OP)))
              {
                  if (Node)
                  {
                      AcpiDmAddNodeToExternalList (Node,
                          (UINT8) ObjectType, 7, Flags);
                  }
                  else
                  {
                      AcpiDmAddOpToExternalList (Op, Path,
                          (UINT8) ObjectType, 7, Flags);
                  }
              }
          }
      }
  
      /*
       * Found the node, but check if it came from an external table.
       * Add it to external list. Note: Node->OwnerId == 0 indicates
       * one of the built-in ACPI Names (_OS_ etc.) which can safely
       * be ignored.
       */
      else if (Node->OwnerId &&
              (WalkState->OwnerId != Node->OwnerId))
      {
          ObjectType2 = ObjectType;
  
          Object = AcpiNsGetAttachedObject (Node);
          if (Object)
          {
              ObjectType2 = Object->Common.Type;
              if (ObjectType2 == ACPI_TYPE_METHOD)
              {
                  ParamCount = Object->Method.ParamCount;
              }
          }
  
          Pathname = AcpiNsGetExternalPathname (Node);
          if (!Pathname)
          {
              return (AE_NO_MEMORY);
          }
  
          AcpiDmAddNodeToExternalList (Node, (UINT8) ObjectType2,
              ParamCount, ACPI_EXT_RESOLVED_REFERENCE);
  
          ACPI_FREE (Pathname);
          Op->Common.Node = Node;
      }
      else
      {
          Op->Common.Node = Node;
      }
  
  
  Exit:
      /* Open new scope if necessary */
  
      if (AcpiNsOpensScope (ObjectType))
      {
          if (Op->Common.Node)
          {
              Status = AcpiDsScopeStackPush (Op->Common.Node, ObjectType,
                  WalkState);
              if (ACPI_FAILURE (Status))
              {
                  return (Status);
              }
          }
      }
  
      return (AE_OK);
  }
  
  /*******************************************************************************
   *
   * FUNCTION:    AcpiDmCommonDescendingOp
   *
   * PARAMETERS:  ASL_WALK_CALLBACK
   *
   * RETURN:      ACPI_STATUS
   *
   * DESCRIPTION: Perform parse tree preprocessing before main disassembly walk.
   *
   ******************************************************************************/
  
  static ACPI_STATUS
  AcpiDmCommonDescendingOp (
      ACPI_PARSE_OBJECT       *Op,
      UINT32                  Level,
      void                    *Context)
  {
      ACPI_STATUS             Status;
  
  
      /* Resource descriptor conversion */
  
      Status = AcpiDmProcessResourceDescriptors (Op, Level, Context);
      if (ACPI_FAILURE (Status))
      {
          return (Status);
      }
  
      /* Switch/Case conversion */
  
      Status = AcpiDmProcessSwitch (Op);
      return (Status);
  }
  
  
  /*******************************************************************************
   *
   * FUNCTION:    AcpiDmProcessResourceDescriptors
   *
   * PARAMETERS:  ASL_WALK_CALLBACK
   *
   * RETURN:      ACPI_STATUS
   *
   * DESCRIPTION: Convert fixed-offset references to resource descriptors to
   *              symbolic references. Should only be called after namespace has
   *              been cross referenced.
   *
   ******************************************************************************/
  
  static ACPI_STATUS
  AcpiDmProcessResourceDescriptors (
      ACPI_PARSE_OBJECT       *Op,
      UINT32                  Level,
      void                    *Context)
  {
      ACPI_OP_WALK_INFO       *Info = Context;
      const ACPI_OPCODE_INFO  *OpInfo;
      ACPI_WALK_STATE         *WalkState;
      ACPI_OBJECT_TYPE        ObjectType;
      ACPI_STATUS             Status;
  
  
      WalkState = Info->WalkState;
      OpInfo = AcpiPsGetOpcodeInfo (Op->Common.AmlOpcode);
  
      /* Open new scope if necessary */
  
      ObjectType = OpInfo->ObjectType;
      if (AcpiNsOpensScope (ObjectType))
      {
          if (Op->Common.Node)
          {
  
              Status = AcpiDsScopeStackPush (Op->Common.Node, ObjectType,
                  WalkState);
              if (ACPI_FAILURE (Status))
              {
                  return (Status);
              }
          }
      }
  
      /*
       * Check if this operator contains a reference to a resource descriptor.
       * If so, convert the reference into a symbolic reference.
       */
      AcpiDmCheckResourceReference (Op, WalkState);
      return (AE_OK);
  }
  
  /*******************************************************************************
   *
   * FUNCTION:    AcpiDmCommonAscendingOp
   *
   * PARAMETERS:  ASL_WALK_CALLBACK
   *
   * RETURN:      None
   *
   * DESCRIPTION: Ascending handler for combined parse/namespace walks. Closes
   *              scope if necessary.
   *
   ******************************************************************************/
  
  static ACPI_STATUS
  AcpiDmCommonAscendingOp (
      ACPI_PARSE_OBJECT       *Op,
      UINT32                  Level,
      void                    *Context)
  {
      ACPI_OP_WALK_INFO       *Info = Context;
      ACPI_OBJECT_TYPE        ObjectType;
  
  
      /* Close scope if necessary */
  
      ObjectType = AslMapNamedOpcodeToDataType (Op->Asl.AmlOpcode);
  
      if (AcpiNsOpensScope (ObjectType))
      {
          (void) AcpiDsScopeStackPop (Info->WalkState);
      }
  
      return (AE_OK);
  }
  
  /*******************************************************************************
   *
   * FUNCTION:    AcpiDmInspectPossibleArgs
   *
   * PARAMETERS:  CurrentOpArgCount   - Which arg of the current op was the
   *                                    possible method invocation found
   *              TargetCount         - Number of targets (0,1,2) for this op
   *              Op                  - Parse op
   *
   * RETURN:      Status
   *
   * DESCRIPTION: Examine following args and next ops for possible arguments
   *              for an unrecognized method invocation.
   *
   ******************************************************************************/
  
  static UINT32
  AcpiDmInspectPossibleArgs (
      UINT32                  CurrentOpArgCount,
      UINT32                  TargetCount,
      ACPI_PARSE_OBJECT       *Op)
  {
      const ACPI_OPCODE_INFO  *OpInfo;
      UINT32                  i;
      UINT32                  ArgumentCount = 0;
      ACPI_PARSE_OBJECT       *NextOp;
      ACPI_PARSE_OBJECT       *ExecuteOp;
  
  
      if (!Op)
      {
          return (0);
      }
  
      /* Lookahead for the maximum number of possible arguments */
  
      NextOp = Op->Common.Next;
  
      for (i = 0; (i < ACPI_METHOD_NUM_ARGS) && NextOp; i++)
      {
          OpInfo = AcpiPsGetOpcodeInfo (NextOp->Common.AmlOpcode);
  
          /* Any one of these operators is "very probably" not a method arg */
  
          if ((NextOp->Common.AmlOpcode == AML_STORE_OP) ||
              (NextOp->Common.AmlOpcode == AML_NOTIFY_OP) ||
              (OpInfo->Class == AML_CLASS_CONTROL) ||
              (OpInfo->Class == AML_CLASS_CREATE) ||
              (OpInfo->Class == AML_CLASS_NAMED_OBJECT))
          {
              break;
          }
  
          if (OpInfo->Class == AML_CLASS_EXECUTE)
          {
              /* Probable that this is method arg if there is no target */
  
              ExecuteOp = NextOp->Common.Value.Arg;
              while (ExecuteOp)
              {
                  if ((ExecuteOp->Common.AmlOpcode == AML_INT_NAMEPATH_OP) &&
                      (ExecuteOp->Common.Value.Arg == NULL))
                  {
                      /* No target, could be a method arg */
  
                      break;
                  }
  
                  if (NextOp->Common.AmlOpcode == AML_REF_OF_OP)
                  {
                      break;
                  }
  
                  ExecuteOp = ExecuteOp->Common.Next;
              }
  
              if (!ExecuteOp)
              {
                  /* Has a target, not method arg */
  
                  return (ArgumentCount);
              }
          }
  
          ArgumentCount++;
          NextOp = NextOp->Common.Next;
      }
  
      return (ArgumentCount);
  }

Cache object: 4001cac0cd09c393810bb6518adc24cb