532 lines
17 KiB
C
532 lines
17 KiB
C
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/******************************************************************************
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*
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* Module Name: exnames - interpreter/scanner name load/execute
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* $Revision: 95 $
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*
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*****************************************************************************/
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/******************************************************************************
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*
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* 1. Copyright Notice
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*
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* Some or all of this work - Copyright (c) 1999 - 2004, Intel Corp.
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* All rights reserved.
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*
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* 2. License
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*
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* 2.1. This is your license from Intel Corp. under its intellectual property
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* rights. You may have additional license terms from the party that provided
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* you this software, covering your right to use that party's intellectual
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* property rights.
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*
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* 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
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* copy of the source code appearing in this file ("Covered Code") an
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* irrevocable, perpetual, worldwide license under Intel's copyrights in the
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* base code distributed originally by Intel ("Original Intel Code") to copy,
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* make derivatives, distribute, use and display any portion of the Covered
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* Code in any form, with the right to sublicense such rights; and
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*
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* 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
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* license (with the right to sublicense), under only those claims of Intel
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* patents that are infringed by the Original Intel Code, to make, use, sell,
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* offer to sell, and import the Covered Code and derivative works thereof
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* solely to the minimum extent necessary to exercise the above copyright
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* license, and in no event shall the patent license extend to any additions
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* to or modifications of the Original Intel Code. No other license or right
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* is granted directly or by implication, estoppel or otherwise;
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*
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* The above copyright and patent license is granted only if the following
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* conditions are met:
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*
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* 3. Conditions
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*
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* 3.1. Redistribution of Source with Rights to Further Distribute Source.
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* Redistribution of source code of any substantial portion of the Covered
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* Code or modification with rights to further distribute source must include
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* the above Copyright Notice, the above License, this list of Conditions,
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* and the following Disclaimer and Export Compliance provision. In addition,
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* Licensee must cause all Covered Code to which Licensee contributes to
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* contain a file documenting the changes Licensee made to create that Covered
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* Code and the date of any change. Licensee must include in that file the
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* documentation of any changes made by any predecessor Licensee. Licensee
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* must include a prominent statement that the modification is derived,
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* directly or indirectly, from Original Intel Code.
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*
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* 3.2. Redistribution of Source with no Rights to Further Distribute Source.
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* Redistribution of source code of any substantial portion of the Covered
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* Code or modification without rights to further distribute source must
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* include the following Disclaimer and Export Compliance provision in the
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* documentation and/or other materials provided with distribution. In
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* addition, Licensee may not authorize further sublicense of source of any
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* portion of the Covered Code, and must include terms to the effect that the
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* license from Licensee to its licensee is limited to the intellectual
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* property embodied in the software Licensee provides to its licensee, and
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* not to intellectual property embodied in modifications its licensee may
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* make.
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*
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* 3.3. Redistribution of Executable. Redistribution in executable form of any
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* substantial portion of the Covered Code or modification must reproduce the
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* above Copyright Notice, and the following Disclaimer and Export Compliance
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* provision in the documentation and/or other materials provided with the
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* distribution.
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*
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* 3.4. Intel retains all right, title, and interest in and to the Original
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* Intel Code.
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*
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* 3.5. Neither the name Intel nor any other trademark owned or controlled by
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* Intel shall be used in advertising or otherwise to promote the sale, use or
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* other dealings in products derived from or relating to the Covered Code
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* without prior written authorization from Intel.
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*
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* 4. Disclaimer and Export Compliance
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*
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* 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
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* HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
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* IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
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* INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
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* UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
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* IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
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* PARTICULAR PURPOSE.
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*
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* 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
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* OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
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* COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
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* SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
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* CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
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* HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
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* SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
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* LIMITED REMEDY.
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*
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* 4.3. Licensee shall not export, either directly or indirectly, any of this
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* software or system incorporating such software without first obtaining any
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* required license or other approval from the U. S. Department of Commerce or
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* any other agency or department of the United States Government. In the
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* event Licensee exports any such software from the United States or
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* re-exports any such software from a foreign destination, Licensee shall
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* ensure that the distribution and export/re-export of the software is in
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* compliance with all laws, regulations, orders, or other restrictions of the
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* U.S. Export Administration Regulations. Licensee agrees that neither it nor
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* any of its subsidiaries will export/re-export any technical data, process,
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* software, or service, directly or indirectly, to any country for which the
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* United States government or any agency thereof requires an export license,
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* other governmental approval, or letter of assurance, without first obtaining
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* such license, approval or letter.
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*
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*****************************************************************************/
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#define __EXNAMES_C__
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#include "acpi.h"
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#include "acinterp.h"
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#include "amlcode.h"
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#define _COMPONENT ACPI_EXECUTER
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ACPI_MODULE_NAME ("exnames")
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/* AML Package Length encodings */
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#define ACPI_AML_PACKAGE_TYPE1 0x40
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#define ACPI_AML_PACKAGE_TYPE2 0x4000
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#define ACPI_AML_PACKAGE_TYPE3 0x400000
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#define ACPI_AML_PACKAGE_TYPE4 0x40000000
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/*******************************************************************************
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*
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* FUNCTION: AcpiExAllocateNameString
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*
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* PARAMETERS: PrefixCount - Count of parent levels. Special cases:
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* (-1) = root, 0 = none
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* NumNameSegs - count of 4-character name segments
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*
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* RETURN: A pointer to the allocated string segment. This segment must
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* be deleted by the caller.
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*
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* DESCRIPTION: Allocate a buffer for a name string. Ensure allocated name
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* string is long enough, and set up prefix if any.
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*
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******************************************************************************/
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char *
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AcpiExAllocateNameString (
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UINT32 PrefixCount,
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UINT32 NumNameSegs)
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{
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char *TempPtr;
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char *NameString;
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UINT32 SizeNeeded;
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ACPI_FUNCTION_TRACE ("ExAllocateNameString");
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/*
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* Allow room for all \ and ^ prefixes, all segments, and a MultiNamePrefix.
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* Also, one byte for the null terminator.
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* This may actually be somewhat longer than needed.
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*/
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if (PrefixCount == ACPI_UINT32_MAX)
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{
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/* Special case for root */
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SizeNeeded = 1 + (ACPI_NAME_SIZE * NumNameSegs) + 2 + 1;
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}
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else
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{
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SizeNeeded = PrefixCount + (ACPI_NAME_SIZE * NumNameSegs) + 2 + 1;
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}
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/*
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* Allocate a buffer for the name.
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* This buffer must be deleted by the caller!
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*/
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NameString = ACPI_MEM_ALLOCATE (SizeNeeded);
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if (!NameString)
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{
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ACPI_REPORT_ERROR (("ExAllocateNameString: Could not allocate size %d\n", SizeNeeded));
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return_PTR (NULL);
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}
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TempPtr = NameString;
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/* Set up Root or Parent prefixes if needed */
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if (PrefixCount == ACPI_UINT32_MAX)
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{
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*TempPtr++ = AML_ROOT_PREFIX;
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}
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else
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{
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while (PrefixCount--)
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{
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*TempPtr++ = AML_PARENT_PREFIX;
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}
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}
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/* Set up Dual or Multi prefixes if needed */
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if (NumNameSegs > 2)
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{
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/* Set up multi prefixes */
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*TempPtr++ = AML_MULTI_NAME_PREFIX_OP;
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*TempPtr++ = (char) NumNameSegs;
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}
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else if (2 == NumNameSegs)
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{
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/* Set up dual prefixes */
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*TempPtr++ = AML_DUAL_NAME_PREFIX;
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}
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/*
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* Terminate string following prefixes. AcpiExNameSegment() will
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* append the segment(s)
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*/
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*TempPtr = 0;
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return_PTR (NameString);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiExNameSegment
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*
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* PARAMETERS: InterpreterMode - Current running mode (load1/Load2/Exec)
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*
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* RETURN: Status
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*
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* DESCRIPTION: Execute a name segment (4 bytes)
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiExNameSegment (
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UINT8 **InAmlAddress,
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char *NameString)
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{
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char *AmlAddress = (void *) *InAmlAddress;
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ACPI_STATUS Status = AE_OK;
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UINT32 Index;
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char CharBuf[5];
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ACPI_FUNCTION_TRACE ("ExNameSegment");
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/*
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* If first character is a digit, then we know that we aren't looking at a
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* valid name segment
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*/
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CharBuf[0] = *AmlAddress;
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if ('0' <= CharBuf[0] && CharBuf[0] <= '9')
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{
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ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "leading digit: %c\n", CharBuf[0]));
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return_ACPI_STATUS (AE_CTRL_PENDING);
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}
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ACPI_DEBUG_PRINT ((ACPI_DB_LOAD, "Bytes from stream:\n"));
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for (Index = 0;
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(Index < ACPI_NAME_SIZE) && (AcpiUtValidAcpiCharacter (*AmlAddress));
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Index++)
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{
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CharBuf[Index] = *AmlAddress++;
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ACPI_DEBUG_PRINT ((ACPI_DB_LOAD, "%c\n", CharBuf[Index]));
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}
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/* Valid name segment */
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if (Index == 4)
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{
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/* Found 4 valid characters */
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CharBuf[4] = '\0';
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if (NameString)
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{
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ACPI_STRCAT (NameString, CharBuf);
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ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
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"Appended to - %s \n", NameString));
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}
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else
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{
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ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
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"No Name string - %s \n", CharBuf));
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}
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}
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else if (Index == 0)
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{
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/*
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* First character was not a valid name character,
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* so we are looking at something other than a name.
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*/
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ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
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"Leading character is not alpha: %02Xh (not a name)\n",
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CharBuf[0]));
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Status = AE_CTRL_PENDING;
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}
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else
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{
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/* Segment started with one or more valid characters, but fewer than 4 */
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Status = AE_AML_BAD_NAME;
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ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Bad character %02x in name, at %p\n",
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*AmlAddress, AmlAddress));
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}
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*InAmlAddress = (UINT8 *) AmlAddress;
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return_ACPI_STATUS (Status);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiExGetNameString
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*
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* PARAMETERS: DataType - Data type to be associated with this name
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*
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* RETURN: Status
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*
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* DESCRIPTION: Get a name, including any prefixes.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiExGetNameString (
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ACPI_OBJECT_TYPE DataType,
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UINT8 *InAmlAddress,
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char **OutNameString,
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UINT32 *OutNameLength)
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{
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ACPI_STATUS Status = AE_OK;
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UINT8 *AmlAddress = InAmlAddress;
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char *NameString = NULL;
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UINT32 NumSegments;
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UINT32 PrefixCount = 0;
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BOOLEAN HasPrefix = FALSE;
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ACPI_FUNCTION_TRACE_PTR ("ExGetNameString", AmlAddress);
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if (ACPI_TYPE_LOCAL_REGION_FIELD == DataType ||
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ACPI_TYPE_LOCAL_BANK_FIELD == DataType ||
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ACPI_TYPE_LOCAL_INDEX_FIELD == DataType)
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{
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/* Disallow prefixes for types associated with FieldUnit names */
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NameString = AcpiExAllocateNameString (0, 1);
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if (!NameString)
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{
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Status = AE_NO_MEMORY;
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}
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else
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{
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Status = AcpiExNameSegment (&AmlAddress, NameString);
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}
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}
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else
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{
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/*
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* DataType is not a field name.
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* Examine first character of name for root or parent prefix operators
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*/
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switch (*AmlAddress)
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{
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case AML_ROOT_PREFIX:
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ACPI_DEBUG_PRINT ((ACPI_DB_LOAD, "RootPrefix(\\) at %p\n", AmlAddress));
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/*
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* Remember that we have a RootPrefix --
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* see comment in AcpiExAllocateNameString()
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*/
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AmlAddress++;
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PrefixCount = ACPI_UINT32_MAX;
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HasPrefix = TRUE;
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break;
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case AML_PARENT_PREFIX:
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/* Increment past possibly multiple parent prefixes */
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do
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{
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ACPI_DEBUG_PRINT ((ACPI_DB_LOAD, "ParentPrefix (^) at %p\n", AmlAddress));
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AmlAddress++;
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PrefixCount++;
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} while (*AmlAddress == AML_PARENT_PREFIX);
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HasPrefix = TRUE;
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break;
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default:
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/* Not a prefix character */
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break;
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}
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/* Examine first character of name for name segment prefix operator */
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switch (*AmlAddress)
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{
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case AML_DUAL_NAME_PREFIX:
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ACPI_DEBUG_PRINT ((ACPI_DB_LOAD, "DualNamePrefix at %p\n", AmlAddress));
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AmlAddress++;
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NameString = AcpiExAllocateNameString (PrefixCount, 2);
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if (!NameString)
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{
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Status = AE_NO_MEMORY;
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break;
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}
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/* Indicate that we processed a prefix */
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HasPrefix = TRUE;
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Status = AcpiExNameSegment (&AmlAddress, NameString);
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if (ACPI_SUCCESS (Status))
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{
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Status = AcpiExNameSegment (&AmlAddress, NameString);
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}
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break;
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case AML_MULTI_NAME_PREFIX_OP:
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ACPI_DEBUG_PRINT ((ACPI_DB_LOAD, "MultiNamePrefix at %p\n", AmlAddress));
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/* Fetch count of segments remaining in name path */
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AmlAddress++;
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NumSegments = *AmlAddress;
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NameString = AcpiExAllocateNameString (PrefixCount, NumSegments);
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if (!NameString)
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{
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Status = AE_NO_MEMORY;
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break;
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}
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/* Indicate that we processed a prefix */
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AmlAddress++;
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HasPrefix = TRUE;
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while (NumSegments &&
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(Status = AcpiExNameSegment (&AmlAddress, NameString)) == AE_OK)
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{
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NumSegments--;
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}
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break;
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case 0:
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/* NullName valid as of 8-12-98 ASL/AML Grammar Update */
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if (PrefixCount == ACPI_UINT32_MAX)
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{
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ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "NameSeg is \"\\\" followed by NULL\n"));
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}
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/* Consume the NULL byte */
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AmlAddress++;
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NameString = AcpiExAllocateNameString (PrefixCount, 0);
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if (!NameString)
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{
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Status = AE_NO_MEMORY;
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break;
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}
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break;
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default:
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/* Name segment string */
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NameString = AcpiExAllocateNameString (PrefixCount, 1);
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if (!NameString)
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{
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Status = AE_NO_MEMORY;
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break;
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}
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Status = AcpiExNameSegment (&AmlAddress, NameString);
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break;
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}
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}
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if (AE_CTRL_PENDING == Status && HasPrefix)
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{
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/* Ran out of segments after processing a prefix */
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ACPI_REPORT_ERROR (
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("ExDoName: Malformed Name at %p\n", NameString));
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Status = AE_AML_BAD_NAME;
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}
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*OutNameString = NameString;
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*OutNameLength = (UINT32) (AmlAddress - InAmlAddress);
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return_ACPI_STATUS (Status);
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}
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