611 lines
18 KiB
C
611 lines
18 KiB
C
/******************************************************************************
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*
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* Module Name: aslanalyze.c - Support functions for parse tree walks
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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 - 2011, 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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#include "aslcompiler.h"
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#include "aslcompiler.y.h"
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#include <string.h>
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#define _COMPONENT ACPI_COMPILER
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ACPI_MODULE_NAME ("aslanalyze")
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/*******************************************************************************
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*
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* FUNCTION: AnIsInternalMethod
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*
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* PARAMETERS: Op - Current op
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*
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* RETURN: Boolean
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*
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* DESCRIPTION: Check for an internal control method.
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*
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******************************************************************************/
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BOOLEAN
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AnIsInternalMethod (
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ACPI_PARSE_OBJECT *Op)
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{
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if ((!ACPI_STRCMP (Op->Asl.ExternalName, "\\_OSI")) ||
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(!ACPI_STRCMP (Op->Asl.ExternalName, "_OSI")))
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{
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return (TRUE);
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}
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return (FALSE);
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}
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/*******************************************************************************
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*
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* FUNCTION: AnGetInternalMethodReturnType
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*
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* PARAMETERS: Op - Current op
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*
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* RETURN: Btype
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*
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* DESCRIPTION: Get the return type of an internal method
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*
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******************************************************************************/
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UINT32
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AnGetInternalMethodReturnType (
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ACPI_PARSE_OBJECT *Op)
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{
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if ((!ACPI_STRCMP (Op->Asl.ExternalName, "\\_OSI")) ||
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(!ACPI_STRCMP (Op->Asl.ExternalName, "_OSI")))
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{
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return (ACPI_BTYPE_STRING);
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}
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return (0);
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}
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/*******************************************************************************
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*
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* FUNCTION: AnCheckId
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*
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* PARAMETERS: Op - Current parse op
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* Type - HID or CID
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*
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* RETURN: None
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*
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* DESCRIPTION: Perform various checks on _HID and _CID strings. Only limited
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* checks can be performed on _CID strings.
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*
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******************************************************************************/
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void
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AnCheckId (
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ACPI_PARSE_OBJECT *Op,
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ACPI_NAME Type)
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{
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UINT32 i;
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ACPI_SIZE Length;
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UINT32 AlphaPrefixLength;
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/* Only care about string versions of _HID/_CID (integers are legal) */
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if (Op->Asl.ParseOpcode != PARSEOP_STRING_LITERAL)
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{
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return;
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}
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/* For both _HID and _CID, the string must be non-null */
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Length = strlen (Op->Asl.Value.String);
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if (!Length)
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{
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AslError (ASL_ERROR, ASL_MSG_NULL_STRING,
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Op, NULL);
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return;
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}
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/*
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* One of the things we want to catch here is the use of a leading
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* asterisk in the string -- an odd construct that certain platform
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* manufacturers are fond of. Technically, a leading asterisk is OK
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* for _CID, but a valid use of this has not been seen.
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*/
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if (*Op->Asl.Value.String == '*')
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{
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AslError (ASL_ERROR, ASL_MSG_LEADING_ASTERISK,
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Op, Op->Asl.Value.String);
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return;
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}
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/* _CID strings are bus-specific, no more checks can be performed */
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if (Type == ASL_TYPE_CID)
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{
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return;
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}
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/* For _HID, all characters must be alphanumeric */
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for (i = 0; Op->Asl.Value.String[i]; i++)
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{
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if (!isalnum ((int) Op->Asl.Value.String[i]))
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{
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AslError (ASL_ERROR, ASL_MSG_ALPHANUMERIC_STRING,
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Op, Op->Asl.Value.String);
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break;
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}
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}
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/* _HID String must be of the form "XXX####" or "ACPI####" */
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if ((Length < 7) || (Length > 8))
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{
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AslError (ASL_ERROR, ASL_MSG_HID_LENGTH,
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Op, Op->Asl.Value.String);
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return;
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}
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/* _HID Length is valid, now check for uppercase (first 3 or 4 chars) */
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AlphaPrefixLength = 3;
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if (Length >= 8)
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{
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AlphaPrefixLength = 4;
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}
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/* Ensure the alphabetic prefix is all uppercase */
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for (i = 0; (i < AlphaPrefixLength) && Op->Asl.Value.String[i]; i++)
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{
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if (!isupper ((int) Op->Asl.Value.String[i]))
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{
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AslError (ASL_ERROR, ASL_MSG_UPPER_CASE,
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Op, &Op->Asl.Value.String[i]);
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break;
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}
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}
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}
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/*******************************************************************************
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*
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* FUNCTION: AnLastStatementIsReturn
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*
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* PARAMETERS: Op - A method parse node
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*
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* RETURN: TRUE if last statement is an ASL RETURN. False otherwise
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*
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* DESCRIPTION: Walk down the list of top level statements within a method
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* to find the last one. Check if that last statement is in
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* fact a RETURN statement.
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*
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******************************************************************************/
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BOOLEAN
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AnLastStatementIsReturn (
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ACPI_PARSE_OBJECT *Op)
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{
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ACPI_PARSE_OBJECT *Next;
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/* Check if last statement is a return */
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Next = ASL_GET_CHILD_NODE (Op);
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while (Next)
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{
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if ((!Next->Asl.Next) &&
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(Next->Asl.ParseOpcode == PARSEOP_RETURN))
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{
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return (TRUE);
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}
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Next = ASL_GET_PEER_NODE (Next);
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}
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return (FALSE);
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}
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/*******************************************************************************
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*
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* FUNCTION: AnCheckMethodReturnValue
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*
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* PARAMETERS: Op - Parent
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* OpInfo - Parent info
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* ArgOp - Method invocation op
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* RequiredBtypes - What caller requires
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* ThisNodeBtype - What this node returns (if anything)
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*
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* RETURN: None
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*
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* DESCRIPTION: Check a method invocation for 1) A return value and if it does
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* in fact return a value, 2) check the type of the return value.
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*
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******************************************************************************/
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void
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AnCheckMethodReturnValue (
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ACPI_PARSE_OBJECT *Op,
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const ACPI_OPCODE_INFO *OpInfo,
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ACPI_PARSE_OBJECT *ArgOp,
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UINT32 RequiredBtypes,
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UINT32 ThisNodeBtype)
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{
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ACPI_PARSE_OBJECT *OwningOp;
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ACPI_NAMESPACE_NODE *Node;
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Node = ArgOp->Asl.Node;
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/* Examine the parent op of this method */
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OwningOp = Node->Op;
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if (OwningOp->Asl.CompileFlags & NODE_METHOD_NO_RETVAL)
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{
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/* Method NEVER returns a value */
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AslError (ASL_ERROR, ASL_MSG_NO_RETVAL, Op, Op->Asl.ExternalName);
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}
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else if (OwningOp->Asl.CompileFlags & NODE_METHOD_SOME_NO_RETVAL)
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{
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/* Method SOMETIMES returns a value, SOMETIMES not */
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AslError (ASL_WARNING, ASL_MSG_SOME_NO_RETVAL, Op, Op->Asl.ExternalName);
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}
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else if (!(ThisNodeBtype & RequiredBtypes))
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{
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/* Method returns a value, but the type is wrong */
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AnFormatBtype (StringBuffer, ThisNodeBtype);
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AnFormatBtype (StringBuffer2, RequiredBtypes);
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/*
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* The case where the method does not return any value at all
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* was already handled in the namespace cross reference
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* -- Only issue an error if the method in fact returns a value,
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* but it is of the wrong type
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*/
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if (ThisNodeBtype != 0)
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{
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sprintf (MsgBuffer,
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"Method returns [%s], %s operator requires [%s]",
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StringBuffer, OpInfo->Name, StringBuffer2);
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AslError (ASL_ERROR, ASL_MSG_INVALID_TYPE, ArgOp, MsgBuffer);
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}
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}
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}
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/*******************************************************************************
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*
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* FUNCTION: AnIsResultUsed
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*
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* PARAMETERS: Op - Parent op for the operator
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*
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* RETURN: TRUE if result from this operation is actually consumed
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*
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* DESCRIPTION: Determine if the function result value from an operator is
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* used.
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*
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******************************************************************************/
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BOOLEAN
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AnIsResultUsed (
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ACPI_PARSE_OBJECT *Op)
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{
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ACPI_PARSE_OBJECT *Parent;
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switch (Op->Asl.ParseOpcode)
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{
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case PARSEOP_INCREMENT:
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case PARSEOP_DECREMENT:
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/* These are standalone operators, no return value */
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return (TRUE);
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default:
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break;
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}
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/* Examine parent to determine if the return value is used */
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Parent = Op->Asl.Parent;
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switch (Parent->Asl.ParseOpcode)
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{
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/* If/While - check if the operator is the predicate */
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case PARSEOP_IF:
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case PARSEOP_WHILE:
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/* First child is the predicate */
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if (Parent->Asl.Child == Op)
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{
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return (TRUE);
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}
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return (FALSE);
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/* Not used if one of these is the parent */
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case PARSEOP_METHOD:
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case PARSEOP_DEFINITIONBLOCK:
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case PARSEOP_ELSE:
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return (FALSE);
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default:
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/* Any other type of parent means that the result is used */
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return (TRUE);
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}
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}
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/*******************************************************************************
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*
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* FUNCTION: ApCheckForGpeNameConflict
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*
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* PARAMETERS: Op - Current parse op
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*
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* RETURN: None
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*
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* DESCRIPTION: Check for a conflict between GPE names within this scope.
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* Conflict means two GPE names with the same GPE number, but
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* different types -- such as _L1C and _E1C.
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*
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******************************************************************************/
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void
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ApCheckForGpeNameConflict (
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ACPI_PARSE_OBJECT *Op)
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{
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ACPI_PARSE_OBJECT *NextOp;
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UINT32 GpeNumber;
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char Name[ACPI_NAME_SIZE + 1];
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char Target[ACPI_NAME_SIZE];
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/* Need a null-terminated string version of NameSeg */
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ACPI_MOVE_32_TO_32 (Name, &Op->Asl.NameSeg);
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Name[ACPI_NAME_SIZE] = 0;
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/*
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* For a GPE method:
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* 1st char must be underscore
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* 2nd char must be L or E
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* 3rd/4th chars must be a hex number
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*/
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if ((Name[0] != '_') ||
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((Name[1] != 'L') && (Name[1] != 'E')))
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{
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return;
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}
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/* Verify 3rd/4th chars are a valid hex value */
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GpeNumber = ACPI_STRTOUL (&Name[2], NULL, 16);
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if (GpeNumber == ACPI_UINT32_MAX)
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{
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return;
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}
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/*
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* We are now sure we have an _Lxx or _Exx.
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* Create the target name that would cause collision (Flip E/L)
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*/
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ACPI_MOVE_32_TO_32 (Target, Name);
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/* Inject opposite letter ("L" versus "E") */
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if (Name[1] == 'L')
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{
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Target[1] = 'E';
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}
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else /* Name[1] == 'E' */
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{
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Target[1] = 'L';
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}
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/* Search all peers (objects within this scope) for target match */
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NextOp = Op->Asl.Next;
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while (NextOp)
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{
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/*
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* We mostly care about methods, but check Name() constructs also,
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* even though they will get another error for not being a method.
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* All GPE names must be defined as control methods.
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*/
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if ((NextOp->Asl.ParseOpcode == PARSEOP_METHOD) ||
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(NextOp->Asl.ParseOpcode == PARSEOP_NAME))
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{
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if (ACPI_COMPARE_NAME (Target, NextOp->Asl.NameSeg))
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{
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/* Found both _Exy and _Lxy in the same scope, error */
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AslError (ASL_ERROR, ASL_MSG_GPE_NAME_CONFLICT, NextOp,
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Name);
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return;
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}
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}
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NextOp = NextOp->Asl.Next;
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}
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/* OK, no conflict found */
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return;
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}
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/*******************************************************************************
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*
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* FUNCTION: ApCheckRegMethod
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*
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* PARAMETERS: Op - Current parse op
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*
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* RETURN: None
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*
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* DESCRIPTION: Ensure that a _REG method has a corresponding Operation
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* Region declaration within the same scope. Note: _REG is defined
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* to have two arguments and must therefore be defined as a
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* control method.
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*
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******************************************************************************/
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void
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ApCheckRegMethod (
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ACPI_PARSE_OBJECT *Op)
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{
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ACPI_PARSE_OBJECT *Next;
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ACPI_PARSE_OBJECT *Parent;
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/* We are only interested in _REG methods */
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if (!ACPI_COMPARE_NAME (METHOD_NAME__REG, &Op->Asl.NameSeg))
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{
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return;
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}
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/* Get the start of the current scope */
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Parent = Op->Asl.Parent;
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Next = Parent->Asl.Child;
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/* Search entire scope for an operation region declaration */
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while (Next)
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{
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if (Next->Asl.ParseOpcode == PARSEOP_OPERATIONREGION)
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{
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return; /* Found region, OK */
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}
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Next = Next->Asl.Next;
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}
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/* No region found, issue warning */
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AslError (ASL_WARNING, ASL_MSG_NO_REGION, Op, NULL);
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}
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