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481 lines
15 KiB
C
481 lines
15 KiB
C
/******************************************************************************
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*
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* Module Name: dtexpress.c - Support for integer expressions and labels
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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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#define __DTEXPRESS_C__
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#include "aslcompiler.h"
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#include "dtcompiler.h"
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#include "dtparser.y.h"
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#define _COMPONENT DT_COMPILER
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ACPI_MODULE_NAME ("dtexpress")
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/* Local prototypes */
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static void
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DtInsertLabelField (
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DT_FIELD *Field);
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static DT_FIELD *
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DtLookupLabel (
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char *Name);
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/* Global used for errors during parse and related functions */
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DT_FIELD *Gbl_CurrentField;
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/******************************************************************************
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*
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* FUNCTION: DtResolveIntegerExpression
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*
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* PARAMETERS: Field - Field object with Integer expression
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* ReturnValue - Where the integer is returned
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*
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* RETURN: Status, and the resolved 64-bit integer value
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*
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* DESCRIPTION: Resolve an integer expression to a single value. Supports
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* both integer constants and labels.
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*
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*****************************************************************************/
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ACPI_STATUS
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DtResolveIntegerExpression (
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DT_FIELD *Field,
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UINT64 *ReturnValue)
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{
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UINT64 Result;
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DbgPrint (ASL_DEBUG_OUTPUT, "Full Integer expression: %s\n",
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Field->Value);
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Gbl_CurrentField = Field;
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Result = DtEvaluateExpression (Field->Value);
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*ReturnValue = Result;
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return (AE_OK);
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}
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/******************************************************************************
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*
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* FUNCTION: DtDoOperator
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*
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* PARAMETERS: LeftValue - First 64-bit operand
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* Operator - Parse token for the operator (EXPOP_*)
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* RightValue - Second 64-bit operand
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*
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* RETURN: 64-bit result of the requested operation
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*
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* DESCRIPTION: Perform the various 64-bit integer math functions
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*
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*****************************************************************************/
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UINT64
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DtDoOperator (
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UINT64 LeftValue,
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UINT32 Operator,
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UINT64 RightValue)
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{
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UINT64 Result;
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/* Perform the requested operation */
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switch (Operator)
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{
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case EXPOP_ONES_COMPLIMENT:
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Result = ~RightValue;
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break;
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case EXPOP_LOGICAL_NOT:
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Result = !RightValue;
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break;
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case EXPOP_MULTIPLY:
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Result = LeftValue * RightValue;
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break;
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case EXPOP_DIVIDE:
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if (!RightValue)
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{
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DtError (ASL_ERROR, ASL_MSG_DIVIDE_BY_ZERO,
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Gbl_CurrentField, Gbl_CurrentField->Value);
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return (0);
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}
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Result = LeftValue / RightValue;
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break;
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case EXPOP_MODULO:
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if (!RightValue)
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{
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DtError (ASL_ERROR, ASL_MSG_DIVIDE_BY_ZERO,
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Gbl_CurrentField, Gbl_CurrentField->Value);
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return (0);
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}
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Result = LeftValue % RightValue;
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break;
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case EXPOP_ADD:
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Result = LeftValue + RightValue;
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break;
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case EXPOP_SUBTRACT:
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Result = LeftValue - RightValue;
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break;
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case EXPOP_SHIFT_RIGHT:
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Result = LeftValue >> RightValue;
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break;
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case EXPOP_SHIFT_LEFT:
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Result = LeftValue << RightValue;
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break;
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case EXPOP_LESS:
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Result = LeftValue < RightValue;
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break;
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case EXPOP_GREATER:
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Result = LeftValue > RightValue;
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break;
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case EXPOP_LESS_EQUAL:
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Result = LeftValue <= RightValue;
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break;
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case EXPOP_GREATER_EQUAL:
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Result = LeftValue >= RightValue;
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break;
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case EXPOP_EQUAL:
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Result = LeftValue = RightValue;
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break;
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case EXPOP_NOT_EQUAL:
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Result = LeftValue != RightValue;
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break;
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case EXPOP_AND:
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Result = LeftValue & RightValue;
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break;
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case EXPOP_XOR:
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Result = LeftValue ^ RightValue;
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break;
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case EXPOP_OR:
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Result = LeftValue | RightValue;
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break;
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case EXPOP_LOGICAL_AND:
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Result = LeftValue && RightValue;
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break;
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case EXPOP_LOGICAL_OR:
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Result = LeftValue || RightValue;
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break;
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default:
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/* Unknown operator */
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DtFatal (ASL_MSG_INVALID_EXPRESSION,
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Gbl_CurrentField, Gbl_CurrentField->Value);
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return (0);
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}
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DbgPrint (ASL_DEBUG_OUTPUT,
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"IntegerEval: %s (%8.8X%8.8X %s %8.8X%8.8X) = %8.8X%8.8X\n",
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Gbl_CurrentField->Value,
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ACPI_FORMAT_UINT64 (LeftValue),
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DtGetOpName (Operator),
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ACPI_FORMAT_UINT64 (RightValue),
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ACPI_FORMAT_UINT64 (Result));
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return (Result);
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}
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/******************************************************************************
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*
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* FUNCTION: DtResolveLabel
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*
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* PARAMETERS: LabelString - Contains the label
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*
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* RETURN: Table offset associated with the label
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*
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* DESCRIPTION: Lookup a lable and return its value.
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*
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*****************************************************************************/
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UINT64
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DtResolveLabel (
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char *LabelString)
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{
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DT_FIELD *LabelField;
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DbgPrint (ASL_DEBUG_OUTPUT, "Resolve Label: %s\n", LabelString);
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/* Resolve a label reference to an integer (table offset) */
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if (*LabelString != '$')
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{
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return (0);
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}
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LabelField = DtLookupLabel (LabelString);
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if (!LabelField)
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{
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DtError (ASL_ERROR, ASL_MSG_UNKNOWN_LABEL,
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Gbl_CurrentField, LabelString);
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return (0);
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}
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/* All we need from the label is the offset in the table */
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DbgPrint (ASL_DEBUG_OUTPUT, "Resolved Label: 0x%8.8X\n",
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LabelField->TableOffset);
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return (LabelField->TableOffset);
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}
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/******************************************************************************
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*
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* FUNCTION: DtDetectAllLabels
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*
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* PARAMETERS: FieldList - Field object at start of generic list
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*
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* RETURN: None
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*
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* DESCRIPTION: Detect all labels in a list of "generic" opcodes (such as
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* a UEFI table.) and insert them into the global label list.
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*
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*****************************************************************************/
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void
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DtDetectAllLabels (
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DT_FIELD *FieldList)
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{
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ACPI_DMTABLE_INFO *Info;
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DT_FIELD *GenericField;
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UINT32 TableOffset;
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TableOffset = Gbl_CurrentTableOffset;
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GenericField = FieldList;
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/*
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* Process all "Label:" fields within the parse tree. We need
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* to know the offsets for all labels before we can compile
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* the parse tree in order to handle forward references. Traverse
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* tree and get/set all field lengths of all operators in order to
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* determine the label offsets.
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*/
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while (GenericField)
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{
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Info = DtGetGenericTableInfo (GenericField->Name);
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if (Info)
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{
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/* Maintain table offsets */
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GenericField->TableOffset = TableOffset;
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TableOffset += DtGetFieldLength (GenericField, Info);
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/* Insert all labels in the global label list */
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if (Info->Opcode == ACPI_DMT_LABEL)
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{
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DtInsertLabelField (GenericField);
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}
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}
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GenericField = GenericField->Next;
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}
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}
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/******************************************************************************
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*
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* FUNCTION: DtInsertLabelField
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*
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* PARAMETERS: Field - Field object with Label to be inserted
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*
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* RETURN: None
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*
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* DESCRIPTION: Insert a label field into the global label list
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*
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*****************************************************************************/
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static void
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DtInsertLabelField (
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DT_FIELD *Field)
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{
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DbgPrint (ASL_DEBUG_OUTPUT,
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"DtInsertLabelField: Found Label : %s at output table offset %X\n",
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Field->Value, Field->TableOffset);
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Field->NextLabel = Gbl_LabelList;
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Gbl_LabelList = Field;
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}
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/******************************************************************************
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*
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* FUNCTION: DtLookupLabel
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*
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* PARAMETERS: Name - Label to be resolved
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*
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* RETURN: Field object associated with the label
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*
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* DESCRIPTION: Lookup a label in the global label list. Used during the
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* resolution of integer expressions.
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*
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*****************************************************************************/
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static DT_FIELD *
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DtLookupLabel (
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char *Name)
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{
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DT_FIELD *LabelField;
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/* Skip a leading $ */
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if (*Name == '$')
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{
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Name++;
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}
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/* Search global list */
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LabelField = Gbl_LabelList;
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while (LabelField)
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{
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if (!ACPI_STRCMP (Name, LabelField->Value))
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{
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return (LabelField);
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}
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LabelField = LabelField->NextLabel;
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}
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return (NULL);
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}
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