/****************************************************************************** * * Module Name: dtexpress.c - Support for integer expressions and labels * *****************************************************************************/ /****************************************************************************** * * 1. Copyright Notice * * Some or all of this work - Copyright (c) 1999 - 2018, Intel Corp. * All rights reserved. * * 2. License * * 2.1. This is your license from Intel Corp. under its intellectual property * rights. You may have additional license terms from the party that provided * you this software, covering your right to use that party's intellectual * property rights. * * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a * copy of the source code appearing in this file ("Covered Code") an * irrevocable, perpetual, worldwide license under Intel's copyrights in the * base code distributed originally by Intel ("Original Intel Code") to copy, * make derivatives, distribute, use and display any portion of the Covered * Code in any form, with the right to sublicense such rights; and * * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent * license (with the right to sublicense), under only those claims of Intel * patents that are infringed by the Original Intel Code, to make, use, sell, * offer to sell, and import the Covered Code and derivative works thereof * solely to the minimum extent necessary to exercise the above copyright * license, and in no event shall the patent license extend to any additions * to or modifications of the Original Intel Code. No other license or right * is granted directly or by implication, estoppel or otherwise; * * The above copyright and patent license is granted only if the following * conditions are met: * * 3. Conditions * * 3.1. Redistribution of Source with Rights to Further Distribute Source. * Redistribution of source code of any substantial portion of the Covered * Code or modification with rights to further distribute source must include * the above Copyright Notice, the above License, this list of Conditions, * and the following Disclaimer and Export Compliance provision. In addition, * Licensee must cause all Covered Code to which Licensee contributes to * contain a file documenting the changes Licensee made to create that Covered * Code and the date of any change. Licensee must include in that file the * documentation of any changes made by any predecessor Licensee. Licensee * must include a prominent statement that the modification is derived, * directly or indirectly, from Original Intel Code. * * 3.2. Redistribution of Source with no Rights to Further Distribute Source. * Redistribution of source code of any substantial portion of the Covered * Code or modification without rights to further distribute source must * include the following Disclaimer and Export Compliance provision in the * documentation and/or other materials provided with distribution. In * addition, Licensee may not authorize further sublicense of source of any * portion of the Covered Code, and must include terms to the effect that the * license from Licensee to its licensee is limited to the intellectual * property embodied in the software Licensee provides to its licensee, and * not to intellectual property embodied in modifications its licensee may * make. * * 3.3. Redistribution of Executable. Redistribution in executable form of any * substantial portion of the Covered Code or modification must reproduce the * above Copyright Notice, and the following Disclaimer and Export Compliance * provision in the documentation and/or other materials provided with the * distribution. * * 3.4. Intel retains all right, title, and interest in and to the Original * Intel Code. * * 3.5. Neither the name Intel nor any other trademark owned or controlled by * Intel shall be used in advertising or otherwise to promote the sale, use or * other dealings in products derived from or relating to the Covered Code * without prior written authorization from Intel. * * 4. Disclaimer and Export Compliance * * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A * PARTICULAR PURPOSE. * * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY * LIMITED REMEDY. * * 4.3. Licensee shall not export, either directly or indirectly, any of this * software or system incorporating such software without first obtaining any * required license or other approval from the U. S. Department of Commerce or * any other agency or department of the United States Government. In the * event Licensee exports any such software from the United States or * re-exports any such software from a foreign destination, Licensee shall * ensure that the distribution and export/re-export of the software is in * compliance with all laws, regulations, orders, or other restrictions of the * U.S. Export Administration Regulations. Licensee agrees that neither it nor * any of its subsidiaries will export/re-export any technical data, process, * software, or service, directly or indirectly, to any country for which the * United States government or any agency thereof requires an export license, * other governmental approval, or letter of assurance, without first obtaining * such license, approval or letter. * ***************************************************************************** * * Alternatively, you may choose to be licensed under the terms of the * following license: * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions, and the following disclaimer, * without modification. * 2. Redistributions in binary form must reproduce at minimum a disclaimer * substantially similar to the "NO WARRANTY" disclaimer below * ("Disclaimer") and any redistribution must be conditioned upon * including a substantially similar Disclaimer requirement for further * binary redistribution. * 3. Neither the names of the above-listed copyright holders nor the names * of any contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * * Alternatively, you may choose to be licensed under the terms of the * GNU General Public License ("GPL") version 2 as published by the Free * Software Foundation. * *****************************************************************************/ #include "aslcompiler.h" #include "dtparser.y.h" #define _COMPONENT DT_COMPILER ACPI_MODULE_NAME ("dtexpress") /* Local prototypes */ static void DtInsertLabelField ( DT_FIELD *Field); static DT_FIELD * DtLookupLabel ( char *Name); /* Global used for errors during parse and related functions */ DT_FIELD *Gbl_CurrentField; /****************************************************************************** * * FUNCTION: DtResolveIntegerExpression * * PARAMETERS: Field - Field object with Integer expression * ReturnValue - Where the integer is returned * * RETURN: Status, and the resolved 64-bit integer value * * DESCRIPTION: Resolve an integer expression to a single value. Supports * both integer constants and labels. * *****************************************************************************/ ACPI_STATUS DtResolveIntegerExpression ( DT_FIELD *Field, UINT64 *ReturnValue) { UINT64 Result; DbgPrint (ASL_DEBUG_OUTPUT, "Full Integer expression: %s\n", Field->Value); Gbl_CurrentField = Field; Result = DtEvaluateExpression (Field->Value); *ReturnValue = Result; return (AE_OK); } /****************************************************************************** * * FUNCTION: DtDoOperator * * PARAMETERS: LeftValue - First 64-bit operand * Operator - Parse token for the operator (EXPOP_*) * RightValue - Second 64-bit operand * * RETURN: 64-bit result of the requested operation * * DESCRIPTION: Perform the various 64-bit integer math functions * *****************************************************************************/ UINT64 DtDoOperator ( UINT64 LeftValue, UINT32 Operator, UINT64 RightValue) { UINT64 Result; /* Perform the requested operation */ switch (Operator) { case EXPOP_ONES_COMPLIMENT: Result = ~RightValue; break; case EXPOP_LOGICAL_NOT: Result = !RightValue; break; case EXPOP_MULTIPLY: Result = LeftValue * RightValue; break; case EXPOP_DIVIDE: if (!RightValue) { DtError (ASL_ERROR, ASL_MSG_DIVIDE_BY_ZERO, Gbl_CurrentField, NULL); return (0); } Result = LeftValue / RightValue; break; case EXPOP_MODULO: if (!RightValue) { DtError (ASL_ERROR, ASL_MSG_DIVIDE_BY_ZERO, Gbl_CurrentField, NULL); return (0); } Result = LeftValue % RightValue; break; case EXPOP_ADD: Result = LeftValue + RightValue; break; case EXPOP_SUBTRACT: Result = LeftValue - RightValue; break; case EXPOP_SHIFT_RIGHT: Result = LeftValue >> RightValue; break; case EXPOP_SHIFT_LEFT: Result = LeftValue << RightValue; break; case EXPOP_LESS: Result = LeftValue < RightValue; break; case EXPOP_GREATER: Result = LeftValue > RightValue; break; case EXPOP_LESS_EQUAL: Result = LeftValue <= RightValue; break; case EXPOP_GREATER_EQUAL: Result = LeftValue >= RightValue; break; case EXPOP_EQUAL: Result = LeftValue == RightValue; break; case EXPOP_NOT_EQUAL: Result = LeftValue != RightValue; break; case EXPOP_AND: Result = LeftValue & RightValue; break; case EXPOP_XOR: Result = LeftValue ^ RightValue; break; case EXPOP_OR: Result = LeftValue | RightValue; break; case EXPOP_LOGICAL_AND: Result = LeftValue && RightValue; break; case EXPOP_LOGICAL_OR: Result = LeftValue || RightValue; break; default: /* Unknown operator */ DtFatal (ASL_MSG_INVALID_EXPRESSION, Gbl_CurrentField, NULL); return (0); } DbgPrint (ASL_DEBUG_OUTPUT, "IntegerEval: (%8.8X%8.8X %s %8.8X%8.8X) = %8.8X%8.8X\n", ACPI_FORMAT_UINT64 (LeftValue), DtGetOpName (Operator), ACPI_FORMAT_UINT64 (RightValue), ACPI_FORMAT_UINT64 (Result)); return (Result); } /****************************************************************************** * * FUNCTION: DtResolveLabel * * PARAMETERS: LabelString - Contains the label * * RETURN: Table offset associated with the label * * DESCRIPTION: Lookup a lable and return its value. * *****************************************************************************/ UINT64 DtResolveLabel ( char *LabelString) { DT_FIELD *LabelField; DbgPrint (ASL_DEBUG_OUTPUT, "Resolve Label: %s\n", LabelString); /* Resolve a label reference to an integer (table offset) */ if (*LabelString != '$') { return (0); } LabelField = DtLookupLabel (LabelString); if (!LabelField) { DtError (ASL_ERROR, ASL_MSG_UNKNOWN_LABEL, Gbl_CurrentField, LabelString); return (0); } /* All we need from the label is the offset in the table */ DbgPrint (ASL_DEBUG_OUTPUT, "Resolved Label: 0x%8.8X\n", LabelField->TableOffset); return (LabelField->TableOffset); } /****************************************************************************** * * FUNCTION: DtDetectAllLabels * * PARAMETERS: FieldList - Field object at start of generic list * * RETURN: None * * DESCRIPTION: Detect all labels in a list of "generic" opcodes (such as * a UEFI table.) and insert them into the global label list. * *****************************************************************************/ void DtDetectAllLabels ( DT_FIELD *FieldList) { ACPI_DMTABLE_INFO *Info; DT_FIELD *GenericField; UINT32 TableOffset; TableOffset = Gbl_CurrentTableOffset; GenericField = FieldList; /* * Process all "Label:" fields within the parse tree. We need * to know the offsets for all labels before we can compile * the parse tree in order to handle forward references. Traverse * tree and get/set all field lengths of all operators in order to * determine the label offsets. */ while (GenericField) { Info = DtGetGenericTableInfo (GenericField->Name); if (Info) { /* Maintain table offsets */ GenericField->TableOffset = TableOffset; TableOffset += DtGetFieldLength (GenericField, Info); /* Insert all labels in the global label list */ if (Info->Opcode == ACPI_DMT_LABEL) { DtInsertLabelField (GenericField); } } GenericField = GenericField->Next; } } /****************************************************************************** * * FUNCTION: DtInsertLabelField * * PARAMETERS: Field - Field object with Label to be inserted * * RETURN: None * * DESCRIPTION: Insert a label field into the global label list * *****************************************************************************/ static void DtInsertLabelField ( DT_FIELD *Field) { DbgPrint (ASL_DEBUG_OUTPUT, "DtInsertLabelField: Found Label : %s at output table offset %X\n", Field->Value, Field->TableOffset); Field->NextLabel = Gbl_LabelList; Gbl_LabelList = Field; } /****************************************************************************** * * FUNCTION: DtLookupLabel * * PARAMETERS: Name - Label to be resolved * * RETURN: Field object associated with the label * * DESCRIPTION: Lookup a label in the global label list. Used during the * resolution of integer expressions. * *****************************************************************************/ static DT_FIELD * DtLookupLabel ( char *Name) { DT_FIELD *LabelField; /* Skip a leading $ */ if (*Name == '$') { Name++; } /* Search global list */ LabelField = Gbl_LabelList; while (LabelField) { if (!strcmp (Name, LabelField->Value)) { return (LabelField); } LabelField = LabelField->NextLabel; } return (NULL); }