%{
/******************************************************************************
*
* Module Name: dtparser.y - Bison input file for table compiler parser
*
*****************************************************************************/
/******************************************************************************
*
* 1. Copyright Notice
*
* Some or all of this work - Copyright (c) 1999 - 2021, 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"
#define _COMPONENT DT_COMPILER
ACPI_MODULE_NAME ("dtparser")
void * AslLocalAllocate (unsigned int Size);
/* Bison/yacc configuration */
#undef alloca
#define alloca AslLocalAllocate
int DtParserlex (void);
int DtParserparse (void);
void DtParsererror (char const *msg);
extern char *DtParsertext;
extern DT_FIELD *AslGbl_CurrentField;
UINT64 DtParserResult; /* Expression return value */
/* Bison/yacc configuration */
#define yytname DtParsername
#define YYDEBUG 1 /* Enable debug output */
#define YYERROR_VERBOSE 1 /* Verbose error messages */
#define YYFLAG -32768
/* Define YYMALLOC/YYFREE to prevent redefinition errors */
#define YYMALLOC malloc
#define YYFREE free
%}
%union
{
UINT64 value;
UINT32 op;
}
/*! [Begin] no source code translation */
%type Expression
%token OP_EXP_EOF
%token OP_EXP_NEW_LINE
%token OP_EXP_NUMBER
%token OP_EXP_HEX_NUMBER
%token OP_EXP_DECIMAL_NUMBER
%token OP_EXP_LABEL
%token OP_EXP_PAREN_OPEN
%token OP_EXP_PAREN_CLOSE
%left OP_EXP_LOGICAL_OR
%left OP_EXP_LOGICAL_AND
%left OP_EXP_OR
%left OP_EXP_XOR
%left OP_EXP_AND
%left OP_EXP_EQUAL OP_EXP_NOT_EQUAL
%left OP_EXP_GREATER OP_EXP_LESS OP_EXP_GREATER_EQUAL OP_EXP_LESS_EQUAL
%left OP_EXP_SHIFT_RIGHT OP_EXP_SHIFT_LEFT
%left OP_EXP_ADD OP_EXP_SUBTRACT
%left OP_EXP_MULTIPLY OP_EXP_DIVIDE OP_EXP_MODULO
%right OP_EXP_ONES_COMPLIMENT OP_EXP_LOGICAL_NOT
%%
/*
* Operator precedence rules (from K&R)
*
* 1) ( )
* 2) ! ~ (unary operators that are supported here)
* 3) * / %
* 4) + -
* 5) >> <<
* 6) < > <= >=
* 7) == !=
* 8) &
* 9) ^
* 10) |
* 11) &&
* 12) ||
*/
Value
: Expression OP_EXP_NEW_LINE { DtParserResult=$1; return 0; } /* End of line (newline) */
| Expression OP_EXP_EOF { DtParserResult=$1; return 0; } /* End of string (0) */
;
Expression
/* Unary operators */
: OP_EXP_LOGICAL_NOT Expression { $$ = DtDoOperator ($2, OP_EXP_LOGICAL_NOT, $2);}
| OP_EXP_ONES_COMPLIMENT Expression { $$ = DtDoOperator ($2, OP_EXP_ONES_COMPLIMENT, $2);}
/* Binary operators */
| Expression OP_EXP_MULTIPLY Expression { $$ = DtDoOperator ($1, OP_EXP_MULTIPLY, $3);}
| Expression OP_EXP_DIVIDE Expression { $$ = DtDoOperator ($1, OP_EXP_DIVIDE, $3);}
| Expression OP_EXP_MODULO Expression { $$ = DtDoOperator ($1, OP_EXP_MODULO, $3);}
| Expression OP_EXP_ADD Expression { $$ = DtDoOperator ($1, OP_EXP_ADD, $3);}
| Expression OP_EXP_SUBTRACT Expression { $$ = DtDoOperator ($1, OP_EXP_SUBTRACT, $3);}
| Expression OP_EXP_SHIFT_RIGHT Expression { $$ = DtDoOperator ($1, OP_EXP_SHIFT_RIGHT, $3);}
| Expression OP_EXP_SHIFT_LEFT Expression { $$ = DtDoOperator ($1, OP_EXP_SHIFT_LEFT, $3);}
| Expression OP_EXP_GREATER Expression { $$ = DtDoOperator ($1, OP_EXP_GREATER, $3);}
| Expression OP_EXP_LESS Expression { $$ = DtDoOperator ($1, OP_EXP_LESS, $3);}
| Expression OP_EXP_GREATER_EQUAL Expression { $$ = DtDoOperator ($1, OP_EXP_GREATER_EQUAL, $3);}
| Expression OP_EXP_LESS_EQUAL Expression { $$ = DtDoOperator ($1, OP_EXP_LESS_EQUAL, $3);}
| Expression OP_EXP_EQUAL Expression { $$ = DtDoOperator ($1, OP_EXP_EQUAL, $3);}
| Expression OP_EXP_NOT_EQUAL Expression { $$ = DtDoOperator ($1, OP_EXP_NOT_EQUAL, $3);}
| Expression OP_EXP_AND Expression { $$ = DtDoOperator ($1, OP_EXP_AND, $3);}
| Expression OP_EXP_XOR Expression { $$ = DtDoOperator ($1, OP_EXP_XOR, $3);}
| Expression OP_EXP_OR Expression { $$ = DtDoOperator ($1, OP_EXP_OR, $3);}
| Expression OP_EXP_LOGICAL_AND Expression { $$ = DtDoOperator ($1, OP_EXP_LOGICAL_AND, $3);}
| Expression OP_EXP_LOGICAL_OR Expression { $$ = DtDoOperator ($1, OP_EXP_LOGICAL_OR, $3);}
/* Parentheses: '(' Expression ')' */
| OP_EXP_PAREN_OPEN Expression
OP_EXP_PAREN_CLOSE { $$ = $2;}
/* Label references (prefixed with $) */
| OP_EXP_LABEL { $$ = DtResolveLabel (DtParsertext);}
/*
* All constants for the data table compiler are in hex, whether a (optional) 0x
* prefix is present or not. For example, these two input strings are equivalent:
* 1234
* 0x1234
*/
/* Non-prefixed hex number */
| OP_EXP_NUMBER { $$ = DtDoConstant (DtParsertext);}
/* Standard hex number (0x1234) */
| OP_EXP_HEX_NUMBER { $$ = DtDoConstant (DtParsertext);}
/* Possible TBD: Decimal number with prefix (0d1234) - Not supported this time */
| OP_EXP_DECIMAL_NUMBER { $$ = DtDoConstant (DtParsertext);}
;
%%
/*! [End] no source code translation !*/
/*
* Local support functions, including parser entry point
*/
#define PR_FIRST_PARSE_OPCODE OP_EXP_EOF
#define PR_YYTNAME_START 3
/******************************************************************************
*
* FUNCTION: DtParsererror
*
* PARAMETERS: Message - Parser-generated error message
*
* RETURN: None
*
* DESCRIPTION: Handler for parser errors
*
*****************************************************************************/
void
DtParsererror (
char const *Message)
{
DtError (ASL_ERROR, ASL_MSG_SYNTAX,
AslGbl_CurrentField, (char *) Message);
}
/******************************************************************************
*
* FUNCTION: DtGetOpName
*
* PARAMETERS: ParseOpcode - Parser token (OP_EXP_*)
*
* RETURN: Pointer to the opcode name
*
* DESCRIPTION: Get the ascii name of the parse opcode for debug output
*
*****************************************************************************/
char *
DtGetOpName (
UINT32 ParseOpcode)
{
#ifdef ASL_YYTNAME_START
/*
* First entries (PR_YYTNAME_START) in yytname are special reserved names.
* Ignore first 6 characters of name (OP_EXP_)
*/
return ((char *) yytname
[(ParseOpcode - PR_FIRST_PARSE_OPCODE) + PR_YYTNAME_START] + 6);
#else
return ("[Unknown parser generator]");
#endif
}
/******************************************************************************
*
* FUNCTION: DtEvaluateExpression
*
* PARAMETERS: ExprString - Expression to be evaluated. Must be
* terminated by either a newline or a NUL
* string terminator
*
* RETURN: 64-bit value for the expression
*
* DESCRIPTION: Main entry point for the DT expression parser
*
*****************************************************************************/
UINT64
DtEvaluateExpression (
char *ExprString)
{
DbgPrint (ASL_DEBUG_OUTPUT,
"**** Input expression: %s (Base 16)\n", ExprString);
/* Point lexer to the input string */
if (DtInitLexer (ExprString))
{
DtError (ASL_ERROR, ASL_MSG_COMPILER_INTERNAL,
AslGbl_CurrentField, "Could not initialize lexer");
return (0);
}
/* Parse/Evaluate the input string (value returned in DtParserResult) */
DtParserparse ();
DtTerminateLexer ();
DbgPrint (ASL_DEBUG_OUTPUT,
"**** Parser returned value: %u (%8.8X%8.8X)\n",
(UINT32) DtParserResult, ACPI_FORMAT_UINT64 (DtParserResult));
return (DtParserResult);
}