278 lines
9.8 KiB
Plaintext
278 lines
9.8 KiB
Plaintext
%{
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/******************************************************************************
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*
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* Module Name: dtparser.y - Bison input file for table compiler parser
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*
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*****************************************************************************/
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/*
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* Copyright (C) 2000 - 2015, Intel Corp.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer,
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* without modification.
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* 2. Redistributions in binary form must reproduce at minimum a disclaimer
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* substantially similar to the "NO WARRANTY" disclaimer below
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* ("Disclaimer") and any redistribution must be conditioned upon
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* including a substantially similar Disclaimer requirement for further
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* binary redistribution.
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* 3. Neither the names of the above-listed copyright holders nor the names
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* of any contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* NO WARRANTY
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGES.
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*/
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#include "aslcompiler.h"
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#include "dtcompiler.h"
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#define _COMPONENT DT_COMPILER
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ACPI_MODULE_NAME ("dtparser")
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int DtParserlex (void);
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int DtParserparse (void);
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void DtParsererror (char const *msg);
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extern char *DtParsertext;
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extern DT_FIELD *Gbl_CurrentField;
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UINT64 DtParserResult; /* Expression return value */
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/* Bison/yacc configuration */
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#define yytname DtParsername
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#define YYDEBUG 1 /* Enable debug output */
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#define YYERROR_VERBOSE 1 /* Verbose error messages */
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#define YYFLAG -32768
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/* Define YYMALLOC/YYFREE to prevent redefinition errors */
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#define YYMALLOC malloc
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#define YYFREE free
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%}
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%union
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{
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UINT64 value;
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UINT32 op;
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}
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/*! [Begin] no source code translation */
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%type <value> Expression
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%token <op> EXPOP_EOF
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%token <op> EXPOP_NEW_LINE
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%token <op> EXPOP_NUMBER
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%token <op> EXPOP_HEX_NUMBER
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%token <op> EXPOP_DECIMAL_NUMBER
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%token <op> EXPOP_LABEL
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%token <op> EXPOP_PAREN_OPEN
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%token <op> EXPOP_PAREN_CLOSE
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%left <op> EXPOP_LOGICAL_OR
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%left <op> EXPOP_LOGICAL_AND
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%left <op> EXPOP_OR
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%left <op> EXPOP_XOR
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%left <op> EXPOP_AND
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%left <op> EXPOP_EQUAL EXPOP_NOT_EQUAL
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%left <op> EXPOP_GREATER EXPOP_LESS EXPOP_GREATER_EQUAL EXPOP_LESS_EQUAL
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%left <op> EXPOP_SHIFT_RIGHT EXPOP_SHIFT_LEFT
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%left <op> EXPOP_ADD EXPOP_SUBTRACT
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%left <op> EXPOP_MULTIPLY EXPOP_DIVIDE EXPOP_MODULO
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%right <op> EXPOP_ONES_COMPLIMENT EXPOP_LOGICAL_NOT
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%%
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/*
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* Operator precedence rules (from K&R)
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*
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* 1) ( )
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* 2) ! ~ (unary operators that are supported here)
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* 3) * / %
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* 4) + -
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* 5) >> <<
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* 6) < > <= >=
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* 7) == !=
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* 8) &
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* 9) ^
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* 10) |
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* 11) &&
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* 12) ||
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*/
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Value
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: Expression EXPOP_NEW_LINE { DtParserResult=$1; return 0; } /* End of line (newline) */
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| Expression EXPOP_EOF { DtParserResult=$1; return 0; } /* End of string (0) */
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;
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Expression
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/* Unary operators */
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: EXPOP_LOGICAL_NOT Expression { $$ = DtDoOperator ($2, EXPOP_LOGICAL_NOT, $2);}
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| EXPOP_ONES_COMPLIMENT Expression { $$ = DtDoOperator ($2, EXPOP_ONES_COMPLIMENT, $2);}
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/* Binary operators */
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| Expression EXPOP_MULTIPLY Expression { $$ = DtDoOperator ($1, EXPOP_MULTIPLY, $3);}
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| Expression EXPOP_DIVIDE Expression { $$ = DtDoOperator ($1, EXPOP_DIVIDE, $3);}
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| Expression EXPOP_MODULO Expression { $$ = DtDoOperator ($1, EXPOP_MODULO, $3);}
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| Expression EXPOP_ADD Expression { $$ = DtDoOperator ($1, EXPOP_ADD, $3);}
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| Expression EXPOP_SUBTRACT Expression { $$ = DtDoOperator ($1, EXPOP_SUBTRACT, $3);}
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| Expression EXPOP_SHIFT_RIGHT Expression { $$ = DtDoOperator ($1, EXPOP_SHIFT_RIGHT, $3);}
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| Expression EXPOP_SHIFT_LEFT Expression { $$ = DtDoOperator ($1, EXPOP_SHIFT_LEFT, $3);}
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| Expression EXPOP_GREATER Expression { $$ = DtDoOperator ($1, EXPOP_GREATER, $3);}
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| Expression EXPOP_LESS Expression { $$ = DtDoOperator ($1, EXPOP_LESS, $3);}
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| Expression EXPOP_GREATER_EQUAL Expression { $$ = DtDoOperator ($1, EXPOP_GREATER_EQUAL, $3);}
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| Expression EXPOP_LESS_EQUAL Expression { $$ = DtDoOperator ($1, EXPOP_LESS_EQUAL, $3);}
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| Expression EXPOP_EQUAL Expression { $$ = DtDoOperator ($1, EXPOP_EQUAL, $3);}
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| Expression EXPOP_NOT_EQUAL Expression { $$ = DtDoOperator ($1, EXPOP_NOT_EQUAL, $3);}
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| Expression EXPOP_AND Expression { $$ = DtDoOperator ($1, EXPOP_AND, $3);}
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| Expression EXPOP_XOR Expression { $$ = DtDoOperator ($1, EXPOP_XOR, $3);}
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| Expression EXPOP_OR Expression { $$ = DtDoOperator ($1, EXPOP_OR, $3);}
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| Expression EXPOP_LOGICAL_AND Expression { $$ = DtDoOperator ($1, EXPOP_LOGICAL_AND, $3);}
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| Expression EXPOP_LOGICAL_OR Expression { $$ = DtDoOperator ($1, EXPOP_LOGICAL_OR, $3);}
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/* Parentheses: '(' Expression ')' */
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| EXPOP_PAREN_OPEN Expression
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EXPOP_PAREN_CLOSE { $$ = $2;}
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/* Label references (prefixed with $) */
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| EXPOP_LABEL { $$ = DtResolveLabel (DtParsertext);}
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/* Default base for a non-prefixed integer is 16 */
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| EXPOP_NUMBER { UtStrtoul64 (DtParsertext, 16, &$$);}
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/* Standard hex number (0x1234) */
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| EXPOP_HEX_NUMBER { UtStrtoul64 (DtParsertext, 16, &$$);}
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/* TBD: Decimal number with prefix (0d1234) - Not supported by UtStrtoul64 at this time */
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| EXPOP_DECIMAL_NUMBER { UtStrtoul64 (DtParsertext, 10, &$$);}
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;
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%%
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/*! [End] no source code translation !*/
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/*
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* Local support functions, including parser entry point
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*/
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#define PR_FIRST_PARSE_OPCODE EXPOP_EOF
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#define PR_YYTNAME_START 3
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/******************************************************************************
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*
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* FUNCTION: DtParsererror
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*
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* PARAMETERS: Message - Parser-generated error message
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*
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* RETURN: None
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*
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* DESCRIPTION: Handler for parser errors
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*
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*****************************************************************************/
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void
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DtParsererror (
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char const *Message)
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{
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DtError (ASL_ERROR, ASL_MSG_SYNTAX,
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Gbl_CurrentField, (char *) Message);
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}
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/******************************************************************************
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*
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* FUNCTION: DtGetOpName
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*
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* PARAMETERS: ParseOpcode - Parser token (EXPOP_*)
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*
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* RETURN: Pointer to the opcode name
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*
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* DESCRIPTION: Get the ascii name of the parse opcode for debug output
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*
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*****************************************************************************/
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char *
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DtGetOpName (
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UINT32 ParseOpcode)
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{
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#ifdef ASL_YYTNAME_START
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/*
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* First entries (PR_YYTNAME_START) in yytname are special reserved names.
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* Ignore first 6 characters of name (EXPOP_)
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*/
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return ((char *) yytname
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[(ParseOpcode - PR_FIRST_PARSE_OPCODE) + PR_YYTNAME_START] + 6);
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#else
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return ("[Unknown parser generator]");
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#endif
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}
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/******************************************************************************
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*
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* FUNCTION: DtEvaluateExpression
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*
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* PARAMETERS: ExprString - Expression to be evaluated. Must be
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* terminated by either a newline or a NUL
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* string terminator
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*
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* RETURN: 64-bit value for the expression
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*
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* DESCRIPTION: Main entry point for the DT expression parser
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*
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*****************************************************************************/
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UINT64
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DtEvaluateExpression (
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char *ExprString)
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{
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DbgPrint (ASL_DEBUG_OUTPUT,
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"**** Input expression: %s (Base 16)\n", ExprString);
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/* Point lexer to the input string */
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if (DtInitLexer (ExprString))
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{
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DtError (ASL_ERROR, ASL_MSG_COMPILER_INTERNAL,
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Gbl_CurrentField, "Could not initialize lexer");
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return (0);
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}
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/* Parse/Evaluate the input string (value returned in DtParserResult) */
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DtParserparse ();
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DtTerminateLexer ();
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DbgPrint (ASL_DEBUG_OUTPUT,
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"**** Parser returned value: %u (%8.8X%8.8X)\n",
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(UINT32) DtParserResult, ACPI_FORMAT_UINT64 (DtParserResult));
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return (DtParserResult);
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}
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