%{ /****************************************************************************** * * Module Name: dtparser.y - Bison input file for table compiler parser * *****************************************************************************/ /* * Copyright (C) 2000 - 2014, Intel Corp. * All rights reserved. * * 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. * * Alternatively, this software may be distributed under the terms of the * GNU General Public License ("GPL") version 2 as published by the Free * Software Foundation. * * NO WARRANTY * 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 MERCHANTIBILITY AND FITNESS FOR * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT * HOLDERS OR CONTRIBUTORS BE LIABLE FOR 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 DAMAGES. */ #include #include #define _COMPONENT DT_COMPILER ACPI_MODULE_NAME ("dtparser") int DtParserlex (void); int DtParserparse (void); void DtParsererror (char const *msg); extern char *DtParsertext; extern DT_FIELD *Gbl_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 EXPOP_EOF %token EXPOP_NEW_LINE %token EXPOP_NUMBER %token EXPOP_HEX_NUMBER %token EXPOP_DECIMAL_NUMBER %token EXPOP_LABEL %token EXPOP_PAREN_OPEN %token EXPOP_PAREN_CLOSE %left EXPOP_LOGICAL_OR %left EXPOP_LOGICAL_AND %left EXPOP_OR %left EXPOP_XOR %left EXPOP_AND %left EXPOP_EQUAL EXPOP_NOT_EQUAL %left EXPOP_GREATER EXPOP_LESS EXPOP_GREATER_EQUAL EXPOP_LESS_EQUAL %left EXPOP_SHIFT_RIGHT EXPOP_SHIFT_LEFT %left EXPOP_ADD EXPOP_SUBTRACT %left EXPOP_MULTIPLY EXPOP_DIVIDE EXPOP_MODULO %right EXPOP_ONES_COMPLIMENT EXPOP_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 EXPOP_NEW_LINE { DtParserResult=$1; return 0; } /* End of line (newline) */ | Expression EXPOP_EOF { DtParserResult=$1; return 0; } /* End of string (0) */ ; Expression /* Unary operators */ : EXPOP_LOGICAL_NOT Expression { $$ = DtDoOperator ($2, EXPOP_LOGICAL_NOT, $2);} | EXPOP_ONES_COMPLIMENT Expression { $$ = DtDoOperator ($2, EXPOP_ONES_COMPLIMENT, $2);} /* Binary operators */ | Expression EXPOP_MULTIPLY Expression { $$ = DtDoOperator ($1, EXPOP_MULTIPLY, $3);} | Expression EXPOP_DIVIDE Expression { $$ = DtDoOperator ($1, EXPOP_DIVIDE, $3);} | Expression EXPOP_MODULO Expression { $$ = DtDoOperator ($1, EXPOP_MODULO, $3);} | Expression EXPOP_ADD Expression { $$ = DtDoOperator ($1, EXPOP_ADD, $3);} | Expression EXPOP_SUBTRACT Expression { $$ = DtDoOperator ($1, EXPOP_SUBTRACT, $3);} | Expression EXPOP_SHIFT_RIGHT Expression { $$ = DtDoOperator ($1, EXPOP_SHIFT_RIGHT, $3);} | Expression EXPOP_SHIFT_LEFT Expression { $$ = DtDoOperator ($1, EXPOP_SHIFT_LEFT, $3);} | Expression EXPOP_GREATER Expression { $$ = DtDoOperator ($1, EXPOP_GREATER, $3);} | Expression EXPOP_LESS Expression { $$ = DtDoOperator ($1, EXPOP_LESS, $3);} | Expression EXPOP_GREATER_EQUAL Expression { $$ = DtDoOperator ($1, EXPOP_GREATER_EQUAL, $3);} | Expression EXPOP_LESS_EQUAL Expression { $$ = DtDoOperator ($1, EXPOP_LESS_EQUAL, $3);} | Expression EXPOP_EQUAL Expression { $$ = DtDoOperator ($1, EXPOP_EQUAL, $3);} | Expression EXPOP_NOT_EQUAL Expression { $$ = DtDoOperator ($1, EXPOP_NOT_EQUAL, $3);} | Expression EXPOP_AND Expression { $$ = DtDoOperator ($1, EXPOP_AND, $3);} | Expression EXPOP_XOR Expression { $$ = DtDoOperator ($1, EXPOP_XOR, $3);} | Expression EXPOP_OR Expression { $$ = DtDoOperator ($1, EXPOP_OR, $3);} | Expression EXPOP_LOGICAL_AND Expression { $$ = DtDoOperator ($1, EXPOP_LOGICAL_AND, $3);} | Expression EXPOP_LOGICAL_OR Expression { $$ = DtDoOperator ($1, EXPOP_LOGICAL_OR, $3);} /* Parentheses: '(' Expression ')' */ | EXPOP_PAREN_OPEN Expression EXPOP_PAREN_CLOSE { $$ = $2;} /* Label references (prefixed with $) */ | EXPOP_LABEL { $$ = DtResolveLabel (DtParsertext);} /* Default base for a non-prefixed integer is 16 */ | EXPOP_NUMBER { UtStrtoul64 (DtParsertext, 16, &$$);} /* Standard hex number (0x1234) */ | EXPOP_HEX_NUMBER { UtStrtoul64 (DtParsertext, 16, &$$);} /* TBD: Decimal number with prefix (0d1234) - Not supported by UtStrtoul64 at this time */ | EXPOP_DECIMAL_NUMBER { UtStrtoul64 (DtParsertext, 10, &$$);} ; %% /*! [End] no source code translation !*/ /* * Local support functions, including parser entry point */ #define PR_FIRST_PARSE_OPCODE EXPOP_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, Gbl_CurrentField, (char *) Message); } /****************************************************************************** * * FUNCTION: DtGetOpName * * PARAMETERS: ParseOpcode - Parser token (EXPOP_*) * * 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 (EXPOP_) */ 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, Gbl_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); }