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Diffstat (limited to 'source/compiler/prparser.y')
| -rw-r--r-- | source/compiler/prparser.y | 284 |
1 files changed, 284 insertions, 0 deletions
diff --git a/source/compiler/prparser.y b/source/compiler/prparser.y new file mode 100644 index 0000000..e1bbb40 --- /dev/null +++ b/source/compiler/prparser.y @@ -0,0 +1,284 @@ +%{ +/****************************************************************************** + * + * Module Name: prparser.y - Bison input file for preprocessor parser + * + *****************************************************************************/ + +/* + * Copyright (C) 2000 - 2012, 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 "aslcompiler.h" +#include "dtcompiler.h" + +#define _COMPONENT ASL_PREPROCESSOR + ACPI_MODULE_NAME ("prparser") + +int PrParserlex (void); +int PrParserparse (void); +void PrParsererror (char const *msg); +extern char *PrParsertext; + +UINT64 PrParserResult; /* Expression return value */ + +/* Bison/yacc configuration */ + +#define yytname PrParsername +#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; + char *str; +} + +/*! [Begin] no source code translation */ + +%type <value> Expression + +%token <op> EXPOP_EOF +%token <op> EXPOP_NEW_LINE +%token <op> EXPOP_NUMBER +%token <op> EXPOP_HEX_NUMBER +%token <op> EXPOP_RESERVED1 +%token <op> EXPOP_RESERVED2 +%token <op> EXPOP_PAREN_OPEN +%token <op> EXPOP_PAREN_CLOSE + +%left <op> EXPOP_LOGICAL_OR +%left <op> EXPOP_LOGICAL_AND +%left <op> EXPOP_OR +%left <op> EXPOP_XOR +%left <op> EXPOP_AND +%left <op> EXPOP_EQUAL EXPOP_NOT_EQUAL +%left <op> EXPOP_GREATER EXPOP_LESS EXPOP_GREATER_EQUAL EXPOP_LESS_EQUAL +%left <op> EXPOP_SHIFT_RIGHT EXPOP_SHIFT_LEFT +%left <op> EXPOP_ADD EXPOP_SUBTRACT +%left <op> EXPOP_MULTIPLY EXPOP_DIVIDE EXPOP_MODULO +%right <op> EXPOP_ONES_COMPLIMENT EXPOP_LOGICAL_NOT + +/* Tokens above must be kept in synch with dtparser.y */ + +%token <op> EXPOP_DEFINE +%token <op> EXPOP_IDENTIFIER + +%% + +/* + * Operator precedence rules (from K&R) + * + * 1) ( ) + * 2) ! ~ (unary operators that are supported here) + * 3) * / % + * 4) + - + * 5) >> << + * 6) < > <= >= + * 7) == != + * 8) & + * 9) ^ + * 10) | + * 11) && + * 12) || + */ + +/*! [End] no source code translation !*/ + +Value + : Expression EXPOP_NEW_LINE { PrParserResult=$1; return 0; } /* End of line (newline) */ + | Expression EXPOP_EOF { PrParserResult=$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 { $$ = $2;} + + /* #if defined (ID) or #if defined ID */ + + | EXPOP_DEFINE EXPOP_PAREN_OPEN EXPOP_IDENTIFIER + EXPOP_PAREN_CLOSE { $$ = PrIsDefined (PrParserlval.str);} + + | EXPOP_DEFINE EXPOP_IDENTIFIER { $$ = PrIsDefined (PrParserlval.str);} + + | EXPOP_IDENTIFIER { $$ = PrResolveDefine (PrParserlval.str);} + + /* Default base for a non-prefixed integer is 10 */ + + | EXPOP_NUMBER { UtStrtoul64 (PrParsertext, 10, &$$);} + + /* Standard hex number (0x1234) */ + + | EXPOP_HEX_NUMBER { UtStrtoul64 (PrParsertext, 16, &$$);} + ; +%% + +/* + * Local support functions, including parser entry point + */ +#define PR_FIRST_PARSE_OPCODE EXPOP_EOF +#define PR_YYTNAME_START 3 + + +/****************************************************************************** + * + * FUNCTION: PrParsererror + * + * PARAMETERS: Message - Parser-generated error message + * + * RETURN: None + * + * DESCRIPTION: Handler for parser errors + * + *****************************************************************************/ + +void +PrParsererror ( + char const *Message) +{ + DtError (ASL_ERROR, ASL_MSG_SYNTAX, + NULL, (char *) Message); +} + + +/****************************************************************************** + * + * FUNCTION: PrGetOpName + * + * PARAMETERS: ParseOpcode - Parser token (EXPOP_*) + * + * RETURN: Pointer to the opcode name + * + * DESCRIPTION: Get the ascii name of the parse opcode for debug output + * + *****************************************************************************/ + +char * +PrGetOpName ( + 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: PrEvaluateExpression + * + * 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 +PrEvaluateExpression ( + char *ExprString) +{ + + DbgPrint (ASL_DEBUG_OUTPUT, + "**** Input expression: %s\n", ExprString); + + /* Point lexer to the input string */ + + if (PrInitLexer (ExprString)) + { + DtError (ASL_ERROR, ASL_MSG_COMPILER_INTERNAL, + NULL, "Could not initialize lexer"); + return (0); + } + + /* Parse/Evaluate the input string (value returned in PrParserResult) */ + + PrParserparse (); + PrTerminateLexer (); + + DbgPrint (ASL_DEBUG_OUTPUT, + "**** Parser returned value: %u (%8.8X%8.8X)\n", + (UINT32) PrParserResult, ACPI_FORMAT_UINT64 (PrParserResult)); + + return (PrParserResult); +} |
