dtparser.y revision 1.1
1 %{ 2 /****************************************************************************** 3 * 4 * Module Name: dtparser.y - Bison input file for table compiler parser 5 * 6 *****************************************************************************/ 7 8 /* 9 * Copyright (C) 2000 - 2011, Intel Corp. 10 * All rights reserved. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions, and the following disclaimer, 17 * without modification. 18 * 2. Redistributions in binary form must reproduce at minimum a disclaimer 19 * substantially similar to the "NO WARRANTY" disclaimer below 20 * ("Disclaimer") and any redistribution must be conditioned upon 21 * including a substantially similar Disclaimer requirement for further 22 * binary redistribution. 23 * 3. Neither the names of the above-listed copyright holders nor the names 24 * of any contributors may be used to endorse or promote products derived 25 * from this software without specific prior written permission. 26 * 27 * Alternatively, this software may be distributed under the terms of the 28 * GNU General Public License ("GPL") version 2 as published by the Free 29 * Software Foundation. 30 * 31 * NO WARRANTY 32 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 33 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 34 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR 35 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 36 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 37 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 38 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 39 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 40 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 41 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 42 * POSSIBILITY OF SUCH DAMAGES. 43 */ 44 45 #include "aslcompiler.h" 46 #include "dtcompiler.h" 47 48 #define _COMPONENT DT_COMPILER 49 ACPI_MODULE_NAME ("dtparser") 50 51 int DtParserlex (void); 52 int DtParserparse (void); 53 void DtParsererror (char const *msg); 54 extern char *DtParsertext; 55 extern DT_FIELD *Gbl_CurrentField; 56 57 UINT64 DtParserResult; /* Expression return value */ 58 59 /* Bison/yacc configuration */ 60 61 #define yytname DtParsername 62 #define YYDEBUG 1 /* Enable debug output */ 63 #define YYERROR_VERBOSE 1 /* Verbose error messages */ 64 #define YYFLAG -32768 65 66 %} 67 68 %union 69 { 70 UINT64 value; 71 UINT32 op; 72 } 73 74 /*! [Begin] no source code translation */ 75 76 %type <value> Expression 77 78 %token <op> EXPOP_EOF 79 %token <op> EXPOP_NEW_LINE 80 %token <op> EXPOP_NUMBER 81 %token <op> EXPOP_HEX_NUMBER 82 %token <op> EXPOP_DECIMAL_NUMBER 83 %token <op> EXPOP_LABEL 84 %token <op> EXPOP_PAREN_OPEN 85 %token <op> EXPOP_PAREN_CLOSE 86 87 %left <op> EXPOP_LOGICAL_OR 88 %left <op> EXPOP_LOGICAL_AND 89 %left <op> EXPOP_OR 90 %left <op> EXPOP_XOR 91 %left <op> EXPOP_AND 92 %left <op> EXPOP_EQUAL EXPOP_NOT_EQUAL 93 %left <op> EXPOP_GREATER EXPOP_LESS EXPOP_GREATER_EQUAL EXPOP_LESS_EQUAL 94 %left <op> EXPOP_SHIFT_RIGHT EXPOP_SHIFT_LEFT 95 %left <op> EXPOP_ADD EXPOP_SUBTRACT 96 %left <op> EXPOP_MULTIPLY EXPOP_DIVIDE EXPOP_MODULO 97 %right <op> EXPOP_ONES_COMPLIMENT EXPOP_LOGICAL_NOT 98 99 %% 100 101 /* 102 * Operator precedence rules (from K&R) 103 * 104 * 1) ( ) 105 * 2) ! ~ (unary operators that are supported here) 106 * 3) * / % 107 * 4) + - 108 * 5) >> << 109 * 6) < > <= >= 110 * 7) == != 111 * 8) & 112 * 9) ^ 113 * 10) | 114 * 11) && 115 * 12) || 116 */ 117 Value 118 : Expression EXPOP_NEW_LINE { DtParserResult=$1; return 0; } /* End of line (newline) */ 119 | Expression EXPOP_EOF { DtParserResult=$1; return 0; } /* End of string (0) */ 120 ; 121 122 Expression 123 124 /* Unary operators */ 125 126 : EXPOP_LOGICAL_NOT Expression { $$ = DtDoOperator ($2, EXPOP_LOGICAL_NOT, $2);} 127 | EXPOP_ONES_COMPLIMENT Expression { $$ = DtDoOperator ($2, EXPOP_ONES_COMPLIMENT, $2);} 128 129 /* Binary operators */ 130 131 | Expression EXPOP_MULTIPLY Expression { $$ = DtDoOperator ($1, EXPOP_MULTIPLY, $3);} 132 | Expression EXPOP_DIVIDE Expression { $$ = DtDoOperator ($1, EXPOP_DIVIDE, $3);} 133 | Expression EXPOP_MODULO Expression { $$ = DtDoOperator ($1, EXPOP_MODULO, $3);} 134 | Expression EXPOP_ADD Expression { $$ = DtDoOperator ($1, EXPOP_ADD, $3);} 135 | Expression EXPOP_SUBTRACT Expression { $$ = DtDoOperator ($1, EXPOP_SUBTRACT, $3);} 136 | Expression EXPOP_SHIFT_RIGHT Expression { $$ = DtDoOperator ($1, EXPOP_SHIFT_RIGHT, $3);} 137 | Expression EXPOP_SHIFT_LEFT Expression { $$ = DtDoOperator ($1, EXPOP_SHIFT_LEFT, $3);} 138 | Expression EXPOP_GREATER Expression { $$ = DtDoOperator ($1, EXPOP_GREATER, $3);} 139 | Expression EXPOP_LESS Expression { $$ = DtDoOperator ($1, EXPOP_LESS, $3);} 140 | Expression EXPOP_GREATER_EQUAL Expression { $$ = DtDoOperator ($1, EXPOP_GREATER_EQUAL, $3);} 141 | Expression EXPOP_LESS_EQUAL Expression { $$ = DtDoOperator ($1, EXPOP_LESS_EQUAL, $3);} 142 | Expression EXPOP_EQUAL Expression { $$ = DtDoOperator ($1, EXPOP_EQUAL, $3);} 143 | Expression EXPOP_NOT_EQUAL Expression { $$ = DtDoOperator ($1, EXPOP_NOT_EQUAL, $3);} 144 | Expression EXPOP_AND Expression { $$ = DtDoOperator ($1, EXPOP_AND, $3);} 145 | Expression EXPOP_XOR Expression { $$ = DtDoOperator ($1, EXPOP_XOR, $3);} 146 | Expression EXPOP_OR Expression { $$ = DtDoOperator ($1, EXPOP_OR, $3);} 147 | Expression EXPOP_LOGICAL_AND Expression { $$ = DtDoOperator ($1, EXPOP_LOGICAL_AND, $3);} 148 | Expression EXPOP_LOGICAL_OR Expression { $$ = DtDoOperator ($1, EXPOP_LOGICAL_OR, $3);} 149 150 /* Parentheses: '(' Expression ')' */ 151 152 | EXPOP_PAREN_OPEN Expression 153 EXPOP_PAREN_CLOSE { $$ = $2;} 154 155 /* Label references (prefixed with $) */ 156 157 | EXPOP_LABEL { $$ = DtResolveLabel (DtParsertext);} 158 159 /* Default base for a non-prefixed integer is 16 */ 160 161 | EXPOP_NUMBER { UtStrtoul64 (DtParsertext, 16, &$$);} 162 163 /* Standard hex number (0x1234) */ 164 165 | EXPOP_HEX_NUMBER { UtStrtoul64 (DtParsertext, 16, &$$);} 166 167 /* TBD: Decimal number with prefix (0d1234) - Not supported by UtStrtoul64 at this time */ 168 169 | EXPOP_DECIMAL_NUMBER { UtStrtoul64 (DtParsertext, 10, &$$);} 170 ; 171 %% 172 173 /*! [End] no source code translation !*/ 174 175 /* 176 * Local support functions, including parser entry point 177 */ 178 #define PR_FIRST_PARSE_OPCODE EXPOP_EOF 179 #define PR_YYTNAME_START 3 180 181 182 /****************************************************************************** 183 * 184 * FUNCTION: DtParsererror 185 * 186 * PARAMETERS: Message - Parser-generated error message 187 * 188 * RETURN: None 189 * 190 * DESCRIPTION: Handler for parser errors 191 * 192 *****************************************************************************/ 193 194 void 195 DtParsererror ( 196 char const *Message) 197 { 198 DtError (ASL_ERROR, ASL_MSG_SYNTAX, 199 Gbl_CurrentField, (char *) Message); 200 } 201 202 203 /****************************************************************************** 204 * 205 * FUNCTION: DtGetOpName 206 * 207 * PARAMETERS: ParseOpcode - Parser token (EXPOP_*) 208 * 209 * RETURN: Pointer to the opcode name 210 * 211 * DESCRIPTION: Get the ascii name of the parse opcode for debug output 212 * 213 *****************************************************************************/ 214 215 char * 216 DtGetOpName ( 217 UINT32 ParseOpcode) 218 { 219 #ifdef ASL_YYTNAME_START 220 /* 221 * First entries (PR_YYTNAME_START) in yytname are special reserved names. 222 * Ignore first 6 characters of name (EXPOP_) 223 */ 224 return ((char *) yytname 225 [(ParseOpcode - PR_FIRST_PARSE_OPCODE) + PR_YYTNAME_START] + 6); 226 #else 227 return ("[Unknown parser generator]"); 228 #endif 229 } 230 231 232 /****************************************************************************** 233 * 234 * FUNCTION: DtEvaluateExpression 235 * 236 * PARAMETERS: ExprString - Expression to be evaluated. Must be 237 * terminated by either a newline or a NUL 238 * string terminator 239 * 240 * RETURN: 64-bit value for the expression 241 * 242 * DESCRIPTION: Main entry point for the DT expression parser 243 * 244 *****************************************************************************/ 245 246 UINT64 247 DtEvaluateExpression ( 248 char *ExprString) 249 { 250 251 DbgPrint (ASL_DEBUG_OUTPUT, 252 "**** Input expression: %s (Base 16)\n", ExprString); 253 254 /* Point lexer to the input string */ 255 256 if (DtInitLexer (ExprString)) 257 { 258 DtError (ASL_ERROR, ASL_MSG_COMPILER_INTERNAL, 259 Gbl_CurrentField, "Could not initialize lexer"); 260 return (0); 261 } 262 263 /* Parse/Evaluate the input string (value returned in DtParserResult) */ 264 265 DtParserparse (); 266 DtTerminateLexer (); 267 268 DbgPrint (ASL_DEBUG_OUTPUT, 269 "**** Parser returned value: %u (%8.8X%8.8X)\n", 270 (UINT32) DtParserResult, ACPI_FORMAT_UINT64 (DtParserResult)); 271 272 return (DtParserResult); 273 } 274
Indexes created Tue Sep 30 20:09:53 GMT 2025