prparser.y revision 1.2
1 %{ 2 /****************************************************************************** 3 * 4 * Module Name: prparser.y - Bison input file for preprocessor parser 5 * 6 *****************************************************************************/ 7 8 /* 9 * Copyright (C) 2000 - 2013, 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 ASL_PREPROCESSOR 49 ACPI_MODULE_NAME ("prparser") 50 51 int PrParserlex (void); 52 int PrParserparse (void); 53 void PrParsererror (char const *msg); 54 extern char *PrParsertext; 55 56 UINT64 PrParserResult; /* Expression return value */ 57 58 /* Bison/yacc configuration */ 59 60 #ifndef yytname 61 #define yytname PrParsername 62 #endif 63 #define YYDEBUG 1 /* Enable debug output */ 64 #define YYERROR_VERBOSE 1 /* Verbose error messages */ 65 #define YYFLAG -32768 66 67 /* Define YYMALLOC/YYFREE to prevent redefinition errors */ 68 69 #define YYMALLOC malloc 70 #define YYFREE free 71 %} 72 73 %union 74 { 75 UINT64 value; 76 UINT32 op; 77 char *str; 78 } 79 80 /*! [Begin] no source code translation */ 81 82 %type <value> Expression 83 84 %token <op> EXPOP_EOF 85 %token <op> EXPOP_NEW_LINE 86 %token <op> EXPOP_NUMBER 87 %token <op> EXPOP_HEX_NUMBER 88 %token <op> EXPOP_RESERVED1 89 %token <op> EXPOP_RESERVED2 90 %token <op> EXPOP_PAREN_OPEN 91 %token <op> EXPOP_PAREN_CLOSE 92 93 %left <op> EXPOP_LOGICAL_OR 94 %left <op> EXPOP_LOGICAL_AND 95 %left <op> EXPOP_OR 96 %left <op> EXPOP_XOR 97 %left <op> EXPOP_AND 98 %left <op> EXPOP_EQUAL EXPOP_NOT_EQUAL 99 %left <op> EXPOP_GREATER EXPOP_LESS EXPOP_GREATER_EQUAL EXPOP_LESS_EQUAL 100 %left <op> EXPOP_SHIFT_RIGHT EXPOP_SHIFT_LEFT 101 %left <op> EXPOP_ADD EXPOP_SUBTRACT 102 %left <op> EXPOP_MULTIPLY EXPOP_DIVIDE EXPOP_MODULO 103 %right <op> EXPOP_ONES_COMPLIMENT EXPOP_LOGICAL_NOT 104 105 /* Tokens above must be kept in synch with dtparser.y */ 106 107 %token <op> EXPOP_DEFINE 108 %token <op> EXPOP_IDENTIFIER 109 110 %% 111 112 /* 113 * Operator precedence rules (from K&R) 114 * 115 * 1) ( ) 116 * 2) ! ~ (unary operators that are supported here) 117 * 3) * / % 118 * 4) + - 119 * 5) >> << 120 * 6) < > <= >= 121 * 7) == != 122 * 8) & 123 * 9) ^ 124 * 10) | 125 * 11) && 126 * 12) || 127 */ 128 129 /*! [End] no source code translation !*/ 130 131 Value 132 : Expression EXPOP_NEW_LINE { PrParserResult=$1; return 0; } /* End of line (newline) */ 133 | Expression EXPOP_EOF { PrParserResult=$1; return 0; } /* End of string (0) */ 134 ; 135 136 Expression 137 138 /* Unary operators */ 139 140 : EXPOP_LOGICAL_NOT Expression { $$ = DtDoOperator ($2, EXPOP_LOGICAL_NOT, $2);} 141 | EXPOP_ONES_COMPLIMENT Expression { $$ = DtDoOperator ($2, EXPOP_ONES_COMPLIMENT, $2);} 142 143 /* Binary operators */ 144 145 | Expression EXPOP_MULTIPLY Expression { $$ = DtDoOperator ($1, EXPOP_MULTIPLY, $3);} 146 | Expression EXPOP_DIVIDE Expression { $$ = DtDoOperator ($1, EXPOP_DIVIDE, $3);} 147 | Expression EXPOP_MODULO Expression { $$ = DtDoOperator ($1, EXPOP_MODULO, $3);} 148 | Expression EXPOP_ADD Expression { $$ = DtDoOperator ($1, EXPOP_ADD, $3);} 149 | Expression EXPOP_SUBTRACT Expression { $$ = DtDoOperator ($1, EXPOP_SUBTRACT, $3);} 150 | Expression EXPOP_SHIFT_RIGHT Expression { $$ = DtDoOperator ($1, EXPOP_SHIFT_RIGHT, $3);} 151 | Expression EXPOP_SHIFT_LEFT Expression { $$ = DtDoOperator ($1, EXPOP_SHIFT_LEFT, $3);} 152 | Expression EXPOP_GREATER Expression { $$ = DtDoOperator ($1, EXPOP_GREATER, $3);} 153 | Expression EXPOP_LESS Expression { $$ = DtDoOperator ($1, EXPOP_LESS, $3);} 154 | Expression EXPOP_GREATER_EQUAL Expression { $$ = DtDoOperator ($1, EXPOP_GREATER_EQUAL, $3);} 155 | Expression EXPOP_LESS_EQUAL Expression { $$ = DtDoOperator ($1, EXPOP_LESS_EQUAL, $3);} 156 | Expression EXPOP_EQUAL Expression { $$ = DtDoOperator ($1, EXPOP_EQUAL, $3);} 157 | Expression EXPOP_NOT_EQUAL Expression { $$ = DtDoOperator ($1, EXPOP_NOT_EQUAL, $3);} 158 | Expression EXPOP_AND Expression { $$ = DtDoOperator ($1, EXPOP_AND, $3);} 159 | Expression EXPOP_XOR Expression { $$ = DtDoOperator ($1, EXPOP_XOR, $3);} 160 | Expression EXPOP_OR Expression { $$ = DtDoOperator ($1, EXPOP_OR, $3);} 161 | Expression EXPOP_LOGICAL_AND Expression { $$ = DtDoOperator ($1, EXPOP_LOGICAL_AND, $3);} 162 | Expression EXPOP_LOGICAL_OR Expression { $$ = DtDoOperator ($1, EXPOP_LOGICAL_OR, $3);} 163 164 /* Parentheses: '(' Expression ')' */ 165 166 | EXPOP_PAREN_OPEN Expression 167 EXPOP_PAREN_CLOSE { $$ = $2;} 168 169 /* #if defined (ID) or #if defined ID */ 170 171 | EXPOP_DEFINE EXPOP_PAREN_OPEN EXPOP_IDENTIFIER 172 EXPOP_PAREN_CLOSE { $$ = PrIsDefined (PrParserlval.str);} 173 174 | EXPOP_DEFINE EXPOP_IDENTIFIER { $$ = PrIsDefined (PrParserlval.str);} 175 176 | EXPOP_IDENTIFIER { $$ = PrResolveDefine (PrParserlval.str);} 177 178 /* Default base for a non-prefixed integer is 10 */ 179 180 | EXPOP_NUMBER { UtStrtoul64 (PrParsertext, 10, &$$);} 181 182 /* Standard hex number (0x1234) */ 183 184 | EXPOP_HEX_NUMBER { UtStrtoul64 (PrParsertext, 16, &$$);} 185 ; 186 %% 187 188 /* 189 * Local support functions, including parser entry point 190 */ 191 #define PR_FIRST_PARSE_OPCODE EXPOP_EOF 192 #define PR_YYTNAME_START 3 193 194 195 /****************************************************************************** 196 * 197 * FUNCTION: PrParsererror 198 * 199 * PARAMETERS: Message - Parser-generated error message 200 * 201 * RETURN: None 202 * 203 * DESCRIPTION: Handler for parser errors 204 * 205 *****************************************************************************/ 206 207 void 208 PrParsererror ( 209 char const *Message) 210 { 211 DtError (ASL_ERROR, ASL_MSG_SYNTAX, 212 NULL, (char *) Message); 213 } 214 215 216 /****************************************************************************** 217 * 218 * FUNCTION: PrGetOpName 219 * 220 * PARAMETERS: ParseOpcode - Parser token (EXPOP_*) 221 * 222 * RETURN: Pointer to the opcode name 223 * 224 * DESCRIPTION: Get the ascii name of the parse opcode for debug output 225 * 226 *****************************************************************************/ 227 228 char * 229 PrGetOpName ( 230 UINT32 ParseOpcode) 231 { 232 #ifdef ASL_YYTNAME_START 233 /* 234 * First entries (PR_YYTNAME_START) in yytname are special reserved names. 235 * Ignore first 6 characters of name (EXPOP_) 236 */ 237 return ((char *) yytname 238 [(ParseOpcode - PR_FIRST_PARSE_OPCODE) + PR_YYTNAME_START] + 6); 239 #else 240 return ("[Unknown parser generator]"); 241 #endif 242 } 243 244 245 /****************************************************************************** 246 * 247 * FUNCTION: PrEvaluateExpression 248 * 249 * PARAMETERS: ExprString - Expression to be evaluated. Must be 250 * terminated by either a newline or a NUL 251 * string terminator 252 * 253 * RETURN: 64-bit value for the expression 254 * 255 * DESCRIPTION: Main entry point for the DT expression parser 256 * 257 *****************************************************************************/ 258 259 UINT64 260 PrEvaluateExpression ( 261 char *ExprString) 262 { 263 264 DbgPrint (ASL_DEBUG_OUTPUT, 265 "**** Input expression: %s\n", ExprString); 266 267 /* Point lexer to the input string */ 268 269 if (PrInitLexer (ExprString)) 270 { 271 DtError (ASL_ERROR, ASL_MSG_COMPILER_INTERNAL, 272 NULL, "Could not initialize lexer"); 273 return (0); 274 } 275 276 /* Parse/Evaluate the input string (value returned in PrParserResult) */ 277 278 PrParserparse (); 279 PrTerminateLexer (); 280 281 DbgPrint (ASL_DEBUG_OUTPUT, 282 "**** Parser returned value: %u (%8.8X%8.8X)\n", 283 (UINT32) PrParserResult, ACPI_FORMAT_UINT64 (PrParserResult)); 284 285 return (PrParserResult); 286 } 287
Indexes created Tue Sep 30 20:09:53 GMT 2025