dtparser.y revision 1.13
1 %{ 2 /****************************************************************************** 3 * 4 * Module Name: dtparser.y - Bison input file for table compiler parser 5 * 6 *****************************************************************************/ 7 8 /* 9 * Copyright (C) 2000 - 2018, 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 47 #define _COMPONENT DT_COMPILER 48 ACPI_MODULE_NAME ("dtparser") 49 50 void * AslLocalAllocate (unsigned int Size); 51 52 /* Bison/yacc configuration */ 53 54 #undef alloca 55 #define alloca AslLocalAllocate 56 57 int DtParserlex (void); 58 int DtParserparse (void); 59 void DtParsererror (char const *msg); 60 extern char *DtParsertext; 61 extern DT_FIELD *AslGbl_CurrentField; 62 63 UINT64 DtParserResult; /* Expression return value */ 64 65 /* Bison/yacc configuration */ 66 67 #ifndef yytname 68 #define yytname DtParsername 69 #endif 70 #define YYDEBUG 1 /* Enable debug output */ 71 #define YYERROR_VERBOSE 1 /* Verbose error messages */ 72 #define YYFLAG -32768 73 74 /* Define YYMALLOC/YYFREE to prevent redefinition errors */ 75 76 #define YYMALLOC malloc 77 #define YYFREE free 78 %} 79 80 %union 81 { 82 UINT64 value; 83 UINT32 op; 84 } 85 86 /*! [Begin] no source code translation */ 87 88 %type <value> Expression 89 90 %token <op> OP_EXP_EOF 91 %token <op> OP_EXP_NEW_LINE 92 %token <op> OP_EXP_NUMBER 93 %token <op> OP_EXP_HEX_NUMBER 94 %token <op> OP_EXP_DECIMAL_NUMBER 95 %token <op> OP_EXP_LABEL 96 %token <op> OP_EXP_PAREN_OPEN 97 %token <op> OP_EXP_PAREN_CLOSE 98 99 %left <op> OP_EXP_LOGICAL_OR 100 %left <op> OP_EXP_LOGICAL_AND 101 %left <op> OP_EXP_OR 102 %left <op> OP_EXP_XOR 103 %left <op> OP_EXP_AND 104 %left <op> OP_EXP_EQUAL OP_EXP_NOT_EQUAL 105 %left <op> OP_EXP_GREATER OP_EXP_LESS OP_EXP_GREATER_EQUAL OP_EXP_LESS_EQUAL 106 %left <op> OP_EXP_SHIFT_RIGHT OP_EXP_SHIFT_LEFT 107 %left <op> OP_EXP_ADD OP_EXP_SUBTRACT 108 %left <op> OP_EXP_MULTIPLY OP_EXP_DIVIDE OP_EXP_MODULO 109 %right <op> OP_EXP_ONES_COMPLIMENT OP_EXP_LOGICAL_NOT 110 111 %% 112 113 /* 114 * Operator precedence rules (from K&R) 115 * 116 * 1) ( ) 117 * 2) ! ~ (unary operators that are supported here) 118 * 3) * / % 119 * 4) + - 120 * 5) >> << 121 * 6) < > <= >= 122 * 7) == != 123 * 8) & 124 * 9) ^ 125 * 10) | 126 * 11) && 127 * 12) || 128 */ 129 Value 130 : Expression OP_EXP_NEW_LINE { DtParserResult=$1; return 0; } /* End of line (newline) */ 131 | Expression OP_EXP_EOF { DtParserResult=$1; return 0; } /* End of string (0) */ 132 ; 133 134 Expression 135 136 /* Unary operators */ 137 138 : OP_EXP_LOGICAL_NOT Expression { $$ = DtDoOperator ($2, OP_EXP_LOGICAL_NOT, $2);} 139 | OP_EXP_ONES_COMPLIMENT Expression { $$ = DtDoOperator ($2, OP_EXP_ONES_COMPLIMENT, $2);} 140 141 /* Binary operators */ 142 143 | Expression OP_EXP_MULTIPLY Expression { $$ = DtDoOperator ($1, OP_EXP_MULTIPLY, $3);} 144 | Expression OP_EXP_DIVIDE Expression { $$ = DtDoOperator ($1, OP_EXP_DIVIDE, $3);} 145 | Expression OP_EXP_MODULO Expression { $$ = DtDoOperator ($1, OP_EXP_MODULO, $3);} 146 | Expression OP_EXP_ADD Expression { $$ = DtDoOperator ($1, OP_EXP_ADD, $3);} 147 | Expression OP_EXP_SUBTRACT Expression { $$ = DtDoOperator ($1, OP_EXP_SUBTRACT, $3);} 148 | Expression OP_EXP_SHIFT_RIGHT Expression { $$ = DtDoOperator ($1, OP_EXP_SHIFT_RIGHT, $3);} 149 | Expression OP_EXP_SHIFT_LEFT Expression { $$ = DtDoOperator ($1, OP_EXP_SHIFT_LEFT, $3);} 150 | Expression OP_EXP_GREATER Expression { $$ = DtDoOperator ($1, OP_EXP_GREATER, $3);} 151 | Expression OP_EXP_LESS Expression { $$ = DtDoOperator ($1, OP_EXP_LESS, $3);} 152 | Expression OP_EXP_GREATER_EQUAL Expression { $$ = DtDoOperator ($1, OP_EXP_GREATER_EQUAL, $3);} 153 | Expression OP_EXP_LESS_EQUAL Expression { $$ = DtDoOperator ($1, OP_EXP_LESS_EQUAL, $3);} 154 | Expression OP_EXP_EQUAL Expression { $$ = DtDoOperator ($1, OP_EXP_EQUAL, $3);} 155 | Expression OP_EXP_NOT_EQUAL Expression { $$ = DtDoOperator ($1, OP_EXP_NOT_EQUAL, $3);} 156 | Expression OP_EXP_AND Expression { $$ = DtDoOperator ($1, OP_EXP_AND, $3);} 157 | Expression OP_EXP_XOR Expression { $$ = DtDoOperator ($1, OP_EXP_XOR, $3);} 158 | Expression OP_EXP_OR Expression { $$ = DtDoOperator ($1, OP_EXP_OR, $3);} 159 | Expression OP_EXP_LOGICAL_AND Expression { $$ = DtDoOperator ($1, OP_EXP_LOGICAL_AND, $3);} 160 | Expression OP_EXP_LOGICAL_OR Expression { $$ = DtDoOperator ($1, OP_EXP_LOGICAL_OR, $3);} 161 162 /* Parentheses: '(' Expression ')' */ 163 164 | OP_EXP_PAREN_OPEN Expression 165 OP_EXP_PAREN_CLOSE { $$ = $2;} 166 167 /* Label references (prefixed with $) */ 168 169 | OP_EXP_LABEL { $$ = DtResolveLabel (DtParsertext);} 170 171 /* 172 * All constants for the data table compiler are in hex, whether a (optional) 0x 173 * prefix is present or not. For example, these two input strings are equivalent: 174 * 1234 175 * 0x1234 176 */ 177 178 /* Non-prefixed hex number */ 179 180 | OP_EXP_NUMBER { $$ = DtDoConstant (DtParsertext);} 181 182 /* Standard hex number (0x1234) */ 183 184 | OP_EXP_HEX_NUMBER { $$ = DtDoConstant (DtParsertext);} 185 186 /* Possible TBD: Decimal number with prefix (0d1234) - Not supported this time */ 187 188 | OP_EXP_DECIMAL_NUMBER { $$ = DtDoConstant (DtParsertext);} 189 ; 190 %% 191 192 /*! [End] no source code translation !*/ 193 194 /* 195 * Local support functions, including parser entry point 196 */ 197 #define PR_FIRST_PARSE_OPCODE OP_EXP_EOF 198 #define PR_YYTNAME_START 3 199 200 201 /****************************************************************************** 202 * 203 * FUNCTION: DtParsererror 204 * 205 * PARAMETERS: Message - Parser-generated error message 206 * 207 * RETURN: None 208 * 209 * DESCRIPTION: Handler for parser errors 210 * 211 *****************************************************************************/ 212 213 void 214 DtParsererror ( 215 char const *Message) 216 { 217 DtError (ASL_ERROR, ASL_MSG_SYNTAX, 218 AslGbl_CurrentField, (char *) Message); 219 } 220 221 222 /****************************************************************************** 223 * 224 * FUNCTION: DtGetOpName 225 * 226 * PARAMETERS: ParseOpcode - Parser token (OP_EXP_*) 227 * 228 * RETURN: Pointer to the opcode name 229 * 230 * DESCRIPTION: Get the ascii name of the parse opcode for debug output 231 * 232 *****************************************************************************/ 233 234 char * 235 DtGetOpName ( 236 UINT32 ParseOpcode) 237 { 238 #ifdef ASL_YYTNAME_START 239 /* 240 * First entries (PR_YYTNAME_START) in yytname are special reserved names. 241 * Ignore first 6 characters of name (OP_EXP_) 242 */ 243 return ((char *) yytname 244 [(ParseOpcode - PR_FIRST_PARSE_OPCODE) + PR_YYTNAME_START] + 6); 245 #else 246 return ("[Unknown parser generator]"); 247 #endif 248 } 249 250 251 /****************************************************************************** 252 * 253 * FUNCTION: DtEvaluateExpression 254 * 255 * PARAMETERS: ExprString - Expression to be evaluated. Must be 256 * terminated by either a newline or a NUL 257 * string terminator 258 * 259 * RETURN: 64-bit value for the expression 260 * 261 * DESCRIPTION: Main entry point for the DT expression parser 262 * 263 *****************************************************************************/ 264 265 UINT64 266 DtEvaluateExpression ( 267 char *ExprString) 268 { 269 270 DbgPrint (ASL_DEBUG_OUTPUT, 271 "**** Input expression: %s (Base 16)\n", ExprString); 272 273 /* Point lexer to the input string */ 274 275 if (DtInitLexer (ExprString)) 276 { 277 DtError (ASL_ERROR, ASL_MSG_COMPILER_INTERNAL, 278 AslGbl_CurrentField, "Could not initialize lexer"); 279 return (0); 280 } 281 282 /* Parse/Evaluate the input string (value returned in DtParserResult) */ 283 284 DtParserparse (); 285 DtTerminateLexer (); 286 287 DbgPrint (ASL_DEBUG_OUTPUT, 288 "**** Parser returned value: %u (%8.8X%8.8X)\n", 289 (UINT32) DtParserResult, ACPI_FORMAT_UINT64 (DtParserResult)); 290 291 return (DtParserResult); 292 } 293
Indexes created Tue Sep 30 20:09:53 GMT 2025