prparser.y revision 1.16
1 %{ 2 /****************************************************************************** 3 * 4 * Module Name: prparser.y - Bison input file for preprocessor parser 5 * 6 *****************************************************************************/ 7 8 /* 9 * Copyright (C) 2000 - 2021, 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 MERCHANTABILITY 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 ASL_PREPROCESSOR 48 ACPI_MODULE_NAME ("prparser") 49 50 void * AslLocalAllocate (unsigned int Size); 51 52 /* Bison/yacc configuration */ 53 54 #undef alloca 55 #define alloca AslLocalAllocate 56 57 int PrParserlex (void); 58 int PrParserparse (void); 59 void PrParsererror (char const *msg); 60 extern char *PrParsertext; 61 62 UINT64 PrParserResult; /* Expression return value */ 63 64 /* Bison/yacc configuration */ 65 66 #ifndef yytname 67 #define yytname PrParsername 68 #endif 69 #define YYDEBUG 1 /* Enable debug output */ 70 #define YYERROR_VERBOSE 1 /* Verbose error messages */ 71 #define YYFLAG -32768 72 73 /* Define YYMALLOC/YYFREE to prevent redefinition errors */ 74 75 #define YYMALLOC malloc 76 #define YYFREE free 77 %} 78 79 %union 80 { 81 UINT64 value; 82 UINT32 op; 83 char *str; 84 } 85 86 /*! [Begin] no source code translation */ 87 88 %type <value> Expression 89 90 %token <op> EXPOP_EOF 91 %token <op> EXPOP_NEW_LINE 92 %token <op> EXPOP_NUMBER 93 %token <op> EXPOP_HEX_NUMBER 94 %token <op> EXPOP_RESERVED1 95 %token <op> EXPOP_RESERVED2 96 %token <op> EXPOP_PAREN_OPEN 97 %token <op> EXPOP_PAREN_CLOSE 98 99 %left <op> EXPOP_LOGICAL_OR 100 %left <op> EXPOP_LOGICAL_AND 101 %left <op> EXPOP_OR 102 %left <op> EXPOP_XOR 103 %left <op> EXPOP_AND 104 %left <op> EXPOP_EQUAL EXPOP_NOT_EQUAL 105 %left <op> EXPOP_GREATER EXPOP_LESS EXPOP_GREATER_EQUAL EXPOP_LESS_EQUAL 106 %left <op> EXPOP_SHIFT_RIGHT EXPOP_SHIFT_LEFT 107 %left <op> EXPOP_ADD EXPOP_SUBTRACT 108 %left <op> EXPOP_MULTIPLY EXPOP_DIVIDE EXPOP_MODULO 109 %right <op> EXPOP_ONES_COMPLIMENT EXPOP_LOGICAL_NOT 110 111 /* Tokens above must be kept in synch with dtparser.y */ 112 113 %token <op> EXPOP_DEFINE 114 %token <op> EXPOP_IDENTIFIER 115 116 %% 117 118 /* 119 * Operator precedence rules (from K&R) 120 * 121 * 1) ( ) 122 * 2) ! ~ (unary operators that are supported here) 123 * 3) * / % 124 * 4) + - 125 * 5) >> << 126 * 6) < > <= >= 127 * 7) == != 128 * 8) & 129 * 9) ^ 130 * 10) | 131 * 11) && 132 * 12) || 133 */ 134 135 /*! [End] no source code translation !*/ 136 137 Value 138 : Expression EXPOP_NEW_LINE { PrParserResult=$1; return 0; } /* End of line (newline) */ 139 | Expression EXPOP_EOF { PrParserResult=$1; return 0; } /* End of string (0) */ 140 ; 141 142 Expression 143 144 /* Unary operators */ 145 146 : EXPOP_LOGICAL_NOT Expression { $$ = DtDoOperator ($2, EXPOP_LOGICAL_NOT, $2);} 147 | EXPOP_ONES_COMPLIMENT Expression { $$ = DtDoOperator ($2, EXPOP_ONES_COMPLIMENT, $2);} 148 149 /* Binary operators */ 150 151 | Expression EXPOP_MULTIPLY Expression { $$ = DtDoOperator ($1, EXPOP_MULTIPLY, $3);} 152 | Expression EXPOP_DIVIDE Expression { $$ = DtDoOperator ($1, EXPOP_DIVIDE, $3);} 153 | Expression EXPOP_MODULO Expression { $$ = DtDoOperator ($1, EXPOP_MODULO, $3);} 154 | Expression EXPOP_ADD Expression { $$ = DtDoOperator ($1, EXPOP_ADD, $3);} 155 | Expression EXPOP_SUBTRACT Expression { $$ = DtDoOperator ($1, EXPOP_SUBTRACT, $3);} 156 | Expression EXPOP_SHIFT_RIGHT Expression { $$ = DtDoOperator ($1, EXPOP_SHIFT_RIGHT, $3);} 157 | Expression EXPOP_SHIFT_LEFT Expression { $$ = DtDoOperator ($1, EXPOP_SHIFT_LEFT, $3);} 158 | Expression EXPOP_GREATER Expression { $$ = DtDoOperator ($1, EXPOP_GREATER, $3);} 159 | Expression EXPOP_LESS Expression { $$ = DtDoOperator ($1, EXPOP_LESS, $3);} 160 | Expression EXPOP_GREATER_EQUAL Expression { $$ = DtDoOperator ($1, EXPOP_GREATER_EQUAL, $3);} 161 | Expression EXPOP_LESS_EQUAL Expression { $$ = DtDoOperator ($1, EXPOP_LESS_EQUAL, $3);} 162 | Expression EXPOP_EQUAL Expression { $$ = DtDoOperator ($1, EXPOP_EQUAL, $3);} 163 | Expression EXPOP_NOT_EQUAL Expression { $$ = DtDoOperator ($1, EXPOP_NOT_EQUAL, $3);} 164 | Expression EXPOP_AND Expression { $$ = DtDoOperator ($1, EXPOP_AND, $3);} 165 | Expression EXPOP_XOR Expression { $$ = DtDoOperator ($1, EXPOP_XOR, $3);} 166 | Expression EXPOP_OR Expression { $$ = DtDoOperator ($1, EXPOP_OR, $3);} 167 | Expression EXPOP_LOGICAL_AND Expression { $$ = DtDoOperator ($1, EXPOP_LOGICAL_AND, $3);} 168 | Expression EXPOP_LOGICAL_OR Expression { $$ = DtDoOperator ($1, EXPOP_LOGICAL_OR, $3);} 169 170 /* Parentheses: '(' Expression ')' */ 171 172 | EXPOP_PAREN_OPEN Expression 173 EXPOP_PAREN_CLOSE { $$ = $2;} 174 175 /* #if defined (ID) or #if defined ID */ 176 177 | EXPOP_DEFINE EXPOP_PAREN_OPEN EXPOP_IDENTIFIER 178 EXPOP_PAREN_CLOSE { $$ = PrIsDefined (PrParserlval.str);} 179 180 | EXPOP_DEFINE EXPOP_IDENTIFIER { $$ = PrIsDefined (PrParserlval.str);} 181 182 | EXPOP_IDENTIFIER { $$ = PrResolveDefine (PrParserlval.str);} 183 184 /* Default base for a non-prefixed integer is 10 */ 185 186 | EXPOP_NUMBER { AcpiUtStrtoul64 (PrParsertext, &$$);} 187 188 /* Standard hex number (0x1234) */ 189 190 | EXPOP_HEX_NUMBER { AcpiUtStrtoul64 (PrParsertext, &$$);} 191 ; 192 %% 193 194 /* 195 * Local support functions, including parser entry point 196 */ 197 #define PR_FIRST_PARSE_OPCODE EXPOP_EOF 198 #define PR_YYTNAME_START 3 199 200 201 /****************************************************************************** 202 * 203 * FUNCTION: PrParsererror 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 PrParsererror ( 215 char const *Message) 216 { 217 218 sprintf (AslGbl_StringBuffer, "Preprocessor Parser : %s (near line %u)", 219 Message, AslGbl_CurrentLineNumber); 220 DtError (ASL_ERROR, ASL_MSG_SYNTAX, 221 NULL, (char *) AslGbl_StringBuffer); 222 } 223 224 225 /****************************************************************************** 226 * 227 * FUNCTION: PrGetOpName 228 * 229 * PARAMETERS: ParseOpcode - Parser token (EXPOP_*) 230 * 231 * RETURN: Pointer to the opcode name 232 * 233 * DESCRIPTION: Get the ascii name of the parse opcode for debug output 234 * 235 *****************************************************************************/ 236 237 char * 238 PrGetOpName ( 239 UINT32 ParseOpcode) 240 { 241 #ifdef ASL_YYTNAME_START 242 /* 243 * First entries (PR_YYTNAME_START) in yytname are special reserved names. 244 * Ignore first 6 characters of name (EXPOP_) 245 */ 246 return ((char *) yytname 247 [(ParseOpcode - PR_FIRST_PARSE_OPCODE) + PR_YYTNAME_START] + 6); 248 #else 249 return ("[Unknown parser generator]"); 250 #endif 251 } 252 253 254 /****************************************************************************** 255 * 256 * FUNCTION: PrEvaluateExpression 257 * 258 * PARAMETERS: ExprString - Expression to be evaluated. Must be 259 * terminated by either a newline or a NUL 260 * string terminator 261 * 262 * RETURN: 64-bit value for the expression 263 * 264 * DESCRIPTION: Main entry point for the DT expression parser 265 * 266 *****************************************************************************/ 267 268 UINT64 269 PrEvaluateExpression ( 270 char *ExprString) 271 { 272 273 DbgPrint (ASL_DEBUG_OUTPUT, 274 "**** Input expression: %s\n", ExprString); 275 276 /* Point lexer to the input string */ 277 278 if (PrInitLexer (ExprString)) 279 { 280 DtError (ASL_ERROR, ASL_MSG_COMPILER_INTERNAL, 281 NULL, "Could not initialize lexer"); 282 return (0); 283 } 284 285 /* Parse/Evaluate the input string (value returned in PrParserResult) */ 286 287 PrParserparse (); 288 PrTerminateLexer (); 289 290 DbgPrint (ASL_DEBUG_OUTPUT, 291 "**** Parser returned value: %u (%8.8X%8.8X)\n", 292 (UINT32) PrParserResult, ACPI_FORMAT_UINT64 (PrParserResult)); 293 294 return (PrParserResult); 295 } 296
Indexes created Tue Sep 30 11:09:46 GMT 2025