prparser.y revision 1.10
1 %{ 2 /****************************************************************************** 3 * 4 * Module Name: prparser.y - Bison input file for preprocessor parser 5 * 6 *****************************************************************************/ 7 8 /* 9 * Copyright (C) 2000 - 2017, 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 void * AslLocalAllocate (unsigned int Size); 52 53 /* Bison/yacc configuration */ 54 55 #undef alloca 56 #define alloca AslLocalAllocate 57 58 int PrParserlex (void); 59 int PrParserparse (void); 60 void PrParsererror (char const *msg); 61 extern char *PrParsertext; 62 63 UINT64 PrParserResult; /* Expression return value */ 64 65 /* Bison/yacc configuration */ 66 67 #ifndef yytname 68 #define yytname PrParsername 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 char *str; 85 } 86 87 /*! [Begin] no source code translation */ 88 89 %type <value> Expression 90 91 %token <op> EXPOP_EOF 92 %token <op> EXPOP_NEW_LINE 93 %token <op> EXPOP_NUMBER 94 %token <op> EXPOP_HEX_NUMBER 95 %token <op> EXPOP_RESERVED1 96 %token <op> EXPOP_RESERVED2 97 %token <op> EXPOP_PAREN_OPEN 98 %token <op> EXPOP_PAREN_CLOSE 99 100 %left <op> EXPOP_LOGICAL_OR 101 %left <op> EXPOP_LOGICAL_AND 102 %left <op> EXPOP_OR 103 %left <op> EXPOP_XOR 104 %left <op> EXPOP_AND 105 %left <op> EXPOP_EQUAL EXPOP_NOT_EQUAL 106 %left <op> EXPOP_GREATER EXPOP_LESS EXPOP_GREATER_EQUAL EXPOP_LESS_EQUAL 107 %left <op> EXPOP_SHIFT_RIGHT EXPOP_SHIFT_LEFT 108 %left <op> EXPOP_ADD EXPOP_SUBTRACT 109 %left <op> EXPOP_MULTIPLY EXPOP_DIVIDE EXPOP_MODULO 110 %right <op> EXPOP_ONES_COMPLIMENT EXPOP_LOGICAL_NOT 111 112 /* Tokens above must be kept in synch with dtparser.y */ 113 114 %token <op> EXPOP_DEFINE 115 %token <op> EXPOP_IDENTIFIER 116 117 %% 118 119 /* 120 * Operator precedence rules (from K&R) 121 * 122 * 1) ( ) 123 * 2) ! ~ (unary operators that are supported here) 124 * 3) * / % 125 * 4) + - 126 * 5) >> << 127 * 6) < > <= >= 128 * 7) == != 129 * 8) & 130 * 9) ^ 131 * 10) | 132 * 11) && 133 * 12) || 134 */ 135 136 /*! [End] no source code translation !*/ 137 138 Value 139 : Expression EXPOP_NEW_LINE { PrParserResult=$1; return 0; } /* End of line (newline) */ 140 | Expression EXPOP_EOF { PrParserResult=$1; return 0; } /* End of string (0) */ 141 ; 142 143 Expression 144 145 /* Unary operators */ 146 147 : EXPOP_LOGICAL_NOT Expression { $$ = DtDoOperator ($2, EXPOP_LOGICAL_NOT, $2);} 148 | EXPOP_ONES_COMPLIMENT Expression { $$ = DtDoOperator ($2, EXPOP_ONES_COMPLIMENT, $2);} 149 150 /* Binary operators */ 151 152 | Expression EXPOP_MULTIPLY Expression { $$ = DtDoOperator ($1, EXPOP_MULTIPLY, $3);} 153 | Expression EXPOP_DIVIDE Expression { $$ = DtDoOperator ($1, EXPOP_DIVIDE, $3);} 154 | Expression EXPOP_MODULO Expression { $$ = DtDoOperator ($1, EXPOP_MODULO, $3);} 155 | Expression EXPOP_ADD Expression { $$ = DtDoOperator ($1, EXPOP_ADD, $3);} 156 | Expression EXPOP_SUBTRACT Expression { $$ = DtDoOperator ($1, EXPOP_SUBTRACT, $3);} 157 | Expression EXPOP_SHIFT_RIGHT Expression { $$ = DtDoOperator ($1, EXPOP_SHIFT_RIGHT, $3);} 158 | Expression EXPOP_SHIFT_LEFT Expression { $$ = DtDoOperator ($1, EXPOP_SHIFT_LEFT, $3);} 159 | Expression EXPOP_GREATER Expression { $$ = DtDoOperator ($1, EXPOP_GREATER, $3);} 160 | Expression EXPOP_LESS Expression { $$ = DtDoOperator ($1, EXPOP_LESS, $3);} 161 | Expression EXPOP_GREATER_EQUAL Expression { $$ = DtDoOperator ($1, EXPOP_GREATER_EQUAL, $3);} 162 | Expression EXPOP_LESS_EQUAL Expression { $$ = DtDoOperator ($1, EXPOP_LESS_EQUAL, $3);} 163 | Expression EXPOP_EQUAL Expression { $$ = DtDoOperator ($1, EXPOP_EQUAL, $3);} 164 | Expression EXPOP_NOT_EQUAL Expression { $$ = DtDoOperator ($1, EXPOP_NOT_EQUAL, $3);} 165 | Expression EXPOP_AND Expression { $$ = DtDoOperator ($1, EXPOP_AND, $3);} 166 | Expression EXPOP_XOR Expression { $$ = DtDoOperator ($1, EXPOP_XOR, $3);} 167 | Expression EXPOP_OR Expression { $$ = DtDoOperator ($1, EXPOP_OR, $3);} 168 | Expression EXPOP_LOGICAL_AND Expression { $$ = DtDoOperator ($1, EXPOP_LOGICAL_AND, $3);} 169 | Expression EXPOP_LOGICAL_OR Expression { $$ = DtDoOperator ($1, EXPOP_LOGICAL_OR, $3);} 170 171 /* Parentheses: '(' Expression ')' */ 172 173 | EXPOP_PAREN_OPEN Expression 174 EXPOP_PAREN_CLOSE { $$ = $2;} 175 176 /* #if defined (ID) or #if defined ID */ 177 178 | EXPOP_DEFINE EXPOP_PAREN_OPEN EXPOP_IDENTIFIER 179 EXPOP_PAREN_CLOSE { $$ = PrIsDefined (PrParserlval.str);} 180 181 | EXPOP_DEFINE EXPOP_IDENTIFIER { $$ = PrIsDefined (PrParserlval.str);} 182 183 | EXPOP_IDENTIFIER { $$ = PrResolveDefine (PrParserlval.str);} 184 185 /* Default base for a non-prefixed integer is 10 */ 186 187 | EXPOP_NUMBER { AcpiUtStrtoul64 (PrParsertext, &$$);} 188 189 /* Standard hex number (0x1234) */ 190 191 | EXPOP_HEX_NUMBER { AcpiUtStrtoul64 (PrParsertext, &$$);} 192 ; 193 %% 194 195 /* 196 * Local support functions, including parser entry point 197 */ 198 #define PR_FIRST_PARSE_OPCODE EXPOP_EOF 199 #define PR_YYTNAME_START 3 200 201 202 /****************************************************************************** 203 * 204 * FUNCTION: PrParsererror 205 * 206 * PARAMETERS: Message - Parser-generated error message 207 * 208 * RETURN: None 209 * 210 * DESCRIPTION: Handler for parser errors 211 * 212 *****************************************************************************/ 213 214 void 215 PrParsererror ( 216 char const *Message) 217 { 218 219 sprintf (StringBuffer, "Preprocessor Parser : %s (near line %u)", 220 Message, Gbl_CurrentLineNumber); 221 DtError (ASL_ERROR, ASL_MSG_SYNTAX, 222 NULL, (char *) StringBuffer); 223 } 224 225 226 /****************************************************************************** 227 * 228 * FUNCTION: PrGetOpName 229 * 230 * PARAMETERS: ParseOpcode - Parser token (EXPOP_*) 231 * 232 * RETURN: Pointer to the opcode name 233 * 234 * DESCRIPTION: Get the ascii name of the parse opcode for debug output 235 * 236 *****************************************************************************/ 237 238 char * 239 PrGetOpName ( 240 UINT32 ParseOpcode) 241 { 242 #ifdef ASL_YYTNAME_START 243 /* 244 * First entries (PR_YYTNAME_START) in yytname are special reserved names. 245 * Ignore first 6 characters of name (EXPOP_) 246 */ 247 return ((char *) yytname 248 [(ParseOpcode - PR_FIRST_PARSE_OPCODE) + PR_YYTNAME_START] + 6); 249 #else 250 return ("[Unknown parser generator]"); 251 #endif 252 } 253 254 255 /****************************************************************************** 256 * 257 * FUNCTION: PrEvaluateExpression 258 * 259 * PARAMETERS: ExprString - Expression to be evaluated. Must be 260 * terminated by either a newline or a NUL 261 * string terminator 262 * 263 * RETURN: 64-bit value for the expression 264 * 265 * DESCRIPTION: Main entry point for the DT expression parser 266 * 267 *****************************************************************************/ 268 269 UINT64 270 PrEvaluateExpression ( 271 char *ExprString) 272 { 273 274 DbgPrint (ASL_DEBUG_OUTPUT, 275 "**** Input expression: %s\n", ExprString); 276 277 /* Point lexer to the input string */ 278 279 if (PrInitLexer (ExprString)) 280 { 281 DtError (ASL_ERROR, ASL_MSG_COMPILER_INTERNAL, 282 NULL, "Could not initialize lexer"); 283 return (0); 284 } 285 286 /* Parse/Evaluate the input string (value returned in PrParserResult) */ 287 288 PrParserparse (); 289 PrTerminateLexer (); 290 291 DbgPrint (ASL_DEBUG_OUTPUT, 292 "**** Parser returned value: %u (%8.8X%8.8X)\n", 293 (UINT32) PrParserResult, ACPI_FORMAT_UINT64 (PrParserResult)); 294 295 return (PrParserResult); 296 } 297
Indexes created Tue Sep 30 11:09:46 GMT 2025