1 %{ 2 /****************************************************************************** 3 * 4 * Module Name: dtparser.y - Bison input file for table compiler parser 5 * 6 *****************************************************************************/ 7 8 /****************************************************************************** 9 * 10 * 1. Copyright Notice 11 * 12 * Some or all of this work - Copyright (c) 1999 - 2017, Intel Corp. 13 * All rights reserved. 14 * 15 * 2. License 16 * 17 * 2.1. This is your license from Intel Corp. under its intellectual property 18 * rights. You may have additional license terms from the party that provided 19 * you this software, covering your right to use that party's intellectual 20 * property rights. 21 * 22 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a 23 * copy of the source code appearing in this file ("Covered Code") an 24 * irrevocable, perpetual, worldwide license under Intel's copyrights in the 25 * base code distributed originally by Intel ("Original Intel Code") to copy, 26 * make derivatives, distribute, use and display any portion of the Covered 27 * Code in any form, with the right to sublicense such rights; and 28 * 29 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent 30 * license (with the right to sublicense), under only those claims of Intel 31 * patents that are infringed by the Original Intel Code, to make, use, sell, 32 * offer to sell, and import the Covered Code and derivative works thereof 33 * solely to the minimum extent necessary to exercise the above copyright 34 * license, and in no event shall the patent license extend to any additions 35 * to or modifications of the Original Intel Code. No other license or right 36 * is granted directly or by implication, estoppel or otherwise; 37 * 38 * The above copyright and patent license is granted only if the following 39 * conditions are met: 40 * 41 * 3. Conditions 42 * 43 * 3.1. Redistribution of Source with Rights to Further Distribute Source. 44 * Redistribution of source code of any substantial portion of the Covered 45 * Code or modification with rights to further distribute source must include 46 * the above Copyright Notice, the above License, this list of Conditions, 47 * and the following Disclaimer and Export Compliance provision. In addition, 48 * Licensee must cause all Covered Code to which Licensee contributes to 49 * contain a file documenting the changes Licensee made to create that Covered 50 * Code and the date of any change. Licensee must include in that file the 51 * documentation of any changes made by any predecessor Licensee. Licensee 52 * must include a prominent statement that the modification is derived, 53 * directly or indirectly, from Original Intel Code. 54 * 55 * 3.2. Redistribution of Source with no Rights to Further Distribute Source. 56 * Redistribution of source code of any substantial portion of the Covered 57 * Code or modification without rights to further distribute source must 58 * include the following Disclaimer and Export Compliance provision in the 59 * documentation and/or other materials provided with distribution. In 60 * addition, Licensee may not authorize further sublicense of source of any 61 * portion of the Covered Code, and must include terms to the effect that the 62 * license from Licensee to its licensee is limited to the intellectual 63 * property embodied in the software Licensee provides to its licensee, and 64 * not to intellectual property embodied in modifications its licensee may 65 * make. 66 * 67 * 3.3. Redistribution of Executable. Redistribution in executable form of any 68 * substantial portion of the Covered Code or modification must reproduce the 69 * above Copyright Notice, and the following Disclaimer and Export Compliance 70 * provision in the documentation and/or other materials provided with the 71 * distribution. 72 * 73 * 3.4. Intel retains all right, title, and interest in and to the Original 74 * Intel Code. 75 * 76 * 3.5. Neither the name Intel nor any other trademark owned or controlled by 77 * Intel shall be used in advertising or otherwise to promote the sale, use or 78 * other dealings in products derived from or relating to the Covered Code 79 * without prior written authorization from Intel. 80 * 81 * 4. Disclaimer and Export Compliance 82 * 83 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED 84 * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE 85 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, 86 * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY 87 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY 88 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A 89 * PARTICULAR PURPOSE. 90 * 91 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES 92 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR 93 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, 94 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY 95 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL 96 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS 97 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY 98 * LIMITED REMEDY. 99 * 100 * 4.3. Licensee shall not export, either directly or indirectly, any of this 101 * software or system incorporating such software without first obtaining any 102 * required license or other approval from the U. S. Department of Commerce or 103 * any other agency or department of the United States Government. In the 104 * event Licensee exports any such software from the United States or 105 * re-exports any such software from a foreign destination, Licensee shall 106 * ensure that the distribution and export/re-export of the software is in 107 * compliance with all laws, regulations, orders, or other restrictions of the 108 * U.S. Export Administration Regulations. Licensee agrees that neither it nor 109 * any of its subsidiaries will export/re-export any technical data, process, 110 * software, or service, directly or indirectly, to any country for which the 111 * United States government or any agency thereof requires an export license, 112 * other governmental approval, or letter of assurance, without first obtaining 113 * such license, approval or letter. 114 * 115 ***************************************************************************** 116 * 117 * Alternatively, you may choose to be licensed under the terms of the 118 * following license: 119 * 120 * Redistribution and use in source and binary forms, with or without 121 * modification, are permitted provided that the following conditions 122 * are met: 123 * 1. Redistributions of source code must retain the above copyright 124 * notice, this list of conditions, and the following disclaimer, 125 * without modification. 126 * 2. Redistributions in binary form must reproduce at minimum a disclaimer 127 * substantially similar to the "NO WARRANTY" disclaimer below 128 * ("Disclaimer") and any redistribution must be conditioned upon 129 * including a substantially similar Disclaimer requirement for further 130 * binary redistribution. 131 * 3. Neither the names of the above-listed copyright holders nor the names 132 * of any contributors may be used to endorse or promote products derived 133 * from this software without specific prior written permission. 134 * 135 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 136 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 137 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 138 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 139 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 140 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 141 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 142 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 143 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 144 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 145 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 146 * 147 * Alternatively, you may choose to be licensed under the terms of the 148 * GNU General Public License ("GPL") version 2 as published by the Free 149 * Software Foundation. 150 * 151 *****************************************************************************/ 152 153 #include "aslcompiler.h" 154 #include "dtcompiler.h" 155 156 #define _COMPONENT DT_COMPILER 157 ACPI_MODULE_NAME ("dtparser") 158 159 void * AslLocalAllocate (unsigned int Size); 160 161 /* Bison/yacc configuration */ 162 163 #undef alloca 164 #define alloca AslLocalAllocate 165 166 int DtParserlex (void); 167 int DtParserparse (void); 168 void DtParsererror (char const *msg); 169 extern char *DtParsertext; 170 extern DT_FIELD *Gbl_CurrentField; 171 172 UINT64 DtParserResult; /* Expression return value */ 173 174 /* Bison/yacc configuration */ 175 176 #define yytname DtParsername 177 #define YYDEBUG 1 /* Enable debug output */ 178 #define YYERROR_VERBOSE 1 /* Verbose error messages */ 179 #define YYFLAG -32768 180 181 /* Define YYMALLOC/YYFREE to prevent redefinition errors */ 182 183 #define YYMALLOC malloc 184 #define YYFREE free 185 %} 186 187 %union 188 { 189 UINT64 value; 190 UINT32 op; 191 } 192 193 /*! [Begin] no source code translation */ 194 195 %type <value> Expression 196 197 %token <op> EXPOP_EOF 198 %token <op> EXPOP_NEW_LINE 199 %token <op> EXPOP_NUMBER 200 %token <op> EXPOP_HEX_NUMBER 201 %token <op> EXPOP_DECIMAL_NUMBER 202 %token <op> EXPOP_LABEL 203 %token <op> EXPOP_PAREN_OPEN 204 %token <op> EXPOP_PAREN_CLOSE 205 206 %left <op> EXPOP_LOGICAL_OR 207 %left <op> EXPOP_LOGICAL_AND 208 %left <op> EXPOP_OR 209 %left <op> EXPOP_XOR 210 %left <op> EXPOP_AND 211 %left <op> EXPOP_EQUAL EXPOP_NOT_EQUAL 212 %left <op> EXPOP_GREATER EXPOP_LESS EXPOP_GREATER_EQUAL EXPOP_LESS_EQUAL 213 %left <op> EXPOP_SHIFT_RIGHT EXPOP_SHIFT_LEFT 214 %left <op> EXPOP_ADD EXPOP_SUBTRACT 215 %left <op> EXPOP_MULTIPLY EXPOP_DIVIDE EXPOP_MODULO 216 %right <op> EXPOP_ONES_COMPLIMENT EXPOP_LOGICAL_NOT 217 218 %% 219 220 /* 221 * Operator precedence rules (from K&R) 222 * 223 * 1) ( ) 224 * 2) ! ~ (unary operators that are supported here) 225 * 3) * / % 226 * 4) + - 227 * 5) >> << 228 * 6) < > <= >= 229 * 7) == != 230 * 8) & 231 * 9) ^ 232 * 10) | 233 * 11) && 234 * 12) || 235 */ 236 Value 237 : Expression EXPOP_NEW_LINE { DtParserResult=$1; return 0; } /* End of line (newline) */ 238 | Expression EXPOP_EOF { DtParserResult=$1; return 0; } /* End of string (0) */ 239 ; 240 241 Expression 242 243 /* Unary operators */ 244 245 : EXPOP_LOGICAL_NOT Expression { $$ = DtDoOperator ($2, EXPOP_LOGICAL_NOT, $2);} 246 | EXPOP_ONES_COMPLIMENT Expression { $$ = DtDoOperator ($2, EXPOP_ONES_COMPLIMENT, $2);} 247 248 /* Binary operators */ 249 250 | Expression EXPOP_MULTIPLY Expression { $$ = DtDoOperator ($1, EXPOP_MULTIPLY, $3);} 251 | Expression EXPOP_DIVIDE Expression { $$ = DtDoOperator ($1, EXPOP_DIVIDE, $3);} 252 | Expression EXPOP_MODULO Expression { $$ = DtDoOperator ($1, EXPOP_MODULO, $3);} 253 | Expression EXPOP_ADD Expression { $$ = DtDoOperator ($1, EXPOP_ADD, $3);} 254 | Expression EXPOP_SUBTRACT Expression { $$ = DtDoOperator ($1, EXPOP_SUBTRACT, $3);} 255 | Expression EXPOP_SHIFT_RIGHT Expression { $$ = DtDoOperator ($1, EXPOP_SHIFT_RIGHT, $3);} 256 | Expression EXPOP_SHIFT_LEFT Expression { $$ = DtDoOperator ($1, EXPOP_SHIFT_LEFT, $3);} 257 | Expression EXPOP_GREATER Expression { $$ = DtDoOperator ($1, EXPOP_GREATER, $3);} 258 | Expression EXPOP_LESS Expression { $$ = DtDoOperator ($1, EXPOP_LESS, $3);} 259 | Expression EXPOP_GREATER_EQUAL Expression { $$ = DtDoOperator ($1, EXPOP_GREATER_EQUAL, $3);} 260 | Expression EXPOP_LESS_EQUAL Expression { $$ = DtDoOperator ($1, EXPOP_LESS_EQUAL, $3);} 261 | Expression EXPOP_EQUAL Expression { $$ = DtDoOperator ($1, EXPOP_EQUAL, $3);} 262 | Expression EXPOP_NOT_EQUAL Expression { $$ = DtDoOperator ($1, EXPOP_NOT_EQUAL, $3);} 263 | Expression EXPOP_AND Expression { $$ = DtDoOperator ($1, EXPOP_AND, $3);} 264 | Expression EXPOP_XOR Expression { $$ = DtDoOperator ($1, EXPOP_XOR, $3);} 265 | Expression EXPOP_OR Expression { $$ = DtDoOperator ($1, EXPOP_OR, $3);} 266 | Expression EXPOP_LOGICAL_AND Expression { $$ = DtDoOperator ($1, EXPOP_LOGICAL_AND, $3);} 267 | Expression EXPOP_LOGICAL_OR Expression { $$ = DtDoOperator ($1, EXPOP_LOGICAL_OR, $3);} 268 269 /* Parentheses: '(' Expression ')' */ 270 271 | EXPOP_PAREN_OPEN Expression 272 EXPOP_PAREN_CLOSE { $$ = $2;} 273 274 /* Label references (prefixed with $) */ 275 276 | EXPOP_LABEL { $$ = DtResolveLabel (DtParsertext);} 277 278 /* 279 * All constants for the data table compiler are in hex, whether a (optional) 0x 280 * prefix is present or not. For example, these two input strings are equivalent: 281 * 1234 282 * 0x1234 283 */ 284 285 /* Non-prefixed hex number */ 286 287 | EXPOP_NUMBER { $$ = DtDoConstant (DtParsertext);} 288 289 /* Standard hex number (0x1234) */ 290 291 | EXPOP_HEX_NUMBER { $$ = DtDoConstant (DtParsertext);} 292 293 /* Possible TBD: Decimal number with prefix (0d1234) - Not supported this time */ 294 295 | EXPOP_DECIMAL_NUMBER { $$ = DtDoConstant (DtParsertext);} 296 ; 297 %% 298 299 /*! [End] no source code translation !*/ 300 301 /* 302 * Local support functions, including parser entry point 303 */ 304 #define PR_FIRST_PARSE_OPCODE EXPOP_EOF 305 #define PR_YYTNAME_START 3 306 307 308 /****************************************************************************** 309 * 310 * FUNCTION: DtParsererror 311 * 312 * PARAMETERS: Message - Parser-generated error message 313 * 314 * RETURN: None 315 * 316 * DESCRIPTION: Handler for parser errors 317 * 318 *****************************************************************************/ 319 320 void 321 DtParsererror ( 322 char const *Message) 323 { 324 DtError (ASL_ERROR, ASL_MSG_SYNTAX, 325 Gbl_CurrentField, (char *) Message); 326 } 327 328 329 /****************************************************************************** 330 * 331 * FUNCTION: DtGetOpName 332 * 333 * PARAMETERS: ParseOpcode - Parser token (EXPOP_*) 334 * 335 * RETURN: Pointer to the opcode name 336 * 337 * DESCRIPTION: Get the ascii name of the parse opcode for debug output 338 * 339 *****************************************************************************/ 340 341 char * 342 DtGetOpName ( 343 UINT32 ParseOpcode) 344 { 345 #ifdef ASL_YYTNAME_START 346 /* 347 * First entries (PR_YYTNAME_START) in yytname are special reserved names. 348 * Ignore first 6 characters of name (EXPOP_) 349 */ 350 return ((char *) yytname 351 [(ParseOpcode - PR_FIRST_PARSE_OPCODE) + PR_YYTNAME_START] + 6); 352 #else 353 return ("[Unknown parser generator]"); 354 #endif 355 } 356 357 358 /****************************************************************************** 359 * 360 * FUNCTION: DtEvaluateExpression 361 * 362 * PARAMETERS: ExprString - Expression to be evaluated. Must be 363 * terminated by either a newline or a NUL 364 * string terminator 365 * 366 * RETURN: 64-bit value for the expression 367 * 368 * DESCRIPTION: Main entry point for the DT expression parser 369 * 370 *****************************************************************************/ 371 372 UINT64 373 DtEvaluateExpression ( 374 char *ExprString) 375 { 376 377 DbgPrint (ASL_DEBUG_OUTPUT, 378 "**** Input expression: %s (Base 16)\n", ExprString); 379 380 /* Point lexer to the input string */ 381 382 if (DtInitLexer (ExprString)) 383 { 384 DtError (ASL_ERROR, ASL_MSG_COMPILER_INTERNAL, 385 Gbl_CurrentField, "Could not initialize lexer"); 386 return (0); 387 } 388 389 /* Parse/Evaluate the input string (value returned in DtParserResult) */ 390 391 DtParserparse (); 392 DtTerminateLexer (); 393 394 DbgPrint (ASL_DEBUG_OUTPUT, 395 "**** Parser returned value: %u (%8.8X%8.8X)\n", 396 (UINT32) DtParserResult, ACPI_FORMAT_UINT64 (DtParserResult)); 397 398 return (DtParserResult); 399 } 400