prparser.y revision 316303
1%{ 2/****************************************************************************** 3 * 4 * Module Name: prparser.y - Bison input file for preprocessor 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 <contrib/dev/acpica/compiler/aslcompiler.h> 154#include <contrib/dev/acpica/compiler/dtcompiler.h> 155 156#define _COMPONENT ASL_PREPROCESSOR 157 ACPI_MODULE_NAME ("prparser") 158 159void * AslLocalAllocate (unsigned int Size); 160 161/* Bison/yacc configuration */ 162 163#undef alloca 164#define alloca AslLocalAllocate 165 166int PrParserlex (void); 167int PrParserparse (void); 168void PrParsererror (char const *msg); 169extern char *PrParsertext; 170 171UINT64 PrParserResult; /* Expression return value */ 172 173/* Bison/yacc configuration */ 174 175#define yytname PrParsername 176#define YYDEBUG 1 /* Enable debug output */ 177#define YYERROR_VERBOSE 1 /* Verbose error messages */ 178#define YYFLAG -32768 179 180/* Define YYMALLOC/YYFREE to prevent redefinition errors */ 181 182#define YYMALLOC malloc 183#define YYFREE free 184%} 185 186%union 187{ 188 UINT64 value; 189 UINT32 op; 190 char *str; 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_RESERVED1 202%token <op> EXPOP_RESERVED2 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/* Tokens above must be kept in synch with dtparser.y */ 219 220%token <op> EXPOP_DEFINE 221%token <op> EXPOP_IDENTIFIER 222 223%% 224 225/* 226 * Operator precedence rules (from K&R) 227 * 228 * 1) ( ) 229 * 2) ! ~ (unary operators that are supported here) 230 * 3) * / % 231 * 4) + - 232 * 5) >> << 233 * 6) < > <= >= 234 * 7) == != 235 * 8) & 236 * 9) ^ 237 * 10) | 238 * 11) && 239 * 12) || 240 */ 241 242/*! [End] no source code translation !*/ 243 244Value 245 : Expression EXPOP_NEW_LINE { PrParserResult=$1; return 0; } /* End of line (newline) */ 246 | Expression EXPOP_EOF { PrParserResult=$1; return 0; } /* End of string (0) */ 247 ; 248 249Expression 250 251 /* Unary operators */ 252 253 : EXPOP_LOGICAL_NOT Expression { $$ = DtDoOperator ($2, EXPOP_LOGICAL_NOT, $2);} 254 | EXPOP_ONES_COMPLIMENT Expression { $$ = DtDoOperator ($2, EXPOP_ONES_COMPLIMENT, $2);} 255 256 /* Binary operators */ 257 258 | Expression EXPOP_MULTIPLY Expression { $$ = DtDoOperator ($1, EXPOP_MULTIPLY, $3);} 259 | Expression EXPOP_DIVIDE Expression { $$ = DtDoOperator ($1, EXPOP_DIVIDE, $3);} 260 | Expression EXPOP_MODULO Expression { $$ = DtDoOperator ($1, EXPOP_MODULO, $3);} 261 | Expression EXPOP_ADD Expression { $$ = DtDoOperator ($1, EXPOP_ADD, $3);} 262 | Expression EXPOP_SUBTRACT Expression { $$ = DtDoOperator ($1, EXPOP_SUBTRACT, $3);} 263 | Expression EXPOP_SHIFT_RIGHT Expression { $$ = DtDoOperator ($1, EXPOP_SHIFT_RIGHT, $3);} 264 | Expression EXPOP_SHIFT_LEFT Expression { $$ = DtDoOperator ($1, EXPOP_SHIFT_LEFT, $3);} 265 | Expression EXPOP_GREATER Expression { $$ = DtDoOperator ($1, EXPOP_GREATER, $3);} 266 | Expression EXPOP_LESS Expression { $$ = DtDoOperator ($1, EXPOP_LESS, $3);} 267 | Expression EXPOP_GREATER_EQUAL Expression { $$ = DtDoOperator ($1, EXPOP_GREATER_EQUAL, $3);} 268 | Expression EXPOP_LESS_EQUAL Expression { $$ = DtDoOperator ($1, EXPOP_LESS_EQUAL, $3);} 269 | Expression EXPOP_EQUAL Expression { $$ = DtDoOperator ($1, EXPOP_EQUAL, $3);} 270 | Expression EXPOP_NOT_EQUAL Expression { $$ = DtDoOperator ($1, EXPOP_NOT_EQUAL, $3);} 271 | Expression EXPOP_AND Expression { $$ = DtDoOperator ($1, EXPOP_AND, $3);} 272 | Expression EXPOP_XOR Expression { $$ = DtDoOperator ($1, EXPOP_XOR, $3);} 273 | Expression EXPOP_OR Expression { $$ = DtDoOperator ($1, EXPOP_OR, $3);} 274 | Expression EXPOP_LOGICAL_AND Expression { $$ = DtDoOperator ($1, EXPOP_LOGICAL_AND, $3);} 275 | Expression EXPOP_LOGICAL_OR Expression { $$ = DtDoOperator ($1, EXPOP_LOGICAL_OR, $3);} 276 277 /* Parentheses: '(' Expression ')' */ 278 279 | EXPOP_PAREN_OPEN Expression 280 EXPOP_PAREN_CLOSE { $$ = $2;} 281 282 /* #if defined (ID) or #if defined ID */ 283 284 | EXPOP_DEFINE EXPOP_PAREN_OPEN EXPOP_IDENTIFIER 285 EXPOP_PAREN_CLOSE { $$ = PrIsDefined (PrParserlval.str);} 286 287 | EXPOP_DEFINE EXPOP_IDENTIFIER { $$ = PrIsDefined (PrParserlval.str);} 288 289 | EXPOP_IDENTIFIER { $$ = PrResolveDefine (PrParserlval.str);} 290 291 /* Default base for a non-prefixed integer is 10 */ 292 293 | EXPOP_NUMBER { AcpiUtStrtoul64 (PrParsertext, ACPI_STRTOUL_64BIT, &$$);} 294 295 /* Standard hex number (0x1234) */ 296 297 | EXPOP_HEX_NUMBER { AcpiUtStrtoul64 (PrParsertext, (ACPI_STRTOUL_BASE16 | ACPI_STRTOUL_64BIT), &$$);} 298 ; 299%% 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: PrParsererror 311 * 312 * PARAMETERS: Message - Parser-generated error message 313 * 314 * RETURN: None 315 * 316 * DESCRIPTION: Handler for parser errors 317 * 318 *****************************************************************************/ 319 320void 321PrParsererror ( 322 char const *Message) 323{ 324 325 sprintf (StringBuffer, "Preprocessor Parser : %s (near line %u)", 326 Message, Gbl_CurrentLineNumber); 327 DtError (ASL_ERROR, ASL_MSG_SYNTAX, 328 NULL, (char *) StringBuffer); 329} 330 331 332/****************************************************************************** 333 * 334 * FUNCTION: PrGetOpName 335 * 336 * PARAMETERS: ParseOpcode - Parser token (EXPOP_*) 337 * 338 * RETURN: Pointer to the opcode name 339 * 340 * DESCRIPTION: Get the ascii name of the parse opcode for debug output 341 * 342 *****************************************************************************/ 343 344char * 345PrGetOpName ( 346 UINT32 ParseOpcode) 347{ 348#ifdef ASL_YYTNAME_START 349 /* 350 * First entries (PR_YYTNAME_START) in yytname are special reserved names. 351 * Ignore first 6 characters of name (EXPOP_) 352 */ 353 return ((char *) yytname 354 [(ParseOpcode - PR_FIRST_PARSE_OPCODE) + PR_YYTNAME_START] + 6); 355#else 356 return ("[Unknown parser generator]"); 357#endif 358} 359 360 361/****************************************************************************** 362 * 363 * FUNCTION: PrEvaluateExpression 364 * 365 * PARAMETERS: ExprString - Expression to be evaluated. Must be 366 * terminated by either a newline or a NUL 367 * string terminator 368 * 369 * RETURN: 64-bit value for the expression 370 * 371 * DESCRIPTION: Main entry point for the DT expression parser 372 * 373 *****************************************************************************/ 374 375UINT64 376PrEvaluateExpression ( 377 char *ExprString) 378{ 379 380 DbgPrint (ASL_DEBUG_OUTPUT, 381 "**** Input expression: %s\n", ExprString); 382 383 /* Point lexer to the input string */ 384 385 if (PrInitLexer (ExprString)) 386 { 387 DtError (ASL_ERROR, ASL_MSG_COMPILER_INTERNAL, 388 NULL, "Could not initialize lexer"); 389 return (0); 390 } 391 392 /* Parse/Evaluate the input string (value returned in PrParserResult) */ 393 394 PrParserparse (); 395 PrTerminateLexer (); 396 397 DbgPrint (ASL_DEBUG_OUTPUT, 398 "**** Parser returned value: %u (%8.8X%8.8X)\n", 399 (UINT32) PrParserResult, ACPI_FORMAT_UINT64 (PrParserResult)); 400 401 return (PrParserResult); 402} 403