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 - 2016, 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#include "aslcompiler.h" 118#include "dtcompiler.h" 119 120#define _COMPONENT DT_COMPILER 121 ACPI_MODULE_NAME ("dtparser") 122 123void * AslLocalAllocate (unsigned int Size); 124 125/* Bison/yacc configuration */ 126 127#undef alloca 128#define alloca AslLocalAllocate 129 130int DtParserlex (void); 131int DtParserparse (void); 132void DtParsererror (char const *msg); 133extern char *DtParsertext; 134extern DT_FIELD *Gbl_CurrentField; 135 136UINT64 DtParserResult; /* Expression return value */ 137 138/* Bison/yacc configuration */ 139 140#define yytname DtParsername 141#define YYDEBUG 1 /* Enable debug output */ 142#define YYERROR_VERBOSE 1 /* Verbose error messages */ 143#define YYFLAG -32768 144 145/* Define YYMALLOC/YYFREE to prevent redefinition errors */ 146 147#define YYMALLOC malloc 148#define YYFREE free 149%} 150 151%union 152{ 153 UINT64 value; 154 UINT32 op; 155} 156 157/*! [Begin] no source code translation */ 158 159%type <value> Expression 160 161%token <op> EXPOP_EOF 162%token <op> EXPOP_NEW_LINE 163%token <op> EXPOP_NUMBER 164%token <op> EXPOP_HEX_NUMBER 165%token <op> EXPOP_DECIMAL_NUMBER 166%token <op> EXPOP_LABEL 167%token <op> EXPOP_PAREN_OPEN 168%token <op> EXPOP_PAREN_CLOSE 169 170%left <op> EXPOP_LOGICAL_OR 171%left <op> EXPOP_LOGICAL_AND 172%left <op> EXPOP_OR 173%left <op> EXPOP_XOR 174%left <op> EXPOP_AND 175%left <op> EXPOP_EQUAL EXPOP_NOT_EQUAL 176%left <op> EXPOP_GREATER EXPOP_LESS EXPOP_GREATER_EQUAL EXPOP_LESS_EQUAL 177%left <op> EXPOP_SHIFT_RIGHT EXPOP_SHIFT_LEFT 178%left <op> EXPOP_ADD EXPOP_SUBTRACT 179%left <op> EXPOP_MULTIPLY EXPOP_DIVIDE EXPOP_MODULO 180%right <op> EXPOP_ONES_COMPLIMENT EXPOP_LOGICAL_NOT 181 182%% 183 184/* 185 * Operator precedence rules (from K&R) 186 * 187 * 1) ( ) 188 * 2) ! ~ (unary operators that are supported here) 189 * 3) * / % 190 * 4) + - 191 * 5) >> << 192 * 6) < > <= >= 193 * 7) == != 194 * 8) & 195 * 9) ^ 196 * 10) | 197 * 11) && 198 * 12) || 199 */ 200Value 201 : Expression EXPOP_NEW_LINE { DtParserResult=$1; return 0; } /* End of line (newline) */ 202 | Expression EXPOP_EOF { DtParserResult=$1; return 0; } /* End of string (0) */ 203 ; 204 205Expression 206 207 /* Unary operators */ 208 209 : EXPOP_LOGICAL_NOT Expression { $$ = DtDoOperator ($2, EXPOP_LOGICAL_NOT, $2);} 210 | EXPOP_ONES_COMPLIMENT Expression { $$ = DtDoOperator ($2, EXPOP_ONES_COMPLIMENT, $2);} 211 212 /* Binary operators */ 213 214 | Expression EXPOP_MULTIPLY Expression { $$ = DtDoOperator ($1, EXPOP_MULTIPLY, $3);} 215 | Expression EXPOP_DIVIDE Expression { $$ = DtDoOperator ($1, EXPOP_DIVIDE, $3);} 216 | Expression EXPOP_MODULO Expression { $$ = DtDoOperator ($1, EXPOP_MODULO, $3);} 217 | Expression EXPOP_ADD Expression { $$ = DtDoOperator ($1, EXPOP_ADD, $3);} 218 | Expression EXPOP_SUBTRACT Expression { $$ = DtDoOperator ($1, EXPOP_SUBTRACT, $3);} 219 | Expression EXPOP_SHIFT_RIGHT Expression { $$ = DtDoOperator ($1, EXPOP_SHIFT_RIGHT, $3);} 220 | Expression EXPOP_SHIFT_LEFT Expression { $$ = DtDoOperator ($1, EXPOP_SHIFT_LEFT, $3);} 221 | Expression EXPOP_GREATER Expression { $$ = DtDoOperator ($1, EXPOP_GREATER, $3);} 222 | Expression EXPOP_LESS Expression { $$ = DtDoOperator ($1, EXPOP_LESS, $3);} 223 | Expression EXPOP_GREATER_EQUAL Expression { $$ = DtDoOperator ($1, EXPOP_GREATER_EQUAL, $3);} 224 | Expression EXPOP_LESS_EQUAL Expression { $$ = DtDoOperator ($1, EXPOP_LESS_EQUAL, $3);} 225 | Expression EXPOP_EQUAL Expression { $$ = DtDoOperator ($1, EXPOP_EQUAL, $3);} 226 | Expression EXPOP_NOT_EQUAL Expression { $$ = DtDoOperator ($1, EXPOP_NOT_EQUAL, $3);} 227 | Expression EXPOP_AND Expression { $$ = DtDoOperator ($1, EXPOP_AND, $3);} 228 | Expression EXPOP_XOR Expression { $$ = DtDoOperator ($1, EXPOP_XOR, $3);} 229 | Expression EXPOP_OR Expression { $$ = DtDoOperator ($1, EXPOP_OR, $3);} 230 | Expression EXPOP_LOGICAL_AND Expression { $$ = DtDoOperator ($1, EXPOP_LOGICAL_AND, $3);} 231 | Expression EXPOP_LOGICAL_OR Expression { $$ = DtDoOperator ($1, EXPOP_LOGICAL_OR, $3);} 232 233 /* Parentheses: '(' Expression ')' */ 234 235 | EXPOP_PAREN_OPEN Expression 236 EXPOP_PAREN_CLOSE { $$ = $2;} 237 238 /* Label references (prefixed with $) */ 239 240 | EXPOP_LABEL { $$ = DtResolveLabel (DtParsertext);} 241 242 /* Default base for a non-prefixed integer is 16 */ 243 244 | EXPOP_NUMBER { AcpiUtStrtoul64 (DtParsertext, 16, ACPI_MAX64_BYTE_WIDTH, &$$);} 245 246 /* Standard hex number (0x1234) */ 247 248 | EXPOP_HEX_NUMBER { AcpiUtStrtoul64 (DtParsertext, 16, ACPI_MAX64_BYTE_WIDTH, &$$);} 249 250 /* TBD: Decimal number with prefix (0d1234) - Not supported by strtoul64 at this time */ 251 252 | EXPOP_DECIMAL_NUMBER { AcpiUtStrtoul64 (DtParsertext, 10, ACPI_MAX64_BYTE_WIDTH, &$$);} 253 ; 254%% 255 256/*! [End] no source code translation !*/ 257 258/* 259 * Local support functions, including parser entry point 260 */ 261#define PR_FIRST_PARSE_OPCODE EXPOP_EOF 262#define PR_YYTNAME_START 3 263 264 265/****************************************************************************** 266 * 267 * FUNCTION: DtParsererror 268 * 269 * PARAMETERS: Message - Parser-generated error message 270 * 271 * RETURN: None 272 * 273 * DESCRIPTION: Handler for parser errors 274 * 275 *****************************************************************************/ 276 277void 278DtParsererror ( 279 char const *Message) 280{ 281 DtError (ASL_ERROR, ASL_MSG_SYNTAX, 282 Gbl_CurrentField, (char *) Message); 283} 284 285 286/****************************************************************************** 287 * 288 * FUNCTION: DtGetOpName 289 * 290 * PARAMETERS: ParseOpcode - Parser token (EXPOP_*) 291 * 292 * RETURN: Pointer to the opcode name 293 * 294 * DESCRIPTION: Get the ascii name of the parse opcode for debug output 295 * 296 *****************************************************************************/ 297 298char * 299DtGetOpName ( 300 UINT32 ParseOpcode) 301{ 302#ifdef ASL_YYTNAME_START 303 /* 304 * First entries (PR_YYTNAME_START) in yytname are special reserved names. 305 * Ignore first 6 characters of name (EXPOP_) 306 */ 307 return ((char *) yytname 308 [(ParseOpcode - PR_FIRST_PARSE_OPCODE) + PR_YYTNAME_START] + 6); 309#else 310 return ("[Unknown parser generator]"); 311#endif 312} 313 314 315/****************************************************************************** 316 * 317 * FUNCTION: DtEvaluateExpression 318 * 319 * PARAMETERS: ExprString - Expression to be evaluated. Must be 320 * terminated by either a newline or a NUL 321 * string terminator 322 * 323 * RETURN: 64-bit value for the expression 324 * 325 * DESCRIPTION: Main entry point for the DT expression parser 326 * 327 *****************************************************************************/ 328 329UINT64 330DtEvaluateExpression ( 331 char *ExprString) 332{ 333 334 DbgPrint (ASL_DEBUG_OUTPUT, 335 "**** Input expression: %s (Base 16)\n", ExprString); 336 337 /* Point lexer to the input string */ 338 339 if (DtInitLexer (ExprString)) 340 { 341 DtError (ASL_ERROR, ASL_MSG_COMPILER_INTERNAL, 342 Gbl_CurrentField, "Could not initialize lexer"); 343 return (0); 344 } 345 346 /* Parse/Evaluate the input string (value returned in DtParserResult) */ 347 348 DtParserparse (); 349 DtTerminateLexer (); 350 351 DbgPrint (ASL_DEBUG_OUTPUT, 352 "**** Parser returned value: %u (%8.8X%8.8X)\n", 353 (UINT32) DtParserResult, ACPI_FORMAT_UINT64 (DtParserResult)); 354 355 return (DtParserResult); 356} 357