1 /****************************************************************************** 2 * 3 * Module Name: prexpress - Preprocessor #if expression support 4 * 5 *****************************************************************************/ 6 7 /****************************************************************************** 8 * 9 * 1. Copyright Notice 10 * 11 * Some or all of this work - Copyright (c) 1999 - 2018, Intel Corp. 12 * All rights reserved. 13 * 14 * 2. License 15 * 16 * 2.1. This is your license from Intel Corp. under its intellectual property 17 * rights. You may have additional license terms from the party that provided 18 * you this software, covering your right to use that party's intellectual 19 * property rights. 20 * 21 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a 22 * copy of the source code appearing in this file ("Covered Code") an 23 * irrevocable, perpetual, worldwide license under Intel's copyrights in the 24 * base code distributed originally by Intel ("Original Intel Code") to copy, 25 * make derivatives, distribute, use and display any portion of the Covered 26 * Code in any form, with the right to sublicense such rights; and 27 * 28 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent 29 * license (with the right to sublicense), under only those claims of Intel 30 * patents that are infringed by the Original Intel Code, to make, use, sell, 31 * offer to sell, and import the Covered Code and derivative works thereof 32 * solely to the minimum extent necessary to exercise the above copyright 33 * license, and in no event shall the patent license extend to any additions 34 * to or modifications of the Original Intel Code. No other license or right 35 * is granted directly or by implication, estoppel or otherwise; 36 * 37 * The above copyright and patent license is granted only if the following 38 * conditions are met: 39 * 40 * 3. Conditions 41 * 42 * 3.1. Redistribution of Source with Rights to Further Distribute Source. 43 * Redistribution of source code of any substantial portion of the Covered 44 * Code or modification with rights to further distribute source must include 45 * the above Copyright Notice, the above License, this list of Conditions, 46 * and the following Disclaimer and Export Compliance provision. In addition, 47 * Licensee must cause all Covered Code to which Licensee contributes to 48 * contain a file documenting the changes Licensee made to create that Covered 49 * Code and the date of any change. Licensee must include in that file the 50 * documentation of any changes made by any predecessor Licensee. Licensee 51 * must include a prominent statement that the modification is derived, 52 * directly or indirectly, from Original Intel Code. 53 * 54 * 3.2. Redistribution of Source with no Rights to Further Distribute Source. 55 * Redistribution of source code of any substantial portion of the Covered 56 * Code or modification without rights to further distribute source must 57 * include the following Disclaimer and Export Compliance provision in the 58 * documentation and/or other materials provided with distribution. In 59 * addition, Licensee may not authorize further sublicense of source of any 60 * portion of the Covered Code, and must include terms to the effect that the 61 * license from Licensee to its licensee is limited to the intellectual 62 * property embodied in the software Licensee provides to its licensee, and 63 * not to intellectual property embodied in modifications its licensee may 64 * make. 65 * 66 * 3.3. Redistribution of Executable. Redistribution in executable form of any 67 * substantial portion of the Covered Code or modification must reproduce the 68 * above Copyright Notice, and the following Disclaimer and Export Compliance 69 * provision in the documentation and/or other materials provided with the 70 * distribution. 71 * 72 * 3.4. Intel retains all right, title, and interest in and to the Original 73 * Intel Code. 74 * 75 * 3.5. Neither the name Intel nor any other trademark owned or controlled by 76 * Intel shall be used in advertising or otherwise to promote the sale, use or 77 * other dealings in products derived from or relating to the Covered Code 78 * without prior written authorization from Intel. 79 * 80 * 4. Disclaimer and Export Compliance 81 * 82 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED 83 * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE 84 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, 85 * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY 86 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY 87 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A 88 * PARTICULAR PURPOSE. 89 * 90 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES 91 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR 92 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, 93 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY 94 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL 95 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS 96 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY 97 * LIMITED REMEDY. 98 * 99 * 4.3. Licensee shall not export, either directly or indirectly, any of this 100 * software or system incorporating such software without first obtaining any 101 * required license or other approval from the U. S. Department of Commerce or 102 * any other agency or department of the United States Government. In the 103 * event Licensee exports any such software from the United States or 104 * re-exports any such software from a foreign destination, Licensee shall 105 * ensure that the distribution and export/re-export of the software is in 106 * compliance with all laws, regulations, orders, or other restrictions of the 107 * U.S. Export Administration Regulations. Licensee agrees that neither it nor 108 * any of its subsidiaries will export/re-export any technical data, process, 109 * software, or service, directly or indirectly, to any country for which the 110 * United States government or any agency thereof requires an export license, 111 * other governmental approval, or letter of assurance, without first obtaining 112 * such license, approval or letter. 113 * 114 ***************************************************************************** 115 * 116 * Alternatively, you may choose to be licensed under the terms of the 117 * following license: 118 * 119 * Redistribution and use in source and binary forms, with or without 120 * modification, are permitted provided that the following conditions 121 * are met: 122 * 1. Redistributions of source code must retain the above copyright 123 * notice, this list of conditions, and the following disclaimer, 124 * without modification. 125 * 2. Redistributions in binary form must reproduce at minimum a disclaimer 126 * substantially similar to the "NO WARRANTY" disclaimer below 127 * ("Disclaimer") and any redistribution must be conditioned upon 128 * including a substantially similar Disclaimer requirement for further 129 * binary redistribution. 130 * 3. Neither the names of the above-listed copyright holders nor the names 131 * of any contributors may be used to endorse or promote products derived 132 * from this software without specific prior written permission. 133 * 134 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 135 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 136 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 137 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 138 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 139 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 140 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 141 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 142 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 143 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 144 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 145 * 146 * Alternatively, you may choose to be licensed under the terms of the 147 * GNU General Public License ("GPL") version 2 as published by the Free 148 * Software Foundation. 149 * 150 *****************************************************************************/ 151 152 #include "aslcompiler.h" 153 154 #define _COMPONENT ASL_PREPROCESSOR 155 ACPI_MODULE_NAME ("prexpress") 156 157 /* Local prototypes */ 158 159 static char * 160 PrExpandMacros ( 161 char *Line); 162 163 164 #ifdef _UNDER_DEVELOPMENT 165 /****************************************************************************** 166 * 167 * FUNCTION: PrUnTokenize 168 * 169 * PARAMETERS: Buffer - Token Buffer 170 * Next - "Next" buffer from GetNextToken 171 * 172 * RETURN: None 173 * 174 * DESCRIPTION: Un-tokenized the current token buffer. The implementation is 175 * to simply set the null inserted by GetNextToken to a blank. 176 * If Next is NULL, there were no tokens found in the Buffer, 177 * so there is nothing to do. 178 * 179 *****************************************************************************/ 180 181 static void 182 PrUnTokenize ( 183 char *Buffer, 184 char *Next) 185 { 186 UINT32 Length = strlen (Buffer); 187 188 189 if (!Next) 190 { 191 return; 192 } 193 194 if (Buffer[Length] != '\n') 195 { 196 Buffer[strlen(Buffer)] = ' '; 197 } 198 } 199 #endif 200 201 202 /****************************************************************************** 203 * 204 * FUNCTION: PrExpandMacros 205 * 206 * PARAMETERS: Line - Pointer into the current line 207 * 208 * RETURN: Updated pointer into the current line 209 * 210 * DESCRIPTION: Expand any macros found in the current line buffer. 211 * 212 *****************************************************************************/ 213 214 static char * 215 PrExpandMacros ( 216 char *Line) 217 { 218 char *Token; 219 char *ReplaceString; 220 PR_DEFINE_INFO *DefineInfo; 221 ACPI_SIZE TokenOffset; 222 char *Next; 223 int OffsetAdjust; 224 225 226 strcpy (Gbl_ExpressionTokenBuffer, Gbl_CurrentLineBuffer); 227 Token = PrGetNextToken (Gbl_ExpressionTokenBuffer, PR_EXPR_SEPARATORS, &Next); 228 OffsetAdjust = 0; 229 230 while (Token) 231 { 232 DefineInfo = PrMatchDefine (Token); 233 if (DefineInfo) 234 { 235 if (DefineInfo->Body) 236 { 237 /* This is a macro. TBD: Is this allowed? */ 238 239 DbgPrint (ASL_DEBUG_OUTPUT, PR_PREFIX_ID 240 "Matched Macro: %s->%s\n", 241 Gbl_CurrentLineNumber, DefineInfo->Identifier, 242 DefineInfo->Replacement); 243 244 PrDoMacroInvocation (Gbl_ExpressionTokenBuffer, Token, 245 DefineInfo, &Next); 246 } 247 else 248 { 249 ReplaceString = DefineInfo->Replacement; 250 251 /* Replace the name in the original line buffer */ 252 253 TokenOffset = Token - Gbl_ExpressionTokenBuffer + OffsetAdjust; 254 PrReplaceData ( 255 &Gbl_CurrentLineBuffer[TokenOffset], strlen (Token), 256 ReplaceString, strlen (ReplaceString)); 257 258 /* Adjust for length difference between old and new name length */ 259 260 OffsetAdjust += strlen (ReplaceString) - strlen (Token); 261 262 DbgPrint (ASL_DEBUG_OUTPUT, PR_PREFIX_ID 263 "Matched #define within expression: %s->%s\n", 264 Gbl_CurrentLineNumber, Token, 265 *ReplaceString ? ReplaceString : "(NULL STRING)"); 266 } 267 } 268 269 Token = PrGetNextToken (NULL, PR_EXPR_SEPARATORS, &Next); 270 } 271 272 return (Line); 273 } 274 275 276 /****************************************************************************** 277 * 278 * FUNCTION: PrIsDefined 279 * 280 * PARAMETERS: Identifier - Name to be resolved 281 * 282 * RETURN: 64-bit boolean integer value 283 * 284 * DESCRIPTION: Returns TRUE if the name is defined, FALSE otherwise (0). 285 * 286 *****************************************************************************/ 287 288 UINT64 289 PrIsDefined ( 290 char *Identifier) 291 { 292 UINT64 Value; 293 PR_DEFINE_INFO *DefineInfo; 294 295 296 DbgPrint (ASL_DEBUG_OUTPUT, PR_PREFIX_ID 297 "**** Is defined?: %s\n", Gbl_CurrentLineNumber, Identifier); 298 299 Value = 0; /* Default is "Not defined" -- FALSE */ 300 301 DefineInfo = PrMatchDefine (Identifier); 302 if (DefineInfo) 303 { 304 Value = ACPI_UINT64_MAX; /* TRUE */ 305 } 306 307 DbgPrint (ASL_DEBUG_OUTPUT, PR_PREFIX_ID 308 "[#if defined %s] resolved to: %8.8X%8.8X\n", 309 Gbl_CurrentLineNumber, Identifier, ACPI_FORMAT_UINT64 (Value)); 310 311 return (Value); 312 } 313 314 315 /****************************************************************************** 316 * 317 * FUNCTION: PrResolveDefine 318 * 319 * PARAMETERS: Identifier - Name to be resolved 320 * 321 * RETURN: A 64-bit boolean integer value 322 * 323 * DESCRIPTION: Returns TRUE if the name is defined, FALSE otherwise (0). 324 * 325 *****************************************************************************/ 326 327 UINT64 328 PrResolveDefine ( 329 char *Identifier) 330 { 331 UINT64 Value; 332 PR_DEFINE_INFO *DefineInfo; 333 334 335 DbgPrint (ASL_DEBUG_OUTPUT, PR_PREFIX_ID 336 "**** Resolve #define: %s\n", Gbl_CurrentLineNumber, Identifier); 337 338 Value = 0; /* Default is "Not defined" -- FALSE */ 339 340 DefineInfo = PrMatchDefine (Identifier); 341 if (DefineInfo) 342 { 343 Value = ACPI_UINT64_MAX; /* TRUE */ 344 } 345 346 DbgPrint (ASL_DEBUG_OUTPUT, PR_PREFIX_ID 347 "[#if defined %s] resolved to: %8.8X%8.8X\n", 348 Gbl_CurrentLineNumber, Identifier, ACPI_FORMAT_UINT64 (Value)); 349 350 return (Value); 351 } 352 353 354 /****************************************************************************** 355 * 356 * FUNCTION: PrResolveIntegerExpression 357 * 358 * PARAMETERS: Line - Pointer to integer expression 359 * ReturnValue - Where the resolved 64-bit integer is 360 * returned. 361 * 362 * RETURN: Status 363 * 364 * DESCRIPTION: Resolve an integer expression to a single value. Supports 365 * both integer constants and labels. 366 * 367 *****************************************************************************/ 368 369 ACPI_STATUS 370 PrResolveIntegerExpression ( 371 char *Line, 372 UINT64 *ReturnValue) 373 { 374 UINT64 Result; 375 char *ExpandedLine; 376 377 378 DbgPrint (ASL_DEBUG_OUTPUT, PR_PREFIX_ID 379 "**** Resolve #if: %s\n", Gbl_CurrentLineNumber, Line); 380 381 /* Expand all macros within the expression first */ 382 383 ExpandedLine = PrExpandMacros (Line); 384 385 /* Now we can evaluate the expression */ 386 387 Result = PrEvaluateExpression (ExpandedLine); 388 DbgPrint (ASL_DEBUG_OUTPUT, PR_PREFIX_ID 389 "**** Expression Resolved to: %8.8X%8.8X\n", 390 Gbl_CurrentLineNumber, ACPI_FORMAT_UINT64 (Result)); 391 392 *ReturnValue = Result; 393 return (AE_OK); 394 395 #if 0 396 InvalidExpression: 397 398 ACPI_FREE (EvalBuffer); 399 PrError (ASL_ERROR, ASL_MSG_INVALID_EXPRESSION, 0); 400 return (AE_ERROR); 401 402 403 NormalExit: 404 405 DbgPrint (ASL_DEBUG_OUTPUT, PR_PREFIX_ID 406 "**** Expression Resolved to: %8.8X%8.8X\n", 407 Gbl_CurrentLineNumber, ACPI_FORMAT_UINT64 (Value1)); 408 409 *ReturnValue = Value1; 410 return (AE_OK); 411 #endif 412 } 413