1 /****************************************************************************** 2 * 3 * Module Name: ahdecode - Miscellaneous decoding for acpihelp utility 4 * 5 *****************************************************************************/ 6 7 /****************************************************************************** 8 * 9 * 1. Copyright Notice 10 * 11 * Some or all of this work - Copyright (c) 1999 - 2019, 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 #define ACPI_CREATE_PREDEFINED_TABLE 153 #define ACPI_CREATE_RESOURCE_TABLE 154 155 #include "acpihelp.h" 156 #include "acpredef.h" 157 158 159 /* Local prototypes */ 160 161 static BOOLEAN 162 AhDisplayPredefinedName ( 163 char *Name, 164 UINT32 Length); 165 166 static void 167 AhDisplayPredefinedInfo ( 168 char *Name); 169 170 static void 171 AhDoSpecialNames ( 172 char *Name); 173 174 static void 175 AhDisplayResourceName ( 176 const ACPI_PREDEFINED_INFO *ThisName); 177 178 179 /******************************************************************************* 180 * 181 * FUNCTION: AhPrintOneField 182 * 183 * PARAMETERS: Indent - Indent length for new line(s) 184 * CurrentPosition - Position on current line 185 * MaxPosition - Max allowed line length 186 * Field - Data to output 187 * 188 * RETURN: Line position after field is written 189 * 190 * DESCRIPTION: Split long lines appropriately for ease of reading. 191 * 192 ******************************************************************************/ 193 194 void 195 AhPrintOneField ( 196 UINT32 Indent, 197 UINT32 CurrentPosition, 198 UINT32 MaxPosition, 199 const char *Field) 200 { 201 UINT32 Position; 202 UINT32 TokenLength; 203 const char *This; 204 const char *Next; 205 const char *Last; 206 207 208 This = Field; 209 Position = CurrentPosition; 210 211 if (Position == 0) 212 { 213 printf ("%*s", (int) Indent, " "); 214 Position = Indent; 215 } 216 217 Last = This + strlen (This); 218 while ((Next = strpbrk (This, " "))) 219 { 220 TokenLength = Next - This; 221 Position += TokenLength; 222 223 /* Split long lines */ 224 225 if (Position > MaxPosition) 226 { 227 printf ("\n%*s", (int) Indent, " "); 228 Position = TokenLength; 229 } 230 231 printf ("%.*s ", (int) TokenLength, This); 232 This = Next + 1; 233 } 234 235 /* Handle last token on the input line */ 236 237 TokenLength = Last - This; 238 if (TokenLength > 0) 239 { 240 Position += TokenLength; 241 if (Position > MaxPosition) 242 { 243 printf ("\n%*s", (int) Indent, " "); 244 } 245 246 printf ("%s", This); 247 } 248 } 249 250 251 /******************************************************************************* 252 * 253 * FUNCTION: AhDisplayDirectives 254 * 255 * PARAMETERS: None 256 * 257 * RETURN: None 258 * 259 * DESCRIPTION: Display all iASL preprocessor directives. 260 * 261 ******************************************************************************/ 262 263 void 264 AhDisplayDirectives ( 265 void) 266 { 267 const AH_DIRECTIVE_INFO *Info; 268 269 270 printf ("iASL Preprocessor Directives\n\n"); 271 272 for (Info = Gbl_PreprocessorDirectives; Info->Name; Info++) 273 { 274 printf (" %-36s : %s\n", Info->Name, Info->Description); 275 } 276 } 277 278 279 /******************************************************************************* 280 * 281 * FUNCTION: AhFindPredefinedNames (entry point for predefined name search) 282 * 283 * PARAMETERS: NamePrefix - Name or prefix to find. Must start with 284 * an underscore. NULL means "find all" 285 * 286 * RETURN: None 287 * 288 * DESCRIPTION: Find and display all ACPI predefined names that match the 289 * input name or prefix. Includes the required number of arguments 290 * and the expected return type, if any. 291 * 292 ******************************************************************************/ 293 294 void 295 AhFindPredefinedNames ( 296 char *NamePrefix) 297 { 298 UINT32 Length; 299 BOOLEAN Found; 300 char Name[ACPI_NAMESEG_SIZE + 1]; 301 302 303 if (!NamePrefix || (*NamePrefix == '*')) 304 { 305 Found = AhDisplayPredefinedName (NULL, 0); 306 return; 307 } 308 309 Length = strlen (NamePrefix); 310 if (Length > ACPI_NAMESEG_SIZE) 311 { 312 printf ("%.8s: Predefined name must be 4 characters maximum\n", 313 NamePrefix); 314 return; 315 } 316 317 /* Construct a local name or name prefix */ 318 319 AcpiUtStrupr (NamePrefix); 320 if (*NamePrefix == '_') 321 { 322 NamePrefix++; 323 } 324 325 Name[0] = '_'; 326 AcpiUtSafeStrncpy (&Name[1], NamePrefix, 4); 327 328 /* Check for special names such as _Exx, _ACx, etc. */ 329 330 AhDoSpecialNames (Name); 331 332 /* Lookup and display the name(s) */ 333 334 Found = AhDisplayPredefinedName (Name, Length); 335 if (!Found) 336 { 337 printf ("%s, no matching predefined names\n", Name); 338 } 339 } 340 341 342 /******************************************************************************* 343 * 344 * FUNCTION: AhDoSpecialNames 345 * 346 * PARAMETERS: Name - Name or prefix to find 347 * 348 * RETURN: None 349 * 350 * DESCRIPTION: Detect and handle the "special" names such as _Exx, _ACx, etc. 351 * 352 * Current support: 353 * _EJx 354 * _Exx 355 * _Lxx 356 * _Qxx 357 * _Wxx 358 * _ACx 359 * _ALx 360 * _T_x 361 * 362 ******************************************************************************/ 363 364 static void 365 AhDoSpecialNames ( 366 char *Name) 367 { 368 369 /* 370 * Check for the special names that have one or more numeric 371 * suffixes. For example, _Lxx can have 256 different flavors, 372 * from _L00 to _LFF. 373 */ 374 switch (Name[1]) 375 { 376 case 'E': 377 if (Name[2] == 'J') 378 { 379 if (isdigit (Name[3]) || (Name[3] == 'X')) 380 { 381 /* _EJx */ 382 383 Name[3] = 'x'; 384 break; 385 } 386 } 387 388 /* Fallthrough */ 389 390 case 'L': 391 case 'Q': 392 case 'W': 393 if ((isxdigit (Name[2]) && isxdigit (Name[3])) 394 || 395 ((Name[2] == 'X') && (Name[3] == 'X'))) 396 { 397 /* _Exx, _Lxx, _Qxx, or _Wxx */ 398 399 Name[2] = 'x'; 400 Name[3] = 'x'; 401 } 402 break; 403 404 case 'A': 405 if ((Name[2] == 'C') || (Name[2] == 'L')) 406 { 407 if (isdigit (Name[3]) || (Name[3] == 'X')) 408 { 409 /* _ACx or _ALx */ 410 411 Name[3] = 'x'; 412 } 413 } 414 break; 415 416 case 'T': 417 if (Name[2] == '_') 418 { 419 /* _T_x (Reserved for iASL compiler */ 420 421 Name[3] = 'x'; 422 } 423 break; 424 425 default: 426 break; 427 } 428 } 429 430 431 /******************************************************************************* 432 * 433 * FUNCTION: AhDisplayPredefinedName 434 * 435 * PARAMETERS: Name - Name or name prefix 436 * 437 * RETURN: TRUE if any names matched, FALSE otherwise 438 * 439 * DESCRIPTION: Display information about ACPI predefined names that match 440 * the input name or name prefix. 441 * 442 ******************************************************************************/ 443 444 static BOOLEAN 445 AhDisplayPredefinedName ( 446 char *Name, 447 UINT32 Length) 448 { 449 const AH_PREDEFINED_NAME *Info; 450 BOOLEAN Found = FALSE; 451 BOOLEAN Matched; 452 UINT32 i = 0; 453 454 455 /* Find/display all names that match the input name prefix */ 456 457 for (Info = AslPredefinedInfo; Info->Name; Info++) 458 { 459 if (!Name) 460 { 461 Found = TRUE; 462 printf ("%s: <%s>\n", Info->Name, Info->Description); 463 printf ("%*s%s\n", 6, " ", Info->Action); 464 465 AhDisplayPredefinedInfo (Info->Name); 466 i++; 467 continue; 468 } 469 470 Matched = TRUE; 471 for (i = 0; i < Length; i++) 472 { 473 if (Info->Name[i] != Name[i]) 474 { 475 Matched = FALSE; 476 break; 477 } 478 } 479 480 if (Matched) 481 { 482 Found = TRUE; 483 printf ("%s: <%s>\n", Info->Name, Info->Description); 484 printf ("%*s%s\n", 6, " ", Info->Action); 485 486 AhDisplayPredefinedInfo (Info->Name); 487 } 488 } 489 490 if (!Name) 491 { 492 printf ("\nFound %d Predefined ACPI Names\n", i); 493 } 494 return (Found); 495 } 496 497 498 /******************************************************************************* 499 * 500 * FUNCTION: AhDisplayPredefinedInfo 501 * 502 * PARAMETERS: Name - Exact 4-character ACPI name. 503 * 504 * RETURN: None 505 * 506 * DESCRIPTION: Find the name in the main ACPICA predefined info table and 507 * display the # of arguments and the return value type. 508 * 509 * Note: Resource Descriptor field names do not appear in this 510 * table -- thus, nothing will be displayed for them. 511 * 512 ******************************************************************************/ 513 514 static void 515 AhDisplayPredefinedInfo ( 516 char *Name) 517 { 518 const ACPI_PREDEFINED_INFO *ThisName; 519 520 521 /* NOTE: we check both tables always because there are some dupes */ 522 523 /* Check against the predefined methods first */ 524 525 ThisName = AcpiUtMatchPredefinedMethod (Name); 526 if (ThisName) 527 { 528 AcpiUtDisplayPredefinedMethod (Gbl_Buffer, ThisName, TRUE); 529 } 530 531 /* Check against the predefined resource descriptor names */ 532 533 ThisName = AcpiUtMatchResourceName (Name); 534 if (ThisName) 535 { 536 AhDisplayResourceName (ThisName); 537 } 538 } 539 540 541 /******************************************************************************* 542 * 543 * FUNCTION: AhDisplayResourceName 544 * 545 * PARAMETERS: ThisName - Entry in the predefined method/name table 546 * 547 * RETURN: None 548 * 549 * DESCRIPTION: Display information about a resource descriptor name. 550 * 551 ******************************************************************************/ 552 553 static void 554 AhDisplayResourceName ( 555 const ACPI_PREDEFINED_INFO *ThisName) 556 { 557 UINT32 NumTypes; 558 559 560 NumTypes = AcpiUtGetResourceBitWidth (Gbl_Buffer, 561 ThisName->Info.ArgumentList); 562 563 printf (" %4.4s resource descriptor field is %s bits wide%s\n", 564 ThisName->Info.Name, 565 Gbl_Buffer, 566 (NumTypes > 1) ? " (depending on descriptor type)" : ""); 567 } 568 569 570 /******************************************************************************* 571 * 572 * FUNCTION: AhDisplayDeviceIds 573 * 574 * PARAMETERS: Name - Device Hardware ID string. 575 * NULL means "find all" 576 * 577 * RETURN: None 578 * 579 * DESCRIPTION: Display PNP* and ACPI* device IDs. 580 * 581 ******************************************************************************/ 582 583 void 584 AhDisplayDeviceIds ( 585 char *Name) 586 { 587 const AH_DEVICE_ID *Info; 588 UINT32 Length; 589 BOOLEAN Matched; 590 UINT32 i; 591 BOOLEAN Found = FALSE; 592 593 594 /* Null input name indicates "display all" */ 595 596 if (!Name || (Name[0] == '*')) 597 { 598 printf ("ACPI and PNP Device/Hardware IDs:\n\n"); 599 for (Info = AslDeviceIds; Info->Name; Info++) 600 { 601 printf ("%8s %s\n", Info->Name, Info->Description); 602 } 603 604 return; 605 } 606 607 Length = strlen (Name); 608 if (Length > 8) 609 { 610 printf ("%.8s: Hardware ID must be 8 characters maximum\n", Name); 611 return; 612 } 613 614 /* Find/display all names that match the input name prefix */ 615 616 AcpiUtStrupr (Name); 617 for (Info = AslDeviceIds; Info->Name; Info++) 618 { 619 Matched = TRUE; 620 for (i = 0; i < Length; i++) 621 { 622 if (Info->Name[i] != Name[i]) 623 { 624 Matched = FALSE; 625 break; 626 } 627 } 628 629 if (Matched) 630 { 631 Found = TRUE; 632 printf ("%8s %s\n", Info->Name, Info->Description); 633 } 634 } 635 636 if (!Found) 637 { 638 printf ("%s, Hardware ID not found\n", Name); 639 } 640 } 641 642 643 /******************************************************************************* 644 * 645 * FUNCTION: AhDisplayUuids 646 * 647 * PARAMETERS: None 648 * 649 * RETURN: None 650 * 651 * DESCRIPTION: Display all known UUIDs. 652 * 653 ******************************************************************************/ 654 655 void 656 AhDisplayUuids ( 657 void) 658 { 659 const AH_UUID *Info; 660 661 662 printf ("ACPI-related UUIDs/GUIDs:\n"); 663 664 /* Display entire table of known ACPI-related UUIDs/GUIDs */ 665 666 for (Info = Gbl_AcpiUuids; Info->Description; Info++) 667 { 668 if (!Info->String) /* Null UUID string means group description */ 669 { 670 printf ("\n%36s\n", Info->Description); 671 } 672 else 673 { 674 printf ("%32s : %s\n", Info->Description, Info->String); 675 } 676 } 677 678 /* Help info on how UUIDs/GUIDs strings are encoded */ 679 680 printf ("\n\nByte encoding of UUID/GUID strings" 681 " into ACPI Buffer objects (use ToUUID from ASL):\n\n"); 682 683 printf ("%32s : %s\n", "Input UUID/GUID String format", 684 "aabbccdd-eeff-gghh-iijj-kkllmmnnoopp"); 685 686 printf ("%32s : %s\n", "Expected output ACPI buffer", 687 "dd,cc,bb,aa, ff,ee, hh,gg, ii,jj, kk,ll,mm,nn,oo,pp"); 688 } 689 690 691 /******************************************************************************* 692 * 693 * FUNCTION: AhDisplayTables 694 * 695 * PARAMETERS: None 696 * 697 * RETURN: None 698 * 699 * DESCRIPTION: Display all known ACPI tables 700 * 701 ******************************************************************************/ 702 703 void 704 AhDisplayTables ( 705 void) 706 { 707 const AH_TABLE *Info; 708 UINT32 i = 0; 709 710 711 printf ("Known ACPI tables:\n"); 712 713 for (Info = AcpiGbl_SupportedTables; Info->Signature; Info++) 714 { 715 printf ("%8s : %s\n", Info->Signature, Info->Description); 716 i++; 717 } 718 719 printf ("\nTotal %u ACPI tables\n\n", i); 720 } 721 722 723 /******************************************************************************* 724 * 725 * FUNCTION: AhDecodeException 726 * 727 * PARAMETERS: HexString - ACPI status string from command line, in 728 * hex. If null, display all exceptions. 729 * 730 * RETURN: None 731 * 732 * DESCRIPTION: Decode and display an ACPI_STATUS exception code. 733 * 734 ******************************************************************************/ 735 736 void 737 AhDecodeException ( 738 char *HexString) 739 { 740 const ACPI_EXCEPTION_INFO *ExceptionInfo; 741 UINT32 Status; 742 UINT32 i; 743 744 745 /* 746 * A null input string means to decode and display all known 747 * exception codes. 748 */ 749 if (!HexString) 750 { 751 printf ("All defined ACPICA exception codes:\n\n"); 752 AH_DISPLAY_EXCEPTION (0, 753 "AE_OK (No error occurred)"); 754 755 /* Display codes in each block of exception types */ 756 757 for (i = 1; (i & AE_CODE_MASK) <= AE_CODE_MAX; i += 0x1000) 758 { 759 Status = i; 760 do 761 { 762 ExceptionInfo = AcpiUtValidateException ((ACPI_STATUS) Status); 763 if (ExceptionInfo) 764 { 765 AH_DISPLAY_EXCEPTION_TEXT (Status, ExceptionInfo); 766 } 767 768 Status++; 769 770 } while (ExceptionInfo); 771 } 772 return; 773 } 774 775 /* Decode a single user-supplied exception code */ 776 777 Status = strtoul (HexString, NULL, 16); 778 if (!Status) 779 { 780 printf ("%s: Invalid hexadecimal exception code value\n", HexString); 781 return; 782 } 783 784 if (Status > ACPI_UINT16_MAX) 785 { 786 AH_DISPLAY_EXCEPTION (Status, "Invalid exception code (more than 16 bits)"); 787 return; 788 } 789 790 ExceptionInfo = AcpiUtValidateException ((ACPI_STATUS) Status); 791 if (!ExceptionInfo) 792 { 793 AH_DISPLAY_EXCEPTION (Status, "Unknown exception code"); 794 return; 795 } 796 797 AH_DISPLAY_EXCEPTION_TEXT (Status, ExceptionInfo); 798 } 799