1 /******************************************************************************
2 *
3 * Module Name: acfileio - Get ACPI tables from file
4 *
5 *****************************************************************************/
6
7 /******************************************************************************
8 *
9 * 1. Copyright Notice
10 *
11 * Some or all of this work - Copyright (c) 1999 - 2026, 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 <contrib/dev/acpica/include/acpi.h>
153 #include <contrib/dev/acpica/include/accommon.h>
154 #include <contrib/dev/acpica/include/actables.h>
155 #include <contrib/dev/acpica/include/acutils.h>
156 #include <contrib/dev/acpica/include/acapps.h>
157
158 #define _COMPONENT ACPI_UTILITIES
159 ACPI_MODULE_NAME ("acfileio")
160
161
162 /* Local prototypes */
163
164 static ACPI_STATUS
165 AcGetOneTableFromFile (
166 char *Filename,
167 FILE *File,
168 UINT8 GetOnlyAmlTables,
169 ACPI_TABLE_HEADER **Table);
170
171 static ACPI_STATUS
172 AcCheckTextModeCorruption (
173 ACPI_TABLE_HEADER *Table);
174
175
176 /*******************************************************************************
177 *
178 * FUNCTION: AcDeleteTableList
179 *
180 * PARAMETERS: ListHead - List to delete
181 *
182 * RETURN: Status
183 *
184 * DESCRIPTION: Delete a list of tables. This is useful for removing memory
185 * allocated by AcGetAllTablesFromFile
186 *
187 ******************************************************************************/
188
189 void
AcDeleteTableList(ACPI_NEW_TABLE_DESC * ListHead)190 AcDeleteTableList (
191 ACPI_NEW_TABLE_DESC *ListHead)
192 {
193 ACPI_NEW_TABLE_DESC *Current = ListHead;
194 ACPI_NEW_TABLE_DESC *Previous = Current;
195
196
197 while (Current)
198 {
199 Current = Current->Next;
200 AcpiOsFree (Previous);
201 Previous = Current;
202 }
203 }
204
205
206 /*******************************************************************************
207 *
208 * FUNCTION: AcGetAllTablesFromFile
209 *
210 * PARAMETERS: Filename - Table filename
211 * GetOnlyAmlTables - TRUE if the tables must be AML tables
212 * ReturnListHead - Where table list is returned
213 *
214 * RETURN: Status
215 *
216 * DESCRIPTION: Get all ACPI tables from within a single file.
217 *
218 ******************************************************************************/
219
220 ACPI_STATUS
AcGetAllTablesFromFile(char * Filename,UINT8 GetOnlyAmlTables,ACPI_NEW_TABLE_DESC ** ReturnListHead)221 AcGetAllTablesFromFile (
222 char *Filename,
223 UINT8 GetOnlyAmlTables,
224 ACPI_NEW_TABLE_DESC **ReturnListHead)
225 {
226 ACPI_NEW_TABLE_DESC *ListHead = NULL;
227 ACPI_NEW_TABLE_DESC *ListTail = NULL;
228 ACPI_NEW_TABLE_DESC *TableDesc;
229 FILE *File;
230 ACPI_TABLE_HEADER *Table = NULL;
231 UINT32 FileSize;
232 ACPI_STATUS Status = AE_OK;
233
234
235 File = fopen (Filename, "rb");
236 if (!File)
237 {
238 fprintf (stderr, "Could not open input file: %s\n", Filename);
239 if (errno == ENOENT)
240 {
241 return (AE_NOT_EXIST);
242 }
243
244 return (AE_ERROR);
245 }
246
247 /* Get the file size */
248
249 FileSize = CmGetFileSize (File);
250 if (FileSize == ACPI_UINT32_MAX)
251 {
252 Status = AE_ERROR;
253 goto Exit;
254 }
255
256 fprintf (stderr,
257 "Input file %s, Length 0x%X (%u) bytes\n",
258 Filename, FileSize, FileSize);
259
260 /* We must have at least one ACPI table header */
261
262 if (FileSize < sizeof (ACPI_TABLE_HEADER))
263 {
264 Status = AE_BAD_HEADER;
265 goto Exit;
266 }
267
268 /* Check for an non-binary file */
269
270 if (!AcIsFileBinary (File))
271 {
272 fprintf (stderr,
273 " %s: File does not appear to contain a valid AML table\n",
274 Filename);
275 Status = AE_TYPE;
276 goto Exit;
277 }
278
279 /* Read all tables within the file */
280
281 while (ACPI_SUCCESS (Status))
282 {
283 /* Get one entire ACPI table */
284
285 Status = AcGetOneTableFromFile (
286 Filename, File, GetOnlyAmlTables, &Table);
287
288 if (Status == AE_CTRL_TERMINATE)
289 {
290 Status = AE_OK;
291 break;
292 }
293 else if (Status == AE_TYPE)
294 {
295 Status = AE_OK;
296 goto Exit;
297 }
298 else if (ACPI_FAILURE (Status))
299 {
300 goto Exit;
301 }
302
303 /* Print table header for iASL/disassembler only */
304
305 #ifdef ACPI_ASL_COMPILER
306
307 AcpiTbPrintTableHeader (0, Table);
308 #endif
309
310 /* Allocate and link a table descriptor */
311
312 TableDesc = AcpiOsAllocate (sizeof (ACPI_NEW_TABLE_DESC));
313 if (!TableDesc)
314 {
315 AcpiOsFree (Table);
316 Status = AE_NO_MEMORY;
317 goto Exit;
318 }
319
320 TableDesc->Table = Table;
321 TableDesc->Next = NULL;
322
323 /* Link at the end of the local table list */
324
325 if (!ListHead)
326 {
327 ListHead = TableDesc;
328 ListTail = TableDesc;
329 }
330 else
331 {
332 ListTail->Next = TableDesc;
333 ListTail = TableDesc;
334 }
335 }
336
337 /* Add the local table list to the end of the global list */
338
339 if (*ReturnListHead)
340 {
341 ListTail = *ReturnListHead;
342 while (ListTail->Next)
343 {
344 ListTail = ListTail->Next;
345 }
346
347 ListTail->Next = ListHead;
348 }
349 else
350 {
351 *ReturnListHead = ListHead;
352 }
353
354 Exit:
355 fclose(File);
356 return (Status);
357 }
358
359
360 /*******************************************************************************
361 *
362 * FUNCTION: AcGetOneTableFromFile
363 *
364 * PARAMETERS: Filename - File where table is located
365 * File - Open FILE pointer to Filename
366 * GetOnlyAmlTables - TRUE if the tables must be AML tables.
367 * ReturnTable - Where a pointer to the table is returned
368 *
369 * RETURN: Status
370 *
371 * DESCRIPTION: Read the next ACPI table from a file. Implements support
372 * for multiple tables within a single file. File must already
373 * be open.
374 *
375 * Note: Loading an RSDP is not supported.
376 *
377 ******************************************************************************/
378
379 static ACPI_STATUS
AcGetOneTableFromFile(char * Filename,FILE * File,UINT8 GetOnlyAmlTables,ACPI_TABLE_HEADER ** ReturnTable)380 AcGetOneTableFromFile (
381 char *Filename,
382 FILE *File,
383 UINT8 GetOnlyAmlTables,
384 ACPI_TABLE_HEADER **ReturnTable)
385 {
386 ACPI_STATUS Status = AE_OK;
387 ACPI_TABLE_HEADER TableHeader;
388 ACPI_TABLE_HEADER *Table;
389 INT32 Count;
390 UINT32 TableLength;
391 UINT32 HeaderLength;
392 long TableOffset = 0;
393
394 *ReturnTable = NULL;
395
396 /* Get the table header to examine signature and length */
397 /*
398 * Special handling for the CDAT table (both the Length field
399 * and the Checksum field are not in the standard positions).
400 * (The table header is non-standard).
401 */
402 if (AcpiGbl_CDAT)
403 {
404 HeaderLength = sizeof (ACPI_TABLE_CDAT);
405 }
406 else
407 {
408 HeaderLength = sizeof (ACPI_TABLE_HEADER);
409 }
410
411 Status = AcValidateTableHeader (File, TableOffset);
412 if (ACPI_FAILURE (Status))
413 {
414 return (Status);
415 }
416
417 TableOffset = ftell (File);
418 Count = fread (&TableHeader, 1, HeaderLength, File);
419 if (Count != (INT32) HeaderLength)
420 {
421 return (AE_CTRL_TERMINATE);
422 }
423
424 if (GetOnlyAmlTables)
425 {
426 /* Validate the table signature/header (limited ASCII chars) */
427
428 /*
429 * Table must be an AML table (DSDT/SSDT).
430 * Used for iASL -e option only.
431 */
432 if (!AcpiUtIsAmlTable (&TableHeader))
433 {
434 fprintf (stderr,
435 " %s: Table [%4.4s] is not an AML table - ignoring\n",
436 Filename, TableHeader.Signature);
437
438 return (AE_TYPE);
439 }
440 }
441
442 /*
443 * Special handling for the CDAT table (both the Length field
444 * and the Checksum field are not in the standard positions).
445 */
446 if (AcpiGbl_CDAT)
447 {
448 TableLength = ACPI_CAST_PTR (ACPI_TABLE_CDAT, &TableHeader)->Length;
449 }
450 else
451 {
452 TableLength = TableHeader.Length;
453 }
454
455 /* Table length must be at least large enough to hold the header */
456
457 if (TableLength < HeaderLength)
458 {
459 fprintf (stderr, "Table length too small for header: 0x%.2X\n",
460 TableLength);
461 return (AE_BAD_HEADER);
462 }
463
464 /* Allocate a buffer for the entire table */
465
466 Table = AcpiOsAllocate ((ACPI_SIZE) TableLength);
467 if (!Table)
468 {
469 return (AE_NO_MEMORY);
470 }
471
472 /* Read the entire ACPI table, including header */
473
474 fseek (File, TableOffset, SEEK_SET);
475 Count = fread (Table, 1, TableLength, File);
476
477 /*
478 * Checks for data table headers happen later in the execution. Only verify
479 * for Aml tables at this point in the code.
480 */
481 if (GetOnlyAmlTables && Count != (INT32) TableLength)
482 {
483 Status = AE_ERROR;
484 goto ErrorExit;
485 }
486
487 /*
488 * Validate the checksum (just issue a warning if incorrect).
489 * Note: CDAT is special cased here because the table does
490 * not have the checksum field in the standard position.
491 */
492 if (AcpiGbl_CDAT)
493 {
494 Status = AcpiUtVerifyCdatChecksum ((ACPI_TABLE_CDAT *) Table, TableLength);
495 } else
496 {
497 Status = AcpiUtVerifyChecksum (Table, TableLength);
498 }
499
500 if (ACPI_FAILURE (Status))
501 {
502 Status = AcCheckTextModeCorruption (Table);
503 if (ACPI_FAILURE (Status))
504 {
505 goto ErrorExit;
506 }
507 }
508
509 *ReturnTable = Table;
510 return (AE_OK);
511
512
513 ErrorExit:
514 AcpiOsFree (Table);
515 return (Status);
516 }
517
518
519 /*******************************************************************************
520 *
521 * FUNCTION: AcIsFileBinary
522 *
523 * PARAMETERS: File - Open input file
524 *
525 * RETURN: TRUE if file appears to be binary
526 *
527 * DESCRIPTION: Scan a file for any non-ASCII bytes.
528 *
529 * Note: Maintains current file position.
530 *
531 ******************************************************************************/
532
533 BOOLEAN
AcIsFileBinary(FILE * File)534 AcIsFileBinary (
535 FILE *File)
536 {
537 UINT8 Byte;
538 BOOLEAN IsBinary = FALSE;
539 long FileOffset;
540
541
542 /* Scan entire file for any non-ASCII bytes */
543
544 FileOffset = ftell (File);
545 while (fread (&Byte, 1, 1, File) == 1)
546 {
547 if (!isprint (Byte) && !isspace (Byte))
548 {
549 IsBinary = TRUE;
550 goto Exit;
551 }
552 }
553
554 Exit:
555 fseek (File, FileOffset, SEEK_SET);
556 return (IsBinary);
557 }
558
559
560 /*******************************************************************************
561 *
562 * FUNCTION: AcValidateTableHeader
563 *
564 * PARAMETERS: File - Open input file
565 *
566 * RETURN: Status
567 *
568 * DESCRIPTION: Determine if a file seems to contain one or more binary ACPI
569 * tables, via the
570 * following checks on what would be the table header:
571 * 1) File must be at least as long as an ACPI_TABLE_HEADER
572 * 2) There must be enough room in the file to hold entire table
573 * 3) Signature, OemId, OemTableId, AslCompilerId must be ASCII
574 *
575 * Note: There can be multiple definition blocks per file, so we cannot
576 * expect/compare the file size to be equal to the table length. 12/2015.
577 *
578 * Note: Maintains current file position.
579 *
580 ******************************************************************************/
581
582 ACPI_STATUS
AcValidateTableHeader(FILE * File,long TableOffset)583 AcValidateTableHeader (
584 FILE *File,
585 long TableOffset)
586 {
587 ACPI_TABLE_HEADER TableHeader;
588 ACPI_TABLE_CDAT *CdatTableHeader = ACPI_CAST_PTR (ACPI_TABLE_CDAT, &TableHeader);
589 UINT32 HeaderLength;
590 ACPI_SIZE Actual;
591 long OriginalOffset;
592 UINT32 FileSize;
593 UINT32 i;
594
595
596 ACPI_FUNCTION_TRACE (AcValidateTableHeader);
597
598 /* Determine the type of table header */
599
600 if (AcpiGbl_CDAT)
601 {
602 HeaderLength = sizeof (ACPI_TABLE_CDAT);
603 }
604 else
605 {
606 HeaderLength = sizeof (ACPI_TABLE_HEADER);
607 }
608
609 /* Read a potential table header */
610
611 OriginalOffset = ftell (File);
612 if (fseek (File, TableOffset, SEEK_SET))
613 {
614 fprintf (stderr, "SEEK error\n");
615 }
616 Actual = fread (&TableHeader, 1, HeaderLength, File);
617 if (fseek (File, OriginalOffset, SEEK_SET))
618 {
619 fprintf (stderr, "SEEK error\n");
620 }
621
622 if (Actual < HeaderLength)
623 {
624 fprintf (stderr,
625 "Could not read entire table header: Actual %u, Requested %u\n",
626 (UINT32) Actual, HeaderLength);
627 return (AE_ERROR);
628 }
629
630 /* Validate the signature (limited ASCII chars) */
631
632 if (!AcpiGbl_CDAT && !AcpiUtValidNameseg (TableHeader.Signature))
633 {
634 /*
635 * The "-ds cdat" option was not used, and the signature is not valid.
636 *
637 * For CDAT we are assuming that there should be at least one non-ASCII
638 * byte in the (normally) 4-character Signature field (at least the
639 * high-order byte should be zero). Otherwise, this is OK.
640 */
641 fprintf (stderr,
642 "\nTable appears to be a CDAT table, which has no signature.\n"
643 "If this is in fact a CDAT table, use the -ds option on the\n"
644 "command line to specify the table type (signature):\n"
645 "\"iasl -d -ds CDAT <file>\" or \"iasl -ds CDAT -T CDAT\"\n\n");
646
647 return (AE_BAD_SIGNATURE);
648 }
649
650 /* Validate table length against bytes remaining in the file */
651
652 FileSize = CmGetFileSize (File);
653 if (!AcpiGbl_CDAT)
654 {
655 /* Standard ACPI table header */
656
657 if (TableHeader.Length > (UINT32) (FileSize - TableOffset))
658 {
659 fprintf (stderr, "Table [%4.4s] is too long for file - "
660 "needs: 0x%.2X, remaining in file: 0x%.2X\n",
661 TableHeader.Signature, TableHeader.Length,
662 (UINT32) (FileSize - TableOffset));
663 return (AE_BAD_HEADER);
664 }
665 }
666 else if (CdatTableHeader->Length > (UINT32) (FileSize - TableOffset))
667 {
668 /* Special header for CDAT table */
669
670 fprintf (stderr, "Table [CDAT] is too long for file - "
671 "needs: 0x%.2X, remaining in file: 0x%.2X\n",
672 CdatTableHeader->Length,
673 (UINT32) (FileSize - TableOffset));
674 return (AE_BAD_HEADER);
675 }
676
677 /* For CDAT table, there are no ASCII fields in the header, we are done */
678
679 if (AcpiGbl_CDAT)
680 {
681 return (AE_OK);
682 }
683
684 /*
685 * These standard fields must be ASCII: OemId, OemTableId, AslCompilerId.
686 * We allow a NULL terminator in OemId and OemTableId.
687 */
688 for (i = 0; i < ACPI_NAMESEG_SIZE; i++)
689 {
690 if (!ACPI_IS_ASCII ((UINT8) TableHeader.AslCompilerId[i]))
691 {
692 goto BadCharacters;
693 }
694 }
695
696 for (i = 0; (i < ACPI_OEM_ID_SIZE) && (TableHeader.OemId[i]); i++)
697 {
698 if (!ACPI_IS_ASCII ((UINT8) TableHeader.OemId[i]))
699 {
700 goto BadCharacters;
701 }
702 }
703
704 for (i = 0; (i < ACPI_OEM_TABLE_ID_SIZE) && (TableHeader.OemTableId[i]); i++)
705 {
706 if (!ACPI_IS_ASCII ((UINT8) TableHeader.OemTableId[i]))
707 {
708 goto BadCharacters;
709 }
710 }
711
712 return (AE_OK);
713
714
715 BadCharacters:
716
717 ACPI_WARNING ((AE_INFO,
718 "Table header for [%4.4s] has invalid ASCII character(s)",
719 TableHeader.Signature));
720 return (AE_OK);
721 }
722
723
724 /*******************************************************************************
725 *
726 * FUNCTION: AcCheckTextModeCorruption
727 *
728 * PARAMETERS: Table - Table buffer starting with table header
729 *
730 * RETURN: Status
731 *
732 * DESCRIPTION: Check table for text mode file corruption where all linefeed
733 * characters (LF) have been replaced by carriage return linefeed
734 * pairs (CR/LF).
735 *
736 ******************************************************************************/
737
738 static ACPI_STATUS
AcCheckTextModeCorruption(ACPI_TABLE_HEADER * Table)739 AcCheckTextModeCorruption (
740 ACPI_TABLE_HEADER *Table)
741 {
742 UINT32 i;
743 UINT32 Pairs = 0;
744 UINT8 *Buffer = ACPI_CAST_PTR (UINT8, Table);
745
746
747 /* Scan entire table to determine if each LF has been prefixed with a CR */
748
749 for (i = 1; i < Table->Length; i++)
750 {
751 if (Buffer[i] == 0x0A)
752 {
753 if (Buffer[i - 1] != 0x0D)
754 {
755 /* The LF does not have a preceding CR, table not corrupted */
756
757 return (AE_OK);
758 }
759 else
760 {
761 /* Found a CR/LF pair */
762
763 Pairs++;
764 }
765
766 i++;
767 }
768 }
769
770 if (!Pairs)
771 {
772 return (AE_OK);
773 }
774
775 /*
776 * Entire table scanned, each CR is part of a CR/LF pair --
777 * meaning that the table was treated as a text file somewhere.
778 *
779 * NOTE: We can't "fix" the table, because any existing CR/LF pairs in the
780 * original table are left untouched by the text conversion process --
781 * meaning that we cannot simply replace CR/LF pairs with LFs.
782 */
783 AcpiOsPrintf ("Table has been corrupted by text mode conversion\n");
784 AcpiOsPrintf ("All LFs (%u) were changed to CR/LF pairs\n", Pairs);
785 AcpiOsPrintf ("Table cannot be repaired!\n");
786
787 return (AE_BAD_VALUE);
788 }
789