1 /******************************************************************************
3 * Module Name: acfileio - Get ACPI tables from file
5 *****************************************************************************/
8 * Copyright (C) 2000 - 2016, Intel Corp.
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24 * from this software without specific prior written permission.
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50 #define _COMPONENT ACPI_UTILITIES
51 ACPI_MODULE_NAME ("acfileio")
54 /* Local prototypes */
57 AcGetOneTableFromFile (
60 UINT8 GetOnlyAmlTables,
61 ACPI_TABLE_HEADER **Table);
64 AcCheckTextModeCorruption (
65 ACPI_TABLE_HEADER *Table);
68 /*******************************************************************************
70 * FUNCTION: AcGetAllTablesFromFile
72 * PARAMETERS: Filename - Table filename
73 * GetOnlyAmlTables - TRUE if the tables must be AML tables
74 * ReturnListHead - Where table list is returned
78 * DESCRIPTION: Get all ACPI tables from within a single file.
80 ******************************************************************************/
83 AcGetAllTablesFromFile (
85 UINT8 GetOnlyAmlTables,
86 ACPI_NEW_TABLE_DESC **ReturnListHead)
88 ACPI_NEW_TABLE_DESC *ListHead = NULL;
89 ACPI_NEW_TABLE_DESC *ListTail = NULL;
90 ACPI_NEW_TABLE_DESC *TableDesc;
92 ACPI_TABLE_HEADER *Table = NULL;
94 ACPI_STATUS Status = AE_OK;
97 File = fopen (Filename, "rb");
100 fprintf (stderr, "Could not open input file: %s\n", Filename);
103 return (AE_NOT_EXIST);
109 /* Get the file size */
111 FileSize = CmGetFileSize (File);
112 if (FileSize == ACPI_UINT32_MAX)
119 "Input file %s, Length 0x%X (%u) bytes\n",
120 Filename, FileSize, FileSize);
122 /* We must have at least one ACPI table header */
124 if (FileSize < sizeof (ACPI_TABLE_HEADER))
126 Status = AE_BAD_HEADER;
130 /* Check for an non-binary file */
132 if (!AcIsFileBinary (File))
135 " %s: File does not appear to contain a valid AML table\n",
140 /* Read all tables within the file */
142 while (ACPI_SUCCESS (Status))
144 /* Get one entire ACPI table */
146 Status = AcGetOneTableFromFile (
147 Filename, File, GetOnlyAmlTables, &Table);
149 if (Status == AE_CTRL_TERMINATE)
154 else if (Status == AE_TYPE)
158 else if (ACPI_FAILURE (Status))
163 /* Print table header for iASL/disassembler only */
165 #ifdef ACPI_ASL_COMPILER
167 AcpiTbPrintTableHeader (0, Table);
170 /* Allocate and link a table descriptor */
172 TableDesc = AcpiOsAllocate (sizeof (ACPI_NEW_TABLE_DESC));
173 TableDesc->Table = Table;
174 TableDesc->Next = NULL;
176 /* Link at the end of the local table list */
180 ListHead = TableDesc;
181 ListTail = TableDesc;
185 ListTail->Next = TableDesc;
186 ListTail = TableDesc;
190 /* Add the local table list to the end of the global list */
194 ListTail = *ReturnListHead;
195 while (ListTail->Next)
197 ListTail = ListTail->Next;
200 ListTail->Next = ListHead;
204 *ReturnListHead = ListHead;
213 /*******************************************************************************
215 * FUNCTION: AcGetOneTableFromFile
217 * PARAMETERS: Filename - File where table is located
218 * File - Open FILE pointer to Filename
219 * GetOnlyAmlTables - TRUE if the tables must be AML tables.
220 * ReturnTable - Where a pointer to the table is returned
224 * DESCRIPTION: Read the next ACPI table from a file. Implements support
225 * for multiple tables within a single file. File must already
228 * Note: Loading an RSDP is not supported.
230 ******************************************************************************/
233 AcGetOneTableFromFile (
236 UINT8 GetOnlyAmlTables,
237 ACPI_TABLE_HEADER **ReturnTable)
239 ACPI_STATUS Status = AE_OK;
240 ACPI_TABLE_HEADER TableHeader;
241 ACPI_TABLE_HEADER *Table;
248 /* Get the table header to examine signature and length */
250 TableOffset = ftell (File);
251 Count = fread (&TableHeader, 1, sizeof (ACPI_TABLE_HEADER), File);
252 if (Count != sizeof (ACPI_TABLE_HEADER))
254 return (AE_CTRL_TERMINATE);
257 /* Validate the table signature/header (limited ASCII chars) */
259 Status = AcValidateTableHeader (File, TableOffset);
260 if (ACPI_FAILURE (Status))
265 if (GetOnlyAmlTables)
267 /* Table must be an AML table (DSDT/SSDT) or FADT */
269 if (!ACPI_COMPARE_NAME (TableHeader.Signature, ACPI_SIG_FADT) &&
270 !AcpiUtIsAmlTable (&TableHeader))
273 " %s: Table [%4.4s] is not an AML table - ignoring\n",
274 Filename, TableHeader.Signature);
280 /* Allocate a buffer for the entire table */
282 Table = AcpiOsAllocate ((ACPI_SIZE) TableHeader.Length);
285 return (AE_NO_MEMORY);
288 /* Read the entire ACPI table, including header */
290 fseek (File, TableOffset, SEEK_SET);
292 Count = fread (Table, 1, TableHeader.Length, File);
293 if (Count != (INT32) TableHeader.Length)
299 /* Validate the checksum (just issue a warning) */
301 Status = AcpiTbVerifyChecksum (Table, TableHeader.Length);
302 if (ACPI_FAILURE (Status))
304 Status = AcCheckTextModeCorruption (Table);
305 if (ACPI_FAILURE (Status))
311 *ReturnTable = Table;
321 /*******************************************************************************
323 * FUNCTION: AcIsFileBinary
325 * PARAMETERS: File - Open input file
327 * RETURN: TRUE if file appears to be binary
329 * DESCRIPTION: Scan a file for any non-ASCII bytes.
331 * Note: Maintains current file position.
333 ******************************************************************************/
340 BOOLEAN IsBinary = FALSE;
344 /* Scan entire file for any non-ASCII bytes */
346 FileOffset = ftell (File);
347 while (fread (&Byte, 1, 1, File) == 1)
349 if (!isprint (Byte) && !isspace (Byte))
357 fseek (File, FileOffset, SEEK_SET);
362 /*******************************************************************************
364 * FUNCTION: AcValidateTableHeader
366 * PARAMETERS: File - Open input file
370 * DESCRIPTION: Determine if a file seems to contain one or more binary ACPI
372 * following checks on what would be the table header:
373 * 1) File must be at least as long as an ACPI_TABLE_HEADER
374 * 2) There must be enough room in the file to hold entire table
375 * 3) Signature, OemId, OemTableId, AslCompilerId must be ASCII
377 * Note: There can be multiple definition blocks per file, so we cannot
378 * expect/compare the file size to be equal to the table length. 12/2015.
380 * Note: Maintains current file position.
382 ******************************************************************************/
385 AcValidateTableHeader (
389 ACPI_TABLE_HEADER TableHeader;
396 ACPI_FUNCTION_TRACE ("AcValidateTableHeader");
399 /* Read a potential table header */
401 OriginalOffset = ftell (File);
402 fseek (File, TableOffset, SEEK_SET);
404 Actual = fread (&TableHeader, 1, sizeof (ACPI_TABLE_HEADER), File);
405 fseek (File, OriginalOffset, SEEK_SET);
407 if (Actual < sizeof (ACPI_TABLE_HEADER))
412 /* Validate the signature (limited ASCII chars) */
414 if (!AcpiUtValidNameseg (TableHeader.Signature))
416 fprintf (stderr, "Invalid table signature: 0x%8.8X\n",
417 *ACPI_CAST_PTR (UINT32, TableHeader.Signature));
418 return (AE_BAD_SIGNATURE);
421 /* Validate table length against bytes remaining in the file */
423 FileSize = CmGetFileSize (File);
424 if (TableHeader.Length > (UINT32) (FileSize - TableOffset))
426 fprintf (stderr, "Table [%4.4s] is too long for file - "
427 "needs: 0x%.2X, remaining in file: 0x%.2X\n",
428 TableHeader.Signature, TableHeader.Length,
429 (UINT32) (FileSize - TableOffset));
430 return (AE_BAD_HEADER);
434 * These fields must be ASCII: OemId, OemTableId, AslCompilerId.
435 * We allow a NULL terminator in OemId and OemTableId.
437 for (i = 0; i < ACPI_NAME_SIZE; i++)
439 if (!ACPI_IS_ASCII ((UINT8) TableHeader.AslCompilerId[i]))
445 for (i = 0; (i < ACPI_OEM_ID_SIZE) && (TableHeader.OemId[i]); i++)
447 if (!ACPI_IS_ASCII ((UINT8) TableHeader.OemId[i]))
453 for (i = 0; (i < ACPI_OEM_TABLE_ID_SIZE) && (TableHeader.OemTableId[i]); i++)
455 if (!ACPI_IS_ASCII ((UINT8) TableHeader.OemTableId[i]))
466 ACPI_WARNING ((AE_INFO,
467 "Table header for [%4.4s] has invalid ASCII character(s)",
468 TableHeader.Signature));
473 /*******************************************************************************
475 * FUNCTION: AcCheckTextModeCorruption
477 * PARAMETERS: Table - Table buffer starting with table header
481 * DESCRIPTION: Check table for text mode file corruption where all linefeed
482 * characters (LF) have been replaced by carriage return linefeed
485 ******************************************************************************/
488 AcCheckTextModeCorruption (
489 ACPI_TABLE_HEADER *Table)
493 UINT8 *Buffer = ACPI_CAST_PTR (UINT8, Table);
496 /* Scan entire table to determine if each LF has been prefixed with a CR */
498 for (i = 1; i < Table->Length; i++)
500 if (Buffer[i] == 0x0A)
502 if (Buffer[i - 1] != 0x0D)
504 /* The LF does not have a preceding CR, table not corrupted */
510 /* Found a CR/LF pair */
525 * Entire table scanned, each CR is part of a CR/LF pair --
526 * meaning that the table was treated as a text file somewhere.
528 * NOTE: We can't "fix" the table, because any existing CR/LF pairs in the
529 * original table are left untouched by the text conversion process --
530 * meaning that we cannot simply replace CR/LF pairs with LFs.
532 AcpiOsPrintf ("Table has been corrupted by text mode conversion\n");
533 AcpiOsPrintf ("All LFs (%u) were changed to CR/LF pairs\n", Pairs);
534 AcpiOsPrintf ("Table cannot be repaired!\n");
536 return (AE_BAD_VALUE);