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Diffstat (limited to 'source/common/acfileio.c')
| -rw-r--r-- | source/common/acfileio.c | 357 |
1 files changed, 357 insertions, 0 deletions
diff --git a/source/common/acfileio.c b/source/common/acfileio.c new file mode 100644 index 0000000000000..b94adf8c49006 --- /dev/null +++ b/source/common/acfileio.c @@ -0,0 +1,357 @@ +/****************************************************************************** + * + * Module Name: acfileio - Get ACPI tables from file + * + *****************************************************************************/ + +/* + * Copyright (C) 2000 - 2015, Intel Corp. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions, and the following disclaimer, + * without modification. + * 2. Redistributions in binary form must reproduce at minimum a disclaimer + * substantially similar to the "NO WARRANTY" disclaimer below + * ("Disclaimer") and any redistribution must be conditioned upon + * including a substantially similar Disclaimer requirement for further + * binary redistribution. + * 3. Neither the names of the above-listed copyright holders nor the names + * of any contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * Alternatively, this software may be distributed under the terms of the + * GNU General Public License ("GPL") version 2 as published by the Free + * Software Foundation. + * + * NO WARRANTY + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGES. + */ + +#include "acpi.h" +#include "accommon.h" +#include "acapps.h" +#include "actables.h" +#include "acutils.h" +#include <errno.h> + +#define _COMPONENT ACPI_UTILITIES + ACPI_MODULE_NAME ("acfileio") + + +/* Local prototypes */ + +static ACPI_STATUS +AcpiAcGetOneTableFromFile ( + char *Filename, + FILE *File, + UINT8 GetOnlyAmlTables, + ACPI_TABLE_HEADER **Table); + +static ACPI_STATUS +AcpiAcCheckTextModeCorruption ( + ACPI_TABLE_HEADER *Table); + + +/******************************************************************************* + * + * FUNCTION: AcpiAcGetAllTablesFromFile + * + * PARAMETERS: Filename - Table filename + * GetOnlyAmlTables - TRUE if the tables must be AML tables + * ReturnListHead - Where table list is returned + * + * RETURN: Status + * + * DESCRIPTION: Get all ACPI tables from within a single file. + * + ******************************************************************************/ + +ACPI_STATUS +AcpiAcGetAllTablesFromFile ( + char *Filename, + UINT8 GetOnlyAmlTables, + ACPI_NEW_TABLE_DESC **ReturnListHead) +{ + ACPI_NEW_TABLE_DESC *ListHead = NULL; + ACPI_NEW_TABLE_DESC *ListTail = NULL; + ACPI_NEW_TABLE_DESC *TableDesc; + FILE *File; + ACPI_TABLE_HEADER *Table = NULL; + UINT32 FileSize; + ACPI_STATUS Status = AE_OK; + + + File = fopen (Filename, "rb"); + if (!File) + { + perror ("Could not open input file"); + if (errno == ENOENT) + { + return (AE_NOT_EXIST); + } + + return (AE_ERROR); + } + + /* Get the file size */ + + FileSize = CmGetFileSize (File); + if (FileSize == ACPI_UINT32_MAX) + { + return (AE_ERROR); + } + + if (FileSize < 4) + { + return (AE_BAD_HEADER); + } + + /* Read all tables within the file */ + + while (ACPI_SUCCESS (Status)) + { + /* Get one entire ACPI table */ + + Status = AcpiAcGetOneTableFromFile ( + Filename, File, GetOnlyAmlTables, &Table); + if (Status == AE_CTRL_TERMINATE) + { + Status = AE_OK; + break; + } + else if (Status == AE_TYPE) + { + continue; + } + else if (ACPI_FAILURE (Status)) + { + return (Status); + } + + /* Allocate and link a table descriptor */ + + TableDesc = AcpiOsAllocate (sizeof (ACPI_NEW_TABLE_DESC)); + TableDesc->Table = Table; + TableDesc->Next = NULL; + + /* Link at the end of the local table list */ + + if (!ListHead) + { + ListHead = TableDesc; + ListTail = TableDesc; + } + else + { + ListTail->Next = TableDesc; + ListTail = TableDesc; + } + } + + /* Add the local table list to the end of the global list */ + + if (*ReturnListHead) + { + ListTail = *ReturnListHead; + while (ListTail->Next) + { + ListTail = ListTail->Next; + } + + ListTail->Next = ListHead; + } + else + { + *ReturnListHead = ListHead; + } + + fclose(File); + return (Status); +} + + +/******************************************************************************* + * + * FUNCTION: AcpiAcGetOneTableFromFile + * + * PARAMETERS: Filename - File where table is located + * File - Open FILE pointer to Filename + * GetOnlyAmlTables - TRUE if the tables must be AML tables. + * ReturnTable - Where a pointer to the table is returned + * + * RETURN: Status + * + * DESCRIPTION: Read the next ACPI table from a file. Implements support + * for multiple tables within a single file. File must already + * be open. + * + * Note: Loading an RSDP is not supported. + * + ******************************************************************************/ + +static ACPI_STATUS +AcpiAcGetOneTableFromFile ( + char *Filename, + FILE *File, + UINT8 GetOnlyAmlTables, + ACPI_TABLE_HEADER **ReturnTable) +{ + ACPI_STATUS Status = AE_OK; + ACPI_TABLE_HEADER TableHeader; + ACPI_TABLE_HEADER *Table; + INT32 Count; + long Position; + + + *ReturnTable = NULL; + + + /* Get just the table header to get signature and length */ + + Position = ftell (File); + Count = fread (&TableHeader, 1, sizeof (ACPI_TABLE_HEADER), File); + if (Count != sizeof (ACPI_TABLE_HEADER)) + { + return (AE_CTRL_TERMINATE); + } + + if (GetOnlyAmlTables) + { + /* Table must be an AML table (DSDT/SSDT) or FADT */ + + if (!ACPI_COMPARE_NAME (TableHeader.Signature, ACPI_SIG_FADT) && + !AcpiUtIsAmlTable (&TableHeader)) + { + fprintf (stderr, + " %s: [%4.4s] is not an AML table - ignoring\n", + Filename, TableHeader.Signature); + + return (AE_TYPE); + } + } + + /* Allocate a buffer for the entire table */ + + Table = AcpiOsAllocate ((size_t) TableHeader.Length); + if (!Table) + { + return (AE_NO_MEMORY); + } + + /* Now read the entire table */ + + fseek (File, Position, SEEK_SET); + + Count = fread (Table, 1, TableHeader.Length, File); + if (Count != (INT32) TableHeader.Length) + { + Status = AE_ERROR; + goto ErrorExit; + } + + /* Validate the checksum (just issue a warning) */ + + Status = AcpiTbVerifyChecksum (Table, TableHeader.Length); + if (ACPI_FAILURE (Status)) + { + Status = AcpiAcCheckTextModeCorruption (Table); + if (ACPI_FAILURE (Status)) + { + goto ErrorExit; + } + } + + fprintf (stderr, + "Loading ACPI table [%4.4s] from file %12s - Length 0x%06X (%u)\n", + TableHeader.Signature, Filename, + TableHeader.Length, TableHeader.Length); + + *ReturnTable = Table; + return (AE_OK); + + +ErrorExit: + AcpiOsFree (Table); + return (Status); +} + + +/******************************************************************************* + * + * FUNCTION: AcpiAcCheckTextModeCorruption + * + * PARAMETERS: Table - Table buffer starting with table header + * + * RETURN: Status + * + * DESCRIPTION: Check table for text mode file corruption where all linefeed + * characters (LF) have been replaced by carriage return linefeed + * pairs (CR/LF). + * + ******************************************************************************/ + +static ACPI_STATUS +AcpiAcCheckTextModeCorruption ( + ACPI_TABLE_HEADER *Table) +{ + UINT32 i; + UINT32 Pairs = 0; + UINT8 *Buffer = ACPI_CAST_PTR (UINT8, Table); + + + /* Scan entire table to determine if each LF has been prefixed with a CR */ + + for (i = 1; i < Table->Length; i++) + { + if (Buffer[i] == 0x0A) + { + if (Buffer[i - 1] != 0x0D) + { + /* The LF does not have a preceding CR, table not corrupted */ + + return (AE_OK); + } + else + { + /* Found a CR/LF pair */ + + Pairs++; + } + + i++; + } + } + + if (!Pairs) + { + return (AE_OK); + } + + /* + * Entire table scanned, each CR is part of a CR/LF pair -- + * meaning that the table was treated as a text file somewhere. + * + * NOTE: We can't "fix" the table, because any existing CR/LF pairs in the + * original table are left untouched by the text conversion process -- + * meaning that we cannot simply replace CR/LF pairs with LFs. + */ + AcpiOsPrintf ("Table has been corrupted by text mode conversion\n"); + AcpiOsPrintf ("All LFs (%u) were changed to CR/LF pairs\n", Pairs); + AcpiOsPrintf ("Table cannot be repaired!\n"); + + return (AE_BAD_VALUE); +} |