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+/******************************************************************************
+ *
+ * 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);
+}
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