diff options
Diffstat (limited to 'drivers/acpi/acpica/utfileio.c')
| -rw-r--r-- | drivers/acpi/acpica/utfileio.c | 332 |
1 files changed, 332 insertions, 0 deletions
diff --git a/drivers/acpi/acpica/utfileio.c b/drivers/acpi/acpica/utfileio.c new file mode 100644 index 000000000000..bdf9914733cb --- /dev/null +++ b/drivers/acpi/acpica/utfileio.c @@ -0,0 +1,332 @@ +/******************************************************************************* + * + * Module Name: utfileio - simple file I/O routines + * + ******************************************************************************/ + +/* + * Copyright (C) 2000 - 2014, 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/acpi.h> +#include "accommon.h" +#include "actables.h" +#include "acapps.h" + +#ifdef ACPI_ASL_COMPILER +#include "aslcompiler.h" +#endif + +#define _COMPONENT ACPI_CA_DEBUGGER +ACPI_MODULE_NAME("utfileio") + +#ifdef ACPI_APPLICATION +/* Local prototypes */ +static acpi_status +acpi_ut_check_text_mode_corruption(u8 *table, + u32 table_length, u32 file_length); + +static acpi_status +acpi_ut_read_table(FILE * fp, + struct acpi_table_header **table, u32 *table_length); + +/******************************************************************************* + * + * FUNCTION: acpi_ut_check_text_mode_corruption + * + * PARAMETERS: table - Table buffer + * table_length - Length of table from the table header + * file_length - Length of the file that contains the table + * + * 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 +acpi_ut_check_text_mode_corruption(u8 *table, u32 table_length, u32 file_length) +{ + u32 i; + u32 pairs = 0; + + if (table_length != file_length) { + ACPI_WARNING((AE_INFO, + "File length (0x%X) is not the same as the table length (0x%X)", + file_length, table_length)); + } + + /* Scan entire table to determine if each LF has been prefixed with a CR */ + + for (i = 1; i < file_length; i++) { + if (table[i] == 0x0A) { + if (table[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. + */ + acpi_os_printf("Table has been corrupted by text mode conversion\n"); + acpi_os_printf("All LFs (%u) were changed to CR/LF pairs\n", pairs); + acpi_os_printf("Table cannot be repaired!\n"); + return (AE_BAD_VALUE); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ut_read_table + * + * PARAMETERS: fp - File that contains table + * table - Return value, buffer with table + * table_length - Return value, length of table + * + * RETURN: Status + * + * DESCRIPTION: Load the DSDT from the file pointer + * + ******************************************************************************/ + +static acpi_status +acpi_ut_read_table(FILE * fp, + struct acpi_table_header **table, u32 *table_length) +{ + struct acpi_table_header table_header; + u32 actual; + acpi_status status; + u32 file_size; + u8 standard_header = TRUE; + s32 count; + + /* Get the file size */ + + file_size = cm_get_file_size(fp); + if (file_size == ACPI_UINT32_MAX) { + return (AE_ERROR); + } + + if (file_size < 4) { + return (AE_BAD_HEADER); + } + + /* Read the signature */ + + fseek(fp, 0, SEEK_SET); + + count = fread(&table_header, 1, sizeof(struct acpi_table_header), fp); + if (count != sizeof(struct acpi_table_header)) { + acpi_os_printf("Could not read the table header\n"); + return (AE_BAD_HEADER); + } + + /* The RSDP table does not have standard ACPI header */ + + if (ACPI_VALIDATE_RSDP_SIG(table_header.signature)) { + *table_length = file_size; + standard_header = FALSE; + } else { + +#if 0 + /* Validate the table header/length */ + + status = acpi_tb_validate_table_header(&table_header); + if (ACPI_FAILURE(status)) { + acpi_os_printf("Table header is invalid!\n"); + return (status); + } +#endif + + /* File size must be at least as long as the Header-specified length */ + + if (table_header.length > file_size) { + acpi_os_printf + ("TableHeader length [0x%X] greater than the input file size [0x%X]\n", + table_header.length, file_size); + +#ifdef ACPI_ASL_COMPILER + status = fl_check_for_ascii(fp, NULL, FALSE); + if (ACPI_SUCCESS(status)) { + acpi_os_printf + ("File appears to be ASCII only, must be binary\n", + table_header.length, file_size); + } +#endif + return (AE_BAD_HEADER); + } +#ifdef ACPI_OBSOLETE_CODE + /* We only support a limited number of table types */ + + if (!ACPI_COMPARE_NAME + ((char *)table_header.signature, ACPI_SIG_DSDT) + && !ACPI_COMPARE_NAME((char *)table_header.signature, + ACPI_SIG_PSDT) + && !ACPI_COMPARE_NAME((char *)table_header.signature, + ACPI_SIG_SSDT)) { + acpi_os_printf + ("Table signature [%4.4s] is invalid or not supported\n", + (char *)table_header.signature); + ACPI_DUMP_BUFFER(&table_header, + sizeof(struct acpi_table_header)); + return (AE_ERROR); + } +#endif + + *table_length = table_header.length; + } + + /* Allocate a buffer for the table */ + + *table = acpi_os_allocate((size_t) file_size); + if (!*table) { + acpi_os_printf + ("Could not allocate memory for ACPI table %4.4s (size=0x%X)\n", + table_header.signature, *table_length); + return (AE_NO_MEMORY); + } + + /* Get the rest of the table */ + + fseek(fp, 0, SEEK_SET); + actual = fread(*table, 1, (size_t) file_size, fp); + if (actual == file_size) { + if (standard_header) { + + /* Now validate the checksum */ + + status = acpi_tb_verify_checksum((void *)*table, + ACPI_CAST_PTR(struct + acpi_table_header, + *table)-> + length); + + if (status == AE_BAD_CHECKSUM) { + status = + acpi_ut_check_text_mode_corruption((u8 *) + *table, + file_size, + (*table)-> + length); + return (status); + } + } + return (AE_OK); + } + + if (actual > 0) { + acpi_os_printf("Warning - reading table, asked for %X got %X\n", + file_size, actual); + return (AE_OK); + } + + acpi_os_printf("Error - could not read the table file\n"); + acpi_os_free(*table); + *table = NULL; + *table_length = 0; + return (AE_ERROR); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ut_read_table_from_file + * + * PARAMETERS: filename - File where table is located + * table - Where a pointer to the table is returned + * + * RETURN: Status + * + * DESCRIPTION: Get an ACPI table from a file + * + ******************************************************************************/ + +acpi_status +acpi_ut_read_table_from_file(char *filename, struct acpi_table_header ** table) +{ + FILE *file; + u32 file_size; + u32 table_length; + acpi_status status = AE_ERROR; + + /* Open the file, get current size */ + + file = fopen(filename, "rb"); + if (!file) { + perror("Could not open input file"); + return (status); + } + + file_size = cm_get_file_size(file); + if (file_size == ACPI_UINT32_MAX) { + goto exit; + } + + /* Get the entire file */ + + fprintf(stderr, + "Loading Acpi table from file %10s - Length %.8u (%06X)\n", + filename, file_size, file_size); + + status = acpi_ut_read_table(file, table, &table_length); + if (ACPI_FAILURE(status)) { + acpi_os_printf("Could not get table from the file\n"); + } + +exit: + fclose(file); + return (status); +} + +#endif |