ACPICA: Utilities: Add support to read table from files
After the new table reading utility functions are well tested, acpidump can also switch to use the generic acpi_ut_read_table_xxx() APIs. Currently this patch is no-op as acpidump does not link to the new APIs. This patch is only useful for ACPICA applications, most of which are not shipped in the Linux kernel. Signed-off-by: Lv Zheng <lv.zheng@intel.com> Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Lv Zheng
Rafael J. Wysocki
parent
ae8ffc7dbb
commit
e740304c7c
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@ -175,5 +175,5 @@ acpi-y += \
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utxferror.o \
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utxfmutex.o
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acpi-$(ACPI_FUTURE_USAGE) += uttrack.o utcache.o
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acpi-$(ACPI_FUTURE_USAGE) += utfileio.o uttrack.o utcache.o
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@ -233,9 +233,6 @@ acpi_status acpi_db_load_acpi_table(char *filename);
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acpi_status
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acpi_db_get_table_from_file(char *filename, struct acpi_table_header **table);
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acpi_status
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acpi_db_read_table_from_file(char *filename, struct acpi_table_header **table);
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/*
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* dbhistry - debugger HISTORY command
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*/
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@ -393,6 +393,14 @@ acpi_ut_execute_power_methods(struct acpi_namespace_node *device_node,
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const char **method_names,
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u8 method_count, u8 *out_values);
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/*
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* utfileio - file operations
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*/
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#ifdef ACPI_APPLICATION
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acpi_status
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acpi_ut_read_table_from_file(char *filename, struct acpi_table_header **table);
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#endif
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/*
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* utids - device ID support
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*/
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@ -0,0 +1,337 @@
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/*******************************************************************************
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*
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* Module Name: utfileio - simple file I/O routines
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*
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******************************************************************************/
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/*
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* Copyright (C) 2000 - 2014, Intel Corp.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer,
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* without modification.
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* 2. Redistributions in binary form must reproduce at minimum a disclaimer
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* substantially similar to the "NO WARRANTY" disclaimer below
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* ("Disclaimer") and any redistribution must be conditioned upon
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* including a substantially similar Disclaimer requirement for further
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* binary redistribution.
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* 3. Neither the names of the above-listed copyright holders nor the names
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* of any contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* NO WARRANTY
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGES.
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*/
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#include <acpi/acpi.h>
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#include "accommon.h"
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#include "actables.h"
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#include "acapps.h"
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#ifdef ACPI_ASL_COMPILER
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#include "aslcompiler.h"
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#endif
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#define _COMPONENT ACPI_CA_DEBUGGER
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ACPI_MODULE_NAME("utfileio")
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#ifdef ACPI_APPLICATION
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/* Local prototypes */
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static acpi_status
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acpi_ut_check_text_mode_corruption(u8 *table,
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u32 table_length, u32 file_length);
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static acpi_status
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acpi_ut_read_table(FILE * fp,
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struct acpi_table_header **table, u32 *table_length);
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/*******************************************************************************
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*
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* FUNCTION: acpi_ut_check_text_mode_corruption
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*
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* PARAMETERS: table - Table buffer
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* table_length - Length of table from the table header
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* file_length - Length of the file that contains the table
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*
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* RETURN: Status
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*
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* DESCRIPTION: Check table for text mode file corruption where all linefeed
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* characters (LF) have been replaced by carriage return linefeed
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* pairs (CR/LF).
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*
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******************************************************************************/
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static acpi_status
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acpi_ut_check_text_mode_corruption(u8 *table, u32 table_length, u32 file_length)
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{
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u32 i;
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u32 pairs = 0;
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if (table_length != file_length) {
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ACPI_WARNING((AE_INFO,
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"File length (0x%X) is not the same as the table length (0x%X)",
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file_length, table_length));
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}
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/* Scan entire table to determine if each LF has been prefixed with a CR */
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for (i = 1; i < file_length; i++) {
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if (table[i] == 0x0A) {
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if (table[i - 1] != 0x0D) {
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/* The LF does not have a preceding CR, table not corrupted */
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return (AE_OK);
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} else {
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/* Found a CR/LF pair */
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pairs++;
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}
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i++;
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}
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}
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if (!pairs) {
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return (AE_OK);
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}
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/*
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* Entire table scanned, each CR is part of a CR/LF pair --
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* meaning that the table was treated as a text file somewhere.
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*
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* NOTE: We can't "fix" the table, because any existing CR/LF pairs in the
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* original table are left untouched by the text conversion process --
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* meaning that we cannot simply replace CR/LF pairs with LFs.
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*/
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acpi_os_printf("Table has been corrupted by text mode conversion\n");
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acpi_os_printf("All LFs (%u) were changed to CR/LF pairs\n", pairs);
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acpi_os_printf("Table cannot be repaired!\n");
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return (AE_BAD_VALUE);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ut_read_table
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*
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* PARAMETERS: fp - File that contains table
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* table - Return value, buffer with table
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* table_length - Return value, length of table
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*
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* RETURN: Status
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*
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* DESCRIPTION: Load the DSDT from the file pointer
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*
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******************************************************************************/
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static acpi_status
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acpi_ut_read_table(FILE * fp,
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struct acpi_table_header **table, u32 *table_length)
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{
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struct acpi_table_header table_header;
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u32 actual;
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acpi_status status;
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u32 file_size;
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u8 standard_header = TRUE;
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/* Get the file size */
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file_size = cm_get_file_size(fp);
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if (file_size == ACPI_UINT32_MAX) {
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return (AE_ERROR);
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}
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if (file_size < 4) {
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return (AE_BAD_HEADER);
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}
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/* Read the signature */
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if (fread(&table_header, 1, 4, fp) != 4) {
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acpi_os_printf("Could not read the table signature\n");
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return (AE_BAD_HEADER);
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}
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fseek(fp, 0, SEEK_SET);
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/* The RSDP table does not have standard ACPI header */
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if (ACPI_COMPARE_NAME(table_header.signature, "RSD ")) {
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*table_length = file_size;
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standard_header = FALSE;
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} else {
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/* Read the table header */
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if (fread
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(&table_header, 1, sizeof(struct acpi_table_header),
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fp) != sizeof(struct acpi_table_header)) {
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acpi_os_printf("Could not read the table header\n");
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return (AE_BAD_HEADER);
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}
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#if 0
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/* Validate the table header/length */
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status = acpi_tb_validate_table_header(&table_header);
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if (ACPI_FAILURE(status)) {
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acpi_os_printf("Table header is invalid!\n");
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return (status);
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}
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#endif
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/* File size must be at least as long as the Header-specified length */
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if (table_header.length > file_size) {
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acpi_os_printf
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("TableHeader length [0x%X] greater than the input file size [0x%X]\n",
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table_header.length, file_size);
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#ifdef ACPI_ASL_COMPILER
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status = fl_check_for_ascii(fp, NULL, FALSE);
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if (ACPI_SUCCESS(status)) {
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acpi_os_printf
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("File appears to be ASCII only, must be binary\n",
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table_header.length, file_size);
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}
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#endif
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return (AE_BAD_HEADER);
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}
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#ifdef ACPI_OBSOLETE_CODE
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/* We only support a limited number of table types */
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if (!ACPI_COMPARE_NAME
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((char *)table_header.signature, ACPI_SIG_DSDT)
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&& !ACPI_COMPARE_NAME((char *)table_header.signature,
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ACPI_SIG_PSDT)
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&& !ACPI_COMPARE_NAME((char *)table_header.signature,
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ACPI_SIG_SSDT)) {
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acpi_os_printf
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("Table signature [%4.4s] is invalid or not supported\n",
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(char *)table_header.signature);
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ACPI_DUMP_BUFFER(&table_header,
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sizeof(struct acpi_table_header));
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return (AE_ERROR);
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}
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#endif
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*table_length = table_header.length;
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}
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/* Allocate a buffer for the table */
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*table = acpi_os_allocate((size_t) file_size);
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if (!*table) {
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acpi_os_printf
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("Could not allocate memory for ACPI table %4.4s (size=0x%X)\n",
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table_header.signature, *table_length);
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return (AE_NO_MEMORY);
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}
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/* Get the rest of the table */
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fseek(fp, 0, SEEK_SET);
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actual = fread(*table, 1, (size_t) file_size, fp);
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if (actual == file_size) {
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if (standard_header) {
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/* Now validate the checksum */
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status = acpi_tb_verify_checksum((void *)*table,
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ACPI_CAST_PTR(struct
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acpi_table_header,
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*table)->
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length);
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if (status == AE_BAD_CHECKSUM) {
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status =
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acpi_ut_check_text_mode_corruption((u8 *)
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*table,
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file_size,
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(*table)->
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length);
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return (status);
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}
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}
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return (AE_OK);
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}
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if (actual > 0) {
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acpi_os_printf("Warning - reading table, asked for %X got %X\n",
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file_size, actual);
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return (AE_OK);
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}
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acpi_os_printf("Error - could not read the table file\n");
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acpi_os_free(*table);
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*table = NULL;
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*table_length = 0;
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return (AE_ERROR);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ut_read_table_from_file
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*
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* PARAMETERS: filename - File where table is located
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* table - Where a pointer to the table is returned
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*
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* RETURN: Status
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*
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* DESCRIPTION: Get an ACPI table from a file
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*
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******************************************************************************/
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acpi_status
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acpi_ut_read_table_from_file(char *filename, struct acpi_table_header ** table)
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{
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FILE *file;
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u32 file_size;
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u32 table_length;
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acpi_status status = AE_ERROR;
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/* Open the file, get current size */
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file = fopen(filename, "rb");
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if (!file) {
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perror("Could not open input file");
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return (status);
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}
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file_size = cm_get_file_size(file);
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if (file_size == ACPI_UINT32_MAX) {
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goto exit;
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}
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/* Get the entire file */
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fprintf(stderr,
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"Loading Acpi table from file %10s - Length %.8u (%06X)\n",
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filename, file_size, file_size);
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status = acpi_ut_read_table(file, table, &table_length);
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if (ACPI_FAILURE(status)) {
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acpi_os_printf("Could not get table from the file\n");
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}
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exit:
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fclose(file);
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return (status);
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}
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#endif
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