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/*
* Copyright 2009 Luc Verhaegen <libv@skynet.be>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; see the file COPYING. If not, write to
* the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#define _GNU_SOURCE /* memmem is useful */
#include <stdio.h>
#include <inttypes.h>
#include <errno.h>
#include <string.h>
#include <sys/mman.h>
#include <fcntl.h>
#include <unistd.h>
#include "bios_extract.h"
static void
HelpPrint(char *name)
{
printf("\n");
printf("Program to extract compressed modules from BIOS images.\n");
printf("Supports AMI, Award, Asus and Phoenix BIOSes.\n");
printf("\n");
printf("Usage:\n\t%s <filename>\n", name);
}
unsigned char *
MMapOutputFile(char *filename, int size)
{
unsigned char* Buffer;
int fd;
fd = open(filename, O_RDWR | O_CREAT | O_TRUNC, S_IRUSR | S_IWUSR);
if (fd < 0) {
fprintf(stderr, "Error: unable to open %s: %s\n\n",
filename, strerror(errno));
return NULL;
}
/* grow file */
if (lseek(fd, size - 1, SEEK_SET) == -1) {
fprintf(stderr, "Error: Failed to grow \"%s\": %s\n",
filename, strerror(errno));
close(fd);
return NULL;
}
if (write(fd, "", 1) != 1) {
fprintf(stderr, "Error: Failed to write to \"%s\": %s\n",
filename, strerror(errno));
close(fd);
return NULL;
}
Buffer = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
if (Buffer == ((void *) -1)) {
fprintf(stderr, "Error: Failed to mmap %s: %s\n",
filename, strerror(errno));
close(fd);
return NULL;
}
close(fd);
return Buffer;
}
static struct {
char *String1;
char *String2;
Bool (*Handler) (unsigned char *Image, int ImageLength, int ImageOffset,
uint32_t Offset1, uint32_t Offset2);
} BIOSIdentification[] = {
{"AMIBOOT ROM", "AMIBIOSC", AMI95Extract},
{"$ASUSAMI$", "AMIBIOSC", AMI95Extract},
{"Award BootBlock", "= Award Decompression Bios =", AwardExtract},
{"Phoenix FirstBIOS", "BCPSEGMENT", PhoenixExtract},
{"PhoenixBIOS 4.0", "BCPSEGMENT", PhoenixExtract},
{"Phoenix TrustedCore", "BCPSEGMENT", PhoenixTrustedExtract},
{NULL, NULL, NULL},
};
/*
*
*/
int
main(int argc, char *argv[])
{
int FileLength = 0;
uint32_t BIOSOffset = 0;
unsigned char *BIOSImage = NULL;
int fd;
uint32_t Offset1, Offset2;
int i, len;
unsigned char *tmp;
if ((argc != 2) || !strcmp(argv[1], "-h") || !strcmp(argv[1], "--help")){
HelpPrint(argv[0]);
return 1;
}
fd = open(argv[1], O_RDONLY);
if (fd < 0) {
fprintf(stderr, "Error: Failed to open %s: %s\n",
argv[1], strerror(errno));
return 1;
}
FileLength = lseek(fd, 0, SEEK_END);
if (FileLength < 0) {
fprintf(stderr, "Error: Failed to lseek \"%s\": %s\n",
argv[1], strerror(errno));
return 1;
}
BIOSOffset = 0x100000 - FileLength;
BIOSImage = mmap(NULL, FileLength, PROT_READ, MAP_PRIVATE, fd, 0);
if (BIOSImage < 0) {
fprintf(stderr, "Error: Failed to mmap %s: %s\n",
argv[1], strerror(errno));
return 1;
}
printf("Using file \"%s\" (%ukB)\n", argv[1], FileLength >> 10);
for (i = 0; BIOSIdentification[i].Handler; i++) {
len = strlen(BIOSIdentification[i].String1);
tmp = memmem(BIOSImage, FileLength - len, BIOSIdentification[i].String1, len);
if (!tmp)
continue;
Offset1 = tmp - BIOSImage;
len = strlen(BIOSIdentification[i].String2);
tmp = memmem(BIOSImage, FileLength - len, BIOSIdentification[i].String2, len);
if (!tmp)
continue;
Offset2 = tmp - BIOSImage;
if (BIOSIdentification[i].Handler(BIOSImage, FileLength, BIOSOffset,
Offset1, Offset2))
return 0;
else
return 1;
}
fprintf(stderr, "Error: Unable to detect BIOS Image type.\n");
return 1;
}
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