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Replace signrom with shell script v3

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In order to not execute code we just compiled, let's replace signrom
with a shell script that does the same thing while staying compatible
to pretty much every system available.

This should make cross-compilation for windows easier.

aliguori: fix build when objdir != srcdir

Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Alexander Graf 2009-07-01 22:08:21 +02:00 committed by Anthony Liguori
parent 1cec71e359
commit 89e671e3f3
3 changed files with 48 additions and 85 deletions
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9
pc-bios/optionrom/Makefile
View file

@ -37,12 +37,9 @@ build-all: multiboot.bin
%.img: %.o
$(LD) --oformat binary -Ttext 0 -o $@ $<
%.bin: %.img signrom
./signrom $< $@
%.bin: %.img
$(SRC_PATH)/pc-bios/optionrom/signrom.sh $< $@
cp $@ $(SRC_PATH)/pc-bios/
signrom: signrom.c
$(CC) -o $@ -g -Wall $^
clean:
$(RM) *.o *.img *.bin signrom *~
$(RM) *.o *.img *.bin *~

79
pc-bios/optionrom/signrom.c
View file

@ -1,79 +0,0 @@
/*
* Extended Boot Option ROM
*
* 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 of the License, 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; if not, write to the Free Software
* Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* Copyright IBM Corporation, 2007
* Authors: Anthony Liguori <aliguori@us.ibm.com>
*/
#include <stdio.h>
#include <stdint.h>
#include <string.h>
int main(int argc, char **argv)
{
FILE *fin, *fout;
char buffer[512], oldbuffer[512];
int i, size, lag = 0;
uint8_t sum = 0;
if (argc != 3) {
printf("Usage: %s ROM OUTPUT\n", argv[0]);
return 1;
}
fin = fopen(argv[1], "rb");
fout = fopen(argv[2], "wb");
if (fin == NULL || fout == NULL) {
fprintf(stderr, "Could not open input/output files\n");
return 1;
}
do {
size = fread(buffer, 512, 1, fin);
if (size == 1) {
for (i = 0; i < 512; i++)
sum += buffer[i];
if (lag) {
if (fwrite(oldbuffer, 512, 1, fout) != 1) {
fprintf(stderr, "Write failed\n");
return 1;
}
}
lag = 1;
memcpy(oldbuffer, buffer, 512);
}
} while (size == 1);
if (size != 0) {
fprintf(stderr, "Failed to read from input file\n");
return 1;
}
oldbuffer[511] = -sum;
if (fwrite(oldbuffer, 512, 1, fout) != 1) {
fprintf(stderr, "Failed to write to output file\n");
return 1;
}
fclose(fin);
fclose(fout);
return 0;
}

45
pc-bios/optionrom/signrom.sh Executable file
View file

@ -0,0 +1,45 @@
#!/bin/sh
# Option ROM Signing utility
#
# 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 of the License, 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; if not, write to the Free Software
# Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
#
# Copyright Novell Inc, 2009
# Authors: Alexander Graf <agraf@suse.de>
#
# Syntax: signrom.sh <input> <output>
# did we get proper arguments?
test "$1" -a "$2" || exit 1
sum=0
# find out the file size
x=`dd if="$1" bs=1 count=1 skip=2 2>/dev/null | od -t u1 -A n`
#size=`expr $x \* 512 - 1`
size=$(( $x * 512 - 1 ))
# now get the checksum
for i in `od -A n -t u1 -v "$1"`; do
# add each byte's value to sum
sum=$(( $sum + $i ))
done
sum=$(( $sum % 256 ))
sum=$(( 256 - $sum ))
# and write the output file
cp "$1" "$2"
printf "\\$sum" | dd of="$2" bs=1 count=1 seek=$size conv=notrunc 2>/dev/null