71 lines
1.6 KiB
Bash
71 lines
1.6 KiB
Bash
#!/bin/sh
|
|
# $NetBSD: elf2aout.sh,v 1.3 2002/02/20 21:54:08 skrll Exp $
|
|
#
|
|
# Shell script to convert an ARM ELF kernel into a bootable a.out kernel by
|
|
# changing the header block on the kernel, and shuffling bits around in the
|
|
# file. Care has to be taken with the sections as they need to be page
|
|
# aligned.
|
|
#
|
|
# XXX In a perfect world, objcopy -O a.out-arm-netbsd would work, but
|
|
# XXX bugs lurking in BFD prevent it from doing so.
|
|
|
|
AWKPROG='\
|
|
function x(v) { printf "%c%c%c\0", v, v / 256, v / 65536 } \
|
|
{ \
|
|
printf "\0\217\01\013"; \
|
|
x($1); \
|
|
x($2); \
|
|
x($3); \
|
|
printf "\0\0\0\0"; \
|
|
printf "\040\0\0\360"; \
|
|
printf "\0\0\0\0"; \
|
|
printf "\0\0\0\0" \
|
|
}'
|
|
|
|
infile=${1}
|
|
outfile=${2}
|
|
|
|
trap "rm -f ${infile}.text ${infile}.data" 0 1 2 3 15
|
|
|
|
${OBJCOPY} -O binary -j .text ${infile} ${infile}.text || exit 1
|
|
${OBJCOPY} -O binary -j .data ${infile} ${infile}.data || exit 1
|
|
|
|
set -- `${SIZE} ${infile} | tail +2`
|
|
TEXT=$1
|
|
DATA=$2
|
|
BSS=$3
|
|
|
|
TALIGN=$(( (($TEXT + 4095) / 4096) * 4096 ))
|
|
DALIGN=$(( (($DATA + 4095) / 4096) * 4096 ))
|
|
BALIGN=$(( (($BSS + 4095) / 4096) * 4096 ))
|
|
|
|
TPAD=$(( $TALIGN - $TEXT ))
|
|
DPAD=$(( $DALIGN - $DATA ))
|
|
BPAD=$(( $BALIGN - $BSS ))
|
|
|
|
DTMP=$(( $DATA + 32768 - $TPAD ))
|
|
|
|
TDPAD=32768
|
|
DBPAD=$(( ((($DTMP + 4095) / 4096) * 4096) - $DTMP ))
|
|
|
|
echo TEXT = $TEXT
|
|
echo TPAD = $TPAD
|
|
echo TDPAD = $TDPAD
|
|
|
|
echo DATA = $DATA
|
|
echo DPAD = $DPAD
|
|
echo DBPAD = $DBPAD
|
|
|
|
(
|
|
echo $TALIGN $DTMP $BSS | awk "${AWKPROG}"; \
|
|
cat ${infile}.text; \
|
|
dd if=/dev/zero bs=$TDPAD count=1; \
|
|
cat ${infile}.data; \
|
|
dd if=/dev/zero bs=$DBPAD count=1 \
|
|
) > ${outfile}
|
|
|
|
${SIZE} ${outfile}
|
|
chmod 755 ${outfile}
|
|
|
|
exit 0
|