wok-current annotate linux/stuff/bootloader.sh @ rev 6489

Up: imagemagick, imagemagick-dev to 6.6.4-8.
author Christopher Rogers <slaxemulator@gmail.com>
date Thu Sep 30 19:44:34 2010 +0000 (2010-09-30)
parents d1ef2016ba84
children e86c6b88aff0
rev   line source
pascal@4504 1 #!/bin/sh
pascal@4504 2 #
pascal@4504 3 # This script creates a floppy image set from a linux bzImage and can merge
pascal@4504 4 # a cmdline and/or one or more initramfs.
pascal@4504 5 # The total size can not exceed 15M because INT 15H function 87H limitations.
pascal@4504 6 #
pascal@4504 7 # (C) 2009 Pascal Bellard - GNU General Public License v3.
pascal@4504 8
pascal@4504 9 usage()
pascal@4504 10 {
pascal@4504 11 cat <<EOT
pascal@4504 12 Usage: $0 bzImage [--prefix image_prefix] [--cmdline 'args']
pascal@4504 13 [--format 1440|1680|1720|2880 ] [--initrd initrdfile]...
pascal@4504 14
pascal@4504 15 Example:
pascal@4504 16 $0 /boot/vmlinuz-2.6.30.6 --cmdline 'rw lang=fr_FR kmap=fr-latin1 laptop autologin' --initrd /boot/rootfs.gz --initrd ./myconfig.gz
pascal@4504 17 EOT
pascal@4504 18 exit 1
pascal@4504 19 }
pascal@4504 20
pascal@4504 21 KERNEL=""
pascal@4504 22 INITRD=""
pascal@4504 23 CMDLINE=""
pascal@4504 24 PREFIX="floppy"
pascal@4504 25 FORMAT="1440"
pascal@4504 26 while [ -n "$1" ]; do
pascal@4504 27 case "$1" in
pascal@4504 28 --cmdline) CMDLINE="$2"; shift;;
pascal@4504 29 --initrd) INITRD="$INITRD $2"; shift;;
pascal@4504 30 --prefix) PREFIX="$2"; shift;;
pascal@4504 31 --format) FORMAT="$2"; shift;;
pascal@4504 32 *) KERNEL="$1";;
pascal@4504 33 esac
pascal@4504 34 shift
pascal@4504 35 done
pascal@4504 36 [ -n "$KERNEL" -a -f "$KERNEL" ] || usage
pascal@4504 37
pascal@4504 38 # write a 32 bits data
pascal@4504 39 # usage: storelong offset data32 file
pascal@4504 40 storelong()
pascal@4504 41 {
pascal@5564 42 echo $2 | awk '{ printf "%c%c%c%c",$1%256,($1/256)%256,($1/256/256)%256,
pascal@5564 43 ($1/256/256/256)%256 }' | \
pascal@5564 44 dd bs=1 conv=notrunc of=$3 seek=$(( $1 )) 2> /dev/null
pascal@4504 45 }
pascal@4504 46
pascal@4504 47 # read a 32 bits data
pascal@4504 48 # usage: getlong offset file
pascal@4504 49 getlong()
pascal@4504 50 {
pascal@4504 51 dd if=$2 bs=1 skip=$(( $1 )) count=4 2> /dev/null | \
pascal@4504 52 hexdump -e '"" 1/4 "%d" "\n"'
pascal@4504 53 }
pascal@4504 54
pascal@4504 55 floppyset()
pascal@4504 56 {
pascal@4504 57 # bzImage offsets
pascal@4504 58 SetupSzOfs=497
pascal@4504 59 SyssizeOfs=500
pascal@4504 60 CodeAdrOfs=0x214
pascal@4504 61 RamfsAdrOfs=0x218
pascal@4504 62 RamfsLenOfs=0x21C
pascal@4504 63 ArgPtrOfs=0x228
pascal@4504 64
pascal@4504 65 # boot+setup address
pascal@4504 66 SetupBase=0x90000
pascal@4504 67
pascal@4504 68 stacktop=0x9E00
pascal@4504 69
pascal@4504 70 bs=/tmp/bs$$
pascal@4504 71
pascal@4504 72 # Get and patch boot sector
pascal@5939 73 # See http://hg.slitaz.org/wok/raw-file/711d076b277c/linux/stuff/linux-header-2.6.34.u
pascal@4504 74 dd if=$KERNEL bs=512 count=1 of=$bs 2> /dev/null
pascal@4504 75 uudecode <<EOT | dd of=$bs conv=notrunc 2> /dev/null
pascal@4504 76 begin-base64 644 -
pascal@5424 77 /L+6nWgAkAcGF4n8McC5HQDzq1sfD6mg8X1ABlfFd3ixBvOlZWaPR3gGH8ZF
pascal@5424 78 +D/6l1hB6DQBvgACA3QO6HYBWwseKAJ0LFNH6AoBXuhmAbAgzRCwCM0QTuhl
pascal@5424 79 ATwIdAOIBK05NigCdPDoPgE8CnXgiHz+ieb/TBD/TBi/9AGBTRz/gMdFMACc
pascal@5424 80 sBCxBUi0k4lEHLABiUQUmGaY0+BIZgMFZtPoaAAQB7+AACn4nHMCAccx21BW
pascal@5424 81 6J4AXrkAgLSH/kQczRVYnXfcoRoCvxwCsQk4RBxyuJPNE+oAACCQsEYoyL7b
pascal@5424 82 AejSAF3rI4D5E3IEOMF3a4D+AnIEOOZ3bGCB/QAGdCoGUlFTlrQCULEGtQTB
pascal@5424 83 xQSwDyHoBJAnFEAn6IwA/s117LAgzRDitOiWAJjNE2FSUCjIdwKwAZg5+HIC
pascal@5424 84 ifhQtALNE5VeWFpyoJVBjuGAxwJPdFFOdfSM4ZU4wXVFiMj+xrEBOOZ1O4j0
pascal@5424 85 /sW2AID9UHIwOi7wAXIqtQBgvt4B/kQMU+gxAFvoOAB1FlKYzRO4AQLNE1rQ
pascal@5424 86 1Dpk/nXqRgjkdeVh64sWB7AxLAO0DrsHAM0QPA1088OwDejv/6wIwHX4w79s
pascal@5424 87 BLFbZQINuA0BZToNdArNFnT0mM0Wju9Hw1g6AEluc2VydCBkaXNrIDEuBw0A
pascal@4511 88 AA==
pascal@4504 89 ====
pascal@4504 90 EOT
pascal@4504 91
pascal@4504 92 # Get setup
pascal@4504 93 setupsz=$(getlong $SetupSzOfs $bs)
pascal@4504 94 setupszb=$(( $setupsz & 255 ))
pascal@4504 95 dd if=$KERNEL bs=512 skip=1 count=$setupszb 2> /dev/null >> $bs
pascal@4504 96
pascal@4504 97 # Store cmdline after setup
pascal@4504 98 if [ -n "$CMDLINE" ]; then
pascal@4504 99 echo -n "$CMDLINE" | dd bs=512 count=1 conv=sync 2> /dev/null >> $bs
pascal@4504 100 storelong ArgPtrOfs $(( $SetupBase + $stacktop )) $bs
pascal@4504 101 fi
pascal@4504 102
pascal@4504 103 # Compute initramfs size
pascal@4504 104 initrdlen=0
pascal@4504 105 padding=0
pascal@4504 106 for i in $( echo $INITRD | sed 's/,/ /' ); do
pascal@4504 107 [ -s "$i" ] || continue
pascal@4504 108 initrdlen=$(( $initrdlen + $padding ))
pascal@4504 109 padding=$(stat -c %s $i)
pascal@4504 110 initrdlen=$(( $initrdlen + $padding ))
pascal@4504 111 padding=$(( 4096 - ($padding & 4095) ))
pascal@4504 112 [ $padding -eq 4096 ] && padding=0
pascal@4504 113 done
pascal@4504 114 Ksize=$(( $(getlong $SyssizeOfs $bs)*16 ))
pascal@4504 115 Kpad=$(( (($Ksize+4095)/4096)*4096 - Ksize ))
pascal@4504 116 if [ $initrdlen -ne 0 ]; then
pascal@4504 117 Kbase=$(getlong $CodeAdrOfs $bs)
pascal@4504 118 storelong $RamfsAdrOfs \
pascal@4504 119 $(( (0x1000000 - $initrdlen) & 0xFFFF0000 )) $bs
pascal@4504 120 storelong $RamfsLenOfs $initrdlen $bs
pascal@4504 121 fi
pascal@4504 122
pascal@4504 123 # Output boot sector + setup + cmdline
pascal@4504 124 dd if=$bs 2> /dev/null
pascal@4504 125
pascal@4504 126 # Output kernel code
pascal@4504 127 dd if=$KERNEL bs=512 skip=$(( $setupszb + 1 )) 2> /dev/null
pascal@4504 128
pascal@4504 129 # Pad to next sector
pascal@4504 130 Kpad=$(( 512 - ($(stat -c %s $KERNEL) & 511) ))
pascal@4504 131 [ $Kpad -eq 512 ] || dd if=/dev/zero bs=1 count=$Kpad 2> /dev/null
pascal@4504 132
pascal@4504 133 # Output initramfs
pascal@4504 134 padding=0
pascal@4504 135 for i in $( echo $INITRD | sed 's/,/ /' ); do
pascal@4504 136 [ -s "$i" ] || continue
pascal@4504 137 [ $padding -ne 0 ] && dd if=/dev/zero bs=1 count=$padding
pascal@4504 138 dd if=$i 2> /dev/null
pascal@4504 139 padding=$(( 4096 - ($(stat -c %s $i) & 4095) ))
pascal@4504 140 [ $padding -eq 4096 ] && padding=0
pascal@4504 141 done
pascal@4504 142
pascal@4504 143 # Cleanup
pascal@4504 144 rm -f $bs
pascal@4504 145 }
pascal@4504 146
pascal@4504 147 floppyset | split -b ${FORMAT}k /dev/stdin floppy$$
pascal@4504 148 i=1
pascal@4504 149 ls floppy$$* | while read file ; do
pascal@4504 150 output=$PREFIX.$(printf "%03d" $i)
pascal@4504 151 cat $file /dev/zero | dd bs=1k count=$FORMAT conv=sync of=$output 2> /dev/null
pascal@4504 152 echo $output
pascal@4504 153 rm -f $file
pascal@4504 154 i=$(( $i + 1 ))
pascal@4504 155 done