wok-stable annotate linux/stuff/bootloader.sh @ rev 4511

linux/boot: skip 'floppy changed' warning
author Pascal Bellard <pascal.bellard@slitaz.org>
date Mon Nov 23 22:36:39 2009 +0100 (2009-11-23)
parents b5013b460117
children 7798d8b688a9
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@4504 42 printf "00000 %02X %02X %02X %02X \n" \
pascal@4504 43 $(( $2 & 255 )) $(( ($2>>8) & 255 )) \
pascal@4504 44 $(( ($2>>16) & 255 )) $(( ($2>>24) & 255 )) | \
pascal@4504 45 hexdump -R | dd bs=1 conv=notrunc of=$3 seek=$(( $1 )) 2> /dev/null
pascal@4504 46 }
pascal@4504 47
pascal@4504 48 # read a 32 bits data
pascal@4504 49 # usage: getlong offset file
pascal@4504 50 getlong()
pascal@4504 51 {
pascal@4504 52 dd if=$2 bs=1 skip=$(( $1 )) count=4 2> /dev/null | \
pascal@4504 53 hexdump -e '"" 1/4 "%d" "\n"'
pascal@4504 54 }
pascal@4504 55
pascal@4504 56 floppyset()
pascal@4504 57 {
pascal@4504 58 # bzImage offsets
pascal@4504 59 SetupSzOfs=497
pascal@4504 60 SyssizeOfs=500
pascal@4504 61 CodeAdrOfs=0x214
pascal@4504 62 RamfsAdrOfs=0x218
pascal@4504 63 RamfsLenOfs=0x21C
pascal@4504 64 ArgPtrOfs=0x228
pascal@4504 65
pascal@4504 66 # boot+setup address
pascal@4504 67 SetupBase=0x90000
pascal@4504 68
pascal@4504 69 stacktop=0x9E00
pascal@4504 70
pascal@4504 71 bs=/tmp/bs$$
pascal@4504 72
pascal@4504 73 # Get and patch boot sector
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@4511 77 v/Sd/GgAkAcxyQYXify7eACO2cU3sQbzpY7ZiSeMRwKg8X2YQAYfxkX4P/qz
pascal@4511 78 GFFLdfyXmEHoPgG+AAKATBGAx0QkAJwDdA7oZAG+KAI5HHIuR4scVuhAAV+L
pascal@4511 79 NehQAbAgzRCwCM0QTpjNFjwIdAOIBK07NXTy6CoBPAp14oh8/onmsA+/9AH+
pascal@4511 80 TRyxBbSTiUQcsAGJRBSZiVQQiVQYZjHbQ9PjS2YDHWbT62gAEAe/gAAp+5xz
pascal@4511 81 AgHfU1Yx2+jaAF65AIC0h/5EHM0VW5133KEaAki/HAKxCThEHHKwMcDNE+oA
pascal@4511 82 ACCQsEYoyL65AejCAF3rKYD5E3IEOMF3boD+AnIEOOZ3b4D9UHN5YIH9AAZ0
pascal@4511 83 JwZSUVOWtAJQuQYAUbEEwcUEsA8h6ASQJxRAJ+h1AOLusCDNEFnirpjNE2Ex
pascal@4511 84 9q2RrZKtUCjIdwKwAZg5+HICifhQUrQCzRNalV5YcpYp9wHxweYJAfM4wXUm
pascal@4511 85 iMj+xrEBOOZ1HIj0/sW2ADwTdRKA/VByDbUAYL68AegkAJjNFmGjBABSUWaP
pascal@4511 86 BgAACf91nhYHsDEsA7QOuwcAzRA8DXTzw7AN6O//rAjAdfjDWDoASW5zZXJ0
pascal@4511 87 IG5leHQgZmxvcHB5IGFuZCBwcmVzcyBhbnkga2V5IHRvIGNvbnRpbnVlLgcN
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