wok annotate linux-libre/stuff/bootloader.sh @ rev 10111

Up: postfixadmin to 2.3.3.
author Christopher Rogers <slaxemulator@gmail.com>
date Fri May 20 15:31:35 2011 +0000 (2011-05-20)
parents
children 903c03d31ebf
rev   line source
gokhlayeh@9257 1 #!/bin/sh
gokhlayeh@9257 2 #
gokhlayeh@9257 3 # This script creates a floppy image set from a linux bzImage and can merge
gokhlayeh@9257 4 # a cmdline and/or one or more initramfs.
gokhlayeh@9257 5 # The total size can not exceed 15M because INT 15H function 87H limitations.
gokhlayeh@9257 6 #
gokhlayeh@9257 7 # (C) 2009 Pascal Bellard - GNU General Public License v3.
gokhlayeh@9257 8
gokhlayeh@9257 9 usage()
gokhlayeh@9257 10 {
gokhlayeh@9257 11 cat <<EOT
gokhlayeh@9257 12 Usage: $0 bzImage [--prefix image_prefix] [--cmdline 'args']
gokhlayeh@9257 13 [--rdev device] [--video mode] [--flags rootflags] [--tracks cnt]
gokhlayeh@9257 14 [--format 1440|1680|1920|2880 ] [--initrd initrdfile]...
gokhlayeh@9257 15
gokhlayeh@9257 16 Default values: --format 1440 --tracks 80 --prefix floppy.
gokhlayeh@9257 17
gokhlayeh@9257 18 Example:
gokhlayeh@9257 19 $0 /boot/vmlinuz-2.6.30.6 --rdev /dev/ram0 --video -3 --cmdline 'rw lang=fr_FR kmap=fr-latin1 laptop autologin' --initrd /boot/rootfs.gz --initrd ./myconfig.gz
gokhlayeh@9257 20 EOT
gokhlayeh@9257 21 exit 1
gokhlayeh@9257 22 }
gokhlayeh@9257 23
gokhlayeh@9257 24 KERNEL=""
gokhlayeh@9257 25 INITRD=""
gokhlayeh@9257 26 CMDLINE=""
gokhlayeh@9257 27 PREFIX="floppy."
gokhlayeh@9257 28 FORMAT="1440"
gokhlayeh@9257 29 RDEV=""
gokhlayeh@9257 30 VIDEO=""
gokhlayeh@9257 31 FLAGS=""
gokhlayeh@9257 32 TRACKS=""
gokhlayeh@9257 33 DEBUG=""
gokhlayeh@9257 34 while [ -n "$1" ]; do
gokhlayeh@9257 35 case "$1" in
gokhlayeh@9257 36 --c*|-c*) CMDLINE="$2"; shift;;
gokhlayeh@9257 37 --i*|-i*) INITRD="$INITRD $2"; shift;;
gokhlayeh@9257 38 --p*|-p*) PREFIX="$2"; shift;;
gokhlayeh@9257 39 --fo*|-f*) FORMAT="$2"; shift;;
gokhlayeh@9257 40 --fl*) FLAGS="$2"; shift;; # 1 read-only, 0 read-write
gokhlayeh@9257 41 --r*|-r*) RDEV="$2"; shift;; # /dev/???
gokhlayeh@9257 42 --v*|-v*) VIDEO="$2"; shift;; # -3 .. n
gokhlayeh@9257 43 --t*|-t*) TRACKS="$2"; shift;; # likely 81 .. 84
gokhlayeh@9257 44 --debug) DEBUG="1";;
gokhlayeh@9257 45 *) KERNEL="$1";;
gokhlayeh@9257 46 esac
gokhlayeh@9257 47 shift
gokhlayeh@9257 48 done
gokhlayeh@9257 49 [ -n "$KERNEL" -a -f "$KERNEL" ] || usage
gokhlayeh@9257 50 if [ -n "$TRACKS" ]; then
gokhlayeh@9257 51 if [ $(( $FORMAT % $TRACKS )) -ne 0 ]; then
gokhlayeh@9257 52 echo "Invalid track count for format $FORMAT."
gokhlayeh@9257 53 usage
gokhlayeh@9257 54 fi
gokhlayeh@9257 55 fi
gokhlayeh@9257 56
gokhlayeh@9257 57 # write a 16 bits data
gokhlayeh@9257 58 # usage: store16 offset data16 file
gokhlayeh@9257 59 store16()
gokhlayeh@9257 60 {
gokhlayeh@9257 61 n=$2; i=2; while [ $i -ne 0 ]; do
gokhlayeh@9257 62 printf '\\\\x%02X' $(($n & 255))
gokhlayeh@9257 63 i=$(($i-1)); n=$(($n >> 8))
gokhlayeh@9257 64 done | xargs echo -en | \
gokhlayeh@9257 65 dd bs=2 conv=notrunc of=$3 seek=$(( $1 / 2 )) 2> /dev/null
gokhlayeh@9257 66 [ -n "$DEBUG" ] && printf "store16(%04X) = %04X\n" $1 $2 1>&2
gokhlayeh@9257 67 }
gokhlayeh@9257 68
gokhlayeh@9257 69 # write a 32 bits data
gokhlayeh@9257 70 # usage: storelong offset data32 file
gokhlayeh@9257 71 storelong()
gokhlayeh@9257 72 {
gokhlayeh@9257 73 n=$2; i=4; while [ $i -ne 0 ]; do
gokhlayeh@9257 74 printf '\\\\x%02X' $(($n & 255))
gokhlayeh@9257 75 i=$(($i-1)); n=$(($n >> 8))
gokhlayeh@9257 76 done | xargs echo -en | \
gokhlayeh@9257 77 dd bs=4 conv=notrunc of=$3 seek=$(( $1 / 4 )) 2> /dev/null
gokhlayeh@9257 78 [ -n "$DEBUG" ] && printf "storelong(%04X) = %08X\n" $1 $2 1>&2
gokhlayeh@9257 79 }
gokhlayeh@9257 80
gokhlayeh@9257 81 # read a 32 bits data
gokhlayeh@9257 82 # usage: getlong offset file
gokhlayeh@9257 83 getlong()
gokhlayeh@9257 84 {
gokhlayeh@9257 85 dd if=$2 bs=1 skip=$(( $1 )) count=4 2> /dev/null | \
gokhlayeh@9257 86 hexdump -e '"" 1/4 "%d" "\n"'
gokhlayeh@9257 87 }
gokhlayeh@9257 88
gokhlayeh@9257 89 floppyset()
gokhlayeh@9257 90 {
gokhlayeh@9257 91 # bzImage offsets
gokhlayeh@9257 92 CylinderCount=496
gokhlayeh@9257 93 SetupSzOfs=497
gokhlayeh@9257 94 FlagsOfs=498
gokhlayeh@9257 95 SyssizeOfs=500
gokhlayeh@9257 96 VideoModeOfs=506
gokhlayeh@9257 97 RootDevOfs=508
gokhlayeh@9257 98 CodeAdrOfs=0x214
gokhlayeh@9257 99 RamfsAdrOfs=0x218
gokhlayeh@9257 100 RamfsLenOfs=0x21C
gokhlayeh@9257 101 ArgPtrOfs=0x228
gokhlayeh@9257 102
gokhlayeh@9257 103 # boot+setup address
gokhlayeh@9257 104 SetupBase=0x90000
gokhlayeh@9257 105
gokhlayeh@9257 106 stacktop=0x9E00
gokhlayeh@9257 107
gokhlayeh@9257 108 bs=/tmp/bs$$
gokhlayeh@9257 109
gokhlayeh@9257 110 # Get and patch boot sector
gokhlayeh@9257 111 # See http://hg.slitaz.org/wok/raw-file/711d076b277c/linux/stuff/linux-header-2.6.34.u
gokhlayeh@9257 112 dd if=$KERNEL bs=512 count=1 of=$bs 2> /dev/null
gokhlayeh@9257 113 uudecode <<EOT | dd of=$bs conv=notrunc 2> /dev/null
gokhlayeh@9257 114 begin-base64 644 -
gokhlayeh@9257 115 /L+6nWgAkAcGF4n8McC5HQDzq1sfD6mg8X1ABlfFd3ixBvOlZWaPR3gGH8ZF
gokhlayeh@9257 116 +D/6l1hB6DQBvgACA3QO6HYBWwseKAJ0LFNH6AoBXuhmAbAgzRCwCM0QTuhl
gokhlayeh@9257 117 ATwIdAOIBK05NigCdPDoPgE8CnXgiHz+ieb/TBD/TBi/9AGBTRz/gMdFMACc
gokhlayeh@9257 118 sBCxBUi0k4lEHLABiUQUmGaY0+BIZgMFZtPoaAAQB7+AACn4nHMCAccx21BW
gokhlayeh@9257 119 6J4AXrkAgLSH/kQczRVYnXfcoRoCvxwCsQk4RBxyuJPNE+oAACCQsEYoyL7b
gokhlayeh@9257 120 AejSAF3rI4D5E3IEOMF3a4D+AnIEOOZ3bGCB/QAGdCoGUlFTlrQCULEGtQTB
gokhlayeh@9257 121 xQSwDyHoBJAnFEAn6IwA/s117LAgzRDitOiWAJjNE2FSUCjIdwKwAZg5+HIC
gokhlayeh@9257 122 ifhQtALNE5VeWFpyoJVBjuGAxwJPdFFOdfSM4ZU4wXVFiMj+xrEBOOZ1O4j0
gokhlayeh@9257 123 /sW2AID9UHIwOi7wAXIqtQBgvt4B/kQMU+gxAFvoOAB1FlKYzRO4AQLNE1rQ
gokhlayeh@9257 124 1Dpk/nXqRgjkdeVh64sWB7AxLAO0DrsHAM0QPA1088OwDejv/6wIwHX4w79s
gokhlayeh@9257 125 BLFbZQINuA0BZToNdArNFnT0mM0Wju9Hw1g6AEluc2VydCBkaXNrIDEuBw0A
gokhlayeh@9257 126 AA==
gokhlayeh@9257 127 ====
gokhlayeh@9257 128 EOT
gokhlayeh@9257 129
gokhlayeh@9257 130 # Get setup
gokhlayeh@9257 131 setupsz=$(getlong $SetupSzOfs $bs)
gokhlayeh@9257 132 setupszb=$(( $setupsz & 255 ))
gokhlayeh@9257 133 dd if=$KERNEL bs=512 skip=1 count=$setupszb 2> /dev/null >> $bs
gokhlayeh@9257 134
gokhlayeh@9257 135 if [ -n "$TRACKS" ]; then
gokhlayeh@9257 136 [ -n "$DEBUG" ] && echo -n "--tracks " 1>&2
gokhlayeh@9257 137 n=$(getlong $CylinderCount $bs)
gokhlayeh@9257 138 store16 $CylinderCount $(( ($n & -256) + $TRACKS )) $bs
gokhlayeh@9257 139 fi
gokhlayeh@9257 140 if [ -n "$FLAGS" ]; then
gokhlayeh@9257 141 [ -n "$DEBUG" ] && echo -n "--flags " 1>&2
gokhlayeh@9257 142 store16 $FlagsOfs $FLAGS $bs
gokhlayeh@9257 143 fi
gokhlayeh@9257 144 if [ -n "$VIDEO" ]; then
gokhlayeh@9257 145 [ -n "$DEBUG" ] && echo -n "--video " 1>&2
gokhlayeh@9257 146 store16 $VideoModeOfs $VIDEO $bs
gokhlayeh@9257 147 fi
gokhlayeh@9257 148 if [ -n "$RDEV" ]; then
gokhlayeh@9257 149 [ -n "$DEBUG" ] && echo -n "--rdev " 1>&2
gokhlayeh@9257 150 n=$(stat -c '0x%02t%02T' $RDEV 2> /dev/null)
gokhlayeh@9257 151 [ -n "$n" ] || n=$RDEV
gokhlayeh@9257 152 store16 $RootDevOfs $n $bs
gokhlayeh@9257 153 fi
gokhlayeh@9257 154
gokhlayeh@9257 155 # Store cmdline after setup
gokhlayeh@9257 156 if [ -n "$CMDLINE" ]; then
gokhlayeh@9257 157 [ -n "$DEBUG" ] && echo -n "--cmdline '$CMDLINE' " 1>&2
gokhlayeh@9257 158 echo -n "$CMDLINE" | dd bs=512 count=1 conv=sync 2> /dev/null >> $bs
gokhlayeh@9257 159 storelong $ArgPtrOfs $(( $SetupBase + $stacktop )) $bs
gokhlayeh@9257 160 fi
gokhlayeh@9257 161
gokhlayeh@9257 162 # Compute initramfs size
gokhlayeh@9257 163 initrdlen=0
gokhlayeh@9257 164 padding=0
gokhlayeh@9257 165 for i in $( echo $INITRD | sed 's/,/ /' ); do
gokhlayeh@9257 166 [ -s "$i" ] || continue
gokhlayeh@9257 167 [ -n "$DEBUG" ] && echo "--initrd $i " 1>&2
gokhlayeh@9257 168 initrdlen=$(( $initrdlen + $padding ))
gokhlayeh@9257 169 padding=$(stat -c %s $i)
gokhlayeh@9257 170 initrdlen=$(( $initrdlen + $padding ))
gokhlayeh@9257 171 padding=$(( 4096 - ($padding & 4095) ))
gokhlayeh@9257 172 [ $padding -eq 4096 ] && padding=0
gokhlayeh@9257 173 done
gokhlayeh@9257 174 Ksize=$(( $(getlong $SyssizeOfs $bs)*16 ))
gokhlayeh@9257 175 Kpad=$(( (($Ksize+4095)/4096)*4096 - Ksize ))
gokhlayeh@9257 176 if [ $initrdlen -ne 0 ]; then
gokhlayeh@9257 177 [ -n "$DEBUG" ] && echo "initrdlen = $initrdlen " 1>&2
gokhlayeh@9257 178 Kbase=$(getlong $CodeAdrOfs $bs)
gokhlayeh@9257 179 storelong $RamfsAdrOfs \
gokhlayeh@9257 180 $(( (0x1000000 - $initrdlen) & 0xFFFF0000 )) $bs
gokhlayeh@9257 181 storelong $RamfsLenOfs $(( ($initrdlen + 3) & -4 )) $bs
gokhlayeh@9257 182 fi
gokhlayeh@9257 183
gokhlayeh@9257 184 # Output boot sector + setup + cmdline
gokhlayeh@9257 185 dd if=$bs 2> /dev/null
gokhlayeh@9257 186
gokhlayeh@9257 187 # Output kernel code
gokhlayeh@9257 188 dd if=$KERNEL bs=512 skip=$(( $setupszb + 1 )) 2> /dev/null
gokhlayeh@9257 189
gokhlayeh@9257 190 # Pad to next sector
gokhlayeh@9257 191 Kpad=$(( 512 - ($(stat -c %s $KERNEL) & 511) ))
gokhlayeh@9257 192 [ $Kpad -eq 512 ] || dd if=/dev/zero bs=1 count=$Kpad 2> /dev/null
gokhlayeh@9257 193
gokhlayeh@9257 194 # Output initramfs
gokhlayeh@9257 195 padding=0
gokhlayeh@9257 196 for i in $( echo $INITRD | sed 's/,/ /' ); do
gokhlayeh@9257 197 [ -s "$i" ] || continue
gokhlayeh@9257 198 [ $padding -ne 0 ] && dd if=/dev/zero bs=1 count=$padding 2> /dev/null
gokhlayeh@9257 199 dd if=$i 2> /dev/null
gokhlayeh@9257 200 padding=$(( 4 - ($(stat -c %s $i) & 3) ))
gokhlayeh@9257 201 [ $padding -eq 4 ] && padding=0
gokhlayeh@9257 202 done
gokhlayeh@9257 203
gokhlayeh@9257 204 # Cleanup
gokhlayeh@9257 205 rm -f $bs
gokhlayeh@9257 206 }
gokhlayeh@9257 207
gokhlayeh@9257 208 if [ "$FORMAT" == "0" ]; then # unsplitted
gokhlayeh@9257 209 floppyset > $PREFIX
gokhlayeh@9257 210 exit
gokhlayeh@9257 211 fi
gokhlayeh@9257 212 floppyset | split -b ${FORMAT}k /dev/stdin floppy$$
gokhlayeh@9257 213 i=1
gokhlayeh@9257 214 ls floppy$$* | while read file ; do
gokhlayeh@9257 215 output=$PREFIX$(printf "%03d" $i)
gokhlayeh@9257 216 cat $file /dev/zero | dd bs=1k count=$FORMAT conv=sync of=$output 2> /dev/null
gokhlayeh@9257 217 echo $output
gokhlayeh@9257 218 rm -f $file
gokhlayeh@9257 219 i=$(( $i + 1 ))
gokhlayeh@9257 220 done