wok-stable annotate linux/stuff/bootloader.sh @ rev 12465

Up e2fsprogs (1.44.2)
author Pascal Bellard <pascal.bellard@slitaz.org>
date Mon Mar 04 18:42:23 2019 +0100 (2019-03-04)
parents 7d497422d803
children
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@6715 13 [--rdev device] [--video mode] [--flags rootflags] [--tracks cnt]
pascal@6715 14 [--format 1440|1680|1920|2880 ] [--initrd initrdfile]...
pascal@6715 15
pascal@6715 16 Default values: --format 1440 --tracks 80 --prefix floppy.
pascal@4504 17
pascal@11175 18 Or: cat fd0*.img | $0 --extract
pascal@11175 19
pascal@11175 20 Create the kernel, cmdline and rootfs files from a floppy set
pascal@11175 21
pascal@4504 22 Example:
pascal@11175 23 $0 /boot/vmlinuz-2.6.30.6 --rdev /dev/ram0 --video -3 \
pascal@11175 24 --cmdline 'rw lang=fr_FR kmap=fr-latin1 laptop autologin' \
pascal@11175 25 --initrd /boot/rootfs.gz --initrd ./myconfig.gz
pascal@4504 26 EOT
pascal@4504 27 exit 1
pascal@4504 28 }
pascal@4504 29
pascal@11175 30 ddq()
pascal@11175 31 {
pascal@11175 32 dd $@ 2> /dev/null
pascal@11175 33 }
pascal@4504 34
pascal@11175 35 dbg()
pascal@6713 36 {
pascal@11175 37 [ -n "$DEBUG" ] && echo "$@" 1>&2
pascal@6713 38 }
pascal@6713 39
pascal@4504 40 # write a 32 bits data
pascal@11175 41 # usage: put offset data32 file [bytes]
pascal@11175 42 put()
pascal@4504 43 {
pascal@11175 44 n=$2; for i in $(seq 1 ${4:-4}); do
pascal@8399 45 printf '\\\\x%02X' $(($n & 255))
pascal@11175 46 n=$(($n >> 8))
pascal@11175 47 done | xargs echo -en | ddq bs=1 conv=notrunc of=$3 seek=$1
pascal@11175 48 [ -n "$DEBUG" ] && printf "put$4(%04X) = %X\n" $1 $2 1>&2
pascal@4504 49 }
pascal@4504 50
pascal@4504 51 # read a 32 bits data
pascal@11175 52 # usage: get offset file [bytes]
pascal@11175 53 get()
pascal@4504 54 {
pascal@11175 55 ddq if=$2 bs=1 skip=$(($1)) count=${3:-4} | hexdump -e '"" 1/4 "%d"'
pascal@4504 56 }
pascal@4504 57
pascal@11175 58 SetupSzOfs=0x1F1
pascal@11175 59 SyssizeOfs=0x1F4
pascal@11175 60 RamfsLenOfs=0x21C
pascal@11175 61 ArgPtrOfs=0x228
pascal@11175 62
pascal@4504 63 floppyset()
pascal@4504 64 {
pascal@4504 65 # bzImage offsets
pascal@11175 66 CylinderCount=0x1F0
pascal@11175 67 FlagsOfs=0x1F2
pascal@11175 68 VideoModeOfs=0x1FA
pascal@11175 69 RootDevOfs=0x1FC
pascal@4504 70 CodeAdrOfs=0x214
pascal@4504 71 RamfsAdrOfs=0x218
pascal@4504 72
pascal@4504 73 # boot+setup address
pascal@4504 74 SetupBase=0x90000
pascal@4504 75
pascal@4504 76 stacktop=0x9E00
pascal@4504 77
pascal@4504 78 bs=/tmp/bs$$
pascal@4504 79
pascal@4504 80 # Get and patch boot sector
pascal@5939 81 # See http://hg.slitaz.org/wok/raw-file/711d076b277c/linux/stuff/linux-header-2.6.34.u
pascal@11175 82 ddq if=$KERNEL bs=512 count=1 of=$bs
pascal@11175 83 uudecode <<EOT | ddq of=$bs conv=notrunc
pascal@4504 84 begin-base64 644 -
pascal@5424 85 /L+6nWgAkAcGF4n8McC5HQDzq1sfD6mg8X1ABlfFd3ixBvOlZWaPR3gGH8ZF
pascal@5424 86 +D/6l1hB6DQBvgACA3QO6HYBWwseKAJ0LFNH6AoBXuhmAbAgzRCwCM0QTuhl
pascal@5424 87 ATwIdAOIBK05NigCdPDoPgE8CnXgiHz+ieb/TBD/TBi/9AGBTRz/gMdFMACc
pascal@5424 88 sBCxBUi0k4lEHLABiUQUmGaY0+BIZgMFZtPoaAAQB7+AACn4nHMCAccx21BW
pascal@5424 89 6J4AXrkAgLSH/kQczRVYnXfcoRoCvxwCsQk4RBxyuJPNE+oAACCQsEYoyL7b
pascal@5424 90 AejSAF3rI4D5E3IEOMF3a4D+AnIEOOZ3bGCB/QAGdCoGUlFTlrQCULEGtQTB
pascal@5424 91 xQSwDyHoBJAnFEAn6IwA/s117LAgzRDitOiWAJjNE2FSUCjIdwKwAZg5+HIC
pascal@5424 92 ifhQtALNE5VeWFpyoJVBjuGAxwJPdFFOdfSM4ZU4wXVFiMj+xrEBOOZ1O4j0
pascal@5424 93 /sW2AID9UHIwOi7wAXIqtQBgvt4B/kQMU+gxAFvoOAB1FlKYzRO4AQLNE1rQ
pascal@5424 94 1Dpk/nXqRgjkdeVh64sWB7AxLAO0DrsHAM0QPA1088OwDejv/6wIwHX4w79s
pascal@5424 95 BLFbZQINuA0BZToNdArNFnT0mM0Wju9Hw1g6AEluc2VydCBkaXNrIDEuBw0A
pascal@4511 96 AA==
pascal@4504 97 ====
pascal@4504 98 EOT
pascal@4504 99
pascal@4504 100 # Get setup
pascal@11175 101 setupsz=$(get $SetupSzOfs $bs 1)
pascal@11175 102 ddq if=$KERNEL bs=512 skip=1 count=$setupsz >> $bs
pascal@4504 103
pascal@6715 104 if [ -n "$TRACKS" ]; then
pascal@11175 105 dbg -n "--tracks "
pascal@11175 106 put $CylinderCount $TRACKS $bs 1
pascal@6715 107 fi
pascal@6713 108 if [ -n "$FLAGS" ]; then
pascal@11175 109 dbg -n "--flags "
pascal@11175 110 put $FlagsOfs $FLAGS $bs 2
pascal@6713 111 fi
pascal@6713 112 if [ -n "$VIDEO" ]; then
pascal@11175 113 dbg -n "--video "
pascal@11175 114 put $VideoModeOfs $VIDEO $bs 2
pascal@6713 115 fi
pascal@6713 116 if [ -n "$RDEV" ]; then
pascal@11175 117 dbg -n "--rdev "
pascal@6713 118 n=$(stat -c '0x%02t%02T' $RDEV 2> /dev/null)
pascal@6713 119 [ -n "$n" ] || n=$RDEV
pascal@11175 120 put $RootDevOfs $n $bs 2
pascal@6713 121 fi
pascal@6713 122
pascal@4504 123 # Store cmdline after setup
pascal@4504 124 if [ -n "$CMDLINE" ]; then
pascal@11175 125 dbg -n "--cmdline '$CMDLINE' "
pascal@11175 126 echo -n "$CMDLINE" | ddq bs=512 count=1 conv=sync >> $bs
pascal@11175 127 put $ArgPtrOfs $(( $SetupBase + $stacktop )) $bs
pascal@4504 128 fi
pascal@4504 129
pascal@4504 130 # Compute initramfs size
pascal@4504 131 initrdlen=0
pascal@4504 132 padding=0
pascal@4504 133 for i in $( echo $INITRD | sed 's/,/ /' ); do
pascal@4504 134 [ -s "$i" ] || continue
pascal@11175 135 dbg "--initrd $i "
pascal@4504 136 initrdlen=$(( $initrdlen + $padding ))
pascal@4504 137 padding=$(stat -c %s $i)
pascal@4504 138 initrdlen=$(( $initrdlen + $padding ))
pascal@4504 139 padding=$(( 4096 - ($padding & 4095) ))
pascal@4504 140 [ $padding -eq 4096 ] && padding=0
pascal@4504 141 done
pascal@11175 142 Ksize=$(( $(get $SyssizeOfs $bs)*16 ))
pascal@4504 143 Kpad=$(( (($Ksize+4095)/4096)*4096 - Ksize ))
pascal@4504 144 if [ $initrdlen -ne 0 ]; then
pascal@11175 145 dbg "initrdlen = $initrdlen "
pascal@11175 146 Kbase=$(get $CodeAdrOfs $bs)
pascal@11175 147 put $RamfsAdrOfs \
pascal@4504 148 $(( (0x1000000 - $initrdlen) & 0xFFFF0000 )) $bs
pascal@11175 149 put $RamfsLenOfs $(( ($initrdlen + 3) & -4 )) $bs
pascal@4504 150 fi
pascal@4504 151
pascal@4504 152 # Output boot sector + setup + cmdline
pascal@11175 153 ddq if=$bs
pascal@4504 154
pascal@4504 155 # Output kernel code
pascal@11175 156 ddq if=$KERNEL bs=512 skip=$(( $setupsz + 1 ))
pascal@4504 157
pascal@4504 158 # Pad to next sector
pascal@4504 159 Kpad=$(( 512 - ($(stat -c %s $KERNEL) & 511) ))
pascal@11175 160 [ $Kpad -eq 512 ] || ddq if=/dev/zero bs=1 count=$Kpad
pascal@4504 161
pascal@4504 162 # Output initramfs
pascal@4504 163 padding=0
pascal@4504 164 for i in $( echo $INITRD | sed 's/,/ /' ); do
pascal@4504 165 [ -s "$i" ] || continue
pascal@11175 166 [ $padding -ne 0 ] && ddq if=/dev/zero bs=1 count=$padding
pascal@11175 167 ddq if=$i
pascal@6713 168 padding=$(( 4 - ($(stat -c %s $i) & 3) ))
pascal@6713 169 [ $padding -eq 4 ] && padding=0
pascal@4504 170 done
pascal@4504 171
pascal@4504 172 # Cleanup
pascal@4504 173 rm -f $bs
pascal@4504 174 }
pascal@4504 175
pascal@11175 176 KERNEL=""
pascal@11175 177 INITRD=""
pascal@11175 178 CMDLINE=""
pascal@11175 179 PREFIX="floppy."
pascal@11175 180 FORMAT="1440"
pascal@11175 181 RDEV=""
pascal@11175 182 VIDEO=""
pascal@11175 183 FLAGS=""
pascal@11175 184 TRACKS=""
pascal@11175 185 DEBUG=""
pascal@11175 186 while [ -n "$1" ]; do
pascal@11175 187 case "${1/--/-}" in
pascal@11175 188 -c*) CMDLINE="$2"; shift;;
pascal@11175 189 -i*) INITRD="$INITRD $2"; shift;;
pascal@11175 190 -p*) PREFIX="$2"; shift;;
pascal@11175 191 -fl*) FLAGS="$2"; shift;; # 1 read-only, 0 read-write
pascal@11175 192 -f*) FORMAT="$2"; shift;;
pascal@11175 193 -r*) RDEV="$2"; shift;; # /dev/???
pascal@11175 194 -v*) VIDEO="$2"; shift;; # -3 .. n
pascal@11175 195 -t*) TRACKS="$2"; shift;; # likely 81 .. 84
pascal@11175 196 -d*) DEBUG="1";;
pascal@11175 197 -e*) ddq bs=512 count=2 > kernel
pascal@11175 198 setupsz=$(get $SetupSzOfs kernel 1)
pascal@11175 199 ddq bs=512 count=$(($setupsz - 1)) >> kernel
pascal@11175 200 [ $(get $ArgPtrOfs kernel) -ne 0 ] &&
pascal@11175 201 ddq bs=512 count=1 | strings > cmdline
pascal@11175 202 syssz=$(get $SyssizeOfs kernel)
pascal@11175 203 ddq bs=512 count=$(( ($syssz + 31) / 32 )) >> kernel
pascal@11175 204 ddq bs=16 seek=$(($syssz + 32 + $setupsz*32)) count=0 of=kernel
pascal@11175 205 ramsz=$(get $RamfsLenOfs kernel)
pascal@11175 206 ddq bs=512 count=$((($ramsz + 511) / 512)) of=rootfs
pascal@11175 207 ddq bs=1 seek=$ramsz count=0 of=rootfs
pascal@11175 208 exit ;;
pascal@11175 209 *) KERNEL="$1";;
pascal@11175 210 esac
pascal@11175 211 shift
pascal@11175 212 done
pascal@11175 213 [ -n "$KERNEL" -a -f "$KERNEL" ] || usage
pascal@11175 214 [ -n "$TRACKS" ] && [ $(( $FORMAT % $TRACKS )) -ne 0 ] &&
pascal@11175 215 echo "Invalid track count for format $FORMAT." && usage
pascal@11175 216
pascal@6715 217 if [ "$FORMAT" == "0" ]; then # unsplitted
pascal@6715 218 floppyset > $PREFIX
pascal@6715 219 exit
pascal@6715 220 fi
pascal@4504 221 floppyset | split -b ${FORMAT}k /dev/stdin floppy$$
pascal@4504 222 i=1
pascal@4504 223 ls floppy$$* | while read file ; do
pascal@6713 224 output=$PREFIX$(printf "%03d" $i)
pascal@11175 225 cat $file /dev/zero | ddq bs=1k count=$FORMAT conv=sync of=$output
pascal@4504 226 echo $output
pascal@4504 227 rm -f $file
pascal@4504 228 i=$(( $i + 1 ))
pascal@4504 229 done