wok-tiny annotate bootloader/stuff/usr/bin/bootloader @ rev 142

Remove ashism ==
author Pascal Bellard <pascal.bellard@slitaz.org>
date Wed Feb 27 17:43:23 2019 +0100 (2019-02-27)
parents a3e929634247
children
rev   line source
pascal@93 1 #!/bin/sh
pascal@93 2 #
pascal@93 3 # This script creates a floppy image set from a linux bzImage and can merge
pascal@93 4 # a cmdline and/or one or more initramfs.
pascal@93 5 # The total size can not exceed 15M because INT 15H function 87H limitations.
pascal@93 6 #
pascal@93 7 # (C) 2009 Pascal Bellard - GNU General Public License v3.
pascal@93 8
pascal@93 9 usage()
pascal@93 10 {
pascal@93 11 cat <<EOT
pascal@93 12 Usage: $0 bzImage [--prefix image_prefix] [--cmdline 'args']
pascal@93 13 [--rdev device] [--video mode] [--flags rootflags] [--tracks cnt]
pascal@93 14 [--format 1440|1680|1920|2880 ] [--initrd initrdfile]...
pascal@93 15
pascal@93 16 Default values: --format 1440 --tracks 80 --prefix floppy.
pascal@93 17
pascal@93 18 Example:
pascal@93 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
pascal@93 20 EOT
pascal@93 21 exit 1
pascal@93 22 }
pascal@93 23
pascal@93 24 KERNEL=""
pascal@93 25 INITRD=""
pascal@93 26 CMDLINE=""
pascal@93 27 PREFIX="floppy."
pascal@93 28 FORMAT="1440"
pascal@93 29 RDEV=""
pascal@93 30 VIDEO=""
pascal@93 31 FLAGS=""
pascal@93 32 TRACKS=""
pascal@93 33 DEBUG=""
pascal@93 34 while [ -n "$1" ]; do
pascal@93 35 case "$1" in
pascal@93 36 --c*|-c*) CMDLINE="$2"; shift;;
pascal@93 37 --i*|-i*) INITRD="$INITRD $2"; shift;;
pascal@93 38 --p*|-p*) PREFIX="$2"; shift;;
pascal@93 39 --fo*|-f*) FORMAT="$2"; shift;;
pascal@93 40 --fl*) FLAGS="$2"; shift;; # 1 read-only, 0 read-write
pascal@93 41 --r*|-r*) RDEV="$2"; shift;; # /dev/???
pascal@93 42 --v*|-v*) VIDEO="$2"; shift;; # -3 .. n
pascal@93 43 --t*|-t*) TRACKS="$2"; shift;; # likely 81 .. 84
pascal@93 44 --debug) DEBUG="1";;
pascal@93 45 *) KERNEL="$1";;
pascal@93 46 esac
pascal@93 47 shift
pascal@93 48 done
pascal@93 49 [ -n "$KERNEL" -a -f "$KERNEL" ] || usage
pascal@93 50 if [ -n "$TRACKS" ]; then
pascal@93 51 if [ $(( $FORMAT % $TRACKS )) -ne 0 ]; then
pascal@93 52 echo "Invalid track count for format $FORMAT."
pascal@93 53 usage
pascal@93 54 fi
pascal@93 55 fi
pascal@93 56
pascal@93 57 # write a 16 bits data
pascal@93 58 # usage: store16 offset data16 file
pascal@93 59 store16()
pascal@93 60 {
pascal@93 61 n=$2; i=2; while [ $i -ne 0 ]; do
pascal@93 62 printf '\\\\x%02X' $(($n & 255))
pascal@93 63 i=$(($i-1)); n=$(($n >> 8))
pascal@93 64 done | xargs echo -en | \
pascal@93 65 dd bs=2 conv=notrunc of=$3 seek=$(( $1 / 2 )) 2> /dev/null
pascal@93 66 [ -n "$DEBUG" ] && printf "store16(%04X) = %04X\n" $1 $2 1>&2
pascal@93 67 }
pascal@93 68
pascal@93 69 # write a 32 bits data
pascal@93 70 # usage: storelong offset data32 file
pascal@93 71 storelong()
pascal@93 72 {
pascal@93 73 n=$2; i=4; while [ $i -ne 0 ]; do
pascal@93 74 printf '\\\\x%02X' $(($n & 255))
pascal@93 75 i=$(($i-1)); n=$(($n >> 8))
pascal@93 76 done | xargs echo -en | \
pascal@93 77 dd bs=4 conv=notrunc of=$3 seek=$(( $1 / 4 )) 2> /dev/null
pascal@93 78 [ -n "$DEBUG" ] && printf "storelong(%04X) = %08X\n" $1 $2 1>&2
pascal@93 79 }
pascal@93 80
pascal@93 81 # read a 32 bits data
pascal@93 82 # usage: getlong offset file
pascal@93 83 getlong()
pascal@93 84 {
pascal@93 85 dd if=$2 bs=1 skip=$(( $1 )) count=4 2> /dev/null | \
pascal@93 86 hexdump -e '"" 1/4 "%d" "\n"'
pascal@93 87 }
pascal@93 88
pascal@93 89 floppyset()
pascal@93 90 {
pascal@93 91 # bzImage offsets
pascal@93 92 CylinderCount=496
pascal@93 93 SetupSzOfs=497
pascal@93 94 FlagsOfs=498
pascal@93 95 SyssizeOfs=500
pascal@93 96 VideoModeOfs=506
pascal@93 97 RootDevOfs=508
pascal@93 98 CodeAdrOfs=0x214
pascal@93 99 RamfsAdrOfs=0x218
pascal@93 100 RamfsLenOfs=0x21C
pascal@93 101 ArgPtrOfs=0x228
pascal@93 102
pascal@93 103 # boot+setup address
pascal@93 104 SetupBase=0x90000
pascal@93 105
pascal@93 106 stacktop=0x9E00
pascal@93 107
pascal@93 108 bs=/tmp/bs$$
pascal@93 109
pascal@93 110 # Get and patch boot sector
pascal@93 111 # See http://hg.slitaz.org/wok/raw-file/711d076b277c/linux/stuff/linux-header-2.6.34.u
pascal@93 112 dd if=$KERNEL bs=512 count=1 of=$bs 2> /dev/null
pascal@93 113 uudecode <<EOT | dd of=$bs conv=notrunc 2> /dev/null
pascal@93 114 begin-base64 644 -
pascal@93 115 /L+6nWgAkAcGF4n8McC5HQDzq1sfD6mg8X1ABlfFd3ixBvOlZWaPR3gGH8ZF
pascal@93 116 +D/6l1hB6DQBvgACA3QO6HYBWwseKAJ0LFNH6AoBXuhmAbAgzRCwCM0QTuhl
pascal@93 117 ATwIdAOIBK05NigCdPDoPgE8CnXgiHz+ieb/TBD/TBi/9AGBTRz/gMdFMACc
pascal@93 118 sBCxBUi0k4lEHLABiUQUmGaY0+BIZgMFZtPoaAAQB7+AACn4nHMCAccx21BW
pascal@93 119 6J4AXrkAgLSH/kQczRVYnXfcoRoCvxwCsQk4RBxyuJPNE+oAACCQsEYoyL7b
pascal@93 120 AejSAF3rI4D5E3IEOMF3a4D+AnIEOOZ3bGCB/QAGdCoGUlFTlrQCULEGtQTB
pascal@93 121 xQSwDyHoBJAnFEAn6IwA/s117LAgzRDitOiWAJjNE2FSUCjIdwKwAZg5+HIC
pascal@93 122 ifhQtALNE5VeWFpyoJVBjuGAxwJPdFFOdfSM4ZU4wXVFiMj+xrEBOOZ1O4j0
pascal@93 123 /sW2AID9UHIwOi7wAXIqtQBgvt4B/kQMU+gxAFvoOAB1FlKYzRO4AQLNE1rQ
pascal@93 124 1Dpk/nXqRgjkdeVh64sWB7AxLAO0DrsHAM0QPA1088OwDejv/6wIwHX4w79s
pascal@93 125 BLFbZQINuA0BZToNdArNFnT0mM0Wju9Hw1g6AEluc2VydCBkaXNrIDEuBw0A
pascal@93 126 AA==
pascal@93 127 ====
pascal@93 128 EOT
pascal@93 129
pascal@93 130 # Get setup
pascal@93 131 setupsz=$(getlong $SetupSzOfs $bs)
pascal@93 132 setupszb=$(( $setupsz & 255 ))
pascal@93 133 dd if=$KERNEL bs=512 skip=1 count=$setupszb 2> /dev/null >> $bs
pascal@93 134
pascal@93 135 if [ -n "$TRACKS" ]; then
pascal@93 136 [ -n "$DEBUG" ] && echo -n "--tracks " 1>&2
pascal@93 137 n=$(getlong $CylinderCount $bs)
pascal@93 138 store16 $CylinderCount $(( ($n & -256) + $TRACKS )) $bs
pascal@93 139 fi
pascal@93 140 if [ -n "$FLAGS" ]; then
pascal@93 141 [ -n "$DEBUG" ] && echo -n "--flags " 1>&2
pascal@93 142 store16 $FlagsOfs $FLAGS $bs
pascal@93 143 fi
pascal@93 144 if [ -n "$VIDEO" ]; then
pascal@93 145 [ -n "$DEBUG" ] && echo -n "--video " 1>&2
pascal@93 146 store16 $VideoModeOfs $VIDEO $bs
pascal@93 147 fi
pascal@93 148 if [ -n "$RDEV" ]; then
pascal@93 149 [ -n "$DEBUG" ] && echo -n "--rdev " 1>&2
pascal@93 150 n=$(stat -c '0x%02t%02T' $RDEV 2> /dev/null)
pascal@93 151 [ -n "$n" ] || n=$RDEV
pascal@93 152 store16 $RootDevOfs $n $bs
pascal@93 153 fi
pascal@93 154
pascal@93 155 # Store cmdline after setup
pascal@93 156 if [ -n "$CMDLINE" ]; then
pascal@93 157 [ -n "$DEBUG" ] && echo -n "--cmdline '$CMDLINE' " 1>&2
pascal@93 158 echo -n "$CMDLINE" | dd bs=512 count=1 conv=sync 2> /dev/null >> $bs
pascal@93 159 storelong $ArgPtrOfs $(( $SetupBase + $stacktop )) $bs
pascal@93 160 fi
pascal@93 161
pascal@93 162 # Compute initramfs size
pascal@93 163 initrdlen=0
pascal@93 164 padding=0
pascal@93 165 for i in $( echo $INITRD | sed 's/,/ /' ); do
pascal@93 166 [ -s "$i" ] || continue
pascal@93 167 [ -n "$DEBUG" ] && echo "--initrd $i " 1>&2
pascal@93 168 initrdlen=$(( $initrdlen + $padding ))
pascal@93 169 padding=$(stat -c %s $i)
pascal@93 170 initrdlen=$(( $initrdlen + $padding ))
pascal@93 171 padding=$(( 4096 - ($padding & 4095) ))
pascal@93 172 [ $padding -eq 4096 ] && padding=0
pascal@93 173 done
pascal@93 174 Ksize=$(( $(getlong $SyssizeOfs $bs)*16 ))
pascal@93 175 Kpad=$(( (($Ksize+4095)/4096)*4096 - Ksize ))
pascal@93 176 if [ $initrdlen -ne 0 ]; then
pascal@93 177 [ -n "$DEBUG" ] && echo "initrdlen = $initrdlen " 1>&2
pascal@93 178 Kbase=$(getlong $CodeAdrOfs $bs)
pascal@93 179 storelong $RamfsAdrOfs \
pascal@93 180 $(( (0x1000000 - $initrdlen) & 0xFFFF0000 )) $bs
pascal@93 181 storelong $RamfsLenOfs $(( ($initrdlen + 3) & -4 )) $bs
pascal@93 182 fi
pascal@93 183
pascal@93 184 # Output boot sector + setup + cmdline
pascal@93 185 dd if=$bs 2> /dev/null
pascal@93 186
pascal@93 187 # Output kernel code
pascal@93 188 dd if=$KERNEL bs=512 skip=$(( $setupszb + 1 )) 2> /dev/null
pascal@93 189
pascal@93 190 # Pad to next sector
pascal@93 191 Kpad=$(( 512 - ($(stat -c %s $KERNEL) & 511) ))
pascal@93 192 [ $Kpad -eq 512 ] || dd if=/dev/zero bs=1 count=$Kpad 2> /dev/null
pascal@93 193
pascal@93 194 # Output initramfs
pascal@93 195 padding=0
pascal@93 196 for i in $( echo $INITRD | sed 's/,/ /' ); do
pascal@93 197 [ -s "$i" ] || continue
pascal@93 198 [ $padding -ne 0 ] && dd if=/dev/zero bs=1 count=$padding 2> /dev/null
pascal@93 199 dd if=$i 2> /dev/null
pascal@93 200 padding=$(( 4 - ($(stat -c %s $i) & 3) ))
pascal@93 201 [ $padding -eq 4 ] && padding=0
pascal@93 202 done
pascal@93 203
pascal@93 204 # Cleanup
pascal@93 205 rm -f $bs
pascal@93 206 }
pascal@93 207
pascal@142 208 if [ "$FORMAT" = "0" ]; then # unsplitted
pascal@93 209 floppyset > $PREFIX
pascal@93 210 exit
pascal@93 211 fi
pascal@93 212 floppyset | split -b ${FORMAT}k /dev/stdin floppy$$
pascal@93 213 i=1
pascal@93 214 ls floppy$$* | while read file ; do
pascal@93 215 output=$PREFIX$(printf "%03d" $i)
pascal@93 216 cat $file /dev/zero | dd bs=1k count=$FORMAT conv=sync of=$output 2> /dev/null
pascal@93 217 echo $output
pascal@93 218 rm -f $file
pascal@93 219 i=$(( $i + 1 ))
pascal@93 220 done