wok-6.x annotate linux/stuff/bootloader.sh @ rev 6714

linux/bootloader.sh: align initrdlen to 32bits
author Pascal Bellard <pascal.bellard@slitaz.org>
date Thu Oct 14 13:41:19 2010 +0200 (2010-10-14)
parents e86c6b88aff0
children 39cb6f60c89e
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@6713 13 [--rdev device] [--video mode] [--flags rootflags]
pascal@4504 14 [--format 1440|1680|1720|2880 ] [--initrd initrdfile]...
pascal@4504 15
pascal@4504 16 Example:
pascal@6713 17 $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@4504 18 EOT
pascal@4504 19 exit 1
pascal@4504 20 }
pascal@4504 21
pascal@4504 22 KERNEL=""
pascal@4504 23 INITRD=""
pascal@4504 24 CMDLINE=""
pascal@6713 25 PREFIX="floppy."
pascal@4504 26 FORMAT="1440"
pascal@6713 27 RDEV=""
pascal@6713 28 VIDEO=""
pascal@6713 29 FLAGS=""
pascal@6713 30 DEBUG=""
pascal@4504 31 while [ -n "$1" ]; do
pascal@4504 32 case "$1" in
pascal@6713 33 --c*|-c*) CMDLINE="$2"; shift;;
pascal@6713 34 --i*|-i*) INITRD="$INITRD $2"; shift;;
pascal@6713 35 --p*|-p*) PREFIX="$2"; shift;;
pascal@6713 36 --fo*|-f*) FORMAT="$2"; shift;;
pascal@6713 37 --fl*) FLAGS="$2"; shift;; # 1 read-only, 0 read-write
pascal@6713 38 --r*|-r*) RDEV="$2"; shift;; # /dev/???
pascal@6713 39 --v*|-v*) VIDEO="$2"; shift;; # -3 .. n
pascal@6713 40 --debug) DEBUG="1";;
pascal@4504 41 *) KERNEL="$1";;
pascal@4504 42 esac
pascal@4504 43 shift
pascal@4504 44 done
pascal@4504 45 [ -n "$KERNEL" -a -f "$KERNEL" ] || usage
pascal@4504 46
pascal@6713 47 # write a 16 bits data
pascal@6713 48 # usage: store16 offset data16 file
pascal@6713 49 store16()
pascal@6713 50 {
pascal@6713 51 echo $2 | awk '{ printf "\\\\x%02X\\\\x%02X",$1%256,($1/256)%256 }' | \
pascal@6713 52 xargs echo -en | \
pascal@6713 53 dd bs=2 conv=notrunc of=$3 seek=$(( $1 / 2 )) 2> /dev/null
pascal@6713 54 [ -n "$DEBUG" ] && printf "store16(%04X) = %04X\n" $1 $2 1>&2
pascal@6713 55 }
pascal@6713 56
pascal@4504 57 # write a 32 bits data
pascal@4504 58 # usage: storelong offset data32 file
pascal@4504 59 storelong()
pascal@4504 60 {
pascal@6713 61 echo $2 | awk '{ printf "\\\\x%02X\\\\x%02X\\\\x%02X\\\\x%02X",
pascal@6713 62 $1%256,($1/256)%256,($1/256/256)%256,($1/256/256/256)%256 }' | \
pascal@6713 63 xargs echo -en | \
pascal@6713 64 dd bs=4 conv=notrunc of=$3 seek=$(( $1 / 4 )) 2> /dev/null
pascal@6713 65 [ -n "$DEBUG" ] && printf "storelong(%04X) = %08X\n" $1 $2 1>&2
pascal@4504 66 }
pascal@4504 67
pascal@4504 68 # read a 32 bits data
pascal@4504 69 # usage: getlong offset file
pascal@4504 70 getlong()
pascal@4504 71 {
pascal@4504 72 dd if=$2 bs=1 skip=$(( $1 )) count=4 2> /dev/null | \
pascal@4504 73 hexdump -e '"" 1/4 "%d" "\n"'
pascal@4504 74 }
pascal@4504 75
pascal@4504 76 floppyset()
pascal@4504 77 {
pascal@4504 78 # bzImage offsets
pascal@4504 79 SetupSzOfs=497
pascal@6713 80 FlagsOfs=498
pascal@4504 81 SyssizeOfs=500
pascal@6713 82 VideoModeOfs=506
pascal@6713 83 RootDevOfs=508
pascal@4504 84 CodeAdrOfs=0x214
pascal@4504 85 RamfsAdrOfs=0x218
pascal@4504 86 RamfsLenOfs=0x21C
pascal@4504 87 ArgPtrOfs=0x228
pascal@4504 88
pascal@4504 89 # boot+setup address
pascal@4504 90 SetupBase=0x90000
pascal@4504 91
pascal@4504 92 stacktop=0x9E00
pascal@4504 93
pascal@4504 94 bs=/tmp/bs$$
pascal@4504 95
pascal@4504 96 # Get and patch boot sector
pascal@5939 97 # See http://hg.slitaz.org/wok/raw-file/711d076b277c/linux/stuff/linux-header-2.6.34.u
pascal@4504 98 dd if=$KERNEL bs=512 count=1 of=$bs 2> /dev/null
pascal@4504 99 uudecode <<EOT | dd of=$bs conv=notrunc 2> /dev/null
pascal@4504 100 begin-base64 644 -
pascal@5424 101 /L+6nWgAkAcGF4n8McC5HQDzq1sfD6mg8X1ABlfFd3ixBvOlZWaPR3gGH8ZF
pascal@5424 102 +D/6l1hB6DQBvgACA3QO6HYBWwseKAJ0LFNH6AoBXuhmAbAgzRCwCM0QTuhl
pascal@5424 103 ATwIdAOIBK05NigCdPDoPgE8CnXgiHz+ieb/TBD/TBi/9AGBTRz/gMdFMACc
pascal@5424 104 sBCxBUi0k4lEHLABiUQUmGaY0+BIZgMFZtPoaAAQB7+AACn4nHMCAccx21BW
pascal@5424 105 6J4AXrkAgLSH/kQczRVYnXfcoRoCvxwCsQk4RBxyuJPNE+oAACCQsEYoyL7b
pascal@5424 106 AejSAF3rI4D5E3IEOMF3a4D+AnIEOOZ3bGCB/QAGdCoGUlFTlrQCULEGtQTB
pascal@5424 107 xQSwDyHoBJAnFEAn6IwA/s117LAgzRDitOiWAJjNE2FSUCjIdwKwAZg5+HIC
pascal@5424 108 ifhQtALNE5VeWFpyoJVBjuGAxwJPdFFOdfSM4ZU4wXVFiMj+xrEBOOZ1O4j0
pascal@5424 109 /sW2AID9UHIwOi7wAXIqtQBgvt4B/kQMU+gxAFvoOAB1FlKYzRO4AQLNE1rQ
pascal@5424 110 1Dpk/nXqRgjkdeVh64sWB7AxLAO0DrsHAM0QPA1088OwDejv/6wIwHX4w79s
pascal@5424 111 BLFbZQINuA0BZToNdArNFnT0mM0Wju9Hw1g6AEluc2VydCBkaXNrIDEuBw0A
pascal@4511 112 AA==
pascal@4504 113 ====
pascal@4504 114 EOT
pascal@4504 115
pascal@4504 116 # Get setup
pascal@4504 117 setupsz=$(getlong $SetupSzOfs $bs)
pascal@4504 118 setupszb=$(( $setupsz & 255 ))
pascal@4504 119 dd if=$KERNEL bs=512 skip=1 count=$setupszb 2> /dev/null >> $bs
pascal@4504 120
pascal@6713 121 if [ -n "$FLAGS" ]; then
pascal@6713 122 [ -n "$DEBUG" ] && echo -n "--flags " 1>&2
pascal@6713 123 store16 $FlagsOfs $(( $FLAGS )) $bs
pascal@6713 124 fi
pascal@6713 125 if [ -n "$VIDEO" ]; then
pascal@6713 126 [ -n "$DEBUG" ] && echo -n "--video " 1>&2
pascal@6713 127 store16 $VideoModeOfs $(( $VIDEO )) $bs
pascal@6713 128 fi
pascal@6713 129 if [ -n "$RDEV" ]; then
pascal@6713 130 [ -n "$DEBUG" ] && echo -n "--rdev " 1>&2
pascal@6713 131 n=$(stat -c '0x%02t%02T' $RDEV 2> /dev/null)
pascal@6713 132 [ -n "$n" ] || n=$RDEV
pascal@6713 133 store16 $RootDevOfs $(( $n )) $bs
pascal@6713 134 fi
pascal@6713 135
pascal@4504 136 # Store cmdline after setup
pascal@4504 137 if [ -n "$CMDLINE" ]; then
pascal@6713 138 [ -n "$DEBUG" ] && echo -n "--cmdline '$CMDLINE' " 1>&2
pascal@4504 139 echo -n "$CMDLINE" | dd bs=512 count=1 conv=sync 2> /dev/null >> $bs
pascal@6713 140 storelong $ArgPtrOfs $(( $SetupBase + $stacktop )) $bs
pascal@4504 141 fi
pascal@4504 142
pascal@4504 143 # Compute initramfs size
pascal@4504 144 initrdlen=0
pascal@4504 145 padding=0
pascal@4504 146 for i in $( echo $INITRD | sed 's/,/ /' ); do
pascal@4504 147 [ -s "$i" ] || continue
pascal@6713 148 [ -n "$DEBUG" ] && echo "--initrd $i " 1>&2
pascal@4504 149 initrdlen=$(( $initrdlen + $padding ))
pascal@4504 150 padding=$(stat -c %s $i)
pascal@4504 151 initrdlen=$(( $initrdlen + $padding ))
pascal@4504 152 padding=$(( 4096 - ($padding & 4095) ))
pascal@4504 153 [ $padding -eq 4096 ] && padding=0
pascal@4504 154 done
pascal@4504 155 Ksize=$(( $(getlong $SyssizeOfs $bs)*16 ))
pascal@4504 156 Kpad=$(( (($Ksize+4095)/4096)*4096 - Ksize ))
pascal@4504 157 if [ $initrdlen -ne 0 ]; then
pascal@6713 158 [ -n "$DEBUG" ] && echo "initrdlen = $initrdlen " 1>&2
pascal@4504 159 Kbase=$(getlong $CodeAdrOfs $bs)
pascal@4504 160 storelong $RamfsAdrOfs \
pascal@4504 161 $(( (0x1000000 - $initrdlen) & 0xFFFF0000 )) $bs
pascal@6714 162 storelong $RamfsLenOfs $(( ($initrdlen + 3) & -4 )) $bs
pascal@4504 163 fi
pascal@4504 164
pascal@4504 165 # Output boot sector + setup + cmdline
pascal@4504 166 dd if=$bs 2> /dev/null
pascal@4504 167
pascal@4504 168 # Output kernel code
pascal@4504 169 dd if=$KERNEL bs=512 skip=$(( $setupszb + 1 )) 2> /dev/null
pascal@4504 170
pascal@4504 171 # Pad to next sector
pascal@4504 172 Kpad=$(( 512 - ($(stat -c %s $KERNEL) & 511) ))
pascal@4504 173 [ $Kpad -eq 512 ] || dd if=/dev/zero bs=1 count=$Kpad 2> /dev/null
pascal@4504 174
pascal@4504 175 # Output initramfs
pascal@4504 176 padding=0
pascal@4504 177 for i in $( echo $INITRD | sed 's/,/ /' ); do
pascal@4504 178 [ -s "$i" ] || continue
pascal@6713 179 [ $padding -ne 0 ] && dd if=/dev/zero bs=1 count=$padding 2> /dev/null
pascal@4504 180 dd if=$i 2> /dev/null
pascal@6713 181 padding=$(( 4 - ($(stat -c %s $i) & 3) ))
pascal@6713 182 [ $padding -eq 4 ] && padding=0
pascal@4504 183 done
pascal@4504 184
pascal@4504 185 # Cleanup
pascal@4504 186 rm -f $bs
pascal@4504 187 }
pascal@4504 188
pascal@4504 189 floppyset | split -b ${FORMAT}k /dev/stdin floppy$$
pascal@4504 190 i=1
pascal@4504 191 ls floppy$$* | while read file ; do
pascal@6713 192 output=$PREFIX$(printf "%03d" $i)
pascal@4504 193 cat $file /dev/zero | dd bs=1k count=$FORMAT conv=sync of=$output 2> /dev/null
pascal@4504 194 echo $output
pascal@4504 195 rm -f $file
pascal@4504 196 i=$(( $i + 1 ))
pascal@4504 197 done