wok annotate linux/stuff/bootloader.sh @ rev 12599

Up asterisk-addons (1.6.2.4)
author Pascal Bellard <pascal.bellard@slitaz.org>
date Sun Apr 29 08:09:06 2012 +0200 (2012-04-29)
parents 4caf2c7f24c8
children e1f0bb1ee577
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@12557 12 Usage: $0 bzImage [--prefix image_prefix]
pascal@12557 13 [--format 1200|1440|1680|1920|2880|... ] [--mem mb]
pascal@6715 14 [--rdev device] [--video mode] [--flags rootflags] [--tracks cnt]
pascal@12557 15 [--cmdline 'args'] [--dont-edit-cmdline] [--no-syssize-fix]
pascal@12557 16 [--address-initrd address] [--initrd initrdfile]...
pascal@6715 17
pascal@12557 18 Default values: --format 1440 --tracks 80 --rdev /dev/fd0 --prefix floppy. --mem 16
pascal@11175 19
pascal@4504 20 Example:
pascal@12557 21 $0 /boot/bzImage --rdev /dev/ram0 --video -3 --cmdline 'rw lang=fr_FR kmap=fr-latin1 laptop autologin' --initrd /boot/rootfs.gz --initrd ./myconfig.gz
pascal@4504 22 EOT
pascal@4504 23 exit 1
pascal@4504 24 }
pascal@4504 25
pascal@12557 26 KERNEL=""
pascal@12557 27 INITRD=""
pascal@12557 28 ADRSRD=""
pascal@12557 29 CMDLINE=""
pascal@12557 30 PREFIX="floppy."
pascal@12557 31 FORMAT="1440"
pascal@12557 32 RDEV=""
pascal@12557 33 VIDEO=""
pascal@12557 34 FLAGS=""
pascal@12557 35 TRACKS="80"
pascal@12557 36 MEM="16"
pascal@12557 37 NOEDIT=""
pascal@12557 38 NOSYSSIZEFIX=""
pascal@12557 39 DEBUG=""
pascal@12557 40 while [ -n "$1" ]; do
pascal@12557 41 case "${1/--/-}" in
pascal@12557 42 -c*) CMDLINE="$2"; shift;;
pascal@12557 43 -i*) INITRD="$INITRD $2"; shift;;
pascal@12557 44 -a*) ADRSRD="$2"; shift;;
pascal@12557 45 -h*) HEAP="$2"; shift;;
pascal@12557 46 -l*) LOADERTYPE="$2"; shift;;
pascal@12557 47 -p*) PREFIX="$2"; shift;;
pascal@12557 48 -fl*)FLAGS="$2"; shift;; # 1 read-only, 0 read-write
pascal@12557 49 -f*) FORMAT="$2"; shift;;
pascal@12557 50 -m*) MEM="$(echo $2 | sed 's/[^0-9]//g')"; shift;;
pascal@12557 51 -r*) RDEV="$2"; shift;;
pascal@12557 52 -v*) VIDEO="$2"; shift;; # -3 .. n
pascal@12557 53 -t*) TRACKS="$2"; shift;; # likely 81 .. 84
pascal@12557 54 -n*) NOSYSSIZEFIX="1";;
pascal@12557 55 -debug) DEBUG="1";;
pascal@12557 56 -d*) NOEDIT="1";;
pascal@12557 57 *) KERNEL="$1";;
pascal@12557 58 esac
pascal@12557 59 shift
pascal@12557 60 done
pascal@12557 61 [ -n "$KERNEL" -a -f "$KERNEL" ] || usage
pascal@12557 62 while [ -L "$KERNEL" ]; do KERNEL="$(readlink "$KERNEL")"; done
pascal@12557 63 if [ $(( $FORMAT % $TRACKS )) -ne 0 ]; then
pascal@12557 64 echo "Invalid track count for format $FORMAT."
pascal@12557 65 usage
pascal@12557 66 fi
pascal@12557 67 [ 0$MEM -lt 4 ] && MEM=4
pascal@12557 68 [ $MEM -gt 16 ] && MEM=16
pascal@12557 69
pascal@12557 70 ddq() { dd $@ 2> /dev/null; }
pascal@12557 71
pascal@12557 72 patch()
pascal@11175 73 {
pascal@12557 74 echo -en $(echo ":$2" | sed 's/:/\\x/g') | \
pascal@12557 75 ddq bs=1 conv=notrunc of=$3 seek=$((0x$1))
pascal@12557 76 [ -n "$DEBUG" ] && echo "patch $1 $2 $4" 1>&2
pascal@11175 77 }
pascal@4504 78
pascal@12557 79 # usage: store bits offset data file
pascal@12557 80 store()
pascal@6713 81 {
pascal@12557 82 n=$3; for i in $(seq 8 8 $1); do
pascal@12557 83 printf '\\\\x%02X' $(($n & 255))
pascal@12557 84 n=$(($n >> 8))
pascal@12557 85 done | xargs echo -en | ddq bs=1 conv=notrunc of=$4 seek=$(($2))
pascal@12557 86 [ -n "$DEBUG" ] && printf "store%d(%03X) = %0$(($1/4))X %s\n" $1 $2 $3 "$5" 1>&2
pascal@6713 87 }
pascal@6713 88
pascal@12557 89 # usage: getlong offset file
pascal@12557 90 getlong()
pascal@4504 91 {
pascal@12557 92 ddq if=$2 bs=1 skip=$(($1)) count=4 | hexdump -e '"" 1/4 "%d" "\n"'
pascal@4504 93 }
pascal@4504 94
pascal@12557 95 error()
pascal@4504 96 {
pascal@12557 97 echo $@ 1>&2
pascal@12557 98 rm -f $bs
pascal@12557 99 exit 1
pascal@4504 100 }
pascal@4504 101
pascal@4504 102 floppyset()
pascal@4504 103 {
pascal@4504 104 # bzImage offsets
pascal@12557 105 SetupSzOfs=497
pascal@12557 106 FlagsOfs=498
pascal@12557 107 VideoModeOfs=506
pascal@12557 108 RootDevOfs=508
pascal@12557 109 Magic=0x202
pascal@4504 110 RamfsAdrOfs=0x218
pascal@12557 111 RamfsLenOfs=0x21C
pascal@4504 112
pascal@4504 113 # boot+setup address
pascal@4504 114 SetupBase=0x90000
pascal@4504 115
pascal@4504 116 bs=/tmp/bs$$
pascal@4504 117
pascal@4504 118 # Get and patch boot sector
pascal@12563 119 # See http://hg.slitaz.org/wok/raw-file/66e38bd6a132/linux/stuff/linux-header.u
pascal@12557 120 [ -n "$DEBUG" ] && echo "Read bootsector..." 1>&2
pascal@11175 121 ddq if=$KERNEL bs=512 count=1 of=$bs
pascal@12557 122
pascal@12557 123 [ $(( $(getlong 0x1FE $bs) & 0xFFFF )) -eq 43605 ] ||
pascal@12557 124 error "Not bootable"
pascal@12557 125
pascal@11175 126 uudecode <<EOT | ddq of=$bs conv=notrunc
pascal@4504 127 begin-base64 644 -
pascal@12557 128 /L+4nWgAkBeJ/BYHMcC5HgDzq1sfD6Gg8X1AxXd4BlexBvOlFh9kZo9HeMZF
pascal@12557 129 +D/6l1hB6DwBvgACgUwQIIDGRCWbA3QO6GoBWwseKAJ0LFNH6AYBXuhaAbAg
pascal@12557 130 zRCwCM0QTuhZATwIdAOIBK05NigCdPDoMgE8CnXgiHz+W4nm/0gQxkAVk4Dz
pascal@12557 131 CHX0u/QBoRUCsQVmix9mS2bT60NoAAgHv4AAiXwTiUQbAfjR7yn7nHMCAd9Q
pascal@12557 132 V1ZTMdvongBbXlmGzbSHFgfNFVidd9ChGQK7HAKxCTlEG3K6l80T6gAAIJCw
pascal@12557 133 RijIvtgB6MoAXesjgPkTcgQ4wXdrgP4CcgQ45ndsYIH9AAZ0KgZSUVOWtAJQ
pascal@12557 134 sQa1BMHFBLAPIegEkCcUQCfohAD+zXXssCDNEOK06I4AmM0TYVJQKMh3ArAB
pascal@12557 135 mDn4cgKJ+FC0As0TlV5YWnKglUGO6YDHAk90S0519IzplTjBdT+IyP7GsQE4
pascal@12557 136 5nU1iPT+xYD9ULYAdSq1AGC+2wH+RAxT6C8AW+g2AHUWUpjNE7gBAs0TWtDU
pascal@12557 137 OmT+depGCOR15WHrkbAxLAO0DrsHAM0QPA1088OwDejv/6wIwHX4w79sBLFb
pascal@12557 138 ZAINuA0BZDoNdArNFnT0mM0WjudHw1g6AEluc2VydCBkaXNrIDEHDQA=
pascal@4504 139 ====
pascal@4504 140 EOT
pascal@4504 141 # Get setup
pascal@12557 142 setupsz=$(( $(getlong $SetupSzOfs $bs) & 0xFF ))
pascal@12557 143 if [ $setupsz -eq 0 ]; then
pascal@12557 144 setupsz=4
pascal@12557 145 store 8 $SetupSzOfs $setupsz $bs "setup size $setupsz"
pascal@12557 146 fi
pascal@12557 147 [ -n "$DEBUG" ] && echo "Read setup ($setupsz sectors) ..." 1>&2
pascal@11175 148 ddq if=$KERNEL bs=512 skip=1 count=$setupsz >> $bs
pascal@4504 149
pascal@12557 150 Version=$(( $(getlong 0x206 $bs) & 0xFFFF ))
pascal@12557 151 [ $(getlong $Magic $bs) -ne 1400005704 ] && Version=0
pascal@12557 152 feature=""
pascal@12557 153 while read prot kern info ; do
pascal@12557 154 [ $Version -lt $((0x$prot)) ] && continue
pascal@12557 155 feature="features $prot starting from kernel $kern "
pascal@12557 156 done <<EOT
pascal@12557 157 200 1.3.73 kernel_version, bzImage, initrd, loadflags/type_of_loader
pascal@12557 158 201 1.3.76 heap_end_ptr
pascal@12557 159 202 2.4.0 new cmdline
pascal@12557 160 204 2.6.14 long syssize
pascal@12557 161 EOT
pascal@12557 162 [ -n "$DEBUG" ] && printf "Protocol %X $feature\n" $Version 1>&2
pascal@12557 163
pascal@12557 164 # Old kernels need bootsector patches to disable rescent features
pascal@12557 165 while read minversion maxversion offset bytes rem; do
pascal@12557 166 [ $Version -gt $(( 0x$maxversion )) ] && continue
pascal@12557 167 [ $Version -lt $(( 0x$minversion )) ] && continue
pascal@12557 168 patch $offset $bytes $bs "$rem"
pascal@12557 169 done <<EOT
pascal@12557 170 000 1FF 08D B8:00:01 force zImage (movw \$0x100, %ax)
pascal@12557 171 000 1FF 0CB EB:0B skip initrd code
pascal@12557 172 000 201 01E EB:1E:00:00:00:00 room for the cmdline magic
pascal@12557 173 000 201 036 BE:00:00:E8:76:01:EB:0A:06:57:B1:06:F3:A5:EB:DE code in cmdline magic moved
pascal@12557 174 000 1FF 039 90:90:90 no kernel version
pascal@12557 175 000 201 04B 22:00 old cmdline ptr 1
pascal@12557 176 000 201 06D 22:00 old cmdline ptr 2
pascal@12557 177 000 203 1F6 00:00 syssize32
pascal@12557 178 200 FFF 210 FF type_of_loader=FF
pascal@12557 179 201 FFF 224 00:9B heap_end_ptr
pascal@12557 180 EOT
pascal@12557 181 if [ $Version -lt 514 ]; then
pascal@12557 182 version_string=$((0x200 + ($(getlong 0x20E $bs) & 65535) ))
pascal@12557 183 store 16 0x0037 $version_string $bs version_string
pascal@6715 184 fi
pascal@12557 185 if [ $Version -ge 512 -a $(getlong 0x214 $bs) -ge $((0x100000)) ]; then
pascal@12557 186 patch 211 81 $bs loadflags=can_use_heap+loadhigh
pascal@12557 187 patch 09D 10 $bs LOADSEG=0x1000
pascal@12557 188 patch 0A0 00:01 $bs LOADSZ=0x10000
pascal@6713 189 fi
pascal@12557 190 [ -n "$CMDLINE" ] || patch 04D EB $bs "No cmdline"
pascal@12557 191 [ -n "$NOEDIT" ] && patch 059 0D:46:EB:14 $bs 'mov CR,%al ; inc %si; jmp putal'
pascal@12557 192 [ 1$TRACKS -ne 180 ] && store 8 0x171 $TRACKS $bs TRACKS
pascal@12557 193
pascal@12557 194 [ -n "$FLAGS" ] && store 16 $FlagsOfs $FLAGS $bs FLAGS
pascal@12557 195 [ -n "$VIDEO" ] && store 16 $VideoModeOfs $VIDEO $bs VIDEO
pascal@12557 196 [ -n "$RDEV" ] || case "$FORMAT" in
pascal@12557 197 1200) RDEV=0x0208 ;;
pascal@12557 198 1440) RDEV=0x021C ;;
pascal@12557 199 2880) RDEV=0x0220 ;;
pascal@12557 200 *) RDEV=0x0200 ;;
pascal@12557 201 esac
pascal@12557 202 while [ -L "$RDEV" ]; do RDEV="$(readlink "$RDEV")"; done
pascal@12557 203 [ -b "$RDEV" ] && RDEV=$(stat -c '0x%02t%02T' $RDEV 2> /dev/null)
pascal@12557 204 store 16 $RootDevOfs $RDEV $bs RDEV
pascal@12557 205
pascal@12557 206 # Store cmdline after setup
pascal@12557 207 if [ -n "$CMDLINE" ]; then
pascal@12557 208 echo -n "$CMDLINE" | ddq bs=512 count=1 conv=sync >> $bs
pascal@12557 209 CmdlineOfs=0x9E00 # Should be in 0x8000 .. 0xA000
pascal@12557 210 ArgPtrOfs=0x228
pascal@12557 211 ArgPtrVal=$(( $SetupBase + $CmdlineOfs ))
pascal@12557 212 if [ $Version -lt 514 ]; then
pascal@12557 213 ArgPtrOfs=0x0020
pascal@12557 214 ArgPtrVal=$(( 0xA33F + ($CmdlineOfs << 16) ))
pascal@12557 215 fi
pascal@12557 216 store 32 $ArgPtrOfs $ArgPtrVal $bs "Cmdline '$CMDLINE'"
pascal@6713 217 fi
pascal@6713 218
pascal@12557 219 # Compute initramfs size (protocol >= 2.00)
pascal@12557 220 [ $Version -lt 512 ] && INITRD=""
pascal@4504 221 initrdlen=0
pascal@12557 222 INITRDPAD=4
pascal@12557 223 INITRDALIGN=0x1000
pascal@4504 224 for i in $( echo $INITRD | sed 's/,/ /' ); do
pascal@4504 225 [ -s "$i" ] || continue
pascal@12557 226 while [ -L "$i" ]; do i="$(readlink $i)"; done
pascal@12557 227 size=$(( ($(stat -c %s "$i") + $INITRDPAD - 1) & -$INITRDPAD ))
pascal@12557 228 [ -n "$DEBUG" ] && echo "initrd $i $size " 1>&2
pascal@12557 229 initrdlen=$(( $initrdlen + $size ))
pascal@12557 230 [ -n "$ADRSRD" ] || ADRSRD=$(( (($MEM * 0x100000) - $initrdlen) & -$INITRDALIGN ))
pascal@12557 231 store 32 $RamfsAdrOfs $(( $ADRSRD )) $bs initrd adrs
pascal@12557 232 store 32 $RamfsLenOfs $initrdlen $bs initrdlen
pascal@4504 233 done
pascal@12557 234
pascal@12557 235 [ -n "$NOSYSSIZEFIX" ] || store 32 0x1F4 \
pascal@12557 236 $(( ($(stat -c %s $KERNEL)+15)/16 - ($setupsz+1)*32)) $bs fix system size
pascal@4504 237
pascal@4504 238 # Output boot sector + setup + cmdline
pascal@11175 239 ddq if=$bs
pascal@4504 240
pascal@4504 241 # Output kernel code
pascal@12557 242 syssz=$(( ($(getlong 0x1F4 $bs)+31)/32 ))
pascal@12557 243 cat $KERNEL /dev/zero | ddq bs=512 skip=$(( $setupsz+1 )) count=$syssz
pascal@4504 244
pascal@4504 245 # Output initramfs
pascal@4504 246 for i in $( echo $INITRD | sed 's/,/ /' ); do
pascal@4504 247 [ -s "$i" ] || continue
pascal@11175 248 ddq if=$i
pascal@12557 249 padding=$(( $INITRDPAD - ($(stat -c %s $i) % $INITRDPAD) ))
pascal@12557 250 [ $padding -eq $INITRDPAD ] || ddq if=/dev/zero bs=1 count=$padding
pascal@4504 251 done
pascal@4504 252
pascal@4504 253 # Cleanup
pascal@4504 254 rm -f $bs
pascal@4504 255 }
pascal@4504 256
pascal@6715 257 if [ "$FORMAT" == "0" ]; then # unsplitted
pascal@6715 258 floppyset > $PREFIX
pascal@12557 259 PAD=$(( 512 - ($(stat -c %s $PREFIX) % 512) ))
pascal@12557 260 [ $PAD -ne 512 ] && ddq if=/dev/zero bs=1 count=$PAD >> $PREFIX
pascal@6715 261 exit
pascal@6715 262 fi
pascal@4504 263 floppyset | split -b ${FORMAT}k /dev/stdin floppy$$
pascal@4504 264 i=1
pascal@12557 265 ls floppy$$* 2> /dev/null | while read file ; do
pascal@6713 266 output=$PREFIX$(printf "%03d" $i)
pascal@11175 267 cat $file /dev/zero | ddq bs=1k count=$FORMAT conv=sync of=$output
pascal@4504 268 echo $output
pascal@4504 269 rm -f $file
pascal@4504 270 i=$(( $i + 1 ))
pascal@4504 271 done