slitaz-forge annotate mirror/floppies/builder/bootloader @ rev 572

bootloader: fix multi initrd case
author Pascal Bellard <pascal.bellard@slitaz.org>
date Wed Jul 30 12:24:36 2014 +0200 (2014-07-30)
parents e6e4be1b2591
children a37f4ff3d549
rev   line source
pascal@265 1 #!/bin/sh
pascal@265 2 #
pascal@265 3 # This script creates a floppy image set from a linux bzImage and can merge
pascal@265 4 # a cmdline and/or one or more initramfs.
pascal@265 5 # The total size can not exceed 15M because INT 15H function 87H limitations.
pascal@265 6 #
pascal@265 7 # (C) 2009 Pascal Bellard - GNU General Public License v3.
pascal@265 8
pascal@265 9 usage()
pascal@265 10 {
pascal@265 11 cat <<EOT
pascal@366 12 Usage: $0 bzImage [--prefix image_prefix] [--info file ]
pascal@366 13 [--format 1200|1440|1680|1920|2880|... ] [--mem mb]
pascal@265 14 [--rdev device] [--video mode] [--flags rootflags] [--tracks cnt]
pascal@366 15 [--cmdline 'args'] [--dont-edit-cmdline] [--no-syssize-fix]
pascal@366 16 [--address-initrd address] [--initrd initrdfile]...
pascal@265 17
pascal@366 18 Default values: --format 1440 --tracks 80 --rdev /dev/fd0 --prefix floppy. --mem 16
pascal@265 19
pascal@265 20 Example:
pascal@366 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@265 22 EOT
pascal@265 23 exit 1
pascal@265 24 }
pascal@265 25
pascal@265 26 KERNEL=""
pascal@265 27 INITRD=""
pascal@366 28 ADRSRD=""
pascal@265 29 CMDLINE=""
pascal@265 30 PREFIX="floppy."
pascal@265 31 FORMAT="1440"
pascal@265 32 RDEV=""
pascal@265 33 VIDEO=""
pascal@265 34 FLAGS=""
pascal@366 35 TRACKS="80"
pascal@366 36 MEM="16"
pascal@366 37 NOEDIT=""
pascal@366 38 NOSYSSIZEFIX=""
pascal@366 39 INFOFILE=""
pascal@265 40 DEBUG=""
pascal@265 41 while [ -n "$1" ]; do
pascal@366 42 case "${1/--/-}" in
pascal@366 43 -c*) CMDLINE="$2"; shift;;
pascal@366 44 -inf*) INFOFILE="$2"; shift;;
pascal@366 45 -i*) INITRD="$INITRD $2"; shift;;
pascal@366 46 -a*) ADRSRD="$2"; shift;;
pascal@366 47 -h*) HEAP="$2"; shift;;
pascal@366 48 -l*) LOADERTYPE="$2"; shift;;
pascal@366 49 -p*) PREFIX="$2"; shift;;
pascal@366 50 -fl*)FLAGS="$2"; shift;; # 1 read-only, 0 read-write
pascal@366 51 -f*) FORMAT="$2"; shift;;
pascal@366 52 -m*) MEM="$(echo $2 | sed 's/[^0-9]//g')"; shift;;
pascal@366 53 -r*) RDEV="$2"; shift;;
pascal@366 54 -v*) VIDEO="$2"; shift;; # -3 .. n
pascal@366 55 -t*) TRACKS="$2"; shift;; # likely 81 .. 84
pascal@366 56 -n*) NOSYSSIZEFIX="1";;
pascal@366 57 -debug) DEBUG="1";;
pascal@366 58 -d*) NOEDIT="1";;
pascal@265 59 *) KERNEL="$1";;
pascal@265 60 esac
pascal@265 61 shift
pascal@265 62 done
pascal@265 63 [ -n "$KERNEL" -a -f "$KERNEL" ] || usage
pascal@366 64 while [ -L "$KERNEL" ]; do KERNEL="$(readlink "$KERNEL")"; done
pascal@366 65 if [ $(( $FORMAT % $TRACKS )) -ne 0 ]; then
pascal@366 66 echo "Invalid track count for format $FORMAT."
pascal@366 67 usage
pascal@265 68 fi
pascal@366 69 [ 0$MEM -lt 4 ] && MEM=4
pascal@366 70 [ $MEM -gt 16 ] && MEM=16
pascal@265 71
pascal@366 72 ddq() { dd $@ 2> /dev/null; }
pascal@366 73
pascal@366 74 patch()
pascal@265 75 {
pascal@366 76 echo -en $(echo ":$2" | sed 's/:/\\x/g') | \
pascal@366 77 ddq bs=1 conv=notrunc of=$3 seek=$((0x$1))
pascal@366 78 [ -n "$DEBUG" ] && echo "patch $1 $2 $4" 1>&2
pascal@265 79 }
pascal@265 80
pascal@366 81 # usage: store bits offset data file
pascal@366 82 store()
pascal@265 83 {
pascal@366 84 n=$3; for i in $(seq 8 8 $1); do
pascal@366 85 printf '\\\\x%02X' $(($n & 255))
pascal@366 86 n=$(($n >> 8))
pascal@366 87 done | xargs echo -en | ddq bs=1 conv=notrunc of=$4 seek=$(($2))
pascal@366 88 [ -n "$DEBUG" ] && printf "store%d(%03X) = %0$(($1/4))X %s\n" $1 $2 $3 "$5" 1>&2
pascal@265 89 }
pascal@265 90
pascal@265 91 # usage: getlong offset file
pascal@265 92 getlong()
pascal@265 93 {
pascal@366 94 ddq if=$2 bs=1 skip=$(($1)) count=4 | hexdump -e '"" 1/4 "%d" "\n"'
pascal@366 95 }
pascal@366 96
pascal@366 97 error()
pascal@366 98 {
pascal@366 99 echo $@ 1>&2
pascal@366 100 rm -f $bs
pascal@366 101 exit 1
pascal@265 102 }
pascal@265 103
pascal@265 104 floppyset()
pascal@265 105 {
pascal@265 106 # bzImage offsets
pascal@265 107 SetupSzOfs=497
pascal@265 108 FlagsOfs=498
pascal@265 109 VideoModeOfs=506
pascal@265 110 RootDevOfs=508
pascal@366 111 Magic=0x202
pascal@265 112 RamfsAdrOfs=0x218
pascal@265 113 RamfsLenOfs=0x21C
pascal@265 114
pascal@265 115 # boot+setup address
pascal@265 116 SetupBase=0x90000
pascal@265 117
pascal@265 118 bs=/tmp/bs$$
pascal@265 119
pascal@265 120 # Get and patch boot sector
pascal@366 121 # See http://hg.slitaz.org/wok/raw-file/66e38bd6a132/linux/stuff/linux-header.u
pascal@366 122 [ -n "$DEBUG" ] && echo "Read bootsector..." 1>&2
pascal@366 123 ddq if=$KERNEL bs=512 count=1 of=$bs
pascal@366 124
pascal@366 125 [ $(( $(getlong 0x1FE $bs) & 0xFFFF )) -eq 43605 ] ||
pascal@366 126 error "Not bootable"
pascal@366 127
pascal@366 128 uudecode <<EOT | ddq of=$bs conv=notrunc
pascal@265 129 begin-base64 644 -
pascal@366 130 /L+4nWgAkBeJ/BYHMcC5HgDzq1sfD6Gg8X1AxXd4BlexBvOlFh9kZo9HeMZF
pascal@366 131 +D/6l1hB6DwBvgACgUwQIIDGRCWbA3QO6GoBWwseKAJ0LFNH6AYBXuhaAbAg
pascal@366 132 zRCwCM0QTuhZATwIdAOIBK05NigCdPDoMgE8CnXgiHz+W4nm/0gQxkAVk4Dz
pascal@366 133 CHX0u/QBoRUCsQVmix9mS2bT60NoAAgHv4AAiXwTiUQbAfjR7yn7nHMCAd9Q
pascal@366 134 V1ZTMdvongBbXlmGzbSHFgfNFVidd9ChGQK7HAKxCTlEG3K6l80T6gAAIJCw
pascal@366 135 RijIvtgB6MoAXesjgPkTcgQ4wXdrgP4CcgQ45ndsYIH9AAZ0KgZSUVOWtAJQ
pascal@366 136 sQa1BMHFBLAPIegEkCcUQCfohAD+zXXssCDNEOK06I4AmM0TYVJQKMh3ArAB
pascal@366 137 mDn4cgKJ+FC0As0TlV5YWnKglUGO6YDHAk90S0519IzplTjBdT+IyP7GsQE4
pascal@366 138 5nU1iPT+xYD9ULYAdSq1AGC+2wH+RAxT6C8AW+g2AHUWUpjNE7gBAs0TWtDU
pascal@366 139 OmT+depGCOR15WHrkbAxLAO0DrsHAM0QPA1088OwDejv/6wIwHX4w79sBLFb
pascal@366 140 ZAINuA0BZDoNdArNFnT0mM0WjudHw1g6AEluc2VydCBkaXNrIDEHDQA=
pascal@265 141 ====
pascal@265 142 EOT
pascal@366 143 # Get setup
pascal@366 144 setupsz=$(( $(getlong $SetupSzOfs $bs) & 0xFF ))
pascal@366 145 if [ $setupsz -eq 0 ]; then
pascal@366 146 setupsz=4
pascal@366 147 store 8 $SetupSzOfs $setupsz $bs "setup size $setupsz"
pascal@366 148 fi
pascal@366 149 [ -n "$DEBUG" ] && echo "Read setup ($setupsz sectors) ..." 1>&2
pascal@366 150 ddq if=$KERNEL bs=512 skip=1 count=$setupsz >> $bs
pascal@265 151
pascal@366 152 Version=$(( $(getlong 0x206 $bs) & 0xFFFF ))
pascal@366 153 [ $(getlong $Magic $bs) -ne 1400005704 ] && Version=0
pascal@366 154 feature=""
pascal@366 155 while read prot kern info ; do
pascal@366 156 [ $Version -lt $((0x$prot)) ] && continue
pascal@366 157 feature="features $prot starting from kernel $kern "
pascal@366 158 done <<EOT
pascal@366 159 200 1.3.73 kernel_version, bzImage, initrd, loadflags/type_of_loader
pascal@366 160 201 1.3.76 heap_end_ptr
pascal@366 161 202 2.4.0 new cmdline
pascal@366 162 204 2.6.14 long syssize
pascal@366 163 EOT
pascal@366 164 [ -n "$DEBUG" ] && printf "Protocol %X $feature\n" $Version 1>&2
pascal@366 165
pascal@366 166 # Old kernels need bootsector patches to disable rescent features
pascal@366 167 while read minversion maxversion offset bytes rem; do
pascal@366 168 [ $Version -gt $(( 0x$maxversion )) ] && continue
pascal@366 169 [ $Version -lt $(( 0x$minversion )) ] && continue
pascal@366 170 patch $offset $bytes $bs "$rem"
pascal@366 171 done <<EOT
pascal@366 172 000 1FF 08D B8:00:01 force zImage (movw \$0x100, %ax)
pascal@366 173 000 1FF 0CB EB:0B skip initrd code
pascal@366 174 000 201 01E EB:1E:00:00:00:00 room for the cmdline magic
pascal@366 175 000 201 036 BE:00:00:E8:76:01:EB:0A:06:57:B1:06:F3:A5:EB:DE code in cmdline magic moved
pascal@366 176 000 1FF 039 90:90:90 no kernel version
pascal@366 177 000 201 04B 22:00 old cmdline ptr 1
pascal@366 178 000 201 06D 22:00 old cmdline ptr 2
pascal@366 179 000 203 1F6 00:00 syssize32
pascal@366 180 200 FFF 210 FF type_of_loader=FF
pascal@366 181 201 FFF 224 00:9B heap_end_ptr
pascal@366 182 EOT
pascal@366 183 if [ $Version -lt 514 ]; then
pascal@366 184 version_string=$((0x200 + ($(getlong 0x20E $bs) & 65535) ))
pascal@366 185 store 16 0x0037 $version_string $bs version_string
pascal@366 186 fi
pascal@366 187 if [ $Version -ge 512 -a $(getlong 0x214 $bs) -ge $((0x100000)) ]; then
pascal@366 188 patch 211 81 $bs loadflags=can_use_heap+loadhigh
pascal@366 189 patch 09D 10 $bs LOADSEG=0x1000
pascal@366 190 patch 0A0 00:01 $bs LOADSZ=0x10000
pascal@366 191 fi
pascal@366 192 [ -n "$CMDLINE" ] || patch 04D EB $bs "No cmdline"
pascal@366 193 [ -n "$NOEDIT" ] && patch 059 0D:46:EB:14 $bs 'mov CR,%al ; inc %si; jmp putal'
pascal@366 194 [ 1$TRACKS -ne 180 ] && store 8 0x171 $TRACKS $bs TRACKS
pascal@366 195
pascal@366 196 [ -n "$FLAGS" ] && store 16 $FlagsOfs $FLAGS $bs FLAGS
pascal@366 197 [ -n "$VIDEO" ] && store 16 $VideoModeOfs $VIDEO $bs VIDEO
pascal@366 198 [ -n "$RDEV" ] || case "$FORMAT" in
pascal@366 199 1200) RDEV=0x0208 ;;
pascal@366 200 1440) RDEV=0x021C ;;
pascal@366 201 2880) RDEV=0x0220 ;;
pascal@366 202 *) RDEV=0x0200 ;;
pascal@366 203 esac
pascal@366 204 while [ -L "$RDEV" ]; do RDEV="$(readlink "$RDEV")"; done
pascal@366 205 [ -b "$RDEV" ] && RDEV=$(stat -c '0x%02t%02T' $RDEV 2> /dev/null)
pascal@366 206 store 16 $RootDevOfs $RDEV $bs RDEV
pascal@265 207
pascal@366 208 [ $FORMAT -lt 1440 ] && store 8 0xEF 16 $bs 1.2M
pascal@366 209 [ $FORMAT -lt 1200 ] && store 8 0xEF 10 $bs 720K
pascal@366 210 [ $FORMAT -lt 720 ] && store 8 0x171 40 $bs 360K
pascal@366 211 [ $FORMAT -lt 360 ] && store 8 0xEF 9 $bs 320K
pascal@366 212 [ $FORMAT -lt 320 ] && store 8 0xF8 2 $bs 160K
pascal@366 213
pascal@366 214 # Info text after setup
pascal@366 215 if [ -s "$INFOFILE" ]; then
pascal@366 216 patch 048 9a:00:00:00:90 $bs lcall displayinfo
pascal@366 217 uudecode >$bs.infotext <<EOT
pascal@366 218 begin-base64 644 -
pascal@366 219 MdsGYI7D6AAAXoHGSgCJ8MHoCUii8QGwDbQOuwcAzRCsPAx1I79sBLFbJgIN
pascal@366 220 uBsBJjoNdAnNFnT0mM0Wjsc8IHPjPBt0BuvPCMB1zWEHCx4oAss=
pascal@366 221 ====
pascal@366 222 EOT
pascal@366 223 cat "$INFOFILE" >>$bs.infotext
pascal@366 224 if [ $Version -lt 514 ]; then
pascal@366 225 store 16 0x050 0x0022 $bs.infotext
pascal@265 226 fi
pascal@366 227 ddq if=/dev/zero bs=512 count=1 >>$bs.infotext
pascal@366 228 n=$(($(stat -c %s $bs.infotext)/512))
pascal@366 229 ddq if=$bs.infotext count=$n bs=512 >> $bs
pascal@366 230 rm -f $bs.infotext
pascal@366 231 store 8 0x1F1 $(($setupsz+$n)) $bs update setup size
pascal@366 232 store 8 0x04A $((2+2*$setupsz)) $bs update displayinfo call
pascal@265 233 fi
pascal@265 234
pascal@366 235 # Store cmdline after setup for kernels >= 0.99
pascal@265 236 if [ -n "$CMDLINE" ]; then
pascal@366 237 echo -n "$CMDLINE" | ddq bs=512 count=1 conv=sync >> $bs
pascal@366 238 CmdlineOfs=0x9E00 # Should be in 0x8000 .. 0xA000
pascal@366 239 ArgPtrOfs=0x228
pascal@366 240 ArgPtrVal=$(( $SetupBase + $CmdlineOfs ))
pascal@366 241 if [ $Version -lt 514 ]; then
pascal@366 242 ArgPtrOfs=0x0020
pascal@366 243 ArgPtrVal=$(( 0xA33F + ($CmdlineOfs << 16) ))
pascal@366 244 fi
pascal@366 245 store 32 $ArgPtrOfs $ArgPtrVal $bs "Cmdline '$CMDLINE'"
pascal@265 246 fi
pascal@265 247
pascal@366 248 # Compute initramfs size (protocol >= 2.00)
pascal@366 249 [ $Version -lt 512 ] && INITRD=""
pascal@265 250 initrdlen=0
pascal@366 251 INITRDPAD=4
pascal@366 252 INITRDALIGN=0x1000
pascal@265 253 for i in $( echo $INITRD | sed 's/,/ /' ); do
pascal@265 254 [ -s "$i" ] || continue
pascal@366 255 while [ -L "$i" ]; do i="$(readlink $i)"; done
pascal@366 256 size=$(( ($(stat -c %s "$i") + $INITRDPAD - 1) & -$INITRDPAD ))
pascal@366 257 [ -n "$DEBUG" ] && echo "initrd $i $size " 1>&2
pascal@366 258 initrdlen=$(( $initrdlen + $size ))
pascal@572 259 ADRSRD=$(( (($MEM * 0x100000) - $initrdlen) & -$INITRDALIGN ))
pascal@366 260 store 32 $RamfsAdrOfs $(( $ADRSRD )) $bs initrd adrs
pascal@366 261 store 32 $RamfsLenOfs $initrdlen $bs initrdlen
pascal@265 262 done
pascal@366 263
pascal@366 264 [ -n "$NOSYSSIZEFIX" ] || store 32 0x1F4 \
pascal@366 265 $(( ($(stat -c %s $KERNEL)+15)/16 - ($setupsz+1)*32)) $bs fix system size
pascal@265 266
pascal@265 267 # Output boot sector + setup + cmdline
pascal@366 268 ddq if=$bs
pascal@265 269
pascal@265 270 # Output kernel code
pascal@366 271 syssz=$(( ($(getlong 0x1F4 $bs)+31)/32 ))
pascal@366 272 cat $KERNEL /dev/zero | ddq bs=512 skip=$(( $setupsz+1 )) count=$syssz conv=sync
pascal@265 273
pascal@265 274 # Output initramfs
pascal@265 275 for i in $( echo $INITRD | sed 's/,/ /' ); do
pascal@265 276 [ -s "$i" ] || continue
pascal@366 277 ddq if=$i
pascal@366 278 padding=$(( $INITRDPAD - ($(stat -c %s $i) % $INITRDPAD) ))
pascal@366 279 [ $padding -eq $INITRDPAD ] || ddq if=/dev/zero bs=1 count=$padding
pascal@265 280 done
pascal@265 281
pascal@265 282 # Cleanup
pascal@265 283 rm -f $bs
pascal@265 284 }
pascal@265 285
pascal@265 286 if [ "$FORMAT" == "0" ]; then # unsplitted
pascal@265 287 floppyset > $PREFIX
pascal@265 288 PAD=$(( 512 - ($(stat -c %s $PREFIX) % 512) ))
pascal@366 289 [ $PAD -ne 512 ] && ddq if=/dev/zero bs=1 count=$PAD >> $PREFIX
pascal@265 290 exit
pascal@265 291 fi
pascal@265 292 floppyset | split -b ${FORMAT}k /dev/stdin floppy$$
pascal@265 293 i=1
pascal@366 294 ls floppy$$* 2> /dev/null | while read file ; do
pascal@265 295 output=$PREFIX$(printf "%03d" $i)
pascal@366 296 cat $file /dev/zero | ddq bs=1k count=$FORMAT conv=sync of=$output
pascal@265 297 echo $output
pascal@265 298 rm -f $file
pascal@265 299 i=$(( $i + 1 ))
pascal@265 300 done