wok-undigest annotate linux/stuff/bootloader.sh @ rev 1089

linux: config+config64 => CONFIG_EFI=y
author Richard Dunbar <mojo@slitaz.org>
date Mon Dec 30 16:29:37 2013 +0000 (2013-12-30)
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erjo@1087 1 #!/bin/sh
erjo@1087 2 #
erjo@1087 3 # This script creates a floppy image set from a linux bzImage and can merge
erjo@1087 4 # a cmdline and/or one or more initramfs.
erjo@1087 5 # The total size can not exceed 15M because INT 15H function 87H limitations.
erjo@1087 6 #
erjo@1087 7 # (C) 2009 Pascal Bellard - GNU General Public License v3.
erjo@1087 8
erjo@1087 9 usage()
erjo@1087 10 {
erjo@1087 11 cat <<EOT
erjo@1087 12 Usage: $0 bzImage [--prefix image_prefix] [--info file ]
erjo@1087 13 [--format 1200|1440|1680|1920|2880|... ] [--mem mb]
erjo@1087 14 [--rdev device] [--video mode] [--flags rootflags] [--tracks cnt]
erjo@1087 15 [--cmdline 'args'] [--dont-edit-cmdline] [--no-syssize-fix]
erjo@1087 16 [--address-initrd address] [--initrd initrdfile]...
erjo@1087 17
erjo@1087 18 Default values: --format 1440 --tracks 80 --rdev /dev/fd0 --prefix floppy. --mem 16
erjo@1087 19
erjo@1087 20 Example:
erjo@1087 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
erjo@1087 22 EOT
erjo@1087 23 exit 1
erjo@1087 24 }
erjo@1087 25
erjo@1087 26 KERNEL=""
erjo@1087 27 INITRD=""
erjo@1087 28 ADRSRD=""
erjo@1087 29 CMDLINE=""
erjo@1087 30 PREFIX="floppy."
erjo@1087 31 FORMAT="1440"
erjo@1087 32 RDEV=""
erjo@1087 33 VIDEO=""
erjo@1087 34 FLAGS=""
erjo@1087 35 TRACKS="80"
erjo@1087 36 MEM="16"
erjo@1087 37 NOEDIT=""
erjo@1087 38 NOSYSSIZEFIX=""
erjo@1087 39 INFOFILE=""
erjo@1087 40 DEBUG=""
erjo@1087 41 while [ -n "$1" ]; do
erjo@1087 42 case "${1/--/-}" in
erjo@1087 43 -c*) CMDLINE="$2"; shift;;
erjo@1087 44 -inf*) INFOFILE="$2"; shift;;
erjo@1087 45 -i*) INITRD="$INITRD $2"; shift;;
erjo@1087 46 -a*) ADRSRD="$2"; shift;;
erjo@1087 47 -h*) HEAP="$2"; shift;;
erjo@1087 48 -l*) LOADERTYPE="$2"; shift;;
erjo@1087 49 -p*) PREFIX="$2"; shift;;
erjo@1087 50 -fl*)FLAGS="$2"; shift;; # 1 read-only, 0 read-write
erjo@1087 51 -f*) FORMAT="$2"; shift;;
erjo@1087 52 -m*) MEM="$(echo $2 | sed 's/[^0-9]//g')"; shift;;
erjo@1087 53 -r*) RDEV="$2"; shift;;
erjo@1087 54 -v*) VIDEO="$2"; shift;; # -3 .. n
erjo@1087 55 -t*) TRACKS="$2"; shift;; # likely 81 .. 84
erjo@1087 56 -n*) NOSYSSIZEFIX="1";;
erjo@1087 57 -debug) DEBUG="1";;
erjo@1087 58 -d*) NOEDIT="1";;
erjo@1087 59 *) KERNEL="$1";;
erjo@1087 60 esac
erjo@1087 61 shift
erjo@1087 62 done
erjo@1087 63 [ -n "$KERNEL" -a -f "$KERNEL" ] || usage
erjo@1087 64 while [ -L "$KERNEL" ]; do KERNEL="$(readlink "$KERNEL")"; done
erjo@1087 65 if [ $(( $FORMAT % $TRACKS )) -ne 0 ]; then
erjo@1087 66 echo "Invalid track count for format $FORMAT."
erjo@1087 67 usage
erjo@1087 68 fi
erjo@1087 69 [ 0$MEM -lt 4 ] && MEM=4
erjo@1087 70 [ $MEM -gt 16 ] && MEM=16
erjo@1087 71
erjo@1087 72 ddq() { dd $@ 2> /dev/null; }
erjo@1087 73
erjo@1087 74 patch()
erjo@1087 75 {
erjo@1087 76 echo -en $(echo ":$2" | sed 's/:/\\x/g') | \
erjo@1087 77 ddq bs=1 conv=notrunc of=$3 seek=$((0x$1))
erjo@1087 78 [ -n "$DEBUG" ] && echo "patch $1 $2 $4" 1>&2
erjo@1087 79 }
erjo@1087 80
erjo@1087 81 # usage: store bits offset data file
erjo@1087 82 store()
erjo@1087 83 {
erjo@1087 84 n=$3; for i in $(seq 8 8 $1); do
erjo@1087 85 printf '\\\\x%02X' $(($n & 255))
erjo@1087 86 n=$(($n >> 8))
erjo@1087 87 done | xargs echo -en | ddq bs=1 conv=notrunc of=$4 seek=$(($2))
erjo@1087 88 [ -n "$DEBUG" ] && printf "store%d(%03X) = %0$(($1/4))X %s\n" $1 $2 $3 "$5" 1>&2
erjo@1087 89 }
erjo@1087 90
erjo@1087 91 # usage: getlong offset file [bytes]
erjo@1087 92 getlong()
erjo@1087 93 {
erjo@1087 94 echo $(od -j $1 -N ${3:-4} -t u${3:-4} -An $2)
erjo@1087 95 }
erjo@1087 96
erjo@1087 97 error()
erjo@1087 98 {
erjo@1087 99 echo $@ 1>&2
erjo@1087 100 rm -f $bs
erjo@1087 101 exit 1
erjo@1087 102 }
erjo@1087 103
erjo@1087 104 floppyset()
erjo@1087 105 {
erjo@1087 106 # bzImage offsets
erjo@1087 107 SetupSzOfs=497
erjo@1087 108 FlagsOfs=498
erjo@1087 109 VideoModeOfs=506
erjo@1087 110 RootDevOfs=508
erjo@1087 111 Magic=0x202
erjo@1087 112 RamfsAdrOfs=0x218
erjo@1087 113 RamfsLenOfs=0x21C
erjo@1087 114
erjo@1087 115 # boot+setup address
erjo@1087 116 SetupBase=0x90000
erjo@1087 117
erjo@1087 118 bs=/tmp/bs$$
erjo@1087 119
erjo@1087 120 # Get and patch boot sector
erjo@1087 121 # See http://hg.slitaz.org/wok/raw-file/66e38bd6a132/linux/stuff/linux-header.u
erjo@1087 122 [ -n "$DEBUG" ] && echo "Read bootsector..." 1>&2
erjo@1087 123 ddq if=$KERNEL bs=512 count=1 of=$bs
erjo@1087 124
erjo@1087 125 [ $(getlong 0x1FE $bs 2) -eq 43605 ] || error "Not bootable"
erjo@1087 126
erjo@1087 127 uudecode <<EOT | ddq of=$bs conv=notrunc
erjo@1087 128 begin-base64 644 -
erjo@1087 129 /L+4nWgAkBeJ/BYHMcC5HgDzq1sfD6Gg8X1AxXd4BlexBvOlFh9kZo9HeMZF
erjo@1087 130 +D/6l1hB6DwBvgACgUwQIIDGRCWbA3QO6GoBWwseKAJ0LFNH6AYBXuhaAbAg
erjo@1087 131 zRCwCM0QTuhZATwIdAOIBK05NigCdPDoMgE8CnXgiHz+W4nm/0gQxkAVk4Dz
erjo@1087 132 CHX0u/QBoRUCsQVmix9mS2bT60NoAAgHv4AAiXwTiUQbAfjR7yn7nHMCAd9Q
erjo@1087 133 V1ZTMdvongBbXlmGzbSHFgfNFVidd9ChGQK7HAKxCTlEG3K6l80T6gAAIJCw
erjo@1087 134 RijIvtgB6MoAXesjgPkTcgQ4wXdrgP4CcgQ45ndsYIH9AAZ0KgZSUVOWtAJQ
erjo@1087 135 sQa1BMHFBLAPIegEkCcUQCfohAD+zXXssCDNEOK06I4AmM0TYVJQKMh3ArAB
erjo@1087 136 mDn4cgKJ+FC0As0TlV5YWnKglUGO6YDHAk90S0519IzplTjBdT+IyP7GsQE4
erjo@1087 137 5nU1iPT+xYD9ULYAdSq1AGC+2wH+RAxT6C8AW+g2AHUWUpjNE7gBAs0TWtDU
erjo@1087 138 OmT+depGCOR15WHrkbAxLAO0DrsHAM0QPA1088OwDejv/6wIwHX4w79sBLFb
erjo@1087 139 ZAINuA0BZDoNdArNFnT0mM0WjudHw1g6AEluc2VydCBkaXNrIDEHDQA=
erjo@1087 140 ====
erjo@1087 141 EOT
erjo@1087 142 # Get setup
erjo@1087 143 setupsz=$(getlong $SetupSzOfs $bs 1)
erjo@1087 144 if [ $setupsz -eq 0 ]; then
erjo@1087 145 setupsz=4
erjo@1087 146 store 8 $SetupSzOfs $setupsz $bs "setup size $setupsz"
erjo@1087 147 fi
erjo@1087 148 [ -n "$DEBUG" ] && echo "Read setup ($setupsz sectors) ..." 1>&2
erjo@1087 149 ddq if=$KERNEL bs=512 skip=1 count=$setupsz >> $bs
erjo@1087 150
erjo@1087 151 Version=$(getlong 0x206 $bs 2)
erjo@1087 152 [ $(getlong $Magic $bs) -ne 1400005704 ] && Version=0
erjo@1087 153 feature=""
erjo@1087 154 while read prot kern info ; do
erjo@1087 155 [ $Version -lt $((0x$prot)) ] && continue
erjo@1087 156 feature="features $prot starting from kernel $kern "
erjo@1087 157 done <<EOT
erjo@1087 158 200 1.3.73 kernel_version, bzImage, initrd, loadflags/type_of_loader
erjo@1087 159 201 1.3.76 heap_end_ptr
erjo@1087 160 202 2.4.0 new cmdline
erjo@1087 161 204 2.6.14 long syssize
erjo@1087 162 EOT
erjo@1087 163 [ -n "$DEBUG" ] && printf "Protocol %X $feature\n" $Version 1>&2
erjo@1087 164
erjo@1087 165 # Old kernels need bootsector patches to disable rescent features
erjo@1087 166 while read minversion maxversion offset bytes rem; do
erjo@1087 167 [ $Version -gt $(( 0x$maxversion )) ] && continue
erjo@1087 168 [ $Version -lt $(( 0x$minversion )) ] && continue
erjo@1087 169 patch $offset $bytes $bs "$rem"
erjo@1087 170 done <<EOT
erjo@1087 171 000 1FF 08D B8:00:01 force zImage (movw \$0x100, %ax)
erjo@1087 172 000 1FF 0CB EB:0B skip initrd code
erjo@1087 173 000 201 01E EB:1E:00:00:00:00 room for the cmdline magic
erjo@1087 174 000 201 036 BE:00:00:E8:76:01:EB:0A:06:57:B1:06:F3:A5:EB:DE code in cmdline magic moved
erjo@1087 175 000 1FF 039 90:90:90 no kernel version
erjo@1087 176 000 201 04B 22:00 old cmdline ptr 1
erjo@1087 177 000 201 06D 22:00 old cmdline ptr 2
erjo@1087 178 000 203 1F6 00:00 syssize32
erjo@1087 179 200 FFF 210 FF type_of_loader=FF
erjo@1087 180 201 FFF 224 00:9B heap_end_ptr
erjo@1087 181 EOT
erjo@1087 182 if [ $Version -lt 514 ]; then
erjo@1087 183 version_string=$((0x200 + $(getlong 0x20E $bs 2) ))
erjo@1087 184 store 16 0x0037 $version_string $bs version_string
erjo@1087 185 fi
erjo@1087 186 if [ $Version -ge 512 -a $(getlong 0x214 $bs) -ge $((0x100000)) ]; then
erjo@1087 187 patch 211 81 $bs loadflags=can_use_heap+loadhigh
erjo@1087 188 patch 09D 10 $bs LOADSEG=0x1000
erjo@1087 189 patch 0A0 00:01 $bs LOADSZ=0x10000
erjo@1087 190 fi
erjo@1087 191 [ -n "$CMDLINE" ] || patch 04D EB $bs "No cmdline"
erjo@1087 192 [ -n "$NOEDIT" ] && patch 059 0D:46:EB:14 $bs 'mov CR,%al ; inc %si; jmp putal'
erjo@1087 193 [ 1$TRACKS -ne 180 ] && store 8 0x171 $TRACKS $bs TRACKS
erjo@1087 194
erjo@1087 195 [ -n "$FLAGS" ] && store 16 $FlagsOfs $FLAGS $bs FLAGS
erjo@1087 196 [ -n "$VIDEO" ] && store 16 $VideoModeOfs $VIDEO $bs VIDEO
erjo@1087 197 [ -n "$RDEV" ] || case "$FORMAT" in
erjo@1087 198 1200) RDEV=0x0208 ;;
erjo@1087 199 1440) RDEV=0x021C ;;
erjo@1087 200 2880) RDEV=0x0220 ;;
erjo@1087 201 *) RDEV=0x0200 ;;
erjo@1087 202 esac
erjo@1087 203 while [ -L "$RDEV" ]; do RDEV="$(readlink "$RDEV")"; done
erjo@1087 204 [ -b "$RDEV" ] && RDEV=$(stat -c '0x%02t%02T' $RDEV 2> /dev/null)
erjo@1087 205 store 16 $RootDevOfs $RDEV $bs RDEV
erjo@1087 206
erjo@1087 207 [ $FORMAT -lt 1440 ] && store 8 0xEF 16 $bs 1.2M
erjo@1087 208 [ $FORMAT -lt 1200 ] && store 8 0xEF 10 $bs 720K
erjo@1087 209 [ $FORMAT -lt 720 ] && store 8 0x171 40 $bs 360K
erjo@1087 210 [ $FORMAT -lt 360 ] && store 8 0xEF 9 $bs 320K
erjo@1087 211 [ $FORMAT -lt 320 ] && store 8 0xF8 2 $bs 160K
erjo@1087 212
erjo@1087 213 # Info text after setup
erjo@1087 214 if [ -s "$INFOFILE" ]; then
erjo@1087 215 patch 048 9a:00:00:00:90 $bs lcall displayinfo
erjo@1087 216 uudecode >$bs.infotext <<EOT
erjo@1087 217 begin-base64 644 -
erjo@1087 218 MdsGYI7D6AAAXoHGSgCJ8MHoCUii8QGwDbQOuwcAzRCsPAx1I79sBLFbJgIN
erjo@1087 219 uBsBJjoNdAnNFnT0mM0Wjsc8IHPjPBt0BuvPCMB1zWEHCx4oAss=
erjo@1087 220 ====
erjo@1087 221 EOT
erjo@1087 222 cat "$INFOFILE" >>$bs.infotext
erjo@1087 223 if [ $Version -lt 514 ]; then
erjo@1087 224 store 16 0x050 0x0022 $bs.infotext
erjo@1087 225 fi
erjo@1087 226 ddq if=/dev/zero bs=512 count=1 >>$bs.infotext
erjo@1087 227 n=$(($(stat -c %s $bs.infotext)/512))
erjo@1087 228 ddq if=$bs.infotext count=$n bs=512 >> $bs
erjo@1087 229 rm -f $bs.infotext
erjo@1087 230 store 8 0x1F1 $(($setupsz+$n)) $bs update setup size
erjo@1087 231 store 8 0x04A $((2+2*$setupsz)) $bs update displayinfo call
erjo@1087 232 fi
erjo@1087 233
erjo@1087 234 # Store cmdline after setup for kernels >= 0.99
erjo@1087 235 if [ -n "$CMDLINE" ]; then
erjo@1087 236 echo -n "$CMDLINE" | ddq bs=512 count=1 conv=sync >> $bs
erjo@1087 237 CmdlineOfs=0x9E00 # Should be in 0x8000 .. 0xA000
erjo@1087 238 ArgPtrOfs=0x228
erjo@1087 239 ArgPtrVal=$(( $SetupBase + $CmdlineOfs ))
erjo@1087 240 if [ $Version -lt 514 ]; then
erjo@1087 241 ArgPtrOfs=0x0020
erjo@1087 242 ArgPtrVal=$(( 0xA33F + ($CmdlineOfs << 16) ))
erjo@1087 243 fi
erjo@1087 244 store 32 $ArgPtrOfs $ArgPtrVal $bs "Cmdline '$CMDLINE'"
erjo@1087 245 fi
erjo@1087 246
erjo@1087 247 # Compute initramfs size (protocol >= 2.00)
erjo@1087 248 [ $Version -lt 512 ] && INITRD=""
erjo@1087 249 initrdlen=0
erjo@1087 250 INITRDPAD=4
erjo@1087 251 INITRDALIGN=0x1000
erjo@1087 252 for i in $( echo $INITRD | sed 's/,/ /' ); do
erjo@1087 253 [ -s "$i" ] || continue
erjo@1087 254 while [ -L "$i" ]; do i="$(readlink $i)"; done
erjo@1087 255 size=$(( ($(stat -c %s "$i") + $INITRDPAD - 1) & -$INITRDPAD ))
erjo@1087 256 [ -n "$DEBUG" ] && echo "initrd $i $size " 1>&2
erjo@1087 257 initrdlen=$(( $initrdlen + $size ))
erjo@1087 258 [ -n "$ADRSRD" ] || ADRSRD=$(( (($MEM * 0x100000) - $initrdlen) & -$INITRDALIGN ))
erjo@1087 259 store 32 $RamfsAdrOfs $(( $ADRSRD )) $bs initrd adrs
erjo@1087 260 store 32 $RamfsLenOfs $initrdlen $bs initrdlen
erjo@1087 261 done
erjo@1087 262
erjo@1087 263 [ -n "$NOSYSSIZEFIX" ] || store 32 0x1F4 \
erjo@1087 264 $(( ($(stat -c %s $KERNEL)+15)/16 - ($setupsz+1)*32)) $bs fix system size
erjo@1087 265
erjo@1087 266 # Output boot sector + setup + cmdline
erjo@1087 267 ddq if=$bs
erjo@1087 268
erjo@1087 269 # Output kernel code
erjo@1087 270 syssz=$(( ($(getlong 0x1F4 $bs)+31)/32 ))
erjo@1087 271 cat $KERNEL /dev/zero | ddq bs=512 skip=$(( $setupsz+1 )) count=$syssz conv=sync
erjo@1087 272
erjo@1087 273 # Output initramfs
erjo@1087 274 for i in $( echo $INITRD | sed 's/,/ /' ); do
erjo@1087 275 [ -s "$i" ] || continue
erjo@1087 276 ddq if=$i
erjo@1087 277 padding=$(( $INITRDPAD - ($(stat -c %s $i) % $INITRDPAD) ))
erjo@1087 278 [ $padding -eq $INITRDPAD ] || ddq if=/dev/zero bs=1 count=$padding
erjo@1087 279 done
erjo@1087 280
erjo@1087 281 # Cleanup
erjo@1087 282 rm -f $bs
erjo@1087 283 }
erjo@1087 284
erjo@1087 285 if [ "$FORMAT" == "0" ]; then # unsplitted
erjo@1087 286 floppyset > $PREFIX
erjo@1087 287 PAD=$(( 512 - ($(stat -c %s $PREFIX) % 512) ))
erjo@1087 288 [ $PAD -ne 512 ] && ddq if=/dev/zero bs=1 count=$PAD >> $PREFIX
erjo@1087 289 exit
erjo@1087 290 fi
erjo@1087 291 floppyset | split -b ${FORMAT}k /dev/stdin floppy$$
erjo@1087 292 i=1
erjo@1087 293 ls floppy$$* 2> /dev/null | while read file ; do
erjo@1087 294 output=$PREFIX$(printf "%03d" $i)
erjo@1087 295 cat $file /dev/zero | ddq bs=1k count=$FORMAT conv=sync of=$output
erjo@1087 296 echo $output
erjo@1087 297 rm -f $file
erjo@1087 298 i=$(( $i + 1 ))
erjo@1087 299 done