arch/powerpc/boot/wrapper

   1 #!/bin/sh
   2 # SPDX-License-Identifier: GPL-2.0-only
   3
   4 # Copyright (C) 2006 Paul Mackerras, IBM Corporation <paulus@samba.org>
   5
   6 # This script takes a kernel binary and optionally an initrd image
   7 # and/or a device-tree blob, and creates a bootable zImage for a
   8 # given platform.
   9
  10 # Options:
  11 # -o zImage     specify output file
  12 # -p platform   specify platform (links in $platform.o)
  13 # -i initrd     specify initrd file
  14 # -d devtree    specify device-tree blob
  15 # -s tree.dts   specify device-tree source file (needs dtc installed)
  16 # -e esm_blob   specify ESM blob for secure images
  17 # -c            cache $kernel.strip.gz (use if present & newer, else make)
  18 # -C prefix     specify command prefix for cross-building tools
  19 #               (strip, objcopy, ld)
  20 # -D dir        specify directory containing data files used by script
  21 #               (default ./arch/powerpc/boot)
  22 # -W dir        specify working directory for temporary files (default .)
  23 # -z            use gzip (legacy)
  24 # -Z zsuffix    compression to use (gz, xz or none)
  25
  26 # Stop execution if any command fails
  27 set -e
  28
  29 export LC_ALL=C
  30
  31 # Allow for verbose output
  32 if [ "$V" = 1 ]; then
  33     set -x
  34     map="-Map wrapper.map"
  35 fi
  36
  37 # defaults
  38 kernel=
  39 ofile=zImage
  40 platform=of
  41 initrd=
  42 dtb=
  43 dts=
  44 esm_blob=
  45 cacheit=
  46 binary=
  47 compression=.gz
  48 uboot_comp=gzip
  49 pie=
  50 format=
  51 notext=
  52 rodynamic=
  53
  54 # cross-compilation prefix
  55 CROSS=
  56
  57 # mkimage wrapper script
  58 MKIMAGE=$srctree/scripts/mkuboot.sh
  59
  60 # directory for object and other files used by this script
  61 object=arch/powerpc/boot
  62 objbin=$object
  63 dtc=scripts/dtc/dtc
  64
  65 # directory for working files
  66 tmpdir=.
  67
  68 usage() {
  69     echo 'Usage: wrapper [-o output] [-p platform] [-i initrd]' >&2
  70     echo '       [-d devtree] [-s tree.dts] [-e esm_blob]' >&2
  71     echo '       [-c] [-C cross-prefix] [-D datadir] [-W workingdir]' >&2
  72     echo '       [-Z (gz|xz|none)] [--no-compression] [vmlinux]' >&2
  73     exit 1
  74 }
  75
  76 run_cmd() {
  77     if [ "$V" = 1 ]; then
  78         $* 2>&1
  79     else
  80         local msg
  81
  82         set +e
  83         msg=$($* 2>&1)
  84
  85         if [ $? -ne "0" ]; then
  86                 echo $msg
  87                 exit 1
  88         fi
  89         set -e
  90     fi
  91 }
  92
  93 while [ "$#" -gt 0 ]; do
  94     case "$1" in
  95     -o)
  96         shift
  97         [ "$#" -gt 0 ] || usage
  98         ofile="$1"
  99         ;;
 100     -p)
 101         shift
 102         [ "$#" -gt 0 ] || usage
 103         platform="$1"
 104         ;;
 105     -i)
 106         shift
 107         [ "$#" -gt 0 ] || usage
 108         initrd="$1"
 109         ;;
 110     -d)
 111         shift
 112         [ "$#" -gt 0 ] || usage
 113         dtb="$1"
 114         ;;
 115     -e)
 116         shift
 117         [ "$#" -gt 0 ] || usage
 118         esm_blob="$1"
 119         ;;
 120     -s)
 121         shift
 122         [ "$#" -gt 0 ] || usage
 123         dts="$1"
 124         ;;
 125     -c)
 126         cacheit=y
 127         ;;
 128     -C)
 129         shift
 130         [ "$#" -gt 0 ] || usage
 131         CROSS="$1"
 132         ;;
 133     -D)
 134         shift
 135         [ "$#" -gt 0 ] || usage
 136         object="$1"
 137         objbin="$1"
 138         ;;
 139     -W)
 140         shift
 141         [ "$#" -gt 0 ] || usage
 142         tmpdir="$1"
 143         ;;
 144     -z)
 145         compression=.gz
 146         uboot_comp=gzip
 147         ;;
 148     -Z)
 149         shift
 150         [ "$#" -gt 0 ] || usage
 151         [ "$1" != "gz" -o "$1" != "xz" -o "$1" != "lzma" -o "$1" != "lzo" -o "$1" != "none" ] || usage
 152
 153         compression=".$1"
 154         uboot_comp=$1
 155
 156         if [ $compression = ".none" ]; then
 157                 compression=
 158                 uboot_comp=none
 159         fi
 160         if [ $uboot_comp = "gz" ]; then
 161                 uboot_comp=gzip
 162         fi
 163         ;;
 164     --no-gzip)
 165         # a "feature" of the wrapper script is that it can be used outside
 166         # the kernel tree. So keeping this around for backwards compatibility.
 167         compression=
 168         uboot_comp=none
 169         ;;
 170     -?)
 171         usage
 172         ;;
 173     *)
 174         [ -z "$kernel" ] || usage
 175         kernel="$1"
 176         ;;
 177     esac
 178     shift
 179 done
 180
 181
 182 if [ -n "$dts" ]; then
 183     if [ ! -r "$dts" -a -r "$object/dts/$dts" ]; then
 184         dts="$object/dts/$dts"
 185     fi
 186     if [ -z "$dtb" ]; then
 187         dtb="$platform.dtb"
 188     fi
 189     $dtc -O dtb -o "$dtb" -b 0 "$dts"
 190 fi
 191
 192 if [ -z "$kernel" ]; then
 193     kernel=vmlinux
 194 fi
 195
 196 LC_ALL=C elfformat="`${CROSS}objdump -p "$kernel" | grep 'file format' | awk '{print $4}'`"
 197 case "$elfformat" in
 198     elf64-powerpcle)    format=elf64lppc        ;;
 199     elf64-powerpc)      format=elf32ppc ;;
 200     elf32-powerpc)      format=elf32ppc ;;
 201 esac
 202
 203 ld_version()
 204 {
 205     # Poached from scripts/ld-version.sh, but we don't want to call that because
 206     # this script (wrapper) is distributed separately from the kernel source.
 207     # Extract linker version number from stdin and turn into single number.
 208     awk '{
 209         gsub(".*\\)", "");
 210         gsub(".*version ", "");
 211         gsub("-.*", "");
 212         split($1,a, ".");
 213         if( length(a[3]) == "8" )
 214                 # a[3] is probably a date of format yyyymmdd used for release snapshots. We
 215                 # can assume it to be zero as it does not signify a new version as such.
 216                 a[3] = 0;
 217         print a[1]*100000000 + a[2]*1000000 + a[3]*10000;
 218         exit
 219     }'
 220 }
 221
 222 ld_is_lld()
 223 {
 224         ${CROSS}ld -V 2>&1 | grep -q LLD
 225 }
 226
 227 # Do not include PT_INTERP segment when linking pie. Non-pie linking
 228 # just ignores this option.
 229 LD_VERSION=$(${CROSS}ld --version | ld_version)
 230 LD_NO_DL_MIN_VERSION=$(echo 2.26 | ld_version)
 231 if [ "$LD_VERSION" -ge "$LD_NO_DL_MIN_VERSION" ] ; then
 232         nodl="--no-dynamic-linker"
 233 fi
 234
 235 # suppress some warnings in recent ld versions
 236 nowarn="-z noexecstack"
 237 if ! ld_is_lld; then
 238         if [ "$LD_VERSION" -ge "$(echo 2.39 | ld_version)" ]; then
 239                 nowarn="$nowarn --no-warn-rwx-segments"
 240         fi
 241 fi
 242
 243 platformo=$object/"$platform".o
 244 lds=$object/zImage.lds
 245 ext=strip
 246 objflags=-S
 247 tmp=$tmpdir/zImage.$$.o
 248 ksection=.kernel:vmlinux.strip
 249 isection=.kernel:initrd
 250 esection=.kernel:esm_blob
 251 link_address='0x400000'
 252 make_space=y
 253
 254
 255 if [ -n "$esm_blob" -a "$platform" != "pseries" ]; then
 256     echo "ESM blob not support on non-pseries platforms" >&2
 257     exit 1
 258 fi
 259
 260 case "$platform" in
 261 of)
 262     platformo="$object/of.o $object/epapr.o"
 263     make_space=n
 264     ;;
 265 pseries)
 266     platformo="$object/pseries-head.o $object/of.o $object/epapr.o"
 267     link_address='0x4000000'
 268     if [ "$format" != "elf32ppc" ]; then
 269         link_address=
 270         pie=-pie
 271     fi
 272     make_space=n
 273     ;;
 274 pmac|chrp)
 275     platformo="$object/of.o $object/epapr.o"
 276     make_space=n
 277     ;;
 278 coff)
 279     platformo="$object/crt0.o $object/of.o $object/epapr.o"
 280     lds=$object/zImage.coff.lds
 281     link_address='0x500000'
 282     make_space=n
 283     pie=
 284     ;;
 285 miboot|uboot*)
 286     # miboot and U-boot want just the bare bits, not an ELF binary
 287     ext=bin
 288     objflags="-O binary"
 289     tmp="$ofile"
 290     ksection=image
 291     isection=initrd
 292     ;;
 293 cuboot*)
 294     binary=y
 295     compression=
 296     case "$platform" in
 297     *-mpc866ads|*-mpc885ads|*-adder875*|*-ep88xc)
 298         platformo=$object/cuboot-8xx.o
 299         ;;
 300     *5200*|*-motionpro)
 301         platformo=$object/cuboot-52xx.o
 302         ;;
 303     *-pq2fads|*-ep8248e|*-mpc8272*|*-storcenter)
 304         platformo=$object/cuboot-pq2.o
 305         ;;
 306     *-mpc824*)
 307         platformo=$object/cuboot-824x.o
 308         ;;
 309     *-mpc83*|*-asp834x*)
 310         platformo=$object/cuboot-83xx.o
 311         ;;
 312     *-tqm8541|*-mpc8560*|*-tqm8560|*-tqm8555|*-ksi8560*)
 313         platformo=$object/cuboot-85xx-cpm2.o
 314         ;;
 315     *-mpc85*|*-tqm85*)
 316         platformo=$object/cuboot-85xx.o
 317         ;;
 318     *-amigaone)
 319         link_address='0x800000'
 320         ;;
 321     esac
 322     ;;
 323 ps3)
 324     platformo="$object/ps3-head.o $object/ps3-hvcall.o $object/ps3.o"
 325     lds=$object/zImage.ps3.lds
 326     compression=
 327     ext=bin
 328     objflags="-O binary --set-section-flags=.bss=contents,alloc,load,data"
 329     ksection=.kernel:vmlinux.bin
 330     isection=.kernel:initrd
 331     link_address=''
 332     make_space=n
 333     pie=
 334     ;;
 335 ep88xc|ep8248e)
 336     platformo="$object/fixed-head.o $object/$platform.o"
 337     binary=y
 338     ;;
 339 adder875-redboot)
 340     platformo="$object/fixed-head.o $object/redboot-8xx.o"
 341     binary=y
 342     ;;
 343 simpleboot-*)
 344     platformo="$object/fixed-head.o $object/simpleboot.o"
 345     binary=y
 346     ;;
 347 asp834x-redboot)
 348     platformo="$object/fixed-head.o $object/redboot-83xx.o"
 349     binary=y
 350     ;;
 351 xpedite52*)
 352     link_address='0x1400000'
 353     platformo=$object/cuboot-85xx.o
 354     ;;
 355 gamecube|wii)
 356     link_address='0x600000'
 357     platformo="$object/$platform-head.o $object/$platform.o"
 358     ;;
 359 microwatt)
 360     link_address='0x500000'
 361     platformo="$object/fixed-head.o $object/$platform.o"
 362     binary=y
 363     ;;
 364 treeboot-currituck)
 365     link_address='0x1000000'
 366     ;;
 367 treeboot-akebono)
 368     link_address='0x1000000'
 369     ;;
 370 treeboot-iss4xx-mpic)
 371     platformo="$object/treeboot-iss4xx.o"
 372     ;;
 373 epapr)
 374     platformo="$object/pseries-head.o $object/epapr.o $object/epapr-wrapper.o"
 375     link_address='0x20000000'
 376     pie=-pie
 377     notext='-z notext'
 378     rodynamic=$(if ${CROSS}ld -V 2>&1 | grep -q LLD ; then echo "-z rodynamic"; fi)
 379     ;;
 380 mvme5100)
 381     platformo="$object/fixed-head.o $object/mvme5100.o"
 382     binary=y
 383     ;;
 384 mvme7100)
 385     platformo="$object/motload-head.o $object/mvme7100.o"
 386     link_address='0x4000000'
 387     binary=y
 388     ;;
 389 esac
 390
 391 vmz="$tmpdir/`basename \"$kernel\"`.$ext"
 392
 393 # Calculate the vmlinux.strip size
 394 ${CROSS}objcopy $objflags "$kernel" "$vmz.$$"
 395 strip_size=$(${CONFIG_SHELL} "${srctree}/scripts/file-size.sh" "$vmz.$$")
 396
 397 if [ -z "$cacheit" -o ! -f "$vmz$compression" -o "$vmz$compression" -ot "$kernel" ]; then
 398     # recompress the image if we need to
 399     case $compression in
 400     .xz)
 401         xz --check=crc32 -f -6 "$vmz.$$"
 402         ;;
 403     .gz)
 404         gzip -n -f -9 "$vmz.$$"
 405         ;;
 406     .lzma)
 407         xz --format=lzma -f -6 "$vmz.$$"
 408         ;;
 409     .lzo)
 410         lzop -f -9 "$vmz.$$"
 411         ;;
 412     *)
 413         # drop the compression suffix so the stripped vmlinux is used
 414         compression=
 415         uboot_comp=none
 416         ;;
 417     esac
 418
 419     if [ -n "$cacheit" ]; then
 420         mv -f "$vmz.$$$compression" "$vmz$compression"
 421     else
 422         vmz="$vmz.$$"
 423     fi
 424 else
 425     rm -f $vmz.$$
 426 fi
 427
 428 vmz="$vmz$compression"
 429
 430 if [ "$make_space" = "y" ]; then
 431         # Round the size to next higher MB limit
 432         round_size=$(((strip_size + 0xfffff) & 0xfff00000))
 433
 434         round_size=0x$(printf "%x" $round_size)
 435         link_addr=$(printf "%d" $link_address)
 436
 437         if [ $link_addr -lt $strip_size ]; then
 438             echo "INFO: Uncompressed kernel (size 0x$(printf "%x\n" $strip_size))" \
 439                         "overlaps the address of the wrapper($link_address)"
 440             echo "INFO: Fixing the link_address of wrapper to ($round_size)"
 441             link_address=$round_size
 442         fi
 443 fi
 444
 445 # Extract kernel version information, some platforms want to include
 446 # it in the image header
 447 version=`${CROSS}strings "$kernel" | grep '^Linux version [-0-9.]' | \
 448     head -n1 | cut -d' ' -f3`
 449 if [ -n "$version" ]; then
 450     uboot_version="-n Linux-$version"
 451 fi
 452
 453 # physical offset of kernel image
 454 membase=`${CROSS}objdump -p "$kernel" | grep -m 1 LOAD | awk '{print $7}'`
 455
 456 case "$platform" in
 457 uboot)
 458     rm -f "$ofile"
 459     ${MKIMAGE} -A ppc -O linux -T kernel -C $uboot_comp -a $membase -e $membase \
 460         $uboot_version -d "$vmz" "$ofile"
 461     if [ -z "$cacheit" ]; then
 462         rm -f "$vmz"
 463     fi
 464     exit 0
 465     ;;
 466 esac
 467
 468 addsec() {
 469     ${CROSS}objcopy $4 $1 \
 470         --add-section=$3="$2" \
 471         --set-section-flags=$3=contents,alloc,load,readonly,data
 472 }
 473
 474 addsec $tmp "$vmz" $ksection $object/empty.o
 475 if [ -z "$cacheit" ]; then
 476     rm -f "$vmz"
 477 fi
 478
 479 if [ -n "$initrd" ]; then
 480     addsec $tmp "$initrd" $isection
 481 fi
 482
 483 if [ -n "$dtb" ]; then
 484     addsec $tmp "$dtb" .kernel:dtb
 485     if [ -n "$dts" ]; then
 486         rm $dtb
 487     fi
 488 fi
 489
 490 if [ -n "$esm_blob" ]; then
 491     addsec $tmp "$esm_blob" $esection
 492 fi
 493
 494 if [ "$platform" != "miboot" ]; then
 495     if [ -n "$link_address" ] ; then
 496         text_start="-Ttext $link_address"
 497     fi
 498 #link everything
 499     ${CROSS}ld -m $format -T $lds $text_start $pie $nodl $nowarn $rodynamic $notext -o "$ofile" $map \
 500         $platformo $tmp $object/wrapper.a
 501     rm $tmp
 502 fi
 503
 504 # Some platforms need the zImage's entry point and base address
 505 base=0x`${CROSS}nm "$ofile" | grep ' _start$' | cut -d' ' -f1`
 506 entry=`${CROSS}objdump -f "$ofile" | grep '^start address ' | cut -d' ' -f3`
 507
 508 if [ -n "$binary" ]; then
 509     mv "$ofile" "$ofile".elf
 510     ${CROSS}objcopy -O binary "$ofile".elf "$ofile"
 511 fi
 512
 513 # post-processing needed for some platforms
 514 case "$platform" in
 515 pseries|chrp)
 516     $objbin/addnote "$ofile"
 517     ;;
 518 coff)
 519     ${CROSS}objcopy -O aixcoff-rs6000 --set-start "$entry" "$ofile"
 520     $objbin/hack-coff "$ofile"
 521     ;;
 522 cuboot*)
 523     gzip -n -f -9 "$ofile"
 524     ${MKIMAGE} -A ppc -O linux -T kernel -C gzip -a "$base" -e "$entry" \
 525             $uboot_version -d "$ofile".gz "$ofile"
 526     ;;
 527 treeboot*)
 528     mv "$ofile" "$ofile.elf"
 529     $objbin/mktree "$ofile.elf" "$ofile" "$base" "$entry"
 530     if [ -z "$cacheit" ]; then
 531         rm -f "$ofile.elf"
 532     fi
 533     exit 0
 534     ;;
 535 ps3)
 536     # The ps3's loader supports loading a gzipped binary image from flash
 537     # rom to ram addr zero. The loader then enters the system reset
 538     # vector at addr 0x100.  A bootwrapper overlay is used to arrange for
 539     # a binary image of the kernel to be at addr zero, and yet have a
 540     # suitable bootwrapper entry at 0x100.  To construct the final rom
 541     # image 512 bytes from offset 0x100 is copied to the bootwrapper
 542     # place holder at symbol __system_reset_kernel.  The 512 bytes of the
 543     # bootwrapper entry code at symbol __system_reset_overlay is then
 544     # copied to offset 0x100.  At runtime the bootwrapper program copies
 545     # the data at __system_reset_kernel back to addr 0x100.
 546
 547     system_reset_overlay=0x`${CROSS}nm "$ofile" \
 548         | grep ' __system_reset_overlay$'       \
 549         | cut -d' ' -f1`
 550     system_reset_overlay=`printf "%d" $system_reset_overlay`
 551     system_reset_kernel=0x`${CROSS}nm "$ofile" \
 552         | grep ' __system_reset_kernel$'       \
 553         | cut -d' ' -f1`
 554     system_reset_kernel=`printf "%d" $system_reset_kernel`
 555     overlay_dest="256"
 556     overlay_size="512"
 557
 558     ${CROSS}objcopy -O binary "$ofile" "$ofile.bin"
 559
 560     run_cmd dd if="$ofile.bin" of="$ofile.bin" conv=notrunc   \
 561         skip=$overlay_dest seek=$system_reset_kernel          \
 562         count=$overlay_size bs=1
 563
 564     run_cmd dd if="$ofile.bin" of="$ofile.bin" conv=notrunc   \
 565         skip=$system_reset_overlay seek=$overlay_dest         \
 566         count=$overlay_size bs=1
 567
 568     odir="$(dirname "$ofile.bin")"
 569
 570     # The ps3's flash loader has a size limit of 16 MiB for the uncompressed
 571     # image.  If a compressed image that exceeded this limit is written to
 572     # flash the loader will decompress that image until the 16 MiB limit is
 573     # reached, then enter the system reset vector of the partially decompressed
 574     # image.  No warning is issued.
 575     rm -f "$odir"/{otheros,otheros-too-big}.bld
 576     size=$(${CROSS}nm --no-sort --radix=d "$ofile" | grep -E ' _end$' | cut -d' ' -f1)
 577     bld="otheros.bld"
 578     if [ $size -gt $((0x1000000)) ]; then
 579         bld="otheros-too-big.bld"
 580     fi
 581     gzip -n --force -9 --stdout "$ofile.bin" > "$odir/$bld"
 582     ;;
 583 esac