4c078c86b4
The "-z notext" flag disables reporting an error if DT_TEXTREL is set.
ld.lld: error: can't create dynamic relocation R_PPC64_ADDR64 against
symbol: _start in readonly segment; recompile object files with
-fPIC or pass '-Wl,-z,notext' to allow text relocations in the
output
>>> defined in
>>> referenced by crt0.o:(.text+0x8) in archive arch/powerpc/boot/wrapper.a
The BFD linker disables this by default (though it's configurable in
current versions). LLD enables this by default. So we add the flag to
keep LLD from emitting the error.
Signed-off-by: Bill Wendling <morbo@google.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20201120224034.191382-2-morbo@google.com
585 lines
14 KiB
Bash
Executable File
585 lines
14 KiB
Bash
Executable File
#!/bin/sh
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# SPDX-License-Identifier: GPL-2.0-only
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# Copyright (C) 2006 Paul Mackerras, IBM Corporation <paulus@samba.org>
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# This script takes a kernel binary and optionally an initrd image
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# and/or a device-tree blob, and creates a bootable zImage for a
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# given platform.
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# Options:
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# -o zImage specify output file
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# -p platform specify platform (links in $platform.o)
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# -i initrd specify initrd file
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# -d devtree specify device-tree blob
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# -s tree.dts specify device-tree source file (needs dtc installed)
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# -e esm_blob specify ESM blob for secure images
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# -c cache $kernel.strip.gz (use if present & newer, else make)
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# -C prefix specify command prefix for cross-building tools
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# (strip, objcopy, ld)
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# -D dir specify directory containing data files used by script
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# (default ./arch/powerpc/boot)
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# -W dir specify working directory for temporary files (default .)
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# -z use gzip (legacy)
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# -Z zsuffix compression to use (gz, xz or none)
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# Stop execution if any command fails
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set -e
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# Allow for verbose output
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if [ "$V" = 1 ]; then
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set -x
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map="-Map wrapper.map"
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fi
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# defaults
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kernel=
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ofile=zImage
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platform=of
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initrd=
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dtb=
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dts=
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esm_blob=
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cacheit=
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binary=
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compression=.gz
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uboot_comp=gzip
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pie=
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format=
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notext=
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rodynamic=
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# cross-compilation prefix
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CROSS=
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# mkimage wrapper script
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MKIMAGE=$srctree/scripts/mkuboot.sh
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# directory for object and other files used by this script
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object=arch/powerpc/boot
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objbin=$object
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dtc=scripts/dtc/dtc
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# directory for working files
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tmpdir=.
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usage() {
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echo 'Usage: wrapper [-o output] [-p platform] [-i initrd]' >&2
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echo ' [-d devtree] [-s tree.dts] [-e esm_blob]' >&2
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echo ' [-c] [-C cross-prefix] [-D datadir] [-W workingdir]' >&2
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echo ' [-Z (gz|xz|none)] [--no-compression] [vmlinux]' >&2
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exit 1
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}
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run_cmd() {
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if [ "$V" = 1 ]; then
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$* 2>&1
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else
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local msg
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set +e
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msg=$($* 2>&1)
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if [ $? -ne "0" ]; then
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echo $msg
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exit 1
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fi
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set -e
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fi
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}
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while [ "$#" -gt 0 ]; do
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case "$1" in
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-o)
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shift
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[ "$#" -gt 0 ] || usage
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ofile="$1"
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;;
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-p)
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shift
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[ "$#" -gt 0 ] || usage
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platform="$1"
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;;
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-i)
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shift
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[ "$#" -gt 0 ] || usage
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initrd="$1"
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;;
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-d)
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shift
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[ "$#" -gt 0 ] || usage
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dtb="$1"
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;;
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-e)
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shift
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[ "$#" -gt 0 ] || usage
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esm_blob="$1"
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;;
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-s)
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shift
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[ "$#" -gt 0 ] || usage
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dts="$1"
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;;
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-c)
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cacheit=y
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;;
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-C)
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shift
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[ "$#" -gt 0 ] || usage
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CROSS="$1"
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;;
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-D)
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shift
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[ "$#" -gt 0 ] || usage
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object="$1"
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objbin="$1"
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;;
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-W)
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shift
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[ "$#" -gt 0 ] || usage
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tmpdir="$1"
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;;
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-z)
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compression=.gz
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uboot_comp=gzip
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;;
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-Z)
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shift
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[ "$#" -gt 0 ] || usage
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[ "$1" != "gz" -o "$1" != "xz" -o "$1" != "lzma" -o "$1" != "lzo" -o "$1" != "none" ] || usage
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compression=".$1"
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uboot_comp=$1
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if [ $compression = ".none" ]; then
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compression=
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uboot_comp=none
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fi
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if [ $uboot_comp = "gz" ]; then
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uboot_comp=gzip
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fi
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;;
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--no-gzip)
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# a "feature" of the the wrapper script is that it can be used outside
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# the kernel tree. So keeping this around for backwards compatibility.
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compression=
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uboot_comp=none
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;;
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-?)
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usage
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;;
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*)
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[ -z "$kernel" ] || usage
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kernel="$1"
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;;
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esac
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shift
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done
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if [ -n "$dts" ]; then
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if [ ! -r "$dts" -a -r "$object/dts/$dts" ]; then
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dts="$object/dts/$dts"
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fi
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if [ -z "$dtb" ]; then
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dtb="$platform.dtb"
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fi
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$dtc -O dtb -o "$dtb" -b 0 "$dts"
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fi
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if [ -z "$kernel" ]; then
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kernel=vmlinux
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fi
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LANG=C elfformat="`${CROSS}objdump -p "$kernel" | grep 'file format' | awk '{print $4}'`"
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case "$elfformat" in
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elf64-powerpcle) format=elf64lppc ;;
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elf64-powerpc) format=elf32ppc ;;
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elf32-powerpc) format=elf32ppc ;;
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esac
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ld_version()
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{
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# Poached from scripts/ld-version.sh, but we don't want to call that because
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# this script (wrapper) is distributed separately from the kernel source.
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# Extract linker version number from stdin and turn into single number.
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awk '{
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gsub(".*\\)", "");
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gsub(".*version ", "");
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gsub("-.*", "");
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split($1,a, ".");
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print a[1]*100000000 + a[2]*1000000 + a[3]*10000;
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exit
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}'
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}
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# Do not include PT_INTERP segment when linking pie. Non-pie linking
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# just ignores this option.
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LD_VERSION=$(${CROSS}ld --version | ld_version)
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LD_NO_DL_MIN_VERSION=$(echo 2.26 | ld_version)
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if [ "$LD_VERSION" -ge "$LD_NO_DL_MIN_VERSION" ] ; then
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nodl="--no-dynamic-linker"
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fi
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platformo=$object/"$platform".o
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lds=$object/zImage.lds
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ext=strip
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objflags=-S
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tmp=$tmpdir/zImage.$$.o
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ksection=.kernel:vmlinux.strip
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isection=.kernel:initrd
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esection=.kernel:esm_blob
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link_address='0x400000'
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make_space=y
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if [ -n "$esm_blob" -a "$platform" != "pseries" ]; then
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echo "ESM blob not support on non-pseries platforms" >&2
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exit 1
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fi
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case "$platform" in
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of)
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platformo="$object/of.o $object/epapr.o"
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make_space=n
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;;
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pseries)
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platformo="$object/pseries-head.o $object/of.o $object/epapr.o"
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link_address='0x4000000'
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if [ "$format" != "elf32ppc" ]; then
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link_address=
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pie=-pie
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fi
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make_space=n
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;;
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maple)
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platformo="$object/of.o $object/epapr.o"
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link_address='0x400000'
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make_space=n
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;;
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pmac|chrp)
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platformo="$object/of.o $object/epapr.o"
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make_space=n
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;;
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coff)
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platformo="$object/crt0.o $object/of.o $object/epapr.o"
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lds=$object/zImage.coff.lds
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link_address='0x500000'
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make_space=n
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pie=
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;;
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miboot|uboot*)
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# miboot and U-boot want just the bare bits, not an ELF binary
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ext=bin
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objflags="-O binary"
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tmp="$ofile"
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ksection=image
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isection=initrd
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;;
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cuboot*)
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binary=y
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compression=
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case "$platform" in
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*-mpc866ads|*-mpc885ads|*-adder875*|*-ep88xc)
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platformo=$object/cuboot-8xx.o
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;;
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*5200*|*-motionpro)
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platformo=$object/cuboot-52xx.o
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;;
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*-pq2fads|*-ep8248e|*-mpc8272*|*-storcenter)
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platformo=$object/cuboot-pq2.o
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;;
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*-mpc824*)
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platformo=$object/cuboot-824x.o
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;;
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*-mpc83*|*-asp834x*)
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platformo=$object/cuboot-83xx.o
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;;
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*-tqm8541|*-mpc8560*|*-tqm8560|*-tqm8555|*-ksi8560*)
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platformo=$object/cuboot-85xx-cpm2.o
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;;
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*-mpc85*|*-tqm85*|*-sbc85*)
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platformo=$object/cuboot-85xx.o
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;;
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*-amigaone)
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link_address='0x800000'
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;;
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esac
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;;
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ps3)
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platformo="$object/ps3-head.o $object/ps3-hvcall.o $object/ps3.o"
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lds=$object/zImage.ps3.lds
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compression=
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ext=bin
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objflags="-O binary --set-section-flags=.bss=contents,alloc,load,data"
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ksection=.kernel:vmlinux.bin
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isection=.kernel:initrd
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link_address=''
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make_space=n
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pie=
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;;
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ep88xc|ep405|ep8248e)
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platformo="$object/fixed-head.o $object/$platform.o"
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binary=y
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;;
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adder875-redboot)
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platformo="$object/fixed-head.o $object/redboot-8xx.o"
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binary=y
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;;
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simpleboot-*)
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platformo="$object/fixed-head.o $object/simpleboot.o"
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binary=y
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;;
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asp834x-redboot)
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platformo="$object/fixed-head.o $object/redboot-83xx.o"
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binary=y
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;;
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xpedite52*)
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link_address='0x1400000'
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platformo=$object/cuboot-85xx.o
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;;
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gamecube|wii)
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link_address='0x600000'
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platformo="$object/$platform-head.o $object/$platform.o"
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;;
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treeboot-currituck)
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link_address='0x1000000'
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;;
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treeboot-akebono)
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link_address='0x1000000'
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;;
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treeboot-iss4xx-mpic)
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platformo="$object/treeboot-iss4xx.o"
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;;
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epapr)
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platformo="$object/pseries-head.o $object/epapr.o $object/epapr-wrapper.o"
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link_address='0x20000000'
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pie=-pie
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notext='-z notext'
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rodynamic=$(if ${CROSS}ld -V 2>&1 | grep -q LLD ; then echo "-z rodynamic"; fi)
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;;
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mvme5100)
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platformo="$object/fixed-head.o $object/mvme5100.o"
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binary=y
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;;
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mvme7100)
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platformo="$object/motload-head.o $object/mvme7100.o"
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link_address='0x4000000'
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binary=y
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;;
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esac
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vmz="$tmpdir/`basename \"$kernel\"`.$ext"
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# Calculate the vmlinux.strip size
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${CROSS}objcopy $objflags "$kernel" "$vmz.$$"
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strip_size=$(${CONFIG_SHELL} "${srctree}/scripts/file-size.sh" "$vmz.$$")
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if [ -z "$cacheit" -o ! -f "$vmz$compression" -o "$vmz$compression" -ot "$kernel" ]; then
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# recompress the image if we need to
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case $compression in
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.xz)
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xz --check=crc32 -f -6 "$vmz.$$"
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;;
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.gz)
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gzip -n -f -9 "$vmz.$$"
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;;
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.lzma)
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xz --format=lzma -f -6 "$vmz.$$"
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;;
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.lzo)
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lzop -f -9 "$vmz.$$"
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;;
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*)
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# drop the compression suffix so the stripped vmlinux is used
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compression=
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uboot_comp=none
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;;
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esac
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if [ -n "$cacheit" ]; then
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mv -f "$vmz.$$$compression" "$vmz$compression"
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else
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vmz="$vmz.$$"
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fi
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else
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rm -f $vmz.$$
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fi
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vmz="$vmz$compression"
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if [ "$make_space" = "y" ]; then
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# Round the size to next higher MB limit
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round_size=$(((strip_size + 0xfffff) & 0xfff00000))
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round_size=0x$(printf "%x" $round_size)
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link_addr=$(printf "%d" $link_address)
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if [ $link_addr -lt $strip_size ]; then
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echo "INFO: Uncompressed kernel (size 0x$(printf "%x\n" $strip_size))" \
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"overlaps the address of the wrapper($link_address)"
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echo "INFO: Fixing the link_address of wrapper to ($round_size)"
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link_address=$round_size
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fi
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fi
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# Extract kernel version information, some platforms want to include
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# it in the image header
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version=`${CROSS}strings "$kernel" | grep '^Linux version [-0-9.]' | \
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cut -d' ' -f3`
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if [ -n "$version" ]; then
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uboot_version="-n Linux-$version"
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fi
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# physical offset of kernel image
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membase=`${CROSS}objdump -p "$kernel" | grep -m 1 LOAD | awk '{print $7}'`
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case "$platform" in
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uboot)
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rm -f "$ofile"
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${MKIMAGE} -A ppc -O linux -T kernel -C $uboot_comp -a $membase -e $membase \
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$uboot_version -d "$vmz" "$ofile"
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if [ -z "$cacheit" ]; then
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rm -f "$vmz"
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fi
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exit 0
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;;
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uboot-obs600)
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rm -f "$ofile"
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# obs600 wants a multi image with an initrd, so we need to put a fake
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# one in even when building a "normal" image.
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if [ -n "$initrd" ]; then
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real_rd="$initrd"
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else
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real_rd=`mktemp`
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echo "\0" >>"$real_rd"
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fi
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${MKIMAGE} -A ppc -O linux -T multi -C gzip -a $membase -e $membase \
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$uboot_version -d "$vmz":"$real_rd":"$dtb" "$ofile"
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if [ -z "$initrd" ]; then
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rm -f "$real_rd"
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fi
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if [ -z "$cacheit" ]; then
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rm -f "$vmz"
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fi
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exit 0
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;;
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esac
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addsec() {
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${CROSS}objcopy $4 $1 \
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--add-section=$3="$2" \
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--set-section-flags=$3=contents,alloc,load,readonly,data
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}
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addsec $tmp "$vmz" $ksection $object/empty.o
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if [ -z "$cacheit" ]; then
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rm -f "$vmz"
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fi
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if [ -n "$initrd" ]; then
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addsec $tmp "$initrd" $isection
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fi
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if [ -n "$dtb" ]; then
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addsec $tmp "$dtb" .kernel:dtb
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if [ -n "$dts" ]; then
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rm $dtb
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fi
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fi
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if [ -n "$esm_blob" ]; then
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addsec $tmp "$esm_blob" $esection
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fi
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if [ "$platform" != "miboot" ]; then
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if [ -n "$link_address" ] ; then
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text_start="-Ttext $link_address"
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fi
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#link everything
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${CROSS}ld -m $format -T $lds $text_start $pie $nodl $rodynamic $notext -o "$ofile" $map \
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$platformo $tmp $object/wrapper.a
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rm $tmp
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fi
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# Some platforms need the zImage's entry point and base address
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base=0x`${CROSS}nm "$ofile" | grep ' _start$' | cut -d' ' -f1`
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entry=`${CROSS}objdump -f "$ofile" | grep '^start address ' | cut -d' ' -f3`
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if [ -n "$binary" ]; then
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mv "$ofile" "$ofile".elf
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${CROSS}objcopy -O binary "$ofile".elf "$ofile"
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fi
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# post-processing needed for some platforms
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case "$platform" in
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pseries|chrp|maple)
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$objbin/addnote "$ofile"
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;;
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coff)
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${CROSS}objcopy -O aixcoff-rs6000 --set-start "$entry" "$ofile"
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$objbin/hack-coff "$ofile"
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;;
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cuboot*)
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gzip -n -f -9 "$ofile"
|
|
${MKIMAGE} -A ppc -O linux -T kernel -C gzip -a "$base" -e "$entry" \
|
|
$uboot_version -d "$ofile".gz "$ofile"
|
|
;;
|
|
treeboot*)
|
|
mv "$ofile" "$ofile.elf"
|
|
$objbin/mktree "$ofile.elf" "$ofile" "$base" "$entry"
|
|
if [ -z "$cacheit" ]; then
|
|
rm -f "$ofile.elf"
|
|
fi
|
|
exit 0
|
|
;;
|
|
ps3)
|
|
# The ps3's loader supports loading a gzipped binary image from flash
|
|
# rom to ram addr zero. The loader then enters the system reset
|
|
# vector at addr 0x100. A bootwrapper overlay is used to arrange for
|
|
# a binary image of the kernel to be at addr zero, and yet have a
|
|
# suitable bootwrapper entry at 0x100. To construct the final rom
|
|
# image 512 bytes from offset 0x100 is copied to the bootwrapper
|
|
# place holder at symbol __system_reset_kernel. The 512 bytes of the
|
|
# bootwrapper entry code at symbol __system_reset_overlay is then
|
|
# copied to offset 0x100. At runtime the bootwrapper program copies
|
|
# the data at __system_reset_kernel back to addr 0x100.
|
|
|
|
system_reset_overlay=0x`${CROSS}nm "$ofile" \
|
|
| grep ' __system_reset_overlay$' \
|
|
| cut -d' ' -f1`
|
|
system_reset_overlay=`printf "%d" $system_reset_overlay`
|
|
system_reset_kernel=0x`${CROSS}nm "$ofile" \
|
|
| grep ' __system_reset_kernel$' \
|
|
| cut -d' ' -f1`
|
|
system_reset_kernel=`printf "%d" $system_reset_kernel`
|
|
overlay_dest="256"
|
|
overlay_size="512"
|
|
|
|
${CROSS}objcopy -O binary "$ofile" "$ofile.bin"
|
|
|
|
run_cmd dd if="$ofile.bin" of="$ofile.bin" conv=notrunc \
|
|
skip=$overlay_dest seek=$system_reset_kernel \
|
|
count=$overlay_size bs=1
|
|
|
|
run_cmd dd if="$ofile.bin" of="$ofile.bin" conv=notrunc \
|
|
skip=$system_reset_overlay seek=$overlay_dest \
|
|
count=$overlay_size bs=1
|
|
|
|
odir="$(dirname "$ofile.bin")"
|
|
|
|
# The ps3's flash loader has a size limit of 16 MiB for the uncompressed
|
|
# image. If a compressed image that exceeded this limit is written to
|
|
# flash the loader will decompress that image until the 16 MiB limit is
|
|
# reached, then enter the system reset vector of the partially decompressed
|
|
# image. No warning is issued.
|
|
rm -f "$odir"/{otheros,otheros-too-big}.bld
|
|
size=$(${CROSS}nm --no-sort --radix=d "$ofile" | egrep ' _end$' | cut -d' ' -f1)
|
|
bld="otheros.bld"
|
|
if [ $size -gt $((0x1000000)) ]; then
|
|
bld="otheros-too-big.bld"
|
|
fi
|
|
gzip -n --force -9 --stdout "$ofile.bin" > "$odir/$bld"
|
|
;;
|
|
esac
|