poky/meta/classes-recipe/kernel-uboot.bbclass
Khem Raj 43a4d45f51 kernel: Add kernel specific OBJDUMP
This helps in switching toolchains cleanly for kernel build
between gcc and clang

Currently, some kernels allow building with clang but not all
the distro might use clang as default system compiler but kernel
may demand gcc which is provided via KERNEL_* variables, however
kernel does use OBJCOPY at places during build and it maybe set
to use llvm objcopy when using clang. That should be a deliberate
setting when clang is used for kernel as well, otherwise it should
use binutils provided objcopy

(From OE-Core rev: 17b409f2fd97894e0943d13c2cb0d52abde647e3)

Signed-off-by: Khem Raj <raj.khem@gmail.com>
Cc: Bruce Ashfield <bruce.ashfield@gmail.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
2023-03-01 21:29:31 +00:00

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#
# Copyright OpenEmbedded Contributors
#
# SPDX-License-Identifier: MIT
#
# fitImage kernel compression algorithm
FIT_KERNEL_COMP_ALG ?= "gzip"
FIT_KERNEL_COMP_ALG_EXTENSION ?= ".gz"
# Kernel image type passed to mkimage (i.e. kernel kernel_noload...)
UBOOT_MKIMAGE_KERNEL_TYPE ?= "kernel"
uboot_prep_kimage() {
if [ -e arch/${ARCH}/boot/compressed/vmlinux ]; then
vmlinux_path="arch/${ARCH}/boot/compressed/vmlinux"
linux_suffix=""
linux_comp="none"
elif [ -e arch/${ARCH}/boot/vmlinuz.bin ]; then
rm -f linux.bin
cp -l arch/${ARCH}/boot/vmlinuz.bin linux.bin
vmlinux_path=""
linux_suffix=""
linux_comp="none"
else
vmlinux_path="vmlinux"
# Use vmlinux.initramfs for linux.bin when INITRAMFS_IMAGE_BUNDLE set
# As per the implementation in kernel.bbclass.
# See do_bundle_initramfs function
if [ "${INITRAMFS_IMAGE_BUNDLE}" = "1" ] && [ -e vmlinux.initramfs ]; then
vmlinux_path="vmlinux.initramfs"
fi
linux_suffix="${FIT_KERNEL_COMP_ALG_EXTENSION}"
linux_comp="${FIT_KERNEL_COMP_ALG}"
fi
[ -n "${vmlinux_path}" ] && ${KERNEL_OBJCOPY} -O binary -R .note -R .comment -S "${vmlinux_path}" linux.bin
if [ "${linux_comp}" != "none" ] ; then
if [ "${linux_comp}" = "gzip" ] ; then
gzip -9 linux.bin
elif [ "${linux_comp}" = "lzo" ] ; then
lzop -9 linux.bin
fi
mv -f "linux.bin${linux_suffix}" linux.bin
fi
echo "${linux_comp}"
}