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Makefile
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Makefile
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KERNEL_VERSION = linux-6.6.63
KERNEL_REMOTE = https://cdn.kernel.org/pub/linux/kernel/v6.x/$(KERNEL_VERSION).tar.xz
KERNEL_TARBALL = tarballs/$(KERNEL_VERSION).tar.xz
KERNEL_SOURCES = $(KERNEL_VERSION)
KERNEL_PATCHES = $(shell find patches/ -name "0*.patch" | sort)
KERNEL_C_BUNDLE = kernel.c
ABI_VERSION = 4
FULL_VERSION = 4.6.0
TIMESTAMP = "Mon Dec 2 11:39:28 CET 2024"
KERNEL_FLAGS = KBUILD_BUILD_TIMESTAMP=$(TIMESTAMP)
KERNEL_FLAGS += KBUILD_BUILD_USER=root
KERNEL_FLAGS += KBUILD_BUILD_HOST=libkrunfw
ifeq ($(SEV),1)
VARIANT = -sev
KERNEL_PATCHES += $(shell find patches-sev/ -name "0*.patch" | sort)
endif
HOSTARCH = $(shell uname -m)
OS = $(shell uname -s)
ifeq ($(ARCH),)
GUESTARCH := $(HOSTARCH)
STRIP := strip
else ifeq ($(ARCH),arm64)
GUESTARCH := aarch64
CC := $(CROSS_COMPILE)gcc
STRIP := $(CROSS_COMPILE)strip
else
GUESTARCH := $(ARCH)
CC := $(CROSS_COMPILE)gcc
STRIP := $(CROSS_COMPILE)strip
endif
KBUNDLE_TYPE_x86_64 = vmlinux
KBUNDLE_TYPE_aarch64 = Image
KERNEL_BINARY_x86_64 = $(KERNEL_SOURCES)/vmlinux
KERNEL_BINARY_aarch64 = $(KERNEL_SOURCES)/arch/arm64/boot/Image
KRUNFW_BINARY_Linux = libkrunfw$(VARIANT).so.$(FULL_VERSION)
KRUNFW_SONAME_Linux = libkrunfw$(VARIANT).so.$(ABI_VERSION)
KRUNFW_BASE_Linux = libkrunfw$(VARIANT).so
SONAME_Linux = -Wl,-soname,$(KRUNFW_SONAME_Linux)
KRUNFW_BINARY_Darwin = libkrunfw.$(ABI_VERSION).dylib
KRUNFW_SONAME_Darwin = libkrunfw.$(ABI_VERSION).dylib
KRUNFW_BASE_Darwin = libkrunfw.dylib
SONAME_Darwin =
LIBDIR_Linux = lib64
LIBDIR_Darwin = lib
ifeq ($(PREFIX),)
PREFIX := /usr/local
endif
ifeq ($(SEV),1)
QBOOT_BINARY = qboot/bios.bin
QBOOT_C_BUNDLE = qboot.c
INITRD_BINARY = initrd/initrd.gz
INITRD_C_BUNDLE = initrd.c
endif
.PHONY: all install clean
all: $(KRUNFW_BINARY_$(OS))
$(KERNEL_TARBALL):
@mkdir -p tarballs
curl $(KERNEL_REMOTE) -o $(KERNEL_TARBALL)
$(KERNEL_SOURCES): $(KERNEL_TARBALL)
tar xf $(KERNEL_TARBALL)
for patch in $(KERNEL_PATCHES); do patch -p1 -d $(KERNEL_SOURCES) < "$$patch"; done
cp config-libkrunfw$(VARIANT)_$(GUESTARCH) $(KERNEL_SOURCES)/.config
cd $(KERNEL_SOURCES) ; $(MAKE) olddefconfig
$(KERNEL_BINARY_$(GUESTARCH)): $(KERNEL_SOURCES)
cd $(KERNEL_SOURCES) ; rm -f .version ; $(MAKE) $(MAKEFLAGS) $(KERNEL_FLAGS)
ifeq ($(OS),Darwin)
$(KERNEL_C_BUNDLE):
@echo "Building on macOS, using ./build_on_krunvm.sh"
./build_on_krunvm.sh
else
$(KERNEL_C_BUNDLE): $(KERNEL_BINARY_$(GUESTARCH))
@echo "Generating $(KERNEL_C_BUNDLE) from $(KERNEL_BINARY_$(GUESTARCH))..."
@python3 bin2cbundle.py -t $(KBUNDLE_TYPE_$(GUESTARCH)) $(KERNEL_BINARY_$(GUESTARCH)) kernel.c
endif
ifeq ($(SEV),1)
$(QBOOT_C_BUNDLE): $(QBOOT_BINARY)
@echo "Generating $(QBOOT_C_BUNDLE) from $(QBOOT_BINARY)..."
@python3 bin2cbundle.py -t qboot $(QBOOT_BINARY) qboot.c
$(INITRD_C_BUNDLE): $(INITRD_BINARY)
@echo "Generating $(INITRD_C_BUNDLE) from $(INITRD_BINARY)..."
@python3 bin2cbundle.py -t initrd $(INITRD_BINARY) initrd.c
endif
$(KRUNFW_BINARY_$(OS)): $(KERNEL_C_BUNDLE) $(QBOOT_C_BUNDLE) $(INITRD_C_BUNDLE)
$(CC) -fPIC -DABI_VERSION=$(ABI_VERSION) -shared $(SONAME_$(OS)) -o $@ $(KERNEL_C_BUNDLE) $(QBOOT_C_BUNDLE) $(INITRD_C_BUNDLE)
ifeq ($(OS),Linux)
$(STRIP) $(KRUNFW_BINARY_$(OS))
endif
install:
install -d $(DESTDIR)$(PREFIX)/$(LIBDIR_$(OS))/
install -m 755 $(KRUNFW_BINARY_$(OS)) $(DESTDIR)$(PREFIX)/$(LIBDIR_$(OS))/
ifeq ($(OS),Darwin)
cd $(DESTDIR)$(PREFIX)/$(LIBDIR_$(OS))/ ; ln -sf $(KRUNFW_BINARY_$(OS)) $(KRUNFW_BASE_$(OS))
else
cd $(DESTDIR)$(PREFIX)/$(LIBDIR_$(OS))/ ; ln -sf $(KRUNFW_BINARY_$(OS)) $(KRUNFW_SONAME_$(OS)) ; ln -sf $(KRUNFW_SONAME_$(OS)) $(KRUNFW_BASE_$(OS))
endif
clean:
rm -fr $(KERNEL_SOURCES) $(KERNEL_C_BUNDLE) $(QBOOT_C_BUNDLE) $(INITRD_C_BUNDLE) $(KRUNFW_BINARY_$(OS))