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|
DO != echo -n > deps.mk
# this could be done better
DEBUGFLAGS != [ $(RELEASE) ] \
&& echo "-flto -O2 -DNDEBUG" \
|| echo "-O0 -DDEBUG"
UBOOTFLAGS != [ $(GENERIC_UBOOT) ] \
&& echo "-DGENERIC_UBOOT=1"
CFLAGS = -ffreestanding -nostdlib -static -fno-pie -std=c17 \
-Wall -Wextra -Wvla -D$(ARCH) -g
DEPFLAGS = -MT $@ -MMD -MP -MF $@.d
LINTFLAGS = -fsyntax-only
PREPROCESS = -E
LDFLAGS != [ $(LLVM) ] \
|| echo -static-libgcc -lgcc
BUILD = build
ARCH_KERN_BUILD = $(BUILD)/kernel/arch/$(ARCH)
ARCH_INIT_BUILD = $(BUILD)/init/arch/$(ARCH)
ARCH_SOURCE = arch/$(ARCH)
all: kmi.bin
# bmake requires us to run make depend to genereate deps.mk beforehand,
# so create an empty rule that lets the rest of the script do its job
depend:
# default values, overwrite if/when needed
ARCH ?= riscv64
CROSS_COMPILE ?= $(ARCH)-unknown-elf-
OBJCOPY != [ $(LLVM) ] \
&& echo llvm-objcopy \
|| echo $(CROSS_COMPILE)objcopy
COMPILER != [ $(LLVM) ] \
&& echo clang --target="$(CROSS_COMPILE)" \
|| echo $(CROSS_COMPILE)gcc
KERNEL_SOURCES != echo common/*.c common/uapi/*.c lib/*.c
# might consider renaming common, currently it refers to stuff common
# to all arches but clearly there are bits that are common to init and kernel
INIT_SOURCES != echo lib/fdt*.c common/fdt.c common/string.c
CLEANUP := build deps.mk kernel.* init.* kmi.bin
CLEANUP_CMD :=
include arch/$(ARCH)/source.mk
COMPILE_FLAGS := $(CFLAGS) $(ARCH_CFLAGS) $(UBOOTFLAGS)
LINK_FLAGS := $(LDFLAGS) $(ARCH_LDFLAGS)
INCLUDE_FLAGS := -I include -include config.h -include arch/$(ARCH)/config.h
# This makes sure .bss is loaded into the binary
OBJCOPY_FLAGS ?= -Obinary -R .garbage \
--set-section-flags .bss=alloc,load,contents
COMPILE = $(COMPILER) $(DEBUGFLAGS)\
$(COMPILE_FLAGS) $(DEPFLAGS) $(INCLUDE_FLAGS)
LINT = $(COMPILER) $(DEBUGFLAGS)\
$(COMPILE_FLAGS) $(LINTFLAGS) $(INCLUDE_FLAGS)
GENELF = $(COMPILER) $(DEBUGFLAGS)\
$(COMPILE_FLAGS) $(INCLUDE_FLAGS)
GENLINK = $(COMPILER) $(COMPILE_FLAGS) $(PREPROCESS) $(DEPFLAGS) $(INCLUDE_FLAGS)
STRIPLINK = sed -n '/^[^\#]/p'
KERN_SIZE = wc -c kernel.bin | awk '{print $$1}'
KERN_INFO = sed "s/<KERNEL_SIZE>/$$($(KERN_SIZE))/"
KERNEL_LINK := arch/$(ARCH)/conf/kernel-link
INIT_LINK := arch/$(ARCH)/conf/init-link
KERN_FLAGS != [ $(UBSAN) ] && echo -fsanitize=undefined || echo
INIT_FLAGS := -fpic
KERNEL_OBJECTS != ./scripts/gen-deps --kernel --compile "$(KERNEL_SOURCES)"
INIT_OBJECTS != ./scripts/gen-deps --init --compile "$(INIT_SOURCES)"
KERNEL_LD != ./scripts/gen-deps --kernel --link "$(KERNEL_LINK).S"
INIT_LD != ./scripts/gen-deps --init --link "$(INIT_LINK).S"
-include deps.mk
$(INIT_LD): kernel.bin
init.elf: $(INIT_OBJECTS) $(INIT_LD)
$(GENELF) $(INIT_FLAGS) -T $(INIT_LD) $(INIT_OBJECTS) -o init.elf $(LINK_FLAGS)
kernel.elf: $(KERNEL_OBJECTS) $(KERNEL_LD)
$(GENELF) $(KERNEL_FLAGS) -T $(KERNEL_LD) $(KERNEL_OBJECTS) -o kernel.elf $(LINK_FLAGS)
init.bin: init.elf
$(OBJCOPY) $(OBJCOPY_FLAGS) init.elf init.bin
kernel.bin: kernel.elf
$(OBJCOPY) $(OBJCOPY_FLAGS) kernel.elf kernel.bin
kmi.bin: init.bin kernel.bin
cat init.bin kernel.bin > kmi.bin
.PHONY:
lint: $(INIT_OBJECTS:.o=.o.l) $(KERNEL_OBJECTS:.o=.o.l)
.PHONY: format
format:
find arch lib common include -iname '*.[ch]' |\
xargs -n 10 -P 0 uncrustify -c uncrustify.conf --no-backup -F -
.PHONY: license
license:
find arch lib common include -iname '*.[ch]' |\
xargs -n 10 -P 0 ./scripts/license
.PHONY: docs
docs:
find arch lib common include -iname '*.[ch]' -not -path */gen/* |\
xargs ./scripts/warn-undocumented
doxygen docs/doxygen.conf
# bmake didn't seem to have the -f flag on by default
RM ?= rm -f
.PHONY: clean
clean:
$(RM) -r $(CLEANUP)
.PHONY: clean_run
clean_run:
$(CLEANUP_CMD)
.PHONY: clean_docs
clean_docs:
$(RM) -r docs/output
.PHONY: clean_all
clean_all: clean clean_run clean_docs
|
