| # SPDX-License-Identifier: GPL-2.0 |
| # |
| # Kbuild for top-level directory of the kernel |
| |
| # Prepare global headers and check sanity before descending into sub-directories |
| # --------------------------------------------------------------------------- |
| |
| # Generate bounds.h |
| |
| bounds-file := include/generated/bounds.h |
| |
| targets := kernel/bounds.s |
| |
| $(bounds-file): kernel/bounds.s FORCE |
| $(call filechk,offsets,__LINUX_BOUNDS_H__) |
| |
| # Generate timeconst.h |
| |
| timeconst-file := include/generated/timeconst.h |
| |
| filechk_gentimeconst = echo $(CONFIG_HZ) | bc -q $< |
| |
| $(timeconst-file): kernel/time/timeconst.bc FORCE |
| $(call filechk,gentimeconst) |
| |
| # Generate asm-offsets.h |
| |
| offsets-file := include/generated/asm-offsets.h |
| |
| targets += arch/$(SRCARCH)/kernel/asm-offsets.s |
| |
| arch/$(SRCARCH)/kernel/asm-offsets.s: $(timeconst-file) $(bounds-file) |
| |
| $(offsets-file): arch/$(SRCARCH)/kernel/asm-offsets.s FORCE |
| $(call filechk,offsets,__ASM_OFFSETS_H__) |
| |
| # Check for missing system calls |
| |
| quiet_cmd_syscalls = CALL $< |
| cmd_syscalls = $(CONFIG_SHELL) $< $(CC) $(c_flags) $(missing_syscalls_flags) |
| |
| PHONY += missing-syscalls |
| missing-syscalls: scripts/checksyscalls.sh $(offsets-file) |
| $(call cmd,syscalls) |
| |
| # Check the manual modification of atomic headers |
| |
| quiet_cmd_check_sha1 = CHKSHA1 $< |
| cmd_check_sha1 = \ |
| if ! command -v sha1sum >/dev/null; then \ |
| echo "warning: cannot check the header due to sha1sum missing"; \ |
| exit 0; \ |
| fi; \ |
| if [ "$$(sed -n '$$s:// ::p' $<)" != \ |
| "$$(sed '$$d' $< | sha1sum | sed 's/ .*//')" ]; then \ |
| echo "error: $< has been modified." >&2; \ |
| exit 1; \ |
| fi; \ |
| touch $@ |
| |
| atomic-checks += $(addprefix $(obj)/.checked-, \ |
| atomic-arch-fallback.h \ |
| atomic-instrumented.h \ |
| atomic-long.h) |
| |
| targets += $(atomic-checks) |
| $(atomic-checks): $(obj)/.checked-%: include/linux/atomic/% FORCE |
| $(call if_changed,check_sha1) |
| |
| # A phony target that depends on all the preparation targets |
| |
| PHONY += prepare |
| prepare: $(offsets-file) missing-syscalls $(atomic-checks) |
| @: |
| |
| # Ordinary directory descending |
| # --------------------------------------------------------------------------- |
| |
| obj-y += init/ |
| obj-y += usr/ |
| obj-y += arch/$(SRCARCH)/ |
| obj-y += $(ARCH_CORE) |
| obj-y += kernel/ |
| obj-y += certs/ |
| obj-y += mm/ |
| obj-y += fs/ |
| obj-y += ipc/ |
| obj-y += security/ |
| obj-y += crypto/ |
| obj-$(CONFIG_BLOCK) += block/ |
| obj-$(CONFIG_IO_URING) += io_uring/ |
| obj-$(CONFIG_RUST) += rust/ |
| obj-y += $(ARCH_LIB) |
| obj-y += drivers/ |
| obj-y += sound/ |
| obj-$(CONFIG_SAMPLES) += samples/ |
| obj-$(CONFIG_NET) += net/ |
| obj-y += virt/ |
| obj-y += $(ARCH_DRIVERS) |
