1# SPDX-License-Identifier: GPL-2.0 2# 3# Kbuild for top-level directory of the kernel 4# This file takes care of the following: 5# 1) Generate bounds.h 6# 2) Generate timeconst.h 7# 3) Generate asm-offsets.h (may need bounds.h and timeconst.h) 8# 4) Check for missing system calls 9 10##### 11# 1) Generate bounds.h 12 13bounds-file := include/generated/bounds.h 14 15always := $(bounds-file) 16targets := kernel/bounds.s 17 18$(bounds-file): kernel/bounds.s FORCE 19 $(call filechk,offsets,__LINUX_BOUNDS_H__) 20 21##### 22# 2) Generate timeconst.h 23 24timeconst-file := include/generated/timeconst.h 25 26targets += $(timeconst-file) 27 28filechk_gentimeconst = echo $(CONFIG_HZ) | bc -q $< 29 30$(timeconst-file): kernel/time/timeconst.bc FORCE 31 $(call filechk,gentimeconst) 32 33##### 34# 3) Generate asm-offsets.h 35# 36 37offsets-file := include/generated/asm-offsets.h 38 39always += $(offsets-file) 40targets += arch/$(SRCARCH)/kernel/asm-offsets.s 41 42arch/$(SRCARCH)/kernel/asm-offsets.s: $(timeconst-file) $(bounds-file) 43 44$(offsets-file): arch/$(SRCARCH)/kernel/asm-offsets.s FORCE 45 $(call filechk,offsets,__ASM_OFFSETS_H__) 46 47##### 48# 4) Check for missing system calls 49# 50 51always += missing-syscalls 52targets += missing-syscalls 53 54quiet_cmd_syscalls = CALL $< 55 cmd_syscalls = $(CONFIG_SHELL) $< $(CC) $(c_flags) $(missing_syscalls_flags) 56 57missing-syscalls: scripts/checksyscalls.sh $(offsets-file) FORCE 58 $(call cmd,syscalls) 59 60# Keep these three files during make clean 61no-clean-files := $(bounds-file) $(offsets-file) $(timeconst-file) 62