# # Kbuild for top-level directory of the kernel # This file takes care of the following: # 1) Generate bounds.h # 2) Generate asm-offsets.h (may need bounds.h) # 3) Check for missing system calls ##### # 1) Generate bounds.h bounds-file := include/linux/bounds.h always := $(bounds-file) targets := $(bounds-file) kernel/bounds.s quiet_cmd_bounds = GEN $@ define cmd_bounds (set -e; \ echo "#ifndef __LINUX_BOUNDS_H__"; \ echo "#define __LINUX_BOUNDS_H__"; \ echo "/*"; \ echo " * DO NOT MODIFY."; \ echo " *"; \ echo " * This file was generated by Kbuild"; \ echo " *"; \ echo " */"; \ echo ""; \ sed -ne $(sed-y) $<; \ echo ""; \ echo "#endif" ) > $@ endef # We use internal kbuild rules to avoid the "is up to date" message from make kernel/bounds.s: kernel/bounds.c FORCE $(Q)mkdir -p $(dir $@) $(call if_changed_dep,cc_s_c) $(obj)/$(bounds-file): kernel/bounds.s Kbuild $(Q)mkdir -p $(dir $@) $(call cmd,bounds) ##### # 2) Generate asm-offsets.h # offsets-file := include/asm/asm-offsets.h always += $(offsets-file) targets += $(offsets-file) targets += arch/$(SRCARCH)/kernel/asm-offsets.s # Default sed regexp - multiline due to syntax constraints define sed-y "/^->/{s:->#\(.*\):/* \1 */:; \ s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; \ s:->::; p;}" endef quiet_cmd_offsets = GEN $@ define cmd_offsets (set -e; \ echo "#ifndef __ASM_OFFSETS_H__"; \ echo "#define __ASM_OFFSETS_H__"; \ echo "/*"; \ echo " * DO NOT MODIFY."; \ echo " *"; \ echo " * This file was generated by Kbuild"; \ echo " *"; \ echo " */"; \ echo ""; \ sed -ne $(sed-y) $<; \ echo ""; \ echo "#endif" ) > $@ endef # We use internal kbuild rules to avoid the "is up to date" message from make arch/$(SRCARCH)/kernel/asm-offsets.s: arch/$(SRCARCH)/kernel/asm-offsets.c \ $(obj)/$(bounds-file) FORCE $(Q)mkdir -p $(dir $@) $(call if_changed_dep,cc_s_c) $(obj)/$(offsets-file): arch/$(SRCARCH)/kernel/asm-offsets.s Kbuild $(call cmd,offsets) ##### # 3) Check for missing system calls # quiet_cmd_syscalls = CALL $< cmd_syscalls = $(CONFIG_SHELL) $< $(CC) $(c_flags) PHONY += missing-syscalls missing-syscalls: scripts/checksyscalls.sh FORCE $(call cmd,syscalls) # Delete all targets during make clean clean-files := $(addprefix $(objtree)/,$(filter-out $(bounds-file) $(offsets-file),$(targets)))