# # Kbuild for top-level directory of the kernel # This file takes care of the following: # 1) Generate asm-offsets.h # 2) Check for missing system calls ##### # 1) Generate asm-offsets.h # offsets-file := include/asm-$(ARCH)/asm-offsets.h always := $(offsets-file) targets := $(offsets-file) targets += arch/$(ARCH)/kernel/asm-offsets.s clean-files := $(addprefix $(objtree)/,$(targets)) # Default sed regexp - multiline due to syntax constraints define sed-y "/^->/{s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; s:->::; p;}" endef # Override default regexp for specific architectures sed-$(CONFIG_MIPS) := "/^@@@/{s/^@@@//; s/ \#.*\$$//; p;}" 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" ) > $@ endef # We use internal kbuild rules to avoid the "is up to date" message from make arch/$(ARCH)/kernel/asm-offsets.s: arch/$(ARCH)/kernel/asm-offsets.c FORCE $(Q)mkdir -p $(dir $@) $(call if_changed_dep,cc_s_c) $(obj)/$(offsets-file): arch/$(ARCH)/kernel/asm-offsets.s Kbuild $(Q)mkdir -p $(dir $@) $(call cmd,offsets) ##### # 2) 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)