1# 2# Kbuild for top-level directory of the kernel 3# This file takes care of the following: 4# 1) Generate asm-offsets.h 5# 2) Check for missing system calls 6 7##### 8# 1) Generate asm-offsets.h 9# 10 11offsets-file := include/asm-$(SRCARCH)/asm-offsets.h 12 13always := $(offsets-file) 14targets := $(offsets-file) 15targets += arch/$(SRCARCH)/kernel/asm-offsets.s 16clean-files := $(addprefix $(objtree)/,$(targets)) 17 18# Default sed regexp - multiline due to syntax constraints 19define sed-y 20 "/^->/{s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; s:->::; p;}" 21endef 22# Override default regexp for specific architectures 23sed-$(CONFIG_MIPS) := "/^@@@/{s/^@@@//; s/ \#.*\$$//; p;}" 24 25quiet_cmd_offsets = GEN $@ 26define cmd_offsets 27 (set -e; \ 28 echo "#ifndef __ASM_OFFSETS_H__"; \ 29 echo "#define __ASM_OFFSETS_H__"; \ 30 echo "/*"; \ 31 echo " * DO NOT MODIFY."; \ 32 echo " *"; \ 33 echo " * This file was generated by Kbuild"; \ 34 echo " *"; \ 35 echo " */"; \ 36 echo ""; \ 37 sed -ne $(sed-y) $<; \ 38 echo ""; \ 39 echo "#endif" ) > $@ 40endef 41 42# We use internal kbuild rules to avoid the "is up to date" message from make 43arch/$(SRCARCH)/kernel/asm-offsets.s: arch/$(SRCARCH)/kernel/asm-offsets.c FORCE 44 $(Q)mkdir -p $(dir $@) 45 $(call if_changed_dep,cc_s_c) 46 47$(obj)/$(offsets-file): arch/$(SRCARCH)/kernel/asm-offsets.s Kbuild 48 $(Q)mkdir -p $(dir $@) 49 $(call cmd,offsets) 50 51##### 52# 2) Check for missing system calls 53# 54 55quiet_cmd_syscalls = CALL $< 56 cmd_syscalls = $(CONFIG_SHELL) $< $(CC) $(c_flags) 57 58PHONY += missing-syscalls 59missing-syscalls: scripts/checksyscalls.sh FORCE 60 $(call cmd,syscalls) 61