1# 2# Kbuild for top-level directory of the kernel 3# This file takes care of the following: 4# 1) Generate bounds.h 5# 2) Generate asm-offsets.h (may need bounds.h) 6# 3) Check for missing system calls 7 8# Default sed regexp - multiline due to syntax constraints 9define sed-y 10 "/^->/{s:->#\(.*\):/* \1 */:; \ 11 s:^->\([^ ]*\) [\$$#]*\([-0-9]*\) \(.*\):#define \1 \2 /* \3 */:; \ 12 s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; \ 13 s:->::; p;}" 14endef 15 16quiet_cmd_offsets = GEN $@ 17define cmd_offsets 18 (set -e; \ 19 echo "#ifndef $2"; \ 20 echo "#define $2"; \ 21 echo "/*"; \ 22 echo " * DO NOT MODIFY."; \ 23 echo " *"; \ 24 echo " * This file was generated by Kbuild"; \ 25 echo " */"; \ 26 echo ""; \ 27 sed -ne $(sed-y) $<; \ 28 echo ""; \ 29 echo "#endif" ) > $@ 30endef 31 32##### 33# 1) Generate bounds.h 34 35bounds-file := include/generated/bounds.h 36 37always := $(bounds-file) 38targets := $(bounds-file) kernel/bounds.s 39 40# We use internal kbuild rules to avoid the "is up to date" message from make 41kernel/bounds.s: kernel/bounds.c FORCE 42 $(Q)mkdir -p $(dir $@) 43 $(call if_changed_dep,cc_s_c) 44 45$(obj)/$(bounds-file): kernel/bounds.s Kbuild 46 $(Q)mkdir -p $(dir $@) 47 $(call cmd,offsets,__LINUX_BOUNDS_H__) 48 49##### 50# 2) Generate asm-offsets.h 51# 52 53offsets-file := include/generated/asm-offsets.h 54 55always += $(offsets-file) 56targets += $(offsets-file) 57targets += arch/$(SRCARCH)/kernel/asm-offsets.s 58 59# We use internal kbuild rules to avoid the "is up to date" message from make 60arch/$(SRCARCH)/kernel/asm-offsets.s: arch/$(SRCARCH)/kernel/asm-offsets.c \ 61 $(obj)/$(bounds-file) FORCE 62 $(Q)mkdir -p $(dir $@) 63 $(call if_changed_dep,cc_s_c) 64 65$(obj)/$(offsets-file): arch/$(SRCARCH)/kernel/asm-offsets.s Kbuild 66 $(call cmd,offsets,__ASM_OFFSETS_H__) 67 68##### 69# 3) Check for missing system calls 70# 71 72always += missing-syscalls 73targets += missing-syscalls 74 75quiet_cmd_syscalls = CALL $< 76 cmd_syscalls = $(CONFIG_SHELL) $< $(CC) $(c_flags) $(missing_syscalls_flags) 77 78missing-syscalls: scripts/checksyscalls.sh $(offsets-file) FORCE 79 $(call cmd,syscalls) 80 81# Keep these two files during make clean 82no-clean-files := $(bounds-file) $(offsets-file) 83