001 #
002 # Kbuild for top-level directory of the kernel
003 # This file takes care of the following:
004 # 1) Generate asm-offsets.h
005 # 2) Check for missing system calls
006
007 #####
008 # 1) Generate asm-offsets.h
009 #
010
011 offsets-file := include/asm-$(SRCARCH)/asm-offsets.h
012
013 always := $(offsets-file)
014 targets := $(offsets-file)
015 targets += arch/$(SRCARCH)/kernel/asm-offsets.s
016 clean-files := $(addprefix $(objtree)/,$(targets))
017
018 # Default sed regexp - multiline due to syntax constraints
019 define sed-y
020 "/^->/{s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; s:->::; p;}"
021 endef
022 # Override default regexp for specific architectures
023 sed-$(CONFIG_MIPS) := "/^@@@/{s/^@@@//; s/ \#.*\$$//; p;}"
024
025 quiet_cmd_offsets = GEN $@
026 define cmd_offsets
027 (set -e; \
028 echo "#ifndef __ASM_OFFSETS_H__"; \
029 echo "#define __ASM_OFFSETS_H__"; \
030 echo "/*"; \
031 echo " * DO NOT MODIFY."; \
032 echo " *"; \
033 echo " * This file was generated by Kbuild"; \
034 echo " *"; \
035 echo " */"; \
036 echo ""; \
037 sed -ne $(sed-y) $<; \
038 echo ""; \
039 echo "#endif" ) > $@
040 endef
041
042 # We use internal kbuild rules to avoid the "is up to date" message from make
043 arch/$(SRCARCH)/kernel/asm-offsets.s: arch/$(SRCARCH)/kernel/asm-offsets.c FORCE
044 $(Q)mkdir -p $(dir $@)
045 $(call if_changed_dep,cc_s_c)
046
047 $(obj)/$(offsets-file): arch/$(SRCARCH)/kernel/asm-offsets.s Kbuild
048 $(Q)mkdir -p $(dir $@)
049 $(call cmd,offsets)
050
051 #####
052 # 2) Check for missing system calls
053 #
054
055 quiet_cmd_syscalls = CALL $<
056 cmd_syscalls = $(CONFIG_SHELL) $< $(CC) $(c_flags)
057
058 PHONY += missing-syscalls
059 missing-syscalls: scripts/checksyscalls.sh FORCE
060 $(call cmd,syscalls)
