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#
# Kbuild for top-level directory of the kernel
# This file takes care of the following:
# 1) Generate asm-offsets.h
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# 2) Check for missing system calls
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#####
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# 1) Generate asm-offsets.h
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#

offsets-file := include/asm-$(ARCH)/asm-offsets.h

always  := $(offsets-file)
targets := $(offsets-file)
targets += arch/$(ARCH)/kernel/asm-offsets.s
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clean-files := $(addprefix $(objtree)/,$(targets))
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# 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
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sed-$(CONFIG_MIPS) := "/^@@@/{s/^@@@//; s/ \#.*\$$//; p;}"
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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 " *"; \
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	 echo " * This file was generated by Kbuild"; \
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	 echo " *"; \
	 echo " */"; \
	 echo ""; \
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	 sed -ne $(sed-y) $<; \
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	 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)

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$(obj)/$(offsets-file): arch/$(ARCH)/kernel/asm-offsets.s Kbuild
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	$(Q)mkdir -p $(dir $@)
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	$(call cmd,offsets)

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#####
# 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)