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