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
11 offsets-file := include/asm-$(SRCARCH)/asm-offsets.h
12
13 always := $(offsets-file)
14 targets := $(offsets-file)
15 targets += arch/$(SRCARCH)/kernel/asm-offsets.s
16 clean-files := $(addprefix $(objtree)/,$(targets))
17
18 # Default sed regexp - multiline due to syntax constraints
19 define sed-y
20 "/^->/{s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; s:->::; p;}"
21 endef
22 # Override default regexp for specific architectures
23 sed-$(CONFIG_MIPS) := "/^@@@/{s/^@@@//; s/ \#.*\$$//; p;}"
24
25 quiet_cmd_offsets = GEN $@
26 define 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" ) > $@
40 endef
41
42 # We use internal kbuild rules to avoid the "is up to date" message from make
43 arch/$(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
55 quiet_cmd_syscalls = CALL $<
56 cmd_syscalls = $(CONFIG_SHELL) $< $(CC) $(c_flags)
57
58 PHONY += missing-syscalls
59 missing-syscalls: scripts/checksyscalls.sh FORCE
60 $(call cmd,syscalls)
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