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
6 #####
7 # 1) Generate asm-offsets.h
8 #
9
10 offsets-file := include/asm-$(ARCH)/asm-offsets.h
11
12 always := $(offsets-file)
13 targets := $(offsets-file)
14 targets += arch/$(ARCH)/kernel/asm-offsets.s
15
16 # Default sed regexp - multiline due to syntax constraints
17 define sed-y
18 "/^->/{s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; s:->::; p;}"
19 endef
20 # Override default regexp for specific architectures
21 sed-$(CONFIG_MIPS) := "/^@@@/{s/^@@@//; s/ \#.*\$$//; p;}"
22
23 quiet_cmd_offsets = GEN $@
24 define cmd_offsets
25 (set -e; \
26 echo "#ifndef __ASM_OFFSETS_H__"; \
27 echo "#define __ASM_OFFSETS_H__"; \
28 echo "/*"; \
29 echo " * DO NOT MODIFY."; \
30 echo " *"; \
31 echo " * This file was generated by $(srctree)/Kbuild"; \
32 echo " *"; \
33 echo " */"; \
34 echo ""; \
35 sed -ne $(sed-y) $<; \
36 echo ""; \
37 echo "#endif" ) > $@
38 endef
39
40 # We use internal kbuild rules to avoid the "is up to date" message from make
41 arch/$(ARCH)/kernel/asm-offsets.s: arch/$(ARCH)/kernel/asm-offsets.c FORCE
42 $(Q)mkdir -p $(dir $@)
43 $(call if_changed_dep,cc_s_c)
44
45 $(obj)/$(offsets-file): arch/$(ARCH)/kernel/asm-offsets.s Kbuild
46 $(Q)mkdir -p $(dir $@)
47 $(call cmd,offsets)
48
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