1 #
2 # Kbuild for top-level directory of the kernel
3 # This file takes care of the following:
4 # 1) Generate bounds.h
5 # 2) Generate asm-offsets.h (may need bounds.h)
6 # 3) Check for missing system calls
7
8 #####
9 # 1) Generate bounds.h
10
11 bounds-file := include/linux/bounds.h
12
13 always := $(bounds-file)
14 targets := $(bounds-file) kernel/bounds.s
15
16 quiet_cmd_bounds = GEN $@
17 define cmd_bounds
18 (set -e; \
19 echo "#ifndef __LINUX_BOUNDS_H__"; \
20 echo "#define __LINUX_BOUNDS_H__"; \
21 echo "/*"; \
22 echo " * DO NOT MODIFY."; \
23 echo " *"; \
24 echo " * This file was generated by Kbuild"; \
25 echo " *"; \
26 echo " */"; \
27 echo ""; \
28 sed -ne $(sed-y) $<; \
29 echo ""; \
30 echo "#endif" ) > $@
31 endef
32
33 # We use internal kbuild rules to avoid the "is up to date" message from make
34 kernel/bounds.s: kernel/bounds.c FORCE
35 $(Q)mkdir -p $(dir $@)
36 $(call if_changed_dep,cc_s_c)
37
38 $(obj)/$(bounds-file): kernel/bounds.s Kbuild
39 $(Q)mkdir -p $(dir $@)
40 $(call cmd,bounds)
41
42 #####
43 # 2) Generate asm-offsets.h
44 #
45
46 offsets-file := include/asm/asm-offsets.h
47
48 always += $(offsets-file)
49 targets += $(offsets-file)
50 targets += arch/$(SRCARCH)/kernel/asm-offsets.s
51
52
53 # Default sed regexp - multiline due to syntax constraints
54 define sed-y
55 "/^->/{s:->#\(.*\):/* \1 */:; \
56 s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; \
57 s:->::; p;}"
58 endef
59
60 quiet_cmd_offsets = GEN $@
61 define cmd_offsets
62 (set -e; \
63 echo "#ifndef __ASM_OFFSETS_H__"; \
64 echo "#define __ASM_OFFSETS_H__"; \
65 echo "/*"; \
66 echo " * DO NOT MODIFY."; \
67 echo " *"; \
68 echo " * This file was generated by Kbuild"; \
69 echo " *"; \
70 echo " */"; \
71 echo ""; \
72 sed -ne $(sed-y) $<; \
73 echo ""; \
74 echo "#endif" ) > $@
75 endef
76
77 # We use internal kbuild rules to avoid the "is up to date" message from make
78 arch/$(SRCARCH)/kernel/asm-offsets.s: arch/$(SRCARCH)/kernel/asm-offsets.c \
79 $(obj)/$(bounds-file) FORCE
80 $(Q)mkdir -p $(dir $@)
81 $(call if_changed_dep,cc_s_c)
82
83 $(obj)/$(offsets-file): arch/$(SRCARCH)/kernel/asm-offsets.s Kbuild
84 $(call cmd,offsets)
85
86 #####
87 # 3) Check for missing system calls
88 #
89
90 quiet_cmd_syscalls = CALL $<
91 cmd_syscalls = $(CONFIG_SHELL) $< $(CC) $(c_flags)
92
93 PHONY += missing-syscalls
94 missing-syscalls: scripts/checksyscalls.sh FORCE
95 $(call cmd,syscalls)
96
97 # Delete all targets during make clean
98 clean-files := $(addprefix $(objtree)/,$(filter-out $(bounds-file) $(offsets-file),$(targets)))
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