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Commit | Line | Data |
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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 | # Default sed regexp - multiline due to syntax constraints | |
9 | define sed-y | |
10 | "/^->/{s:->#\(.*\):/* \1 */:; \ | |
11 | s:^->\([^ ]*\) [\$$#]*\([-0-9]*\) \(.*\):#define \1 \2 /* \3 */:; \ | |
12 | s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; \ | |
13 | s:->::; p;}" | |
14 | endef | |
15 | ||
16 | # Use filechk to avoid rebuilds when a header changes, but the resulting file | |
17 | # does not | |
18 | define filechk_offsets | |
19 | (set -e; \ | |
20 | echo "#ifndef $2"; \ | |
21 | echo "#define $2"; \ | |
22 | echo "/*"; \ | |
23 | echo " * DO NOT MODIFY."; \ | |
24 | echo " *"; \ | |
25 | echo " * This file was generated by Kbuild"; \ | |
26 | echo " */"; \ | |
27 | echo ""; \ | |
28 | sed -ne $(sed-y); \ | |
29 | echo ""; \ | |
30 | echo "#endif" ) | |
31 | endef | |
32 | ||
33 | ##### | |
34 | # 1) Generate bounds.h | |
35 | ||
36 | bounds-file := include/generated/bounds.h | |
37 | ||
38 | always := $(bounds-file) | |
39 | targets := kernel/bounds.s | |
40 | ||
41 | # We use internal kbuild rules to avoid the "is up to date" message from make | |
42 | kernel/bounds.s: kernel/bounds.c FORCE | |
43 | $(Q)mkdir -p $(dir $@) | |
44 | $(call if_changed_dep,cc_s_c) | |
45 | ||
46 | $(obj)/$(bounds-file): kernel/bounds.s FORCE | |
47 | $(call filechk,offsets,__LINUX_BOUNDS_H__) | |
48 | ||
49 | ##### | |
50 | # 2) Generate asm-offsets.h | |
51 | # | |
52 | ||
53 | offsets-file := include/generated/asm-offsets.h | |
54 | ||
55 | always += $(offsets-file) | |
56 | targets += arch/$(SRCARCH)/kernel/asm-offsets.s | |
57 | ||
58 | # We use internal kbuild rules to avoid the "is up to date" message from make | |
59 | arch/$(SRCARCH)/kernel/asm-offsets.s: arch/$(SRCARCH)/kernel/asm-offsets.c \ | |
60 | $(obj)/$(bounds-file) FORCE | |
61 | $(Q)mkdir -p $(dir $@) | |
62 | $(call if_changed_dep,cc_s_c) | |
63 | ||
64 | $(obj)/$(offsets-file): arch/$(SRCARCH)/kernel/asm-offsets.s FORCE | |
65 | $(call filechk,offsets,__ASM_OFFSETS_H__) | |
66 | ||
67 | ##### | |
68 | # 3) Check for missing system calls | |
69 | # | |
70 | ||
71 | always += missing-syscalls | |
72 | targets += missing-syscalls | |
73 | ||
74 | quiet_cmd_syscalls = CALL $< | |
75 | cmd_syscalls = $(CONFIG_SHELL) $< $(CC) $(c_flags) $(missing_syscalls_flags) | |
76 | ||
77 | missing-syscalls: scripts/checksyscalls.sh $(offsets-file) FORCE | |
78 | $(call cmd,syscalls) | |
79 | ||
80 | # Keep these two files during make clean | |
81 | no-clean-files := $(bounds-file) $(offsets-file) |