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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 timeconst.h | |
6 | # 3) Generate asm-offsets.h (may need bounds.h and timeconst.h) | |
7 | # 4) Check for missing system calls | |
8 | # 5) Generate constants.py (may need bounds.h) | |
9 | ||
10 | ##### | |
11 | # 1) Generate bounds.h | |
12 | ||
13 | bounds-file := include/generated/bounds.h | |
14 | ||
15 | always := $(bounds-file) | |
16 | targets := kernel/bounds.s | |
17 | ||
18 | # We use internal kbuild rules to avoid the "is up to date" message from make | |
19 | kernel/bounds.s: kernel/bounds.c FORCE | |
20 | $(Q)mkdir -p $(dir $@) | |
21 | $(call if_changed_dep,cc_s_c) | |
22 | ||
23 | $(obj)/$(bounds-file): kernel/bounds.s FORCE | |
24 | $(call filechk,offsets,__LINUX_BOUNDS_H__) | |
25 | ||
26 | ##### | |
27 | # 2) Generate timeconst.h | |
28 | ||
29 | timeconst-file := include/generated/timeconst.h | |
30 | ||
31 | targets += $(timeconst-file) | |
32 | ||
33 | quiet_cmd_gentimeconst = GEN $@ | |
34 | define cmd_gentimeconst | |
35 | (echo $(CONFIG_HZ) | bc -q $< ) > $@ | |
36 | endef | |
37 | define filechk_gentimeconst | |
38 | (echo $(CONFIG_HZ) | bc -q $< ) | |
39 | endef | |
40 | ||
41 | $(obj)/$(timeconst-file): kernel/time/timeconst.bc FORCE | |
42 | $(call filechk,gentimeconst) | |
43 | ||
44 | ##### | |
45 | # 3) Generate asm-offsets.h | |
46 | # | |
47 | ||
48 | offsets-file := include/generated/asm-offsets.h | |
49 | ||
50 | always += $(offsets-file) | |
51 | targets += arch/$(SRCARCH)/kernel/asm-offsets.s | |
52 | ||
53 | # We use internal kbuild rules to avoid the "is up to date" message from make | |
54 | arch/$(SRCARCH)/kernel/asm-offsets.s: arch/$(SRCARCH)/kernel/asm-offsets.c \ | |
55 | $(obj)/$(timeconst-file) $(obj)/$(bounds-file) FORCE | |
56 | $(Q)mkdir -p $(dir $@) | |
57 | $(call if_changed_dep,cc_s_c) | |
58 | ||
59 | $(obj)/$(offsets-file): arch/$(SRCARCH)/kernel/asm-offsets.s FORCE | |
60 | $(call filechk,offsets,__ASM_OFFSETS_H__) | |
61 | ||
62 | ##### | |
63 | # 4) Check for missing system calls | |
64 | # | |
65 | ||
66 | always += missing-syscalls | |
67 | targets += missing-syscalls | |
68 | ||
69 | quiet_cmd_syscalls = CALL $< | |
70 | cmd_syscalls = $(CONFIG_SHELL) $< $(CC) $(c_flags) $(missing_syscalls_flags) | |
71 | ||
72 | missing-syscalls: scripts/checksyscalls.sh $(offsets-file) FORCE | |
73 | $(call cmd,syscalls) | |
74 | ||
75 | ##### | |
76 | # 5) Generate constants for Python GDB integration | |
77 | # | |
78 | ||
79 | extra-$(CONFIG_GDB_SCRIPTS) += build_constants_py | |
80 | ||
81 | build_constants_py: $(obj)/$(timeconst-file) $(obj)/$(bounds-file) | |
82 | @$(MAKE) $(build)=scripts/gdb/linux $@ | |
83 | ||
84 | # Keep these three files during make clean | |
85 | no-clean-files := $(bounds-file) $(offsets-file) $(timeconst-file) |