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Commit | Line | Data |
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b2441318 | 1 | # SPDX-License-Identifier: GPL-2.0 |
86feeaa8 SR |
2 | # |
3 | # Kbuild for top-level directory of the kernel | |
4 | # This file takes care of the following: | |
1cdf25d7 | 5 | # 1) Generate bounds.h |
0a227985 NMG |
6 | # 2) Generate timeconst.h |
7 | # 3) Generate asm-offsets.h (may need bounds.h and timeconst.h) | |
8 | # 4) Check for missing system calls | |
f197d75f | 9 | # 5) Generate constants.py (may need bounds.h) |
86feeaa8 | 10 | |
39664e2f MY |
11 | ##### |
12 | # 1) Generate bounds.h | |
13 | ||
14 | bounds-file := include/generated/bounds.h | |
15 | ||
16 | always := $(bounds-file) | |
8a58e162 | 17 | targets := kernel/bounds.s |
39664e2f | 18 | |
70a4fd6c MM |
19 | $(obj)/$(bounds-file): kernel/bounds.s FORCE |
20 | $(call filechk,offsets,__LINUX_BOUNDS_H__) | |
1cdf25d7 CL |
21 | |
22 | ##### | |
0a227985 NMG |
23 | # 2) Generate timeconst.h |
24 | ||
25 | timeconst-file := include/generated/timeconst.h | |
26 | ||
0a227985 NMG |
27 | targets += $(timeconst-file) |
28 | ||
29 | quiet_cmd_gentimeconst = GEN $@ | |
30 | define cmd_gentimeconst | |
31 | (echo $(CONFIG_HZ) | bc -q $< ) > $@ | |
32 | endef | |
33 | define filechk_gentimeconst | |
34 | (echo $(CONFIG_HZ) | bc -q $< ) | |
35 | endef | |
36 | ||
37 | $(obj)/$(timeconst-file): kernel/time/timeconst.bc FORCE | |
38 | $(call filechk,gentimeconst) | |
39 | ||
40 | ##### | |
41 | # 3) Generate asm-offsets.h | |
86feeaa8 SR |
42 | # |
43 | ||
559df2e0 | 44 | offsets-file := include/generated/asm-offsets.h |
86feeaa8 | 45 | |
1cdf25d7 | 46 | always += $(offsets-file) |
6752ed90 | 47 | targets += arch/$(SRCARCH)/kernel/asm-offsets.s |
1cdf25d7 | 48 | |
4d4b5c2e | 49 | arch/$(SRCARCH)/kernel/asm-offsets.s: $(obj)/$(timeconst-file) $(obj)/$(bounds-file) |
86feeaa8 | 50 | |
70a4fd6c MM |
51 | $(obj)/$(offsets-file): arch/$(SRCARCH)/kernel/asm-offsets.s FORCE |
52 | $(call filechk,offsets,__ASM_OFFSETS_H__) | |
86feeaa8 | 53 | |
c53aeca0 | 54 | ##### |
0a227985 | 55 | # 4) Check for missing system calls |
c53aeca0 SR |
56 | # |
57 | ||
5f7efb4c AL |
58 | always += missing-syscalls |
59 | targets += missing-syscalls | |
60 | ||
c53aeca0 | 61 | quiet_cmd_syscalls = CALL $< |
44656fa0 | 62 | cmd_syscalls = $(CONFIG_SHELL) $< $(CC) $(c_flags) $(missing_syscalls_flags) |
c53aeca0 | 63 | |
5f7efb4c | 64 | missing-syscalls: scripts/checksyscalls.sh $(offsets-file) FORCE |
c53aeca0 | 65 | $(call cmd,syscalls) |
1cdf25d7 | 66 | |
f197d75f KB |
67 | ##### |
68 | # 5) Generate constants for Python GDB integration | |
69 | # | |
70 | ||
71 | extra-$(CONFIG_GDB_SCRIPTS) += build_constants_py | |
72 | ||
73 | build_constants_py: $(obj)/$(timeconst-file) $(obj)/$(bounds-file) | |
74 | @$(MAKE) $(build)=scripts/gdb/linux $@ | |
75 | ||
0a227985 NMG |
76 | # Keep these three files during make clean |
77 | no-clean-files := $(bounds-file) $(offsets-file) $(timeconst-file) |