blob: 94c752762bc26530f8024162140c9da9d08b5167 [file] [log] [blame]
Sam Ravnborg86feeaa2005-09-09 19:28:28 +02001#
2# Kbuild for top-level directory of the kernel
3# This file takes care of the following:
Christoph Lameter1cdf25d2008-04-28 02:12:44 -07004# 1) Generate bounds.h
Nicholas Mc Guire0a227982015-05-18 14:19:12 +02005# 2) Generate timeconst.h
6# 3) Generate asm-offsets.h (may need bounds.h and timeconst.h)
7# 4) Check for missing system calls
Kieran Binghamf197d752016-05-23 16:24:40 -07008# 5) Generate constants.py (may need bounds.h)
Sam Ravnborg86feeaa2005-09-09 19:28:28 +02009
Masahiro Yamada39664e22015-01-05 15:57:15 +090010#####
11# 1) Generate bounds.h
12
13bounds-file := include/generated/bounds.h
14
15always := $(bounds-file)
Masahiro Yamada8a58e162015-03-26 20:59:52 +090016targets := kernel/bounds.s
Masahiro Yamada39664e22015-01-05 15:57:15 +090017
18# We use internal kbuild rules to avoid the "is up to date" message from make
19kernel/bounds.s: kernel/bounds.c FORCE
20 $(Q)mkdir -p $(dir $@)
21 $(call if_changed_dep,cc_s_c)
22
Michal Marek70a4fd62015-03-11 11:01:01 +010023$(obj)/$(bounds-file): kernel/bounds.s FORCE
24 $(call filechk,offsets,__LINUX_BOUNDS_H__)
Masahiro Yamada39664e22015-01-05 15:57:15 +090025
26#####
Nicholas Mc Guire0a227982015-05-18 14:19:12 +020027# 2) Generate timeconst.h
28
29timeconst-file := include/generated/timeconst.h
30
Nicholas Mc Guire0a227982015-05-18 14:19:12 +020031targets += $(timeconst-file)
32
33quiet_cmd_gentimeconst = GEN $@
34define cmd_gentimeconst
35 (echo $(CONFIG_HZ) | bc -q $< ) > $@
36endef
37define filechk_gentimeconst
38 (echo $(CONFIG_HZ) | bc -q $< )
39endef
40
41$(obj)/$(timeconst-file): kernel/time/timeconst.bc FORCE
42 $(call filechk,gentimeconst)
43
44#####
45# 3) Generate asm-offsets.h
Masahiro Yamada39664e22015-01-05 15:57:15 +090046#
47
48offsets-file := include/generated/asm-offsets.h
49
50always += $(offsets-file)
Masahiro Yamada39664e22015-01-05 15:57:15 +090051targets += arch/$(SRCARCH)/kernel/asm-offsets.s
52
Sam Ravnborg86feeaa2005-09-09 19:28:28 +020053# We use internal kbuild rules to avoid the "is up to date" message from make
Christoph Lameter1cdf25d2008-04-28 02:12:44 -070054arch/$(SRCARCH)/kernel/asm-offsets.s: arch/$(SRCARCH)/kernel/asm-offsets.c \
Nicholas Mc Guire0a227982015-05-18 14:19:12 +020055 $(obj)/$(timeconst-file) $(obj)/$(bounds-file) FORCE
Sam Ravnborg86feeaa2005-09-09 19:28:28 +020056 $(Q)mkdir -p $(dir $@)
57 $(call if_changed_dep,cc_s_c)
58
Michal Marek70a4fd62015-03-11 11:01:01 +010059$(obj)/$(offsets-file): arch/$(SRCARCH)/kernel/asm-offsets.s FORCE
60 $(call filechk,offsets,__ASM_OFFSETS_H__)
Sam Ravnborg86feeaa2005-09-09 19:28:28 +020061
Sam Ravnborgc53aeca2007-03-27 22:50:29 +020062#####
Nicholas Mc Guire0a227982015-05-18 14:19:12 +020063# 4) Check for missing system calls
Sam Ravnborgc53aeca2007-03-27 22:50:29 +020064#
65
Arnaud Lacombe5f7efb42011-08-24 21:03:30 -040066always += missing-syscalls
67targets += missing-syscalls
68
Sam Ravnborgc53aeca2007-03-27 22:50:29 +020069quiet_cmd_syscalls = CALL $<
David Daney44656fa2011-11-08 10:20:10 -080070 cmd_syscalls = $(CONFIG_SHELL) $< $(CC) $(c_flags) $(missing_syscalls_flags)
Sam Ravnborgc53aeca2007-03-27 22:50:29 +020071
Arnaud Lacombe5f7efb42011-08-24 21:03:30 -040072missing-syscalls: scripts/checksyscalls.sh $(offsets-file) FORCE
Sam Ravnborgc53aeca2007-03-27 22:50:29 +020073 $(call cmd,syscalls)
Christoph Lameter1cdf25d2008-04-28 02:12:44 -070074
Kieran Binghamf197d752016-05-23 16:24:40 -070075#####
76# 5) Generate constants for Python GDB integration
77#
78
79extra-$(CONFIG_GDB_SCRIPTS) += build_constants_py
80
81build_constants_py: $(obj)/$(timeconst-file) $(obj)/$(bounds-file)
82 @$(MAKE) $(build)=scripts/gdb/linux $@
83
Nicholas Mc Guire0a227982015-05-18 14:19:12 +020084# Keep these three files during make clean
85no-clean-files := $(bounds-file) $(offsets-file) $(timeconst-file)