| Greg Kroah-Hartman | b244131 | 2017-11-01 15:07:57 +0100 | [diff] [blame] | 1 | # SPDX-License-Identifier: GPL-2.0 |
| Sam Ravnborg | 86feeaa | 2005-09-09 19:28:28 +0200 | [diff] [blame] | 2 | # |
| 3 | # Kbuild for top-level directory of the kernel |
| 4 | # This file takes care of the following: |
| Christoph Lameter | 1cdf25d | 2008-04-28 02:12:44 -0700 | [diff] [blame] | 5 | # 1) Generate bounds.h |
| Nicholas Mc Guire | 0a22798 | 2015-05-18 14:19:12 +0200 | [diff] [blame] | 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 |
| Mark Rutland | 8d32588 | 2018-09-04 11:48:29 +0100 | [diff] [blame] | 9 | # 5) check atomics headers are up-to-date |
| 10 | # 6) Generate constants.py (may need bounds.h) |
| Sam Ravnborg | 86feeaa | 2005-09-09 19:28:28 +0200 | [diff] [blame] | 11 | |
| Masahiro Yamada | 39664e2 | 2015-01-05 15:57:15 +0900 | [diff] [blame] | 12 | ##### |
| 13 | # 1) Generate bounds.h |
| 14 | |
| 15 | bounds-file := include/generated/bounds.h |
| 16 | |
| 17 | always := $(bounds-file) |
| Masahiro Yamada | 8a58e16 | 2015-03-26 20:59:52 +0900 | [diff] [blame] | 18 | targets := kernel/bounds.s |
| Masahiro Yamada | 39664e2 | 2015-01-05 15:57:15 +0900 | [diff] [blame] | 19 | |
| 20 | # We use internal kbuild rules to avoid the "is up to date" message from make |
| 21 | kernel/bounds.s: kernel/bounds.c FORCE |
| Masahiro Yamada | 39664e2 | 2015-01-05 15:57:15 +0900 | [diff] [blame] | 22 | $(call if_changed_dep,cc_s_c) |
| 23 | |
| Michal Marek | 70a4fd6 | 2015-03-11 11:01:01 +0100 | [diff] [blame] | 24 | $(obj)/$(bounds-file): kernel/bounds.s FORCE |
| 25 | $(call filechk,offsets,__LINUX_BOUNDS_H__) |
| Masahiro Yamada | 39664e2 | 2015-01-05 15:57:15 +0900 | [diff] [blame] | 26 | |
| 27 | ##### |
| Nicholas Mc Guire | 0a22798 | 2015-05-18 14:19:12 +0200 | [diff] [blame] | 28 | # 2) Generate timeconst.h |
| 29 | |
| 30 | timeconst-file := include/generated/timeconst.h |
| 31 | |
| Nicholas Mc Guire | 0a22798 | 2015-05-18 14:19:12 +0200 | [diff] [blame] | 32 | targets += $(timeconst-file) |
| 33 | |
| 34 | quiet_cmd_gentimeconst = GEN $@ |
| 35 | define cmd_gentimeconst |
| 36 | (echo $(CONFIG_HZ) | bc -q $< ) > $@ |
| 37 | endef |
| 38 | define filechk_gentimeconst |
| 39 | (echo $(CONFIG_HZ) | bc -q $< ) |
| 40 | endef |
| 41 | |
| 42 | $(obj)/$(timeconst-file): kernel/time/timeconst.bc FORCE |
| 43 | $(call filechk,gentimeconst) |
| 44 | |
| 45 | ##### |
| 46 | # 3) Generate asm-offsets.h |
| Masahiro Yamada | 39664e2 | 2015-01-05 15:57:15 +0900 | [diff] [blame] | 47 | # |
| 48 | |
| 49 | offsets-file := include/generated/asm-offsets.h |
| 50 | |
| 51 | always += $(offsets-file) |
| Masahiro Yamada | 39664e2 | 2015-01-05 15:57:15 +0900 | [diff] [blame] | 52 | targets += arch/$(SRCARCH)/kernel/asm-offsets.s |
| 53 | |
| Sam Ravnborg | 86feeaa | 2005-09-09 19:28:28 +0200 | [diff] [blame] | 54 | # We use internal kbuild rules to avoid the "is up to date" message from make |
| Christoph Lameter | 1cdf25d | 2008-04-28 02:12:44 -0700 | [diff] [blame] | 55 | arch/$(SRCARCH)/kernel/asm-offsets.s: arch/$(SRCARCH)/kernel/asm-offsets.c \ |
| Nicholas Mc Guire | 0a22798 | 2015-05-18 14:19:12 +0200 | [diff] [blame] | 56 | $(obj)/$(timeconst-file) $(obj)/$(bounds-file) FORCE |
| Sam Ravnborg | 86feeaa | 2005-09-09 19:28:28 +0200 | [diff] [blame] | 57 | $(call if_changed_dep,cc_s_c) |
| 58 | |
| Michal Marek | 70a4fd6 | 2015-03-11 11:01:01 +0100 | [diff] [blame] | 59 | $(obj)/$(offsets-file): arch/$(SRCARCH)/kernel/asm-offsets.s FORCE |
| 60 | $(call filechk,offsets,__ASM_OFFSETS_H__) |
| Sam Ravnborg | 86feeaa | 2005-09-09 19:28:28 +0200 | [diff] [blame] | 61 | |
| Sam Ravnborg | c53aeca | 2007-03-27 22:50:29 +0200 | [diff] [blame] | 62 | ##### |
| Nicholas Mc Guire | 0a22798 | 2015-05-18 14:19:12 +0200 | [diff] [blame] | 63 | # 4) Check for missing system calls |
| Sam Ravnborg | c53aeca | 2007-03-27 22:50:29 +0200 | [diff] [blame] | 64 | # |
| 65 | |
| Arnaud Lacombe | 5f7efb4 | 2011-08-24 21:03:30 -0400 | [diff] [blame] | 66 | always += missing-syscalls |
| 67 | targets += missing-syscalls |
| 68 | |
| Sam Ravnborg | c53aeca | 2007-03-27 22:50:29 +0200 | [diff] [blame] | 69 | quiet_cmd_syscalls = CALL $< |
| David Daney | 44656fa | 2011-11-08 10:20:10 -0800 | [diff] [blame] | 70 | cmd_syscalls = $(CONFIG_SHELL) $< $(CC) $(c_flags) $(missing_syscalls_flags) |
| Sam Ravnborg | c53aeca | 2007-03-27 22:50:29 +0200 | [diff] [blame] | 71 | |
| Arnaud Lacombe | 5f7efb4 | 2011-08-24 21:03:30 -0400 | [diff] [blame] | 72 | missing-syscalls: scripts/checksyscalls.sh $(offsets-file) FORCE |
| Sam Ravnborg | c53aeca | 2007-03-27 22:50:29 +0200 | [diff] [blame] | 73 | $(call cmd,syscalls) |
| Christoph Lameter | 1cdf25d | 2008-04-28 02:12:44 -0700 | [diff] [blame] | 74 | |
| Kieran Bingham | f197d75 | 2016-05-23 16:24:40 -0700 | [diff] [blame] | 75 | ##### |
| Mark Rutland | 8d32588 | 2018-09-04 11:48:29 +0100 | [diff] [blame] | 76 | # 5) Check atomic headers are up-to-date |
| 77 | # |
| 78 | |
| 79 | always += old-atomics |
| 80 | targets += old-atomics |
| 81 | |
| 82 | quiet_cmd_atomics = CALL $< |
| Borislav Petkov | bdf37b4 | 2018-11-08 20:41:28 +0100 | [diff] [blame^] | 83 | cmd_atomics = $(CONFIG_SHELL) $< |
| Mark Rutland | 8d32588 | 2018-09-04 11:48:29 +0100 | [diff] [blame] | 84 | |
| 85 | old-atomics: scripts/atomic/check-atomics.sh FORCE |
| 86 | $(call cmd,atomics) |
| 87 | |
| 88 | ##### |
| 89 | # 6) Generate constants for Python GDB integration |
| Kieran Bingham | f197d75 | 2016-05-23 16:24:40 -0700 | [diff] [blame] | 90 | # |
| 91 | |
| 92 | extra-$(CONFIG_GDB_SCRIPTS) += build_constants_py |
| 93 | |
| 94 | build_constants_py: $(obj)/$(timeconst-file) $(obj)/$(bounds-file) |
| 95 | @$(MAKE) $(build)=scripts/gdb/linux $@ |
| 96 | |
| Nicholas Mc Guire | 0a22798 | 2015-05-18 14:19:12 +0200 | [diff] [blame] | 97 | # Keep these three files during make clean |
| 98 | no-clean-files := $(bounds-file) $(offsets-file) $(timeconst-file) |