| 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 |
| Kieran Bingham | f197d75 | 2016-05-23 16:24:40 -0700 | [diff] [blame] | 9 | # 5) Generate constants.py (may need bounds.h) |
| Sam Ravnborg | 86feeaa | 2005-09-09 19:28:28 +0200 | [diff] [blame] | 10 | |
| Masahiro Yamada | 39664e2 | 2015-01-05 15:57:15 +0900 | [diff] [blame] | 11 | ##### |
| 12 | # 1) Generate bounds.h |
| 13 | |
| 14 | bounds-file := include/generated/bounds.h |
| 15 | |
| 16 | always := $(bounds-file) |
| Masahiro Yamada | 8a58e16 | 2015-03-26 20:59:52 +0900 | [diff] [blame] | 17 | targets := kernel/bounds.s |
| Masahiro Yamada | 39664e2 | 2015-01-05 15:57:15 +0900 | [diff] [blame] | 18 | |
| 19 | # We use internal kbuild rules to avoid the "is up to date" message from make |
| 20 | kernel/bounds.s: kernel/bounds.c FORCE |
| Masahiro Yamada | 39664e2 | 2015-01-05 15:57:15 +0900 | [diff] [blame] | 21 | $(call if_changed_dep,cc_s_c) |
| 22 | |
| Michal Marek | 70a4fd6 | 2015-03-11 11:01:01 +0100 | [diff] [blame] | 23 | $(obj)/$(bounds-file): kernel/bounds.s FORCE |
| 24 | $(call filechk,offsets,__LINUX_BOUNDS_H__) |
| Masahiro Yamada | 39664e2 | 2015-01-05 15:57:15 +0900 | [diff] [blame] | 25 | |
| 26 | ##### |
| Nicholas Mc Guire | 0a22798 | 2015-05-18 14:19:12 +0200 | [diff] [blame] | 27 | # 2) Generate timeconst.h |
| 28 | |
| 29 | timeconst-file := include/generated/timeconst.h |
| 30 | |
| Nicholas Mc Guire | 0a22798 | 2015-05-18 14:19:12 +0200 | [diff] [blame] | 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 |
| Masahiro Yamada | 39664e2 | 2015-01-05 15:57:15 +0900 | [diff] [blame] | 46 | # |
| 47 | |
| 48 | offsets-file := include/generated/asm-offsets.h |
| 49 | |
| 50 | always += $(offsets-file) |
| Masahiro Yamada | 39664e2 | 2015-01-05 15:57:15 +0900 | [diff] [blame] | 51 | targets += arch/$(SRCARCH)/kernel/asm-offsets.s |
| 52 | |
| Sam Ravnborg | 86feeaa | 2005-09-09 19:28:28 +0200 | [diff] [blame] | 53 | # 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] | 54 | 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] | 55 | $(obj)/$(timeconst-file) $(obj)/$(bounds-file) FORCE |
| Sam Ravnborg | 86feeaa | 2005-09-09 19:28:28 +0200 | [diff] [blame] | 56 | $(call if_changed_dep,cc_s_c) |
| 57 | |
| Michal Marek | 70a4fd6 | 2015-03-11 11:01:01 +0100 | [diff] [blame] | 58 | $(obj)/$(offsets-file): arch/$(SRCARCH)/kernel/asm-offsets.s FORCE |
| 59 | $(call filechk,offsets,__ASM_OFFSETS_H__) |
| Sam Ravnborg | 86feeaa | 2005-09-09 19:28:28 +0200 | [diff] [blame] | 60 | |
| Sam Ravnborg | c53aeca | 2007-03-27 22:50:29 +0200 | [diff] [blame] | 61 | ##### |
| Nicholas Mc Guire | 0a22798 | 2015-05-18 14:19:12 +0200 | [diff] [blame] | 62 | # 4) Check for missing system calls |
| Sam Ravnborg | c53aeca | 2007-03-27 22:50:29 +0200 | [diff] [blame] | 63 | # |
| 64 | |
| Arnaud Lacombe | 5f7efb4 | 2011-08-24 21:03:30 -0400 | [diff] [blame] | 65 | always += missing-syscalls |
| 66 | targets += missing-syscalls |
| 67 | |
| Sam Ravnborg | c53aeca | 2007-03-27 22:50:29 +0200 | [diff] [blame] | 68 | quiet_cmd_syscalls = CALL $< |
| David Daney | 44656fa | 2011-11-08 10:20:10 -0800 | [diff] [blame] | 69 | cmd_syscalls = $(CONFIG_SHELL) $< $(CC) $(c_flags) $(missing_syscalls_flags) |
| Sam Ravnborg | c53aeca | 2007-03-27 22:50:29 +0200 | [diff] [blame] | 70 | |
| Arnaud Lacombe | 5f7efb4 | 2011-08-24 21:03:30 -0400 | [diff] [blame] | 71 | missing-syscalls: scripts/checksyscalls.sh $(offsets-file) FORCE |
| Sam Ravnborg | c53aeca | 2007-03-27 22:50:29 +0200 | [diff] [blame] | 72 | $(call cmd,syscalls) |
| Christoph Lameter | 1cdf25d | 2008-04-28 02:12:44 -0700 | [diff] [blame] | 73 | |
| Kieran Bingham | f197d75 | 2016-05-23 16:24:40 -0700 | [diff] [blame] | 74 | ##### |
| 75 | # 5) Generate constants for Python GDB integration |
| 76 | # |
| 77 | |
| 78 | extra-$(CONFIG_GDB_SCRIPTS) += build_constants_py |
| 79 | |
| 80 | build_constants_py: $(obj)/$(timeconst-file) $(obj)/$(bounds-file) |
| 81 | @$(MAKE) $(build)=scripts/gdb/linux $@ |
| 82 | |
| Nicholas Mc Guire | 0a22798 | 2015-05-18 14:19:12 +0200 | [diff] [blame] | 83 | # Keep these three files during make clean |
| 84 | no-clean-files := $(bounds-file) $(offsets-file) $(timeconst-file) |