projects / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 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 | |
| 1cdf25d7 CL |
19 | # We use internal kbuild rules to avoid the "is up to date" message from make |
| 20 | kernel/bounds.s: kernel/bounds.c FORCE | |
| 21 | $(Q)mkdir -p $(dir $@) | |
| 22 | $(call if_changed_dep,cc_s_c) | |
| 23 | ||
| 70a4fd6c MM |
24 | $(obj)/$(bounds-file): kernel/bounds.s FORCE |
| 25 | $(call filechk,offsets,__LINUX_BOUNDS_H__) | |
| 1cdf25d7 CL |
26 | |
| 27 | ##### | |
| 0a227985 NMG |
28 | # 2) Generate timeconst.h |
| 29 | ||
| 30 | timeconst-file := include/generated/timeconst.h | |
| 31 | ||
| 0a227985 NMG |
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 | |
| 86feeaa8 SR |
47 | # |
| 48 | ||
| 559df2e0 | 49 | offsets-file := include/generated/asm-offsets.h |
| 86feeaa8 | 50 | |
| 1cdf25d7 | 51 | always += $(offsets-file) |
| 6752ed90 | 52 | targets += arch/$(SRCARCH)/kernel/asm-offsets.s |
| 1cdf25d7 | 53 | |
| 86feeaa8 | 54 | # We use internal kbuild rules to avoid the "is up to date" message from make |
| 1cdf25d7 | 55 | arch/$(SRCARCH)/kernel/asm-offsets.s: arch/$(SRCARCH)/kernel/asm-offsets.c \ |
| 0a227985 | 56 | $(obj)/$(timeconst-file) $(obj)/$(bounds-file) FORCE |
| 86feeaa8 SR |
57 | $(Q)mkdir -p $(dir $@) |
| 58 | $(call if_changed_dep,cc_s_c) | |
| 59 | ||
| 70a4fd6c MM |
60 | $(obj)/$(offsets-file): arch/$(SRCARCH)/kernel/asm-offsets.s FORCE |
| 61 | $(call filechk,offsets,__ASM_OFFSETS_H__) | |
| 86feeaa8 | 62 | |
| c53aeca0 | 63 | ##### |
| 0a227985 | 64 | # 4) Check for missing system calls |
| c53aeca0 SR |
65 | # |
| 66 | ||
| 5f7efb4c AL |
67 | always += missing-syscalls |
| 68 | targets += missing-syscalls | |
| 69 | ||
| c53aeca0 | 70 | quiet_cmd_syscalls = CALL $< |
| 44656fa0 | 71 | cmd_syscalls = $(CONFIG_SHELL) $< $(CC) $(c_flags) $(missing_syscalls_flags) |
| c53aeca0 | 72 | |
| 5f7efb4c | 73 | missing-syscalls: scripts/checksyscalls.sh $(offsets-file) FORCE |
| c53aeca0 | 74 | $(call cmd,syscalls) |
| 1cdf25d7 | 75 | |
| f197d75f KB |
76 | ##### |
| 77 | # 5) Generate constants for Python GDB integration | |
| 78 | # | |
| 79 | ||
| 80 | extra-$(CONFIG_GDB_SCRIPTS) += build_constants_py | |
| 81 | ||
| 82 | build_constants_py: $(obj)/$(timeconst-file) $(obj)/$(bounds-file) | |
| 83 | @$(MAKE) $(build)=scripts/gdb/linux $@ | |
| 84 | ||
| 0a227985 NMG |
85 | # Keep these three files during make clean |
| 86 | no-clean-files := $(bounds-file) $(offsets-file) $(timeconst-file) |