Browse Source

Kbuild updates for v5.9

- run the checker (e.g. sparse) after the compiler
 
  - remove unneeded cc-option tests for old compiler flags
 
  - fix tar-pkg to install dtbs
 
  - introduce ccflags-remove-y and asflags-remove-y syntax
 
  - allow to trace functions in sub-directories of lib/
 
  - introduce hostprogs-always-y and userprogs-always-y syntax
 
  - various Makefile cleanups
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Merge tag 'kbuild-v5.9' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild

Pull Kbuild updates from Masahiro Yamada:

 - run the checker (e.g. sparse) after the compiler

 - remove unneeded cc-option tests for old compiler flags

 - fix tar-pkg to install dtbs

 - introduce ccflags-remove-y and asflags-remove-y syntax

 - allow to trace functions in sub-directories of lib/

 - introduce hostprogs-always-y and userprogs-always-y syntax

 - various Makefile cleanups

* tag 'kbuild-v5.9' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild:
  kbuild: stop filtering out $(GCC_PLUGINS_CFLAGS) from cc-option base
  kbuild: include scripts/Makefile.* only when relevant CONFIG is enabled
  kbuild: introduce hostprogs-always-y and userprogs-always-y
  kbuild: sort hostprogs before passing it to ifneq
  kbuild: move host .so build rules to scripts/gcc-plugins/Makefile
  kbuild: Replace HTTP links with HTTPS ones
  kbuild: trace functions in subdirectories of lib/
  kbuild: introduce ccflags-remove-y and asflags-remove-y
  kbuild: do not export LDFLAGS_vmlinux
  kbuild: always create directories of targets
  powerpc/boot: add DTB to 'targets'
  kbuild: buildtar: add dtbs support
  kbuild: remove cc-option test of -ffreestanding
  kbuild: remove cc-option test of -fno-stack-protector
  Revert "kbuild: Create directory for target DTB"
  kbuild: run the checker after the compiler
master
Linus Torvalds 9 months ago
parent
commit
fc80c51fd4
65 changed files with 251 additions and 221 deletions
  1. +1
    -1
      Documentation/kbuild/Kconfig.recursion-issue-02
  2. +9
    -9
      Documentation/kbuild/kconfig-language.rst
  3. +1
    -1
      Documentation/kbuild/llvm.rst
  4. +44
    -1
      Documentation/kbuild/makefiles.rst
  5. +15
    -11
      Makefile
  6. +0
    -3
      arch/Kconfig
  7. +2
    -7
      arch/arm/boot/compressed/Makefile
  8. +1
    -2
      arch/mips/vdso/Makefile
  9. +2
    -0
      arch/powerpc/boot/Makefile
  10. +1
    -1
      arch/powerpc/kernel/Makefile
  11. +1
    -1
      arch/powerpc/platforms/powermac/Makefile
  12. +1
    -2
      arch/powerpc/xmon/Makefile
  13. +1
    -1
      arch/s390/Makefile
  14. +1
    -4
      arch/sh/boot/compressed/Makefile
  15. +2
    -2
      arch/sparc/vdso/Makefile
  16. +1
    -2
      arch/um/Makefile
  17. +2
    -2
      arch/x86/Makefile
  18. +2
    -2
      arch/x86/boot/compressed/Makefile
  19. +2
    -2
      arch/x86/entry/vdso/Makefile
  20. +1
    -2
      arch/x86/kernel/cpu/Makefile
  21. +1
    -1
      arch/x86/lib/Makefile
  22. +3
    -4
      arch/x86/mm/Makefile
  23. +1
    -2
      arch/x86/power/Makefile
  24. +1
    -1
      arch/x86/purgatory/Makefile
  25. +1
    -1
      arch/x86/um/vdso/Makefile
  26. +2
    -3
      arch/x86/xen/Makefile
  27. +1
    -1
      arch/xtensa/boot/boot-elf/Makefile
  28. +2
    -2
      drivers/firmware/efi/libstub/Makefile
  29. +1
    -2
      drivers/xen/Makefile
  30. +2
    -2
      kernel/trace/Makefile
  31. +3
    -6
      lib/Makefile
  32. +0
    -4
      lib/livepatch/Makefile
  33. +1
    -1
      mm/kasan/Makefile
  34. +1
    -2
      samples/auxdisplay/Makefile
  35. +1
    -2
      samples/binderfs/Makefile
  36. +1
    -2
      samples/connector/Makefile
  37. +1
    -2
      samples/hidraw/Makefile
  38. +1
    -3
      samples/mei/Makefile
  39. +1
    -3
      samples/pidfd/Makefile
  40. +1
    -3
      samples/seccomp/Makefile
  41. +1
    -2
      samples/timers/Makefile
  42. +1
    -2
      samples/uhid/Makefile
  43. +1
    -2
      samples/vfs/Makefile
  44. +1
    -2
      samples/watch_queue/Makefile
  45. +1
    -2
      samples/watchdog/Makefile
  46. +3
    -7
      scripts/Kbuild.include
  47. +8
    -10
      scripts/Makefile
  48. +8
    -7
      scripts/Makefile.build
  49. +9
    -4
      scripts/Makefile.clean
  50. +6
    -34
      scripts/Makefile.host
  51. +0
    -4
      scripts/Makefile.kcov
  52. +0
    -4
      scripts/Makefile.kcsan
  53. +20
    -8
      scripts/Makefile.lib
  54. +0
    -3
      scripts/Makefile.ubsan
  55. +1
    -2
      scripts/basic/Makefile
  56. +2
    -3
      scripts/dtc/Makefile
  57. +50
    -11
      scripts/gcc-plugins/Makefile
  58. +1
    -2
      scripts/genksyms/Makefile
  59. +4
    -0
      scripts/link-vmlinux.sh
  60. +2
    -2
      scripts/mod/Makefile
  61. +12
    -0
      scripts/package/buildtar
  62. +1
    -1
      scripts/package/mkdebian
  63. +1
    -1
      scripts/package/mkspec
  64. +1
    -3
      scripts/selinux/genheaders/Makefile
  65. +1
    -2
      scripts/selinux/mdp/Makefile

+ 1
- 1
Documentation/kbuild/Kconfig.recursion-issue-02 View File

@ -42,7 +42,7 @@
# "select FW_LOADER" [0], in the end the simple alternative solution to this
# problem consisted on matching semantics with newly introduced features.
#
# [0] http://lkml.kernel.org/r/1432241149-8762-1-git-send-email-mcgrof@do-not-panic.com
# [0] https://lkml.kernel.org/r/1432241149-8762-1-git-send-email-mcgrof@do-not-panic.com
mainmenu "Simple example to demo cumulative kconfig recursive dependency implication"


+ 9
- 9
Documentation/kbuild/kconfig-language.rst View File

@ -540,8 +540,8 @@ followed by a test macro::
If you need to expose a compiler capability to makefiles and/or C source files,
`CC_HAS_` is the recommended prefix for the config option::
config CC_HAS_STACKPROTECTOR_NONE
def_bool $(cc-option,-fno-stack-protector)
config CC_HAS_ASM_GOTO
def_bool $(success,$(srctree)/scripts/gcc-goto.sh $(CC))
Build as module only
~~~~~~~~~~~~~~~~~~~~
@ -688,10 +688,10 @@ and real world requirements were not well understood. As it stands though
only reverse engineering techniques have been used to deduce semantics from
variability modeling languages such as Kconfig [3]_.
.. [0] http://www.eng.uwaterloo.ca/~shshe/kconfig_semantics.pdf
.. [1] http://gsd.uwaterloo.ca/sites/default/files/vm-2013-berger.pdf
.. [2] http://gsd.uwaterloo.ca/sites/default/files/ase241-berger_0.pdf
.. [3] http://gsd.uwaterloo.ca/sites/default/files/icse2011.pdf
.. [0] https://www.eng.uwaterloo.ca/~shshe/kconfig_semantics.pdf
.. [1] https://gsd.uwaterloo.ca/sites/default/files/vm-2013-berger.pdf
.. [2] https://gsd.uwaterloo.ca/sites/default/files/ase241-berger_0.pdf
.. [3] https://gsd.uwaterloo.ca/sites/default/files/icse2011.pdf
Full SAT solver for Kconfig
~~~~~~~~~~~~~~~~~~~~~~~~~~~
@ -710,10 +710,10 @@ such efforts somehow on Kconfig. There is enough interest from mentors of
existing projects to not only help advise how to integrate this work upstream
but also help maintain it long term. Interested developers should visit:
http://kernelnewbies.org/KernelProjects/kconfig-sat
https://kernelnewbies.org/KernelProjects/kconfig-sat
.. [4] http://www.cs.cornell.edu/~sabhar/chapters/SATSolvers-KR-Handbook.pdf
.. [5] http://gsd.uwaterloo.ca/sites/default/files/vm-2013-berger.pdf
.. [4] https://www.cs.cornell.edu/~sabhar/chapters/SATSolvers-KR-Handbook.pdf
.. [5] https://gsd.uwaterloo.ca/sites/default/files/vm-2013-berger.pdf
.. [6] https://cados.cs.fau.de
.. [7] https://vamos.cs.fau.de
.. [8] https://undertaker.cs.fau.de


+ 1
- 1
Documentation/kbuild/llvm.rst View File

@ -76,7 +76,7 @@ Getting Help
Getting LLVM
-------------
- http://releases.llvm.org/download.html
- https://releases.llvm.org/download.html
- https://github.com/llvm/llvm-project
- https://llvm.org/docs/GettingStarted.html
- https://llvm.org/docs/CMake.html


+ 44
- 1
Documentation/kbuild/makefiles.rst View File

@ -368,6 +368,14 @@ more details, with real examples.
subdir-ccflags-y := -Werror
ccflags-remove-y, asflags-remove-y
These flags are used to remove particular flags for the compiler,
assembler invocations.
Example::
ccflags-remove-$(CONFIG_MCOUNT) += -pg
CFLAGS_$@, AFLAGS_$@
CFLAGS_$@ and AFLAGS_$@ only apply to commands in current
kbuild makefile.
@ -375,6 +383,9 @@ more details, with real examples.
$(CFLAGS_$@) specifies per-file options for $(CC). The $@
part has a literal value which specifies the file that it is for.
CFLAGS_$@ has the higher priority than ccflags-remove-y; CFLAGS_$@
can re-add compiler flags that were removed by ccflags-remove-y.
Example::
# drivers/scsi/Makefile
@ -387,6 +398,9 @@ more details, with real examples.
$(AFLAGS_$@) is a similar feature for source files in assembly
languages.
AFLAGS_$@ has the higher priority than asflags-remove-y; AFLAGS_$@
can re-add assembler flags that were removed by asflags-remove-y.
Example::
# arch/arm/kernel/Makefile
@ -735,6 +749,10 @@ Both possibilities are described in the following.
hostprogs := lxdialog
always-y := $(hostprogs)
Kbuild provides the following shorthand for this:
hostprogs-always-y := lxdialog
This will tell kbuild to build lxdialog even if not referenced in
any rule.
@ -817,7 +835,32 @@ The syntax is quite similar. The difference is to use "userprogs" instead of
5.4 When userspace programs are actually built
----------------------------------------------
Same as "When host programs are actually built".
Kbuild builds userspace programs only when told to do so.
There are two ways to do this.
(1) Add it as the prerequisite of another file
Example::
#net/bpfilter/Makefile
userprogs := bpfilter_umh
$(obj)/bpfilter_umh_blob.o: $(obj)/bpfilter_umh
$(obj)/bpfilter_umh is built before $(obj)/bpfilter_umh_blob.o
(2) Use always-y
Example::
userprogs := binderfs_example
always-y := $(userprogs)
Kbuild provides the following shorthand for this:
userprogs-always-y := binderfs_example
This will tell Kbuild to build binderfs_example when it visits this
Makefile.
6 Kbuild clean infrastructure
=============================


+ 15
- 11
Makefile View File

@ -508,7 +508,6 @@ KBUILD_CFLAGS_MODULE := -DMODULE
KBUILD_LDFLAGS_MODULE :=
export KBUILD_LDS_MODULE := $(srctree)/scripts/module-common.lds
KBUILD_LDFLAGS :=
GCC_PLUGINS_CFLAGS :=
CLANG_FLAGS :=
export ARCH SRCARCH CONFIG_SHELL BASH HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE LD CC
@ -747,9 +746,6 @@ endif
KBUILD_CFLAGS += $(call cc-option,--param=allow-store-data-races=0)
KBUILD_CFLAGS += $(call cc-option,-fno-allow-store-data-races)
include scripts/Makefile.kcov
include scripts/Makefile.gcc-plugins
ifdef CONFIG_READABLE_ASM
# Disable optimizations that make assembler listings hard to read.
# reorder blocks reorders the control in the function
@ -764,7 +760,7 @@ ifneq ($(CONFIG_FRAME_WARN),0)
KBUILD_CFLAGS += -Wframe-larger-than=$(CONFIG_FRAME_WARN)
endif
stackp-flags-$(CONFIG_CC_HAS_STACKPROTECTOR_NONE) := -fno-stack-protector
stackp-flags-y := -fno-stack-protector
stackp-flags-$(CONFIG_STACKPROTECTOR) := -fstack-protector
stackp-flags-$(CONFIG_STACKPROTECTOR_STRONG) := -fstack-protector-strong
@ -959,10 +955,19 @@ ifdef CONFIG_RETPOLINE
KBUILD_CFLAGS += $(call cc-option,-fcf-protection=none)
endif
include scripts/Makefile.kasan
include scripts/Makefile.extrawarn
include scripts/Makefile.ubsan
include scripts/Makefile.kcsan
# include additional Makefiles when needed
include-y := scripts/Makefile.extrawarn
include-$(CONFIG_KASAN) += scripts/Makefile.kasan
include-$(CONFIG_KCSAN) += scripts/Makefile.kcsan
include-$(CONFIG_UBSAN) += scripts/Makefile.ubsan
include-$(CONFIG_KCOV) += scripts/Makefile.kcov
include-$(CONFIG_GCC_PLUGINS) += scripts/Makefile.gcc-plugins
include $(addprefix $(srctree)/, $(include-y))
# scripts/Makefile.gcc-plugins is intentionally included last.
# Do not add $(call cc-option,...) below this line. When you build the kernel
# from the clean source tree, the GCC plugins do not exist at this point.
# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
KBUILD_CPPFLAGS += $(KCPPFLAGS)
@ -1120,7 +1125,6 @@ KBUILD_VMLINUX_OBJS += $(patsubst %/,%/built-in.a, $(drivers-y))
export KBUILD_VMLINUX_OBJS KBUILD_VMLINUX_LIBS
export KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds
export LDFLAGS_vmlinux
# used by scripts/Makefile.package
export KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) LICENSES arch include scripts tools)
@ -1152,7 +1156,7 @@ ARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink)
# Final link of vmlinux with optional arch pass after final link
cmd_link-vmlinux = \
$(CONFIG_SHELL) $< $(LD) $(KBUILD_LDFLAGS) $(LDFLAGS_vmlinux) ; \
$(CONFIG_SHELL) $< "$(LD)" "$(KBUILD_LDFLAGS)" "$(LDFLAGS_vmlinux)"; \
$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true)
vmlinux: scripts/link-vmlinux.sh autoksyms_recursive $(vmlinux-deps) FORCE


+ 0
- 3
arch/Kconfig View File

@ -481,9 +481,6 @@ config HAVE_STACKPROTECTOR
An arch should select this symbol if:
- it has implemented a stack canary (e.g. __stack_chk_guard)
config CC_HAS_STACKPROTECTOR_NONE
def_bool $(cc-option,-fno-stack-protector)
config STACKPROTECTOR
bool "Stack Protector buffer overflow detection"
depends on HAVE_STACKPROTECTOR


+ 2
- 7
arch/arm/boot/compressed/Makefile View File

@ -84,9 +84,8 @@ endif
# -fstack-protector-strong triggers protection checks in this code,
# but it is being used too early to link to meaningful stack_chk logic.
nossp-flags-$(CONFIG_CC_HAS_STACKPROTECTOR_NONE) := -fno-stack-protector
$(foreach o, $(libfdt_objs) atags_to_fdt.o, \
$(eval CFLAGS_$(o) := -I $(srctree)/scripts/dtc/libfdt $(nossp-flags-y)))
$(eval CFLAGS_$(o) := -I $(srctree)/scripts/dtc/libfdt -fno-stack-protector))
# These were previously generated C files. When you are building the kernel
# with O=, make sure to remove the stale files in the output tree. Otherwise,
@ -103,13 +102,9 @@ clean-files += piggy_data lib1funcs.S ashldi3.S bswapsdi2.S hyp-stub.S
KBUILD_CFLAGS += -DDISABLE_BRANCH_PROFILING
ifeq ($(CONFIG_FUNCTION_TRACER),y)
ORIG_CFLAGS := $(KBUILD_CFLAGS)
KBUILD_CFLAGS = $(subst -pg, , $(ORIG_CFLAGS))
endif
ccflags-y := -fpic $(call cc-option,-mno-single-pic-base,) -fno-builtin \
-I$(obj) $(DISABLE_ARM_SSP_PER_TASK_PLUGIN)
ccflags-remove-$(CONFIG_FUNCTION_TRACER) += -pg
asflags-y := -DZIMAGE
# Supply kernel BSS size to the decompressor via a linker symbol.


+ 1
- 2
arch/mips/vdso/Makefile View File

@ -35,8 +35,7 @@ cflags-vdso := $(ccflags-vdso) \
-O3 -g -fPIC -fno-strict-aliasing -fno-common -fno-builtin -G 0 \
-mrelax-pic-calls $(call cc-option, -mexplicit-relocs) \
-fno-stack-protector -fno-jump-tables -DDISABLE_BRANCH_PROFILING \
$(call cc-option, -fno-asynchronous-unwind-tables) \
$(call cc-option, -fno-stack-protector)
$(call cc-option, -fno-asynchronous-unwind-tables)
aflags-vdso := $(ccflags-vdso) \
-D__ASSEMBLY__ -Wa,-gdwarf-2


+ 2
- 0
arch/powerpc/boot/Makefile View File

@ -366,6 +366,8 @@ initrd-y := $(patsubst zImage%, zImage.initrd%, \
$(patsubst treeImage%, treeImage.initrd%, $(image-y)))))
initrd-y := $(filter-out $(image-y), $(initrd-y))
targets += $(image-y) $(initrd-y)
targets += $(foreach x, dtbImage uImage cuImage simpleImage treeImage, \
$(patsubst $(x).%, dts/%.dtb, $(filter $(x).%, $(image-y))))
$(addprefix $(obj)/, $(initrd-y)): $(obj)/ramdisk.image.gz


+ 1
- 1
arch/powerpc/kernel/Makefile View File

@ -16,7 +16,7 @@ CFLAGS_prom_init.o += $(DISABLE_LATENT_ENTROPY_PLUGIN)
CFLAGS_btext.o += $(DISABLE_LATENT_ENTROPY_PLUGIN)
CFLAGS_prom.o += $(DISABLE_LATENT_ENTROPY_PLUGIN)
CFLAGS_prom_init.o += $(call cc-option, -fno-stack-protector)
CFLAGS_prom_init.o += -fno-stack-protector
CFLAGS_prom_init.o += -DDISABLE_BRANCH_PROFILING
CFLAGS_prom_init.o += -ffreestanding


+ 1
- 1
arch/powerpc/platforms/powermac/Makefile View File

@ -1,6 +1,6 @@
# SPDX-License-Identifier: GPL-2.0
CFLAGS_bootx_init.o += -fPIC
CFLAGS_bootx_init.o += $(call cc-option, -fno-stack-protector)
CFLAGS_bootx_init.o += -fno-stack-protector
KASAN_SANITIZE_bootx_init.o := n


+ 1
- 2
arch/powerpc/xmon/Makefile View File

@ -7,8 +7,7 @@ UBSAN_SANITIZE := n
KASAN_SANITIZE := n
# Disable ftrace for the entire directory
ORIG_CFLAGS := $(KBUILD_CFLAGS)
KBUILD_CFLAGS = $(subst $(CC_FLAGS_FTRACE),,$(ORIG_CFLAGS))
ccflags-remove-$(CONFIG_FUNCTION_TRACER) += $(CC_FLAGS_FTRACE)
ifdef CONFIG_CC_IS_CLANG
# clang stores addresses on the stack causing the frame size to blow


+ 1
- 1
arch/s390/Makefile View File

@ -27,7 +27,7 @@ KBUILD_CFLAGS_DECOMPRESSOR := $(CLANG_FLAGS) -m64 -O2
KBUILD_CFLAGS_DECOMPRESSOR += -DDISABLE_BRANCH_PROFILING -D__NO_FORTIFY
KBUILD_CFLAGS_DECOMPRESSOR += -fno-delete-null-pointer-checks -msoft-float
KBUILD_CFLAGS_DECOMPRESSOR += -fno-asynchronous-unwind-tables
KBUILD_CFLAGS_DECOMPRESSOR += $(call cc-option,-ffreestanding)
KBUILD_CFLAGS_DECOMPRESSOR += -ffreestanding
KBUILD_CFLAGS_DECOMPRESSOR += $(call cc-disable-warning, address-of-packed-member)
KBUILD_CFLAGS_DECOMPRESSOR += $(if $(CONFIG_DEBUG_INFO),-g)
KBUILD_CFLAGS_DECOMPRESSOR += $(if $(CONFIG_DEBUG_INFO_DWARF4), $(call cc-option, -gdwarf-4,))


+ 1
- 4
arch/sh/boot/compressed/Makefile View File

@ -28,10 +28,7 @@ IMAGE_OFFSET := $(shell /bin/bash -c 'printf "0x%08x" \
$(CONFIG_BOOT_LINK_OFFSET)]')
endif
ifeq ($(CONFIG_MCOUNT),y)
ORIG_CFLAGS := $(KBUILD_CFLAGS)
KBUILD_CFLAGS = $(subst -pg, , $(ORIG_CFLAGS))
endif
ccflags-remove-$(CONFIG_MCOUNT) += -pg
LDFLAGS_vmlinux := --oformat $(ld-bfd) -Ttext $(IMAGE_OFFSET) -e startup \
-T $(obj)/../../kernel/vmlinux.lds


+ 2
- 2
arch/sparc/vdso/Makefile View File

@ -54,7 +54,7 @@ $(obj)/vdso-image-%.c: $(obj)/vdso%.so.dbg $(obj)/vdso%.so $(obj)/vdso2c FORCE
# optimize sibling calls.
#
CFL := $(PROFILING) -mcmodel=medlow -fPIC -O2 -fasynchronous-unwind-tables -m64 \
$(filter -g%,$(KBUILD_CFLAGS)) $(call cc-option, -fno-stack-protector) \
$(filter -g%,$(KBUILD_CFLAGS)) -fno-stack-protector \
-fno-omit-frame-pointer -foptimize-sibling-calls \
-DDISABLE_BRANCH_PROFILING -DBUILD_VDSO
@ -93,7 +93,7 @@ KBUILD_CFLAGS_32 := $(filter-out -fno-pic,$(KBUILD_CFLAGS_32))
KBUILD_CFLAGS_32 := $(filter-out $(GCC_PLUGINS_CFLAGS),$(KBUILD_CFLAGS_32))
KBUILD_CFLAGS_32 := $(filter-out $(SPARC_REG_CFLAGS),$(KBUILD_CFLAGS_32))
KBUILD_CFLAGS_32 += -m32 -msoft-float -fpic
KBUILD_CFLAGS_32 += $(call cc-option, -fno-stack-protector)
KBUILD_CFLAGS_32 += -fno-stack-protector
KBUILD_CFLAGS_32 += $(call cc-option, -foptimize-sibling-calls)
KBUILD_CFLAGS_32 += -fno-omit-frame-pointer
KBUILD_CFLAGS_32 += -DDISABLE_BRANCH_PROFILING


+ 1
- 2
arch/um/Makefile View File

@ -121,8 +121,7 @@ LINK-$(CONFIG_LD_SCRIPT_STATIC) += -static
LINK-$(CONFIG_LD_SCRIPT_DYN) += -Wl,-rpath,/lib $(call cc-option, -no-pie)
CFLAGS_NO_HARDENING := $(call cc-option, -fno-PIC,) $(call cc-option, -fno-pic,) \
$(call cc-option, -fno-stack-protector,) \
$(call cc-option, -fno-stack-protector-all,)
-fno-stack-protector $(call cc-option, -fno-stack-protector-all)
# Options used by linker script
export LDS_START := $(START)


+ 2
- 2
arch/x86/Makefile View File

@ -36,8 +36,8 @@ REALMODE_CFLAGS := $(M16_CFLAGS) -g -Os -DDISABLE_BRANCH_PROFILING \
-fno-strict-aliasing -fomit-frame-pointer -fno-pic \
-mno-mmx -mno-sse
REALMODE_CFLAGS += $(call __cc-option, $(CC), $(REALMODE_CFLAGS), -ffreestanding)
REALMODE_CFLAGS += $(call __cc-option, $(CC), $(REALMODE_CFLAGS), -fno-stack-protector)
REALMODE_CFLAGS += -ffreestanding
REALMODE_CFLAGS += -fno-stack-protector
REALMODE_CFLAGS += $(call __cc-option, $(CC), $(REALMODE_CFLAGS), -Wno-address-of-packed-member)
REALMODE_CFLAGS += $(call __cc-option, $(CC), $(REALMODE_CFLAGS), $(cc_stack_align4))
export REALMODE_CFLAGS


+ 2
- 2
arch/x86/boot/compressed/Makefile View File

@ -35,8 +35,8 @@ cflags-$(CONFIG_X86_32) := -march=i386
cflags-$(CONFIG_X86_64) := -mcmodel=small
KBUILD_CFLAGS += $(cflags-y)
KBUILD_CFLAGS += -mno-mmx -mno-sse
KBUILD_CFLAGS += $(call cc-option,-ffreestanding)
KBUILD_CFLAGS += $(call cc-option,-fno-stack-protector)
KBUILD_CFLAGS += -ffreestanding
KBUILD_CFLAGS += -fno-stack-protector
KBUILD_CFLAGS += $(call cc-disable-warning, address-of-packed-member)
KBUILD_CFLAGS += $(call cc-disable-warning, gnu)
KBUILD_CFLAGS += -Wno-pointer-sign


+ 2
- 2
arch/x86/entry/vdso/Makefile View File

@ -82,7 +82,7 @@ $(obj)/vdso-image-%.c: $(obj)/vdso%.so.dbg $(obj)/vdso%.so $(obj)/vdso2c FORCE
# optimize sibling calls.
#
CFL := $(PROFILING) -mcmodel=small -fPIC -O2 -fasynchronous-unwind-tables -m64 \
$(filter -g%,$(KBUILD_CFLAGS)) $(call cc-option, -fno-stack-protector) \
$(filter -g%,$(KBUILD_CFLAGS)) -fno-stack-protector \
-fno-omit-frame-pointer -foptimize-sibling-calls \
-DDISABLE_BRANCH_PROFILING -DBUILD_VDSO
@ -151,7 +151,7 @@ KBUILD_CFLAGS_32 := $(filter-out -mfentry,$(KBUILD_CFLAGS_32))
KBUILD_CFLAGS_32 := $(filter-out $(GCC_PLUGINS_CFLAGS),$(KBUILD_CFLAGS_32))
KBUILD_CFLAGS_32 := $(filter-out $(RETPOLINE_CFLAGS),$(KBUILD_CFLAGS_32))
KBUILD_CFLAGS_32 += -m32 -msoft-float -mregparm=0 -fpic
KBUILD_CFLAGS_32 += $(call cc-option, -fno-stack-protector)
KBUILD_CFLAGS_32 += -fno-stack-protector
KBUILD_CFLAGS_32 += $(call cc-option, -foptimize-sibling-calls)
KBUILD_CFLAGS_32 += -fno-omit-frame-pointer
KBUILD_CFLAGS_32 += -DDISABLE_BRANCH_PROFILING


+ 1
- 2
arch/x86/kernel/cpu/Makefile View File

@ -17,8 +17,7 @@ KCOV_INSTRUMENT_perf_event.o := n
KCSAN_SANITIZE_common.o := n
# Make sure load_percpu_segment has no stackprotector
nostackp := $(call cc-option, -fno-stack-protector)
CFLAGS_common.o := $(nostackp)
CFLAGS_common.o := -fno-stack-protector
obj-y := cacheinfo.o scattered.o topology.o
obj-y += common.o


+ 1
- 1
arch/x86/lib/Makefile View File

@ -24,7 +24,7 @@ ifdef CONFIG_FUNCTION_TRACER
CFLAGS_REMOVE_cmdline.o = -pg
endif
CFLAGS_cmdline.o := $(call cc-option, -fno-stack-protector)
CFLAGS_cmdline.o := -fno-stack-protector
endif
inat_tables_script = $(srctree)/arch/x86/tools/gen-insn-attr-x86.awk


+ 3
- 4
arch/x86/mm/Makefile View File

@ -22,10 +22,9 @@ obj-y := init.o init_$(BITS).o fault.o ioremap.o extable.o mmap.o \
obj-y += pat/
# Make sure __phys_addr has no stackprotector
nostackp := $(call cc-option, -fno-stack-protector)
CFLAGS_physaddr.o := $(nostackp)
CFLAGS_setup_nx.o := $(nostackp)
CFLAGS_mem_encrypt_identity.o := $(nostackp)
CFLAGS_physaddr.o := -fno-stack-protector
CFLAGS_setup_nx.o := -fno-stack-protector
CFLAGS_mem_encrypt_identity.o := -fno-stack-protector
CFLAGS_fault.o := -I $(srctree)/$(src)/../include/asm/trace


+ 1
- 2
arch/x86/power/Makefile View File

@ -3,8 +3,7 @@ OBJECT_FILES_NON_STANDARD_hibernate_asm_$(BITS).o := y
# __restore_processor_state() restores %gs after S3 resume and so should not
# itself be stack-protected
nostackp := $(call cc-option, -fno-stack-protector)
CFLAGS_cpu.o := $(nostackp)
CFLAGS_cpu.o := -fno-stack-protector
obj-$(CONFIG_PM_SLEEP) += cpu.o
obj-$(CONFIG_HIBERNATION) += hibernate_$(BITS).o hibernate_asm_$(BITS).o hibernate.o

+ 1
- 1
arch/x86/purgatory/Makefile View File

@ -34,7 +34,7 @@ KCOV_INSTRUMENT := n
PURGATORY_CFLAGS_REMOVE := -mcmodel=kernel
PURGATORY_CFLAGS := -mcmodel=large -ffreestanding -fno-zero-initialized-in-bss
PURGATORY_CFLAGS += $(DISABLE_STACKLEAK_PLUGIN) -DDISABLE_BRANCH_PROFILING
PURGATORY_CFLAGS += $(call cc-option,-fno-stack-protector)
PURGATORY_CFLAGS += -fno-stack-protector
# Default KBUILD_CFLAGS can have -pg option set when FTRACE is enabled. That
# in turn leaves some undefined symbols like __fentry__ in purgatory and not


+ 1
- 1
arch/x86/um/vdso/Makefile View File

@ -42,7 +42,7 @@ $(obj)/%.so: $(obj)/%.so.dbg FORCE
# optimize sibling calls.
#
CFL := $(PROFILING) -mcmodel=small -fPIC -O2 -fasynchronous-unwind-tables -m64 \
$(filter -g%,$(KBUILD_CFLAGS)) $(call cc-option, -fno-stack-protector) \
$(filter -g%,$(KBUILD_CFLAGS)) -fno-stack-protector \
-fno-omit-frame-pointer -foptimize-sibling-calls
$(vobjs): KBUILD_CFLAGS += $(CFL)


+ 2
- 3
arch/x86/xen/Makefile View File

@ -9,9 +9,8 @@ CFLAGS_REMOVE_irq.o = -pg
endif
# Make sure early boot has no stackprotector
nostackp := $(call cc-option, -fno-stack-protector)
CFLAGS_enlighten_pv.o := $(nostackp)
CFLAGS_mmu_pv.o := $(nostackp)
CFLAGS_enlighten_pv.o := -fno-stack-protector
CFLAGS_mmu_pv.o := -fno-stack-protector
obj-y += enlighten.o
obj-y += mmu.o


+ 1
- 1
arch/xtensa/boot/boot-elf/Makefile View File

@ -26,7 +26,7 @@ $(obj)/Image.o: $(obj)/../vmlinux.bin $(OBJS)
$(OBJS) $@
$(obj)/../Image.elf: $(obj)/Image.o $(obj)/boot.lds
$(Q)$(LD) $(KBUILD_LDFLAGS) $(LDFLAGS_vmlinux) \
$(Q)$(LD) $(KBUILD_LDFLAGS) \
-T $(obj)/boot.lds \
--build-id=none \
-o $@ $(obj)/Image.o


+ 2
- 2
drivers/firmware/efi/libstub/Makefile View File

@ -28,8 +28,8 @@ cflags-$(CONFIG_EFI_GENERIC_STUB) += -I$(srctree)/scripts/dtc/libfdt
KBUILD_CFLAGS := $(cflags-y) -Os -DDISABLE_BRANCH_PROFILING \
-include $(srctree)/drivers/firmware/efi/libstub/hidden.h \
-D__NO_FORTIFY \
$(call cc-option,-ffreestanding) \
$(call cc-option,-fno-stack-protector) \
-ffreestanding \
-fno-stack-protector \
$(call cc-option,-fno-addrsig) \
-D__DISABLE_EXPORTS


+ 1
- 2
drivers/xen/Makefile View File

@ -5,8 +5,7 @@ obj-y += mem-reservation.o
obj-y += events/
obj-y += xenbus/
nostackp := $(call cc-option, -fno-stack-protector)
CFLAGS_features.o := $(nostackp)
CFLAGS_features.o := -fno-stack-protector
dom0-$(CONFIG_ARM64) += arm-device.o
dom0-$(CONFIG_PCI) += pci.o


+ 2
- 2
kernel/trace/Makefile View File

@ -2,9 +2,9 @@
# Do not instrument the tracer itself:
ccflags-remove-$(CONFIG_FUNCTION_TRACER) += $(CC_FLAGS_FTRACE)
ifdef CONFIG_FUNCTION_TRACER
ORIG_CFLAGS := $(KBUILD_CFLAGS)
KBUILD_CFLAGS = $(subst $(CC_FLAGS_FTRACE),,$(ORIG_CFLAGS))
# Avoid recursion due to instrumentation.
KCSAN_SANITIZE := n


+ 3
- 6
lib/Makefile View File

@ -3,10 +3,7 @@
# Makefile for some libs needed in the kernel.
#
ifdef CONFIG_FUNCTION_TRACER
ORIG_CFLAGS := $(KBUILD_CFLAGS)
KBUILD_CFLAGS = $(subst $(CC_FLAGS_FTRACE),,$(ORIG_CFLAGS))
endif
ccflags-remove-$(CONFIG_FUNCTION_TRACER) += $(CC_FLAGS_FTRACE)
# These files are disabled because they produce lots of non-interesting and/or
# flaky coverage that is not a function of syscall inputs. For example,
@ -22,7 +19,7 @@ KCOV_INSTRUMENT_fault-inject.o := n
ifdef CONFIG_AMD_MEM_ENCRYPT
KASAN_SANITIZE_string.o := n
CFLAGS_string.o := $(call cc-option, -fno-stack-protector)
CFLAGS_string.o := -fno-stack-protector
endif
# Used by KCSAN while enabled, avoid recursion.
@ -324,7 +321,7 @@ endif
UBSAN_SANITIZE_ubsan.o := n
KASAN_SANITIZE_ubsan.o := n
KCSAN_SANITIZE_ubsan.o := n
CFLAGS_ubsan.o := $(call cc-option, -fno-stack-protector) $(DISABLE_STACKLEAK_PLUGIN)
CFLAGS_ubsan.o := -fno-stack-protector $(DISABLE_STACKLEAK_PLUGIN)
obj-$(CONFIG_SBITMAP) += sbitmap.o


+ 0
- 4
lib/livepatch/Makefile View File

@ -12,7 +12,3 @@ obj-$(CONFIG_TEST_LIVEPATCH) += test_klp_atomic_replace.o \
test_klp_state.o \
test_klp_state2.o \
test_klp_state3.o
# Target modules to be livepatched require CC_FLAGS_FTRACE
CFLAGS_test_klp_callbacks_busy.o += $(CC_FLAGS_FTRACE)
CFLAGS_test_klp_callbacks_mod.o += $(CC_FLAGS_FTRACE)

+ 1
- 1
mm/kasan/Makefile View File

@ -16,7 +16,7 @@ CFLAGS_REMOVE_tags_report.o = $(CC_FLAGS_FTRACE)
# Function splitter causes unnecessary splits in __asan_load1/__asan_store1
# see: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63533
CC_FLAGS_KASAN_RUNTIME := $(call cc-option, -fno-conserve-stack)
CC_FLAGS_KASAN_RUNTIME += $(call cc-option, -fno-stack-protector)
CC_FLAGS_KASAN_RUNTIME += -fno-stack-protector
# Disable branch tracing to avoid recursion.
CC_FLAGS_KASAN_RUNTIME += -DDISABLE_BRANCH_PROFILING


+ 1
- 2
samples/auxdisplay/Makefile View File

@ -1,3 +1,2 @@
# SPDX-License-Identifier: GPL-2.0
userprogs := cfag12864b-example
always-y := $(userprogs)
userprogs-always-y += cfag12864b-example

+ 1
- 2
samples/binderfs/Makefile View File

@ -1,5 +1,4 @@
# SPDX-License-Identifier: GPL-2.0-only
userprogs := binderfs_example
always-y := $(userprogs)
userprogs-always-y += binderfs_example
userccflags += -I usr/include

+ 1
- 2
samples/connector/Makefile View File

@ -1,7 +1,6 @@
# SPDX-License-Identifier: GPL-2.0
obj-$(CONFIG_SAMPLE_CONNECTOR) += cn_test.o
userprogs := ucon
always-$(CONFIG_CC_CAN_LINK) := $(userprogs)
userprogs-always-$(CONFIG_CC_CAN_LINK) += ucon
userccflags += -I usr/include

+ 1
- 2
samples/hidraw/Makefile View File

@ -1,5 +1,4 @@
# SPDX-License-Identifier: GPL-2.0
userprogs := hid-example
always-y := $(userprogs)
userprogs-always-y += hid-example
userccflags += -I usr/include

+ 1
- 3
samples/mei/Makefile View File

@ -1,7 +1,5 @@
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2012-2019, Intel Corporation. All rights reserved.
userprogs := mei-amt-version
always-y := $(userprogs)
userprogs-always-y += mei-amt-version
userccflags += -I usr/include

+ 1
- 3
samples/pidfd/Makefile View File

@ -1,6 +1,4 @@
# SPDX-License-Identifier: GPL-2.0
usertprogs := pidfd-metadata
always-y := $(userprogs)
usertprogs-always-y += pidfd-metadata
userccflags += -I usr/include

+ 1
- 3
samples/seccomp/Makefile View File

@ -1,8 +1,6 @@
# SPDX-License-Identifier: GPL-2.0
userprogs := bpf-fancy dropper bpf-direct user-trap
userprogs-always-y += bpf-fancy dropper bpf-direct user-trap
bpf-fancy-objs := bpf-fancy.o bpf-helper.o
userccflags += -I usr/include
always-y := $(userprogs)

+ 1
- 2
samples/timers/Makefile View File

@ -1,5 +1,4 @@
# SPDX-License-Identifier: GPL-2.0
userprogs := hpet_example
always-y := $(userprogs)
userprogs-always-y += hpet_example
userccflags += -I usr/include

+ 1
- 2
samples/uhid/Makefile View File

@ -1,5 +1,4 @@
# SPDX-License-Identifier: GPL-2.0-only
userprogs := uhid-example
always-y := $(userprogs)
userprogs-always-y += uhid-example
userccflags += -I usr/include

+ 1
- 2
samples/vfs/Makefile View File

@ -1,5 +1,4 @@
# SPDX-License-Identifier: GPL-2.0-only
userprogs := test-fsmount test-statx
always-y := $(userprogs)
userprogs-always-y += test-fsmount test-statx
userccflags += -I usr/include

+ 1
- 2
samples/watch_queue/Makefile View File

@ -1,5 +1,4 @@
# SPDX-License-Identifier: GPL-2.0-only
userprogs := watch_test
always-y := $(userprogs)
userprogs-always-y += watch_test
userccflags += -I usr/include

+ 1
- 2
samples/watchdog/Makefile View File

@ -1,3 +1,2 @@
# SPDX-License-Identifier: GPL-2.0
userprogs := watchdog-simple
always-y := $(userprogs)
userprogs-always-y += watchdog-simple

+ 3
- 7
scripts/Kbuild.include View File

@ -119,25 +119,21 @@ as-instr = $(call try-run,\
__cc-option = $(call try-run,\
$(1) -Werror $(2) $(3) -c -x c /dev/null -o "$$TMP",$(3),$(4))
# Do not attempt to build with gcc plugins during cc-option tests.
# (And this uses delayed resolution so the flags will be up to date.)
CC_OPTION_CFLAGS = $(filter-out $(GCC_PLUGINS_CFLAGS),$(KBUILD_CFLAGS))
# cc-option
# Usage: cflags-y += $(call cc-option,-march=winchip-c6,-march=i586)
cc-option = $(call __cc-option, $(CC),\
$(KBUILD_CPPFLAGS) $(CC_OPTION_CFLAGS),$(1),$(2))
$(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS),$(1),$(2))
# cc-option-yn
# Usage: flag := $(call cc-option-yn,-march=winchip-c6)
cc-option-yn = $(call try-run,\
$(CC) -Werror $(KBUILD_CPPFLAGS) $(CC_OPTION_CFLAGS) $(1) -c -x c /dev/null -o "$$TMP",y,n)
$(CC) -Werror $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS) $(1) -c -x c /dev/null -o "$$TMP",y,n)
# cc-disable-warning
# Usage: cflags-y += $(call cc-disable-warning,unused-but-set-variable)
cc-disable-warning = $(call try-run,\
$(CC) -Werror $(KBUILD_CPPFLAGS) $(CC_OPTION_CFLAGS) -W$(strip $(1)) -c -x c /dev/null -o "$$TMP",-Wno-$(strip $(1)))
$(CC) -Werror $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS) -W$(strip $(1)) -c -x c /dev/null -o "$$TMP",-Wno-$(strip $(1)))
# cc-ifversion
# Usage: EXTRA_CFLAGS += $(call cc-ifversion, -lt, 0402, -O1)


+ 8
- 10
scripts/Makefile View File

@ -3,14 +3,14 @@
# scripts contains sources for various helper programs used throughout
# the kernel for the build process.
always-$(CONFIG_BUILD_BIN2C) += bin2c
always-$(CONFIG_KALLSYMS) += kallsyms
always-$(BUILD_C_RECORDMCOUNT) += recordmcount
always-$(CONFIG_BUILDTIME_TABLE_SORT) += sorttable
always-$(CONFIG_ASN1) += asn1_compiler
always-$(CONFIG_MODULE_SIG_FORMAT) += sign-file
always-$(CONFIG_SYSTEM_TRUSTED_KEYRING) += extract-cert
always-$(CONFIG_SYSTEM_EXTRA_CERTIFICATE) += insert-sys-cert
hostprogs-always-$(CONFIG_BUILD_BIN2C) += bin2c
hostprogs-always-$(CONFIG_KALLSYMS) += kallsyms
hostprogs-always-$(BUILD_C_RECORDMCOUNT) += recordmcount
hostprogs-always-$(CONFIG_BUILDTIME_TABLE_SORT) += sorttable
hostprogs-always-$(CONFIG_ASN1) += asn1_compiler
hostprogs-always-$(CONFIG_MODULE_SIG_FORMAT) += sign-file
hostprogs-always-$(CONFIG_SYSTEM_TRUSTED_KEYRING) += extract-cert
hostprogs-always-$(CONFIG_SYSTEM_EXTRA_CERTIFICATE) += insert-sys-cert
HOSTCFLAGS_sorttable.o = -I$(srctree)/tools/include
HOSTCFLAGS_asn1_compiler.o = -I$(srctree)/include
@ -26,8 +26,6 @@ HOSTCFLAGS_sorttable.o += -DUNWINDER_ORC_ENABLED
HOSTLDLIBS_sorttable = -lpthread
endif
hostprogs := $(always-y) $(always-m)
# The following programs are only built on demand
hostprogs += unifdef


+ 8
- 7
scripts/Makefile.build View File

@ -45,12 +45,15 @@ include $(kbuild-file)
include scripts/Makefile.lib
# Do not include host rules unless needed
ifneq ($(hostprogs)$(hostcxxlibs-y)$(hostcxxlibs-m),)
# Do not include hostprogs rules unless needed.
# $(sort ...) is used here to remove duplicated words and excessive spaces.
hostprogs := $(sort $(hostprogs))
ifneq ($(hostprogs),)
include scripts/Makefile.host
endif
# Do not include userprogs rules unless needed.
# $(sort ...) is used here to remove duplicated words and excessive spaces.
userprogs := $(sort $(userprogs))
ifneq ($(userprogs),)
include scripts/Makefile.userprogs
@ -252,9 +255,9 @@ cmd_gen_ksymdeps = \
endif
define rule_cc_o_c
$(call cmd,checksrc)
$(call cmd_and_fixdep,cc_o_c)
$(call cmd,gen_ksymdeps)
$(call cmd,checksrc)
$(call cmd,checkdoc)
$(call cmd,objtool)
$(call cmd,modversions_c)
@ -277,8 +280,8 @@ endif
# Built-in and composite module parts
$(obj)/%.o: $(src)/%.c $(recordmcount_source) $(objtool_dep) FORCE
$(call cmd,force_checksrc)
$(call if_changed_rule,cc_o_c)
$(call cmd,force_checksrc)
cmd_mod = { \
echo $(if $($*-objs)$($*-y)$($*-m), $(addprefix $(obj)/, $($*-objs) $($*-y) $($*-m)), $(@:.mod=.o)); \
@ -515,15 +518,13 @@ existing-targets := $(wildcard $(sort $(targets)))
-include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd)
ifdef building_out_of_srctree
# Create directories for object files if they do not exist
obj-dirs := $(sort $(obj) $(patsubst %/,%, $(dir $(targets))))
obj-dirs := $(sort $(patsubst %/,%, $(dir $(targets))))
# If targets exist, their directories apparently exist. Skip mkdir.
existing-dirs := $(sort $(patsubst %/,%, $(dir $(existing-targets))))
obj-dirs := $(strip $(filter-out $(existing-dirs), $(obj-dirs)))
ifneq ($(obj-dirs),)
$(shell mkdir -p $(obj-dirs))
endif
endif
.PHONY: $(PHONY)

+ 9
- 4
scripts/Makefile.clean View File

@ -27,10 +27,15 @@ subdir-ymn := $(addprefix $(obj)/,$(subdir-ymn))
# build a list of files to remove, usually relative to the current
# directory
__clean-files := $(extra-y) $(extra-m) $(extra-) \
$(always) $(always-y) $(always-m) $(always-) $(targets) $(clean-files) \
$(hostprogs) $(hostprogs-y) $(hostprogs-m) $(hostprogs-) $(userprogs) \
$(hostcxxlibs-y) $(hostcxxlibs-m)
__clean-files := \
$(clean-files) $(targets) $(hostprogs) $(userprogs) \
$(extra-y) $(extra-m) $(extra-) \
$(always-y) $(always-m) $(always-) \
$(hostprogs-always-y) $(hostprogs-always-m) $(hostprogs-always-) \
$(userprogs-always-y) $(userprogs-always-m) $(userprogs-always-)
# deprecated
__clean-files += $(always) $(hostprogs-y) $(hostprogs-m) $(hostprogs-)
__clean-files := $(filter-out $(no-clean-files), $(__clean-files))


+ 6
- 34
scripts/Makefile.host View File

@ -38,39 +38,31 @@ $(obj)/%.tab.c $(obj)/%.tab.h: $(src)/%.y FORCE
# Will compile qconf as a C++ program, and menu as a C program.
# They are linked as C++ code to the executable qconf
__hostprogs := $(sort $(hostprogs))
host-cxxshlib := $(sort $(hostcxxlibs-y) $(hostcxxlibs-m))
# C code
# Executables compiled from a single .c file
host-csingle := $(foreach m,$(__hostprogs), \
host-csingle := $(foreach m,$(hostprogs), \
$(if $($(m)-objs)$($(m)-cxxobjs),,$(m)))
# C executables linked based on several .o files
host-cmulti := $(foreach m,$(__hostprogs),\
host-cmulti := $(foreach m,$(hostprogs),\
$(if $($(m)-cxxobjs),,$(if $($(m)-objs),$(m))))
# Object (.o) files compiled from .c files
host-cobjs := $(sort $(foreach m,$(__hostprogs),$($(m)-objs)))
host-cobjs := $(sort $(foreach m,$(hostprogs),$($(m)-objs)))
# C++ code
# C++ executables compiled from at least one .cc file
# and zero or more .c files
host-cxxmulti := $(foreach m,$(__hostprogs),$(if $($(m)-cxxobjs),$(m)))
host-cxxmulti := $(foreach m,$(hostprogs),$(if $($(m)-cxxobjs),$(m)))
# C++ Object (.o) files compiled from .cc files
host-cxxobjs := $(sort $(foreach m,$(host-cxxmulti),$($(m)-cxxobjs)))
# Object (.o) files used by the shared libaries
host-cxxshobjs := $(sort $(foreach m,$(host-cxxshlib),$($(m:.so=-objs))))
host-csingle := $(addprefix $(obj)/,$(host-csingle))
host-cmulti := $(addprefix $(obj)/,$(host-cmulti))
host-cobjs := $(addprefix $(obj)/,$(host-cobjs))
host-cxxmulti := $(addprefix $(obj)/,$(host-cxxmulti))
host-cxxobjs := $(addprefix $(obj)/,$(host-cxxobjs))
host-cxxshlib := $(addprefix $(obj)/,$(host-cxxshlib))
host-cxxshobjs := $(addprefix $(obj)/,$(host-cxxshobjs))
#####
# Handle options to gcc. Support building with separate output directory
@ -136,25 +128,5 @@ quiet_cmd_host-cxxobjs = HOSTCXX $@
$(host-cxxobjs): $(obj)/%.o: $(src)/%.cc FORCE
$(call if_changed_dep,host-cxxobjs)
# Compile .c file, create position independent .o file
# Note that plugin capable gcc versions can be either C or C++ based
# therefore plugin source files have to be compilable in both C and C++ mode.
# This is why a C++ compiler is invoked on a .c file.
# host-cxxshobjs -> .o
quiet_cmd_host-cxxshobjs = HOSTCXX -fPIC $@
cmd_host-cxxshobjs = $(HOSTCXX) $(hostcxx_flags) -fPIC -c -o $@ $<
$(host-cxxshobjs): $(obj)/%.o: $(src)/%.c FORCE
$(call if_changed_dep,host-cxxshobjs)
# Link a shared library, based on position independent .o files
# *.o -> .so shared library (host-cxxshlib)
quiet_cmd_host-cxxshlib = HOSTLLD -shared $@
cmd_host-cxxshlib = $(HOSTCXX) $(KBUILD_HOSTLDFLAGS) -shared -o $@ \
$(addprefix $(obj)/, $($(target-stem)-objs)) \
$(KBUILD_HOSTLDLIBS) $(HOSTLDLIBS_$(target-stem).so)
$(host-cxxshlib): FORCE
$(call if_changed,host-cxxshlib)
$(call multi_depend, $(host-cxxshlib), .so, -objs)
targets += $(host-csingle) $(host-cmulti) $(host-cobjs)\
$(host-cxxmulti) $(host-cxxobjs) $(host-cxxshlib) $(host-cxxshobjs)
targets += $(host-csingle) $(host-cmulti) $(host-cobjs) \
$(host-cxxmulti) $(host-cxxobjs)

+ 0
- 4
scripts/Makefile.kcov View File

@ -1,10 +1,6 @@
# SPDX-License-Identifier: GPL-2.0-only
ifdef CONFIG_KCOV
kcov-flags-$(CONFIG_CC_HAS_SANCOV_TRACE_PC) += -fsanitize-coverage=trace-pc
kcov-flags-$(CONFIG_KCOV_ENABLE_COMPARISONS) += -fsanitize-coverage=trace-cmp
kcov-flags-$(CONFIG_GCC_PLUGIN_SANCOV) += -fplugin=$(objtree)/scripts/gcc-plugins/sancov_plugin.so
export CFLAGS_KCOV := $(kcov-flags-y)
endif

+ 0
- 4
scripts/Makefile.kcsan View File

@ -1,6 +1,4 @@
# SPDX-License-Identifier: GPL-2.0
ifdef CONFIG_KCSAN
# GCC and Clang accept backend options differently. Do not wrap in cc-option,
# because Clang accepts "--param" even if it is unused.
ifdef CONFIG_CC_IS_CLANG
@ -15,5 +13,3 @@ CFLAGS_KCSAN := -fsanitize=thread \
$(call cc-option,$(call cc-param,tsan-instrument-func-entry-exit=0) -fno-optimize-sibling-calls) \
$(call cc-option,$(call cc-param,tsan-instrument-read-before-write=1)) \
$(call cc-param,tsan-distinguish-volatile=1)
endif # CONFIG_KCSAN

+ 20
- 8
scripts/Makefile.lib View File

@ -68,6 +68,17 @@ real-obj-m := $(foreach m, $(obj-m), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y))
always-y += $(always-m)
# hostprogs-always-y += foo
# ... is a shorthand for
# hostprogs += foo
# always-y += foo
hostprogs += $(hostprogs-always-y) $(hostprogs-always-m)
always-y += $(hostprogs-always-y) $(hostprogs-always-m)
# userprogs-always-y is likewise.
userprogs += $(userprogs-always-y) $(userprogs-always-m)
always-y += $(userprogs-always-y) $(userprogs-always-m)
# DTB
# If CONFIG_OF_ALL_DTBS is enabled, all DT blobs are built
extra-y += $(dtb-y)
@ -111,12 +122,14 @@ basename_flags = -DKBUILD_BASENAME=$(call name-fix,$(basetarget))
modname_flags = -DKBUILD_MODNAME=$(call name-fix,$(modname))
modfile_flags = -DKBUILD_MODFILE=$(call stringify,$(modfile))
orig_c_flags = $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS) \
$(ccflags-y) $(CFLAGS_$(target-stem).o)
_c_flags = $(filter-out $(CFLAGS_REMOVE_$(target-stem).o), $(orig_c_flags))
orig_a_flags = $(KBUILD_CPPFLAGS) $(KBUILD_AFLAGS) \
$(asflags-y) $(AFLAGS_$(target-stem).o)
_a_flags = $(filter-out $(AFLAGS_REMOVE_$(target-stem).o), $(orig_a_flags))
_c_flags = $(filter-out $(CFLAGS_REMOVE_$(target-stem).o), \
$(filter-out $(ccflags-remove-y), \
$(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS) $(ccflags-y)) \
$(CFLAGS_$(target-stem).o))
_a_flags = $(filter-out $(AFLAGS_REMOVE_$(target-stem).o), \
$(filter-out $(asflags-remove-y), \
$(KBUILD_CPPFLAGS) $(KBUILD_AFLAGS) $(asflags-y)) \
$(AFLAGS_$(target-stem).o))
_cpp_flags = $(KBUILD_CPPFLAGS) $(cppflags-y) $(CPPFLAGS_$(target-stem).lds)
#
@ -303,8 +316,7 @@ $(obj)/%.dtb.S: $(obj)/%.dtb FORCE
$(call if_changed,dt_S_dtb)
quiet_cmd_dtc = DTC $@
cmd_dtc = mkdir -p $(dir ${dtc-tmp}) ; \
$(HOSTCC) -E $(dtc_cpp_flags) -x assembler-with-cpp -o $(dtc-tmp) $< ; \
cmd_dtc = $(HOSTCC) -E $(dtc_cpp_flags) -x assembler-with-cpp -o $(dtc-tmp) $< ; \
$(DTC) -O $(patsubst .%,%,$(suffix $@)) -o $@ -b 0 \
$(addprefix -i,$(dir $<) $(DTC_INCLUDE)) $(DTC_FLAGS) \
-d $(depfile).dtc.tmp $(dtc-tmp) ; \


+ 0
- 3
scripts/Makefile.ubsan View File

@ -1,6 +1,4 @@
# SPDX-License-Identifier: GPL-2.0
ifdef CONFIG_UBSAN
ifdef CONFIG_UBSAN_ALIGNMENT
CFLAGS_UBSAN += $(call cc-option, -fsanitize=alignment)
endif
@ -26,4 +24,3 @@ endif
# -fsanitize=* options makes GCC less smart than usual and
# increase number of 'maybe-uninitialized false-positives
CFLAGS_UBSAN += $(call cc-option, -Wno-maybe-uninitialized)
endif

+ 1
- 2
scripts/basic/Makefile View File

@ -2,5 +2,4 @@
#
# fixdep: used to generate dependency information during build process
hostprogs := fixdep
always-y := $(hostprogs)
hostprogs-always-y += fixdep

+ 2
- 3
scripts/dtc/Makefile View File

@ -1,9 +1,8 @@
# SPDX-License-Identifier: GPL-2.0
# scripts/dtc makefile
hostprogs := dtc
always-$(CONFIG_DTC) += $(hostprogs)
always-$(CHECK_DT_BINDING) += $(hostprogs)
hostprogs-always-$(CONFIG_DTC) += dtc
hostprogs-always-$(CHECK_DT_BINDING) += dtc
dtc-objs := dtc.o flattree.o fstree.o data.o livetree.o treesource.o \
srcpos.o checks.o util.o


+ 50
- 11
scripts/gcc-plugins/Makefile View File

@ -1,22 +1,61 @@
# SPDX-License-Identifier: GPL-2.0
GCC_PLUGINS_DIR := $(shell $(CC) -print-file-name=plugin)
HOST_EXTRACXXFLAGS += -I$(GCC_PLUGINS_DIR)/include -I$(src) -std=gnu++98 -fno-rtti
HOST_EXTRACXXFLAGS += -fno-exceptions -fasynchronous-unwind-tables -ggdb
HOST_EXTRACXXFLAGS += -Wno-narrowing -Wno-unused-variable -Wno-c++11-compat
HOST_EXTRACXXFLAGS += -Wno-format-diag
$(obj)/randomize_layout_plugin.o: $(objtree)/$(obj)/randomize_layout_seed.h
$(obj)/randomize_layout_plugin.so: $(objtree)/$(obj)/randomize_layout_seed.h
quiet_cmd_create_randomize_layout_seed = GENSEED $@
cmd_create_randomize_layout_seed = \
$(CONFIG_SHELL) $(srctree)/$(src)/gen-random-seed.sh $@ $(objtree)/include/generated/randomize_layout_hash.h
$(objtree)/$(obj)/randomize_layout_seed.h: FORCE
$(call if_changed,create_randomize_layout_seed)
targets = randomize_layout_seed.h randomize_layout_hash.h
targets += randomize_layout_seed.h randomize_layout_hash.h
# Build rules for plugins
#
# No extra code is needed for single-file plugins.
# For multi-file plugins, use *-objs syntax to list the objects.
#
# If the plugin foo.so is compiled from foo.c and foo2.c, you can do:
#
# foo-objs := foo.o foo2.o
always-y += $(GCC_PLUGIN)
hostcxxlibs-y := $(GCC_PLUGIN)
always-y := $(hostcxxlibs-y)
GCC_PLUGINS_DIR = $(shell $(CC) -print-file-name=plugin)
$(foreach p,$(hostcxxlibs-y:%.so=%),$(eval $(p)-objs := $(p).o))
plugin_cxxflags = -Wp,-MMD,$(depfile) $(KBUILD_HOSTCXXFLAGS) -fPIC \
-I $(GCC_PLUGINS_DIR)/include -I $(obj) -std=gnu++98 \
-fno-rtti -fno-exceptions -fasynchronous-unwind-tables \
-ggdb -Wno-narrowing -Wno-unused-variable -Wno-c++11-compat \
-Wno-format-diag
plugin_ldflags = -shared
plugin-single := $(foreach m, $(GCC_PLUGIN), $(if $($(m:%.so=%-objs)),,$(m)))
plugin-multi := $(filter-out $(plugin-single), $(GCC_PLUGIN))
plugin-objs := $(sort $(foreach m, $(plugin-multi), $($(m:%.so=%-objs))))
targets += $(plugin-single) $(plugin-multi) $(plugin-objs)
clean-files += *.so
plugin-single := $(addprefix $(obj)/, $(plugin-single))
plugin-multi := $(addprefix $(obj)/, $(plugin-multi))
plugin-objs := $(addprefix $(obj)/, $(plugin-objs))
quiet_cmd_plugin_cxx_so_c = HOSTCXX $@
cmd_plugin_cxx_so_c = $(HOSTCXX) $(plugin_cxxflags) $(plugin_ldflags) -o $@ $<
$(plugin-single): $(obj)/%.so: $(src)/%.c FORCE
$(call if_changed_dep,plugin_cxx_so_c)
quiet_cmd_plugin_ld_so_o = HOSTLD $@
cmd_plugin_ld_so_o = $(HOSTCXX) $(plugin_ldflags) -o $@ \
$(addprefix $(obj)/, $($(target-stem)-objs))
$(plugin-multi): FORCE
$(call if_changed,plugin_ld_so_o)
$(foreach m, $(notdir $(plugin-multi)), $(eval $(obj)/$m: $(addprefix $(obj)/, $($(m:%.so=%-objs)))))
quiet_cmd_plugin_cxx_o_c = HOSTCXX $@
cmd_plugin_cxx_o_c = $(HOSTCXX) $(plugin_cxxflags) -c -o $@ $<
$(plugin-objs): $(obj)/%.o: $(src)/%.c FORCE
$(call if_changed_dep,plugin_cxx_o_c)

+ 1
- 2
scripts/genksyms/Makefile View File

@ -1,7 +1,6 @@
# SPDX-License-Identifier: GPL-2.0
hostprogs := genksyms
always-y := $(hostprogs)
hostprogs-always-y += genksyms
genksyms-objs := genksyms.o parse.tab.o lex.lex.o


+ 4
- 0
scripts/link-vmlinux.sh View File

@ -30,6 +30,10 @@
# Error out on error
set -e
LD="$1"
KBUILD_LDFLAGS="$2"
LDFLAGS_vmlinux="$3"
# Nice output in kbuild format
# Will be supressed by "make -s"
info()


+ 2
- 2
scripts/mod/Makefile View File

@ -1,8 +1,8 @@
# SPDX-License-Identifier: GPL-2.0
OBJECT_FILES_NON_STANDARD := y
hostprogs := modpost mk_elfconfig
always-y := $(hostprogs) empty.o
hostprogs-always-y += modpost mk_elfconfig
always-y += empty.o
modpost-objs := modpost.o file2alias.o sumversion.o


+ 12
- 0
scripts/package/buildtar View File

@ -53,6 +53,18 @@ rm -rf -- "${tmpdir}"
mkdir -p -- "${tmpdir}/boot"
dirs=boot
#
# Try to install dtbs
#
if grep -q '^CONFIG_OF_EARLY_FLATTREE=y' include/config/auto.conf; then
# Only some architectures with OF support have this target
if [ -d "${srctree}/arch/${SRCARCH}/boot/dts" ]; then
$MAKE ARCH="${ARCH}" -f ${srctree}/Makefile INSTALL_DTBS_PATH="${tmpdir}/boot/dtbs/${KERNELRELEASE}" dtbs_install
fi
fi
#
# Try to install modules
#


+ 1
- 1
scripts/package/mkdebian View File

@ -175,7 +175,7 @@ Section: kernel
Priority: optional
Maintainer: $maintainer
Build-Depends: bc, rsync, kmod, cpio, bison, flex | flex:native $extra_build_depends
Homepage: http://www.kernel.org/
Homepage: https://www.kernel.org/
Package: $packagename
Architecture: $debarch


+ 1
- 1
scripts/package/mkspec View File

@ -46,7 +46,7 @@ sed -e '/^DEL/d' -e 's/^\t*//' <<EOF
License: GPL
Group: System Environment/Kernel
Vendor: The Linux Community
URL: http://www.kernel.org
URL: https://www.kernel.org
$S Source: kernel-$__KERNELRELEASE.tar.gz
Provides: $PROVIDES
%define __spec_install_post /usr/lib/rpm/brp-compress || :


+ 1
- 3
scripts/selinux/genheaders/Makefile View File

@ -1,7 +1,5 @@
# SPDX-License-Identifier: GPL-2.0
hostprogs := genheaders
hostprogs-always-y += genheaders
HOST_EXTRACFLAGS += \
-I$(srctree)/include/uapi -I$(srctree)/include \
-I$(srctree)/security/selinux/include
always-y := $(hostprogs)

+ 1
- 2
scripts/selinux/mdp/Makefile View File

@ -1,8 +1,7 @@
# SPDX-License-Identifier: GPL-2.0
hostprogs := mdp
hostprogs-always-y += mdp
HOST_EXTRACFLAGS += \
-I$(srctree)/include/uapi -I$(srctree)/include \
-I$(srctree)/security/selinux/include -I$(objtree)/include
always-y := $(hostprogs)
clean-files := policy.* file_contexts

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