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kbuild: rebuild modules when module linker scripts are updated

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Currently, the timestamp of module linker scripts are not checked.
Add them to the dependency of modules so they are correctly rebuilt.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
This commit is contained in:
Masahiro Yamada 2019-08-15 01:06:22 +09:00
parent 888f0c346f
commit 10df063855
10 changed files with 17 additions and 10 deletions
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5
Documentation/kbuild/makefiles.rst
View File

@ -993,6 +993,11 @@ When kbuild executes, the following steps are followed (roughly):
The linker script with full path. Assigned by the top-level Makefile.
KBUILD_LDS_MODULE
The module linker script with full path. Assigned by the top-level
Makefile and additionally by the arch Makefile.
KBUILD_VMLINUX_OBJS
All object files for vmlinux. They are linked to vmlinux in the same

3
Makefile
View File

@ -482,7 +482,8 @@ KBUILD_AFLAGS_KERNEL :=
KBUILD_CFLAGS_KERNEL :=
KBUILD_AFLAGS_MODULE := -DMODULE
KBUILD_CFLAGS_MODULE := -DMODULE
KBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds
KBUILD_LDFLAGS_MODULE :=
export KBUILD_LDS_MODULE := $(srctree)/scripts/module-common.lds
KBUILD_LDFLAGS :=
GCC_PLUGINS_CFLAGS :=
CLANG_FLAGS :=

2
arch/arm/Makefile
View File

@ -17,7 +17,7 @@ KBUILD_LDFLAGS_MODULE += --be8
endif
ifeq ($(CONFIG_ARM_MODULE_PLTS),y)
KBUILD_LDFLAGS_MODULE += -T $(srctree)/arch/arm/kernel/module.lds
KBUILD_LDS_MODULE += $(srctree)/arch/arm/kernel/module.lds
endif
GZFLAGS :=-9

2
arch/arm64/Makefile
View File

@ -101,7 +101,7 @@ endif
CHECKFLAGS += -D__aarch64__
ifeq ($(CONFIG_ARM64_MODULE_PLTS),y)
KBUILD_LDFLAGS_MODULE += -T $(srctree)/arch/arm64/kernel/module.lds
KBUILD_LDS_MODULE += $(srctree)/arch/arm64/kernel/module.lds
endif
# Default value

2
arch/ia64/Makefile
View File

@ -20,7 +20,7 @@ CHECKFLAGS += -D__ia64=1 -D__ia64__=1 -D_LP64 -D__LP64__
OBJCOPYFLAGS := --strip-all
LDFLAGS_vmlinux := -static
KBUILD_LDFLAGS_MODULE += -T $(srctree)/arch/ia64/module.lds
KBUILD_LDS_MODULE += $(srctree)/arch/ia64/module.lds
KBUILD_AFLAGS_KERNEL := -mconstant-gp
EXTRA :=

2
arch/m68k/Makefile
View File

@ -73,7 +73,7 @@ KBUILD_AFLAGS += -D__uClinux__
endif
KBUILD_LDFLAGS := -m m68kelf
KBUILD_LDFLAGS_MODULE += -T $(srctree)/arch/m68k/kernel/module.lds
KBUILD_LDS_MODULE += $(srctree)/arch/m68k/kernel/module.lds
ifdef CONFIG_SUN3
LDFLAGS_vmlinux = -N

2
arch/parisc/Makefile
View File

@ -60,7 +60,7 @@ KBUILD_CFLAGS += -DCC_USING_PATCHABLE_FUNCTION_ENTRY=1 \
-DFTRACE_PATCHABLE_FUNCTION_SIZE=$(NOP_COUNT)
CC_FLAGS_FTRACE := -fpatchable-function-entry=$(NOP_COUNT),$(shell echo $$(($(NOP_COUNT)-1)))
KBUILD_LDFLAGS_MODULE += -T $(srctree)/arch/parisc/kernel/module.lds
KBUILD_LDS_MODULE += $(srctree)/arch/parisc/kernel/module.lds
endif
OBJCOPY_FLAGS =-O binary -R .note -R .comment -S

2
arch/powerpc/Makefile
View File

@ -67,7 +67,7 @@ UTS_MACHINE := $(subst $(space),,$(machine-y))
ifdef CONFIG_PPC32
KBUILD_LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o
else
KBUILD_LDFLAGS_MODULE += -T $(srctree)/arch/powerpc/kernel/module.lds
KBUILD_LDS_MODULE += $(srctree)/arch/powerpc/kernel/module.lds
ifeq ($(call ld-ifversion, -ge, 225000000, y),y)
# Have the linker provide sfpr if possible.
# There is a corresponding test in arch/powerpc/lib/Makefile

2
arch/riscv/Makefile
View File

@ -52,7 +52,7 @@ ifeq ($(CONFIG_CMODEL_MEDANY),y)
KBUILD_CFLAGS += -mcmodel=medany
endif
ifeq ($(CONFIG_MODULE_SECTIONS),y)
KBUILD_LDFLAGS_MODULE += -T $(srctree)/arch/riscv/kernel/module.lds
KBUILD_LDS_MODULE += $(srctree)/arch/riscv/kernel/module.lds
endif
KBUILD_CFLAGS_MODULE += $(call cc-option,-mno-relax)

5
scripts/Makefile.modpost
View File

@ -126,10 +126,11 @@ quiet_cmd_ld_ko_o = LD [M] $@
cmd_ld_ko_o = \
$(LD) -r $(KBUILD_LDFLAGS) \
$(KBUILD_LDFLAGS_MODULE) $(LDFLAGS_MODULE) \
-o $@ $(real-prereqs) ; \
$(addprefix -T , $(KBUILD_LDS_MODULE)) \
-o $@ $(filter %.o, $^); \
$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true)
$(modules): %.ko :%.o %.mod.o FORCE
$(modules): %.ko :%.o %.mod.o $(KBUILD_LDS_MODULE) FORCE
+$(call if_changed,ld_ko_o)
targets += $(modules)