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2636487a47
[ Upstream commit b44b136a37 ]
According to Documentation/kbuild/makefiles.txt all build targets using
if_changed should use FORCE as well. Add missing FORCE to make sure
vdso targets are rebuild properly when not just immediate prerequisites
have changed but also when build command differs.
Reviewed-by: Philipp Rudo <prudo@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
62 lines
1.8 KiB
Makefile
62 lines
1.8 KiB
Makefile
# List of files in the vdso, has to be asm only for now
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KCOV_INSTRUMENT := n
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obj-vdso64 = gettimeofday.o clock_getres.o clock_gettime.o note.o getcpu.o
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# Build rules
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targets := $(obj-vdso64) vdso64.so vdso64.so.dbg
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obj-vdso64 := $(addprefix $(obj)/, $(obj-vdso64))
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KBUILD_AFLAGS_64 := $(filter-out -m64,$(KBUILD_AFLAGS))
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KBUILD_AFLAGS_64 += -m64 -s
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KBUILD_CFLAGS_64 := $(filter-out -m64,$(KBUILD_CFLAGS))
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KBUILD_CFLAGS_64 += -m64 -fPIC -shared -fno-common -fno-builtin
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KBUILD_CFLAGS_64 += -nostdlib -Wl,-soname=linux-vdso64.so.1 \
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$(call cc-ldoption, -Wl$(comma)--hash-style=both)
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$(targets:%=$(obj)/%.dbg): KBUILD_CFLAGS = $(KBUILD_CFLAGS_64)
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$(targets:%=$(obj)/%.dbg): KBUILD_AFLAGS = $(KBUILD_AFLAGS_64)
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obj-y += vdso64_wrapper.o
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extra-y += vdso64.lds
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CPPFLAGS_vdso64.lds += -P -C -U$(ARCH)
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# Disable gcov profiling and ubsan for VDSO code
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GCOV_PROFILE := n
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UBSAN_SANITIZE := n
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# Force dependency (incbin is bad)
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$(obj)/vdso64_wrapper.o : $(obj)/vdso64.so
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# link rule for the .so file, .lds has to be first
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$(obj)/vdso64.so.dbg: $(src)/vdso64.lds $(obj-vdso64) FORCE
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$(call if_changed,vdso64ld)
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# strip rule for the .so file
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$(obj)/%.so: OBJCOPYFLAGS := -S
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$(obj)/%.so: $(obj)/%.so.dbg FORCE
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$(call if_changed,objcopy)
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# assembly rules for the .S files
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$(obj-vdso64): %.o: %.S FORCE
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$(call if_changed_dep,vdso64as)
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# actual build commands
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quiet_cmd_vdso64ld = VDSO64L $@
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cmd_vdso64ld = $(CC) $(c_flags) -Wl,-T $(filter %.lds %.o,$^) -o $@
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quiet_cmd_vdso64as = VDSO64A $@
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cmd_vdso64as = $(CC) $(a_flags) -c -o $@ $<
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# install commands for the unstripped file
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quiet_cmd_vdso_install = INSTALL $@
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cmd_vdso_install = cp $(obj)/$@.dbg $(MODLIB)/vdso/$@
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vdso64.so: $(obj)/vdso64.so.dbg
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@mkdir -p $(MODLIB)/vdso
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$(call cmd,vdso_install)
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vdso_install: vdso64.so
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