2021-05-26 19:09:36 +00:00
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# SPDX-License-Identifier: GPL-2.0
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# List of files in the vdso, has to be asm only for now
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obj-vdso64 = sigtramp.o gettimeofday.o datapage.o cacheflush.o note.o getcpu.o
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# Build rules
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2021-09-23 16:59:15 +00:00
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targets := $(obj-vdso64) vdso64.so vdso64.so.dbg
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2021-05-26 19:09:36 +00:00
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obj-vdso64 := $(addprefix $(obj)/, $(obj-vdso64))
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GCOV_PROFILE := n
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KCOV_INSTRUMENT := n
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UBSAN_SANITIZE := n
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ccflags-y := -shared -fno-common -fno-builtin -nostdlib \
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-Wl,-soname=linux-vdso64.so.1 -Wl,--hash-style=both
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asflags-y := -D__VDSO64__ -s
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2021-09-23 16:59:15 +00:00
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obj-y += vdso64_wrapper.o
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2021-05-26 19:09:36 +00:00
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targets += vdso64.lds
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CPPFLAGS_vdso64.lds += -P -C -U$(ARCH)
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2021-09-23 16:59:15 +00:00
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# Force dependency (incbin is bad)
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$(obj)/vdso64_wrapper.o : $(obj)/vdso64.so
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2021-05-26 19:09:36 +00:00
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2021-09-23 16:59:15 +00:00
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# link rule for the .so file, .lds has to be first
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$(obj)/vdso64.so.dbg: $(src)/vdso64.lds $(obj-vdso64) FORCE
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$(call if_changed,vdso64ld)
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2021-05-26 19:09:36 +00:00
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2021-09-23 16:59:15 +00:00
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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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2021-05-26 19:09:36 +00:00
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# actual build commands
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2021-09-23 16:59:15 +00:00
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quiet_cmd_vdso64ld = VDSO64L $@
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cmd_vdso64ld = $(CC) $(c_flags) -o $@ -Wl,-T$(filter %.lds,$^) $(filter %.o,$^)
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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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