1
# List of files in the vdso, has to be asm only for now
3
obj-vdso64 = gettimeofday.o clock_getres.o clock_gettime.o note.o
7
targets := $(obj-vdso64) vdso64.so vdso64.so.dbg
8
obj-vdso64 := $(addprefix $(obj)/, $(obj-vdso64))
10
KBUILD_AFLAGS_64 := $(filter-out -m64,$(KBUILD_AFLAGS))
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KBUILD_AFLAGS_64 += -m64 -s
13
KBUILD_CFLAGS_64 := $(filter-out -m64,$(KBUILD_CFLAGS))
14
KBUILD_CFLAGS_64 += -m64 -fPIC -shared -fno-common -fno-builtin
15
KBUILD_CFLAGS_64 += -nostdlib -Wl,-soname=linux-vdso64.so.1 \
16
$(call cc-ldoption, -Wl$(comma)--hash-style=sysv)
18
$(targets:%=$(obj)/%.dbg): KBUILD_CFLAGS = $(KBUILD_CFLAGS_64)
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$(targets:%=$(obj)/%.dbg): KBUILD_AFLAGS = $(KBUILD_AFLAGS_64)
21
obj-y += vdso64_wrapper.o
23
CPPFLAGS_vdso64.lds += -P -C -U$(ARCH)
25
# Disable gcov profiling for VDSO code
28
# Force dependency (incbin is bad)
29
$(obj)/vdso64_wrapper.o : $(obj)/vdso64.so
31
# link rule for the .so file, .lds has to be first
32
$(obj)/vdso64.so.dbg: $(src)/vdso64.lds $(obj-vdso64)
33
$(call if_changed,vdso64ld)
35
# strip rule for the .so file
36
$(obj)/%.so: OBJCOPYFLAGS := -S
37
$(obj)/%.so: $(obj)/%.so.dbg FORCE
38
$(call if_changed,objcopy)
40
# assembly rules for the .S files
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$(obj-vdso64): %.o: %.S
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$(call if_changed_dep,vdso64as)
44
# actual build commands
45
quiet_cmd_vdso64ld = VDSO64L $@
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cmd_vdso64ld = $(CC) $(c_flags) -Wl,-T $^ -o $@
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quiet_cmd_vdso64as = VDSO64A $@
48
cmd_vdso64as = $(CC) $(a_flags) -c -o $@ $<
50
# install commands for the unstripped file
51
quiet_cmd_vdso_install = INSTALL $@
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cmd_vdso_install = cp $(obj)/$@.dbg $(MODLIB)/vdso/$@
54
vdso64.so: $(obj)/vdso64.so.dbg
55
@mkdir -p $(MODLIB)/vdso
56
$(call cmd,vdso_install)
58
vdso_install: vdso64.so