1# SPDX-License-Identifier: GPL-2.0
2# List of files in the vdso, has to be asm only for now
3
4obj-vdso64 = sigtramp.o gettimeofday.o datapage.o cacheflush.o note.o getcpu.o
5
6# Build rules
7
8targets := $(obj-vdso64) vdso64.so vdso64.so.dbg
9obj-vdso64 := $(addprefix $(obj)/, $(obj-vdso64))
10
11GCOV_PROFILE := n
12KCOV_INSTRUMENT := n
13UBSAN_SANITIZE := n
14
15ccflags-y := -shared -fno-common -fno-builtin -nostdlib \
16	-Wl,-soname=linux-vdso64.so.1 -Wl,--hash-style=both
17asflags-y := -D__VDSO64__ -s
18
19obj-y += vdso64_wrapper.o
20targets += vdso64.lds
21CPPFLAGS_vdso64.lds += -P -C -U$(ARCH)
22
23# Force dependency (incbin is bad)
24$(obj)/vdso64_wrapper.o : $(obj)/vdso64.so
25
26# link rule for the .so file, .lds has to be first
27$(obj)/vdso64.so.dbg: $(src)/vdso64.lds $(obj-vdso64) FORCE
28	$(call if_changed,vdso64ld)
29
30# strip rule for the .so file
31$(obj)/%.so: OBJCOPYFLAGS := -S
32$(obj)/%.so: $(obj)/%.so.dbg FORCE
33	$(call if_changed,objcopy)
34
35# actual build commands
36quiet_cmd_vdso64ld = VDSO64L $@
37      cmd_vdso64ld = $(CC) $(c_flags) -o $@ -Wl,-T$(filter %.lds,$^) $(filter %.o,$^)
38
39# install commands for the unstripped file
40quiet_cmd_vdso_install = INSTALL $@
41      cmd_vdso_install = cp $(obj)/$@.dbg $(MODLIB)/vdso/$@
42
43vdso64.so: $(obj)/vdso64.so.dbg
44	@mkdir -p $(MODLIB)/vdso
45	$(call cmd,vdso_install)
46
47vdso_install: vdso64.so
48