1 # SPDX-License-Identifier: GPL-2.0
2 # List of files in the vdso
5 ARCH_REL_TYPE_ABS := R_390_COPY|R_390_GLOB_DAT|R_390_JMP_SLOT|R_390_RELATIVE
6 ARCH_REL_TYPE_ABS += R_390_GOT|R_390_PLT
8 include $(srctree)/lib/vdso/Makefile
9 obj-vdso64 = vdso_user_wrapper.o note.o getcpu.o
10 obj-cvdso64 = vdso64_generic.o
11 CFLAGS_REMOVE_vdso64_generic.o = -pg $(CC_FLAGS_FTRACE) $(CC_FLAGS_EXPOLINE)
15 targets := $(obj-vdso64) $(obj-cvdso64) vdso64.so vdso64.so.dbg
16 obj-vdso64 := $(addprefix $(obj)/, $(obj-vdso64))
17 obj-cvdso64 := $(addprefix $(obj)/, $(obj-cvdso64))
19 KBUILD_AFLAGS += -DBUILD_VDSO
20 KBUILD_CFLAGS += -DBUILD_VDSO -DDISABLE_BRANCH_PROFILING
22 KBUILD_AFLAGS_64 := $(filter-out -m64,$(KBUILD_AFLAGS))
23 KBUILD_AFLAGS_64 += -m64 -s
25 KBUILD_CFLAGS_64 := $(filter-out -m64,$(KBUILD_CFLAGS))
26 KBUILD_CFLAGS_64 += -m64 -fPIC -shared -fno-common -fno-builtin
27 ldflags-y := -fPIC -shared -nostdlib -soname=linux-vdso64.so.1 \
28 --hash-style=both --build-id=sha1 -T
30 $(targets:%=$(obj)/%.dbg): KBUILD_CFLAGS = $(KBUILD_CFLAGS_64)
31 $(targets:%=$(obj)/%.dbg): KBUILD_AFLAGS = $(KBUILD_AFLAGS_64)
33 obj-y += vdso64_wrapper.o
35 CPPFLAGS_vdso64.lds += -P -C -U$(ARCH)
37 # Disable gcov profiling, ubsan and kasan for VDSO code
42 # Force dependency (incbin is bad)
43 $(obj)/vdso64_wrapper.o : $(obj)/vdso64.so
45 # link rule for the .so file, .lds has to be first
46 $(obj)/vdso64.so.dbg: $(src)/vdso64.lds $(obj-vdso64) $(obj-cvdso64) FORCE
49 # strip rule for the .so file
50 $(obj)/%.so: OBJCOPYFLAGS := -S
51 $(obj)/%.so: $(obj)/%.so.dbg FORCE
52 $(call if_changed,objcopy)
54 # assembly rules for the .S files
55 $(obj-vdso64): %.o: %.S FORCE
56 $(call if_changed_dep,vdso64as)
58 $(obj-cvdso64): %.o: %.c FORCE
59 $(call if_changed_dep,vdso64cc)
61 # actual build commands
62 quiet_cmd_vdso64as = VDSO64A $@
63 cmd_vdso64as = $(CC) $(a_flags) -c -o $@ $<
64 quiet_cmd_vdso64cc = VDSO64C $@
65 cmd_vdso64cc = $(CC) $(c_flags) -c -o $@ $<
67 # install commands for the unstripped file
68 quiet_cmd_vdso_install = INSTALL $@
69 cmd_vdso_install = cp $(obj)/$@.dbg $(MODLIB)/vdso/$@
71 vdso64.so: $(obj)/vdso64.so.dbg
72 @mkdir -p $(MODLIB)/vdso
73 $(call cmd,vdso_install)
75 vdso_install: vdso64.so