xref: /openbmc/linux/arch/s390/kernel/vdso32/Makefile (revision 7effbd18) 
1# SPDX-License-Identifier: GPL-2.0
2# List of files in the vdso
3
4KCOV_INSTRUMENT := n
5ARCH_REL_TYPE_ABS := R_390_COPY|R_390_GLOB_DAT|R_390_JMP_SLOT|R_390_RELATIVE
6ARCH_REL_TYPE_ABS += R_390_GOT|R_390_PLT
7
8include $(srctree)/lib/vdso/Makefile
9obj-vdso32 = vdso_user_wrapper-32.o note-32.o
10
11# Build rules
12
13targets := $(obj-vdso32) vdso32.so vdso32.so.dbg
14obj-vdso32 := $(addprefix $(obj)/, $(obj-vdso32))
15
16KBUILD_AFLAGS += -DBUILD_VDSO
17KBUILD_CFLAGS += -DBUILD_VDSO -DDISABLE_BRANCH_PROFILING
18
19KBUILD_AFLAGS_32 := $(filter-out -m64,$(KBUILD_AFLAGS))
20KBUILD_AFLAGS_32 += -m31 -s
21
22KBUILD_CFLAGS_32 := $(filter-out -m64,$(KBUILD_CFLAGS))
23KBUILD_CFLAGS_32 += -m31 -fPIC -shared -fno-common -fno-builtin
24
25LDFLAGS_vdso32.so.dbg += -fPIC -shared -soname=linux-vdso32.so.1 \
26	--hash-style=both --build-id=sha1 -melf_s390 -T
27
28$(targets:%=$(obj)/%.dbg): KBUILD_CFLAGS = $(KBUILD_CFLAGS_32)
29$(targets:%=$(obj)/%.dbg): KBUILD_AFLAGS = $(KBUILD_AFLAGS_32)
30
31obj-y += vdso32_wrapper.o
32targets += vdso32.lds
33CPPFLAGS_vdso32.lds += -P -C -U$(ARCH)
34
35# Disable gcov profiling, ubsan and kasan for VDSO code
36GCOV_PROFILE := n
37UBSAN_SANITIZE := n
38KASAN_SANITIZE := n
39KCSAN_SANITIZE := n
40
41# Force dependency (incbin is bad)
42$(obj)/vdso32_wrapper.o : $(obj)/vdso32.so
43
44$(obj)/vdso32.so.dbg: $(src)/vdso32.lds $(obj-vdso32) FORCE
45	$(call if_changed,ld)
46
47# strip rule for the .so file
48$(obj)/%.so: OBJCOPYFLAGS := -S
49$(obj)/%.so: $(obj)/%.so.dbg FORCE
50	$(call if_changed,objcopy)
51
52$(obj-vdso32): %-32.o: %.S FORCE
53	$(call if_changed_dep,vdso32as)
54
55# actual build commands
56quiet_cmd_vdso32as = VDSO32A $@
57      cmd_vdso32as = $(CC) $(a_flags) -c -o $@ $<
58quiet_cmd_vdso32cc = VDSO32C $@
59      cmd_vdso32cc = $(CC) $(c_flags) -c -o $@ $<
60
61# install commands for the unstripped file
62quiet_cmd_vdso_install = INSTALL $@
63      cmd_vdso_install = cp $(obj)/$@.dbg $(MODLIB)/vdso/$@
64
65vdso32.so: $(obj)/vdso32.so.dbg
66	@mkdir -p $(MODLIB)/vdso
67	$(call cmd,vdso_install)
68
69vdso_install: vdso32.so
70
71# Generate VDSO offsets using helper script
72gen-vdsosym := $(srctree)/$(src)/gen_vdso_offsets.sh
73quiet_cmd_vdsosym = VDSOSYM $@
74	cmd_vdsosym = $(NM) $< | $(gen-vdsosym) | LC_ALL=C sort > $@
75
76include/generated/vdso32-offsets.h: $(obj)/vdso32.so.dbg FORCE
77	$(call if_changed,vdsosym)
78