1# SPDX-License-Identifier: GPL-2.0
 2# List of files in the vdso
 3
 4KCOV_INSTRUMENT := n
 5
 6# Include the generic Makefile to check the built vdso.
 7include $(srctree)/lib/vdso/Makefile
 8obj-vdso32 = vdso_user_wrapper-32.o note-32.o
 9
10# Build rules
11
12targets := $(obj-vdso32) vdso32.so vdso32.so.dbg
13obj-vdso32 := $(addprefix $(obj)/, $(obj-vdso32))
14
15KBUILD_AFLAGS += -DBUILD_VDSO
16KBUILD_CFLAGS += -DBUILD_VDSO -DDISABLE_BRANCH_PROFILING
17
18KBUILD_AFLAGS_32 := $(filter-out -m64,$(KBUILD_AFLAGS))
19KBUILD_AFLAGS_32 += -m31 -s
20
21KBUILD_CFLAGS_32 := $(filter-out -m64,$(KBUILD_CFLAGS))
22KBUILD_CFLAGS_32 := $(filter-out -mno-pic-data-is-text-relative,$(KBUILD_CFLAGS_32))
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
44quiet_cmd_vdso_and_check = VDSO    $@
45      cmd_vdso_and_check = $(cmd_ld); $(cmd_vdso_check)
46
47$(obj)/vdso32.so.dbg: $(src)/vdso32.lds $(obj-vdso32) FORCE
48	$(call if_changed,vdso_and_check)
49
50# strip rule for the .so file
51$(obj)/%.so: OBJCOPYFLAGS := -S
52$(obj)/%.so: $(obj)/%.so.dbg FORCE
53	$(call if_changed,objcopy)
54
55$(obj-vdso32): %-32.o: %.S FORCE
 
56	$(call if_changed_dep,vdso32as)
57
58# actual build commands
 
 
59quiet_cmd_vdso32as = VDSO32A $@
60      cmd_vdso32as = $(CC) $(a_flags) -c -o $@ $<
61quiet_cmd_vdso32cc = VDSO32C $@
62      cmd_vdso32cc = $(CC) $(c_flags) -c -o $@ $<
63
64# Generate VDSO offsets using helper script
65gen-vdsosym := $(srctree)/$(src)/gen_vdso_offsets.sh
66quiet_cmd_vdsosym = VDSOSYM $@
67	cmd_vdsosym = $(NM) $< | $(gen-vdsosym) | LC_ALL=C sort > $@
 
 
 
68
69include/generated/vdso32-offsets.h: $(obj)/vdso32.so.dbg FORCE
70	$(call if_changed,vdsosym)

 1# List of files in the vdso, has to be asm only for now
 
 2
 3obj-vdso32 = gettimeofday.o clock_getres.o clock_gettime.o note.o getcpu.o
 
 
 
 
 4
 5# Build rules
 6
 7targets := $(obj-vdso32) vdso32.so vdso32.so.dbg
 8obj-vdso32 := $(addprefix $(obj)/, $(obj-vdso32))
 9
10KBUILD_AFLAGS_31 := $(filter-out -m64,$(KBUILD_AFLAGS))
11KBUILD_AFLAGS_31 += -m31 -s
 
 
 
12
13KBUILD_CFLAGS_31 := $(filter-out -m64,$(KBUILD_CFLAGS))
14KBUILD_CFLAGS_31 += -m31 -fPIC -shared -fno-common -fno-builtin
15KBUILD_CFLAGS_31 += -nostdlib -Wl,-soname=linux-vdso32.so.1 \
16			$(call cc-ldoption, -Wl$(comma)--hash-style=both)
17
18$(targets:%=$(obj)/%.dbg): KBUILD_CFLAGS = $(KBUILD_CFLAGS_31)
19$(targets:%=$(obj)/%.dbg): KBUILD_AFLAGS = $(KBUILD_AFLAGS_31)
 
 
 
20
21obj-y += vdso32_wrapper.o
22extra-y += vdso32.lds
23CPPFLAGS_vdso32.lds += -P -C -U$(ARCH)
24
25# Disable gcov profiling for VDSO code
26GCOV_PROFILE := n
 
 
 
27
28# Force dependency (incbin is bad)
29$(obj)/vdso32_wrapper.o : $(obj)/vdso32.so
30
31# link rule for the .so file, .lds has to be first
32$(obj)/vdso32.so.dbg: $(src)/vdso32.lds $(obj-vdso32)
33	$(call if_changed,vdso32ld)
 
 
34
35# strip rule for the .so file
36$(obj)/%.so: OBJCOPYFLAGS := -S
37$(obj)/%.so: $(obj)/%.so.dbg FORCE
38	$(call if_changed,objcopy)
39
40# assembly rules for the .S files
41$(obj-vdso32): %.o: %.S
42	$(call if_changed_dep,vdso32as)
43
44# actual build commands
45quiet_cmd_vdso32ld = VDSO32L $@
46      cmd_vdso32ld = $(CC) $(c_flags) -Wl,-T $^ -o $@
47quiet_cmd_vdso32as = VDSO32A $@
48      cmd_vdso32as = $(CC) $(a_flags) -c -o $@ $<
 
 
49
50# install commands for the unstripped file
51quiet_cmd_vdso_install = INSTALL $@
52      cmd_vdso_install = cp $(obj)/$@.dbg $(MODLIB)/vdso/$@
53
54vdso32.so: $(obj)/vdso32.so.dbg
55	@mkdir -p $(MODLIB)/vdso
56	$(call cmd,vdso_install)
57
58vdso_install: vdso32.so