1 # SPDX-License-Identifier: GPL-2.0
2 # List of files in the vdso
3
4 # Include the generic Makefile to check the bu
5 include $(srctree)/lib/vdso/Makefile
6 obj-vdso32 = vdso_user_wrapper-32.o note-32.o
7
8 # Build rules
9
10 targets := $(obj-vdso32) vdso32.so vdso32.so.d
11 obj-vdso32 := $(addprefix $(obj)/, $(obj-vdso3
12
13 KBUILD_AFLAGS += -DBUILD_VDSO
14 KBUILD_CFLAGS += -DBUILD_VDSO -DDISABLE_BRANCH
15
16 KBUILD_AFLAGS_32 := $(filter-out -m64,$(KBUILD
17 KBUILD_AFLAGS_32 += -m31 -s
18
19 KBUILD_CFLAGS_32 := $(filter-out -m64,$(KBUILD
20 KBUILD_CFLAGS_32 := $(filter-out -mpacked-stac
21 KBUILD_CFLAGS_32 := $(filter-out -mno-pic-data
22 KBUILD_CFLAGS_32 := $(filter-out -fno-asynchro
23 KBUILD_CFLAGS_32 += -m31 -fPIC -shared -fno-co
24
25 LDFLAGS_vdso32.so.dbg += -shared -soname=linux
26 --hash-style=both --build-id=sha1 -mel
27
28 $(targets:%=$(obj)/%.dbg): KBUILD_CFLAGS = $(K
29 $(targets:%=$(obj)/%.dbg): KBUILD_AFLAGS = $(K
30
31 obj-y += vdso32_wrapper.o
32 targets += vdso32.lds
33 CPPFLAGS_vdso32.lds += -P -C -U$(ARCH)
34
35 # Force dependency (incbin is bad)
36 $(obj)/vdso32_wrapper.o : $(obj)/vdso32.so
37
38 quiet_cmd_vdso_and_check = VDSO $@
39 cmd_vdso_and_check = $(cmd_ld); $(cmd_vd
40
41 $(obj)/vdso32.so.dbg: $(obj)/vdso32.lds $(obj-
42 $(call if_changed,vdso_and_check)
43
44 # strip rule for the .so file
45 $(obj)/%.so: OBJCOPYFLAGS := -S
46 $(obj)/%.so: $(obj)/%.so.dbg FORCE
47 $(call if_changed,objcopy)
48
49 $(obj-vdso32): %-32.o: %.S FORCE
50 $(call if_changed_dep,vdso32as)
51
52 # actual build commands
53 quiet_cmd_vdso32as = VDSO32A $@
54 cmd_vdso32as = $(CC) $(a_flags) -c -o $@
55 quiet_cmd_vdso32cc = VDSO32C $@
56 cmd_vdso32cc = $(CC) $(c_flags) -c -o $@
57
58 # Generate VDSO offsets using helper script
59 gen-vdsosym := $(src)/gen_vdso_offsets.sh
60 quiet_cmd_vdsosym = VDSOSYM $@
61 cmd_vdsosym = $(NM) $< | $(gen-vdsosym
62
63 include/generated/vdso32-offsets.h: $(obj)/vds
64 $(call if_changed,vdsosym)
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