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
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=sysv)
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
59