1# SPDX-License-Identifier: GPL-2.0
 2# List of files in the vdso, has to be asm only for now
 3
 4KCOV_INSTRUMENT := n
 5
 6obj-vdso64 = gettimeofday.o clock_getres.o clock_gettime.o note.o getcpu.o
 7
 8# Build rules
 9
10targets := $(obj-vdso64) vdso64.so vdso64.so.dbg
11obj-vdso64 := $(addprefix $(obj)/, $(obj-vdso64))
12
13KBUILD_AFLAGS += -DBUILD_VDSO
14KBUILD_CFLAGS += -DBUILD_VDSO
15
16KBUILD_AFLAGS_64 := $(filter-out -m64,$(KBUILD_AFLAGS))
17KBUILD_AFLAGS_64 += -m64 -s
18
19KBUILD_CFLAGS_64 := $(filter-out -m64,$(KBUILD_CFLAGS))
20KBUILD_CFLAGS_64 += -m64 -fPIC -shared -fno-common -fno-builtin
21KBUILD_CFLAGS_64 += -nostdlib -Wl,-soname=linux-vdso64.so.1 \
22		    -Wl,--hash-style=both
23
24$(targets:%=$(obj)/%.dbg): KBUILD_CFLAGS = $(KBUILD_CFLAGS_64)
25$(targets:%=$(obj)/%.dbg): KBUILD_AFLAGS = $(KBUILD_AFLAGS_64)
26
27obj-y += vdso64_wrapper.o
28extra-y += vdso64.lds
29CPPFLAGS_vdso64.lds += -P -C -U$(ARCH)
30
31# Disable gcov profiling, ubsan and kasan for VDSO code
32GCOV_PROFILE := n
33UBSAN_SANITIZE := n
34KASAN_SANITIZE := n
35
36# Force dependency (incbin is bad)
37$(obj)/vdso64_wrapper.o : $(obj)/vdso64.so
38
39# link rule for the .so file, .lds has to be first
40$(obj)/vdso64.so.dbg: $(src)/vdso64.lds $(obj-vdso64) FORCE
41	$(call if_changed,vdso64ld)
42
43# strip rule for the .so file
44$(obj)/%.so: OBJCOPYFLAGS := -S
45$(obj)/%.so: $(obj)/%.so.dbg FORCE
46	$(call if_changed,objcopy)
47
48# assembly rules for the .S files
49$(obj-vdso64): %.o: %.S FORCE
50	$(call if_changed_dep,vdso64as)
51
52# actual build commands
53quiet_cmd_vdso64ld = VDSO64L $@
54      cmd_vdso64ld = $(CC) $(c_flags) -Wl,-T $(filter %.lds %.o,$^) -o $@
55quiet_cmd_vdso64as = VDSO64A $@
56      cmd_vdso64as = $(CC) $(a_flags) -c -o $@ $<
57
58# install commands for the unstripped file
59quiet_cmd_vdso_install = INSTALL $@
60      cmd_vdso_install = cp $(obj)/$@.dbg $(MODLIB)/vdso/$@
61
62vdso64.so: $(obj)/vdso64.so.dbg
63	@mkdir -p $(MODLIB)/vdso
64	$(call cmd,vdso_install)
65
66vdso_install: vdso64.so

 
 1# List of files in the vdso, has to be asm only for now
 2
 3obj-vdso64 = gettimeofday.o clock_getres.o clock_gettime.o note.o
 
 
 4
 5# Build rules
 6
 7targets := $(obj-vdso64) vdso64.so vdso64.so.dbg
 8obj-vdso64 := $(addprefix $(obj)/, $(obj-vdso64))
 9
 
 
 
10KBUILD_AFLAGS_64 := $(filter-out -m64,$(KBUILD_AFLAGS))
11KBUILD_AFLAGS_64 += -m64 -s
12
13KBUILD_CFLAGS_64 := $(filter-out -m64,$(KBUILD_CFLAGS))
14KBUILD_CFLAGS_64 += -m64 -fPIC -shared -fno-common -fno-builtin
15KBUILD_CFLAGS_64 += -nostdlib -Wl,-soname=linux-vdso64.so.1 \
16			$(call cc-ldoption, -Wl$(comma)--hash-style=sysv)
17
18$(targets:%=$(obj)/%.dbg): KBUILD_CFLAGS = $(KBUILD_CFLAGS_64)
19$(targets:%=$(obj)/%.dbg): KBUILD_AFLAGS = $(KBUILD_AFLAGS_64)
20
21obj-y += vdso64_wrapper.o
22extra-y += vdso64.lds
23CPPFLAGS_vdso64.lds += -P -C -U$(ARCH)
24
25# Disable gcov profiling for VDSO code
26GCOV_PROFILE := n
 
 
27
28# Force dependency (incbin is bad)
29$(obj)/vdso64_wrapper.o : $(obj)/vdso64.so
30
31# link rule for the .so file, .lds has to be first
32$(obj)/vdso64.so.dbg: $(src)/vdso64.lds $(obj-vdso64)
33	$(call if_changed,vdso64ld)
34
35# strip rule for the .so file
36$(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-vdso64): %.o: %.S
42	$(call if_changed_dep,vdso64as)
43
44# actual build commands
45quiet_cmd_vdso64ld = VDSO64L $@
46      cmd_vdso64ld = $(CC) $(c_flags) -Wl,-T $^ -o $@
47quiet_cmd_vdso64as = VDSO64A $@
48      cmd_vdso64as = $(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
54vdso64.so: $(obj)/vdso64.so.dbg
55	@mkdir -p $(MODLIB)/vdso
56	$(call cmd,vdso_install)
57
58vdso_install: vdso64.so