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-vdso64 = vdso_user_wrapper.o note.o
 9obj-cvdso64 = vdso64_generic.o getcpu.o
10VDSO_CFLAGS_REMOVE := -pg $(CC_FLAGS_FTRACE) $(CC_FLAGS_EXPOLINE) $(CC_FLAGS_CHECK_STACK)
11CFLAGS_REMOVE_getcpu.o = $(VDSO_CFLAGS_REMOVE)
12CFLAGS_REMOVE_vdso64_generic.o = $(VDSO_CFLAGS_REMOVE)
13
14# Build rules
15
16targets := $(obj-vdso64) $(obj-cvdso64) vdso64.so vdso64.so.dbg
17obj-vdso64 := $(addprefix $(obj)/, $(obj-vdso64))
18obj-cvdso64 := $(addprefix $(obj)/, $(obj-cvdso64))
19
20KBUILD_AFLAGS += -DBUILD_VDSO
21KBUILD_CFLAGS += -DBUILD_VDSO -DDISABLE_BRANCH_PROFILING
22
23KBUILD_AFLAGS_64 := $(filter-out -m64,$(KBUILD_AFLAGS))
24KBUILD_AFLAGS_64 += -m64
25
26KBUILD_CFLAGS_64 := $(filter-out -m64,$(KBUILD_CFLAGS))
27KBUILD_CFLAGS_64 := $(filter-out -mno-pic-data-is-text-relative,$(KBUILD_CFLAGS_64))
28KBUILD_CFLAGS_64 += -m64 -fPIC -fno-common -fno-builtin
29ldflags-y := -fPIC -shared -soname=linux-vdso64.so.1 \
30	     --hash-style=both --build-id=sha1 -T
31
32$(targets:%=$(obj)/%.dbg): KBUILD_CFLAGS = $(KBUILD_CFLAGS_64)
33$(targets:%=$(obj)/%.dbg): KBUILD_AFLAGS = $(KBUILD_AFLAGS_64)
34
35obj-y += vdso64_wrapper.o
36targets += vdso64.lds
37CPPFLAGS_vdso64.lds += -P -C -U$(ARCH)
38
39# Disable gcov profiling, ubsan and kasan for VDSO code
40GCOV_PROFILE := n
41UBSAN_SANITIZE := n
42KASAN_SANITIZE := n
43KCSAN_SANITIZE := n
44
45# Force dependency (incbin is bad)
46$(obj)/vdso64_wrapper.o : $(obj)/vdso64.so
47
48quiet_cmd_vdso_and_check = VDSO    $@
49      cmd_vdso_and_check = $(cmd_ld); $(cmd_vdso_check)
50
51# link rule for the .so file, .lds has to be first
52$(obj)/vdso64.so.dbg: $(src)/vdso64.lds $(obj-vdso64) $(obj-cvdso64) FORCE
53	$(call if_changed,vdso_and_check)
54
55# strip rule for the .so file
56$(obj)/%.so: OBJCOPYFLAGS := -S
57$(obj)/%.so: $(obj)/%.so.dbg FORCE
58	$(call if_changed,objcopy)
59
60# assembly rules for the .S files
61$(obj-vdso64): %.o: %.S FORCE
62	$(call if_changed_dep,vdso64as)
63
64$(obj-cvdso64): %.o: %.c FORCE
65	$(call if_changed_dep,vdso64cc)
66
67# actual build commands
68quiet_cmd_vdso64as = VDSO64A $@
69      cmd_vdso64as = $(CC) $(a_flags) -c -o $@ $<
70quiet_cmd_vdso64cc = VDSO64C $@
71      cmd_vdso64cc = $(CC) $(c_flags) -c -o $@ $<
 
 
 
 
 
 
 
 
 
 
72
73# Generate VDSO offsets using helper script
74gen-vdsosym := $(srctree)/$(src)/gen_vdso_offsets.sh
75quiet_cmd_vdsosym = VDSOSYM $@
76	cmd_vdsosym = $(NM) $< | $(gen-vdsosym) | LC_ALL=C sort > $@
77
78include/generated/vdso64-offsets.h: $(obj)/vdso64.so.dbg FORCE
79	$(call if_changed,vdsosym)

 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-vdso64 = vdso_user_wrapper.o note.o
10obj-cvdso64 = vdso64_generic.o getcpu.o
11CFLAGS_REMOVE_getcpu.o = -pg $(CC_FLAGS_FTRACE) $(CC_FLAGS_EXPOLINE)
12CFLAGS_REMOVE_vdso64_generic.o = -pg $(CC_FLAGS_FTRACE) $(CC_FLAGS_EXPOLINE)
 
13
14# Build rules
15
16targets := $(obj-vdso64) $(obj-cvdso64) vdso64.so vdso64.so.dbg
17obj-vdso64 := $(addprefix $(obj)/, $(obj-vdso64))
18obj-cvdso64 := $(addprefix $(obj)/, $(obj-cvdso64))
19
20KBUILD_AFLAGS += -DBUILD_VDSO
21KBUILD_CFLAGS += -DBUILD_VDSO -DDISABLE_BRANCH_PROFILING
22
23KBUILD_AFLAGS_64 := $(filter-out -m64,$(KBUILD_AFLAGS))
24KBUILD_AFLAGS_64 += -m64 -s
25
26KBUILD_CFLAGS_64 := $(filter-out -m64,$(KBUILD_CFLAGS))
27KBUILD_CFLAGS_64 += -m64 -fPIC -shared -fno-common -fno-builtin
28ldflags-y := -fPIC -shared -nostdlib -soname=linux-vdso64.so.1 \
 
29	     --hash-style=both --build-id=sha1 -T
30
31$(targets:%=$(obj)/%.dbg): KBUILD_CFLAGS = $(KBUILD_CFLAGS_64)
32$(targets:%=$(obj)/%.dbg): KBUILD_AFLAGS = $(KBUILD_AFLAGS_64)
33
34obj-y += vdso64_wrapper.o
35targets += vdso64.lds
36CPPFLAGS_vdso64.lds += -P -C -U$(ARCH)
37
38# Disable gcov profiling, ubsan and kasan for VDSO code
39GCOV_PROFILE := n
40UBSAN_SANITIZE := n
41KASAN_SANITIZE := n
 
42
43# Force dependency (incbin is bad)
44$(obj)/vdso64_wrapper.o : $(obj)/vdso64.so
45
 
 
 
46# link rule for the .so file, .lds has to be first
47$(obj)/vdso64.so.dbg: $(src)/vdso64.lds $(obj-vdso64) $(obj-cvdso64) FORCE
48	$(call if_changed,ld)
49
50# strip rule for the .so file
51$(obj)/%.so: OBJCOPYFLAGS := -S
52$(obj)/%.so: $(obj)/%.so.dbg FORCE
53	$(call if_changed,objcopy)
54
55# assembly rules for the .S files
56$(obj-vdso64): %.o: %.S FORCE
57	$(call if_changed_dep,vdso64as)
58
59$(obj-cvdso64): %.o: %.c FORCE
60	$(call if_changed_dep,vdso64cc)
61
62# actual build commands
63quiet_cmd_vdso64as = VDSO64A $@
64      cmd_vdso64as = $(CC) $(a_flags) -c -o $@ $<
65quiet_cmd_vdso64cc = VDSO64C $@
66      cmd_vdso64cc = $(CC) $(c_flags) -c -o $@ $<
67
68# install commands for the unstripped file
69quiet_cmd_vdso_install = INSTALL $@
70      cmd_vdso_install = cp $(obj)/$@.dbg $(MODLIB)/vdso/$@
71
72vdso64.so: $(obj)/vdso64.so.dbg
73	@mkdir -p $(MODLIB)/vdso
74	$(call cmd,vdso_install)
75
76vdso_install: vdso64.so
77
78# Generate VDSO offsets using helper script
79gen-vdsosym := $(srctree)/$(src)/gen_vdso_offsets.sh
80quiet_cmd_vdsosym = VDSOSYM $@
81	cmd_vdsosym = $(NM) $< | $(gen-vdsosym) | LC_ALL=C sort > $@
82
83include/generated/vdso64-offsets.h: $(obj)/vdso64.so.dbg FORCE
84	$(call if_changed,vdsosym)