1 # SPDX-License-Identifier: GPL-2.0
2
3 # Include the generic Makefile to check the bu
4 include $(srctree)/lib/vdso/Makefile
5
6 hostprogs := vdsomunge
7
8 obj-vdso := vgettimeofday.o datapage.o note.o
9
10 # Build rules
11 targets := $(obj-vdso) vdso.so vdso.so.dbg vds
12 obj-vdso := $(addprefix $(obj)/, $(obj-vdso))
13
14 ccflags-y := -fPIC -fno-common -fno-builtin -f
15 ccflags-y += -DDISABLE_BRANCH_PROFILING -DBUIL
16
17 ldflags-$(CONFIG_CPU_ENDIAN_BE8) := --be8
18 ldflags-y := -Bsymbolic --no-undefined -soname
19 -z max-page-size=4096 -shared $(ld
20 --hash-style=sysv --build-id=sha1
21 -T
22
23 obj-$(CONFIG_VDSO) += vdso.o
24 CPPFLAGS_vdso.lds += -P -C -U$(ARCH)
25
26 CFLAGS_REMOVE_vdso.o = -pg
27
28 # Force -O2 to avoid libgcc dependencies
29 CFLAGS_REMOVE_vgettimeofday.o = -pg -Os $(RAND
30 ifeq ($(c-gettimeofday-y),)
31 CFLAGS_vgettimeofday.o = -O2
32 else
33 CFLAGS_vgettimeofday.o = -O2 -include $(c-gett
34 endif
35
36 # Force dependency
37 $(obj)/vdso.o : $(obj)/vdso.so
38
39 # Link rule for the .so file
40 $(obj)/vdso.so.raw: $(obj)/vdso.lds $(obj-vdso
41 $(call if_changed,vdsold_and_vdso_chec
42
43 $(obj)/vdso.so.dbg: $(obj)/vdso.so.raw $(obj)/
44 $(call if_changed,vdsomunge)
45
46 # Strip rule for the .so file
47 $(obj)/%.so: OBJCOPYFLAGS := -S
48 $(obj)/%.so: $(obj)/%.so.dbg FORCE
49 $(call if_changed,objcopy)
50
51 # Actual build commands
52 quiet_cmd_vdsold_and_vdso_check = LD $@
53 cmd_vdsold_and_vdso_check = $(cmd_ld); $
54
55 quiet_cmd_vdsomunge = MUNGE $@
56 cmd_vdsomunge = $(objtree)/$(obj)/vdsomu
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