Commit | Line | Data |
---|---|---|
8512287a NL |
1 | hostprogs-y := vdsomunge |
2 | ||
3 | obj-vdso := vgettimeofday.o datapage.o | |
4 | ||
5 | # Build rules | |
6 | targets := $(obj-vdso) vdso.so vdso.so.dbg vdso.so.raw vdso.lds | |
7 | obj-vdso := $(addprefix $(obj)/, $(obj-vdso)) | |
8 | ||
d33ce23b NL |
9 | ccflags-y := -fPIC -fno-common -fno-builtin -fno-stack-protector |
10 | ccflags-y += -DDISABLE_BRANCH_PROFILING | |
11 | ||
12 | VDSO_LDFLAGS := -Wl,-Bsymbolic -Wl,--no-undefined -Wl,-soname=linux-vdso.so.1 | |
13 | VDSO_LDFLAGS += -Wl,-z,max-page-size=4096 -Wl,-z,common-page-size=4096 | |
14 | VDSO_LDFLAGS += -nostdlib -shared | |
15 | VDSO_LDFLAGS += $(call cc-ldoption, -Wl$(comma)--hash-style=sysv) | |
16 | VDSO_LDFLAGS += $(call cc-ldoption, -Wl$(comma)--build-id) | |
3473f265 | 17 | VDSO_LDFLAGS += $(call cc-ldoption, -fuse-ld=bfd) |
8512287a | 18 | |
f80f6531 NL |
19 | obj-$(CONFIG_VDSO) += vdso.o |
20 | extra-$(CONFIG_VDSO) += vdso.lds | |
8512287a NL |
21 | CPPFLAGS_vdso.lds += -P -C -U$(ARCH) |
22 | ||
23 | CFLAGS_REMOVE_vdso.o = -pg | |
24 | ||
25 | # Force -O2 to avoid libgcc dependencies | |
26 | CFLAGS_REMOVE_vgettimeofday.o = -pg -Os | |
27 | CFLAGS_vgettimeofday.o = -O2 | |
28 | ||
29 | # Disable gcov profiling for VDSO code | |
30 | GCOV_PROFILE := n | |
31 | ||
32 | # Force dependency | |
33 | $(obj)/vdso.o : $(obj)/vdso.so | |
34 | ||
35 | # Link rule for the .so file | |
36 | $(obj)/vdso.so.raw: $(src)/vdso.lds $(obj-vdso) FORCE | |
37 | $(call if_changed,vdsold) | |
38 | ||
39 | $(obj)/vdso.so.dbg: $(obj)/vdso.so.raw $(obj)/vdsomunge FORCE | |
40 | $(call if_changed,vdsomunge) | |
41 | ||
42 | # Strip rule for the .so file | |
43 | $(obj)/%.so: OBJCOPYFLAGS := -S | |
44 | $(obj)/%.so: $(obj)/%.so.dbg FORCE | |
45 | $(call if_changed,objcopy) | |
46 | ||
47 | # Actual build commands | |
48 | quiet_cmd_vdsold = VDSO $@ | |
d33ce23b NL |
49 | cmd_vdsold = $(CC) $(c_flags) $(VDSO_LDFLAGS) \ |
50 | -Wl,-T $(filter %.lds,$^) $(filter %.o,$^) -o $@ | |
8512287a NL |
51 | |
52 | quiet_cmd_vdsomunge = MUNGE $@ | |
53 | cmd_vdsomunge = $(objtree)/$(obj)/vdsomunge $< $@ | |
54 | ||
55 | # | |
56 | # Install the unstripped copy of vdso.so.dbg. If our toolchain | |
57 | # supports build-id, install .build-id links as well. | |
58 | # | |
59 | # Cribbed from arch/x86/vdso/Makefile. | |
60 | # | |
61 | quiet_cmd_vdso_install = INSTALL $< | |
62 | define cmd_vdso_install | |
63 | cp $< "$(MODLIB)/vdso/vdso.so"; \ | |
64 | if readelf -n $< | grep -q 'Build ID'; then \ | |
65 | buildid=`readelf -n $< |grep 'Build ID' |sed -e 's/^.*Build ID: \(.*\)$$/\1/'`; \ | |
66 | first=`echo $$buildid | cut -b-2`; \ | |
67 | last=`echo $$buildid | cut -b3-`; \ | |
68 | mkdir -p "$(MODLIB)/vdso/.build-id/$$first"; \ | |
69 | ln -sf "../../vdso.so" "$(MODLIB)/vdso/.build-id/$$first/$$last.debug"; \ | |
70 | fi | |
71 | endef | |
72 | ||
73 | $(MODLIB)/vdso: FORCE | |
74 | @mkdir -p $(MODLIB)/vdso | |
75 | ||
76 | PHONY += vdso_install | |
77 | vdso_install: $(obj)/vdso.so.dbg $(MODLIB)/vdso FORCE | |
78 | $(call cmd,vdso_install) |