um: take arch/um/sys-x86 to arch/x86/um
[linux-3.10.git] / arch / x86 / um / vdso / Makefile
1 #
2 # Building vDSO images for x86.
3 #
4
5 VDSO64-y                := y
6
7 vdso-install-$(VDSO64-y)        += vdso.so
8
9
10 # files to link into the vdso
11 vobjs-y := vdso-note.o um_vdso.o
12
13 # files to link into kernel
14 obj-$(VDSO64-y)                 += vdso.o vma.o
15
16 vobjs := $(foreach F,$(vobjs-y),$(obj)/$F)
17
18 $(obj)/vdso.o: $(obj)/vdso.so
19
20 targets += vdso.so vdso.so.dbg vdso.lds $(vobjs-y)
21
22 export CPPFLAGS_vdso.lds += -P -C
23
24 VDSO_LDFLAGS_vdso.lds = -m64 -Wl,-soname=linux-vdso.so.1 \
25        -Wl,-z,max-page-size=4096 -Wl,-z,common-page-size=4096
26
27 $(obj)/vdso.o: $(src)/vdso.S $(obj)/vdso.so
28
29 $(obj)/vdso.so.dbg: $(src)/vdso.lds $(vobjs) FORCE
30         $(call if_changed,vdso)
31
32 $(obj)/%.so: OBJCOPYFLAGS := -S
33 $(obj)/%.so: $(obj)/%.so.dbg FORCE
34         $(call if_changed,objcopy)
35
36 #
37 # Don't omit frame pointers for ease of userspace debugging, but do
38 # optimize sibling calls.
39 #
40 CFL := $(PROFILING) -mcmodel=small -fPIC -O2 -fasynchronous-unwind-tables -m64 \
41        $(filter -g%,$(KBUILD_CFLAGS)) $(call cc-option, -fno-stack-protector) \
42        -fno-omit-frame-pointer -foptimize-sibling-calls
43
44 $(vobjs): KBUILD_CFLAGS += $(CFL)
45
46 #
47 # vDSO code runs in userspace and -pg doesn't help with profiling anyway.
48 #
49 CFLAGS_REMOVE_vdso-note.o = -pg
50 CFLAGS_REMOVE_um_vdso.o = -pg
51
52 targets += vdso-syms.lds
53 obj-$(VDSO64-y)                 += vdso-syms.lds
54
55 #
56 # Match symbols in the DSO that look like VDSO*; produce a file of constants.
57 #
58 sed-vdsosym := -e 's/^00*/0/' \
59         -e 's/^\([0-9a-fA-F]*\) . \(VDSO[a-zA-Z0-9_]*\)$$/\2 = 0x\1;/p'
60 quiet_cmd_vdsosym = VDSOSYM $@
61 define cmd_vdsosym
62         $(NM) $< | LC_ALL=C sed -n $(sed-vdsosym) | LC_ALL=C sort > $@
63 endef
64
65 $(obj)/%-syms.lds: $(obj)/%.so.dbg FORCE
66         $(call if_changed,vdsosym)
67
68 #
69 # The DSO images are built using a special linker script.
70 #
71 quiet_cmd_vdso = VDSO    $@
72       cmd_vdso = $(CC) -nostdlib -o $@ \
73                        $(VDSO_LDFLAGS) $(VDSO_LDFLAGS_$(filter %.lds,$(^F))) \
74                        -Wl,-T,$(filter %.lds,$^) $(filter %.o,$^) && \
75                  sh $(srctree)/$(src)/checkundef.sh '$(NM)' '$@'
76
77 VDSO_LDFLAGS = -fPIC -shared $(call cc-ldoption, -Wl$(comma)--hash-style=sysv)
78 GCOV_PROFILE := n
79
80 #
81 # Install the unstripped copy of vdso*.so listed in $(vdso-install-y).
82 #
83 quiet_cmd_vdso_install = INSTALL $@
84       cmd_vdso_install = cp $(obj)/$@.dbg $(MODLIB)/vdso/$@
85 $(vdso-install-y): %.so: $(obj)/%.so.dbg FORCE
86         @mkdir -p $(MODLIB)/vdso
87         $(call cmd,vdso_install)
88
89 PHONY += vdso_install $(vdso-install-y)
90 vdso_install: $(vdso-install-y)