dc85570d88395a411842c7d419a0f2d2fb200914
[muen/linux.git] / arch / sparc / vdso / Makefile
1 #
2 # Building vDSO images for sparc.
3 #
4
5 KBUILD_CFLAGS += $(DISABLE_LTO)
6
7 VDSO64-$(CONFIG_SPARC64)        := y
8 VDSOCOMPAT-$(CONFIG_COMPAT)     := y
9
10 # files to link into the vdso
11 vobjs-y := vdso-note.o vclock_gettime.o
12
13 # files to link into kernel
14 obj-y                           += vma.o
15
16 # vDSO images to build
17 vdso_img-$(VDSO64-y)            += 64
18 vdso_img-$(VDSOCOMPAT-y)        += 32
19
20 vobjs := $(foreach F,$(vobjs-y),$(obj)/$F)
21
22 $(obj)/vdso.o: $(obj)/vdso.so
23
24 targets += vdso.lds $(vobjs-y)
25
26 # Build the vDSO image C files and link them in.
27 vdso_img_objs := $(vdso_img-y:%=vdso-image-%.o)
28 vdso_img_cfiles := $(vdso_img-y:%=vdso-image-%.c)
29 vdso_img_sodbg := $(vdso_img-y:%=vdso%.so.dbg)
30 obj-y += $(vdso_img_objs)
31 targets += $(vdso_img_cfiles)
32 targets += $(vdso_img_sodbg) $(vdso_img-y:%=vdso%.so)
33
34 CPPFLAGS_vdso.lds += -P -C
35
36 VDSO_LDFLAGS_vdso.lds = -m64 -Wl,-soname=linux-vdso.so.1 \
37                         -Wl,--no-undefined \
38                         -Wl,-z,max-page-size=8192 -Wl,-z,common-page-size=8192 \
39                         $(DISABLE_LTO)
40
41 $(obj)/vdso64.so.dbg: $(obj)/vdso.lds $(vobjs) FORCE
42         $(call if_changed,vdso)
43
44 HOST_EXTRACFLAGS += -I$(srctree)/tools/include
45 hostprogs-y                     += vdso2c
46
47 quiet_cmd_vdso2c = VDSO2C  $@
48       cmd_vdso2c = $(obj)/vdso2c $< $(<:%.dbg=%) $@
49
50 $(obj)/vdso-image-%.c: $(obj)/vdso%.so.dbg $(obj)/vdso%.so $(obj)/vdso2c FORCE
51         $(call if_changed,vdso2c)
52
53 #
54 # Don't omit frame pointers for ease of userspace debugging, but do
55 # optimize sibling calls.
56 #
57 CFL := $(PROFILING) -mcmodel=medlow -fPIC -O2 -fasynchronous-unwind-tables \
58        -m64 -ffixed-g2 -ffixed-g3 -fcall-used-g4 -fcall-used-g5 -ffixed-g6 \
59        -ffixed-g7 $(filter -g%,$(KBUILD_CFLAGS)) \
60        $(call cc-option, -fno-stack-protector) -fno-omit-frame-pointer \
61        -foptimize-sibling-calls -DBUILD_VDSO
62
63 $(vobjs): KBUILD_CFLAGS += $(CFL)
64
65 #
66 # vDSO code runs in userspace and -pg doesn't help with profiling anyway.
67 #
68 CFLAGS_REMOVE_vdso-note.o = -pg
69 CFLAGS_REMOVE_vclock_gettime.o = -pg
70
71 $(obj)/%.so: OBJCOPYFLAGS := -S
72 $(obj)/%.so: $(obj)/%.so.dbg
73         $(call if_changed,objcopy)
74
75 CPPFLAGS_vdso32.lds = $(CPPFLAGS_vdso.lds)
76 VDSO_LDFLAGS_vdso32.lds = -m32 -Wl,-m,elf32_sparc,-soname=linux-gate.so.1
77
78 #This makes sure the $(obj) subdirectory exists even though vdso32/
79 #is not a kbuild sub-make subdirectory
80 override obj-dirs = $(dir $(obj)) $(obj)/vdso32/
81
82 targets += vdso32/vdso32.lds
83 targets += vdso32/vdso-note.o
84 targets += vdso32/vclock_gettime.o
85
86 KBUILD_AFLAGS_32 := $(filter-out -m64,$(KBUILD_AFLAGS)) -DBUILD_VDSO
87 $(obj)/vdso32.so.dbg: KBUILD_AFLAGS = $(KBUILD_AFLAGS_32)
88 $(obj)/vdso32.so.dbg: asflags-$(CONFIG_SPARC64) += -m32
89
90 KBUILD_CFLAGS_32 := $(filter-out -m64,$(KBUILD_CFLAGS))
91 KBUILD_CFLAGS_32 := $(filter-out -mcmodel=medlow,$(KBUILD_CFLAGS_32))
92 KBUILD_CFLAGS_32 := $(filter-out -fno-pic,$(KBUILD_CFLAGS_32))
93 KBUILD_CFLAGS_32 := $(filter-out $(GCC_PLUGINS_CFLAGS),$(KBUILD_CFLAGS_32))
94 KBUILD_CFLAGS_32 += -m32 -msoft-float -fpic -mno-app-regs -ffixed-g7
95 KBUILD_CFLAGS_32 += $(call cc-option, -fno-stack-protector)
96 KBUILD_CFLAGS_32 += $(call cc-option, -foptimize-sibling-calls)
97 KBUILD_CFLAGS_32 += -fno-omit-frame-pointer
98 KBUILD_CFLAGS_32 += -DDISABLE_BRANCH_PROFILING
99 KBUILD_CFLAGS_32 += -mv8plus
100 $(obj)/vdso32.so.dbg: KBUILD_CFLAGS = $(KBUILD_CFLAGS_32)
101
102 $(obj)/vdso32.so.dbg: FORCE \
103                         $(obj)/vdso32/vdso32.lds \
104                         $(obj)/vdso32/vclock_gettime.o \
105                         $(obj)/vdso32/vdso-note.o
106                 $(call  if_changed,vdso)
107
108 #
109 # The DSO images are built using a special linker script.
110 #
111 quiet_cmd_vdso = VDSO    $@
112       cmd_vdso = $(CC) -nostdlib -o $@ \
113                        $(VDSO_LDFLAGS) $(VDSO_LDFLAGS_$(filter %.lds,$(^F))) \
114                        -Wl,-T,$(filter %.lds,$^) $(filter %.o,$^)
115
116 VDSO_LDFLAGS = -fPIC -shared $(call cc-ldoption, -Wl$(comma)--hash-style=sysv) \
117         $(call cc-ldoption, -Wl$(comma)--build-id) -Wl,-Bsymbolic
118 GCOV_PROFILE := n
119
120 #
121 # Install the unstripped copies of vdso*.so.  If our toolchain supports
122 # build-id, install .build-id links as well.
123 #
124 quiet_cmd_vdso_install = INSTALL $(@:install_%=%)
125 define cmd_vdso_install
126         cp $< "$(MODLIB)/vdso/$(@:install_%=%)"; \
127         if readelf -n $< |grep -q 'Build ID'; then \
128           buildid=`readelf -n $< |grep 'Build ID' |sed -e 's/^.*Build ID: \(.*\)$$/\1/'`; \
129           first=`echo $$buildid | cut -b-2`; \
130           last=`echo $$buildid | cut -b3-`; \
131           mkdir -p "$(MODLIB)/vdso/.build-id/$$first"; \
132           ln -sf "../../$(@:install_%=%)" "$(MODLIB)/vdso/.build-id/$$first/$$last.debug"; \
133         fi
134 endef
135
136 vdso_img_insttargets := $(vdso_img_sodbg:%.dbg=install_%)
137
138 $(MODLIB)/vdso: FORCE
139         @mkdir -p $(MODLIB)/vdso
140
141 $(vdso_img_insttargets): install_%: $(obj)/%.dbg $(MODLIB)/vdso FORCE
142         $(call cmd,vdso_install)
143
144 PHONY += vdso_install $(vdso_img_insttargets)
145 vdso_install: $(vdso_img_insttargets) FORCE