2 # Building vDSO images for sparc.
5 KBUILD_CFLAGS += $(DISABLE_LTO)
7 VDSO64-$(CONFIG_SPARC64) := y
8 VDSOCOMPAT-$(CONFIG_COMPAT) := y
10 # files to link into the vdso
11 vobjs-y := vdso-note.o vclock_gettime.o
13 # files to link into kernel
16 # vDSO images to build
17 vdso_img-$(VDSO64-y) += 64
18 vdso_img-$(VDSOCOMPAT-y) += 32
20 vobjs := $(foreach F,$(vobjs-y),$(obj)/$F)
22 $(obj)/vdso.o: $(obj)/vdso.so
24 targets += vdso.lds $(vobjs-y)
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)
34 CPPFLAGS_vdso.lds += -P -C
36 VDSO_LDFLAGS_vdso.lds = -m elf64_sparc -soname linux-vdso.so.1 --no-undefined \
39 $(obj)/vdso64.so.dbg: $(obj)/vdso.lds $(vobjs) FORCE
40 $(call if_changed,vdso)
42 HOST_EXTRACFLAGS += -I$(srctree)/tools/include
45 quiet_cmd_vdso2c = VDSO2C $@
46 cmd_vdso2c = $(obj)/vdso2c $< $(<:%.dbg=%) $@
48 $(obj)/vdso-image-%.c: $(obj)/vdso%.so.dbg $(obj)/vdso%.so $(obj)/vdso2c FORCE
49 $(call if_changed,vdso2c)
52 # Don't omit frame pointers for ease of userspace debugging, but do
53 # optimize sibling calls.
55 CFL := $(PROFILING) -mcmodel=medlow -fPIC -O2 -fasynchronous-unwind-tables -m64 \
56 $(filter -g%,$(KBUILD_CFLAGS)) $(call cc-option, -fno-stack-protector) \
57 -fno-omit-frame-pointer -foptimize-sibling-calls \
58 -DDISABLE_BRANCH_PROFILING -DBUILD_VDSO
60 SPARC_REG_CFLAGS = -ffixed-g4 -ffixed-g5 -fcall-used-g5 -fcall-used-g7
62 $(vobjs): KBUILD_CFLAGS := $(filter-out $(GCC_PLUGINS_CFLAGS) $(SPARC_REG_CFLAGS),$(KBUILD_CFLAGS)) $(CFL)
65 # vDSO code runs in userspace and -pg doesn't help with profiling anyway.
67 CFLAGS_REMOVE_vdso-note.o = -pg
68 CFLAGS_REMOVE_vclock_gettime.o = -pg
70 $(obj)/%.so: OBJCOPYFLAGS := -S
71 $(obj)/%.so: $(obj)/%.so.dbg
72 $(call if_changed,objcopy)
74 CPPFLAGS_vdso32.lds = $(CPPFLAGS_vdso.lds)
75 VDSO_LDFLAGS_vdso32.lds = -m elf32_sparc -soname linux-gate.so.1
77 #This makes sure the $(obj) subdirectory exists even though vdso32/
78 #is not a kbuild sub-make subdirectory
79 override obj-dirs = $(dir $(obj)) $(obj)/vdso32/
81 targets += vdso32/vdso32.lds
82 targets += vdso32/vdso-note.o
83 targets += vdso32/vclock_gettime.o
85 KBUILD_AFLAGS_32 := $(filter-out -m64,$(KBUILD_AFLAGS)) -DBUILD_VDSO
86 $(obj)/vdso32.so.dbg: KBUILD_AFLAGS = $(KBUILD_AFLAGS_32)
87 $(obj)/vdso32.so.dbg: asflags-$(CONFIG_SPARC64) += -m32
89 KBUILD_CFLAGS_32 := $(filter-out -m64,$(KBUILD_CFLAGS))
90 KBUILD_CFLAGS_32 := $(filter-out -mcmodel=medlow,$(KBUILD_CFLAGS_32))
91 KBUILD_CFLAGS_32 := $(filter-out -fno-pic,$(KBUILD_CFLAGS_32))
92 KBUILD_CFLAGS_32 := $(filter-out $(GCC_PLUGINS_CFLAGS),$(KBUILD_CFLAGS_32))
93 KBUILD_CFLAGS_32 := $(filter-out $(SPARC_REG_CFLAGS),$(KBUILD_CFLAGS_32))
94 KBUILD_CFLAGS_32 += -m32 -msoft-float -fpic
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)
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)
109 # The DSO images are built using a special linker script.
111 quiet_cmd_vdso = VDSO $@
112 cmd_vdso = $(LD) -nostdlib -o $@ \
113 $(VDSO_LDFLAGS) $(VDSO_LDFLAGS_$(filter %.lds,$(^F))) \
114 -T $(filter %.lds,$^) $(filter %.o,$^) && \
115 sh $(srctree)/$(src)/checkundef.sh '$(OBJDUMP)' '$@'
117 VDSO_LDFLAGS = -shared $(call ld-option, --hash-style=both) \
118 $(call ld-option, --build-id) -Bsymbolic
122 # Install the unstripped copies of vdso*.so. If our toolchain supports
123 # build-id, install .build-id links as well.
125 quiet_cmd_vdso_install = INSTALL $(@:install_%=%)
126 define cmd_vdso_install
127 cp $< "$(MODLIB)/vdso/$(@:install_%=%)"; \
128 if readelf -n $< |grep -q 'Build ID'; then \
129 buildid=`readelf -n $< |grep 'Build ID' |sed -e 's/^.*Build ID: \(.*\)$$/\1/'`; \
130 first=`echo $$buildid | cut -b-2`; \
131 last=`echo $$buildid | cut -b3-`; \
132 mkdir -p "$(MODLIB)/vdso/.build-id/$$first"; \
133 ln -sf "../../$(@:install_%=%)" "$(MODLIB)/vdso/.build-id/$$first/$$last.debug"; \
137 vdso_img_insttargets := $(vdso_img_sodbg:%.dbg=install_%)
139 $(MODLIB)/vdso: FORCE
140 @mkdir -p $(MODLIB)/vdso
142 $(vdso_img_insttargets): install_%: $(obj)/%.dbg $(MODLIB)/vdso FORCE
143 $(call cmd,vdso_install)
145 PHONY += vdso_install $(vdso_img_insttargets)
146 vdso_install: $(vdso_img_insttargets) FORCE