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 export CPPFLAGS_vdso.lds
+= -P
-C
36 VDSO_LDFLAGS_vdso.lds
= -m64
-Wl
,-soname
=linux-vdso.so
.1 \
38 -Wl
,-z
,max-page-size
=8192 -Wl
,-z
,common-page-size
=8192 \
41 $(obj
)/vdso64.so.dbg
: $(src
)/vdso.lds
$(vobjs
) FORCE
42 $(call if_changed
,vdso
)
44 HOST_EXTRACFLAGS
+= -I
$(srctree
)/tools
/include
47 quiet_cmd_vdso2c
= VDSO2C
$@
49 $(obj
)/vdso2c
$< $(<:%.dbg
=%) $@
52 $(obj
)/vdso-image-
%.c
: $(obj
)/vdso
%.so.dbg
$(obj
)/vdso
%.so
$(obj
)/vdso2c FORCE
53 $(call if_changed
,vdso2c
)
56 # Don't omit frame pointers for ease of userspace debugging, but do
57 # optimize sibling calls.
59 CFL
:= $(PROFILING
) -mcmodel
=medlow
-fPIC
-O2
-fasynchronous-unwind-tables \
60 -m64
-ffixed-g2
-ffixed-g3
-fcall-used-g4
-fcall-used-g5
-ffixed-g6 \
61 -ffixed-g7
$(filter -g
%,$(KBUILD_CFLAGS
)) \
62 $(call cc-option
, -fno-stack-protector
) -fno-omit-frame-pointer \
63 -foptimize-sibling-calls
-DBUILD_VDSO
65 $(vobjs
): KBUILD_CFLAGS
+= $(CFL
)
68 # vDSO code runs in userspace and -pg doesn't help with profiling anyway.
70 CFLAGS_REMOVE_vdso-note.o
= -pg
71 CFLAGS_REMOVE_vclock_gettime.o
= -pg
73 $(obj
)/%.so
: OBJCOPYFLAGS
:= -S
74 $(obj
)/%.so
: $(obj
)/%.so.dbg
75 $(call if_changed
,objcopy
)
77 CPPFLAGS_vdso32.lds
= $(CPPFLAGS_vdso.lds
)
78 VDSO_LDFLAGS_vdso32.lds
= -m32
-Wl
,-m
,elf32_sparc
,-soname
=linux-gate.so
.1
80 #This makes sure the $(obj) subdirectory exists even though vdso32/
81 #is not a kbuild sub-make subdirectory
82 override obj-dirs
= $(dir $(obj
)) $(obj
)/vdso32
/
84 targets
+= vdso32
/vdso32.lds
85 targets
+= vdso32
/vdso-note.o
86 targets
+= vdso32
/vclock_gettime.o
88 KBUILD_AFLAGS_32
:= $(filter-out -m64
,$(KBUILD_AFLAGS
)) -DBUILD_VDSO
89 $(obj
)/vdso32.so.dbg
: KBUILD_AFLAGS
= $(KBUILD_AFLAGS_32
)
90 $(obj
)/vdso32.so.dbg
: asflags-
$(CONFIG_SPARC64
) += -m32
92 KBUILD_CFLAGS_32
:= $(filter-out -m64
,$(KBUILD_CFLAGS
))
93 KBUILD_CFLAGS_32
:= $(filter-out -mcmodel
=medlow
,$(KBUILD_CFLAGS_32
))
94 KBUILD_CFLAGS_32
:= $(filter-out -fno-pic
,$(KBUILD_CFLAGS_32
))
95 KBUILD_CFLAGS_32
:= $(filter-out $(GCC_PLUGINS_CFLAGS
),$(KBUILD_CFLAGS_32
))
96 KBUILD_CFLAGS_32
+= -m32
-msoft-float
-fpic
-mno-app-regs
-ffixed-g7
97 KBUILD_CFLAGS_32
+= $(call cc-option
, -fno-stack-protector
)
98 KBUILD_CFLAGS_32
+= $(call cc-option
, -foptimize-sibling-calls
)
99 KBUILD_CFLAGS_32
+= -fno-omit-frame-pointer
100 KBUILD_CFLAGS_32
+= -DDISABLE_BRANCH_PROFILING
101 KBUILD_CFLAGS_32
+= -mv8plus
102 $(obj
)/vdso32.so.dbg
: KBUILD_CFLAGS
= $(KBUILD_CFLAGS_32
)
104 $(obj
)/vdso32.so.dbg
: FORCE \
105 $(obj
)/vdso32
/vdso32.lds \
106 $(obj
)/vdso32
/vclock_gettime.o \
107 $(obj
)/vdso32
/vdso-note.o
108 $(call if_changed
,vdso
)
111 # The DSO images are built using a special linker script.
113 quiet_cmd_vdso
= VDSO
$@
114 cmd_vdso
= $(CC
) -nostdlib
-o
$@ \
115 $(VDSO_LDFLAGS
) $(VDSO_LDFLAGS_
$(filter %.lds
,$(^F
))) \
116 -Wl
,-T
,$(filter %.lds
,$^
) $(filter %.o
,$^
)
118 VDSO_LDFLAGS
= -fPIC
-shared
$(call cc-ldoption
, -Wl
$(comma
)--hash-style
=sysv
) \
119 $(call cc-ldoption
, -Wl
$(comma
)--build-id
) -Wl
,-Bsymbolic
123 # Install the unstripped copies of vdso*.so. If our toolchain supports
124 # build-id, install .build-id links as well.
126 quiet_cmd_vdso_install
= INSTALL
$(@
:install_
%=%)
127 define cmd_vdso_install
128 cp
$< "$(MODLIB)/vdso/$(@:install_%=%)"; \
129 if readelf
-n
$< |grep
-q
'Build ID'; then \
130 buildid
=`readelf -n $< |grep 'Build ID' |sed -e 's/^.*Build ID: \(.*\)$$/\1/'`; \
131 first
=`echo $$buildid | cut -b-2`; \
132 last
=`echo $$buildid | cut -b3-`; \
133 mkdir
-p
"$(MODLIB)/vdso/.build-id/$$first"; \
134 ln
-sf
"../../$(@:install_%=%)" "$(MODLIB)/vdso/.build-id/$$first/$$last.debug"; \
138 vdso_img_insttargets
:= $(vdso_img_sodbg
:%.dbg
=install_
%)
140 $(MODLIB
)/vdso
: FORCE
141 @mkdir
-p
$(MODLIB
)/vdso
143 $(vdso_img_insttargets
): install_
%: $(obj
)/%.dbg
$(MODLIB
)/vdso FORCE
144 $(call cmd
,vdso_install
)
146 PHONY
+= vdso_install
$(vdso_img_insttargets
)
147 vdso_install
: $(vdso_img_insttargets
) FORCE