1 # SPDX-License-Identifier: GPL-2.0-only
3 # Building vDSO images for sparc.
6 # files to link into the vdso
7 vobjs-y
:= vdso-note.o vclock_gettime.o
9 # files to link into kernel
12 # vDSO images to build
13 obj-
$(CONFIG_SPARC64
) += vdso-image-64.o
14 obj-
$(CONFIG_COMPAT
) += vdso-image-32.o
16 vobjs
:= $(addprefix $(obj
)/, $(vobjs-y
))
18 $(obj
)/vdso.o
: $(obj
)/vdso.so
20 targets
+= vdso.lds
$(vobjs-y
)
21 targets
+= $(foreach x
, 32 64, vdso-image-
$(x
).c vdso
$(x
).so vdso
$(x
).so.dbg
)
23 CPPFLAGS_vdso.lds
+= -P
-C
25 VDSO_LDFLAGS_vdso.lds
= -m elf64_sparc
-soname linux-vdso.so
.1 --no-undefined \
28 $(obj
)/vdso64.so.dbg
: $(obj
)/vdso.lds
$(vobjs
) FORCE
29 $(call if_changed
,vdso
)
31 HOST_EXTRACFLAGS
+= -I
$(srctree
)/tools
/include
34 quiet_cmd_vdso2c
= VDSO2C
$@
35 cmd_vdso2c
= $(obj
)/vdso2c
$< $(<:%.dbg
=%) $@
37 $(obj
)/vdso-image-
%.c
: $(obj
)/vdso
%.so.dbg
$(obj
)/vdso
%.so
$(obj
)/vdso2c FORCE
38 $(call if_changed
,vdso2c
)
41 # Don't omit frame pointers for ease of userspace debugging, but do
42 # optimize sibling calls.
44 CFL
:= $(PROFILING
) -mcmodel
=medlow
-fPIC
-O2
-fasynchronous-unwind-tables
-m64 \
45 $(filter -g
%,$(KBUILD_CFLAGS
)) -fno-stack-protector \
46 -fno-omit-frame-pointer
-foptimize-sibling-calls \
47 -DDISABLE_BRANCH_PROFILING
-DBUILD_VDSO
49 SPARC_REG_CFLAGS
= -ffixed-g4
-ffixed-g5
$(call cc-option
,-fcall-used-g5
) $(call cc-option
,-fcall-used-g7
)
51 $(vobjs
): KBUILD_CFLAGS
:= $(filter-out $(RANDSTRUCT_CFLAGS
) $(GCC_PLUGINS_CFLAGS
) $(SPARC_REG_CFLAGS
),$(KBUILD_CFLAGS
)) $(CFL
)
54 # vDSO code runs in userspace and -pg doesn't help with profiling anyway.
56 CFLAGS_REMOVE_vclock_gettime.o
= -pg
57 CFLAGS_REMOVE_vdso32
/vclock_gettime.o
= -pg
59 $(obj
)/%.so
: OBJCOPYFLAGS
:= -S
60 $(obj
)/%.so
: $(obj
)/%.so.dbg FORCE
61 $(call if_changed
,objcopy
)
63 CPPFLAGS_vdso32
/vdso32.lds
= $(CPPFLAGS_vdso.lds
)
64 VDSO_LDFLAGS_vdso32.lds
= -m elf32_sparc
-soname linux-gate.so
.1
66 #This makes sure the $(obj) subdirectory exists even though vdso32/
67 #is not a kbuild sub-make subdirectory
68 override obj-dirs
= $(dir $(obj
)) $(obj
)/vdso32
/
70 targets
+= vdso32
/vdso32.lds
71 targets
+= vdso32
/vdso-note.o
72 targets
+= vdso32
/vclock_gettime.o
74 KBUILD_AFLAGS_32
:= $(filter-out -m64
,$(KBUILD_AFLAGS
)) -DBUILD_VDSO
75 $(obj
)/vdso32.so.dbg
: KBUILD_AFLAGS
= $(KBUILD_AFLAGS_32
)
76 $(obj
)/vdso32.so.dbg
: asflags-
$(CONFIG_SPARC64
) += -m32
78 KBUILD_CFLAGS_32
:= $(filter-out -m64
,$(KBUILD_CFLAGS
))
79 KBUILD_CFLAGS_32
:= $(filter-out -mcmodel
=medlow
,$(KBUILD_CFLAGS_32
))
80 KBUILD_CFLAGS_32
:= $(filter-out -fno-pic
,$(KBUILD_CFLAGS_32
))
81 KBUILD_CFLAGS_32
:= $(filter-out $(RANDSTRUCT_CFLAGS
),$(KBUILD_CFLAGS_32
))
82 KBUILD_CFLAGS_32
:= $(filter-out $(GCC_PLUGINS_CFLAGS
),$(KBUILD_CFLAGS_32
))
83 KBUILD_CFLAGS_32
:= $(filter-out $(SPARC_REG_CFLAGS
),$(KBUILD_CFLAGS_32
))
84 KBUILD_CFLAGS_32
+= -m32
-msoft-float
-fpic
85 KBUILD_CFLAGS_32
+= -fno-stack-protector
86 KBUILD_CFLAGS_32
+= $(call cc-option
, -foptimize-sibling-calls
)
87 KBUILD_CFLAGS_32
+= -fno-omit-frame-pointer
88 KBUILD_CFLAGS_32
+= -DDISABLE_BRANCH_PROFILING
89 KBUILD_CFLAGS_32
+= -mv8plus
90 $(obj
)/vdso32.so.dbg
: KBUILD_CFLAGS
= $(KBUILD_CFLAGS_32
)
92 $(obj
)/vdso32.so.dbg
: FORCE \
93 $(obj
)/vdso32
/vdso32.lds \
94 $(obj
)/vdso32
/vclock_gettime.o \
95 $(obj
)/vdso32
/vdso-note.o
96 $(call if_changed
,vdso
)
99 # The DSO images are built using a special linker script.
101 quiet_cmd_vdso
= VDSO
$@
102 cmd_vdso
= $(LD
) -nostdlib
-o
$@ \
103 $(VDSO_LDFLAGS
) $(VDSO_LDFLAGS_
$(filter %.lds
,$(^F
))) \
104 -T
$(filter %.lds
,$^
) $(filter %.o
,$^
) && \
105 sh
$(src
)/checkundef.sh
'$(OBJDUMP)' '$@'
107 VDSO_LDFLAGS
= -shared
--hash-style
=both
--build-id
=sha1
-Bsymbolic