1 # SPDX-License-Identifier: GPL-2.0 !! 1 # SPDX-License-Identifier: GPL-2.0-only
>> 2 #
>> 3 # Building vDSO images for sparc.
>> 4 #
>> 5 UBSAN_SANITIZE := n
2 6
3 # Include the generic Makefile to check the bu !! 7 # files to link into the vdso
4 include $(srctree)/lib/vdso/Makefile !! 8 vobjs-y := vdso-note.o vclock_gettime.o
5 9
6 hostprogs := vdsomunge !! 10 # files to link into kernel
>> 11 obj-y += vma.o
7 12
8 obj-vdso := vgettimeofday.o datapage.o note.o !! 13 # vDSO images to build
>> 14 obj-$(CONFIG_SPARC64) += vdso-image-64.o
>> 15 obj-$(CONFIG_COMPAT) += vdso-image-32.o
9 16
10 # Build rules !! 17 vobjs := $(addprefix $(obj)/, $(vobjs-y))
11 targets := $(obj-vdso) vdso.so vdso.so.dbg vds <<
12 obj-vdso := $(addprefix $(obj)/, $(obj-vdso)) <<
13 18
14 ccflags-y := -fPIC -fno-common -fno-builtin -f !! 19 $(obj)/vdso.o: $(obj)/vdso.so
15 ccflags-y += -DDISABLE_BRANCH_PROFILING -DBUIL <<
16 20
17 ldflags-$(CONFIG_CPU_ENDIAN_BE8) := --be8 !! 21 targets += vdso.lds $(vobjs-y)
18 ldflags-y := -Bsymbolic --no-undefined -soname !! 22 targets += $(foreach x, 32 64, vdso-image-$(x).c vdso$(x).so vdso$(x).so.dbg)
19 -z max-page-size=4096 -shared $(ld <<
20 --hash-style=sysv --build-id=sha1 <<
21 -T <<
22 23
23 obj-$(CONFIG_VDSO) += vdso.o !! 24 CPPFLAGS_vdso.lds += -P -C
24 CPPFLAGS_vdso.lds += -P -C -U$(ARCH) <<
25 25
26 CFLAGS_REMOVE_vdso.o = -pg !! 26 VDSO_LDFLAGS_vdso.lds = -m elf64_sparc -soname linux-vdso.so.1 --no-undefined \
>> 27 -z max-page-size=8192
27 28
28 # Force -O2 to avoid libgcc dependencies !! 29 $(obj)/vdso64.so.dbg: $(obj)/vdso.lds $(vobjs) FORCE
29 CFLAGS_REMOVE_vgettimeofday.o = -pg -Os $(RAND !! 30 $(call if_changed,vdso)
30 ifeq ($(c-gettimeofday-y),) <<
31 CFLAGS_vgettimeofday.o = -O2 <<
32 else <<
33 CFLAGS_vgettimeofday.o = -O2 -include $(c-gett <<
34 endif <<
35 31
36 # Force dependency !! 32 HOST_EXTRACFLAGS += -I$(srctree)/tools/include
37 $(obj)/vdso.o : $(obj)/vdso.so !! 33 hostprogs += vdso2c
38 34
39 # Link rule for the .so file !! 35 quiet_cmd_vdso2c = VDSO2C $@
40 $(obj)/vdso.so.raw: $(obj)/vdso.lds $(obj-vdso !! 36 cmd_vdso2c = $(obj)/vdso2c $< $(<:%.dbg=%) $@
41 $(call if_changed,vdsold_and_vdso_chec <<
42 37
43 $(obj)/vdso.so.dbg: $(obj)/vdso.so.raw $(obj)/ !! 38 $(obj)/vdso-image-%.c: $(obj)/vdso%.so.dbg $(obj)/vdso%.so $(obj)/vdso2c FORCE
44 $(call if_changed,vdsomunge) !! 39 $(call if_changed,vdso2c)
>> 40
>> 41 #
>> 42 # Don't omit frame pointers for ease of userspace debugging, but do
>> 43 # optimize sibling calls.
>> 44 #
>> 45 CFL := $(PROFILING) -mcmodel=medlow -fPIC -O2 -fasynchronous-unwind-tables -m64 \
>> 46 $(filter -g%,$(KBUILD_CFLAGS)) -fno-stack-protector \
>> 47 -fno-omit-frame-pointer -foptimize-sibling-calls \
>> 48 -DDISABLE_BRANCH_PROFILING -DBUILD_VDSO
>> 49
>> 50 SPARC_REG_CFLAGS = -ffixed-g4 -ffixed-g5 -fcall-used-g5 -fcall-used-g7
>> 51
>> 52 $(vobjs): KBUILD_CFLAGS := $(filter-out $(RANDSTRUCT_CFLAGS) $(GCC_PLUGINS_CFLAGS) $(SPARC_REG_CFLAGS),$(KBUILD_CFLAGS)) $(CFL)
>> 53
>> 54 #
>> 55 # vDSO code runs in userspace and -pg doesn't help with profiling anyway.
>> 56 #
>> 57 CFLAGS_REMOVE_vclock_gettime.o = -pg
>> 58 CFLAGS_REMOVE_vdso32/vclock_gettime.o = -pg
45 59
46 # Strip rule for the .so file <<
47 $(obj)/%.so: OBJCOPYFLAGS := -S 60 $(obj)/%.so: OBJCOPYFLAGS := -S
48 $(obj)/%.so: $(obj)/%.so.dbg FORCE 61 $(obj)/%.so: $(obj)/%.so.dbg FORCE
49 $(call if_changed,objcopy) 62 $(call if_changed,objcopy)
50 63
51 # Actual build commands !! 64 CPPFLAGS_vdso32/vdso32.lds = $(CPPFLAGS_vdso.lds)
52 quiet_cmd_vdsold_and_vdso_check = LD $@ !! 65 VDSO_LDFLAGS_vdso32.lds = -m elf32_sparc -soname linux-gate.so.1
53 cmd_vdsold_and_vdso_check = $(cmd_ld); $ !! 66
>> 67 #This makes sure the $(obj) subdirectory exists even though vdso32/
>> 68 #is not a kbuild sub-make subdirectory
>> 69 override obj-dirs = $(dir $(obj)) $(obj)/vdso32/
>> 70
>> 71 targets += vdso32/vdso32.lds
>> 72 targets += vdso32/vdso-note.o
>> 73 targets += vdso32/vclock_gettime.o
>> 74
>> 75 KBUILD_AFLAGS_32 := $(filter-out -m64,$(KBUILD_AFLAGS)) -DBUILD_VDSO
>> 76 $(obj)/vdso32.so.dbg: KBUILD_AFLAGS = $(KBUILD_AFLAGS_32)
>> 77 $(obj)/vdso32.so.dbg: asflags-$(CONFIG_SPARC64) += -m32
>> 78
>> 79 KBUILD_CFLAGS_32 := $(filter-out -m64,$(KBUILD_CFLAGS))
>> 80 KBUILD_CFLAGS_32 := $(filter-out -mcmodel=medlow,$(KBUILD_CFLAGS_32))
>> 81 KBUILD_CFLAGS_32 := $(filter-out -fno-pic,$(KBUILD_CFLAGS_32))
>> 82 KBUILD_CFLAGS_32 := $(filter-out $(RANDSTRUCT_CFLAGS),$(KBUILD_CFLAGS_32))
>> 83 KBUILD_CFLAGS_32 := $(filter-out $(GCC_PLUGINS_CFLAGS),$(KBUILD_CFLAGS_32))
>> 84 KBUILD_CFLAGS_32 := $(filter-out $(SPARC_REG_CFLAGS),$(KBUILD_CFLAGS_32))
>> 85 KBUILD_CFLAGS_32 += -m32 -msoft-float -fpic
>> 86 KBUILD_CFLAGS_32 += -fno-stack-protector
>> 87 KBUILD_CFLAGS_32 += $(call cc-option, -foptimize-sibling-calls)
>> 88 KBUILD_CFLAGS_32 += -fno-omit-frame-pointer
>> 89 KBUILD_CFLAGS_32 += -DDISABLE_BRANCH_PROFILING
>> 90 KBUILD_CFLAGS_32 += -mv8plus
>> 91 $(obj)/vdso32.so.dbg: KBUILD_CFLAGS = $(KBUILD_CFLAGS_32)
>> 92
>> 93 $(obj)/vdso32.so.dbg: FORCE \
>> 94 $(obj)/vdso32/vdso32.lds \
>> 95 $(obj)/vdso32/vclock_gettime.o \
>> 96 $(obj)/vdso32/vdso-note.o
>> 97 $(call if_changed,vdso)
>> 98
>> 99 #
>> 100 # The DSO images are built using a special linker script.
>> 101 #
>> 102 quiet_cmd_vdso = VDSO $@
>> 103 cmd_vdso = $(LD) -nostdlib -o $@ \
>> 104 $(VDSO_LDFLAGS) $(VDSO_LDFLAGS_$(filter %.lds,$(^F))) \
>> 105 -T $(filter %.lds,$^) $(filter %.o,$^) && \
>> 106 sh $(srctree)/$(src)/checkundef.sh '$(OBJDUMP)' '$@'
54 107
55 quiet_cmd_vdsomunge = MUNGE $@ !! 108 VDSO_LDFLAGS = -shared --hash-style=both --build-id=sha1 -Bsymbolic
56 cmd_vdsomunge = $(objtree)/$(obj)/vdsomu !! 109 GCOV_PROFILE := n
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