1 # SPDX-License-Identifier: GPL-2.0 !! 1 # SPDX-License-Identifier: GPL-2.0-only
>> 2 #
>> 3 # Building vDSO images for sparc.
>> 4 #
2 5
3 # Include the generic Makefile to check the bu !! 6 VDSO64-$(CONFIG_SPARC64) := y
4 include $(srctree)/lib/vdso/Makefile !! 7 VDSOCOMPAT-$(CONFIG_COMPAT) := y
5 8
6 hostprogs := vdsomunge !! 9 # files to link into the vdso
>> 10 vobjs-y := vdso-note.o vclock_gettime.o
7 11
8 obj-vdso := vgettimeofday.o datapage.o note.o !! 12 # files to link into kernel
>> 13 obj-y += vma.o
9 14
10 # Build rules !! 15 # vDSO images to build
11 targets := $(obj-vdso) vdso.so vdso.so.dbg vds !! 16 vdso_img-$(VDSO64-y) += 64
12 obj-vdso := $(addprefix $(obj)/, $(obj-vdso)) !! 17 vdso_img-$(VDSOCOMPAT-y) += 32
13 18
14 ccflags-y := -fPIC -fno-common -fno-builtin -f !! 19 vobjs := $(foreach F,$(vobjs-y),$(obj)/$F)
15 ccflags-y += -DDISABLE_BRANCH_PROFILING -DBUIL <<
16 20
17 ldflags-$(CONFIG_CPU_ENDIAN_BE8) := --be8 !! 21 $(obj)/vdso.o: $(obj)/vdso.so
18 ldflags-y := -Bsymbolic --no-undefined -soname <<
19 -z max-page-size=4096 -shared $(ld <<
20 --hash-style=sysv --build-id=sha1 <<
21 -T <<
22 22
23 obj-$(CONFIG_VDSO) += vdso.o !! 23 targets += vdso.lds $(vobjs-y)
24 CPPFLAGS_vdso.lds += -P -C -U$(ARCH) <<
25 24
26 CFLAGS_REMOVE_vdso.o = -pg !! 25 # Build the vDSO image C files and link them in.
>> 26 vdso_img_objs := $(vdso_img-y:%=vdso-image-%.o)
>> 27 vdso_img_cfiles := $(vdso_img-y:%=vdso-image-%.c)
>> 28 vdso_img_sodbg := $(vdso_img-y:%=vdso%.so.dbg)
>> 29 obj-y += $(vdso_img_objs)
>> 30 targets += $(vdso_img_cfiles)
>> 31 targets += $(vdso_img_sodbg) $(vdso_img-y:%=vdso%.so)
27 32
28 # Force -O2 to avoid libgcc dependencies !! 33 CPPFLAGS_vdso.lds += -P -C
29 CFLAGS_REMOVE_vgettimeofday.o = -pg -Os $(RAND <<
30 ifeq ($(c-gettimeofday-y),) <<
31 CFLAGS_vgettimeofday.o = -O2 <<
32 else <<
33 CFLAGS_vgettimeofday.o = -O2 -include $(c-gett <<
34 endif <<
35 34
36 # Force dependency !! 35 VDSO_LDFLAGS_vdso.lds = -m elf64_sparc -soname linux-vdso.so.1 --no-undefined \
37 $(obj)/vdso.o : $(obj)/vdso.so !! 36 -z max-page-size=8192
38 37
39 # Link rule for the .so file !! 38 $(obj)/vdso64.so.dbg: $(obj)/vdso.lds $(vobjs) FORCE
40 $(obj)/vdso.so.raw: $(obj)/vdso.lds $(obj-vdso !! 39 $(call if_changed,vdso)
41 $(call if_changed,vdsold_and_vdso_chec <<
42 40
43 $(obj)/vdso.so.dbg: $(obj)/vdso.so.raw $(obj)/ !! 41 HOST_EXTRACFLAGS += -I$(srctree)/tools/include
44 $(call if_changed,vdsomunge) !! 42 hostprogs += vdso2c
>> 43
>> 44 quiet_cmd_vdso2c = VDSO2C $@
>> 45 cmd_vdso2c = $(obj)/vdso2c $< $(<:%.dbg=%) $@
>> 46
>> 47 $(obj)/vdso-image-%.c: $(obj)/vdso%.so.dbg $(obj)/vdso%.so $(obj)/vdso2c FORCE
>> 48 $(call if_changed,vdso2c)
>> 49
>> 50 #
>> 51 # Don't omit frame pointers for ease of userspace debugging, but do
>> 52 # optimize sibling calls.
>> 53 #
>> 54 CFL := $(PROFILING) -mcmodel=medlow -fPIC -O2 -fasynchronous-unwind-tables -m64 \
>> 55 $(filter -g%,$(KBUILD_CFLAGS)) -fno-stack-protector \
>> 56 -fno-omit-frame-pointer -foptimize-sibling-calls \
>> 57 -DDISABLE_BRANCH_PROFILING -DBUILD_VDSO
>> 58
>> 59 SPARC_REG_CFLAGS = -ffixed-g4 -ffixed-g5 -fcall-used-g5 -fcall-used-g7
>> 60
>> 61 $(vobjs): KBUILD_CFLAGS := $(filter-out $(GCC_PLUGINS_CFLAGS) $(SPARC_REG_CFLAGS),$(KBUILD_CFLAGS)) $(CFL)
>> 62
>> 63 #
>> 64 # vDSO code runs in userspace and -pg doesn't help with profiling anyway.
>> 65 #
>> 66 CFLAGS_REMOVE_vclock_gettime.o = -pg
>> 67 CFLAGS_REMOVE_vdso32/vclock_gettime.o = -pg
45 68
46 # Strip rule for the .so file <<
47 $(obj)/%.so: OBJCOPYFLAGS := -S 69 $(obj)/%.so: OBJCOPYFLAGS := -S
48 $(obj)/%.so: $(obj)/%.so.dbg FORCE 70 $(obj)/%.so: $(obj)/%.so.dbg FORCE
49 $(call if_changed,objcopy) 71 $(call if_changed,objcopy)
50 72
51 # Actual build commands !! 73 CPPFLAGS_vdso32/vdso32.lds = $(CPPFLAGS_vdso.lds)
52 quiet_cmd_vdsold_and_vdso_check = LD $@ !! 74 VDSO_LDFLAGS_vdso32.lds = -m elf32_sparc -soname linux-gate.so.1
53 cmd_vdsold_and_vdso_check = $(cmd_ld); $ !! 75
>> 76 #This makes sure the $(obj) subdirectory exists even though vdso32/
>> 77 #is not a kbuild sub-make subdirectory
>> 78 override obj-dirs = $(dir $(obj)) $(obj)/vdso32/
>> 79
>> 80 targets += vdso32/vdso32.lds
>> 81 targets += vdso32/vdso-note.o
>> 82 targets += vdso32/vclock_gettime.o
>> 83
>> 84 KBUILD_AFLAGS_32 := $(filter-out -m64,$(KBUILD_AFLAGS)) -DBUILD_VDSO
>> 85 $(obj)/vdso32.so.dbg: KBUILD_AFLAGS = $(KBUILD_AFLAGS_32)
>> 86 $(obj)/vdso32.so.dbg: asflags-$(CONFIG_SPARC64) += -m32
>> 87
>> 88 KBUILD_CFLAGS_32 := $(filter-out -m64,$(KBUILD_CFLAGS))
>> 89 KBUILD_CFLAGS_32 := $(filter-out -mcmodel=medlow,$(KBUILD_CFLAGS_32))
>> 90 KBUILD_CFLAGS_32 := $(filter-out -fno-pic,$(KBUILD_CFLAGS_32))
>> 91 KBUILD_CFLAGS_32 := $(filter-out $(GCC_PLUGINS_CFLAGS),$(KBUILD_CFLAGS_32))
>> 92 KBUILD_CFLAGS_32 := $(filter-out $(SPARC_REG_CFLAGS),$(KBUILD_CFLAGS_32))
>> 93 KBUILD_CFLAGS_32 += -m32 -msoft-float -fpic
>> 94 KBUILD_CFLAGS_32 += -fno-stack-protector
>> 95 KBUILD_CFLAGS_32 += $(call cc-option, -foptimize-sibling-calls)
>> 96 KBUILD_CFLAGS_32 += -fno-omit-frame-pointer
>> 97 KBUILD_CFLAGS_32 += -DDISABLE_BRANCH_PROFILING
>> 98 KBUILD_CFLAGS_32 += -mv8plus
>> 99 $(obj)/vdso32.so.dbg: KBUILD_CFLAGS = $(KBUILD_CFLAGS_32)
>> 100
>> 101 $(obj)/vdso32.so.dbg: FORCE \
>> 102 $(obj)/vdso32/vdso32.lds \
>> 103 $(obj)/vdso32/vclock_gettime.o \
>> 104 $(obj)/vdso32/vdso-note.o
>> 105 $(call if_changed,vdso)
>> 106
>> 107 #
>> 108 # The DSO images are built using a special linker script.
>> 109 #
>> 110 quiet_cmd_vdso = VDSO $@
>> 111 cmd_vdso = $(LD) -nostdlib -o $@ \
>> 112 $(VDSO_LDFLAGS) $(VDSO_LDFLAGS_$(filter %.lds,$(^F))) \
>> 113 -T $(filter %.lds,$^) $(filter %.o,$^) && \
>> 114 sh $(srctree)/$(src)/checkundef.sh '$(OBJDUMP)' '$@'
>> 115
>> 116 VDSO_LDFLAGS = -shared --hash-style=both --build-id=sha1 -Bsymbolic
>> 117 GCOV_PROFILE := n
>> 118
>> 119 #
>> 120 # Install the unstripped copies of vdso*.so. If our toolchain supports
>> 121 # build-id, install .build-id links as well.
>> 122 #
>> 123 quiet_cmd_vdso_install = INSTALL $(@:install_%=%)
>> 124 define cmd_vdso_install
>> 125 cp $< "$(MODLIB)/vdso/$(@:install_%=%)"; \
>> 126 if readelf -n $< |grep -q 'Build ID'; then \
>> 127 buildid=`readelf -n $< |grep 'Build ID' |sed -e 's/^.*Build ID: \(.*\)$$/\1/'`; \
>> 128 first=`echo $$buildid | cut -b-2`; \
>> 129 last=`echo $$buildid | cut -b3-`; \
>> 130 mkdir -p "$(MODLIB)/vdso/.build-id/$$first"; \
>> 131 ln -sf "../../$(@:install_%=%)" "$(MODLIB)/vdso/.build-id/$$first/$$last.debug"; \
>> 132 fi
>> 133 endef
>> 134
>> 135 vdso_img_insttargets := $(vdso_img_sodbg:%.dbg=install_%)
>> 136
>> 137 $(MODLIB)/vdso: FORCE
>> 138 @mkdir -p $(MODLIB)/vdso
>> 139
>> 140 $(vdso_img_insttargets): install_%: $(obj)/%.dbg $(MODLIB)/vdso FORCE
>> 141 $(call cmd,vdso_install)
54 142
55 quiet_cmd_vdsomunge = MUNGE $@ !! 143 PHONY += vdso_install $(vdso_img_insttargets)
56 cmd_vdsomunge = $(objtree)/$(obj)/vdsomu !! 144 vdso_install: $(vdso_img_insttargets) FORCE
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