1 # SPDX-License-Identifier: GPL-2.0 <<
2 # Objects to go into the VDSO. <<
3 <<
4 # Include the generic Makefile to check the bu <<
5 include $(srctree)/lib/vdso/Makefile <<
6 <<
7 obj-vdso-y := elf.o vgettimeofday.o sigreturn. <<
8 <<
9 # Common compiler flags between ABIs. <<
10 ccflags-vdso := \ <<
11 $(filter -I%,$(KBUILD_CFLAGS)) \ <<
12 $(filter -E%,$(KBUILD_CFLAGS)) \ <<
13 $(filter -mmicromips,$(KBUILD_CFLAGS)) <<
14 $(filter -march=%,$(KBUILD_CFLAGS)) \ <<
15 $(filter -m%-float,$(KBUILD_CFLAGS)) \ <<
16 $(filter -mno-loongson-%,$(KBUILD_CFLA <<
17 $(CLANG_FLAGS) \ <<
18 -D__VDSO__ <<
19 <<
20 ifndef CONFIG_64BIT <<
21 ccflags-vdso += -DBUILD_VDSO32 <<
22 endif <<
23 <<
24 # <<
25 # The -fno-jump-tables flag only prevents the <<
26 # jump tables but does not prevent the compile <<
27 # offsets. <<
28 cflags-vdso := $(ccflags-vdso) \ <<
29 $(filter -W%,$(filter-out -Wa$(comma)% <<
30 -O3 -g -fPIC -fno-strict-aliasing -fno <<
31 -mrelax-pic-calls $(call cc-option, -m <<
32 -fno-stack-protector -fno-jump-tables <<
33 $(call cc-option, -fno-asynchronous-un <<
34 aflags-vdso := $(ccflags-vdso) \ <<
35 -D__ASSEMBLY__ -Wa,-gdwarf-2 <<
36 <<
37 ifneq ($(c-gettimeofday-y),) <<
38 CFLAGS_vgettimeofday.o = -include $(c-gettimeo <<
39 <<
40 # config-n32-o32-env.c prepares the environmen <<
41 # library on a 64bit kernel. <<
42 # Note: Needs to be included before than the g <<
43 CFLAGS_vgettimeofday-o32.o = -include $(src)/c <<
44 CFLAGS_vgettimeofday-n32.o = -include $(src)/c <<
45 endif <<
46 <<
47 CFLAGS_REMOVE_vgettimeofday.o = $(CC_FLAGS_FTR <<
48 <<
49 ifdef CONFIG_MIPS_DISABLE_VDSO <<
50 obj-vdso-y := $(filter-out vgettimeofday.o, <<
51 endif <<
52 <<
53 # VDSO linker flags. <<
54 ldflags-y := -Bsymbolic --no-undefined -soname <<
55 $(filter -E%,$(KBUILD_CFLAGS)) -shared <<
56 -G 0 --eh-frame-hdr --hash-style=sysv <<
57 <<
58 CFLAGS_REMOVE_vdso.o = $(CC_FLAGS_FTRACE) <<
59 <<
60 # Check that we don't have PIC 'jalr t9' calls <<
61 quiet_cmd_vdso_mips_check = VDSOCHK $@ <<
62 cmd_vdso_mips_check = if $(OBJDUMP) --di <<
63 then (echo >&2 "$@: PIC <<
64 rm -f $@; /bin/fa <<
65 <<
66 # <<
67 # Shared build commands. <<
68 # <<
69 <<
70 quiet_cmd_vdsold_and_vdso_check = LD $@ <<
71 cmd_vdsold_and_vdso_check = $(cmd_ld); $ <<
72 <<
73 quiet_cmd_vdsoas_o_S = AS $@ <<
74 cmd_vdsoas_o_S = $(CC) $(a_flags) -c -o <<
75 <<
76 # Strip rule for the raw .so files <<
77 $(obj)/%.so.raw: OBJCOPYFLAGS := -S <<
78 $(obj)/%.so.raw: $(obj)/%.so.dbg.raw FORCE <<
79 $(call if_changed,objcopy) <<
80 <<
81 hostprogs := genvdso <<
82 <<
83 quiet_cmd_genvdso = GENVDSO $@ <<
84 define cmd_genvdso <<
85 $(foreach file,$(filter %.raw,$^),cp $ <<
86 $(obj)/genvdso $(<:%.raw=%) $(<:%.dbg. <<
87 endef <<
88 <<
89 # 1 #
90 # Build native VDSO. !! 2 # Building vDSO images for sparc.
91 # 3 #
92 4
93 native-abi := $(filter -mabi=%,$(KBUILD_CFLAGS !! 5 KBUILD_CFLAGS += $(DISABLE_LTO)
94 <<
95 targets += $(obj-vdso-y) <<
96 targets += vdso.lds <<
97 targets += vdso.so.dbg.raw vdso.so.raw <<
98 targets += vdso.so.dbg vdso.so <<
99 targets += vdso-image.c <<
100 6
101 obj-vdso := $(obj-vdso-y:%.o=$(obj)/%.o) !! 7 VDSO64-$(CONFIG_SPARC64) := y
>> 8 VDSOCOMPAT-$(CONFIG_COMPAT) := y
102 9
103 $(obj-vdso): KBUILD_CFLAGS := $(cflags-vdso) $ !! 10 # files to link into the vdso
104 $(obj-vdso): KBUILD_AFLAGS := $(aflags-vdso) $ !! 11 vobjs-y := vdso-note.o vclock_gettime.o
105 12
106 $(obj)/vdso.lds: KBUILD_CPPFLAGS := $(ccflags- !! 13 # files to link into kernel
>> 14 obj-y += vma.o
107 15
108 $(obj)/vdso.so.dbg.raw: $(obj)/vdso.lds $(obj- !! 16 # vDSO images to build
109 $(call if_changed,vdsold_and_vdso_chec !! 17 vdso_img-$(VDSO64-y) += 64
>> 18 vdso_img-$(VDSOCOMPAT-y) += 32
110 19
111 $(obj)/vdso-image.c: $(obj)/vdso.so.dbg.raw $( !! 20 vobjs := $(foreach F,$(vobjs-y),$(obj)/$F)
112 $(obj)/genvdso FORCE <<
113 $(call if_changed,genvdso) <<
114 21
115 obj-y += vdso-image.o !! 22 $(obj)/vdso.o: $(obj)/vdso.so
116 <<
117 # <<
118 # Build O32 VDSO. <<
119 # <<
120 23
121 # Define these outside the ifdef to ensure the !! 24 targets += vdso.lds $(vobjs-y)
122 targets += $(obj-vdso-y:%.o=%-o32.o) <<
123 targets += vdso-o32.lds <<
124 targets += vdso-o32.so.dbg.raw vdso-o32.so.raw <<
125 targets += vdso-o32.so.dbg vdso-o32.so <<
126 targets += vdso-o32-image.c <<
127 25
128 ifdef CONFIG_MIPS32_O32 !! 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)
>> 33 .SECONDARY: $(vdso_img-y:%=$(obj)/vdso-image-%.c) \
>> 34 $(vdso_img-y:%=$(obj)/vdso%.so)
129 35
130 obj-vdso-o32 := $(obj-vdso-y:%.o=$(obj)/%-o32. !! 36 export CPPFLAGS_vdso.lds += -P -C
131 37
132 $(obj-vdso-o32): KBUILD_CFLAGS := $(cflags-vds !! 38 VDSO_LDFLAGS_vdso.lds = -m64 -Wl,-soname=linux-vdso.so.1 \
133 $(obj-vdso-o32): KBUILD_AFLAGS := $(aflags-vds !! 39 -Wl,--no-undefined \
>> 40 -Wl,-z,max-page-size=8192 -Wl,-z,common-page-size=8192 \
>> 41 $(DISABLE_LTO)
134 42
135 $(obj)/%-o32.o: $(src)/%.S FORCE !! 43 $(obj)/vdso64.so.dbg: $(src)/vdso.lds $(vobjs) FORCE
136 $(call if_changed_dep,vdsoas_o_S) !! 44 $(call if_changed,vdso)
137 45
138 $(obj)/%-o32.o: $(src)/%.c FORCE !! 46 HOST_EXTRACFLAGS += -I$(srctree)/tools/include
139 $(call cmd,force_checksrc) !! 47 hostprogs-y += vdso2c
140 $(call if_changed_rule,cc_o_c) <<
141 48
142 $(obj)/vdso-o32.lds: KBUILD_CPPFLAGS := $(ccfl !! 49 quiet_cmd_vdso2c = VDSO2C $@
143 $(obj)/vdso-o32.lds: $(src)/vdso.lds.S FORCE !! 50 define cmd_vdso2c
144 $(call if_changed_dep,cpp_lds_S) !! 51 $(obj)/vdso2c $< $(<:%.dbg=%) $@
145 !! 52 endef
146 $(obj)/vdso-o32.so.dbg.raw: $(obj)/vdso-o32.ld <<
147 $(call if_changed,vdsold_and_vdso_chec <<
148 <<
149 $(obj)/vdso-o32-image.c: VDSO_NAME := o32 <<
150 $(obj)/vdso-o32-image.c: $(obj)/vdso-o32.so.db <<
151 $(obj)/genvdso FORCE <<
152 $(call if_changed,genvdso) <<
153 <<
154 obj-y += vdso-o32-image.o <<
155 53
156 endif !! 54 $(obj)/vdso-image-%.c: $(obj)/vdso%.so.dbg $(obj)/vdso%.so $(obj)/vdso2c FORCE
>> 55 $(call if_changed,vdso2c)
157 56
158 # 57 #
159 # Build N32 VDSO. !! 58 # Don't omit frame pointers for ease of userspace debugging, but do
>> 59 # optimize sibling calls.
160 # 60 #
>> 61 CFL := $(PROFILING) -mcmodel=medlow -fPIC -O2 -fasynchronous-unwind-tables \
>> 62 -m64 -ffixed-g2 -ffixed-g3 -fcall-used-g4 -fcall-used-g5 -ffixed-g6 \
>> 63 -ffixed-g7 $(filter -g%,$(KBUILD_CFLAGS)) \
>> 64 $(call cc-option, -fno-stack-protector) -fno-omit-frame-pointer \
>> 65 -foptimize-sibling-calls -DBUILD_VDSO
161 66
162 targets += $(obj-vdso-y:%.o=%-n32.o) !! 67 $(vobjs): KBUILD_CFLAGS += $(CFL)
163 targets += vdso-n32.lds <<
164 targets += vdso-n32.so.dbg.raw vdso-n32.so.raw <<
165 targets += vdso-n32.so.dbg vdso-n32.so <<
166 targets += vdso-n32-image.c <<
167 <<
168 ifdef CONFIG_MIPS32_N32 <<
169 <<
170 obj-vdso-n32 := $(obj-vdso-y:%.o=$(obj)/%-n32. <<
171 68
172 $(obj-vdso-n32): KBUILD_CFLAGS := $(cflags-vds !! 69 #
173 $(obj-vdso-n32): KBUILD_AFLAGS := $(aflags-vds !! 70 # vDSO code runs in userspace and -pg doesn't help with profiling anyway.
174 !! 71 #
175 $(obj)/%-n32.o: $(src)/%.S FORCE !! 72 CFLAGS_REMOVE_vdso-note.o = -pg
176 $(call if_changed_dep,vdsoas_o_S) !! 73 CFLAGS_REMOVE_vclock_gettime.o = -pg
177 74
178 $(obj)/%-n32.o: $(src)/%.c FORCE !! 75 $(obj)/%.so: OBJCOPYFLAGS := -S
179 $(call cmd,force_checksrc) !! 76 $(obj)/%.so: $(obj)/%.so.dbg
180 $(call if_changed_rule,cc_o_c) !! 77 $(call if_changed,objcopy)
181 78
182 $(obj)/vdso-n32.lds: KBUILD_CPPFLAGS := $(ccfl !! 79 CPPFLAGS_vdso32.lds = $(CPPFLAGS_vdso.lds)
183 $(obj)/vdso-n32.lds: $(src)/vdso.lds.S FORCE !! 80 VDSO_LDFLAGS_vdso32.lds = -m32 -Wl,-m,elf32_sparc,-soname=linux-gate.so.1
184 $(call if_changed_dep,cpp_lds_S) <<
185 81
186 $(obj)/vdso-n32.so.dbg.raw: $(obj)/vdso-n32.ld !! 82 #This makes sure the $(obj) subdirectory exists even though vdso32/
187 $(call if_changed,vdsold_and_vdso_chec !! 83 #is not a kbuild sub-make subdirectory
>> 84 override obj-dirs = $(dir $(obj)) $(obj)/vdso32/
>> 85
>> 86 targets += vdso32/vdso32.lds
>> 87 targets += vdso32/vdso-note.o
>> 88 targets += vdso32/vclock_gettime.o
>> 89
>> 90 KBUILD_AFLAGS_32 := $(filter-out -m64,$(KBUILD_AFLAGS)) -DBUILD_VDSO
>> 91 $(obj)/vdso32.so.dbg: KBUILD_AFLAGS = $(KBUILD_AFLAGS_32)
>> 92 $(obj)/vdso32.so.dbg: asflags-$(CONFIG_SPARC64) += -m32
>> 93
>> 94 KBUILD_CFLAGS_32 := $(filter-out -m64,$(KBUILD_CFLAGS))
>> 95 KBUILD_CFLAGS_32 := $(filter-out -mcmodel=medlow,$(KBUILD_CFLAGS_32))
>> 96 KBUILD_CFLAGS_32 := $(filter-out -fno-pic,$(KBUILD_CFLAGS_32))
>> 97 KBUILD_CFLAGS_32 := $(filter-out $(GCC_PLUGINS_CFLAGS),$(KBUILD_CFLAGS_32))
>> 98 KBUILD_CFLAGS_32 += -m32 -msoft-float -fpic -mno-app-regs -ffixed-g7
>> 99 KBUILD_CFLAGS_32 += $(call cc-option, -fno-stack-protector)
>> 100 KBUILD_CFLAGS_32 += $(call cc-option, -foptimize-sibling-calls)
>> 101 KBUILD_CFLAGS_32 += -fno-omit-frame-pointer
>> 102 KBUILD_CFLAGS_32 += -DDISABLE_BRANCH_PROFILING
>> 103 KBUILD_CFLAGS_32 += -mv8plus
>> 104 $(obj)/vdso32.so.dbg: KBUILD_CFLAGS = $(KBUILD_CFLAGS_32)
>> 105
>> 106 $(obj)/vdso32.so.dbg: FORCE \
>> 107 $(obj)/vdso32/vdso32.lds \
>> 108 $(obj)/vdso32/vclock_gettime.o \
>> 109 $(obj)/vdso32/vdso-note.o
>> 110 $(call if_changed,vdso)
>> 111
>> 112 #
>> 113 # The DSO images are built using a special linker script.
>> 114 #
>> 115 quiet_cmd_vdso = VDSO $@
>> 116 cmd_vdso = $(CC) -nostdlib -o $@ \
>> 117 $(VDSO_LDFLAGS) $(VDSO_LDFLAGS_$(filter %.lds,$(^F))) \
>> 118 -Wl,-T,$(filter %.lds,$^) $(filter %.o,$^)
>> 119
>> 120 VDSO_LDFLAGS = -fPIC -shared $(call cc-ldoption, -Wl$(comma)--hash-style=sysv) \
>> 121 $(call cc-ldoption, -Wl$(comma)--build-id) -Wl,-Bsymbolic
>> 122 GCOV_PROFILE := n
>> 123
>> 124 #
>> 125 # Install the unstripped copies of vdso*.so. If our toolchain supports
>> 126 # build-id, install .build-id links as well.
>> 127 #
>> 128 quiet_cmd_vdso_install = INSTALL $(@:install_%=%)
>> 129 define cmd_vdso_install
>> 130 cp $< "$(MODLIB)/vdso/$(@:install_%=%)"; \
>> 131 if readelf -n $< |grep -q 'Build ID'; then \
>> 132 buildid=`readelf -n $< |grep 'Build ID' |sed -e 's/^.*Build ID: \(.*\)$$/\1/'`; \
>> 133 first=`echo $$buildid | cut -b-2`; \
>> 134 last=`echo $$buildid | cut -b3-`; \
>> 135 mkdir -p "$(MODLIB)/vdso/.build-id/$$first"; \
>> 136 ln -sf "../../$(@:install_%=%)" "$(MODLIB)/vdso/.build-id/$$first/$$last.debug"; \
>> 137 fi
>> 138 endef
188 139
189 $(obj)/vdso-n32-image.c: VDSO_NAME := n32 !! 140 vdso_img_insttargets := $(vdso_img_sodbg:%.dbg=install_%)
190 $(obj)/vdso-n32-image.c: $(obj)/vdso-n32.so.db <<
191 $(obj)/genvdso FORCE <<
192 $(call if_changed,genvdso) <<
193 141
194 obj-y += vdso-n32-image.o !! 142 $(MODLIB)/vdso: FORCE
>> 143 @mkdir -p $(MODLIB)/vdso
195 144
196 endif !! 145 $(vdso_img_insttargets): install_%: $(obj)/%.dbg $(MODLIB)/vdso FORCE
>> 146 $(call cmd,vdso_install)
197 147
198 # FIXME: Need install rule for debug. !! 148 PHONY += vdso_install $(vdso_img_insttargets)
199 # Needs to deal with dependency for generation !! 149 vdso_install: $(vdso_img_insttargets) FORCE
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