1 # SPDX-License-Identifier: GPL-2.0-only 1 # SPDX-License-Identifier: GPL-2.0-only
2 # 2 #
3 # Building vDSO images for sparc. 3 # Building vDSO images for sparc.
4 # 4 #
5 5
>> 6 KBUILD_CFLAGS += $(DISABLE_LTO)
>> 7
>> 8 VDSO64-$(CONFIG_SPARC64) := y
>> 9 VDSOCOMPAT-$(CONFIG_COMPAT) := y
>> 10
6 # files to link into the vdso 11 # files to link into the vdso
7 vobjs-y := vdso-note.o vclock_gettime.o 12 vobjs-y := vdso-note.o vclock_gettime.o
8 13
9 # files to link into kernel 14 # files to link into kernel
10 obj-y += vma.o 15 obj-y += vma.o
11 16
12 # vDSO images to build 17 # vDSO images to build
13 obj-$(CONFIG_SPARC64) += vdso-image- !! 18 vdso_img-$(VDSO64-y) += 64
14 obj-$(CONFIG_COMPAT) += vdso-image- !! 19 vdso_img-$(VDSOCOMPAT-y) += 32
15 20
16 vobjs := $(addprefix $(obj)/, $(vobjs-y)) !! 21 vobjs := $(foreach F,$(vobjs-y),$(obj)/$F)
17 22
18 $(obj)/vdso.o: $(obj)/vdso.so 23 $(obj)/vdso.o: $(obj)/vdso.so
19 24
20 targets += vdso.lds $(vobjs-y) 25 targets += vdso.lds $(vobjs-y)
21 targets += $(foreach x, 32 64, vdso-image-$(x) !! 26
>> 27 # Build the vDSO image C files and link them in.
>> 28 vdso_img_objs := $(vdso_img-y:%=vdso-image-%.o)
>> 29 vdso_img_cfiles := $(vdso_img-y:%=vdso-image-%.c)
>> 30 vdso_img_sodbg := $(vdso_img-y:%=vdso%.so.dbg)
>> 31 obj-y += $(vdso_img_objs)
>> 32 targets += $(vdso_img_cfiles)
>> 33 targets += $(vdso_img_sodbg) $(vdso_img-y:%=vdso%.so)
22 34
23 CPPFLAGS_vdso.lds += -P -C 35 CPPFLAGS_vdso.lds += -P -C
24 36
25 VDSO_LDFLAGS_vdso.lds = -m elf64_sparc -soname 37 VDSO_LDFLAGS_vdso.lds = -m elf64_sparc -soname linux-vdso.so.1 --no-undefined \
26 -z max-page-size=8192 38 -z max-page-size=8192
27 39
28 $(obj)/vdso64.so.dbg: $(obj)/vdso.lds $(vobjs) 40 $(obj)/vdso64.so.dbg: $(obj)/vdso.lds $(vobjs) FORCE
29 $(call if_changed,vdso) 41 $(call if_changed,vdso)
30 42
31 HOST_EXTRACFLAGS += -I$(srctree)/tools/include 43 HOST_EXTRACFLAGS += -I$(srctree)/tools/include
32 hostprogs += vdso2c 44 hostprogs += vdso2c
33 45
34 quiet_cmd_vdso2c = VDSO2C $@ 46 quiet_cmd_vdso2c = VDSO2C $@
35 cmd_vdso2c = $(obj)/vdso2c $< $(<:%.dbg= 47 cmd_vdso2c = $(obj)/vdso2c $< $(<:%.dbg=%) $@
36 48
37 $(obj)/vdso-image-%.c: $(obj)/vdso%.so.dbg $(o 49 $(obj)/vdso-image-%.c: $(obj)/vdso%.so.dbg $(obj)/vdso%.so $(obj)/vdso2c FORCE
38 $(call if_changed,vdso2c) 50 $(call if_changed,vdso2c)
39 51
40 # 52 #
41 # Don't omit frame pointers for ease of usersp 53 # Don't omit frame pointers for ease of userspace debugging, but do
42 # optimize sibling calls. 54 # optimize sibling calls.
43 # 55 #
44 CFL := $(PROFILING) -mcmodel=medlow -fPIC -O2 56 CFL := $(PROFILING) -mcmodel=medlow -fPIC -O2 -fasynchronous-unwind-tables -m64 \
45 $(filter -g%,$(KBUILD_CFLAGS)) -fno-sta 57 $(filter -g%,$(KBUILD_CFLAGS)) -fno-stack-protector \
46 -fno-omit-frame-pointer -foptimize-sibl 58 -fno-omit-frame-pointer -foptimize-sibling-calls \
47 -DDISABLE_BRANCH_PROFILING -DBUILD_VDSO 59 -DDISABLE_BRANCH_PROFILING -DBUILD_VDSO
48 60
49 SPARC_REG_CFLAGS = -ffixed-g4 -ffixed-g5 -fcal 61 SPARC_REG_CFLAGS = -ffixed-g4 -ffixed-g5 -fcall-used-g5 -fcall-used-g7
50 62
51 $(vobjs): KBUILD_CFLAGS := $(filter-out $(RAND !! 63 $(vobjs): KBUILD_CFLAGS := $(filter-out $(GCC_PLUGINS_CFLAGS) $(SPARC_REG_CFLAGS),$(KBUILD_CFLAGS)) $(CFL)
52 64
53 # 65 #
54 # vDSO code runs in userspace and -pg doesn't 66 # vDSO code runs in userspace and -pg doesn't help with profiling anyway.
55 # 67 #
56 CFLAGS_REMOVE_vclock_gettime.o = -pg 68 CFLAGS_REMOVE_vclock_gettime.o = -pg
57 CFLAGS_REMOVE_vdso32/vclock_gettime.o = -pg 69 CFLAGS_REMOVE_vdso32/vclock_gettime.o = -pg
58 70
59 $(obj)/%.so: OBJCOPYFLAGS := -S 71 $(obj)/%.so: OBJCOPYFLAGS := -S
60 $(obj)/%.so: $(obj)/%.so.dbg FORCE 72 $(obj)/%.so: $(obj)/%.so.dbg FORCE
61 $(call if_changed,objcopy) 73 $(call if_changed,objcopy)
62 74
63 CPPFLAGS_vdso32/vdso32.lds = $(CPPFLAGS_vdso.l 75 CPPFLAGS_vdso32/vdso32.lds = $(CPPFLAGS_vdso.lds)
64 VDSO_LDFLAGS_vdso32.lds = -m elf32_sparc -sona 76 VDSO_LDFLAGS_vdso32.lds = -m elf32_sparc -soname linux-gate.so.1
65 77
66 #This makes sure the $(obj) subdirectory exist 78 #This makes sure the $(obj) subdirectory exists even though vdso32/
67 #is not a kbuild sub-make subdirectory 79 #is not a kbuild sub-make subdirectory
68 override obj-dirs = $(dir $(obj)) $(obj)/vdso3 80 override obj-dirs = $(dir $(obj)) $(obj)/vdso32/
69 81
70 targets += vdso32/vdso32.lds 82 targets += vdso32/vdso32.lds
71 targets += vdso32/vdso-note.o 83 targets += vdso32/vdso-note.o
72 targets += vdso32/vclock_gettime.o 84 targets += vdso32/vclock_gettime.o
73 85
74 KBUILD_AFLAGS_32 := $(filter-out -m64,$(KBUILD 86 KBUILD_AFLAGS_32 := $(filter-out -m64,$(KBUILD_AFLAGS)) -DBUILD_VDSO
75 $(obj)/vdso32.so.dbg: KBUILD_AFLAGS = $(KBUILD 87 $(obj)/vdso32.so.dbg: KBUILD_AFLAGS = $(KBUILD_AFLAGS_32)
76 $(obj)/vdso32.so.dbg: asflags-$(CONFIG_SPARC64 88 $(obj)/vdso32.so.dbg: asflags-$(CONFIG_SPARC64) += -m32
77 89
78 KBUILD_CFLAGS_32 := $(filter-out -m64,$(KBUILD 90 KBUILD_CFLAGS_32 := $(filter-out -m64,$(KBUILD_CFLAGS))
79 KBUILD_CFLAGS_32 := $(filter-out -mcmodel=medl 91 KBUILD_CFLAGS_32 := $(filter-out -mcmodel=medlow,$(KBUILD_CFLAGS_32))
80 KBUILD_CFLAGS_32 := $(filter-out -fno-pic,$(KB 92 KBUILD_CFLAGS_32 := $(filter-out -fno-pic,$(KBUILD_CFLAGS_32))
81 KBUILD_CFLAGS_32 := $(filter-out $(RANDSTRUCT_ <<
82 KBUILD_CFLAGS_32 := $(filter-out $(GCC_PLUGINS 93 KBUILD_CFLAGS_32 := $(filter-out $(GCC_PLUGINS_CFLAGS),$(KBUILD_CFLAGS_32))
83 KBUILD_CFLAGS_32 := $(filter-out $(SPARC_REG_C 94 KBUILD_CFLAGS_32 := $(filter-out $(SPARC_REG_CFLAGS),$(KBUILD_CFLAGS_32))
84 KBUILD_CFLAGS_32 += -m32 -msoft-float -fpic 95 KBUILD_CFLAGS_32 += -m32 -msoft-float -fpic
85 KBUILD_CFLAGS_32 += -fno-stack-protector 96 KBUILD_CFLAGS_32 += -fno-stack-protector
86 KBUILD_CFLAGS_32 += $(call cc-option, -foptimi 97 KBUILD_CFLAGS_32 += $(call cc-option, -foptimize-sibling-calls)
87 KBUILD_CFLAGS_32 += -fno-omit-frame-pointer 98 KBUILD_CFLAGS_32 += -fno-omit-frame-pointer
88 KBUILD_CFLAGS_32 += -DDISABLE_BRANCH_PROFILING 99 KBUILD_CFLAGS_32 += -DDISABLE_BRANCH_PROFILING
89 KBUILD_CFLAGS_32 += -mv8plus 100 KBUILD_CFLAGS_32 += -mv8plus
90 $(obj)/vdso32.so.dbg: KBUILD_CFLAGS = $(KBUILD 101 $(obj)/vdso32.so.dbg: KBUILD_CFLAGS = $(KBUILD_CFLAGS_32)
91 102
92 $(obj)/vdso32.so.dbg: FORCE \ 103 $(obj)/vdso32.so.dbg: FORCE \
93 $(obj)/vdso32/vdso32.l 104 $(obj)/vdso32/vdso32.lds \
94 $(obj)/vdso32/vclock_g 105 $(obj)/vdso32/vclock_gettime.o \
95 $(obj)/vdso32/vdso-not 106 $(obj)/vdso32/vdso-note.o
96 $(call if_changed,vdso) 107 $(call if_changed,vdso)
97 108
98 # 109 #
99 # The DSO images are built using a special lin 110 # The DSO images are built using a special linker script.
100 # 111 #
101 quiet_cmd_vdso = VDSO $@ 112 quiet_cmd_vdso = VDSO $@
102 cmd_vdso = $(LD) -nostdlib -o $@ \ 113 cmd_vdso = $(LD) -nostdlib -o $@ \
103 $(VDSO_LDFLAGS) $(VDSO_ 114 $(VDSO_LDFLAGS) $(VDSO_LDFLAGS_$(filter %.lds,$(^F))) \
104 -T $(filter %.lds,$^) $ 115 -T $(filter %.lds,$^) $(filter %.o,$^) && \
105 sh $(src)/checkundef.sh '$(OBJ !! 116 sh $(srctree)/$(src)/checkundef.sh '$(OBJDUMP)' '$@'
106 117
107 VDSO_LDFLAGS = -shared --hash-style=both --bui 118 VDSO_LDFLAGS = -shared --hash-style=both --build-id=sha1 -Bsymbolic
>> 119 GCOV_PROFILE := n
>> 120
>> 121 #
>> 122 # Install the unstripped copies of vdso*.so. If our toolchain supports
>> 123 # build-id, install .build-id links as well.
>> 124 #
>> 125 quiet_cmd_vdso_install = INSTALL $(@:install_%=%)
>> 126 define cmd_vdso_install
>> 127 cp $< "$(MODLIB)/vdso/$(@:install_%=%)"; \
>> 128 if readelf -n $< |grep -q 'Build ID'; then \
>> 129 buildid=`readelf -n $< |grep 'Build ID' |sed -e 's/^.*Build ID: \(.*\)$$/\1/'`; \
>> 130 first=`echo $$buildid | cut -b-2`; \
>> 131 last=`echo $$buildid | cut -b3-`; \
>> 132 mkdir -p "$(MODLIB)/vdso/.build-id/$$first"; \
>> 133 ln -sf "../../$(@:install_%=%)" "$(MODLIB)/vdso/.build-id/$$first/$$last.debug"; \
>> 134 fi
>> 135 endef
>> 136
>> 137 vdso_img_insttargets := $(vdso_img_sodbg:%.dbg=install_%)
>> 138
>> 139 $(MODLIB)/vdso: FORCE
>> 140 @mkdir -p $(MODLIB)/vdso
>> 141
>> 142 $(vdso_img_insttargets): install_%: $(obj)/%.dbg $(MODLIB)/vdso FORCE
>> 143 $(call cmd,vdso_install)
>> 144
>> 145 PHONY += vdso_install $(vdso_img_insttargets)
>> 146 vdso_install: $(vdso_img_insttargets) FORCE
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