1 # SPDX-License-Identifier: GPL-2.0-only <<
2 # 1 #
3 # Building vDSO images for sparc. 2 # Building vDSO images for sparc.
4 # 3 #
5 4
>> 5 KBUILD_CFLAGS += $(DISABLE_LTO)
>> 6
>> 7 VDSO64-$(CONFIG_SPARC64) := y
>> 8 VDSOCOMPAT-$(CONFIG_COMPAT) := y
>> 9
6 # files to link into the vdso 10 # files to link into the vdso
7 vobjs-y := vdso-note.o vclock_gettime.o 11 vobjs-y := vdso-note.o vclock_gettime.o
8 12
9 # files to link into kernel 13 # files to link into kernel
10 obj-y += vma.o 14 obj-y += vma.o
11 15
12 # vDSO images to build 16 # vDSO images to build
13 obj-$(CONFIG_SPARC64) += vdso-image- !! 17 vdso_img-$(VDSO64-y) += 64
14 obj-$(CONFIG_COMPAT) += vdso-image- !! 18 vdso_img-$(VDSOCOMPAT-y) += 32
15 19
16 vobjs := $(addprefix $(obj)/, $(vobjs-y)) !! 20 vobjs := $(foreach F,$(vobjs-y),$(obj)/$F)
17 21
18 $(obj)/vdso.o: $(obj)/vdso.so 22 $(obj)/vdso.o: $(obj)/vdso.so
19 23
20 targets += vdso.lds $(vobjs-y) 24 targets += vdso.lds $(vobjs-y)
21 targets += $(foreach x, 32 64, vdso-image-$(x) !! 25
>> 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) $(vdso_img-y:%=vdso%.so)
22 33
23 CPPFLAGS_vdso.lds += -P -C 34 CPPFLAGS_vdso.lds += -P -C
24 35
25 VDSO_LDFLAGS_vdso.lds = -m elf64_sparc -soname !! 36 VDSO_LDFLAGS_vdso.lds = -m64 -Wl,-soname=linux-vdso.so.1 \
26 -z max-page-size=8192 !! 37 -Wl,--no-undefined \
>> 38 -Wl,-z,max-page-size=8192 -Wl,-z,common-page-size=8192 \
>> 39 $(DISABLE_LTO)
27 40
28 $(obj)/vdso64.so.dbg: $(obj)/vdso.lds $(vobjs) 41 $(obj)/vdso64.so.dbg: $(obj)/vdso.lds $(vobjs) FORCE
29 $(call if_changed,vdso) 42 $(call if_changed,vdso)
30 43
31 HOST_EXTRACFLAGS += -I$(srctree)/tools/include 44 HOST_EXTRACFLAGS += -I$(srctree)/tools/include
32 hostprogs += vdso2c !! 45 hostprogs-y += vdso2c
33 46
34 quiet_cmd_vdso2c = VDSO2C $@ 47 quiet_cmd_vdso2c = VDSO2C $@
35 cmd_vdso2c = $(obj)/vdso2c $< $(<:%.dbg= 48 cmd_vdso2c = $(obj)/vdso2c $< $(<:%.dbg=%) $@
36 49
37 $(obj)/vdso-image-%.c: $(obj)/vdso%.so.dbg $(o 50 $(obj)/vdso-image-%.c: $(obj)/vdso%.so.dbg $(obj)/vdso%.so $(obj)/vdso2c FORCE
38 $(call if_changed,vdso2c) 51 $(call if_changed,vdso2c)
39 52
40 # 53 #
41 # Don't omit frame pointers for ease of usersp 54 # Don't omit frame pointers for ease of userspace debugging, but do
42 # optimize sibling calls. 55 # optimize sibling calls.
43 # 56 #
44 CFL := $(PROFILING) -mcmodel=medlow -fPIC -O2 !! 57 CFL := $(PROFILING) -mcmodel=medlow -fPIC -O2 -fasynchronous-unwind-tables \
45 $(filter -g%,$(KBUILD_CFLAGS)) -fno-sta !! 58 -m64 -ffixed-g2 -ffixed-g3 -fcall-used-g4 -fcall-used-g5 -ffixed-g6 \
46 -fno-omit-frame-pointer -foptimize-sibl !! 59 -ffixed-g7 $(filter -g%,$(KBUILD_CFLAGS)) \
47 -DDISABLE_BRANCH_PROFILING -DBUILD_VDSO !! 60 $(call cc-option, -fno-stack-protector) -fno-omit-frame-pointer \
48 !! 61 -foptimize-sibling-calls -DBUILD_VDSO
49 SPARC_REG_CFLAGS = -ffixed-g4 -ffixed-g5 -fcal <<
50 62
51 $(vobjs): KBUILD_CFLAGS := $(filter-out $(RAND !! 63 $(vobjs): 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 #
>> 68 CFLAGS_REMOVE_vdso-note.o = -pg
56 CFLAGS_REMOVE_vclock_gettime.o = -pg 69 CFLAGS_REMOVE_vclock_gettime.o = -pg
57 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
61 $(call if_changed,objcopy) 73 $(call if_changed,objcopy)
62 74
63 CPPFLAGS_vdso32/vdso32.lds = $(CPPFLAGS_vdso.l !! 75 CPPFLAGS_vdso32.lds = $(CPPFLAGS_vdso.lds)
64 VDSO_LDFLAGS_vdso32.lds = -m elf32_sparc -sona !! 76 VDSO_LDFLAGS_vdso32.lds = -m32 -Wl,-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 += -m32 -msoft-float -fpic -mno-app-regs -ffixed-g7
84 KBUILD_CFLAGS_32 += -m32 -msoft-float -fpic !! 95 KBUILD_CFLAGS_32 += $(call cc-option, -fno-stack-protector)
85 KBUILD_CFLAGS_32 += -fno-stack-protector <<
86 KBUILD_CFLAGS_32 += $(call cc-option, -foptimi 96 KBUILD_CFLAGS_32 += $(call cc-option, -foptimize-sibling-calls)
87 KBUILD_CFLAGS_32 += -fno-omit-frame-pointer 97 KBUILD_CFLAGS_32 += -fno-omit-frame-pointer
88 KBUILD_CFLAGS_32 += -DDISABLE_BRANCH_PROFILING 98 KBUILD_CFLAGS_32 += -DDISABLE_BRANCH_PROFILING
89 KBUILD_CFLAGS_32 += -mv8plus 99 KBUILD_CFLAGS_32 += -mv8plus
90 $(obj)/vdso32.so.dbg: KBUILD_CFLAGS = $(KBUILD 100 $(obj)/vdso32.so.dbg: KBUILD_CFLAGS = $(KBUILD_CFLAGS_32)
91 101
92 $(obj)/vdso32.so.dbg: FORCE \ 102 $(obj)/vdso32.so.dbg: FORCE \
93 $(obj)/vdso32/vdso32.l 103 $(obj)/vdso32/vdso32.lds \
94 $(obj)/vdso32/vclock_g 104 $(obj)/vdso32/vclock_gettime.o \
95 $(obj)/vdso32/vdso-not 105 $(obj)/vdso32/vdso-note.o
96 $(call if_changed,vdso) 106 $(call if_changed,vdso)
97 107
98 # 108 #
99 # The DSO images are built using a special lin 109 # The DSO images are built using a special linker script.
100 # 110 #
101 quiet_cmd_vdso = VDSO $@ 111 quiet_cmd_vdso = VDSO $@
102 cmd_vdso = $(LD) -nostdlib -o $@ \ !! 112 cmd_vdso = $(CC) -nostdlib -o $@ \
103 $(VDSO_LDFLAGS) $(VDSO_ 113 $(VDSO_LDFLAGS) $(VDSO_LDFLAGS_$(filter %.lds,$(^F))) \
104 -T $(filter %.lds,$^) $ !! 114 -Wl,-T,$(filter %.lds,$^) $(filter %.o,$^)
105 sh $(src)/checkundef.sh '$(OBJ !! 115
>> 116 VDSO_LDFLAGS = -fPIC -shared $(call cc-ldoption, -Wl$(comma)--hash-style=sysv) \
>> 117 $(call cc-ldoption, -Wl$(comma)--build-id) -Wl,-Bsymbolic
>> 118 GCOV_PROFILE := n
>> 119
>> 120 #
>> 121 # Install the unstripped copies of vdso*.so. If our toolchain supports
>> 122 # build-id, install .build-id links as well.
>> 123 #
>> 124 quiet_cmd_vdso_install = INSTALL $(@:install_%=%)
>> 125 define cmd_vdso_install
>> 126 cp $< "$(MODLIB)/vdso/$(@:install_%=%)"; \
>> 127 if readelf -n $< |grep -q 'Build ID'; then \
>> 128 buildid=`readelf -n $< |grep 'Build ID' |sed -e 's/^.*Build ID: \(.*\)$$/\1/'`; \
>> 129 first=`echo $$buildid | cut -b-2`; \
>> 130 last=`echo $$buildid | cut -b3-`; \
>> 131 mkdir -p "$(MODLIB)/vdso/.build-id/$$first"; \
>> 132 ln -sf "../../$(@:install_%=%)" "$(MODLIB)/vdso/.build-id/$$first/$$last.debug"; \
>> 133 fi
>> 134 endef
>> 135
>> 136 vdso_img_insttargets := $(vdso_img_sodbg:%.dbg=install_%)
>> 137
>> 138 $(MODLIB)/vdso: FORCE
>> 139 @mkdir -p $(MODLIB)/vdso
>> 140
>> 141 $(vdso_img_insttargets): install_%: $(obj)/%.dbg $(MODLIB)/vdso FORCE
>> 142 $(call cmd,vdso_install)
106 143
107 VDSO_LDFLAGS = -shared --hash-style=both --bui !! 144 PHONY += vdso_install $(vdso_img_insttargets)
>> 145 vdso_install: $(vdso_img_insttargets) FORCE
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.