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 # files to link into the vdso 6 # files to link into the vdso
7 vobjs-y := vdso-note.o vclock_gettime.o 7 vobjs-y := vdso-note.o vclock_gettime.o
8 8
9 # files to link into kernel 9 # files to link into kernel
10 obj-y += vma.o 10 obj-y += vma.o
11 11
12 # vDSO images to build 12 # vDSO images to build
13 obj-$(CONFIG_SPARC64) += vdso-image- 13 obj-$(CONFIG_SPARC64) += vdso-image-64.o
14 obj-$(CONFIG_COMPAT) += vdso-image- 14 obj-$(CONFIG_COMPAT) += vdso-image-32.o
15 15
16 vobjs := $(addprefix $(obj)/, $(vobjs-y)) 16 vobjs := $(addprefix $(obj)/, $(vobjs-y))
17 17
18 $(obj)/vdso.o: $(obj)/vdso.so 18 $(obj)/vdso.o: $(obj)/vdso.so
19 19
20 targets += vdso.lds $(vobjs-y) 20 targets += vdso.lds $(vobjs-y)
21 targets += $(foreach x, 32 64, vdso-image-$(x) 21 targets += $(foreach x, 32 64, vdso-image-$(x).c vdso$(x).so vdso$(x).so.dbg)
22 22
23 CPPFLAGS_vdso.lds += -P -C 23 CPPFLAGS_vdso.lds += -P -C
24 24
25 VDSO_LDFLAGS_vdso.lds = -m elf64_sparc -soname 25 VDSO_LDFLAGS_vdso.lds = -m elf64_sparc -soname linux-vdso.so.1 --no-undefined \
26 -z max-page-size=8192 26 -z max-page-size=8192
27 27
28 $(obj)/vdso64.so.dbg: $(obj)/vdso.lds $(vobjs) 28 $(obj)/vdso64.so.dbg: $(obj)/vdso.lds $(vobjs) FORCE
29 $(call if_changed,vdso) 29 $(call if_changed,vdso)
30 30
31 HOST_EXTRACFLAGS += -I$(srctree)/tools/include 31 HOST_EXTRACFLAGS += -I$(srctree)/tools/include
32 hostprogs += vdso2c 32 hostprogs += vdso2c
33 33
34 quiet_cmd_vdso2c = VDSO2C $@ 34 quiet_cmd_vdso2c = VDSO2C $@
35 cmd_vdso2c = $(obj)/vdso2c $< $(<:%.dbg= 35 cmd_vdso2c = $(obj)/vdso2c $< $(<:%.dbg=%) $@
36 36
37 $(obj)/vdso-image-%.c: $(obj)/vdso%.so.dbg $(o 37 $(obj)/vdso-image-%.c: $(obj)/vdso%.so.dbg $(obj)/vdso%.so $(obj)/vdso2c FORCE
38 $(call if_changed,vdso2c) 38 $(call if_changed,vdso2c)
39 39
40 # 40 #
41 # Don't omit frame pointers for ease of usersp 41 # Don't omit frame pointers for ease of userspace debugging, but do
42 # optimize sibling calls. 42 # optimize sibling calls.
43 # 43 #
44 CFL := $(PROFILING) -mcmodel=medlow -fPIC -O2 44 CFL := $(PROFILING) -mcmodel=medlow -fPIC -O2 -fasynchronous-unwind-tables -m64 \
45 $(filter -g%,$(KBUILD_CFLAGS)) -fno-sta 45 $(filter -g%,$(KBUILD_CFLAGS)) -fno-stack-protector \
46 -fno-omit-frame-pointer -foptimize-sibl 46 -fno-omit-frame-pointer -foptimize-sibling-calls \
47 -DDISABLE_BRANCH_PROFILING -DBUILD_VDSO 47 -DDISABLE_BRANCH_PROFILING -DBUILD_VDSO
48 48
49 SPARC_REG_CFLAGS = -ffixed-g4 -ffixed-g5 -fcal 49 SPARC_REG_CFLAGS = -ffixed-g4 -ffixed-g5 -fcall-used-g5 -fcall-used-g7
50 50
51 $(vobjs): KBUILD_CFLAGS := $(filter-out $(RAND 51 $(vobjs): KBUILD_CFLAGS := $(filter-out $(RANDSTRUCT_CFLAGS) $(GCC_PLUGINS_CFLAGS) $(SPARC_REG_CFLAGS),$(KBUILD_CFLAGS)) $(CFL)
52 52
53 # 53 #
54 # vDSO code runs in userspace and -pg doesn't 54 # vDSO code runs in userspace and -pg doesn't help with profiling anyway.
55 # 55 #
56 CFLAGS_REMOVE_vclock_gettime.o = -pg 56 CFLAGS_REMOVE_vclock_gettime.o = -pg
57 CFLAGS_REMOVE_vdso32/vclock_gettime.o = -pg 57 CFLAGS_REMOVE_vdso32/vclock_gettime.o = -pg
58 58
59 $(obj)/%.so: OBJCOPYFLAGS := -S 59 $(obj)/%.so: OBJCOPYFLAGS := -S
60 $(obj)/%.so: $(obj)/%.so.dbg FORCE 60 $(obj)/%.so: $(obj)/%.so.dbg FORCE
61 $(call if_changed,objcopy) 61 $(call if_changed,objcopy)
62 62
63 CPPFLAGS_vdso32/vdso32.lds = $(CPPFLAGS_vdso.l 63 CPPFLAGS_vdso32/vdso32.lds = $(CPPFLAGS_vdso.lds)
64 VDSO_LDFLAGS_vdso32.lds = -m elf32_sparc -sona 64 VDSO_LDFLAGS_vdso32.lds = -m elf32_sparc -soname linux-gate.so.1
65 65
66 #This makes sure the $(obj) subdirectory exist 66 #This makes sure the $(obj) subdirectory exists even though vdso32/
67 #is not a kbuild sub-make subdirectory 67 #is not a kbuild sub-make subdirectory
68 override obj-dirs = $(dir $(obj)) $(obj)/vdso3 68 override obj-dirs = $(dir $(obj)) $(obj)/vdso32/
69 69
70 targets += vdso32/vdso32.lds 70 targets += vdso32/vdso32.lds
71 targets += vdso32/vdso-note.o 71 targets += vdso32/vdso-note.o
72 targets += vdso32/vclock_gettime.o 72 targets += vdso32/vclock_gettime.o
73 73
74 KBUILD_AFLAGS_32 := $(filter-out -m64,$(KBUILD 74 KBUILD_AFLAGS_32 := $(filter-out -m64,$(KBUILD_AFLAGS)) -DBUILD_VDSO
75 $(obj)/vdso32.so.dbg: KBUILD_AFLAGS = $(KBUILD 75 $(obj)/vdso32.so.dbg: KBUILD_AFLAGS = $(KBUILD_AFLAGS_32)
76 $(obj)/vdso32.so.dbg: asflags-$(CONFIG_SPARC64 76 $(obj)/vdso32.so.dbg: asflags-$(CONFIG_SPARC64) += -m32
77 77
78 KBUILD_CFLAGS_32 := $(filter-out -m64,$(KBUILD 78 KBUILD_CFLAGS_32 := $(filter-out -m64,$(KBUILD_CFLAGS))
79 KBUILD_CFLAGS_32 := $(filter-out -mcmodel=medl 79 KBUILD_CFLAGS_32 := $(filter-out -mcmodel=medlow,$(KBUILD_CFLAGS_32))
80 KBUILD_CFLAGS_32 := $(filter-out -fno-pic,$(KB 80 KBUILD_CFLAGS_32 := $(filter-out -fno-pic,$(KBUILD_CFLAGS_32))
81 KBUILD_CFLAGS_32 := $(filter-out $(RANDSTRUCT_ 81 KBUILD_CFLAGS_32 := $(filter-out $(RANDSTRUCT_CFLAGS),$(KBUILD_CFLAGS_32))
82 KBUILD_CFLAGS_32 := $(filter-out $(GCC_PLUGINS 82 KBUILD_CFLAGS_32 := $(filter-out $(GCC_PLUGINS_CFLAGS),$(KBUILD_CFLAGS_32))
83 KBUILD_CFLAGS_32 := $(filter-out $(SPARC_REG_C 83 KBUILD_CFLAGS_32 := $(filter-out $(SPARC_REG_CFLAGS),$(KBUILD_CFLAGS_32))
84 KBUILD_CFLAGS_32 += -m32 -msoft-float -fpic 84 KBUILD_CFLAGS_32 += -m32 -msoft-float -fpic
85 KBUILD_CFLAGS_32 += -fno-stack-protector 85 KBUILD_CFLAGS_32 += -fno-stack-protector
86 KBUILD_CFLAGS_32 += $(call cc-option, -foptimi 86 KBUILD_CFLAGS_32 += $(call cc-option, -foptimize-sibling-calls)
87 KBUILD_CFLAGS_32 += -fno-omit-frame-pointer 87 KBUILD_CFLAGS_32 += -fno-omit-frame-pointer
88 KBUILD_CFLAGS_32 += -DDISABLE_BRANCH_PROFILING 88 KBUILD_CFLAGS_32 += -DDISABLE_BRANCH_PROFILING
89 KBUILD_CFLAGS_32 += -mv8plus 89 KBUILD_CFLAGS_32 += -mv8plus
90 $(obj)/vdso32.so.dbg: KBUILD_CFLAGS = $(KBUILD 90 $(obj)/vdso32.so.dbg: KBUILD_CFLAGS = $(KBUILD_CFLAGS_32)
91 91
92 $(obj)/vdso32.so.dbg: FORCE \ 92 $(obj)/vdso32.so.dbg: FORCE \
93 $(obj)/vdso32/vdso32.l 93 $(obj)/vdso32/vdso32.lds \
94 $(obj)/vdso32/vclock_g 94 $(obj)/vdso32/vclock_gettime.o \
95 $(obj)/vdso32/vdso-not 95 $(obj)/vdso32/vdso-note.o
96 $(call if_changed,vdso) 96 $(call if_changed,vdso)
97 97
98 # 98 #
99 # The DSO images are built using a special lin 99 # The DSO images are built using a special linker script.
100 # 100 #
101 quiet_cmd_vdso = VDSO $@ 101 quiet_cmd_vdso = VDSO $@
102 cmd_vdso = $(LD) -nostdlib -o $@ \ 102 cmd_vdso = $(LD) -nostdlib -o $@ \
103 $(VDSO_LDFLAGS) $(VDSO_ 103 $(VDSO_LDFLAGS) $(VDSO_LDFLAGS_$(filter %.lds,$(^F))) \
104 -T $(filter %.lds,$^) $ 104 -T $(filter %.lds,$^) $(filter %.o,$^) && \
105 sh $(src)/checkundef.sh '$(OBJ 105 sh $(src)/checkundef.sh '$(OBJDUMP)' '$@'
106 106
107 VDSO_LDFLAGS = -shared --hash-style=both --bui 107 VDSO_LDFLAGS = -shared --hash-style=both --build-id=sha1 -Bsymbolic
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