Commit | Line | Data |
---|---|---|
9a08862a NM |
1 | # |
2 | # Building vDSO images for sparc. | |
3 | # | |
4 | ||
5 | KBUILD_CFLAGS += $(DISABLE_LTO) | |
6 | ||
7 | VDSO64-$(CONFIG_SPARC64) := y | |
8 | VDSOCOMPAT-$(CONFIG_COMPAT) := y | |
9 | ||
10 | # files to link into the vdso | |
11 | vobjs-y := vdso-note.o vclock_gettime.o | |
12 | ||
13 | # files to link into kernel | |
14 | obj-y += vma.o | |
15 | ||
16 | # vDSO images to build | |
17 | vdso_img-$(VDSO64-y) += 64 | |
18 | vdso_img-$(VDSOCOMPAT-y) += 32 | |
19 | ||
20 | vobjs := $(foreach F,$(vobjs-y),$(obj)/$F) | |
21 | ||
22 | $(obj)/vdso.o: $(obj)/vdso.so | |
23 | ||
24 | targets += vdso.lds $(vobjs-y) | |
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) | |
54a702f7 | 32 | targets += $(vdso_img_sodbg) $(vdso_img-y:%=vdso%.so) |
9a08862a | 33 | |
8cf7765d | 34 | CPPFLAGS_vdso.lds += -P -C |
9a08862a NM |
35 | |
36 | VDSO_LDFLAGS_vdso.lds = -m64 -Wl,-soname=linux-vdso.so.1 \ | |
37 | -Wl,--no-undefined \ | |
38 | -Wl,-z,max-page-size=8192 -Wl,-z,common-page-size=8192 \ | |
39 | $(DISABLE_LTO) | |
40 | ||
8cf7765d | 41 | $(obj)/vdso64.so.dbg: $(obj)/vdso.lds $(vobjs) FORCE |
9a08862a NM |
42 | $(call if_changed,vdso) |
43 | ||
44 | HOST_EXTRACFLAGS += -I$(srctree)/tools/include | |
45 | hostprogs-y += vdso2c | |
46 | ||
47 | quiet_cmd_vdso2c = VDSO2C $@ | |
8cf7765d | 48 | cmd_vdso2c = $(obj)/vdso2c $< $(<:%.dbg=%) $@ |
9a08862a NM |
49 | |
50 | $(obj)/vdso-image-%.c: $(obj)/vdso%.so.dbg $(obj)/vdso%.so $(obj)/vdso2c FORCE | |
51 | $(call if_changed,vdso2c) | |
52 | ||
53 | # | |
54 | # Don't omit frame pointers for ease of userspace debugging, but do | |
55 | # optimize sibling calls. | |
56 | # | |
57 | CFL := $(PROFILING) -mcmodel=medlow -fPIC -O2 -fasynchronous-unwind-tables \ | |
58 | -m64 -ffixed-g2 -ffixed-g3 -fcall-used-g4 -fcall-used-g5 -ffixed-g6 \ | |
59 | -ffixed-g7 $(filter -g%,$(KBUILD_CFLAGS)) \ | |
60 | $(call cc-option, -fno-stack-protector) -fno-omit-frame-pointer \ | |
61 | -foptimize-sibling-calls -DBUILD_VDSO | |
62 | ||
63 | $(vobjs): KBUILD_CFLAGS += $(CFL) | |
64 | ||
65 | # | |
66 | # vDSO code runs in userspace and -pg doesn't help with profiling anyway. | |
67 | # | |
68 | CFLAGS_REMOVE_vdso-note.o = -pg | |
69 | CFLAGS_REMOVE_vclock_gettime.o = -pg | |
70 | ||
71 | $(obj)/%.so: OBJCOPYFLAGS := -S | |
72 | $(obj)/%.so: $(obj)/%.so.dbg | |
73 | $(call if_changed,objcopy) | |
74 | ||
75 | CPPFLAGS_vdso32.lds = $(CPPFLAGS_vdso.lds) | |
76 | VDSO_LDFLAGS_vdso32.lds = -m32 -Wl,-m,elf32_sparc,-soname=linux-gate.so.1 | |
77 | ||
78 | #This makes sure the $(obj) subdirectory exists even though vdso32/ | |
79 | #is not a kbuild sub-make subdirectory | |
80 | override obj-dirs = $(dir $(obj)) $(obj)/vdso32/ | |
81 | ||
82 | targets += vdso32/vdso32.lds | |
83 | targets += vdso32/vdso-note.o | |
84 | targets += vdso32/vclock_gettime.o | |
85 | ||
86 | KBUILD_AFLAGS_32 := $(filter-out -m64,$(KBUILD_AFLAGS)) -DBUILD_VDSO | |
87 | $(obj)/vdso32.so.dbg: KBUILD_AFLAGS = $(KBUILD_AFLAGS_32) | |
88 | $(obj)/vdso32.so.dbg: asflags-$(CONFIG_SPARC64) += -m32 | |
89 | ||
90 | KBUILD_CFLAGS_32 := $(filter-out -m64,$(KBUILD_CFLAGS)) | |
91 | KBUILD_CFLAGS_32 := $(filter-out -mcmodel=medlow,$(KBUILD_CFLAGS_32)) | |
92 | KBUILD_CFLAGS_32 := $(filter-out -fno-pic,$(KBUILD_CFLAGS_32)) | |
93 | KBUILD_CFLAGS_32 := $(filter-out $(GCC_PLUGINS_CFLAGS),$(KBUILD_CFLAGS_32)) | |
94 | KBUILD_CFLAGS_32 += -m32 -msoft-float -fpic -mno-app-regs -ffixed-g7 | |
95 | KBUILD_CFLAGS_32 += $(call cc-option, -fno-stack-protector) | |
96 | KBUILD_CFLAGS_32 += $(call cc-option, -foptimize-sibling-calls) | |
97 | KBUILD_CFLAGS_32 += -fno-omit-frame-pointer | |
98 | KBUILD_CFLAGS_32 += -DDISABLE_BRANCH_PROFILING | |
99 | KBUILD_CFLAGS_32 += -mv8plus | |
100 | $(obj)/vdso32.so.dbg: KBUILD_CFLAGS = $(KBUILD_CFLAGS_32) | |
101 | ||
102 | $(obj)/vdso32.so.dbg: FORCE \ | |
103 | $(obj)/vdso32/vdso32.lds \ | |
104 | $(obj)/vdso32/vclock_gettime.o \ | |
105 | $(obj)/vdso32/vdso-note.o | |
106 | $(call if_changed,vdso) | |
107 | ||
108 | # | |
109 | # The DSO images are built using a special linker script. | |
110 | # | |
111 | quiet_cmd_vdso = VDSO $@ | |
112 | cmd_vdso = $(CC) -nostdlib -o $@ \ | |
113 | $(VDSO_LDFLAGS) $(VDSO_LDFLAGS_$(filter %.lds,$(^F))) \ | |
114 | -Wl,-T,$(filter %.lds,$^) $(filter %.o,$^) | |
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) | |
143 | ||
144 | PHONY += vdso_install $(vdso_img_insttargets) | |
145 | vdso_install: $(vdso_img_insttargets) FORCE |