1*5c48b108SAl Viro# 2*5c48b108SAl Viro# Building vDSO images for x86. 3*5c48b108SAl Viro# 4*5c48b108SAl Viro 5*5c48b108SAl ViroVDSO64-y := y 6*5c48b108SAl Viro 7*5c48b108SAl Virovdso-install-$(VDSO64-y) += vdso.so 8*5c48b108SAl Viro 9*5c48b108SAl Viro 10*5c48b108SAl Viro# files to link into the vdso 11*5c48b108SAl Virovobjs-y := vdso-note.o um_vdso.o 12*5c48b108SAl Viro 13*5c48b108SAl Viro# files to link into kernel 14*5c48b108SAl Viroobj-$(VDSO64-y) += vdso.o vma.o 15*5c48b108SAl Viro 16*5c48b108SAl Virovobjs := $(foreach F,$(vobjs-y),$(obj)/$F) 17*5c48b108SAl Viro 18*5c48b108SAl Viro$(obj)/vdso.o: $(obj)/vdso.so 19*5c48b108SAl Viro 20*5c48b108SAl Virotargets += vdso.so vdso.so.dbg vdso.lds $(vobjs-y) 21*5c48b108SAl Viro 22*5c48b108SAl Viroexport CPPFLAGS_vdso.lds += -P -C 23*5c48b108SAl Viro 24*5c48b108SAl ViroVDSO_LDFLAGS_vdso.lds = -m64 -Wl,-soname=linux-vdso.so.1 \ 25*5c48b108SAl Viro -Wl,-z,max-page-size=4096 -Wl,-z,common-page-size=4096 26*5c48b108SAl Viro 27*5c48b108SAl Viro$(obj)/vdso.o: $(src)/vdso.S $(obj)/vdso.so 28*5c48b108SAl Viro 29*5c48b108SAl Viro$(obj)/vdso.so.dbg: $(src)/vdso.lds $(vobjs) FORCE 30*5c48b108SAl Viro $(call if_changed,vdso) 31*5c48b108SAl Viro 32*5c48b108SAl Viro$(obj)/%.so: OBJCOPYFLAGS := -S 33*5c48b108SAl Viro$(obj)/%.so: $(obj)/%.so.dbg FORCE 34*5c48b108SAl Viro $(call if_changed,objcopy) 35*5c48b108SAl Viro 36*5c48b108SAl Viro# 37*5c48b108SAl Viro# Don't omit frame pointers for ease of userspace debugging, but do 38*5c48b108SAl Viro# optimize sibling calls. 39*5c48b108SAl Viro# 40*5c48b108SAl ViroCFL := $(PROFILING) -mcmodel=small -fPIC -O2 -fasynchronous-unwind-tables -m64 \ 41*5c48b108SAl Viro $(filter -g%,$(KBUILD_CFLAGS)) $(call cc-option, -fno-stack-protector) \ 42*5c48b108SAl Viro -fno-omit-frame-pointer -foptimize-sibling-calls 43*5c48b108SAl Viro 44*5c48b108SAl Viro$(vobjs): KBUILD_CFLAGS += $(CFL) 45*5c48b108SAl Viro 46*5c48b108SAl Viro# 47*5c48b108SAl Viro# vDSO code runs in userspace and -pg doesn't help with profiling anyway. 48*5c48b108SAl Viro# 49*5c48b108SAl ViroCFLAGS_REMOVE_vdso-note.o = -pg 50*5c48b108SAl ViroCFLAGS_REMOVE_um_vdso.o = -pg 51*5c48b108SAl Viro 52*5c48b108SAl Virotargets += vdso-syms.lds 53*5c48b108SAl Viroobj-$(VDSO64-y) += vdso-syms.lds 54*5c48b108SAl Viro 55*5c48b108SAl Viro# 56*5c48b108SAl Viro# Match symbols in the DSO that look like VDSO*; produce a file of constants. 57*5c48b108SAl Viro# 58*5c48b108SAl Virosed-vdsosym := -e 's/^00*/0/' \ 59*5c48b108SAl Viro -e 's/^\([0-9a-fA-F]*\) . \(VDSO[a-zA-Z0-9_]*\)$$/\2 = 0x\1;/p' 60*5c48b108SAl Viroquiet_cmd_vdsosym = VDSOSYM $@ 61*5c48b108SAl Virodefine cmd_vdsosym 62*5c48b108SAl Viro $(NM) $< | LC_ALL=C sed -n $(sed-vdsosym) | LC_ALL=C sort > $@ 63*5c48b108SAl Viroendef 64*5c48b108SAl Viro 65*5c48b108SAl Viro$(obj)/%-syms.lds: $(obj)/%.so.dbg FORCE 66*5c48b108SAl Viro $(call if_changed,vdsosym) 67*5c48b108SAl Viro 68*5c48b108SAl Viro# 69*5c48b108SAl Viro# The DSO images are built using a special linker script. 70*5c48b108SAl Viro# 71*5c48b108SAl Viroquiet_cmd_vdso = VDSO $@ 72*5c48b108SAl Viro cmd_vdso = $(CC) -nostdlib -o $@ \ 73*5c48b108SAl Viro $(VDSO_LDFLAGS) $(VDSO_LDFLAGS_$(filter %.lds,$(^F))) \ 74*5c48b108SAl Viro -Wl,-T,$(filter %.lds,$^) $(filter %.o,$^) && \ 75*5c48b108SAl Viro sh $(srctree)/$(src)/checkundef.sh '$(NM)' '$@' 76*5c48b108SAl Viro 77*5c48b108SAl ViroVDSO_LDFLAGS = -fPIC -shared $(call cc-ldoption, -Wl$(comma)--hash-style=sysv) 78*5c48b108SAl ViroGCOV_PROFILE := n 79*5c48b108SAl Viro 80*5c48b108SAl Viro# 81*5c48b108SAl Viro# Install the unstripped copy of vdso*.so listed in $(vdso-install-y). 82*5c48b108SAl Viro# 83*5c48b108SAl Viroquiet_cmd_vdso_install = INSTALL $@ 84*5c48b108SAl Viro cmd_vdso_install = cp $(obj)/$@.dbg $(MODLIB)/vdso/$@ 85*5c48b108SAl Viro$(vdso-install-y): %.so: $(obj)/%.so.dbg FORCE 86*5c48b108SAl Viro @mkdir -p $(MODLIB)/vdso 87*5c48b108SAl Viro $(call cmd,vdso_install) 88*5c48b108SAl Viro 89*5c48b108SAl ViroPHONY += vdso_install $(vdso-install-y) 90*5c48b108SAl Virovdso_install: $(vdso-install-y) 91