91 lines
2.3 KiB
Makefile
91 lines
2.3 KiB
Makefile
|
#
|
||
|
|
# Building vDSO images for x86.
|
||
|
|
#
|
||
|
|
|
||
|
|
VDSO64-y := y
|
||
|
|
|
||
|
|
vdso-install-$(VDSO64-y) += vdso.so
|
||
|
|
|
||
|
|
|
||
|
|
# files to link into the vdso
|
||
|
|
vobjs-y := vdso-note.o um_vdso.o
|
||
|
|
|
||
|
|
# files to link into kernel
|
||
|
|
obj-$(VDSO64-y) += vdso.o vma.o
|
||
|
|
|
||
|
|
vobjs := $(foreach F,$(vobjs-y),$(obj)/$F)
|
||
|
|
|
||
|
|
$(obj)/vdso.o: $(obj)/vdso.so
|
||
|
|
|
||
|
|
targets += vdso.so vdso.so.dbg vdso.lds $(vobjs-y)
|
||
|
|
|
||
|
|
export CPPFLAGS_vdso.lds += -P -C
|
||
|
|
|
||
|
|
VDSO_LDFLAGS_vdso.lds = -m64 -Wl,-soname=linux-vdso.so.1 \
|
||
|
|
-Wl,-z,max-page-size=4096 -Wl,-z,common-page-size=4096
|
||
|
|
|
||
|
|
$(obj)/vdso.o: $(src)/vdso.S $(obj)/vdso.so
|
||
|
|
|
||
|
|
$(obj)/vdso.so.dbg: $(src)/vdso.lds $(vobjs) FORCE
|
||
|
|
$(call if_changed,vdso)
|
||
|
|
|
||
|
|
$(obj)/%.so: OBJCOPYFLAGS := -S
|
||
|
|
$(obj)/%.so: $(obj)/%.so.dbg FORCE
|
||
|
|
$(call if_changed,objcopy)
|
||
|
|
|
||
|
|
#
|
||
|
|
# Don't omit frame pointers for ease of userspace debugging, but do
|
||
|
|
# optimize sibling calls.
|
||
|
|
#
|
||
|
|
CFL := $(PROFILING) -mcmodel=small -fPIC -O2 -fasynchronous-unwind-tables -m64 \
|
||
|
|
$(filter -g%,$(KBUILD_CFLAGS)) $(call cc-option, -fno-stack-protector) \
|
||
|
|
-fno-omit-frame-pointer -foptimize-sibling-calls
|
||
|
|
|
||
|
|
$(vobjs): KBUILD_CFLAGS += $(CFL)
|
||
|
|
|
||
|
|
#
|
||
|
|
# vDSO code runs in userspace and -pg doesn't help with profiling anyway.
|
||
|
|
#
|
||
|
|
CFLAGS_REMOVE_vdso-note.o = -pg
|
||
|
|
CFLAGS_REMOVE_um_vdso.o = -pg
|
||
|
|
|
||
|
|
targets += vdso-syms.lds
|
||
|
|
obj-$(VDSO64-y) += vdso-syms.lds
|
||
|
|
|
||
|
|
#
|
||
|
|
# Match symbols in the DSO that look like VDSO*; produce a file of constants.
|
||
|
|
#
|
||
|
|
sed-vdsosym := -e 's/^00*/0/' \
|
||
|
|
-e 's/^\([0-9a-fA-F]*\) . \(VDSO[a-zA-Z0-9_]*\)$$/\2 = 0x\1;/p'
|
||
|
|
quiet_cmd_vdsosym = VDSOSYM $@
|
||
|
|
define cmd_vdsosym
|
||
|
|
$(NM) $< | LC_ALL=C sed -n $(sed-vdsosym) | LC_ALL=C sort > $@
|
||
|
|
endef
|
||
|
|
|
||
|
|
$(obj)/%-syms.lds: $(obj)/%.so.dbg FORCE
|
||
|
|
$(call if_changed,vdsosym)
|
||
|
|
|
||
|
|
#
|
||
|
|
# The DSO images are built using a special linker script.
|
||
|
|
#
|
||
|
|
quiet_cmd_vdso = VDSO $@
|
||
|
|
cmd_vdso = $(CC) -nostdlib -o $@ \
|
||
|
|
$(VDSO_LDFLAGS) $(VDSO_LDFLAGS_$(filter %.lds,$(^F))) \
|
||
|
|
-Wl,-T,$(filter %.lds,$^) $(filter %.o,$^) && \
|
||
|
|
sh $(srctree)/$(src)/checkundef.sh '$(NM)' '$@'
|
||
|
|
|
||
|
|
VDSO_LDFLAGS = -fPIC -shared $(call cc-ldoption, -Wl$(comma)--hash-style=sysv)
|
||
|
|
GCOV_PROFILE := n
|
||
|
|
|
||
|
|
#
|
||
|
|
# Install the unstripped copy of vdso*.so listed in $(vdso-install-y).
|
||
|
|
#
|
||
|
|
quiet_cmd_vdso_install = INSTALL $@
|
||
|
|
cmd_vdso_install = cp $(obj)/$@.dbg $(MODLIB)/vdso/$@
|
||
|
|
$(vdso-install-y): %.so: $(obj)/%.so.dbg FORCE
|
||
|
|
@mkdir -p $(MODLIB)/vdso
|
||
|
|
$(call cmd,vdso_install)
|
||
|
|
|
||
|
|
PHONY += vdso_install $(vdso-install-y)
|
||
|
|
vdso_install: $(vdso-install-y)
|