projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 8512287a NL |
1 | hostprogs-y := vdsomunge |
| 2 | ||
| 3 | obj-vdso := vgettimeofday.o datapage.o | |
| 4 | ||
| 5 | # Build rules | |
| 6 | targets := $(obj-vdso) vdso.so vdso.so.dbg vdso.so.raw vdso.lds | |
| 7 | obj-vdso := $(addprefix $(obj)/, $(obj-vdso)) | |
| 8 | ||
| 9 | ccflags-y := -shared -fPIC -fno-common -fno-builtin -fno-stack-protector | |
| 10 | ccflags-y += -nostdlib -Wl,-soname=linux-vdso.so.1 -DDISABLE_BRANCH_PROFILING | |
| 11 | ccflags-y += -Wl,--no-undefined $(call cc-ldoption, -Wl$(comma)--hash-style=sysv) | |
| 12 | ||
| 13 | obj-y += vdso.o | |
| 14 | extra-y += vdso.lds | |
| 15 | CPPFLAGS_vdso.lds += -P -C -U$(ARCH) | |
| 16 | ||
| 17 | CFLAGS_REMOVE_vdso.o = -pg | |
| 18 | ||
| 19 | # Force -O2 to avoid libgcc dependencies | |
| 20 | CFLAGS_REMOVE_vgettimeofday.o = -pg -Os | |
| 21 | CFLAGS_vgettimeofday.o = -O2 | |
| 22 | ||
| 23 | # Disable gcov profiling for VDSO code | |
| 24 | GCOV_PROFILE := n | |
| 25 | ||
| 26 | # Force dependency | |
| 27 | $(obj)/vdso.o : $(obj)/vdso.so | |
| 28 | ||
| 29 | # Link rule for the .so file | |
| 30 | $(obj)/vdso.so.raw: $(src)/vdso.lds $(obj-vdso) FORCE | |
| 31 | $(call if_changed,vdsold) | |
| 32 | ||
| 33 | $(obj)/vdso.so.dbg: $(obj)/vdso.so.raw $(obj)/vdsomunge FORCE | |
| 34 | $(call if_changed,vdsomunge) | |
| 35 | ||
| 36 | # Strip rule for the .so file | |
| 37 | $(obj)/%.so: OBJCOPYFLAGS := -S | |
| 38 | $(obj)/%.so: $(obj)/%.so.dbg FORCE | |
| 39 | $(call if_changed,objcopy) | |
| 40 | ||
| 41 | # Actual build commands | |
| 42 | quiet_cmd_vdsold = VDSO $@ | |
| 43 | cmd_vdsold = $(CC) $(c_flags) -Wl,-T $(filter %.lds,$^) $(filter %.o,$^) \ | |
| 44 | $(call cc-ldoption, -Wl$(comma)--build-id) \ | |
| 45 | -Wl,-Bsymbolic -Wl,-z,max-page-size=4096 \ | |
| 46 | -Wl,-z,common-page-size=4096 -o $@ | |
| 47 | ||
| 48 | quiet_cmd_vdsomunge = MUNGE $@ | |
| 49 | cmd_vdsomunge = $(objtree)/$(obj)/vdsomunge $< $@ | |
| 50 | ||
| 51 | # | |
| 52 | # Install the unstripped copy of vdso.so.dbg. If our toolchain | |
| 53 | # supports build-id, install .build-id links as well. | |
| 54 | # | |
| 55 | # Cribbed from arch/x86/vdso/Makefile. | |
| 56 | # | |
| 57 | quiet_cmd_vdso_install = INSTALL $< | |
| 58 | define cmd_vdso_install | |
| 59 | cp $< "$(MODLIB)/vdso/vdso.so"; \ | |
| 60 | if readelf -n $< | grep -q 'Build ID'; then \ | |
| 61 | buildid=`readelf -n $< |grep 'Build ID' |sed -e 's/^.*Build ID: \(.*\)$$/\1/'`; \ | |
| 62 | first=`echo $$buildid | cut -b-2`; \ | |
| 63 | last=`echo $$buildid | cut -b3-`; \ | |
| 64 | mkdir -p "$(MODLIB)/vdso/.build-id/$$first"; \ | |
| 65 | ln -sf "../../vdso.so" "$(MODLIB)/vdso/.build-id/$$first/$$last.debug"; \ | |
| 66 | fi | |
| 67 | endef | |
| 68 | ||
| 69 | $(MODLIB)/vdso: FORCE | |
| 70 | @mkdir -p $(MODLIB)/vdso | |
| 71 | ||
| 72 | PHONY += vdso_install | |
| 73 | vdso_install: $(obj)/vdso.so.dbg $(MODLIB)/vdso FORCE | |
| 74 | $(call cmd,vdso_install) |