forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
91 lines
2.6 KiB
91 lines
2.6 KiB
# SPDX-License-Identifier: GPL-2.0 |
|
|
|
# Absolute relocation type $(ARCH_REL_TYPE_ABS) needs to be defined before |
|
# the inclusion of generic Makefile. |
|
ARCH_REL_TYPE_ABS := R_ARM_JUMP_SLOT|R_ARM_GLOB_DAT|R_ARM_ABS32 |
|
include $(srctree)/lib/vdso/Makefile |
|
|
|
hostprogs := vdsomunge |
|
|
|
obj-vdso := vgettimeofday.o datapage.o note.o |
|
|
|
# Build rules |
|
targets := $(obj-vdso) vdso.so vdso.so.dbg vdso.so.raw vdso.lds |
|
obj-vdso := $(addprefix $(obj)/, $(obj-vdso)) |
|
|
|
ccflags-y := -fPIC -fno-common -fno-builtin -fno-stack-protector |
|
ccflags-y += -DDISABLE_BRANCH_PROFILING -DBUILD_VDSO32 |
|
|
|
ldflags-$(CONFIG_CPU_ENDIAN_BE8) := --be8 |
|
ldflags-y := -Bsymbolic --no-undefined -soname=linux-vdso.so.1 \ |
|
-z max-page-size=4096 -nostdlib -shared $(ldflags-y) \ |
|
--hash-style=sysv --build-id=sha1 \ |
|
-T |
|
|
|
obj-$(CONFIG_VDSO) += vdso.o |
|
CPPFLAGS_vdso.lds += -P -C -U$(ARCH) |
|
|
|
CFLAGS_REMOVE_vdso.o = -pg |
|
|
|
# Force -O2 to avoid libgcc dependencies |
|
CFLAGS_REMOVE_vgettimeofday.o = -pg -Os $(GCC_PLUGINS_CFLAGS) |
|
ifeq ($(c-gettimeofday-y),) |
|
CFLAGS_vgettimeofday.o = -O2 |
|
else |
|
CFLAGS_vgettimeofday.o = -O2 -include $(c-gettimeofday-y) |
|
endif |
|
|
|
# Disable gcov profiling for VDSO code |
|
GCOV_PROFILE := n |
|
|
|
# Prevents link failures: __sanitizer_cov_trace_pc() is not linked in. |
|
KCOV_INSTRUMENT := n |
|
|
|
KASAN_SANITIZE := n |
|
|
|
# Force dependency |
|
$(obj)/vdso.o : $(obj)/vdso.so |
|
|
|
# Link rule for the .so file |
|
$(obj)/vdso.so.raw: $(obj)/vdso.lds $(obj-vdso) FORCE |
|
$(call if_changed,vdsold_and_vdso_check) |
|
|
|
$(obj)/vdso.so.dbg: $(obj)/vdso.so.raw $(obj)/vdsomunge FORCE |
|
$(call if_changed,vdsomunge) |
|
|
|
# Strip rule for the .so file |
|
$(obj)/%.so: OBJCOPYFLAGS := -S |
|
$(obj)/%.so: $(obj)/%.so.dbg FORCE |
|
$(call if_changed,objcopy) |
|
|
|
# Actual build commands |
|
quiet_cmd_vdsold_and_vdso_check = LD $@ |
|
cmd_vdsold_and_vdso_check = $(cmd_ld); $(cmd_vdso_check) |
|
|
|
quiet_cmd_vdsomunge = MUNGE $@ |
|
cmd_vdsomunge = $(objtree)/$(obj)/vdsomunge $< $@ |
|
|
|
# |
|
# Install the unstripped copy of vdso.so.dbg. If our toolchain |
|
# supports build-id, install .build-id links as well. |
|
# |
|
# Cribbed from arch/x86/vdso/Makefile. |
|
# |
|
quiet_cmd_vdso_install = INSTALL $< |
|
define cmd_vdso_install |
|
cp $< "$(MODLIB)/vdso/vdso.so"; \ |
|
if readelf -n $< | grep -q 'Build ID'; then \ |
|
buildid=`readelf -n $< |grep 'Build ID' |sed -e 's/^.*Build ID: \(.*\)$$/\1/'`; \ |
|
first=`echo $$buildid | cut -b-2`; \ |
|
last=`echo $$buildid | cut -b3-`; \ |
|
mkdir -p "$(MODLIB)/vdso/.build-id/$$first"; \ |
|
ln -sf "../../vdso.so" "$(MODLIB)/vdso/.build-id/$$first/$$last.debug"; \ |
|
fi |
|
endef |
|
|
|
$(MODLIB)/vdso: FORCE |
|
@mkdir -p $(MODLIB)/vdso |
|
|
|
PHONY += vdso_install |
|
vdso_install: $(obj)/vdso.so.dbg $(MODLIB)/vdso |
|
$(call cmd,vdso_install)
|
|
|