147 lines
4.6 KiB
Makefile
147 lines
4.6 KiB
Makefile
# SPDX-License-Identifier: GPL-2.0-only
|
|
#
|
|
# Building vDSO images for sparc.
|
|
#
|
|
|
|
KBUILD_CFLAGS += $(DISABLE_LTO)
|
|
|
|
VDSO64-$(CONFIG_SPARC64) := y
|
|
VDSOCOMPAT-$(CONFIG_COMPAT) := y
|
|
|
|
# files to link into the vdso
|
|
vobjs-y := vdso-note.o vclock_gettime.o
|
|
|
|
# files to link into kernel
|
|
obj-y += vma.o
|
|
|
|
# vDSO images to build
|
|
vdso_img-$(VDSO64-y) += 64
|
|
vdso_img-$(VDSOCOMPAT-y) += 32
|
|
|
|
vobjs := $(foreach F,$(vobjs-y),$(obj)/$F)
|
|
|
|
$(obj)/vdso.o: $(obj)/vdso.so
|
|
|
|
targets += vdso.lds $(vobjs-y)
|
|
|
|
# Build the vDSO image C files and link them in.
|
|
vdso_img_objs := $(vdso_img-y:%=vdso-image-%.o)
|
|
vdso_img_cfiles := $(vdso_img-y:%=vdso-image-%.c)
|
|
vdso_img_sodbg := $(vdso_img-y:%=vdso%.so.dbg)
|
|
obj-y += $(vdso_img_objs)
|
|
targets += $(vdso_img_cfiles)
|
|
targets += $(vdso_img_sodbg) $(vdso_img-y:%=vdso%.so)
|
|
|
|
CPPFLAGS_vdso.lds += -P -C
|
|
|
|
VDSO_LDFLAGS_vdso.lds = -m elf64_sparc -soname linux-vdso.so.1 --no-undefined \
|
|
-z max-page-size=8192
|
|
|
|
$(obj)/vdso64.so.dbg: $(obj)/vdso.lds $(vobjs) FORCE
|
|
$(call if_changed,vdso)
|
|
|
|
HOST_EXTRACFLAGS += -I$(srctree)/tools/include
|
|
hostprogs-y += vdso2c
|
|
|
|
quiet_cmd_vdso2c = VDSO2C $@
|
|
cmd_vdso2c = $(obj)/vdso2c $< $(<:%.dbg=%) $@
|
|
|
|
$(obj)/vdso-image-%.c: $(obj)/vdso%.so.dbg $(obj)/vdso%.so $(obj)/vdso2c FORCE
|
|
$(call if_changed,vdso2c)
|
|
|
|
#
|
|
# Don't omit frame pointers for ease of userspace debugging, but do
|
|
# optimize sibling calls.
|
|
#
|
|
CFL := $(PROFILING) -mcmodel=medlow -fPIC -O2 -fasynchronous-unwind-tables -m64 \
|
|
$(filter -g%,$(KBUILD_CFLAGS)) $(call cc-option, -fno-stack-protector) \
|
|
-fno-omit-frame-pointer -foptimize-sibling-calls \
|
|
-DDISABLE_BRANCH_PROFILING -DBUILD_VDSO
|
|
|
|
SPARC_REG_CFLAGS = -ffixed-g4 -ffixed-g5 -fcall-used-g5 -fcall-used-g7
|
|
|
|
$(vobjs): KBUILD_CFLAGS := $(filter-out $(GCC_PLUGINS_CFLAGS) $(SPARC_REG_CFLAGS),$(KBUILD_CFLAGS)) $(CFL)
|
|
|
|
#
|
|
# vDSO code runs in userspace and -pg doesn't help with profiling anyway.
|
|
#
|
|
CFLAGS_REMOVE_vdso-note.o = -pg
|
|
CFLAGS_REMOVE_vclock_gettime.o = -pg
|
|
|
|
$(obj)/%.so: OBJCOPYFLAGS := -S
|
|
$(obj)/%.so: $(obj)/%.so.dbg FORCE
|
|
$(call if_changed,objcopy)
|
|
|
|
CPPFLAGS_vdso32.lds = $(CPPFLAGS_vdso.lds)
|
|
VDSO_LDFLAGS_vdso32.lds = -m elf32_sparc -soname linux-gate.so.1
|
|
|
|
#This makes sure the $(obj) subdirectory exists even though vdso32/
|
|
#is not a kbuild sub-make subdirectory
|
|
override obj-dirs = $(dir $(obj)) $(obj)/vdso32/
|
|
|
|
targets += vdso32/vdso32.lds
|
|
targets += vdso32/vdso-note.o
|
|
targets += vdso32/vclock_gettime.o
|
|
|
|
KBUILD_AFLAGS_32 := $(filter-out -m64,$(KBUILD_AFLAGS)) -DBUILD_VDSO
|
|
$(obj)/vdso32.so.dbg: KBUILD_AFLAGS = $(KBUILD_AFLAGS_32)
|
|
$(obj)/vdso32.so.dbg: asflags-$(CONFIG_SPARC64) += -m32
|
|
|
|
KBUILD_CFLAGS_32 := $(filter-out -m64,$(KBUILD_CFLAGS))
|
|
KBUILD_CFLAGS_32 := $(filter-out -mcmodel=medlow,$(KBUILD_CFLAGS_32))
|
|
KBUILD_CFLAGS_32 := $(filter-out -fno-pic,$(KBUILD_CFLAGS_32))
|
|
KBUILD_CFLAGS_32 := $(filter-out $(GCC_PLUGINS_CFLAGS),$(KBUILD_CFLAGS_32))
|
|
KBUILD_CFLAGS_32 := $(filter-out $(SPARC_REG_CFLAGS),$(KBUILD_CFLAGS_32))
|
|
KBUILD_CFLAGS_32 += -m32 -msoft-float -fpic
|
|
KBUILD_CFLAGS_32 += $(call cc-option, -fno-stack-protector)
|
|
KBUILD_CFLAGS_32 += $(call cc-option, -foptimize-sibling-calls)
|
|
KBUILD_CFLAGS_32 += -fno-omit-frame-pointer
|
|
KBUILD_CFLAGS_32 += -DDISABLE_BRANCH_PROFILING
|
|
KBUILD_CFLAGS_32 += -mv8plus
|
|
$(obj)/vdso32.so.dbg: KBUILD_CFLAGS = $(KBUILD_CFLAGS_32)
|
|
|
|
$(obj)/vdso32.so.dbg: FORCE \
|
|
$(obj)/vdso32/vdso32.lds \
|
|
$(obj)/vdso32/vclock_gettime.o \
|
|
$(obj)/vdso32/vdso-note.o
|
|
$(call if_changed,vdso)
|
|
|
|
#
|
|
# The DSO images are built using a special linker script.
|
|
#
|
|
quiet_cmd_vdso = VDSO $@
|
|
cmd_vdso = $(LD) -nostdlib -o $@ \
|
|
$(VDSO_LDFLAGS) $(VDSO_LDFLAGS_$(filter %.lds,$(^F))) \
|
|
-T $(filter %.lds,$^) $(filter %.o,$^) && \
|
|
sh $(srctree)/$(src)/checkundef.sh '$(OBJDUMP)' '$@'
|
|
|
|
VDSO_LDFLAGS = -shared --hash-style=both --build-id -Bsymbolic
|
|
GCOV_PROFILE := n
|
|
|
|
#
|
|
# Install the unstripped copies of vdso*.so. If our toolchain supports
|
|
# build-id, install .build-id links as well.
|
|
#
|
|
quiet_cmd_vdso_install = INSTALL $(@:install_%=%)
|
|
define cmd_vdso_install
|
|
cp $< "$(MODLIB)/vdso/$(@:install_%=%)"; \
|
|
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 "../../$(@:install_%=%)" "$(MODLIB)/vdso/.build-id/$$first/$$last.debug"; \
|
|
fi
|
|
endef
|
|
|
|
vdso_img_insttargets := $(vdso_img_sodbg:%.dbg=install_%)
|
|
|
|
$(MODLIB)/vdso: FORCE
|
|
@mkdir -p $(MODLIB)/vdso
|
|
|
|
$(vdso_img_insttargets): install_%: $(obj)/%.dbg $(MODLIB)/vdso FORCE
|
|
$(call cmd,vdso_install)
|
|
|
|
PHONY += vdso_install $(vdso_img_insttargets)
|
|
vdso_install: $(vdso_img_insttargets) FORCE
|