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- # SPDX-License-Identifier: GPL-2.0-only
- #
- # Building vDSO images for sparc.
- #
- 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 += 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)) -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 $(RANDSTRUCT_CFLAGS) $(GCC_PLUGINS_CFLAGS) $(SPARC_REG_CFLAGS),$(KBUILD_CFLAGS)) $(CFL)
- #
- # vDSO code runs in userspace and -pg doesn't help with profiling anyway.
- #
- CFLAGS_REMOVE_vclock_gettime.o = -pg
- CFLAGS_REMOVE_vdso32/vclock_gettime.o = -pg
- $(obj)/%.so: OBJCOPYFLAGS := -S
- $(obj)/%.so: $(obj)/%.so.dbg FORCE
- $(call if_changed,objcopy)
- CPPFLAGS_vdso32/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 $(RANDSTRUCT_CFLAGS),$(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 += -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=sha1 -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
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