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144 lines
4.6 KiB
144 lines
4.6 KiB
# SPDX-License-Identifier: GPL-2.0-only |
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# |
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# Building vDSO images for sparc. |
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# |
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VDSO64-$(CONFIG_SPARC64) := y |
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VDSOCOMPAT-$(CONFIG_COMPAT) := y |
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# files to link into the vdso |
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vobjs-y := vdso-note.o vclock_gettime.o |
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# files to link into kernel |
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obj-y += vma.o |
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# vDSO images to build |
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vdso_img-$(VDSO64-y) += 64 |
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vdso_img-$(VDSOCOMPAT-y) += 32 |
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vobjs := $(foreach F,$(vobjs-y),$(obj)/$F) |
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$(obj)/vdso.o: $(obj)/vdso.so |
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targets += vdso.lds $(vobjs-y) |
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# Build the vDSO image C files and link them in. |
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vdso_img_objs := $(vdso_img-y:%=vdso-image-%.o) |
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vdso_img_cfiles := $(vdso_img-y:%=vdso-image-%.c) |
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vdso_img_sodbg := $(vdso_img-y:%=vdso%.so.dbg) |
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obj-y += $(vdso_img_objs) |
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targets += $(vdso_img_cfiles) |
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targets += $(vdso_img_sodbg) $(vdso_img-y:%=vdso%.so) |
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CPPFLAGS_vdso.lds += -P -C |
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VDSO_LDFLAGS_vdso.lds = -m elf64_sparc -soname linux-vdso.so.1 --no-undefined \ |
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-z max-page-size=8192 |
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$(obj)/vdso64.so.dbg: $(obj)/vdso.lds $(vobjs) FORCE |
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$(call if_changed,vdso) |
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HOST_EXTRACFLAGS += -I$(srctree)/tools/include |
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hostprogs += vdso2c |
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quiet_cmd_vdso2c = VDSO2C $@ |
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cmd_vdso2c = $(obj)/vdso2c $< $(<:%.dbg=%) $@ |
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$(obj)/vdso-image-%.c: $(obj)/vdso%.so.dbg $(obj)/vdso%.so $(obj)/vdso2c FORCE |
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$(call if_changed,vdso2c) |
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# |
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# Don't omit frame pointers for ease of userspace debugging, but do |
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# optimize sibling calls. |
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# |
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CFL := $(PROFILING) -mcmodel=medlow -fPIC -O2 -fasynchronous-unwind-tables -m64 \ |
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$(filter -g%,$(KBUILD_CFLAGS)) -fno-stack-protector \ |
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-fno-omit-frame-pointer -foptimize-sibling-calls \ |
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-DDISABLE_BRANCH_PROFILING -DBUILD_VDSO |
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SPARC_REG_CFLAGS = -ffixed-g4 -ffixed-g5 -fcall-used-g5 -fcall-used-g7 |
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$(vobjs): KBUILD_CFLAGS := $(filter-out $(GCC_PLUGINS_CFLAGS) $(SPARC_REG_CFLAGS),$(KBUILD_CFLAGS)) $(CFL) |
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# |
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# vDSO code runs in userspace and -pg doesn't help with profiling anyway. |
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# |
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CFLAGS_REMOVE_vclock_gettime.o = -pg |
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CFLAGS_REMOVE_vdso32/vclock_gettime.o = -pg |
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$(obj)/%.so: OBJCOPYFLAGS := -S |
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$(obj)/%.so: $(obj)/%.so.dbg FORCE |
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$(call if_changed,objcopy) |
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CPPFLAGS_vdso32/vdso32.lds = $(CPPFLAGS_vdso.lds) |
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VDSO_LDFLAGS_vdso32.lds = -m elf32_sparc -soname linux-gate.so.1 |
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#This makes sure the $(obj) subdirectory exists even though vdso32/ |
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#is not a kbuild sub-make subdirectory |
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override obj-dirs = $(dir $(obj)) $(obj)/vdso32/ |
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targets += vdso32/vdso32.lds |
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targets += vdso32/vdso-note.o |
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targets += vdso32/vclock_gettime.o |
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KBUILD_AFLAGS_32 := $(filter-out -m64,$(KBUILD_AFLAGS)) -DBUILD_VDSO |
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$(obj)/vdso32.so.dbg: KBUILD_AFLAGS = $(KBUILD_AFLAGS_32) |
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$(obj)/vdso32.so.dbg: asflags-$(CONFIG_SPARC64) += -m32 |
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KBUILD_CFLAGS_32 := $(filter-out -m64,$(KBUILD_CFLAGS)) |
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KBUILD_CFLAGS_32 := $(filter-out -mcmodel=medlow,$(KBUILD_CFLAGS_32)) |
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KBUILD_CFLAGS_32 := $(filter-out -fno-pic,$(KBUILD_CFLAGS_32)) |
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KBUILD_CFLAGS_32 := $(filter-out $(GCC_PLUGINS_CFLAGS),$(KBUILD_CFLAGS_32)) |
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KBUILD_CFLAGS_32 := $(filter-out $(SPARC_REG_CFLAGS),$(KBUILD_CFLAGS_32)) |
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KBUILD_CFLAGS_32 += -m32 -msoft-float -fpic |
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KBUILD_CFLAGS_32 += -fno-stack-protector |
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KBUILD_CFLAGS_32 += $(call cc-option, -foptimize-sibling-calls) |
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KBUILD_CFLAGS_32 += -fno-omit-frame-pointer |
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KBUILD_CFLAGS_32 += -DDISABLE_BRANCH_PROFILING |
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KBUILD_CFLAGS_32 += -mv8plus |
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$(obj)/vdso32.so.dbg: KBUILD_CFLAGS = $(KBUILD_CFLAGS_32) |
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$(obj)/vdso32.so.dbg: FORCE \ |
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$(obj)/vdso32/vdso32.lds \ |
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$(obj)/vdso32/vclock_gettime.o \ |
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$(obj)/vdso32/vdso-note.o |
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$(call if_changed,vdso) |
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# |
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# The DSO images are built using a special linker script. |
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# |
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quiet_cmd_vdso = VDSO $@ |
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cmd_vdso = $(LD) -nostdlib -o $@ \ |
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$(VDSO_LDFLAGS) $(VDSO_LDFLAGS_$(filter %.lds,$(^F))) \ |
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-T $(filter %.lds,$^) $(filter %.o,$^) && \ |
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sh $(srctree)/$(src)/checkundef.sh '$(OBJDUMP)' '$@' |
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VDSO_LDFLAGS = -shared --hash-style=both --build-id=sha1 -Bsymbolic |
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GCOV_PROFILE := n |
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# |
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# Install the unstripped copies of vdso*.so. If our toolchain supports |
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# build-id, install .build-id links as well. |
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# |
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quiet_cmd_vdso_install = INSTALL $(@:install_%=%) |
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define cmd_vdso_install |
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cp $< "$(MODLIB)/vdso/$(@:install_%=%)"; \ |
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if readelf -n $< |grep -q 'Build ID'; then \ |
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buildid=`readelf -n $< |grep 'Build ID' |sed -e 's/^.*Build ID: \(.*\)$$/\1/'`; \ |
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first=`echo $$buildid | cut -b-2`; \ |
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last=`echo $$buildid | cut -b3-`; \ |
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mkdir -p "$(MODLIB)/vdso/.build-id/$$first"; \ |
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ln -sf "../../$(@:install_%=%)" "$(MODLIB)/vdso/.build-id/$$first/$$last.debug"; \ |
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fi |
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endef |
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vdso_img_insttargets := $(vdso_img_sodbg:%.dbg=install_%) |
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$(MODLIB)/vdso: FORCE |
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@mkdir -p $(MODLIB)/vdso |
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$(vdso_img_insttargets): install_%: $(obj)/%.dbg $(MODLIB)/vdso FORCE |
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$(call cmd,vdso_install) |
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PHONY += vdso_install $(vdso_img_insttargets) |
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vdso_install: $(vdso_img_insttargets) FORCE
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