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2023-12-09 b22da3d8526a935aa31e086e63f60ff3246cb61c

 kernel/arch/sparc/vdso/Makefile
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@@ -1,8 +1,7 @@
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+# 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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-
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-KBUILD_CFLAGS += $(DISABLE_LTO)
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 VDSO64-$(CONFIG_SPARC64)	:= y
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 VDSOCOMPAT-$(CONFIG_COMPAT)	:= y
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@@ -33,16 +32,14 @@
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 CPPFLAGS_vdso.lds += -P -C
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-VDSO_LDFLAGS_vdso.lds = -m64 -Wl,-soname=linux-vdso.so.1 \
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-			-Wl,--no-undefined \
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-			-Wl,-z,max-page-size=8192 -Wl,-z,common-page-size=8192 \
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-			$(DISABLE_LTO)
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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-y			+= vdso2c
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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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@@ -54,26 +51,27 @@
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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 \
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-       -m64 -ffixed-g2 -ffixed-g3 -fcall-used-g4 -fcall-used-g5 -ffixed-g6 \
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-       -ffixed-g7 $(filter -g%,$(KBUILD_CFLAGS)) \
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-       $(call cc-option, -fno-stack-protector) -fno-omit-frame-pointer \
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-       -foptimize-sibling-calls -DBUILD_VDSO
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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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-$(vobjs): KBUILD_CFLAGS += $(CFL)
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+SPARC_REG_CFLAGS = -ffixed-g4 -ffixed-g5 -fcall-used-g5 -fcall-used-g7
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+
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+$(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_vdso-note.o = -pg
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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: $(obj)/%.so.dbg
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+$(obj)/%.so: $(obj)/%.so.dbg FORCE
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 	$(call if_changed,objcopy)
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-CPPFLAGS_vdso32.lds = $(CPPFLAGS_vdso.lds)
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-VDSO_LDFLAGS_vdso32.lds = -m32 -Wl,-m,elf32_sparc,-soname=linux-gate.so.1
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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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@@ -91,8 +89,9 @@
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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 += -m32 -msoft-float -fpic -mno-app-regs -ffixed-g7
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-KBUILD_CFLAGS_32 += $(call cc-option, -fno-stack-protector)
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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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@@ -109,12 +108,12 @@
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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 = $(CC) -nostdlib -o $@ \
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+      cmd_vdso = $(LD) -nostdlib -o $@ \
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 		       $(VDSO_LDFLAGS) $(VDSO_LDFLAGS_$(filter %.lds,$(^F))) \
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-		       -Wl,-T,$(filter %.lds,$^) $(filter %.o,$^)
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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 = -fPIC -shared $(call cc-ldoption, -Wl$(comma)--hash-style=sysv) \
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-	$(call cc-ldoption, -Wl$(comma)--build-id) -Wl,-Bsymbolic
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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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 #