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Linux/arch/arm/vdso/Makefile

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  1 # SPDX-License-Identifier: GPL-2.0
  2 
  3 # Include the generic Makefile to check the built vdso.
  4 include $(srctree)/lib/vdso/Makefile
  5 
  6 hostprogs := vdsomunge
  7 
  8 obj-vdso := vgettimeofday.o datapage.o note.o
  9 
 10 # Build rules
 11 targets := $(obj-vdso) vdso.so vdso.so.dbg vdso.so.raw vdso.lds
 12 obj-vdso := $(addprefix $(obj)/, $(obj-vdso))
 13 
 14 ccflags-y := -fPIC -fno-common -fno-builtin -fno-stack-protector
 15 ccflags-y += -DDISABLE_BRANCH_PROFILING -DBUILD_VDSO32
 16 
 17 ldflags-$(CONFIG_CPU_ENDIAN_BE8) := --be8
 18 ldflags-y := -Bsymbolic --no-undefined -soname=linux-vdso.so.1 \
 19             -z max-page-size=4096 -shared $(ldflags-y) \
 20             --hash-style=sysv --build-id=sha1 \
 21             -T
 22 
 23 obj-$(CONFIG_VDSO) += vdso.o
 24 CPPFLAGS_vdso.lds += -P -C -U$(ARCH)
 25 
 26 CFLAGS_REMOVE_vdso.o = -pg
 27 
 28 # Force -O2 to avoid libgcc dependencies
 29 CFLAGS_REMOVE_vgettimeofday.o = -pg -Os $(RANDSTRUCT_CFLAGS) $(GCC_PLUGINS_CFLAGS)
 30 ifeq ($(c-gettimeofday-y),)
 31 CFLAGS_vgettimeofday.o = -O2
 32 else
 33 CFLAGS_vgettimeofday.o = -O2 -include $(c-gettimeofday-y)
 34 endif
 35 
 36 # Force dependency
 37 $(obj)/vdso.o : $(obj)/vdso.so
 38 
 39 # Link rule for the .so file
 40 $(obj)/vdso.so.raw: $(obj)/vdso.lds $(obj-vdso) FORCE
 41         $(call if_changed,vdsold_and_vdso_check)
 42 
 43 $(obj)/vdso.so.dbg: $(obj)/vdso.so.raw $(obj)/vdsomunge FORCE
 44         $(call if_changed,vdsomunge)
 45 
 46 # Strip rule for the .so file
 47 $(obj)/%.so: OBJCOPYFLAGS := -S
 48 $(obj)/%.so: $(obj)/%.so.dbg FORCE
 49         $(call if_changed,objcopy)
 50 
 51 # Actual build commands
 52 quiet_cmd_vdsold_and_vdso_check = LD      $@
 53       cmd_vdsold_and_vdso_check = $(cmd_ld); $(cmd_vdso_check)
 54 
 55 quiet_cmd_vdsomunge = MUNGE   $@
 56       cmd_vdsomunge = $(objtree)/$(obj)/vdsomunge $< $@

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