91bf695596
This is copied from arm64. Instead of using runtime generated signal trampoline offsets, get offsets at buildtime. If the said trampoline doesn't exist, build will fail. So no need to check whether the trampoline exists or not in the VDSO. Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/f8bfd6812c3e3678b1cdb4d55a52f9eb022b40d3.1601197618.git.christophe.leroy@csgroup.eu
56 lines
1.9 KiB
Makefile
56 lines
1.9 KiB
Makefile
# SPDX-License-Identifier: GPL-2.0
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# List of files in the vdso, has to be asm only for now
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ARCH_REL_TYPE_ABS := R_PPC_JUMP_SLOT|R_PPC_GLOB_DAT|R_PPC_ADDR32|R_PPC_ADDR24|R_PPC_ADDR16|R_PPC_ADDR16_LO|R_PPC_ADDR16_HI|R_PPC_ADDR16_HA|R_PPC_ADDR14|R_PPC_ADDR14_BRTAKEN|R_PPC_ADDR14_BRNTAKEN
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include $(srctree)/lib/vdso/Makefile
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obj-vdso64 = sigtramp.o gettimeofday.o datapage.o cacheflush.o note.o getcpu.o
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ifneq ($(c-gettimeofday-y),)
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CFLAGS_vgettimeofday.o += -include $(c-gettimeofday-y)
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CFLAGS_vgettimeofday.o += $(DISABLE_LATENT_ENTROPY_PLUGIN)
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CFLAGS_vgettimeofday.o += $(call cc-option, -fno-stack-protector)
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CFLAGS_vgettimeofday.o += -DDISABLE_BRANCH_PROFILING
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CFLAGS_vgettimeofday.o += -ffreestanding -fasynchronous-unwind-tables
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CFLAGS_REMOVE_vgettimeofday.o = $(CC_FLAGS_FTRACE)
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endif
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# Build rules
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targets := $(obj-vdso64) vdso64.so.dbg
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obj-vdso64 := $(addprefix $(obj)/, $(obj-vdso64))
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GCOV_PROFILE := n
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KCOV_INSTRUMENT := n
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UBSAN_SANITIZE := n
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KASAN_SANITIZE := n
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ccflags-y := -shared -fno-common -fno-builtin -nostdlib \
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-Wl,-soname=linux-vdso64.so.1 -Wl,--hash-style=both
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asflags-y := -D__VDSO64__ -s
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obj-y += vdso64_wrapper.o
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targets += vdso64.lds
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CPPFLAGS_vdso64.lds += -P -C -U$(ARCH)
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$(obj)/vgettimeofday.o: %.o: %.c FORCE
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# Force dependency (incbin is bad)
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$(obj)/vdso64_wrapper.o : $(obj)/vdso64.so.dbg
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# link rule for the .so file, .lds has to be first
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$(obj)/vdso64.so.dbg: $(src)/vdso64.lds $(obj-vdso64) $(obj)/vgettimeofday.o FORCE
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$(call if_changed,vdso64ld_and_check)
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# Generate VDSO offsets using helper script
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gen-vdsosym := $(srctree)/$(src)/gen_vdso_offsets.sh
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quiet_cmd_vdsosym = VDSOSYM $@
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cmd_vdsosym = $(NM) $< | $(gen-vdsosym) | LC_ALL=C sort > $@
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include/generated/vdso64-offsets.h: $(obj)/vdso64.so.dbg FORCE
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$(call if_changed,vdsosym)
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# actual build commands
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quiet_cmd_vdso64ld_and_check = VDSO64L $@
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cmd_vdso64ld_and_check = $(CC) $(c_flags) -o $@ -Wl,-T$(filter %.lds,$^) $(filter %.o,$^); $(cmd_vdso_check)
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