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49 lines
1.8 KiB
49 lines
1.8 KiB
# 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|R_PPC_REL24 |
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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 vgettimeofday.o |
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obj-vdso64 := $(addprefix $(obj)/, $(obj-vdso64)) |
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GCOV_PROFILE := n |
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KCOV_INSTRUMENT := n |
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UBSAN_SANITIZE := n |
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KASAN_SANITIZE := n |
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ccflags-y := -shared -fno-common -fno-builtin -nostdlib \ |
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-Wl,-soname=linux-vdso64.so.1 -Wl,--hash-style=both |
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asflags-y := -D__VDSO64__ -s |
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targets += vdso64.lds |
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CPPFLAGS_vdso64.lds += -P -C -U$(ARCH) |
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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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