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84 lines
2.6 KiB
84 lines
2.6 KiB
# SPDX-License-Identifier: GPL-2.0 |
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# List of files in the vdso |
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KCOV_INSTRUMENT := n |
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ARCH_REL_TYPE_ABS := R_390_COPY|R_390_GLOB_DAT|R_390_JMP_SLOT|R_390_RELATIVE |
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ARCH_REL_TYPE_ABS += R_390_GOT|R_390_PLT |
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include $(srctree)/lib/vdso/Makefile |
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obj-vdso64 = vdso_user_wrapper.o note.o |
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obj-cvdso64 = vdso64_generic.o getcpu.o |
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CFLAGS_REMOVE_getcpu.o = -pg $(CC_FLAGS_FTRACE) $(CC_FLAGS_EXPOLINE) |
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CFLAGS_REMOVE_vdso64_generic.o = -pg $(CC_FLAGS_FTRACE) $(CC_FLAGS_EXPOLINE) |
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# Build rules |
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targets := $(obj-vdso64) $(obj-cvdso64) vdso64.so vdso64.so.dbg |
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obj-vdso64 := $(addprefix $(obj)/, $(obj-vdso64)) |
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obj-cvdso64 := $(addprefix $(obj)/, $(obj-cvdso64)) |
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KBUILD_AFLAGS += -DBUILD_VDSO |
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KBUILD_CFLAGS += -DBUILD_VDSO -DDISABLE_BRANCH_PROFILING |
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KBUILD_AFLAGS_64 := $(filter-out -m64,$(KBUILD_AFLAGS)) |
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KBUILD_AFLAGS_64 += -m64 -s |
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KBUILD_CFLAGS_64 := $(filter-out -m64,$(KBUILD_CFLAGS)) |
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KBUILD_CFLAGS_64 += -m64 -fPIC -shared -fno-common -fno-builtin |
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ldflags-y := -fPIC -shared -nostdlib -soname=linux-vdso64.so.1 \ |
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--hash-style=both --build-id=sha1 -T |
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$(targets:%=$(obj)/%.dbg): KBUILD_CFLAGS = $(KBUILD_CFLAGS_64) |
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$(targets:%=$(obj)/%.dbg): KBUILD_AFLAGS = $(KBUILD_AFLAGS_64) |
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obj-y += vdso64_wrapper.o |
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targets += vdso64.lds |
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CPPFLAGS_vdso64.lds += -P -C -U$(ARCH) |
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# Disable gcov profiling, ubsan and kasan for VDSO code |
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GCOV_PROFILE := n |
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UBSAN_SANITIZE := n |
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KASAN_SANITIZE := n |
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# Force dependency (incbin is bad) |
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$(obj)/vdso64_wrapper.o : $(obj)/vdso64.so |
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# link rule for the .so file, .lds has to be first |
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$(obj)/vdso64.so.dbg: $(src)/vdso64.lds $(obj-vdso64) $(obj-cvdso64) FORCE |
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$(call if_changed,ld) |
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# strip rule for the .so file |
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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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# assembly rules for the .S files |
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$(obj-vdso64): %.o: %.S FORCE |
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$(call if_changed_dep,vdso64as) |
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$(obj-cvdso64): %.o: %.c FORCE |
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$(call if_changed_dep,vdso64cc) |
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# actual build commands |
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quiet_cmd_vdso64as = VDSO64A $@ |
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cmd_vdso64as = $(CC) $(a_flags) -c -o $@ $< |
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quiet_cmd_vdso64cc = VDSO64C $@ |
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cmd_vdso64cc = $(CC) $(c_flags) -c -o $@ $< |
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# install commands for the unstripped file |
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quiet_cmd_vdso_install = INSTALL $@ |
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cmd_vdso_install = cp $(obj)/$@.dbg $(MODLIB)/vdso/$@ |
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vdso64.so: $(obj)/vdso64.so.dbg |
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@mkdir -p $(MODLIB)/vdso |
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$(call cmd,vdso_install) |
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vdso_install: vdso64.so |
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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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