mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2026-05-09 21:42:09 +02:00
Thomas Weißschuh
127b0e05c1
As the Makefile is included into other Makefiles it can not be used to define objects to be built from the current source directory. However the generic datastore will introduce such a local source file. Rename the included Makefile so it is clear how it is to be used and to make room for a regular Makefile in lib/vdso/. Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Link: https://lore.kernel.org/all/20250204-vdso-store-rng-v3-4-13a4669dfc8c@linutronix.de
67 lines
2.1 KiB
Makefile
67 lines
2.1 KiB
Makefile
# Include the generic Makefile to check the built vdso.
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include $(srctree)/lib/vdso/Makefile.include
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KCOV_INSTRUMENT := n
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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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KCSAN_SANITIZE := n
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obj-vdso32 = note.o sigtramp.o restart_syscall.o
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obj-cvdso32 = vdso32_generic.o
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# Build rules
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targets := $(obj-vdso32) $(obj-cvdso32) vdso32.so
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obj-vdso32 := $(addprefix $(obj)/, $(obj-vdso32))
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obj-cvdso32 := $(addprefix $(obj)/, $(obj-cvdso32))
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VDSO_CFLAGS_REMOVE := -pg $(CC_FLAGS_FTRACE)
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CFLAGS_REMOVE_vdso32_generic.o = $(VDSO_CFLAGS_REMOVE)
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ccflags-y := -shared -fno-common -fbuiltin -mno-fast-indirect-calls -O2 -mno-long-calls
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# -march=1.1 -mschedule=7100LC
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ccflags-y += -nostdlib -Wl,-soname=linux-vdso32.so.1 \
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$(call ld-option, -Wl$(comma)--hash-style=sysv)
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asflags-y := -D__VDSO32__ -s
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KBUILD_AFLAGS += -DBUILD_VDSO
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KBUILD_CFLAGS += -DBUILD_VDSO -DDISABLE_BRANCH_PROFILING
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VDSO_LIBGCC := $(shell $(CROSS32CC) -print-libgcc-file-name)
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obj-y += vdso32_wrapper.o
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targets += vdso32.lds
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CPPFLAGS_vdso32.lds += -P -C # -U$(ARCH)
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$(obj)/vdso32_wrapper.o : $(obj)/vdso32.so FORCE
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# Force dependency (incbin is bad)
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# link rule for the .so file, .lds has to be first
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$(obj)/vdso32.so: $(obj)/vdso32.lds $(obj-vdso32) $(obj-cvdso32) $(VDSO_LIBGCC) FORCE
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$(call if_changed,vdso32ld)
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# assembly rules for the .S files
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$(obj-vdso32): %.o: %.S FORCE
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$(call if_changed_dep,vdso32as)
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$(obj-cvdso32): %.o: %.c FORCE
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$(call if_changed_dep,vdso32cc)
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# actual build commands
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quiet_cmd_vdso32ld = VDSO32L $@
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cmd_vdso32ld = $(CROSS32CC) $(c_flags) -Wl,-T $(filter-out FORCE, $^) -o $@
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quiet_cmd_vdso32as = VDSO32A $@
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cmd_vdso32as = $(CROSS32CC) $(a_flags) -c -o $@ $<
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quiet_cmd_vdso32cc = VDSO32C $@
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cmd_vdso32cc = $(CROSS32CC) $(c_flags) -c -o $@ $<
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# Generate VDSO offsets using helper script
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gen-vdsosym := $(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/vdso32-offsets.h: $(obj)/vdso32.so FORCE
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$(call if_changed,vdsosym)
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