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https://github.com/torvalds/linux
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907fa061cc
Now that hopefully all inline assemblies have been converted to single basic blocks we can enable kcov on s390. Note that this patch does not disable as many files on s390 like the x86 variant does. Right now I didn't see a reason to do that, however additional files or directories can be excluded at any time. The runtime overhead seems to be quite high. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
61 lines
1.7 KiB
Makefile
61 lines
1.7 KiB
Makefile
# List of files in the vdso, has to be asm only for now
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KCOV_INSTRUMENT := n
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obj-vdso32 = gettimeofday.o clock_getres.o clock_gettime.o note.o getcpu.o
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# Build rules
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targets := $(obj-vdso32) vdso32.so vdso32.so.dbg
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obj-vdso32 := $(addprefix $(obj)/, $(obj-vdso32))
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KBUILD_AFLAGS_31 := $(filter-out -m64,$(KBUILD_AFLAGS))
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KBUILD_AFLAGS_31 += -m31 -s
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KBUILD_CFLAGS_31 := $(filter-out -m64,$(KBUILD_CFLAGS))
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KBUILD_CFLAGS_31 += -m31 -fPIC -shared -fno-common -fno-builtin
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KBUILD_CFLAGS_31 += -nostdlib -Wl,-soname=linux-vdso32.so.1 \
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$(call cc-ldoption, -Wl$(comma)--hash-style=both)
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$(targets:%=$(obj)/%.dbg): KBUILD_CFLAGS = $(KBUILD_CFLAGS_31)
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$(targets:%=$(obj)/%.dbg): KBUILD_AFLAGS = $(KBUILD_AFLAGS_31)
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obj-y += vdso32_wrapper.o
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extra-y += vdso32.lds
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CPPFLAGS_vdso32.lds += -P -C -U$(ARCH)
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# Disable gcov profiling for VDSO code
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GCOV_PROFILE := n
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# Force dependency (incbin is bad)
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$(obj)/vdso32_wrapper.o : $(obj)/vdso32.so
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# link rule for the .so file, .lds has to be first
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$(obj)/vdso32.so.dbg: $(src)/vdso32.lds $(obj-vdso32)
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$(call if_changed,vdso32ld)
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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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$(obj-vdso32): %.o: %.S
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$(call if_changed_dep,vdso32as)
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# actual build commands
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quiet_cmd_vdso32ld = VDSO32L $@
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cmd_vdso32ld = $(CC) $(c_flags) -Wl,-T $^ -o $@
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quiet_cmd_vdso32as = VDSO32A $@
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cmd_vdso32as = $(CC) $(a_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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vdso32.so: $(obj)/vdso32.so.dbg
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@mkdir -p $(MODLIB)/vdso
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$(call cmd,vdso_install)
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vdso_install: vdso32.so
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