0e035cb818
[ Upstream commit fc2f5f10f9bc5e58d38e9fda7dae107ac04a799f ]
Citing Andy Lutomirski from commit dda1e95cee38 ("x86/vdso: Create
.build-id links for unstripped vdso files"):
"With this change, doing 'make vdso_install' and telling gdb:
set debug-file-directory /lib/modules/KVER/vdso
will enable vdso debugging with symbols. This is useful for
testing, but kernel RPM builds will probably want to manually delete
these symlinks or otherwise do something sensible when they strip
the vdso/*.so files."
Fixes: 4bff8cb54502 ("s390: convert to GENERIC_VDSO")
Signed-off-by: Jens Remus <jremus@linux.ibm.com>
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
46 lines
1.2 KiB
Makefile
46 lines
1.2 KiB
Makefile
# SPDX-License-Identifier: GPL-2.0-only
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# ==========================================================================
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# Install unstripped copies of vDSO
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# ==========================================================================
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PHONY := __default
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__default:
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@:
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include $(srctree)/scripts/Kbuild.include
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install-dir := $(MODLIB)/vdso
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define gen_install_rules
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src := $$(firstword $$(subst :,$(space),$(1)))
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dest := $(install-dir)/$$(or $$(word 2,$$(subst :,$(space),$(1))),$$(patsubst %.dbg,%,$$(notdir $(1))))
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__default: $$(dest)
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$$(dest): $$(src) FORCE
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$$(call cmd,install)
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# Some architectures create .build-id symlinks
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ifneq ($(filter arm s390 sparc x86, $(SRCARCH)),)
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link := $(install-dir)/.build-id/$$(shell $(READELF) -n $$(src) | sed -n 's@^.*Build ID: \(..\)\(.*\)@\1/\2@p').debug
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__default: $$(link)
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$$(link): $$(dest) FORCE
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$$(call cmd,symlink)
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endif
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endef
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$(foreach x, $(sort $(INSTALL_FILES)), $(eval $(call gen_install_rules,$(x))))
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quiet_cmd_install = INSTALL $@
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cmd_install = mkdir -p $(dir $@); cp $< $@
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quiet_cmd_symlink = SYMLINK $@
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cmd_symlink = mkdir -p $(dir $@); ln -sf --relative $< $@
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PHONY += FORCE
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FORCE:
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.PHONY: $(PHONY)
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