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. This may break make vdso_install with binutils before 2.17.50.0.17. On the other hand, make vdso_install was probably never useful with earlier binutils, since the installed files are AFAIK completely useless without build-id. Signed-off-by: Andy Lutomirski <[email protected]> --- arch/x86/vdso/Makefile | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/arch/x86/vdso/Makefile b/arch/x86/vdso/Makefile index 2c1ca98..ac16c17 100644 --- a/arch/x86/vdso/Makefile +++ b/arch/x86/vdso/Makefile @@ -176,7 +176,14 @@ GCOV_PROFILE := n # Install the unstripped copies of vdso*.so. # quiet_cmd_vdso_install = INSTALL $(@:install_%=%) - cmd_vdso_install = cp $< $(MODLIB)/vdso/$(@:install_%=%) +define cmd_vdso_install + buildid=`readelf -n $< |grep 'Build ID' |sed -e 's/^.*Build ID: \(.*\)$$/\1/'`; \ + first=`echo $$buildid | cut -b-2`; \ + last=`echo $$buildid | cut -b3-`; \ + cp $< "$(MODLIB)/vdso/$(@:install_%=%)"; \ + mkdir -p "$(MODLIB)/vdso/.build-id/$$first"; \ + ln -sf "../../$(@:install_%=%)" "$(MODLIB)/vdso/.build-id/$$first/$$last.debug" +endef vdso_img_insttargets := $(vdso_img_sodbg:%.dbg=install_%) -- 1.9.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
