On Thu, May 04, 2017 at 04:38:25PM -0700, Laura Abbott wrote:
>
> Once upon a time, the kernel needed a lot of special handling to
> generate proper debuginfo as the kernel was ahead in technology. These
> days, rpm has improved debuginfo support. The kernel has not kept up
> with this and it's forward looking calls are now out of date. Switch to
> more standard invocations of debuginfo calls.
> ---
> v3: Adds the new flag to never touch the buildids. I think I got the
> BuildConflicts tag correct?
Hi Laura,
Thanks for the work! The patch seems reasonable to me. I will let Mark
comment on it too. Do you have a scratch build that I could look at?
Cheers,
Don
> ---
> kbuild-AFTER_LINK.patch | 126 ------------------------------------------------
> kernel.spec | 49 ++++++++-----------
> 2 files changed, 19 insertions(+), 156 deletions(-)
> delete mode 100644 kbuild-AFTER_LINK.patch
>
> diff --git a/kbuild-AFTER_LINK.patch b/kbuild-AFTER_LINK.patch
> deleted file mode 100644
> index ab738c62..00000000
> --- a/kbuild-AFTER_LINK.patch
> +++ /dev/null
> @@ -1,126 +0,0 @@
> -From 649d991ca7737dd227f2a1ca4f30247daf6a7b4b Mon Sep 17 00:00:00 2001
> -From: Roland McGrath <roland@xxxxxxxxxx>
> -Date: Mon, 6 Oct 2008 23:03:03 -0700
> -Subject: [PATCH] kbuild: AFTER_LINK
> -
> -If the make variable AFTER_LINK is set, it is a command line to run
> -after each final link. This includes vmlinux itself and vDSO images.
> -
> -Bugzilla: N/A
> -Upstream-status: ??
> -
> -Signed-off-by: Roland McGrath <roland@xxxxxxxxxx>
> ----
> - arch/arm64/kernel/vdso/Makefile | 3 ++-
> - arch/powerpc/kernel/vdso32/Makefile | 3 ++-
> - arch/powerpc/kernel/vdso64/Makefile | 3 ++-
> - arch/s390/kernel/vdso32/Makefile | 3 ++-
> - arch/s390/kernel/vdso64/Makefile | 3 ++-
> - arch/x86/entry/vdso/Makefile | 5 +++--
> - scripts/link-vmlinux.sh | 4 ++++
> - 7 files changed, 17 insertions(+), 7 deletions(-)
> -
> -diff --git a/arch/arm64/kernel/vdso/Makefile b/arch/arm64/kernel/vdso/Makefile
> -index 62c84f7..f44236a 100644
> ---- a/arch/arm64/kernel/vdso/Makefile
> -+++ b/arch/arm64/kernel/vdso/Makefile
> -@@ -54,7 +54,8 @@ $(obj-vdso): %.o: %.S FORCE
> -
> - # Actual build commands
> - quiet_cmd_vdsold = VDSOL $@
> -- cmd_vdsold = $(CC) $(c_flags) -Wl,-n -Wl,-T $^ -o $@
> -+ cmd_vdsold = $(CC) $(c_flags) -Wl,-n -Wl,-T $^ -o $@ \
> -+ $(if $(AFTER_LINK),;$(AFTER_LINK))
> - quiet_cmd_vdsoas = VDSOA $@
> - cmd_vdsoas = $(CC) $(a_flags) -c -o $@ $<
> -
> -diff --git a/arch/powerpc/kernel/vdso32/Makefile b/arch/powerpc/kernel/vdso32/Makefile
> -index 78a7449..c9592c0 100644
> ---- a/arch/powerpc/kernel/vdso32/Makefile
> -+++ b/arch/powerpc/kernel/vdso32/Makefile
> -@@ -44,7 +44,8 @@ $(obj-vdso32): %.o: %.S FORCE
> -
> - # actual build commands
> - quiet_cmd_vdso32ld = VDSO32L $@
> -- cmd_vdso32ld = $(CROSS32CC) $(c_flags) -o $@ -Wl,-T$(filter %.lds,$^) $(filter %.o,$^)
> -+ cmd_vdso32ld = $(CROSS32CC) $(c_flags) -o $@ -Wl,-T$(filter %.lds,$^) $(filter %.o,$^) \
> -+ $(if $(AFTER_LINK),; $(AFTER_LINK))
> - quiet_cmd_vdso32as = VDSO32A $@
> - cmd_vdso32as = $(CROSS32CC) $(a_flags) -c -o $@ $<
> -
> -diff --git a/arch/powerpc/kernel/vdso64/Makefile b/arch/powerpc/kernel/vdso64/Makefile
> -index 31107bf..96aded3 100644
> ---- a/arch/powerpc/kernel/vdso64/Makefile
> -+++ b/arch/powerpc/kernel/vdso64/Makefile
> -@@ -33,7 +33,8 @@ $(obj)/%.so: $(obj)/%.so.dbg FORCE
> -
> - # actual build commands
> - quiet_cmd_vdso64ld = VDSO64L $@
> -- cmd_vdso64ld = $(CC) $(c_flags) -o $@ -Wl,-T$(filter %.lds,$^) $(filter %.o,$^)
> -+ cmd_vdso64ld = $(CC) $(c_flags) -o $@ -Wl,-T$(filter %.lds,$^) $(filter %.o,$^) \
> -+ $(if $(AFTER_LINK),; $(AFTER_LINK))
> -
> - # install commands for the unstripped file
> - quiet_cmd_vdso_install = INSTALL $@
> -diff --git a/arch/s390/kernel/vdso32/Makefile b/arch/s390/kernel/vdso32/Makefile
> -index 6cc9478..94fb536 100644
> ---- a/arch/s390/kernel/vdso32/Makefile
> -+++ b/arch/s390/kernel/vdso32/Makefile
> -@@ -46,7 +46,8 @@ $(obj-vdso32): %.o: %.S
> -
> - # actual build commands
> - quiet_cmd_vdso32ld = VDSO32L $@
> -- cmd_vdso32ld = $(CC) $(c_flags) -Wl,-T $^ -o $@
> -+ cmd_vdso32ld = $(CC) $(c_flags) -Wl,-T $^ -o $@ \
> -+ $(if $(AFTER_LINK),; $(AFTER_LINK))
> - quiet_cmd_vdso32as = VDSO32A $@
> - cmd_vdso32as = $(CC) $(a_flags) -c -o $@ $<
> -
> -diff --git a/arch/s390/kernel/vdso64/Makefile b/arch/s390/kernel/vdso64/Makefile
> -index 2d54c18..a0e3e9d 100644
> ---- a/arch/s390/kernel/vdso64/Makefile
> -+++ b/arch/s390/kernel/vdso64/Makefile
> -@@ -46,7 +46,8 @@ $(obj-vdso64): %.o: %.S
> -
> - # actual build commands
> - quiet_cmd_vdso64ld = VDSO64L $@
> -- cmd_vdso64ld = $(CC) $(c_flags) -Wl,-T $^ -o $@
> -+ cmd_vdso64ld = $(CC) $(c_flags) -Wl,-T $^ -o $@ \
> -+ $(if $(AFTER_LINK),; $(AFTER_LINK))
> - quiet_cmd_vdso64as = VDSO64A $@
> - cmd_vdso64as = $(CC) $(a_flags) -c -o $@ $<
> -
> -diff --git a/arch/x86/entry/vdso/Makefile b/arch/x86/entry/vdso/Makefile
> -index d540966..eeb47b6 100644
> ---- a/arch/x86/entry/vdso/Makefile
> -+++ b/arch/x86/entry/vdso/Makefile
> -@@ -167,8 +167,9 @@ $(obj)/vdso32.so.dbg: FORCE \
> - quiet_cmd_vdso = VDSO $@
> - cmd_vdso = $(CC) -nostdlib -o $@ \
> - $(VDSO_LDFLAGS) $(VDSO_LDFLAGS_$(filter %.lds,$(^F))) \
> -- -Wl,-T,$(filter %.lds,$^) $(filter %.o,$^) && \
> -- sh $(srctree)/$(src)/checkundef.sh '$(NM)' '$@'
> -+ -Wl,-T,$(filter %.lds,$^) $(filter %.o,$^) \
> -+ $(if $(AFTER_LINK),; $(AFTER_LINK)) && \
> -+ sh $(srctree)/$(src)/checkundef.sh '$(NM)' '$@'
> -
> - VDSO_LDFLAGS = -fPIC -shared $(call cc-ldoption, -Wl$(comma)--hash-style=both) \
> - $(call cc-ldoption, -Wl$(comma)--build-id) -Wl,-Bsymbolic $(LTO_CFLAGS)
> -diff --git a/scripts/link-vmlinux.sh b/scripts/link-vmlinux.sh
> -index f742c65..526eee4 100755
> ---- a/scripts/link-vmlinux.sh
> -+++ b/scripts/link-vmlinux.sh
> -@@ -111,6 +111,10 @@ vmlinux_link()
> - -lutil -lrt -lpthread
> - rm -f linux
> - fi
> -+ if [ -n "${AFTER_LINK}" ]; then
> -+ /usr/lib/rpm/debugedit -b ${RPM_BUILD_DIR} -d /usr/src/debug -i ${2} \
> -+ > ${2}.id
> -+ fi
> - }
> -
> -
> ---
> -2.7.4
> -
> diff --git a/kernel.spec b/kernel.spec
> index 27c4fe13..06fcf3d4 100644
> --- a/kernel.spec
> +++ b/kernel.spec
> @@ -395,7 +395,16 @@ BuildRequires: pciutils-devel gettext ncurses-devel
> BuildConflicts: rhbuildsys(DiskFree) < 500Mb
> %if %{with_debuginfo}
> BuildRequires: rpm-build, elfutils
> -%define debuginfo_args --strict-build-id -r
> +BuildConflicts: rpm < 4.13.0.1-19
> +# Most of these should be enabled after more investigation
> +%undefine _include_minidebuginfo
> +%undefine _find_debuginfo_dwz_opts
> +%undefine _unique_build_ids
> +%undefine _unique_debug_names
> +%undefine _unique_debug_srcs
> +%global _find_debuginfo_opts -r
> +%global _missing_build_ids_terminate_build 1
> +%global _no_recompute_build_ids 1
> %endif
>
> %if %{signkernel}%{signmodules}
> @@ -492,9 +501,6 @@ Source5000: patch-4.%{base_sublevel}-git%{gitrev}.xz
>
> ## Patches needed for building this package
>
> -# build tweak for build ID magic, even for -vanilla
> -Patch001: kbuild-AFTER_LINK.patch
> -
> ## compile fixes
>
> # ongoing complaint, full discussion delayed until ksummit/plumbers
> @@ -706,7 +712,7 @@ This package provides debug information for the perf package.
> # symlinks because of the trailing nonmatching alternation and
> # the leading .*, because of find-debuginfo.sh's buggy handling
> # of matching the pattern against the symlinks file.
> -%{expand:%%global debuginfo_args %{?debuginfo_args} -p '.*%%{_bindir}/perf(\.debug)?|.*%%{_libexecdir}/perf-core/.*|.*%%{_libdir}/traceevent/plugins/.*|XXX' -o perf-debuginfo.list}
> +%{expand:%%global _find_debuginfo_opts %{?_find_debuginfo_opts} -p '.*%%{_bindir}/perf(\.debug)?|.*%%{_libexecdir}/perf-core/.*|.*%%{_libdir}/traceevent/plugins/.*|XXX' -o perf-debuginfo.list}
>
> %package -n python-perf
> Summary: Python bindings for apps which will manipulate perf events
> @@ -727,7 +733,7 @@ AutoReqProv: no
> This package provides debug information for the perf python bindings.
>
> # the python_sitearch macro should already be defined from above
> -%{expand:%%global debuginfo_args %{?debuginfo_args} -p '.*%%{python_sitearch}/perf.so(\.debug)?|XXX' -o python-perf-debuginfo.list}
> +%{expand:%%global _find_debuginfo_opts %{?_find_debuginfo_opts} -p '.*%%{python_sitearch}/perf.so(\.debug)?|XXX' -o python-perf-debuginfo.list}
>
>
> %endif # with_perf
> @@ -782,7 +788,7 @@ This package provides debug information for package kernel-tools.
> # symlinks because of the trailing nonmatching alternation and
> # the leading .*, because of find-debuginfo.sh's buggy handling
> # of matching the pattern against the symlinks file.
> -%{expand:%%global debuginfo_args %{?debuginfo_args} -p '.*%%{_bindir}/centrino-decode(\.debug)?|.*%%{_bindir}/powernow-k8-decode(\.debug)?|.*%%{_bindir}/cpupower(\.debug)?|.*%%{_libdir}/libcpupower.*|.*%%{_bindir}/turbostat(\.debug)?|.*%%{_bindir}/x86_energy_perf_policy(\.debug)?|.*%%{_bindir}/tmon(\.debug)?|.*%%{_bindir}/lsgpio(\.debug)?|.*%%{_bindir}/gpio-hammer(\.debug)?|.*%%{_bindir}/gpio-event-mon(\.debug)?|.*%%{_bindir}/iio_event_monitor(\.debug)?|.*%%{_bindir}/iio_generic_buffer(\.debug)?|.*%%{_bindir}/lsiio(\.debug)?|XXX' -o kernel-tools-debuginfo.list}
> +%{expand:%%global _find_debuginfo_opts %{?_find_debuginfo_opts} -p '.*%%{_bindir}/centrino-decode(\.debug)?|.*%%{_bindir}/powernow-k8-decode(\.debug)?|.*%%{_bindir}/cpupower(\.debug)?|.*%%{_libdir}/libcpupower.*|.*%%{_bindir}/turbostat(\.debug)?|.*%%{_bindir}/x86_energy_perf_policy(\.debug)?|.*%%{_bindir}/tmon(\.debug)?|.*%%{_bindir}/lsgpio(\.debug)?|.*%%{_bindir}/gpio-hammer(\.debug)?|.*%%{_bindir}/gpio-event-mon(\.debug)?|.*%%{_bindir}/iio_event_monitor(\.debug)?|.*%%{_bindir}/iio_generic_buffer(\.debug)?|.*%%{_bindir}/lsiio(\.debug)?|XXX' -o kernel-tools-debuginfo.list}
>
> %endif # with_tools
>
> @@ -802,7 +808,7 @@ AutoReqProv: no\
> %description %{?1:%{1}-}debuginfo\
> This package provides debug information for package %{name}%{?1:-%{1}}.\
> This is required to use SystemTap with %{name}%{?1:-%{1}}-%{KVERREL}.\
> -%{expand:%%global debuginfo_args %{?debuginfo_args} -p '/.*/%%{KVERREL}%{?1:[+]%{1}}/.*|/.*%%{KVERREL}%{?1:\+%{1}}(\.debug)?' -o debuginfo%{?1}.list}\
> +%{expand:%%global _find_debuginfo_opts %{?_find_debuginfo_opts} -p '/.*/%%{KVERREL}%{?1:[+]%{1}}/.*|/.*%%{KVERREL}%{?1:\+%{1}}(\.debug)?' -o debuginfo%{?1}.list}\
> %{nil}
>
> #
> @@ -1283,18 +1289,6 @@ cd ..
> %define sparse_mflags C=1
> %endif
>
> -%if %{with_debuginfo}
> -# This override tweaks the kernel makefiles so that we run debugedit on an
> -# object before embedding it. When we later run find-debuginfo.sh, it will
> -# run debugedit again. The edits it does change the build ID bits embedded
> -# in the stripped object, but repeating debugedit is a no-op. We do it
> -# beforehand to get the proper final build ID bits into the embedded image.
> -# This affects the vDSO images in vmlinux, and the vmlinux image in bzImage.
> -export AFTER_LINK=\
> -'sh -xc "/usr/lib/rpm/debugedit -b $$RPM_BUILD_DIR -d /usr/src/debug \
> - -i $@ > $@.id"'
> -%endif
> -
> cp_vmlinux()
> {
> eu-strip --remove-comment -o "$2" "$1"
> @@ -1506,12 +1500,8 @@ BuildKernel() {
> cp $RPM_BUILD_ROOT/lib/modules/$KernelVer/build/.config $RPM_BUILD_ROOT/lib/modules/$KernelVer/build/include/config/auto.conf
>
> %if %{with_debuginfo}
> - if test -s vmlinux.id; then
> - cp vmlinux.id $RPM_BUILD_ROOT/lib/modules/$KernelVer/build/vmlinux.id
> - else
> - echo >&2 "*** ERROR *** no vmlinux build ID! ***"
> - exit 1
> - fi
> + eu-readelf -n vmlinux | grep "Build ID" | awk '{print $NF}' > vmlinux.id
> + cp vmlinux.id $RPM_BUILD_ROOT/lib/modules/$KernelVer/build/vmlinux.id
>
> #
> # save the vmlinux file for kernel debugging into the kernel-debuginfo rpm
> @@ -1748,10 +1738,6 @@ popd
>
> %if %{with_debuginfo}
>
> -%define __debug_install_post \
> - /usr/lib/rpm/find-debuginfo.sh %{debuginfo_args} %{_builddir}/%{?buildsubdir}\
> -%{nil}
> -
> %ifnarch noarch
> %global __debug_package 1
> %files -f debugfiles.list debuginfo-common-%{_target_cpu}
> @@ -2178,6 +2164,9 @@ fi
> #
> #
> %changelog
> +* Mon May 01 2017 Laura Abbott <labbott@xxxxxxxxxxxxxxxxx>
> +- Update debuginfo generation
> +
> * Thu May 04 2017 Justin M. Forbes <jforbes@xxxxxxxxxxxxxxxxx> - 4.12.0-0.rc0.git3.1
> - Linux v4.11-7650-ga1be8ed
>
> --
> 2.12.2
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