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Update debuginfo generation 

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with this and it's forward looking calls are now out of date.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.
This commit is contained in:
Laura Abbott 2017-05-23 10:53:02 -07:00
parent 11ddff0f58
commit debc7c545a
2 changed files with 19 additions and 156 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

126
kbuild-AFTER_LINK.patch
View File

@ -1,126 +0,0 @@
From 649d991ca7737dd227f2a1ca4f30247daf6a7b4b Mon Sep 17 00:00:00 2001
From: Roland McGrath <roland@redhat.com>
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@redhat.com>
---
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

49
kernel.spec
View File

@ -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
@ -689,7 +695,7 @@ 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
@ -710,7 +716,7 @@ 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
@ -765,7 +771,7 @@ 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
@ -785,7 +791,7 @@ 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}
#
@ -1266,18 +1272,6 @@ 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"
@ -1489,12 +1483,8 @@ 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
@ -1731,10 +1721,6 @@ 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}
@ -2161,6 +2147,9 @@ fi
#
#
%changelog
* Tue May 23 2017 Laura Abbott <labbott@fedoraproject.org>
- Update debuginfo generation
* Tue May 23 2017 Justin M. Forbes <jforbes@fedoraproject.org> - 4.12.0-0.rc2.git1.1
- Linux v4.12-rc2-49-gfde8e33
- Reenable debugging options.