Bug 1176238

Summary:	Resolve ppc64 symbols even without opd
Product:	[Fedora] Fedora	Reporter:	Mark Wielaard <mjw>
Component:	elfutils	Assignee:	Mark Wielaard <mjw>
Status:	NEW ---	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	unspecified	Docs Contact:
Priority:	unspecified
Version:	rawhide	CC:	fche, jakub, jan, jan.kratochvil, mjw, roland
Target Milestone:	---	Keywords:	FutureFeature, Reopened
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:		Doc Type:	Enhancement
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2016-07-19 12:34:03 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Mark Wielaard 2014-12-19 19:51:18 UTC

We test whether we can unwind through a "deleted" shared library of a remote process with the run-deleted.sh test. This work fine on ppc64. Except for resolving some of the addresses. The problem is that we sanity check a symbol address against the odp, if we don't have that, we don't resolve it in backends/ppc64_resolve_sym.c. For ELF images gotten through elf_remote_memory we don't have shdrs and so won't find the .odp.

For now the test has been disabled for ppc64 in tests/run-deleted.sh:

+# For PPC64 we need access to the OPD table which we get through the shdrs
+# (see backends/ppc64_init.c) but for the deleted-lib we only have phdrs.
+# So we don't have the name of the function. But since we should find
+# the EH_FRAME through phdrs just fine, we can unwind into main.
+if test "`uname -m`" != "ppc64"; then
+  grep -qw libfunc bt
+fi

We could/should probably be a little less paranoid and just fetch the data section and resolve anyway.

Comment 1 Jaroslav Reznik 2015-03-03 16:38:30 UTC

This bug appears to have been reported against 'rawhide' during the Fedora 22 development cycle.
Changing version to '22'.

More information and reason for this action is here:
https://fedoraproject.org/wiki/Fedora_Program_Management/HouseKeeping/Fedora22

Comment 2 Fedora End Of Life 2016-07-19 12:34:03 UTC

Fedora 22 changed to end-of-life (EOL) status on 2016-07-19. Fedora 22 is
no longer maintained, which means that it will not receive any further
security or bug fix updates. As a result we are closing this bug.

If you can reproduce this bug against a currently maintained version of
Fedora please feel free to reopen this bug against that version. If you
are unable to reopen this bug, please file a new report against the
current release. If you experience problems, please add a comment to this
bug.

Thank you for reporting this bug and we are sorry it could not be fixed.

Comment 3 Mark Wielaard 2016-07-19 12:47:18 UTC

This should have stayed open. Changing version to rawhide (it already has FutureFeature keyword) hopefully that helps.