From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <systemtap-return-18750-listarch-systemtap=sources.redhat.com@sourceware.org>
Received: (qmail 6142 invoked by alias); 2 Dec 2011 14:06:24 -0000
Received: (qmail 6133 invoked by uid 22791); 2 Dec 2011 14:06:22 -0000
X-SWARE-Spam-Status: No, hits=-2.8 required=5.0	tests=ALL_TRUSTED,AWL,BAYES_00
X-Spam-Check-By: sourceware.org
Received: from localhost (HELO sourceware.org) (127.0.0.1)    by sourceware.org (qpsmtpd/0.43rc1) with ESMTP; Fri, 02 Dec 2011 14:06:07 +0000
From: "mjw at redhat dot com" <sourceware-bugzilla@sourceware.org>
To: systemtap@sourceware.org
Subject: [Bug tapsets/13466] New: Failures with ARM EABI
Date: Fri, 02 Dec 2011 14:48:00 -0000
X-Bugzilla-Reason: AssignedTo
X-Bugzilla-Type: new
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: systemtap
X-Bugzilla-Component: tapsets
X-Bugzilla-Keywords:
X-Bugzilla-Severity: normal
X-Bugzilla-Who: mjw at redhat dot com
X-Bugzilla-Status: NEW
X-Bugzilla-Priority: P2
X-Bugzilla-Assigned-To: systemtap at sourceware dot org
X-Bugzilla-Target-Milestone: ---
X-Bugzilla-Changed-Fields:
Message-ID: <bug-13466-6586@http.sourceware.org/bugzilla/>
X-Bugzilla-URL: http://sourceware.org/bugzilla/
Auto-Submitted: auto-generated
Content-Type: text/plain; charset="UTF-8"
MIME-Version: 1.0
Mailing-List: contact systemtap-help@sourceware.org; run by ezmlm
Precedence: bulk
List-Id: <systemtap.sourceware.org>
List-Subscribe: <mailto:systemtap-subscribe@sourceware.org>
List-Post: <mailto:systemtap@sourceware.org>
List-Help: <mailto:systemtap-help@sourceware.org>, <http://sourceware.org/lists.html#faqs>
Sender: systemtap-owner@sourceware.org
X-SW-Source: 2011-q4/txt/msg00283.txt.bz2

http://sourceware.org/bugzilla/show_bug.cgi?id=13466

             Bug #: 13466
           Summary: Failures with ARM EABI
           Product: systemtap
           Version: unspecified
            Status: NEW
          Severity: normal
          Priority: P2
         Component: tapsets
        AssignedTo: systemtap@sourceware.org
        ReportedBy: mjw@redhat.com
    Classification: Unclassified


On ARM kernels build with EABI we see the following failures:

Running /root/systemtap/testsuite/systemtap.context/context.exp ...
FAIL: int64 function arguments -- numeric
FAIL: int64 function arguments -- numeric --kelf --ignore-dwarf

This is because these tests pass 'long long' arguments.
It seems this differs between ARM calling conventions, newer calling
conventions mandate: "64-bit function parameters passed in registers are
aligned to an even-numbered register instead of using the next available pair."

This could be fixed by taking this into account in tapset/arm/registers.stp
u/s64_arg. But that would break other arm calling conventions.

(Also this would move some of the arguments out of registers and onto the
stack, which arm/registers.stp arch functions aren't yet prepared to handle.)

-- 
Configure bugmail: http://sourceware.org/bugzilla/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the assignee for the bug.