[Bug runtime/5648] New: Unaligned access to memory in _stp_vsnprintf() on ia64

["mhiramat at redhat dot com" <sourceware-bugzilla at sourceware dot org>]

When I ran testsuite/systemtap.printf/bin4.stp and bin5.stp on ia64, I got
"kernel unaligned access" messages as below;

---(bin4.stp)
bin4: systemtap: 0.6/Red Hat elfutils 0.125, base: a0000002083b4000, memory:
167908+71616+13696+14000+696673 data+text+ctx+io+glob, probes: 1
kernel unaligned access to 0xe0000007914b4026, ip=0xa0000002083bd4c1
kernel unaligned access to 0xe0000007914b402d, ip=0xa0000002083bd4c1
---

---(bin5.stp)
bin5: systemtap: 0.6/Red Hat elfutils 0.125, base: a0000002083b4000, memory:
167908+71616+13696+14000+696673 data+text+ctx+io+glob, probes: 1
kernel unaligned access to 0xe0000007a29a0004, ip=0xa0000002083bd631
kernel unaligned access to 0xe0000007a29a000c, ip=0xa0000002083bd631
kernel unaligned access to 0xe0000007a29a0014, ip=0xa0000002083bd631
kernel unaligned access to 0xe0000007a29a001c, ip=0xa0000002083bd631
kernel unaligned access to 0xe0000007a29a0024, ip=0xa0000002083bd631
---

And both ip was in _stp_vsnprintf().
---
$ nm bin4.ko | sort
...
0000000000008560 T _stp_vsnprintf
0000000000009720 T _stp_vscnprintf
...
$ nm bin5.ko | sort
...
0000000000008540 T _stp_vsnprintf
0000000000009700 T _stp_vscnprintf
---

-- 
           Summary: Unaligned access to memory in _stp_vsnprintf() on ia64
           Product: systemtap
           Version: unspecified
            Status: NEW
          Severity: minor
          Priority: P3
         Component: runtime
        AssignedTo: systemtap at sources dot redhat dot com
        ReportedBy: mhiramat at redhat dot com


http://sourceware.org/bugzilla/show_bug.cgi?id=5648

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