For -arch 32:

testStepSigReturn(frysk.proc.TestTaskObserverInstructionSigReturn)junit.framework.AssertionFailedError:
Wrong signal received: 5
   at frysk.proc.TestTaskObserverInstructionSigReturn.updateSignaled(TestRunner)
   at frysk.proc.Task.notifySignaled(TestRunner)
   at frysk.proc.live.LinuxTaskState$Running.handleSignaledEvent(TestRunner)
   at frysk.proc.live.LinuxTaskState$Stepping.handleSignaledEvent(TestRunner)
   at frysk.proc.live.LinuxTaskState$Stepping.handleTrappedEvent(TestRunner)
   at frysk.proc.live.LinuxTask.processTrappedEvent(TestRunner)
   at frysk.proc.live.LinuxWaitBuilder.stopped(TestRunner)
   at frysk.sys.Wait.wait(TestRunner)
   at frysk.sys.Wait.waitAll(TestRunner)
   at frysk.event.WaitEventLoop.block(TestRunner)
   at frysk.event.EventLoop.runEventLoop(TestRunner)
   at frysk.event.EventLoop.runPolling(TestRunner)
   at frysk.testbed.TestLib.assertRunUntilStop(TestRunner)
   at frysk.testbed.TestLib.assertRunUntilStop(TestRunner)
   at frysk.proc.TestTaskObserverInstructionSigReturn.testStepSigReturn(TestRunner)
   at frysk.junit.Runner.runCases(TestRunner)
   at frysk.junit.Runner.runTestCases(TestRunner)
   at TestRunner.main(TestRunner)

the log shows:

FINE: entering peekFully, caret: 0x380, off: 0x0, len: 0x4

28-Dec-07 10:32:19 PM inua.eio.ByteBuffer peekFully
FINE: exiting peekFully

28-Dec-07 10:32:19 PM inua.eio.ByteBuffer peekFully
FINE: entering peekFully, caret: 0x80, off: 0x0, len: 0x4

28-Dec-07 10:32:19 PM inua.eio.ByteBuffer peekFully
FINE: exiting peekFully

28-Dec-07 10:32:19 PM frysk.proc.Task notifyCodeBreakpoint
FINE: {frysk.proc.live.LinuxTask@2fa2d355,pid=14074,tid=14074,state=stepping}
notifyCodeBreakpoint(134,514,034)

28-Dec-07 10:32:19 PM inua.eio.ByteBuffer peekFully
FINE: entering peekFully, caret: 0x80, off: 0x0, len: 0x4

28-Dec-07 10:32:19 PM inua.eio.ByteBuffer peekFully
FINE: exiting peekFully

28-Dec-07 10:32:19 PM frysk.proc.Task getMemory
FINE: {frysk.proc.live.LinuxTask@2fa2d355,pid=14074,tid=14074,state=stepping}
entering get memory frysk.proc.live.LogicalMemoryBuffer@2f89d735

28-Dec-07 10:32:19 PM frysk.proc.Task getMemory
FINE: {frysk.proc.live.LinuxTask@2fa2d355,pid=14074,tid=14074,state=stepping}
exiting get memory frysk.proc.live.LogicalMemoryBuffer@2f89d735

28-Dec-07 10:32:19 PM frysk.proc.live.LinuxTaskState$Stepping handleSignaledEvent
FINE: {frysk.proc.live.LinuxTask@2fa2d355,pid=14074,tid=14074,state=stepping}
handleSignaledEvent, signal: 5

28-Dec-07 10:32:19 PM frysk.proc.live.LinuxTaskState$Running handleSignaledEvent
FINE: {frysk.proc.live.LinuxTask@2fa2d355,pid=14074,tid=14074,state=stepping}
handleSignaledEvent, signal: 5

28-Dec-07 10:32:19 PM frysk.proc.Task notifySignaled
FINE: {frysk.proc.live.LinuxTask@2fa2d355,pid=14074,tid=14074,state=stepping}
notifySignaled(int)

--

notice reasoning that it got a sig-trap for no reason.

machine is amd64 running kernel 2.6.23.9-85.fc8; doesn't occur on intel64
running kernel 2.6.23.1-42.fc8