Subject: Re: Cross-building
To: None <email@example.com>
From: Mark Kettenis <firstname.lastname@example.org>
Date: 10/22/2003 23:04:36
Date: Tue, 21 Oct 2003 13:52:27 +0200
From: Frank van der Linden <email@example.com>
On Mon, Oct 20, 2003 at 11:43:26PM +0200, Mark Kettenis wrote:
> The behaviour has changed. The SIGALRM test pass now, but
> unfortunately there is a test further down in signal.exp that hangs
> the machine; I can't ping the machine and the console is dead. I'll
> need to investigate this, since I don't even know exactlt what test is
Let me know if I can do anything to help, or how to reproduce the
problem, so that I can debug the possible kernel issue lurking here.
I appreciate your work on this.
I have experimented a bit and have pin-pointed the test that crashes
the machine. The following scenario can be used to reproduce the problem:
$ gdb sandbox/virgin-gdb/obj/gdb/testsuite/gdb.base/run
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This GDB was configured as "x86_64--netbsd"...
(gdb) b main
Breakpoint 1 at 0x400a9f: file ../../../src/gdb/testsuite/gdb.base/run.c, line 59.
Starting program: /home/kettenis/sandbox/virgin-gdb/obj/gdb/testsuite/gdb.base/run
Breakpoint 1, main (argc=1, argv=0x7f7ffffffa48, envp=0x7f7ffffffa58)
59 ../../../src/gdb/testsuite/gdb.base/run.c: No such file or directory.
(gdb) signal 5
Continuing with signal SIGTRAP.
At this point the machine crashes. Sometimes I get a message on the
console that starts with:
fatal protection fault in supervisor mode
which corresponds to the
instruction in locore.S:switch_exited.
The system call that crashes the machine is:
ptrace (PT_CONTINUE, PID, 1, SIGTRAP);
I also tried a few other signals, and it seems that only those signals
whose default behaviour is to produce a core dump (i.e. SIGQUIT,
SIGILL, SIGTRAP, SIGABRT, SIGEMT, SIGFPE, SIGBUS, SIGSEGV, SIGSYS)
produce the crash.
Hope this bit of info helps.