For other signals like SEGV and BUS and INTR, I had to re-enable the
signal by calling signal() after longjmp as specified in the signal(2)
manpage for Linux:
"Unlike on BSD systems, signals under Linux are reset to their default
behavior when raised. However, if you include <bsd/signal.h> instead
of <signal.h> then signal is redefined as __bsd_signal and signal has
the BSD semantics. Both versions of signal are library routines built
on top of sigaction(2)."
I changed your example program to restore the signal handler routine
once the signal is raised and it worked as you described. I did not
try using <bsd/signal.h>. You may wish to try that. I prefer just
restoring the signal handler, since this avoid #ifdefs for different
platorms.
----ranga [off-list ref]
** Sent via the linuxppc-dev mail list. See http://lists.linuxppc.org/
I'm sorry to be dense, but could you send me your modified version of my
test program?
In an earlier run, I was calling signal inside the signal handler before
the longjmp, and it had no effect, so I removed the code to make the
example as simple as possible. It's possible I did it wrong, but if you
could send me your changes, I'd be grateful.
Thanks,
Pete.
On Wed, 15 Mar 2000, Sriranga Veeraraghavan wrote:
For other signals like SEGV and BUS and INTR, I had to re-enable the
signal by calling signal() after longjmp as specified in the signal(2)
manpage for Linux:
"Unlike on BSD systems, signals under Linux are reset to their default
behavior when raised. However, if you include <bsd/signal.h> instead
of <signal.h> then signal is redefined as __bsd_signal and signal has
the BSD semantics. Both versions of signal are library routines built
on top of sigaction(2)."
I changed your example program to restore the signal handler routine
once the signal is raised and it worked as you described. I did not
try using <bsd/signal.h>. You may wish to try that. I prefer just
restoring the signal handler, since this avoid #ifdefs for different
platorms.
----ranga [off-list ref]
** Sent via the linuxppc-dev mail list. See http://lists.linuxppc.org/