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From: David Mosberger <davidm@hpl.hp.com>
To: linux-ia64@vger.kernel.org
Subject: Re: [Linux-ia64] Bug in signal handling
Date: Mon, 03 Dec 2001 03:15:16 +0000	[thread overview]
Message-ID: <marc-linux-ia64-105590698805575@msgid-missing> (raw)
In-Reply-To: <marc-linux-ia64-105590698805573@msgid-missing>

>>>>> On 02 Dec 2001 23:05:29 +0100, Andreas Schwab <schwab@suse.de> said:

  Andreas> Then send both SIGUSR1 and SIGUSR2 to the process from
  Andreas> another terminal.  If they arrive close enough then the
  Andreas> first signal handler will be interupted at GATE_ADDR by the
  Andreas> second handler.  But ia64_do_signal is again called with
  Andreas> in_syscall = 1, and it will call ia64_decrement_ip before
  Andreas> setting up the signal handler frame.  Thus when the second
  Andreas> signal returns then rt_sigreturn it will return to
  Andreas> GATE_ADDR - 16 and crashes.

I think I know what the problem is.  If I'm right, then, oddly enough,
I discovered the same bug just yesterday (while proof-reading the
book, nevertheless... ;-).

Anyhow, I'll look into it on Monday.

Thanks,

	--david


  reply	other threads:[~2001-12-03  3:15 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2001-12-02 22:05 [Linux-ia64] Bug in signal handling Andreas Schwab
2001-12-03  3:15 ` David Mosberger [this message]
2001-12-04 19:53 ` David Mosberger
2001-12-05  1:14 ` Richard Henderson
2001-12-05  2:15 ` David Mosberger

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