From: Pedro Alves <pedro@codesourcery.com>
To: gdb-patches@sourceware.org
Cc: Yao Qi <yao@codesourcery.com>, Mark Kettenis <mark.kettenis@xs4all.nl>
Subject: Re: [patch, testsuite] gdb.base/savedregs.exp: SIGSEGV -> SIGILL
Date: Thu, 09 Jun 2011 14:25:00 -0000 [thread overview]
Message-ID: <201106091525.28900.pedro@codesourcery.com> (raw)
In-Reply-To: <4DF0C613.70101@codesourcery.com>
On Thursday 09 June 2011 14:09:39, Yao Qi wrote:
> On 06/09/2011 07:17 PM, Mark Kettenis wrote:
> >> Date: Thu, 09 Jun 2011 17:28:09 +0800
> >> From: Yao Qi <yao@codesourcery.com>
> >>
> >> In current gdb.base/savedregs.exp, signal handler is installed for
> >> signal SIGSEGV, and SIGSEGV is trigger by `*(char *)0 = 0;'. However,
> >> on non-mmu uclinux system, writing to an address 0x0 doesn't trigger
> >> SIGSEGV.
> >>
> >> In my patch, SIGILL is chosen to replace SIGSEGV. One assumption here
> >> is that 0xffff is an invalid instruction on all ports.
> >
> > Please don't do this. You're changing the test significantly. And
>
> I don't think the test is changed *significantly*. The purpose of
> writing to zero, at least in this case, is to trigger a signal, and
> check the register in signal trampoline frame. Either SIGSEGV or SIGILL
> meets this need.
You made me go look for the original explanation behind the
test :-)
<http://sourceware.org/ml/gdb-patches/2004-10/msg00475.html>
--
Pedro Alves
next prev parent reply other threads:[~2011-06-09 14:25 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-06-09 9:28 Yao Qi
2011-06-09 10:08 ` Andreas Schwab
2011-06-09 10:53 ` Yao Qi
2011-06-09 11:19 ` Mark Kettenis
2011-06-09 11:41 ` Pedro Alves
2011-06-09 13:25 ` Yao Qi
2011-06-09 13:10 ` Yao Qi
2011-06-09 14:25 ` Pedro Alves [this message]
2011-06-20 4:13 ` [patch V2, testsuite] gdb.base/savedregs.exp: SIGSEGV -> SIGALRM Yao Qi
2011-06-20 7:03 ` Mark Kettenis
2011-06-20 8:26 ` Yao Qi
2011-06-20 11:12 ` Mark Kettenis
2011-06-20 15:07 ` Yao Qi
2011-06-20 15:14 ` Paul Koning
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