From: Daniel Jacobowitz <drow@false.org>
To: Bill Gatliff <bgat@billgatliff.com>
Cc: gdb@sourceware.org, linuxppc-embedded@ozlabs.org
Subject: Re: Gdbserver syscall clobber
Date: Wed, 18 Jul 2007 14:31:43 -0400 [thread overview]
Message-ID: <20070718183143.GA25324@caradoc.them.org> (raw)
In-Reply-To: <469E550E.5080905@billgatliff.com>
On Wed, Jul 18, 2007 at 12:59:42PM -0500, Bill Gatliff wrote:
> Now, I'm a little rusty on PPC asm (I've been doing a lot of ARM
> lately), but it looks to me like the kernel is setting bit 0 in CR0
> (oris r10, r10, 0x1000) a.k.a LT, but the user side is looking at CR0
> (bnslr+) bit 3 a.k.a. SO. Or maybe the other way around, I'm not sure
> after reading Sections 1.2 and 2.1 of the Programming Environments manual.
It's not checking for restart here - userspace isn't supposed to have to.
It's probably checking for error. Check for the bit of kernel code
that's supposed to back you up two instructions.
--
Daniel Jacobowitz
CodeSourcery
next prev parent reply other threads:[~2007-07-18 19:00 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-07-16 15:43 Gdbserver syscall clobber Bill Gatliff
2007-07-16 15:53 ` Daniel Jacobowitz
2007-07-18 17:42 ` Bill Gatliff
2007-07-18 17:59 ` Bill Gatliff
2007-07-18 18:31 ` Daniel Jacobowitz [this message]
2007-07-23 15:37 ` Bill Gatliff
2007-07-23 15:38 ` Bill Gatliff
2007-07-23 16:06 ` Bill Gatliff
2007-07-23 16:15 ` Daniel Jacobowitz
2007-07-26 16:28 ` Bill Gatliff
2007-07-23 16:19 ` Andreas Schwab
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