From: "H. Peter Anvin" <hpa@zytor.com>
To: Mark Kettenis <mark.kettenis@xs4all.nl>
Cc: pinskia@gmail.com, teawater@gmail.com, tglx@linutronix.de,
mingo@redhat.com, x86@kernel.org, eparis@redhat.com,
ak@linux.intel.com, linux-kernel@vger.kernel.org,
gdb@sourceware.org
Subject: Re: [PATCH] Fix get ERESTARTSYS with m32 in x86_64 when debug by GDB
Date: Wed, 30 Apr 2014 09:35:00 -0700 [thread overview]
Message-ID: <53612634.2070802@zytor.com> (raw)
In-Reply-To: <201404301335.s3UDZX4J017978@glazunov.sibelius.xs4all.nl>
On 04/30/2014 06:35 AM, Mark Kettenis wrote:
>
> If (and only if) the goal of that TS_COMPAT flag solely is to trigger
> the error code sign-extension in arch/x86/asm/syscall.h:syscall_get_error(),
> we could work around to problem in GDB by checking "orig_ax" to see if
> we're continuing an interrupted system call and sign extend the error
> code in the real "eax" register if we are.
>
Well... this "if and only if" clause is false, although it might work
specifically in this context. I need to do a writeup about this... I
should try to do that today.
-hpa
next prev parent reply other threads:[~2014-04-30 16:35 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-04-21 16:19 [PATCH] Fix get ERESTARTSYS with m32 in x86_64 when debug by GDB Hui Zhu
2014-04-21 16:33 ` H. Peter Anvin
2014-04-30 3:44 ` Hui Zhu
2014-04-30 4:50 ` H. Peter Anvin
2014-04-30 5:08 ` Andrew Pinski
2014-04-30 5:10 ` H. Peter Anvin
2014-04-30 13:35 ` Mark Kettenis
2014-04-30 16:28 ` Hui Zhu
2014-04-30 16:35 ` Hui Zhu
2014-04-30 20:43 ` H. Peter Anvin
2014-04-30 16:35 ` H. Peter Anvin [this message]
2014-04-30 17:49 ` Pedro Alves
2014-04-30 20:44 ` H. Peter Anvin
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