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Re: [PATCH 2/2] x86-64/swapcontext: Restore the pointer into %rdx after syscall

From: "H.J. Lu" <hjl dot tools at gmail dot com>
To: Florian Weimer <fweimer at redhat dot com>
Cc: GNU C Library <libc-alpha at sourceware dot org>
Date: Sun, 29 Apr 2018 15:08:03 -0700
Subject: Re: [PATCH 2/2] x86-64/swapcontext: Restore the pointer into %rdx after syscall
References: <20180426121744.GB30766@intel.com> <09599cf2-6eca-1052-1788-35dd3b2e5225@redhat.com>

On Sun, Apr 29, 2018 at 2:10 PM, Florian Weimer <fweimer@redhat.com> wrote:
> On 04/26/2018 02:17 PM, H.J. Lu wrote:
>>
>> +       /* Restore destroyed register into RDX which is preserved by
>> +          the syscall.  */
>> +       movq    %r12, %rdx
>
>
> Again, this comment does not make sense without the other upcoming changes.
>

Here is the patch to use it:

https://github.com/hjl-tools/glibc/commit/182ce0987aada98b2d606276d4aa4fbd2527031b

-- 
H.J.

References:
- [PATCH 2/2] x86-64/swapcontext: Restore the pointer into %rdx after syscall
  - From: H.J. Lu
- Re: [PATCH 2/2] x86-64/swapcontext: Restore the pointer into %rdx after syscall
  - From: Florian Weimer

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