[PATCH 1/2] x86-64/setcontext: Pop the pointer into %rdx after syscall

[H.J. Lu]

On Sun, Apr 29, 2018 at 2:03 PM, Florian Weimer <fweimer@redhat.com> wrote:
> On 04/26/2018 02:17 PM, H.J. Lu wrote:
>>
>> +       /* Pop the pointer into RDX which is preserved by the syscall.  */
>> +       popq    %rdx
>
>
> Sorry, the comment is a bit unclear.  Why do you need to restore %rdx if it
> is preserved by the system call?  Maybe it becomes clearer with a future
> change?
>

Here is the patch to use it:

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


-- 
H.J.