Re: [PATCH 8/8] x86: add comments about various syscall instructions, no code changes
From: Denys Vlasenko
Date: Fri Aug 08 2014 - 12:18:47 EST
On 08/05/2014 09:58 PM, Oleg Nesterov wrote:
> On 08/05, Denys Vlasenko wrote:
>> This patch adds comments which explain in detail
>> what registers are modified by each of these instructions.
>> The comments are placed immediately before corresponding
>> entry and exit points.
> This is great ;)
I just discovered that I misunderstood how _exactly_
SYSCALL decides whether to save rflags to r11 or not.
(Wrote an actual testcase for 32bit -> 64bit SYSCALL
transition. Practice always trumps theory, doesn't it? ;)
So I had to fix my comments in this patch. I guess
I need to send v4 of the patchset now...
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