lkml.org 
[lkml]   [2014]   [Feb]   [9]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH v13 8/9] Add 32 bit VDSO time support for 32 bit kernel
On 02/09/2014 03:45 AM, Stefani Seibold wrote:
>>
>> Yes the syscall does, but the vsyscall stub does not (for the !0x80 case)
>
> I cross check all kinds of vsyscall and all do save the ECX registers.
>
> So IMHO i see no register modification other than EAX, which is declared
> as the output register in the asm() directive.
>

That is, indeed, correct, as the 32-bit vsyscall stubs are explicitly
designed to be drop-in replacements for the int $0x80 instruction.

-hpa




\
 
 \ /
  Last update: 2014-02-09 22:21    [W:0.060 / U:0.028 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site