Re: [PATCH] Support a protection scheme which reset the GS selector - v2

[Sergey Guralnik]

On 2013-02-07 17:00, Alessandro Pignotti wrote:
> - opcode=(unsigned char*)context->Eip;
> - if (*opcode==0x65 && /* GS segment instruction prefix */
> -
>    context->SegGs!=ntdll_get_thread_data()->gs)

Segment-override prefix may be preceded by repeat or operand-size 
override prefixes.
So instruction that refers to GS-segment doesn't always starts with 
0x65.