On Fri, 15 Apr 2016 15:49:20 +0800 Zakirasafi wrote:
> The following code is for side channel attack on xen hypevisor. In this
> code I am having problem in understanding the highlighted red line. In the
> line what ".byte 15, byte 49" do???
You can use this trick in the future:
$ printf "\xf\x31
Hi Zakirasafi,
> unsigned int timestamp(void)
> {
> unsigned int bottom;
> unsigned int top;
> *asm volatile(".byte 15;.byte 49" : "=a"(bottom),"=d"(top)); return bottom;*
> }
It is ‘RDTSC’ instruction.
Besides, I am happy that someone is also working on side channel attack on Xen.
Maybe we can
Hello
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On Fri, Apr 15, 2016 at 03:49:20PM +0800, Zakirasafi wrote:
> Dear All
> The following code is for side channel attack on xen hypevisor. In this
> code I am having problem in understanding the highlighted red line. In the
> line what ".byte 15, byte 49" do???
>
