On 02/24/2016 12:26 PM, Andrew Cooper wrote:
On 24/02/16 15:19, Boris Ostrovsky wrote:
+ /* Clear .bss */
+ xor REG(ax),REG(ax)
If we are nitpicking,
This should be xor %eax, %eax even in 64bit. Functionally identical,
and shorter to encode.
Right, Brian Gerst pointed this out t
On 24/02/16 15:19, Boris Ostrovsky wrote:
> Baremetal kernels clear .bss early in the boot but Xen PV guests don't
> execute that code. They have been able to run without problems because
> Xen domain builder happens to give out zeroed pages. However, since this
> is not really guaranteed, .bss sho
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