Re: [Xen-devel] [PATCH v2] xen/x86: Zero out .bss for PV guests

From	Boris Ostrovsky <boris.ostrovsky@oracle.com>
Newsgroups	linux.kernel
Subject	Re: [Xen-devel] [PATCH v2] xen/x86: Zero out .bss for PV guests
Date	2016-02-24 18:50 +0100
Message-ID	<r5LJx-7WC-29@gated-at.bofh.it> (permalink)
References	<r5Jy2-6wc-35@gated-at.bofh.it> <r5Lqb-7M2-27@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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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 too in another message.

-boris

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[PATCH v2] xen/x86: Zero out .bss for PV guests Boris Ostrovsky <boris.ostrovsky@oracle.com> - 2016-02-24 16:30 +0100
  Re: [PATCH v2] xen/x86: Zero out .bss for PV guests Brian Gerst <brgerst@gmail.com> - 2016-02-24 17:10 +0100
    Re: [PATCH v2] xen/x86: Zero out .bss for PV guests Boris Ostrovsky <boris.ostrovsky@oracle.com> - 2016-02-24 17:40 +0100
  Re: [Xen-devel] [PATCH v2] xen/x86: Zero out .bss for PV guests Andrew Cooper <andrew.cooper3@citrix.com> - 2016-02-24 18:30 +0100
    Re: [Xen-devel] [PATCH v2] xen/x86: Zero out .bss for PV guests Boris Ostrovsky <boris.ostrovsky@oracle.com> - 2016-02-24 18:50 +0100

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