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In-Reply-To: <YmX2nJyeykpODEsB@paquier.xyz>
From: Niyas Sait <niyas.sait@linaro.org>
Date: Mon, 9 May 2022 12:44:22 +0100
Message-ID: 
 <CAFPTBD-+YT0wZTh_KJHK+G_DfA9+Y6FrkACkCFz8d4+BZjacuQ@mail.gmail.com>
Subject: Re: [PATCH] Add native windows on arm64 support
To: Michael Paquier <michael@paquier.xyz>
Cc: Andres Freund <andres@anarazel.de>, Tom Lane <tgl@sss.pgh.pa.us>,
	Thomas Munro <thomas.munro@gmail.com>, Julien Rouhaud <rjuju123@gmail.com>,
	PostgreSQL Hackers <pgsql-hackers@lists.postgresql.org>
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> Thanks for doing that!  Your post is just a couple of days old, let's
> see if we get a reply on that.

Microsoft updated documentation [1] and clarified that ASLR cannot be
disabled for Arm64 targets.

Because ASLR can't be disabled on ARM, ARM64, or ARM64EC architectures,
> /DYNAMICBASE:NO isn't supported for these targets.


Thanks
Niyas

[1]
https://docs.microsoft.com/en-us/cpp/build/reference/dynamicbase?view=msvc-170


On Mon, 25 Apr 2022 at 02:17, Michael Paquier <michael@paquier.xyz> wrote:

> On Thu, Apr 21, 2022 at 10:21:04AM +0100, Niyas Sait wrote:
> > The following error occurs:
> >
> > LINK : fatal error LNK1246: '/DYNAMICBASE:NO' not compatible with 'ARM64'
> > target machine; link without '/DYNAMICBASE:NO
>
> Okay, that's interesting.  In light of things like 7f3e17b, that may
> be annoying.  Perhaps newer Windows versions are able to handle that
> better.  I am wondering if it would be worth re-evaluating this
> change, and attempt to re-enable that in environments other than
> arm64.  This could become interesting if we consider that there have
> been talks to cut the support for a bunch of Windows versions to focus
> on the newer ones only.
>
> > This seems to be a deliberate restriction for Arm64 targets. However, no
> > references were provided. To clarify, I have posted a question [1] on the
> > community channel of Visual Studio.
>
> Thanks for doing that!  Your post is just a couple of days old, let's
> see if we get a reply on that.
> --
> Michael
>

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<div dir=3D"ltr">&gt; Thanks for doing that!=C2=A0 Your post is just a coup=
le of days old, let&#39;s<br>&gt; see if we get a reply on that.<br><div><b=
r></div><div>Microsoft updated documentation [1] and clarified that ASLR ca=
nnot be disabled for Arm64 targets.</div><div><br></div><div><blockquote st=
yle=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padd=
ing-left:1ex" class=3D"gmail_quote">Because ASLR can&#39;t be disabled on A=
RM, ARM64, or ARM64EC architectures,=C2=A0<span style=3D"box-sizing:inherit=
;outline-color:inherit;font-weight:600"><code style=3D"box-sizing:inherit;o=
utline-color:inherit;font-family:SFMono-Regular,Consolas,&quot;Liberation M=
ono&quot;,Menlo,Courier,monospace;font-size:13.6px;direction:ltr;border-rad=
ius:3px;padding:0.1em 0.2em">/DYNAMICBASE:NO</code></span>=C2=A0isn&#39;t s=
upported for these targets.</blockquote></div><div><br></div><div>Thanks</d=
iv><div>Niyas</div><div><br></div><div>[1] <a href=3D"https://docs.microsof=
t.com/en-us/cpp/build/reference/dynamicbase?view=3Dmsvc-170">https://docs.m=
icrosoft.com/en-us/cpp/build/reference/dynamicbase?view=3Dmsvc-170</a></div=
><div><br></div></div><br><div class=3D"gmail_quote"><div dir=3D"ltr" class=
=3D"gmail_attr">On Mon, 25 Apr 2022 at 02:17, Michael Paquier &lt;<a href=
=3D"mailto:michael@paquier.xyz">michael@paquier.xyz</a>&gt; wrote:<br></div=
><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border=
-left:1px solid rgb(204,204,204);padding-left:1ex">On Thu, Apr 21, 2022 at =
10:21:04AM +0100, Niyas Sait wrote:<br>
&gt; The following error occurs:<br>
&gt; <br>
&gt; LINK : fatal error LNK1246: &#39;/DYNAMICBASE:NO&#39; not compatible w=
ith &#39;ARM64&#39;<br>
&gt; target machine; link without &#39;/DYNAMICBASE:NO<br>
<br>
Okay, that&#39;s interesting.=C2=A0 In light of things like 7f3e17b, that m=
ay<br>
be annoying.=C2=A0 Perhaps newer Windows versions are able to handle that<b=
r>
better.=C2=A0 I am wondering if it would be worth re-evaluating this<br>
change, and attempt to re-enable that in environments other than<br>
arm64.=C2=A0 This could become interesting if we consider that there have<b=
r>
been talks to cut the support for a bunch of Windows versions to focus<br>
on the newer ones only.<br>
<br>
&gt; This seems to be a deliberate restriction for Arm64 targets. However, =
no<br>
&gt; references were provided. To clarify, I have posted a question [1] on =
the<br>
&gt; community channel of Visual Studio.<br>
<br>
Thanks for doing that!=C2=A0 Your post is just a couple of days old, let=
9;s<br>
see if we get a reply on that.<br>
--<br>
Michael<br>
</blockquote></div>

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