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Date:      Tue, 01 Jun 2021 20:56:43 +0000
From:      bugzilla-noreply@freebsd.org
To:        amd64@FreeBSD.org
Subject:   [Bug 209821] UEFI - installation media hangs when booting on ASUS P6P67 DELUXE
Message-ID:  <bug-209821-17361-17vWvDzRPG@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-209821-17361@https.bugs.freebsd.org/bugzilla/>
References:  <bug-209821-17361@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D209821

David Sebek <dasebek@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
 Attachment #225333|0                           |1
        is obsolete|                            |

--- Comment #41 from David Sebek <dasebek@gmail.com> ---
Created attachment 225480
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=3D225480&action=
=3Dedit
[PATCH] efi: loader: Fix a boot freeze on some amd64 systems

Fix an issue when the boot process could freeze shortly after
displaying EFI framebuffer information on some amd64 systems.

Instead of calling the efi_copy_finish function from amd64_tramp,
include the copy instructions in the trampoline code itself.
This avoids boot hangs and restarts in the cases when
the EFI loader code and/or data segments happen to be located
at a memory location that is overwritten during the copy process.

Also, add missing return value checks. Add a new function that
prints a warning message if there is a danger that the bootloader
may attempt to overwrite memory pages of a type that should not
be overwritten.

--=20
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