[Bug 209821] UEFI - installation media hangs when booting on ASUS P6P67 DELUXE

From: <bugzilla-noreply_at_freebsd.org>
Date: Tue, 01 Jun 2021 20:56:43 +0000
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=209821

David Sebek <dasebek_at_gmail.com> changed:

           What    |Removed                     |Added
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 Attachment #225333|0                           |1
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--- Comment #41 from David Sebek <dasebek_at_gmail.com> ---
Created attachment 225480
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=225480&action=edit
[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.

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Received on Tue Jun 01 2021 - 20:56:43 UTC

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