[Bug 209821] UEFI - installation media hangs when booting on ASUS P6P67 DELUXE
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Date: Tue, 01 Jun 2021 20:56:43 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=209821
David Sebek <dasebek@gmail.com> changed:
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Attachment #225333|0 |1
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--- Comment #41 from David Sebek <dasebek@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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