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Michael Brown 6e4196baff [efi] Prescroll the display after a failed wrapped ExitBootServices() call 
On some systems (observed with an HP Elitebook 840 G10), writing
console output that happens to cause the display to scroll will modify
the system memory map.  This causes builds with DEBUG=efi_wrap to
typically fail to boot, since the debug output from the wrapped
ExitBootServices() call itself is sufficient to change the memory map
and therefore cause ExitBootServices() to fail due to an invalid
memory map key.

Work around these UEFI firmware bugs by prescrolling the display after
a failed ExitBootServices() attempt, in order to minimise the chance
that further scrolling will happen during the subsequent attempt.

Signed-off-by: Michael Brown <mcb30@ipxe.org>
 		2025-03-18 14:13:56 +00:00
.github/workflows [ci] Update action versions to silence GitHub warnings 2024-03-07 23:25:35 +00:00
contrib [crypto] Update cmsdetach to work with python-asn1 version 3.0.0 2025-03-17 11:48:06 +00:00
src [efi] Prescroll the display after a failed wrapped ExitBootServices() call 2025-03-18 14:13:56 +00:00
COPYING [legal] Update GPLv2 licence text 2015-02-26 17:59:53 +00:00
COPYING.GPLv2 [legal] Update GPLv2 licence text 2015-02-26 17:59:53 +00:00
COPYING.UBDL [legal] Add support for the Unmodified Binary Distribution Licence 2015-03-02 12:07:14 +00:00
README [doc] Re-add README file 2010-05-28 00:03:47 +01:00

README 

iPXE README File

Quick start guide:

   cd src
   make

For any more detailed instructions, see http://ipxe.org