robin.thoni/ipxe - git rthoni.com

Michael Brown fb4ce72e64 [pxe] Warn about PXE NBPs that may be EFI executables A relatively common user mistake is to attempt to boot an EFI executable (such as grub.efi) using a BIOS version of iPXE. Unfortunately there are no signature checks that we can use to unambiguously identify a PXE NBP, since a PXE NBP is just raw machine code. We therefore have to accept anything sufficiently small to fit into base memory as a valid PXE NBP. We can detect that a file might be an EFI executable by checking for the initial "MZ" signature bytes. This does not necessarily preclude the file from also being a PXE NBP (since it would be possible to create a hybrid binary which acts as both an EFI executable and a PXE NBP, similar to the way in which wimboot and the Linux kernel are hybrid binaries which act as both an EFI executable and a bzImage). If the initial "MZ" signature bytes are present, then attempt to warn the user by setting the image type to "PXE-NBP (may be EFI?)". We can't (sensibly) prevent the user from accidentally running an EFI executable as a PXE NBP, but we can at least make it easier for the user to identify their mistake. Inspired-by: Robin Smidsrød <robin@smidsrod.no> Inspired-by: Wissam Shoukair <wissams@mellanox.com> Signed-off-by: Michael Brown <mcb30@ipxe.org>		9 years ago
contrib	[errdb] Strip platform error code for non-platform-generated errors	11 years ago
src	[pxe] Warn about PXE NBPs that may be EFI executables	9 years ago
COPYING	[legal] Update GPLv2 licence text	9 years ago
COPYING.GPLv2	[legal] Update GPLv2 licence text	9 years ago
COPYING.UBDL	[legal] Add support for the Unmodified Binary Distribution Licence	9 years ago
README	[doc] Re-add README file	14 years ago

iPXE README File

Quick start guide:

   cd src
   make

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