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Mark all files used in a standard build of bin-x86_64-efi/snponly.efi
as permitted for UEFI Secure Boot. These files represent the core
functionality of iPXE that is guaranteed to have been included in
every binary that was previously subject to a security review and
signed by Microsoft. It is therefore legitimate to assume that at
least these files have already been reviewed to the required standard
multiple times.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
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Since all data transfer buffer contents are now accessible via direct
pointer dereferences, remove the unnecessary abstractions for read and
write operations and create two new data transfer buffer types: a
fixed-size buffer, and a void buffer that records its size but can
never receive non-zero lengths of data. These replace the custom data
buffer types currently implemented for EFI PXE TFTP downloads and for
block device translations.
A new operation xferbuf_detach() is required to take ownership of the
data accumulated in the data transfer buffer, since we no longer rely
on the existence of an independently owned external data pointer for
data transfer buffers allocated via umalloc().
Signed-off-by: Michael Brown <mcb30@ipxe.org>
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Simplify the block device code by assuming that all read/write buffers
are directly accessible via pointer dereferences.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
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Add a generic mechanism for providing block devices on top of a data
transfer interface (such as HTTP).
Signed-off-by: Michael Brown <mcb30@ipxe.org>
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