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Try loading the autoexec.ipxe script first from the directory
containing the iPXE binary (based on the relative file path provided
to us via EFI_LOADED_IMAGE_PROTOCOL), then fall back to trying the
root directory.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
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Attempt to fetch the autoexec.ipxe script via TFTP using the PXE base
code protocol installed on the loaded image's device handle, if
present.
This provides a generic alternative to the use of an embedded script
for chainloaded binaries, which is particularly useful in a UEFI
Secure Boot environment since it allows the script to be modified
without the need to sign a new binary.
As a side effect, this also provides a third method for breaking the
PXE chainloading loop (as an alternative to requiring an embedded
script or custom DHCP server configuration).
Signed-off-by: Michael Brown <mcb30@ipxe.org>
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Signed-off-by: Michael Brown <mcb30@ipxe.org>
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The "autoboot device" and "autoexec script" functionalities in
efi_autoboot.c are unrelated except in that they both need to be
invoked by efiprefix.c before device drivers are loaded.
Split out the autoexec script portions to a separate file to avoid
potential confusion.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
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