The main problem is that the region that you want to map for execution *must*
be contiguous.
That is obvious.
ramfs doesn't currently guarantee that unless you truncate the
file before filling it,
Of course not. Does the XIP aware executable "loader" automatically
decide for any file to be started if it is contiguous and this can be
handled XIP or if it is fragmented and thus needs to be copied ?
but since the initramfs packer is in the kernel, that
oughtn't to be a problem.
Do you mean "unpacker" ?
I suppose the likelihood that the initramfs generator in the Kernel
creates a fragmented file is very small, as it always starts with an
empty file system.
But OTOH, there might be an issue with file data blocks. The initramfs
does not really need to use a certain block size for the files, but
maybe the XIP loader requests the files to be aligned at certain
boundaries.
-Michael
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