On 5/10/19 10:37 AM, Jethro Beekman wrote:
It does assume a specific format, namely, that the memory layout
(including page types/permissions) of the enclave can be represented in
a "flat file" on disk, or at least that the enclave memory contents
consist of 4096-byte chunks in that file.
I _think_ Cedric's point is that, to the kernel,
/lib/x86_64-linux-gnu/libc.so.6 is a "flat file" because the kernel
doesn't have any part in parsing the executable format of a shared library.
I actually don't know how it works, though. Do we just just trust that
the userspace parsing of the .so format is correct? Do we just assume
that any part of a file passing IMA checks can be PROT_EXEC?
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