Comment 6 for bug 1805913

After studying linux-user/syscall.c a bit, would it be possible to work around this issue by doing something like the following:

Add a new #define EMULATE_GETDENTS64_WITH_GETDENTS, and enable this iff we have getdents, and the target is 32, while the host is 64 bits. Something similar, but complementary is done with EMULATE_GETDENTS_WITH_GETDENTS64.

In that case, when userspace calls getdents64, we implement a "conversion" (similar to getdents #if logic), which calls the host's getdents and converts the data structures back to their 64-bit variants before handing back to user-space.

I'm likely over-simplifying a problem that I don't fully understand, but would happily work on a patch if someone higher up the food chain could fill in the gaps.