> UML, obviously. Below is a smaller test. orig_eax is wrong, so you
> can't read the system call number from the process.
Oops! I overlooked the need to preserve the orig_eax value, though its
necessity is obvious. This makes me wonder about those previous
reports that UML was working OK.
I refined the test case a little and that's in
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=241408
I've fixed this in the latest utrace patch set. I also wired up
sysemu on x86_64. This means 32-bit processes calling ptrace now
support it for full compatibility with native i386, which the vanilla
kernel does not. It also means it works for 64-bit ptrace calls,
whether operating on a 64-bit or a 32-bit target process.
Thanks,
Roland
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