CloudABI

Posted Feb 12, 2016 19:38 UTC (Fri) by jhoblitt (subscriber, #77733)
Parent article: CloudABI

How are different system call numbers and semantics handled across platforms? Is there some sort of shim layer or is this just a hypothetical feature?

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CloudABI

Posted Feb 13, 2016 3:00 UTC (Sat) by neilbrown (subscriber, #359) [Link]

I believe it is a real implemented feature.

On an x86_64 Linux kernel you can run x86_32 binaries which have a completely different set of system numbers and somewhat different semantics. I presume a similar arrangement can cause syscalls to be routed to a "CloudABI" set of systemcalls.
For the most part the sematics that Capsicum allows will be fairly uniform thanks to Posix. I haven't looked into the specifics of the code to see how many "Quirks" need handling.