Messages in this thread | | | Date | Wed, 15 Jul 2020 10:54:06 -0400 (EDT) | From | Mathieu Desnoyers <> | Subject | Re: [RFC PATCH 2/4] rseq: Allow extending struct rseq |
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----- On Jul 15, 2020, at 9:42 AM, Florian Weimer fweimer@redhat.com wrote: > * Mathieu Desnoyers: > [...] >> How would this allow early-rseq-adopter libraries to interact with >> glibc ? > > Under all extension proposals I've seen so far, early adopters are > essentially incompatible with glibc rseq registration. I don't think > you can have it both ways.
The basic question I'm not sure about is whether we are allowed to increase the size and alignement of __rseq_abi from e.g. glibc 2.32 to glibc 2.33. If not, then we just need to find another way to extend struct rseq, e.g. by adding a pointer to another extended structure in the padding space we have at the end of struct rseq.
Thanks,
Mathieu
-- Mathieu Desnoyers EfficiOS Inc. http://www.efficios.com
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