----- On Jul 15, 2020, at 9:42 AM, Florian Weimer fweimer@xxxxxxxxxx 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
