* Mathieu Desnoyers: > Introduce the extensible rseq ABI, where the feature size supported by > the kernel and the required alignment are communicated to user-space > through ELF auxiliary vectors. > > This allows user-space to call rseq registration with a rseq_len of > either 32 bytes for the original struct rseq size (which includes > padding), or larger. > > If rseq_len is larger than 32 bytes, then it must be large enough to > contain the feature size communicated to user-space through ELF > auxiliary vectors. I don't think this works with the glibc extension mechanism because __rseq_size does not change until the padding is exhausted. I think you'll need to add the suggested flags to the auxiliary vector, and then we can use that during registration and also communicate these flags via __rseq_flags. Size and alignment can be stored in a single auxiliary vector entry. Thanks, Florian
