Am 13.03.2019 um 13:40 hat Paolo Bonzini geschrieben: > This backend is faster (100ns vs 150ns per switch on my laptop), but > especially it will be possible to add CET support to it. > > Unlike the ucontext backend, it does not save any register state; > all registers are clobbered in the CO_SWITCH asm, and as a result > the compiler automatically saves/restores caller-save registers in > qemu_coroutine_switch. This however means that it does not have register > mangling, which is nicely provided by glibc to the ucontext backend. > > Signed-off-by: Paolo Bonzini <pbonz...@redhat.com>
Oops, I just sent a review for v1, please look there. There's at least one bug here (misaligned stack), and a few other things I'd like to see cleaned up. Kevin
