| Hi, I propose the following changes: MiNTLib (sigaction) - add member sa_action to sa_sigaction - add flag SA_SIGACTION This afaik doesn't really affect kernel<>library interaction at all, but rather just allows an alternative set of parameters for the signal hander. Kernel - add members to struct sigcontext: ulong sc_regs[15]; ulong sc_fregs[8*3]; ulong sc_fctrl[3]; ushort sc_mask; - save/restore register context + sc_mask (which is actually sigact->sa_mask) in sig_mach.c Signal handler Normally, this is void handler(int sig). If SA_SIGACTION is enabled, it should be something like void handler(int sig, int info, sigcontect* sc). Why? It's a nice feature in other unixoids, and allows nifty things like threads and other stuff to be implemented in user mode applications. It also allows application-specific debug output with register contents etc. when things go bump. I know I asked for input about this before, but I just try one more time :) I've verified that context switching etc is possible this way, the only thing I'm worried about is FPU context saving/restoring, because I don't know how much is needed. I haven't verified that sa_mask can be saved/restored this way, but I guess it should be possible. Input - any - is welcome. -- PeP |