I wrote: > I believe you should make it signal a SIGSEGV or SIGBUS, not SIGILL, for > the following reasons:
A third reason is that the application will want to react depending on the memory address which produced the fault. (I mean the memory address of the data, not of the instruction.) This memory address is available as si_addr in the siginfo struct only for SIGSEGV and SIGBUS, see http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/signal.h.html Bruno
