Sergey Bugaev wrote: > state->basic is the Mach i386_thread_state structure; the > signal handling machinery first initializes it using thread_get_state > ()) to describe the state that the thread had at the time it was > interrupted. It then initializes the sigcontext based on this state > (memcpy'ing from state->basic), and then mutates state->basic to point > %rip to the trampoline, %rsp to sigsp, etc., and then uses this same > state->basic structure in a thread_set_state () call to apply the new > state, to set the thread off to run the handler. But these > modifications never reach the struct sigcontext, which still > represents the state of the thread when it was interrupted.
Thanks for explaining, again. I've corrected the comments in libsigsegv and gnulib accordingly. Bruno
