On Wed, Feb 22, 2012 at 4:29 PM, H. Peter Anvin <hpa@xxxxxxxxx> wrote: > Can we really introduce force-kill semantics for a POSIX-defined signal? > Other user space programs might use it for other purposes. The semantics are based on how the signal was generated, not what signal number it was. The only thing that depends on the signal number is SYNCHRONOUS_MASK, which just determines in which order pending signals are dequeued (POSIX says it may be any order). We only have that so your state doesn't get unhelpfully warped to another signal handler entry point (including fiddling the stack) before you dump core. No use of SIGSYS is specified by POSIX at all, of course, since "system call" is an implementation concept below the level POSIX specifies. -- To unsubscribe from this list: send the line "unsubscribe linux-arch" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
