> From: Oleg Nesterov [mailto:o...@redhat.com] > Sent: Thursday, March 05, 2015 10:22 AM > > On 03/05, Oleg Nesterov wrote: > > > > Does it trigger something else on your machine? > > Oleg. > > #include <stdio.h> > #include <signal.h> > #include <unistd.h> > #include <ucontext.h> > > void sighup(int sig, siginfo_t *info, void *ctxt) { > struct ucontext *uctxt = ctxt; > struct sigcontext *sctxt = (void*)&uctxt->uc_mcontext; > > printf("SIGHUP! %p\n", sctxt->fpstate); > sctxt->fpstate = (void *)1;
sctxt->fpstate=(void *)1 changes the fpstate pointer in the sigcontext. It will generate segfault and bad frame info in kernel. This is expected behavior, right? Is this still a valid test? Thanks. -Fenghua -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
