// sudo /home/gromero/systemtap/bin/stap  -g --suppress-time-limits -v -r /home/gromero/git/linux ./script.d

probe kernel.function("start_thread").return 
{ 
	if (execname() == "vrsave_") 
		printf("start_thread.return   : vrsave=%p start=%p\n", task_current()->thread->vrsave, @entry($start));
}

probe kernel.function("__switch_to").call
{
	if (execname() == "vrsave_")
		printf("__switch_to.call      : vrsave=%p, nip=%p\n", task_current()->thread->vrsave, task_current()->thread->regs->nip);
}

probe kernel.function("load_up_altivec").call
{
	if (execname() == "vrsave_")
		printf("load_up_altivec.call  :\n"); printf("trap=%p nip=%p vrsave=%p\n", task_current()->thread->regs->trap, task_current()->thread->regs->nip, task_current()->thread->vrsave); print_backtrace();
} 

probe kernel.function("load_up_altivec").return
{
	if (execname() == "vrsave_")
		printf("load_up_altivec.return:\n"); printf("trap=%p nip=%p vrsave=%p\n", task_current()->thread->regs->trap, task_current()->thread->regs->nip, task_current()->thread->vrsave); print_backtrace();
}