remove \n from panics, and use rdtsc() directly to avoid unnecessary indirection.
need to submit additional patch to make perfticks return uvlong.

Reference: /n/patches.lsub.org/patch/trapnits
Date: Mon Nov  5 15:31:18 CET 2012
Signed-off-by: quanstro@quanstro.net

--- /sys/src/nix/k10/trap.c	Thu Jul 12 10:53:55 2012
+++ /sys/src/nix/k10/trap.c	Sun Oct 28 17:40:56 2012
@@ -158,7 +158,7 @@
 	Vctl *v;
 
 	if(vno < 0 || vno >= 256)
-		panic("trapenable: vno %d\n", vno);
+		panic("trapenable: vno %d", vno);
 	v = malloc(sizeof(Vctl));
 	v->type = "trap";
 	v->tbdf = BUSUNKNOWN;
@@ -250,9 +250,9 @@
 void
 intrtime(int vno)
 {
-	ulong diff, x;		/* should be uvlong */
+	uvlong diff, x;
 
-	x = perfticks();
+	x = rdtsc();
 	diff = x - m->perf.intrts;
 	m->perf.intrts = x;
 
@@ -334,7 +334,7 @@
 
 	vno = ureg->type;
 
-	m->perf.intrts = perfticks();
+	m->perf.intrts = rdtsc();
 	user = userureg(ureg);
 	if(user && (m->nixrole == NIXTC)){
 		up->dbgreg = ureg;
@@ -412,7 +412,7 @@
 		}
 		if(vno < nelem(excname))
 			panic("%s", excname[vno]);
-		panic("unknown trap/intr: %d\n", vno);
+		panic("unknown trap/intr: %d", vno);
 	}
 	splhi();
 
@@ -468,7 +468,7 @@
 	iprint("r15\t%#16.16llux\n", ureg->r15);
 	iprint("ds  %#4.4ux   es  %#4.4ux   fs  %#4.4ux   gs  %#4.4ux\n",
 		ureg->ds, ureg->es, ureg->fs, ureg->gs);
-	iprint("ureg fs\t%#ux\n", *(unsigned int *)&ureg->ds);
+	iprint("ureg fs\t%#ux\n", *(u32int*)&ureg->ds);
 	iprint("type\t%#llux\n", ureg->type);
 	iprint("error\t%#llux\n", ureg->error);
 	iprint("pc\t%#llux\n", ureg->ip);
@@ -599,7 +599,7 @@
 {
 	coherence();
 	if(isbooting(m) && m->proc == nil){
-			tcquiesce();
+		tcquiesce();
 	}
 }
 
@@ -621,7 +621,7 @@
 	 * initialisation before the system is fully up.
 	 */
 	if(up == nil){
-		panic("fault with up == nil; pc %#llux addr %#llux\n",
+		panic("fault with up == nil; pc %#llux addr %#llux",
 			ureg->ip, addr);
 	}
 	read = !(ureg->error & 2);
@@ -642,7 +642,7 @@
 		 * the game's a bogey.
 		 */
 		if(!user && (!insyscall || up->nerrlab == 0))
-			panic("fault: %#llux\n", addr);
+			panic("fault: %#llux", addr);
 		sprint(buf, "sys: trap: fault %s addr=%#llux",
 			read? "read": "write", addr);
 		postnote(up, 1, buf, NDebug);
@@ -698,6 +698,8 @@
 {
 	ureg->ip = p->sched.pc;
 	ureg->sp = p->sched.sp+BY2SE;
+	ureg->r14 = (uvlong)p;
+	ureg->r15 = (uvlong)m;		/* well, better than nothing */
 }
 
 uintptr