tidbits

Reference: /n/atom/patch/applied/nixtrapnits
Date: Sat Mar 22 04:58:26 CET 2014
Signed-off-by: quanstro@quanstro.net

--- /sys/src/nix/k10/trap.c	Sat Mar 22 04:58:20 2014
+++ /sys/src/nix/k10/trap.c	Sat Mar 22 04:58:20 2014
@@ -29,7 +29,6 @@
 {
 	int vno;
 	Vctl *v, *old;
-	extern int ioapicintrenable(Vctl*);
 
 	if(f == nil){
 		print("intrenable: nil handler for %d, tbdf %#ux for %s\n",
@@ -80,8 +79,6 @@
 {
 	Vctl *v;
 
-	if(vno < 0 || vno >= 256)
-		panic("trapenable: vno %d", vno);
 	v = malloc(sizeof(Vctl));
 	v->type = "trap";
 	v->tbdf = BUSUNKNOWN;
@@ -503,7 +500,7 @@
 		panic("kernel bpt");
 	/* restore pc to instruction that caused the trap */
 	ureg->ip--;
-	sprint(buf, "sys: breakpoint");
+	snprint(buf, sizeof buf, "sys: breakpoint");
 	postnote(up, 1, buf, NDebug);
 }
 
@@ -571,7 +568,7 @@
 			panic("fault: %#p pc %#p", addr, ureg->ip);
 		print("%ud: %s: %s: fault addr=%#p kpc=%#p\n",
 			up->pid, up->text, up->user, addr, ureg->ip);
-		sprint(buf, "sys: trap: fault %s addr=%#p",
+		snprint(buf, sizeof buf, "sys: trap: fault %s addr=%#p",
 			read? "read": "write", addr);
 		postnote(up, 1, buf, NDebug);
 		if(insyscall)