This is the patch to remove sprint from ppc. I had to modify the fpexcname() API in trap.c, like in mtx.

Reference: /n/sources/patch/saved/remove-sprint-ppc
Date: Fri Feb 25 22:46:30 CET 2011
Signed-off-by: 20h@r-36.net

--- /sys/src/9/ppc/trap.c	Fri Feb 25 22:39:25 2011
+++ /sys/src/9/ppc/trap.c	Fri Feb 25 22:39:19 2011
@@ -109,7 +109,7 @@
 	"overflow",
 	"invalid operation",
 };
-char	*fpexcname(Ureg*, ulong, char*);
+char	*fpexcname(Ureg*, ulong, char*, int);
 #define FPEXPMASK	0xfff80300		/* Floating exception bits in fpscr */
 
 
@@ -256,7 +256,7 @@
 		default:
 			if(user){
 				spllo();
-				sprint(buf, "sys: floating point in note handler:");
+				snprint(buf, sizeof(buf), "sys: floating point in note handler:");
 				postnote(up, 1, buf, NDebug);
 				break;
 			}
@@ -275,7 +275,7 @@
 			s = "undefined program exception";
 		if(user){
 			spllo();
-			sprint(buf, "sys: trap: %s", s);
+			snprint(buf, sizeof(buf), "sys: trap: %s", s);
 			postnote(up, 1, buf, NDebug);
 			break;
 		}
@@ -285,7 +285,7 @@
 	default:
 		if(ecode < nelem(excname) && user){
 			spllo();
-			sprint(buf, "sys: trap: %s", excname[ecode]);
+			snprint(buf, sizeof(buf), "sys: trap: %s", excname[ecode]);
 			postnote(up, 1, buf, NDebug);
 			break;
 		}
@@ -330,7 +330,7 @@
 			dumpregs(ureg);
 			panic("fault: 0x%lux", addr);
 		}
-		sprint(buf, "sys: trap: fault %s addr=0x%lux", read? "read" : "write", addr);
+		snprint(buf, sizeof(buf), "sys: trap: fault %s addr=0x%lux", read? "read" : "write", addr);
 		postnote(up, 1, buf, NDebug);
 	}
 	up->insyscall = insyscall;
@@ -390,7 +390,7 @@
 }
 
 char*
-fpexcname(Ureg *ur, ulong fpscr, char *buf)
+fpexcname(Ureg *ur, ulong fpscr, char *buf, int blen)
 {
 	int i;
 	char *s;
@@ -405,7 +405,7 @@
 			s = fpcause[i];
 	if(s == 0)
 		return "no floating point exception";
-	sprint(buf, "%s fppc=0x%lux", s, fppc);
+	snprint(buf, blen, "%s fppc=0x%lux", s, fppc);
 	return buf;
 }
 
@@ -722,7 +722,7 @@
 		l = strlen(n->msg);
 		if(l > ERRMAX-15)	/* " pc=0x12345678\0" */
 			l = ERRMAX-15;
-		sprint(n->msg+l, " pc=0x%.8lux", ur->pc);
+		snprint(n->msg+l, sizeof(n->msg)-l, " pc=0x%.8lux", ur->pc);
 	}
 
 	if(n->flag!=NUser && (up->notified || up->notify==0)){
--- /sys/src/9/ppc/main.c	Fri Feb 25 22:39:32 2011
+++ /sys/src/9/ppc/main.c	Fri Feb 25 22:39:28 2011
@@ -437,7 +437,7 @@
 	int i;
 	char cc[KNAMELEN], *p;
 
-	sprint(cc, "%s%d", class, ctlrno);
+	snprint(cc, sizeof(cc), "%s%d", class, ctlrno);
 
 	p = getconf(cc);
 	if(p == 0)
--- /sys/src/9/ppc/devtls.c	Fri Feb 25 22:39:42 2011
+++ /sys/src/9/ppc/devtls.c	Fri Feb 25 22:39:36 2011
@@ -320,7 +320,7 @@
 			nm = eve;
 		if((name = trnames[s]) == nil) {
 			name = trnames[s] = smalloc(16);
-			sprint(name, "%d", s);
+			snprint(name, 16, "%d", s);
 		}
 		devdir(c, q, name, 0, nm, 0555, dp);
 		unlock(&tdlock);
--- /sys/src/9/ppc/devflash.c	Fri Feb 25 22:39:52 2011
+++ /sys/src/9/ppc/devflash.c	Fri Feb 25 22:39:48 2011
@@ -361,7 +361,7 @@
 		flash->bootprotect = 1;
 		flash->offset = offset;
 		fname = malloc(8);
-		sprint(fname, "flash%d", ctlrno);
+		snprint(fname, 8, "flash%d", ctlrno);
 		addpart(nil, fname, offset, offset + flash->size);
 		offset += flash->size;
 	}
@@ -760,15 +760,15 @@
 	char err[64];
 
 	if(status & (ISEs_lockerr)){
-		sprint(err, "flash%d: block locked %lux", bank, status);
+		snprint(err, sizeof(err), "flash%d: block locked %lux", bank, status);
 		error(err);
 	}
 	if(status & (ISEs_powererr)){
-		sprint(err, "flash%d: low prog voltage %lux", bank, status);
+		snprint(err, sizeof(err), "flash%d: low prog voltage %lux", bank, status);
 		error(err);
 	}
 	if(status & (ISEs_progerr|ISEs_eraseerr)){
-		sprint(err, "flash%d: i/o error %lux", bank, status);
+		snprint(err, sizeof(err), "flash%d: i/o error %lux", bank, status);
 		error(err);
 	}
 }
--- /sys/src/9/ppc/devether.c	Fri Feb 25 22:39:59 2011
+++ /sys/src/9/ppc/devether.c	Fri Feb 25 22:39:56 2011
@@ -391,16 +391,16 @@
 			 */
 			if(ether->irq >= 0)
 				intrenable(ether->irq, ether->interrupt, ether, name);
-			i = sprint(buf, "#l%d: %s: %dMbps port 0x%luX irq %d",
+			i = snprint(buf, sizeof(buf), "#l%d: %s: %dMbps port 0x%luX irq %d",
 				ctlrno, ether->type, ether->mbps, ether->port, ether->irq);
 			if(ether->mem)
-				i += sprint(buf+i, " addr 0x%luX", PADDR(ether->mem));
+				i += snprint(buf+i, sizeof(buf)-i, " addr 0x%luX", PADDR(ether->mem));
 			if(ether->size)
-				i += sprint(buf+i, " size 0x%luX", ether->size);
-			i += sprint(buf+i, ": %2.2ux%2.2ux%2.2ux%2.2ux%2.2ux%2.2ux",
+				i += snprint(buf+i, sizeof(buf)-i, " size 0x%luX", ether->size);
+			i += snprint(buf+i, sizeof(buf)-i, ": %2.2ux%2.2ux%2.2ux%2.2ux%2.2ux%2.2ux",
 				ether->ea[0], ether->ea[1], ether->ea[2],
 				ether->ea[3], ether->ea[4], ether->ea[5]);
-			sprint(buf+i, "\n");
+			snprint(buf+i, sizeof(buf)-i, "\n");
 			print(buf);
 
 			if(ether->mbps >= 100){