diff -r bdfc3faa253a src/cmd/prof/main.c
--- a/src/cmd/prof/main.c	Fri Dec 04 21:58:32 2009 -0800
+++ b/src/cmd/prof/main.c	Sat Dec 05 10:36:13 2009 -0800
@@ -8,7 +8,8 @@
 #include <bio.h>
 #include <ctype.h>
 
-#include <ureg_amd64.h>
+//#include <ureg_amd64.h>
+#include <ureg_x86.h>
 #include <mach.h>
 
 char* file = "6.out";
@@ -73,6 +74,7 @@ regprint(void)
 	fprint(2, "si\t0x%llux\n", ureg.si);
 	fprint(2, "di\t0x%llux\n", ureg.di);
 	fprint(2, "bp\t0x%llux\n", ureg.bp);
+	/*
 	fprint(2, "r8\t0x%llux\n", ureg.r8);
 	fprint(2, "r9\t0x%llux\n", ureg.r9);
 	fprint(2, "r10\t0x%llux\n", ureg.r10);
@@ -81,13 +83,17 @@ regprint(void)
 	fprint(2, "r13\t0x%llux\n", ureg.r13);
 	fprint(2, "r14\t0x%llux\n", ureg.r14);
 	fprint(2, "r15\t0x%llux\n", ureg.r15);
+	*/
 	fprint(2, "ds\t0x%llux\n", ureg.ds);
 	fprint(2, "es\t0x%llux\n", ureg.es);
 	fprint(2, "fs\t0x%llux\n", ureg.fs);
 	fprint(2, "gs\t0x%llux\n", ureg.gs);
+	/*
 	fprint(2, "type\t0x%llux\n", ureg.type);
 	fprint(2, "error\t0x%llux\n", ureg.error);
 	fprint(2, "pc\t0x%llux\n", ureg.ip);
+	*/
+	fprint(2, "pc\t0x%llux\n", ureg.pc);
 	fprint(2, "cs\t0x%llux\n", ureg.cs);
 	fprint(2, "flags\t0x%llux\n", ureg.flags);
 	fprint(2, "sp\t0x%llux\n", ureg.sp);
@@ -163,7 +169,7 @@ sample(Map *map)
 		}
 	} else {
 		// we need only two registers
-		if(get8(map, offsetof(struct Ureg, ip), (uvlong*)&ureg.ip) < 0)
+		if(get8(map, offsetof(struct Ureg, pc), (uvlong*)&ureg.pc) < 0)
 			goto bad;
 		if(get8(map, offsetof(struct Ureg, sp), (uvlong*)&ureg.sp) < 0)
 			goto bad;
@@ -277,7 +283,7 @@ samples(void)
 				ctlproc(pid, "start");
 				return;
 			}
-			printpc(map[i], ureg.ip, ureg.sp);
+			printpc(map[i], ureg.pc, ureg.sp);
 			ctlproc(pid, "start");
 		}
 		nanosleep(&req, NULL);