diff --git a/kern/monitor.c b/kern/monitor.c
index ee25809..c97da78 100644
--- a/kern/monitor.c
+++ b/kern/monitor.c
@@ -25,6 +25,7 @@ struct Command {
 static struct Command commands[] = {
 	{ "help", "Display this list of commands", mon_help },
 	{ "kerninfo", "Display information about the kernel", mon_kerninfo },
+	{ "backtrace", "Display current backtrace", mon_backtrace }
 };
 
 /***** Implementations of basic kernel monitor commands *****/
@@ -61,6 +62,25 @@ mon_backtrace(int argc, char **argv, struct Trapframe *tf)
 	// LAB 1: Your code here.
     // HINT 1: use read_ebp().
     // HINT 2: print the current ebp on the first line (not current_ebp[0])
+	uint32_t* ebp;
+	uint32_t eip;
+	struct Eipdebuginfo info;
+
+	ebp = (uint32_t*) read_ebp();
+	cprintf("Stack backtrace:\n");
+	while(ebp) {
+		eip = ebp[1];
+		cprintf("  ebp %08x  eip %08x  args %08x %08x %08x %08x %08x\n",
+			ebp, eip, ebp[2], ebp[3], ebp[4], ebp[5], ebp[6]);
+		ebp = (uint32_t*) ebp[0];
+		
+		debuginfo_eip(eip, &info);
+		cprintf("           %s:%d: %.*s+%d\n",
+			info.eip_file, info.eip_line,
+			info.eip_fn_namelen, info.eip_fn_name,
+			eip - info.eip_fn_addr);
+	};
+	
 	return 0;
 }