1 files changed, 12 insertions, 0 deletions
diff --git a/src/cmd/5g/list.c b/src/cmd/5g/list.c
index b46188a73..631015869 100644
--- a/src/cmd/5g/list.c
+++ b/src/cmd/5g/list.c
@@ -39,6 +39,7 @@ listinit(void)
 	fmtinstall('P', Pconv);		// Prog*
 	fmtinstall('D', Dconv);		// Addr*
 	fmtinstall('Y', Yconv);		// sconst
+	fmtinstall('R', Rconv);		// register
 }
 
 int
@@ -198,3 +199,14 @@ Yconv(Fmt *fp)
 	*p = 0;
 	return fmtstrcpy(fp, str);
 }
+
+int
+Rconv(Fmt *fp)
+{
+	int r;
+	char str[30];
+
+	r = va_arg(fp->args, int);
+	snprint(str, sizeof(str), "R%d", r);
+	return fmtstrcpy(fp, str);
+}