[src/trunk]: src/sys/kern Wait for the next character forever as kgdb wants.

[christos <christos%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/21cd69951867
branches:  trunk
changeset: 809230:21cd69951867
user:      christos <christos%NetBSD.org@localhost>
date:      Fri Jun 26 14:26:38 2015 +0000

description:
Wait for the next character forever as kgdb wants.

diffstat:

 sys/kern/kgdb_stub.c |  17 +++++++++++++----
 1 files changed, 13 insertions(+), 4 deletions(-)

diffs (38 lines):

diff -r 5d5909289d9f -r 21cd69951867 sys/kern/kgdb_stub.c
--- a/sys/kern/kgdb_stub.c      Fri Jun 26 14:20:11 2015 +0000
+++ b/sys/kern/kgdb_stub.c      Fri Jun 26 14:26:38 2015 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: kgdb_stub.c,v 1.28 2014/09/21 17:17:15 christos Exp $  */
+/*     $NetBSD: kgdb_stub.c,v 1.29 2015/06/26 14:26:38 christos Exp $  */
 
 /*
  * Copyright (c) 1990, 1993
@@ -45,7 +45,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: kgdb_stub.c,v 1.28 2014/09/21 17:17:15 christos Exp $");
+__KERNEL_RCSID(0, "$NetBSD: kgdb_stub.c,v 1.29 2015/06/26 14:26:38 christos Exp $");
 
 #include "opt_ddb.h"
 #include "opt_kgdb.h"
@@ -85,8 +85,17 @@
 static u_char buffer[KGDB_BUFLEN];
 static kgdb_reg_t gdb_regs[KGDB_NUMREGS];
 
-#define GETC() ((*kgdb_getc)(kgdb_ioarg))
-#define PUTC(c)        ((*kgdb_putc)(kgdb_ioarg, c))
+#define GETC() kgdb_waitc(kgdb_ioarg)
+#define PUTC(c)        (*kgdb_putc)(kgdb_ioarg, c)
+
+static int
+kgdb_waitc(void *arg)
+{
+       int c;
+       while ((c = (*kgdb_getc)(arg)) == -1)
+               continue;
+       return c;
+}
 
 /*
  * db_trap_callback can be hooked by MD port code to handle special