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-rw-r--r--sys/ddb/db_command.c10
1 files changed, 9 insertions, 1 deletions
diff --git a/sys/ddb/db_command.c b/sys/ddb/db_command.c
index cb41d85..f86ad2f 100644
--- a/sys/ddb/db_command.c
+++ b/sys/ddb/db_command.c
@@ -23,7 +23,7 @@
* any improvements or extensions that they make and grant Carnegie the
* rights to redistribute these changes.
*
- * $Id: db_command.c,v 1.28 1998/07/08 10:53:45 bde Exp $
+ * $Id: db_command.c,v 1.29 1999/01/14 06:22:01 jdp Exp $
*/
/*
@@ -535,6 +535,8 @@ db_fncall(dummy1, dummy2, dummy3, dummy4)
/* Enter GDB remote protocol debugger on the next trap. */
+dev_t gdbdev;
+
static void
db_gdb (dummy1, dummy2, dummy3, dummy4)
db_expr_t dummy1;
@@ -542,6 +544,12 @@ db_gdb (dummy1, dummy2, dummy3, dummy4)
db_expr_t dummy3;
char * dummy4;
{
+
+ if (gdbdev == -1) {
+ db_printf("No gdb port enabled. Set flag 0x80 on desired port\n");
+ db_printf("in your configuration file (currently sio only).\n");
+ return;
+ }
boothowto ^= RB_GDB;
db_printf("Next trap will enter %s\n",
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