Support listening on port 0.

[openocd.git] / src / server / gdb_server.c

diff --git a/src/server/gdb_server.c b/src/server/gdb_server.c
index fc0868b0a3d56d7ae1c27db014fb68c15d904186..b2d13d72f5ac4afdbcd7331a0292590e11971bc1 100644 (file)
--- a/src/server/gdb_server.c
+++ b/src/server/gdb_server.c
@@ -3090,7 +3090,13 @@ static int gdb_target_add_one(struct target *target)
                if (!*end) {
                        if (parse_long(gdb_port_next, &portnumber) == ERROR_OK) {
                                free(gdb_port_next);
-                               gdb_port_next = alloc_printf("%d", portnumber+1);
+                               if (portnumber) {
+                                       gdb_port_next = alloc_printf("%d", portnumber+1);
+                               } else {
+                                       /* Don't increment if gdb_port is 0, since we're just
+                                        * trying to allocate an unused port. */
+                                       gdb_port_next = strdup("0");
+                               }
                        }
                }
        }