1 files changed, 104 insertions, 0 deletions
diff --git a/grub-core/gdb/gdb.c b/grub-core/gdb/gdb.c
new file mode 100644
index 0000000..1818cb6
--- /dev/null
+++ b/grub-core/gdb/gdb.c
@@ -0,0 +1,104 @@
+/* gdb.c - gdb remote stub module */
+/*
+ *  Copyright (C) 2003  Free Software Foundation, Inc.
+ *  Copyright (C) 2006  Lubomir Kundrak
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <grub/types.h>
+#include <grub/misc.h>
+#include <grub/mm.h>
+#include <grub/err.h>
+#include <grub/dl.h>
+#include <grub/normal.h>
+#include <grub/term.h>
+#include <grub/cpu/gdb.h>
+#include <grub/gdb.h>
+#include <grub/serial.h>
+#include <grub/i18n.h>
+
+GRUB_MOD_LICENSE ("GPLv3+");
+
+static grub_err_t
+grub_cmd_gdbstub (struct grub_command *cmd __attribute__ ((unused)),
+		  int argc, char **args)
+{
+  struct grub_serial_port *port;
+  if (argc < 1)
+    return grub_error (GRUB_ERR_BAD_ARGUMENT, "port required");
+  port = grub_serial_find (args[0]);
+  if (!port)
+    return grub_errno;
+  grub_gdb_port = port;
+  /* TRANSLATORS: at this position GRUB waits for the user to do an action
+     in remote debugger, namely to tell it to establish connection.  */
+  grub_puts_ (N_("Now connect the remote debugger, please."));
+  grub_gdb_breakpoint ();
+  return 0;
+}
+
+static grub_err_t
+grub_cmd_gdbstop (struct grub_command *cmd __attribute__ ((unused)),
+		  int argc __attribute__ ((unused)),
+		  char **args __attribute__ ((unused)))
+{
+  grub_gdb_port = NULL;
+  return 0;
+}
+
+static grub_err_t
+grub_cmd_gdb_break (struct grub_command *cmd __attribute__ ((unused)),
+		    int argc __attribute__ ((unused)),
+		    char **args __attribute__ ((unused)))
+{
+  if (!grub_gdb_port)
+    return grub_error (GRUB_ERR_BAD_ARGUMENT, "No GDB stub is running");
+  grub_gdb_breakpoint ();
+  return 0;
+}
+
+static grub_command_t cmd, cmd_stop, cmd_break;
+
+GRUB_MOD_INIT (gdb)
+{
+  grub_gdb_idtinit ();
+  cmd = grub_register_command_lockdown ("gdbstub", grub_cmd_gdbstub,
+					N_("PORT"),
+					/*
+					 * TRANSLATORS: GDB stub is a small part of
+					 * GDB functionality running on local host
+					 * which allows remote debugger to
+					 * connect to it.
+					 */
+					N_("Start GDB stub on given port"));
+  cmd_break = grub_register_command_lockdown ("gdbstub_break", grub_cmd_gdb_break,
+					      /*
+					       * TRANSLATORS: this refers to triggering
+					       * a breakpoint so that the user will land
+					       * into GDB.
+					       */
+					      0, N_("Break into GDB"));
+  cmd_stop = grub_register_command_lockdown ("gdbstub_stop", grub_cmd_gdbstop,
+					     0, N_("Stop GDB stub"));
+}
+
+GRUB_MOD_FINI (gdb)
+{
+  grub_unregister_command (cmd);
+  grub_unregister_command (cmd_stop);
+  grub_gdb_idtrestore ();
+}
+