gdb: If no modules have been loaded, do not try to load module symbols

This prevents load_all_modules from failing when called before any
modules have been loaded. Failures in GDB user-defined functions cause
any function which called them to also fail.

Signed-off-by: Glenn Washburn <development@efficientek.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>

diff --git a/grub-core/gdb_grub.in b/grub-core/gdb_grub.in
index edb5a8872c7c06b46e3156bc00789113d6bce45e..fc17e3d899f8a37f1f68bc420926c6b2ebbf027d 100644 (file)
--- a/grub-core/gdb_grub.in
+++ b/grub-core/gdb_grub.in
@@ -63,7 +63,9 @@ define load_all_modules
                dump_module_sections $this
                set $this = $this->next
        end
-       match_and_load_symbols
+       if (grub_dl_head != 0)
+               match_and_load_symbols
+       end
 end
 document load_all_modules
        Load debugging information for all loaded modules.