$ gdb-multiarch -x gdb.config GNU gdb (Ubuntu 8.1.1-0ubuntu1) 8.1.1 Copyright (C) 2018 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html> This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type"show copying" and "show warranty"for details. This GDB was configured as"x86_64-linux-gnu". Type"show configuration"for configuration details. For bug reporting instructions, please see: <http://www.gnu.org/software/gdb/bugs/>. Find the GDB manual and other documentation resources online at: <http://www.gnu.org/software/gdb/documentation/>. Forhelp, type"help". Type"apropos word" to searchfor commands related to "word". No symbol table is loaded. Use the "file" command. Make breakpoint pending on future shared library load? (y or [n]) [answered N; input not from terminal] No executable file now. warning: Could not load vsyscall page because no executable was specified 0x0000007fb7f3b270 in ?? () (gdb) bt #0 0x0000007fb7f3b270 in ?? () Backtrace stopped: not enough registers or memory available to unwind further (gdb) c Continuing.