user manual

set endian big
Instruct GDB to assume the target is big-endian.
set endian little
Instruct GDB to assume the target is little-endian.
set endian auto
Instruct GDB to use the byte order associated with the
executable.
show endian
Display GDB's current idea of the target byte order.
Note that these commands merely adjust interpretation of symbolic data on the host,
and that they have absolutely no effect on the target system.
136 Specifying a Debugging Target