GDB/MI escape characters

Hi,

Does anyone know what characters GDB escapes in the GDB/MI protocol
above and beyond what would otherwise be escaped from the CLI?

For instance if i print the variable p,
    char *p = "aaa\"aaa\naaa\raaa\\aaa";
from the cli I get,
    (gdb) p p
    $1 = 0x400584 "aaa\"aaa\naaa\raaa\\aaa"
from MI I get,
    p p
    ~"$2 = 0x400584 \"aaa\\\"aaa\\naaa\\raaa\\\\aaa\""

From the output I can see that \ and " are escaped in MI output above
and beyond what is escaped in the CLI. Are there other characters that
would be?

The function mi-out.c:mi_field_string might be a clue?

Thanks,
Bob Rossi