Just to complete it:
(gdb) p (char[10]) *($ebx)
$87 = "asdfasdfe\n"
You must give a length, but may change the representation of that string:
(gdb) p/x (char[10]) *($ebx)
$90 = {0x61,
0x73,
0x64,
0x66,
0x61,
0x73,
0x64,
0x66,
0x65,
0xa}
This may be useful if you want to debug by their values