(gdb) x/10 $rsp
0x7fffffffdfe0: 0x25207825    0x78252078    0x20782520    0x25207825
0x7fffffffdff0: 0x78252078    0x20782520    0x25207825    0x00000078
0x7fffffffe000: 0x00000000    0x00000000 
