ropshell> use 61492c8e91e605776085ad3283bb53fd (download)
name         : ch37 (x86_64/ELF)
base address : 0x4000f0
total gadgets: 17

ropshell> suggest
sp lifting
    > 0x0040017e : add rsp, 0x20; ret
    > 0x0040017e : add rsp, 0x20; ret
syscall
    > 0x0040017c : syscall ; add rsp, 0x20; ret