ropshell> use e2504feffe7b1e96a2add7f1964af408 (download)
name         : ch37 (x86_64/ELF)
base address : 0x4000b0
total gadgets: 17

ropshell> suggest
sp lifting
    > 0x0040013e : add rsp, 0x20; ret
    > 0x0040013e : add rsp, 0x20; ret
syscall
    > 0x0040013c : syscall ; add rsp, 0x20; ret