** please load a program first.
** program './deep' loaded. entry point 0x401131.
      401131: f3 0f 1e fa                     	endbr64   
      401135: 55                              	push      rbp
      401136: 48 89 e5                        	mov       rbp, rsp
      401139: 48 83 ec 10                     	sub       rsp, 0x10
      40113d: b8 00 00 00 00                  	mov       eax, 0
      401135: 55                              	push      rbp
      401136: 48 89 e5                        	mov       rbp, rsp
      401139: 48 83 ec 10                     	sub       rsp, 0x10
      40113d: b8 00 00 00 00                  	mov       eax, 0
      401142: e8 3f ff ff ff                  	call      0x401086
      401136: 48 89 e5                        	mov       rbp, rsp
      401139: 48 83 ec 10                     	sub       rsp, 0x10
      40113d: b8 00 00 00 00                  	mov       eax, 0
      401142: e8 3f ff ff ff                  	call      0x401086
      401147: 89 45 fc                        	mov       dword ptr [rbp - 4], eax
this is callee
hello world
hello unix
** the target program terminated.