Let’s try to construct C code from the corresponding x86 assembly code. In this exercise, we will look into the x86 assembly code and try to construct the corresponding C code.

Let’s look into the following piece of assembly code:

0000000000400546 <main>:
  400546:	push   rbp
  400547:	mov    rbp,rsp
  40054a:	sub    rsp,0x20
  40054e:	mov    rax,QWORD PTR fs:0x28
  400555:	00 00 
  400557:	mov    QWORD PTR [rbp-0x8],rax
  40055b:	xor    eax,eax
  40055d:	mov    DWORD PTR [rbp-0x10],0x6c6c6548
  400564:	mov    WORD PTR [rbp-0xc],0x6f
  40056a:	mov    DWORD PTR [rbp-0x18],0x0
  400571:	jmp    400577 <main+0x31>
  400573:	add    DWORD PTR [rbp-0x18],0x1
  400577:	mov    eax,DWORD PTR [rbp-0x18]
  40057a:	cdqe   
  40057c:	movzx  eax,BYTE PTR [rbp+rax*1-0x10]
  400581:	test   al,al
  400583:	jne    400573 <main+0x2d>
  400585:	mov    eax,DWORD PTR [rbp-0x18]
  400588:	mov    DWORD PTR [rbp-0x14],eax
  40058b:	mov    eax,0x0
  400590:	mov    rdx,QWORD PTR [rbp-0x8]
  400594:	xor    rdx,QWORD PTR fs:0x28
  40059b:	00 00 
  40059d:	je     4005a4 <main+0x5e>
  40059f:	call   400420 <__stack_chk_fail@plt>
  4005a4:	leave  
  4005a5:	ret    
  4005a6:	nop    WORD PTR cs:[rax+rax*1+0x0]
  4005ad:	00 00 00