我写了一个简单的破解程序。您可以在此程序中看到名为check的函数的汇编代码：
(gdb) disassemble check
Dump of assembler code for function check:
0x08048484 <+0>: push ebp
0x08048485 <+1>: mov ebp,esp
0x08048487 <+3>: sub esp,0x28
0x0804848a <+6>: mov DWORD PTR [ebp-0x8],0x0
0x08048491 <+13>: mov DWORD PTR [ebp-0xc],0x0
0x08048498 <+20>: mov eax,DWORD PTR [ebp+0x8]
0x0804849b <+23>: mov DWORD PTR [esp],eax
0x0804849e <+26>: call 0x8048384 <strlen@plt> <<<<<< Here!
0x080484a3 <+31>: cmp DWORD PTR [ebp-0xc],eax
0x080484a6 <+34>: jae 0x80484fb <check+119>
0x080484a8 <+36>: mov eax,DWORD PTR [ebp-0xc]
0x080484ab <+39>: add eax,DWORD PTR [ebp+0x8]
0x080484ae <+42>: movzx eax,BYTE PTR [eax]
0x080484b1 <+45>: mov BYTE PTR [ebp-0xd],al
0x080484b4 <+48>: lea eax,[ebp-0x4]
0x080484b7 <+51>: mov DWORD PTR [esp+0x8],eax
0x080484bb <+55>: mov DWORD PTR [esp+0x4],0x8048638
0x080484c3 <+63>: lea eax,[ebp-0xd]
0x080484c6 <+66>: mov DWORD PTR [esp],eax
0x080484c9 <+69>: call 0x80483a4 <sscanf@plt>
0x080484ce <+74>: mov edx,DWORD PTR [ebp-0x4]
0x080484d1 <+77>: lea eax,[ebp-0x8]
0x080484d4 <+80>: add DWORD PTR [eax],edx
0x080484d6 <+82>: cmp DWORD PTR [ebp-0x8],0xf
0x080484da <+86>: jne 0x80484f4 <check+112>
0x080484dc <+88>: mov DWORD PTR [esp],0x804863b
0x080484e3 <+95>: call 0x8048394 <printf@plt>
0x080484e8 <+100>: mov DWORD PTR [esp],0x0
0x080484ef <+107>: call 0x80483b4 <exit@plt>
0x080484f4 <+112>: lea eax,[ebp-0xc]
0x080484f7 <+115>: inc DWORD PTR [eax]
0x080484f9 <+117>: jmp 0x8048498 <check+20>
0x080484fb <+119>: mov DWORD PTR [esp],0x8048649
0x08048502 <+126>: call 0x8048394 <printf@plt>
0x08048507 <+131>: leave
0x08048508 <+132>: ret
如上所述，在check函数内部，有一个函数调用strlen。问题是如何查看传递给strlen()的字符串？