go写的题，go语言个人认为很讨厌，所以函数全静态编译删除符号。说是为了不同平台版本上兼容，实际上如果有bug的话会很难处理。

起点都不知道在哪。从hex里搜flag啥的

00000000004CEE90: .rodata:00000000004CEE90 (ea at start-of-line=4CEE90)	 66 6C 61 67 20 79 6F 75  20 69 6E 70 75 74 20 69  flag you input i	

然后找调用它的位置（这不是串的起点，要找到起点）

.rodata:00000000004CEE7D unk_4CEE7D Congratulation the flag you input is correct

再往上找调用处

.rodata:00000000004E1140 off_4E1140      dq offset unk_4CEE7D
.text:0000000000495393 loc_495393:                             ; CODE XREF: sub_495150+1CC↑j
.text:0000000000495393                 mov     [rsp+100h+var_100], rdx
.text:0000000000495397                 mov     [rsp+100h+var_F8], rcx
.text:000000000049539C                 mov     [rsp+100h+var_F0], rbx
.text:00000000004953A1                 call    sub_4023F0
.text:00000000004953A6                 cmp     byte ptr [rsp+100h+var_E8], 0
.text:00000000004953AB                 jz      loc_49531E
.text:00000000004953B1                 xorps   xmm0, xmm0
.text:00000000004953B4                 movups  [rsp+100h+var_48], xmm0
.text:00000000004953BC                 lea     rax, unk_4A6D00
.text:00000000004953C3                 mov     qword ptr [rsp+100h+var_48], rax
.text:00000000004953CB                 lea     rax, off_4E1140        <-----引用在这里
.text:00000000004953D2                 mov     qword ptr [rsp+100h+var_48+8], rax
.text:00000000004953DA                 nop
.text:00000000004953DB                 mov     rax, cs:qword_572B18
.text:00000000004953E2                 lea     rcx, off_4E28A0
.text:00000000004953E9                 mov     [rsp+100h+var_100], rcx
.text:00000000004953ED                 mov     [rsp+100h+var_F8], rax
.text:00000000004953F2                 lea     rax, [rsp+100h+var_48]
.text:00000000004953FA                 mov     [rsp+100h+var_F0], rax
.text:00000000004953FF                 mov     [rsp+100h+var_E8], 1
.text:0000000000495408                 mov     [rsp+100h+var_E0], 1
.text:0000000000495411                 call    sub_4886B0
.text:0000000000495416                 jmp     loc_495383

这是输出正确信息的部分，再向前查判断对错的部分

.text:000000000049530D loc_49530D:                             ; CODE XREF: sub_495150+36A↓j
.text:000000000049530D                 mov     rax, [rsp+100h+var_60]
.text:0000000000495315                 mov     rcx, [rax]
.text:0000000000495318                 cmp     [rax+8], rbx <------在这里判断对错，然后跳转
.text:000000000049531C                 jz      short loc_495393
.text:000000000049531E
.text:000000000049531E loc_49531E:                             ; CODE XREF: sub_495150+25B↓j
.text:000000000049531E                 xorps   xmm0, xmm0
.text:0000000000495321                 movups  [rsp+100h+var_58], xmm0
.text:0000000000495329                 lea     rax, unk_4A6D00
.text:0000000000495330                 mov     qword ptr [rsp+100h+var_58], rax
.text:0000000000495338                 lea     rax, off_4E1150
.text:000000000049533F                 mov     qword ptr [rsp+100h+var_58+8], rax
.text:0000000000495347                 nop
.text:0000000000495348                 mov     rax, cs:qword_572B18
.text:000000000049534F                 lea     rcx, off_4E28A0
.text:0000000000495356                 mov     [rsp+100h+var_100], rcx
.text:000000000049535A                 mov     [rsp+100h+var_F8], rax
.text:000000000049535F                 lea     rax, [rsp+100h+var_58]
.text:0000000000495367                 mov     [rsp+100h+var_F0], rax
.text:000000000049536C                 mov     [rsp+100h+var_E8], 1
.text:0000000000495375                 mov     [rsp+100h+var_E0], 1
.text:000000000049537E                 call    sub_4886B0
.text:0000000000495383
.text:0000000000495383 loc_495383:                             ; CODE XREF: sub_495150+2C6↓j
.text:0000000000495383                 mov     rbp, [rsp+100h+var_8]
.text:000000000049538B                 add     rsp, 100h
.text:0000000000495392                 retn
.text:0000000000495393 ; ---------------------------------------------------------------------------
.text:0000000000495393
.text:0000000000495393 loc_495393:                             ; CODE XREF: sub_495150+1CC↑j

在495318 下断点，随便输入个值，然后观察断点情况，这里直接显示了正确的flag

[----------------------------------registers-----------------------------------]
RAX: 0xc0000641d0 --> 0xc000080030 ("flag{1234}")
RBX: 0x2a ('*')
RCX: 0xc000080030 ("flag{1234}")
RDX: 0xc00007c060 ("flag{92094daf-33c9-431e-a85a-8bfbd5df98ad}")
RSI: 0xc00007c060 ("flag{92094daf-33c9-431e-a85a-8bfbd5df98ad}")
RDI: 0x38 ('8')
RBP: 0xc000074f88 --> 0xc000074f90 --> 0x429b1c (mov    eax,DWORD PTR [rip+0x16478e]        # 0x58e2b0)
RSP: 0xc000074e90 --> 0xc000078580 ("6789_-abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ012345", '\377' <repeats 45 times>, "\005\377\377:;<=>?")
RIP: 0x495318 (cmp    QWORD PTR [rax+0x8],rbx)
R8 : 0x0 
R9 : 0x0 
R10: 0x2a ('*')
R11: 0x2a ('*')
R12: 0xc00007c060 ("flag{92094daf-33c9-431e-a85a-8bfbd5df98ad}")
R13: 0xc000078580 ("6789_-abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ012345", '\377' <repeats 45 times>, "\005\377\377:;<=>?")
R14: 0x2a ('*')
R15: 0x40 ('@')


#flag{92094daf-33c9-431e-a85a-8bfbd5df98ad}