<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/132411>132411</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            [lld-link] LLD-LINK produces broken forward imports in source DEF
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            new issue
      </td>
    </tr>

    <tr>
      <th>Assignees</th>
      <td>
      </td>
    </tr>

    <tr>
      <th>Reporter</th>
      <td>
          lhmouse
      </td>
    </tr>
</table>

<pre>
    First let's define an empty DLL that exports `CreateThread`, forwarded from Windows KERNEL32.DLL:

```c
// test.c
int
__stdcall
_DllMainCRTStartup(void* i, unsigned long r, void* p)
{ return 1; }
```

```plaintext
EXPORTS
  CreateThread = kernel32.CreateThread
```

Now build two DLLs, one with Microsoft LINK (good.dll) and one with LLD (bad.dll):

```plaintext
clang test.c -Wl,-DEF:test.def -shared -Wl,-nodefaultlib -Wl,kernel32.lib -o good.dll
clang test.c -Wl,-DEF:test.def -shared -Wl,-nodefaultlib -Wl,kernel32.lib -fuse-ld=lld -o bad.dll
```

The bad DLL will cause failure when it's loaded by another application, saying **\_kernel32.dll** is not found. Now let's open the good DLL with a hex editor:


And this is the bad DLL. The import from `_kernel32.CreateThread` is exactly the issue.


This bug exists only when targeting x86-32.

</pre>
<img width="1" height="1" alt="" src="http://email.email.llvm.org/o/eJy0VN9uqzgTfxrnZgQyNgRywUVaGuno5PT71FPp7F1l8ADeOjayTZO8_cokabvb1V7tSpYCnjDz-zMzwns1GMSaFHekaFZiDqN1tR4Pdva4aq081zvlfACNgbDSg8ReGQRhAA9TOEOz30MYRQA8TdYFD2RN7x2KgM-jQyHJmhJ2D711R-EkSuidPcAvZaQ9evj-8PT4sOcsbfZ7wreELmdNL6eLL2xH2A4C-pDGd2UCoduXFx9kJ7SOz43WP4Qy90_PP4NwYZ4Iq96skoRtQcXis1lYStDWDODi1S0-EbaJVco7cBhmZyAj_A5I2XwG8hdckxbKBDxFJA-__f9_T88_Cd0CfOYNhDfwis6g5iz9kyJfEj_aI7Sz0hLC0UZFfYRoDcJRhRF-qM5Zb_sA-2-P34GwarBWplJrwjYgjPz4637fxHgrbuGvon4G32lhhqu2kPzShN0nzcOO8O1yJ7GHxI_CobxFjZXYi1kHrdrr3TvJ5crCO7j_JH8_e0y0JLzRWsZyN65fVH0eMQaXDj0qraETs0fohdKzQziOaEBdmlpbEVuzPYMwNozoQEyTVp0IyprohRdnZQYgbBtPcf_yDmqRebu0mgdjA_R2NjKF6OltZuyEBsKIizRXPGEEASOeAKUK1n34xDJS3H07iAFJ0RBWjSFMPoaXQRhUGOc27eyBsN3s0SUiBNGNBzTBE7YT3uPyUJRVXvCiTzZ9uUlyXlVJK_oswXZdcrnuWMbza-_T7dZICKPykUP4kC2FqKE6xMG-zC1Z05e_b-o1jR_jSXRBn5ckyvsZ03-XFd902IkySxApTfKu7xOBvEpQZFR0rEeZV--sniOjdh4AT8oHD9bo88X2INyAITp6qtYJZxHlStZcbvhGrLDOypwVZcYoXY01zyopWtzItuAZ5R2Xbd5uWEYLWbIe25WqGWUF5SzLCs4ZTfOWbYoyK6q2q7I8R5JTPAilU63fDql1w2rRps44y7NspUWL2i8rmDGDx4tyhLG4kV0dP0raefAkpzoS-UgTVNDL7tZaJlqZV1I0cQcky6KYnJVzhx5aZ1_R3Hbw1VAPyoC3s-sQmofdana6_gdXYs3rTzI5-zt2gbDdgjQac6XyVrM_AgAA__8Q3_nZ">