<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/135480>135480</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            [libunwind] unw_regname is defined differently to libgcc libunwind
        </td>
    </tr>

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

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

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

<pre>
    It seems like LLVM libunwind is designed to be compatible with the libgcc libunwind api, as suggested in [/libunwind/include/libunwind.h](https://github.com/llvm/llvm-project/blob/339f58de16ac7a31869d189bec6cad7696958546/libunwind/include/libunwind.h#L9):
```
// Compatible with libunwind API documented at:
// http://www.nongnu.org/libunwind/man/libunwind(3).html
```

However the definition of `unw_regname` is different between the two libraries.

LibGCC libunwind:
```
const char *unw_regname(unw_regnum_t);
```

LLVM libunwind:
```
const char *unw_regname(unw_cursor_t *, unw_regnum_t) LIBUNWIND_AVAIL;
```

Not sure if this is intentional?
</pre>
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