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    <head>
      <base href="https://bugs.llvm.org/">
    </head>
    <body><table border="1" cellspacing="0" cellpadding="8">
        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - Improve error message for malformed ELF"
   href="https://bugs.llvm.org/show_bug.cgi?id=40866">40866</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>Improve error message for malformed ELF
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>tools
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>trunk
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>PC
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>Windows NT
          </td>
        </tr>

        <tr>
          <th>Status</th>
          <td>NEW
          </td>
        </tr>

        <tr>
          <th>Severity</th>
          <td>enhancement
          </td>
        </tr>

        <tr>
          <th>Priority</th>
          <td>P
          </td>
        </tr>

        <tr>
          <th>Component</th>
          <td>llvm-readobj
          </td>
        </tr>

        <tr>
          <th>Assignee</th>
          <td>unassignedbugs@nondot.org
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>jh7370.2008@my.bristol.ac.uk
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>jh7370.2008@my.bristol.ac.uk, llvm-bugs@lists.llvm.org
          </td>
        </tr></table>
      <p>
        <div>
        <pre>The error message produced by llvm-readobj when there is a parse failure is
unhelpful:

"Error reading file: Invalid data was encountered while parsing the file."

In the particular case I'm seeing it, the file has been modified such that the
offset/size fields of the dynamic segment point after the end of the file.
Ideally the error message would say what went wrong specifically, e.g.
"PT_DYNAMIC segment does not appear to be wholly within the file. p_offset =
0x1234, p_filesz = 0x4321, file size = 0x1000".</pre>
        </div>
      </p>


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