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<base href="https://llvm.org/bugs/" />
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - lld needs to provide _DYNAMIC symbol when creating a shared library"
href="https://llvm.org/bugs/show_bug.cgi?id=26732">26732</a>
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<th>Summary</th>
<td>lld needs to provide _DYNAMIC symbol when creating a shared library
</td>
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<th>Product</th>
<td>lld
</td>
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<th>Version</th>
<td>unspecified
</td>
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<th>Hardware</th>
<td>PC
</td>
</tr>
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<th>OS</th>
<td>FreeBSD
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Severity</th>
<td>normal
</td>
</tr>
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<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>All Bugs
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>emaste@freebsd.org
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr>
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<th>Blocks</th>
<td>23214
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=15943" name="attach_15943" title="sample test case for _DYNAMIC symbol">attachment 15943</a> <a href="attachment.cgi?id=15943&action=edit" title="sample test case for _DYNAMIC symbol">[details]</a></span>
sample test case for _DYNAMIC symbol
The linker-provided _DYNAMIC symbol is required by FreeBSD's rtld to find its
own DYNAMIC segment.
Example showing how it is used, from FreeBSD's rtld.c, rtld_machdep.h:
---
/* Return the address of the .dynamic section in the dynamic linker. */
#define rtld_dynamic(obj) \
((const Elf_Dyn *)((obj)->relocbase + (Elf_Addr)&_DYNAMIC))
#define RTLD_IS_DYNAMIC() (&_DYNAMIC != NULL)
extern Elf_Dyn _DYNAMIC;
#pragma weak _DYNAMIC
...
if (RTLD_IS_DYNAMIC()) {
objtmp.dynamic = rtld_dynamic(&objtmp);
---
Attached is a test case sample that passes with ld.bfd.</pre>
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