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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - arch/x86/entry/entry_64_compat.S: Assertion `OS.tell() - Start == Layout.getSectionAddressSize(Sec)' failed"
href="https://bugs.llvm.org/show_bug.cgi?id=45190">45190</a>
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<th>Summary</th>
<td>arch/x86/entry/entry_64_compat.S: Assertion `OS.tell() - Start == Layout.getSectionAddressSize(Sec)' failed
</td>
</tr>
<tr>
<th>Product</th>
<td>libraries
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>All
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Severity</th>
<td>enhancement
</td>
</tr>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>MC
</td>
</tr>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>caij2003@gmail.com
</td>
</tr>
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<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>Building above file in the linux kernel triggered the assertion failure. The
reason is due to the following code pattern
$ cat bad.s
.macro ALTERNATIVE newinstr
.skip 144f-143f,0x0
.pushsection .altinstr_replacement,"ax"
143:
\newinstr
144:
.popsection
.endm
.section .entry.text, "ax"
ALTERNATIVE "jmp .Lint80_keep_stack"
.Lint80_keep_stack:
$ gcc -c bad.s
$ echo $?
0</pre>
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