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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - llvm-objcopy produces corrupted .debug_str for elf32-x86-64 (X32 ABI) emulation (Z_DATA_ERROR)"
href="https://bugs.llvm.org/show_bug.cgi?id=45243">45243</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>llvm-objcopy produces corrupted .debug_str for elf32-x86-64 (X32 ABI) emulation (Z_DATA_ERROR)
</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>All
</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-objcopy/strip
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>ndesaulniers@google.com
</td>
</tr>
<tr>
<th>CC</th>
<td>alexander.v.shaposhnikov@gmail.com, jake.h.ehrlich@gmail.com, jh7370.2008@my.bristol.ac.uk, llvm-bugs@lists.llvm.org, maskray@google.com, rupprecht@google.com, srhines@google.com
</td>
</tr>
<tr>
<th>Blocks</th>
<td>4068
</td>
</tr></table>
<p>
<div>
<pre>via: <a href="https://github.com/ClangBuiltLinux/linux/issues/514">https://github.com/ClangBuiltLinux/linux/issues/514</a>
$ wget
<a href="https://github.com/ClangBuiltLinux/linux/files/4351404/cbl-514-out.x86_64.tar.gz">https://github.com/ClangBuiltLinux/linux/files/4351404/cbl-514-out.x86_64.tar.gz</a>
$ gunzip cbl-514-out.x86_64.tar.gz
$ tar xf cbl-514-out.x86_64.tar
$ cd out.x86_64
$ llvm-objcopy -O elf32-x86-64 arch/x86/entry/vdso/vgetcpu.o foo.o
$ llvm-dwarfdump foo.o
error: failed to decompress '.debug_loc', zlib error: Z_DATA_ERROR
error: failed to decompress '.debug_abbrev', zlib error: Z_DATA_ERROR
error: failed to decompress '.debug_info', zlib error: Z_DATA_ERROR
error: failed to decompress '.debug_str', zlib error: Z_DATA_ERROR
error: failed to decompress '.debug_line', zlib error: Z_DATA_ERROR
...
$ objcopy -O elf32-x86-64 arch/x86/entry/vdso/vgetcpu.o foo.o
$ llvm-dwarfdump foo.o
(different issues)
It seems the compressed debug info is corrupted; lld chokes on this eventually
when passed these objects, but looks like the error actually comes from
llvm-objcopy.</pre>
</div>
</p>
<div id="referenced">
<hr style="border: 1px dashed #969696">
<b>Referenced Bugs:</b>
<ul>
<li>
[<a class="bz_bug_link
bz_status_CONFIRMED "
title="CONFIRMED - [Meta] Compiling the Linux kernel with clang"
href="https://bugs.llvm.org/show_bug.cgi?id=4068">Bug 4068</a>] [Meta] Compiling the Linux kernel with clang
</li>
</ul>
</div>
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