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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Sets execute permissions but GNU objcopy does not"
href="https://bugs.llvm.org/show_bug.cgi?id=42082">42082</a>
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<th>Summary</th>
<td>Sets execute permissions but GNU objcopy does not
</td>
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<th>Product</th>
<td>tools
</td>
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<th>Version</th>
<td>trunk
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>Linux
</td>
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<th>Status</th>
<td>NEW
</td>
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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>llvm-objcopy/strip
</td>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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<th>Reporter</th>
<td>alexbrachetmialot@gmail.com
</td>
</tr>
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<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, rupprecht@google.com
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<p>
<div>
<pre>llvm-objcopy writes files with all 3 execute bits set. This is not what GNU
objcopy does. Is this intended? This happens on line 39 of Buffer.cpp where we
create the FileOutputBuffer, if we just remove the F_executable flag we will
have the same behaviour as GNU objcopy.
$ llvm-objcopy --strip-symbol=func test.o no_func_llvm.o
$ objcopy --strip-symbol=func test.o no_func_gnu.o
$ ls -l
-rw-rw-r-- 1 abrachet abrachet 1648 May 30 22:38 no_func_gnu.o
-rwxrwxr-x 1 abrachet abrachet 1648 May 30 22:38 no_func_llvm.o
For reference:
$ objcopy --version
GNU objcopy (GNU Binutils for Ubuntu) 2.30
$ llvm-objcopy --version
llvm-objcopy, compatible with GNU objcopy
LLVM (<a href="http://llvm.org/">http://llvm.org/</a>):
LLVM version 9.0.0svn
DEBUG build with assertions.
Default target: x86_64-unknown-linux-gnu
Host CPU: skylake
$ file test.o
test.o: ELF 64-bit LSB relocatable, x86-64, version 1 (SYSV), not stripped</pre>
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