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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [MC] - llvm-mc does not emit SHF_INFO_LINK flag for relocation sections"
href="https://bugs.llvm.org/show_bug.cgi?id=33275">33275</a>
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<th>Summary</th>
<td>[MC] - llvm-mc does not emit SHF_INFO_LINK flag for relocation sections
</td>
</tr>
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<th>Product</th>
<td>libraries
</td>
</tr>
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<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>Windows NT
</td>
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<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Severity</th>
<td>enhancement
</td>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>Backend: X86
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
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<th>Reporter</th>
<td>grimar@accesssoftek.com
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</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
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</tr></table>
<p>
<div>
<pre>If we have next code:
.section .foo,"ax",@progbits
aaa:
movl $aaa, %edx
And invoke:
llvm-mc -filetype=obj -triple=x86_64-pc-linux test.s -o test_mc.o
as test.s -o test_as.o
$as -V
GNU assembler version 2.26.1 (x86_64-linux-gnu) using BFD version (GNU Binutils
for Ubuntu) 2.26.1
Then output from gas and llvm-mc be different:
llvm-mc:
[ 4] .rela.foo RELA 0000000000000000 00000090
0000000000000018 0000000000000018 5 3 8
gas:
[ 5] .rela.foo RELA 0000000000000000 000000e0
0000000000000018 0000000000000018 I 7 4 8
gas sets SHF_INFO_LINK flag for relocation section. That is consistent with
spec (<a href="http://www.sco.com/developers/gabi/latest/ch4.sheader.html">http://www.sco.com/developers/gabi/latest/ch4.sheader.html</a>)
Which contains:
sh_info
...
If the sh_flags field for this section header includes the attribute
SHF_INFO_LINK, then this member represents a section header table index.
SHF_INFO_LINK
The sh_info field of this section header holds a section header table index.
llvm-mc should also set this flag.</pre>
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