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<base href="https://bugs.llvm.org/">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - elf::mergeSections doesn't set alignment to the power of 2"
href="https://bugs.llvm.org/show_bug.cgi?id=39044">39044</a>
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<th>Summary</th>
<td>elf::mergeSections doesn't set alignment to the power of 2
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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>
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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>normal
</td>
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<th>Priority</th>
<td>P
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<th>Component</th>
<td>ELF
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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<th>Reporter</th>
<td>csong@cs.ucr.edu
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<th>CC</th>
<td>llvm-bugs@lists.llvm.org
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<p>
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<pre>In elf::mergeSections (ELF/SyntheticSections.cpp), Alignment is calculated as
uint32_t Alignment = std::max<uint32_t>(MS->Alignment, MS->Entsize);
When MS->Entsize is larger and is not aligned to power of 2 (seems not
required?), the new alignment will fail the check in
InputSectionBase::InputSectionBase (ELF/InputSection.cpp)
uint32_t V = std::max<uint64_t>(Alignment, 1);
if (!isPowerOf2_64(V))
fatal(toString(File) + ": section sh_addralign is not a power of 2");</pre>
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