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Enforce non-empty data section

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Rodrigo Q. Saramago 2022-12-06 13:43:52 +01:00 committed by Daniel Kirchner
parent 1499bf7b59
commit 8a1bbf1345
1 changed files with 7 additions and 2 deletions
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9
libevmasm/Assembly.cpp
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@ -774,10 +774,15 @@ LinkerObject const& Assembly::assemble() const
toBigEndian(ret.bytecode.size(), r); toBigEndian(ret.bytecode.size(), r);
} }
auto const dataLength = ret.bytecode.size() - dataStart; auto dataLength = ret.bytecode.size() - dataStart;
if (m_eofVersion.has_value()) if (m_eofVersion.has_value())
{ {
assertThrow(/*dataLength >= 0 && */ dataLength <= 0xffff, AssemblyException, "Invalid data section size."); if (dataLength == 0)
{
ret.bytecode.push_back(0);
dataLength++;
}
assertThrow(dataLength > 0u && dataLength <= 0xffff, AssemblyException, "Invalid data section size.");
toBigEndian(dataLength, eofDataLength); toBigEndian(dataLength, eofDataLength);
} }