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fix(evm): fix EXTCODECOPY to handle large offset #287

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Merged
zoowii merged 1 commit into from
Jan 27, 2026
Merged

fix(evm): fix EXTCODECOPY to handle large offset #287

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10 changes: 7 additions & 3 deletions src/compiler/evm_frontend/evm_mir_compiler.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -3338,9 +3338,13 @@ void EVMMirBuilder::handleExtCodeCopy(Operand AddressComponents,
Operand OffsetComponents,
Operand SizeComponents) {
const auto &RuntimeFunctions = getRuntimeFunctionTable();
normalizeOperandU64(DestOffsetComponents);
normalizeOperandU64(OffsetComponents);
normalizeOperandU64(SizeComponents);
// Use max uint64_t value if the offset/size is not 64-bit, because the
// extcodecopy will fill zeros when offset is beyond code size or handle large
// size properly.
uint64_t Non64Value = std::numeric_limits<uint64_t>::max();
normalizeOperandU64(DestOffsetComponents, &Non64Value);
normalizeOperandU64(OffsetComponents, &Non64Value);
normalizeOperandU64(SizeComponents, &Non64Value);
#ifdef ZEN_ENABLE_EVM_GAS_REGISTER
syncGasToMemory();
#endif
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