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Handle endianness for CALLDATALOAD correctly [#79877740]

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This commit is contained in:
Paweł Bylica 2014-10-21 17:35:18 +02:00
parent 8909c150a1
commit 05741c2d4e
1 changed files with 5 additions and 3 deletions
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8
libevmjit/Ext.cpp
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@ -8,6 +8,7 @@
#include <libdevcrypto/SHA3.h>
#include "Runtime.h"
#include "Endianness.h"
using namespace llvm;
@ -145,7 +146,8 @@ Value* Ext::calldataload(Value* _index)
{
m_builder.CreateStore(_index, m_args[0]);
m_builder.CreateCall(m_calldataload, m_args);
return m_builder.CreateLoad(m_args[1]);
auto ret = m_builder.CreateLoad(m_args[1]);
return Endianness::toNative(m_builder, ret);
}
Value* Ext::bswap(Value* _value)
@ -282,8 +284,8 @@ EXPORT void ext_calldataload(i256* _index, i256* _value)
auto index = static_cast<size_t>(llvm2eth(*_index));
assert(index + 31 > index); // TODO: Handle large index
auto b = reinterpret_cast<byte*>(_value);
for (size_t i = index, j = 31; i <= index + 31; ++i, --j)
b[j] = i < Runtime::getExt().data.size() ? Runtime::getExt().data[i] : 0;
for (size_t i = index, j = 0; i <= index + 31; ++i, ++j)
b[j] = i < Runtime::getExt().data.size() ? Runtime::getExt().data[i] : 0; // Keep Big Endian
// TODO: It all can be done by adding padding to data or by using min() algorithm without branch
}