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- fix WriteSLEB128

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This commit is contained in:
Magnus Norddahl 2018-11-29 19:44:26 +01:00
parent 5d052fc565
commit b1bb82fe01
1 changed files with 29 additions and 5 deletions
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34
src/scripting/vm/jit_runtime.cpp
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@ -350,7 +350,19 @@ static void WriteSLEB128(TArray<uint8_t> &stream, int32_t v)
}
else
{
// To do: sign extended version
while (true)
{
if (v > -128)
{
WriteUInt8(stream, v & 0x7f);
break;
}
else
{
WriteUInt8(stream, v);
v >>= 7;
}
}
}
}
@ -363,19 +375,31 @@ static void WriteCIE(TArray<uint8_t> &stream, const TArray<uint8_t> &cieInstruct
WriteUInt32(stream, 0); // CIE ID
WriteUInt8(stream, 1); // CIE Version
WriteUInt8(stream, 'z');
WriteUInt8(stream, 'R');
//WriteUInt8(stream, 'R'); // fde encoding
WriteUInt8(stream, 0);
WriteULEB128(stream, minInstAlignment);
WriteSLEB128(stream, dataAlignmentFactor);
WriteUInt8(stream, returnAddressReg);
WriteULEB128(stream, 0);
// augmentation length and data (empty but aligned)
int padding = (stream.Size() + 1) % 8;
if (padding == 0)
{
WriteULEB128(stream, 0);
}
else
{
padding = 8 - padding;
WriteULEB128(stream, padding);
for (int i = 0; i <= padding; i++) WriteUInt8(stream, 0);
}
for (unsigned int i = 0; i < cieInstructions.Size(); i++)
stream.Push(cieInstructions[i]);
// Padding and update length field
unsigned int length = stream.Size() - lengthPos - 8;
int padding = stream.Size() % 4;
padding = stream.Size() % 8;
for (int i = 0; i <= padding; i++) WriteUInt8(stream, 0);
WriteLength(stream, lengthPos, length);
}
@ -398,7 +422,7 @@ static void WriteFDE(TArray<uint8_t> &stream, const TArray<uint8_t> &fdeInstruct
// Padding and update length field
unsigned int length = stream.Size() - lengthPos - 8;
int padding = stream.Size() % 4;
int padding = stream.Size() % 8;
for (int i = 0; i <= padding; i++) WriteUInt8(stream, 0);
WriteLength(stream, lengthPos, length);
}