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/*
* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include "SimpleRegion.h"
#include <AK/ByteReader.h>
#include <string.h>
namespace UserspaceEmulator {
SimpleRegion::SimpleRegion(u32 base, u32 size)
: Region(base, size)
{
m_data = (u8*)calloc(1, size);
m_shadow_data = (u8*)malloc(size);
memset(m_shadow_data, 1, size);
}
SimpleRegion::~SimpleRegion()
{
free(m_shadow_data);
free(m_data);
}
ValueWithShadow<u8> SimpleRegion::read8(FlatPtr offset)
{
VERIFY(offset < size());
return { m_data[offset], m_shadow_data[offset] };
}
ValueWithShadow<u16> SimpleRegion::read16(u32 offset)
{
VERIFY(offset + 1 < size());
u16 value, shadow;
ByteReader::load<u16>(m_data + offset, value);
ByteReader::load<u16>(m_shadow_data + offset, shadow);
return { value, shadow };
}
ValueWithShadow<u32> SimpleRegion::read32(u32 offset)
{
VERIFY(offset + 3 < size());
u32 value, shadow;
ByteReader::load<u32>(m_data + offset, value);
ByteReader::load<u32>(m_shadow_data + offset, shadow);
return { value, shadow };
}
ValueWithShadow<u64> SimpleRegion::read64(u32 offset)
{
VERIFY(offset + 7 < size());
u64 value, shadow;
ByteReader::load<u64>(m_data + offset, value);
ByteReader::load<u64>(m_shadow_data + offset, shadow);
return { value, shadow };
}
ValueWithShadow<u128> SimpleRegion::read128(u32 offset)
{
VERIFY(offset + 15 < size());
u128 value, shadow;
ByteReader::load(m_data + offset, value);
ByteReader::load(m_shadow_data + offset, shadow);
return { value, shadow };
}
ValueWithShadow<u256> SimpleRegion::read256(u32 offset)
{
VERIFY(offset + 31 < size());
u256 value, shadow;
ByteReader::load(m_data + offset, value);
ByteReader::load(m_shadow_data + offset, shadow);
return { value, shadow };
}
void SimpleRegion::write8(u32 offset, ValueWithShadow<u8> value)
{
VERIFY(offset < size());
m_data[offset] = value.value();
m_shadow_data[offset] = value.shadow()[0];
}
void SimpleRegion::write16(u32 offset, ValueWithShadow<u16> value)
{
VERIFY(offset + 1 < size());
ByteReader::store(m_data + offset, value.value());
ByteReader::store(m_shadow_data + offset, value.shadow());
}
void SimpleRegion::write32(u32 offset, ValueWithShadow<u32> value)
{
VERIFY(offset + 3 < size());
ByteReader::store(m_data + offset, value.value());
ByteReader::store(m_shadow_data + offset, value.shadow());
}
void SimpleRegion::write64(u32 offset, ValueWithShadow<u64> value)
{
VERIFY(offset + 7 < size());
ByteReader::store(m_data + offset, value.value());
ByteReader::store(m_shadow_data + offset, value.shadow());
}
void SimpleRegion::write128(u32 offset, ValueWithShadow<u128> value)
{
VERIFY(offset + 15 < size());
ByteReader::store(m_data + offset, value.value());
ByteReader::store(m_shadow_data + offset, value.shadow());
}
void SimpleRegion::write256(u32 offset, ValueWithShadow<u256> value)
{
VERIFY(offset + 31 < size());
ByteReader::store(m_data + offset, value.value());
ByteReader::store(m_shadow_data + offset, value.shadow());
}
u8* SimpleRegion::cacheable_ptr(u32 offset)
{
return m_data + offset;
}
}
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