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/*
* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include "SimpleRegion.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 { *reinterpret_cast<const u8*>(m_data + offset), *reinterpret_cast<const u8*>(m_shadow_data + offset) };
}
ValueWithShadow<u16> SimpleRegion::read16(u32 offset)
{
VERIFY(offset + 1 < size());
return { *reinterpret_cast<const u16*>(m_data + offset), *reinterpret_cast<const u16*>(m_shadow_data + offset) };
}
ValueWithShadow<u32> SimpleRegion::read32(u32 offset)
{
VERIFY(offset + 3 < size());
return { *reinterpret_cast<const u32*>(m_data + offset), *reinterpret_cast<const u32*>(m_shadow_data + offset) };
}
ValueWithShadow<u64> SimpleRegion::read64(u32 offset)
{
VERIFY(offset + 7 < size());
return { *reinterpret_cast<const u64*>(m_data + offset), *reinterpret_cast<const u64*>(m_shadow_data + offset) };
}
void SimpleRegion::write8(u32 offset, ValueWithShadow<u8> value)
{
VERIFY(offset < size());
*reinterpret_cast<u8*>(m_data + offset) = value.value();
*reinterpret_cast<u8*>(m_shadow_data + offset) = value.shadow();
}
void SimpleRegion::write16(u32 offset, ValueWithShadow<u16> value)
{
VERIFY(offset + 1 < size());
*reinterpret_cast<u16*>(m_data + offset) = value.value();
*reinterpret_cast<u16*>(m_shadow_data + offset) = value.shadow();
}
void SimpleRegion::write32(u32 offset, ValueWithShadow<u32> value)
{
VERIFY(offset + 3 < size());
*reinterpret_cast<u32*>(m_data + offset) = value.value();
*reinterpret_cast<u32*>(m_shadow_data + offset) = value.shadow();
}
void SimpleRegion::write64(u32 offset, ValueWithShadow<u64> value)
{
VERIFY(offset + 7 < size());
*reinterpret_cast<u64*>(m_data + offset) = value.value();
*reinterpret_cast<u64*>(m_shadow_data + offset) = value.shadow();
}
u8* SimpleRegion::cacheable_ptr(u32 offset)
{
return m_data + offset;
}
}
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