mirror of
https://github.com/RGBCube/serenity
synced 2025-10-31 20:42:43 +00:00
107 lines
3.1 KiB
C++
107 lines
3.1 KiB
C++
/*
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* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include "SimpleRegion.h"
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#include <string.h>
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namespace UserspaceEmulator {
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SimpleRegion::SimpleRegion(u32 base, u32 size)
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: Region(base, size)
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{
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m_data = (u8*)calloc(1, size);
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m_shadow_data = (u8*)malloc(size);
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memset(m_shadow_data, 1, size);
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}
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SimpleRegion::~SimpleRegion()
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{
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free(m_shadow_data);
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free(m_data);
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}
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ValueWithShadow<u8> SimpleRegion::read8(FlatPtr offset)
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{
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VERIFY(offset < size());
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return { *reinterpret_cast<const u8*>(m_data + offset), *reinterpret_cast<const u8*>(m_shadow_data + offset) };
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}
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ValueWithShadow<u16> SimpleRegion::read16(u32 offset)
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{
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VERIFY(offset + 1 < size());
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return { *reinterpret_cast<const u16*>(m_data + offset), *reinterpret_cast<const u16*>(m_shadow_data + offset) };
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}
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ValueWithShadow<u32> SimpleRegion::read32(u32 offset)
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{
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VERIFY(offset + 3 < size());
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return { *reinterpret_cast<const u32*>(m_data + offset), *reinterpret_cast<const u32*>(m_shadow_data + offset) };
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}
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ValueWithShadow<u64> SimpleRegion::read64(u32 offset)
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{
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VERIFY(offset + 7 < size());
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return { *reinterpret_cast<const u64*>(m_data + offset), *reinterpret_cast<const u64*>(m_shadow_data + offset) };
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}
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ValueWithShadow<u128> SimpleRegion::read128(u32 offset)
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{
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VERIFY(offset + 15 < size());
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return { *reinterpret_cast<const u128*>(m_data + offset), *reinterpret_cast<const u128*>(m_shadow_data + offset) };
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}
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ValueWithShadow<u256> SimpleRegion::read256(u32 offset)
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{
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VERIFY(offset + 31 < size());
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return { *reinterpret_cast<const u256*>(m_data + offset), *reinterpret_cast<const u256*>(m_shadow_data + offset) };
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}
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void SimpleRegion::write8(u32 offset, ValueWithShadow<u8> value)
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{
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VERIFY(offset < size());
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*reinterpret_cast<u8*>(m_data + offset) = value.value();
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*reinterpret_cast<u8*>(m_shadow_data + offset) = value.shadow();
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}
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void SimpleRegion::write16(u32 offset, ValueWithShadow<u16> value)
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{
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VERIFY(offset + 1 < size());
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*reinterpret_cast<u16*>(m_data + offset) = value.value();
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*reinterpret_cast<u16*>(m_shadow_data + offset) = value.shadow();
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}
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void SimpleRegion::write32(u32 offset, ValueWithShadow<u32> value)
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{
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VERIFY(offset + 3 < size());
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*reinterpret_cast<u32*>(m_data + offset) = value.value();
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*reinterpret_cast<u32*>(m_shadow_data + offset) = value.shadow();
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}
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void SimpleRegion::write64(u32 offset, ValueWithShadow<u64> value)
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{
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VERIFY(offset + 7 < size());
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*reinterpret_cast<u64*>(m_data + offset) = value.value();
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*reinterpret_cast<u64*>(m_shadow_data + offset) = value.shadow();
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}
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void SimpleRegion::write128(u32 offset, ValueWithShadow<u128> value)
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{
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VERIFY(offset + 15 < size());
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*reinterpret_cast<u128*>(m_data + offset) = value.value();
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*reinterpret_cast<u128*>(m_shadow_data + offset) = value.shadow();
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}
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void SimpleRegion::write256(u32 offset, ValueWithShadow<u256> value)
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{
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VERIFY(offset + 31 < size());
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*reinterpret_cast<u256*>(m_data + offset) = value.value();
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*reinterpret_cast<u256*>(m_shadow_data + offset) = value.shadow();
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}
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u8* SimpleRegion::cacheable_ptr(u32 offset)
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{
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return m_data + offset;
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}
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}
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