mirror of
https://github.com/LadybirdBrowser/ladybird.git
synced 2025-05-12 06:02:51 +00:00
107 lines
3.1 KiB
C++
107 lines
3.1 KiB
C++
/*
|
|
* 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) };
|
|
}
|
|
|
|
ValueWithShadow<u128> SimpleRegion::read128(u32 offset)
|
|
{
|
|
VERIFY(offset + 15 < size());
|
|
return { *reinterpret_cast<const u128*>(m_data + offset), *reinterpret_cast<const u128*>(m_shadow_data + offset) };
|
|
}
|
|
|
|
ValueWithShadow<u256> SimpleRegion::read256(u32 offset)
|
|
{
|
|
VERIFY(offset + 31 < size());
|
|
return { *reinterpret_cast<const u256*>(m_data + offset), *reinterpret_cast<const u256*>(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();
|
|
}
|
|
void SimpleRegion::write128(u32 offset, ValueWithShadow<u128> value)
|
|
{
|
|
VERIFY(offset + 15 < size());
|
|
*reinterpret_cast<u128*>(m_data + offset) = value.value();
|
|
*reinterpret_cast<u128*>(m_shadow_data + offset) = value.shadow();
|
|
}
|
|
void SimpleRegion::write256(u32 offset, ValueWithShadow<u256> value)
|
|
{
|
|
VERIFY(offset + 31 < size());
|
|
*reinterpret_cast<u256*>(m_data + offset) = value.value();
|
|
*reinterpret_cast<u256*>(m_shadow_data + offset) = value.shadow();
|
|
}
|
|
|
|
u8* SimpleRegion::cacheable_ptr(u32 offset)
|
|
{
|
|
return m_data + offset;
|
|
}
|
|
|
|
}
|