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/*
* Copyright (c) 2020-2021, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include "SoftMMU.h"
#include <sys/mman.h>
namespace UserspaceEmulator {
class MallocRegionMetadata;
class MallocTracer;
class MmapRegion final : public Region {
public:
static NonnullOwnPtr<MmapRegion> create_anonymous(u32 base, u32 size, u32 prot, String name);
static NonnullOwnPtr<MmapRegion> create_file_backed(u32 base, u32 size, u32 prot, int flags, int fd, off_t offset, String name);
virtual ~MmapRegion() override;
virtual ValueWithShadow<u8> read8(u32 offset) override;
virtual ValueWithShadow<u16> read16(u32 offset) override;
virtual ValueWithShadow<u32> read32(u32 offset) override;
virtual ValueWithShadow<u64> read64(u32 offset) override;
virtual ValueWithShadow<u128> read128(u32 offset) override;
virtual ValueWithShadow<u256> read256(u32 offset) override;
virtual void write8(u32 offset, ValueWithShadow<u8>) override;
virtual void write16(u32 offset, ValueWithShadow<u16>) override;
virtual void write32(u32 offset, ValueWithShadow<u32>) override;
virtual void write64(u32 offset, ValueWithShadow<u64>) override;
virtual void write128(u32 offset, ValueWithShadow<u128>) override;
virtual void write256(u32 offset, ValueWithShadow<u256>) override;
virtual u8* data() override { return m_data; }
virtual u8* shadow_data() override { return m_shadow_data; }
bool is_malloc_block() const { return m_malloc; }
void set_malloc(bool b) { m_malloc = b; }
NonnullOwnPtr<MmapRegion> split_at(VirtualAddress);
int prot() const
{
return (is_readable() ? PROT_READ : 0) | (is_writable() ? PROT_WRITE : 0) | (is_executable() ? PROT_EXEC : 0);
}
void set_prot(int prot);
MallocRegionMetadata* malloc_metadata() { return m_malloc_metadata; }
void set_malloc_metadata(Badge<MallocTracer>, NonnullOwnPtr<MallocRegionMetadata> metadata) { m_malloc_metadata = move(metadata); }
String const& name() const { return m_name; }
String lib_name() const
{
if (m_name.contains("Loader.so"sv))
return "Loader.so";
auto const maybe_separator = m_name.find(':');
if (!maybe_separator.has_value())
return {};
return m_name.substring(0, *maybe_separator);
}
void set_name(String name);
private:
MmapRegion(u32 base, u32 size, int prot, u8* data, u8* shadow_data);
u8* m_data { nullptr };
u8* m_shadow_data { nullptr };
bool m_file_backed { false };
bool m_malloc { false };
OwnPtr<MallocRegionMetadata> m_malloc_metadata;
String m_name;
};
template<>
inline bool Region::fast_is<MmapRegion>() const { return m_mmap; }
}
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