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// Copyright 2018 Citra Emulator Project
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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#include "common/memory_hook.h"
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namespace Common {
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MemoryHook::~MemoryHook() = default;
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} // namespace Common
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// Copyright 2016 Citra Emulator Project
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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#pragma once
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#include <memory>
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#include <optional>
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#include "common/common_types.h"
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namespace Common {
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/**
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* Memory hooks have two purposes:
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* 1. To allow reads and writes to a region of memory to be intercepted. This is used to implement
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* texture forwarding and memory breakpoints for debugging.
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* 2. To allow for the implementation of MMIO devices.
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*
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* A hook may be mapped to multiple regions of memory.
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*
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* If a std::nullopt or false is returned from a function, the read/write request is passed through
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* to the underlying memory region.
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*/
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class MemoryHook {
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public:
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virtual ~MemoryHook();
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virtual std::optional<bool> IsValidAddress(VAddr addr) = 0;
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virtual std::optional<u8> Read8(VAddr addr) = 0;
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virtual std::optional<u16> Read16(VAddr addr) = 0;
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virtual std::optional<u32> Read32(VAddr addr) = 0;
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virtual std::optional<u64> Read64(VAddr addr) = 0;
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virtual bool ReadBlock(VAddr src_addr, void* dest_buffer, std::size_t size) = 0;
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virtual bool Write8(VAddr addr, u8 data) = 0;
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virtual bool Write16(VAddr addr, u16 data) = 0;
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virtual bool Write32(VAddr addr, u32 data) = 0;
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virtual bool Write64(VAddr addr, u64 data) = 0;
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virtual bool WriteBlock(VAddr dest_addr, const void* src_buffer, std::size_t size) = 0;
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};
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using MemoryHookPointer = std::shared_ptr<MemoryHook>;
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} // namespace Common
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// Copyright 2016 Citra Emulator Project
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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#include <algorithm>
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#include "common/page_table.h"
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#include "core/core.h"
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#include "core/hle/kernel/memory/page_table.h"
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#include "core/hle/kernel/process.h"
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#include "core/memory.h"
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#include "tests/core/arm/arm_test_common.h"
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namespace ArmTests {
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TestEnvironment::TestEnvironment(bool mutable_memory_)
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: mutable_memory(mutable_memory_),
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test_memory(std::make_shared<TestMemory>(this)), kernel{Core::System::GetInstance()} {
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auto& system = Core::System::GetInstance();
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auto process = Kernel::Process::Create(system, "", Kernel::Process::ProcessType::Userland);
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page_table = &process->PageTable().PageTableImpl();
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system.Memory().MapIoRegion(*page_table, 0x00000000, 0x80000000, test_memory);
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system.Memory().MapIoRegion(*page_table, 0x80000000, 0x80000000, test_memory);
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kernel.MakeCurrentProcess(process.get());
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}
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TestEnvironment::~TestEnvironment() {
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auto& system = Core::System::GetInstance();
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system.Memory().UnmapRegion(*page_table, 0x80000000, 0x80000000);
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system.Memory().UnmapRegion(*page_table, 0x00000000, 0x80000000);
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}
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void TestEnvironment::SetMemory64(VAddr vaddr, u64 value) {
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SetMemory32(vaddr + 0, static_cast<u32>(value));
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SetMemory32(vaddr + 4, static_cast<u32>(value >> 32));
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}
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void TestEnvironment::SetMemory32(VAddr vaddr, u32 value) {
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SetMemory16(vaddr + 0, static_cast<u16>(value));
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SetMemory16(vaddr + 2, static_cast<u16>(value >> 16));
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}
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void TestEnvironment::SetMemory16(VAddr vaddr, u16 value) {
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SetMemory8(vaddr + 0, static_cast<u8>(value));
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SetMemory8(vaddr + 1, static_cast<u8>(value >> 8));
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}
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void TestEnvironment::SetMemory8(VAddr vaddr, u8 value) {
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test_memory->data[vaddr] = value;
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}
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std::vector<WriteRecord> TestEnvironment::GetWriteRecords() const {
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return write_records;
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}
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void TestEnvironment::ClearWriteRecords() {
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write_records.clear();
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}
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TestEnvironment::TestMemory::~TestMemory() {}
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std::optional<bool> TestEnvironment::TestMemory::IsValidAddress(VAddr addr) {
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return true;
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}
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std::optional<u8> TestEnvironment::TestMemory::Read8(VAddr addr) {
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const auto iter = data.find(addr);
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if (iter == data.end()) {
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// Some arbitrary data
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return static_cast<u8>(addr);
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}
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return iter->second;
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}
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std::optional<u16> TestEnvironment::TestMemory::Read16(VAddr addr) {
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return *Read8(addr) | static_cast<u16>(*Read8(addr + 1)) << 8;
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}
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std::optional<u32> TestEnvironment::TestMemory::Read32(VAddr addr) {
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return *Read16(addr) | static_cast<u32>(*Read16(addr + 2)) << 16;
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}
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std::optional<u64> TestEnvironment::TestMemory::Read64(VAddr addr) {
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return *Read32(addr) | static_cast<u64>(*Read32(addr + 4)) << 32;
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}
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bool TestEnvironment::TestMemory::ReadBlock(VAddr src_addr, void* dest_buffer, std::size_t size) {
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VAddr addr = src_addr;
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u8* data = static_cast<u8*>(dest_buffer);
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for (std::size_t i = 0; i < size; i++, addr++, data++) {
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*data = *Read8(addr);
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}
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return true;
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}
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bool TestEnvironment::TestMemory::Write8(VAddr addr, u8 data) {
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env->write_records.emplace_back(8, addr, data);
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if (env->mutable_memory)
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env->SetMemory8(addr, data);
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return true;
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}
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bool TestEnvironment::TestMemory::Write16(VAddr addr, u16 data) {
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env->write_records.emplace_back(16, addr, data);
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if (env->mutable_memory)
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env->SetMemory16(addr, data);
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return true;
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}
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bool TestEnvironment::TestMemory::Write32(VAddr addr, u32 data) {
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env->write_records.emplace_back(32, addr, data);
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if (env->mutable_memory)
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env->SetMemory32(addr, data);
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return true;
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}
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bool TestEnvironment::TestMemory::Write64(VAddr addr, u64 data) {
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env->write_records.emplace_back(64, addr, data);
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if (env->mutable_memory)
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env->SetMemory64(addr, data);
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return true;
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}
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bool TestEnvironment::TestMemory::WriteBlock(VAddr dest_addr, const void* src_buffer,
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std::size_t size) {
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VAddr addr = dest_addr;
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const u8* data = static_cast<const u8*>(src_buffer);
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for (std::size_t i = 0; i < size; i++, addr++, data++) {
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env->write_records.emplace_back(8, addr, *data);
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if (env->mutable_memory)
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env->SetMemory8(addr, *data);
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}
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return true;
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}
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} // namespace ArmTests
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@ -1,93 +0,0 @@
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// Copyright 2016 Citra Emulator Project
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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#pragma once
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#include <tuple>
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#include <unordered_map>
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#include <vector>
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#include "common/common_types.h"
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#include "common/memory_hook.h"
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#include "core/hle/kernel/kernel.h"
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namespace Common {
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struct PageTable;
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}
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namespace ArmTests {
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struct WriteRecord {
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WriteRecord(std::size_t size, VAddr addr, u64 data) : size(size), addr(addr), data(data) {}
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std::size_t size;
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VAddr addr;
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u64 data;
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bool operator==(const WriteRecord& o) const {
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return std::tie(size, addr, data) == std::tie(o.size, o.addr, o.data);
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}
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};
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class TestEnvironment final {
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public:
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/*
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* Inititalise test environment
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* @param mutable_memory If false, writes to memory can never be read back.
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* (Memory is immutable.)
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*/
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explicit TestEnvironment(bool mutable_memory = false);
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/// Shutdown test environment
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~TestEnvironment();
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/// Sets value at memory location vaddr.
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void SetMemory8(VAddr vaddr, u8 value);
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void SetMemory16(VAddr vaddr, u16 value);
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void SetMemory32(VAddr vaddr, u32 value);
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void SetMemory64(VAddr vaddr, u64 value);
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/**
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* Whenever Memory::Write{8,16,32,64} is called within the test environment,
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* a new write-record is made.
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* @returns A vector of write records made since they were last cleared.
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*/
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std::vector<WriteRecord> GetWriteRecords() const;
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/// Empties the internal write-record store.
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void ClearWriteRecords();
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private:
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friend struct TestMemory;
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struct TestMemory final : Common::MemoryHook {
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explicit TestMemory(TestEnvironment* env_) : env(env_) {}
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TestEnvironment* env;
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~TestMemory() override;
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std::optional<bool> IsValidAddress(VAddr addr) override;
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std::optional<u8> Read8(VAddr addr) override;
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std::optional<u16> Read16(VAddr addr) override;
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std::optional<u32> Read32(VAddr addr) override;
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std::optional<u64> Read64(VAddr addr) override;
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bool ReadBlock(VAddr src_addr, void* dest_buffer, std::size_t size) override;
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bool Write8(VAddr addr, u8 data) override;
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bool Write16(VAddr addr, u16 data) override;
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bool Write32(VAddr addr, u32 data) override;
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bool Write64(VAddr addr, u64 data) override;
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bool WriteBlock(VAddr dest_addr, const void* src_buffer, std::size_t size) override;
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std::unordered_map<VAddr, u8> data;
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};
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bool mutable_memory;
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std::shared_ptr<TestMemory> test_memory;
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std::vector<WriteRecord> write_records;
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Common::PageTable* page_table = nullptr;
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Kernel::KernelCore kernel;
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};
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} // namespace ArmTests
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