336 lines
10 KiB
C++
336 lines
10 KiB
C++
#include "content/providers/gdb_provider.hpp"
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#include <cstring>
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#include <thread>
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#include <chrono>
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#include <imgui.h>
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#include <hex/ui/imgui_imhex_extensions.h>
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#include <hex/helpers/fmt.hpp>
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#include <hex/helpers/crypto.hpp>
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#include <hex/api/localization.hpp>
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#include <nlohmann/json.hpp>
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namespace hex::plugin::builtin::prv {
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using namespace std::chrono_literals;
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namespace gdb {
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namespace {
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u8 calculateChecksum(const std::string &data) {
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u64 checksum = 0;
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for (const auto &c : data)
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checksum += c;
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return checksum & 0xFF;
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}
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std::string createPacket(const std::string &data) {
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return hex::format("${}#{:02x}", data, calculateChecksum(data));
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}
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std::optional<std::string> parsePacket(const std::string &packet) {
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if (packet.length() < 4)
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return std::nullopt;
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if (!packet.starts_with('$'))
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return std::nullopt;
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if (packet[packet.length() - 3] != '#')
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return std::nullopt;
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std::string data = packet.substr(1, packet.length() - 4);
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std::string checksum = packet.substr(packet.length() - 2, 2);
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if (checksum.length() != 2 || crypt::decode16(checksum)[0] != calculateChecksum(data))
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return std::nullopt;
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return data;
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}
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}
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void sendAck(Socket &socket) {
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socket.writeString("+");
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}
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std::vector<u8> readMemory(Socket &socket, u64 address, size_t size) {
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std::string packet = createPacket(hex::format("m{:X},{:X}", address, size));
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socket.writeString(packet);
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auto receivedPacket = socket.readString(size * 2 + 4);
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if (receivedPacket.empty())
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return {};
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auto receivedData = parsePacket(receivedPacket);
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if (!receivedData.has_value())
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return {};
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if (receivedData->size() == 3 && receivedData->starts_with("E"))
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return {};
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auto data = crypt::decode16(receivedData.value());
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data.resize(size);
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return data;
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}
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void writeMemory(Socket &socket, u64 address, const void *buffer, size_t size) {
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std::vector<u8> bytes(size);
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std::memcpy(bytes.data(), buffer, size);
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std::string byteString = crypt::encode16(bytes);
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std::string packet = createPacket(hex::format("M{:X},{:X}:{}", address, size, byteString));
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socket.writeString(packet);
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auto receivedPacket = socket.readString(3);
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}
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bool enableNoAckMode(Socket &socket) {
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socket.writeString(createPacket("QStartNoAckMode"));
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auto ack = socket.readString(1);
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if (ack.empty() || ack[0] != '+')
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return false;
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auto receivedPacket = socket.readString(6);
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auto receivedData = parsePacket(receivedPacket);
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if (receivedData && *receivedData == "OK") {
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sendAck(socket);
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return true;
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} else {
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return false;
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}
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}
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}
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GDBProvider::GDBProvider() : Provider(), m_size(0xFFFF'FFFF) {
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}
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bool GDBProvider::isAvailable() const {
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return this->m_socket.isConnected();
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}
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bool GDBProvider::isReadable() const {
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return this->m_socket.isConnected();
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}
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bool GDBProvider::isWritable() const {
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return false;
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}
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bool GDBProvider::isResizable() const {
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return false;
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}
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bool GDBProvider::isSavable() const {
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return false;
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}
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void GDBProvider::read(u64 offset, void *buffer, size_t size, bool overlays) {
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if ((offset - this->getBaseAddress()) > (this->getActualSize() - size) || buffer == nullptr || size == 0)
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return;
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offset -= this->getBaseAddress();
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u64 alignedOffset = offset - (offset % CacheLineSize);
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if (size <= CacheLineSize) {
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std::scoped_lock lock(this->m_cacheLock);
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const auto &cacheLine = std::find_if(this->m_cache.begin(), this->m_cache.end(), [&](auto &line) {
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return line.address == alignedOffset;
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});
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if (cacheLine != this->m_cache.end()) {
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// Cache hit
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} else {
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// Cache miss
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this->m_cache.push_back({ alignedOffset, { 0 } });
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}
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if (cacheLine != this->m_cache.end())
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std::memcpy(buffer, &cacheLine->data[0] + (offset % CacheLineSize), size);
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} else {
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while (size > 0) {
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size_t readSize = std::min(size, CacheLineSize);
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this->readRaw(offset, buffer, readSize);
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size -= readSize;
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offset += readSize;
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}
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}
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for (u64 i = 0; i < size; i++)
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if (getPatches().contains(offset + i))
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reinterpret_cast<u8 *>(buffer)[i] = getPatches()[offset + PageSize * this->m_currPage + i];
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if (overlays)
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this->applyOverlays(offset, buffer, size);
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}
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void GDBProvider::write(u64 offset, const void *buffer, size_t size) {
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if ((offset - this->getBaseAddress()) > (this->getActualSize() - size) || buffer == nullptr || size == 0)
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return;
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offset -= this->getBaseAddress();
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gdb::writeMemory(this->m_socket, offset, buffer, size);
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}
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void GDBProvider::readRaw(u64 offset, void *buffer, size_t size) {
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if ((offset - this->getBaseAddress()) > (this->getActualSize() - size) || buffer == nullptr || size == 0)
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return;
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auto data = gdb::readMemory(this->m_socket, offset, size);
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std::memcpy(buffer, &data[0], data.size());
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}
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void GDBProvider::writeRaw(u64 offset, const void *buffer, size_t size) {
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if ((offset - this->getBaseAddress()) > (this->getActualSize() - size) || buffer == nullptr || size == 0)
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return;
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gdb::writeMemory(this->m_socket, offset, buffer, size);
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}
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void GDBProvider::save() {
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this->applyPatches();
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}
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void GDBProvider::saveAs(const std::fs::path &path) {
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hex::unused(path);
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}
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size_t GDBProvider::getActualSize() const {
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return this->m_size;
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}
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std::string GDBProvider::getName() const {
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std::string address = "-";
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std::string port = "-";
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if (this->isConnected()) {
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address = this->m_ipAddress;
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port = std::to_string(this->m_port);
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}
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return hex::format("hex.builtin.provider.gdb.name"_lang, address, port);
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}
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std::vector<std::pair<std::string, std::string>> GDBProvider::getDataInformation() const {
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return {
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{"hex.builtin.provider.gdb.server"_lang, hex::format("{}:{}", this->m_ipAddress, this->m_port)},
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};
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}
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bool GDBProvider::open() {
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this->m_socket.connect(this->m_ipAddress, this->m_port);
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if (!gdb::enableNoAckMode(this->m_socket)) {
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this->m_socket.disconnect();
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return false;
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}
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if (this->m_socket.isConnected()) {
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this->m_cacheUpdateThread = std::thread([this]() {
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auto cacheLine = this->m_cache.begin();
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while (this->isConnected()) {
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{
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std::scoped_lock lock(this->m_cacheLock);
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if (cacheLine != this->m_cache.end()) {
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auto data = gdb::readMemory(this->m_socket, cacheLine->address, 0x1000);
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while (this->m_cache.size() > 10) {
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this->m_cache.pop_front();
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cacheLine = this->m_cache.begin();
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}
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std::memcpy(cacheLine->data.data(), data.data(), data.size());
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}
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cacheLine++;
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if (cacheLine == this->m_cache.end())
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cacheLine = this->m_cache.begin();
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}
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std::this_thread::sleep_for(100ms);
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}
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});
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return Provider::open();
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} else {
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return false;
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}
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}
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void GDBProvider::close() {
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this->m_socket.disconnect();
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if (this->m_cacheUpdateThread.joinable()) {
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this->m_cacheUpdateThread.join();
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}
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Provider::close();
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}
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bool GDBProvider::isConnected() const {
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return this->m_socket.isConnected();
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}
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void GDBProvider::drawLoadInterface() {
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ImGui::InputText("hex.builtin.provider.gdb.ip"_lang, this->m_ipAddress);
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ImGui::InputInt("hex.builtin.provider.gdb.port"_lang, &this->m_port, 0, 0);
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ImGui::Separator();
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ImGui::InputHexadecimal("hex.builtin.common.size"_lang, &this->m_size, ImGuiInputTextFlags_CharsHexadecimal);
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if (this->m_port < 0)
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this->m_port = 0;
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else if (this->m_port > 0xFFFF)
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this->m_port = 0xFFFF;
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}
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void GDBProvider::loadSettings(const nlohmann::json &settings) {
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Provider::loadSettings(settings);
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this->m_ipAddress = settings["ip"].get<std::string>();
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this->m_port = settings["port"].get<int>();
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this->m_size = settings["size"].get<size_t>();
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}
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nlohmann::json GDBProvider::storeSettings(nlohmann::json settings) const {
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settings["ip"] = this->m_ipAddress;
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settings["port"] = this->m_port;
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settings["size"] = this->m_size;
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return Provider::storeSettings(settings);
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}
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std::pair<Region, bool> GDBProvider::getRegionValidity(u64 address) const {
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address -= this->getBaseAddress();
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if (address < this->getActualSize())
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return { Region { this->getBaseAddress() + address, this->getActualSize() - address }, true };
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else
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return { Region::Invalid(), false };
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}
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} |