mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
synced 2024-11-15 03:27:49 +01:00
dmnt: add attach support to gdbstub
This commit is contained in:
Michael Scire
SciresM
parent
649a0052d0
commit
9f1f0c7cbd
@ -25,6 +25,7 @@ namespace ams::dmnt {
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constexpr size_t ServerThreadStackSize = util::AlignUp(4 * GdbPacketBufferSize + os::MemoryPageSize, os::ThreadStackAlignment);
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alignas(os::ThreadStackAlignment) constinit u8 g_server_thread_stack[ServerThreadStackSize];
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alignas(os::ThreadStackAlignment) constinit u8 g_events_thread_stack[16_KB];
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constinit os::ThreadType g_server_thread;
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@ -68,7 +69,7 @@ namespace ams::dmnt {
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{
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/* Create gdb server for the socket. */
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util::ConstructAt(g_gdb_server, client_fd);
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util::ConstructAt(g_gdb_server, client_fd, g_events_thread_stack, sizeof(g_events_thread_stack));
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ON_SCOPE_EXIT { util::DestroyAt(g_gdb_server); };
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/* Process for the server. */
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@ -20,13 +20,11 @@
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namespace ams::dmnt {
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namespace {
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constexpr const char TargetXmlAarch64[] =
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"l<?xml version=\"1.0\"?>"
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"<!DOCTYPE target SYSTEM \"gdb-target.dtd\">"
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"<target>"
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"<architecture>aarch64</architecture>"
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"<osabi>GNU/Linux</osabi>"
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"<xi:include href=\"aarch64-core.xml\"/>"
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"<xi:include href=\"aarch64-fpu.xml\"/>"
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"</target>";
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@ -299,6 +297,34 @@ namespace ams::dmnt {
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}
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}
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constexpr u64 DecodeHex(const char *s) {
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u64 value = 0;
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while (true) {
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const char c = *(s++);
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if (int v = DecodeHex(c); v >= 0) {
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value <<= 4;
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value |= v & 0xF;
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} else {
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break;
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}
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}
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return value;
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}
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void MemoryToHex(char *dst, const void *mem, size_t size) {
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const u8 *mem_u8 = static_cast<const u8 *>(mem);
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while (size-- > 0) {
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const u8 v = *(mem_u8++);
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*(dst++) = "0123456789abcdef"[v >> 4];
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*(dst++) = "0123456789abcdef"[v & 0xF];
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}
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*dst = 0;
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}
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void ParseOffsetLength(const char *packet, u32 &offset, u32 &length) {
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/* Default to zero. */
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offset = 0;
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@ -325,11 +351,194 @@ namespace ams::dmnt {
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constinit char g_process_list_buffer[0x2000];
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constinit os::SdkMutex g_event_request_lock;
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constinit os::SdkMutex g_event_lock;
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constinit os::SdkConditionVariable g_event_request_cv;
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constinit os::SdkConditionVariable g_event_done_cv;
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}
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GdbServerImpl::GdbServerImpl(int socket) : m_socket(socket), m_session(socket), m_packet_io() { /* ... */ }
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GdbServerImpl::GdbServerImpl(int socket, void *stack, size_t stack_size) : m_socket(socket), m_session(socket), m_packet_io(), m_state(State::Initial), m_event(os::EventClearMode_AutoClear) {
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/* Create and start the events thread. */
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R_ABORT_UNLESS(os::CreateThread(std::addressof(m_events_thread), DebugEventsThreadEntry, this, stack, stack_size, os::HighestThreadPriority - 1));
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os::StartThread(std::addressof(m_events_thread));
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GdbServerImpl::~GdbServerImpl() { /* ... */ }
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/* Set our state. */
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m_state = State::Running;
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}
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GdbServerImpl::~GdbServerImpl() {
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/* Set ourselves as killed. */
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m_killed = true;
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/* Signal to our events thread. */
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{
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std::scoped_lock lk(g_event_request_lock);
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g_event_request_cv.Signal();
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}
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/* Signal our event. */
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m_event.Signal();
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/* Wait for our thread to finish. */
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os::WaitThread(std::addressof(m_events_thread));
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os::DestroyThread(std::addressof(m_events_thread));
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/* Clear our state. */
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m_state = State::Destroyed;
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/* Detach. */
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if (m_attached) {
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R_ABORT_UNLESS(svc::CloseHandle(m_debug_handle));
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}
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}
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void GdbServerImpl::DebugEventsThread() {
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/* Process events. */
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{
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std::scoped_lock lk(g_event_lock);
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/* Loop while we're not killed. */
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while (!m_killed) {
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/* Wait for a request to come in. */
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g_event_request_cv.Wait(g_event_lock);
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/* Check that we're not killed now. */
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if (m_killed) {
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break;
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}
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/* Set ourselves as unattached. */
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m_attached = false;
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/* If we have a process id, attach. */
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if (R_FAILED(svc::DebugActiveProcess(std::addressof(m_debug_handle), m_process_id.value))) {
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AMS_DMNT2_GDB_LOG_DEBUG("Failed to attach to %016lx\n", m_process_id.value);
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m_debug_handle = svc::InvalidHandle;
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g_event_done_cv.Signal();
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continue;
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}
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/* Get the process id. */
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if (R_FAILED(svc::GetProcessId(std::addressof(m_process_id.value), m_debug_handle))) {
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AMS_DMNT2_GDB_LOG_DEBUG("Failed to get process id for debug handle\n");
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R_ABORT_UNLESS(svc::CloseHandle(m_debug_handle));
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m_debug_handle = svc::InvalidHandle;
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g_event_done_cv.Signal();
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continue;
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}
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/* Set ourselves as attached. */
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m_attached = true;
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/* Get the create process event. */
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{
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svc::DebugEventInfo d;
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R_ABORT_UNLESS(svc::GetDebugEvent(std::addressof(d), m_debug_handle));
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AMS_ABORT_UNLESS(d.type == svc::DebugEvent_CreateProcess);
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m_create_process_info = d.info.create_process;
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}
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/* Signal that we're done attaching. */
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g_event_done_cv.Signal();
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/* Process debug events without the lock held. */
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{
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g_event_lock.Unlock();
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this->ProcessDebugEvents();
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g_event_lock.Lock();
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}
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/* Clear our process ids. */
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m_process_id = os::InvalidProcessId;
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m_target_process_id = os::InvalidProcessId;
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}
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}
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/* Set our state. */
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m_state = State::Exited;
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}
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void GdbServerImpl::ProcessDebugEvents() {
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AMS_DMNT2_GDB_LOG_DEBUG("Processing debug events for %016lx\n", m_process_id.value);
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while (true) {
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/* Wait for an event to come in. */
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const Result wait_result = [&] ALWAYS_INLINE_LAMBDA {
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std::scoped_lock lk(g_event_lock);
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s32 dummy = -1;
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return svc::WaitSynchronization(std::addressof(dummy), std::addressof(m_debug_handle), 1, TimeSpan::FromMilliSeconds(20).GetNanoSeconds());
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}();
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/* Check if we're killed. */
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if (m_killed) {
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break;
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}
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/* If we didn't get an event, try again. */
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if (svc::ResultTimedOut::Includes(wait_result)) {
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continue;
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}
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/* Try to get the event. */
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svc::DebugEventInfo d;
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if (R_FAILED(svc::GetDebugEvent(std::addressof(d), m_debug_handle))) {
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continue;
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}
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/* Process the event. */
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switch (d.type) {
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default:
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AMS_DMNT2_GDB_LOG_DEBUG("Unhandled ProcessEvent %u\n", static_cast<u32>(d.type));
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break;
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}
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}
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}
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void GdbServerImpl::SetStopReplyPacket(GdbSignal signal) {
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/* Set the signal. */
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SetReply(m_reply_packet, "T%02X", static_cast<u32>(signal));
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/* Get the thread context. */
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svc::ThreadContext thread_context = {};
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svc::GetDebugThreadContext(std::addressof(thread_context), m_debug_handle, m_thread_id, svc::ThreadContextFlag_General | svc::ThreadContextFlag_Control);
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/* Add important registers. */
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/* TODO: aarch32 */
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{
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if (thread_context.fp != 0) {
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AppendReply(m_reply_packet, "1d:%016lx", util::ConvertToBigEndian(thread_context.fp));
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} else {
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AppendReply(m_reply_packet, "1d:0*,");
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}
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if (thread_context.sp != 0) {
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AppendReply(m_reply_packet, ";1f:%016lx", util::ConvertToBigEndian(thread_context.sp));
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} else {
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AppendReply(m_reply_packet, ";1f:0*,");
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}
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if (thread_context.pc != 0) {
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AppendReply(m_reply_packet, ";20:%016lx", util::ConvertToBigEndian(thread_context.pc));
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} else {
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AppendReply(m_reply_packet, ";20:0*,");
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}
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}
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/* Add the thread id. */
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AppendReply(m_reply_packet, ";thread:p%lx.%lx", m_target_process_id.value, m_thread_id);
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/* Add the thread core. */
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{
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u64 dummy;
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u32 core = 0;
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svc::GetDebugThreadParam(std::addressof(dummy), std::addressof(core), m_debug_handle, m_thread_id, svc::DebugThreadParam_CurrentCore);
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AppendReply(m_reply_packet, ";core:%u;", core);
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}
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}
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void GdbServerImpl::LoopProcess() {
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/* Process packets. */
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@ -366,6 +575,17 @@ namespace ams::dmnt {
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case 'H':
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this->H();
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break;
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case 'g':
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if (!this->g()) {
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m_killed = true;
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}
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break;
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case 'm':
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this->m();
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break;
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case 'v':
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this->v();
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break;
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case 'q':
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this->q();
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break;
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@ -383,8 +603,164 @@ namespace ams::dmnt {
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void GdbServerImpl::H() {
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if (this->HasDebugProcess()) {
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/* TODO */
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if (ParsePrefix(m_receive_packet, "Hg") || ParsePrefix(m_receive_packet, "HG")) {
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this->Hg();
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} else {
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SetReplyError(m_reply_packet, "E01");
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}
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} else {
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SetReplyError(m_reply_packet, "E01");
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}
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}
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void GdbServerImpl::Hg() {
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if (const char *dot = std::strchr(m_receive_packet, '.'); dot != nullptr) {
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m_thread_id = DecodeHex(dot + 1);
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AMS_DMNT2_GDB_LOG_DEBUG("Set thread id = %lx\n", m_thread_id);
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/* TODO: Validate thread exists for the process? */
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}
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SetReplyOk(m_reply_packet);
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}
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bool GdbServerImpl::g() {
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/* TODO: aarch32 */
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/* Get thread context. */
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svc::ThreadContext thread_context;
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if (R_FAILED(svc::GetDebugThreadContext(std::addressof(thread_context), m_debug_handle, m_thread_id, svc::ThreadContextFlag_All))) {
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return false;
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}
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/* Copy general purpose registers. */
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for (size_t i = 0; i < util::size(thread_context.r); ++i) {
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if (thread_context.r[i] != 0) {
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AppendReply(m_reply_packet, "%016lx", util::ConvertToBigEndian(thread_context.r[i]));
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} else {
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AppendReply(m_reply_packet, "0*,");
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}
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}
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/* Copy special registers. */
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if (thread_context.fp != 0) {
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AppendReply(m_reply_packet, "%016lx", util::ConvertToBigEndian(thread_context.fp));
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} else {
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AppendReply(m_reply_packet, "0*,");
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}
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if (thread_context.lr != 0) {
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AppendReply(m_reply_packet, "%016lx", util::ConvertToBigEndian(thread_context.lr));
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} else {
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AppendReply(m_reply_packet, "0*,");
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}
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if (thread_context.sp != 0) {
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AppendReply(m_reply_packet, "%016lx", util::ConvertToBigEndian(thread_context.sp));
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} else {
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AppendReply(m_reply_packet, "0*,");
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}
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if (thread_context.pc != 0) {
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AppendReply(m_reply_packet, "%016lx", util::ConvertToBigEndian(thread_context.pc));
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} else {
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AppendReply(m_reply_packet, "0*,");
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}
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if (thread_context.pstate != 0) {
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AppendReply(m_reply_packet, "%08x", util::ConvertToBigEndian(thread_context.pstate));
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} else {
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AppendReply(m_reply_packet, "0*\"0");
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}
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/* Copy FPU registers. */
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for (size_t i = 0; i < util::size(thread_context.v); ++i) {
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if (thread_context.v[i] != 0) {
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AppendReply(m_reply_packet, "%016lx%016lx", util::ConvertToBigEndian(static_cast<u64>(thread_context.v[i] >> 0)), util::ConvertToBigEndian(static_cast<u64>(thread_context.v[i] >> BITSIZEOF(u64))));
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} else {
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AppendReply(m_reply_packet, "0*<");
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}
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}
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return true;
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}
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void GdbServerImpl::m() {
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++m_receive_packet;
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/* Validate format. */
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const char *comma = std::strchr(m_receive_packet, ',');
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if (comma == nullptr) {
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SetReplyError(m_reply_packet, "E01");
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return;
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}
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/* Parse address/length. */
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const u64 address = DecodeHex(m_receive_packet);
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const u64 length = DecodeHex(comma + 1);
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if (length >= sizeof(m_buffer)) {
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SetReplyError(m_reply_packet, "E01");
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return;
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}
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/* Read the memory. */
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/* TODO: Detect partial readability? */
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if (R_FAILED(svc::ReadDebugProcessMemory(reinterpret_cast<uintptr_t>(m_buffer), m_debug_handle, address, length))) {
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SetReplyError(m_reply_packet, "E01");
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return;
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}
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/* Encode the memory. */
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MemoryToHex(m_reply_packet, m_buffer, length);
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}
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void GdbServerImpl::v() {
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if (ParsePrefix(m_receive_packet, "vAttach;")) {
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this->vAttach();
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} else {
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AMS_DMNT2_GDB_LOG_DEBUG("Not Implemented v: %s\n", m_receive_packet);
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}
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}
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void GdbServerImpl::vAttach() {
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if (!this->HasDebugProcess()) {
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/* Get the process id. */
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if (const u64 process_id = DecodeHex(m_receive_packet); process_id != 0) {
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/* Set our process id. */
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m_process_id = { process_id };
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m_target_process_id = { process_id };
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/* Wait for us to be attached. */
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bool attached;
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{
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std::scoped_lock lk(g_event_request_lock);
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g_event_request_cv.Signal();
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if (!g_event_done_cv.TimedWait(g_event_request_lock, TimeSpan::FromSeconds(2))) {
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m_event.Signal();
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}
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attached = m_attached;
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}
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/* If we're attached, send a stop reply packet. */
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if (attached) {
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/* Set our initial thread id. */
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{
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s32 dummy;
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u64 thread_id = 0;
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R_ABORT_UNLESS(svc::GetThreadList(std::addressof(dummy), std::addressof(thread_id), 1, m_debug_handle));
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m_thread_id = thread_id;
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}
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/* Set the stop reply packet. */
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this->SetStopReplyPacket(GdbSignal_Signal0);
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} else {
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SetReplyError(m_reply_packet, "E01");
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}
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} else {
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SetReplyError(m_reply_packet, "E01");
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}
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} else {
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SetReplyError(m_reply_packet, "E01");
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}
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@ -406,7 +782,11 @@ namespace ams::dmnt {
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void GdbServerImpl::qAttached() {
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if (this->HasDebugProcess()) {
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/* TODO: Parse/Save the requested process id */
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/* Parse/Save the requested process id */
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if (const char *colon = std::strchr(m_receive_packet, ':'); colon != nullptr) {
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m_target_process_id.value = DecodeHex(colon + 1);
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AMS_DMNT2_GDB_LOG_DEBUG("Queried for attached to %016lx\n", m_target_process_id.value);
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}
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SetReply(m_reply_packet, "1");
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} else {
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SetReplyError(m_reply_packet, "E01");
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@ -415,8 +795,20 @@ namespace ams::dmnt {
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void GdbServerImpl::qC() {
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if (this->HasDebugProcess()) {
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/* TODO */
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SetReplyError(m_reply_packet, "E01");
|
||||
/* Potentially get our thread id. */
|
||||
if (m_thread_id == 0) {
|
||||
s32 dummy;
|
||||
u64 thread_id = 0;
|
||||
if (R_FAILED(svc::GetThreadList(std::addressof(dummy), std::addressof(thread_id), 1, m_debug_handle))) {
|
||||
SetReplyError(m_reply_packet, "E01");
|
||||
return;
|
||||
}
|
||||
|
||||
m_thread_id = thread_id;
|
||||
}
|
||||
|
||||
/* Send the thread id. */
|
||||
SetReply(m_reply_packet, "QCp%lx.%lx", m_target_process_id.value, m_thread_id);
|
||||
} else {
|
||||
SetReplyError(m_reply_packet, "E01");
|
||||
}
|
||||
@ -430,10 +822,12 @@ namespace ams::dmnt {
|
||||
AppendReply(m_reply_packet, ";multiprocess+");
|
||||
AppendReply(m_reply_packet, ";qXfer:osdata:read+");
|
||||
AppendReply(m_reply_packet, ";qXfer:features:read+");
|
||||
AppendReply(m_reply_packet, ";qXfer:libraries:read+");
|
||||
AppendReply(m_reply_packet, ";qXfer:libraries-svr4:read+");
|
||||
AppendReply(m_reply_packet, ";augmented-libraries-svr4-read+");
|
||||
AppendReply(m_reply_packet, ";qXfer:threads:read+");
|
||||
AppendReply(m_reply_packet, ";swbreak+");
|
||||
AppendReply(m_reply_packet, ";hwbreak+");
|
||||
AppendReply(m_reply_packet, ";vContSupported+");
|
||||
}
|
||||
|
||||
void GdbServerImpl::qXfer() {
|
||||
@ -450,6 +844,11 @@ namespace ams::dmnt {
|
||||
/* Process. */
|
||||
if (ParsePrefix(m_receive_packet, "features:read:")) {
|
||||
this->qXferFeaturesRead();
|
||||
} else if (ParsePrefix(m_receive_packet, "threads:read:")) {
|
||||
if (!this->qXferThreadsRead()) {
|
||||
m_killed = true;
|
||||
SetReplyError(m_reply_packet, "E01");
|
||||
}
|
||||
} else {
|
||||
AMS_DMNT2_GDB_LOG_DEBUG("Not Implemented qxfer: %s\n", m_receive_packet);
|
||||
SetReplyError(m_reply_packet, "E01");
|
||||
@ -539,13 +938,10 @@ namespace ams::dmnt {
|
||||
|
||||
/* Get the create process event. */
|
||||
svc::DebugEventInfo d;
|
||||
while (true) {
|
||||
R_ABORT_UNLESS(svc::GetDebugEvent(std::addressof(d), handle));
|
||||
if (d.type == svc::DebugEvent_CreateProcess) {
|
||||
AppendReply(g_process_list_buffer, "<item>\n<column name=\"pid\">%lu</column>\n<column name=\"command\">%s</column>\n</item>\n", d.info.create_process.process_id, d.info.create_process.name);
|
||||
break;
|
||||
}
|
||||
}
|
||||
R_ABORT_UNLESS(svc::GetDebugEvent(std::addressof(d), handle));
|
||||
AMS_ABORT_UNLESS(d.type == svc::DebugEvent_CreateProcess);
|
||||
|
||||
AppendReply(g_process_list_buffer, "<item>\n<column name=\"pid\">%lu</column>\n<column name=\"command\">%s</column>\n</item>\n", d.info.create_process.process_id, d.info.create_process.name);
|
||||
}
|
||||
}
|
||||
}
|
||||
@ -577,6 +973,51 @@ namespace ams::dmnt {
|
||||
}
|
||||
}
|
||||
|
||||
bool GdbServerImpl::qXferThreadsRead() {
|
||||
/* Set header. */
|
||||
SetReply(m_reply_packet, "l<threads>");
|
||||
|
||||
/* Get thread list. */
|
||||
s32 num_threads;
|
||||
u64 thread_ids[0x80];
|
||||
if (R_FAILED(svc::GetThreadList(std::addressof(num_threads), thread_ids, util::size(thread_ids), m_debug_handle))) {
|
||||
return false;
|
||||
}
|
||||
|
||||
/* Cap thread limit at 128. */
|
||||
if (num_threads > 0x80) {
|
||||
num_threads = 0x80;
|
||||
}
|
||||
|
||||
/* Add all threads. */
|
||||
for (s32 i = 0; i < num_threads; ++i) {
|
||||
const auto thread_id = thread_ids[num_threads - 1 - i];
|
||||
|
||||
/* Check that we can get the thread context. */
|
||||
svc::ThreadContext thread_context;
|
||||
if (R_FAILED(svc::GetDebugThreadContext(std::addressof(thread_context), m_debug_handle, thread_id, svc::ThreadContextFlag_All))) {
|
||||
continue;
|
||||
}
|
||||
|
||||
/* Get the thread core. */
|
||||
u32 core = 0;
|
||||
{
|
||||
u64 dummy;
|
||||
u32 val32;
|
||||
if (R_SUCCEEDED(svc::GetDebugThreadParam(std::addressof(dummy), std::addressof(val32), m_debug_handle, m_thread_id, svc::DebugThreadParam_CurrentCore))) {
|
||||
core = val32;
|
||||
}
|
||||
}
|
||||
|
||||
/* TODO: `name=\"%s\"`? */
|
||||
AppendReply(m_reply_packet, "<thread id=\"p%lx.%lx\" core=\"%u\"/>", m_target_process_id.value, thread_id, core);
|
||||
}
|
||||
|
||||
AppendReply(m_reply_packet, "</threads>");
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
void GdbServerImpl::QuestionMark() {
|
||||
/* TODO */
|
||||
AMS_DMNT2_GDB_LOG_DEBUG("Not Implemented QuestionMark\n");
|
||||
|
||||
@ -20,6 +20,26 @@
|
||||
namespace ams::dmnt {
|
||||
|
||||
class GdbServerImpl {
|
||||
private:
|
||||
enum class State {
|
||||
Initial,
|
||||
Running,
|
||||
Exited,
|
||||
Destroyed,
|
||||
};
|
||||
|
||||
enum GdbSignal {
|
||||
GdbSignal_Signal0 = 0,
|
||||
GdbSignal_Interrupt = 2,
|
||||
GdbSignal_IllegalInstruction = 4,
|
||||
GdbSignal_BreakpointTrap = 5,
|
||||
GdbSignal_EmulationTrap = 7,
|
||||
GdbSignal_ArithmeticException = 8,
|
||||
GdbSignal_Killed = 9,
|
||||
GdbSignal_BusError = 10,
|
||||
GdbSignal_SegmentationFault = 11,
|
||||
GdbSignal_BadSystemCall = 12,
|
||||
};
|
||||
private:
|
||||
int m_socket;
|
||||
HtcsSession m_session;
|
||||
@ -27,9 +47,18 @@ namespace ams::dmnt {
|
||||
char *m_receive_packet{nullptr};
|
||||
char *m_reply_packet{nullptr};
|
||||
char m_buffer[GdbPacketBufferSize / 2];
|
||||
bool m_killed{false};
|
||||
svc::Handle m_debug_handle{svc::InvalidHandle};
|
||||
os::ThreadType m_events_thread;
|
||||
State m_state;
|
||||
bool m_attached{false};
|
||||
u64 m_thread_id{0};
|
||||
os::ProcessId m_process_id{os::InvalidProcessId};
|
||||
os::ProcessId m_target_process_id{os::InvalidProcessId};
|
||||
svc::DebugInfoCreateProcess m_create_process_info;
|
||||
os::Event m_event;
|
||||
public:
|
||||
GdbServerImpl(int socket);
|
||||
GdbServerImpl(int socket, void *thread_stack, size_t stack_size);
|
||||
~GdbServerImpl();
|
||||
|
||||
void LoopProcess();
|
||||
@ -40,9 +69,25 @@ namespace ams::dmnt {
|
||||
char *ReceivePacket(bool *out_break, char *dst, size_t size) { return m_packet_io.ReceivePacket(out_break, dst, size, std::addressof(m_session)); }
|
||||
private:
|
||||
bool HasDebugProcess() const { return m_debug_handle != svc::InvalidHandle; }
|
||||
bool Is64Bit() const { return true; /* TODO: Retrieve from debug process info. */ }
|
||||
bool Is64Bit() const { return (m_create_process_info.flags & svc::CreateProcessFlag_Is64Bit) == svc::CreateProcessFlag_Is64Bit; }
|
||||
bool Is64BitAddressSpace() const { return (m_create_process_info.flags & svc::CreateProcessFlag_AddressSpaceMask) == svc::CreateProcessFlag_AddressSpace64Bit; }
|
||||
private:
|
||||
static void DebugEventsThreadEntry(void *arg) { static_cast<GdbServerImpl *>(arg)->DebugEventsThread(); }
|
||||
void DebugEventsThread();
|
||||
void ProcessDebugEvents();
|
||||
void SetStopReplyPacket(GdbSignal signal);
|
||||
private:
|
||||
void H();
|
||||
void Hg();
|
||||
|
||||
bool g();
|
||||
|
||||
void m();
|
||||
|
||||
void v();
|
||||
|
||||
void vAttach();
|
||||
|
||||
void q();
|
||||
|
||||
void qAttached();
|
||||
@ -51,6 +96,7 @@ namespace ams::dmnt {
|
||||
void qXfer();
|
||||
void qXferFeaturesRead();
|
||||
void qXferOsdataRead();
|
||||
bool qXferThreadsRead();
|
||||
|
||||
void QuestionMark();
|
||||
};
|
||||
|
||||
Loading…
Reference in New Issue
Block a user