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-rw-r--r--src/core/debugger/gdbstub.cpp171
-rw-r--r--src/core/debugger/gdbstub.h1
2 files changed, 158 insertions, 14 deletions
diff --git a/src/core/debugger/gdbstub.cpp b/src/core/debugger/gdbstub.cpp
index 0c36069a6..682651a86 100644
--- a/src/core/debugger/gdbstub.cpp
+++ b/src/core/debugger/gdbstub.cpp
@@ -34,6 +34,65 @@ constexpr char GDB_STUB_REPLY_ERR[] = "E01";
constexpr char GDB_STUB_REPLY_OK[] = "OK";
constexpr char GDB_STUB_REPLY_EMPTY[] = "";
+static u8 CalculateChecksum(std::string_view data) {
+ return std::accumulate(data.begin(), data.end(), u8{0},
+ [](u8 lhs, u8 rhs) { return static_cast<u8>(lhs + rhs); });
+}
+
+static std::string EscapeGDB(std::string_view data) {
+ std::string escaped;
+ escaped.reserve(data.size());
+
+ for (char c : data) {
+ switch (c) {
+ case '#':
+ escaped += "}\x03";
+ break;
+ case '$':
+ escaped += "}\x04";
+ break;
+ case '*':
+ escaped += "}\x0a";
+ break;
+ case '}':
+ escaped += "}\x5d";
+ break;
+ default:
+ escaped += c;
+ break;
+ }
+ }
+
+ return escaped;
+}
+
+static std::string EscapeXML(std::string_view data) {
+ std::string escaped;
+ escaped.reserve(data.size());
+
+ for (char c : data) {
+ switch (c) {
+ case '&':
+ escaped += "&amp;";
+ break;
+ case '"':
+ escaped += "&quot;";
+ break;
+ case '<':
+ escaped += "&lt;";
+ break;
+ case '>':
+ escaped += "&gt;";
+ break;
+ default:
+ escaped += c;
+ break;
+ }
+ }
+
+ return escaped;
+}
+
GDBStub::GDBStub(DebuggerBackend& backend_, Core::System& system_)
: DebuggerFrontend(backend_), system{system_} {
if (system.CurrentProcess()->Is64BitProcess()) {
@@ -255,6 +314,80 @@ void GDBStub::ExecuteCommand(std::string_view packet, std::vector<DebuggerAction
}
}
+// Structure offsets are from Atmosphere
+// See osdbg_thread_local_region.os.horizon.hpp and osdbg_thread_type.os.horizon.hpp
+
+static std::optional<std::string> GetNameFromThreadType32(Core::Memory::Memory& memory,
+ const Kernel::KThread* thread) {
+ // Read thread type from TLS
+ const VAddr tls_thread_type{memory.Read32(thread->GetTLSAddress() + 0x1fc)};
+ const VAddr argument_thread_type{thread->GetArgument()};
+
+ if (argument_thread_type && tls_thread_type != argument_thread_type) {
+ // Probably not created by nnsdk, no name available.
+ return std::nullopt;
+ }
+
+ if (!tls_thread_type) {
+ return std::nullopt;
+ }
+
+ const u16 version{memory.Read16(tls_thread_type + 0x26)};
+ VAddr name_pointer{};
+ if (version == 1) {
+ name_pointer = memory.Read32(tls_thread_type + 0xe4);
+ } else {
+ name_pointer = memory.Read32(tls_thread_type + 0xe8);
+ }
+
+ if (!name_pointer) {
+ // No name provided.
+ return std::nullopt;
+ }
+
+ return memory.ReadCString(name_pointer, 256);
+}
+
+static std::optional<std::string> GetNameFromThreadType64(Core::Memory::Memory& memory,
+ const Kernel::KThread* thread) {
+ // Read thread type from TLS
+ const VAddr tls_thread_type{memory.Read64(thread->GetTLSAddress() + 0x1f8)};
+ const VAddr argument_thread_type{thread->GetArgument()};
+
+ if (argument_thread_type && tls_thread_type != argument_thread_type) {
+ // Probably not created by nnsdk, no name available.
+ return std::nullopt;
+ }
+
+ if (!tls_thread_type) {
+ return std::nullopt;
+ }
+
+ const u16 version{memory.Read16(tls_thread_type + 0x46)};
+ VAddr name_pointer{};
+ if (version == 1) {
+ name_pointer = memory.Read64(tls_thread_type + 0x1a0);
+ } else {
+ name_pointer = memory.Read64(tls_thread_type + 0x1a8);
+ }
+
+ if (!name_pointer) {
+ // No name provided.
+ return std::nullopt;
+ }
+
+ return memory.ReadCString(name_pointer, 256);
+}
+
+static std::optional<std::string> GetThreadName(Core::System& system,
+ const Kernel::KThread* thread) {
+ if (system.CurrentProcess()->Is64BitProcess()) {
+ return GetNameFromThreadType64(system.Memory(), thread);
+ } else {
+ return GetNameFromThreadType32(system.Memory(), thread);
+ }
+}
+
static std::string_view GetThreadWaitReason(const Kernel::KThread* thread) {
switch (thread->GetWaitReasonForDebugging()) {
case Kernel::ThreadWaitReasonForDebugging::Sleep:
@@ -332,20 +465,36 @@ void GDBStub::HandleQuery(std::string_view command) {
} else if (command.starts_with("sThreadInfo")) {
// end of list
SendReply("l");
- } else if (command.starts_with("Xfer:threads:read")) {
+ } else if (command.starts_with("Xfer:threads:read::")) {
std::string buffer;
- buffer += R"(l<?xml version="1.0"?>)";
+ buffer += R"(<?xml version="1.0"?>)";
buffer += "<threads>";
const auto& threads = system.GlobalSchedulerContext().GetThreadList();
- for (const auto& thread : threads) {
- buffer += fmt::format(R"(<thread id="{:x}" core="{:d}" name="Thread {:d}">{}</thread>)",
+ for (const auto* thread : threads) {
+ auto thread_name{GetThreadName(system, thread)};
+ if (!thread_name) {
+ thread_name = fmt::format("Thread {:d}", thread->GetThreadID());
+ }
+
+ buffer += fmt::format(R"(<thread id="{:x}" core="{:d}" name="{}">{}</thread>)",
thread->GetThreadID(), thread->GetActiveCore(),
- thread->GetThreadID(), GetThreadState(thread));
+ EscapeXML(*thread_name), GetThreadState(thread));
}
buffer += "</threads>";
- SendReply(buffer);
+
+ const auto offset{command.substr(19)};
+ const auto amount{command.substr(command.find(',') + 1)};
+
+ const auto offset_val{static_cast<u64>(strtoll(offset.data(), nullptr, 16))};
+ const auto amount_val{static_cast<u64>(strtoll(amount.data(), nullptr, 16))};
+
+ if (offset_val + amount_val > buffer.size()) {
+ SendReply("l" + buffer.substr(offset_val));
+ } else {
+ SendReply("m" + buffer.substr(offset_val, amount_val));
+ }
} else if (command.starts_with("Attached")) {
SendReply("0");
} else if (command.starts_with("StartNoAckMode")) {
@@ -438,14 +587,10 @@ std::optional<std::string> GDBStub::DetachCommand() {
return data.substr(1, data.size() - 4);
}
-u8 GDBStub::CalculateChecksum(std::string_view data) {
- return std::accumulate(data.begin(), data.end(), u8{0},
- [](u8 lhs, u8 rhs) { return static_cast<u8>(lhs + rhs); });
-}
-
void GDBStub::SendReply(std::string_view data) {
- const auto output{
- fmt::format("{}{}{}{:02x}", GDB_STUB_START, data, GDB_STUB_END, CalculateChecksum(data))};
+ const auto escaped{EscapeGDB(data)};
+ const auto output{fmt::format("{}{}{}{:02x}", GDB_STUB_START, escaped, GDB_STUB_END,
+ CalculateChecksum(escaped))};
LOG_TRACE(Debug_GDBStub, "Writing reply: {}", output);
// C++ string support is complete rubbish
diff --git a/src/core/debugger/gdbstub.h b/src/core/debugger/gdbstub.h
index aa1f7de6c..1bb638187 100644
--- a/src/core/debugger/gdbstub.h
+++ b/src/core/debugger/gdbstub.h
@@ -34,7 +34,6 @@ private:
std::optional<std::string> DetachCommand();
Kernel::KThread* GetThreadByID(u64 thread_id);
- static u8 CalculateChecksum(std::string_view data);
void SendReply(std::string_view data);
void SendStatus(char status);
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-05 09:52:51 +0100