1 files changed, 121 insertions, 0 deletions
diff --git a/src/core/hle/kernel/svc/svc_exception.cpp b/src/core/hle/kernel/svc/svc_exception.cpp
new file mode 100644
index 000000000..fb9f133c1
--- /dev/null
+++ b/src/core/hle/kernel/svc/svc_exception.cpp
@@ -0,0 +1,121 @@
+// SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include "core/core.h"
+#include "core/debugger/debugger.h"
+#include "core/hle/kernel/k_thread.h"
+#include "core/hle/kernel/svc.h"
+#include "core/hle/kernel/svc_types.h"
+#include "core/memory.h"
+#include "core/reporter.h"
+
+namespace Kernel::Svc {
+
+/// Break program execution
+void Break(Core::System& system, u32 reason, u64 info1, u64 info2) {
+    BreakReason break_reason =
+        static_cast<BreakReason>(reason & ~static_cast<u32>(BreakReason::NotificationOnlyFlag));
+    bool notification_only = (reason & static_cast<u32>(BreakReason::NotificationOnlyFlag)) != 0;
+
+    bool has_dumped_buffer{};
+    std::vector<u8> debug_buffer;
+
+    const auto handle_debug_buffer = [&](VAddr addr, u64 sz) {
+        if (sz == 0 || addr == 0 || has_dumped_buffer) {
+            return;
+        }
+
+        auto& memory = system.Memory();
+
+        // This typically is an error code so we're going to assume this is the case
+        if (sz == sizeof(u32)) {
+            LOG_CRITICAL(Debug_Emulated, "debug_buffer_err_code={:X}", memory.Read32(addr));
+        } else {
+            // We don't know what's in here so we'll hexdump it
+            debug_buffer.resize(sz);
+            memory.ReadBlock(addr, debug_buffer.data(), sz);
+            std::string hexdump;
+            for (std::size_t i = 0; i < debug_buffer.size(); i++) {
+                hexdump += fmt::format("{:02X} ", debug_buffer[i]);
+                if (i != 0 && i % 16 == 0) {
+                    hexdump += '\n';
+                }
+            }
+            LOG_CRITICAL(Debug_Emulated, "debug_buffer=\n{}", hexdump);
+        }
+        has_dumped_buffer = true;
+    };
+    switch (break_reason) {
+    case BreakReason::Panic:
+        LOG_CRITICAL(Debug_Emulated, "Userspace PANIC! info1=0x{:016X}, info2=0x{:016X}", info1,
+                     info2);
+        handle_debug_buffer(info1, info2);
+        break;
+    case BreakReason::Assert:
+        LOG_CRITICAL(Debug_Emulated, "Userspace Assertion failed! info1=0x{:016X}, info2=0x{:016X}",
+                     info1, info2);
+        handle_debug_buffer(info1, info2);
+        break;
+    case BreakReason::User:
+        LOG_WARNING(Debug_Emulated, "Userspace Break! 0x{:016X} with size 0x{:016X}", info1, info2);
+        handle_debug_buffer(info1, info2);
+        break;
+    case BreakReason::PreLoadDll:
+        LOG_INFO(Debug_Emulated,
+                 "Userspace Attempting to load an NRO at 0x{:016X} with size 0x{:016X}", info1,
+                 info2);
+        break;
+    case BreakReason::PostLoadDll:
+        LOG_INFO(Debug_Emulated, "Userspace Loaded an NRO at 0x{:016X} with size 0x{:016X}", info1,
+                 info2);
+        break;
+    case BreakReason::PreUnloadDll:
+        LOG_INFO(Debug_Emulated,
+                 "Userspace Attempting to unload an NRO at 0x{:016X} with size 0x{:016X}", info1,
+                 info2);
+        break;
+    case BreakReason::PostUnloadDll:
+        LOG_INFO(Debug_Emulated, "Userspace Unloaded an NRO at 0x{:016X} with size 0x{:016X}",
+                 info1, info2);
+        break;
+    case BreakReason::CppException:
+        LOG_CRITICAL(Debug_Emulated, "Signalling debugger. Uncaught C++ exception encountered.");
+        break;
+    default:
+        LOG_WARNING(
+            Debug_Emulated,
+            "Signalling debugger, Unknown break reason {:#X}, info1=0x{:016X}, info2=0x{:016X}",
+            reason, info1, info2);
+        handle_debug_buffer(info1, info2);
+        break;
+    }
+
+    system.GetReporter().SaveSvcBreakReport(reason, notification_only, info1, info2,
+                                            has_dumped_buffer ? std::make_optional(debug_buffer)
+                                                              : std::nullopt);
+
+    if (!notification_only) {
+        LOG_CRITICAL(
+            Debug_Emulated,
+            "Emulated program broke execution! reason=0x{:016X}, info1=0x{:016X}, info2=0x{:016X}",
+            reason, info1, info2);
+
+        handle_debug_buffer(info1, info2);
+
+        auto* const current_thread = GetCurrentThreadPointer(system.Kernel());
+        const auto thread_processor_id = current_thread->GetActiveCore();
+        system.ArmInterface(static_cast<std::size_t>(thread_processor_id)).LogBacktrace();
+    }
+
+    if (system.DebuggerEnabled()) {
+        auto* thread = system.Kernel().GetCurrentEmuThread();
+        system.GetDebugger().NotifyThreadStopped(thread);
+        thread->RequestSuspend(Kernel::SuspendType::Debug);
+    }
+}
+
+void Break32(Core::System& system, u32 reason, u32 info1, u32 info2) {
+    Break(system, reason, info1, info2);
+}
+
+} // namespace Kernel::Svc