fatal: Skeleton tasks, write ThrowFatalImpl.

stratosphere/fatal/fatal.json

@@ -4,7 +4,7 @@
 	"title_id_range_min":	"0x0100000000000034",
 	"title_id_range_max":	"0x0100000000000034",
 	"main_thread_stack_size":	"0x00010000",
-	"main_thread_priority":	15,
+	"main_thread_priority":	37,
 	"default_cpu_id":	3,
 	"process_category":	0,
 	"is_retail":	true,

stratosphere/fatal/source/fatal_event_manager.cpp

@@ -15,8 +15,15 @@
  */
  
 #include <switch.h>
+#include "fatal_types.hpp"
 #include "fatal_event_manager.hpp"
 
+static FatalEventManager g_event_manager;
+
+FatalEventManager *GetEventManager() {
+    return &g_event_manager;
+}
+
 FatalEventManager::FatalEventManager() {
     /* Just create all the events. */
     for (size_t i = 0; i < FatalEventManager::NumFatalEvents; i++) {
@@ -31,7 +38,7 @@ Result FatalEventManager::GetEvent(Handle *out) {
     
     /* Only allow GetEvent to succeed NumFatalEvents times. */
     if (this->events_gotten >= FatalEventManager::NumFatalEvents) {
-        return 0x8A3;
+        return FatalResult_TooManyEvents;
     }
     
     *out = this->events[this->events_gotten++].revent;

stratosphere/fatal/source/fatal_event_manager.hpp

@@ -30,3 +30,5 @@ class FatalEventManager {
         Result GetEvent(Handle *out);
         void SignalEvents();
 };
+
+FatalEventManager *GetEventManager();

stratosphere/fatal/source/fatal_main.cpp

@@ -67,11 +67,17 @@ void __appInit(void) {
         fatalSimple(rc);
     }
     
+    rc = pminfoInitialize();
+    if (R_FAILED(rc)) {
+        fatalSimple(rc);
+    }
+    
     CheckAtmosphereVersion(CURRENT_ATMOSPHERE_VERSION);
 }
 
 void __appExit(void) {
     /* Cleanup services. */
+    pminfoExit();
     setsysExit();
     smExit();
 }

stratosphere/fatal/source/fatal_private.cpp

@@ -18,8 +18,6 @@
 #include "fatal_private.hpp"
 #include "fatal_event_manager.hpp"
 
-static FatalEventManager g_EventManager;
-
 Result PrivateService::GetFatalEvent(Out<CopiedHandle> out_h) {
-    return g_EventManager.GetEvent(out_h.GetHandlePointer());
+    return GetEventManager()->GetEvent(out_h.GetHandlePointer());
 }

stratosphere/fatal/source/fatal_task.cpp

@@ -0,0 +1,55 @@
+/*
+ * Copyright (c) 2018 Atmosphère-NX
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+ 
+#include <switch.h>
+#include "fatal_types.hpp"
+#include "fatal_task.hpp"
+
+static constexpr size_t MaxTasks = 8;
+static HosThread g_task_threads[MaxTasks];
+static size_t g_num_threads = 0;
+
+
+static void RunTaskThreadFunc(void *arg) {
+    IFatalTask *task = reinterpret_cast<IFatalTask *>(arg);
+    
+    Result rc = task->Run();
+    if (R_FAILED(rc)) {
+        /* TODO: Log task failure, somehow? */
+    }
+}
+
+static void RunTask(IFatalTask *task) {    
+    if (g_num_threads >= MaxTasks) {
+        std::abort();
+    }
+    
+    HosThread *cur_thread = &g_task_threads[g_num_threads++];
+    
+    cur_thread->Initialize(&RunTaskThreadFunc, task, 0x4000, 15);
+    cur_thread->Start();
+}
+
+void RunFatalTasks(FatalContext *ctx, u64 title_id, bool error_report, Event *erpt_event, Event *battery_event) {
+    /* TODO: RunTask(new ErrorReportTask(ctx, title_id, error_report, erpt_event); */
+    /* TODO: RunTask(new PowerControlTask(ctx, title_id, battery_event); */
+    /* TODO: RunTask(new ShowFatalTask(ctx, title_id, battery_event); */
+    /* TODO: RunTask(new StopSoundTask(); */
+    /* TODO: RunTask(new BacklightControlTask(); */
+    /* TODO: RunTask(new AdjustClockTask(); */
+    /* TODO: RunTask(new PowerButtonTask(erpt_event); */
+    /* TODO: RunTask(new StateTransitionStop(); */
+}

stratosphere/fatal/source/fatal_task.hpp

@@ -0,0 +1,31 @@
+/*
+ * Copyright (c) 2018 Atmosphère-NX
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+ 
+#pragma once
+#include <switch.h>
+#include <stratosphere.hpp>
+#include "fatal_types.hpp"
+
+class IFatalTask {
+    protected:
+        FatalContext *ctx;
+        u64 title_id;
+    public:
+        virtual Result Run() = 0;
+        virtual const char *GetName() const = 0;
+};
+
+void RunFatalTasks(FatalContext *ctx, u64 title_id, bool error_report, Event *erpt_event, Event *battery_event);

stratosphere/fatal/source/fatal_types.hpp

@@ -19,6 +19,7 @@
 #include <stratosphere.hpp>
 
 enum FatalResult : Result {
+    FatalResult_AlreadyThrown = 0x6A3,
     FatalResult_TooManyEvents = 0x8A3,
     FatalResult_InRepairWithoutVolHeld = 0xAA3,
     FatalResult_InRepairWithoutTimeReviserCartridge = 0xCA3,
@@ -91,6 +92,11 @@ struct FatalCpuContext {
     u32 type;
 };
 
+struct FatalContext {
+    u32 error_code;
+    FatalCpuContext cpu_ctx;
+};
+
 static_assert(sizeof(Aarch64CpuContext) == 0x248, "Aarch64CpuContext definition!");
 static_assert(sizeof(Aarch32CpuContext) == 0xE0, "Aarch32CpuContext definition!");
 static_assert(sizeof(FatalCpuContext) == 0x250, "FatalCpuContext definition!");

stratosphere/fatal/source/fatal_user.cpp

@@ -16,9 +16,61 @@
  
 #include <switch.h>
 #include "fatal_user.hpp"
+#include "fatal_event_manager.hpp"
+#include "fatal_task.hpp"
 
-Result UserService::ThrowFatalImpl(u32 error, u64 pid, FatalType policy, FatalCpuContext *context) {
-    /* TODO */
+static bool g_thrown = false;
+
+static Result SetThrown() {
+    /* This should be fine, since fatal only has a single IPC thread. */
+    if (g_thrown) {
+        return FatalResult_AlreadyThrown;
+    }
+    
+    g_thrown = true;
+    return 0;
+}
+
+Result UserService::ThrowFatalImpl(u32 error, u64 pid, FatalType policy, FatalCpuContext *cpu_ctx) {
+    Result rc = 0;
+    FatalContext ctx;
+    ctx.error_code = error;
+    ctx.cpu_ctx = *cpu_ctx;
+    
+    /* Get title id. On failure, it'll be zero. */
+    u64 title_id = 0;
+    pminfoGetTitleId(&title_id, pid);
+    
+    switch (policy) {
+        case FatalType_ErrorReport:
+            /* TODO: Don't write an error report. */
+        case FatalType_ErrorReportAndErrorScreen:
+        case FatalType_ErrorScreen:
+            {
+                /* Ensure we only throw once. */
+                if (R_FAILED((rc = SetThrown()))) {
+                    return rc;
+                }
+                
+                /* Signal that fatal is about to happen. */
+                GetEventManager()->SignalEvents();
+                
+                /* Create events. */
+                Event erpt_event;
+                Event battery_event;
+                if (R_FAILED(eventCreate(&erpt_event, true)) || R_FAILED(eventCreate(&battery_event, true))) {
+                    std::abort();
+                }
+                
+                /* Run tasks. */
+                RunFatalTasks(&ctx, title_id, policy == FatalType_ErrorReportAndErrorScreen, &erpt_event, &battery_event);
+            }
+            break;
+        default:
+            /* N aborts here. Should we just return an error code? */
+            std::abort();
+    }
+    
     return 0;
 }