fatal: Implement fatal:p, fatal:u stub.

Makefile

@@ -40,11 +40,13 @@ dist: all
 	mkdir atmosphere-$(AMSVER)
 	mkdir atmosphere-$(AMSVER)/atmosphere
 	mkdir -p atmosphere-$(AMSVER)/atmosphere/titles/0100000000000036
+	mkdir -p atmosphere-$(AMSVER)/atmosphere/titles/0100000000000034
 	mkdir -p atmosphere-$(AMSVER)/atmosphere/titles/0100000000000032
 	cp fusee/fusee-secondary/fusee-secondary.bin atmosphere-$(AMSVER)/fusee-secondary.bin
 	cp common/defaults/BCT.ini atmosphere-$(AMSVER)/BCT.ini
 	cp common/defaults/loader.ini atmosphere-$(AMSVER)/atmosphere/loader.ini
 	cp stratosphere/creport/creport.nsp atmosphere-$(AMSVER)/atmosphere/titles/0100000000000036/exefs.nsp
+	cp stratosphere/fatal/fatal.nsp atmosphere-$(AMSVER)/atmosphere/titles/0100000000000034/exefs.nsp
 	cp stratosphere/set_mitm/set_mitm.nsp atmosphere-$(AMSVER)/atmosphere/titles/0100000000000032/exefs.nsp
 	touch atmosphere-$(AMSVER)/atmosphere/titles/0100000000000032/boot2.flag
 	cd atmosphere-$(AMSVER); zip -r ../atmosphere-$(AMSVER).zip ./*; cd ../;

stratosphere/Makefile

@@ -1,4 +1,4 @@
-KIPS := loader pm sm boot fs_mitm set_mitm creport
+KIPS := loader pm sm boot fs_mitm set_mitm creport fatal
 
 #TODO: boot2 ?
 

stratosphere/fatal/Makefile

@@ -0,0 +1,159 @@
+#---------------------------------------------------------------------------------
+.SUFFIXES:
+#---------------------------------------------------------------------------------
+
+ifeq ($(strip $(DEVKITPRO)),)
+$(error "Please set DEVKITPRO in your environment. export DEVKITPRO=<path to>/devkitpro")
+endif
+
+TOPDIR ?= $(CURDIR)
+include $(DEVKITPRO)/libnx/switch_rules
+
+#---------------------------------------------------------------------------------
+# TARGET is the name of the output
+# BUILD is the directory where object files & intermediate files will be placed
+# SOURCES is a list of directories containing source code
+# DATA is a list of directories containing data files
+# INCLUDES is a list of directories containing header files
+# EXEFS_SRC is the optional input directory containing data copied into exefs, if anything this normally should only contain "main.npdm".
+#---------------------------------------------------------------------------------
+TARGET		:=	$(notdir $(CURDIR))
+BUILD		:=	build
+SOURCES		:=	source
+DATA		:=	data
+INCLUDES	:=	include ../../common/include
+EXEFS_SRC	:=	exefs_src
+
+DEFINES	:=	-DDISABLE_IPC
+
+#---------------------------------------------------------------------------------
+# options for code generation
+#---------------------------------------------------------------------------------
+ARCH	:=	-march=armv8-a -mtune=cortex-a57 -mtp=soft -fPIE
+
+CFLAGS	:=	-g -Wall -O2 -ffunction-sections \
+			$(ARCH) $(DEFINES)
+
+CFLAGS	+=	$(INCLUDE) -D__SWITCH__
+
+CXXFLAGS	:= $(CFLAGS) -fno-rtti -fno-exceptions -std=gnu++17
+
+ASFLAGS	:=	-g $(ARCH)
+LDFLAGS	=	-specs=$(DEVKITPRO)/libnx/switch.specs -g $(ARCH) -Wl,-Map,$(notdir $*.map)
+
+LIBS	:= -lstratosphere -lnx
+
+#---------------------------------------------------------------------------------
+# list of directories containing libraries, this must be the top level containing
+# include and lib
+#---------------------------------------------------------------------------------
+LIBDIRS	:= $(PORTLIBS) $(LIBNX) $(CURDIR)/../libstratosphere
+
+
+#---------------------------------------------------------------------------------
+# no real need to edit anything past this point unless you need to add additional
+# rules for different file extensions
+#---------------------------------------------------------------------------------
+ifneq ($(BUILD),$(notdir $(CURDIR)))
+#---------------------------------------------------------------------------------
+
+export OUTPUT	:=	$(CURDIR)/$(TARGET)
+export TOPDIR	:=	$(CURDIR)
+
+export VPATH	:=	$(foreach dir,$(SOURCES),$(CURDIR)/$(dir)) \
+			$(foreach dir,$(DATA),$(CURDIR)/$(dir))
+
+export DEPSDIR	:=	$(CURDIR)/$(BUILD)
+
+CFILES		:=	$(foreach dir,$(SOURCES),$(notdir $(wildcard $(dir)/*.c)))
+CPPFILES	:=	$(foreach dir,$(SOURCES),$(notdir $(wildcard $(dir)/*.cpp)))
+SFILES		:=	$(foreach dir,$(SOURCES),$(notdir $(wildcard $(dir)/*.s)))
+BINFILES	:=	$(foreach dir,$(DATA),$(notdir $(wildcard $(dir)/*.*)))
+
+#---------------------------------------------------------------------------------
+# use CXX for linking C++ projects, CC for standard C
+#---------------------------------------------------------------------------------
+ifeq ($(strip $(CPPFILES)),)
+#---------------------------------------------------------------------------------
+	export LD	:=	$(CC)
+#---------------------------------------------------------------------------------
+else
+#---------------------------------------------------------------------------------
+	export LD	:=	$(CXX)
+#---------------------------------------------------------------------------------
+endif
+#---------------------------------------------------------------------------------
+
+export OFILES	:=	$(addsuffix .o,$(BINFILES)) \
+			$(CPPFILES:.cpp=.o) $(CFILES:.c=.o) $(SFILES:.s=.o)
+
+export INCLUDE	:=	$(foreach dir,$(INCLUDES),-I$(CURDIR)/$(dir)) \
+			$(foreach dir,$(LIBDIRS),-I$(dir)/include) \
+			-I$(CURDIR)/$(BUILD)
+
+export LIBPATHS	:=	$(foreach dir,$(LIBDIRS),-L$(dir)/lib)
+
+export BUILD_EXEFS_SRC := $(TOPDIR)/$(EXEFS_SRC)
+
+ifeq ($(strip $(CONFIG_JSON)),)
+	jsons := $(wildcard *.json)
+	ifneq (,$(findstring $(TARGET).json,$(jsons)))
+		export APP_JSON := $(TOPDIR)/$(TARGET).json
+	else
+		ifneq (,$(findstring config.json,$(jsons)))
+			export APP_JSON := $(TOPDIR)/config.json
+		endif
+	endif
+else
+	export APP_JSON := $(TOPDIR)/$(CONFIG_JSON)
+endif
+
+.PHONY: $(BUILD) clean all
+
+#---------------------------------------------------------------------------------
+all: $(BUILD)
+
+$(BUILD):
+	@[ -d $@ ] || mkdir -p $@
+	@$(MAKE) --no-print-directory -C $(BUILD) -f $(CURDIR)/Makefile
+
+#---------------------------------------------------------------------------------
+clean:
+	@echo clean ...
+	@rm -fr $(BUILD) $(TARGET).nsp $(TARGET).npdm $(TARGET).nso $(TARGET).elf
+
+
+#---------------------------------------------------------------------------------
+else
+.PHONY:	all
+
+DEPENDS	:=	$(OFILES:.o=.d)
+
+#---------------------------------------------------------------------------------
+# main targets
+#---------------------------------------------------------------------------------
+all	:	$(OUTPUT).nsp
+
+ifeq ($(strip $(APP_JSON)),)
+$(OUTPUT).nsp	:	$(OUTPUT).nso
+else
+$(OUTPUT).nsp	:	$(OUTPUT).nso $(OUTPUT).npdm
+endif
+
+$(OUTPUT).nso	:	$(OUTPUT).elf
+
+$(OUTPUT).elf	:	$(OFILES)
+
+#---------------------------------------------------------------------------------
+# you need a rule like this for each extension you use as binary data
+#---------------------------------------------------------------------------------
+%.bin.o	:	%.bin
+#---------------------------------------------------------------------------------
+	@echo $(notdir $<)
+	@$(bin2o)
+
+-include $(DEPENDS)
+
+#---------------------------------------------------------------------------------------
+endif
+#---------------------------------------------------------------------------------------

stratosphere/fatal/fatal.json

@@ -0,0 +1,87 @@
+{
+	"name":	"fatal",
+	"title_id":	"0x0100000000000034",
+	"title_id_range_min":	"0x0100000000000034",
+	"title_id_range_max":	"0x0100000000000034",
+	"main_thread_stack_size":	"0x00010000",
+	"main_thread_priority":	15,
+	"default_cpu_id":	3,
+	"process_category":	0,
+	"is_retail":	true,
+	"pool_partition":	2,
+	"is_64_bit":	true,
+	"address_space_type":	3,
+	"filesystem_access":	{
+		"permissions":	"0x0000000000100000"
+	},
+	"service_access":	["bpc", "erpt:c", "fsp-srv", "gpio", "i2c", "lbl", "lm", "nvdrv:s", "pcv", "pl:u", "pm:info", "psm", "set", "set:sys", "spsm", "vi:m", "vi:s"],
+	"service_host":	["fatal:p", "fatal:u"],
+	"kernel_capabilities":	[{
+			"type":	"kernel_flags",
+			"value":	{
+				"highest_thread_priority":	63,
+				"lowest_thread_priority":	12,
+				"lowest_cpu_id":	0,
+				"highest_cpu_id":	3
+			}
+		}, {
+			"type":	"syscalls",
+			"value":	{
+				"svcSetHeapSize":	"0x01",
+				"svcSetMemoryPermission":	"0x02",
+				"svcSetMemoryAttribute":	"0x03",
+				"svcMapMemory":	"0x04",
+				"svcUnmapMemory":	"0x05",
+				"svcQueryMemory":	"0x06",
+				"svcExitProcess":	"0x07",
+				"svcCreateThread":	"0x08",
+				"svcStartThread":	"0x09",
+				"svcExitThread":	"0x0a",
+				"svcSleepThread":	"0x0b",
+				"svcGetThreadPriority":	"0x0c",
+				"svcSetThreadPriority":	"0x0d",
+				"svcGetThreadCoreMask":	"0x0e",
+				"svcSetThreadCoreMask":	"0x0f",
+				"svcGetCurrentProcessorNumber":	"0x10",
+				"svcSignalEvent":	"0x11",
+				"svcClearEvent":	"0x12",
+				"svcMapSharedMemory":	"0x13",
+				"svcUnmapSharedMemory":	"0x14",
+				"svcCreateTransferMemory":	"0x15",
+				"svcCloseHandle":	"0x16",
+				"svcResetSignal":	"0x17",
+				"svcWaitSynchronization":	"0x18",
+				"svcCancelSynchronization":	"0x19",
+				"svcArbitrateLock":	"0x1a",
+				"svcArbitrateUnlock":	"0x1b",
+				"svcWaitProcessWideKeyAtomic":	"0x1c",
+				"svcSignalProcessWideKey":	"0x1d",
+				"svcGetSystemTick":	"0x1e",
+				"svcConnectToNamedPort":	"0x1f",
+				"svcSendSyncRequestLight":	"0x20",
+				"svcSendSyncRequest":	"0x21",
+				"svcSendSyncRequestWithUserBuffer":	"0x22",
+				"svcSendAsyncRequestWithUserBuffer":	"0x23",
+				"svcGetProcessId":	"0x24",
+				"svcGetThreadId":	"0x25",
+				"svcBreak":	"0x26",
+				"svcOutputDebugString":	"0x27",
+				"svcReturnFromException":	"0x28",
+				"svcGetInfo":	"0x29",
+				"svcWaitForAddress":	"0x34",
+				"svcSignalToAddress":	"0x35",
+				"svcCreateSession":	"0x40",
+				"svcAcceptSession":	"0x41",
+				"svcReplyAndReceiveLight":	"0x42",
+				"svcReplyAndReceive":	"0x43",
+				"svcReplyAndReceiveWithUserBuffer":	"0x44",
+				"svcCreateEvent":	"0x45"
+			}
+		}, {
+			"type":	"min_kernel_version",
+			"value":	"0x0060"
+		}, {
+			"type":	"handle_table_size",
+			"value":	128
+		}]
+}

stratosphere/fatal/source/fatal_event_manager.cpp

@@ -0,0 +1,45 @@
+/*
+ * 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_event_manager.hpp"
+
+FatalEventManager::FatalEventManager() {
+    /* Just create all the events. */
+    for (size_t i = 0; i < FatalEventManager::NumFatalEvents; i++) {
+        if (R_FAILED(eventCreate(&this->events[i], true))) {
+            std::abort();
+        }
+    }
+}
+
+Result FatalEventManager::GetEvent(Handle *out) {
+    std::scoped_lock<HosMutex> lk{this->lock};
+    
+    /* Only allow GetEvent to succeed NumFatalEvents times. */
+    if (this->events_gotten >= FatalEventManager::NumFatalEvents) {
+        return 0x8A3;
+    }
+    
+    *out = this->events[this->events_gotten++].revent;
+    return 0;
+}
+
+void FatalEventManager::SignalEvents() {
+    for (size_t i = 0; i < FatalEventManager::NumFatalEvents; i++) {
+        eventFire(&this->events[i]);
+    }
+}

stratosphere/fatal/source/fatal_event_manager.hpp

@@ -0,0 +1,32 @@
+/*
+ * 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>
+
+class FatalEventManager {
+    private:
+        static constexpr size_t NumFatalEvents = 3;
+        
+        HosMutex lock;
+        size_t events_gotten = 0;
+        Event events[3];
+    public:
+        FatalEventManager();
+        Result GetEvent(Handle *out);
+        void SignalEvents();
+};

stratosphere/fatal/source/fatal_main.cpp

@@ -0,0 +1,97 @@
+/*
+ * 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 <cstdlib>
+#include <cstdint>
+#include <cstring>
+#include <malloc.h>
+
+#include <switch.h>
+#include <atmosphere.h>
+#include <stratosphere.hpp>
+
+#include "fatal_types.hpp"
+#include "fatal_private.hpp"
+#include "fatal_user.hpp"
+
+extern "C" {
+    extern u32 __start__;
+
+    u32 __nx_applet_type = AppletType_None;
+
+    #define INNER_HEAP_SIZE 0x20000
+    size_t nx_inner_heap_size = INNER_HEAP_SIZE;
+    char   nx_inner_heap[INNER_HEAP_SIZE];
+    
+    void __libnx_initheap(void);
+    void __appInit(void);
+    void __appExit(void);
+}
+
+
+void __libnx_initheap(void) {
+	void*  addr = nx_inner_heap;
+	size_t size = nx_inner_heap_size;
+
+	/* Newlib */
+	extern char* fake_heap_start;
+	extern char* fake_heap_end;
+
+	fake_heap_start = (char*)addr;
+	fake_heap_end   = (char*)addr + size;
+}
+
+void __appInit(void) {
+    Result rc;
+    
+    rc = smInitialize();
+    if (R_FAILED(rc)) {
+        fatalSimple(MAKERESULT(Module_Libnx, LibnxError_InitFail_SM));
+    }
+    
+    rc = setsysInitialize();
+    if (R_FAILED(rc)) {
+        fatalSimple(rc);
+    }
+    
+    CheckAtmosphereVersion(CURRENT_ATMOSPHERE_VERSION);
+}
+
+void __appExit(void) {
+    /* Cleanup services. */
+    setsysExit();
+    smExit();
+}
+
+int main(int argc, char **argv)
+{
+    consoleDebugInit(debugDevice_SVC);
+    
+    /* TODO: What's a good timeout value to use here? */
+    auto server_manager = new WaitableManager(1);
+   
+    /* TODO: Create services. */
+    server_manager->AddWaitable(new ServiceServer<PrivateService>("fatal:p", 4));
+    server_manager->AddWaitable(new ServiceServer<UserService>("fatal:u", 4));
+
+    /* Loop forever, servicing our services. */
+    server_manager->Process();
+    
+    delete server_manager;
+
+    return 0;
+}
+

stratosphere/fatal/source/fatal_private.cpp

@@ -0,0 +1,25 @@
+/*
+ * 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_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());
+}

stratosphere/fatal/source/fatal_private.hpp

@@ -0,0 +1,33 @@
+/*
+ * 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>
+
+enum PrivateCmd {
+    Private_Cmd_GetFatalEvent = 0,
+};
+
+class PrivateService final : public IServiceObject {
+    private:
+        /* Actual commands. */
+        Result GetFatalEvent(Out<CopiedHandle> out_h);
+    public:
+        DEFINE_SERVICE_DISPATCH_TABLE {
+            MakeServiceCommandMeta<Private_Cmd_GetFatalEvent, &PrivateService::GetFatalEvent>(),
+        };
+};

stratosphere/fatal/source/fatal_types.hpp

@@ -0,0 +1,97 @@
+/*
+ * 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>
+
+enum FatalResult : Result {
+    FatalResult_TooManyEvents = 0x8A3,
+    FatalResult_InRepairWithoutVolHeld = 0xAA3,
+    FatalResult_InRepairWithoutTimeReviserCartridge = 0xCA3,
+};
+
+struct Aarch64CpuContext {
+    using RegisterType = u64;
+    static constexpr size_t MaxStackTraceDepth = 0x20;
+    
+    /* Registers, exception context. N left names for these fields in fatal .rodata. */
+    union {
+        RegisterType x[31];
+        struct {
+            RegisterType _x[29];
+            RegisterType fp;
+            RegisterType lr;
+            RegisterType sp;
+            RegisterType pc;
+        };
+    };
+    RegisterType pstate;
+    RegisterType afsr0;
+    RegisterType afsr1;
+    RegisterType esr;
+    RegisterType far;
+    
+    /* Misc. */
+    RegisterType stack_trace[MaxStackTraceDepth];
+    RegisterType start_address;
+    RegisterType register_set_flags;
+    u32 stack_trace_size;
+};
+
+struct Aarch32CpuContext {
+    using RegisterType = u32;
+    static constexpr size_t MaxStackTraceDepth = 0x20;
+    
+    /* Registers, exception context. N left names for these fields in fatal .rodata. */
+    union {
+        RegisterType r[16];
+        struct {
+            RegisterType _x[11];
+            RegisterType fp;
+            RegisterType ip;
+            RegisterType sp;
+            RegisterType lr;
+            RegisterType pc;
+        };
+    };
+    RegisterType pstate;
+    RegisterType afsr0;
+    RegisterType afsr1;
+    RegisterType esr;
+    RegisterType far;
+    
+    /* Misc. Yes, stack_trace_size is really laid out differently than aarch64... */
+    RegisterType stack_trace[MaxStackTraceDepth];
+    u32 stack_trace_size;
+    RegisterType start_address;
+    RegisterType register_set_flags;
+};
+
+struct FatalCpuContext {
+    union {
+        Aarch64CpuContext aarch64_ctx;
+        Aarch64CpuContext aarch32_ctx;
+    };
+    
+    bool is_aarch32;
+    u32 type;
+};
+
+static_assert(sizeof(Aarch64CpuContext) == 0x248, "Aarch64CpuContext definition!");
+static_assert(sizeof(Aarch32CpuContext) == 0xE0, "Aarch32CpuContext definition!");
+static_assert(sizeof(FatalCpuContext) == 0x250, "FatalCpuContext definition!");
+static_assert(std::is_pod_v<FatalCpuContext>, "FatalCpuContext definition!");

stratosphere/fatal/source/fatal_user.cpp

@@ -0,0 +1,43 @@
+/*
+ * 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_user.hpp"
+
+Result UserService::ThrowFatalImpl(u32 error, u64 pid, FatalType policy, FatalCpuContext *context) {
+    /* TODO */
+    return 0;
+}
+
+
+Result UserService::ThrowFatal(u32 error, PidDescriptor pid_desc) {
+    FatalCpuContext ctx = {0};
+    return ThrowFatalImpl(error, pid_desc.pid, FatalType_ErrorReportAndErrorScreen, &ctx);
+}
+
+Result UserService::ThrowFatalWithPolicy(u32 error, PidDescriptor pid_desc, FatalType policy) {
+    FatalCpuContext ctx = {0};
+    return ThrowFatalImpl(error, pid_desc.pid, policy, &ctx);
+}
+
+Result UserService::ThrowFatalWithCpuContext(u32 error, PidDescriptor pid_desc, FatalType policy, InBuffer<FatalCpuContext> _ctx) {
+    /* Require exactly one context passed in. */
+    if (_ctx.num_elements != 1) {
+        return 0xF601;
+    }
+    
+    return ThrowFatalImpl(error, pid_desc.pid, policy, _ctx.buffer);
+}

stratosphere/fatal/source/fatal_user.hpp

@@ -0,0 +1,43 @@
+/*
+ * 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"
+
+enum UserCmd {
+    User_Cmd_ThrowFatal = 0,
+    User_Cmd_ThrowFatalWithPolicy = 1,
+    User_Cmd_ThrowFatalWithCpuContext = 2,
+};
+
+class UserService final : public IServiceObject {
+    private:
+        Result ThrowFatalImpl(u32 error, u64 pid, FatalType policy, FatalCpuContext *context);
+    
+        /* Actual commands. */
+        Result ThrowFatal(u32 error, PidDescriptor pid_desc);
+        Result ThrowFatalWithPolicy(u32 error, PidDescriptor pid_desc, FatalType policy);
+        Result ThrowFatalWithCpuContext(u32 error, PidDescriptor pid_desc, FatalType policy, InBuffer<FatalCpuContext> _ctx);
+    public:
+        DEFINE_SERVICE_DISPATCH_TABLE {
+            MakeServiceCommandMeta<User_Cmd_ThrowFatal, &UserService::ThrowFatal>(),
+            MakeServiceCommandMeta<User_Cmd_ThrowFatalWithPolicy, &UserService::ThrowFatalWithPolicy>(),
+            MakeServiceCommandMeta<User_Cmd_ThrowFatalWithCpuContext, &UserService::ThrowFatalWithCpuContext>(),
+        };
+};