troposphere: add reboot_to_payload example homebrew

Makefile

@@ -6,7 +6,7 @@ ifneq (, $(strip $(shell git status --porcelain 2>/dev/null)))
     AMSREV := $(AMSREV)-dirty
 endif
 
-all: fusee stratosphere exosphere thermosphere
+all: fusee stratosphere exosphere thermosphere troposphere
 
 thermosphere:
 	$(MAKE) -C thermosphere all
@@ -17,6 +17,9 @@ exosphere: thermosphere
 stratosphere: exosphere
 	$(MAKE) -C stratosphere all
 
+troposphere: stratosphere
+	$(MAKE) -C troposphere all
+
 fusee: exosphere stratosphere
 	$(MAKE) -C $@ all
 
@@ -39,6 +42,7 @@ dist: all
 	rm -rf out
 	mkdir atmosphere-$(AMSVER)
 	mkdir atmosphere-$(AMSVER)/atmosphere
+	mkdir atmosphere-$(AMSVER)/switch
 	mkdir -p atmosphere-$(AMSVER)/atmosphere/titles/0100000000000036
 	mkdir -p atmosphere-$(AMSVER)/atmosphere/titles/0100000000000034
 	mkdir -p atmosphere-$(AMSVER)/atmosphere/titles/0100000000000032
@@ -51,6 +55,7 @@ dist: all
 	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-$(AMSVER)/atmosphere/titles/0100000000000032/exefs.nsp
+	cp troposphere/reboot_to_payload/reboot_to_payload.nro atmosphere-$(AMSVER)/switch/reboot_to_payload.nro
 	mkdir -p atmosphere-$(AMSVER)/atmosphere/titles/0100000000000032/flags
 	touch atmosphere-$(AMSVER)/atmosphere/titles/0100000000000032/flags/boot2.flag
 	cd atmosphere-$(AMSVER); zip -r ../atmosphere-$(AMSVER).zip ./*; cd ../;

troposphere/Makefile

@@ -0,0 +1,12 @@
+APPLICATIONS := reboot_to_payload
+
+SUBFOLDERS := $(APPLICATIONS)
+
+TOPTARGETS := all clean
+
+$(TOPTARGETS): $(SUBFOLDERS)
+
+$(SUBFOLDERS):
+	$(MAKE) -C $@ $(MAKECMDGOALS)
+
+.PHONY: $(TOPTARGETS) $(SUBFOLDERS)

troposphere/reboot_to_payload/Makefile

@@ -0,0 +1,192 @@
+#---------------------------------------------------------------------------------
+.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".
+# ROMFS is the directory containing data to be added to RomFS, relative to the Makefile (Optional)
+#
+# NO_ICON: if set to anything, do not use icon.
+# NO_NACP: if set to anything, no .nacp file is generated.
+# APP_TITLE is the name of the app stored in the .nacp file (Optional)
+# APP_AUTHOR is the author of the app stored in the .nacp file (Optional)
+# APP_VERSION is the version of the app stored in the .nacp file (Optional)
+# APP_TITLEID is the titleID of the app stored in the .nacp file (Optional)
+# ICON is the filename of the icon (.jpg), relative to the project folder.
+#   If not set, it attempts to use one of the following (in this order):
+#     - <Project name>.jpg
+#     - icon.jpg
+#     - <libnx folder>/default_icon.jpg
+#---------------------------------------------------------------------------------
+TARGET		:=	$(notdir $(CURDIR))
+BUILD		:=	build
+SOURCES		:=	source
+DATA		:=	data
+INCLUDES	:=	include
+EXEFS_SRC	:=	exefs_src
+APP_TITLE	:=	Reboot to Payload
+APP_AUTHOR	:=	Atmosphère-NX
+APP_VERSION	:=	1.0.0
+#ROMFS	:=	romfs
+
+#---------------------------------------------------------------------------------
+# 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
+
+ASFLAGS	:=	-g $(ARCH)
+LDFLAGS	=	-specs=$(DEVKITPRO)/libnx/switch.specs -g $(ARCH) -Wl,-Map,$(notdir $*.map)
+
+LIBS	:= -lnx
+
+#---------------------------------------------------------------------------------
+# list of directories containing libraries, this must be the top level containing
+# include and lib
+#---------------------------------------------------------------------------------
+LIBDIRS	:= $(PORTLIBS) $(LIBNX)
+
+
+#---------------------------------------------------------------------------------
+# no real need to edit anything past this point unless you need to add additional
+# rules for different file extensions
+#---------------------------------------------------------------------------------
+ifneq ($(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_BIN	:=	$(addsuffix .o,$(BINFILES))
+export OFILES_SRC	:=	$(CPPFILES:.cpp=.o) $(CFILES:.c=.o) $(SFILES:.s=.o)
+export OFILES 	:=	$(OFILES_BIN) $(OFILES_SRC)
+export HFILES_BIN	:=	$(addsuffix .h,$(subst .,_,$(BINFILES)))
+
+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 $(ICON)),)
+	icons := $(wildcard *.jpg)
+	ifneq (,$(findstring $(TARGET).jpg,$(icons)))
+		export APP_ICON := $(TOPDIR)/$(TARGET).jpg
+	else
+		ifneq (,$(findstring icon.jpg,$(icons)))
+			export APP_ICON := $(TOPDIR)/icon.jpg
+		endif
+	endif
+else
+	export APP_ICON := $(TOPDIR)/$(ICON)
+endif
+
+ifeq ($(strip $(NO_ICON)),)
+	export NROFLAGS += --icon=$(APP_ICON)
+endif
+
+ifeq ($(strip $(NO_NACP)),)
+	export NROFLAGS += --nacp=$(CURDIR)/$(TARGET).nacp
+endif
+
+ifneq ($(APP_TITLEID),)
+	export NACPFLAGS += --titleid=$(APP_TITLEID)
+endif
+
+ifneq ($(ROMFS),)
+	export NROFLAGS += --romfsdir=$(CURDIR)/$(ROMFS)
+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).pfs0 $(TARGET).nso $(TARGET).nro $(TARGET).nacp $(TARGET).elf
+
+
+#---------------------------------------------------------------------------------
+else
+.PHONY:	all
+
+DEPENDS	:=	$(OFILES:.o=.d)
+
+#---------------------------------------------------------------------------------
+# main targets
+#---------------------------------------------------------------------------------
+all	:	$(OUTPUT).nro
+
+ifeq ($(strip $(NO_NACP)),)
+$(OUTPUT).nro	:	$(OUTPUT).elf $(OUTPUT).nacp
+else
+$(OUTPUT).nro	:	$(OUTPUT).elf
+endif
+
+$(OUTPUT).elf	:	$(OFILES)
+
+$(OFILES_SRC)	: $(HFILES_BIN)
+
+#---------------------------------------------------------------------------------
+# you need a rule like this for each extension you use as binary data
+#---------------------------------------------------------------------------------
+%.bin.o	%_bin.h :	%.bin
+#---------------------------------------------------------------------------------
+	@echo $(notdir $<)
+	@$(bin2o)
+
+-include $(DEPENDS)
+
+#---------------------------------------------------------------------------------------
+endif
+#---------------------------------------------------------------------------------------

troposphere/reboot_to_payload/source/main.c

@@ -0,0 +1,103 @@
+#include <string.h>
+#include <stdio.h>
+#include <stdbool.h>
+
+#include <switch.h>
+
+#define IRAM_PAYLOAD_MAX_SIZE 0x2F000
+#define IRAM_PAYLOAD_BASE 0x40010000
+
+static u8 g_reboot_payload[IRAM_PAYLOAD_MAX_SIZE] __attribute__ ((aligned (0x1000)));
+static u8 g_ff_page[0x1000] __attribute__ ((aligned (0x1000)));
+static u8 g_work_page[0x1000] __attribute__ ((aligned (0x1000)));
+
+void do_iram_dram_copy(void *buf, uintptr_t iram_addr, size_t size, int option) {
+    memcpy(g_work_page, buf, size);
+    
+    SecmonArgs args = {0};
+    args.X[0] = 0xF0000201;             /* smcAmsIramCopy */
+    args.X[1] = (uintptr_t)g_work_page;  /* DRAM Address */
+    args.X[2] = iram_addr;              /* IRAM Address */
+    args.X[3] = size;                   /* Copy size */
+    args.X[4] = option;                 /* 0 = Read, 1 = Write */
+    svcCallSecureMonitor(&args);
+    
+    memcpy(buf, g_work_page, size);
+}
+
+void copy_to_iram(uintptr_t iram_addr, void *buf, size_t size) {
+    do_iram_dram_copy(buf, iram_addr, size, 1);
+}
+
+void copy_from_iram(void *buf, uintptr_t iram_addr, size_t size) {
+    do_iram_dram_copy(buf, iram_addr, size, 0);
+}
+
+static void clear_iram(void) {
+    memset(g_ff_page, 0xFF, sizeof(g_ff_page));
+    for (size_t i = 0; i < IRAM_PAYLOAD_MAX_SIZE; i += sizeof(g_ff_page)) {
+        copy_to_iram(IRAM_PAYLOAD_BASE + i, g_ff_page, sizeof(g_ff_page));
+    }
+}
+
+static void reboot_to_payload(void) {
+    clear_iram();
+    
+    for (size_t i = 0; i < IRAM_PAYLOAD_MAX_SIZE; i += 0x1000) {
+        copy_to_iram(IRAM_PAYLOAD_BASE + i, &g_reboot_payload[i], 0x1000);
+    }
+    
+    splSetConfig((SplConfigItem)65001, 2);
+}
+
+int main(int argc, char **argv)
+{
+    gfxInitDefault();
+    fsdevMountSdmc();
+    consoleInit(NULL);
+    
+    bool can_reboot = true;
+    Result rc = splInitialize();
+    if (R_FAILED(rc)) {
+        printf("Failed to initialize spl: 0x%x\n", rc);
+        can_reboot = false;
+    } else {
+        FILE *f = fopen("sdmc:/atmosphere/reboot_payload.bin", "rb");
+        if (f == NULL) {
+            printf("Failed to open atmosphere/reboot_payload.bin!\n");
+            can_reboot = false;
+        } else {
+            fread(g_reboot_payload, 1, sizeof(g_reboot_payload), f);
+            fclose(f);
+            printf("Press [-] to reboot to payload\n");
+        }
+    }
+        
+    printf("Press [L] to exit\n");
+
+    // Main loop
+    while(appletMainLoop())
+    {
+        //Scan all the inputs. This should be done once for each frame
+        hidScanInput();
+
+        //hidKeysDown returns information about which buttons have been just pressed (and they weren't in the previous frame)
+        u64 kDown = hidKeysDown(CONTROLLER_P1_AUTO);
+
+        if (can_reboot && kDown & KEY_MINUS) {
+            reboot_to_payload();
+        }
+        if (kDown & KEY_L)  { break; } // break in order to return to hbmenu 
+
+        gfxFlushBuffers();
+        gfxSwapBuffers();
+    }
+
+    if (can_reboot) {
+        splExit();
+    }
+    fsdevUnmountAll();
+    gfxExit();
+    return 0;
+}
+