initial release commit

README.md

@@ -1,9 +1,52 @@
-# exlaunch
+# dread depackager
+A modification for Metroid: Dread allowing redirection of files from within pkg files to loose files in RomFS.
+
+# usage
+dread deapackager expects a json file called "replacements.json" to be placed into the root of the RomFS directory for your mod, and the subsdk9 and main.npdm files in the exefs directory.
+
+replacements.json can have two structures, and it will be automatically detected.
+
+format 1 example:
+```json
+{
+	"replacements" :
+	[
+		"file1/path/within/pkg",
+		"file2/path/within/pkg"
+	]
+}
+```
+
+with format 1, `file1/path/within/pkg` will be directed to `rom:/file1/path/within/pkg` when the game tries to open it from within a pkg, and instead will open it from the same path within RomFS.
+
+format 2 example:
+```json
+{
+	"replacements" :
+	[
+		{ "file1/path/within/pkg" : "rom:/mymod/file1" },
+		{ "file2/path/within/pkg" : "rom:/mymod/file2" }
+	]
+}
+```
+
+with format 2, the RomFS path is arbitrarily defined for any pkg file path, allowing for more flexible organization of the reaplced files in the finished mod
+
+# How it works
+Dread depackager uses the filepaths listed in replacements.json to selectively replace paths in the game's path to crc conversion code. 
+All file paths first pass through this function, and by hooking it and replacing the string, it can selectively redirect file paths into romfs
+
+dread depackager uses a few libraries:
+ - exlaunch, a code injection framework for switch executables. Its original readme can be found below 
+ - cJSON, a json parsing library written in C. Dread depackager uses a slightly modified version of this library.
+
+# Original exlaunch readme 
+## exlaunch
 A framework for injecting C/C++ code into Nintendo Switch applications/applet/sysmodules.
 
-# Note
+## Note
 This project is a work in progress. If you have issues, reach out to Shadów#1337 on Discord.
 
-# Credit
+## Credit
 - Atmosphère: A great reference and guide.
 - oss-rtld: Included for (pending) interop with rtld in applications (License [here](https://github.com/shadowninja108/exlaunch/blob/main/source/lib/reloc/rtld/LICENSE.txt)).

exlaunch.json

@@ -1,6 +1,6 @@
 {
-	"name":	"Application",
-	"title_id":	"0x0100801011c3e000",
+	"name":	"GameApp",
+	"title_id":	"0x010093801237c000",
 	"title_id_range_min":	"0x0100000000010000",
 	"title_id_range_max":	"0x01ffffffffffffff",
 	"main_thread_stack_size":	"0x00100000",

exlaunch.sh

@@ -7,7 +7,7 @@
 # How you're loading your module. Used to determine how to find the target module. (AsRtld/Module/Kip)
 export LOAD_KIND="Module"
 # Program you're targetting. Used to determine where to deploy your files.
-export PROGRAM_ID="0100801011c3e000"
+export PROGRAM_ID="010093801237c000"
 # Optional path to copy the final ELF to, for convenience.
 export ELF_EXTRACT=""
 # Python command to use. Must be Python 3.4+.

misc/mk/common.mk

@@ -49,7 +49,7 @@ CFLAGS	+= $(EXL_CFLAGS) -I"$(DEVKITPRO)/libnx/include" -I$(ROOT_SOURCE) $(addpre
 CXXFLAGS	:= $(CFLAGS) -fno-rtti -fno-exceptions -fno-asynchronous-unwind-tables -fno-unwind-tables -std=gnu++20 
 
 ASFLAGS	:=	-g $(ARCH)
-LDFLAGS	:=  -specs=$(SPECS_PATH)/$(SPECS_NAME) -g $(ARCH) -Wl,-Map,$(notdir $*.map) -nostartfiles -nostdlib
+LDFLAGS	:=  -specs=$(SPECS_PATH)/$(SPECS_NAME) -g $(ARCH) -Wl,-Map,$(notdir $*.map) -nostartfiles -flto
 
 LIBS	:=
 

source/nn/fs/fs_files.hpp

@@ -83,5 +83,5 @@ namespace nn::fs {
         Flush file.
         handle: Handle representing file to flush. 
     */
-   Result FlushFile(FileHandle handle);
+    Result FlushFile(FileHandle handle);
 }

source/nn/fs/fs_mount.hpp

@@ -9,4 +9,5 @@ namespace nn::fs {
         mount: drive to mount to.
     */
     Result MountSdCardForDebug(char const* mount);
+    Result MountRom(char const*, void*, unsigned long);
 };