M src/gba/gba.c → src/gba/gba.c

@@ -38,6 +38,12 @@
 static bool _setSoftwareBreakpoint(struct ARMDebugger*, uint32_t address, enum ExecutionMode mode, uint32_t* opcode);
 static bool _clearSoftwareBreakpoint(struct ARMDebugger*, uint32_t address, enum ExecutionMode mode, uint32_t opcode);
 
+
+#ifdef _3DS
+extern uint32_t* romBuffer;
+extern size_t romBufferSize;
+#endif
+
 void GBACreate(struct GBA* gba) {
 	gba->d.id = GBA_COMPONENT_MAGIC;
 	gba->d.init = GBAInit;
@@ -110,7 +116,9 @@ }
 	gba->memory.rom = 0;
 
 	if (gba->romVf) {
+#ifndef _3DS
 		gba->romVf->unmap(gba->romVf, gba->pristineRom, gba->pristineRomSize);
+#endif
 		gba->pristineRom = 0;
 		gba->romVf = 0;
 	}
@@ -396,7 +404,15 @@ vf->seek(vf, 0, SEEK_SET);
 	if (gba->pristineRomSize > SIZE_CART0) {
 		gba->pristineRomSize = SIZE_CART0;
 	}
+#ifdef _3DS
+	gba->pristineRom = 0;
+	if (gba->pristineRomSize <= romBufferSize) {
+		gba->pristineRom = romBuffer;
+		vf->read(vf, romBuffer, gba->pristineRomSize);
+	}
+#else
 	gba->pristineRom = vf->map(vf, gba->pristineRomSize, MAP_READ);
+#endif
 	if (!gba->pristineRom) {
 		GBALog(gba, GBA_LOG_WARN, "Couldn't map ROM");
 		return false;

A src/platform/3ds/ctru-heap.c

@@ -0,0 +1,89 @@
+/* This code is mostly from ctrulib, which contains the following license:
+
+	This software is provided 'as-is', without any express or implied
+	warranty. In no event will the authors be held liable for any damages
+	arising from the use of this software.
+
+	Permission is granted to anyone to use this software for any purpose,
+	including commercial applications, and to alter it and redistribute it
+	freely, subject to the following restrictions:
+
+	* The origin of this software must not be misrepresented; you must not
+	  claim that you wrote the original software. If you use this software in
+	  a product, an acknowledgment in the product documentation would be
+	  appreciated but is not required.
+
+	* Altered source versions must be plainly marked as such, and must not be
+	  misrepresented as being the original software.
+
+	* This notice may not be removed or altered from any source distribution.
+*/
+
+#include <3ds/types.h>
+#include <3ds/svc.h>
+
+extern char* fake_heap_start;
+extern char* fake_heap_end;
+u32 __linear_heap;
+u32 __heapBase;
+static u32 __heap_size = 0x03000000;
+static u32 __linear_heap_size = 0x00800000;
+
+extern void (*__system_retAddr)(void);
+
+void __destroy_handle_list(void);
+void __appExit();
+
+void __libc_fini_array(void);
+
+uint32_t* romBuffer;
+size_t romBufferSize;
+
+bool allocateRomBuffer(void) {
+	romBuffer = malloc(0x02000000);
+	if (romBuffer) {
+		romBufferSize = 0x02000000;
+		return true;
+	}
+	romBuffer = malloc(0x01000000);
+	if (romBuffer) {
+		romBufferSize = 0x01000000;
+		return true;
+	}
+	return false;
+}
+
+void __system_allocateHeaps() {
+	u32 tmp=0;
+
+	// Allocate the application heap
+	__heapBase = 0x08000000;
+	svcControlMemory(&tmp, __heapBase, 0x0, __heap_size, MEMOP_ALLOC, MEMPERM_READ | MEMPERM_WRITE);
+
+	// Allocate the linear heap
+	svcControlMemory(&__linear_heap, 0x0, 0x0, __linear_heap_size, MEMOP_ALLOC_LINEAR, MEMPERM_READ | MEMPERM_WRITE);
+	// Set up newlib heap
+	fake_heap_start = (char*)__heapBase;
+	fake_heap_end = fake_heap_start + __heap_size;
+}
+
+void __attribute__((noreturn)) __libctru_exit(int rc)
+{
+	u32 tmp=0;
+
+	// Unmap the linear heap
+	svcControlMemory(&tmp, __linear_heap, 0x0, __linear_heap_size, MEMOP_FREE, 0x0);
+
+	// Unmap the application heap
+	svcControlMemory(&tmp, __heapBase, 0x0, __heap_size, MEMOP_FREE, 0x0);
+
+	// Close some handles
+	__destroy_handle_list();
+
+	// Jump to the loader if it provided a callback
+	if (__system_retAddr)
+		__system_retAddr();
+
+	// Since above did not jump, end this process
+	svcExitProcess();
+}

M src/platform/3ds/main.c → src/platform/3ds/main.c

@@ -19,6 +19,7 @@ #include <sf2d.h>
 
 FS_archive sdmcArchive;
 
+extern bool allocateRomBuffer(void);
 static void GBA3DSLog(struct GBAThread* thread, enum GBALogLevel level, const char* format, va_list args);
 static Handle logFile;
 
@@ -60,11 +61,10 @@ }
 
 int main() {
 	struct GBAContext context;
-	srvInit();
-	aptInit();
-	hidInit(0);
-	fsInit();
-	sdmcInit();
+
+	if (!allocateRomBuffer()) {
+		return 1;
+	}
 
 	sf2d_init();
 	sf2d_set_clear_color(0);
@@ -146,13 +146,6 @@ FSFILE_Close(logFile);
 
 	sf2d_free_texture(tex);
 	sf2d_fini();
-
-	sdmcExit();
-	fsExit();
-	gfxExit();
-	hidExit();
-	aptExit();
-	srvExit();
 	return 0;
 }