init commit take 2

thread/3ds.ld

@@ -0,0 +1,24 @@
+OUTPUT_FORMAT("elf32-littlearm", "elf32-littlearm", "elf32-littlearm")
+OUTPUT_ARCH(arm)
+
+/*0x080C3EE0*/
+ENTRY(_start)
+
+SECTIONS
+{
+  . = 0x0801A6E0;
+  start_addr = .;
+  .text.start : { *(.text.start) }
+  .text       : { *(.text) *(.text*) }
+  .rodata     : { *(.rodata) *(.rodata*) }
+  .data       : { *(.data) *(.data*) }
+  .bss        : { *(.bss) *(.bss*) }
+  /*. = ALIGN(32);*/
+  /*.stack : {
+    stack_start = .;
+    . += 0x40;
+    . = ALIGN(32);
+    stack_end = .;
+  }*/
+  total_size = . - start_addr;
+}

thread/Makefile

@@ -0,0 +1,16 @@
+ifeq ($(strip $(DEVKITARM)),)
+$(error "Please set DEVKITARM in your environment. export DEVKITARM=<path to>devkitARM")
+endif
+
+include $(DEVKITARM)/ds_rules
+
+SFLAGS=-c -mcpu=arm946e-s -march=armv5te -mlittle-endian -fshort-wchar
+CFLAGS=$(SFLAGS) -std=c99
+
+all:
+	$(CC) -g source/thread.c source/lib.c $(CFLAGS)
+	$(CC) -g source/_start.s source/FS.S -I source $(SFLAGS)
+	$(CC) -nostdlib -T 3ds.ld _start.o thread.o lib.o FS.o
+	$(OBJCOPY) -O binary a.out arm9.bin
+	rm -f *.o *.out
+	

thread/source/FS.h

@@ -0,0 +1,9 @@
+#ifndef FS_H
+#define FS_H
+#include <stdio.h>
+extern unsigned int fopen9(void *handle, wchar_t* name, unsigned int flag);
+extern void fwrite9(void* handle, unsigned int* bytesWritten, void* dst, unsigned int size);
+extern void fread9(void* handle, unsigned int* bytesRead, void *src, unsigned int size);
+extern void fclose9(void *handle);
+
+#endif

thread/source/FS.s

@@ -0,0 +1,41 @@
+.text
+
+.thumb
+.global fopen9
+.type fopen9, %function
+	fopen9:
+		push {r0-r6, lr}
+		ldr r4, =0x0805B015
+		blx r4
+		pop {r0-r6, pc}
+.pool
+
+.thumb
+.global fwrite9
+.type fwrite9, %function
+	fwrite9:
+		push {r4, lr}
+		ldr r4, =0x0805C379
+		blx r4
+		pop {r4, pc}
+.pool
+
+.thumb
+.global fread9
+.type fread9, %function
+	fread9:
+		push {r4, lr}
+		ldr r4, =0x0804D855
+		blx r4
+		pop {r4, pc}
+.pool
+
+.thumb
+.global fclose9
+.type fclose9, %function
+	fclose9:
+		push {r4, lr}
+		ldr r4, =0x08053C6D
+		blx r4
+		pop {r4, pc}
+.pool

thread/source/_start.s

@@ -0,0 +1,21 @@
+.arm
+.global thread
+.global _start
+_start:
+	push {r0-r12 , lr}
+	ldr r0, =0x08000c00
+	mov r1, #0xA00
+	mov r2, #0x0
+	thread_stack_loop:
+		str r2, [r0], #0x4
+		subs r1, r1, #4
+		bgt thread_stack_loop
+	mov r0, #0x3F @ thread priority
+	ldr r1, =thread @ thread_addr
+	mov r2, #0x0 @ arg
+	ldr r3, =0x08000c00 @ StackTop
+	ldr r4, =0x1
+	svc 0x8
+	pop {r0-r12 , lr}
+	ldr r0, =0x80CB0A8
+	ldr pc, =0x080860B4

thread/source/lib.c

@@ -0,0 +1,36 @@
+#include "lib.h"
+
+void *memset(void * ptr, int value, unsigned int num){
+    unsigned char *p = ptr;
+    while (num) {
+        *p++ = value;
+        num--;
+    }
+    return ptr;
+}
+
+int strcomp(char* s1, char* s2, unsigned int size){
+	for(int i = 0; i < size; i++){
+        if(s1[i] != s2[i]) return 0;
+    }
+	return 1;
+}
+
+void strcopy(char* dest, char* source, unsigned int size){
+	for(int i = 0; i < size*2; i++) dest[i] = source[i];
+}
+
+int memcmp(void* buf1, void* buf2, int size){
+	int equal = 0;
+	for(int i = 0; i < size; i++){
+		if(*((unsigned char*)buf1 + i) != *((unsigned char*)buf2 + i)){
+			equal = i;
+			break;
+		}
+	}
+	return equal;
+}
+
+unsigned isPressed(unsigned bitfield){
+	return ((~*(unsigned *)0x10146000) & 0xFFF) == (bitfield & 0xFFF) ? 1 : 0;
+}

thread/source/lib.h

@@ -0,0 +1,25 @@
+#ifndef LIB_H
+#define LIB_H
+
+#define BUTTON_A      (1 << 0)
+#define BUTTON_B      (1 << 1)
+#define BUTTON_SELECT (1 << 2)
+#define BUTTON_START  (1 << 3)
+#define BUTTON_RIGHT  (1 << 4)
+#define BUTTON_LEFT   (1 << 5)
+#define BUTTON_UP     (1 << 6)
+#define BUTTON_DOWN   (1 << 7)
+#define BUTTON_R1     (1 << 8)
+#define BUTTON_L1     (1 << 9)
+#define BUTTON_X      (1 << 10)
+#define BUTTON_Y      (1 << 11)
+#define BUTTON_ZL     (1 << 14)
+#define BUTTON_ZR     (1 << 15)
+
+void* memset(void * ptr, int value, unsigned int num);
+int strcomp(char* s1, char*s2, unsigned int size);
+void strcopy(char* dest, char* source, unsigned int size);
+int memcmp(void* buf1, void* buf2, int size);
+unsigned isPressed(unsigned bitfield);
+
+#endif

thread/source/thread.c

@@ -0,0 +1,87 @@
+/*
+*   thread.c
+*       by Reisyukaku
+*/
+
+#include <wchar.h>
+#include <stdio.h>
+#include "thread.h"
+#include "lib.h"
+#include "FS.h"
+
+#define VRAM (unsigned char*)0x18000000
+#define FCRAM (unsigned char*)0x20000000
+#define FCRAM_EXT (unsigned char*)0x28000000
+#define ARM9_MEM (unsigned char*)0x8000000
+#define AXIWRAM (unsigned char*)0x1FF80000
+#define TOP_FRAME 0
+#define BOT_FRAME 1
+
+unsigned char handle[32];
+unsigned char bmpHead[] = {	
+	0x42, 0x4D, 0x36, 0x65, 0x04, 0x00, 0x00, 0x00, 
+	0x00, 0x00, 0x36, 0x00, 0x00, 0x00, 0x28, 0x00, 
+	0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0xF0, 0x00, 
+	0x00, 0x00, 0x01, 0x00, 0x18, 0x00, 0x00, 0x00, 
+	0x00, 0x00, 0x00, 0x65, 0x04, 0x00, 0x00, 0x00, 
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00
+};
+
+void memdump(void* filename, void* buf, unsigned int size){
+	unsigned int br = 0;
+    memset(&handle, 0, 32);
+	fopen9(&handle, filename, 6);
+	fwrite9(&handle, &br, buf, size);
+	fclose9(&handle);
+	memset(VRAM+0x1E6000, 0xFF, 0x46500);
+}
+
+void transpose (void * dst, const void * src, unsigned dim1, unsigned dim2, unsigned item_length) {
+  char * ptr_write;
+  const char * ptr_read;
+  unsigned x, y, z;
+  for (x = 0; x < dim1; x ++) for (y = 0; y < dim2; y ++) {
+    ptr_write = ((char *) dst) + item_length * (y * dim1 + x);
+    ptr_read = ((const char *) src) + item_length * (x * dim2 + y);
+    for (z = 0; z < item_length; z ++) *(ptr_write ++) = *(ptr_read ++);
+  }
+}
+
+void screenShot(int frame){
+    unsigned int br;
+    short width = frame == 0 ? 400 : 320;
+    short height = 240;
+    int frameOff = frame == 0 ? 0x1E6000 : 0x48F000;  //<- Defaults
+    int length = frame == 0 ? 0x46500 : 0x38400;
+    memset(&handle, 0, 32);
+	fopen9(&handle, frame == 0 ? L"sdmc:/screen_top.bmp" : L"sdmc:/screen_bot.bmp", 6);
+    transpose(FCRAM+0xF80000, VRAM+frameOff, width, height, 3);
+    bmpHead[18] = frame == 0 ? 0x90 : 0x40;
+    fwrite9(&handle, &br, bmpHead, 0x36);
+    fwrite9(&handle, &br, FCRAM+0xF80000, length);
+    fclose9(&handle);
+    memset(VRAM+frameOff, 0xFF, 0x46500);
+}
+
+void patches(void){
+    //Change version string
+    for(int i = 0; i < 0x600000; i+=4){
+		if(strcomp((void*)0x27B00000  - i, (void*)L"Ver.", 4)) strcopy((void*)0x27B00000 - i, (void*)L"\uE024Rei", 4);
+	}
+}
+
+void thread(void){
+	while(1){
+		if(isPressed(BUTTON_SELECT | BUTTON_X)){
+            screenShot(TOP_FRAME);
+            screenShot(BOT_FRAME);
+        }
+        if(isPressed(BUTTON_START)){ 
+            memdump(L"sdmc:/AXIWRAM.bin", AXIWRAM, 0x00080000);
+            memdump(L"sdmc:/FCRAM.bin", FCRAM, 0x010000000); 
+        }
+        patches();
+	}
+	__asm("SVC 0x09");
+}

thread/source/thread.h

@@ -0,0 +1,6 @@
+/*
+*   thread.h
+*       by Reisyukaku
+*/
+
+void thread(void);