LowLevel/Luma3DS-3GX
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Emunand self patching; found solution for some hard coded stuff/FS more flexible; got rid of screenShot; implemented PoC RAM dumper using txt file; changed location of arm9 thread; fixed ver string; tons of organization and cleaning up for easier to read and modify code.

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This commit is contained in:
Reisyukaku
2016-01-23 03:53:45 -05:00
parent 2465cb0fa9
commit 62d8d582c1
14 changed files with 127 additions and 91 deletions
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4
thread/source/_start.s
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@@ -13,8 +13,8 @@ _start:
ldr r1, =thread @ thread_addr
mov r2, #0x0 @ arg
ldr r3, =0x08000c00 @ StackTop
ldr r4, =0x1
ldr r4, =0xFFFFFFFE
svc 0x8
pop {r0-r12 , lr}
ldr r0, =0x80E3408
ldr r0, =0x080E3408
ldr pc, =0x0808519C

18
thread/source/lib.c
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@@ -31,6 +31,24 @@ int memcmp(void* buf1, void* buf2, int size){
return equal;
}
int atoi(const char* nptr){
int result = 0,
position = 1;
const char* p = nptr;
while(*p) ++p;
for(--p; p >= nptr; p--){
if(*p < 0x30 || *p > 0x39) break;
else{
result += (position) * (*p - 0x30);
position *= 10;
}
}
result = ((nptr[0] == '-')? -result : result);
return result;
}
unsigned isPressed(unsigned bitfield){
return ((~*(unsigned *)0x10146000) & 0xFFF) == (bitfield & 0xFFF) ? 1 : 0;
}

1
thread/source/lib.h
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@@ -20,6 +20,7 @@ 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);
int atoi(const char* nptr);
unsigned isPressed(unsigned bitfield);
#endif

74
thread/source/thread.c
View File

@@ -10,78 +10,48 @@
#include "lib.h"
#include "FS.h"
//ram stuff
#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
//file stuff
#define READ 0
#define WRITE 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 fileReadWrite(void *buf, void *path, int size, char rw){
unsigned int br = 0;
memset(&handle, 0, 32);
fopen9(&handle, path, 6);
if(rw == 0) fread9(&handle, &br, buf, size);
else fwrite9(&handle, &br, buf, size);
fclose9(&handle);
}
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);
fileReadWrite(buf, filename, size, WRITE);
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)){
if(strcomp((void*)0x27B00000 - i + 0x28, (void*)"T_ver_00", 4)) strcopy((void*)0x27B00000 - i, (void*)L"\uE024Rei", 4);
if(strcomp((void*)0x27B00000 - i + 0x0A, (void*)L"%d.%d.%d-%d", 11)) 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 | BUTTON_X)){
memdump(L"sdmc:/FCRAM.bin", (void*)0x27500000, 0x600000);
if(isPressed(BUTTON_START | BUTTON_X)){
unsigned char buf[0x10] = {0};
int loc = 0;
fileReadWrite(buf, L"sdmc:/rei/RAM.txt", 0x20, READ);
loc = atoi(buf);
memdump(L"sdmc:/RAMdmp.bin", (void*)loc, 0x500000);
}
patches();
}