usbloadergx/source/lstub.cpp

//functions for manipulating the HBC stub by giantpune

#include <string.h>
#include <ogcsys.h>
#include <malloc.h>
#include <stdio.h>

#include "lstub.h"
#include "gecko.h"

#include "wad/nandtitle.h"

extern const u8 stub_bin[];
extern const u32 stub_bin_size;

static char* determineStubTIDLocation()
{
    u32 *stubID = (u32*) 0x80001818;

    //HBC stub 1.0.6 and lower, and stub.bin
    if (stubID[0] == 0x480004c1 && stubID[1] == 0x480004f5)
        return (char *) 0x800024C6;

    //HBC stub changed @ version 1.0.7.  this file was last updated for HBC 1.0.8
    else if (stubID[0] == 0x48000859 && stubID[1] == 0x4800088d) return (char *) 0x8000286A;

    //hexdump( stubID, 0x20 );
    return NULL;

}

s32 Set_Stub(u64 reqID)
{
    if (NandTitles.IndexOf(reqID) < 0) return WII_EINSTALL;

    char *stub = determineStubTIDLocation();
    if (!stub) return -68;

    stub[0] = TITLE_7( reqID );
    stub[1] = TITLE_6( reqID );
    stub[8] = TITLE_5( reqID );
    stub[9] = TITLE_4( reqID );
    stub[4] = TITLE_3( reqID );
    stub[5] = TITLE_2( reqID );
    stub[12] = TITLE_1( reqID );
    stub[13] = ((u8) (reqID));

    DCFlushRange(stub, 0x10);

    return 1;

}

s32 Set_Stub_Split(u32 type, const char* reqID)
{
    char tmp[4];
    u32 lower;
    sprintf(tmp, "%c%c%c%c", reqID[0], reqID[1], reqID[2], reqID[3]);
    memcpy(&lower, tmp, 4);
    u64 reqID64 = TITLE_ID( type, lower );
    return Set_Stub(reqID64);

}

void loadStub()
{
    char *stubLoc = (char *) 0x80001800;
    memcpy(stubLoc, stub_bin, stub_bin_size);
    DCFlushRange(stubLoc, stub_bin_size);
}

u64 getStubDest()
{
    if (!hbcStubAvailable()) return 0;

    char ret[8];
    u64 retu = 0;

    char *stub = determineStubTIDLocation();
    if (!stub) return 0;

    ret[0] = stub[0];
    ret[1] = stub[1];
    ret[2] = stub[8];
    ret[3] = stub[9];
    ret[4] = stub[4];
    ret[5] = stub[5];
    ret[6] = stub[12];
    ret[7] = stub[13];

    memcpy(&retu, ret, 8);

    return retu;
}

u8 hbcStubAvailable()
{
    char * sig = (char *) 0x80001804;
    return (sig[0] == 'S' && sig[1] == 'T' && sig[2] == 'U' && sig[3] == 'B' && sig[4] == 'H' && sig[5] == 'A'
            && sig[6] == 'X' && sig[7] == 'X') ? 1 : 0;
}