usbloadergx/source/usbloader/apploader.c

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#include <stdio.h>
#include <ogcsys.h>
#include <string.h>
#include <malloc.h>
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#include "apploader.h"
#include "wdvd.h"
#include "wpad.h"
#include "disc.h"
#include "alternatedol.h"
#include "fstfile.h"
#include "gecko.h"
#include "patches/gamepatches.h"
#include "patches/wip.h"
#include "settings/SettingsEnums.h"
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/* Apploader function pointers */
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typedef int (*app_main)(void **dst, int *size, int *offset);
typedef void (*app_init)(void(*report)(const char *fmt, ...));
typedef void *(*app_final)();
typedef void (*app_entry)(void(**init)(void(*report)(const char *fmt, ...)), int(**main)(), void *(**final)());
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/* Apploader pointers */
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static u8 *appldr = (u8 *) 0x81200000;
/* Constants */
#define APPLDR_OFFSET 0x2440
/* Variables */
static u32 buffer[0x20] ATTRIBUTE_ALIGN( 32 );
s32 Apploader_Run(entry_point *entry, char * dolpath, u8 alternatedol, u32 alternatedoloffset)
{
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app_entry appldr_entry;
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app_init appldr_init;
app_main appldr_main;
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app_final appldr_final;
u32 appldr_len;
s32 ret;
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gprintf("\nApploader_Run() started\n");
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/* Read apploader header */
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ret = WDVD_Read(buffer, 0x20, APPLDR_OFFSET);
if (ret < 0) return ret;
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/* Calculate apploader length */
appldr_len = buffer[5] + buffer[6];
/* Read apploader code */
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ret = WDVD_Read(appldr, appldr_len, APPLDR_OFFSET + 0x20);
if (ret < 0) return ret;
/* Set apploader entry function */
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appldr_entry = (app_entry) buffer[4];
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/* Call apploader entry */
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appldr_entry(&appldr_init, &appldr_main, &appldr_final);
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/* Initialize apploader */
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appldr_init(gprintf);
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for (;;)
{
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void *dst = NULL;
int len = 0, offset = 0;
/* Run apploader main function */
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ret = appldr_main(&dst, &len, &offset);
if (!ret) break;
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/* Read data from DVD */
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WDVD_Read(dst, len, (u64) (offset << 2));
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RegisterDOL((u8 *) dst, len);
DCFlushRange(dst, len);
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}
*entry = appldr_final();
/** Load alternate dol if set **/
if (alternatedol == ALT_DOL_FROM_SD_USB)
{
ClearDOLList();
wip_reset_counter();
void *dolbuffer = NULL;
int dollen = 0;
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bool dolloaded = Load_Dol(&dolbuffer, &dollen, dolpath);
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if (dolloaded)
*entry = (entry_point) load_dol_image(dolbuffer);
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if (dolbuffer) free(dolbuffer);
}
else if (alternatedol == ALT_DOL_FROM_GAME && alternatedoloffset != 0)
{
ClearDOLList();
wip_reset_counter();
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FST_ENTRY *fst = (FST_ENTRY *) *(u32 *) 0x80000038;
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//! Check if it's inside the limits
if(alternatedoloffset >= fst[0].filelen)
return 0;
*entry = (entry_point) Load_Dol_from_disc(fst[alternatedoloffset].fileoffset);
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}
return 0;
}