usbloadergx/source/homebrewboot/dolloader.c

#include <malloc.h>
#include <stdio.h>
#include <stdlib.h>
#include <ogc/machine/processor.h>
#include <gccore.h>
#include <dirent.h>
#include <string.h>

#include "dolloader.h"

typedef struct _dolheader
{
    u32 text_pos[7];
    u32 data_pos[11];
    u32 text_start[7];
    u32 data_start[11];
    u32 text_size[7];
    u32 data_size[11];
    u32 bss_start;
    u32 bss_size;
    u32 entry_point;
} dolheader;

u32 load_dol( const void *dolstart, struct __argv *argv )
{
    u32 i;
    dolheader *dolfile;

    if ( dolstart )
    {
        dolfile = ( dolheader * ) dolstart;
        for ( i = 0; i < 7; i++ )
        {
            if ( ( !dolfile->text_size[i] ) || ( dolfile->text_start[i] < 0x100 ) ) continue;
            ICInvalidateRange ( ( void * ) dolfile->text_start[i], dolfile->text_size[i] );
            memcpy( ( void * ) dolfile->text_start[i], dolstart + dolfile->text_pos[i], dolfile->text_size[i] );
        }

        for ( i = 0; i < 11; i++ )
        {
            if ( ( !dolfile->data_size[i] ) || ( dolfile->data_start[i] < 0x100 ) ) continue;
            memcpy( ( void * ) dolfile->data_start[i], dolstart + dolfile->data_pos[i], dolfile->data_size[i] );
            DCFlushRangeNoSync ( ( void * ) dolfile->data_start[i], dolfile->data_size[i] );
        }

        memset ( ( void * ) dolfile->bss_start, 0, dolfile->bss_size );
        DCFlushRange( ( void * ) dolfile->bss_start, dolfile->bss_size );

        if ( argv && argv->argvMagic == ARGV_MAGIC )
        {
            void *new_argv = ( void * )( dolfile->entry_point + 8 );
            memcpy( new_argv, argv, sizeof( *argv ) );
            DCFlushRange( new_argv, sizeof( *argv ) );
        }

        return dolfile->entry_point;
    }
    return 0;
}