patch_disable_prefix_check.c

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/*
# _____     ___ ____     ___ ____
#  ____|   |    ____|   |        | |____|
# |     ___|   |____ ___|    ____| |    \    PS2DEV Open Source Project.
#-----------------------------------------------------------------------
# Copyright (c) 2003  Marcus R. Brown <mrbrown@0xd6.org>
# Licenced under Academic Free License version 2.0
# Review ps2sdk README & LICENSE files for further details.
*/
 
#include <tamtypes.h>
#include <kernel.h>
#include <string.h>
 
#include "slib.h"
 
extern slib_exp_lib_list_t _slib_cur_exp_lib_list;
 
int sbv_patch_disable_prefix_check(void)
{
        union {
                u8 buf[256];
                slib_exp_lib_t exp_lib;
        } buf;
        static u32 patch[2] ALIGNED(16)={
                0x03e00008,     /* jr $ra */
                0x00001021      /* addiu $v0, $0, 0 */
        };
        SifDmaTransfer_t dmat;
        slib_exp_lib_t *modload_lib = &buf.exp_lib;
 
        memset(&_slib_cur_exp_lib_list, 0, sizeof(slib_exp_lib_list_t));
 
        if (!slib_get_exp_lib("modload", modload_lib))
                return -1;
 
        dmat.src=patch;
        dmat.size=sizeof(patch);        //16-bytes will be written to IOP RAM, but the function on the IOP side is longer than 16 bytes in length.
        dmat.dest=modload_lib->exports[15];
        dmat.attr=0;
 
        SifSetDma(&dmat, 1);
 
        return 0;
}