osdsrc.c

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/*
# _____     ___ ____     ___ ____
#  ____|   |    ____|   |        | |____|
# |     ___|   |____ ___|    ____| |    \    PS2DEV Open Source Project.
#-----------------------------------------------------------------------
# Licenced under Academic Free License version 2.0
# Review ps2sdk README & LICENSE files for further details.
*/
 
#include <syscallnr.h>
#include <osd_config.h>
 
#include "osd.h"
#include "ExecPS2.h"
 
struct SyscallPatchData{
        unsigned int syscall;
        void *function;
};
 
static const struct SyscallPatchData SyscallPatchData[]={
        { __NR_SetOsdConfigParam, &SetOsdConfigParam},
        { __NR_GetOsdConfigParam, &GetOsdConfigParam},
        { __NR_SetOsdConfigParam2, &SetOsdConfigParam2},
        { __NR_GetOsdConfigParam2, &GetOsdConfigParam2},
        { 0xFFFFC402, &ExecPS2Patch},
};
 
SystemConfiguration_t SystemConfiguration = { .EEGS=0x40};
 
int _start(int syscall) __attribute__((section(".start")));
 
int _start(int syscall){
        unsigned int i;
        int result;
 
        InitSystemConfig(&SystemConfiguration, 0x26);
 
        for(i=0; i<5; i++){
                if(SyscallPatchData[i].syscall==syscall){
                        if(syscall==0xFFFFC402){
                                result=((unsigned int)SyscallPatchData[i].function>>2&0x03FFFFFF)|0x0C000000;   //Creates a JAL instruction to the function.
                        }
                        else result=(unsigned int)SyscallPatchData[i].function;
 
                        return result;
                }
        }
 
        return 0;
}