loader.c

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/*
# _____     ___ ____     ___ ____
#  ____|   |    ____|   |        | |____|
# |     ___|   |____ ___|    ____| |    \    PS2DEV Open Source Project.
#-----------------------------------------------------------------------
# (c) 2020 Francisco Javier Trujillo Mata <fjtrujy@gmail.com>
# Licenced under Academic Free License version 2.0
# Review ps2sdk README & LICENSE files for further details.
*/
 
#include <kernel.h>
#include <loadfile.h>
#include <sifrpc.h>
#include <errno.h>
 
//--------------------------------------------------------------
//Start of function code:
//--------------------------------------------------------------
// Clear user memory
// PS2Link (C) 2003 Tord Lindstrom (pukko@home.se)
//         (C) 2003 adresd (adresd_ps2dev@yahoo.com)
//--------------------------------------------------------------
static void wipeUserMem(void)
{
        int i;
        for (i = 0x100000; i < GetMemorySize(); i += 64) {
                asm volatile(
                        "\tsq $0, 0(%0) \n"
                        "\tsq $0, 16(%0) \n"
                        "\tsq $0, 32(%0) \n"
                        "\tsq $0, 48(%0) \n" ::"r"(i));
        }
}
 
//--------------------------------------------------------------
//End of func:  void wipeUserMem(void)
//--------------------------------------------------------------
// *** MAIN ***
//--------------------------------------------------------------
int main(int argc, char *argv[])
{
        static t_ExecData elfdata;
        int ret;
 
        if (argc < 1) {  // arg1=path to ELF
                return -EINVAL;
        }
 
        // Initialize
        SifInitRpc(0);
        wipeUserMem();
 
        //Writeback data cache before loading ELF.
        FlushCache(0);
        ret = SifLoadElf(argv[0], &elfdata);
        if (ret == 0) {
                SifExitRpc();
                FlushCache(0);
                FlushCache(2);
 
                // Following the standard the first parameter of a argv is the executable itself
                return ExecPS2((void *)elfdata.epc, (void *)elfdata.gp, argc, argv);
        } else {
                SifExitRpc();
                return -ENOENT;
        }
}
 
//--------------------------------------------------------------
//End of func:  int main(int argc, char *argv[])
//--------------------------------------------------------------
//End of file:  loader.c
//--------------------------------------------------------------