main.c 究竟有用没用呢

1987512

/*
        PSP IPL main.bin dumper
*/

#include <psptypes.h>

#include "psp_uart.h"
#include "kprintf.h"
#include "patch.h"
#include "syscon.h"
#include "cache.h"

#include "memstk.h"
#include "tff.h"                /* Tiny-FatFs declarations */
#include "fatload.h"

#define DUMP_MAIN_BIN 1

// load IPL from ms file (or NAND Flash)
#define LOAD_IPL_FILE_NAME "/ipl.bin"

// load IPL from ms file (or NAND Flash)
#define MAIN_BIN_FILE_NAME "/ipl_main.bin"
#define MAIN_BIN_SIZE 0x010000

/****************************************************************************
        title message for header
****************************************************************************/
const char __title__[] __attribute__ (( section (".init"))) = "IPL main.bin DUMPER";

/****************************************************************************
        reset PSP
****************************************************************************/
void reboot_psp(void)
{
        // reset reboot
        Kprintf("Reset PSP\n\n");
        pspSysconResetDevice(1);
        while(1);
}

/****************************************************************************
        INTERRIGENT SEARCH
****************************************************************************/
static u32 mips_regs[32];
static void parge_regs(void)
{
        int i;
        for(i=0;i<32;i++) mips_regs = 0;
}

u32 *search_long_jump(void *start,void *end,u32 jump_address)
{
        u32 *ptr;
        int reg;

        parge_regs();
        for(ptr=(u32 *)start;ptr<(u32 *)end;ptr++)
        {
                if( (ptr[0] & 0xffe00000) == MIPS_LUI(0,0) )
                {
                        reg = (ptr[0]>>16) & 31;
                        mips_regs[reg]=ptr[0]<<16;
Kprintf("%08X:LUI R%2d,%08X\n",(u32)ptr,reg,mips_regs[reg]);
                }

                if( (ptr[0] & 0xfc1fffff) == MIPS_JR(0) )
                {
                        reg = (ptr[0]>>21)&31;
Kprintf("%08X:JR r%2d[%08X]\n",(u32)ptr,reg,mips_regs[reg]);
                        if(mips_regs[reg]==jump_address)
                        {
Kprintf("Found main.bin call %08X , entry %08X\n",(u32)ptr,mips_regs[reg]);
                                // main_bin_entry = mips_regs[reg];
                                return ptr;
                        }
                        parge_regs();
                }

                if( ptr[0] & 0xfc000000 == MIPS_J(0) )
                {
Kprintf("%08X:J\n");
                        parge_regs();
                }
        }
        return 0;
}

/****************************************************************************
        before jump main.bin

        (after decrypt/loaded main.bin)
****************************************************************************/
void patch_main_bin(void)
{
        u32 *code = (u32 *)0x04000000;

Kprintf("dump main.bin\n");
        ms_save_file(MAIN_BIN_FILE_NAME,(void *)0x04000000,MAIN_BIN_SIZE);

Kprintf("\nMAIN.BIN DUMPED!\n");

        // reset reboot
        reboot_psp();
}

/****************************************************************************
        entry point
****************************************************************************/
int main(void)
{
        void (*ipl_bin_entry)(void);
        u32 *patch_point;
        int entry = 0;

        Kprintf("ENTER:%s\n",__title__);

        // init I/O
        pspSyscon_init();
        pspSysconCtrlLED(0,1);
        pspSysconCtrlLED(1,1);
        pspSysconCtrlMsPower(1);

        // MS/FAT system
        ms_fat_init();

#ifdef LOAD_IPL_FILE_NAME
        // load FW1.50 IPL for initialize DDR-SDRAM controller
        entry = (int)ms_load_ipl(LOAD_IPL_FILE_NAME);
        if(entry == 0)
        {
                Kprintf("can't load %s\n",LOAD_IPL_FILE_NAME);
                while(1);
        }
#else
        // load IPL from NAND flash
        nand_load_ipl();
#endif

        Kprintf("IPL loaded\n");

        // interrigent HOOK , "jump main.bin"
        patch_point = search_long_jump((void *)entry, (void *)(entry + 0x1000),0x04000000);
        ms_save_file("loader",(void *)entry,0x1000);
        if(!patch_point)
        {
                reboot_psp();
        }
        // hook JR instruction
        patch_point[0] = MIPS_J(patch_main_bin);
        ms_save_file("loader_p",(void *)entry,0x1000);
        // clear main.bin area
        u32 *ptr;
        for(ptr=(u32 *)0x04000000;ptr<(u32 *)(0x04080000+MAIN_BIN_SIZE);ptr++) *ptr=0;

        pspClearDcache();
        pspClearIcache();

        // goto IPL.bin
        ipl_bin_entry = (void *)entry;
        ipl_bin_entry();

        return 0;
}

pegasama

有这能做啥呢？
怎么编译？
这些头文件都有全么？

centuryt

数据库都没设定明白，怎么可能会有用呢？