ldrsrc.c

/*
# _____     ___ ____     ___ ____
#  ____|   |    ____|   |        | |____|
# |     ___|   |____ ___|    ____| |    \    PS2DEV Open Source Project.
#-----------------------------------------------------------------------
# Copyright ps2dev - http://www.ps2dev.org
# Licenced under Academic Free License version 2.0
# Review ps2sdk README & LICENSE files for further details.
*/
 
#include <elf_loader_common.h>
#include <kernel.h>
#include <ps2sdkapi.h>
#include <stdint.h>
#include <string.h>
#include <tamtypes.h>
 
#ifdef LOADER_ENABLE_DEBUG_COLORS
#define SET_GS_BGCOLOUR(colour)                                                                                        \
    do                                                                                                                   \
    {                                                                                                                    \
        *((volatile unsigned long int *)0x120000E0) = colour;                                                              \
    } while ( 0 )
#else
#define SET_GS_BGCOLOUR(colour)                                                                                        \
    do                                                                                                                   \
    {                                                                                                                    \
    } while ( 0 )
#endif
 
// Color status helper in BGR format
#define WHITE_BG 0xFFFFFF    // start main
#define CYAN_BG 0xFFFF00     // move memory
#define GREEN_BG 0x00FF00    // set memory to 0
#define RED_BG 0x0000FF      // never encountered execution command
#define MAGENTA_BG 0xFF00FF  // malformed loader info
#define BROWN_BG 0x2A2AA5    // before FlushCache
#define PURPLE_BG 0x800080   // before ExecPS2
 
//--------------------------------------------------------------
// Redefinition of init/deinit libc:
//--------------------------------------------------------------
// DON'T REMOVE, as it is for reducing binary size.
// These functions are defined as weak in /libc/src/init.c
//--------------------------------------------------------------
void _libcglue_init() {}
void _libcglue_deinit() {}
void _libcglue_args_parse(int argc, char **argv) {}
 
DISABLE_PATCHED_FUNCTIONS();
DISABLE_EXTRA_TIMERS_FUNCTIONS();
PS2_DISABLE_AUTOSTART_PTHREAD();
 
void __attribute__((section(".start"))) ldr_proc(void);
void ldr_proc(void)
{
    elf_loader_loaderinfo_t *ldrinfo;
    elf_loader_arginfo_t *arginfo;
 
    SET_GS_BGCOLOUR(WHITE_BG);
    ldrinfo = (void *)0x11004000;
    arginfo = (void *)0x00088000;
 
    {
        int i;
        for ( i = 0; i < (sizeof(ldrinfo->items) / sizeof(ldrinfo->items[0])); i += 1 )
        {
            elf_loader_loaderinfo_item_t *item;
 
            item = &(ldrinfo->items[i]);
            if ( item->dest_addr != NULL && item->src_addr != NULL && item->size != 0 )
            {
                SET_GS_BGCOLOUR(CYAN_BG);
                memmove(item->dest_addr, item->src_addr, item->size);
            }
            else if ( item->dest_addr != NULL && item->src_addr == NULL && item->size != 0 )
            {
                SET_GS_BGCOLOUR(GREEN_BG);
                memset(item->dest_addr, 0, item->size);
            }
            else if ( item->dest_addr != NULL && item->size == 0 )
            {
                SET_GS_BGCOLOUR(BROWN_BG);
                FlushCache(0);
                FlushCache(2);
                SET_GS_BGCOLOUR(PURPLE_BG);
                ExecPS2(item->dest_addr, item->src_addr, arginfo->argc, arginfo->argv);
            }
            else
            {
                SET_GS_BGCOLOUR(MAGENTA_BG);
                break;
            }
        }
    }
    SET_GS_BGCOLOUR(RED_BG);
    __builtin_trap();
}