/*---------------------------------------------------------------------------*
  Project:  rsodemo
  File:     static.c

  Copyright 2006 Nintendo. All rights reserved.

  These coded instructions, statements, and computer programs contain
  proprietary information of Nintendo of America Inc. and/or Nintendo
  Company Ltd., and are protected by Federal copyright law. They may
  not be disclosed to third parties or copied or duplicated in any form,
  in whole or in part, without the prior written consent of Nintendo.
  
  @version $Id: static.c,v 1.2 2008/06/13 04:43:37 mitu Exp $
  
  $NoKeywords: $
 *---------------------------------------------------------------------------*/

#include <revolution.h>

#include <revolution/rso.h>


#ifdef _DEBUG
#define MODULE_A     "/aD.rso"
#define MODULE_B     "/bD.rso"
#define STATIC_RSO   "/staticD.sel"
#else
#define MODULE_A     "/a.rso"
#define MODULE_B     "/b.rso"
#define STATIC_RSO   "/static.sel"
#endif

void _unresolved();

/*---------------------------------------------------------------------------*
   Load
 *---------------------------------------------------------------------------*/
// Load and link the specified module
static RSOObjectHeader* RsoLoadFixed(char* moduleName,RSOFixedLevel i_fixed_level)
{
    DVDFileInfo     fileInfo;
    s32             length;
    BOOL            result;
    RSOObjectHeader* module;
    u8*             bss;
    u32             fixed_size;
    u32             new_arenaLo;
    u32             old_arenaLo;
    result = DVDOpen(moduleName, &fileInfo);
    if (!result)
        return NULL;
    length = (s32) OSRoundUp32B(DVDGetLength(&fileInfo));
    module = OSAllocFromArenaLo((u32) length, 32);
    result = DVDRead(&fileInfo, module, length, 0);
    if (!result)
        return NULL;
    DVDClose(&fileInfo);
    //
    fixed_size = RSOGetFixedSize(module,i_fixed_level);

    // 0 indicates failure
    ASSERT(fixed_size);
    //
    bss = (u8 *)((u32)module + fixed_size);
    //  32-byte alignment
    bss = (u8*) OSRoundUp32B(bss);

    new_arenaLo = ((u32)bss + (u32)module->bssSize);
    new_arenaLo = OSRoundUp32B(new_arenaLo);
    old_arenaLo = (u32)OSGetMEM1ArenaLo();
    //
    if (module->bssSize > 0) {
        if(old_arenaLo < new_arenaLo) {
            // Increase the allocated region
            // When increasing, increase before executing RSOLocateObjectFixed
            OSSetMEM1ArenaLo((void*)new_arenaLo);
        }
    } else {
        bss = NULL;
    }
    //
    RSOLinkListFixed(module,bss,i_fixed_level);
    // When decreasing the memory area, do so after executing RSOLocateObjectFixed
    if(bss == NULL || old_arenaLo > new_arenaLo) {
        OSSetMEM1ArenaLo((void*)new_arenaLo);
    }
    return module;    
}

// Load and link the static module
static RSOObjectHeader* StaticRsoLoad(char* moduleName)
{
    DVDFileInfo     fileInfo;
    s32             length;
    BOOL            result;
    RSOObjectHeader* module;

    result = DVDOpen(moduleName, &fileInfo);
    if (!result)
        return NULL;
    length = (s32) OSRoundUp32B(DVDGetLength(&fileInfo));
    module = OSAllocFromArenaLo((u32) length, 32);
    result = DVDRead(&fileInfo, module, length, 0);
    if (!result)
        return NULL;
    DVDClose(&fileInfo);

    RSOListInit(module);
    
    return module;    
}

//
void _unresolved()
{
    OSReport("_unresolved func.\n");
}


// Functions and variables we want to access
void (*MainA)();
void (*IsAThere)();
int  (*g_intA);

//
static RSOExportFuncTable exp_tbl[] =
{
    {"MainA",   (u32 *)&MainA},
    {"IsAThere",(u32 *)&IsAThere},
    {"g_intA",  (u32 *)&g_intA},
};

//
static void RSOResolvedModuleA(const RSOObjectHeader* module)
{
    int i;
    for(i = 0; i < sizeof(exp_tbl)/sizeof(RSOExportFuncTable); i++) {
        *(exp_tbl[i].symbol_ptr) =
            (u32)RSOFindExportSymbolAddr(module, exp_tbl[i].symbol_name);
        
    }
}

//
//
static void RSOUnresolvedModuleA(void)
{
    int i;
    for(i = 0; i < sizeof(exp_tbl)/sizeof(RSOExportFuncTable); i++) {
        *(exp_tbl[i].symbol_ptr) = (u32)_unresolved;    
    }
}


//Main
int main(void)
{
    RSOObjectHeader* staticRso;
    RSOObjectHeader* moduleA;
    RSOObjectHeader* moduleB;

    // Generate weak symbol 'InlineFunc'
    DVDInit();
    
    //Read
    // Load static rso file
    OSReport("Loading static rso...\n");
    staticRso = StaticRsoLoad(STATIC_RSO);
    if (!staticRso)
        return 1;
    
    // Load and link module A
    OSReport("Linking module A...\n");
    moduleA = RsoLoadFixed(MODULE_A,RSO_FL_INTERNAL);
    if (!moduleA) {
        return 1;
    }

    // Load and link module B
    OSReport("Linking module B...\n");
    moduleB = RsoLoadFixed(MODULE_B,RSO_FL_INTERNAL);
    if (!moduleB) {
        return 1;
    }
        
    //Check whether everything has been resolved
    if (RSOIsImportSymbolResolvedAll(moduleA))
    {
        OSReport("moduleA's ImportSymbol is resolved all.\n");
    }
    if (RSOIsImportSymbolResolvedAll(moduleB))
    {
        OSReport("moduleB's ImportSymbol is resolved all.\n");
    }   

    // Since A and B are mutually linked, resolve both and then call prolog.
    OSReport("\nA prolog()\n");
    ((u32 (*)(void)) moduleA->prolog)();
    OSReport("\nB prolog()\n");
    ((u32 (*)(void)) moduleB->prolog)();
    
    //
    RSOResolvedModuleA(moduleA);
    //
    OSReport("MainA = %x\n",MainA);
    OSReport("g_intA = %x\n",g_intA);
    
    MainA();
    OSReport("g_intA = %d\n", *g_intA);
    *g_intA += 5;
    OSReport("g_intA + 5 = %d\n", *g_intA);
    MainA();
    
    //
    OSReport("\nA epilog()\n");
    ((u32 (*)(void)) moduleA->epilog)();
    RSOUnresolvedModuleA();
    //
    OSReport("\nB epilog()\n");
    ((u32 (*)(void)) moduleB->epilog)();

    // Since A and B mutually refer to each other, unlink after the epilog for both
    RSOUnLinkList(moduleA);
    RSOUnLinkList(moduleB);
    
    //
    OSReport("\nRSOLink finish all!\n");

    return 0;
}