APE Megabuf assignment

PAK-9

10th March 2005 10:53 UTC

APE Megabuf assignment
Does anyone know if there is a way to write directly to the megabuf in an APE? I want to assign thousands of megabuf items so compiling assignment code isnt really an option. If I could just get the address of the start of the megabuf or something... any ideas?

PAK-9

16th March 2005 18:33 UTC

Geez thanks for the input guys

hboy

16th March 2005 20:24 UTC

dunno. :D

Tuggummi

16th March 2005 20:56 UTC

Re: APE Megabuf assignment

Originally posted by PAK-9
If I could just get the address of the megabuf

Sure, it's:

Mr.Buf Mega
1337 SDK-Road
AmpLand

PAK-9

17th March 2005 14:29 UTC

omg thx!!1!one

Warrior of the Light

17th March 2005 14:32 UTC

Re: APE Megabuf assignment

Originally posted by PAK-9
Does anyone know if there is a way to write directly to the megabuf in an APE?

I guess there isn't anyone then..

S-uper_T-oast

17th March 2005 16:53 UTC

I don't see why it wouldn't be possible to do, but I don't know how.

MaTTFURY

17th March 2005 23:54 UTC

ask jaak or unconed or tomylobo :p

TomyLobo

18th March 2005 03:59 UTC

there might be one... it will require a bit of reverse engineering though.
i started with that but have given up at some point. here's what i have:

this little code snippet will give you the address of the megabuf function:


VM_CONTEXT      vmc = g_extinfo->allocVM();
compileContext  *ctx = (compileContext *)vmc;
VM_CODEHANDLE   cod = g_extinfo->compileVMcode(vmc, "gmegabuf(0)");
codeHandleType  *ch = (codeHandleType *)cod;
char *output = new char[1024];
memset(output,0,1024);

void *foo = *((void **)(((unsigned char *)ch->code)+25));
static double * (NSEEL_CGEN_CALL *__megabuf)(double ***,double *);
__asm {
    mov eax,foo
    mov __megabuf,eax
}
void (*blub)(void) = (void (*)(void))(ch->code);
//blub();
sprintf(output,"%X",__megabuf);
MessageBox(NULL, output, "debug output", 0);
delete[] output;
g_extinfo->freeCode(cod);
g_extinfo->freeVM(vmc);

you also need to put that struct somewhere:


#define YYSTYPE int

typedef struct
{
  double **varTable_Values;
  char   **varTable_Names;
  int varTable_numBlocks;

  int errVar;
  int colCount;
  int result;
  char last_error_string[256];
  YYSTYPE yylval;
  int   yychar;                 /*  the lookahead symbol                */
  int yynerrs;                  /*  number of parse errors so far       */
  char yytext[256];
  char lastVar[256];

  char    *llsave[16];             /* Look ahead buffer            */
  char    llbuf[100];             /* work buffer                          */
  char    *llp1;//   = &llbuf[0];    /* pointer to next avail. in token      */
  char    *llp2;//   = &llbuf[0];    /* pointer to end of lookahead          */
  char    *llend;//  = &llbuf[0];    /* pointer to end of token              */
  char    *llebuf;// = &llbuf[sizeof llbuf];
  int     lleof;
  int     yyline;//  = 0;

  void *tmpblocks_head,*blocks_head;
  int computTableTop; // make it abort on potential overflow =)
  int l_stats[4]; // source bytes, static code bytes, call code bytes, data bytes

  void *userfunc_data[64];
}
compileContext;

#define LLB_DSIZE (65536-64)
typedef struct _llBlock {
        struct _llBlock *next;
  int sizeused;
        char block[LLB_DSIZE];
} llBlock;

typedef struct {
  int workTablePtr_size;

  llBlock *blocks;
  void *code;
  int code_stats[4];
} codeHandleType;

#define NSEEL_CGEN_CALL __fastcall

you can also find that in the nseel folder of the winamp SDK. better get it from there :)

PAK-9

18th March 2005 16:31 UTC

Well the address of the megabuf function is as good a starting point as any, thanks