arch/.unmaintained/m68k-emul/preparecontext.c

   1 /*
   2     Copyright © 1995-2011, The AROS Development Team. All rights reserved.
   3     $Id$
   4 */
   5
   6 #include <exec/types.h>
   7 #include <aros/libcall.h>
   8
   9 #include "exec_util.h"
  10
  11 #error "PrepareContext() has been changed. Additional tagList param, etc."
  12 #error "This one here needs to be rewritten!"
  13
  14 BOOL PrepareContext(struct Task *task, APTR entryPoint, APTR fallBack,
  15                     struct TagItem *tagList, struct ExecBase *SysBase)
  16 {
  17     UBYTE *sp=(UBYTE *)stackPointer;
  18     int i;
  19
  20     /*
  21         mc68000 version. As long as no FPU is in use this works for the
  22         other mc680xx brands as well.
  23     */
  24
  25     /* Push fallback address */
  26     sp-=sizeof(APTR);
  27     *(APTR *)sp=fallBack;
  28
  29     /* Now push the context. Prepare a rts first (pc). */
  30     sp-=sizeof(APTR);
  31     *(APTR *)sp=entryPoint;
  32
  33     /* Push 15 registers */
  34     for(i=0;i<15;i++)
  35     {
  36         sp-=sizeof(LONG);
  37         *(LONG *)sp=0;
  38     }
  39
  40     return sp;
  41 } /* PrepareContext */