os_iacxl10_2004_3_16.cpp

自己编写的ARM处理器的指令集仿真

#include "armia_IAcxl10_2004_3_16.h"
#include <iostream.h>
#include <string.h>
#include <fcntl.h>
#include <errno.h>


    
UNL ARMISS_stru::Read_Word(UNL addr)
{
       return *( (UNL*)memptr.memptr + addr/4 );
}

UNL ARMISS_stru::Read_Byte(UNL addr)
{
       UNL temp;

       temp = Read_Word(addr);
       temp = temp >> ( ( addr % 4 ) * 8 ) ;
       temp = temp & 0xff;

       return temp;
}

void ARMISS_stru::Write_Word(UNL addr,UNL data)
{
       
       *( (UNL*)memptr.memptr + addr/4 ) = data;
}

void ARMISS_stru::Write_Byte(UNL addr,UNL data)
{
       
        memptr.memptr[addr] =(char) data;
        
}

void ARMISS_stru::SWIWrite(UNL f, UNL ptr, UNL len)
{
       int   i,res;
       char* local = new char[len];
     
   
       for( i = 0; i < len; i++ )
          local[i] = Read_Byte( ptr + i );
   
       res      = write(f, local, len);
       delete local;
       r_gen[0] = res == -1 ? -1 : len - res;
       
       //cout<<"done swiwrite"<<endl;
}

void ARMISS_stru::SWIOpen (UNL name, UNL flags)
{
  char dummy[2000];
  int i;

  for (i = 0; (dummy[i] = Read_Byte ( name + i)); i++)
    ;
   
   /* Filename ":tt" is special: it denotes stdin/out */
  if (strcmp (dummy, ":tt") == 0)
    {
      if (flags == 0)	/* opening tty "r" */
	  r_gen[0] = 0;	/* stdin */
      else
	  r_gen[0] = 1;	/* stdout */
    }
  else
    {
      r_gen[0] = (int) open (dummy, flags, 0666);
     }

}      
 
void ARMISS_stru::SWIRead(UNL f, UNL ptr, UNL len)
{
     int    res;
     int    i;
     char*  local= new char[len];

     res = read(f,local,len);
     if( res > 0 )
     for(i=0 ; i<res;i++)
       Write_Byte( ptr+i,local[i]);
     delete local;
      
     r_gen[0] = (res == -1)? -1: len - res;
         
}    

void ARMISS_stru::WriteCommandLineTo( UNL addr )
{
    UNL   temp;
    char* cptr = commandline;
     
    printf("in writecommandlineto(),cptr=%s,addr=0x%x\n",cptr,addr);
    if( cptr == 0 )
         cptr = "\0";
    temp = (UNL) (*cptr); 
    
    while( temp != 0 )
     {
          //if( addr == 0x182e0 ) cout<<(char)temp<<endl;
       //printf("temp=%c\n",temp);
          Write_Byte( addr++,temp);
          cptr++;
          temp = UNL(*cptr);
     }
          Write_Byte( addr,temp);
         
}