100分请教---- DataAbort exception!----关于数据终止异常

gjb04720650 2010-6-9 21:31 楼主

         一般数据终止异常在编程方面是：指针操作错误，或者数组越界等等！而我现在一下的程序（在S3C2440裸奔时）就是看不出哪里造成数据终止异常，现在请教各位大侠！
struct FAT_Init_Arg Init_Arg_SD;
struct FAT_Init_Arg *pArg=NULL;

UINT32 FAT_Enter_Dir(INT8 *path)
{
UINT32 Cur_Clust=0,sec_temp=0,iSec=0,iDir=0,Old_Clust=0;
UINT8 i=1,counter=0,flag=0;
struct direntry *pDir=NULL;
INT8 name[20]={0};

  INT8 *Mypath=NULL;
  Mypath=(INT8 *)malloc(30);
  Mypath=path;
  pDir=malloc(sizeof(struct direntry));

pArg=&Init_Arg_SD;
Cur_Clust=pArg->FirstDirClust;

  if(*(Mypath+1)==0 && *(Mypath+0)=='\\')
   {
      Uart_Printf("*(Mypath+1)=%xh,*(Mypath+0)=%xh \n",  *(Mypath+1),*(Mypath+0));
   return Cur_Clust;
    }

else
{

  while(*(Mypath+i)!=0)
  {

if(*(Mypath+i)=='\\')
{

   for(;counter<8;counter++)
{
   name[counter]=' ';
}
name[counter]=0;
counter=0;

do
{
   sec_temp=(SOC(Cur_Clust));
   for(iSec=sec_temp;iSecSectorsPerClust;iSec++)
   {

   Rd_Block(iSec, 1, (U32*)FAT32_Buffer);
   Uart_Printf("iSec one of all sectors =%xh\n", iSec);

for(iDir=0;iDirBytesPerSector;iDir+=sizeof(struct direntry))
   {
   pDir=((struct direntry *)(FAT32_Buffer+iDir));
   if(Compare_Dir_Name((INT8*)pDir->deName,(INT8*)name))
   {
        flag=1;

Cur_Clust=pDir->deLowCluster[0]+(pDir->deLowCluster[1]<<8)+(pDir->deHighClust[0]<<16)+(pDir->deHighClust[1]<<24);
iDir=pArg->BytesPerSector;
iSec=sec_temp+pArg->SectorsPerClust;
   }
   }

   }
   Old_Clust=Cur_Clust;
}while(!flag && (Cur_Clust=FAT32_GetNextCluster(Cur_Clust))!=0x0fffffff);

if(!flag)
{
   temp_dir_cluster=Old_Clust;
   strcpy(temp_dir_name,name);
   flag=0;
   free(pDir);
   free(Mypath);
   return 0;
}
flag=0;

}
else
{
name[counter++]=(L2U(*(Mypath+i)));
Uart_Printf("*(Mypath+i)=%xh ,i=%d \n",  *(Mypath+i),i);
}
i++;
  }
}

name[counter]=0;
flag=1;
temp_dir_cluster=Cur_Clust;
strcpy(temp_dir_name,name);

  free(pDir);
  free(Mypath);
return Cur_Clust;
}

而当我把红色的代码屏蔽之后，就没出现数据终止异常。