ARM ABORT mode problem

Hi there,

Iam using LPC2368 controller and Keil uVision3 IDE with the GNU compiler.
My Stack settings are as follows,

.equ    Top_Stack,      0x40004000
        .equ    UND_Stack_Size, 0x00000008
        .equ    SVC_Stack_Size, 0x00000008
        .equ    ABT_Stack_Size, 0x00000008
        .equ    FIQ_Stack_Size, 0x00000008
        .equ    IRQ_Stack_Size, 0x00000080
        .equ    USR_Stack_Size, 0x00000400

Iam facing the following problems
1. In my main(), I have a the following C statements

save_VicInt1 = VICIntEnable;     //saving int status
VICIntEnClr = 0xFFFFFFFF;        // disable all interrupts

flash_init();   //Initialize  Flash and switch off PLL  with sector n0: 19
flash_read_LMD_data(0x58000 );
flash_uninit();                 //Unnitialize  Flash and switch on PLL

VICIntEnable = save_VicInt1 ;

 if((flash_LMD_data[0] & 0xFFFFFFFF00000000 ) != 0xDDDDDDDD00000000 )
 {
 // Batt_RAM E0084000
 *((volatile long long int *)( Batt_RAM )) = 0x0; //make End of battery
                                                 //memory
  flash_LMD_data[0]=0xDDDDDDDD00000000;

  save_VicInt1 = VICIntEnable;     //saving int status
  VICIntEnClr = 0xFFFFFFFF;        // disable all interrupts

  flash_init();  //Initialize  Flash and switch off PLL with sector n0: 19
  EraseSector (0x00058000);
  ProgramPage(0x00058000, 512 , flash_LMD_data); //writing RTC connfig:
                                                 //data to FLASH

  EraseSector (0x00068000);
  ProgramPage(0x00068000, 512 , flash_LMD_data); //writing RTC connfig:
                                                 //data to FLASH
  EraseSector (0x00070000);
  ProgramPage(0x00070000, 512 , flash_LMD_data); //writing RTC connfig:
                                                 //data to FLASH

  flash_uninit();         //Unnitialize  Flash and switch on PLL
  VICIntEnable = save_VicInt1 ;
 }
 uart_init();
 //read old LMD data from battery ram  and write to FLASH
 copy_battery_to_flash();

 //read all data from Flash and print in UART
 print_LMD_from_flash(0x00058000);
                     // Batt_RAM=       0xE0084000
//make start of battery memory for storing Next set of LMD data from First
*((volatile long long int *)( Batt_RAM )) = 0x0;

//read old data from Flash for configuring  the CAN
save_VicInt1 = VICIntEnable;     //saving int status

VICIntEnClr = 0xFFFFFFFF;        // disable all interrupts

flash_read_LMD_ID(0x70000);   //reading data from flash and put in a buffer
                              //"flash_LMD_ID[4]"
flash_read_sel_CAN_data(0x68000);//reading data from flash and put in a
                                 //buffer "flash_sel_CAN_data_2d[10][2]"
flash_read_RTC_data(0x60000);  //reading data from flash and put in a
                               //buffer "flash_sel_CAN_data_2d[10][2]"

flash_read_transmission_data(0x7B000);   //reading data from flash and put
                   //in a buffer 4 buffers to get ID,DATA,freq,port number

VICIntEnable = save_VicInt1 ;

With the GNU settings for the compiler optimization set to LEVEL 1 the code goes to Abort mode if the last statement in the above code "VICIntEnable = save_VicInt1 ;" is executed. I checked the SP and found it
to be within the defined stack boundary. I got this problem after I added
a buffer "long long int flash_dest_var[2]={0};" in the function "flash_read_transmission_data(0x7B000);"

int flash_read_transmission_data(unsigned long adr)
{
 unsigned long n,i,k=0;
 int data_count=0;
 long long int flash_dest_var[2]={0};

I have tried to increase the stack size but to no avail.
If i declare this buffer "long long int flash_dest_var[2]={0};" globally then, i donot get this problem.
Please kindly suggest a way to debug this problem.

2. In the second case, with the GNU settings for the compiler optimization set to "NO OPTIMIZATION" the code goes to Abort mode if the CPU is executing the function "flash_read_transmission_data(0x7B000);" in which i have declared "long long int flash_dest_var[2]={0};" . I checked the SP and found it to be within the defined stack boundary.

Please help me out with your valuable suggestions.

Also please can anyone brief me about the Optimization options settings which is present for the GNU compiler in the Keil uVision3 IDE.