malloc failure

Hi,

I am using eCos for NiosII. I made my APP and when I am dbugging throuh the App, I found out that malloc call is failing. Initially I thought may be my Application is trying to allocate a big amount of memory. So I tried with a small memory, That also it failed.. After that I just tried a small program:-

int main(void)

{

char *addr1;

addr1 = malloc(200);

if( NULL == addr1 )

{

return 1;

}

printf("Hello, eCos world!!\n");

return 0;

}

Even this one also failed in that malloc. So can anyone please guide me through this? What might be the reason for failing malloc?

Akhil