printf on Nios2 not working properly

Hi,

I am working on a custom board with Nios2. I am facing a weird problem with printf.

When I do any printf I am getting an inversed output.

i.e. If I do printf("Hello World"); I get eHll ooWlrd. Take 2 chars from H and reverse. U get the o/p I am getting.

All this is happening in vsprintf which is called by printf for formatting.

Below I will give the code snippet where things are going wrong.

int vsprintf(char *buf, const char *fmt, va_list args)

{

...................

char * str;

...................

for (temp=str=buf ; *fmt ; ++fmt) {

if (*fmt != '%') {

*str++ = *fmt;

continue;

}

.....................

case 's':

s = va_arg(args, char *);

if (!s)

s = "<NULL>";

len = strnlen(s, precision);

if (!(flags & LEFT))

while (len < field_width--)

*str++ = &#39; &#39;;

for (i = 0; i < len ; ++i)

*str++ = *s++;

while (len < field_width--)

*str++ = &#39; &#39;;

continue;

....................

}

for (i = 0; i < len ; ++i)

*str++ = *s++;

This is where every thing goes wrong.

suppose s="Hello from NiosII!" it coppies correctly to str but it appears as mentioned above in buf i.e "eHll oofmoN oiIsI.

Clue:

For loop which is suppose to incerement from 0 to len, actually decrements from len to 0. I beleive it is compiler optimization.