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Re: Division by zero in _exit of libnosys
On 2/10/07, Jie Zhang <jzhang918@gmail.com> wrote:
We have to find another way to do that. How about the below method?
#ifdef __BFIN__
asm ("excpt 0;");
#else
/* Default stub just causes a divide by 0 exception. */
int x = rc / INT_MAX;
x = 4 / x;
#endif
Paolo suggested using an asm to prevent gcc from optimizing away the
division by zero:
http://gcc.gnu.org/ml/gcc/2007-02/msg00200.html
So the above code snippet now looks like:
#ifdef __BFIN__
asm ("excpt 0;");
#else
/* Default stub just causes a divide by 0 exception. */
int x = rc / INT_MAX;
x = 4 / x;
asm volatile ("" : : "r" (x));
#endif
Jie