On Thu, 10 Jun 2004, David Daney wrote: > It appears that gcc configured for mipsel-linux will execute a "break 7" > instruction on integer division by zero. > > This causes the kernel (I am using 2.4.25) to send SIGTRAP. It looks like you have a problem in your configuration. A "break 7" (or "teq <divisor>,$zero,7" -- but that's currently implemented in gas only) is indeed emitted and exectuted in the case of division by zero, but Linux has the ability to recognize this special break code and sends SIGFPE instead. There are actually two special codes defined, the other being "6" for an overflow. Both are handled by Linux, with si_code in struct siginfo being set to FPE_INTDIV or FPE_INTOVF, respectively. You can handle this appropriately in a signal handler. -- + Maciej W. Rozycki, Technical University of Gdansk, Poland + +--------------------------------------------------------------+ + e-mail: macro@xxxxxxxxxxxxx, PGP key available +
