Debugging with GDB

• Debugging with GDB

• GDB@wiki（GNU Debugger）
  GDB is a portable debugger that runs on many Unix-like systems and works for many programming languages.

• The GNU Project Debugger

• The ten secrets of embedded debugging

• How to debug embedded systems?

SIGFPE

• FPE: floating-point exception.
  The SIGFPE signal is sent to a process when it executes an erroneous arithmetic operation, such as division by zero.
  被零除 就是一个典型的 SIGFPE。
  
  all1-all2可能为零
  
  
  确保不被零除
• C Programming Tutorial: Logical Operators;

Terminate (core dump)，Erroneous arithmetic operation