Find which assembly instruction caused an Illegal Instruction error without debugging

Question

While running a program I\'ve written in assembly, I get Illegal instruction error. Is there a way to know which instruction is causing the error, without debug

Answer 1

For handwritten assembly I would suspect a stack management problem resulting in a return-to-nowhere. Write a debugging printout routine that saves every register and insert a call to it at the top of every function.

Then you will see how far you get...

(BTW, a good editor and a good understanding of the assembler's macro syntax are lifesavers when writing machine code.)