How do I print out a break instruction in MIPS?

Question

I'm new to MIPS programming, and I'm working on a program to become more familiar with exception handling.

When an exception occurs, I print out the address of where the exception occurred, followed by the exception occurred. After these messages print, the program hits a break statement:

break 100

And then terminates the program.

My question is, is there a way I can print out this instruction when it gets hit? What I want to print out would be something like:

*exception address* Cause: *exception type* break 100

Answer 1

Register $14 in coprocessor 0 holds the break code. Load that instruction into memory, then load that word. You need to shift past the first 6 bits to get the break code.

mfc0 $a0, $14   
lw $a0, ($a0)
srl $a0, $a0, 6 
li $v0, 1   
syscall