How do I set a software breakpoint on an ARM processor?

Question

How do I do the equivalent of an x86 software interrupt:

asm( \"int $3\" )

on an ARM processor (specifically a Cortex A8) to generate an event

Answer 1

We can use breakpoint inst:

• For A32: use BRK #imm instruction

• For Arm and Thumb: use BKPT #imme instruction.

Or we can use UND pseudo-instruction to generate undefined instruction which will cause exception if processor attempt to execute it.