Hello, I am new to the GCC code. I want to make a simple modification to the back end. I want to add a debug exception (int3) to be generated before any instance of certain x86 instructions.
I tried to modify gcc/config/i386/i386.md by adding a "int3" to the define_insn for instructions of interest. But that just caused configure to fail (cannot run generated C programs). Any pointers on how to approach this? Also, suggestions for alternative approaches are also welcome. Thanks!
