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> Also, since the ARM architecture doesn't support > h/w single stepping (or does it?), I've #define'd > NO_SINGLE_STEP in tm-arm.h and added the > following single_step() function to arm-tdep.c: > > I'd want to doublecheck that this doesn't interfere with h/w single-step > that's part of adp (rdi) and rdp protocols, but I don't think there's > a problem. Actually, the best solution here is to implement single-step in the stub, and hide any implementation specific details in there, where they are most easily handled. For ARM implementations that don't support hardware single-step, it can be simulated in the stub using breakpoints, which is *much* faster than doing the same via GDB's remote protocol. Stu