> Yes. I straced gdb to be sure it really does PTRACE_SET_DEBUGREF to > use the hardware watchpoint. > > There is something strange though. gdb does PTRACE_SINGLESTEP and only > then PTRACE_CONT after "watch xxx".
powerpc's data breakpoints are before-access, whereas x86's are after-access. In x86-speak, it's a fault-type exception rather than a trap-type. The only way to actually get the caught load or store to complete is to clear the DABR, single-step, and then restore it. Thanks, Roland
