I am investigating using the -G flag to attach gdb to a running guest machine.
It looks like breakpoints and single instruction stepping are not implemented in vmm/amd/svm.c. It seems that it was added to vmm/intel/vmx.c. I spent a little bit of time reading through the AMD64 Architecture Manual; it doesn't seem to provide a direct way to implement this in a way transparent to the guest? One way to implement single stepping that occurs to me is to set the trap flag in the guest's RFLAGS register, and then intercept each #DB exception in the vmm. Has anyone looked at this on the AMD side? Any advice? --- Rob Crowston. _______________________________________________ freebsd-virtualization@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-virtualization To unsubscribe, send any mail to "freebsd-virtualization-unsubscr...@freebsd.org"
