Is anyone successfully using gdbserver-xen on x86_64 ? I had hoped Xen would be useful for debugging kernel code, but I am getting rather disappointed, particularly with the lack of response from the xen-tools and xen-users mailing lists (this is my third post on this topic). I am trying to use gdbserver-xen to debug a paravirtualised XenoLinux VM (linux-2.6.16.40-xen) on x86_64, but without much success. I recently upgraded xen to 3.1.0_rc10, and get the same results as I was getting with xen 3.0.4 . gdbserver-xen seems to attach to the target kernel okay (although it sometimes prints "unsupported xc_ptrace request PTRACE_SETFPREGS"), but gdb is unable to do much: (gdb) target remote 127.0.0.1:9999 Remote debugging using 127.0.0.1:9999 [New Thread 0] [Switching to Thread 0] 0xffffffff801073aa in hypercall_page () (gdb) bt #0 0xffffffff801073aa in hypercall_page () Cannot access memory at address 0xffffffff80107000 (gdb) continue Continuing. Warning: Cannot insert breakpoint -2. Error accessing memory address 0xffffffff80100000: Input/output error. Does this work for anyone else ? I would appreciate any suggestions. I can supply more information if anyone is interested. Tim _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users