Hi, I am trying to use the function map_domain_va() in libxc/xc_ptrace.c to map the user-space address of DomU. The prototype of map_domain_va() is as below: void *map_domain_va(int xc_handle, int cpu, void *guest_va, int perm) If the guest_va is address in the kernel-space, everything is fine (of course, we all know that xc_ptrace works well). However, if guest_va is the address in user-space, the function returns sucessfully, but when I tried to access the mapped memory, the information seems to be garbage only. Any hint why this happen? What should I do to fix ths? In my experiment, the user-space address is valid in the context. So the reason that the guest_va address is invalid is out of the question. Thanks a lot, Jun _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel