On Thu, Aug 20, 2009 at 03:57:28AM -0700, Dmitry Afanasyev wrote: > Hello! > > I need to get physical memory address from virtual and read some data by it > from /dev/mem. Does kvm_physaddr from libkvm can help me? > > For example, I have a pointer of type int and it points to 5. If I translate > that pointer address to physical address by kvm_physaddr and read from > /dev/mem with physical address as shift in /dev/mem do I get 5?
Yes. This is essentially what mdb does for its physical memory debugging APIs, so you can demonstrate the above using ::vtop and "\" (format from physical instead of virtual) to see this. I'll pick the symbol "rootfs" which is a struct but begins with a well-known string: # mdb -k ... > rootfs/s rootfs: rootfs: zfs > rootfs::vtop virtual fffffffffbc00f48 mapped to physical a400f48 > a400f48\s 0xa400f48: zfs -Mike -- Mike Shapiro, Sun Microsystems Open Storage / Fishworks. blogs.sun.com/mws/ _______________________________________________ opensolaris-code mailing list opensolaris-code@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/opensolaris-code
