X-Git-Url: http://git.annexia.org/?a=blobdiff_plain;f=ps%2Fvirt_ps.ml;h=100a298b25675f3aa2436312206874aec09016e8;hb=e5d7794192c60bce0df55741086e8b643a5d8485;hp=41e8af7ab00dd09af3a0eb79e4531eed0c8bce4b;hpb=df3b931012515e3f0e7b741d000f4930dbea0a79;p=virt-mem.git

diff --git a/ps/virt_ps.ml b/ps/virt_ps.ml
index 41e8af7..100a298 100644
--- a/ps/virt_ps.ml
+++ b/ps/virt_ps.ml
@@ -24,9 +24,68 @@ open Virt_mem_utils
 open Virt_mem_types
 
 
+let run debug (image, ksymmap, utsname) =
+  try
+    let { domname = domname } = image in
 
-let run debug ({ mem = mem }, ksymmap, _) =
-  ()
+    let kernel_version =
+      match utsname with
+      | None ->
+	  eprintf (f_"%s: could not guess kernel version\n") domname;
+	  raise Exit
+      | Some { kernel_release = v } -> v in
+
+    if not (Kernel_task_struct.known kernel_version) then (
+      eprintf (f_"%s: %s: unknown kernel version
+Try a newer version of virt-mem, or if the guest is not from a
+supported Linux distribution, see this page about adding support:
+  http://et.redhat.com/~rjones/virt-mem/faq.html\n") domname kernel_version;
+      raise Exit
+    );
+
+    let task_struct_size = Kernel_task_struct.size kernel_version in
+
+    let init_task, init_task_addr =
+      let init_task_addr =
+	try Ksymmap.find "init_task" ksymmap
+	with Not_found ->
+	  eprintf (f_"%s: could not find init_task in kernel image\n") domname;
+	  raise Exit in
+      let addr =
+	(Virt_mem_mmap.unsafe_typed_addr_of_addr init_task_addr :
+	   [ `task_struct ] Virt_mem_mmap.typed_addr) in
+      let init_task = Kernel_task_struct.get kernel_version image.mem addr in
+      init_task, init_task_addr in
+
+    (* Starting at init_task, navigate through the linked list of
+     * tasks (through tasks.next).  Grab each task_struct as we go.
+     *)
+    let tasks, image =
+      let rec loop image acc task =
+	let next = task.Kernel_task_struct.tasks'next in
+	let next_addr = Virt_mem_mmap.unsafe_addr_of_typed_addr next in
+	if next_addr <> init_task_addr then (
+	  let mapped =
+	    Virt_mem_mmap.is_mapped_range image.mem
+	      next_addr task_struct_size in
+	  let image =
+	    if not mapped then load_memory image next_addr task_struct_size
+	    else image in
+	  let task = Kernel_task_struct.get kernel_version image.mem next in
+	  let acc = task :: acc in
+	  loop image acc task
+	) else
+	  acc, image
+      in
+      loop image [] init_task in
+
+    List.iter (
+      fun task ->
+	printf "%S\n" task.Kernel_task_struct.comm
+    ) tasks
+
+  with
+  | Exit -> ()
 
 let summary = s_"list processes in virtual machine"
 let description = s_"\