[PATCH] Add PTRACE_{GET|SET}VRREGS

[Robert C. Jennings]

The ptrace get and set methods for VMX/Altivec registers present in the 
ppc tree were missing for ppc64.  This patch adds the 32-bit and 64-bit 
methods.

Signed-off-by: Robert C Jennings <rcjenn at austin.ibm.com>
---

  ptrace.c   |   18 ++++++++++++++++++
  ptrace32.c |   18 ++++++++++++++++++
  2 files changed, 36 insertions(+)

diff -uprN -X linux-2.6.13/Documentation/dontdiff linux-2.6.13.orig/arch/ppc64/kernel/ptrace32.c linux-2.6.13/arch/ppc64/kernel/ptrace32.c
--- linux-2.6.13.orig/arch/ppc64/kernel/ptrace32.c	2005-08-28 18:41:01.000000000 -0500
+++ linux-2.6.13/arch/ppc64/kernel/ptrace32.c	2005-08-30 11:12:18.000000000 -0500
@@ -408,6 +408,24 @@ int sys32_ptrace(long request, long pid,
         case PTRACE_GETEVENTMSG:
                  ret = put_user(child->ptrace_message, (unsigned int __user *) data);
                  break;
+ 
+#ifdef CONFIG_ALTIVEC
+	case PTRACE_GETVRREGS:
+		/* Get the child altivec register state. */
+		if (copy_to_user((void *)data, &child->thread.vr[0],
+				offsetof(struct thread_struct, used_vr) -
+				offsetof(struct thread_struct, vr[0])))
+			ret = -EFAULT;
+	break;
+
+		case PTRACE_SETVRREGS:
+		/* Set the child altivec register state. */
+		if (copy_from_user(&child->thread.vr[0], (void *)data,
+				offsetof(struct thread_struct, used_vr) -
+				offsetof(struct thread_struct, vr[0])))
+			ret = -EFAULT;
+	break;
+#endif

  	default:
  		ret = ptrace_request(child, request, addr, data);
diff -uprN -X linux-2.6.13/Documentation/dontdiff linux-2.6.13.orig/arch/ppc64/kernel/ptrace.c linux-2.6.13/arch/ppc64/kernel/ptrace.c
--- linux-2.6.13.orig/arch/ppc64/kernel/ptrace.c	2005-08-28 18:41:01.000000000 -0500
+++ linux-2.6.13/arch/ppc64/kernel/ptrace.c	2005-08-30 11:11:59.000000000 -0500
@@ -274,6 +274,24 @@ int sys_ptrace(long request, long pid, l
  		break;
  	}

+#ifdef CONFIG_ALTIVEC
+	case PTRACE_GETVRREGS:
+		/* Get the child altivec register state. */
+		if (copy_to_user((void *)data, &child->thread.vr[0],
+				offsetof(struct thread_struct, used_vr) -
+				offsetof(struct thread_struct, vr[0])))
+			ret = -EFAULT;
+	break;
+
+	case PTRACE_SETVRREGS:
+		/* Set the child altivec register state. */
+		if (copy_from_user(&child->thread.vr[0], (void *)data,
+				offsetof(struct thread_struct, used_vr) -
+				offsetof(struct thread_struct, vr[0])))
+			ret = -EFAULT;
+	break;
+#endif
+
  	default:
  		ret = ptrace_request(child, request, addr, data);
  		break;