xnu-1228.tar.gz

[apple/xnu.git] / osfmk / ppc / atomic_switch.s

diff --git a/osfmk/ppc/atomic_switch.s b/osfmk/ppc/atomic_switch.s
index 75d89bc8920f2222aa6b2a1172b660bcfabfffbe..ef1edd940bb1a53f3ba0bcb834746cd4f344b1dd 100644 (file)
--- a/osfmk/ppc/atomic_switch.s
+++ b/osfmk/ppc/atomic_switch.s
@@ -1,16 +1,19 @@
 /*
  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
  *
- * @APPLE_LICENSE_HEADER_START@
- * 
- * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
  * 
  * This file contains Original Code and/or Modifications of Original Code
  * as defined in and that are subject to the Apple Public Source License
  * Version 2.0 (the 'License'). You may not use this file except in
- * compliance with the License. Please obtain a copy of the License at
- * http://www.opensource.apple.com/apsl/ and read it before using this
- * file.
+ * compliance with the License. The rights granted to you under the License
+ * may not be used to create, or enable the creation or redistribution of,
+ * unlawful or unlicensed copies of an Apple operating system, or to
+ * circumvent, violate, or enable the circumvention or violation of, any
+ * terms of an Apple operating system software license agreement.
+ * 
+ * Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this file.
  * 
  * The Original Code and all software distributed under the License are
  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
@@ -20,7 +23,7 @@
  * Please see the License for the specific language governing rights and
  * limitations under the License.
  * 
- * @APPLE_LICENSE_HEADER_END@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  */
 #include       <ppc/asm.h>
 #include       <ppc/proc_reg.h>
@@ -107,7 +110,8 @@ ENTRY(atomic_switch_trap, TAG_NO_FRAME_USED)
 
 .L_CallPseudoKernel:
 
-                       mfsprg  r2,0                                                            ; Get the per_proc
+                       mfsprg  r2,1                                                            ; Get the current activation
+                       lwz             r2,ACT_PER_PROC(r2)                                     ; Get the per_proc block
                        rlwinm  r6,r26,0,0,19                                           ; Start of page is bttd
                        lwz             r7,ACT_MACT_SPF(r13)                            ; Get special flags 
                        lwz             r1,BTTD_INTERRUPT_VECTOR(r6)            ; Get interrupt vector
@@ -216,7 +220,8 @@ ENTRY(atomic_switch_trap, TAG_NO_FRAME_USED)
                        stw             r1,savecr(r4)                                           ; Update CR
 
 .L_ExitFromPreemptiveThread:
-                       mfsprg  r3,0                                                            ; Get the per_proc
+                       mfsprg  r3,1                                                            ; Get the current activation
+                       lwz             r3,ACT_PER_PROC(r3)                                     ; Get the per_proc block
                        lwz             r2,savesrr1+4(r4)                                       ; Get current MSR       
                        lwz             r1,BEDA_SRR1(r26)                                       ; Get new MSR
                        stw             r7,ACT_MACT_SPF(r13)                            ; Update special flags