xnu-792.6.61.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 dc80415c42938d16209c9ea80b3f396910988e45..effa74de1d18c89234c4f8a64c7502fd7fb08972 100644 (file)
--- a/osfmk/ppc/atomic_switch.s
+++ b/osfmk/ppc/atomic_switch.s
@@ -104,7 +104,8 @@ 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
@@ -213,7 +214,8 @@ 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