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From: Marcel Moolenaar <marcel@FreeBSD.org>
To: Perforce Change Reviews <perforce@freebsd.org>
Subject: PERFORCE change 29809 for review
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http://perforce.freebsd.org/chv.cgi?CH=29809

Change 29809 by marcel@marcel_nfs on 2003/04/26 12:52:49

	Delay restoring the stack pointer until after we're done
	with the trapframe and in this case after the loadrs. We
	had a nice "window of pain" in which an exception would
	clobber the stack because we already set the stack pointer
	to that of the process.

Affected files ...

.. //depot/projects/ia64_epc/sys/ia64/ia64/syscall.s#12 edit

Differences ...

==== //depot/projects/ia64_epc/sys/ia64/ia64/syscall.s#12 (text+ko) ====

@@ -406,19 +406,19 @@
 {	.mmi
 	ld8		r19=[r15],16		// pr
 	ld8		r20=[r14],16		// pfs (syscall stub)
-	mov		sp=r16
+	mov		b6=r18
 	;;
 }
 {	.mmi
 	ld8		r21=[r15],24		// bspstore
 	ld8		r22=[r14],24		// rnat
-	mov		b6=r18
+	mov		pr=r19,0x1fffe
 	;;
 }
-{	.mmi
+{	.mmb
 	ld8		r23=[r15],16		// tp
 	ld8		r24=[r14],16		// rsc
-	mov		pr=r19,0x1fffe
+	nop		0
 	;;
 }
 {	.mmi
@@ -427,7 +427,7 @@
 	mov		ar.pfs=r20
 	;;
 }
-{	.mmi
+{	.mmb
 	ld8		gp=[r15],16		// gp
 	ld8		r27=[r14],16		// ndirty
 	nop		0
@@ -439,7 +439,7 @@
 	shl		r27=r27,16
 	;;
 }
-{	.mmi
+{	.mmb
 	ld8		r8=[r15],16		// r8
 	mov		ar.rsc=r27
 	nop		0
@@ -448,13 +448,13 @@
 {	.mmi
 	ld8		r9=[r14]		// r9
 	ld8		r10=[r15]		// r10
-	nop		0
+	dep		r26=-1,r26,19,1		// Set psr.dfh
 	;;
 }
 {	.mmi
 	loadrs
 	mov		r14=ar.k5
-	dep		r26=-1,r26,19,1		// Set psr.dfh
+	mov		sp=r16
 	;;
 }
 {	.mmi