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From: Jung-uk Kim <jkim@FreeBSD.org>
Date: Thu, 29 Jul 2010 16:49:20 +0000 (UTC)
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Subject: svn commit: r210615 - head/sys/amd64/amd64
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Author: jkim
Date: Thu Jul 29 16:49:20 2010
New Revision: 210615
URL: http://svn.freebsd.org/changeset/base/210615

Log:
  Fix another fallout from r208833.  savectx() is used to save CPU context
  for crash dump (dumppcb) and kdb (stoppcbs).  For both cases, there cannot
  have a valid pointer in pcb_save.  This should restore the previous
  behaviour.

Modified:
  head/sys/amd64/amd64/cpu_switch.S

Modified: head/sys/amd64/amd64/cpu_switch.S
==============================================================================
--- head/sys/amd64/amd64/cpu_switch.S	Thu Jul 29 16:41:21 2010	(r210614)
+++ head/sys/amd64/amd64/cpu_switch.S	Thu Jul 29 16:49:20 2010	(r210615)
@@ -347,7 +347,7 @@ ENTRY(savectx)
 	lmsw	%ax
 
 	movq	$PCB_SAVEFPU_SIZE,%rdx	/* arg 3 */
-	movq	PCB_SAVEFPU(%rcx),%rsi	/* arg 2 */
+	leaq	PCB_USERFPU(%rcx),%rsi	/* arg 2 */
 	/* arg 1 (%rdi) already loaded */
 	call	bcopy
 1: