Author: marcel
Date: Wed Feb 20 03:59:45 2013
New Revision: 247018
URL: http://svnweb.freebsd.org/changeset/base/247018
Log:
MFC r246890:
Close a race relating to setting the PCPU pointer (r13).
Modified:
stable/9/sys/ia64/ia64/syscall.S
Directory Properties:
stable/9/sys/ (props changed)
Modified: stable/9/sys/ia64/ia64/syscall.S
==============================================================================
--- stable/9/sys/ia64/ia64/syscall.S Wed Feb 20 02:40:03 2013
(r247017)
+++ stable/9/sys/ia64/ia64/syscall.S Wed Feb 20 03:59:45 2013
(r247018)
@@ -228,7 +228,7 @@ ENTRY_NOPROFILE(epc_syscall, 8)
{ .mmi
mov r16=ar.rsc
mov ar.rsc=0
- mov r17=r13
+ nop 0
;;
}
{ .mmi
@@ -239,13 +239,13 @@ ENTRY_NOPROFILE(epc_syscall, 8)
;;
}
{ .mmi
- mov r13=ar.k4
+ mov r21=ar.unat
add r30=-SIZEOF_TRAPFRAME,r14
mov r20=sp
;;
}
{ .mii
- mov r21=ar.unat
+ mov r17=r13
dep r30=0,r30,0,10
;;
add sp=-16,r30
@@ -258,10 +258,10 @@ ENTRY_NOPROFILE(epc_syscall, 8)
add r31=8,r30
;;
}
-{ .mii
+{ .mmi
+ mov r13=ar.k4
mov r22=ar.fpsr
sub r29=r14,r30
- nop 0
}
{ .mmi
mov r23=ar.bsp
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