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In exception_save, write-back ar.rnat after switching the backing-

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store. Writing to ar.bspstore is defined to leave ar.rnat undefined.

PR:		ia64/120315
MFC after:	3 days
This commit is contained in:
Marcel Moolenaar 2009-12-08 00:44:23 +00:00
parent 2969bf0e46
commit c4dbd41f5d
1 changed files with 14 additions and 15 deletions
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29
sys/ia64/ia64/exception.S
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@ -228,43 +228,42 @@ exception_save_restart:
(p13) dep r20=r20,r21,0,9 // align dirty registers
;;
}
// r20=bspstore, r22=iip, r23=ipsr
// r19=rnat, r20=bspstore, r22=iip, r23=ipsr
{ .mmi
st8 [r31]=r23,16 // psr
(p13) mov ar.bspstore=r20
nop 0
;;
}
{ .mmi
{ .mmb
(p13) mov ar.rnat=r19
mov r18=ar.bsp
nop 0
;;
}
{ .mmi
mov r19=cr.ifs
st8.spill [r30]=gp,16 // gp
sub r18=r18,r20
;;
}
{ .mmi
st8.spill [r30]=gp,16 // gp
st8 [r31]=r18,16 // ndirty
nop 0
;;
}
// r19=ifs, r22=iip
{ .mmi
{ .mmb
st8 [r31]=r18,16 // ndirty
st8 [r30]=r19,16 // cfm
st8 [r31]=r22,16 // iip
nop 0
;;
}
{ .mmi
st8 [r30]=r17 // ifa
mov r18=cr.isr
st8 [r31]=r22,16 // iip
add r29=16,r30
;;
}
{ .mmi
st8 [r31]=r18 // isr
add r30=8,r29
add r31=16,r29
{ .mmb
st8 [r30]=r17,24 // ifa
st8 [r31]=r18,24 // isr
nop 0
;;
}
{ .mmi