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nexedi
linux
Commits
b6f6db3e
Commit
b6f6db3e
authored
Feb 28, 2003
by
David Mosberger
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ia64: Add forgotten probe.w.fault checks in fsys_gettimeofday().
parent
b8fcff74
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arch/ia64/kernel/fsys.S
arch/ia64/kernel/fsys.S
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arch/ia64/kernel/fsys.S
View file @
b6f6db3e
...
...
@@ -180,7 +180,7 @@ ENTRY(fsys_gettimeofday)
ldf8
f7
=[
r10
]
//
f7
now
contains
itm_delta
setf.sig
f11
=
r2
nop
0
adds
r10
=
8
,
r32
adds
r20
=
IA64_TIMESPEC_TV_NSEC_OFFSET
,
r19
//
r20
=
&
xtime
->
tv_nsec
movl
r26
=
jiffies
...
...
@@ -192,6 +192,16 @@ ENTRY(fsys_gettimeofday)
movl
r25
=
last_nsec_offset
;;
/
*
*
Verify
that
we
have
permission
to
write
to
struct
timeval
.
Note
:
*
Another
thread
might
unmap
the
mapping
before
we
actually
get
*
to
store
the
result
.
That
's OK as long as the stores are also
*
protect
by
EX
()
.
*/
EX
(.
fail
,
probe.w.fault
r32
,
3
)
//
this
must
come
_after_
NaT
-
check
EX
(.
fail
,
probe.w.fault
r10
,
3
)
//
this
must
come
_after_
NaT
-
check
nop
0
ldf8
f10
=[
r8
]
//
f10
<-
local_cpu_data
->
nsec_per_cyc
value
cmp.ne
p8
,
p0
=
0
,
r9
(
p8
)
br.spnt.many
fsys_fallback_syscall
...
...
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