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SmartisanOS_Kernel_Source/kernel/compat.c at master · noogeny/SmartisanOS_Kernel_Source · GitHub
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/*
* linux/kernel/compat.c
*
* Kernel compatibililty routines for e.g. 32 bit syscall support
* on 64 bit kernels.
*
* Copyright (C) 2002-2003 Stephen Rothwell, IBM Corporation
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include
<linux/linkage.h>
#include
<linux/compat.h>
#include
<linux/errno.h>
#include
<linux/time.h>
#include
<linux/signal.h>
#include
<linux/sched.h>
/* for MAX_SCHEDULE_TIMEOUT */
#include
<linux/syscalls.h>
#include
<linux/unistd.h>
#include
<linux/security.h>
#include
<linux/timex.h>
#include
<linux/export.h>
#include
<linux/migrate.h>
#include
<linux/posix-timers.h>
#include
<linux/times.h>
#include
<linux/ptrace.h>
#include
<linux/gfp.h>
#include
<asm/uaccess.h>
/*
* Get/set struct timeval with struct timespec on the native side
*/
static
int
compat_get_timeval_convert
(
struct
timespec
*
o
,
struct
compat_timeval
__user
*
i
)
{
long
usec
;
if
(
get_user
(
o
->
tv_sec
,
&
i
->
tv_sec
)
||
get_user
(
usec
,
&
i
->
tv_usec
))
return
-
EFAULT
;
o
->
tv_nsec
=
usec
*
1000
;
return
0
;
}
static
int
compat_put_timeval_convert
(
struct
compat_timeval
__user
*
o
,
struct
timeval
*
i
)
{
return
(
put_user
(
i
->
tv_sec
,
&
o
->
tv_sec
)
||
put_user
(
i
->
tv_usec
,
&
o
->
tv_usec
)) ?
-
EFAULT
:
0
;
}
static
int
compat_get_timex
(
struct
timex
*
txc
,
struct
compat_timex
__user
*
utp
)
{
memset
(
txc
,
0
,
sizeof
(
struct
timex
));
if
(!
access_ok
(
VERIFY_READ
,
utp
,
sizeof
(
struct
compat_timex
))
||
__get_user
(
txc
->
modes
,
&
utp
->
modes
)
||
__get_user
(
txc
->
offset
,
&
utp
->
offset
)
||
__get_user
(
txc
->
freq
,
&
utp
->
freq
)
||
__get_user
(
txc
->
maxerror
,
&
utp
->
maxerror
)
||
__get_user
(
txc
->
esterror
,
&
utp
->
esterror
)
||
__get_user
(
txc
->
status
,
&
utp
->
status
)
||
__get_user
(
txc
->
constant
,
&
utp
->
constant
)
||
__get_user
(
txc
->
precision
,
&
utp
->
precision
)
||
__get_user
(
txc
->
tolerance
,
&
utp
->
tolerance
)
||
__get_user
(
txc
->
time
.
tv_sec
,
&
utp
->
time
.
tv_sec
)
||
__get_user
(
txc
->
time
.
tv_usec
,
&
utp
->
time
.
tv_usec
)
||
__get_user
(
txc
->
tick
,
&
utp
->
tick
)
||
__get_user
(
txc
->
ppsfreq
,
&
utp
->
ppsfreq
)
||
__get_user
(
txc
->
jitter
,
&
utp
->
jitter
)
||
__get_user
(
txc
->
shift
,
&
utp
->
shift
)
||
__get_user
(
txc
->
stabil
,
&
utp
->
stabil
)
||
__get_user
(
txc
->
jitcnt
,
&
utp
->
jitcnt
)
||
__get_user
(
txc
->
calcnt
,
&
utp
->
calcnt
)
||
__get_user
(
txc
->
errcnt
,
&
utp
->
errcnt
)
||
__get_user
(
txc
->
stbcnt
,
&
utp
->
stbcnt
))
return
-
EFAULT
;
return
0
;
}
static
int
compat_put_timex
(
struct
compat_timex
__user
*
utp
,
struct
timex
*
txc
)
{
if
(!
access_ok
(
VERIFY_WRITE
,
utp
,
sizeof
(
struct
compat_timex
))
||
__put_user
(
txc
->
modes
,
&
utp
->
modes
)
||
__put_user
(
txc
->
offset
,
&
utp
->
offset
)
||
__put_user
(
txc
->
freq
,
&
utp
->
freq
)
||
__put_user
(
txc
->
maxerror
,
&
utp
->
maxerror
)
||
__put_user
(
txc
->
esterror
,
&
utp
->
esterror
)
||
__put_user
(
txc
->
status
,
&
utp
->
status
)
||
__put_user
(
txc
->
constant
,
&
utp
->
constant
)
||
__put_user
(
txc
->
precision
,
&
utp
->
precision
)
||
__put_user
(
txc
->
tolerance
,
&
utp
->
tolerance
)
||
__put_user
(
txc
->
time
.
tv_sec
,
&
utp
->
time
.
tv_sec
)
||
__put_user
(
txc
->
time
.
tv_usec
,
&
utp
->
time
.
tv_usec
)
||
__put_user
(
txc
->
tick
,
&
utp
->
tick
)
||
__put_user
(
txc
->
ppsfreq
,
&
utp
->
ppsfreq
)
||
__put_user
(
txc
->
jitter
,
&
utp
->
jitter
)
||
__put_user
(
txc
->
shift
,
&
utp
->
shift
)
||
__put_user
(
txc
->
stabil
,
&
utp
->
stabil
)
||
__put_user
(
txc
->
jitcnt
,
&
utp
->
jitcnt
)
||
__put_user
(
txc
->
calcnt
,
&
utp
->
calcnt
)
||
__put_user
(
txc
->
errcnt
,
&
utp
->
errcnt
)
||
__put_user
(
txc
->
stbcnt
,
&
utp
->
stbcnt
)
||
__put_user
(
txc
->
tai
,
&
utp
->
tai
))
return
-
EFAULT
;
return
0
;
}
asmlinkage
long
compat_sys_gettimeofday
(
struct
compat_timeval
__user
*
tv
,
struct
timezone
__user
*
tz
)
{
if
(
tv
) {
struct
timeval
ktv
;
do_gettimeofday
(
&
ktv
);
if
(
compat_put_timeval_convert
(
tv
,
&
ktv
))
return
-
EFAULT
;
}
if
(
tz
) {
if
(
copy_to_user
(
tz
,
&
sys_tz
,
sizeof
(
sys_tz
)))
return
-
EFAULT
;
}
return
0
;
}
asmlinkage
long
compat_sys_settimeofday
(
struct
compat_timeval
__user
*
tv
,
struct
timezone
__user
*
tz
)
{
struct
timespec
kts
;
struct
timezone
ktz
;
if
(
tv
) {
if
(
compat_get_timeval_convert
(
&
kts
,
tv
))
return
-
EFAULT
;
}
if
(
tz
) {
if
(
copy_from_user
(
&
ktz
,
tz
,
sizeof
(
ktz
)))
return
-
EFAULT
;
}
return
do_sys_settimeofday
(
tv
?
&
kts
:
NULL
,
tz
?
&
ktz
:
NULL
);
}
int
get_compat_timeval
(
struct
timeval
*
tv
,
const
struct
compat_timeval
__user
*
ctv
)
{
return
(!
access_ok
(
VERIFY_READ
,
ctv
,
sizeof
(
*
ctv
))
||
__get_user
(
tv
->
tv_sec
,
&
ctv
->
tv_sec
)
||
__get_user
(
tv
->
tv_usec
,
&
ctv
->
tv_usec
)) ?
-
EFAULT
:
0
;
}
EXPORT_SYMBOL_GPL
(
get_compat_timeval
);
int
put_compat_timeval
(
const
struct
timeval
*
tv
,
struct
compat_timeval
__user
*
ctv
)
{
return
(!
access_ok
(
VERIFY_WRITE
,
ctv
,
sizeof
(
*
ctv
))
||
__put_user
(
tv
->
tv_sec
,
&
ctv
->
tv_sec
)
||
__put_user
(
tv
->
tv_usec
,
&
ctv
->
tv_usec
)) ?
-
EFAULT
:
0
;
}
EXPORT_SYMBOL_GPL
(
put_compat_timeval
);
int
get_compat_timespec
(
struct
timespec
*
ts
,
const
struct
compat_timespec
__user
*
cts
)
{
return
(!
access_ok
(
VERIFY_READ
,
cts
,
sizeof
(
*
cts
))
||
__get_user
(
ts
->
tv_sec
,
&
cts
->
tv_sec
)
||
__get_user
(
ts
->
tv_nsec
,
&
cts
->
tv_nsec
)) ?
-
EFAULT
:
0
;
}
EXPORT_SYMBOL_GPL
(
get_compat_timespec
);
int
put_compat_timespec
(
const
struct
timespec
*
ts
,
struct
compat_timespec
__user
*
cts
)
{
return
(!
access_ok
(
VERIFY_WRITE
,
cts
,
sizeof
(
*
cts
))
||
__put_user
(
ts
->
tv_sec
,
&
cts
->
tv_sec
)
||
__put_user
(
ts
->
tv_nsec
,
&
cts
->
tv_nsec
)) ?
-
EFAULT
:
0
;
}
EXPORT_SYMBOL_GPL
(
put_compat_timespec
);
int
compat_get_timeval
(
struct
timeval
*
tv
,
const
void
__user
*
utv
)
{
if
(
COMPAT_USE_64BIT_TIME
)
return
copy_from_user
(
tv
,
utv
,
sizeof
*
tv
) ?
-
EFAULT
:
0
;
else
return
get_compat_timeval
(
tv
,
utv
);
}
EXPORT_SYMBOL_GPL
(
compat_get_timeval
);
int
compat_put_timeval
(
const
struct
timeval
*
tv
,
void
__user
*
utv
)
{
if
(
COMPAT_USE_64BIT_TIME
)
return
copy_to_user
(
utv
,
tv
,
sizeof
*
tv
) ?
-
EFAULT
:
0
;
else
return
put_compat_timeval
(
tv
,
utv
);
}
EXPORT_SYMBOL_GPL
(
compat_put_timeval
);
int
compat_get_timespec
(
struct
timespec
*
ts
,
const
void
__user
*
uts
)
{
if
(
COMPAT_USE_64BIT_TIME
)
return
copy_from_user
(
ts
,
uts
,
sizeof
*
ts
) ?
-
EFAULT
:
0
;
else
return
get_compat_timespec
(
ts
,
uts
);
}
EXPORT_SYMBOL_GPL
(
compat_get_timespec
);
int
compat_put_timespec
(
const
struct
timespec
*
ts
,
void
__user
*
uts
)
{
if
(
COMPAT_USE_64BIT_TIME
)
return
copy_to_user
(
uts
,
ts
,
sizeof
*
ts
) ?
-
EFAULT
:
0
;
else
return
put_compat_timespec
(
ts
,
uts
);
}
EXPORT_SYMBOL_GPL
(
compat_put_timespec
);
static
long
compat_nanosleep_restart
(
struct
restart_block
*
restart
)
{
struct
compat_timespec
__user
*
rmtp
;
struct
timespec
rmt
;
mm_segment_t
oldfs
;
long
ret
;
restart
->
nanosleep
.
rmtp
=
(
struct
timespec
__user
*
)
&
rmt
;
oldfs
=
get_fs
();
set_fs
(
KERNEL_DS
);
ret
=
hrtimer_nanosleep_restart
(
restart
);
set_fs
(
oldfs
);
if
(
ret
) {
rmtp
=
restart
->
nanosleep
.
compat_rmtp
;
if
(
rmtp
&&
put_compat_timespec
(
&
rmt
,
rmtp
))
return
-
EFAULT
;
}
return
ret
;
}
asmlinkage
long
compat_sys_nanosleep
(
struct
compat_timespec
__user
*
rqtp
,
struct
compat_timespec
__user
*
rmtp
)
{
struct
timespec
tu
,
rmt
;
mm_segment_t
oldfs
;
long
ret
;
if
(
get_compat_timespec
(
&
tu
,
rqtp
))
return
-
EFAULT
;
if
(!
timespec_valid
(
&
tu
))
return
-
EINVAL
;
oldfs
=
get_fs
();
set_fs
(
KERNEL_DS
);
ret
=
hrtimer_nanosleep
(
&
tu
,
rmtp
? (
struct
timespec
__user
*
)
&
rmt
:
NULL
,
HRTIMER_MODE_REL
,
CLOCK_MONOTONIC
);
set_fs
(
oldfs
);
if
(
ret
) {
struct
restart_block
*
restart
=
&
current_thread_info
()
->
restart_block
;
restart
->
fn
=
compat_nanosleep_restart
;
restart
->
nanosleep
.
compat_rmtp
=
rmtp
;
if
(
rmtp
&&
put_compat_timespec
(
&
rmt
,
rmtp
))
return
-
EFAULT
;
}
return
ret
;
}
static
inline
long
get_compat_itimerval
(
struct
itimerval
*
o
,
struct
compat_itimerval
__user
*
i
)
{
return
(!
access_ok
(
VERIFY_READ
,
i
,
sizeof
(
*
i
))
||
(
__get_user
(
o
->
it_interval
.
tv_sec
,
&
i
->
it_interval
.
tv_sec
) |
__get_user
(
o
->
it_interval
.
tv_usec
,
&
i
->
it_interval
.
tv_usec
) |
__get_user
(
o
->
it_value
.
tv_sec
,
&
i
->
it_value
.
tv_sec
) |
__get_user
(
o
->
it_value
.
tv_usec
,
&
i
->
it_value
.
tv_usec
)));
}
static
inline
long
put_compat_itimerval
(
struct
compat_itimerval
__user
*
o
,
struct
itimerval
*
i
)
{
return
(!
access_ok
(
VERIFY_WRITE
,
o
,
sizeof
(
*
o
))
||
(
__put_user
(
i
->
it_interval
.
tv_sec
,
&
o
->
it_interval
.
tv_sec
) |
__put_user
(
i
->
it_interval
.
tv_usec
,
&
o
->
it_interval
.
tv_usec
) |
__put_user
(
i
->
it_value
.
tv_sec
,
&
o
->
it_value
.
tv_sec
) |
__put_user
(
i
->
it_value
.
tv_usec
,
&
o
->
it_value
.
tv_usec
)));
}
asmlinkage
long
compat_sys_getitimer
(
int
which
,
struct
compat_itimerval
__user
*
it
)
{
struct
itimerval
kit
;
int
error
;
error
=
do_getitimer
(
which
,
&
kit
);
if
(!
error
&&
put_compat_itimerval
(
it
,
&
kit
))
error
=
-
EFAULT
;
return
error
;
}
asmlinkage
long
compat_sys_setitimer
(
int
which
,
struct
compat_itimerval
__user
*
in
,
struct
compat_itimerval
__user
*
out
)
{
struct
itimerval
kin
,
kout
;
int
error
;
if
(
in
) {
if
(
get_compat_itimerval
(
&
kin
,
in
))
return
-
EFAULT
;
}
else
memset
(
&
kin
,
0
,
sizeof
(
kin
));
error
=
do_setitimer
(
which
,
&
kin
,
out
?
&
kout
:
NULL
);
if
(
error
||
!
out
)
return
error
;
if
(
put_compat_itimerval
(
out
,
&
kout
))
return
-
EFAULT
;
return
0
;
}
static
compat_clock_t
clock_t_to_compat_clock_t
(
clock_t
x
)
{
return
compat_jiffies_to_clock_t
(
clock_t_to_jiffies
(
x
));
}
asmlinkage
long
compat_sys_times
(
struct
compat_tms
__user
*
tbuf
)
{
if
(
tbuf
) {
struct
tms
tms
;
struct
compat_tms
tmp
;
do_sys_times
(
&
tms
);
/* Convert our struct tms to the compat version. */
tmp
.
tms_utime
=
clock_t_to_compat_clock_t
(
tms
.
tms_utime
);
tmp
.
tms_stime
=
clock_t_to_compat_clock_t
(
tms
.
tms_stime
);
tmp
.
tms_cutime
=
clock_t_to_compat_clock_t
(
tms
.
tms_cutime
);
tmp
.
tms_cstime
=
clock_t_to_compat_clock_t
(
tms
.
tms_cstime
);
if
(
copy_to_user
(
tbuf
,
&
tmp
,
sizeof
(
tmp
)))
return
-
EFAULT
;
}
force_successful_syscall_return
();
return
compat_jiffies_to_clock_t
(
jiffies
);
}
#ifdef
__ARCH_WANT_SYS_SIGPENDING
/*
* Assumption: old_sigset_t and compat_old_sigset_t are both
* types that can be passed to put_user()/get_user().
*/
asmlinkage
long
compat_sys_sigpending
(
compat_old_sigset_t
__user
*
set
)
{
old_sigset_t
s
;
long
ret
;
mm_segment_t
old_fs
=
get_fs
();
set_fs
(
KERNEL_DS
);
ret
=
sys_sigpending
((
old_sigset_t
__user
*
)
&
s
);
set_fs
(
old_fs
);
if
(
ret
==
0
)
ret
=
put_user
(
s
,
set
);
return
ret
;
}
#endif
#ifdef
__ARCH_WANT_SYS_SIGPROCMASK
/*
* sys_sigprocmask SIG_SETMASK sets the first (compat) word of the
* blocked set of signals to the supplied signal set
*/
static
inline
void
compat_sig_setmask
(
sigset_t
*
blocked
,
compat_sigset_word
set
)
{
memcpy
(
blocked
->
sig
,
&
set
,
sizeof
(
set
));
}
asmlinkage
long
compat_sys_sigprocmask
(
int
how
,
compat_old_sigset_t
__user
*
nset
,
compat_old_sigset_t
__user
*
oset
)
{
old_sigset_t
old_set
,
new_set
;
sigset_t
new_blocked
;
old_set
=
current
->
blocked
.
sig
[
0
];
if
(
nset
) {
if
(
get_user
(
new_set
,
nset
))
return
-
EFAULT
;
new_set
&= ~(
sigmask
(
SIGKILL
) |
sigmask
(
SIGSTOP
));
new_blocked
=
current
->
blocked
;
switch
(
how
) {
case
SIG_BLOCK
:
sigaddsetmask
(
&
new_blocked
,
new_set
);
break
;
case
SIG_UNBLOCK
:
sigdelsetmask
(
&
new_blocked
,
new_set
);
break
;
case
SIG_SETMASK
:
compat_sig_setmask
(
&
new_blocked
,
new_set
);
break
;
default
:
return
-
EINVAL
;
}
set_current_blocked
(
&
new_blocked
);
}
if
(
oset
) {
if
(
put_user
(
old_set
,
oset
))
return
-
EFAULT
;
}
return
0
;
}
#endif
asmlinkage
long
compat_sys_setrlimit
(
unsigned
int
resource
,
struct
compat_rlimit
__user
*
rlim
)
{
struct
rlimit
r
;
if
(!
access_ok
(
VERIFY_READ
,
rlim
,
sizeof
(
*
rlim
))
||
__get_user
(
r
.
rlim_cur
,
&
rlim
->
rlim_cur
)
||
__get_user
(
r
.
rlim_max
,
&
rlim
->
rlim_max
))
return
-
EFAULT
;
if
(
r
.
rlim_cur
==
COMPAT_RLIM_INFINITY
)
r
.
rlim_cur
=
RLIM_INFINITY
;
if
(
r
.
rlim_max
==
COMPAT_RLIM_INFINITY
)
r
.
rlim_max
=
RLIM_INFINITY
;
return
do_prlimit
(
current
,
resource
,
&
r
,
NULL
);
}
#ifdef
COMPAT_RLIM_OLD_INFINITY
asmlinkage
long
compat_sys_old_getrlimit
(
unsigned
int
resource
,
struct
compat_rlimit
__user
*
rlim
)
{
struct
rlimit
r
;
int
ret
;
mm_segment_t
old_fs
=
get_fs
();
set_fs
(
KERNEL_DS
);
ret
=
sys_old_getrlimit
(
resource
,
&
r
);
set_fs
(
old_fs
);
if
(!
ret
) {
if
(
r
.
rlim_cur
>
COMPAT_RLIM_OLD_INFINITY
)
r
.
rlim_cur
=
COMPAT_RLIM_INFINITY
;
if
(
r
.
rlim_max
>
COMPAT_RLIM_OLD_INFINITY
)
r
.
rlim_max
=
COMPAT_RLIM_INFINITY
;
if
(!
access_ok
(
VERIFY_WRITE
,
rlim
,
sizeof
(
*
rlim
))
||
__put_user
(
r
.
rlim_cur
,
&
rlim
->
rlim_cur
)
||
__put_user
(
r
.
rlim_max
,
&
rlim
->
rlim_max
))
return
-
EFAULT
;
}
return
ret
;
}
#endif
asmlinkage
long
compat_sys_getrlimit
(
unsigned
int
resource
,
struct
compat_rlimit
__user
*
rlim
)
{
struct
rlimit
r
;
int
ret
;
ret
=
do_prlimit
(
current
,
resource
,
NULL
,
&
r
);
if
(!
ret
) {
if
(
r
.
rlim_cur
>
COMPAT_RLIM_INFINITY
)
r
.
rlim_cur
=
COMPAT_RLIM_INFINITY
;
if
(
r
.
rlim_max
>
COMPAT_RLIM_INFINITY
)
r
.
rlim_max
=
COMPAT_RLIM_INFINITY
;
if
(!
access_ok
(
VERIFY_WRITE
,
rlim
,
sizeof
(
*
rlim
))
||
__put_user
(
r
.
rlim_cur
,
&
rlim
->
rlim_cur
)
||
__put_user
(
r
.
rlim_max
,
&
rlim
->
rlim_max
))
return
-
EFAULT
;
}
return
ret
;
}
int
put_compat_rusage
(
const
struct
rusage
*
r
,
struct
compat_rusage
__user
*
ru
)
{
if
(!
access_ok
(
VERIFY_WRITE
,
ru
,
sizeof
(
*
ru
))
||
__put_user
(
r
->
ru_utime
.
tv_sec
,
&
ru
->
ru_utime
.
tv_sec
)
||
__put_user
(
r
->
ru_utime
.
tv_usec
,
&
ru
->
ru_utime
.
tv_usec
)
||
__put_user
(
r
->
ru_stime
.
tv_sec
,
&
ru
->
ru_stime
.
tv_sec
)
||
__put_user
(
r
->
ru_stime
.
tv_usec
,
&
ru
->
ru_stime
.
tv_usec
)
||
__put_user
(
r
->
ru_maxrss
,
&
ru
->
ru_maxrss
)
||
__put_user
(
r
->
ru_ixrss
,
&
ru
->
ru_ixrss
)
||
__put_user
(
r
->
ru_idrss
,
&
ru
->
ru_idrss
)
||
__put_user
(
r
->
ru_isrss
,
&
ru
->
ru_isrss
)
||
__put_user
(
r
->
ru_minflt
,
&
ru
->
ru_minflt
)
||
__put_user
(
r
->
ru_majflt
,
&
ru
->
ru_majflt
)
||
__put_user
(
r
->
ru_nswap
,
&
ru
->
ru_nswap
)
||
__put_user
(
r
->
ru_inblock
,
&
ru
->
ru_inblock
)
||
__put_user
(
r
->
ru_oublock
,
&
ru
->
ru_oublock
)
||
__put_user
(
r
->
ru_msgsnd
,
&
ru
->
ru_msgsnd
)
||
__put_user
(
r
->
ru_msgrcv
,
&
ru
->
ru_msgrcv
)
||
__put_user
(
r
->
ru_nsignals
,
&
ru
->
ru_nsignals
)
||
__put_user
(
r
->
ru_nvcsw
,
&
ru
->
ru_nvcsw
)
||
__put_user
(
r
->
ru_nivcsw
,
&
ru
->
ru_nivcsw
))
return
-
EFAULT
;
return
0
;
}
asmlinkage
long
compat_sys_getrusage
(
int
who
,
struct
compat_rusage
__user
*
ru
)
{
struct
rusage
r
;
int
ret
;
mm_segment_t
old_fs
=
get_fs
();
set_fs
(
KERNEL_DS
);
ret
=
sys_getrusage
(
who
, (
struct
rusage
__user
*
)
&
r
);
set_fs
(
old_fs
);
if
(
ret
)
return
ret
;
if
(
put_compat_rusage
(
&
r
,
ru
))
return
-
EFAULT
;
return
0
;
}
asmlinkage
long
compat_sys_wait4
(
compat_pid_t
pid
,
compat_uint_t
__user
*
stat_addr
,
int
options
,
struct
compat_rusage
__user
*
ru
)
{
if
(!
ru
) {
return
sys_wait4
(
pid
,
stat_addr
,
options
,
NULL
);
}
else
{
struct
rusage
r
;
int
ret
;
unsigned
int
status
;
mm_segment_t
old_fs
=
get_fs
();
set_fs
(
KERNEL_DS
);
ret
=
sys_wait4
(
pid
,
(
stat_addr
?
(
unsigned
int
__user
*
)
&
status
:
NULL
),
options
, (
struct
rusage
__user
*
)
&
r
);
set_fs
(
old_fs
);
if
(
ret
>
0
) {
if
(
put_compat_rusage
(
&
r
,
ru
))
return
-
EFAULT
;
if
(
stat_addr
&&
put_user
(
status
,
stat_addr
))
return
-
EFAULT
;
}
return
ret
;
}
}
asmlinkage
long
compat_sys_waitid
(
int
which
,
compat_pid_t
pid
,
struct
compat_siginfo
__user
*
uinfo
,
int
options
,
struct
compat_rusage
__user
*
uru
)
{
siginfo_t
info
;
struct
rusage
ru
;
long
ret
;
mm_segment_t
old_fs
=
get_fs
();
memset
(
&
info
,
0
,
sizeof
(
info
));
set_fs
(
KERNEL_DS
);
ret
=
sys_waitid
(
which
,
pid
, (
siginfo_t
__user
*
)
&
info
,
options
,
uru
? (
struct
rusage
__user
*
)
&
ru
:
NULL
);
set_fs
(
old_fs
);
if
((
ret
<
0
)
||
(
info
.
si_signo
==
0
))
return
ret
;
if
(
uru
) {
ret
=
put_compat_rusage
(
&
ru
,
uru
);
if
(
ret
)
return
ret
;
}
BUG_ON
(
info
.
si_code
&
__SI_MASK
);
info
.
si_code
|=
__SI_CHLD
;
return
copy_siginfo_to_user32
(
uinfo
,
&
info
);
}
static
int
compat_get_user_cpu_mask
(
compat_ulong_t
__user
*
user_mask_ptr
,
unsigned
len
,
struct
cpumask
*
new_mask
)
{
unsigned long
*
k
;
if
(
len
<
cpumask_size
())
memset
(
new_mask
,
0
,
cpumask_size
());
else
if
(
len
>
cpumask_size
())
len
=
cpumask_size
();
k
=
cpumask_bits
(
new_mask
);
return
compat_get_bitmap
(
k
,
user_mask_ptr
,
len
*
8
);
}
asmlinkage
long
compat_sys_sched_setaffinity
(
compat_pid_t
pid
,
unsigned
int
len
,
compat_ulong_t
__user
*
user_mask_ptr
)
{
cpumask_var_t
new_mask
;
int
retval
;
if
(!
alloc_cpumask_var
(
&
new_mask
,
GFP_KERNEL
))
return
-
ENOMEM
;
retval
=
compat_get_user_cpu_mask
(
user_mask_ptr
,
len
,
new_mask
);
if
(
retval
)
goto
out
;
retval
=
sched_setaffinity
(
pid
,
new_mask
);
out
:
free_cpumask_var
(
new_mask
);
return
retval
;
}
asmlinkage
long
compat_sys_sched_getaffinity
(
compat_pid_t
pid
,
unsigned
int
len
,
compat_ulong_t
__user
*
user_mask_ptr
)
{
int
ret
;
cpumask_var_t
mask
;
if
((
len
*
BITS_PER_BYTE
)
<
nr_cpu_ids
)
return
-
EINVAL
;
if
(
len
&
(
sizeof
(
compat_ulong_t
)
-
1
))
return
-
EINVAL
;
if
(!
alloc_cpumask_var
(
&
mask
,
GFP_KERNEL
))
return
-
ENOMEM
;
ret
=
sched_getaffinity
(
pid
,
mask
);
if
(
ret
==
0
) {
size_t
retlen
=
min_t
(
size_t
,
len
,
cpumask_size
());
if
(
compat_put_bitmap
(
user_mask_ptr
,
cpumask_bits
(
mask
),
retlen
*
8
))
ret
=
-
EFAULT
;
else
ret
=
retlen
;
}
free_cpumask_var
(
mask
);
return
ret
;
}
int
get_compat_itimerspec
(
struct
itimerspec
*
dst
,
const
struct
compat_itimerspec
__user
*
src
)
{
if
(
get_compat_timespec
(
&
dst
->
it_interval
,
&
src
->
it_interval
)
||
get_compat_timespec
(
&
dst
->
it_value
,
&
src
->
it_value
))
return
-
EFAULT
;
return
0
;
}
int
put_compat_itimerspec
(
struct
compat_itimerspec
__user
*
dst
,
const
struct
itimerspec
*
src
)
{
if
(
put_compat_timespec
(
&
src
->
it_interval
,
&
dst
->
it_interval
)
||
put_compat_timespec
(
&
src
->
it_value
,
&
dst
->
it_value
))
return
-
EFAULT
;
return
0
;
}
long
compat_sys_timer_create
(
clockid_t
which_clock
,
struct
compat_sigevent
__user
*
timer_event_spec
,
timer_t
__user
*
created_timer_id
)
{
struct
sigevent
__user
*
event
=
NULL
;
if
(
timer_event_spec
) {
struct
sigevent
kevent
;
event
=
compat_alloc_user_space
(
sizeof
(
*
event
));
if
(
get_compat_sigevent
(
&
kevent
,
timer_event_spec
)
||
copy_to_user
(
event
,
&
kevent
,
sizeof
(
*
event
)))
return
-
EFAULT
;
}
return
sys_timer_create
(
which_clock
,
event
,
created_timer_id
);
}
long
compat_sys_timer_settime
(
timer_t
timer_id
,
int
flags
,
struct
compat_itimerspec
__user
*
new
,
struct
compat_itimerspec
__user
*
old
)
{
long
err
;
mm_segment_t
oldfs
;
struct
itimerspec
newts
,
oldts
;
if
(!
new
)
return
-
EINVAL
;
if
(
get_compat_itimerspec
(
&
newts
,
new
))
return
-
EFAULT
;
oldfs
=
get_fs
();
set_fs
(
KERNEL_DS
);
err
=
sys_timer_settime
(
timer_id
,
flags
,
(
struct
itimerspec
__user
*
)
&
newts
,
(
struct
itimerspec
__user
*
)
&
oldts
);
set_fs
(
oldfs
);
if
(!
err
&&
old
&&
put_compat_itimerspec
(
old
,
&
oldts
))
return
-
EFAULT
;
return
err
;
}
long
compat_sys_timer_gettime
(
timer_t
timer_id
,
struct
compat_itimerspec
__user
*
setting
)
{
long
err
;
mm_segment_t
oldfs
;
struct
itimerspec
ts
;
oldfs
=
get_fs
();
set_fs
(
KERNEL_DS
);
err
=
sys_timer_gettime
(
timer_id
,
(
struct
itimerspec
__user
*
)
&
ts
);
set_fs
(
oldfs
);
if
(!
err
&&
put_compat_itimerspec
(
setting
,
&
ts
))
return
-
EFAULT
;
return
err
;
}
long
compat_sys_clock_settime
(
clockid_t
which_clock
,
struct
compat_timespec
__user
*
tp
)
{
long
err
;
mm_segment_t
oldfs
;
struct
timespec
ts
;
if
(
get_compat_timespec
(
&
ts
,
tp
))
return
-
EFAULT
;
oldfs
=
get_fs
();
set_fs
(
KERNEL_DS
);
err
=
sys_clock_settime
(
which_clock
,
(
struct
timespec
__user
*
)
&
ts
);
set_fs
(
oldfs
);
return
err
;
}
long
compat_sys_clock_gettime
(
clockid_t
which_clock
,
struct
compat_timespec
__user
*
tp
)
{
long
err
;
mm_segment_t
oldfs
;
struct
timespec
ts
;
oldfs
=
get_fs
();
set_fs
(
KERNEL_DS
);
err
=
sys_clock_gettime
(
which_clock
,
(
struct
timespec
__user
*
)
&
ts
);
set_fs
(
oldfs
);
if
(!
err
&&
put_compat_timespec
(
&
ts
,
tp
))
return
-
EFAULT
;
return
err
;
}
long
compat_sys_clock_adjtime
(
clockid_t
which_clock
,
struct
compat_timex
__user
*
utp
)
{
struct
timex
txc
;
mm_segment_t
oldfs
;
int
err
,
ret
;
err
=
compat_get_timex
(
&
txc
,
utp
);
if
(
err
)
return
err
;
oldfs
=
get_fs
();
set_fs
(
KERNEL_DS
);
ret
=
sys_clock_adjtime
(
which_clock
, (
struct
timex
__user
*
)
&
txc
);
set_fs
(
oldfs
);
err
=
compat_put_timex
(
utp
,
&
txc
);
if
(
err
)
return
err
;
return
ret
;
}
long
compat_sys_clock_getres
(
clockid_t
which_clock
,
struct
compat_timespec
__user
*
tp
)
{
long
err
;
mm_segment_t
oldfs
;
struct
timespec
ts
;
oldfs
=
get_fs
();
set_fs
(
KERNEL_DS
);
err
=
sys_clock_getres
(
which_clock
,
(
struct
timespec
__user
*
)
&
ts
);
set_fs
(
oldfs
);
if
(!
err
&&
tp
&&
put_compat_timespec
(
&
ts
,
tp
))
return
-
EFAULT
;
return
err
;
}
static
long
compat_clock_nanosleep_restart
(
struct
restart_block
*
restart
)
{
long
err
;
mm_segment_t
oldfs
;
struct
timespec
tu
;
struct
compat_timespec
*
rmtp
=
restart
->
nanosleep
.
compat_rmtp
;
restart
->
nanosleep
.
rmtp
=
(
struct
timespec
__user
*
)
&
tu
;
oldfs
=
get_fs
();
set_fs
(
KERNEL_DS
);
err
=
clock_nanosleep_restart
(
restart
);
set_fs
(
oldfs
);
if
((
err
==
-
ERESTART_RESTARTBLOCK
)
&&
rmtp
&&
put_compat_timespec
(
&
tu
,
rmtp
))
return
-
EFAULT
;
if
(
err
==
-
ERESTART_RESTARTBLOCK
) {
restart
->
fn
=
compat_clock_nanosleep_restart
;
restart
->
nanosleep
.
compat_rmtp
=
rmtp
;
}
return
err
;
}
long
compat_sys_clock_nanosleep
(
clockid_t
which_clock
,
int
flags
,
struct
compat_timespec
__user
*
rqtp
,
struct
compat_timespec
__user
*
rmtp
)
{
long
err
;
mm_segment_t
oldfs
;
struct
timespec
in
,
out
;
struct
restart_block
*
restart
;
if
(
get_compat_timespec
(
&
in
,
rqtp
))
return
-
EFAULT
;
oldfs
=
get_fs
();
set_fs
(
KERNEL_DS
);
err
=
sys_clock_nanosleep
(
which_clock
,
flags
,
(
struct
timespec
__user
*
)
&
in
,
(
struct
timespec
__user
*
)
&
out
);
set_fs
(
oldfs
);
if
((
err
==
-
ERESTART_RESTARTBLOCK
)
&&
rmtp
&&
put_compat_timespec
(
&
out
,
rmtp
))
return
-
EFAULT
;
if
(
err
==
-
ERESTART_RESTARTBLOCK
) {
restart
=
&
current_thread_info
()
->
restart_block
;
restart
->
fn
=
compat_clock_nanosleep_restart
;
restart
->
nanosleep
.
compat_rmtp
=
rmtp
;
}
return
err
;
}
/*
* We currently only need the following fields from the sigevent
* structure: sigev_value, sigev_signo, sig_notify and (sometimes
* sigev_notify_thread_id). The others are handled in user mode.
* We also assume that copying sigev_value.sival_int is sufficient
* to keep all the bits of sigev_value.sival_ptr intact.
*/
int
get_compat_sigevent
(
struct
sigevent
*
event
,
const
struct
compat_sigevent
__user
*
u_event
)
{
memset
(
event
,
0
,
sizeof
(
*
event
));
return
(!
access_ok
(
VERIFY_READ
,
u_event
,
sizeof
(
*
u_event
))
||
__get_user
(
event
->
sigev_value
.
sival_int
,
&
u_event
->
sigev_value
.
sival_int
)
||
__get_user
(
event
->
sigev_signo
,
&
u_event
->
sigev_signo
)
||
__get_user
(
event
->
sigev_notify
,
&
u_event
->
sigev_notify
)
||
__get_user
(
event
->
sigev_notify_thread_id
,
&
u_event
->
sigev_notify_thread_id
))
?
-
EFAULT
:
0
;
}
long
compat_get_bitmap
(
unsigned long
*
mask
,
const
compat_ulong_t
__user
*
umask
,
unsigned long
bitmap_size
)
{
int
i
,
j
;
unsigned long
m
;
compat_ulong_t
um
;
unsigned long
nr_compat_longs
;
/* align bitmap up to nearest compat_long_t boundary */
bitmap_size
=
ALIGN
(
bitmap_size
,
BITS_PER_COMPAT_LONG
);
if
(!
access_ok
(
VERIFY_READ
,
umask
,
bitmap_size
/
8
))
return
-
EFAULT
;
nr_compat_longs
=
BITS_TO_COMPAT_LONGS
(
bitmap_size
);
for
(
i
=
0
;
i
<
BITS_TO_LONGS
(
bitmap_size
);
i
++
) {
m
=
0
;
for
(
j
=
0
;
j
<
sizeof
(
m
)/
sizeof
(
um
);
j
++
) {
/*
* We dont want to read past the end of the userspace
* bitmap. We must however ensure the end of the
* kernel bitmap is zeroed.
*/
if
(
nr_compat_longs
--
>
0
) {
if
(
__get_user
(
um
,
umask
))
return
-
EFAULT
;
}
else
{
um
=
0
;
}
umask
++
;
m
|= (
long
)
um
<< (
j
*
BITS_PER_COMPAT_LONG
);
}
*
mask
++
=
m
;
}
return
0
;
}
long
compat_put_bitmap
(
compat_ulong_t
__user
*
umask
,
unsigned long
*
mask
,
unsigned long
bitmap_size
)
{
int
i
,
j
;
unsigned long
m
;
compat_ulong_t
um
;
unsigned long
nr_compat_longs
;
/* align bitmap up to nearest compat_long_t boundary */
bitmap_size
=
ALIGN
(
bitmap_size
,
BITS_PER_COMPAT_LONG
);
if
(!
access_ok
(
VERIFY_WRITE
,
umask
,
bitmap_size
/
8
))
return
-
EFAULT
;
nr_compat_longs
=
BITS_TO_COMPAT_LONGS
(
bitmap_size
);
for
(
i
=
0
;
i
<
BITS_TO_LONGS
(
bitmap_size
);
i
++
) {
m
=
*
mask
++
;
for
(
j
=
0
;
j
<
sizeof
(
m
)/
sizeof
(
um
);
j
++
) {
um
=
m
;
/*
* We dont want to write past the end of the userspace
* bitmap.
*/
if
(
nr_compat_longs
--
>
0
) {
if
(
__put_user
(
um
,
umask
))
return
-
EFAULT
;
}
umask
++
;
m
>>=
4
*
sizeof
(
um
);
m
>>=
4
*
sizeof
(
um
);
}
}
return
0
;
}
void
sigset_from_compat
(
sigset_t
*
set
,
compat_sigset_t
*
compat
)
{
switch
(
_NSIG_WORDS
) {
case
4
:
set
->
sig
[
3
]
=
compat
->
sig
[
6
] | (((
long
)
compat
->
sig
[
7
]) <<
32
);
case
3
:
set
->
sig
[
2
]
=
compat
->
sig
[
4
] | (((
long
)
compat
->
sig
[
5
]) <<
32
);
case
2
:
set
->
sig
[
1
]
=
compat
->
sig
[
2
] | (((
long
)
compat
->
sig
[
3
]) <<
32
);
case
1
:
set
->
sig
[
0
]
=
compat
->
sig
[
0
] | (((
long
)
compat
->
sig
[
1
]) <<
32
);
}
}
EXPORT_SYMBOL_GPL
(
sigset_from_compat
);
asmlinkage
long
compat_sys_rt_sigtimedwait
(
compat_sigset_t
__user
*
uthese
,
struct
compat_siginfo
__user
*
uinfo
,
struct
compat_timespec
__user
*
uts
,
compat_size_t
sigsetsize
)
{
compat_sigset_t
s32
;
sigset_t
s
;
struct
timespec
t
;
siginfo_t
info
;
long
ret
;
if
(
sigsetsize
!=
sizeof
(
sigset_t
))
return
-
EINVAL
;
if
(
copy_from_user
(
&
s32
,
uthese
,
sizeof
(
compat_sigset_t
)))
return
-
EFAULT
;
sigset_from_compat
(
&
s
,
&
s32
);
if
(
uts
) {
if
(
get_compat_timespec
(
&
t
,
uts
))
return
-
EFAULT
;
}
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