2 * sys_ppc32.c: Conversion between 32bit and 64bit native syscalls.
4 * Copyright (C) 2001 IBM
5 * Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
6 * Copyright (C) 1997 David S. Miller (davem@caip.rutgers.edu)
8 * These routines maintain argument size conversion between 32bit and 64bit
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License
13 * as published by the Free Software Foundation; either version
14 * 2 of the License, or (at your option) any later version.
17 #include <linux/kernel.h>
18 #include <linux/sched.h>
21 #include <linux/file.h>
22 #include <linux/signal.h>
23 #include <linux/resource.h>
24 #include <linux/times.h>
25 #include <linux/utsname.h>
26 #include <linux/smp.h>
27 #include <linux/smp_lock.h>
28 #include <linux/sem.h>
29 #include <linux/msg.h>
30 #include <linux/shm.h>
31 #include <linux/poll.h>
32 #include <linux/personality.h>
33 #include <linux/stat.h>
34 #include <linux/mman.h>
36 #include <linux/syscalls.h>
37 #include <linux/unistd.h>
38 #include <linux/sysctl.h>
39 #include <linux/binfmts.h>
40 #include <linux/security.h>
41 #include <linux/compat.h>
42 #include <linux/ptrace.h>
43 #include <linux/elf.h>
45 #include <asm/ptrace.h>
46 #include <asm/types.h>
48 #include <asm/uaccess.h>
49 #include <asm/unistd.h>
50 #include <asm/semaphore.h>
52 #include <asm/mmu_context.h>
53 #include <asm/ppc-pci.h>
55 /* readdir & getdents */
56 #define NAME_OFFSET(de) ((int) ((de)->d_name - (char __user *) (de)))
57 #define ROUND_UP(x) (((x)+sizeof(u32)-1) & ~(sizeof(u32)-1))
59 struct old_linux_dirent32
{
62 unsigned short d_namlen
;
66 struct readdir_callback32
{
67 struct old_linux_dirent32 __user
* dirent
;
71 static int fillonedir(void * __buf
, const char * name
, int namlen
,
72 off_t offset
, ino_t ino
, unsigned int d_type
)
74 struct readdir_callback32
* buf
= (struct readdir_callback32
*) __buf
;
75 struct old_linux_dirent32 __user
* dirent
;
81 put_user(ino
, &dirent
->d_ino
);
82 put_user(offset
, &dirent
->d_offset
);
83 put_user(namlen
, &dirent
->d_namlen
);
84 copy_to_user(dirent
->d_name
, name
, namlen
);
85 put_user(0, dirent
->d_name
+ namlen
);
89 asmlinkage
int old32_readdir(unsigned int fd
, struct old_linux_dirent32 __user
*dirent
, unsigned int count
)
93 struct readdir_callback32 buf
;
102 error
= vfs_readdir(file
, (filldir_t
)fillonedir
, &buf
);
113 asmlinkage
long ppc32_select(u32 n
, compat_ulong_t __user
*inp
,
114 compat_ulong_t __user
*outp
, compat_ulong_t __user
*exp
,
118 return compat_sys_select((int)n
, inp
, outp
, exp
, compat_ptr(tvp_x
));
121 int cp_compat_stat(struct kstat
*stat
, struct compat_stat __user
*statbuf
)
125 if (stat
->size
> MAX_NON_LFS
|| !new_valid_dev(stat
->dev
) ||
126 !new_valid_dev(stat
->rdev
))
129 err
= access_ok(VERIFY_WRITE
, statbuf
, sizeof(*statbuf
)) ? 0 : -EFAULT
;
130 err
|= __put_user(new_encode_dev(stat
->dev
), &statbuf
->st_dev
);
131 err
|= __put_user(stat
->ino
, &statbuf
->st_ino
);
132 err
|= __put_user(stat
->mode
, &statbuf
->st_mode
);
133 err
|= __put_user(stat
->nlink
, &statbuf
->st_nlink
);
134 err
|= __put_user(stat
->uid
, &statbuf
->st_uid
);
135 err
|= __put_user(stat
->gid
, &statbuf
->st_gid
);
136 err
|= __put_user(new_encode_dev(stat
->rdev
), &statbuf
->st_rdev
);
137 err
|= __put_user(stat
->size
, &statbuf
->st_size
);
138 err
|= __put_user(stat
->atime
.tv_sec
, &statbuf
->st_atime
);
139 err
|= __put_user(stat
->atime
.tv_nsec
, &statbuf
->st_atime_nsec
);
140 err
|= __put_user(stat
->mtime
.tv_sec
, &statbuf
->st_mtime
);
141 err
|= __put_user(stat
->mtime
.tv_nsec
, &statbuf
->st_mtime_nsec
);
142 err
|= __put_user(stat
->ctime
.tv_sec
, &statbuf
->st_ctime
);
143 err
|= __put_user(stat
->ctime
.tv_nsec
, &statbuf
->st_ctime_nsec
);
144 err
|= __put_user(stat
->blksize
, &statbuf
->st_blksize
);
145 err
|= __put_user(stat
->blocks
, &statbuf
->st_blocks
);
146 err
|= __put_user(0, &statbuf
->__unused4
[0]);
147 err
|= __put_user(0, &statbuf
->__unused4
[1]);
152 /* Note: it is necessary to treat option as an unsigned int,
153 * with the corresponding cast to a signed int to insure that the
154 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
155 * and the register representation of a signed int (msr in 64-bit mode) is performed.
157 asmlinkage
long compat_sys_sysfs(u32 option
, u32 arg1
, u32 arg2
)
159 return sys_sysfs((int)option
, arg1
, arg2
);
162 asmlinkage
long compat_sys_pause(void)
164 current
->state
= TASK_INTERRUPTIBLE
;
167 return -ERESTARTNOHAND
;
170 static inline long get_ts32(struct timespec
*o
, struct compat_timeval __user
*i
)
174 if (!access_ok(VERIFY_READ
, i
, sizeof(*i
)))
176 if (__get_user(o
->tv_sec
, &i
->tv_sec
))
178 if (__get_user(usec
, &i
->tv_usec
))
180 o
->tv_nsec
= usec
* 1000;
184 static inline long put_tv32(struct compat_timeval __user
*o
, struct timeval
*i
)
186 return (!access_ok(VERIFY_WRITE
, o
, sizeof(*o
)) ||
187 (__put_user(i
->tv_sec
, &o
->tv_sec
) |
188 __put_user(i
->tv_usec
, &o
->tv_usec
)));
200 unsigned short procs
;
205 char _f
[20-2*sizeof(int)-sizeof(int)];
208 asmlinkage
long compat_sys_sysinfo(struct sysinfo32 __user
*info
)
213 mm_segment_t old_fs
= get_fs ();
215 /* The __user cast is valid due to set_fs() */
217 ret
= sys_sysinfo((struct sysinfo __user
*)&s
);
220 /* Check to see if any memory value is too large for 32-bit and
221 * scale down if needed.
223 if ((s
.totalram
>> 32) || (s
.totalswap
>> 32)) {
224 while (s
.mem_unit
< PAGE_SIZE
) {
228 s
.totalram
>>=bitcount
;
229 s
.freeram
>>= bitcount
;
230 s
.sharedram
>>= bitcount
;
231 s
.bufferram
>>= bitcount
;
232 s
.totalswap
>>= bitcount
;
233 s
.freeswap
>>= bitcount
;
234 s
.totalhigh
>>= bitcount
;
235 s
.freehigh
>>= bitcount
;
238 err
= put_user (s
.uptime
, &info
->uptime
);
239 err
|= __put_user (s
.loads
[0], &info
->loads
[0]);
240 err
|= __put_user (s
.loads
[1], &info
->loads
[1]);
241 err
|= __put_user (s
.loads
[2], &info
->loads
[2]);
242 err
|= __put_user (s
.totalram
, &info
->totalram
);
243 err
|= __put_user (s
.freeram
, &info
->freeram
);
244 err
|= __put_user (s
.sharedram
, &info
->sharedram
);
245 err
|= __put_user (s
.bufferram
, &info
->bufferram
);
246 err
|= __put_user (s
.totalswap
, &info
->totalswap
);
247 err
|= __put_user (s
.freeswap
, &info
->freeswap
);
248 err
|= __put_user (s
.procs
, &info
->procs
);
249 err
|= __put_user (s
.totalhigh
, &info
->totalhigh
);
250 err
|= __put_user (s
.freehigh
, &info
->freehigh
);
251 err
|= __put_user (s
.mem_unit
, &info
->mem_unit
);
261 /* Translations due to time_t size differences. Which affects all
262 sorts of things, like timeval and itimerval. */
263 extern struct timezone sys_tz
;
265 asmlinkage
long compat_sys_gettimeofday(struct compat_timeval __user
*tv
, struct timezone __user
*tz
)
269 do_gettimeofday(&ktv
);
270 if (put_tv32(tv
, &ktv
))
274 if (copy_to_user(tz
, &sys_tz
, sizeof(sys_tz
)))
283 asmlinkage
long compat_sys_settimeofday(struct compat_timeval __user
*tv
, struct timezone __user
*tz
)
289 if (get_ts32(&kts
, tv
))
293 if (copy_from_user(&ktz
, tz
, sizeof(ktz
)))
297 return do_sys_settimeofday(tv
? &kts
: NULL
, tz
? &ktz
: NULL
);
300 #ifdef CONFIG_SYSVIPC
301 long compat_sys_ipc(u32 call
, u32 first
, u32 second
, u32 third
, compat_uptr_t ptr
,
306 version
= call
>> 16; /* hack for backward compatibility */
313 /* sign extend semid */
314 return compat_sys_semtimedop((int)first
,
315 compat_ptr(ptr
), second
,
317 /* else fall through for normal semop() */
319 /* struct sembuf is the same on 32 and 64bit :)) */
320 /* sign extend semid */
321 return sys_semtimedop((int)first
, compat_ptr(ptr
), second
,
324 /* sign extend key, nsems */
325 return sys_semget((int)first
, (int)second
, third
);
327 /* sign extend semid, semnum */
328 return compat_sys_semctl((int)first
, (int)second
, third
,
332 /* sign extend msqid */
333 return compat_sys_msgsnd((int)first
, (int)second
, third
,
336 /* sign extend msqid, msgtyp */
337 return compat_sys_msgrcv((int)first
, second
, (int)fifth
,
338 third
, version
, compat_ptr(ptr
));
340 /* sign extend key */
341 return sys_msgget((int)first
, second
);
343 /* sign extend msqid */
344 return compat_sys_msgctl((int)first
, second
, compat_ptr(ptr
));
347 /* sign extend shmid */
348 return compat_sys_shmat((int)first
, second
, third
, version
,
351 return sys_shmdt(compat_ptr(ptr
));
353 /* sign extend key_t */
354 return sys_shmget((int)first
, second
, third
);
356 /* sign extend shmid */
357 return compat_sys_shmctl((int)first
, second
, compat_ptr(ptr
));
367 /* Note: it is necessary to treat out_fd and in_fd as unsigned ints,
368 * with the corresponding cast to a signed int to insure that the
369 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
370 * and the register representation of a signed int (msr in 64-bit mode) is performed.
372 asmlinkage
long compat_sys_sendfile(u32 out_fd
, u32 in_fd
, compat_off_t __user
* offset
, u32 count
)
374 mm_segment_t old_fs
= get_fs();
379 if (offset
&& get_user(of
, offset
))
382 /* The __user pointer cast is valid because of the set_fs() */
384 up
= offset
? (off_t __user
*) &of
: NULL
;
385 ret
= sys_sendfile((int)out_fd
, (int)in_fd
, up
, count
);
388 if (offset
&& put_user(of
, offset
))
394 asmlinkage
int compat_sys_sendfile64(int out_fd
, int in_fd
, compat_loff_t __user
*offset
, s32 count
)
396 mm_segment_t old_fs
= get_fs();
401 if (offset
&& get_user(lof
, offset
))
404 /* The __user pointer cast is valid because of the set_fs() */
406 up
= offset
? (loff_t __user
*) &lof
: NULL
;
407 ret
= sys_sendfile64(out_fd
, in_fd
, up
, count
);
410 if (offset
&& put_user(lof
, offset
))
416 long compat_sys_execve(unsigned long a0
, unsigned long a1
, unsigned long a2
,
417 unsigned long a3
, unsigned long a4
, unsigned long a5
,
418 struct pt_regs
*regs
)
423 filename
= getname((char __user
*) a0
);
424 error
= PTR_ERR(filename
);
425 if (IS_ERR(filename
))
427 flush_fp_to_thread(current
);
428 flush_altivec_to_thread(current
);
430 error
= compat_do_execve(filename
, compat_ptr(a1
), compat_ptr(a2
), regs
);
434 current
->ptrace
&= ~PT_DTRACE
;
435 task_unlock(current
);
443 /* Note: it is necessary to treat option as an unsigned int,
444 * with the corresponding cast to a signed int to insure that the
445 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
446 * and the register representation of a signed int (msr in 64-bit mode) is performed.
448 asmlinkage
long compat_sys_prctl(u32 option
, u32 arg2
, u32 arg3
, u32 arg4
, u32 arg5
)
450 return sys_prctl((int)option
,
451 (unsigned long) arg2
,
452 (unsigned long) arg3
,
453 (unsigned long) arg4
,
454 (unsigned long) arg5
);
457 /* Note: it is necessary to treat pid as an unsigned int,
458 * with the corresponding cast to a signed int to insure that the
459 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
460 * and the register representation of a signed int (msr in 64-bit mode) is performed.
462 asmlinkage
long compat_sys_sched_rr_get_interval(u32 pid
, struct compat_timespec __user
*interval
)
466 mm_segment_t old_fs
= get_fs ();
468 /* The __user pointer cast is valid because of the set_fs() */
470 ret
= sys_sched_rr_get_interval((int)pid
, (struct timespec __user
*) &t
);
472 if (put_compat_timespec(&t
, interval
))
477 /* Note: it is necessary to treat mode as an unsigned int,
478 * with the corresponding cast to a signed int to insure that the
479 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
480 * and the register representation of a signed int (msr in 64-bit mode) is performed.
482 asmlinkage
long compat_sys_access(const char __user
* filename
, u32 mode
)
484 return sys_access(filename
, (int)mode
);
488 /* Note: it is necessary to treat mode as an unsigned int,
489 * with the corresponding cast to a signed int to insure that the
490 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
491 * and the register representation of a signed int (msr in 64-bit mode) is performed.
493 asmlinkage
long compat_sys_creat(const char __user
* pathname
, u32 mode
)
495 return sys_creat(pathname
, (int)mode
);
499 /* Note: it is necessary to treat pid and options as unsigned ints,
500 * with the corresponding cast to a signed int to insure that the
501 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
502 * and the register representation of a signed int (msr in 64-bit mode) is performed.
504 asmlinkage
long compat_sys_waitpid(u32 pid
, unsigned int __user
* stat_addr
, u32 options
)
506 return sys_waitpid((int)pid
, stat_addr
, (int)options
);
510 /* Note: it is necessary to treat gidsetsize as an unsigned int,
511 * with the corresponding cast to a signed int to insure that the
512 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
513 * and the register representation of a signed int (msr in 64-bit mode) is performed.
515 asmlinkage
long compat_sys_getgroups(u32 gidsetsize
, gid_t __user
*grouplist
)
517 return sys_getgroups((int)gidsetsize
, grouplist
);
521 /* Note: it is necessary to treat pid as an unsigned int,
522 * with the corresponding cast to a signed int to insure that the
523 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
524 * and the register representation of a signed int (msr in 64-bit mode) is performed.
526 asmlinkage
long compat_sys_getpgid(u32 pid
)
528 return sys_getpgid((int)pid
);
533 /* Note: it is necessary to treat pid as an unsigned int,
534 * with the corresponding cast to a signed int to insure that the
535 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
536 * and the register representation of a signed int (msr in 64-bit mode) is performed.
538 asmlinkage
long compat_sys_getsid(u32 pid
)
540 return sys_getsid((int)pid
);
544 /* Note: it is necessary to treat pid and sig as unsigned ints,
545 * with the corresponding cast to a signed int to insure that the
546 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
547 * and the register representation of a signed int (msr in 64-bit mode) is performed.
549 asmlinkage
long compat_sys_kill(u32 pid
, u32 sig
)
551 return sys_kill((int)pid
, (int)sig
);
555 /* Note: it is necessary to treat mode as an unsigned int,
556 * with the corresponding cast to a signed int to insure that the
557 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
558 * and the register representation of a signed int (msr in 64-bit mode) is performed.
560 asmlinkage
long compat_sys_mkdir(const char __user
* pathname
, u32 mode
)
562 return sys_mkdir(pathname
, (int)mode
);
565 long compat_sys_nice(u32 increment
)
567 /* sign extend increment */
568 return sys_nice((int)increment
);
571 off_t
ppc32_lseek(unsigned int fd
, u32 offset
, unsigned int origin
)
574 return sys_lseek(fd
, (int)offset
, origin
);
577 /* Note: it is necessary to treat bufsiz as an unsigned int,
578 * with the corresponding cast to a signed int to insure that the
579 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
580 * and the register representation of a signed int (msr in 64-bit mode) is performed.
582 asmlinkage
long compat_sys_readlink(const char __user
* path
, char __user
* buf
, u32 bufsiz
)
584 return sys_readlink(path
, buf
, (int)bufsiz
);
587 /* Note: it is necessary to treat option as an unsigned int,
588 * with the corresponding cast to a signed int to insure that the
589 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
590 * and the register representation of a signed int (msr in 64-bit mode) is performed.
592 asmlinkage
long compat_sys_sched_get_priority_max(u32 policy
)
594 return sys_sched_get_priority_max((int)policy
);
598 /* Note: it is necessary to treat policy as an unsigned int,
599 * with the corresponding cast to a signed int to insure that the
600 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
601 * and the register representation of a signed int (msr in 64-bit mode) is performed.
603 asmlinkage
long compat_sys_sched_get_priority_min(u32 policy
)
605 return sys_sched_get_priority_min((int)policy
);
609 /* Note: it is necessary to treat pid as an unsigned int,
610 * with the corresponding cast to a signed int to insure that the
611 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
612 * and the register representation of a signed int (msr in 64-bit mode) is performed.
614 asmlinkage
long compat_sys_sched_getparam(u32 pid
, struct sched_param __user
*param
)
616 return sys_sched_getparam((int)pid
, param
);
620 /* Note: it is necessary to treat pid as an unsigned int,
621 * with the corresponding cast to a signed int to insure that the
622 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
623 * and the register representation of a signed int (msr in 64-bit mode) is performed.
625 asmlinkage
long compat_sys_sched_getscheduler(u32 pid
)
627 return sys_sched_getscheduler((int)pid
);
631 /* Note: it is necessary to treat pid as an unsigned int,
632 * with the corresponding cast to a signed int to insure that the
633 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
634 * and the register representation of a signed int (msr in 64-bit mode) is performed.
636 asmlinkage
long compat_sys_sched_setparam(u32 pid
, struct sched_param __user
*param
)
638 return sys_sched_setparam((int)pid
, param
);
642 /* Note: it is necessary to treat pid and policy as unsigned ints,
643 * with the corresponding cast to a signed int to insure that the
644 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
645 * and the register representation of a signed int (msr in 64-bit mode) is performed.
647 asmlinkage
long compat_sys_sched_setscheduler(u32 pid
, u32 policy
, struct sched_param __user
*param
)
649 return sys_sched_setscheduler((int)pid
, (int)policy
, param
);
653 /* Note: it is necessary to treat len as an unsigned int,
654 * with the corresponding cast to a signed int to insure that the
655 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
656 * and the register representation of a signed int (msr in 64-bit mode) is performed.
658 asmlinkage
long compat_sys_setdomainname(char __user
*name
, u32 len
)
660 return sys_setdomainname(name
, (int)len
);
664 /* Note: it is necessary to treat gidsetsize as an unsigned int,
665 * with the corresponding cast to a signed int to insure that the
666 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
667 * and the register representation of a signed int (msr in 64-bit mode) is performed.
669 asmlinkage
long compat_sys_setgroups(u32 gidsetsize
, gid_t __user
*grouplist
)
671 return sys_setgroups((int)gidsetsize
, grouplist
);
675 asmlinkage
long compat_sys_sethostname(char __user
*name
, u32 len
)
677 /* sign extend len */
678 return sys_sethostname(name
, (int)len
);
682 /* Note: it is necessary to treat pid and pgid as unsigned ints,
683 * with the corresponding cast to a signed int to insure that the
684 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
685 * and the register representation of a signed int (msr in 64-bit mode) is performed.
687 asmlinkage
long compat_sys_setpgid(u32 pid
, u32 pgid
)
689 return sys_setpgid((int)pid
, (int)pgid
);
692 long compat_sys_getpriority(u32 which
, u32 who
)
694 /* sign extend which and who */
695 return sys_getpriority((int)which
, (int)who
);
698 long compat_sys_setpriority(u32 which
, u32 who
, u32 niceval
)
700 /* sign extend which, who and niceval */
701 return sys_setpriority((int)which
, (int)who
, (int)niceval
);
704 long compat_sys_ioprio_get(u32 which
, u32 who
)
706 /* sign extend which and who */
707 return sys_ioprio_get((int)which
, (int)who
);
710 long compat_sys_ioprio_set(u32 which
, u32 who
, u32 ioprio
)
712 /* sign extend which, who and ioprio */
713 return sys_ioprio_set((int)which
, (int)who
, (int)ioprio
);
716 /* Note: it is necessary to treat newmask as an unsigned int,
717 * with the corresponding cast to a signed int to insure that the
718 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
719 * and the register representation of a signed int (msr in 64-bit mode) is performed.
721 asmlinkage
long compat_sys_ssetmask(u32 newmask
)
723 return sys_ssetmask((int) newmask
);
726 asmlinkage
long compat_sys_syslog(u32 type
, char __user
* buf
, u32 len
)
728 /* sign extend len */
729 return sys_syslog(type
, buf
, (int)len
);
733 /* Note: it is necessary to treat mask as an unsigned int,
734 * with the corresponding cast to a signed int to insure that the
735 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
736 * and the register representation of a signed int (msr in 64-bit mode) is performed.
738 asmlinkage
long compat_sys_umask(u32 mask
)
740 return sys_umask((int)mask
);
743 #ifdef CONFIG_SYSCTL_SYSCALL
744 struct __sysctl_args32
{
754 asmlinkage
long compat_sys_sysctl(struct __sysctl_args32 __user
*args
)
756 struct __sysctl_args32 tmp
;
759 size_t __user
*oldlenp
= NULL
;
760 unsigned long addr
= (((unsigned long)&args
->__unused
[0]) + 7) & ~7;
762 if (copy_from_user(&tmp
, args
, sizeof(tmp
)))
765 if (tmp
.oldval
&& tmp
.oldlenp
) {
766 /* Duh, this is ugly and might not work if sysctl_args
767 is in read-only memory, but do_sysctl does indirectly
768 a lot of uaccess in both directions and we'd have to
769 basically copy the whole sysctl.c here, and
770 glibc's __sysctl uses rw memory for the structure
772 oldlenp
= (size_t __user
*)addr
;
773 if (get_user(oldlen
, (compat_size_t __user
*)compat_ptr(tmp
.oldlenp
)) ||
774 put_user(oldlen
, oldlenp
))
779 error
= do_sysctl(compat_ptr(tmp
.name
), tmp
.nlen
,
780 compat_ptr(tmp
.oldval
), oldlenp
,
781 compat_ptr(tmp
.newval
), tmp
.newlen
);
785 if (get_user(oldlen
, oldlenp
) ||
786 put_user(oldlen
, (compat_size_t __user
*)compat_ptr(tmp
.oldlenp
)))
789 copy_to_user(args
->__unused
, tmp
.__unused
, sizeof(tmp
.__unused
));
795 unsigned long compat_sys_mmap2(unsigned long addr
, size_t len
,
796 unsigned long prot
, unsigned long flags
,
797 unsigned long fd
, unsigned long pgoff
)
799 /* This should remain 12 even if PAGE_SIZE changes */
800 return sys_mmap(addr
, len
, prot
, flags
, fd
, pgoff
<< 12);
803 long compat_sys_tgkill(u32 tgid
, u32 pid
, int sig
)
805 /* sign extend tgid, pid */
806 return sys_tgkill((int)tgid
, (int)pid
, sig
);
811 * The 32 bit ABI passes long longs in an odd even register pair.
814 compat_ssize_t
compat_sys_pread64(unsigned int fd
, char __user
*ubuf
, compat_size_t count
,
815 u32 reg6
, u32 poshi
, u32 poslo
)
817 return sys_pread64(fd
, ubuf
, count
, ((loff_t
)poshi
<< 32) | poslo
);
820 compat_ssize_t
compat_sys_pwrite64(unsigned int fd
, char __user
*ubuf
, compat_size_t count
,
821 u32 reg6
, u32 poshi
, u32 poslo
)
823 return sys_pwrite64(fd
, ubuf
, count
, ((loff_t
)poshi
<< 32) | poslo
);
826 compat_ssize_t
compat_sys_readahead(int fd
, u32 r4
, u32 offhi
, u32 offlo
, u32 count
)
828 return sys_readahead(fd
, ((loff_t
)offhi
<< 32) | offlo
, count
);
831 asmlinkage
int compat_sys_truncate64(const char __user
* path
, u32 reg4
,
832 unsigned long high
, unsigned long low
)
834 return sys_truncate(path
, (high
<< 32) | low
);
837 asmlinkage
int compat_sys_ftruncate64(unsigned int fd
, u32 reg4
, unsigned long high
,
840 return sys_ftruncate(fd
, (high
<< 32) | low
);
843 long ppc32_lookup_dcookie(u32 cookie_high
, u32 cookie_low
, char __user
*buf
,
846 return sys_lookup_dcookie((u64
)cookie_high
<< 32 | cookie_low
,
850 long ppc32_fadvise64(int fd
, u32 unused
, u32 offset_high
, u32 offset_low
,
851 size_t len
, int advice
)
853 return sys_fadvise64(fd
, (u64
)offset_high
<< 32 | offset_low
, len
,
857 asmlinkage
long compat_sys_add_key(const char __user
*_type
,
858 const char __user
*_description
,
859 const void __user
*_payload
,
863 return sys_add_key(_type
, _description
, _payload
, plen
, ringid
);
866 asmlinkage
long compat_sys_request_key(const char __user
*_type
,
867 const char __user
*_description
,
868 const char __user
*_callout_info
,
871 return sys_request_key(_type
, _description
, _callout_info
, destringid
);