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/config.h>
18 #include <linux/kernel.h>
19 #include <linux/sched.h>
22 #include <linux/file.h>
23 #include <linux/signal.h>
24 #include <linux/resource.h>
25 #include <linux/times.h>
26 #include <linux/utsname.h>
27 #include <linux/smp.h>
28 #include <linux/smp_lock.h>
29 #include <linux/sem.h>
30 #include <linux/msg.h>
31 #include <linux/shm.h>
32 #include <linux/poll.h>
33 #include <linux/personality.h>
34 #include <linux/stat.h>
35 #include <linux/mman.h>
37 #include <linux/syscalls.h>
38 #include <linux/unistd.h>
39 #include <linux/sysctl.h>
40 #include <linux/binfmts.h>
41 #include <linux/security.h>
42 #include <linux/compat.h>
43 #include <linux/ptrace.h>
44 #include <linux/elf.h>
46 #include <asm/ptrace.h>
47 #include <asm/types.h>
49 #include <asm/uaccess.h>
50 #include <asm/unistd.h>
51 #include <asm/semaphore.h>
53 #include <asm/mmu_context.h>
54 #include <asm/ppc-pci.h>
56 /* readdir & getdents */
57 #define NAME_OFFSET(de) ((int) ((de)->d_name - (char __user *) (de)))
58 #define ROUND_UP(x) (((x)+sizeof(u32)-1) & ~(sizeof(u32)-1))
60 struct old_linux_dirent32
{
63 unsigned short d_namlen
;
67 struct readdir_callback32
{
68 struct old_linux_dirent32 __user
* dirent
;
72 static int fillonedir(void * __buf
, const char * name
, int namlen
,
73 off_t offset
, ino_t ino
, unsigned int d_type
)
75 struct readdir_callback32
* buf
= (struct readdir_callback32
*) __buf
;
76 struct old_linux_dirent32 __user
* dirent
;
82 put_user(ino
, &dirent
->d_ino
);
83 put_user(offset
, &dirent
->d_offset
);
84 put_user(namlen
, &dirent
->d_namlen
);
85 copy_to_user(dirent
->d_name
, name
, namlen
);
86 put_user(0, dirent
->d_name
+ namlen
);
90 asmlinkage
int old32_readdir(unsigned int fd
, struct old_linux_dirent32 __user
*dirent
, unsigned int count
)
94 struct readdir_callback32 buf
;
103 error
= vfs_readdir(file
, (filldir_t
)fillonedir
, &buf
);
114 asmlinkage
long ppc32_select(u32 n
, compat_ulong_t __user
*inp
,
115 compat_ulong_t __user
*outp
, compat_ulong_t __user
*exp
,
119 return compat_sys_select((int)n
, inp
, outp
, exp
, compat_ptr(tvp_x
));
122 int cp_compat_stat(struct kstat
*stat
, struct compat_stat __user
*statbuf
)
126 if (stat
->size
> MAX_NON_LFS
|| !new_valid_dev(stat
->dev
) ||
127 !new_valid_dev(stat
->rdev
))
130 err
= access_ok(VERIFY_WRITE
, statbuf
, sizeof(*statbuf
)) ? 0 : -EFAULT
;
131 err
|= __put_user(new_encode_dev(stat
->dev
), &statbuf
->st_dev
);
132 err
|= __put_user(stat
->ino
, &statbuf
->st_ino
);
133 err
|= __put_user(stat
->mode
, &statbuf
->st_mode
);
134 err
|= __put_user(stat
->nlink
, &statbuf
->st_nlink
);
135 err
|= __put_user(stat
->uid
, &statbuf
->st_uid
);
136 err
|= __put_user(stat
->gid
, &statbuf
->st_gid
);
137 err
|= __put_user(new_encode_dev(stat
->rdev
), &statbuf
->st_rdev
);
138 err
|= __put_user(stat
->size
, &statbuf
->st_size
);
139 err
|= __put_user(stat
->atime
.tv_sec
, &statbuf
->st_atime
);
140 err
|= __put_user(stat
->atime
.tv_nsec
, &statbuf
->st_atime_nsec
);
141 err
|= __put_user(stat
->mtime
.tv_sec
, &statbuf
->st_mtime
);
142 err
|= __put_user(stat
->mtime
.tv_nsec
, &statbuf
->st_mtime_nsec
);
143 err
|= __put_user(stat
->ctime
.tv_sec
, &statbuf
->st_ctime
);
144 err
|= __put_user(stat
->ctime
.tv_nsec
, &statbuf
->st_ctime_nsec
);
145 err
|= __put_user(stat
->blksize
, &statbuf
->st_blksize
);
146 err
|= __put_user(stat
->blocks
, &statbuf
->st_blocks
);
147 err
|= __put_user(0, &statbuf
->__unused4
[0]);
148 err
|= __put_user(0, &statbuf
->__unused4
[1]);
153 /* Note: it is necessary to treat option as an unsigned int,
154 * with the corresponding cast to a signed int to insure that the
155 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
156 * and the register representation of a signed int (msr in 64-bit mode) is performed.
158 asmlinkage
long compat_sys_sysfs(u32 option
, u32 arg1
, u32 arg2
)
160 return sys_sysfs((int)option
, arg1
, arg2
);
163 asmlinkage
long compat_sys_pause(void)
165 current
->state
= TASK_INTERRUPTIBLE
;
168 return -ERESTARTNOHAND
;
171 static inline long get_ts32(struct timespec
*o
, struct compat_timeval __user
*i
)
175 if (!access_ok(VERIFY_READ
, i
, sizeof(*i
)))
177 if (__get_user(o
->tv_sec
, &i
->tv_sec
))
179 if (__get_user(usec
, &i
->tv_usec
))
181 o
->tv_nsec
= usec
* 1000;
185 static inline long put_tv32(struct compat_timeval __user
*o
, struct timeval
*i
)
187 return (!access_ok(VERIFY_WRITE
, o
, sizeof(*o
)) ||
188 (__put_user(i
->tv_sec
, &o
->tv_sec
) |
189 __put_user(i
->tv_usec
, &o
->tv_usec
)));
201 unsigned short procs
;
206 char _f
[20-2*sizeof(int)-sizeof(int)];
209 asmlinkage
long compat_sys_sysinfo(struct sysinfo32 __user
*info
)
214 mm_segment_t old_fs
= get_fs ();
216 /* The __user cast is valid due to set_fs() */
218 ret
= sys_sysinfo((struct sysinfo __user
*)&s
);
221 /* Check to see if any memory value is too large for 32-bit and
222 * scale down if needed.
224 if ((s
.totalram
>> 32) || (s
.totalswap
>> 32)) {
225 while (s
.mem_unit
< PAGE_SIZE
) {
229 s
.totalram
>>=bitcount
;
230 s
.freeram
>>= bitcount
;
231 s
.sharedram
>>= bitcount
;
232 s
.bufferram
>>= bitcount
;
233 s
.totalswap
>>= bitcount
;
234 s
.freeswap
>>= bitcount
;
235 s
.totalhigh
>>= bitcount
;
236 s
.freehigh
>>= bitcount
;
239 err
= put_user (s
.uptime
, &info
->uptime
);
240 err
|= __put_user (s
.loads
[0], &info
->loads
[0]);
241 err
|= __put_user (s
.loads
[1], &info
->loads
[1]);
242 err
|= __put_user (s
.loads
[2], &info
->loads
[2]);
243 err
|= __put_user (s
.totalram
, &info
->totalram
);
244 err
|= __put_user (s
.freeram
, &info
->freeram
);
245 err
|= __put_user (s
.sharedram
, &info
->sharedram
);
246 err
|= __put_user (s
.bufferram
, &info
->bufferram
);
247 err
|= __put_user (s
.totalswap
, &info
->totalswap
);
248 err
|= __put_user (s
.freeswap
, &info
->freeswap
);
249 err
|= __put_user (s
.procs
, &info
->procs
);
250 err
|= __put_user (s
.totalhigh
, &info
->totalhigh
);
251 err
|= __put_user (s
.freehigh
, &info
->freehigh
);
252 err
|= __put_user (s
.mem_unit
, &info
->mem_unit
);
262 /* Translations due to time_t size differences. Which affects all
263 sorts of things, like timeval and itimerval. */
264 extern struct timezone sys_tz
;
266 asmlinkage
long compat_sys_gettimeofday(struct compat_timeval __user
*tv
, struct timezone __user
*tz
)
270 do_gettimeofday(&ktv
);
271 if (put_tv32(tv
, &ktv
))
275 if (copy_to_user(tz
, &sys_tz
, sizeof(sys_tz
)))
284 asmlinkage
long compat_sys_settimeofday(struct compat_timeval __user
*tv
, struct timezone __user
*tz
)
290 if (get_ts32(&kts
, tv
))
294 if (copy_from_user(&ktz
, tz
, sizeof(ktz
)))
298 return do_sys_settimeofday(tv
? &kts
: NULL
, tz
? &ktz
: NULL
);
301 #ifdef CONFIG_SYSVIPC
302 long compat_sys_ipc(u32 call
, u32 first
, u32 second
, u32 third
, compat_uptr_t ptr
,
307 version
= call
>> 16; /* hack for backward compatibility */
314 /* sign extend semid */
315 return compat_sys_semtimedop((int)first
,
316 compat_ptr(ptr
), second
,
318 /* else fall through for normal semop() */
320 /* struct sembuf is the same on 32 and 64bit :)) */
321 /* sign extend semid */
322 return sys_semtimedop((int)first
, compat_ptr(ptr
), second
,
325 /* sign extend key, nsems */
326 return sys_semget((int)first
, (int)second
, third
);
328 /* sign extend semid, semnum */
329 return compat_sys_semctl((int)first
, (int)second
, third
,
333 /* sign extend msqid */
334 return compat_sys_msgsnd((int)first
, (int)second
, third
,
337 /* sign extend msqid, msgtyp */
338 return compat_sys_msgrcv((int)first
, second
, (int)fifth
,
339 third
, version
, compat_ptr(ptr
));
341 /* sign extend key */
342 return sys_msgget((int)first
, second
);
344 /* sign extend msqid */
345 return compat_sys_msgctl((int)first
, second
, compat_ptr(ptr
));
348 /* sign extend shmid */
349 return compat_sys_shmat((int)first
, second
, third
, version
,
352 return sys_shmdt(compat_ptr(ptr
));
354 /* sign extend key_t */
355 return sys_shmget((int)first
, second
, third
);
357 /* sign extend shmid */
358 return compat_sys_shmctl((int)first
, second
, compat_ptr(ptr
));
368 /* Note: it is necessary to treat out_fd and in_fd as unsigned ints,
369 * with the corresponding cast to a signed int to insure that the
370 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
371 * and the register representation of a signed int (msr in 64-bit mode) is performed.
373 asmlinkage
long compat_sys_sendfile(u32 out_fd
, u32 in_fd
, compat_off_t __user
* offset
, u32 count
)
375 mm_segment_t old_fs
= get_fs();
380 if (offset
&& get_user(of
, offset
))
383 /* The __user pointer cast is valid because of the set_fs() */
385 up
= offset
? (off_t __user
*) &of
: NULL
;
386 ret
= sys_sendfile((int)out_fd
, (int)in_fd
, up
, count
);
389 if (offset
&& put_user(of
, offset
))
395 asmlinkage
int compat_sys_sendfile64(int out_fd
, int in_fd
, compat_loff_t __user
*offset
, s32 count
)
397 mm_segment_t old_fs
= get_fs();
402 if (offset
&& get_user(lof
, offset
))
405 /* The __user pointer cast is valid because of the set_fs() */
407 up
= offset
? (loff_t __user
*) &lof
: NULL
;
408 ret
= sys_sendfile64(out_fd
, in_fd
, up
, count
);
411 if (offset
&& put_user(lof
, offset
))
417 long compat_sys_execve(unsigned long a0
, unsigned long a1
, unsigned long a2
,
418 unsigned long a3
, unsigned long a4
, unsigned long a5
,
419 struct pt_regs
*regs
)
424 filename
= getname((char __user
*) a0
);
425 error
= PTR_ERR(filename
);
426 if (IS_ERR(filename
))
428 flush_fp_to_thread(current
);
429 flush_altivec_to_thread(current
);
431 error
= compat_do_execve(filename
, compat_ptr(a1
), compat_ptr(a2
), regs
);
435 current
->ptrace
&= ~PT_DTRACE
;
436 task_unlock(current
);
444 /* Note: it is necessary to treat option as an unsigned int,
445 * with the corresponding cast to a signed int to insure that the
446 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
447 * and the register representation of a signed int (msr in 64-bit mode) is performed.
449 asmlinkage
long compat_sys_prctl(u32 option
, u32 arg2
, u32 arg3
, u32 arg4
, u32 arg5
)
451 return sys_prctl((int)option
,
452 (unsigned long) arg2
,
453 (unsigned long) arg3
,
454 (unsigned long) arg4
,
455 (unsigned long) arg5
);
458 /* Note: it is necessary to treat pid as an unsigned int,
459 * with the corresponding cast to a signed int to insure that the
460 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
461 * and the register representation of a signed int (msr in 64-bit mode) is performed.
463 asmlinkage
long compat_sys_sched_rr_get_interval(u32 pid
, struct compat_timespec __user
*interval
)
467 mm_segment_t old_fs
= get_fs ();
469 /* The __user pointer cast is valid because of the set_fs() */
471 ret
= sys_sched_rr_get_interval((int)pid
, (struct timespec __user
*) &t
);
473 if (put_compat_timespec(&t
, interval
))
478 /* Note: it is necessary to treat mode as an unsigned int,
479 * with the corresponding cast to a signed int to insure that the
480 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
481 * and the register representation of a signed int (msr in 64-bit mode) is performed.
483 asmlinkage
long compat_sys_access(const char __user
* filename
, u32 mode
)
485 return sys_access(filename
, (int)mode
);
489 /* Note: it is necessary to treat mode as an unsigned int,
490 * with the corresponding cast to a signed int to insure that the
491 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
492 * and the register representation of a signed int (msr in 64-bit mode) is performed.
494 asmlinkage
long compat_sys_creat(const char __user
* pathname
, u32 mode
)
496 return sys_creat(pathname
, (int)mode
);
500 /* Note: it is necessary to treat pid and options as unsigned ints,
501 * with the corresponding cast to a signed int to insure that the
502 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
503 * and the register representation of a signed int (msr in 64-bit mode) is performed.
505 asmlinkage
long compat_sys_waitpid(u32 pid
, unsigned int __user
* stat_addr
, u32 options
)
507 return sys_waitpid((int)pid
, stat_addr
, (int)options
);
511 /* Note: it is necessary to treat gidsetsize as an unsigned int,
512 * with the corresponding cast to a signed int to insure that the
513 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
514 * and the register representation of a signed int (msr in 64-bit mode) is performed.
516 asmlinkage
long compat_sys_getgroups(u32 gidsetsize
, gid_t __user
*grouplist
)
518 return sys_getgroups((int)gidsetsize
, grouplist
);
522 /* Note: it is necessary to treat pid as an unsigned int,
523 * with the corresponding cast to a signed int to insure that the
524 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
525 * and the register representation of a signed int (msr in 64-bit mode) is performed.
527 asmlinkage
long compat_sys_getpgid(u32 pid
)
529 return sys_getpgid((int)pid
);
534 /* Note: it is necessary to treat pid as an unsigned int,
535 * with the corresponding cast to a signed int to insure that the
536 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
537 * and the register representation of a signed int (msr in 64-bit mode) is performed.
539 asmlinkage
long compat_sys_getsid(u32 pid
)
541 return sys_getsid((int)pid
);
545 /* Note: it is necessary to treat pid and sig as unsigned ints,
546 * with the corresponding cast to a signed int to insure that the
547 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
548 * and the register representation of a signed int (msr in 64-bit mode) is performed.
550 asmlinkage
long compat_sys_kill(u32 pid
, u32 sig
)
552 return sys_kill((int)pid
, (int)sig
);
556 /* Note: it is necessary to treat mode as an unsigned int,
557 * with the corresponding cast to a signed int to insure that the
558 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
559 * and the register representation of a signed int (msr in 64-bit mode) is performed.
561 asmlinkage
long compat_sys_mkdir(const char __user
* pathname
, u32 mode
)
563 return sys_mkdir(pathname
, (int)mode
);
566 long compat_sys_nice(u32 increment
)
568 /* sign extend increment */
569 return sys_nice((int)increment
);
572 off_t
ppc32_lseek(unsigned int fd
, u32 offset
, unsigned int origin
)
575 return sys_lseek(fd
, (int)offset
, origin
);
578 /* Note: it is necessary to treat bufsiz as an unsigned int,
579 * with the corresponding cast to a signed int to insure that the
580 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
581 * and the register representation of a signed int (msr in 64-bit mode) is performed.
583 asmlinkage
long compat_sys_readlink(const char __user
* path
, char __user
* buf
, u32 bufsiz
)
585 return sys_readlink(path
, buf
, (int)bufsiz
);
588 /* Note: it is necessary to treat option as an unsigned int,
589 * with the corresponding cast to a signed int to insure that the
590 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
591 * and the register representation of a signed int (msr in 64-bit mode) is performed.
593 asmlinkage
long compat_sys_sched_get_priority_max(u32 policy
)
595 return sys_sched_get_priority_max((int)policy
);
599 /* Note: it is necessary to treat policy as an unsigned int,
600 * with the corresponding cast to a signed int to insure that the
601 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
602 * and the register representation of a signed int (msr in 64-bit mode) is performed.
604 asmlinkage
long compat_sys_sched_get_priority_min(u32 policy
)
606 return sys_sched_get_priority_min((int)policy
);
610 /* Note: it is necessary to treat pid as an unsigned int,
611 * with the corresponding cast to a signed int to insure that the
612 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
613 * and the register representation of a signed int (msr in 64-bit mode) is performed.
615 asmlinkage
long compat_sys_sched_getparam(u32 pid
, struct sched_param __user
*param
)
617 return sys_sched_getparam((int)pid
, param
);
621 /* Note: it is necessary to treat pid as an unsigned int,
622 * with the corresponding cast to a signed int to insure that the
623 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
624 * and the register representation of a signed int (msr in 64-bit mode) is performed.
626 asmlinkage
long compat_sys_sched_getscheduler(u32 pid
)
628 return sys_sched_getscheduler((int)pid
);
632 /* Note: it is necessary to treat pid as an unsigned int,
633 * with the corresponding cast to a signed int to insure that the
634 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
635 * and the register representation of a signed int (msr in 64-bit mode) is performed.
637 asmlinkage
long compat_sys_sched_setparam(u32 pid
, struct sched_param __user
*param
)
639 return sys_sched_setparam((int)pid
, param
);
643 /* Note: it is necessary to treat pid and policy as unsigned ints,
644 * with the corresponding cast to a signed int to insure that the
645 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
646 * and the register representation of a signed int (msr in 64-bit mode) is performed.
648 asmlinkage
long compat_sys_sched_setscheduler(u32 pid
, u32 policy
, struct sched_param __user
*param
)
650 return sys_sched_setscheduler((int)pid
, (int)policy
, param
);
654 /* Note: it is necessary to treat len as an unsigned int,
655 * with the corresponding cast to a signed int to insure that the
656 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
657 * and the register representation of a signed int (msr in 64-bit mode) is performed.
659 asmlinkage
long compat_sys_setdomainname(char __user
*name
, u32 len
)
661 return sys_setdomainname(name
, (int)len
);
665 /* Note: it is necessary to treat gidsetsize as an unsigned int,
666 * with the corresponding cast to a signed int to insure that the
667 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
668 * and the register representation of a signed int (msr in 64-bit mode) is performed.
670 asmlinkage
long compat_sys_setgroups(u32 gidsetsize
, gid_t __user
*grouplist
)
672 return sys_setgroups((int)gidsetsize
, grouplist
);
676 asmlinkage
long compat_sys_sethostname(char __user
*name
, u32 len
)
678 /* sign extend len */
679 return sys_sethostname(name
, (int)len
);
683 /* Note: it is necessary to treat pid and pgid as unsigned ints,
684 * with the corresponding cast to a signed int to insure that the
685 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
686 * and the register representation of a signed int (msr in 64-bit mode) is performed.
688 asmlinkage
long compat_sys_setpgid(u32 pid
, u32 pgid
)
690 return sys_setpgid((int)pid
, (int)pgid
);
693 long compat_sys_getpriority(u32 which
, u32 who
)
695 /* sign extend which and who */
696 return sys_getpriority((int)which
, (int)who
);
699 long compat_sys_setpriority(u32 which
, u32 who
, u32 niceval
)
701 /* sign extend which, who and niceval */
702 return sys_setpriority((int)which
, (int)who
, (int)niceval
);
705 long compat_sys_ioprio_get(u32 which
, u32 who
)
707 /* sign extend which and who */
708 return sys_ioprio_get((int)which
, (int)who
);
711 long compat_sys_ioprio_set(u32 which
, u32 who
, u32 ioprio
)
713 /* sign extend which, who and ioprio */
714 return sys_ioprio_set((int)which
, (int)who
, (int)ioprio
);
717 /* Note: it is necessary to treat newmask as an unsigned int,
718 * with the corresponding cast to a signed int to insure that the
719 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
720 * and the register representation of a signed int (msr in 64-bit mode) is performed.
722 asmlinkage
long compat_sys_ssetmask(u32 newmask
)
724 return sys_ssetmask((int) newmask
);
727 asmlinkage
long compat_sys_syslog(u32 type
, char __user
* buf
, u32 len
)
729 /* sign extend len */
730 return sys_syslog(type
, buf
, (int)len
);
734 /* Note: it is necessary to treat mask as an unsigned int,
735 * with the corresponding cast to a signed int to insure that the
736 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
737 * and the register representation of a signed int (msr in 64-bit mode) is performed.
739 asmlinkage
long compat_sys_umask(u32 mask
)
741 return sys_umask((int)mask
);
745 struct __sysctl_args32
{
755 asmlinkage
long compat_sys_sysctl(struct __sysctl_args32 __user
*args
)
757 struct __sysctl_args32 tmp
;
760 size_t __user
*oldlenp
= NULL
;
761 unsigned long addr
= (((unsigned long)&args
->__unused
[0]) + 7) & ~7;
763 if (copy_from_user(&tmp
, args
, sizeof(tmp
)))
766 if (tmp
.oldval
&& tmp
.oldlenp
) {
767 /* Duh, this is ugly and might not work if sysctl_args
768 is in read-only memory, but do_sysctl does indirectly
769 a lot of uaccess in both directions and we'd have to
770 basically copy the whole sysctl.c here, and
771 glibc's __sysctl uses rw memory for the structure
773 oldlenp
= (size_t __user
*)addr
;
774 if (get_user(oldlen
, (compat_size_t __user
*)compat_ptr(tmp
.oldlenp
)) ||
775 put_user(oldlen
, oldlenp
))
780 error
= do_sysctl(compat_ptr(tmp
.name
), tmp
.nlen
,
781 compat_ptr(tmp
.oldval
), oldlenp
,
782 compat_ptr(tmp
.newval
), tmp
.newlen
);
786 if (get_user(oldlen
, oldlenp
) ||
787 put_user(oldlen
, (compat_size_t __user
*)compat_ptr(tmp
.oldlenp
)))
790 copy_to_user(args
->__unused
, tmp
.__unused
, sizeof(tmp
.__unused
));
796 unsigned long compat_sys_mmap2(unsigned long addr
, size_t len
,
797 unsigned long prot
, unsigned long flags
,
798 unsigned long fd
, unsigned long pgoff
)
800 /* This should remain 12 even if PAGE_SIZE changes */
801 return sys_mmap(addr
, len
, prot
, flags
, fd
, pgoff
<< 12);
804 long compat_sys_tgkill(u32 tgid
, u32 pid
, int sig
)
806 /* sign extend tgid, pid */
807 return sys_tgkill((int)tgid
, (int)pid
, sig
);
812 * The 32 bit ABI passes long longs in an odd even register pair.
815 compat_ssize_t
compat_sys_pread64(unsigned int fd
, char __user
*ubuf
, compat_size_t count
,
816 u32 reg6
, u32 poshi
, u32 poslo
)
818 return sys_pread64(fd
, ubuf
, count
, ((loff_t
)poshi
<< 32) | poslo
);
821 compat_ssize_t
compat_sys_pwrite64(unsigned int fd
, char __user
*ubuf
, compat_size_t count
,
822 u32 reg6
, u32 poshi
, u32 poslo
)
824 return sys_pwrite64(fd
, ubuf
, count
, ((loff_t
)poshi
<< 32) | poslo
);
827 compat_ssize_t
compat_sys_readahead(int fd
, u32 r4
, u32 offhi
, u32 offlo
, u32 count
)
829 return sys_readahead(fd
, ((loff_t
)offhi
<< 32) | offlo
, count
);
832 asmlinkage
int compat_sys_truncate64(const char __user
* path
, u32 reg4
,
833 unsigned long high
, unsigned long low
)
835 return sys_truncate(path
, (high
<< 32) | low
);
838 asmlinkage
int compat_sys_ftruncate64(unsigned int fd
, u32 reg4
, unsigned long high
,
841 return sys_ftruncate(fd
, (high
<< 32) | low
);
844 long ppc32_lookup_dcookie(u32 cookie_high
, u32 cookie_low
, char __user
*buf
,
847 return sys_lookup_dcookie((u64
)cookie_high
<< 32 | cookie_low
,
851 long ppc32_fadvise64(int fd
, u32 unused
, u32 offset_high
, u32 offset_low
,
852 size_t len
, int advice
)
854 return sys_fadvise64(fd
, (u64
)offset_high
<< 32 | offset_low
, len
,
858 asmlinkage
long compat_sys_add_key(const char __user
*_type
,
859 const char __user
*_description
,
860 const void __user
*_payload
,
864 return sys_add_key(_type
, _description
, _payload
, plen
, ringid
);
867 asmlinkage
long compat_sys_request_key(const char __user
*_type
,
868 const char __user
*_description
,
869 const char __user
*_callout_info
,
872 return sys_request_key(_type
, _description
, _callout_info
, destringid
);