/*
* sys_ppc32.c: Conversion between 32bit and 64bit native syscalls.
*
* Copyright (C) 2001 IBM
* Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
* Copyright (C) 1997 David S. Miller (davem@caip.rutgers.edu)
*
* These routines maintain argument size conversion between 32bit and 64bit
* environment.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*/
#include <linux/config.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/fs.h>
#include <linux/mm.h>
#include <linux/file.h>
#include <linux/signal.h>
#include <linux/resource.h>
#include <linux/times.h>
#include <linux/utsname.h>
#include <linux/smp.h>
#include <linux/smp_lock.h>
#include <linux/sem.h>
#include <linux/msg.h>
#include <linux/shm.h>
#include <linux/poll.h>
#include <linux/personality.h>
#include <linux/stat.h>
#include <linux/mman.h>
#include <linux/in.h>
#include <linux/syscalls.h>
#include <linux/unistd.h>
#include <linux/sysctl.h>
#include <linux/binfmts.h>
#include <linux/security.h>
#include <linux/compat.h>
#include <linux/ptrace.h>
#include <linux/elf.h>
#include <asm/ptrace.h>
#include <asm/types.h>
#include <asm/ipc.h>
#include <asm/uaccess.h>
#include <asm/unistd.h>
#include <asm/semaphore.h>
#include <asm/time.h>
#include <asm/mmu_context.h>
#include <asm/ppc-pci.h>
/* readdir & getdents */
#define NAME_OFFSET(de) ((int) ((de)->d_name - (char __user *) (de)))
#define ROUND_UP(x) (((x)+sizeof(u32)-1) & ~(sizeof(u32)-1))
struct old_linux_dirent32 {
u32 d_ino;
u32 d_offset;
unsigned short d_namlen;
char d_name[1];
};
struct readdir_callback32 {
struct old_linux_dirent32 __user * dirent;
int count;
};
static int fillonedir(void * __buf, const char * name, int namlen,
off_t offset, ino_t ino, unsigned int d_type)
{
struct readdir_callback32 * buf = (struct readdir_callback32 *) __buf;
struct old_linux_dirent32 __user * dirent;
if (buf->count)
return -EINVAL;
buf->count++;
dirent = buf->dirent;
put_user(ino, &dirent->d_ino);
put_user(offset, &dirent->d_offset);
put_user(namlen, &dirent->d_namlen);
copy_to_user(dirent->d_name, name, namlen);
put_user(0, dirent->d_name + namlen);
return 0;
}
asmlinkage int old32_readdir(unsigned int fd, struct old_linux_dirent32 __user *dirent, unsigned int count)
{
int error = -EBADF;
struct file * file;
struct readdir_callback32 buf;
file = fget(fd);
if (!file)
goto out;
buf.count = 0;
buf.dirent = dirent;
error = vfs_readdir(file, (filldir_t)fillonedir, &buf);
if (error < 0)
goto out_putf;
error = buf.count;
out_putf:
fput(file);
out:
return error;
}
asmlinkage long ppc32_select(u32 n, compat_ulong_t __user *inp,
compat_ulong_t __user *outp, compat_ulong_t __user *exp,
compat_uptr_t tvp_x)
{
/* sign extend n */
return compat_sys_select((int)n, inp, outp, exp, compat_ptr(tvp_x));
}
int cp_compat_stat(struct kstat *stat, struct compat_stat __user *statbuf)
{
long err;
if (stat->size > MAX_NON_LFS || !new_valid_dev(stat->dev) ||
!new_valid_dev(stat->rdev))
return -EOVERFLOW;
err = access_ok(VERIFY_WRITE, statbuf, sizeof(*statbuf)) ? 0 : -EFAULT;
err |= __put_user(new_encode_dev(stat->dev), &statbuf->st_dev);
err |= __put_user(stat->ino, &statbuf->st_ino);
err |= __put_user(stat->mode, &statbuf->st_mode);
err |= __put_user(stat->nlink, &statbuf->st_nlink);
err |= __put_user(stat->uid, &statbuf->st_uid);
err |= __put_user(stat->gid, &statbuf->st_gid);
err |= __put_user(new_encode_dev(stat->rdev), &statbuf->st_rdev);
err |= __put_user(stat->size, &statbuf->st_size);
err |= __put_user(stat->atime.tv_sec, &statbuf->st_atime);
err |= __put_user(stat->atime.tv_nsec, &statbuf->st_atime_nsec);
err |= __put_user(stat->mtime.tv_sec, &statbuf->st_mtime);
err |= __put_user(stat->mtime.tv_nsec, &statbuf->st_mtime_nsec);
err |= __put_user(stat->ctime.tv_sec, &statbuf->st_ctime);
err |= __put_user(stat->ctime.tv_nsec, &statbuf->st_ctime_nsec);
err |= __put_user(stat->blksize, &statbuf->st_blksize);
err |= __put_user(stat->blocks, &statbuf->st_blocks);
err |= __put_user(0, &statbuf->__unused4[0]);
err |= __put_user(0, &statbuf->__unused4[1]);
return err;
}
/* Note: it is necessary to treat option as an unsigned int,
* with the corresponding cast to a signed int to insure that the
* proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
* and the register representation of a signed int (msr in 64-bit mode) is performed.
*/
asmlinkage long compat_sys_sysfs(u32 option, u32 arg1, u32 arg2)
{
return sys_sysfs((int)option, arg1, arg2);
}
asmlinkage long compat_sys_pause(void)
{
current->state = TASK_INTERRUPTIBLE;
schedule();
return -ERESTARTNOHAND;
}
static inline long get_ts32(struct timespec *o, struct compat_timeval __user *i)
{
long usec;
if (!access_ok(VERIFY_READ, i, sizeof(*i)))
return -EFAULT;
if (__get_user(o->tv_sec, &i->tv_sec))
return -EFAULT;
if (__get_user(usec, &i->tv_usec))
return -EFAULT;
o->tv_nsec = usec * 1000;
return 0;
}
static inline long put_tv32(struct compat_timeval __user *o, struct timeval *i)
{
return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) ||
(__put_user(i->tv_sec, &o->tv_sec) |
__put_user(i->tv_usec, &o->tv_usec)));
}
struct sysinfo32 {
s32 uptime;
u32 loads[3];
u32 totalram;
u32 freeram;
u32 sharedram;
u32 bufferram;
u32 totalswap;
u32 freeswap;
unsigned short procs;
unsigned short pad;
u32 totalhigh;
u32 freehigh;
u32 mem_unit;
char _f[20-2*sizeof(int)-sizeof(int)];
};
asmlinkage long compat_sys_sysinfo(struct sysinfo32 __user *info)
{
struct sysinfo s;
int ret, err;
int bitcount=0;
mm_segment_t old_fs = get_fs ();
/* The __user cast is valid due to set_fs() */
set_fs (KERNEL_DS);
ret = sys_sysinfo((struct sysinfo __user *)&s);
set_fs (old_fs);
/* Check to see if any memory value is too large for 32-bit and
* scale down if needed.
*/
if ((s.totalram >> 32) || (s.totalswap >> 32)) {
while (s.mem_unit < PAGE_SIZE) {
s.mem_unit <<= 1;
bitcount++;
}
s.totalram >>=bitcount;
s.freeram >>= bitcount;
s.sharedram >>= bitcount;
s.bufferram >>= bitcount;
s.totalswap >>= bitcount;
s.freeswap >>= bitcount;
s.totalhigh >>= bitcount;
s.freehigh >>= bitcount;
}
err = put_user (s.uptime, &info->uptime);
err |= __put_user (s.loads[0], &info->loads[0]);
err |= __put_user (s.loads[1], &info->loads[1]);
err |= __put_user (s.loads[2], &info->loads[2]);
err |= __put_user (s.totalram, &info->totalram);
err |= __put_user (s.freeram, &info->freeram);
err |= __put_user (s.sharedram, &info->sharedram);
err |= __put_user (s.bufferram, &info->bufferram);
err |= __put_user (s.totalswap, &info->totalswap);
err |= __put_user (s.freeswap, &info->freeswap);
err |= __put_user (s.procs, &info->procs);
err |= __put_user (s.totalhigh, &info->totalhigh);
err |= __put_user (s.freehigh, &info->freehigh);
err |= __put_user (s.mem_unit, &info->mem_unit);
if (err)
return -EFAULT;
return ret;
}
/* Translations due to time_t size differences. Which affects all
sorts of things, like timeval and itimerval. */
extern struct timezone sys_tz;
asmlinkage long compat_sys_gettimeofday(struct compat_timeval __user *tv, struct timezone __user *tz)
{
if (tv) {
struct timeval ktv;
do_gettimeofday(&ktv);
if (put_tv32(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 (get_ts32(&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);
}
#ifdef CONFIG_SYSVIPC
long compat_sys_ipc(u32 call, u32 first, u32 second, u32 third, compat_uptr_t ptr,
u32 fifth)
{
int version;
version = call >> 16; /* hack for backward compatibility */
call &= 0xffff;
switch (call) {
case SEMTIMEDOP:
if (fifth)
/* sign extend semid */
return compat_sys_semtimedop((int)first,
compat_ptr(ptr), second,
compat_ptr(fifth));
/* else fall through for normal semop() */
case SEMOP:
/* struct sembuf is the same on 32 and 64bit :)) */
/* sign extend semid */
return sys_semtimedop((int)first, compat_ptr(ptr), second,
NULL);
case SEMGET:
/* sign extend key, nsems */
return sys_semget((int)first, (int)second, third);
case SEMCTL:
/* sign extend semid, semnum */
return compat_sys_semctl((int)first, (int)second, third,
compat_ptr(ptr));
case MSGSND:
/* sign extend msqid */
return compat_sys_msgsnd((int)first, (int)second, third,
compat_ptr(ptr));
case MSGRCV:
/* sign extend msqid, msgtyp */
return compat_sys_msgrcv((int)first, second, (int)fifth,
third, version, compat_ptr(ptr));
case MSGGET:
/* sign extend key */
return sys_msgget((int)first, second);
case MSGCTL:
/* sign extend msqid */
return compat_sys_msgctl((int)first, second, compat_ptr(ptr));
case SHMAT:
/* sign extend shmid */
return compat_sys_shmat((int)first, second, third, version,
compat_ptr(ptr));
case SHMDT:
return sys_shmdt(compat_ptr(ptr));
case SHMGET:
/* sign extend key_t */
return sys_shmget((int)first, second, third);
case SHMCTL:
/* sign extend shmid */
return compat_sys_shmctl((int)first, second, compat_ptr(ptr));
default:
return -ENOSYS;
}
return -ENOSYS;
}
#endif
/* Note: it is necessary to treat out_fd and in_fd as unsigned ints,
* with the corresponding cast to a signed int to insure that the
* proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
* and the register representation of a signed int (msr in 64-bit mode) is performed.
*/
asmlinkage long compat_sys_sendfile(u32 out_fd, u32 in_fd, compat_off_t __user * offset, u32 count)
{
mm_segment_t old_fs = get_fs();
int ret;
off_t of;
off_t __user *up;
if (offset && get_user(of, offset))
return -EFAULT;
/* The __user pointer cast is valid because of the set_fs() */
set_fs(KERNEL_DS);
up = offset ? (off_t __user *) &of : NULL;
ret = sys_sendfile((int)out_fd, (int)in_fd, up, count);
set_fs(old_fs);
if (offset && put_user(of, offset))
return -EFAULT;
return ret;
}
asmlinkage int compat_sys_sendfile64(int out_fd, int in_fd, compat_loff_t __user *offset, s32 count)
{
mm_segment_t old_fs = get_fs();
int ret;
loff_t lof;
loff_t __user *up;
if (offset && get_user(lof, offset))
return -EFAULT;
/* The __user pointer cast is valid because of the set_fs() */
set_fs(KERNEL_DS);
up = offset ? (loff_t __user *) &lof : NULL;
ret = sys_sendfile64(out_fd, in_fd, up, count);
set_fs(old_fs);
if (offset && put_user(lof, offset))
return -EFAULT;
return ret;
}
long compat_sys_execve(unsigned long a0, unsigned long a1, unsigned long a2,
unsigned long a3, unsigned long a4, unsigned long a5,
struct pt_regs *regs)
{
int error;
char * filename;
filename = getname((char __user *) a0);
error = PTR_ERR(filename);
if (IS_ERR(filename))
goto out;
flush_fp_to_thread(current);
flush_altivec_to_thread(current);
error = compat_do_execve(filename, compat_ptr(a1), compat_ptr(a2), regs);
if (error == 0) {
task_lock(current);
current->ptrace &= ~PT_DTRACE;
task_unlock(current);
}
putname(filename);
out:
return error;
}
/* Note: it is necessary to treat option as an unsigned int,
* with the corresponding cast to a signed int to insure that the
* proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
* and the register representation of a signed int (msr in 64-bit mode) is performed.
*/
asmlinkage long compat_sys_prctl(u32 option, u32 arg2, u32 arg3, u32 arg4, u32 arg5)
{
return sys_prctl((int)option,
(unsigned long) arg2,
(unsigned long) arg3,
(unsigned long) arg4,
(unsigned long) arg5);
}
/* Note: it is necessary to treat pid as an unsigned int,
* with the corresponding cast to a signed int to insure that the
* proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
* and the register representation of a signed int (msr in 64-bit mode) is performed.
*/
asmlinkage long compat_sys_sched_rr_get_interval(u32 pid, struct compat_timespec __user *interval)
{
struct timespec t;
int ret;
mm_segment_t old_fs = get_fs ();
/* The __user pointer cast is valid because of the set_fs() */
set_fs (KERNEL_DS);
ret = sys_sched_rr_get_interval((int)pid, (struct timespec __user *) &t);
set_fs (old_fs);
if (put_compat_timespec(&t, interval))
return -EFAULT;
return ret;
}
/* Note: it is necessary to treat mode as an unsigned int,
* with the corresponding cast to a signed int to insure that the
* proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
* and the register representation of a signed int (msr in 64-bit mode) is performed.
*/
asmlinkage long compat_sys_access(const char __user * filename, u32 mode)
{
return sys_access(filename, (int)mode);
}
/* Note: it is necessary to treat mode as an unsigned int,
* with the corresponding cast to a signed int to insure that the
* proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
* and the register representation of a signed int (msr in 64-bit mode) is performed.
*/
asmlinkage long compat_sys_creat(const char __user * pathname, u32 mode)
{
return sys_creat(pathname, (int)mode);
}
/* Note: it is necessary to treat pid and options as unsigned ints,
* with the corresponding cast to a signed int to insure that the
* proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
* and the register representation of a signed int (msr in 64-bit mode) is performed.
*/
asmlinkage long compat_sys_waitpid(u32 pid, unsigned int __user * stat_addr, u32 options)
{
return sys_waitpid((int)pid, stat_addr, (int)options);
}
/* Note: it is necessary to treat gidsetsize as an unsigned int,
* with the corresponding cast to a signed int to insure that the
* proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
* and the register representation of a signed int (msr in 64-bit mode) is performed.
*/
asmlinkage long compat_sys_getgroups(u32 gidsetsize, gid_t __user *grouplist)
{
return sys_getgroups((int)gidsetsize, grouplist);
}
/* Note: it is necessary to treat pid as an unsigned int,
* with the corresponding cast to a signed int to insure that the
* proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
* and the register representation of a signed int (msr in 64-bit mode) is performed.
*/
asmlinkage long compat_sys_getpgid(u32 pid)
{
return sys_getpgid((int)pid);
}
/* Note: it is necessary to treat pid as an unsigned int,
* with the corresponding cast to a signed int to insure that the
* proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
* and the register representation of a signed int (msr in 64-bit mode) is performed.
*/
asmlinkage long compat_sys_getsid(u32 pid)
{
return sys_getsid((int)pid);
}
/* Note: it is necessary to treat pid and sig as unsigned ints,
* with the corresponding cast to a signed int to insure that the
* proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
* and the register representation of a signed int (msr in 64-bit mode) is performed.
*/
asmlinkage long compat_sys_kill(u32 pid, u32 sig)
{
return sys_kill((int)pid, (int)sig);
}
/* Note: it is necessary to treat mode as an unsigned int,
* with the corresponding cast to a signed int to insure that the
* proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
* and the register representation of a signed int (msr in 64-bit mode) is performed.
*/
asmlinkage long compat_sys_mkdir(const char __user * pathname, u32 mode)
{
return sys_mkdir(pathname, (int)mode);
}
long compat_sys_nice(u32 increment)
{
/* sign extend increment */
return sys_nice((int)increment);
}
off_t ppc32_lseek(unsigned int fd, u32 offset, unsigned int origin)
{
/* sign extend n */
return sys_lseek(fd, (int)offset, origin);
}
/* Note: it is necessary to treat bufsiz as an unsigned int,
* with the corresponding cast to a signed int to insure that the
* proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
* and the register representation of a signed int (msr in 64-bit mode) is performed.
*/
asmlinkage long compat_sys_readlink(const char __user * path, char __user * buf, u32 bufsiz)
{
return sys_readlink(path, buf, (int)bufsiz);
}
/* Note: it is necessary to treat option as an unsigned int,
* with the corresponding cast to a signed int to insure that the
* proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
* and the register representation of a signed int (msr in 64-bit mode) is performed.
*/
asmlinkage long compat_sys_sched_get_priority_max(u32 policy)
{
return sys_sched_get_priority_max((int)policy);
}
/* Note: it is necessary to treat policy as an unsigned int,
* with the corresponding cast to a signed int to insure that the
* proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
* and the register representation of a signed int (msr in 64-bit mode) is performed.
*/
asmlinkage long compat_sys_sched_get_priority_min(u32 policy)
{
return sys_sched_get_priority_min((int)policy);
}
/* Note: it is necessary to treat pid as an unsigned int,
* with the corresponding cast to a signed int to insure that the
* proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
* and the register representation of a signed int (msr in 64-bit mode) is performed.
*/
asmlinkage long compat_sys_sched_getparam(u32 pid, struct sched_param __user *param)
{
return sys_sched_getparam((int)pid, param);
}
/* Note: it is necessary to treat pid as an unsigned int,
* with the corresponding cast to a signed int to insure that the
* proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
* and the register representation of a signed int (msr in 64-bit mode) is performed.
*/
asmlinkage long compat_sys_sched_getscheduler(u32 pid)
{
return sys_sched_getscheduler((int)pid);
}
/* Note: it is necessary to treat pid as an unsigned int,
* with the corresponding cast to a signed int to insure that the
* proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
* and the register representation of a signed int (msr in 64-bit mode) is performed.
*/
asmlinkage long compat_sys_sched_setparam(u32 pid, struct sched_param __user *param)
{
return sys_sched_setparam((int)pid, param);
}
/* Note: it is necessary to treat pid and policy as unsigned ints,
* with the corresponding cast to a signed int to insure that the
* proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
* and the register representation of a signed int (msr in 64-bit mode) is performed.
*/
asmlinkage long compat_sys_sched_setscheduler(u32 pid, u32 policy, struct sched_param __user *param)
{
return sys_sched_setscheduler((int)pid, (int)policy, param);
}
/* Note: it is necessary to treat len as an unsigned int,
* with the corresponding cast to a signed int to insure that the
* proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
* and the register representation of a signed int (msr in 64-bit mode) is performed.
*/
asmlinkage long compat_sys_setdomainname(char __user *name, u32 len)
{
return sys_setdomainname(name, (int)len);
}
/* Note: it is necessary to treat gidsetsize as an unsigned int,
* with the corresponding cast to a signed int to insure that the
* proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
* and the register representation of a signed int (msr in 64-bit mode) is performed.
*/
asmlinkage long compat_sys_setgroups(u32 gidsetsize, gid_t __user *grouplist)
{
return sys_setgroups((int)gidsetsize, grouplist);
}
asmlinkage long compat_sys_sethostname(char __user *name, u32 len)
{
/* sign extend len */
return sys_sethostname(name, (int)len);
}
/* Note: it is necessary to treat pid and pgid as unsigned ints,
* with the corresponding cast to a signed int to insure that the
* proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
* and the register representation of a signed int (msr in 64-bit mode) is performed.
*/
asmlinkage long compat_sys_setpgid(u32 pid, u32 pgid)
{
return sys_setpgid((int)pid, (int)pgid);
}
long compat_sys_getpriority(u32 which, u32 who)
{
/* sign extend which and who */
return sys_getpriority((int)which, (int)who);
}
long compat_sys_setpriority(u32 which, u32 who, u32 niceval)
{
/* sign extend which, who and niceval */
return sys_setpriority((int)which, (int)who, (int)niceval);
}
long compat_sys_ioprio_get(u32 which, u32 who)
{
/* sign extend which and who */
return sys_ioprio_get((int)which, (int)who);
}
long compat_sys_ioprio_set(u32 which, u32 who, u32 ioprio)
{
/* sign extend which, who and ioprio */
return sys_ioprio_set((int)which, (int)who, (int)ioprio);
}
/* Note: it is necessary to treat newmask as an unsigned int,
* with the corresponding cast to a signed int to insure that the
* proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
* and the register representation of a signed int (msr in 64-bit mode) is performed.
*/
asmlinkage long compat_sys_ssetmask(u32 newmask)
{
return sys_ssetmask((int) newmask);
}
asmlinkage long compat_sys_syslog(u32 type, char __user * buf, u32 len)
{
/* sign extend len */
return sys_syslog(type, buf, (int)len);
}
/* Note: it is necessary to treat mask as an unsigned int,
* with the corresponding cast to a signed int to insure that the
* proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
* and the register representation of a signed int (msr in 64-bit mode) is performed.
*/
asmlinkage long compat_sys_umask(u32 mask)
{
return sys_umask((int)mask);
}
#ifdef CONFIG_SYSCTL
struct __sysctl_args32 {
u32 name;
int nlen;
u32 oldval;
u32 oldlenp;
u32 newval;
u32 newlen;
u32 __unused[4];
};
asmlinkage long compat_sys_sysctl(struct __sysctl_args32 __user *args)
{
struct __sysctl_args32 tmp;
int error;
size_t oldlen;
size_t __user *oldlenp = NULL;
unsigned long addr = (((unsigned long)&args->__unused[0]) + 7) & ~7;
if (copy_from_user(&tmp, args, sizeof(tmp)))
return -EFAULT;
if (tmp.oldval && tmp.oldlenp) {
/* Duh, this is ugly and might not work if sysctl_args
is in read-only memory, but do_sysctl does indirectly
a lot of uaccess in both directions and we'd have to
basically copy the whole sysctl.c here, and
glibc's __sysctl uses rw memory for the structure
anyway. */
oldlenp = (size_t __user *)addr;
if (get_user(oldlen, (compat_size_t __user *)compat_ptr(tmp.oldlenp)) ||
put_user(oldlen, oldlenp))
return -EFAULT;
}
lock_kernel();
error = do_sysctl(compat_ptr(tmp.name), tmp.nlen,
compat_ptr(tmp.oldval), oldlenp,
compat_ptr(tmp.newval), tmp.newlen);
unlock_kernel();
if (oldlenp) {
if (!error) {
if (get_user(oldlen, oldlenp) ||
put_user(oldlen, (compat_size_t __user *)compat_ptr(tmp.oldlenp)))
error = -EFAULT;
}
copy_to_user(args->__unused, tmp.__unused, sizeof(tmp.__unused));
}
return error;
}
#endif
unsigned long compat_sys_mmap2(unsigned long addr, size_t len,
unsigned long prot, unsigned long flags,
unsigned long fd, unsigned long pgoff)
{
/* This should remain 12 even if PAGE_SIZE changes */
return sys_mmap(addr, len, prot, flags, fd, pgoff << 12);
}
long compat_sys_tgkill(u32 tgid, u32 pid, int sig)
{
/* sign extend tgid, pid */
return sys_tgkill((int)tgid, (int)pid, sig);
}
/*
* long long munging:
* The 32 bit ABI passes long longs in an odd even register pair.
*/
compat_ssize_t compat_sys_pread64(unsigned int fd, char __user *ubuf, compat_size_t count,
u32 reg6, u32 poshi, u32 poslo)
{
return sys_pread64(fd, ubuf, count, ((loff_t)poshi << 32) | poslo);
}
compat_ssize_t compat_sys_pwrite64(unsigned int fd, char __user *ubuf, compat_size_t count,
u32 reg6, u32 poshi, u32 poslo)
{
return sys_pwrite64(fd, ubuf, count, ((loff_t)poshi << 32) | poslo);
}
compat_ssize_t compat_sys_readahead(int fd, u32 r4, u32 offhi, u32 offlo, u32 count)
{
return sys_readahead(fd, ((loff_t)offhi << 32) | offlo, count);
}
asmlinkage int compat_sys_truncate64(const char __user * path, u32 reg4,
unsigned long high, unsigned long low)
{
return sys_truncate(path, (high << 32) | low);
}
asmlinkage int compat_sys_ftruncate64(unsigned int fd, u32 reg4, unsigned long high,
unsigned long low)
{
return sys_ftruncate(fd, (high << 32) | low);
}
long ppc32_lookup_dcookie(u32 cookie_high, u32 cookie_low, char __user *buf,
size_t len)
{
return sys_lookup_dcookie((u64)cookie_high << 32 | cookie_low,
buf, len);
}
long ppc32_fadvise64(int fd, u32 unused, u32 offset_high, u32 offset_low,
size_t len, int advice)
{
return sys_fadvise64(fd, (u64)offset_high << 32 | offset_low, len,
advice);
}
asmlinkage long compat_sys_add_key(const char __user *_type,
const char __user *_description,
const void __user *_payload,
u32 plen,
u32 ringid)
{
return sys_add_key(_type, _description, _payload, plen, ringid);
}
asmlinkage long compat_sys_request_key(const char __user *_type,
const char __user *_description,
const char __user *_callout_info,
u32 destringid)
{
return sys_request_key(_type, _description, _callout_info, destringid);
}
