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android_kernel_xiaomi_sm8350/arch/mips/kernel/linux32.c
Ralf Baechle 54f2da755b Implement 32-bit compatibility for waitid(2). 
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2005-10-29 19:30:35 +01:00

1421 lines
37 KiB
C
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/*
* Conversion between 32-bit and 64-bit native system calls.
*
* Copyright (C) 2000 Silicon Graphics, Inc.
* Written by Ulf Carlsson (ulfc@engr.sgi.com)
* sys32_execve from ia64/ia32 code, Feb 2000, Kanoj Sarcar (kanoj@sgi.com)
*/
#include <linux/config.h>
#include <linux/compiler.h>
#include <linux/mm.h>
#include <linux/errno.h>
#include <linux/file.h>
#include <linux/smp_lock.h>
#include <linux/highuid.h>
#include <linux/dirent.h>
#include <linux/resource.h>
#include <linux/highmem.h>
#include <linux/time.h>
#include <linux/times.h>
#include <linux/poll.h>
#include <linux/slab.h>
#include <linux/skbuff.h>
#include <linux/filter.h>
#include <linux/shm.h>
#include <linux/sem.h>
#include <linux/msg.h>
#include <linux/icmpv6.h>
#include <linux/syscalls.h>
#include <linux/sysctl.h>
#include <linux/utime.h>
#include <linux/utsname.h>
#include <linux/personality.h>
#include <linux/timex.h>
#include <linux/dnotify.h>
#include <linux/module.h>
#include <linux/binfmts.h>
#include <linux/security.h>
#include <linux/compat.h>
#include <linux/vfs.h>
#include <net/sock.h>
#include <net/scm.h>
#include <asm/ipc.h>
#include <asm/sim.h>
#include <asm/uaccess.h>
#include <asm/mmu_context.h>
#include <asm/mman.h>
/* Use this to get at 32-bit user passed pointers. */
/* A() macro should be used for places where you e.g.
have some internal variable u32 and just want to get
rid of a compiler warning. AA() has to be used in
places where you want to convert a function argument
to 32bit pointer or when you e.g. access pt_regs
structure and want to consider 32bit registers only.
*/
#define A(__x) ((unsigned long)(__x))
#define AA(__x) ((unsigned long)((int)__x))
#ifdef __MIPSEB__
#define merge_64(r1,r2) ((((r1) & 0xffffffffUL) << 32) + ((r2) & 0xffffffffUL))
#endif
#ifdef __MIPSEL__
#define merge_64(r1,r2) ((((r2) & 0xffffffffUL) << 32) + ((r1) & 0xffffffffUL))
#endif
/*
* Revalidate the inode. This is required for proper NFS attribute caching.
*/
int cp_compat_stat(struct kstat *stat, struct compat_stat *statbuf)
{
struct compat_stat tmp;
if (!new_valid_dev(stat->dev) || !new_valid_dev(stat->rdev))
return -EOVERFLOW;
memset(&tmp, 0, sizeof(tmp));
tmp.st_dev = new_encode_dev(stat->dev);
tmp.st_ino = stat->ino;
tmp.st_mode = stat->mode;
tmp.st_nlink = stat->nlink;
SET_UID(tmp.st_uid, stat->uid);
SET_GID(tmp.st_gid, stat->gid);
tmp.st_rdev = new_encode_dev(stat->rdev);
tmp.st_size = stat->size;
tmp.st_atime = stat->atime.tv_sec;
tmp.st_mtime = stat->mtime.tv_sec;
tmp.st_ctime = stat->ctime.tv_sec;
#ifdef STAT_HAVE_NSEC
tmp.st_atime_nsec = stat->atime.tv_nsec;
tmp.st_mtime_nsec = stat->mtime.tv_nsec;
tmp.st_ctime_nsec = stat->ctime.tv_nsec;
#endif
tmp.st_blocks = stat->blocks;
tmp.st_blksize = stat->blksize;
return copy_to_user(statbuf,&tmp,sizeof(tmp)) ? -EFAULT : 0;
}
asmlinkage unsigned long
sys32_mmap2(unsigned long addr, unsigned long len, unsigned long prot,
unsigned long flags, unsigned long fd, unsigned long pgoff)
{
struct file * file = NULL;
unsigned long error;
error = -EINVAL;
if (!(flags & MAP_ANONYMOUS)) {
error = -EBADF;
file = fget(fd);
if (!file)
goto out;
}
flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
down_write(&current->mm->mmap_sem);
error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff);
up_write(&current->mm->mmap_sem);
if (file)
fput(file);
out:
return error;
}
asmlinkage int sys_truncate64(const char *path, unsigned int high,
unsigned int low)
{
if ((int)high < 0)
return -EINVAL;
return sys_truncate(path, ((long) high << 32) | low);
}
asmlinkage int sys_ftruncate64(unsigned int fd, unsigned int high,
unsigned int low)
{
if ((int)high < 0)
return -EINVAL;
return sys_ftruncate(fd, ((long) high << 32) | low);
}
/*
* sys_execve() executes a new program.
*/
asmlinkage int sys32_execve(nabi_no_regargs struct pt_regs regs)
{
int error;
char * filename;
filename = getname(compat_ptr(regs.regs[4]));
error = PTR_ERR(filename);
if (IS_ERR(filename))
goto out;
error = compat_do_execve(filename, compat_ptr(regs.regs[5]),
compat_ptr(regs.regs[6]), &regs);
putname(filename);
out:
return error;
}
struct dirent32 {
unsigned int d_ino;
unsigned int d_off;
unsigned short d_reclen;
char d_name[NAME_MAX + 1];
};
static void
xlate_dirent(void *dirent64, void *dirent32, long n)
{
long off;
struct dirent *dirp;
struct dirent32 *dirp32;
off = 0;
while (off < n) {
dirp = (struct dirent *)(dirent64 + off);
dirp32 = (struct dirent32 *)(dirent32 + off);
off += dirp->d_reclen;
dirp32->d_ino = dirp->d_ino;
dirp32->d_off = (unsigned int)dirp->d_off;
dirp32->d_reclen = dirp->d_reclen;
strncpy(dirp32->d_name, dirp->d_name, dirp->d_reclen - ((3 * 4) + 2));
}
return;
}
asmlinkage long
sys32_getdents(unsigned int fd, void * dirent32, unsigned int count)
{
long n;
void *dirent64;
dirent64 = (void *)((unsigned long)(dirent32 + (sizeof(long) - 1)) & ~(sizeof(long) - 1));
if ((n = sys_getdents(fd, dirent64, count - (dirent64 - dirent32))) < 0)
return(n);
xlate_dirent(dirent64, dirent32, n);
return(n);
}
asmlinkage int old_readdir(unsigned int fd, void * dirent, unsigned int count);
asmlinkage int
sys32_readdir(unsigned int fd, void * dirent32, unsigned int count)
{
int n;
struct dirent dirent64;
if ((n = old_readdir(fd, &dirent64, count)) < 0)
return(n);
xlate_dirent(&dirent64, dirent32, dirent64.d_reclen);
return(n);
}
asmlinkage int
sys32_waitpid(compat_pid_t pid, unsigned int *stat_addr, int options)
{
return compat_sys_wait4(pid, stat_addr, options, NULL);
}
asmlinkage long
sysn32_waitid(int which, compat_pid_t pid,
siginfo_t __user *uinfo, int options,
struct compat_rusage __user *uru)
{
struct rusage ru;
long ret;
mm_segment_t old_fs = get_fs();
set_fs (KERNEL_DS);
ret = sys_waitid(which, pid, uinfo, options,
uru ? (struct rusage __user *) &ru : NULL);
set_fs (old_fs);
if (ret < 0 || uinfo->si_signo == 0)
return ret;
if (uru)
ret = put_compat_rusage(&ru, uru);
return ret;
}
struct sysinfo32 {
s32 uptime;
u32 loads[3];
u32 totalram;
u32 freeram;
u32 sharedram;
u32 bufferram;
u32 totalswap;
u32 freeswap;
u16 procs;
u32 totalhigh;
u32 freehigh;
u32 mem_unit;
char _f[8];
};
asmlinkage int sys32_sysinfo(struct sysinfo32 *info)
{
struct sysinfo s;
int ret, err;
mm_segment_t old_fs = get_fs ();
set_fs (KERNEL_DS);
ret = sys_sysinfo(&s);
set_fs (old_fs);
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;
}
#define RLIM_INFINITY32 0x7fffffff
#define RESOURCE32(x) ((x > RLIM_INFINITY32) ? RLIM_INFINITY32 : x)
struct rlimit32 {
int rlim_cur;
int rlim_max;
};
#ifdef __MIPSEB__
asmlinkage long sys32_truncate64(const char * path, unsigned long __dummy,
int length_hi, int length_lo)
#endif
#ifdef __MIPSEL__
asmlinkage long sys32_truncate64(const char * path, unsigned long __dummy,
int length_lo, int length_hi)
#endif
{
loff_t length;
length = ((unsigned long) length_hi << 32) | (unsigned int) length_lo;
return sys_truncate(path, length);
}
#ifdef __MIPSEB__
asmlinkage long sys32_ftruncate64(unsigned int fd, unsigned long __dummy,
int length_hi, int length_lo)
#endif
#ifdef __MIPSEL__
asmlinkage long sys32_ftruncate64(unsigned int fd, unsigned long __dummy,
int length_lo, int length_hi)
#endif
{
loff_t length;
length = ((unsigned long) length_hi << 32) | (unsigned int) length_lo;
return sys_ftruncate(fd, length);
}
static inline long
get_tv32(struct timeval *o, struct compat_timeval *i)
{
return (!access_ok(VERIFY_READ, i, sizeof(*i)) ||
(__get_user(o->tv_sec, &i->tv_sec) |
__get_user(o->tv_usec, &i->tv_usec)));
}
static inline long
put_tv32(struct compat_timeval *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)));
}
extern struct timezone sys_tz;
asmlinkage int
sys32_gettimeofday(struct compat_timeval *tv, struct timezone *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;
}
static inline long get_ts32(struct timespec *o, struct compat_timeval *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;
}
asmlinkage int
sys32_settimeofday(struct compat_timeval *tv, struct timezone *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);
}
asmlinkage int sys32_llseek(unsigned int fd, unsigned int offset_high,
unsigned int offset_low, loff_t * result,
unsigned int origin)
{
return sys_llseek(fd, offset_high, offset_low, result, origin);
}
/* From the Single Unix Spec: pread & pwrite act like lseek to pos + op +
lseek back to original location. They fail just like lseek does on
non-seekable files. */
asmlinkage ssize_t sys32_pread(unsigned int fd, char * buf,
size_t count, u32 unused, u64 a4, u64 a5)
{
ssize_t ret;
struct file * file;
ssize_t (*read)(struct file *, char *, size_t, loff_t *);
loff_t pos;
ret = -EBADF;
file = fget(fd);
if (!file)
goto bad_file;
if (!(file->f_mode & FMODE_READ))
goto out;
pos = merge_64(a4, a5);
ret = rw_verify_area(READ, file, &pos, count);
if (ret)
goto out;
ret = -EINVAL;
if (!file->f_op || !(read = file->f_op->read))
goto out;
if (pos < 0)
goto out;
ret = -ESPIPE;
if (!(file->f_mode & FMODE_PREAD))
goto out;
ret = read(file, buf, count, &pos);
if (ret > 0)
dnotify_parent(file->f_dentry, DN_ACCESS);
out:
fput(file);
bad_file:
return ret;
}
asmlinkage ssize_t sys32_pwrite(unsigned int fd, const char * buf,
size_t count, u32 unused, u64 a4, u64 a5)
{
ssize_t ret;
struct file * file;
ssize_t (*write)(struct file *, const char *, size_t, loff_t *);
loff_t pos;
ret = -EBADF;
file = fget(fd);
if (!file)
goto bad_file;
if (!(file->f_mode & FMODE_WRITE))
goto out;
pos = merge_64(a4, a5);
ret = rw_verify_area(WRITE, file, &pos, count);
if (ret)
goto out;
ret = -EINVAL;
if (!file->f_op || !(write = file->f_op->write))
goto out;
if (pos < 0)
goto out;
ret = -ESPIPE;
if (!(file->f_mode & FMODE_PWRITE))
goto out;
ret = write(file, buf, count, &pos);
if (ret > 0)
dnotify_parent(file->f_dentry, DN_MODIFY);
out:
fput(file);
bad_file:
return ret;
}
asmlinkage int sys32_sched_rr_get_interval(compat_pid_t pid,
struct compat_timespec *interval)
{
struct timespec t;
int ret;
mm_segment_t old_fs = get_fs ();
set_fs (KERNEL_DS);
ret = sys_sched_rr_get_interval(pid, &t);
set_fs (old_fs);
if (put_user (t.tv_sec, &interval->tv_sec) ||
__put_user (t.tv_nsec, &interval->tv_nsec))
return -EFAULT;
return ret;
}
struct msgbuf32 { s32 mtype; char mtext[1]; };
struct ipc_perm32
{
key_t key;
__compat_uid_t uid;
__compat_gid_t gid;
__compat_uid_t cuid;
__compat_gid_t cgid;
compat_mode_t mode;
unsigned short seq;
};
struct ipc64_perm32 {
key_t key;
__compat_uid_t uid;
__compat_gid_t gid;
__compat_uid_t cuid;
__compat_gid_t cgid;
compat_mode_t mode;
unsigned short seq;
unsigned short __pad1;
unsigned int __unused1;
unsigned int __unused2;
};
struct semid_ds32 {
struct ipc_perm32 sem_perm; /* permissions .. see ipc.h */
compat_time_t sem_otime; /* last semop time */
compat_time_t sem_ctime; /* last change time */
u32 sem_base; /* ptr to first semaphore in array */
u32 sem_pending; /* pending operations to be processed */
u32 sem_pending_last; /* last pending operation */
u32 undo; /* undo requests on this array */
unsigned short sem_nsems; /* no. of semaphores in array */
};
struct semid64_ds32 {
struct ipc64_perm32 sem_perm;
compat_time_t sem_otime;
compat_time_t sem_ctime;
unsigned int sem_nsems;
unsigned int __unused1;
unsigned int __unused2;
};
struct msqid_ds32
{
struct ipc_perm32 msg_perm;
u32 msg_first;
u32 msg_last;
compat_time_t msg_stime;
compat_time_t msg_rtime;
compat_time_t msg_ctime;
u32 wwait;
u32 rwait;
unsigned short msg_cbytes;
unsigned short msg_qnum;
unsigned short msg_qbytes;
compat_ipc_pid_t msg_lspid;
compat_ipc_pid_t msg_lrpid;
};
struct msqid64_ds32 {
struct ipc64_perm32 msg_perm;
compat_time_t msg_stime;
unsigned int __unused1;
compat_time_t msg_rtime;
unsigned int __unused2;
compat_time_t msg_ctime;
unsigned int __unused3;
unsigned int msg_cbytes;
unsigned int msg_qnum;
unsigned int msg_qbytes;
compat_pid_t msg_lspid;
compat_pid_t msg_lrpid;
unsigned int __unused4;
unsigned int __unused5;
};
struct shmid_ds32 {
struct ipc_perm32 shm_perm;
int shm_segsz;
compat_time_t shm_atime;
compat_time_t shm_dtime;
compat_time_t shm_ctime;
compat_ipc_pid_t shm_cpid;
compat_ipc_pid_t shm_lpid;
unsigned short shm_nattch;
};
struct shmid64_ds32 {
struct ipc64_perm32 shm_perm;
compat_size_t shm_segsz;
compat_time_t shm_atime;
compat_time_t shm_dtime;
compat_time_t shm_ctime;
compat_pid_t shm_cpid;
compat_pid_t shm_lpid;
unsigned int shm_nattch;
unsigned int __unused1;
unsigned int __unused2;
};
struct ipc_kludge32 {
u32 msgp;
s32 msgtyp;
};
static int
do_sys32_semctl(int first, int second, int third, void *uptr)
{
union semun fourth;
u32 pad;
int err, err2;
struct semid64_ds s;
mm_segment_t old_fs;
if (!uptr)
return -EINVAL;
err = -EFAULT;
if (get_user (pad, (u32 *)uptr))
return err;
if ((third & ~IPC_64) == SETVAL)
fourth.val = (int)pad;
else
fourth.__pad = (void *)A(pad);
switch (third & ~IPC_64) {
case IPC_INFO:
case IPC_RMID:
case IPC_SET:
case SEM_INFO:
case GETVAL:
case GETPID:
case GETNCNT:
case GETZCNT:
case GETALL:
case SETVAL:
case SETALL:
err = sys_semctl (first, second, third, fourth);
break;
case IPC_STAT:
case SEM_STAT:
fourth.__pad = &s;
old_fs = get_fs();
set_fs(KERNEL_DS);
err = sys_semctl(first, second, third | IPC_64, fourth);
set_fs(old_fs);
if (third & IPC_64) {
struct semid64_ds32 *usp64 = (struct semid64_ds32 *) A(pad);
if (!access_ok(VERIFY_WRITE, usp64, sizeof(*usp64))) {
err = -EFAULT;
break;
}
err2 = __put_user(s.sem_perm.key, &usp64->sem_perm.key);
err2 |= __put_user(s.sem_perm.uid, &usp64->sem_perm.uid);
err2 |= __put_user(s.sem_perm.gid, &usp64->sem_perm.gid);
err2 |= __put_user(s.sem_perm.cuid, &usp64->sem_perm.cuid);
err2 |= __put_user(s.sem_perm.cgid, &usp64->sem_perm.cgid);
err2 |= __put_user(s.sem_perm.mode, &usp64->sem_perm.mode);
err2 |= __put_user(s.sem_perm.seq, &usp64->sem_perm.seq);
err2 |= __put_user(s.sem_otime, &usp64->sem_otime);
err2 |= __put_user(s.sem_ctime, &usp64->sem_ctime);
err2 |= __put_user(s.sem_nsems, &usp64->sem_nsems);
} else {
struct semid_ds32 *usp32 = (struct semid_ds32 *) A(pad);
if (!access_ok(VERIFY_WRITE, usp32, sizeof(*usp32))) {
err = -EFAULT;
break;
}
err2 = __put_user(s.sem_perm.key, &usp32->sem_perm.key);
err2 |= __put_user(s.sem_perm.uid, &usp32->sem_perm.uid);
err2 |= __put_user(s.sem_perm.gid, &usp32->sem_perm.gid);
err2 |= __put_user(s.sem_perm.cuid, &usp32->sem_perm.cuid);
err2 |= __put_user(s.sem_perm.cgid, &usp32->sem_perm.cgid);
err2 |= __put_user(s.sem_perm.mode, &usp32->sem_perm.mode);
err2 |= __put_user(s.sem_perm.seq, &usp32->sem_perm.seq);
err2 |= __put_user(s.sem_otime, &usp32->sem_otime);
err2 |= __put_user(s.sem_ctime, &usp32->sem_ctime);
err2 |= __put_user(s.sem_nsems, &usp32->sem_nsems);
}
if (err2)
err = -EFAULT;
break;
default:
err = - EINVAL;
break;
}
return err;
}
static int
do_sys32_msgsnd (int first, int second, int third, void *uptr)
{
struct msgbuf32 *up = (struct msgbuf32 *)uptr;
struct msgbuf *p;
mm_segment_t old_fs;
int err;
if (second < 0)
return -EINVAL;
p = kmalloc (second + sizeof (struct msgbuf)
+ 4, GFP_USER);
if (!p)
return -ENOMEM;
err = get_user (p->mtype, &up->mtype);
if (err)
goto out;
err |= __copy_from_user (p->mtext, &up->mtext, second);
if (err)
goto out;
old_fs = get_fs ();
set_fs (KERNEL_DS);
err = sys_msgsnd (first, p, second, third);
set_fs (old_fs);
out:
kfree (p);
return err;
}
static int
do_sys32_msgrcv (int first, int second, int msgtyp, int third,
int version, void *uptr)
{
struct msgbuf32 *up;
struct msgbuf *p;
mm_segment_t old_fs;
int err;
if (!version) {
struct ipc_kludge32 *uipck = (struct ipc_kludge32 *)uptr;
struct ipc_kludge32 ipck;
err = -EINVAL;
if (!uptr)
goto out;
err = -EFAULT;
if (copy_from_user (&ipck, uipck, sizeof (struct ipc_kludge32)))
goto out;
uptr = (void *)AA(ipck.msgp);
msgtyp = ipck.msgtyp;
}
if (second < 0)
return -EINVAL;
err = -ENOMEM;
p = kmalloc (second + sizeof (struct msgbuf) + 4, GFP_USER);
if (!p)
goto out;
old_fs = get_fs ();
set_fs (KERNEL_DS);
err = sys_msgrcv (first, p, second + 4, msgtyp, third);
set_fs (old_fs);
if (err < 0)
goto free_then_out;
up = (struct msgbuf32 *)uptr;
if (put_user (p->mtype, &up->mtype) ||
__copy_to_user (&up->mtext, p->mtext, err))
err = -EFAULT;
free_then_out:
kfree (p);
out:
return err;
}
static int
do_sys32_msgctl (int first, int second, void *uptr)
{
int err = -EINVAL, err2;
struct msqid64_ds m;
struct msqid_ds32 *up32 = (struct msqid_ds32 *)uptr;
struct msqid64_ds32 *up64 = (struct msqid64_ds32 *)uptr;
mm_segment_t old_fs;
switch (second & ~IPC_64) {
case IPC_INFO:
case IPC_RMID:
case MSG_INFO:
err = sys_msgctl (first, second, (struct msqid_ds *)uptr);
break;
case IPC_SET:
if (second & IPC_64) {
if (!access_ok(VERIFY_READ, up64, sizeof(*up64))) {
err = -EFAULT;
break;
}
err = __get_user(m.msg_perm.uid, &up64->msg_perm.uid);
err |= __get_user(m.msg_perm.gid, &up64->msg_perm.gid);
err |= __get_user(m.msg_perm.mode, &up64->msg_perm.mode);
err |= __get_user(m.msg_qbytes, &up64->msg_qbytes);
} else {
if (!access_ok(VERIFY_READ, up32, sizeof(*up32))) {
err = -EFAULT;
break;
}
err = __get_user(m.msg_perm.uid, &up32->msg_perm.uid);
err |= __get_user(m.msg_perm.gid, &up32->msg_perm.gid);
err |= __get_user(m.msg_perm.mode, &up32->msg_perm.mode);
err |= __get_user(m.msg_qbytes, &up32->msg_qbytes);
}
if (err)
break;
old_fs = get_fs();
set_fs(KERNEL_DS);
err = sys_msgctl(first, second | IPC_64, (struct msqid_ds *)&m);
set_fs(old_fs);
break;
case IPC_STAT:
case MSG_STAT:
old_fs = get_fs();
set_fs(KERNEL_DS);
err = sys_msgctl(first, second | IPC_64, (struct msqid_ds *)&m);
set_fs(old_fs);
if (second & IPC_64) {
if (!access_ok(VERIFY_WRITE, up64, sizeof(*up64))) {
err = -EFAULT;
break;
}
err2 = __put_user(m.msg_perm.key, &up64->msg_perm.key);
err2 |= __put_user(m.msg_perm.uid, &up64->msg_perm.uid);
err2 |= __put_user(m.msg_perm.gid, &up64->msg_perm.gid);
err2 |= __put_user(m.msg_perm.cuid, &up64->msg_perm.cuid);
err2 |= __put_user(m.msg_perm.cgid, &up64->msg_perm.cgid);
err2 |= __put_user(m.msg_perm.mode, &up64->msg_perm.mode);
err2 |= __put_user(m.msg_perm.seq, &up64->msg_perm.seq);
err2 |= __put_user(m.msg_stime, &up64->msg_stime);
err2 |= __put_user(m.msg_rtime, &up64->msg_rtime);
err2 |= __put_user(m.msg_ctime, &up64->msg_ctime);
err2 |= __put_user(m.msg_cbytes, &up64->msg_cbytes);
err2 |= __put_user(m.msg_qnum, &up64->msg_qnum);
err2 |= __put_user(m.msg_qbytes, &up64->msg_qbytes);
err2 |= __put_user(m.msg_lspid, &up64->msg_lspid);
err2 |= __put_user(m.msg_lrpid, &up64->msg_lrpid);
if (err2)
err = -EFAULT;
} else {
if (!access_ok(VERIFY_WRITE, up32, sizeof(*up32))) {
err = -EFAULT;
break;
}
err2 = __put_user(m.msg_perm.key, &up32->msg_perm.key);
err2 |= __put_user(m.msg_perm.uid, &up32->msg_perm.uid);
err2 |= __put_user(m.msg_perm.gid, &up32->msg_perm.gid);
err2 |= __put_user(m.msg_perm.cuid, &up32->msg_perm.cuid);
err2 |= __put_user(m.msg_perm.cgid, &up32->msg_perm.cgid);
err2 |= __put_user(m.msg_perm.mode, &up32->msg_perm.mode);
err2 |= __put_user(m.msg_perm.seq, &up32->msg_perm.seq);
err2 |= __put_user(m.msg_stime, &up32->msg_stime);
err2 |= __put_user(m.msg_rtime, &up32->msg_rtime);
err2 |= __put_user(m.msg_ctime, &up32->msg_ctime);
err2 |= __put_user(m.msg_cbytes, &up32->msg_cbytes);
err2 |= __put_user(m.msg_qnum, &up32->msg_qnum);
err2 |= __put_user(m.msg_qbytes, &up32->msg_qbytes);
err2 |= __put_user(m.msg_lspid, &up32->msg_lspid);
err2 |= __put_user(m.msg_lrpid, &up32->msg_lrpid);
if (err2)
err = -EFAULT;
}
break;
}
return err;
}
static int
do_sys32_shmat (int first, int second, int third, int version, void *uptr)
{
unsigned long raddr;
u32 *uaddr = (u32 *)A((u32)third);
int err = -EINVAL;
if (version == 1)
return err;
err = do_shmat (first, uptr, second, &raddr);
if (err)
return err;
err = put_user (raddr, uaddr);
return err;
}
struct shm_info32 {
int used_ids;
u32 shm_tot, shm_rss, shm_swp;
u32 swap_attempts, swap_successes;
};
static int
do_sys32_shmctl (int first, int second, void *uptr)
{
struct shmid64_ds32 *up64 = (struct shmid64_ds32 *)uptr;
struct shmid_ds32 *up32 = (struct shmid_ds32 *)uptr;
struct shm_info32 *uip = (struct shm_info32 *)uptr;
int err = -EFAULT, err2;
struct shmid64_ds s64;
mm_segment_t old_fs;
struct shm_info si;
struct shmid_ds s;
switch (second & ~IPC_64) {
case IPC_INFO:
second = IPC_INFO; /* So that we don't have to translate it */
case IPC_RMID:
case SHM_LOCK:
case SHM_UNLOCK:
err = sys_shmctl(first, second, (struct shmid_ds *)uptr);
break;
case IPC_SET:
if (second & IPC_64) {
err = get_user(s.shm_perm.uid, &up64->shm_perm.uid);
err |= get_user(s.shm_perm.gid, &up64->shm_perm.gid);
err |= get_user(s.shm_perm.mode, &up64->shm_perm.mode);
} else {
err = get_user(s.shm_perm.uid, &up32->shm_perm.uid);
err |= get_user(s.shm_perm.gid, &up32->shm_perm.gid);
err |= get_user(s.shm_perm.mode, &up32->shm_perm.mode);
}
if (err)
break;
old_fs = get_fs();
set_fs(KERNEL_DS);
err = sys_shmctl(first, second & ~IPC_64, &s);
set_fs(old_fs);
break;
case IPC_STAT:
case SHM_STAT:
old_fs = get_fs();
set_fs(KERNEL_DS);
err = sys_shmctl(first, second | IPC_64, (void *) &s64);
set_fs(old_fs);
if (err < 0)
break;
if (second & IPC_64) {
if (!access_ok(VERIFY_WRITE, up64, sizeof(*up64))) {
err = -EFAULT;
break;
}
err2 = __put_user(s64.shm_perm.key, &up64->shm_perm.key);
err2 |= __put_user(s64.shm_perm.uid, &up64->shm_perm.uid);
err2 |= __put_user(s64.shm_perm.gid, &up64->shm_perm.gid);
err2 |= __put_user(s64.shm_perm.cuid, &up64->shm_perm.cuid);
err2 |= __put_user(s64.shm_perm.cgid, &up64->shm_perm.cgid);
err2 |= __put_user(s64.shm_perm.mode, &up64->shm_perm.mode);
err2 |= __put_user(s64.shm_perm.seq, &up64->shm_perm.seq);
err2 |= __put_user(s64.shm_atime, &up64->shm_atime);
err2 |= __put_user(s64.shm_dtime, &up64->shm_dtime);
err2 |= __put_user(s64.shm_ctime, &up64->shm_ctime);
err2 |= __put_user(s64.shm_segsz, &up64->shm_segsz);
err2 |= __put_user(s64.shm_nattch, &up64->shm_nattch);
err2 |= __put_user(s64.shm_cpid, &up64->shm_cpid);
err2 |= __put_user(s64.shm_lpid, &up64->shm_lpid);
} else {
if (!access_ok(VERIFY_WRITE, up32, sizeof(*up32))) {
err = -EFAULT;
break;
}
err2 = __put_user(s64.shm_perm.key, &up32->shm_perm.key);
err2 |= __put_user(s64.shm_perm.uid, &up32->shm_perm.uid);
err2 |= __put_user(s64.shm_perm.gid, &up32->shm_perm.gid);
err2 |= __put_user(s64.shm_perm.cuid, &up32->shm_perm.cuid);
err2 |= __put_user(s64.shm_perm.cgid, &up32->shm_perm.cgid);
err2 |= __put_user(s64.shm_perm.mode, &up32->shm_perm.mode);
err2 |= __put_user(s64.shm_perm.seq, &up32->shm_perm.seq);
err2 |= __put_user(s64.shm_atime, &up32->shm_atime);
err2 |= __put_user(s64.shm_dtime, &up32->shm_dtime);
err2 |= __put_user(s64.shm_ctime, &up32->shm_ctime);
err2 |= __put_user(s64.shm_segsz, &up32->shm_segsz);
err2 |= __put_user(s64.shm_nattch, &up32->shm_nattch);
err2 |= __put_user(s64.shm_cpid, &up32->shm_cpid);
err2 |= __put_user(s64.shm_lpid, &up32->shm_lpid);
}
if (err2)
err = -EFAULT;
break;
case SHM_INFO:
old_fs = get_fs();
set_fs(KERNEL_DS);
err = sys_shmctl(first, second, (void *)&si);
set_fs(old_fs);
if (err < 0)
break;
err2 = put_user(si.used_ids, &uip->used_ids);
err2 |= __put_user(si.shm_tot, &uip->shm_tot);
err2 |= __put_user(si.shm_rss, &uip->shm_rss);
err2 |= __put_user(si.shm_swp, &uip->shm_swp);
err2 |= __put_user(si.swap_attempts, &uip->swap_attempts);
err2 |= __put_user (si.swap_successes, &uip->swap_successes);
if (err2)
err = -EFAULT;
break;
default:
err = -EINVAL;
break;
}
return err;
}
static int sys32_semtimedop(int semid, struct sembuf *tsems, int nsems,
const struct compat_timespec *timeout32)
{
struct compat_timespec t32;
struct timespec *t64 = compat_alloc_user_space(sizeof(*t64));
if (copy_from_user(&t32, timeout32, sizeof(t32)))
return -EFAULT;
if (put_user(t32.tv_sec, &t64->tv_sec) ||
put_user(t32.tv_nsec, &t64->tv_nsec))
return -EFAULT;
return sys_semtimedop(semid, tsems, nsems, t64);
}
asmlinkage long
sys32_ipc (u32 call, int first, int second, int third, u32 ptr, u32 fifth)
{
int version, err;
version = call >> 16; /* hack for backward compatibility */
call &= 0xffff;
switch (call) {
case SEMOP:
/* struct sembuf is the same on 32 and 64bit :)) */
err = sys_semtimedop (first, (struct sembuf *)AA(ptr), second,
NULL);
break;
case SEMTIMEDOP:
err = sys32_semtimedop (first, (struct sembuf *)AA(ptr), second,
(const struct compat_timespec __user *)AA(fifth));
break;
case SEMGET:
err = sys_semget (first, second, third);
break;
case SEMCTL:
err = do_sys32_semctl (first, second, third,
(void *)AA(ptr));
break;
case MSGSND:
err = do_sys32_msgsnd (first, second, third,
(void *)AA(ptr));
break;
case MSGRCV:
err = do_sys32_msgrcv (first, second, fifth, third,
version, (void *)AA(ptr));
break;
case MSGGET:
err = sys_msgget ((key_t) first, second);
break;
case MSGCTL:
err = do_sys32_msgctl (first, second, (void *)AA(ptr));
break;
case SHMAT:
err = do_sys32_shmat (first, second, third,
version, (void *)AA(ptr));
break;
case SHMDT:
err = sys_shmdt ((char *)A(ptr));
break;
case SHMGET:
err = sys_shmget (first, (unsigned)second, third);
break;
case SHMCTL:
err = do_sys32_shmctl (first, second, (void *)AA(ptr));
break;
default:
err = -EINVAL;
break;
}
return err;
}
asmlinkage long sys32_shmat(int shmid, char __user *shmaddr,
int shmflg, int32_t *addr)
{
unsigned long raddr;
int err;
err = do_shmat(shmid, shmaddr, shmflg, &raddr);
if (err)
return err;
return put_user(raddr, addr);
}
struct sysctl_args32
{
compat_caddr_t name;
int nlen;
compat_caddr_t oldval;
compat_caddr_t oldlenp;
compat_caddr_t newval;
compat_size_t newlen;
unsigned int __unused[4];
};
#ifdef CONFIG_SYSCTL
asmlinkage long sys32_sysctl(struct sysctl_args32 *args)
{
struct sysctl_args32 tmp;
int error;
size_t oldlen, *oldlenp = NULL;
unsigned long addr = (((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. */
if (get_user(oldlen, (u32 *)A(tmp.oldlenp)) ||
put_user(oldlen, (size_t *)addr))
return -EFAULT;
oldlenp = (size_t *)addr;
}
lock_kernel();
error = do_sysctl((int *)A(tmp.name), tmp.nlen, (void *)A(tmp.oldval),
oldlenp, (void *)A(tmp.newval), tmp.newlen);
unlock_kernel();
if (oldlenp) {
if (!error) {
if (get_user(oldlen, (size_t *)addr) ||
put_user(oldlen, (u32 *)A(tmp.oldlenp)))
error = -EFAULT;
}
copy_to_user(args->__unused, tmp.__unused, sizeof(tmp.__unused));
}
return error;
}
#endif /* CONFIG_SYSCTL */
asmlinkage long sys32_newuname(struct new_utsname * name)
{
int ret = 0;
down_read(&uts_sem);
if (copy_to_user(name,&system_utsname,sizeof *name))
ret = -EFAULT;
up_read(&uts_sem);
if (current->personality == PER_LINUX32 && !ret)
if (copy_to_user(name->machine, "mips\0\0\0", 8))
ret = -EFAULT;
return ret;
}
asmlinkage int sys32_personality(unsigned long personality)
{
int ret;
if (current->personality == PER_LINUX32 && personality == PER_LINUX)
personality = PER_LINUX32;
ret = sys_personality(personality);
if (ret == PER_LINUX32)
ret = PER_LINUX;
return ret;
}
/* ustat compatibility */
struct ustat32 {
compat_daddr_t f_tfree;
compat_ino_t f_tinode;
char f_fname[6];
char f_fpack[6];
};
extern asmlinkage long sys_ustat(dev_t dev, struct ustat * ubuf);
asmlinkage int sys32_ustat(dev_t dev, struct ustat32 * ubuf32)
{
int err;
struct ustat tmp;
struct ustat32 tmp32;
mm_segment_t old_fs = get_fs();
set_fs(KERNEL_DS);
err = sys_ustat(dev, &tmp);
set_fs (old_fs);
if (err)
goto out;
memset(&tmp32,0,sizeof(struct ustat32));
tmp32.f_tfree = tmp.f_tfree;
tmp32.f_tinode = tmp.f_tinode;
err = copy_to_user(ubuf32,&tmp32,sizeof(struct ustat32)) ? -EFAULT : 0;
out:
return err;
}
/* Handle adjtimex compatibility. */
struct timex32 {
u32 modes;
s32 offset, freq, maxerror, esterror;
s32 status, constant, precision, tolerance;
struct compat_timeval time;
s32 tick;
s32 ppsfreq, jitter, shift, stabil;
s32 jitcnt, calcnt, errcnt, stbcnt;
s32 :32; s32 :32; s32 :32; s32 :32;
s32 :32; s32 :32; s32 :32; s32 :32;
s32 :32; s32 :32; s32 :32; s32 :32;
};
extern int do_adjtimex(struct timex *);
asmlinkage int sys32_adjtimex(struct timex32 *utp)
{
struct timex txc;
int ret;
memset(&txc, 0, sizeof(struct timex));
if (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;
ret = do_adjtimex(&txc);
if (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))
ret = -EFAULT;
return ret;
}
asmlinkage int sys32_sendfile(int out_fd, int in_fd, compat_off_t *offset,
s32 count)
{
mm_segment_t old_fs = get_fs();
int ret;
off_t of;
if (offset && get_user(of, offset))
return -EFAULT;
set_fs(KERNEL_DS);
ret = sys_sendfile(out_fd, in_fd, offset ? &of : NULL, count);
set_fs(old_fs);
if (offset && put_user(of, offset))
return -EFAULT;
return ret;
}
asmlinkage ssize_t sys32_readahead(int fd, u32 pad0, u64 a2, u64 a3,
size_t count)
{
return sys_readahead(fd, merge_64(a2, a3), count);
}
/* Argument list sizes for sys_socketcall */
#define AL(x) ((x) * sizeof(unsigned int))
static unsigned char socketcall_nargs[18]={AL(0),AL(3),AL(3),AL(3),AL(2),AL(3),
AL(3),AL(3),AL(4),AL(4),AL(4),AL(6),
AL(6),AL(2),AL(5),AL(5),AL(3),AL(3)};
#undef AL
/*
* System call vectors.
*
* Argument checking cleaned up. Saved 20% in size.
* This function doesn't need to set the kernel lock because
* it is set by the callees.
*/
asmlinkage long sys32_socketcall(int call, unsigned int *args32)
{
unsigned int a[6];
unsigned int a0,a1;
int err;
extern asmlinkage long sys_socket(int family, int type, int protocol);
extern asmlinkage long sys_bind(int fd, struct sockaddr __user *umyaddr, int addrlen);
extern asmlinkage long sys_connect(int fd, struct sockaddr __user *uservaddr, int addrlen);
extern asmlinkage long sys_listen(int fd, int backlog);
extern asmlinkage long sys_accept(int fd, struct sockaddr __user *upeer_sockaddr, int __user *upeer_addrlen);
extern asmlinkage long sys_getsockname(int fd, struct sockaddr __user *usockaddr, int __user *usockaddr_len);
extern asmlinkage long sys_getpeername(int fd, struct sockaddr __user *usockaddr, int __user *usockaddr_len);
extern asmlinkage long sys_socketpair(int family, int type, int protocol, int __user *usockvec);
extern asmlinkage long sys_send(int fd, void __user * buff, size_t len, unsigned flags);
extern asmlinkage long sys_sendto(int fd, void __user * buff, size_t len, unsigned flags,
struct sockaddr __user *addr, int addr_len);
extern asmlinkage long sys_recv(int fd, void __user * ubuf, size_t size, unsigned flags);
extern asmlinkage long sys_recvfrom(int fd, void __user * ubuf, size_t size, unsigned flags,
struct sockaddr __user *addr, int __user *addr_len);
extern asmlinkage long sys_shutdown(int fd, int how);
extern asmlinkage long sys_setsockopt(int fd, int level, int optname, char __user *optval, int optlen);
extern asmlinkage long sys_getsockopt(int fd, int level, int optname, char __user *optval, int *optlen);
extern asmlinkage long sys_sendmsg(int fd, struct msghdr __user *msg, unsigned flags);
extern asmlinkage long sys_recvmsg(int fd, struct msghdr __user *msg, unsigned int flags);
if(call<1||call>SYS_RECVMSG)
return -EINVAL;
/* copy_from_user should be SMP safe. */
if (copy_from_user(a, args32, socketcall_nargs[call]))
return -EFAULT;
a0=a[0];
a1=a[1];
switch(call)
{
case SYS_SOCKET:
err = sys_socket(a0,a1,a[2]);
break;
case SYS_BIND:
err = sys_bind(a0,(struct sockaddr __user *)A(a1), a[2]);
break;
case SYS_CONNECT:
err = sys_connect(a0, (struct sockaddr __user *)A(a1), a[2]);
break;
case SYS_LISTEN:
err = sys_listen(a0,a1);
break;
case SYS_ACCEPT:
err = sys_accept(a0,(struct sockaddr __user *)A(a1), (int __user *)A(a[2]));
break;
case SYS_GETSOCKNAME:
err = sys_getsockname(a0,(struct sockaddr __user *)A(a1), (int __user *)A(a[2]));
break;
case SYS_GETPEERNAME:
err = sys_getpeername(a0, (struct sockaddr __user *)A(a1), (int __user *)A(a[2]));
break;
case SYS_SOCKETPAIR:
err = sys_socketpair(a0,a1, a[2], (int __user *)A(a[3]));
break;
case SYS_SEND:
err = sys_send(a0, (void __user *)A(a1), a[2], a[3]);
break;
case SYS_SENDTO:
err = sys_sendto(a0,(void __user *)A(a1), a[2], a[3],
(struct sockaddr __user *)A(a[4]), a[5]);
break;
case SYS_RECV:
err = sys_recv(a0, (void __user *)A(a1), a[2], a[3]);
break;
case SYS_RECVFROM:
err = sys_recvfrom(a0, (void __user *)A(a1), a[2], a[3],
(struct sockaddr __user *)A(a[4]), (int __user *)A(a[5]));
break;
case SYS_SHUTDOWN:
err = sys_shutdown(a0,a1);
break;
case SYS_SETSOCKOPT:
err = sys_setsockopt(a0, a1, a[2], (char __user *)A(a[3]), a[4]);
break;
case SYS_GETSOCKOPT:
err = sys_getsockopt(a0, a1, a[2], (char __user *)A(a[3]), (int __user *)A(a[4]));
break;
case SYS_SENDMSG:
err = sys_sendmsg(a0, (struct msghdr __user *) A(a1), a[2]);
break;
case SYS_RECVMSG:
err = sys_recvmsg(a0, (struct msghdr __user *) A(a1), a[2]);
break;
default:
err = -EINVAL;
break;
}
return err;
}
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