/*
* sys_ia32.c: Conversion between 32bit and 64bit native syscalls. Based on
* sys_sparc32
*
* Copyright (C) 2000 VA Linux Co
* Copyright (C) 2000 Don Dugger <n0ano@valinux.com>
* Copyright (C) 1999 Arun Sharma <arun.sharma@intel.com>
* Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
* Copyright (C) 1997 David S. Miller (davem@caip.rutgers.edu)
* Copyright (C) 2000 Hewlett-Packard Co.
* Copyright (C) 2000 David Mosberger-Tang <davidm@hpl.hp.com>
* Copyright (C) 2000,2001,2002 Andi Kleen, SuSE Labs (x86-64 port)
*
* These routines maintain argument size conversion between 32bit and 64bit
* environment. In 2.5 most of this should be moved to a generic directory.
*
* This file assumes that there is a hole at the end of user address space.
*
* Some of the functions are LE specific currently. These are hopefully all marked.
* This should be fixed.
*/
#include <linux/config.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/fs.h>
#include <linux/file.h>
#include <linux/signal.h>
#include <linux/resource.h>
#include <linux/times.h>
#include <linux/utsname.h>
#include <linux/timex.h>
#include <linux/smp.h>
#include <linux/smp_lock.h>
#include <linux/sem.h>
#include <linux/msg.h>
#include <linux/mm.h>
#include <linux/shm.h>
#include <linux/slab.h>
#include <linux/uio.h>
#include <linux/nfs_fs.h>
#include <linux/smb_fs.h>
#include <linux/smb_mount.h>
#include <linux/ncp_fs.h>
#include <linux/quota.h>
#include <linux/module.h>
#include <linux/sunrpc/svc.h>
#include <linux/nfsd/nfsd.h>
#include <linux/nfsd/cache.h>
#include <linux/nfsd/xdr.h>
#include <linux/nfsd/syscall.h>
#include <linux/poll.h>
#include <linux/personality.h>
#include <linux/stat.h>
#include <linux/ipc.h>
#include <linux/rwsem.h>
#include <linux/binfmts.h>
#include <linux/init.h>
#include <linux/aio_abi.h>
#include <linux/aio.h>
#include <linux/compat.h>
#include <linux/vfs.h>
#include <linux/ptrace.h>
#include <linux/highuid.h>
#include <asm/mman.h>
#include <asm/types.h>
#include <asm/uaccess.h>
#include <asm/semaphore.h>
#include <asm/ipc.h>
#include <asm/atomic.h>
#include <asm/ldt.h>
#include <net/scm.h>
#include <net/sock.h>
#include <asm/ia32.h>
#define A(__x) ((unsigned long)(__x))
#define AA(__x) ((unsigned long)(__x))
#define ROUND_UP(x,a) ((__typeof__(x))(((unsigned long)(x) + ((a) - 1)) & ~((a) - 1)))
#define NAME_OFFSET(de) ((int) ((de)->d_name - (char *) (de)))
int cp_compat_stat(struct kstat *kbuf, struct compat_stat *ubuf)
{
typeof(ubuf->st_uid) uid = 0;
typeof(ubuf->st_gid) gid = 0;
SET_UID(uid, kbuf->uid);
SET_GID(gid, kbuf->gid);
if (!old_valid_dev(kbuf->dev) || !old_valid_dev(kbuf->rdev))
return -EOVERFLOW;
if (kbuf->size >= 0x7fffffff)
return -EOVERFLOW;
if (verify_area(VERIFY_WRITE, ubuf, sizeof(struct compat_stat)) ||
__put_user (old_encode_dev(kbuf->dev), &ubuf->st_dev) ||
__put_user (kbuf->ino, &ubuf->st_ino) ||
__put_user (kbuf->mode, &ubuf->st_mode) ||
__put_user (kbuf->nlink, &ubuf->st_nlink) ||
__put_user (uid, &ubuf->st_uid) ||
__put_user (gid, &ubuf->st_gid) ||
__put_user (old_encode_dev(kbuf->rdev), &ubuf->st_rdev) ||
__put_user (kbuf->size, &ubuf->st_size) ||
__put_user (kbuf->atime.tv_sec, &ubuf->st_atime) ||
__put_user (kbuf->atime.tv_nsec, &ubuf->st_atime_nsec) ||
__put_user (kbuf->mtime.tv_sec, &ubuf->st_mtime) ||
__put_user (kbuf->mtime.tv_nsec, &ubuf->st_mtime_nsec) ||
__put_user (kbuf->ctime.tv_sec, &ubuf->st_ctime) ||
__put_user (kbuf->ctime.tv_nsec, &ubuf->st_ctime_nsec) ||
__put_user (kbuf->blksize, &ubuf->st_blksize) ||
__put_user (kbuf->blocks, &ubuf->st_blocks))
return -EFAULT;
return 0;
}
extern long sys_truncate(char *, loff_t);
extern long sys_ftruncate(int, loff_t);
asmlinkage long
sys32_truncate64(char * filename, unsigned long offset_low, unsigned long offset_high)
{
return sys_truncate(filename, ((loff_t) offset_high << 32) | offset_low);
}
asmlinkage long
sys32_ftruncate64(unsigned int fd, unsigned long offset_low, unsigned long offset_high)
{
return sys_ftruncate(fd, ((loff_t) offset_high << 32) | offset_low);
}
/* Another set for IA32/LFS -- x86_64 struct stat is different due to
support for 64bit inode numbers. */
static int
cp_stat64(struct stat64 *ubuf, struct kstat *stat)
{
typeof(ubuf->st_uid) uid = 0;
typeof(ubuf->st_gid) gid = 0;
SET_UID(uid, stat->uid);
SET_GID(gid, stat->gid);
if (verify_area(VERIFY_WRITE, ubuf, sizeof(struct stat64)) ||
__put_user(huge_encode_dev(stat->dev), &ubuf->st_dev) ||
__put_user (stat->ino, &ubuf->__st_ino) ||
__put_user (stat->ino, &ubuf->st_ino) ||
__put_user (stat->mode, &ubuf->st_mode) ||
__put_user (stat->nlink, &ubuf->st_nlink) ||
__put_user (uid, &ubuf->st_uid) ||
__put_user (gid, &ubuf->st_gid) ||
__put_user (huge_encode_dev(stat->rdev), &ubuf->st_rdev) ||
__put_user (stat->size, &ubuf->st_size) ||
__put_user (stat->atime.tv_sec, &ubuf->st_atime) ||
__put_user (stat->atime.tv_nsec, &ubuf->st_atime_nsec) ||
__put_user (stat->mtime.tv_sec, &ubuf->st_mtime) ||
__put_user (stat->mtime.tv_nsec, &ubuf->st_mtime_nsec) ||
__put_user (stat->ctime.tv_sec, &ubuf->st_ctime) ||
__put_user (stat->ctime.tv_nsec, &ubuf->st_ctime_nsec) ||
__put_user (stat->blksize, &ubuf->st_blksize) ||
__put_user (stat->blocks, &ubuf->st_blocks))
return -EFAULT;
return 0;
}
asmlinkage long
sys32_stat64(char * filename, struct stat64 *statbuf)
{
struct kstat stat;
int ret = vfs_stat(filename, &stat);
if (!ret)
ret = cp_stat64(statbuf, &stat);
return ret;
}
asmlinkage long
sys32_lstat64(char * filename, struct stat64 *statbuf)
{
struct kstat stat;
int ret = vfs_lstat(filename, &stat);
if (!ret)
ret = cp_stat64(statbuf, &stat);
return ret;
}
asmlinkage long
sys32_fstat64(unsigned int fd, struct stat64 *statbuf)
{
struct kstat stat;
int ret = vfs_fstat(fd, &stat);
if (!ret)
ret = cp_stat64(statbuf, &stat);
return ret;
}
/*
* Linux/i386 didn't use to be able to handle more than
* 4 system call parameters, so these system calls used a memory
* block for parameter passing..
*/
struct mmap_arg_struct {
unsigned int addr;
unsigned int len;
unsigned int prot;
unsigned int flags;
unsigned int fd;
unsigned int offset;
};
asmlinkage long
sys32_mmap(struct mmap_arg_struct *arg)
{
struct mmap_arg_struct a;
struct file *file = NULL;
unsigned long retval;
struct mm_struct *mm ;
if (copy_from_user(&a, arg, sizeof(a)))
return -EFAULT;
if (a.offset & ~PAGE_MASK)
return -EINVAL;
if (!(a.flags & MAP_ANONYMOUS)) {
file = fget(a.fd);
if (!file)
return -EBADF;
}
if (a.prot & PROT_READ)
a.prot |= vm_force_exec32;
mm = current->mm;
down_write(&mm->mmap_sem);
retval = do_mmap_pgoff(file, a.addr, a.len, a.prot, a.flags, a.offset>>PAGE_SHIFT);
if (file)
fput(file);
up_write(&mm->mmap_sem);
return retval;
}
extern asmlinkage long sys_mprotect(unsigned long start,size_t len,unsigned long prot);
asmlinkage long
sys32_mprotect(unsigned long start, size_t len, unsigned long prot)
{
if (prot & PROT_READ)
prot |= vm_force_exec32;
return sys_mprotect(start,len,prot);
}
asmlinkage long
sys32_pipe(int *fd)
{
int retval;
int fds[2];
retval = do_pipe(fds);
if (retval)
goto out;
if (copy_to_user(fd, fds, sizeof(fds)))
retval = -EFAULT;
out:
return retval;
}
asmlinkage long
sys32_rt_sigaction(int sig, struct sigaction32 *act,
struct sigaction32 *oact, unsigned int sigsetsize)
{
struct k_sigaction new_ka, old_ka;
int ret;
compat_sigset_t set32;
/* XXX: Don't preclude handling different sized sigset_t's. */
if (sigsetsize != sizeof(compat_sigset_t))
return -EINVAL;
if (act) {
if (verify_area(VERIFY_READ, act, sizeof(*act)) ||
__get_user((long)new_ka.sa.sa_handler, &act->sa_handler) ||
__get_user(new_ka.sa.sa_flags, &act->sa_flags) ||
__get_user((long)new_ka.sa.sa_restorer, &act->sa_restorer)||
__copy_from_user(&set32, &act->sa_mask, sizeof(compat_sigset_t)))
return -EFAULT;
/* FIXME: here we rely on _COMPAT_NSIG_WORS to be >= than _NSIG_WORDS << 1 */
switch (_NSIG_WORDS) {
case 4: new_ka.sa.sa_mask.sig[3] = set32.sig[6]
| (((long)set32.sig[7]) << 32);
case 3: new_ka.sa.sa_mask.sig[2] = set32.sig[4]
| (((long)set32.sig[5]) << 32);
case 2: new_ka.sa.sa_mask.sig[1] = set32.sig[2]
| (((long)set32.sig[3]) << 32);
case 1: new_ka.sa.sa_mask.sig[0] = set32.sig[0]
| (((long)set32.sig[1]) << 32);
}
}
ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
if (!ret && oact) {
/* FIXME: here we rely on _COMPAT_NSIG_WORS to be >= than _NSIG_WORDS << 1 */
switch (_NSIG_WORDS) {
case 4:
set32.sig[7] = (old_ka.sa.sa_mask.sig[3] >> 32);
set32.sig[6] = old_ka.sa.sa_mask.sig[3];
case 3:
set32.sig[5] = (old_ka.sa.sa_mask.sig[2] >> 32);
set32.sig[4] = old_ka.sa.sa_mask.sig[2];
case 2:
set32.sig[3] = (old_ka.sa.sa_mask.sig[1] >> 32);
set32.sig[2] = old_ka.sa.sa_mask.sig[1];
case 1:
set32.sig[1] = (old_ka.sa.sa_mask.sig[0] >> 32);
set32.sig[0] = old_ka.sa.sa_mask.sig[0];
}
if (verify_area(VERIFY_WRITE, oact, sizeof(*oact)) ||
__put_user((long)old_ka.sa.sa_handler, &oact->sa_handler) ||
__put_user((long)old_ka.sa.sa_restorer, &oact->sa_restorer) ||
__put_user(old_ka.sa.sa_flags, &oact->sa_flags) ||
__copy_to_user(&oact->sa_mask, &set32, sizeof(compat_sigset_t)))
return -EFAULT;
}
return ret;
}
asmlinkage long
sys32_sigaction (int sig, struct old_sigaction32 *act, struct old_sigaction32 *oact)
{
struct k_sigaction new_ka, old_ka;
int ret;
if (act) {
compat_old_sigset_t mask;
if (verify_area(VERIFY_READ, act, sizeof(*act)) ||
__get_user((long)new_ka.sa.sa_handler, &act->sa_handler) ||
__get_user(new_ka.sa.sa_flags, &act->sa_flags) ||
__get_user((long)new_ka.sa.sa_restorer, &act->sa_restorer) ||
__get_user(mask, &act->sa_mask))
return -EFAULT;
siginitset(&new_ka.sa.sa_mask, mask);
}
ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
if (!ret && oact) {
if (verify_area(VERIFY_WRITE, oact, sizeof(*oact)) ||
__put_user((long)old_ka.sa.sa_handler, &oact->sa_handler) ||
__put_user((long)old_ka.sa.sa_restorer, &oact->sa_restorer) ||
__put_user(old_ka.sa.sa_flags, &oact->sa_flags) ||
__put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask))
return -EFAULT;
}
return ret;
}
extern asmlinkage long sys_rt_sigprocmask(int how, sigset_t *set, sigset_t *oset,
size_t sigsetsize);
asmlinkage long
sys32_rt_sigprocmask(int how, compat_sigset_t *set, compat_sigset_t *oset,
unsigned int sigsetsize)
{
sigset_t s;
compat_sigset_t s32;
int ret;
mm_segment_t old_fs = get_fs();
if (set) {
if (copy_from_user (&s32, set, sizeof(compat_sigset_t)))
return -EFAULT;
switch (_NSIG_WORDS) {
case 4: s.sig[3] = s32.sig[6] | (((long)s32.sig[7]) << 32);
case 3: s.sig[2] = s32.sig[4] | (((long)s32.sig[5]) << 32);
case 2: s.sig[1] = s32.sig[2] | (((long)s32.sig[3]) << 32);
case 1: s.sig[0] = s32.sig[0] | (((long)s32.sig[1]) << 32);
}
}
set_fs (KERNEL_DS);
ret = sys_rt_sigprocmask(how, set ? &s : NULL, oset ? &s : NULL,
sigsetsize);
set_fs (old_fs);
if (ret) return ret;
if (oset) {
switch (_NSIG_WORDS) {
case 4: s32.sig[7] = (s.sig[3] >> 32); s32.sig[6] = s.sig[3];
case 3: s32.sig[5] = (s.sig[2] >> 32); s32.sig[4] = s.sig[2];
case 2: s32.sig[3] = (s.sig[1] >> 32); s32.sig[2] = s.sig[1];
case 1: s32.sig[1] = (s.sig[0] >> 32); s32.sig[0] = s.sig[0];
}
if (copy_to_user (oset, &s32, sizeof(compat_sigset_t)))
return -EFAULT;
}
return 0;
}
static inline long
get_tv32(struct timeval *o, struct compat_timeval *i)
{
int err = -EFAULT;
if (access_ok(VERIFY_READ, i, sizeof(*i))) {
err = __get_user(o->tv_sec, &i->tv_sec);
err |= __get_user(o->tv_usec, &i->tv_usec);
}
return err;
}
static inline long
put_tv32(struct compat_timeval *o, struct timeval *i)
{
int err = -EFAULT;
if (access_ok(VERIFY_WRITE, o, sizeof(*o))) {
err = __put_user(i->tv_sec, &o->tv_sec);
err |= __put_user(i->tv_usec, &o->tv_usec);
}
return err;
}
extern int do_setitimer(int which, struct itimerval *, struct itimerval *);
asmlinkage long
sys32_alarm(unsigned int seconds)
{
struct itimerval it_new, it_old;
unsigned int oldalarm;
it_new.it_interval.tv_sec = it_new.it_interval.tv_usec = 0;
it_new.it_value.tv_sec = seconds;
it_new.it_value.tv_usec = 0;
do_setitimer(ITIMER_REAL, &it_new, &it_old);
oldalarm = it_old.it_value.tv_sec;
/* ehhh.. We can't return 0 if we have an alarm pending.. */
/* And we'd better return too much than too little anyway */
if (it_old.it_value.tv_usec)
oldalarm++;
return oldalarm;
}
/* Translations due to time_t size differences. Which affects all
sorts of things, like timeval and itimerval. */
extern struct timezone sys_tz;
asmlinkage long
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;
}
asmlinkage long
sys32_settimeofday(struct compat_timeval *tv, struct timezone *tz)
{
struct timeval ktv;
struct timespec kts;
struct timezone ktz;
if (tv) {
if (get_tv32(&ktv, tv))
return -EFAULT;
kts.tv_sec = ktv.tv_sec;
kts.tv_nsec = ktv.tv_usec * NSEC_PER_USEC;
}
if (tz) {
if (copy_from_user(&ktz, tz, sizeof(ktz)))
return -EFAULT;
}
return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL);
}
struct linux32_dirent {
u32 d_ino;
u32 d_off;
u16 d_reclen;
char d_name[1];
};
struct old_linux32_dirent {
u32 d_ino;
u32 d_offset;
u16 d_namlen;
char d_name[1];
};
struct getdents32_callback {
struct linux32_dirent * current_dir;
struct linux32_dirent * previous;
int count;
int error;
};
struct readdir32_callback {
struct old_linux32_dirent * dirent;
int count;
};
static int
filldir32 (void *__buf, const char *name, int namlen, loff_t offset, ino_t ino,
unsigned int d_type)
{
struct linux32_dirent * dirent;
struct getdents32_callback * buf = (struct getdents32_callback *) __buf;
int reclen = ROUND_UP(NAME_OFFSET(dirent) + namlen + 1, 4);
buf->error = -EINVAL; /* only used if we fail.. */
if (reclen > buf->count)
return -EINVAL;
dirent = buf->previous;
if (dirent)
put_user(offset, &dirent->d_off);
dirent = buf->current_dir;
buf->previous = dirent;
put_user(ino, &dirent->d_ino);
put_user(reclen, &dirent->d_reclen);
copy_to_user(dirent->d_name, name, namlen);
put_user(0, dirent->d_name + namlen);
((char *) dirent) += reclen;
buf->current_dir = dirent;
buf->count -= reclen;
return 0;
}
asmlinkage long
sys32_getdents (unsigned int fd, void * dirent, unsigned int count)
{
struct file * file;
struct linux32_dirent * lastdirent;
struct getdents32_callback buf;
int error;
error = -EBADF;
file = fget(fd);
if (!file)
goto out;
buf.current_dir = (struct linux32_dirent *) dirent;
buf.previous = NULL;
buf.count = count;
buf.error = 0;
error = vfs_readdir(file, filldir32, &buf);
if (error < 0)
goto out_putf;
error = buf.error;
lastdirent = buf.previous;
if (lastdirent) {
put_user(file->f_pos, &lastdirent->d_off);
error = count - buf.count;
}
out_putf:
fput(file);
out:
return error;
}
static int
fillonedir32 (void * __buf, const char * name, int namlen, loff_t offset, ino_t ino, unsigned d_type)
{
struct readdir32_callback * buf = (struct readdir32_callback *) __buf;
struct old_linux32_dirent * 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 long
sys32_oldreaddir (unsigned int fd, void * dirent, unsigned int count)
{
int error;
struct file * file;
struct readdir32_callback buf;
error = -EBADF;
file = fget(fd);
if (!file)
goto out;
buf.count = 0;
buf.dirent = dirent;
error = vfs_readdir(file, fillonedir32, &buf);
if (error >= 0)
error = buf.count;
fput(file);
out:
return error;
}
/*
* We can actually return ERESTARTSYS instead of EINTR, but I'd
* like to be certain this leads to no problems. So I return
* EINTR just for safety.
*
* Update: ERESTARTSYS breaks at least the xview clock binary, so
* I'm trying ERESTARTNOHAND which restart only when you want to.
*/
#define MAX_SELECT_SECONDS \
((unsigned long) (MAX_SCHEDULE_TIMEOUT / HZ)-1)
#define ROUND_UP_TIME(x,y) (((x)+(y)-1)/(y))
asmlinkage long
sys32_select(int n, fd_set *inp, fd_set *outp, fd_set *exp, struct compat_timeval *tvp32)
{
fd_set_bits fds;
char *bits;
long timeout;
int ret, size;
timeout = MAX_SCHEDULE_TIMEOUT;
if (tvp32) {
time_t sec, usec;
get_user(sec, &tvp32->tv_sec);
get_user(usec, &tvp32->tv_usec);
ret = -EINVAL;
if (sec < 0 || usec < 0)
goto out_nofds;
if ((unsigned long) sec < MAX_SELECT_SECONDS) {
timeout = ROUND_UP_TIME(usec, 1000000/HZ);
timeout += sec * (unsigned long) HZ;
}
}
ret = -EINVAL;
if (n < 0)
goto out_nofds;
if (n > current->files->max_fdset)
n = current->files->max_fdset;
/*
* We need 6 bitmaps (in/out/ex for both incoming and outgoing),
* since we used fdset we need to allocate memory in units of
* long-words.
*/
ret = -ENOMEM;
size = FDS_BYTES(n);
bits = kmalloc(6 * size, GFP_KERNEL);
if (!bits)
goto out_nofds;
fds.in = (unsigned long *) bits;
fds.out = (unsigned long *) (bits + size);
fds.ex = (unsigned long *) (bits + 2*size);
fds.res_in = (unsigned long *) (bits + 3*size);
fds.res_out = (unsigned long *) (bits + 4*size);
fds.res_ex = (unsigned long *) (bits + 5*size);
if ((ret = get_fd_set(n, inp, fds.in)) ||
(ret = get_fd_set(n, outp, fds.out)) ||
(ret = get_fd_set(n, exp, fds.ex)))
goto out;
zero_fd_set(n, fds.res_in);
zero_fd_set(n, fds.res_out);
zero_fd_set(n, fds.res_ex);
ret = do_select(n, &fds, &timeout);
if (tvp32 && !(current->personality & STICKY_TIMEOUTS)) {
time_t sec = 0, usec = 0;
if (timeout) {
sec = timeout / HZ;
usec = timeout % HZ;
usec *= (1000000/HZ);
}
put_user(sec, (int *)&tvp32->tv_sec);
put_user(usec, (int *)&tvp32->tv_usec);
}
if (ret < 0)
goto out;
if (!ret) {
ret = -ERESTARTNOHAND;
if (signal_pending(current))
goto out;
ret = 0;
}
set_fd_set(n, inp, fds.res_in);
set_fd_set(n, outp, fds.res_out);
set_fd_set(n, exp, fds.res_ex);
out:
kfree(bits);
out_nofds:
return ret;
}
struct sel_arg_struct {
unsigned int n;
unsigned int inp;
unsigned int outp;
unsigned int exp;
unsigned int tvp;
};
asmlinkage long
sys32_old_select(struct sel_arg_struct *arg)
{
struct sel_arg_struct a;
if (copy_from_user(&a, arg, sizeof(a)))
return -EFAULT;
return sys32_select(a.n, (fd_set *)A(a.inp), (fd_set *)A(a.outp), (fd_set *)A(a.exp),
(struct compat_timeval *)A(a.tvp));
}
asmlinkage ssize_t sys_readv(unsigned long,const struct iovec *,unsigned long);
asmlinkage ssize_t sys_writev(unsigned long,const struct iovec *,unsigned long);
static struct iovec *
get_compat_iovec(struct compat_iovec *iov32, struct iovec *iov_buf, u32 *count, int type, int *errp)
{
int i;
u32 buf, len;
struct iovec *ivp, *iov;
unsigned long totlen;
/* Get the "struct iovec" from user memory */
*errp = 0;
if (!*count)
return 0;
*errp = -EINVAL;
if (*count > UIO_MAXIOV)
return(struct iovec *)0;
*errp = -EFAULT;
if(verify_area(VERIFY_READ, iov32, sizeof(struct compat_iovec)*(*count)))
return(struct iovec *)0;
if (*count > UIO_FASTIOV) {
*errp = -ENOMEM;
iov = kmalloc(*count*sizeof(struct iovec), GFP_KERNEL);
if (!iov)
return((struct iovec *)0);
} else
iov = iov_buf;
ivp = iov;
totlen = 0;
for (i = 0; i < *count; i++) {
*errp = __get_user(len, &iov32->iov_len) |
__get_user(buf, &iov32->iov_base);
if (*errp)
goto error;
*errp = verify_area(type, (void *)A(buf), len);
if (*errp) {
if (i > 0) {
*count = i;
break;
}
goto error;
}
/* SuS checks: */
*errp = -EINVAL;
if ((int)len < 0)
goto error;
if ((totlen += len) >= 0x7fffffff)
goto error;
ivp->iov_base = (void *)A(buf);
ivp->iov_len = (__kernel_size_t)len;
iov32++;
ivp++;
}
*errp = 0;
return(iov);
error:
if (iov != iov_buf)
kfree(iov);
return NULL;
}
asmlinkage long
sys32_readv(int fd, struct compat_iovec *vector, u32 count)
{
struct iovec iovstack[UIO_FASTIOV];
struct iovec *iov;
int ret;
mm_segment_t old_fs = get_fs();
if ((iov = get_compat_iovec(vector, iovstack, &count, VERIFY_WRITE, &ret)) == NULL)
return ret;
set_fs(KERNEL_DS);
ret = sys_readv(fd, iov, count);
set_fs(old_fs);
if (iov != iovstack)
kfree(iov);
return ret;
}
asmlinkage long
sys32_writev(int fd, struct compat_iovec *vector, u32 count)
{
struct iovec iovstack[UIO_FASTIOV];
struct iovec *iov;
int ret;
mm_segment_t old_fs = get_fs();
if ((iov = get_compat_iovec(vector, iovstack, &count, VERIFY_READ, &ret)) == NULL)
return ret;
set_fs(KERNEL_DS);
ret = sys_writev(fd, iov, count);
set_fs(old_fs);
if (iov != iovstack)
kfree(iov);
return ret;
}
/*
* sys_time() can be implemented in user-level using
* sys_gettimeofday(). x86-64 did this but i386 Linux did not
* so we have to implement this system call here.
*/
asmlinkage long sys32_time(int * tloc)
{
int i;
/* SMP: This is fairly trivial. We grab CURRENT_TIME and
stuff it to user space. No side effects */
i = get_seconds();
if (tloc) {
if (put_user(i,tloc))
i = -EFAULT;
}
return i;
}
extern asmlinkage long
compat_sys_wait4(compat_pid_t pid, compat_uint_t * stat_addr, int options,
struct compat_rusage *ru);
asmlinkage long
sys32_waitpid(compat_pid_t pid, unsigned int *stat_addr, int options)
{
return compat_sys_wait4(pid, stat_addr, options, NULL);
}
int sys32_ni_syscall(int call)
{
printk(KERN_INFO "IA32 syscall %d from %s not implemented\n", call,
current->comm);
return -ENOSYS;
}
/* 32-bit timeval and related flotsam. */
extern asmlinkage long sys_sysfs(int option, unsigned long arg1,
unsigned long arg2);
asmlinkage long
sys32_sysfs(int option, u32 arg1, u32 arg2)
{
return sys_sysfs(option, arg1, arg2);
}
extern asmlinkage long sys_mount(char * dev_name, char * dir_name, char * type,
unsigned long new_flags, void *data);
static char *badfs[] = {
"smbfs", "ncpfs", NULL
};
static int checktype(char *user_type)
{
int err = 0;
char **s,*kernel_type = getname(user_type);
if (!kernel_type || IS_ERR(kernel_type))
return -EFAULT;
for (s = badfs; *s; ++s)
if (!strcmp(kernel_type, *s)) {
printk(KERN_ERR "mount32: unsupported fs `%s' -- use 64bit mount\n", *s);
err = -EINVAL;
break;
}
putname(user_type);
return err;
}
asmlinkage long
sys32_mount(char *dev_name, char *dir_name, char *type,
unsigned long new_flags, u32 data)
{
int err;
if(!capable(CAP_SYS_ADMIN))
return -EPERM;
err = checktype(type);
if (err)
return err;
return sys_mount(dev_name, dir_name, type, new_flags, (void *)AA(data));
}
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(u32)-sizeof(int)];
};
extern asmlinkage long sys_sysinfo(struct sysinfo *info);
asmlinkage long
sys32_sysinfo(struct sysinfo32 *info)
{
struct sysinfo s;
int ret;
mm_segment_t old_fs = get_fs ();
int bitcount = 0;
set_fs (KERNEL_DS);
ret = sys_sysinfo(&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;
}
if (verify_area(VERIFY_WRITE, info, sizeof(struct sysinfo32)) ||
__put_user (s.uptime, &info->uptime) ||
__put_user (s.loads[0], &info->loads[0]) ||
__put_user (s.loads[1], &info->loads[1]) ||
__put_user (s.loads[2], &info->loads[2]) ||
__put_user (s.totalram, &info->totalram) ||
__put_user (s.freeram, &info->freeram) ||
__put_user (s.sharedram, &info->sharedram) ||
__put_user (s.bufferram, &info->bufferram) ||
__put_user (s.totalswap, &info->totalswap) ||
__put_user (s.freeswap, &info->freeswap) ||
__put_user (s.procs, &info->procs) ||
__put_user (s.totalhigh, &info->totalhigh) ||
__put_user (s.freehigh, &info->freehigh) ||
__put_user (s.mem_unit, &info->mem_unit))
return -EFAULT;
return 0;
}
extern asmlinkage long sys_sched_rr_get_interval(pid_t pid,
struct timespec *interval);
asmlinkage long
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_compat_timespec(&t, interval))
return -EFAULT;
return ret;
}
extern asmlinkage long sys_rt_sigpending(sigset_t *set, size_t sigsetsize);
asmlinkage long
sys32_rt_sigpending(compat_sigset_t *set, compat_size_t sigsetsize)
{
sigset_t s;
compat_sigset_t s32;
int ret;
mm_segment_t old_fs = get_fs();
set_fs (KERNEL_DS);
ret = sys_rt_sigpending(&s, sigsetsize);
set_fs (old_fs);
if (!ret) {
switch (_NSIG_WORDS) {
case 4: s32.sig[7] = (s.sig[3] >> 32); s32.sig[6] = s.sig[3];
case 3: s32.sig[5] = (s.sig[2] >> 32); s32.sig[4] = s.sig[2];
case 2: s32.sig[3] = (s.sig[1] >> 32); s32.sig[2] = s.sig[1];
case 1: s32.sig[1] = (s.sig[0] >> 32); s32.sig[0] = s.sig[0];
}
if (copy_to_user (set, &s32, sizeof(compat_sigset_t)))
return -EFAULT;
}
return ret;
}
siginfo_t32 *
siginfo64to32(siginfo_t32 *d, siginfo_t *s)
{
memset (d, 0, sizeof(siginfo_t32));
d->si_signo = s->si_signo;
d->si_errno = s->si_errno;
d->si_code = s->si_code;
if (s->si_signo >= SIGRTMIN) {
d->si_pid = s->si_pid;
d->si_uid = s->si_uid;
memcpy(&d->si_int, &s->si_int,
sizeof(siginfo_t) - offsetof(siginfo_t,si_int));
} else switch (s->si_signo) {
/* XXX: What about POSIX1.b timers */
case SIGCHLD:
d->si_pid = s->si_pid;
d->si_status = s->si_status;
d->si_utime = s->si_utime;
d->si_stime = s->si_stime;
break;
case SIGSEGV:
case SIGBUS:
case SIGFPE:
case SIGILL:
d->si_addr = (long)(s->si_addr);
// d->si_trapno = s->si_trapno;
break;
case SIGPOLL:
d->si_band = s->si_band;
d->si_fd = s->si_fd;
break;
default:
d->si_pid = s->si_pid;
d->si_uid = s->si_uid;
break;
}
return d;
}
siginfo_t *
siginfo32to64(siginfo_t *d, siginfo_t32 *s)
{
d->si_signo = s->si_signo;
d->si_errno = s->si_errno;
d->si_code = s->si_code;
if (s->si_signo >= SIGRTMIN) {
d->si_pid = s->si_pid;
d->si_uid = s->si_uid;
memcpy(&d->si_int,
&s->si_int,
sizeof(siginfo_t) - offsetof(siginfo_t, si_int));
} else switch (s->si_signo) {
/* XXX: What about POSIX1.b timers */
case SIGCHLD:
d->si_pid = s->si_pid;
d->si_status = s->si_status;
d->si_utime = s->si_utime;
d->si_stime = s->si_stime;
break;
case SIGSEGV:
case SIGBUS:
case SIGFPE:
case SIGILL:
d->si_addr = (void *)A(s->si_addr);
// d->si_trapno = s->si_trapno;
break;
case SIGPOLL:
d->si_band = s->si_band;
d->si_fd = s->si_fd;
break;
default:
d->si_pid = s->si_pid;
d->si_uid = s->si_uid;
break;
}
return d;
}
extern asmlinkage long
sys_rt_sigtimedwait(const sigset_t *uthese, siginfo_t *uinfo,
const struct timespec *uts, size_t sigsetsize);
asmlinkage long
sys32_rt_sigtimedwait(compat_sigset_t *uthese, siginfo_t32 *uinfo,
struct compat_timespec *uts, compat_size_t sigsetsize)
{
sigset_t s;
compat_sigset_t s32;
struct timespec t;
int ret;
mm_segment_t old_fs = get_fs();
siginfo_t info;
siginfo_t32 info32;
if (copy_from_user (&s32, uthese, sizeof(compat_sigset_t)))
return -EFAULT;
switch (_NSIG_WORDS) {
case 4: s.sig[3] = s32.sig[6] | (((long)s32.sig[7]) << 32);
case 3: s.sig[2] = s32.sig[4] | (((long)s32.sig[5]) << 32);
case 2: s.sig[1] = s32.sig[2] | (((long)s32.sig[3]) << 32);
case 1: s.sig[0] = s32.sig[0] | (((long)s32.sig[1]) << 32);
}
if (uts && get_compat_timespec(&t, uts))
return -EFAULT;
set_fs (KERNEL_DS);
ret = sys_rt_sigtimedwait(&s, uinfo ? &info : NULL, uts ? &t : NULL,
sigsetsize);
set_fs (old_fs);
if (ret >= 0 && uinfo) {
if (copy_to_user (uinfo, siginfo64to32(&info32, &info),
sizeof(siginfo_t32)))
return -EFAULT;
}
return ret;
}
extern asmlinkage long
sys_rt_sigqueueinfo(int pid, int sig, siginfo_t *uinfo);
asmlinkage long
sys32_rt_sigqueueinfo(int pid, int sig, siginfo_t32 *uinfo)
{
siginfo_t info;
siginfo_t32 info32;
int ret;
mm_segment_t old_fs = get_fs();
if (copy_from_user (&info32, uinfo, sizeof(siginfo_t32)))
return -EFAULT;
/* XXX: Is this correct? */
siginfo32to64(&info, &info32);
set_fs (KERNEL_DS);
ret = sys_rt_sigqueueinfo(pid, sig, &info);
set_fs (old_fs);
return ret;
}
/* These are here just in case some old ia32 binary calls it. */
asmlinkage long
sys32_pause(void)
{
current->state = TASK_INTERRUPTIBLE;
schedule();
return -ERESTARTNOHAND;
}
struct sysctl_ia32 {
unsigned int name;
int nlen;
unsigned int oldval;
unsigned int oldlenp;
unsigned int newval;
unsigned int newlen;
unsigned int __unused[4];
};
asmlinkage long
sys32_sysctl(struct sysctl_ia32 *args32)
{
#ifndef CONFIG_SYSCTL
return -ENOSYS;
#else
struct sysctl_ia32 a32;
mm_segment_t old_fs = get_fs ();
void *oldvalp, *newvalp;
size_t oldlen;
int *namep;
long ret;
extern int do_sysctl(int *name, int nlen, void *oldval, size_t *oldlenp,
void *newval, size_t newlen);
if (copy_from_user(&a32, args32, sizeof (a32)))
return -EFAULT;
/*
* We need to pre-validate these because we have to disable address checking
* before calling do_sysctl() because of OLDLEN but we can't run the risk of the
* user specifying bad addresses here. Well, since we're dealing with 32 bit
* addresses, we KNOW that access_ok() will always succeed, so this is an
* expensive NOP, but so what...
*/
namep = (int *) A(a32.name);
oldvalp = (void *) A(a32.oldval);
newvalp = (void *) A(a32.newval);
if ((oldvalp && get_user(oldlen, (int *) A(a32.oldlenp)))
|| !access_ok(VERIFY_WRITE, namep, 0)
|| !access_ok(VERIFY_WRITE, oldvalp, 0)
|| !access_ok(VERIFY_WRITE, newvalp, 0))
return -EFAULT;
set_fs(KERNEL_DS);
lock_kernel();
ret = do_sysctl(namep, a32.nlen, oldvalp, &oldlen, newvalp, (size_t) a32.newlen);
unlock_kernel();
set_fs(old_fs);
if (oldvalp && put_user (oldlen, (int *) A(a32.oldlenp)))
return -EFAULT;
return ret;
#endif
}
extern asmlinkage ssize_t sys_pread64(unsigned int fd, char * buf,
size_t count, loff_t pos);
extern asmlinkage ssize_t sys_pwrite64(unsigned int fd, const char * buf,
size_t count, loff_t pos);
/* warning: next two assume little endian */
asmlinkage long
sys32_pread(unsigned int fd, char *ubuf, u32 count, u32 poslo, u32 poshi)
{
return sys_pread64(fd, ubuf, count,
((loff_t)AA(poshi) << 32) | AA(poslo));
}
asmlinkage long
sys32_pwrite(unsigned int fd, char *ubuf, u32 count, u32 poslo, u32 poshi)
{
return sys_pwrite64(fd, ubuf, count,
((loff_t)AA(poshi) << 32) | AA(poslo));
}
extern asmlinkage long sys_personality(unsigned long);
asmlinkage long
sys32_personality(unsigned long personality)
{
int ret;
if (personality(current->personality) == PER_LINUX32 &&
personality == PER_LINUX)
personality = PER_LINUX32;
ret = sys_personality(personality);
if (ret == PER_LINUX32)
ret = PER_LINUX;
return ret;
}
extern asmlinkage ssize_t sys_sendfile(int out_fd, int in_fd, off_t *offset,
size_t count);
asmlinkage long
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 (!ret && offset && put_user(of, offset))
return -EFAULT;
return ret;
}
extern asmlinkage long sys_modify_ldt(int func, void *ptr,
unsigned long bytecount);
asmlinkage long sys32_modify_ldt(int func, void *ptr, unsigned long bytecount)
{
long ret;
if (func == 0x1 || func == 0x11) {
struct user_desc info;
mm_segment_t old_fs = get_fs();
if (bytecount != sizeof(struct user_desc))
return -EINVAL;
if (copy_from_user(&info, ptr, sizeof(struct user_desc)))
return -EFAULT;
/* lm bit was undefined in the 32bit ABI and programs
give it random values. Force it to zero here. */
info.lm = 0;
set_fs(KERNEL_DS);
ret = sys_modify_ldt(func, &info, bytecount);
set_fs(old_fs);
} else {
ret = sys_modify_ldt(func, ptr, bytecount);
}
return ret;
}
/* 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 long
sys32_adjtimex(struct timex32 *utp)
{
struct timex txc;
int ret;
memset(&txc, 0, sizeof(struct timex));
if(verify_area(VERIFY_READ, utp, sizeof(struct timex32)) ||
__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(verify_area(VERIFY_WRITE, utp, sizeof(struct timex32)) ||
__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 long sys32_mmap2(unsigned long addr, unsigned long len,
unsigned long prot, unsigned long flags,
unsigned long fd, unsigned long pgoff)
{
struct mm_struct *mm = current->mm;
unsigned long error;
struct file * file = NULL;
flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
if (!(flags & MAP_ANONYMOUS)) {
file = fget(fd);
if (!file)
return -EBADF;
}
if (prot & PROT_READ)
prot |= vm_force_exec32;
down_write(&mm->mmap_sem);
error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff);
up_write(&mm->mmap_sem);
if (file)
fput(file);
return error;
}
asmlinkage long sys32_olduname(struct oldold_utsname * name)
{
int error;
if (!name)
return -EFAULT;
if (!access_ok(VERIFY_WRITE,name,sizeof(struct oldold_utsname)))
return -EFAULT;
down_read(&uts_sem);
error = __copy_to_user(&name->sysname,&system_utsname.sysname,__OLD_UTS_LEN);
__put_user(0,name->sysname+__OLD_UTS_LEN);
__copy_to_user(&name->nodename,&system_utsname.nodename,__OLD_UTS_LEN);
__put_user(0,name->nodename+__OLD_UTS_LEN);
__copy_to_user(&name->release,&system_utsname.release,__OLD_UTS_LEN);
__put_user(0,name->release+__OLD_UTS_LEN);
__copy_to_user(&name->version,&system_utsname.version,__OLD_UTS_LEN);
__put_user(0,name->version+__OLD_UTS_LEN);
{
char *arch = "x86_64";
if (personality(current->personality) == PER_LINUX32)
arch = "i686";
__copy_to_user(&name->machine,arch,strlen(arch)+1);
}
up_read(&uts_sem);
error = error ? -EFAULT : 0;
return error;
}
long sys32_uname(struct old_utsname * name)
{
int err;
if (!name)
return -EFAULT;
down_read(&uts_sem);
err=copy_to_user(name, &system_utsname, sizeof (*name));
up_read(&uts_sem);
if (personality(current->personality) == PER_LINUX32)
err |= copy_to_user(&name->machine, "i686", 5);
return err?-EFAULT:0;
}
extern int sys_ustat(dev_t, struct ustat *);
long sys32_ustat(unsigned dev, struct ustat32 *u32p)
{
struct ustat u;
mm_segment_t seg;
int ret;
seg = get_fs();
set_fs(KERNEL_DS);
ret = sys_ustat(dev,&u);
set_fs(seg);
if (ret >= 0) {
if (!access_ok(VERIFY_WRITE,u32p,sizeof(struct ustat32)) ||
__put_user((__u32) u.f_tfree, &u32p->f_tfree) ||
__put_user((__u32) u.f_tinode, &u32p->f_tfree) ||
__copy_to_user(&u32p->f_fname, u.f_fname, sizeof(u.f_fname)) ||
__copy_to_user(&u32p->f_fpack, u.f_fpack, sizeof(u.f_fpack)))
ret = -EFAULT;
}
return ret;
}
static int nargs(u32 src, char **dst)
{
int cnt;
u32 val;
cnt = 0;
do {
int ret = get_user(val, (__u32 *)(u64)src);
if (ret)
return ret;
if (dst)
dst[cnt] = (char *)(u64)val;
cnt++;
src += 4;
if (cnt >= (MAX_ARG_PAGES*PAGE_SIZE)/sizeof(void*))
return -E2BIG;
} while(val);
if (dst)
dst[cnt-1] = 0;
return cnt;
}
asmlinkage long sys32_execve(char *name, u32 argv, u32 envp, struct pt_regs regs)
{
mm_segment_t oldseg;
char **buf = NULL;
int na = 0,ne = 0;
int ret;
unsigned sz = 0;
if (argv) {
na = nargs(argv, NULL);
if (na < 0)
return -EFAULT;
}
if (envp) {
ne = nargs(envp, NULL);
if (ne < 0)
return -EFAULT;
}
if (argv || envp) {
sz = (na+ne)*sizeof(void *);
if (sz > PAGE_SIZE)
buf = vmalloc(sz);
else
buf = kmalloc(sz, GFP_KERNEL);
if (!buf)
return -ENOMEM;
}
if (argv) {
ret = nargs(argv, buf);
if (ret < 0)
goto free;
}
if (envp) {
ret = nargs(envp, buf + na);
if (ret < 0)
goto free;
}
name = getname(name);
ret = PTR_ERR(name);
if (IS_ERR(name))
goto free;
oldseg = get_fs();
set_fs(KERNEL_DS);
ret = do_execve(name, argv ? buf : NULL, envp ? buf+na : NULL, ®s);
set_fs(oldseg);
if (ret == 0)
current->ptrace &= ~PT_DTRACE;
putname(name);
free:
if (argv || envp) {
if (sz > PAGE_SIZE)
vfree(buf);
else
kfree(buf);
}
return ret;
}
asmlinkage long sys32_clone(unsigned int clone_flags, unsigned int newsp, struct pt_regs regs)
{
void *parent_tid = (void *)regs.rdx;
void *child_tid = (void *)regs.rdi;
if (!newsp)
newsp = regs.rsp;
return do_fork(clone_flags & ~CLONE_IDLETASK, newsp, ®s, 0,
parent_tid, child_tid);
}
/*
* Some system calls that need sign extended arguments. This could be done by a generic wrapper.
*/
extern off_t sys_lseek (unsigned int fd, off_t offset, unsigned int origin);
long sys32_lseek (unsigned int fd, int offset, unsigned int whence)
{
return sys_lseek(fd, offset, whence);
}
extern int sys_kill(pid_t pid, int sig);
long sys32_kill(int pid, int sig)
{
return sys_kill(pid, sig);
}
#if defined(CONFIG_NFSD) || defined(CONFIG_NFSD_MODULE)
/* Stuff for NFS server syscalls... */
struct nfsctl_svc32 {
u16 svc32_port;
s32 svc32_nthreads;
};
struct nfsctl_client32 {
s8 cl32_ident[NFSCLNT_IDMAX+1];
s32 cl32_naddr;
struct in_addr cl32_addrlist[NFSCLNT_ADDRMAX];
s32 cl32_fhkeytype;
s32 cl32_fhkeylen;
u8 cl32_fhkey[NFSCLNT_KEYMAX];
};
struct nfsctl_export32 {
s8 ex32_client[NFSCLNT_IDMAX+1];
s8 ex32_path[NFS_MAXPATHLEN+1];
compat_dev_t ex32_dev;
compat_ino_t ex32_ino;
s32 ex32_flags;
compat_pid_t ex32_anon_uid;
compat_gid_t ex32_anon_gid;
};
struct nfsctl_fdparm32 {
struct sockaddr gd32_addr;
s8 gd32_path[NFS_MAXPATHLEN+1];
s32 gd32_version;
};
struct nfsctl_fsparm32 {
struct sockaddr gd32_addr;
s8 gd32_path[NFS_MAXPATHLEN+1];
s32 gd32_maxlen;
};
struct nfsctl_arg32 {
s32 ca32_version; /* safeguard */
union {
struct nfsctl_svc32 u32_svc;
struct nfsctl_client32 u32_client;
struct nfsctl_export32 u32_export;
struct nfsctl_fdparm32 u32_getfd;
struct nfsctl_fsparm32 u32_getfs;
} u;
#define ca32_svc u.u32_svc
#define ca32_client u.u32_client
#define ca32_export u.u32_export
#define ca32_getfd u.u32_getfd
#define ca32_getfs u.u32_getfs
};
union nfsctl_res32 {
__u8 cr32_getfh[NFS_FHSIZE];
struct knfsd_fh cr32_getfs;
};
static int nfs_svc32_trans(struct nfsctl_arg *karg, struct nfsctl_arg32 *arg32)
{
int err;
err = get_user(karg->ca_version, &arg32->ca32_version);
err |= __get_user(karg->ca_svc.svc_port, &arg32->ca32_svc.svc32_port);
err |= __get_user(karg->ca_svc.svc_nthreads, &arg32->ca32_svc.svc32_nthreads);
return err;
}
static int nfs_clnt32_trans(struct nfsctl_arg *karg, struct nfsctl_arg32 *arg32)
{
int err;
err = get_user(karg->ca_version, &arg32->ca32_version);
err |= copy_from_user(&karg->ca_client.cl_ident[0],
&arg32->ca32_client.cl32_ident[0],
NFSCLNT_IDMAX);
err |= __get_user(karg->ca_client.cl_naddr, &arg32->ca32_client.cl32_naddr);
err |= copy_from_user(&karg->ca_client.cl_addrlist[0],
&arg32->ca32_client.cl32_addrlist[0],
(sizeof(struct in_addr) * NFSCLNT_ADDRMAX));
err |= __get_user(karg->ca_client.cl_fhkeytype,
&arg32->ca32_client.cl32_fhkeytype);
err |= __get_user(karg->ca_client.cl_fhkeylen,
&arg32->ca32_client.cl32_fhkeylen);
err |= copy_from_user(&karg->ca_client.cl_fhkey[0],
&arg32->ca32_client.cl32_fhkey[0],
NFSCLNT_KEYMAX);
return err;
}
static int nfs_exp32_trans(struct nfsctl_arg *karg, struct nfsctl_arg32 *arg32)
{
int err;
err = get_user(karg->ca_version, &arg32->ca32_version);
err |= copy_from_user(&karg->ca_export.ex_client[0],
&arg32->ca32_export.ex32_client[0],
NFSCLNT_IDMAX);
err |= copy_from_user(&karg->ca_export.ex_path[0],
&arg32->ca32_export.ex32_path[0],
NFS_MAXPATHLEN);
err |= __get_user(karg->ca_export.ex_dev,
&arg32->ca32_export.ex32_dev);
err |= __get_user(karg->ca_export.ex_ino,
&arg32->ca32_export.ex32_ino);
err |= __get_user(karg->ca_export.ex_flags,
&arg32->ca32_export.ex32_flags);
err |= __get_user(karg->ca_export.ex_anon_uid,
&arg32->ca32_export.ex32_anon_uid);
err |= __get_user(karg->ca_export.ex_anon_gid,
&arg32->ca32_export.ex32_anon_gid);
SET_UID(karg->ca_export.ex_anon_uid, karg->ca_export.ex_anon_uid);
SET_GID(karg->ca_export.ex_anon_gid, karg->ca_export.ex_anon_gid);
return err;
}
static int nfs_getfd32_trans(struct nfsctl_arg *karg, struct nfsctl_arg32 *arg32)
{
int err;
err = get_user(karg->ca_version, &arg32->ca32_version);
err |= copy_from_user(&karg->ca_getfd.gd_addr,
&arg32->ca32_getfd.gd32_addr,
(sizeof(struct sockaddr)));
err |= copy_from_user(&karg->ca_getfd.gd_path,
&arg32->ca32_getfd.gd32_path,
(NFS_MAXPATHLEN+1));
err |= get_user(karg->ca_getfd.gd_version,
&arg32->ca32_getfd.gd32_version);
return err;
}
static int nfs_getfs32_trans(struct nfsctl_arg *karg, struct nfsctl_arg32 *arg32)
{
int err;
err = get_user(karg->ca_version, &arg32->ca32_version);
err |= copy_from_user(&karg->ca_getfs.gd_addr,
&arg32->ca32_getfs.gd32_addr,
(sizeof(struct sockaddr)));
err |= copy_from_user(&karg->ca_getfs.gd_path,
&arg32->ca32_getfs.gd32_path,
(NFS_MAXPATHLEN+1));
err |= get_user(karg->ca_getfs.gd_maxlen,
&arg32->ca32_getfs.gd32_maxlen);
return err;
}
/* This really doesn't need translations, we are only passing
* back a union which contains opaque nfs file handle data.
*/
static int nfs_getfh32_res_trans(union nfsctl_res *kres, union nfsctl_res32 *res32)
{
return copy_to_user(res32, kres, sizeof(*res32)) ? -EFAULT : 0;
}
long asmlinkage sys32_nfsservctl(int cmd, struct nfsctl_arg32 *arg32, union nfsctl_res32 *res32)
{
struct nfsctl_arg *karg = NULL;
union nfsctl_res *kres = NULL;
mm_segment_t oldfs;
int err;
karg = kmalloc(sizeof(*karg), GFP_USER);
if(!karg)
return -ENOMEM;
if(res32) {
kres = kmalloc(sizeof(*kres), GFP_USER);
if(!kres) {
kfree(karg);
return -ENOMEM;
}
}
switch(cmd) {
case NFSCTL_SVC:
err = nfs_svc32_trans(karg, arg32);
break;
case NFSCTL_ADDCLIENT:
err = nfs_clnt32_trans(karg, arg32);
break;
case NFSCTL_DELCLIENT:
err = nfs_clnt32_trans(karg, arg32);
break;
case NFSCTL_EXPORT:
case NFSCTL_UNEXPORT:
err = nfs_exp32_trans(karg, arg32);
break;
case NFSCTL_GETFD:
err = nfs_getfd32_trans(karg, arg32);
break;
case NFSCTL_GETFS:
err = nfs_getfs32_trans(karg, arg32);
break;
default:
err = -EINVAL;
break;
}
if(err)
goto done;
oldfs = get_fs();
set_fs(KERNEL_DS);
err = sys_nfsservctl(cmd, karg, kres);
set_fs(oldfs);
if (err)
goto done;
if((cmd == NFSCTL_GETFD) ||
(cmd == NFSCTL_GETFS))
err = nfs_getfh32_res_trans(kres, res32);
done:
if(karg)
kfree(karg);
if(kres)
kfree(kres);
return err;
}
#else /* !NFSD */
extern asmlinkage long sys_ni_syscall(void);
long asmlinkage sys32_nfsservctl(int cmd, void *notused, void *notused2)
{
return sys_ni_syscall();
}
#endif
extern long sys_io_setup(unsigned nr_reqs, aio_context_t *ctx);
long sys32_io_setup(unsigned nr_reqs, u32 *ctx32p)
{
long ret;
aio_context_t ctx64;
mm_segment_t oldfs = get_fs();
set_fs(KERNEL_DS);
ret = sys_io_setup(nr_reqs, &ctx64);
set_fs(oldfs);
/* truncating is ok because it's a user address */
if (!ret)
ret = put_user((u32)ctx64, ctx32p);
return ret;
}
asmlinkage long sys32_io_submit(aio_context_t ctx_id, int nr,
compat_uptr_t *iocbpp)
{
struct kioctx *ctx;
long ret = 0;
int i;
if (unlikely(nr < 0))
return -EINVAL;
if (unlikely(!access_ok(VERIFY_READ, iocbpp, (nr*sizeof(*iocbpp)))))
return -EFAULT;
ctx = lookup_ioctx(ctx_id);
if (unlikely(!ctx)) {
pr_debug("EINVAL: io_submit: invalid context id\n");
return -EINVAL;
}
for (i=0; i<nr; i++) {
compat_uptr_t p32;
struct iocb *user_iocb, tmp;
if (unlikely(__get_user(p32, iocbpp + i))) {
ret = -EFAULT;
break;
}
user_iocb = compat_ptr(p32);
if (unlikely(copy_from_user(&tmp, user_iocb, sizeof(tmp)))) {
ret = -EFAULT;
break;
}
ret = io_submit_one(ctx, user_iocb, &tmp);
if (ret)
break;
}
put_ioctx(ctx);
return i ? i : ret;
}
extern asmlinkage long sys_io_getevents(aio_context_t ctx_id,
long min_nr,
long nr,
struct io_event *events,
struct timespec *timeout);
asmlinkage long sys32_io_getevents(aio_context_t ctx_id,
unsigned long min_nr,
unsigned long nr,
struct io_event *events,
struct compat_timespec *timeout)
{
long ret;
mm_segment_t oldfs;
struct timespec t;
/* Harden against bogus ptrace */
if (nr >= 0xffffffff ||
!access_ok(VERIFY_WRITE, events, nr * sizeof(struct io_event)))
return -EFAULT;
if (timeout && get_compat_timespec(&t, timeout))
return -EFAULT;
oldfs = get_fs();
set_fs(KERNEL_DS);
ret = sys_io_getevents(ctx_id,min_nr,nr,events,timeout ? &t : NULL);
set_fs(oldfs);
if (!ret && timeout && put_compat_timespec(&t, timeout))
return -EFAULT;
return ret;
}
asmlinkage long sys32_open(const char * filename, int flags, int mode)
{
char * tmp;
int fd, error;
/* don't force O_LARGEFILE */
tmp = getname(filename);
fd = PTR_ERR(tmp);
if (!IS_ERR(tmp)) {
fd = get_unused_fd();
if (fd >= 0) {
struct file *f = filp_open(tmp, flags, mode);
error = PTR_ERR(f);
if (unlikely(IS_ERR(f))) {
put_unused_fd(fd);
fd = error;
} else
fd_install(fd, f);
}
putname(tmp);
}
return fd;
}
struct sigevent32 {
u32 sigev_value;
u32 sigev_signo;
u32 sigev_notify;
u32 payload[(64 / 4) - 3];
};
extern asmlinkage long
sys_timer_create(clockid_t which_clock,
struct sigevent __user *timer_event_spec,
timer_t __user * created_timer_id);
long
sys32_timer_create(u32 clock, struct sigevent32 *se32, timer_t *timer_id)
{
struct sigevent se;
mm_segment_t oldfs;
long err;
if (se32) {
memset(&se, 0, sizeof(struct sigevent));
if (get_user(se.sigev_value.sival_int, &se32->sigev_value) ||
__get_user(se.sigev_signo, &se32->sigev_signo) ||
__get_user(se.sigev_notify, &se32->sigev_notify) ||
__copy_from_user(&se._sigev_un._pad, &se32->payload,
sizeof(se32->payload)))
return -EFAULT;
}
if (!access_ok(VERIFY_WRITE,timer_id,sizeof(timer_t)))
return -EFAULT;
oldfs = get_fs();
set_fs(KERNEL_DS);
err = sys_timer_create(clock, se32 ? &se : NULL, timer_id);
set_fs(oldfs);
return err;
}
extern long sys_fadvise64_64(int fd, loff_t offset, loff_t len, int advice);
long sys32_fadvise64_64(int fd, __u32 offset_low, __u32 offset_high,
__u32 len_low, __u32 len_high, int advice)
{
return sys_fadvise64_64(fd,
(((u64)offset_high)<<32) | offset_low,
(((u64)len_high)<<32) | len_low,
advice);
}
long sys32_vm86_warning(void)
{
struct task_struct *me = current;
static char lastcomm[8];
if (strcmp(lastcomm, me->comm)) {
printk(KERN_INFO "%s: vm86 mode not supported on 64 bit kernel\n",
me->comm);
strcpy(lastcomm, me->comm);
}
return -ENOSYS;
}
struct exec_domain ia32_exec_domain = {
.name = "linux/x86",
.pers_low = PER_LINUX32,
.pers_high = PER_LINUX32,
};
static int __init ia32_init (void)
{
printk("IA32 emulation $Id: sys_ia32.c,v 1.32 2002/03/24 13:02:28 ak Exp $\n");
ia32_exec_domain.signal_map = default_exec_domain.signal_map;
ia32_exec_domain.signal_invmap = default_exec_domain.signal_invmap;
register_exec_domain(&ia32_exec_domain);
return 0;
}
__initcall(ia32_init);
extern unsigned long ia32_sys_call_table[];
EXPORT_SYMBOL(ia32_sys_call_table);
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