/*
* 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/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/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/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;
memset(&tmp, 0, sizeof(tmp));
tmp.st_dev = stat->dev;
tmp.st_ino = stat->ino;
tmp.st_mode = stat->mode;
tmp.st_nlink = stat->nlink;
SET_STAT_UID(tmp, stat->uid);
SET_STAT_GID(tmp, stat->gid);
tmp.st_rdev = 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, size_t 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(¤t->mm->mmap_sem);
error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff);
up_write(¤t->mm->mmap_sem);
if (file)
fput(file);
out:
return error;
}
asmlinkage long sys_truncate(const char * path, unsigned long length);
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 long sys_ftruncate(unsigned int fd, unsigned long length);
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);
}
/*
* count32() counts the number of arguments/envelopes
*/
static int count32(u32 * argv, int max)
{
int i = 0;
if (argv != NULL) {
for (;;) {
u32 p; int error;
error = get_user(p,argv);
if (error)
return error;
if (!p)
break;
argv++;
if (++i > max)
return -E2BIG;
}
}
return i;
}
/*
* 'copy_strings32()' copies argument/envelope strings from user
* memory to free pages in kernel mem. These are in a format ready
* to be put directly into the top of new user memory.
*/
int copy_strings32(int argc, u32 * argv, struct linux_binprm *bprm)
{
while (argc-- > 0) {
u32 str;
int len;
unsigned long pos;
if (get_user(str, argv+argc) || !str ||
!(len = strnlen_user((char *)A(str), bprm->p)))
return -EFAULT;
if (bprm->p < len)
return -E2BIG;
bprm->p -= len;
/* XXX: add architecture specific overflow check here. */
pos = bprm->p;
while (len > 0) {
char *kaddr;
int i, new, err;
struct page *page;
int offset, bytes_to_copy;
offset = pos % PAGE_SIZE;
i = pos/PAGE_SIZE;
page = bprm->page[i];
new = 0;
if (!page) {
page = alloc_page(GFP_HIGHUSER);
bprm->page[i] = page;
if (!page)
return -ENOMEM;
new = 1;
}
kaddr = kmap(page);
if (new && offset)
memset(kaddr, 0, offset);
bytes_to_copy = PAGE_SIZE - offset;
if (bytes_to_copy > len) {
bytes_to_copy = len;
if (new)
memset(kaddr+offset+len, 0,
PAGE_SIZE-offset-len);
}
err = copy_from_user(kaddr + offset, (char *)A(str),
bytes_to_copy);
flush_dcache_page(page);
kunmap(page);
if (err)
return -EFAULT;
pos += bytes_to_copy;
str += bytes_to_copy;
len -= bytes_to_copy;
}
}
return 0;
}
/*
* sys32_execve() executes a new program.
*/
static inline int
do_execve32(char * filename, u32 * argv, u32 * envp, struct pt_regs * regs)
{
struct linux_binprm bprm;
struct file * file;
int retval;
int i;
file = open_exec(filename);
retval = PTR_ERR(file);
if (IS_ERR(file))
return retval;
bprm.p = PAGE_SIZE*MAX_ARG_PAGES-sizeof(void *);
memset(bprm.page, 0, MAX_ARG_PAGES * sizeof(bprm.page[0]));
bprm.file = file;
bprm.filename = filename;
bprm.sh_bang = 0;
bprm.loader = 0;
bprm.exec = 0;
bprm.security = NULL;
bprm.mm = mm_alloc();
retval = -ENOMEM;
if (!bprm.mm)
goto out_file;
retval = init_new_context(current, bprm.mm);
if (retval < 0)
goto out_mm;
bprm.argc = count32(argv, bprm.p / sizeof(u32));
if ((retval = bprm.argc) < 0)
goto out_mm;
bprm.envc = count32(envp, bprm.p / sizeof(u32));
if ((retval = bprm.envc) < 0)
goto out_mm;
if ((retval = security_bprm_alloc(&bprm)))
goto out;
retval = prepare_binprm(&bprm);
if (retval < 0)
goto out;
retval = copy_strings_kernel(1, &bprm.filename, &bprm);
if (retval < 0)
goto out;
bprm.exec = bprm.p;
retval = copy_strings32(bprm.envc, envp, &bprm);
if (retval < 0)
goto out;
retval = copy_strings32(bprm.argc, argv, &bprm);
if (retval < 0)
goto out;
retval = search_binary_handler(&bprm, regs);
if (retval >= 0) {
/* execve success */
security_bprm_free(&bprm);
return retval;
}
out:
/* Something went wrong, return the inode and free the argument pages*/
for (i = 0 ; i < MAX_ARG_PAGES ; i++) {
struct page * page = bprm.page[i];
if (page)
__free_page(page);
}
if (bprm.security)
security_bprm_free(&bprm);
out_mm:
mmdrop(bprm.mm);
out_file:
if (bprm.file) {
allow_write_access(bprm.file);
fput(bprm.file);
}
return retval;
}
/*
* sys_execve() executes a new program.
*/
asmlinkage int sys32_execve(abi64_no_regargs, struct pt_regs regs)
{
int error;
char * filename;
filename = getname((char *) (long)regs.regs[4]);
printk("Executing: %s\n", filename);
error = PTR_ERR(filename);
if (IS_ERR(filename))
goto out;
error = do_execve32(filename, (u32 *) (long)regs.regs[5],
(u32 *) (long)regs.regs[6], ®s);
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 sys_getdents(unsigned int fd, void * dirent, unsigned int count);
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);
}
struct rusage32 {
struct compat_timeval ru_utime;
struct compat_timeval ru_stime;
int ru_maxrss;
int ru_ixrss;
int ru_idrss;
int ru_isrss;
int ru_minflt;
int ru_majflt;
int ru_nswap;
int ru_inblock;
int ru_oublock;
int ru_msgsnd;
int ru_msgrcv;
int ru_nsignals;
int ru_nvcsw;
int ru_nivcsw;
};
static int
put_rusage (struct rusage32 *ru, struct rusage *r)
{
int err;
if (verify_area(VERIFY_WRITE, ru, sizeof *ru))
return -EFAULT;
err = __put_user (r->ru_utime.tv_sec, &ru->ru_utime.tv_sec);
err |= __put_user (r->ru_utime.tv_usec, &ru->ru_utime.tv_usec);
err |= __put_user (r->ru_stime.tv_sec, &ru->ru_stime.tv_sec);
err |= __put_user (r->ru_stime.tv_usec, &ru->ru_stime.tv_usec);
err |= __put_user (r->ru_maxrss, &ru->ru_maxrss);
err |= __put_user (r->ru_ixrss, &ru->ru_ixrss);
err |= __put_user (r->ru_idrss, &ru->ru_idrss);
err |= __put_user (r->ru_isrss, &ru->ru_isrss);
err |= __put_user (r->ru_minflt, &ru->ru_minflt);
err |= __put_user (r->ru_majflt, &ru->ru_majflt);
err |= __put_user (r->ru_nswap, &ru->ru_nswap);
err |= __put_user (r->ru_inblock, &ru->ru_inblock);
err |= __put_user (r->ru_oublock, &ru->ru_oublock);
err |= __put_user (r->ru_msgsnd, &ru->ru_msgsnd);
err |= __put_user (r->ru_msgrcv, &ru->ru_msgrcv);
err |= __put_user (r->ru_nsignals, &ru->ru_nsignals);
err |= __put_user (r->ru_nvcsw, &ru->ru_nvcsw);
err |= __put_user (r->ru_nivcsw, &ru->ru_nivcsw);
return err;
}
asmlinkage int
sys32_wait4(__kernel_pid_t32 pid, unsigned int * stat_addr, int options,
struct rusage32 * ru)
{
if (!ru)
return sys_wait4(pid, stat_addr, options, NULL);
else {
struct rusage r;
int ret;
unsigned int status;
mm_segment_t old_fs = get_fs();
set_fs(KERNEL_DS);
ret = sys_wait4(pid, stat_addr ? &status : NULL, options, &r);
set_fs(old_fs);
if (put_rusage (ru, &r)) return -EFAULT;
if (stat_addr && put_user (status, stat_addr))
return -EFAULT;
return ret;
}
}
asmlinkage int
sys32_waitpid(__kernel_pid_t32 pid, unsigned int *stat_addr, int options)
{
return sys32_wait4(pid, stat_addr, options, NULL);
}
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];
};
extern asmlinkage int sys_sysinfo(struct sysinfo *info);
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);
}
extern asmlinkage long sys_llseek(unsigned int fd, unsigned long offset_high,
unsigned long offset_low, loff_t * result,
unsigned int origin);
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);
}
typedef ssize_t (*IO_fn_t)(struct file *, char *, size_t, loff_t *);
static long
do_readv_writev32(int type, struct file *file, const struct compat_iovec *vector,
u32 count)
{
unsigned long tot_len;
struct iovec iovstack[UIO_FASTIOV];
struct iovec *iov=iovstack, *ivp;
struct inode *inode;
long retval, i;
IO_fn_t fn;
/* First get the "struct iovec" from user memory and
* verify all the pointers
*/
if (!count)
return 0;
if(verify_area(VERIFY_READ, vector, sizeof(struct compat_iovec)*count))
return -EFAULT;
if (count > UIO_MAXIOV)
return -EINVAL;
if (count > UIO_FASTIOV) {
iov = kmalloc(count*sizeof(struct iovec), GFP_KERNEL);
if (!iov)
return -ENOMEM;
}
tot_len = 0;
i = count;
ivp = iov;
while (i > 0) {
u32 len;
u32 buf;
__get_user(len, &vector->iov_len);
__get_user(buf, &vector->iov_base);
tot_len += len;
ivp->iov_base = (void *)A(buf);
ivp->iov_len = (__kernel_size_t) len;
vector++;
ivp++;
i--;
}
inode = file->f_dentry->d_inode;
/* VERIFY_WRITE actually means a read, as we write to user space */
retval = locks_verify_area((type == VERIFY_WRITE
? FLOCK_VERIFY_READ : FLOCK_VERIFY_WRITE),
inode, file, file->f_pos, tot_len);
if (retval) {
if (iov != iovstack)
kfree(iov);
return retval;
}
/* Then do the actual IO. Note that sockets need to be handled
* specially as they have atomicity guarantees and can handle
* iovec's natively
*/
if (inode->i_sock) {
int err;
err = sock_readv_writev(type, inode, file, iov, count, tot_len);
if (iov != iovstack)
kfree(iov);
return err;
}
if (!file->f_op) {
if (iov != iovstack)
kfree(iov);
return -EINVAL;
}
/* VERIFY_WRITE actually means a read, as we write to user space */
fn = file->f_op->read;
if (type == VERIFY_READ)
fn = (IO_fn_t) file->f_op->write;
ivp = iov;
while (count > 0) {
void * base;
int len, nr;
base = ivp->iov_base;
len = ivp->iov_len;
ivp++;
count--;
nr = fn(file, base, len, &file->f_pos);
if (nr < 0) {
if (retval)
break;
retval = nr;
break;
}
retval += nr;
if (nr != len)
break;
}
if (iov != iovstack)
kfree(iov);
return retval;
}
asmlinkage long
sys32_readv(int fd, struct compat_iovec *vector, u32 count)
{
struct file *file;
ssize_t ret;
ret = -EBADF;
file = fget(fd);
if (!file)
goto bad_file;
if (file->f_op && (file->f_mode & FMODE_READ) &&
(file->f_op->readv || file->f_op->read))
ret = do_readv_writev32(VERIFY_WRITE, file, vector, count);
fput(file);
bad_file:
return ret;
}
asmlinkage long
sys32_writev(int fd, struct compat_iovec *vector, u32 count)
{
struct file *file;
ssize_t ret;
ret = -EBADF;
file = fget(fd);
if(!file)
goto bad_file;
if (file->f_op && (file->f_mode & FMODE_WRITE) &&
(file->f_op->writev || file->f_op->write))
ret = do_readv_writev32(VERIFY_READ, file, vector, count);
fput(file);
bad_file:
return ret;
}
/* 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 = locks_verify_area(FLOCK_VERIFY_READ, file->f_dentry->d_inode,
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 = 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 = locks_verify_area(FLOCK_VERIFY_WRITE, file->f_dentry->d_inode,
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 = write(file, buf, count, &pos);
if (ret > 0)
dnotify_parent(file->f_dentry, DN_MODIFY);
out:
fput(file);
bad_file:
return ret;
}
/*
* Ooo, nasty. We need here to frob 32-bit unsigned longs to
* 64-bit unsigned longs.
*/
static inline int
get_fd_set32(unsigned long n, unsigned long *fdset, u32 *ufdset)
{
if (ufdset) {
unsigned long odd;
if (verify_area(VERIFY_WRITE, ufdset, n*sizeof(u32)))
return -EFAULT;
odd = n & 1UL;
n &= ~1UL;
while (n) {
unsigned long h, l;
__get_user(l, ufdset);
__get_user(h, ufdset+1);
ufdset += 2;
*fdset++ = h << 32 | l;
n -= 2;
}
if (odd)
__get_user(*fdset, ufdset);
} else {
/* Tricky, must clear full unsigned long in the
* kernel fdset at the end, this makes sure that
* actually happens.
*/
memset(fdset, 0, ((n + 1) & ~1)*sizeof(u32));
}
return 0;
}
static inline void
set_fd_set32(unsigned long n, u32 *ufdset, unsigned long *fdset)
{
unsigned long odd;
if (!ufdset)
return;
odd = n & 1UL;
n &= ~1UL;
while (n) {
unsigned long h, l;
l = *fdset++;
h = l >> 32;
__put_user(l, ufdset);
__put_user(h, ufdset+1);
ufdset += 2;
n -= 2;
}
if (odd)
__put_user(*fdset, ufdset);
}
/*
* 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)
asmlinkage int sys32_select(int n, u32 *inp, u32 *outp, u32 *exp, struct compat_timeval *tvp)
{
fd_set_bits fds;
char *bits;
unsigned long nn;
long timeout;
int ret, size;
timeout = MAX_SCHEDULE_TIMEOUT;
if (tvp) {
time_t sec, usec;
if ((ret = verify_area(VERIFY_READ, tvp, sizeof(*tvp)))
|| (ret = __get_user(sec, &tvp->tv_sec))
|| (ret = __get_user(usec, &tvp->tv_usec)))
goto out_nofds;
ret = -EINVAL;
if(sec < 0 || usec < 0)
goto out_nofds;
if ((unsigned long) sec < MAX_SELECT_SECONDS) {
timeout = (usec + 1000000/HZ - 1) / (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);
nn = (n + 8*sizeof(u32) - 1) / (8*sizeof(u32));
if ((ret = get_fd_set32(nn, fds.in, inp)) ||
(ret = get_fd_set32(nn, fds.out, outp)) ||
(ret = get_fd_set32(nn, fds.ex, exp)))
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 (tvp && !(current->personality & STICKY_TIMEOUTS)) {
time_t sec = 0, usec = 0;
if (timeout) {
sec = timeout / HZ;
usec = timeout % HZ;
usec *= (1000000/HZ);
}
put_user(sec, &tvp->tv_sec);
put_user(usec, &tvp->tv_usec);
}
if (ret < 0)
goto out;
if (!ret) {
ret = -ERESTARTNOHAND;
if (signal_pending(current))
goto out;
ret = 0;
}
set_fd_set32(nn, inp, fds.res_in);
set_fd_set32(nn, outp, fds.res_out);
set_fd_set32(nn, exp, fds.res_ex);
out:
kfree(bits);
out_nofds:
return ret;
}
extern asmlinkage int sys_sched_rr_get_interval(pid_t pid,
struct timespec *interval);
asmlinkage int sys32_sched_rr_get_interval(__kernel_pid_t32 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;
__kernel_uid_t32 uid;
__kernel_gid_t32 gid;
__kernel_uid_t32 cuid;
__kernel_gid_t32 cgid;
__kernel_mode_t32 mode;
unsigned short seq;
};
struct ipc64_perm32 {
key_t key;
__kernel_uid_t32 uid;
__kernel_gid_t32 gid;
__kernel_uid_t32 cuid;
__kernel_gid_t32 cgid;
__kernel_mode_t32 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;
__kernel_ipc_pid_t32 msg_lspid;
__kernel_ipc_pid_t32 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;
__kernel_pid_t32 msg_lspid;
__kernel_pid_t32 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;
__kernel_ipc_pid_t32 shm_cpid;
__kernel_ipc_pid_t32 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;
__kernel_pid_t32 shm_cpid;
__kernel_pid_t32 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, 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, (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, (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;
if (version == 1)
return err;
err = sys_shmat (first, uptr, second, &raddr);
if (err)
return err;
err = put_user (raddr, uaddr);
return err;
}
static int
do_sys32_shmctl (int first, int second, void *uptr)
{
int err = -EFAULT, err2;
struct shmid_ds s;
struct shmid64_ds s64;
struct shmid_ds32 *up32 = (struct shmid_ds32 *)uptr;
struct shmid64_ds32 *up64 = (struct shmid64_ds32 *)uptr;
mm_segment_t old_fs;
struct shm_info32 {
int used_ids;
u32 shm_tot, shm_rss, shm_swp;
u32 swap_attempts, swap_successes;
} *uip = (struct shm_info32 *)uptr;
struct shm_info si;
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, &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, (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 = -ENOSYS;
break;
}
return err;
}
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_semop (first, (struct sembuf *)AA(ptr),
second);
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, second, third);
break;
case SHMCTL:
err = do_sys32_shmctl (first, second, (void *)AA(ptr));
break;
default:
err = -EINVAL;
break;
}
return err;
}
struct sysctl_args32
{
__kernel_caddr_t32 name;
int nlen;
__kernel_caddr_t32 oldval;
__kernel_caddr_t32 oldlenp;
__kernel_caddr_t32 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;
}
#else /* CONFIG_SYSCTL */
asmlinkage long sys32_sysctl(struct sysctl_args32 *args)
{
return -ENOSYS;
}
#endif /* CONFIG_SYSCTL */
extern asmlinkage int sys_sched_setaffinity(pid_t pid, unsigned int len,
unsigned long *user_mask_ptr);
asmlinkage int sys32_sched_setaffinity(__kernel_pid_t32 pid, unsigned int len,
u32 *user_mask_ptr)
{
unsigned long kernel_mask;
mm_segment_t old_fs;
int ret;
if (get_user(kernel_mask, user_mask_ptr))
return -EFAULT;
old_fs = get_fs();
set_fs(KERNEL_DS);
ret = sys_sched_setaffinity(pid,
/* XXX Nice api... */
sizeof(kernel_mask),
&kernel_mask);
set_fs(old_fs);
return ret;
}
extern asmlinkage int sys_sched_getaffinity(pid_t pid, unsigned int len,
unsigned long *user_mask_ptr);
asmlinkage int sys32_sched_getaffinity(__kernel_pid_t32 pid, unsigned int len,
u32 *user_mask_ptr)
{
unsigned long kernel_mask;
mm_segment_t old_fs;
int ret;
old_fs = get_fs();
set_fs(KERNEL_DS);
ret = sys_sched_getaffinity(pid,
/* XXX Nice api... */
sizeof(kernel_mask),
&kernel_mask);
set_fs(old_fs);
if (ret == 0) {
if (put_user(kernel_mask, user_mask_ptr))
ret = -EFAULT;
}
return ret;
}
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;
}
extern asmlinkage long sys_personality(unsigned long);
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;
}
/* 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;
}
extern asmlinkage ssize_t sys_sendfile(int out_fd, int in_fd, off_t *offset, size_t count);
asmlinkage int sys32_sendfile(int out_fd, int in_fd, __kernel_off_t32 *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 sys_readahead(int fd, loff_t offset, size_t count);
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);
}