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Sourcecode: linux-2.6 version File versions

osf_sys.c

/*
 *  linux/arch/alpha/kernel/osf_sys.c
 *
 *  Copyright (C) 1995  Linus Torvalds
 */

/*
 * This file handles some of the stranger OSF/1 system call interfaces.
 * Some of the system calls expect a non-C calling standard, others have
 * special parameter blocks..
 */

#include <linux/errno.h>
#include <linux/sched.h>
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/smp.h>
#include <linux/smp_lock.h>
#include <linux/stddef.h>
#include <linux/syscalls.h>
#include <linux/unistd.h>
#include <linux/ptrace.h>
#include <linux/slab.h>
#include <linux/user.h>
#include <linux/a.out.h>
#include <linux/utsname.h>
#include <linux/time.h>
#include <linux/timex.h>
#include <linux/major.h>
#include <linux/stat.h>
#include <linux/mman.h>
#include <linux/shm.h>
#include <linux/poll.h>
#include <linux/file.h>
#include <linux/types.h>
#include <linux/ipc.h>
#include <linux/namei.h>
#include <linux/uio.h>
#include <linux/vfs.h>
#include <linux/rcupdate.h>

#include <asm/fpu.h>
#include <asm/io.h>
#include <asm/uaccess.h>
#include <asm/system.h>
#include <asm/sysinfo.h>
#include <asm/hwrpb.h>
#include <asm/processor.h>

extern int do_pipe(int *);

/*
 * Brk needs to return an error.  Still support Linux's brk(0) query idiom,
 * which OSF programs just shouldn't be doing.  We're still not quite
 * identical to OSF as we don't return 0 on success, but doing otherwise
 * would require changes to libc.  Hopefully this is good enough.
 */
asmlinkage unsigned long
osf_brk(unsigned long brk)
{
      unsigned long retval = sys_brk(brk);
      if (brk && brk != retval)
            retval = -ENOMEM;
      return retval;
}
 
/*
 * This is pure guess-work..
 */
asmlinkage int
osf_set_program_attributes(unsigned long text_start, unsigned long text_len,
                     unsigned long bss_start, unsigned long bss_len)
{
      struct mm_struct *mm;

      lock_kernel();
      mm = current->mm;
      mm->end_code = bss_start + bss_len;
      mm->brk = bss_start + bss_len;
#if 0
      printk("set_program_attributes(%lx %lx %lx %lx)\n",
            text_start, text_len, bss_start, bss_len);
#endif
      unlock_kernel();
      return 0;
}

/*
 * OSF/1 directory handling functions...
 *
 * The "getdents()" interface is much more sane: the "basep" stuff is
 * braindamage (it can't really handle filesystems where the directory
 * offset differences aren't the same as "d_reclen").
 */
#define NAME_OFFSET     offsetof (struct osf_dirent, d_name)
#define ROUND_UP(x)     (((x)+3) & ~3)

struct osf_dirent {
      unsigned int d_ino;
      unsigned short d_reclen;
      unsigned short d_namlen;
      char d_name[1];
};

struct osf_dirent_callback {
      struct osf_dirent __user *dirent;
      long __user *basep;
      unsigned int count;
      int error;
};

static int
osf_filldir(void *__buf, const char *name, int namlen, loff_t offset,
          ino_t ino, unsigned int d_type)
{
      struct osf_dirent __user *dirent;
      struct osf_dirent_callback *buf = (struct osf_dirent_callback *) __buf;
      unsigned int reclen = ROUND_UP(NAME_OFFSET + namlen + 1);

      buf->error = -EINVAL;   /* only used if we fail */
      if (reclen > buf->count)
            return -EINVAL;
      if (buf->basep) {
            if (put_user(offset, buf->basep))
                  return -EFAULT;
            buf->basep = NULL;
      }
      dirent = buf->dirent;
      put_user(ino, &dirent->d_ino);
      put_user(namlen, &dirent->d_namlen);
      put_user(reclen, &dirent->d_reclen);
      if (copy_to_user(dirent->d_name, name, namlen) ||
          put_user(0, dirent->d_name + namlen))
            return -EFAULT;
      dirent = (void __user *)dirent + reclen;
      buf->dirent = dirent;
      buf->count -= reclen;
      return 0;
}

asmlinkage int
osf_getdirentries(unsigned int fd, struct osf_dirent __user *dirent,
              unsigned int count, long __user *basep)
{
      int error;
      struct file *file;
      struct osf_dirent_callback buf;

      error = -EBADF;
      file = fget(fd);
      if (!file)
            goto out;

      buf.dirent = dirent;
      buf.basep = basep;
      buf.count = count;
      buf.error = 0;

      error = vfs_readdir(file, osf_filldir, &buf);
      if (error < 0)
            goto out_putf;

      error = buf.error;
      if (count != buf.count)
            error = count - buf.count;

 out_putf:
      fput(file);
 out:
      return error;
}

#undef ROUND_UP
#undef NAME_OFFSET

asmlinkage unsigned long
osf_mmap(unsigned long addr, unsigned long len, unsigned long prot,
       unsigned long flags, unsigned long fd, unsigned long off)
{
      struct file *file = NULL;
      unsigned long ret = -EBADF;

#if 0
      if (flags & (_MAP_HASSEMAPHORE | _MAP_INHERIT | _MAP_UNALIGNED))
            printk("%s: unimplemented OSF mmap flags %04lx\n", 
                  current->comm, flags);
#endif
      if (!(flags & MAP_ANONYMOUS)) {
            file = fget(fd);
            if (!file)
                  goto out;
      }
      flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
      down_write(&current->mm->mmap_sem);
      ret = do_mmap(file, addr, len, prot, flags, off);
      up_write(&current->mm->mmap_sem);
      if (file)
            fput(file);
 out:
      return ret;
}


/*
 * The OSF/1 statfs structure is much larger, but this should
 * match the beginning, at least.
 */
struct osf_statfs {
      short f_type;
      short f_flags;
      int f_fsize;
      int f_bsize;
      int f_blocks;
      int f_bfree;
      int f_bavail;
      int f_files;
      int f_ffree;
      __kernel_fsid_t f_fsid;
};

static int
linux_to_osf_statfs(struct kstatfs *linux_stat, struct osf_statfs __user *osf_stat,
                unsigned long bufsiz)
{
      struct osf_statfs tmp_stat;

      tmp_stat.f_type = linux_stat->f_type;
      tmp_stat.f_flags = 0;   /* mount flags */
      tmp_stat.f_fsize = linux_stat->f_frsize;
      tmp_stat.f_bsize = linux_stat->f_bsize;
      tmp_stat.f_blocks = linux_stat->f_blocks;
      tmp_stat.f_bfree = linux_stat->f_bfree;
      tmp_stat.f_bavail = linux_stat->f_bavail;
      tmp_stat.f_files = linux_stat->f_files;
      tmp_stat.f_ffree = linux_stat->f_ffree;
      tmp_stat.f_fsid = linux_stat->f_fsid;
      if (bufsiz > sizeof(tmp_stat))
            bufsiz = sizeof(tmp_stat);
      return copy_to_user(osf_stat, &tmp_stat, bufsiz) ? -EFAULT : 0;
}

static int
do_osf_statfs(struct dentry * dentry, struct osf_statfs __user *buffer,
            unsigned long bufsiz)
{
      struct kstatfs linux_stat;
      int error = vfs_statfs(dentry, &linux_stat);
      if (!error)
            error = linux_to_osf_statfs(&linux_stat, buffer, bufsiz);
      return error;     
}

asmlinkage int
osf_statfs(char __user *path, struct osf_statfs __user *buffer, unsigned long bufsiz)
{
      struct nameidata nd;
      int retval;

      retval = user_path_walk(path, &nd);
      if (!retval) {
            retval = do_osf_statfs(nd.dentry, buffer, bufsiz);
            path_release(&nd);
      }
      return retval;
}

asmlinkage int
osf_fstatfs(unsigned long fd, struct osf_statfs __user *buffer, unsigned long bufsiz)
{
      struct file *file;
      int retval;

      retval = -EBADF;
      file = fget(fd);
      if (file) {
            retval = do_osf_statfs(file->f_dentry, buffer, bufsiz);
            fput(file);
      }
      return retval;
}

/*
 * Uhh.. OSF/1 mount parameters aren't exactly obvious..
 *
 * Although to be frank, neither are the native Linux/i386 ones..
 */
struct ufs_args {
      char __user *devname;
      int flags;
      uid_t exroot;
};

struct cdfs_args {
      char __user *devname;
      int flags;
      uid_t exroot;

      /* This has lots more here, which Linux handles with the option block
         but I'm too lazy to do the translation into ASCII.  */
};

struct procfs_args {
      char __user *devname;
      int flags;
      uid_t exroot;
};

/*
 * We can't actually handle ufs yet, so we translate UFS mounts to
 * ext2fs mounts. I wouldn't mind a UFS filesystem, but the UFS
 * layout is so braindead it's a major headache doing it.
 *
 * Just how long ago was it written? OTOH our UFS driver may be still
 * unhappy with OSF UFS. [CHECKME]
 */
static int
osf_ufs_mount(char *dirname, struct ufs_args __user *args, int flags)
{
      int retval;
      struct cdfs_args tmp;
      char *devname;

      retval = -EFAULT;
      if (copy_from_user(&tmp, args, sizeof(tmp)))
            goto out;
      devname = getname(tmp.devname);
      retval = PTR_ERR(devname);
      if (IS_ERR(devname))
            goto out;
      retval = do_mount(devname, dirname, "ext2", flags, NULL);
      putname(devname);
 out:
      return retval;
}

static int
osf_cdfs_mount(char *dirname, struct cdfs_args __user *args, int flags)
{
      int retval;
      struct cdfs_args tmp;
      char *devname;

      retval = -EFAULT;
      if (copy_from_user(&tmp, args, sizeof(tmp)))
            goto out;
      devname = getname(tmp.devname);
      retval = PTR_ERR(devname);
      if (IS_ERR(devname))
            goto out;
      retval = do_mount(devname, dirname, "iso9660", flags, NULL);
      putname(devname);
 out:
      return retval;
}

static int
osf_procfs_mount(char *dirname, struct procfs_args __user *args, int flags)
{
      struct procfs_args tmp;

      if (copy_from_user(&tmp, args, sizeof(tmp)))
            return -EFAULT;

      return do_mount("", dirname, "proc", flags, NULL);
}

asmlinkage int
osf_mount(unsigned long typenr, char __user *path, int flag, void __user *data)
{
      int retval = -EINVAL;
      char *name;

      lock_kernel();

      name = getname(path);
      retval = PTR_ERR(name);
      if (IS_ERR(name))
            goto out;
      switch (typenr) {
      case 1:
            retval = osf_ufs_mount(name, data, flag);
            break;
      case 6:
            retval = osf_cdfs_mount(name, data, flag);
            break;
      case 9:
            retval = osf_procfs_mount(name, data, flag);
            break;
      default:
            printk("osf_mount(%ld, %x)\n", typenr, flag);
      }
      putname(name);
 out:
      unlock_kernel();
      return retval;
}

asmlinkage int
osf_utsname(char __user *name)
{
      int error;

      down_read(&uts_sem);
      error = -EFAULT;
      if (copy_to_user(name + 0, system_utsname.sysname, 32))
            goto out;
      if (copy_to_user(name + 32, system_utsname.nodename, 32))
            goto out;
      if (copy_to_user(name + 64, system_utsname.release, 32))
            goto out;
      if (copy_to_user(name + 96, system_utsname.version, 32))
            goto out;
      if (copy_to_user(name + 128, system_utsname.machine, 32))
            goto out;

      error = 0;
 out:
      up_read(&uts_sem);      
      return error;
}

asmlinkage unsigned long
sys_getpagesize(void)
{
      return PAGE_SIZE;
}

asmlinkage unsigned long
sys_getdtablesize(void)
{
      return NR_OPEN;
}

/*
 * For compatibility with OSF/1 only.  Use utsname(2) instead.
 */
asmlinkage int
osf_getdomainname(char __user *name, int namelen)
{
      unsigned len;
      int i;

      if (!access_ok(VERIFY_WRITE, name, namelen))
            return -EFAULT;

      len = namelen;
      if (namelen > 32)
            len = 32;

      down_read(&uts_sem);
      for (i = 0; i < len; ++i) {
            __put_user(system_utsname.domainname[i], name + i);
            if (system_utsname.domainname[i] == '\0')
                  break;
      }
      up_read(&uts_sem);

      return 0;
}

/*
 * The following stuff should move into a header file should it ever
 * be labeled "officially supported."  Right now, there is just enough
 * support to avoid applications (such as tar) printing error
 * messages.  The attributes are not really implemented.
 */

/*
 * Values for Property list entry flag
 */
#define PLE_PROPAGATE_ON_COPY       0x1   /* cp(1) will copy entry
                                       by default */
#define PLE_FLAG_MASK               0x1   /* Valid flag values */
#define PLE_FLAG_ALL                -1    /* All flag value */

struct proplistname_args {
      unsigned int pl_mask;
      unsigned int pl_numnames;
      char **pl_names;
};

union pl_args {
      struct setargs {
            char __user *path;
            long follow;
            long nbytes;
            char __user *buf;
      } set;
      struct fsetargs {
            long fd;
            long nbytes;
            char __user *buf;
      } fset;
      struct getargs {
            char __user *path;
            long follow;
            struct proplistname_args __user *name_args;
            long nbytes;
            char __user *buf;
            int __user *min_buf_size;
      } get;
      struct fgetargs {
            long fd;
            struct proplistname_args __user *name_args;
            long nbytes;
            char __user *buf;
            int __user *min_buf_size;
      } fget;
      struct delargs {
            char __user *path;
            long follow;
            struct proplistname_args __user *name_args;
      } del;
      struct fdelargs {
            long fd;
            struct proplistname_args __user *name_args;
      } fdel;
};

enum pl_code {
      PL_SET = 1, PL_FSET = 2,
      PL_GET = 3, PL_FGET = 4,
      PL_DEL = 5, PL_FDEL = 6
};

asmlinkage long
osf_proplist_syscall(enum pl_code code, union pl_args __user *args)
{
      long error;
      int __user *min_buf_size_ptr;

      lock_kernel();
      switch (code) {
      case PL_SET:
            if (get_user(error, &args->set.nbytes))
                  error = -EFAULT;
            break;
      case PL_FSET:
            if (get_user(error, &args->fset.nbytes))
                  error = -EFAULT;
            break;
      case PL_GET:
            error = get_user(min_buf_size_ptr, &args->get.min_buf_size);
            if (error)
                  break;
            error = put_user(0, min_buf_size_ptr);
            break;
      case PL_FGET:
            error = get_user(min_buf_size_ptr, &args->fget.min_buf_size);
            if (error)
                  break;
            error = put_user(0, min_buf_size_ptr);
            break;
      case PL_DEL:
      case PL_FDEL:
            error = 0;
            break;
      default:
            error = -EOPNOTSUPP;
            break;
      };
      unlock_kernel();
      return error;
}

asmlinkage int
osf_sigstack(struct sigstack __user *uss, struct sigstack __user *uoss)
{
      unsigned long usp = rdusp();
      unsigned long oss_sp = current->sas_ss_sp + current->sas_ss_size;
      unsigned long oss_os = on_sig_stack(usp);
      int error;

      if (uss) {
            void __user *ss_sp;

            error = -EFAULT;
            if (get_user(ss_sp, &uss->ss_sp))
                  goto out;

            /* If the current stack was set with sigaltstack, don't
               swap stacks while we are on it.  */
            error = -EPERM;
            if (current->sas_ss_sp && on_sig_stack(usp))
                  goto out;

            /* Since we don't know the extent of the stack, and we don't
               track onstack-ness, but rather calculate it, we must 
               presume a size.  Ho hum this interface is lossy.  */
            current->sas_ss_sp = (unsigned long)ss_sp - SIGSTKSZ;
            current->sas_ss_size = SIGSTKSZ;
      }

      if (uoss) {
            error = -EFAULT;
            if (! access_ok(VERIFY_WRITE, uoss, sizeof(*uoss))
                || __put_user(oss_sp, &uoss->ss_sp)
                || __put_user(oss_os, &uoss->ss_onstack))
                  goto out;
      }

      error = 0;
 out:
      return error;
}

asmlinkage long
osf_sysinfo(int command, char __user *buf, long count)
{
      static char * sysinfo_table[] = {
            system_utsname.sysname,
            system_utsname.nodename,
            system_utsname.release,
            system_utsname.version,
            system_utsname.machine,
            "alpha",    /* instruction set architecture */
            "dummy",    /* hardware serial number */
            "dummy",    /* hardware manufacturer */
            "dummy",    /* secure RPC domain */
      };
      unsigned long offset;
      char *res;
      long len, err = -EINVAL;

      offset = command-1;
      if (offset >= ARRAY_SIZE(sysinfo_table)) {
            /* Digital UNIX has a few unpublished interfaces here */
            printk("sysinfo(%d)", command);
            goto out;
      }

      down_read(&uts_sem);
      res = sysinfo_table[offset];
      len = strlen(res)+1;
      if (len > count)
            len = count;
      if (copy_to_user(buf, res, len))
            err = -EFAULT;
      else
            err = 0;
      up_read(&uts_sem);
 out:
      return err;
}

asmlinkage unsigned long
osf_getsysinfo(unsigned long op, void __user *buffer, unsigned long nbytes,
             int __user *start, void __user *arg)
{
      unsigned long w;
      struct percpu_struct *cpu;

      switch (op) {
      case GSI_IEEE_FP_CONTROL:
            /* Return current software fp control & status bits.  */
            /* Note that DU doesn't verify available space here.  */

            w = current_thread_info()->ieee_state & IEEE_SW_MASK;
            w = swcr_update_status(w, rdfpcr());
            if (put_user(w, (unsigned long __user *) buffer))
                  return -EFAULT;
            return 0;

      case GSI_IEEE_STATE_AT_SIGNAL:
            /*
             * Not sure anybody will ever use this weird stuff.  These
             * ops can be used (under OSF/1) to set the fpcr that should
             * be used when a signal handler starts executing.
             */
            break;

      case GSI_UACPROC:
            if (nbytes < sizeof(unsigned int))
                  return -EINVAL;
            w = (current_thread_info()->flags >> UAC_SHIFT) & UAC_BITMASK;
            if (put_user(w, (unsigned int __user *)buffer))
                  return -EFAULT;
            return 1;

      case GSI_PROC_TYPE:
            if (nbytes < sizeof(unsigned long))
                  return -EINVAL;
            cpu = (struct percpu_struct*)
              ((char*)hwrpb + hwrpb->processor_offset);
            w = cpu->type;
            if (put_user(w, (unsigned long  __user*)buffer))
                  return -EFAULT;
            return 1;

      case GSI_GET_HWRPB:
            if (nbytes < sizeof(*hwrpb))
                  return -EINVAL;
            if (copy_to_user(buffer, hwrpb, nbytes) != 0)
                  return -EFAULT;
            return 1;

      default:
            break;
      }

      return -EOPNOTSUPP;
}

asmlinkage unsigned long
osf_setsysinfo(unsigned long op, void __user *buffer, unsigned long nbytes,
             int __user *start, void __user *arg)
{
      switch (op) {
      case SSI_IEEE_FP_CONTROL: {
            unsigned long swcr, fpcr;
            unsigned int *state;

            /* 
             * Alpha Architecture Handbook 4.7.7.3:
             * To be fully IEEE compiant, we must track the current IEEE
             * exception state in software, because spurrious bits can be
             * set in the trap shadow of a software-complete insn.
             */

            if (get_user(swcr, (unsigned long __user *)buffer))
                  return -EFAULT;
            state = &current_thread_info()->ieee_state;

            /* Update softare trap enable bits.  */
            *state = (*state & ~IEEE_SW_MASK) | (swcr & IEEE_SW_MASK);

            /* Update the real fpcr.  */
            fpcr = rdfpcr() & FPCR_DYN_MASK;
            fpcr |= ieee_swcr_to_fpcr(swcr);
            wrfpcr(fpcr);

            return 0;
      }

      case SSI_IEEE_RAISE_EXCEPTION: {
            unsigned long exc, swcr, fpcr, fex;
            unsigned int *state;

            if (get_user(exc, (unsigned long __user *)buffer))
                  return -EFAULT;
            state = &current_thread_info()->ieee_state;
            exc &= IEEE_STATUS_MASK;

            /* Update softare trap enable bits.  */
            swcr = (*state & IEEE_SW_MASK) | exc;
            *state |= exc;

            /* Update the real fpcr.  */
            fpcr = rdfpcr();
            fpcr |= ieee_swcr_to_fpcr(swcr);
            wrfpcr(fpcr);

            /* If any exceptions set by this call, and are unmasked,
               send a signal.  Old exceptions are not signaled.  */
            fex = (exc >> IEEE_STATUS_TO_EXCSUM_SHIFT) & swcr;
            if (fex) {
                  siginfo_t info;
                  int si_code = 0;

                  if (fex & IEEE_TRAP_ENABLE_DNO) si_code = FPE_FLTUND;
                  if (fex & IEEE_TRAP_ENABLE_INE) si_code = FPE_FLTRES;
                  if (fex & IEEE_TRAP_ENABLE_UNF) si_code = FPE_FLTUND;
                  if (fex & IEEE_TRAP_ENABLE_OVF) si_code = FPE_FLTOVF;
                  if (fex & IEEE_TRAP_ENABLE_DZE) si_code = FPE_FLTDIV;
                  if (fex & IEEE_TRAP_ENABLE_INV) si_code = FPE_FLTINV;

                  info.si_signo = SIGFPE;
                  info.si_errno = 0;
                  info.si_code = si_code;
                  info.si_addr = NULL;  /* FIXME */
                  send_sig_info(SIGFPE, &info, current);
            }
            return 0;
      }

      case SSI_IEEE_STATE_AT_SIGNAL:
      case SSI_IEEE_IGNORE_STATE_AT_SIGNAL:
            /*
             * Not sure anybody will ever use this weird stuff.  These
             * ops can be used (under OSF/1) to set the fpcr that should
             * be used when a signal handler starts executing.
             */
            break;

      case SSI_NVPAIRS: {
            unsigned long v, w, i;
            unsigned int old, new;
            
            for (i = 0; i < nbytes; ++i) {

                  if (get_user(v, 2*i + (unsigned int __user *)buffer))
                        return -EFAULT;
                  if (get_user(w, 2*i + 1 + (unsigned int __user *)buffer))
                        return -EFAULT;
                  switch (v) {
                  case SSIN_UACPROC:
                  again:
                        old = current_thread_info()->flags;
                        new = old & ~(UAC_BITMASK << UAC_SHIFT);
                        new = new | (w & UAC_BITMASK) << UAC_SHIFT;
                        if (cmpxchg(&current_thread_info()->flags,
                                  old, new) != old)
                              goto again;
                        break;
 
                  default:
                        return -EOPNOTSUPP;
                  }
            }
            return 0;
      }
 
      default:
            break;
      }

      return -EOPNOTSUPP;
}

/* Translations due to the fact that OSF's time_t is an int.  Which
   affects all sorts of things, like timeval and itimerval.  */

extern struct timezone sys_tz;

struct timeval32
{
    int tv_sec, tv_usec;
};

struct itimerval32
{
    struct timeval32 it_interval;
    struct timeval32 it_value;
};

static inline long
get_tv32(struct timeval *o, struct timeval32 __user *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 timeval32 __user *o, struct timeval *i)
{
      return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) ||
            (__put_user(i->tv_sec, &o->tv_sec) |
             __put_user(i->tv_usec, &o->tv_usec)));
}

static inline long
get_it32(struct itimerval *o, struct itimerval32 __user *i)
{
      return (!access_ok(VERIFY_READ, i, sizeof(*i)) ||
            (__get_user(o->it_interval.tv_sec, &i->it_interval.tv_sec) |
             __get_user(o->it_interval.tv_usec, &i->it_interval.tv_usec) |
             __get_user(o->it_value.tv_sec, &i->it_value.tv_sec) |
             __get_user(o->it_value.tv_usec, &i->it_value.tv_usec)));
}

static inline long
put_it32(struct itimerval32 __user *o, struct itimerval *i)
{
      return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) ||
            (__put_user(i->it_interval.tv_sec, &o->it_interval.tv_sec) |
             __put_user(i->it_interval.tv_usec, &o->it_interval.tv_usec) |
             __put_user(i->it_value.tv_sec, &o->it_value.tv_sec) |
             __put_user(i->it_value.tv_usec, &o->it_value.tv_usec)));
}

static inline void
jiffies_to_timeval32(unsigned long jiffies, struct timeval32 *value)
{
      value->tv_usec = (jiffies % HZ) * (1000000L / HZ);
      value->tv_sec = jiffies / HZ;
}

asmlinkage int
osf_gettimeofday(struct timeval32 __user *tv, struct timezone __user *tz)
{
      if (tv) {
            struct timeval ktv;
            do_gettimeofday(&ktv);
            if (put_tv32(tv, &ktv))
                  return -EFAULT;
      }
      if (tz) {
            if (copy_to_user(tz, &sys_tz, sizeof(sys_tz)))
                  return -EFAULT;
      }
      return 0;
}

asmlinkage int
osf_settimeofday(struct timeval32 __user *tv, struct timezone __user *tz)
{
      struct timespec kts;
      struct timezone ktz;

      if (tv) {
            if (get_tv32((struct timeval *)&kts, tv))
                  return -EFAULT;
      }
      if (tz) {
            if (copy_from_user(&ktz, tz, sizeof(*tz)))
                  return -EFAULT;
      }

      kts.tv_nsec *= 1000;

      return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL);
}

asmlinkage int
osf_getitimer(int which, struct itimerval32 __user *it)
{
      struct itimerval kit;
      int error;

      error = do_getitimer(which, &kit);
      if (!error && put_it32(it, &kit))
            error = -EFAULT;

      return error;
}

asmlinkage int
osf_setitimer(int which, struct itimerval32 __user *in, struct itimerval32 __user *out)
{
      struct itimerval kin, kout;
      int error;

      if (in) {
            if (get_it32(&kin, in))
                  return -EFAULT;
      } else
            memset(&kin, 0, sizeof(kin));

      error = do_setitimer(which, &kin, out ? &kout : NULL);
      if (error || !out)
            return error;

      if (put_it32(out, &kout))
            return -EFAULT;

      return 0;

}

asmlinkage int
osf_utimes(char __user *filename, struct timeval32 __user *tvs)
{
      struct timeval ktvs[2];

      if (tvs) {
            if (get_tv32(&ktvs[0], &tvs[0]) ||
                get_tv32(&ktvs[1], &tvs[1]))
                  return -EFAULT;
      }

      return do_utimes(AT_FDCWD, filename, tvs ? ktvs : NULL);
}

#define MAX_SELECT_SECONDS \
      ((unsigned long) (MAX_SCHEDULE_TIMEOUT / HZ)-1)

asmlinkage int
osf_select(int n, fd_set __user *inp, fd_set __user *outp, fd_set __user *exp,
         struct timeval32 __user *tvp)
{
      fd_set_bits fds;
      char *bits;
      size_t size;
      long timeout;
      int ret = -EINVAL;
      struct fdtable *fdt;
      int max_fdset;

      timeout = MAX_SCHEDULE_TIMEOUT;
      if (tvp) {
            time_t sec, usec;

            if (!access_ok(VERIFY_READ, tvp, sizeof(*tvp))
                || __get_user(sec, &tvp->tv_sec)
                || __get_user(usec, &tvp->tv_usec)) {
                  ret = -EFAULT;
                  goto out_nofds;
            }

            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;
            }
      }

      rcu_read_lock();
      fdt = files_fdtable(current->files);
      max_fdset = fdt->max_fdset;
      rcu_read_unlock();
      if (n < 0 || n > max_fdset)
            goto out_nofds;

      /*
       * 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_bits, fds.in)) ||
          (ret = get_fd_set(n, outp->fds_bits, fds.out)) ||
          (ret = get_fd_set(n, exp->fds_bits, 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);

      /* OSF does not copy back the remaining time.  */

      if (ret < 0)
            goto out;
      if (!ret) {
            ret = -ERESTARTNOHAND;
            if (signal_pending(current))
                  goto out;
            ret = 0;
      }

      if (set_fd_set(n, inp->fds_bits, fds.res_in) ||
          set_fd_set(n, outp->fds_bits, fds.res_out) ||
          set_fd_set(n, exp->fds_bits, fds.res_ex))
            ret = -EFAULT;

 out:
      kfree(bits);
 out_nofds:
      return ret;
}

struct rusage32 {
      struct timeval32 ru_utime;    /* user time used */
      struct timeval32 ru_stime;    /* system time used */
      long  ru_maxrss;        /* maximum resident set size */
      long  ru_ixrss;         /* integral shared memory size */
      long  ru_idrss;         /* integral unshared data size */
      long  ru_isrss;         /* integral unshared stack size */
      long  ru_minflt;        /* page reclaims */
      long  ru_majflt;        /* page faults */
      long  ru_nswap;         /* swaps */
      long  ru_inblock;       /* block input operations */
      long  ru_oublock;       /* block output operations */
      long  ru_msgsnd;        /* messages sent */
      long  ru_msgrcv;        /* messages received */
      long  ru_nsignals;            /* signals received */
      long  ru_nvcsw;         /* voluntary context switches */
      long  ru_nivcsw;        /* involuntary " */
};

asmlinkage int
osf_getrusage(int who, struct rusage32 __user *ru)
{
      struct rusage32 r;

      if (who != RUSAGE_SELF && who != RUSAGE_CHILDREN)
            return -EINVAL;

      memset(&r, 0, sizeof(r));
      switch (who) {
      case RUSAGE_SELF:
            jiffies_to_timeval32(current->utime, &r.ru_utime);
            jiffies_to_timeval32(current->stime, &r.ru_stime);
            r.ru_minflt = current->min_flt;
            r.ru_majflt = current->maj_flt;
            break;
      case RUSAGE_CHILDREN:
            jiffies_to_timeval32(current->signal->cutime, &r.ru_utime);
            jiffies_to_timeval32(current->signal->cstime, &r.ru_stime);
            r.ru_minflt = current->signal->cmin_flt;
            r.ru_majflt = current->signal->cmaj_flt;
            break;
      }

      return copy_to_user(ru, &r, sizeof(r)) ? -EFAULT : 0;
}

asmlinkage long
osf_wait4(pid_t pid, int __user *ustatus, int options,
        struct rusage32 __user *ur)
{
      struct rusage r;
      long ret, err;
      mm_segment_t old_fs;

      if (!ur)
            return sys_wait4(pid, ustatus, options, NULL);

      old_fs = get_fs();
            
      set_fs (KERNEL_DS);
      ret = sys_wait4(pid, ustatus, options, (struct rusage __user *) &r);
      set_fs (old_fs);

      if (!access_ok(VERIFY_WRITE, ur, sizeof(*ur)))
            return -EFAULT;

      err = 0;
      err |= __put_user(r.ru_utime.tv_sec, &ur->ru_utime.tv_sec);
      err |= __put_user(r.ru_utime.tv_usec, &ur->ru_utime.tv_usec);
      err |= __put_user(r.ru_stime.tv_sec, &ur->ru_stime.tv_sec);
      err |= __put_user(r.ru_stime.tv_usec, &ur->ru_stime.tv_usec);
      err |= __put_user(r.ru_maxrss, &ur->ru_maxrss);
      err |= __put_user(r.ru_ixrss, &ur->ru_ixrss);
      err |= __put_user(r.ru_idrss, &ur->ru_idrss);
      err |= __put_user(r.ru_isrss, &ur->ru_isrss);
      err |= __put_user(r.ru_minflt, &ur->ru_minflt);
      err |= __put_user(r.ru_majflt, &ur->ru_majflt);
      err |= __put_user(r.ru_nswap, &ur->ru_nswap);
      err |= __put_user(r.ru_inblock, &ur->ru_inblock);
      err |= __put_user(r.ru_oublock, &ur->ru_oublock);
      err |= __put_user(r.ru_msgsnd, &ur->ru_msgsnd);
      err |= __put_user(r.ru_msgrcv, &ur->ru_msgrcv);
      err |= __put_user(r.ru_nsignals, &ur->ru_nsignals);
      err |= __put_user(r.ru_nvcsw, &ur->ru_nvcsw);
      err |= __put_user(r.ru_nivcsw, &ur->ru_nivcsw);

      return err ? err : ret;
}

/*
 * I don't know what the parameters are: the first one
 * seems to be a timeval pointer, and I suspect the second
 * one is the time remaining.. Ho humm.. No documentation.
 */
asmlinkage int
osf_usleep_thread(struct timeval32 __user *sleep, struct timeval32 __user *remain)
{
      struct timeval tmp;
      unsigned long ticks;

      if (get_tv32(&tmp, sleep))
            goto fault;

      ticks = timeval_to_jiffies(&tmp);

      ticks = schedule_timeout_interruptible(ticks);

      if (remain) {
            jiffies_to_timeval(ticks, &tmp);
            if (put_tv32(remain, &tmp))
                  goto fault;
      }
      
      return 0;
 fault:
      return -EFAULT;
}


struct timex32 {
      unsigned int modes;     /* mode selector */
      long offset;            /* time offset (usec) */
      long freq;        /* frequency offset (scaled ppm) */
      long maxerror;          /* maximum error (usec) */
      long esterror;          /* estimated error (usec) */
      int status;       /* clock command/status */
      long constant;          /* pll time constant */
      long precision;         /* clock precision (usec) (read only) */
      long tolerance;         /* clock frequency tolerance (ppm)
                         * (read only)
                         */
      struct timeval32 time;  /* (read only) */
      long tick;        /* (modified) usecs between clock ticks */

      long ppsfreq;           /* pps frequency (scaled ppm) (ro) */
      long jitter;            /* pps jitter (us) (ro) */
      int shift;              /* interval duration (s) (shift) (ro) */
      long stabil;            /* pps stability (scaled ppm) (ro) */
      long jitcnt;            /* jitter limit exceeded (ro) */
      long calcnt;            /* calibration intervals (ro) */
      long errcnt;            /* calibration errors (ro) */
      long stbcnt;            /* stability limit exceeded (ro) */

      int  :32; int  :32; int  :32; int  :32;
      int  :32; int  :32; int  :32; int  :32;
      int  :32; int  :32; int  :32; int  :32;
};

asmlinkage int
sys_old_adjtimex(struct timex32 __user *txc_p)
{
        struct timex txc;
      int ret;

      /* copy relevant bits of struct timex. */
      if (copy_from_user(&txc, txc_p, offsetof(struct timex32, time)) ||
          copy_from_user(&txc.tick, &txc_p->tick, sizeof(struct timex32) - 
                     offsetof(struct timex32, time)))
        return -EFAULT;

      ret = do_adjtimex(&txc);      
      if (ret < 0)
        return ret;
      
      /* copy back to timex32 */
      if (copy_to_user(txc_p, &txc, offsetof(struct timex32, time)) ||
          (copy_to_user(&txc_p->tick, &txc.tick, sizeof(struct timex32) - 
                    offsetof(struct timex32, tick))) ||
          (put_tv32(&txc_p->time, &txc.time)))
        return -EFAULT;

      return ret;
}

/* Get an address range which is currently unmapped.  Similar to the
   generic version except that we know how to honor ADDR_LIMIT_32BIT.  */

static unsigned long
arch_get_unmapped_area_1(unsigned long addr, unsigned long len,
                     unsigned long limit)
{
      struct vm_area_struct *vma = find_vma(current->mm, addr);

      while (1) {
            /* At this point:  (!vma || addr < vma->vm_end). */
            if (limit - len < addr)
                  return -ENOMEM;
            if (!vma || addr + len <= vma->vm_start)
                  return addr;
            addr = vma->vm_end;
            vma = vma->vm_next;
      }
}

unsigned long
arch_get_unmapped_area(struct file *filp, unsigned long addr,
                   unsigned long len, unsigned long pgoff,
                   unsigned long flags)
{
      unsigned long limit;

      /* "32 bit" actually means 31 bit, since pointers sign extend.  */
      if (current->personality & ADDR_LIMIT_32BIT)
            limit = 0x80000000;
      else
            limit = TASK_SIZE;

      if (len > limit)
            return -ENOMEM;

      /* First, see if the given suggestion fits.

         The OSF/1 loader (/sbin/loader) relies on us returning an
         address larger than the requested if one exists, which is
         a terribly broken way to program.

         That said, I can see the use in being able to suggest not
         merely specific addresses, but regions of memory -- perhaps
         this feature should be incorporated into all ports?  */

      if (addr) {
            addr = arch_get_unmapped_area_1 (PAGE_ALIGN(addr), len, limit);
            if (addr != (unsigned long) -ENOMEM)
                  return addr;
      }

      /* Next, try allocating at TASK_UNMAPPED_BASE.  */
      addr = arch_get_unmapped_area_1 (PAGE_ALIGN(TASK_UNMAPPED_BASE),
                               len, limit);
      if (addr != (unsigned long) -ENOMEM)
            return addr;

      /* Finally, try allocating in low memory.  */
      addr = arch_get_unmapped_area_1 (PAGE_SIZE, len, limit);

      return addr;
}

#ifdef CONFIG_OSF4_COMPAT

/* Clear top 32 bits of iov_len in the user's buffer for
   compatibility with old versions of OSF/1 where iov_len
   was defined as int. */
static int
osf_fix_iov_len(const struct iovec __user *iov, unsigned long count)
{
      unsigned long i;

      for (i = 0 ; i < count ; i++) {
            int __user *iov_len_high = (int __user *)&iov[i].iov_len + 1;

            if (put_user(0, iov_len_high))
                  return -EFAULT;
      }
      return 0;
}

asmlinkage ssize_t
osf_readv(unsigned long fd, const struct iovec __user * vector, unsigned long count)
{
      if (unlikely(personality(current->personality) == PER_OSF4))
            if (osf_fix_iov_len(vector, count))
                  return -EFAULT;
      return sys_readv(fd, vector, count);
}

asmlinkage ssize_t
osf_writev(unsigned long fd, const struct iovec __user * vector, unsigned long count)
{
      if (unlikely(personality(current->personality) == PER_OSF4))
            if (osf_fix_iov_len(vector, count))
                  return -EFAULT;
      return sys_writev(fd, vector, count);
}

#endif

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