1 files changed, 1345 insertions, 0 deletions

diff --git a/arch/alpha/kernel/osf_sys.c b/arch/alpha/kernel/osf_sys.c
new file mode 100644
index 000000000000..b5d0fd2bb10a
--- /dev/null
+++ b/arch/alpha/kernel/osf_sys.c
@@ -0,0 +1,1345 @@
+/*
+ *  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 <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->d_inode->i_sb, &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;
+}
+
+asmlinkage long
+osf_shmat(int shmid, void __user *shmaddr, int shmflg)
+{
+        unsigned long raddr;
+        long err;
+
+        err = do_shmat(shmid, shmaddr, shmflg, &raddr);
+
+        /*
+         * This works because all user-level addresses are
+         * non-negative longs!
+         */
+        return err ? err : (long)raddr;
+}
+
+
+/*
+ * 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 >= sizeof(sysinfo_table)/sizeof(char *)) {
+                /* 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;
+extern int do_adjtimex(struct timex *);
+
+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(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;
+
+        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;
+                }
+        }
+
+        if (n < 0 || n > current->files->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 = tmp.tv_usec;
+        ticks = (ticks + (1000000 / HZ) - 1) / (1000000 / HZ);
+        ticks += tmp.tv_sec * HZ;
+
+        current->state = TASK_INTERRUPTIBLE;
+        ticks = schedule_timeout(ticks);
+
+        if (remain) {
+                tmp.tv_sec = ticks / HZ;
+                tmp.tv_usec = ticks % HZ;
+                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