aboutsummaryrefslogtreecommitdiff
path: root/arch/alpha/kernel/osf_sys.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/alpha/kernel/osf_sys.c')
-rw-r--r--arch/alpha/kernel/osf_sys.c1345
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