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-rw-r--r--arch/alpha/kernel/osf_sys.c1369
1 files changed, 1369 insertions, 0 deletions
diff --git a/arch/alpha/kernel/osf_sys.c b/arch/alpha/kernel/osf_sys.c
new file mode 100644
index 000000000..d5367a1c6
--- /dev/null
+++ b/arch/alpha/kernel/osf_sys.c
@@ -0,0 +1,1369 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * 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/signal.h>
+#include <linux/sched/mm.h>
+#include <linux/sched/task_stack.h>
+#include <linux/sched/cputime.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/smp.h>
+#include <linux/stddef.h>
+#include <linux/syscalls.h>
+#include <linux/unistd.h>
+#include <linux/ptrace.h>
+#include <linux/user.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 <linux/slab.h>
+
+#include <asm/fpu.h>
+#include <asm/io.h>
+#include <linux/uaccess.h>
+#include <asm/sysinfo.h>
+#include <asm/thread_info.h>
+#include <asm/hwrpb.h>
+#include <asm/processor.h>
+
+/*
+ * 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.
+ */
+SYSCALL_DEFINE1(osf_brk, unsigned long, brk)
+{
+ unsigned long retval = sys_brk(brk);
+ if (brk && brk != retval)
+ retval = -ENOMEM;
+ return retval;
+}
+
+/*
+ * This is pure guess-work..
+ */
+SYSCALL_DEFINE4(osf_set_program_attributes, unsigned long, text_start,
+ unsigned long, text_len, unsigned long, bss_start,
+ unsigned long, bss_len)
+{
+ struct mm_struct *mm;
+
+ mm = current->mm;
+ mm->end_code = bss_start + bss_len;
+ mm->start_brk = 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
+ 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)
+
+struct osf_dirent {
+ unsigned int d_ino;
+ unsigned short d_reclen;
+ unsigned short d_namlen;
+ char d_name[1];
+};
+
+struct osf_dirent_callback {
+ struct dir_context ctx;
+ struct osf_dirent __user *dirent;
+ long __user *basep;
+ unsigned int count;
+ int error;
+};
+
+static int
+osf_filldir(struct dir_context *ctx, const char *name, int namlen,
+ loff_t offset, u64 ino, unsigned int d_type)
+{
+ struct osf_dirent __user *dirent;
+ struct osf_dirent_callback *buf =
+ container_of(ctx, struct osf_dirent_callback, ctx);
+ unsigned int reclen = ALIGN(NAME_OFFSET + namlen + 1, sizeof(u32));
+ unsigned int d_ino;
+
+ buf->error = -EINVAL; /* only used if we fail */
+ if (reclen > buf->count)
+ return -EINVAL;
+ d_ino = ino;
+ if (sizeof(d_ino) < sizeof(ino) && d_ino != ino) {
+ buf->error = -EOVERFLOW;
+ return -EOVERFLOW;
+ }
+ if (buf->basep) {
+ if (put_user(offset, buf->basep))
+ goto Efault;
+ buf->basep = NULL;
+ }
+ dirent = buf->dirent;
+ if (put_user(d_ino, &dirent->d_ino) ||
+ put_user(namlen, &dirent->d_namlen) ||
+ put_user(reclen, &dirent->d_reclen) ||
+ copy_to_user(dirent->d_name, name, namlen) ||
+ put_user(0, dirent->d_name + namlen))
+ goto Efault;
+ dirent = (void __user *)dirent + reclen;
+ buf->dirent = dirent;
+ buf->count -= reclen;
+ return 0;
+Efault:
+ buf->error = -EFAULT;
+ return -EFAULT;
+}
+
+SYSCALL_DEFINE4(osf_getdirentries, unsigned int, fd,
+ struct osf_dirent __user *, dirent, unsigned int, count,
+ long __user *, basep)
+{
+ int error;
+ struct fd arg = fdget_pos(fd);
+ struct osf_dirent_callback buf = {
+ .ctx.actor = osf_filldir,
+ .dirent = dirent,
+ .basep = basep,
+ .count = count
+ };
+
+ if (!arg.file)
+ return -EBADF;
+
+ error = iterate_dir(arg.file, &buf.ctx);
+ if (error >= 0)
+ error = buf.error;
+ if (count != buf.count)
+ error = count - buf.count;
+
+ fdput_pos(arg);
+ return error;
+}
+
+#undef NAME_OFFSET
+
+SYSCALL_DEFINE6(osf_mmap, unsigned long, addr, unsigned long, len,
+ unsigned long, prot, unsigned long, flags, unsigned long, fd,
+ unsigned long, off)
+{
+ unsigned long ret = -EINVAL;
+
+#if 0
+ if (flags & (_MAP_HASSEMAPHORE | _MAP_INHERIT | _MAP_UNALIGNED))
+ printk("%s: unimplemented OSF mmap flags %04lx\n",
+ current->comm, flags);
+#endif
+ if ((off + PAGE_ALIGN(len)) < off)
+ goto out;
+ if (off & ~PAGE_MASK)
+ goto out;
+ ret = ksys_mmap_pgoff(addr, len, prot, flags, fd, off >> PAGE_SHIFT);
+ out:
+ return ret;
+}
+
+struct osf_stat {
+ int st_dev;
+ int st_pad1;
+ unsigned st_mode;
+ unsigned short st_nlink;
+ short st_nlink_reserved;
+ unsigned st_uid;
+ unsigned st_gid;
+ int st_rdev;
+ int st_ldev;
+ long st_size;
+ int st_pad2;
+ int st_uatime;
+ int st_pad3;
+ int st_umtime;
+ int st_pad4;
+ int st_uctime;
+ int st_pad5;
+ int st_pad6;
+ unsigned st_flags;
+ unsigned st_gen;
+ long st_spare[4];
+ unsigned st_ino;
+ int st_ino_reserved;
+ int st_atime;
+ int st_atime_reserved;
+ int st_mtime;
+ int st_mtime_reserved;
+ int st_ctime;
+ int st_ctime_reserved;
+ long st_blksize;
+ long st_blocks;
+};
+
+/*
+ * 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;
+};
+
+struct osf_statfs64 {
+ short f_type;
+ short f_flags;
+ int f_pad1;
+ int f_pad2;
+ int f_pad3;
+ int f_pad4;
+ int f_pad5;
+ int f_pad6;
+ int f_pad7;
+ __kernel_fsid_t f_fsid;
+ u_short f_namemax;
+ short f_reserved1;
+ int f_spare[8];
+ char f_pad8[90];
+ char f_pad9[90];
+ long mount_info[10];
+ u_long f_flags2;
+ long f_spare2[14];
+ long f_fsize;
+ long f_bsize;
+ long f_blocks;
+ long f_bfree;
+ long f_bavail;
+ long f_files;
+ long f_ffree;
+};
+
+static int
+linux_to_osf_stat(struct kstat *lstat, struct osf_stat __user *osf_stat)
+{
+ struct osf_stat tmp = { 0 };
+
+ tmp.st_dev = lstat->dev;
+ tmp.st_mode = lstat->mode;
+ tmp.st_nlink = lstat->nlink;
+ tmp.st_uid = from_kuid_munged(current_user_ns(), lstat->uid);
+ tmp.st_gid = from_kgid_munged(current_user_ns(), lstat->gid);
+ tmp.st_rdev = lstat->rdev;
+ tmp.st_ldev = lstat->rdev;
+ tmp.st_size = lstat->size;
+ tmp.st_uatime = lstat->atime.tv_nsec / 1000;
+ tmp.st_umtime = lstat->mtime.tv_nsec / 1000;
+ tmp.st_uctime = lstat->ctime.tv_nsec / 1000;
+ tmp.st_ino = lstat->ino;
+ tmp.st_atime = lstat->atime.tv_sec;
+ tmp.st_mtime = lstat->mtime.tv_sec;
+ tmp.st_ctime = lstat->ctime.tv_sec;
+ tmp.st_blksize = lstat->blksize;
+ tmp.st_blocks = lstat->blocks;
+
+ return copy_to_user(osf_stat, &tmp, sizeof(tmp)) ? -EFAULT : 0;
+}
+
+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
+linux_to_osf_statfs64(struct kstatfs *linux_stat, struct osf_statfs64 __user *osf_stat,
+ unsigned long bufsiz)
+{
+ struct osf_statfs64 tmp_stat = { 0 };
+
+ tmp_stat.f_type = linux_stat->f_type;
+ 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;
+}
+
+SYSCALL_DEFINE3(osf_statfs, const char __user *, pathname,
+ struct osf_statfs __user *, buffer, unsigned long, bufsiz)
+{
+ struct kstatfs linux_stat;
+ int error = user_statfs(pathname, &linux_stat);
+ if (!error)
+ error = linux_to_osf_statfs(&linux_stat, buffer, bufsiz);
+ return error;
+}
+
+SYSCALL_DEFINE2(osf_stat, char __user *, name, struct osf_stat __user *, buf)
+{
+ struct kstat stat;
+ int error;
+
+ error = vfs_stat(name, &stat);
+ if (error)
+ return error;
+
+ return linux_to_osf_stat(&stat, buf);
+}
+
+SYSCALL_DEFINE2(osf_lstat, char __user *, name, struct osf_stat __user *, buf)
+{
+ struct kstat stat;
+ int error;
+
+ error = vfs_lstat(name, &stat);
+ if (error)
+ return error;
+
+ return linux_to_osf_stat(&stat, buf);
+}
+
+SYSCALL_DEFINE2(osf_fstat, int, fd, struct osf_stat __user *, buf)
+{
+ struct kstat stat;
+ int error;
+
+ error = vfs_fstat(fd, &stat);
+ if (error)
+ return error;
+
+ return linux_to_osf_stat(&stat, buf);
+}
+
+SYSCALL_DEFINE3(osf_fstatfs, unsigned long, fd,
+ struct osf_statfs __user *, buffer, unsigned long, bufsiz)
+{
+ struct kstatfs linux_stat;
+ int error = fd_statfs(fd, &linux_stat);
+ if (!error)
+ error = linux_to_osf_statfs(&linux_stat, buffer, bufsiz);
+ return error;
+}
+
+SYSCALL_DEFINE3(osf_statfs64, char __user *, pathname,
+ struct osf_statfs64 __user *, buffer, unsigned long, bufsiz)
+{
+ struct kstatfs linux_stat;
+ int error = user_statfs(pathname, &linux_stat);
+ if (!error)
+ error = linux_to_osf_statfs64(&linux_stat, buffer, bufsiz);
+ return error;
+}
+
+SYSCALL_DEFINE3(osf_fstatfs64, unsigned long, fd,
+ struct osf_statfs64 __user *, buffer, unsigned long, bufsiz)
+{
+ struct kstatfs linux_stat;
+ int error = fd_statfs(fd, &linux_stat);
+ if (!error)
+ error = linux_to_osf_statfs64(&linux_stat, buffer, bufsiz);
+ return error;
+}
+
+/*
+ * 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(const char __user *dirname,
+ struct ufs_args __user *args, int flags)
+{
+ int retval;
+ struct cdfs_args tmp;
+ struct filename *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->name, dirname, "ext2", flags, NULL);
+ putname(devname);
+ out:
+ return retval;
+}
+
+static int
+osf_cdfs_mount(const char __user *dirname,
+ struct cdfs_args __user *args, int flags)
+{
+ int retval;
+ struct cdfs_args tmp;
+ struct filename *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->name, dirname, "iso9660", flags, NULL);
+ putname(devname);
+ out:
+ return retval;
+}
+
+static int
+osf_procfs_mount(const char __user *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);
+}
+
+SYSCALL_DEFINE4(osf_mount, unsigned long, typenr, const char __user *, path,
+ int, flag, void __user *, data)
+{
+ int retval;
+
+ switch (typenr) {
+ case 1:
+ retval = osf_ufs_mount(path, data, flag);
+ break;
+ case 6:
+ retval = osf_cdfs_mount(path, data, flag);
+ break;
+ case 9:
+ retval = osf_procfs_mount(path, data, flag);
+ break;
+ default:
+ retval = -EINVAL;
+ printk("osf_mount(%ld, %x)\n", typenr, flag);
+ }
+
+ return retval;
+}
+
+SYSCALL_DEFINE1(osf_utsname, char __user *, name)
+{
+ char tmp[5 * 32];
+
+ down_read(&uts_sem);
+ memcpy(tmp + 0 * 32, utsname()->sysname, 32);
+ memcpy(tmp + 1 * 32, utsname()->nodename, 32);
+ memcpy(tmp + 2 * 32, utsname()->release, 32);
+ memcpy(tmp + 3 * 32, utsname()->version, 32);
+ memcpy(tmp + 4 * 32, utsname()->machine, 32);
+ up_read(&uts_sem);
+
+ if (copy_to_user(name, tmp, sizeof(tmp)))
+ return -EFAULT;
+ return 0;
+}
+
+SYSCALL_DEFINE0(getpagesize)
+{
+ return PAGE_SIZE;
+}
+
+SYSCALL_DEFINE0(getdtablesize)
+{
+ return sysctl_nr_open;
+}
+
+/*
+ * For compatibility with OSF/1 only. Use utsname(2) instead.
+ */
+SYSCALL_DEFINE2(osf_getdomainname, char __user *, name, int, namelen)
+{
+ int len;
+ char *kname;
+ char tmp[32];
+
+ if (namelen < 0 || namelen > 32)
+ namelen = 32;
+
+ down_read(&uts_sem);
+ kname = utsname()->domainname;
+ len = strnlen(kname, namelen);
+ len = min(len + 1, namelen);
+ memcpy(tmp, kname, len);
+ up_read(&uts_sem);
+
+ if (copy_to_user(name, tmp, len))
+ return -EFAULT;
+ 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
+};
+
+SYSCALL_DEFINE2(osf_proplist_syscall, enum pl_code, code,
+ union pl_args __user *, args)
+{
+ long error;
+ int __user *min_buf_size_ptr;
+
+ 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;
+ }
+ return error;
+}
+
+SYSCALL_DEFINE2(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 (put_user(oss_sp, &uoss->ss_sp) ||
+ put_user(oss_os, &uoss->ss_onstack))
+ goto out;
+ }
+
+ error = 0;
+ out:
+ return error;
+}
+
+SYSCALL_DEFINE3(osf_sysinfo, int, command, char __user *, buf, long, count)
+{
+ const char *sysinfo_table[] = {
+ utsname()->sysname,
+ utsname()->nodename,
+ utsname()->release,
+ utsname()->version,
+ utsname()->machine,
+ "alpha", /* instruction set architecture */
+ "dummy", /* hardware serial number */
+ "dummy", /* hardware manufacturer */
+ "dummy", /* secure RPC domain */
+ };
+ unsigned long offset;
+ const char *res;
+ long len;
+ char tmp[__NEW_UTS_LEN + 1];
+
+ offset = command-1;
+ if (offset >= ARRAY_SIZE(sysinfo_table)) {
+ /* Digital UNIX has a few unpublished interfaces here */
+ printk("sysinfo(%d)", command);
+ return -EINVAL;
+ }
+
+ down_read(&uts_sem);
+ res = sysinfo_table[offset];
+ len = strlen(res)+1;
+ if ((unsigned long)len > (unsigned long)count)
+ len = count;
+ memcpy(tmp, res, len);
+ up_read(&uts_sem);
+ if (copy_to_user(buf, tmp, len))
+ return -EFAULT;
+ return 0;
+}
+
+SYSCALL_DEFINE5(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()->status & 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;
+}
+
+SYSCALL_DEFINE5(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 spurious 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) {
+ int si_code = FPE_FLTUNK;
+
+ 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;
+
+ send_sig_fault(SIGFPE, si_code,
+ (void __user *)NULL, /* FIXME */
+ 0, 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 __user *p = buffer;
+ unsigned i;
+
+ for (i = 0, p = buffer; i < nbytes; ++i, p += 2) {
+ unsigned v, w, status;
+
+ if (get_user(v, p) || get_user(w, p + 1))
+ return -EFAULT;
+ switch (v) {
+ case SSIN_UACPROC:
+ w &= UAC_BITMASK;
+ status = current_thread_info()->status;
+ status = (status & ~UAC_BITMASK) | w;
+ current_thread_info()->status = status;
+ break;
+
+ default:
+ return -EOPNOTSUPP;
+ }
+ }
+ return 0;
+ }
+
+ case SSI_LMF:
+ 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 timespec64 *o, struct timeval32 __user *i)
+{
+ struct timeval32 tv;
+ if (copy_from_user(&tv, i, sizeof(struct timeval32)))
+ return -EFAULT;
+ o->tv_sec = tv.tv_sec;
+ o->tv_nsec = tv.tv_usec * NSEC_PER_USEC;
+ return 0;
+}
+
+static inline long
+put_tv32(struct timeval32 __user *o, struct timespec64 *i)
+{
+ return copy_to_user(o, &(struct timeval32){
+ .tv_sec = i->tv_sec,
+ .tv_usec = i->tv_nsec / NSEC_PER_USEC},
+ sizeof(struct timeval32));
+}
+
+static inline long
+put_tv_to_tv32(struct timeval32 __user *o, struct __kernel_old_timeval *i)
+{
+ return copy_to_user(o, &(struct timeval32){
+ .tv_sec = i->tv_sec,
+ .tv_usec = i->tv_usec},
+ sizeof(struct timeval32));
+}
+
+static inline void
+jiffies_to_timeval32(unsigned long jiffies, struct timeval32 *value)
+{
+ value->tv_usec = (jiffies % HZ) * (1000000L / HZ);
+ value->tv_sec = jiffies / HZ;
+}
+
+SYSCALL_DEFINE2(osf_gettimeofday, struct timeval32 __user *, tv,
+ struct timezone __user *, tz)
+{
+ if (tv) {
+ struct timespec64 kts;
+
+ ktime_get_real_ts64(&kts);
+ if (put_tv32(tv, &kts))
+ return -EFAULT;
+ }
+ if (tz) {
+ if (copy_to_user(tz, &sys_tz, sizeof(sys_tz)))
+ return -EFAULT;
+ }
+ return 0;
+}
+
+SYSCALL_DEFINE2(osf_settimeofday, struct timeval32 __user *, tv,
+ struct timezone __user *, tz)
+{
+ struct timespec64 kts;
+ struct timezone ktz;
+
+ if (tv) {
+ if (get_tv32(&kts, tv))
+ return -EFAULT;
+ }
+ if (tz) {
+ if (copy_from_user(&ktz, tz, sizeof(*tz)))
+ return -EFAULT;
+ }
+
+ return do_sys_settimeofday64(tv ? &kts : NULL, tz ? &ktz : NULL);
+}
+
+asmlinkage long sys_ni_posix_timers(void);
+
+SYSCALL_DEFINE2(osf_utimes, const char __user *, filename,
+ struct timeval32 __user *, tvs)
+{
+ struct timespec64 tv[2];
+
+ if (tvs) {
+ if (get_tv32(&tv[0], &tvs[0]) ||
+ get_tv32(&tv[1], &tvs[1]))
+ return -EFAULT;
+
+ if (tv[0].tv_nsec < 0 || tv[0].tv_nsec >= 1000000000 ||
+ tv[1].tv_nsec < 0 || tv[1].tv_nsec >= 1000000000)
+ return -EINVAL;
+ }
+
+ return do_utimes(AT_FDCWD, filename, tvs ? tv : NULL, 0);
+}
+
+SYSCALL_DEFINE5(osf_select, int, n, fd_set __user *, inp, fd_set __user *, outp,
+ fd_set __user *, exp, struct timeval32 __user *, tvp)
+{
+ struct timespec64 end_time, *to = NULL;
+ if (tvp) {
+ struct timespec64 tv;
+ to = &end_time;
+
+ if (get_tv32(&tv, tvp))
+ return -EFAULT;
+
+ if (tv.tv_sec < 0 || tv.tv_nsec < 0)
+ return -EINVAL;
+
+ if (poll_select_set_timeout(to, tv.tv_sec, tv.tv_nsec))
+ return -EINVAL;
+
+ }
+
+ /* OSF does not copy back the remaining time. */
+ return core_sys_select(n, inp, outp, exp, to);
+}
+
+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 " */
+};
+
+SYSCALL_DEFINE2(osf_getrusage, int, who, struct rusage32 __user *, ru)
+{
+ struct rusage32 r;
+ u64 utime, stime;
+ unsigned long utime_jiffies, stime_jiffies;
+
+ if (who != RUSAGE_SELF && who != RUSAGE_CHILDREN)
+ return -EINVAL;
+
+ memset(&r, 0, sizeof(r));
+ switch (who) {
+ case RUSAGE_SELF:
+ task_cputime(current, &utime, &stime);
+ utime_jiffies = nsecs_to_jiffies(utime);
+ stime_jiffies = nsecs_to_jiffies(stime);
+ jiffies_to_timeval32(utime_jiffies, &r.ru_utime);
+ jiffies_to_timeval32(stime_jiffies, &r.ru_stime);
+ r.ru_minflt = current->min_flt;
+ r.ru_majflt = current->maj_flt;
+ break;
+ case RUSAGE_CHILDREN:
+ utime_jiffies = nsecs_to_jiffies(current->signal->cutime);
+ stime_jiffies = nsecs_to_jiffies(current->signal->cstime);
+ jiffies_to_timeval32(utime_jiffies, &r.ru_utime);
+ jiffies_to_timeval32(stime_jiffies, &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;
+}
+
+SYSCALL_DEFINE4(osf_wait4, pid_t, pid, int __user *, ustatus, int, options,
+ struct rusage32 __user *, ur)
+{
+ struct rusage r;
+ long err = kernel_wait4(pid, ustatus, options, &r);
+ if (err <= 0)
+ return err;
+ if (!ur)
+ return err;
+ if (put_tv_to_tv32(&ur->ru_utime, &r.ru_utime))
+ return -EFAULT;
+ if (put_tv_to_tv32(&ur->ru_stime, &r.ru_stime))
+ return -EFAULT;
+ if (copy_to_user(&ur->ru_maxrss, &r.ru_maxrss,
+ sizeof(struct rusage32) - offsetof(struct rusage32, ru_maxrss)))
+ return -EFAULT;
+ return err;
+}
+
+/*
+ * 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.
+ */
+SYSCALL_DEFINE2(osf_usleep_thread, struct timeval32 __user *, sleep,
+ struct timeval32 __user *, remain)
+{
+ struct timespec64 tmp;
+ unsigned long ticks;
+
+ if (get_tv32(&tmp, sleep))
+ goto fault;
+
+ ticks = timespec64_to_jiffies(&tmp);
+
+ ticks = schedule_timeout_interruptible(ticks);
+
+ if (remain) {
+ jiffies_to_timespec64(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;
+};
+
+SYSCALL_DEFINE1(old_adjtimex, struct timex32 __user *, txc_p)
+{
+ struct __kernel_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, tick)))
+ 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_user(txc.time.tv_sec, &txc_p->time.tv_sec)) ||
+ (put_user(txc.time.tv_usec, &txc_p->time.tv_usec)))
+ 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_unmapped_area_info info;
+
+ info.flags = 0;
+ info.length = len;
+ info.low_limit = addr;
+ info.high_limit = limit;
+ info.align_mask = 0;
+ info.align_offset = 0;
+ return vm_unmapped_area(&info);
+}
+
+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;
+
+ if (flags & MAP_FIXED)
+ return addr;
+
+ /* 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;
+}
+#endif
+
+SYSCALL_DEFINE3(osf_readv, unsigned long, fd,
+ const struct iovec __user *, vector, unsigned long, count)
+{
+#ifdef CONFIG_OSF4_COMPAT
+ if (unlikely(personality(current->personality) == PER_OSF4))
+ if (osf_fix_iov_len(vector, count))
+ return -EFAULT;
+#endif
+
+ return sys_readv(fd, vector, count);
+}
+
+SYSCALL_DEFINE3(osf_writev, unsigned long, fd,
+ const struct iovec __user *, vector, unsigned long, count)
+{
+#ifdef CONFIG_OSF4_COMPAT
+ if (unlikely(personality(current->personality) == PER_OSF4))
+ if (osf_fix_iov_len(vector, count))
+ return -EFAULT;
+#endif
+ return sys_writev(fd, vector, count);
+}
+
+SYSCALL_DEFINE2(osf_getpriority, int, which, int, who)
+{
+ int prio = sys_getpriority(which, who);
+ if (prio >= 0) {
+ /* Return value is the unbiased priority, i.e. 20 - prio.
+ This does result in negative return values, so signal
+ no error */
+ force_successful_syscall_return();
+ prio = 20 - prio;
+ }
+ return prio;
+}
+
+SYSCALL_DEFINE0(getxuid)
+{
+ current_pt_regs()->r20 = sys_geteuid();
+ return sys_getuid();
+}
+
+SYSCALL_DEFINE0(getxgid)
+{
+ current_pt_regs()->r20 = sys_getegid();
+ return sys_getgid();
+}
+
+SYSCALL_DEFINE0(getxpid)
+{
+ current_pt_regs()->r20 = sys_getppid();
+ return sys_getpid();
+}
+
+SYSCALL_DEFINE0(alpha_pipe)
+{
+ int fd[2];
+ int res = do_pipe_flags(fd, 0);
+ if (!res) {
+ /* The return values are in $0 and $20. */
+ current_pt_regs()->r20 = fd[1];
+ res = fd[0];
+ }
+ return res;
+}
+
+SYSCALL_DEFINE1(sethae, unsigned long, val)
+{
+ current_pt_regs()->hae = val;
+ return 0;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-27 13:38:18 +0000