osf_sys.c

   1// SPDX-License-Identifier: GPL-2.0
   2/*
   3 *  linux/arch/alpha/kernel/osf_sys.c
   4 *
   5 *  Copyright (C) 1995  Linus Torvalds
   6 */
   7
   8/*
   9 * This file handles some of the stranger OSF/1 system call interfaces.
  10 * Some of the system calls expect a non-C calling standard, others have
  11 * special parameter blocks..
  12 */
  13
  14#include <linux/errno.h>
  15#include <linux/sched/signal.h>
  16#include <linux/sched/mm.h>
  17#include <linux/sched/task_stack.h>
  18#include <linux/sched/cputime.h>
  19#include <linux/kernel.h>
  20#include <linux/mm.h>
  21#include <linux/smp.h>
  22#include <linux/stddef.h>
  23#include <linux/syscalls.h>
  24#include <linux/unistd.h>
  25#include <linux/ptrace.h>
  26#include <linux/user.h>
  27#include <linux/utsname.h>
  28#include <linux/time.h>
  29#include <linux/timex.h>
  30#include <linux/major.h>
  31#include <linux/stat.h>
  32#include <linux/mman.h>
  33#include <linux/shm.h>
  34#include <linux/poll.h>
  35#include <linux/file.h>
  36#include <linux/types.h>
  37#include <linux/ipc.h>
  38#include <linux/namei.h>
  39#include <linux/mount.h>
  40#include <linux/uio.h>
  41#include <linux/vfs.h>
  42#include <linux/rcupdate.h>
  43#include <linux/slab.h>
  44
  45#include <asm/fpu.h>
  46#include <asm/io.h>
  47#include <linux/uaccess.h>
  48#include <asm/sysinfo.h>
  49#include <asm/thread_info.h>
  50#include <asm/hwrpb.h>
  51#include <asm/processor.h>
  52
  53/*
  54 * Brk needs to return an error.  Still support Linux's brk(0) query idiom,
  55 * which OSF programs just shouldn't be doing.  We're still not quite
  56 * identical to OSF as we don't return 0 on success, but doing otherwise
  57 * would require changes to libc.  Hopefully this is good enough.
  58 */
  59SYSCALL_DEFINE1(osf_brk, unsigned long, brk)
  60{
  61	unsigned long retval = sys_brk(brk);
  62	if (brk && brk != retval)
  63		retval = -ENOMEM;
  64	return retval;
  65}
  66 
  67/*
  68 * This is pure guess-work..
  69 */
  70SYSCALL_DEFINE4(osf_set_program_attributes, unsigned long, text_start,
  71		unsigned long, text_len, unsigned long, bss_start,
  72		unsigned long, bss_len)
  73{
  74	struct mm_struct *mm;
  75
  76	mm = current->mm;
  77	mm->end_code = bss_start + bss_len;
  78	mm->start_brk = bss_start + bss_len;
  79	mm->brk = bss_start + bss_len;
  80#if 0
  81	printk("set_program_attributes(%lx %lx %lx %lx)\n",
  82		text_start, text_len, bss_start, bss_len);
  83#endif
  84	return 0;
  85}
  86
  87/*
  88 * OSF/1 directory handling functions...
  89 *
  90 * The "getdents()" interface is much more sane: the "basep" stuff is
  91 * braindamage (it can't really handle filesystems where the directory
  92 * offset differences aren't the same as "d_reclen").
  93 */
  94#define NAME_OFFSET	offsetof (struct osf_dirent, d_name)
  95
  96struct osf_dirent {
  97	unsigned int d_ino;
  98	unsigned short d_reclen;
  99	unsigned short d_namlen;
 100	char d_name[];
 101};
 102
 103struct osf_dirent_callback {
 104	struct dir_context ctx;
 105	struct osf_dirent __user *dirent;
 106	long __user *basep;
 107	unsigned int count;
 108	int error;
 109};
 110
 111static bool
 112osf_filldir(struct dir_context *ctx, const char *name, int namlen,
 113	    loff_t offset, u64 ino, unsigned int d_type)
 114{
 115	struct osf_dirent __user *dirent;
 116	struct osf_dirent_callback *buf =
 117		container_of(ctx, struct osf_dirent_callback, ctx);
 118	unsigned int reclen = ALIGN(NAME_OFFSET + namlen + 1, sizeof(u32));
 119	unsigned int d_ino;
 120
 121	buf->error = -EINVAL;	/* only used if we fail */
 122	if (reclen > buf->count)
 123		return false;
 124	d_ino = ino;
 125	if (sizeof(d_ino) < sizeof(ino) && d_ino != ino) {
 126		buf->error = -EOVERFLOW;
 127		return false;
 128	}
 129	if (buf->basep) {
 130		if (put_user(offset, buf->basep))
 131			goto Efault;
 132		buf->basep = NULL;
 133	}
 134	dirent = buf->dirent;
 135	if (put_user(d_ino, &dirent->d_ino) ||
 136	    put_user(namlen, &dirent->d_namlen) ||
 137	    put_user(reclen, &dirent->d_reclen) ||
 138	    copy_to_user(dirent->d_name, name, namlen) ||
 139	    put_user(0, dirent->d_name + namlen))
 140		goto Efault;
 141	dirent = (void __user *)dirent + reclen;
 142	buf->dirent = dirent;
 143	buf->count -= reclen;
 144	return true;
 145Efault:
 146	buf->error = -EFAULT;
 147	return false;
 148}
 149
 150SYSCALL_DEFINE4(osf_getdirentries, unsigned int, fd,
 151		struct osf_dirent __user *, dirent, unsigned int, count,
 152		long __user *, basep)
 153{
 154	int error;
 155	CLASS(fd_pos, arg)(fd);
 156	struct osf_dirent_callback buf = {
 157		.ctx.actor = osf_filldir,
 158		.dirent = dirent,
 159		.basep = basep,
 160		.count = count
 161	};
 162
 163	if (fd_empty(arg))
 164		return -EBADF;
 165
 166	error = iterate_dir(fd_file(arg), &buf.ctx);
 167	if (error >= 0)
 168		error = buf.error;
 169	if (count != buf.count)
 170		error = count - buf.count;
 171
 172	return error;
 173}
 174
 175#undef NAME_OFFSET
 176
 177SYSCALL_DEFINE6(osf_mmap, unsigned long, addr, unsigned long, len,
 178		unsigned long, prot, unsigned long, flags, unsigned long, fd,
 179		unsigned long, off)
 180{
 181	unsigned long ret = -EINVAL;
 182
 183#if 0
 184	if (flags & (_MAP_HASSEMAPHORE | _MAP_INHERIT | _MAP_UNALIGNED))
 185		printk("%s: unimplemented OSF mmap flags %04lx\n", 
 186			current->comm, flags);
 187#endif
 188	if ((off + PAGE_ALIGN(len)) < off)
 189		goto out;
 190	if (off & ~PAGE_MASK)
 191		goto out;
 192	ret = ksys_mmap_pgoff(addr, len, prot, flags, fd, off >> PAGE_SHIFT);
 193 out:
 194	return ret;
 195}
 196
 197struct osf_stat {
 198	int		st_dev;
 199	int		st_pad1;
 200	unsigned	st_mode;
 201	unsigned short	st_nlink;
 202	short		st_nlink_reserved;
 203	unsigned	st_uid;
 204	unsigned	st_gid;
 205	int		st_rdev;
 206	int		st_ldev;
 207	long		st_size;
 208	int		st_pad2;
 209	int		st_uatime;
 210	int		st_pad3;
 211	int		st_umtime;
 212	int		st_pad4;
 213	int		st_uctime;
 214	int		st_pad5;
 215	int		st_pad6;
 216	unsigned	st_flags;
 217	unsigned	st_gen;
 218	long		st_spare[4];
 219	unsigned	st_ino;
 220	int		st_ino_reserved;
 221	int		st_atime;
 222	int		st_atime_reserved;
 223	int		st_mtime;
 224	int		st_mtime_reserved;
 225	int		st_ctime;
 226	int		st_ctime_reserved;
 227	long		st_blksize;
 228	long		st_blocks;
 229};
 230
 231/*
 232 * The OSF/1 statfs structure is much larger, but this should
 233 * match the beginning, at least.
 234 */
 235struct osf_statfs {
 236	short f_type;
 237	short f_flags;
 238	int f_fsize;
 239	int f_bsize;
 240	int f_blocks;
 241	int f_bfree;
 242	int f_bavail;
 243	int f_files;
 244	int f_ffree;
 245	__kernel_fsid_t f_fsid;
 246};
 247
 248struct osf_statfs64 {
 249	short f_type;
 250	short f_flags;
 251	int f_pad1;
 252	int f_pad2;
 253	int f_pad3;
 254	int f_pad4;
 255	int f_pad5;
 256	int f_pad6;
 257	int f_pad7;
 258	__kernel_fsid_t f_fsid;
 259	u_short f_namemax;
 260	short f_reserved1;
 261	int f_spare[8];
 262	char f_pad8[90];
 263	char f_pad9[90];
 264	long mount_info[10];
 265	u_long f_flags2;
 266	long f_spare2[14];
 267	long f_fsize;
 268	long f_bsize;
 269	long f_blocks;
 270	long f_bfree;
 271	long f_bavail;
 272	long f_files;
 273	long f_ffree;
 274};
 275
 276static int
 277linux_to_osf_stat(struct kstat *lstat, struct osf_stat __user *osf_stat)
 278{
 279	struct osf_stat tmp = { 0 };
 280
 281	tmp.st_dev	= lstat->dev;
 282	tmp.st_mode	= lstat->mode;
 283	tmp.st_nlink	= lstat->nlink;
 284	tmp.st_uid	= from_kuid_munged(current_user_ns(), lstat->uid);
 285	tmp.st_gid	= from_kgid_munged(current_user_ns(), lstat->gid);
 286	tmp.st_rdev	= lstat->rdev;
 287	tmp.st_ldev	= lstat->rdev;
 288	tmp.st_size	= lstat->size;
 289	tmp.st_uatime	= lstat->atime.tv_nsec / 1000;
 290	tmp.st_umtime	= lstat->mtime.tv_nsec / 1000;
 291	tmp.st_uctime	= lstat->ctime.tv_nsec / 1000;
 292	tmp.st_ino	= lstat->ino;
 293	tmp.st_atime	= lstat->atime.tv_sec;
 294	tmp.st_mtime	= lstat->mtime.tv_sec;
 295	tmp.st_ctime	= lstat->ctime.tv_sec;
 296	tmp.st_blksize	= lstat->blksize;
 297	tmp.st_blocks	= lstat->blocks;
 298
 299	return copy_to_user(osf_stat, &tmp, sizeof(tmp)) ? -EFAULT : 0;
 300}
 301
 302static int
 303linux_to_osf_statfs(struct kstatfs *linux_stat, struct osf_statfs __user *osf_stat,
 304		    unsigned long bufsiz)
 305{
 306	struct osf_statfs tmp_stat;
 307
 308	tmp_stat.f_type = linux_stat->f_type;
 309	tmp_stat.f_flags = 0;	/* mount flags */
 310	tmp_stat.f_fsize = linux_stat->f_frsize;
 311	tmp_stat.f_bsize = linux_stat->f_bsize;
 312	tmp_stat.f_blocks = linux_stat->f_blocks;
 313	tmp_stat.f_bfree = linux_stat->f_bfree;
 314	tmp_stat.f_bavail = linux_stat->f_bavail;
 315	tmp_stat.f_files = linux_stat->f_files;
 316	tmp_stat.f_ffree = linux_stat->f_ffree;
 317	tmp_stat.f_fsid = linux_stat->f_fsid;
 318	if (bufsiz > sizeof(tmp_stat))
 319		bufsiz = sizeof(tmp_stat);
 320	return copy_to_user(osf_stat, &tmp_stat, bufsiz) ? -EFAULT : 0;
 321}
 322
 323static int
 324linux_to_osf_statfs64(struct kstatfs *linux_stat, struct osf_statfs64 __user *osf_stat,
 325		      unsigned long bufsiz)
 326{
 327	struct osf_statfs64 tmp_stat = { 0 };
 328
 329	tmp_stat.f_type = linux_stat->f_type;
 330	tmp_stat.f_fsize = linux_stat->f_frsize;
 331	tmp_stat.f_bsize = linux_stat->f_bsize;
 332	tmp_stat.f_blocks = linux_stat->f_blocks;
 333	tmp_stat.f_bfree = linux_stat->f_bfree;
 334	tmp_stat.f_bavail = linux_stat->f_bavail;
 335	tmp_stat.f_files = linux_stat->f_files;
 336	tmp_stat.f_ffree = linux_stat->f_ffree;
 337	tmp_stat.f_fsid = linux_stat->f_fsid;
 338	if (bufsiz > sizeof(tmp_stat))
 339		bufsiz = sizeof(tmp_stat);
 340	return copy_to_user(osf_stat, &tmp_stat, bufsiz) ? -EFAULT : 0;
 341}
 342
 343SYSCALL_DEFINE3(osf_statfs, const char __user *, pathname,
 344		struct osf_statfs __user *, buffer, unsigned long, bufsiz)
 345{
 346	struct kstatfs linux_stat;
 347	int error = user_statfs(pathname, &linux_stat);
 348	if (!error)
 349		error = linux_to_osf_statfs(&linux_stat, buffer, bufsiz);
 350	return error;	
 351}
 352
 353SYSCALL_DEFINE2(osf_stat, char __user *, name, struct osf_stat __user *, buf)
 354{
 355	struct kstat stat;
 356	int error;
 357
 358	error = vfs_stat(name, &stat);
 359	if (error)
 360		return error;
 361
 362	return linux_to_osf_stat(&stat, buf);
 363}
 364
 365SYSCALL_DEFINE2(osf_lstat, char __user *, name, struct osf_stat __user *, buf)
 366{
 367	struct kstat stat;
 368	int error;
 369
 370	error = vfs_lstat(name, &stat);
 371	if (error)
 372		return error;
 373
 374	return linux_to_osf_stat(&stat, buf);
 375}
 376
 377SYSCALL_DEFINE2(osf_fstat, int, fd, struct osf_stat __user *, buf)
 378{
 379	struct kstat stat;
 380	int error;
 381
 382	error = vfs_fstat(fd, &stat);
 383	if (error)
 384		return error;
 385
 386	return linux_to_osf_stat(&stat, buf);
 387}
 388
 389SYSCALL_DEFINE3(osf_fstatfs, unsigned long, fd,
 390		struct osf_statfs __user *, buffer, unsigned long, bufsiz)
 391{
 392	struct kstatfs linux_stat;
 393	int error = fd_statfs(fd, &linux_stat);
 394	if (!error)
 395		error = linux_to_osf_statfs(&linux_stat, buffer, bufsiz);
 396	return error;
 397}
 398
 399SYSCALL_DEFINE3(osf_statfs64, char __user *, pathname,
 400		struct osf_statfs64 __user *, buffer, unsigned long, bufsiz)
 401{
 402	struct kstatfs linux_stat;
 403	int error = user_statfs(pathname, &linux_stat);
 404	if (!error)
 405		error = linux_to_osf_statfs64(&linux_stat, buffer, bufsiz);
 406	return error;
 407}
 408
 409SYSCALL_DEFINE3(osf_fstatfs64, unsigned long, fd,
 410		struct osf_statfs64 __user *, buffer, unsigned long, bufsiz)
 411{
 412	struct kstatfs linux_stat;
 413	int error = fd_statfs(fd, &linux_stat);
 414	if (!error)
 415		error = linux_to_osf_statfs64(&linux_stat, buffer, bufsiz);
 416	return error;
 417}
 418
 419/*
 420 * Uhh.. OSF/1 mount parameters aren't exactly obvious..
 421 *
 422 * Although to be frank, neither are the native Linux/i386 ones..
 423 */
 424struct ufs_args {
 425	char __user *devname;
 426	int flags;
 427	uid_t exroot;
 428};
 429
 430struct cdfs_args {
 431	char __user *devname;
 432	int flags;
 433	uid_t exroot;
 434
 435	/* This has lots more here, which Linux handles with the option block
 436	   but I'm too lazy to do the translation into ASCII.  */
 437};
 438
 439struct procfs_args {
 440	char __user *devname;
 441	int flags;
 442	uid_t exroot;
 443};
 444
 445/*
 446 * We can't actually handle ufs yet, so we translate UFS mounts to
 447 * ext2fs mounts. I wouldn't mind a UFS filesystem, but the UFS
 448 * layout is so braindead it's a major headache doing it.
 449 *
 450 * Just how long ago was it written? OTOH our UFS driver may be still
 451 * unhappy with OSF UFS. [CHECKME]
 452 */
 453static int
 454osf_ufs_mount(const char __user *dirname,
 455	      struct ufs_args __user *args, int flags)
 456{
 457	int retval;
 458	struct cdfs_args tmp;
 459	struct filename *devname;
 460
 461	retval = -EFAULT;
 462	if (copy_from_user(&tmp, args, sizeof(tmp)))
 463		goto out;
 464	devname = getname(tmp.devname);
 465	retval = PTR_ERR(devname);
 466	if (IS_ERR(devname))
 467		goto out;
 468	retval = do_mount(devname->name, dirname, "ext2", flags, NULL);
 469	putname(devname);
 470 out:
 471	return retval;
 472}
 473
 474static int
 475osf_cdfs_mount(const char __user *dirname,
 476	       struct cdfs_args __user *args, int flags)
 477{
 478	int retval;
 479	struct cdfs_args tmp;
 480	struct filename *devname;
 481
 482	retval = -EFAULT;
 483	if (copy_from_user(&tmp, args, sizeof(tmp)))
 484		goto out;
 485	devname = getname(tmp.devname);
 486	retval = PTR_ERR(devname);
 487	if (IS_ERR(devname))
 488		goto out;
 489	retval = do_mount(devname->name, dirname, "iso9660", flags, NULL);
 490	putname(devname);
 491 out:
 492	return retval;
 493}
 494
 495static int
 496osf_procfs_mount(const char __user *dirname,
 497		 struct procfs_args __user *args, int flags)
 498{
 499	struct procfs_args tmp;
 500
 501	if (copy_from_user(&tmp, args, sizeof(tmp)))
 502		return -EFAULT;
 503
 504	return do_mount("", dirname, "proc", flags, NULL);
 505}
 506
 507SYSCALL_DEFINE4(osf_mount, unsigned long, typenr, const char __user *, path,
 508		int, flag, void __user *, data)
 509{
 510	int retval;
 511
 512	switch (typenr) {
 513	case 1:
 514		retval = osf_ufs_mount(path, data, flag);
 515		break;
 516	case 6:
 517		retval = osf_cdfs_mount(path, data, flag);
 518		break;
 519	case 9:
 520		retval = osf_procfs_mount(path, data, flag);
 521		break;
 522	default:
 523		retval = -EINVAL;
 524		printk_ratelimited("osf_mount(%ld, %x)\n", typenr, flag);
 525	}
 526
 527	return retval;
 528}
 529
 530SYSCALL_DEFINE1(osf_utsname, char __user *, name)
 531{
 532	char tmp[5 * 32];
 533
 534	down_read(&uts_sem);
 535	memcpy(tmp + 0 * 32, utsname()->sysname, 32);
 536	memcpy(tmp + 1 * 32, utsname()->nodename, 32);
 537	memcpy(tmp + 2 * 32, utsname()->release, 32);
 538	memcpy(tmp + 3 * 32, utsname()->version, 32);
 539	memcpy(tmp + 4 * 32, utsname()->machine, 32);
 540	up_read(&uts_sem);
 541
 542	if (copy_to_user(name, tmp, sizeof(tmp)))
 543		return -EFAULT;
 544	return 0;
 545}
 546
 547SYSCALL_DEFINE0(getpagesize)
 548{
 549	return PAGE_SIZE;
 550}
 551
 552SYSCALL_DEFINE0(getdtablesize)
 553{
 554	return sysctl_nr_open;
 555}
 556
 557/*
 558 * For compatibility with OSF/1 only.  Use utsname(2) instead.
 559 */
 560SYSCALL_DEFINE2(osf_getdomainname, char __user *, name, int, namelen)
 561{
 562	int len;
 563	char *kname;
 564	char tmp[32];
 565
 566	if (namelen < 0 || namelen > 32)
 567		namelen = 32;
 568
 569	down_read(&uts_sem);
 570	kname = utsname()->domainname;
 571	len = strnlen(kname, namelen);
 572	len = min(len + 1, namelen);
 573	memcpy(tmp, kname, len);
 574	up_read(&uts_sem);
 575
 576	if (copy_to_user(name, tmp, len))
 577		return -EFAULT;
 578	return 0;
 579}
 580
 581/*
 582 * The following stuff should move into a header file should it ever
 583 * be labeled "officially supported."  Right now, there is just enough
 584 * support to avoid applications (such as tar) printing error
 585 * messages.  The attributes are not really implemented.
 586 */
 587
 588/*
 589 * Values for Property list entry flag
 590 */
 591#define PLE_PROPAGATE_ON_COPY		0x1	/* cp(1) will copy entry
 592						   by default */
 593#define PLE_FLAG_MASK			0x1	/* Valid flag values */
 594#define PLE_FLAG_ALL			-1	/* All flag value */
 595
 596struct proplistname_args {
 597	unsigned int pl_mask;
 598	unsigned int pl_numnames;
 599	char **pl_names;
 600};
 601
 602union pl_args {
 603	struct setargs {
 604		char __user *path;
 605		long follow;
 606		long nbytes;
 607		char __user *buf;
 608	} set;
 609	struct fsetargs {
 610		long fd;
 611		long nbytes;
 612		char __user *buf;
 613	} fset;
 614	struct getargs {
 615		char __user *path;
 616		long follow;
 617		struct proplistname_args __user *name_args;
 618		long nbytes;
 619		char __user *buf;
 620		int __user *min_buf_size;
 621	} get;
 622	struct fgetargs {
 623		long fd;
 624		struct proplistname_args __user *name_args;
 625		long nbytes;
 626		char __user *buf;
 627		int __user *min_buf_size;
 628	} fget;
 629	struct delargs {
 630		char __user *path;
 631		long follow;
 632		struct proplistname_args __user *name_args;
 633	} del;
 634	struct fdelargs {
 635		long fd;
 636		struct proplistname_args __user *name_args;
 637	} fdel;
 638};
 639
 640enum pl_code {
 641	PL_SET = 1, PL_FSET = 2,
 642	PL_GET = 3, PL_FGET = 4,
 643	PL_DEL = 5, PL_FDEL = 6
 644};
 645
 646SYSCALL_DEFINE2(osf_proplist_syscall, enum pl_code, code,
 647		union pl_args __user *, args)
 648{
 649	long error;
 650	int __user *min_buf_size_ptr;
 651
 652	switch (code) {
 653	case PL_SET:
 654		if (get_user(error, &args->set.nbytes))
 655			error = -EFAULT;
 656		break;
 657	case PL_FSET:
 658		if (get_user(error, &args->fset.nbytes))
 659			error = -EFAULT;
 660		break;
 661	case PL_GET:
 662		error = get_user(min_buf_size_ptr, &args->get.min_buf_size);
 663		if (error)
 664			break;
 665		error = put_user(0, min_buf_size_ptr);
 666		break;
 667	case PL_FGET:
 668		error = get_user(min_buf_size_ptr, &args->fget.min_buf_size);
 669		if (error)
 670			break;
 671		error = put_user(0, min_buf_size_ptr);
 672		break;
 673	case PL_DEL:
 674	case PL_FDEL:
 675		error = 0;
 676		break;
 677	default:
 678		error = -EOPNOTSUPP;
 679		break;
 680	}
 681	return error;
 682}
 683
 684SYSCALL_DEFINE2(osf_sigstack, struct sigstack __user *, uss,
 685		struct sigstack __user *, uoss)
 686{
 687	unsigned long usp = rdusp();
 688	unsigned long oss_sp = current->sas_ss_sp + current->sas_ss_size;
 689	unsigned long oss_os = on_sig_stack(usp);
 690	int error;
 691
 692	if (uss) {
 693		void __user *ss_sp;
 694
 695		error = -EFAULT;
 696		if (get_user(ss_sp, &uss->ss_sp))
 697			goto out;
 698
 699		/* If the current stack was set with sigaltstack, don't
 700		   swap stacks while we are on it.  */
 701		error = -EPERM;
 702		if (current->sas_ss_sp && on_sig_stack(usp))
 703			goto out;
 704
 705		/* Since we don't know the extent of the stack, and we don't
 706		   track onstack-ness, but rather calculate it, we must 
 707		   presume a size.  Ho hum this interface is lossy.  */
 708		current->sas_ss_sp = (unsigned long)ss_sp - SIGSTKSZ;
 709		current->sas_ss_size = SIGSTKSZ;
 710	}
 711
 712	if (uoss) {
 713		error = -EFAULT;
 714		if (put_user(oss_sp, &uoss->ss_sp) ||
 715		    put_user(oss_os, &uoss->ss_onstack))
 716			goto out;
 717	}
 718
 719	error = 0;
 720 out:
 721	return error;
 722}
 723
 724SYSCALL_DEFINE3(osf_sysinfo, int, command, char __user *, buf, long, count)
 725{
 726	const char *sysinfo_table[] = {
 727		utsname()->sysname,
 728		utsname()->nodename,
 729		utsname()->release,
 730		utsname()->version,
 731		utsname()->machine,
 732		"alpha",	/* instruction set architecture */
 733		"dummy",	/* hardware serial number */
 734		"dummy",	/* hardware manufacturer */
 735		"dummy",	/* secure RPC domain */
 736	};
 737	unsigned long offset;
 738	const char *res;
 739	long len;
 740	char tmp[__NEW_UTS_LEN + 1];
 741
 742	offset = command-1;
 743	if (offset >= ARRAY_SIZE(sysinfo_table)) {
 744		/* Digital UNIX has a few unpublished interfaces here */
 745		printk("sysinfo(%d)", command);
 746		return -EINVAL;
 747	}
 748
 749	down_read(&uts_sem);
 750	res = sysinfo_table[offset];
 751	len = strlen(res)+1;
 752	if ((unsigned long)len > (unsigned long)count)
 753		len = count;
 754	memcpy(tmp, res, len);
 755	up_read(&uts_sem);
 756	if (copy_to_user(buf, tmp, len))
 757		return -EFAULT;
 758	return 0;
 759}
 760
 761SYSCALL_DEFINE5(osf_getsysinfo, unsigned long, op, void __user *, buffer,
 762		unsigned long, nbytes, int __user *, start, void __user *, arg)
 763{
 764	unsigned long w;
 765	struct percpu_struct *cpu;
 766
 767	switch (op) {
 768	case GSI_IEEE_FP_CONTROL:
 769		/* Return current software fp control & status bits.  */
 770		/* Note that DU doesn't verify available space here.  */
 771
 772 		w = current_thread_info()->ieee_state & IEEE_SW_MASK;
 773 		w = swcr_update_status(w, rdfpcr());
 774		if (put_user(w, (unsigned long __user *) buffer))
 775			return -EFAULT;
 776		return 0;
 777
 778	case GSI_IEEE_STATE_AT_SIGNAL:
 779		/*
 780		 * Not sure anybody will ever use this weird stuff.  These
 781		 * ops can be used (under OSF/1) to set the fpcr that should
 782		 * be used when a signal handler starts executing.
 783		 */
 784		break;
 785
 786 	case GSI_UACPROC:
 787		if (nbytes < sizeof(unsigned int))
 788			return -EINVAL;
 789		w = current_thread_info()->status & UAC_BITMASK;
 790		if (put_user(w, (unsigned int __user *)buffer))
 791			return -EFAULT;
 792 		return 1;
 793
 794	case GSI_PROC_TYPE:
 795		if (nbytes < sizeof(unsigned long))
 796			return -EINVAL;
 797		cpu = (struct percpu_struct*)
 798		  ((char*)hwrpb + hwrpb->processor_offset);
 799		w = cpu->type;
 800		if (put_user(w, (unsigned long  __user*)buffer))
 801			return -EFAULT;
 802		return 1;
 803
 804	case GSI_GET_HWRPB:
 805		if (nbytes > sizeof(*hwrpb))
 806			return -EINVAL;
 807		if (copy_to_user(buffer, hwrpb, nbytes) != 0)
 808			return -EFAULT;
 809		return 1;
 810
 811	default:
 812		break;
 813	}
 814
 815	return -EOPNOTSUPP;
 816}
 817
 818SYSCALL_DEFINE5(osf_setsysinfo, unsigned long, op, void __user *, buffer,
 819		unsigned long, nbytes, int __user *, start, void __user *, arg)
 820{
 821	switch (op) {
 822	case SSI_IEEE_FP_CONTROL: {
 823		unsigned long swcr, fpcr;
 824		unsigned int *state;
 825
 826		/* 
 827		 * Alpha Architecture Handbook 4.7.7.3:
 828		 * To be fully IEEE compiant, we must track the current IEEE
 829		 * exception state in software, because spurious bits can be
 830		 * set in the trap shadow of a software-complete insn.
 831		 */
 832
 833		if (get_user(swcr, (unsigned long __user *)buffer))
 834			return -EFAULT;
 835		state = &current_thread_info()->ieee_state;
 836
 837		/* Update software trap enable bits.  */
 838		*state = (*state & ~IEEE_SW_MASK) | (swcr & IEEE_SW_MASK);
 839
 840		/* Update the real fpcr.  */
 841		fpcr = rdfpcr() & FPCR_DYN_MASK;
 842		fpcr |= ieee_swcr_to_fpcr(swcr);
 843		wrfpcr(fpcr);
 844
 845		return 0;
 846	}
 847
 848	case SSI_IEEE_RAISE_EXCEPTION: {
 849		unsigned long exc, swcr, fpcr, fex;
 850		unsigned int *state;
 851
 852		if (get_user(exc, (unsigned long __user *)buffer))
 853			return -EFAULT;
 854		state = &current_thread_info()->ieee_state;
 855		exc &= IEEE_STATUS_MASK;
 856
 857		/* Update software trap enable bits.  */
 858 		swcr = (*state & IEEE_SW_MASK) | exc;
 859		*state |= exc;
 860
 861		/* Update the real fpcr.  */
 862		fpcr = rdfpcr();
 863		fpcr |= ieee_swcr_to_fpcr(swcr);
 864		wrfpcr(fpcr);
 865
 866 		/* If any exceptions set by this call, and are unmasked,
 867		   send a signal.  Old exceptions are not signaled.  */
 868		fex = (exc >> IEEE_STATUS_TO_EXCSUM_SHIFT) & swcr;
 869 		if (fex) {
 870			int si_code = FPE_FLTUNK;
 871
 872			if (fex & IEEE_TRAP_ENABLE_DNO) si_code = FPE_FLTUND;
 873			if (fex & IEEE_TRAP_ENABLE_INE) si_code = FPE_FLTRES;
 874			if (fex & IEEE_TRAP_ENABLE_UNF) si_code = FPE_FLTUND;
 875			if (fex & IEEE_TRAP_ENABLE_OVF) si_code = FPE_FLTOVF;
 876			if (fex & IEEE_TRAP_ENABLE_DZE) si_code = FPE_FLTDIV;
 877			if (fex & IEEE_TRAP_ENABLE_INV) si_code = FPE_FLTINV;
 878
 879			send_sig_fault_trapno(SIGFPE, si_code,
 880				       (void __user *)NULL,  /* FIXME */
 881				       0, current);
 882 		}
 883		return 0;
 884	}
 885
 886	case SSI_IEEE_STATE_AT_SIGNAL:
 887	case SSI_IEEE_IGNORE_STATE_AT_SIGNAL:
 888		/*
 889		 * Not sure anybody will ever use this weird stuff.  These
 890		 * ops can be used (under OSF/1) to set the fpcr that should
 891		 * be used when a signal handler starts executing.
 892		 */
 893		break;
 894
 895 	case SSI_NVPAIRS: {
 896		unsigned __user *p = buffer;
 897		unsigned i;
 898		
 899		for (i = 0, p = buffer; i < nbytes; ++i, p += 2) {
 900			unsigned v, w, status;
 901
 902			if (get_user(v, p) || get_user(w, p + 1))
 903 				return -EFAULT;
 904 			switch (v) {
 905 			case SSIN_UACPROC:
 906				w &= UAC_BITMASK;
 907				status = current_thread_info()->status;
 908				status = (status & ~UAC_BITMASK) | w;
 909				current_thread_info()->status = status;
 910 				break;
 911 
 912 			default:
 913 				return -EOPNOTSUPP;
 914 			}
 915 		}
 916 		return 0;
 917	}
 918 
 919	case SSI_LMF:
 920		return 0;
 921
 922	default:
 923		break;
 924	}
 925
 926	return -EOPNOTSUPP;
 927}
 928
 929/* Translations due to the fact that OSF's time_t is an int.  Which
 930   affects all sorts of things, like timeval and itimerval.  */
 931
 932extern struct timezone sys_tz;
 933
 934struct timeval32
 935{
 936    int tv_sec, tv_usec;
 937};
 938
 939struct itimerval32
 940{
 941    struct timeval32 it_interval;
 942    struct timeval32 it_value;
 943};
 944
 945static inline long
 946get_tv32(struct timespec64 *o, struct timeval32 __user *i)
 947{
 948	struct timeval32 tv;
 949	if (copy_from_user(&tv, i, sizeof(struct timeval32)))
 950		return -EFAULT;
 951	o->tv_sec = tv.tv_sec;
 952	o->tv_nsec = tv.tv_usec * NSEC_PER_USEC;
 953	return 0;
 954}
 955
 956static inline long
 957put_tv32(struct timeval32 __user *o, struct timespec64 *i)
 958{
 959	return copy_to_user(o, &(struct timeval32){
 960				.tv_sec = i->tv_sec,
 961				.tv_usec = i->tv_nsec / NSEC_PER_USEC},
 962			    sizeof(struct timeval32));
 963}
 964
 965static inline long
 966put_tv_to_tv32(struct timeval32 __user *o, struct __kernel_old_timeval *i)
 967{
 968	return copy_to_user(o, &(struct timeval32){
 969				.tv_sec = i->tv_sec,
 970				.tv_usec = i->tv_usec},
 971			    sizeof(struct timeval32));
 972}
 973
 974static inline void
 975jiffies_to_timeval32(unsigned long jiffies, struct timeval32 *value)
 976{
 977	value->tv_usec = (jiffies % HZ) * (1000000L / HZ);
 978	value->tv_sec = jiffies / HZ;
 979}
 980
 981SYSCALL_DEFINE2(osf_gettimeofday, struct timeval32 __user *, tv,
 982		struct timezone __user *, tz)
 983{
 984	if (tv) {
 985		struct timespec64 kts;
 986
 987		ktime_get_real_ts64(&kts);
 988		if (put_tv32(tv, &kts))
 989			return -EFAULT;
 990	}
 991	if (tz) {
 992		if (copy_to_user(tz, &sys_tz, sizeof(sys_tz)))
 993			return -EFAULT;
 994	}
 995	return 0;
 996}
 997
 998SYSCALL_DEFINE2(osf_settimeofday, struct timeval32 __user *, tv,
 999		struct timezone __user *, tz)
1000{
1001	struct timespec64 kts;
1002	struct timezone ktz;
1003
1004 	if (tv) {
1005		if (get_tv32(&kts, tv))
1006			return -EFAULT;
1007	}
1008	if (tz) {
1009		if (copy_from_user(&ktz, tz, sizeof(*tz)))
1010			return -EFAULT;
1011	}
1012
1013	return do_sys_settimeofday64(tv ? &kts : NULL, tz ? &ktz : NULL);
1014}
1015
1016SYSCALL_DEFINE2(osf_utimes, const char __user *, filename,
1017		struct timeval32 __user *, tvs)
1018{
1019	struct timespec64 tv[2];
1020
1021	if (tvs) {
1022		if (get_tv32(&tv[0], &tvs[0]) ||
1023		    get_tv32(&tv[1], &tvs[1]))
1024			return -EFAULT;
1025
1026		if (tv[0].tv_nsec < 0 || tv[0].tv_nsec >= 1000000000 ||
1027		    tv[1].tv_nsec < 0 || tv[1].tv_nsec >= 1000000000)
1028			return -EINVAL;
1029	}
1030
1031	return do_utimes(AT_FDCWD, filename, tvs ? tv : NULL, 0);
1032}
1033
1034SYSCALL_DEFINE5(osf_select, int, n, fd_set __user *, inp, fd_set __user *, outp,
1035		fd_set __user *, exp, struct timeval32 __user *, tvp)
1036{
1037	struct timespec64 end_time, *to = NULL;
1038	if (tvp) {
1039		struct timespec64 tv;
1040		to = &end_time;
1041
1042		if (get_tv32(&tv, tvp))
1043		    	return -EFAULT;
1044
1045		if (tv.tv_sec < 0 || tv.tv_nsec < 0)
1046			return -EINVAL;
1047
1048		if (poll_select_set_timeout(to, tv.tv_sec, tv.tv_nsec))
1049			return -EINVAL;		
1050
1051	}
1052
1053	/* OSF does not copy back the remaining time.  */
1054	return core_sys_select(n, inp, outp, exp, to);
1055}
1056
1057struct rusage32 {
1058	struct timeval32 ru_utime;	/* user time used */
1059	struct timeval32 ru_stime;	/* system time used */
1060	long	ru_maxrss;		/* maximum resident set size */
1061	long	ru_ixrss;		/* integral shared memory size */
1062	long	ru_idrss;		/* integral unshared data size */
1063	long	ru_isrss;		/* integral unshared stack size */
1064	long	ru_minflt;		/* page reclaims */
1065	long	ru_majflt;		/* page faults */
1066	long	ru_nswap;		/* swaps */
1067	long	ru_inblock;		/* block input operations */
1068	long	ru_oublock;		/* block output operations */
1069	long	ru_msgsnd;		/* messages sent */
1070	long	ru_msgrcv;		/* messages received */
1071	long	ru_nsignals;		/* signals received */
1072	long	ru_nvcsw;		/* voluntary context switches */
1073	long	ru_nivcsw;		/* involuntary " */
1074};
1075
1076SYSCALL_DEFINE2(osf_getrusage, int, who, struct rusage32 __user *, ru)
1077{
1078	struct rusage32 r;
1079	u64 utime, stime;
1080	unsigned long utime_jiffies, stime_jiffies;
1081
1082	if (who != RUSAGE_SELF && who != RUSAGE_CHILDREN)
1083		return -EINVAL;
1084
1085	memset(&r, 0, sizeof(r));
1086	switch (who) {
1087	case RUSAGE_SELF:
1088		task_cputime(current, &utime, &stime);
1089		utime_jiffies = nsecs_to_jiffies(utime);
1090		stime_jiffies = nsecs_to_jiffies(stime);
1091		jiffies_to_timeval32(utime_jiffies, &r.ru_utime);
1092		jiffies_to_timeval32(stime_jiffies, &r.ru_stime);
1093		r.ru_minflt = current->min_flt;
1094		r.ru_majflt = current->maj_flt;
1095		break;
1096	case RUSAGE_CHILDREN:
1097		utime_jiffies = nsecs_to_jiffies(current->signal->cutime);
1098		stime_jiffies = nsecs_to_jiffies(current->signal->cstime);
1099		jiffies_to_timeval32(utime_jiffies, &r.ru_utime);
1100		jiffies_to_timeval32(stime_jiffies, &r.ru_stime);
1101		r.ru_minflt = current->signal->cmin_flt;
1102		r.ru_majflt = current->signal->cmaj_flt;
1103		break;
1104	}
1105
1106	return copy_to_user(ru, &r, sizeof(r)) ? -EFAULT : 0;
1107}
1108
1109SYSCALL_DEFINE4(osf_wait4, pid_t, pid, int __user *, ustatus, int, options,
1110		struct rusage32 __user *, ur)
1111{
1112	struct rusage r;
1113	long err = kernel_wait4(pid, ustatus, options, &r);
1114	if (err <= 0)
1115		return err;
1116	if (!ur)
1117		return err;
1118	if (put_tv_to_tv32(&ur->ru_utime, &r.ru_utime))
1119		return -EFAULT;
1120	if (put_tv_to_tv32(&ur->ru_stime, &r.ru_stime))
1121		return -EFAULT;
1122	if (copy_to_user(&ur->ru_maxrss, &r.ru_maxrss,
1123	      sizeof(struct rusage32) - offsetof(struct rusage32, ru_maxrss)))
1124		return -EFAULT;
1125	return err;
1126}
1127
1128/*
1129 * I don't know what the parameters are: the first one
1130 * seems to be a timeval pointer, and I suspect the second
1131 * one is the time remaining.. Ho humm.. No documentation.
1132 */
1133SYSCALL_DEFINE2(osf_usleep_thread, struct timeval32 __user *, sleep,
1134		struct timeval32 __user *, remain)
1135{
1136	struct timespec64 tmp;
1137	unsigned long ticks;
1138
1139	if (get_tv32(&tmp, sleep))
1140		goto fault;
1141
1142	ticks = timespec64_to_jiffies(&tmp);
1143
1144	ticks = schedule_timeout_interruptible(ticks);
1145
1146	if (remain) {
1147		jiffies_to_timespec64(ticks, &tmp);
1148		if (put_tv32(remain, &tmp))
1149			goto fault;
1150	}
1151	
1152	return 0;
1153 fault:
1154	return -EFAULT;
1155}
1156
1157
1158struct timex32 {
1159	unsigned int modes;	/* mode selector */
1160	long offset;		/* time offset (usec) */
1161	long freq;		/* frequency offset (scaled ppm) */
1162	long maxerror;		/* maximum error (usec) */
1163	long esterror;		/* estimated error (usec) */
1164	int status;		/* clock command/status */
1165	long constant;		/* pll time constant */
1166	long precision;		/* clock precision (usec) (read only) */
1167	long tolerance;		/* clock frequency tolerance (ppm)
1168				 * (read only)
1169				 */
1170	struct timeval32 time;	/* (read only) */
1171	long tick;		/* (modified) usecs between clock ticks */
1172
1173	long ppsfreq;           /* pps frequency (scaled ppm) (ro) */
1174	long jitter;            /* pps jitter (us) (ro) */
1175	int shift;              /* interval duration (s) (shift) (ro) */
1176	long stabil;            /* pps stability (scaled ppm) (ro) */
1177	long jitcnt;            /* jitter limit exceeded (ro) */
1178	long calcnt;            /* calibration intervals (ro) */
1179	long errcnt;            /* calibration errors (ro) */
1180	long stbcnt;            /* stability limit exceeded (ro) */
1181
1182	int  :32; int  :32; int  :32; int  :32;
1183	int  :32; int  :32; int  :32; int  :32;
1184	int  :32; int  :32; int  :32; int  :32;
1185};
1186
1187SYSCALL_DEFINE1(old_adjtimex, struct timex32 __user *, txc_p)
1188{
1189	struct __kernel_timex txc;
1190	int ret;
1191
1192	/* copy relevant bits of struct timex. */
1193	if (copy_from_user(&txc, txc_p, offsetof(struct timex32, time)) ||
1194	    copy_from_user(&txc.tick, &txc_p->tick, sizeof(struct timex32) - 
1195			   offsetof(struct timex32, tick)))
1196	  return -EFAULT;
1197
1198	ret = do_adjtimex(&txc);	
1199	if (ret < 0)
1200	  return ret;
1201	
1202	/* copy back to timex32 */
1203	if (copy_to_user(txc_p, &txc, offsetof(struct timex32, time)) ||
1204	    (copy_to_user(&txc_p->tick, &txc.tick, sizeof(struct timex32) - 
1205			  offsetof(struct timex32, tick))) ||
1206	    (put_user(txc.time.tv_sec, &txc_p->time.tv_sec)) ||
1207	    (put_user(txc.time.tv_usec, &txc_p->time.tv_usec)))
1208	  return -EFAULT;
1209
1210	return ret;
1211}
1212
1213/* Get an address range which is currently unmapped. */
1214
1215static unsigned long
1216arch_get_unmapped_area_1(unsigned long addr, unsigned long len,
1217		         unsigned long limit)
1218{
1219	struct vm_unmapped_area_info info = {};
1220
1221	info.length = len;
1222	info.low_limit = addr;
1223	info.high_limit = limit;
1224	return vm_unmapped_area(&info);
1225}
1226
1227unsigned long
1228arch_get_unmapped_area(struct file *filp, unsigned long addr,
1229		       unsigned long len, unsigned long pgoff,
1230		       unsigned long flags, vm_flags_t vm_flags)
1231{
1232	unsigned long limit = TASK_SIZE;
1233
1234	if (len > limit)
1235		return -ENOMEM;
1236
1237	if (flags & MAP_FIXED)
1238		return addr;
1239
1240	/* First, see if the given suggestion fits.
1241
1242	   The OSF/1 loader (/sbin/loader) relies on us returning an
1243	   address larger than the requested if one exists, which is
1244	   a terribly broken way to program.
1245
1246	   That said, I can see the use in being able to suggest not
1247	   merely specific addresses, but regions of memory -- perhaps
1248	   this feature should be incorporated into all ports?  */
1249
1250	if (addr) {
1251		addr = arch_get_unmapped_area_1 (PAGE_ALIGN(addr), len, limit);
1252		if (addr != (unsigned long) -ENOMEM)
1253			return addr;
1254	}
1255
1256	/* Next, try allocating at TASK_UNMAPPED_BASE.  */
1257	addr = arch_get_unmapped_area_1 (PAGE_ALIGN(TASK_UNMAPPED_BASE),
1258					 len, limit);
1259	if (addr != (unsigned long) -ENOMEM)
1260		return addr;
1261
1262	/* Finally, try allocating in low memory.  */
1263	addr = arch_get_unmapped_area_1 (PAGE_SIZE, len, limit);
1264
1265	return addr;
1266}
1267
1268SYSCALL_DEFINE2(osf_getpriority, int, which, int, who)
1269{
1270	int prio = sys_getpriority(which, who);
1271	if (prio >= 0) {
1272		/* Return value is the unbiased priority, i.e. 20 - prio.
1273		   This does result in negative return values, so signal
1274		   no error */
1275		force_successful_syscall_return();
1276		prio = 20 - prio;
1277	}
1278	return prio;
1279}
1280
1281SYSCALL_DEFINE0(getxuid)
1282{
1283	current_pt_regs()->r20 = sys_geteuid();
1284	return sys_getuid();
1285}
1286
1287SYSCALL_DEFINE0(getxgid)
1288{
1289	current_pt_regs()->r20 = sys_getegid();
1290	return sys_getgid();
1291}
1292
1293SYSCALL_DEFINE0(getxpid)
1294{
1295	current_pt_regs()->r20 = sys_getppid();
1296	return sys_getpid();
1297}
1298
1299SYSCALL_DEFINE0(alpha_pipe)
1300{
1301	int fd[2];
1302	int res = do_pipe_flags(fd, 0);
1303	if (!res) {
1304		/* The return values are in $0 and $20.  */
1305		current_pt_regs()->r20 = fd[1];
1306		res = fd[0];
1307	}
1308	return res;
1309}
1310
1311SYSCALL_DEFINE1(sethae, unsigned long, val)
1312{
1313	current_pt_regs()->hae = val;
1314	return 0;
1315}