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       1                 :            : /*
       2                 :            :  * Copyright (c) 1991, 1992 Paul Kranenburg <pk@cs.few.eur.nl>
       3                 :            :  * Copyright (c) 1993 Branko Lankester <branko@hacktic.nl>
       4                 :            :  * Copyright (c) 1993-1996 Rick Sladkey <jrs@world.std.com>
       5                 :            :  * Copyright (c) 1996-1999 Wichert Akkerman <wichert@cistron.nl>
       6                 :            :  * Copyright (c) 2002-2004 Roland McGrath <roland@redhat.com>
       7                 :            :  * Copyright (c) 2010 Andreas Schwab <schwab@linux-m68k.org>
       8                 :            :  * Copyright (c) 2014-2015 Dmitry V. Levin <ldv@altlinux.org>
       9                 :            :  * All rights reserved.
      10                 :            :  *
      11                 :            :  * Redistribution and use in source and binary forms, with or without
      12                 :            :  * modification, are permitted provided that the following conditions
      13                 :            :  * are met:
      14                 :            :  * 1. Redistributions of source code must retain the above copyright
      15                 :            :  *    notice, this list of conditions and the following disclaimer.
      16                 :            :  * 2. Redistributions in binary form must reproduce the above copyright
      17                 :            :  *    notice, this list of conditions and the following disclaimer in the
      18                 :            :  *    documentation and/or other materials provided with the distribution.
      19                 :            :  * 3. The name of the author may not be used to endorse or promote products
      20                 :            :  *    derived from this software without specific prior written permission.
      21                 :            :  *
      22                 :            :  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
      23                 :            :  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
      24                 :            :  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
      25                 :            :  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
      26                 :            :  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
      27                 :            :  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
      28                 :            :  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
      29                 :            :  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
      30                 :            :  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
      31                 :            :  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
      32                 :            :  */
      33                 :            : 
      34                 :            : #include "defs.h"
      35                 :            : 
      36                 :            : #ifdef HAVE_STRUCT_USER_DESC
      37                 :            : 
      38                 :            : # include <asm/ldt.h>
      39                 :            : 
      40                 :            : void
      41                 :          2 : print_user_desc(struct tcb *const tcp, const kernel_ulong_t addr)
      42                 :            : {
      43                 :            :         struct user_desc desc;
      44                 :            : 
      45         [ -  + ]:          2 :         if (umove_or_printaddr(tcp, addr, &desc))
      46                 :          0 :                 return;
      47                 :            : 
      48                 :          2 :         tprintf("{entry_number:%d, "
      49                 :            :                 "base_addr:%#08x, "
      50                 :            :                 "limit:%d, "
      51                 :            :                 "seg_32bit:%d, "
      52                 :            :                 "contents:%d, "
      53                 :            :                 "read_exec_only:%d, "
      54                 :            :                 "limit_in_pages:%d, "
      55                 :            :                 "seg_not_present:%d, "
      56                 :            :                 "useable:%d}",
      57                 :            :                 desc.entry_number,
      58                 :            :                 desc.base_addr,
      59                 :            :                 desc.limit,
      60                 :          2 :                 desc.seg_32bit,
      61                 :          2 :                 desc.contents,
      62                 :          2 :                 desc.read_exec_only,
      63                 :          2 :                 desc.limit_in_pages,
      64                 :          2 :                 desc.seg_not_present,
      65                 :          2 :                 desc.useable);
      66                 :            : }
      67                 :            : 
      68                 :          0 : SYS_FUNC(modify_ldt)
      69                 :            : {
      70                 :          0 :         tprintf("%" PRI_kld ", ", tcp->u_arg[0]);
      71         [ #  # ]:          0 :         if (tcp->u_arg[2] != sizeof(struct user_desc))
      72                 :          0 :                 printaddr(tcp->u_arg[1]);
      73                 :            :         else
      74                 :          0 :                 print_user_desc(tcp, tcp->u_arg[1]);
      75                 :          0 :         tprintf(", %" PRI_klu, tcp->u_arg[2]);
      76                 :            : 
      77                 :          0 :         return RVAL_DECODED;
      78                 :            : }
      79                 :            : 
      80                 :          4 : SYS_FUNC(set_thread_area)
      81                 :            : {
      82         [ +  + ]:          4 :         if (entering(tcp)) {
      83                 :          2 :                 print_user_desc(tcp, tcp->u_arg[0]);
      84                 :            :         } else {
      85                 :            :                 struct user_desc desc;
      86                 :            : 
      87         [ +  - ]:          4 :                 if (!verbose(tcp) || syserror(tcp) ||
           [ +  -  +  - ]
      88                 :          2 :                     umove(tcp, tcp->u_arg[0], &desc) < 0) {
      89                 :            :                         /* returned entry_number is not available */
      90                 :            :                 } else {
      91                 :            :                         static char outstr[32];
      92                 :            : 
      93                 :          2 :                         sprintf(outstr, "entry_number:%d", desc.entry_number);
      94                 :          2 :                         tcp->auxstr = outstr;
      95                 :          2 :                         return RVAL_STR;
      96                 :            :                 }
      97                 :            :         }
      98                 :          2 :         return 0;
      99                 :            : }
     100                 :            : 
     101                 :          0 : SYS_FUNC(get_thread_area)
     102                 :            : {
     103         [ #  # ]:          0 :         if (exiting(tcp))
     104                 :          0 :                 print_user_desc(tcp, tcp->u_arg[0]);
     105                 :          0 :         return 0;
     106                 :            : }
     107                 :            : 
     108                 :            : #endif /* HAVE_STRUCT_USER_DESC */
     109                 :            : 
     110                 :            : #if defined(M68K) || defined(MIPS)
     111                 :            : SYS_FUNC(set_thread_area)
     112                 :            : {
     113                 :            :         printaddr(tcp->u_arg[0]);
     114                 :            : 
     115                 :            :         return RVAL_DECODED;
     116                 :            : 
     117                 :            : }
     118                 :            : #endif
     119                 :            : 
     120                 :            : #if defined(M68K)
     121                 :            : SYS_FUNC(get_thread_area)
     122                 :            : {
     123                 :            :         return RVAL_DECODED | RVAL_HEX;
     124                 :            : }
     125                 :            : #endif