1 /* 2 * Copyright (c) 1991, 1992 Paul Kranenburg <pk (at) cs.few.eur.nl> 3 * Copyright (c) 1993 Branko Lankester <branko (at) hacktic.nl> 4 * Copyright (c) 1993-1996 Rick Sladkey <jrs (at) world.std.com> 5 * Copyright (c) 1996-1999 Wichert Akkerman <wichert (at) cistron.nl> 6 * Copyright (c) 2002-2004 Roland McGrath <roland (at) redhat.com> 7 * Copyright (c) 2010 Andreas Schwab <schwab (at) linux-m68k.org> 8 * Copyright (c) 2014-2015 Dmitry V. Levin <ldv (at) altlinux.org> 9 * Copyright (c) 2014-2017 The strace developers. 10 * All rights reserved. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. The name of the author may not be used to endorse or promote products 21 * derived from this software without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 24 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 25 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 26 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 27 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 28 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 29 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 30 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 31 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 32 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 33 */ 34 35 #include "defs.h" 36 37 #ifdef HAVE_STRUCT_USER_DESC 38 39 # include <asm/ldt.h> 40 41 void 42 print_user_desc(struct tcb *const tcp, const kernel_ulong_t addr) 43 { 44 struct user_desc desc; 45 46 if (umove_or_printaddr(tcp, addr, &desc)) 47 return; 48 49 tprintf("{entry_number:%d, " 50 "base_addr:%#08x, " 51 "limit:%d, " 52 "seg_32bit:%d, " 53 "contents:%d, " 54 "read_exec_only:%d, " 55 "limit_in_pages:%d, " 56 "seg_not_present:%d, " 57 "useable:%d}", 58 desc.entry_number, 59 desc.base_addr, 60 desc.limit, 61 desc.seg_32bit, 62 desc.contents, 63 desc.read_exec_only, 64 desc.limit_in_pages, 65 desc.seg_not_present, 66 desc.useable); 67 } 68 69 SYS_FUNC(modify_ldt) 70 { 71 tprintf("%" PRI_kld ", ", tcp->u_arg[0]); 72 if (tcp->u_arg[2] != sizeof(struct user_desc)) 73 printaddr(tcp->u_arg[1]); 74 else 75 print_user_desc(tcp, tcp->u_arg[1]); 76 tprintf(", %" PRI_klu, tcp->u_arg[2]); 77 78 return RVAL_DECODED; 79 } 80 81 SYS_FUNC(set_thread_area) 82 { 83 if (entering(tcp)) { 84 print_user_desc(tcp, tcp->u_arg[0]); 85 } else { 86 struct user_desc desc; 87 88 if (!verbose(tcp) || syserror(tcp) || 89 umove(tcp, tcp->u_arg[0], &desc) < 0) { 90 /* returned entry_number is not available */ 91 } else { 92 static char outstr[32]; 93 94 sprintf(outstr, "entry_number:%d", desc.entry_number); 95 tcp->auxstr = outstr; 96 return RVAL_STR; 97 } 98 } 99 return 0; 100 } 101 102 SYS_FUNC(get_thread_area) 103 { 104 if (exiting(tcp)) 105 print_user_desc(tcp, tcp->u_arg[0]); 106 return 0; 107 } 108 109 #endif /* HAVE_STRUCT_USER_DESC */ 110 111 #if defined(M68K) || defined(MIPS) 112 SYS_FUNC(set_thread_area) 113 { 114 printaddr(tcp->u_arg[0]); 115 116 return RVAL_DECODED; 117 118 } 119 #endif 120 121 #if defined(M68K) 122 SYS_FUNC(get_thread_area) 123 { 124 return RVAL_DECODED | RVAL_HEX; 125 } 126 #endif 127
