1 /* 2 * Copyright (c) 1993 Ulrich Pegelow <pegelow (at) moorea.uni-muenster.de> 3 * Copyright (c) 1993 Branko Lankester <branko (at) hacktic.nl> 4 * Copyright (c) 1993, 1994, 1995, 1996 Rick Sladkey <jrs (at) world.std.com> 5 * Copyright (c) 1996-1999 Wichert Akkerman <wichert (at) cistron.nl> 6 * Copyright (c) 2003-2006 Roland McGrath <roland (at) redhat.com> 7 * Copyright (c) 2006-2015 Dmitry V. Levin <ldv (at) altlinux.org> 8 * Copyright (c) 2015-2017 The strace developers. 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_SYS_SHM_H 37 # include <sys/shm.h> 38 #elif defined HAVE_LINUX_SHM_H 39 # include <linux/shm.h> 40 #endif 41 42 #ifndef SHM_HUGE_SHIFT 43 # define SHM_HUGE_SHIFT 26 44 #endif 45 46 #ifndef SHM_HUGE_MASK 47 # define SHM_HUGE_MASK 0x3f 48 #endif 49 50 #include "xlat/shm_resource_flags.h" 51 #include "xlat/shm_flags.h" 52 53 SYS_FUNC(shmget) 54 { 55 const int key = (int) tcp->u_arg[0]; 56 if (key) 57 tprintf("%#x", key); 58 else 59 tprints("IPC_PRIVATE"); 60 tprintf(", %" PRI_klu ", ", tcp->u_arg[1]); 61 62 unsigned int flags = tcp->u_arg[2] & ~0777; 63 const unsigned int mask = SHM_HUGE_MASK << SHM_HUGE_SHIFT; 64 const unsigned int hugetlb_value = flags & mask; 65 66 flags &= ~mask; 67 if (flags || !hugetlb_value) 68 printflags(shm_resource_flags, flags, NULL); 69 70 if (hugetlb_value) 71 tprintf("%s%u<<SHM_HUGE_SHIFT", 72 flags ? "|" : "", 73 hugetlb_value >> SHM_HUGE_SHIFT); 74 75 if (flags || hugetlb_value) 76 tprints("|"); 77 print_numeric_umode_t(tcp->u_arg[2] & 0777); 78 79 return RVAL_DECODED; 80 } 81 82 SYS_FUNC(shmat) 83 { 84 if (entering(tcp)) { 85 tprintf("%d, ", (int) tcp->u_arg[0]); 86 if (indirect_ipccall(tcp)) { 87 printaddr(tcp->u_arg[3]); 88 tprints(", "); 89 printflags(shm_flags, tcp->u_arg[1], "SHM_???"); 90 } else { 91 printaddr(tcp->u_arg[1]); 92 tprints(", "); 93 printflags(shm_flags, tcp->u_arg[2], "SHM_???"); 94 } 95 return 0; 96 } else { 97 if (syserror(tcp)) 98 return 0; 99 if (indirect_ipccall(tcp)) { 100 union { 101 uint64_t r64; 102 uint32_t r32; 103 } u; 104 if (umoven(tcp, tcp->u_arg[2], current_wordsize, &u) < 0) 105 return RVAL_NONE; 106 tcp->u_rval = (sizeof(u.r32) == current_wordsize) 107 ? u.r32 : u.r64; 108 } 109 return RVAL_HEX; 110 } 111 } 112 113 SYS_FUNC(shmdt) 114 { 115 printaddr(tcp->u_arg[indirect_ipccall(tcp) ? 3 : 0]); 116 return RVAL_DECODED; 117 } 118
