1 /* 2 * Copyright (c) 2002-2003 Roland McGrath <roland (at) redhat.com> 3 * Copyright (c) 2007-2008 Ulrich Drepper <drepper (at) redhat.com> 4 * Copyright (c) 2009 Andreas Schwab <schwab (at) redhat.com> 5 * Copyright (c) 2014-2015 Dmitry V. Levin <ldv (at) altlinux.org> 6 * Copyright (c) 2014-2017 The strace developers. 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. The name of the author may not be used to endorse or promote products 18 * derived from this software without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 21 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 22 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 23 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 24 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 25 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 29 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include "defs.h" 33 34 #ifndef FUTEX_PRIVATE_FLAG 35 # define FUTEX_PRIVATE_FLAG 128 36 #endif 37 #ifndef FUTEX_CLOCK_REALTIME 38 # define FUTEX_CLOCK_REALTIME 256 39 #endif 40 41 #include "xlat/futexops.h" 42 #include "xlat/futexwakeops.h" 43 #include "xlat/futexwakecmps.h" 44 45 SYS_FUNC(futex) 46 { 47 const kernel_ulong_t uaddr = tcp->u_arg[0]; 48 const int op = tcp->u_arg[1]; 49 const int cmd = op & 127; 50 const kernel_ulong_t timeout = tcp->u_arg[3]; 51 const kernel_ulong_t uaddr2 = tcp->u_arg[4]; 52 const unsigned int val = tcp->u_arg[2]; 53 const unsigned int val2 = tcp->u_arg[3]; 54 const unsigned int val3 = tcp->u_arg[5]; 55 const char *comment; 56 57 printaddr(uaddr); 58 tprints(", "); 59 printxval(futexops, op, "FUTEX_???"); 60 switch (cmd) { 61 case FUTEX_WAIT: 62 tprintf(", %u", val); 63 tprints(", "); 64 print_timespec(tcp, timeout); 65 break; 66 case FUTEX_LOCK_PI: 67 tprints(", "); 68 print_timespec(tcp, timeout); 69 break; 70 case FUTEX_WAIT_BITSET: 71 tprintf(", %u", val); 72 tprints(", "); 73 print_timespec(tcp, timeout); 74 tprintf(", %#x", val3); 75 break; 76 case FUTEX_WAKE_BITSET: 77 tprintf(", %u", val); 78 tprintf(", %#x", val3); 79 break; 80 case FUTEX_REQUEUE: 81 tprintf(", %u", val); 82 tprintf(", %u, ", val2); 83 printaddr(uaddr2); 84 break; 85 case FUTEX_CMP_REQUEUE: 86 case FUTEX_CMP_REQUEUE_PI: 87 tprintf(", %u", val); 88 tprintf(", %u, ", val2); 89 printaddr(uaddr2); 90 tprintf(", %u", val3); 91 break; 92 case FUTEX_WAKE_OP: 93 tprintf(", %u", val); 94 tprintf(", %u, ", val2); 95 printaddr(uaddr2); 96 tprints(", "); 97 if ((val3 >> 28) & 8) 98 tprints("FUTEX_OP_OPARG_SHIFT<<28|"); 99 comment = printxval(futexwakeops, (val3 >> 28) & 0x7, NULL) 100 ? NULL : "FUTEX_OP_???"; 101 tprints("<<28"); 102 tprints_comment(comment); 103 tprintf("|%#x<<12|", (val3 >> 12) & 0xfff); 104 comment = printxval(futexwakecmps, (val3 >> 24) & 0xf, NULL) 105 ? NULL : "FUTEX_OP_CMP_???"; 106 tprints("<<24"); 107 tprints_comment(comment); 108 tprintf("|%#x", val3 & 0xfff); 109 break; 110 case FUTEX_WAIT_REQUEUE_PI: 111 tprintf(", %u", val); 112 tprints(", "); 113 print_timespec(tcp, timeout); 114 tprints(", "); 115 printaddr(uaddr2); 116 break; 117 case FUTEX_FD: 118 case FUTEX_WAKE: 119 tprintf(", %u", val); 120 break; 121 case FUTEX_UNLOCK_PI: 122 case FUTEX_TRYLOCK_PI: 123 break; 124 default: 125 tprintf(", %u", val); 126 tprints(", "); 127 printaddr(timeout); 128 tprints(", "); 129 printaddr(uaddr2); 130 tprintf(", %#x", val3); 131 break; 132 } 133 134 return RVAL_DECODED; 135 } 136
