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) 2005-2015 Dmitry V. Levin <ldv (at) altlinux.org> 7 * Copyright (c) 2015 Elvira Khabirova <lineprinter0 (at) gmail.com> 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 #include DEF_MPERS_TYPE(stack_t) 37 38 #include <signal.h> 39 40 #include MPERS_DEFS 41 42 #include "xlat/sigaltstack_flags.h" 43 44 static void 45 print_stack_t(struct tcb *const tcp, const kernel_ulong_t addr) 46 { 47 stack_t ss; 48 49 if (umove_or_printaddr(tcp, addr, &ss)) 50 return; 51 52 tprints("{ss_sp="); 53 printaddr(ptr_to_kulong(ss.ss_sp)); 54 tprints(", ss_flags="); 55 printflags(sigaltstack_flags, ss.ss_flags, "SS_???"); 56 tprintf(", ss_size=%" PRI_klu "}", (kernel_ulong_t) ss.ss_size); 57 } 58 59 SYS_FUNC(sigaltstack) 60 { 61 if (entering(tcp)) { 62 print_stack_t(tcp, tcp->u_arg[0]); 63 tprints(", "); 64 } else { 65 print_stack_t(tcp, tcp->u_arg[1]); 66 } 67 return 0; 68 } 69
