266 lines
6.6 KiB
C
266 lines
6.6 KiB
C
/*
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* Copyright (c) 1991, 1992 Paul Kranenburg <pk@cs.few.eur.nl>
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* Copyright (c) 1993 Branko Lankester <branko@hacktic.nl>
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* Copyright (c) 1993-1996 Rick Sladkey <jrs@world.std.com>
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* Copyright (c) 1996-1999 Wichert Akkerman <wichert@cistron.nl>
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* Copyright (c) 2001 John Hughes <john@Calva.COM>
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* Copyright (c) 2013 Denys Vlasenko <vda.linux@googlemail.com>
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* Copyright (c) 2011-2015 Dmitry V. Levin <ldv@altlinux.org>
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* Copyright (c) 2015 Elvira Khabirova <lineprinter0@gmail.com>
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* Copyright (c) 2015-2017 The strace developers.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "defs.h"
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#include DEF_MPERS_TYPE(siginfo_t)
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#include <signal.h>
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#include <linux/audit.h>
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#include MPERS_DEFS
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#ifndef IN_MPERS
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#include "printsiginfo.h"
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#endif
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#include "xlat/audit_arch.h"
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#include "xlat/sigbus_codes.h"
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#include "xlat/sigchld_codes.h"
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#include "xlat/sigfpe_codes.h"
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#include "xlat/sigill_codes.h"
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#include "xlat/siginfo_codes.h"
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#include "xlat/sigpoll_codes.h"
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#include "xlat/sigprof_codes.h"
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#include "xlat/sigsegv_codes.h"
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#include "xlat/sigsys_codes.h"
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#include "xlat/sigtrap_codes.h"
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#ifdef SIGEMT
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# include "xlat/sigemt_codes.h"
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#endif
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#ifndef SI_FROMUSER
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# define SI_FROMUSER(sip) ((sip)->si_code <= 0)
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#endif
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static void
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printsigsource(const siginfo_t *sip)
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{
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tprintf(", si_pid=%u, si_uid=%u",
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(unsigned int) sip->si_pid,
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(unsigned int) sip->si_uid);
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}
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static void
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printsigval(const siginfo_t *sip)
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{
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tprintf(", si_value={int=%d, ptr=", sip->si_int);
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printaddr(ptr_to_kulong(sip->si_ptr));
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tprints("}");
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}
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static void
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print_si_code(int si_signo, unsigned int si_code)
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{
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const char *code = xlookup(siginfo_codes, si_code);
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if (!code) {
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switch (si_signo) {
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case SIGTRAP:
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code = xlookup(sigtrap_codes, si_code);
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break;
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case SIGCHLD:
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code = xlookup(sigchld_codes, si_code);
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break;
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case SIGPOLL:
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code = xlookup(sigpoll_codes, si_code);
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break;
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case SIGPROF:
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code = xlookup(sigprof_codes, si_code);
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break;
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case SIGILL:
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code = xlookup(sigill_codes, si_code);
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break;
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#ifdef SIGEMT
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case SIGEMT:
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code = xlookup(sigemt_codes, si_code);
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break;
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#endif
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case SIGFPE:
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code = xlookup(sigfpe_codes, si_code);
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break;
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case SIGSEGV:
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code = xlookup(sigsegv_codes, si_code);
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break;
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case SIGBUS:
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code = xlookup(sigbus_codes, si_code);
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break;
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case SIGSYS:
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code = xlookup(sigsys_codes, si_code);
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break;
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}
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}
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if (code)
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tprints(code);
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else
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tprintf("%#x", si_code);
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}
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static void
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print_si_info(const siginfo_t *sip)
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{
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if (sip->si_errno) {
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tprints(", si_errno=");
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if ((unsigned) sip->si_errno < nerrnos
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&& errnoent[sip->si_errno])
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tprints(errnoent[sip->si_errno]);
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else
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tprintf("%d", sip->si_errno);
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}
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if (SI_FROMUSER(sip)) {
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switch (sip->si_code) {
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case SI_USER:
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printsigsource(sip);
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break;
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case SI_TKILL:
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printsigsource(sip);
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break;
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#if defined HAVE_SIGINFO_T_SI_TIMERID && defined HAVE_SIGINFO_T_SI_OVERRUN
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case SI_TIMER:
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tprintf(", si_timerid=%#x, si_overrun=%d",
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sip->si_timerid, sip->si_overrun);
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printsigval(sip);
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break;
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#endif
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default:
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printsigsource(sip);
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if (sip->si_ptr)
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printsigval(sip);
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break;
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}
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} else {
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switch (sip->si_signo) {
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case SIGCHLD:
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printsigsource(sip);
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tprints(", si_status=");
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if (sip->si_code == CLD_EXITED)
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tprintf("%d", sip->si_status);
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else
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printsignal(sip->si_status);
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tprintf(", si_utime=%llu, si_stime=%llu",
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zero_extend_signed_to_ull(sip->si_utime),
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zero_extend_signed_to_ull(sip->si_stime));
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break;
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case SIGILL: case SIGFPE:
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case SIGSEGV: case SIGBUS:
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tprints(", si_addr=");
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printaddr(ptr_to_kulong(sip->si_addr));
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break;
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case SIGPOLL:
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switch (sip->si_code) {
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case POLL_IN: case POLL_OUT: case POLL_MSG:
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tprintf(", si_band=%ld",
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(long) sip->si_band);
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break;
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}
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break;
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#ifdef HAVE_SIGINFO_T_SI_SYSCALL
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case SIGSYS: {
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const char *scname =
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syscall_name((unsigned) sip->si_syscall);
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tprints(", si_call_addr=");
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printaddr(ptr_to_kulong(sip->si_call_addr));
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tprints(", si_syscall=");
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if (scname)
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tprintf("__NR_%s", scname);
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else
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tprintf("%u", (unsigned) sip->si_syscall);
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tprints(", si_arch=");
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printxval(audit_arch, sip->si_arch, "AUDIT_ARCH_???");
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break;
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}
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#endif
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default:
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if (sip->si_pid || sip->si_uid)
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printsigsource(sip);
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if (sip->si_ptr)
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printsigval(sip);
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}
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}
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}
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#ifdef IN_MPERS
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static
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#endif
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void
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printsiginfo(const siginfo_t *sip)
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{
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if (sip->si_signo == 0) {
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tprints("{}");
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return;
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}
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tprints("{si_signo=");
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printsignal(sip->si_signo);
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tprints(", si_code=");
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print_si_code(sip->si_signo, sip->si_code);
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#ifdef SI_NOINFO
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if (sip->si_code != SI_NOINFO)
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#endif
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print_si_info(sip);
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tprints("}");
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}
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MPERS_PRINTER_DECL(void, printsiginfo_at,
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struct tcb *const tcp, const kernel_ulong_t addr)
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{
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siginfo_t si;
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if (!umove_or_printaddr(tcp, addr, &si))
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printsiginfo(&si);
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}
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static bool
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print_siginfo_t(struct tcb *tcp, void *elem_buf, size_t elem_size, void *data)
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{
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printsiginfo((const siginfo_t *) elem_buf);
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return true;
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}
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MPERS_PRINTER_DECL(void, print_siginfo_array, struct tcb *const tcp,
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const kernel_ulong_t addr, const kernel_ulong_t len)
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{
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siginfo_t si;
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print_array(tcp, addr, len, &si, sizeof(si),
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umoven_or_printaddr, print_siginfo_t, 0);
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}
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