420b631687
* xlat/ia64_siginfo_si_flags.in: New file. * printsiginfo.c [IA64]: Include xlat/ia64_siginfo_si_flags.h. [IA64] (print_si_info): Decode si_imm, si_flags, and si_isr fields for fault signals.
335 lines
8.8 KiB
C
335 lines
8.8 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) 2015-2018 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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#include "nr_prefix.c"
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#ifndef IN_MPERS
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#include "printsiginfo.h"
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#endif
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#define XLAT_MACROS_ONLY
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/* For xlat/audit_arch.h */
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# include "xlat/audit_arch_flags.h"
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# include "xlat/elf_em.h"
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#undef XLAT_MACROS_ONLY
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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 ALPHA
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# include <asm/gentrap.h>
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# include "xlat/alpha_gentrap.h"
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#endif /* ALPHA */
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#ifdef IA64
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# include "xlat/ia64_siginfo_si_flags.h"
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#endif
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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", (unsigned int) sip->si_pid);
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printuid(", si_uid=", (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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static const struct xlat * const si_codes[] = {
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[SIGTRAP] = sigtrap_codes,
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[SIGCHLD] = sigchld_codes,
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[SIGPOLL] = sigpoll_codes,
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[SIGPROF] = sigprof_codes,
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[SIGILL] = sigill_codes,
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#ifdef SIGEMT
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[SIGEMT] = sigemt_codes,
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#endif
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[SIGFPE] = sigfpe_codes,
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[SIGSEGV] = sigsegv_codes,
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[SIGBUS] = sigbus_codes,
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[SIGSYS] = sigsys_codes,
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};
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const char *code = xlookup(siginfo_codes, si_code);
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if (!code && (unsigned int) si_signo < ARRAY_SIZE(si_codes)
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&& si_codes[si_signo])
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code = xlookup(si_codes[si_signo], si_code);
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print_xlat_ex(si_code, code, XLAT_STYLE_DEFAULT);
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}
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static void
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print_scconst(unsigned scno)
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{
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/*
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* Note that we can safely use the personality set in
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* current_personality here (and don't have to guess it
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* based on X32_SYSCALL_BIT and si_arch, for example):
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* - The signal is delivered as a result of seccomp
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* filtering to the process executing forbidden
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* syscall.
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* - We have set the personality for the tracee during
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* the syscall entering.
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* - The current_personality is reliably switched in
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* the next_event routine, it is set to the
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* personality of the last call made (the one that
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* triggered the signal delivery).
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* - Looks like there are no other cases where SIGSYS
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* is delivered from the kernel so far.
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*/
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const char *scname = syscall_name(shuffle_scno(scno));
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if (!scname || xlat_verbose(xlat_verbosity) != XLAT_STYLE_ABBREV)
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tprintf("%u", scno);
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if (!scname || xlat_verbose(xlat_verbosity) == XLAT_STYLE_RAW)
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return;
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(xlat_verbose(xlat_verbosity) == XLAT_STYLE_ABBREV
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? tprintf : tprintf_comment)("%s%s",
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nr_prefix(scno), scname);
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}
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static void
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print_fasync_info(struct tcb *tcp, const siginfo_t *sip)
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{
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tprintf(", si_band=");
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if ((long) sip->si_band != -1L)
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printflags(pollflags, sip->si_band, "POLL???");
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else
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tprints("-1");
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tprints(", si_fd=");
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printfd(tcp, sip->si_fd);
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}
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static void
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print_si_info(struct tcb *tcp, 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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print_err(sip->si_errno, false);
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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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case SI_SIGIO:
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print_fasync_info(tcp, sip);
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break;
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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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case SIGTRAP:
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#ifdef SIGEMT
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case SIGEMT:
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#endif
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tprints(", si_addr=");
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printaddr(ptr_to_kulong(sip->si_addr));
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#ifdef HAVE_SIGINFO_T_SI_TRAPNO
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# if defined(SPARC)
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if ((sip->si_signo == SIGILL && sip->si_code == ILLTRP)
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|| sip->si_trapno)
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# elif defined(ALPHA)
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/*
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* See arch/alpha/kernel/traps.c:do_entIF, gentrap
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* handling, and arch/alpha/include/uapi/asm/gentrap.h
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*/
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if (sip->si_trapno
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|| sip->si_signo == SIGFPE
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|| (sip->si_signo == SIGTRAP
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&& sip->si_code == TRAP_UNK))
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# endif
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{
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tprints(", si_trapno=");
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# ifdef ALPHA
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printxval_d(alpha_gentraps, sip->si_trapno,
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sip->si_trapno ? "GEN_???" : NULL);
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# else /* !ALPHA */
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tprintf("%d")
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# endif ALPHA
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}
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#endif /* HAVE_SIGINFO_T_SI_TRAPNO */
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#ifdef IA64
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tprintf(", si_imm=%d", sip->si_imm);
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tprints(", si_flags=");
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printflags(ia64_siginfo_si_flags, sip->si_flags, NULL);
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if ((sip_si_flags & __ISR_VALID) || sip->si_isr)
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/* See also arch/ia64/include/asm/kregs.h */
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tprintf(", si_isr=%#lx", sip->si_isr);
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#endif
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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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case POLL_ERR: case POLL_PRI: case POLL_HUP:
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print_fasync_info(tcp, sip);
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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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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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print_scconst(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(struct tcb *tcp, 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(tcp, 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(tcp, &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(tcp, (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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tfetch_mem, print_siginfo_t, 0);
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}
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