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/*
* Copyright (c) 1991, 1992 Paul Kranenburg <pk@cs.few.eur.nl>
* Copyright (c) 1993 Branko Lankester <branko@hacktic.nl>
* Copyright (c) 1993-1996 Rick Sladkey <jrs@world.std.com>
* Copyright (c) 1996-1999 Wichert Akkerman <wichert@cistron.nl>
* Copyright (c) 2001 John Hughes <john@Calva.COM>
* Copyright (c) 2013 Denys Vlasenko <vda.linux@googlemail.com>
* Copyright (c) 2011-2015 Dmitry V. Levin <ldv@strace.io>
* Copyright (c) 2015 Elvira Khabirova <lineprinter0@gmail.com>
* Copyright (c) 2015-2022 The strace developers.
* All rights reserved.
*
* SPDX-License-Identifier: LGPL-2.1-or-later
*/
#include "defs.h"
#include DEF_MPERS_TYPE(siginfo_t)
#include <signal.h>
#include <linux/audit.h>
#include MPERS_DEFS
#ifndef IN_MPERS
# include "printsiginfo.h"
#endif
#define XLAT_MACROS_ONLY
/* For xlat/audit_arch.h */
# include "xlat/elf_em.h"
#undef XLAT_MACROS_ONLY
#include "xlat/audit_arch.h"
#include "xlat/sigbus_codes.h"
#include "xlat/sigchld_codes.h"
#include "xlat/sigfpe_codes.h"
#include "xlat/sigill_codes.h"
#include "xlat/siginfo_codes.h"
#include "xlat/sigpoll_codes.h"
#include "xlat/sigprof_codes.h"
#include "xlat/sigsegv_codes.h"
#include "xlat/sigsys_codes.h"
#include "xlat/sigtrap_codes.h"
#ifdef ALPHA
# include "xlat/alpha_trap_codes.h"
#endif
#ifdef SIGEMT
# include "xlat/sigemt_codes.h"
#endif
#ifdef HAVE_SIGINFO_T_SI_PERF_FLAGS
# include "xlat/sigtrap_perf_flags.h"
#endif
#ifndef SI_FROMUSER
# define SI_FROMUSER(sip) ((sip)->si_code <= 0)
#endif
static void
printsigsource(struct tcb *tcp, const siginfo_t *sip)
{
tprint_struct_next();
PRINT_FIELD_TGID(*sip, si_pid, tcp);
tprint_struct_next();
PRINT_FIELD_ID(*sip, si_uid);
}
static void
printsigval(const siginfo_t *sip)
{
tprint_struct_next();
PRINT_FIELD_D(*sip, si_int);
tprint_struct_next();
PRINT_FIELD_PTR(*sip, si_ptr);
}
static void
print_si_code(const unsigned int si_code, const int si_signo)
{
static const struct xlat * const si_codes[] = {
[SIGTRAP] = sigtrap_codes,
[SIGCHLD] = sigchld_codes,
[SIGIO] = sigpoll_codes, /* SIGPOLL */
[SIGPROF] = sigprof_codes,
[SIGILL] = sigill_codes,
#ifdef SIGEMT
[SIGEMT] = sigemt_codes,
#endif
[SIGFPE] = sigfpe_codes,
[SIGSEGV] = sigsegv_codes,
[SIGBUS] = sigbus_codes,
[SIGSYS] = sigsys_codes,
};
const char *code = xlookup(siginfo_codes, si_code);
if (!code && (unsigned int) si_signo < ARRAY_SIZE(si_codes)
&& si_codes[si_signo])
code = xlookup(si_codes[si_signo], si_code);
print_xlat_ex(si_code, code, XLAT_STYLE_DEFAULT);
}
static void
print_si_info(struct tcb *tcp, const siginfo_t *sip)
{
if (sip->si_errno) {
tprint_struct_next();
PRINT_FIELD_ERR_U(*sip, si_errno);
}
if (SI_FROMUSER(sip)) {
switch (sip->si_code) {
case SI_USER:
printsigsource(tcp, sip);
break;
case SI_TKILL:
printsigsource(tcp, sip);
break;
#if defined HAVE_SIGINFO_T_SI_TIMERID && defined HAVE_SIGINFO_T_SI_OVERRUN
case SI_TIMER:
tprint_struct_next();
PRINT_FIELD_X(*sip, si_timerid);
tprint_struct_next();
PRINT_FIELD_D(*sip, si_overrun);
printsigval(sip);
break;
#endif
case SI_SIGIO:
tprint_struct_next();
PRINT_FIELD_D(*sip, si_band);
tprint_struct_next();
PRINT_FIELD_FD(*sip, si_fd, tcp);
break;
default:
printsigsource(tcp, sip);
if (sip->si_ptr)
printsigval(sip);
break;
}
} else {
switch (sip->si_signo) {
case SIGCHLD:
printsigsource(tcp, sip);
if (sip->si_code == CLD_EXITED) {
tprint_struct_next();
PRINT_FIELD_D(*sip, si_status);
} else {
tprint_struct_next();
PRINT_FIELD_OBJ_VAL(*sip, si_status, printsignal);
}
tprint_struct_next();
PRINT_FIELD_CLOCK_T(*sip, si_utime);
tprint_struct_next();
PRINT_FIELD_CLOCK_T(*sip, si_stime);
break;
case SIGILL:
tprint_struct_next();
PRINT_FIELD_PTR(*sip, si_addr);
#if defined(SPARC) || defined(SPARC64)
tprint_struct_next();
PRINT_FIELD_D(*sip, si_trapno);
#endif /* SPARC || SPARC64 */
break;
case SIGFPE:
tprint_struct_next();
PRINT_FIELD_PTR(*sip, si_addr);
#if defined ALPHA && defined HAVE_SIGINFO_T_SI_TRAPNO
tprint_struct_next();
PRINT_FIELD_XVAL_D(*sip, si_trapno, alpha_trap_codes,
"GEN_???");
#endif /* ALPHA */
break;
case SIGBUS:
tprint_struct_next();
PRINT_FIELD_PTR(*sip, si_addr);
#if !defined(BUS_OPFETCH) && defined(HAVE_SIGINFO_T_SI_ADDR_LSB)
switch (sip->si_code) {
case BUS_MCEERR_AR:
case BUS_MCEERR_AO:
tprint_struct_next();
PRINT_FIELD_X(*sip, si_addr_lsb);
break;
}
#endif /* !BUS_OPFETCH && HAVE_SIGINFO_T_SI_ADDR_LSB */
break;
case SIGSEGV:
tprint_struct_next();
PRINT_FIELD_PTR(*sip, si_addr);
#if (!defined(SEGV_STACKFLOW) && defined(HAVE_SIGINFO_T_SI_LOWER)) \
|| (!defined(__SEGV_PSTKOVF) && defined(HAVE_SIGINFO_T_SI_PKEY))
switch (sip->si_code) {
# if !defined(SEGV_STACKFLOW) && defined(HAVE_SIGINFO_T_SI_LOWER)
case SEGV_BNDERR:
tprint_struct_next();
PRINT_FIELD_PTR(*sip, si_lower);
tprint_struct_next();
PRINT_FIELD_PTR(*sip, si_upper);
break;
# endif /* !SEGV_STACKFLOW && HAVE_SIGINFO_T_SI_LOWER */
# if !defined(__SEGV_PSTKOVF) && defined(HAVE_SIGINFO_T_SI_PKEY)
case SEGV_PKUERR:
tprint_struct_next();
PRINT_FIELD_U(*sip, si_pkey);
break;
# endif /* !__SEGV_PSTKOVF && HAVE_SIGINFO_T_SI_PKEY */
}
#endif /* !SEGV_STACKFLOW && HAVE_SIGINFO_T_SI_LOWER
* || !__SEGV_PSTKOVF && HAVE_SIGINFO_T_SI_PKEY */
break;
case SIGTRAP:
tprint_struct_next();
PRINT_FIELD_PTR(*sip, si_addr);
#if (defined ALPHA && defined HAVE_SIGINFO_T_SI_TRAPNO) \
|| defined HAVE_SIGINFO_T_SI_PERF_DATA
switch (sip->si_code) {
# if defined ALPHA && defined HAVE_SIGINFO_T_SI_TRAPNO
case TRAP_UNK:
tprint_struct_next();
PRINT_FIELD_XVAL_D(*sip, si_trapno,
alpha_trap_codes, "GEN_???");
break;
# endif /* ALPHA && HAVE_SIGINFO_T_SI_TRAPNO */
# ifdef HAVE_SIGINFO_T_SI_PERF_DATA
case TRAP_PERF:
tprint_struct_next();
PRINT_FIELD_X(*sip, si_perf_data);
# ifdef HAVE_SIGINFO_T_SI_PERF_TYPE
tprint_struct_next();
PRINT_FIELD_XVAL(*sip, si_perf_type,
perf_type_id, "PERF_TYPE_???");
# endif /* HAVE_SIGINFO_T_SI_PERF_TYPE */
# ifdef HAVE_SIGINFO_T_SI_PERF_FLAGS
tprint_struct_next();
PRINT_FIELD_FLAGS(*sip, si_perf_flags,
sigtrap_perf_flags,
"TRAP_PERF_FLAG_???");
# endif /* HAVE_SIGINFO_T_SI_PERF_FLAGS */
# endif /* HAVE_SIGINFO_T_SI_PERF_DATA */
}
#endif /* ALPHA || HAVE_SIGINFO_T_SI_PERF_DATA */
break;
#ifdef SIGEMT
case SIGEMT:
tprint_struct_next();
PRINT_FIELD_PTR(*sip, si_addr);
break;
#endif
case SIGIO: /* SIGPOLL */
switch (sip->si_code) {
case POLL_IN: case POLL_OUT: case POLL_MSG:
case POLL_ERR: case POLL_PRI: case POLL_HUP:
tprint_struct_next();
PRINT_FIELD_D(*sip, si_band);
tprint_struct_next();
PRINT_FIELD_FD(*sip, si_fd, tcp);
break;
}
break;
#ifdef HAVE_SIGINFO_T_SI_SYSCALL
case SIGSYS:
tprint_struct_next();
PRINT_FIELD_PTR(*sip, si_call_addr);
tprint_struct_next();
PRINT_FIELD_SYSCALL_NAME(*sip, si_syscall,
sip->si_arch);
tprint_struct_next();
PRINT_FIELD_XVAL(*sip, si_arch, audit_arch,
"AUDIT_ARCH_???");
break;
#endif
default:
if (sip->si_pid || sip->si_uid)
printsigsource(tcp, sip);
if (sip->si_ptr)
printsigval(sip);
}
}
}
#ifdef IN_MPERS
static
#endif
void
printsiginfo(struct tcb *tcp, const siginfo_t *sip)
{
tprint_struct_begin();
if (sip->si_signo) {
PRINT_FIELD_OBJ_VAL(*sip, si_signo, printsignal);
tprint_struct_next();
PRINT_FIELD_OBJ_VAL(*sip, si_code, print_si_code,
sip->si_signo);
#ifdef SI_NOINFO
if (sip->si_code != SI_NOINFO)
#endif
print_si_info(tcp, sip);
}
tprint_struct_end();
}
MPERS_PRINTER_DECL(void, printsiginfo_at,
struct tcb *const tcp, const kernel_ulong_t addr)
{
siginfo_t si;
if (!umove_or_printaddr(tcp, addr, &si))
printsiginfo(tcp, &si);
}
static bool
print_siginfo_t(struct tcb *tcp, void *elem_buf, size_t elem_size, void *data)
{
printsiginfo(tcp, (const siginfo_t *) elem_buf);
return true;
}
MPERS_PRINTER_DECL(void, print_siginfo_array, struct tcb *const tcp,
const kernel_ulong_t addr, const kernel_ulong_t len)
{
siginfo_t si;
print_array(tcp, addr, len, &si, sizeof(si),
tfetch_mem, print_siginfo_t, 0);
}
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