blob: 5a5ae9cd19e32f1543b2ff69ded69636b242e76f [file] [log] [blame]
/* Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
/* These header files need to be included before asm/siginfo.h such that
* pid_t, timer_t, and clock_t are defined. */
#include <stdlib.h>
#include <unistd.h>
#include <asm/siginfo.h>
#define __have_siginfo_t 1
#define __have_sigval_t 1
#define __have_sigevent_t 1
#include <signal.h>
#include <string.h>
#include "signal_handler.h"
#include "util.h"
struct local_sigsys {
void *ip;
int nr;
unsigned int arch;
void log_sigsys_handler(int nr, siginfo_t *info, void *void_context)
struct local_sigsys sigsys;
const char *syscall_name;
memcpy(&sigsys, &info->_sifields, sizeof(sigsys));
syscall_name = lookup_syscall_name(;
(void) void_context;
if (syscall_name)
die("blocked syscall: %s", syscall_name);
die("blocked syscall: %d", nr);
* We trapped on a syscall that should have killed the process.
* This should never ever return, but we're paranoid.
for (;;)
int install_sigsys_handler()
int ret = 0;
struct sigaction act;
sigset_t mask;
memset(&act, 0, sizeof(act));
act.sa_sigaction = &log_sigsys_handler;
act.sa_flags = SA_SIGINFO;
sigaddset(&mask, SIGSYS);
ret = sigaction(SIGSYS, &act, NULL);
if (ret < 0)
return ret;
ret = sigprocmask(SIG_UNBLOCK, &mask, NULL);
if (ret < 0)
return ret;
return 0;