diff options
Diffstat (limited to 'libc/bionic/ssp.c')
-rw-r--r-- | libc/bionic/ssp.c | 100 |
1 files changed, 0 insertions, 100 deletions
diff --git a/libc/bionic/ssp.c b/libc/bionic/ssp.c deleted file mode 100644 index 20794f4..0000000 --- a/libc/bionic/ssp.c +++ /dev/null @@ -1,100 +0,0 @@ -/* - * Copyright (C) 2008 The Android Open Source Project - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * * Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * * Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in - * the documentation and/or other materials provided with the - * distribution. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS - * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE - * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, - * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, - * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS - * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED - * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, - * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT - * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - */ -#include <stdio.h> -#include <stdlib.h> -#include <signal.h> -#include <string.h> -#include <unistd.h> -#include <fcntl.h> -#include <ctype.h> -#include "logd.h" - -void *__stack_chk_guard = 0; - -/* Initialize the canary with a random value from /dev/urandom. - * If that fails, use the "terminator canary". */ -static void __attribute__ ((constructor)) -__guard_setup(void) -{ - int fd; - - fd = open("/dev/urandom", O_RDONLY); - if (fd != -1) { - ssize_t len = read(fd, &__stack_chk_guard, - sizeof(__stack_chk_guard)); - close(fd); - if (len == sizeof(__stack_chk_guard)) - return; - } - - /* If that failed, switch to 'terminator canary' */ - ((unsigned char *)&__stack_chk_guard)[0] = 0; - ((unsigned char *)&__stack_chk_guard)[1] = 0; - ((unsigned char *)&__stack_chk_guard)[2] = '\n'; - ((unsigned char *)&__stack_chk_guard)[3] = 255; -} - -/* This is the crash handler. - * Does a best effort at logging and calls _exit to terminate - * the process immediately (without atexit handlers, etc.) */ -void __stack_chk_fail(void) -{ - struct sigaction sa; - sigset_t sigmask; - static const char message[] = "stack corruption detected: aborted"; - char path[PATH_MAX]; - int count; - - /* Immediately block all (but SIGABRT) signal handlers from running code */ - sigfillset(&sigmask); - sigdelset(&sigmask, SIGABRT); - sigprocmask(SIG_BLOCK, &sigmask, NULL); - - /* Use /proc/self/exe link to obtain the program name for logging - * purposes. If it's not available, we set it to "unknown" */ - if ((count = readlink("/proc/self/exe", path, sizeof(path) - 1)) == -1) { - strlcpy(path, "unknown", sizeof(path)); - } else { - path[count] = '\0'; - } - - /* Do a best effort at logging. This ends up calling writev(2) */ - __libc_android_log_print(ANDROID_LOG_FATAL, path, message); - - /* Make sure there is no default action for SIGABRT */ - bzero(&sa, sizeof(struct sigaction)); - sigemptyset(&sa.sa_mask); - sa.sa_flags = 0; - sa.sa_handler = SIG_DFL; - sigaction(SIGABRT, &sa, NULL); - - /* Terminate the process and exit immediately */ - kill(getpid(), SIGABRT); - - _exit(127); -} |