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Diffstat (limited to 'gcc-4.6/libssp/ssp.c')
| -rw-r--r-- | gcc-4.6/libssp/ssp.c | 186 |
1 files changed, 0 insertions, 186 deletions
diff --git a/gcc-4.6/libssp/ssp.c b/gcc-4.6/libssp/ssp.c deleted file mode 100644 index aaa5a322c..000000000 --- a/gcc-4.6/libssp/ssp.c +++ /dev/null @@ -1,186 +0,0 @@ -/* Stack protector support. - Copyright (C) 2005, 2009 Free Software Foundation, Inc. - -This file is part of GCC. - -GCC is free software; you can redistribute it and/or modify it under -the terms of the GNU General Public License as published by the Free -Software Foundation; either version 3, or (at your option) any later -version. - -In addition to the permissions in the GNU General Public License, the -Free Software Foundation gives you unlimited permission to link the -compiled version of this file into combinations with other programs, -and to distribute those combinations without any restriction coming -from the use of this file. (The General Public License restrictions -do apply in other respects; for example, they cover modification of -the file, and distribution when not linked into a combine -executable.) - -GCC is distributed in the hope that it will be useful, but WITHOUT ANY -WARRANTY; without even the implied warranty of MERCHANTABILITY or -FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License -for more details. - -Under Section 7 of GPL version 3, you are granted additional -permissions described in the GCC Runtime Library Exception, version -3.1, as published by the Free Software Foundation. - -You should have received a copy of the GNU General Public License and -a copy of the GCC Runtime Library Exception along with this program; -see the files COPYING3 and COPYING.RUNTIME respectively. If not, see -<http://www.gnu.org/licenses/>. */ - - -#include "config.h" -#ifdef HAVE_ALLOCA_H -# include <alloca.h> -#endif -#ifdef HAVE_MALLOC_H -# include <malloc.h> -#endif -#ifdef HAVE_STRING_H -# include <string.h> -#endif -#ifdef HAVE_UNISTD_H -# include <unistd.h> -#endif -#ifdef HAVE_FCNTL_H -# include <fcntl.h> -#endif -#ifdef HAVE_PATHS_H -# include <paths.h> -#endif -#ifndef _PATH_TTY -/* Native win32 apps don't know about /dev/tty but can print directly - to the console using "CONOUT$" */ -#if defined (_WIN32) && !defined (__CYGWIN__) -# define _PATH_TTY "CONOUT$" -#else -# define _PATH_TTY "/dev/tty" -#endif -#endif -#ifdef HAVE_SYSLOG_H -# include <syslog.h> -#endif - -void *__stack_chk_guard = 0; - -static void __attribute__ ((constructor)) -__guard_setup (void) -{ - unsigned char *p; - int fd; - - if (__stack_chk_guard != 0) - return; - - fd = open ("/dev/urandom", O_RDONLY); - if (fd != -1) - { - ssize_t size = read (fd, &__stack_chk_guard, - sizeof (__stack_chk_guard)); - close (fd); - if (size == sizeof(__stack_chk_guard) && __stack_chk_guard != 0) - return; - } - - /* If a random generator can't be used, the protector switches the guard - to the "terminator canary". */ - p = (unsigned char *) &__stack_chk_guard; - p[sizeof(__stack_chk_guard)-1] = 255; - p[sizeof(__stack_chk_guard)-2] = '\n'; - p[0] = 0; -} - -static void -fail (const char *msg1, size_t msg1len, const char *msg3) -{ -#ifdef __GNU_LIBRARY__ - extern char * __progname; -#else - static const char __progname[] = ""; -#endif - int fd; - - /* Print error message directly to the tty. This avoids Bad Things - happening if stderr is redirected. */ - fd = open (_PATH_TTY, O_WRONLY); - if (fd != -1) - { - static const char msg2[] = " terminated\n"; - size_t progname_len, len; - char *buf, *p; - - progname_len = strlen (__progname); - len = msg1len + progname_len + sizeof(msg2)-1 + 1; - p = buf = alloca (len); - - memcpy (p, msg1, msg1len); - p += msg1len; - memcpy (p, __progname, progname_len); - p += progname_len; - memcpy (p, msg2, sizeof(msg2)); - - while (len > 0) - { - ssize_t wrote = write (fd, buf, len); - if (wrote < 0) - break; - buf += wrote; - len -= wrote; - } - close (fd); - } - -#ifdef HAVE_SYSLOG_H - /* Only send the error to syslog if there was no tty available. */ - else - syslog (LOG_CRIT, msg3); -#endif /* HAVE_SYSLOG_H */ - - /* Try very hard to exit. Note that signals may be blocked preventing - the first two options from working. The use of volatile is here to - prevent optimizers from "knowing" that __builtin_trap is called first, - and that it doesn't return, and so "obviously" the rest of the code - is dead. */ - { - volatile int state; - for (state = 0; ; state++) - switch (state) - { - case 0: - __builtin_trap (); - break; - case 1: - *(volatile int *)-1L = 0; - break; - case 2: - _exit (127); - break; - } - } -} - -void -__stack_chk_fail (void) -{ - const char *msg = "*** stack smashing detected ***: "; - fail (msg, strlen (msg), "stack smashing detected: terminated"); -} - -void -__chk_fail (void) -{ - const char *msg = "*** buffer overflow detected ***: "; - fail (msg, strlen (msg), "buffer overflow detected: terminated"); -} - -#ifdef HAVE_HIDDEN_VISIBILITY -void -__attribute__((visibility ("hidden"))) -__stack_chk_fail_local (void) -{ - __stack_chk_fail (); -} -#endif |