| /* |
| * Copyright (C) 2012 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 <sys/cdefs.h> |
| |
| /* |
| __stack_chk_fail routine is runtime part of stack protector compiler |
| feature. It's implemented in libc and represents die routine when stack |
| corruption is detected. |
| |
| Calls are generated by compiler and injected into user functions when |
| -fstack-protector* options are used. |
| |
| __stack_chk_fail_local is wrapper for __stack_chk_fail. Compiler generates |
| wrapper calls instead for PIC code only and only on IA32 for optimization |
| purpose (see gcc/config/i386/i386.c). Wrapper body is always included into |
| executable or library. This is the idea of optimization. |
| |
| Glibc is doing this via libc_nonshared.a which is linked automatically |
| everytime with libc.so. In bionic we have to bring it within crtfiles |
| because libc.so is real library and not a link script like libc.so at glibc. |
| |
| For x86_64 or non-PIC code compiler always generates __stack_chk_fail calls. |
| */ |
| |
| #ifdef __i386__ |
| extern void __stack_chk_fail(); |
| |
| __LIBC_HIDDEN__ void __stack_chk_fail_local() { |
| __stack_chk_fail(); |
| } |
| #endif |