| | 1 | /* |
| | 2 | * Copyright (c) 2008 Apple Computer, Inc. All rights reserved. |
| | 3 | * |
| | 4 | * %Begin-Header% |
| | 5 | * Redistribution and use in source and binary forms, with or without |
| | 6 | * modification, are permitted provided that the following conditions |
| | 7 | * are met: |
| | 8 | * 1. Redistributions of source code must retain the above copyright |
| | 9 | * notice, and the entire permission notice in its entirety, |
| | 10 | * including the disclaimer of warranties. |
| | 11 | * 2. Redistributions in binary form must reproduce the above copyright |
| | 12 | * notice, this list of conditions and the following disclaimer in the |
| | 13 | * documentation and/or other materials provided with the distribution. |
| | 14 | * 3. The name of the author may not be used to endorse or promote |
| | 15 | * products derived from this software without specific prior |
| | 16 | * written permission. |
| | 17 | * |
| | 18 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED |
| | 19 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| | 20 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, ALL OF |
| | 21 | * WHICH ARE HEREBY DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE |
| | 22 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| | 23 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT |
| | 24 | * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR |
| | 25 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
| | 26 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| | 27 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE |
| | 28 | * USE OF THIS SOFTWARE, EVEN IF NOT ADVISED OF THE POSSIBILITY OF SUCH |
| | 29 | * DAMAGE. |
| | 30 | * %End-Header% |
| | 31 | */ |
| | 32 | |
| | 33 | /******************************************************************************* |
| | 34 | * NOTE: This implementation of the stack check routines required by the GCC |
| | 35 | * -fstack-protector flag is only safe for kernel extensions. |
| | 36 | *******************************************************************************/ |
| | 37 | |
| | 38 | #include <sys/types.h> |
| | 39 | #include <sys/random.h> |
| | 40 | #include <kern/debug.h> |
| | 41 | |
| | 42 | long __stack_chk_guard[8]; |
| | 43 | void __stack_chk_fail(void); |
| | 44 | |
| | 45 | static void __guard_setup(void) __attribute__((constructor)); |
| | 46 | |
| | 47 | static void |
| | 48 | __guard_setup(void) |
| | 49 | { |
| | 50 | /* Cannot report failure. */ |
| | 51 | read_random(__stack_chk_guard, sizeof(__stack_chk_guard)); |
| | 52 | } |
| | 53 | |
| | 54 | void |
| | 55 | __stack_chk_fail(void) |
| | 56 | { |
| | 57 | panic("Kernel stack memory corruption detected"); |
| | 58 | } |
| | 59 | |
projects / apple / xnu.git / blame_incremental