1*51faada7SDouglas Raillard /* 2*51faada7SDouglas Raillard * Copyright (c) 2017, ARM Limited and Contributors. All rights reserved. 3*51faada7SDouglas Raillard * 4*51faada7SDouglas Raillard * Redistribution and use in source and binary forms, with or without 5*51faada7SDouglas Raillard * modification, are permitted provided that the following conditions are met: 6*51faada7SDouglas Raillard * 7*51faada7SDouglas Raillard * Redistributions of source code must retain the above copyright notice, this 8*51faada7SDouglas Raillard * list of conditions and the following disclaimer. 9*51faada7SDouglas Raillard * 10*51faada7SDouglas Raillard * Redistributions in binary form must reproduce the above copyright notice, 11*51faada7SDouglas Raillard * this list of conditions and the following disclaimer in the documentation 12*51faada7SDouglas Raillard * and/or other materials provided with the distribution. 13*51faada7SDouglas Raillard * 14*51faada7SDouglas Raillard * Neither the name of ARM nor the names of its contributors may be used 15*51faada7SDouglas Raillard * to endorse or promote products derived from this software without specific 16*51faada7SDouglas Raillard * prior written permission. 17*51faada7SDouglas Raillard * 18*51faada7SDouglas Raillard * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 19*51faada7SDouglas Raillard * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20*51faada7SDouglas Raillard * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21*51faada7SDouglas Raillard * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 22*51faada7SDouglas Raillard * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23*51faada7SDouglas Raillard * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24*51faada7SDouglas Raillard * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25*51faada7SDouglas Raillard * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26*51faada7SDouglas Raillard * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27*51faada7SDouglas Raillard * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 28*51faada7SDouglas Raillard * POSSIBILITY OF SUCH DAMAGE. 29*51faada7SDouglas Raillard */ 30*51faada7SDouglas Raillard #include <debug.h> 31*51faada7SDouglas Raillard #include <platform.h> 32*51faada7SDouglas Raillard #include <stdint.h> 33*51faada7SDouglas Raillard 34*51faada7SDouglas Raillard /* 35*51faada7SDouglas Raillard * Canary value used by the compiler runtime checks to detect stack corruption. 36*51faada7SDouglas Raillard * 37*51faada7SDouglas Raillard * Force the canary to be in .data to allow predictable memory layout relatively 38*51faada7SDouglas Raillard * to the stacks. 39*51faada7SDouglas Raillard */ 40*51faada7SDouglas Raillard u_register_t __attribute__((section(".data.stack_protector_canary"))) 41*51faada7SDouglas Raillard __stack_chk_guard = (u_register_t) 3288484550995823360ULL; 42*51faada7SDouglas Raillard 43*51faada7SDouglas Raillard /* 44*51faada7SDouglas Raillard * Function called when the stack's canary check fails, which means the stack 45*51faada7SDouglas Raillard * was corrupted. It must not return. 46*51faada7SDouglas Raillard */ 47*51faada7SDouglas Raillard void __dead2 __stack_chk_fail(void) 48*51faada7SDouglas Raillard { 49*51faada7SDouglas Raillard #if DEBUG 50*51faada7SDouglas Raillard ERROR("Stack corruption detected\n"); 51*51faada7SDouglas Raillard #endif 52*51faada7SDouglas Raillard panic(); 53*51faada7SDouglas Raillard } 54*51faada7SDouglas Raillard 55