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Diffstat (limited to 'lib/stack_protector/stack_protector.c')
-rw-r--r-- | lib/stack_protector/stack_protector.c | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/lib/stack_protector/stack_protector.c b/lib/stack_protector/stack_protector.c new file mode 100644 index 000000000..ccf2af48b --- /dev/null +++ b/lib/stack_protector/stack_protector.c @@ -0,0 +1,54 @@ +/* + * Copyright (c) 2017, ARM Limited and Contributors. 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. + * + * Neither the name of ARM nor the names of its contributors may be used + * to endorse or promote products derived from this software without specific + * prior written permission. + * + * 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 HOLDER 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 <debug.h> +#include <platform.h> +#include <stdint.h> + +/* + * Canary value used by the compiler runtime checks to detect stack corruption. + * + * Force the canary to be in .data to allow predictable memory layout relatively + * to the stacks. + */ +u_register_t __attribute__((section(".data.stack_protector_canary"))) + __stack_chk_guard = (u_register_t) 3288484550995823360ULL; + +/* + * Function called when the stack's canary check fails, which means the stack + * was corrupted. It must not return. + */ +void __dead2 __stack_chk_fail(void) +{ +#if DEBUG + ERROR("Stack corruption detected\n"); +#endif + panic(); +} + |