mirror of
https://github.com/ARM-software/arm-trusted-firmware.git
synced 2025-04-17 10:04:26 +00:00
51faada71a
Introduce new build option ENABLE_STACK_PROTECTOR. It enables compilation of all BL images with one of the GCC -fstack-protector-* options. A new platform function plat_get_stack_protector_canary() is introduced. It returns a value that is used to initialize the canary for stack corruption detection. Returning a random value will prevent an attacker from predicting the value and greatly increase the effectiveness of the protection. A message is printed at the ERROR level when a stack corruption is detected. To be effective, the global data must be stored at an address lower than the base of the stacks. Failure to do so would allow an attacker to overwrite the canary as part of an attack which would void the protection. FVP implementation of plat_get_stack_protector_canary is weak as there is no real source of entropy on the FVP. It therefore relies on a timer's value, which could be predictable. Change-Id: Icaaee96392733b721fa7c86a81d03660d3c1bc06 Signed-off-by: Douglas Raillard <douglas.raillard@arm.com>
93 lines
3.1 KiB
C
93 lines
3.1 KiB
C
/*
|
|
* Copyright (c) 2013-2017, 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.
|
|
*/
|
|
|
|
#ifndef __DEBUG_H__
|
|
#define __DEBUG_H__
|
|
|
|
/* The log output macros print output to the console. These macros produce
|
|
* compiled log output only if the LOG_LEVEL defined in the makefile (or the
|
|
* make command line) is greater or equal than the level required for that
|
|
* type of log output.
|
|
* The format expected is the same as for printf(). For example:
|
|
* INFO("Info %s.\n", "message") -> INFO: Info message.
|
|
* WARN("Warning %s.\n", "message") -> WARNING: Warning message.
|
|
*/
|
|
|
|
#define LOG_LEVEL_NONE 0
|
|
#define LOG_LEVEL_ERROR 10
|
|
#define LOG_LEVEL_NOTICE 20
|
|
#define LOG_LEVEL_WARNING 30
|
|
#define LOG_LEVEL_INFO 40
|
|
#define LOG_LEVEL_VERBOSE 50
|
|
|
|
#ifndef __ASSEMBLY__
|
|
#include <stdio.h>
|
|
|
|
#if LOG_LEVEL >= LOG_LEVEL_NOTICE
|
|
# define NOTICE(...) tf_printf("NOTICE: " __VA_ARGS__)
|
|
#else
|
|
# define NOTICE(...)
|
|
#endif
|
|
|
|
#if LOG_LEVEL >= LOG_LEVEL_ERROR
|
|
# define ERROR(...) tf_printf("ERROR: " __VA_ARGS__)
|
|
#else
|
|
# define ERROR(...)
|
|
#endif
|
|
|
|
#if LOG_LEVEL >= LOG_LEVEL_WARNING
|
|
# define WARN(...) tf_printf("WARNING: " __VA_ARGS__)
|
|
#else
|
|
# define WARN(...)
|
|
#endif
|
|
|
|
#if LOG_LEVEL >= LOG_LEVEL_INFO
|
|
# define INFO(...) tf_printf("INFO: " __VA_ARGS__)
|
|
#else
|
|
# define INFO(...)
|
|
#endif
|
|
|
|
#if LOG_LEVEL >= LOG_LEVEL_VERBOSE
|
|
# define VERBOSE(...) tf_printf("VERBOSE: " __VA_ARGS__)
|
|
#else
|
|
# define VERBOSE(...)
|
|
#endif
|
|
|
|
|
|
void __dead2 do_panic(void);
|
|
#define panic() do_panic()
|
|
|
|
/* Function called when stack protection check code detects a corrupted stack */
|
|
void __dead2 __stack_chk_fail(void);
|
|
|
|
void tf_printf(const char *fmt, ...) __printflike(1, 2);
|
|
|
|
#endif /* __ASSEMBLY__ */
|
|
#endif /* __DEBUG_H__ */
|