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https://github.com/ARM-software/arm-trusted-firmware.git
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a43d431b80
This patch implements the register reporting when unhandled exceptions are taken in BL3-1. Unhandled exceptions will result in a dump of registers to the console, before halting execution by that CPU. The Crash Stack, previously called the Exception Stack, is used for this activity. This stack is used to preserve the CPU context and runtime stack contents for debugging and analysis. This also introduces the per_cpu_ptr_cache, referenced by tpidr_el3, to provide easy access to some of BL3-1 per-cpu data structures. Initially, this is used to provide a pointer to the Crash stack. panic() now prints the the error file and line number in Debug mode and prints the PC value in release mode. The Exception Stack is renamed to Crash Stack with this patch. The original intention of exception stack is no longer valid since we intend to support several valid exceptions like IRQ and FIQ in the trusted firmware context. This stack is now utilized for dumping and reporting the system state when a crash happens and hence the rename. Fixes ARM-software/tf-issues#79 Improve reporting of unhandled exception Change-Id: I260791dc05536b78547412d147193cdccae7811a
71 lines
2.6 KiB
C
71 lines
2.6 KiB
C
/*
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* Copyright (c) 2013-2014, ARM Limited and Contributors. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* Neither the name of ARM nor the names of its contributors may be used
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* to endorse or promote products derived from this software without specific
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* prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef __DEBUG_H__
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#define __DEBUG_H__
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#include <stdio.h>
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/* If building the project with DEBUG disabled the INFO and WARN macros
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* won't produce any output. The ERROR macro is always enabled.
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* The format expected is the same as for printf().
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* INFO("Info %s.\n", "message") -> INFO: Info message.
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* WARN("Warning %s.\n", "message") -> WARN: Warning message.
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* ERROR("Error %s.\n", "message") -> ERROR: Error message.
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*
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* TODO : add debug levels.
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*/
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#if DEBUG
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#define INFO(...) printf("INFO: " __VA_ARGS__)
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#define WARN(...) printf("WARN: " __VA_ARGS__)
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#else
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#define INFO(...)
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#define WARN(...)
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#endif
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#define ERROR(...) printf("ERROR: " __VA_ARGS__)
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/* For the moment this Panic function is very basic, Report an error and
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* spin. This can be expanded in the future to provide more information.
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*/
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#if DEBUG
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extern void __dead2 do_panic(const char *file, int line);
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#define panic() do_panic(__FILE__, __LINE__)
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#else
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extern void __dead2 do_panic(void);
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#define panic() do_panic()
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#endif
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extern void print_string_value(char *s, unsigned long *mem);
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#endif /* __DEBUG_H__ */
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