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authorSoby Mathew <soby.mathew@arm.com>2014-04-07 15:28:55 +0100
committerSoby Mathew <soby.mathew@arm.com>2014-05-16 14:51:00 +0100
commita43d431b80541ea436b71f967c5749babf978c7a (patch)
tree15bbb0525b219f28bd9907bc77b9fd8391723caa /include/common
parentc5c9b69c132c823aabc1e29c2ff6f30323c85483 (diff)
downloadarm-trusted-firmware-a43d431b80541ea436b71f967c5749babf978c7a.tar.gz
Rework BL3-1 unhandled exception handling and reporting
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 The original intention of exception stack is no longer valid since we intend to support several valid exceptions like IRQ and FIQ in the trusted firmware context.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
Diffstat (limited to 'include/common')
-rw-r--r--include/common/debug.h17
1 files changed, 11 insertions, 6 deletions
diff --git a/include/common/debug.h b/include/common/debug.h
index e4fa31e..522b4df 100644
--- a/include/common/debug.h
+++ b/include/common/debug.h
@@ -56,11 +56,16 @@
/* For the moment this Panic function is very basic, Report an error and
* spin. This can be expanded in the future to provide more information.
*/
-static inline void __attribute__((noreturn)) panic(void)
-{
- ERROR("PANIC\n");
- while (1)
- ;
-}
+#if DEBUG
+extern void __dead2 do_panic(const char *file, int line);
+#define panic() do_panic(__FILE__, __LINE__)
+
+#else
+extern void __dead2 do_panic(void);
+#define panic() do_panic()
+
+#endif
+
+extern void print_string_value(char *s, unsigned long *mem);
#endif /* __DEBUG_H__ */