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Diffstat (limited to 'arch/xtensa/kernel/traps.c')
-rw-r--r--arch/xtensa/kernel/traps.c18
1 files changed, 14 insertions, 4 deletions
diff --git a/arch/xtensa/kernel/traps.c b/arch/xtensa/kernel/traps.c
index 5caf2b64d43a..01e0111bf787 100644
--- a/arch/xtensa/kernel/traps.c
+++ b/arch/xtensa/kernel/traps.c
@@ -293,6 +293,17 @@ do_debug(struct pt_regs *regs)
}
+/* Set exception C handler - for temporary use when probing exceptions */
+
+void * __init trap_set_handler(int cause, void *handler)
+{
+ unsigned long *entry = &exc_table[EXC_TABLE_DEFAULT / 4 + cause];
+ void *previous = (void *)*entry;
+ *entry = (unsigned long)handler;
+ return previous;
+}
+
+
/*
* Initialize dispatch tables.
*
@@ -397,7 +408,8 @@ static inline void spill_registers(void)
"wsr a13, sar\n\t"
"wsr a14, ps\n\t"
:: "a" (&a0), "a" (&ps)
- : "a2", "a3", "a4", "a7", "a11", "a12", "a13", "a14", "a15", "memory");
+ : "a2", "a3", "a4", "a7", "a11", "a12", "a13", "a14", "a15",
+ "memory");
}
void show_trace(struct task_struct *task, unsigned long *sp)
@@ -452,7 +464,7 @@ void show_stack(struct task_struct *task, unsigned long *sp)
if (!sp)
sp = stack_pointer(task);
- stack = sp;
+ stack = sp;
printk("\nStack: ");
@@ -523,5 +535,3 @@ void die(const char * str, struct pt_regs * regs, long err)
do_exit(err);
}
-
-