2 * Blackfin stacktrace code (mostly copied from avr32)
4 * Copyright 2009 Analog Devices Inc.
5 * Licensed under the GPL-2 or later.
8 #include <linux/sched.h>
9 #include <linux/stacktrace.h>
10 #include <linux/thread_info.h>
11 #include <linux/module.h>
13 register unsigned long current_frame_pointer
asm("FP");
21 * Save stack-backtrace addresses into a stack_trace buffer.
23 void save_stack_trace(struct stack_trace
*trace
)
25 unsigned long low
, high
;
27 struct stackframe
*frame
;
28 int skip
= trace
->skip
;
30 low
= (unsigned long)task_stack_page(current
);
31 high
= low
+ THREAD_SIZE
;
32 fp
= current_frame_pointer
;
34 while (fp
>= low
&& fp
<= (high
- sizeof(*frame
))) {
35 frame
= (struct stackframe
*)fp
;
40 trace
->entries
[trace
->nr_entries
++] = frame
->rets
;
41 if (trace
->nr_entries
>= trace
->max_entries
)
46 * The next frame must be at a higher address than the
49 low
= fp
+ sizeof(*frame
);
53 EXPORT_SYMBOL_GPL(save_stack_trace
);
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