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);