| * Stack trace management functions |
| * Copyright (C) 2007 Atmel Corporation |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 as |
| * published by the Free Software Foundation. |
| #include <linux/stacktrace.h> |
| #include <linux/thread_info.h> |
| #include <linux/module.h> |
| register unsigned long current_frame_pointer asm("r7"); |
| * Save stack-backtrace addresses into a stack_trace buffer. |
| void save_stack_trace(struct stack_trace *trace) |
| struct stackframe *frame; |
| low = (unsigned long)task_stack_page(current); |
| high = low + THREAD_SIZE; |
| fp = current_frame_pointer; |
| while (fp >= low && fp <= (high - 8)) { |
| frame = (struct stackframe *)fp; |
| trace->entries[trace->nr_entries++] = frame->lr; |
| if (trace->nr_entries >= trace->max_entries) |
| * The next frame must be at a higher address than the |
| EXPORT_SYMBOL_GPL(save_stack_trace); |