1 // SPDX-License-Identifier: GPL-2.0-only
3 * Stacktrace support for Hexagon
5 * Copyright (c) 2010-2011, The Linux Foundation. All rights reserved.
8 #include <linux/sched.h>
9 #include <linux/sched/task_stack.h>
10 #include <linux/stacktrace.h>
11 #include <linux/thread_info.h>
12 #include <linux/module.h>
20 * Save stack-backtrace addresses into a stack_trace buffer.
22 void save_stack_trace(struct stack_trace *trace)
24 unsigned long low, high;
26 struct stackframe *frame;
27 int skip = trace->skip;
29 low = (unsigned long)task_stack_page(current);
30 high = low + THREAD_SIZE;
31 fp = (unsigned long)__builtin_frame_address(0);
33 while (fp >= low && fp <= (high - sizeof(*frame))) {
34 frame = (struct stackframe *)fp;
39 trace->entries[trace->nr_entries++] = frame->rets;
40 if (trace->nr_entries >= trace->max_entries)
45 * The next frame must be at a higher address than the
48 low = fp + sizeof(*frame);
52 EXPORT_SYMBOL_GPL(save_stack_trace);