1 // SPDX-License-Identifier: GPL-2.0
2 // Copyright (C) 2005-2017 Andes Technology Corporation
4 #include <linux/sched/debug.h>
5 #include <linux/sched/task_stack.h>
6 #include <linux/stacktrace.h>
8 void save_stack_trace(struct stack_trace *trace)
10 save_stack_trace_tsk(current, trace);
12 EXPORT_SYMBOL_GPL(save_stack_trace);
14 void save_stack_trace_tsk(struct task_struct *tsk, struct stack_trace *trace)
17 int skip = trace->skip;
21 __asm__ __volatile__("\tori\t%0, $fp, #0\n":"=r"(fpn));
24 fpn = (unsigned long *)thread_saved_fp(tsk);
28 while (!kstack_end(fpn) && !((unsigned long)fpn & 0x3)
29 && (fpn >= (unsigned long *)TASK_SIZE)) {
30 unsigned long lpp, fpp;
34 if (!__kernel_text_address(lpp))
37 if (savesched || !in_sched_functions(lpp)) {
41 trace->entries[trace->nr_entries++] = lpp;
42 if (trace->nr_entries >= trace->max_entries)
46 fpn = (unsigned long *)fpp;
49 EXPORT_SYMBOL_GPL(save_stack_trace_tsk);