1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Copyright (C) 2001 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
4 * Copyright (C) 2013 Richard Weinberger <richrd@nod.at>
5 */
6
7 #include <linux/kallsyms.h>
8 #include <linux/kernel.h>
9 #include <linux/module.h>
10 #include <linux/sched.h>
11 #include <linux/sched/debug.h>
12 #include <linux/sched/task_stack.h>
13
14 #include <asm/stacktrace.h>
15 #include <os.h>
16
_print_addr(void * data,unsigned long address,int reliable)17 static void _print_addr(void *data, unsigned long address, int reliable)
18 {
19 const char *loglvl = data;
20
21 printk("%s [<%08lx>] %s%pS\n", loglvl, address, reliable ? "" : "? ",
22 (void *)address);
23 }
24
25 static const struct stacktrace_ops stackops = {
26 .address = _print_addr
27 };
28
show_stack(struct task_struct * task,unsigned long * stack,const char * loglvl)29 void show_stack(struct task_struct *task, unsigned long *stack,
30 const char *loglvl)
31 {
32 struct pt_regs *segv_regs = current->thread.segv_regs;
33 int i;
34
35 if (!stack)
36 stack = get_stack_pointer(task, segv_regs);
37
38 printk("%sStack:\n", loglvl);
39 for (i = 0; i < 3 * STACKSLOTS_PER_LINE; i++) {
40 if (kstack_end(stack))
41 break;
42 if (i && ((i % STACKSLOTS_PER_LINE) == 0))
43 pr_cont("\n");
44 pr_cont(" %08lx", READ_ONCE_NOCHECK(*stack));
45 stack++;
46 }
47
48 printk("%sCall Trace:\n", loglvl);
49 dump_trace(task ?: current, &stackops, (void *)loglvl);
50 }
51