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/sysrq.h>
15 #include <asm/stacktrace.h>
16 #include <os.h>
17
18 static void _print_addr(void *data, unsigned long address, int reliable)
19 {
20 const char *loglvl = data;
21
22 printk("%s [<%08lx>] %s%pS\n", loglvl, address, reliable ? "" : "? ",
23 (void *)address);
24 }
25
26 static const struct stacktrace_ops stackops = {
27 .address = _print_addr
28 };
29
30 void show_stack(struct task_struct *task, unsigned long *stack,
31 const char *loglvl)
32 {
33 struct pt_regs *segv_regs = current->thread.segv_regs;
34 int i;
35
36 if (!segv_regs && os_is_signal_stack()) {
37 pr_err("Received SIGSEGV in SIGSEGV handler,"
38 " aborting stack trace!\n");
39 return;
40 }
41
42 if (!stack)
43 stack = get_stack_pointer(task, segv_regs);
44
45 printk("%sStack:\n", loglvl);
46 for (i = 0; i < 3 * STACKSLOTS_PER_LINE; i++) {
47 if (kstack_end(stack))
48 break;
49 if (i && ((i % STACKSLOTS_PER_LINE) == 0))
50 pr_cont("\n");
51 pr_cont(" %08lx", READ_ONCE_NOCHECK(*stack));
52 stack++;
53 }
54
55 printk("%sCall Trace:\n", loglvl);
56 dump_trace(current, &stackops, (void *)loglvl);
57 }
58
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