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, regs: segv_regs); |
44 | |
45 | printk("%sStack:\n" , loglvl); |
46 | for (i = 0; i < 3 * STACKSLOTS_PER_LINE; i++) { |
47 | if (kstack_end(addr: 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 | |