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