1 /* 2 * Copyright (C) 2001 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com) 3 * Copyright (C) 2013 Richard Weinberger <richrd@nod.at> 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License version 2 as 7 * published by the Free Software Foundation. 8 */ 9 10 #include <linux/kallsyms.h> 11 #include <linux/kernel.h> 12 #include <linux/module.h> 13 #include <linux/sched.h> 14 #include <linux/sched/debug.h> 15 #include <linux/sched/task_stack.h> 16 17 #include <asm/sysrq.h> 18 #include <asm/stacktrace.h> 19 #include <os.h> 20 21 static void _print_addr(void *data, unsigned long address, int reliable) 22 { 23 pr_info(" [<%08lx>] %s%pS\n", address, reliable ? "" : "? ", 24 (void *)address); 25 } 26 27 static const struct stacktrace_ops stackops = { 28 .address = _print_addr 29 }; 30 31 void show_stack(struct task_struct *task, unsigned long *stack) 32 { 33 unsigned long *sp = stack; 34 struct pt_regs *segv_regs = current->thread.segv_regs; 35 int i; 36 37 if (!segv_regs && os_is_signal_stack()) { 38 pr_err("Received SIGSEGV in SIGSEGV handler," 39 " aborting stack trace!\n"); 40 return; 41 } 42 43 if (!stack) 44 sp = get_stack_pointer(task, segv_regs); 45 46 pr_info("Stack:\n"); 47 stack = sp; 48 for (i = 0; i < 3 * STACKSLOTS_PER_LINE; i++) { 49 if (kstack_end(stack)) 50 break; 51 if (i && ((i % STACKSLOTS_PER_LINE) == 0)) 52 pr_cont("\n"); 53 pr_cont(" %08lx", *stack++); 54 } 55 pr_cont("\n"); 56 57 pr_info("Call Trace:\n"); 58 dump_trace(current, &stackops, NULL); 59 pr_info("\n"); 60 } 61