1 /* 2 * Copyright (C) 2001 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com) 3 * Copyright (C) 2013 Richard Weinberger <[email protected]> 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 16 #include <asm/sysrq.h> 17 #include <asm/stacktrace.h> 18 #include <os.h> 19 20 static void _print_addr(void *data, unsigned long address, int reliable) 21 { 22 pr_info(" [<%08lx>]", address); 23 pr_cont(" %s", reliable ? "" : "? "); 24 print_symbol("%s", address); 25 pr_cont("\n"); 26 } 27 28 static const struct stacktrace_ops stackops = { 29 .address = _print_addr 30 }; 31 32 void show_stack(struct task_struct *task, unsigned long *stack) 33 { 34 unsigned long *sp = stack; 35 struct pt_regs *segv_regs = current->thread.segv_regs; 36 int i; 37 38 if (!segv_regs && os_is_signal_stack()) { 39 pr_err("Received SIGSEGV in SIGSEGV handler," 40 " aborting stack trace!\n"); 41 return; 42 } 43 44 if (!stack) 45 sp = get_stack_pointer(task, segv_regs); 46 47 pr_info("Stack:\n"); 48 stack = sp; 49 for (i = 0; i < 3 * STACKSLOTS_PER_LINE; i++) { 50 if (kstack_end(stack)) 51 break; 52 if (i && ((i % STACKSLOTS_PER_LINE) == 0)) 53 pr_cont("\n"); 54 pr_cont(" %08lx", *stack++); 55 } 56 pr_cont("\n"); 57 58 pr_info("Call Trace:\n"); 59 dump_trace(current, &stackops, NULL); 60 pr_info("\n"); 61 } 62