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 <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 pr_info(" [<%08lx>]", address); 21 pr_cont(" %s", reliable ? "" : "? "); 22 print_symbol("%s", address); 23 pr_cont("\n"); 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 { 32 unsigned long *sp = stack; 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 sp = get_stack_pointer(task, segv_regs); 44 45 pr_info("Stack:\n"); 46 stack = sp; 47 for (i = 0; i < 3 * STACKSLOTS_PER_LINE; i++) { 48 if (kstack_end(stack)) 49 break; 50 if (i && ((i % STACKSLOTS_PER_LINE) == 0)) 51 pr_cont("\n"); 52 pr_cont(" %08lx", *stack++); 53 } 54 pr_cont("\n"); 55 56 pr_info("Call Trace:\n"); 57 dump_trace(current, &stackops, NULL); 58 pr_info("\n"); 59 } 60