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 pr_info(" [<%08lx>] %s%pS\n", address, reliable ? "" : "? ", 21 (void *)address); 22 } 23 24 static const struct stacktrace_ops stackops = { 25 .address = _print_addr 26 }; 27 28 void show_stack(struct task_struct *task, unsigned long *stack) 29 { 30 unsigned long *sp = stack; 31 struct pt_regs *segv_regs = current->thread.segv_regs; 32 int i; 33 34 if (!segv_regs && os_is_signal_stack()) { 35 pr_err("Received SIGSEGV in SIGSEGV handler," 36 " aborting stack trace!\n"); 37 return; 38 } 39 40 if (!stack) 41 sp = get_stack_pointer(task, segv_regs); 42 43 pr_info("Stack:\n"); 44 stack = sp; 45 for (i = 0; i < 3 * STACKSLOTS_PER_LINE; i++) { 46 if (kstack_end(stack)) 47 break; 48 if (i && ((i % STACKSLOTS_PER_LINE) == 0)) 49 pr_cont("\n"); 50 pr_cont(" %08lx", *stack++); 51 } 52 pr_cont("\n"); 53 54 pr_info("Call Trace:\n"); 55 dump_trace(current, &stackops, NULL); 56 pr_info("\n"); 57 } 58