1 /* 2 * Copyright (C) 2001 Jeff Dike (jdike@karaya.com) 3 * Licensed under the GPL 4 */ 5 6 #include "linux/sched.h" 7 #include "linux/kernel.h" 8 #include "linux/module.h" 9 #include "linux/kallsyms.h" 10 #include "asm/page.h" 11 #include "asm/processor.h" 12 #include "sysrq.h" 13 14 /* Catch non-i386 SUBARCH's. */ 15 #if !defined(CONFIG_UML_X86) || defined(CONFIG_64BIT) 16 void show_trace(struct task_struct *task, unsigned long * stack) 17 { 18 unsigned long addr; 19 20 if (!stack) { 21 stack = (unsigned long*) &stack; 22 WARN_ON(1); 23 } 24 25 printk("Call Trace: \n"); 26 while (((long) stack & (THREAD_SIZE-1)) != 0) { 27 addr = *stack; 28 if (__kernel_text_address(addr)) { 29 printk("%08lx: [<%08lx>]", (unsigned long) stack, addr); 30 print_symbol(" %s", addr); 31 printk("\n"); 32 } 33 stack++; 34 } 35 printk("\n"); 36 } 37 #endif 38 39 /* 40 * stack dumps generator - this is used by arch-independent code. 41 * And this is identical to i386 currently. 42 */ 43 void dump_stack(void) 44 { 45 unsigned long stack; 46 47 show_trace(current, &stack); 48 } 49 EXPORT_SYMBOL(dump_stack); 50 51 /*Stolen from arch/i386/kernel/traps.c */ 52 static const int kstack_depth_to_print = 24; 53 54 /* This recently started being used in arch-independent code too, as in 55 * kernel/sched.c.*/ 56 void show_stack(struct task_struct *task, unsigned long *esp) 57 { 58 unsigned long *stack; 59 int i; 60 61 if (esp == NULL) { 62 if (task != current && task != NULL) { 63 esp = (unsigned long *) KSTK_ESP(task); 64 } else { 65 esp = (unsigned long *) &esp; 66 } 67 } 68 69 stack = esp; 70 for(i = 0; i < kstack_depth_to_print; i++) { 71 if (kstack_end(stack)) 72 break; 73 if (i && ((i % 8) == 0)) 74 printk("\n "); 75 printk("%08lx ", *stack++); 76 } 77 78 printk("Call Trace: \n"); 79 show_trace(task, esp); 80 } 81