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 #include "user_util.h" 14 15 void show_trace(unsigned long * stack) 16 { 17 /* XXX: Copy the CONFIG_FRAME_POINTER stack-walking backtrace from 18 * arch/i386/kernel/traps.c, and then move this to sys-i386/sysrq.c.*/ 19 unsigned long addr; 20 21 if (!stack) { 22 stack = (unsigned long*) &stack; 23 WARN_ON(1); 24 } 25 26 printk("Call Trace: \n"); 27 while (((long) stack & (THREAD_SIZE-1)) != 0) { 28 addr = *stack; 29 if (__kernel_text_address(addr)) { 30 printk("%08lx: [<%08lx>]", (unsigned long) stack, addr); 31 print_symbol(" %s", addr); 32 printk("\n"); 33 } 34 stack++; 35 } 36 printk("\n"); 37 } 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(&stack); 48 } 49 EXPORT_SYMBOL(dump_stack); 50 51 /*Stolen from arch/i386/kernel/traps.c */ 52 static 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) { 63 esp = (unsigned long *) KSTK_ESP(task); 64 /* Which one? No actual difference - just coding style.*/ 65 //esp = (unsigned long *) PT_REGS_IP(&task->thread.regs); 66 } else { 67 esp = (unsigned long *) &esp; 68 } 69 } 70 71 stack = esp; 72 for(i = 0; i < kstack_depth_to_print; i++) { 73 if (kstack_end(stack)) 74 break; 75 if (i && ((i % 8) == 0)) 76 printk("\n "); 77 printk("%08lx ", *stack++); 78 } 79 80 show_trace(esp); 81 } 82