projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 65bc6093 MS |
1 | /* |
| 2 | * Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu> | |
| 3 | * Copyright (C) 2007-2009 PetaLogix | |
| 4 | * Copyright (C) 2006 Atmark Techno, Inc. | |
| 5 | * | |
| 6 | * This file is subject to the terms and conditions of the GNU General Public | |
| 7 | * License. See the file "COPYING" in the main directory of this archive | |
| 8 | * for more details. | |
| 9 | */ | |
| 10 | ||
| 11 | #include <linux/kernel.h> | |
| 12 | #include <linux/kallsyms.h> | |
| 13 | #include <linux/module.h> | |
| 14 | #include <linux/sched.h> | |
| 15 | #include <linux/debug_locks.h> | |
| 16 | ||
| 17 | #include <asm/exceptions.h> | |
| 18 | #include <asm/system.h> | |
| 19 | ||
| 20 | void trap_init(void) | |
| 21 | { | |
| 22 | __enable_hw_exceptions(); | |
| 23 | } | |
| 24 | ||
| 0c4ec16b | 25 | static unsigned long kstack_depth_to_print = 24; |
| 65bc6093 MS |
26 | |
| 27 | static int __init kstack_setup(char *s) | |
| 28 | { | |
| 0c4ec16b | 29 | return !strict_strtoul(s, 0, &kstack_depth_to_print); |
| 65bc6093 MS |
30 | } |
| 31 | __setup("kstack=", kstack_setup); | |
| 32 | ||
| 33 | void show_trace(struct task_struct *task, unsigned long *stack) | |
| 34 | { | |
| 35 | unsigned long addr; | |
| 36 | ||
| 37 | if (!stack) | |
| 38 | stack = (unsigned long *)&stack; | |
| 39 | ||
| 40 | printk(KERN_NOTICE "Call Trace: "); | |
| 41 | #ifdef CONFIG_KALLSYMS | |
| 42 | printk(KERN_NOTICE "\n"); | |
| 43 | #endif | |
| 44 | while (!kstack_end(stack)) { | |
| 45 | addr = *stack++; | |
| 46 | /* | |
| 47 | * If the address is either in the text segment of the | |
| 48 | * kernel, or in the region which contains vmalloc'ed | |
| 49 | * memory, it *may* be the address of a calling | |
| 50 | * routine; if so, print it so that someone tracing | |
| 51 | * down the cause of the crash will be able to figure | |
| 52 | * out the call path that was taken. | |
| 53 | */ | |
| 54 | if (kernel_text_address(addr)) | |
| 55 | print_ip_sym(addr); | |
| 56 | } | |
| 57 | printk(KERN_NOTICE "\n"); | |
| 58 | ||
| 59 | if (!task) | |
| 60 | task = current; | |
| 61 | ||
| 62 | debug_show_held_locks(task); | |
| 63 | } | |
| 64 | ||
| 65 | void show_stack(struct task_struct *task, unsigned long *sp) | |
| 66 | { | |
| 67 | unsigned long *stack; | |
| 68 | int i; | |
| 69 | ||
| 70 | if (sp == NULL) { | |
| 71 | if (task) | |
| 72 | sp = (unsigned long *) ((struct thread_info *) | |
| 73 | (task->stack))->cpu_context.r1; | |
| 74 | else | |
| 75 | sp = (unsigned long *)&sp; | |
| 76 | } | |
| 77 | ||
| 78 | stack = sp; | |
| 79 | ||
| 80 | printk(KERN_INFO "\nStack:\n "); | |
| 81 | ||
| 82 | for (i = 0; i < kstack_depth_to_print; i++) { | |
| 83 | if (kstack_end(sp)) | |
| 84 | break; | |
| 85 | if (i && ((i % 8) == 0)) | |
| 86 | printk("\n "); | |
| 87 | printk("%08lx ", *sp++); | |
| 88 | } | |
| 89 | printk("\n"); | |
| 90 | show_trace(task, stack); | |
| 91 | } | |
| 92 | ||
| 93 | void dump_stack(void) | |
| 94 | { | |
| 95 | show_stack(NULL, NULL); | |
| 96 | } | |
| 97 | EXPORT_SYMBOL(dump_stack); | |
| 17f3324c MS |
98 | |
| 99 | #ifdef CONFIG_MMU | |
| 100 | void __bug(const char *file, int line, void *data) | |
| 101 | { | |
| 102 | if (data) | |
| 103 | printk(KERN_CRIT "kernel BUG at %s:%d (data = %p)!\n", | |
| 104 | file, line, data); | |
| 105 | else | |
| 106 | printk(KERN_CRIT "kernel BUG at %s:%d!\n", file, line); | |
| 107 | ||
| 108 | machine_halt(); | |
| 109 | } | |
| 110 | ||
| 111 | int bad_trap(int trap_num, struct pt_regs *regs) | |
| 112 | { | |
| 113 | printk(KERN_CRIT | |
| 114 | "unimplemented trap %d called at 0x%08lx, pid %d!\n", | |
| 115 | trap_num, regs->pc, current->pid); | |
| 116 | return -ENOSYS; | |
| 117 | } | |
| 118 | ||
| 119 | int debug_trap(struct pt_regs *regs) | |
| 120 | { | |
| 121 | int i; | |
| 122 | printk(KERN_CRIT "debug trap\n"); | |
| 123 | for (i = 0; i < 32; i++) { | |
| 124 | /* printk("r%i:%08X\t",i,regs->gpr[i]); */ | |
| 125 | if ((i % 4) == 3) | |
| 126 | printk(KERN_CRIT "\n"); | |
| 127 | } | |
| 128 | printk(KERN_CRIT "pc:%08lX\tmsr:%08lX\n", regs->pc, regs->msr); | |
| 129 | return -ENOSYS; | |
| 130 | } | |
| 131 | #endif |