Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * linux/arch/h8300/boot/traps.c -- general exception handling code |
| 3 | * H8/300 support Yoshinori Sato <ysato@users.sourceforge.jp> |
| 4 | * |
| 5 | * Cloned from Linux/m68k. |
| 6 | * |
| 7 | * No original Copyright holder listed, |
Simon Arlott | 5e71c60 | 2007-10-20 01:10:46 +0200 | [diff] [blame] | 8 | * Probable original (C) Roman Zippel (assigned DJD, 1999) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 9 | * |
| 10 | * Copyright 1999-2000 D. Jeff Dionne, <jeff@rt-control.com> |
| 11 | * |
| 12 | * This file is subject to the terms and conditions of the GNU General Public |
| 13 | * License. See the file COPYING in the main directory of this archive |
| 14 | * for more details. |
| 15 | */ |
| 16 | |
| 17 | #include <linux/types.h> |
| 18 | #include <linux/sched.h> |
| 19 | #include <linux/kernel.h> |
| 20 | #include <linux/errno.h> |
| 21 | #include <linux/init.h> |
| 22 | #include <linux/module.h> |
| 23 | |
| 24 | #include <asm/system.h> |
| 25 | #include <asm/irq.h> |
| 26 | #include <asm/traps.h> |
| 27 | #include <asm/page.h> |
| 28 | #include <asm/gpio.h> |
| 29 | |
| 30 | /* |
| 31 | * this must be called very early as the kernel might |
| 32 | * use some instruction that are emulated on the 060 |
| 33 | */ |
| 34 | |
| 35 | void __init base_trap_init(void) |
| 36 | { |
| 37 | } |
| 38 | |
| 39 | void __init trap_init (void) |
| 40 | { |
| 41 | } |
| 42 | |
| 43 | asmlinkage void set_esp0 (unsigned long ssp) |
| 44 | { |
| 45 | current->thread.esp0 = ssp; |
| 46 | } |
| 47 | |
| 48 | /* |
| 49 | * Generic dumping code. Used for panic and debug. |
| 50 | */ |
| 51 | |
| 52 | static void dump(struct pt_regs *fp) |
| 53 | { |
| 54 | unsigned long *sp; |
| 55 | unsigned char *tp; |
| 56 | int i; |
| 57 | |
| 58 | printk("\nCURRENT PROCESS:\n\n"); |
| 59 | printk("COMM=%s PID=%d\n", current->comm, current->pid); |
| 60 | if (current->mm) { |
| 61 | printk("TEXT=%08x-%08x DATA=%08x-%08x BSS=%08x-%08x\n", |
| 62 | (int) current->mm->start_code, |
| 63 | (int) current->mm->end_code, |
| 64 | (int) current->mm->start_data, |
| 65 | (int) current->mm->end_data, |
| 66 | (int) current->mm->end_data, |
| 67 | (int) current->mm->brk); |
| 68 | printk("USER-STACK=%08x KERNEL-STACK=%08lx\n\n", |
| 69 | (int) current->mm->start_stack, |
| 70 | (int) PAGE_SIZE+(unsigned long)current); |
| 71 | } |
| 72 | |
| 73 | show_regs(fp); |
| 74 | printk("\nCODE:"); |
| 75 | tp = ((unsigned char *) fp->pc) - 0x20; |
| 76 | for (sp = (unsigned long *) tp, i = 0; (i < 0x40); i += 4) { |
| 77 | if ((i % 0x10) == 0) |
| 78 | printk("\n%08x: ", (int) (tp + i)); |
| 79 | printk("%08x ", (int) *sp++); |
| 80 | } |
| 81 | printk("\n"); |
| 82 | |
| 83 | printk("\nKERNEL STACK:"); |
| 84 | tp = ((unsigned char *) fp) - 0x40; |
| 85 | for (sp = (unsigned long *) tp, i = 0; (i < 0xc0); i += 4) { |
| 86 | if ((i % 0x10) == 0) |
| 87 | printk("\n%08x: ", (int) (tp + i)); |
| 88 | printk("%08x ", (int) *sp++); |
| 89 | } |
| 90 | printk("\n"); |
| 91 | if (STACK_MAGIC != *(unsigned long *)((unsigned long)current+PAGE_SIZE)) |
| 92 | printk("(Possibly corrupted stack page??)\n"); |
| 93 | |
| 94 | printk("\n\n"); |
| 95 | } |
| 96 | |
| 97 | void die_if_kernel (char *str, struct pt_regs *fp, int nr) |
| 98 | { |
| 99 | extern int console_loglevel; |
| 100 | |
| 101 | if (!(fp->ccr & PS_S)) |
| 102 | return; |
| 103 | |
| 104 | console_loglevel = 15; |
| 105 | dump(fp); |
| 106 | |
| 107 | do_exit(SIGSEGV); |
| 108 | } |
| 109 | |
| 110 | extern char _start, _etext; |
| 111 | #define check_kernel_text(addr) \ |
| 112 | ((addr >= (unsigned long)(&_start)) && \ |
| 113 | (addr < (unsigned long)(&_etext))) |
| 114 | |
| 115 | static int kstack_depth_to_print = 24; |
| 116 | |
| 117 | void show_stack(struct task_struct *task, unsigned long *esp) |
| 118 | { |
| 119 | unsigned long *stack, addr; |
| 120 | int i; |
| 121 | |
| 122 | if (esp == NULL) |
| 123 | esp = (unsigned long *) &esp; |
| 124 | |
| 125 | stack = esp; |
| 126 | |
| 127 | printk("Stack from %08lx:", (unsigned long)stack); |
| 128 | for (i = 0; i < kstack_depth_to_print; i++) { |
| 129 | if (((unsigned long)stack & (THREAD_SIZE - 1)) == 0) |
| 130 | break; |
| 131 | if (i % 8 == 0) |
| 132 | printk("\n "); |
| 133 | printk(" %08lx", *stack++); |
| 134 | } |
| 135 | |
| 136 | printk("\nCall Trace:"); |
| 137 | i = 0; |
| 138 | stack = esp; |
Yoshinori Sato | 8778beb | 2007-06-01 00:47:01 -0700 | [diff] [blame] | 139 | while (((unsigned long)stack & (THREAD_SIZE - 1)) != 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 140 | addr = *stack++; |
| 141 | /* |
| 142 | * If the address is either in the text segment of the |
| 143 | * kernel, or in the region which contains vmalloc'ed |
| 144 | * memory, it *may* be the address of a calling |
| 145 | * routine; if so, print it so that someone tracing |
| 146 | * down the cause of the crash will be able to figure |
| 147 | * out the call path that was taken. |
| 148 | */ |
| 149 | if (check_kernel_text(addr)) { |
| 150 | if (i % 4 == 0) |
| 151 | printk("\n "); |
| 152 | printk(" [<%08lx>]", addr); |
| 153 | i++; |
| 154 | } |
| 155 | } |
| 156 | printk("\n"); |
| 157 | } |
| 158 | |
| 159 | void show_trace_task(struct task_struct *tsk) |
| 160 | { |
| 161 | show_stack(tsk,(unsigned long *)tsk->thread.esp0); |
| 162 | } |
| 163 | |
| 164 | void dump_stack(void) |
| 165 | { |
| 166 | show_stack(NULL,NULL); |
| 167 | } |
| 168 | |
| 169 | EXPORT_SYMBOL(dump_stack); |