Yoshinori Sato | 883251d | 2015-05-11 02:36:51 +0900 | [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, |
| 8 | * Probable original (C) Roman Zippel (assigned DJD, 1999) |
| 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 | #include <linux/bug.h> |
| 24 | |
| 25 | #include <asm/irq.h> |
| 26 | #include <asm/traps.h> |
| 27 | #include <asm/page.h> |
| 28 | |
| 29 | static DEFINE_SPINLOCK(die_lock); |
| 30 | |
| 31 | /* |
| 32 | * this must be called very early as the kernel might |
| 33 | * use some instruction that are emulated on the 060 |
| 34 | */ |
| 35 | |
| 36 | void __init base_trap_init(void) |
| 37 | { |
| 38 | } |
| 39 | |
| 40 | void __init trap_init(void) |
| 41 | { |
| 42 | } |
| 43 | |
| 44 | asmlinkage void set_esp0(unsigned long ssp) |
| 45 | { |
| 46 | current->thread.esp0 = ssp; |
| 47 | } |
| 48 | |
| 49 | /* |
| 50 | * Generic dumping code. Used for panic and debug. |
| 51 | */ |
| 52 | |
| 53 | static void dump(struct pt_regs *fp) |
| 54 | { |
| 55 | unsigned long *sp; |
| 56 | unsigned char *tp; |
| 57 | int i; |
| 58 | |
| 59 | pr_info("\nCURRENT PROCESS:\n\n"); |
| 60 | pr_info("COMM=%s PID=%d\n", current->comm, current->pid); |
| 61 | if (current->mm) { |
| 62 | pr_info("TEXT=%08x-%08x DATA=%08x-%08x BSS=%08x-%08x\n", |
| 63 | (int) current->mm->start_code, |
| 64 | (int) current->mm->end_code, |
| 65 | (int) current->mm->start_data, |
| 66 | (int) current->mm->end_data, |
| 67 | (int) current->mm->end_data, |
| 68 | (int) current->mm->brk); |
| 69 | pr_info("USER-STACK=%08x KERNEL-STACK=%08lx\n\n", |
| 70 | (int) current->mm->start_stack, |
| 71 | (int) PAGE_SIZE+(unsigned long)current); |
| 72 | } |
| 73 | |
| 74 | show_regs(fp); |
| 75 | pr_info("\nCODE:"); |
| 76 | tp = ((unsigned char *) fp->pc) - 0x20; |
| 77 | for (sp = (unsigned long *) tp, i = 0; (i < 0x40); i += 4) { |
| 78 | if ((i % 0x10) == 0) |
| 79 | pr_info("\n%08x: ", (int) (tp + i)); |
| 80 | pr_info("%08x ", (int) *sp++); |
| 81 | } |
| 82 | pr_info("\n"); |
| 83 | |
| 84 | pr_info("\nKERNEL STACK:"); |
| 85 | tp = ((unsigned char *) fp) - 0x40; |
| 86 | for (sp = (unsigned long *) tp, i = 0; (i < 0xc0); i += 4) { |
| 87 | if ((i % 0x10) == 0) |
| 88 | pr_info("\n%08x: ", (int) (tp + i)); |
| 89 | pr_info("%08x ", (int) *sp++); |
| 90 | } |
| 91 | pr_info("\n"); |
| 92 | if (STACK_MAGIC != *(unsigned long *)((unsigned long)current+PAGE_SIZE)) |
| 93 | pr_info("(Possibly corrupted stack page??)\n"); |
| 94 | |
| 95 | pr_info("\n\n"); |
| 96 | } |
| 97 | |
| 98 | void die(const char *str, struct pt_regs *fp, unsigned long err) |
| 99 | { |
| 100 | static int diecount; |
| 101 | |
| 102 | oops_enter(); |
| 103 | |
| 104 | console_verbose(); |
| 105 | spin_lock_irq(&die_lock); |
| 106 | report_bug(fp->pc, fp); |
| 107 | pr_crit("%s: %04lx [#%d] ", str, err & 0xffff, ++diecount); |
| 108 | dump(fp); |
| 109 | |
| 110 | spin_unlock_irq(&die_lock); |
| 111 | do_exit(SIGSEGV); |
| 112 | } |
| 113 | |
| 114 | static int kstack_depth_to_print = 24; |
| 115 | |
| 116 | void show_stack(struct task_struct *task, unsigned long *esp) |
| 117 | { |
| 118 | unsigned long *stack, addr; |
| 119 | int i; |
| 120 | |
| 121 | if (esp == NULL) |
| 122 | esp = (unsigned long *) &esp; |
| 123 | |
| 124 | stack = esp; |
| 125 | |
| 126 | pr_info("Stack from %08lx:", (unsigned long)stack); |
| 127 | for (i = 0; i < kstack_depth_to_print; i++) { |
| 128 | if (((unsigned long)stack & (THREAD_SIZE - 1)) == 0) |
| 129 | break; |
| 130 | if (i % 8 == 0) |
| 131 | pr_info("\n "); |
| 132 | pr_info(" %08lx", *stack++); |
| 133 | } |
| 134 | |
| 135 | pr_info("\nCall Trace:"); |
| 136 | i = 0; |
| 137 | stack = esp; |
| 138 | while (((unsigned long)stack & (THREAD_SIZE - 1)) != 0) { |
| 139 | addr = *stack++; |
| 140 | /* |
| 141 | * If the address is either in the text segment of the |
| 142 | * kernel, or in the region which contains vmalloc'ed |
| 143 | * memory, it *may* be the address of a calling |
| 144 | * routine; if so, print it so that someone tracing |
| 145 | * down the cause of the crash will be able to figure |
| 146 | * out the call path that was taken. |
| 147 | */ |
| 148 | if (check_kernel_text(addr)) { |
| 149 | if (i % 4 == 0) |
| 150 | pr_info("\n "); |
| 151 | pr_info(" [<%08lx>]", addr); |
| 152 | i++; |
| 153 | } |
| 154 | } |
| 155 | pr_info("\n"); |
| 156 | } |
| 157 | |
| 158 | void show_trace_task(struct task_struct *tsk) |
| 159 | { |
| 160 | show_stack(tsk, (unsigned long *)tsk->thread.esp0); |
| 161 | } |