2 * linux/arch/h8300/boot/traps.c -- general exception handling code
3 * H8/300 support Yoshinori Sato <ysato@users.sourceforge.jp>
5 * Cloned from Linux/m68k.
7 * No original Copyright holder listed,
8 * Probabily original (C) Roman Zippel (assigned DJD, 1999)
10 * Copyright 1999-2000 D. Jeff Dionne, <jeff@rt-control.com>
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
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>
24 #include <asm/system.h>
26 #include <asm/traps.h>
31 * this must be called very early as the kernel might
32 * use some instruction that are emulated on the 060
35 void __init base_trap_init(void)
39 void __init trap_init (void)
43 asmlinkage void set_esp0 (unsigned long ssp)
45 current->thread.esp0 = ssp;
49 * Generic dumping code. Used for panic and debug.
52 static void dump(struct pt_regs *fp)
58 printk("\nCURRENT PROCESS:\n\n");
59 printk("COMM=%s PID=%d\n", current->comm, current->pid);
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);
75 tp = ((unsigned char *) fp->pc) - 0x20;
76 for (sp = (unsigned long *) tp, i = 0; (i < 0x40); i += 4) {
78 printk("\n%08x: ", (int) (tp + i));
79 printk("%08x ", (int) *sp++);
83 printk("\nKERNEL STACK:");
84 tp = ((unsigned char *) fp) - 0x40;
85 for (sp = (unsigned long *) tp, i = 0; (i < 0xc0); i += 4) {
87 printk("\n%08x: ", (int) (tp + i));
88 printk("%08x ", (int) *sp++);
91 if (STACK_MAGIC != *(unsigned long *)((unsigned long)current+PAGE_SIZE))
92 printk("(Possibly corrupted stack page??)\n");
97 void die_if_kernel (char *str, struct pt_regs *fp, int nr)
99 extern int console_loglevel;
101 if (!(fp->ccr & PS_S))
104 console_loglevel = 15;
110 extern char _start, _etext;
111 #define check_kernel_text(addr) \
112 ((addr >= (unsigned long)(&_start)) && \
113 (addr < (unsigned long)(&_etext)))
115 static int kstack_depth_to_print = 24;
117 void show_stack(struct task_struct *task, unsigned long *esp)
119 unsigned long *stack, addr;
123 esp = (unsigned long *) &esp;
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)
133 printk(" %08lx", *stack++);
136 printk("\nCall Trace:");
139 while (((unsigned long)stack & (THREAD_SIZE - 1)) == 0) {
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.
149 if (check_kernel_text(addr)) {
152 printk(" [<%08lx>]", addr);
159 void show_trace_task(struct task_struct *tsk)
161 show_stack(tsk,(unsigned long *)tsk->thread.esp0);
164 void dump_stack(void)
166 show_stack(NULL,NULL);
169 EXPORT_SYMBOL(dump_stack);