[net-next-2.6.git] / arch / h8300 / kernel / traps.c

/*
 * linux/arch/h8300/boot/traps.c -- general exception handling code
 * H8/300 support Yoshinori Sato <ysato@users.sourceforge.jp>
 * 
 * Cloned from Linux/m68k.
 *
 * No original Copyright holder listed,
 * Probable original (C) Roman Zippel (assigned DJD, 1999)
 *
 * Copyright 1999-2000 D. Jeff Dionne, <jeff@rt-control.com>
 *
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file COPYING in the main directory of this archive
 * for more details.
 */

#include <linux/types.h>
#include <linux/sched.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/bug.h>

#include <asm/system.h>
#include <asm/irq.h>
#include <asm/traps.h>
#include <asm/page.h>

static DEFINE_SPINLOCK(die_lock);

/*
 * this must be called very early as the kernel might
 * use some instruction that are emulated on the 060
 */

void __init base_trap_init(void)
{
}

void __init trap_init (void)
{
}

asmlinkage void set_esp0 (unsigned long ssp)
{
	current->thread.esp0 = ssp;
}

/*
 *	Generic dumping code. Used for panic and debug.
 */

static void dump(struct pt_regs *fp)
{
	unsigned long	*sp;
	unsigned char	*tp;
	int		i;

	printk("\nCURRENT PROCESS:\n\n");
	printk("COMM=%s PID=%d\n", current->comm, current->pid);
	if (current->mm) {
		printk("TEXT=%08x-%08x DATA=%08x-%08x BSS=%08x-%08x\n",
			(int) current->mm->start_code,
			(int) current->mm->end_code,
			(int) current->mm->start_data,
			(int) current->mm->end_data,
			(int) current->mm->end_data,
			(int) current->mm->brk);
		printk("USER-STACK=%08x  KERNEL-STACK=%08lx\n\n",
			(int) current->mm->start_stack,
			(int) PAGE_SIZE+(unsigned long)current);
	}

	show_regs(fp);
	printk("\nCODE:");
	tp = ((unsigned char *) fp->pc) - 0x20;
	for (sp = (unsigned long *) tp, i = 0; (i < 0x40);  i += 4) {
		if ((i % 0x10) == 0)
			printk("\n%08x: ", (int) (tp + i));
		printk("%08x ", (int) *sp++);
	}
	printk("\n");

	printk("\nKERNEL STACK:");
	tp = ((unsigned char *) fp) - 0x40;
	for (sp = (unsigned long *) tp, i = 0; (i < 0xc0); i += 4) {
		if ((i % 0x10) == 0)
			printk("\n%08x: ", (int) (tp + i));
		printk("%08x ", (int) *sp++);
	}
	printk("\n");
	if (STACK_MAGIC != *(unsigned long *)((unsigned long)current+PAGE_SIZE))
                printk("(Possibly corrupted stack page??)\n");

	printk("\n\n");
}

void die(const char *str, struct pt_regs *fp, unsigned long err)
{
	static int diecount;

	oops_enter();

	console_verbose();
	spin_lock_irq(&die_lock);
	report_bug(fp->pc, fp);
	printk(KERN_EMERG "%s: %04lx [#%d] ", str, err & 0xffff, ++diecount);
	dump(fp);

	spin_unlock_irq(&die_lock);
	do_exit(SIGSEGV);
}

extern char _start, _etext;
#define check_kernel_text(addr) \
        ((addr >= (unsigned long)(&_start)) && \
         (addr <  (unsigned long)(&_etext))) 

static int kstack_depth_to_print = 24;

void show_stack(struct task_struct *task, unsigned long *esp)
{
	unsigned long *stack,  addr;
	int i;

	if (esp == NULL)
		esp = (unsigned long *) &esp;

	stack = esp;

	printk("Stack from %08lx:", (unsigned long)stack);
	for (i = 0; i < kstack_depth_to_print; i++) {
		if (((unsigned long)stack & (THREAD_SIZE - 1)) == 0)
			break;
		if (i % 8 == 0)
			printk("\n       ");
		printk(" %08lx", *stack++);
	}

	printk("\nCall Trace:");
	i = 0;
	stack = esp;
	while (((unsigned long)stack & (THREAD_SIZE - 1)) != 0) {
		addr = *stack++;
		/*
		 * If the address is either in the text segment of the
		 * kernel, or in the region which contains vmalloc'ed
		 * memory, it *may* be the address of a calling
		 * routine; if so, print it so that someone tracing
		 * down the cause of the crash will be able to figure
		 * out the call path that was taken.
		 */
		if (check_kernel_text(addr)) {
			if (i % 4 == 0)
				printk("\n       ");
			printk(" [<%08lx>]", addr);
			i++;
		}
	}
	printk("\n");
}

void show_trace_task(struct task_struct *tsk)
{
	show_stack(tsk,(unsigned long *)tsk->thread.esp0);
}

void dump_stack(void)
{
	show_stack(NULL,NULL);
}

EXPORT_SYMBOL(dump_stack);
Commit	Line	Data
1da177e4 LT	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,
5e71c605	8	* Probable original (C) Roman Zippel (assigned DJD, 1999)
1da177e4 LT	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>
9791af55	23	#include <linux/bug.h>
1da177e4 LT	24
	25	#include <asm/system.h>
	26	#include <asm/irq.h>
	27	#include <asm/traps.h>
	28	#include <asm/page.h>
9791af55 YS	29
9791af55 YS	30	static DEFINE_SPINLOCK(die_lock);
1da177e4 LT	31
	32	/*
	33	* this must be called very early as the kernel might
	34	* use some instruction that are emulated on the 060
	35	*/
	36
	37	void __init base_trap_init(void)
	38	{
	39	}
	40
	41	void __init trap_init (void)
	42	{
	43	}
	44
	45	asmlinkage void set_esp0 (unsigned long ssp)
	46	{
	47	current->thread.esp0 = ssp;
	48	}
	49
	50	/*
	51	* Generic dumping code. Used for panic and debug.
	52	*/
	53
	54	static void dump(struct pt_regs *fp)
	55	{
	56	unsigned long *sp;
	57	unsigned char *tp;
	58	int i;
	59
	60	printk("\nCURRENT PROCESS:\n\n");
	61	printk("COMM=%s PID=%d\n", current->comm, current->pid);
	62	if (current->mm) {
	63	printk("TEXT=%08x-%08x DATA=%08x-%08x BSS=%08x-%08x\n",
	64	(int) current->mm->start_code,
	65	(int) current->mm->end_code,
	66	(int) current->mm->start_data,
	67	(int) current->mm->end_data,
	68	(int) current->mm->end_data,
	69	(int) current->mm->brk);
	70	printk("USER-STACK=%08x KERNEL-STACK=%08lx\n\n",
	71	(int) current->mm->start_stack,
	72	(int) PAGE_SIZE+(unsigned long)current);
	73	}
	74
	75	show_regs(fp);
	76	printk("\nCODE:");
	77	tp = ((unsigned char *) fp->pc) - 0x20;
	78	for (sp = (unsigned long *) tp, i = 0; (i < 0x40); i += 4) {
	79	if ((i % 0x10) == 0)
	80	printk("\n%08x: ", (int) (tp + i));
	81	printk("%08x ", (int) *sp++);
	82	}
	83	printk("\n");
	84
	85	printk("\nKERNEL STACK:");
	86	tp = ((unsigned char *) fp) - 0x40;
	87	for (sp = (unsigned long *) tp, i = 0; (i < 0xc0); i += 4) {
	88	if ((i % 0x10) == 0)
	89	printk("\n%08x: ", (int) (tp + i));
	90	printk("%08x ", (int) *sp++);
	91	}
	92	printk("\n");
	93	if (STACK_MAGIC != (unsigned long )((unsigned long)current+PAGE_SIZE))
	94	printk("(Possibly corrupted stack page??)\n");
95
96	printk("\n\n");
97	}
98
b857189d	99	void die(const char str, struct pt_regs fp, unsigned long err)
1da177e4	100	{
9791af55	101	static int diecount;
1da177e4	102
9791af55	103	oops_enter();
1da177e4	104
9791af55 YS	105	console_verbose();
	106	spin_lock_irq(&die_lock);
	107	report_bug(fp->pc, fp);
	108	printk(KERN_EMERG "%s: %04lx [#%d] ", str, err & 0xffff, ++diecount);
1da177e4 LT	109	dump(fp);
1da177e4 LT	110
9791af55	111	spin_unlock_irq(&die_lock);
1da177e4 LT	112	do_exit(SIGSEGV);
	113	}
	114
	115	extern char _start, _etext;
	116	#define check_kernel_text(addr) \
	117	((addr >= (unsigned long)(&_start)) && \
	118	(addr < (unsigned long)(&_etext)))
	119
	120	static int kstack_depth_to_print = 24;
	121
	122	void show_stack(struct task_struct task, unsigned long esp)
	123	{
	124	unsigned long *stack, addr;
	125	int i;
	126
	127	if (esp == NULL)
	128	esp = (unsigned long *) &esp;
	129
	130	stack = esp;
	131
	132	printk("Stack from %08lx:", (unsigned long)stack);
	133	for (i = 0; i < kstack_depth_to_print; i++) {
	134	if (((unsigned long)stack & (THREAD_SIZE - 1)) == 0)
	135	break;
	136	if (i % 8 == 0)
	137	printk("\n ");
	138	printk(" %08lx", *stack++);
	139	}
	140
	141	printk("\nCall Trace:");
	142	i = 0;
	143	stack = esp;
8778beb9	144	while (((unsigned long)stack & (THREAD_SIZE - 1)) != 0) {
1da177e4 LT	145	addr = *stack++;
	146	/*
	147	* If the address is either in the text segment of the
	148	* kernel, or in the region which contains vmalloc'ed
	149	* memory, it may be the address of a calling
	150	* routine; if so, print it so that someone tracing
	151	* down the cause of the crash will be able to figure
	152	* out the call path that was taken.
	153	*/
	154	if (check_kernel_text(addr)) {
	155	if (i % 4 == 0)
	156	printk("\n ");
	157	printk(" [<%08lx>]", addr);
	158	i++;
	159	}
	160	}
	161	printk("\n");
	162	}
	163
	164	void show_trace_task(struct task_struct *tsk)
	165	{
	166	show_stack(tsk,(unsigned long *)tsk->thread.esp0);
	167	}
	168
	169	void dump_stack(void)
	170	{
	171	show_stack(NULL,NULL);
	172	}
	173
	174	EXPORT_SYMBOL(dump_stack);