[linux-2.6-block.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/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;

	pr_info("\nCURRENT PROCESS:\n\n");
	pr_info("COMM=%s PID=%d\n", current->comm, current->pid);
	if (current->mm) {
		pr_info("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);
		pr_info("USER-STACK=%08x  KERNEL-STACK=%08lx\n\n",
			(int) current->mm->start_stack,
			(int) PAGE_SIZE+(unsigned long)current);
	}

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

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

	pr_info("\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);
	pr_crit("%s: %04lx [#%d] ", str, err & 0xffff, ++diecount);
	dump(fp);

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

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;

	pr_info("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)
			pr_info("\n       ");
		pr_info(" %08lx", *stack++);
	}

	pr_info("\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)
				pr_info("\n       ");
			pr_info(" [<%08lx>]", addr);
			i++;
		}
	}
	pr_info("\n");
}

void show_trace_task(struct task_struct *tsk)
{
	show_stack(tsk, (unsigned long *)tsk->thread.esp0);
}
Commit	Line	Data
883251dd YS	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	}