[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/sched/debug.h>
#include <linux/mm_types.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)) >=
		    THREAD_SIZE-4)
			break;
		if (i % 8 == 0)
			pr_info(" ");
		pr_cont(" %08lx", *stack++);
	}

	pr_info("\nCall Trace:\n");
	i = 0;
	stack = esp;
	while (((unsigned long)stack & (THREAD_SIZE - 1)) < THREAD_SIZE-4) {
		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("       ");
			pr_cont(" [<%08lx>]", addr);
			i++;
		}
	}
	pr_info("\n");
}
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>
b17b0153	19	#include <linux/sched/debug.h>
589ee628	20	#include <linux/mm_types.h>
883251dd YS	21	#include <linux/kernel.h>
	22	#include <linux/errno.h>
	23	#include <linux/init.h>
	24	#include <linux/module.h>
	25	#include <linux/bug.h>
	26
	27	#include <asm/irq.h>
	28	#include <asm/traps.h>
	29	#include <asm/page.h>
	30
	31	static DEFINE_SPINLOCK(die_lock);
	32
	33	/*
	34	* this must be called very early as the kernel might
	35	* use some instruction that are emulated on the 060
	36	*/
	37
	38	void __init base_trap_init(void)
	39	{
	40	}
	41
	42	void __init trap_init(void)
	43	{
	44	}
	45
	46	asmlinkage void set_esp0(unsigned long ssp)
	47	{
	48	current->thread.esp0 = ssp;
	49	}
	50
	51	/*
	52	* Generic dumping code. Used for panic and debug.
	53	*/
	54
	55	static void dump(struct pt_regs *fp)
	56	{
	57	unsigned long *sp;
	58	unsigned char *tp;
	59	int i;
	60
	61	pr_info("\nCURRENT PROCESS:\n\n");
	62	pr_info("COMM=%s PID=%d\n", current->comm, current->pid);
	63	if (current->mm) {
	64	pr_info("TEXT=%08x-%08x DATA=%08x-%08x BSS=%08x-%08x\n",
	65	(int) current->mm->start_code,
	66	(int) current->mm->end_code,
	67	(int) current->mm->start_data,
	68	(int) current->mm->end_data,
	69	(int) current->mm->end_data,
	70	(int) current->mm->brk);
	71	pr_info("USER-STACK=%08x KERNEL-STACK=%08lx\n\n",
	72	(int) current->mm->start_stack,
	73	(int) PAGE_SIZE+(unsigned long)current);
	74	}
	75
	76	show_regs(fp);
	77	pr_info("\nCODE:");
	78	tp = ((unsigned char *) fp->pc) - 0x20;
	79	for (sp = (unsigned long *) tp, i = 0; (i < 0x40); i += 4) {
	80	if ((i % 0x10) == 0)
	81	pr_info("\n%08x: ", (int) (tp + i));
	82	pr_info("%08x ", (int) *sp++);
	83	}
	84	pr_info("\n");
85
86	pr_info("\nKERNEL STACK:");
87	tp = ((unsigned char *) fp) - 0x40;
88	for (sp = (unsigned long *) tp, i = 0; (i < 0xc0); i += 4) {
89	if ((i % 0x10) == 0)
90	pr_info("\n%08x: ", (int) (tp + i));
91	pr_info("%08x ", (int) *sp++);
92	}
93	pr_info("\n");
94	if (STACK_MAGIC != (unsigned long )((unsigned long)current+PAGE_SIZE))
95	pr_info("(Possibly corrupted stack page??)\n");
96
97	pr_info("\n\n");
98	}
99
100	void die(const char str, struct pt_regs fp, unsigned long err)
101	{
102	static int diecount;
103
104	oops_enter();
105
106	console_verbose();
107	spin_lock_irq(&die_lock);
108	report_bug(fp->pc, fp);
109	pr_crit("%s: %04lx [#%d] ", str, err & 0xffff, ++diecount);
110	dump(fp);
111
112	spin_unlock_irq(&die_lock);
113	do_exit(SIGSEGV);
114	}
115
116	static int kstack_depth_to_print = 24;
117
118	void show_stack(struct task_struct task, unsigned long esp)
119	{
120	unsigned long *stack, addr;
121	int i;
122
123	if (esp == NULL)
124	esp = (unsigned long *) &esp;
125
126	stack = esp;
127
128	pr_info("Stack from %08lx:", (unsigned long)stack);
129	for (i = 0; i < kstack_depth_to_print; i++) {
bf24eec3 YS	130	if (((unsigned long)stack & (THREAD_SIZE - 1)) >=
bf24eec3 YS	131	THREAD_SIZE-4)
883251dd YS	132	break;
883251dd YS	133	if (i % 8 == 0)
bf24eec3 YS	134	pr_info(" ");
bf24eec3 YS	135	pr_cont(" %08lx", *stack++);
883251dd YS	136	}
883251dd YS	137
bf24eec3	138	pr_info("\nCall Trace:\n");
883251dd YS	139	i = 0;
883251dd YS	140	stack = esp;
bf24eec3	141	while (((unsigned long)stack & (THREAD_SIZE - 1)) < THREAD_SIZE-4) {
883251dd YS	142	addr = *stack++;
	143	/*
	144	* If the address is either in the text segment of the
	145	* kernel, or in the region which contains vmalloc'ed
	146	* memory, it may be the address of a calling
	147	* routine; if so, print it so that someone tracing
	148	* down the cause of the crash will be able to figure
	149	* out the call path that was taken.
	150	*/
	151	if (check_kernel_text(addr)) {
	152	if (i % 4 == 0)
bf24eec3 YS	153	pr_info(" ");
bf24eec3 YS	154	pr_cont(" [<%08lx>]", addr);
883251dd YS	155	i++;
	156	}
	157	}
	158	pr_info("\n");
	159	}