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/*
* 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/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");
}
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