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159 lines
3.7 KiB
159 lines
3.7 KiB
/* |
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* linux/arch/h8300/boot/traps.c -- general exception handling code |
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* H8/300 support Yoshinori Sato <[email protected]> |
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* |
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* Cloned from Linux/m68k. |
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* |
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* No original Copyright holder listed, |
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* Probable original (C) Roman Zippel (assigned DJD, 1999) |
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* |
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* Copyright 1999-2000 D. Jeff Dionne, <[email protected]> |
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* |
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* This file is subject to the terms and conditions of the GNU General Public |
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* License. See the file COPYING in the main directory of this archive |
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* for more details. |
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*/ |
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#include <linux/types.h> |
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#include <linux/sched.h> |
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#include <linux/sched/debug.h> |
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#include <linux/mm_types.h> |
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#include <linux/kernel.h> |
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#include <linux/errno.h> |
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#include <linux/init.h> |
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#include <linux/module.h> |
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#include <linux/bug.h> |
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#include <asm/irq.h> |
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#include <asm/traps.h> |
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#include <asm/page.h> |
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static DEFINE_SPINLOCK(die_lock); |
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/* |
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* this must be called very early as the kernel might |
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* use some instruction that are emulated on the 060 |
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*/ |
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void __init base_trap_init(void) |
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{ |
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} |
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void __init trap_init(void) |
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{ |
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} |
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asmlinkage void set_esp0(unsigned long ssp) |
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{ |
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current->thread.esp0 = ssp; |
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} |
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/* |
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* Generic dumping code. Used for panic and debug. |
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*/ |
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static void dump(struct pt_regs *fp) |
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{ |
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unsigned long *sp; |
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unsigned char *tp; |
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int i; |
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pr_info("\nCURRENT PROCESS:\n\n"); |
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pr_info("COMM=%s PID=%d\n", current->comm, current->pid); |
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if (current->mm) { |
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pr_info("TEXT=%08x-%08x DATA=%08x-%08x BSS=%08x-%08x\n", |
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(int) current->mm->start_code, |
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(int) current->mm->end_code, |
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(int) current->mm->start_data, |
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(int) current->mm->end_data, |
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(int) current->mm->end_data, |
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(int) current->mm->brk); |
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pr_info("USER-STACK=%08x KERNEL-STACK=%08lx\n\n", |
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(int) current->mm->start_stack, |
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(int) PAGE_SIZE+(unsigned long)current); |
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} |
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show_regs(fp); |
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pr_info("\nCODE:"); |
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tp = ((unsigned char *) fp->pc) - 0x20; |
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for (sp = (unsigned long *) tp, i = 0; (i < 0x40); i += 4) { |
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if ((i % 0x10) == 0) |
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pr_info("\n%08x: ", (int) (tp + i)); |
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pr_info("%08x ", (int) *sp++); |
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} |
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pr_info("\n"); |
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pr_info("\nKERNEL STACK:"); |
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tp = ((unsigned char *) fp) - 0x40; |
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for (sp = (unsigned long *) tp, i = 0; (i < 0xc0); i += 4) { |
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if ((i % 0x10) == 0) |
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pr_info("\n%08x: ", (int) (tp + i)); |
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pr_info("%08x ", (int) *sp++); |
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} |
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pr_info("\n"); |
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if (STACK_MAGIC != *(unsigned long *)((unsigned long)current+PAGE_SIZE)) |
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pr_info("(Possibly corrupted stack page??)\n"); |
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pr_info("\n\n"); |
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} |
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void die(const char *str, struct pt_regs *fp, unsigned long err) |
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{ |
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static int diecount; |
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oops_enter(); |
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console_verbose(); |
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spin_lock_irq(&die_lock); |
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report_bug(fp->pc, fp); |
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pr_crit("%s: %04lx [#%d] ", str, err & 0xffff, ++diecount); |
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dump(fp); |
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spin_unlock_irq(&die_lock); |
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do_exit(SIGSEGV); |
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} |
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static int kstack_depth_to_print = 24; |
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void show_stack(struct task_struct *task, unsigned long *esp, const char *loglvl) |
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{ |
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unsigned long *stack, addr; |
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int i; |
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if (esp == NULL) |
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esp = (unsigned long *) &esp; |
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stack = esp; |
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printk("%sStack from %08lx:", loglvl, (unsigned long)stack); |
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for (i = 0; i < kstack_depth_to_print; i++) { |
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if (((unsigned long)stack & (THREAD_SIZE - 1)) >= |
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THREAD_SIZE-4) |
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break; |
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if (i % 8 == 0) |
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printk("%s ", loglvl); |
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pr_cont(" %08lx", *stack++); |
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} |
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printk("%s\nCall Trace:\n", loglvl); |
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i = 0; |
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stack = esp; |
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while (((unsigned long)stack & (THREAD_SIZE - 1)) < THREAD_SIZE-4) { |
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addr = *stack++; |
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/* |
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* If the address is either in the text segment of the |
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* kernel, or in the region which contains vmalloc'ed |
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* memory, it *may* be the address of a calling |
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* routine; if so, print it so that someone tracing |
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* down the cause of the crash will be able to figure |
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* out the call path that was taken. |
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*/ |
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if (check_kernel_text(addr)) { |
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if (i % 4 == 0) |
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printk("%s ", loglvl); |
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pr_cont(" [<%08lx>]", addr); |
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i++; |
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} |
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} |
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printk("%s\n", loglvl); |
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}
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