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/*
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* arch/v850/kernel/bug.c -- Bug reporting functions
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*
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* Copyright (C) 2001,02,03 NEC Electronics Corporation
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* Copyright (C) 2001,02,03 Miles Bader <miles@gnu.org>
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*
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* This file is subject to the terms and conditions of the GNU General
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* Public License. See the file COPYING in the main directory of this
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* archive for more details.
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*
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* Written by Miles Bader <miles@gnu.org>
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*/
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#include <linux/kernel.h>
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#include <linux/reboot.h>
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#include <linux/sched.h>
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#include <linux/module.h>
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#include <asm/errno.h>
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#include <asm/ptrace.h>
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#include <asm/processor.h>
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#include <asm/current.h>
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/* We should use __builtin_return_address, but it doesn't work in gcc-2.90
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(which is currently our standard compiler on the v850). */
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#define ret_addr() ({ register u32 lp asm ("lp"); lp; })
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#define stack_addr() ({ register u32 sp asm ("sp"); sp; })
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void __bug ()
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{
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printk (KERN_CRIT "kernel BUG at PC 0x%x (SP ~0x%x)!\n",
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ret_addr() - 4, /* - 4 for `jarl' */
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stack_addr());
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machine_halt ();
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}
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int bad_trap (int trap_num, struct pt_regs *regs)
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{
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printk (KERN_CRIT
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"unimplemented trap %d called at 0x%08lx, pid %d!\n",
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trap_num, regs->pc, current->pid);
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return -ENOSYS;
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}
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#ifdef CONFIG_RESET_GUARD
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void unexpected_reset (unsigned long ret_addr, unsigned long kmode,
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struct task_struct *task, unsigned long sp)
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{
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printk (KERN_CRIT
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"unexpected reset in %s mode, pid %d"
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" (ret_addr = 0x%lx, sp = 0x%lx)\n",
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kmode ? "kernel" : "user",
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task ? task->pid : -1,
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ret_addr, sp);
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machine_halt ();
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}
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#endif /* CONFIG_RESET_GUARD */
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struct spec_reg_name {
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const char *name;
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int gpr;
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};
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struct spec_reg_name spec_reg_names[] = {
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{ "sp", GPR_SP },
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{ "gp", GPR_GP },
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{ "tp", GPR_TP },
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{ "ep", GPR_EP },
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{ "lp", GPR_LP },
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{ 0, 0 }
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};
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void show_regs (struct pt_regs *regs)
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{
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int gpr_base, gpr_offs;
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printk (" pc 0x%08lx psw 0x%08lx kernel_mode %d\n",
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regs->pc, regs->psw, regs->kernel_mode);
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printk (" ctpc 0x%08lx ctpsw 0x%08lx ctbp 0x%08lx\n",
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regs->ctpc, regs->ctpsw, regs->ctbp);
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for (gpr_base = 0; gpr_base < NUM_GPRS; gpr_base += 4) {
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for (gpr_offs = 0; gpr_offs < 4; gpr_offs++) {
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int gpr = gpr_base + gpr_offs;
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long val = regs->gpr[gpr];
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struct spec_reg_name *srn;
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for (srn = spec_reg_names; srn->name; srn++)
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if (srn->gpr == gpr)
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break;
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if (srn->name)
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printk ("%7s 0x%08lx", srn->name, val);
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else
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printk (" r%02d 0x%08lx", gpr, val);
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}
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printk ("\n");
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}
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}
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/*
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* TASK is a pointer to the task whose backtrace we want to see (or NULL
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* for current task), SP is the stack pointer of the first frame that
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* should be shown in the back trace (or NULL if the entire call-chain of
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* the task should be shown).
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*/
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void show_stack (struct task_struct *task, unsigned long *sp)
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{
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unsigned long addr, end;
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if (sp)
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addr = (unsigned long)sp;
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else if (task)
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addr = task_sp (task);
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else
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addr = stack_addr ();
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addr = addr & ~3;
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end = (addr + THREAD_SIZE - 1) & THREAD_MASK;
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while (addr < end) {
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printk ("%8lX: ", addr);
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while (addr < end) {
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printk (" %8lX", *(unsigned long *)addr);
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addr += sizeof (unsigned long);
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if (! (addr & 0xF))
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break;
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}
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printk ("\n");
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}
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}
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void dump_stack ()
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{
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show_stack (0, 0);
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}
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EXPORT_SYMBOL(dump_stack);
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