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