diff options
Diffstat (limited to 'arch/sh/kernel/traps.c')
| -rw-r--r-- | arch/sh/kernel/traps.c | 73 |
1 files changed, 37 insertions, 36 deletions
diff --git a/arch/sh/kernel/traps.c b/arch/sh/kernel/traps.c index e9f168f60f9..7b40f0ff3df 100644 --- a/arch/sh/kernel/traps.c +++ b/arch/sh/kernel/traps.c @@ -5,7 +5,7 @@ * SuperH version: Copyright (C) 1999 Niibe Yutaka * Copyright (C) 2000 Philipp Rumpf * Copyright (C) 2000 David Howells - * Copyright (C) 2002 - 2006 Paul Mundt + * Copyright (C) 2002 - 2007 Paul Mundt * * 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 @@ -18,10 +18,12 @@ #include <linux/module.h> #include <linux/kallsyms.h> #include <linux/io.h> +#include <linux/bug.h> #include <linux/debug_locks.h> #include <linux/limits.h> #include <asm/system.h> #include <asm/uaccess.h> +#include <asm/kdebug.h> #ifdef CONFIG_SH_KGDB #include <asm/kgdb.h> @@ -74,7 +76,21 @@ static void dump_mem(const char *str, unsigned long bottom, unsigned long top) } } -DEFINE_SPINLOCK(die_lock); +ATOMIC_NOTIFIER_HEAD(shdie_chain); + +int register_die_notifier(struct notifier_block *nb) +{ + return atomic_notifier_chain_register(&shdie_chain, nb); +} +EXPORT_SYMBOL(register_die_notifier); + +int unregister_die_notifier(struct notifier_block *nb) +{ + return atomic_notifier_chain_unregister(&shdie_chain, nb); +} +EXPORT_SYMBOL(unregister_die_notifier); + +static DEFINE_SPINLOCK(die_lock); void die(const char * str, struct pt_regs * regs, long err) { @@ -130,40 +146,6 @@ static int die_if_no_fixup(const char * str, struct pt_regs * regs, long err) return -EFAULT; } -#ifdef CONFIG_BUG -#ifdef CONFIG_DEBUG_BUGVERBOSE -static inline void do_bug_verbose(struct pt_regs *regs) -{ - struct bug_frame f; - long len; - - if (__copy_from_user(&f, (const void __user *)regs->pc, - sizeof(struct bug_frame))) - return; - - len = __strnlen_user(f.file, PATH_MAX) - 1; - if (unlikely(len < 0 || len >= PATH_MAX)) - f.file = "<bad filename>"; - len = __strnlen_user(f.func, PATH_MAX) - 1; - if (unlikely(len < 0 || len >= PATH_MAX)) - f.func = "<bad function>"; - - printk(KERN_ALERT "kernel BUG in %s() at %s:%d!\n", - f.func, f.file, f.line); -} -#else -static inline void do_bug_verbose(struct pt_regs *regs) -{ -} -#endif /* CONFIG_DEBUG_BUGVERBOSE */ - -void handle_BUG(struct pt_regs *regs) -{ - do_bug_verbose(regs); - die("Kernel BUG", regs, TRAPA_BUG_OPCODE & 0xff); -} -#endif /* CONFIG_BUG */ - /* * handle an instruction that does an unaligned memory access by emulating the * desired behaviour @@ -888,6 +870,25 @@ void __init trap_init(void) per_cpu_trap_init(); } +#ifdef CONFIG_BUG +void handle_BUG(struct pt_regs *regs) +{ + enum bug_trap_type tt; + tt = report_bug(regs->pc); + if (tt == BUG_TRAP_TYPE_WARN) { + regs->pc += 2; + return; + } + + die("Kernel BUG", regs, TRAPA_BUG_OPCODE & 0xff); +} + +int is_valid_bugaddr(unsigned long addr) +{ + return addr >= PAGE_OFFSET; +} +#endif + void show_trace(struct task_struct *tsk, unsigned long *sp, struct pt_regs *regs) { |