diff options
Diffstat (limited to 'arch/ia64/kernel/traps.c')
-rw-r--r-- | arch/ia64/kernel/traps.c | 62 |
1 files changed, 20 insertions, 42 deletions
diff --git a/arch/ia64/kernel/traps.c b/arch/ia64/kernel/traps.c index f970359e7ed..d3e0ecb56d6 100644 --- a/arch/ia64/kernel/traps.c +++ b/arch/ia64/kernel/traps.c @@ -30,17 +30,20 @@ fpswa_interface_t *fpswa_interface; EXPORT_SYMBOL(fpswa_interface); struct notifier_block *ia64die_chain; -static DEFINE_SPINLOCK(die_notifier_lock); -int register_die_notifier(struct notifier_block *nb) +int +register_die_notifier(struct notifier_block *nb) { - int err = 0; - unsigned long flags; - spin_lock_irqsave(&die_notifier_lock, flags); - err = notifier_chain_register(&ia64die_chain, nb); - spin_unlock_irqrestore(&die_notifier_lock, flags); - return err; + return notifier_chain_register(&ia64die_chain, nb); } +EXPORT_SYMBOL_GPL(register_die_notifier); + +int +unregister_die_notifier(struct notifier_block *nb) +{ + return notifier_chain_unregister(&ia64die_chain, nb); +} +EXPORT_SYMBOL_GPL(unregister_die_notifier); void __init trap_init (void) @@ -105,6 +108,7 @@ die (const char *str, struct pt_regs *regs, long err) if (++die.lock_owner_depth < 3) { printk("%s[%d]: %s %ld [%d]\n", current->comm, current->pid, str, err, ++die_counter); + (void) notify_die(DIE_OOPS, (char *)str, regs, err, 255, SIGSEGV); show_regs(regs); } else printk(KERN_ERR "Recursive die() failure, output suppressed\n"); @@ -128,24 +132,6 @@ __kprobes ia64_bad_break (unsigned long break_num, struct pt_regs *regs) siginfo_t siginfo; int sig, code; - /* break.b always sets cr.iim to 0, which causes problems for - * debuggers. Get the real break number from the original instruction, - * but only for kernel code. User space break.b is left alone, to - * preserve the existing behaviour. All break codings have the same - * format, so there is no need to check the slot type. - */ - if (break_num == 0 && !user_mode(regs)) { - struct ia64_psr *ipsr = ia64_psr(regs); - unsigned long *bundle = (unsigned long *)regs->cr_iip; - unsigned long slot; - switch (ipsr->ri) { - case 0: slot = (bundle[0] >> 5); break; - case 1: slot = (bundle[0] >> 46) | (bundle[1] << 18); break; - default: slot = (bundle[1] >> 23); break; - } - break_num = ((slot >> 36 & 1) << 20) | (slot >> 6 & 0xfffff); - } - /* SIGILL, SIGFPE, SIGSEGV, and SIGBUS want these field initialized: */ siginfo.si_addr = (void __user *) (regs->cr_iip + ia64_psr(regs)->ri); siginfo.si_imm = break_num; @@ -155,9 +141,8 @@ __kprobes ia64_bad_break (unsigned long break_num, struct pt_regs *regs) switch (break_num) { case 0: /* unknown error (used by GCC for __builtin_abort()) */ if (notify_die(DIE_BREAK, "break 0", regs, break_num, TRAP_BRKPT, SIGTRAP) - == NOTIFY_STOP) { + == NOTIFY_STOP) return; - } die_if_kernel("bugcheck!", regs, break_num); sig = SIGILL; code = ILL_ILLOPC; break; @@ -210,15 +195,6 @@ __kprobes ia64_bad_break (unsigned long break_num, struct pt_regs *regs) sig = SIGILL; code = __ILL_BNDMOD; break; - case 0x80200: - case 0x80300: - if (notify_die(DIE_BREAK, "kprobe", regs, break_num, TRAP_BRKPT, SIGTRAP) - == NOTIFY_STOP) { - return; - } - sig = SIGTRAP; code = TRAP_BRKPT; - break; - default: if (break_num < 0x40000 || break_num > 0x100000) die_if_kernel("Bad break", regs, break_num); @@ -226,6 +202,9 @@ __kprobes ia64_bad_break (unsigned long break_num, struct pt_regs *regs) if (break_num < 0x80000) { sig = SIGILL; code = __ILL_BREAK; } else { + if (notify_die(DIE_BREAK, "bad break", regs, break_num, TRAP_BRKPT, SIGTRAP) + == NOTIFY_STOP) + return; sig = SIGTRAP; code = TRAP_BRKPT; } } @@ -578,12 +557,11 @@ ia64_fault (unsigned long vector, unsigned long isr, unsigned long ifa, #endif break; case 35: siginfo.si_code = TRAP_BRANCH; ifa = 0; break; - case 36: - if (notify_die(DIE_SS, "ss", ®s, vector, - vector, SIGTRAP) == NOTIFY_STOP) - return; - siginfo.si_code = TRAP_TRACE; ifa = 0; break; + case 36: siginfo.si_code = TRAP_TRACE; ifa = 0; break; } + if (notify_die(DIE_FAULT, "ia64_fault", ®s, vector, siginfo.si_code, SIGTRAP) + == NOTIFY_STOP) + return; siginfo.si_signo = SIGTRAP; siginfo.si_errno = 0; siginfo.si_addr = (void __user *) ifa; |