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Diffstat (limited to 'arch/ia64/kernel/traps.c')
-rw-r--r--arch/ia64/kernel/traps.c62
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", &regs, 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", &regs, vector, siginfo.si_code, SIGTRAP)
+ == NOTIFY_STOP)
+ return;
siginfo.si_signo = SIGTRAP;
siginfo.si_errno = 0;
siginfo.si_addr = (void __user *) ifa;