diff options
Diffstat (limited to 'arch/avr32/kernel/traps.c')
| -rw-r--r-- | arch/avr32/kernel/traps.c | 78 |
1 files changed, 44 insertions, 34 deletions
diff --git a/arch/avr32/kernel/traps.c b/arch/avr32/kernel/traps.c index 9a73ce7eb50..682b2478691 100644 --- a/arch/avr32/kernel/traps.c +++ b/arch/avr32/kernel/traps.c @@ -7,8 +7,10 @@ */ #include <linux/bug.h> +#include <linux/hardirq.h> #include <linux/init.h> #include <linux/kallsyms.h> +#include <linux/kdebug.h> #include <linux/module.h> #include <linux/notifier.h> #include <linux/sched.h> @@ -22,7 +24,7 @@ static DEFINE_SPINLOCK(die_lock); -void NORET_TYPE die(const char *str, struct pt_regs *regs, long err) +void die(const char *str, struct pt_regs *regs, long err) { static int die_counter; @@ -30,22 +32,25 @@ void NORET_TYPE die(const char *str, struct pt_regs *regs, long err) spin_lock_irq(&die_lock); bust_spinlocks(1); - printk(KERN_ALERT "Oops: %s, sig: %ld [#%d]\n" KERN_EMERG, + printk(KERN_ALERT "Oops: %s, sig: %ld [#%d]\n", str, err, ++die_counter); + + printk(KERN_EMERG); + #ifdef CONFIG_PREEMPT - printk("PREEMPT "); + printk(KERN_CONT "PREEMPT "); #endif #ifdef CONFIG_FRAME_POINTER - printk("FRAME_POINTER "); + printk(KERN_CONT "FRAME_POINTER "); #endif if (current_cpu_data.features & AVR32_FEATURE_OCD) { - unsigned long did = __mfdr(DBGREG_DID); - printk("chip: 0x%03lx:0x%04lx rev %lu\n", + unsigned long did = ocd_read(DID); + printk(KERN_CONT "chip: 0x%03lx:0x%04lx rev %lu\n", (did >> 1) & 0x7ff, (did >> 12) & 0x7fff, (did >> 28) & 0xf); } else { - printk("cpu: arch %u r%u / core %u r%u\n", + printk(KERN_CONT "cpu: arch %u r%u / core %u r%u\n", current_cpu_data.arch_type, current_cpu_data.arch_revision, current_cpu_data.cpu_type, @@ -56,7 +61,7 @@ void NORET_TYPE die(const char *str, struct pt_regs *regs, long err) show_regs_log_lvl(regs, KERN_EMERG); show_stack_log_lvl(current, regs->sp, regs, KERN_EMERG); bust_spinlocks(0); - add_taint(TAINT_DIE); + add_taint(TAINT_DIE, LOCKDEP_NOW_UNRELIABLE); spin_unlock_irq(&die_lock); if (in_interrupt()) @@ -73,43 +78,44 @@ void _exception(long signr, struct pt_regs *regs, int code, { siginfo_t info; - if (!user_mode(regs)) + if (!user_mode(regs)) { + const struct exception_table_entry *fixup; + + /* Are we prepared to handle this kernel fault? */ + fixup = search_exception_tables(regs->pc); + if (fixup) { + regs->pc = fixup->fixup; + return; + } die("Unhandled exception in kernel mode", regs, signr); + } memset(&info, 0, sizeof(info)); info.si_signo = signr; info.si_code = code; info.si_addr = (void __user *)addr; force_sig_info(signr, &info, current); - - /* - * Init gets no signals that it doesn't have a handler for. - * That's all very well, but if it has caused a synchronous - * exception and we ignore the resulting signal, it will just - * generate the same exception over and over again and we get - * nowhere. Better to kill it and let the kernel panic. - */ - if (is_init(current)) { - __sighandler_t handler; - - spin_lock_irq(¤t->sighand->siglock); - handler = current->sighand->action[signr-1].sa.sa_handler; - spin_unlock_irq(¤t->sighand->siglock); - if (handler == SIG_DFL) { - /* init has generated a synchronous exception - and it doesn't have a handler for the signal */ - printk(KERN_CRIT "init has generated signal %ld " - "but has no handler for it\n", signr); - do_exit(signr); - } - } } asmlinkage void do_nmi(unsigned long ecr, struct pt_regs *regs) { - printk(KERN_ALERT "Got Non-Maskable Interrupt, dumping regs\n"); - show_regs_log_lvl(regs, KERN_ALERT); - show_stack_log_lvl(current, regs->sp, regs, KERN_ALERT); + int ret; + + nmi_enter(); + + ret = notify_die(DIE_NMI, "NMI", regs, 0, ecr, SIGINT); + switch (ret) { + case NOTIFY_OK: + case NOTIFY_STOP: + break; + case NOTIFY_BAD: + die("Fatal Non-Maskable Interrupt", regs, SIGINT); + default: + printk(KERN_ALERT "Got NMI, but nobody cared. Disabling...\n"); + nmi_disable(); + break; + } + nmi_exit(); } asmlinkage void do_critical_exception(unsigned long ecr, struct pt_regs *regs) @@ -163,6 +169,7 @@ static int do_cop_absent(u32 insn) return 0; } +#ifdef CONFIG_BUG int is_valid_bugaddr(unsigned long pc) { unsigned short opcode; @@ -174,6 +181,7 @@ int is_valid_bugaddr(unsigned long pc) return opcode == AVR32_BUG_OPCODE; } +#endif asmlinkage void do_illegal_opcode(unsigned long ecr, struct pt_regs *regs) { @@ -182,6 +190,7 @@ asmlinkage void do_illegal_opcode(unsigned long ecr, struct pt_regs *regs) void __user *pc; long code; +#ifdef CONFIG_BUG if (!user_mode(regs) && (ecr == ECR_ILLEGAL_OPCODE)) { enum bug_trap_type type; @@ -196,6 +205,7 @@ asmlinkage void do_illegal_opcode(unsigned long ecr, struct pt_regs *regs) die("Kernel BUG", regs, SIGKILL); } } +#endif local_irq_enable(); |