1 files changed, 71 insertions, 0 deletions

diff --git a/arch/sh/kernel/traps.c b/arch/sh/kernel/traps.c
index a87e58a9e38..72246bc0688 100644
--- a/arch/sh/kernel/traps.c
+++ b/arch/sh/kernel/traps.c
@@ -6,9 +6,80 @@
 #include <linux/sched.h>
 #include <linux/uaccess.h>
 #include <linux/hardirq.h>
+#include <linux/kernel.h>
+#include <linux/kexec.h>
+#include <linux/module.h>
 #include <asm/unwinder.h>
 #include <asm/traps.h>
 
+static DEFINE_SPINLOCK(die_lock);
+
+void die(const char *str, struct pt_regs *regs, long err)
+{
+        static int die_counter;
+
+        oops_enter();
+
+        spin_lock_irq(&die_lock);
+        console_verbose();
+        bust_spinlocks(1);
+
+        printk("%s: %04lx [#%d]\n", str, err & 0xffff, ++die_counter);
+        print_modules();
+        show_regs(regs);
+
+        printk("Process: %s (pid: %d, stack limit = %p)\n", current->comm,
+                        task_pid_nr(current), task_stack_page(current) + 1);
+
+        if (!user_mode(regs) || in_interrupt())
+                dump_mem("Stack: ", regs->regs[15], THREAD_SIZE +
+                         (unsigned long)task_stack_page(current));
+
+        notify_die(DIE_OOPS, str, regs, err, 255, SIGSEGV);
+
+        bust_spinlocks(0);
+        add_taint(TAINT_DIE);
+        spin_unlock_irq(&die_lock);
+        oops_exit();
+
+        if (kexec_should_crash(current))
+                crash_kexec(regs);
+
+        if (in_interrupt())
+                panic("Fatal exception in interrupt");
+
+        if (panic_on_oops)
+                panic("Fatal exception");
+
+        do_exit(SIGSEGV);
+}
+
+void die_if_kernel(const char *str, struct pt_regs *regs, long err)
+{
+        if (!user_mode(regs))
+                die(str, regs, err);
+}
+
+/*
+ * try and fix up kernelspace address errors
+ * - userspace errors just cause EFAULT to be returned, resulting in SEGV
+ * - kernel/userspace interfaces cause a jump to an appropriate handler
+ * - other kernel errors are bad
+ */
+void die_if_no_fixup(const char *str, struct pt_regs *regs, long err)
+{
+        if (!user_mode(regs)) {
+                const struct exception_table_entry *fixup;
+                fixup = search_exception_tables(regs->pc);
+                if (fixup) {
+                        regs->pc = fixup->fixup;
+                        return;
+                }
+
+                die(str, regs, err);
+        }
+}
+
 #ifdef CONFIG_GENERIC_BUG
 static void handle_BUG(struct pt_regs *regs)
 {