1 files changed, 37 insertions, 0 deletions
diff --git a/arch/x86/mm/extable.c b/arch/x86/mm/extable.c
new file mode 100644
index 00000000..1fb85dbe
--- /dev/null
+++ b/arch/x86/mm/extable.c
@@ -0,0 +1,37 @@
+#include <linux/module.h>
+#include <linux/spinlock.h>
+#include <asm/uaccess.h>
+
+
+int fixup_exception(struct pt_regs *regs)
+{
+	const struct exception_table_entry *fixup;
+
+#ifdef CONFIG_PNPBIOS
+	if (unlikely(SEGMENT_IS_PNP_CODE(regs->cs))) {
+		extern u32 pnp_bios_fault_eip, pnp_bios_fault_esp;
+		extern u32 pnp_bios_is_utter_crap;
+		pnp_bios_is_utter_crap = 1;
+		printk(KERN_CRIT "PNPBIOS fault.. attempting recovery.\n");
+		__asm__ volatile(
+			"movl %0, %%esp\n\t"
+			"jmp *%1\n\t"
+			: : "g" (pnp_bios_fault_esp), "g" (pnp_bios_fault_eip));
+		panic("do_trap: can't hit this");
+	}
+#endif
+
+	fixup = search_exception_tables(regs->ip);
+	if (fixup) {
+		/* If fixup is less than 16, it means uaccess error */
+		if (fixup->fixup < 16) {
+			current_thread_info()->uaccess_err = 1;
+			regs->ip += fixup->fixup;
+			return 1;
+		}
+		regs->ip = fixup->fixup;
+		return 1;
+	}
+
+	return 0;
+}