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-rw-r--r--arch/i386/mm/extable.c36
1 files changed, 36 insertions, 0 deletions
diff --git a/arch/i386/mm/extable.c b/arch/i386/mm/extable.c
new file mode 100644
index 00000000000..f706449319c
--- /dev/null
+++ b/arch/i386/mm/extable.c
@@ -0,0 +1,36 @@
+/*
+ * linux/arch/i386/mm/extable.c
+ */
+
+#include <linux/config.h>
+#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((regs->xcs & ~15) == (GDT_ENTRY_PNPBIOS_BASE << 3)))
+ {
+ 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->eip);
+ if (fixup) {
+ regs->eip = fixup->fixup;
+ return 1;
+ }
+
+ return 0;
+}