| #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 = -EFAULT; |
| regs->ip += fixup->fixup; |
| return 1; |
| } |
| regs->ip = fixup->fixup; |
| return 1; |
| } |
| |
| return 0; |
| } |