1#include <linux/module.h> 2#include <linux/spinlock.h> 3#include <asm/uaccess.h> 4 5 6int fixup_exception(struct pt_regs *regs) 7{ 8 const struct exception_table_entry *fixup; 9 10#ifdef CONFIG_PNPBIOS 11 if (unlikely(SEGMENT_IS_PNP_CODE(regs->cs))) { 12 extern u32 pnp_bios_fault_eip, pnp_bios_fault_esp; 13 extern u32 pnp_bios_is_utter_crap; 14 pnp_bios_is_utter_crap = 1; 15 printk(KERN_CRIT "PNPBIOS fault.. attempting recovery.\n"); 16 __asm__ volatile( 17 "movl %0, %%esp\n\t" 18 "jmp *%1\n\t" 19 : : "g" (pnp_bios_fault_esp), "g" (pnp_bios_fault_eip)); 20 panic("do_trap: can't hit this"); 21 } 22#endif 23 24 fixup = search_exception_tables(regs->ip); 25 if (fixup) { 26 /* If fixup is less than 16, it means uaccess error */ 27 if (fixup->fixup < 16) { 28 current_thread_info()->uaccess_err = -EFAULT; 29 regs->ip += fixup->fixup; 30 return 1; 31 } 32 regs->ip = fixup->fixup; 33 return 1; 34 } 35 36 return 0; 37} 38