| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * linux/arch/i386/mm/extable.c |
| 3 | */ |
| 4 | |
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5 | #include <linux/module.h> |
| 6 | #include <linux/spinlock.h> |
| 7 | #include <asm/uaccess.h> |
| 8 | |
| 9 | int fixup_exception(struct pt_regs *regs) |
| 10 | { |
| 11 | const struct exception_table_entry *fixup; |
| 12 | |
| 13 | #ifdef CONFIG_PNPBIOS |
| 14 | if (unlikely((regs->xcs & ~15) == (GDT_ENTRY_PNPBIOS_BASE << 3))) |
| 15 | { |
| 16 | extern u32 pnp_bios_fault_eip, pnp_bios_fault_esp; |
| 17 | extern u32 pnp_bios_is_utter_crap; |
| 18 | pnp_bios_is_utter_crap = 1; |
| 19 | printk(KERN_CRIT "PNPBIOS fault.. attempting recovery.\n"); |
| 20 | __asm__ volatile( |
| 21 | "movl %0, %%esp\n\t" |
| 22 | "jmp *%1\n\t" |
| 23 | : : "g" (pnp_bios_fault_esp), "g" (pnp_bios_fault_eip)); |
| 24 | panic("do_trap: can't hit this"); |
| 25 | } |
| 26 | #endif |
| 27 | |
| 28 | fixup = search_exception_tables(regs->eip); |
| 29 | if (fixup) { |
| 30 | regs->eip = fixup->fixup; |
| 31 | return 1; |
| 32 | } |
| 33 | |
| 34 | return 0; |
| 35 | } |