Commit | Line | Data |
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6d48583b HH |
1 | #include <linux/module.h> |
2 | #include <linux/spinlock.h> | |
3 | #include <asm/uaccess.h> | |
4 | ||
5 | ||
6 | int 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) { | |
fe40c0af HS |
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 | } | |
6d48583b HH |
32 | regs->ip = fixup->fixup; |
33 | return 1; | |
34 | } | |
35 | ||
36 | return 0; | |
37 | } |