1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef __ASM_EXTABLE_H
3 #define __ASM_EXTABLE_H
4
5 /*
6 * The exception table consists of pairs of relative offsets: the first
7 * is the relative offset to an instruction that is allowed to fault,
8 * and the second is the relative offset at which the program should
9 * continue. No registers are modified, so it is entirely up to the
10 * continuation code to figure out what to do.
11 *
12 * All the routines below use bits of fixup code that are out of line
13 * with the main instruction path. This means when everything is well,
14 * we don't even have to jump over them. Further, they do not intrude
15 * on our cache or tlb entries.
16 */
17
18 struct exception_table_entry
19 {
20 int insn, fixup;
21 };
22
23 #define ARCH_HAS_RELATIVE_EXTABLE
24
25 extern int fixup_exception(struct pt_regs *regs);
26 #endif