xref: /openbmc/linux/include/asm-generic/extable.h (revision b2441318)
1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef __ASM_GENERIC_EXTABLE_H
3 #define __ASM_GENERIC_EXTABLE_H
4 
5 /*
6  * The exception table consists of pairs of addresses: the first is the
7  * address of an instruction that is allowed to fault, and the second is
8  * the address at which the program should continue.  No registers are
9  * modified, so it is entirely up to the continuation code to figure out
10  * 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 	unsigned long insn, fixup;
21 };
22 
23 
24 struct pt_regs;
25 extern int fixup_exception(struct pt_regs *regs);
26 
27 #endif
28