xref: /openbmc/linux/include/asm-generic/extable.h (revision 981ab3f1)
1 #ifndef __ASM_GENERIC_EXTABLE_H
2 #define __ASM_GENERIC_EXTABLE_H
3 
4 /*
5  * The exception table consists of pairs of addresses: the first is the
6  * address of an instruction that is allowed to fault, and the second is
7  * the address at which the program should continue.  No registers are
8  * modified, so it is entirely up to the continuation code to figure out
9  * what to do.
10  *
11  * All the routines below use bits of fixup code that are out of line
12  * with the main instruction path.  This means when everything is well,
13  * we don't even have to jump over them.  Further, they do not intrude
14  * on our cache or tlb entries.
15  */
16 
17 struct exception_table_entry
18 {
19 	unsigned long insn, fixup;
20 };
21 
22 
23 struct pt_regs;
24 extern int fixup_exception(struct pt_regs *regs);
25 
26 #endif
27