1 #ifndef __S390_EXTABLE_H 2 #define __S390_EXTABLE_H 3 /* 4 * The exception table consists of pairs of addresses: the first is the 5 * address of an instruction that is allowed to fault, and the second is 6 * the address at which the program should continue. No registers are 7 * modified, so it is entirely up to the continuation code to figure out 8 * what to do. 9 * 10 * All the routines below use bits of fixup code that are out of line 11 * with the main instruction path. This means when everything is well, 12 * we don't even have to jump over them. Further, they do not intrude 13 * on our cache or tlb entries. 14 */ 15 16 struct exception_table_entry 17 { 18 int insn, fixup; 19 }; 20 21 static inline unsigned long extable_fixup(const struct exception_table_entry *x) 22 { 23 return (unsigned long)&x->fixup + x->fixup; 24 } 25 26 #define ARCH_HAS_RELATIVE_EXTABLE 27 28 #endif 29