/* SPDX-License-Identifier: GPL-2.0 */ #ifndef __S390_EXTABLE_H #define __S390_EXTABLE_H /* * The exception table consists of pairs of addresses: the first is the * address of an instruction that is allowed to fault, and the second is * the address at which the program should continue. No registers are * modified, so it is entirely up to the continuation code to figure out * what to do. * * All the routines below use bits of fixup code that are out of line * with the main instruction path. This means when everything is well, * we don't even have to jump over them. Further, they do not intrude * on our cache or tlb entries. */ struct exception_table_entry { int insn, fixup; }; extern struct exception_table_entry *__start_dma_ex_table; extern struct exception_table_entry *__stop_dma_ex_table; const struct exception_table_entry *s390_search_extables(unsigned long addr); static inline unsigned long extable_fixup(const struct exception_table_entry *x) { return (unsigned long)&x->fixup + x->fixup; } #define ARCH_HAS_RELATIVE_EXTABLE #endif