/* SPDX-License-Identifier: GPL-2.0 */ #ifndef _ASM_X86_EXTABLE_H #define _ASM_X86_EXTABLE_H /* * The exception table consists of triples of addresses relative to the * exception table entry itself. The first address is of an instruction * that is allowed to fault, the second is the target at which the program * should continue. The third is a handler function to deal with the fault * caused by the instruction in the first field. * * 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, handler; }; struct pt_regs; #define ARCH_HAS_RELATIVE_EXTABLE #define swap_ex_entry_fixup(a, b, tmp, delta) \ do { \ (a)->fixup = (b)->fixup + (delta); \ (b)->fixup = (tmp).fixup - (delta); \ (a)->handler = (b)->handler + (delta); \ (b)->handler = (tmp).handler - (delta); \ } while (0) extern int fixup_exception(struct pt_regs *regs, int trapnr); extern int fixup_bug(struct pt_regs *regs, int trapnr); extern bool ex_has_fault_handler(unsigned long ip); extern void early_fixup_exception(struct pt_regs *regs, int trapnr); #endif