include/asm-generic/extable.h

   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