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- #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 bool ex_has_fault_handler(unsigned long ip);
- extern void early_fixup_exception(struct pt_regs *regs, int trapnr);
- #endif
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