x86/um/fault.c

8c2ecf20Sopenharmony_ci/*
8c2ecf20Sopenharmony_ci * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
8c2ecf20Sopenharmony_ci * Licensed under the GPL
8c2ecf20Sopenharmony_ci */
8c2ecf20Sopenharmony_ci
8c2ecf20Sopenharmony_ci#include <sysdep/ptrace.h>
8c2ecf20Sopenharmony_ci
8c2ecf20Sopenharmony_ci/* These two are from asm-um/uaccess.h and linux/module.h, check them. */
8c2ecf20Sopenharmony_cistruct exception_table_entry
8c2ecf20Sopenharmony_ci{
8c2ecf20Sopenharmony_ci	unsigned long insn;
8c2ecf20Sopenharmony_ci	unsigned long fixup;
8c2ecf20Sopenharmony_ci};
8c2ecf20Sopenharmony_ci
8c2ecf20Sopenharmony_ciconst struct exception_table_entry *search_exception_tables(unsigned long add);
8c2ecf20Sopenharmony_ci
8c2ecf20Sopenharmony_ci/* Compare this to arch/i386/mm/extable.c:fixup_exception() */
8c2ecf20Sopenharmony_ciint arch_fixup(unsigned long address, struct uml_pt_regs *regs)
8c2ecf20Sopenharmony_ci{
8c2ecf20Sopenharmony_ci	const struct exception_table_entry *fixup;
8c2ecf20Sopenharmony_ci
8c2ecf20Sopenharmony_ci	fixup = search_exception_tables(address);
8c2ecf20Sopenharmony_ci	if (fixup) {
8c2ecf20Sopenharmony_ci		UPT_IP(regs) = fixup->fixup;
8c2ecf20Sopenharmony_ci		return 1;
8c2ecf20Sopenharmony_ci	}
8c2ecf20Sopenharmony_ci	return 0;
8c2ecf20Sopenharmony_ci}