xref: /openbmc/linux/arch/x86/um/fault.c (revision bbb774d9)
1 /*
2  * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
3  * Licensed under the GPL
4  */
5 
6 #include <sysdep/ptrace.h>
7 
8 /* These two are from asm-um/uaccess.h and linux/module.h, check them. */
9 struct exception_table_entry
10 {
11 	unsigned long insn;
12 	unsigned long fixup;
13 };
14 
15 const struct exception_table_entry *search_exception_tables(unsigned long add);
16 
17 /* Compare this to arch/i386/mm/extable.c:fixup_exception() */
18 int arch_fixup(unsigned long address, struct uml_pt_regs *regs)
19 {
20 	const struct exception_table_entry *fixup;
21 
22 	fixup = search_exception_tables(address);
23 	if (fixup) {
24 		UPT_IP(regs) = fixup->fixup;
25 		return 1;
26 	}
27 	return 0;
28 }
29