[mirror_ubuntu-bionic-kernel.git] / arch / x86 / um / fault.c

/* 
 * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
 * Licensed under the GPL
 */

#include <sysdep/ptrace.h>

/* These two are from asm-um/uaccess.h and linux/module.h, check them. */
struct exception_table_entry
{
	unsigned long insn;
	unsigned long fixup;
};

const struct exception_table_entry *search_exception_tables(unsigned long add);

/* Compare this to arch/i386/mm/extable.c:fixup_exception() */
int arch_fixup(unsigned long address, struct uml_pt_regs *regs)
{
	const struct exception_table_entry *fixup;

	fixup = search_exception_tables(address);
	if (fixup) {
		UPT_IP(regs) = fixup->fixup;
		return 1;
	}
	return 0;
}
Commit	Line	Data
1da177e4	1	/*
ba180fd4	2	* Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
1da177e4 LT	3	* Licensed under the GPL
	4	*/
	5
37185b33	6	#include <sysdep/ptrace.h>
1da177e4 LT	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() */
77bf4400	18	int arch_fixup(unsigned long address, struct uml_pt_regs *regs)
1da177e4	19	{
1da177e4 LT	20	const struct exception_table_entry *fixup;
	21
	22	fixup = search_exception_tables(address);
7be0b065	23	if (fixup) {
5d86456d	24	UPT_IP(regs) = fixup->fixup;
ba180fd4	25	return 1;
1da177e4	26	}
ba180fd4	27	return 0;
1da177e4	28	}