1/*
 2 * This file is subject to the terms and conditions of the GNU General Public
 3 * License.  See the file "COPYING" in the main directory of this archive
 4 * for more details.
 5 */
 6#ifndef __ASM_UPROBES_H
 7#define __ASM_UPROBES_H
 8
 9#include <linux/notifier.h>
10#include <linux/types.h>
11
12#include <asm/break.h>
13#include <asm/inst.h>
14
15/*
16 * We want this to be defined as union mips_instruction but that makes the
17 * generic code blow up.
18 */
19typedef u32 uprobe_opcode_t;
20
21/*
22 * Classic MIPS (note this implementation doesn't consider microMIPS yet)
23 * instructions are always 4 bytes but in order to deal with branches and
24 * their delay slots, we treat instructions as having 8 bytes maximum.
25 */
26#define MAX_UINSN_BYTES			8
27#define UPROBE_XOL_SLOT_BYTES		128	/* Max. cache line size */
28
29#define UPROBE_BRK_UPROBE		0x000d000d	/* break 13 */
30#define UPROBE_BRK_UPROBE_XOL		0x000e000d	/* break 14 */
31
32#define UPROBE_SWBP_INSN		UPROBE_BRK_UPROBE
33#define UPROBE_SWBP_INSN_SIZE		4
34
35struct arch_uprobe {
36	unsigned long	resume_epc;
37	u32	insn[2];
38	u32	ixol[2];
39};
40
41struct arch_uprobe_task {
42	unsigned long saved_trap_nr;
43};
44
45#endif /* __ASM_UPROBES_H */