xref: /openbmc/linux/arch/mips/include/asm/uprobes.h (revision ea036230)
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  */
19 typedef 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 
35 struct arch_uprobe {
36 	unsigned long	resume_epc;
37 	u32	insn[2];
38 	u32	ixol[2];
39 };
40 
41 struct arch_uprobe_task {
42 	unsigned long saved_trap_nr;
43 };
44 
45 #endif /* __ASM_UPROBES_H */
46