xref: /openbmc/linux/arch/arc/include/asm/kprobes.h (revision 293d5b43)
1 /*
2  * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
3  *
4  * This program is free software; you can redistribute it and/or modify
5  * it under the terms of the GNU General Public License version 2 as
6  * published by the Free Software Foundation.
7  */
8 
9 #ifndef _ARC_KPROBES_H
10 #define _ARC_KPROBES_H
11 
12 #ifdef CONFIG_KPROBES
13 
14 typedef u16 kprobe_opcode_t;
15 
16 #define UNIMP_S_INSTRUCTION 0x79e0
17 #define TRAP_S_2_INSTRUCTION 0x785e
18 
19 #define MAX_INSN_SIZE   8
20 #define MAX_STACK_SIZE  64
21 
22 struct arch_specific_insn {
23 	int is_short;
24 	kprobe_opcode_t *t1_addr, *t2_addr;
25 	kprobe_opcode_t t1_opcode, t2_opcode;
26 };
27 
28 #define flush_insn_slot(p)  do {  } while (0)
29 
30 #define kretprobe_blacklist_size    0
31 
32 struct kprobe;
33 
34 void arch_remove_kprobe(struct kprobe *p);
35 
36 int kprobe_exceptions_notify(struct notifier_block *self,
37 			     unsigned long val, void *data);
38 
39 struct prev_kprobe {
40 	struct kprobe *kp;
41 	unsigned long status;
42 };
43 
44 struct kprobe_ctlblk {
45 	unsigned int kprobe_status;
46 	struct pt_regs jprobe_saved_regs;
47 	char jprobes_stack[MAX_STACK_SIZE];
48 	struct prev_kprobe prev_kprobe;
49 };
50 
51 int kprobe_fault_handler(struct pt_regs *regs, unsigned long cause);
52 void kretprobe_trampoline(void);
53 void trap_is_kprobe(unsigned long address, struct pt_regs *regs);
54 #else
55 static void trap_is_kprobe(unsigned long address, struct pt_regs *regs)
56 {
57 }
58 #endif
59 
60 #endif
61