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c1bf207d DD |
1 | /* |
2 | * Kernel Probes (KProbes) | |
3 | * include/asm-mips/kprobes.h | |
4 | * | |
5 | * Copyright 2006 Sony Corp. | |
6 | * Copyright 2010 Cavium Networks | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; version 2 of the License. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program; if not, write to the Free Software | |
19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
20 | */ | |
21 | ||
22 | #ifndef _ASM_KPROBES_H | |
23 | #define _ASM_KPROBES_H | |
24 | ||
25 | #include <linux/ptrace.h> | |
26 | #include <linux/types.h> | |
27 | ||
28 | #include <asm/cacheflush.h> | |
29 | #include <asm/kdebug.h> | |
30 | #include <asm/inst.h> | |
31 | ||
70342287 | 32 | #define __ARCH_WANT_KPROBES_INSN_SLOT |
c1bf207d DD |
33 | |
34 | struct kprobe; | |
35 | struct pt_regs; | |
36 | ||
37 | typedef union mips_instruction kprobe_opcode_t; | |
38 | ||
39 | #define MAX_INSN_SIZE 2 | |
40 | ||
41 | #define flush_insn_slot(p) \ | |
42 | do { \ | |
43 | flush_icache_range((unsigned long)p->addr, \ | |
44 | (unsigned long)p->addr + \ | |
45 | (MAX_INSN_SIZE * sizeof(kprobe_opcode_t))); \ | |
46 | } while (0) | |
47 | ||
48 | ||
49 | #define kretprobe_blacklist_size 0 | |
50 | ||
51 | void arch_remove_kprobe(struct kprobe *p); | |
52 | ||
53 | /* Architecture specific copy of original instruction*/ | |
54 | struct arch_specific_insn { | |
55 | /* copy of the original instruction */ | |
56 | kprobe_opcode_t *insn; | |
57 | }; | |
58 | ||
59 | struct prev_kprobe { | |
60 | struct kprobe *kp; | |
61 | unsigned long status; | |
62 | unsigned long old_SR; | |
63 | unsigned long saved_SR; | |
64 | unsigned long saved_epc; | |
65 | }; | |
66 | ||
67 | #define MAX_JPROBES_STACK_SIZE 128 | |
68 | #define MAX_JPROBES_STACK_ADDR \ | |
69 | (((unsigned long)current_thread_info()) + THREAD_SIZE - 32 - sizeof(struct pt_regs)) | |
70 | ||
71 | #define MIN_JPROBES_STACK_SIZE(ADDR) \ | |
72 | ((((ADDR) + MAX_JPROBES_STACK_SIZE) > MAX_JPROBES_STACK_ADDR) \ | |
73 | ? MAX_JPROBES_STACK_ADDR - (ADDR) \ | |
74 | : MAX_JPROBES_STACK_SIZE) | |
75 | ||
76 | ||
6457a396 MS |
77 | #define SKIP_DELAYSLOT 0x0001 |
78 | ||
c1bf207d DD |
79 | /* per-cpu kprobe control block */ |
80 | struct kprobe_ctlblk { | |
81 | unsigned long kprobe_status; | |
82 | unsigned long kprobe_old_SR; | |
83 | unsigned long kprobe_saved_SR; | |
84 | unsigned long kprobe_saved_epc; | |
85 | unsigned long jprobe_saved_sp; | |
86 | struct pt_regs jprobe_saved_regs; | |
6457a396 MS |
87 | /* Per-thread fields, used while emulating branches */ |
88 | unsigned long flags; | |
89 | unsigned long target_epc; | |
c1bf207d DD |
90 | u8 jprobes_stack[MAX_JPROBES_STACK_SIZE]; |
91 | struct prev_kprobe prev_kprobe; | |
92 | }; | |
93 | ||
94 | extern int kprobe_exceptions_notify(struct notifier_block *self, | |
95 | unsigned long val, void *data); | |
96 | ||
97 | #endif /* _ASM_KPROBES_H */ |