1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
|
/*
* Copyright (C) 2004 Paul Mackerras <paulus@au.ibm.com>, IBM
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*/
struct pt_regs;
/*
* We don't allow single-stepping an mtmsrd that would clear
* MSR_RI, since that would make the exception unrecoverable.
* Since we need to single-step to proceed from a breakpoint,
* we don't allow putting a breakpoint on an mtmsrd instruction.
* Similarly we don't allow breakpoints on rfid instructions.
* These macros tell us if an instruction is a mtmsrd or rfid.
* Note that IS_MTMSRD returns true for both an mtmsr (32-bit)
* and an mtmsrd (64-bit).
*/
#define IS_MTMSRD(instr) (((instr) & 0xfc0007be) == 0x7c000124)
#define IS_RFID(instr) (((instr) & 0xfc0007fe) == 0x4c000024)
#define IS_RFI(instr) (((instr) & 0xfc0007fe) == 0x4c000064)
/* Emulate instructions that cause a transfer of control. */
extern int emulate_step(struct pt_regs *regs, unsigned int instr);
enum instruction_type {
COMPUTE, /* arith/logical/CR op, etc. */
LOAD,
LOAD_MULTI,
LOAD_FP,
LOAD_VMX,
LOAD_VSX,
STORE,
STORE_MULTI,
STORE_FP,
STORE_VMX,
STORE_VSX,
LARX,
STCX,
BRANCH,
MFSPR,
MTSPR,
CACHEOP,
BARRIER,
SYSCALL,
MFMSR,
MTMSR,
RFI,
INTERRUPT,
UNKNOWN
};
#define INSTR_TYPE_MASK 0x1f
/* Load/store flags, ORed in with type */
#define SIGNEXT 0x20
#define UPDATE 0x40 /* matches bit in opcode 31 instructions */
#define BYTEREV 0x80
/* Cacheop values, ORed in with type */
#define CACHEOP_MASK 0x700
#define DCBST 0
#define DCBF 0x100
#define DCBTST 0x200
#define DCBT 0x300
#define ICBI 0x400
/* Size field in type word */
#define SIZE(n) ((n) << 8)
#define GETSIZE(w) ((w) >> 8)
#define MKOP(t, f, s) ((t) | (f) | SIZE(s))
struct instruction_op {
int type;
int reg;
unsigned long val;
/* For LOAD/STORE/LARX/STCX */
unsigned long ea;
int update_reg;
/* For MFSPR */
int spr;
};
extern int analyse_instr(struct instruction_op *op, struct pt_regs *regs,
unsigned int instr);
|
