FazBrowse GitHub Viewer
|
Trending
|
URL:
|
Home
Tools:
[Download Repo ZIP]
[View Raw Code]
[Original HTTPS Page]
patchdiff2/ppc.cpp at master · ldebug/patchdiff2 · GitHub
ldebug
/
patchdiff2
Public
forked from
filcab/patchdiff2
Notifications
You must be signed in to change notification settings
Fork
0
Star
1
Code
Pull requests
0
Actions
Projects
Wiki
Security and quality
0
Insights
Additional navigation options
Code
Pull requests
Actions
Projects
Wiki
Security and quality
Insights
Expand file tree
Breadcrumbs
patchdiff2
/
ppc.cpp
Copy path
More file actions
More file actions
Latest commit
History
History
History
128 lines (99 loc) · 2.75 KB
Breadcrumbs
patchdiff2
/
ppc.cpp
Copy path
File metadata and controls
128 lines (99 loc) · 2.75 KB
Raw
Copy raw file
Download raw file
Open symbols panel
Edit and raw actions
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
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
/*
Patchdiff2
Portions (C) 2010 - 2011 Nicolas Pouvesle
Portions (C) 2007 - 2009 Tenable Network Security, Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License version 2 as
published by the Free Software Foundation.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#
include
"
precomp.hpp
"
#
include
"
ppc.hpp
"
#
include
"
patchdiff.hpp
"
extern
cpu_t
patchdiff_cpu;
/*
------------------------------------------------
*/
/*
function : ppc_is_nop
*/
/*
arguments: unsigned char _byte
*/
/*
description: detects if instruction is a nop
*/
/*
(mr rA, rA)
*/
/*
------------------------------------------------
*/
bool
ppc_is_nop
(
unsigned
char
_byte,
ea_t
ea)
{
unsigned
char
s, a, b, rc;
unsigned
short
v;
unsigned
long
l;
_byte =
get_byte
(ea) >>
2
;
//
or rS, rA, rB
if
(_byte ==
31
)
{
v =
get_word
(ea);
s = (v >>
5
) &
0x1F
;
a = v &
0x1F
;
if
(s == a)
{
v =
get_word
(ea+
2
);
b = v >>
11
;
rc = v &
1
;
v = (v >>
1
) &
0x3FF
;
if
(b == s && v ==
444
&& !rc)
return
true
;
}
}
//
nop: ori 0,0,0
else
if
(_byte ==
24
)
{
l =
get_long
(ea);
if
(l ==
0x60000000
)
return
true
;
}
return
false
;
}
/*
------------------------------------------------
*/
/*
function : ppc_remove_instr
*/
/*
arguments: unsigned char byte, ea_t ea
*/
/*
description: Returns true is the instruction
*/
/*
must be ignored
*/
/*
------------------------------------------------
*/
bool
ppc_remove_instr
(
unsigned
char
byte,
ea_t
ea)
{
if
(
ppc_is_nop
(byte, ea))
return
true
;
/*
// if not addi (li)
if (byte != 14)
return false;
// removes li, rD, 0 (addi rD, rA, 0 with rA == 0)
b = get_byte(ea+1) & 0x1F;
if (!b)
{
s = get_word(ea+2);
if (s == 0)
return true;
}
*/
return
false
;
}
/*
------------------------------------------------
*/
/*
function : ppc_get_byte
*/
/*
arguments: unsigned char _byte
*/
/*
description: Returns opcode
*/
/*
------------------------------------------------
*/
unsigned
char
ppc_get_byte
(
ea_t
ea)
{
unsigned
char
byte;
unsigned
short
v;
byte =
get_byte
(ea) >>
2
;
if
(byte ==
31
)
{
v =
get_word
(ea+
2
);
v = (v >>
1
) &
0xFF
;
if
(v <
65
) v +=
65
;
byte = (
unsigned
char
)v;
}
return
byte;
}
Back
|
FazBrowse Home
|
New Git URL