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
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
|
/*
Copyright (C) 2015 - 2015 Evan Teran
evan.teran@gmail.com
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.
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 "libHardwareBreakpoints.h"
#include "State.h"
namespace HardwareBreakpointsPlugin {
/**
* @brief validate_breakpoint
* @param bp_state
* @return
*/
BreakpointStatus validate_breakpoint(const BreakpointState &bp_state) {
if (bp_state.enabled) {
switch (bp_state.type) {
case 2:
case 1: {
const edb::address_t address_mask = (1u << bp_state.size) - 1;
if ((bp_state.addr & address_mask) != 0) {
return AlignmentError;
}
} break;
default:
break;
}
if (edb::v1::debuggeeIs32Bit()) {
if (bp_state.size == 3) {
return SizeError;
}
}
}
return Valid;
}
/**
* @brief breakpoint_state
* @param state
* @param num
* @return
*/
BreakpointState breakpoint_state(const State *state, int num) {
Q_ASSERT(num < RegisterCount);
const int N1 = 16 + (num * 4);
const int N2 = 18 + (num * 4);
BreakpointState bp_state;
// enabled
switch (num) {
case Register1:
bp_state.enabled = (state->debugRegister(7) & 0x00000001) != 0;
break;
case Register2:
bp_state.enabled = (state->debugRegister(7) & 0x00000004) != 0;
break;
case Register3:
bp_state.enabled = (state->debugRegister(7) & 0x00000010) != 0;
break;
case Register4:
bp_state.enabled = (state->debugRegister(7) & 0x00000040) != 0;
break;
}
// address
bp_state.addr = state->debugRegister(num);
// type
switch ((state->debugRegister(7) >> N1) & 0x03) {
case 0x00:
bp_state.type = 0;
break;
case 0x01:
bp_state.type = 1;
break;
case 0x03:
bp_state.type = 2;
break;
default:
bp_state.type = -1;
Q_ASSERT(0 && "Internal Error");
}
// size
switch ((state->debugRegister(7) >> N2) & 0x03) {
case 0x00:
bp_state.size = 0;
break;
case 0x01:
bp_state.size = 1;
break;
case 0x03:
bp_state.size = 2;
break;
case 0x02:
bp_state.size = 3;
}
return bp_state;
}
/**
* @brief set_breakpoint_state
* @param state
* @param num
* @param bp_state
*/
void set_breakpoint_state(State *state, int num, const BreakpointState &bp_state) {
const int N1 = 16 + (num * 4);
const int N2 = 18 + (num * 4);
// default to disabled
state->setDebugRegister(7, (state->debugRegister(7) & ~(0x01ULL << (num * 2))));
if (bp_state.enabled) {
// set the address
state->setDebugRegister(num, bp_state.addr);
// enable this breakpoint
state->setDebugRegister(7, state->debugRegister(7) | (0x01ULL << (num * 2)));
// setup the type
switch (bp_state.type) {
case 2:
// read/write
state->setDebugRegister(7, (state->debugRegister(7) & ~(0x03ULL << N1)) | (0x03ULL << N1));
break;
case 1:
// write
state->setDebugRegister(7, (state->debugRegister(7) & ~(0x03ULL << N1)) | (0x01ULL << N1));
break;
case 0:
// execute
state->setDebugRegister(7, (state->debugRegister(7) & ~(0x03ULL << N1)) | (0x00ULL << N1));
break;
}
if (bp_state.type != 0) {
// setup the size
switch (bp_state.size) {
case 3:
// 8 bytes
Q_ASSERT(edb::v1::debuggeeIs64Bit());
state->setDebugRegister(7, (state->debugRegister(7) & ~(0x03ULL << N2)) | (0x02ULL << N2));
break;
case 2:
// 4 bytes
state->setDebugRegister(7, (state->debugRegister(7) & ~(0x03ULL << N2)) | (0x03ULL << N2));
break;
case 1:
// 2 bytes
state->setDebugRegister(7, (state->debugRegister(7) & ~(0x03ULL << N2)) | (0x01ULL << N2));
break;
case 0:
// 1 byte
state->setDebugRegister(7, (state->debugRegister(7) & ~(0x03ULL << N2)) | (0x00ULL << N2));
break;
}
} else {
state->setDebugRegister(7, (state->debugRegister(7) & ~(0x03ULL << N2)));
}
}
}
}
|
