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Vol. 3 16-3
DEBUGGING, PROFILING BRANCHES AND TIME-STAMP COUNTER
• Whether the breakpoint condition was present when the debug exception was
generated.
The following paragraphs describe the functions of flags and fields in the debug
registers.
Figure 16-1. Debug Registers
31
24
23
22
21 20 19 16
15
13
14 12
11
87
0
DR7
L
Reserved
0
123456
910
1718
252627282930
G
0
L
1
L
2
L
3
G
3
L
E
G
E
G
2
G
1
0 0
G
D
R/W
0
LEN
0
R/W
1
LEN
1
R/W
2
LEN
2
R/W
3
LEN
3
31
16
15
13
14 12 11
8
7
0
DR6
B
0
123456
910
B
1
B
2
B
3
0111111111
B
D
B
S
B
T
31
0
DR5
31
0
DR4
31
0
DR3
Breakpoint 3 Linear Address
31
0
DR2Breakpoint 2 Linear Address
31
0
DR1
Breakpoint 1 Linear Address
31
0
DR0Breakpoint 0 Linear Address
001
Reserved (set to 1)