Register 15: Link Register (LR)
The
Link Register (LR
) is register R14, and it stores the return information for subroutines, function
calls, and exceptions. The Link Register can be accessed from either privileged or unprivileged
mode.
EXC_RETURN
is loaded into the
LR
on exception entry. See Table 2-10 on page 123 for the values
and description.
Link Register (LR)
Type RW, reset 0xFFFF.FFFF
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
LINK
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
Type
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
Reset
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
LINK
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
Type
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
Reset
Description
Reset
Type
Name
Bit/Field
This field is the return address.
0xFFFF.FFFF
RW
LINK
31:0
June 18, 2014
90
Texas Instruments-Production Data
The Cortex-M4F Processor