gdbserver: LoongArch: Add hardware watchpoint/breakpoint support

LoongArch defines hardware watchpoint functions for fetch and load/store
operations, the related support for gdb was added in the following two

  commit c1cdee0e2c17 ("gdb: LoongArch: Add support for hardware watchpoint")
  commit 6ced1278fc00 ("gdb: LoongArch: Add support for hardware breakpoint")

Now, add hardware watchpoint and breakpoint support for gdbserver on
LoongArch.

Here is a simple example

$ cat test.c
  #include <stdio.h>
  int a = 0;
  int b = 0;
  int main()
  {
    printf("start test\n");
    a = 1;
    printf("a = %d\n", a);
    a = 2;
    printf("a = %d\n", a);
    b = 2;
    printf("b = %d\n", b);
    return 0;
  }
$ gcc -g test.c -o test

Execute on the target machine:

$ gdbserver 192.168.1.100:1234 ./test

Execute on the host machine:

$ gdb ./test
...
(gdb) target remote 192.168.1.100:1234
...
(gdb) b main
Breakpoint 1 at 0x1200006b8: file test.c, line 6.
(gdb) c
Continuing.
...
Breakpoint 1, main () at test.c:6
6	    printf("start test\n");
(gdb) watch a
Hardware watchpoint 2: a
(gdb) hbreak 11
Hardware assisted breakpoint 3 at 0x120000700: file test.c, line 11.
(gdb) c
Continuing.

Hardware watchpoint 2: a

Old value = 0
New value = 1
main () at test.c:8
8	    printf("a = %d\n", a);
(gdb) c
Continuing.

Hardware watchpoint 2: a

Old value = 1
New value = 2
main () at test.c:10
10	    printf("a = %d\n", a);
(gdb) c
Continuing.

Breakpoint 3, main () at test.c:11
11	    b = 2;
(gdb) c
Continuing.
[Inferior 1 (process 696656) exited normally]

Output on the target machine:

Process ./test created; pid = 696708
Listening on port 1234
Remote debugging from host 192.168.1.200, port 60742
start test
a = 1
a = 2
b = 2

Child exited with status 0

Signed-off-by: Hui Li <lihui@loongson.cn>
Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>

0 files changed, 0 insertions, 0 deletions