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Hui Li 6ced1278fc gdb: LoongArch: Add support for hardware breakpoint 
LoongArch defines hardware watchpoint functions for fetch operations.
After the software configures the watchpoints for fetch, the processor
hardware will monitor the access addresses of the fetch operations and
trigger a watchpoint exception when the watchpoint setting conditions
are met.

Hardware watchpoints for fetch operations is used to implement hardware
breakpoint function on LoongArch. Refer to the following document for
hardware breakpoint.
https://loongson.github.io/LoongArch-Documentation/LoongArch-Vol1-EN.html#control-and-status-registers-related-to-watchpoints

A simple test is as follows:

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

without this patch:

lihui@bogon:~$ gdb test
...
(gdb) start
...
Temporary breakpoint 1, main () at test.c:5
5               printf("start test\n");
(gdb) hbreak 8
No hardware breakpoint support in the target.

with this patch:

lihui@bogon:~$ gdb test
...
(gdb) start
...

Temporary breakpoint 1, main () at test.c:5
5               printf("start test\n");
(gdb) hbreak 8
Hardware assisted breakpoint 2 at 0x1200006ec: file test.c, line 8.
(gdb) c
Continuing.
start test
a = 1

Breakpoint 2, main () at test.c:8
8               printf("end test\n");
(gdb) c
Continuing.
end test
[Inferior 1 (process 25378) exited normally]

Signed-off-by: Hui Li <lihui@loongson.cn>
Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
2024-06-25 05:50:29 +08:00
..
aout Update year range in copyright notice of binutils files 2024-01-04 22:58:12 +10:30
cgen Update year range in copyright notice of binutils files 2024-01-04 22:58:12 +10:30
coff riscv64-pei uninitialised data writing relocs 2024-01-25 08:41:14 +10:30
elf gdb: LoongArch: Add support for hardware breakpoint 2024-06-25 05:50:29 +08:00
gdb Update year range in copyright notice of binutils files 2024-01-04 22:58:12 +10:30
mach-o Update year range in copyright notice of binutils files 2024-01-04 22:58:12 +10:30
opcode aarch64: Add SME FP8 multiplication instructions 2024-06-24 16:50:28 +01:00
sim sim: Fix -Werror=shadow=local by changing mem to addr in sim_{read,write} 2024-01-22 14:22:30 +01:00
som Update year range in copyright notice of binutils files 2024-01-04 22:58:12 +10:30
vms Update year range in copyright notice of binutils files 2024-01-04 22:58:12 +10:30
alloca-conf.h Update year range in copyright notice of binutils files 2024-01-04 22:58:12 +10:30
ansidecl.h Update year range in copyright notice of binutils files 2024-01-04 22:58:12 +10:30
bfdlink.h Add --rosegment option to BFD linker to stop the '-z separate-code' from generating two read-only segments. 2024-06-13 15:10:15 +01:00
binary-io.h Update year range in copyright notice of binutils files 2024-01-04 22:58:12 +10:30
bout.h Update year range in copyright notice of binutils files 2024-01-04 22:58:12 +10:30
ChangeLog gdb: ignore -Wregister instead of -Wdeprecated-register 2024-04-07 22:57:39 -04:00
ChangeLog-0415
ChangeLog-2016
ChangeLog-2017
ChangeLog-2018
ChangeLog-2019
ChangeLog-2020
ChangeLog-9103
collectorAPI.h Update year range in copyright notice of binutils files 2024-01-04 22:58:12 +10:30
COPYING
COPYING3
ctf-api.h libctf, include: new functions for looking up enumerators 2024-06-18 13:20:32 +01:00
ctf.h Update year range in copyright notice of binutils files 2024-01-04 22:58:12 +10:30
demangle.h Import gcc commit 65388b28656d65595bdaf191df85af81c35ca63 which adds support for explicit object member function mangling. 2024-01-17 12:06:48 +00:00
diagnostics.h gdb: ignore -Wregister instead of -Wdeprecated-register 2024-04-07 22:57:39 -04:00
dis-asm.h Update year range in copyright notice of binutils files 2024-01-04 22:58:12 +10:30
dwarf2.def Update year range in copyright notice of binutils files 2024-01-04 22:58:12 +10:30
dwarf2.h Update year range in copyright notice of binutils files 2024-01-04 22:58:12 +10:30
dyn-string.h Update year range in copyright notice of binutils files 2024-01-04 22:58:12 +10:30
environ.h Update year range in copyright notice of binutils files 2024-01-04 22:58:12 +10:30
fibheap.h Update year range in copyright notice of binutils files 2024-01-04 22:58:12 +10:30
filenames.h Update year range in copyright notice of binutils files 2024-01-04 22:58:12 +10:30
floatformat.h Update year range in copyright notice of binutils files 2024-01-04 22:58:12 +10:30
fnmatch.h Update year range in copyright notice of binutils files 2024-01-04 22:58:12 +10:30
fopen-bin.h Update year range in copyright notice of binutils files 2024-01-04 22:58:12 +10:30
fopen-same.h Update year range in copyright notice of binutils files 2024-01-04 22:58:12 +10:30
fopen-vms.h Update year range in copyright notice of binutils files 2024-01-04 22:58:12 +10:30
gcc-c-fe.def Synchronize GCC compile plugin headers 2024-02-29 15:34:38 -07:00
gcc-c-interface.h Synchronize GCC compile plugin headers 2024-02-29 15:34:38 -07:00
gcc-cp-fe.def Update year range in copyright notice of binutils files 2024-01-04 22:58:12 +10:30
gcc-cp-interface.h Synchronize GCC compile plugin headers 2024-02-29 15:34:38 -07:00
gcc-interface.h Update year range in copyright notice of binutils files 2024-01-04 22:58:12 +10:30
getopt.h Update year range in copyright notice of binutils files 2024-01-04 22:58:12 +10:30
hashtab.h Update year range in copyright notice of binutils files 2024-01-04 22:58:12 +10:30
hp-symtab.h Update year range in copyright notice of binutils files 2024-01-04 22:58:12 +10:30
leb128.h Update year range in copyright notice of binutils files 2024-01-04 22:58:12 +10:30
libcollector.h Update year range in copyright notice of binutils files 2024-01-04 22:58:12 +10:30
libfcollector.h Update year range in copyright notice of binutils files 2024-01-04 22:58:12 +10:30
libiberty.h Update year range in copyright notice of binutils files 2024-01-04 22:58:12 +10:30
longlong.h Update year range in copyright notice of binutils files 2024-01-04 22:58:12 +10:30
lto-symtab.h Update year range in copyright notice of binutils files 2024-01-04 22:58:12 +10:30
MAINTAINERS Update year range in copyright notice of binutils files 2024-01-04 22:58:12 +10:30
md5.h Update year range in copyright notice of binutils files 2024-01-04 22:58:12 +10:30
oasys.h Update year range in copyright notice of binutils files 2024-01-04 22:58:12 +10:30
objalloc.h Update year range in copyright notice of binutils files 2024-01-04 22:58:12 +10:30
obstack.h Update year range in copyright notice of binutils files 2024-01-04 22:58:12 +10:30
os9k.h Update year range in copyright notice of binutils files 2024-01-04 22:58:12 +10:30
partition.h Update year range in copyright notice of binutils files 2024-01-04 22:58:12 +10:30
plugin-api.h Update year range in copyright notice of binutils files 2024-01-04 22:58:12 +10:30
safe-ctype.h Update year range in copyright notice of binutils files 2024-01-04 22:58:12 +10:30
sframe-api.h Update year range in copyright notice of binutils files 2024-01-04 22:58:12 +10:30
sframe.h Update year range in copyright notice of binutils files 2024-01-04 22:58:12 +10:30
sha1.h Update year range in copyright notice of binutils files 2024-01-04 22:58:12 +10:30
simple-object.h Update year range in copyright notice of binutils files 2024-01-04 22:58:12 +10:30
sort.h Update year range in copyright notice of binutils files 2024-01-04 22:58:12 +10:30
splay-tree.h Update year range in copyright notice of binutils files 2024-01-04 22:58:12 +10:30
symcat.h Update year range in copyright notice of binutils files 2024-01-04 22:58:12 +10:30
timeval-utils.h Update year range in copyright notice of binutils files 2024-01-04 22:58:12 +10:30
vtv-change-permission.h Update year range in copyright notice of binutils files 2024-01-04 22:58:12 +10:30
xregex2.h Update year range in copyright notice of binutils files 2024-01-04 22:58:12 +10:30
xregex.h
xtensa-config.h Update year range in copyright notice of binutils files 2024-01-04 22:58:12 +10:30
xtensa-dynconfig.h Update year range in copyright notice of binutils files 2024-01-04 22:58:12 +10:30
xtensa-isa-internal.h Update year range in copyright notice of binutils files 2024-01-04 22:58:12 +10:30
xtensa-isa.h Update year range in copyright notice of binutils files 2024-01-04 22:58:12 +10:30