mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-11-21 01:12:32 +08:00
c1cdee0e2c
LoongArch defines hardware watchpoint functions for load/store operations. After the software configures the watchpoints for load/store, the processor hardware will monitor the access addresses of the load/store operations and trigger watchpoint exception when the watchpoint setting conditions are met. After this patch, watch/rwatch/awatch command are supported. Refer to the following document for hardware watchpoint. 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) awatch a Target does not support this type of hardware watchpoint. ... with this patch: lihui@bogon:~$ gdb test ... (gdb) start ... Temporary breakpoint 1, main () at test.c:5 5 printf("start test\n"); (gdb) awatch a Hardware access (read/write) watchpoint 2: a (gdb) c Continuing. start test Hardware access (read/write) watchpoint 2: a Old value = 0 New value = 1 main () at test.c:7 7 printf("a = %d\n", a); (gdb) c Continuing. Hardware access (read/write) watchpoint 2: a Value = 1 0x00000001200006e0 in main () at test.c:7 7 printf("a = %d\n", a); (gdb) c Continuing. a = 1 end test [Inferior 1 (process 22250) exited normally] Signed-off-by: Hui Li <lihui@loongson.cn> Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
43 lines
1.4 KiB
C
43 lines
1.4 KiB
C
/* Native-dependent code for GNU/Linux on LoongArch processors.
|
|
|
|
Copyright (C) 2024 Free Software Foundation, Inc.
|
|
Contributed by Loongson Ltd.
|
|
|
|
This file is part of GDB.
|
|
|
|
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 3 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/>. */
|
|
|
|
#ifndef NAT_LOONGARCH_LINUX_H
|
|
#define NAT_LOONGARCH_LINUX_H
|
|
|
|
#include <signal.h>
|
|
|
|
/* Defines ps_err_e, struct ps_prochandle. */
|
|
#include "gdb_proc_service.h"
|
|
|
|
/* Called when resuming a thread LWP.
|
|
The hardware debug registers are updated when there is any change. */
|
|
|
|
void loongarch_linux_prepare_to_resume (struct lwp_info *lwp);
|
|
|
|
/* Function to call when a new thread is detected. */
|
|
|
|
void loongarch_linux_new_thread (struct lwp_info *lwp);
|
|
|
|
/* Function to call when a thread is being deleted. */
|
|
|
|
void loongarch_linux_delete_thread (struct arch_lwp_info *arch_lwp);
|
|
|
|
#endif /* LOONGARCH_LINUX_H */
|