开源网站代码,网站seo诊断评分63,网站的设计风格有哪些,上海城隍庙景点介绍文章目录 1. 前言2. GDB 远程调试2.1 准备工作2.1.1 准备 客户端 gdb 程序2.1.2 准备 服务端 gdbserver2.1.3 准备 被调试程序 2.2 调试2.2.1 通过网络远程调试2.2.1.1 通过 gdbserver 直接启动程序调试2.2.1.2 通过 gdbserver 挂接到已运行程序调试 2.2.2 通过串口远程调试2.2… 文章目录 1. 前言2. GDB 远程调试2.1 准备工作2.1.1 准备 客户端 gdb 程序2.1.2 准备 服务端 gdbserver2.1.3 准备 被调试程序 2.2 调试2.2.1 通过网络远程调试2.2.1.1 通过 gdbserver 直接启动程序调试2.2.1.2 通过 gdbserver 挂接到已运行程序调试 2.2.2 通过串口远程调试2.2.1.1 通过 gdbserver 直接启动程序调试2.2.1.2 通过 gdbserver 挂接到已运行程序调试 3. 参考资料 1. 前言
限于作者能力水平本文可能存在谬误因此而给读者带来的损失作者不做任何承诺。
2. GDB 远程调试
GDB 远程调试同时需要 服务端 gdbserver 和 客户端 gdb 两个程序。本文以 ARM32 嵌入式设备内程序的调试为例对 GDB 远程调试方法进行说明。
先对 服务端 gdbserver 和 客户端 gdb 连接拓扑做一个梗概描绘
2.1 准备工作
2.1.1 准备 客户端 gdb 程序
客户端 gdb 通过和 服务端 gdbserver 的交互对运行于目标机器的程序进行调试。笔者使用 Ubuntu 系统作为调试客户端的宿主机即 客户端 gdb 运行于 Ubuntu 下。
笔者测试使用的嵌入式设备 SDK 的交叉编译工具链已经包含了 客户端 gdb 程序无需额外准备
$ arm-linux-gnueabihf-gdb --version
GNU gdb (Linaro GDB 2016.02) 7.10.1.20160210-cvs
Copyright (C) 2015 Free Software Foundation, Inc.
License GPLv3: GNU GPL version 3 or later http://gnu.org/licenses/gpl.html
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law. Type show copying
and show warranty for details.
This GDB was configured as --hostx86_64-unknown-linux-gnu --targetarm-linux-gnueabihf.
Type show configuration for configuration details.
For bug reporting instructions, please see:
https://bugs.launchpad.net/gcc-linaro.
Find the GDB manual and other documentation resources online at:
http://www.gnu.org/software/gdb/documentation/.
For help, type help.
Type apropos word to search for commands related to word.
如果读者的交叉编译工具链没有包含 gdb在 Ubuntu 下可通过命令安装适用于多架构平台的 gdb 客户端程序
sudo apt-get install gdb-multiarch
2.1.2 准备 服务端 gdbserver
gdbserver 运行于被调试的目标机器在本文中目标机器指 ARM 嵌入式设备。笔者是通过 buildroot 构建的 gdbserver不想使用 buildroot 的读者可自行查阅相关资料进行 gdbserver 的构建。
构建好 gdbserver 后将其拷贝到目标机器。笔者是将其拷贝到目标机器的 /usr/bin 目录这样可以不用指定路径运行。
2.1.3 准备 被调试程序
/* test.c */#include unistd.hint main(void)
{while (1)sleep(5);return 0;
}
编译然后将测试程序 test 拷贝到目标机器
$ arm-linux-gnueabihf-gcc -o test test.c
2.2 调试
2.2.1 通过网络远程调试 2.2.1.1 通过 gdbserver 直接启动程序调试
首先在目标机器(本文是指 ARM32 嵌入式设备)上运行命令
# gdbserver :2345 test
Process test created; pid 440
Listening on port 2345
然后在调试器客户端机器(本文是指 Ubuntu)上运行下列命令
$ arm-linux-gnueabihf-gdb
GNU gdb (Linaro GDB 2016.02) 7.10.1.20160210-cvs
Copyright (C) 2015 Free Software Foundation, Inc.
License GPLv3: GNU GPL version 3 or later http://gnu.org/licenses/gpl.html
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law. Type show copying
and show warranty for details.
This GDB was configured as --hostx86_64-unknown-linux-gnu --targetarm-linux-gnueabihf.
Type show configuration for configuration details.
For bug reporting instructions, please see:
https://bugs.launchpad.net/gcc-linaro.
Find the GDB manual and other documentation resources online at:
http://www.gnu.org/software/gdb/documentation/.
For help, type help.
Type apropos word to search for commands related to word.
(gdb) target remote 192.168.3.8:2345
Remote debugging using 192.168.3.8:2345
Reading /root/test from remote target...
warning: File transfers from remote targets can be slow. Use set sysroot to access files locally instead.
Reading /root/test from remote target...
Reading symbols from target:/root/test...done.
Reading /lib/ld-linux-armhf.so.3 from remote target...
Reading /lib/ld-linux-armhf.so.3 from remote target...
Reading symbols from target:/lib/ld-linux-armhf.so.3...(no debugging symbols found)...done.
0xb6fd7a00 in _start () from target:/lib/ld-linux-armhf.so.3
(gdb)
在客户端宿主机(本文指 Ubuntu)启动 arm-linux-gnueabihf-gdb 后通过命令 target remote 192.168.3.8:2345 连接到目标机器。其中192.168.3.8 是目标机器的的 IP。
这时候目标机器(本文是指 ARM 嵌入设备)会输出 gdb 客户端连接的消息 Remote debugging from host 192.168.3.168
# gdbserver :2345 test
Process test created; pid 440
Listening on port 2345
Remote debugging from host 192.168.3.168
到此就可以通过 gdb 在客户端宿主机(本文指 Ubuntu)调试目标机器(本文是指 ARM 嵌入设备)的 test 程序了。
2.2.1.2 通过 gdbserver 挂接到已运行程序调试
如果 test 已经运行可以通过 attach 方式启动 gdbserver挂接到 test 程序进行调试。
先在目标机器(本文是指 ARM32 嵌入式设备)上启动 test 程序放入后台运行
# ./test
# ps -ef | grep -v grep | grep test445 root ./test
将 gdbserver 挂接到 test 进程
# gdbserver --attach :2345 445
Attached; pid 445
Listening on port 2345
在客户端宿主机(本文指 Ubuntu)启动 arm-linux-gnueabihf-gdb然后通过命令 target remote 192.168.3.8:2345 连接到目标机器调试程序
$ arm-linux-gnueabihf-gdb
GNU gdb (Linaro GDB 2016.02) 7.10.1.20160210-cvs
Copyright (C) 2015 Free Software Foundation, Inc.
License GPLv3: GNU GPL version 3 or later http://gnu.org/licenses/gpl.html
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law. Type show copying
and show warranty for details.
This GDB was configured as --hostx86_64-unknown-linux-gnu --targetarm-linux-gnueabihf.
Type show configuration for configuration details.
For bug reporting instructions, please see:
https://bugs.launchpad.net/gcc-linaro.
Find the GDB manual and other documentation resources online at:
http://www.gnu.org/software/gdb/documentation/.
For help, type help.
Type apropos word to search for commands related to word.
(gdb) target remote 192.168.3.8:2345
Remote debugging using 192.168.3.8:2345
Reading /root/test from remote target...
warning: File transfers from remote targets can be slow. Use set sysroot to access files locally instead.
Reading /root/test from remote target...
Reading symbols from target:/root/test...done.
Reading /lib/libc.so.6 from remote target...
Reading /lib/ld-linux-armhf.so.3 from remote target...
Reading symbols from target:/lib/libc.so.6...(no debugging symbols found)...done.
Reading symbols from target:/lib/ld-linux-armhf.so.3...(no debugging symbols found)...done.
Reading /lib/ld-linux-armhf.so.3 from remote target...
0xb6e9e134 in nanosleep () from target:/lib/libc.so.6
(gdb)
2.2.2 通过串口远程调试 2.2.1.1 通过 gdbserver 直接启动程序调试
在目标机运行命令
gdbserver /dev/ttyS1 test
其中/dev/ttyS1 为目标机上和客户端宿主机连接的串口设备对象。
在客户端宿主机运行命令
$ arm-linux-gnueabihf-gdb
[......]
(gdb) target remote /dev/ttyUSB0
其中/dev/ttyUSB0 为客户端宿主机上和目标机连接的串口设备对象。
2.2.1.2 通过 gdbserver 挂接到已运行程序调试
在目标机上依次运行下列命令
# test
# ps -ef | grep -v grep | grep test ## 查询 test 进程 PID
# gdbserver --attach /dev/ttyS1 445
在客户端宿主机运行命令
$ arm-linux-gnueabihf-gdb
[......]
(gdb) target remote /dev/ttyUSB0
3. 参考资料
[1] Using the gdbserver program [2] gdbserver(1) — Linux manual page
