文章目录
- 汇编单步（ni）
- 设置程序运行参数（set args）
- 查看寄存器内容（info register）
- 打印变量（p）
- 指定文件指定行设置断点（b）
- 反汇编（disassemble）
- 查看栈帧（backtrace）
- 查看当前函数的局部变量（info locals）
- gdbserver
- 问题一：unknown architecture "arm"
汇编单步（ni）
(gdb) ni
设置程序运行参数（set args）
set args <参数>
(gdb) set args -l
查看寄存器内容（info register）
(gdb) info register
打印变量（p）
(gdb) p a
$1 = (int *) 0x80d73a14 <b>
(gdb) p *a
$2 = 10指定文件指定行设置断点（b）
(gdb) b test.c:5
反汇编（disassemble）
disassemble <函数名>
(gdb) disassemble main
查看栈帧（backtrace）
(gdb) backtrace
参考：gdb 笔记（08）— 查看栈回溯信息、切换栈帧、查看帧信息
查看当前函数的局部变量（info locals）
查看当前栈帧（函数）的局部变量
Local variables of current stack frame
(gdb) info locals
gdbserver
参考：gdb远程调试
问题一：unknown architecture “arm”
target remote 127.0.0.1:1234 时，提示：
warning: while parsing target description (at line 1): Target description specified unknown architecture “arm”
liyongjun@Box:~/project/board/buildroot/Vexpress/build/linux-6.1.44$ gdb vmlinux
GNU gdb (Ubuntu 9.2-0ubuntu1~20.04.1) 9.2
Copyright (C) 2020 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 "x86_64-linux-gnu".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.
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"...
Reading symbols from vmlinux...
(gdb) target remote 127.0.0.1:1234
Remote debugging using 127.0.0.1:1234
warning: while parsing target description (at line 1): Target description specified unknown architecture "arm"
warning: Could not load XML target description; ignoring
Truncated register 16 in remote 'g' packet
(gdb) q解决：
使用正确架构的 gdb：arm-linux-gdb
liyongjun@Box:~/project/board/buildroot/Vexpress/build/linux-6.1.44$ ../../host/bin/arm-linux-gdb vmlinux
