gdb arm64-v8a 64位平台交叉编译

参考：https://www.dandelioncloud.cn/article/details/1527473447139819521

gdb下载路径：http://ftp.gnu.org/gnu/gdb/

configure参数：./configure LDFLAGS=-static --host=aarch64-linux-gnu CC=/usr/bin/aarch64-linux-gnu-gcc CXX=aarch64-linux-gnu-g++，注意要加static参数，否则使用全路径执行gdbserver会报找不到文件错误。

错误排查

• 对于gdb7.8编译，可能会出现错误
  https://www.cnblogs.com/eastgeneral/p/11615368.html， 将相关的c文件的重复函数注释掉就行。

• 连接android平台报错：warning: while parsing target description (at line 10): Target description specified unknown architecture "arm"
  https://blog.csdn.net/qq_40351988/article/details/121631918
  使用gdb-multiarch，一般clion默认的也是这个。

• 使用clion无法catch到断点，但是使用gdb命令可以。
  可执行文件在编译的时候没有加-g参数

• file exe fialure
  1）不要使用strip处理执行文件，否则无法debug.对于clion则提示‘file exe fialure’
  2）将要debug的程序正在运行

• warning: Selected architecture aarch64 is not compatible with reported target architecture arm
  Reply contains invalid hex digit 59
  场景：ndk编译的可执行文件

mkdir -p build

cd build

rm -rf *

export CMAKE_BUILD_TYPE=Debug

cmake .. \
-DCMAKE_TOOLCHAIN_FILE=/etc/opt/pkg/android-ndk-r25c/build/cmake/android.toolchain.cmake \
-DANDROID_ABI="arm64-v8a" \
-DANDROID_NATIVE_API_LEVEL=android-24

make -j4

通过gdb-multiarch命令进入gdb命令行，执行set architecture arm，上面错误消除。但是读不到debug相关的符号表

(gdb) set architecture arm
The target architecture is assumed to be arm
(gdb)  target  remote 10.0.3.16:1234
Remote debugging using 10.0.3.16:1234
Reading /system/bin/linker64 from remote target...
warning: File transfers from remote targets can be slow. Use "set sysroot" to access files locally instead.
warning: `target:/system/bin/linker64': Shared library architecture aarch64 is not compatible with target architecture arm.
Reading /system/bin/linker64 from remote target...
warning: `target:/system/bin/linker64': Shared library architecture aarch64 is not compatible with target architecture arm.
Reading symbols from target:/system/bin/linker64...
Reading /system/bin/.debug/linker64 from remote target...
Reading /usr/lib/debug//system/bin/linker64 from remote target...
Reading /usr/lib/debug/system/bin//linker64 from remote target...
Reading target:/usr/lib/debug/system/bin//linker64 from remote target...
(No debugging symbols found in target:/system/bin/linker64)

• gdb-multiarch 读取可执行文件调试信息失败

Dwarf Error: DW_FORM_strx1 found in non-DWO CU [in module /home/xinyi/code/cplus/lxc_socket/build/lxc_socket_server] (No debugging symbols found in build/lxc_socket_server)

当编译静态链接可执行文件SET(CMAKE_EXE_LINKER_FLAGS "-static -ffunction-sections -fdata-sections -Wl,--gc-sections")时就会报上面的错误

• gdb-server 读取可执行文件调试信息失败

客户端：

(gdb) set architecture arm
The target architecture is assumed to be arm
(gdb) target remote 10.0.3.16:1234
Remote debugging using 10.0.3.16:1234
Reading /system/bin/linker64 from remote target...
warning: File transfers from remote targets can be slow. Use "set sysroot" to access files locally instead.
warning: `target:/system/bin/linker64': Shared library architecture aarch64 is not compatible with target architecture arm.
Reading /system/bin/linker64 from remote target...
warning: `target:/system/bin/linker64': Shared library architecture aarch64 is not compatible with target architecture arm.
Reading symbols from target:/system/bin/linker64...
Reading /system/bin/.debug/linker64 from remote target...
Reading /usr/lib/debug//system/bin/linker64 from remote target...
Reading /usr/lib/debug/system/bin//linker64 from remote target...
Reading target:/usr/lib/debug/system/bin//linker64 from remote target...
(No debugging symbols found in target:/system/bin/linker64)
0xb7f51c64 in ?? ()
(gdb) 

(No debugging symbols found in target:/system/bin/linker)可能的情况是调试的程序是tripped了，通过file查看一下。可以debug的是not stripped

但是奇怪的是调试文件已经是not stripped了，gdb仍然无法读取到调试符号信息。

服务端：

Remote debugging from host 10.0.2.54
gdbserver: unexpected r_debug version 0

直接使用ndk里自带的gdbserver

android-ndk-r9\prebuilt\android-arm\gdbserver

直接使用Android系统自带的gdbserver

/system/bin/gdbserver