标签：version listening test instr ant watch gdb opp copyright
GDB调试是应用程序在开发板上运行，然后在PC机上对开发板上得应用程序进行调试，PC机运行GDB，开发板上运行GDBServer。在应用程序调试的时候，pc机上的gdb向开发板上的GDBServer发出命令，而开发板上的gdbserver就会向应用程序发出信号，使应用程序停下来或者完成其他一些工作。
2、安装GDB和GDBServer(gdb-7.4.tar.bz2 )
linux-arm-low.c: In function `arm_stopped_by_watchpoint‘: linux-arm-low.c:642: error: `PTRACE_GETSIGINFO‘ undeclared (first use in this function) linux-arm-low.c:642: error: (Each undeclared identifier is reported only once linux-arm-low.c:642: error: for each function it appears in.)
该错误是因为找不到PTRACE_GETSIGINFO宏，导致编译错误。我们到交叉编译链去搜索一下，我们交叉编译地址为 /work/tools/gcc-3.4.5-glibc-2.3.6
# cd /work/tools/gcc-3.4.5-glibc-2.3.6 # grep "PTRACE_GETSIGINFO" * -nR arm-linux/sys-include/linux/ptrace.h:27:#define PTRACE_GETSIGINFO 0x4202 arm-linux/include/linux/ptrace.h:27:#define PTRACE_GETSIGINFO 0x4202 distributed/arm-linux/sys-include/linux/ptrace.h:27:#define PTRACE_GETSIGINFO 0x4202 distributed/arm-linux/include/linux/ptrace.h:27:#define PTRACE_GETSIGINFO 0x4202
可以看到，在交叉编译链里面，定义了PTRACE_GETSIGINFO宏为0x4202，头文件为include<linux/ptrace.h>中。
有两种解决办法，可任选其一：
① 在linux-arm-low.c中直接添加宏 #define PTRACE_GETSIGINFO 0x4202
② 在linux-arm-low.c中将#include <sys/ptrace.h> 更改为 #include <linux/ptrace.h>
再次编译，编译通过。
#cp gdbserver /work/nfs_root/first_fs/bin
#include <stdio.h> void C(int *p) { *p = 0x12; } void B(int *p) { C(p); } void A(int *p) { B(p); } void A2(int *p) { C(p); } int main(int argc, char **argv) { int a; int *p = NULL; A2(&a); // A2 > C printf("a = 0x%x\n", a); A(p); // A > B > C return 0; }
编译：
#arm-linux-gcc -g -o test_debug test_debug.c
#gdbserver 192.168.1.10:123 ./test_debug
Process ./test_debug created; pid = 751 Listening on port 2345
/bin/arm-linux-gdb ./test-debug target remote 192.168.183.127:2345
GNU gdb (GDB) 7.4 Copyright (C) 2012 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 "--host=i686-pc-linux-gnu --target=arm-linux". For bug reporting instructions, please see: <http://www.gnu.org/software/gdb/bugs/>... Reading symbols from /home/share/jz2440/test_debug...done. [New LWP 748] warning: `/lib/libc.so.6‘: Shared library architecture unknown is not compatible with target architecture arm. warning: `/lib/ld-linux.so.2‘: Shared library architecture unknown is not compatible with target architecture arm. Core was generated by `./test_debug‘. Program terminated with signal 11, Segmentation fault. #0 0x000084ac in C (p=0x0) at test_debug.c:6 6 *p = 0x12;
#0 0x000084ac in C (p=0x0) at test_debug.c:6 #1 0x000084d0 in B (p=0x0) at test_debug.c:12 #2 0x000084f0 in A (p=0x0) at test_debug.c:17 #3 0x00008554 in main (argc=1, argv=0xbeb32eb4) at test_debug.c:34
标签：version listening test instr ant watch gdb opp copyright
原文地址：http://www.cnblogs.com/veryStrong/p/6240769.html
