嵌入式

Bus error 问题原因

2019-07-13 09:24发布

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在x86+Linux上写的程序，在PC机上运行得很好。可是使用ARM的gcc进行交叉编译，再送到DaVinci目标板上运行的时候，出现了Bus error。 出现的位置如下（其中Debug的内容是我在程序中添加的调试信息）：
root@211.69.193.189:~# arm_v5t_le-gcc -g shit.c
root@211.69.193.189:~# ./a.out
Debug: malloc space for the actual data: temp_buf = 0x13118
Debug: in my_recvn()
Debug: nleft = 52
Bus error
打开调试器进行调试：
root@211.69.193.189:~# gdb a.out
GNU gdb 6.3 (MontaVista 6.3-20.0.22.0501131 2005-07-22)
Copyright 2004 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB. Type "show warranty" for details.
This GDB was configured as "armv5tl-montavista-linuxeabi"...Using host libthread_db library "/lib/tls/libthread_db.so.1".

(gdb) run // 运行程序
Starting program: /home/zpf/a.out
Debug: in get_program_info()
Debug: in conn_server(char *err_buf_ptr)
Debug: gonna create a socket
Debug: gonna fill in the serv_addr structure
Debug: gonna connect to a server
Debug: gonna send LIN_RST
Debug: in my_sendn()
Debug: send 4 bytes to server:
Debug: gonna receive LIN_RSP
Debug: in my_recvn()
Debug: nleft = 3
Debug: received first 3 bytes from server: 7
Debug: gonna check if 3rd byte is the package type
Debug: received package length = 55
Debug: malloc space for the actual data: temp_buf = 0x13118
Debug: in my_recvn()
Debug: nleft = 52

Program received signal SIGBUS, Bus error. // 在这里出现了错误
0x00009624 in alloc_prog_mem (detail_buf=0x13118 "