Re: more info on Help needed for gdbserver on redhat 9, thanks!

[Daniel Jacobowitz <drow at mvista dot com>]

On Mon, Oct 06, 2003 at 06:17:44PM -0700, Ming Sun wrote:
> After changed to static linking without share liberies. The gdbserver works
> for the test program. But my real program cannot work with static library
> due to different thread behave. Does anyone know why dynamic library
> causes SEGSEGV in gdbserver? By the way, I check /usr/lib/libglib* on
> both PCs. All files have same size and date.

Your two hosts do not have the same libraries.

Either make sure that they do, or else use set solib-absolute-prefix;
copy the target's library layout to the host and point GDB at it before
connecting.

> 
> Thanks,
> 
> Ming
> 
> ===========================================================================
> 
> I got two PCs. One is running target and run gdbserber and the other is 
> host and run
> gdb. Both are redhat 9. I am constantly get SIGSEGV before it reaches 
> main().
> Gdb works fine in local machine. Does anyone know what is my problem?
> Thanks in advance for your help!
> 
> Ming
> 
> Here are the outputs from both target and host.
> 
> ==============TARGET==============
> root@pc28 x86]# gdbserver foo:5432 test
> Process test created; pid = 3569
> Remote debugging from host 192.168.0.57
> 
> 
> ==============HOST==============
> 
> [root@mings x86]# gdb test
> GNU gdb Red Hat Linux (5.3post-0.20021129.18rh)
> Copyright 2003 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 "i386-redhat-linux-gnu"...
> (gdb) target remote 192.168.0.155:5432
> Remote debugging using 192.168.0.155:5432
> 0x40000c10 in ?? ()
> (gdb) symbol-file test
> Load new symbol table from "test"? (y or n) y
> Reading symbols from test...done.
> (gdb) list main
> 1 #include <stdio.h>
> 2
> 3 main (int argc,
> 4 char *argv[])
> 5 {
> 6 printf ("test gdbserver\n");
> 7 }
> (gdb) br main
> Breakpoint 1 at 0x8048338: file test.c, line 6.
> (gdb) c
> Continuing.
> 
> Program received signal SIGSEGV, Segmentation fault.
> 0x0c011ad7 in ?? ()
> (gdb) where
> #0 0x0c011ad7 in ?? ()
> #1 0x40001365 in ?? ()
> #2 0x4000eebf in ?? ()
> #3 0x40000f53 in ?? ()
> (gdb) quit
> The program is running. Exit anyway? (y or n) y
> [root@mings x86]# gcc -v
> Reading specs from /usr/lib/gcc-lib/i386-redhat-linux/3.2.2/specs
> Configured with: ../configure --prefix=/usr --mandir=/usr/share/man 
> --infodir=/usr/share/info --enable-shared --enable-threads=posix 
> --disable-checking --with-system-zlib --enable-__cxa_atexit 
> --host=i386-redhat-linux
> Thread model: posix
> gcc version 3.2.2 20030222 (Red Hat Linux 3.2.2-5)
> 
> 

-- 
Daniel Jacobowitz
MontaVista Software                         Debian GNU/Linux Developer