a question about debug using gdb(/lib32/libc.so.6: No such file or directory)


 
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Old 01-16-2009
a question about debug using gdb(/lib32/libc.so.6: No such file or directory)

Hi all,

(gdb) target remote 192.168.185.196:1389
Remote debugging using 192.168.185.196:1389
warning: Unable to find dynamic linker breakpoint function.
GDB will be unable to debug shared library initializers
and track explicitly loaded dynamic code.
0x2fbd0800 in ?? ()
(gdb) l
1 #include <stdio.h>
2
3 int main()
4 {
5 printf ("Hello World\n");
6 return 0;
7 }
(gdb) b main
Breakpoint 1 at 0x1000067c: file hello.c, line 5.
(gdb) info reg pc
pc: 0x2fbd0800
(gdb) c
Continuing.
Error while mapping shared library sections:
/lib32/libc.so.6: No such file or directory.
Error while mapping shared library sections:
/lib32/ld.so.1: No such file or directory.

Breakpoint 1, main () at hello.c:5
5 printf ("Hello World\n");


From the above message, we can see the gdb use the host lib,as we know, It *should* using target lib, it confuses me , why it can get the right output using the host lib,
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tgt-setup-lun(8)					      System Manager's Manual						  tgt-setup-lun(8)

NAME
tgt-setup-lun - creates a target, adds a device to the target and defines initiators that can connect to the target SYNOPSIS
tgt-setup-lun -d device -n target_name [initiator_IP1 initiator_IP2 ...] [-h] DESCRIPTION
Starts tgtd if necessary and creates a target according to the supplied target_name. The format of the target name is as follows: iqn.2001-04.com.<hostname>-<target_name> The target name must be unique. The script then adds the requested device to the target. If specific IP addresses are defined, it adds them to the list of allowed initia- tors for that target. If no IP addresses is defined, it defines that the target accepts any initiator. EXAMPLES
Create a target that uses /dev/sdb1 and allows connections only from 192.168.10.81: tgt-setup-lun -d /dev/sdb1 -n my_target 192.168.10.81 Create a target that uses /dev/sdb1 and allows connections only from 192.168.10.81 and 192.168.10.82: tgt-setup-lun -d /dev/sdb1 -n my_target 192.168.10.81 192.168.10.82 Create a target that uses /dev/sdb1 and allows connections from any initiator: tgt-setup-lun -d /dev/sdb1 -n my_target Display help: tgt-setup-lun -h AUTHOR
Written by Erez Zilber REPORTING BUGS
Report bugs to <stgt@vger.kernel.org> COPYRIGHT
Copyright (C) Voltaire Ltd. 2008. tgt-setup-lun(8)