[uClibc] gdbserver on arm?

[Paul Bohme]

  Hey, have something here that seems to me as if I'm missing something 
obvious, but am just not getting it.  So far I've been unable to get a 
gdbserver session going properly on an ARM-based chip (ARM922T core), 
when connected from the matching arm-linux-uclibc-gdb - both buildroot 
created.

  After pulling the buildroot (both and older one and the latest one for 
sanity) and doing a simple build with both target gdb and gdbserver, I 
can boot off the generated image.  I can launch gdb on the target with a 
small test executable and it works beautifully.  It indicates that it's 
loading the threading library, so am assuming that thread support is 
happy as well (this is good - I'll need it later..)  The problem comes 
in when I try to debug an application that is just too big for gdb and 
the app at the same time on the target: A perfect opportunity for 
gdbserver, right?

  I have a test program that is a simple loop, something to just step 
through as it prints numbers.  So a standard invocation of gdbserver on 
the target:

gdbserver host:1234 test
Process test created; pid = 142

  On the PC:

arm-linux-uclibc-gdb test

GNU gdb 6.2.1
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 "--host=i386-pc-linux-gnu 
--target=arm-linux-uclibc"...
(gdb) target remote 192.168.192.214:1234
Remote debugging using 192.168.192.214:1234
0x4000106c in ?? ()
warning: Unable to find dynamic linker breakpoint function.
GDB will be unable to debug shared library initializers
and track explicitly loaded dynamic code.
(gdb) break main
Breakpoint 1 at 0x8494: file test.c, line 5.
(gdb) cont
Continuing.
Error while mapping shared library sections:
/lib/libc.so.0: No such file or directory.
Error while mapping shared library sections:
/lib/ld-uClibc.so.0: No such file or directory.
Error while reading shared library symbols:
/lib/libc.so.0: No such file or directory.
Error while reading shared library symbols:
/lib/ld-uClibc.so.0: No such file or directory.

(gdb) load [fully qualified path]/lib/libc.so.0
Loading section .hash, size 0x25ac lma 0xd4
Memory access error while loading section .hash.

Breakpoint 1, main (argc=1, argv=0xbffffed4) at test.c:5
5         int n = 0;
(gdb) print n
$1 = 1
(gdb) step
Cannot access memory at address 0x0
7         for(n = 0; n < 10; n++) {
(gdb)
Cannot access memory at address 0x0
8           printf("%d\n", n);
(gdb)
Segmentation fault


OK, so there are a few things here:
1) Couldn't load dynamic linker?
2) Couldn't find libraries to load?
3) Couldn't load libraries given a full path?
4) The most obvious: dies trying to step through code.

Am at a loss, and could really use the tools.  Google for gdbserver and 
uClibc doesn't yield much, neither do the gdb errors google out to 
anything useful (so far, am still looking..)

Advice?