Using dlopen and remote debugging

[Steve Kreyer <steve.kreyer@web.de>]

Hi,

I have the following problem: I would like to debug a program on a remote target. This program loads a shared library with the dlopen call, but if the library is loaded, gdb on host-side doesn't find the appropriate debugging symbols of this library.
I've also tried to make use of the solib-search-path and solib-absolute-path settings but without success. Both, the application and the library, which is loaded via dlopen, are compiled using the -g switch of gcc.
I've issued the following steps:

On target side:
  $ gdbserver foo:1234 a.out

On host side:
  $ sh4-linux-uclibc-gcc -g test2.c -ldl -Wall
  $ sh4-linux-uclibc-gcc -g -shared libtest.c -o libtest.so
  $ /opt/sh4-linux-uclibc/bin/sh4-linux-uclibc-gdb a.out
  (gdb) set solib-search-path /home/skreyer
  (gdb) target remote 192.168.1.201:1234
  Remote debugging using 192.168.1.201:1234
  (gdb) b main
  Breakpoint 1 at 0x400608: file test2.c, line 12.
  (gdb) c
  Continuing.

  Breakpoint 1, main () at test2.c:12
  12 lib_handle = dlopen("/libtest.so", RTLD_NOW);
  (gdb) n
  13 foop = dlsym(lib_handle, "foo");
  (gdb) n
  15 erg = foop(1, 2);
  (gdb) p foo
  No symbol "foo" in current context.

The source code:
test2.c:
  #include <dlfcn.h>
  #include <stdio.h>

  typedef int (*funcp)(int, int);

  int main()
  {
    void *lib_handle;
    funcp foop;
    int erg;

    lib_handle = dlopen("/libtest.so", RTLD_NOW);
    foop = dlsym(lib_handle, "foo");

    erg = foop(1, 2);
    printf("%d\n", erg);

    dlclose(lib_handle);

    return 0;
  }
libtest.c:
  #include <stdio.h>

  int foo(int a, int b)
  {
    int erg;

    erg = a + b;
    return erg;
  }

Can someone give me a hint on this issue?

TIA,
Steve
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