[PATCH] Ignore the first entry returned by svr4_current_sos_via_xfer_libraries for dynamically linked programs

[Ben Cheng <bccheng@google.com>]

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The first entry in the xml list returned by
svr4_current_sos_via_xfer_libraries() is the executable itself. For
dynamically linked programs, the existing code that deals with
gdbserver that doesn't support svr4_current_sos_via_xfer_libraries is
ignoring the first entry. This patch applies the same logic on the
result returned by svr4_current_sos_via_xfer_libraries().

See GDB PR/15507 for more details.

--

2013-05-28  Ben Cheng  <bccheng@android.com>

    PR gdb/15507:
    * solib-svr4.c (svr4_current_sos): Ignore the first library list
    entry returned by svr4_current_sos_via_xfer_libraries call for
    dynamically linked programs.

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Index: solib-svr4.c
===================================================================
RCS file: /cvs/src/src/gdb/solib-svr4.c,v
retrieving revision 1.178
diff -r1.178 solib-svr4.c
1285c1285,1291
<       return library_list.head ? library_list.head : svr4_default_sos ();
---
>       /* Use the same logic that determines the 'ignore_first' variable
>          below. PR - 15507 */
>       if (exec_bfd && bfd_get_section_by_name (exec_bfd, ".dynamic") == NULL)
> 	return library_list.head ? library_list.head : svr4_default_sos ();
>       else
> 	return library_list.head && library_list.head->next ?
> 	  library_list.head->next : svr4_default_sos ();