gdb/

gdb/
	* solib-svr4.c (scan_dyntag): Remove variable dyn_addr.  New variable
	target_section.  Find SECT in current_target_sections, gdb_assert it.
	(elf_lookup_lib_symbol): Pass the binary file if given symfile_objfile.
	New variable abfd.
	* symtab.c (lookup_objfile_from_block): Return the binary file instead
	of separate debug info file.

gdb/testsuite/
	* gdb.base/break-interp.exp (test_core): New proc.
	(test_ld): Call it.