* objfiles.h (obj_section), objfiles.c (build_objfile_section_table):

	* objfiles.h (obj_section), objfiles.c (build_objfile_section_table):
	Add objfile field.
	* objfiles.c (find_pc_section): Return a struct obj_section *.
	* sparc-tdep.c (in_solib_trampoline): Deal with find_pc_section return.
	* symfile.c (syms_from_objfile) [IBM6000_TARGET]:
	Don't use obj_section hack.
	* xcoffexec (vmap_symtab): Relocate obj_sections.
	* printcmd.c (containing_function_bounds): Use find_pc_section.