gdb/

gdb/
	PR breakpoints/13346
	* dwarf2read.c (process_psymtab_comp_unit): Set
	PSYMTABS_ADDRMAP_SUPPORTED.
	* psympriv.h (struct partial_symtab): Comment textlow and texthigh
	validity.  New field psymtabs_addrmap_supported.
	* psymtab.c (find_pc_sect_psymtab_closer): New gdb_assert on
	psymtabs_addrmap_supported.
	(find_pc_sect_psymtab): Do not fallback to TEXTLOW and TEXTHIGH for
	!PSYMTABS_ADDRMAP_SUPPORTED.
	(dump_psymtab, maintenance_info_psymtabs): Print also
	psymtabs_addrmap_supported.

gdb/testsuite/
	PR breakpoints/13346
	* gdb.dwarf2/dw2-objfile-overlap-inner.S: New file.
	* gdb.dwarf2/dw2-objfile-overlap-outer.S: New file.
	* gdb.dwarf2/dw2-objfile-overlap.exp: New file.