gdb/

gdb/
	* auxv.c (memory_xfer_auxv): Update attach comment.
	* solib-svr4.c (svr4_special_symbol_handling): Remove the call to
	svr4_relocate_main_executable.
	(svr4_solib_create_inferior_hook): Make the call to
	svr4_relocate_main_executable unconditional.

gdb/testsuite/
	* gdb.base/attach-pie-misread.exp, gdb.base/attach-pie-misread.c: New.
	* gdb.base/break-interp.exp (reach, test_core, test_ld): Require each
	displacement message exactly once.