FRAMELESS_FUNCTION_INVOCATION, FRAME_SAVED_PC, SIGCONTEXT_PC_OFFSET): Define to make backtracing through sigtramp work. * config/vax/tm-vax.h (SIGTRAMP_START, SIGTRAMP_END, TARGET_UPAGES, FRAME_SAVED_PC, SIGCONTEXT_PC_OFFSET): Ditto.
config files moved to an appropriate config/<cpu> subdirectory. * nm-*, xm-*, tm-*: All native, host, and target files, which get linked to nm.h, xm.h, and tm.h respectively by configure, moved to appropriate config/<cpu> subdirectory.