* blockframe.c (frameless_look_for_prologue): Correct the

	* blockframe.c (frameless_look_for_prologue):  Correct the
	comment.
	* gdbtypes.h, gdbtypes.c:  Use const in decl of
	cplus_struct_default, now that pa-gas assembler has been fixed.
	* hppah-nat.c:  Formatting.
	* hppah-tdep.c:  Remove lots of useless externs for variables we
	don't use.
	* (find_unwind_entry):  Speed up by using binary search, and a one
	entry cache.
	* (rp_saved):  New routine to see what unwind info says about RP
	being saved on the stack frame.
	* (frame_saved_pc):  Look for prologue to see if we need to
	examine the stack for the saved RP or not.
	* (init_extra_frame_info):  Check for prologue, instead of
	framesize to determine if we are frameless or not.
	* (frame_chain_valid):  Stop backtraces when we run into _start.
	* (push_dummy_frame):  Reformat to make more readable.
	* (find_dummy_frame_regs):  ditto.
	* (hp_pop_frame):  ditto.
	* (hp_restore_pc_queue):  small cleanup.
	* (hp_push_arguments):  ditto.
	* (pa_do_registers_info):  ditto.
	* (skip_prologue):  New routine created from SKIP_PROLOGUE macro.
	* tm-hppa.h:  Move contents of SKIP_PROLOGUE into hppah-tdep.c.
	* Define FRAME_CHAIN_VALID.
	* Turn on BELIEVE_PCC_PROMOTION so that we can access char args
	passed to functions.

	* paread.c (pa_symtab_read):  Use new bfd conventions for
	accessing linker symbol table.
	* (pa_symfile_init):  Access embedded STAB info via BFD section
	mechanism and related macros.