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* dummy-frame.c (pc_in_dummy_frame): New function.
(generic_pc_in_call_dummy): Call pc_in_dummy_frame.
(find_dummy_frame): Update comment.
(generic_pop_current_frame): Use get_frame_type.
* dummy-frame.h (pc_in_dummy_frame): Declare.
* frame.c (set_unwind_by_pc): Use pc_in_dummy_frame.
(create_new_frame): Use pc_in_dummy_frame.
(get_prev_frame): Use pc_in_dummy_frame.
(frame_saved_regs_register_unwind): Use get_prev_frame.
(deprecated_generic_get_saved_register): Use get_prev_frame.
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* frame.c (frame_pc_unwind): New function.
(frame_saved_regs_pc_unwind): New function.
(frame_register_unwind): Pass unwind_cache instead of
register_unwind_cache.
(set_unwind_by_pc): Add unwind_pc parameter, set.
(create_new_frame): Pass frame->pc_unwind to set_unwind_by_pc.
(get_prev_frame): Ditto.
* frame.h (frame_pc_unwind_ftype): Declare.
(struct frame_info): Add pc_unwind, pc_unwind_cache_p and
pc_unwind_cache. Rename register_unwind_cache to unwind_cache.
(frame_pc_unwind): Declare.
* dummy-frame.c (dummy_frame_pc_unwind): New function.
(struct dummy_frame): Add comment mentioning that values are for
previous frame.
* dummy-frame.h (dummy_frame_pc_unwind): Declare.
* blockframe.c (file_frame_chain_valid): Use frame_pc_unwind.
(generic_file_frame_chain_valid): Ditto.
* stack.c (frame_info): Ditto.
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* frame.c (set_unwind_by_pc): Use dummy_frame_register_unwind.
* dummy-frame.c (find_dummy_frame): Rename
generic_find_dummy_frame, make static. Return the dummy frame
instead of the regcache.
(generic_find_dummy_frame): Re-implement using find_dummy_frame,
(cached_find_dummy_frame): New function. Use find_dummy_frame.
(dummy_frame_register_unwind): Rename
generic_call_dummy_register_unwind. Use cached_find_dummy_frame.
* dummy-frame.h (dummy_frame_register_unwind): Rename
generic_call_dummy_register_unwind.
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* blockframe.c: Include "dummy-frame.h".
(struct dummy_frame, dummy_frame_stack)
(generic_find_dummy_frame, deprecated_generic_find_dummy_frame)
(generic_pc_in_call_dummy, deprecated_read_register_dummy)
(generic_push_dummy_frame, generic_save_dummy_frame_tos)
(generic_save_call_dummy_addr, generic_pop_current_frame)
(generic_pop_dummy_frame, generic_fix_call_dummy)
(generic_fix_call_dummy, generic_call_dummy_register_unwind): Move
dummy frame code from here...
* dummy-frame.c: ...to here. New file.
* dummy-frame.h: New file.
(generic_call_dummy_register_unwind): Declare.
(generic_find_dummy_frame): Declare.
* Makefile.in (SFILES): Add dummy-frame.c.
(dummy-frame.o): Specify dependencies.
(dummy_frame_h): Define.
(COMMON_OBS): Add dummy-frame.o.
(blockframe.o): Update dependencies.
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