* hppa-tdep.c: Add some missing forward declarations.
(frameless_function_invocation): Prefix the function name
by "hppa_" to avoid polluting the namespace. Update all calls
to use the new function name.
(saved_pc_after_call): Ditto.
(init_extra_frame_info): Ditto.
(frame_chain): Ditto.
(push_dummy_frame): Ditto.
(target_read_pc): Ditto.
(target_write_pc): Ditto.
(in_solib_call_trampoline): Ditto.
(in_solib_return_trampoline): Ditto.
(skip_trampoline_code): Ditto.
(hppa_read_fp): New function, renamed from target_read_fp.
(hppa_target_read_fp): New function, using hppa_read_fp.
This function conforms to the function profile for the
READ_FP gdbarch method.
(hppa_extract_struct_value_address): New function, extracted
from the definition of the DEPRECATED_EXTRACT_STRUCT_VALUE_ADDRESS
macro.
(hppa_frame_num_args): New function.
(hppa_gdbarch_init): Setup the gdbarch vector for the hppa target.
* config/pa/tm-hppa.h: Wrap around all gdbarch-eligible macros
inside "#if !GDB_MULTI_ARCH ... #endif" conditional, in preparation
for the switch to multiarch partial.
Update some of the macros definitions to match some changes
described above in the name of the function they are calling.
(PUSH_DUMMY_FRAME): Add a FIXME explaining why this macro will
not be straightforward to convert. Do now wrap it inside
"#if !... #endif" to remember that this macro has still not
been taken care of.
(FIX_CALL_DUMMY): Likewise.
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