[PATCH] Multi-arch a bunch of Alpha sigtramp-related stuff

[Jason R Thorpe <thorpej at wasabisystems dot com>]

It looks big, but it's really quite simple (it's mostly removal of stuff
from tm-*.h).  Moves some OSF/1-specific code to new alpha-osf1-tdep.c,
puts some OSF/1 vs. Linux (and soon NetBSD) decisions into gdbarch_tdep.

        * Makefile.in (ALLDEPFILES): Add alpha-osf1-tdep.c.
        (alpha-osf1-tdep.o): New dependency list.
        * alpha-tdep.h (gdbarch_tdep): Add dynamic_sigtramp_offset
        and skip_sigtramp_frame members. 
        * alpha-linux-tdep.c: Include gdbcore.h.
        (alpha_linux_sigtramp_offset): Change return type to LONGEST.
        (alpha_linux_init_abi): Initialize tdep->dynamic_sigtramp_offset.
        * alpha-osf1-tdep.c: New file.
        * alpha-tdep.c (alpha_osf_skip_sigtramp_frame): Moved to
        alpha-osf1-dep.c.
        (alpha_frame_past_sigtramp_frame): New function.
        (alpha_dynamic_sigtramp_offset): Ditto.
        (alpha_proc_desc_is_dyn_sigtramp): Ditto.
        (alpha_set_proc_desc_is_dyn_sigtramp): Ditto.
        (ALPHA_PROC_SIGTRAMP_MAGIC): Define. 
        (push_sigtramp_desc): Use alpha_set_proc_desc_is_dyn_sigtramp.
        (after_prologue): Use alpha_proc_desc_is_dyn_sigtramp.
        (find_proc_desc): Use alpha_dynamic_sigtramp_offset.
        (alpha_frame_chain): Use alpha_frame_past_sigtramp_frame.
        (alpha_init_extra_frame_info): Use alpha_proc_desc_is_dyn_sigtramp.
        (alpha_pop_frame): Use alpha_proc_desc_is_dyn_sigtramp.
        (alpha_gdbarch_init): Initialize tdep->dynamic_sigtramp_offset
        and tdep->skip_sigtramp_frame.  Set gdbarch_skip_trampoline_code
        to find_solib_trampoline_target.
        * config/alpha/alpha-osf1.mt (TDEPFILES): Add alpha-osf1-tdep.o.
        * config/alpha/tm-alpha.h: Remove inclusion of regcache.h.
        (SKIP_TRAMPOLINE_CODE): Remove.
        (PROC_DESC_IS_DYN_SIGTRAMP): Ditto.
        (SET_PROC_DESC_IS_DYN_SIGTRAMP): Ditto. 
        (DYNAMIC_SIGTRAMP_OFFSET): Ditto.
        (FRAME_PAST_SIGTRAMP_FRAME): Ditto.
        * config/alpha/tm-alphalinux.h (PROC_DESC_IS_DYN_SIGTRAMP): Remove.
        (PROC_SIGTRAMP_MAGIC): Ditto.
        (PROC_DESC_IS_DYN_SIGTRAMP): Ditto.
        (SET_PROC_DESC_IS_DYN_SIGTRAMP): Ditto.  
        (SET_PROC_DESC_IS_DYN_SIGTRAMP): Ditto.
        (DYNAMIC_SIGTRAMP_OFFSET): Ditto.
        (FRAME_PAST_SIGTRAMP_FRAME): Ditto.

-- 
        -- Jason R. Thorpe <thorpej@wasabisystems.com>

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