[RFA] MIPS DWARF2 CFI support

[Martin M. Hunt]

This is really kevinb's work, with some minor tweaks.  I've tested this
on over 50 multilib combinations and it looks goood.

2004-05-26  Kevin Buettner: 

	* dwarf2-frame.c (execute_cfa_program): Fix typo in which the
	alignment was being added to the offset instead of multiplied.

	* dwarf2-frame.c (struct comp_unit): Add new field ``signed_addr_p''.
	(encoding_for_size): Add new parameter ``signed_addr_p''.  Adjust
	all callers.  Add code for handling signed encodings.
	(dwarf2_build_frame_info): Initialize ``unit.signed_addr_p''.

	* dwarf2-frame.c (dwarf2_build_frame_info): Set unit.addr_size.

	* config/mips/tm-mips.h (SP_REGNUM): Delete define.
	* mips-tdep.h (MIPS_SP_REGNUM): Define.
	* mips-tdep.c (mips_gdbarch_init): Set SP_REGNUM via call
	to set_gdbarch_sp_regnum().  Use cooked register number.
	(SP_REGNUM): Replace all occurrences with MIPS_SP_REGNUM.

	* mips-tdep.c (mips_gdbarch_init): Set PC_REGNUM (via
	call to set_gdbarch_pc_regnum()) to cooked register number.

	* mips-tdep.c (dwarf2-frame.h): Include.
	(mips_gdbarch_init): Enable DWARF2 CFI support.


-- 
Martin M. Hunt <hunt@redhat.com>
Red Hat Inc.
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