2008-02-11 Maxim Grigoriev <maxim2405@gmail.com>

	* NEWS (New native configurations): Xtensa GNU/Linux.
	(New targets): Xtensa GNU/Linux.
	* Makefile.in (ALL_TARGET_OBS): Add xtensa-linux-nat.o and
	xtensa-linux-tdep.o
	(ALLDEPFILES): Add xtensa-linux-tdep.c and xtensa-linux-nat.c
	(xtensa-linux-nat.o, xtensa-linux-tdep.o): New dependencies.
	* configure.tgt (xtensa*-*-linux*): New entry.
	* xtensa-config.c (xtensa_tdep): New variable.
	(xtensa_config_byte_order, xtensa_config_tdep): Removed.
	(rmap): Change format based on new macro XTREG.
	(XTENSA_CONFIG_INSTANTIATE): Use new macro defined in xtensa-tdep.h.
	* xtensa-linux-nat.c: New.
	* xtensa-linux-tdep.c: New.
	* xtensa-xtregs.c: New.
	* xtensa-tdep.h (xtensa_elf_gregset_t): Update.
	(XTENSA_ELF_NGREG, XTREG, XTREG_END, XTENSA_GDBARCH_TDEP_INSTANTIATE)
	(XCHAL_NUM_CONTEXTS, XCHAL_HAVE_EXCEPTIONS): New macros.
	(xtensa_register_t): New field coprocessor.
	(XTENSA_REGISTER_FLAGS_PRIVILEGED): Name spelling corrected.
	* xtensa-tdep.c (xtensa_config_tdep, xtensa_config_byte_order): Removed.
	(xtensa_pseudo_register_read, xtensa_pseudo_register_write):
	Update to handle privileged registers.
	(xtensa_supply_gregset) Remove exccause and excvaddr registers.
	(xtensa_push_dummy_call): Set windowstart register correctly.
	(call0_analyze_prologue): Initialize xtensa_default_isa.
	(xtensa_derive_tdep): New.
	(xtensa_gdbarch_init): Get rid of xtensa_config_byte_order and
	xtensa_config_tdep, use XCHAL_HAVE_BE and xtensa_tdep instead.
	Call xtensa_derive_tdep().
	* config/xtensa/linux.mh: New.
	* regformats/reg-xtensa.dat: New.

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