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* xtensa-config.c (rmap): Remove entries for ar32 through ar63. Add
threadptr, scompare1, mmid, epc5, epc6, epc7, eps5, eps6, eps7,
excsave5, excsave6, excsave7, cpenable, and vecbase registers.
(xtensa_submask0, xtensa_submask1, xtensa_submask2)
(xtensa_submask3, xtensa_submask4, xtensa_submask5, xtensa_submask6)
(xtensa_submask7, xtensa_submask8, xtensa_submask9, xtensa_submask10)
(xtensa_submask11, xtensa_submask12, xtensa_submask13, xtensa_submask14)
(xtensa_submask15): Adjust register numbers.
* xtensa-xtregs.c (XTENSA_ELF_XTREG_SIZE): Change to 4.
(xtensa_regmap_table): Add entry for scompare1.
* regformats/reg-xtensa.dat: Remove ar32 through ar63. Add threadptr
and scompare1.
gdb/gdbserver/
* xtensa-xtregs.c (XTENSA_ELF_XTREG_SIZE): Change to 4.
(xtensa_regmap_table): Add entry for scompare1.
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* 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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