* features/Makefile (WHICH): Add s390-linux32, s390-linux64,
and s390x-linux64.
(s390-linux32-expedite): Define.
(s390-linux64-expedite): Define.
(s390x-linux64-expedite): Define.
* features/s390-acr.xml: New file.
* features/s390-fpr.xml: New file.
* features/s390-core32.xml: New file.
* features/s390-core64.xml: New file.
* features/s390x-core64.xml: New file.
* features/s390-linux32.xml: New file.
* features/s390-linux64.xml: New file.
* features/s390x-linux64.xml: New file.
* features/s390-linux32.c: New generated file.
* features/s390-linux64.c: New generated file.
* features/s390x-linux64.c: New generated file.
* regformats/s390-linux32.dat: New generated file.
* regformats/s390-linux64.dat: New generated file.
* regformats/s390x-linux64.dat: New generated file.
* regformats/reg-s390.dat: Remove.
* regformats/reg-s390x.dat: Remove.
* s390-nat.c: Include "auxv.h" and <elf.h>.
(HWCAP_S390_HIGH_GPRS): Define if undefined.
(s390_target_wordsize): New function.
(s390_auxv_parse): Likewise.
(s390_get_hwcap): Likewise.
(s390_read_description): Likewise.
(_initialize_s390_nat): Install s390_auxv_parse and
s390_read_description.
* s390-tdep.c: Include "features/s390-linux32.c",
"features/s390-linux64.c", and "features/s390x-linux64.c".
(struct gdbarch_tdep): Add gpr_full_regnum, pc_regnum, and cc_regnum.
(s390_register_call_saved): New function.
(s390_register_name): Remove.
(s390_register_type): Remove.
(s390_dwarf_regmap): Add lower half GPR pseudo DWARF CFI regnums.
(s390_dwarf_reg_to_regnum): Remap GPR regnums to full GPRs.
(s390_adjust_frame_regnum): Remap GPR regnums to lower halves for CFI.
(s390_pseudo_register_name): New function.
(s390_pseudo_register_type): New function.
(s390_pseudo_register_read): Handle both 32-bit and 64-bit cases.
Handle full GPR pesudos and varying pseudo register numbers.
(s390_pseudo_register_write): Likewise
(s390x_pseudo_register_read): Remove.
(s390x_pseudo_register_write): Likewise.
(s390_register_group): Remove.
(s390_pseudo_register_group): New function.
(s390_regmap_gregset): Add GPR upper halves.
(s390x_regmap_gregset): Likewise.
(s390_regmap_fpregset): Likewise.
(s390_regmap_upper): New global variable.
(s390_upper_regset): New global variable.
(s390_upper_regset_sections): New global variable.
(s390_regset_from_core_section): Handle GPR upper halves.
(s390_core_read_description): New function.
(s390_prologue_frame_unwind_cache): Set up ABI call-saved/clobbered
register information. Handle varying pseudo register numbers.
(s390_backchain_frame_unwind_cache): Likewise.
(s390_frame_prev_register): Unwind full GPRs to show lower halves.
(s390_stub_frame_unwind_cache): Handle varying pseudo register numbers.
(s390_sigtramp_frame_unwind_cache): Unwind PSWM and PSWA as well as
PC and CC pseudos. Unwind upper halves and full GPRs as appropriate.
Handle varying pseudo register numbers.
(s390_unwind_pc): Handle varying pseudo register numbers.
(s390_dwarf2_prev_register): New function.
(s390_dwarf2_frame_init_reg): Set up ABI call-saved/clobbered
register information. Handle varying pseudo register numbers.
Install s390_dwarf2_prev_register to unwind full GPRs.
(s390_gdbarch_init): Handle target descriptions. Assign varying
pseudo register numbers. Install s390_adjust_frame_regnum.
(_initialize_s390_tdep): Initialize target descriptions.
* s390-tdep.h (S390_R0_UPPER_REGNUM .. S390_R15_UPPER_REGNUM): Define.
(S390_NUM_REGS): Redefine to include upper half registers.
(S390_PC_REGNUM, S390_CC_REGNUM): Remove.
(S390_NUM_PSEUDO_REGS, S390_NUM_TOTAL_REGS): Likewise.
(tdesc_s390_linux32): Add declaration.
(tdesc_s390_linux64): Likewise.
(tdesc_s390x_linux64): Likewise.
gdb/testsuite/
* gdb.xml/tdesc-regs.exp: Support s390*-*-* targets.
gdbserver/
* Makefile.in (clean): Remove new generated files.
(reg-s390.o, reg-s390.c): Remove rules.
(reg-s390x.o, reg-s390x.c): Likewise.
(s390-linux32.o, s390-linux32.c): Add rules.
(s390-linux64.o, s390-linux64.c): Likewise.
(s390x-linux64.o, s390x-linux64.c): Likewise.
* configure.srv (s390*-*-linux*): Update srv_regobj and srv_xmlfiles.
* linux-s390-low.c: Include <elf.h>.
(HWCAP_S390_HIGH_GPRS): Define if undefined.
(init_registers_s390): Remove prototype.
(init_registers_s390x): Likewise.
(init_registers_s390_linux32): Add prototype.
(init_registers_s390_linux64): Likewise.
(init_registers_s390x_linux64): Likewise.
(s390_num_regs_3264): New define.
(s390_regmap_3264): New global variable.
(s390_cannot_fetch_register): Remove obsolete check.
(s390_cannot_store_register): Likewise.
(s390_collect_ptrace_register): Handle upper/lower register halves.
(s390_supply_ptrace_register): Likewise.
(s390_fill_gregset): Update to register number changes.
(s390_get_hwcap): New routine.
(s390_arch_setup): Detect 32-bit process running on 64-bit system.
Install appropriate regmap and register set.
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